suballoc.c revision 47dea423799d98c53793237ab386a94976f305d5
1ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* -*- mode: c; c-basic-offset: 8; -*- 2ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * vim: noexpandtab sw=8 ts=8 sts=0: 3ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 4ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * suballoc.c 5ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 6ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * metadata alloc and free 7ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * Inspired by ext3 block groups. 8ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 9ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * Copyright (C) 2002, 2004 Oracle. All rights reserved. 10ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 11ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * This program is free software; you can redistribute it and/or 12ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * modify it under the terms of the GNU General Public 13ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * License as published by the Free Software Foundation; either 14ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * version 2 of the License, or (at your option) any later version. 15ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 16ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * This program is distributed in the hope that it will be useful, 17ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * but WITHOUT ANY WARRANTY; without even the implied warranty of 18ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * General Public License for more details. 20ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 21ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * You should have received a copy of the GNU General Public 22ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * License along with this program; if not, write to the 23ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 24ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * Boston, MA 021110-1307, USA. 25ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh */ 26ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 27ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include <linux/fs.h> 28ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include <linux/types.h> 29ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include <linux/slab.h> 30ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include <linux/highmem.h> 31ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 32ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#define MLOG_MASK_PREFIX ML_DISK_ALLOC 33ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include <cluster/masklog.h> 34ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 35ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "ocfs2.h" 36ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 37ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "alloc.h" 38d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker#include "blockcheck.h" 39ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "dlmglue.h" 40ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "inode.h" 41ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "journal.h" 42ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "localalloc.h" 43ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "suballoc.h" 44ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "super.h" 45ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "sysfile.h" 46ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "uptodate.h" 47ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 48ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "buffer_head_io.h" 49ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 50ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma#define NOT_ALLOC_NEW_GROUP 0 5160ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma#define ALLOC_NEW_GROUP 0x1 5260ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma#define ALLOC_GROUPS_FROM_GLOBAL 0x2 53ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma 54b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang#define OCFS2_MAX_TO_STEAL 1024 554d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma 567d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Beckerstruct ocfs2_suballoc_result { 572b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker u64 sr_bg_blkno; /* The bg we allocated from. Set 582b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker to 0 when a block group is 592b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker contiguous. */ 60e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh u64 sr_bg_stable_blkno; /* 61e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * Doesn't change, always 62e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * set to target block 63e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * group descriptor 64e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * block. 65e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh */ 66ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker u64 sr_blkno; /* The first allocated block */ 677d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker unsigned int sr_bit_offset; /* The bit in the bg */ 687d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker unsigned int sr_bits; /* How many bits we claimed */ 697d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker}; 707d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker 71b2b6ebf5f740e015b2155343958f067e594323eaMark Fashehstatic u64 ocfs2_group_from_res(struct ocfs2_suballoc_result *res) 72b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh{ 73b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh if (res->sr_blkno == 0) 74b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh return 0; 75b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh 76b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh if (res->sr_bg_blkno) 77b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh return res->sr_bg_blkno; 78b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh 79b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh return ocfs2_which_suballoc_group(res->sr_blkno, res->sr_bit_offset); 80b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh} 81b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh 82ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline void ocfs2_debug_bg(struct ocfs2_group_desc *bg); 83ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline void ocfs2_debug_suballoc_inode(struct ocfs2_dinode *fe); 84ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline u16 ocfs2_find_victim_chain(struct ocfs2_chain_list *cl); 851fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fashehstatic int ocfs2_block_group_fill(handle_t *handle, 86ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode, 87ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *bg_bh, 88ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 group_blkno, 89798db35f4649eac2778381c390ed7d12de9ec767Joel Becker unsigned int group_clusters, 90ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 my_chain, 91ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_chain_list *cl); 92ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_block_group_alloc(struct ocfs2_super *osb, 93ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode, 941187c968852e3c668f3b9376083851f81f6eee22Joel Becker struct buffer_head *bh, 9560ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma u64 max_block, 96feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma u64 *last_alloc_group, 9760ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma int flags); 98ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 99ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_cluster_group_search(struct inode *inode, 100ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh, 101ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, u32 min_bits, 1021187c968852e3c668f3b9376083851f81f6eee22Joel Becker u64 max_block, 1037d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res); 104ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_block_group_search(struct inode *inode, 105ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh, 106ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, u32 min_bits, 1071187c968852e3c668f3b9376083851f81f6eee22Joel Becker u64 max_block, 1087d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res); 109aa8f8e93c898a0319bcd6c79a9a42fe52abac7d7Joel Beckerstatic int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *ac, 1101fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fasheh handle_t *handle, 111ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, 112ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 min_bits, 1137d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res); 114ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_test_bg_bit_allocatable(struct buffer_head *bg_bh, 115ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int nr); 1161fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fashehstatic inline int ocfs2_block_group_set_bits(handle_t *handle, 117ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode, 118ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg, 119ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh, 120ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh unsigned int bit_off, 121ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh unsigned int num_bits); 1221fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fashehstatic int ocfs2_relink_block_group(handle_t *handle, 123ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode, 124ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *fe_bh, 125ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *bg_bh, 126ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *prev_bg_bh, 127ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 chain); 128ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg, 129ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 wanted); 130ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline u32 ocfs2_desc_bitmap_to_cluster_off(struct inode *inode, 131ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 bg_blkno, 132ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 bg_bit_off); 133ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline void ocfs2_block_to_cluster_group(struct inode *inode, 134ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 data_blkno, 135ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 *bg_blkno, 136ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 *bg_bit_off); 1371187c968852e3c668f3b9376083851f81f6eee22Joel Beckerstatic int ocfs2_reserve_clusters_with_limit(struct ocfs2_super *osb, 1381187c968852e3c668f3b9376083851f81f6eee22Joel Becker u32 bits_wanted, u64 max_block, 13960ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma int flags, 1401187c968852e3c668f3b9376083851f81f6eee22Joel Becker struct ocfs2_alloc_context **ac); 141ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1429c7af40b210e87f8fddd97b0badc0a352862234aMark Fashehvoid ocfs2_free_ac_resource(struct ocfs2_alloc_context *ac) 143ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 144da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh struct inode *inode = ac->ac_inode; 145da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh 146da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh if (inode) { 147da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh if (ac->ac_which != OCFS2_AC_USE_LOCAL) 148e63aecb651ba73dffc62f9608ee1b7ae2a0ffd4bMark Fasheh ocfs2_inode_unlock(inode, 1); 149da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh 150da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh mutex_unlock(&inode->i_mutex); 151da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh 152da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh iput(inode); 1534d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma ac->ac_inode = NULL; 154da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh } 155a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh brelse(ac->ac_bh); 156a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh ac->ac_bh = NULL; 157e3b4a97dbe9741a3227c3ed857a0632532fcd386Mark Fasheh ac->ac_resv = NULL; 158e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (ac->ac_find_loc_priv) { 159e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh kfree(ac->ac_find_loc_priv); 160e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ac->ac_find_loc_priv = NULL; 161e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh } 1624d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma} 1634d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma 1644d0ddb2ce25db2254d468233d942276ecf40bff8Tao Mavoid ocfs2_free_alloc_context(struct ocfs2_alloc_context *ac) 1654d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma{ 1664d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma ocfs2_free_ac_resource(ac); 167ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh kfree(ac); 168ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 169ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 170ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic u32 ocfs2_bits_per_group(struct ocfs2_chain_list *cl) 171ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 172ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return (u32)le16_to_cpu(cl->cl_cpg) * (u32)le16_to_cpu(cl->cl_bpc); 173ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 174ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 17557e3e7971136003c96766346049aa73b82cab079Joel Becker#define do_error(fmt, ...) \ 17657e3e7971136003c96766346049aa73b82cab079Joel Becker do{ \ 17778c37eb0d5e6a9727b12ea0f1821795ffaa66cfeTao Ma if (resize) \ 17857e3e7971136003c96766346049aa73b82cab079Joel Becker mlog(ML_ERROR, fmt "\n", ##__VA_ARGS__); \ 17957e3e7971136003c96766346049aa73b82cab079Joel Becker else \ 18057e3e7971136003c96766346049aa73b82cab079Joel Becker ocfs2_error(sb, fmt, ##__VA_ARGS__); \ 18157e3e7971136003c96766346049aa73b82cab079Joel Becker } while (0) 18257e3e7971136003c96766346049aa73b82cab079Joel Becker 183970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Beckerstatic int ocfs2_validate_gd_self(struct super_block *sb, 184970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker struct buffer_head *bh, 18578c37eb0d5e6a9727b12ea0f1821795ffaa66cfeTao Ma int resize) 186970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker{ 187970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; 188970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker 1897bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh if (!OCFS2_IS_VALID_GROUP_DESC(gd)) { 19068f64d471be38631d7196b938d9809802dd467faJoel Becker do_error("Group descriptor #%llu has bad signature %.*s", 19168f64d471be38631d7196b938d9809802dd467faJoel Becker (unsigned long long)bh->b_blocknr, 7, 19257e3e7971136003c96766346049aa73b82cab079Joel Becker gd->bg_signature); 19357e3e7971136003c96766346049aa73b82cab079Joel Becker return -EINVAL; 1947bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh } 1957bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh 19668f64d471be38631d7196b938d9809802dd467faJoel Becker if (le64_to_cpu(gd->bg_blkno) != bh->b_blocknr) { 19768f64d471be38631d7196b938d9809802dd467faJoel Becker do_error("Group descriptor #%llu has an invalid bg_blkno " 19868f64d471be38631d7196b938d9809802dd467faJoel Becker "of %llu", 19968f64d471be38631d7196b938d9809802dd467faJoel Becker (unsigned long long)bh->b_blocknr, 20068f64d471be38631d7196b938d9809802dd467faJoel Becker (unsigned long long)le64_to_cpu(gd->bg_blkno)); 20168f64d471be38631d7196b938d9809802dd467faJoel Becker return -EINVAL; 20268f64d471be38631d7196b938d9809802dd467faJoel Becker } 20368f64d471be38631d7196b938d9809802dd467faJoel Becker 20468f64d471be38631d7196b938d9809802dd467faJoel Becker if (le32_to_cpu(gd->bg_generation) != OCFS2_SB(sb)->fs_generation) { 20568f64d471be38631d7196b938d9809802dd467faJoel Becker do_error("Group descriptor #%llu has an invalid " 20668f64d471be38631d7196b938d9809802dd467faJoel Becker "fs_generation of #%u", 20768f64d471be38631d7196b938d9809802dd467faJoel Becker (unsigned long long)bh->b_blocknr, 20868f64d471be38631d7196b938d9809802dd467faJoel Becker le32_to_cpu(gd->bg_generation)); 20968f64d471be38631d7196b938d9809802dd467faJoel Becker return -EINVAL; 21068f64d471be38631d7196b938d9809802dd467faJoel Becker } 21168f64d471be38631d7196b938d9809802dd467faJoel Becker 212970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker if (le16_to_cpu(gd->bg_free_bits_count) > le16_to_cpu(gd->bg_bits)) { 213970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker do_error("Group descriptor #%llu has bit count %u but " 214970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker "claims that %u are free", 215970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker (unsigned long long)bh->b_blocknr, 216970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker le16_to_cpu(gd->bg_bits), 217970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker le16_to_cpu(gd->bg_free_bits_count)); 218970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker return -EINVAL; 219970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker } 220970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker 221970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker if (le16_to_cpu(gd->bg_bits) > (8 * le16_to_cpu(gd->bg_size))) { 222970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker do_error("Group descriptor #%llu has bit count %u but " 223970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker "max bitmap bits of %u", 224970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker (unsigned long long)bh->b_blocknr, 225970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker le16_to_cpu(gd->bg_bits), 226970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker 8 * le16_to_cpu(gd->bg_size)); 227970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker return -EINVAL; 228970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker } 229970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker 230970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker return 0; 231970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker} 232970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker 233970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Beckerstatic int ocfs2_validate_gd_parent(struct super_block *sb, 234970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker struct ocfs2_dinode *di, 235970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker struct buffer_head *bh, 23678c37eb0d5e6a9727b12ea0f1821795ffaa66cfeTao Ma int resize) 237970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker{ 238970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker unsigned int max_bits; 239970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; 240970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker 2417bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh if (di->i_blkno != gd->bg_parent_dinode) { 24268f64d471be38631d7196b938d9809802dd467faJoel Becker do_error("Group descriptor #%llu has bad parent " 24357e3e7971136003c96766346049aa73b82cab079Joel Becker "pointer (%llu, expected %llu)", 24468f64d471be38631d7196b938d9809802dd467faJoel Becker (unsigned long long)bh->b_blocknr, 24557e3e7971136003c96766346049aa73b82cab079Joel Becker (unsigned long long)le64_to_cpu(gd->bg_parent_dinode), 24657e3e7971136003c96766346049aa73b82cab079Joel Becker (unsigned long long)le64_to_cpu(di->i_blkno)); 24757e3e7971136003c96766346049aa73b82cab079Joel Becker return -EINVAL; 2487bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh } 2497bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh 2507bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh max_bits = le16_to_cpu(di->id2.i_chain.cl_cpg) * le16_to_cpu(di->id2.i_chain.cl_bpc); 2517bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh if (le16_to_cpu(gd->bg_bits) > max_bits) { 25268f64d471be38631d7196b938d9809802dd467faJoel Becker do_error("Group descriptor #%llu has bit count of %u", 25368f64d471be38631d7196b938d9809802dd467faJoel Becker (unsigned long long)bh->b_blocknr, 25457e3e7971136003c96766346049aa73b82cab079Joel Becker le16_to_cpu(gd->bg_bits)); 25557e3e7971136003c96766346049aa73b82cab079Joel Becker return -EINVAL; 2567bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh } 2577bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh 25878c37eb0d5e6a9727b12ea0f1821795ffaa66cfeTao Ma /* In resize, we may meet the case bg_chain == cl_next_free_rec. */ 25978c37eb0d5e6a9727b12ea0f1821795ffaa66cfeTao Ma if ((le16_to_cpu(gd->bg_chain) > 26078c37eb0d5e6a9727b12ea0f1821795ffaa66cfeTao Ma le16_to_cpu(di->id2.i_chain.cl_next_free_rec)) || 26178c37eb0d5e6a9727b12ea0f1821795ffaa66cfeTao Ma ((le16_to_cpu(gd->bg_chain) == 26278c37eb0d5e6a9727b12ea0f1821795ffaa66cfeTao Ma le16_to_cpu(di->id2.i_chain.cl_next_free_rec)) && !resize)) { 26368f64d471be38631d7196b938d9809802dd467faJoel Becker do_error("Group descriptor #%llu has bad chain %u", 26468f64d471be38631d7196b938d9809802dd467faJoel Becker (unsigned long long)bh->b_blocknr, 26557e3e7971136003c96766346049aa73b82cab079Joel Becker le16_to_cpu(gd->bg_chain)); 26657e3e7971136003c96766346049aa73b82cab079Joel Becker return -EINVAL; 2677bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh } 2687bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh 269970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker return 0; 270970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker} 2717bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh 27257e3e7971136003c96766346049aa73b82cab079Joel Becker#undef do_error 2737bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh 274970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker/* 275970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker * This version only prints errors. It does not fail the filesystem, and 276970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker * exists only for resize. 277970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker */ 278970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Beckerint ocfs2_check_group_descriptor(struct super_block *sb, 279970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker struct ocfs2_dinode *di, 280970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker struct buffer_head *bh) 281970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker{ 282970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker int rc; 283d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; 284d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker 285d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker BUG_ON(!buffer_uptodate(bh)); 286970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker 287d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker /* 288d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker * If the ecc fails, we return the error but otherwise 289d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker * leave the filesystem running. We know any error is 290d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker * local to this block. 291d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker */ 292d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &gd->bg_check); 29313723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker if (rc) { 29413723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker mlog(ML_ERROR, 29513723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker "Checksum failed for group descriptor %llu\n", 29613723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker (unsigned long long)bh->b_blocknr); 29713723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker } else 298d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker rc = ocfs2_validate_gd_self(sb, bh, 1); 299970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker if (!rc) 300970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker rc = ocfs2_validate_gd_parent(sb, di, bh, 1); 301970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker 302970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker return rc; 303970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker} 304970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker 305970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Beckerstatic int ocfs2_validate_group_descriptor(struct super_block *sb, 306970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker struct buffer_head *bh) 307970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker{ 308d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker int rc; 309d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; 310d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker 311970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker mlog(0, "Validating group descriptor %llu\n", 312970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker (unsigned long long)bh->b_blocknr); 313970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker 314d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker BUG_ON(!buffer_uptodate(bh)); 315d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker 316d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker /* 317d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker * If the ecc fails, we return the error but otherwise 318d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker * leave the filesystem running. We know any error is 319d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker * local to this block. 320d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker */ 321d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &gd->bg_check); 322d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker if (rc) 323d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker return rc; 324d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker 325d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker /* 326d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker * Errors after here are fatal. 327d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker */ 328d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker 329970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker return ocfs2_validate_gd_self(sb, bh, 0); 3307bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh} 3317bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh 33268f64d471be38631d7196b938d9809802dd467faJoel Beckerint ocfs2_read_group_descriptor(struct inode *inode, struct ocfs2_dinode *di, 33368f64d471be38631d7196b938d9809802dd467faJoel Becker u64 gd_blkno, struct buffer_head **bh) 33468f64d471be38631d7196b938d9809802dd467faJoel Becker{ 33568f64d471be38631d7196b938d9809802dd467faJoel Becker int rc; 33668f64d471be38631d7196b938d9809802dd467faJoel Becker struct buffer_head *tmp = *bh; 33768f64d471be38631d7196b938d9809802dd467faJoel Becker 3388cb471e8f82506937fe5e2e9fb0bf90f6b1f1170Joel Becker rc = ocfs2_read_block(INODE_CACHE(inode), gd_blkno, &tmp, 339970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker ocfs2_validate_group_descriptor); 34068f64d471be38631d7196b938d9809802dd467faJoel Becker if (rc) 34168f64d471be38631d7196b938d9809802dd467faJoel Becker goto out; 34268f64d471be38631d7196b938d9809802dd467faJoel Becker 343970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker rc = ocfs2_validate_gd_parent(inode->i_sb, di, tmp, 0); 34468f64d471be38631d7196b938d9809802dd467faJoel Becker if (rc) { 34568f64d471be38631d7196b938d9809802dd467faJoel Becker brelse(tmp); 34668f64d471be38631d7196b938d9809802dd467faJoel Becker goto out; 34768f64d471be38631d7196b938d9809802dd467faJoel Becker } 34868f64d471be38631d7196b938d9809802dd467faJoel Becker 34968f64d471be38631d7196b938d9809802dd467faJoel Becker /* If ocfs2_read_block() got us a new bh, pass it up. */ 35068f64d471be38631d7196b938d9809802dd467faJoel Becker if (!