Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | #include <linux/vmalloc.h> |
Damien Le Moal | aa1c09cb6 | 2020-10-29 20:05:00 +0900 | [diff] [blame] | 3 | #include <linux/bitmap.h> |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 4 | #include "null_blk.h" |
| 5 | |
Chaitanya Kulkarni | 766c329 | 2020-03-25 10:49:56 -0700 | [diff] [blame] | 6 | #define CREATE_TRACE_POINTS |
Damien Le Moal | eebf34a | 2020-11-20 10:55:19 +0900 | [diff] [blame] | 7 | #include "trace.h" |
Chaitanya Kulkarni | 766c329 | 2020-03-25 10:49:56 -0700 | [diff] [blame] | 8 | |
Damien Le Moal | db060f5 | 2022-04-20 09:57:17 +0900 | [diff] [blame] | 9 | #undef pr_fmt |
| 10 | #define pr_fmt(fmt) "null_blk: " fmt |
| 11 | |
Damien Le Moal | cd92cdb | 2021-01-29 23:47:25 +0900 | [diff] [blame] | 12 | static inline sector_t mb_to_sects(unsigned long mb) |
| 13 | { |
| 14 | return ((sector_t)mb * SZ_1M) >> SECTOR_SHIFT; |
| 15 | } |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 16 | |
| 17 | static inline unsigned int null_zone_no(struct nullb_device *dev, sector_t sect) |
| 18 | { |
| 19 | return sect >> ilog2(dev->zone_size_sects); |
| 20 | } |
| 21 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 22 | static inline void null_lock_zone_res(struct nullb_device *dev) |
| 23 | { |
| 24 | if (dev->need_zone_res_mgmt) |
| 25 | spin_lock_irq(&dev->zone_res_lock); |
| 26 | } |
| 27 | |
| 28 | static inline void null_unlock_zone_res(struct nullb_device *dev) |
| 29 | { |
| 30 | if (dev->need_zone_res_mgmt) |
| 31 | spin_unlock_irq(&dev->zone_res_lock); |
| 32 | } |
| 33 | |
| 34 | static inline void null_init_zone_lock(struct nullb_device *dev, |
| 35 | struct nullb_zone *zone) |
| 36 | { |
| 37 | if (!dev->memory_backed) |
| 38 | spin_lock_init(&zone->spinlock); |
| 39 | else |
| 40 | mutex_init(&zone->mutex); |
| 41 | } |
| 42 | |
| 43 | static inline void null_lock_zone(struct nullb_device *dev, |
| 44 | struct nullb_zone *zone) |
| 45 | { |
| 46 | if (!dev->memory_backed) |
| 47 | spin_lock_irq(&zone->spinlock); |
| 48 | else |
| 49 | mutex_lock(&zone->mutex); |
| 50 | } |
| 51 | |
| 52 | static inline void null_unlock_zone(struct nullb_device *dev, |
| 53 | struct nullb_zone *zone) |
| 54 | { |
| 55 | if (!dev->memory_backed) |
| 56 | spin_unlock_irq(&zone->spinlock); |
| 57 | else |
| 58 | mutex_unlock(&zone->mutex); |
| 59 | } |
| 60 | |
Damien Le Moal | d205bde | 2020-04-23 12:02:38 +0900 | [diff] [blame] | 61 | int null_init_zoned_dev(struct nullb_device *dev, struct request_queue *q) |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 62 | { |
Damien Le Moal | 0ebcdd7 | 2020-11-20 10:55:11 +0900 | [diff] [blame] | 63 | sector_t dev_capacity_sects, zone_capacity_sects; |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 64 | struct nullb_zone *zone; |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 65 | sector_t sector = 0; |
| 66 | unsigned int i; |
| 67 | |
| 68 | if (!is_power_of_2(dev->zone_size)) { |
André Almeida | 9c7eddf | 2019-09-16 11:07:59 -0300 | [diff] [blame] | 69 | pr_err("zone_size must be power-of-two\n"); |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 70 | return -EINVAL; |
| 71 | } |
Chaitanya Kulkarni | e274832 | 2020-05-20 16:01:51 -0700 | [diff] [blame] | 72 | if (dev->zone_size > dev->size) { |
| 73 | pr_err("Zone size larger than device capacity\n"); |
| 74 | return -EINVAL; |
| 75 | } |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 76 | |
Aravind Ramesh | 089565f | 2020-06-29 12:06:38 -0700 | [diff] [blame] | 77 | if (!dev->zone_capacity) |
| 78 | dev->zone_capacity = dev->zone_size; |
| 79 | |
| 80 | if (dev->zone_capacity > dev->zone_size) { |
Damien Le Moal | db060f5 | 2022-04-20 09:57:17 +0900 | [diff] [blame] | 81 | pr_err("zone capacity (%lu MB) larger than zone size (%lu MB)\n", |
| 82 | dev->zone_capacity, dev->zone_size); |
Aravind Ramesh | 089565f | 2020-06-29 12:06:38 -0700 | [diff] [blame] | 83 | return -EINVAL; |
| 84 | } |
| 85 | |
Damien Le Moal | cd92cdb | 2021-01-29 23:47:25 +0900 | [diff] [blame] | 86 | zone_capacity_sects = mb_to_sects(dev->zone_capacity); |
| 87 | dev_capacity_sects = mb_to_sects(dev->size); |
| 88 | dev->zone_size_sects = mb_to_sects(dev->zone_size); |
| 89 | dev->nr_zones = round_up(dev_capacity_sects, dev->zone_size_sects) |
| 90 | >> ilog2(dev->zone_size_sects); |
Damien Le Moal | 0ebcdd7 | 2020-11-20 10:55:11 +0900 | [diff] [blame] | 91 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 92 | dev->zones = kvmalloc_array(dev->nr_zones, sizeof(struct nullb_zone), |
| 93 | GFP_KERNEL | __GFP_ZERO); |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 94 | if (!dev->zones) |
| 95 | return -ENOMEM; |
| 96 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 97 | spin_lock_init(&dev->zone_res_lock); |
Damien Le Moal | aa1c09cb6 | 2020-10-29 20:05:00 +0900 | [diff] [blame] | 98 | |
Masato Suzuki | ea2c18e | 2018-10-30 16:14:05 +0900 | [diff] [blame] | 99 | if (dev->zone_nr_conv >= dev->nr_zones) { |
| 100 | dev->zone_nr_conv = dev->nr_zones - 1; |
André Almeida | 9c7eddf | 2019-09-16 11:07:59 -0300 | [diff] [blame] | 101 | pr_info("changed the number of conventional zones to %u", |
Masato Suzuki | ea2c18e | 2018-10-30 16:14:05 +0900 | [diff] [blame] | 102 | dev->zone_nr_conv); |
