[PATCH -next 04/29] md: add new helpers to suspend/resume and lock/unlock array
From: Yu Kuai <hidden>
Date: 2023-08-03 13:34:10
Also in:
lkml
Subsystem:
software raid (multiple disks) support, the rest · Maintainers:
Song Liu, Yu Kuai, Linus Torvalds
From: Yu Kuai <redacted> The new helpers suspend the array first and then lock the array, Prepare to refactor from: mddev_lock/trylock/lock_nointr mddev_suspend/pers->quiesce mddev_resuem/pers->unquiesce mddev_lock With: mddev_suspend_and_lock/trylock/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 <redacted> --- drivers/md/md.h | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+)
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 32bfe0fe0d97..3a2488231fd2 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h@@ -850,6 +850,42 @@ 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; + + __mddev_suspend(mddev); + 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); + mutex_lock(&mddev->reconfig_mutex); +} + +static inline int mddev_suspend_and_trylock(struct mddev *mddev) +{ + int ret; + + __mddev_suspend(mddev); + ret = mutex_trylock(&mddev->reconfig_mutex); + if (ret) + __mddev_resume(mddev); + + return ret; +} + +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;
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2.39.2