*bh) 35168f64d471be38631d7196b938d9809802dd467faJoel Becker *bh = tmp; 35268f64d471be38631d7196b938d9809802dd467faJoel Becker 35368f64d471be38631d7196b938d9809802dd467faJoel Beckerout: 35468f64d471be38631d7196b938d9809802dd467faJoel Becker return rc; 35568f64d471be38631d7196b938d9809802dd467faJoel Becker} 35668f64d471be38631d7196b938d9809802dd467faJoel Becker 357798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerstatic void ocfs2_bg_discontig_add_extent(struct ocfs2_super *osb, 358798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_group_desc *bg, 359798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_chain_list *cl, 36047dea423799d98c53793237ab386a94976f305d5Tao Ma u64 p_blkno, unsigned int clusters) 361798db35f4649eac2778381c390ed7d12de9ec767Joel Becker{ 362798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_extent_list *el = &bg->bg_list; 363798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_extent_rec *rec; 364798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 3654711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma BUG_ON(!ocfs2_supports_discontig_bg(osb)); 366798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (!el->l_next_free_rec) 367798db35f4649eac2778381c390ed7d12de9ec767Joel Becker el->l_count = cpu_to_le16(ocfs2_extent_recs_per_gd(osb->sb)); 368798db35f4649eac2778381c390ed7d12de9ec767Joel Becker rec = &el->l_recs[le16_to_cpu(el->l_next_free_rec)]; 3694711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma rec->e_blkno = cpu_to_le64(p_blkno); 370798db35f4649eac2778381c390ed7d12de9ec767Joel Becker rec->e_cpos = cpu_to_le32(le16_to_cpu(bg->bg_bits) / 371798db35f4649eac2778381c390ed7d12de9ec767Joel Becker le16_to_cpu(cl->cl_bpc)); 37247dea423799d98c53793237ab386a94976f305d5Tao Ma rec->e_leaf_clusters = cpu_to_le16(clusters); 373798db35f4649eac2778381c390ed7d12de9ec767Joel Becker le16_add_cpu(&bg->bg_bits, clusters * le16_to_cpu(cl->cl_bpc)); 3744711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma le16_add_cpu(&bg->bg_free_bits_count, 3754711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma clusters * le16_to_cpu(cl->cl_bpc)); 376798db35f4649eac2778381c390ed7d12de9ec767Joel Becker le16_add_cpu(&el->l_next_free_rec, 1); 377798db35f4649eac2778381c390ed7d12de9ec767Joel Becker} 378798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 3791fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fashehstatic int ocfs2_block_group_fill(handle_t *handle, 380ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode, 381ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *bg_bh, 382ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 group_blkno, 383798db35f4649eac2778381c390ed7d12de9ec767Joel Becker unsigned int group_clusters, 384ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 my_chain, 385ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_chain_list *cl) 386ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 387ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status = 0; 388798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); 389ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; 390ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct super_block * sb = alloc_inode->i_sb; 391ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 392ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 393ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 394ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (((unsigned long long) bg_bh->b_blocknr) != group_blkno) { 395b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh ocfs2_error(alloc_inode->i_sb, "group block (%llu) != " 396b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh "b_blocknr (%llu)", 397b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)group_blkno, 398ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (unsigned long long) bg_bh->b_blocknr); 399ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -EIO; 400ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 401ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 402ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 40313723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker status = ocfs2_journal_access_gd(handle, 4040cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker INODE_CACHE(alloc_inode), 40513723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker bg_bh, 40613723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker OCFS2_JOURNAL_ACCESS_CREATE); 407ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 408ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 409ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 410ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 411ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 412ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh memset(bg, 0, sb->s_blocksize); 413ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh strcpy(bg->bg_signature, OCFS2_GROUP_DESC_SIGNATURE); 414ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_generation = cpu_to_le32(OCFS2_SB(sb)->fs_generation); 4158571882c21e5073b2f96147ec4ff9b7042339e1bTao Ma bg->bg_size = cpu_to_le16(ocfs2_group_bitmap_size(sb, 1, 4168571882c21e5073b2f96147ec4ff9b7042339e1bTao Ma osb->s_feature_incompat)); 417ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_chain = cpu_to_le16(my_chain); 418ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_next_group = cl->cl_recs[my_chain].c_blkno; 419ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_parent_dinode = cpu_to_le64(OCFS2_I(alloc_inode)->ip_blkno); 420ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_blkno = cpu_to_le64(group_blkno); 421798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (group_clusters == le16_to_cpu(cl->cl_cpg)) 422798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg->bg_bits = cpu_to_le16(ocfs2_bits_per_group(cl)); 423798db35f4649eac2778381c390ed7d12de9ec767Joel Becker else 4244711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma ocfs2_bg_discontig_add_extent(osb, bg, cl, group_blkno, 425798db35f4649eac2778381c390ed7d12de9ec767Joel Becker group_clusters); 426798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 427ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* set the 1st bit in the bitmap to account for the descriptor block */ 428ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_set_bit(0, (unsigned long *)bg->bg_bitmap); 429ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_free_bits_count = cpu_to_le16(le16_to_cpu(bg->bg_bits) - 1); 430ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 431ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, bg_bh); 432ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 433ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* There is no need to zero out or otherwise initialize the 434ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * other blocks in a group - All valid FS metadata in a block 435ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * group stores the superblock fs_generation value at 436ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * allocation time. */ 437ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 438ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 439ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 440ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 441ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 442ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 443ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline u16 ocfs2_find_smallest_chain(struct ocfs2_chain_list *cl) 444ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 445ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 curr, best; 446ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 447ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh best = curr = 0; 448ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh while (curr < le16_to_cpu(cl->cl_count)) { 449ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (le32_to_cpu(cl->cl_recs[best].c_total) > 450ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(cl->cl_recs[curr].c_total)) 451ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh best = curr; 452ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh curr++; 453ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 454ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return best; 455ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 456ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 457798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerstatic struct buffer_head * 458798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerocfs2_block_group_alloc_contig(struct ocfs2_super *osb, handle_t *handle, 459798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct inode *alloc_inode, 460798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_alloc_context *ac, 461798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_chain_list *cl) 462798db35f4649eac2778381c390ed7d12de9ec767Joel Becker{ 463798db35f4649eac2778381c390ed7d12de9ec767Joel Becker int status; 464798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u32 bit_off, num_bits; 465798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u64 bg_blkno; 466798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct buffer_head *bg_bh; 467798db35f4649eac2778381c390ed7d12de9ec767Joel Becker unsigned int alloc_rec = ocfs2_find_smallest_chain(cl); 468798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 4691ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Becker status = ocfs2_claim_clusters(handle, ac, 470798db35f4649eac2778381c390ed7d12de9ec767Joel Becker le16_to_cpu(cl->cl_cpg), &bit_off, 471798db35f4649eac2778381c390ed7d12de9ec767Joel Becker &num_bits); 472798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status < 0) { 473798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status != -ENOSPC) 474798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 475798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 476798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 477798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 478798db35f4649eac2778381c390ed7d12de9ec767Joel Becker /* setup the group */ 479798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_blkno = ocfs2_clusters_to_blocks(osb->sb, bit_off); 480798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog(0, "new descriptor, record %u, at block %llu\n", 481798db35f4649eac2778381c390ed7d12de9ec767Joel Becker alloc_rec, (unsigned long long)bg_blkno); 482798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 483798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh = sb_getblk(osb->sb, bg_blkno); 484798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (!bg_bh) { 485798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = -EIO; 486798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 487798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 488798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 489798db35f4649eac2778381c390ed7d12de9ec767Joel Becker ocfs2_set_new_buffer_uptodate(INODE_CACHE(alloc_inode), bg_bh); 490798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 491798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = ocfs2_block_group_fill(handle, alloc_inode, bg_bh, 492798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_blkno, num_bits, alloc_rec, cl); 493798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status < 0) { 494798db35f4649eac2778381c390ed7d12de9ec767Joel Becker brelse(bg_bh); 495798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 496798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 497798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 498798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerbail: 499798db35f4649eac2778381c390ed7d12de9ec767Joel Becker return status ? ERR_PTR(status) : bg_bh; 500798db35f4649eac2778381c390ed7d12de9ec767Joel Becker} 501798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 502798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerstatic int ocfs2_block_group_claim_bits(struct ocfs2_super *osb, 503798db35f4649eac2778381c390ed7d12de9ec767Joel Becker handle_t *handle, 504798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_alloc_context *ac, 505798db35f4649eac2778381c390ed7d12de9ec767Joel Becker unsigned int min_bits, 506798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u32 *bit_off, u32 *num_bits) 507798db35f4649eac2778381c390ed7d12de9ec767Joel Becker{ 50818d3a98f3c1b0e27ce026afa4d1ef042f2903726Joel Becker int status = 0; 509798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 510798db35f4649eac2778381c390ed7d12de9ec767Joel Becker while (min_bits) { 5111ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Becker status = ocfs2_claim_clusters(handle, ac, min_bits, 512798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bit_off, num_bits); 513798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status != -ENOSPC) 514798db35f4649eac2778381c390ed7d12de9ec767Joel Becker break; 515798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 516798db35f4649eac2778381c390ed7d12de9ec767Joel Becker min_bits >>= 1; 517798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 518798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 519798db35f4649eac2778381c390ed7d12de9ec767Joel Becker return status; 520798db35f4649eac2778381c390ed7d12de9ec767Joel Becker} 521798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 522798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerstatic int ocfs2_block_group_grow_discontig(handle_t *handle, 523798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct inode *alloc_inode, 524798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct buffer_head *bg_bh, 525798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_alloc_context *ac, 526798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_chain_list *cl, 527798db35f4649eac2778381c390ed7d12de9ec767Joel Becker unsigned int min_bits) 528798db35f4649eac2778381c390ed7d12de9ec767Joel Becker{ 529798db35f4649eac2778381c390ed7d12de9ec767Joel Becker int status; 530798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); 531798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_group_desc *bg = 532798db35f4649eac2778381c390ed7d12de9ec767Joel Becker (struct ocfs2_group_desc *)bg_bh->b_data; 5334711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma unsigned int needed = le16_to_cpu(cl->cl_cpg) - 5344711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma le16_to_cpu(bg->bg_bits) / le16_to_cpu(cl->cl_bpc); 535798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u32 p_cpos, clusters; 536798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u64 p_blkno; 537798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_extent_list *el = &bg->bg_list; 538798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 539798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = ocfs2_journal_access_gd(handle, 540798db35f4649eac2778381c390ed7d12de9ec767Joel Becker INODE_CACHE(alloc_inode), 541798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh, 542798db35f4649eac2778381c390ed7d12de9ec767Joel Becker OCFS2_JOURNAL_ACCESS_CREATE); 543798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status < 0) { 544798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 545798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 546798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 547798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 548798db35f4649eac2778381c390ed7d12de9ec767Joel Becker while ((needed > 0) && (le16_to_cpu(el->l_next_free_rec) < 549798db35f4649eac2778381c390ed7d12de9ec767Joel Becker le16_to_cpu(el->l_count))) { 550798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (min_bits > needed) 551798db35f4649eac2778381c390ed7d12de9ec767Joel Becker min_bits = needed; 552798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = ocfs2_block_group_claim_bits(osb, handle, ac, 553798db35f4649eac2778381c390ed7d12de9ec767Joel Becker min_bits, &p_cpos, 554798db35f4649eac2778381c390ed7d12de9ec767Joel Becker &clusters); 555798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status < 0) { 556798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status != -ENOSPC) 557798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 558798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 559798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 560798db35f4649eac2778381c390ed7d12de9ec767Joel Becker p_blkno = ocfs2_clusters_to_blocks(osb->sb, p_cpos); 561798db35f4649eac2778381c390ed7d12de9ec767Joel Becker ocfs2_bg_discontig_add_extent(osb, bg, cl, p_blkno, 562798db35f4649eac2778381c390ed7d12de9ec767Joel Becker clusters); 563798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 564798db35f4649eac2778381c390ed7d12de9ec767Joel Becker min_bits = clusters; 5654711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma needed = le16_to_cpu(cl->cl_cpg) - 5664711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma le16_to_cpu(bg->bg_bits) / le16_to_cpu(cl->cl_bpc); 567798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 568798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 569798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (needed > 0) { 5704711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma /* 5714711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma * We have used up all the extent rec but can't fill up 5724711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma * the cpg. So bail out. 5734711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma */ 5744711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma status = -ENOSPC; 5754711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma goto bail; 576798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 577798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 578798db35f4649eac2778381c390ed7d12de9ec767Joel Becker ocfs2_journal_dirty(handle, bg_bh); 579798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 580798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerbail: 581798db35f4649eac2778381c390ed7d12de9ec767Joel Becker return status; 582798db35f4649eac2778381c390ed7d12de9ec767Joel Becker} 583798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 5848b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Beckerstatic void ocfs2_bg_alloc_cleanup(handle_t *handle, 5858b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker struct ocfs2_alloc_context *cluster_ac, 5868b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker struct inode *alloc_inode, 5878b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker struct buffer_head *bg_bh) 588798db35f4649eac2778381c390ed7d12de9ec767Joel Becker{ 5898b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker int i, ret; 590798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_group_desc *bg; 591798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_extent_list *el; 592798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_extent_rec *rec; 593798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 594798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (!bg_bh) 595798db35f4649eac2778381c390ed7d12de9ec767Joel Becker return; 596798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 597798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg = (struct ocfs2_group_desc *)bg_bh->b_data; 598798db35f4649eac2778381c390ed7d12de9ec767Joel Becker el = &bg->bg_list; 599798db35f4649eac2778381c390ed7d12de9ec767Joel Becker for (i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) { 600798db35f4649eac2778381c390ed7d12de9ec767Joel Becker rec = &el->l_recs[i]; 6018b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker ret = ocfs2_free_clusters(handle, cluster_ac->ac_inode, 6028b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker cluster_ac->ac_bh, 6038b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker le64_to_cpu(rec->e_blkno), 6048b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker le32_to_cpu(rec->e_leaf_clusters)); 6058b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker if (ret) 6068b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker mlog_errno(ret); 6078b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker /* Try all the clusters to free */ 608798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 609798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 610798db35f4649eac2778381c390ed7d12de9ec767Joel Becker ocfs2_remove_from_cache(INODE_CACHE(alloc_inode), bg_bh); 611798db35f4649eac2778381c390ed7d12de9ec767Joel Becker brelse(bg_bh); 612798db35f4649eac2778381c390ed7d12de9ec767Joel Becker} 613798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 614798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerstatic struct buffer_head * 615798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerocfs2_block_group_alloc_discontig(handle_t *handle, 616798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct inode *alloc_inode, 617798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_alloc_context *ac, 6188b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker struct ocfs2_chain_list *cl) 619798db35f4649eac2778381c390ed7d12de9ec767Joel Becker{ 620798db35f4649eac2778381c390ed7d12de9ec767Joel Becker int status; 621798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u32 bit_off, num_bits; 622798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u64 bg_blkno; 623798db35f4649eac2778381c390ed7d12de9ec767Joel Becker unsigned int min_bits = le16_to_cpu(cl->cl_cpg) >> 1; 624798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct buffer_head *bg_bh = NULL; 625798db35f4649eac2778381c390ed7d12de9ec767Joel Becker unsigned int alloc_rec = ocfs2_find_smallest_chain(cl); 626798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); 627798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 6284711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma if (!ocfs2_supports_discontig_bg(osb)) { 629798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = -ENOSPC; 630798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 631798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 632798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 6338b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker status = ocfs2_extend_trans(handle, 6348b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker ocfs2_calc_bg_discontig_credits(osb->sb)); 6358b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker if (status) { 6368b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker mlog_errno(status); 6378b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker goto bail; 6388b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker } 6398b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker 64095ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker /* 64195ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker * We're going to be grabbing from multiple cluster groups. 64295ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker * We don't have enough credits to relink them all, and the 64395ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker * cluster groups will be staying in cache for the duration of 64495ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker * this operation. 64595ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker */ 64695ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker ac->ac_allow_chain_relink = 0; 64795ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker 648798db35f4649eac2778381c390ed7d12de9ec767Joel Becker /* Claim the first region */ 649798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = ocfs2_block_group_claim_bits(osb, handle, ac, min_bits, 650798db35f4649eac2778381c390ed7d12de9ec767Joel Becker &bit_off, &num_bits); 651798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status < 0) { 652798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status != -ENOSPC) 653798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 654798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 655798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 656798db35f4649eac2778381c390ed7d12de9ec767Joel Becker min_bits = num_bits; 657798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 658798db35f4649eac2778381c390ed7d12de9ec767Joel Becker /* setup the group */ 659798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_blkno = ocfs2_clusters_to_blocks(osb->sb, bit_off); 660798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog(0, "new descriptor, record %u, at block %llu\n", 661798db35f4649eac2778381c390ed7d12de9ec767Joel Becker alloc_rec, (unsigned long long)bg_blkno); 662798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 663798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh = sb_getblk(osb->sb, bg_blkno); 664798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (!bg_bh) { 665798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = -EIO; 666798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 667798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 668798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 669798db35f4649eac2778381c390ed7d12de9ec767Joel Becker ocfs2_set_new_buffer_uptodate(INODE_CACHE(alloc_inode), bg_bh); 670798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 671798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = ocfs2_block_group_fill(handle, alloc_inode, bg_bh, 672798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_blkno, num_bits, alloc_rec, cl); 673798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status < 0) { 674798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 675798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 676798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 677798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 678798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = ocfs2_block_group_grow_discontig(handle, alloc_inode, 679798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh, ac, cl, min_bits); 680798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status) 681798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 682798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 683798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerbail: 684798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status) 6858b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker ocfs2_bg_alloc_cleanup(handle, ac, alloc_inode, bg_bh); 686798db35f4649eac2778381c390ed7d12de9ec767Joel Becker return status ? ERR_PTR(status) : bg_bh; 687798db35f4649eac2778381c390ed7d12de9ec767Joel Becker} 688798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 689ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* 690ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * We expect the block group allocator to already be locked. 691ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh */ 692ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_block_group_alloc(struct ocfs2_super *osb, 693ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode, 6941187c968852e3c668f3b9376083851f81f6eee22Joel Becker struct buffer_head *bh, 69560ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma u64 max_block, 696feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma u64 *last_alloc_group, 69760ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma int flags) 698ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 699ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status, credits; 700ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data; 701ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_chain_list *cl; 702ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_alloc_context *ac = NULL; 7031fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fasheh handle_t *handle = NULL; 7044711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma u16 alloc_rec; 705ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *bg_bh = NULL; 706ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg; 707ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 708ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ocfs2_is_cluster_bitmap(alloc_inode)); 709ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 710ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 711ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 712ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh cl = &fe->id2.i_chain; 7131187c968852e3c668f3b9376083851f81f6eee22Joel Becker status = ocfs2_reserve_clusters_with_limit(osb, 7141187c968852e3c668f3b9376083851f81f6eee22Joel Becker le16_to_cpu(cl->cl_cpg), 71560ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma max_block, flags, &ac); 716ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 717ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 718ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 719ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 720ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 721ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 722ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh credits = ocfs2_calc_group_alloc_credits(osb->sb, 723ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le16_to_cpu(cl->cl_cpg)); 72465eff9ccf86d63eb5c3e9071450a36e4e4fa9564Mark Fasheh handle = ocfs2_start_trans(osb, credits); 725ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (IS_ERR(handle)) { 726ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = PTR_ERR(handle); 727ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh handle = NULL; 728ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 729ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 730ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 731ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 732feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma if (last_alloc_group && *last_alloc_group != 0) { 733feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma mlog(0, "use old allocation group %llu for block group alloc\n", 734feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma (unsigned long long)*last_alloc_group); 735feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma ac->ac_last_group = *last_alloc_group; 736feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma } 737798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 738798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh = ocfs2_block_group_alloc_contig(osb, handle, alloc_inode, 739798db35f4649eac2778381c390ed7d12de9ec767Joel Becker ac, cl); 740798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (IS_ERR(bg_bh) && (PTR_ERR(bg_bh) == -ENOSPC)) 741798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh = ocfs2_block_group_alloc_discontig(handle, 742798db35f4649eac2778381c390ed7d12de9ec767Joel Becker alloc_inode, 7438b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker ac, cl); 744798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (IS_ERR(bg_bh)) { 745798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = PTR_ERR(bg_bh); 746798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh = NULL; 747ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 748ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 749ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 750ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 751ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg = (struct ocfs2_group_desc *) bg_bh->b_data; 752ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 7530cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), 75413723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker bh, OCFS2_JOURNAL_ACCESS_WRITE); 755ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 756ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 757ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 758ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 759ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 7604711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma alloc_rec = le16_to_cpu(bg->bg_chain); 7614711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma le32_add_cpu(&cl->cl_recs[alloc_rec].c_free, 762ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le16_to_cpu(bg->bg_free_bits_count)); 7634711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma le32_add_cpu(&cl->cl_recs[alloc_rec].c_total, 764798db35f4649eac2778381c390ed7d12de9ec767Joel Becker le16_to_cpu(bg->bg_bits)); 7650a463b74e7e6856b24e613de2b85237c6e11890bTao Ma cl->cl_recs[alloc_rec].c_blkno = bg->bg_blkno; 766ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (le16_to_cpu(cl->cl_next_free_rec) < le16_to_cpu(cl->cl_count)) 767ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le16_add_cpu(&cl->cl_next_free_rec, 1); 768ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 769ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_add_cpu(&fe->id1.bitmap1.i_used, le16_to_cpu(bg->bg_bits) - 770ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le16_to_cpu(bg->bg_free_bits_count)); 771ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_add_cpu(&fe->id1.bitmap1.i_total, le16_to_cpu(bg->bg_bits)); 772ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_add_cpu(&fe->i_clusters, le16_to_cpu(cl->cl_cpg)); 773ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 774ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, bh); 775ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 776ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh spin_lock(&OCFS2_I(alloc_inode)->ip_lock); 777ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh OCFS2_I(alloc_inode)->ip_clusters = le32_to_cpu(fe->i_clusters); 778ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe->i_size = cpu_to_le64(ocfs2_clusters_to_bytes(alloc_inode->i_sb, 779ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->i_clusters))); 780ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh spin_unlock(&OCFS2_I(alloc_inode)->ip_lock); 781ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh i_size_write(alloc_inode, le64_to_cpu(fe->i_size)); 7828110b073a9135acf0a71bccfc20c0d1023f179c6Mark Fasheh alloc_inode->i_blocks = ocfs2_inode_sector_count(alloc_inode); 783ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 784ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = 0; 785feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma 786feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma /* save the new last alloc group so that the caller can cache it. */ 787feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma if (last_alloc_group) 788feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma *last_alloc_group = ac->ac_last_group; 789feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma 790ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 791ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (handle) 79202dc1af44e9fa4b8801169891b3a1ba4047537adMark Fasheh ocfs2_commit_trans(osb, handle); 793ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 794ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (ac) 795ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_free_alloc_context(ac); 796ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 797a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh brelse(bg_bh); 798ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 799ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 800ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 801ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 802ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 803ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_reserve_suballoc_bits(struct ocfs2_super *osb, 804da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh struct ocfs2_alloc_context *ac, 805da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh int type, 806ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma u32 slot, 807feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma u64 *last_alloc_group, 80860ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma int flags) 809ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 810ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 811ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted = ac->ac_bits_wanted; 812da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh struct inode *alloc_inode; 813ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *bh = NULL; 814ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe; 815ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 free_bits; 816ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 817ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 818ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 819da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh alloc_inode = ocfs2_get_system_file_inode(osb, type, slot); 820da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh if (!alloc_inode) { 821da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh mlog_errno(-EINVAL); 822da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh return -EINVAL; 823da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh } 824ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 825da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh mutex_lock(&alloc_inode->i_mutex); 826da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh 827e63aecb651ba73dffc62f9608ee1b7ae2a0ffd4bMark Fasheh status = ocfs2_inode_lock(alloc_inode, &bh, 1); 828ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 829da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh mutex_unlock(&alloc_inode->i_mutex); 830da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh iput(alloc_inode); 831da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh 832ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 833da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh return status; 834ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 835ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 836da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh ac->ac_inode = alloc_inode; 837a4a4891164d4f6f383cc17e7c90828a7ca6a1146Tao Ma ac->ac_alloc_slot = slot; 838da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh 839ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe = (struct ocfs2_dinode *) bh->b_data; 84010995aa2451afa20b721cc7de856cae1a13dba57Joel Becker 84110995aa2451afa20b721cc7de856cae1a13dba57Joel Becker /* The bh was validated by the inode read inside 84210995aa2451afa20b721cc7de856cae1a13dba57Joel Becker * ocfs2_inode_lock(). Any corruption is a code bug. */ 84310995aa2451afa20b721cc7de856cae1a13dba57Joel Becker BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); 84410995aa2451afa20b721cc7de856cae1a13dba57Joel Becker 845ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!(fe->i_flags & cpu_to_le32(OCFS2_CHAIN_FL))) { 846b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh ocfs2_error(alloc_inode->i_sb, "Invalid chain allocator %llu", 847b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)le64_to_cpu(fe->i_blkno)); 848ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -EIO; 849ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 850ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 851ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 852ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh free_bits = le32_to_cpu(fe->id1.bitmap1.i_total) - 853ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->id1.bitmap1.i_used); 854ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 855ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (bits_wanted > free_bits) { 856ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* cluster bitmap never grows */ 857ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (ocfs2_is_cluster_bitmap(alloc_inode)) { 858ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog(0, "Disk Full: wanted=%u, free_bits=%u\n", 859ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bits_wanted, free_bits); 860ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOSPC; 861ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 862ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 863ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 86460ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma if (!(flags & ALLOC_NEW_GROUP)) { 865ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma mlog(0, "Alloc File %u Full: wanted=%u, free_bits=%u, " 866ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma "and we don't alloc a new group for it.\n", 867ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma slot, bits_wanted, free_bits); 868ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma status = -ENOSPC; 869ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma goto bail; 870ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma } 871ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma 8721187c968852e3c668f3b9376083851f81f6eee22Joel Becker status = ocfs2_block_group_alloc(osb, alloc_inode, bh, 873feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma ac->ac_max_block, 874feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma last_alloc_group, flags); 875ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 876ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 877ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 878ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 879ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 880ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh atomic_inc(&osb->alloc_stats.bg_extends); 881ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 882ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* You should never ask for this much metadata */ 883ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(bits_wanted > 884ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (le32_to_cpu(fe->id1.bitmap1.i_total) 885ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh - le32_to_cpu(fe->id1.bitmap1.i_used))); 886ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 887ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 888ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh get_bh(bh); 889ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_bh = bh; 890ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 891a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh brelse(bh); 892ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 893ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 894ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 895ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 896ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 897b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb) 898b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 899b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_lock(&osb->osb_lock); 900b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang osb->s_inode_steal_slot = OCFS2_INVALID_SLOT; 901b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_unlock(&osb->osb_lock); 902b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang atomic_set(&osb->s_num_inodes_stolen, 0); 903b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 904b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 905b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic void ocfs2_init_meta_steal_slot(struct ocfs2_super *osb) 906b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 907b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_lock(&osb->osb_lock); 908b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang osb->s_meta_steal_slot = OCFS2_INVALID_SLOT; 909b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_unlock(&osb->osb_lock); 910b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang atomic_set(&osb->s_num_meta_stolen, 0); 911b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 912b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 913b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangvoid ocfs2_init_steal_slots(struct ocfs2_super *osb) 914b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 915b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang ocfs2_init_inode_steal_slot(osb); 916b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang ocfs2_init_meta_steal_slot(osb); 917b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 918b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 919b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic void __ocfs2_set_steal_slot(struct ocfs2_super *osb, int slot, int type) 920b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 921b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_lock(&osb->osb_lock); 922b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (type == INODE_ALLOC_SYSTEM_INODE) 923b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang osb->s_inode_steal_slot = slot; 924b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang else if (type == EXTENT_ALLOC_SYSTEM_INODE) 925b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang osb->s_meta_steal_slot = slot; 926b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_unlock(&osb->osb_lock); 927b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 928b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 929b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic int __ocfs2_get_steal_slot(struct ocfs2_super *osb, int type) 930b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 931b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang int slot = OCFS2_INVALID_SLOT; 932b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 933b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_lock(&osb->osb_lock); 934b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (type == INODE_ALLOC_SYSTEM_INODE) 935b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang slot = osb->s_inode_steal_slot; 936b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang else if (type == EXTENT_ALLOC_SYSTEM_INODE) 937b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang slot = osb->s_meta_steal_slot; 938b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_unlock(&osb->osb_lock); 939b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 940b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang return slot; 941b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 942b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 943b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic int ocfs2_get_inode_steal_slot(struct ocfs2_super *osb) 944b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 945b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang return __ocfs2_get_steal_slot(osb, INODE_ALLOC_SYSTEM_INODE); 946b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 947b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 948b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic int ocfs2_get_meta_steal_slot(struct ocfs2_super *osb) 949b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 950b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang return __ocfs2_get_steal_slot(osb, EXTENT_ALLOC_SYSTEM_INODE); 951b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 952b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 953b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic int ocfs2_steal_resource(struct ocfs2_super *osb, 954b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang struct ocfs2_alloc_context *ac, 955b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang int type) 956b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 957b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang int i, status = -ENOSPC; 958b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang int slot = __ocfs2_get_steal_slot(osb, type); 959b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 960b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang /* Start to steal resource from the first slot after ours. */ 961b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (slot == OCFS2_INVALID_SLOT) 962b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang slot = osb->slot_num + 1; 963b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 964b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang for (i = 0; i < osb->max_slots; i++, slot++) { 965b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (slot == osb->max_slots) 966b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang slot = 0; 967b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 968b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (slot == osb->slot_num) 969b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang continue; 970b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 971b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang status = ocfs2_reserve_suballoc_bits(osb, ac, 972b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang type, 973b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang (u32)slot, NULL, 974b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang NOT_ALLOC_NEW_GROUP); 975b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (status >= 0) { 976b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang __ocfs2_set_steal_slot(osb, slot, type); 977b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang break; 978b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang } 979b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 980b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang ocfs2_free_ac_resource(ac); 981b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang } 982b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 983b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang return status; 984b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 985b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 986b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic int ocfs2_steal_inode(struct ocfs2_super *osb, 987b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang struct ocfs2_alloc_context *ac) 988b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 989b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang return ocfs2_steal_resource(osb, ac, INODE_ALLOC_SYSTEM_INODE); 990b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 991b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 992b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic int ocfs2_steal_meta(struct ocfs2_super *osb, 993b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang struct ocfs2_alloc_context *ac) 994b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 995b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang return ocfs2_steal_resource(osb, ac, EXTENT_ALLOC_SYSTEM_INODE); 996b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 997b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 998cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yangint ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb, 999cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang int blocks, 1000cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang struct ocfs2_alloc_context **ac) 1001ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1002ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1003b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang int slot = ocfs2_get_meta_steal_slot(osb); 1004ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1005cd86128088554d64fea1679191509f00e6353c5bRobert P. J. Day *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); 1006ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!(*ac)) { 1007ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOMEM; 1008ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1009ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1010ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1011ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1012cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang (*ac)->ac_bits_wanted = blocks; 1013ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (*ac)->ac_which = OCFS2_AC_USE_META; 1014ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (*ac)->ac_group_search = ocfs2_block_group_search; 1015ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1016b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (slot != OCFS2_INVALID_SLOT && 1017b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang atomic_read(&osb->s_num_meta_stolen) < OCFS2_MAX_TO_STEAL) 1018b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang goto extent_steal; 1019b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 1020b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang atomic_set(&osb->s_num_meta_stolen, 0); 1021da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh status = ocfs2_reserve_suballoc_bits(osb, (*ac), 1022ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma EXTENT_ALLOC_SYSTEM_INODE, 1023b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang (u32)osb->slot_num, NULL, 102433d5d380d667ad264675cfdb297dfc3c5b6542ccMark Fasheh ALLOC_GROUPS_FROM_GLOBAL|ALLOC_NEW_GROUP); 1025b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 1026b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 1027b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (status >= 0) { 1028b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang status = 0; 1029b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (slot != OCFS2_INVALID_SLOT) 1030b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang ocfs2_init_meta_steal_slot(osb); 1031b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang goto bail; 1032b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang } else if (status < 0 && status != -ENOSPC) { 1033b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang mlog_errno(status); 1034b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang goto bail; 1035b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang } 1036b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 1037b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang ocfs2_free_ac_resource(*ac); 1038b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 1039b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangextent_steal: 1040b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang status = ocfs2_steal_meta(osb, *ac); 1041b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang atomic_inc(&osb->s_num_meta_stolen); 1042ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1043ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 1044ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1045ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1046ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1047ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1048ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = 0; 1049ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 1050ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if ((status < 0) && *ac) { 1051ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_free_alloc_context(*ac); 1052ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *ac = NULL; 1053ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1054ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1055ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 1056ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1057ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1058ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1059cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yangint ocfs2_reserve_new_metadata(struct ocfs2_super *osb, 1060cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang struct ocfs2_extent_list *root_el, 1061cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang struct ocfs2_alloc_context **ac) 1062cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang{ 1063cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang return ocfs2_reserve_new_metadata_blocks(osb, 1064cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang ocfs2_extend_meta_needed(root_el), 1065cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang ac); 1066cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang} 1067cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang 1068ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehint ocfs2_reserve_new_inode(struct ocfs2_super *osb, 1069ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_alloc_context **ac) 1070ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1071ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1072b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang int slot = ocfs2_get_inode_steal_slot(osb); 1073feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma u64 alloc_group; 1074ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1075cd86128088554d64fea1679191509f00e6353c5bRobert P. J. Day *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); 1076ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!(*ac)) { 1077ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOMEM; 1078ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1079ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1080ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1081ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1082ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (*ac)->ac_bits_wanted = 1; 1083ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (*ac)->ac_which = OCFS2_AC_USE_INODE; 1084ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1085ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (*ac)->ac_group_search = ocfs2_block_group_search; 1086ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 10874d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma /* 10881187c968852e3c668f3b9376083851f81f6eee22Joel Becker * stat(2) can't handle i_ino > 32bits, so we tell the 10891187c968852e3c668f3b9376083851f81f6eee22Joel Becker * lower levels not to allocate us a block group past that 109012462f1d9f0b96389497438dc2730c6f7410be82Joel Becker * limit. The 'inode64' mount option avoids this behavior. 10911187c968852e3c668f3b9376083851f81f6eee22Joel Becker */ 109212462f1d9f0b96389497438dc2730c6f7410be82Joel Becker if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64)) 109312462f1d9f0b96389497438dc2730c6f7410be82Joel Becker (*ac)->ac_max_block = (u32)~0U; 10941187c968852e3c668f3b9376083851f81f6eee22Joel Becker 10951187c968852e3c668f3b9376083851f81f6eee22Joel Becker /* 10964d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * slot is set when we successfully steal inode from other nodes. 