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Fix hole start calculation in btrfs_settar

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2008-01-30 14:33:02 -05:00
parent f392a938f3
commit 1b0f7c29e2
1 changed files with 5 additions and 11 deletions
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16
fs/btrfs/inode.c
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@ -1000,20 +1000,14 @@ static int btrfs_setattr(struct dentry *dentry, struct iattr *attr)
struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
u64 mask = root->sectorsize - 1;
u64 pos = (inode->i_size + mask) & ~mask;
u64 hole_start = (inode->i_size + mask) & ~mask;
u64 block_end = (attr->ia_size + mask) & ~mask;
u64 hole_start;
u64 hole_size;
u64 alloc_hint = 0;
if (attr->ia_size <= pos)
if (attr->ia_size <= hole_start)
goto out;
if (pos != inode->i_size)
hole_start = pos + root->sectorsize;
else
hole_start = pos;
mutex_lock(&root->fs_info->fs_mutex);
err = btrfs_check_free_space(root, 1, 0);
mutex_unlock(&root->fs_info->fs_mutex);
@ -1022,14 +1016,14 @@ static int btrfs_setattr(struct dentry *dentry, struct iattr *attr)
btrfs_truncate_page(inode->i_mapping, inode->i_size);
lock_extent(io_tree, pos, block_end - 1, GFP_NOFS);
lock_extent(io_tree, hole_start, block_end - 1, GFP_NOFS);
hole_size = block_end - hole_start;
mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
btrfs_set_trans_block_group(trans, inode);
err = btrfs_drop_extents(trans, root, inode,
pos, block_end, pos,
hole_start, block_end, hole_start,
&alloc_hint);
if (alloc_hint != EXTENT_MAP_INLINE) {
@ -1043,7 +1037,7 @@ static int btrfs_setattr(struct dentry *dentry, struct iattr *attr)
}
btrfs_end_transaction(trans, root);
mutex_unlock(&root->fs_info->fs_mutex);
unlock_extent(io_tree, pos, block_end - 1, GFP_NOFS);
unlock_extent(io_tree, hole_start, block_end - 1, GFP_NOFS);
if (err)
return err;
}