block: add a report_zones method
Dispatching a report zones command through the request queue is a major pain due to the command reply payload rewriting necessary. Given that blkdev_report_zones() is executing everything synchronously, implement report zones as a block device file operation instead, allowing major simplification of the code in many places. sd, null-blk, dm-linear and dm-flakey being the only block device drivers supporting exposing zoned block devices, these drivers are modified to provide the device side implementation of the report_zones() block device file operation. For device mappers, a new report_zones() target type operation is defined so that the upper block layer calls blkdev_report_zones() can be propagated down to the underlying devices of the dm targets. Implementation for this new operation is added to the dm-linear and dm-flakey targets. Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Christoph Hellwig <hch@lst.de> [Damien] * Changed method block_device argument to gendisk * Various bug fixes and improvements * Added support for null_blk, dm-linear and dm-flakey. Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
Jens Axboe
parent
965b652e90
commit
e76239a374
@ -2300,7 +2300,6 @@ generic_make_request_checks(struct bio *bio)
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if (!q->limits.max_write_same_sectors)
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goto not_supported;
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break;
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case REQ_OP_ZONE_REPORT:
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case REQ_OP_ZONE_RESET:
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if (!blk_queue_is_zoned(q))
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goto not_supported;
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@ -283,7 +283,6 @@ static const char *const op_name[] = {
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REQ_OP_NAME(WRITE),
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REQ_OP_NAME(FLUSH),
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REQ_OP_NAME(DISCARD),
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REQ_OP_NAME(ZONE_REPORT),
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REQ_OP_NAME(SECURE_ERASE),
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REQ_OP_NAME(ZONE_RESET),
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REQ_OP_NAME(WRITE_SAME),
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@ -93,13 +93,10 @@ unsigned int blkdev_nr_zones(struct block_device *bdev)
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EXPORT_SYMBOL_GPL(blkdev_nr_zones);
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/*
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* Check that a zone report belongs to the partition.
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* If yes, fix its start sector and write pointer, copy it in the
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* zone information array and return true. Return false otherwise.
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* Check that a zone report belongs to this partition, and if yes, fix its start
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* sector and write pointer and return true. Return false otherwise.
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*/
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static bool blkdev_report_zone(struct block_device *bdev,
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struct blk_zone *rep,
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struct blk_zone *zone)
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static bool blkdev_report_zone(struct block_device *bdev, struct blk_zone *rep)
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{
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sector_t offset = get_start_sect(bdev);
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@ -114,11 +111,36 @@ static bool blkdev_report_zone(struct block_device *bdev,
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rep->wp = rep->start + rep->len;
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else
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rep->wp -= offset;
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memcpy(zone, rep, sizeof(struct blk_zone));
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return true;
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}
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static int blk_report_zones(struct gendisk *disk, sector_t sector,
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struct blk_zone *zones, unsigned int *nr_zones,
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gfp_t gfp_mask)
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{
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struct request_queue *q = disk->queue;
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unsigned int z = 0, n, nrz = *nr_zones;
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sector_t capacity = get_capacity(disk);
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int ret;
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while (z < nrz && sector < capacity) {
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n = nrz - z;
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ret = disk->fops->report_zones(disk, sector, &zones[z], &n,
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gfp_mask);
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if (ret)
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return ret;
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if (!n)
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break;
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sector += blk_queue_zone_sectors(q) * n;
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z += n;
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}
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WARN_ON(z > *nr_zones);
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*nr_zones = z;
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return 0;
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}
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/**
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* blkdev_report_zones - Get zones information
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* @bdev: Target block device
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@ -133,130 +155,46 @@ static bool blkdev_report_zone(struct block_device *bdev,
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* requested by @nr_zones. The number of zones actually reported is
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* returned in @nr_zones.
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*/
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int blkdev_report_zones(struct block_device *bdev,
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sector_t sector,
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struct blk_zone *zones,
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unsigned int *nr_zones,
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int blkdev_report_zones(struct block_device *bdev, sector_t sector,
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struct blk_zone *zones, unsigned int *nr_zones,
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gfp_t gfp_mask)
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{
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struct request_queue *q = bdev_get_queue(bdev);
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struct blk_zone_report_hdr *hdr;
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unsigned int nrz = *nr_zones;
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struct page *page;
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unsigned int nr_rep;
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size_t rep_bytes;
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unsigned int nr_pages;
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struct bio *bio;
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struct bio_vec *bv;
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unsigned int i, n, nz;
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unsigned int ofst;
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void *addr;
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unsigned int i, nrz;
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int ret;
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if (!q)
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return -ENXIO;
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if (!blk_queue_is_zoned(q))
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return -EOPNOTSUPP;
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if (!nrz)
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return 0;
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/*
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* A block device that advertized itself as zoned must have a
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* report_zones method. If it does not have one defined, the device
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* driver has a bug. So warn about that.
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*/
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if (WARN_ON_ONCE(!bdev->bd_disk->fops->report_zones))
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return -EOPNOTSUPP;
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if (sector > bdev->bd_part->nr_sects) {
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if (!*nr_zones || sector >= bdev->bd_part->nr_sects) {
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*nr_zones = 0;
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return 0;
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}
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/*
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* The zone report has a header. So make room for it in the
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* payload. Also make sure that the report fits in a single BIO
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* that will not be split down the stack.