| 103 | } |
| 104 | |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 105 | /* Max active zones has to be < nbr of seq zones in order to be enforceable */ |
| 106 | if (dev->zone_max_active >= dev->nr_zones - dev->zone_nr_conv) { |
| 107 | dev->zone_max_active = 0; |
| 108 | pr_info("zone_max_active limit disabled, limit >= zone count\n"); |
| 109 | } |
| 110 | |
| 111 | /* Max open zones has to be <= max active zones */ |
| 112 | if (dev->zone_max_active && dev->zone_max_open > dev->zone_max_active) { |
| 113 | dev->zone_max_open = dev->zone_max_active; |
| 114 | pr_info("changed the maximum number of open zones to %u\n", |
| 115 | dev->nr_zones); |
| 116 | } else if (dev->zone_max_open >= dev->nr_zones - dev->zone_nr_conv) { |
| 117 | dev->zone_max_open = 0; |
| 118 | pr_info("zone_max_open limit disabled, limit >= zone count\n"); |
| 119 | } |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 120 | dev->need_zone_res_mgmt = dev->zone_max_active || dev->zone_max_open; |
Damien Le Moal | 2e8c6e0 | 2020-11-20 10:55:15 +0900 | [diff] [blame] | 121 | dev->imp_close_zone_no = dev->zone_nr_conv; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 122 | |
Masato Suzuki | ea2c18e | 2018-10-30 16:14:05 +0900 | [diff] [blame] | 123 | for (i = 0; i < dev->zone_nr_conv; i++) { |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 124 | zone = &dev->zones[i]; |
Masato Suzuki | ea2c18e | 2018-10-30 16:14:05 +0900 | [diff] [blame] | 125 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 126 | null_init_zone_lock(dev, zone); |
Masato Suzuki | ea2c18e | 2018-10-30 16:14:05 +0900 | [diff] [blame] | 127 | zone->start = sector; |
| 128 | zone->len = dev->zone_size_sects; |
Matias Bjørling | 82394db | 2020-06-29 12:06:37 -0700 | [diff] [blame] | 129 | zone->capacity = zone->len; |
Masato Suzuki | ea2c18e | 2018-10-30 16:14:05 +0900 | [diff] [blame] | 130 | zone->wp = zone->start + zone->len; |
| 131 | zone->type = BLK_ZONE_TYPE_CONVENTIONAL; |
| 132 | zone->cond = BLK_ZONE_COND_NOT_WP; |
| 133 | |
| 134 | sector += dev->zone_size_sects; |
| 135 | } |
| 136 | |
| 137 | for (i = dev->zone_nr_conv; i < dev->nr_zones; i++) { |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 138 | zone = &dev->zones[i]; |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 139 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 140 | null_init_zone_lock(dev, zone); |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 141 | zone->start = zone->wp = sector; |
Damien Le Moal | 0ebcdd7 | 2020-11-20 10:55:11 +0900 | [diff] [blame] | 142 | if (zone->start + dev->zone_size_sects > dev_capacity_sects) |
| 143 | zone->len = dev_capacity_sects - zone->start; |
| 144 | else |
| 145 | zone->len = dev->zone_size_sects; |
| 146 | zone->capacity = |
| 147 | min_t(sector_t, zone->len, zone_capacity_sects); |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 148 | zone->type = BLK_ZONE_TYPE_SEQWRITE_REQ; |
| 149 | zone->cond = BLK_ZONE_COND_EMPTY; |
| 150 | |
| 151 | sector += dev->zone_size_sects; |
| 152 | } |
| 153 | |
| 154 | return 0; |
| 155 | } |
| 156 | |
Damien Le Moal | d205bde | 2020-04-23 12:02:38 +0900 | [diff] [blame] | 157 | int null_register_zoned_dev(struct nullb *nullb) |
| 158 | { |
Damien Le Moal | e0489ed | 2020-05-12 17:55:52 +0900 | [diff] [blame] | 159 | struct nullb_device *dev = nullb->dev; |
Damien Le Moal | d205bde | 2020-04-23 12:02:38 +0900 | [diff] [blame] | 160 | struct request_queue *q = nullb->q; |
| 161 | |
Christoph Hellwig | 6b2bd27 | 2022-07-06 09:03:40 +0200 | [diff] [blame] | 162 | disk_set_zoned(nullb->disk, BLK_ZONED_HM); |
Damien Le Moal | 5752dc7 | 2021-01-28 13:47:28 +0900 | [diff] [blame] | 163 | blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, q); |
| 164 | blk_queue_required_elevator_features(q, ELEVATOR_F_ZBD_SEQ_WRITE); |
| 165 | |
Damien Le Moal | e0489ed | 2020-05-12 17:55:52 +0900 | [diff] [blame] | 166 | if (queue_is_mq(q)) { |
| 167 | int ret = blk_revalidate_disk_zones(nullb->disk, NULL); |
Damien Le Moal | d205bde | 2020-04-23 12:02:38 +0900 | [diff] [blame] | 168 | |
Damien Le Moal | e0489ed | 2020-05-12 17:55:52 +0900 | [diff] [blame] | 169 | if (ret) |
| 170 | return ret; |
| 171 | } else { |
| 172 | blk_queue_chunk_sectors(q, dev->zone_size_sects); |
Christoph Hellwig | d86e716 | 2022-07-06 09:03:50 +0200 | [diff] [blame] | 173 | nullb->disk->nr_zones = bdev_nr_zones(nullb->disk->part0); |
Damien Le Moal | e0489ed | 2020-05-12 17:55:52 +0900 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | blk_queue_max_zone_append_sectors(q, dev->zone_size_sects); |
Christoph Hellwig | 982977d | 2022-07-06 09:03:44 +0200 | [diff] [blame] | 177 | disk_set_max_open_zones(nullb->disk, dev->zone_max_open); |
| 178 | disk_set_max_active_zones(nullb->disk, dev->zone_max_active); |
Damien Le Moal | d205bde | 2020-04-23 12:02:38 +0900 | [diff] [blame] | 179 | |
| 180 | return 0; |
| 181 | } |
| 182 | |
| 183 | void null_free_zoned_dev(struct nullb_device *dev) |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 184 | { |
| 185 | kvfree(dev->zones); |
Lv Yunlong | 72ce11d | 2021-04-26 07:32:29 -0700 | [diff] [blame] | 186 | dev->zones = NULL; |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 187 | } |
