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| author | NeilBrown <neilb@suse.de> | 2006-10-03 01:15:46 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-03 08:04:17 -0700 |
| commit | 850b2b420cd5b363ed4cf48a8816d656c8b5251b (patch) | |
| tree | b63aa37b3fb7dfb7a0b674d5a2ebe9da13cc7405 /include/linux/raid/md_k.h | |
| parent | 6814d5368d68341ec6b5e4ecd10ea5947130775a (diff) | |
| download | linux-850b2b420cd5b363ed4cf48a8816d656c8b5251b.tar.gz linux-850b2b420cd5b363ed4cf48a8816d656c8b5251b.tar.bz2 linux-850b2b420cd5b363ed4cf48a8816d656c8b5251b.zip | |
[PATCH] md: replace magic numbers in sb_dirty with well defined bit flags
Instead of magic numbers (0,1,2,3) in sb_dirty, we have
some flags instead:
MD_CHANGE_DEVS
Some device state has changed requiring superblock update
on all devices.
MD_CHANGE_CLEAN
The array has transitions from 'clean' to 'dirty' or back,
requiring a superblock update on active devices, but possibly
not on spares
MD_CHANGE_PENDING
A superblock update is underway.
We wait for an update to complete by waiting for all flags to be clear. A
flag can be set at any time, even during an update, without risk that the
change will be lost.
Stop exporting md_update_sb - isn't needed.
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 'include/linux/raid/md_k.h')
| -rw-r--r-- | include/linux/raid/md_k.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h index 920b94fe31fa..e423dad1a7fd 100644 --- a/include/linux/raid/md_k.h +++ b/include/linux/raid/md_k.h @@ -116,7 +116,11 @@ struct mddev_s dev_t unit; int md_minor; struct list_head disks; - int sb_dirty; + unsigned long flags; +#define MD_CHANGE_DEVS 0 /* Some device status has changed */ +#define MD_CHANGE_CLEAN 1 /* transition to or from 'clean' */ +#define MD_CHANGE_PENDING 2 /* superblock update in progress */ + int ro; struct gendisk *gendisk; |