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*/
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rep_bytes = sizeof(struct blk_zone_report_hdr) +
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sizeof(struct blk_zone) * nrz;
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rep_bytes = (rep_bytes + PAGE_SIZE - 1) & PAGE_MASK;
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if (rep_bytes > (queue_max_sectors(q) << 9))
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rep_bytes = queue_max_sectors(q) << 9;
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nr_pages = min_t(unsigned int, BIO_MAX_PAGES,
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rep_bytes >> PAGE_SHIFT);
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nr_pages = min_t(unsigned int, nr_pages,
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queue_max_segments(q));
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bio = bio_alloc(gfp_mask, nr_pages);
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if (!bio)
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return -ENOMEM;
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bio_set_dev(bio, bdev);
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bio->bi_iter.bi_sector = blk_zone_start(q, sector);
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bio_set_op_attrs(bio, REQ_OP_ZONE_REPORT, 0);
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for (i = 0; i < nr_pages; i++) {
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page = alloc_page(gfp_mask);
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if (!page) {
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ret = -ENOMEM;
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goto out;
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}
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if (!bio_add_page(bio, page, PAGE_SIZE, 0)) {
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__free_page(page);
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break;
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}
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}
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if (i == 0)
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ret = -ENOMEM;
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else
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ret = submit_bio_wait(bio);
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nrz = min(*nr_zones,
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__blkdev_nr_zones(q, bdev->bd_part->nr_sects - sector));
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ret = blk_report_zones(bdev->bd_disk, get_start_sect(bdev) + sector,
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zones, &nrz, gfp_mask);
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if (ret)
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goto out;
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return ret;
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/*
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* Process the report result: skip the header and go through the
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* reported zones to fixup and fixup the zone information for
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* partitions. At the same time, return the zone information into
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* the zone array.
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*/
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n = 0;
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nz = 0;
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nr_rep = 0;
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bio_for_each_segment_all(bv, bio, i) {
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if (!bv->bv_page)
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for (i = 0; i < nrz; i++) {
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if (!blkdev_report_zone(bdev, zones))
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break;
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addr = kmap_atomic(bv->bv_page);
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/* Get header in the first page */
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ofst = 0;
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if (!nr_rep) {
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hdr = addr;
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nr_rep = hdr->nr_zones;
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ofst = sizeof(struct blk_zone_report_hdr);
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}
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/* Fixup and report zones */
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while (ofst < bv->bv_len &&
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n < nr_rep && nz < nrz) {
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if (blkdev_report_zone(bdev, addr + ofst, &zones[nz]))
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nz++;
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ofst += sizeof(struct blk_zone);
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n++;
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}
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kunmap_atomic(addr);
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if (n >= nr_rep || nz >= nrz)
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break;
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zones++;
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}
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*nr_zones = nz;
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out:
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bio_for_each_segment_all(bv, bio, i)
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__free_page(bv->bv_page);
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bio_put(bio);
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*nr_zones = i;
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return ret;
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return 0;
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}
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EXPORT_SYMBOL_GPL(blkdev_report_zones);
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@ -87,7 +87,9 @@ struct nullb {
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#ifdef CONFIG_BLK_DEV_ZONED
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int null_zone_init(struct nullb_device *dev);
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void null_zone_exit(struct nullb_device *dev);
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blk_status_t null_zone_report(struct nullb *nullb, struct bio *bio);
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int null_zone_report(struct gendisk *disk, sector_t sector,
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struct blk_zone *zones, unsigned int *nr_zones,
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gfp_t gfp_mask);
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void null_zone_write(struct nullb_cmd *cmd, sector_t sector,
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unsigned int nr_sectors);
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void null_zone_reset(struct nullb_cmd *cmd, sector_t sector);
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@ -97,10 +99,11 @@ static inline int null_zone_init(struct nullb_device *dev)
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return -EINVAL;
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}
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static inline void null_zone_exit(struct nullb_device *dev) {}
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static inline blk_status_t null_zone_report(struct nullb *nullb,
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struct bio *bio)
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static inline int null_zone_report(struct gendisk *disk, sector_t sector,
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struct blk_zone *zones,
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unsigned int *nr_zones, gfp_t gfp_mask)
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{
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return BLK_STS_NOTSUPP;
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return -EOPNOTSUPP;
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}
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static inline void null_zone_write(struct nullb_cmd *cmd, sector_t sector,
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unsigned int nr_sectors)
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@ -1129,34 +1129,12 @@ static void null_restart_queue_async(struct nullb *nullb)
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blk_mq_start_stopped_hw_queues(q, true);
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}
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static bool cmd_report_zone(struct nullb *nullb, struct nullb_cmd *cmd)
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{