| 188 | |
Christoph Hellwig | 7fc8fb5 | 2019-11-11 11:39:27 +0900 | [diff] [blame] | 189 | int null_report_zones(struct gendisk *disk, sector_t sector, |
Christoph Hellwig | d410035 | 2019-11-11 11:39:30 +0900 | [diff] [blame] | 190 | unsigned int nr_zones, report_zones_cb cb, void *data) |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 191 | { |
Christoph Hellwig | e76239a | 2018-10-12 19:08:49 +0900 | [diff] [blame] | 192 | struct nullb *nullb = disk->private_data; |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 193 | struct nullb_device *dev = nullb->dev; |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 194 | unsigned int first_zone, i; |
| 195 | struct nullb_zone *zone; |
| 196 | struct blk_zone blkz; |
Christoph Hellwig | d410035 | 2019-11-11 11:39:30 +0900 | [diff] [blame] | 197 | int error; |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 198 | |
Christoph Hellwig | d410035 | 2019-11-11 11:39:30 +0900 | [diff] [blame] | 199 | first_zone = null_zone_no(dev, sector); |
| 200 | if (first_zone >= dev->nr_zones) |
| 201 | return 0; |
| 202 | |
| 203 | nr_zones = min(nr_zones, dev->nr_zones - first_zone); |
Chaitanya Kulkarni | 766c329 | 2020-03-25 10:49:56 -0700 | [diff] [blame] | 204 | trace_nullb_report_zones(nullb, nr_zones); |
| 205 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 206 | memset(&blkz, 0, sizeof(struct blk_zone)); |
| 207 | zone = &dev->zones[first_zone]; |
| 208 | for (i = 0; i < nr_zones; i++, zone++) { |
Christoph Hellwig | d410035 | 2019-11-11 11:39:30 +0900 | [diff] [blame] | 209 | /* |
| 210 | * Stacked DM target drivers will remap the zone information by |
| 211 | * modifying the zone information passed to the report callback. |
| 212 | * So use a local copy to avoid corruption of the device zone |
| 213 | * array. |
| 214 | */ |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 215 | null_lock_zone(dev, zone); |
| 216 | blkz.start = zone->start; |
| 217 | blkz.len = zone->len; |
| 218 | blkz.wp = zone->wp; |
| 219 | blkz.type = zone->type; |
| 220 | blkz.cond = zone->cond; |
| 221 | blkz.capacity = zone->capacity; |
| 222 | null_unlock_zone(dev, zone); |
Kanchan Joshi | 35bc10b | 2020-09-28 15:25:49 +0530 | [diff] [blame] | 223 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 224 | error = cb(&blkz, i, data); |
Christoph Hellwig | d410035 | 2019-11-11 11:39:30 +0900 | [diff] [blame] | 225 | if (error) |
| 226 | return error; |
Christoph Hellwig | e76239a | 2018-10-12 19:08:49 +0900 | [diff] [blame] | 227 | } |
| 228 | |
Christoph Hellwig | d410035 | 2019-11-11 11:39:30 +0900 | [diff] [blame] | 229 | return nr_zones; |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 230 | } |
| 231 | |
Damien Le Moal | aa1c09cb6 | 2020-10-29 20:05:00 +0900 | [diff] [blame] | 232 | /* |
| 233 | * This is called in the case of memory backing from null_process_cmd() |
| 234 | * with the target zone already locked. |
| 235 | */ |
Ajay Joshi | dd85b49 | 2019-10-17 14:19:43 -0700 | [diff] [blame] | 236 | size_t null_zone_valid_read_len(struct nullb *nullb, |
| 237 | sector_t sector, unsigned int len) |
| 238 | { |
| 239 | struct nullb_device *dev = nullb->dev; |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 240 | struct nullb_zone *zone = &dev->zones[null_zone_no(dev, sector)]; |
Ajay Joshi | dd85b49 | 2019-10-17 14:19:43 -0700 | [diff] [blame] | 241 | unsigned int nr_sectors = len >> SECTOR_SHIFT; |
| 242 | |
| 243 | /* Read must be below the write pointer position */ |
| 244 | if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL || |
| 245 | sector + nr_sectors <= zone->wp) |
| 246 | return len; |
| 247 | |
| 248 | if (sector > zone->wp) |
| 249 | return 0; |
| 250 | |
| 251 | return (zone->wp - sector) << SECTOR_SHIFT; |
| 252 | } |
| 253 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 254 | static blk_status_t __null_close_zone(struct nullb_device *dev, |
| 255 | struct nullb_zone *zone) |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 256 | { |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 257 | switch (zone->cond) { |
| 258 | case BLK_ZONE_COND_CLOSED: |
| 259 | /* close operation on closed is not an error */ |
| 260 | return BLK_STS_OK; |
| 261 | case BLK_ZONE_COND_IMP_OPEN: |
| 262 | dev->nr_zones_imp_open--; |
| 263 | break; |
| 264 | case BLK_ZONE_COND_EXP_OPEN: |
| 265 | dev->nr_zones_exp_open--; |
| 266 | break; |
| 267 | case BLK_ZONE_COND_EMPTY: |
| 268 | case BLK_ZONE_COND_FULL: |
| 269 | default: |
| 270 | return BLK_STS_IOERR; |
| 271 | } |
| 272 | |
| 273 | if (zone->wp == zone->start) { |
| 274 | zone->cond = BLK_ZONE_COND_EMPTY; |
| 275 | } else { |
| 276 | zone->cond = BLK_ZONE_COND_CLOSED; |
| 277 | dev->nr_zones_closed++; |
| 278 | } |
| 279 | |
| 280 | return BLK_STS_OK; |
| 281 | } |
| 282 | |
Damien Le Moal | 2e8c6e0 | 2020-11-20 10:55:15 +0900 | [diff] [blame] | 283 | static void null_close_imp_open_zone(struct nullb_device *dev) |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 284 | { |
Damien Le Moal | 2e8c6e0 | 2020-11-20 10:55:15 +0900 | [diff] [blame] | 285 | struct nullb_zone *zone; |
| 286 | unsigned int zno, i; |
| 287 | |
| 288 | zno = dev->imp_close_zone_no; |
| 289 | if (zno >= dev->nr_zones) |
