Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
7cc01581 TH |
2 | /* |
3 | * Block data types and constants. Directly include this file only to | |
4 | * break include dependency loop. | |
5 | */ | |
6 | #ifndef __LINUX_BLK_TYPES_H | |
7 | #define __LINUX_BLK_TYPES_H | |
8 | ||
7cc01581 | 9 | #include <linux/types.h> |
0781e79e | 10 | #include <linux/bvec.h> |
0d02129e | 11 | #include <linux/device.h> |
5238dcf4 | 12 | #include <linux/ktime.h> |
7cc01581 TH |
13 | |
14 | struct bio_set; | |
15 | struct bio; | |
16 | struct bio_integrity_payload; | |
17 | struct page; | |
852c788f TH |
18 | struct io_context; |
19 | struct cgroup_subsys_state; | |
4246a0b6 | 20 | typedef void (bio_end_io_t) (struct bio *); |
a892c8d5 | 21 | struct bio_crypt_ctx; |
7cc01581 | 22 | |
99457db8 CH |
23 | /* |
24 | * The basic unit of block I/O is a sector. It is used in a number of contexts | |
25 | * in Linux (blk, bio, genhd). The size of one sector is 512 = 2**9 | |
26 | * bytes. Variables of type sector_t represent an offset or size that is a | |
27 | * multiple of 512 bytes. Hence these two constants. | |
28 | */ | |
29 | #ifndef SECTOR_SHIFT | |
30 | #define SECTOR_SHIFT 9 | |
31 | #endif | |
32 | #ifndef SECTOR_SIZE | |
33 | #define SECTOR_SIZE (1 << SECTOR_SHIFT) | |
34 | #endif | |
35 | ||
36 | #define PAGE_SECTORS_SHIFT (PAGE_SHIFT - SECTOR_SHIFT) | |
37 | #define PAGE_SECTORS (1 << PAGE_SECTORS_SHIFT) | |
38 | #define SECTOR_MASK (PAGE_SECTORS - 1) | |
39 | ||
621c1f42 | 40 | struct block_device { |
29ff57c6 | 41 | sector_t bd_start_sect; |
f09313c5 | 42 | sector_t bd_nr_sectors; |
15e3d2c5 CH |
43 | struct disk_stats __percpu *bd_stats; |
44 | unsigned long bd_stamp; | |
83950d35 | 45 | bool bd_read_only; /* read-only policy */ |
46d40cfa | 46 | dev_t bd_dev; |
9acf381f | 47 | atomic_t bd_openers; |
621c1f42 CH |
48 | struct inode * bd_inode; /* will die */ |
49 | struct super_block * bd_super; | |
621c1f42 | 50 | void * bd_claiming; |
0d02129e | 51 | struct device bd_device; |
621c1f42 CH |
52 | void * bd_holder; |
53 | int bd_holders; | |
54 | bool bd_write_holder; | |
1bdd5ae0 | 55 | struct kobject *bd_holder_dir; |
621c1f42 | 56 | u8 bd_partno; |
c2b4bb8c | 57 | spinlock_t bd_size_lock; /* for bd_inode->i_size updates */ |
621c1f42 | 58 | struct gendisk * bd_disk; |
17220ca5 | 59 | struct request_queue * bd_queue; |
621c1f42 CH |
60 | |
61 | /* The counter of freeze processes */ | |
62 | int bd_fsfreeze_count; | |
63 | /* Mutex for freeze */ | |
64 | struct mutex bd_fsfreeze_mutex; | |
040f04bd | 65 | struct super_block *bd_fsfreeze_sb; |
231926db CH |
66 | |
67 | struct partition_meta_info *bd_meta_info; | |
b309e993 CH |
68 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
69 | bool bd_make_it_fail; | |
70 | #endif | |
621c1f42 CH |
71 | } __randomize_layout; |
72 | ||
a954ea81 | 73 | #define bdev_whole(_bdev) \ |
