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Diffstat (limited to 'drivers/md/md.c')
-rw-r--r--drivers/md/md.c58
1 files changed, 34 insertions, 24 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 41e2509bf896..a307f87eb90e 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -214,12 +214,7 @@ static inline mddev_t *mddev_get(mddev_t *mddev)
return mddev;
}
-static void mddev_delayed_delete(struct work_struct *ws)
-{
- mddev_t *mddev = container_of(ws, mddev_t, del_work);
- kobject_del(&mddev->kobj);
- kobject_put(&mddev->kobj);
-}
+static void mddev_delayed_delete(struct work_struct *ws);
static void mddev_put(mddev_t *mddev)
{
@@ -474,7 +469,7 @@ void md_super_write(mddev_t *mddev, mdk_rdev_t *rdev,
* causes ENOTSUPP, we allocate a spare bio...
*/
struct bio *bio = bio_alloc(GFP_NOIO, 1);
- int rw = (1<<BIO_RW) | (1<<BIO_RW_SYNC);
+ int rw = (1<<BIO_RW) | (1<<BIO_RW_SYNCIO) | (1<<BIO_RW_UNPLUG);
bio->bi_bdev = rdev->bdev;
bio->bi_sector = sector;
@@ -531,7 +526,7 @@ int sync_page_io(struct block_device *bdev, sector_t sector, int size,
struct completion event;
int ret;
- rw |= (1 << BIO_RW_SYNC);
+ rw |= (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG);
bio->bi_bdev = bdev;
bio->bi_sector = sector;
@@ -1481,6 +1476,11 @@ static int bind_rdev_to_array(mdk_rdev_t * rdev, mddev_t * mddev)
if (find_rdev_nr(mddev, rdev->desc_nr))
return -EBUSY;
}
+ if (mddev->max_disks && rdev->desc_nr >= mddev->max_disks) {
+ printk(KERN_WARNING "md: %s: array is limited to %d devices\n",
+ mdname(mddev), mddev->max_disks);
+ return -EBUSY;
+ }
bdevname(rdev->bdev,b);
while ( (s=strchr(b, '/')) != NULL)
*s = '!';
@@ -2441,6 +2441,15 @@ static void analyze_sbs(mddev_t * mddev)
i = 0;
rdev_for_each(rdev, tmp, mddev) {
+ if (rdev->desc_nr >= mddev->max_disks ||
+ i > mddev->max_disks) {
+ printk(KERN_WARNING
+ "md: %s: %s: only %d devices permitted\n",
+ mdname(mddev), bdevname(rdev->bdev, b),
+ mddev->max_disks);
+ kick_rdev_from_array(rdev);
+ continue;
+ }
if (rdev != freshest)
if (super_types[mddev->major_version].
validate_super(mddev, rdev)) {
@@ -3528,6 +3537,21 @@ static struct kobj_type md_ktype = {
int mdp_major = 0;
+static void mddev_delayed_delete(struct work_struct *ws)
+{
+ mddev_t *mddev = container_of(ws, mddev_t, del_work);
+
+ if (mddev->private == &md_redundancy_group) {
+ sysfs_remove_group(&mddev->kobj, &md_redundancy_group);
+ if (mddev->sysfs_action)
+ sysfs_put(mddev->sysfs_action);
+ mddev->sysfs_action = NULL;
+ mddev->private = NULL;
+ }
+ kobject_del(&mddev->kobj);
+ kobject_put(&mddev->kobj);
+}
+
static int md_alloc(dev_t dev, char *name)
{
static DEFINE_MUTEX(disks_mutex);
@@ -4019,13 +4043,9 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open)
mddev->queue->merge_bvec_fn = NULL;
mddev->queue->unplug_fn = NULL;
mddev->queue->backing_dev_info.congested_fn = NULL;
- if (mddev->pers->sync_request) {
- sysfs_remove_group(&mddev->kobj, &md_redundancy_group);
- if (mddev->sysfs_action)
- sysfs_put(mddev->sysfs_action);
- mddev->sysfs_action = NULL;
- }
module_put(mddev->pers->owner);
+ if (mddev->pers->sync_request)
+ mddev->private = &md_redundancy_group;
mddev->pers = NULL;
/* tell userspace to handle 'inactive' */
sysfs_notify_dirent(mddev->sysfs_state);
@@ -4614,13 +4634,6 @@ static int hot_add_disk(mddev_t * mddev, dev_t dev)
* noticed in interrupt contexts ...
*/
- if (rdev->desc_nr == mddev->max_disks) {
- printk(KERN_WARNING "%s: can not hot-add to full array!\n",
- mdname(mddev));
- err = -EBUSY;
- goto abort_unbind_export;
- }
-
rdev->raid_disk = -1;
md_update_sb(mddev, 1);
@@ -4634,9 +4647,6 @@ static int hot_add_disk(mddev_t * mddev, dev_t dev)
md_new_event(mddev);
return 0;
-abort_unbind_export:
- unbind_rdev_from_array(rdev);
-
abort_export:
export_rdev(rdev);
return err;