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author | Neil Brown <neilb@notabene.brown> | 2008-07-08 10:13:28 +1000 |
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committer | Neil Brown <neilb@notabene.brown> | 2008-07-08 10:13:28 +1000 |
commit | 0529613a1970fef1ba82ded431e2e2ee35b658af (patch) | |
tree | 63d9e89424fa5fe9aef6bf0b6f0ab63f4fe886be /drivers | |
parent | 5b1a4bf220a8f6f2650fdfdfebfda0f22f674d97 (diff) | |
parent | b5470dc5fc18a8ff6517c3bb538d1479e58ecb02 (diff) | |
download | linux-stable-0529613a1970fef1ba82ded431e2e2ee35b658af.tar.gz linux-stable-0529613a1970fef1ba82ded431e2e2ee35b658af.tar.bz2 linux-stable-0529613a1970fef1ba82ded431e2e2ee35b658af.zip |
Merge branch 'for-neil' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/md into for-next
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/md/md.c | 27 | ||||
-rw-r--r-- | drivers/md/raid1.c | 6 | ||||
-rw-r--r-- | drivers/md/raid5.c | 12 |
3 files changed, 29 insertions, 16 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index df1230af02cd..43d033d9a05a 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -4172,9 +4172,11 @@ static int get_bitmap_file(mddev_t * mddev, void __user * arg) char *ptr, *buf = NULL; int err = -ENOMEM; - md_allow_write(mddev); + if (md_allow_write(mddev)) + file = kmalloc(sizeof(*file), GFP_NOIO); + else + file = kmalloc(sizeof(*file), GFP_KERNEL); - file = kmalloc(sizeof(*file), GFP_KERNEL); if (!file) goto out; @@ -5667,15 +5669,18 @@ void md_write_end(mddev_t *mddev) * may proceed without blocking. It is important to call this before * attempting a GFP_KERNEL allocation while holding the mddev lock. * Must be called with mddev_lock held. + * + * In the ->external case MD_CHANGE_CLEAN can not be cleared until mddev->lock + * is dropped, so return -EAGAIN after notifying userspace. */ -void md_allow_write(mddev_t *mddev) +int md_allow_write(mddev_t *mddev) { if (!mddev->pers) - return; + return 0; if (mddev->ro) - return; + return 0; if (!mddev->pers->sync_request) - return; + return 0; spin_lock_irq(&mddev->write_lock); if (mddev->in_sync) { @@ -5686,14 +5691,14 @@ void md_allow_write(mddev_t *mddev) mddev->safemode = 1; spin_unlock_irq(&mddev->write_lock); md_update_sb(mddev, 0); - sysfs_notify(&mddev->kobj, NULL, "array_state"); - /* wait for the dirty state to be recorded in the metadata */ - wait_event(mddev->sb_wait, - !test_bit(MD_CHANGE_CLEAN, &mddev->flags) && - !test_bit(MD_CHANGE_PENDING, &mddev->flags)); } else spin_unlock_irq(&mddev->write_lock); + + if (test_bit(MD_CHANGE_CLEAN, &mddev->flags)) + return -EAGAIN; + else + return 0; } EXPORT_SYMBOL_GPL(md_allow_write); diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index f05d5983efb6..491dc2d4ad5f 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -2136,7 +2136,7 @@ static int raid1_reshape(mddev_t *mddev) conf_t *conf = mddev_to_conf(mddev); int cnt, raid_disks; unsigned long flags; - int d, d2; + int d, d2, err; /* Cannot change chunk_size, layout, or level */ if (mddev->chunk_size != mddev->new_chunk || @@ -2148,7 +2148,9 @@ static int raid1_reshape(mddev_t *mddev) return -EINVAL; } - md_allow_write(mddev); + err = md_allow_write(mddev); + if (err) + return err; raid_disks = mddev->raid_disks + mddev->delta_disks; diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 442622067cae..8f4c70a53210 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -911,14 +911,16 @@ static int resize_stripes(raid5_conf_t *conf, int newsize) struct stripe_head *osh, *nsh; LIST_HEAD(newstripes); struct disk_info *ndisks; - int err = 0; + int err; struct kmem_cache *sc; int i; if (newsize <= conf->pool_size) return 0; /* never bother to shrink */ - md_allow_write(conf->mddev); + err = md_allow_write(conf->mddev); + if (err) + return err; /* Step 1 */ sc = kmem_cache_create(conf->cache_name[1-conf->active_name], @@ -3843,6 +3845,8 @@ raid5_store_stripe_cache_size(mddev_t *mddev, const char *page, size_t len) { raid5_conf_t *conf = mddev_to_conf(mddev); unsigned long new; + int err; + if (len >= PAGE_SIZE) return -EINVAL; if (!conf) @@ -3858,7 +3862,9 @@ raid5_store_stripe_cache_size(mddev_t *mddev, const char *page, size_t len) else break; } - md_allow_write(mddev); + err = md_allow_write(mddev); + if (err) + return err; while (new > conf->max_nr_stripes) { if (grow_one_stripe(conf)) conf->max_nr_stripes++; |