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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:
  ext4: Issue the discard operation *before* releasing the blocks to be reused
  ext4: Fix buffer head leaks after calls to ext4_get_inode_loc()
  ext4: Fix possible lost inode write in no journal mode
This commit is contained in:
Linus Torvalds 2010-04-25 10:01:51 -07:00
parent ddc9b34c3b b90f687018
commit 202f2bb070
3 changed files with 14 additions and 11 deletions
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1
fs/ext4/extents.c
View File

@ -3879,6 +3879,7 @@ static int ext4_xattr_fiemap(struct inode *inode,
physical += offset;
length = EXT4_SB(inode->i_sb)->s_inode_size - offset;
flags |= FIEMAP_EXTENT_DATA_INLINE;
brelse(iloc.bh);
} else { /* external block */
physical = EXT4_I(inode)->i_file_acl << blockbits;
length = inode->i_sb->s_blocksize;

3
fs/ext4/inode.c
View File

@ -5375,7 +5375,7 @@ int ext4_write_inode(struct inode *inode, struct writeback_control *wbc)
} else {
struct ext4_iloc iloc;
err = ext4_get_inode_loc(inode, &iloc);
err = __ext4_get_inode_loc(inode, &iloc, 0);
if (err)
return err;
if (wbc->sync_mode == WB_SYNC_ALL)
@ -5386,6 +5386,7 @@ int ext4_write_inode(struct inode *inode, struct writeback_control *wbc)
(unsigned long long)iloc.bh->b_blocknr);
err = -EIO;
}
brelse(iloc.bh);
}
return err;
}

21
fs/ext4/mballoc.c
View File

@ -2535,6 +2535,17 @@ static void release_blocks_on_commit(journal_t *journal, transaction_t *txn)
mb_debug(1, "gonna free %u blocks in group %u (0x%p):",
entry->count, entry->group, entry);
if (test_opt(sb, DISCARD)) {
ext4_fsblk_t discard_block;
discard_block = entry->start_blk +
ext4_group_first_block_no(sb, entry->group);
trace_ext4_discard_blocks(sb,
(unsigned long long)discard_block,
entry->count);
sb_issue_discard(sb, discard_block, entry->count);
}
err = ext4_mb_load_buddy(sb, entry->group, &e4b);
/* we expect to find existing buddy because it's pinned */
BUG_ON(err != 0);
@ -2556,16 +2567,6 @@ static void release_blocks_on_commit(journal_t *journal, transaction_t *txn)
page_cache_release(e4b.bd_bitmap_page);
}
ext4_unlock_group(sb, entry->group);
if (test_opt(sb, DISCARD)) {
ext4_fsblk_t discard_block;
discard_block = entry->start_blk +
ext4_group_first_block_no(sb, entry->group);
trace_ext4_discard_blocks(sb,
(unsigned long long)discard_block,
entry->count);
sb_issue_discard(sb, discard_block, entry->count);
}
kmem_cache_free(ext4_free_ext_cachep, entry);
ext4_mb_release_desc(&e4b);
}