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> |
5238dcf4 | 11 | #include <linux/ktime.h> |
7cc01581 TH |
12 | |
13 | struct bio_set; | |
14 | struct bio; | |
15 | struct bio_integrity_payload; | |
16 | struct page; | |
852c788f TH |
17 | struct io_context; |
18 | struct cgroup_subsys_state; | |
4246a0b6 | 19 | typedef void (bio_end_io_t) (struct bio *); |
a892c8d5 | 20 | struct bio_crypt_ctx; |
7cc01581 | 21 | |
621c1f42 | 22 | struct block_device { |
29ff57c6 | 23 | sector_t bd_start_sect; |
15e3d2c5 CH |
24 | struct disk_stats __percpu *bd_stats; |
25 | unsigned long bd_stamp; | |
46d40cfa | 26 | dev_t bd_dev; |
621c1f42 CH |
27 | int bd_openers; |
28 | struct inode * bd_inode; /* will die */ | |
29 | struct super_block * bd_super; | |
30 | struct mutex bd_mutex; /* open/close mutex */ | |
31 | void * bd_claiming; | |
32 | void * bd_holder; | |
33 | int bd_holders; | |
34 | bool bd_write_holder; | |
35 | #ifdef CONFIG_SYSFS | |
36 | struct list_head bd_holder_disks; | |
37 | #endif | |
1bdd5ae0 | 38 | struct kobject *bd_holder_dir; |
621c1f42 CH |
39 | u8 bd_partno; |
40 | struct hd_struct * bd_part; | |
41 | /* number of times partitions within this device have been opened. */ | |
42 | unsigned bd_part_count; | |
38430f08 | 43 | |
c2b4bb8c | 44 | spinlock_t bd_size_lock; /* for bd_inode->i_size updates */ |
621c1f42 | 45 | struct gendisk * bd_disk; |
621c1f42 | 46 | struct backing_dev_info *bd_bdi; |
621c1f42 CH |
47 | |
48 | /* The counter of freeze processes */ | |
49 | int bd_fsfreeze_count; | |
50 | /* Mutex for freeze */ | |
51 | struct mutex bd_fsfreeze_mutex; | |
040f04bd | 52 | struct super_block *bd_fsfreeze_sb; |
231926db CH |
53 | |
54 | struct partition_meta_info *bd_meta_info; | |
621c1f42 CH |
55 | } __randomize_layout; |
56 | ||
a954ea81 CH |
57 | #define bdev_whole(_bdev) \ |
58 | ((_bdev)->bd_disk->part0.bdev) | |
59 | ||
8d65269f CH |
60 | #define bdev_kobj(_bdev) \ |
61 | (&part_to_dev((_bdev)->bd_part)->kobj) | |
62 | ||
2a842aca CH |
63 | /* |
64 | * Block error status values. See block/blk-core:blk_errors for the details. | |
6e2fb221 | 65 | * Alpha cannot write a byte atomically, so we need to use 32-bit value. |
2a842aca | 66 | */ |
6e2fb221 MP |
67 | #if defined(CONFIG_ALPHA) && !defined(__alpha_bwx__) |
68 | typedef u32 __bitwise blk_status_t; | |
69 | #else | |
2a842aca | 70 | typedef u8 __bitwise blk_status_t; |
6e2fb221 | 71 | #endif |
2a842aca CH |
72 | #define BLK_STS_OK 0 |
73 | #define BLK_STS_NOTSUPP ((__force blk_status_t)1) | |
74 | #define BLK_STS_TIMEOUT ((__force blk_status_t)2) | |
75 | #define BLK_STS_NOSPC ((__force blk_status_t)3) | |
76 | #define BLK_STS_TRANSPORT ((__force blk_status_t)4) | |
77 | #define BLK_STS_TARGET ((__force blk_status_t)5) | |
78 | #define BLK_STS_NEXUS ((__force blk_status_t)6) | |
79 | #define BLK_STS_MEDIUM ((__force blk_status_t)7) | |
