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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 | |
621c1f42 | 23 | struct block_device { |
29ff57c6 | 24 | sector_t bd_start_sect; |
15e3d2c5 CH |
25 | struct disk_stats __percpu *bd_stats; |
26 | unsigned long bd_stamp; | |
83950d35 | 27 | bool bd_read_only; /* read-only policy */ |
46d40cfa | 28 | dev_t bd_dev; |
621c1f42 CH |
29 | int bd_openers; |
30 | struct inode * bd_inode; /* will die */ | |
31 | struct super_block * bd_super; | |
32 | struct mutex bd_mutex; /* open/close mutex */ | |
33 | void * bd_claiming; | |
0d02129e | 34 | struct device bd_device; |
621c1f42 CH |
35 | void * bd_holder; |
36 | int bd_holders; | |
37 | bool bd_write_holder; | |
38 | #ifdef CONFIG_SYSFS | |
39 | struct list_head bd_holder_disks; | |
40 | #endif | |
1bdd5ae0 | 41 | struct kobject *bd_holder_dir; |
621c1f42 | 42 | u8 bd_partno; |
621c1f42 CH |
43 | /* number of times partitions within this device have been opened. */ |
44 | unsigned bd_part_count; | |
38430f08 | 45 | |
c2b4bb8c | 46 | spinlock_t bd_size_lock; /* for bd_inode->i_size updates */ |
621c1f42 | 47 | struct gendisk * bd_disk; |
621c1f42 | 48 | struct backing_dev_info *bd_bdi; |
621c1f42 CH |
49 | |
50 | /* The counter of freeze processes */ | |
51 | int bd_fsfreeze_count; | |
52 | /* Mutex for freeze */ | |
53 | struct mutex bd_fsfreeze_mutex; | |
040f04bd | 54 | struct super_block *bd_fsfreeze_sb; |
231926db CH |
55 | |
56 | struct partition_meta_info *bd_meta_info; | |
b309e993 CH |
57 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
58 | bool bd_make_it_fail; | |
59 | #endif | |
621c1f42 CH |
60 | } __randomize_layout; |
61 | ||
a954ea81 | 62 | #define bdev_whole(_bdev) \ |
cb8432d6 | 63 | ((_bdev)->bd_disk->part0) |
a954ea81 | 64 | |
0d02129e CH |
65 | #define dev_to_bdev(device) \ |
66 | container_of((device), struct block_device, bd_device) | |
67 | ||
8d65269f | 68 | #define bdev_kobj(_bdev) \ |
0d02129e | 69 | (&((_bdev)->bd_device.kobj)) |
8d65269f | 70 | |
2a842aca CH |
71 | /* |
72 | * Block error status values. See block/blk-core:blk_errors for the details. | |
6e2fb221 | 73 | * Alpha cannot write a byte atomically, so we need to use 32-bit value. |
2a842aca | 74 | */ |
6e2fb221 MP |
75 | #if defined(CONFIG_ALPHA) && !defined(__alpha_bwx__) |
76 | typedef u32 __bitwise blk_status_t; | |
77 | #else | |
2a842aca | 78 | typedef u8 __bitwise blk_status_t; |
6e2fb221 | 79 | #endif |
2a842aca CH |
80 | #define BLK_STS_OK 0 |
81 | #define BLK_STS_NOTSUPP ((__force blk_status_t)1) | |
82 | #define BLK_STS_TIMEOUT ((__force blk_status_t)2) | |
83 | #define BLK_STS_NOSPC ((__force blk_status_t)3) | |
84 | #define BLK_STS_TRANSPORT ((__force blk_status_t)4) | |
85 | #define BLK_STS_TARGET ((__force blk_status_t)5) | |
86 | #define BLK_STS_NEXUS ((__force blk_status_t)6) | |
87 | #define BLK_STS_MEDIUM ((__force blk_status_t)7) | |
88 | #define BLK_STS_PROTECTION ((__force blk_status_t)8) | |
89 | #define BLK_STS_RESOURCE ((__force blk_status_t)9) | |
90 | #define BLK_STS_IOERR ((__force blk_status_t)10) | |
91 | ||
4e4cbee9 CH |
92 | /* hack for device mapper, don't use elsewhere: */ |
