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> |
44981351 | 13 | #include <linux/rw_hint.h> |
7cc01581 TH |
14 | |
15 | struct bio_set; | |
16 | struct bio; | |
17 | struct bio_integrity_payload; | |
18 | struct page; | |
852c788f TH |
19 | struct io_context; |
20 | struct cgroup_subsys_state; | |
4246a0b6 | 21 | typedef void (bio_end_io_t) (struct bio *); |
a892c8d5 | 22 | struct bio_crypt_ctx; |
7cc01581 | 23 | |
99457db8 CH |
24 | /* |
25 | * The basic unit of block I/O is a sector. It is used in a number of contexts | |
26 | * in Linux (blk, bio, genhd). The size of one sector is 512 = 2**9 | |
27 | * bytes. Variables of type sector_t represent an offset or size that is a | |
28 | * multiple of 512 bytes. Hence these two constants. | |
29 | */ | |
30 | #ifndef SECTOR_SHIFT | |
31 | #define SECTOR_SHIFT 9 | |
32 | #endif | |
33 | #ifndef SECTOR_SIZE | |
34 | #define SECTOR_SIZE (1 << SECTOR_SHIFT) | |
35 | #endif | |
36 | ||
37 | #define PAGE_SECTORS_SHIFT (PAGE_SHIFT - SECTOR_SHIFT) | |
38 | #define PAGE_SECTORS (1 << PAGE_SECTORS_SHIFT) | |
39 | #define SECTOR_MASK (PAGE_SECTORS - 1) | |
40 | ||
621c1f42 | 41 | struct block_device { |
29ff57c6 | 42 | sector_t bd_start_sect; |
f09313c5 | 43 | sector_t bd_nr_sectors; |
3838c406 JA |
44 | struct gendisk * bd_disk; |
45 | struct request_queue * bd_queue; | |
15e3d2c5 CH |
46 | struct disk_stats __percpu *bd_stats; |
47 | unsigned long bd_stamp; | |
1116b9fa AV |
48 | atomic_t __bd_flags; // partition number + flags |
49 | #define BD_PARTNO 255 // lower 8 bits; assign-once | |
01e198f0 | 50 | #define BD_READ_ONLY (1u<<8) // read-only policy |
4c80105e | 51 | #define BD_WRITE_HOLDER (1u<<9) |
ac2b6f9d | 52 | #define BD_HAS_SUBMIT_BIO (1u<<10) |
49a43dae | 53 | #define BD_RO_WARNED (1u<<11) |
811ba89a AV |
54 | #ifdef CONFIG_FAIL_MAKE_REQUEST |
55 | #define BD_MAKE_IT_FAIL (1u<<12) | |
56 | #endif | |
46d40cfa | 57 | dev_t bd_dev; |
e33aef2c | 58 | struct address_space *bd_mapping; /* page cache */ |
fad907cf | 59 | |
9acf381f | 60 | atomic_t bd_openers; |
3838c406 | 61 | spinlock_t bd_size_lock; /* for bd_inode->i_size updates */ |
621c1f42 CH |
62 | void * bd_claiming; |
63 | void * bd_holder; | |
0718afd4 CH |
64 | const struct blk_holder_ops *bd_holder_ops; |
65 | struct mutex bd_holder_lock; | |
621c1f42 | 66 | int bd_holders; |
1bdd5ae0 | 67 | struct kobject *bd_holder_dir; |
621c1f42 | 68 | |
90f95dc4 CB |
69 | atomic_t bd_fsfreeze_count; /* number of freeze requests */ |
70 | struct mutex bd_fsfreeze_mutex; /* serialize freeze/thaw */ | |
231926db CH |
71 | |
72 | struct partition_meta_info *bd_meta_info; | |
ed5cc702 | 73 | int bd_writers; |
3838c406 JA |
74 | /* |
75 | * keep this out-of-line as it's both big and not needed in the fast | |
76 | * path | |
77 | */ | |
78 | struct device bd_device; | |
621c1f42 CH |
79 | } __randomize_layout; |
80 | ||
a954ea81 | 81 | #define bdev_whole(_bdev) \ |
cb8432d6 | 82 | ((_bdev)->bd_disk->part0) |
a954ea81 | 83 | |
0d02129e CH |
84 | #define dev_to_bdev(device) \ |
85 | container_of((device), struct block_device, bd_device) | |