80 | #define BLK_STS_PROTECTION ((__force blk_status_t)8) | |
81 | #define BLK_STS_RESOURCE ((__force blk_status_t)9) | |
82 | #define BLK_STS_IOERR ((__force blk_status_t)10) | |
83 | ||
4e4cbee9 CH |
84 | /* hack for device mapper, don't use elsewhere: */ |
85 | #define BLK_STS_DM_REQUEUE ((__force blk_status_t)11) | |
86 | ||
03a07c92 GR |
87 | #define BLK_STS_AGAIN ((__force blk_status_t)12) |
88 | ||
86ff7c2a ML |
89 | /* |
90 | * BLK_STS_DEV_RESOURCE is returned from the driver to the block layer if | |
91 | * device related resources are unavailable, but the driver can guarantee | |
92 | * that the queue will be rerun in the future once resources become | |
93 | * available again. This is typically the case for device specific | |
94 | * resources that are consumed for IO. If the driver fails allocating these | |
95 | * resources, we know that inflight (or pending) IO will free these | |
96 | * resource upon completion. | |
97 | * | |
98 | * This is different from BLK_STS_RESOURCE in that it explicitly references | |
99 | * a device specific resource. For resources of wider scope, allocation | |
100 | * failure can happen without having pending IO. This means that we can't | |
101 | * rely on request completions freeing these resources, as IO may not be in | |
102 | * flight. Examples of that are kernel memory allocations, DMA mappings, or | |
103 | * any other system wide resources. | |
104 | */ | |
105 | #define BLK_STS_DEV_RESOURCE ((__force blk_status_t)13) | |
106 | ||
0512a75b KB |
107 | /* |
108 | * BLK_STS_ZONE_RESOURCE is returned from the driver to the block layer if zone | |
109 | * related resources are unavailable, but the driver can guarantee the queue | |
110 | * will be rerun in the future once the resources become available again. | |
111 | * | |
112 | * This is different from BLK_STS_DEV_RESOURCE in that it explicitly references | |
113 | * a zone specific resource and IO to a different zone on the same device could | |
114 | * still be served. Examples of that are zones that are write-locked, but a read | |
115 | * to the same zone could be served. | |
116 | */ | |
117 | #define BLK_STS_ZONE_RESOURCE ((__force blk_status_t)14) | |
118 | ||
3b481d91 KB |
119 | /* |
120 | * BLK_STS_ZONE_OPEN_RESOURCE is returned from the driver in the completion | |
121 | * path if the device returns a status indicating that too many zone resources | |
122 | * are currently open. The same command should be successful if resubmitted | |
123 | * after the number of open zones decreases below the device's limits, which is | |
124 | * reported in the request_queue's max_open_zones. | |
125 | */ | |
126 | #define BLK_STS_ZONE_OPEN_RESOURCE ((__force blk_status_t)15) | |
127 | ||
128 | /* | |
129 | * BLK_STS_ZONE_ACTIVE_RESOURCE is returned from the driver in the completion | |
130 | * path if the device returns a status indicating that too many zone resources | |
