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author | Yu Kuai <yukuai3@huawei.com> | 2023-10-10 23:19:44 +0800 |
---|---|---|
committer | Song Liu <song@kernel.org> | 2023-10-10 18:49:49 -0700 |
commit | f45461e24febab5c2ba8f331e9eb109bb59cbdc1 (patch) | |
tree | ca9815a12ddefe8cfe516d42308f0c571ed05668 /drivers | |
parent | 714d20150ed85811193ae07a494d91f9927c590f (diff) | |
download | linux-stable-f45461e24febab5c2ba8f331e9eb109bb59cbdc1.tar.gz linux-stable-f45461e24febab5c2ba8f331e9eb109bb59cbdc1.tar.bz2 linux-stable-f45461e24febab5c2ba8f331e9eb109bb59cbdc1.zip |
md: add new helpers to suspend/resume and lock/unlock array
The new helpers suspend the array first and then lock the array,
Prepare to refactor from:
mddev_lock/lock_nointr
mddev_suspend
...
mddev_resuem
mddev_lock
With:
mddev_suspend_and_lock/lock_nointr
...
mddev_unlock_and_resume
After all the use cases is refactored, mddev_suspend/resume() will be
removed.
And mddev_suspend_and_lock() will also replace mddev_lock() for the case
that the array will be reconfigured, in order to synchronize with io to
prevent problems in many corner cases.
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20231010151958.145896-6-yukuai1@huaweicloud.com
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/md/md.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/md/md.h b/drivers/md/md.h index b5894dc64615..5c8f3f045e78 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -858,6 +858,33 @@ static inline void mddev_check_write_zeroes(struct mddev *mddev, struct bio *bio mddev->queue->limits.max_write_zeroes_sectors = 0; } +static inline int mddev_suspend_and_lock(struct mddev *mddev) +{ + int ret; + + ret = __mddev_suspend(mddev, true); + if (ret) + return ret; + + ret = mddev_lock(mddev); + if (ret) + __mddev_resume(mddev); + + return ret; +} + +static inline void mddev_suspend_and_lock_nointr(struct mddev *mddev) +{ + __mddev_suspend(mddev, false); + mutex_lock(&mddev->reconfig_mutex); +} + +static inline void mddev_unlock_and_resume(struct mddev *mddev) +{ + mddev_unlock(mddev); + __mddev_resume(mddev); +} + struct mdu_array_info_s; struct mdu_disk_info_s; |