86 | ||
8d65269f | 87 | #define bdev_kobj(_bdev) \ |
0d02129e | 88 | (&((_bdev)->bd_device.kobj)) |
8d65269f | 89 | |
2a842aca CH |
90 | /* |
91 | * Block error status values. See block/blk-core:blk_errors for the details. | |
92 | */ | |
93 | typedef u8 __bitwise blk_status_t; | |
aad5b23e | 94 | typedef u16 blk_short_t; |
2a842aca CH |
95 | #define BLK_STS_OK 0 |
96 | #define BLK_STS_NOTSUPP ((__force blk_status_t)1) | |
97 | #define BLK_STS_TIMEOUT ((__force blk_status_t)2) | |
98 | #define BLK_STS_NOSPC ((__force blk_status_t)3) | |
99 | #define BLK_STS_TRANSPORT ((__force blk_status_t)4) | |
100 | #define BLK_STS_TARGET ((__force blk_status_t)5) | |
7ba15083 | 101 | #define BLK_STS_RESV_CONFLICT ((__force blk_status_t)6) |
2a842aca CH |
102 | #define BLK_STS_MEDIUM ((__force blk_status_t)7) |
103 | #define BLK_STS_PROTECTION ((__force blk_status_t)8) | |
104 | #define BLK_STS_RESOURCE ((__force blk_status_t)9) | |
105 | #define BLK_STS_IOERR ((__force blk_status_t)10) | |
106 | ||
4e4cbee9 CH |
107 | /* hack for device mapper, don't use elsewhere: */ |
108 | #define BLK_STS_DM_REQUEUE ((__force blk_status_t)11) | |
109 | ||
98d40e76 HR |
110 | /* |
111 | * BLK_STS_AGAIN should only be returned if RQF_NOWAIT is set | |
112 | * and the bio would block (cf bio_wouldblock_error()) | |
113 | */ | |
03a07c92 GR |
114 | #define BLK_STS_AGAIN ((__force blk_status_t)12) |
115 | ||
86ff7c2a ML |
116 | /* |
117 | * BLK_STS_DEV_RESOURCE is returned from the driver to the block layer if | |
118 | * device related resources are unavailable, but the driver can guarantee | |
119 | * that the queue will be rerun in the future once resources become | |
120 | * available again. This is typically the case for device specific | |
121 | * resources that are consumed for IO. If the driver fails allocating these | |
122 | * resources, we know that inflight (or pending) IO will free these | |
123 | * resource upon completion. | |
124 | * | |
125 | * This is different from BLK_STS_RESOURCE in that it explicitly references | |
126 | * a device specific resource. For resources of wider scope, allocation | |
127 | * failure can happen without having pending IO. This means that we can't | |
128 | * rely on request completions freeing these resources, as IO may not be in | |
129 | * flight. Examples of that are kernel memory allocations, DMA mappings, or | |
130 | * any other system wide resources. | |
131 | */ | |
132 | #define BLK_STS_DEV_RESOURCE ((__force blk_status_t)13) | |
133 | ||
3b481d91 KB |
134 | /* |
135 | * BLK_STS_ZONE_OPEN_RESOURCE is returned from the driver in the completion | |
136 | * path if the device returns a status indicating that too many zone resources | |
137 | * are currently open. The same command should be successful if resubmitted | |
138 | * after the number of open zones decreases below the device's limits, which is | |
139 | * reported in the request_queue's max_open_zones. | |
140 | */ | |
63b5385e | 141 | #define BLK_STS_ZONE_OPEN_RESOURCE ((__force blk_status_t)14) |
3b481d91 KB |
142 | |
143 | /* | |
