Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 2 | /* |
| 3 | * Functions related to sysfs handling |
| 4 | */ |
| 5 | #include <linux/kernel.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 6 | #include <linux/slab.h> |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 7 | #include <linux/module.h> |
| 8 | #include <linux/bio.h> |
| 9 | #include <linux/blkdev.h> |
Tejun Heo | 66114ca | 2015-05-22 17:13:32 -0400 | [diff] [blame] | 10 | #include <linux/backing-dev.h> |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 11 | #include <linux/blktrace_api.h> |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 12 | #include <linux/blk-mq.h> |
Tejun Heo | eea8f41 | 2015-05-22 17:13:17 -0400 | [diff] [blame] | 13 | #include <linux/blk-cgroup.h> |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 14 | |
| 15 | #include "blk.h" |
Ming Lei | 3edcc0c | 2013-12-26 21:31:38 +0800 | [diff] [blame] | 16 | #include "blk-mq.h" |
Omar Sandoval | d173a25 | 2017-05-04 00:31:30 -0700 | [diff] [blame] | 17 | #include "blk-mq-debugfs.h" |
Jens Axboe | 87760e5 | 2016-11-09 12:38:14 -0700 | [diff] [blame] | 18 | #include "blk-wbt.h" |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 19 | |
| 20 | struct queue_sysfs_entry { |
| 21 | struct attribute attr; |
| 22 | ssize_t (*show)(struct request_queue *, char *); |
| 23 | ssize_t (*store)(struct request_queue *, const char *, size_t); |
| 24 | }; |
| 25 | |
| 26 | static ssize_t |
Xiaotian Feng | 9cb308c | 2009-07-17 15:26:26 +0800 | [diff] [blame] | 27 | queue_var_show(unsigned long var, char *page) |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 28 | { |
Xiaotian Feng | 9cb308c | 2009-07-17 15:26:26 +0800 | [diff] [blame] | 29 | return sprintf(page, "%lu\n", var); |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 30 | } |
| 31 | |
| 32 | static ssize_t |
| 33 | queue_var_store(unsigned long *var, const char *page, size_t count) |
| 34 | { |
Dave Reisner | b1f3b64 | 2012-09-08 11:55:45 -0400 | [diff] [blame] | 35 | int err; |
| 36 | unsigned long v; |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 37 | |
Jingoo Han | ed751e6 | 2013-09-11 14:20:08 -0700 | [diff] [blame] | 38 | err = kstrtoul(page, 10, &v); |
Dave Reisner | b1f3b64 | 2012-09-08 11:55:45 -0400 | [diff] [blame] | 39 | if (err || v > UINT_MAX) |
| 40 | return -EINVAL; |
| 41 | |
| 42 | *var = v; |
| 43 | |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 44 | return count; |
| 45 | } |
| 46 | |
Jens Axboe | 80e091d | 2016-11-28 09:22:47 -0700 | [diff] [blame] | 47 | static ssize_t queue_var_store64(s64 *var, const char *page) |
Jens Axboe | 87760e5 | 2016-11-09 12:38:14 -0700 | [diff] [blame] | 48 | { |
| 49 | int err; |
Jens Axboe | 80e091d | 2016-11-28 09:22:47 -0700 | [diff] [blame] | 50 | s64 v; |
Jens Axboe | 87760e5 | 2016-11-09 12:38:14 -0700 | [diff] [blame] | 51 | |
Jens Axboe | 80e091d | 2016-11-28 09:22:47 -0700 | [diff] [blame] | 52 | err = kstrtos64(page, 10, &v); |
Jens Axboe | 87760e5 | 2016-11-09 12:38:14 -0700 | [diff] [blame] | 53 | if (err < 0) |
| 54 | return err; |
| 55 | |
| 56 | *var = v; |
| 57 | return 0; |
| 58 | } |
| 59 | |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 60 | static ssize_t queue_requests_show(struct request_queue *q, char *page) |
| 61 | { |
| 62 | return queue_var_show(q->nr_requests, (page)); |
| 63 | } |
| 64 | |
| 65 | static ssize_t |
| 66 | queue_requests_store(struct request_queue *q, const char *page, size_t count) |
| 67 | { |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 68 | unsigned long nr; |
Jens Axboe | e3a2b3f | 2014-05-20 11:49:02 -0600 | [diff] [blame] | 69 | int ret, err; |
Jens Axboe | b8a9ae7 | 2009-09-11 22:44:29 +0200 | [diff] [blame] | 70 | |
Jens Axboe | e3a2b3f | 2014-05-20 11:49:02 -0600 | [diff] [blame] | 71 | if (!q->request_fn && !q->mq_ops) |
Jens Axboe | b8a9ae7 | 2009-09-11 22:44:29 +0200 | [diff] [blame] | 72 | return -EINVAL; |
| 73 | |
| 74 | ret = queue_var_store(&nr, page, count); |
Dave Reisner | b1f3b64 | 2012-09-08 11:55:45 -0400 | [diff] [blame] | 75 | if (ret < 0) |
| 76 | return ret; |
| 77 | |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 78 | if (nr < BLKDEV_MIN_RQ) |
| 79 | nr = BLKDEV_MIN_RQ; |
| 80 | |
Jens Axboe | e3a2b3f | 2014-05-20 11:49:02 -0600 | [diff] [blame] | 81 | if (q->request_fn) |
| 82 | err = blk_update_nr_requests(q, nr); |
| 83 | else |
| 84 | err = blk_mq_update_nr_requests(q, nr); |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 85 | |
Jens Axboe | e3a2b3f | 2014-05-20 11:49:02 -0600 | [diff] [blame] | 86 | if (err) |
| 87 | return err; |
Tejun Heo | a051661 | 2012-06-26 15:05:44 -0700 | [diff] [blame] | 88 | |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 89 | return ret; |
| 90 | } |
| 91 | |
| 92 | static ssize_t queue_ra_show(struct request_queue *q, char *page) |
| 93 | { |
Jan Kara | dc3b17c | 2017-02-02 15:56:50 +0100 | [diff] [blame] | 94 | unsigned long ra_kb = q->backing_dev_info->ra_pages << |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 95 | (PAGE_SHIFT - 10); |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 96 | |
| 97 | return queue_var_show(ra_kb, (page)); |
| 98 | } |
| 99 | |
| 100 | static ssize_t |
| 101 | queue_ra_store(struct request_queue *q, const char *page, size_t count) |
| 102 | { |
| 103 | unsigned long ra_kb; |
| 104 | ssize_t ret = queue_var_store(&ra_kb, page, count); |
| 105 | |
Dave Reisner | b1f3b64 | 2012-09-08 11:55:45 -0400 | [diff] [blame] | 106 | if (ret < 0) |
| 107 | return ret; |
| 108 | |
Jan Kara | dc3b17c | 2017-02-02 15:56:50 +0100 | [diff] [blame] | 109 | q->backing_dev_info->ra_pages = ra_kb >> (PAGE_SHIFT - 10); |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 110 | |
| 111 | return ret; |
| 112 | } |
| 113 | |
| 114 | static ssize_t queue_max_sectors_show(struct request_queue *q, char *page) |
| 115 | { |
Martin K. Petersen | ae03bf6 | 2009-05-22 17:17:50 -0400 | [diff] [blame] | 116 | int max_sectors_kb = queue_max_sectors(q) >> 1; |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 117 | |
| 118 | return queue_var_show(max_sectors_kb, (page)); |
| 119 | } |
| 120 | |
Martin K. Petersen | c77a571 | 2010-03-10 00:48:33 -0500 | [diff] [blame] | 121 | static ssize_t queue_max_segments_show(struct request_queue *q, char *page) |
| 122 | { |
| 123 | return queue_var_show(queue_max_segments(q), (page)); |
| 124 | } |
| 125 | |
Christoph Hellwig | 1e73973 | 2017-02-08 14:46:49 +0100 | [diff] [blame] | 126 | static ssize_t queue_max_discard_segments_show(struct request_queue *q, |
| 127 | char *page) |
| 128 | { |
| 129 | return queue_var_show(queue_max_discard_segments(q), (page)); |
| 130 | } |
| 131 | |
Martin K. Petersen | 13f05c8 | 2010-09-10 20:50:10 +0200 | [diff] [blame] | 132 | static ssize_t queue_max_integrity_segments_show(struct request_queue *q, char *page) |
| 133 | { |
| 134 | return queue_var_show(q->limits.max_integrity_segments, (page)); |
| 135 | } |
| 136 | |
Martin K. Petersen | c77a571 | 2010-03-10 00:48:33 -0500 | [diff] [blame] | 137 | static ssize_t queue_max_segment_size_show(struct request_queue *q, char *page) |
| 138 | { |
Martin K. Petersen | e692cb6 | 2010-12-01 19:41:49 +0100 | [diff] [blame] | 139 | if (blk_queue_cluster(q)) |
Martin K. Petersen | c77a571 | 2010-03-10 00:48:33 -0500 | [diff] [blame] | 140 | return queue_var_show(queue_max_segment_size(q), (page)); |
