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-rw-r--r--drivers/md/bcache/alloc.c35
-rw-r--r--drivers/md/bcache/bcache.h5
-rw-r--r--drivers/md/bcache/btree.c21
-rw-r--r--drivers/md/bcache/request.c6
-rw-r--r--drivers/md/bcache/super.c26
-rw-r--r--drivers/md/bcache/sysfs.c2
-rw-r--r--drivers/md/dm-bufio.c10
-rw-r--r--drivers/md/dm-cache-metadata.c54
-rw-r--r--drivers/md/dm-cache-policy-smq.c28
-rw-r--r--drivers/md/dm-cache-target.c15
-rw-r--r--drivers/md/dm-core.h4
-rw-r--r--drivers/md/dm-crypt.c25
-rw-r--r--drivers/md/dm-delay.c17
-rw-r--r--drivers/md/dm-era-target.c101
-rw-r--r--drivers/md/dm-flakey.c34
-rw-r--r--drivers/md/dm-integrity.c119
-rw-r--r--drivers/md/dm-io.c2
-rw-r--r--drivers/md/dm-ioctl.c18
-rw-r--r--drivers/md/dm-raid.c81
-rw-r--r--drivers/md/dm-rq.c2
-rw-r--r--drivers/md/dm-snap-persistent.c2
-rw-r--r--drivers/md/dm-snap.c27
-rw-r--r--drivers/md/dm-stats.c15
-rw-r--r--drivers/md/dm-stats.h2
-rw-r--r--drivers/md/dm-table.c197
-rw-r--r--drivers/md/dm-thin-metadata.c11
-rw-r--r--drivers/md/dm-thin.c22
-rw-r--r--drivers/md/dm-verity-fec.c31
-rw-r--r--drivers/md/dm-verity-fec.h1
-rw-r--r--drivers/md/dm-verity-target.c34
-rw-r--r--drivers/md/dm-verity.h6
-rw-r--r--drivers/md/dm-writecache.c56
-rw-r--r--drivers/md/dm.c93
-rw-r--r--drivers/md/md-bitmap.c112
-rw-r--r--drivers/md/md-cluster.c67
-rw-r--r--drivers/md/md.c170
-rw-r--r--drivers/md/persistent-data/dm-block-manager.c14
-rw-r--r--drivers/md/persistent-data/dm-btree-internal.h4
-rw-r--r--drivers/md/persistent-data/dm-btree-remove.c5
-rw-r--r--drivers/md/persistent-data/dm-btree.c8
-rw-r--r--drivers/md/persistent-data/dm-space-map-common.c7
-rw-r--r--drivers/md/persistent-data/dm-space-map-common.h8
-rw-r--r--drivers/md/persistent-data/dm-space-map-disk.c9
-rw-r--r--drivers/md/persistent-data/dm-space-map-metadata.c9
-rw-r--r--drivers/md/raid0.c97
-rw-r--r--drivers/md/raid0.h1
-rw-r--r--drivers/md/raid1.c6
-rw-r--r--drivers/md/raid10.c128
-rw-r--r--drivers/md/raid5.c33
49 files changed, 1191 insertions, 589 deletions
diff --git a/drivers/md/bcache/alloc.c b/drivers/md/bcache/alloc.c
index 46794cac167e..5310e1f4a282 100644
--- a/drivers/md/bcache/alloc.c
+++ b/drivers/md/bcache/alloc.c
@@ -49,7 +49,7 @@
*
* bch_bucket_alloc() allocates a single bucket from a specific cache.
*
- * bch_bucket_alloc_set() allocates one or more buckets from different caches
+ * bch_bucket_alloc_set() allocates one bucket from different caches
* out of a cache set.
*
* free_some_buckets() drives all the processes described above. It's called
@@ -488,34 +488,29 @@ void bch_bucket_free(struct cache_set *c, struct bkey *k)
}
int __bch_bucket_alloc_set(struct cache_set *c, unsigned int reserve,
- struct bkey *k, int n, bool wait)
+ struct bkey *k, bool wait)
{
- int i;
+ struct cache *ca;
+ long b;
/* No allocation if CACHE_SET_IO_DISABLE bit is set */
if (unlikely(test_bit(CACHE_SET_IO_DISABLE, &c->flags)))
return -1;
lockdep_assert_held(&c->bucket_lock);
- BUG_ON(!n || n > c->caches_loaded || n > 8);
bkey_init(k);
- /* sort by free space/prio of oldest data in caches */
-
- for (i = 0; i < n; i++) {
- struct cache *ca = c->cache_by_alloc[i];
- long b = bch_bucket_alloc(ca, reserve, wait);
+ ca = c->cache_by_alloc[0];
+ b = bch_bucket_alloc(ca, reserve, wait);
+ if (b == -1)
+ goto err;
- if (b == -1)
- goto err;
+ k->ptr[0] = MAKE_PTR(ca->buckets[b].gen,
+ bucket_to_sector(c, b),
+ ca->sb.nr_this_dev);
- k->ptr[i] = MAKE_PTR(ca->buckets[b].gen,
- bucket_to_sector(c, b),
- ca->sb.nr_this_dev);
-
- SET_KEY_PTRS(k, i + 1);
- }
+ SET_KEY_PTRS(k, 1);
return 0;
err:
@@ -525,12 +520,12 @@ err:
}
int bch_bucket_alloc_set(struct cache_set *c, unsigned int reserve,
- struct bkey *k, int n, bool wait)
+ struct bkey *k, bool wait)
{
int ret;
mutex_lock(&c->bucket_lock);
- ret = __bch_bucket_alloc_set(c, reserve, k, n, wait);
+ ret = __bch_bucket_alloc_set(c, reserve, k, wait);
mutex_unlock(&c->bucket_lock);
return ret;
}
@@ -638,7 +633,7 @@ bool bch_alloc_sectors(struct cache_set *c,
spin_unlock(&c->data_bucket_lock);
- if (bch_bucket_alloc_set(c, watermark, &alloc.key, 1, wait))
+ if (bch_bucket_alloc_set(c, watermark, &alloc.key, wait))
return false;
spin_lock(&c->data_bucket_lock);
diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h
index 6a380ed4919a..d0311e3065ca 100644
--- a/drivers/md/bcache/bcache.h
+++ b/drivers/md/bcache/bcache.h
@@ -265,6 +265,7 @@ struct bcache_device {
#define BCACHE_DEV_WB_RUNNING 3
#define BCACHE_DEV_RATE_DW_RUNNING 4
int nr_stripes;
+#define BCH_MIN_STRIPE_SZ ((4 << 20) >> SECTOR_SHIFT)
unsigned int stripe_size;
atomic_t *stripe_sectors_dirty;
unsigned long *full_dirty_stripes;
@@ -952,9 +953,9 @@ void bch_bucket_free(struct cache_set *c, struct bkey *k);
long bch_bucket_alloc(struct cache *ca, unsigned int reserve, bool wait);
int __bch_bucket_alloc_set(struct cache_set *c, unsigned int reserve,
- struct bkey *k, int n, bool wait);
+ struct bkey *k, bool wait);
int bch_bucket_alloc_set(struct cache_set *c, unsigned int reserve,
- struct bkey *k, int n, bool wait);
+ struct bkey *k, bool wait);
bool bch_alloc_sectors(struct cache_set *c, struct bkey *k,
unsigned int sectors, unsigned int write_point,
unsigned int write_prio, bool wait);
diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
index e388e7bb7b5d..de1eb7961fe6 100644
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -1008,6 +1008,9 @@ err:
*
* The btree node will have either a read or a write lock held, depending on
* level and op->lock.
+ *
+ * Note: Only error code or btree pointer will be returned, it is unncessary
+ * for callers to check NULL pointer.
*/
struct btree *bch_btree_node_get(struct cache_set *c, struct btree_op *op,
struct bkey *k, int level, bool write,
@@ -1120,16 +1123,22 @@ retry:
mutex_unlock(&b->c->bucket_lock);
}
+/*
+ * Only error code or btree pointer will be returned, it is unncessary for
+ * callers to check NULL pointer.
+ */
struct btree *__bch_btree_node_alloc(struct cache_set *c, struct btree_op *op,
int level, bool wait,
struct btree *parent)
{
BKEY_PADDED(key) k;
- struct btree *b = ERR_PTR(-EAGAIN);
+ struct btree *b;
mutex_lock(&c->bucket_lock);
retry:
- if (__bch_bucket_alloc_set(c, RESERVE_BTREE, &k.key, 1, wait))
+ /* return ERR_PTR(-EAGAIN) when it fails */
+ b = ERR_PTR(-EAGAIN);
+ if (__bch_bucket_alloc_set(c, RESERVE_BTREE, &k.key, wait))
goto err;
bkey_put(c, &k.key);
@@ -1174,7 +1183,7 @@ static struct btree *btree_node_alloc_replacement(struct btree *b,
{
struct btree *n = bch_btree_node_alloc(b->c, op, b->level, b->parent);
- if (!IS_ERR_OR_NULL(n)) {
+ if (!IS_ERR(n)) {
mutex_lock(&n->write_lock);
bch_btree_sort_into(&b->keys, &n->keys, &b->c->sort);
bkey_copy_key(&n->key, &b->key);
@@ -1389,7 +1398,7 @@ static int btree_gc_coalesce(struct btree *b, struct btree_op *op,
for (i = 0; i < nodes; i++) {
new_nodes[i] = btree_node_alloc_replacement(r[i].b, NULL);
- if (IS_ERR_OR_NULL(new_nodes[i]))
+ if (IS_ERR(new_nodes[i]))
goto out_nocoalesce;
}
@@ -1541,6 +1550,8 @@ static int btree_gc_rewrite_node(struct btree *b, struct btree_op *op,
return 0;
n = btree_node_alloc_replacement(replace, NULL);
+ if (IS_ERR(n))
+ return 0;
/* recheck reserve after allocating replacement node */
if (btree_check_reserve(b, NULL)) {
@@ -1706,7 +1717,7 @@ static int bch_btree_gc_root(struct btree *b, struct btree_op *op,
if (should_rewrite) {
n = btree_node_alloc_replacement(b, NULL);
- if (!IS_ERR_OR_NULL(n)) {
+ if (!IS_ERR(n)) {
bch_btree_node_write_sync(n);
bch_btree_set_root(n);
diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
index c1e487d1261c..958c3a1c453a 100644
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -1102,6 +1102,12 @@ static void detached_dev_do_request(struct bcache_device *d, struct bio *bio)
* which would call closure_get(&dc->disk.cl)
*/
ddip = kzalloc(sizeof(struct detached_dev_io_private), GFP_NOIO);
+ if (!ddip) {
+ bio->bi_status = BLK_STS_RESOURCE;
+ bio->bi_end_io(bio);
+ return;
+ }
+
ddip->d = d;
ddip->start_time = jiffies;
ddip->bi_end_io = bio->bi_end_io;
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 7787ec42f81e..70f0f3096bee 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -423,7 +423,7 @@ static int __uuid_write(struct cache_set *c)
closure_init_stack(&cl);
lockdep_assert_held(&bch_register_lock);
- if (bch_bucket_alloc_set(c, RESERVE_BTREE, &k.key, 1, true))
+ if (bch_bucket_alloc_set(c, RESERVE_BTREE, &k.key, true))
return 1;
SET_KEY_SIZE(&k.key, c->sb.bucket_size);
@@ -807,6 +807,8 @@ static int bcache_device_init(struct bcache_device *d, unsigned int block_size,
if (!d->stripe_size)
d->stripe_size = 1 << 31;
+ else if (d->stripe_size < BCH_MIN_STRIPE_SZ)
+ d->stripe_size = roundup(BCH_MIN_STRIPE_SZ, d->stripe_size);
d->nr_stripes = DIV_ROUND_UP_ULL(sectors, d->stripe_size);
@@ -824,20 +826,20 @@ static int bcache_device_init(struct bcache_device *d, unsigned int block_size,
n = BITS_TO_LONGS(d->nr_stripes) * sizeof(unsigned long);
d->full_dirty_stripes = kvzalloc(n, GFP_KERNEL);
if (!d->full_dirty_stripes)
- return -ENOMEM;
+ goto out_free_stripe_sectors_dirty;
idx = ida_simple_get(&bcache_device_idx, 0,
BCACHE_DEVICE_IDX_MAX, GFP_KERNEL);
if (idx < 0)
- return idx;
+ goto out_free_full_dirty_stripes;
if (bioset_init(&d->bio_split, 4, offsetof(struct bbio, bio),
BIOSET_NEED_BVECS|BIOSET_NEED_RESCUER))
- goto err;
+ goto out_ida_remove;
d->disk = alloc_disk(BCACHE_MINORS);
if (!d->disk)
- goto err;
+ goto out_bioset_exit;
set_capacity(d->disk, sectors);
snprintf(d->disk->disk_name, DISK_NAME_LEN, "bcache%i", idx);
@@ -872,8 +874,14 @@ static int bcache_device_init(struct bcache_device *d, unsigned int block_size,
return 0;
-err:
+out_bioset_exit:
+ bioset_exit(&d->bio_split);
+out_ida_remove:
ida_simple_remove(&bcache_device_idx, idx);
+out_free_full_dirty_stripes:
+ kvfree(d->full_dirty_stripes);
+out_free_stripe_sectors_dirty:
+ kvfree(d->stripe_sectors_dirty);
return -ENOMEM;
}
@@ -1570,7 +1578,7 @@ static void cache_set_flush(struct closure *cl)
if (!IS_ERR_OR_NULL(c->gc_thread))
kthread_stop(c->gc_thread);
- if (!IS_ERR_OR_NULL(c->root))
+ if (!IS_ERR(c->root))
list_add(&c->root->list, &c->btree_cache);
/* Should skip this if we're unregistering because of an error */
@@ -1838,7 +1846,7 @@ static int run_cache_set(struct cache_set *c)
c->root = bch_btree_node_get(c, NULL, k,
j->btree_level,
true, NULL);
- if (IS_ERR_OR_NULL(c->root))
+ if (IS_ERR(c->root))
goto err;
list_del_init(&c->root->list);
@@ -1915,7 +1923,7 @@ static int run_cache_set(struct cache_set *c)
err = "cannot allocate new btree root";
c->root = __bch_btree_node_alloc(c, NULL, 0, true, NULL);
- if (IS_ERR_OR_NULL(c->root))
+ if (IS_ERR(c->root))
goto err;
mutex_lock(&c->root->write_lock);
diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c
index 591d9c8107dd..64a72222a58c 100644
--- a/drivers/md/bcache/sysfs.c
+++ b/drivers/md/bcache/sysfs.c
@@ -992,7 +992,7 @@ SHOW(__bch_cache)
sum += INITIAL_PRIO - cached[i];
if (n)
- do_div(sum, n);
+ sum = div64_u64(sum, n);
for (i = 0; i < ARRAY_SIZE(q); i++)
q[i] = INITIAL_PRIO - cached[n * (i + 1) /
diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c
index dc385b70e4c3..b3b799f84dcc 100644
--- a/drivers/md/dm-bufio.c
+++ b/drivers/md/dm-bufio.c
@@ -1463,6 +1463,10 @@ EXPORT_SYMBOL_GPL(dm_bufio_get_block_size);
sector_t dm_bufio_get_device_size(struct dm_bufio_client *c)
{
sector_t s = i_size_read(c->bdev->bd_inode) >> SECTOR_SHIFT;
+ if (s >= c->start)
+ s -= c->start;
+ else
+ s = 0;
if (likely(c->sectors_per_block_bits >= 0))
s >>= c->sectors_per_block_bits;
else
@@ -1471,6 +1475,12 @@ sector_t dm_bufio_get_device_size(struct dm_bufio_client *c)
}
EXPORT_SYMBOL_GPL(dm_bufio_get_device_size);
+struct dm_io_client *dm_bufio_get_dm_io_client(struct dm_bufio_client *c)
+{
+ return c->dm_io;
+}
+EXPORT_SYMBOL_GPL(dm_bufio_get_dm_io_client);
+
sector_t dm_bufio_get_block_number(struct dm_buffer *b)
{
return b->block;
diff --git a/drivers/md/dm-cache-metadata.c b/drivers/md/dm-cache-metadata.c
index af6d4f898e4c..2ecd0db0f294 100644
--- a/drivers/md/dm-cache-metadata.c
+++ b/drivers/md/dm-cache-metadata.c
@@ -551,11 +551,13 @@ static int __create_persistent_data_objects(struct dm_cache_metadata *cmd,
return r;
}
-static void __destroy_persistent_data_objects(struct dm_cache_metadata *cmd)
+static void __destroy_persistent_data_objects(struct dm_cache_metadata *cmd,
+ bool destroy_bm)
{
dm_sm_destroy(cmd->metadata_sm);
dm_tm_destroy(cmd->tm);
- dm_block_manager_destroy(cmd->bm);
+ if (destroy_bm)
+ dm_block_manager_destroy(cmd->bm);
}
typedef unsigned long (*flags_mutator)(unsigned long);
@@ -826,7 +828,7 @@ static struct dm_cache_metadata *lookup_or_open(struct block_device *bdev,
cmd2 = lookup(bdev);
if (cmd2) {
mutex_unlock(&table_lock);
- __destroy_persistent_data_objects(cmd);
+ __destroy_persistent_data_objects(cmd, true);
kfree(cmd);
return cmd2;
}
@@ -874,7 +876,7 @@ void dm_cache_metadata_close(struct dm_cache_metadata *cmd)
mutex_unlock(&table_lock);
if (!cmd->fail_io)
- __destroy_persistent_data_objects(cmd);
+ __destroy_persistent_data_objects(cmd, true);
kfree(cmd);
}
}
@@ -1808,14 +1810,52 @@ int dm_cache_metadata_needs_check(struct dm_cache_metadata *cmd, bool *result)
int dm_cache_metadata_abort(struct dm_cache_metadata *cmd)
{
- int r;
+ int r = -EINVAL;
+ struct dm_block_manager *old_bm = NULL, *new_bm = NULL;
+
+ /* fail_io is double-checked with cmd->root_lock held below */
+ if (unlikely(cmd->fail_io))
+ return r;
+
+ /*
+ * Replacement block manager (new_bm) is created and old_bm destroyed outside of
+ * cmd root_lock to avoid ABBA deadlock that would result (due to life-cycle of
+ * shrinker associated with the block manager's bufio client vs cmd root_lock).
+ * - must take shrinker_rwsem without holding cmd->root_lock
+ */
+ new_bm = dm_block_manager_create(cmd->bdev, DM_CACHE_METADATA_BLOCK_SIZE << SECTOR_SHIFT,
+ CACHE_MAX_CONCURRENT_LOCKS);
WRITE_LOCK(cmd);
- __destroy_persistent_data_objects(cmd);
- r = __create_persistent_data_objects(cmd, false);
+ if (cmd->fail_io) {
+ WRITE_UNLOCK(cmd);
+ goto out;
+ }
+
+ __destroy_persistent_data_objects(cmd, false);
+ old_bm = cmd->bm;
+ if (IS_ERR(new_bm)) {
+ DMERR("could not create block manager during abort");
+ cmd->bm = NULL;
+ r = PTR_ERR(new_bm);
+ goto out_unlock;
+ }
+
+ cmd->bm = new_bm;
+ r = __open_or_format_metadata(cmd, false);
+ if (r) {
+ cmd->bm = NULL;
+ goto out_unlock;
+ }
+ new_bm = NULL;
+out_unlock:
if (r)
cmd->fail_io = true;
WRITE_UNLOCK(cmd);
+ dm_block_manager_destroy(old_bm);
+out:
+ if (new_bm && !IS_ERR(new_bm))
+ dm_block_manager_destroy(new_bm);
return r;
}
diff --git a/drivers/md/dm-cache-policy-smq.c b/drivers/md/dm-cache-policy-smq.c
index 1b5b9ad9e492..6030193b216e 100644
--- a/drivers/md/dm-cache-policy-smq.c
+++ b/drivers/md/dm-cache-policy-smq.c
@@ -854,7 +854,13 @@ struct smq_policy {
struct background_tracker *bg_work;
- bool migrations_allowed;
+ bool migrations_allowed:1;
+
+ /*
+ * If this is set the policy will try and clean the whole cache
+ * even if the device is not idle.
+ */
+ bool cleaner:1;
};
/*----------------------------------------------------------------*/
@@ -1133,7 +1139,7 @@ static bool clean_target_met(struct smq_policy *mq, bool idle)
* Cache entries may not be populated. So we cannot rely on the
* size of the clean queue.
*/
- if (idle) {
+ if (idle || mq->cleaner) {
/*
* We'd like to clean everything.
