Merge tag 'block-6.10-20240523' of git://git.kernel.dk/linux

Pull more block updates from Jens Axboe:
 "Followup block updates, mostly due to NVMe being a bit late to the
  party. But nothing major in there, so not a big deal.

  In detail, this contains:

   - NVMe pull request via Keith:
       - Fabrics connection retries (Daniel, Hannes)
       - Fabrics logging enhancements (Tokunori)
       - RDMA delete optimization (Sagi)

   - ublk DMA alignment fix (me)

   - null_blk sparse warning fixes (Bart)

   - Discard support for brd (Keith)

   - blk-cgroup list corruption fixes (Ming)

   - blk-cgroup stat propagation fix (Waiman)

   - Regression fix for plugging stall with md (Yu)

   - Misc fixes or cleanups (David, Jeff, Justin)"

* tag 'block-6.10-20240523' of git://git.kernel.dk/linux: (24 commits)
  null_blk: fix null-ptr-dereference while configuring 'power' and 'submit_queues'
  blk-throttle: remove unused struct 'avg_latency_bucket'
  block: fix lost bio for plug enabled bio based device
  block: t10-pi: add MODULE_DESCRIPTION()
  blk-mq: add helper for checking if one CPU is mapped to specified hctx
  blk-cgroup: Properly propagate the iostat update up the hierarchy
  blk-cgroup: fix list corruption from reorder of WRITE ->lqueued
  blk-cgroup: fix list corruption from resetting io stat
  cdrom: rearrange last_media_change check to avoid unintentional overflow
  nbd: Fix signal handling
  nbd: Remove a local variable from nbd_send_cmd()
  nbd: Improve the documentation of the locking assumptions
  nbd: Remove superfluous casts
  nbd: Use NULL to represent a pointer
  brd: implement discard support
  null_blk: Fix two sparse warnings
  ublk_drv: set DMA alignment mask to 3
  nvme-rdma, nvme-tcp: include max reconnects for reconnect logging
  nvmet-rdma: Avoid o(n^2) loop in delete_ctrl
  nvme: do not retry authentication failures
  ...

block/blk-cgroup.c

@@ -322,6 +322,7 @@ static struct blkcg_gq *blkg_alloc(struct blkcg *blkcg, struct gendisk *disk,
 	blkg->q = disk->queue;
 	INIT_LIST_HEAD(&blkg->q_node);
 	blkg->blkcg = blkcg;
+	blkg->iostat.blkg = blkg;
 #ifdef CONFIG_BLK_CGROUP_PUNT_BIO
 	spin_lock_init(&blkg->async_bio_lock);
 	bio_list_init(&blkg->async_bios);
@@ -618,12 +619,45 @@ static void blkg_destroy_all(struct gendisk *disk)
 	spin_unlock_irq(&q->queue_lock);
 }
 
+static void blkg_iostat_set(struct blkg_iostat *dst, struct blkg_iostat *src)
+{
+	int i;
+
+	for (i = 0; i < BLKG_IOSTAT_NR; i++) {
+		dst->bytes[i] = src->bytes[i];
+		dst->ios[i] = src->ios[i];
+	}
+}
+
+static void __blkg_clear_stat(struct blkg_iostat_set *bis)
+{
+	struct blkg_iostat cur = {0};
+	unsigned long flags;
+
+	flags = u64_stats_update_begin_irqsave(&bis->sync);
+	blkg_iostat_set(&bis->cur, &cur);
+	blkg_iostat_set(&bis->last, &cur);
+	u64_stats_update_end_irqrestore(&bis->sync, flags);
+}
+
+static void blkg_clear_stat(struct blkcg_gq *blkg)
+{
+	int cpu;
+
+	for_each_possible_cpu(cpu) {
+		struct blkg_iostat_set *s = per_cpu_ptr(blkg->iostat_cpu, cpu);
+
+		__blkg_clear_stat(s);
+	}
+	__blkg_clear_stat(&blkg->iostat);
+}
+
 static int blkcg_reset_stats(struct cgroup_subsys_state *css,
 			     struct cftype *cftype, u64 val)
 {
 	struct blkcg *blkcg = css_to_blkcg(css);
 	struct blkcg_gq *blkg;
-	int i, cpu;
+	int i;
 
 	mutex_lock(&blkcg_pol_mutex);
 	spin_lock_irq(&blkcg->lock);
@@ -634,18 +668,7 @@ static int blkcg_reset_stats(struct cgroup_subsys_state *css,
 	 * anyway.  If you get hit by a race, retry.
 	 */
 	hlist_for_each_entry(blkg, &blkcg->blkg_list, blkcg_node) {
-		for_each_possible_cpu(cpu) {
-			struct blkg_iostat_set *bis =
-				per_cpu_ptr(blkg->iostat_cpu, cpu);
-			memset(bis, 0, sizeof(*bis));
-
-			/* Re-initialize the cleared blkg_iostat_set */
-			u64_stats_init(&bis->sync);
-			bis->blkg = blkg;
-		}
-		memset(&blkg->iostat, 0, sizeof(blkg->iostat));
-		u64_stats_init(&blkg->iostat.sync);
-
+		blkg_clear_stat(blkg);
 		for (i = 0; i < BLKCG_MAX_POLS; i++) {
 			struct blkcg_policy *pol = blkcg_policy[i];
 
@@ -948,16 +971,6 @@ void blkg_conf_exit(struct blkg_conf_ctx *ctx)
 }
 EXPORT_SYMBOL_GPL(blkg_conf_exit);
 
-static void blkg_iostat_set(struct blkg_iostat *dst, struct blkg_iostat *src)
-{
-	int i;
-
-	for (i = 0; i < BLKG_IOSTAT_NR; i++) {
-		dst->bytes[i] = src->bytes[i];
-		dst->ios[i] = src->ios[i];
-	}
-}
-
 static void blkg_iostat_add(struct blkg_iostat *dst, struct blkg_iostat *src)
 {
 	int i;
@@ -1023,7 +1036,19 @@ static void __blkcg_rstat_flush(struct blkcg *blkcg, int cpu)
 		struct blkg_iostat cur;
 		unsigned int seq;
 
+		/*
+		 * Order assignment of `next_bisc` from `bisc->lnode.next` in
+		 * llist_for_each_entry_safe and clearing `bisc->lqueued` for
+		 * avoiding to assign `next_bisc` with new next pointer added
+		 * in blk_cgroup_bio_start() in case of re-ordering.
+		 *
+		 * The pair barrier is implied in llist_add() in blk_cgroup_bio_start().
+		 */
+		smp_mb();
+
 		WRITE_ONCE(bisc->lqueued, false);
+		if (bisc == &blkg->iostat)
+			goto propagate_up; /* propagate up to parent only */
 
 		/* fetch the current per-cpu values */
 		do {
@@ -1033,10 +1058,24 @@ static void __blkcg_rstat_flush(struct blkcg *blkcg, int cpu)
 
 		blkcg_iostat_update(blkg, &cur, &bisc->last);
 
