suballoc.c revision 7391a294b861bf2c3b762dfdcf61b9c5f1bffa1f
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#include <cluster/masklog.h> 33ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 34ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "ocfs2.h" 35ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 36ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "alloc.h" 37d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker#include "blockcheck.h" 38ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "dlmglue.h" 39ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "inode.h" 40ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "journal.h" 41ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "localalloc.h" 42ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "suballoc.h" 43ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "super.h" 44ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "sysfile.h" 45ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "uptodate.h" 462f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma#include "ocfs2_trace.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 3112f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_validate_group_descriptor( 3122f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma (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 if (((unsigned long long) bg_bh->b_blocknr) != group_blkno) { 393b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh ocfs2_error(alloc_inode->i_sb, "group block (%llu) != " 394b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh "b_blocknr (%llu)", 395b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)group_blkno, 396ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (unsigned long long) bg_bh->b_blocknr); 397ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -EIO; 398ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 399ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 400ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 40113723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker status = ocfs2_journal_access_gd(handle, 4020cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker INODE_CACHE(alloc_inode), 40313723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker bg_bh, 40413723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker OCFS2_JOURNAL_ACCESS_CREATE); 405ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 406ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 407ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 408ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 409ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 410ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh memset(bg, 0, sb->s_blocksize); 411ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh strcpy(bg->bg_signature, OCFS2_GROUP_DESC_SIGNATURE); 412ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_generation = cpu_to_le32(OCFS2_SB(sb)->fs_generation); 4138571882c21e5073b2f96147ec4ff9b7042339e1bTao Ma bg->bg_size = cpu_to_le16(ocfs2_group_bitmap_size(sb, 1, 4148571882c21e5073b2f96147ec4ff9b7042339e1bTao Ma osb->s_feature_incompat)); 415ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_chain = cpu_to_le16(my_chain); 416ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_next_group = cl->cl_recs[my_chain].c_blkno; 417ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_parent_dinode = cpu_to_le64(OCFS2_I(alloc_inode)->ip_blkno); 418ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_blkno = cpu_to_le64(group_blkno); 419798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (group_clusters == le16_to_cpu(cl->cl_cpg)) 420798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg->bg_bits = cpu_to_le16(ocfs2_bits_per_group(cl)); 421798db35f4649eac2778381c390ed7d12de9ec767Joel Becker else 4224711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma ocfs2_bg_discontig_add_extent(osb, bg, cl, group_blkno, 423798db35f4649eac2778381c390ed7d12de9ec767Joel Becker group_clusters); 424798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 425ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* set the 1st bit in the bitmap to account for the descriptor block */ 426ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_set_bit(0, (unsigned long *)bg->bg_bitmap); 427ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_free_bits_count = cpu_to_le16(le16_to_cpu(bg->bg_bits) - 1); 428ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 429ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, bg_bh); 430ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 431ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* There is no need to zero out or otherwise initialize the 432ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * other blocks in a group - All valid FS metadata in a block 433ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * group stores the superblock fs_generation value at 434ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * allocation time. */ 435ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 436ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 437c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma if (status) 438c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma mlog_errno(status); 439ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 440ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 441ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 442ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline u16 ocfs2_find_smallest_chain(struct ocfs2_chain_list *cl) 443ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 444ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 curr, best; 445ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 446ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh best = curr = 0; 447ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh while (curr < le16_to_cpu(cl->cl_count)) { 448ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (le32_to_cpu(cl->cl_recs[best].c_total) > 449ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(cl->cl_recs[curr].c_total)) 450ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh best = curr; 451ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh curr++; 452ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 453ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return best; 454ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 455ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 456798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerstatic struct buffer_head * 457798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerocfs2_block_group_alloc_contig(struct ocfs2_super *osb, handle_t *handle, 458798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct inode *alloc_inode, 459798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_alloc_context *ac, 460798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_chain_list *cl) 461798db35f4649eac2778381c390ed7d12de9ec767Joel Becker{ 462798db35f4649eac2778381c390ed7d12de9ec767Joel Becker int status; 463798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u32 bit_off, num_bits; 464798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u64 bg_blkno; 465798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct buffer_head *bg_bh; 466798db35f4649eac2778381c390ed7d12de9ec767Joel Becker unsigned int alloc_rec = ocfs2_find_smallest_chain(cl); 467798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 4681ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Becker status = ocfs2_claim_clusters(handle, ac, 469798db35f4649eac2778381c390ed7d12de9ec767Joel Becker le16_to_cpu(cl->cl_cpg), &bit_off, 470798db35f4649eac2778381c390ed7d12de9ec767Joel Becker &num_bits); 471798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status < 0) { 472798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status != -ENOSPC) 473798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 474798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 475798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 476798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 477798db35f4649eac2778381c390ed7d12de9ec767Joel Becker /* setup the group */ 478798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_blkno = ocfs2_clusters_to_blocks(osb->sb, bit_off); 4792f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_block_group_alloc_contig( 4802f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma (unsigned long long)bg_blkno, alloc_rec); 481798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 482798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh = sb_getblk(osb->sb, bg_blkno); 483798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (!bg_bh) { 4847391a294b861bf2c3b762dfdcf61b9c5f1bffa1fRui Xiang status = -ENOMEM; 485798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 486798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 487798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 488798db35f4649eac2778381c390ed7d12de9ec767Joel Becker ocfs2_set_new_buffer_uptodate(INODE_CACHE(alloc_inode), bg_bh); 489798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 490798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = ocfs2_block_group_fill(handle, alloc_inode, bg_bh, 491798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_blkno, num_bits, alloc_rec, cl); 492798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status < 0) { 493798db35f4649eac2778381c390ed7d12de9ec767Joel Becker brelse(bg_bh); 494798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 495798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 496798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 497798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerbail: 498798db35f4649eac2778381c390ed7d12de9ec767Joel Becker return status ? ERR_PTR(status) : bg_bh; 499798db35f4649eac2778381c390ed7d12de9ec767Joel Becker} 500798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 501798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerstatic int ocfs2_block_group_claim_bits(struct ocfs2_super *osb, 502798db35f4649eac2778381c390ed7d12de9ec767Joel Becker handle_t *handle, 503798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_alloc_context *ac, 504798db35f4649eac2778381c390ed7d12de9ec767Joel Becker unsigned int min_bits, 505798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u32 *bit_off, u32 *num_bits) 506798db35f4649eac2778381c390ed7d12de9ec767Joel Becker{ 50718d3a98f3c1b0e27ce026afa4d1ef042f2903726Joel Becker int status = 0; 508798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 509798db35f4649eac2778381c390ed7d12de9ec767Joel Becker while (min_bits) { 5101ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Becker status = ocfs2_claim_clusters(handle, ac, min_bits, 511798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bit_off, num_bits); 512798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status != -ENOSPC) 513798db35f4649eac2778381c390ed7d12de9ec767Joel Becker break; 514798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 515798db35f4649eac2778381c390ed7d12de9ec767Joel Becker min_bits >>= 1; 516798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 517798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 518798db35f4649eac2778381c390ed7d12de9ec767Joel Becker return status; 519798db35f4649eac2778381c390ed7d12de9ec767Joel Becker} 520798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 521798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerstatic int ocfs2_block_group_grow_discontig(handle_t *handle, 522798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct inode *alloc_inode, 523798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct buffer_head *bg_bh, 524798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_alloc_context *ac, 525798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_chain_list *cl, 526798db35f4649eac2778381c390ed7d12de9ec767Joel Becker unsigned int min_bits) 527798db35f4649eac2778381c390ed7d12de9ec767Joel Becker{ 528798db35f4649eac2778381c390ed7d12de9ec767Joel Becker int status; 529798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); 530798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_group_desc *bg = 531798db35f4649eac2778381c390ed7d12de9ec767Joel Becker (struct ocfs2_group_desc *)bg_bh->b_data; 5324711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma unsigned int needed = le16_to_cpu(cl->cl_cpg) - 5334711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma le16_to_cpu(bg->bg_bits) / le16_to_cpu(cl->cl_bpc); 534798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u32 p_cpos, clusters; 535798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u64 p_blkno; 536798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_extent_list *el = &bg->bg_list; 537798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 538798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = ocfs2_journal_access_gd(handle, 539798db35f4649eac2778381c390ed7d12de9ec767Joel Becker INODE_CACHE(alloc_inode), 540798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh, 541798db35f4649eac2778381c390ed7d12de9ec767Joel Becker OCFS2_JOURNAL_ACCESS_CREATE); 542798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status < 0) { 543798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 544798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 545798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 546798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 547798db35f4649eac2778381c390ed7d12de9ec767Joel Becker while ((needed > 0) && (le16_to_cpu(el->l_next_free_rec) < 548798db35f4649eac2778381c390ed7d12de9ec767Joel Becker le16_to_cpu(el->l_count))) { 549798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (min_bits > needed) 550798db35f4649eac2778381c390ed7d12de9ec767Joel Becker min_bits = needed; 551798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = ocfs2_block_group_claim_bits(osb, handle, ac, 552798db35f4649eac2778381c390ed7d12de9ec767Joel Becker min_bits, &p_cpos, 553798db35f4649eac2778381c390ed7d12de9ec767Joel Becker &clusters); 554798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status < 0) { 555798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status != -ENOSPC) 556798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 557798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 558798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 559798db35f4649eac2778381c390ed7d12de9ec767Joel Becker p_blkno = ocfs2_clusters_to_blocks(osb->sb, p_cpos); 560798db35f4649eac2778381c390ed7d12de9ec767Joel Becker ocfs2_bg_discontig_add_extent(osb, bg, cl, p_blkno, 561798db35f4649eac2778381c390ed7d12de9ec767Joel Becker clusters); 562798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 563798db35f4649eac2778381c390ed7d12de9ec767Joel Becker min_bits = clusters; 5644711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma needed = le16_to_cpu(cl->cl_cpg) - 5654711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma le16_to_cpu(bg->bg_bits) / le16_to_cpu(cl->cl_bpc); 566798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 567798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 568798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (needed > 0) { 5694711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma /* 5704711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma * We have used up all the extent rec but can't fill up 5714711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma * the cpg. So bail out. 5724711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma */ 5734711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma status = -ENOSPC; 5744711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma goto bail; 575798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 576798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 577798db35f4649eac2778381c390ed7d12de9ec767Joel Becker ocfs2_journal_dirty(handle, bg_bh); 578798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 579798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerbail: 580798db35f4649eac2778381c390ed7d12de9ec767Joel Becker return status; 581798db35f4649eac2778381c390ed7d12de9ec767Joel Becker} 582798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 5838b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Beckerstatic void ocfs2_bg_alloc_cleanup(handle_t *handle, 5848b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker struct ocfs2_alloc_context *cluster_ac, 5858b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker struct inode *alloc_inode, 5868b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker struct buffer_head *bg_bh) 587798db35f4649eac2778381c390ed7d12de9ec767Joel Becker{ 5888b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker int i, ret; 589798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_group_desc *bg; 590798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_extent_list *el; 591798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_extent_rec *rec; 592798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 593798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (!bg_bh) 594798db35f4649eac2778381c390ed7d12de9ec767Joel Becker return; 595798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 596798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg = (struct ocfs2_group_desc *)bg_bh->b_data; 597798db35f4649eac2778381c390ed7d12de9ec767Joel Becker el = &bg->bg_list; 598798db35f4649eac2778381c390ed7d12de9ec767Joel Becker for (i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) { 599798db35f4649eac2778381c390ed7d12de9ec767Joel Becker rec = &el->l_recs[i]; 6008b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker ret = ocfs2_free_clusters(handle, cluster_ac->ac_inode, 6018b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker cluster_ac->ac_bh, 6028b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker le64_to_cpu(rec->e_blkno), 60372094e43e3af5020510f920321d71f1798fa896dAl Viro le16_to_cpu(rec->e_leaf_clusters)); 6048b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker if (ret) 6058b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker mlog_errno(ret); 6068b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker /* Try all the clusters to free */ 607798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 608798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 609798db35f4649eac2778381c390ed7d12de9ec767Joel Becker ocfs2_remove_from_cache(INODE_CACHE(alloc_inode), bg_bh); 610798db35f4649eac2778381c390ed7d12de9ec767Joel Becker brelse(bg_bh); 611798db35f4649eac2778381c390ed7d12de9ec767Joel Becker} 612798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 613798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerstatic struct buffer_head * 614798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerocfs2_block_group_alloc_discontig(handle_t *handle, 615798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct inode *alloc_inode, 616798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_alloc_context *ac, 6178b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker struct ocfs2_chain_list *cl) 618798db35f4649eac2778381c390ed7d12de9ec767Joel Becker{ 619798db35f4649eac2778381c390ed7d12de9ec767Joel Becker int status; 620798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u32 bit_off, num_bits; 621798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u64 bg_blkno; 622798db35f4649eac2778381c390ed7d12de9ec767Joel Becker unsigned int min_bits = le16_to_cpu(cl->cl_cpg) >> 1; 623798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct buffer_head *bg_bh = NULL; 624798db35f4649eac2778381c390ed7d12de9ec767Joel Becker unsigned int alloc_rec = ocfs2_find_smallest_chain(cl); 625798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); 626798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 6274711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma if (!ocfs2_supports_discontig_bg(osb)) { 628798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = -ENOSPC; 629798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 630798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 631798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 6328b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker status = ocfs2_extend_trans(handle, 6338b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker ocfs2_calc_bg_discontig_credits(osb->sb)); 6348b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker if (status) { 6358b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker mlog_errno(status); 6368b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker goto bail; 6378b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker } 6388b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker 63995ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker /* 64095ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker * We're going to be grabbing from multiple cluster groups. 64195ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker * We don't have enough credits to relink them all, and the 64295ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker * cluster groups will be staying in cache for the duration of 64395ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker * this operation. 64495ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker */ 645309a85b6861fedbb48a22d45e0e079d1be993b3aXiaowei.Hu ac->ac_disable_chain_relink = 1; 64695ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker 647798db35f4649eac2778381c390ed7d12de9ec767Joel Becker /* Claim the first region */ 648798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = ocfs2_block_group_claim_bits(osb, handle, ac, min_bits, 649798db35f4649eac2778381c390ed7d12de9ec767Joel Becker &bit_off, &num_bits); 650798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status < 0) { 651798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status != -ENOSPC) 652798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 653798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 654798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 655798db35f4649eac2778381c390ed7d12de9ec767Joel Becker min_bits = num_bits; 656798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 657798db35f4649eac2778381c390ed7d12de9ec767Joel Becker /* setup the group */ 658798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_blkno = ocfs2_clusters_to_blocks(osb->sb, bit_off); 6592f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_block_group_alloc_discontig( 6602f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma (unsigned long long)bg_blkno, alloc_rec); 661798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 662798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh = sb_getblk(osb->sb, bg_blkno); 663798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (!bg_bh) { 6647391a294b861bf2c3b762dfdcf61b9c5f1bffa1fRui Xiang status = -ENOMEM; 665798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 666798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 667798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 668798db35f4649eac2778381c390ed7d12de9ec767Joel Becker ocfs2_set_new_buffer_uptodate(INODE_CACHE(alloc_inode), bg_bh); 669798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 670798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = ocfs2_block_group_fill(handle, alloc_inode, bg_bh, 671798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_blkno, num_bits, alloc_rec, cl); 672798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status < 0) { 673798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 674798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 675798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 676798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 677798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = ocfs2_block_group_grow_discontig(handle, alloc_inode, 678798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh, ac, cl, min_bits); 679798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status) 680798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 681798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 682798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerbail: 683798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status) 6848b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker ocfs2_bg_alloc_cleanup(handle, ac, alloc_inode, bg_bh); 685798db35f4649eac2778381c390ed7d12de9ec767Joel Becker return status ? ERR_PTR(status) : bg_bh; 686798db35f4649eac2778381c390ed7d12de9ec767Joel Becker} 687798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 688ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* 689ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * We expect the block group allocator to already be locked. 690ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh */ 691ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_block_group_alloc(struct ocfs2_super *osb, 692ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode, 6931187c968852e3c668f3b9376083851f81f6eee22Joel Becker struct buffer_head *bh, 69460ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma u64 max_block, 695feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma u64 *last_alloc_group, 69660ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma int flags) 697ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 698ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status, credits; 699ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data; 700ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_chain_list *cl; 701ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_alloc_context *ac = NULL; 7021fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fasheh handle_t *handle = NULL; 7034711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma u16 alloc_rec; 704ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *bg_bh = NULL; 705ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg; 706ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 707ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ocfs2_is_cluster_bitmap(alloc_inode)); 708ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 709ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh cl = &fe->id2.i_chain; 7101187c968852e3c668f3b9376083851f81f6eee22Joel Becker status = ocfs2_reserve_clusters_with_limit(osb, 7111187c968852e3c668f3b9376083851f81f6eee22Joel Becker le16_to_cpu(cl->cl_cpg), 71260ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma max_block, flags, &ac); 713ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 714ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 715ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 716ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 717ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 718ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 719ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh credits = ocfs2_calc_group_alloc_credits(osb->sb, 720ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le16_to_cpu(cl->cl_cpg)); 72165eff9ccf86d63eb5c3e9071450a36e4e4fa9564Mark Fasheh handle = ocfs2_start_trans(osb, credits); 722ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (IS_ERR(handle)) { 723ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = PTR_ERR(handle); 724ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh handle = NULL; 725ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 726ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 727ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 728ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 729feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma if (last_alloc_group && *last_alloc_group != 0) { 7302f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_block_group_alloc( 7312f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma (unsigned long long)*last_alloc_group); 732feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma ac->ac_last_group = *last_alloc_group; 733feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma } 734798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 735798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh = ocfs2_block_group_alloc_contig(osb, handle, alloc_inode, 736798db35f4649eac2778381c390ed7d12de9ec767Joel Becker ac, cl); 737798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (IS_ERR(bg_bh) && (PTR_ERR(bg_bh) == -ENOSPC)) 738798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh = ocfs2_block_group_alloc_discontig(handle, 739798db35f4649eac2778381c390ed7d12de9ec767Joel Becker alloc_inode, 7408b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker ac, cl); 741798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (IS_ERR(bg_bh)) { 742798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = PTR_ERR(bg_bh); 743798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh = NULL; 744ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 745ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 746ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 747ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 748ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg = (struct ocfs2_group_desc *) bg_bh->b_data; 749ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 7500cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), 75113723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker bh, OCFS2_JOURNAL_ACCESS_WRITE); 752ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 753ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 754ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 755ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 756ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 7574711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma alloc_rec = le16_to_cpu(bg->bg_chain); 7584711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma le32_add_cpu(&cl->cl_recs[alloc_rec].c_free, 759ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le16_to_cpu(bg->bg_free_bits_count)); 7604711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma le32_add_cpu(&cl->cl_recs[alloc_rec].c_total, 761798db35f4649eac2778381c390ed7d12de9ec767Joel Becker le16_to_cpu(bg->bg_bits)); 7620a463b74e7e6856b24e613de2b85237c6e11890bTao Ma cl->cl_recs[alloc_rec].c_blkno = bg->bg_blkno; 763ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (le16_to_cpu(cl->cl_next_free_rec) < le16_to_cpu(cl->cl_count)) 764ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le16_add_cpu(&cl->cl_next_free_rec, 1); 765ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 766ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_add_cpu(&fe->id1.bitmap1.i_used, le16_to_cpu(bg->bg_bits) - 767ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le16_to_cpu(bg->bg_free_bits_count)); 768ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_add_cpu(&fe->id1.bitmap1.i_total, le16_to_cpu(bg->bg_bits)); 769ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_add_cpu(&fe->i_clusters, le16_to_cpu(cl->cl_cpg)); 770ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 771ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, bh); 772ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 773ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh spin_lock(&OCFS2_I(alloc_inode)->ip_lock); 774ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh OCFS2_I(alloc_inode)->ip_clusters = le32_to_cpu(fe->i_clusters); 775ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe->i_size = cpu_to_le64(ocfs2_clusters_to_bytes(alloc_inode->i_sb, 776ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->i_clusters))); 777ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh spin_unlock(&OCFS2_I(alloc_inode)->ip_lock); 778ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh i_size_write(alloc_inode, le64_to_cpu(fe->i_size)); 7798110b073a9135acf0a71bccfc20c0d1023f179c6Mark Fasheh alloc_inode->i_blocks = ocfs2_inode_sector_count(alloc_inode); 780ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 781ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = 0; 782feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma 783feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma /* save the new last alloc group so that the caller can cache it. */ 784feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma if (last_alloc_group) 785feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma *last_alloc_group = ac->ac_last_group; 786feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma 787ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 788ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (handle) 78902dc1af44e9fa4b8801169891b3a1ba4047537adMark Fasheh ocfs2_commit_trans(osb, handle); 790ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 791ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (ac) 792ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_free_alloc_context(ac); 793ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 794a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh brelse(bg_bh); 795ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 796c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma if (status) 797c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma mlog_errno(status); 798ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 799ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 800ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 801ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_reserve_suballoc_bits(struct ocfs2_super *osb, 802da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh struct ocfs2_alloc_context *ac, 803da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh int type, 804ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma u32 slot, 805feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma u64 *last_alloc_group, 80660ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma int flags) 807ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 808ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 809ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted = ac->ac_bits_wanted; 810da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh struct inode *alloc_inode; 811ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *bh = NULL; 812ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe; 813ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 free_bits; 814ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 815da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh alloc_inode = ocfs2_get_system_file_inode(osb, type, slot); 816da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh if (!alloc_inode) { 817da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh mlog_errno(-EINVAL); 818da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh return -EINVAL; 819da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh } 820ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 821da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh mutex_lock(&alloc_inode->i_mutex); 822da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh 823e63aecb651ba73dffc62f9608ee1b7ae2a0ffd4bMark Fasheh status = ocfs2_inode_lock(alloc_inode, &bh, 1); 824ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 825da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh mutex_unlock(&alloc_inode->i_mutex); 826da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh iput(alloc_inode); 827da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh 828ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 829da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh return status; 830ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 831ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 832da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh ac->ac_inode = alloc_inode; 833a4a4891164d4f6f383cc17e7c90828a7ca6a1146Tao Ma ac->ac_alloc_slot = slot; 834da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh 835ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe = (struct ocfs2_dinode *) bh->b_data; 83610995aa2451afa20b721cc7de856cae1a13dba57Joel Becker 83710995aa2451afa20b721cc7de856cae1a13dba57Joel Becker /* The bh was validated by the inode read inside 83810995aa2451afa20b721cc7de856cae1a13dba57Joel Becker * ocfs2_inode_lock(). Any corruption is a code bug. */ 83910995aa2451afa20b721cc7de856cae1a13dba57Joel Becker BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); 84010995aa2451afa20b721cc7de856cae1a13dba57Joel Becker 841ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!(fe->i_flags & cpu_to_le32(OCFS2_CHAIN_FL))) { 842b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh ocfs2_error(alloc_inode->i_sb, "Invalid chain allocator %llu", 843b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)le64_to_cpu(fe->i_blkno)); 844ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -EIO; 845ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 846ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 847ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 848ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh free_bits = le32_to_cpu(fe->id1.bitmap1.i_total) - 849ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->id1.bitmap1.i_used); 850ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 851ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (bits_wanted > free_bits) { 852ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* cluster bitmap never grows */ 853ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (ocfs2_is_cluster_bitmap(alloc_inode)) { 8542f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_reserve_suballoc_bits_nospc(bits_wanted, 8552f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma free_bits); 856ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOSPC; 857ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 858ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 859ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 86060ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma if (!(flags & ALLOC_NEW_GROUP)) { 8612f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_reserve_suballoc_bits_no_new_group( 8622f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma slot, bits_wanted, free_bits); 863ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma status = -ENOSPC; 864ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma goto bail; 865ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma } 866ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma 8671187c968852e3c668f3b9376083851f81f6eee22Joel Becker status = ocfs2_block_group_alloc(osb, alloc_inode, bh, 868feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma ac->ac_max_block, 869feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma last_alloc_group, flags); 870ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 871ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 872ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 873ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 874ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 875ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh atomic_inc(&osb->alloc_stats.bg_extends); 876ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 877ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* You should never ask for this much metadata */ 878ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(bits_wanted > 879ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (le32_to_cpu(fe->id1.bitmap1.i_total) 880ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh - le32_to_cpu(fe->id1.bitmap1.i_used))); 881ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 882ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 883ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh get_bh(bh); 884ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_bh = bh; 885ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 886a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh brelse(bh); 887ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 888c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma if (status) 889c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma mlog_errno(status); 890ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 891ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 892ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 893b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb) 894b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 895b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_lock(&osb->osb_lock); 896b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang osb->s_inode_steal_slot = OCFS2_INVALID_SLOT; 897b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_unlock(&osb->osb_lock); 898b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang atomic_set(&osb->s_num_inodes_stolen, 0); 899b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 900b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 901b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic void ocfs2_init_meta_steal_slot(struct ocfs2_super *osb) 902b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 903b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_lock(&osb->osb_lock); 904b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang osb->s_meta_steal_slot = OCFS2_INVALID_SLOT; 905b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_unlock(&osb->osb_lock); 906b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang atomic_set(&osb->s_num_meta_stolen, 0); 907b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 908b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 909b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangvoid ocfs2_init_steal_slots(struct ocfs2_super *osb) 910b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 911b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang ocfs2_init_inode_steal_slot(osb); 912b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang ocfs2_init_meta_steal_slot(osb); 913b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 914b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 915b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic void __ocfs2_set_steal_slot(struct ocfs2_super *osb, int slot, int type) 916b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 917b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_lock(&osb->osb_lock); 918b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (type == INODE_ALLOC_SYSTEM_INODE) 919b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang osb->s_inode_steal_slot = slot; 920b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang else if (type == EXTENT_ALLOC_SYSTEM_INODE) 921b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang osb->s_meta_steal_slot = slot; 922b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_unlock(&osb->osb_lock); 923b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 924b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 925b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic int __ocfs2_get_steal_slot(struct ocfs2_super *osb, int type) 926b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 927b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang int slot = OCFS2_INVALID_SLOT; 928b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 929b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_lock(&osb->osb_lock); 930b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (type == INODE_ALLOC_SYSTEM_INODE) 931b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang slot = osb->s_inode_steal_slot; 932b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang else if (type == EXTENT_ALLOC_SYSTEM_INODE) 933b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang slot = osb->s_meta_steal_slot; 934b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_unlock(&osb->osb_lock); 935b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 936b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang return slot; 937b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 938b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 939b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic int ocfs2_get_inode_steal_slot(struct ocfs2_super *osb) 940b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 941b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang return __ocfs2_get_steal_slot(osb, INODE_ALLOC_SYSTEM_INODE); 942b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 943b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 944b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic int ocfs2_get_meta_steal_slot(struct ocfs2_super *osb) 945b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 946b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang return __ocfs2_get_steal_slot(osb, EXTENT_ALLOC_SYSTEM_INODE); 947b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 948b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 949b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic int ocfs2_steal_resource(struct ocfs2_super *osb, 950b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang struct ocfs2_alloc_context *ac, 951b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang int type) 952b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 953b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang int i, status = -ENOSPC; 954b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang int slot = __ocfs2_get_steal_slot(osb, type); 955b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 956b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang /* Start to steal resource from the first slot after ours. */ 957b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (slot == OCFS2_INVALID_SLOT) 958b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang slot = osb->slot_num + 1; 959b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 960b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang for (i = 0; i < osb->max_slots; i++, slot++) { 961b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (slot == osb->max_slots) 962b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang slot = 0; 963b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 964b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (slot == osb->slot_num) 965b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang continue; 966b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 967b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang status = ocfs2_reserve_suballoc_bits(osb, ac, 968b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang type, 969b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang (u32)slot, NULL, 970b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang NOT_ALLOC_NEW_GROUP); 971b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (status >= 0) { 972b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang __ocfs2_set_steal_slot(osb, slot, type); 973b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang break; 974b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang } 975b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 976b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang ocfs2_free_ac_resource(ac); 977b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang } 978b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 979b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang return status; 980b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 981b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 982b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic int ocfs2_steal_inode(struct ocfs2_super *osb, 983b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang struct ocfs2_alloc_context *ac) 984b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 985b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang return ocfs2_steal_resource(osb, ac, INODE_ALLOC_SYSTEM_INODE); 986b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 987b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 988b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic int ocfs2_steal_meta(struct ocfs2_super *osb, 989b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang struct ocfs2_alloc_context *ac) 990b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 991b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang return ocfs2_steal_resource(osb, ac, EXTENT_ALLOC_SYSTEM_INODE); 992b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 993b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 994cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yangint ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb, 995cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang int blocks, 996cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang struct ocfs2_alloc_context **ac) 997ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 998ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 999b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang int slot = ocfs2_get_meta_steal_slot(osb); 1000ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1001cd86128088554d64fea1679191509f00e6353c5bRobert P. J. Day *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); 1002ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!