diff options
| author | Artur Paszkiewicz <artur.paszkiewicz@intel.com> | 2017-03-09 12:00:02 +0300 |
|---|---|---|
| committer | Shaohua Li <shli@fb.com> | 2017-03-17 02:55:56 +0300 |
| commit | 6358c239d88c751a9f14152a8d4ad2b69f5be48f (patch) | |
| tree | 624a99ba683e1ee7115b2e0c5ac9845436524a09 /drivers/md/raid5.c | |
| parent | 4536bf9ba2d03404655586b07f8830b6f2106242 (diff) | |
| download | linux-6358c239d88c751a9f14152a8d4ad2b69f5be48f.tar.xz | |
raid5-ppl: support disk hot add/remove with PPL
Add a function to modify the log by removing an rdev when a drive fails
or adding when a spare/replacement is activated as a raid member.
Removing a disk just clears the child log rdev pointer. No new stripes
will be accepted for this child log in ppl_write_stripe() and running io
units will be processed without writing PPL to the device.
Adding a disk sets the child log rdev pointer and writes an empty PPL
header.
Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/raid5.c')
| -rw-r--r-- | drivers/md/raid5.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 78ed5748d33d..6760af251864 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -7648,6 +7648,11 @@ static int raid5_remove_disk(struct mddev *mddev, struct md_rdev *rdev) *rdevp = rdev; } } + if (!err) { + err = log_modify(conf, rdev, false); + if (err) + goto abort; + } if (p->replacement) { /* We must have just cleared 'rdev' */ p->rdev = p->replacement; @@ -7657,6 +7662,9 @@ static int raid5_remove_disk(struct mddev *mddev, struct md_rdev *rdev) */ p->replacement = NULL; clear_bit(WantReplacement, &rdev->flags); + + if (!err) + err = log_modify(conf, p->rdev, true); } else /* We might have just removed the Replacement as faulty- * clear the bit just in case @@ -7713,10 +7721,12 @@ static int raid5_add_disk(struct mddev *mddev, struct md_rdev *rdev) if (p->rdev == NULL) { clear_bit(In_sync, &rdev->flags); rdev->raid_disk = disk; - err = 0; if (rdev->saved_raid_disk != disk) conf->fullsync = 1; rcu_assign_pointer(p->rdev, rdev); + + err = log_modify(conf, rdev, true); + goto out; } } |