+propagate_up:
 		/* propagate global delta to parent (unless that's root) */
-		if (parent && parent->parent)
+		if (parent && parent->parent) {
 			blkcg_iostat_update(parent, &blkg->iostat.cur,
 					    &blkg->iostat.last);
+			/*
+			 * Queue parent->iostat to its blkcg's lockless
+			 * list to propagate up to the grandparent if the
+			 * iostat hasn't been queued yet.
+			 */
+			if (!parent->iostat.lqueued) {
+				struct llist_head *plhead;
+
+				plhead = per_cpu_ptr(parent->blkcg->lhead, cpu);
+				llist_add(&parent->iostat.lnode, plhead);
+				parent->iostat.lqueued = true;
+			}
+		}
 	}
 	raw_spin_unlock_irqrestore(&blkg_stat_lock, flags);
 out:

block/blk-core.c

@@ -615,9 +615,14 @@ static inline blk_status_t blk_check_zone_append(struct request_queue *q,
 
 static void __submit_bio(struct bio *bio)
 {
+	/* If plug is not used, add new plug here to cache nsecs time. */
+	struct blk_plug plug;
+
 	if (unlikely(!blk_crypto_bio_prep(&bio)))
 		return;
 
+	blk_start_plug(&plug);
+
 	if (!bdev_test_flag(bio->bi_bdev, BD_HAS_SUBMIT_BIO)) {
 		blk_mq_submit_bio(bio);
 	} else if (likely(bio_queue_enter(bio) == 0)) {
@@ -626,6 +631,8 @@ static void __submit_bio(struct bio *bio)
 		disk->fops->submit_bio(bio);
 		blk_queue_exit(disk->queue);
 	}
+
+	blk_finish_plug(&plug);
 }
 
 /*
@@ -650,13 +657,11 @@ static void __submit_bio(struct bio *bio)
 static void __submit_bio_noacct(struct bio *bio)
 {
 	struct bio_list bio_list_on_stack[2];
-	struct blk_plug plug;
 
 	BUG_ON(bio->bi_next);
 
 	bio_list_init(&bio_list_on_stack[0]);
 	current->bio_list = bio_list_on_stack;
-	blk_start_plug(&plug);
 
 	do {
 		struct request_queue *q = bdev_get_queue(bio->bi_bdev);
@@ -690,23 +695,19 @@ static void __submit_bio_noacct(struct bio *bio)
 		bio_list_merge(&bio_list_on_stack[0], &bio_list_on_stack[1]);
 	} while ((bio = bio_list_pop(&bio_list_on_stack[0])));
 
-	blk_finish_plug(&plug);
 	current->bio_list = NULL;
 }
 
 static void __submit_bio_noacct_mq(struct bio *bio)
 {
 	struct bio_list bio_list[2] = { };
-	struct blk_plug plug;
 
 	current->bio_list = bio_list;
-	blk_start_plug(&plug);
 
 	do {
 		__submit_bio(bio);
 	} while ((bio = bio_list_pop(&bio_list[0])));
 
-	blk_finish_plug(&plug);
 	current->bio_list = NULL;
 }
 

block/blk-mq.c

@@ -3545,12 +3545,28 @@ static int blk_mq_hctx_notify_offline(unsigned int cpu, struct hlist_node *node)
 	return 0;
 }
 
+/*
+ * Check if one CPU is mapped to the specified hctx
+ *
+ * Isolated CPUs have been ruled out from hctx->cpumask, which is supposed
+ * to be used for scheduling kworker only. For other usage, please call this
+ * helper for checking if one CPU belongs to the specified hctx
+ */
+static bool blk_mq_cpu_mapped_to_hctx(unsigned int cpu,
+		const struct blk_mq_hw_ctx *hctx)
+{
+	struct blk_mq_hw_ctx *mapped_hctx = blk_mq_map_queue_type(hctx->queue,
+			hctx->type, cpu);
+
+	return mapped_hctx == hctx;
+}
+
 static int blk_mq_hctx_notify_online(unsigned int cpu, struct hlist_node *node)
 {
 	struct blk_mq_hw_ctx *hctx = hlist_entry_safe(node,
 			struct blk_mq_hw_ctx, cpuhp_online);
 
-	if (cpumask_test_cpu(cpu, hctx->cpumask))
+	if (blk_mq_cpu_mapped_to_hctx(cpu, hctx))
 		clear_bit(BLK_MQ_S_INACTIVE, &hctx->state);
 	return 0;
 }
@@ -3568,7 +3584,7 @@ static int blk_mq_hctx_notify_dead(unsigned int cpu, struct hlist_node *node)
 	enum hctx_type type;
 
 	hctx = hlist_entry_safe(node, struct blk_mq_hw_ctx, cpuhp_dead);
-	if (!cpumask_test_cpu(cpu, hctx->cpumask))
+	if (!blk_mq_cpu_mapped_to_hctx(cpu, hctx))
 		return 0;
 
 	ctx = __blk_mq_get_ctx(hctx->queue, cpu);

block/blk-throttle.c

@@ -39,11 +39,6 @@ struct latency_bucket {
 	int samples;
 };
 
-struct avg_latency_bucket {
-	unsigned long latency; /* ns / 1024 */
-	bool valid;
-};
-
 struct throtl_data
 {
 	/* service tree for active throtl groups */

block/t10-pi.c

@@ -495,5 +495,5 @@ const struct blk_integrity_profile ext_pi_type3_crc64 = {
 };
 EXPORT_SYMBOL_GPL(ext_pi_type3_crc64);
 
-MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("T10 Protection Information module");
 MODULE_LICENSE("GPL");

drivers/block/brd.c

@@ -222,6 +222,23 @@ static int brd_do_bvec(struct brd_device *brd, struct page *page,
 	return err;
 }
 
+static void brd_do_discard(struct brd_device *brd, sector_t sector, u32 size)
+{
+	sector_t aligned_sector = (sector + PAGE_SECTORS) & ~PAGE_SECTORS;
+	struct page *page;
+
+	size -= (aligned_sector - sector) * SECTOR_SIZE;
+	xa_lock(&brd->brd_pages);
+	while (size >= PAGE_SIZE && aligned_sector < rd_size * 2) {
+		page = __xa_erase(&brd->brd_pages, aligned_sector >> PAGE_SECTORS_SHIFT);
+		if (page)
+			__free_page(page);
+		aligned_sector += PAGE_SECTORS;
+		size -= PAGE_SIZE;
+	}
+	xa_unlock(&brd->brd_pages);
+}
+
 static void brd_submit_bio(struct bio *bio)
 {
 	struct brd_device *brd = bio->bi_bdev->bd_disk->private_data;
@@ -229,6 +246,12 @@ static void brd_submit_bio(struct bio *bio)
 	struct bio_vec bvec;
 	struct bvec_iter iter;
 
+	if (unlikely(op_is_discard(bio->bi_opf))) {
+		brd_do_discard(brd, sector, bio->bi_iter.bi_size);
+		bio_endio(bio);
+		return;
+	}
+
 	bio_for_each_segment(bvec, bio, iter) {
 		unsigned int len = bvec.bv_len;
 		int err;
@@ -309,6 +332,9 @@ static int brd_alloc(int i)
 		 *  is harmless)
 		 */
 		.physical_block_size	= PAGE_SIZE,
+		.max_hw_discard_sectors	= UINT_MAX,
+		.max_discard_segments	= 1,
+		.discard_granularity	= PAGE_SIZE,
 	};
 
 	list_for_each_entry(brd, &brd_devices, brd_list)

drivers/block/nbd.c

@@ -222,7 +222,7 @@ static ssize_t pid_show(struct device *dev,
 			struct device_attribute *attr, char *buf)
 {
 	struct gendisk *disk = dev_to_disk(dev);
-	struct nbd_device *nbd = (struct nbd_device *)disk->private_data;
+	struct nbd_device *nbd = disk->private_data;
 
 	return sprintf(buf, "%d\n", nbd->pid);
 }
@@ -236,7 +236,7 @@ static ssize_t backend_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct gendisk *disk = dev_to_disk(dev);
-	struct nbd_device *nbd = (struct nbd_device *)disk->private_data;
+	struct nbd_device *nbd = disk->private_data;
 
 	return sprintf(buf, "%s\n", nbd->backend ?: "");
 }
@@ -588,7 +588,10 @@ static inline int was_interrupted(int result)
 	return result == -ERESTARTSYS || result == -EINTR;
 }
 