*/
@@ -1716,11 +1722,9 @@ static void calc_hotspot_params(sector_t origin_size,
*hotspot_block_size /= 2u;
}
-static struct dm_cache_policy *__smq_create(dm_cblock_t cache_size,
- sector_t origin_size,
- sector_t cache_block_size,
- bool mimic_mq,
- bool migrations_allowed)
+static struct dm_cache_policy *
+__smq_create(dm_cblock_t cache_size, sector_t origin_size, sector_t cache_block_size,
+ bool mimic_mq, bool migrations_allowed, bool cleaner)
{
unsigned i;
unsigned nr_sentinels_per_queue = 2u * NR_CACHE_LEVELS;
@@ -1807,6 +1811,7 @@ static struct dm_cache_policy *__smq_create(dm_cblock_t cache_size,
goto bad_btracker;
mq->migrations_allowed = migrations_allowed;
+ mq->cleaner = cleaner;
return &mq->policy;
@@ -1830,21 +1835,24 @@ static struct dm_cache_policy *smq_create(dm_cblock_t cache_size,
sector_t origin_size,
sector_t cache_block_size)
{
- return __smq_create(cache_size, origin_size, cache_block_size, false, true);
+ return __smq_create(cache_size, origin_size, cache_block_size,
+ false, true, false);
}
static struct dm_cache_policy *mq_create(dm_cblock_t cache_size,
sector_t origin_size,
sector_t cache_block_size)
{
- return __smq_create(cache_size, origin_size, cache_block_size, true, true);
+ return __smq_create(cache_size, origin_size, cache_block_size,
+ true, true, false);
}
static struct dm_cache_policy *cleaner_create(dm_cblock_t cache_size,
sector_t origin_size,
sector_t cache_block_size)
{
- return __smq_create(cache_size, origin_size, cache_block_size, false, false);
+ return __smq_create(cache_size, origin_size, cache_block_size,
+ false, false, true);
}
/*----------------------------------------------------------------*/
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c
index 2ddd575e97f7..b3371812a215 100644
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -1010,16 +1010,16 @@ static void abort_transaction(struct cache *cache)
if (get_cache_mode(cache) >= CM_READ_ONLY)
return;
- if (dm_cache_metadata_set_needs_check(cache->cmd)) {
- DMERR("%s: failed to set 'needs_check' flag in metadata", dev_name);
- set_cache_mode(cache, CM_FAIL);
- }
-
DMERR_LIMIT("%s: aborting current metadata transaction", dev_name);
if (dm_cache_metadata_abort(cache->cmd)) {
DMERR("%s: failed to abort metadata transaction", dev_name);
set_cache_mode(cache, CM_FAIL);
}
+
+ if (dm_cache_metadata_set_needs_check(cache->cmd)) {
+ DMERR("%s: failed to set 'needs_check' flag in metadata", dev_name);
+ set_cache_mode(cache, CM_FAIL);
+ }
}
static void metadata_operation_failed(struct cache *cache, const char *op, int r)
@@ -1905,6 +1905,7 @@ static void process_deferred_bios(struct work_struct *ws)
else
commit_needed = process_bio(cache, bio) || commit_needed;
+ cond_resched();
}
if (commit_needed)
@@ -1927,6 +1928,7 @@ static void requeue_deferred_bios(struct cache *cache)
while ((bio = bio_list_pop(&bios))) {
bio->bi_status = BLK_STS_DM_REQUEUE;
bio_endio(bio);
+ cond_resched();
}
}
@@ -1967,6 +1969,8 @@ static void check_migrations(struct work_struct *ws)
r = mg_start(cache, op, NULL);
if (r)
break;
+
+ cond_resched();
}
}
@@ -1987,6 +1991,7 @@ static void destroy(struct cache *cache)
if (cache->prison)
dm_bio_prison_destroy_v2(cache->prison);
+ cancel_delayed_work_sync(&cache->waker);
if (cache->wq)
destroy_workqueue(cache->wq);
diff --git a/drivers/md/dm-core.h b/drivers/md/dm-core.h
index 7e426e4d1352..8cda3f7ddbae 100644
--- a/drivers/md/dm-core.h
+++ b/drivers/md/dm-core.h
@@ -110,6 +110,10 @@ struct mapped_device {
/* zero-length flush that will be cloned and submitted to targets */
struct bio flush_bio;
+ int swap_bios;
+ struct semaphore swap_bios_semaphore;
+ struct mutex swap_bios_lock;
+
struct dm_stats stats;
struct kthread_worker kworker;
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 07661c3c1513..908bf0768827 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1661,6 +1661,7 @@ pop_from_list:
io = crypt_io_from_node(rb_first(&write_tree));
rb_erase(&io->rb_node, &write_tree);
kcryptd_io_write(io);
+ cond_resched();
} while (!RB_EMPTY_ROOT(&write_tree));
blk_finish_plug(&plug);
}
@@ -2107,7 +2108,7 @@ static int crypt_set_keyring_key(struct crypt_config *cc, const char *key_string
static int get_key_size(char **key_string)
{
- return (*key_string[0] == ':') ? -EINVAL : strlen(*key_string) >> 1;
+ return (*key_string[0] == ':') ? -EINVAL : (int)(strlen(*key_string) >> 1);
}
#endif
@@ -2181,7 +2182,12 @@ static void *crypt_page_alloc(gfp_t gfp_mask, void *pool_data)
struct crypt_config *cc = pool_data;
struct page *page;
- if (unlikely(percpu_counter_compare(&cc->n_allocated_pages, dm_crypt_pages_per_client) >= 0) &&
+ /*
+ * Note, percpu_counter_read_positive() may over (and under) estimate
+ * the current usage by at most (batch - 1) * num_online_cpus() pages,
+ * but avoids potential spinlock contention of an exact result.
+ */
+ if (unlikely(percpu_counter_read_positive(&cc->n_allocated_pages) >= dm_crypt_pages_per_client) &&
likely(gfp_mask & __GFP_NORETRY))
return NULL;
@@ -2852,6 +2858,7 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv)
wake_up_process(cc->write_thread);
ti->num_flush_bios = 1;
+ ti->limit_swap_bios = true;
return 0;
@@ -2926,6 +2933,11 @@ static int crypt_map(struct dm_target *ti, struct bio *bio)
return DM_MAPIO_SUBMITTED;
}
+static char hex2asc(unsigned char c)
+{
+ return c + '0' + ((unsigned)(9 - c) >> 4 & 0x27);
+}
+
static void crypt_status(struct dm_target *ti, status_type_t type,
unsigned status_flags, char *result, unsigned maxlen)
{
@@ -2944,9 +2956,12 @@ static void crypt_status(struct dm_target *ti, status_type_t type,
if (cc->key_size > 0) {
if (cc->key_string)
DMEMIT(":%u:%s", cc->key_size, cc->key_string);
- else
- for (i = 0; i < cc->key_size; i++)
- DMEMIT("%02x", cc->key[i]);
+ else {
+ for (i = 0; i < cc->key_size; i++) {
+ DMEMIT("%c%c", hex2asc(cc->key[i] >> 4),
+ hex2asc(cc->key[i] & 0xf));
+ }
+ }
} else
DMEMIT("-");
diff --git a/drivers/md/dm-delay.c b/drivers/md/dm-delay.c
index f496213f8b67..7c0e7c662e07 100644
--- a/drivers/md/dm-delay.c
+++ b/drivers/md/dm-delay.c
@@ -30,7 +30,7 @@ struct delay_c {
struct workqueue_struct *kdelayd_wq;
struct work_struct flush_expired_bios;
struct list_head delayed_bios;
- atomic_t may_delay;
+ bool may_delay;
struct delay_class read;
struct delay_class write;
@@ -191,7 +191,7 @@ static int delay_ctr(struct dm_target *ti, unsigned int argc, char **argv)
INIT_WORK(&dc->flush_expired_bios, flush_expired_bios);
INIT_LIST_HEAD(&dc->delayed_bios);
mutex_init(&dc->timer_lock);
- atomic_set(&dc->may_delay, 1);
+ dc->may_delay = true;
dc->argc = argc;
ret = delay_class_ctr(ti, &dc->read, argv);
@@ -245,7 +245,7 @@ static int delay_bio(struct delay_c *dc, struct delay_class *c, struct bio *bio)
struct dm_delay_info *delayed;
unsigned long expires = 0;
- if (!c->delay || !atomic_read(&dc->may_delay))
+ if (!c->delay)
return DM_MAPIO_REMAPPED;
delayed = dm_per_bio_data(bio, sizeof(struct dm_delay_info));
@@ -254,6 +254,10 @@ static int delay_bio(struct delay_c *dc, struct delay_class *c, struct bio *bio)
delayed->expires = expires = jiffies + msecs_to_jiffies(c->delay);
mutex_lock(&delayed_bios_lock);
+ if (unlikely(!dc->may_delay)) {
+ mutex_unlock(&delayed_bios_lock);
+ return DM_MAPIO_REMAPPED;
+ }
c->ops++;
list_add_tail(&delayed->list, &dc->delayed_bios);
mutex_unlock(&delayed_bios_lock);
@@ -267,7 +271,10 @@ static void delay_presuspend(struct dm_target *ti)
{
struct delay_c *dc = ti->private;
- atomic_set(&dc->may_delay, 0);
+ mutex_lock(&delayed_bios_lock);
+ dc->may_delay = false;
+ mutex_unlock(&delayed_bios_lock);
+
del_timer_sync(&dc->delay_timer);
flush_bios(flush_delayed_bios(dc, 1));
}
@@ -276,7 +283,7 @@ static void delay_resume(struct dm_target *ti)
{
struct delay_c *dc = ti->private;
- atomic_set(&dc->may_delay, 1);
+ dc->may_delay = true;
}
static int delay_map(struct dm_target *ti, struct bio *bio)
diff --git a/drivers/md/dm-era-target.c b/drivers/md/dm-era-target.c
index 8e48920a3ffa..da88237f1fe4 100644
--- a/drivers/md/dm-era-target.c
+++ b/drivers/md/dm-era-target.c
@@ -46,6 +46,7 @@ struct writeset {
static void writeset_free(struct writeset *ws)
{
vfree(ws->bits);
+ ws->bits = NULL;
}
static int setup_on_disk_bitset(struct dm_disk_bitset *info,
@@ -70,8 +71,6 @@ static size_t bitset_size(unsigned nr_bits)
*/
static int writeset_alloc(struct writeset *ws, dm_block_t nr_blocks)
{
- ws->md.nr_bits = nr_blocks;
- ws->md.root = INVALID_WRITESET_ROOT;
ws->bits = vzalloc(bitset_size(nr_blocks));
if (!ws->bits) {
DMERR("%s: couldn't allocate in memory bitset", __func__);
@@ -84,12 +83,14 @@ static int writeset_alloc(struct writeset *ws, dm_block_t nr_blocks)
/*
* Wipes the in-core bitset, and creates a new on disk bitset.
*/
-static int writeset_init(struct dm_disk_bitset *info, struct writeset *ws)
+static int writeset_init(struct dm_disk_bitset *info, struct writeset *ws,
+ dm_block_t nr_blocks)
{
int r;
- memset(ws->bits, 0, bitset_size(ws->md.nr_bits));
+ memset(ws->bits, 0, bitset_size(nr_blocks));
+ ws->md.nr_bits = nr_blocks;
r = setup_on_disk_bitset(info, ws->md.nr_bits, &ws->md.root);
if (r) {
DMERR("%s: setup_on_disk_bitset failed", __func__);
@@ -133,7 +134,7 @@ static int writeset_test_and_set(struct dm_disk_bitset *info,
{
int r;
- if (!test_and_set_bit(block, ws->bits)) {
+ if (!test_bit(block, ws->bits)) {
r = dm_bitset_set_bit(info, ws->md.root, block, &ws->md.root);
if (r) {
/* FIXME: fail mode */
@@ -387,7 +388,7 @@ static void ws_dec(void *context, const void *value)
static int ws_eq(void *context, const void *value1, const void *value2)
{
- return !memcmp(value1, value2, sizeof(struct writeset_metadata));
+ return !memcmp(value1, value2, sizeof(struct writeset_disk));
}
/*----------------------------------------------------------------*/
@@ -563,6 +564,15 @@ static int open_metadata(struct era_metadata *md)
}
disk = dm_block_data(sblock);
+
+ /* Verify the data block size hasn't changed */
+ if (le32_to_cpu(disk->data_block_size) != md->block_size) {
+ DMERR("changing the data block size (from %u to %llu) is not supported",
+ le32_to_cpu(disk->data_block_size), md->block_size);
+ r = -EINVAL;
+ goto bad;
+ }
+
r = dm_tm_open_with_sm(md->bm, SUPERBLOCK_LOCATION,
disk->metadata_space_map_root,
sizeof(disk->metadata_space_map_root),
@@ -574,10 +584,10 @@ static int open_metadata(struct era_metadata *md)
setup_infos(md);
- md->block_size = le32_to_cpu(disk->data_block_size);
md->nr_blocks = le32_to_cpu(disk->nr_blocks);
md->current_era = le32_to_cpu(disk->current_era);
+ ws_unpack(&disk->current_writeset, &md->current_writeset->md);
md->writeset_tree_root = le64_to_cpu(disk->writeset_tree_root);
md->era_array_root = le64_to_cpu(disk->era_array_root);
md->metadata_snap = le64_to_cpu(disk->metadata_snap);
@@ -745,6 +755,12 @@ static int metadata_digest_lookup_writeset(struct era_metadata *md,
ws_unpack(&disk, &d->writeset);
d->value = cpu_to_le32(key);
+ /*
+ * We initialise another bitset info to avoid any caching side effects
+ * with the previous one.
+ */
+ dm_disk_bitset_init(md->tm, &d->info);
+
d->nr_bits = min(d->writeset.nr_bits, md->nr_blocks);
d->current_bit = 0;
d->step = metadata_digest_transcribe_writeset;
@@ -758,12 +774,6 @@ static int metadata_digest_start(struct era_metadata *md, struct digest *d)
return 0;
memset(d, 0, sizeof(*d));
-
- /*
- * We initialise another bitset info to avoid any caching side
- * effects with the previous one.
- */
- dm_disk_bitset_init(md->tm, &d->info);
d->step = metadata_digest_lookup_writeset;
return 0;
@@ -801,6 +811,8 @@ static struct era_metadata *metadata_open(struct block_device *bdev,
static void metadata_close(struct era_metadata *md)
{
+ writeset_free(&md->writesets[0]);
+ writeset_free(&md->writesets[1]);
destroy_persistent_data_objects(md);
kfree(md);
}
@@ -838,6 +850,7 @@ static int metadata_resize(struct era_metadata *md, void *arg)
r = writeset_alloc(&md->writesets[1], *new_size);
if (r) {
DMERR("%s: writeset_alloc failed for writeset 1", __func__);
+ writeset_free(&md->writesets[0]);
return r;
}
@@ -848,6 +861,8 @@ static int metadata_resize(struct era_metadata *md, void *arg)
&value, &md->era_array_root);
if (r) {
DMERR("%s: dm_array_resize failed", __func__);
+ writeset_free(&md->writesets[0]);
+ writeset_free(&md->writesets[1]);
return r;
}
@@ -869,7 +884,6 @@ static int metadata_era_archive(struct era_metadata *md)
}
ws_pack(&md->current_writeset->md, &value);
- md->current_writeset->md.root = INVALID_WRITESET_ROOT;
keys[0] = md->current_era;
__dm_bless_for_disk(&value);
@@ -881,6 +895,7 @@ static int metadata_era_archive(struct era_metadata *md)
return r;
}
+ md->current_writeset->md.root = INVALID_WRITESET_ROOT;
md->archived_writesets = true;
return 0;
@@ -897,7 +912,7 @@ static int metadata_new_era(struct era_metadata *md)
int r;
struct writeset *new_writeset = next_writeset(md);
- r = writeset_init(&md->bitset_info, new_writeset);
+ r = writeset_init(&md->bitset_info, new_writeset, md->nr_blocks);
if (r) {
DMERR("%s: writeset_init failed", __func__);
return r;
@@ -950,7 +965,7 @@ static int metadata_commit(struct era_metadata *md)
int r;
struct dm_block *sblock;
- if (md->current_writeset->md.root != SUPERBLOCK_LOCATION) {
+ if (md->current_writeset->md.root != INVALID_WRITESET_ROOT) {
r = dm_bitset_flush(&md->bitset_info, md->current_writeset->md.root,
&md->current_writeset->md.root);
if (r) {
@@ -1225,8 +1240,10 @@ static void process_deferred_bios(struct era *era)
int r;
struct bio_list deferred_bios, marked_bios;
struct bio *bio;
+ struct blk_plug plug;
bool commit_needed = false;
bool failed = false;
+ struct writeset *ws = era->md->current_writeset;
bio_list_init(&deferred_bios);
bio_list_init(&marked_bios);
@@ -1236,9 +1253,11 @@ static void process_deferred_bios(struct era *era)
bio_list_init(&era->deferred_bios);
spin_unlock(&era->deferred_lock);
+ if (bio_list_empty(&deferred_bios))
+ return;
+
while ((bio = bio_list_pop(&deferred_bios))) {
- r = writeset_test_and_set(&era->md->bitset_info,
- era->md->current_writeset,
+ r = writeset_test_and_set(&era->md->bitset_info, ws,
get_block(era, bio));
if (r < 0) {
/*
@@ -1246,7 +1265,6 @@ static void process_deferred_bios(struct era *era)
* FIXME: finish.
*/
failed = true;
-
} else if (r == 0)
commit_needed = true;
@@ -1262,9 +1280,19 @@ static void process_deferred_bios(struct era *era)
if (failed)
while ((bio = bio_list_pop(&marked_bios)))
bio_io_error(bio);
- else
- while ((bio = bio_list_pop(&marked_bios)))
+ else {
+ blk_start_plug(&plug);
+ while ((bio = bio_list_pop(&marked_bios))) {
+ /*
+ * Only update the in-core writeset if the on-disk one
+ * was updated too.
+ */
+ if (commit_needed)
+ set_bit(get_block(era, bio), ws->bits);
generic_make_request(bio);
+ }
+ blk_finish_plug(&plug);
+ }
}
static void process_rpc_calls(struct era *era)
@@ -1368,7 +1396,7 @@ static void start_worker(struct era *era)
static void stop_worker(struct era *era)
{
atomic_set(&era->suspended, 1);
- flush_workqueue(era->wq);
+ drain_workqueue(era->wq);
}
/*----------------------------------------------------------------
@@ -1485,15 +1513,6 @@ static int era_ctr(struct dm_target *ti, unsigned argc, char **argv)
}
era->md = md;
- era->nr_blocks = calc_nr_blocks(era);
-
- r = metadata_resize(era->md, &era->nr_blocks);
- if (r) {
- ti->error = "couldn't resize metadata";
- era_destroy(era);
- return -ENOMEM;
- }
-
era->wq = alloc_ordered_workqueue("dm-" DM_MSG_PREFIX, WQ_MEM_RECLAIM);
if (!era->wq) {
ti->error = "could not create workqueue for metadata object";
@@ -1561,6 +1580,12 @@ static void era_postsuspend(struct dm_target *ti)
}
stop_worker(era);
+
+ r = metadata_commit(era->md);
+ if (r) {
+ DMERR("%s: metadata_commit failed", __func__);
+ /* FIXME: fail mode */
+ }
}
static int era_preresume(struct dm_target *ti)
@@ -1570,16 +1595,24 @@ static int era_preresume(struct dm_target *ti)
dm_block_t new_size = calc_nr_blocks(era);
if (era->nr_blocks != new_size) {
- r = in_worker1(era, metadata_resize, &new_size);
- if (r)
+ r = metadata_resize(era->md, &new_size);
+ if (r) {
+ DMERR("%s: metadata_resize failed", __func__);
return r;
+ }
+
+ r = metadata_commit(era->md);
+ if (r) {
+ DMERR("%s: metadata_commit failed", __func__);
+ return r;
+ }
era->nr_blocks = new_size;
}
start_worker(era);
- r = in_worker0(era, metadata_new_era);
+ r = in_worker0(era, metadata_era_rollover);
if (r) {
DMERR("%s: metadata_era_rollover failed", __func__);
return r;
diff --git a/drivers/md/dm-flakey.c b/drivers/md/dm-flakey.c
index 2fcf62fb2844..5116856ea81d 100644
--- a/drivers/md/dm-flakey.c
+++ b/drivers/md/dm-flakey.c
@@ -124,9 +124,9 @@ static int parse_features(struct dm_arg_set *as, struct flakey_c *fc,
* Direction r or w?
*/
arg_name = dm_shift_arg(as);
- if (!strcasecmp(arg_name, "w"))
+ if (arg_name && !strcasecmp(arg_name, "w"))
fc->corrupt_bio_rw = WRITE;
- else if (!strcasecmp(arg_name, "r"))
+ else if (arg_name && !strcasecmp(arg_name, "r"))
fc->corrupt_bio_rw = READ;
else {
ti->error = "Invalid corrupt bio direction (r or w)";
@@ -301,8 +301,11 @@ static void corrupt_bio_data(struct bio *bio, struct flakey_c *fc)
*/
bio_for_each_segment(bvec, bio, iter) {
if (bio_iter_len(bio, iter) > corrupt_bio_byte) {
- char *segment = (page_address(bio_iter_page(bio, iter))
- + bio_iter_offset(bio, iter));
+ char *segment;
+ struct page *page = bio_iter_page(bio, iter);
+ if (unlikely(page == ZERO_PAGE(0)))
+ break;
+ segment = (page_address(page) + bio_iter_offset(bio, iter));
segment[corrupt_bio_byte] = fc->corrupt_bio_value;
DMDEBUG("Corrupting data bio=%p by writing %u to byte %u "
"(rw=%c bi_opf=%u bi_sector=%llu size=%u)\n",
@@ -364,9 +367,11 @@ static int flakey_map(struct dm_target *ti, struct bio *bio)
/*
* Corrupt matching writes.
*/
- if (fc->corrupt_bio_byte && (fc->corrupt_bio_rw == WRITE)) {
- if (all_corrupt_bio_flags_match(bio, fc))
- corrupt_bio_data(bio, fc);
+ if (fc->corrupt_bio_byte) {
+ if (fc->corrupt_bio_rw == WRITE) {
+ if (all_corrupt_bio_flags_match(bio, fc))
+ corrupt_bio_data(bio, fc);
+ }
goto map_bio;
}
@@ -397,13 +402,14 @@ static int flakey_end_io(struct dm_target *ti, struct bio *bio,
}
if (!*error && pb->bio_submitted && (bio_data_dir(bio) == READ)) {
- if (fc->corrupt_bio_byte && (fc->corrupt_bio_rw == READ) &&
- all_corrupt_bio_flags_match(bio, fc)) {
- /*
- * Corrupt successful matching READs while in down state.
- */
- corrupt_bio_data(bio, fc);
-
+ if (fc->corrupt_bio_byte) {
+ if ((fc->corrupt_bio_rw == READ) &&
+ all_corrupt_bio_flags_match(bio, fc)) {
+ /*
+ * Corrupt successful matching READs while in down state.