(*ac)) { 1003ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOMEM; 1004ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1005ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1006ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1007ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1008cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang (*ac)->ac_bits_wanted = blocks; 1009ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (*ac)->ac_which = OCFS2_AC_USE_META; 1010ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (*ac)->ac_group_search = ocfs2_block_group_search; 1011ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1012b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (slot != OCFS2_INVALID_SLOT && 1013b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang atomic_read(&osb->s_num_meta_stolen) < OCFS2_MAX_TO_STEAL) 1014b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang goto extent_steal; 1015b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 1016b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang atomic_set(&osb->s_num_meta_stolen, 0); 1017da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh status = ocfs2_reserve_suballoc_bits(osb, (*ac), 1018ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma EXTENT_ALLOC_SYSTEM_INODE, 1019b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang (u32)osb->slot_num, NULL, 102033d5d380d667ad264675cfdb297dfc3c5b6542ccMark Fasheh ALLOC_GROUPS_FROM_GLOBAL|ALLOC_NEW_GROUP); 1021b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 1022b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 1023b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (status >= 0) { 1024b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang status = 0; 1025b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (slot != OCFS2_INVALID_SLOT) 1026b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang ocfs2_init_meta_steal_slot(osb); 1027b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang goto bail; 1028b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang } else if (status < 0 && status != -ENOSPC) { 1029b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang mlog_errno(status); 1030b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang goto bail; 1031b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang } 1032b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 1033b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang ocfs2_free_ac_resource(*ac); 1034b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 1035b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangextent_steal: 1036b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang status = ocfs2_steal_meta(osb, *ac); 1037b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang atomic_inc(&osb->s_num_meta_stolen); 1038ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1039ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 1040ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1041ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1042ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1043ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1044ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = 0; 1045ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 1046ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if ((status < 0) && *ac) { 1047ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_free_alloc_context(*ac); 1048ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *ac = NULL; 1049ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1050ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1051c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma if (status) 1052c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma mlog_errno(status); 1053ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1054ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1055ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1056cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yangint ocfs2_reserve_new_metadata(struct ocfs2_super *osb, 1057cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang struct ocfs2_extent_list *root_el, 1058cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang struct ocfs2_alloc_context **ac) 1059cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang{ 1060cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang return ocfs2_reserve_new_metadata_blocks(osb, 1061cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang ocfs2_extend_meta_needed(root_el), 1062cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang ac); 1063cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang} 1064cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang 1065ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehint ocfs2_reserve_new_inode(struct ocfs2_super *osb, 1066ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_alloc_context **ac) 1067ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1068ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1069b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang int slot = ocfs2_get_inode_steal_slot(osb); 1070feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma u64 alloc_group; 1071ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1072cd86128088554d64fea1679191509f00e6353c5bRobert P. J. Day *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); 1073ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!(*ac)) { 1074ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOMEM; 1075ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1076ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1077ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1078ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1079ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (*ac)->ac_bits_wanted = 1; 1080ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (*ac)->ac_which = OCFS2_AC_USE_INODE; 1081ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1082ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (*ac)->ac_group_search = ocfs2_block_group_search; 1083ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 10844d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma /* 10851187c968852e3c668f3b9376083851f81f6eee22Joel Becker * stat(2) can't handle i_ino > 32bits, so we tell the 10861187c968852e3c668f3b9376083851f81f6eee22Joel Becker * lower levels not to allocate us a block group past that 108712462f1d9f0b96389497438dc2730c6f7410be82Joel Becker * limit. The 'inode64' mount option avoids this behavior. 10881187c968852e3c668f3b9376083851f81f6eee22Joel Becker */ 108912462f1d9f0b96389497438dc2730c6f7410be82Joel Becker if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64)) 109012462f1d9f0b96389497438dc2730c6f7410be82Joel Becker (*ac)->ac_max_block = (u32)~0U; 10911187c968852e3c668f3b9376083851f81f6eee22Joel Becker 10921187c968852e3c668f3b9376083851f81f6eee22Joel Becker /* 10934d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * slot is set when we successfully steal inode from other nodes. 10944d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * It is reset in 3 places: 10954d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * 1. when we flush the truncate log 10964d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * 2. when we complete local alloc recovery. 10974d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * 3. when we successfully allocate from our own slot. 10984d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * After it is set, we will go on stealing inodes until we find the 10994d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * need to check our slots to see whether there is some space for us. 11004d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma */ 11014d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma if (slot != OCFS2_INVALID_SLOT && 1102b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang atomic_read(&osb->s_num_inodes_stolen) < OCFS2_MAX_TO_STEAL) 11034d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma goto inode_steal; 11044d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma 11054d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma atomic_set(&osb->s_num_inodes_stolen, 0); 1106feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma alloc_group = osb->osb_inode_alloc_group; 1107da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh status = ocfs2_reserve_suballoc_bits(osb, *ac, 1108da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh INODE_ALLOC_SYSTEM_INODE, 1109b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang (u32)osb->slot_num, 1110feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma &alloc_group, 111160ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma ALLOC_NEW_GROUP | 111260ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma ALLOC_GROUPS_FROM_GLOBAL); 11134d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma if (status >= 0) { 11144d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma status = 0; 11154d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma 1116feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma spin_lock(&osb->osb_lock); 1117feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma osb->osb_inode_alloc_group = alloc_group; 1118feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma spin_unlock(&osb->osb_lock); 11192f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_reserve_new_inode_new_group( 11202f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma (unsigned long long)alloc_group); 1121feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma 11224d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma /* 11234d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * Some inodes must be freed by us, so try to allocate 11244d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * from our own next time. 11254d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma */ 11264d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma if (slot != OCFS2_INVALID_SLOT) 11274d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma ocfs2_init_inode_steal_slot(osb); 11284d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma goto bail; 11294d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma } else if (status < 0 && status != -ENOSPC) { 11304d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma mlog_errno(status); 11314d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma goto bail; 11324d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma } 11334d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma 11344d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma ocfs2_free_ac_resource(*ac); 11354d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma 11364d0ddb2ce25db2254d468233d942276ecf40bff8Tao Mainode_steal: 1137b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang status = ocfs2_steal_inode(osb, *ac); 11384d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma atomic_inc(&osb->s_num_inodes_stolen); 1139ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1140ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 1141ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1142ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1143ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1144ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1145ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = 0; 1146ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 1147ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if ((status < 0) && *ac) { 1148ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_free_alloc_context(*ac); 1149ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *ac = NULL; 1150ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1151ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1152c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma if (status) 1153c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma mlog_errno(status); 1154ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1155ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1156ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1157ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* local alloc code has to do the same thing, so rather than do this 1158ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * twice.. */ 1159ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehint ocfs2_reserve_cluster_bitmap_bits(struct ocfs2_super *osb, 1160ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_alloc_context *ac) 1161ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1162ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1163ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1164ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_which = OCFS2_AC_USE_MAIN; 1165ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_group_search = ocfs2_cluster_group_search; 1166ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1167da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh status = ocfs2_reserve_suballoc_bits(osb, ac, 1168da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh GLOBAL_BITMAP_SYSTEM_INODE, 1169feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma OCFS2_INVALID_SLOT, NULL, 1170ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma ALLOC_NEW_GROUP); 1171da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh if (status < 0 && status != -ENOSPC) { 1172ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1173da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh goto bail; 1174da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh } 1175da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh 1176ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 1177ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1178ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1179ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1180ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* Callers don't need to care which bitmap (local alloc or main) to 1181ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * use so we figure it out for them, but unfortunately this clutters 1182ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * things a bit. */ 11831187c968852e3c668f3b9376083851f81f6eee22Joel Beckerstatic int ocfs2_reserve_clusters_with_limit(struct ocfs2_super *osb, 11841187c968852e3c668f3b9376083851f81f6eee22Joel Becker u32 bits_wanted, u64 max_block, 118560ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma int flags, 11861187c968852e3c668f3b9376083851f81f6eee22Joel Becker struct ocfs2_alloc_context **ac) 1187ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1188ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1189ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1190cd86128088554d64fea1679191509f00e6353c5bRobert P. J. Day *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); 1191ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!(*ac)) { 1192ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOMEM; 1193ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1194ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1195ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1196ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1197ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (*ac)->ac_bits_wanted = bits_wanted; 11981187c968852e3c668f3b9376083851f81f6eee22Joel Becker (*ac)->ac_max_block = max_block; 1199ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1200ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOSPC; 120160ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma if (!(flags & ALLOC_GROUPS_FROM_GLOBAL) && 120260ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma ocfs2_alloc_should_use_local(osb, bits_wanted)) { 1203ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = ocfs2_reserve_local_alloc_bits(osb, 1204ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bits_wanted, 1205ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *ac); 1206a57c8fd2ad238258cc983049008aea5f985804b2Mark Fasheh if ((status < 0) && (status != -ENOSPC)) { 1207ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1208ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1209ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1210ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1211ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1212ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status == -ENOSPC) { 1213ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = ocfs2_reserve_cluster_bitmap_bits(osb, *ac); 1214ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1215ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 1216ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1217ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1218ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1219ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1220ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1221ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = 0; 1222ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 1223ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if ((status < 0) && *ac) { 1224ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_free_alloc_context(*ac); 1225ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *ac = NULL; 1226ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1227ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1228c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma if (status) 1229c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma mlog_errno(status); 1230ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1231ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1232ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 12331187c968852e3c668f3b9376083851f81f6eee22Joel Beckerint ocfs2_reserve_clusters(struct ocfs2_super *osb, 12341187c968852e3c668f3b9376083851f81f6eee22Joel Becker u32 bits_wanted, 12351187c968852e3c668f3b9376083851f81f6eee22Joel Becker struct ocfs2_alloc_context **ac) 12361187c968852e3c668f3b9376083851f81f6eee22Joel Becker{ 123760ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma return ocfs2_reserve_clusters_with_limit(osb, bits_wanted, 0, 123860ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma ALLOC_NEW_GROUP, ac); 12391187c968852e3c668f3b9376083851f81f6eee22Joel Becker} 12401187c968852e3c668f3b9376083851f81f6eee22Joel Becker 1241ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* 1242ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * More or less lifted from ext3. I'll leave their description below: 1243ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 1244ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * "For ext3 allocations, we must not reuse any blocks which are 1245ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * allocated in the bitmap buffer's "last committed data" copy. This 1246ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * prevents deletes from freeing up the page for reuse until we have 1247ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * committed the delete transaction. 1248ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 1249ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * If we didn't do this, then deleting something and reallocating it as 1250ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * data would allow the old block to be overwritten before the 1251ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * transaction committed (because we force data to disk before commit). 1252ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * This would lead to corruption if we crashed between overwriting the 1253ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * data and committing the delete. 1254ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 1255ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * @@@ We may want to make this allocation behaviour conditional on 1256ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * data-writes at some point, and disable it for metadata allocations or 1257ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * sync-data inodes." 1258ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 1259ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * Note: OCFS2 already does this differently for metadata vs data 1260c78bad11fbf1272ea021f56458025dc98486d6f4Joe Perches * allocations, as those bitmaps are separate and undo access is never 1261ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * called on a metadata group descriptor. 