93 | #define BLK_STS_DM_REQUEUE ((__force blk_status_t)11) | |
94 | ||
03a07c92 GR |
95 | #define BLK_STS_AGAIN ((__force blk_status_t)12) |
96 | ||
86ff7c2a ML |
97 | /* |
98 | * BLK_STS_DEV_RESOURCE is returned from the driver to the block layer if | |
99 | * device related resources are unavailable, but the driver can guarantee | |
100 | * that the queue will be rerun in the future once resources become | |
101 | * available again. This is typically the case for device specific | |
102 | * resources that are consumed for IO. If the driver fails allocating these | |
103 | * resources, we know that inflight (or pending) IO will free these | |
104 | * resource upon completion. | |
105 | * | |
106 | * This is different from BLK_STS_RESOURCE in that it explicitly references | |
107 | * a device specific resource. For resources of wider scope, allocation | |
108 | * failure can happen without having pending IO. This means that we can't | |
109 | * rely on request completions freeing these resources, as IO may not be in | |
110 | * flight. Examples of that are kernel memory allocations, DMA mappings, or | |
111 | * any other system wide resources. | |
112 | */ | |
113 | #define BLK_STS_DEV_RESOURCE ((__force blk_status_t)13) | |
114 | ||
0512a75b KB |
115 | /* |
116 | * BLK_STS_ZONE_RESOURCE is returned from the driver to the block layer if zone | |
117 | * related resources are unavailable, but the driver can guarantee the queue | |
118 | * will be rerun in the future once the resources become available again. | |
119 | * | |
120 | * This is different from BLK_STS_DEV_RESOURCE in that it explicitly references | |
121 | * a zone specific resource and IO to a different zone on the same device could | |
122 | * still be served. Examples of that are zones that are write-locked, but a read | |
123 | * to the same zone could be served. | |
124 | */ | |
125 | #define BLK_STS_ZONE_RESOURCE ((__force blk_status_t)14) | |
126 | ||
3b481d91 KB |
127 | /* |
128 | * BLK_STS_ZONE_OPEN_RESOURCE is returned from the driver in the completion | |
129 | * path if the device returns a status indicating that too many zone resources | |
130 | * are currently open. The same command should be successful if resubmitted | |
131 | * after the number of open zones decreases below the device's limits, which is | |
132 | * reported in the request_queue's max_open_zones. | |
133 | */ | |
134 | #define BLK_STS_ZONE_OPEN_RESOURCE ((__force blk_status_t)15) | |
135 | ||
136 | /* | |
137 | * BLK_STS_ZONE_ACTIVE_RESOURCE is returned from the driver in the completion | |
138 | * path if the device returns a status indicating that too many zone resources | |
139 | * are currently active. The same command should be successful if resubmitted | |
140 | * after the number of active zones decreases below the device's limits, which | |
141 | * is reported in the request_queue's max_active_zones. | |
142 | */ | |
143 | #define BLK_STS_ZONE_ACTIVE_RESOURCE ((__force blk_status_t)16) | |
144 | ||
9111e568 KB |
145 | /** |
146 | * blk_path_error - returns true if error may be path related | |