cb8432d6 | 74 | ((_bdev)->bd_disk->part0) |
a954ea81 | 75 | |
0d02129e CH |
76 | #define dev_to_bdev(device) \ |
77 | container_of((device), struct block_device, bd_device) | |
78 | ||
8d65269f | 79 | #define bdev_kobj(_bdev) \ |
0d02129e | 80 | (&((_bdev)->bd_device.kobj)) |
8d65269f | 81 | |
2a842aca CH |
82 | /* |
83 | * Block error status values. See block/blk-core:blk_errors for the details. | |
6e2fb221 | 84 | * Alpha cannot write a byte atomically, so we need to use 32-bit value. |
2a842aca | 85 | */ |
6e2fb221 MP |
86 | #if defined(CONFIG_ALPHA) && !defined(__alpha_bwx__) |
87 | typedef u32 __bitwise blk_status_t; | |
aad5b23e | 88 | typedef u32 blk_short_t; |
6e2fb221 | 89 | #else |
2a842aca | 90 | typedef u8 __bitwise blk_status_t; |
aad5b23e | 91 | typedef u16 blk_short_t; |
6e2fb221 | 92 | #endif |
2a842aca CH |
93 | #define BLK_STS_OK 0 |
94 | #define BLK_STS_NOTSUPP ((__force blk_status_t)1) | |
95 | #define BLK_STS_TIMEOUT ((__force blk_status_t)2) | |
96 | #define BLK_STS_NOSPC ((__force blk_status_t)3) | |
97 | #define BLK_STS_TRANSPORT ((__force blk_status_t)4) | |
98 | #define BLK_STS_TARGET ((__force blk_status_t)5) | |
99 | #define BLK_STS_NEXUS ((__force blk_status_t)6) | |
100 | #define BLK_STS_MEDIUM ((__force blk_status_t)7) | |
101 | #define BLK_STS_PROTECTION ((__force blk_status_t)8) | |
102 | #define BLK_STS_RESOURCE ((__force blk_status_t)9) | |
103 | #define BLK_STS_IOERR ((__force blk_status_t)10) | |
104 | ||
4e4cbee9 CH |
105 | /* hack for device mapper, don't use elsewhere: */ |
106 | #define BLK_STS_DM_REQUEUE ((__force blk_status_t)11) | |
107 | ||
98d40e76 HR |
108 | /* |
109 | * BLK_STS_AGAIN should only be returned if RQF_NOWAIT is set | |
110 | * and the bio would block (cf bio_wouldblock_error()) | |
111 | */ | |
03a07c92 GR |
112 | #define BLK_STS_AGAIN ((__force blk_status_t)12) |
113 | ||
86ff7c2a ML |
114 | /* |
115 | * BLK_STS_DEV_RESOURCE is returned from the driver to the block layer if | |
116 | * device related resources are unavailable, but the driver can guarantee | |
117 | * that the queue will be rerun in the future once resources become | |
118 | * available again. This is typically the case for device specific | |
119 | * resources that are consumed for IO. If the driver fails allocating these | |
120 | * resources, we know that inflight (or pending) IO will free these | |
121 | * resource upon completion. | |
122 | * | |
123 | * This is different from BLK_STS_RESOURCE in that it explicitly references | |
124 | * a device specific resource. For resources of wider scope, allocation | |
125 | * failure can happen without having pending IO. This means that we can't | |
126 | * rely on request completions freeing these resources, as IO may not be in | |
127 | * flight. Examples of that are kernel memory allocations, DMA mappings, or | |
128 | * any other system wide resources. | |
