The mddev->flags are used for different purposes. There are a lot of
places we check/change the flags without masking unrelated flags, we
could check/change unrelated flags. These usage are most for superblock
write, so spearate superblock related flags. This should make the code
clearer and also fix real bugs.
Signed-off-by: Shaohua Li <shli@xxxxxx>
---
drivers/md/bitmap.c | 4 +-
drivers/md/dm-raid.c | 4 +-
drivers/md/md.c | 115 ++++++++++++++++++++++++-----------------------
drivers/md/md.h | 16 ++++---
drivers/md/multipath.c | 2 +-
drivers/md/raid1.c | 12 ++---
drivers/md/raid10.c | 22 ++++-----
drivers/md/raid5-cache.c | 6 +--
drivers/md/raid5.c | 26 +++++------
9 files changed, 106 insertions(+), 101 deletions(-)
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index c462157..9fb2cca 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -1623,7 +1623,7 @@ void bitmap_cond_end_sync(struct bitmap *bitmap, sector_t sector, bool force)
atomic_read(&bitmap->mddev->recovery_active) == 0);
bitmap->mddev->curr_resync_completed = sector;
- set_bit(MD_CHANGE_CLEAN, &bitmap->mddev->flags);
+ set_bit(MD_SB_CHANGE_CLEAN, &bitmap->mddev->sb_flags);
sector &= ~((1ULL << bitmap->counts.chunkshift) - 1);
s = 0;
while (s < sector && s < bitmap->mddev->resync_max_sectors) {
@@ -2296,7 +2296,7 @@ location_store(struct mddev *mddev, const char *buf, size_t len)
/* Ensure new bitmap info is stored in
* metadata promptly.
*/
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
md_wakeup_thread(mddev->thread);
}
rv = 0;
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 6d53810..953159d 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -2011,7 +2011,7 @@ static int super_load(struct md_rdev *rdev, struct md_rdev *refdev)
sb->compat_features = cpu_to_le32(FEATURE_FLAG_SUPPORTS_V190);
/* Force writing of superblocks to disk */
- set_bit(MD_CHANGE_DEVS, &rdev->mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &rdev->mddev->sb_flags);
/* Any superblock is better than none, choose that if given */
return refdev ? 0 : 1;
@@ -3497,7 +3497,7 @@ static void rs_update_sbs(struct raid_set *rs)
struct mddev *mddev = &rs->md;
int ro = mddev->ro;
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
mddev->ro = 0;
md_update_sb(mddev, 1);
mddev->ro = ro;
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 5e66648..c15e234 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -729,7 +729,7 @@ static void super_written(struct bio *bio)
md_error(mddev, rdev);
if (!test_bit(Faulty, &rdev->flags)
&& (bio->bi_opf & MD_FAILFAST)) {
- set_bit(MD_NEED_REWRITE, &mddev->flags);
+ set_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags);
set_bit(LastDev, &rdev->flags);
}
} else
@@ -780,7 +780,7 @@ int md_super_wait(struct mddev *mddev)
{
/* wait for all superblock writes that were scheduled to complete */
wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0);
- if (test_and_clear_bit(MD_NEED_REWRITE, &mddev->flags))
+ if (test_and_clear_bit(MD_SB_NEED_REWRITE, &mddev->sb_flags))
return -EAGAIN;
return 0;
}
@@ -2322,24 +2322,24 @@ void md_update_sb(struct mddev *mddev, int force_change)
if (mddev->ro) {
if (force_change)
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
return;
}
repeat:
if (mddev_is_clustered(mddev)) {
- if (test_and_clear_bit(MD_CHANGE_DEVS, &mddev->flags))
+ if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags))
force_change = 1;
- if (test_and_clear_bit(MD_CHANGE_CLEAN, &mddev->flags))
+ if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags))
nospares = 1;
ret = md_cluster_ops->metadata_update_start(mddev);