144 | * BLK_STS_ZONE_ACTIVE_RESOURCE is returned from the driver in the completion | |
145 | * path if the device returns a status indicating that too many zone resources | |
146 | * are currently active. The same command should be successful if resubmitted | |
147 | * after the number of active zones decreases below the device's limits, which | |
148 | * is reported in the request_queue's max_active_zones. | |
149 | */ | |
63b5385e | 150 | #define BLK_STS_ZONE_ACTIVE_RESOURCE ((__force blk_status_t)15) |
3b481d91 | 151 | |
2651bf68 SL |
152 | /* |
153 | * BLK_STS_OFFLINE is returned from the driver when the target device is offline | |
154 | * or is being taken offline. This could help differentiate the case where a | |
155 | * device is intentionally being shut down from a real I/O error. | |
156 | */ | |
63b5385e | 157 | #define BLK_STS_OFFLINE ((__force blk_status_t)16) |
2651bf68 | 158 | |
dffc480d DLM |
159 | /* |
160 | * BLK_STS_DURATION_LIMIT is returned from the driver when the target device | |
161 | * aborted the command because it exceeded one of its Command Duration Limits. | |
162 | */ | |
63b5385e | 163 | #define BLK_STS_DURATION_LIMIT ((__force blk_status_t)17) |
dffc480d | 164 | |
9111e568 KB |
165 | /** |
166 | * blk_path_error - returns true if error may be path related | |
167 | * @error: status the request was completed with | |
168 | * | |
169 | * Description: | |
170 | * This classifies block error status into non-retryable errors and ones | |
171 | * that may be successful if retried on a failover path. | |
172 | * | |
173 | * Return: | |
174 | * %false - retrying failover path will not help | |
175 | * %true - may succeed if retried | |
176 | */ | |
177 | static inline bool blk_path_error(blk_status_t error) | |
178 | { | |
179 | switch (error) { | |
180 | case BLK_STS_NOTSUPP: | |
181 | case BLK_STS_NOSPC: | |
182 | case BLK_STS_TARGET: | |
7ba15083 | 183 | case BLK_STS_RESV_CONFLICT: |
9111e568 KB |
184 | case BLK_STS_MEDIUM: |
185 | case BLK_STS_PROTECTION: | |
186 | return false; | |
187 | } | |
188 | ||
189 | /* Anything else could be a path failure, so should be retried */ | |
190 | return true; | |
191 | } | |
192 | ||
5238dcf4 OS |
193 | struct bio_issue { |
194 | u64 value; | |
195 | }; | |
196 | ||
342a72a3 BVA |
197 | typedef __u32 __bitwise blk_opf_t; |
198 | ||
3e08773c CH |
199 | typedef unsigned int blk_qc_t; |
200 | #define BLK_QC_T_NONE -1U | |
201 | ||
7cc01581 TH |
202 | /* |
203 | * main unit of I/O for the block layer and lower layers (ie drivers and | |
204 | * stacking drivers) | |
205 | */ | |
206 | struct bio { | |
7cc01581 | 207 | struct bio *bi_next; /* request queue link */ |
309dca30 | 208 | struct block_device *bi_bdev; |
342a72a3 | 209 | blk_opf_t bi_opf; /* bottom bits REQ_OP, top bits |
5d2ae142 | 210 | * req_flags. |
4e1b2d52 | 211 | */ |
7a800a20 | 212 | unsigned short bi_flags; /* BIO_* below */ |
43b62ce3 | 213 | unsigned short bi_ioprio; |
44981351 | 214 | enum rw_hint bi_write_hint; |
111be883 | 215 | blk_status_t bi_status; |
993e4cde | 216 | atomic_t __bi_remaining; |