1262ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh */ 1263ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_test_bg_bit_allocatable(struct buffer_head *bg_bh, 1264ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int nr) 1265ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1266ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; 126794e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran int ret; 1268ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1269ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (ocfs2_test_bit(nr, (unsigned long *)bg->bg_bitmap)) 1270ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return 0; 127194e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran 127294e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran if (!buffer_jbd(bg_bh)) 1273ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return 1; 1274ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 127594e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran jbd_lock_bh_state(bg_bh); 1276ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg = (struct ocfs2_group_desc *) bh2jh(bg_bh)->b_committed_data; 127794e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran if (bg) 127894e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran ret = !ocfs2_test_bit(nr, (unsigned long *)bg->bg_bitmap); 127994e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran else 128094e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran ret = 1; 128194e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran jbd_unlock_bh_state(bg_bh); 128294e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran 128394e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran return ret; 1284ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1285ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1286ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_block_group_find_clear_bits(struct ocfs2_super *osb, 1287ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *bg_bh, 1288ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh unsigned int bits_wanted, 12897bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh unsigned int total_bits, 12907d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res) 1291ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1292ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh void *bitmap; 1293ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 best_offset, best_size; 1294ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int offset, start, found, status = 0; 1295ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; 1296ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 12974203530613280281868b3ca36c817530bca3825cJoel Becker /* Callers got this descriptor from 12984203530613280281868b3ca36c817530bca3825cJoel Becker * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ 12994203530613280281868b3ca36c817530bca3825cJoel Becker BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); 1300ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1301ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh found = start = best_offset = best_size = 0; 1302ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bitmap = bg->bg_bitmap; 1303ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 13047bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh while((offset = ocfs2_find_next_zero_bit(bitmap, total_bits, start)) != -1) { 13057bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh if (offset == total_bits) 1306ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh break; 1307ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1308ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!ocfs2_test_bg_bit_allocatable(bg_bh, offset)) { 1309ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* We found a zero, but we can't use it as it 1310ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * hasn't been put to disk yet! */ 1311ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh found = 0; 1312ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh start = offset + 1; 1313ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } else if (offset == start) { 1314ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* we found a zero */ 1315ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh found++; 1316ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* move start to the next bit to test */ 1317ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh start++; 1318ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } else { 1319ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* got a zero after some ones */ 1320ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh found = 1; 1321ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh start = offset + 1; 1322ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1323ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (found > best_size) { 1324ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh best_size = found; 1325ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh best_offset = start - found; 1326ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1327ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* we got everything we needed */ 1328ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (found == bits_wanted) { 1329ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* mlog(0, "Found it all!\n"); */ 1330ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh break; 1331ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1332ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1333ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 13347d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker if (best_size) { 13357d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bit_offset = best_offset; 13367d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bits = best_size; 1337ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } else { 1338ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOSPC; 1339ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* No error log here -- see the comment above 1340ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * ocfs2_test_bg_bit_allocatable */ 1341ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1342ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1343ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1344ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1345ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 13461fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fashehstatic inline int ocfs2_block_group_set_bits(handle_t *handle, 1347ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode, 1348ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg, 1349ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh, 1350ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh unsigned int bit_off, 1351ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh unsigned int num_bits) 1352ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1353ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1354ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh void *bitmap = bg->bg_bitmap; 1355ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int journal_type = OCFS2_JOURNAL_ACCESS_WRITE; 1356ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 13574203530613280281868b3ca36c817530bca3825cJoel Becker /* All callers get the descriptor via 13584203530613280281868b3ca36c817530bca3825cJoel Becker * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ 13594203530613280281868b3ca36c817530bca3825cJoel Becker BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); 1360ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(le16_to_cpu(bg->bg_free_bits_count) < num_bits); 1361ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 13622f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_block_group_set_bits(bit_off, num_bits); 1363ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1364ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (ocfs2_is_cluster_bitmap(alloc_inode)) 1365ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh journal_type = OCFS2_JOURNAL_ACCESS_UNDO; 1366ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 136713723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker status = ocfs2_journal_access_gd(handle, 13680cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker INODE_CACHE(alloc_inode), 136913723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker group_bh, 137013723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker journal_type); 1371ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1372ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1373ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1374ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1375ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1376ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le16_add_cpu(&bg->bg_free_bits_count, -num_bits); 13779b5cd10e4c14a1a642076ace6a73be3d33c91fb6Srinivas Eeda if (le16_to_cpu(bg->bg_free_bits_count) > le16_to_cpu(bg->bg_bits)) { 13789b5cd10e4c14a1a642076ace6a73be3d33c91fb6Srinivas Eeda ocfs2_error(alloc_inode->i_sb, "Group descriptor # %llu has bit" 13799b5cd10e4c14a1a642076ace6a73be3d33c91fb6Srinivas Eeda " count %u but claims %u are freed. num_bits %d", 13809b5cd10e4c14a1a642076ace6a73be3d33c91fb6Srinivas Eeda (unsigned long long)le64_to_cpu(bg->bg_blkno), 13819b5cd10e4c14a1a642076ace6a73be3d33c91fb6Srinivas Eeda le16_to_cpu(bg->bg_bits), 13829b5cd10e4c14a1a642076ace6a73be3d33c91fb6Srinivas Eeda le16_to_cpu(bg->bg_free_bits_count), num_bits); 13839b5cd10e4c14a1a642076ace6a73be3d33c91fb6Srinivas Eeda return -EROFS; 13849b5cd10e4c14a1a642076ace6a73be3d33c91fb6Srinivas Eeda } 1385ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh while(num_bits--) 1386ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_set_bit(bit_off++, bitmap); 1387ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1388ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, group_bh); 1389ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1390ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 1391c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma if (status) 1392c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma mlog_errno(status); 1393ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1394ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1395ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1396ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* find the one with the most empty bits */ 1397ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline u16 ocfs2_find_victim_chain(struct ocfs2_chain_list *cl) 1398ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1399ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 curr, best; 1400ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1401ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!cl->cl_next_free_rec); 1402ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1403ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh best = curr = 0; 1404ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh while (curr < le16_to_cpu(cl->cl_next_free_rec)) { 1405ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (le32_to_cpu(cl->cl_recs[curr].c_free) > 1406ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(cl->cl_recs[best].c_free)) 1407ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh best = curr; 1408ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh curr++; 1409ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1410ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1411ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(best >= le16_to_cpu(cl->cl_next_free_rec)); 1412ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return best; 1413ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1414ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 14151fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fashehstatic int ocfs2_relink_block_group(handle_t *handle, 1416ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode, 1417ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *fe_bh, 1418ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *bg_bh, 1419ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *prev_bg_bh, 1420ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 chain) 1421ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1422ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1423ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* there is a really tiny chance the journal calls could fail, 1424ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * but we wouldn't want inconsistent blocks in *any* case. */ 1425493098413bdb45f223ff0552e2f734849491dbbeJie Liu u64 bg_ptr, prev_bg_ptr; 1426ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; 1427ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; 1428ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *prev_bg = (struct ocfs2_group_desc *) prev_bg_bh->b_data; 1429ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 14304203530613280281868b3ca36c817530bca3825cJoel Becker /* The caller got these descriptors from 14314203530613280281868b3ca36c817530bca3825cJoel Becker * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ 14324203530613280281868b3ca36c817530bca3825cJoel Becker BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); 14334203530613280281868b3ca36c817530bca3825cJoel Becker BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(prev_bg)); 1434ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 14352f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_relink_block_group( 14362f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma (unsigned long long)le64_to_cpu(fe->i_blkno), chain, 14372f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma (unsigned long long)le64_to_cpu(bg->bg_blkno), 14382f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma (unsigned long long)le64_to_cpu(prev_bg->bg_blkno)); 1439ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1440ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg_ptr = le64_to_cpu(bg->bg_next_group); 1441ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh prev_bg_ptr = le64_to_cpu(prev_bg->bg_next_group); 1442ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 14430cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), 14440cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker prev_bg_bh, 144513723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker OCFS2_JOURNAL_ACCESS_WRITE); 144625e2892101ba541dce8593c698d70ccc278bc1fdAndrew Morton if (status < 0) 1447493098413bdb45f223ff0552e2f734849491dbbeJie Liu goto out; 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); 145425e2892101ba541dce8593c698d70ccc278bc1fdAndrew Morton if (status < 0) 1455493098413bdb45f223ff0552e2f734849491dbbeJie Liu goto out_rollback_prev_bg; 1456ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1457ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_next_group = fe->id2.i_chain.cl_recs[chain].c_blkno; 1458ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, bg_bh); 1459ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 14600cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), 14610cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker fe_bh, OCFS2_JOURNAL_ACCESS_WRITE); 146225e2892101ba541dce8593c698d70ccc278bc1fdAndrew Morton if (status < 0) 1463493098413bdb45f223ff0552e2f734849491dbbeJie Liu goto out_rollback_bg; 1464ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1465ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe->id2.i_chain.cl_recs[chain].c_blkno = bg->bg_blkno; 1466ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, fe_bh); 1467ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1468493098413bdb45f223ff0552e2f734849491dbbeJie Liuout: 146925e2892101ba541dce8593c698d70ccc278bc1fdAndrew Morton if (status < 0) 147025e2892101ba541dce8593c698d70ccc278bc1fdAndrew Morton mlog_errno(status); 1471493098413bdb45f223ff0552e2f734849491dbbeJie Liu return status; 14724203530613280281868b3ca36c817530bca3825cJoel Becker 1473493098413bdb45f223ff0552e2f734849491dbbeJie Liuout_rollback_bg: 1474493098413bdb45f223ff0552e2f734849491dbbeJie Liu bg->bg_next_group = cpu_to_le64(bg_ptr); 1475493098413bdb45f223ff0552e2f734849491dbbeJie Liuout_rollback_prev_bg: 1476493098413bdb45f223ff0552e2f734849491dbbeJie Liu prev_bg->bg_next_group = cpu_to_le64(prev_bg_ptr); 147725e2892101ba541dce8593c698d70ccc278bc1fdAndrew Morton goto out; 1478ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1479ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1480ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg, 1481ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 wanted) 1482ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1483ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return le16_to_cpu(bg->bg_free_bits_count) > wanted; 1484ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1485ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1486ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* return 0 on success, -ENOSPC to keep searching and any other < 0 1487ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * value on error. */ 1488ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_cluster_group_search(struct inode *inode, 1489ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh, 1490ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, u32 min_bits, 14911187c968852e3c668f3b9376083851f81f6eee22Joel Becker u64 max_block, 14927d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res) 1493ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1494ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int search = -ENOSPC; 1495ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int ret; 14961187c968852e3c668f3b9376083851f81f6eee22Joel Becker u64 blkoff; 14977bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *) group_bh->b_data; 14989c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 14997bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh unsigned int max_bits, gd_cluster_off; 1500ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1501ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ocfs2_is_cluster_bitmap(inode)); 1502ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 15037bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh if (gd->bg_free_bits_count) { 15047bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh max_bits = le16_to_cpu(gd->bg_bits); 15057bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh 15067bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh /* Tail groups in cluster bitmaps which aren't cpg 150725985edcedea6396277003854657b5f3cb31a628Lucas De Marchi * aligned are prone to partial extension by a failed 15087bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh * fs resize. If the file system resize never got to 15097bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh * update the dinode cluster count, then we don't want 15107bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh * to trust any clusters past it, regardless of what 15117bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh * the group descriptor says. */ 15127bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh gd_cluster_off = ocfs2_blocks_to_clusters(inode->i_sb, 15137bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh le64_to_cpu(gd->bg_blkno)); 15147bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh if ((gd_cluster_off + max_bits) > 15157bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh OCFS2_I(inode)->ip_clusters) { 15167bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh max_bits = OCFS2_I(inode)->ip_clusters - gd_cluster_off; 15172f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_cluster_group_search_wrong_max_bits( 15182f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma (unsigned long long)le64_to_cpu(gd->bg_blkno), 15192f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma le16_to_cpu(gd->bg_bits), 15202f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma OCFS2_I(inode)->ip_clusters, max_bits); 15217bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh } 15227bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh 1523ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ret = ocfs2_block_group_find_clear_bits(OCFS2_SB(inode->i_sb), 1524ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group_bh, bits_wanted, 15257d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker max_bits, res); 1526ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (ret) 1527ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return ret; 1528ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 15291187c968852e3c668f3b9376083851f81f6eee22Joel Becker if (max_block) { 15301187c968852e3c668f3b9376083851f81f6eee22Joel Becker blkoff = ocfs2_clusters_to_blocks(inode->i_sb, 15311187c968852e3c668f3b9376083851f81f6eee22Joel Becker gd_cluster_off + 15327d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bit_offset + 15337d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bits); 15342f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_cluster_group_search_max_block( 15352f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma (unsigned long long)blkoff, 15362f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma (unsigned long long)max_block); 15371187c968852e3c668f3b9376083851f81f6eee22Joel Becker if (blkoff > max_block) 15381187c968852e3c668f3b9376083851f81f6eee22Joel Becker return -ENOSPC; 15391187c968852e3c668f3b9376083851f81f6eee22Joel Becker } 15401187c968852e3c668f3b9376083851f81f6eee22Joel Becker 1541ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* ocfs2_block_group_find_clear_bits() might 1542ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * return success, but we still want to return 1543ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * -ENOSPC unless it found the minimum number 1544ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * of bits. */ 15457d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker if (min_bits <= res->sr_bits) 1546ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh search = 0; /* success */ 15477d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker else if (res->sr_bits) { 15489c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh /* 15499c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh * Don't show bits which we'll be returning 15509c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh * for allocation to the local alloc bitmap. 15519c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh */ 15527d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker ocfs2_local_alloc_seen_free_bits(osb, res->sr_bits); 1553ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1554ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1555ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1556ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return search; 1557ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1558ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1559ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_block_group_search(struct inode *inode, 1560ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh, 1561ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, u32 min_bits, 15621187c968852e3c668f3b9376083851f81f6eee22Joel Becker u64 max_block, 15637d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res) 1564ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1565ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int ret = -ENOSPC; 15661187c968852e3c668f3b9376083851f81f6eee22Joel Becker u64 blkoff; 1567ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) group_bh->b_data; 1568ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1569ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(min_bits != 1); 1570ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ocfs2_is_cluster_bitmap(inode)); 1571ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 15721187c968852e3c668f3b9376083851f81f6eee22Joel Becker if (bg->bg_free_bits_count) { 1573ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ret = ocfs2_block_group_find_clear_bits(OCFS2_SB(inode->i_sb), 1574ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group_bh, bits_wanted, 15757bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh le16_to_cpu(bg->bg_bits), 15767d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res); 15771187c968852e3c668f3b9376083851f81f6eee22Joel Becker if (!ret && max_block) { 15787d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker blkoff = le64_to_cpu(bg->bg_blkno) + 15797d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bit_offset + res->sr_bits; 15802f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_block_group_search_max_block( 15812f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma (unsigned long long)blkoff, 15822f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma (unsigned long long)max_block); 15831187c968852e3c668f3b9376083851f81f6eee22Joel Becker if (blkoff > max_block) 15841187c968852e3c668f3b9376083851f81f6eee22Joel Becker ret = -ENOSPC; 15851187c968852e3c668f3b9376083851f81f6eee22Joel Becker } 15861187c968852e3c668f3b9376083851f81f6eee22Joel Becker } 1587ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1588ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return ret; 1589ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1590ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1591883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fashehstatic int ocfs2_alloc_dinode_update_counts(struct inode *inode, 15921fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fasheh handle_t *handle, 1593883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh struct buffer_head *di_bh, 1594883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u32 num_bits, 1595883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u16 chain) 1596883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh{ 1597883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh int ret; 1598883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u32 tmp_used; 1599883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; 1600883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &di->id2.i_chain; 1601883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 16020cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, 160313723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker OCFS2_JOURNAL_ACCESS_WRITE); 1604883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (ret < 0) { 1605883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh mlog_errno(ret); 