+ */
+ corrupt_bio_data(bio, fc);
+ }
} else if (!test_bit(DROP_WRITES, &fc->flags) &&
!test_bit(ERROR_WRITES, &fc->flags)) {
/*
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index e8eeee680750..a884fcf65063 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -29,11 +29,11 @@
#define DEFAULT_BUFFER_SECTORS 128
#define DEFAULT_JOURNAL_WATERMARK 50
#define DEFAULT_SYNC_MSEC 10000
-#define DEFAULT_MAX_JOURNAL_SECTORS 131072
+#define DEFAULT_MAX_JOURNAL_SECTORS (IS_ENABLED(CONFIG_64BIT) ? 131072 : 8192)
#define MIN_LOG2_INTERLEAVE_SECTORS 3
#define MAX_LOG2_INTERLEAVE_SECTORS 31
#define METADATA_WORKQUEUE_MAX_ACTIVE 16
-#define RECALC_SECTORS 8192
+#define RECALC_SECTORS (IS_ENABLED(CONFIG_64BIT) ? 32768 : 2048)
#define RECALC_WRITE_SUPER 16
/*
@@ -240,6 +240,7 @@ struct dm_integrity_c {
bool journal_uptodate;
bool just_formatted;
+ bool legacy_recalculate;
struct alg_spec internal_hash_alg;
struct alg_spec journal_crypt_alg;
@@ -345,6 +346,14 @@ static int dm_integrity_failed(struct dm_integrity_c *ic)
return READ_ONCE(ic->failed);
}
+static bool dm_integrity_disable_recalculate(struct dm_integrity_c *ic)
+{
+ if ((ic->internal_hash_alg.key || ic->journal_mac_alg.key) &&
+ !ic->legacy_recalculate)
+ return true;
+ return false;
+}
+
static commit_id_t dm_integrity_commit_id(struct dm_integrity_c *ic, unsigned i,
unsigned j, unsigned char seq)
{
@@ -1153,12 +1162,52 @@ static int dm_integrity_rw_tag(struct dm_integrity_c *ic, unsigned char *tag, se
return 0;
}
-static void dm_integrity_flush_buffers(struct dm_integrity_c *ic)
+struct flush_request {
+ struct dm_io_request io_req;
+ struct dm_io_region io_reg;
+ struct dm_integrity_c *ic;
+ struct completion comp;
+};
+
+static void flush_notify(unsigned long error, void *fr_)
+{
+ struct flush_request *fr = fr_;
+ if (unlikely(error != 0))
+ dm_integrity_io_error(fr->ic, "flusing disk cache", -EIO);
+ complete(&fr->comp);
+}
+
+static void dm_integrity_flush_buffers(struct dm_integrity_c *ic, bool flush_data)
{
int r;
+
+ struct flush_request fr;
+
+ if (!ic->meta_dev)
+ flush_data = false;
+ if (flush_data) {
+ fr.io_req.bi_op = REQ_OP_WRITE,
+ fr.io_req.bi_op_flags = REQ_PREFLUSH | REQ_SYNC,
+ fr.io_req.mem.type = DM_IO_KMEM,
+ fr.io_req.mem.ptr.addr = NULL,
+ fr.io_req.notify.fn = flush_notify,
+ fr.io_req.notify.context = &fr;
+ fr.io_req.client = dm_bufio_get_dm_io_client(ic->bufio),
+ fr.io_reg.bdev = ic->dev->bdev,
+ fr.io_reg.sector = 0,
+ fr.io_reg.count = 0,
+ fr.ic = ic;
+ init_completion(&fr.comp);
+ r = dm_io(&fr.io_req, 1, &fr.io_reg, NULL);
+ BUG_ON(r);
+ }
+
r = dm_bufio_write_dirty_buffers(ic->bufio);
if (unlikely(r))
dm_integrity_io_error(ic, "writing tags", r);
+
+ if (flush_data)
+ wait_for_completion(&fr.comp);
}
static void sleep_on_endio_wait(struct dm_integrity_c *ic)
@@ -1330,11 +1379,12 @@ static void integrity_metadata(struct work_struct *w)
checksums = checksums_onstack;
__bio_for_each_segment(bv, bio, iter, dio->bio_details.bi_iter) {
+ struct bio_vec bv_copy = bv;
unsigned pos;
char *mem, *checksums_ptr;
again:
- mem = (char *)kmap_atomic(bv.bv_page) + bv.bv_offset;
+ mem = (char *)kmap_atomic(bv_copy.bv_page) + bv_copy.bv_offset;
pos = 0;
checksums_ptr = checksums;
do {
@@ -1343,7 +1393,7 @@ again:
sectors_to_process -= ic->sectors_per_block;
pos += ic->sectors_per_block << SECTOR_SHIFT;
sector += ic->sectors_per_block;
- } while (pos < bv.bv_len && sectors_to_process && checksums != checksums_onstack);
+ } while (pos < bv_copy.bv_len && sectors_to_process && checksums != checksums_onstack);
kunmap_atomic(mem);
r = dm_integrity_rw_tag(ic, checksums, &dio->metadata_block, &dio->metadata_offset,
@@ -1363,9 +1413,9 @@ again:
if (!sectors_to_process)
break;
- if (unlikely(pos < bv.bv_len)) {
- bv.bv_offset += pos;
- bv.bv_len -= pos;
+ if (unlikely(pos < bv_copy.bv_len)) {
+ bv_copy.bv_offset += pos;
+ bv_copy.bv_len -= pos;
goto again;
}
}
@@ -1846,7 +1896,7 @@ static void integrity_commit(struct work_struct *w)
flushes = bio_list_get(&ic->flush_bio_list);
if (unlikely(ic->mode != 'J')) {
spin_unlock_irq(&ic->endio_wait.lock);
- dm_integrity_flush_buffers(ic);
+ dm_integrity_flush_buffers(ic, true);
goto release_flush_bios;
}
@@ -2057,7 +2107,7 @@ skip_io:
complete_journal_op(&comp);
wait_for_completion_io(&comp.comp);
- dm_integrity_flush_buffers(ic);
+ dm_integrity_flush_buffers(ic, true);
}
static void integrity_writer(struct work_struct *w)
@@ -2067,10 +2117,6 @@ static void integrity_writer(struct work_struct *w)
unsigned prev_free_sectors;
- /* the following test is not needed, but it tests the replay code */
- if (unlikely(dm_post_suspending(ic->ti)) && !ic->meta_dev)
- return;
-
spin_lock_irq(&ic->endio_wait.lock);
write_start = ic->committed_section;
write_sections = ic->n_committed_sections;
@@ -2099,7 +2145,7 @@ static void recalc_write_super(struct dm_integrity_c *ic)
{
int r;
- dm_integrity_flush_buffers(ic);
+ dm_integrity_flush_buffers(ic, false);
if (dm_integrity_failed(ic))
return;
@@ -2406,10 +2452,9 @@ static void dm_integrity_postsuspend(struct dm_target *ti)
drain_workqueue(ic->commit_wq);
if (ic->mode == 'J') {
- if (ic->meta_dev)
- queue_work(ic->writer_wq, &ic->writer_work);
+ queue_work(ic->writer_wq, &ic->writer_work);
drain_workqueue(ic->writer_wq);
- dm_integrity_flush_buffers(ic);
+ dm_integrity_flush_buffers(ic, true);
}
BUG_ON(!RB_EMPTY_ROOT(&ic->in_progress));
@@ -2463,6 +2508,7 @@ static void dm_integrity_status(struct dm_target *ti, status_type_t type,
arg_count += !!ic->internal_hash_alg.alg_string;
arg_count += !!ic->journal_crypt_alg.alg_string;
arg_count += !!ic->journal_mac_alg.alg_string;
+ arg_count += ic->legacy_recalculate;
DMEMIT("%s %llu %u %c %u", ic->dev->name, (unsigned long long)ic->start,
ic->tag_size, ic->mode, arg_count);
if (ic->meta_dev)
@@ -2476,6 +2522,8 @@ static void dm_integrity_status(struct dm_target *ti, status_type_t type,
DMEMIT(" buffer_sectors:%u", 1U << ic->log2_buffer_sectors);
DMEMIT(" journal_watermark:%u", (unsigned)watermark_percentage);
DMEMIT(" commit_time:%u", ic->autocommit_msec);
+ if (ic->legacy_recalculate)
+ DMEMIT(" legacy_recalculate");
#define EMIT_ALG(a, n) \
do { \
@@ -3078,7 +3126,7 @@ static int dm_integrity_ctr(struct dm_target *ti, unsigned argc, char **argv)
unsigned extra_args;
struct dm_arg_set as;
static const struct dm_arg _args[] = {
- {0, 9, "Invalid number of feature args"},
+ {0, 12, "Invalid number of feature args"},
};
unsigned journal_sectors, interleave_sectors, buffer_sectors, journal_watermark, sync_msec;
bool recalculate;
@@ -3208,6 +3256,8 @@ static int dm_integrity_ctr(struct dm_target *ti, unsigned argc, char **argv)
goto bad;
} else if (!strcmp(opt_string, "recalculate")) {
recalculate = true;
+ } else if (!strcmp(opt_string, "legacy_recalculate")) {
+ ic->legacy_recalculate = true;
} else {
r = -EINVAL;
ti->error = "Invalid argument";
@@ -3450,6 +3500,7 @@ try_smaller_buffer:
}
if (ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING)) {
+ size_t recalc_tags_size;
if (!ic->internal_hash) {
r = -EINVAL;
ti->error = "Recalculate is only valid with internal hash";
@@ -3468,13 +3519,29 @@ try_smaller_buffer:
r = -ENOMEM;
goto bad;
}
- ic->recalc_tags = kvmalloc_array(RECALC_SECTORS >> ic->sb->log2_sectors_per_block,
- ic->tag_size, GFP_KERNEL);
+ recalc_tags_size = (RECALC_SECTORS >> ic->sb->log2_sectors_per_block) * ic->tag_size;
+ if (crypto_shash_digestsize(ic->internal_hash) > ic->tag_size)
+ recalc_tags_size += crypto_shash_digestsize(ic->internal_hash) - ic->tag_size;
+ ic->recalc_tags = kvmalloc(recalc_tags_size, GFP_KERNEL);
if (!ic->recalc_tags) {
ti->error = "Cannot allocate tags for recalculating";
r = -ENOMEM;
goto bad;
}
+ } else {
+ if (ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING)) {
+ ti->error = "Recalculate can only be specified with internal_hash";
+ r = -EINVAL;
+ goto bad;
+ }
+ }
+
+ if (ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING) &&
+ le64_to_cpu(ic->sb->recalc_sector) < ic->provided_data_sectors &&
+ dm_integrity_disable_recalculate(ic)) {
+ ti->error = "Recalculating with HMAC is disabled for security reasons - if you really need it, use the argument \"legacy_recalculate\"";
+ r = -EOPNOTSUPP;
+ goto bad;
}
ic->bufio = dm_bufio_client_create(ic->meta_dev ? ic->meta_dev->bdev : ic->dev->bdev,
@@ -3494,8 +3561,6 @@ try_smaller_buffer:
}
if (should_write_sb) {
- int r;
-
init_journal(ic, 0, ic->journal_sections, 0);
r = dm_integrity_failed(ic);
if (unlikely(r)) {
@@ -3625,11 +3690,13 @@ int __init dm_integrity_init(void)
}
r = dm_register_target(&integrity_target);
-
- if (r < 0)
+ if (r < 0) {
DMERR("register failed %d", r);
+ kmem_cache_destroy(journal_io_cache);
+ return r;
+ }
- return r;
+ return 0;
}
void dm_integrity_exit(void)
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index 81ffc59d05c9..4312007d2d34 100644
--- a/drivers/md/dm-io.c
+++ b/drivers/md/dm-io.c
@@ -306,7 +306,7 @@ static void do_region(int op, int op_flags, unsigned region,
struct request_queue *q = bdev_get_queue(where->bdev);
unsigned short logical_block_size = queue_logical_block_size(q);
sector_t num_sectors;
- unsigned int uninitialized_var(special_cmd_max_sectors);
+ unsigned int special_cmd_max_sectors;
/*
* Reject unsupported discard and write same requests.
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index f666778ad237..88e89796ccbf 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -17,6 +17,7 @@
#include <linux/dm-ioctl.h>
#include <linux/hdreg.h>
#include <linux/compat.h>
+#include <linux/nospec.h>
#include <linux/uaccess.h>
@@ -529,7 +530,7 @@ static int list_devices(struct file *filp, struct dm_ioctl *param, size_t param_
* Grab our output buffer.
*/
nl = orig_nl = get_result_buffer(param, param_size, &len);
- if (len < needed) {
+ if (len < needed || len < sizeof(nl->dev)) {
param->flags |= DM_BUFFER_FULL_FLAG;
goto out;
}
@@ -572,7 +573,7 @@ static void list_version_get_needed(struct target_type *tt, void *needed_param)
size_t *needed = needed_param;
*needed += sizeof(struct dm_target_versions);
- *needed += strlen(tt->name);
+ *needed += strlen(tt->name) + 1;
*needed += ALIGN_MASK;
}
@@ -627,7 +628,7 @@ static int list_versions(struct file *filp, struct dm_ioctl *param, size_t param
iter_info.old_vers = NULL;
iter_info.vers = vers;
iter_info.flags = 0;
- iter_info.end = (char *)vers+len;
+ iter_info.end = (char *)vers + needed;
/*
* Now loop through filling out the names & versions.
@@ -1409,11 +1410,12 @@ static int table_clear(struct file *filp, struct dm_ioctl *param, size_t param_s
hc->new_map = NULL;
}
- param->flags &= ~DM_INACTIVE_PRESENT_FLAG;
-
- __dev_status(hc->md, param);
md = hc->md;
up_write(&_hash_lock);
+
+ param->flags &= ~DM_INACTIVE_PRESENT_FLAG;
+ __dev_status(md, param);
+
if (old_map) {
dm_sync_table(md);
dm_table_destroy(old_map);
@@ -1575,6 +1577,7 @@ static int target_message(struct file *filp, struct dm_ioctl *param, size_t para
if (!argc) {
DMWARN("Empty message received.");
+ r = -EINVAL;
goto out_argv;
}
@@ -1669,6 +1672,7 @@ static ioctl_fn lookup_ioctl(unsigned int cmd, int *ioctl_flags)
if (unlikely(cmd >= ARRAY_SIZE(_ioctls)))
return NULL;
+ cmd = array_index_nospec(cmd, ARRAY_SIZE(_ioctls));
*ioctl_flags = _ioctls[cmd].flags;
return _ioctls[cmd].fn;
}
@@ -1818,7 +1822,7 @@ static int ctl_ioctl(struct file *file, uint command, struct dm_ioctl __user *us
int ioctl_flags;
int param_flags;
unsigned int cmd;
- struct dm_ioctl *uninitialized_var(param);
+ struct dm_ioctl *param;
ioctl_fn fn = NULL;
size_t input_param_size;
struct dm_ioctl param_kernel;
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 23de59a692c5..72aa5097b68f 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -998,12 +998,13 @@ static int validate_region_size(struct raid_set *rs, unsigned long region_size)
static int validate_raid_redundancy(struct raid_set *rs)
{
unsigned int i, rebuild_cnt = 0;
- unsigned int rebuilds_per_group = 0, copies;
+ unsigned int rebuilds_per_group = 0, copies, raid_disks;
unsigned int group_size, last_group_start;
- for (i = 0; i < rs->md.raid_disks; i++)
- if (!test_bit(In_sync, &rs->dev[i].rdev.flags) ||
- !rs->dev[i].rdev.sb_page)
+ for (i = 0; i < rs->raid_disks; i++)
+ if (!test_bit(FirstUse, &rs->dev[i].rdev.flags) &&
+ ((!test_bit(In_sync, &rs->dev[i].rdev.flags) ||
+ !rs->dev[i].rdev.sb_page)))
rebuild_cnt++;
switch (rs->md.level) {
@@ -1043,8 +1044,9 @@ static int validate_raid_redundancy(struct raid_set *rs)
* A A B B C
* C D D E E
*/
+ raid_disks = min(rs->raid_disks, rs->md.raid_disks);
if (__is_raid10_near(rs->md.new_layout)) {
- for (i = 0; i < rs->md.raid_disks; i++) {
+ for (i = 0; i < raid_disks; i++) {
if (!(i % copies))
rebuilds_per_group = 0;
if ((!rs->dev[i].rdev.sb_page ||
@@ -1067,10 +1069,10 @@ static int validate_raid_redundancy(struct raid_set *rs)
* results in the need to treat the last (potentially larger)
* set differently.
*/
- group_size = (rs->md.raid_disks / copies);
- last_group_start = (rs->md.raid_disks / group_size) - 1;
+ group_size = (raid_disks / copies);
+ last_group_start = (raid_disks / group_size) - 1;
last_group_start *= group_size;
- for (i = 0; i < rs->md.raid_disks; i++) {
+ for (i = 0; i < raid_disks; i++) {
if (!(i % copies) && !(i > last_group_start))
rebuilds_per_group = 0;
if ((!rs->dev[i].rdev.sb_page ||
@@ -1585,7 +1587,7 @@ static sector_t __rdev_sectors(struct raid_set *rs)
{
int i;
- for (i = 0; i < rs->md.raid_disks; i++) {
+ for (i = 0; i < rs->raid_disks; i++) {
struct md_rdev *rdev = &rs->dev[i].rdev;
if (!test_bit(Journal, &rdev->flags) &&
@@ -1892,6 +1894,14 @@ static bool rs_takeover_requested(struct raid_set *rs)
return rs->md.new_level != rs->md.level;
}
+/* True if layout is set to reshape. */
+static bool rs_is_layout_change(struct raid_set *rs, bool use_mddev)
+{
+ return (use_mddev ? rs->md.delta_disks : rs->delta_disks) ||
+ rs->md.new_layout != rs->md.layout ||
+ rs->md.new_chunk_sectors != rs->md.chunk_sectors;
+}
+
/* True if @rs is requested to reshape by ctr */
static bool rs_reshape_requested(struct raid_set *rs)
{
@@ -1904,9 +1914,7 @@ static bool rs_reshape_requested(struct raid_set *rs)
if (rs_is_raid0(rs))
return false;
- change = mddev->new_layout != mddev->layout ||
- mddev->new_chunk_sectors != mddev->chunk_sectors ||
- rs->delta_disks;
+ change = rs_is_layout_change(rs, false);
/* Historical case to support raid1 reshape without delta disks */
if (rs_is_raid1(rs)) {
@@ -2843,7 +2851,7 @@ static sector_t _get_reshape_sectors(struct raid_set *rs)
}
/*
- *
+ * Reshape:
* - change raid layout
* - change chunk size
* - add disks
@@ -2953,6 +2961,20 @@ static int rs_setup_reshape(struct raid_set *rs)
}
/*
+ * If the md resync thread has updated superblock with max reshape position
+ * at the end of a reshape but not (yet) reset the layout configuration
+ * changes -> reset the latter.
+ */
+static void rs_reset_inconclusive_reshape(struct raid_set *rs)
+{
+ if (!rs_is_reshaping(rs) && rs_is_layout_change(rs, true)) {
+ rs_set_cur(rs);
+ rs->md.delta_disks = 0;
+ rs->md.reshape_backwards = 0;
+ }
+}
+
+/*
* Enable/disable discard support on RAID set depending on
* RAID level and discard properties of underlying RAID members.
*/
@@ -3221,11 +3243,14 @@ static int raid_ctr(struct dm_target *ti, unsigned int argc, char **argv)
if (r)
goto bad;
+ /* Catch any inconclusive reshape superblock content. */
+ rs_reset_inconclusive_reshape(rs);
+
/* Start raid set read-only and assumed clean to change in raid_resume() */
rs->md.ro = 1;
rs->md.in_sync = 1;
- /* Keep array frozen */
+ /* Keep array frozen until resume. */
set_bit(MD_RECOVERY_FROZEN, &rs->md.recovery);
/* Has to be held on running the array */
@@ -3239,7 +3264,6 @@ static int raid_ctr(struct dm_target *ti, unsigned int argc, char **argv)
}
r = md_start(&rs->md);
-
if (r) {
ti->error = "Failed to start raid array";
mddev_unlock(&rs->md);
@@ -3265,15 +3289,19 @@ static int raid_ctr(struct dm_target *ti, unsigned int argc, char **argv)
/* Try to adjust the raid4/5/6 stripe cache size to the stripe size */
if (rs_is_raid456(rs)) {
r = rs_set_raid456_stripe_cache(rs);
- if (r)
+ if (r) {
+ mddev_unlock(&rs->md);
goto bad_stripe_cache;
+ }
}
/* Now do an early reshape check */
if (test_bit(RT_FLAG_RESHAPE_RS, &rs->runtime_flags)) {
r = rs_check_reshape(rs);
- if (r)
+ if (r) {
+ mddev_unlock(&rs->md);
goto bad_check_reshape;
+ }
/* Restore new, ctr requested layout to perform check */
rs_config_restore(rs, &rs_layout);
@@ -3282,6 +3310,7 @@ static int raid_ctr(struct dm_target *ti, unsigned int argc, char **argv)
r = rs->md.pers->check_reshape(&rs->md);
if (r) {
ti->error = "Reshape check failed";
+ mddev_unlock(&rs->md);
goto bad_check_reshape;
}
}
@@ -3509,7 +3538,7 @@ static void raid_status(struct dm_target *ti, status_type_t type,
{
struct raid_set *rs = ti->private;
struct mddev *mddev = &rs->md;
- struct r5conf *conf = mddev->private;
+ struct r5conf *conf = rs_is_raid456(rs) ? mddev->private : NULL;
int i, max_nr_stripes = conf ? conf->max_nr_stripes : 0;
unsigned long recovery;
unsigned int raid_param_cnt = 1; /* at least 1 for chunksize */
@@ -3729,13 +3758,13 @@ static int raid_iterate_devices(struct dm_target *ti,
unsigned int i;
int r = 0;
- for (i = 0; !r && i < rs->md.raid_disks; i++)
- if (rs->dev[i].data_dev)
- r = fn(ti,
- rs->dev[i].data_dev,
- 0, /* No offset on data devs */
- rs->md.dev_sectors,
- data);
+ for (i = 0; !r && i < rs->raid_disks; i++) {
+ if (rs->dev[i].data_dev) {
+ r = fn(ti, rs->dev[i].data_dev,
+ 0, /* No offset on data devs */
+ rs->md.dev_sectors, data);
+ }
+ }
return r;
}
@@ -3780,7 +3809,7 @@ static void attempt_restore_of_faulty_devices(struct raid_set *rs)
memset(cleared_failed_devices, 0, sizeof(cleared_failed_devices));
- for (i = 0; i < mddev->raid_disks; i++) {
+ for (i = 0; i < rs->raid_disks; i++) {
r = &rs->dev[i].rdev;
/* HM FIXME: enhance journal device recovery processing */
if (test_bit(Journal, &r->flags))
diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c
index 9fde174ce396..2957a3763f01 100644
--- a/drivers/md/dm-rq.c
+++ b/drivers/md/dm-rq.c
@@ -831,6 +831,7 @@ out_tag_set:
blk_mq_free_tag_set(md->tag_set);
out_kfree_tag_set:
kfree(md->tag_set);
+ md->tag_set = NULL;
return err;
}
@@ -840,6 +841,7 @@ void dm_mq_cleanup_mapped_device(struct mapped_device *md)
if (md->tag_set) {
blk_mq_free_tag_set(md->tag_set);
kfree(md->tag_set);
+ md->tag_set = NULL;
}
}
diff --git a/drivers/md/dm-snap-persistent.c b/drivers/md/dm-snap-persistent.c
index 963d3774c93e..247089c2be25 100644
--- a/drivers/md/dm-snap-persistent.c
+++ b/drivers/md/dm-snap-persistent.c
@@ -613,7 +613,7 @@ static int persistent_read_metadata(struct dm_exception_store *store,
chunk_t old, chunk_t new),
void *callback_context)
{
- int r, uninitialized_var(new_snapshot);
+ int r, new_snapshot;
struct pstore *ps = get_info(store);
/*
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index d3f28a9e3fd9..52101e5c7258 100644
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -137,6 +137,11 @@ struct dm_snapshot {
* for them to be committed.
