5 files changed, 74 insertions, 40 deletions

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 35bda49..bfefd07 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -60,6 +60,7 @@ struct dm_crypt_io {
 };
 
 struct dm_crypt_request {
+	struct convert_context *ctx;
 	struct scatterlist sg_in;
 	struct scatterlist sg_out;
 };
@@ -335,6 +336,18 @@ static void crypt_convert_init(struct crypt_config *cc,
 	init_completion(&ctx->restart);
 }
 
+static struct dm_crypt_request *dmreq_of_req(struct crypt_config *cc,
+					     struct ablkcipher_request *req)
+{
+	return (struct dm_crypt_request *)((char *)req + cc->dmreq_start);
+}
+
+static struct ablkcipher_request *req_of_dmreq(struct crypt_config *cc,
+					       struct dm_crypt_request *dmreq)
+{
+	return (struct ablkcipher_request *)((char *)dmreq - cc->dmreq_start);
+}
+
 static int crypt_convert_block(struct crypt_config *cc,
 			       struct convert_context *ctx,
 			       struct ablkcipher_request *req)
@@ -345,10 +358,11 @@ static int crypt_convert_block(struct crypt_config *cc,
 	u8 *iv;
 	int r = 0;
 
-	dmreq = (struct dm_crypt_request *)((char *)req + cc->dmreq_start);
+	dmreq = dmreq_of_req(cc, req);
 	iv = (u8 *)ALIGN((unsigned long)(dmreq + 1),
 			 crypto_ablkcipher_alignmask(cc->tfm) + 1);
 
+	dmreq->ctx = ctx;
 	sg_init_table(&dmreq->sg_in, 1);
 	sg_set_page(&dmreq->sg_in, bv_in->bv_page, 1 << SECTOR_SHIFT,
 		    bv_in->bv_offset + ctx->offset_in);
@@ -395,8 +409,9 @@ static void crypt_alloc_req(struct crypt_config *cc,
 		cc->req = mempool_alloc(cc->req_pool, GFP_NOIO);
 	ablkcipher_request_set_tfm(cc->req, cc->tfm);
 	ablkcipher_request_set_callback(cc->req, CRYPTO_TFM_REQ_MAY_BACKLOG |
-					     CRYPTO_TFM_REQ_MAY_SLEEP,
-					     kcryptd_async_done, ctx);
+					CRYPTO_TFM_REQ_MAY_SLEEP,
+					kcryptd_async_done,
+					dmreq_of_req(cc, cc->req));
 }
 
 /*
@@ -553,19 +568,22 @@ static void crypt_inc_pending(struct dm_crypt_io *io)
 static void crypt_dec_pending(struct dm_crypt_io *io)
 {
 	struct crypt_config *cc = io->target->private;
+	struct bio *base_bio = io->base_bio;
+	struct dm_crypt_io *base_io = io->base_io;
+	int error = io->error;
 
 	if (!atomic_dec_and_test(&io->pending))
 		return;
 
-	if (likely(!io->base_io))
-		bio_endio(io->base_bio, io->error);
+	mempool_free(io, cc->io_pool);
+
+	if (likely(!base_io))
+		bio_endio(base_bio, error);
 	else {
-		if (io->error && !io->base_io->error)
-			io->base_io->error = io->error;
-		crypt_dec_pending(io->base_io);
+		if (error && !base_io->error)
+			base_io->error = error;
+		crypt_dec_pending(base_io);
 	}
-
-	mempool_free(io, cc->io_pool);
 }
 
 /*
@@ -821,7 +839,8 @@ static void kcryptd_crypt_read_convert(struct dm_crypt_io *io)
 static void kcryptd_async_done(struct crypto_async_request *async_req,
 			       int error)
 {
-	struct convert_context *ctx = async_req->data;
+	struct dm_crypt_request *dmreq = async_req->data;
+	struct convert_context *ctx = dmreq->ctx;
 	struct dm_crypt_io *io = container_of(ctx, struct dm_crypt_io, ctx);
 	struct crypt_config *cc = io->target->private;
 
@@ -830,7 +849,7 @@ static void kcryptd_async_done(struct crypto_async_request *async_req,
 		return;
 	}
 
-	mempool_free(ablkcipher_request_cast(async_req), cc->req_pool);
+	mempool_free(req_of_dmreq(cc, dmreq), cc->req_pool);
 
 	if (!atomic_dec_and_test(&ctx->pending))
 		return;
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index f14813b..36e2b5e 100644
--- a/drivers/md/dm-io.c
+++ b/drivers/md/dm-io.c
@@ -292,6 +292,8 @@ static void do_region(int rw, unsigned region, struct dm_io_region *where,
 					     (PAGE_SIZE >> SECTOR_SHIFT));
 		num_bvecs = 1 + min_t(int, bio_get_nr_vecs(where->bdev),
 				      num_bvecs);
+		if (unlikely(num_bvecs > BIO_MAX_PAGES))
+			num_bvecs = BIO_MAX_PAGES;
 		bio = bio_alloc_bioset(GFP_NOIO, num_bvecs, io->client->bios);
 		bio->bi_sector = where->sector + (where->count - remaining);
 		bio->bi_bdev = where->bdev;
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index 54d0588..f010965 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -704,7 +704,8 @@ static int dev_rename(struct dm_ioctl *param, size_t param_size)
 	char *new_name = (char *) param + param->data_start;
 
 	if (new_name < param->data ||
-	    invalid_str(new_name, (void *) param + param_size)) {
+	    invalid_str(new_name, (void *) param + param_size) ||
+	    strlen(new_name) > DM_NAME_LEN - 1) {
 		DMWARN("Invalid new logical volume name supplied.");
 		return -EINVAL;
 	}
@@ -1063,7 +1064,7 @@ static int table_load(struct dm_ioctl *param, size_t param_size)
 
 	r = populate_table(t, param, param_size);
 	if (r) {
-		dm_table_put(t);
+		dm_table_destroy(t);
 		goto out;
 	}
 