1606883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh goto out; 1607883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1608883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1609883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh tmp_used = le32_to_cpu(di->id1.bitmap1.i_used); 1610883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh di->id1.bitmap1.i_used = cpu_to_le32(num_bits + tmp_used); 1611883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh le32_add_cpu(&cl->cl_recs[chain].c_free, -num_bits); 1612ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, di_bh); 1613883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1614883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fashehout: 1615883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh return ret; 1616883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh} 1617883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1618ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Beckerstatic int ocfs2_bg_discontig_fix_by_rec(struct ocfs2_suballoc_result *res, 1619ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker struct ocfs2_extent_rec *rec, 1620ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker struct ocfs2_chain_list *cl) 162113e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker{ 162213e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker unsigned int bpc = le16_to_cpu(cl->cl_bpc); 162313e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker unsigned int bitoff = le32_to_cpu(rec->e_cpos) * bpc; 162472094e43e3af5020510f920321d71f1798fa896dAl Viro unsigned int bitcount = le16_to_cpu(rec->e_leaf_clusters) * bpc; 162513e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 162613e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker if (res->sr_bit_offset < bitoff) 162713e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker return 0; 162813e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker if (res->sr_bit_offset >= (bitoff + bitcount)) 162913e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker return 0; 1630ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker res->sr_blkno = le64_to_cpu(rec->e_blkno) + 1631ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker (res->sr_bit_offset - bitoff); 163213e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker if ((res->sr_bit_offset + res->sr_bits) > (bitoff + bitcount)) 163313e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker res->sr_bits = (bitoff + bitcount) - res->sr_bit_offset; 163413e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker return 1; 163513e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker} 163613e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 1637ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Beckerstatic void ocfs2_bg_discontig_fix_result(struct ocfs2_alloc_context *ac, 1638ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker struct ocfs2_group_desc *bg, 1639ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker struct ocfs2_suballoc_result *res) 164013e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker{ 164113e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker int i; 16422b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker u64 bg_blkno = res->sr_bg_blkno; /* Save off */ 164313e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker struct ocfs2_extent_rec *rec; 164413e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker struct ocfs2_dinode *di = (struct ocfs2_dinode *)ac->ac_bh->b_data; 164513e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker struct ocfs2_chain_list *cl = &di->id2.i_chain; 164613e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 1647ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker if (ocfs2_is_cluster_bitmap(ac->ac_inode)) { 1648ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker res->sr_blkno = 0; 164913e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker return; 1650ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker } 165113e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 1652ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker res->sr_blkno = res->sr_bg_blkno + res->sr_bit_offset; 16532b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker res->sr_bg_blkno = 0; /* Clear it for contig block groups */ 16544711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma if (!ocfs2_supports_discontig_bg(OCFS2_SB(ac->ac_inode->i_sb)) || 1655ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker !bg->bg_list.l_next_free_rec) 165613e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker return; 165713e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 165813e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker for (i = 0; i < le16_to_cpu(bg->bg_list.l_next_free_rec); i++) { 165913e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker rec = &bg->bg_list.l_recs[i]; 16602b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker if (ocfs2_bg_discontig_fix_by_rec(res, rec, cl)) { 16612b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker res->sr_bg_blkno = bg_blkno; /* Restore */ 166213e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker break; 16632b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker } 166413e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker } 166513e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker} 166613e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 1667883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fashehstatic int ocfs2_search_one_group(struct ocfs2_alloc_context *ac, 16681fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fasheh handle_t *handle, 1669883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u32 bits_wanted, 1670883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u32 min_bits, 16717d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res, 1672883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u16 *bits_left) 1673883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh{ 1674883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh int ret; 1675883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh struct buffer_head *group_bh = NULL; 1676883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh struct ocfs2_group_desc *gd; 167768f64d471be38631d7196b938d9809802dd467faJoel Becker struct ocfs2_dinode *di = (struct ocfs2_dinode *)ac->ac_bh->b_data; 1678883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh struct inode *alloc_inode = ac->ac_inode; 1679883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 16807d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker ret = ocfs2_read_group_descriptor(alloc_inode, di, 16817d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bg_blkno, &group_bh); 1682883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (ret < 0) { 1683883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh mlog_errno(ret); 1684883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh return ret; 1685883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1686883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1687883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh gd = (struct ocfs2_group_desc *) group_bh->b_data; 1688883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh ret = ac->ac_group_search(alloc_inode, group_bh, bits_wanted, min_bits, 16897d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker ac->ac_max_block, res); 1690883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (ret < 0) { 1691883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (ret != -ENOSPC) 1692883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh mlog_errno(ret); 1693883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh goto out; 1694883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1695883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 169613e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker if (!ret) 1697ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker ocfs2_bg_discontig_fix_result(ac, gd, res); 169813e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 1699e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh /* 1700e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * sr_bg_blkno might have been changed by 1701e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * ocfs2_bg_discontig_fix_result 1702e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh */ 1703e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh res->sr_bg_stable_blkno = group_bh->b_blocknr; 1704e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 1705e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (ac->ac_find_loc_only) 1706e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh goto out_loc_only; 1707e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 1708883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh ret = ocfs2_alloc_dinode_update_counts(alloc_inode, handle, ac->ac_bh, 17097d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bits, 1710883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh le16_to_cpu(gd->bg_chain)); 1711883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (ret < 0) { 1712883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh mlog_errno(ret); 1713883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh goto out; 1714883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1715883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1716883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh ret = ocfs2_block_group_set_bits(handle, alloc_inode, gd, group_bh, 17177d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bit_offset, res->sr_bits); 1718883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (ret < 0) 1719883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh mlog_errno(ret); 1720883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1721e49e27674d1dd2717ad90b21ece8f83102153315Mark Fashehout_loc_only: 1722883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh *bits_left = le16_to_cpu(gd->bg_free_bits_count); 1723883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1724883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fashehout: 1725883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh brelse(group_bh); 1726883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1727883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh return ret; 1728883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh} 1729883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1730ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_search_chain(struct ocfs2_alloc_context *ac, 17311fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fasheh handle_t *handle, 1732ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, 1733ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 min_bits, 17347d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res, 1735883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u16 *bits_left) 1736ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1737ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 17387d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker u16 chain; 1739ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 next_group; 1740ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode = ac->ac_inode; 1741ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh = NULL; 1742ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *prev_group_bh = NULL; 1743ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe = (struct ocfs2_dinode *) ac->ac_bh->b_data; 1744ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; 1745ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg; 1746ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1747ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh chain = ac->ac_chain; 17482f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_search_chain_begin( 17492f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno, 17502f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma bits_wanted, chain); 1751ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 175268f64d471be38631d7196b938d9809802dd467faJoel Becker status = ocfs2_read_group_descriptor(alloc_inode, fe, 175368f64d471be38631d7196b938d9809802dd467faJoel Becker le64_to_cpu(cl->cl_recs[chain].c_blkno), 175468f64d471be38631d7196b938d9809802dd467faJoel Becker &group_bh); 1755ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1756ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1757ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1758ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1759ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg = (struct ocfs2_group_desc *) group_bh->b_data; 1760ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1761ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOSPC; 1762ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* for now, the chain search is a bit simplistic. We just use 1763ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * the 1st group with any empty bits. */ 17641187c968852e3c668f3b9376083851f81f6eee22Joel Becker while ((status = ac->ac_group_search(alloc_inode, group_bh, 17651187c968852e3c668f3b9376083851f81f6eee22Joel Becker bits_wanted, min_bits, 17667d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker ac->ac_max_block, 17677d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res)) == -ENOSPC) { 1768ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!bg->bg_next_group) 1769ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh break; 1770a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh 1771a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh brelse(prev_group_bh); 1772a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh prev_group_bh = NULL; 1773a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh 1774ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh next_group = le64_to_cpu(bg->bg_next_group); 1775ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh prev_group_bh = group_bh; 1776ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group_bh = NULL; 177768f64d471be38631d7196b938d9809802dd467faJoel Becker status = ocfs2_read_group_descriptor(alloc_inode, fe, 177868f64d471be38631d7196b938d9809802dd467faJoel Becker next_group, &group_bh); 1779ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1780ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1781ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1782ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1783ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg = (struct ocfs2_group_desc *) group_bh->b_data; 1784ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1785ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1786ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 1787ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1788ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1789ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1790ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 17912f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_search_chain_succ( 17922f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma (unsigned long long)le64_to_cpu(bg->bg_blkno), res->sr_bits); 1793ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 17947d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bg_blkno = le64_to_cpu(bg->bg_blkno); 1795ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 17967d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker BUG_ON(res->sr_bits == 0); 179713e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker if (!status) 1798ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker ocfs2_bg_discontig_fix_result(ac, bg, res); 179913e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 1800e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh /* 1801e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * sr_bg_blkno might have been changed by 1802e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * ocfs2_bg_discontig_fix_result 1803e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh */ 1804e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh res->sr_bg_stable_blkno = group_bh->b_blocknr; 1805ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1806ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* 1807ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * Keep track of previous block descriptor read. When 1808ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * we find a target, if we have read more than X 1809ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * number of descriptors, and the target is reasonably 1810ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * empty, relink him to top of his chain. 1811ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 1812ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * We've read 0 extra blocks and only send one more to 1813ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * the transaction, yet the next guy to search has a 1814ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * much easier time. 1815ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 1816ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * Do this *after* figuring out how many bits we're taking out 1817ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * of our target group. 1818ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh */ 1819309a85b6861fedbb48a22d45e0e079d1be993b3aXiaowei.Hu if (!ac->ac_disable_chain_relink && 1820ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (prev_group_bh) && 18217d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker (ocfs2_block_group_reasonably_empty(bg, res->sr_bits))) { 1822ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = ocfs2_relink_block_group(handle, alloc_inode, 1823ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_bh, group_bh, 1824ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh prev_group_bh, chain); 1825ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1826ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1827ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1828ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1829ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1830ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1831e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (ac->ac_find_loc_only) 1832e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh goto out_loc_only; 1833e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 1834d51349829c378c06ba4aa7d4b16ca23739858608Mark Fasheh status = ocfs2_alloc_dinode_update_counts(alloc_inode, handle, 1835d51349829c378c06ba4aa7d4b16ca23739858608Mark Fasheh ac->ac_bh, res->sr_bits, 1836d51349829c378c06ba4aa7d4b16ca23739858608Mark Fasheh chain); 1837d51349829c378c06ba4aa7d4b16ca23739858608Mark Fasheh if (status) { 1838ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1839ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1840ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1841ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1842ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = ocfs2_block_group_set_bits(handle, 1843ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh alloc_inode, 1844ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg, 1845ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group_bh, 18467d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bit_offset, 18477d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bits); 1848ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1849ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1850ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1851ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1852ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 18532f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_search_chain_end( 18542f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma (unsigned long long)le64_to_cpu(fe->i_blkno), 18552f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma res->sr_bits); 1856ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1857e49e27674d1dd2717ad90b21ece8f83102153315Mark Fashehout_loc_only: 1858883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh *bits_left = le16_to_cpu(bg->bg_free_bits_count); 1859ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 1860a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh brelse(group_bh); 1861a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh brelse(prev_group_bh); 1862ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1863c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma if (status) 1864c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma mlog_errno(status); 1865ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1866ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1867ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1868ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* will give out up to bits_wanted contiguous bits. */ 1869aa8f8e93c898a0319bcd6c79a9a42fe52abac7d7Joel Beckerstatic int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *ac, 18701fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fasheh handle_t *handle, 1871ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, 1872ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 min_bits, 18737d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res) 1874ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1875ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1876ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 victim, i; 1877883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u16 bits_left = 0; 1878b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh u64 hint = ac->ac_last_group; 1879ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_chain_list *cl; 1880ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe; 1881ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1882ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_bits_given >= ac->ac_bits_wanted); 1883ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(bits_wanted > (ac->ac_bits_wanted - ac->ac_bits_given)); 1884ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ac->ac_bh); 1885ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1886ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe = (struct ocfs2_dinode *) ac->ac_bh->b_data; 188710995aa2451afa20b721cc7de856cae1a13dba57Joel Becker 188810995aa2451afa20b721cc7de856cae1a13dba57Joel Becker /* The bh was validated by the inode read during 188910995aa2451afa20b721cc7de856cae1a13dba57Joel Becker * ocfs2_reserve_suballoc_bits(). Any corruption is a code bug. */ 189010995aa2451afa20b721cc7de856cae1a13dba57Joel Becker BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); 189110995aa2451afa20b721cc7de856cae1a13dba57Joel Becker 1892ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (le32_to_cpu(fe->id1.bitmap1.i_used) >= 1893ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->id1.bitmap1.i_total)) { 1894aa8f8e93c898a0319bcd6c79a9a42fe52abac7d7Joel Becker ocfs2_error(ac->ac_inode->i_sb, 1895aa8f8e93c898a0319bcd6c79a9a42fe52abac7d7Joel Becker "Chain allocator dinode %llu has %u used " 1896b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh "bits but only %u total.", 1897b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)le64_to_cpu(fe->i_blkno), 1898ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->id1.bitmap1.i_used), 1899ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->id1.bitmap1.i_total)); 1900ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -EIO; 1901ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1902ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1903ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1904b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh res->sr_bg_blkno = hint; 19057d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker if (res->sr_bg_blkno) { 1906883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh /* Attempt to short-circuit the usual search mechanism 1907883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh * by jumping straight to the