147 | * @error: status the request was completed with | |
148 | * | |
149 | * Description: | |
150 | * This classifies block error status into non-retryable errors and ones | |
151 | * that may be successful if retried on a failover path. | |
152 | * | |
153 | * Return: | |
154 | * %false - retrying failover path will not help | |
155 | * %true - may succeed if retried | |
156 | */ | |
157 | static inline bool blk_path_error(blk_status_t error) | |
158 | { | |
159 | switch (error) { | |
160 | case BLK_STS_NOTSUPP: | |
161 | case BLK_STS_NOSPC: | |
162 | case BLK_STS_TARGET: | |
163 | case BLK_STS_NEXUS: | |
164 | case BLK_STS_MEDIUM: | |
165 | case BLK_STS_PROTECTION: | |
166 | return false; | |
167 | } | |
168 | ||
169 | /* Anything else could be a path failure, so should be retried */ | |
170 | return true; | |
171 | } | |
172 | ||
5238dcf4 OS |
173 | /* |
174 | * From most significant bit: | |
175 | * 1 bit: reserved for other usage, see below | |
176 | * 12 bits: original size of bio | |
177 | * 51 bits: issue time of bio | |
178 | */ | |
179 | #define BIO_ISSUE_RES_BITS 1 | |
180 | #define BIO_ISSUE_SIZE_BITS 12 | |
181 | #define BIO_ISSUE_RES_SHIFT (64 - BIO_ISSUE_RES_BITS) | |
182 | #define BIO_ISSUE_SIZE_SHIFT (BIO_ISSUE_RES_SHIFT - BIO_ISSUE_SIZE_BITS) | |
183 | #define BIO_ISSUE_TIME_MASK ((1ULL << BIO_ISSUE_SIZE_SHIFT) - 1) | |
184 | #define BIO_ISSUE_SIZE_MASK \ | |
185 | (((1ULL << BIO_ISSUE_SIZE_BITS) - 1) << BIO_ISSUE_SIZE_SHIFT) | |
186 | #define BIO_ISSUE_RES_MASK (~((1ULL << BIO_ISSUE_RES_SHIFT) - 1)) | |
187 | ||
188 | /* Reserved bit for blk-throtl */ | |
189 | #define BIO_ISSUE_THROTL_SKIP_LATENCY (1ULL << 63) | |
190 | ||
191 | struct bio_issue { | |
192 | u64 value; | |
193 | }; | |
194 | ||
195 | static inline u64 __bio_issue_time(u64 time) | |
196 | { | |
197 | return time & BIO_ISSUE_TIME_MASK; | |
198 | } | |
199 | ||
200 | static inline u64 bio_issue_time(struct bio_issue *issue) | |
201 | { | |
202 | return __bio_issue_time(issue->value); | |
203 | } | |
204 | ||
205 | static inline sector_t bio_issue_size(struct bio_issue *issue) | |
206 | { | |
207 | return ((issue->value & BIO_ISSUE_SIZE_MASK) >> BIO_ISSUE_SIZE_SHIFT); | |
208 | } | |
209 | ||
210 | static inline void bio_issue_init(struct bio_issue *issue, | |
211 | sector_t size) | |
212 | { | |
213 | size &= (1ULL << BIO_ISSUE_SIZE_BITS) - 1; | |
214 | issue->value = ((issue->value & BIO_ISSUE_RES_MASK) | | |
215 | (ktime_get_ns() & BIO_ISSUE_TIME_MASK) | | |
216 | ((u64)size << BIO_ISSUE_SIZE_SHIFT)); | |
217 | } | |
218 | ||
7cc01581 TH |
219 | /* |
220 | * main unit of I/O for the block layer and lower layers (ie drivers and | |
221 | * stacking drivers) | |
222 | */ | |
223 | struct bio { | |
7cc01581 | 224 | struct bio *bi_next; /* request queue link */ |
309dca30 | 225 | struct block_device *bi_bdev; |
1eff9d32 JA |
226 | unsigned int bi_opf; /* bottom bits req flags, |
227 | * top bits REQ_OP. Use | |
228 | * accessors. | |
4e1b2d52 | 229 | */ |
7a800a20 | 230 | unsigned short bi_flags; /* BIO_* below */ |
43b62ce3 | 231 | unsigned short bi_ioprio; |
cb6934f8 | 232 | unsigned short bi_write_hint; |