10974d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * It is reset in 3 places: 10984d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * 1. when we flush the truncate log 10994d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * 2. when we complete local alloc recovery. 11004d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * 3. when we successfully allocate from our own slot. 11014d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * After it is set, we will go on stealing inodes until we find the 11024d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * need to check our slots to see whether there is some space for us. 11034d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma */ 11044d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma if (slot != OCFS2_INVALID_SLOT && 1105b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang atomic_read(&osb->s_num_inodes_stolen) < OCFS2_MAX_TO_STEAL) 11064d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma goto inode_steal; 11074d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma 11084d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma atomic_set(&osb->s_num_inodes_stolen, 0); 1109feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma alloc_group = osb->osb_inode_alloc_group; 1110da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh status = ocfs2_reserve_suballoc_bits(osb, *ac, 1111da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh INODE_ALLOC_SYSTEM_INODE, 1112b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang (u32)osb->slot_num, 1113feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma &alloc_group, 111460ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma ALLOC_NEW_GROUP | 111560ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma ALLOC_GROUPS_FROM_GLOBAL); 11164d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma if (status >= 0) { 11174d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma status = 0; 11184d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma 1119feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma spin_lock(&osb->osb_lock); 1120feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma osb->osb_inode_alloc_group = alloc_group; 1121feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma spin_unlock(&osb->osb_lock); 1122feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma mlog(0, "after reservation, new allocation group is " 1123feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma "%llu\n", (unsigned long long)alloc_group); 1124feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma 11254d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma /* 11264d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * Some inodes must be freed by us, so try to allocate 11274d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * from our own next time. 11284d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma */ 11294d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma if (slot != OCFS2_INVALID_SLOT) 11304d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma ocfs2_init_inode_steal_slot(osb); 11314d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma goto bail; 11324d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma } else if (status < 0 && status != -ENOSPC) { 11334d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma mlog_errno(status); 11344d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma goto bail; 11354d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma } 11364d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma 11374d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma ocfs2_free_ac_resource(*ac); 11384d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma 11394d0ddb2ce25db2254d468233d942276ecf40bff8Tao Mainode_steal: 1140b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang status = ocfs2_steal_inode(osb, *ac); 11414d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma atomic_inc(&osb->s_num_inodes_stolen); 1142ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1143ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 1144ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1145ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1146ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1147ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1148ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = 0; 1149ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 1150ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if ((status < 0) && *ac) { 1151ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_free_alloc_context(*ac); 1152ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *ac = NULL; 1153ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1154ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1155ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 1156ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1157ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1158ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1159ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* local alloc code has to do the same thing, so rather than do this 1160ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * twice.. */ 1161ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehint ocfs2_reserve_cluster_bitmap_bits(struct ocfs2_super *osb, 1162ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_alloc_context *ac) 1163ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1164ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1165ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1166ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_which = OCFS2_AC_USE_MAIN; 1167ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_group_search = ocfs2_cluster_group_search; 1168ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1169da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh status = ocfs2_reserve_suballoc_bits(osb, ac, 1170da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh GLOBAL_BITMAP_SYSTEM_INODE, 1171feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma OCFS2_INVALID_SLOT, NULL, 1172ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma ALLOC_NEW_GROUP); 1173da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh if (status < 0 && status != -ENOSPC) { 1174ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1175da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh goto bail; 1176da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh } 1177da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh 1178ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 1179ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1180ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1181ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1182ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* Callers don't need to care which bitmap (local alloc or main) to 1183ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * use so we figure it out for them, but unfortunately this clutters 1184ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * things a bit. */ 11851187c968852e3c668f3b9376083851f81f6eee22Joel Beckerstatic int ocfs2_reserve_clusters_with_limit(struct ocfs2_super *osb, 11861187c968852e3c668f3b9376083851f81f6eee22Joel Becker u32 bits_wanted, u64 max_block, 118760ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma int flags, 11881187c968852e3c668f3b9376083851f81f6eee22Joel Becker struct ocfs2_alloc_context **ac) 1189ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1190ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1191ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1192ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 1193ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1194cd86128088554d64fea1679191509f00e6353c5bRobert P. J. Day *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); 1195ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!(*ac)) { 1196ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOMEM; 1197ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1198ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1199ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1200ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1201ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (*ac)->ac_bits_wanted = bits_wanted; 12021187c968852e3c668f3b9376083851f81f6eee22Joel Becker (*ac)->ac_max_block = max_block; 1203ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1204ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOSPC; 120560ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma if (!(flags & ALLOC_GROUPS_FROM_GLOBAL) && 120660ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma ocfs2_alloc_should_use_local(osb, bits_wanted)) { 1207ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = ocfs2_reserve_local_alloc_bits(osb, 1208ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bits_wanted, 1209ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *ac); 1210a57c8fd2ad238258cc983049008aea5f985804b2Mark Fasheh if ((status < 0) && (status != -ENOSPC)) { 1211ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1212ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1213ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1214ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1215ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1216ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status == -ENOSPC) { 1217ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = ocfs2_reserve_cluster_bitmap_bits(osb, *ac); 1218ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1219ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 1220ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1221ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1222ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1223ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1224ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1225ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = 0; 1226ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 1227ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if ((status < 0) && *ac) { 1228ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_free_alloc_context(*ac); 1229ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *ac = NULL; 1230ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1231ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1232ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 1233ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1234ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1235ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 12361187c968852e3c668f3b9376083851f81f6eee22Joel Beckerint ocfs2_reserve_clusters(struct ocfs2_super *osb, 12371187c968852e3c668f3b9376083851f81f6eee22Joel Becker u32 bits_wanted, 12381187c968852e3c668f3b9376083851f81f6eee22Joel Becker struct ocfs2_alloc_context **ac) 12391187c968852e3c668f3b9376083851f81f6eee22Joel Becker{ 124060ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma return ocfs2_reserve_clusters_with_limit(osb, bits_wanted, 0, 124160ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma ALLOC_NEW_GROUP, ac); 12421187c968852e3c668f3b9376083851f81f6eee22Joel Becker} 12431187c968852e3c668f3b9376083851f81f6eee22Joel Becker 1244ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* 1245ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * More or less lifted from ext3. I'll leave their description below: 1246ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 1247ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * "For ext3 allocations, we must not reuse any blocks which are 1248ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * allocated in the bitmap buffer's "last committed data" copy. This 1249ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * prevents deletes from freeing up the page for reuse until we have 1250ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * committed the delete transaction. 1251ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 1252ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * If we didn't do this, then deleting something and reallocating it as 1253ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * data would allow the old block to be overwritten before the 1254ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * transaction committed (because we force data to disk before commit). 1255ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * This would lead to corruption if we crashed between overwriting the 1256ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * data and committing the delete. 1257ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 1258ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * @@@ We may want to make this allocation behaviour conditional on 1259ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * data-writes at some point, and disable it for metadata allocations or 1260ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * sync-data inodes." 1261ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 1262ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * Note: OCFS2 already does this differently for metadata vs data 1263c78bad11fbf1272ea021f56458025dc98486d6f4Joe Perches * allocations, as those bitmaps are separate and undo access is never 1264ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * called on a metadata group descriptor. 1265ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh */ 1266ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_test_bg_bit_allocatable(struct buffer_head *bg_bh, 1267ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int nr) 1268ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1269ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; 127094e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran int ret; 1271ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1272ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (ocfs2_test_bit(nr, (unsigned long *)bg->bg_bitmap)) 1273ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return 0; 127494e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran 127594e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran if (!buffer_jbd(bg_bh)) 1276ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return 1; 1277ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 127894e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran jbd_lock_bh_state(bg_bh); 1279ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg = (struct ocfs2_group_desc *) bh2jh(bg_bh)->b_committed_data; 128094e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran if (bg) 128194e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran ret = !ocfs2_test_bit(nr, (unsigned long *)bg->bg_bitmap); 128294e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran else 128394e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran ret = 1; 128494e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran jbd_unlock_bh_state(bg_bh); 128594e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran 128694e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran return ret; 1287ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1288ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1289ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_block_group_find_clear_bits(struct ocfs2_super *osb, 1290ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *bg_bh, 1291ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh unsigned int bits_wanted, 12927bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh unsigned int total_bits, 12937d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res) 1294ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1295ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh void *bitmap; 1296ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 best_offset, best_size; 1297ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int offset, start, found, status = 0; 1298ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; 1299ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 13004203530613280281868b3ca36c817530bca3825cJoel Becker /* Callers got this descriptor from 13014203530613280281868b3ca36c817530bca3825cJoel Becker * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ 13024203530613280281868b3ca36c817530bca3825cJoel Becker BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); 1303ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1304ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh found = start = best_offset = best_size = 0; 1305ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bitmap = bg->bg_bitmap; 1306ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 13077bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh while((offset = ocfs2_find_next_zero_bit(bitmap, total_bits, start)) != -1) { 13087bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh if (offset == total_bits) 1309ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh break; 1310ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1311ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!ocfs2_test_bg_bit_allocatable(bg_bh, offset)) { 1312ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* We found a zero, but we can't use it as it 1313ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * hasn't been put to disk yet! */ 1314ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh found = 0; 1315ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh start = offset + 1; 1316ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } else if (offset == start) { 1317ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* we found a zero */ 1318ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh found++; 1319ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* move start to the next bit to test */ 1320ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh start++; 1321ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } else { 1322ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* got a zero after some ones */ 1323ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh found = 1; 1324ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh start = offset + 1; 1325ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1326ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (found > best_size) { 1327ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh best_size = found; 1328ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh best_offset = start - found; 1329ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1330ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* we got everything we needed */ 1331ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (found == bits_wanted) { 1332ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* mlog(0, "Found it all!\n"); */ 1333ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh break; 1334ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1335ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1336ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 13377d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker if (best_size) { 13387d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bit_offset = best_offset; 13397d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bits = best_size; 1340ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } else { 1341ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOSPC; 1342ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* No error log here -- see the comment above 1343ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * ocfs2_test_bg_bit_allocatable */ 1344ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1345ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1346ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1347ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1348ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 13491fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fashehstatic inline int ocfs2_block_group_set_bits(handle_t *handle, 1350ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode, 1351ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg, 1352ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh, 1353ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh unsigned int bit_off, 1354ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh unsigned int num_bits) 1355ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1356ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1357ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh void *bitmap = bg->bg_bitmap; 1358ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int journal_type = OCFS2_JOURNAL_ACCESS_WRITE; 1359ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1360ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 1361ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 13624203530613280281868b3ca36c817530bca3825cJoel Becker /* All callers get the descriptor via 13634203530613280281868b3ca36c817530bca3825cJoel Becker * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ 13644203530613280281868b3ca36c817530bca3825cJoel Becker BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); 1365ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(le16_to_cpu(bg->bg_free_bits_count) < num_bits); 1366ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1367ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog(0, "block_group_set_bits: off = %u, num = %u\n", bit_off, 1368ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh num_bits); 1369ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1370ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (ocfs2_is_cluster_bitmap(alloc_inode)) 1371ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh journal_type = OCFS2_JOURNAL_ACCESS_UNDO; 1372ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 137313723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker status = ocfs2_journal_access_gd(handle, 13740cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker INODE_CACHE(alloc_inode), 137513723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker group_bh, 137613723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker journal_type); 1377ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1378ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1379ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1380ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1381ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1382ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le16_add_cpu(&bg->bg_free_bits_count, -num_bits); 1383ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh while(num_bits--) 1384ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_set_bit(bit_off++, bitmap); 1385ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1386ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, group_bh); 1387ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1388ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 1389ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 1390ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1391ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1392ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1393ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* find the one with the most empty bits */ 1394ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline u16 ocfs2_find_victim_chain(struct ocfs2_chain_list *cl) 1395ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1396ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 curr, best; 1397ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1398ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!cl->cl_next_free_rec); 1399ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1400ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh best = curr = 0; 1401ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh while (curr < le16_to_cpu(cl->cl_next_free_rec)) { 1402ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (le32_to_cpu(cl->cl_recs[curr].c_free) > 1403ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(cl->cl_recs[best].c_free)) 1404ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh best = curr; 1405ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh curr++; 1406ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1407ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1408ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(best >= le16_to_cpu(cl->cl_next_free_rec)); 1409ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return best; 1410ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1411ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 14121fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fashehstatic int ocfs2_relink_block_group(handle_t *handle, 1413ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode, 1414ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *fe_bh, 1415ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *bg_bh, 1416ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *prev_bg_bh, 1417ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 chain) 1418ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1419ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1420ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* there is a really tiny chance the journal calls could fail, 1421ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * but we wouldn't want inconsistent blocks in *any* case. */ 1422ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 fe_ptr, bg_ptr, prev_bg_ptr; 1423ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; 1424ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; 1425ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *prev_bg = (struct ocfs2_group_desc *) prev_bg_bh->b_data; 1426ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 14274203530613280281868b3ca36c817530bca3825cJoel Becker /* The caller got these descriptors from 14284203530613280281868b3ca36c817530bca3825cJoel Becker * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ 14294203530613280281868b3ca36c817530bca3825cJoel Becker BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); 14304203530613280281868b3ca36c817530bca3825cJoel Becker BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(prev_bg)); 1431ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1432b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh mlog(0, "Suballoc %llu, chain %u, move group %llu to top, prev = %llu\n", 14331ca1a111b1e6be843c9ce5245dcd570312998d94Mark Fasheh (unsigned long long)le64_to_cpu(fe->i_blkno), chain, 14341ca1a111b1e6be843c9ce5245dcd570312998d94Mark Fasheh (unsigned long long)le64_to_cpu(bg->bg_blkno), 14351ca1a111b1e6be843c9ce5245dcd570312998d94Mark Fasheh (unsigned long long)le64_to_cpu(prev_bg->bg_blkno)); 1436ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1437ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe_ptr = le64_to_cpu(fe->id2.i_chain.cl_recs[chain].c_blkno); 1438ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg_ptr = le64_to_cpu(bg->bg_next_group); 1439ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh prev_bg_ptr = le64_to_cpu(prev_bg->bg_next_group); 1440ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 14410cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), 14420cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker prev_bg_bh, 144313723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker OCFS2_JOURNAL_ACCESS_WRITE); 1444ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1445ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1446ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto out_rollback; 1447ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1448ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1449ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh prev_bg->bg_next_group = bg->bg_next_group; 1450ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, prev_bg_bh); 1451ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 14520cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), 14530cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker bg_bh, OCFS2_JOURNAL_ACCESS_WRITE); 1454ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1455ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1456ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto out_rollback; 1457ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1458ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1459ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_next_group = fe->id2.i_chain.cl_recs[chain].c_blkno; 1460ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, bg_bh); 1461ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 