2018-07-06 17:38:39 +00:00
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/vmalloc.h>
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2020-10-29 11:05:00 +00:00
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#include <linux/bitmap.h>
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2018-07-06 17:38:39 +00:00
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#include "null_blk.h"
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2020-03-25 17:49:56 +00:00
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#define CREATE_TRACE_POINTS
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#include "null_blk_trace.h"
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2018-07-06 17:38:39 +00:00
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/* zone_size in MBs to sectors. */
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#define ZONE_SIZE_SHIFT 11
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static inline unsigned int null_zone_no(struct nullb_device *dev, sector_t sect)
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{
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return sect >> ilog2(dev->zone_size_sects);
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}
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2020-04-23 03:02:38 +00:00
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int null_init_zoned_dev(struct nullb_device *dev, struct request_queue *q)
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2018-07-06 17:38:39 +00:00
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{
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sector_t dev_size = (sector_t)dev->size * 1024 * 1024;
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sector_t sector = 0;
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unsigned int i;
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if (!is_power_of_2(dev->zone_size)) {
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2019-09-16 14:07:59 +00:00
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pr_err("zone_size must be power-of-two\n");
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2018-07-06 17:38:39 +00:00
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return -EINVAL;
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}
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2020-05-20 23:01:51 +00:00
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if (dev->zone_size > dev->size) {
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pr_err("Zone size larger than device capacity\n");
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return -EINVAL;
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}
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2018-07-06 17:38:39 +00:00
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2020-06-29 19:06:38 +00:00
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if (!dev->zone_capacity)
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dev->zone_capacity = dev->zone_size;
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if (dev->zone_capacity > dev->zone_size) {
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pr_err("null_blk: zone capacity (%lu MB) larger than zone size (%lu MB)\n",
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dev->zone_capacity, dev->zone_size);
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return -EINVAL;
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}
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2018-07-06 17:38:39 +00:00
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dev->zone_size_sects = dev->zone_size << ZONE_SIZE_SHIFT;
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dev->nr_zones = dev_size >>
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(SECTOR_SHIFT + ilog2(dev->zone_size_sects));
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dev->zones = kvmalloc_array(dev->nr_zones, sizeof(struct blk_zone),
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GFP_KERNEL | __GFP_ZERO);
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if (!dev->zones)
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return -ENOMEM;
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2020-11-06 11:01:41 +00:00
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/*
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* With memory backing, the zone_lock spinlock needs to be temporarily
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* released to avoid scheduling in atomic context. To guarantee zone
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* information protection, use a bitmap to lock zones with
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* wait_on_bit_lock_io(). Sleeping on the lock is OK as memory backing
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* implies that the queue is marked with BLK_MQ_F_BLOCKING.
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*/
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spin_lock_init(&dev->zone_lock);
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if (dev->memory_backed) {
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dev->zone_locks = bitmap_zalloc(dev->nr_zones, GFP_KERNEL);
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if (!dev->zone_locks) {
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kvfree(dev->zones);
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return -ENOMEM;
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}
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2020-10-29 11:05:00 +00:00
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}
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2018-10-30 07:14:05 +00:00
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if (dev->zone_nr_conv >= dev->nr_zones) {
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dev->zone_nr_conv = dev->nr_zones - 1;
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2019-09-16 14:07:59 +00:00
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pr_info("changed the number of conventional zones to %u",
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2018-10-30 07:14:05 +00:00
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dev->zone_nr_conv);
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}
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2020-08-28 10:54:00 +00:00
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/* Max active zones has to be < nbr of seq zones in order to be enforceable */
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if (dev->zone_max_active >= dev->nr_zones - dev->zone_nr_conv) {
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dev->zone_max_active = 0;
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pr_info("zone_max_active limit disabled, limit >= zone count\n");
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}
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/* Max open zones has to be <= max active zones */
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if (dev->zone_max_active && dev->zone_max_open > dev->zone_max_active) {
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dev->zone_max_open = dev->zone_max_active;
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pr_info("changed the maximum number of open zones to %u\n",
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dev->nr_zones);
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} else if (dev->zone_max_open >= dev->nr_zones - dev->zone_nr_conv) {
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dev->zone_max_open = 0;
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pr_info("zone_max_open limit disabled, limit >= zone count\n");
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}
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2018-10-30 07:14:05 +00:00
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for (i = 0; i < dev->zone_nr_conv; i++) {
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struct blk_zone *zone = &dev->zones[i];
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zone->start = sector;
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zone->len = dev->zone_size_sects;
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2020-06-29 19:06:37 +00:00
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zone->capacity = zone->len;
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2018-10-30 07:14:05 +00:00
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zone->wp = zone->start + zone->len;
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zone->type = BLK_ZONE_TYPE_CONVENTIONAL;