-/* always call with the tx_lock held */
+/*
+ * Returns BLK_STS_RESOURCE if the caller should retry after a delay. Returns
+ * -EAGAIN if the caller should requeue @cmd. Returns -EIO if sending failed.
+ */
 static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index)
 {
 	struct request *req = blk_mq_rq_from_pdu(cmd);
@@ -598,13 +601,15 @@ static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index)
 	struct nbd_request request = {.magic = htonl(NBD_REQUEST_MAGIC)};
 	struct kvec iov = {.iov_base = &request, .iov_len = sizeof(request)};
 	struct iov_iter from;
-	unsigned long size = blk_rq_bytes(req);
 	struct bio *bio;
 	u64 handle;
 	u32 type;
 	u32 nbd_cmd_flags = 0;
 	int sent = nsock->sent, skip = 0;
 
+	lockdep_assert_held(&cmd->lock);
+	lockdep_assert_held(&nsock->tx_lock);
+
 	iov_iter_kvec(&from, ITER_SOURCE, &iov, 1, sizeof(request));
 
 	type = req_to_nbd_cmd_type(req);
@@ -644,7 +649,7 @@ static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index)
 	request.type = htonl(type | nbd_cmd_flags);
 	if (type != NBD_CMD_FLUSH) {
 		request.from = cpu_to_be64((u64)blk_rq_pos(req) << 9);
-		request.len = htonl(size);
+		request.len = htonl(blk_rq_bytes(req));
 	}
 	handle = nbd_cmd_handle(cmd);
 	request.cookie = cpu_to_be64(handle);
@@ -669,7 +674,7 @@ static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index)
 				nsock->sent = sent;
 			}
 			set_bit(NBD_CMD_REQUEUED, &cmd->flags);
-			return BLK_STS_RESOURCE;
+			return (__force int)BLK_STS_RESOURCE;
 		}
 		dev_err_ratelimited(disk_to_dev(nbd->disk),
 			"Send control failed (result %d)\n", result);
@@ -710,7 +715,7 @@ static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index)
 					nsock->pending = req;
 					nsock->sent = sent;
 					set_bit(NBD_CMD_REQUEUED, &cmd->flags);
-					return BLK_STS_RESOURCE;
+					return (__force int)BLK_STS_RESOURCE;
 				}
 				dev_err(disk_to_dev(nbd->disk),
 					"Send data failed (result %d)\n",
@@ -1007,7 +1012,7 @@ static int wait_for_reconnect(struct nbd_device *nbd)
 	return !test_bit(NBD_RT_DISCONNECTED, &config->runtime_flags);
 }
 
-static int nbd_handle_cmd(struct nbd_cmd *cmd, int index)
+static blk_status_t nbd_handle_cmd(struct nbd_cmd *cmd, int index)
 {
 	struct request *req = blk_mq_rq_from_pdu(cmd);
 	struct nbd_device *nbd = cmd->nbd;
@@ -1015,18 +1020,20 @@ static int nbd_handle_cmd(struct nbd_cmd *cmd, int index)
 	struct nbd_sock *nsock;
 	int ret;
 
+	lockdep_assert_held(&cmd->lock);
+
 	config = nbd_get_config_unlocked(nbd);
 	if (!config) {
 		dev_err_ratelimited(disk_to_dev(nbd->disk),
 				    "Socks array is empty\n");
-		return -EINVAL;
+		return BLK_STS_IOERR;
 	}
 
 	if (index >= config->num_connections) {
 		dev_err_ratelimited(disk_to_dev(nbd->disk),
 				    "Attempted send on invalid socket\n");
 		nbd_config_put(nbd);
-		return -EINVAL;
+		return BLK_STS_IOERR;
 	}
 	cmd->status = BLK_STS_OK;
 again:
@@ -1049,7 +1056,7 @@ static int nbd_handle_cmd(struct nbd_cmd *cmd, int index)
 			 */
 			sock_shutdown(nbd);
 			nbd_config_put(nbd);
-			return -EIO;
+			return BLK_STS_IOERR;
 		}
 		goto again;
 	}
@@ -1062,7 +1069,7 @@ static int nbd_handle_cmd(struct nbd_cmd *cmd, int index)
 	blk_mq_start_request(req);
 	if (unlikely(nsock->pending && nsock->pending != req)) {
 		nbd_requeue_cmd(cmd);
-		ret = 0;
+		ret = BLK_STS_OK;
 		goto out;
 	}
 	/*
@@ -1081,19 +1088,19 @@ static int nbd_handle_cmd(struct nbd_cmd *cmd, int index)
 				    "Request send failed, requeueing\n");
 		nbd_mark_nsock_dead(nbd, nsock, 1);
 		nbd_requeue_cmd(cmd);
-		ret = 0;
+		ret = BLK_STS_OK;
 	}
 out:
 	mutex_unlock(&nsock->tx_lock);
 	nbd_config_put(nbd);
-	return ret;
+	return ret < 0 ? BLK_STS_IOERR : (__force blk_status_t)ret;
 }
 
 static blk_status_t nbd_queue_rq(struct blk_mq_hw_ctx *hctx,
 			const struct blk_mq_queue_data *bd)
 {
 	struct nbd_cmd *cmd = blk_mq_rq_to_pdu(bd->rq);
-	int ret;
+	blk_status_t ret;
 
 	/*
 	 * Since we look at the bio's to send the request over the network we
@@ -1113,10 +1120,6 @@ static blk_status_t nbd_queue_rq(struct blk_mq_hw_ctx *hctx,
 	 * appropriate.
 	 */
 	ret = nbd_handle_cmd(cmd, hctx->queue_num);
-	if (ret < 0)
-		ret = BLK_STS_IOERR;
-	else if (!ret)
-		ret = BLK_STS_OK;
 	mutex_unlock(&cmd->lock);
 
 	return ret;

drivers/block/null_blk/main.c

@@ -413,13 +413,25 @@ static int nullb_update_nr_hw_queues(struct nullb_device *dev,
 static int nullb_apply_submit_queues(struct nullb_device *dev,
 				     unsigned int submit_queues)
 {
-	return nullb_update_nr_hw_queues(dev, submit_queues, dev->poll_queues);
+	int ret;
+
+	mutex_lock(&lock);
+	ret = nullb_update_nr_hw_queues(dev, submit_queues, dev->poll_queues);
+	mutex_unlock(&lock);
+
+	return ret;
 }
 
 static int nullb_apply_poll_queues(struct nullb_device *dev,
 				   unsigned int poll_queues)
 {
-	return nullb_update_nr_hw_queues(dev, dev->submit_queues, poll_queues);
+	int ret;
+
+	mutex_lock(&lock);
+	ret = nullb_update_nr_hw_queues(dev, dev->submit_queues, poll_queues);
+	mutex_unlock(&lock);
+
+	return ret;
 }
 
