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hc
2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376 
 kernel/fs/btrfs/volumes.h
....@@ -17,10 +17,19 @@
1717 
1818 #define BTRFS_STRIPE_LEN	SZ_64K
1919 
20
-struct buffer_head;
21
-struct btrfs_pending_bios {
22
-	struct bio *head;
23
-	struct bio *tail;
20
+struct btrfs_io_geometry {
21
+	/* remaining bytes before crossing a stripe */
22
+	u64 len;
23
+	/* offset of logical address in chunk */
24
+	u64 offset;
25
+	/* length of single IO stripe */
26
+	u64 stripe_len;
27
+	/* number of stripe where address falls */
28
+	u64 stripe_nr;
29
+	/* offset of address in stripe */
30
+	u64 stripe_offset;
31
+	/* offset of raid56 stripe into the chunk */
32
+	u64 raid56_stripe_offset;
2433 };
2534 
2635 /*
....@@ -41,28 +50,18 @@
4150 #define BTRFS_DEV_STATE_MISSING		(2)
4251 #define BTRFS_DEV_STATE_REPLACE_TGT	(3)
4352 #define BTRFS_DEV_STATE_FLUSH_SENT	(4)
53
+#define BTRFS_DEV_STATE_NO_READA	(5)
4454 
4555 struct btrfs_device {
46
-	struct list_head dev_list;
47
-	struct list_head dev_alloc_list;
56
+	struct list_head dev_list; /* device_list_mutex */
57
+	struct list_head dev_alloc_list; /* chunk mutex */
58
+	struct list_head post_commit_list; /* chunk mutex */
4859 	struct btrfs_fs_devices *fs_devices;
4960 	struct btrfs_fs_info *fs_info;
5061 
51
-	struct rcu_string *name;
62
+	struct rcu_string __rcu *name;
5263 
5364 	u64 generation;
54
-
55
-	spinlock_t io_lock ____cacheline_aligned;
56
-	int running_pending;
57
-	/* When true means this device has pending chunk alloc in
58
-	 * current transaction. Protected by chunk_mutex.
59
-	 */
60
-	bool has_pending_chunks;
61
-
62
-	/* regular prio bios */
63
-	struct btrfs_pending_bios pending_bios;
64
-	/* sync bios */
65
-	struct btrfs_pending_bios pending_sync_bios;
6665 
6766 	struct block_device *bdev;
6867 
....@@ -71,7 +70,6 @@
7170 
7271 	unsigned long dev_state;
7372 	blk_status_t last_flush_error;
74
-	int flush_bio_sent;
7573 
7674 #ifdef __BTRFS_NEED_DEVICE_DATA_ORDERED
7775 	seqcount_t data_seqcount;
....@@ -107,18 +105,12 @@
107105 	 * size of the device on the current transaction
108106 	 *
109107 	 * This variant is update when committing the transaction,
110
-	 * and protected by device_list_mutex
108
+	 * and protected by chunk mutex
111109 	 */
112110 	u64 commit_total_bytes;
113111 
114112 	/* bytes used on the current transaction */
115113 	u64 commit_bytes_used;
116
-	/*
117
-	 * used to manage the device which is resized
118
-	 *
119
-	 * It is protected by chunk_lock.
120
-	 */
121
-	struct list_head resized_list;
122114 
123115 	/* for sending down flush barriers */
124116 	struct bio *flush_bio;
....@@ -126,9 +118,6 @@
126118 
127119 	/* per-device scrub information */
128120 	struct scrub_ctx *scrub_ctx;
129
-
130
-	struct btrfs_work work;
131
-	struct rcu_head rcu;
132121 
133122 	/* readahead state */
134123 	atomic_t reada_in_flight;
....@@ -144,6 +133,12 @@
144133 	/* Counter to record the change of device stats */
145134 	atomic_t dev_stats_ccnt;
146135 	atomic_t dev_stat_values[BTRFS_DEV_STAT_VALUES_MAX];
136
+
137
+	struct extent_io_tree alloc_state;
138
+
139
+	struct completion kobj_unregister;
140
+	/* For sysfs/FSID/devinfo/devid/ */
141
+	struct kobject devid_kobj;
147142 };
148143 
149144 /*
....@@ -174,7 +169,7 @@
174169 	write_seqcount_end(&dev->data_seqcount);			\
175170 	preempt_enable();						\
176171 }
177
-#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPT)
172
+#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPTION)
178173 #define BTRFS_DEVICE_GETSET_FUNCS(name)					\
179174 static inline u64							\
180175 btrfs_device_get_##name(const struct btrfs_device *dev)			\
....@@ -213,8 +208,14 @@
213208 BTRFS_DEVICE_GETSET_FUNCS(disk_total_bytes);
214209 BTRFS_DEVICE_GETSET_FUNCS(bytes_used);
215210 
211
+enum btrfs_chunk_allocation_policy {
212
+	BTRFS_CHUNK_ALLOC_REGULAR,
213
+};
214
+
216215 struct btrfs_fs_devices {
217216 	u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
217
+	u8 metadata_uuid[BTRFS_FSID_SIZE];
218
+	bool fsid_change;
218219 	struct list_head fs_list;
219220 
220221 	u64 num_devices;
....@@ -223,6 +224,10 @@
223224 	u64 missing_devices;
224225 	u64 total_rw_bytes;
225226 	u64 total_devices;
227
+
228
+	/* Highest generation number of seen devices */
229
+	u64 latest_generation;
230
+
226231 	struct block_device *latest_bdev;
227232 
228233 	/* all of the devices in the FS, protected by a mutex
....@@ -232,27 +237,34 @@
232237 	 * this mutex lock.