/* Has someone else has updated the sb */
if (!does_sb_need_changing(mddev)) {
if (ret == 0)
md_cluster_ops->metadata_update_cancel(mddev);
- bit_clear_unless(&mddev->flags, BIT(MD_CHANGE_PENDING),
- BIT(MD_CHANGE_DEVS) |
- BIT(MD_CHANGE_CLEAN));
+ bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING),
+ BIT(MD_SB_CHANGE_DEVS) |
+ BIT(MD_SB_CHANGE_CLEAN));
return;
}
}
@@ -2355,10 +2355,10 @@ void md_update_sb(struct mddev *mddev, int force_change)
}
if (!mddev->persistent) {
- clear_bit(MD_CHANGE_CLEAN, &mddev->flags);
- clear_bit(MD_CHANGE_DEVS, &mddev->flags);
+ clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags);
+ clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
if (!mddev->external) {
- clear_bit(MD_CHANGE_PENDING, &mddev->flags);
+ clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags);
rdev_for_each(rdev, mddev) {
if (rdev->badblocks.changed) {
rdev->badblocks.changed = 0;
@@ -2378,9 +2378,9 @@ void md_update_sb(struct mddev *mddev, int force_change)
mddev->utime = ktime_get_real_seconds();
- if (test_and_clear_bit(MD_CHANGE_DEVS, &mddev->flags))
+ if (test_and_clear_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags))
force_change = 1;
- if (test_and_clear_bit(MD_CHANGE_CLEAN, &mddev->flags))
+ if (test_and_clear_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags))
/* just a clean<-> dirty transition, possibly leave spares alone,
* though if events isn't the right even/odd, we will have to do
* spares after all
@@ -2472,14 +2472,14 @@ void md_update_sb(struct mddev *mddev, int force_change)
}
if (md_super_wait(mddev) < 0)
goto rewrite;
- /* if there was a failure, MD_CHANGE_DEVS was set, and we re-write super */
+ /* if there was a failure, MD_SB_CHANGE_DEVS was set, and we re-write super */
if (mddev_is_clustered(mddev) && ret == 0)
md_cluster_ops->metadata_update_finish(mddev);
if (mddev->in_sync != sync_req ||
- !bit_clear_unless(&mddev->flags, BIT(MD_CHANGE_PENDING),
- BIT(MD_CHANGE_DEVS) | BIT(MD_CHANGE_CLEAN)))
+ !bit_clear_unless(&mddev->sb_flags, BIT(MD_SB_CHANGE_PENDING),
+ BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_CLEAN)))
/* have to write it out again */
goto repeat;
wake_up(&mddev->sb_wait);
@@ -2523,7 +2523,7 @@ static int add_bound_rdev(struct md_rdev *rdev)
}
sysfs_notify_dirent_safe(rdev->sysfs_state);
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
if (mddev->degraded)
set_bit(MD_RECOVERY_RECOVER, &mddev->recovery);
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
@@ -2640,7 +2640,7 @@ state_store(struct md_rdev *rdev, const char *buf, size_t len)
if (err == 0) {
md_kick_rdev_from_array(rdev);
if (mddev->pers) {
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
md_wakeup_thread(mddev->thread);
}
md_new_event(mddev);
@@ -3651,7 +3651,7 @@ level_store(struct mddev *mddev, const char *buf, size_t len)
}
blk_set_stacking_limits(&mddev->queue->limits);
pers->run(mddev);
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
mddev_resume(mddev);
if (!mddev->thread)
md_update_sb(mddev, 1);
@@ -3846,7 +3846,7 @@ resync_start_store(struct mddev *mddev, const char *buf, size_t len)
if (!err) {
mddev->recovery_cp = n;
if (mddev->pers)
- set_bit(MD_CHANGE_CLEAN, &mddev->flags);
+ set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags);
}
mddev_unlock(mddev);
return err ?: len;
@@ -3920,7 +3920,7 @@ array_state_show(struct mddev *mddev, char *page)
st = read_auto;
break;
case 0:
- if (test_bit(MD_CHANGE_PENDING, &mddev->flags))
+ if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags))
st = write_pending;
else if (mddev->in_sync)
st = clean;