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zone->cond = BLK_ZONE_COND_NOT_WP;
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sector += dev->zone_size_sects;
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}
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for (i = dev->zone_nr_conv; i < dev->nr_zones; i++) {
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2018-07-06 17:38:39 +00:00
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struct blk_zone *zone = &dev->zones[i];
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zone->start = zone->wp = sector;
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zone->len = dev->zone_size_sects;
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2020-06-29 19:06:38 +00:00
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zone->capacity = dev->zone_capacity << ZONE_SIZE_SHIFT;
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2018-07-06 17:38:39 +00:00
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zone->type = BLK_ZONE_TYPE_SEQWRITE_REQ;
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zone->cond = BLK_ZONE_COND_EMPTY;
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sector += dev->zone_size_sects;
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}
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2020-04-23 03:02:38 +00:00
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q->limits.zoned = BLK_ZONED_HM;
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blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, q);
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blk_queue_required_elevator_features(q, ELEVATOR_F_ZBD_SEQ_WRITE);
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return 0;
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}
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int null_register_zoned_dev(struct nullb *nullb)
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{
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2020-05-12 08:55:52 +00:00
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struct nullb_device *dev = nullb->dev;
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2020-04-23 03:02:38 +00:00
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struct request_queue *q = nullb->q;
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2020-05-12 08:55:52 +00:00
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if (queue_is_mq(q)) {
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int ret = blk_revalidate_disk_zones(nullb->disk, NULL);
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if (ret)
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return ret;
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} else {
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blk_queue_chunk_sectors(q, dev->zone_size_sects);
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q->nr_zones = blkdev_nr_zones(nullb->disk);
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}
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2020-04-23 03:02:38 +00:00
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2020-05-12 08:55:52 +00:00
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blk_queue_max_zone_append_sectors(q, dev->zone_size_sects);
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2020-08-28 10:54:00 +00:00
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blk_queue_max_open_zones(q, dev->zone_max_open);
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blk_queue_max_active_zones(q, dev->zone_max_active);
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2020-04-23 03:02:38 +00:00
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2018-07-06 17:38:39 +00:00
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return 0;
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}
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2020-04-23 03:02:38 +00:00
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void null_free_zoned_dev(struct nullb_device *dev)
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2018-07-06 17:38:39 +00:00
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{
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2020-10-29 11:05:00 +00:00
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bitmap_free(dev->zone_locks);
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2018-07-06 17:38:39 +00:00
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kvfree(dev->zones);
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}
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2020-10-29 11:05:00 +00:00
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static inline void null_lock_zone(struct nullb_device *dev, unsigned int zno)
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{
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2020-11-06 11:01:41 +00:00
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if (dev->memory_backed)
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wait_on_bit_lock_io(dev->zone_locks, zno, TASK_UNINTERRUPTIBLE);
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spin_lock_irq(&dev->zone_lock);
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2020-10-29 11:05:00 +00:00
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}
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static inline void null_unlock_zone(struct nullb_device *dev, unsigned int zno)
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{
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2020-11-06 11:01:41 +00:00
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spin_unlock_irq(&dev->zone_lock);
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if (dev->memory_backed)
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clear_and_wake_up_bit(zno, dev->zone_locks);
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2020-10-29 11:05:00 +00:00
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}
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2019-11-11 02:39:27 +00:00
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int null_report_zones(struct gendisk *disk, sector_t sector,
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2019-11-11 02:39:30 +00:00
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unsigned int nr_zones, report_zones_cb cb, void *data)
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2018-07-06 17:38:39 +00:00
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{
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2018-10-12 10:08:49 +00:00
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struct nullb *nullb = disk->private_data;
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struct nullb_device *dev = nullb->dev;
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2020-10-29 11:05:00 +00:00
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unsigned int first_zone, i, zno;
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2019-11-11 02:39:30 +00:00
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struct blk_zone zone;
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int error;
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2018-07-06 17:38:39 +00:00
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2019-11-11 02:39:30 +00:00
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first_zone = null_zone_no(dev, sector);
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if (first_zone >= dev->nr_zones)
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return 0;
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2018-07-06 17:38:39 +00:00
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2019-11-11 02:39:30 +00:00
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nr_zones = min(nr_zones, dev->nr_zones - first_zone);
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2020-03-25 17:49:56 +00:00
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trace_nullb_report_zones(nullb, nr_zones);
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2020-10-29 11:05:00 +00:00
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zno = first_zone;
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for (i = 0; i < nr_zones; i++, zno++) {
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2019-11-11 02:39:30 +00:00
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/*
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* Stacked DM target drivers will remap the zone information by
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* modifying the zone information passed to the report callback.