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struct nullb_device *dev = cmd->nq->dev;
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if (dev->queue_mode == NULL_Q_BIO) {
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if (bio_op(cmd->bio) == REQ_OP_ZONE_REPORT) {
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cmd->error = null_zone_report(nullb, cmd->bio);
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return true;
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}
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} else {
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if (req_op(cmd->rq) == REQ_OP_ZONE_REPORT) {
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cmd->error = null_zone_report(nullb, cmd->rq->bio);
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return true;
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}
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}
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return false;
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}
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static blk_status_t null_handle_cmd(struct nullb_cmd *cmd)
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{
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struct nullb_device *dev = cmd->nq->dev;
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struct nullb *nullb = dev->nullb;
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int err = 0;
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if (cmd_report_zone(nullb, cmd))
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goto out;
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if (test_bit(NULLB_DEV_FL_THROTTLED, &dev->flags)) {
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struct request *rq = cmd->rq;
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@ -1443,6 +1421,7 @@ static const struct block_device_operations null_fops = {
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.owner = THIS_MODULE,
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.open = null_open,
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.release = null_release,
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.report_zones = null_zone_report,
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};
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static void null_init_queue(struct nullb *nullb, struct nullb_queue *nq)
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@ -48,54 +48,27 @@ void null_zone_exit(struct nullb_device *dev)
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kvfree(dev->zones);
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}
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static void null_zone_fill_bio(struct nullb_device *dev, struct bio *bio,
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unsigned int zno, unsigned int nr_zones)
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{
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struct blk_zone_report_hdr *hdr = NULL;
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struct bio_vec bvec;
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struct bvec_iter iter;
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void *addr;
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unsigned int zones_to_cpy;
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bio_for_each_segment(bvec, bio, iter) {
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addr = kmap_atomic(bvec.bv_page);
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zones_to_cpy = bvec.bv_len / sizeof(struct blk_zone);
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if (!hdr) {
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hdr = (struct blk_zone_report_hdr *)addr;
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hdr->nr_zones = nr_zones;
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zones_to_cpy--;
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addr += sizeof(struct blk_zone_report_hdr);
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}
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zones_to_cpy = min_t(unsigned int, zones_to_cpy, nr_zones);
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memcpy(addr, &dev->zones[zno],
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zones_to_cpy * sizeof(struct blk_zone));
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kunmap_atomic(addr);
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nr_zones -= zones_to_cpy;
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zno += zones_to_cpy;
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if (!nr_zones)
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break;
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}
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}
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blk_status_t null_zone_report(struct nullb *nullb, struct bio *bio)
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int null_zone_report(struct gendisk *disk, sector_t sector,
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struct blk_zone *zones, unsigned int *nr_zones,
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gfp_t gfp_mask)
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{
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struct nullb *nullb = disk->private_data;
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struct nullb_device *dev = nullb->dev;
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unsigned int zno = null_zone_no(dev, bio->bi_iter.bi_sector);
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unsigned int nr_zones = dev->nr_zones - zno;
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unsigned int max_zones;
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unsigned int zno, nrz = 0;
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max_zones = (bio->bi_iter.bi_size / sizeof(struct blk_zone)) - 1;
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nr_zones = min_t(unsigned int, nr_zones, max_zones);
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null_zone_fill_bio(nullb->dev, bio, zno, nr_zones);
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if (!dev->zoned)
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/* Not a zoned null device */
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return -EOPNOTSUPP;
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return BLK_STS_OK;
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zno = null_zone_no(dev, sector);
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if (zno < dev->nr_zones) {
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nrz = min_t(unsigned int, *nr_zones, dev->nr_zones - zno);
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memcpy(zones, &dev->zones[zno], nrz * sizeof(struct blk_zone));
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}
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*nr_zones = nrz;
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return 0;
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}
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void null_zone_write(struct nullb_cmd *cmd, sector_t sector,
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@ -315,10 +315,6 @@ static int flakey_map(struct dm_target *ti, struct bio *bio)
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if (bio_op(bio) == REQ_OP_ZONE_RESET)
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goto map_bio;
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/* We need to remap reported zones, so remember the BIO iter */
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if (bio_op(bio) == REQ_OP_ZONE_REPORT)
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goto map_bio;
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/* Are we alive ? */
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elapsed = (jiffies - fc->start_time) / HZ;
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if (elapsed % (fc->up_interval + fc->down_interval) >= fc->up_interval) {
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@ -380,11 +376,6 @@ static int flakey_end_io(struct dm_target *ti, struct bio *bio,
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if (bio_op(bio) == REQ_OP_ZONE_RESET)
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return DM_ENDIO_DONE;
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if (bio_op(bio) == REQ_OP_ZONE_REPORT) {
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dm_remap_zone_report(ti, bio, fc->start);
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return DM_ENDIO_DONE;
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}
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if (!*error && pb->bio_submitted && (bio_data_dir(bio) == READ)) {
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if (fc->corrupt_bio_byte && (fc->corrupt_bio_rw == READ) &&
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all_corrupt_bio_flags_match(bio, fc)) {
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@ -457,6 +448,26 @@ static int flakey_prepare_ioctl(struct dm_target *ti, struct block_device **bdev
