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Commit 11efae35 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'for-5.1/block-post-20190315' of git://git.kernel.dk/linux-block 

Pull more block layer changes from Jens Axboe:
 "This is a collection of both stragglers, and fixes that came in after
  I finalized the initial pull. This contains:

   - An MD pull request from Song, with a few minor fixes

   - Set of NVMe patches via Christoph

   - Pull request from Konrad, with a few fixes for xen/blkback

   - pblk fix IO calculation fix (Javier)

   - Segment calculation fix for pass-through (Ming)

   - Fallthrough annotation for blkcg (Mathieu)"

* tag 'for-5.1/block-post-20190315' of git://git.kernel.dk/linux-block: (25 commits)
  blkcg: annotate implicit fall through
  nvme-tcp: support C2HData with SUCCESS flag
  nvmet: ignore EOPNOTSUPP for discard
  nvme: add proper write zeroes setup for the multipath device
  nvme: add proper discard setup for the multipath device
  nvme: remove nvme_ns_config_oncs
  nvme: disable Write Zeroes for qemu controllers
  nvmet-fc: bring Disconnect into compliance with FC-NVME spec
  nvmet-fc: fix issues with targetport assoc_list list walking
  nvme-fc: reject reconnect if io queue count is reduced to zero
  nvme-fc: fix numa_node when dev is null
  nvme-fc: use nr_phys_segments to determine existence of sgl
  nvme-loop: init nvmet_ctrl fatal_err_work when allocate
  nvme: update comment to make the code easier to read
  nvme: put ns_head ref if namespace fails allocation
  nvme-trace: fix cdw10 buffer overrun
  nvme: don't warn on block content change effects
  nvme: add get-feature to admin cmds tracer
  md: Fix failed allocation of md_register_thread
  It's wrong to add len to sector_nr in raid10 reshape twice
  ...
parents 465c209d f6d85f04

Documentation/admin-guide/md.rst

+3 −0
Original line number Diff line number Diff line
@@ -756,3 +756,6 @@ These currently include: 
      The cache mode for raid5. raid5 could include an extra disk for

      caching. The mode can be "write-throuth" and "write-back". The

      default is "write-through".



  ppl_write_hint

      NVMe stream ID to be set for each PPL write request.

block/blk-merge.c

+8 −7
Original line number Diff line number Diff line
@@ -180,7 +180,7 @@ static unsigned get_max_segment_size(struct request_queue *q, 
 */

static bool bvec_split_segs(struct request_queue *q, struct bio_vec *bv,

		unsigned *nsegs, unsigned *last_seg_size,

		unsigned *front_seg_size, unsigned *sectors)

		unsigned *front_seg_size, unsigned *sectors, unsigned max_segs)

{

	unsigned len = bv->bv_len;

	unsigned total_len = 0;
@@ -190,7 +190,7 @@ static bool bvec_split_segs(struct request_queue *q, struct bio_vec *bv, 
	 * Multi-page bvec may be too big to hold in one segment, so the

	 * current bvec has to be splitted as multiple segments.

	 */

	while (len && new_nsegs + *nsegs < queue_max_segments(q)) {

	while (len && new_nsegs + *nsegs < max_segs) {

		seg_size = get_max_segment_size(q, bv->bv_offset + total_len);

		seg_size = min(seg_size, len);
@@ -240,6 +240,7 @@ static struct bio *blk_bio_segment_split(struct request_queue *q, 
	bool do_split = true;

	struct bio *new = NULL;

	const unsigned max_sectors = get_max_io_size(q, bio);

	const unsigned max_segs = queue_max_segments(q);



	bio_for_each_bvec(bv, bio, iter) {

		/*
@@ -254,14 +255,14 @@ static struct bio *blk_bio_segment_split(struct request_queue *q, 
			 * Consider this a new segment if we're splitting in

			 * the middle of this vector.

			 */

			if (nsegs < queue_max_segments(q) &&

			if (nsegs < max_segs &&

			    sectors < max_sectors) {

				/* split in the middle of bvec */

				bv.bv_len = (max_sectors - sectors) << 9;

				bvec_split_segs(q, &bv, &nsegs,

						&seg_size,

						&front_seg_size,

						&sectors);

						&sectors, max_segs);

			}

			goto split;

		}
@@ -283,7 +284,7 @@ static struct bio *blk_bio_segment_split(struct request_queue *q, 
			continue;

		}

new_segment:

		if (nsegs == queue_max_segments(q))

		if (nsegs == max_segs)

			goto split;



		bvprv = bv;
@@ -296,7 +297,7 @@ static struct bio *blk_bio_segment_split(struct request_queue *q, 
			if (nsegs == 1 && seg_size > front_seg_size)

				front_seg_size = seg_size;

		} else if (bvec_split_segs(q, &bv, &nsegs, &seg_size,

				    &front_seg_size, &sectors)) {

				    &front_seg_size, &sectors, max_segs)) {

			goto split;