 NULLB_DEVICE_ATTR(size, ulong, NULL);
@@ -468,28 +480,31 @@ static ssize_t nullb_device_power_store(struct config_item *item,
 	if (ret < 0)
 		return ret;
 
+	ret = count;
+	mutex_lock(&lock);
 	if (!dev->power && newp) {
 		if (test_and_set_bit(NULLB_DEV_FL_UP, &dev->flags))
-			return count;
+			goto out;
+
 		ret = null_add_dev(dev);
 		if (ret) {
 			clear_bit(NULLB_DEV_FL_UP, &dev->flags);
-			return ret;
+			goto out;
 		}
 
 		set_bit(NULLB_DEV_FL_CONFIGURED, &dev->flags);
 		dev->power = newp;
 	} else if (dev->power && !newp) {
 		if (test_and_clear_bit(NULLB_DEV_FL_UP, &dev->flags)) {
-			mutex_lock(&lock);
 			dev->power = newp;
 			null_del_dev(dev->nullb);
-			mutex_unlock(&lock);
 		}
 		clear_bit(NULLB_DEV_FL_CONFIGURED, &dev->flags);
 	}
 
-	return count;
+out:
+	mutex_unlock(&lock);
+	return ret;
 }
 
 CONFIGFS_ATTR(nullb_device_, power);
@@ -1218,7 +1233,7 @@ static int null_transfer(struct nullb *nullb, struct page *page,
 	return err;
 }
 
-static int null_handle_rq(struct nullb_cmd *cmd)
+static blk_status_t null_handle_rq(struct nullb_cmd *cmd)
 {
 	struct request *rq = blk_mq_rq_from_pdu(cmd);
 	struct nullb *nullb = cmd->nq->dev->nullb;
@@ -1932,15 +1947,12 @@ static int null_add_dev(struct nullb_device *dev)
 	nullb->q->queuedata = nullb;
 	blk_queue_flag_set(QUEUE_FLAG_NONROT, nullb->q);
 
-	mutex_lock(&lock);
 	rv = ida_alloc(&nullb_indexes, GFP_KERNEL);
-	if (rv < 0) {
-		mutex_unlock(&lock);
+	if (rv < 0)
 		goto out_cleanup_disk;
-	}
+
 	nullb->index = rv;
 	dev->index = rv;
-	mutex_unlock(&lock);
 
 	if (config_item_name(&dev->group.cg_item)) {
 		/* Use configfs dir name as the device name */
@@ -1969,9 +1981,7 @@ static int null_add_dev(struct nullb_device *dev)
 	if (rv)
 		goto out_ida_free;
 
-	mutex_lock(&lock);
 	list_add_tail(&nullb->list, &nullb_list);
-	mutex_unlock(&lock);
 
 	pr_info("disk %s created\n", nullb->disk_name);
 
@@ -2020,7 +2030,9 @@ static int null_create_dev(void)
 	if (!dev)
 		return -ENOMEM;
 
+	mutex_lock(&lock);
 	ret = null_add_dev(dev);
+	mutex_unlock(&lock);
 	if (ret) {
 		null_free_dev(dev);
 		return ret;

drivers/block/null_blk/trace.h

@@ -36,7 +36,12 @@ TRACE_EVENT(nullb_zone_op,
 	    TP_ARGS(cmd, zone_no, zone_cond),
 	    TP_STRUCT__entry(
 		__array(char, disk, DISK_NAME_LEN)
-		__field(enum req_op, op)
+		/*
+		 * __field() uses is_signed_type(). is_signed_type() does not
+		 * support bitwise types. Use __field_struct() instead because
+		 * it does not use is_signed_type().
+		 */
+		__field_struct(enum req_op, op)
 		__field(unsigned int, zone_no)
 		__field(unsigned int, zone_cond)
 	    ),

drivers/block/ublk_drv.c

@@ -2178,6 +2178,7 @@ static int ublk_ctrl_start_dev(struct ublk_device *ub, struct io_uring_cmd *cmd)
 		.virt_boundary_mask	= p->virt_boundary_mask,
 		.max_segments		= USHRT_MAX,
 		.max_segment_size	= UINT_MAX,
+		.dma_alignment		= 3,
 	};
 	struct gendisk *disk;
 	int ret = -EINVAL;

drivers/cdrom/cdrom.c

@@ -2358,7 +2358,7 @@ static int cdrom_ioctl_timed_media_change(struct cdrom_device_info *cdi,
 		return -EFAULT;
 
 	tmp_info.media_flags = 0;
-	if (tmp_info.last_media_change - cdi->last_media_change_ms < 0)
+	if (cdi->last_media_change_ms > tmp_info.last_media_change)
 		tmp_info.media_flags |= MEDIA_CHANGED_FLAG;
 
 	tmp_info.last_media_change = cdi->last_media_change_ms;

drivers/nvme/host/auth.c

@@ -730,7 +730,7 @@ static void nvme_queue_auth_work(struct work_struct *work)
 					 NVME_AUTH_DHCHAP_MESSAGE_CHALLENGE);
 	if (ret) {
 		chap->status = ret;
-		chap->error = -ECONNREFUSED;
+		chap->error = -EKEYREJECTED;
 		return;
 	}
 
@@ -797,7 +797,7 @@ static void nvme_queue_auth_work(struct work_struct *work)
 					 NVME_AUTH_DHCHAP_MESSAGE_SUCCESS1);
 	if (ret) {
 		chap->status = ret;
-		chap->error = -ECONNREFUSED;
+		chap->error = -EKEYREJECTED;
 		return;
 	}
 
@@ -818,7 +818,7 @@ static void nvme_queue_auth_work(struct work_struct *work)
 	ret = nvme_auth_process_dhchap_success1(ctrl, chap);
 	if (ret) {
 		/* Controller authentication failed */
-		chap->error = -ECONNREFUSED;
+		chap->error = -EKEYREJECTED;
 		goto fail2;
 	}
 

drivers/nvme/host/core.c

@@ -383,14 +383,14 @@ static inline enum nvme_disposition nvme_decide_disposition(struct request *req)
 	if (likely(nvme_req(req)->status == 0))
 		return COMPLETE;
 
-	if ((nvme_req(req)->status & 0x7ff) == NVME_SC_AUTH_REQUIRED)
-		return AUTHENTICATE;
-
 	if (blk_noretry_request(req) ||
 	    (nvme_req(req)->status & NVME_SC_DNR) ||
 	    nvme_req(req)->retries >= nvme_max_retries)
 		return COMPLETE;
 