@@ -3958,7 +3958,7 @@ array_state_store(struct mddev *mddev, const char *buf, size_t len)
spin_lock(&mddev->lock);
if (st == active) {
restart_array(mddev);
- clear_bit(MD_CHANGE_PENDING, &mddev->flags);
+ clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags);
md_wakeup_thread(mddev->thread);
wake_up(&mddev->sb_wait);
err = 0;
@@ -3969,7 +3969,7 @@ array_state_store(struct mddev *mddev, const char *buf, size_t len)
mddev->in_sync = 1;
if (mddev->safemode == 1)
mddev->safemode = 0;
- set_bit(MD_CHANGE_CLEAN, &mddev->flags);
+ set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags);
}
err = 0;
} else
@@ -4035,7 +4035,7 @@ array_state_store(struct mddev *mddev, const char *buf, size_t len)
mddev->in_sync = 1;
if (mddev->safemode == 1)
mddev->safemode = 0;
- set_bit(MD_CHANGE_CLEAN, &mddev->flags);
+ set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags);
}
err = 0;
} else
@@ -4049,7 +4049,7 @@ array_state_store(struct mddev *mddev, const char *buf, size_t len)
err = restart_array(mddev);
if (err)
break;
- clear_bit(MD_CHANGE_PENDING, &mddev->flags);
+ clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags);
wake_up(&mddev->sb_wait);
err = 0;
} else {
@@ -5378,7 +5378,7 @@ int md_run(struct mddev *mddev)
set_bit(MD_RECOVERY_RECOVER, &mddev->recovery);
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
- if (mddev->flags & MD_UPDATE_SB_FLAGS)
+ if (mddev->sb_flags)
md_update_sb(mddev, 0);
md_new_event(mddev);
@@ -5473,6 +5473,7 @@ static void md_clean(struct mddev *mddev)
mddev->level = LEVEL_NONE;
mddev->clevel[0] = 0;
mddev->flags = 0;
+ mddev->sb_flags = 0;
mddev->ro = 0;
mddev->metadata_type[0] = 0;
mddev->chunk_sectors = 0;
@@ -5525,7 +5526,7 @@ static void __md_stop_writes(struct mddev *mddev)
if (mddev->ro == 0 &&
((!mddev->in_sync && !mddev_is_clustered(mddev)) ||
- (mddev->flags & MD_UPDATE_SB_FLAGS))) {
+ mddev->sb_flags)) {
/* mark array as shutdown cleanly */
if (!mddev_is_clustered(mddev))
mddev->in_sync = 1;
@@ -5608,13 +5609,13 @@ static int md_set_readonly(struct mddev *mddev, struct block_device *bdev)
* which will now never happen */
wake_up_process(mddev->sync_thread->tsk);
- if (mddev->external && test_bit(MD_CHANGE_PENDING, &mddev->flags))
+ if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags))
return -EBUSY;
mddev_unlock(mddev);
wait_event(resync_wait, !test_bit(MD_RECOVERY_RUNNING,
&mddev->recovery));
wait_event(mddev->sb_wait,
- !test_bit(MD_CHANGE_PENDING, &mddev->flags));
+ !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags));
mddev_lock_nointr(mddev);
mutex_lock(&mddev->open_mutex);
@@ -6234,7 +6235,7 @@ static int hot_remove_disk(struct mddev *mddev, dev_t dev)
md_cluster_ops->remove_disk(mddev, rdev);
md_kick_rdev_from_array(rdev);
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
if (mddev->thread)
md_wakeup_thread(mddev->thread);
else
@@ -6303,7 +6304,7 @@ static int hot_add_disk(struct mddev *mddev, dev_t dev)
rdev->raid_disk = -1;
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
if (!mddev->thread)
md_update_sb(mddev, 1);
/*
@@ -6460,9 +6461,11 @@ static int set_array_info(struct mddev *mddev, mdu_array_info_t *info)
mddev->max_disks = MD_SB_DISKS;
- if (mddev->persistent)
+ if (mddev->persistent) {
mddev->flags = 0;
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ mddev->sb_flags = 0;
+ }
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9;
mddev->bitmap_info.default_space = 64*2 - (MD_SB_BYTES >> 9);
@@ -7007,11 +7010,11 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
/* If a device failed while we were read-only, we
* need to make sure the metadata is updated now.