111be883 | 233 | blk_status_t bi_status; |
993e4cde | 234 | atomic_t __bi_remaining; |
7cc01581 | 235 | |
111be883 | 236 | struct bvec_iter bi_iter; |
196d38bc | 237 | |
7cc01581 TH |
238 | bio_end_io_t *bi_end_io; |
239 | ||
240 | void *bi_private; | |
852c788f TH |
241 | #ifdef CONFIG_BLK_CGROUP |
242 | /* | |
db6638d7 DZ |
243 | * Represents the association of the css and request_queue for the bio. |
244 | * If a bio goes direct to device, it will not have a blkg as it will | |
245 | * not have a request_queue associated with it. The reference is put | |
246 | * on release of the bio. | |
852c788f | 247 | */ |
08e18eab | 248 | struct blkcg_gq *bi_blkg; |
5238dcf4 | 249 | struct bio_issue bi_issue; |
7caa4715 TH |
250 | #ifdef CONFIG_BLK_CGROUP_IOCOST |
251 | u64 bi_iocost_cost; | |
252 | #endif | |
852c788f | 253 | #endif |
a892c8d5 ST |
254 | |
255 | #ifdef CONFIG_BLK_INLINE_ENCRYPTION | |
256 | struct bio_crypt_ctx *bi_crypt_context; | |
257 | #endif | |
258 | ||
180b2f95 | 259 | union { |
7cc01581 | 260 | #if defined(CONFIG_BLK_DEV_INTEGRITY) |
180b2f95 | 261 | struct bio_integrity_payload *bi_integrity; /* data integrity */ |
7cc01581 | 262 | #endif |
180b2f95 | 263 | }; |
7cc01581 | 264 | |
4f024f37 KO |
265 | unsigned short bi_vcnt; /* how many bio_vec's */ |
266 | ||
f44b48c7 KO |
267 | /* |
268 | * Everything starting with bi_max_vecs will be preserved by bio_reset() | |
269 | */ | |
270 | ||
4f024f37 | 271 | unsigned short bi_max_vecs; /* max bvl_vecs we can hold */ |
f44b48c7 | 272 | |
dac56212 | 273 | atomic_t __bi_cnt; /* pin count */ |
f44b48c7 KO |
274 | |
275 | struct bio_vec *bi_io_vec; /* the actual vec list */ | |
276 | ||
395c72a7 KO |
277 | struct bio_set *bi_pool; |
278 | ||
7cc01581 TH |
279 | /* |
280 | * We can inline a number of vecs at the end of the bio, to avoid | |
281 | * double allocations for a small number of bio_vecs. This member | |
282 | * MUST obviously be kept at the very end of the bio. | |
283 | */ | |
5a58ec8c | 284 | struct bio_vec bi_inline_vecs[]; |
7cc01581 TH |
285 | }; |
286 | ||
f44b48c7 KO |
287 | #define BIO_RESET_BYTES offsetof(struct bio, bi_max_vecs) |
288 | ||
7cc01581 TH |
289 | /* |
290 | * bio flags | |
291 | */ | |
2b24e6f6 JT |
292 | enum { |
293 | BIO_NO_PAGE_REF, /* don't put release vec pages */ | |
2b24e6f6 JT |
294 | BIO_CLONED, /* doesn't own data */ |
295 | BIO_BOUNCED, /* bio is a bounce bio */ | |
b8e24a93 | 296 | BIO_WORKINGSET, /* contains userspace workingset pages */ |
2b24e6f6 JT |
297 | BIO_QUIET, /* Make BIO Quiet */ |
298 | BIO_CHAIN, /* chained bio, ->bi_remaining in effect */ | |
299 | BIO_REFFED, /* bio has elevated ->bi_cnt */ | |
300 | BIO_THROTTLED, /* This bio has already been subjected to | |
8d2bbd4c | 301 | * throttling rules. Don't do it again. */ |
2b24e6f6 | 302 | BIO_TRACE_COMPLETION, /* bio_endio() should trace the final completion |
fbbaf700 | 303 | * of this bio. */ |
0376e9ef | 304 | BIO_CGROUP_ACCT, /* has been accounted to a cgroup */ |
2b24e6f6 | 305 | BIO_TRACKED, /* set if bio goes through the rq_qos path */ |
30c5d345 | 306 | BIO_REMAPPED, |
2b24e6f6 JT |
307 | BIO_FLAG_LAST |
308 | }; | |