14620cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), 14630cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker fe_bh, OCFS2_JOURNAL_ACCESS_WRITE); 1464ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1465ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1466ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto out_rollback; 1467ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1468ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1469ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe->id2.i_chain.cl_recs[chain].c_blkno = bg->bg_blkno; 1470ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, fe_bh); 1471ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1472ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehout_rollback: 1473ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1474ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe->id2.i_chain.cl_recs[chain].c_blkno = cpu_to_le64(fe_ptr); 1475ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_next_group = cpu_to_le64(bg_ptr); 1476ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh prev_bg->bg_next_group = cpu_to_le64(prev_bg_ptr); 1477ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 14784203530613280281868b3ca36c817530bca3825cJoel Becker 1479ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 1480ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1481ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1482ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1483ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg, 1484ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 wanted) 1485ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1486ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return le16_to_cpu(bg->bg_free_bits_count) > wanted; 1487ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1488ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1489ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* return 0 on success, -ENOSPC to keep searching and any other < 0 1490ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * value on error. */ 1491ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_cluster_group_search(struct inode *inode, 1492ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh, 1493ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, u32 min_bits, 14941187c968852e3c668f3b9376083851f81f6eee22Joel Becker u64 max_block, 14957d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res) 1496ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1497ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int search = -ENOSPC; 1498ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int ret; 14991187c968852e3c668f3b9376083851f81f6eee22Joel Becker u64 blkoff; 15007bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *) group_bh->b_data; 15019c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 15027bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh unsigned int max_bits, gd_cluster_off; 1503ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1504ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ocfs2_is_cluster_bitmap(inode)); 1505ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 15067bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh if (gd->bg_free_bits_count) { 15077bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh max_bits = le16_to_cpu(gd->bg_bits); 15087bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh 15097bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh /* Tail groups in cluster bitmaps which aren't cpg 15107bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh * aligned are prone to partial extention by a failed 15117bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh * fs resize. If the file system resize never got to 15127bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh * update the dinode cluster count, then we don't want 15137bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh * to trust any clusters past it, regardless of what 15147bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh * the group descriptor says. */ 15157bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh gd_cluster_off = ocfs2_blocks_to_clusters(inode->i_sb, 15167bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh le64_to_cpu(gd->bg_blkno)); 15177bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh if ((gd_cluster_off + max_bits) > 15187bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh OCFS2_I(inode)->ip_clusters) { 15197bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh max_bits = OCFS2_I(inode)->ip_clusters - gd_cluster_off; 15207bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh mlog(0, "Desc %llu, bg_bits %u, clusters %u, use %u\n", 15217bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh (unsigned long long)le64_to_cpu(gd->bg_blkno), 15227bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh le16_to_cpu(gd->bg_bits), 15237bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh OCFS2_I(inode)->ip_clusters, max_bits); 15247bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh } 15257bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh 1526ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ret = ocfs2_block_group_find_clear_bits(OCFS2_SB(inode->i_sb), 1527ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group_bh, bits_wanted, 15287d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker max_bits, res); 1529ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (ret) 1530ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return ret; 1531ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 15321187c968852e3c668f3b9376083851f81f6eee22Joel Becker if (max_block) { 15331187c968852e3c668f3b9376083851f81f6eee22Joel Becker blkoff = ocfs2_clusters_to_blocks(inode->i_sb, 15341187c968852e3c668f3b9376083851f81f6eee22Joel Becker gd_cluster_off + 15357d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bit_offset + 15367d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bits); 15371187c968852e3c668f3b9376083851f81f6eee22Joel Becker mlog(0, "Checking %llu against %llu\n", 15381187c968852e3c668f3b9376083851f81f6eee22Joel Becker (unsigned long long)blkoff, 15391187c968852e3c668f3b9376083851f81f6eee22Joel Becker (unsigned long long)max_block); 15401187c968852e3c668f3b9376083851f81f6eee22Joel Becker if (blkoff > max_block) 15411187c968852e3c668f3b9376083851f81f6eee22Joel Becker return -ENOSPC; 15421187c968852e3c668f3b9376083851f81f6eee22Joel Becker } 15431187c968852e3c668f3b9376083851f81f6eee22Joel Becker 1544ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* ocfs2_block_group_find_clear_bits() might 1545ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * return success, but we still want to return 1546ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * -ENOSPC unless it found the minimum number 1547ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * of bits. */ 15487d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker if (min_bits <= res->sr_bits) 1549ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh search = 0; /* success */ 15507d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker else if (res->sr_bits) { 15519c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh /* 15529c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh * Don't show bits which we'll be returning 15539c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh * for allocation to the local alloc bitmap. 15549c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh */ 15557d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker ocfs2_local_alloc_seen_free_bits(osb, res->sr_bits); 1556ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1557ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1558ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1559ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return search; 1560ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1561ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1562ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_block_group_search(struct inode *inode, 1563ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh, 1564ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, u32 min_bits, 15651187c968852e3c668f3b9376083851f81f6eee22Joel Becker u64 max_block, 15667d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res) 1567ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1568ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int ret = -ENOSPC; 15691187c968852e3c668f3b9376083851f81f6eee22Joel Becker u64 blkoff; 1570ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) group_bh->b_data; 1571ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1572ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(min_bits != 1); 1573ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ocfs2_is_cluster_bitmap(inode)); 1574ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 15751187c968852e3c668f3b9376083851f81f6eee22Joel Becker if (bg->bg_free_bits_count) { 1576ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ret = ocfs2_block_group_find_clear_bits(OCFS2_SB(inode->i_sb), 1577ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group_bh, bits_wanted, 15787bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh le16_to_cpu(bg->bg_bits), 15797d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res); 15801187c968852e3c668f3b9376083851f81f6eee22Joel Becker if (!ret && max_block) { 15817d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker blkoff = le64_to_cpu(bg->bg_blkno) + 15827d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bit_offset + res->sr_bits; 15831187c968852e3c668f3b9376083851f81f6eee22Joel Becker mlog(0, "Checking %llu against %llu\n", 15841187c968852e3c668f3b9376083851f81f6eee22Joel Becker (unsigned long long)blkoff, 15851187c968852e3c668f3b9376083851f81f6eee22Joel Becker (unsigned long long)max_block); 15861187c968852e3c668f3b9376083851f81f6eee22Joel Becker if (blkoff > max_block) 15871187c968852e3c668f3b9376083851f81f6eee22Joel Becker ret = -ENOSPC; 15881187c968852e3c668f3b9376083851f81f6eee22Joel Becker } 15891187c968852e3c668f3b9376083851f81f6eee22Joel Becker } 1590ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1591ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return ret; 1592ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1593ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1594883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fashehstatic int ocfs2_alloc_dinode_update_counts(struct inode *inode, 15951fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fasheh handle_t *handle, 1596883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh struct buffer_head *di_bh, 1597883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u32 num_bits, 1598883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u16 chain) 1599883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh{ 1600883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh int ret; 1601883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u32 tmp_used; 1602883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; 1603883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &di->id2.i_chain; 1604883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 16050cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, 160613723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker OCFS2_JOURNAL_ACCESS_WRITE); 1607883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (ret < 0) { 1608883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh mlog_errno(ret); 1609883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh goto out; 1610883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1611883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1612883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh tmp_used = le32_to_cpu(di->id1.bitmap1.i_used); 1613883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh di->id1.bitmap1.i_used = cpu_to_le32(num_bits + tmp_used); 1614883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh le32_add_cpu(&cl->cl_recs[chain].c_free, -num_bits); 1615ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, di_bh); 1616883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1617883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fashehout: 1618883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh return ret; 1619883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh} 1620883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1621ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Beckerstatic int ocfs2_bg_discontig_fix_by_rec(struct ocfs2_suballoc_result *res, 1622ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker struct ocfs2_extent_rec *rec, 1623ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker struct ocfs2_chain_list *cl) 162413e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker{ 162513e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker unsigned int bpc = le16_to_cpu(cl->cl_bpc); 162613e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker unsigned int bitoff = le32_to_cpu(rec->e_cpos) * bpc; 162713e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker unsigned int bitcount = le32_to_cpu(rec->e_leaf_clusters) * bpc; 162813e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 162913e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker if (res->sr_bit_offset < bitoff) 163013e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker return 0; 163113e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker if (res->sr_bit_offset >= (bitoff + bitcount)) 163213e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker return 0; 1633ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker res->sr_blkno = le64_to_cpu(rec->e_blkno) + 1634ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker (res->sr_bit_offset - bitoff); 163513e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker if ((res->sr_bit_offset + res->sr_bits) > (bitoff + bitcount)) 163613e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker res->sr_bits = (bitoff + bitcount) - res->sr_bit_offset; 163713e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker return 1; 163813e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker} 163913e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 1640ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Beckerstatic void ocfs2_bg_discontig_fix_result(struct ocfs2_alloc_context *ac, 1641ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker struct ocfs2_group_desc *bg, 1642ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker struct ocfs2_suballoc_result *res) 164313e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker{ 164413e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker int i; 16452b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker u64 bg_blkno = res->sr_bg_blkno; /* Save off */ 164613e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker struct ocfs2_extent_rec *rec; 164713e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker struct ocfs2_dinode *di = (struct ocfs2_dinode *)ac->ac_bh->b_data; 164813e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker struct ocfs2_chain_list *cl = &di->id2.i_chain; 164913e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 1650ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker if (ocfs2_is_cluster_bitmap(ac->ac_inode)) { 1651ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker res->sr_blkno = 0; 165213e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker return; 1653ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker } 165413e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 1655ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker res->sr_blkno = res->sr_bg_blkno + res->sr_bit_offset; 16562b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker res->sr_bg_blkno = 0; /* Clear it for contig block groups */ 16574711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma if (!ocfs2_supports_discontig_bg(OCFS2_SB(ac->ac_inode->i_sb)) || 1658ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker !bg->bg_list.l_next_free_rec) 165913e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker return; 166013e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 166113e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker for (i = 0; i < le16_to_cpu(bg->bg_list.l_next_free_rec); i++) { 166213e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker rec = &bg->bg_list.l_recs[i]; 16632b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker if (ocfs2_bg_discontig_fix_by_rec(res, rec, cl)) { 16642b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker res->sr_bg_blkno = bg_blkno; /* Restore */ 166513e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker break; 16662b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker } 166713e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker } 166813e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker} 166913e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 1670883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fashehstatic int ocfs2_search_one_group(struct ocfs2_alloc_context *ac, 16711fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fasheh handle_t *handle, 1672883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u32 bits_wanted, 1673883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u32 min_bits, 16747d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res, 1675883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u16 *bits_left) 1676883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh{ 1677883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh int ret; 1678883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh struct buffer_head *group_bh = NULL; 1679883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh struct ocfs2_group_desc *gd; 168068f64d471be38631d7196b938d9809802dd467faJoel Becker struct ocfs2_dinode *di = (struct ocfs2_dinode *)ac->ac_bh->b_data; 1681883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh struct inode *alloc_inode = ac->ac_inode; 1682883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 16837d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker ret = ocfs2_read_group_descriptor(alloc_inode, di, 16847d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bg_blkno, &group_bh); 1685883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (ret < 0) { 1686883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh mlog_errno(ret); 1687883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh return ret; 1688883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1689883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1690883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh gd = (struct ocfs2_group_desc *) group_bh->b_data; 1691883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh ret = ac->ac_group_search(alloc_inode, group_bh, bits_wanted, min_bits, 16927d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker ac->ac_max_block, res); 1693883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (ret < 0) { 1694883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (ret != -ENOSPC) 1695883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh mlog_errno(ret); 1696883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh goto out; 1697883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1698883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 169913e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker if (!ret) 1700ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker ocfs2_bg_discontig_fix_result(ac, gd, res); 170113e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 1702e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh /* 1703e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * sr_bg_blkno might have been changed by 1704e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * ocfs2_bg_discontig_fix_result 1705e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh */ 1706e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh res->sr_bg_stable_blkno = group_bh->b_blocknr; 1707e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 1708e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (ac->ac_find_loc_only) 1709e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh goto out_loc_only; 1710e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 1711883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh ret = ocfs2_alloc_dinode_update_counts(alloc_inode, handle, ac->ac_bh, 17127d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bits, 1713883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh le16_to_cpu(gd->bg_chain)); 1714883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (ret < 0) { 1715883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh mlog_errno(ret); 1716883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh goto out; 1717883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1718883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1719883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh ret = ocfs2_block_group_set_bits(handle, alloc_inode, gd, group_bh, 17207d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bit_offset, res->sr_bits); 1721883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (ret < 0) 1722883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh mlog_errno(ret); 1723883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1724e49e27674d1dd2717ad90b21ece8f83102153315Mark Fashehout_loc_only: 1725883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh *bits_left = le16_to_cpu(gd->bg_free_bits_count); 1726883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1727883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fashehout: 1728883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh brelse(group_bh); 1729883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1730883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh return ret; 1731883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh} 1732883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1733ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_search_chain(struct ocfs2_alloc_context *ac, 17341fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fasheh handle_t *handle, 1735ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, 1736ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 min_bits, 17377d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res, 1738883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u16 *bits_left) 1739ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1740ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 17417d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker u16 chain; 1742ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 next_group; 1743ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode = ac->ac_inode; 1744ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh = NULL; 1745ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *prev_group_bh = NULL; 1746ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe = (struct ocfs2_dinode *) ac->ac_bh->b_data; 1747ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; 1748ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg; 1749ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1750ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh chain = ac->ac_chain; 1751b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh mlog(0, "trying to alloc %u bits from chain %u, inode %llu\n", 1752b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh bits_wanted, chain, 1753b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno); 1754ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 175568f64d471be38631d7196b938d9809802dd467faJoel Becker status = ocfs2_read_group_descriptor(alloc_inode, fe, 175668f64d471be38631d7196b938d9809802dd467faJoel Becker le64_to_cpu(cl->cl_recs[chain].c_blkno), 175768f64d471be38631d7196b938d9809802dd467faJoel Becker &group_bh); 1758ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1759ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1760ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1761ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1762ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg = (struct ocfs2_group_desc *) group_bh->b_data; 1763ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1764ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOSPC; 1765ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* for now, the chain search is a bit simplistic. We just use 1766ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * the 1st group with any empty bits. */ 17671187c968852e3c668f3b9376083851f81f6eee22Joel Becker while ((status = ac->ac_group_search(alloc_inode, group_bh, 17681187c968852e3c668f3b9376083851f81f6eee22Joel Becker bits_wanted, min_bits, 17697d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker ac->ac_max_block, 17707d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res)) == -ENOSPC) { 1771ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!bg->bg_next_group) 1772ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh break; 1773a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh 1774a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh brelse(prev_group_bh); 1775a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh prev_group_bh = NULL; 1776a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh 1777ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh next_group = le64_to_cpu(bg->bg_next_group); 1778ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh prev_group_bh = group_bh; 1779ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group_bh = NULL; 178068f64d471be38631d7196b938d9809802dd467faJoel Becker status = ocfs2_read_group_descriptor(alloc_inode, fe, 178168f64d471be38631d7196b938d9809802dd467faJoel Becker next_group, &group_bh); 1782ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1783ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1784ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1785ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1786ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg = (struct ocfs2_group_desc *) group_bh->b_data; 1787ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1788ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1789ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 1790ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1791ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1792ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1793ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1794b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh mlog(0, "alloc succeeds: we give %u bits from block group %llu\n", 17957d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bits, (unsigned long long)le64_to_cpu(bg->bg_blkno)); 1796ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 17977d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bg_blkno = le64_to_cpu(bg->bg_blkno); 1798ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 17997d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker BUG_ON(res->sr_bits == 0); 180013e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker if (!status) 1801ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker ocfs2_bg_discontig_fix_result(ac, bg, res); 180213e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 1803e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh /* 1804e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * sr_bg_blkno might have been changed by 1805e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * ocfs2_bg_discontig_fix_result 1806e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh */ 1807e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh res->sr_bg_stable_blkno = group_bh->b_blocknr; 1808ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1809ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* 1810ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * Keep track of previous block descriptor read. When 1811ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * we find a target, if we have read more than X 1812ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * number of descriptors, and the target is reasonably 1813ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * empty, relink him to top of his chain. 1814ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 1815ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * We've read 0 extra blocks and only send one more to 1816ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * the transaction, yet the next guy to search has a 1817ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * much easier time. 1818ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 1819ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * Do this *after* figuring out how many bits we're taking out 1820ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * of our target group. 