129 | */ | |
130 | #define BLK_STS_DEV_RESOURCE ((__force blk_status_t)13) | |
131 | ||
0512a75b KB |
132 | /* |
133 | * BLK_STS_ZONE_RESOURCE is returned from the driver to the block layer if zone | |
134 | * related resources are unavailable, but the driver can guarantee the queue | |
135 | * will be rerun in the future once the resources become available again. | |
136 | * | |
137 | * This is different from BLK_STS_DEV_RESOURCE in that it explicitly references | |
138 | * a zone specific resource and IO to a different zone on the same device could | |
139 | * still be served. Examples of that are zones that are write-locked, but a read | |
140 | * to the same zone could be served. | |
141 | */ | |
142 | #define BLK_STS_ZONE_RESOURCE ((__force blk_status_t)14) | |
143 | ||
3b481d91 KB |
144 | /* |
145 | * BLK_STS_ZONE_OPEN_RESOURCE is returned from the driver in the completion | |
146 | * path if the device returns a status indicating that too many zone resources | |
147 | * are currently open. The same command should be successful if resubmitted | |
148 | * after the number of open zones decreases below the device's limits, which is | |
149 | * reported in the request_queue's max_open_zones. | |
150 | */ | |
151 | #define BLK_STS_ZONE_OPEN_RESOURCE ((__force blk_status_t)15) | |
152 | ||
153 | /* | |
154 | * BLK_STS_ZONE_ACTIVE_RESOURCE is returned from the driver in the completion | |
155 | * path if the device returns a status indicating that too many zone resources | |
156 | * are currently active. The same command should be successful if resubmitted | |
157 | * after the number of active zones decreases below the device's limits, which | |
158 | * is reported in the request_queue's max_active_zones. | |
159 | */ | |
160 | #define BLK_STS_ZONE_ACTIVE_RESOURCE ((__force blk_status_t)16) | |
161 | ||
2651bf68 SL |
162 | /* |
163 | * BLK_STS_OFFLINE is returned from the driver when the target device is offline | |
164 | * or is being taken offline. This could help differentiate the case where a | |
165 | * device is intentionally being shut down from a real I/O error. | |
166 | */ | |
167 | #define BLK_STS_OFFLINE ((__force blk_status_t)17) | |
168 | ||
9111e568 KB |
169 | /** |
170 | * blk_path_error - returns true if error may be path related | |
171 | * @error: status the request was completed with | |
172 | * | |
173 | * Description: | |
174 | * This classifies block error status into non-retryable errors and ones | |
175 | * that may be successful if retried on a failover path. | |
176 | * | |
177 | * Return: | |
178 | * %false - retrying failover path will not help | |
179 | * %true - may succeed if retried | |
180 | */ | |
181 | static inline bool blk_path_error(blk_status_t error) | |
182 | { | |
183 | switch (error) { | |
184 | case BLK_STS_NOTSUPP: | |
185 | case BLK_STS_NOSPC: | |
186 | case BLK_STS_TARGET: | |