+	if ((nvme_req(req)->status & 0x7ff) == NVME_SC_AUTH_REQUIRED)
+		return AUTHENTICATE;
+
 	if (req->cmd_flags & REQ_NVME_MPATH) {
 		if (nvme_is_path_error(nvme_req(req)->status) ||
 		    blk_queue_dying(req->q))

drivers/nvme/host/fabrics.c

@@ -428,12 +428,6 @@ static void nvmf_connect_cmd_prep(struct nvme_ctrl *ctrl, u16 qid,
  * fabrics-protocol connection of the NVMe Admin queue between the
  * host system device and the allocated NVMe controller on the
  * target system via a NVMe Fabrics "Connect" command.
- *
- * Return:
- *	0: success
- *	> 0: NVMe error status code
- *	< 0: Linux errno error code
- *
  */
 int nvmf_connect_admin_queue(struct nvme_ctrl *ctrl)
 {
@@ -467,7 +461,7 @@ int nvmf_connect_admin_queue(struct nvme_ctrl *ctrl)
 		if (result & NVME_CONNECT_AUTHREQ_ASCR) {
 			dev_warn(ctrl->device,
 				 "qid 0: secure concatenation is not supported\n");
-			ret = NVME_SC_AUTH_REQUIRED;
+			ret = -EOPNOTSUPP;
 			goto out_free_data;
 		}
 		/* Authentication required */
@@ -475,14 +469,14 @@ int nvmf_connect_admin_queue(struct nvme_ctrl *ctrl)
 		if (ret) {
 			dev_warn(ctrl->device,
 				 "qid 0: authentication setup failed\n");
-			ret = NVME_SC_AUTH_REQUIRED;
 			goto out_free_data;
 		}
 		ret = nvme_auth_wait(ctrl, 0);
-		if (ret)
+		if (ret) {
 			dev_warn(ctrl->device,
-				 "qid 0: authentication failed\n");
-		else
+				 "qid 0: authentication failed, error %d\n",
+				 ret);
+		} else
 			dev_info(ctrl->device,
 				 "qid 0: authenticated\n");
 	}
@@ -542,7 +536,7 @@ int nvmf_connect_io_queue(struct nvme_ctrl *ctrl, u16 qid)
 		if (result & NVME_CONNECT_AUTHREQ_ASCR) {
 			dev_warn(ctrl->device,
 				 "qid 0: secure concatenation is not supported\n");
-			ret = NVME_SC_AUTH_REQUIRED;
+			ret = -EOPNOTSUPP;
 			goto out_free_data;
 		}
 		/* Authentication required */
@@ -550,12 +544,13 @@ int nvmf_connect_io_queue(struct nvme_ctrl *ctrl, u16 qid)
 		if (ret) {
 			dev_warn(ctrl->device,
 				 "qid %d: authentication setup failed\n", qid);
-			ret = NVME_SC_AUTH_REQUIRED;
-		} else {
-			ret = nvme_auth_wait(ctrl, qid);
-			if (ret)
-				dev_warn(ctrl->device,
-					 "qid %u: authentication failed\n", qid);
+			goto out_free_data;
+		}
+		ret = nvme_auth_wait(ctrl, qid);
+		if (ret) {
+			dev_warn(ctrl->device,
+				 "qid %u: authentication failed, error %d\n",
+				 qid, ret);
 		}
 	}
 out_free_data:
@@ -564,8 +559,26 @@ int nvmf_connect_io_queue(struct nvme_ctrl *ctrl, u16 qid)
 }
 EXPORT_SYMBOL_GPL(nvmf_connect_io_queue);
 
-bool nvmf_should_reconnect(struct nvme_ctrl *ctrl)
+/*
+ * Evaluate the status information returned by the transport in order to decided
+ * if a reconnect attempt should be scheduled.
+ *
+ * Do not retry when:
+ *
+ * - the DNR bit is set and the specification states no further connect
+ *   attempts with the same set of paramenters should be attempted.
+ *
+ * - when the authentication attempt fails, because the key was invalid.
+ *   This error code is set on the host side.
+ */
+bool nvmf_should_reconnect(struct nvme_ctrl *ctrl, int status)
 {
+	if (status > 0 && (status & NVME_SC_DNR))
+		return false;
+
+	if (status == -EKEYREJECTED)
+		return false;
+
 	if (ctrl->opts->max_reconnects == -1 ||
 	    ctrl->nr_reconnects < ctrl->opts->max_reconnects)
 		return true;

drivers/nvme/host/fabrics.h

@@ -223,7 +223,7 @@ int nvmf_register_transport(struct nvmf_transport_ops *ops);
 void nvmf_unregister_transport(struct nvmf_transport_ops *ops);
 void nvmf_free_options(struct nvmf_ctrl_options *opts);
 int nvmf_get_address(struct nvme_ctrl *ctrl, char *buf, int size);
-bool nvmf_should_reconnect(struct nvme_ctrl *ctrl);
+bool nvmf_should_reconnect(struct nvme_ctrl *ctrl, int status);
 bool nvmf_ip_options_match(struct nvme_ctrl *ctrl,
 		struct nvmf_ctrl_options *opts);
 void nvmf_set_io_queues(struct nvmf_ctrl_options *opts, u32 nr_io_queues,

drivers/nvme/host/fc.c

@@ -3310,12 +3310,10 @@ nvme_fc_reconnect_or_delete(struct nvme_fc_ctrl *ctrl, int status)
 		dev_info(ctrl->ctrl.device,
 			"NVME-FC{%d}: reset: Reconnect attempt failed (%d)\n",
 			ctrl->cnum, status);
-		if (status > 0 && (status & NVME_SC_DNR))
-			recon = false;
 	} else if (time_after_eq(jiffies, rport->dev_loss_end))
 		recon = false;
 
-	if (recon && nvmf_should_reconnect(&ctrl->ctrl)) {
+	if (recon && nvmf_should_reconnect(&ctrl->ctrl, status)) {
 		if (portptr->port_state == FC_OBJSTATE_ONLINE)
 			dev_info(ctrl->ctrl.device,
 				"NVME-FC{%d}: Reconnect attempt in %ld "

drivers/nvme/host/nvme.h

@@ -1148,7 +1148,7 @@ static inline int nvme_auth_negotiate(struct nvme_ctrl *ctrl, int qid)
 }
 static inline int nvme_auth_wait(struct nvme_ctrl *ctrl, int qid)
 {
-	return NVME_SC_AUTH_REQUIRED;
+	return -EPROTONOSUPPORT;
 }
 static inline void nvme_auth_free(struct nvme_ctrl *ctrl) {};
 #endif

drivers/nvme/host/rdma.c

@@ -982,7 +982,8 @@ static void nvme_rdma_free_ctrl(struct nvme_ctrl *nctrl)
 	kfree(ctrl);
 }
 
-static void nvme_rdma_reconnect_or_remove(struct nvme_rdma_ctrl *ctrl)
+static void nvme_rdma_reconnect_or_remove(struct nvme_rdma_ctrl *ctrl,
+					  int status)
 {
 	enum nvme_ctrl_state state = nvme_ctrl_state(&ctrl->ctrl);
 
@@ -992,7 +993,7 @@ static void nvme_rdma_reconnect_or_remove(struct nvme_rdma_ctrl *ctrl)
 		return;
 	}
 
-	if (nvmf_should_reconnect(&ctrl->ctrl)) {
+	if (nvmf_should_reconnect(&ctrl->ctrl, status)) {
 		dev_info(ctrl->ctrl.device, "Reconnecting in %d seconds...\n",
 			ctrl->ctrl.opts->reconnect_delay);
 		queue_delayed_work(nvme_wq, &ctrl->reconnect_work,
@@ -1104,10 +1105,12 @@ static void nvme_rdma_reconnect_ctrl_work(struct work_struct *work)
 {
 	struct nvme_rdma_ctrl *ctrl = container_of(to_delayed_work(work),
 			struct nvme_rdma_ctrl, reconnect_work);
+	int ret;
 
 	++ctrl->ctrl.nr_reconnects;
 