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return 0;
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}
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#ifdef CONFIG_BLK_DEV_ZONED
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static int flakey_report_zones(struct dm_target *ti, sector_t sector,
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struct blk_zone *zones, unsigned int *nr_zones,
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gfp_t gfp_mask)
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{
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struct flakey_c *fc = ti->private;
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int ret;
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/* Do report and remap it */
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ret = blkdev_report_zones(fc->dev->bdev, flakey_map_sector(ti, sector),
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zones, nr_zones, gfp_mask);
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if (ret != 0)
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return ret;
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if (*nr_zones)
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dm_remap_zone_report(ti, fc->start, zones, nr_zones);
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return 0;
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}
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#endif
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static int flakey_iterate_devices(struct dm_target *ti, iterate_devices_callout_fn fn, void *data)
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{
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struct flakey_c *fc = ti->private;
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@ -469,6 +480,7 @@ static struct target_type flakey_target = {
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.version = {1, 5, 0},
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#ifdef CONFIG_BLK_DEV_ZONED
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.features = DM_TARGET_ZONED_HM,
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.report_zones = flakey_report_zones,
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#endif
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.module = THIS_MODULE,
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.ctr = flakey_ctr,
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@ -102,19 +102,6 @@ static int linear_map(struct dm_target *ti, struct bio *bio)
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return DM_MAPIO_REMAPPED;
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}
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#ifdef CONFIG_BLK_DEV_ZONED
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||||
static int linear_end_io(struct dm_target *ti, struct bio *bio,
|
||||
blk_status_t *error)
|
||||
{
|
||||
struct linear_c *lc = ti->private;
|
||||
|
||||
if (!*error && bio_op(bio) == REQ_OP_ZONE_REPORT)
|
||||
dm_remap_zone_report(ti, bio, lc->start);
|
||||
|
||||
return DM_ENDIO_DONE;
|
||||
}
|
||||
#endif
|
||||
|
||||
static void linear_status(struct dm_target *ti, status_type_t type,
|
||||
unsigned status_flags, char *result, unsigned maxlen)
|
||||
{
|
||||
@ -148,6 +135,26 @@ static int linear_prepare_ioctl(struct dm_target *ti, struct block_device **bdev
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_BLK_DEV_ZONED
|
||||
static int linear_report_zones(struct dm_target *ti, sector_t sector,
|
||||
struct blk_zone *zones, unsigned int *nr_zones,
|
||||
gfp_t gfp_mask)
|
||||
{
|
||||
struct linear_c *lc = (struct linear_c *) ti->private;
|
||||
int ret;
|
||||
|
||||
/* Do report and remap it */
|
||||
ret = blkdev_report_zones(lc->dev->bdev, linear_map_sector(ti, sector),
|
||||
zones, nr_zones, gfp_mask);
|
||||
if (ret != 0)
|
||||
return ret;
|
||||
|
||||
if (*nr_zones)
|
||||
dm_remap_zone_report(ti, lc->start, zones, nr_zones);
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static int linear_iterate_devices(struct dm_target *ti,
|
||||
iterate_devices_callout_fn fn, void *data)
|
||||
{
|
||||
@ -211,8 +218,8 @@ static struct target_type linear_target = {
|
||||
.name = "linear",
|
||||
.version = {1, 4, 0},
|
||||
#ifdef CONFIG_BLK_DEV_ZONED
|
||||
.end_io = linear_end_io,
|
||||
.features = DM_TARGET_PASSES_INTEGRITY | DM_TARGET_ZONED_HM,
|
||||
.report_zones = linear_report_zones,
|
||||
#else
|
||||
.features = DM_TARGET_PASSES_INTEGRITY,
|
||||
#endif
|
||||
|
||||
169
drivers/md/dm.c
169
drivers/md/dm.c
@ -458,6 +458,57 @@ static int dm_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
|
||||
return dm_get_geometry(md, geo);
|
||||
}
|
||||
|
||||
static int dm_blk_report_zones(struct gendisk *disk, sector_t sector,
|
||||
struct blk_zone *zones, unsigned int *nr_zones,
|
||||
gfp_t gfp_mask)
|
||||
{
|
||||
#ifdef CONFIG_BLK_DEV_ZONED
|
||||
struct mapped_device *md = disk->private_data;
|
||||
struct dm_target *tgt;
|
||||
struct dm_table *map;
|
||||
int srcu_idx, ret;
|
||||
|
||||
if (dm_suspended_md(md))
|
||||
return -EAGAIN;
|
||||
|
||||
map = dm_get_live_table(md, &srcu_idx);
|
||||
if (!map)
|
||||
return -EIO;
|
||||
|
||||
tgt = dm_table_find_target(map, sector);
|
||||
if (!dm_target_is_valid(tgt)) {
|
||||
ret = -EIO;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/*
|
||||
* If we are executing this, we already know that the block device
|
||||
* is a zoned device and so each target should have support for that
|
||||
* type of drive. A missing report_zones method means that the target
|
||||
* driver has a problem.
|
||||
*/
|
||||
if (WARN_ON(!tgt->type->report_zones)) {
|
||||
ret = -EIO;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/*
|
||||
* blkdev_report_zones() will loop and call this again to cover all the
|
||||
* zones of the target, eventually moving on to the next target.
|
||||
* So there is no need to loop here trying to fill the entire array
|
||||
* of zones.
|
||||
*/
|
||||
ret = tgt->type->report_zones(tgt, sector, zones,
|
||||
nr_zones, gfp_mask);
|
||||
|
||||
out:
|
||||
dm_put_live_table(md, srcu_idx);
|
||||
return ret;
|
||||
#else
|
||||
return -ENOTSUPP;
|
||||
#endif
|
||||
}
|
||||
|
||||
static int dm_prepare_ioctl(struct mapped_device *md, int *srcu_idx,
|
||||
struct block_device **bdev)
|
||||
__acquires(md->io_barrier)
|
||||
@ -1155,93 +1206,49 @@ void dm_accept_partial_bio(struct bio *bio, unsigned n_sectors)
|
||||
EXPORT_SYMBOL_GPL(dm_accept_partial_bio);
|
||||
|
||||
/*
|
||||
* The zone descriptors obtained with a zone report indicate zone positions
|
||||
* within the target backing device, regardless of that device is a partition
|
||||
* and regardless of the target mapping start sector on the device or partition.
|
||||
* The zone descriptors start sector and write pointer position must be adjusted
|
||||
* to match their relative position within the dm device.
|
||||
* A target may call dm_remap_zone_report() after completion of a
|
||||
* REQ_OP_ZONE_REPORT bio to remap the zone descriptors obtained from the
|
||||
* backing device.
|
||||
* The zone descriptors obtained with a zone report indicate
|
||||
* zone positions within the underlying device of the target. The zone
|
||||
* descriptors must be remapped to match their position within the dm device.
|
||||
* The caller target should obtain the zones information using
|
||||
* blkdev_report_zones() to ensure that remapping for partition offset is
|
||||
* already handled.
|
||||
*/
|
||||
void dm_remap_zone_report(struct dm_target *ti, struct bio *bio, sector_t start)
|
||||
void dm_remap_zone_report(struct dm_target *ti, sector_t start,
|
||||
struct blk_zone *zones, unsigned int *nr_zones)
|
||||
{
|
||||
#ifdef CONFIG_BLK_DEV_ZONED
|
||||
struct dm_target_io *tio = container_of(bio, struct dm_target_io, clone);
|
||||
struct bio *report_bio = tio->io->orig_bio;
|
||||
struct blk_zone_report_hdr *hdr = NULL;
|
||||
struct blk_zone *zone;
|
||||
unsigned int nr_rep = 0;
|
||||
unsigned int ofst;
|
||||
sector_t part_offset;
|
||||
struct bio_vec bvec;
|
||||
struct bvec_iter iter;
|
||||
void *addr;
|
||||
|
||||
if (bio->bi_status)
|
||||
return;
|
||||
unsigned int nrz = *nr_zones;
|
||||
int i;
|
||||
|
||||
/*
|
||||
* bio sector was incremented by the request size on completion. Taking
|
||||
* into account the original request sector, the target start offset on
|
||||
* the backing device and the target mapping offset (ti->begin), the
|
||||
* start sector of the backing device. The partition offset is always 0
|
||||
* if the target uses a whole device.
|
||||
* Remap the start sector and write pointer position of the zones in
|
||||
* the array. Since we may have obtained from the target underlying
|
||||
* device more zones that the target size, also adjust the number
|
||||
* of zones.
|
||||
*/
|
||||
part_offset = bio->bi_iter.bi_sector + ti->begin - (start + bio_end_sector(report_bio));
|
||||
|
||||
/*
|
||||
* Remap the start sector of the reported zones. For sequential zones,
|
||||
* also remap the write pointer position.
