suballoc.c revision 8571882c21e5073b2f96147ec4ff9b7042339e1b
1ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* -*- mode: c; c-basic-offset: 8; -*- 2ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * vim: noexpandtab sw=8 ts=8 sts=0: 3ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 4ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * suballoc.c 5ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 6ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * metadata alloc and free 7ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * Inspired by ext3 block groups. 8ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 9ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * Copyright (C) 2002, 2004 Oracle. All rights reserved. 10ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 11ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * This program is free software; you can redistribute it and/or 12ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * modify it under the terms of the GNU General Public 13ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * License as published by the Free Software Foundation; either 14ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * version 2 of the License, or (at your option) any later version. 15ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 16ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * This program is distributed in the hope that it will be useful, 17ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * but WITHOUT ANY WARRANTY; without even the implied warranty of 18ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * General Public License for more details. 20ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 21ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * You should have received a copy of the GNU General Public 22ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * License along with this program; if not, write to the 23ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 24ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * Boston, MA 021110-1307, USA. 25ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh */ 26ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 27ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include <linux/fs.h> 28ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include <linux/types.h> 29ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include <linux/slab.h> 30ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include <linux/highmem.h> 31ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 32ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#define MLOG_MASK_PREFIX ML_DISK_ALLOC 33ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include <cluster/masklog.h> 34ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 35ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "ocfs2.h" 36ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 37ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "alloc.h" 38d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker#include "blockcheck.h" 39ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "dlmglue.h" 40ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "inode.h" 41ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "journal.h" 42ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "localalloc.h" 43ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "suballoc.h" 44ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "super.h" 45ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "sysfile.h" 46ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "uptodate.h" 47ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 48ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh#include "buffer_head_io.h" 49ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 50ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma#define NOT_ALLOC_NEW_GROUP 0 5160ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma#define ALLOC_NEW_GROUP 0x1 5260ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma#define ALLOC_GROUPS_FROM_GLOBAL 0x2 53ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma 54b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang#define OCFS2_MAX_TO_STEAL 1024 554d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma 567d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Beckerstruct ocfs2_suballoc_result { 572b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker u64 sr_bg_blkno; /* The bg we allocated from. Set 582b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker to 0 when a block group is 592b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker contiguous. */ 60ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker u64 sr_blkno; /* The first allocated block */ 617d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker unsigned int sr_bit_offset; /* The bit in the bg */ 627d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker unsigned int sr_bits; /* How many bits we claimed */ 637d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker}; 647d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker 65ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline void ocfs2_debug_bg(struct ocfs2_group_desc *bg); 66ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline void ocfs2_debug_suballoc_inode(struct ocfs2_dinode *fe); 67ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline u16 ocfs2_find_victim_chain(struct ocfs2_chain_list *cl); 681fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fashehstatic int ocfs2_block_group_fill(handle_t *handle, 69ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode, 70ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *bg_bh, 71ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 group_blkno, 72798db35f4649eac2778381c390ed7d12de9ec767Joel Becker unsigned int group_clusters, 73ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 my_chain, 74ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_chain_list *cl); 75ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_block_group_alloc(struct ocfs2_super *osb, 76ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode, 771187c968852e3c668f3b9376083851f81f6eee22Joel Becker struct buffer_head *bh, 7860ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma u64 max_block, 79feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma u64 *last_alloc_group, 8060ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma int flags); 81ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 82ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_cluster_group_search(struct inode *inode, 83ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh, 84ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, u32 min_bits, 851187c968852e3c668f3b9376083851f81f6eee22Joel Becker u64 max_block, 867d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res); 87ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_block_group_search(struct inode *inode, 88ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh, 89ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, u32 min_bits, 901187c968852e3c668f3b9376083851f81f6eee22Joel Becker u64 max_block, 917d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res); 92aa8f8e93c898a0319bcd6c79a9a42fe52abac7d7Joel Beckerstatic int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *ac, 931fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fasheh handle_t *handle, 94ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, 95ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 min_bits, 967d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res); 97ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_test_bg_bit_allocatable(struct buffer_head *bg_bh, 98ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int nr); 991fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fashehstatic inline int ocfs2_block_group_set_bits(handle_t *handle, 100ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode, 101ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg, 102ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh, 103ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh unsigned int bit_off, 104ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh unsigned int num_bits); 1051fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fashehstatic int ocfs2_relink_block_group(handle_t *handle, 106ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode, 107ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *fe_bh, 108ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *bg_bh, 109ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *prev_bg_bh, 110ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 chain); 111ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg, 112ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 wanted); 113ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline u32 ocfs2_desc_bitmap_to_cluster_off(struct inode *inode, 114ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 bg_blkno, 115ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 bg_bit_off); 116ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline void ocfs2_block_to_cluster_group(struct inode *inode, 117ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 data_blkno, 118ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 *bg_blkno, 119ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 *bg_bit_off); 1201187c968852e3c668f3b9376083851f81f6eee22Joel Beckerstatic int ocfs2_reserve_clusters_with_limit(struct ocfs2_super *osb, 1211187c968852e3c668f3b9376083851f81f6eee22Joel Becker u32 bits_wanted, u64 max_block, 12260ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma int flags, 1231187c968852e3c668f3b9376083851f81f6eee22Joel Becker struct ocfs2_alloc_context **ac); 124ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1259c7af40b210e87f8fddd97b0badc0a352862234aMark Fashehvoid ocfs2_free_ac_resource(struct ocfs2_alloc_context *ac) 126ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 127da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh struct inode *inode = ac->ac_inode; 128da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh 129da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh if (inode) { 130da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh if (ac->ac_which != OCFS2_AC_USE_LOCAL) 131e63aecb651ba73dffc62f9608ee1b7ae2a0ffd4bMark Fasheh ocfs2_inode_unlock(inode, 1); 132da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh 133da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh mutex_unlock(&inode->i_mutex); 134da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh 135da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh iput(inode); 1364d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma ac->ac_inode = NULL; 137da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh } 138a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh brelse(ac->ac_bh); 139a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh ac->ac_bh = NULL; 140e3b4a97dbe9741a3227c3ed857a0632532fcd386Mark Fasheh ac->ac_resv = NULL; 1414d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma} 1424d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma 1434d0ddb2ce25db2254d468233d942276ecf40bff8Tao Mavoid ocfs2_free_alloc_context(struct ocfs2_alloc_context *ac) 1444d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma{ 1454d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma ocfs2_free_ac_resource(ac); 146ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh kfree(ac); 147ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 148ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 149ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic u32 ocfs2_bits_per_group(struct ocfs2_chain_list *cl) 150ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 151ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return (u32)le16_to_cpu(cl->cl_cpg) * (u32)le16_to_cpu(cl->cl_bpc); 152ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 153ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 15457e3e7971136003c96766346049aa73b82cab079Joel Becker#define do_error(fmt, ...) \ 15557e3e7971136003c96766346049aa73b82cab079Joel Becker do{ \ 15678c37eb0d5e6a9727b12ea0f1821795ffaa66cfeTao Ma if (resize) \ 15757e3e7971136003c96766346049aa73b82cab079Joel Becker mlog(ML_ERROR, fmt "\n", ##__VA_ARGS__); \ 15857e3e7971136003c96766346049aa73b82cab079Joel Becker else \ 15957e3e7971136003c96766346049aa73b82cab079Joel Becker ocfs2_error(sb, fmt, ##__VA_ARGS__); \ 16057e3e7971136003c96766346049aa73b82cab079Joel Becker } while (0) 16157e3e7971136003c96766346049aa73b82cab079Joel Becker 162970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Beckerstatic int ocfs2_validate_gd_self(struct super_block *sb, 163970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker struct buffer_head *bh, 16478c37eb0d5e6a9727b12ea0f1821795ffaa66cfeTao Ma int resize) 165970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker{ 166970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; 167970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker 1687bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh if (!OCFS2_IS_VALID_GROUP_DESC(gd)) { 16968f64d471be38631d7196b938d9809802dd467faJoel Becker do_error("Group descriptor #%llu has bad signature %.*s", 17068f64d471be38631d7196b938d9809802dd467faJoel Becker (unsigned long long)bh->b_blocknr, 7, 17157e3e7971136003c96766346049aa73b82cab079Joel Becker gd->bg_signature); 17257e3e7971136003c96766346049aa73b82cab079Joel Becker return -EINVAL; 1737bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh } 1747bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh 17568f64d471be38631d7196b938d9809802dd467faJoel Becker if (le64_to_cpu(gd->bg_blkno) != bh->b_blocknr) { 17668f64d471be38631d7196b938d9809802dd467faJoel Becker do_error("Group descriptor #%llu has an invalid bg_blkno " 17768f64d471be38631d7196b938d9809802dd467faJoel Becker "of %llu", 17868f64d471be38631d7196b938d9809802dd467faJoel Becker (unsigned long long)bh->b_blocknr, 17968f64d471be38631d7196b938d9809802dd467faJoel Becker (unsigned long long)le64_to_cpu(gd->bg_blkno)); 18068f64d471be38631d7196b938d9809802dd467faJoel Becker return -EINVAL; 18168f64d471be38631d7196b938d9809802dd467faJoel Becker } 18268f64d471be38631d7196b938d9809802dd467faJoel Becker 18368f64d471be38631d7196b938d9809802dd467faJoel Becker if (le32_to_cpu(gd->bg_generation) != OCFS2_SB(sb)->fs_generation) { 18468f64d471be38631d7196b938d9809802dd467faJoel Becker do_error("Group descriptor #%llu has an invalid " 18568f64d471be38631d7196b938d9809802dd467faJoel Becker "fs_generation of #%u", 18668f64d471be38631d7196b938d9809802dd467faJoel Becker (unsigned long long)bh->b_blocknr, 18768f64d471be38631d7196b938d9809802dd467faJoel Becker le32_to_cpu(gd->bg_generation)); 18868f64d471be38631d7196b938d9809802dd467faJoel Becker return -EINVAL; 18968f64d471be38631d7196b938d9809802dd467faJoel Becker } 19068f64d471be38631d7196b938d9809802dd467faJoel Becker 191970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker if (le16_to_cpu(gd->bg_free_bits_count) > le16_to_cpu(gd->bg_bits)) { 192970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker do_error("Group descriptor #%llu has bit count %u but " 193970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker "claims that %u are free", 194970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker (unsigned long long)bh->b_blocknr, 195970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker le16_to_cpu(gd->bg_bits), 196970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker le16_to_cpu(gd->bg_free_bits_count)); 197970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker return -EINVAL; 198970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker } 199970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker 200970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker if (le16_to_cpu(gd->bg_bits) > (8 * le16_to_cpu(gd->bg_size))) { 201970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker do_error("Group descriptor #%llu has bit count %u but " 202970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker "max bitmap bits of %u", 203970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker (unsigned long long)bh->b_blocknr, 204970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker le16_to_cpu(gd->bg_bits), 205970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker 8 * le16_to_cpu(gd->bg_size)); 206970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker return -EINVAL; 207970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker } 208970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker 209970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker return 0; 210970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker} 211970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker 212970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Beckerstatic int ocfs2_validate_gd_parent(struct super_block *sb, 213970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker struct ocfs2_dinode *di, 214970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker struct buffer_head *bh, 21578c37eb0d5e6a9727b12ea0f1821795ffaa66cfeTao Ma int resize) 216970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker{ 217970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker unsigned int max_bits; 218970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; 219970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker 2207bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh if (di->i_blkno != gd->bg_parent_dinode) { 22168f64d471be38631d7196b938d9809802dd467faJoel Becker do_error("Group descriptor #%llu has bad parent " 22257e3e7971136003c96766346049aa73b82cab079Joel Becker "pointer (%llu, expected %llu)", 22368f64d471be38631d7196b938d9809802dd467faJoel Becker (unsigned long long)bh->b_blocknr, 22457e3e7971136003c96766346049aa73b82cab079Joel Becker (unsigned long long)le64_to_cpu(gd->bg_parent_dinode), 22557e3e7971136003c96766346049aa73b82cab079Joel Becker (unsigned long long)le64_to_cpu(di->i_blkno)); 22657e3e7971136003c96766346049aa73b82cab079Joel Becker return -EINVAL; 2277bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh } 2287bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh 2297bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh max_bits = le16_to_cpu(di->id2.i_chain.cl_cpg) * le16_to_cpu(di->id2.i_chain.cl_bpc); 2307bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh if (le16_to_cpu(gd->bg_bits) > max_bits) { 23168f64d471be38631d7196b938d9809802dd467faJoel Becker do_error("Group descriptor #%llu has bit count of %u", 23268f64d471be38631d7196b938d9809802dd467faJoel Becker (unsigned long long)bh->b_blocknr, 23357e3e7971136003c96766346049aa73b82cab079Joel Becker le16_to_cpu(gd->bg_bits)); 23457e3e7971136003c96766346049aa73b82cab079Joel Becker return -EINVAL; 2357bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh } 2367bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh 23778c37eb0d5e6a9727b12ea0f1821795ffaa66cfeTao Ma /* In resize, we may meet the case bg_chain == cl_next_free_rec. */ 23878c37eb0d5e6a9727b12ea0f1821795ffaa66cfeTao Ma if ((le16_to_cpu(gd->bg_chain) > 23978c37eb0d5e6a9727b12ea0f1821795ffaa66cfeTao Ma le16_to_cpu(di->id2.i_chain.cl_next_free_rec)) || 24078c37eb0d5e6a9727b12ea0f1821795ffaa66cfeTao Ma ((le16_to_cpu(gd->bg_chain) == 24178c37eb0d5e6a9727b12ea0f1821795ffaa66cfeTao Ma le16_to_cpu(di->id2.i_chain.cl_next_free_rec)) && !resize)) { 24268f64d471be38631d7196b938d9809802dd467faJoel Becker do_error("Group descriptor #%llu has bad chain %u", 24368f64d471be38631d7196b938d9809802dd467faJoel Becker (unsigned long long)bh->b_blocknr, 24457e3e7971136003c96766346049aa73b82cab079Joel Becker le16_to_cpu(gd->bg_chain)); 24557e3e7971136003c96766346049aa73b82cab079Joel Becker return -EINVAL; 2467bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh } 2477bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh 248970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker return 0; 249970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker} 2507bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh 25157e3e7971136003c96766346049aa73b82cab079Joel Becker#undef do_error 2527bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh 253970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker/* 254970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker * This version only prints errors. It does not fail the filesystem, and 255970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker * exists only for resize. 256970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker */ 257970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Beckerint ocfs2_check_group_descriptor(struct super_block *sb, 258970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker struct ocfs2_dinode *di, 259970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker struct buffer_head *bh) 260970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker{ 261970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker int rc; 262d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; 263d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker 264d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker BUG_ON(!buffer_uptodate(bh)); 265970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker 266d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker /* 267d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker * If the ecc fails, we return the error but otherwise 268d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker * leave the filesystem running. We know any error is 269d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker * local to this block. 270d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker */ 271d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &gd->bg_check); 27213723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker if (rc) { 27313723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker mlog(ML_ERROR, 27413723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker "Checksum failed for group descriptor %llu\n", 27513723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker (unsigned long long)bh->b_blocknr); 27613723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker } else 277d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker rc = ocfs2_validate_gd_self(sb, bh, 1); 278970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker if (!rc) 279970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker rc = ocfs2_validate_gd_parent(sb, di, bh, 1); 280970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker 281970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker return rc; 282970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker} 283970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker 284970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Beckerstatic int ocfs2_validate_group_descriptor(struct super_block *sb, 285970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker struct buffer_head *bh) 286970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker{ 287d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker int rc; 288d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; 289d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker 290970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker mlog(0, "Validating group descriptor %llu\n", 291970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker (unsigned long long)bh->b_blocknr); 292970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker 293d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker BUG_ON(!buffer_uptodate(bh)); 294d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker 295d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker /* 296d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker * If the ecc fails, we return the error but otherwise 297d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker * leave the filesystem running. We know any error is 298d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker * local to this block. 299d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker */ 300d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &gd->bg_check); 301d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker if (rc) 302d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker return rc; 303d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker 304d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker /* 305d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker * Errors after here are fatal. 306d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker */ 307d6b32bbb3eae3fb787f1c33bf9f767ca1ddeb208Joel Becker 308970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker return ocfs2_validate_gd_self(sb, bh, 0); 3097bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh} 3107bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh 31168f64d471be38631d7196b938d9809802dd467faJoel Beckerint ocfs2_read_group_descriptor(struct inode *inode, struct ocfs2_dinode *di, 31268f64d471be38631d7196b938d9809802dd467faJoel Becker u64 gd_blkno, struct buffer_head **bh) 31368f64d471be38631d7196b938d9809802dd467faJoel Becker{ 31468f64d471be38631d7196b938d9809802dd467faJoel Becker int rc; 31568f64d471be38631d7196b938d9809802dd467faJoel Becker struct buffer_head *tmp = *bh; 31668f64d471be38631d7196b938d9809802dd467faJoel Becker 3178cb471e8f82506937fe5e2e9fb0bf90f6b1f1170Joel Becker rc = ocfs2_read_block(INODE_CACHE(inode), gd_blkno, &tmp, 318970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker ocfs2_validate_group_descriptor); 31968f64d471be38631d7196b938d9809802dd467faJoel Becker if (rc) 32068f64d471be38631d7196b938d9809802dd467faJoel Becker goto out; 32168f64d471be38631d7196b938d9809802dd467faJoel Becker 322970e4936d7d15f35d00fd15a14f5343ba78b2fc8Joel Becker rc = ocfs2_validate_gd_parent(inode->i_sb, di, tmp, 0); 32368f64d471be38631d7196b938d9809802dd467faJoel Becker if (rc) { 32468f64d471be38631d7196b938d9809802dd467faJoel Becker brelse(tmp); 32568f64d471be38631d7196b938d9809802dd467faJoel Becker goto out; 32668f64d471be38631d7196b938d9809802dd467faJoel Becker } 32768f64d471be38631d7196b938d9809802dd467faJoel Becker 32868f64d471be38631d7196b938d9809802dd467faJoel Becker /* If ocfs2_read_block() got us a new bh, pass it up. */ 32968f64d471be38631d7196b938d9809802dd467faJoel Becker if (!