131 | * are currently active. The same command should be successful if resubmitted | |
132 | * after the number of active zones decreases below the device's limits, which | |
133 | * is reported in the request_queue's max_active_zones. | |
134 | */ | |
135 | #define BLK_STS_ZONE_ACTIVE_RESOURCE ((__force blk_status_t)16) | |
136 | ||
9111e568 KB |
137 | /** |
138 | * blk_path_error - returns true if error may be path related | |
139 | * @error: status the request was completed with | |
140 | * | |
141 | * Description: | |
142 | * This classifies block error status into non-retryable errors and ones | |
143 | * that may be successful if retried on a failover path. | |
144 | * | |
145 | * Return: | |
146 | * %false - retrying failover path will not help | |
147 | * %true - may succeed if retried | |
148 | */ | |
149 | static inline bool blk_path_error(blk_status_t error) | |
150 | { | |
151 | switch (error) { | |
152 | case BLK_STS_NOTSUPP: | |
153 | case BLK_STS_NOSPC: | |
154 | case BLK_STS_TARGET: | |
155 | case BLK_STS_NEXUS: | |
156 | case BLK_STS_MEDIUM: | |
157 | case BLK_STS_PROTECTION: | |
158 | return false; | |
159 | } | |
160 | ||
161 | /* Anything else could be a path failure, so should be retried */ | |
162 | return true; | |
163 | } | |
164 | ||
5238dcf4 OS |
165 | /* |
166 | * From most significant bit: | |
167 | * 1 bit: reserved for other usage, see below | |
168 | * 12 bits: original size of bio | |
169 | * 51 bits: issue time of bio | |
170 | */ | |
171 | #define BIO_ISSUE_RES_BITS 1 | |
172 | #define BIO_ISSUE_SIZE_BITS 12 | |
173 | #define BIO_ISSUE_RES_SHIFT (64 - BIO_ISSUE_RES_BITS) | |
174 | #define BIO_ISSUE_SIZE_SHIFT (BIO_ISSUE_RES_SHIFT - BIO_ISSUE_SIZE_BITS) | |
175 | #define BIO_ISSUE_TIME_MASK ((1ULL << BIO_ISSUE_SIZE_SHIFT) - 1) | |
176 | #define BIO_ISSUE_SIZE_MASK \ | |
177 | (((1ULL << BIO_ISSUE_SIZE_BITS) - 1) << BIO_ISSUE_SIZE_SHIFT) | |
178 | #define BIO_ISSUE_RES_MASK (~((1ULL << BIO_ISSUE_RES_SHIFT) - 1)) | |
179 | ||
180 | /* Reserved bit for blk-throtl */ | |
181 | #define BIO_ISSUE_THROTL_SKIP_LATENCY (1ULL << 63) | |
182 | ||
183 | struct bio_issue { | |
184 | u64 value; | |
185 | }; | |
186 | ||
187 | static inline u64 __bio_issue_time(u64 time) | |
188 | { | |
189 | return time & BIO_ISSUE_TIME_MASK; | |
190 | } | |
191 | ||
192 | static inline u64 bio_issue_time(struct bio_issue *issue) | |
193 | { | |
194 | return __bio_issue_time(issue->value); | |
195 | } | |
196 | ||
197 | static inline sector_t bio_issue_size(struct bio_issue *issue) | |
198 | { | |
199 | return ((issue->value & BIO_ISSUE_SIZE_MASK) >> BIO_ISSUE_SIZE_SHIFT); | |
200 | } | |
201 | ||
202 | static inline void bio_issue_init(struct bio_issue *issue, | |
203 | sector_t size) | |
204 | { | |
205 | size &= (1ULL << BIO_ISSUE_SIZE_BITS) - 1; | |
206 | issue->value = ((issue->value & BIO_ISSUE_RES_MASK) | | |
