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Merge branch 'for-linus' of git://neil.brown.name/md 

* 'for-linus' of git://neil.brown.name/md:
  md: allow extended partitions on md devices.
  md: use sysfs_notify_dirent to notify changes to md/dev-xxx/state
  md: use sysfs_notify_dirent to notify changes to md/array_state
This commit is contained in:
Linus Torvalds 2008-10-26 16:42:18 -07:00
parent 3d6eadcb50 92850bbd71
commit f8d56f1771
2 changed files with 40 additions and 24 deletions
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56
drivers/md/md.c
View File

@ -222,6 +222,9 @@ static void mddev_put(mddev_t *mddev)
list_del(&mddev->all_mddevs); list_del(&mddev->all_mddevs);
spin_unlock(&all_mddevs_lock); spin_unlock(&all_mddevs_lock);
blk_cleanup_queue(mddev->queue); blk_cleanup_queue(mddev->queue);
if (mddev->sysfs_state)
sysfs_put(mddev->sysfs_state);
mddev->sysfs_state = NULL;
kobject_put(&mddev->kobj); kobject_put(&mddev->kobj);
} else } else
spin_unlock(&all_mddevs_lock); spin_unlock(&all_mddevs_lock);
@ -1459,6 +1462,8 @@ static int bind_rdev_to_array(mdk_rdev_t * rdev, mddev_t * mddev)
kobject_del(&rdev->kobj); kobject_del(&rdev->kobj);
goto fail; goto fail;
} }
rdev->sysfs_state = sysfs_get_dirent(rdev->kobj.sd, "state");
list_add_rcu(&rdev->same_set, &mddev->disks); list_add_rcu(&rdev->same_set, &mddev->disks);
bd_claim_by_disk(rdev->bdev, rdev->bdev->bd_holder, mddev->gendisk); bd_claim_by_disk(rdev->bdev, rdev->bdev->bd_holder, mddev->gendisk);
return 0; return 0;
@ -1488,7 +1493,8 @@ static void unbind_rdev_from_array(mdk_rdev_t * rdev)
printk(KERN_INFO "md: unbind<%s>\n", bdevname(rdev->bdev,b)); printk(KERN_INFO "md: unbind<%s>\n", bdevname(rdev->bdev,b));
rdev->mddev = NULL; rdev->mddev = NULL;
sysfs_remove_link(&rdev->kobj, "block"); sysfs_remove_link(&rdev->kobj, "block");
sysfs_put(rdev->sysfs_state);
rdev->sysfs_state = NULL;
/* We need to delay this, otherwise we can deadlock when /* We need to delay this, otherwise we can deadlock when
* writing to 'remove' to "dev/state". We also need * writing to 'remove' to "dev/state". We also need
* to delay it due to rcu usage. * to delay it due to rcu usage.
@ -1923,8 +1929,8 @@ state_store(mdk_rdev_t *rdev, const char *buf, size_t len)
err = 0; err = 0;
} }
if (!err) if (!err && rdev->sysfs_state)
sysfs_notify(&rdev->kobj, NULL, "state"); sysfs_notify_dirent(rdev->sysfs_state);
return err ? err : len; return err ? err : len;
} }
static struct rdev_sysfs_entry rdev_state = static struct rdev_sysfs_entry rdev_state =
@ -2019,7 +2025,7 @@ slot_store(mdk_rdev_t *rdev, const char *buf, size_t len)
rdev->raid_disk = -1; rdev->raid_disk = -1;
return err; return err;
} else } else
sysfs_notify(&rdev->kobj, NULL, "state"); sysfs_notify_dirent(rdev->sysfs_state);
sprintf(nm, "rd%d", rdev->raid_disk); sprintf(nm, "rd%d", rdev->raid_disk);
if (sysfs_create_link(&rdev->mddev->kobj, &rdev->kobj, nm)) if (sysfs_create_link(&rdev->mddev->kobj, &rdev->kobj, nm))
printk(KERN_WARNING printk(KERN_WARNING
@ -2036,7 +2042,7 @@ slot_store(mdk_rdev_t *rdev, const char *buf, size_t len)
clear_bit(Faulty, &rdev->flags); clear_bit(Faulty, &rdev->flags);
clear_bit(WriteMostly, &rdev->flags); clear_bit(WriteMostly, &rdev->flags);
set_bit(In_sync, &rdev->flags); set_bit(In_sync, &rdev->flags);
sysfs_notify(&rdev->kobj, NULL, "state"); sysfs_notify_dirent(rdev->sysfs_state);
} }
return len; return len;
} }
@ -2770,7 +2776,7 @@ array_state_store(mddev_t *mddev, const char *buf, size_t len)
if (err) if (err)
return err; return err;
else { else {
sysfs_notify(&mddev->kobj, NULL, "array_state"); sysfs_notify_dirent(mddev->sysfs_state);
return len; return len;
} }
} }
@ -3457,6 +3463,11 @@ static struct kobject *md_probe(dev_t dev, int *part, void *data)
disk->fops = &md_fops; disk->fops = &md_fops;
disk->private_data = mddev; disk->private_data = mddev;
disk->queue = mddev->queue; disk->queue = mddev->queue;
/* Allow extended partitions. This makes the
* 'mdp' device redundant, but we can really
* remove it now.