| 141 | |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 142 | return queue_var_show(PAGE_SIZE, (page)); |
Martin K. Petersen | c77a571 | 2010-03-10 00:48:33 -0500 | [diff] [blame] | 143 | } |
| 144 | |
Martin K. Petersen | e1defc4 | 2009-05-22 17:17:49 -0400 | [diff] [blame] | 145 | static ssize_t queue_logical_block_size_show(struct request_queue *q, char *page) |
Martin K. Petersen | e68b903 | 2008-01-29 19:14:08 +0100 | [diff] [blame] | 146 | { |
Martin K. Petersen | e1defc4 | 2009-05-22 17:17:49 -0400 | [diff] [blame] | 147 | return queue_var_show(queue_logical_block_size(q), page); |
Martin K. Petersen | e68b903 | 2008-01-29 19:14:08 +0100 | [diff] [blame] | 148 | } |
| 149 | |
Martin K. Petersen | c72758f | 2009-05-22 17:17:53 -0400 | [diff] [blame] | 150 | static ssize_t queue_physical_block_size_show(struct request_queue *q, char *page) |
| 151 | { |
| 152 | return queue_var_show(queue_physical_block_size(q), page); |
| 153 | } |
| 154 | |
Hannes Reinecke | 87caf97 | 2016-10-18 15:40:30 +0900 | [diff] [blame] | 155 | static ssize_t queue_chunk_sectors_show(struct request_queue *q, char *page) |
| 156 | { |
| 157 | return queue_var_show(q->limits.chunk_sectors, page); |
| 158 | } |
| 159 | |
Martin K. Petersen | c72758f | 2009-05-22 17:17:53 -0400 | [diff] [blame] | 160 | static ssize_t queue_io_min_show(struct request_queue *q, char *page) |
| 161 | { |
| 162 | return queue_var_show(queue_io_min(q), page); |
| 163 | } |
| 164 | |
| 165 | static ssize_t queue_io_opt_show(struct request_queue *q, char *page) |
| 166 | { |
| 167 | return queue_var_show(queue_io_opt(q), page); |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 168 | } |
| 169 | |
Martin K. Petersen | 86b3728 | 2009-11-10 11:50:21 +0100 | [diff] [blame] | 170 | static ssize_t queue_discard_granularity_show(struct request_queue *q, char *page) |
| 171 | { |
| 172 | return queue_var_show(q->limits.discard_granularity, page); |
| 173 | } |
| 174 | |
Jens Axboe | 0034af0 | 2015-07-16 09:14:26 -0600 | [diff] [blame] | 175 | static ssize_t queue_discard_max_hw_show(struct request_queue *q, char *page) |
| 176 | { |
Jens Axboe | 0034af0 | 2015-07-16 09:14:26 -0600 | [diff] [blame] | 177 | |
Alan | 18f922d0 | 2016-02-17 14:15:30 +0000 | [diff] [blame] | 178 | return sprintf(page, "%llu\n", |
| 179 | (unsigned long long)q->limits.max_hw_discard_sectors << 9); |
Jens Axboe | 0034af0 | 2015-07-16 09:14:26 -0600 | [diff] [blame] | 180 | } |
| 181 | |
Martin K. Petersen | 86b3728 | 2009-11-10 11:50:21 +0100 | [diff] [blame] | 182 | static ssize_t queue_discard_max_show(struct request_queue *q, char *page) |
| 183 | { |
Martin K. Petersen | a934a00 | 2011-05-18 10:37:35 +0200 | [diff] [blame] | 184 | return sprintf(page, "%llu\n", |
| 185 | (unsigned long long)q->limits.max_discard_sectors << 9); |
Martin K. Petersen | 86b3728 | 2009-11-10 11:50:21 +0100 | [diff] [blame] | 186 | } |
| 187 | |
Jens Axboe | 0034af0 | 2015-07-16 09:14:26 -0600 | [diff] [blame] | 188 | static ssize_t queue_discard_max_store(struct request_queue *q, |
| 189 | const char *page, size_t count) |
| 190 | { |
| 191 | unsigned long max_discard; |
| 192 | ssize_t ret = queue_var_store(&max_discard, page, count); |
| 193 | |
| 194 | if (ret < 0) |
| 195 | return ret; |
| 196 | |
| 197 | if (max_discard & (q->limits.discard_granularity - 1)) |
| 198 | return -EINVAL; |
| 199 | |
| 200 | max_discard >>= 9; |
| 201 | if (max_discard > UINT_MAX) |
| 202 | return -EINVAL; |
| 203 | |
| 204 | if (max_discard > q->limits.max_hw_discard_sectors) |
| 205 | max_discard = q->limits.max_hw_discard_sectors; |
| 206 | |
| 207 | q->limits.max_discard_sectors = max_discard; |
| 208 | return ret; |
| 209 | } |
| 210 | |
Martin K. Petersen | 98262f2 | 2009-12-03 09:24:48 +0100 | [diff] [blame] | 211 | static ssize_t queue_discard_zeroes_data_show(struct request_queue *q, char *page) |
| 212 | { |
Christoph Hellwig | 48920ff | 2017-04-05 19:21:23 +0200 | [diff] [blame] | 213 | return queue_var_show(0, page); |
Martin K. Petersen | 98262f2 | 2009-12-03 09:24:48 +0100 | [diff] [blame] | 214 | } |
| 215 | |
Martin K. Petersen | 4363ac7 | 2012-09-18 12:19:27 -0400 | [diff] [blame] | 216 | static ssize_t queue_write_same_max_show(struct request_queue *q, char *page) |
| 217 | { |
| 218 | return sprintf(page, "%llu\n", |
| 219 | (unsigned long long)q->limits.max_write_same_sectors << 9); |
| 220 | } |
| 221 | |
Chaitanya Kulkarni | a6f0788 | 2016-11-30 12:28:59 -0800 | [diff] [blame] | 222 | static ssize_t queue_write_zeroes_max_show(struct request_queue *q, char *page) |
| 223 | { |
| 224 | return sprintf(page, "%llu\n", |
| 225 | (unsigned long long)q->limits.max_write_zeroes_sectors << 9); |
| 226 | } |
Martin K. Petersen | 4363ac7 | 2012-09-18 12:19:27 -0400 | [diff] [blame] | 227 | |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 228 | static ssize_t |
| 229 | queue_max_sectors_store(struct request_queue *q, const char *page, size_t count) |
| 230 | { |
| 231 | unsigned long max_sectors_kb, |
Martin K. Petersen | ae03bf6 | 2009-05-22 17:17:50 -0400 | [diff] [blame] | 232 | max_hw_sectors_kb = queue_max_hw_sectors(q) >> 1, |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 233 | page_kb = 1 << (PAGE_SHIFT - 10); |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 234 | ssize_t ret = queue_var_store(&max_sectors_kb, page, count); |
| 235 | |
Dave Reisner | b1f3b64 | 2012-09-08 11:55:45 -0400 | [diff] [blame] | 236 | if (ret < 0) |
| 237 | return ret; |
| 238 | |
Martin K. Petersen | ca369d5 | 2015-11-13 16:46:48 -0500 | [diff] [blame] | 239 | max_hw_sectors_kb = min_not_zero(max_hw_sectors_kb, (unsigned long) |
| 240 | q->limits.max_dev_sectors >> 1); |
| 241 | |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 242 | if (max_sectors_kb > max_hw_sectors_kb || max_sectors_kb < page_kb) |
| 243 | return -EINVAL; |
Wu Fengguang | 7c23951 | 2008-11-25 09:08:39 +0100 | [diff] [blame] | 244 | |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 245 | spin_lock_irq(q->queue_lock); |
Nikanth Karthikesan | c295fc0 | 2009-09-01 22:40:15 +0200 | [diff] [blame] | 246 | q->limits.max_sectors = max_sectors_kb << 1; |
Jan Kara | dc3b17c | 2017-02-02 15:56:50 +0100 | [diff] [blame] | 247 | q->backing_dev_info->io_pages = max_sectors_kb >> (PAGE_SHIFT - 10); |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 248 | spin_unlock_irq(q->queue_lock); |
| 249 | |
| 250 | return ret; |
| 251 | } |
| 252 | |
| 253 | static ssize_t queue_max_hw_sectors_show(struct request_queue *q, char *page) |
| 254 | { |
Martin K. Petersen | ae03bf6 | 2009-05-22 17:17:50 -0400 | [diff] [blame] | 255 | int max_hw_sectors_kb = queue_max_hw_sectors(q) >> 1; |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 256 | |
| 257 | return queue_var_show(max_hw_sectors_kb, (page)); |
| 258 | } |
| 259 | |
Jens Axboe | 956bcb7 | 2010-08-07 18:13:50 +0200 | [diff] [blame] | 260 | #define QUEUE_SYSFS_BIT_FNS(name, flag, neg) \ |
| 261 | static ssize_t \ |
| 262 | queue_show_##name(struct request_queue *q, char *page) \ |
| 263 | { \ |
| 264 | int bit; \ |
| 265 | bit = test_bit(QUEUE_FLAG_##flag, &q->queue_flags); \ |
| 266 | return queue_var_show(neg ? !bit : bit, page); \ |
| 267 | } \ |
| 268 | static ssize_t \ |
| 269 | queue_store_##name(struct request_queue *q, const char *page, size_t count) \ |
| 270 | { \ |
| 271 | unsigned long val; \ |
| 272 | ssize_t ret; \ |