*/
- if (test_bit(MD_CHANGE_DEVS, &mddev->flags)) {
+ if (test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)) {
mddev_unlock(mddev);
wait_event(mddev->sb_wait,
- !test_bit(MD_CHANGE_DEVS, &mddev->flags) &&
- !test_bit(MD_CHANGE_PENDING, &mddev->flags));
+ !test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags) &&
+ !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags));
mddev_lock_nointr(mddev);
}
} else {
@@ -7766,8 +7769,8 @@ void md_write_start(struct mddev *mddev, struct bio *bi)
spin_lock(&mddev->lock);
if (mddev->in_sync) {
mddev->in_sync = 0;
- set_bit(MD_CHANGE_CLEAN, &mddev->flags);
- set_bit(MD_CHANGE_PENDING, &mddev->flags);
+ set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags);
+ set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags);
md_wakeup_thread(mddev->thread);
did_change = 1;
}
@@ -7776,7 +7779,7 @@ void md_write_start(struct mddev *mddev, struct bio *bi)
if (did_change)
sysfs_notify_dirent_safe(mddev->sysfs_state);
wait_event(mddev->sb_wait,
- !test_bit(MD_CHANGE_PENDING, &mddev->flags));
+ !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags));
}
EXPORT_SYMBOL(md_write_start);
@@ -7797,7 +7800,7 @@ EXPORT_SYMBOL(md_write_end);
* attempting a GFP_KERNEL allocation while holding the mddev lock.
* Must be called with mddev_lock held.
*
- * In the ->external case MD_CHANGE_PENDING can not be cleared until mddev->lock
+ * In the ->external case MD_SB_CHANGE_PENDING can not be cleared until mddev->lock
* is dropped, so return -EAGAIN after notifying userspace.
*/
int md_allow_write(struct mddev *mddev)
@@ -7812,8 +7815,8 @@ int md_allow_write(struct mddev *mddev)
spin_lock(&mddev->lock);
if (mddev->in_sync) {
mddev->in_sync = 0;
- set_bit(MD_CHANGE_CLEAN, &mddev->flags);
- set_bit(MD_CHANGE_PENDING, &mddev->flags);
+ set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags);
+ set_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags);
if (mddev->safemode_delay &&
mddev->safemode == 0)
mddev->safemode = 1;
@@ -7823,7 +7826,7 @@ int md_allow_write(struct mddev *mddev)
} else
spin_unlock(&mddev->lock);
- if (test_bit(MD_CHANGE_PENDING, &mddev->flags))
+ if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags))
return -EAGAIN;
else
return 0;
@@ -8058,7 +8061,7 @@ void md_do_sync(struct md_thread *thread)
j > mddev->recovery_cp)
mddev->recovery_cp = j;
update_time = jiffies;
- set_bit(MD_CHANGE_CLEAN, &mddev->flags);
+ set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags);
sysfs_notify(&mddev->kobj, NULL, "sync_completed");
}
@@ -8206,8 +8209,8 @@ void md_do_sync(struct md_thread *thread)
/* set CHANGE_PENDING here since maybe another update is needed,
* so other nodes are informed. It should be harmless for normal
* raid */
- set_mask_bits(&mddev->flags, 0,
- BIT(MD_CHANGE_PENDING) | BIT(MD_CHANGE_DEVS));
+ set_mask_bits(&mddev->sb_flags, 0,
+ BIT(MD_SB_CHANGE_PENDING) | BIT(MD_SB_CHANGE_DEVS));
spin_lock(&mddev->lock);
if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) {
@@ -8307,12 +8310,12 @@ static int remove_and_add_spares(struct mddev *mddev,
if (!test_bit(Journal, &rdev->flags))
spares++;
md_new_event(mddev);
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
}
}
no_add:
if (removed)
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
return spares;
}
@@ -8385,7 +8388,7 @@ void md_check_recovery(struct mddev *mddev)
if (mddev->ro && !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery))
return;
if ( ! (
- (mddev->flags & MD_UPDATE_SB_FLAGS & ~ (1<<MD_CHANGE_PENDING)) ||
+ (mddev->sb_flags & ~ (1<<MD_SB_CHANGE_PENDING)) ||
test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) ||
test_bit(MD_RECOVERY_DONE, &mddev->recovery) ||
test_bit(MD_RELOAD_SB, &mddev->flags) ||
@@ -8423,7 +8426,7 @@ void md_check_recovery(struct mddev *mddev)
md_reap_sync_thread(mddev);
clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery);
clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
- clear_bit(MD_CHANGE_PENDING, &mddev->flags);
+ clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags);
goto unlock;
}
@@ -8451,7 +8454,7 @@ void md_check_recovery(struct mddev *mddev)
mddev->recovery_cp == MaxSector) {
mddev->in_sync = 1;
did_change = 1;
- set_bit(MD_CHANGE_CLEAN, &mddev->flags);
+ set_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags);
}
if (mddev->safemode == 1)
mddev->safemode = 0;
@@ -8460,7 +8463,7 @@ void md_check_recovery(struct mddev *mddev)
sysfs_notify_dirent_safe(mddev->sysfs_state);
}
- if (mddev->flags & MD_UPDATE_SB_FLAGS)
+ if (mddev->sb_flags)
md_update_sb(mddev, 0);
if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) &&
@@ -8556,7 +8559,7 @@ void md_reap_sync_thread(struct mddev *mddev)
if (mddev->pers->spare_active(mddev)) {
sysfs_notify(&mddev->kobj, NULL,
"degraded");
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
}
}
if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) &&
@@ -8571,7 +8574,7 @@ void md_reap_sync_thread(struct mddev *mddev)
rdev->saved_raid_disk = -1;
md_update_sb(mddev, 1);
- /* MD_CHANGE_PENDING should be cleared by md_update_sb, so we can
+ /* MD_SB_CHANGE_PENDING should be cleared by md_update_sb, so we can
* call resync_finish here if MD_CLUSTER_RESYNC_LOCKED is set by
* clustered raid */
if (test_and_clear_bit(MD_CLUSTER_RESYNC_LOCKED, &mddev->flags))
@@ -8637,8 +8640,8 @@ int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors,
sysfs_notify(&rdev->kobj, NULL,
"unacknowledged_bad_blocks");
sysfs_notify_dirent_safe(rdev->sysfs_state);
- set_mask_bits(&mddev->flags, 0,
- BIT(MD_CHANGE_CLEAN) | BIT(MD_CHANGE_PENDING));
+ set_mask_bits(&mddev->sb_flags, 0,
+ BIT(MD_SB_CHANGE_CLEAN) | BIT(MD_SB_CHANGE_PENDING));
md_wakeup_thread(rdev->mddev->thread);
return 1;
} else
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 5c08f84..e38936d 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -213,9 +213,6 @@ extern int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors,
struct md_cluster_info;
enum mddev_flags {
- MD_CHANGE_DEVS, /* Some device status has changed */
- MD_CHANGE_CLEAN, /* transition to or from 'clean' */
- MD_CHANGE_PENDING, /* switch from 'clean' to 'active' in progress */
MD_ARRAY_FIRST_USE, /* First use of array, needs initialization */
MD_CLOSING, /* If set, we are closing the array, do not open
* it then */
@@ -231,11 +228,15 @@ enum mddev_flags {
* supported as calls to md_error() will
* never cause the array to become failed.