most recently used 1908b595076a180a56d1bb170e6eceda6eb9d76f4cd3Uwe Kleine-König * allocation group. This helps us maintain some 1909883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh * contiguousness across allocations. */ 1910da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh status = ocfs2_search_one_group(ac, handle, bits_wanted, 19117d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker min_bits, res, &bits_left); 19127d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker if (!status) 1913883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh goto set_hint; 1914883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (status < 0 && status != -ENOSPC) { 1915883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh mlog_errno(status); 1916883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh goto bail; 1917883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1918883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1919883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1920ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; 1921ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1922ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh victim = ocfs2_find_victim_chain(cl); 1923ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_chain = victim; 1924ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 19257d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker status = ocfs2_search_chain(ac, handle, bits_wanted, min_bits, 19267d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res, &bits_left); 1927b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh if (!status) { 1928b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh hint = ocfs2_group_from_res(res); 1929883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh goto set_hint; 1930b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh } 1931ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0 && status != -ENOSPC) { 1932ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1933ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1934ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1935ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 19362f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_claim_suballoc_bits(victim); 1937ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1938ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* If we didn't pick a good victim, then just default to 1939ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * searching each chain in order. Don't allow chain relinking 1940ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * because we only calculate enough journal credits for one 1941ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * relink per alloc. */ 1942309a85b6861fedbb48a22d45e0e079d1be993b3aXiaowei.Hu ac->ac_disable_chain_relink = 1; 1943ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i ++) { 1944ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (i == victim) 1945ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh continue; 1946ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!cl->cl_recs[i].c_free) 1947ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh continue; 1948ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1949ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_chain = i; 1950da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh status = ocfs2_search_chain(ac, handle, bits_wanted, min_bits, 19517d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res, &bits_left); 1952b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh if (!status) { 1953b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh hint = ocfs2_group_from_res(res); 1954ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh break; 1955b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh } 1956ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0 && status != -ENOSPC) { 1957ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1958ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1959ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1960ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1961ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1962883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fashehset_hint: 1963883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (status != -ENOSPC) { 1964883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh /* If the next search of this group is not likely to 1965883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh * yield a suitable extent, then we reset the last 1966883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh * group hint so as to not waste a disk read */ 1967883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (bits_left < min_bits) 1968883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh ac->ac_last_group = 0; 1969883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh else 1970b2b6ebf5f740e015b2155343958f067e594323eaMark Fasheh ac->ac_last_group = hint; 1971883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1972883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1973883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fashehbail: 1974c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma if (status) 1975c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma mlog_errno(status); 1976ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1977ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1978ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 19791ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Beckerint ocfs2_claim_metadata(handle_t *handle, 1980ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_alloc_context *ac, 1981ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, 19822b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker u64 *suballoc_loc, 1983ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 *suballoc_bit_start, 1984ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh unsigned int *num_bits, 1985ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 *blkno_start) 1986ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1987ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1988ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker struct ocfs2_suballoc_result res = { .sr_blkno = 0, }; 1989ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1990ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ac); 1991ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_bits_wanted < (ac->ac_bits_given + bits_wanted)); 1992ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_which != OCFS2_AC_USE_META); 1993ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1994aa8f8e93c898a0319bcd6c79a9a42fe52abac7d7Joel Becker status = ocfs2_claim_suballoc_bits(ac, 1995da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh handle, 1996ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bits_wanted, 1997ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1, 19987d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker &res); 1999ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 2000ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 2001ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 2002ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 20031ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Becker atomic_inc(&OCFS2_SB(ac->ac_inode->i_sb)->alloc_stats.bg_allocs); 2004ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 20052b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker *suballoc_loc = res.sr_bg_blkno; 20067d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker *suballoc_bit_start = res.sr_bit_offset; 2007ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker *blkno_start = res.sr_blkno; 20087d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker ac->ac_bits_given += res.sr_bits; 20097d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker *num_bits = res.sr_bits; 2010ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = 0; 2011ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 2012c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma if (status) 2013c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma mlog_errno(status); 2014ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 2015ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2016ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2017138211515c102807a16c02fdc15feef1f6ef8124Tao Mastatic void ocfs2_init_inode_ac_group(struct inode *dir, 2018abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma struct buffer_head *parent_di_bh, 2019138211515c102807a16c02fdc15feef1f6ef8124Tao Ma struct ocfs2_alloc_context *ac) 2020138211515c102807a16c02fdc15feef1f6ef8124Tao Ma{ 2021abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma struct ocfs2_dinode *di = (struct ocfs2_dinode *)parent_di_bh->b_data; 2022138211515c102807a16c02fdc15feef1f6ef8124Tao Ma /* 2023138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * Try to allocate inodes from some specific group. 2024138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * 2025138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * If the parent dir has recorded the last group used in allocation, 2026138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * cool, use it. Otherwise if we try to allocate new inode from the 2027138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * same slot the parent dir belongs to, use the same chunk. 2028138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * 2029138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * We are very careful here to avoid the mistake of setting 2030138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * ac_last_group to a group descriptor from a different (unlocked) slot. 2031138211515c102807a16c02fdc15feef1f6ef8124Tao Ma */ 2032138211515c102807a16c02fdc15feef1f6ef8124Tao Ma if (OCFS2_I(dir)->ip_last_used_group && 2033138211515c102807a16c02fdc15feef1f6ef8124Tao Ma OCFS2_I(dir)->ip_last_used_slot == ac->ac_alloc_slot) 2034138211515c102807a16c02fdc15feef1f6ef8124Tao Ma ac->ac_last_group = OCFS2_I(dir)->ip_last_used_group; 2035abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma else if (le16_to_cpu(di->i_suballoc_slot) == ac->ac_alloc_slot) { 2036abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma if (di->i_suballoc_loc) 2037abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma ac->ac_last_group = le64_to_cpu(di->i_suballoc_loc); 2038abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma else 2039abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma ac->ac_last_group = ocfs2_which_suballoc_group( 2040abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma le64_to_cpu(di->i_blkno), 2041abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma le16_to_cpu(di->i_suballoc_bit)); 2042abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma } 2043138211515c102807a16c02fdc15feef1f6ef8124Tao Ma} 2044138211515c102807a16c02fdc15feef1f6ef8124Tao Ma 2045138211515c102807a16c02fdc15feef1f6ef8124Tao Mastatic inline void ocfs2_save_inode_ac_group(struct inode *dir, 2046138211515c102807a16c02fdc15feef1f6ef8124Tao Ma struct ocfs2_alloc_context *ac) 2047138211515c102807a16c02fdc15feef1f6ef8124Tao Ma{ 2048138211515c102807a16c02fdc15feef1f6ef8124Tao Ma OCFS2_I(dir)->ip_last_used_group = ac->ac_last_group; 2049138211515c102807a16c02fdc15feef1f6ef8124Tao Ma OCFS2_I(dir)->ip_last_used_slot = ac->ac_alloc_slot; 2050138211515c102807a16c02fdc15feef1f6ef8124Tao Ma} 2051138211515c102807a16c02fdc15feef1f6ef8124Tao Ma 2052e49e27674d1dd2717ad90b21ece8f83102153315Mark Fashehint ocfs2_find_new_inode_loc(struct inode *dir, 2053e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh struct buffer_head *parent_fe_bh, 2054e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh struct ocfs2_alloc_context *ac, 2055e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh u64 *fe_blkno) 2056e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh{ 2057e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh int ret; 2058e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh handle_t *handle = NULL; 2059e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh struct ocfs2_suballoc_result *res; 2060e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2061e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh BUG_ON(!ac); 2062e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh BUG_ON(ac->ac_bits_given != 0); 2063e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh BUG_ON(ac->ac_bits_wanted != 1); 2064e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh BUG_ON(ac->ac_which != OCFS2_AC_USE_INODE); 2065e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2066e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh res = kzalloc(sizeof(*res), GFP_NOFS); 2067e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (res == NULL) { 2068e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ret = -ENOMEM; 2069e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh mlog_errno(ret); 2070e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh goto out; 2071e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh } 2072e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2073e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ocfs2_init_inode_ac_group(dir, parent_fe_bh, ac); 2074e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2075e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh /* 2076e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * The handle started here is for chain relink. Alternatively, 2077e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * we could just disable relink for these calls. 2078e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh */ 2079e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh handle = ocfs2_start_trans(OCFS2_SB(dir->i_sb), OCFS2_SUBALLOC_ALLOC); 2080e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (IS_ERR(handle)) { 2081e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ret = PTR_ERR(handle); 2082e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh handle = NULL; 2083e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh mlog_errno(ret); 2084e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh goto out; 2085e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh } 2086e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2087e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh /* 2088e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * This will instruct ocfs2_claim_suballoc_bits and 2089e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * ocfs2_search_one_group to search but save actual allocation 2090e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * for later. 2091e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh */ 2092e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ac->ac_find_loc_only = 1; 2093e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2094e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ret = ocfs2_claim_suballoc_bits(ac, handle, 1, 1, res); 2095e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (ret < 0) { 2096e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh mlog_errno(ret); 2097e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh goto out; 2098e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh } 2099e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2100e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ac->ac_find_loc_priv = res; 2101e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh *fe_blkno = res->sr_blkno; 2102e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2103e49e27674d1dd2717ad90b21ece8f83102153315Mark Fashehout: 2104e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (handle) 2105e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ocfs2_commit_trans(OCFS2_SB(dir->i_sb), handle); 2106e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2107e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (ret) 2108e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh kfree(res); 2109e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2110e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh return ret; 2111e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh} 2112e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2113e49e27674d1dd2717ad90b21ece8f83102153315Mark Fashehint ocfs2_claim_new_inode_at_loc(handle_t *handle, 2114e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh struct inode *dir, 2115e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh struct ocfs2_alloc_context *ac, 2116e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh u64 *suballoc_loc, 2117e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh u16 *suballoc_bit, 2118e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh u64 di_blkno) 2119e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh{ 2120e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh int ret; 2121e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh u16 chain; 2122e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh struct ocfs2_suballoc_result *res = ac->ac_find_loc_priv; 2123e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh struct buffer_head *bg_bh = NULL; 2124e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh struct ocfs2_group_desc *bg; 2125e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh struct ocfs2_dinode *di = (struct ocfs2_dinode *) ac->ac_bh->b_data; 2126e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2127e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh /* 2128e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * Since di_blkno is being passed back in, we check for any 2129e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * inconsistencies which may have happened between 2130e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * calls. These are code bugs as di_blkno is not expected to 2131e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh * change once returned from ocfs2_find_new_inode_loc() 2132e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh */ 2133e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh BUG_ON(res->sr_blkno != di_blkno); 2134e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2135e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ret = ocfs2_read_group_descriptor(ac->ac_inode, di, 2136e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh res->sr_bg_stable_blkno, &bg_bh); 2137e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (ret) { 2138e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh mlog_errno(ret); 2139e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh goto out; 2140e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh } 2141e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2142e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh bg = (struct ocfs2_group_desc *) bg_bh->b_data; 2143e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh chain = le16_to_cpu(bg->bg_chain); 2144e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2145e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ret = ocfs2_alloc_dinode_update_counts(ac->ac_inode, handle, 2146e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ac->ac_bh, res->sr_bits, 2147e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh chain); 2148e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (ret) { 2149e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh mlog_errno(ret); 2150e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh goto out; 2151e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh } 2152e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2153e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ret = ocfs2_block_group_set_bits(handle, 2154e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ac->ac_inode, 2155e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh bg, 2156e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh bg_bh, 2157e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh res->sr_bit_offset, 2158e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh res->sr_bits); 2159e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh if (ret < 0) { 2160e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh mlog_errno(ret); 2161e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh goto out; 2162e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh } 2163e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 21642f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_claim_new_inode_at_loc((unsigned long long)di_blkno, 21652f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma res->sr_bits); 2166e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2167e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh atomic_inc(&OCFS2_SB(ac->ac_inode->i_sb)->alloc_stats.bg_allocs); 2168e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2169e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh BUG_ON(res->sr_bits != 1); 2170e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2171e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh *suballoc_loc = res->sr_bg_blkno; 2172e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh *suballoc_bit = res->sr_bit_offset; 2173e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ac->ac_bits_given++; 2174e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh ocfs2_save_inode_ac_group(dir, ac); 2175e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2176e49e27674d1dd2717ad90b21ece8f83102153315Mark Fashehout: 2177e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh brelse(bg_bh); 2178e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 2179e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh return ret; 2180e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh} 2181e49e27674d1dd2717ad90b21ece8f83102153315Mark Fasheh 21821ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Beckerint ocfs2_claim_new_inode(handle_t *handle, 2183138211515c102807a16c02fdc15feef1f6ef8124Tao Ma struct inode *dir, 2184138211515c102807a16c02fdc15feef1f6ef8124Tao Ma struct buffer_head *parent_fe_bh, 2185ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_alloc_context *ac, 21862b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker u64 *suballoc_loc, 2187ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 *suballoc_bit, 2188ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 *fe_blkno) 2189ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2190ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 21912b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker struct ocfs2_suballoc_result res; 2192ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2193ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ac); 2194ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_bits_given != 0); 2195ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_bits_wanted != 1); 2196ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_which != OCFS2_AC_USE_INODE); 2197ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2198138211515c102807a16c02fdc15feef1f6ef8124Tao Ma ocfs2_init_inode_ac_group(dir, parent_fe_bh, ac); 2199138211515c102807a16c02fdc15feef1f6ef8124Tao Ma 2200aa8f8e93c898a0319bcd6c79a9a42fe52abac7d7Joel Becker status = ocfs2_claim_suballoc_bits(ac, 2201da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh handle, 2202ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1, 2203ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1, 22047d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker &res); 2205ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 2206ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 2207ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 2208ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 22091ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Becker atomic_inc(&OCFS2_SB(ac->ac_inode->i_sb)->alloc_stats.bg_allocs); 2210ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 22117d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker BUG_ON(res.sr_bits != 1); 2212ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 22132b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker *suballoc_loc = res.sr_bg_blkno; 22147d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker *suballoc_bit = res.sr_bit_offset; 2215ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker *fe_blkno = res.sr_blkno; 2216ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_bits_given++; 2217138211515c102807a16c02fdc15feef1f6ef8124Tao Ma ocfs2_save_inode_ac_group(dir, ac); 2218ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = 0; 2219ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 2220c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma if (status) 2221c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma mlog_errno(status); 2222ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 2223ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2224ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2225ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* translate a group desc. blkno and it's bitmap offset into 2226ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * disk cluster offset. */ 2227ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline u32 ocfs2_desc_bitmap_to_cluster_off(struct inode *inode, 2228ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 bg_blkno, 2229ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 bg_bit_off) 2230ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2231ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 2232ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 cluster = 0; 2233ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2234ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ocfs2_is_cluster_bitmap(inode)); 2235ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2236ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (bg_blkno != osb->first_cluster_group_blkno) 2237ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh cluster = ocfs2_blocks_to_clusters(inode->i_sb, bg_blkno); 2238ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh cluster += (u32) bg_bit_off; 2239ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return cluster; 2240ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2241ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2242ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* given a cluster offset, calculate which block group it belongs to 2243ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * and return that block offset. */ 2244d659072f736837e56b6433d58e5315ad1d4d5ccfTao Mau64 ocfs2_which_cluster_group(struct inode *inode, u32 cluster) 2245ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2246ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 2247ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 group_no; 2248ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2249ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ocfs2_is_cluster_bitmap(inode)); 2250ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2251ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group_no = cluster / osb->bitmap_cpg; 2252ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!group_no) 2253ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return osb->first_cluster_group_blkno; 2254ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return ocfs2_clusters_to_blocks(inode->i_sb, 2255ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group_no * osb->bitmap_cpg); 2256ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2257ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2258ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* given the block number of a cluster start, calculate which cluster 2259ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * group and descriptor bitmap offset that corresponds to. */ 2260ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline void ocfs2_block_to_cluster_group(struct inode *inode, 2261ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 data_blkno, 2262ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 *bg_blkno, 2263ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 *bg_bit_off) 2264ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2265ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 2266ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 data_cluster = ocfs2_blocks_to_clusters(osb->sb, data_blkno); 2267ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2268ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ocfs2_is_cluster_bitmap(inode)); 2269ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2270ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *bg_blkno = ocfs2_which_cluster_group(inode, 2271ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh data_cluster); 2272ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2273ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (*bg_blkno == osb->first_cluster_group_blkno) 2274ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *bg_bit_off = (u16) data_cluster; 2275ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh else 2276ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *bg_bit_off = (u16) ocfs2_blocks_to_clusters(osb->sb, 2277ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh data_blkno - *bg_blkno); 2278ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2279ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2280ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* 2281ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * min_bits - minimum contiguous chunk from this total allocation we 2282ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * can handle. set to what we asked for originally for a full 2283ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * contig. allocation, set to '1' to indicate we can deal with extents 2284ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * of any size. 2285ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh */ 22861ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Beckerint __ocfs2_claim_clusters(handle_t *handle, 2287415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh struct ocfs2_alloc_context *ac, 2288415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 min_clusters, 2289415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 max_clusters, 2290415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 *cluster_start, 2291415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 *num_clusters) 2292ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2293ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 2294415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh unsigned int bits_wanted = max_clusters; 2295ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker struct ocfs2_suballoc_result res = { .sr_blkno = 0, }; 22961ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Becker struct ocfs2_super *osb = OCFS2_SB(ac->ac_inode->i_sb); 2297ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2298ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_bits_given >= ac->ac_bits_wanted); 2299ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2300ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_which != OCFS2_AC_USE_LOCAL 2301ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh && ac->ac_which != OCFS2_AC_USE_MAIN); 2302ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2303ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (ac->ac_which == OCFS2_AC_USE_LOCAL) { 230433d5d380d667ad264675cfdb297dfc3c5b6542ccMark Fasheh WARN_ON(min_clusters > 1); 230533d5d380d667ad264675cfdb297dfc3c5b6542ccMark Fasheh 2306ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = ocfs2_claim_local_alloc_bits(osb, 2307ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh handle, 2308ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac, 2309ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bits_wanted, 2310ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh cluster_start, 2311ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh num_clusters); 2312ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!status) 2313ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh atomic_inc(&osb->alloc_stats.local_data); 2314ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } else { 2315ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (min_clusters > (osb->bitmap_cpg - 1)) { 2316ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* The only paths asking for contiguousness 2317ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * should know about this already. */ 23182fbe8d1ebe004425b4f7b8bba345623d2280be82Sunil Mushran mlog(ML_ERROR, "minimum allocation requested %u exceeds " 23192fbe8d1ebe004425b4f7b8bba345623d2280be82Sunil Mushran "group bitmap size %u!\n", min_clusters, 23202fbe8d1ebe004425b4f7b8bba345623d2280be82Sunil Mushran osb->bitmap_cpg); 2321ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOSPC; 2322ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 2323ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2324ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* clamp the current request down to a realistic size. */ 2325ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (bits_wanted > (osb->bitmap_cpg - 1)) 2326ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bits_wanted = osb->bitmap_cpg - 1; 2327ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2328aa8f8e93c898a0319bcd6c79a9a42fe52abac7d7Joel Becker status = ocfs2_claim_suballoc_bits(ac, 2329da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh handle, 2330ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bits_wanted, 2331ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh min_clusters, 23327d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker &res); 2333ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!status) { 2334ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker BUG_ON(res.sr_blkno); /* cluster alloc can't set */ 2335ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *cluster_start = 2336ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_desc_bitmap_to_cluster_off(ac->ac_inode, 23377d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res.sr_bg_blkno, 23387d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res.sr_bit_offset); 2339ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh atomic_inc(&osb->alloc_stats.bitmap_data); 23404711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma *num_clusters = res.sr_bits; 2341ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2342ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2343ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 2344ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 2345ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 2346ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 2347ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2348ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 23494711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma ac->ac_bits_given += *num_clusters; 2350ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2351ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 2352c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma if (status) 2353c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma mlog_errno(status); 2354ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 2355ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2356ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 23571ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Beckerint ocfs2_claim_clusters(handle_t *handle, 2358415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh struct ocfs2_alloc_context *ac, 2359415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 min_clusters, 2360415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 *cluster_start, 2361415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 *num_clusters) 2362415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh{ 2363415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh unsigned int bits_wanted = ac->ac_bits_wanted - ac->ac_bits_given; 2364415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh 23651ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Becker return __ocfs2_claim_clusters(handle, ac, min_clusters, 2366415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh bits_wanted, cluster_start, num_clusters); 2367415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh} 2368415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh 2369b4414eea0e7b9c134262c801a87e338bf675962cMark Fashehstatic int ocfs2_block_group_clear_bits(handle_t *handle, 2370b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct inode *alloc_inode, 2371b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct ocfs2_group_desc *bg, 2372b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct buffer_head *group_bh, 2373b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int bit_off, 2374b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int num_bits, 2375b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh void (*undo_fn)(unsigned int bit, 2376b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned long *bmap)) 2377ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2378ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 2379ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh unsigned int tmp; 2380ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *undo_bg = NULL; 2381ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 23824203530613280281868b3ca36c817530bca3825cJoel Becker /* The caller got this descriptor from 23834203530613280281868b3ca36c817530bca3825cJoel Becker * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ 23844203530613280281868b3ca36c817530bca3825cJoel Becker BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); 2385ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 23862f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_block_group_clear_bits(bit_off, num_bits); 2387ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2388b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh BUG_ON(undo_fn && !ocfs2_is_cluster_bitmap(alloc_inode)); 23890cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), 2390b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh group_bh, 2391b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh undo_fn ? 2392b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh OCFS2_JOURNAL_ACCESS_UNDO : 2393b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh OCFS2_JOURNAL_ACCESS_WRITE); 2394ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 2395ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 2396ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 2397ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2398ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2399b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh if (undo_fn) { 240094e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran jbd_lock_bh_state(group_bh); 240194e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran undo_bg = (struct ocfs2_group_desc *) 240294e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran bh2jh(group_bh)->b_committed_data; 240394e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran BUG_ON(!undo_bg); 240494e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran } 2405ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2406ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh tmp = num_bits; 2407ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh while(tmp--) { 2408ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_clear_bit((bit_off + tmp), 2409ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (unsigned long *) bg->bg_bitmap); 2410b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh if (undo_fn) 2411b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh undo_fn(bit_off + tmp, 2412b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh (unsigned long *) undo_bg->bg_bitmap); 2413ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2414ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le16_add_cpu(&bg->bg_free_bits_count, num_bits); 24159b5cd10e4c14a1a642076ace6a73be3d33c91fb6Srinivas Eeda if (le16_to_cpu(bg->bg_free_bits_count) > le16_to_cpu(bg->bg_bits)) { 24169b5cd10e4c14a1a642076ace6a73be3d33c91fb6Srinivas Eeda ocfs2_error(alloc_inode->i_sb, "Group descriptor # %llu has bit" 24179b5cd10e4c14a1a642076ace6a73be3d33c91fb6Srinivas Eeda " count %u but claims %u are freed. num_bits %d", 24189b5cd10e4c14a1a642076ace6a73be3d33c91fb6Srinivas Eeda (unsigned long long)le64_to_cpu(bg->bg_blkno), 24199b5cd10e4c14a1a642076ace6a73be3d33c91fb6Srinivas Eeda le16_to_cpu(bg->bg_bits), 24209b5cd10e4c14a1a642076ace6a73be3d33c91fb6Srinivas Eeda le16_to_cpu(bg->bg_free_bits_count), num_bits); 24219b5cd10e4c14a1a642076ace6a73be3d33c91fb6Srinivas Eeda return -EROFS; 24229b5cd10e4c14a1a642076ace6a73be3d33c91fb6Srinivas Eeda } 2423ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2424b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh if (undo_fn) 242594e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran jbd_unlock_bh_state(group_bh); 242694e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran 2427ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, group_bh); 2428ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 2429ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 2430ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2431ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2432ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* 2433ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * expects the suballoc inode to already be locked. 2434ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh */ 2435b4414eea0e7b9c134262c801a87e338bf675962cMark Fashehstatic int _ocfs2_free_suballoc_bits(handle_t *handle, 2436b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct inode *alloc_inode, 2437b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct buffer_head *alloc_bh, 2438b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int start_bit, 2439b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh u64 bg_blkno, 2440b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int count, 2441b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh void (*undo_fn)(unsigned int bit, 2442b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned long *bitmap)) 2443ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2444ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status = 0; 2445ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 tmp_used; 2446ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe = (struct ocfs2_dinode *) alloc_bh->b_data; 2447ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_chain_list *cl = &fe->id2.i_chain; 2448ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh = NULL; 2449ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *group; 2450ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 245110995aa2451afa20b721cc7de856cae1a13dba57Joel Becker /* The alloc_bh comes from ocfs2_free_dinode() or 245210995aa2451afa20b721cc7de856cae1a13dba57Joel Becker * ocfs2_free_clusters(). The callers have all locked the 245310995aa2451afa20b721cc7de856cae1a13dba57Joel Becker * allocator and gotten alloc_bh from the lock call. This 245425985edcedea6396277003854657b5f3cb31a628Lucas De Marchi * validates the dinode buffer. Any corruption that has happened 245510995aa2451afa20b721cc7de856cae1a13dba57Joel Becker * is a code bug. */ 245610995aa2451afa20b721cc7de856cae1a13dba57Joel Becker BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); 2457ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON((count + start_bit) > ocfs2_bits_per_group(cl)); 2458ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 24592f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_free_suballoc_bits( 24602f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno, 24612f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma (unsigned long long)bg_blkno, 24622f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma start_bit, count); 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 2498c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma if (status) 2499c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma mlog_errno(status); 2500ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 2501ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2502ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2503b4414eea0e7b9c134262c801a87e338bf675962cMark Fashehint ocfs2_free_suballoc_bits(handle_t *handle, 2504b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct inode *alloc_inode, 2505b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct buffer_head *alloc_bh, 2506b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int start_bit, 2507b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh u64 bg_blkno, 2508b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int count) 2509b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh{ 2510b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh return _ocfs2_free_suballoc_bits(handle, alloc_inode, alloc_bh, 2511b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh start_bit, bg_blkno, count, NULL); 2512b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh} 2513b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh 25141fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fashehint ocfs2_free_dinode(handle_t *handle, 2515ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *inode_alloc_inode, 2516ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *inode_alloc_bh, 2517ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *di) 2518ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2519ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 blk = le64_to_cpu(di->i_blkno); 2520ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 bit = le16_to_cpu(di->i_suballoc_bit); 2521ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 bg_blkno = ocfs2_which_suballoc_group(blk, bit); 2522ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 252374380c479ad83addeff8a172ab95f59557b5b0c3Tao Ma if (di->i_suballoc_loc) 252474380c479ad83addeff8a172ab95f59557b5b0c3Tao Ma bg_blkno = le64_to_cpu(di->i_suballoc_loc); 2525ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return ocfs2_free_suballoc_bits(handle, inode_alloc_inode, 2526ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh inode_alloc_bh, bit, bg_blkno, 1); 2527ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2528ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2529b4414eea0e7b9c134262c801a87e338bf675962cMark Fashehstatic int _ocfs2_free_clusters(handle_t *handle, 2530b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct inode *bitmap_inode, 2531b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct buffer_head *bitmap_bh, 2532b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh u64 start_blk, 2533b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int num_clusters, 2534b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh void (*undo_fn)(unsigned int bit, 2535b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned long *bitmap)) 2536ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2537ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 2538ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 bg_start_bit; 2539ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 bg_blkno; 2540ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe; 2541ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2542ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* You can't ever have a contiguous set of clusters 2543ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * bigger than a block group bitmap so we never have to worry 2544ef6b689b63b9f5227ccee6f16dd9ee3faf58a464Tao Ma * about looping on them. 2545ef6b689b63b9f5227ccee6f16dd9ee3faf58a464Tao Ma * This is expensive. We can safely remove once this stuff has 2546ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * gotten tested really well. */ 2547ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(start_blk != ocfs2_clusters_to_blocks(bitmap_inode->i_sb, ocfs2_blocks_to_clusters(bitmap_inode->i_sb, start_blk))); 2548ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2549ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe = (struct ocfs2_dinode *) bitmap_bh->b_data; 2550ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2551ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_block_to_cluster_group(bitmap_inode, start_blk, &bg_blkno, 2552ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh &bg_start_bit); 2553ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 25542f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_free_clusters((unsigned long long)bg_blkno, 25552f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma (unsigned long long)start_blk, 25562f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma bg_start_bit, num_clusters); 2557ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2558b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh status = _ocfs2_free_suballoc_bits(handle, bitmap_inode, bitmap_bh, 2559b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh bg_start_bit, bg_blkno, 2560b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh num_clusters, undo_fn); 25619c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh if (status < 0) { 2562ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 25639c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh goto out; 25649c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh } 25659c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh 25669c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh ocfs2_local_alloc_seen_free_bits(OCFS2_SB(bitmap_inode->i_sb), 25679c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh num_clusters); 2568ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 25699c7af40b210e87f8fddd97b0badc0a352862234aMark Fashehout: 2570c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma if (status) 2571c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma mlog_errno(status); 2572ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 2573ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2574ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2575b4414eea0e7b9c134262c801a87e338bf675962cMark Fashehint ocfs2_free_clusters(handle_t *handle, 2576b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct inode *bitmap_inode, 2577b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct buffer_head *bitmap_bh, 2578b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh u64 start_blk, 2579b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int num_clusters) 2580b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh{ 2581b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh return _ocfs2_free_clusters(handle, bitmap_inode, bitmap_bh, 2582b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh start_blk, num_clusters, 2583b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh _ocfs2_set_bit); 2584b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh} 2585b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh 2586b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh/* 2587b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh * Give never-used clusters back to the global bitmap. We don't need 2588b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh * to protect these bits in the undo buffer. 