| 273 | ret = queue_var_store(&val, page, count); \ |
Arnd Bergmann | c678ef5 | 2013-04-03 21:53:57 +0200 | [diff] [blame] | 274 | if (ret < 0) \ |
| 275 | return ret; \ |
Jens Axboe | 956bcb7 | 2010-08-07 18:13:50 +0200 | [diff] [blame] | 276 | if (neg) \ |
| 277 | val = !val; \ |
| 278 | \ |
Jens Axboe | 956bcb7 | 2010-08-07 18:13:50 +0200 | [diff] [blame] | 279 | if (val) \ |
Bart Van Assche | 8814ce8 | 2018-03-07 17:10:04 -0800 | [diff] [blame] | 280 | blk_queue_flag_set(QUEUE_FLAG_##flag, q); \ |
Jens Axboe | 956bcb7 | 2010-08-07 18:13:50 +0200 | [diff] [blame] | 281 | else \ |
Bart Van Assche | 8814ce8 | 2018-03-07 17:10:04 -0800 | [diff] [blame] | 282 | blk_queue_flag_clear(QUEUE_FLAG_##flag, q); \ |
Jens Axboe | 956bcb7 | 2010-08-07 18:13:50 +0200 | [diff] [blame] | 283 | return ret; \ |
Bartlomiej Zolnierkiewicz | 1308835f | 2009-01-07 12:22:39 +0100 | [diff] [blame] | 284 | } |
| 285 | |
Jens Axboe | 956bcb7 | 2010-08-07 18:13:50 +0200 | [diff] [blame] | 286 | QUEUE_SYSFS_BIT_FNS(nonrot, NONROT, 1); |
| 287 | QUEUE_SYSFS_BIT_FNS(random, ADD_RANDOM, 0); |
| 288 | QUEUE_SYSFS_BIT_FNS(iostats, IO_STAT, 0); |
| 289 | #undef QUEUE_SYSFS_BIT_FNS |
Bartlomiej Zolnierkiewicz | 1308835f | 2009-01-07 12:22:39 +0100 | [diff] [blame] | 290 | |
Damien Le Moal | 797476b | 2016-10-18 15:40:29 +0900 | [diff] [blame] | 291 | static ssize_t queue_zoned_show(struct request_queue *q, char *page) |
| 292 | { |
| 293 | switch (blk_queue_zoned_model(q)) { |
| 294 | case BLK_ZONED_HA: |
| 295 | return sprintf(page, "host-aware\n"); |
| 296 | case BLK_ZONED_HM: |
| 297 | return sprintf(page, "host-managed\n"); |
| 298 | default: |
| 299 | return sprintf(page, "none\n"); |
| 300 | } |
| 301 | } |
| 302 | |
Alan D. Brunelle | ac9fafa | 2008-04-29 14:44:19 +0200 | [diff] [blame] | 303 | static ssize_t queue_nomerges_show(struct request_queue *q, char *page) |
| 304 | { |
Alan D. Brunelle | 488991e | 2010-01-29 09:04:08 +0100 | [diff] [blame] | 305 | return queue_var_show((blk_queue_nomerges(q) << 1) | |
| 306 | blk_queue_noxmerges(q), page); |
Alan D. Brunelle | ac9fafa | 2008-04-29 14:44:19 +0200 | [diff] [blame] | 307 | } |
| 308 | |
| 309 | static ssize_t queue_nomerges_store(struct request_queue *q, const char *page, |
| 310 | size_t count) |
| 311 | { |
| 312 | unsigned long nm; |
| 313 | ssize_t ret = queue_var_store(&nm, page, count); |
| 314 | |
Dave Reisner | b1f3b64 | 2012-09-08 11:55:45 -0400 | [diff] [blame] | 315 | if (ret < 0) |
| 316 | return ret; |
| 317 | |
Jens Axboe | bf0f970 | 2008-05-07 09:09:39 +0200 | [diff] [blame] | 318 | spin_lock_irq(q->queue_lock); |
Alan D. Brunelle | 488991e | 2010-01-29 09:04:08 +0100 | [diff] [blame] | 319 | queue_flag_clear(QUEUE_FLAG_NOMERGES, q); |
| 320 | queue_flag_clear(QUEUE_FLAG_NOXMERGES, q); |
| 321 | if (nm == 2) |
Jens Axboe | bf0f970 | 2008-05-07 09:09:39 +0200 | [diff] [blame] | 322 | queue_flag_set(QUEUE_FLAG_NOMERGES, q); |
Alan D. Brunelle | 488991e | 2010-01-29 09:04:08 +0100 | [diff] [blame] | 323 | else if (nm) |
| 324 | queue_flag_set(QUEUE_FLAG_NOXMERGES, q); |
Jens Axboe | bf0f970 | 2008-05-07 09:09:39 +0200 | [diff] [blame] | 325 | spin_unlock_irq(q->queue_lock); |
Bartlomiej Zolnierkiewicz | 1308835f | 2009-01-07 12:22:39 +0100 | [diff] [blame] | 326 | |
Alan D. Brunelle | ac9fafa | 2008-04-29 14:44:19 +0200 | [diff] [blame] | 327 | return ret; |
| 328 | } |
| 329 | |
Jens Axboe | c7c22e4 | 2008-09-13 20:26:01 +0200 | [diff] [blame] | 330 | static ssize_t queue_rq_affinity_show(struct request_queue *q, char *page) |
| 331 | { |
Xiaotian Feng | 9cb308c | 2009-07-17 15:26:26 +0800 | [diff] [blame] | 332 | bool set = test_bit(QUEUE_FLAG_SAME_COMP, &q->queue_flags); |
Dan Williams | 5757a6d | 2011-07-23 20:44:25 +0200 | [diff] [blame] | 333 | bool force = test_bit(QUEUE_FLAG_SAME_FORCE, &q->queue_flags); |
Jens Axboe | c7c22e4 | 2008-09-13 20:26:01 +0200 | [diff] [blame] | 334 | |
Dan Williams | 5757a6d | 2011-07-23 20:44:25 +0200 | [diff] [blame] | 335 | return queue_var_show(set << force, page); |
Jens Axboe | c7c22e4 | 2008-09-13 20:26:01 +0200 | [diff] [blame] | 336 | } |
| 337 | |
| 338 | static ssize_t |
| 339 | queue_rq_affinity_store(struct request_queue *q, const char *page, size_t count) |
| 340 | { |
| 341 | ssize_t ret = -EINVAL; |
Christoph Hellwig | 0a06ff0 | 2013-11-14 14:32:07 -0800 | [diff] [blame] | 342 | #ifdef CONFIG_SMP |
Jens Axboe | c7c22e4 | 2008-09-13 20:26:01 +0200 | [diff] [blame] | 343 | unsigned long val; |
| 344 | |
| 345 | ret = queue_var_store(&val, page, count); |
Dave Reisner | b1f3b64 | 2012-09-08 11:55:45 -0400 | [diff] [blame] | 346 | if (ret < 0) |
| 347 | return ret; |
| 348 | |
Jens Axboe | c7c22e4 | 2008-09-13 20:26:01 +0200 | [diff] [blame] | 349 | spin_lock_irq(q->queue_lock); |
Eric Seppanen | e8037d4 | 2011-08-23 21:25:12 +0200 | [diff] [blame] | 350 | if (val == 2) { |
Jens Axboe | c7c22e4 | 2008-09-13 20:26:01 +0200 | [diff] [blame] | 351 | queue_flag_set(QUEUE_FLAG_SAME_COMP, q); |
Eric Seppanen | e8037d4 | 2011-08-23 21:25:12 +0200 | [diff] [blame] | 352 | queue_flag_set(QUEUE_FLAG_SAME_FORCE, q); |
| 353 | } else if (val == 1) { |
| 354 | queue_flag_set(QUEUE_FLAG_SAME_COMP, q); |
| 355 | queue_flag_clear(QUEUE_FLAG_SAME_FORCE, q); |
| 356 | } else if (val == 0) { |
Dan Williams | 5757a6d | 2011-07-23 20:44:25 +0200 | [diff] [blame] | 357 | queue_flag_clear(QUEUE_FLAG_SAME_COMP, q); |
| 358 | queue_flag_clear(QUEUE_FLAG_SAME_FORCE, q); |
| 359 | } |
Jens Axboe | c7c22e4 | 2008-09-13 20:26:01 +0200 | [diff] [blame] | 360 | spin_unlock_irq(q->queue_lock); |
| 361 | #endif |
| 362 | return ret; |
| 363 | } |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 364 | |
Jens Axboe | 06426ad | 2016-11-14 13:01:59 -0700 | [diff] [blame] | 365 | static ssize_t queue_poll_delay_show(struct request_queue *q, char *page) |
| 366 | { |
Jens Axboe | 64f1c21 | 2016-11-14 13:03:03 -0700 | [diff] [blame] | 367 | int val; |
| 368 | |
| 369 | if (q->poll_nsec == -1) |
| 370 | val = -1; |
| 371 | else |
| 372 | val = q->poll_nsec / 1000; |
| 373 | |
| 374 | return sprintf(page, "%d\n", val); |
Jens Axboe | 06426ad | 2016-11-14 13:01:59 -0700 | [diff] [blame] | 375 | } |
| 376 | |
| 377 | static ssize_t queue_poll_delay_store(struct request_queue *q, const char *page, |
| 378 | size_t count) |
| 379 | { |
Jens Axboe | 64f1c21 | 2016-11-14 13:03:03 -0700 | [diff] [blame] | 380 | int err, val; |
Jens Axboe | 06426ad | 2016-11-14 13:01:59 -0700 | [diff] [blame] | 381 | |
| 382 | if (!q->mq_ops || !q->mq_ops->poll) |
| 383 | return -EINVAL; |
| 384 | |
Jens Axboe | 64f1c21 | 2016-11-14 13:03:03 -0700 | [diff] [blame] | 385 | err = kstrtoint(page, 10, &val); |
| 386 | if (err < 0) |
| 387 | return err; |
Jens Axboe | 06426ad | 2016-11-14 13:01:59 -0700 | [diff] [blame] | 388 | |
Jens Axboe | 64f1c21 | 2016-11-14 13:03:03 -0700 | [diff] [blame] | 389 | if (val == -1) |
| 390 | q->poll_nsec = -1; |
| 391 | else |
| 392 | q->poll_nsec = val * 1000; |
| 393 | |
| 394 | return count; |
Jens Axboe | 06426ad | 2016-11-14 13:01:59 -0700 | [diff] [blame] | 395 | } |
| 396 | |
Jens Axboe | 05229beed | 2015-11-05 10:44:55 -0700 | [diff] [blame] | 397 | static ssize_t queue_poll_show(struct request_queue *q, char *page) |
| 398 | { |
| 399 | return queue_var_show(test_bit(QUEUE_FLAG_POLL, &q->queue_flags), page); |
| 400 | } |
| 401 | |
| 402 | static ssize_t queue_poll_store(struct request_queue *q, const char *page, |