*bh) 33068f64d471be38631d7196b938d9809802dd467faJoel Becker *bh = tmp; 33168f64d471be38631d7196b938d9809802dd467faJoel Becker 33268f64d471be38631d7196b938d9809802dd467faJoel Beckerout: 33368f64d471be38631d7196b938d9809802dd467faJoel Becker return rc; 33468f64d471be38631d7196b938d9809802dd467faJoel Becker} 33568f64d471be38631d7196b938d9809802dd467faJoel Becker 336798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerstatic void ocfs2_bg_discontig_add_extent(struct ocfs2_super *osb, 337798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_group_desc *bg, 338798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_chain_list *cl, 339798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u64 p_blkno, u32 clusters) 340798db35f4649eac2778381c390ed7d12de9ec767Joel Becker{ 341798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_extent_list *el = &bg->bg_list; 342798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_extent_rec *rec; 343798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 3444711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma BUG_ON(!ocfs2_supports_discontig_bg(osb)); 345798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (!el->l_next_free_rec) 346798db35f4649eac2778381c390ed7d12de9ec767Joel Becker el->l_count = cpu_to_le16(ocfs2_extent_recs_per_gd(osb->sb)); 347798db35f4649eac2778381c390ed7d12de9ec767Joel Becker rec = &el->l_recs[le16_to_cpu(el->l_next_free_rec)]; 3484711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma rec->e_blkno = cpu_to_le64(p_blkno); 349798db35f4649eac2778381c390ed7d12de9ec767Joel Becker rec->e_cpos = cpu_to_le32(le16_to_cpu(bg->bg_bits) / 350798db35f4649eac2778381c390ed7d12de9ec767Joel Becker le16_to_cpu(cl->cl_bpc)); 351798db35f4649eac2778381c390ed7d12de9ec767Joel Becker rec->e_leaf_clusters = cpu_to_le32(clusters); 352798db35f4649eac2778381c390ed7d12de9ec767Joel Becker le16_add_cpu(&bg->bg_bits, clusters * le16_to_cpu(cl->cl_bpc)); 3534711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma le16_add_cpu(&bg->bg_free_bits_count, 3544711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma clusters * le16_to_cpu(cl->cl_bpc)); 355798db35f4649eac2778381c390ed7d12de9ec767Joel Becker le16_add_cpu(&el->l_next_free_rec, 1); 356798db35f4649eac2778381c390ed7d12de9ec767Joel Becker} 357798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 3581fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fashehstatic int ocfs2_block_group_fill(handle_t *handle, 359ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode, 360ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *bg_bh, 361ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 group_blkno, 362798db35f4649eac2778381c390ed7d12de9ec767Joel Becker unsigned int group_clusters, 363ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 my_chain, 364ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_chain_list *cl) 365ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 366ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status = 0; 367798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); 368ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; 369ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct super_block * sb = alloc_inode->i_sb; 370ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 371ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 372ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 373ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (((unsigned long long) bg_bh->b_blocknr) != group_blkno) { 374b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh ocfs2_error(alloc_inode->i_sb, "group block (%llu) != " 375b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh "b_blocknr (%llu)", 376b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)group_blkno, 377ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (unsigned long long) bg_bh->b_blocknr); 378ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -EIO; 379ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 380ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 381ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 38213723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker status = ocfs2_journal_access_gd(handle, 3830cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker INODE_CACHE(alloc_inode), 38413723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker bg_bh, 38513723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker OCFS2_JOURNAL_ACCESS_CREATE); 386ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 387ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 388ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 389ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 390ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 391ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh memset(bg, 0, sb->s_blocksize); 392ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh strcpy(bg->bg_signature, OCFS2_GROUP_DESC_SIGNATURE); 393ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_generation = cpu_to_le32(OCFS2_SB(sb)->fs_generation); 3948571882c21e5073b2f96147ec4ff9b7042339e1bTao Ma bg->bg_size = cpu_to_le16(ocfs2_group_bitmap_size(sb, 1, 3958571882c21e5073b2f96147ec4ff9b7042339e1bTao Ma osb->s_feature_incompat)); 396ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_chain = cpu_to_le16(my_chain); 397ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_next_group = cl->cl_recs[my_chain].c_blkno; 398ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_parent_dinode = cpu_to_le64(OCFS2_I(alloc_inode)->ip_blkno); 399ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_blkno = cpu_to_le64(group_blkno); 400798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (group_clusters == le16_to_cpu(cl->cl_cpg)) 401798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg->bg_bits = cpu_to_le16(ocfs2_bits_per_group(cl)); 402798db35f4649eac2778381c390ed7d12de9ec767Joel Becker else 4034711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma ocfs2_bg_discontig_add_extent(osb, bg, cl, group_blkno, 404798db35f4649eac2778381c390ed7d12de9ec767Joel Becker group_clusters); 405798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 406ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* set the 1st bit in the bitmap to account for the descriptor block */ 407ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_set_bit(0, (unsigned long *)bg->bg_bitmap); 408ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_free_bits_count = cpu_to_le16(le16_to_cpu(bg->bg_bits) - 1); 409ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 410ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, bg_bh); 411ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 412ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* There is no need to zero out or otherwise initialize the 413ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * other blocks in a group - All valid FS metadata in a block 414ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * group stores the superblock fs_generation value at 415ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * allocation time. */ 416ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 417ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 418ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 419ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 420ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 421ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 422ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline u16 ocfs2_find_smallest_chain(struct ocfs2_chain_list *cl) 423ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 424ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 curr, best; 425ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 426ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh best = curr = 0; 427ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh while (curr < le16_to_cpu(cl->cl_count)) { 428ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (le32_to_cpu(cl->cl_recs[best].c_total) > 429ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(cl->cl_recs[curr].c_total)) 430ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh best = curr; 431ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh curr++; 432ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 433ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return best; 434ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 435ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 436798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerstatic struct buffer_head * 437798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerocfs2_block_group_alloc_contig(struct ocfs2_super *osb, handle_t *handle, 438798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct inode *alloc_inode, 439798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_alloc_context *ac, 440798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_chain_list *cl) 441798db35f4649eac2778381c390ed7d12de9ec767Joel Becker{ 442798db35f4649eac2778381c390ed7d12de9ec767Joel Becker int status; 443798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u32 bit_off, num_bits; 444798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u64 bg_blkno; 445798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct buffer_head *bg_bh; 446798db35f4649eac2778381c390ed7d12de9ec767Joel Becker unsigned int alloc_rec = ocfs2_find_smallest_chain(cl); 447798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 4481ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Becker status = ocfs2_claim_clusters(handle, ac, 449798db35f4649eac2778381c390ed7d12de9ec767Joel Becker le16_to_cpu(cl->cl_cpg), &bit_off, 450798db35f4649eac2778381c390ed7d12de9ec767Joel Becker &num_bits); 451798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status < 0) { 452798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status != -ENOSPC) 453798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 454798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 455798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 456798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 457798db35f4649eac2778381c390ed7d12de9ec767Joel Becker /* setup the group */ 458798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_blkno = ocfs2_clusters_to_blocks(osb->sb, bit_off); 459798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog(0, "new descriptor, record %u, at block %llu\n", 460798db35f4649eac2778381c390ed7d12de9ec767Joel Becker alloc_rec, (unsigned long long)bg_blkno); 461798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 462798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh = sb_getblk(osb->sb, bg_blkno); 463798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (!bg_bh) { 464798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = -EIO; 465798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 466798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 467798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 468798db35f4649eac2778381c390ed7d12de9ec767Joel Becker ocfs2_set_new_buffer_uptodate(INODE_CACHE(alloc_inode), bg_bh); 469798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 470798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = ocfs2_block_group_fill(handle, alloc_inode, bg_bh, 471798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_blkno, num_bits, alloc_rec, cl); 472798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status < 0) { 473798db35f4649eac2778381c390ed7d12de9ec767Joel Becker brelse(bg_bh); 474798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 475798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 476798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 477798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerbail: 478798db35f4649eac2778381c390ed7d12de9ec767Joel Becker return status ? ERR_PTR(status) : bg_bh; 479798db35f4649eac2778381c390ed7d12de9ec767Joel Becker} 480798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 481798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerstatic int ocfs2_block_group_claim_bits(struct ocfs2_super *osb, 482798db35f4649eac2778381c390ed7d12de9ec767Joel Becker handle_t *handle, 483798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_alloc_context *ac, 484798db35f4649eac2778381c390ed7d12de9ec767Joel Becker unsigned int min_bits, 485798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u32 *bit_off, u32 *num_bits) 486798db35f4649eac2778381c390ed7d12de9ec767Joel Becker{ 487798db35f4649eac2778381c390ed7d12de9ec767Joel Becker int status; 488798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 489798db35f4649eac2778381c390ed7d12de9ec767Joel Becker while (min_bits) { 4901ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Becker status = ocfs2_claim_clusters(handle, ac, min_bits, 491798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bit_off, num_bits); 492798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status != -ENOSPC) 493798db35f4649eac2778381c390ed7d12de9ec767Joel Becker break; 494798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 495798db35f4649eac2778381c390ed7d12de9ec767Joel Becker min_bits >>= 1; 496798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 497798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 498798db35f4649eac2778381c390ed7d12de9ec767Joel Becker return status; 499798db35f4649eac2778381c390ed7d12de9ec767Joel Becker} 500798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 501798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerstatic int ocfs2_block_group_grow_discontig(handle_t *handle, 502798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct inode *alloc_inode, 503798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct buffer_head *bg_bh, 504798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_alloc_context *ac, 505798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_chain_list *cl, 506798db35f4649eac2778381c390ed7d12de9ec767Joel Becker unsigned int min_bits) 507798db35f4649eac2778381c390ed7d12de9ec767Joel Becker{ 508798db35f4649eac2778381c390ed7d12de9ec767Joel Becker int status; 509798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); 510798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_group_desc *bg = 511798db35f4649eac2778381c390ed7d12de9ec767Joel Becker (struct ocfs2_group_desc *)bg_bh->b_data; 5124711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma unsigned int needed = le16_to_cpu(cl->cl_cpg) - 5134711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma le16_to_cpu(bg->bg_bits) / le16_to_cpu(cl->cl_bpc); 514798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u32 p_cpos, clusters; 515798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u64 p_blkno; 516798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_extent_list *el = &bg->bg_list; 517798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 518798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = ocfs2_journal_access_gd(handle, 519798db35f4649eac2778381c390ed7d12de9ec767Joel Becker INODE_CACHE(alloc_inode), 520798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh, 521798db35f4649eac2778381c390ed7d12de9ec767Joel Becker OCFS2_JOURNAL_ACCESS_CREATE); 522798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status < 0) { 523798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 524798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 525798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 526798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 527798db35f4649eac2778381c390ed7d12de9ec767Joel Becker while ((needed > 0) && (le16_to_cpu(el->l_next_free_rec) < 528798db35f4649eac2778381c390ed7d12de9ec767Joel Becker le16_to_cpu(el->l_count))) { 529798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (min_bits > needed) 530798db35f4649eac2778381c390ed7d12de9ec767Joel Becker min_bits = needed; 531798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = ocfs2_block_group_claim_bits(osb, handle, ac, 532798db35f4649eac2778381c390ed7d12de9ec767Joel Becker min_bits, &p_cpos, 533798db35f4649eac2778381c390ed7d12de9ec767Joel Becker &clusters); 534798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status < 0) { 535798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status != -ENOSPC) 536798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 537798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 538798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 539798db35f4649eac2778381c390ed7d12de9ec767Joel Becker p_blkno = ocfs2_clusters_to_blocks(osb->sb, p_cpos); 540798db35f4649eac2778381c390ed7d12de9ec767Joel Becker ocfs2_bg_discontig_add_extent(osb, bg, cl, p_blkno, 541798db35f4649eac2778381c390ed7d12de9ec767Joel Becker clusters); 542798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 543798db35f4649eac2778381c390ed7d12de9ec767Joel Becker min_bits = clusters; 5444711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma needed = le16_to_cpu(cl->cl_cpg) - 5454711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma le16_to_cpu(bg->bg_bits) / le16_to_cpu(cl->cl_bpc); 546798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 547798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 548798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (needed > 0) { 5494711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma /* 5504711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma * We have used up all the extent rec but can't fill up 5514711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma * the cpg. So bail out. 5524711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma */ 5534711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma status = -ENOSPC; 5544711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma goto bail; 555798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 556798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 557798db35f4649eac2778381c390ed7d12de9ec767Joel Becker ocfs2_journal_dirty(handle, bg_bh); 558798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 559798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerbail: 560798db35f4649eac2778381c390ed7d12de9ec767Joel Becker return status; 561798db35f4649eac2778381c390ed7d12de9ec767Joel Becker} 562798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 5638b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Beckerstatic void ocfs2_bg_alloc_cleanup(handle_t *handle, 5648b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker struct ocfs2_alloc_context *cluster_ac, 5658b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker struct inode *alloc_inode, 5668b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker struct buffer_head *bg_bh) 567798db35f4649eac2778381c390ed7d12de9ec767Joel Becker{ 5688b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker int i, ret; 569798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_group_desc *bg; 570798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_extent_list *el; 571798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_extent_rec *rec; 572798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 573798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (!bg_bh) 574798db35f4649eac2778381c390ed7d12de9ec767Joel Becker return; 575798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 576798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg = (struct ocfs2_group_desc *)bg_bh->b_data; 577798db35f4649eac2778381c390ed7d12de9ec767Joel Becker el = &bg->bg_list; 578798db35f4649eac2778381c390ed7d12de9ec767Joel Becker for (i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) { 579798db35f4649eac2778381c390ed7d12de9ec767Joel Becker rec = &el->l_recs[i]; 5808b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker ret = ocfs2_free_clusters(handle, cluster_ac->ac_inode, 5818b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker cluster_ac->ac_bh, 5828b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker le64_to_cpu(rec->e_blkno), 5838b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker le32_to_cpu(rec->e_leaf_clusters)); 5848b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker if (ret) 5858b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker mlog_errno(ret); 5868b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker /* Try all the clusters to free */ 587798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 588798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 589798db35f4649eac2778381c390ed7d12de9ec767Joel Becker ocfs2_remove_from_cache(INODE_CACHE(alloc_inode), bg_bh); 590798db35f4649eac2778381c390ed7d12de9ec767Joel Becker brelse(bg_bh); 591798db35f4649eac2778381c390ed7d12de9ec767Joel Becker} 592798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 593798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerstatic struct buffer_head * 594798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerocfs2_block_group_alloc_discontig(handle_t *handle, 595798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct inode *alloc_inode, 596798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_alloc_context *ac, 5978b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker struct ocfs2_chain_list *cl) 598798db35f4649eac2778381c390ed7d12de9ec767Joel Becker{ 599798db35f4649eac2778381c390ed7d12de9ec767Joel Becker int status; 600798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u32 bit_off, num_bits; 601798db35f4649eac2778381c390ed7d12de9ec767Joel Becker u64 bg_blkno; 602798db35f4649eac2778381c390ed7d12de9ec767Joel Becker unsigned int min_bits = le16_to_cpu(cl->cl_cpg) >> 1; 603798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct buffer_head *bg_bh = NULL; 604798db35f4649eac2778381c390ed7d12de9ec767Joel Becker unsigned int alloc_rec = ocfs2_find_smallest_chain(cl); 605798db35f4649eac2778381c390ed7d12de9ec767Joel Becker struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); 606798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 6074711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma if (!ocfs2_supports_discontig_bg(osb)) { 608798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = -ENOSPC; 609798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 610798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 611798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 6128b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker status = ocfs2_extend_trans(handle, 6138b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker ocfs2_calc_bg_discontig_credits(osb->sb)); 6148b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker if (status) { 6158b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker mlog_errno(status); 6168b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker goto bail; 6178b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker } 6188b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker 61995ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker /* 62095ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker * We're going to be grabbing from multiple cluster groups. 62195ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker * We don't have enough credits to relink them all, and the 62295ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker * cluster groups will be staying in cache for the duration of 62395ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker * this operation. 62495ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker */ 62595ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker ac->ac_allow_chain_relink = 0; 62695ec0adf0b56d6a3f0ca1ec87173311898486b2eJoel Becker 627798db35f4649eac2778381c390ed7d12de9ec767Joel Becker /* Claim the first region */ 628798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = ocfs2_block_group_claim_bits(osb, handle, ac, min_bits, 629798db35f4649eac2778381c390ed7d12de9ec767Joel Becker &bit_off, &num_bits); 630798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status < 0) { 631798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status != -ENOSPC) 632798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 633798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 634798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 635798db35f4649eac2778381c390ed7d12de9ec767Joel Becker min_bits = num_bits; 636798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 637798db35f4649eac2778381c390ed7d12de9ec767Joel Becker /* setup the group */ 638798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_blkno = ocfs2_clusters_to_blocks(osb->sb, bit_off); 639798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog(0, "new descriptor, record %u, at block %llu\n", 640798db35f4649eac2778381c390ed7d12de9ec767Joel Becker alloc_rec, (unsigned long long)bg_blkno); 641798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 642798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh = sb_getblk(osb->sb, bg_blkno); 643798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (!bg_bh) { 644798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = -EIO; 645798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 646798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 647798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 648798db35f4649eac2778381c390ed7d12de9ec767Joel Becker ocfs2_set_new_buffer_uptodate(INODE_CACHE(alloc_inode), bg_bh); 649798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 650798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = ocfs2_block_group_fill(handle, alloc_inode, bg_bh, 651798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_blkno, num_bits, alloc_rec, cl); 652798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status < 0) { 653798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 654798db35f4649eac2778381c390ed7d12de9ec767Joel Becker goto bail; 655798db35f4649eac2778381c390ed7d12de9ec767Joel Becker } 656798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 657798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = ocfs2_block_group_grow_discontig(handle, alloc_inode, 658798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh, ac, cl, min_bits); 659798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status) 660798db35f4649eac2778381c390ed7d12de9ec767Joel Becker mlog_errno(status); 661798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 662798db35f4649eac2778381c390ed7d12de9ec767Joel Beckerbail: 663798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (status) 6648b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker ocfs2_bg_alloc_cleanup(handle, ac, alloc_inode, bg_bh); 665798db35f4649eac2778381c390ed7d12de9ec767Joel Becker return status ? ERR_PTR(status) : bg_bh; 666798db35f4649eac2778381c390ed7d12de9ec767Joel Becker} 667798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 668ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* 669ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * We expect the block group allocator to already be locked. 670ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh */ 671ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_block_group_alloc(struct ocfs2_super *osb, 672ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode, 6731187c968852e3c668f3b9376083851f81f6eee22Joel Becker struct buffer_head *bh, 67460ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma u64 max_block, 675feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma u64 *last_alloc_group, 67660ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma int flags) 677ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 678ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status, credits; 679ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data; 680ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_chain_list *cl; 681ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_alloc_context *ac = NULL; 6821fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fasheh handle_t *handle = NULL; 6834711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma u16 alloc_rec; 684ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *bg_bh = NULL; 685ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg; 686ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 687ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ocfs2_is_cluster_bitmap(alloc_inode)); 688ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 689ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 690ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 691ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh cl = &fe->id2.i_chain; 6921187c968852e3c668f3b9376083851f81f6eee22Joel Becker status = ocfs2_reserve_clusters_with_limit(osb, 6931187c968852e3c668f3b9376083851f81f6eee22Joel Becker le16_to_cpu(cl->cl_cpg), 69460ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma max_block, flags, &ac); 695ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 696ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 697ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 698ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 699ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 700ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 701ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh credits = ocfs2_calc_group_alloc_credits(osb->sb, 702ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le16_to_cpu(cl->cl_cpg)); 70365eff9ccf86d63eb5c3e9071450a36e4e4fa9564Mark Fasheh handle = ocfs2_start_trans(osb, credits); 704ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (IS_ERR(handle)) { 705ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = PTR_ERR(handle); 706ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh handle = NULL; 707ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 708ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 709ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 710ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 711feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma if (last_alloc_group && *last_alloc_group != 0) { 712feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma mlog(0, "use old allocation group %llu for block group alloc\n", 713feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma (unsigned long long)*last_alloc_group); 714feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma ac->ac_last_group = *last_alloc_group; 715feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma } 716798db35f4649eac2778381c390ed7d12de9ec767Joel Becker 717798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh = ocfs2_block_group_alloc_contig(osb, handle, alloc_inode, 718798db35f4649eac2778381c390ed7d12de9ec767Joel Becker ac, cl); 719798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (IS_ERR(bg_bh) && (PTR_ERR(bg_bh) == -ENOSPC)) 720798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh = ocfs2_block_group_alloc_discontig(handle, 721798db35f4649eac2778381c390ed7d12de9ec767Joel Becker alloc_inode, 7228b06bc592ebc5a31e8d0b9c2ab17c6e78dde1f86Joel Becker ac, cl); 723798db35f4649eac2778381c390ed7d12de9ec767Joel Becker if (IS_ERR(bg_bh)) { 724798db35f4649eac2778381c390ed7d12de9ec767Joel Becker status = PTR_ERR(bg_bh); 725798db35f4649eac2778381c390ed7d12de9ec767Joel Becker bg_bh = NULL; 726ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 727ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 728ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 729ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 730ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg = (struct ocfs2_group_desc *) bg_bh->b_data; 731ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 7320cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), 73313723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker bh, OCFS2_JOURNAL_ACCESS_WRITE); 734ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 735ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 736ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 737ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 738ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 7394711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma alloc_rec = le16_to_cpu(bg->bg_chain); 7404711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma le32_add_cpu(&cl->cl_recs[alloc_rec].c_free, 741ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le16_to_cpu(bg->bg_free_bits_count)); 7424711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma le32_add_cpu(&cl->cl_recs[alloc_rec].c_total, 743798db35f4649eac2778381c390ed7d12de9ec767Joel Becker le16_to_cpu(bg->bg_bits)); 7444711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma cl->cl_recs[alloc_rec].c_blkno = cpu_to_le64(bg->bg_blkno); 745ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (le16_to_cpu(cl->cl_next_free_rec) < le16_to_cpu(cl->cl_count)) 746ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le16_add_cpu(&cl->cl_next_free_rec, 1); 747ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 748ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_add_cpu(&fe->id1.bitmap1.i_used, le16_to_cpu(bg->bg_bits) - 749ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le16_to_cpu(bg->bg_free_bits_count)); 750ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_add_cpu(&fe->id1.bitmap1.i_total, le16_to_cpu(bg->bg_bits)); 751ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_add_cpu(&fe->i_clusters, le16_to_cpu(cl->cl_cpg)); 752ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 753ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, bh); 754ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 755ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh spin_lock(&OCFS2_I(alloc_inode)->ip_lock); 756ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh OCFS2_I(alloc_inode)->ip_clusters = le32_to_cpu(fe->i_clusters); 757ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe->i_size = cpu_to_le64(ocfs2_clusters_to_bytes(alloc_inode->i_sb, 758ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->i_clusters))); 759ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh spin_unlock(&OCFS2_I(alloc_inode)->ip_lock); 760ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh i_size_write(alloc_inode, le64_to_cpu(fe->i_size)); 7618110b073a9135acf0a71bccfc20c0d1023f179c6Mark Fasheh alloc_inode->i_blocks = ocfs2_inode_sector_count(alloc_inode); 762ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 763ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = 0; 764feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma 765feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma /* save the new last alloc group so that the caller can cache it. */ 766feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma if (last_alloc_group) 767feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma *last_alloc_group = ac->ac_last_group; 768feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma 769ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 770ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (handle) 77102dc1af44e9fa4b8801169891b3a1ba4047537adMark Fasheh ocfs2_commit_trans(osb, handle); 772ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 773ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (ac) 774ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_free_alloc_context(ac); 775ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 776a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh brelse(bg_bh); 777ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 778ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 779ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 780ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 781ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 782ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_reserve_suballoc_bits(struct ocfs2_super *osb, 783da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh struct ocfs2_alloc_context *ac, 784da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh int type, 785ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma u32 slot, 786feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma u64 *last_alloc_group, 78760ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma int flags) 788ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 789ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 790ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted = ac->ac_bits_wanted; 791da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh struct inode *alloc_inode; 792ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *bh = NULL; 793ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe; 794ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 free_bits; 795ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 796ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 797ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 798da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh alloc_inode = ocfs2_get_system_file_inode(osb, type, slot); 799da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh if (!alloc_inode) { 800da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh mlog_errno(-EINVAL); 801da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh return -EINVAL; 802da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh } 803ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 804da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh mutex_lock(&alloc_inode->i_mutex); 805da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh 806e63aecb651ba73dffc62f9608ee1b7ae2a0ffd4bMark Fasheh status = ocfs2_inode_lock(alloc_inode, &bh, 1); 807ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 808da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh mutex_unlock(&alloc_inode->i_mutex); 809da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh iput(alloc_inode); 810da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh 811ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 812da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh return status; 813ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 814ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 815da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh ac->ac_inode = alloc_inode; 816a4a4891164d4f6f383cc17e7c90828a7ca6a1146Tao Ma ac->ac_alloc_slot = slot; 817da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh 818ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe = (struct ocfs2_dinode *) bh->b_data; 81910995aa2451afa20b721cc7de856cae1a13dba57Joel Becker 82010995aa2451afa20b721cc7de856cae1a13dba57Joel Becker /* The bh was validated by the inode read inside 82110995aa2451afa20b721cc7de856cae1a13dba57Joel Becker * ocfs2_inode_lock(). Any corruption is a code bug. */ 82210995aa2451afa20b721cc7de856cae1a13dba57Joel Becker BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); 82310995aa2451afa20b721cc7de856cae1a13dba57Joel Becker 824ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!(fe->i_flags & cpu_to_le32(OCFS2_CHAIN_FL))) { 825b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh ocfs2_error(alloc_inode->i_sb, "Invalid chain allocator %llu", 826b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)le64_to_cpu(fe->i_blkno)); 827ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -EIO; 828ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 829ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 830ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 831ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh free_bits = le32_to_cpu(fe->id1.bitmap1.i_total) - 832ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->id1.bitmap1.i_used); 833ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 834ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (bits_wanted > free_bits) { 835ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* cluster bitmap never grows */ 836ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (ocfs2_is_cluster_bitmap(alloc_inode)) { 837ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog(0, "Disk Full: wanted=%u, free_bits=%u\n", 838ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bits_wanted, free_bits); 839ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOSPC; 840ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 841ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 842ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 84360ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma if (!(flags & ALLOC_NEW_GROUP)) { 844ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma mlog(0, "Alloc File %u Full: wanted=%u, free_bits=%u, " 845ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma "and we don't alloc a new group for it.\n", 846ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma slot, bits_wanted, free_bits); 847ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma status = -ENOSPC; 848ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma goto bail; 849ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma } 850ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma 8511187c968852e3c668f3b9376083851f81f6eee22Joel Becker status = ocfs2_block_group_alloc(osb, alloc_inode, bh, 852feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma ac->ac_max_block, 853feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma last_alloc_group, flags); 854ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 855ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 856ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 857ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 858ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 859ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh atomic_inc(&osb->alloc_stats.bg_extends); 860ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 861ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* You should never ask for this much metadata */ 862ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(bits_wanted > 863ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (le32_to_cpu(fe->id1.bitmap1.i_total) 864ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh - le32_to_cpu(fe->id1.bitmap1.i_used))); 865ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 866ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 867ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh get_bh(bh); 868ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_bh = bh; 869ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 870a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh brelse(bh); 871ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 872ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 873ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 874ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 875ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 876b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb) 877b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 878b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_lock(&osb->osb_lock); 879b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang osb->s_inode_steal_slot = OCFS2_INVALID_SLOT; 880b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_unlock(&osb->osb_lock); 881b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang atomic_set(&osb->s_num_inodes_stolen, 0); 882b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 883b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 884b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic void ocfs2_init_meta_steal_slot(struct ocfs2_super *osb) 885b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 886b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_lock(&osb->osb_lock); 887b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang osb->s_meta_steal_slot = OCFS2_INVALID_SLOT; 888b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_unlock(&osb->osb_lock); 889b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang atomic_set(&osb->s_num_meta_stolen, 0); 890b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 891b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 892b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangvoid ocfs2_init_steal_slots(struct ocfs2_super *osb) 893b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 894b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang ocfs2_init_inode_steal_slot(osb); 895b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang ocfs2_init_meta_steal_slot(osb); 896b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 897b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 898b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic void __ocfs2_set_steal_slot(struct ocfs2_super *osb, int slot, int type) 899b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 900b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_lock(&osb->osb_lock); 901b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (type == INODE_ALLOC_SYSTEM_INODE) 902b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang osb->s_inode_steal_slot = slot; 903b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang else if (type == EXTENT_ALLOC_SYSTEM_INODE) 904b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang osb->s_meta_steal_slot = slot; 905b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_unlock(&osb->osb_lock); 906b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 907b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 908b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic int __ocfs2_get_steal_slot(struct ocfs2_super *osb, int type) 909b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 910b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang int slot = OCFS2_INVALID_SLOT; 911b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 912b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_lock(&osb->osb_lock); 913b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (type == INODE_ALLOC_SYSTEM_INODE) 914b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang slot = osb->s_inode_steal_slot; 915b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang else if (type == EXTENT_ALLOC_SYSTEM_INODE) 916b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang slot = osb->s_meta_steal_slot; 917b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang spin_unlock(&osb->osb_lock); 918b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 919b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang return slot; 920b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 921b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 922b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic int ocfs2_get_inode_steal_slot(struct ocfs2_super *osb) 923b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 924b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang return __ocfs2_get_steal_slot(osb, INODE_ALLOC_SYSTEM_INODE); 925b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 926b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 927b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic int ocfs2_get_meta_steal_slot(struct ocfs2_super *osb) 928b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 929b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang return __ocfs2_get_steal_slot(osb, EXTENT_ALLOC_SYSTEM_INODE); 930b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 931b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 932b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic int ocfs2_steal_resource(struct ocfs2_super *osb, 933b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang struct ocfs2_alloc_context *ac, 934b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang int type) 935b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 936b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang int i, status = -ENOSPC; 937b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang int slot = __ocfs2_get_steal_slot(osb, type); 938b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 939b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang /* Start to steal resource from the first slot after ours. */ 940b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (slot == OCFS2_INVALID_SLOT) 941b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang slot = osb->slot_num + 1; 942b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 943b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang for (i = 0; i < osb->max_slots; i++, slot++) { 944b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (slot == osb->max_slots) 945b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang slot = 0; 946b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 947b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (slot == osb->slot_num) 948b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang continue; 949b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 950b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang status = ocfs2_reserve_suballoc_bits(osb, ac, 951b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang type, 952b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang (u32)slot, NULL, 953b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang NOT_ALLOC_NEW_GROUP); 954b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (status >= 0) { 955b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang __ocfs2_set_steal_slot(osb, slot, type); 956b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang break; 957b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang } 958b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 959b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang ocfs2_free_ac_resource(ac); 960b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang } 961b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 962b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang return status; 963b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 964b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 965b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic int ocfs2_steal_inode(struct ocfs2_super *osb, 966b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang struct ocfs2_alloc_context *ac) 967b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 968b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang return ocfs2_steal_resource(osb, ac, INODE_ALLOC_SYSTEM_INODE); 969b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 970b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 971b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangstatic int ocfs2_steal_meta(struct ocfs2_super *osb, 972b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang struct ocfs2_alloc_context *ac) 973b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang{ 974b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang return ocfs2_steal_resource(osb, ac, EXTENT_ALLOC_SYSTEM_INODE); 975b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang} 976b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 977cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yangint ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb, 978cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang int blocks, 979cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang struct ocfs2_alloc_context **ac) 980ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 981ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 982b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang int slot = ocfs2_get_meta_steal_slot(osb); 983ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 984cd86128088554d64fea1679191509f00e6353c5bRobert P. J. Day *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); 985ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!(*ac)) { 986ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOMEM; 987ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 988ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 989ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 990ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 991cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang (*ac)->ac_bits_wanted = blocks; 992ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (*ac)->ac_which = OCFS2_AC_USE_META; 993ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (*ac)->ac_group_search = ocfs2_block_group_search; 994ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 995b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (slot != OCFS2_INVALID_SLOT && 996b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang atomic_read(&osb->s_num_meta_stolen) < OCFS2_MAX_TO_STEAL) 997b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang goto extent_steal; 998b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 999b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang atomic_set(&osb->s_num_meta_stolen, 0); 1000da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh status = ocfs2_reserve_suballoc_bits(osb, (*ac), 1001ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma EXTENT_ALLOC_SYSTEM_INODE, 1002b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang (u32)osb->slot_num, NULL, 100333d5d380d667ad264675cfdb297dfc3c5b6542ccMark Fasheh ALLOC_GROUPS_FROM_GLOBAL|ALLOC_NEW_GROUP); 1004b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 1005b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 1006b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (status >= 0) { 1007b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang status = 0; 1008b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang if (slot != OCFS2_INVALID_SLOT) 1009b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang ocfs2_init_meta_steal_slot(osb); 1010b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang goto bail; 1011b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang } else if (status < 0 && status != -ENOSPC) { 1012b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang mlog_errno(status); 1013b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang goto bail; 1014b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang } 1015b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 1016b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang ocfs2_free_ac_resource(*ac); 1017b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang 1018b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yangextent_steal: 1019b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang status = ocfs2_steal_meta(osb, *ac); 1020b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang atomic_inc(&osb->s_num_meta_stolen); 1021ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1022ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 1023ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1024ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1025ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1026ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1027ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = 0; 1028ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 1029ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if ((status < 0) && *ac) { 1030ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_free_alloc_context(*ac); 1031ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *ac = NULL; 1032ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1033ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1034ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 1035ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1036ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1037ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1038cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yangint ocfs2_reserve_new_metadata(struct ocfs2_super *osb, 1039cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang struct ocfs2_extent_list *root_el, 1040cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang struct ocfs2_alloc_context **ac) 1041cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang{ 1042cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang return ocfs2_reserve_new_metadata_blocks(osb, 1043cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang ocfs2_extend_meta_needed(root_el), 1044cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang ac); 1045cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang} 1046cf1d6c763fbcb115263114302485ad17e7933d87Tiger Yang 1047ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehint ocfs2_reserve_new_inode(struct ocfs2_super *osb, 1048ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_alloc_context **ac) 1049ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1050ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1051b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang int slot = ocfs2_get_inode_steal_slot(osb); 1052feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma u64 alloc_group; 1053ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1054cd86128088554d64fea1679191509f00e6353c5bRobert P. J. Day *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); 1055ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!