*/
- MD_NEED_REWRITE, /* metadata write needs to be repeated */
};
-#define MD_UPDATE_SB_FLAGS (BIT(MD_CHANGE_DEVS) | \
- BIT(MD_CHANGE_CLEAN) | \
- BIT(MD_CHANGE_PENDING)) /* If these are set, md_update_sb needed */
+
+enum mddev_sb_flags {
+ MD_SB_CHANGE_DEVS, /* Some device status has changed */
+ MD_SB_CHANGE_CLEAN, /* transition to or from 'clean' */
+ MD_SB_CHANGE_PENDING, /* switch from 'clean' to 'active' in progress */
+ MD_SB_NEED_REWRITE, /* metadata write needs to be repeated */
+};
+
struct mddev {
void *private;
struct md_personality *pers;
@@ -243,6 +244,7 @@ struct mddev {
int md_minor;
struct list_head disks;
unsigned long flags;
+ unsigned long sb_flags;
int suspended;
atomic_t active_io;
diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index 589b807..9fa2d6c 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -208,7 +208,7 @@ static void multipath_error (struct mddev *mddev, struct md_rdev *rdev)
spin_unlock_irqrestore(&conf->device_lock, flags);
}
set_bit(Faulty, &rdev->flags);
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
pr_err("multipath: IO failure on %s, disabling IO path.\n"
"multipath: Operation continuing on %d IO paths.\n",
bdevname(rdev->bdev, b),
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index efc2e74..a1f3fbe 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1517,8 +1517,8 @@ static void raid1_error(struct mddev *mddev, struct md_rdev *rdev)
* if recovery is running, make sure it aborts.
*/
set_bit(MD_RECOVERY_INTR, &mddev->recovery);
- set_mask_bits(&mddev->flags, 0,
- BIT(MD_CHANGE_DEVS) | BIT(MD_CHANGE_PENDING));
+ set_mask_bits(&mddev->sb_flags, 0,
+ BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_PENDING));
pr_crit("md/raid1:%s: Disk failure on %s, disabling device.\n"
"md/raid1:%s: Operation continuing on %d devices.\n",
mdname(mddev), bdevname(rdev->bdev, b),
@@ -2464,10 +2464,10 @@ static void raid1d(struct md_thread *thread)
md_check_recovery(mddev);
if (!list_empty_careful(&conf->bio_end_io_list) &&
- !test_bit(MD_CHANGE_PENDING, &mddev->flags)) {
+ !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) {
LIST_HEAD(tmp);
spin_lock_irqsave(&conf->device_lock, flags);
- if (!test_bit(MD_CHANGE_PENDING, &mddev->flags)) {
+ if (!test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) {
while (!list_empty(&conf->bio_end_io_list)) {
list_move(conf->bio_end_io_list.prev, &tmp);
conf->nr_queued--;
@@ -2521,7 +2521,7 @@ static void raid1d(struct md_thread *thread)
generic_make_request(r1_bio->bios[r1_bio->read_disk]);
cond_resched();
- if (mddev->flags & ~(1<<MD_CHANGE_PENDING))
+ if (mddev->sb_flags & ~(1<<MD_SB_CHANGE_PENDING))
md_check_recovery(mddev);
}
blk_finish_plug(&plug);
@@ -2724,7 +2724,7 @@ static sector_t raid1_sync_request(struct mddev *mddev, sector_t sector_nr,
min_bad, 0
) && ok;
}
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
*skipped = 1;
put_buf(r1_bio);
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 525ca99..ab5e862 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1138,12 +1138,12 @@ static void __make_request(struct mddev *mddev, struct bio *bio)