207 | (ktime_get_ns() & BIO_ISSUE_TIME_MASK) | | |
208 | ((u64)size << BIO_ISSUE_SIZE_SHIFT)); | |
209 | } | |
210 | ||
7cc01581 TH |
211 | /* |
212 | * main unit of I/O for the block layer and lower layers (ie drivers and | |
213 | * stacking drivers) | |
214 | */ | |
215 | struct bio { | |
7cc01581 | 216 | struct bio *bi_next; /* request queue link */ |
74d46992 | 217 | struct gendisk *bi_disk; |
1eff9d32 JA |
218 | unsigned int bi_opf; /* bottom bits req flags, |
219 | * top bits REQ_OP. Use | |
220 | * accessors. | |
4e1b2d52 | 221 | */ |
dbde775c | 222 | unsigned short bi_flags; /* status, etc and bvec pool number */ |
43b62ce3 | 223 | unsigned short bi_ioprio; |
cb6934f8 | 224 | unsigned short bi_write_hint; |
111be883 SL |
225 | blk_status_t bi_status; |
226 | u8 bi_partno; | |
993e4cde | 227 | atomic_t __bi_remaining; |
7cc01581 | 228 | |
111be883 | 229 | struct bvec_iter bi_iter; |
196d38bc | 230 | |
7cc01581 TH |
231 | bio_end_io_t *bi_end_io; |
232 | ||
233 | void *bi_private; | |
852c788f TH |
234 | #ifdef CONFIG_BLK_CGROUP |
235 | /* | |
db6638d7 DZ |
236 | * Represents the association of the css and request_queue for the bio. |
237 | * If a bio goes direct to device, it will not have a blkg as it will | |
238 | * not have a request_queue associated with it. The reference is put | |
239 | * on release of the bio. | |
852c788f | 240 | */ |
08e18eab | 241 | struct blkcg_gq *bi_blkg; |
5238dcf4 | 242 | struct bio_issue bi_issue; |
7caa4715 TH |
243 | #ifdef CONFIG_BLK_CGROUP_IOCOST |
244 | u64 bi_iocost_cost; | |
245 | #endif | |
852c788f | 246 | #endif |
a892c8d5 ST |
247 | |
248 | #ifdef CONFIG_BLK_INLINE_ENCRYPTION | |
249 | struct bio_crypt_ctx *bi_crypt_context; | |
250 | #endif | |
251 | ||
180b2f95 | 252 | union { |
7cc01581 | 253 | #if defined(CONFIG_BLK_DEV_INTEGRITY) |
180b2f95 | 254 | struct bio_integrity_payload *bi_integrity; /* data integrity */ |
7cc01581 | 255 | #endif |
180b2f95 | 256 | }; |
7cc01581 | 257 | |
4f024f37 KO |
258 | unsigned short bi_vcnt; /* how many bio_vec's */ |
259 | ||
f44b48c7 KO |
260 | /* |
261 | * Everything starting with bi_max_vecs will be preserved by bio_reset() | |
262 | */ | |
263 | ||
4f024f37 | 264 | unsigned short bi_max_vecs; /* max bvl_vecs we can hold */ |
f44b48c7 | 265 | |
dac56212 | 266 | atomic_t __bi_cnt; /* pin count */ |
f44b48c7 KO |
267 | |
268 | struct bio_vec *bi_io_vec; /* the actual vec list */ | |
269 | ||
395c72a7 KO |
270 | struct bio_set *bi_pool; |
271 | ||
7cc01581 TH |
272 | /* |
273 | * We can inline a number of vecs at the end of the bio, to avoid | |
274 | * double allocations for a small number of bio_vecs. This member | |
275 | * MUST obviously be kept at the very end of the bio. | |
276 | */ | |
5a58ec8c | 277 | struct bio_vec bi_inline_vecs[]; |
7cc01581 TH |
278 | }; |
279 | ||
f44b48c7 KO |
280 | #define BIO_RESET_BYTES offsetof(struct bio, bi_max_vecs) |