cd4a4ae4 | 309 | |
9a95e4ef BVA |
310 | typedef __u32 __bitwise blk_mq_req_flags_t; |
311 | ||
7cc01581 | 312 | /* |
ef295ecf CH |
313 | * Operations and flags common to the bio and request structures. |
314 | * We use 8 bits for encoding the operation, and the remaining 24 for flags. | |
87374179 CH |
315 | * |
316 | * The least significant bit of the operation number indicates the data | |
317 | * transfer direction: | |
318 | * | |
319 | * - if the least significant bit is set transfers are TO the device | |
320 | * - if the least significant bit is not set transfers are FROM the device | |
321 | * | |
322 | * If a operation does not transfer data the least significant bit has no | |
323 | * meaning. | |
7cc01581 | 324 | */ |
ef295ecf CH |
325 | #define REQ_OP_BITS 8 |
326 | #define REQ_OP_MASK ((1 << REQ_OP_BITS) - 1) | |
327 | #define REQ_FLAG_BITS 24 | |
328 | ||
329 | enum req_opf { | |
87374179 CH |
330 | /* read sectors from the device */ |
331 | REQ_OP_READ = 0, | |
332 | /* write sectors to the device */ | |
333 | REQ_OP_WRITE = 1, | |
334 | /* flush the volatile write cache */ | |
335 | REQ_OP_FLUSH = 2, | |
336 | /* discard sectors */ | |
337 | REQ_OP_DISCARD = 3, | |
87374179 CH |
338 | /* securely erase sectors */ |
339 | REQ_OP_SECURE_ERASE = 5, | |
87374179 CH |
340 | /* write the same sector many times */ |
341 | REQ_OP_WRITE_SAME = 7, | |
a6f0788e | 342 | /* write the zero filled sector many times */ |
1d62ac13 | 343 | REQ_OP_WRITE_ZEROES = 9, |
6c1b1da5 AJ |
344 | /* Open a zone */ |
345 | REQ_OP_ZONE_OPEN = 10, | |
346 | /* Close a zone */ | |
347 | REQ_OP_ZONE_CLOSE = 11, | |
348 | /* Transition a zone to full */ | |
349 | REQ_OP_ZONE_FINISH = 12, | |
0512a75b KB |
350 | /* write data at the current zone write pointer */ |
351 | REQ_OP_ZONE_APPEND = 13, | |
ecdef9f4 CL |
352 | /* reset a zone write pointer */ |
353 | REQ_OP_ZONE_RESET = 15, | |
354 | /* reset all the zone present on the device */ | |
355 | REQ_OP_ZONE_RESET_ALL = 17, | |
ef295ecf | 356 | |
aebf526b CH |
357 | /* SCSI passthrough using struct scsi_request */ |
358 | REQ_OP_SCSI_IN = 32, | |
359 | REQ_OP_SCSI_OUT = 33, | |
360 | /* Driver private requests */ | |
361 | REQ_OP_DRV_IN = 34, | |
362 | REQ_OP_DRV_OUT = 35, | |
363 | ||
ef295ecf CH |
364 | REQ_OP_LAST, |
365 | }; | |
366 | ||
367 | enum req_flag_bits { | |
368 | __REQ_FAILFAST_DEV = /* no driver retries of device errors */ | |
369 | REQ_OP_BITS, | |
7cc01581 TH |
370 | __REQ_FAILFAST_TRANSPORT, /* no driver retries of transport errors */ |
371 | __REQ_FAILFAST_DRIVER, /* no driver retries of driver errors */ | |
7cc01581 TH |
372 | __REQ_SYNC, /* request is sync (sync write or read) */ |
373 | __REQ_META, /* metadata io request */ | |
65299a3b | 374 | __REQ_PRIO, /* boost priority in cfq */ |
bd1c1c21 | 375 | __REQ_NOMERGE, /* don't touch this for merging */ |
a2b80967 | 376 | __REQ_IDLE, /* anticipate more IO after this one */ |
180b2f95 | 377 | __REQ_INTEGRITY, /* I/O includes block integrity payload */ |
8e4bf844 | 378 | __REQ_FUA, /* forced unit access */ |
28a8f0d3 | 379 | __REQ_PREFLUSH, /* request for cache flush */ |