(*ac)) { 1056ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOMEM; 1057ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1058ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1059ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1060ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1061ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (*ac)->ac_bits_wanted = 1; 1062ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (*ac)->ac_which = OCFS2_AC_USE_INODE; 1063ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1064ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (*ac)->ac_group_search = ocfs2_block_group_search; 1065ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 10664d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma /* 10671187c968852e3c668f3b9376083851f81f6eee22Joel Becker * stat(2) can't handle i_ino > 32bits, so we tell the 10681187c968852e3c668f3b9376083851f81f6eee22Joel Becker * lower levels not to allocate us a block group past that 106912462f1d9f0b96389497438dc2730c6f7410be82Joel Becker * limit. The 'inode64' mount option avoids this behavior. 10701187c968852e3c668f3b9376083851f81f6eee22Joel Becker */ 107112462f1d9f0b96389497438dc2730c6f7410be82Joel Becker if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64)) 107212462f1d9f0b96389497438dc2730c6f7410be82Joel Becker (*ac)->ac_max_block = (u32)~0U; 10731187c968852e3c668f3b9376083851f81f6eee22Joel Becker 10741187c968852e3c668f3b9376083851f81f6eee22Joel Becker /* 10754d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * slot is set when we successfully steal inode from other nodes. 10764d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * It is reset in 3 places: 10774d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * 1. when we flush the truncate log 10784d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * 2. when we complete local alloc recovery. 10794d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * 3. when we successfully allocate from our own slot. 10804d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * After it is set, we will go on stealing inodes until we find the 10814d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * need to check our slots to see whether there is some space for us. 10824d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma */ 10834d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma if (slot != OCFS2_INVALID_SLOT && 1084b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang atomic_read(&osb->s_num_inodes_stolen) < OCFS2_MAX_TO_STEAL) 10854d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma goto inode_steal; 10864d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma 10874d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma atomic_set(&osb->s_num_inodes_stolen, 0); 1088feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma alloc_group = osb->osb_inode_alloc_group; 1089da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh status = ocfs2_reserve_suballoc_bits(osb, *ac, 1090da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh INODE_ALLOC_SYSTEM_INODE, 1091b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang (u32)osb->slot_num, 1092feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma &alloc_group, 109360ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma ALLOC_NEW_GROUP | 109460ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma ALLOC_GROUPS_FROM_GLOBAL); 10954d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma if (status >= 0) { 10964d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma status = 0; 10974d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma 1098feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma spin_lock(&osb->osb_lock); 1099feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma osb->osb_inode_alloc_group = alloc_group; 1100feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma spin_unlock(&osb->osb_lock); 1101feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma mlog(0, "after reservation, new allocation group is " 1102feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma "%llu\n", (unsigned long long)alloc_group); 1103feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma 11044d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma /* 11054d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * Some inodes must be freed by us, so try to allocate 11064d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma * from our own next time. 11074d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma */ 11084d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma if (slot != OCFS2_INVALID_SLOT) 11094d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma ocfs2_init_inode_steal_slot(osb); 11104d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma goto bail; 11114d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma } else if (status < 0 && status != -ENOSPC) { 11124d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma mlog_errno(status); 11134d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma goto bail; 11144d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma } 11154d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma 11164d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma ocfs2_free_ac_resource(*ac); 11174d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma 11184d0ddb2ce25db2254d468233d942276ecf40bff8Tao Mainode_steal: 1119b89c54282db0c8634a2d2dc200f196d571750ce5Tiger Yang status = ocfs2_steal_inode(osb, *ac); 11204d0ddb2ce25db2254d468233d942276ecf40bff8Tao Ma atomic_inc(&osb->s_num_inodes_stolen); 1121ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1122ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 1123ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1124ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1125ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1126ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1127ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = 0; 1128ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 1129ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if ((status < 0) && *ac) { 1130ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_free_alloc_context(*ac); 1131ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *ac = NULL; 1132ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1133ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1134ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 1135ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1136ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1137ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1138ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* local alloc code has to do the same thing, so rather than do this 1139ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * twice.. */ 1140ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehint ocfs2_reserve_cluster_bitmap_bits(struct ocfs2_super *osb, 1141ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_alloc_context *ac) 1142ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1143ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1144ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1145ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_which = OCFS2_AC_USE_MAIN; 1146ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_group_search = ocfs2_cluster_group_search; 1147ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1148da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh status = ocfs2_reserve_suballoc_bits(osb, ac, 1149da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh GLOBAL_BITMAP_SYSTEM_INODE, 1150feb473a6e8bd19297d0f3bb377b25055c0228c0aTao Ma OCFS2_INVALID_SLOT, NULL, 1151ffda89a3bf3b968bdc268584c6bc1da5c173cf12Tao Ma ALLOC_NEW_GROUP); 1152da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh if (status < 0 && status != -ENOSPC) { 1153ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1154da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh goto bail; 1155da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh } 1156da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh 1157ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 1158ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1159ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1160ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1161ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* Callers don't need to care which bitmap (local alloc or main) to 1162ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * use so we figure it out for them, but unfortunately this clutters 1163ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * things a bit. */ 11641187c968852e3c668f3b9376083851f81f6eee22Joel Beckerstatic int ocfs2_reserve_clusters_with_limit(struct ocfs2_super *osb, 11651187c968852e3c668f3b9376083851f81f6eee22Joel Becker u32 bits_wanted, u64 max_block, 116660ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma int flags, 11671187c968852e3c668f3b9376083851f81f6eee22Joel Becker struct ocfs2_alloc_context **ac) 1168ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1169ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1170ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1171ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 1172ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1173cd86128088554d64fea1679191509f00e6353c5bRobert P. J. Day *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); 1174ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!(*ac)) { 1175ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOMEM; 1176ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1177ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1178ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1179ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1180ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (*ac)->ac_bits_wanted = bits_wanted; 11811187c968852e3c668f3b9376083851f81f6eee22Joel Becker (*ac)->ac_max_block = max_block; 1182ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1183ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOSPC; 118460ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma if (!(flags & ALLOC_GROUPS_FROM_GLOBAL) && 118560ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma ocfs2_alloc_should_use_local(osb, bits_wanted)) { 1186ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = ocfs2_reserve_local_alloc_bits(osb, 1187ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bits_wanted, 1188ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *ac); 1189a57c8fd2ad238258cc983049008aea5f985804b2Mark Fasheh if ((status < 0) && (status != -ENOSPC)) { 1190ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1191ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1192ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1193ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1194ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1195ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status == -ENOSPC) { 1196ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = ocfs2_reserve_cluster_bitmap_bits(osb, *ac); 1197ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1198ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 1199ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1200ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1201ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1202ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1203ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1204ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = 0; 1205ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 1206ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if ((status < 0) && *ac) { 1207ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_free_alloc_context(*ac); 1208ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *ac = NULL; 1209ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1210ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1211ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 1212ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1213ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1214ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 12151187c968852e3c668f3b9376083851f81f6eee22Joel Beckerint ocfs2_reserve_clusters(struct ocfs2_super *osb, 12161187c968852e3c668f3b9376083851f81f6eee22Joel Becker u32 bits_wanted, 12171187c968852e3c668f3b9376083851f81f6eee22Joel Becker struct ocfs2_alloc_context **ac) 12181187c968852e3c668f3b9376083851f81f6eee22Joel Becker{ 121960ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma return ocfs2_reserve_clusters_with_limit(osb, bits_wanted, 0, 122060ca81e82dae4aa2e8ae84cf96b4d08535931669Tao Ma ALLOC_NEW_GROUP, ac); 12211187c968852e3c668f3b9376083851f81f6eee22Joel Becker} 12221187c968852e3c668f3b9376083851f81f6eee22Joel Becker 1223ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* 1224ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * More or less lifted from ext3. I'll leave their description below: 1225ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 1226ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * "For ext3 allocations, we must not reuse any blocks which are 1227ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * allocated in the bitmap buffer's "last committed data" copy. This 1228ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * prevents deletes from freeing up the page for reuse until we have 1229ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * committed the delete transaction. 1230ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 1231ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * If we didn't do this, then deleting something and reallocating it as 1232ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * data would allow the old block to be overwritten before the 1233ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * transaction committed (because we force data to disk before commit). 1234ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * This would lead to corruption if we crashed between overwriting the 1235ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * data and committing the delete. 1236ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 1237ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * @@@ We may want to make this allocation behaviour conditional on 1238ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * data-writes at some point, and disable it for metadata allocations or 1239ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * sync-data inodes." 1240ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 1241ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * Note: OCFS2 already does this differently for metadata vs data 1242c78bad11fbf1272ea021f56458025dc98486d6f4Joe Perches * allocations, as those bitmaps are separate and undo access is never 1243ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * called on a metadata group descriptor. 1244ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh */ 1245ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_test_bg_bit_allocatable(struct buffer_head *bg_bh, 1246ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int nr) 1247ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1248ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; 124994e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran int ret; 1250ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1251ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (ocfs2_test_bit(nr, (unsigned long *)bg->bg_bitmap)) 1252ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return 0; 125394e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran 125494e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran if (!buffer_jbd(bg_bh)) 1255ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return 1; 1256ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 125794e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran jbd_lock_bh_state(bg_bh); 1258ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg = (struct ocfs2_group_desc *) bh2jh(bg_bh)->b_committed_data; 125994e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran if (bg) 126094e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran ret = !ocfs2_test_bit(nr, (unsigned long *)bg->bg_bitmap); 126194e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran else 126294e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran ret = 1; 126394e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran jbd_unlock_bh_state(bg_bh); 126494e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran 126594e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran return ret; 1266ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1267ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1268ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_block_group_find_clear_bits(struct ocfs2_super *osb, 1269ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *bg_bh, 1270ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh unsigned int bits_wanted, 12717bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh unsigned int total_bits, 12727d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res) 1273ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1274ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh void *bitmap; 1275ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 best_offset, best_size; 1276ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int offset, start, found, status = 0; 1277ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; 1278ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 12794203530613280281868b3ca36c817530bca3825cJoel Becker /* Callers got this descriptor from 12804203530613280281868b3ca36c817530bca3825cJoel Becker * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ 12814203530613280281868b3ca36c817530bca3825cJoel Becker BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); 1282ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1283ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh found = start = best_offset = best_size = 0; 1284ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bitmap = bg->bg_bitmap; 1285ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 12867bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh while((offset = ocfs2_find_next_zero_bit(bitmap, total_bits, start)) != -1) { 12877bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh if (offset == total_bits) 1288ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh break; 1289ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1290ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!ocfs2_test_bg_bit_allocatable(bg_bh, offset)) { 1291ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* We found a zero, but we can't use it as it 1292ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * hasn't been put to disk yet! */ 1293ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh found = 0; 1294ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh start = offset + 1; 1295ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } else if (offset == start) { 1296ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* we found a zero */ 1297ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh found++; 1298ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* move start to the next bit to test */ 1299ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh start++; 1300ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } else { 1301ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* got a zero after some ones */ 1302ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh found = 1; 1303ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh start = offset + 1; 1304ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1305ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (found > best_size) { 1306ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh best_size = found; 1307ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh best_offset = start - found; 1308ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1309ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* we got everything we needed */ 1310ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (found == bits_wanted) { 1311ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* mlog(0, "Found it all!\n"); */ 1312ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh break; 1313ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1314ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1315ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 13167d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker if (best_size) { 13177d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bit_offset = best_offset; 13187d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bits = best_size; 1319ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } else { 1320ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOSPC; 1321ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* No error log here -- see the comment above 1322ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * ocfs2_test_bg_bit_allocatable */ 1323ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1324ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1325ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1326ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1327ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 13281fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fashehstatic inline int ocfs2_block_group_set_bits(handle_t *handle, 1329ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode, 1330ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg, 1331ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh, 1332ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh unsigned int bit_off, 1333ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh unsigned int num_bits) 1334ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1335ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1336ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh void *bitmap = bg->bg_bitmap; 1337ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int journal_type = OCFS2_JOURNAL_ACCESS_WRITE; 1338ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1339ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 1340ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 13414203530613280281868b3ca36c817530bca3825cJoel Becker /* All callers get the descriptor via 13424203530613280281868b3ca36c817530bca3825cJoel Becker * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ 13434203530613280281868b3ca36c817530bca3825cJoel Becker BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); 1344ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(le16_to_cpu(bg->bg_free_bits_count) < num_bits); 1345ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1346ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog(0, "block_group_set_bits: off = %u, num = %u\n", bit_off, 1347ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh num_bits); 1348ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1349ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (ocfs2_is_cluster_bitmap(alloc_inode)) 1350ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh journal_type = OCFS2_JOURNAL_ACCESS_UNDO; 1351ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 135213723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker status = ocfs2_journal_access_gd(handle, 13530cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker INODE_CACHE(alloc_inode), 135413723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker group_bh, 135513723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker journal_type); 1356ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1357ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1358ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1359ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1360ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1361ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le16_add_cpu(&bg->bg_free_bits_count, -num_bits); 1362ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh while(num_bits--) 1363ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_set_bit(bit_off++, bitmap); 1364ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1365ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, group_bh); 1366ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1367ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 1368ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 1369ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1370ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1371ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1372ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* find the one with the most empty bits */ 1373ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline u16 ocfs2_find_victim_chain(struct ocfs2_chain_list *cl) 1374ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1375ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 