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Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md

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Pull MD updates from Shaohua Li:
 "A few MD fixes for 4.19-rc1:

   - several md-cluster fixes from Guoqing

   - a data corruption fix from BingJing

   - other cleanups"

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
  md/raid5: fix data corruption of replacements after originals dropped
  drivers/md/raid5: Do not disable irq on release_inactive_stripe_list() call
  drivers/md/raid5: Use irqsave variant of atomic_dec_and_lock()
  md/r5cache: remove redundant pointer bio
  md-cluster: don't send msg if array is closing
  md-cluster: show array's status more accurate
  md-cluster: clear another node's suspend_area after the copy is finished
This commit is contained in:
Linus Torvalds 2018-08-14 11:03:16 -07:00
commit b219a1d2de
5 changed files with 61 additions and 18 deletions
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47
drivers/md/md-cluster.c
View File

@ -304,15 +304,6 @@ static void recover_bitmaps(struct md_thread *thread)
while (cinfo->recovery_map) {
slot = fls64((u64)cinfo->recovery_map) - 1;
/* Clear suspend_area associated with the bitmap */
spin_lock_irq(&cinfo->suspend_lock);
list_for_each_entry_safe(s, tmp, &cinfo->suspend_list, list)
if (slot == s->slot) {
list_del(&s->list);
kfree(s);
}
spin_unlock_irq(&cinfo->suspend_lock);
snprintf(str, 64, "bitmap%04d", slot);
bm_lockres = lockres_init(mddev, str, NULL, 1);
if (!bm_lockres) {
@ -331,14 +322,30 @@ static void recover_bitmaps(struct md_thread *thread)
pr_err("md-cluster: Could not copy data from bitmap %d\n", slot);
goto clear_bit;
}
/* Clear suspend_area associated with the bitmap */
spin_lock_irq(&cinfo->suspend_lock);
list_for_each_entry_safe(s, tmp, &cinfo->suspend_list, list)
if (slot == s->slot) {
list_del(&s->list);
kfree(s);
}
spin_unlock_irq(&cinfo->suspend_lock);
if (hi > 0) {
if (lo < mddev->recovery_cp)
mddev->recovery_cp = lo;
/* wake up thread to continue resync in case resync
* is not finished */
if (mddev->recovery_cp != MaxSector) {
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
md_wakeup_thread(mddev->thread);
/*
* clear the REMOTE flag since we will launch
* resync thread in current node.
*/
clear_bit(MD_RESYNCING_REMOTE,
&mddev->recovery);
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
md_wakeup_thread(mddev->thread);
}
}
clear_bit:
@ -457,6 +464,11 @@ static void process_suspend_info(struct mddev *mddev,
struct suspend_info *s;
if (!hi) {
/*
* clear the REMOTE flag since resync or recovery is finished
* in remote node.
*/
clear_bit(MD_RESYNCING_REMOTE, &mddev->recovery);
remove_suspend_info(mddev, slot);
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
md_wakeup_thread(mddev->thread);
@ -585,6 +597,7 @@ static int process_recvd_msg(struct mddev *mddev, struct cluster_msg *msg)
revalidate_disk(mddev->gendisk);
break;
case RESYNCING:
set_bit(MD_RESYNCING_REMOTE, &mddev->recovery);
process_suspend_info(mddev, le32_to_cpu(msg->slot),
le64_to_cpu(msg->low),
le64_to_cpu(msg->high));
@ -1265,8 +1278,18 @@ static int resync_info_update(struct mddev *mddev, sector_t lo, sector_t hi)
static int resync_finish(struct mddev *mddev)
{
struct md_cluster_info *cinfo = mddev->cluster_info;
clear_bit(MD_RESYNCING_REMOTE, &mddev->recovery);
dlm_unlock_sync(cinfo->resync_lockres);
return resync_info_update(mddev, 0, 0);
/*
* If resync thread is interrupted so we can't say resync is finished,
* another node will launch resync thread to continue.
*/
if (test_bit(MD_CLOSING, &mddev->flags))
return 0;
else
return resync_info_update(mddev, 0, 0);
}
static int area_resyncing(struct mddev *mddev, int direction,

17
drivers/md/md.c
View File

@ -7677,6 +7677,23 @@ static int status_resync(struct seq_file *seq, struct mddev *mddev)
resync -= atomic_read(&mddev->recovery_active);
if (resync == 0) {
if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery)) {
struct md_rdev *rdev;
rdev_for_each(rdev, mddev)
if (rdev->raid_disk >= 0 &&
!test_bit(Faulty, &rdev->flags) &&
rdev->recovery_offset != MaxSector &&
rdev->recovery_offset) {
seq_printf(seq, "\trecover=REMOTE");
return 1;
}
if (mddev->reshape_position != MaxSector)
seq_printf(seq, "\treshape=REMOTE");
else
seq_printf(seq, "\tresync=REMOTE");
return 1;
}
if (mddev->recovery_cp < MaxSector) {
seq_printf(seq, "\tresync=PENDING");
return 1;

1
drivers/md/md.h
View File

@ -496,6 +496,7 @@ enum recovery_flags {
MD_RECOVERY_FROZEN, /* User request to abort, and not restart, any action */
MD_RECOVERY_ERROR, /* sync-action interrupted because io-error */
MD_RECOVERY_WAIT, /* waiting for pers->start() to finish */
MD_RESYNCING_REMOTE, /* remote node is running resync thread */
};
static inline int __must_check mddev_lock(struct mddev *mddev)

2
drivers/md/raid5-cache.c
View File

@ -717,7 +717,6 @@ static void r5c_disable_writeback_async(struct work_struct *work)
static void r5l_submit_current_io(struct r5l_log *log)
{
struct r5l_io_unit *io = log->current_io;
struct bio *bio;
struct r5l_meta_block *block;
unsigned long flags;
u32 crc;
@ -730,7 +729,6 @@ static void r5l_submit_current_io(struct r5l_log *log)
block->meta_size = cpu_to_le32(io->meta_offset);
crc = crc32c_le(log->uuid_checksum, block, PAGE_SIZE);
block->checksum = cpu_to_le32(crc);
bio = io->current_bio;
log->current_io = NULL;
spin_lock_irqsave(&log->io_list_lock, flags);

12
drivers/md/raid5.c
View File

@ -409,16 +409,14 @@ void raid5_release_stripe(struct stripe_head *sh)
md_wakeup_thread(conf->mddev->thread);
return;
slow_path:
local_irq_save(flags);
/* we are ok here if STRIPE_ON_RELEASE_LIST is set or not */
if (atomic_dec_and_lock(&sh->count, &conf->device_lock)) {
if (atomic_dec_and_lock_irqsave(&sh->count, &conf->device_lock, flags)) {
INIT_LIST_HEAD(&list);
hash = sh->hash_lock_index;
do_release_stripe(conf, sh, &list);
spin_unlock(&conf->device_lock);
spin_unlock_irqrestore(&conf->device_lock, flags);
release_inactive_stripe_list(conf, &list, hash);
}
local_irq_restore(flags);
}
static inline void remove_hash(struct stripe_head *sh)
@ -4521,6 +4519,12 @@ static void analyse_stripe(struct stripe_head *sh, struct stripe_head_state *s)
s->failed++;
if (rdev && !test_bit(Faulty, &rdev->flags))
do_recovery = 1;
else if (!rdev) {
rdev = rcu_dereference(
conf->disks[i].replacement);
if (rdev && !test_bit(Faulty, &rdev->flags))
do_recovery = 1;
}
}
if (test_bit(R5_InJournal, &dev->flags))