187 | case BLK_STS_NEXUS: | |
188 | case BLK_STS_MEDIUM: | |
189 | case BLK_STS_PROTECTION: | |
190 | return false; | |
191 | } | |
192 | ||
193 | /* Anything else could be a path failure, so should be retried */ | |
194 | return true; | |
195 | } | |
196 | ||
5238dcf4 OS |
197 | /* |
198 | * From most significant bit: | |
199 | * 1 bit: reserved for other usage, see below | |
200 | * 12 bits: original size of bio | |
201 | * 51 bits: issue time of bio | |
202 | */ | |
203 | #define BIO_ISSUE_RES_BITS 1 | |
204 | #define BIO_ISSUE_SIZE_BITS 12 | |
205 | #define BIO_ISSUE_RES_SHIFT (64 - BIO_ISSUE_RES_BITS) | |
206 | #define BIO_ISSUE_SIZE_SHIFT (BIO_ISSUE_RES_SHIFT - BIO_ISSUE_SIZE_BITS) | |
207 | #define BIO_ISSUE_TIME_MASK ((1ULL << BIO_ISSUE_SIZE_SHIFT) - 1) | |
208 | #define BIO_ISSUE_SIZE_MASK \ | |
209 | (((1ULL << BIO_ISSUE_SIZE_BITS) - 1) << BIO_ISSUE_SIZE_SHIFT) | |
210 | #define BIO_ISSUE_RES_MASK (~((1ULL << BIO_ISSUE_RES_SHIFT) - 1)) | |
211 | ||
212 | /* Reserved bit for blk-throtl */ | |
213 | #define BIO_ISSUE_THROTL_SKIP_LATENCY (1ULL << 63) | |
214 | ||
215 | struct bio_issue { | |
216 | u64 value; | |
217 | }; | |
218 | ||
219 | static inline u64 __bio_issue_time(u64 time) | |
220 | { | |
221 | return time & BIO_ISSUE_TIME_MASK; | |
222 | } | |
223 | ||
224 | static inline u64 bio_issue_time(struct bio_issue *issue) | |
225 | { | |
226 | return __bio_issue_time(issue->value); | |
227 | } | |
228 | ||
229 | static inline sector_t bio_issue_size(struct bio_issue *issue) | |
230 | { | |
231 | return ((issue->value & BIO_ISSUE_SIZE_MASK) >> BIO_ISSUE_SIZE_SHIFT); | |
232 | } | |
233 | ||
234 | static inline void bio_issue_init(struct bio_issue *issue, | |
235 | sector_t size) | |
236 | { | |
237 | size &= (1ULL << BIO_ISSUE_SIZE_BITS) - 1; | |
238 | issue->value = ((issue->value & BIO_ISSUE_RES_MASK) | | |
239 | (ktime_get_ns() & BIO_ISSUE_TIME_MASK) | | |
240 | ((u64)size << BIO_ISSUE_SIZE_SHIFT)); | |
241 | } | |
242 | ||
3e08773c CH |
243 | typedef unsigned int blk_qc_t; |
244 | #define BLK_QC_T_NONE -1U | |
245 | ||
7cc01581 TH |
246 | /* |
247 | * main unit of I/O for the block layer and lower layers (ie drivers and | |
248 | * stacking drivers) | |
249 | */ | |
250 | struct bio { | |
7cc01581 | 251 | struct bio *bi_next; /* request queue link */ |
309dca30 | 252 | struct block_device *bi_bdev; |
5d2ae142 BVA |
253 | unsigned int bi_opf; /* bottom bits REQ_OP, top bits |
254 | * req_flags. | |
4e1b2d52 | 255 | */ |
7a800a20 | 256 | unsigned short bi_flags; /* BIO_* below */ |
43b62ce3 | 257 | unsigned short bi_ioprio; |
111be883 | 258 | blk_status_t bi_status; |
993e4cde | 259 | atomic_t __bi_remaining; |
7cc01581 | 260 | |
111be883 | 261 | struct bvec_iter bi_iter; |
196d38bc | 262 | |
3e08773c | 263 | blk_qc_t bi_cookie; |
7cc01581 | 264 | bio_end_io_t *bi_end_io; |
7cc01581 | 265 | void *bi_private; |
852c788f TH |