curr, best; 1376ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1377ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!cl->cl_next_free_rec); 1378ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1379ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh best = curr = 0; 1380ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh while (curr < le16_to_cpu(cl->cl_next_free_rec)) { 1381ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (le32_to_cpu(cl->cl_recs[curr].c_free) > 1382ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(cl->cl_recs[best].c_free)) 1383ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh best = curr; 1384ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh curr++; 1385ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1386ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1387ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(best >= le16_to_cpu(cl->cl_next_free_rec)); 1388ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return best; 1389ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1390ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 13911fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fashehstatic int ocfs2_relink_block_group(handle_t *handle, 1392ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode, 1393ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *fe_bh, 1394ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *bg_bh, 1395ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *prev_bg_bh, 1396ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 chain) 1397ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1398ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1399ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* there is a really tiny chance the journal calls could fail, 1400ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * but we wouldn't want inconsistent blocks in *any* case. */ 1401ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 fe_ptr, bg_ptr, prev_bg_ptr; 1402ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; 1403ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; 1404ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *prev_bg = (struct ocfs2_group_desc *) prev_bg_bh->b_data; 1405ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 14064203530613280281868b3ca36c817530bca3825cJoel Becker /* The caller got these descriptors from 14074203530613280281868b3ca36c817530bca3825cJoel Becker * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ 14084203530613280281868b3ca36c817530bca3825cJoel Becker BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); 14094203530613280281868b3ca36c817530bca3825cJoel Becker BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(prev_bg)); 1410ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1411b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh mlog(0, "Suballoc %llu, chain %u, move group %llu to top, prev = %llu\n", 14121ca1a111b1e6be843c9ce5245dcd570312998d94Mark Fasheh (unsigned long long)le64_to_cpu(fe->i_blkno), chain, 14131ca1a111b1e6be843c9ce5245dcd570312998d94Mark Fasheh (unsigned long long)le64_to_cpu(bg->bg_blkno), 14141ca1a111b1e6be843c9ce5245dcd570312998d94Mark Fasheh (unsigned long long)le64_to_cpu(prev_bg->bg_blkno)); 1415ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1416ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe_ptr = le64_to_cpu(fe->id2.i_chain.cl_recs[chain].c_blkno); 1417ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg_ptr = le64_to_cpu(bg->bg_next_group); 1418ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh prev_bg_ptr = le64_to_cpu(prev_bg->bg_next_group); 1419ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 14200cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), 14210cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker prev_bg_bh, 142213723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker OCFS2_JOURNAL_ACCESS_WRITE); 1423ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1424ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1425ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto out_rollback; 1426ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1427ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1428ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh prev_bg->bg_next_group = bg->bg_next_group; 1429ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, prev_bg_bh); 1430ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 14310cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), 14320cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker bg_bh, OCFS2_JOURNAL_ACCESS_WRITE); 1433ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1434ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1435ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto out_rollback; 1436ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1437ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1438ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_next_group = fe->id2.i_chain.cl_recs[chain].c_blkno; 1439ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, bg_bh); 1440ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 14410cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), 14420cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker fe_bh, OCFS2_JOURNAL_ACCESS_WRITE); 1443ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1444ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1445ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto out_rollback; 1446ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1447ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1448ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe->id2.i_chain.cl_recs[chain].c_blkno = bg->bg_blkno; 1449ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, fe_bh); 1450ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1451ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehout_rollback: 1452ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1453ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe->id2.i_chain.cl_recs[chain].c_blkno = cpu_to_le64(fe_ptr); 1454ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg->bg_next_group = cpu_to_le64(bg_ptr); 1455ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh prev_bg->bg_next_group = cpu_to_le64(prev_bg_ptr); 1456ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 14574203530613280281868b3ca36c817530bca3825cJoel Becker 1458ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 1459ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1460ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1461ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1462ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg, 1463ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 wanted) 1464ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1465ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return le16_to_cpu(bg->bg_free_bits_count) > wanted; 1466ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1467ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1468ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* return 0 on success, -ENOSPC to keep searching and any other < 0 1469ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * value on error. */ 1470ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_cluster_group_search(struct inode *inode, 1471ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh, 1472ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, u32 min_bits, 14731187c968852e3c668f3b9376083851f81f6eee22Joel Becker u64 max_block, 14747d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res) 1475ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1476ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int search = -ENOSPC; 1477ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int ret; 14781187c968852e3c668f3b9376083851f81f6eee22Joel Becker u64 blkoff; 14797bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *) group_bh->b_data; 14809c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 14817bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh unsigned int max_bits, gd_cluster_off; 1482ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1483ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ocfs2_is_cluster_bitmap(inode)); 1484ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 14857bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh if (gd->bg_free_bits_count) { 14867bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh max_bits = le16_to_cpu(gd->bg_bits); 14877bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh 14887bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh /* Tail groups in cluster bitmaps which aren't cpg 14897bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh * aligned are prone to partial extention by a failed 14907bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh * fs resize. If the file system resize never got to 14917bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh * update the dinode cluster count, then we don't want 14927bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh * to trust any clusters past it, regardless of what 14937bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh * the group descriptor says. */ 14947bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh gd_cluster_off = ocfs2_blocks_to_clusters(inode->i_sb, 14957bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh le64_to_cpu(gd->bg_blkno)); 14967bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh if ((gd_cluster_off + max_bits) > 14977bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh OCFS2_I(inode)->ip_clusters) { 14987bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh max_bits = OCFS2_I(inode)->ip_clusters - gd_cluster_off; 14997bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh mlog(0, "Desc %llu, bg_bits %u, clusters %u, use %u\n", 15007bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh (unsigned long long)le64_to_cpu(gd->bg_blkno), 15017bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh le16_to_cpu(gd->bg_bits), 15027bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh OCFS2_I(inode)->ip_clusters, max_bits); 15037bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh } 15047bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh 1505ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ret = ocfs2_block_group_find_clear_bits(OCFS2_SB(inode->i_sb), 1506ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group_bh, bits_wanted, 15077d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker max_bits, res); 1508ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (ret) 1509ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return ret; 1510ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 15111187c968852e3c668f3b9376083851f81f6eee22Joel Becker if (max_block) { 15121187c968852e3c668f3b9376083851f81f6eee22Joel Becker blkoff = ocfs2_clusters_to_blocks(inode->i_sb, 15131187c968852e3c668f3b9376083851f81f6eee22Joel Becker gd_cluster_off + 15147d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bit_offset + 15157d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bits); 15161187c968852e3c668f3b9376083851f81f6eee22Joel Becker mlog(0, "Checking %llu against %llu\n", 15171187c968852e3c668f3b9376083851f81f6eee22Joel Becker (unsigned long long)blkoff, 15181187c968852e3c668f3b9376083851f81f6eee22Joel Becker (unsigned long long)max_block); 15191187c968852e3c668f3b9376083851f81f6eee22Joel Becker if (blkoff > max_block) 15201187c968852e3c668f3b9376083851f81f6eee22Joel Becker return -ENOSPC; 15211187c968852e3c668f3b9376083851f81f6eee22Joel Becker } 15221187c968852e3c668f3b9376083851f81f6eee22Joel Becker 1523ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* ocfs2_block_group_find_clear_bits() might 1524ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * return success, but we still want to return 1525ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * -ENOSPC unless it found the minimum number 1526ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * of bits. */ 15277d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker if (min_bits <= res->sr_bits) 1528ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh search = 0; /* success */ 15297d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker else if (res->sr_bits) { 15309c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh /* 15319c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh * Don't show bits which we'll be returning 15329c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh * for allocation to the local alloc bitmap. 15339c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh */ 15347d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker ocfs2_local_alloc_seen_free_bits(osb, res->sr_bits); 1535ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1536ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1537ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1538ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return search; 1539ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1540ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1541ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_block_group_search(struct inode *inode, 1542ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh, 1543ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, u32 min_bits, 15441187c968852e3c668f3b9376083851f81f6eee22Joel Becker u64 max_block, 15457d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res) 1546ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1547ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int ret = -ENOSPC; 15481187c968852e3c668f3b9376083851f81f6eee22Joel Becker u64 blkoff; 1549ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) group_bh->b_data; 1550ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1551ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(min_bits != 1); 1552ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ocfs2_is_cluster_bitmap(inode)); 1553ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 15541187c968852e3c668f3b9376083851f81f6eee22Joel Becker if (bg->bg_free_bits_count) { 1555ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ret = ocfs2_block_group_find_clear_bits(OCFS2_SB(inode->i_sb), 1556ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group_bh, bits_wanted, 15577bf72edee614e10b8d470c40a326f47bfdd69992Mark Fasheh le16_to_cpu(bg->bg_bits), 15587d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res); 15591187c968852e3c668f3b9376083851f81f6eee22Joel Becker if (!ret && max_block) { 15607d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker blkoff = le64_to_cpu(bg->bg_blkno) + 15617d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bit_offset + res->sr_bits; 15621187c968852e3c668f3b9376083851f81f6eee22Joel Becker mlog(0, "Checking %llu against %llu\n", 15631187c968852e3c668f3b9376083851f81f6eee22Joel Becker (unsigned long long)blkoff, 15641187c968852e3c668f3b9376083851f81f6eee22Joel Becker (unsigned long long)max_block); 15651187c968852e3c668f3b9376083851f81f6eee22Joel Becker if (blkoff > max_block) 15661187c968852e3c668f3b9376083851f81f6eee22Joel Becker ret = -ENOSPC; 15671187c968852e3c668f3b9376083851f81f6eee22Joel Becker } 15681187c968852e3c668f3b9376083851f81f6eee22Joel Becker } 1569ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1570ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return ret; 1571ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1572ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1573883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fashehstatic int ocfs2_alloc_dinode_update_counts(struct inode *inode, 15741fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fasheh handle_t *handle, 1575883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh struct buffer_head *di_bh, 1576883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u32 num_bits, 1577883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u16 chain) 1578883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh{ 1579883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh int ret; 1580883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u32 tmp_used; 1581883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; 1582883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &di->id2.i_chain; 1583883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 15840cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, 158513723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker OCFS2_JOURNAL_ACCESS_WRITE); 1586883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (ret < 0) { 1587883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh mlog_errno(ret); 1588883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh goto out; 1589883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1590883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1591883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh tmp_used = le32_to_cpu(di->id1.bitmap1.i_used); 1592883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh di->id1.bitmap1.i_used = cpu_to_le32(num_bits + tmp_used); 1593883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh le32_add_cpu(&cl->cl_recs[chain].c_free, -num_bits); 1594ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, di_bh); 1595883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1596883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fashehout: 1597883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh return ret; 1598883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh} 1599883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1600ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Beckerstatic int ocfs2_bg_discontig_fix_by_rec(struct ocfs2_suballoc_result *res, 1601ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker struct ocfs2_extent_rec *rec, 1602ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker struct ocfs2_chain_list *cl) 160313e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker{ 160413e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker unsigned int bpc = le16_to_cpu(cl->cl_bpc); 160513e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker unsigned int bitoff = le32_to_cpu(rec->e_cpos) * bpc; 160613e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker unsigned int bitcount = le32_to_cpu(rec->e_leaf_clusters) * bpc; 160713e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 160813e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker if (res->sr_bit_offset < bitoff) 160913e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker return 0; 161013e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker if (res->sr_bit_offset >= (bitoff + bitcount)) 161113e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker return 0; 1612ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker res->sr_blkno = le64_to_cpu(rec->e_blkno) + 1613ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker (res->sr_bit_offset - bitoff); 161413e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker if ((res->sr_bit_offset + res->sr_bits) > (bitoff + bitcount)) 161513e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker res->sr_bits = (bitoff + bitcount) - res->sr_bit_offset; 161613e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker return 1; 161713e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker} 161813e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 1619ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Beckerstatic void ocfs2_bg_discontig_fix_result(struct ocfs2_alloc_context *ac, 1620ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker struct ocfs2_group_desc *bg, 1621ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker struct ocfs2_suballoc_result *res) 162213e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker{ 162313e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker int i; 16242b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker u64 bg_blkno = res->sr_bg_blkno; /* Save off */ 162513e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker struct ocfs2_extent_rec *rec; 162613e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker struct ocfs2_dinode *di = (struct ocfs2_dinode *)ac->ac_bh->b_data; 162713e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker struct ocfs2_chain_list *cl = &di->id2.i_chain; 162813e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 1629ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker if (ocfs2_is_cluster_bitmap(ac->ac_inode)) { 1630ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker res->sr_blkno = 0; 163113e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker return; 1632ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker } 163313e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 1634ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker res->sr_blkno = res->sr_bg_blkno + res->sr_bit_offset; 16352b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker res->sr_bg_blkno = 0; /* Clear it for contig block groups */ 16364711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma if (!ocfs2_supports_discontig_bg(OCFS2_SB(ac->ac_inode->i_sb)) || 1637ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker !bg->bg_list.l_next_free_rec) 163813e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker return; 163913e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 164013e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker for (i = 0; i < le16_to_cpu(bg->bg_list.l_next_free_rec); i++) { 164113e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker rec = &bg->bg_list.l_recs[i]; 16422b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker if (ocfs2_bg_discontig_fix_by_rec(res, rec, cl)) { 16432b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker res->sr_bg_blkno = bg_blkno; /* Restore */ 164413e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker break; 16452b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker } 164613e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker } 164713e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker} 164813e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 1649883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fashehstatic int ocfs2_search_one_group(struct ocfs2_alloc_context *ac, 16501fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fasheh handle_t *handle, 1651883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u32 bits_wanted, 1652883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u32 min_bits, 16537d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res, 1654883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u16 *bits_left) 1655883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh{ 1656883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh int ret; 1657883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh struct buffer_head *group_bh = NULL; 1658883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh struct ocfs2_group_desc *gd; 165968f64d471be38631d7196b938d9809802dd467faJoel Becker struct ocfs2_dinode *di = (struct ocfs2_dinode *)ac->ac_bh->b_data; 1660883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh struct inode *alloc_inode = ac->ac_inode; 1661883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 16627d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker ret = ocfs2_read_group_descriptor(alloc_inode, di, 16637d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bg_blkno, &group_bh); 1664883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (ret < 0) { 1665883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh mlog_errno(ret); 1666883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh return ret; 1667883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1668883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1669883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh gd = (struct ocfs2_group_desc *) group_bh->b_data; 1670883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh ret = ac->ac_group_search(alloc_inode, group_bh, bits_wanted, min_bits, 16717d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker ac->ac_max_block, res); 1672883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (ret < 0) { 1673883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (ret != -ENOSPC) 1674883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh mlog_errno(ret); 1675883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh goto out; 1676883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1677883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 167813e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker if (!ret) 1679ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker ocfs2_bg_discontig_fix_result(ac, gd, res); 168013e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 1681883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh ret = ocfs2_alloc_dinode_update_counts(alloc_inode, handle, ac->ac_bh, 16827d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bits, 1683883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh le16_to_cpu(gd->bg_chain)); 1684883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (ret < 0) { 1685883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh mlog_errno(ret); 1686883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh goto out; 1687883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1688883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1689883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh ret = ocfs2_block_group_set_bits(handle, alloc_inode, gd, group_bh, 16907d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bit_offset, res->sr_bits); 1691883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (ret < 0) 1692883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh mlog_errno(ret); 1693883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1694883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh *bits_left = le16_to_cpu(gd->bg_free_bits_count); 1695883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1696883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fashehout: 1697883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh brelse(group_bh); 1698883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1699883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh return ret; 1700883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh} 1701883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1702ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic int ocfs2_search_chain(struct ocfs2_alloc_context *ac, 17031fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fasheh handle_t *handle, 1704ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, 1705ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 min_bits, 17067d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res, 1707883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u16 *bits_left) 1708ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1709ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 17107d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker u16 chain; 