7cc01581 | 217 | |
111be883 | 218 | struct bvec_iter bi_iter; |
196d38bc | 219 | |
dd291d77 DLM |
220 | union { |
221 | /* for polled bios: */ | |
222 | blk_qc_t bi_cookie; | |
223 | /* for plugged zoned writes only: */ | |
224 | unsigned int __bi_nr_segments; | |
225 | }; | |
7cc01581 | 226 | bio_end_io_t *bi_end_io; |
7cc01581 | 227 | void *bi_private; |
852c788f TH |
228 | #ifdef CONFIG_BLK_CGROUP |
229 | /* | |
db6638d7 DZ |
230 | * Represents the association of the css and request_queue for the bio. |
231 | * If a bio goes direct to device, it will not have a blkg as it will | |
232 | * not have a request_queue associated with it. The reference is put | |
233 | * on release of the bio. | |
852c788f | 234 | */ |
08e18eab | 235 | struct blkcg_gq *bi_blkg; |
5238dcf4 | 236 | struct bio_issue bi_issue; |
7caa4715 TH |
237 | #ifdef CONFIG_BLK_CGROUP_IOCOST |
238 | u64 bi_iocost_cost; | |
239 | #endif | |
852c788f | 240 | #endif |
a892c8d5 ST |
241 | |
242 | #ifdef CONFIG_BLK_INLINE_ENCRYPTION | |
243 | struct bio_crypt_ctx *bi_crypt_context; | |
244 | #endif | |
245 | ||
180b2f95 | 246 | union { |
7cc01581 | 247 | #if defined(CONFIG_BLK_DEV_INTEGRITY) |
180b2f95 | 248 | struct bio_integrity_payload *bi_integrity; /* data integrity */ |
7cc01581 | 249 | #endif |
180b2f95 | 250 | }; |
7cc01581 | 251 | |
4f024f37 KO |
252 | unsigned short bi_vcnt; /* how many bio_vec's */ |
253 | ||
f44b48c7 KO |
254 | /* |
255 | * Everything starting with bi_max_vecs will be preserved by bio_reset() | |
256 | */ | |
257 | ||
4f024f37 | 258 | unsigned short bi_max_vecs; /* max bvl_vecs we can hold */ |
f44b48c7 | 259 | |
dac56212 | 260 | atomic_t __bi_cnt; /* pin count */ |
f44b48c7 KO |
261 | |
262 | struct bio_vec *bi_io_vec; /* the actual vec list */ | |
263 | ||
395c72a7 KO |
264 | struct bio_set *bi_pool; |
265 | ||
7cc01581 TH |
266 | /* |
267 | * We can inline a number of vecs at the end of the bio, to avoid | |
268 | * double allocations for a small number of bio_vecs. This member | |
269 | * MUST obviously be kept at the very end of the bio. | |
270 | */ | |
5a58ec8c | 271 | struct bio_vec bi_inline_vecs[]; |
7cc01581 TH |
272 | }; |
273 | ||
f44b48c7 | 274 | #define BIO_RESET_BYTES offsetof(struct bio, bi_max_vecs) |
e83502ca | 275 | #define BIO_MAX_SECTORS (UINT_MAX >> SECTOR_SHIFT) |
f44b48c7 | 276 | |
7cc01581 TH |
277 | /* |
278 | * bio flags | |
279 | */ | |
2b24e6f6 | 280 | enum { |
fd363244 | 281 | BIO_PAGE_PINNED, /* Unpin pages in bio_release_pages() */ |
2b24e6f6 JT |
282 | BIO_CLONED, /* doesn't own data */ |
283 | BIO_BOUNCED, /* bio is a bounce bio */ | |
2b24e6f6 JT |
284 | BIO_QUIET, /* Make BIO Quiet */ |
285 | BIO_CHAIN, /* chained bio, ->bi_remaining in effect */ | |
286 | BIO_REFFED, /* bio has elevated ->bi_cnt */ | |
320fb0f9 | 287 | BIO_BPS_THROTTLED, /* This bio has already been subjected to |
8d2bbd4c | 288 | * throttling rules. Don't do it again. */ |
2b24e6f6 | 289 | BIO_TRACE_COMPLETION, /* bio_endio() should trace the final completion |
fbbaf700 | 290 | * of this bio. */ |