|
||||
*/
|
||||
bio_for_each_segment(bvec, report_bio, iter) {
|
||||
addr = kmap_atomic(bvec.bv_page);
|
||||
|
||||
/* Remember the report header in the first page */
|
||||
if (!hdr) {
|
||||
hdr = addr;
|
||||
ofst = sizeof(struct blk_zone_report_hdr);
|
||||
} else
|
||||
ofst = 0;
|
||||
|
||||
/* Set zones start sector */
|
||||
while (hdr->nr_zones && ofst < bvec.bv_len) {
|
||||
zone = addr + ofst;
|
||||
zone->start -= part_offset;
|
||||
if (zone->start >= start + ti->len) {
|
||||
hdr->nr_zones = 0;
|
||||
break;
|
||||
}
|
||||
zone->start = zone->start + ti->begin - start;
|
||||
if (zone->type != BLK_ZONE_TYPE_CONVENTIONAL) {
|
||||
if (zone->cond == BLK_ZONE_COND_FULL)
|
||||
zone->wp = zone->start + zone->len;
|
||||
else if (zone->cond == BLK_ZONE_COND_EMPTY)
|
||||
zone->wp = zone->start;
|
||||
else
|
||||
zone->wp = zone->wp + ti->begin - start - part_offset;
|
||||
}
|
||||
ofst += sizeof(struct blk_zone);
|
||||
hdr->nr_zones--;
|
||||
nr_rep++;
|
||||
for (i = 0; i < nrz; i++) {
|
||||
zone = zones + i;
|
||||
if (zone->start >= start + ti->len) {
|
||||
memset(zone, 0, sizeof(struct blk_zone) * (nrz - i));
|
||||
break;
|
||||
}
|
||||
|
||||
if (addr != hdr)
|
||||
kunmap_atomic(addr);
|
||||
zone->start = zone->start + ti->begin - start;
|
||||
if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
|
||||
continue;
|
||||
|
||||
if (!hdr->nr_zones)
|
||||
break;
|
||||
if (zone->cond == BLK_ZONE_COND_FULL)
|
||||
zone->wp = zone->start + zone->len;
|
||||
else if (zone->cond == BLK_ZONE_COND_EMPTY)
|
||||
zone->wp = zone->start;
|
||||
else
|
||||
zone->wp = zone->wp + ti->begin - start;
|
||||
}
|
||||
|
||||
if (hdr) {
|
||||
hdr->nr_zones = nr_rep;
|
||||
kunmap_atomic(hdr);
|
||||
}
|
||||
|
||||
bio_advance(report_bio, report_bio->bi_iter.bi_size);
|
||||
|
||||
*nr_zones = i;
|
||||
#else /* !CONFIG_BLK_DEV_ZONED */
|
||||
bio->bi_status = BLK_STS_NOTSUPP;
|
||||
*nr_zones = 0;
|
||||
#endif
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dm_remap_zone_report);
|
||||
@ -1327,8 +1334,7 @@ static int clone_bio(struct dm_target_io *tio, struct bio *bio,
|
||||
return r;
|
||||
}
|
||||
|
||||
if (bio_op(bio) != REQ_OP_ZONE_REPORT)
|
||||
bio_advance(clone, to_bytes(sector - clone->bi_iter.bi_sector));
|
||||
bio_advance(clone, to_bytes(sector - clone->bi_iter.bi_sector));
|
||||
clone->bi_iter.bi_size = to_bytes(len);
|
||||
|
||||
if (unlikely(bio_integrity(bio) != NULL))
|
||||
@ -1541,7 +1547,6 @@ static bool __process_abnormal_io(struct clone_info *ci, struct dm_target *ti,
|
||||
*/
|
||||
static int __split_and_process_non_flush(struct clone_info *ci)
|
||||
{
|
||||
struct bio *bio = ci->bio;
|
||||
struct dm_target *ti;
|
||||
unsigned len;
|
||||
int r;
|
||||
@ -1553,11 +1558,7 @@ static int __split_and_process_non_flush(struct clone_info *ci)
|
||||
if (unlikely(__process_abnormal_io(ci, ti, &r)))
|
||||
return r;
|
||||
|
||||
if (bio_op(bio) == REQ_OP_ZONE_REPORT)
|
||||
len = ci->sector_count;
|
||||
else
|
||||
len = min_t(sector_t, max_io_len(ci->sector, ti),
|
||||
ci->sector_count);
|
||||
len = min_t(sector_t, max_io_len(ci->sector, ti), ci->sector_count);
|
||||
|
||||
r = __clone_and_map_data_bio(ci, ti, ci->sector, &len);
|
||||
if (r < 0)
|
||||
@ -1616,9 +1617,6 @@ static blk_qc_t __split_and_process_bio(struct mapped_device *md,
|
||||
* We take a clone of the original to store in
|
||||
* ci.io->orig_bio to be used by end_io_acct() and
|
||||
* for dec_pending to use for completion handling.
|
||||
* As this path is not used for REQ_OP_ZONE_REPORT,
|
||||
* the usage of io->orig_bio in dm_remap_zone_report()
|
||||
* won't be affected by this reassignment.
