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Commit 04e904aa authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.dk/linux-block 

Pull block fixes from Jens Axboe:
 "A few fixes for the current series that should go into -rc4. This
  contains:

   - a fix for a potential corruption of un-started requests from Ming.

   - a blk-stat fix from Omar, ensuring we flush the stat batch before
     checking nr_samples.

   - a set of fixes from Sagi for the nvmeof family"

* 'for-linus' of git://git.kernel.dk/linux-block:
  blk-mq: don't complete un-started request in timeout handler
  nvme-loop: handle cpu unplug when re-establishing the controller
  nvme-rdma: handle cpu unplug when re-establishing the controller
  nvmet-rdma: Fix a possible uninitialized variable dereference
  nvmet: confirm sq percpu has scheduled and switched to atomic
  nvme-loop: fix a possible use-after-free when destroying the admin queue
  blk-stat: fix blk_stat_sum() if all samples are batched
parents 59d9cb91 95a49603

block/blk-mq.c

+1 −10
Original line number Diff line number Diff line
@@ -697,17 +697,8 @@ static void blk_mq_check_expired(struct blk_mq_hw_ctx *hctx, 
{

	struct blk_mq_timeout_data *data = priv;



	if (!test_bit(REQ_ATOM_STARTED, &rq->atomic_flags)) {

		/*

		 * If a request wasn't started before the queue was

		 * marked dying, kill it here or it'll go unnoticed.

		 */

		if (unlikely(blk_queue_dying(rq->q))) {

			rq->errors = -EIO;

			blk_mq_end_request(rq, rq->errors);

		}

	if (!test_bit(REQ_ATOM_STARTED, &rq->atomic_flags))

		return;

	}



	if (time_after_eq(jiffies, rq->deadline)) {

		if (!blk_mark_rq_complete(rq))

block/blk-stat.c

+2 −2
Original line number Diff line number Diff line
@@ -30,11 +30,11 @@ static void blk_stat_flush_batch(struct blk_rq_stat *stat) 


static void blk_stat_sum(struct blk_rq_stat *dst, struct blk_rq_stat *src)

{

	blk_stat_flush_batch(src);



	if (!src->nr_samples)

		return;



	blk_stat_flush_batch(src);



	dst->min = min(dst->min, src->min);

	dst->max = max(dst->max, src->max);

drivers/nvme/host/rdma.c

+14 −14
Original line number Diff line number Diff line
@@ -343,8 +343,6 @@ static int __nvme_rdma_init_request(struct nvme_rdma_ctrl *ctrl, 
	struct ib_device *ibdev = dev->dev;

	int ret;



	BUG_ON(queue_idx >= ctrl->queue_count);



	ret = nvme_rdma_alloc_qe(ibdev, &req->sqe, sizeof(struct nvme_command),

			DMA_TO_DEVICE);

	if (ret)
@@ -652,8 +650,22 @@ static int nvme_rdma_connect_io_queues(struct nvme_rdma_ctrl *ctrl) 


static int nvme_rdma_init_io_queues(struct nvme_rdma_ctrl *ctrl)

{

	struct nvmf_ctrl_options *opts = ctrl->ctrl.opts;

	unsigned int nr_io_queues;

	int i, ret;



	nr_io_queues = min(opts->nr_io_queues, num_online_cpus());

	ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues);

	if (ret)

		return ret;



	ctrl->queue_count = nr_io_queues + 1;

	if (ctrl->queue_count < 2)

		return 0;



	dev_info(ctrl->ctrl.device,

		"creating %d I/O queues.\n", nr_io_queues);



	for (i = 1; i < ctrl->queue_count; i++) {

		ret = nvme_rdma_init_queue(ctrl, i,

					   ctrl->ctrl.opts->queue_size);
@@ -1791,20 +1803,8 @@ static const struct nvme_ctrl_ops nvme_rdma_ctrl_ops = { 


static int nvme_rdma_create_io_queues(struct nvme_rdma_ctrl *ctrl)