266 | #ifdef CONFIG_BLK_CGROUP |
267 | /* | |
db6638d7 DZ |
268 | * Represents the association of the css and request_queue for the bio. |
269 | * If a bio goes direct to device, it will not have a blkg as it will | |
270 | * not have a request_queue associated with it. The reference is put | |
271 | * on release of the bio. | |
852c788f | 272 | */ |
08e18eab | 273 | struct blkcg_gq *bi_blkg; |
5238dcf4 | 274 | struct bio_issue bi_issue; |
7caa4715 TH |
275 | #ifdef CONFIG_BLK_CGROUP_IOCOST |
276 | u64 bi_iocost_cost; | |
277 | #endif | |
852c788f | 278 | #endif |
a892c8d5 ST |
279 | |
280 | #ifdef CONFIG_BLK_INLINE_ENCRYPTION | |
281 | struct bio_crypt_ctx *bi_crypt_context; | |
282 | #endif | |
283 | ||
180b2f95 | 284 | union { |
7cc01581 | 285 | #if defined(CONFIG_BLK_DEV_INTEGRITY) |
180b2f95 | 286 | struct bio_integrity_payload *bi_integrity; /* data integrity */ |
7cc01581 | 287 | #endif |
180b2f95 | 288 | }; |
7cc01581 | 289 | |
4f024f37 KO |
290 | unsigned short bi_vcnt; /* how many bio_vec's */ |
291 | ||
f44b48c7 KO |
292 | /* |
293 | * Everything starting with bi_max_vecs will be preserved by bio_reset() | |
294 | */ | |
295 | ||
4f024f37 | 296 | unsigned short bi_max_vecs; /* max bvl_vecs we can hold */ |
f44b48c7 | 297 | |
dac56212 | 298 | atomic_t __bi_cnt; /* pin count */ |
f44b48c7 KO |
299 | |
300 | struct bio_vec *bi_io_vec; /* the actual vec list */ | |
301 | ||
395c72a7 KO |
302 | struct bio_set *bi_pool; |
303 | ||
7cc01581 TH |
304 | /* |
305 | * We can inline a number of vecs at the end of the bio, to avoid | |
306 | * double allocations for a small number of bio_vecs. This member | |
307 | * MUST obviously be kept at the very end of the bio. | |
308 | */ | |
5a58ec8c | 309 | struct bio_vec bi_inline_vecs[]; |
7cc01581 TH |
310 | }; |
311 | ||
f44b48c7 | 312 | #define BIO_RESET_BYTES offsetof(struct bio, bi_max_vecs) |
e83502ca | 313 | #define BIO_MAX_SECTORS (UINT_MAX >> SECTOR_SHIFT) |
f44b48c7 | 314 | |
7cc01581 TH |
315 | /* |
316 | * bio flags | |
317 | */ | |
2b24e6f6 JT |
318 | enum { |
319 | BIO_NO_PAGE_REF, /* don't put release vec pages */ | |
2b24e6f6 JT |
320 | BIO_CLONED, /* doesn't own data */ |
321 | BIO_BOUNCED, /* bio is a bounce bio */ | |
b8e24a93 | 322 | BIO_WORKINGSET, /* contains userspace workingset pages */ |
2b24e6f6 JT |
323 | BIO_QUIET, /* Make BIO Quiet */ |
324 | BIO_CHAIN, /* chained bio, ->bi_remaining in effect */ | |
325 | BIO_REFFED, /* bio has elevated ->bi_cnt */ | |
326 | BIO_THROTTLED, /* This bio has already been subjected to | |
8d2bbd4c | 327 | * throttling rules. Don't do it again. */ |
2b24e6f6 | 328 | BIO_TRACE_COMPLETION, /* bio_endio() should trace the final completion |
fbbaf700 | 329 | * of this bio. */ |
0376e9ef | 330 | BIO_CGROUP_ACCT, /* has been accounted to a cgroup */ |
aa1b46dc TH |
331 | BIO_QOS_THROTTLED, /* bio went through rq_qos throttle path */ |