*/
disk->flags |= GENHD_FL_EXT_DEVT;
add_disk(disk); add_disk(disk);
mddev->gendisk = disk; mddev->gendisk = disk;
error = kobject_init_and_add(&mddev->kobj, &md_ktype, error = kobject_init_and_add(&mddev->kobj, &md_ktype,
@ -3465,8 +3476,10 @@ static struct kobject *md_probe(dev_t dev, int *part, void *data)
if (error) if (error)
printk(KERN_WARNING "md: cannot register %s/md - name in use\n", printk(KERN_WARNING "md: cannot register %s/md - name in use\n",
disk->disk_name); disk->disk_name);
else else {
kobject_uevent(&mddev->kobj, KOBJ_ADD); kobject_uevent(&mddev->kobj, KOBJ_ADD);
mddev->sysfs_state = sysfs_get_dirent(mddev->kobj.sd, "array_state");
}
return NULL; return NULL;
} }
@ -3477,7 +3490,7 @@ static void md_safemode_timeout(unsigned long data)
if (!atomic_read(&mddev->writes_pending)) { if (!atomic_read(&mddev->writes_pending)) {
mddev->safemode = 1; mddev->safemode = 1;
if (mddev->external) if (mddev->external)
set_bit(MD_NOTIFY_ARRAY_STATE, &mddev->flags); sysfs_notify_dirent(mddev->sysfs_state);
} }
md_wakeup_thread(mddev->thread); md_wakeup_thread(mddev->thread);
} }
@ -3578,7 +3591,7 @@ static int do_md_run(mddev_t * mddev)
return -EINVAL; return -EINVAL;
} }
} }
sysfs_notify(&rdev->kobj, NULL, "state"); sysfs_notify_dirent(rdev->sysfs_state);
} }
md_probe(mddev->unit, NULL, NULL); md_probe(mddev->unit, NULL, NULL);
@ -3740,7 +3753,7 @@ static int do_md_run(mddev_t * mddev)
mddev->changed = 1; mddev->changed = 1;
md_new_event(mddev); md_new_event(mddev);
sysfs_notify(&mddev->kobj, NULL, "array_state"); sysfs_notify_dirent(mddev->sysfs_state);
sysfs_notify(&mddev->kobj, NULL, "sync_action"); sysfs_notify(&mddev->kobj, NULL, "sync_action");
sysfs_notify(&mddev->kobj, NULL, "degraded"); sysfs_notify(&mddev->kobj, NULL, "degraded");
kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE);
@ -3767,7 +3780,7 @@ static int restart_array(mddev_t *mddev)
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
md_wakeup_thread(mddev->thread); md_wakeup_thread(mddev->thread);
md_wakeup_thread(mddev->sync_thread); md_wakeup_thread(mddev->sync_thread);
sysfs_notify(&mddev->kobj, NULL, "array_state"); sysfs_notify_dirent(mddev->sysfs_state);
return 0; return 0;
} }
@ -3847,7 +3860,7 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open)
module_put(mddev->pers->owner); module_put(mddev->pers->owner);
mddev->pers = NULL; mddev->pers = NULL;
/* tell userspace to handle 'inactive' */ /* tell userspace to handle 'inactive' */
sysfs_notify(&mddev->kobj, NULL, "array_state"); sysfs_notify_dirent(mddev->sysfs_state);
set_capacity(disk, 0); set_capacity(disk, 0);
mddev->changed = 1; mddev->changed = 1;
@ -3933,7 +3946,7 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open)
mdname(mddev)); mdname(mddev));
err = 0; err = 0;
md_new_event(mddev); md_new_event(mddev);
sysfs_notify(&mddev->kobj, NULL, "array_state"); sysfs_notify_dirent(mddev->sysfs_state);
out: out:
return err; return err;
} }
@ -4297,7 +4310,7 @@ static int add_new_disk(mddev_t * mddev, mdu_disk_info_t *info)
if (err) if (err)
export_rdev(rdev); export_rdev(rdev);
else else
sysfs_notify(&rdev->kobj, NULL, "state"); sysfs_notify_dirent(rdev->sysfs_state);
md_update_sb(mddev, 1); md_update_sb(mddev, 1);
if (mddev->degraded) if (mddev->degraded)
@ -4938,7 +4951,7 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
if (_IOC_TYPE(cmd) == MD_MAJOR && mddev->ro && mddev->pers) { if (_IOC_TYPE(cmd) == MD_MAJOR && mddev->ro && mddev->pers) {
if (mddev->ro == 2) { if (mddev->ro == 2) {
mddev->ro = 0; mddev->ro = 0;
sysfs_notify(&mddev->kobj, NULL, "array_state"); sysfs_notify_dirent(mddev->sysfs_state);
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
md_wakeup_thread(mddev->thread); md_wakeup_thread(mddev->thread);
} else { } else {