1821ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh */ 1822ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (ac->ac_allow_chain_relink && 1823ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (prev_group_bh) && 18247d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker (ocfs2_block_group_reasonably_empty(bg, res->sr_bits))) { 1825ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = ocfs2_relink_block_group(handle, alloc_inode, 1826ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_bh, group_bh, 1827ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh prev_group_bh, chain); 1828ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1829ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1830ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1831ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1832ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1833ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1834e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (ac->ac_find_loc_only) 1835e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh goto out_loc_only; 1836e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 1837d51349829c378c06ba4aa7d4b16ca23739858608Mark Fasheh status = ocfs2_alloc_dinode_update_counts(alloc_inode, handle, 1838d51349829c378c06ba4aa7d4b16ca23739858608Mark Fasheh ac->ac_bh, res->sr_bits, 1839d51349829c378c06ba4aa7d4b16ca23739858608Mark Fasheh chain); 1840d51349829c378c06ba4aa7d4b16ca23739858608Mark Fasheh if (status) { 1841ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1842ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1843ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1844ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1845ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = ocfs2_block_group_set_bits(handle, 1846ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh alloc_inode, 1847ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg, 1848ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group_bh, 18497d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bit_offset, 18507d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bits); 1851ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1852ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1853ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1854ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1855ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 18567d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker mlog(0, "Allocated %u bits from suballocator %llu\n", res->sr_bits, 18571ca1a111b1e6be843c9ce5245dcd570312998d94Mark Fasheh (unsigned long long)le64_to_cpu(fe->i_blkno)); 1858ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1859e49e27674d1dd2717ad90b21ece8f83102153315Mark Fashehout_loc_only: 1860883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh *bits_left = le16_to_cpu(bg->bg_free_bits_count); 1861ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 1862a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh brelse(group_bh); 1863a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh brelse(prev_group_bh); 1864ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1865ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 1866ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1867ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1868ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1869ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* will give out up to bits_wanted contiguous bits. */ 1870aa8f8e93c898a0319bcd6c79a9a42fe52abac7d7Joel Beckerstatic int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *ac, 18711fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fasheh handle_t *handle, 1872ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, 1873ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 min_bits, 18747d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res) 1875ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1876ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1877ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 victim, i; 1878883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u16 bits_left = 0; 1879b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh u64 hint = ac->ac_last_group; 1880ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_chain_list *cl; 1881ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe; 1882ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1883ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 1884ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1885ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_bits_given >= ac->ac_bits_wanted); 1886ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(bits_wanted > (ac->ac_bits_wanted - ac->ac_bits_given)); 1887ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ac->ac_bh); 1888ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1889ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe = (struct ocfs2_dinode *) ac->ac_bh->b_data; 189010995aa2451afa20b721cc7de856cae1a13dba57Joel Becker 189110995aa2451afa20b721cc7de856cae1a13dba57Joel Becker /* The bh was validated by the inode read during 189210995aa2451afa20b721cc7de856cae1a13dba57Joel Becker * ocfs2_reserve_suballoc_bits(). Any corruption is a code bug. */ 189310995aa2451afa20b721cc7de856cae1a13dba57Joel Becker BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); 189410995aa2451afa20b721cc7de856cae1a13dba57Joel Becker 1895ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (le32_to_cpu(fe->id1.bitmap1.i_used) >= 1896ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->id1.bitmap1.i_total)) { 1897aa8f8e93c898a0319bcd6c79a9a42fe52abac7d7Joel Becker ocfs2_error(ac->ac_inode->i_sb, 1898aa8f8e93c898a0319bcd6c79a9a42fe52abac7d7Joel Becker "Chain allocator dinode %llu has %u used " 1899b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh "bits but only %u total.", 1900b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)le64_to_cpu(fe->i_blkno), 1901ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->id1.bitmap1.i_used), 1902ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->id1.bitmap1.i_total)); 1903ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -EIO; 1904ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1905ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1906ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1907b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh res->sr_bg_blkno = hint; 19087d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker if (res->sr_bg_blkno) { 1909883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh /* Attempt to short-circuit the usual search mechanism 1910883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh * by jumping straight to the most recently used 1911883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh * allocation group. This helps us mantain some 1912883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh * contiguousness across allocations. */ 1913da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh status = ocfs2_search_one_group(ac, handle, bits_wanted, 19147d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker min_bits, res, &bits_left); 19157d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker if (!status) 1916883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh goto set_hint; 1917883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (status < 0 && status != -ENOSPC) { 1918883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh mlog_errno(status); 1919883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh goto bail; 1920883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1921883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1922883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1923ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; 1924ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1925ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh victim = ocfs2_find_victim_chain(cl); 1926ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_chain = victim; 1927ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_allow_chain_relink = 1; 1928ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 19297d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker status = ocfs2_search_chain(ac, handle, bits_wanted, min_bits, 19307d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res, &bits_left); 1931b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh if (!status) { 1932b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh hint = ocfs2_group_from_res(res); 1933883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh goto set_hint; 1934b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh } 1935ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0 && status != -ENOSPC) { 1936ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1937ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1938ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1939ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1940ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog(0, "Search of victim chain %u came up with nothing, " 1941ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh "trying all chains now.\n", victim); 1942ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1943ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* If we didn't pick a good victim, then just default to 1944ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * searching each chain in order. Don't allow chain relinking 1945ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * because we only calculate enough journal credits for one 1946ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * relink per alloc. */ 1947ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_allow_chain_relink = 0; 1948ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i ++) { 1949ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (i == victim) 1950ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh continue; 1951ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!cl->cl_recs[i].c_free) 1952ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh continue; 1953ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1954ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_chain = i; 1955da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh status = ocfs2_search_chain(ac, handle, bits_wanted, min_bits, 19567d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res, &bits_left); 1957b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh if (!status) { 1958b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh hint = ocfs2_group_from_res(res); 1959ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh break; 1960b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh } 1961ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0 && status != -ENOSPC) { 1962ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1963ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1964ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1965ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1966ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1967883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fashehset_hint: 1968883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (status != -ENOSPC) { 1969883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh /* If the next search of this group is not likely to 1970883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh * yield a suitable extent, then we reset the last 1971883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh * group hint so as to not waste a disk read */ 1972883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (bits_left < min_bits) 1973883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh ac->ac_last_group = 0; 1974883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh else 1975b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh ac->ac_last_group = hint; 1976883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1977883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1978883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fashehbail: 1979ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 1980ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1981ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1982ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 19831ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Beckerint ocfs2_claim_metadata(handle_t *handle, 1984ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_alloc_context *ac, 1985ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, 19862b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker u64 *suballoc_loc, 1987ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 *suballoc_bit_start, 1988ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh unsigned int *num_bits, 1989ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 *blkno_start) 1990ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1991ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1992ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker struct ocfs2_suballoc_result res = { .sr_blkno = 0, }; 1993ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1994ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ac); 1995ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_bits_wanted < (ac->ac_bits_given + bits_wanted)); 1996ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_which != OCFS2_AC_USE_META); 1997ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1998aa8f8e93c898a0319bcd6c79a9a42fe52abac7d7Joel Becker status = ocfs2_claim_suballoc_bits(ac, 1999da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh handle, 2000ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bits_wanted, 2001ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1, 20027d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker &res); 2003ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 2004ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 2005ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 2006ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 20071ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Becker atomic_inc(&OCFS2_SB(ac->ac_inode->i_sb)->alloc_stats.bg_allocs); 2008ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 20092b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker *suballoc_loc = res.sr_bg_blkno; 20107d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker *suballoc_bit_start = res.sr_bit_offset; 2011ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker *blkno_start = res.sr_blkno; 20127d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker ac->ac_bits_given += res.sr_bits; 20137d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker *num_bits = res.sr_bits; 2014ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = 0; 2015ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 2016ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 2017ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 2018ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2019ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2020138211515c102807a16c02fdc15feef1f6ef8124Tao Mastatic void ocfs2_init_inode_ac_group(struct inode *dir, 2021abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma struct buffer_head *parent_di_bh, 2022138211515c102807a16c02fdc15feef1f6ef8124Tao Ma struct ocfs2_alloc_context *ac) 2023138211515c102807a16c02fdc15feef1f6ef8124Tao Ma{ 2024abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)parent_di_bh->b_data; 2025138211515c102807a16c02fdc15feef1f6ef8124Tao Ma /* 2026138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * Try to allocate inodes from some specific group. 2027138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * 2028138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * If the parent dir has recorded the last group used in allocation, 2029138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * cool, use it. Otherwise if we try to allocate new inode from the 2030138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * same slot the parent dir belongs to, use the same chunk. 2031138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * 2032138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * We are very careful here to avoid the mistake of setting 2033138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * ac_last_group to a group descriptor from a different (unlocked) slot. 2034138211515c102807a16c02fdc15feef1f6ef8124Tao Ma */ 2035138211515c102807a16c02fdc15feef1f6ef8124Tao Ma if (OCFS2_I(dir)->ip_last_used_group && 2036138211515c102807a16c02fdc15feef1f6ef8124Tao Ma OCFS2_I(dir)->ip_last_used_slot == ac->ac_alloc_slot) 2037138211515c102807a16c02fdc15feef1f6ef8124Tao Ma ac->ac_last_group = OCFS2_I(dir)->ip_last_used_group; 2038abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma else if (le16_to_cpu(di->i_suballoc_slot) == ac->ac_alloc_slot) { 2039abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma if (di->i_suballoc_loc) 2040abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma ac->ac_last_group = le64_to_cpu(di->i_suballoc_loc); 2041abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma else 2042abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma ac->ac_last_group = ocfs2_which_suballoc_group( 2043abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma le64_to_cpu(di->i_blkno), 2044abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma le16_to_cpu(di->i_suballoc_bit)); 2045abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma } 2046138211515c102807a16c02fdc15feef1f6ef8124Tao Ma} 2047138211515c102807a16c02fdc15feef1f6ef8124Tao Ma 2048138211515c102807a16c02fdc15feef1f6ef8124Tao Mastatic inline void ocfs2_save_inode_ac_group(struct inode *dir, 2049138211515c102807a16c02fdc15feef1f6ef8124Tao Ma struct ocfs2_alloc_context *ac) 2050138211515c102807a16c02fdc15feef1f6ef8124Tao Ma{ 2051138211515c102807a16c02fdc15feef1f6ef8124Tao Ma OCFS2_I(dir)->ip_last_used_group = ac->ac_last_group; 2052138211515c102807a16c02fdc15feef1f6ef8124Tao Ma OCFS2_I(dir)->ip_last_used_slot = ac->ac_alloc_slot; 2053138211515c102807a16c02fdc15feef1f6ef8124Tao Ma} 2054138211515c102807a16c02fdc15feef1f6ef8124Tao Ma 2055e49e27674d1dd2717ad90b21ece8f83102153315Mark Fashehint ocfs2_find_new_inode_loc(struct inode *dir, 2056e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh struct buffer_head *parent_fe_bh, 2057e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh struct ocfs2_alloc_context *ac, 2058e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh u64 *fe_blkno) 2059e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh{ 2060e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh int ret; 2061e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh handle_t *handle = NULL; 2062e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh struct ocfs2_suballoc_result *res; 2063e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2064e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh BUG_ON(!ac); 2065e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh BUG_ON(ac->ac_bits_given != 0); 2066e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh BUG_ON(ac->ac_bits_wanted != 1); 2067e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh BUG_ON(ac->ac_which != OCFS2_AC_USE_INODE); 2068e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2069e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh res = kzalloc(sizeof(*res), GFP_NOFS); 2070e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (res == NULL) { 2071e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ret = -ENOMEM; 2072e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh mlog_errno(ret); 2073e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh goto out; 2074e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh } 2075e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2076e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ocfs2_init_inode_ac_group(dir, parent_fe_bh, ac); 2077e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2078e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh /* 2079e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * The handle started here is for chain relink. Alternatively, 2080e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * we could just disable relink for these calls. 2081e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh */ 2082e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh handle = ocfs2_start_trans(OCFS2_SB(dir->i_sb), OCFS2_SUBALLOC_ALLOC); 2083e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (IS_ERR(handle)) { 2084e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ret = PTR_ERR(handle); 2085e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh handle = NULL; 2086e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh mlog_errno(ret); 2087e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh goto out; 2088e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh } 2089e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2090e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh /* 2091e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * This will instruct ocfs2_claim_suballoc_bits and 2092e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * ocfs2_search_one_group to search but save actual allocation 2093e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * for later. 2094e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh */ 2095e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ac->ac_find_loc_only = 1; 2096e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2097e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ret = ocfs2_claim_suballoc_bits(ac, handle, 1, 1, res); 2098e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (ret < 0) { 2099e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh mlog_errno(ret); 2100e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh goto out; 2101e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh } 2102e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2103e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ac->ac_find_loc_priv = res; 2104e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh *fe_blkno = res->sr_blkno; 2105e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2106e49e27674d1dd2717ad90b21ece8f83102153315Mark Fashehout: 2107e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (handle) 2108e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ocfs2_commit_trans(OCFS2_SB(dir->i_sb), handle); 2109e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2110e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (ret) 2111e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh kfree(res); 2112e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2113e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh return ret; 2114e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh} 2115e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2116e49e27674d1dd2717ad90b21ece8f83102153315Mark Fashehint ocfs2_claim_new_inode_at_loc(handle_t *handle, 2117e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh struct inode *dir, 2118e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh struct ocfs2_alloc_context *ac, 2119e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh u64 *suballoc_loc, 2120e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh u16 *suballoc_bit, 2121e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh u64 di_blkno) 2122e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh{ 2123e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh int ret; 2124e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh u16 chain; 2125e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh struct ocfs2_suballoc_result *res = ac->ac_find_loc_priv; 2126e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh struct buffer_head *bg_bh = NULL; 2127e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh struct ocfs2_group_desc *bg; 2128e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh struct ocfs2_dinode *di = (struct ocfs2_dinode *) ac->ac_bh->b_data; 2129e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2130e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh /* 2131e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * Since di_blkno is being passed back in, we check for any 2132e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * inconsistencies which may have happened between 2133e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * calls. These are code bugs as di_blkno is not expected to 2134e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * change once returned from ocfs2_find_new_inode_loc() 2135e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh */ 2136e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh BUG_ON(res->sr_blkno != di_blkno); 2137e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2138e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ret = ocfs2_read_group_descriptor(ac->ac_inode, di, 2139e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh res->sr_bg_stable_blkno, &bg_bh); 2140e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (ret) { 2141e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh mlog_errno(ret); 2142e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh goto out; 2143e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh } 2144e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2145e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh bg = (struct ocfs2_group_desc *) bg_bh->b_data; 2146e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh chain = le16_to_cpu(bg->bg_chain); 2147e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2148e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ret = ocfs2_alloc_dinode_update_counts(ac->ac_inode, handle, 2149e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ac->ac_bh, res->sr_bits, 2150e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh chain); 2151e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (ret) { 2152e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh mlog_errno(ret); 2153e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh goto out; 2154e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh } 2155e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2156e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ret = ocfs2_block_group_set_bits(handle, 2157e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ac->ac_inode, 2158e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh bg, 2159e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh bg_bh, 2160e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh res->sr_bit_offset, 2161e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh res->sr_bits); 2162e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (ret < 0) { 2163e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh mlog_errno(ret); 2164e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh goto out; 2165e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh } 2166e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2167e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh mlog(0, "Allocated %u bits from suballocator %llu\n", res->sr_bits, 2168e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh (unsigned long long)di_blkno); 2169e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2170e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh atomic_inc(&OCFS2_SB(ac->ac_inode->i_sb)->alloc_stats.bg_allocs); 2171e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2172e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh BUG_ON(res->sr_bits != 1); 2173e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2174e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh *suballoc_loc = res->sr_bg_blkno; 2175e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh *suballoc_bit = res->sr_bit_offset; 2176e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ac->ac_bits_given++; 2177e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ocfs2_save_inode_ac_group(dir, ac); 2178e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2179e49e27674d1dd2717ad90b21ece8f83102153315Mark Fashehout: 2180e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh brelse(bg_bh); 2181e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2182e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh return ret; 2183e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh} 2184e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 21851ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Beckerint