332 | BIO_QOS_MERGED, /* but went through rq_qos merge path */ | |
30c5d345 | 333 | BIO_REMAPPED, |
9ffbbb43 | 334 | BIO_ZONE_WRITE_LOCKED, /* Owns a zoned device zone write lock */ |
2b24e6f6 JT |
335 | BIO_FLAG_LAST |
336 | }; | |
cd4a4ae4 | 337 | |
9a95e4ef BVA |
338 | typedef __u32 __bitwise blk_mq_req_flags_t; |
339 | ||
7cc01581 | 340 | /* |
ef295ecf CH |
341 | * Operations and flags common to the bio and request structures. |
342 | * We use 8 bits for encoding the operation, and the remaining 24 for flags. | |
87374179 CH |
343 | * |
344 | * The least significant bit of the operation number indicates the data | |
345 | * transfer direction: | |
346 | * | |
347 | * - if the least significant bit is set transfers are TO the device | |
348 | * - if the least significant bit is not set transfers are FROM the device | |
349 | * | |
350 | * If a operation does not transfer data the least significant bit has no | |
351 | * meaning. | |
7cc01581 | 352 | */ |
ef295ecf CH |
353 | #define REQ_OP_BITS 8 |
354 | #define REQ_OP_MASK ((1 << REQ_OP_BITS) - 1) | |
355 | #define REQ_FLAG_BITS 24 | |
356 | ||
357 | enum req_opf { | |
87374179 CH |
358 | /* read sectors from the device */ |
359 | REQ_OP_READ = 0, | |
360 | /* write sectors to the device */ | |
361 | REQ_OP_WRITE = 1, | |
362 | /* flush the volatile write cache */ | |
363 | REQ_OP_FLUSH = 2, | |
364 | /* discard sectors */ | |
365 | REQ_OP_DISCARD = 3, | |
87374179 CH |
366 | /* securely erase sectors */ |
367 | REQ_OP_SECURE_ERASE = 5, | |
a6f0788e | 368 | /* write the zero filled sector many times */ |
1d62ac13 | 369 | REQ_OP_WRITE_ZEROES = 9, |
6c1b1da5 AJ |
370 | /* Open a zone */ |
371 | REQ_OP_ZONE_OPEN = 10, | |
372 | /* Close a zone */ | |
373 | REQ_OP_ZONE_CLOSE = 11, | |
374 | /* Transition a zone to full */ | |
375 | REQ_OP_ZONE_FINISH = 12, | |
0512a75b KB |
376 | /* write data at the current zone write pointer */ |
377 | REQ_OP_ZONE_APPEND = 13, | |
ecdef9f4 CL |
378 | /* reset a zone write pointer */ |
379 | REQ_OP_ZONE_RESET = 15, | |
380 | /* reset all the zone present on the device */ | |
381 | REQ_OP_ZONE_RESET_ALL = 17, | |
ef295ecf | 382 | |
aebf526b CH |
383 | /* Driver private requests */ |
384 | REQ_OP_DRV_IN = 34, | |
385 | REQ_OP_DRV_OUT = 35, | |
386 | ||
ef295ecf CH |
387 | REQ_OP_LAST, |
388 | }; | |
389 | ||
390 | enum req_flag_bits { | |
391 | __REQ_FAILFAST_DEV = /* no driver retries of device errors */ | |
392 | REQ_OP_BITS, | |
7cc01581 TH |
393 | __REQ_FAILFAST_TRANSPORT, /* no driver retries of transport errors */ |
394 | __REQ_FAILFAST_DRIVER, /* no driver retries of driver errors */ | |
7cc01581 TH |
395 | __REQ_SYNC, /* request is sync (sync write or read) */ |
396 | __REQ_META, /* metadata io request */ | |
65299a3b | 397 | __REQ_PRIO, /* boost priority in cfq */ |
bd1c1c21 | 398 | __REQ_NOMERGE, /* don't touch this for merging */ |