@ -5612,7 +5625,7 @@ void md_write_start(mddev_t *mddev, struct bio *bi)
spin_unlock_irq(&mddev->write_lock); spin_unlock_irq(&mddev->write_lock);
} }
if (did_change) if (did_change)
sysfs_notify(&mddev->kobj, NULL, "array_state"); sysfs_notify_dirent(mddev->sysfs_state);
wait_event(mddev->sb_wait, wait_event(mddev->sb_wait,
!test_bit(MD_CHANGE_CLEAN, &mddev->flags) && !test_bit(MD_CHANGE_CLEAN, &mddev->flags) &&
!test_bit(MD_CHANGE_PENDING, &mddev->flags)); !test_bit(MD_CHANGE_PENDING, &mddev->flags));
@ -5655,7 +5668,7 @@ int md_allow_write(mddev_t *mddev)
mddev->safemode = 1; mddev->safemode = 1;
spin_unlock_irq(&mddev->write_lock); spin_unlock_irq(&mddev->write_lock);
md_update_sb(mddev, 0); md_update_sb(mddev, 0);
sysfs_notify(&mddev->kobj, NULL, "array_state"); sysfs_notify_dirent(mddev->sysfs_state);
} else } else
spin_unlock_irq(&mddev->write_lock); spin_unlock_irq(&mddev->write_lock);
@ -6048,9 +6061,6 @@ void md_check_recovery(mddev_t *mddev)
if (mddev->bitmap) if (mddev->bitmap)
bitmap_daemon_work(mddev->bitmap); bitmap_daemon_work(mddev->bitmap);
if (test_and_clear_bit(MD_NOTIFY_ARRAY_STATE, &mddev->flags))
sysfs_notify(&mddev->kobj, NULL, "array_state");
if (mddev->ro) if (mddev->ro)
return; return;
@ -6103,7 +6113,7 @@ void md_check_recovery(mddev_t *mddev)
mddev->safemode = 0; mddev->safemode = 0;
spin_unlock_irq(&mddev->write_lock); spin_unlock_irq(&mddev->write_lock);
if (did_change) if (did_change)
sysfs_notify(&mddev->kobj, NULL, "array_state"); sysfs_notify_dirent(mddev->sysfs_state);
} }
if (mddev->flags) if (mddev->flags)
@ -6111,7 +6121,7 @@ void md_check_recovery(mddev_t *mddev)
rdev_for_each(rdev, rtmp, mddev) rdev_for_each(rdev, rtmp, mddev)
if (test_and_clear_bit(StateChanged, &rdev->flags)) if (test_and_clear_bit(StateChanged, &rdev->flags))
sysfs_notify(&rdev->kobj, NULL, "state"); sysfs_notify_dirent(rdev->sysfs_state);
if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) &&
@ -6221,7 +6231,7 @@ void md_check_recovery(mddev_t *mddev)
void md_wait_for_blocked_rdev(mdk_rdev_t *rdev, mddev_t *mddev) void md_wait_for_blocked_rdev(mdk_rdev_t *rdev, mddev_t *mddev)
{ {
sysfs_notify(&rdev->kobj, NULL, "state"); sysfs_notify_dirent(rdev->sysfs_state);
wait_event_timeout(rdev->blocked_wait, wait_event_timeout(rdev->blocked_wait,
!test_bit(Blocked, &rdev->flags), !test_bit(Blocked, &rdev->flags),
msecs_to_jiffies(5000)); msecs_to_jiffies(5000));

8
include/linux/raid/md_k.h
View File

@ -115,6 +115,9 @@ struct mdk_rdev_s
* in superblock. * in superblock.
*/ */
struct work_struct del_work; /* used for delayed sysfs removal */ struct work_struct del_work; /* used for delayed sysfs removal */
struct sysfs_dirent *sysfs_state; /* handle for 'state'
* sysfs entry */
}; };
struct mddev_s struct mddev_s
@ -128,7 +131,6 @@ struct mddev_s
#define MD_CHANGE_DEVS 0 /* Some device status has changed */ #define MD_CHANGE_DEVS 0 /* Some device status has changed */
#define MD_CHANGE_CLEAN 1 /* transition to or from 'clean' */ #define MD_CHANGE_CLEAN 1 /* transition to or from 'clean' */
#define MD_CHANGE_PENDING 2 /* superblock update in progress */ #define MD_CHANGE_PENDING 2 /* superblock update in progress */
#define MD_NOTIFY_ARRAY_STATE 3 /* atomic context wants to notify userspace */
int ro; int ro;
@ -239,6 +241,10 @@ struct mddev_s
sector_t resync_max; /* resync should pause sector_t resync_max; /* resync should pause
* when it gets here */ * when it gets here */
struct sysfs_dirent *sysfs_state; /* handle for 'array_state'
* file in sysfs.
*/
spinlock_t write_lock; spinlock_t write_lock;
wait_queue_head_t sb_wait; /* for waiting on superblock updates */ wait_queue_head_t sb_wait; /* for waiting on superblock updates */
atomic_t pending_writes; /* number of active superblock writes */ atomic_t pending_writes; /* number of active superblock writes */