0376e9ef | 291 | BIO_CGROUP_ACCT, /* has been accounted to a cgroup */ |
aa1b46dc TH |
292 | BIO_QOS_THROTTLED, /* bio went through rq_qos throttle path */ |
293 | BIO_QOS_MERGED, /* but went through rq_qos merge path */ | |
30c5d345 | 294 | BIO_REMAPPED, |
dd291d77 | 295 | BIO_ZONE_WRITE_PLUGGING, /* bio handled through zone write plugging */ |
9b1ce7f0 | 296 | BIO_EMULATES_ZONE_APPEND, /* bio emulates a zone append operation */ |
2b24e6f6 JT |
297 | BIO_FLAG_LAST |
298 | }; | |
cd4a4ae4 | 299 | |
9a95e4ef BVA |
300 | typedef __u32 __bitwise blk_mq_req_flags_t; |
301 | ||
ff07a02e | 302 | #define REQ_OP_BITS 8 |
342a72a3 | 303 | #define REQ_OP_MASK (__force blk_opf_t)((1 << REQ_OP_BITS) - 1) |
ff07a02e BVA |
304 | #define REQ_FLAG_BITS 24 |
305 | ||
306 | /** | |
307 | * enum req_op - Operations common to the bio and request structures. | |
ef295ecf | 308 | * We use 8 bits for encoding the operation, and the remaining 24 for flags. |
87374179 CH |
309 | * |
310 | * The least significant bit of the operation number indicates the data | |
311 | * transfer direction: | |
312 | * | |
313 | * - if the least significant bit is set transfers are TO the device | |
314 | * - if the least significant bit is not set transfers are FROM the device | |
315 | * | |
316 | * If a operation does not transfer data the least significant bit has no | |
317 | * meaning. | |
7cc01581 | 318 | */ |
ff07a02e | 319 | enum req_op { |
87374179 | 320 | /* read sectors from the device */ |
342a72a3 | 321 | REQ_OP_READ = (__force blk_opf_t)0, |
87374179 | 322 | /* write sectors to the device */ |
342a72a3 | 323 | REQ_OP_WRITE = (__force blk_opf_t)1, |
87374179 | 324 | /* flush the volatile write cache */ |
342a72a3 | 325 | REQ_OP_FLUSH = (__force blk_opf_t)2, |
87374179 | 326 | /* discard sectors */ |
342a72a3 | 327 | REQ_OP_DISCARD = (__force blk_opf_t)3, |
87374179 | 328 | /* securely erase sectors */ |
342a72a3 | 329 | REQ_OP_SECURE_ERASE = (__force blk_opf_t)5, |
1c042f8d CH |
330 | /* write data at the current zone write pointer */ |
331 | REQ_OP_ZONE_APPEND = (__force blk_opf_t)7, | |
a6f0788e | 332 | /* write the zero filled sector many times */ |
342a72a3 | 333 | REQ_OP_WRITE_ZEROES = (__force blk_opf_t)9, |
6c1b1da5 | 334 | /* Open a zone */ |
342a72a3 | 335 | REQ_OP_ZONE_OPEN = (__force blk_opf_t)10, |
6c1b1da5 | 336 | /* Close a zone */ |
342a72a3 | 337 | REQ_OP_ZONE_CLOSE = (__force blk_opf_t)11, |
6c1b1da5 | 338 | /* Transition a zone to full */ |
342a72a3 | 339 | REQ_OP_ZONE_FINISH = (__force blk_opf_t)12, |
ecdef9f4 | 340 | /* reset a zone write pointer */ |
1c042f8d | 341 | REQ_OP_ZONE_RESET = (__force blk_opf_t)13, |
ecdef9f4 | 342 | /* reset all the zone present on the device */ |
1c042f8d | 343 | REQ_OP_ZONE_RESET_ALL = (__force blk_opf_t)15, |
ef295ecf | 344 | |
aebf526b | 345 | /* Driver private requests */ |
342a72a3 BVA |
346 | REQ_OP_DRV_IN = (__force blk_opf_t)34, |
347 | REQ_OP_DRV_OUT = (__force blk_opf_t)35, | |
aebf526b | 348 | |
342a72a3 | 349 | REQ_OP_LAST = (__force blk_opf_t)36, |
ef295ecf CH |
350 | }; |
351 | ||
352 | enum req_flag_bits { | |
