diff options
author | Christoph Hellwig <hch@lst.de> | 2019-11-11 11:39:30 +0900 |
---|---|---|
committer | Jens Axboe <axboe@kernel.dk> | 2019-11-12 19:12:07 -0700 |
commit | d41003513e61dd9d4974cb441d30b63650b85654 (patch) | |
tree | c55164e7ccf02f6e7e936757ed178b06109fcca2 /drivers | |
parent | 23a50861adda26a3f3b3ec5fbca0583133d89538 (diff) | |
download | linux-d41003513e61dd9d4974cb441d30b63650b85654.tar.gz linux-d41003513e61dd9d4974cb441d30b63650b85654.tar.bz2 linux-d41003513e61dd9d4974cb441d30b63650b85654.zip |
block: rework zone reporting
Avoid the need to allocate a potentially large array of struct blk_zone
in the block layer by switching the ->report_zones method interface to
a callback model. Now the caller simply supplies a callback that is
executed on each reported zone, and private data for it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/block/null_blk.h | 2 | ||||
-rw-r--r-- | drivers/block/null_blk_zoned.c | 31 | ||||
-rw-r--r-- | drivers/md/dm-flakey.c | 18 | ||||
-rw-r--r-- | drivers/md/dm-linear.c | 20 | ||||
-rw-r--r-- | drivers/md/dm-zoned-metadata.c | 131 | ||||
-rw-r--r-- | drivers/md/dm.c | 121 | ||||
-rw-r--r-- | drivers/scsi/sd.h | 4 | ||||
-rw-r--r-- | drivers/scsi/sd_zbc.c | 106 |
8 files changed, 190 insertions, 243 deletions
diff --git a/drivers/block/null_blk.h b/drivers/block/null_blk.h index 9bf56fbab091..bc837862b767 100644 --- a/drivers/block/null_blk.h +++ b/drivers/block/null_blk.h @@ -92,7 +92,7 @@ struct nullb { int null_zone_init(struct nullb_device *dev); void null_zone_exit(struct nullb_device *dev); int null_report_zones(struct gendisk *disk, sector_t sector, - struct blk_zone *zones, unsigned int *nr_zones); + unsigned int nr_zones, report_zones_cb cb, void *data); blk_status_t null_handle_zoned(struct nullb_cmd *cmd, enum req_opf op, sector_t sector, sector_t nr_sectors); diff --git a/drivers/block/null_blk_zoned.c b/drivers/block/null_blk_zoned.c index 00696f16664b..d4d88b581822 100644 --- a/drivers/block/null_blk_zoned.c +++ b/drivers/block/null_blk_zoned.c @@ -67,21 +67,34 @@ void null_zone_exit(struct nullb_device *dev) } int null_report_zones(struct gendisk *disk, sector_t sector, - struct blk_zone *zones, unsigned int *nr_zones) + unsigned int nr_zones, report_zones_cb cb, void *data) { struct nullb *nullb = disk->private_data; struct nullb_device *dev = nullb->dev; - unsigned int zno, nrz = 0; + unsigned int first_zone, i; + struct blk_zone zone; + int error; - zno = null_zone_no(dev, sector); - if (zno < dev->nr_zones) { - nrz = min_t(unsigned int, *nr_zones, dev->nr_zones - zno); - memcpy(zones, &dev->zones[zno], nrz * sizeof(struct blk_zone)); - } + first_zone = null_zone_no(dev, sector); + if (first_zone >= dev->nr_zones) + return 0; - *nr_zones = nrz; + nr_zones = min(nr_zones, dev->nr_zones - first_zone); + for (i = 0; i < nr_zones; i++) { + /* + * Stacked DM target drivers will remap the zone information by + * modifying the zone information passed to the report callback. + * So use a local copy to avoid corruption of the device zone + * array. + */ + memcpy(&zone, &dev->zones[first_zone + i], + sizeof(struct blk_zone)); + error = cb(&zone, i, data); + if (error) + return error; + } - return 0; + return nr_zones; } size_t null_zone_valid_read_len(struct nullb *nullb, diff --git a/drivers/md/dm-flakey.c b/drivers/md/dm-flakey.c index 76587e9af0ef..a2cc9e45cbba 100644 --- a/drivers/md/dm-flakey.c +++ b/drivers/md/dm-flakey.c @@ -459,21 +459,15 @@ static int flakey_prepare_ioctl(struct dm_target *ti, struct block_device **bdev } #ifdef CONFIG_BLK_DEV_ZONED -static int flakey_report_zones(struct dm_target *ti, sector_t sector, - struct blk_zone *zones, unsigned int *nr_zones) +static int flakey_report_zones(struct dm_target *ti, + struct dm_report_zones_args *args, unsigned int nr_zones) { struct flakey_c *fc = ti->private; - int ret; + sector_t sector = flakey_map_sector(ti, args->next_sector); - /* Do report and remap it */ - ret = blkdev_report_zones(fc->dev->bdev, flakey_map_sector(ti, sector), - zones, nr_zones); - if (ret != 0) - return ret; - - if (*nr_zones) - dm_remap_zone_report(ti, fc->start, zones, nr_zones); - return 0; + args->start = fc->start; + return blkdev_report_zones(fc->dev->bdev, sector, nr_zones, + dm_report_zones_cb, args); } #endif diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c index 97acafd48c85..8d07fdf63a47 100644 --- a/drivers/md/dm-linear.c +++ b/drivers/md/dm-linear.c @@ -136,21 +136,15 @@ static int linear_prepare_ioctl(struct dm_target *ti, struct block_device **bdev } #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) +static int linear_report_zones(struct dm_target *ti, + struct dm_report_zones_args *args, unsigned int nr_zones) { - 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); - if (ret != 0) - return ret; + struct linear_c *lc = ti->private; + sector_t sector = linear_map_sector(ti, args->next_sector); - if (*nr_zones) - dm_remap_zone_report(ti, lc->start, zones, nr_zones); - return 0; + args->start = lc->start; + return blkdev_report_zones(lc->dev->bdev, sector, nr_zones, + dm_report_zones_cb, args); } #endif diff --git a/drivers/md/dm-zoned-metadata.c b/drivers/md/dm-zoned-metadata.c index feb4718ce6a6..069e4675da6b 100644 --- a/drivers/md/dm-zoned-metadata.c +++ b/drivers/md/dm-zoned-metadata.c @@ -1080,9 +1080,10 @@ static int dmz_load_sb(struct dmz_metadata *zmd) /* * Initialize a zone descriptor. */ -static int dmz_init_zone(struct dmz_metadata *zmd, struct dm_zone *zone, - struct blk_zone *blkz) +static int dmz_init_zone(struct blk_zone *blkz, unsigned int idx, void *data) { + struct dmz_metadata *zmd = data; + struct dm_zone *zone = &zmd->zones[idx]; struct dmz_dev *dev = zmd->dev; /* Ignore the eventual last runt (smaller) zone */ @@ -1096,26 +1097,29 @@ static int dmz_init_zone(struct dmz_metadata *zmd, struct dm_zone *zone, atomic_set(&zone->refcount, 0); zone->chunk = DMZ_MAP_UNMAPPED; - if (blkz->type == BLK_ZONE_TYPE_CONVENTIONAL) { + switch (blkz->type) { + case BLK_ZONE_TYPE_CONVENTIONAL: set_bit(DMZ_RND, &zone->flags); zmd->nr_rnd_zones++; - } else if (blkz->type == BLK_ZONE_TYPE_SEQWRITE_REQ || - blkz->type == BLK_ZONE_TYPE_SEQWRITE_PREF) { + break; + case BLK_ZONE_TYPE_SEQWRITE_REQ: + case BLK_ZONE_TYPE_SEQWRITE_PREF: set_bit(DMZ_SEQ, &zone->flags); - } else + break; + default: return -ENXIO; - - if (blkz->cond == BLK_ZONE_COND_OFFLINE) - set_bit(DMZ_OFFLINE, &zone->flags); - else if (blkz->cond == BLK_ZONE_COND_READONLY) - set_bit(DMZ_READ_ONLY, &zone->flags); + } if (dmz_is_rnd(zone)) zone->wp_block = 0; else zone->wp_block = dmz_sect2blk(blkz->wp - blkz->start); - if (!dmz_is_offline(zone) && !dmz_is_readonly(zone)) { + if (blkz->cond == BLK_ZONE_COND_OFFLINE) + set_bit(DMZ_OFFLINE, &zone->flags); + else if (blkz->cond == BLK_ZONE_COND_READONLY) + set_bit(DMZ_READ_ONLY, &zone->flags); + else { zmd->nr_useable_zones++; if (dmz_is_rnd(zone)) { zmd->nr_rnd_zones++; @@ -1139,23 +1143,13 @@ static void dmz_drop_zones(struct dmz_metadata *zmd) } /* - * The size of a zone report in number of zones. - * This results in 4096*64B=256KB report zones commands. - */ -#define DMZ_REPORT_NR_ZONES 4096 - -/* * Allocate and initialize zone descriptors using the zone * information from disk. */ static int dmz_init_zones(struct dmz_metadata *zmd) { struct dmz_dev *dev = zmd->dev; - struct dm_zone *zone; - struct blk_zone *blkz; - unsigned int nr_blkz; - sector_t sector = 0; - int i, ret = 0; + int ret; /* Init */ zmd->zone_bitmap_size = dev->zone_nr_blocks >> 3; @@ -1169,54 +1163,38 @@ static int dmz_init_zones(struct dmz_metadata *zmd) dmz_dev_info(dev, "Using %zu B for zone information", sizeof(struct dm_zone) * dev->nr_zones); - /* Get zone information */ - nr_blkz = DMZ_REPORT_NR_ZONES; - blkz = kcalloc(nr_blkz, sizeof(struct blk_zone), GFP_KERNEL); - if (!blkz) { - ret = -ENOMEM; - goto out; - } - /* - * Get zone information and initialize zone descriptors. - * At the same time, determine where the super block - * should be: first block of the first randomly writable - * zone. + * Get zone information and initialize zone descriptors. At the same + * time, determine where the super block should be: first block of the + * first randomly writable zone. */ - zone = zmd->zones; - while (sector < dev->capacity) { - /* Get zone information */ - nr_blkz = DMZ_REPORT_NR_ZONES; - ret = blkdev_report_zones(dev->bdev, sector, blkz, &nr_blkz); - if (ret) { - dmz_dev_err(dev, "Report zones failed %d", ret); - goto out; - } + ret = blkdev_report_zones(dev->bdev, 0, BLK_ALL_ZONES, dmz_init_zone, + zmd); + if (ret < 0) { + dmz_drop_zones(zmd); + return ret; + } - if (!nr_blkz) - break; + return 0; +} - /* Process report */ - for (i = 0; i < nr_blkz; i++) { - ret = dmz_init_zone(zmd, zone, &blkz[i]); - if (ret) - goto out; - sector += dev->zone_nr_sectors; - zone++; - } - } +static int dmz_update_zone_cb(struct blk_zone *blkz, unsigned int idx, + void *data) +{ + struct dm_zone *zone = data; - /* The entire zone configuration of the disk should now be known */ - if (sector < dev->capacity) { - dmz_dev_err(dev, "Failed to get correct zone information"); - ret = -ENXIO; - } -out: - kfree(blkz); - if (ret) - dmz_drop_zones(zmd); + clear_bit(DMZ_OFFLINE, &zone->flags); + clear_bit(DMZ_READ_ONLY, &zone->flags); + if (blkz->cond == BLK_ZONE_COND_OFFLINE) + set_bit(DMZ_OFFLINE, &zone->flags); + else if (blkz->cond == BLK_ZONE_COND_READONLY) + set_bit(DMZ_READ_ONLY, &zone->flags); - return ret; + if (dmz_is_seq(zone)) + zone->wp_block = dmz_sect2blk(blkz->wp - blkz->start); + else + zone->wp_block = 0; + return 0; } /* @@ -1224,9 +1202,7 @@ out: */ static int dmz_update_zone(struct dmz_metadata *zmd, struct dm_zone *zone) { - unsigned int nr_blkz = 1; unsigned int noio_flag; - struct blk_zone blkz; int ret; /* @@ -1236,29 +1212,18 @@ static int dmz_update_zone(struct dmz_metadata *zmd, struct dm_zone *zone) * GFP_NOIO was specified. */ noio_flag = memalloc_noio_save(); - ret = blkdev_report_zones(zmd->dev->bdev, dmz_start_sect(zmd, zone), - &blkz, &nr_blkz); + ret = blkdev_report_zones(zmd->dev->bdev, dmz_start_sect(zmd, zone), 1, + dmz_update_zone_cb, zone); memalloc_noio_restore(noio_flag); - if (!nr_blkz) + + if (ret == 0) ret = -EIO; - if (ret) { + if (ret < 0) { dmz_dev_err(zmd->dev, "Get zone %u report failed", dmz_id(zmd, zone)); return ret; } - clear_bit(DMZ_OFFLINE, &zone->flags); - clear_bit(DMZ_READ_ONLY, &zone->flags); - if (blkz.cond == BLK_ZONE_COND_OFFLINE) - set_bit(DMZ_OFFLINE, &zone->flags); - else if (blkz.cond == BLK_ZONE_COND_READONLY) - set_bit(DMZ_READ_ONLY, &zone->flags); - - if (dmz_is_seq(zone)) - zone->wp_block = dmz_sect2blk(blkz.wp - blkz.start); - else - zone->wp_block = 0; - return 0; } diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 76f4cfdd6b41..e8f9661a10a1 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -440,14 +440,48 @@ static int dm_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo) return dm_get_geometry(md, geo); } +#ifdef CONFIG_BLK_DEV_ZONED +int dm_report_zones_cb(struct