| 403 | size_t count) |
| 404 | { |
| 405 | unsigned long poll_on; |
| 406 | ssize_t ret; |
| 407 | |
| 408 | if (!q->mq_ops || !q->mq_ops->poll) |
| 409 | return -EINVAL; |
| 410 | |
| 411 | ret = queue_var_store(&poll_on, page, count); |
| 412 | if (ret < 0) |
| 413 | return ret; |
| 414 | |
Jens Axboe | 05229beed | 2015-11-05 10:44:55 -0700 | [diff] [blame] | 415 | if (poll_on) |
Bart Van Assche | 8814ce8 | 2018-03-07 17:10:04 -0800 | [diff] [blame] | 416 | blk_queue_flag_set(QUEUE_FLAG_POLL, q); |
Jens Axboe | 05229beed | 2015-11-05 10:44:55 -0700 | [diff] [blame] | 417 | else |
Bart Van Assche | 8814ce8 | 2018-03-07 17:10:04 -0800 | [diff] [blame] | 418 | blk_queue_flag_clear(QUEUE_FLAG_POLL, q); |
Jens Axboe | 05229beed | 2015-11-05 10:44:55 -0700 | [diff] [blame] | 419 | |
| 420 | return ret; |
| 421 | } |
| 422 | |
Jens Axboe | 87760e5 | 2016-11-09 12:38:14 -0700 | [diff] [blame] | 423 | static ssize_t queue_wb_lat_show(struct request_queue *q, char *page) |
| 424 | { |
| 425 | if (!q->rq_wb) |
| 426 | return -EINVAL; |
| 427 | |
| 428 | return sprintf(page, "%llu\n", div_u64(q->rq_wb->min_lat_nsec, 1000)); |
| 429 | } |
| 430 | |
| 431 | static ssize_t queue_wb_lat_store(struct request_queue *q, const char *page, |
| 432 | size_t count) |
| 433 | { |
Jens Axboe | 80e091d | 2016-11-28 09:22:47 -0700 | [diff] [blame] | 434 | struct rq_wb *rwb; |
Jens Axboe | 87760e5 | 2016-11-09 12:38:14 -0700 | [diff] [blame] | 435 | ssize_t ret; |
Jens Axboe | 80e091d | 2016-11-28 09:22:47 -0700 | [diff] [blame] | 436 | s64 val; |
Jens Axboe | 87760e5 | 2016-11-09 12:38:14 -0700 | [diff] [blame] | 437 | |
Jens Axboe | 87760e5 | 2016-11-09 12:38:14 -0700 | [diff] [blame] | 438 | ret = queue_var_store64(&val, page); |
| 439 | if (ret < 0) |
| 440 | return ret; |
Jens Axboe | d62118b | 2016-11-28 09:40:34 -0700 | [diff] [blame] | 441 | if (val < -1) |
| 442 | return -EINVAL; |
| 443 | |
| 444 | rwb = q->rq_wb; |
| 445 | if (!rwb) { |
| 446 | ret = wbt_init(q); |
| 447 | if (ret) |
| 448 | return ret; |
Jens Axboe | d62118b | 2016-11-28 09:40:34 -0700 | [diff] [blame] | 449 | } |
Jens Axboe | 87760e5 | 2016-11-09 12:38:14 -0700 | [diff] [blame] | 450 | |
weiping zhang | f680474 | 2017-11-23 21:39:40 +0800 | [diff] [blame] | 451 | rwb = q->rq_wb; |
Jens Axboe | 80e091d | 2016-11-28 09:22:47 -0700 | [diff] [blame] | 452 | if (val == -1) |
| 453 | rwb->min_lat_nsec = wbt_default_latency_nsec(q); |
| 454 | else if (val >= 0) |
| 455 | rwb->min_lat_nsec = val * 1000ULL; |
Jens Axboe | d62118b | 2016-11-28 09:40:34 -0700 | [diff] [blame] | 456 | |
| 457 | if (rwb->enable_state == WBT_STATE_ON_DEFAULT) |
| 458 | rwb->enable_state = WBT_STATE_ON_MANUAL; |
Jens Axboe | 80e091d | 2016-11-28 09:22:47 -0700 | [diff] [blame] | 459 | |
| 460 | wbt_update_limits(rwb); |
Jens Axboe | 87760e5 | 2016-11-09 12:38:14 -0700 | [diff] [blame] | 461 | return count; |
| 462 | } |
| 463 | |
Jens Axboe | 93e9d8e | 2016-04-12 12:32:46 -0600 | [diff] [blame] | 464 | static ssize_t queue_wc_show(struct request_queue *q, char *page) |
| 465 | { |
| 466 | if (test_bit(QUEUE_FLAG_WC, &q->queue_flags)) |
| 467 | return sprintf(page, "write back\n"); |
| 468 | |
| 469 | return sprintf(page, "write through\n"); |
| 470 | } |
| 471 | |
| 472 | static ssize_t queue_wc_store(struct request_queue *q, const char *page, |
| 473 | size_t count) |
| 474 | { |
| 475 | int set = -1; |
| 476 | |
| 477 | if (!strncmp(page, "write back", 10)) |
| 478 | set = 1; |
| 479 | else if (!strncmp(page, "write through", 13) || |
| 480 | !strncmp(page, "none", 4)) |
| 481 | set = 0; |
| 482 | |
| 483 | if (set == -1) |
| 484 | return -EINVAL; |
| 485 | |
Jens Axboe | 93e9d8e | 2016-04-12 12:32:46 -0600 | [diff] [blame] | 486 | if (set) |
Bart Van Assche | 8814ce8 | 2018-03-07 17:10:04 -0800 | [diff] [blame] | 487 | blk_queue_flag_set(QUEUE_FLAG_WC, q); |
Jens Axboe | 93e9d8e | 2016-04-12 12:32:46 -0600 | [diff] [blame] | 488 | else |
Bart Van Assche | 8814ce8 | 2018-03-07 17:10:04 -0800 | [diff] [blame] | 489 | blk_queue_flag_clear(QUEUE_FLAG_WC, q); |
Jens Axboe | 93e9d8e | 2016-04-12 12:32:46 -0600 | [diff] [blame] | 490 | |
| 491 | return count; |
| 492 | } |
| 493 | |
Kent Overstreet | 6fcefbe | 2018-05-08 21:33:58 -0400 | [diff] [blame] | 494 | static ssize_t queue_fua_show(struct request_queue *q, char *page) |
| 495 | { |
| 496 | return sprintf(page, "%u\n", test_bit(QUEUE_FLAG_FUA, &q->queue_flags)); |
| 497 | } |
| 498 | |
Yigal Korman | ea6ca60 | 2016-06-23 17:05:51 -0400 | [diff] [blame] | 499 | static ssize_t queue_dax_show(struct request_queue *q, char *page) |
| 500 | { |
| 501 | return queue_var_show(blk_queue_dax(q), page); |
| 502 | } |
| 503 | |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 504 | static struct queue_sysfs_entry queue_requests_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 505 | .attr = {.name = "nr_requests", .mode = 0644 }, |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 506 | .show = queue_requests_show, |
| 507 | .store = queue_requests_store, |
| 508 | }; |
| 509 | |
| 510 | static struct queue_sysfs_entry queue_ra_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 511 | .attr = {.name = "read_ahead_kb", .mode = 0644 }, |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 512 | .show = queue_ra_show, |
| 513 | .store = queue_ra_store, |
| 514 | }; |
| 515 | |
| 516 | static struct queue_sysfs_entry queue_max_sectors_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 517 | .attr = {.name = "max_sectors_kb", .mode = 0644 }, |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 518 | .show = queue_max_sectors_show, |
| 519 | .store = queue_max_sectors_store, |
| 520 | }; |
| 521 | |
| 522 | static struct queue_sysfs_entry queue_max_hw_sectors_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 523 | .attr = {.name = "max_hw_sectors_kb", .mode = 0444 }, |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 524 | .show = queue_max_hw_sectors_show, |
| 525 | }; |
| 526 | |
Martin K. Petersen | c77a571 | 2010-03-10 00:48:33 -0500 | [diff] [blame] | 527 | static struct queue_sysfs_entry queue_max_segments_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 528 | .attr = {.name = "max_segments", .mode = 0444 }, |
Martin K. Petersen | c77a571 | 2010-03-10 00:48:33 -0500 | [diff] [blame] | 529 | .show = queue_max_segments_show, |
| 530 | }; |
| 531 | |
Christoph Hellwig | 1e73973 | 2017-02-08 14:46:49 +0100 | [diff] [blame] | 532 | static struct queue_sysfs_entry queue_max_discard_segments_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 533 | .attr = {.name = "max_discard_segments", .mode = 0444 }, |
Christoph Hellwig | 1e73973 | 2017-02-08 14:46:49 +0100 | [diff] [blame] | 534 | .show = queue_max_discard_segments_show, |
| 535 | }; |
| 536 | |
Martin K. Petersen | 13f05c8 | 2010-09-10 20:50:10 +0200 | [diff] [blame] | 537 | static struct queue_sysfs_entry queue_max_integrity_segments_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 538 | .attr = {.name = "max_integrity_segments", .mode = 0444 }, |
Martin K. Petersen | 13f05c8 | 2010-09-10 20:50:10 +0200 | [diff] [blame] | 539 | .show = queue_max_integrity_segments_show, |
| 540 | }; |
| 541 | |
Martin K. Petersen | c77a571 | 2010-03-10 00:48:33 -0500 | [diff] [blame] | 542 | static struct queue_sysfs_entry queue_max_segment_size_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 543 | .attr = {.name = "max_segment_size", .mode = 0444 }, |
