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This fixes a real brown paper bag bug which causes ext4 to choke on

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file systems larger than 512GB.
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Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 regression fix from Theodore Ts'o:
 "This fixes a real brown paper bag bug which causes ext4 to choke on
  file systems larger than 512GB."

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: fix extent status tree regression for file systems > 512GB
This commit is contained in:
Linus Torvalds 2013-02-27 12:22:30 -08:00
commit 7bf2fbcdf5
1 changed files with 11 additions and 8 deletions
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19
fs/ext4/extents_status.h
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@ -20,10 +20,13 @@
#define es_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__)
#endif
#define EXTENT_STATUS_WRITTEN 0x80000000 /* written extent */
#define EXTENT_STATUS_UNWRITTEN 0x40000000 /* unwritten extent */
#define EXTENT_STATUS_DELAYED 0x20000000 /* delayed extent */
#define EXTENT_STATUS_HOLE 0x10000000 /* hole */
/*
* These flags live in the high bits of extent_status.es_pblk
*/
#define EXTENT_STATUS_WRITTEN (1ULL << 63)
#define EXTENT_STATUS_UNWRITTEN (1ULL << 62)
#define EXTENT_STATUS_DELAYED (1ULL << 61)
#define EXTENT_STATUS_HOLE (1ULL << 60)
#define EXTENT_STATUS_FLAGS (EXTENT_STATUS_WRITTEN | \
EXTENT_STATUS_UNWRITTEN | \
@ -58,22 +61,22 @@ extern int ext4_es_lookup_extent(struct inode *inode, ext4_lblk_t lblk,
static inline int ext4_es_is_written(struct extent_status *es)
{
return (es->es_pblk & EXTENT_STATUS_WRITTEN);
return (es->es_pblk & EXTENT_STATUS_WRITTEN) != 0;
}
static inline int ext4_es_is_unwritten(struct extent_status *es)
{
return (es->es_pblk & EXTENT_STATUS_UNWRITTEN);
return (es->es_pblk & EXTENT_STATUS_UNWRITTEN) != 0;
}
static inline int ext4_es_is_delayed(struct extent_status *es)
{
return (es->es_pblk & EXTENT_STATUS_DELAYED);
return (es->es_pblk & EXTENT_STATUS_DELAYED) != 0;
}
static inline int ext4_es_is_hole(struct extent_status *es)
{
return (es->es_pblk & EXTENT_STATUS_HOLE);
return (es->es_pblk & EXTENT_STATUS_HOLE) != 0;
}
static inline ext4_fsblk_t ext4_es_status(struct extent_status *es)