a2b80967 | 399 | __REQ_IDLE, /* anticipate more IO after this one */ |
180b2f95 | 400 | __REQ_INTEGRITY, /* I/O includes block integrity payload */ |
8e4bf844 | 401 | __REQ_FUA, /* forced unit access */ |
28a8f0d3 | 402 | __REQ_PREFLUSH, /* request for cache flush */ |
188bd2b1 | 403 | __REQ_RAHEAD, /* read ahead, can fail anytime */ |
1d796d6a | 404 | __REQ_BACKGROUND, /* background IO */ |
8977f563 | 405 | __REQ_NOWAIT, /* Don't wait if request will block */ |
d3f77dfd TH |
406 | /* |
407 | * When a shared kthread needs to issue a bio for a cgroup, doing | |
408 | * so synchronously can lead to priority inversions as the kthread | |
409 | * can be trapped waiting for that cgroup. CGROUP_PUNT flag makes | |
410 | * submit_bio() punt the actual issuing to a dedicated per-blkcg | |
411 | * work item to avoid such priority inversions. | |
412 | */ | |
413 | __REQ_CGROUP_PUNT, | |
3e08773c | 414 | __REQ_POLLED, /* caller polls for completion using bio_poll */ |
0df71650 | 415 | __REQ_ALLOC_CACHE, /* allocate IO from cache if available */ |
5ce7729f CH |
416 | __REQ_SWAP, /* swap I/O */ |
417 | __REQ_DRV, /* for driver use */ | |
418 | ||
419 | /* | |
420 | * Command specific flags, keep last: | |
421 | */ | |
422 | /* for REQ_OP_WRITE_ZEROES: */ | |
423 | __REQ_NOUNMAP, /* do not free blocks when zeroing */ | |
d1e36282 | 424 | |
7cc01581 TH |
425 | __REQ_NR_BITS, /* stops here */ |
426 | }; | |
427 | ||
5953316d JA |
428 | #define REQ_FAILFAST_DEV (1ULL << __REQ_FAILFAST_DEV) |
429 | #define REQ_FAILFAST_TRANSPORT (1ULL << __REQ_FAILFAST_TRANSPORT) | |
430 | #define REQ_FAILFAST_DRIVER (1ULL << __REQ_FAILFAST_DRIVER) | |
431 | #define REQ_SYNC (1ULL << __REQ_SYNC) | |
432 | #define REQ_META (1ULL << __REQ_META) | |
433 | #define REQ_PRIO (1ULL << __REQ_PRIO) | |
ef295ecf | 434 | #define REQ_NOMERGE (1ULL << __REQ_NOMERGE) |
a2b80967 | 435 | #define REQ_IDLE (1ULL << __REQ_IDLE) |
180b2f95 | 436 | #define REQ_INTEGRITY (1ULL << __REQ_INTEGRITY) |
ef295ecf CH |
437 | #define REQ_FUA (1ULL << __REQ_FUA) |
438 | #define REQ_PREFLUSH (1ULL << __REQ_PREFLUSH) | |
439 | #define REQ_RAHEAD (1ULL << __REQ_RAHEAD) | |
1d796d6a | 440 | #define REQ_BACKGROUND (1ULL << __REQ_BACKGROUND) |
8977f563 | 441 | #define REQ_NOWAIT (1ULL << __REQ_NOWAIT) |
d3f77dfd TH |
442 | #define REQ_CGROUP_PUNT (1ULL << __REQ_CGROUP_PUNT) |
443 | ||
d928be9f | 444 | #define REQ_NOUNMAP (1ULL << __REQ_NOUNMAP) |
6ce913fe | 445 | #define REQ_POLLED (1ULL << __REQ_POLLED) |
0df71650 | 446 | #define REQ_ALLOC_CACHE (1ULL << __REQ_ALLOC_CACHE) |
d928be9f | 447 | |
96222bcc | 448 | #define REQ_DRV (1ULL << __REQ_DRV) |
0d1e0c7c | 449 | #define REQ_SWAP (1ULL << __REQ_SWAP) |
d928be9f | 450 | |
7cc01581 TH |
451 | #define REQ_FAILFAST_MASK \ |
452 | (REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER) | |
7cc01581 | 453 | |
e2a60da7 | 454 | #define REQ_NOMERGE_FLAGS \ |