281 | ||
7cc01581 TH |
282 | /* |
283 | * bio flags | |
284 | */ | |
2b24e6f6 JT |
285 | enum { |
286 | BIO_NO_PAGE_REF, /* don't put release vec pages */ | |
2b24e6f6 JT |
287 | BIO_CLONED, /* doesn't own data */ |
288 | BIO_BOUNCED, /* bio is a bounce bio */ | |
b8e24a93 | 289 | BIO_WORKINGSET, /* contains userspace workingset pages */ |
2b24e6f6 JT |
290 | BIO_QUIET, /* Make BIO Quiet */ |
291 | BIO_CHAIN, /* chained bio, ->bi_remaining in effect */ | |
292 | BIO_REFFED, /* bio has elevated ->bi_cnt */ | |
293 | BIO_THROTTLED, /* This bio has already been subjected to | |
8d2bbd4c | 294 | * throttling rules. Don't do it again. */ |
2b24e6f6 | 295 | BIO_TRACE_COMPLETION, /* bio_endio() should trace the final completion |
fbbaf700 | 296 | * of this bio. */ |
0376e9ef | 297 | BIO_CGROUP_ACCT, /* has been accounted to a cgroup */ |
2b24e6f6 JT |
298 | BIO_TRACKED, /* set if bio goes through the rq_qos path */ |
299 | BIO_FLAG_LAST | |
300 | }; | |
cd4a4ae4 | 301 | |
dbde775c | 302 | /* See BVEC_POOL_OFFSET below before adding new flags */ |
f44b48c7 | 303 | |
7cc01581 | 304 | /* |
ed996a52 CH |
305 | * We support 6 different bvec pools, the last one is magic in that it |
306 | * is backed by a mempool. | |
7cc01581 | 307 | */ |
ed996a52 CH |
308 | #define BVEC_POOL_NR 6 |
309 | #define BVEC_POOL_MAX (BVEC_POOL_NR - 1) | |
310 | ||
311 | /* | |
dbde775c | 312 | * Top 3 bits of bio flags indicate the pool the bvecs came from. We add |
ed996a52 CH |
313 | * 1 to the actual index so that 0 indicates that there are no bvecs to be |
314 | * freed. | |
315 | */ | |
dbde775c | 316 | #define BVEC_POOL_BITS (3) |
c0acf12a | 317 | #define BVEC_POOL_OFFSET (16 - BVEC_POOL_BITS) |
ed996a52 | 318 | #define BVEC_POOL_IDX(bio) ((bio)->bi_flags >> BVEC_POOL_OFFSET) |
dbde775c N |
319 | #if (1<< BVEC_POOL_BITS) < (BVEC_POOL_NR+1) |
320 | # error "BVEC_POOL_BITS is too small" | |
321 | #endif | |
322 | ||
323 | /* | |
324 | * Flags starting here get preserved by bio_reset() - this includes | |
325 | * only BVEC_POOL_IDX() | |
326 | */ | |
327 | #define BIO_RESET_BITS BVEC_POOL_OFFSET | |
7cc01581 | 328 | |
9a95e4ef BVA |
329 | typedef __u32 __bitwise blk_mq_req_flags_t; |
330 | ||
7cc01581 | 331 | /* |
ef295ecf CH |
332 | * Operations and flags common to the bio and request structures. |
333 | * We use 8 bits for encoding the operation, and the remaining 24 for flags. | |
87374179 CH |
334 | * |
335 | * The least significant bit of the operation number indicates the data | |
336 | * transfer direction: | |
337 | * | |
338 | * - if the least significant bit is set transfers are TO the device | |
339 | * - if the least significant bit is not set transfers are FROM the device | |
340 | * | |
341 | * If a operation does not transfer data the least significant bit has no | |
342 | * meaning. | |
7cc01581 | 343 | */ |
ef295ecf CH |
