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| author |   NeilBrown <neilb@suse.de> | 2006-04-10 22:52:48 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-04-11 06:18:30 -0700 |
| commit | 6f91fe88e4e28b40b4f08d99e0ea6d17b70e9567 (patch) | |
| tree | 035ac07180e058579ee8023ed0fcb12e40315594 /include/linux/raid/md_p.h | |
| parent | [PATCH] Fix NULL pointer dereference in node_read_numastat() (diff) | |
| download | linux-dev-6f91fe88e4e28b40b4f08d99e0ea6d17b70e9567.tar.xz linux-dev-6f91fe88e4e28b40b4f08d99e0ea6d17b70e9567.zip | |
[PATCH] md: make sure 64bit fields in version-1 metadata are 64-bit aligned
reshape_position is a 64bit field that was not 64bit aligned. So swap with
new_level.
NOTE: this is a user-visible change. However:
- The bad code has not appeared in a released kernel
- This code is still marked 'experimental'
- This only affects version-1 superblock, which are not in wide use
- These field are only used (rather than simply reported) by user-space
tools in extemely rare circumstances : after a reshape crashes in the
first second of the reshape process.
So I believe that, at this stage, the change is safe. Especially if people
heed the 'help' message on use mdadm-2.4.1.
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to '')
| -rw-r--r-- | include/linux/raid/md_p.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/raid/md_p.h b/include/linux/raid/md_p.h index 774e1acfb8c4..f1fbae7e390e 100644 --- a/include/linux/raid/md_p.h +++ b/include/linux/raid/md_p.h @@ -227,8 +227,8 @@ struct mdp_superblock_1 { */ /* These are only valid with feature bit '4' */ - __u64 reshape_position; /* next address in array-space for reshape */ __u32 new_level; /* new level we are reshaping to */ + __u64 reshape_position; /* next address in array-space for reshape */ __u32 delta_disks; /* change in number of raid_disks */ __u32 new_layout; /* new layout */ __u32 new_chunk; /* new chunk size (bytes) */ |