*/
struct bio_list bios_queued_during_merge;
+
+ /*
+ * Flush data after merge.
+ */
+ struct bio flush_bio;
};
/*
@@ -789,7 +794,7 @@ static int dm_add_exception(void *context, chunk_t old, chunk_t new)
static uint32_t __minimum_chunk_size(struct origin *o)
{
struct dm_snapshot *snap;
- unsigned chunk_size = 0;
+ unsigned chunk_size = rounddown_pow_of_two(UINT_MAX);
if (o)
list_for_each_entry(snap, &o->snapshots, list)
@@ -1061,6 +1066,17 @@ shut:
static void error_bios(struct bio *bio);
+static int flush_data(struct dm_snapshot *s)
+{
+ struct bio *flush_bio = &s->flush_bio;
+
+ bio_reset(flush_bio);
+ bio_set_dev(flush_bio, s->origin->bdev);
+ flush_bio->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH;
+
+ return submit_bio_wait(flush_bio);
+}
+
static void merge_callback(int read_err, unsigned long write_err, void *context)
{
struct dm_snapshot *s = context;
@@ -1074,6 +1090,11 @@ static void merge_callback(int read_err, unsigned long write_err, void *context)
goto shut;
}
+ if (flush_data(s) < 0) {
+ DMERR("Flush after merge failed: shutting down merge");
+ goto shut;
+ }
+
if (s->store->type->commit_merge(s->store,
s->num_merging_chunks) < 0) {
DMERR("Write error in exception store: shutting down merge");
@@ -1198,6 +1219,7 @@ static int snapshot_ctr(struct dm_target *ti, unsigned int argc, char **argv)
s->first_merging_chunk = 0;
s->num_merging_chunks = 0;
bio_list_init(&s->bios_queued_during_merge);
+ bio_init(&s->flush_bio, NULL, 0);
/* Allocate hash table for COW data */
if (init_hash_tables(s)) {
@@ -1264,6 +1286,7 @@ static int snapshot_ctr(struct dm_target *ti, unsigned int argc, char **argv)
if (!s->store->chunk_size) {
ti->error = "Chunk size not set";
+ r = -EINVAL;
goto bad_read_metadata;
}
@@ -1391,6 +1414,8 @@ static void snapshot_dtr(struct dm_target *ti)
mutex_destroy(&s->lock);
+ bio_uninit(&s->flush_bio);
+
dm_put_device(ti, s->cow);
dm_put_device(ti, s->origin);
diff --git a/drivers/md/dm-stats.c b/drivers/md/dm-stats.c
index 21de30b4e2a1..0eb48e739f7e 100644
--- a/drivers/md/dm-stats.c
+++ b/drivers/md/dm-stats.c
@@ -188,7 +188,7 @@ static int dm_stat_in_flight(struct dm_stat_shared *shared)
atomic_read(&shared->in_flight[WRITE]);
}
-void dm_stats_init(struct dm_stats *stats)
+int dm_stats_init(struct dm_stats *stats)
{
int cpu;
struct dm_stats_last_position *last;
@@ -196,11 +196,16 @@ void dm_stats_init(struct dm_stats *stats)
mutex_init(&stats->mutex);
INIT_LIST_HEAD(&stats->list);
stats->last = alloc_percpu(struct dm_stats_last_position);
+ if (!stats->last)
+ return -ENOMEM;
+
for_each_possible_cpu(cpu) {
last = per_cpu_ptr(stats->last, cpu);
last->last_sector = (sector_t)ULLONG_MAX;
last->last_rw = UINT_MAX;
}
+
+ return 0;
}
void dm_stats_cleanup(struct dm_stats *stats)
@@ -224,6 +229,7 @@ void dm_stats_cleanup(struct dm_stats *stats)
atomic_read(&shared->in_flight[READ]),
atomic_read(&shared->in_flight[WRITE]));
}
+ cond_resched();
}
dm_stat_free(&s->rcu_head);
}
@@ -313,6 +319,7 @@ static int dm_stats_create(struct dm_stats *stats, sector_t start, sector_t end,
for (ni = 0; ni < n_entries; ni++) {
atomic_set(&s->stat_shared[ni].in_flight[READ], 0);
atomic_set(&s->stat_shared[ni].in_flight[WRITE], 0);
+ cond_resched();
}
if (s->n_histogram_entries) {
@@ -325,6 +332,7 @@ static int dm_stats_create(struct dm_stats *stats, sector_t start, sector_t end,
for (ni = 0; ni < n_entries; ni++) {
s->stat_shared[ni].tmp.histogram = hi;
hi += s->n_histogram_entries + 1;
+ cond_resched();
}
}
@@ -345,6 +353,7 @@ static int dm_stats_create(struct dm_stats *stats, sector_t start, sector_t end,
for (ni = 0; ni < n_entries; ni++) {
p[ni].histogram = hi;
hi += s->n_histogram_entries + 1;
+ cond_resched();
}
}
}
@@ -474,6 +483,7 @@ static int dm_stats_list(struct dm_stats *stats, const char *program,
}
DMEMIT("\n");
}
+ cond_resched();
}
mutex_unlock(&stats->mutex);
@@ -750,6 +760,7 @@ static void __dm_stat_clear(struct dm_stat *s, size_t idx_start, size_t idx_end,
local_irq_enable();
}
}
+ cond_resched();
}
}
@@ -865,6 +876,8 @@ static int dm_stats_print(struct dm_stats *stats, int id,
if (unlikely(sz + 1 >= maxlen))
goto buffer_overflow;
+
+ cond_resched();
}
if (clear)
diff --git a/drivers/md/dm-stats.h b/drivers/md/dm-stats.h
index 2ddfae678f32..dcac11fce03b 100644
--- a/drivers/md/dm-stats.h
+++ b/drivers/md/dm-stats.h
@@ -22,7 +22,7 @@ struct dm_stats_aux {
unsigned long long duration_ns;
};
-void dm_stats_init(struct dm_stats *st);
+int dm_stats_init(struct dm_stats *st);
void dm_stats_cleanup(struct dm_stats *st);
struct mapped_device;
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 36275c59e4e7..3faaf21be5b6 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -431,14 +431,23 @@ int dm_get_device(struct dm_target *ti, const char *path, fmode_t mode,
{
int r;
dev_t dev;
+ unsigned int major, minor;
+ char dummy;
struct dm_dev_internal *dd;
struct dm_table *t = ti->table;
BUG_ON(!t);
- dev = dm_get_dev_t(path);
- if (!dev)
- return -ENODEV;
+ if (sscanf(path, "%u:%u%c", &major, &minor, &dummy) == 2) {
+ /* Extract the major/minor numbers */
+ dev = MKDEV(major, minor);
+ if (MAJOR(dev) != major || MINOR(dev) != minor)
+ return -EOVERFLOW;
+ } else {
+ dev = dm_get_dev_t(path);
+ if (!dev)
+ return -ENODEV;
+ }
dd = find_device(&t->devices, dev);
if (!dd) {
@@ -662,7 +671,7 @@ static int validate_hardware_logical_block_alignment(struct dm_table *table,
*/
unsigned short remaining = 0;
- struct dm_target *uninitialized_var(ti);
+ struct dm_target *ti;
struct queue_limits ti_limits;
unsigned i;
@@ -882,10 +891,10 @@ void dm_table_set_type(struct dm_table *t, enum dm_queue_mode type)
}
EXPORT_SYMBOL_GPL(dm_table_set_type);
-static int device_supports_dax(struct dm_target *ti, struct dm_dev *dev,
+static int device_not_dax_capable(struct dm_target *ti, struct dm_dev *dev,
sector_t start, sector_t len, void *data)
{
- return bdev_dax_supported(dev->bdev, PAGE_SIZE);
+ return !bdev_dax_supported(dev->bdev, PAGE_SIZE);
}
static bool dm_table_supports_dax(struct dm_table *t)
@@ -901,7 +910,7 @@ static bool dm_table_supports_dax(struct dm_table *t)
return false;
if (!ti->type->iterate_devices ||
- !ti->type->iterate_devices(ti, device_supports_dax, NULL))
+ ti->type->iterate_devices(ti, device_not_dax_capable, NULL))
return false;
}
@@ -1336,12 +1345,6 @@ void dm_table_event_callback(struct dm_table *t,
void dm_table_event(struct dm_table *t)
{
- /*
- * You can no longer call dm_table_event() from interrupt
- * context, use a bottom half instead.
- */
- BUG_ON(in_interrupt());
-
mutex_lock(&_event_lock);
if (t->event_fn)
t->event_fn(t->event_context);
@@ -1389,6 +1392,46 @@ struct dm_target *dm_table_find_target(struct dm_table *t, sector_t sector)
return &t->targets[(KEYS_PER_NODE * n) + k];
}
+/*
+ * type->iterate_devices() should be called when the sanity check needs to
+ * iterate and check all underlying data devices. iterate_devices() will
+ * iterate all underlying data devices until it encounters a non-zero return
+ * code, returned by whether the input iterate_devices_callout_fn, or
+ * iterate_devices() itself internally.
+ *
+ * For some target type (e.g. dm-stripe), one call of iterate_devices() may
+ * iterate multiple underlying devices internally, in which case a non-zero
+ * return code returned by iterate_devices_callout_fn will stop the iteration
+ * in advance.
+ *
+ * Cases requiring _any_ underlying device supporting some kind of attribute,
+ * should use the iteration structure like dm_table_any_dev_attr(), or call
+ * it directly. @func should handle semantics of positive examples, e.g.
+ * capable of something.
+ *
+ * Cases requiring _all_ underlying devices supporting some kind of attribute,
+ * should use the iteration structure like dm_table_supports_nowait() or
+ * dm_table_supports_discards(). Or introduce dm_table_all_devs_attr() that
+ * uses an @anti_func that handle semantics of counter examples, e.g. not
+ * capable of something. So: return !dm_table_any_dev_attr(t, anti_func, data);
+ */
+static bool dm_table_any_dev_attr(struct dm_table *t,
+ iterate_devices_callout_fn func, void *data)
+{
+ struct dm_target *ti;
+ unsigned int i;
+
+ for (i = 0; i < dm_table_get_num_targets(t); i++) {
+ ti = dm_table_get_target(t, i);
+
+ if (ti->type->iterate_devices &&
+ ti->type->iterate_devices(ti, func, data))
+ return true;
+ }
+
+ return false;
+}
+
static int count_device(struct dm_target *ti, struct dm_dev *dev,
sector_t start, sector_t len, void *data)
{
@@ -1425,13 +1468,13 @@ bool dm_table_has_no_data_devices(struct dm_table *table)
return true;
}
-static int device_is_zoned_model(struct dm_target *ti, struct dm_dev *dev,
- sector_t start, sector_t len, void *data)
+static int device_not_zoned_model(struct dm_target *ti, struct dm_dev *dev,
+ sector_t start, sector_t len, void *data)
{
struct request_queue *q = bdev_get_queue(dev->bdev);
enum blk_zoned_model *zoned_model = data;
- return q && blk_queue_zoned_model(q) == *zoned_model;
+ return !q || blk_queue_zoned_model(q) != *zoned_model;
}
static bool dm_table_supports_zoned_model(struct dm_table *t,
@@ -1448,37 +1491,20 @@ static bool dm_table_supports_zoned_model(struct dm_table *t,
return false;
if (!ti->type->iterate_devices ||
- !ti->type->iterate_devices(ti, device_is_zoned_model, &zoned_model))
+ ti->type->iterate_devices(ti, device_not_zoned_model, &zoned_model))
return false;
}
return true;
}
-static int device_matches_zone_sectors(struct dm_target *ti, struct dm_dev *dev,
- sector_t start, sector_t len, void *data)
+static int device_not_matches_zone_sectors(struct dm_target *ti, struct dm_dev *dev,
+ sector_t start, sector_t len, void *data)
{
struct request_queue *q = bdev_get_queue(dev->bdev);
unsigned int *zone_sectors = data;
- return q && blk_queue_zone_sectors(q) == *zone_sectors;
-}
-
-static bool dm_table_matches_zone_sectors(struct dm_table *t,
- unsigned int zone_sectors)
-{
- struct dm_target *ti;
- unsigned i;
-
- for (i = 0; i < dm_table_get_num_targets(t); i++) {
- ti = dm_table_get_target(t, i);
-
- if (!ti->type->iterate_devices ||
- !ti->type->iterate_devices(ti, device_matches_zone_sectors, &zone_sectors))
- return false;
- }
-
- return true;
+ return !q || blk_queue_zone_sectors(q) != *zone_sectors;
}
static int validate_hardware_zoned_model(struct dm_table *table,
@@ -1498,7 +1524,7 @@ static int validate_hardware_zoned_model(struct dm_table *table,
if (!zone_sectors || !is_power_of_2(zone_sectors))
return -EINVAL;
- if (!dm_table_matches_zone_sectors(table, zone_sectors)) {
+ if (dm_table_any_dev_attr(table, device_not_matches_zone_sectors, &zone_sectors)) {
DMERR("%s: zone sectors is not consistent across all devices",
dm_device_name(table->md));
return -EINVAL;
@@ -1688,29 +1714,12 @@ static int device_dax_write_cache_enabled(struct dm_target *ti,
return false;
}
-static int dm_table_supports_dax_write_cache(struct dm_table *t)
-{
- struct dm_target *ti;
- unsigned i;
-
- for (i = 0; i < dm_table_get_num_targets(t); i++) {
- ti = dm_table_get_target(t, i);
-
- if (ti->type->iterate_devices &&
- ti->type->iterate_devices(ti,
- device_dax_write_cache_enabled, NULL))
- return true;
- }
-
- return false;
-}
-
-static int device_is_nonrot(struct dm_target *ti, struct dm_dev *dev,
- sector_t start, sector_t len, void *data)
+static int device_is_rotational(struct dm_target *ti, struct dm_dev *dev,
+ sector_t start, sector_t len, void *data)
{
struct request_queue *q = bdev_get_queue(dev->bdev);
- return q && blk_queue_nonrot(q);
+ return q && !blk_queue_nonrot(q);
}
static int device_is_not_random(struct dm_target *ti, struct dm_dev *dev,
@@ -1721,43 +1730,26 @@ static int device_is_not_random(struct dm_target *ti, struct dm_dev *dev,
return q && !blk_queue_add_random(q);
}
-static int queue_supports_sg_merge(struct dm_target *ti, struct dm_dev *dev,
- sector_t start, sector_t len, void *data)
+static int queue_no_sg_merge(struct dm_target *ti, struct dm_dev *dev,
+ sector_t start, sector_t len, void *data)
{
struct request_queue *q = bdev_get_queue(dev->bdev);
- return q && !test_bit(QUEUE_FLAG_NO_SG_MERGE, &q->queue_flags);
-}
-
-static bool dm_table_all_devices_attribute(struct dm_table *t,
- iterate_devices_callout_fn func)
-{
- struct dm_target *ti;
- unsigned i;
-
- for (i = 0; i < dm_table_get_num_targets(t); i++) {
- ti = dm_table_get_target(t, i);
-
- if (!ti->type->iterate_devices ||
- !ti->type->iterate_devices(ti, func, NULL))
- return false;
- }
-
- return true;
+ return q && test_bit(QUEUE_FLAG_NO_SG_MERGE, &q->queue_flags);
}
-static int device_no_partial_completion(struct dm_target *ti, struct dm_dev *dev,
+static int device_is_partial_completion(struct dm_target *ti, struct dm_dev *dev,
sector_t start, sector_t len, void *data)
{
char b[BDEVNAME_SIZE];
/* For now, NVMe devices are the only devices of this class */
- return (strncmp(bdevname(dev->bdev, b), "nvme", 4) == 0);
+ return (strncmp(bdevname(dev->bdev, b), "nvme", 4) != 0);
}
static bool dm_table_does_not_support_partial_completion(struct dm_table *t)
{
- return dm_table_all_devices_attribute(t, device_no_partial_completion);
+ return !dm_table_any_dev_attr(t, device_is_partial_completion, NULL);
}
static int device_not_write_same_capable(struct dm_target *ti, struct dm_dev *dev,
@@ -1884,27 +1876,6 @@ static int device_requires_stable_pages(struct dm_target *ti,
return q && bdi_cap_stable_pages_required(q->backing_dev_info);
}
-/*
- * If any underlying device requires stable pages, a table must require
- * them as well. Only targets that support iterate_devices are considered:
- * don't want error, zero, etc to require stable pages.
- */
-static bool dm_table_requires_stable_pages(struct dm_table *t)
-{
- struct dm_target *ti;
- unsigned i;
-
- for (i = 0; i < dm_table_get_num_targets(t); i++) {
- ti = dm_table_get_target(t, i);
-
- if (ti->type->iterate_devices &&
- ti->type->iterate_devices(ti, device_requires_stable_pages, NULL))
- return true;
- }
-
- return false;
-}
-
void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
struct queue_limits *limits)
{
@@ -1941,32 +1912,35 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
else
blk_queue_flag_clear(QUEUE_FLAG_DAX, q);
- if (dm_table_supports_dax_write_cache(t))
+ if (dm_table_any_dev_attr(t, device_dax_write_cache_enabled, NULL))
dax_write_cache(t->md->dax_dev, true);
/* Ensure that all underlying devices are non-rotational. */
- if (dm_table_all_devices_attribute(t, device_is_nonrot))
- blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
- else
+ if (dm_table_any_dev_attr(t, device_is_rotational, NULL))
blk_queue_flag_clear(QUEUE_FLAG_NONROT, q);
+ else
+ blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
if (!dm_table_supports_write_same(t))
q->limits.max_write_same_sectors = 0;
if (!dm_table_supports_write_zeroes(t))
q->limits.max_write_zeroes_sectors = 0;
- if (dm_table_all_devices_attribute(t, queue_supports_sg_merge))
- blk_queue_flag_clear(QUEUE_FLAG_NO_SG_MERGE, q);
- else
+ if (dm_table_any_dev_attr(t, queue_no_sg_merge, NULL))
blk_queue_flag_set(QUEUE_FLAG_NO_SG_MERGE, q);
+ else
+ blk_queue_flag_clear(QUEUE_FLAG_NO_SG_MERGE, q);
dm_table_verify_integrity(t);
/*
* Some devices don't use blk_integrity but still want stable pages
* because they do their own checksumming.
+ * If any underlying device requires stable pages, a table must require
+ * them as well. Only targets that support iterate_devices are considered:
+ * don't want error, zero, etc to require stable pages.
*/
- if (dm_table_requires_stable_pages(t))
+ if (dm_table_any_dev_attr(t, device_requires_stable_pages, NULL))
q->backing_dev_info->capabilities |= BDI_CAP_STABLE_WRITES;
else
q->backing_dev_info->capabilities &= ~BDI_CAP_STABLE_WRITES;
@@ -1977,7 +1951,8 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
* Clear QUEUE_FLAG_ADD_RANDOM if any underlying device does not
* have it set.
*/
- if (blk_queue_add_random(q) && dm_table_all_devices_attribute(t, device_is_not_random))
+ if (blk_queue_add_random(q) &&
+ dm_table_any_dev_attr(t, device_is_not_random, NULL))
blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q);
}
diff --git a/drivers/md/dm-thin-metadata.c b/drivers/md/dm-thin-metadata.c
index 85077f4d257a..f374f593fe55 100644
--- a/drivers/md/dm-thin-metadata.c
+++ b/drivers/md/dm-thin-metadata.c
@@ -660,6 +660,15 @@ static int __open_metadata(struct dm_pool_metadata *pmd)
goto bad_cleanup_data_sm;
}
+ /*
+ * For pool metadata opening process, root setting is redundant
+ * because it will be set again in __begin_transaction(). But dm
+ * pool aborting process really needs to get last transaction's
+ * root to avoid accessing broken btree.
+ */
+ pmd->root = le64_to_cpu(disk_super->data_mapping_root);
+ pmd->details_root = le64_to_cpu(disk_super->device_details_root);
+
__setup_btree_details(pmd);
dm_bm_unlock(sblock);
@@ -901,7 +910,7 @@ int dm_pool_metadata_close(struct dm_pool_metadata *pmd)
return -EBUSY;
}
- if (!dm_bm_is_read_only(pmd->bm) && !pmd->fail_io) {
+ if (!pmd->fail_io && !dm_bm_is_read_only(pmd->bm)) {
r = __commit_transaction(pmd);
if (r < 0)
DMWARN("%s: __commit_transaction() failed, error = %d",
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index 435a2ee4a392..a1bbf00e60e5 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -2222,6 +2222,7 @@ static void process_thin_deferred_bios(struct thin_c *tc)
throttle_work_update(&pool->throttle);
dm_pool_issue_prefetches(pool->pmd);
}
+ cond_resched();
}
blk_finish_plug(&plug);
}
@@ -2305,6 +2306,7 @@ static void process_thin_deferred_cells(struct thin_c *tc)
else
pool->process_cell(tc, cell);
}
+ cond_resched();
} while (!list_empty(&cells));
}
@@ -2921,6 +2923,8 @@ static void __pool_destroy(struct pool *pool)
dm_bio_prison_destroy(pool->prison);
dm_kcopyd_client_destroy(pool->copier);
+ cancel_delayed_work_sync(&pool->waker);
+ cancel_delayed_work_sync(&pool->no_space_timeout);
if (pool->wq)
destroy_workqueue(pool->wq);
@@ -3361,6 +3365,7 @@ static int pool_ctr(struct dm_target *ti, unsigned argc, char **argv)
pt->low_water_blocks = low_water_blocks;
pt->adjusted_pf = pt->requested_pf = pf;
ti->num_flush_bios = 1;
+ ti->limit_swap_bios = true;
/*
* Only need to enable discards if the pool should pass
@@ -3547,20 +3552,28 @@ static int pool_preresume(struct dm_target *ti)
*/
r = bind_control_target(pool, ti);
if (r)
- return r;
+ goto out;
r = maybe_resize_data_dev(ti, &need_commit1);
if (r)
- return r;
+ goto out;
r = maybe_resize_metadata_dev(ti, &need_commit2);
if (r)
- return r;
+ goto out;
if (need_commit1 || need_commit2)
(void) commit(pool);
+out:
+ /*
+ * When a thin-pool is PM_FAIL, it cannot be rebuilt if
+ * bio is in deferred list. Therefore need to return 0
+ * to allow pool_resume() to flush IO.