1711ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 tmp_used; 1712ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 next_group; 1713ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *alloc_inode = ac->ac_inode; 1714ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh = NULL; 1715ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *prev_group_bh = NULL; 1716ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe = (struct ocfs2_dinode *) ac->ac_bh->b_data; 1717ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; 1718ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *bg; 1719ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1720ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh chain = ac->ac_chain; 1721b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh mlog(0, "trying to alloc %u bits from chain %u, inode %llu\n", 1722b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh bits_wanted, chain, 1723b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno); 1724ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 172568f64d471be38631d7196b938d9809802dd467faJoel Becker status = ocfs2_read_group_descriptor(alloc_inode, fe, 172668f64d471be38631d7196b938d9809802dd467faJoel Becker le64_to_cpu(cl->cl_recs[chain].c_blkno), 172768f64d471be38631d7196b938d9809802dd467faJoel Becker &group_bh); 1728ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1729ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1730ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1731ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1732ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg = (struct ocfs2_group_desc *) group_bh->b_data; 1733ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1734ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOSPC; 1735ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* for now, the chain search is a bit simplistic. We just use 1736ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * the 1st group with any empty bits. */ 17371187c968852e3c668f3b9376083851f81f6eee22Joel Becker while ((status = ac->ac_group_search(alloc_inode, group_bh, 17381187c968852e3c668f3b9376083851f81f6eee22Joel Becker bits_wanted, min_bits, 17397d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker ac->ac_max_block, 17407d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res)) == -ENOSPC) { 1741ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!bg->bg_next_group) 1742ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh break; 1743a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh 1744a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh brelse(prev_group_bh); 1745a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh prev_group_bh = NULL; 1746a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh 1747ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh next_group = le64_to_cpu(bg->bg_next_group); 1748ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh prev_group_bh = group_bh; 1749ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group_bh = NULL; 175068f64d471be38631d7196b938d9809802dd467faJoel Becker status = ocfs2_read_group_descriptor(alloc_inode, fe, 175168f64d471be38631d7196b938d9809802dd467faJoel Becker next_group, &group_bh); 1752ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1753ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1754ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1755ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1756ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg = (struct ocfs2_group_desc *) group_bh->b_data; 1757ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1758ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1759ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 1760ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1761ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1762ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1763ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1764b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh mlog(0, "alloc succeeds: we give %u bits from block group %llu\n", 17657d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bits, (unsigned long long)le64_to_cpu(bg->bg_blkno)); 1766ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 17677d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bg_blkno = le64_to_cpu(bg->bg_blkno); 1768ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 17697d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker BUG_ON(res->sr_bits == 0); 177013e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker if (!status) 1771ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker ocfs2_bg_discontig_fix_result(ac, bg, res); 177213e434cf0cacd2f03a7f4cd077e3e995ef5ef710Joel Becker 1773ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1774ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* 1775ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * Keep track of previous block descriptor read. When 1776ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * we find a target, if we have read more than X 1777ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * number of descriptors, and the target is reasonably 1778ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * empty, relink him to top of his chain. 1779ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 1780ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * We've read 0 extra blocks and only send one more to 1781ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * the transaction, yet the next guy to search has a 1782ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * much easier time. 1783ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * 1784ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * Do this *after* figuring out how many bits we're taking out 1785ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * of our target group. 1786ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh */ 1787ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (ac->ac_allow_chain_relink && 1788ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (prev_group_bh) && 17897d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker (ocfs2_block_group_reasonably_empty(bg, res->sr_bits))) { 1790ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = ocfs2_relink_block_group(handle, alloc_inode, 1791ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_bh, group_bh, 1792ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh prev_group_bh, chain); 1793ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1794ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1795ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1796ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1797ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1798ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1799ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* Ok, claim our bits now: set the info on dinode, chainlist 1800ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * and then the group */ 180113723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker status = ocfs2_journal_access_di(handle, 18020cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker INODE_CACHE(alloc_inode), 180313723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker ac->ac_bh, 180413723d00e374c2a6d6ccb5af6de965e89c3e1b01Joel Becker OCFS2_JOURNAL_ACCESS_WRITE); 1805ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1806ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1807ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1808ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1809ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1810ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh tmp_used = le32_to_cpu(fe->id1.bitmap1.i_used); 18117d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker fe->id1.bitmap1.i_used = cpu_to_le32(res->sr_bits + tmp_used); 18127d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker le32_add_cpu(&cl->cl_recs[chain].c_free, -res->sr_bits); 1813ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, ac->ac_bh); 1814ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1815ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = ocfs2_block_group_set_bits(handle, 1816ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh alloc_inode, 1817ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bg, 1818ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group_bh, 18197d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bit_offset, 18207d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bits); 1821ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1822ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1823ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1824ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1825ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 18267d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker mlog(0, "Allocated %u bits from suballocator %llu\n", res->sr_bits, 18271ca1a111b1e6be843c9ce5245dcd570312998d94Mark Fasheh (unsigned long long)le64_to_cpu(fe->i_blkno)); 1828ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1829883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh *bits_left = le16_to_cpu(bg->bg_free_bits_count); 1830ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 1831a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh brelse(group_bh); 1832a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh brelse(prev_group_bh); 1833ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1834ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 1835ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1836ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1837ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1838ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* will give out up to bits_wanted contiguous bits. */ 1839aa8f8e93c898a0319bcd6c79a9a42fe52abac7d7Joel Beckerstatic int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *ac, 18401fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fasheh handle_t *handle, 1841ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, 1842ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 min_bits, 18437d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker struct ocfs2_suballoc_result *res) 1844ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1845ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1846ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 victim, i; 1847883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh u16 bits_left = 0; 1848ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_chain_list *cl; 1849ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe; 1850ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1851ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 1852ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1853ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_bits_given >= ac->ac_bits_wanted); 1854ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(bits_wanted > (ac->ac_bits_wanted - ac->ac_bits_given)); 1855ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ac->ac_bh); 1856ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1857ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe = (struct ocfs2_dinode *) ac->ac_bh->b_data; 185810995aa2451afa20b721cc7de856cae1a13dba57Joel Becker 185910995aa2451afa20b721cc7de856cae1a13dba57Joel Becker /* The bh was validated by the inode read during 186010995aa2451afa20b721cc7de856cae1a13dba57Joel Becker * ocfs2_reserve_suballoc_bits(). Any corruption is a code bug. */ 186110995aa2451afa20b721cc7de856cae1a13dba57Joel Becker BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); 186210995aa2451afa20b721cc7de856cae1a13dba57Joel Becker 1863ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (le32_to_cpu(fe->id1.bitmap1.i_used) >= 1864ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->id1.bitmap1.i_total)) { 1865aa8f8e93c898a0319bcd6c79a9a42fe52abac7d7Joel Becker ocfs2_error(ac->ac_inode->i_sb, 1866aa8f8e93c898a0319bcd6c79a9a42fe52abac7d7Joel Becker "Chain allocator dinode %llu has %u used " 1867b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh "bits but only %u total.", 1868b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)le64_to_cpu(fe->i_blkno), 1869ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->id1.bitmap1.i_used), 1870ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->id1.bitmap1.i_total)); 1871ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -EIO; 1872ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1873ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1874ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 18757d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res->sr_bg_blkno = ac->ac_last_group; 18767d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker if (res->sr_bg_blkno) { 1877883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh /* Attempt to short-circuit the usual search mechanism 1878883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh * by jumping straight to the most recently used 1879883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh * allocation group. This helps us mantain some 1880883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh * contiguousness across allocations. */ 1881da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh status = ocfs2_search_one_group(ac, handle, bits_wanted, 18827d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker min_bits, res, &bits_left); 18837d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker if (!status) 1884883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh goto set_hint; 1885883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (status < 0 && status != -ENOSPC) { 1886883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh mlog_errno(status); 1887883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh goto bail; 1888883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1889883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1890883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1891ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; 1892ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1893ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh victim = ocfs2_find_victim_chain(cl); 1894ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_chain = victim; 1895ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_allow_chain_relink = 1; 1896ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 18977d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker status = ocfs2_search_chain(ac, handle, bits_wanted, min_bits, 18987d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res, &bits_left); 1899ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!status) 1900883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh goto set_hint; 1901ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0 && status != -ENOSPC) { 1902ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1903ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1904ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1905ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1906ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog(0, "Search of victim chain %u came up with nothing, " 1907ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh "trying all chains now.\n", victim); 1908ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1909ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* If we didn't pick a good victim, then just default to 1910ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * searching each chain in order. Don't allow chain relinking 1911ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * because we only calculate enough journal credits for one 1912ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * relink per alloc. */ 1913ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_allow_chain_relink = 0; 1914ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i ++) { 1915ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (i == victim) 1916ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh continue; 1917ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!cl->cl_recs[i].c_free) 1918ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh continue; 1919ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1920ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_chain = i; 1921da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh status = ocfs2_search_chain(ac, handle, bits_wanted, min_bits, 19227d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res, &bits_left); 1923ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!status) 1924ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh break; 1925ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0 && status != -ENOSPC) { 1926ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1927ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1928ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1929ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 1930ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1931883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fashehset_hint: 1932883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (status != -ENOSPC) { 1933883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh /* If the next search of this group is not likely to 1934883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh * yield a suitable extent, then we reset the last 1935883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh * group hint so as to not waste a disk read */ 1936883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh if (bits_left < min_bits) 1937883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh ac->ac_last_group = 0; 1938883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh else 19397d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker ac->ac_last_group = res->sr_bg_blkno; 1940883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh } 1941883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fasheh 1942883d4cae4a2b01a05193cf2665c77b7489a8b6a0Mark Fashehbail: 1943ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 1944ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1945ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1946ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 19471ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Beckerint ocfs2_claim_metadata(handle_t *handle, 1948ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_alloc_context *ac, 1949ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 bits_wanted, 19502b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker u64 *suballoc_loc, 1951ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 *suballoc_bit_start, 1952ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh unsigned int *num_bits, 1953ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 *blkno_start) 1954ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 1955ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 1956ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker struct ocfs2_suballoc_result res = { .sr_blkno = 0, }; 1957ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1958ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ac); 1959ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_bits_wanted < (ac->ac_bits_given + bits_wanted)); 1960ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_which != OCFS2_AC_USE_META); 1961ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1962aa8f8e93c898a0319bcd6c79a9a42fe52abac7d7Joel Becker status = ocfs2_claim_suballoc_bits(ac, 1963da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh handle, 1964ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bits_wanted, 1965ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1, 19667d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker &res); 1967ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 1968ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 1969ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 1970ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 19711ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Becker atomic_inc(&OCFS2_SB(ac->ac_inode->i_sb)->alloc_stats.bg_allocs); 1972ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 19732b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker *suballoc_loc = res.sr_bg_blkno; 19747d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker *suballoc_bit_start = res.sr_bit_offset; 1975ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker *blkno_start = res.sr_blkno; 19767d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker ac->ac_bits_given += res.sr_bits; 19777d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker *num_bits = res.sr_bits; 1978ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = 0; 1979ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 1980ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 1981ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 1982ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 1983ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1984138211515c102807a16c02fdc15feef1f6ef8124Tao Mastatic void ocfs2_init_inode_ac_group(struct inode *dir, 1985138211515c102807a16c02fdc15feef1f6ef8124Tao Ma struct buffer_head *parent_fe_bh, 1986138211515c102807a16c02fdc15feef1f6ef8124Tao Ma struct ocfs2_alloc_context *ac) 1987138211515c102807a16c02fdc15feef1f6ef8124Tao Ma{ 1988138211515c102807a16c02fdc15feef1f6ef8124Tao Ma struct ocfs2_dinode *fe = (struct ocfs2_dinode *)parent_fe_bh->b_data; 1989138211515c102807a16c02fdc15feef1f6ef8124Tao Ma /* 1990138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * Try to allocate inodes from some specific group. 1991138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * 1992138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * If the parent dir has recorded the last group used in allocation, 1993138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * cool, use it. Otherwise if we try to allocate new inode from the 1994138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * same slot the parent dir belongs to, use the same chunk. 1995138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * 1996138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * We are very careful here to avoid the mistake of setting 1997138211515c102807a16c02fdc15feef1f6ef8124Tao Ma * ac_last_group to a group descriptor from a different (unlocked) slot. 1998138211515c102807a16c02fdc15feef1f6ef8124Tao Ma */ 1999138211515c102807a16c02fdc15feef1f6ef8124Tao Ma if (OCFS2_I(dir)->ip_last_used_group && 2000138211515c102807a16c02fdc15feef1f6ef8124Tao Ma OCFS2_I(dir)->ip_last_used_slot == ac->ac_alloc_slot) 2001138211515c102807a16c02fdc15feef1f6ef8124Tao Ma ac->ac_last_group = OCFS2_I(dir)->ip_last_used_group; 2002138211515c102807a16c02fdc15feef1f6ef8124Tao Ma else if (le16_to_cpu(fe->i_suballoc_slot) == ac->ac_alloc_slot) 2003138211515c102807a16c02fdc15feef1f6ef8124Tao Ma ac->ac_last_group = ocfs2_which_suballoc_group( 2004138211515c102807a16c02fdc15feef1f6ef8124Tao Ma le64_to_cpu(fe->i_blkno), 2005138211515c102807a16c02fdc15feef1f6ef8124Tao Ma le16_to_cpu(fe->i_suballoc_bit)); 2006138211515c102807a16c02fdc15feef1f6ef8124Tao Ma} 2007138211515c102807a16c02fdc15feef1f6ef8124Tao Ma 2008138211515c102807a16c02fdc15feef1f6ef8124Tao Mastatic inline void ocfs2_save_inode_ac_group(struct inode *dir, 2009138211515c102807a16c02fdc15feef1f6ef8124Tao Ma struct ocfs2_alloc_context *ac) 2010138211515c102807a16c02fdc15feef1f6ef8124Tao Ma{ 2011138211515c102807a16c02fdc15feef1f6ef8124Tao Ma OCFS2_I(dir)->ip_last_used_group = ac->ac_last_group; 2012138211515c102807a16c02fdc15feef1f6ef8124Tao Ma OCFS2_I(dir)->ip_last_used_slot = ac->ac_alloc_slot; 2013138211515c102807a16c02fdc15feef1f6ef8124Tao Ma} 2014138211515c102807a16c02fdc15feef1f6ef8124Tao Ma 20151ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Beckerint ocfs2_claim_new_inode(handle_t *handle, 2016138211515c102807a16c02fdc15feef1f6ef8124Tao Ma struct inode *dir, 2017138211515c102807a16c02fdc15feef1f6ef8124Tao Ma struct buffer_head *parent_fe_bh, 2018ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_alloc_context *ac, 20192b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker u64 *suballoc_loc, 2020ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 *suballoc_bit, 2021ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 *fe_blkno) 2022ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2023ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 20242b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker struct ocfs2_suballoc_result res; 2025ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2026ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 2027ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2028ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ac); 2029ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_bits_given != 0); 2030ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_bits_wanted != 1); 2031ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_which != OCFS2_AC_USE_INODE); 2032ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2033138211515c102807a16c02fdc15feef1f6ef8124Tao Ma ocfs2_init_inode_ac_group(dir, parent_fe_bh, ac); 2034138211515c102807a16c02fdc15feef1f6ef8124Tao Ma 2035aa8f8e93c898a0319bcd6c79a9a42fe52abac7d7Joel Becker status = ocfs2_claim_suballoc_bits(ac, 2036da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh handle, 2037ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1, 2038ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 1, 20397d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker &res); 2040ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 2041ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 2042ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 2043ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 20441ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Becker atomic_inc(&OCFS2_SB(ac->ac_inode->i_sb)->alloc_stats.bg_allocs); 2045ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 20467d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker BUG_ON(res.sr_bits != 1); 2047ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 20482b6cb576aa80611f1f6a3c88708d1e68a8d97985Joel Becker *suballoc_loc = res.sr_bg_blkno; 20497d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker *suballoc_bit = res.sr_bit_offset; 2050ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker *fe_blkno = res.sr_blkno; 2051ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac->ac_bits_given++; 2052138211515c102807a16c02fdc15feef1f6ef8124Tao Ma ocfs2_save_inode_ac_group(dir, ac); 2053ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = 0; 2054ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 2055ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 2056ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 