344 | #define REQ_OP_BITS 8 |
345 | #define REQ_OP_MASK ((1 << REQ_OP_BITS) - 1) | |
346 | #define REQ_FLAG_BITS 24 | |
347 | ||
348 | enum req_opf { | |
87374179 CH |
349 | /* read sectors from the device */ |
350 | REQ_OP_READ = 0, | |
351 | /* write sectors to the device */ | |
352 | REQ_OP_WRITE = 1, | |
353 | /* flush the volatile write cache */ | |
354 | REQ_OP_FLUSH = 2, | |
355 | /* discard sectors */ | |
356 | REQ_OP_DISCARD = 3, | |
87374179 CH |
357 | /* securely erase sectors */ |
358 | REQ_OP_SECURE_ERASE = 5, | |
87374179 CH |
359 | /* write the same sector many times */ |
360 | REQ_OP_WRITE_SAME = 7, | |
a6f0788e | 361 | /* write the zero filled sector many times */ |
1d62ac13 | 362 | REQ_OP_WRITE_ZEROES = 9, |
6c1b1da5 AJ |
363 | /* Open a zone */ |
364 | REQ_OP_ZONE_OPEN = 10, | |
365 | /* Close a zone */ | |
366 | REQ_OP_ZONE_CLOSE = 11, | |
367 | /* Transition a zone to full */ | |
368 | REQ_OP_ZONE_FINISH = 12, | |
0512a75b KB |
369 | /* write data at the current zone write pointer */ |
370 | REQ_OP_ZONE_APPEND = 13, | |
ecdef9f4 CL |
371 | /* reset a zone write pointer */ |
372 | REQ_OP_ZONE_RESET = 15, | |
373 | /* reset all the zone present on the device */ | |
374 | REQ_OP_ZONE_RESET_ALL = 17, | |
ef295ecf | 375 | |
aebf526b CH |
376 | /* SCSI passthrough using struct scsi_request */ |
377 | REQ_OP_SCSI_IN = 32, | |
378 | REQ_OP_SCSI_OUT = 33, | |
379 | /* Driver private requests */ | |
380 | REQ_OP_DRV_IN = 34, | |
381 | REQ_OP_DRV_OUT = 35, | |
382 | ||
ef295ecf CH |
383 | REQ_OP_LAST, |
384 | }; | |
385 | ||
386 | enum req_flag_bits { | |
387 | __REQ_FAILFAST_DEV = /* no driver retries of device errors */ | |
388 | REQ_OP_BITS, | |
7cc01581 TH |
389 | __REQ_FAILFAST_TRANSPORT, /* no driver retries of transport errors */ |
390 | __REQ_FAILFAST_DRIVER, /* no driver retries of driver errors */ | |
7cc01581 TH |
391 | __REQ_SYNC, /* request is sync (sync write or read) */ |
392 | __REQ_META, /* metadata io request */ | |
65299a3b | 393 | __REQ_PRIO, /* boost priority in cfq */ |
bd1c1c21 | 394 | __REQ_NOMERGE, /* don't touch this for merging */ |
a2b80967 | 395 | __REQ_IDLE, /* anticipate more IO after this one */ |
180b2f95 | 396 | __REQ_INTEGRITY, /* I/O includes block integrity payload */ |
8e4bf844 | 397 | __REQ_FUA, /* forced unit access */ |
28a8f0d3 | 398 | __REQ_PREFLUSH, /* request for cache flush */ |
188bd2b1 | 399 | __REQ_RAHEAD, /* read ahead, can fail anytime */ |
1d796d6a | 400 | __REQ_BACKGROUND, /* background IO */ |
8977f563 | 401 | __REQ_NOWAIT, /* Don't wait if request will block */ |
d3f77dfd TH |
402 | /* |
403 | * When a shared kthread needs to issue a bio for a cgroup, doing | |
404 | * so synchronously can lead to priority inversions as the kthread | |
405 | * can be trapped waiting for that cgroup. CGROUP_PUNT flag makes | |
406 | * submit_bio() punt the actual issuing to a dedicated per-blkcg | |