+ */
+ if (r && get_pool_mode(pool) == PM_FAIL)
+ r = 0;
- return 0;
+ return r;
}
static void pool_suspend_active_thins(struct pool *pool)
@@ -4233,6 +4246,7 @@ static int thin_ctr(struct dm_target *ti, unsigned argc, char **argv)
goto bad;
ti->num_flush_bios = 1;
+ ti->limit_swap_bios = true;
ti->flush_supported = true;
ti->per_io_data_size = sizeof(struct dm_thin_endio_hook);
diff --git a/drivers/md/dm-verity-fec.c b/drivers/md/dm-verity-fec.c
index bb8327999705..67b533c19e26 100644
--- a/drivers/md/dm-verity-fec.c
+++ b/drivers/md/dm-verity-fec.c
@@ -28,7 +28,8 @@ bool verity_fec_is_enabled(struct dm_verity *v)
*/
static inline struct dm_verity_fec_io *fec_io(struct dm_verity_io *io)
{
- return (struct dm_verity_fec_io *) verity_io_digest_end(io->v, io);
+ return (struct dm_verity_fec_io *)
+ ((char *)io + io->v->ti->per_io_data_size - sizeof(struct dm_verity_fec_io));
}
/*
@@ -65,19 +66,18 @@ static int fec_decode_rs8(struct dm_verity *v, struct dm_verity_fec_io *fio,
static u8 *fec_read_parity(struct dm_verity *v, u64 rsb, int index,
unsigned *offset, struct dm_buffer **buf)
{
- u64 position, block;
+ u64 position, block, rem;
u8 *res;
position = (index + rsb) * v->fec->roots;
- block = position >> v->data_dev_block_bits;
- *offset = (unsigned)(position - (block << v->data_dev_block_bits));
+ block = div64_u64_rem(position, v->fec->io_size, &rem);
+ *offset = (unsigned)rem;
- res = dm_bufio_read(v->fec->bufio, v->fec->start + block, buf);
+ res = dm_bufio_read(v->fec->bufio, block, buf);
if (unlikely(IS_ERR(res))) {
DMERR("%s: FEC %llu: parity read failed (block %llu): %ld",
v->data_dev->name, (unsigned long long)rsb,
- (unsigned long long)(v->fec->start + block),
- PTR_ERR(res));
+ (unsigned long long)block, PTR_ERR(res));
*buf = NULL;
}
@@ -159,7 +159,7 @@ static int fec_decode_bufs(struct dm_verity *v, struct dm_verity_fec_io *fio,
/* read the next block when we run out of parity bytes */
offset += v->fec->roots;
- if (offset >= 1 << v->data_dev_block_bits) {
+ if (offset >= v->fec->io_size) {
dm_bufio_release(buf);
par = fec_read_parity(v, rsb, block_offset, &offset, &buf);
@@ -675,7 +675,7 @@ int verity_fec_ctr(struct dm_verity *v)
{
struct dm_verity_fec *f = v->fec;
struct dm_target *ti = v->ti;
- u64 hash_blocks;
+ u64 hash_blocks, fec_blocks;
int ret;
if (!verity_fec_is_enabled(v)) {
@@ -744,16 +744,23 @@ int verity_fec_ctr(struct dm_verity *v)
return -E2BIG;
}
+ if ((f->roots << SECTOR_SHIFT) & ((1 << v->data_dev_block_bits) - 1))
+ f->io_size = 1 << v->data_dev_block_bits;
+ else
+ f->io_size = v->fec->roots << SECTOR_SHIFT;
+
f->bufio = dm_bufio_client_create(f->dev->bdev,
- 1 << v->data_dev_block_bits,
+ f->io_size,
1, 0, NULL, NULL);
if (IS_ERR(f->bufio)) {
ti->error = "Cannot initialize FEC bufio client";
return PTR_ERR(f->bufio);
}
- if (dm_bufio_get_device_size(f->bufio) <
- ((f->start + f->rounds * f->roots) >> v->data_dev_block_bits)) {
+ dm_bufio_set_sector_offset(f->bufio, f->start << (v->data_dev_block_bits - SECTOR_SHIFT));
+
+ fec_blocks = div64_u64(f->rounds * f->roots, v->fec->roots << SECTOR_SHIFT);
+ if (dm_bufio_get_device_size(f->bufio) < fec_blocks) {
ti->error = "FEC device is too small";
return -E2BIG;
}
diff --git a/drivers/md/dm-verity-fec.h b/drivers/md/dm-verity-fec.h
index 6ad803b2b36c..b9f0bb0f63c4 100644
--- a/drivers/md/dm-verity-fec.h
+++ b/drivers/md/dm-verity-fec.h
@@ -40,6 +40,7 @@ struct dm_verity_fec {
struct dm_dev *dev; /* parity data device */
struct dm_bufio_client *data_bufio; /* for data dev access */
struct dm_bufio_client *bufio; /* for parity data access */
+ size_t io_size; /* IO size for roots */
sector_t start; /* parity data start in blocks */
sector_t blocks; /* number of blocks covered */
sector_t rounds; /* number of interleaving rounds */
diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c
index e3599b43f9eb..76d60c55d380 100644
--- a/drivers/md/dm-verity-target.c
+++ b/drivers/md/dm-verity-target.c
@@ -34,7 +34,7 @@
#define DM_VERITY_OPT_IGN_ZEROES "ignore_zero_blocks"
#define DM_VERITY_OPT_AT_MOST_ONCE "check_at_most_once"
-#define DM_VERITY_OPTS_MAX (2 + DM_VERITY_OPTS_FEC)
+#define DM_VERITY_OPTS_MAX (3 + DM_VERITY_OPTS_FEC)
static unsigned dm_verity_prefetch_cluster = DM_VERITY_DEFAULT_PREFETCH_SIZE;
@@ -471,13 +471,14 @@ static int verity_verify_io(struct dm_verity_io *io)
struct bvec_iter start;
unsigned b;
struct crypto_wait wait;
+ struct bio *bio = dm_bio_from_per_bio_data(io, v->ti->per_io_data_size);
for (b = 0; b < io->n_blocks; b++) {
int r;
sector_t cur_block = io->block + b;
struct ahash_request *req = verity_io_hash_req(v, io);
- if (v->validated_blocks &&
+ if (v->validated_blocks && bio->bi_status == BLK_STS_OK &&
likely(test_bit(cur_block, v->validated_blocks))) {
verity_bv_skip_block(v, io, &io->iter);
continue;
@@ -525,15 +526,32 @@ static int verity_verify_io(struct dm_verity_io *io)
else if (verity_fec_decode(v, io, DM_VERITY_BLOCK_TYPE_DATA,
cur_block, NULL, &start) == 0)
continue;
- else if (verity_handle_err(v, DM_VERITY_BLOCK_TYPE_DATA,
- cur_block))
- return -EIO;
+ else {
+ if (bio->bi_status) {
+ /*
+ * Error correction failed; Just return error
+ */
+ return -EIO;
+ }
+ if (verity_handle_err(v, DM_VERITY_BLOCK_TYPE_DATA,
+ cur_block))
+ return -EIO;
+ }
}
return 0;
}
/*
+ * Skip verity work in response to I/O error when system is shutting down.
+ */
+static inline bool verity_is_system_shutting_down(void)
+{
+ return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF
+ || system_state == SYSTEM_RESTART;
+}
+
+/*
* End one "io" structure with a given error.
*/
static void verity_finish_io(struct dm_verity_io *io, blk_status_t status)
@@ -560,7 +578,10 @@ static void verity_end_io(struct bio *bio)
{
struct dm_verity_io *io = bio->bi_private;
- if (bio->bi_status && !verity_fec_is_enabled(io->v)) {
+ if (bio->bi_status &&
+ (!verity_fec_is_enabled(io->v) ||
+ verity_is_system_shutting_down() ||
+ (bio->bi_opf & REQ_RAHEAD))) {
verity_finish_io(io, bio->bi_status);
return;
}
@@ -1166,6 +1187,7 @@ bad:
static struct target_type verity_target = {
.name = "verity",
+ .features = DM_TARGET_IMMUTABLE,
.version = {1, 4, 0},
.module = THIS_MODULE,
.ctr = verity_ctr,
diff --git a/drivers/md/dm-verity.h b/drivers/md/dm-verity.h
index 3441c10b840c..6e65ec0e627a 100644
--- a/drivers/md/dm-verity.h
+++ b/drivers/md/dm-verity.h
@@ -109,12 +109,6 @@ static inline u8 *verity_io_want_digest(struct dm_verity *v,
return (u8 *)(io + 1) + v->ahash_reqsize + v->digest_size;
}
-static inline u8 *verity_io_digest_end(struct dm_verity *v,
- struct dm_verity_io *io)
-{
- return verity_io_want_digest(v, io) + v->digest_size;
-}
-
extern int verity_for_bv_block(struct dm_verity *v, struct dm_verity_io *io,
struct bvec_iter *iter,
int (*process)(struct dm_verity *v,
diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c
index 776aaf5951e4..af5af0b78022 100644
--- a/drivers/md/dm-writecache.c
+++ b/drivers/md/dm-writecache.c
@@ -20,7 +20,7 @@
#define HIGH_WATERMARK 50
#define LOW_WATERMARK 45
-#define MAX_WRITEBACK_JOBS 0
+#define MAX_WRITEBACK_JOBS min(0x10000000 / PAGE_SIZE, totalram_pages / 16)
#define ENDIO_LATENCY 16
#define WRITEBACK_LATENCY 64
#define AUTOCOMMIT_BLOCKS_SSD 65536
@@ -142,6 +142,7 @@ struct dm_writecache {
size_t metadata_sectors;
size_t n_blocks;
uint64_t seq_count;
+ sector_t data_device_sectors;
void *block_start;
struct wc_entry *entries;
unsigned block_size;
@@ -153,6 +154,7 @@ struct dm_writecache {
bool overwrote_committed:1;
bool memory_vmapped:1;
+ bool start_sector_set:1;
bool high_wm_percent_set:1;
bool low_wm_percent_set:1;
bool max_writeback_jobs_set:1;
@@ -161,6 +163,10 @@ struct dm_writecache {
bool writeback_fua_set:1;
bool flush_on_suspend:1;
+ unsigned high_wm_percent_value;
+ unsigned low_wm_percent_value;
+ unsigned autocommit_time_value;
+
unsigned writeback_all;
struct workqueue_struct *writeback_wq;
struct work_struct writeback_work;
@@ -318,7 +324,7 @@ err1:
#else
static int persistent_memory_claim(struct dm_writecache *wc)
{
- BUG();
+ return -EOPNOTSUPP;
}
#endif
@@ -924,6 +930,8 @@ static void writecache_resume(struct dm_target *ti)
wc_lock(wc);
+ wc->data_device_sectors = i_size_read(wc->dev->bdev->bd_inode) >> SECTOR_SHIFT;
+
if (WC_MODE_PMEM(wc)) {
persistent_memory_invalidate_cache(wc->memory_map, wc->memory_map_size);
} else {
@@ -1494,6 +1502,10 @@ static bool wc_add_block(struct writeback_struct *wb, struct wc_entry *e, gfp_t
void *address = memory_data(wc, e);
persistent_memory_flush_cache(address, block_size);
+
+ if (unlikely(bio_end_sector(&wb->bio) >= wc->data_device_sectors))
+ return true;
+
return bio_add_page(&wb->bio, persistent_memory_page(address),
block_size, persistent_memory_page_offset(address)) != 0;
}
@@ -1566,6 +1578,9 @@ static void __writecache_writeback_pmem(struct dm_writecache *wc, struct writeba
if (writecache_has_error(wc)) {
bio->bi_status = BLK_STS_IOERR;
bio_endio(&wb->bio);
+ } else if (unlikely(!bio_sectors(&wb->bio))) {
+ bio->bi_status = BLK_STS_OK;
+ bio_endio(&wb->bio);
} else {
submit_bio(&wb->bio);
}
@@ -1609,6 +1624,14 @@ static void __writecache_writeback_ssd(struct dm_writecache *wc, struct writebac
e = f;
}
+ if (unlikely(to.sector + to.count > wc->data_device_sectors)) {
+ if (to.sector >= wc->data_device_sectors) {
+ writecache_copy_endio(0, 0, c);
+ continue;
+ }
+ from.count = to.count = wc->data_device_sectors - to.sector;
+ }
+
dm_kcopyd_copy(wc->dm_kcopyd, &from, 1, &to, 0, writecache_copy_endio, c);
__writeback_throttle(wc, wbl);
@@ -1883,7 +1906,7 @@ static int writecache_ctr(struct dm_target *ti, unsigned argc, char **argv)
struct wc_memory_superblock s;
static struct dm_arg _args[] = {
- {0, 10, "Invalid number of feature args"},
+ {0, 16, "Invalid number of feature args"},
};
as.argc = argc;
@@ -2045,6 +2068,7 @@ static int writecache_ctr(struct dm_target *ti, unsigned argc, char **argv)
if (sscanf(string, "%llu%c", &start_sector, &dummy) != 1)
goto invalid_optional;
wc->start_sector = start_sector;
+ wc->start_sector_set = true;
if (wc->start_sector != start_sector ||
wc->start_sector >= wc->memory_map_size >> SECTOR_SHIFT)
goto invalid_optional;
@@ -2054,6 +2078,7 @@ static int writecache_ctr(struct dm_target *ti, unsigned argc, char **argv)
goto invalid_optional;
if (high_wm_percent < 0 || high_wm_percent > 100)
goto invalid_optional;
+ wc->high_wm_percent_value = high_wm_percent;
wc->high_wm_percent_set = true;
} else if (!strcasecmp(string, "low_watermark") && opt_params >= 1) {
string = dm_shift_arg(&as), opt_params--;
@@ -2061,6 +2086,7 @@ static int writecache_ctr(struct dm_target *ti, unsigned argc, char **argv)
goto invalid_optional;
if (low_wm_percent < 0 || low_wm_percent > 100)
goto invalid_optional;
+ wc->low_wm_percent_value = low_wm_percent;
wc->low_wm_percent_set = true;
} else if (!strcasecmp(string, "writeback_jobs") && opt_params >= 1) {
string = dm_shift_arg(&as), opt_params--;
@@ -2080,6 +2106,7 @@ static int writecache_ctr(struct dm_target *ti, unsigned argc, char **argv)
if (autocommit_msecs > 3600000)
goto invalid_optional;
wc->autocommit_jiffies = msecs_to_jiffies(autocommit_msecs);
+ wc->autocommit_time_value = autocommit_msecs;
wc->autocommit_time_set = true;
} else if (!strcasecmp(string, "fua")) {
if (WC_MODE_PMEM(wc)) {
@@ -2275,7 +2302,6 @@ static void writecache_status(struct dm_target *ti, status_type_t type,
struct dm_writecache *wc = ti->private;
unsigned extra_args;
unsigned sz = 0;
- uint64_t x;
switch (type) {
case STATUSTYPE_INFO:
@@ -2287,7 +2313,7 @@ static void writecache_status(struct dm_target *ti, status_type_t type,
DMEMIT("%c %s %s %u ", WC_MODE_PMEM(wc) ? 'p' : 's',
wc->dev->name, wc->ssd_dev->name, wc->block_size);
extra_args = 0;
- if (wc->start_sector)
+ if (wc->start_sector_set)
extra_args += 2;
if (wc->high_wm_percent_set)
extra_args += 2;
@@ -2303,26 +2329,18 @@ static void writecache_status(struct dm_target *ti, status_type_t type,
extra_args++;
DMEMIT("%u", extra_args);
- if (wc->start_sector)
+ if (wc->start_sector_set)
DMEMIT(" start_sector %llu", (unsigned long long)wc->start_sector);
- if (wc->high_wm_percent_set) {
- x = (uint64_t)wc->freelist_high_watermark * 100;
- x += wc->n_blocks / 2;
- do_div(x, (size_t)wc->n_blocks);
- DMEMIT(" high_watermark %u", 100 - (unsigned)x);
- }
- if (wc->low_wm_percent_set) {
- x = (uint64_t)wc->freelist_low_watermark * 100;
- x += wc->n_blocks / 2;
- do_div(x, (size_t)wc->n_blocks);
- DMEMIT(" low_watermark %u", 100 - (unsigned)x);
- }
+ if (wc->high_wm_percent_set)
+ DMEMIT(" high_watermark %u", wc->high_wm_percent_value);
+ if (wc->low_wm_percent_set)
+ DMEMIT(" low_watermark %u", wc->low_wm_percent_value);
if (wc->max_writeback_jobs_set)
DMEMIT(" writeback_jobs %u", wc->max_writeback_jobs);
if (wc->autocommit_blocks_set)
DMEMIT(" autocommit_blocks %u", wc->autocommit_blocks);
if (wc->autocommit_time_set)
- DMEMIT(" autocommit_time %u", jiffies_to_msecs(wc->autocommit_jiffies));
+ DMEMIT(" autocommit_time %u", wc->autocommit_time_value);
if (wc->writeback_fua_set)
DMEMIT(" %sfua", wc->writeback_fua ? "" : "no");
break;
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 874bd542a744..9a9b2adcf39e 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -146,6 +146,16 @@ EXPORT_SYMBOL_GPL(dm_bio_get_target_bio_nr);
#define DM_NUMA_NODE NUMA_NO_NODE
static int dm_numa_node = DM_NUMA_NODE;
+#define DEFAULT_SWAP_BIOS (8 * 1048576 / PAGE_SIZE)
+static int swap_bios = DEFAULT_SWAP_BIOS;
+static int get_swap_bios(void)
+{
+ int latch = READ_ONCE(swap_bios);
+ if (unlikely(latch <= 0))
+ latch = DEFAULT_SWAP_BIOS;
+ return latch;
+}
+
/*
* For mempools pre-allocation at the table loading time.
*/
@@ -269,7 +279,6 @@ out_free_rq_tio_cache:
static void local_exit(void)
{
- flush_scheduled_work();
destroy_workqueue(deferred_remove_workqueue);
kmem_cache_destroy(_rq_cache);
@@ -462,7 +471,6 @@ static int dm_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
static int dm_prepare_ioctl(struct mapped_device *md, int *srcu_idx,
struct block_device **bdev)
- __acquires(md->io_barrier)
{
struct dm_target *tgt;
struct dm_table *map;
@@ -496,7 +504,6 @@ retry:
}
static void dm_unprepare_ioctl(struct mapped_device *md, int srcu_idx)
- __releases(md->io_barrier)
{
dm_put_live_table(md, srcu_idx);
}
@@ -517,7 +524,7 @@ static int dm_blk_ioctl(struct block_device *bdev, fmode_t mode,
* subset of the parent bdev; require extra privileges.
