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author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-31 14:52:12 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-31 14:52:12 (GMT) |
commit | eff2502801e9a3a34882c6bd720470d65394522e (patch) | |
tree | 01396fd1e40cedd9cd6b336c27e3f6885af36bc2 /fs | |
parent | f73aaf10ae14ee8f9644b0f7abe252fe7eeb17f5 (diff) | |
parent | a996031c87e093017c0763326a08896a3a4817f4 (diff) | |
download | linux-eff2502801e9a3a34882c6bd720470d65394522e.tar.xz |
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
delay capable() check in ext4_has_free_blocks()
merge ext4_claim_free_blocks & ext4_has_free_blocks
jbd2: Call the commit callback before the transaction could get dropped
ext4: fix a bug accessing freed memory in ext4_abort
ext3: fix a bug accessing freed memory in ext3_abort
Diffstat (limited to 'fs')
-rw-r--r-- | fs/ext3/super.c | 10 | ||||
-rw-r--r-- | fs/ext4/balloc.c | 77 | ||||
-rw-r--r-- | fs/ext4/ext4.h | 3 | ||||
-rw-r--r-- | fs/ext4/super.c | 11 | ||||
-rw-r--r-- | fs/jbd2/commit.c | 8 |
5 files changed, 46 insertions, 63 deletions
diff --git a/fs/ext3/super.c b/fs/ext3/super.c index 18eaa78..e5717a4 100644 --- a/fs/ext3/super.c +++ b/fs/ext3/super.c @@ -281,7 +281,8 @@ void ext3_abort (struct super_block * sb, const char * function, EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS; sb->s_flags |= MS_RDONLY; EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT; - journal_abort(EXT3_SB(sb)->s_journal, -EIO); + if (EXT3_SB(sb)->s_journal) + journal_abort(EXT3_SB(sb)->s_journal, -EIO); } void ext3_warning (struct super_block * sb, const char * function, @@ -390,11 +391,14 @@ static void ext3_put_super (struct super_block * sb) { struct ext3_sb_info *sbi = EXT3_SB(sb); struct ext3_super_block *es = sbi->s_es; - int i; + int i, err; ext3_xattr_put_super(sb); - if (journal_destroy(sbi->s_journal) < 0) + err = journal_destroy(sbi->s_journal); + sbi->s_journal = NULL; + if (err < 0) ext3_abort(sb, __func__, "Couldn't clean up the journal"); + if (!(sb->s_flags & MS_RDONLY)) { EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER); es->s_state = cpu_to_le16(sbi->s_mount_state); diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c index b9821be..d2003cd 100644 --- a/fs/ext4/balloc.c +++ b/fs/ext4/balloc.c @@ -589,21 +589,23 @@ void ext4_free_blocks(handle_t *handle, struct inode *inode, return; } -int ext4_claim_free_blocks(struct ext4_sb_info *sbi, - s64 nblocks) +/** + * ext4_has_free_blocks() + * @sbi: in-core super block structure. + * @nblocks: number of needed blocks + * + * Check if filesystem has nblocks free & available for allocation. + * On success return 1, return 0 on failure. + */ +int ext4_has_free_blocks(struct ext4_sb_info *sbi, s64 nblocks) { - s64 free_blocks, dirty_blocks; - s64 root_blocks = 0; + s64 free_blocks, dirty_blocks, root_blocks; struct percpu_counter *fbc = &sbi->s_freeblocks_counter; struct percpu_counter *dbc = &sbi->s_dirtyblocks_counter; free_blocks = percpu_counter_read_positive(fbc); dirty_blocks = percpu_counter_read_positive(dbc); - - if (!capable(CAP_SYS_RESOURCE) && - sbi->s_resuid != current->fsuid && - (sbi->s_resgid == 0 || !in_group_p(sbi->s_resgid))) - root_blocks = ext4_r_blocks_count(sbi->s_es); + root_blocks = ext4_r_blocks_count(sbi->s_es); if (free_blocks - (nblocks + root_blocks + dirty_blocks) < EXT4_FREEBLOCKS_WATERMARK) { @@ -616,57 +618,32 @@ int ext4_claim_free_blocks(struct ext4_sb_info *sbi, } } /* Check whether we have space after - * accounting for current dirty blocks + * accounting for current dirty blocks & root reserved blocks. */ - if (free_blocks < ((root_blocks + nblocks) + dirty_blocks)) - /* we don't have free space */ - return -ENOSPC; + if (free_blocks >= ((root_blocks + nblocks) + dirty_blocks)) + return 1; + + /* Hm, nope. Are (enough) root reserved blocks available? */ + if (sbi->s_resuid == current->fsuid || + ((sbi->s_resgid != 0) && in_group_p(sbi->s_resgid)) || + capable(CAP_SYS_RESOURCE)) { + if (free_blocks >= (nblocks + dirty_blocks)) + return 1; + } - /* Add the blocks to nblocks */ - percpu_counter_add(dbc, nblocks); return 0; } -/** - * ext4_has_free_blocks() - * @sbi: in-core super block structure. - * @nblocks: number