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| author | Chris Mason <chris.mason@oracle.com> | 2007-04-10 13:51:41 -0400 |
|---|---|---|
| committer | David Woodhouse <dwmw2@hera.kernel.org> | 2007-04-10 13:51:41 -0400 |
| commit | 79b2cb1fa6430501907cb1384abbddf074833e45 (patch) | |
| tree | 495f4481f83b97a9b25eb16cdbeb0f699f424fee /fs | |
| parent | 48ddc6f44b5a167c00573b6012727d674e9c667a (diff) | |
| download | op-kernel-dev-79b2cb1fa6430501907cb1384abbddf074833e45.zip op-kernel-dev-79b2cb1fa6430501907cb1384abbddf074833e45.tar.gz | |
Btrfs: only cow in get_block when create==1
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/super.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 91aa1b4..a318397 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1020,7 +1020,7 @@ static int btrfs_get_block_lock(struct inode *inode, sector_t iblock, ret = btrfs_lookup_file_extent(trans, root, path, inode->i_ino, - iblock << inode->i_blkbits, 1); + iblock << inode->i_blkbits, create); if (ret < 0) { err = ret; goto out; @@ -1046,7 +1046,8 @@ static int btrfs_get_block_lock(struct inode *inode, sector_t iblock, if (ret == 0) { err = 0; BUG_ON(btrfs_file_extent_disk_num_blocks(item) != 1); - if (btrfs_file_extent_generation(item) != trans->transid) { + if (create && + btrfs_file_extent_generation(item) != trans->transid) { struct btrfs_key ins; ret = btrfs_alloc_extent(trans, root, 1, blocknr, (u64)-1, &ins); |