*/
if (!capable(CAP_SYS_RAWIO)) {
- DMWARN_LIMIT(
+ DMDEBUG_LIMIT(
"%s: sending ioctl %x to DM device without required privilege.",
current->comm, cmd);
r = -ENOIOCTLCMD;
@@ -623,21 +630,20 @@ static void start_io_acct(struct dm_io *io)
false, 0, &io->stats_aux);
}
-static void end_io_acct(struct dm_io *io)
+static void end_io_acct(struct mapped_device *md, struct bio *bio,
+ unsigned long start_time, struct dm_stats_aux *stats_aux)
{
- struct mapped_device *md = io->md;
- struct bio *bio = io->orig_bio;
- unsigned long duration = jiffies - io->start_time;
+ unsigned long duration = jiffies - start_time;
int pending;
int rw = bio_data_dir(bio);
generic_end_io_acct(md->queue, bio_op(bio), &dm_disk(md)->part0,
- io->start_time);
+ start_time);
if (unlikely(dm_stats_used(&md->stats)))
dm_stats_account_io(&md->stats, bio_data_dir(bio),
bio->bi_iter.bi_sector, bio_sectors(bio),
- true, duration, &io->stats_aux);
+ true, duration, stats_aux);
/*
* After this is decremented the bio must not be touched if it is
@@ -864,6 +870,8 @@ static void dec_pending(struct dm_io *io, blk_status_t error)
blk_status_t io_error;
struct bio *bio;
struct mapped_device *md = io->md;
+ unsigned long start_time = 0;
+ struct dm_stats_aux stats_aux;
/* Push-back supersedes any I/O errors */
if (unlikely(error)) {
@@ -890,8 +898,10 @@ static void dec_pending(struct dm_io *io, blk_status_t error)
io_error = io->status;
bio = io->orig_bio;
- end_io_acct(io);
+ start_time = io->start_time;
+ stats_aux = io->stats_aux;
free_io(md, io);
+ end_io_acct(md, bio, start_time, &stats_aux);
if (io_error == BLK_STS_DM_REQUEUE)
return;
@@ -937,6 +947,11 @@ void disable_write_zeroes(struct mapped_device *md)
limits->max_write_zeroes_sectors = 0;
}
+static bool swap_bios_limit(struct dm_target *ti, struct bio *bio)
+{
+ return unlikely((bio->bi_opf & REQ_SWAP) != 0) && unlikely(ti->limit_swap_bios);
+}
+
static void clone_endio(struct bio *bio)
{
blk_status_t error = bio->bi_status;
@@ -974,6 +989,11 @@ static void clone_endio(struct bio *bio)
}
}
+ if (unlikely(swap_bios_limit(tio->ti, bio))) {
+ struct mapped_device *md = io->md;
+ up(&md->swap_bios_semaphore);
+ }
+
free_tio(tio);
dec_pending(io, error);
}
@@ -1252,6 +1272,22 @@ void dm_remap_zone_report(struct dm_target *ti, struct bio *bio, sector_t start)
}
EXPORT_SYMBOL_GPL(dm_remap_zone_report);
+static noinline void __set_swap_bios_limit(struct mapped_device *md, int latch)
+{
+ mutex_lock(&md->swap_bios_lock);
+ while (latch < md->swap_bios) {
+ cond_resched();
+ down(&md->swap_bios_semaphore);
+ md->swap_bios--;
+ }
+ while (latch > md->swap_bios) {
+ cond_resched();
+ up(&md->swap_bios_semaphore);
+ md->swap_bios++;
+ }
+ mutex_unlock(&md->swap_bios_lock);
+}
+
static blk_qc_t __map_bio(struct dm_target_io *tio)
{
int r;
@@ -1272,6 +1308,14 @@ static blk_qc_t __map_bio(struct dm_target_io *tio)
atomic_inc(&io->io_count);
sector = clone->bi_iter.bi_sector;
+ if (unlikely(swap_bios_limit(ti, clone))) {
+ struct mapped_device *md = io->md;
+ int latch = get_swap_bios();
+ if (unlikely(latch != md->swap_bios))
+ __set_swap_bios_limit(md, latch);
+ down(&md->swap_bios_semaphore);
+ }
+
r = ti->type->map(ti, clone);
switch (r) {
case DM_MAPIO_SUBMITTED:
@@ -1286,10 +1330,18 @@ static blk_qc_t __map_bio(struct dm_target_io *tio)
ret = generic_make_request(clone);
break;
case DM_MAPIO_KILL:
+ if (unlikely(swap_bios_limit(ti, clone))) {
+ struct mapped_device *md = io->md;
+ up(&md->swap_bios_semaphore);
+ }
free_tio(tio);
dec_pending(io, BLK_STS_IOERR);
break;
case DM_MAPIO_REQUEUE:
+ if (unlikely(swap_bios_limit(ti, clone))) {
+ struct mapped_device *md = io->md;
+ up(&md->swap_bios_semaphore);
+ }
free_tio(tio);
dec_pending(io, BLK_STS_DM_REQUEUE);
break;
@@ -1861,6 +1913,7 @@ static void cleanup_mapped_device(struct mapped_device *md)
mutex_destroy(&md->suspend_lock);
mutex_destroy(&md->type_lock);
mutex_destroy(&md->table_devices_lock);
+ mutex_destroy(&md->swap_bios_lock);
dm_mq_cleanup_mapped_device(md);
}
@@ -1935,6 +1988,10 @@ static struct mapped_device *alloc_dev(int minor)
init_completion(&md->kobj_holder.completion);
md->kworker_task = NULL;
+ md->swap_bios = get_swap_bios();
+ sema_init(&md->swap_bios_semaphore, md->swap_bios);
+ mutex_init(&md->swap_bios_lock);
+
md->disk->major = _major;
md->disk->first_minor = minor;
md->disk->fops = &dm_blk_dops;
@@ -1964,7 +2021,9 @@ static struct mapped_device *alloc_dev(int minor)
bio_set_dev(&md->flush_bio, md->bdev);
md->flush_bio.bi_opf = REQ_OP_WRITE | REQ_PREFLUSH | REQ_SYNC;
- dm_stats_init(&md->stats);
+ r = dm_stats_init(&md->stats);
+ if (r < 0)
+ goto bad;
/* Populate the mapping, nobody knows we exist yet */
spin_lock(&_minor_lock);
@@ -2417,6 +2476,8 @@ static int dm_wait_for_completion(struct mapped_device *md, long task_state)
}
finish_wait(&md->wait, &wait);
+ smp_rmb(); /* paired with atomic_dec_return in end_io_acct */
+
return r;
}
@@ -3062,6 +3123,11 @@ static int dm_call_pr(struct block_device *bdev, iterate_devices_callout_fn fn,
goto out;
ti = dm_table_get_target(table, 0);
+ if (dm_suspended_md(md)) {
+ ret = -EAGAIN;
+ goto out;
+ }
+
ret = -EINVAL;
if (!ti->type->iterate_devices)
goto out;
@@ -3230,6 +3296,9 @@ MODULE_PARM_DESC(reserved_bio_based_ios, "Reserved IOs in bio-based mempools");
module_param(dm_numa_node, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(dm_numa_node, "NUMA node for DM device memory allocations");
+module_param(swap_bios, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(swap_bios, "Maximum allowed inflight swap IOs");
+
MODULE_DESCRIPTION(DM_NAME " driver");
MODULE_AUTHOR("Joe Thornber <dm-devel@redhat.com>");
MODULE_LICENSE("GPL");
diff --git a/drivers/md/md-bitmap.c b/drivers/md/md-bitmap.c
index fd8607124bdb..7ca81e917aef 100644
--- a/drivers/md/md-bitmap.c
+++ b/drivers/md/md-bitmap.c
@@ -53,14 +53,7 @@ __acquires(bitmap->lock)
{
unsigned char *mappage;
- if (page >= bitmap->pages) {
- /* This can happen if bitmap_start_sync goes beyond
- * End-of-device while looking for a whole page.
- * It is harmless.
- */
- return -EINVAL;
- }
-
+ WARN_ON_ONCE(page >= bitmap->pages);
if (bitmap->bp[page].hijacked) /* it's hijacked, don't try to alloc */
return 0;
@@ -488,7 +481,7 @@ void md_bitmap_print_sb(struct bitmap *bitmap)
sb = kmap_atomic(bitmap->storage.sb_page);
pr_debug("%s: bitmap file superblock:\n", bmname(bitmap));
pr_debug(" magic: %08x\n", le32_to_cpu(sb->magic));
- pr_debug(" version: %d\n", le32_to_cpu(sb->version));
+ pr_debug(" version: %u\n", le32_to_cpu(sb->version));
pr_debug(" uuid: %08x.%08x.%08x.%08x\n",
le32_to_cpu(*(__u32 *)(sb->uuid+0)),
le32_to_cpu(*(__u32 *)(sb->uuid+4)),
@@ -499,11 +492,11 @@ void md_bitmap_print_sb(struct bitmap *bitmap)
pr_debug("events cleared: %llu\n",
(unsigned long long) le64_to_cpu(sb->events_cleared));
pr_debug(" state: %08x\n", le32_to_cpu(sb->state));
- pr_debug(" chunksize: %d B\n", le32_to_cpu(sb->chunksize));
- pr_debug(" daemon sleep: %ds\n", le32_to_cpu(sb->daemon_sleep));
+ pr_debug(" chunksize: %u B\n", le32_to_cpu(sb->chunksize));
+ pr_debug(" daemon sleep: %us\n", le32_to_cpu(sb->daemon_sleep));
pr_debug(" sync size: %llu KB\n",
(unsigned long long)le64_to_cpu(sb->sync_size)/2);
- pr_debug("max write behind: %d\n", le32_to_cpu(sb->write_behind));
+ pr_debug("max write behind: %u\n", le32_to_cpu(sb->write_behind));
kunmap_atomic(sb);
}
@@ -641,14 +634,6 @@ re_read:
daemon_sleep = le32_to_cpu(sb->daemon_sleep) * HZ;
write_behind = le32_to_cpu(sb->write_behind);
sectors_reserved = le32_to_cpu(sb->sectors_reserved);
- /* Setup nodes/clustername only if bitmap version is
- * cluster-compatible
- */
- if (sb->version == cpu_to_le32(BITMAP_MAJOR_CLUSTERED)) {
- nodes = le32_to_cpu(sb->nodes);
- strlcpy(bitmap->mddev->bitmap_info.cluster_name,
- sb->cluster_name, 64);
- }
/* verify that the bitmap-specific fields are valid */
if (sb->magic != cpu_to_le32(BITMAP_MAGIC))
@@ -670,6 +655,16 @@ re_read:
goto out;
}
+ /*
+ * Setup nodes/clustername only if bitmap version is
+ * cluster-compatible
+ */
+ if (sb->version == cpu_to_le32(BITMAP_MAJOR_CLUSTERED)) {
+ nodes = le32_to_cpu(sb->nodes);
+ strlcpy(bitmap->mddev->bitmap_info.cluster_name,
+ sb->cluster_name, 64);
+ }
+
/* keep the array size field of the bitmap superblock up to date */
sb->sync_size = cpu_to_le64(bitmap->mddev->resync_max_sectors);
@@ -702,9 +697,9 @@ re_read:
out:
kunmap_atomic(sb);
- /* Assigning chunksize is required for "re_read" */
- bitmap->mddev->bitmap_info.chunksize = chunksize;
if (err == 0 && nodes && (bitmap->cluster_slot < 0)) {
+ /* Assigning chunksize is required for "re_read" */
+ bitmap->mddev->bitmap_info.chunksize = chunksize;
err = md_setup_cluster(bitmap->mddev, nodes);
if (err) {
pr_warn("%s: Could not setup cluster service (%d)\n",
@@ -715,18 +710,18 @@ out:
goto re_read;
}
-
out_no_sb:
- if (test_bit(BITMAP_STALE, &bitmap->flags))
- bitmap->events_cleared = bitmap->mddev->events;
- bitmap->mddev->bitmap_info.chunksize = chunksize;
- bitmap->mddev->bitmap_info.daemon_sleep = daemon_sleep;
- bitmap->mddev->bitmap_info.max_write_behind = write_behind;
- bitmap->mddev->bitmap_info.nodes = nodes;
- if (bitmap->mddev->bitmap_info.space == 0 ||
- bitmap->mddev->bitmap_info.space > sectors_reserved)
- bitmap->mddev->bitmap_info.space = sectors_reserved;
- if (err) {
+ if (err == 0) {
+ if (test_bit(BITMAP_STALE, &bitmap->flags))
+ bitmap->events_cleared = bitmap->mddev->events;
+ bitmap->mddev->bitmap_info.chunksize = chunksize;
+ bitmap->mddev->bitmap_info.daemon_sleep = daemon_sleep;
+ bitmap->mddev->bitmap_info.max_write_behind = write_behind;
+ bitmap->mddev->bitmap_info.nodes = nodes;
+ if (bitmap->mddev->bitmap_info.space == 0 ||
+ bitmap->mddev->bitmap_info.space > sectors_reserved)
+ bitmap->mddev->bitmap_info.space = sectors_reserved;
+ } else {
md_bitmap_print_sb(bitmap);
if (bitmap->cluster_slot < 0)
md_cluster_stop(bitmap->mddev);
@@ -1366,12 +1361,20 @@ __acquires(bitmap->lock)
sector_t csize;
int err;
+ if (page >= bitmap->pages) {
+ /*
+ * This can happen if bitmap_start_sync goes beyond
+ * End-of-device while looking for a whole page or
+ * user set a huge number to sysfs bitmap_set_bits.
+ */
+ return NULL;
+ }
err = md_bitmap_checkpage(bitmap, page, create, 0);
if (bitmap->bp[page].hijacked ||
bitmap->bp[page].map == NULL)
csize = ((sector_t)1) << (bitmap->chunkshift +
- PAGE_COUNTER_SHIFT - 1);
+ PAGE_COUNTER_SHIFT);
else
csize = ((sector_t)1) << bitmap->chunkshift;
*blocks = csize - (offset & (csize - 1));
@@ -1725,6 +1728,8 @@ void md_bitmap_flush(struct mddev *mddev)
md_bitmap_daemon_work(mddev);
bitmap->daemon_lastrun -= sleep;
md_bitmap_daemon_work(mddev);
+ if (mddev->bitmap_info.external)
+ md_super_wait(mddev);
md_bitmap_update_sb(bitmap);
}
@@ -2097,7 +2102,8 @@ int md_bitmap_resize(struct bitmap *bitmap, sector_t blocks,
bytes = DIV_ROUND_UP(chunks, 8);
if (!bitmap->mddev->bitmap_info.external)
bytes += sizeof(bitmap_super_t);
- } while (bytes > (space << 9));
+ } while (bytes > (space << 9) && (chunkshift + BITMAP_BLOCK_SHIFT) <
+ (BITS_PER_BYTE * sizeof(((bitmap_super_t *)0)->chunksize) - 1));
} else
chunkshift = ffz(~chunksize) - BITMAP_BLOCK_SHIFT;
@@ -2142,7 +2148,7 @@ int md_bitmap_resize(struct bitmap *bitmap, sector_t blocks,
bitmap->counts.missing_pages = pages;
bitmap->counts.chunkshift = chunkshift;
bitmap->counts.chunks = chunks;
- bitmap->mddev->bitmap_info.chunksize = 1 << (chunkshift +
+ bitmap->mddev->bitmap_info.chunksize = 1UL << (chunkshift +
BITMAP_BLOCK_SHIFT);
blocks = min(old_counts.chunks << old_counts.chunkshift,
@@ -2168,8 +2174,8 @@ int md_bitmap_resize(struct bitmap *bitmap, sector_t blocks,
bitmap->counts.missing_pages = old_counts.pages;
bitmap->counts.chunkshift = old_counts.chunkshift;
bitmap->counts.chunks = old_counts.chunks;
- bitmap->mddev->bitmap_info.chunksize = 1 << (old_counts.chunkshift +
- BITMAP_BLOCK_SHIFT);
+ bitmap->mddev->bitmap_info.chunksize =
+ 1UL << (old_counts.chunkshift + BITMAP_BLOCK_SHIFT);
blocks = old_counts.chunks << old_counts.chunkshift;
pr_warn("Could not pre-allocate in-memory bitmap for cluster raid\n");
break;
@@ -2187,20 +2193,23 @@ int md_bitmap_resize(struct bitmap *bitmap, sector_t blocks,
if (set) {
bmc_new = md_bitmap_get_counter(&bitmap->counts, block, &new_blocks, 1);
- if (*bmc_new == 0) {
- /* need to set on-disk bits too. */
- sector_t end = block + new_blocks;
- sector_t start = block >> chunkshift;
- start <<= chunkshift;
- while (start < end) {
- md_bitmap_file_set_bit(bitmap, block);
- start += 1 << chunkshift;
+ if (bmc_new) {
+ if (*bmc_new == 0) {
+ /* need to set on-disk bits too. */
+ sector_t end = block + new_blocks;
+ sector_t start = block >> chunkshift;
+
+ start <<= chunkshift;
+ while (start < end) {
+ md_bitmap_file_set_bit(bitmap, block);
+ start += 1 << chunkshift;
+ }
+ *bmc_new = 2;
+ md_bitmap_count_page(&bitmap->counts, block, 1);
+ md_bitmap_set_pending(&bitmap->counts, block);
}
- *bmc_new = 2;
- md_bitmap_count_page(&bitmap->counts, block, 1);
- md_bitmap_set_pending(&bitmap->counts, block);
+ *bmc_new |= NEEDED_MASK;
}
- *bmc_new |= NEEDED_MASK;
if (new_blocks < old_blocks)
old_blocks = new_blocks;
}
@@ -2492,6 +2501,9 @@ chunksize_store(struct mddev *mddev, const char *buf, size_t len)
if (csize < 512 ||
!is_power_of_2(csize))
return -EINVAL;
+ if (BITS_PER_LONG > 32 && csize >= (1ULL << (BITS_PER_BYTE *
+ sizeof(((bitmap_super_t *)0)->chunksize))))
+ return -EOVERFLOW;
mddev->bitmap_info.chunksize = csize;
return len;
}
diff --git a/drivers/md/md-cluster.c b/drivers/md/md-cluster.c
index 4522e87d9d68..107f36b9155f 100644
--- a/drivers/md/md-cluster.c
+++ b/drivers/md/md-cluster.c
@@ -669,9 +669,27 @@ out:
* Takes the lock on the TOKEN lock resource so no other
* node can communicate while the operation is underway.
*/
-static int lock_token(struct md_cluster_info *cinfo, bool mddev_locked)
+static int lock_token(struct md_cluster_info *cinfo)
{
- int error, set_bit = 0;
+ int error;
+
+ error = dlm_lock_sync(cinfo->token_lockres, DLM_LOCK_EX);
+ if (error) {
+ pr_err("md-cluster(%s:%d): failed to get EX on TOKEN (%d)\n",
+ __func__, __LINE__, error);
+ } else {
+ /* Lock the receive sequence */
+ mutex_lock(&cinfo->recv_mutex);
+ }
+ return error;
+}
+
+/* lock_comm()
+ * Sets the MD_CLUSTER_SEND_LOCK bit to lock the send channel.
+ */
+static int lock_comm(struct md_cluster_info *cinfo, bool mddev_locked)
+{
+ int rv, set_bit = 0;
struct mddev *mddev = cinfo->mddev;
/*
@@ -682,34 +700,19 @@ static int lock_token(struct md_cluster_info *cinfo, bool mddev_locked)
*/
if (mddev_locked && !test_bit(MD_CLUSTER_HOLDING_MUTEX_FOR_RECVD,
&cinfo->state)) {
- error = test_and_set_bit_lock(MD_CLUSTER_HOLDING_MUTEX_FOR_RECVD,
+ rv = test_and_set_bit_lock(MD_CLUSTER_HOLDING_MUTEX_FOR_RECVD,
&cinfo->state);
- WARN_ON_ONCE(error);
+ WARN_ON_ONCE(rv);
md_wakeup_thread(mddev->thread);
set_bit = 1;
}
- error = dlm_lock_sync(cinfo->token_lockres, DLM_LOCK_EX);
- if (set_bit)
- clear_bit_unlock(MD_CLUSTER_HOLDING_MUTEX_FOR_RECVD, &cinfo->state);
- if (error)
- pr_err("md-cluster(%s:%d): failed to get EX on TOKEN (%d)\n",
- __func__, __LINE__, error);
-
- /* Lock the receive sequence */
- mutex_lock(&cinfo->recv_mutex);
- return error;
-}
-
-/* lock_comm()
- * Sets the MD_CLUSTER_SEND_LOCK bit to lock the send channel.
- */
-static int lock_comm(struct md_cluster_info *cinfo, bool mddev_locked)
-{
wait_event(cinfo->wait,
!test_and_set_bit(MD_CLUSTER_SEND_LOCK, &cinfo->state));
-
- return lock_token(cinfo, mddev_locked);
+ rv = lock_token(cinfo);
+ if (set_bit)
+ clear_bit_unlock(MD_CLUSTER_HOLDING_MUTEX_FOR_RECVD, &cinfo->state);
+ return rv;
}
static void unlock_comm(struct md_cluster_info *cinfo)
@@ -789,9 +792,11 @@ static int sendmsg(struct md_cluster_info *cinfo, struct cluster_msg *cmsg,
{
int ret;
- lock_comm(cinfo, mddev_locked);
- ret = __sendmsg(cinfo, cmsg);
- unlock_comm(cinfo);
+ ret = lock_comm(cinfo, mddev_locked);
+ if (!ret) {
+ ret = __sendmsg(cinfo, cmsg);
+ unlock_comm(cinfo);
+ }
return ret;
}
@@ -1063,7 +1068,7 @@ static int metadata_update_start(struct mddev *mddev)
return 0;
}
- ret = lock_token(cinfo, 1);
+ ret = lock_token(cinfo);
clear_bit_unlock(MD_CLUSTER_HOLDING_MUTEX_FOR_RECVD, &cinfo->state);
return ret;
}
@@ -1181,7 +1186,10 @@ static void update_size(struct mddev *mddev, sector_t old_dev_sectors)
int raid_slot = -1;
md_update_sb(mddev, 1);
- lock_comm(cinfo, 1);
+ if (lock_comm(cinfo, 1)) {
+ pr_err("%s: lock_comm failed\n", __func__);
+ return;
+ }
memset(&cmsg, 0, sizeof(cmsg));
cmsg.type = cpu_to_le32(METADATA_UPDATED);
@@ -1330,7 +1338,8 @@ static int add_new_disk(struct mddev *mddev, struct md_rdev *rdev)
cmsg.type = cpu_to_le32(NEWDISK);
memcpy(cmsg.uuid, uuid, 16);
cmsg.raid_slot = cpu_to_le32(rdev->desc_nr);
- lock_comm(cinfo, 1);
+ if (lock_comm(cinfo, 1))
+ return -EAGAIN;
ret = __sendmsg(cinfo, &cmsg);
if (ret) {
unlock_comm(cinfo);
diff --git a/drivers/md/md.c b/drivers/md/md.c
index a4e7e6c025d9..6b074c2202d5 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -417,13 +417,14 @@ static void md_end_flush(struct bio *bio)
struct md_rdev *rdev = bio->bi_private;
struct mddev *mddev = rdev->mddev;
+ bio_put(bio);
+
rdev_dec_pending(rdev, mddev);
if (atomic_dec_and_test(&mddev->flush_pending)) {
/* The pre-request flush has finished */
queue_work(md_wq, &mddev->flush_work);
}
- bio_put(bio);
}
static void md_submit_flush_data(struct work_struct *ws);
@@ -474,8 +475,10 @@ static void md_submit_flush_data(struct work_struct *ws)
* could wait for this and below md_handle_request could wait for those
* bios because of suspend check
*/
+ spin_lock_irq(&mddev->lock);
mddev->last_flush = mddev->start_flush;
mddev->flush_bio = NULL;
+ spin_unlock_irq(&mddev->lock);
wake_up(&mddev->sb_wait);
if (bio->bi_iter.bi_size == 0) {
@@ -581,8 +584,35 @@ void mddev_init(struct mddev *mddev)
}
EXPORT_SYMBOL_GPL(mddev_init);
+static struct mddev *mddev_find_locked(dev_t unit)
+{
+ struct mddev *mddev;
+
+ list_for_each_entry(mddev, &all_mddevs, all_mddevs)
+ if (mddev->unit == unit)
+ return mddev;
+
+ return NULL;
+}
+
static struct mddev *mddev_find(dev_t unit)
{
+ struct mddev *mddev;
+
+ if (MAJOR(unit) != MD_MAJOR)
+ unit &= ~((1 << MdpMinorShift) - 1);
+
+ spin_lock(&all_mddevs_lock);
+ mddev = mddev_find_locked(unit);
+ if (mddev)
+ mddev_get(mddev);
+ spin_unlock(&all_mddevs_lock);
+
+ return mddev;
+}
+
+static struct mddev *mddev_find_or_alloc(dev_t unit)
+{
struct mddev *mddev, *new = NULL;
if (unit && MAJOR(unit) != MD_MAJOR)
@@ -592,13 +622,13 @@ static struct mddev *mddev_find(dev_t unit)
spin_lock(&all_mddevs_lock);
if (unit) {
- list_for_each_entry(mddev, &all_mddevs, all_mddevs)
- if (mddev->unit == unit) {
- mddev_get(mddev);
- spin_unlock(&all_mddevs_lock);
- kfree(new);
- return mddev;
- }
+ mddev = mddev_find_locked(unit);
+ if (mddev) {
+ mddev_get(mddev);
+ spin_unlock(&all_mddevs_lock);
+ kfree(new);
+ return mddev;
+ }
if (new) {
list_add(&new->all_mddevs, &all_mddevs);
@@ -624,12 +654,7 @@ static struct mddev *mddev_find(dev_t unit)
return NULL;
}
- is_free = 1;
- list_for_each_entry(mddev, &all_mddevs, all_mddevs)
- if (mddev->unit == dev) {
- is_free = 0;
- break;
- }
+ is_free = !mddev_find_locked(dev);
}
new->unit = dev;
new->md_minor = MINOR(dev);
@@ -797,10 +822,12 @@ static void super_written(struct bio *bio)
} else
clear_bit(LastDev, &rdev->flags);
+ bio_put(bio);
+
+ rdev_dec_pending(rdev, mddev);
+
if (atomic_dec_and_test(&mddev->pending_writes))
wake_up(&mddev->sb_wait);
- rdev_dec_pending(rdev, mddev);
- bio_put(bio);
}
void md_super_write(struct mddev *mddev, struct md_rdev *rdev,
@@ -2419,14 +2446,16 @@ static void sync_sbs(struct mddev *mddev, int nospares)
static bool does_sb_need_changing(struct mddev *mddev)
{
- struct md_rdev *rdev;
+ struct md_rdev *rdev = NULL, *iter;
struct mdp_superblock_1 *sb;
int role;
/* Find a good rdev */
- rdev_for_each(rdev, mddev)
- if ((rdev->raid_disk >= 0) && !test_bit(Faulty, &rdev->flags))
+ rdev_for_each(iter, mddev)
+ if ((iter->raid_disk >= 0) && !test_bit(Faulty, &iter->flags)) {
+ rdev = iter;
break;
+ }
/* No good device found. */
if (!rdev)
@@ -2962,6 +2991,9 @@ slot_store(struct md_rdev *rdev, const char *buf, size_t len)
err = kstrtouint(buf, 10, (unsigned int *)&slot);
if (err < 0)
return err;
+ if (slot < 0)
+ /* overflow */
+ return -ENOSPC;
}
if (rdev->mddev->pers && slot == -1) {
/* Setting 'slot' on an active array requires also
@@ -3639,8 +3671,9 @@ int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale)
static ssize_t
safe_delay_show(struct mddev *mddev, char *page)
{
- int msec = (mddev->safemode_delay*1000)/HZ;
- return sprintf(page, "%d.%03d\n", msec/1000, msec%1000);
+ unsigned int msec = ((unsigned long)mddev->safemode_delay*1000)/HZ;
+
+ return sprintf(page, "%u.%03u\n", msec/1000, msec%1000);
}
static ssize_t
safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len)
@@ -3652,7 +3685,7 @@ safe_delay_store(struct mddev *mddev, const char *cbuf, size_t len)
return -EINVAL;
}
- if (strict_strtoul_scaled(cbuf, &msec, 3) < 0)
+ if (strict_strtoul_scaled(cbuf, &msec, 3) < 0 || msec > UINT_MAX / HZ)
return -EINVAL;
if (msec == 0)
mddev->safemode_delay = 0;
@@ -4304,6 +4337,8 @@ max_corrected_read_errors_store(struct mddev *mddev, const char *buf, size_t len
rv = kstrtouint(buf, 10, &n);
if (rv < 0)
return rv;
+ if (n > INT_MAX)
+ return -EINVAL;
atomic_set(&mddev->max_corr_read_errors, n);
return len;
}
@@ -4604,11 +4639,21 @@ action_store(struct mddev *mddev, const char *page, size_t len)
return -EINVAL;
err = mddev_lock(mddev);
if (!err) {
- if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery))
+ if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) {
err = -EBUSY;
- else {
+ } else if (mddev->reshape_position == MaxSector ||
+ mddev->pers->check_reshape == NULL ||
+ mddev->pers->check_reshape(mddev)) {
clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
err = mddev->pers->start_reshape(mddev);
+ } else {
+ /*
+ * If reshape is still in progress, and
+ * md_check_recovery() can continue to reshape,
+ * don't restart reshape because data can be
+ * corrupted for raid456.