@@ -1071,7 +1072,7 @@ static int table_load(struct dm_ioctl *param, size_t param_size)
 	hc = dm_get_mdptr(md);
 	if (!hc || hc->md != md) {
 		DMWARN("device has been removed from the dev hash table.");
-		dm_table_put(t);
+		dm_table_destroy(t);
 		up_write(&_hash_lock);
 		r = -ENXIO;
 		goto out;
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 51ba1db..8d40f27 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -525,9 +525,12 @@ static int __noflush_suspending(struct mapped_device *md)
 static void dec_pending(struct dm_io *io, int error)
 {
 	unsigned long flags;
+	int io_error;
+	struct bio *bio;
+	struct mapped_device *md = io->md;
 
 	/* Push-back supersedes any I/O errors */
-	if (error && !(io->error > 0 && __noflush_suspending(io->md)))
+	if (error && !(io->error > 0 && __noflush_suspending(md)))
 		io->error = error;
 
 	if (atomic_dec_and_test(&io->io_count)) {
@@ -537,24 +540,27 @@ static void dec_pending(struct dm_io *io, int error)
 			 * This must be handled before the sleeper on
 			 * suspend queue merges the pushback list.
 			 */
-			spin_lock_irqsave(&io->md->pushback_lock, flags);
-			if (__noflush_suspending(io->md))
-				bio_list_add(&io->md->pushback, io->bio);
+			spin_lock_irqsave(&md->pushback_lock, flags);
+			if (__noflush_suspending(md))
+				bio_list_add(&md->pushback, io->bio);
 			else
 				/* noflush suspend was interrupted. */
 				io->error = -EIO;
-			spin_unlock_irqrestore(&io->md->pushback_lock, flags);
+			spin_unlock_irqrestore(&md->pushback_lock, flags);
 		}
 
 		end_io_acct(io);
 
-		if (io->error != DM_ENDIO_REQUEUE) {
-			trace_block_bio_complete(io->md->queue, io->bio);
+		io_error = io->error;
+		bio = io->bio;
 
-			bio_endio(io->bio, io->error);
-		}
+		free_io(md, io);
+
+		if (io_error != DM_ENDIO_REQUEUE) {
+			trace_block_bio_complete(md->queue, bio);
 
-		free_io(io->md, io);
+			bio_endio(bio, io_error);
+		}
 	}
 }
 
@@ -562,6 +568,7 @@ static void clone_endio(struct bio *bio, int error)
 {
 	int r = 0;
 	struct dm_target_io *tio = bio->bi_private;
+	struct dm_io *io = tio->io;
 	struct mapped_device *md = tio->io->md;
 	dm_endio_fn endio = tio->ti->type->end_io;
 
@@ -585,15 +592,14 @@ static void clone_endio(struct bio *bio, int error)
 		}
 	}
 
-	dec_pending(tio->io, error);
-
 	/*
 	 * Store md for cleanup instead of tio which is about to get freed.
 	 */
 	bio->bi_private = md->bs;
 
-	bio_put(bio);
 	free_tio(md, tio);
+	bio_put(bio);
+	dec_pending(io, error);
 }
 
 static sector_t max_io_len(struct mapped_device *md,
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 03b4cd0..a307f87 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -214,12 +214,7 @@ static inline mddev_t *mddev_get(mddev_t *mddev)
 	return mddev;
 }
 
-static void mddev_delayed_delete(struct work_struct *ws)
-{
-	mddev_t *mddev = container_of(ws, mddev_t, del_work);
-	kobject_del(&mddev->kobj);
-	kobject_put(&mddev->kobj);
-}
+static void mddev_delayed_delete(struct work_struct *ws);
 
 static void mddev_put(mddev_t *mddev)
 {
@@ -3542,6 +3537,21 @@ static struct kobj_type md_ktype = {
 
 int mdp_major = 0;
 
+static void mddev_delayed_delete(struct work_struct *ws)
+{
+	mddev_t *mddev = container_of(ws, mddev_t, del_work);
+
+	if (mddev->private == &md_redundancy_group) {
+		sysfs_remove_group(&mddev->kobj, &md_redundancy_group);
+		if (mddev->sysfs_action)
+			sysfs_put(mddev->sysfs_action);
+		mddev->sysfs_action = NULL;
+		mddev->private = NULL;
+	}
+	kobject_del(&mddev->kobj);
+	kobject_put(&mddev->kobj);
+}
+
 static int md_alloc(dev_t dev, char *name)
 {
 	static DEFINE_MUTEX(disks_mutex);
@@ -4033,13 +4043,9 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open)
 			mddev->queue->merge_bvec_fn = NULL;
 			mddev->queue->unplug_fn = NULL;
 			mddev->queue->backing_dev_info.congested_fn = NULL;
-			if (mddev->pers->sync_request) {
-				sysfs_remove_group(&mddev->kobj, &md_redundancy_group);
-				if (mddev->sysfs_action)
-					sysfs_put(mddev->sysfs_action);
-				mddev->sysfs_action = NULL;
-			}
 			module_put(mddev->pers->owner);
+			if (mddev->pers->sync_request)
+				mddev->private = &md_redundancy_group;
 			mddev->pers = NULL;
 			/* tell userspace to handle 'inactive' */
 			sysfs_notify_dirent(mddev->sysfs_state);