ocfs2_claim_new_inode(handle_t *handle, 2186138211515c102807a16c02fdc15feef1f6ef8124Tao Ma struct inode *dir, 2187138211515c102807a16c02fdc15feef1f6ef8124Tao Ma struct buffer_head *parent_fe_bh, 2188ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_alloc_context *ac, 21892b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker u64 *suballoc_loc, 2190ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 *suballoc_bit, 2191ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 *fe_blkno) 2192ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2193ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 21942b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker struct ocfs2_suballoc_result res; 2195ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2196ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 2197ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2198ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ac); 2199ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_bits_given != 0); 2200ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_bits_wanted != 1); 2201ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_which != OCFS2_AC_USE_INODE); 2202ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2203138211515c102807a16c02fdc15feef1f6ef8124Tao Ma ocfs2_init_inode_ac_group(dir, parent_fe_bh, ac); 2204138211515c102807a16c02fdc15feef1f6ef8124Tao Ma 2205aa8f8e93c898a0319bcd6c79a9a42fe52abac7d7Joel Becker status = ocfs2_claim_suballoc_bits(ac, 2206da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh handle, 2207ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1, 2208ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1, 22097d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker &res); 2210ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 2211ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 2212ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 2213ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 22141ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Becker atomic_inc(&OCFS2_SB(ac->ac_inode->i_sb)->alloc_stats.bg_allocs); 2215ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 22167d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker BUG_ON(res.sr_bits != 1); 2217ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 22182b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker *suballoc_loc = res.sr_bg_blkno; 22197d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker *suballoc_bit = res.sr_bit_offset; 2220ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker *fe_blkno = res.sr_blkno; 2221ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_bits_given++; 2222138211515c102807a16c02fdc15feef1f6ef8124Tao Ma ocfs2_save_inode_ac_group(dir, ac); 2223ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = 0; 2224ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 2225ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 2226ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 2227ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2228ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2229ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* translate a group desc. blkno and it's bitmap offset into 2230ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * disk cluster offset. */ 2231ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline u32 ocfs2_desc_bitmap_to_cluster_off(struct inode *inode, 2232ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 bg_blkno, 2233ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 bg_bit_off) 2234ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2235ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 2236ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 cluster = 0; 2237ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2238ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ocfs2_is_cluster_bitmap(inode)); 2239ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2240ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (bg_blkno != osb->first_cluster_group_blkno) 2241ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh cluster = ocfs2_blocks_to_clusters(inode->i_sb, bg_blkno); 2242ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh cluster += (u32) bg_bit_off; 2243ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return cluster; 2244ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2245ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2246ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* given a cluster offset, calculate which block group it belongs to 2247ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * and return that block offset. */ 2248d659072f736837e56b6433d58e5315ad1d4d5ccfTao Mau64 ocfs2_which_cluster_group(struct inode *inode, u32 cluster) 2249ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2250ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 2251ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 group_no; 2252ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2253ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ocfs2_is_cluster_bitmap(inode)); 2254ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2255ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group_no = cluster / osb->bitmap_cpg; 2256ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!group_no) 2257ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return osb->first_cluster_group_blkno; 2258ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return ocfs2_clusters_to_blocks(inode->i_sb, 2259ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group_no * osb->bitmap_cpg); 2260ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2261ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2262ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* given the block number of a cluster start, calculate which cluster 2263ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * group and descriptor bitmap offset that corresponds to. */ 2264ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline void ocfs2_block_to_cluster_group(struct inode *inode, 2265ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 data_blkno, 2266ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 *bg_blkno, 2267ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 *bg_bit_off) 2268ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2269ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 2270ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 data_cluster = ocfs2_blocks_to_clusters(osb->sb, data_blkno); 2271ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2272ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ocfs2_is_cluster_bitmap(inode)); 2273ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2274ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *bg_blkno = ocfs2_which_cluster_group(inode, 2275ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh data_cluster); 2276ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2277ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (*bg_blkno == osb->first_cluster_group_blkno) 2278ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *bg_bit_off = (u16) data_cluster; 2279ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh else 2280ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *bg_bit_off = (u16) ocfs2_blocks_to_clusters(osb->sb, 2281ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh data_blkno - *bg_blkno); 2282ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2283ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2284ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* 2285ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * min_bits - minimum contiguous chunk from this total allocation we 2286ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * can handle. set to what we asked for originally for a full 2287ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * contig. allocation, set to '1' to indicate we can deal with extents 2288ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * of any size. 2289ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh */ 22901ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Beckerint __ocfs2_claim_clusters(handle_t *handle, 2291415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh struct ocfs2_alloc_context *ac, 2292415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 min_clusters, 2293415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 max_clusters, 2294415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 *cluster_start, 2295415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 *num_clusters) 2296ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2297ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 2298415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh unsigned int bits_wanted = max_clusters; 2299ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker struct ocfs2_suballoc_result res = { .sr_blkno = 0, }; 23001ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Becker struct ocfs2_super *osb = OCFS2_SB(ac->ac_inode->i_sb); 2301ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2302ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 2303ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2304ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_bits_given >= ac->ac_bits_wanted); 2305ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2306ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_which != OCFS2_AC_USE_LOCAL 2307ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh && ac->ac_which != OCFS2_AC_USE_MAIN); 2308ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2309ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (ac->ac_which == OCFS2_AC_USE_LOCAL) { 231033d5d380d667ad264675cfdb297dfc3c5b6542ccMark Fasheh WARN_ON(min_clusters > 1); 231133d5d380d667ad264675cfdb297dfc3c5b6542ccMark Fasheh 2312ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = ocfs2_claim_local_alloc_bits(osb, 2313ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh handle, 2314ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac, 2315ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bits_wanted, 2316ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh cluster_start, 2317ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh num_clusters); 2318ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!status) 2319ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh atomic_inc(&osb->alloc_stats.local_data); 2320ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } else { 2321ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (min_clusters > (osb->bitmap_cpg - 1)) { 2322ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* The only paths asking for contiguousness 2323ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * should know about this already. */ 23242fbe8d1ebe004425b4f7b8bba345623d2280be82Sunil Mushran mlog(ML_ERROR, "minimum allocation requested %u exceeds " 23252fbe8d1ebe004425b4f7b8bba345623d2280be82Sunil Mushran "group bitmap size %u!\n", min_clusters, 23262fbe8d1ebe004425b4f7b8bba345623d2280be82Sunil Mushran osb->bitmap_cpg); 2327ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOSPC; 2328ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 2329ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2330ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* clamp the current request down to a realistic size. */ 2331ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (bits_wanted > (osb->bitmap_cpg - 1)) 2332ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bits_wanted = osb->bitmap_cpg - 1; 2333ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2334aa8f8e93c898a0319bcd6c79a9a42fe52abac7d7Joel Becker status = ocfs2_claim_suballoc_bits(ac, 2335da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh handle, 2336ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bits_wanted, 2337ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh min_clusters, 23387d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker &res); 2339ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!status) { 2340ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker BUG_ON(res.sr_blkno); /* cluster alloc can't set */ 2341ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *cluster_start = 2342ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_desc_bitmap_to_cluster_off(ac->ac_inode, 23437d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res.sr_bg_blkno, 23447d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res.sr_bit_offset); 2345ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh atomic_inc(&osb->alloc_stats.bitmap_data); 23464711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma *num_clusters = res.sr_bits; 2347ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2348ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2349ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 2350ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 2351ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 2352ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 2353ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2354ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 23554711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma ac->ac_bits_given += *num_clusters; 2356ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2357ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 2358ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 2359ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 2360ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2361ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 23621ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Beckerint ocfs2_claim_clusters(handle_t *handle, 2363415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh struct ocfs2_alloc_context *ac, 2364415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 min_clusters, 2365415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 *cluster_start, 2366415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 *num_clusters) 2367415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh{ 2368415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh unsigned int bits_wanted = ac->ac_bits_wanted - ac->ac_bits_given; 2369415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh 23701ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Becker return __ocfs2_claim_clusters(handle, ac, min_clusters, 2371415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh bits_wanted, cluster_start, num_clusters); 2372415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh} 2373415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh 2374b4414eea0e7b9c134262c801a87e338bf675962cMark Fashehstatic int ocfs2_block_group_clear_bits(handle_t *handle, 2375b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct inode *alloc_inode, 2376b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct ocfs2_group_desc *bg, 2377b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct buffer_head *group_bh, 2378b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int bit_off, 2379b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int num_bits, 2380b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh void (*undo_fn)(unsigned int bit, 2381b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned long *bmap)) 2382ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2383ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 2384ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh unsigned int tmp; 2385ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *undo_bg = NULL; 2386ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2387ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 2388ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 23894203530613280281868b3ca36c817530bca3825cJoel Becker /* The caller got this descriptor from 23904203530613280281868b3ca36c817530bca3825cJoel Becker * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ 23914203530613280281868b3ca36c817530bca3825cJoel Becker BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); 2392ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2393ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog(0, "off = %u, num = %u\n", bit_off, num_bits); 2394ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2395b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh BUG_ON(undo_fn && !ocfs2_is_cluster_bitmap(alloc_inode)); 23960cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), 2397b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh group_bh, 2398b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh undo_fn ? 2399b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh OCFS2_JOURNAL_ACCESS_UNDO : 2400b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh OCFS2_JOURNAL_ACCESS_WRITE); 2401ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 2402ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 2403ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 2404ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2405ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2406b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh if (undo_fn) { 240794e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran jbd_lock_bh_state(group_bh); 240894e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran undo_bg = (struct ocfs2_group_desc *) 240994e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran bh2jh(group_bh)->b_committed_data; 241094e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran BUG_ON(!undo_bg); 241194e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran } 2412ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2413ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh tmp = num_bits; 2414ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh while(tmp--) { 2415ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_clear_bit((bit_off + tmp), 2416ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (unsigned long *) bg->bg_bitmap); 2417b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh if (undo_fn) 2418b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh undo_fn(bit_off + tmp, 2419b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh (unsigned long *) undo_bg->bg_bitmap); 2420ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2421ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le16_add_cpu(&bg->bg_free_bits_count, num_bits); 2422ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2423b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh if (undo_fn) 242494e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran jbd_unlock_bh_state(group_bh); 242594e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran 2426ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, group_bh); 2427ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 2428ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 2429ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2430ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2431ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* 2432ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * expects the suballoc inode to already be locked. 2433ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh */ 2434b4414eea0e7b9c134262c801a87e338bf675962cMark Fashehstatic int _ocfs2_free_suballoc_bits(handle_t *handle, 2435b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct inode *alloc_inode, 2436b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct buffer_head *alloc_bh, 2437b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int start_bit, 2438b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh u64 bg_blkno, 2439b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int count, 2440b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh void (*undo_fn)(unsigned int bit, 2441b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned long *bitmap)) 2442ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2443ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status = 0; 2444ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 tmp_used; 2445ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe = (struct ocfs2_dinode *) alloc_bh->b_data; 2446ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_chain_list *cl = &fe->id2.i_chain; 2447ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh = NULL; 2448ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *group; 2449ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2450ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 2451ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 245210995aa2451afa20b721cc7de856cae1a13dba57Joel Becker /* The alloc_bh comes from ocfs2_free_dinode() or 245310995aa2451afa20b721cc7de856cae1a13dba57Joel Becker * ocfs2_free_clusters(). The callers have all locked the 245410995aa2451afa20b721cc7de856cae1a13dba57Joel Becker * allocator and gotten alloc_bh from the lock call. This 245510995aa2451afa20b721cc7de856cae1a13dba57Joel Becker * validates the dinode buffer. Any corruption that has happended 245610995aa2451afa20b721cc7de856cae1a13dba57Joel Becker * is a code bug. */ 245710995aa2451afa20b721cc7de856cae1a13dba57Joel Becker BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); 2458ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON((count + start_bit) > ocfs2_bits_per_group(cl)); 2459ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2460b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh mlog(0, "%llu: freeing %u bits from group %llu, starting at %u\n", 2461b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno, count, 2462b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)bg_blkno, start_bit); 2463ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 246468f64d471be38631d7196b938d9809802dd467faJoel Becker status = ocfs2_read_group_descriptor(alloc_inode, fe, bg_blkno, 246568f64d471be38631d7196b938d9809802dd467faJoel Becker &group_bh); 2466ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 2467ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 2468ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 2469ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2470ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group = (struct ocfs2_group_desc *) group_bh->b_data; 247168f64d471be38631d7196b938d9809802dd467faJoel Becker 2472ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON((count + start_bit) > le16_to_cpu(group->bg_bits)); 2473ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2474ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = ocfs2_block_group_clear_bits(handle, alloc_inode, 2475ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group, group_bh, 2476b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh start_bit, count, undo_fn); 2477ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 2478ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 2479ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 2480ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2481ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 24820cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), 24830cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker alloc_bh, OCFS2_JOURNAL_ACCESS_WRITE); 2484ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 2485ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 2486ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 2487ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2488ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2489ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_add_cpu(&cl->cl_recs[le16_to_cpu(group->bg_chain)].c_free, 2490ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh count); 2491ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh tmp_used = le32_to_cpu(fe->id1.bitmap1.i_used); 2492ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe->id1.bitmap1.i_used = cpu_to_le32(tmp_used - count); 2493ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, alloc_bh); 2494ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2495ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 2496a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh brelse(group_bh); 2497ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2498ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 2499ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 2500ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2501ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2502b4414eea0e7b9c134262c801a87e338bf675962cMark Fashehint ocfs2_free_suballoc_bits(handle_t *handle, 2503b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct inode *alloc_inode, 2504b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct buffer_head *alloc_bh, 2505b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int start_bit, 2506b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh u64 bg_blkno, 2507b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int count) 2508b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh{ 2509b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh return _ocfs2_free_suballoc_bits(handle, alloc_inode, alloc_bh, 2510b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh start_bit, bg_blkno, count, NULL); 2511b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh} 2512b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh 25131fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fashehint ocfs2_free_dinode(handle_t *handle, 2514ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *inode_alloc_inode, 2515ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *inode_alloc_bh, 2516ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *di) 2517ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2518ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 blk = le64_to_cpu(di->i_blkno); 2519ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 bit = le16_to_cpu(di->i_suballoc_bit); 2520ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 bg_blkno = ocfs2_which_suballoc_group(blk, bit); 2521ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 252274380c479ad83addeff8a172ab95f59557b5b0c3Tao Ma if (di->i_suballoc_loc) 252374380c479ad83addeff8a172ab95f59557b5b0c3Tao Ma bg_blkno = le64_to_cpu(di->i_suballoc_loc); 2524ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return ocfs2_free_suballoc_bits(handle, inode_alloc_inode, 2525ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh inode_alloc_bh, bit, bg_blkno, 1); 2526ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2527ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2528b4414eea0e7b9c134262c801a87e338bf675962cMark Fashehstatic int _ocfs2_free_clusters(handle_t *handle, 2529b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct inode *bitmap_inode, 2530b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct buffer_head *bitmap_bh, 2531b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh u64 start_blk, 2532b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int num_clusters, 2533b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh void (*undo_fn)(unsigned int bit, 2534b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned long *bitmap)) 2535ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2536ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 2537ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 bg_start_bit; 2538ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 bg_blkno; 2539ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe; 2540ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2541ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* You can't ever have a contiguous set of clusters 2542ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * bigger than a block group bitmap so we never have to worry 2543ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * about looping on them. */ 2544ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2545ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 2546ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2547ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* This is expensive. We can safely remove once this stuff has 2548ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * gotten tested really well. */ 2549ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(start_blk != ocfs2_clusters_to_blocks(bitmap_inode->i_sb, ocfs2_blocks_to_clusters(bitmap_inode->i_sb, start_blk))); 2550ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2551ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe = (struct ocfs2_dinode *) bitmap_bh->b_data; 2552ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2553ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_block_to_cluster_group(bitmap_inode, start_blk, &bg_blkno, 2554ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh &bg_start_bit); 2555ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2556b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh mlog(0, "want to free %u clusters starting at block %llu\n", 2557b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh num_clusters, (unsigned long long)start_blk); 2558b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh mlog(0, "bg_blkno = %llu, bg_start_bit = %u\n", 2559b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)bg_blkno, bg_start_bit); 2560ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2561b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh status = _ocfs2_free_suballoc_bits(handle, bitmap_inode, bitmap_bh, 2562b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh bg_start_bit, bg_blkno, 2563b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh num_clusters, undo_fn); 25649c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh if (status < 0) { 2565ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 25669c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh goto out; 25679c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh } 25689c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh 25699c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh ocfs2_local_alloc_seen_free_bits(OCFS2_SB(bitmap_inode->i_sb), 25709c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh num_clusters); 2571ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 25729c7af40b210e87f8fddd97b0badc0a352862234aMark Fashehout: 2573ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 2574ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 2575ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2576ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2577b4414eea0e7b9c134262c801a87e338bf675962cMark Fashehint ocfs2_free_clusters(handle_t *handle, 2578b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct inode *bitmap_inode, 2579b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct buffer_head *bitmap_bh, 2580b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh u64 start_blk, 2581b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int num_clusters) 2582b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh{ 2583b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh return _ocfs2_free_clusters(handle, bitmap_inode, bitmap_bh, 2584b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh start_blk, num_clusters, 2585b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh _ocfs2_set_bit); 2586b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh} 2587b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh 2588b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh/* 2589b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh * Give never-used clusters back to the global bitmap. We don't need 2590b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh * to protect these bits in the undo buffer. 