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* So use a local copy to avoid corruption of the device zone
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* array.
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*/
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2020-10-29 11:05:00 +00:00
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null_lock_zone(dev, zno);
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memcpy(&zone, &dev->zones[zno], sizeof(struct blk_zone));
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null_unlock_zone(dev, zno);
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2020-09-28 09:55:49 +00:00
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2019-11-11 02:39:30 +00:00
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error = cb(&zone, i, data);
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if (error)
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return error;
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}
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2018-07-06 17:38:39 +00:00
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2019-11-11 02:39:30 +00:00
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return nr_zones;
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2018-07-06 17:38:39 +00:00
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}
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2020-10-29 11:05:00 +00:00
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/*
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* This is called in the case of memory backing from null_process_cmd()
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* with the target zone already locked.
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*/
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2019-10-17 21:19:43 +00:00
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size_t null_zone_valid_read_len(struct nullb *nullb,
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sector_t sector, unsigned int len)
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{
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struct nullb_device *dev = nullb->dev;
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struct blk_zone *zone = &dev->zones[null_zone_no(dev, sector)];
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unsigned int nr_sectors = len >> SECTOR_SHIFT;
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/* Read must be below the write pointer position */
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if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL ||
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sector + nr_sectors <= zone->wp)
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return len;
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if (sector > zone->wp)
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return 0;
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return (zone->wp - sector) << SECTOR_SHIFT;
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}
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2020-08-28 10:54:00 +00:00
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static blk_status_t null_close_zone(struct nullb_device *dev, struct blk_zone *zone)
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{
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if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
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return BLK_STS_IOERR;
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switch (zone->cond) {
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case BLK_ZONE_COND_CLOSED:
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/* close operation on closed is not an error */
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return BLK_STS_OK;
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case BLK_ZONE_COND_IMP_OPEN:
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dev->nr_zones_imp_open--;
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break;
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case BLK_ZONE_COND_EXP_OPEN:
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dev->nr_zones_exp_open--;
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break;
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case BLK_ZONE_COND_EMPTY:
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case BLK_ZONE_COND_FULL:
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default:
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return BLK_STS_IOERR;
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}
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if (zone->wp == zone->start) {
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zone->cond = BLK_ZONE_COND_EMPTY;
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} else {
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zone->cond = BLK_ZONE_COND_CLOSED;
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dev->nr_zones_closed++;
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}
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return BLK_STS_OK;
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}
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static void null_close_first_imp_zone(struct nullb_device *dev)
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{
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unsigned int i;
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for (i = dev->zone_nr_conv; i < dev->nr_zones; i++) {
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if (dev->zones[i].cond == BLK_ZONE_COND_IMP_OPEN) {
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null_close_zone(dev, &dev->zones[i]);
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return;
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}
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}
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}
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2020-10-22 15:47:39 +00:00
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static blk_status_t null_check_active(struct nullb_device *dev)
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2020-08-28 10:54:00 +00:00
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{
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if (!dev->zone_max_active)
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2020-10-22 15:47:39 +00:00
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return BLK_STS_OK;
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if (dev->nr_zones_exp_open + dev->nr_zones_imp_open +
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dev->nr_zones_closed < dev->zone_max_active)
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return BLK_STS_OK;
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2020-08-28 10:54:00 +00:00
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2020-10-22 15:47:39 +00:00
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return BLK_STS_ZONE_ACTIVE_RESOURCE;
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2020-08-28 10:54:00 +00:00
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}
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2020-10-22 15:47:39 +00:00
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static blk_status_t null_check_open(struct nullb_device *dev)
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2020-08-28 10:54:00 +00:00
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{
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if (!dev->zone_max_open)
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2020-10-22 15:47:39 +00:00
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return BLK_STS_OK;
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2020-08-28 10:54:00 +00:00
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if (dev->nr_zones_exp_open + dev->nr_zones_imp_open < dev->zone_max_open)
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2020-10-22 15:47:39 +00:00
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return BLK_STS_OK;
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2020-08-28 10:54:00 +00:00
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2020-10-22 15:47:39 +00:00
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if (dev->nr_zones_imp_open) {
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if (null_check_active(dev) == BLK_STS_OK) {
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null_close_first_imp_zone(dev);
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return BLK_STS_OK;
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}
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2020-08-28 10:54:00 +00:00
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}
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2020-10-22 15:47:39 +00:00
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return BLK_STS_ZONE_OPEN_RESOURCE;
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2020-08-28 10:54:00 +00:00
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}
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/*
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* This function matches the manage open zone resources function in the ZBC standard,
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* with the addition of max active zones support (added in the ZNS standard).
