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Btrfs: Fix hole insertion corner cases

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There were a few places that could cause duplicate extent insertion,
this adjusts the code that creates holes to avoid it.

lookup_extent_map is changed to correctly return all of the extents in a
range, even when there are none matching at the start of the range.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2008-01-22 16:47:59 -05:00
parent c1e32da616
commit 5f56406aab
4 changed files with 127 additions and 14 deletions
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fs/btrfs/ctree.h
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@@ -1170,6 +1170,7 @@ int btrfs_update_inode(struct btrfs_trans_handle *trans,
struct inode *inode);
/* file.c */
int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
extern struct file_operations btrfs_file_operations;
int btrfs_drop_extents(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct inode *inode,