blk_zone *zone, unsigned int idx, void *data) +{ + struct dm_report_zones_args *args = data; + sector_t sector_diff = args->tgt->begin - args->start; + + /* + * Ignore zones beyond the target range. + */ + if (zone->start >= args->start + args->tgt->len) + return 0; + + /* + * Remap the start sector and write pointer position of the zone + * to match its position in the target range. + */ + zone->start += sector_diff; + 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 += sector_diff; + } + + args->next_sector = zone->start + zone->len; + return args->orig_cb(zone, args->zone_idx++, args->orig_data); +} +EXPORT_SYMBOL_GPL(dm_report_zones_cb); + static int dm_blk_report_zones(struct gendisk *disk, sector_t sector, - struct blk_zone *zones, unsigned int *nr_zones) + unsigned int nr_zones, report_zones_cb cb, void *data) { -#ifdef CONFIG_BLK_DEV_ZONED struct mapped_device *md = disk->private_data; - struct dm_target *tgt; struct dm_table *map; int srcu_idx, ret; + struct dm_report_zones_args args = { + .next_sector = sector, + .orig_data = data, + .orig_cb = cb, + }; if (dm_suspended_md(md)) return -EAGAIN; @@ -456,32 +490,30 @@ static int dm_blk_report_zones(struct gendisk *disk, sector_t sector, if (!map) return -EIO; - tgt = dm_table_find_target(map, sector); - if (!tgt) { - ret = -EIO; - goto out; - } + do { + struct dm_target *tgt; - /* - * 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; - } + tgt = dm_table_find_target(map, args.next_sector); + if (WARN_ON_ONCE(!tgt->type->report_zones)) { + ret = -EIO; + goto out; + } - ret = tgt->type->report_zones(tgt, sector, zones, nr_zones); + args.tgt = tgt; + ret = tgt->type->report_zones(tgt, &args, nr_zones); + if (ret < 0) + goto out; + } while (args.zone_idx < nr_zones && + args.next_sector < get_capacity(disk)); + ret = args.zone_idx; out: dm_put_live_table(md, srcu_idx); return ret; -#else - return -ENOTSUPP; -#endif } +#else +#define dm_blk_report_zones NULL +#endif /* CONFIG_BLK_DEV_ZONED */ static int dm_prepare_ioctl(struct mapped_device *md, int *srcu_idx, struct block_device **bdev) @@ -1207,51 +1239,6 @@ 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 underlying device of the target. The zone - * descriptors must be remapped to match their position within the dm device. - */ -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 blk_zone *zone; - unsigned int nrz = *nr_zones; - int i; - - /* - * 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. - */ - 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; - } - - zone->start = zone->start + ti->begin - start; - if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL) - continue; - - 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; - } - - *nr_zones = i; -#else /* !CONFIG_BLK_DEV_ZONED */ - *nr_zones = 0; -#endif -} -EXPORT_SYMBOL_GPL(dm_remap_zone_report); - static blk_qc_t __map_bio(struct dm_target_io *tio) { int r; diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h index bf2102a749bc..42fd3f00e4a5 100644 --- a/drivers/scsi/sd.h +++ b/drivers/scsi/sd.h @@ -213,8 +213,8 @@ blk_status_t sd_zbc_setup_zone_mgmt_cmnd(struct scsi_cmnd *cmd, unsigned char op, bool all); 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); +int sd_zbc_report_zones(struct gendisk *disk, sector_t sector, + unsigned int nr_zones, report_zones_cb cb, void *data); #else /* CONFIG_BLK_DEV_ZONED */ diff --git a/drivers/scsi/sd_zbc.c b/drivers/scsi/sd_zbc.c index 663608d1003b..23281825ec38 100644 --- a/drivers/scsi/sd_zbc.c +++ b/drivers/scsi/sd_zbc.c @@ -19,34 +19,27 @@ #include "sd.h" -/** - * sd_zbc_parse_report - Convert a zone descriptor to a struct blk_zone, - * @sdkp: The disk the report