		}

	}
@@ -415,7 +416,7 @@ static unsigned int __blk_recalc_rq_segments(struct request_queue *q, 
			bvprv = bv;

			prev = 1;

			bvec_split_segs(q, &bv, &nr_phys_segs, &seg_size,

					&front_seg_size, NULL);

					&front_seg_size, NULL, UINT_MAX);

		}

		bbio = bio;

	}

drivers/block/xen-blkback/xenbus.c

+57 −42
Original line number Diff line number Diff line
@@ -926,7 +926,7 @@ static int read_per_ring_refs(struct xen_blkif_ring *ring, const char *dir) 
	int err, i, j;

	struct xen_blkif *blkif = ring->blkif;

	struct xenbus_device *dev = blkif->be->dev;

	unsigned int ring_page_order, nr_grefs, evtchn;

	unsigned int nr_grefs, evtchn;



	err = xenbus_scanf(XBT_NIL, dir, "event-channel", "%u",

			  &evtchn);
@@ -936,43 +936,42 @@ static int read_per_ring_refs(struct xen_blkif_ring *ring, const char *dir) 
		return err;

	}



	err = xenbus_scanf(XBT_NIL, dev->otherend, "ring-page-order", "%u",

			  &ring_page_order);

	if (err != 1) {

		err = xenbus_scanf(XBT_NIL, dir, "ring-ref", "%u", &ring_ref[0]);

		if (err != 1) {

			err = -EINVAL;

			xenbus_dev_fatal(dev, err, "reading %s/ring-ref", dir);

			return err;

		}

		nr_grefs = 1;

	} else {

		unsigned int i;

	nr_grefs = blkif->nr_ring_pages;



		if (ring_page_order > xen_blkif_max_ring_order) {

			err = -EINVAL;

			xenbus_dev_fatal(dev, err, "%s/request %d ring page order exceed max:%d",

					 dir, ring_page_order,

					 xen_blkif_max_ring_order);

			return err;

	if (unlikely(!nr_grefs)) {

		WARN_ON(true);

		return -EINVAL;

	}



		nr_grefs = 1 << ring_page_order;

	for (i = 0; i < nr_grefs; i++) {

		char ring_ref_name[RINGREF_NAME_LEN];



		snprintf(ring_ref_name, RINGREF_NAME_LEN, "ring-ref%u", i);

		err = xenbus_scanf(XBT_NIL, dir, ring_ref_name,

				   "%u", &ring_ref[i]);



		if (err != 1) {

			if (nr_grefs == 1)

				break;



			err = -EINVAL;

			xenbus_dev_fatal(dev, err, "reading %s/%s",

					 dir, ring_ref_name);

			return err;

		}

	}



	if (err != 1) {

		WARN_ON(nr_grefs != 1);



		err = xenbus_scanf(XBT_NIL, dir, "ring-ref", "%u",

				   &ring_ref[0]);

		if (err != 1) {

			err = -EINVAL;

			xenbus_dev_fatal(dev, err, "reading %s/ring-ref", dir);

			return err;

		}

	}

	blkif->nr_ring_pages = nr_grefs;



	for (i = 0; i < nr_grefs * XEN_BLKIF_REQS_PER_PAGE; i++) {

		req = kzalloc(sizeof(*req), GFP_KERNEL);
@@ -1023,6 +1022,7 @@ static int read_per_ring_refs(struct xen_blkif_ring *ring, const char *dir) 
static int connect_ring(struct backend_info *be)

{

	struct xenbus_device *dev = be->dev;

	struct xen_blkif *blkif = be->blkif;

	unsigned int pers_grants;

	char protocol[64] = "";

	int err, i;
@@ -1030,28 +1030,29 @@ static int connect_ring(struct backend_info *be) 
	size_t xspathsize;

	const size_t xenstore_path_ext_size = 11; /* sufficient for "/queue-NNN" */

	unsigned int requested_num_queues = 0;

	unsigned int ring_page_order;



	pr_debug("%s %s\n", __func__, dev->otherend);



	be->blkif->blk_protocol = BLKIF_PROTOCOL_DEFAULT;

	blkif->blk_protocol = BLKIF_PROTOCOL_DEFAULT;

	err = xenbus_scanf(XBT_NIL, dev->otherend, "protocol",

			   "%63s", protocol);

	if (err <= 0)

		strcpy(protocol, "unspecified, assuming default");

	else if (0 == strcmp(protocol, XEN_IO_PROTO_ABI_NATIVE))

		be->blkif->blk_protocol = BLKIF_PROTOCOL_NATIVE;

		blkif->blk_protocol = BLKIF_PROTOCOL_NATIVE;

	else if (0 == strcmp(protocol, XEN_IO_PROTO_ABI_X86_32))

		be->blkif->blk_protocol = BLKIF_PROTOCOL_X86_32;

		blkif->blk_protocol = BLKIF_PROTOCOL_X86_32;

	else if (0 == strcmp(protocol, XEN_IO_PROTO_ABI_X86_64))

		be->blkif->blk_protocol = BLKIF_PROTOCOL_X86_64;

		blkif->blk_protocol = BLKIF_PROTOCOL_X86_64;

	else {

		xenbus_dev_fatal(dev, err, "unknown fe protocol %s", protocol);

		return -ENOSYS;