-	if (nvme_rdma_setup_ctrl(ctrl, false))
+	ret = nvme_rdma_setup_ctrl(ctrl, false);
+	if (ret)
 		goto requeue;
 
 	dev_info(ctrl->ctrl.device, "Successfully reconnected (%d attempts)\n",
@@ -1118,9 +1121,9 @@ static void nvme_rdma_reconnect_ctrl_work(struct work_struct *work)
 	return;
 
 requeue:
-	dev_info(ctrl->ctrl.device, "Failed reconnect attempt %d\n",
-			ctrl->ctrl.nr_reconnects);
-	nvme_rdma_reconnect_or_remove(ctrl);
+	dev_info(ctrl->ctrl.device, "Failed reconnect attempt %d/%d\n",
+		 ctrl->ctrl.nr_reconnects, ctrl->ctrl.opts->max_reconnects);
+	nvme_rdma_reconnect_or_remove(ctrl, ret);
 }
 
 static void nvme_rdma_error_recovery_work(struct work_struct *work)
@@ -1145,7 +1148,7 @@ static void nvme_rdma_error_recovery_work(struct work_struct *work)
 		return;
 	}
 
-	nvme_rdma_reconnect_or_remove(ctrl);
+	nvme_rdma_reconnect_or_remove(ctrl, 0);
 }
 
 static void nvme_rdma_error_recovery(struct nvme_rdma_ctrl *ctrl)
@@ -2169,6 +2172,7 @@ static void nvme_rdma_reset_ctrl_work(struct work_struct *work)
 {
 	struct nvme_rdma_ctrl *ctrl =
 		container_of(work, struct nvme_rdma_ctrl, ctrl.reset_work);
+	int ret;
 
 	nvme_stop_ctrl(&ctrl->ctrl);
 	nvme_rdma_shutdown_ctrl(ctrl, false);
@@ -2179,14 +2183,15 @@ static void nvme_rdma_reset_ctrl_work(struct work_struct *work)
 		return;
 	}
 
-	if (nvme_rdma_setup_ctrl(ctrl, false))
+	ret = nvme_rdma_setup_ctrl(ctrl, false);
+	if (ret)
 		goto out_fail;
 
 	return;
 
 out_fail:
 	++ctrl->ctrl.nr_reconnects;
-	nvme_rdma_reconnect_or_remove(ctrl);
+	nvme_rdma_reconnect_or_remove(ctrl, ret);
 }
 
 static const struct nvme_ctrl_ops nvme_rdma_ctrl_ops = {

drivers/nvme/host/tcp.c

@@ -2161,7 +2161,8 @@ static void nvme_tcp_teardown_io_queues(struct nvme_ctrl *ctrl,
 	nvme_tcp_destroy_io_queues(ctrl, remove);
 }
 
-static void nvme_tcp_reconnect_or_remove(struct nvme_ctrl *ctrl)
+static void nvme_tcp_reconnect_or_remove(struct nvme_ctrl *ctrl,
+		int status)
 {
 	enum nvme_ctrl_state state = nvme_ctrl_state(ctrl);
 
@@ -2171,13 +2172,14 @@ static void nvme_tcp_reconnect_or_remove(struct nvme_ctrl *ctrl)
 		return;
 	}
 
-	if (nvmf_should_reconnect(ctrl)) {
+	if (nvmf_should_reconnect(ctrl, status)) {
 		dev_info(ctrl->device, "Reconnecting in %d seconds...\n",
 			ctrl->opts->reconnect_delay);
 		queue_delayed_work(nvme_wq, &to_tcp_ctrl(ctrl)->connect_work,
 				ctrl->opts->reconnect_delay * HZ);
 	} else {
-		dev_info(ctrl->device, "Removing controller...\n");
+		dev_info(ctrl->device, "Removing controller (%d)...\n",
+			 status);
 		nvme_delete_ctrl(ctrl);
 	}
 }
@@ -2258,23 +2260,25 @@ static void nvme_tcp_reconnect_ctrl_work(struct work_struct *work)
 	struct nvme_tcp_ctrl *tcp_ctrl = container_of(to_delayed_work(work),
 			struct nvme_tcp_ctrl, connect_work);
 	struct nvme_ctrl *ctrl = &tcp_ctrl->ctrl;
+	int ret;
 
 	++ctrl->nr_reconnects;
 
-	if (nvme_tcp_setup_ctrl(ctrl, false))
+	ret = nvme_tcp_setup_ctrl(ctrl, false);
+	if (ret)
 		goto requeue;
 
-	dev_info(ctrl->device, "Successfully reconnected (%d attempt)\n",
-			ctrl->nr_reconnects);
+	dev_info(ctrl->device, "Successfully reconnected (attempt %d/%d)\n",
+		 ctrl->nr_reconnects, ctrl->opts->max_reconnects);
 
 	ctrl->nr_reconnects = 0;
 
 	return;
 
 requeue:
-	dev_info(ctrl->device, "Failed reconnect attempt %d\n",
-			ctrl->nr_reconnects);
-	nvme_tcp_reconnect_or_remove(ctrl);
+	dev_info(ctrl->device, "Failed reconnect attempt %d/%d\n",
+		 ctrl->nr_reconnects, ctrl->opts->max_reconnects);
+	nvme_tcp_reconnect_or_remove(ctrl, ret);
 }
 
 static void nvme_tcp_error_recovery_work(struct work_struct *work)
@@ -2301,7 +2305,7 @@ static void nvme_tcp_error_recovery_work(struct work_struct *work)
 		return;
 	}
 
-	nvme_tcp_reconnect_or_remove(ctrl);
+	nvme_tcp_reconnect_or_remove(ctrl, 0);
 }
 
 static void nvme_tcp_teardown_ctrl(struct nvme_ctrl *ctrl, bool shutdown)
@@ -2321,6 +2325,7 @@ static void nvme_reset_ctrl_work(struct work_struct *work)
 {
 	struct nvme_ctrl *ctrl =
 		container_of(work, struct nvme_ctrl, reset_work);
+	int ret;
 
 	nvme_stop_ctrl(ctrl);
 	nvme_tcp_teardown_ctrl(ctrl, false);
@@ -2334,14 +2339,15 @@ static void nvme_reset_ctrl_work(struct work_struct *work)
 		return;
 	}
 
-	if (nvme_tcp_setup_ctrl(ctrl, false))
+	ret = nvme_tcp_setup_ctrl(ctrl, false);
+	if (ret)
 		goto out_fail;
 
 	return;
 
 out_fail:
 	++ctrl->nr_reconnects;
-	nvme_tcp_reconnect_or_remove(ctrl);
+	nvme_tcp_reconnect_or_remove(ctrl, ret);
 }
 
 static void nvme_tcp_stop_ctrl(struct nvme_ctrl *ctrl)

drivers/nvme/target/auth.c

@@ -44,6 +44,7 @@ int nvmet_auth_set_key(struct nvmet_host *host, const char *secret,
 	dhchap_secret = kstrdup(secret, GFP_KERNEL);
 	if (!dhchap_secret)
 		return -ENOMEM;
+	down_write(&nvmet_config_sem);
 	if (set_ctrl) {
 		kfree(host->dhchap_ctrl_secret);
 		host->dhchap_ctrl_secret = strim(dhchap_secret);
@@ -53,6 +54,7 @@ int nvmet_auth_set_key(struct nvmet_host *host, const char *secret,
 		host->dhchap_secret = strim(dhchap_secret);
 		host->dhchap_key_hash = key_hash;
 	}
+	up_write(&nvmet_config_sem);
 	return 0;
 }
 
@@ -124,12 +126,11 @@ int nvmet_setup_dhgroup(struct nvmet_ctrl *ctrl, u8 dhgroup_id)
 	return ret;
 }
 