| 290 | zno = dev->zone_nr_conv; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 291 | |
| 292 | for (i = dev->zone_nr_conv; i < dev->nr_zones; i++) { |
Damien Le Moal | 2e8c6e0 | 2020-11-20 10:55:15 +0900 | [diff] [blame] | 293 | zone = &dev->zones[zno]; |
| 294 | zno++; |
| 295 | if (zno >= dev->nr_zones) |
| 296 | zno = dev->zone_nr_conv; |
| 297 | |
| 298 | if (zone->cond == BLK_ZONE_COND_IMP_OPEN) { |
| 299 | __null_close_zone(dev, zone); |
| 300 | dev->imp_close_zone_no = zno; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 301 | return; |
| 302 | } |
| 303 | } |
| 304 | } |
| 305 | |
Keith Busch | fd78874 | 2020-10-22 08:47:39 -0700 | [diff] [blame] | 306 | static blk_status_t null_check_active(struct nullb_device *dev) |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 307 | { |
| 308 | if (!dev->zone_max_active) |
Keith Busch | fd78874 | 2020-10-22 08:47:39 -0700 | [diff] [blame] | 309 | return BLK_STS_OK; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 310 | |
Keith Busch | fd78874 | 2020-10-22 08:47:39 -0700 | [diff] [blame] | 311 | if (dev->nr_zones_exp_open + dev->nr_zones_imp_open + |
| 312 | dev->nr_zones_closed < dev->zone_max_active) |
| 313 | return BLK_STS_OK; |
| 314 | |
| 315 | return BLK_STS_ZONE_ACTIVE_RESOURCE; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 316 | } |
| 317 | |
Keith Busch | fd78874 | 2020-10-22 08:47:39 -0700 | [diff] [blame] | 318 | static blk_status_t null_check_open(struct nullb_device *dev) |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 319 | { |
| 320 | if (!dev->zone_max_open) |
Keith Busch | fd78874 | 2020-10-22 08:47:39 -0700 | [diff] [blame] | 321 | return BLK_STS_OK; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 322 | |
| 323 | if (dev->nr_zones_exp_open + dev->nr_zones_imp_open < dev->zone_max_open) |
Keith Busch | fd78874 | 2020-10-22 08:47:39 -0700 | [diff] [blame] | 324 | return BLK_STS_OK; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 325 | |
Keith Busch | fd78874 | 2020-10-22 08:47:39 -0700 | [diff] [blame] | 326 | if (dev->nr_zones_imp_open) { |
| 327 | if (null_check_active(dev) == BLK_STS_OK) { |
Damien Le Moal | 2e8c6e0 | 2020-11-20 10:55:15 +0900 | [diff] [blame] | 328 | null_close_imp_open_zone(dev); |
Keith Busch | fd78874 | 2020-10-22 08:47:39 -0700 | [diff] [blame] | 329 | return BLK_STS_OK; |
| 330 | } |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 331 | } |
| 332 | |
Keith Busch | fd78874 | 2020-10-22 08:47:39 -0700 | [diff] [blame] | 333 | return BLK_STS_ZONE_OPEN_RESOURCE; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 334 | } |
| 335 | |
| 336 | /* |
| 337 | * This function matches the manage open zone resources function in the ZBC standard, |
| 338 | * with the addition of max active zones support (added in the ZNS standard). |
| 339 | * |
| 340 | * The function determines if a zone can transition to implicit open or explicit open, |
| 341 | * while maintaining the max open zone (and max active zone) limit(s). It may close an |
| 342 | * implicit open zone in order to make additional zone resources available. |
| 343 | * |
| 344 | * ZBC states that an implicit open zone shall be closed only if there is not |
| 345 | * room within the open limit. However, with the addition of an active limit, |
| 346 | * it is not certain that closing an implicit open zone will allow a new zone |
| 347 | * to be opened, since we might already be at the active limit capacity. |
| 348 | */ |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 349 | static blk_status_t null_check_zone_resources(struct nullb_device *dev, |
| 350 | struct nullb_zone *zone) |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 351 | { |
Keith Busch | fd78874 | 2020-10-22 08:47:39 -0700 | [diff] [blame] | 352 | blk_status_t ret; |
| 353 | |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 354 | switch (zone->cond) { |
| 355 | case BLK_ZONE_COND_EMPTY: |
Keith Busch | fd78874 | 2020-10-22 08:47:39 -0700 | [diff] [blame] | 356 | ret = null_check_active(dev); |
| 357 | if (ret != BLK_STS_OK) |
| 358 | return ret; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 359 | fallthrough; |
| 360 | case BLK_ZONE_COND_CLOSED: |
Keith Busch | fd78874 | 2020-10-22 08:47:39 -0700 | [diff] [blame] | 361 | return null_check_open(dev); |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 362 | default: |
| 363 | /* Should never be called for other states */ |
| 364 | WARN_ON(1); |
Keith Busch | fd78874 | 2020-10-22 08:47:39 -0700 | [diff] [blame] | 365 | return BLK_STS_IOERR; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 366 | } |
| 367 | } |
| 368 | |
Chaitanya Kulkarni | fceb5d1 | 2019-08-22 21:45:18 -0700 | [diff] [blame] | 369 | static blk_status_t null_zone_write(struct nullb_cmd *cmd, sector_t sector, |
Damien Le Moal | e0489ed | 2020-05-12 17:55:52 +0900 | [diff] [blame] | 370 | unsigned int nr_sectors, bool append) |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 371 | { |
| 372 | struct nullb_device *dev = cmd->nq->dev; |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 373 | unsigned int zno = null_zone_no(dev, sector); |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 374 | struct nullb_zone *zone = &dev->zones[zno]; |
