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Btrfs: Add a per-inode csum mutex to avoid races creating csum items

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2008-06-25 16:01:31 -04:00
parent 079899c238
commit 1b1e2135dc
6 changed files with 21 additions and 6 deletions
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6
fs/btrfs/inode.c
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@@ -351,7 +351,9 @@ int __btrfs_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
trans = btrfs_start_transaction(root, 1);
btrfs_set_trans_block_group(trans, inode);
mutex_lock(&BTRFS_I(inode)->csum_mutex);
btrfs_csum_file_blocks(trans, root, inode, bio, sums);
mutex_unlock(&BTRFS_I(inode)->csum_mutex);
ret = btrfs_end_transaction(trans, root);
BUG_ON(ret);
@@ -1400,6 +1402,7 @@ static int btrfs_init_locked_inode(struct inode *inode, void *p)
inode->i_mapping, GFP_NOFS);
extent_io_tree_init(&BTRFS_I(inode)->io_failure_tree,
inode->i_mapping, GFP_NOFS);
mutex_init(&BTRFS_I(inode)->csum_mutex);
atomic_set(&BTRFS_I(inode)->ordered_writeback, 0);
return 0;
}
@@ -1701,6 +1704,7 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
inode->i_mapping, GFP_NOFS);
extent_io_tree_init(&BTRFS_I(inode)->io_failure_tree,
inode->i_mapping, GFP_NOFS);
mutex_init(&BTRFS_I(inode)->csum_mutex);
atomic_set(&BTRFS_I(inode)->ordered_writeback, 0);
BTRFS_I(inode)->delalloc_bytes = 0;
BTRFS_I(inode)->root = root;
@@ -1924,6 +1928,7 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
inode->i_mapping, GFP_NOFS);
extent_io_tree_init(&BTRFS_I(inode)->io_failure_tree,
inode->i_mapping, GFP_NOFS);
mutex_init(&BTRFS_I(inode)->csum_mutex);
BTRFS_I(inode)->delalloc_bytes = 0;
atomic_set(&BTRFS_I(inode)->ordered_writeback, 0);
BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
@@ -2862,6 +2867,7 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
inode->i_mapping, GFP_NOFS);
extent_io_tree_init(&BTRFS_I(inode)->io_failure_tree,
inode->i_mapping, GFP_NOFS);
mutex_init(&BTRFS_I(inode)->csum_mutex);
BTRFS_I(inode)->delalloc_bytes = 0;
atomic_set(&BTRFS_I(inode)->ordered_writeback, 0);
BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;