188bd2b1 | 380 | __REQ_RAHEAD, /* read ahead, can fail anytime */ |
1d796d6a | 381 | __REQ_BACKGROUND, /* background IO */ |
8977f563 | 382 | __REQ_NOWAIT, /* Don't wait if request will block */ |
d3f77dfd TH |
383 | /* |
384 | * When a shared kthread needs to issue a bio for a cgroup, doing | |
385 | * so synchronously can lead to priority inversions as the kthread | |
386 | * can be trapped waiting for that cgroup. CGROUP_PUNT flag makes | |
387 | * submit_bio() punt the actual issuing to a dedicated per-blkcg | |
388 | * work item to avoid such priority inversions. | |
389 | */ | |
390 | __REQ_CGROUP_PUNT, | |
d928be9f CH |
391 | |
392 | /* command specific flags for REQ_OP_WRITE_ZEROES: */ | |
393 | __REQ_NOUNMAP, /* do not free blocks when zeroing */ | |
394 | ||
d1e36282 JA |
395 | __REQ_HIPRI, |
396 | ||
96222bcc CH |
397 | /* for driver use */ |
398 | __REQ_DRV, | |
0d1e0c7c | 399 | __REQ_SWAP, /* swapping request. */ |
7cc01581 TH |
400 | __REQ_NR_BITS, /* stops here */ |
401 | }; | |
402 | ||
5953316d JA |
403 | #define REQ_FAILFAST_DEV (1ULL << __REQ_FAILFAST_DEV) |
404 | #define REQ_FAILFAST_TRANSPORT (1ULL << __REQ_FAILFAST_TRANSPORT) | |
405 | #define REQ_FAILFAST_DRIVER (1ULL << __REQ_FAILFAST_DRIVER) | |
406 | #define REQ_SYNC (1ULL << __REQ_SYNC) | |
407 | #define REQ_META (1ULL << __REQ_META) | |
408 | #define REQ_PRIO (1ULL << __REQ_PRIO) | |
ef295ecf | 409 | #define REQ_NOMERGE (1ULL << __REQ_NOMERGE) |
a2b80967 | 410 | #define REQ_IDLE (1ULL << __REQ_IDLE) |
180b2f95 | 411 | #define REQ_INTEGRITY (1ULL << __REQ_INTEGRITY) |
ef295ecf CH |
412 | #define REQ_FUA (1ULL << __REQ_FUA) |
413 | #define REQ_PREFLUSH (1ULL << __REQ_PREFLUSH) | |
414 | #define REQ_RAHEAD (1ULL << __REQ_RAHEAD) | |
1d796d6a | 415 | #define REQ_BACKGROUND (1ULL << __REQ_BACKGROUND) |
8977f563 | 416 | #define REQ_NOWAIT (1ULL << __REQ_NOWAIT) |
d3f77dfd TH |
417 | #define REQ_CGROUP_PUNT (1ULL << __REQ_CGROUP_PUNT) |
418 | ||
d928be9f | 419 | #define REQ_NOUNMAP (1ULL << __REQ_NOUNMAP) |
d1e36282 | 420 | #define REQ_HIPRI (1ULL << __REQ_HIPRI) |
d928be9f | 421 | |
96222bcc | 422 | #define REQ_DRV (1ULL << __REQ_DRV) |
0d1e0c7c | 423 | #define REQ_SWAP (1ULL << __REQ_SWAP) |
d928be9f | 424 | |
7cc01581 TH |
425 | #define REQ_FAILFAST_MASK \ |
426 | (REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER) | |
7cc01581 | 427 | |
e2a60da7 | 428 | #define REQ_NOMERGE_FLAGS \ |
e8064021 | 429 | (REQ_NOMERGE | REQ_PREFLUSH | REQ_FUA) |
e2a60da7 | 430 | |
dbae2c55 MC |
431 | enum stat_group { |
432 | STAT_READ, | |
433 | STAT_WRITE, | |
bdca3c87 | 434 | STAT_DISCARD, |
b6866318 | 435 | STAT_FLUSH, |
dbae2c55 MC |
436 | |
437 | NR_STAT_GROUPS | |
438 | }; | |
439 | ||
ef295ecf CH |
440 | #define bio_op(bio) \ |
441 | ((bio)->bi_opf & REQ_OP_MASK) | |
442 | #define req_op(req) \ | |
443 | ((req)->cmd_flags & REQ_OP_MASK) | |
7cc01581 | 444 | |
ef295ecf | 445 | /* obsolete, don't use in new code */ |
93c5bdf7 CH |
446 | static inline void bio_set_op_attrs(struct bio *bio, unsigned op, |
447 | unsigned op_flags) | |
448 | { | |
449 | bio->bi_opf = op | op_flags; | |
450 | } | |
c11f0c0b | 451 | |