|
||||
*/
|
||||
struct bio *b = bio_split(bio, bio_sectors(bio) - ci.sector_count,
|
||||
GFP_NOIO, &md->queue->bio_split);
|
||||
@ -3167,6 +3165,7 @@ static const struct block_device_operations dm_blk_dops = {
|
||||
.release = dm_blk_close,
|
||||
.ioctl = dm_blk_ioctl,
|
||||
.getgeo = dm_blk_getgeo,
|
||||
.report_zones = dm_blk_report_zones,
|
||||
.pr_ops = &dm_pr_ops,
|
||||
.owner = THIS_MODULE
|
||||
};
|
||||
|
||||
@ -1272,8 +1272,6 @@ static int sd_init_command(struct scsi_cmnd *cmd)
|
||||
case REQ_OP_READ:
|
||||
case REQ_OP_WRITE:
|
||||
return sd_setup_read_write_cmnd(cmd);
|
||||
case REQ_OP_ZONE_REPORT:
|
||||
return sd_zbc_setup_report_cmnd(cmd);
|
||||
case REQ_OP_ZONE_RESET:
|
||||
return sd_zbc_setup_reset_cmnd(cmd);
|
||||
default:
|
||||
@ -1802,6 +1800,7 @@ static const struct block_device_operations sd_fops = {
|
||||
.check_events = sd_check_events,
|
||||
.revalidate_disk = sd_revalidate_disk,
|
||||
.unlock_native_capacity = sd_unlock_native_capacity,
|
||||
.report_zones = sd_zbc_report_zones,
|
||||
.pr_ops = &sd_pr_ops,
|
||||
};
|
||||
|
||||
@ -1953,16 +1952,6 @@ static int sd_done(struct scsi_cmnd *SCpnt)
|
||||
scsi_set_resid(SCpnt, blk_rq_bytes(req));
|
||||
}
|
||||
break;
|
||||
case REQ_OP_ZONE_REPORT:
|
||||
if (!result) {
|
||||
good_bytes = scsi_bufflen(SCpnt)
|
||||
- scsi_get_resid(SCpnt);
|
||||
scsi_set_resid(SCpnt, 0);
|
||||
} else {
|
||||
good_bytes = 0;
|
||||
scsi_set_resid(SCpnt, blk_rq_bytes(req));
|
||||
}
|
||||
break;
|
||||
default:
|
||||
/*
|
||||
* In case of bogus fw or device, we could end up having
|
||||
|
||||
@ -273,10 +273,12 @@ static inline int sd_is_zoned(struct scsi_disk *sdkp)
|
||||
extern int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buffer);
|
||||
extern void sd_zbc_remove(struct scsi_disk *sdkp);
|
||||
extern void sd_zbc_print_zones(struct scsi_disk *sdkp);
|
||||
extern int sd_zbc_setup_report_cmnd(struct scsi_cmnd *cmd);
|
||||
extern int sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd);
|
||||
extern void sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes,
|
||||
struct scsi_sense_hdr *sshdr);
|
||||
extern int sd_zbc_report_zones(struct gendisk *disk, sector_t sector,
|
||||
struct blk_zone *zones, unsigned int *nr_zones,
|
||||
gfp_t gfp_mask);
|
||||
|
||||
#else /* CONFIG_BLK_DEV_ZONED */
|
||||
|
||||
@ -290,11 +292,6 @@ static inline void sd_zbc_remove(struct scsi_disk *sdkp) {}
|
||||
|
||||
static inline void sd_zbc_print_zones(struct scsi_disk *sdkp) {}
|
||||
|
||||
static inline int sd_zbc_setup_report_cmnd(struct scsi_cmnd *cmd)
|
||||
{
|
||||
return BLKPREP_INVALID;
|
||||
}
|
||||
|
||||
static inline int sd_zbc_setup_reset_cmnd(struct scsi_cmnd *cmd)
|
||||
{
|
||||
return BLKPREP_INVALID;
|
||||
@ -304,6 +301,8 @@ static inline void sd_zbc_complete(struct scsi_cmnd *cmd,
|
||||
unsigned int good_bytes,
|
||||
struct scsi_sense_hdr *sshdr) {}
|
||||
|
||||
#define sd_zbc_report_zones NULL
|
||||
|
||||
#endif /* CONFIG_BLK_DEV_ZONED */
|
||||
|
||||
#endif /* _SCSI_DISK_H */
|
||||
|
||||
@ -62,7 +62,7 @@ static void sd_zbc_parse_report(struct scsi_disk *sdkp, u8 *buf,
|
||||
}
|
||||
|
||||
/**
|
||||
* sd_zbc_report_zones - Issue a REPORT ZONES scsi command.
|
||||
* sd_zbc_do_report_zones - Issue a REPORT ZONES scsi command.
|
||||
* @sdkp: The target disk
|
||||
* @buf: Buffer to use for the reply
|
||||
* @buflen: the buffer size
|
||||
@ -75,9 +75,9 @@ static void sd_zbc_parse_report(struct scsi_disk *sdkp, u8 *buf,
|
||||
* zones and will only report the count of zones fitting in the command reply
|
||||
* buffer.
|
||||
*/
|
||||
static int sd_zbc_report_zones(struct scsi_disk *sdkp, unsigned char *buf,
|
||||
unsigned int buflen, sector_t lba,
|
||||
bool partial)
|
||||
static int sd_zbc_do_report_zones(struct scsi_disk *sdkp, unsigned char *buf,
|
||||
unsigned int buflen, sector_t lba,
|
||||
bool partial)
|
||||
{
|
||||
struct scsi_device *sdp = sdkp->device;
|
||||
const int timeout = sdp->request_queue->rq_timeout;
|
||||
@ -118,108 +118,56 @@ static int sd_zbc_report_zones(struct scsi_disk *sdkp, unsigned char *buf,
|
||||
}
|
||||
|
||||
/**
|
||||
* sd_zbc_setup_report_cmnd - Prepare a REPORT ZONES scsi command
|
||||
* @cmd: The command to setup
|
||||
* sd_zbc_report_zones - Disk report zones operation.
|
||||
* @disk: The target disk
|
||||
* @sector: Start 512B sector of the report
|
||||
* @zones: Array of zone descriptors
|
||||
* @nr_zones: Number of descriptors in the array
|
||||
* @gfp_mask: Memory allocation mask
|
||||
*
|
||||
* Call in sd_init_command() for a REQ_OP_ZONE_REPORT request.
|
||||
* Execute a report zones command on the target disk.
