diff options
| author | NeilBrown <neilb@suse.de> | 2011-05-11 06:26:20 +0200 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2011-05-11 06:26:20 +0200 |
| commit | bedd86b7773fd97f0d708cc0c371c8963ba7ba9a (patch) | |
| tree | acc508209cdc418fcfe9a1493915dfa88c22bc29 /drivers/md/md.c | |
| parent | md: Fix race when creating a new md device. (diff) | |
| download | linux-bedd86b7773fd97f0d708cc0c371c8963ba7ba9a.tar.xz linux-bedd86b7773fd97f0d708cc0c371c8963ba7ba9a.zip | |
md: reject a re-add request that cannot be honoured.
The 'add_new_disk' ioctl can be used to add a device either as a
spare, or as an active disk that just needs to be resynced based on
write-intent-bitmap information (re-add)
Currently if a re-add is requested but fails we add as a spare
instead. This makes it impossible for user-space to check for
failure.
So change to require that a re-add attempt will either succeed or
completely fail. User-space can then decide what to do next.
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/md.c')
| -rw-r--r-- | drivers/md/md.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 4a4c0f80bdeb..5469ae35ee15 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -5216,6 +5216,16 @@ static int add_new_disk(mddev_t * mddev, mdu_disk_info_t *info) } else super_types[mddev->major_version]. validate_super(mddev, rdev); + if ((info->state & (1<<MD_DISK_SYNC)) && + (!test_bit(In_sync, &rdev->flags) || + rdev->raid_disk != info->raid_disk)) { + /* This was a hot-add request, but events doesn't + * match, so reject it. + */ + export_rdev(rdev); + return -EINVAL; + } + if (test_bit(In_sync, &rdev->flags)) rdev->saved_raid_disk = rdev->raid_disk; else |