+ */
+ clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
}
mddev_unlock(mddev);
}
@@ -5300,7 +5345,7 @@ static int md_alloc(dev_t dev, char *name)
* writing to /sys/module/md_mod/parameters/new_array.
*/
static DEFINE_MUTEX(disks_mutex);
- struct mddev *mddev = mddev_find(dev);
+ struct mddev *mddev = mddev_find_or_alloc(dev);
struct gendisk *disk;
int partitioned;
int shift;
@@ -5377,10 +5422,6 @@ static int md_alloc(dev_t dev, char *name)
*/
disk->flags |= GENHD_FL_EXT_DEVT;
mddev->gendisk = disk;
- /* As soon as we call add_disk(), another thread could get
- * through to md_open, so make sure it doesn't get too far
- */
- mutex_lock(&mddev->open_mutex);
add_disk(disk);
error = kobject_add(&mddev->kobj, &disk_to_dev(disk)->kobj, "%s", "md");
@@ -5395,7 +5436,6 @@ static int md_alloc(dev_t dev, char *name)
if (mddev->kobj.sd &&
sysfs_create_group(&mddev->kobj, &md_bitmap_group))
pr_debug("pointless warning\n");
- mutex_unlock(&mddev->open_mutex);
abort:
mutex_unlock(&disks_mutex);
if (!error && mddev->kobj.sd) {
@@ -5916,6 +5956,7 @@ void md_stop(struct mddev *mddev)
/* stop the array and free an attached data structures.
* This is called from dm-raid
*/
+ __md_stop_writes(mddev);
__md_stop(mddev);
bioset_exit(&mddev->bio_set);
bioset_exit(&mddev->sync_set);
@@ -6153,11 +6194,9 @@ static void autorun_devices(int part)
md_probe(dev, NULL, NULL);
mddev = mddev_find(dev);
- if (!mddev || !mddev->gendisk) {
- if (mddev)
- mddev_put(mddev);
+ if (!mddev)
break;
- }
+
if (mddev_lock(mddev))
pr_warn("md: %s locked, cannot run\n", mdname(mddev));
else if (mddev->raid_disks || mddev->major_version
@@ -6564,8 +6603,10 @@ static int hot_remove_disk(struct mddev *mddev, dev_t dev)
goto busy;
kick_rdev:
- if (mddev_is_clustered(mddev))
- md_cluster_ops->remove_disk(mddev, rdev);
+ if (mddev_is_clustered(mddev)) {
+ if (md_cluster_ops->remove_disk(mddev, rdev))
+ goto busy;
+ }
md_kick_rdev_from_array(rdev);
set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
@@ -6895,6 +6936,7 @@ static int update_raid_disks(struct mddev *mddev, int raid_disks)
return -EINVAL;
if (mddev->sync_thread ||
test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) ||
+ test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) ||
mddev->reshape_position != MaxSector)
return -EBUSY;
@@ -7214,8 +7256,11 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
err = -EBUSY;
goto out;
}
- WARN_ON_ONCE(test_bit(MD_CLOSING, &mddev->flags));
- set_bit(MD_CLOSING, &mddev->flags);
+ if (test_and_set_bit(MD_CLOSING, &mddev->flags)) {
+ mutex_unlock(&mddev->open_mutex);
+ err = -EBUSY;
+ goto out;
+ }
did_set_md_closing = true;
mutex_unlock(&mddev->open_mutex);
sync_blockdev(bdev);
@@ -7453,8 +7498,7 @@ static int md_open(struct block_device *bdev, fmode_t mode)
/* Wait until bdev->bd_disk is definitely gone */
if (work_pending(&mddev->del_work))
flush_workqueue(md_misc_wq);
- /* Then retry the open from the top */
- return -ERESTARTSYS;
+ return -EBUSY;
}
BUG_ON(mddev != bdev->bd_disk->private_data);
@@ -7596,17 +7640,22 @@ EXPORT_SYMBOL(md_register_thread);
void md_unregister_thread(struct md_thread **threadp)
{
- struct md_thread *thread = *threadp;
- if (!thread)
- return;
- pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk));
- /* Locking ensures that mddev_unlock does not wake_up a
+ struct md_thread *thread;
+
+ /*
+ * Locking ensures that mddev_unlock does not wake_up a
* non-existent thread
*/
spin_lock(&pers_lock);
+ thread = *threadp;
+ if (!thread) {
+ spin_unlock(&pers_lock);
+ return;
+ }
*threadp = NULL;
spin_unlock(&pers_lock);
+ pr_debug("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk));
kthread_stop(thread->tsk);
kfree(thread);
}
@@ -7787,7 +7836,11 @@ static void *md_seq_start(struct seq_file *seq, loff_t *pos)
loff_t l = *pos;
struct mddev *mddev;
- if (l >= 0x10000)
+ if (l == 0x10000) {
+ ++*pos;
+ return (void *)2;
+ }
+ if (l > 0x10000)
return NULL;
if (!l--)
/* header */
@@ -8875,11 +8928,11 @@ void md_check_recovery(struct mddev *mddev)
}
if (mddev_is_clustered(mddev)) {
- struct md_rdev *rdev;
+ struct md_rdev *rdev, *tmp;
/* kick the device if another node issued a
* remove disk.
*/
- rdev_for_each(rdev, mddev) {
+ rdev_for_each_safe(rdev, tmp, mddev) {
if (test_and_clear_bit(ClusterRemove, &rdev->flags) &&
rdev->raid_disk < 0)
md_kick_rdev_from_array(rdev);
@@ -9179,7 +9232,7 @@ err_wq:
static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev)
{
struct mdp_superblock_1 *sb = page_address(rdev->sb_page);
- struct md_rdev *rdev2;
+ struct md_rdev *rdev2, *tmp;
int role, ret;
char b[BDEVNAME_SIZE];
@@ -9196,7 +9249,7 @@ static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev)
}
/* Check for change of roles in the active devices */
- rdev_for_each(rdev2, mddev) {
+ rdev_for_each_safe(rdev2, tmp, mddev) {
if (test_bit(Faulty, &rdev2->flags))
continue;
@@ -9238,8 +9291,11 @@ static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev)
}
}
- if (mddev->raid_disks != le32_to_cpu(sb->raid_disks))
- update_raid_disks(mddev, le32_to_cpu(sb->raid_disks));
+ if (mddev->raid_disks != le32_to_cpu(sb->raid_disks)) {
+ ret = update_raid_disks(mddev, le32_to_cpu(sb->raid_disks));
+ if (ret)
+ pr_warn("md: updating array disks failed. %d\n", ret);
+ }
/* Finally set the event to be up to date */
mddev->events = le64_to_cpu(sb->events);
@@ -9294,16 +9350,18 @@ static int read_rdev(struct mddev *mddev, struct md_rdev *rdev)
void md_reload_sb(struct mddev *mddev, int nr)
{
- struct md_rdev *rdev;
+ struct md_rdev *rdev = NULL, *iter;
int err;
/* Find the rdev */
- rdev_for_each_rcu(rdev, mddev) {
- if (rdev->desc_nr == nr)
+ rdev_for_each_rcu(iter, mddev) {
+ if (iter->desc_nr == nr) {
+ rdev = iter;
break;
+ }
}
- if (!rdev || rdev->desc_nr != nr) {
+ if (!rdev) {
pr_warn("%s: %d Could not find rdev with nr %d\n", __func__, __LINE__, nr);
return;
}
diff --git a/drivers/md/persistent-data/dm-block-manager.c b/drivers/md/persistent-data/dm-block-manager.c
index 492a3f8ac119..0401daa0f7fb 100644
--- a/drivers/md/persistent-data/dm-block-manager.c
+++ b/drivers/md/persistent-data/dm-block-manager.c
@@ -494,7 +494,7 @@ int dm_bm_write_lock(struct dm_block_manager *bm,
void *p;
int r;
- if (bm->read_only)
+ if (dm_bm_is_read_only(bm))
return -EPERM;
p = dm_bufio_read(bm->bufio, b, (struct dm_buffer **) result);
@@ -563,7 +563,7 @@ int dm_bm_write_lock_zero(struct dm_block_manager *bm,
struct buffer_aux *aux;
void *p;
- if (bm->read_only)
+ if (dm_bm_is_read_only(bm))
return -EPERM;
p = dm_bufio_new(bm->bufio, b, (struct dm_buffer **) result);
@@ -603,7 +603,7 @@ EXPORT_SYMBOL_GPL(dm_bm_unlock);
int dm_bm_flush(struct dm_block_manager *bm)
{
- if (bm->read_only)
+ if (dm_bm_is_read_only(bm))
return -EPERM;
return dm_bufio_write_dirty_buffers(bm->bufio);
@@ -617,19 +617,21 @@ void dm_bm_prefetch(struct dm_block_manager *bm, dm_block_t b)
bool dm_bm_is_read_only(struct dm_block_manager *bm)
{
- return bm->read_only;
+ return (bm ? bm->read_only : true);
}
EXPORT_SYMBOL_GPL(dm_bm_is_read_only);
void dm_bm_set_read_only(struct dm_block_manager *bm)
{
- bm->read_only = true;
+ if (bm)
+ bm->read_only = true;
}
EXPORT_SYMBOL_GPL(dm_bm_set_read_only);
void dm_bm_set_read_write(struct dm_block_manager *bm)
{
- bm->read_only = false;
+ if (bm)
+ bm->read_only = false;
}
EXPORT_SYMBOL_GPL(dm_bm_set_read_write);
diff --git a/drivers/md/persistent-data/dm-btree-internal.h b/drivers/md/persistent-data/dm-btree-internal.h
index a240990a7f33..5673f8eb5f88 100644
--- a/drivers/md/persistent-data/dm-btree-internal.h
+++ b/drivers/md/persistent-data/dm-btree-internal.h
@@ -34,12 +34,12 @@ struct node_header {
__le32 max_entries;
__le32 value_size;
__le32 padding;
-} __packed;
+} __attribute__((packed, aligned(8)));
struct btree_node {
struct node_header header;
__le64 keys[0];
-} __packed;
+} __attribute__((packed, aligned(8)));
/*
diff --git a/drivers/md/persistent-data/dm-btree-remove.c b/drivers/md/persistent-data/dm-btree-remove.c
index eff04fa23dfa..63f2baed3c8a 100644
--- a/drivers/md/persistent-data/dm-btree-remove.c
+++ b/drivers/md/persistent-data/dm-btree-remove.c
@@ -423,9 +423,9 @@ static int rebalance_children(struct shadow_spine *s,
memcpy(n, dm_block_data(child),
dm_bm_block_size(dm_tm_get_bm(info->tm)));
- dm_tm_unlock(info->tm, child);
dm_tm_dec(info->tm, dm_block_location(child));
+ dm_tm_unlock(info->tm, child);
return 0;
}
@@ -549,7 +549,8 @@ int dm_btree_remove(struct dm_btree_info *info, dm_block_t root,
delete_at(n, index);
}
- *new_root = shadow_root(&spine);
+ if (!r)
+ *new_root = shadow_root(&spine);
exit_shadow_spine(&spine);
return r;
diff --git a/drivers/md/persistent-data/dm-btree.c b/drivers/md/persistent-data/dm-btree.c
index 8aae0624a297..6383afb88f31 100644
--- a/drivers/md/persistent-data/dm-btree.c
+++ b/drivers/md/persistent-data/dm-btree.c
@@ -83,14 +83,16 @@ void inc_children(struct dm_transaction_manager *tm, struct btree_node *n,
}
static int insert_at(size_t value_size, struct btree_node *node, unsigned index,
- uint64_t key, void *value)
- __dm_written_to_disk(value)
+ uint64_t key, void *value)
+ __dm_written_to_disk(value)
{
uint32_t nr_entries = le32_to_cpu(node->header.nr_entries);
+ uint32_t max_entries = le32_to_cpu(node->header.max_entries);
__le64 key_le = cpu_to_le64(key);
if (index > nr_entries ||
- index >= le32_to_cpu(node->header.max_entries)) {
+ index >= max_entries ||
+ nr_entries >= max_entries) {
DMERR("too many entries in btree node for insert");
__dm_unbless_for_disk(value);
return -ENOMEM;
diff --git a/drivers/md/persistent-data/dm-space-map-common.c b/drivers/md/persistent-data/dm-space-map-common.c
index 17aef55ed708..5115a2719603 100644
--- a/drivers/md/persistent-data/dm-space-map-common.c
+++ b/drivers/md/persistent-data/dm-space-map-common.c
@@ -279,6 +279,11 @@ int sm_ll_lookup_bitmap(struct ll_disk *ll, dm_block_t b, uint32_t *result)
struct disk_index_entry ie_disk;
struct dm_block *blk;
+ if (b >= ll->nr_blocks) {
+ DMERR_LIMIT("metadata block out of bounds");
+ return -EINVAL;
+ }
+
b = do_div(index, ll->entries_per_block);
r = ll->load_ie(ll, index, &ie_disk);
if (r < 0)
@@ -337,6 +342,8 @@ int sm_ll_find_free_block(struct ll_disk *ll, dm_block_t begin,
*/
begin = do_div(index_begin, ll->entries_per_block);
end = do_div(end, ll->entries_per_block);
+ if (end == 0)
+ end = ll->entries_per_block;
for (i = index_begin; i < index_end; i++, begin = 0) {
struct dm_block *blk;
diff --git a/drivers/md/persistent-data/dm-space-map-common.h b/drivers/md/persistent-data/dm-space-map-common.h
index 8de63ce39bdd..87e17909ef52 100644
--- a/drivers/md/persistent-data/dm-space-map-common.h
+++ b/drivers/md/persistent-data/dm-space-map-common.h
@@ -33,7 +33,7 @@ struct disk_index_entry {
__le64 blocknr;
__le32 nr_free;
__le32 none_free_before;
-} __packed;
+} __attribute__ ((packed, aligned(8)));
#define MAX_METADATA_BITMAPS 255
@@ -43,7 +43,7 @@ struct disk_metadata_index {
__le64 blocknr;
struct disk_index_entry index[MAX_METADATA_BITMAPS];
-} __packed;
+} __attribute__ ((packed, aligned(8)));
struct ll_disk;
@@ -86,7 +86,7 @@ struct disk_sm_root {
__le64 nr_allocated;
__le64 bitmap_root;
__le64 ref_count_root;
-} __packed;
+} __attribute__ ((packed, aligned(8)));
#define ENTRIES_PER_BYTE 4
@@ -94,7 +94,7 @@ struct disk_bitmap_header {
__le32 csum;
__le32 not_used;
__le64 blocknr;
-} __packed;
+} __attribute__ ((packed, aligned(8)));
enum allocation_event {
SM_NONE,
diff --git a/drivers/md/persistent-data/dm-space-map-disk.c b/drivers/md/persistent-data/dm-space-map-disk.c
index bf4c5e2ccb6f..e0acae7a3815 100644
--- a/drivers/md/persistent-data/dm-space-map-disk.c
+++ b/drivers/md/persistent-data/dm-space-map-disk.c
@@ -171,6 +171,14 @@ static int sm_disk_new_block(struct dm_space_map *sm, dm_block_t *b)
* Any block we allocate has to be free in both the old and current ll.
*/
r = sm_ll_find_common_free_block(&smd->old_ll, &smd->ll, smd->begin, smd->ll.nr_blocks, b);
+ if (r == -ENOSPC) {
+ /*
+ * There's no free block between smd->begin and the end of the metadata device.
+ * We search before smd->begin in case something has been freed.
+ */
+ r = sm_ll_find_common_free_block(&smd->old_ll, &smd->ll, 0, smd->begin, b);
+ }
+
if (r)
return r;
@@ -199,7 +207,6 @@ static int sm_disk_commit(struct dm_space_map *sm)
return r;
memcpy(&smd->old_ll, &smd->ll, sizeof(smd->old_ll));
- smd->begin = 0;
smd->nr_allocated_this_transaction = 0;
r = sm_disk_get_nr_free(sm, &nr_free);
diff --git a/drivers/md/persistent-data/dm-space-map-metadata.c b/drivers/md/persistent-data/dm-space-map-metadata.c
index 9e3c64ec2026..da439ac85796 100644
--- a/drivers/md/persistent-data/dm-space-map-metadata.c
+++ b/drivers/md/persistent-data/dm-space-map-metadata.c
@@ -452,6 +452,14 @@ static int sm_metadata_new_block_(struct dm_space_map *sm, dm_block_t *b)
* Any block we allocate has to be free in both the old and current ll.
*/
r = sm_ll_find_common_free_block(&smm->old_ll, &smm->ll, smm->begin, smm->ll.nr_blocks, b);
+ if (r == -ENOSPC) {
+ /*
+ * There's no free block between smm->begin and the end of the metadata device.
+ * We search before smm->begin in case something has been freed.