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*
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* The function determines if a zone can transition to implicit open or explicit open,
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* while maintaining the max open zone (and max active zone) limit(s). It may close an
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* implicit open zone in order to make additional zone resources available.
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*
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* ZBC states that an implicit open zone shall be closed only if there is not
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* room within the open limit. However, with the addition of an active limit,
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* it is not certain that closing an implicit open zone will allow a new zone
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|
* to be opened, since we might already be at the active limit capacity.
|
|
|
|
*/
|
2020-10-22 15:47:39 +00:00
|
|
|
static blk_status_t null_check_zone_resources(struct nullb_device *dev, struct blk_zone *zone)
|
2020-08-28 10:54:00 +00:00
|
|
|
{
|
2020-10-22 15:47:39 +00:00
|
|
|
blk_status_t ret;
|
|
|
|
|
2020-08-28 10:54:00 +00:00
|
|
|
switch (zone->cond) {
|
|
|
|
case BLK_ZONE_COND_EMPTY:
|
2020-10-22 15:47:39 +00:00
|
|
|
ret = null_check_active(dev);
|
|
|
|
if (ret != BLK_STS_OK)
|
|
|
|
return ret;
|
2020-08-28 10:54:00 +00:00
|
|
|
fallthrough;
|
|
|
|
case BLK_ZONE_COND_CLOSED:
|
2020-10-22 15:47:39 +00:00
|
|
|
return null_check_open(dev);
|
2020-08-28 10:54:00 +00:00
|
|
|
default:
|
|
|
|
/* Should never be called for other states */
|
|
|
|
WARN_ON(1);
|
2020-10-22 15:47:39 +00:00
|
|
|
return BLK_STS_IOERR;
|
2020-08-28 10:54:00 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-08-23 04:45:18 +00:00
|
|
|
static blk_status_t null_zone_write(struct nullb_cmd *cmd, sector_t sector,
|
2020-05-12 08:55:52 +00:00
|
|
|
unsigned int nr_sectors, bool append)
|
2018-07-06 17:38:39 +00:00
|
|
|
{
|
|
|
|
struct nullb_device *dev = cmd->nq->dev;
|
|
|
|
unsigned int zno = null_zone_no(dev, sector);
|
|
|
|
struct blk_zone *zone = &dev->zones[zno];
|
2020-04-23 03:02:37 +00:00
|
|
|
blk_status_t ret;
|
|
|
|
|
|
|
|
trace_nullb_zone_op(cmd, zno, zone->cond);
|
|
|
|
|
|
|
|
if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
|
|
|
|
return null_process_cmd(cmd, REQ_OP_WRITE, sector, nr_sectors);
|
2018-07-06 17:38:39 +00:00
|
|
|
|
2020-10-29 11:05:00 +00:00
|
|
|
null_lock_zone(dev, zno);
|
|
|
|
|
2018-07-06 17:38:39 +00:00
|
|
|
switch (zone->cond) {
|
|
|
|
case BLK_ZONE_COND_FULL:
|
|
|
|
/* Cannot write to a full zone */
|
2020-10-29 11:05:00 +00:00
|
|
|
ret = BLK_STS_IOERR;
|
|
|
|
goto unlock;
|
2018-07-06 17:38:39 +00:00
|
|
|
case BLK_ZONE_COND_EMPTY:
|
2020-08-28 10:54:00 +00:00
|
|
|
case BLK_ZONE_COND_CLOSED:
|
2020-10-22 15:47:39 +00:00
|
|
|
ret = null_check_zone_resources(dev, zone);
|
|
|
|
if (ret != BLK_STS_OK)
|
2020-10-29 11:05:00 +00:00
|
|
|
goto unlock;
|
2020-08-28 10:54:00 +00:00
|
|
|
break;
|
2018-07-06 17:38:39 +00:00
|
|
|
case BLK_ZONE_COND_IMP_OPEN:
|
2020-01-09 05:03:55 +00:00
|
|
|
case BLK_ZONE_COND_EXP_OPEN:
|
2020-08-28 10:54:00 +00:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
/* Invalid zone condition */
|
2020-10-29 11:05:00 +00:00
|
|
|
ret = BLK_STS_IOERR;
|
|
|
|
goto unlock;
|
2020-08-28 10:54:00 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Regular writes must be at the write pointer position.