Damien Le Moal | 9dd44c7 | 2020-04-23 12:02:37 +0900 | [diff] [blame] | 375 | blk_status_t ret; |
| 376 | |
| 377 | trace_nullb_zone_op(cmd, zno, zone->cond); |
| 378 | |
Damien Le Moal | 2e896d8 | 2020-11-20 10:55:12 +0900 | [diff] [blame] | 379 | if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL) { |
| 380 | if (append) |
| 381 | return BLK_STS_IOERR; |
Damien Le Moal | 9dd44c7 | 2020-04-23 12:02:37 +0900 | [diff] [blame] | 382 | return null_process_cmd(cmd, REQ_OP_WRITE, sector, nr_sectors); |
Damien Le Moal | 2e896d8 | 2020-11-20 10:55:12 +0900 | [diff] [blame] | 383 | } |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 384 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 385 | null_lock_zone(dev, zone); |
Damien Le Moal | aa1c09cb6 | 2020-10-29 20:05:00 +0900 | [diff] [blame] | 386 | |
Shin'ichiro Kawasaki | d3a5738 | 2022-12-01 15:10:36 +0900 | [diff] [blame] | 387 | if (zone->cond == BLK_ZONE_COND_FULL || |
| 388 | zone->cond == BLK_ZONE_COND_READONLY || |
| 389 | zone->cond == BLK_ZONE_COND_OFFLINE) { |
| 390 | /* Cannot write to the zone */ |
Damien Le Moal | aa1c09cb6 | 2020-10-29 20:05:00 +0900 | [diff] [blame] | 391 | ret = BLK_STS_IOERR; |
| 392 | goto unlock; |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 393 | } |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 394 | |
| 395 | /* |
| 396 | * Regular writes must be at the write pointer position. |
| 397 | * Zone append writes are automatically issued at the write |
| 398 | * pointer and the position returned using the request or BIO |
| 399 | * sector. |
| 400 | */ |
| 401 | if (append) { |
| 402 | sector = zone->wp; |
Damien Le Moal | aacae8c | 2022-06-02 21:03:44 +0900 | [diff] [blame] | 403 | if (dev->queue_mode == NULL_Q_MQ) |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 404 | cmd->rq->__sector = sector; |
Damien Le Moal | aacae8c | 2022-06-02 21:03:44 +0900 | [diff] [blame] | 405 | else |
| 406 | cmd->bio->bi_iter.bi_sector = sector; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 407 | } else if (sector != zone->wp) { |
Damien Le Moal | aa1c09cb6 | 2020-10-29 20:05:00 +0900 | [diff] [blame] | 408 | ret = BLK_STS_IOERR; |
| 409 | goto unlock; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 410 | } |
| 411 | |
Damien Le Moal | aa1c09cb6 | 2020-10-29 20:05:00 +0900 | [diff] [blame] | 412 | if (zone->wp + nr_sectors > zone->start + zone->capacity) { |
| 413 | ret = BLK_STS_IOERR; |
| 414 | goto unlock; |
| 415 | } |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 416 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 417 | if (zone->cond == BLK_ZONE_COND_CLOSED || |
| 418 | zone->cond == BLK_ZONE_COND_EMPTY) { |
| 419 | null_lock_zone_res(dev); |
| 420 | |
| 421 | ret = null_check_zone_resources(dev, zone); |
| 422 | if (ret != BLK_STS_OK) { |
| 423 | null_unlock_zone_res(dev); |
| 424 | goto unlock; |
| 425 | } |
| 426 | if (zone->cond == BLK_ZONE_COND_CLOSED) { |
| 427 | dev->nr_zones_closed--; |
| 428 | dev->nr_zones_imp_open++; |
| 429 | } else if (zone->cond == BLK_ZONE_COND_EMPTY) { |
| 430 | dev->nr_zones_imp_open++; |
| 431 | } |
| 432 | |
| 433 | if (zone->cond != BLK_ZONE_COND_EXP_OPEN) |
| 434 | zone->cond = BLK_ZONE_COND_IMP_OPEN; |
| 435 | |
| 436 | null_unlock_zone_res(dev); |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 437 | } |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 438 | |
| 439 | ret = null_process_cmd(cmd, REQ_OP_WRITE, sector, nr_sectors); |
| 440 | if (ret != BLK_STS_OK) |
Damien Le Moal | aa1c09cb6 | 2020-10-29 20:05:00 +0900 | [diff] [blame] | 441 | goto unlock; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 442 | |
| 443 | zone->wp += nr_sectors; |
| 444 | if (zone->wp == zone->start + zone->capacity) { |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 445 | null_lock_zone_res(dev); |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 446 | if (zone->cond == BLK_ZONE_COND_EXP_OPEN) |
| 447 | dev->nr_zones_exp_open--; |
| 448 | else if (zone->cond == BLK_ZONE_COND_IMP_OPEN) |
| 449 | dev->nr_zones_imp_open--; |
| 450 | zone->cond = BLK_ZONE_COND_FULL; |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 451 | null_unlock_zone_res(dev); |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 452 | } |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 453 | |
Damien Le Moal | aa1c09cb6 | 2020-10-29 20:05:00 +0900 | [diff] [blame] | 454 | ret = BLK_STS_OK; |
| 455 | |
| 456 | unlock: |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 457 | null_unlock_zone(dev, zone); |
Damien Le Moal | aa1c09cb6 | 2020-10-29 20:05:00 +0900 | [diff] [blame] | 458 | |
| 459 | return ret; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 460 | } |
| 461 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 462 | static blk_status_t null_open_zone(struct nullb_device *dev, |
| 463 | struct nullb_zone *zone) |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 464 | { |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 465 | blk_status_t ret = BLK_STS_OK; |
Keith Busch | fd78874 | 2020-10-22 08:47:39 -0700 | [diff] [blame] | 466 | |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 467 | if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL) |
