diff options
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/Kconfig | 11 | ||||
| -rw-r--r-- | drivers/md/md.c | 25 |
2 files changed, 19 insertions, 17 deletions
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig index fd2aae150cc..ac25a48362a 100644 --- a/drivers/md/Kconfig +++ b/drivers/md/Kconfig @@ -139,11 +139,12 @@ config MD_RAID5_RESHAPE is online. However it is still EXPERIMENTAL code. It should work, but please be sure that you have backups. - You will need a version of mdadm newer than 2.3.1. During the - early stage of reshape there is a critical section where live data - is being over-written. A crash during this time needs extra care - for recovery. The newer mdadm takes a copy of the data in the - critical section and will restore it, if necessary, after a crash. + You will need mdadm verion 2.4.1 or later to use this + feature safely. During the early stage of reshape there is + a critical section where live data is being over-written. A + crash during this time needs extra care for recovery. The + newer mdadm takes a copy of the data in the critical section + and will restore it, if necessary, after a crash. The mdadm usage is e.g. mdadm --grow /dev/md1 --raid-disks=6 diff --git a/drivers/md/md.c b/drivers/md/md.c index 1ed5152db45..d7316b829a6 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -163,6 +163,7 @@ void md_new_event(mddev_t *mddev) { atomic_inc(&md_event_count); wake_up(&md_event_waiters); + sysfs_notify(&mddev->kobj, NULL, "sync_action"); } EXPORT_SYMBOL_GPL(md_new_event); @@ -278,11 +279,6 @@ static inline int mddev_lock(mddev_t * mddev) return mutex_lock_interruptible(&mddev->reconfig_mutex); } -static inline void mddev_lock_uninterruptible(mddev_t * mddev) -{ - mutex_lock(&mddev->reconfig_mutex); -} - static inline int mddev_trylock(mddev_t * mddev) { return mutex_trylock(&mddev->reconfig_mutex); @@ -2457,9 +2453,11 @@ md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) if (!entry->show) return -EIO; - mddev_lock(mddev); - rv = entry->show(mddev, page); - mddev_unlock(mddev); + rv = mddev_lock(mddev); + if (!rv) { + rv = entry->show(mddev, page); + mddev_unlock(mddev); + } return rv; } @@ -2473,9 +2471,11 @@ md_attr_store(struct kobject *kobj, struct attribute *attr, if (!entry->store) return -EIO; - mddev_lock(mddev); - rv = entry->store(mddev, page, length); - mddev_unlock(mddev); + rv = mddev_lock(mddev); + if (!rv) { + rv = entry->store(mddev, page, length); + mddev_unlock(mddev); + } return rv; } @@ -4340,8 +4340,9 @@ static int md_seq_show(struct seq_file *seq, void *v) return 0; } - if (mddev_lock(mddev)!=0) + if (mddev_lock(mddev) < 0) return -EINTR; + if (mddev->pers || mddev->raid_disks || !list_empty(&mddev->disks)) { seq_printf(seq, "%s : %sactive", mdname(mddev), mddev->pers ? "" : "in"); |