|
|
|
|
* Zone append writes are automatically issued at the write
|
|
|
|
* pointer and the position returned using the request or BIO
|
|
|
|
* sector.
|
|
|
|
*/
|
|
|
|
if (append) {
|
|
|
|
sector = zone->wp;
|
|
|
|
if (cmd->bio)
|
|
|
|
cmd->bio->bi_iter.bi_sector = sector;
|
|
|
|
else
|
|
|
|
cmd->rq->__sector = sector;
|
|
|
|
} else if (sector != zone->wp) {
|
2020-10-29 11:05:00 +00:00
|
|
|
ret = BLK_STS_IOERR;
|
|
|
|
goto unlock;
|
2020-08-28 10:54:00 +00:00
|
|
|
}
|
|
|
|
|
2020-10-29 11:05:00 +00:00
|
|
|
if (zone->wp + nr_sectors > zone->start + zone->capacity) {
|
|
|
|
ret = BLK_STS_IOERR;
|
|
|
|
goto unlock;
|
|
|
|
}
|
2020-08-28 10:54:00 +00:00
|
|
|
|
|
|
|
if (zone->cond == BLK_ZONE_COND_CLOSED) {
|
|
|
|
dev->nr_zones_closed--;
|
|
|
|
dev->nr_zones_imp_open++;
|
|
|
|
} else if (zone->cond == BLK_ZONE_COND_EMPTY) {
|
|
|
|
dev->nr_zones_imp_open++;
|
|
|
|
}
|
|
|
|
if (zone->cond != BLK_ZONE_COND_EXP_OPEN)
|
|
|
|
zone->cond = BLK_ZONE_COND_IMP_OPEN;
|
|
|
|
|
2020-11-06 11:01:41 +00:00
|
|
|
/*
|
|
|
|
* Memory backing allocation may sleep: release the zone_lock spinlock
|
|
|
|
* to avoid scheduling in atomic context. Zone operation atomicity is
|
|
|
|
* still guaranteed through the zone_locks bitmap.