Martin K. Petersen | c77a571 | 2010-03-10 00:48:33 -0500 | [diff] [blame] | 544 | .show = queue_max_segment_size_show, |
| 545 | }; |
| 546 | |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 547 | static struct queue_sysfs_entry queue_iosched_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 548 | .attr = {.name = "scheduler", .mode = 0644 }, |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 549 | .show = elv_iosched_show, |
| 550 | .store = elv_iosched_store, |
| 551 | }; |
| 552 | |
Martin K. Petersen | e68b903 | 2008-01-29 19:14:08 +0100 | [diff] [blame] | 553 | static struct queue_sysfs_entry queue_hw_sector_size_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 554 | .attr = {.name = "hw_sector_size", .mode = 0444 }, |
Martin K. Petersen | e1defc4 | 2009-05-22 17:17:49 -0400 | [diff] [blame] | 555 | .show = queue_logical_block_size_show, |
| 556 | }; |
| 557 | |
| 558 | static struct queue_sysfs_entry queue_logical_block_size_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 559 | .attr = {.name = "logical_block_size", .mode = 0444 }, |
Martin K. Petersen | e1defc4 | 2009-05-22 17:17:49 -0400 | [diff] [blame] | 560 | .show = queue_logical_block_size_show, |
Martin K. Petersen | e68b903 | 2008-01-29 19:14:08 +0100 | [diff] [blame] | 561 | }; |
| 562 | |
Martin K. Petersen | c72758f | 2009-05-22 17:17:53 -0400 | [diff] [blame] | 563 | static struct queue_sysfs_entry queue_physical_block_size_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 564 | .attr = {.name = "physical_block_size", .mode = 0444 }, |
Martin K. Petersen | c72758f | 2009-05-22 17:17:53 -0400 | [diff] [blame] | 565 | .show = queue_physical_block_size_show, |
| 566 | }; |
| 567 | |
Hannes Reinecke | 87caf97 | 2016-10-18 15:40:30 +0900 | [diff] [blame] | 568 | static struct queue_sysfs_entry queue_chunk_sectors_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 569 | .attr = {.name = "chunk_sectors", .mode = 0444 }, |
Hannes Reinecke | 87caf97 | 2016-10-18 15:40:30 +0900 | [diff] [blame] | 570 | .show = queue_chunk_sectors_show, |
| 571 | }; |
| 572 | |
Martin K. Petersen | c72758f | 2009-05-22 17:17:53 -0400 | [diff] [blame] | 573 | static struct queue_sysfs_entry queue_io_min_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 574 | .attr = {.name = "minimum_io_size", .mode = 0444 }, |
Martin K. Petersen | c72758f | 2009-05-22 17:17:53 -0400 | [diff] [blame] | 575 | .show = queue_io_min_show, |
| 576 | }; |
| 577 | |
| 578 | static struct queue_sysfs_entry queue_io_opt_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 579 | .attr = {.name = "optimal_io_size", .mode = 0444 }, |
Martin K. Petersen | c72758f | 2009-05-22 17:17:53 -0400 | [diff] [blame] | 580 | .show = queue_io_opt_show, |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 581 | }; |
| 582 | |
Martin K. Petersen | 86b3728 | 2009-11-10 11:50:21 +0100 | [diff] [blame] | 583 | static struct queue_sysfs_entry queue_discard_granularity_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 584 | .attr = {.name = "discard_granularity", .mode = 0444 }, |
Martin K. Petersen | 86b3728 | 2009-11-10 11:50:21 +0100 | [diff] [blame] | 585 | .show = queue_discard_granularity_show, |
| 586 | }; |
| 587 | |
Jens Axboe | 0034af0 | 2015-07-16 09:14:26 -0600 | [diff] [blame] | 588 | static struct queue_sysfs_entry queue_discard_max_hw_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 589 | .attr = {.name = "discard_max_hw_bytes", .mode = 0444 }, |
Jens Axboe | 0034af0 | 2015-07-16 09:14:26 -0600 | [diff] [blame] | 590 | .show = queue_discard_max_hw_show, |
| 591 | }; |
| 592 | |
Martin K. Petersen | 86b3728 | 2009-11-10 11:50:21 +0100 | [diff] [blame] | 593 | static struct queue_sysfs_entry queue_discard_max_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 594 | .attr = {.name = "discard_max_bytes", .mode = 0644 }, |
Martin K. Petersen | 86b3728 | 2009-11-10 11:50:21 +0100 | [diff] [blame] | 595 | .show = queue_discard_max_show, |
Jens Axboe | 0034af0 | 2015-07-16 09:14:26 -0600 | [diff] [blame] | 596 | .store = queue_discard_max_store, |
Martin K. Petersen | 86b3728 | 2009-11-10 11:50:21 +0100 | [diff] [blame] | 597 | }; |
| 598 | |
Martin K. Petersen | 98262f2 | 2009-12-03 09:24:48 +0100 | [diff] [blame] | 599 | static struct queue_sysfs_entry queue_discard_zeroes_data_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 600 | .attr = {.name = "discard_zeroes_data", .mode = 0444 }, |
Martin K. Petersen | 98262f2 | 2009-12-03 09:24:48 +0100 | [diff] [blame] | 601 | .show = queue_discard_zeroes_data_show, |
| 602 | }; |
| 603 | |
Martin K. Petersen | 4363ac7 | 2012-09-18 12:19:27 -0400 | [diff] [blame] | 604 | static struct queue_sysfs_entry queue_write_same_max_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 605 | .attr = {.name = "write_same_max_bytes", .mode = 0444 }, |
Martin K. Petersen | 4363ac7 | 2012-09-18 12:19:27 -0400 | [diff] [blame] | 606 | .show = queue_write_same_max_show, |
| 607 | }; |
| 608 | |
Chaitanya Kulkarni | a6f0788 | 2016-11-30 12:28:59 -0800 | [diff] [blame] | 609 | static struct queue_sysfs_entry queue_write_zeroes_max_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 610 | .attr = {.name = "write_zeroes_max_bytes", .mode = 0444 }, |
Chaitanya Kulkarni | a6f0788 | 2016-11-30 12:28:59 -0800 | [diff] [blame] | 611 | .show = queue_write_zeroes_max_show, |
| 612 | }; |
| 613 | |
Bartlomiej Zolnierkiewicz | 1308835f | 2009-01-07 12:22:39 +0100 | [diff] [blame] | 614 | static struct queue_sysfs_entry queue_nonrot_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 615 | .attr = {.name = "rotational", .mode = 0644 }, |
Jens Axboe | 956bcb7 | 2010-08-07 18:13:50 +0200 | [diff] [blame] | 616 | .show = queue_show_nonrot, |
| 617 | .store = queue_store_nonrot, |
Bartlomiej Zolnierkiewicz | 1308835f | 2009-01-07 12:22:39 +0100 | [diff] [blame] | 618 | }; |
| 619 | |
Damien Le Moal | 797476b | 2016-10-18 15:40:29 +0900 | [diff] [blame] | 620 | static struct queue_sysfs_entry queue_zoned_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 621 | .attr = {.name = "zoned", .mode = 0444 }, |
Damien Le Moal | 797476b | 2016-10-18 15:40:29 +0900 | [diff] [blame] | 622 | .show = queue_zoned_show, |
| 623 | }; |
| 624 | |
Alan D. Brunelle | ac9fafa | 2008-04-29 14:44:19 +0200 | [diff] [blame] | 625 | static struct queue_sysfs_entry queue_nomerges_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 626 | .attr = {.name = "nomerges", .mode = 0644 }, |
Alan D. Brunelle | ac9fafa | 2008-04-29 14:44:19 +0200 | [diff] [blame] | 627 | .show = queue_nomerges_show, |
| 628 | .store = queue_nomerges_store, |
| 629 | }; |
| 630 | |
Jens Axboe | c7c22e4 | 2008-09-13 20:26:01 +0200 | [diff] [blame] | 631 | static struct queue_sysfs_entry queue_rq_affinity_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 632 | .attr = {.name = "rq_affinity", .mode = 0644 }, |
Jens Axboe | c7c22e4 | 2008-09-13 20:26:01 +0200 | [diff] [blame] | 633 | .show = queue_rq_affinity_show, |
| 634 | .store = queue_rq_affinity_store, |
| 635 | }; |
| 636 | |
Jens Axboe | bc58ba9 | 2009-01-23 10:54:44 +0100 | [diff] [blame] | 637 | static struct queue_sysfs_entry queue_iostats_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 638 | .attr = {.name = "iostats", .mode = 0644 }, |