407 | * work item to avoid such priority inversions. | |
408 | */ | |
409 | __REQ_CGROUP_PUNT, | |
d928be9f CH |
410 | |
411 | /* command specific flags for REQ_OP_WRITE_ZEROES: */ | |
412 | __REQ_NOUNMAP, /* do not free blocks when zeroing */ | |
413 | ||
d1e36282 JA |
414 | __REQ_HIPRI, |
415 | ||
96222bcc CH |
416 | /* for driver use */ |
417 | __REQ_DRV, | |
0d1e0c7c | 418 | __REQ_SWAP, /* swapping request. */ |
7cc01581 TH |
419 | __REQ_NR_BITS, /* stops here */ |
420 | }; | |
421 | ||
5953316d JA |
422 | #define REQ_FAILFAST_DEV (1ULL << __REQ_FAILFAST_DEV) |
423 | #define REQ_FAILFAST_TRANSPORT (1ULL << __REQ_FAILFAST_TRANSPORT) | |
424 | #define REQ_FAILFAST_DRIVER (1ULL << __REQ_FAILFAST_DRIVER) | |
425 | #define REQ_SYNC (1ULL << __REQ_SYNC) | |
426 | #define REQ_META (1ULL << __REQ_META) | |
427 | #define REQ_PRIO (1ULL << __REQ_PRIO) | |
ef295ecf | 428 | #define REQ_NOMERGE (1ULL << __REQ_NOMERGE) |
a2b80967 | 429 | #define REQ_IDLE (1ULL << __REQ_IDLE) |
180b2f95 | 430 | #define REQ_INTEGRITY (1ULL << __REQ_INTEGRITY) |
ef295ecf CH |
431 | #define REQ_FUA (1ULL << __REQ_FUA) |
432 | #define REQ_PREFLUSH (1ULL << __REQ_PREFLUSH) | |
433 | #define REQ_RAHEAD (1ULL << __REQ_RAHEAD) | |
1d796d6a | 434 | #define REQ_BACKGROUND (1ULL << __REQ_BACKGROUND) |
8977f563 | 435 | #define REQ_NOWAIT (1ULL << __REQ_NOWAIT) |
d3f77dfd TH |
436 | #define REQ_CGROUP_PUNT (1ULL << __REQ_CGROUP_PUNT) |
437 | ||
d928be9f | 438 | #define REQ_NOUNMAP (1ULL << __REQ_NOUNMAP) |
d1e36282 | 439 | #define REQ_HIPRI (1ULL << __REQ_HIPRI) |
d928be9f | 440 | |
96222bcc | 441 | #define REQ_DRV (1ULL << __REQ_DRV) |
0d1e0c7c | 442 | #define REQ_SWAP (1ULL << __REQ_SWAP) |
d928be9f | 443 | |
7cc01581 TH |
444 | #define REQ_FAILFAST_MASK \ |
445 | (REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER) | |
7cc01581 | 446 | |
e2a60da7 | 447 | #define REQ_NOMERGE_FLAGS \ |
e8064021 | 448 | (REQ_NOMERGE | REQ_PREFLUSH | REQ_FUA) |
e2a60da7 | 449 | |
dbae2c55 MC |
450 | enum stat_group { |
451 | STAT_READ, | |
452 | STAT_WRITE, | |
bdca3c87 | 453 | STAT_DISCARD, |
b6866318 | 454 | STAT_FLUSH, |
dbae2c55 MC |
455 | |
456 | NR_STAT_GROUPS | |
457 | }; | |
458 | ||
ef295ecf CH |
459 | #define bio_op(bio) \ |
460 | ((bio)->bi_opf & REQ_OP_MASK) | |
461 | #define req_op(req) \ | |
462 | ((req)->cmd_flags & REQ_OP_MASK) | |
7cc01581 | 463 | |
ef295ecf | 464 | /* obsolete, don't use in new code */ |
93c5bdf7 CH |
465 | static inline void bio_set_op_attrs(struct bio *bio, unsigned op, |
466 | unsigned op_flags) | |
467 | { | |
468 | bio->bi_opf = op | op_flags; | |
469 | } | |
c11f0c0b | 470 | |
87374179 CH |
471 | static inline bool op_is_write(unsigned int op) |
472 | { | |
473 | return (op & 1); | |
474 | } | |
475 | ||
f73f44eb CH |
476 | /* |
477 | * Check if the bio or request is one that needs special treatment in the | |
478 | * flush state machine. | |