353 | __REQ_FAILFAST_DEV = /* no driver retries of device errors */ | |
354 | REQ_OP_BITS, | |
7cc01581 TH |
355 | __REQ_FAILFAST_TRANSPORT, /* no driver retries of transport errors */ |
356 | __REQ_FAILFAST_DRIVER, /* no driver retries of driver errors */ | |
7cc01581 TH |
357 | __REQ_SYNC, /* request is sync (sync write or read) */ |
358 | __REQ_META, /* metadata io request */ | |
65299a3b | 359 | __REQ_PRIO, /* boost priority in cfq */ |
bd1c1c21 | 360 | __REQ_NOMERGE, /* don't touch this for merging */ |
a2b80967 | 361 | __REQ_IDLE, /* anticipate more IO after this one */ |
180b2f95 | 362 | __REQ_INTEGRITY, /* I/O includes block integrity payload */ |
8e4bf844 | 363 | __REQ_FUA, /* forced unit access */ |
28a8f0d3 | 364 | __REQ_PREFLUSH, /* request for cache flush */ |
188bd2b1 | 365 | __REQ_RAHEAD, /* read ahead, can fail anytime */ |
1d796d6a | 366 | __REQ_BACKGROUND, /* background IO */ |
8977f563 | 367 | __REQ_NOWAIT, /* Don't wait if request will block */ |
3e08773c | 368 | __REQ_POLLED, /* caller polls for completion using bio_poll */ |
0df71650 | 369 | __REQ_ALLOC_CACHE, /* allocate IO from cache if available */ |
5ce7729f CH |
370 | __REQ_SWAP, /* swap I/O */ |
371 | __REQ_DRV, /* for driver use */ | |
3480373e | 372 | __REQ_FS_PRIVATE, /* for file system (submitter) use */ |
5ce7729f CH |
373 | |
374 | /* | |
375 | * Command specific flags, keep last: | |
376 | */ | |
377 | /* for REQ_OP_WRITE_ZEROES: */ | |
378 | __REQ_NOUNMAP, /* do not free blocks when zeroing */ | |
d1e36282 | 379 | |
7cc01581 TH |
380 | __REQ_NR_BITS, /* stops here */ |
381 | }; | |
382 | ||
342a72a3 BVA |
383 | #define REQ_FAILFAST_DEV \ |
384 | (__force blk_opf_t)(1ULL << __REQ_FAILFAST_DEV) | |
385 | #define REQ_FAILFAST_TRANSPORT \ | |
386 | (__force blk_opf_t)(1ULL << __REQ_FAILFAST_TRANSPORT) | |
387 | #define REQ_FAILFAST_DRIVER \ | |
388 | (__force blk_opf_t)(1ULL << __REQ_FAILFAST_DRIVER) | |
389 | #define REQ_SYNC (__force blk_opf_t)(1ULL << __REQ_SYNC) | |
390 | #define REQ_META (__force blk_opf_t)(1ULL << __REQ_META) | |
391 | #define REQ_PRIO (__force blk_opf_t)(1ULL << __REQ_PRIO) | |
392 | #define REQ_NOMERGE (__force blk_opf_t)(1ULL << __REQ_NOMERGE) | |
393 | #define REQ_IDLE (__force blk_opf_t)(1ULL << __REQ_IDLE) | |
394 | #define REQ_INTEGRITY (__force blk_opf_t)(1ULL << __REQ_INTEGRITY) | |
395 | #define REQ_FUA (__force blk_opf_t)(1ULL << __REQ_FUA) | |
396 | #define REQ_PREFLUSH (__force blk_opf_t)(1ULL << __REQ_PREFLUSH) | |
397 | #define REQ_RAHEAD (__force blk_opf_t)(1ULL << __REQ_RAHEAD) | |
398 | #define REQ_BACKGROUND (__force blk_opf_t)(1ULL << __REQ_BACKGROUND) | |
399 | #define REQ_NOWAIT (__force blk_opf_t)(1ULL << __REQ_NOWAIT) | |
342a72a3 BVA |
400 | #define REQ_POLLED (__force blk_opf_t)(1ULL << __REQ_POLLED) |
401 | #define REQ_ALLOC_CACHE (__force blk_opf_t)(1ULL << __REQ_ALLOC_CACHE) | |
342a72a3 | 402 | #define REQ_SWAP (__force blk_opf_t)(1ULL << __REQ_SWAP) |
3480373e CH |
403 | #define REQ_DRV (__force blk_opf_t)(1ULL << __REQ_DRV) |
404 | #define REQ_FS_PRIVATE (__force blk_opf_t)(1ULL << __REQ_FS_PRIVATE) | |