Jens Axboe | 956bcb7 | 2010-08-07 18:13:50 +0200 | [diff] [blame] | 639 | .show = queue_show_iostats, |
| 640 | .store = queue_store_iostats, |
Jens Axboe | bc58ba9 | 2009-01-23 10:54:44 +0100 | [diff] [blame] | 641 | }; |
| 642 | |
Jens Axboe | e2e1a14 | 2010-06-09 10:42:09 +0200 | [diff] [blame] | 643 | static struct queue_sysfs_entry queue_random_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 644 | .attr = {.name = "add_random", .mode = 0644 }, |
Jens Axboe | 956bcb7 | 2010-08-07 18:13:50 +0200 | [diff] [blame] | 645 | .show = queue_show_random, |
| 646 | .store = queue_store_random, |
Jens Axboe | e2e1a14 | 2010-06-09 10:42:09 +0200 | [diff] [blame] | 647 | }; |
| 648 | |
Jens Axboe | 05229beed | 2015-11-05 10:44:55 -0700 | [diff] [blame] | 649 | static struct queue_sysfs_entry queue_poll_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 650 | .attr = {.name = "io_poll", .mode = 0644 }, |
Jens Axboe | 05229beed | 2015-11-05 10:44:55 -0700 | [diff] [blame] | 651 | .show = queue_poll_show, |
| 652 | .store = queue_poll_store, |
| 653 | }; |
| 654 | |
Jens Axboe | 06426ad | 2016-11-14 13:01:59 -0700 | [diff] [blame] | 655 | static struct queue_sysfs_entry queue_poll_delay_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 656 | .attr = {.name = "io_poll_delay", .mode = 0644 }, |
Jens Axboe | 06426ad | 2016-11-14 13:01:59 -0700 | [diff] [blame] | 657 | .show = queue_poll_delay_show, |
| 658 | .store = queue_poll_delay_store, |
| 659 | }; |
| 660 | |
Jens Axboe | 93e9d8e | 2016-04-12 12:32:46 -0600 | [diff] [blame] | 661 | static struct queue_sysfs_entry queue_wc_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 662 | .attr = {.name = "write_cache", .mode = 0644 }, |
Jens Axboe | 93e9d8e | 2016-04-12 12:32:46 -0600 | [diff] [blame] | 663 | .show = queue_wc_show, |
| 664 | .store = queue_wc_store, |
| 665 | }; |
| 666 | |
Kent Overstreet | 6fcefbe | 2018-05-08 21:33:58 -0400 | [diff] [blame] | 667 | static struct queue_sysfs_entry queue_fua_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 668 | .attr = {.name = "fua", .mode = 0444 }, |
Kent Overstreet | 6fcefbe | 2018-05-08 21:33:58 -0400 | [diff] [blame] | 669 | .show = queue_fua_show, |
| 670 | }; |
| 671 | |
Yigal Korman | ea6ca60 | 2016-06-23 17:05:51 -0400 | [diff] [blame] | 672 | static struct queue_sysfs_entry queue_dax_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 673 | .attr = {.name = "dax", .mode = 0444 }, |
Yigal Korman | ea6ca60 | 2016-06-23 17:05:51 -0400 | [diff] [blame] | 674 | .show = queue_dax_show, |
| 675 | }; |
| 676 | |
Jens Axboe | 87760e5 | 2016-11-09 12:38:14 -0700 | [diff] [blame] | 677 | static struct queue_sysfs_entry queue_wb_lat_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 678 | .attr = {.name = "wbt_lat_usec", .mode = 0644 }, |
Jens Axboe | 87760e5 | 2016-11-09 12:38:14 -0700 | [diff] [blame] | 679 | .show = queue_wb_lat_show, |
| 680 | .store = queue_wb_lat_store, |
| 681 | }; |
| 682 | |
Shaohua Li | 297e3d8 | 2017-03-27 10:51:37 -0700 | [diff] [blame] | 683 | #ifdef CONFIG_BLK_DEV_THROTTLING_LOW |
| 684 | static struct queue_sysfs_entry throtl_sample_time_entry = { |
Joe Perches | 5657a81 | 2018-05-24 13:38:59 -0600 | [diff] [blame] | 685 | .attr = {.name = "throttle_sample_time", .mode = 0644 }, |
Shaohua Li | 297e3d8 | 2017-03-27 10:51:37 -0700 | [diff] [blame] | 686 | .show = blk_throtl_sample_time_show, |
| 687 | .store = blk_throtl_sample_time_store, |
| 688 | }; |
| 689 | #endif |
| 690 | |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 691 | static struct attribute *default_attrs[] = { |
| 692 | &queue_requests_entry.attr, |
| 693 | &queue_ra_entry.attr, |
| 694 | &queue_max_hw_sectors_entry.attr, |
| 695 | &queue_max_sectors_entry.attr, |
Martin K. Petersen | c77a571 | 2010-03-10 00:48:33 -0500 | [diff] [blame] | 696 | &queue_max_segments_entry.attr, |
Christoph Hellwig | 1e73973 | 2017-02-08 14:46:49 +0100 | [diff] [blame] | 697 | &queue_max_discard_segments_entry.attr, |
Martin K. Petersen | 13f05c8 | 2010-09-10 20:50:10 +0200 | [diff] [blame] | 698 | &queue_max_integrity_segments_entry.attr, |
Martin K. Petersen | c77a571 | 2010-03-10 00:48:33 -0500 | [diff] [blame] | 699 | &queue_max_segment_size_entry.attr, |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 700 | &queue_iosched_entry.attr, |
Martin K. Petersen | e68b903 | 2008-01-29 19:14:08 +0100 | [diff] [blame] | 701 | &queue_hw_sector_size_entry.attr, |
Martin K. Petersen | e1defc4 | 2009-05-22 17:17:49 -0400 | [diff] [blame] | 702 | &queue_logical_block_size_entry.attr, |
Martin K. Petersen | c72758f | 2009-05-22 17:17:53 -0400 | [diff] [blame] | 703 | &queue_physical_block_size_entry.attr, |
Hannes Reinecke | 87caf97 | 2016-10-18 15:40:30 +0900 | [diff] [blame] | 704 | &queue_chunk_sectors_entry.attr, |
Martin K. Petersen | c72758f | 2009-05-22 17:17:53 -0400 | [diff] [blame] | 705 | &queue_io_min_entry.attr, |
| 706 | &queue_io_opt_entry.attr, |
Martin K. Petersen | 86b3728 | 2009-11-10 11:50:21 +0100 | [diff] [blame] | 707 | &queue_discard_granularity_entry.attr, |
| 708 | &queue_discard_max_entry.attr, |
Jens Axboe | 0034af0 | 2015-07-16 09:14:26 -0600 | [diff] [blame] | 709 | &queue_discard_max_hw_entry.attr, |
Martin K. Petersen | 98262f2 | 2009-12-03 09:24:48 +0100 | [diff] [blame] | 710 | &queue_discard_zeroes_data_entry.attr, |
Martin K. Petersen | 4363ac7 | 2012-09-18 12:19:27 -0400 | [diff] [blame] | 711 | &queue_write_same_max_entry.attr, |
Chaitanya Kulkarni | a6f0788 | 2016-11-30 12:28:59 -0800 | [diff] [blame] | 712 | &queue_write_zeroes_max_entry.attr, |
Bartlomiej Zolnierkiewicz | 1308835f | 2009-01-07 12:22:39 +0100 | [diff] [blame] | 713 | &queue_nonrot_entry.attr, |
Damien Le Moal | 797476b | 2016-10-18 15:40:29 +0900 | [diff] [blame] | 714 | &queue_zoned_entry.attr, |
Alan D. Brunelle | ac9fafa | 2008-04-29 14:44:19 +0200 | [diff] [blame] | 715 | &queue_nomerges_entry.attr, |
Jens Axboe | c7c22e4 | 2008-09-13 20:26:01 +0200 | [diff] [blame] | 716 | &queue_rq_affinity_entry.attr, |
Jens Axboe | bc58ba9 | 2009-01-23 10:54:44 +0100 | [diff] [blame] | 717 | &queue_iostats_entry.attr, |
Jens Axboe | e2e1a14 | 2010-06-09 10:42:09 +0200 | [diff] [blame] | 718 | &queue_random_entry.attr, |
Jens Axboe | 05229beed | 2015-11-05 10:44:55 -0700 | [diff] [blame] | 719 | &queue_poll_entry.attr, |
Jens Axboe | 93e9d8e | 2016-04-12 12:32:46 -0600 | [diff] [blame] | 720 | &queue_wc_entry.attr, |
Kent Overstreet | 6fcefbe | 2018-05-08 21:33:58 -0400 | [diff] [blame] | 721 | &queue_fua_entry.attr, |
Yigal Korman | ea6ca60 | 2016-06-23 17:05:51 -0400 | [diff] [blame] | 722 | &queue_dax_entry.attr, |
Jens Axboe | 87760e5 | 2016-11-09 12:38:14 -0700 | [diff] [blame] | 723 | &queue_wb_lat_entry.attr, |
Jens Axboe | 06426ad | 2016-11-14 13:01:59 -0700 | [diff] [blame] | 724 | &queue_poll_delay_entry.attr, |
Shaohua Li | 297e3d8 | 2017-03-27 10:51:37 -0700 | [diff] [blame] | 725 | #ifdef CONFIG_BLK_DEV_THROTTLING_LOW |
| 726 | &throtl_sample_time_entry.attr, |
| 727 | #endif |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 728 | NULL, |
| 729 | }; |
| 730 | |
| 731 | #define to_queue(atr) container_of((atr), struct queue_sysfs_entry, attr) |
| 732 | |
| 733 | static ssize_t |
| 734 | queue_attr_show(struct kobject *kobj, struct attribute *attr, char *page) |
| 735 | { |
| 736 | struct queue_sysfs_entry *entry = to_queue(attr); |
| 737 | struct request_queue *q = |
| 738 | container_of(kobj, struct request_queue, kobj); |