	}

	pers_grants = xenbus_read_unsigned(dev->otherend, "feature-persistent",

					   0);

	be->blkif->vbd.feature_gnt_persistent = pers_grants;

	be->blkif->vbd.overflow_max_grants = 0;

	blkif->vbd.feature_gnt_persistent = pers_grants;

	blkif->vbd.overflow_max_grants = 0;



	/*

	 * Read the number of hardware queues from frontend.
@@ -1067,16 +1068,30 @@ static int connect_ring(struct backend_info *be) 
				requested_num_queues, xenblk_max_queues);

		return -ENOSYS;

	}

	be->blkif->nr_rings = requested_num_queues;

	if (xen_blkif_alloc_rings(be->blkif))

	blkif->nr_rings = requested_num_queues;

	if (xen_blkif_alloc_rings(blkif))

		return -ENOMEM;



	pr_info("%s: using %d queues, protocol %d (%s) %s\n", dev->nodename,

		 be->blkif->nr_rings, be->blkif->blk_protocol, protocol,

		 blkif->nr_rings, blkif->blk_protocol, protocol,

		 pers_grants ? "persistent grants" : "");



	if (be->blkif->nr_rings == 1)

		return read_per_ring_refs(&be->blkif->rings[0], dev->otherend);

	ring_page_order = xenbus_read_unsigned(dev->otherend,

					       "ring-page-order", 0);



	if (ring_page_order > xen_blkif_max_ring_order) {

		err = -EINVAL;

		xenbus_dev_fatal(dev, err,

				 "requested ring page order %d exceed max:%d",

				 ring_page_order,

				 xen_blkif_max_ring_order);

		return err;

	}



	blkif->nr_ring_pages = 1 << ring_page_order;



	if (blkif->nr_rings == 1)

		return read_per_ring_refs(&blkif->rings[0], dev->otherend);

	else {

		xspathsize = strlen(dev->otherend) + xenstore_path_ext_size;

		xspath = kmalloc(xspathsize, GFP_KERNEL);
@@ -1085,10 +1100,10 @@ static int connect_ring(struct backend_info *be) 
			return -ENOMEM;

		}



		for (i = 0; i < be->blkif->nr_rings; i++) {

		for (i = 0; i < blkif->nr_rings; i++) {

			memset(xspath, 0, xspathsize);

			snprintf(xspath, xspathsize, "%s/queue-%u", dev->otherend, i);

			err = read_per_ring_refs(&be->blkif->rings[i], xspath);

			err = read_per_ring_refs(&blkif->rings[i], xspath);

			if (err) {

				kfree(xspath);

				return err;

drivers/lightnvm/pblk-rl.c

+6 −1
Original line number Diff line number Diff line
@@ -233,10 +233,15 @@ void pblk_rl_init(struct pblk_rl *rl, int budget, int threshold) 
	/* To start with, all buffer is available to user I/O writers */

	rl->rb_budget = budget;

	rl->rb_user_max = budget;

	rl->rb_max_io = threshold ? (budget - threshold) : (budget - 1);

	rl->rb_gc_max = 0;

	rl->rb_state = PBLK_RL_HIGH;



	/* Maximize I/O size and ansure that back threshold is respected */

	if (threshold)

		rl->rb_max_io = budget - pblk->min_write_pgs_data - threshold;

	else

		rl->rb_max_io = budget - pblk->min_write_pgs_data - 1;



	atomic_set(&rl->rb_user_cnt, 0);

	atomic_set(&rl->rb_gc_cnt, 0);

	atomic_set(&rl->rb_space, -1);

drivers/md/raid10.c

+2 −1
Original line number Diff line number Diff line
@@ -3939,6 +3939,8 @@ static int raid10_run(struct mddev *mddev) 
		set_bit(MD_RECOVERY_RUNNING, &mddev->recovery);

		mddev->sync_thread = md_register_thread(md_do_sync, mddev,

							"reshape");

		if (!mddev->sync_thread)

			goto out_free_conf;

	}



	return 0;
@@ -4670,7 +4672,6 @@ static sector_t reshape_request(struct mddev *mddev, sector_t sector_nr, 
	atomic_inc(&r10_bio->remaining);

	read_bio->bi_next = NULL;

	generic_make_request(read_bio);

	sector_nr += nr_sectors;

	sectors_done += nr_sectors;

	if (sector_nr <= last)

		goto read_more;