+ */
+ r = sm_ll_find_common_free_block(&smm->old_ll, &smm->ll, 0, smm->begin, b);
+ }
+
if (r)
return r;
@@ -503,7 +511,6 @@ static int sm_metadata_commit(struct dm_space_map *sm)
return r;
memcpy(&smm->old_ll, &smm->ll, sizeof(smm->old_ll));
- smm->begin = 0;
smm->allocated_this_transaction = 0;
return 0;
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 0272102b207e..6f5710e833c1 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -70,8 +70,8 @@ static void dump_zones(struct mddev *mddev)
int len = 0;
for (k = 0; k < conf->strip_zone[j].nb_dev; k++)
- len += snprintf(line+len, 200-len, "%s%s", k?"/":"",
- bdevname(conf->devlist[j*raid_disks
+ len += scnprintf(line+len, 200-len, "%s%s", k?"/":"",
+ bdevname(conf->devlist[j*raid_disks
+ k]->bdev, b));
pr_debug("md: zone%d=[%s]\n", j, line);
@@ -150,21 +150,6 @@ static int create_strip_zones(struct mddev *mddev, struct r0conf **private_conf)
pr_debug("md/raid0:%s: FINAL %d zones\n",
mdname(mddev), conf->nr_strip_zones);
- if (conf->nr_strip_zones == 1) {
- conf->layout = RAID0_ORIG_LAYOUT;
- } else if (mddev->layout == RAID0_ORIG_LAYOUT ||
- mddev->layout == RAID0_ALT_MULTIZONE_LAYOUT) {
- conf->layout = mddev->layout;
- } else if (default_layout == RAID0_ORIG_LAYOUT ||
- default_layout == RAID0_ALT_MULTIZONE_LAYOUT) {
- conf->layout = default_layout;
- } else {
- pr_err("md/raid0:%s: cannot assemble multi-zone RAID0 with default_layout setting\n",
- mdname(mddev));
- pr_err("md/raid0: please set raid0.default_layout to 1 or 2\n");
- err = -ENOTSUPP;
- goto abort;
- }
/*
* now since we have the hard sector sizes, we can make sure
* chunk size is a multiple of that sector size
@@ -295,6 +280,34 @@ static int create_strip_zones(struct mddev *mddev, struct r0conf **private_conf)
(unsigned long long)smallest->sectors);
}
+ if (conf->nr_strip_zones == 1 || conf->strip_zone[1].nb_dev == 1) {
+ conf->layout = RAID0_ORIG_LAYOUT;
+ } else if (mddev->layout == RAID0_ORIG_LAYOUT ||
+ mddev->layout == RAID0_ALT_MULTIZONE_LAYOUT) {
+ conf->layout = mddev->layout;
+ } else if (default_layout == RAID0_ORIG_LAYOUT ||
+ default_layout == RAID0_ALT_MULTIZONE_LAYOUT) {
+ conf->layout = default_layout;
+ } else {
+ pr_err("md/raid0:%s: cannot assemble multi-zone RAID0 with default_layout setting\n",
+ mdname(mddev));
+ pr_err("md/raid0: please set raid0.default_layout to 1 or 2\n");
+ err = -EOPNOTSUPP;
+ goto abort;
+ }
+
+ if (conf->layout == RAID0_ORIG_LAYOUT) {
+ for (i = 1; i < conf->nr_strip_zones; i++) {
+ sector_t first_sector = conf->strip_zone[i-1].zone_end;
+
+ sector_div(first_sector, mddev->chunk_sectors);
+ zone = conf->strip_zone + i;
+ /* disk_shift is first disk index used in the zone */
+ zone->disk_shift = sector_div(first_sector,
+ zone->nb_dev);
+ }
+ }
+
pr_debug("md/raid0:%s: done.\n", mdname(mddev));
*private_conf = conf;
@@ -481,6 +494,20 @@ static inline int is_io_in_chunk_boundary(struct mddev *mddev,
}
}
+/*
+ * Convert disk_index to the disk order in which it is read/written.
+ * For example, if we have 4 disks, they are numbered 0,1,2,3. If we
+ * write the disks starting at disk 3, then the read/write order would
+ * be disk 3, then 0, then 1, and then disk 2 and we want map_disk_shift()
+ * to map the disks as follows 0,1,2,3 => 1,2,3,0. So disk 0 would map
+ * to 1, 1 to 2, 2 to 3, and 3 to 0. That way we can compare disks in
+ * that 'output' space to understand the read/write disk ordering.
+ */
+static int map_disk_shift(int disk_index, int num_disks, int disk_shift)
+{
+ return ((disk_index + num_disks - disk_shift) % num_disks);
+}
+
static void raid0_handle_discard(struct mddev *mddev, struct bio *bio)
{
struct r0conf *conf = mddev->private;
@@ -494,7 +521,9 @@ static void raid0_handle_discard(struct mddev *mddev, struct bio *bio)
sector_t end_disk_offset;
unsigned int end_disk_index;
unsigned int disk;
+ sector_t orig_start, orig_end;
+ orig_start = start;
zone = find_zone(conf, &start);
if (bio_end_sector(bio) > zone->zone_end) {
@@ -508,6 +537,7 @@ static void raid0_handle_discard(struct mddev *mddev, struct bio *bio)
} else
end = bio_end_sector(bio);
+ orig_end = end;
if (zone != conf->strip_zone)
end = end - zone[-1].zone_end;
@@ -519,13 +549,26 @@ static void raid0_handle_discard(struct mddev *mddev, struct bio *bio)
last_stripe_index = end;
sector_div(last_stripe_index, stripe_size);
- start_disk_index = (int)(start - first_stripe_index * stripe_size) /
- mddev->chunk_sectors;
+ /* In the first zone the original and alternate layouts are the same */
+ if ((conf->layout == RAID0_ORIG_LAYOUT) && (zone != conf->strip_zone)) {
+ sector_div(orig_start, mddev->chunk_sectors);
+ start_disk_index = sector_div(orig_start, zone->nb_dev);
+ start_disk_index = map_disk_shift(start_disk_index,
+ zone->nb_dev,
+ zone->disk_shift);
+ sector_div(orig_end, mddev->chunk_sectors);
+ end_disk_index = sector_div(orig_end, zone->nb_dev);
+ end_disk_index = map_disk_shift(end_disk_index,
+ zone->nb_dev, zone->disk_shift);
+ } else {
+ start_disk_index = (int)(start - first_stripe_index * stripe_size) /
+ mddev->chunk_sectors;
+ end_disk_index = (int)(end - last_stripe_index * stripe_size) /
+ mddev->chunk_sectors;
+ }
start_disk_offset = ((int)(start - first_stripe_index * stripe_size) %
mddev->chunk_sectors) +
first_stripe_index * mddev->chunk_sectors;
- end_disk_index = (int)(end - last_stripe_index * stripe_size) /
- mddev->chunk_sectors;
end_disk_offset = ((int)(end - last_stripe_index * stripe_size) %
mddev->chunk_sectors) +
last_stripe_index * mddev->chunk_sectors;
@@ -534,18 +577,22 @@ static void raid0_handle_discard(struct mddev *mddev, struct bio *bio)
sector_t dev_start, dev_end;
struct bio *discard_bio = NULL;
struct md_rdev *rdev;
+ int compare_disk;
+
+ compare_disk = map_disk_shift(disk, zone->nb_dev,
+ zone->disk_shift);
- if (disk < start_disk_index)
+ if (compare_disk < start_disk_index)
dev_start = (first_stripe_index + 1) *
mddev->chunk_sectors;
- else if (disk > start_disk_index)
+ else if (compare_disk > start_disk_index)
dev_start = first_stripe_index * mddev->chunk_sectors;
else
dev_start = start_disk_offset;
- if (disk < end_disk_index)
+ if (compare_disk < end_disk_index)
dev_end = (last_stripe_index + 1) * mddev->chunk_sectors;
- else if (disk > end_disk_index)
+ else if (compare_disk > end_disk_index)
dev_end = last_stripe_index * mddev->chunk_sectors;
else
dev_end = end_disk_offset;
diff --git a/drivers/md/raid0.h b/drivers/md/raid0.h
index 3816e5477db1..8cc761ca7423 100644
--- a/drivers/md/raid0.h
+++ b/drivers/md/raid0.h
@@ -6,6 +6,7 @@ struct strip_zone {
sector_t zone_end; /* Start of the next zone (in sectors) */
sector_t dev_start; /* Zone offset in real dev (in sectors) */
int nb_dev; /* # of devices attached to the zone */
+ int disk_shift; /* start disk for the original layout */
};
/* Linux 3.14 (20d0189b101) made an unintended change to
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index abcb4c3a76c1..5ff06fbcfabf 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -445,6 +445,8 @@ static void raid1_end_write_request(struct bio *bio)
if (!test_bit(Faulty, &rdev->flags))
set_bit(R1BIO_WriteError, &r1_bio->state);
else {
+ /* Fail the request */
+ set_bit(R1BIO_Degraded, &r1_bio->state);
/* Finished with this branch */
r1_bio->bios[mirror] = NULL;
to_put = bio;
@@ -1783,6 +1785,9 @@ static int raid1_remove_disk(struct mddev *mddev, struct md_rdev *rdev)
int number = rdev->raid_disk;
struct raid1_info *p = conf->mirrors + number;
+ if (unlikely(number >= conf->raid_disks))
+ goto abort;
+
if (rdev != p->rdev)
p = conf->mirrors + conf->raid_disks + number;
@@ -3108,6 +3113,7 @@ static int raid1_run(struct mddev *mddev)
* RAID1 needs at least one disk in active
*/
if (conf->raid_disks - mddev->degraded < 1) {
+ md_unregister_thread(&conf->thread);
ret = -EINVAL;
goto abort;
}
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 02c5e390f89f..bee694be2013 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -781,8 +781,16 @@ static struct md_rdev *read_balance(struct r10conf *conf,
disk = r10_bio->devs[slot].devnum;
rdev = rcu_dereference(conf->mirrors[disk].replacement);
if (rdev == NULL || test_bit(Faulty, &rdev->flags) ||
- r10_bio->devs[slot].addr + sectors > rdev->recovery_offset)
+ r10_bio->devs[slot].addr + sectors >
+ rdev->recovery_offset) {
+ /*
+ * Read replacement first to prevent reading both rdev
+ * and replacement as NULL during replacement replace
+ * rdev.
+ */
+ smp_mb();
rdev = rcu_dereference(conf->mirrors[disk].rdev);
+ }
if (rdev == NULL ||
test_bit(Faulty, &rdev->flags))
continue;
@@ -934,6 +942,7 @@ static void flush_pending_writes(struct r10conf *conf)
else
generic_make_request(bio);
bio = next;
+ cond_resched();
}
blk_finish_plug(&plug);
} else
@@ -1119,6 +1128,7 @@ static void raid10_unplug(struct blk_plug_cb *cb, bool from_schedule)
else
generic_make_request(bio);
bio = next;
+ cond_resched();
}
kfree(plug);
}
@@ -1138,7 +1148,7 @@ static void raid10_read_request(struct mddev *mddev, struct bio *bio,
struct md_rdev *err_rdev = NULL;
gfp_t gfp = GFP_NOIO;
- if (r10_bio->devs[slot].rdev) {
+ if (slot >= 0 && r10_bio->devs[slot].rdev) {
/*
* This is an error retry, but we cannot
* safely dereference the rdev in the r10_bio,
@@ -1400,9 +1410,15 @@ retry_write:
for (i = 0; i < conf->copies; i++) {
int d = r10_bio->devs[i].devnum;
- struct md_rdev *rdev = rcu_dereference(conf->mirrors[d].rdev);
- struct md_rdev *rrdev = rcu_dereference(
- conf->mirrors[d].replacement);
+ struct md_rdev *rdev, *rrdev;
+
+ rrdev = rcu_dereference(conf->mirrors[d].replacement);
+ /*
+ * Read replacement first to prevent reading both rdev and
+ * replacement as NULL during replacement replace rdev.
+ */
+ smp_mb();
+ rdev = rcu_dereference(conf->mirrors[d].rdev);
if (rdev == rrdev)
rrdev = NULL;
if (rdev && unlikely(test_bit(Blocked, &rdev->flags))) {
@@ -1547,6 +1563,7 @@ static void __make_request(struct mddev *mddev, struct bio *bio, int sectors)
r10_bio->mddev = mddev;
r10_bio->sector = bio->bi_iter.bi_sector;
r10_bio->state = 0;
+ r10_bio->read_slot = -1;
memset(r10_bio->devs, 0, sizeof(r10_bio->devs[0]) * conf->copies);
if (bio_data_dir(bio) == READ)
@@ -1862,9 +1879,12 @@ static int raid10_remove_disk(struct mddev *mddev, struct md_rdev *rdev)
int err = 0;
int number = rdev->raid_disk;
struct md_rdev **rdevp;
- struct raid10_info *p = conf->mirrors + number;
+ struct raid10_info *p;
print_conf(conf);
+ if (unlikely(number >= mddev->raid_disks))
+ return 0;
+ p = conf->mirrors + number;
if (rdev == p->rdev)
rdevp = &p->rdev;
else if (rdev == p->replacement)
@@ -2262,11 +2282,22 @@ static void recovery_request_write(struct mddev *mddev, struct r10bio *r10_bio)
{
struct r10conf *conf = mddev->private;
int d;
- struct bio *wbio, *wbio2;
+ struct bio *wbio = r10_bio->devs[1].bio;
+ struct bio *wbio2 = r10_bio->devs[1].repl_bio;
+
+ /* Need to test wbio2->bi_end_io before we call
+ * generic_make_request as if the former is NULL,
+ * the latter is free to free wbio2.
+ */
+ if (wbio2 && !wbio2->bi_end_io)
+ wbio2 = NULL;
if (!test_bit(R10BIO_Uptodate, &r10_bio->state)) {
fix_recovery_read_error(r10_bio);
- end_sync_request(r10_bio);
+ if (wbio->bi_end_io)
+ end_sync_request(r10_bio);
+ if (wbio2)
+ end_sync_request(r10_bio);
return;
}
@@ -2275,14 +2306,6 @@ static void recovery_request_write(struct mddev *mddev, struct r10bio *r10_bio)
* and submit the write request
*/
d = r10_bio->devs[1].devnum;
- wbio = r10_bio->devs[1].bio;
- wbio2 = r10_bio->devs[1].repl_bio;
- /* Need to test wbio2->bi_end_io before we call
- * generic_make_request as if the former is NULL,
- * the latter is free to free wbio2.
- */
- if (wbio2 && !wbio2->bi_end_io)
- wbio2 = NULL;
if (wbio->bi_end_io) {
atomic_inc(&conf->mirrors[d].rdev->nr_pending);
md_sync_acct(conf->mirrors[d].rdev->bdev, bio_sectors(wbio));
@@ -2950,10 +2973,6 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
sector_t chunk_mask = conf->geo.chunk_mask;
int page_idx = 0;
- if (!mempool_initialized(&conf->r10buf_pool))
- if (init_resync(conf))
- return 0;
-
/*
* Allow skipping a full rebuild for incremental assembly
* of a clean array, like RAID1 does.
@@ -2969,6 +2988,10 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
return mddev->dev_sectors - sector_nr;
}
+ if (!mempool_initialized(&conf->r10buf_pool))
+ if (init_resync(conf))
+ return 0;
+
skipped:
max_sector = mddev->dev_sectors;
if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ||
@@ -3664,6 +3687,20 @@ static int setup_geo(struct geom *geo, struct mddev *mddev, enum geo_type new)
return nc*fc;
}
+static void raid10_free_conf(struct r10conf *conf)
+{
+ if (!conf)
+ return;
+
+ mempool_exit(&conf->r10bio_pool);
+ kfree(conf->mirrors);
+ kfree(conf->mirrors_old);
+ kfree(conf->mirrors_new);
+ safe_put_page(conf->tmppage);
+ bioset_exit(&conf->bio_split);
+ kfree(conf);
+}
+
static struct r10conf *setup_conf(struct mddev *mddev)
{
struct r10conf *conf = NULL;
@@ -3746,20 +3783,24 @@ static struct r10conf *setup_conf(struct mddev *mddev)
return conf;
out:
- if (conf) {
- mempool_exit(&conf->r10bio_pool);
- kfree(conf->mirrors);
- safe_put_page(conf->tmppage);
- bioset_exit(&conf->bio_split);
- kfree(conf);
- }
+ raid10_free_conf(conf);
return ERR_PTR(err);
}
+static void raid10_set_io_opt(struct r10conf *conf)
+{
+ int raid_disks = conf->geo.raid_disks;
+
+ if (!(conf->geo.raid_disks % conf->geo.near_copies))
+ raid_disks /= conf->geo.near_copies;
+ blk_queue_io_opt(conf->mddev->queue, (conf->mddev->chunk_sectors << 9) *
+ raid_disks);
+}
+
static int raid10_run(struct mddev *mddev)
{
struct r10conf *conf;
- int i, disk_idx, chunk_size;
+ int i, disk_idx;
struct raid10_info *disk;
struct md_rdev *rdev;
sector_t size;
@@ -3780,6 +3821,9 @@ static int raid10_run(struct mddev *mddev)
if (!conf)
goto out;
+ mddev->thread = conf->thread;
+ conf->thread = NULL;
+
if (mddev_is_clustered(conf->mddev)) {
int fc, fo;
@@ -3792,21 +3836,13 @@ static int raid10_run(struct mddev *mddev)
}
}
- mddev->thread = conf->thread;
- conf->thread = NULL;
-
- chunk_size = mddev->chunk_sectors << 9;
if (mddev->queue) {
blk_queue_max_discard_sectors(mddev->queue,
mddev->chunk_sectors);
blk_queue_max_write_same_sectors(mddev->queue, 0);
blk_queue_max_write_zeroes_sectors(mddev->queue, 0);
- blk_queue_io_min(mddev->queue, chunk_size);
- if (conf->geo.raid_disks % conf->geo.near_copies)
- blk_queue_io_opt(mddev->queue, chunk_size * conf->geo.raid_disks);
- else
- blk_queue_io_opt(mddev->queue, chunk_size *
- (conf->geo.raid_disks / conf->geo.near_copies));
+ blk_queue_io_min(mddev->queue, mddev->chunk_sectors << 9);
+ raid10_set_io_opt(conf);
}
rdev_for_each(rdev, mddev) {
@@ -3966,10 +4002,7 @@ static int raid10_run(struct mddev *mddev)
out_free_conf:
md_unregister_thread(&mddev->thread);
- mempool_exit(&conf->r10bio_pool);
- safe_put_page(conf->tmppage);
- kfree(conf->mirrors);
- kfree(conf);
+ raid10_free_conf(conf);
mddev->private = NULL;
out:
return -EIO;
@@ -3977,15 +4010,7 @@ out:
static void raid10_free(struct mddev *mddev, void *priv)
{
- struct r10conf *conf = priv;
-
- mempool_exit(&conf->r10bio_pool);
- safe_put_page(conf->tmppage);
- kfree(conf->mirrors);
- kfree(conf->mirrors_old);
- kfree(conf->mirrors_new);
- bioset_exit(&conf->bio_split);
- kfree(conf);
+ raid10_free_conf(priv);
}
static void raid10_quiesce(struct mddev *mddev, int quiesce)
@@ -4720,6 +4745,7 @@ static void end_reshape(struct r10conf *conf)
stripe /= conf->geo.near_copies;
if (conf->mddev->queue->backing_dev_info->ra_pages < 2 * stripe)
conf->mddev->queue->backing_dev_info->ra_pages = 2 * stripe;
+ raid10_set_io_opt(conf);
}
conf->fullsync = 0;
}
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index d91154d65455..b98abe927d06 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -44,6 +44,7 @@
*/
#include <linux/blkdev.h>
+#include <linux/delay.h>
#include <linux/kthread.h>
#include <linux/raid/pq.h>
#include <linux/async_tx.h>
@@ -2417,8 +2418,6 @@ static int resize_stripes(struct r5conf *conf, int newsize)
} else
err = -ENOMEM;
- mutex_unlock(&conf->cache_size_mutex);
-
conf->slab_cache = sc;
conf->active_name = 1-conf->active_name;
@@ -2441,6 +2440,8 @@ static int resize_stripes(struct r5conf *conf, int newsize)
if (!err)
conf->pool_size = newsize;
+ mutex_unlock(&conf->cache_size_mutex);
+
return err;
}
@@ -2602,7 +2603,7 @@ static void raid5_end_write_request(struct bio *bi)
struct stripe_head *sh = bi->bi_private;
struct r5conf *conf = sh->raid_conf;
int disks = sh->disks, i;
- struct md_rdev *uninitialized_var(rdev);
+ struct md_rdev *rdev;
sector_t first_bad;
int bad_sectors;
int replacement = 0;
@@ -2670,10 +2671,10 @@ static void raid5_end_write_request(struct bio *bi)
if (!test_and_clear_bit(R5_DOUBLE_LOCKED, &sh->dev[i].flags))
clear_bit(R5_LOCKED, &sh->dev[i].flags);
set_bit(STRIPE_HANDLE, &sh->state);
- raid5_release_stripe(sh);
if (sh->batch_head && sh != sh->batch_head)
raid5_release_stripe(sh->batch_head);
+ raid5_release_stripe(sh);
}
static void raid5_error(struct mddev *mddev, struct md_rdev *rdev)
@@ -3723,7 +3724,7 @@ static void handle_stripe_fill(struct stripe_head *sh,
* back cache (prexor with orig_page, and then xor with
* page) in the read path
*/
- if (s->injournal && s->failed) {
+ if (s->to_read && s->injournal && s->failed) {
if (test_bit(STRIPE_R5C_CACHING, &sh->state))
r5c_make_stripe_write_out(sh);
goto out;
@@ -6329,7 +6330,18 @@ static void raid5d(struct md_thread *thread)
spin_unlock_irq(&conf->device_lock);
md_check_recovery(mddev);
spin_lock_irq(&conf->device_lock);
+
+ /*
+ * Waiting on MD_SB_CHANGE_PENDING below may deadlock
+ * seeing md_check_recovery() is needed to clear
+ * the flag when using mdmon.
+ */
+ continue;
}
+
+ wait_event_lock_irq(mddev->sb_wait,
+ !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags),
+ conf->device_lock);
}
pr_debug("%d stripes handled\n", handled);
@@ -7141,6 +7153,12 @@ static int only_parity(int raid_disk, int algo, int raid_disks, int max_degraded
return 0;
}
+static void raid5_set_io_opt(struct r5conf *conf)
+{
+ blk_queue_io_opt(conf->mddev->queue, (conf->chunk_sectors << 9) *
+ (conf->raid_disks - conf->max_degraded));
+}
+
static int raid5_run(struct mddev *mddev)
{
struct r5conf *conf;
@@ -7430,8 +7448,7 @@ static int raid5_run(struct mddev *mddev)
chunk_size = mddev->chunk_sectors << 9;
blk_queue_io_min(mddev->queue, chunk_size);
- blk_queue_io_opt(mddev->queue, chunk_size *
- (conf->raid_disks - conf->max_degraded));
+ raid5_set_io_opt(conf);
mddev->queue->limits.raid_partial_stripes_expensive = 1;
/*
* We can only discard a whole stripe. It doesn't make sense to
@@ -7716,6 +7733,7 @@ static int raid5_add_disk(struct mddev *mddev, struct md_rdev *rdev)
*/
if (rdev->saved_raid_disk >= 0 &&
rdev->saved_raid_disk >= first &&
+ rdev->saved_raid_disk <= last &&
conf->disks[rdev->saved_raid_disk].rdev == NULL)
first = rdev->saved_raid_disk;
@@ -8024,6 +8042,7 @@ static void end_reshape(struct r5conf *conf)
/ PAGE_SIZE);
if (conf->mddev->queue->backing_dev_info->ra_pages < 2 * stripe)
conf->mddev->queue->backing_dev_info->ra_pages = 2 * stripe;
+ raid5_set_io_opt(conf);
}
}
}