| 468 | return BLK_STS_IOERR; |
| 469 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 470 | null_lock_zone_res(dev); |
| 471 | |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 472 | switch (zone->cond) { |
| 473 | case BLK_ZONE_COND_EXP_OPEN: |
| 474 | /* open operation on exp open is not an error */ |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 475 | goto unlock; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 476 | case BLK_ZONE_COND_EMPTY: |
Keith Busch | fd78874 | 2020-10-22 08:47:39 -0700 | [diff] [blame] | 477 | ret = null_check_zone_resources(dev, zone); |
| 478 | if (ret != BLK_STS_OK) |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 479 | goto unlock; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 480 | break; |
| 481 | case BLK_ZONE_COND_IMP_OPEN: |
| 482 | dev->nr_zones_imp_open--; |
| 483 | break; |
| 484 | case BLK_ZONE_COND_CLOSED: |
Keith Busch | fd78874 | 2020-10-22 08:47:39 -0700 | [diff] [blame] | 485 | ret = null_check_zone_resources(dev, zone); |
| 486 | if (ret != BLK_STS_OK) |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 487 | goto unlock; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 488 | dev->nr_zones_closed--; |
| 489 | break; |
| 490 | case BLK_ZONE_COND_FULL: |
| 491 | default: |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 492 | ret = BLK_STS_IOERR; |
| 493 | goto unlock; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 494 | } |
| 495 | |
| 496 | zone->cond = BLK_ZONE_COND_EXP_OPEN; |
| 497 | dev->nr_zones_exp_open++; |
| 498 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 499 | unlock: |
| 500 | null_unlock_zone_res(dev); |
| 501 | |
| 502 | return ret; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 503 | } |
| 504 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 505 | static blk_status_t null_close_zone(struct nullb_device *dev, |
| 506 | struct nullb_zone *zone) |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 507 | { |
Keith Busch | fd78874 | 2020-10-22 08:47:39 -0700 | [diff] [blame] | 508 | blk_status_t ret; |
| 509 | |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 510 | if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL) |
| 511 | return BLK_STS_IOERR; |
| 512 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 513 | null_lock_zone_res(dev); |
| 514 | ret = __null_close_zone(dev, zone); |
| 515 | null_unlock_zone_res(dev); |
| 516 | |
| 517 | return ret; |
| 518 | } |
| 519 | |
| 520 | static blk_status_t null_finish_zone(struct nullb_device *dev, |
| 521 | struct nullb_zone *zone) |
| 522 | { |
| 523 | blk_status_t ret = BLK_STS_OK; |
| 524 | |
| 525 | if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL) |
| 526 | return BLK_STS_IOERR; |
| 527 | |
| 528 | null_lock_zone_res(dev); |
| 529 | |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 530 | switch (zone->cond) { |
| 531 | case BLK_ZONE_COND_FULL: |
| 532 | /* finish operation on full is not an error */ |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 533 | goto unlock; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 534 | case BLK_ZONE_COND_EMPTY: |
Keith Busch | fd78874 | 2020-10-22 08:47:39 -0700 | [diff] [blame] | 535 | ret = null_check_zone_resources(dev, zone); |
| 536 | if (ret != BLK_STS_OK) |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 537 | goto unlock; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 538 | break; |
| 539 | case BLK_ZONE_COND_IMP_OPEN: |
| 540 | dev->nr_zones_imp_open--; |
| 541 | break; |
| 542 | case BLK_ZONE_COND_EXP_OPEN: |
| 543 | dev->nr_zones_exp_open--; |
| 544 | break; |
| 545 | case BLK_ZONE_COND_CLOSED: |
Keith Busch | fd78874 | 2020-10-22 08:47:39 -0700 | [diff] [blame] | 546 | ret = null_check_zone_resources(dev, zone); |
| 547 | if (ret != BLK_STS_OK) |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 548 | goto unlock; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 549 | dev->nr_zones_closed--; |
| 550 | break; |
| 551 | default: |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 552 | ret = BLK_STS_IOERR; |
| 553 | goto unlock; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 554 | } |
| 555 | |
| 556 | zone->cond = BLK_ZONE_COND_FULL; |
| 557 | zone->wp = zone->start + zone->len; |
| 558 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 559 | unlock: |
| 560 | null_unlock_zone_res(dev); |
| 561 | |
| 562 | return ret; |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 563 | } |
| 564 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 565 | static blk_status_t null_reset_zone(struct nullb_device *dev, |
| 566 | struct nullb_zone *zone) |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 567 | { |
| 568 | if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL) |
| 569 | return BLK_STS_IOERR; |
| 570 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 571 | null_lock_zone_res(dev); |
| 572 | |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 573 | switch (zone->cond) { |
| 574 | case BLK_ZONE_COND_EMPTY: |
| 575 | /* reset operation on empty is not an error */ |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 576 | null_unlock_zone_res(dev); |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 577 | return BLK_STS_OK; |