|
|
|
|
*/
|
|
|
|
if (dev->memory_backed)
|
|
|
|
spin_unlock_irq(&dev->zone_lock);
|
2020-08-28 10:54:00 +00:00
|
|
|
ret = null_process_cmd(cmd, REQ_OP_WRITE, sector, nr_sectors);
|
2020-11-06 11:01:41 +00:00
|
|
|
if (dev->memory_backed)
|
|
|
|
spin_lock_irq(&dev->zone_lock);
|
|
|
|
|
2020-08-28 10:54:00 +00:00
|
|
|
if (ret != BLK_STS_OK)
|
2020-10-29 11:05:00 +00:00
|
|
|
goto unlock;
|
2020-08-28 10:54:00 +00:00
|
|
|
|
|
|
|
zone->wp += nr_sectors;
|
|
|
|
if (zone->wp == zone->start + zone->capacity) {
|
|
|
|
if (zone->cond == BLK_ZONE_COND_EXP_OPEN)
|
|
|
|
dev->nr_zones_exp_open--;
|
|
|
|
else if (zone->cond == BLK_ZONE_COND_IMP_OPEN)
|
|
|
|
dev->nr_zones_imp_open--;
|
|
|
|
zone->cond = BLK_ZONE_COND_FULL;
|
|
|
|
}
|
2020-10-29 11:05:00 +00:00
|
|
|
ret = BLK_STS_OK;
|
|
|
|
|
|
|
|
unlock:
|
|
|
|
null_unlock_zone(dev, zno);
|
|
|
|
|
|
|
|
return ret;
|
2020-08-28 10:54:00 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static blk_status_t null_open_zone(struct nullb_device *dev, struct blk_zone *zone)
|
|
|
|
{
|
2020-10-22 15:47:39 +00:00
|
|
|
blk_status_t ret;
|
|
|
|
|
2020-08-28 10:54:00 +00:00
|
|
|
if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
|
|
|
|
return BLK_STS_IOERR;
|
|
|
|
|
|
|
|
switch (zone->cond) {
|
|
|
|
case BLK_ZONE_COND_EXP_OPEN:
|
|
|
|
/* open operation on exp open is not an error */
|
|
|
|
return BLK_STS_OK;
|
|
|
|
case BLK_ZONE_COND_EMPTY:
|
2020-10-22 15:47:39 +00:00
|
|
|
ret = null_check_zone_resources(dev, zone);
|
|
|
|
if (ret != BLK_STS_OK)
|
|
|
|
return ret;
|
2020-08-28 10:54:00 +00:00
|
|
|
break;
|
|
|
|
case BLK_ZONE_COND_IMP_OPEN:
|
|
|
|
dev->nr_zones_imp_open--;
|
|
|
|
break;
|
2020-01-09 05:03:55 +00:00
|
|
|
case BLK_ZONE_COND_CLOSED:
|
2020-10-22 15:47:39 +00:00
|
|
|
ret = null_check_zone_resources(dev, zone);
|
|
|
|
if (ret != BLK_STS_OK)
|
|
|
|
return ret;
|
2020-08-28 10:54:00 +00:00
|
|
|
dev->nr_zones_closed--;
|
|
|
|
break;
|
|
|
|
case BLK_ZONE_COND_FULL:
|
|
|
|
default:
|
|
|
|
return BLK_STS_IOERR;
|
|
|
|
}
|
|
|
|
|
|
|
|
zone->cond = BLK_ZONE_COND_EXP_OPEN;
|
|
|
|
dev->nr_zones_exp_open++;
|
2018-07-06 17:38:39 +00:00
|
|
|
|
2020-08-28 10:54:00 +00:00
|
|
|
return BLK_STS_OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
static blk_status_t null_finish_zone(struct nullb_device *dev, struct blk_zone *zone)
|
|
|
|
{
|
2020-10-22 15:47:39 +00:00
|
|
|
blk_status_t ret;
|
|
|
|
|
2020-08-28 10:54:00 +00:00
|
|
|
if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
|
|
|
|
return BLK_STS_IOERR;
|
|
|
|
|
|
|
|
switch (zone->cond) {
|
|
|
|
case BLK_ZONE_COND_FULL:
|
|
|
|
/* finish operation on full is not an error */
|
|
|
|
return BLK_STS_OK;
|
|
|
|
case BLK_ZONE_COND_EMPTY:
|
2020-10-22 15:47:39 +00:00
|
|
|
ret = null_check_zone_resources(dev, zone);
|
|
|
|
