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ext4: Extent overlap bugfix

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This patch adds a check for overlap of extents and cuts short the
new extent to be inserted, if there is a chance of overlap.

Signed-off-by: Amit Arora <aarora@in.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Amit Arora
2007-05-24 13:04:13 -04:00
committed by Theodore Ts'o
parent 8a9dc94498
commit 25d14f983f
2 changed files with 59 additions and 2 deletions
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include/linux/ext4_fs_extents.h
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@@ -190,6 +190,7 @@ ext4_ext_invalidate_cache(struct inode *inode)
extern int ext4_extent_tree_init(handle_t *, struct inode *);
extern int ext4_ext_calc_credits_for_insert(struct inode *, struct ext4_ext_path *);
extern unsigned int ext4_ext_check_overlap(struct inode *, struct ext4_extent *, struct ext4_ext_path *);
extern int ext4_ext_insert_extent(handle_t *, struct inode *, struct ext4_ext_path *, struct ext4_extent *);
extern int ext4_ext_walk_space(struct inode *, unsigned long, unsigned long, ext_prepare_callback, void *);
extern struct ext4_ext_path * ext4_ext_find_extent(struct inode *, int, struct ext4_ext_path *);