{

	struct nvmf_ctrl_options *opts = ctrl->ctrl.opts;

	int ret;



	ret = nvme_set_queue_count(&ctrl->ctrl, &opts->nr_io_queues);

	if (ret)

		return ret;



	ctrl->queue_count = opts->nr_io_queues + 1;

	if (ctrl->queue_count < 2)

		return 0;



	dev_info(ctrl->ctrl.device,

		"creating %d I/O queues.\n", opts->nr_io_queues);



	ret = nvme_rdma_init_io_queues(ctrl);

	if (ret)

		return ret;

drivers/nvme/target/core.c

+10 −1
Original line number Diff line number Diff line
@@ -425,6 +425,13 @@ void nvmet_sq_setup(struct nvmet_ctrl *ctrl, struct nvmet_sq *sq, 
	ctrl->sqs[qid] = sq;

}



static void nvmet_confirm_sq(struct percpu_ref *ref)

{

	struct nvmet_sq *sq = container_of(ref, struct nvmet_sq, ref);



	complete(&sq->confirm_done);

}



void nvmet_sq_destroy(struct nvmet_sq *sq)

{

	/*
@@ -433,7 +440,8 @@ void nvmet_sq_destroy(struct nvmet_sq *sq) 
	 */

	if (sq->ctrl && sq->ctrl->sqs && sq->ctrl->sqs[0] == sq)

		nvmet_async_events_free(sq->ctrl);

	percpu_ref_kill(&sq->ref);

	percpu_ref_kill_and_confirm(&sq->ref, nvmet_confirm_sq);

	wait_for_completion(&sq->confirm_done);

	wait_for_completion(&sq->free_done);

	percpu_ref_exit(&sq->ref);
@@ -461,6 +469,7 @@ int nvmet_sq_init(struct nvmet_sq *sq) 
		return ret;

	}

	init_completion(&sq->free_done);

	init_completion(&sq->confirm_done);



	return 0;

}

drivers/nvme/target/loop.c

+51 −39
Original line number Diff line number Diff line
@@ -223,8 +223,6 @@ static void nvme_loop_submit_async_event(struct nvme_ctrl *arg, int aer_idx) 
static int nvme_loop_init_iod(struct nvme_loop_ctrl *ctrl,

		struct nvme_loop_iod *iod, unsigned int queue_idx)

{

	BUG_ON(queue_idx >= ctrl->queue_count);



	iod->req.cmd = &iod->cmd;

	iod->req.rsp = &iod->rsp;

	iod->queue = &ctrl->queues[queue_idx];
@@ -288,9 +286,9 @@ static struct blk_mq_ops nvme_loop_admin_mq_ops = { 


static void nvme_loop_destroy_admin_queue(struct nvme_loop_ctrl *ctrl)

{

	nvmet_sq_destroy(&ctrl->queues[0].nvme_sq);

	blk_cleanup_queue(ctrl->ctrl.admin_q);

	blk_mq_free_tag_set(&ctrl->admin_tag_set);

	nvmet_sq_destroy(&ctrl->queues[0].nvme_sq);

}



static void nvme_loop_free_ctrl(struct nvme_ctrl *nctrl)
@@ -314,6 +312,43 @@ static void nvme_loop_free_ctrl(struct nvme_ctrl *nctrl) 
	kfree(ctrl);

}



static void nvme_loop_destroy_io_queues(struct nvme_loop_ctrl *ctrl)

{

	int i;



	for (i = 1; i < ctrl->queue_count; i++)

		nvmet_sq_destroy(&ctrl->queues[i].nvme_sq);

}



static int nvme_loop_init_io_queues(struct nvme_loop_ctrl *ctrl)

{

	struct nvmf_ctrl_options *opts = ctrl->ctrl.opts;

	unsigned int nr_io_queues;

	int ret, i;



	nr_io_queues = min(opts->nr_io_queues, num_online_cpus());

	ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues);

	if (ret || !nr_io_queues)

		return ret;



	dev_info(ctrl->ctrl.device, "creating %d I/O queues.\n", nr_io_queues);



	for (i = 1; i <= nr_io_queues; i++) {

		ctrl->queues[i].ctrl = ctrl;

		ret = nvmet_sq_init(&ctrl->queues[i].nvme_sq);

		if (ret)

			goto out_destroy_queues;



		ctrl->queue_count++;

	}



	return 0;



out_destroy_queues:

	nvme_loop_destroy_io_queues(ctrl);

	return ret;

}



static int nvme_loop_configure_admin_queue(struct nvme_loop_ctrl *ctrl)