if (ret != BLK_STS_OK)
|
|
|
|
return ret;
|
2020-08-28 10:54:00 +00:00
|
|
|
break;
|
|
|
|
case BLK_ZONE_COND_IMP_OPEN:
|
|
|
|
dev->nr_zones_imp_open--;
|
|
|
|
break;
|
|
|
|
case BLK_ZONE_COND_EXP_OPEN:
|
|
|
|
dev->nr_zones_exp_open--;
|
|
|
|
break;
|
|
|
|
case BLK_ZONE_COND_CLOSED:
|
2020-10-22 15:47:39 +00:00
|
|
|
ret = null_check_zone_resources(dev, zone);
|
|
|
|
if (ret != BLK_STS_OK)
|
|
|
|
return ret;
|
2020-08-28 10:54:00 +00:00
|
|
|
dev->nr_zones_closed--;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return BLK_STS_IOERR;
|
|
|
|
}
|
2020-06-29 19:06:38 +00:00
|
|
|
|
2020-08-28 10:54:00 +00:00
|
|
|
zone->cond = BLK_ZONE_COND_FULL;
|
|
|
|
zone->wp = zone->start + zone->len;
|
2018-07-06 17:38:39 +00:00
|
|
|
|
2020-08-28 10:54:00 +00:00
|
|
|
return BLK_STS_OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
static blk_status_t null_reset_zone(struct nullb_device *dev, struct blk_zone *zone)
|
|
|
|
{
|
|
|
|
if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
|
|
|
|
return BLK_STS_IOERR;
|
2020-04-23 03:02:37 +00:00
|
|
|
|
2020-08-28 10:54:00 +00:00
|
|
|
switch (zone->cond) {
|
|
|
|
case BLK_ZONE_COND_EMPTY:
|
|
|
|
/* reset operation on empty is not an error */
|
2020-04-23 03:02:37 +00:00
|
|
|
return BLK_STS_OK;
|
2020-08-28 10:54:00 +00:00
|
|
|
case BLK_ZONE_COND_IMP_OPEN:
|
|
|
|
dev->nr_zones_imp_open--;
|
|
|
|
break;
|
|
|
|
case BLK_ZONE_COND_EXP_OPEN:
|
|
|
|
dev->nr_zones_exp_open--;
|
|
|
|
break;
|
|
|
|
case BLK_ZONE_COND_CLOSED:
|
|
|
|
dev->nr_zones_closed--;
|
|
|
|
break;
|
|
|
|
case BLK_ZONE_COND_FULL:
|
|
|
|
break;
|
2018-07-06 17:38:39 +00:00
|
|
|
default:
|
2019-08-23 04:45:18 +00:00
|
|
|
return BLK_STS_IOERR;
|
2018-07-06 17:38:39 +00:00
|
|
|
}
|
2020-08-28 10:54:00 +00:00
|
|
|
|
|
|
|
zone->cond = BLK_ZONE_COND_EMPTY;
|
|
|
|
zone->wp = zone->start;
|
|
|
|
|
|
|
|
return BLK_STS_OK;
|
2018-07-06 17:38:39 +00:00
|
|
|
}
|
|
|
|
|
2019-10-27 14:05:49 +00:00
|
|
|
static blk_status_t null_zone_mgmt(struct nullb_cmd *cmd, enum req_opf op,
|
|
|
|
sector_t sector)
|
2018-07-06 17:38:39 +00:00
|
|
|
{
|
|
|
|
struct nullb_device *dev = cmd->nq->dev;
|
2020-10-29 11:05:00 +00:00
|
|
|
unsigned int zone_no;
|
|
|
|
struct blk_zone *zone;
|
|
|
|
blk_status_t ret;
|
2019-08-01 17:26:38 +00:00
|
|
|
size_t i;
|
|
|
|
|
2020-10-29 11:05:00 +00:00
|
|
|
if (op == REQ_OP_ZONE_RESET_ALL) {
|
2020-10-29 11:04:59 +00:00
|
|
|
for (i = dev->zone_nr_conv; i < dev->nr_zones; i++) {
|
2020-10-29 11:05:00 +00:00
|
|
|
null_lock_zone(dev, i);
|
2020-10-29 11:04:59 +00:00
|
|
|
zone = &dev->zones[i];
|
|
|
|
if (zone->cond != BLK_ZONE_COND_EMPTY) {
|
|
|
|
null_reset_zone(dev, zone);
|
|
|
|
trace_nullb_zone_op(cmd, i, zone->cond);
|
|
|
|
}
|
2020-10-29 11:05:00 +00:00
|
|
|
null_unlock_zone(dev, i);
|
2020-10-29 11:04:59 +00:00