| 578 | case BLK_ZONE_COND_IMP_OPEN: |
| 579 | dev->nr_zones_imp_open--; |
| 580 | break; |
| 581 | case BLK_ZONE_COND_EXP_OPEN: |
| 582 | dev->nr_zones_exp_open--; |
| 583 | break; |
| 584 | case BLK_ZONE_COND_CLOSED: |
| 585 | dev->nr_zones_closed--; |
| 586 | break; |
| 587 | case BLK_ZONE_COND_FULL: |
| 588 | break; |
| 589 | default: |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 590 | null_unlock_zone_res(dev); |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 591 | return BLK_STS_IOERR; |
| 592 | } |
| 593 | |
| 594 | zone->cond = BLK_ZONE_COND_EMPTY; |
| 595 | zone->wp = zone->start; |
| 596 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 597 | null_unlock_zone_res(dev); |
| 598 | |
Damien Le Moal | 0ec4d91 | 2020-11-20 10:55:17 +0900 | [diff] [blame] | 599 | if (dev->memory_backed) |
| 600 | return null_handle_discard(dev, zone->start, zone->len); |
| 601 | |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 602 | return BLK_STS_OK; |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 603 | } |
| 604 | |
Bart Van Assche | ff07a02 | 2022-07-14 11:06:27 -0700 | [diff] [blame] | 605 | static blk_status_t null_zone_mgmt(struct nullb_cmd *cmd, enum req_op op, |
Ajay Joshi | da644b2 | 2019-10-27 23:05:49 +0900 | [diff] [blame] | 606 | sector_t sector) |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 607 | { |
| 608 | struct nullb_device *dev = cmd->nq->dev; |
Damien Le Moal | aa1c09cb6 | 2020-10-29 20:05:00 +0900 | [diff] [blame] | 609 | unsigned int zone_no; |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 610 | struct nullb_zone *zone; |
Damien Le Moal | aa1c09cb6 | 2020-10-29 20:05:00 +0900 | [diff] [blame] | 611 | blk_status_t ret; |
Chaitanya Kulkarni | a61dbfb | 2019-08-01 10:26:38 -0700 | [diff] [blame] | 612 | size_t i; |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 613 | |
Damien Le Moal | aa1c09cb6 | 2020-10-29 20:05:00 +0900 | [diff] [blame] | 614 | if (op == REQ_OP_ZONE_RESET_ALL) { |
Damien Le Moal | f9c9104 | 2020-10-29 20:04:59 +0900 | [diff] [blame] | 615 | for (i = dev->zone_nr_conv; i < dev->nr_zones; i++) { |
| 616 | zone = &dev->zones[i]; |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 617 | null_lock_zone(dev, zone); |
Shin'ichiro Kawasaki | d3a5738 | 2022-12-01 15:10:36 +0900 | [diff] [blame] | 618 | if (zone->cond != BLK_ZONE_COND_EMPTY && |
| 619 | zone->cond != BLK_ZONE_COND_READONLY && |
| 620 | zone->cond != BLK_ZONE_COND_OFFLINE) { |
Damien Le Moal | f9c9104 | 2020-10-29 20:04:59 +0900 | [diff] [blame] | 621 | null_reset_zone(dev, zone); |
| 622 | trace_nullb_zone_op(cmd, i, zone->cond); |
| 623 | } |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 624 | null_unlock_zone(dev, zone); |
Damien Le Moal | f9c9104 | 2020-10-29 20:04:59 +0900 | [diff] [blame] | 625 | } |
| 626 | return BLK_STS_OK; |
Damien Le Moal | aa1c09cb6 | 2020-10-29 20:05:00 +0900 | [diff] [blame] | 627 | } |
| 628 | |
| 629 | zone_no = null_zone_no(dev, sector); |
| 630 | zone = &dev->zones[zone_no]; |
| 631 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 632 | null_lock_zone(dev, zone); |
Damien Le Moal | aa1c09cb6 | 2020-10-29 20:05:00 +0900 | [diff] [blame] | 633 | |
Shin'ichiro Kawasaki | d3a5738 | 2022-12-01 15:10:36 +0900 | [diff] [blame] | 634 | if (zone->cond == BLK_ZONE_COND_READONLY || |
| 635 | zone->cond == BLK_ZONE_COND_OFFLINE) { |
| 636 | ret = BLK_STS_IOERR; |
| 637 | goto unlock; |
| 638 | } |
| 639 | |
Damien Le Moal | aa1c09cb6 | 2020-10-29 20:05:00 +0900 | [diff] [blame] | 640 | switch (op) { |
Chaitanya Kulkarni | a61dbfb | 2019-08-01 10:26:38 -0700 | [diff] [blame] | 641 | case REQ_OP_ZONE_RESET: |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 642 | ret = null_reset_zone(dev, zone); |
Chaitanya Kulkarni | a61dbfb | 2019-08-01 10:26:38 -0700 | [diff] [blame] | 643 | break; |
Ajay Joshi | da644b2 | 2019-10-27 23:05:49 +0900 | [diff] [blame] | 644 | case REQ_OP_ZONE_OPEN: |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 645 | ret = null_open_zone(dev, zone); |
Ajay Joshi | da644b2 | 2019-10-27 23:05:49 +0900 | [diff] [blame] | 646 | break; |
| 647 | case REQ_OP_ZONE_CLOSE: |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 648 | ret = null_close_zone(dev, zone); |
Ajay Joshi | da644b2 | 2019-10-27 23:05:49 +0900 | [diff] [blame] | 649 | break; |
| 650 | case REQ_OP_ZONE_FINISH: |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 651 | ret = null_finish_zone(dev, zone); |
Ajay Joshi | da644b2 | 2019-10-27 23:05:49 +0900 | [diff] [blame] | 652 | break; |
Chaitanya Kulkarni | a61dbfb | 2019-08-01 10:26:38 -0700 | [diff] [blame] | 653 | default: |
Damien Le Moal | aa1c09cb6 | 2020-10-29 20:05:00 +0900 | [diff] [blame] | 654 | ret = BLK_STS_NOTSUPP; |
| 655 | break; |
Masato Suzuki | ea2c18e | 2018-10-30 16:14:05 +0900 | [diff] [blame] | 656 | } |
Chaitanya Kulkarni | 766c329 | 2020-03-25 10:49:56 -0700 | [diff] [blame] | 657 | |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 658 | if (ret == BLK_STS_OK) |
| 659 | trace_nullb_zone_op(cmd, zone_no, zone->cond); |
| 660 | |
Shin'ichiro Kawasaki | d3a5738 | 2022-12-01 15:10:36 +0900 | [diff] [blame] | 661 | unlock: |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 662 | null_unlock_zone(dev, zone); |