{

	int error;
@@ -385,17 +420,13 @@ static int nvme_loop_configure_admin_queue(struct nvme_loop_ctrl *ctrl) 


static void nvme_loop_shutdown_ctrl(struct nvme_loop_ctrl *ctrl)

{

	int i;



	nvme_stop_keep_alive(&ctrl->ctrl);



	if (ctrl->queue_count > 1) {

		nvme_stop_queues(&ctrl->ctrl);

		blk_mq_tagset_busy_iter(&ctrl->tag_set,

					nvme_cancel_request, &ctrl->ctrl);



		for (i = 1; i < ctrl->queue_count; i++)

			nvmet_sq_destroy(&ctrl->queues[i].nvme_sq);

		nvme_loop_destroy_io_queues(ctrl);

	}



	if (ctrl->ctrl.state == NVME_CTRL_LIVE)
@@ -467,19 +498,14 @@ static void nvme_loop_reset_ctrl_work(struct work_struct *work) 
	if (ret)

		goto out_disable;



	for (i = 1; i <= ctrl->ctrl.opts->nr_io_queues; i++) {

		ctrl->queues[i].ctrl = ctrl;

		ret = nvmet_sq_init(&ctrl->queues[i].nvme_sq);

	ret = nvme_loop_init_io_queues(ctrl);

	if (ret)

			goto out_free_queues;



		ctrl->queue_count++;

	}

		goto out_destroy_admin;



	for (i = 1; i <= ctrl->ctrl.opts->nr_io_queues; i++) {

	for (i = 1; i < ctrl->queue_count; i++) {

		ret = nvmf_connect_io_queue(&ctrl->ctrl, i);

		if (ret)

			goto out_free_queues;

			goto out_destroy_io;

	}



	changed = nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_LIVE);
@@ -492,9 +518,9 @@ static void nvme_loop_reset_ctrl_work(struct work_struct *work) 


	return;



out_free_queues:

	for (i = 1; i < ctrl->queue_count; i++)

		nvmet_sq_destroy(&ctrl->queues[i].nvme_sq);

out_destroy_io:

	nvme_loop_destroy_io_queues(ctrl);

out_destroy_admin:

	nvme_loop_destroy_admin_queue(ctrl);

out_disable:

	dev_warn(ctrl->ctrl.device, "Removing after reset failure\n");
@@ -533,24 +559,11 @@ static const struct nvme_ctrl_ops nvme_loop_ctrl_ops = { 


static int nvme_loop_create_io_queues(struct nvme_loop_ctrl *ctrl)

{

	struct nvmf_ctrl_options *opts = ctrl->ctrl.opts;

	int ret, i;



	ret = nvme_set_queue_count(&ctrl->ctrl, &opts->nr_io_queues);

	if (ret || !opts->nr_io_queues)

		return ret;



	dev_info(ctrl->ctrl.device, "creating %d I/O queues.\n",

		opts->nr_io_queues);



	for (i = 1; i <= opts->nr_io_queues; i++) {

		ctrl->queues[i].ctrl = ctrl;

		ret = nvmet_sq_init(&ctrl->queues[i].nvme_sq);

	ret = nvme_loop_init_io_queues(ctrl);

	if (ret)

			goto out_destroy_queues;



		ctrl->queue_count++;

	}

		return ret;



	memset(&ctrl->tag_set, 0, sizeof(ctrl->tag_set));

	ctrl->tag_set.ops = &nvme_loop_mq_ops;
@@ -575,7 +588,7 @@ static int nvme_loop_create_io_queues(struct nvme_loop_ctrl *ctrl) 
		goto out_free_tagset;

	}



	for (i = 1; i <= opts->nr_io_queues; i++) {

	for (i = 1; i < ctrl->queue_count; i++) {

		ret = nvmf_connect_io_queue(&ctrl->ctrl, i);

		if (ret)

			goto out_cleanup_connect_q;
@@ -588,8 +601,7 @@ static int nvme_loop_create_io_queues(struct nvme_loop_ctrl *ctrl) 
out_free_tagset:

	blk_mq_free_tag_set(&ctrl->tag_set);

out_destroy_queues:

	for (i = 1; i < ctrl->queue_count; i++)

		nvmet_sq_destroy(&ctrl->queues[i].nvme_sq);

	nvme_loop_destroy_io_queues(ctrl);

	return ret;

}