2057ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2058ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2059ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* translate a group desc. blkno and it's bitmap offset into 2060ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * disk cluster offset. */ 2061ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline u32 ocfs2_desc_bitmap_to_cluster_off(struct inode *inode, 2062ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 bg_blkno, 2063ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 bg_bit_off) 2064ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2065ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 2066ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 cluster = 0; 2067ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2068ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ocfs2_is_cluster_bitmap(inode)); 2069ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2070ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (bg_blkno != osb->first_cluster_group_blkno) 2071ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh cluster = ocfs2_blocks_to_clusters(inode->i_sb, bg_blkno); 2072ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh cluster += (u32) bg_bit_off; 2073ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return cluster; 2074ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2075ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2076ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* given a cluster offset, calculate which block group it belongs to 2077ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * and return that block offset. */ 2078d659072f736837e56b6433d58e5315ad1d4d5ccfTao Mau64 ocfs2_which_cluster_group(struct inode *inode, u32 cluster) 2079ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2080ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 2081ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 group_no; 2082ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2083ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ocfs2_is_cluster_bitmap(inode)); 2084ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2085ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group_no = cluster / osb->bitmap_cpg; 2086ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!group_no) 2087ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return osb->first_cluster_group_blkno; 2088ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return ocfs2_clusters_to_blocks(inode->i_sb, 2089ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group_no * osb->bitmap_cpg); 2090ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2091ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2092ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* given the block number of a cluster start, calculate which cluster 2093ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * group and descriptor bitmap offset that corresponds to. */ 2094ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline void ocfs2_block_to_cluster_group(struct inode *inode, 2095ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 data_blkno, 2096ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 *bg_blkno, 2097ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 *bg_bit_off) 2098ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2099ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 2100ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 data_cluster = ocfs2_blocks_to_clusters(osb->sb, data_blkno); 2101ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2102ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(!ocfs2_is_cluster_bitmap(inode)); 2103ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2104ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *bg_blkno = ocfs2_which_cluster_group(inode, 2105ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh data_cluster); 2106ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2107ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (*bg_blkno == osb->first_cluster_group_blkno) 2108ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *bg_bit_off = (u16) data_cluster; 2109ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh else 2110ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *bg_bit_off = (u16) ocfs2_blocks_to_clusters(osb->sb, 2111ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh data_blkno - *bg_blkno); 2112ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2113ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2114ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* 2115ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * min_bits - minimum contiguous chunk from this total allocation we 2116ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * can handle. set to what we asked for originally for a full 2117ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * contig. allocation, set to '1' to indicate we can deal with extents 2118ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * of any size. 2119ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh */ 21201ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Beckerint __ocfs2_claim_clusters(handle_t *handle, 2121415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh struct ocfs2_alloc_context *ac, 2122415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 min_clusters, 2123415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 max_clusters, 2124415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 *cluster_start, 2125415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 *num_clusters) 2126ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2127ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 2128415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh unsigned int bits_wanted = max_clusters; 2129ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker struct ocfs2_suballoc_result res = { .sr_blkno = 0, }; 21301ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Becker struct ocfs2_super *osb = OCFS2_SB(ac->ac_inode->i_sb); 2131ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2132ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 2133ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2134ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_bits_given >= ac->ac_bits_wanted); 2135ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2136ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(ac->ac_which != OCFS2_AC_USE_LOCAL 2137ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh && ac->ac_which != OCFS2_AC_USE_MAIN); 2138ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2139ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (ac->ac_which == OCFS2_AC_USE_LOCAL) { 214033d5d380d667ad264675cfdb297dfc3c5b6542ccMark Fasheh WARN_ON(min_clusters > 1); 214133d5d380d667ad264675cfdb297dfc3c5b6542ccMark Fasheh 2142ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = ocfs2_claim_local_alloc_bits(osb, 2143ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh handle, 2144ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ac, 2145ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bits_wanted, 2146ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh cluster_start, 2147ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh num_clusters); 2148ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!status) 2149ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh atomic_inc(&osb->alloc_stats.local_data); 2150ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } else { 2151ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (min_clusters > (osb->bitmap_cpg - 1)) { 2152ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* The only paths asking for contiguousness 2153ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * should know about this already. */ 21542fbe8d1ebe004425b4f7b8bba345623d2280be82Sunil Mushran mlog(ML_ERROR, "minimum allocation requested %u exceeds " 21552fbe8d1ebe004425b4f7b8bba345623d2280be82Sunil Mushran "group bitmap size %u!\n", min_clusters, 21562fbe8d1ebe004425b4f7b8bba345623d2280be82Sunil Mushran osb->bitmap_cpg); 2157ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = -ENOSPC; 2158ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 2159ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2160ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* clamp the current request down to a realistic size. */ 2161ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (bits_wanted > (osb->bitmap_cpg - 1)) 2162ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bits_wanted = osb->bitmap_cpg - 1; 2163ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2164aa8f8e93c898a0319bcd6c79a9a42fe52abac7d7Joel Becker status = ocfs2_claim_suballoc_bits(ac, 2165da5cbf2f9df922cfdafa39351691fa83517f1e25Mark Fasheh handle, 2166ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh bits_wanted, 2167ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh min_clusters, 21687d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker &res); 2169ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (!status) { 2170ba2066351b630f0205ebf725f5c81a2a07a77cd7Joel Becker BUG_ON(res.sr_blkno); /* cluster alloc can't set */ 2171ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh *cluster_start = 2172ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_desc_bitmap_to_cluster_off(ac->ac_inode, 21737d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res.sr_bg_blkno, 21747d1fe093bf04124dcc50c5dde1765bd098464bfaJoel Becker res.sr_bit_offset); 2175ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh atomic_inc(&osb->alloc_stats.bitmap_data); 21764711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma *num_clusters = res.sr_bits; 2177ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2178ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2179ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 2180ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status != -ENOSPC) 2181ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 2182ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 2183ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2184ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 21854711954eaa8d30f653fda238cecf919f1ae40d6fTao Ma ac->ac_bits_given += *num_clusters; 2186ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2187ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 2188ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 2189ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 2190ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2191ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 21921ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Beckerint ocfs2_claim_clusters(handle_t *handle, 2193415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh struct ocfs2_alloc_context *ac, 2194415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 min_clusters, 2195415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 *cluster_start, 2196415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh u32 *num_clusters) 2197415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh{ 2198415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh unsigned int bits_wanted = ac->ac_bits_wanted - ac->ac_bits_given; 2199415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh 22001ed9b777f77929ae961d6f9cdf828a07200ba71cJoel Becker return __ocfs2_claim_clusters(handle, ac, min_clusters, 2201415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh bits_wanted, cluster_start, num_clusters); 2202415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh} 2203415cb800375cc4e89fb5a6a454e484bd4adbffb4Mark Fasheh 2204b4414eea0e7b9c134262c801a87e338bf675962cMark Fashehstatic int ocfs2_block_group_clear_bits(handle_t *handle, 2205b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct inode *alloc_inode, 2206b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct ocfs2_group_desc *bg, 2207b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct buffer_head *group_bh, 2208b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int bit_off, 2209b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int num_bits, 2210b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh void (*undo_fn)(unsigned int bit, 2211b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned long *bmap)) 2212ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2213ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 2214ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh unsigned int tmp; 2215ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *undo_bg = NULL; 2216ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2217ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 2218ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 22194203530613280281868b3ca36c817530bca3825cJoel Becker /* The caller got this descriptor from 22204203530613280281868b3ca36c817530bca3825cJoel Becker * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ 22214203530613280281868b3ca36c817530bca3825cJoel Becker BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); 2222ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2223ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog(0, "off = %u, num = %u\n", bit_off, num_bits); 2224ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2225b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh BUG_ON(undo_fn && !ocfs2_is_cluster_bitmap(alloc_inode)); 22260cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), 2227b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh group_bh, 2228b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh undo_fn ? 2229b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh OCFS2_JOURNAL_ACCESS_UNDO : 2230b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh OCFS2_JOURNAL_ACCESS_WRITE); 2231ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 2232ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 2233ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 2234ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2235ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2236b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh if (undo_fn) { 223794e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran jbd_lock_bh_state(group_bh); 223894e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran undo_bg = (struct ocfs2_group_desc *) 223994e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran bh2jh(group_bh)->b_committed_data; 224094e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran BUG_ON(!undo_bg); 224194e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran } 2242ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2243ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh tmp = num_bits; 2244ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh while(tmp--) { 2245ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_clear_bit((bit_off + tmp), 2246ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh (unsigned long *) bg->bg_bitmap); 2247b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh if (undo_fn) 2248b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh undo_fn(bit_off + tmp, 2249b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh (unsigned long *) undo_bg->bg_bitmap); 2250ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2251ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le16_add_cpu(&bg->bg_free_bits_count, num_bits); 2252ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2253b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh if (undo_fn) 225494e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran jbd_unlock_bh_state(group_bh); 225594e41ecfe0f202df948fdbb19a53308a58cf2184Sunil Mushran 2256ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, group_bh); 2257ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 2258ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 2259ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2260ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2261ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh/* 2262ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * expects the suballoc inode to already be locked. 2263ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh */ 2264b4414eea0e7b9c134262c801a87e338bf675962cMark Fashehstatic int _ocfs2_free_suballoc_bits(handle_t *handle, 2265b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct inode *alloc_inode, 2266b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct buffer_head *alloc_bh, 2267b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int start_bit, 2268b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh u64 bg_blkno, 2269b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int count, 2270b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh void (*undo_fn)(unsigned int bit, 2271b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned long *bitmap)) 2272ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2273ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status = 0; 2274ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u32 tmp_used; 2275ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe = (struct ocfs2_dinode *) alloc_bh->b_data; 2276ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_chain_list *cl = &fe->id2.i_chain; 2277ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *group_bh = NULL; 2278ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_group_desc *group; 2279ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2280ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 2281ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 228210995aa2451afa20b721cc7de856cae1a13dba57Joel Becker /* The alloc_bh comes from ocfs2_free_dinode() or 228310995aa2451afa20b721cc7de856cae1a13dba57Joel Becker * ocfs2_free_clusters(). The callers have all locked the 228410995aa2451afa20b721cc7de856cae1a13dba57Joel Becker * allocator and gotten alloc_bh from the lock call. This 228510995aa2451afa20b721cc7de856cae1a13dba57Joel Becker * validates the dinode buffer. Any corruption that has happended 228610995aa2451afa20b721cc7de856cae1a13dba57Joel Becker * is a code bug. */ 228710995aa2451afa20b721cc7de856cae1a13dba57Joel Becker BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); 2288ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON((count + start_bit) > ocfs2_bits_per_group(cl)); 2289ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2290b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh mlog(0, "%llu: freeing %u bits from group %llu, starting at %u\n", 2291b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno, count, 2292b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)bg_blkno, start_bit); 2293ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 229468f64d471be38631d7196b938d9809802dd467faJoel Becker status = ocfs2_read_group_descriptor(alloc_inode, fe, bg_blkno, 229568f64d471be38631d7196b938d9809802dd467faJoel Becker &group_bh); 2296ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 2297ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 2298ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 2299ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2300ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group = (struct ocfs2_group_desc *) group_bh->b_data; 230168f64d471be38631d7196b938d9809802dd467faJoel Becker 2302ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON((count + start_bit) > le16_to_cpu(group->bg_bits)); 2303ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2304ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh status = ocfs2_block_group_clear_bits(handle, alloc_inode, 2305ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh group, group_bh, 2306b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh start_bit, count, undo_fn); 2307ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 2308ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 2309ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 2310ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2311ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 23120cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), 23130cf2f7632b1789b811ab20b611c4156e6de2b055Joel Becker alloc_bh, OCFS2_JOURNAL_ACCESS_WRITE); 2314ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh if (status < 0) { 2315ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 2316ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh goto bail; 2317ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2318ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2319ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_add_cpu(&cl->cl_recs[le16_to_cpu(group->bg_chain)].c_free, 2320ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh count); 2321ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh tmp_used = le32_to_cpu(fe->id1.bitmap1.i_used); 2322ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe->id1.bitmap1.i_used = cpu_to_le32(tmp_used - count); 2323ec20cec7a351584ca6c70ead012e73d61f9a8e04Joel Becker ocfs2_journal_dirty(handle, alloc_bh); 2324ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2325ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehbail: 2326a81cb88b64a479b78c6dd5666678d50171865db8Mark Fasheh brelse(group_bh); 2327ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2328ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 2329ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 2330ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2331ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2332b4414eea0e7b9c134262c801a87e338bf675962cMark Fashehint ocfs2_free_suballoc_bits(handle_t *handle, 2333b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct inode *alloc_inode, 2334b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct buffer_head *alloc_bh, 2335b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int start_bit, 2336b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh u64 bg_blkno, 2337b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int count) 2338b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh{ 2339b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh return _ocfs2_free_suballoc_bits(handle, alloc_inode, alloc_bh, 2340b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh start_bit, bg_blkno, count, NULL); 2341b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh} 2342b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh 23431fabe1481fac9e01bf8bffa60a2307ef379aa5deMark Fashehint ocfs2_free_dinode(handle_t *handle, 2344ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct inode *inode_alloc_inode, 2345ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct buffer_head *inode_alloc_bh, 2346ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *di) 2347ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2348ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 blk = le64_to_cpu(di->i_blkno); 2349ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 bit = le16_to_cpu(di->i_suballoc_bit); 2350ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 bg_blkno = ocfs2_which_suballoc_group(blk, bit); 2351ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2352ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return ocfs2_free_suballoc_bits(handle, inode_alloc_inode, 2353ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh inode_alloc_bh, bit, bg_blkno, 1); 2354ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2355ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2356b4414eea0e7b9c134262c801a87e338bf675962cMark Fashehstatic int _ocfs2_free_clusters(handle_t *handle, 2357b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct inode *bitmap_inode, 2358b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct buffer_head *bitmap_bh, 2359b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh u64 start_blk, 2360b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int num_clusters, 2361b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh void (*undo_fn)(unsigned int bit, 2362b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned long *bitmap)) 2363ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2364ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int status; 2365ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u16 bg_start_bit; 2366ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh u64 bg_blkno; 2367ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh struct ocfs2_dinode *fe; 2368ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2369ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* You can't ever have a contiguous set of clusters 2370ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * bigger than a block group bitmap so we never have to worry 2371ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * about looping on them. */ 2372ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2373ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_entry_void(); 2374ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2375ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh /* This is expensive. We can safely remove once this stuff has 2376ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh * gotten tested really well. */ 2377ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh BUG_ON(start_blk != ocfs2_clusters_to_blocks(bitmap_inode->i_sb, ocfs2_blocks_to_clusters(bitmap_inode->i_sb, start_blk))); 2378ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2379ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe = (struct ocfs2_dinode *) bitmap_bh->b_data; 2380ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2381ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh ocfs2_block_to_cluster_group(bitmap_inode, start_blk, &bg_blkno, 2382ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh &bg_start_bit); 2383ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2384b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh mlog(0, "want to free %u clusters starting at block %llu\n", 2385b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh num_clusters, (unsigned long long)start_blk); 2386b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh mlog(0, "bg_blkno = %llu, bg_start_bit = %u\n", 2387b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)bg_blkno, bg_start_bit); 2388ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2389b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh status = _ocfs2_free_suballoc_bits(handle, bitmap_inode, bitmap_bh, 2390b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh bg_start_bit, bg_blkno, 2391b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh num_clusters, undo_fn); 23929c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh if (status < 0) { 2393ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_errno(status); 23949c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh goto out; 23959c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh } 23969c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh 23979c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh ocfs2_local_alloc_seen_free_bits(OCFS2_SB(bitmap_inode->i_sb), 23989c7af40b210e87f8fddd97b0badc0a352862234aMark Fasheh num_clusters); 2399ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 24009c7af40b210e87f8fddd97b0badc0a352862234aMark Fashehout: 2401ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh mlog_exit(status); 2402ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh return status; 2403ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2404ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2405b4414eea0e7b9c134262c801a87e338bf675962cMark Fashehint ocfs2_free_clusters(handle_t *handle, 2406b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct inode *bitmap_inode, 2407b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct buffer_head *bitmap_bh, 2408b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh u64 start_blk, 2409b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int num_clusters) 2410b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh{ 2411b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh return _ocfs2_free_clusters(handle, bitmap_inode, bitmap_bh, 2412b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh start_blk, num_clusters, 2413b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh _ocfs2_set_bit); 2414b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh} 2415b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh 2416b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh/* 2417b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh * Give never-used clusters back to the global bitmap. We don't need 2418b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh * to protect these bits in the undo buffer. 