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authorNeilBrown <neilb@suse.de>2006-10-03 12:15:46 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-03 19:04:17 +0400
commit850b2b420cd5b363ed4cf48a8816d656c8b5251b (patch)
treeb63aa37b3fb7dfb7a0b674d5a2ebe9da13cc7405 /drivers/md/multipath.c
parent6814d5368d68341ec6b5e4ecd10ea5947130775a (diff)
downloadlinux-850b2b420cd5b363ed4cf48a8816d656c8b5251b.tar.xz
[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 'drivers/md/multipath.c')
-rw-r--r--drivers/md/multipath.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index 1cc9de44ce86..e4f168d063db 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -253,7 +253,7 @@ static void multipath_error (mddev_t *mddev, mdk_rdev_t *rdev)
char b[BDEVNAME_SIZE];
clear_bit(In_sync, &rdev->flags);
set_bit(Faulty, &rdev->flags);
- mddev->sb_dirty = 1;
+ set_bit(MD_CHANGE_DEVS, &mddev->flags);
conf->working_disks--;
printk(KERN_ALERT "multipath: IO failure on %s,"
" disabling IO path. \n Operation continuing"
@@ -470,7 +470,6 @@ static int multipath_run (mddev_t *mddev)
}
conf->raid_disks = mddev->raid_disks;
- mddev->sb_dirty = 1;
conf->mddev = mddev;
spin_lock_init(&conf->device_lock);
INIT_LIST_HEAD(&conf->retry_list);