87374179 CH |
452 | static inline bool op_is_write(unsigned int op) |
453 | { | |
454 | return (op & 1); | |
455 | } | |
456 | ||
f73f44eb CH |
457 | /* |
458 | * Check if the bio or request is one that needs special treatment in the | |
459 | * flush state machine. | |
460 | */ | |
461 | static inline bool op_is_flush(unsigned int op) | |
462 | { | |
463 | return op & (REQ_FUA | REQ_PREFLUSH); | |
464 | } | |
465 | ||
b685d3d6 CH |
466 | /* |
467 | * Reads are always treated as synchronous, as are requests with the FUA or | |
468 | * PREFLUSH flag. Other operations may be marked as synchronous using the | |
469 | * REQ_SYNC flag. | |
470 | */ | |
ef295ecf CH |
471 | static inline bool op_is_sync(unsigned int op) |
472 | { | |
b685d3d6 CH |
473 | return (op & REQ_OP_MASK) == REQ_OP_READ || |
474 | (op & (REQ_SYNC | REQ_FUA | REQ_PREFLUSH)); | |
ef295ecf | 475 | } |
c11f0c0b | 476 | |
bdca3c87 MC |
477 | static inline bool op_is_discard(unsigned int op) |
478 | { | |
479 | return (op & REQ_OP_MASK) == REQ_OP_DISCARD; | |
480 | } | |
481 | ||
6c1b1da5 AJ |
482 | /* |
483 | * Check if a bio or request operation is a zone management operation, with | |
484 | * the exception of REQ_OP_ZONE_RESET_ALL which is treated as a special case | |
485 | * due to its different handling in the block layer and device response in | |
486 | * case of command failure. | |
487 | */ | |
488 | static inline bool op_is_zone_mgmt(enum req_opf op) | |
489 | { | |
490 | switch (op & REQ_OP_MASK) { | |
491 | case REQ_OP_ZONE_RESET: | |
492 | case REQ_OP_ZONE_OPEN: | |
493 | case REQ_OP_ZONE_CLOSE: | |
494 | case REQ_OP_ZONE_FINISH: | |
495 | return true; | |
496 | default: | |
497 | return false; | |
498 | } | |
499 | } | |
500 | ||
ddcf35d3 MC |
501 | static inline int op_stat_group(unsigned int op) |
502 | { | |
bdca3c87 MC |
503 | if (op_is_discard(op)) |
504 | return STAT_DISCARD; | |
ddcf35d3 MC |
505 | return op_is_write(op); |
506 | } | |
507 | ||
dece1635 | 508 | typedef unsigned int blk_qc_t; |
fd2d3326 JA |
509 | #define BLK_QC_T_NONE -1U |
510 | #define BLK_QC_T_SHIFT 16 | |
511 | #define BLK_QC_T_INTERNAL (1U << 31) | |
dece1635 JA |
512 | |
513 | static inline bool blk_qc_t_valid(blk_qc_t cookie) | |
514 | { | |
3aab9177 | 515 | return cookie != BLK_QC_T_NONE; |
dece1635 JA |
516 | } |
517 | ||
dece1635 JA |
518 | static inline unsigned int blk_qc_t_to_queue_num(blk_qc_t cookie) |
519 | { | |
fd2d3326 | 520 | return (cookie & ~BLK_QC_T_INTERNAL) >> BLK_QC_T_SHIFT; |
dece1635 JA |
521 | } |
522 | ||
523 | static inline unsigned int blk_qc_t_to_tag(blk_qc_t cookie) | |
524 | { | |
e3a7a3bf | 525 | return cookie & ((1u << BLK_QC_T_SHIFT) - 1); |
dece1635 JA |
526 | } |
527 | ||
fd2d3326 JA |
528 | static inline bool blk_qc_t_is_internal(blk_qc_t cookie) |
529 | { | |
530 | return (cookie & BLK_QC_T_INTERNAL) != 0; | |
531 | } | |
532 | ||
cf43e6be | 533 | struct blk_rq_stat { |
eca8b53a | 534 | u64 mean; |
cf43e6be JA |
535 | u64 min; |
536 | u64 max; | |
eca8b53a | 537 | u32 nr_samples; |
cf43e6be | 538 | u64 batch; |
cf43e6be JA |
539 | }; |
540 | ||
7cc01581 | 541 | #endif /* __LINUX_BLK_TYPES_H */ |