Damien Le Moal | aa1c09cb6 | 2020-10-29 20:05:00 +0900 | [diff] [blame] | 663 | |
Niklas Cassel | dc4d137e | 2020-08-28 12:54:00 +0200 | [diff] [blame] | 664 | return ret; |
Chaitanya Kulkarni | fceb5d1 | 2019-08-22 21:45:18 -0700 | [diff] [blame] | 665 | } |
| 666 | |
Bart Van Assche | ff07a02 | 2022-07-14 11:06:27 -0700 | [diff] [blame] | 667 | blk_status_t null_process_zoned_cmd(struct nullb_cmd *cmd, enum req_op op, |
Damien Le Moal | 9dd44c7 | 2020-04-23 12:02:37 +0900 | [diff] [blame] | 668 | sector_t sector, sector_t nr_sectors) |
Chaitanya Kulkarni | fceb5d1 | 2019-08-22 21:45:18 -0700 | [diff] [blame] | 669 | { |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 670 | struct nullb_device *dev; |
| 671 | struct nullb_zone *zone; |
Damien Le Moal | aa1c09cb6 | 2020-10-29 20:05:00 +0900 | [diff] [blame] | 672 | blk_status_t sts; |
Kanchan Joshi | 35bc10b | 2020-09-28 15:25:49 +0530 | [diff] [blame] | 673 | |
Chaitanya Kulkarni | fceb5d1 | 2019-08-22 21:45:18 -0700 | [diff] [blame] | 674 | switch (op) { |
| 675 | case REQ_OP_WRITE: |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 676 | return null_zone_write(cmd, sector, nr_sectors, false); |
Damien Le Moal | e0489ed | 2020-05-12 17:55:52 +0900 | [diff] [blame] | 677 | case REQ_OP_ZONE_APPEND: |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 678 | return null_zone_write(cmd, sector, nr_sectors, true); |
Chaitanya Kulkarni | fceb5d1 | 2019-08-22 21:45:18 -0700 | [diff] [blame] | 679 | case REQ_OP_ZONE_RESET: |
| 680 | case REQ_OP_ZONE_RESET_ALL: |
Ajay Joshi | da644b2 | 2019-10-27 23:05:49 +0900 | [diff] [blame] | 681 | case REQ_OP_ZONE_OPEN: |
| 682 | case REQ_OP_ZONE_CLOSE: |
| 683 | case REQ_OP_ZONE_FINISH: |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 684 | return null_zone_mgmt(cmd, op, sector); |
Chaitanya Kulkarni | fceb5d1 | 2019-08-22 21:45:18 -0700 | [diff] [blame] | 685 | default: |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 686 | dev = cmd->nq->dev; |
| 687 | zone = &dev->zones[null_zone_no(dev, sector)]; |
Shin'ichiro Kawasaki | d3a5738 | 2022-12-01 15:10:36 +0900 | [diff] [blame] | 688 | if (zone->cond == BLK_ZONE_COND_OFFLINE) |
| 689 | return BLK_STS_IOERR; |
Kanchan Joshi | 35bc10b | 2020-09-28 15:25:49 +0530 | [diff] [blame] | 690 | |
Damien Le Moal | 2b8b7ed | 2020-11-20 10:55:14 +0900 | [diff] [blame] | 691 | null_lock_zone(dev, zone); |
| 692 | sts = null_process_cmd(cmd, op, sector, nr_sectors); |
| 693 | null_unlock_zone(dev, zone); |
| 694 | return sts; |
| 695 | } |
Matias Bjørling | ca4b2a0 | 2018-07-06 19:38:39 +0200 | [diff] [blame] | 696 | } |
Shin'ichiro Kawasaki | d3a5738 | 2022-12-01 15:10:36 +0900 | [diff] [blame] | 697 | |
| 698 | /* |
| 699 | * Set a zone in the read-only or offline condition. |
| 700 | */ |
| 701 | static void null_set_zone_cond(struct nullb_device *dev, |
| 702 | struct nullb_zone *zone, enum blk_zone_cond cond) |
| 703 | { |
| 704 | if (WARN_ON_ONCE(cond != BLK_ZONE_COND_READONLY && |
| 705 | cond != BLK_ZONE_COND_OFFLINE)) |
| 706 | return; |
| 707 | |
| 708 | null_lock_zone(dev, zone); |
| 709 | |
| 710 | /* |
| 711 | * If the read-only condition is requested again to zones already in |
| 712 | * read-only condition, restore back normal empty condition. Do the same |
| 713 | * if the offline condition is requested for offline zones. Otherwise, |
| 714 | * set the specified zone condition to the zones. Finish the zones |
| 715 | * beforehand to free up zone resources. |
| 716 | */ |
| 717 | if (zone->cond == cond) { |
| 718 | zone->cond = BLK_ZONE_COND_EMPTY; |
| 719 | zone->wp = zone->start; |
| 720 | if (dev->memory_backed) |
| 721 | null_handle_discard(dev, zone->start, zone->len); |
| 722 | } else { |
| 723 | if (zone->cond != BLK_ZONE_COND_READONLY && |
| 724 | zone->cond != BLK_ZONE_COND_OFFLINE) |
| 725 | null_finish_zone(dev, zone); |
| 726 | zone->cond = cond; |
| 727 | zone->wp = (sector_t)-1; |
| 728 | } |
| 729 | |
| 730 | null_unlock_zone(dev, zone); |
| 731 | } |
| 732 | |
| 733 | /* |
| 734 | * Identify a zone from the sector written to configfs file. Then set zone |
| 735 | * condition to the zone. |
| 736 | */ |
| 737 | ssize_t zone_cond_store(struct nullb_device *dev, const char *page, |
| 738 | size_t count, enum blk_zone_cond cond) |
| 739 | { |
| 740 | unsigned long long sector; |
| 741 | unsigned int zone_no; |
| 742 | int ret; |
| 743 | |
| 744 | if (!dev->zoned) { |
| 745 | pr_err("null_blk device is not zoned\n"); |
| 746 | return -EINVAL; |
| 747 | } |
| 748 | |
| 749 | if (!dev->zones) { |
| 750 | pr_err("null_blk device is not yet powered\n"); |
| 751 | return -EINVAL; |
| 752 | } |
| 753 | |
| 754 | ret = kstrtoull(page, 0, §or); |
| 755 | if (ret < 0) |
| 756 | return ret; |
| 757 | |
| 758 | zone_no = null_zone_no(dev, sector); |
| 759 | if (zone_no >= dev->nr_zones) { |
| 760 | pr_err("Sector out of range\n"); |
| 761 | return -EINVAL; |
| 762 | } |
| 763 | |
| 764 | if (dev->zones[zone_no].type == BLK_ZONE_TYPE_CONVENTIONAL) { |
| 765 | pr_err("Can not change condition of conventional zones\n"); |
| 766 | return -EINVAL; |
| 767 | } |
| 768 | |
| 769 | null_set_zone_cond(dev, &dev->zones[zone_no], cond); |
| 770 | |
| 771 | return count; |
| 772 | } |