bio->bi_iter.bi_sector < conf->reshape_progress))) {
/* Need to update reshape_position in metadata */
mddev->reshape_position = conf->reshape_progress;
- set_mask_bits(&mddev->flags, 0,
- BIT(MD_CHANGE_DEVS) | BIT(MD_CHANGE_PENDING));
+ set_mask_bits(&mddev->sb_flags, 0,
+ BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_PENDING));
md_wakeup_thread(mddev->thread);
raid10_log(conf->mddev, "wait reshape metadata");
wait_event(mddev->sb_wait,
- !test_bit(MD_CHANGE_PENDING, &mddev->flags));
+ !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags));
conf->reshape_safe = mddev->reshape_position;
}
@@ -1652,8 +1652,8 @@ static void raid10_error(struct mddev *mddev, struct md_rdev *rdev)
set_bit(MD_RECOVERY_INTR, &mddev->recovery);
set_bit(Blocked, &rdev->flags);
set_bit(Faulty, &rdev->flags);
- set_mask_bits(&mddev->flags, 0,
- BIT(MD_CHANGE_DEVS) | BIT(MD_CHANGE_PENDING));
+ set_mask_bits(&mddev->sb_flags, 0,
+ BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_PENDING));
spin_unlock_irqrestore(&conf->device_lock, flags);
pr_crit("md/raid10:%s: Disk failure on %s, disabling device.\n"
"md/raid10:%s: Operation continuing on %d devices.\n",
@@ -2761,10 +2761,10 @@ static void raid10d(struct md_thread *thread)
md_check_recovery(mddev);
if (!list_empty_careful(&conf->bio_end_io_list) &&
- !test_bit(MD_CHANGE_PENDING, &mddev->flags)) {
+ !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) {
LIST_HEAD(tmp);
spin_lock_irqsave(&conf->device_lock, flags);
- if (!test_bit(MD_CHANGE_PENDING, &mddev->flags)) {
+ if (!test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) {
while (!list_empty(&conf->bio_end_io_list)) {
list_move(conf->bio_end_io_list.prev, &tmp);
conf->nr_queued--;
@@ -2822,7 +2822,7 @@ static void raid10d(struct md_thread *thread)
}
cond_resched();
- if (mddev->flags & ~(1<<MD_CHANGE_PENDING))
+ if (mddev->sb_flags & ~(1<<MD_SB_CHANGE_PENDING))
md_check_recovery(mddev);
}
blk_finish_plug(&plug);
@@ -4209,7 +4209,7 @@ static int raid10_start_reshape(struct mddev *mddev)
spin_unlock_irq(&conf->device_lock);
mddev->raid_disks = conf->geo.raid_disks;
mddev->reshape_position = conf->reshape_progress;
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
clear_bit(MD_RECOVERY_SYNC, &mddev->recovery);
clear_bit(MD_RECOVERY_CHECK, &mddev->recovery);
@@ -4404,9 +4404,9 @@ static sector_t reshape_request(struct mddev *mddev, sector_t sector_nr,
else
mddev->curr_resync_completed = conf->reshape_progress;
conf->reshape_checkpoint = jiffies;
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
md_wakeup_thread(mddev->thread);
- wait_event(mddev->sb_wait, mddev->flags == 0 ||
+ wait_event(mddev->sb_wait, mddev->sb_flags == 0 ||
test_bit(MD_RECOVERY_INTR, &mddev->recovery));
if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) {
allow_barrier(conf);
diff --git a/drivers/md/raid5-cache.c b/drivers/md/raid5-cache.c
index de8a4ed..6d1a150 100644
--- a/drivers/md/raid5-cache.c
+++ b/drivers/md/raid5-cache.c
@@ -1206,8 +1206,8 @@ static void r5l_write_super_and_discard_space(struct r5l_log *log,
* there is a deadlock. We workaround this issue with a trylock.