2589b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh */ 2590b4414eea0e7b9c134262c801a87e338bf675962cMark Fashehint ocfs2_release_clusters(handle_t *handle, 2591b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct inode *bitmap_inode, 2592b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct buffer_head *bitmap_bh, 2593b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh u64 start_blk, 2594b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int num_clusters) 2595b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh{ 2596b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh return _ocfs2_free_clusters(handle, bitmap_inode, bitmap_bh, 2597b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh start_blk, num_clusters, 2598b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh _ocfs2_clear_bit); 2599b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh} 2600b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh 2601ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline void ocfs2_debug_bg(struct ocfs2_group_desc *bg) 2602ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2603ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("Block Group:\n"); 2604ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("bg_signature: %s\n", bg->bg_signature); 2605ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("bg_size: %u\n", bg->bg_size); 2606ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("bg_bits: %u\n", bg->bg_bits); 2607ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("bg_free_bits_count: %u\n", bg->bg_free_bits_count); 2608ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("bg_chain: %u\n", bg->bg_chain); 2609ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("bg_generation: %u\n", le32_to_cpu(bg->bg_generation)); 2610b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh printk("bg_next_group: %llu\n", 2611b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)bg->bg_next_group); 2612b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh printk("bg_parent_dinode: %llu\n", 2613b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)bg->bg_parent_dinode); 2614b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh printk("bg_blkno: %llu\n", 2615b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)bg->bg_blkno); 2616ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2617ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2618ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline void ocfs2_debug_suballoc_inode(struct ocfs2_dinode *fe) 2619ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2620ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int i; 2621ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2622b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh printk("Suballoc Inode %llu:\n", (unsigned long long)fe->i_blkno); 2623ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("i_signature: %s\n", fe->i_signature); 2624b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh printk("i_size: %llu\n", 2625b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)fe->i_size); 2626ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("i_clusters: %u\n", fe->i_clusters); 2627ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("i_generation: %u\n", 2628ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->i_generation)); 2629ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("id1.bitmap1.i_used: %u\n", 2630ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->id1.bitmap1.i_used)); 2631ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("id1.bitmap1.i_total: %u\n", 2632ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->id1.bitmap1.i_total)); 2633ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("id2.i_chain.cl_cpg: %u\n", fe->id2.i_chain.cl_cpg); 2634ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("id2.i_chain.cl_bpc: %u\n", fe->id2.i_chain.cl_bpc); 2635ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("id2.i_chain.cl_count: %u\n", fe->id2.i_chain.cl_count); 2636ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("id2.i_chain.cl_next_free_rec: %u\n", 2637ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe->id2.i_chain.cl_next_free_rec); 2638ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh for(i = 0; i < fe->id2.i_chain.cl_next_free_rec; i++) { 2639ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("fe->id2.i_chain.cl_recs[%d].c_free: %u\n", i, 2640ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe->id2.i_chain.cl_recs[i].c_free); 2641ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("fe->id2.i_chain.cl_recs[%d].c_total: %u\n", i, 2642ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe->id2.i_chain.cl_recs[i].c_total); 2643b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh printk("fe->id2.i_chain.cl_recs[%d].c_blkno: %llu\n", i, 2644b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)fe->id2.i_chain.cl_recs[i].c_blkno); 2645ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2646ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2647e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2648e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma/* 2649e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * For a given allocation, determine which allocators will need to be 2650e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * accessed, and lock them, reserving the appropriate number of bits. 2651e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * 2652e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * Sparse file systems call this from ocfs2_write_begin_nolock() 2653e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * and ocfs2_allocate_unwritten_extents(). 2654e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * 2655e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * File systems which don't support holes call this from 2656e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * ocfs2_extend_allocation(). 2657e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma */ 2658f99b9b7ccf6a691f653cec45f36bfdd1e94769c7Joel Beckerint ocfs2_lock_allocators(struct inode *inode, 2659f99b9b7ccf6a691f653cec45f36bfdd1e94769c7Joel Becker struct ocfs2_extent_tree *et, 2660e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma u32 clusters_to_add, u32 extents_to_split, 2661e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma struct ocfs2_alloc_context **data_ac, 2662f99b9b7ccf6a691f653cec45f36bfdd1e94769c7Joel Becker struct ocfs2_alloc_context **meta_ac) 2663e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma{ 2664e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma int ret = 0, num_free_extents; 2665e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma unsigned int max_recs_needed = clusters_to_add + 2 * extents_to_split; 2666e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 2667e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2668e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma *meta_ac = NULL; 2669e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (data_ac) 2670e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma *data_ac = NULL; 2671e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2672e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma BUG_ON(clusters_to_add != 0 && data_ac == NULL); 2673e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 26743d03a305ded8057155bd3c801e64ffef9f534827Joel Becker num_free_extents = ocfs2_num_free_extents(osb, et); 2675e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (num_free_extents < 0) { 2676e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma ret = num_free_extents; 2677e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma mlog_errno(ret); 2678e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma goto out; 2679e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma } 2680e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2681e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma /* 2682e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * Sparse allocation file systems need to be more conservative 2683e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * with reserving room for expansion - the actual allocation 2684e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * happens while we've got a journal handle open so re-taking 2685e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * a cluster lock (because we ran out of room for another 2686e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * extent) will violate ordering rules. 2687e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * 2688e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * Most of the time we'll only be seeing this 1 cluster at a time 2689e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * anyway. 2690e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * 2691e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * Always lock for any unwritten extents - we might want to 2692e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * add blocks during a split. 2693e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma */ 2694e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (!num_free_extents || 2695e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma (ocfs2_sparse_alloc(osb) && num_free_extents < max_recs_needed)) { 2696f99b9b7ccf6a691f653cec45f36bfdd1e94769c7Joel Becker ret = ocfs2_reserve_new_metadata(osb, et->et_root_el, meta_ac); 2697e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (ret < 0) { 2698e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (ret != -ENOSPC) 2699e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma mlog_errno(ret); 2700e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma goto out; 2701e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma } 2702e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma } 2703e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2704e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (clusters_to_add == 0) 2705e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma goto out; 2706e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2707e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma ret = ocfs2_reserve_clusters(osb, clusters_to_add, data_ac); 2708e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (ret < 0) { 2709e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (ret != -ENOSPC) 2710e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma mlog_errno(ret); 2711e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma goto out; 2712e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma } 2713e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2714e7d4cb6bc19658646357eeff134645cd9bc3479fTao Maout: 2715e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (ret) { 2716e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (*meta_ac) { 2717e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma ocfs2_free_alloc_context(*meta_ac); 2718e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma *meta_ac = NULL; 2719e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma } 2720e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2721e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma /* 2722e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * We cannot have an error and a non null *data_ac. 2723e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma */ 2724e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma } 2725e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2726e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma return ret; 2727e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma} 27286ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 27296ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang/* 27306ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * Read the inode specified by blkno to get suballoc_slot and 27316ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * suballoc_bit. 27326ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang */ 27336ca497a83e592d64e050c4d04b6dedb8c915f39awengang wangstatic int ocfs2_get_suballoc_slot_bit(struct ocfs2_super *osb, u64 blkno, 2734889f004a8c83d515f275078687f859bc0d5ede9dTao Ma u16 *suballoc_slot, u64 *group_blkno, 2735889f004a8c83d515f275078687f859bc0d5ede9dTao Ma u16 *suballoc_bit) 27366ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang{ 27376ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang int status; 27386ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct buffer_head *inode_bh = NULL; 27396ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct ocfs2_dinode *inode_fe; 27406ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 27412f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_get_suballoc_slot_bit((unsigned long long)blkno); 27426ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 27436ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang /* dirty read disk */ 27446ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = ocfs2_read_blocks_sync(osb, blkno, 1, &inode_bh); 27456ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (status < 0) { 27465b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker mlog(ML_ERROR, "read block %llu failed %d\n", 27475b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker (unsigned long long)blkno, status); 27486ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 27496ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 27506ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 27516ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang inode_fe = (struct ocfs2_dinode *) inode_bh->b_data; 27526ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (!OCFS2_IS_VALID_DINODE(inode_fe)) { 27535b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker mlog(ML_ERROR, "invalid inode %llu requested\n", 27545b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker (unsigned long long)blkno); 27556ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = -EINVAL; 27566ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 27576ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 27586ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 27590fba813748f16f4eaf24d492c505226c4026d58fTao Ma if (le16_to_cpu(inode_fe->i_suballoc_slot) != (u16)OCFS2_INVALID_SLOT && 27606ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang (u32)le16_to_cpu(inode_fe->i_suballoc_slot) > osb->max_slots - 1) { 27616ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mlog(ML_ERROR, "inode %llu has invalid suballoc slot %u\n", 27625b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker (unsigned long long)blkno, 27635b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker (u32)le16_to_cpu(inode_fe->i_suballoc_slot)); 27646ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = -EINVAL; 27656ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 27666ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 27676ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 27686ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (suballoc_slot) 27696ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang *suballoc_slot = le16_to_cpu(inode_fe->i_suballoc_slot); 27706ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (suballoc_bit) 27716ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang *suballoc_bit = le16_to_cpu(inode_fe->i_suballoc_bit); 2772889f004a8c83d515f275078687f859bc0d5ede9dTao Ma if (group_blkno) 2773889f004a8c83d515f275078687f859bc0d5ede9dTao Ma *group_blkno = le64_to_cpu(inode_fe->i_suballoc_loc); 27746ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 27756ca497a83e592d64e050c4d04b6dedb8c915f39awengang wangbail: 27766ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang brelse(inode_bh); 27776ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 2778c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma if (status) 2779c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma mlog_errno(status); 27806ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang return status; 27816ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang} 27826ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 27836ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang/* 27846ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * test whether bit is SET in allocator bitmap or not. on success, 0 27856ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * is returned and *res is 1 for SET; 0 otherwise. when fails, errno 27866ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * is returned and *res is meaningless. Call this after you have 27876ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * cluster locked against suballoc, or you may get a result based on 27886ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * non-up2date contents 27896ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang */ 27906ca497a83e592d64e050c4d04b6dedb8c915f39awengang wangstatic int ocfs2_test_suballoc_bit(struct ocfs2_super *osb, 27916ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct inode *suballoc, 2792889f004a8c83d515f275078687f859bc0d5ede9dTao Ma struct buffer_head *alloc_bh, 2793889f004a8c83d515f275078687f859bc0d5ede9dTao Ma u64 group_blkno, u64 blkno, 27946ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang u16 bit, int *res) 27956ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang{ 2796abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma struct ocfs2_dinode *alloc_di; 27976ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct ocfs2_group_desc *group; 27986ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct buffer_head *group_bh = NULL; 27996ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang u64 bg_blkno; 28006ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang int status; 28016ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 28022f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_test_suballoc_bit((unsigned long long)blkno, 28032f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma (unsigned int)bit); 28046ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 2805abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma alloc_di = (struct ocfs2_dinode *)alloc_bh->b_data; 2806abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma if ((bit + 1) > ocfs2_bits_per_group(&alloc_di->id2.i_chain)) { 28076ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mlog(ML_ERROR, "suballoc bit %u out of range of %u\n", 28086ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang (unsigned int)bit, 2809abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma ocfs2_bits_per_group(&alloc_di->id2.i_chain)); 28106ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = -EINVAL; 28116ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 28126ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 28136ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 2814889f004a8c83d515f275078687f859bc0d5ede9dTao Ma bg_blkno = group_blkno ? group_blkno : 2815889f004a8c83d515f275078687f859bc0d5ede9dTao Ma ocfs2_which_suballoc_group(blkno, bit); 2816abf1b3cb5b20fbad27ca9c7497235eeb4dd3f4fdTao Ma status = ocfs2_read_group_descriptor(suballoc, alloc_di, bg_blkno, 28176ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang &group_bh); 28186ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (status < 0) { 28195b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker mlog(ML_ERROR, "read group %llu failed %d\n", 28205b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker (unsigned long long)bg_blkno, status); 28216ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 28226ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 28236ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 28246ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang group = (struct ocfs2_group_desc *) group_bh->b_data; 28256ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang *res = ocfs2_test_bit(bit, (unsigned long *)group->bg_bitmap); 28266ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 28276ca497a83e592d64e050c4d04b6dedb8c915f39awengang wangbail: 28286ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang brelse(group_bh); 28296ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 2830c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma if (status) 2831c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma mlog_errno(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 28562f73e135b83c5001dad84cbd1d445d23fd045b83Tao Ma trace_ocfs2_test_inode_bit((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: 2897c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma if (status) 2898c1e8d35ef5ffb393b94a192034b5e3541e005d75Tao Ma mlog_errno(status); 28996ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang return status; 29006ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang} 2901