| 739 | ssize_t res; |
| 740 | |
| 741 | if (!entry->show) |
| 742 | return -EIO; |
| 743 | mutex_lock(&q->sysfs_lock); |
Bart Van Assche | 3f3299d | 2012-11-28 13:42:38 +0100 | [diff] [blame] | 744 | if (blk_queue_dying(q)) { |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 745 | mutex_unlock(&q->sysfs_lock); |
| 746 | return -ENOENT; |
| 747 | } |
| 748 | res = entry->show(q, page); |
| 749 | mutex_unlock(&q->sysfs_lock); |
| 750 | return res; |
| 751 | } |
| 752 | |
| 753 | static ssize_t |
| 754 | queue_attr_store(struct kobject *kobj, struct attribute *attr, |
| 755 | const char *page, size_t length) |
| 756 | { |
| 757 | struct queue_sysfs_entry *entry = to_queue(attr); |
Jens Axboe | 6728cb0 | 2008-01-31 13:03:55 +0100 | [diff] [blame] | 758 | struct request_queue *q; |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 759 | ssize_t res; |
| 760 | |
| 761 | if (!entry->store) |
| 762 | return -EIO; |
Jens Axboe | 6728cb0 | 2008-01-31 13:03:55 +0100 | [diff] [blame] | 763 | |
| 764 | q = container_of(kobj, struct request_queue, kobj); |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 765 | mutex_lock(&q->sysfs_lock); |
Bart Van Assche | 3f3299d | 2012-11-28 13:42:38 +0100 | [diff] [blame] | 766 | if (blk_queue_dying(q)) { |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 767 | mutex_unlock(&q->sysfs_lock); |
| 768 | return -ENOENT; |
| 769 | } |
| 770 | res = entry->store(q, page, length); |
| 771 | mutex_unlock(&q->sysfs_lock); |
| 772 | return res; |
| 773 | } |
| 774 | |
Tejun Heo | 548bc8e | 2013-01-09 08:05:13 -0800 | [diff] [blame] | 775 | static void blk_free_queue_rcu(struct rcu_head *rcu_head) |
| 776 | { |
| 777 | struct request_queue *q = container_of(rcu_head, struct request_queue, |
| 778 | rcu_head); |
| 779 | kmem_cache_free(blk_requestq_cachep, q); |
| 780 | } |
| 781 | |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 782 | /** |
Bart Van Assche | dc9edc4 | 2017-06-14 13:27:50 -0600 | [diff] [blame] | 783 | * __blk_release_queue - release a request queue when it is no longer needed |
| 784 | * @work: pointer to the release_work member of the request queue to be released |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 785 | * |
| 786 | * Description: |
Bart Van Assche | dc9edc4 | 2017-06-14 13:27:50 -0600 | [diff] [blame] | 787 | * blk_release_queue is the counterpart of blk_init_queue(). It should be |
| 788 | * called when a request queue is being released; typically when a block |
| 789 | * device is being de-registered. Its primary task it to free the queue |
| 790 | * itself. |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 791 | * |
Bart Van Assche | dc9edc4 | 2017-06-14 13:27:50 -0600 | [diff] [blame] | 792 | * Notes: |
Bart Van Assche | 45a9c9d | 2014-12-09 16:57:48 +0100 | [diff] [blame] | 793 | * The low level driver must have finished any outstanding requests first |
| 794 | * via blk_cleanup_queue(). |
Bart Van Assche | dc9edc4 | 2017-06-14 13:27:50 -0600 | [diff] [blame] | 795 | * |
| 796 | * Although blk_release_queue() may be called with preemption disabled, |
| 797 | * __blk_release_queue() may sleep. |
| 798 | */ |
| 799 | static void __blk_release_queue(struct work_struct *work) |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 800 | { |
Bart Van Assche | dc9edc4 | 2017-06-14 13:27:50 -0600 | [diff] [blame] | 801 | struct request_queue *q = container_of(work, typeof(*q), release_work); |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 802 | |
Omar Sandoval | 34dbad5 | 2017-03-21 08:56:08 -0700 | [diff] [blame] | 803 | if (test_bit(QUEUE_FLAG_POLL_STATS, &q->queue_flags)) |
| 804 | blk_stat_remove_callback(q, q->poll_cb); |
| 805 | blk_stat_free_callback(q->poll_cb); |
Hannes Reinecke | 777eb1b | 2011-09-28 08:07:01 -0600 | [diff] [blame] | 806 | |
Omar Sandoval | 34dbad5 | 2017-03-21 08:56:08 -0700 | [diff] [blame] | 807 | blk_free_queue_stats(q->stats); |
| 808 | |
Bart Van Assche | b425e50 | 2017-05-31 14:43:45 -0700 | [diff] [blame] | 809 | blk_exit_rl(q, &q->root_rl); |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 810 | |
| 811 | if (q->queue_tags) |
| 812 | __blk_queue_free_tags(q); |
| 813 | |
Christoph Hellwig | 6d247d7 | 2017-01-27 09:51:45 -0700 | [diff] [blame] | 814 | if (!q->mq_ops) { |
| 815 | if (q->exit_rq_fn) |
| 816 | q->exit_rq_fn(q, q->fq->flush_rq); |
Ming Lei | f70ced0 | 2014-09-25 23:23:47 +0800 | [diff] [blame] | 817 | blk_free_flush_queue(q->fq); |
Christoph Hellwig | 6d247d7 | 2017-01-27 09:51:45 -0700 | [diff] [blame] | 818 | } else { |
Ming Lei | e09aae7 | 2015-01-29 20:17:27 +0800 | [diff] [blame] | 819 | blk_mq_release(q); |
Christoph Hellwig | 6d247d7 | 2017-01-27 09:51:45 -0700 | [diff] [blame] | 820 | } |
Christoph Hellwig | 1874198 | 2014-02-10 09:29:00 -0700 | [diff] [blame] | 821 | |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 822 | blk_trace_shutdown(q); |
| 823 | |
Omar Sandoval | 62ebce16 | 2017-01-31 14:53:21 -0800 | [diff] [blame] | 824 | if (q->mq_ops) |
| 825 | blk_mq_debugfs_unregister(q); |
| 826 | |
Kent Overstreet | 338aa96 | 2018-05-20 18:25:47 -0400 | [diff] [blame] | 827 | bioset_exit(&q->bio_split); |
Kent Overstreet | 54efd50 | 2015-04-23 22:37:18 -0700 | [diff] [blame] | 828 | |
Tejun Heo | a73f730 | 2011-12-14 00:33:37 +0100 | [diff] [blame] | 829 | ida_simple_remove(&blk_queue_ida, q->id); |
Tejun Heo | 548bc8e | 2013-01-09 08:05:13 -0800 | [diff] [blame] | 830 | call_rcu(&q->rcu_head, blk_free_queue_rcu); |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 831 | } |
| 832 | |
Bart Van Assche | dc9edc4 | 2017-06-14 13:27:50 -0600 | [diff] [blame] | 833 | static void blk_release_queue(struct kobject *kobj) |
| 834 | { |
| 835 | struct request_queue *q = |
| 836 | container_of(kobj, struct request_queue, kobj); |
| 837 | |
| 838 | INIT_WORK(&q->release_work, __blk_release_queue); |
| 839 | schedule_work(&q->release_work); |
| 840 | } |
| 841 | |
Emese Revfy | 52cf25d | 2010-01-19 02:58:23 +0100 | [diff] [blame] | 842 | static const struct sysfs_ops queue_sysfs_ops = { |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 843 | .show = queue_attr_show, |
| 844 | .store = queue_attr_store, |
| 845 | }; |
| 846 | |
| 847 | struct kobj_type blk_queue_ktype = { |
| 848 | .sysfs_ops = &queue_sysfs_ops, |
| 849 | .default_attrs = default_attrs, |
| 850 | .release = blk_release_queue, |
| 851 | }; |
| 852 | |
Bart Van Assche | 2c2086a | 2018-01-17 11:48:10 -0800 | [diff] [blame] | 853 | /** |
| 854 | * blk_register_queue - register a block layer queue with sysfs |
| 855 | * @disk: Disk of which the request queue should be registered with sysfs. |
| 856 | */ |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 857 | int blk_register_queue(struct gendisk *disk) |
| 858 | { |
| 859 | int ret; |
Li Zefan | 1d54ad6 | 2009-04-14 14:00:05 +0800 | [diff] [blame] | 860 | struct device *dev = disk_to_dev(disk); |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 861 | struct request_queue *q = disk->queue; |
| 862 | |
Akinobu Mita | fb19974 | 2008-04-21 09:51:06 +0200 | [diff] [blame] | 863 | if (WARN_ON(!q)) |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 864 | return -ENXIO; |
| 865 | |
Omar Sandoval | 334335d | 2017-03-28 16:12:15 -0700 | [diff] [blame] | 866 | WARN_ONCE(test_bit(QUEUE_FLAG_REGISTERED, &q->queue_flags), |
| 867 | "%s is registering an already registered queue\n", |