405 | ||
406 | #define REQ_NOUNMAP (__force blk_opf_t)(1ULL << __REQ_NOUNMAP) | |
d928be9f | 407 | |
7cc01581 TH |
408 | #define REQ_FAILFAST_MASK \ |
409 | (REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER) | |
7cc01581 | 410 | |
e2a60da7 | 411 | #define REQ_NOMERGE_FLAGS \ |
e8064021 | 412 | (REQ_NOMERGE | REQ_PREFLUSH | REQ_FUA) |
e2a60da7 | 413 | |
dbae2c55 MC |
414 | enum stat_group { |
415 | STAT_READ, | |
416 | STAT_WRITE, | |
bdca3c87 | 417 | STAT_DISCARD, |
b6866318 | 418 | STAT_FLUSH, |
dbae2c55 MC |
419 | |
420 | NR_STAT_GROUPS | |
421 | }; | |
422 | ||
2d9b02be BVA |
423 | static inline enum req_op bio_op(const struct bio *bio) |
424 | { | |
425 | return bio->bi_opf & REQ_OP_MASK; | |
426 | } | |
7cc01581 | 427 | |
342a72a3 | 428 | static inline bool op_is_write(blk_opf_t op) |
87374179 | 429 | { |
342a72a3 | 430 | return !!(op & (__force blk_opf_t)1); |
87374179 CH |
431 | } |
432 | ||
f73f44eb CH |
433 | /* |
434 | * Check if the bio or request is one that needs special treatment in the | |
435 | * flush state machine. | |
436 | */ | |
342a72a3 | 437 | static inline bool op_is_flush(blk_opf_t op) |
f73f44eb CH |
438 | { |
439 | return op & (REQ_FUA | REQ_PREFLUSH); | |
440 | } | |
441 | ||
b685d3d6 CH |
442 | /* |
443 | * Reads are always treated as synchronous, as are requests with the FUA or | |
444 | * PREFLUSH flag. Other operations may be marked as synchronous using the | |
445 | * REQ_SYNC flag. | |
446 | */ | |
342a72a3 | 447 | static inline bool op_is_sync(blk_opf_t op) |
ef295ecf | 448 | { |
b685d3d6 CH |
449 | return (op & REQ_OP_MASK) == REQ_OP_READ || |
450 | (op & (REQ_SYNC | REQ_FUA | REQ_PREFLUSH)); | |
ef295ecf | 451 | } |
c11f0c0b | 452 | |
342a72a3 | 453 | static inline bool op_is_discard(blk_opf_t op) |
bdca3c87 MC |
454 | { |
455 | return (op & REQ_OP_MASK) == REQ_OP_DISCARD; | |
456 | } | |
457 | ||
6c1b1da5 AJ |
458 | /* |
459 | * Check if a bio or request operation is a zone management operation, with | |
460 | * the exception of REQ_OP_ZONE_RESET_ALL which is treated as a special case | |
461 | * due to its different handling in the block layer and device response in | |
462 | * case of command failure. | |
463 | */ | |
ff07a02e | 464 | static inline bool op_is_zone_mgmt(enum req_op op) |
6c1b1da5 AJ |
465 | { |
466 | switch (op & REQ_OP_MASK) { | |
467 | case REQ_OP_ZONE_RESET: | |
468 | case REQ_OP_ZONE_OPEN: | |
469 | case REQ_OP_ZONE_CLOSE: | |
470 | case REQ_OP_ZONE_FINISH: | |
471 | return true; | |
472 | default: | |
473 | return false; | |
474 | } | |
475 | } | |
476 | ||
77e7ffd7 | 477 | static inline int op_stat_group(enum req_op op) |
ddcf35d3 | 478 | { |
bdca3c87 MC |
479 | if (op_is_discard(op)) |
480 | return STAT_DISCARD; | |
ddcf35d3 MC |
481 | return op_is_write(op); |
482 | } | |
483 | ||
cf43e6be | 484 | struct blk_rq_stat { |
eca8b53a | 485 | u64 mean; |
cf43e6be JA |
486 | u64 min; |
487 | u64 max; | |
eca8b53a | 488 | u32 nr_samples; |
cf43e6be | 489 | u64 batch; |
cf43e6be JA |
490 | }; |
491 | ||
7cc01581 | 492 | #endif /* __LINUX_BLK_TYPES_H */ |