-int nvmet_setup_auth(struct nvmet_ctrl *ctrl)
+u8 nvmet_setup_auth(struct nvmet_ctrl *ctrl)
 {
 	int ret = 0;
 	struct nvmet_host_link *p;
 	struct nvmet_host *host = NULL;
-	const char *hash_name;
 
 	down_read(&nvmet_config_sem);
 	if (nvmet_is_disc_subsys(ctrl->subsys))
@@ -147,13 +148,16 @@ int nvmet_setup_auth(struct nvmet_ctrl *ctrl)
 	}
 	if (!host) {
 		pr_debug("host %s not found\n", ctrl->hostnqn);
-		ret = -EPERM;
+		ret = NVME_AUTH_DHCHAP_FAILURE_FAILED;
 		goto out_unlock;
 	}
 
 	ret = nvmet_setup_dhgroup(ctrl, host->dhchap_dhgroup_id);
-	if (ret < 0)
+	if (ret < 0) {
 		pr_warn("Failed to setup DH group");
+		ret = NVME_AUTH_DHCHAP_FAILURE_DHGROUP_UNUSABLE;
+		goto out_unlock;
+	}
 
 	if (!host->dhchap_secret) {
 		pr_debug("No authentication provided\n");
@@ -164,12 +168,6 @@ int nvmet_setup_auth(struct nvmet_ctrl *ctrl)
 		pr_debug("Re-use existing hash ID %d\n",
 			 ctrl->shash_id);
 	} else {
-		hash_name = nvme_auth_hmac_name(host->dhchap_hash_id);
-		if (!hash_name) {
-			pr_warn("Hash ID %d invalid\n", host->dhchap_hash_id);
-			ret = -EINVAL;
-			goto out_unlock;
-		}
 		ctrl->shash_id = host->dhchap_hash_id;
 	}
 
@@ -178,7 +176,7 @@ int nvmet_setup_auth(struct nvmet_ctrl *ctrl)
 	ctrl->host_key = nvme_auth_extract_key(host->dhchap_secret + 10,
 					       host->dhchap_key_hash);
 	if (IS_ERR(ctrl->host_key)) {
-		ret = PTR_ERR(ctrl->host_key);
+		ret = NVME_AUTH_DHCHAP_FAILURE_NOT_USABLE;
 		ctrl->host_key = NULL;
 		goto out_free_hash;
 	}
@@ -196,7 +194,7 @@ int nvmet_setup_auth(struct nvmet_ctrl *ctrl)
 	ctrl->ctrl_key = nvme_auth_extract_key(host->dhchap_ctrl_secret + 10,
 					       host->dhchap_ctrl_key_hash);
 	if (IS_ERR(ctrl->ctrl_key)) {
-		ret = PTR_ERR(ctrl->ctrl_key);
+		ret = NVME_AUTH_DHCHAP_FAILURE_NOT_USABLE;
 		ctrl->ctrl_key = NULL;
 		goto out_free_hash;
 	}

drivers/nvme/target/configfs.c

@@ -2007,11 +2007,17 @@ static struct config_group nvmet_ports_group;
 static ssize_t nvmet_host_dhchap_key_show(struct config_item *item,
 		char *page)
 {
-	u8 *dhchap_secret = to_host(item)->dhchap_secret;
+	u8 *dhchap_secret;
+	ssize_t ret;
 
+	down_read(&nvmet_config_sem);
+	dhchap_secret = to_host(item)->dhchap_secret;
 	if (!dhchap_secret)
-		return sprintf(page, "\n");
-	return sprintf(page, "%s\n", dhchap_secret);
+		ret = sprintf(page, "\n");
+	else
+		ret = sprintf(page, "%s\n", dhchap_secret);
+	up_read(&nvmet_config_sem);
+	return ret;
 }
 
 static ssize_t nvmet_host_dhchap_key_store(struct config_item *item,
@@ -2035,10 +2041,16 @@ static ssize_t nvmet_host_dhchap_ctrl_key_show(struct config_item *item,
 		char *page)
 {
 	u8 *dhchap_secret = to_host(item)->dhchap_ctrl_secret;
+	ssize_t ret;
 
+	down_read(&nvmet_config_sem);
+	dhchap_secret = to_host(item)->dhchap_ctrl_secret;
 	if (!dhchap_secret)
-		return sprintf(page, "\n");
-	return sprintf(page, "%s\n", dhchap_secret);
+		ret = sprintf(page, "\n");
+	else
+		ret = sprintf(page, "%s\n", dhchap_secret);
+	up_read(&nvmet_config_sem);
+	return ret;
 }
 
 static ssize_t nvmet_host_dhchap_ctrl_key_store(struct config_item *item,

drivers/nvme/target/fabrics-cmd-auth.c

@@ -31,7 +31,7 @@ void nvmet_auth_sq_init(struct nvmet_sq *sq)
 	sq->dhchap_step = NVME_AUTH_DHCHAP_MESSAGE_NEGOTIATE;
 }
 
-static u16 nvmet_auth_negotiate(struct nvmet_req *req, void *d)
+static u8 nvmet_auth_negotiate(struct nvmet_req *req, void *d)
 {
 	struct nvmet_ctrl *ctrl = req->sq->ctrl;
 	struct nvmf_auth_dhchap_negotiate_data *data = d;
@@ -109,7 +109,7 @@ static u16 nvmet_auth_negotiate(struct nvmet_req *req, void *d)
 	return 0;
 }
 
-static u16 nvmet_auth_reply(struct nvmet_req *req, void *d)
+static u8 nvmet_auth_reply(struct nvmet_req *req, void *d)
 {
 	struct nvmet_ctrl *ctrl = req->sq->ctrl;
 	struct nvmf_auth_dhchap_reply_data *data = d;
@@ -172,7 +172,7 @@ static u16 nvmet_auth_reply(struct nvmet_req *req, void *d)
 	return 0;
 }
 
-static u16 nvmet_auth_failure2(void *d)
+static u8 nvmet_auth_failure2(void *d)
 {
 	struct nvmf_auth_dhchap_failure_data *data = d;
 
@@ -186,6 +186,7 @@ void nvmet_execute_auth_send(struct nvmet_req *req)
 	void *d;
 	u32 tl;
 	u16 status = 0;
+	u8 dhchap_status;
 