of neeed blocks - * - * Check if filesystem has free blocks available for allocation. - * Return the number of blocks avaible for allocation for this request - * On success, return nblocks - */ -ext4_fsblk_t ext4_has_free_blocks(struct ext4_sb_info *sbi, +int ext4_claim_free_blocks(struct ext4_sb_info *sbi, s64 nblocks) { - s64 free_blocks, dirty_blocks; - s64 root_blocks = 0; - struct percpu_counter *fbc = &sbi->s_freeblocks_counter; - struct percpu_counter *dbc = &sbi->s_dirtyblocks_counter; - - free_blocks = percpu_counter_read_positive(fbc); - dirty_blocks = percpu_counter_read_positive(dbc); - - if (!capable(CAP_SYS_RESOURCE) && - sbi->s_resuid != current->fsuid && - (sbi->s_resgid == 0 || !in_group_p(sbi->s_resgid))) - root_blocks = ext4_r_blocks_count(sbi->s_es); - - if (free_blocks - (nblocks + root_blocks + dirty_blocks) < - EXT4_FREEBLOCKS_WATERMARK) { - free_blocks = percpu_counter_sum(fbc); - dirty_blocks = percpu_counter_sum(dbc); - } - if (free_blocks <= (root_blocks + dirty_blocks)) - /* we don't have free space */ + if (ext4_has_free_blocks(sbi, nblocks)) { + percpu_counter_add(&sbi->s_dirtyblocks_counter, nblocks); return 0; - - if (free_blocks - (root_blocks + dirty_blocks) < nblocks) - return free_blocks - (root_blocks + dirty_blocks); - return nblocks; + } else + return -ENOSPC; } - /** * ext4_should_retry_alloc() * @sb: super block diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 4880cc3..b0537c8 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1003,8 +1003,7 @@ extern ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode, ext4_lblk_t iblock, ext4_fsblk_t goal, unsigned long *count, int *errp); extern int ext4_claim_free_blocks(struct ext4_sb_info *sbi, s64 nblocks); -extern ext4_fsblk_t ext4_has_free_blocks(struct ext4_sb_info *sbi, - s64 nblocks); +extern int ext4_has_free_blocks(struct ext4_sb_info *sbi, s64 nblocks); extern void ext4_free_blocks(handle_t *handle, struct inode *inode, ext4_fsblk_t block, unsigned long count, int metadata); extern void ext4_free_blocks_sb(handle_t *handle, struct super_block *sb, diff --git a/fs/ext4/super.c b/fs/ext4/super.c index bdddea1..994859d 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -333,7 +333,8 @@ void ext4_abort(struct super_block *sb, const char *function, EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; sb->s_flags |= MS_RDONLY; EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; - jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); + if (EXT4_SB(sb)->s_journal) + jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); } void ext4_warning(struct super_block *sb, const char *function, @@ -442,14 +443,16 @@ static void ext4_put_super(struct super_block *sb) { struct ext4_sb_info *sbi = EXT4_SB(sb); struct ext4_super_block *es = sbi->s_es; - int i; + int i, err; ext4_mb_release(sb); ext4_ext_release(sb); ext4_xattr_put_super(sb); - if (jbd2_journal_destroy(sbi->s_journal) < 0) - ext4_abort(sb, __func__, "Couldn't clean up the journal"); + err = jbd2_journal_destroy(sbi->s_journal); sbi->s_journal = NULL; + if (err < 0) + ext4_abort(sb, __func__, "Couldn't clean up the journal"); + if (!(sb->s_flags & MS_RDONLY)) { EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); es->s_state = cpu_to_le16(sbi->s_mount_state); diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c index 8b119e1..ebc667b 100644 --- a/fs/jbd2/commit.c +++ b/fs/jbd2/commit.c @@ -974,6 +974,9 @@ restart_loop: journal->j_committing_transaction = NULL; spin_unlock(&journal->j_state_lock); + if (journal->j_commit_callback) + journal->j_commit_callback(journal, commit_transaction); + if (commit_transaction->t_checkpoint_list == NULL && commit_transaction->t_checkpoint_io_list == NULL) { __jbd2_journal_drop_transaction(journal, commit_transaction); @@ -995,11 +998,8 @@ restart_loop: } spin_unlock(&journal->j_list_lock); - if (journal->j_commit_callback) - journal->j_commit_callback(journal, commit_transaction); - trace_mark(jbd2_end_commit, "dev %s transaction %d head %d", - journal->j_devname, commit_transaction->t_tid, + journal->j_devname, journal->j_commit_sequence, journal->j_tail_sequence); jbd_debug(1, "JBD: commit %d complete, head %d\n", journal->j_commit_sequence, journal->j_tail_sequence); |