originated from - * @buf: Address of the report zone descriptor - * @zone: the destination zone structure - * - * All LBA sized values are converted to 512B sectors unit. - */ -static void sd_zbc_parse_report(struct scsi_disk *sdkp, u8 *buf, - struct blk_zone *zone) +static int sd_zbc_parse_report(struct scsi_disk *sdkp, u8 *buf, + unsigned int idx, report_zones_cb cb, void *data) { struct scsi_device *sdp = sdkp->device; + struct blk_zone zone = { 0 }; - memset(zone, 0, sizeof(struct blk_zone)); - - zone->type = buf[0] & 0x0f; - zone->cond = (buf[1] >> 4) & 0xf; + zone.type = buf[0] & 0x0f; + zone.cond = (buf[1] >> 4) & 0xf; if (buf[1] & 0x01) - zone->reset = 1; + zone.reset = 1; if (buf[1] & 0x02) - zone->non_seq = 1; - - zone->len = logical_to_sectors(sdp, get_unaligned_be64(&buf[8])); - zone->start = logical_to_sectors(sdp, get_unaligned_be64(&buf[16])); - zone->wp = logical_to_sectors(sdp, get_unaligned_be64(&buf[24])); - if (zone->type != ZBC_ZONE_TYPE_CONV && - zone->cond == ZBC_ZONE_COND_FULL) - zone->wp = zone->start + zone->len; + zone.non_seq = 1; + + zone.len = logical_to_sectors(sdp, get_unaligned_be64(&buf[8])); + zone.start = logical_to_sectors(sdp, get_unaligned_be64(&buf[16])); + zone.wp = logical_to_sectors(sdp, get_unaligned_be64(&buf[24])); + if (zone.type != ZBC_ZONE_TYPE_CONV && + zone.cond == ZBC_ZONE_COND_FULL) + zone.wp = zone.start + zone.len; + + return cb(&zone, idx, data); } /** @@ -154,61 +147,62 @@ static void *sd_zbc_alloc_report_buffer(struct scsi_disk *sdkp, } /** - * 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 - * - * Execute a report zones command on the target disk. + * sd_zbc_zone_sectors - Get the device zone size in number of 512B sectors. + * @sdkp: The target disk */ +static inline sector_t sd_zbc_zone_sectors(struct scsi_disk *sdkp) +{ + return logical_to_sectors(sdkp->device, sdkp->zone_blocks); +} + int sd_zbc_report_zones(struct gendisk *disk, sector_t sector, - struct blk_zone *zones, unsigned int *nr_zones) + unsigned int nr_zones, report_zones_cb cb, void *data) { struct scsi_disk *sdkp = scsi_disk(disk); - unsigned int i, nrz = *nr_zones; + unsigned int nr, i; unsigned char *buf; - size_t buflen = 0, offset = 0; - int ret = 0; + size_t offset, buflen = 0; + int zone_idx = 0; + int ret; if (!sd_is_zoned(sdkp)) /* Not a zoned device */ return -EOPNOTSUPP; - buf = sd_zbc_alloc_report_buffer(sdkp, nrz, &buflen); + buf = sd_zbc_alloc_report_buffer(sdkp, nr_zones, &buflen); if (!buf) return -ENOMEM; - ret = sd_zbc_do_report_zones(sdkp, buf, buflen, - sectors_to_logical(sdkp->device, sector), true); - if (ret) - goto out; + while (zone_idx < nr_zones && sector < get_capacity(disk)) { + ret = sd_zbc_do_report_zones(sdkp, buf, buflen, + sectors_to_logical(sdkp->device, sector), true); + if (ret) + goto out; + + offset = 0; + nr = min(nr_zones, get_unaligned_be32(&buf[0]) / 64); + if (!nr) + break; + + for (i = 0; i < nr && zone_idx < nr_zones; i++) { + offset += 64; + ret = sd_zbc_parse_report(sdkp, buf + offset, zone_idx, + cb, data); + if (ret) + goto out; + zone_idx++; + } - 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++; + sector += sd_zbc_zone_sectors(sdkp) * i; } - *nr_zones = nrz; - + ret = zone_idx; out: kvfree(buf); - return ret; } /** - * sd_zbc_zone_sectors - Get the device zone size in number of 512B sectors. - * @sdkp: The target disk - */ -static inline sector_t sd_zbc_zone_sectors(struct scsi_disk *sdkp) -{ - return logical_to_sectors(sdkp->device, sdkp->zone_blocks); -} - -/** * sd_zbc_setup_zone_mgmt_cmnd - Prepare a zone ZBC_OUT command. The operations * can be RESET WRITE POINTER, OPEN, CLOSE or FINISH. * @cmd: the command to setup |