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| author |   Dan Williams <dan.j.williams@intel.com> | 2008-04-30 00:52:32 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 08:29:33 -0700 |
| commit | 6bfe0b499082fd3950429017cd8ebf2a6c458aa5 (patch) | |
| tree | 81476cf7f7ddbea135bdb93729e0bffae0e7c163 /include/linux/raid/md.h | |
| parent | md: prevent duplicates in bind_rdev_to_array (diff) | |
| download | linux-dev-6bfe0b499082fd3950429017cd8ebf2a6c458aa5.tar.xz linux-dev-6bfe0b499082fd3950429017cd8ebf2a6c458aa5.zip | |
md: support blocking writes to an array on device failure
Allows a userspace metadata handler to take action upon detecting a device
failure.
Based on an original patch by Neil Brown.
Changes:
-added blocked_wait waitqueue to rdev
-don't qualify Blocked with Faulty always let userspace block writes
-added md_wait_for_blocked_rdev to wait for the block device to be clear, if
userspace misses the notification another one is sent every 5 seconds
-set MD_RECOVERY_NEEDED after clearing "blocked"
-kill DoBlock flag, just test mddev->external
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/raid/md.h')
| -rw-r--r-- | include/linux/raid/md.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/raid/md.h b/include/linux/raid/md.h index 8ab630b67fcc..81a1a02d4566 100644 --- a/include/linux/raid/md.h +++ b/include/linux/raid/md.h @@ -94,6 +94,7 @@ extern int sync_page_io(struct block_device *bdev, sector_t sector, int size, extern void md_do_sync(mddev_t *mddev); extern void md_new_event(mddev_t *mddev); extern void md_allow_write(mddev_t *mddev); +extern void md_wait_for_blocked_rdev(mdk_rdev_t *rdev, mddev_t *mddev); #endif /* CONFIG_MD */ #endif |