 	if (req->cmd->auth_send.secp != NVME_AUTH_DHCHAP_PROTOCOL_IDENTIFIER) {
 		status = NVME_SC_INVALID_FIELD | NVME_SC_DNR;
@@ -237,30 +238,32 @@ void nvmet_execute_auth_send(struct nvmet_req *req)
 	if (data->auth_type == NVME_AUTH_COMMON_MESSAGES) {
 		if (data->auth_id == NVME_AUTH_DHCHAP_MESSAGE_NEGOTIATE) {
 			/* Restart negotiation */
-			pr_debug("%s: ctrl %d qid %d reset negotiation\n", __func__,
-				 ctrl->cntlid, req->sq->qid);
+			pr_debug("%s: ctrl %d qid %d reset negotiation\n",
+				 __func__, ctrl->cntlid, req->sq->qid);
 			if (!req->sq->qid) {
-				if (nvmet_setup_auth(ctrl) < 0) {
-					status = NVME_SC_INTERNAL;
-					pr_err("ctrl %d qid 0 failed to setup"
-					       "re-authentication",
+				dhchap_status = nvmet_setup_auth(ctrl);
+				if (dhchap_status) {
+					pr_err("ctrl %d qid 0 failed to setup re-authentication\n",
 					       ctrl->cntlid);
-					goto done_failure1;
+					req->sq->dhchap_status = dhchap_status;
+					req->sq->dhchap_step =
+						NVME_AUTH_DHCHAP_MESSAGE_FAILURE1;
+					goto done_kfree;
 				}
 			}
-			req->sq->dhchap_step = NVME_AUTH_DHCHAP_MESSAGE_NEGOTIATE;
+			req->sq->dhchap_step =
+				NVME_AUTH_DHCHAP_MESSAGE_NEGOTIATE;
 		} else if (data->auth_id != req->sq->dhchap_step)
 			goto done_failure1;
 		/* Validate negotiation parameters */
-		status = nvmet_auth_negotiate(req, d);
-		if (status == 0)
+		dhchap_status = nvmet_auth_negotiate(req, d);
+		if (dhchap_status == 0)
 			req->sq->dhchap_step =
 				NVME_AUTH_DHCHAP_MESSAGE_CHALLENGE;
 		else {
 			req->sq->dhchap_step =
 				NVME_AUTH_DHCHAP_MESSAGE_FAILURE1;
-			req->sq->dhchap_status = status;
-			status = 0;
+			req->sq->dhchap_status = dhchap_status;
 		}
 		goto done_kfree;
 	}
@@ -284,15 +287,14 @@ void nvmet_execute_auth_send(struct nvmet_req *req)
 
 	switch (data->auth_id) {
 	case NVME_AUTH_DHCHAP_MESSAGE_REPLY:
-		status = nvmet_auth_reply(req, d);
-		if (status == 0)
+		dhchap_status = nvmet_auth_reply(req, d);
+		if (dhchap_status == 0)
 			req->sq->dhchap_step =
 				NVME_AUTH_DHCHAP_MESSAGE_SUCCESS1;
 		else {
 			req->sq->dhchap_step =
 				NVME_AUTH_DHCHAP_MESSAGE_FAILURE1;
-			req->sq->dhchap_status = status;
-			status = 0;
+			req->sq->dhchap_status = dhchap_status;
 		}
 		goto done_kfree;
 	case NVME_AUTH_DHCHAP_MESSAGE_SUCCESS2:
@@ -301,13 +303,12 @@ void nvmet_execute_auth_send(struct nvmet_req *req)
 			 __func__, ctrl->cntlid, req->sq->qid);
 		goto done_kfree;
 	case NVME_AUTH_DHCHAP_MESSAGE_FAILURE2:
-		status = nvmet_auth_failure2(d);
-		if (status) {
+		dhchap_status = nvmet_auth_failure2(d);
+		if (dhchap_status) {
 			pr_warn("ctrl %d qid %d: authentication failed (%d)\n",
-				ctrl->cntlid, req->sq->qid, status);
-			req->sq->dhchap_status = status;
+				ctrl->cntlid, req->sq->qid, dhchap_status);
+			req->sq->dhchap_status = dhchap_status;
 			req->sq->authenticated = false;
-			status = 0;
 		}
 		goto done_kfree;
 	default:

drivers/nvme/target/fabrics-cmd.c

@@ -211,7 +211,7 @@ static void nvmet_execute_admin_connect(struct nvmet_req *req)
 	struct nvmf_connect_data *d;
 	struct nvmet_ctrl *ctrl = NULL;
 	u16 status;
-	int ret;
+	u8 dhchap_status;
 
 	if (!nvmet_check_transfer_len(req, sizeof(struct nvmf_connect_data)))
 		return;
@@ -254,11 +254,12 @@ static void nvmet_execute_admin_connect(struct nvmet_req *req)
 
 	uuid_copy(&ctrl->hostid, &d->hostid);
 
-	ret = nvmet_setup_auth(ctrl);
-	if (ret < 0) {
-		pr_err("Failed to setup authentication, error %d\n", ret);
+	dhchap_status = nvmet_setup_auth(ctrl);
+	if (dhchap_status) {
+		pr_err("Failed to setup authentication, dhchap status %u\n",
+		       dhchap_status);
 		nvmet_ctrl_put(ctrl);
-		if (ret == -EPERM)
+		if (dhchap_status == NVME_AUTH_DHCHAP_FAILURE_FAILED)
 			status = (NVME_SC_CONNECT_INVALID_HOST | NVME_SC_DNR);
 		else
 			status = NVME_SC_INTERNAL;

drivers/nvme/target/nvmet.h

@@ -113,8 +113,8 @@ struct nvmet_sq {
 	bool			authenticated;
 	struct delayed_work	auth_expired_work;
 	u16			dhchap_tid;
-	u16			dhchap_status;
-	int			dhchap_step;
+	u8			dhchap_status;
+	u8			dhchap_step;
 	u8			*dhchap_c1;
 	u8			*dhchap_c2;
 	u32			dhchap_s1;
@@ -714,7 +714,7 @@ void nvmet_execute_auth_receive(struct nvmet_req *req);
 int nvmet_auth_set_key(struct nvmet_host *host, const char *secret,
 		       bool set_ctrl);
 int nvmet_auth_set_host_hash(struct nvmet_host *host, const char *hash);
-int nvmet_setup_auth(struct nvmet_ctrl *ctrl);
+u8 nvmet_setup_auth(struct nvmet_ctrl *ctrl);
 void nvmet_auth_sq_init(struct nvmet_sq *sq);
 void nvmet_destroy_auth(struct nvmet_ctrl *ctrl);
 void nvmet_auth_sq_free(struct nvmet_sq *sq);
@@ -733,7 +733,7 @@ int nvmet_auth_ctrl_exponential(struct nvmet_req *req,
 int nvmet_auth_ctrl_sesskey(struct nvmet_req *req,
 			    u8 *buf, int buf_size);
 #else
-static inline int nvmet_setup_auth(struct nvmet_ctrl *ctrl)
+static inline u8 nvmet_setup_auth(struct nvmet_ctrl *ctrl)
 {
 	return 0;
 }

drivers/nvme/target/rdma.c

@@ -1806,18 +1806,14 @@ static int nvmet_rdma_cm_handler(struct rdma_cm_id *cm_id,
 
 static void nvmet_rdma_delete_ctrl(struct nvmet_ctrl *ctrl)
 {
-	struct nvmet_rdma_queue *queue;
+	struct nvmet_rdma_queue *queue, *n;
 
-restart:
 	mutex_lock(&nvmet_rdma_queue_mutex);
-	list_for_each_entry(queue, &nvmet_rdma_queue_list, queue_list) {
-		if (queue->nvme_sq.ctrl == ctrl) {
-			list_del_init(&queue->queue_list);
-			mutex_unlock(&nvmet_rdma_queue_mutex);
-
-			__nvmet_rdma_queue_disconnect(queue);
-			goto restart;
-		}
+	list_for_each_entry_safe(queue, n, &nvmet_rdma_queue_list, queue_list) {
+		if (queue->nvme_sq.ctrl != ctrl)
+			continue;
+		list_del_init(&queue->queue_list);
+		__nvmet_rdma_queue_disconnect(queue);
 	}
 	mutex_unlock(&nvmet_rdma_queue_mutex);
 }

include/trace/events/nbd.h

@@ -72,7 +72,7 @@ DECLARE_EVENT_CLASS(nbd_send_request,
 	),
 
 	TP_fast_assign(
-		__entry->nbd_request = 0;
+		__entry->nbd_request = NULL;
 		__entry->dev_index = index;
 		__entry->request = rq;
 	),