2591b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh */ 2592b4414eea0e7b9c134262c801a87e338bf675962cMark Fashehint ocfs2_release_clusters(handle_t *handle, 2593b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct inode *bitmap_inode, 2594b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct buffer_head *bitmap_bh, 2595b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh u64 start_blk, 2596b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int num_clusters) 2597b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh{ 2598b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh return _ocfs2_free_clusters(handle, bitmap_inode, bitmap_bh, 2599b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh start_blk, num_clusters, 2600b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh _ocfs2_clear_bit); 2601b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh} 2602b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh 2603ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline void ocfs2_debug_bg(struct ocfs2_group_desc *bg) 2604ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2605ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("Block Group:\n"); 2606ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("bg_signature: %s\n", bg->bg_signature); 2607ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("bg_size: %u\n", bg->bg_size); 2608ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("bg_bits: %u\n", bg->bg_bits); 2609ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("bg_free_bits_count: %u\n", bg->bg_free_bits_count); 2610ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("bg_chain: %u\n", bg->bg_chain); 2611ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("bg_generation: %u\n", le32_to_cpu(bg->bg_generation)); 2612b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh printk("bg_next_group: %llu\n", 2613b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)bg->bg_next_group); 2614b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh printk("bg_parent_dinode: %llu\n", 2615b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)bg->bg_parent_dinode); 2616b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh printk("bg_blkno: %llu\n", 2617b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)bg->bg_blkno); 2618ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2619ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2620ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline void ocfs2_debug_suballoc_inode(struct ocfs2_dinode *fe) 2621ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2622ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int i; 2623ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2624b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh printk("Suballoc Inode %llu:\n", (unsigned long long)fe->i_blkno); 2625ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("i_signature: %s\n", fe->i_signature); 2626b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh printk("i_size: %llu\n", 2627b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)fe->i_size); 2628ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("i_clusters: %u\n", fe->i_clusters); 2629ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("i_generation: %u\n", 2630ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->i_generation)); 2631ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("id1.bitmap1.i_used: %u\n", 2632ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->id1.bitmap1.i_used)); 2633ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("id1.bitmap1.i_total: %u\n", 2634ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->id1.bitmap1.i_total)); 2635ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("id2.i_chain.cl_cpg: %u\n", fe->id2.i_chain.cl_cpg); 2636ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("id2.i_chain.cl_bpc: %u\n", fe->id2.i_chain.cl_bpc); 2637ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("id2.i_chain.cl_count: %u\n", fe->id2.i_chain.cl_count); 2638ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("id2.i_chain.cl_next_free_rec: %u\n", 2639ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe->id2.i_chain.cl_next_free_rec); 2640ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh for(i = 0; i < fe->id2.i_chain.cl_next_free_rec; i++) { 2641ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("fe->id2.i_chain.cl_recs[%d].c_free: %u\n", i, 2642ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe->id2.i_chain.cl_recs[i].c_free); 2643ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("fe->id2.i_chain.cl_recs[%d].c_total: %u\n", i, 2644ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe->id2.i_chain.cl_recs[i].c_total); 2645b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh printk("fe->id2.i_chain.cl_recs[%d].c_blkno: %llu\n", i, 2646b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)fe->id2.i_chain.cl_recs[i].c_blkno); 2647ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2648ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2649e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2650e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma/* 2651e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * For a given allocation, determine which allocators will need to be 2652e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * accessed, and lock them, reserving the appropriate number of bits. 2653e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * 2654e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * Sparse file systems call this from ocfs2_write_begin_nolock() 2655e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * and ocfs2_allocate_unwritten_extents(). 2656e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * 2657e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * File systems which don't support holes call this from 2658e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * ocfs2_extend_allocation(). 2659e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma */ 2660f99b9b7ccf6a691f653cec45f36bfdd1e94769c7Joel Beckerint ocfs2_lock_allocators(struct inode *inode, 2661f99b9b7ccf6a691f653cec45f36bfdd1e94769c7Joel Becker struct ocfs2_extent_tree *et, 2662e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma u32 clusters_to_add, u32 extents_to_split, 2663e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma struct ocfs2_alloc_context **data_ac, 2664f99b9b7ccf6a691f653cec45f36bfdd1e94769c7Joel Becker struct ocfs2_alloc_context **meta_ac) 2665e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma{ 2666e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma int ret = 0, num_free_extents; 2667e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma unsigned int max_recs_needed = clusters_to_add + 2 * extents_to_split; 2668e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 2669e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2670e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma *meta_ac = NULL; 2671e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (data_ac) 2672e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma *data_ac = NULL; 2673e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2674e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma BUG_ON(clusters_to_add != 0 && data_ac == NULL); 2675e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 26763d03a305ded8057155bd3c801e64ffef9f534827Joel Becker num_free_extents = ocfs2_num_free_extents(osb, et); 2677e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (num_free_extents < 0) { 2678e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma ret = num_free_extents; 2679e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma mlog_errno(ret); 2680e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma goto out; 2681e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma } 2682e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2683e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma /* 2684e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * Sparse allocation file systems need to be more conservative 2685e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * with reserving room for expansion - the actual allocation 2686e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * happens while we've got a journal handle open so re-taking 2687e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * a cluster lock (because we ran out of room for another 2688e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * extent) will violate ordering rules. 2689e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * 2690e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * Most of the time we'll only be seeing this 1 cluster at a time 2691e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * anyway. 2692e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * 2693e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * Always lock for any unwritten extents - we might want to 2694e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * add blocks during a split. 2695e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma */ 2696e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (!num_free_extents || 2697e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma (ocfs2_sparse_alloc(osb) && num_free_extents < max_recs_needed)) { 2698f99b9b7ccf6a691f653cec45f36bfdd1e94769c7Joel Becker ret = ocfs2_reserve_new_metadata(osb, et->et_root_el, meta_ac); 2699e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (ret < 0) { 2700e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (ret != -ENOSPC) 2701e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma mlog_errno(ret); 2702e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma goto out; 2703e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma } 2704e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma } 2705e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2706e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (clusters_to_add == 0) 2707e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma goto out; 2708e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2709e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma ret = ocfs2_reserve_clusters(osb, clusters_to_add, data_ac); 2710e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (ret < 0) { 2711e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (ret != -ENOSPC) 2712e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma mlog_errno(ret); 2713e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma goto out; 2714e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma } 2715e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2716e7d4cb6bc19658646357eeff134645cd9bc3479fTao Maout: 2717e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (ret) { 2718e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (*meta_ac) { 2719e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma ocfs2_free_alloc_context(*meta_ac); 2720e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma *meta_ac = NULL; 2721e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma } 2722e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2723e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma /* 2724e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * We cannot have an error and a non null *data_ac. 2725e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma */ 2726e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma } 2727e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2728e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma return ret; 2729e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma} 27306ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 27316ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang/* 27326ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * Read the inode specified by blkno to get suballoc_slot and 27336ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * suballoc_bit. 27346ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang */ 27356ca497a83e592d64e050c4d04b6dedb8c915f39awengang wangstatic int ocfs2_get_suballoc_slot_bit(struct ocfs2_super *osb, u64 blkno, 2736889f004a8c83d515f275078687f859bc0d5ede9dTao Ma u16 *suballoc_slot, u64 *group_blkno, 2737889f004a8c83d515f275078687f859bc0d5ede9dTao Ma u16 *suballoc_bit) 27386ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang{ 27396ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang int status; 27406ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct buffer_head *inode_bh = NULL; 27416ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct ocfs2_dinode *inode_fe; 27426ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 27435b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker mlog_entry("blkno: %llu\n", (unsigned long long)blkno); 27446ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 27456ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang /* dirty read disk */ 27466ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = ocfs2_read_blocks_sync(osb, blkno, 1, &inode_bh); 27476ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (status < 0) { 27485b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker mlog(ML_ERROR, "read block %llu failed %d\n", 27495b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker (unsigned long long)blkno, status); 27506ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 27516ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 27526ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 27536ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang inode_fe = (struct ocfs2_dinode *) inode_bh->b_data; 27546ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (!OCFS2_IS_VALID_DINODE(inode_fe)) { 27555b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker mlog(ML_ERROR, "invalid inode %llu requested\n", 27565b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker (unsigned long long)blkno); 27576ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = -EINVAL; 27586ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 27596ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 27606ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 27610fba813748f16f4eaf24d492c505226c4026d58fTao Ma if (le16_to_cpu(inode_fe->i_suballoc_slot) != (u16)OCFS2_INVALID_SLOT && 27626ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang (u32)le16_to_cpu(inode_fe->i_suballoc_slot) > osb->max_slots - 1) { 27636ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mlog(ML_ERROR, "inode %llu has invalid suballoc slot %u\n", 27645b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker (unsigned long long)blkno, 27655b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker (u32)le16_to_cpu(inode_fe->i_suballoc_slot)); 27666ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = -EINVAL; 27676ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 27686ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 27696ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 27706ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (suballoc_slot) 27716ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang *suballoc_slot = le16_to_cpu(inode_fe->i_suballoc_slot); 27726ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (suballoc_bit) 27736ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang *suballoc_bit = le16_to_cpu(inode_fe->i_suballoc_bit); 2774889f004a8c83d515f275078687f859bc0d5ede9dTao Ma if (group_blkno) 2775889f004a8c83d515f275078687f859bc0d5ede9dTao Ma *group_blkno = le64_to_cpu(inode_fe->i_suballoc_loc); 27766ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 27776ca497a83e592d64e050c4d04b6dedb8c915f39awengang wangbail: 27786ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang brelse(inode_bh); 27796ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 27806ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mlog_exit(status); 27816ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang return status; 27826ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang} 27836ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 27846ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang/* 27856ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * test whether bit is SET in allocator bitmap or not. on success, 0 27866ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * is returned and *res is 1 for SET; 0 otherwise. when fails, errno 27876ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * is returned and *res is meaningless. Call this after you have 27886ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * cluster locked against suballoc, or you may get a result based on 27896ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * non-up2date contents 27906ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang */ 27916ca497a83e592d64e050c4d04b6dedb8c915f39awengang wangstatic int ocfs2_test_suballoc_bit(struct ocfs2_super *osb, 27926ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct inode *suballoc, 2793889f004a8c83d515f275078687f859bc0d5ede9dTao Ma struct buffer_head *alloc_bh, 2794889f004a8c83d515f275078687f859bc0d5ede9dTao Ma u64 group_blkno, u64 blkno, 27956ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang u16 bit, int *res) 27966ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang{ 2797abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma struct ocfs2_dinode *alloc_di; 27986ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct ocfs2_group_desc *group; 27996ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct buffer_head *group_bh = NULL; 28006ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang u64 bg_blkno; 28016ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang int status; 28026ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 28035b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker mlog_entry("blkno: %llu bit: %u\n", (unsigned long long)blkno, 28045b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker (unsigned int)bit); 28056ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 2806abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma alloc_di = (struct ocfs2_dinode *)alloc_bh->b_data; 2807abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma if ((bit + 1) > ocfs2_bits_per_group(&alloc_di->id2.i_chain)) { 28086ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mlog(ML_ERROR, "suballoc bit %u out of range of %u\n", 28096ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang (unsigned int)bit, 2810abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma ocfs2_bits_per_group(&alloc_di->id2.i_chain)); 28116ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = -EINVAL; 28126ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 28136ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 28146ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 2815889f004a8c83d515f275078687f859bc0d5ede9dTao Ma bg_blkno = group_blkno ? group_blkno : 2816889f004a8c83d515f275078687f859bc0d5ede9dTao Ma ocfs2_which_suballoc_group(blkno, bit); 2817abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma status = ocfs2_read_group_descriptor(suballoc, alloc_di, bg_blkno, 28186ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang &group_bh); 28196ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (status < 0) { 28205b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker mlog(ML_ERROR, "read group %llu failed %d\n", 28215b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker (unsigned long long)bg_blkno, status); 28226ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 28236ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 28246ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 28256ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang group = (struct ocfs2_group_desc *) group_bh->b_data; 28266ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang *res = ocfs2_test_bit(bit, (unsigned long *)group->bg_bitmap); 28276ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 28286ca497a83e592d64e050c4d04b6dedb8c915f39awengang wangbail: 28296ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang brelse(group_bh); 28306ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 28316ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mlog_exit(status); 28326ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang return status; 28336ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang} 28346ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 28356ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang/* 28366ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * Test if the bit representing this inode (blkno) is set in the 28376ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * suballocator. 28386ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * 28396ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * On success, 0 is returned and *res is 1 for SET; 0 otherwise. 28406ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * 28416ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * In the event of failure, a negative value is returned and *res is 28426ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * meaningless. 28436ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * 28446ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * Callers must make sure to hold nfs_sync_lock to prevent 28456ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * ocfs2_delete_inode() on another node from accessing the same 28466ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * suballocator concurrently. 28476ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang */ 28486ca497a83e592d64e050c4d04b6dedb8c915f39awengang wangint ocfs2_test_inode_bit(struct ocfs2_super *osb, u64 blkno, int *res) 28496ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang{ 28506ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang int status; 2851889f004a8c83d515f275078687f859bc0d5ede9dTao Ma u64 group_blkno = 0; 28526ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang u16 suballoc_bit = 0, suballoc_slot = 0; 28536ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct inode *inode_alloc_inode; 28546ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct buffer_head *alloc_bh = NULL; 28556ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 28565b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker mlog_entry("blkno: %llu", (unsigned long long)blkno); 28576ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 28586ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = ocfs2_get_suballoc_slot_bit(osb, blkno, &suballoc_slot, 2859889f004a8c83d515f275078687f859bc0d5ede9dTao Ma &group_blkno, &suballoc_bit); 28606ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (status < 0) { 28616ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mlog(ML_ERROR, "get alloc slot and bit failed %d\n", status); 28626ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 28636ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 28646ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 28656ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang inode_alloc_inode = 28666ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE, 28676ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang suballoc_slot); 28686ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (!inode_alloc_inode) { 28696ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang /* the error code could be inaccurate, but we are not able to 28706ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * get the correct one. */ 28716ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = -EINVAL; 28726ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mlog(ML_ERROR, "unable to get alloc inode in slot %u\n", 28736ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang (u32)suballoc_slot); 28746ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 28756ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 28766ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 28776ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mutex_lock(&inode_alloc_inode->i_mutex); 28786ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = ocfs2_inode_lock(inode_alloc_inode, &alloc_bh, 0); 28796ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (status < 0) { 28806ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mutex_unlock(&inode_alloc_inode->i_mutex); 28816ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mlog(ML_ERROR, "lock on alloc inode on slot %u failed %d\n", 28826ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang (u32)suballoc_slot, status); 28836ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 28846ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 28856ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 28866ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = ocfs2_test_suballoc_bit(osb, inode_alloc_inode, alloc_bh, 2887889f004a8c83d515f275078687f859bc0d5ede9dTao Ma group_blkno, blkno, suballoc_bit, res); 28886ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (status < 0) 28896ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mlog(ML_ERROR, "test suballoc bit failed %d\n", status); 28906ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 28916ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang ocfs2_inode_unlock(inode_alloc_inode, 0); 28926ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mutex_unlock(&inode_alloc_inode->i_mutex); 28936ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 28946ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang iput(inode_alloc_inode); 28956ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang brelse(alloc_bh); 28966ca497a83e592d64e050c4d04b6dedb8c915f39awengang wangbail: 28976ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mlog_exit(status); 28986ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang return status; 28996ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang} 2900