479 | */ | |
480 | static inline bool op_is_flush(unsigned int op) | |
481 | { | |
482 | return op & (REQ_FUA | REQ_PREFLUSH); | |
483 | } | |
484 | ||
b685d3d6 CH |
485 | /* |
486 | * Reads are always treated as synchronous, as are requests with the FUA or | |
487 | * PREFLUSH flag. Other operations may be marked as synchronous using the | |
488 | * REQ_SYNC flag. | |
489 | */ | |
ef295ecf CH |
490 | static inline bool op_is_sync(unsigned int op) |
491 | { | |
b685d3d6 CH |
492 | return (op & REQ_OP_MASK) == REQ_OP_READ || |
493 | (op & (REQ_SYNC | REQ_FUA | REQ_PREFLUSH)); | |
ef295ecf | 494 | } |
c11f0c0b | 495 | |
bdca3c87 MC |
496 | static inline bool op_is_discard(unsigned int op) |
497 | { | |
498 | return (op & REQ_OP_MASK) == REQ_OP_DISCARD; | |
499 | } | |
500 | ||
6c1b1da5 AJ |
501 | /* |
502 | * Check if a bio or request operation is a zone management operation, with | |
503 | * the exception of REQ_OP_ZONE_RESET_ALL which is treated as a special case | |
504 | * due to its different handling in the block layer and device response in | |
505 | * case of command failure. | |
506 | */ | |
507 | static inline bool op_is_zone_mgmt(enum req_opf op) | |
508 | { | |
509 | switch (op & REQ_OP_MASK) { | |
510 | case REQ_OP_ZONE_RESET: | |
511 | case REQ_OP_ZONE_OPEN: | |
512 | case REQ_OP_ZONE_CLOSE: | |
513 | case REQ_OP_ZONE_FINISH: | |
514 | return true; | |
515 | default: | |
516 | return false; | |
517 | } | |
518 | } | |
519 | ||
ddcf35d3 MC |
520 | static inline int op_stat_group(unsigned int op) |
521 | { | |
bdca3c87 MC |
522 | if (op_is_discard(op)) |
523 | return STAT_DISCARD; | |
ddcf35d3 MC |
524 | return op_is_write(op); |
525 | } | |
526 | ||
dece1635 | 527 | typedef unsigned int blk_qc_t; |
fd2d3326 JA |
528 | #define BLK_QC_T_NONE -1U |
529 | #define BLK_QC_T_SHIFT 16 | |
530 | #define BLK_QC_T_INTERNAL (1U << 31) | |
dece1635 JA |
531 | |
532 | static inline bool blk_qc_t_valid(blk_qc_t cookie) | |
533 | { | |
3aab9177 | 534 | return cookie != BLK_QC_T_NONE; |
dece1635 JA |
535 | } |
536 | ||
dece1635 JA |
537 | static inline unsigned int blk_qc_t_to_queue_num(blk_qc_t cookie) |
538 | { | |
fd2d3326 | 539 | return (cookie & ~BLK_QC_T_INTERNAL) >> BLK_QC_T_SHIFT; |
dece1635 JA |
540 | } |
541 | ||
542 | static inline unsigned int blk_qc_t_to_tag(blk_qc_t cookie) | |
543 | { | |
e3a7a3bf | 544 | return cookie & ((1u << BLK_QC_T_SHIFT) - 1); |
dece1635 JA |
545 | } |
546 | ||
fd2d3326 JA |
547 | static inline bool blk_qc_t_is_internal(blk_qc_t cookie) |
548 | { | |
549 | return (cookie & BLK_QC_T_INTERNAL) != 0; | |
550 | } | |
551 | ||
cf43e6be | 552 | struct blk_rq_stat { |
eca8b53a | 553 | u64 mean; |
cf43e6be JA |
554 | u64 min; |
555 | u64 max; | |
eca8b53a | 556 | u32 nr_samples; |
cf43e6be | 557 | u64 batch; |
cf43e6be JA |
558 | }; |
559 | ||
7cc01581 | 560 | #endif /* __LINUX_BLK_TYPES_H */ |