* FIXME: we could miss discard if we can't take reconfig mutex
*/
- set_mask_bits(&mddev->flags, 0,
- BIT(MD_CHANGE_DEVS) | BIT(MD_CHANGE_PENDING));
+ set_mask_bits(&mddev->sb_flags, 0,
+ BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_PENDING));
if (!mddev_trylock(mddev))
return;
md_update_sb(mddev, 1);
@@ -2197,7 +2197,7 @@ static void r5l_write_super(struct r5l_log *log, sector_t cp)
struct mddev *mddev = log->rdev->mddev;
log->rdev->journal_tail = cp;
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
}
static ssize_t r5c_journal_mode_show(struct mddev *mddev, char *page)
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 3e6a2a0..d40e94d 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -961,7 +961,7 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
if (bad < 0) {
set_bit(BlockedBadBlocks, &rdev->flags);
if (!conf->mddev->external &&
- conf->mddev->flags) {
+ conf->mddev->sb_flags) {
/* It is very unlikely, but we might
* still need to write out the
* bad block log - better give it
@@ -2547,8 +2547,8 @@ static void raid5_error(struct mddev *mddev, struct md_rdev *rdev)
set_bit(Blocked, &rdev->flags);
set_bit(Faulty, &rdev->flags);
- set_mask_bits(&mddev->flags, 0,
- BIT(MD_CHANGE_DEVS) | BIT(MD_CHANGE_PENDING));
+ set_mask_bits(&mddev->sb_flags, 0,
+ BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_PENDING));
pr_crit("md/raid:%s: Disk failure on %s, disabling device.\n"
"md/raid:%s: Operation continuing on %d devices.\n",
mdname(mddev),
@@ -4761,7 +4761,7 @@ static void handle_stripe(struct stripe_head *sh)
}
if (!bio_list_empty(&s.return_bi)) {
- if (test_bit(MD_CHANGE_PENDING, &conf->mddev->flags)) {
+ if (test_bit(MD_SB_CHANGE_PENDING, &conf->mddev->sb_flags)) {
spin_lock_irq(&conf->device_lock);
bio_list_merge(&conf->return_bi, &s.return_bi);
spin_unlock_irq(&conf->device_lock);
@@ -5617,9 +5617,9 @@ static sector_t reshape_request(struct mddev *mddev, sector_t sector_nr, int *sk
mddev->reshape_position = conf->reshape_progress;
mddev->curr_resync_completed = sector_nr;
conf->reshape_checkpoint = jiffies;
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
md_wakeup_thread(mddev->thread);
- wait_event(mddev->sb_wait, mddev->flags == 0 ||
+ wait_event(mddev->sb_wait, mddev->sb_flags == 0 ||
test_bit(MD_RECOVERY_INTR, &mddev->recovery));
if (test_bit(MD_RECOVERY_INTR, &mddev->recovery))
return 0;
@@ -5715,10 +5715,10 @@ static sector_t reshape_request(struct mddev *mddev, sector_t sector_nr, int *sk
mddev->reshape_position = conf->reshape_progress;
mddev->curr_resync_completed = sector_nr;
conf->reshape_checkpoint = jiffies;
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
md_wakeup_thread(mddev->thread);
wait_event(mddev->sb_wait,
- !test_bit(MD_CHANGE_DEVS, &mddev->flags)
+ !test_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags)
|| test_bit(MD_RECOVERY_INTR, &mddev->recovery));
if (test_bit(MD_RECOVERY_INTR, &mddev->recovery))
goto ret;
@@ -5993,10 +5993,10 @@ static void raid5d(struct md_thread *thread)
md_check_recovery(mddev);
if (!bio_list_empty(&conf->return_bi) &&
- !test_bit(MD_CHANGE_PENDING, &mddev->flags)) {
+ !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) {
struct bio_list tmp = BIO_EMPTY_LIST;
spin_lock_irq(&conf->device_lock);
- if (!test_bit(MD_CHANGE_PENDING, &mddev->flags)) {
+ if (!test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)) {
bio_list_merge(&tmp, &conf->return_bi);
bio_list_init(&conf->return_bi);
}
@@ -6043,7 +6043,7 @@ static void raid5d(struct md_thread *thread)
break;
handled += batch_size;
- if (mddev->flags & ~(1<<MD_CHANGE_PENDING)) {
+ if (mddev->sb_flags & ~(1 << MD_SB_CHANGE_PENDING)) {
spin_unlock_irq(&conf->device_lock);
md_check_recovery(mddev);
spin_lock_irq(&conf->device_lock);
@@ -7640,7 +7640,7 @@ static int raid5_start_reshape(struct mddev *mddev)
}
mddev->raid_disks = conf->raid_disks;
mddev->reshape_position = conf->reshape_progress;
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
clear_bit(MD_RECOVERY_SYNC, &mddev->recovery);
clear_bit(MD_RECOVERY_CHECK, &mddev->recovery);
@@ -7906,7 +7906,7 @@ static int raid5_check_reshape(struct mddev *mddev)
conf->chunk_sectors = new_chunk ;
mddev->chunk_sectors = new_chunk;
}
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
md_wakeup_thread(mddev->thread);
}
return check_reshape(mddev);
--
2.9.3
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