| 868 | kobject_name(&dev->kobj)); |
| 869 | queue_flag_set_unlocked(QUEUE_FLAG_REGISTERED, q); |
| 870 | |
Tejun Heo | 749fefe | 2012-09-20 14:08:52 -0700 | [diff] [blame] | 871 | /* |
Tejun Heo | 17497ac | 2014-09-24 13:31:50 -0400 | [diff] [blame] | 872 | * SCSI probing may synchronously create and destroy a lot of |
| 873 | * request_queues for non-existent devices. Shutting down a fully |
| 874 | * functional queue takes measureable wallclock time as RCU grace |
| 875 | * periods are involved. To avoid excessive latency in these |
| 876 | * cases, a request_queue starts out in a degraded mode which is |
| 877 | * faster to shut down and is made fully functional here as |
| 878 | * request_queues for non-existent devices never get registered. |
Tejun Heo | 749fefe | 2012-09-20 14:08:52 -0700 | [diff] [blame] | 879 | */ |
Alan Stern | df35c7c | 2014-09-09 11:50:58 -0400 | [diff] [blame] | 880 | if (!blk_queue_init_done(q)) { |
| 881 | queue_flag_set_unlocked(QUEUE_FLAG_INIT_DONE, q); |
Dan Williams | 3ef28e8 | 2015-10-21 13:20:12 -0400 | [diff] [blame] | 882 | percpu_ref_switch_to_percpu(&q->q_usage_counter); |
Alan Stern | df35c7c | 2014-09-09 11:50:58 -0400 | [diff] [blame] | 883 | blk_queue_bypass_end(q); |
| 884 | } |
Tejun Heo | 749fefe | 2012-09-20 14:08:52 -0700 | [diff] [blame] | 885 | |
Li Zefan | 1d54ad6 | 2009-04-14 14:00:05 +0800 | [diff] [blame] | 886 | ret = blk_trace_init_sysfs(dev); |
| 887 | if (ret) |
| 888 | return ret; |
| 889 | |
Tahsin Erdogan | b410aff | 2017-02-14 19:27:38 -0800 | [diff] [blame] | 890 | /* Prevent changes through sysfs until registration is completed. */ |
| 891 | mutex_lock(&q->sysfs_lock); |
| 892 | |
Linus Torvalds | c905959 | 2009-06-11 10:52:27 -0700 | [diff] [blame] | 893 | ret = kobject_add(&q->kobj, kobject_get(&dev->kobj), "%s", "queue"); |
Liu Yuan | ed5302d | 2011-04-19 13:47:58 +0200 | [diff] [blame] | 894 | if (ret < 0) { |
| 895 | blk_trace_remove_sysfs(dev); |
Tahsin Erdogan | b410aff | 2017-02-14 19:27:38 -0800 | [diff] [blame] | 896 | goto unlock; |
Liu Yuan | ed5302d | 2011-04-19 13:47:58 +0200 | [diff] [blame] | 897 | } |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 898 | |
Bart Van Assche | a8ecdd7 | 2017-05-25 16:38:06 -0700 | [diff] [blame] | 899 | if (q->mq_ops) { |
Bart Van Assche | 2d0364c | 2017-04-26 13:47:48 -0700 | [diff] [blame] | 900 | __blk_mq_register_dev(dev, q); |
Bart Van Assche | a8ecdd7 | 2017-05-25 16:38:06 -0700 | [diff] [blame] | 901 | blk_mq_debugfs_register(q); |
| 902 | } |
Omar Sandoval | 9c1051a | 2017-05-04 08:17:21 -0600 | [diff] [blame] | 903 | |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 904 | kobject_uevent(&q->kobj, KOBJ_ADD); |
| 905 | |
Jan Kara | 8330cdb | 2017-04-19 11:33:27 +0200 | [diff] [blame] | 906 | wbt_enable_default(q); |
Jens Axboe | 87760e5 | 2016-11-09 12:38:14 -0700 | [diff] [blame] | 907 | |
Shaohua Li | d61fcfa | 2017-03-27 10:51:38 -0700 | [diff] [blame] | 908 | blk_throtl_register_queue(q); |
| 909 | |
Omar Sandoval | 80c6b15 | 2017-02-06 12:52:24 -0800 | [diff] [blame] | 910 | if (q->request_fn || (q->mq_ops && q->elevator)) { |
| 911 | ret = elv_register_queue(q); |
| 912 | if (ret) { |
Bart Van Assche | 2c2086a | 2018-01-17 11:48:10 -0800 | [diff] [blame] | 913 | mutex_unlock(&q->sysfs_lock); |
Omar Sandoval | 80c6b15 | 2017-02-06 12:52:24 -0800 | [diff] [blame] | 914 | kobject_uevent(&q->kobj, KOBJ_REMOVE); |
| 915 | kobject_del(&q->kobj); |
| 916 | blk_trace_remove_sysfs(dev); |
| 917 | kobject_put(&dev->kobj); |
Bart Van Assche | 2c2086a | 2018-01-17 11:48:10 -0800 | [diff] [blame] | 918 | return ret; |
Omar Sandoval | 80c6b15 | 2017-02-06 12:52:24 -0800 | [diff] [blame] | 919 | } |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 920 | } |
Tahsin Erdogan | b410aff | 2017-02-14 19:27:38 -0800 | [diff] [blame] | 921 | ret = 0; |
| 922 | unlock: |
| 923 | mutex_unlock(&q->sysfs_lock); |
| 924 | return ret; |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 925 | } |
Mike Snitzer | fa70d2e | 2018-01-08 22:01:13 -0500 | [diff] [blame] | 926 | EXPORT_SYMBOL_GPL(blk_register_queue); |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 927 | |
Bart Van Assche | 2c2086a | 2018-01-17 11:48:10 -0800 | [diff] [blame] | 928 | /** |
| 929 | * blk_unregister_queue - counterpart of blk_register_queue() |
| 930 | * @disk: Disk of which the request queue should be unregistered from sysfs. |
| 931 | * |
| 932 | * Note: the caller is responsible for guaranteeing that this function is called |
| 933 | * after blk_register_queue() has finished. |
| 934 | */ |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 935 | void blk_unregister_queue(struct gendisk *disk) |
| 936 | { |
| 937 | struct request_queue *q = disk->queue; |
| 938 | |
Akinobu Mita | fb19974 | 2008-04-21 09:51:06 +0200 | [diff] [blame] | 939 | if (WARN_ON(!q)) |
| 940 | return; |
| 941 | |
Mike Snitzer | fa70d2e | 2018-01-08 22:01:13 -0500 | [diff] [blame] | 942 | /* Return early if disk->queue was never registered. */ |
| 943 | if (!test_bit(QUEUE_FLAG_REGISTERED, &q->queue_flags)) |
| 944 | return; |
| 945 | |
Mike Snitzer | 667257e | 2018-01-11 14:11:01 -0500 | [diff] [blame] | 946 | /* |
Bart Van Assche | 2c2086a | 2018-01-17 11:48:10 -0800 | [diff] [blame] | 947 | * Since sysfs_remove_dir() prevents adding new directory entries |
| 948 | * before removal of existing entries starts, protect against |
| 949 | * concurrent elv_iosched_store() calls. |
Mike Snitzer | 667257e | 2018-01-11 14:11:01 -0500 | [diff] [blame] | 950 | */ |
David Jeffery | e9a823f | 2017-08-28 10:52:44 -0600 | [diff] [blame] | 951 | mutex_lock(&q->sysfs_lock); |
Mike Snitzer | 667257e | 2018-01-11 14:11:01 -0500 | [diff] [blame] | 952 | |
Bart Van Assche | 8814ce8 | 2018-03-07 17:10:04 -0800 | [diff] [blame] | 953 | blk_queue_flag_clear(QUEUE_FLAG_REGISTERED, q); |
Omar Sandoval | 334335d | 2017-03-28 16:12:15 -0700 | [diff] [blame] | 954 | |
Bart Van Assche | 2c2086a | 2018-01-17 11:48:10 -0800 | [diff] [blame] | 955 | /* |
| 956 | * Remove the sysfs attributes before unregistering the queue data |
| 957 | * structures that can be modified through sysfs. |
| 958 | */ |
Jens Axboe | 320ae51 | 2013-10-24 09:20:05 +0100 | [diff] [blame] | 959 | if (q->mq_ops) |
Matias Bjørling | b21d5b3 | 2016-09-16 14:25:06 +0200 | [diff] [blame] | 960 | blk_mq_unregister_dev(disk_to_dev(disk), q); |
Bart Van Assche | 2c2086a | 2018-01-17 11:48:10 -0800 | [diff] [blame] | 961 | mutex_unlock(&q->sysfs_lock); |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 962 | |
Zdenek Kabelac | 48c0d4d | 2009-09-25 06:19:26 +0200 | [diff] [blame] | 963 | kobject_uevent(&q->kobj, KOBJ_REMOVE); |
| 964 | kobject_del(&q->kobj); |
| 965 | blk_trace_remove_sysfs(disk_to_dev(disk)); |
Mike Snitzer | 667257e | 2018-01-11 14:11:01 -0500 | [diff] [blame] | 966 | |
Bart Van Assche | 2c2086a | 2018-01-17 11:48:10 -0800 | [diff] [blame] | 967 | wbt_exit(q); |
| 968 | |
| 969 | mutex_lock(&q->sysfs_lock); |
| 970 | if (q->request_fn || (q->mq_ops && q->elevator)) |
| 971 | elv_unregister_queue(q); |
Mike Snitzer | 667257e | 2018-01-11 14:11:01 -0500 | [diff] [blame] | 972 | mutex_unlock(&q->sysfs_lock); |
Bart Van Assche | 2c2086a | 2018-01-17 11:48:10 -0800 | [diff] [blame] | 973 | |
| 974 | kobject_put(&disk_to_dev(disk)->kobj); |
Jens Axboe | 8324aa9 | 2008-01-29 14:51:59 +0100 | [diff] [blame] | 975 | } |