e8064021 | 455 | (REQ_NOMERGE | REQ_PREFLUSH | REQ_FUA) |
e2a60da7 | 456 | |
dbae2c55 MC |
457 | enum stat_group { |
458 | STAT_READ, | |
459 | STAT_WRITE, | |
bdca3c87 | 460 | STAT_DISCARD, |
b6866318 | 461 | STAT_FLUSH, |
dbae2c55 MC |
462 | |
463 | NR_STAT_GROUPS | |
464 | }; | |
465 | ||
ef295ecf CH |
466 | #define bio_op(bio) \ |
467 | ((bio)->bi_opf & REQ_OP_MASK) | |
7cc01581 | 468 | |
ef295ecf | 469 | /* obsolete, don't use in new code */ |
93c5bdf7 CH |
470 | static inline void bio_set_op_attrs(struct bio *bio, unsigned op, |
471 | unsigned op_flags) | |
472 | { | |
473 | bio->bi_opf = op | op_flags; | |
474 | } | |
c11f0c0b | 475 | |
87374179 CH |
476 | static inline bool op_is_write(unsigned int op) |
477 | { | |
478 | return (op & 1); | |
479 | } | |
480 | ||
f73f44eb CH |
481 | /* |
482 | * Check if the bio or request is one that needs special treatment in the | |
483 | * flush state machine. | |
484 | */ | |
485 | static inline bool op_is_flush(unsigned int op) | |
486 | { | |
487 | return op & (REQ_FUA | REQ_PREFLUSH); | |
488 | } | |
489 | ||
b685d3d6 CH |
490 | /* |
491 | * Reads are always treated as synchronous, as are requests with the FUA or | |
492 | * PREFLUSH flag. Other operations may be marked as synchronous using the | |
493 | * REQ_SYNC flag. | |
494 | */ | |
ef295ecf CH |
495 | static inline bool op_is_sync(unsigned int op) |
496 | { | |
b685d3d6 CH |
497 | return (op & REQ_OP_MASK) == REQ_OP_READ || |
498 | (op & (REQ_SYNC | REQ_FUA | REQ_PREFLUSH)); | |
ef295ecf | 499 | } |
c11f0c0b | 500 | |
bdca3c87 MC |
501 | static inline bool op_is_discard(unsigned int op) |
502 | { | |
503 | return (op & REQ_OP_MASK) == REQ_OP_DISCARD; | |
504 | } | |
505 | ||
6c1b1da5 AJ |
506 | /* |
507 | * Check if a bio or request operation is a zone management operation, with | |
508 | * the exception of REQ_OP_ZONE_RESET_ALL which is treated as a special case | |
509 | * due to its different handling in the block layer and device response in | |
510 | * case of command failure. | |
511 | */ | |
512 | static inline bool op_is_zone_mgmt(enum req_opf op) | |
513 | { | |
514 | switch (op & REQ_OP_MASK) { | |
515 | case REQ_OP_ZONE_RESET: | |
516 | case REQ_OP_ZONE_OPEN: | |
517 | case REQ_OP_ZONE_CLOSE: | |
518 | case REQ_OP_ZONE_FINISH: | |
519 | return true; | |
520 | default: | |
521 | return false; | |
522 | } | |
523 | } | |
524 | ||
ddcf35d3 MC |
525 | static inline int op_stat_group(unsigned int op) |
526 | { | |
bdca3c87 MC |
527 | if (op_is_discard(op)) |
528 | return STAT_DISCARD; | |
ddcf35d3 MC |
529 | return op_is_write(op); |
530 | } | |
531 | ||
cf43e6be | 532 | struct blk_rq_stat { |
eca8b53a | 533 | u64 mean; |
cf43e6be JA |
534 | u64 min; |
535 | u64 max; | |
eca8b53a | 536 | u32 nr_samples; |
cf43e6be | 537 | u64 batch; |
cf43e6be JA |
538 | }; |
539 | ||
7cc01581 | 540 | #endif /* __LINUX_BLK_TYPES_H */ |