2419b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh */ 2420b4414eea0e7b9c134262c801a87e338bf675962cMark Fashehint ocfs2_release_clusters(handle_t *handle, 2421b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct inode *bitmap_inode, 2422b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh struct buffer_head *bitmap_bh, 2423b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh u64 start_blk, 2424b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh unsigned int num_clusters) 2425b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh{ 2426b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh return _ocfs2_free_clusters(handle, bitmap_inode, bitmap_bh, 2427b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh start_blk, num_clusters, 2428b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh _ocfs2_clear_bit); 2429b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh} 2430b4414eea0e7b9c134262c801a87e338bf675962cMark Fasheh 2431ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline void ocfs2_debug_bg(struct ocfs2_group_desc *bg) 2432ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2433ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("Block Group:\n"); 2434ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("bg_signature: %s\n", bg->bg_signature); 2435ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("bg_size: %u\n", bg->bg_size); 2436ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("bg_bits: %u\n", bg->bg_bits); 2437ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("bg_free_bits_count: %u\n", bg->bg_free_bits_count); 2438ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("bg_chain: %u\n", bg->bg_chain); 2439ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("bg_generation: %u\n", le32_to_cpu(bg->bg_generation)); 2440b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh printk("bg_next_group: %llu\n", 2441b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)bg->bg_next_group); 2442b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh printk("bg_parent_dinode: %llu\n", 2443b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)bg->bg_parent_dinode); 2444b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh printk("bg_blkno: %llu\n", 2445b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)bg->bg_blkno); 2446ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2447ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2448ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fashehstatic inline void ocfs2_debug_suballoc_inode(struct ocfs2_dinode *fe) 2449ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh{ 2450ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh int i; 2451ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh 2452b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh printk("Suballoc Inode %llu:\n", (unsigned long long)fe->i_blkno); 2453ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("i_signature: %s\n", fe->i_signature); 2454b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh printk("i_size: %llu\n", 2455b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)fe->i_size); 2456ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("i_clusters: %u\n", fe->i_clusters); 2457ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("i_generation: %u\n", 2458ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->i_generation)); 2459ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("id1.bitmap1.i_used: %u\n", 2460ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->id1.bitmap1.i_used)); 2461ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("id1.bitmap1.i_total: %u\n", 2462ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh le32_to_cpu(fe->id1.bitmap1.i_total)); 2463ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("id2.i_chain.cl_cpg: %u\n", fe->id2.i_chain.cl_cpg); 2464ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("id2.i_chain.cl_bpc: %u\n", fe->id2.i_chain.cl_bpc); 2465ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("id2.i_chain.cl_count: %u\n", fe->id2.i_chain.cl_count); 2466ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("id2.i_chain.cl_next_free_rec: %u\n", 2467ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe->id2.i_chain.cl_next_free_rec); 2468ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh for(i = 0; i < fe->id2.i_chain.cl_next_free_rec; i++) { 2469ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("fe->id2.i_chain.cl_recs[%d].c_free: %u\n", i, 2470ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe->id2.i_chain.cl_recs[i].c_free); 2471ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh printk("fe->id2.i_chain.cl_recs[%d].c_total: %u\n", i, 2472ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh fe->id2.i_chain.cl_recs[i].c_total); 2473b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh printk("fe->id2.i_chain.cl_recs[%d].c_blkno: %llu\n", i, 2474b0697053f9e8de9cea3d510d9e290851ece9460bMark Fasheh (unsigned long long)fe->id2.i_chain.cl_recs[i].c_blkno); 2475ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh } 2476ccd979bdbce9fba8412beb3f1de68a9d0171b12cMark Fasheh} 2477e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2478e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma/* 2479e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * For a given allocation, determine which allocators will need to be 2480e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * accessed, and lock them, reserving the appropriate number of bits. 2481e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * 2482e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * Sparse file systems call this from ocfs2_write_begin_nolock() 2483e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * and ocfs2_allocate_unwritten_extents(). 2484e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * 2485e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * File systems which don't support holes call this from 2486e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * ocfs2_extend_allocation(). 2487e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma */ 2488f99b9b7ccf6a691f653cec45f36bfdd1e94769c7Joel Beckerint ocfs2_lock_allocators(struct inode *inode, 2489f99b9b7ccf6a691f653cec45f36bfdd1e94769c7Joel Becker struct ocfs2_extent_tree *et, 2490e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma u32 clusters_to_add, u32 extents_to_split, 2491e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma struct ocfs2_alloc_context **data_ac, 2492f99b9b7ccf6a691f653cec45f36bfdd1e94769c7Joel Becker struct ocfs2_alloc_context **meta_ac) 2493e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma{ 2494e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma int ret = 0, num_free_extents; 2495e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma unsigned int max_recs_needed = clusters_to_add + 2 * extents_to_split; 2496e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 2497e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2498e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma *meta_ac = NULL; 2499e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (data_ac) 2500e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma *data_ac = NULL; 2501e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2502e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma BUG_ON(clusters_to_add != 0 && data_ac == NULL); 2503e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 25043d03a305ded8057155bd3c801e64ffef9f534827Joel Becker num_free_extents = ocfs2_num_free_extents(osb, et); 2505e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (num_free_extents < 0) { 2506e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma ret = num_free_extents; 2507e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma mlog_errno(ret); 2508e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma goto out; 2509e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma } 2510e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2511e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma /* 2512e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * Sparse allocation file systems need to be more conservative 2513e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * with reserving room for expansion - the actual allocation 2514e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * happens while we've got a journal handle open so re-taking 2515e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * a cluster lock (because we ran out of room for another 2516e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * extent) will violate ordering rules. 2517e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * 2518e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * Most of the time we'll only be seeing this 1 cluster at a time 2519e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * anyway. 2520e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * 2521e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * Always lock for any unwritten extents - we might want to 2522e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * add blocks during a split. 2523e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma */ 2524e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (!num_free_extents || 2525e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma (ocfs2_sparse_alloc(osb) && num_free_extents < max_recs_needed)) { 2526f99b9b7ccf6a691f653cec45f36bfdd1e94769c7Joel Becker ret = ocfs2_reserve_new_metadata(osb, et->et_root_el, meta_ac); 2527e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (ret < 0) { 2528e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (ret != -ENOSPC) 2529e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma mlog_errno(ret); 2530e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma goto out; 2531e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma } 2532e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma } 2533e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2534e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (clusters_to_add == 0) 2535e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma goto out; 2536e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2537e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma ret = ocfs2_reserve_clusters(osb, clusters_to_add, data_ac); 2538e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (ret < 0) { 2539e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (ret != -ENOSPC) 2540e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma mlog_errno(ret); 2541e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma goto out; 2542e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma } 2543e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2544e7d4cb6bc19658646357eeff134645cd9bc3479fTao Maout: 2545e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (ret) { 2546e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma if (*meta_ac) { 2547e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma ocfs2_free_alloc_context(*meta_ac); 2548e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma *meta_ac = NULL; 2549e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma } 2550e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2551e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma /* 2552e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma * We cannot have an error and a non null *data_ac. 2553e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma */ 2554e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma } 2555e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma 2556e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma return ret; 2557e7d4cb6bc19658646357eeff134645cd9bc3479fTao Ma} 25586ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 25596ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang/* 25606ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * Read the inode specified by blkno to get suballoc_slot and 25616ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * suballoc_bit. 25626ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang */ 25636ca497a83e592d64e050c4d04b6dedb8c915f39awengang wangstatic int ocfs2_get_suballoc_slot_bit(struct ocfs2_super *osb, u64 blkno, 25646ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang u16 *suballoc_slot, u16 *suballoc_bit) 25656ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang{ 25666ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang int status; 25676ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct buffer_head *inode_bh = NULL; 25686ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct ocfs2_dinode *inode_fe; 25696ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 25705b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker mlog_entry("blkno: %llu\n", (unsigned long long)blkno); 25716ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 25726ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang /* dirty read disk */ 25736ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = ocfs2_read_blocks_sync(osb, blkno, 1, &inode_bh); 25746ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (status < 0) { 25755b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker mlog(ML_ERROR, "read block %llu failed %d\n", 25765b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker (unsigned long long)blkno, status); 25776ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 25786ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 25796ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 25806ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang inode_fe = (struct ocfs2_dinode *) inode_bh->b_data; 25816ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (!OCFS2_IS_VALID_DINODE(inode_fe)) { 25825b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker mlog(ML_ERROR, "invalid inode %llu requested\n", 25835b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker (unsigned long long)blkno); 25846ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = -EINVAL; 25856ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 25866ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 25876ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 25880fba813748f16f4eaf24d492c505226c4026d58fTao Ma if (le16_to_cpu(inode_fe->i_suballoc_slot) != (u16)OCFS2_INVALID_SLOT && 25896ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang (u32)le16_to_cpu(inode_fe->i_suballoc_slot) > osb->max_slots - 1) { 25906ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mlog(ML_ERROR, "inode %llu has invalid suballoc slot %u\n", 25915b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker (unsigned long long)blkno, 25925b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker (u32)le16_to_cpu(inode_fe->i_suballoc_slot)); 25936ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = -EINVAL; 25946ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 25956ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 25966ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 25976ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (suballoc_slot) 25986ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang *suballoc_slot = le16_to_cpu(inode_fe->i_suballoc_slot); 25996ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (suballoc_bit) 26006ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang *suballoc_bit = le16_to_cpu(inode_fe->i_suballoc_bit); 26016ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 26026ca497a83e592d64e050c4d04b6dedb8c915f39awengang wangbail: 26036ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang brelse(inode_bh); 26046ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 26056ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mlog_exit(status); 26066ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang return status; 26076ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang} 26086ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 26096ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang/* 26106ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * test whether bit is SET in allocator bitmap or not. on success, 0 26116ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * is returned and *res is 1 for SET; 0 otherwise. when fails, errno 26126ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * is returned and *res is meaningless. Call this after you have 26136ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * cluster locked against suballoc, or you may get a result based on 26146ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * non-up2date contents 26156ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang */ 26166ca497a83e592d64e050c4d04b6dedb8c915f39awengang wangstatic int ocfs2_test_suballoc_bit(struct ocfs2_super *osb, 26176ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct inode *suballoc, 26186ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct buffer_head *alloc_bh, u64 blkno, 26196ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang u16 bit, int *res) 26206ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang{ 26216ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct ocfs2_dinode *alloc_fe; 26226ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct ocfs2_group_desc *group; 26236ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct buffer_head *group_bh = NULL; 26246ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang u64 bg_blkno; 26256ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang int status; 26266ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 26275b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker mlog_entry("blkno: %llu bit: %u\n", (unsigned long long)blkno, 26285b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker (unsigned int)bit); 26296ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 26306ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang alloc_fe = (struct ocfs2_dinode *)alloc_bh->b_data; 26316ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if ((bit + 1) > ocfs2_bits_per_group(&alloc_fe->id2.i_chain)) { 26326ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mlog(ML_ERROR, "suballoc bit %u out of range of %u\n", 26336ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang (unsigned int)bit, 26346ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang ocfs2_bits_per_group(&alloc_fe->id2.i_chain)); 26356ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = -EINVAL; 26366ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 26376ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 26386ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 26396ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang bg_blkno = ocfs2_which_suballoc_group(blkno, bit); 26406ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = ocfs2_read_group_descriptor(suballoc, alloc_fe, bg_blkno, 26416ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang &group_bh); 26426ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (status < 0) { 26435b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker mlog(ML_ERROR, "read group %llu failed %d\n", 26445b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker (unsigned long long)bg_blkno, status); 26456ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 26466ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 26476ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 26486ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang group = (struct ocfs2_group_desc *) group_bh->b_data; 26496ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang *res = ocfs2_test_bit(bit, (unsigned long *)group->bg_bitmap); 26506ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 26516ca497a83e592d64e050c4d04b6dedb8c915f39awengang wangbail: 26526ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang brelse(group_bh); 26536ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 26546ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mlog_exit(status); 26556ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang return status; 26566ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang} 26576ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 26586ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang/* 26596ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * Test if the bit representing this inode (blkno) is set in the 26606ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * suballocator. 26616ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * 26626ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * On success, 0 is returned and *res is 1 for SET; 0 otherwise. 26636ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * 26646ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * In the event of failure, a negative value is returned and *res is 26656ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * meaningless. 26666ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * 26676ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * Callers must make sure to hold nfs_sync_lock to prevent 26686ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * ocfs2_delete_inode() on another node from accessing the same 26696ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * suballocator concurrently. 26706ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang */ 26716ca497a83e592d64e050c4d04b6dedb8c915f39awengang wangint ocfs2_test_inode_bit(struct ocfs2_super *osb, u64 blkno, int *res) 26726ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang{ 26736ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang int status; 26746ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang u16 suballoc_bit = 0, suballoc_slot = 0; 26756ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct inode *inode_alloc_inode; 26766ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang struct buffer_head *alloc_bh = NULL; 26776ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 26785b09b507daaa882d888b6cd78ee89ba9caace44bJoel Becker mlog_entry("blkno: %llu", (unsigned long long)blkno); 26796ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 26806ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = ocfs2_get_suballoc_slot_bit(osb, blkno, &suballoc_slot, 26816ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang &suballoc_bit); 26826ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (status < 0) { 26836ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mlog(ML_ERROR, "get alloc slot and bit failed %d\n", status); 26846ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 26856ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 26866ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 26876ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang inode_alloc_inode = 26886ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE, 26896ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang suballoc_slot); 26906ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (!inode_alloc_inode) { 26916ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang /* the error code could be inaccurate, but we are not able to 26926ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang * get the correct one. */ 26936ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = -EINVAL; 26946ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mlog(ML_ERROR, "unable to get alloc inode in slot %u\n", 26956ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang (u32)suballoc_slot); 26966ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 26976ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 26986ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 26996ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mutex_lock(&inode_alloc_inode->i_mutex); 27006ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = ocfs2_inode_lock(inode_alloc_inode, &alloc_bh, 0); 27016ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (status < 0) { 27026ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mutex_unlock(&inode_alloc_inode->i_mutex); 27036ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mlog(ML_ERROR, "lock on alloc inode on slot %u failed %d\n", 27046ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang (u32)suballoc_slot, status); 27056ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang goto bail; 27066ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang } 27076ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 27086ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang status = ocfs2_test_suballoc_bit(osb, inode_alloc_inode, alloc_bh, 27096ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang blkno, suballoc_bit, res); 27106ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang if (status < 0) 27116ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mlog(ML_ERROR, "test suballoc bit failed %d\n", status); 27126ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 27136ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang ocfs2_inode_unlock(inode_alloc_inode, 0); 27146ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mutex_unlock(&inode_alloc_inode->i_mutex); 27156ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang 27166ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang iput(inode_alloc_inode); 27176ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang brelse(alloc_bh); 27186ca497a83e592d64e050c4d04b6dedb8c915f39awengang wangbail: 27196ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang mlog_exit(status); 27206ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang return status; 27216ca497a83e592d64e050c4d04b6dedb8c915f39awengang wang} 2722