|
|
|
}
|
|
|
|
return BLK_STS_OK;
|
2020-10-29 11:05:00 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
zone_no = null_zone_no(dev, sector);
|
|
|
|
zone = &dev->zones[zone_no];
|
|
|
|
|
|
|
|
null_lock_zone(dev, zone_no);
|
|
|
|
|
|
|
|
switch (op) {
|
2019-08-01 17:26:38 +00:00
|
|
|
case REQ_OP_ZONE_RESET:
|
2020-08-28 10:54:00 +00:00
|
|
|
ret = null_reset_zone(dev, zone);
|
2019-08-01 17:26:38 +00:00
|
|
|
break;
|
2019-10-27 14:05:49 +00:00
|
|
|
case REQ_OP_ZONE_OPEN:
|
2020-08-28 10:54:00 +00:00
|
|
|
ret = null_open_zone(dev, zone);
|
2019-10-27 14:05:49 +00:00
|
|
|
break;
|
|
|
|
case REQ_OP_ZONE_CLOSE:
|
2020-08-28 10:54:00 +00:00
|
|
|
ret = null_close_zone(dev, zone);
|
2019-10-27 14:05:49 +00:00
|
|
|
break;
|
|
|
|
case REQ_OP_ZONE_FINISH:
|
2020-08-28 10:54:00 +00:00
|
|
|
ret = null_finish_zone(dev, zone);
|
2019-10-27 14:05:49 +00:00
|
|
|
break;
|
2019-08-01 17:26:38 +00:00
|
|
|
default:
|
2020-10-29 11:05:00 +00:00
|
|
|
ret = BLK_STS_NOTSUPP;
|
|
|
|
break;
|
2018-10-30 07:14:05 +00:00
|
|
|
}
|
2020-03-25 17:49:56 +00:00
|
|
|
|
2020-08-28 10:54:00 +00:00
|
|
|
if (ret == BLK_STS_OK)
|
|
|
|
trace_nullb_zone_op(cmd, zone_no, zone->cond);
|
|
|
|
|
2020-10-29 11:05:00 +00:00
|
|
|
null_unlock_zone(dev, zone_no);
|
|
|
|
|
2020-08-28 10:54:00 +00:00
|
|
|
return ret;
|
2019-08-23 04:45:18 +00:00
|
|
|
}
|
|
|
|
|
2020-04-23 03:02:37 +00:00
|
|
|
blk_status_t null_process_zoned_cmd(struct nullb_cmd *cmd, enum req_opf op,
|
|
|
|
sector_t sector, sector_t nr_sectors)
|
2019-08-23 04:45:18 +00:00
|
|
|
{
|
2020-09-28 09:55:49 +00:00
|
|
|
struct nullb_device *dev = cmd->nq->dev;
|
2020-10-29 11:05:00 +00:00
|
|
|
unsigned int zno = null_zone_no(dev, sector);
|
|
|
|
blk_status_t sts;
|
2020-09-28 09:55:49 +00:00
|
|
|
|
2019-08-23 04:45:18 +00:00
|
|
|
switch (op) {
|
|
|
|
case REQ_OP_WRITE:
|
2020-09-28 09:55:49 +00:00
|
|
|
sts = null_zone_write(cmd, sector, nr_sectors, false);
|
|
|
|
break;
|
2020-05-12 08:55:52 +00:00
|
|
|
case REQ_OP_ZONE_APPEND:
|
2020-09-28 09:55:49 +00:00
|
|
|
sts = null_zone_write(cmd, sector, nr_sectors, true);
|
|
|
|
break;
|
2019-08-23 04:45:18 +00:00
|
|
|
case REQ_OP_ZONE_RESET:
|
|
|
|
case REQ_OP_ZONE_RESET_ALL:
|
2019-10-27 14:05:49 +00:00
|
|
|
case REQ_OP_ZONE_OPEN:
|
|
|
|
case REQ_OP_ZONE_CLOSE:
|
|
|
|
case REQ_OP_ZONE_FINISH:
|
2020-09-28 09:55:49 +00:00
|
|
|
sts = null_zone_mgmt(cmd, op, sector);
|
|
|
|
break;
|
2019-08-23 04:45:18 +00:00
|
|
|
default:
|
2020-10-29 11:05:00 +00:00
|
|
|
null_lock_zone(dev, zno);
|
2020-09-28 09:55:49 +00:00
|
|
|
sts = null_process_cmd(cmd, op, sector, nr_sectors);
|
2020-10-29 11:05:00 +00:00
|
|
|
null_unlock_zone(dev, zno);
|
2019-08-23 04:45:18 +00:00
|
|
|
}
|
2020-09-28 09:55:49 +00:00
|
|
|
|
|
|
|
return sts;
|
2018-07-06 17:38:39 +00:00
|
|
|
}
|