|
||||
*/
|
||||
int sd_zbc_setup_report_cmnd(struct scsi_cmnd *cmd)
|
||||
int sd_zbc_report_zones(struct gendisk *disk, sector_t sector,
|
||||
struct blk_zone *zones, unsigned int *nr_zones,
|
||||
gfp_t gfp_mask)
|
||||
{
|
||||
struct request *rq = cmd->request;
|
||||
struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
|
||||
sector_t lba, sector = blk_rq_pos(rq);
|
||||
unsigned int nr_bytes = blk_rq_bytes(rq);
|
||||
int ret;
|
||||
|
||||
WARN_ON(nr_bytes == 0);
|
||||
struct scsi_disk *sdkp = scsi_disk(disk);
|
||||
unsigned int i, buflen, nrz = *nr_zones;
|
||||
unsigned char *buf;
|
||||
size_t offset = 0;
|
||||
int ret = 0;
|
||||
|
||||
if (!sd_is_zoned(sdkp))
|
||||
/* Not a zoned device */
|
||||
return BLKPREP_KILL;
|
||||
return -EOPNOTSUPP;
|
||||
|
||||
ret = scsi_init_io(cmd);
|
||||
if (ret != BLKPREP_OK)
|
||||
return ret;
|
||||
/*
|
||||
* Get a reply buffer for the number of requested zones plus a header.
|
||||
* For ATA, buffers must be aligned to 512B.
|
||||
*/
|
||||
buflen = roundup((nrz + 1) * 64, 512);
|
||||
buf = kmalloc(buflen, gfp_mask);
|
||||
if (!buf)
|
||||
return -ENOMEM;
|
||||
|
||||
cmd->cmd_len = 16;
|
||||
memset(cmd->cmnd, 0, cmd->cmd_len);
|
||||
cmd->cmnd[0] = ZBC_IN;
|
||||
cmd->cmnd[1] = ZI_REPORT_ZONES;
|
||||
lba = sectors_to_logical(sdkp->device, sector);
|
||||
put_unaligned_be64(lba, &cmd->cmnd[2]);
|
||||
put_unaligned_be32(nr_bytes, &cmd->cmnd[10]);
|
||||
/* Do partial report for speeding things up */
|
||||
cmd->cmnd[14] = ZBC_REPORT_ZONE_PARTIAL;
|
||||
|
||||
cmd->sc_data_direction = DMA_FROM_DEVICE;
|
||||
cmd->sdb.length = nr_bytes;
|
||||
cmd->transfersize = sdkp->device->sector_size;
|
||||
cmd->allowed = 0;
|
||||
|
||||
return BLKPREP_OK;
|
||||
}
|
||||
|
||||
/**
|
||||
* sd_zbc_report_zones_complete - Process a REPORT ZONES scsi command reply.
|
||||
* @scmd: The completed report zones command
|
||||
* @good_bytes: reply size in bytes
|
||||
*
|
||||
* Convert all reported zone descriptors to struct blk_zone. The conversion
|
||||
* is done in-place, directly in the request specified sg buffer.
|
||||
*/
|
||||
static void sd_zbc_report_zones_complete(struct scsi_cmnd *scmd,
|
||||
unsigned int good_bytes)
|
||||
{
|
||||
struct request *rq = scmd->request;
|
||||
struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
|
||||
struct sg_mapping_iter miter;
|
||||
struct blk_zone_report_hdr hdr;
|
||||
struct blk_zone zone;
|
||||
unsigned int offset, bytes = 0;
|
||||
unsigned long flags;
|
||||
u8 *buf;
|
||||
|
||||
if (good_bytes < 64)
|
||||
return;
|
||||
|
||||
memset(&hdr, 0, sizeof(struct blk_zone_report_hdr));
|
||||
|
||||
sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd),
|
||||
SG_MITER_TO_SG | SG_MITER_ATOMIC);
|
||||
|
||||
local_irq_save(flags);
|
||||
while (sg_miter_next(&miter) && bytes < good_bytes) {
|
||||
|
||||
buf = miter.addr;
|
||||
offset = 0;
|
||||
|
||||
if (bytes == 0) {
|
||||
/* Set the report header */
|
||||
hdr.nr_zones = min_t(unsigned int,
|
||||
(good_bytes - 64) / 64,
|
||||
get_unaligned_be32(&buf[0]) / 64);
|
||||
memcpy(buf, &hdr, sizeof(struct blk_zone_report_hdr));
|
||||
offset += 64;
|
||||
bytes += 64;
|
||||
}
|
||||
|
||||
/* Parse zone descriptors */
|
||||
while (offset < miter.length && hdr.nr_zones) {
|
||||
WARN_ON(offset > miter.length);
|
||||
buf = miter.addr + offset;
|
||||
sd_zbc_parse_report(sdkp, buf, &zone);
|
||||
memcpy(buf, &zone, sizeof(struct blk_zone));
|
||||
offset += 64;
|
||||
bytes += 64;
|
||||
hdr.nr_zones--;
|
||||
}
|
||||
|
||||
if (!hdr.nr_zones)
|
||||
break;
|
||||
ret = sd_zbc_do_report_zones(sdkp, buf, buflen,
|
||||
sectors_to_logical(sdkp->device, sector), true);
|
||||
if (ret)
|
||||
goto out_free_buf;
|
||||
|
||||
nrz = min(nrz, get_unaligned_be32(&buf[0]) / 64);
|
||||
for (i = 0; i < nrz; i++) {
|
||||
offset += 64;
|
||||
sd_zbc_parse_report(sdkp, buf + offset, zones);
|
||||
zones++;
|
||||
}
|
||||
sg_miter_stop(&miter);
|
||||
local_irq_restore(flags);
|
||||
|
||||
*nr_zones = nrz;
|
||||
|
||||
out_free_buf:
|
||||
kfree(buf);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
@ -302,13 +250,6 @@ void sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes,
|
||||
case REQ_OP_WRITE_ZEROES:
|
||||
case REQ_OP_WRITE_SAME:
|
||||
break;
|
||||
|
||||
case REQ_OP_ZONE_REPORT:
|
||||
|
||||
if (!result)
|
||||
sd_zbc_report_zones_complete(cmd, good_bytes);
|
||||
break;
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
@ -390,7 +331,7 @@ static int sd_zbc_check_zones(struct scsi_disk *sdkp, u32 *zblocks)
|
||||
return -ENOMEM;
|
||||
|
||||
/* Do a report zone to get max_lba and the same field */
|
||||
ret = sd_zbc_report_zones(sdkp, buf, SD_ZBC_BUF_SIZE, 0, false);
|
||||
ret = sd_zbc_do_report_zones(sdkp, buf, SD_ZBC_BUF_SIZE, 0, false);
|
||||
if (ret)
|
||||
goto out_free;
|
||||
|
||||
@ -447,8 +388,8 @@ static int sd_zbc_check_zones(struct scsi_disk *sdkp, u32 *zblocks)
|
||||
}
|
||||
|
||||
if (block < sdkp->capacity) {
|
||||
ret = sd_zbc_report_zones(sdkp, buf,
|
||||
SD_ZBC_BUF_SIZE, block, true);
|
||||
ret = sd_zbc_do_report_zones(sdkp, buf, SD_ZBC_BUF_SIZE,
|
||||
block, true);
|
||||
if (ret)
|
||||
goto out_free;
|
||||
}
|
||||
@ -565,8 +506,8 @@ sd_zbc_setup_seq_zones_bitmap(struct scsi_disk *sdkp, u32 zone_shift,
|
||||
goto out;
|
||||
|
||||
while (lba < sdkp->capacity) {
|
||||
ret = sd_zbc_report_zones(sdkp, buf, SD_ZBC_BUF_SIZE,
|
||||
lba, true);
|
||||
ret = sd_zbc_do_report_zones(sdkp, buf, SD_ZBC_BUF_SIZE, lba,
|
||||
true);
|
||||
if (ret)
|
||||
goto out;
|
||||
lba = sd_zbc_get_seq_zones(sdkp, buf, SD_ZBC_BUF_SIZE,
|
||||
|
||||
@ -283,8 +283,6 @@ enum req_opf {
|
||||
REQ_OP_FLUSH = 2,
|
||||
/* discard sectors */
|
||||
REQ_OP_DISCARD = 3,
|
||||
/* get zone information */
|
||||
REQ_OP_ZONE_REPORT = 4,
|
||||
/* securely erase sectors */
|
||||
REQ_OP_SECURE_ERASE = 5,
|
||||
/* seset a zone write pointer */
|
||||
|
||||
@ -396,11 +396,6 @@ struct queue_limits {
|
||||
|
||||
#ifdef CONFIG_BLK_DEV_ZONED
|
||||
|
||||
struct blk_zone_report_hdr {
|
||||
unsigned int nr_zones;
|
||||
u8 padding[60];
|
||||
};
|
||||
|
||||
extern unsigned int blkdev_nr_zones(struct block_device *bdev);
|
||||
extern int blkdev_report_zones(struct block_device *bdev,
|
||||
sector_t sector, struct blk_zone *zones,
|
||||
@ -1867,6 +1862,9 @@ struct block_device_operations {
|
||||
int (*getgeo)(struct block_device *, struct hd_geometry *);
|
||||
/* this callback is with swap_lock and sometimes page table lock held */
|
||||
void (*swap_slot_free_notify) (struct block_device *, unsigned long);
|
||||
int (*report_zones)(struct gendisk *, sector_t sector,
|
||||
struct blk_zone *zones, unsigned int *nr_zones,
|
||||
gfp_t gfp_mask);
|
||||
struct module *owner;
|
||||
const struct pr_ops *pr_ops;
|
||||
};
|
||||
|
||||
@ -92,6 +92,11 @@ typedef int (*dm_message_fn) (struct dm_target *ti, unsigned argc, char **argv,
|
||||
|
||||
typedef int (*dm_prepare_ioctl_fn) (struct dm_target *ti, struct block_device **bdev);
|
||||
|
||||
typedef int (*dm_report_zones_fn) (struct dm_target *ti, sector_t sector,
|
||||
struct blk_zone *zones,
|
||||
unsigned int *nr_zones,
|
||||
gfp_t gfp_mask);
|
||||
|
||||
/*
|
||||
* These iteration functions are typically used to check (and combine)
|
||||
* properties of underlying devices.
|
||||
@ -180,6 +185,9 @@ struct target_type {
|
||||
dm_status_fn status;
|
||||
dm_message_fn message;
|
||||
dm_prepare_ioctl_fn prepare_ioctl;
|
||||
#ifdef CONFIG_BLK_DEV_ZONED
|
||||
dm_report_zones_fn report_zones;
|
||||
#endif
|
||||
dm_busy_fn busy;
|
||||
dm_iterate_devices_fn iterate_devices;
|
||||
dm_io_hints_fn io_hints;
|
||||
@ -420,8 +428,8 @@ struct gendisk *dm_disk(struct mapped_device *md);
|
||||
int dm_suspended(struct dm_target *ti);
|
||||
int dm_noflush_suspending(struct dm_target *ti);
|
||||
void dm_accept_partial_bio(struct bio *bio, unsigned n_sectors);
|
||||
void dm_remap_zone_report(struct dm_target *ti, struct bio *bio,
|
||||
sector_t start);
|
||||
void dm_remap_zone_report(struct dm_target *ti, sector_t start,
|
||||
struct blk_zone *zones, unsigned int *nr_zones);
|
||||
union map_info *dm_get_rq_mapinfo(struct request *rq);
|
||||
|
||||
struct queue_limits *dm_get_queue_limits(struct mapped_device *md);
|
||||
|
||||
@ -82,7 +82,6 @@ TRACE_DEFINE_ENUM(CP_TRIMMED);
|
||||
{ REQ_OP_WRITE, "WRITE" }, \
|
||||
{ REQ_OP_FLUSH, "FLUSH" }, \
|
||||
{ REQ_OP_DISCARD, "DISCARD" }, \
|
||||
{ REQ_OP_ZONE_REPORT, "ZONE_REPORT" }, \
|
||||
{ REQ_OP_SECURE_ERASE, "SECURE_ERASE" }, \
|
||||
{ REQ_OP_ZONE_RESET, "ZONE_RESET" }, \
|
||||
{ REQ_OP_WRITE_SAME, "WRITE_SAME" }, \
|
||||
|
||||
Loading…
Reference in New Issue
Block a user