233238 	 */
234239 	struct mutex device_list_mutex;
240
+
241
+	/* List of all devices, protected by device_list_mutex */
235242 	struct list_head devices;
236243 
237
-	struct list_head resized_devices;
238
-	/* devices not currently being allocated */
244
+	/*
245
+	 * Devices which can satisfy space allocation. Protected by
246
+	 * chunk_mutex
247
+	 */
239248 	struct list_head alloc_list;
240249 
241
-	struct btrfs_fs_devices *seed;
242
-	int seeding;
250
+	struct list_head seed_list;
251
+	bool seeding;
243252 
244253 	int opened;
245254 
246255 	/* set when we find or add a device that doesn't have the
247256 	 * nonrot flag set
248257 	 */
249
-	int rotating;
258
+	bool rotating;
250259 
251260 	struct btrfs_fs_info *fs_info;
252261 	/* sysfs kobjects */
253262 	struct kobject fsid_kobj;
254
-	struct kobject *device_dir_kobj;
263
+	struct kobject *devices_kobj;
264
+	struct kobject *devinfo_kobj;
255265 	struct completion kobj_unregister;
266
+
267
+	enum btrfs_chunk_allocation_policy chunk_alloc_policy;
256268 };
257269 
258270 #define BTRFS_BIO_INLINE_CSUM_SIZE	64
....@@ -275,15 +287,12 @@
275287  * we allocate are actually btrfs_io_bios.  We'll cram as much of
276288  * struct btrfs_bio as we can into this over time.
277289  */
278
-typedef void (btrfs_io_bio_end_io_t) (struct btrfs_io_bio *bio, int err);
279290 struct btrfs_io_bio {
280291 	unsigned int mirror_num;
281
-	unsigned int stripe_index;
292
+	struct btrfs_device *device;
282293 	u64 logical;
283294 	u8 *csum;
284295 	u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE];
285
-	u8 *csum_allocated;
286
-	btrfs_io_bio_end_io_t *end_io;
287296 	struct bvec_iter iter;
288297 	/*
289298 	 * This member must come last, bio_alloc_bioset will allocate enough
....@@ -297,14 +306,19 @@
297306 	return container_of(bio, struct btrfs_io_bio, bio);
298307 }
299308 
309
+static inline void btrfs_io_bio_free_csum(struct btrfs_io_bio *io_bio)
310
+{
311
+	if (io_bio->csum != io_bio->csum_inline) {
312
+		kfree(io_bio->csum);
313
+		io_bio->csum = NULL;
314
+	}
315
+}
316
+
300317 struct btrfs_bio_stripe {
301318 	struct btrfs_device *dev;
302319 	u64 physical;
303320 	u64 length; /* only used for discard mappings */
304321 };
305
-
306
-struct btrfs_bio;
307
-typedef void (btrfs_bio_end_io_t) (struct btrfs_bio *bio, int err);
308322 
309323 struct btrfs_bio {
310324 	refcount_t refs;
....@@ -337,14 +351,16 @@
337351 };
338352 
339353 struct btrfs_raid_attr {
340
-	int sub_stripes;	/* sub_stripes info for map */
341
-	int dev_stripes;	/* stripes per dev */
342
-	int devs_max;		/* max devs to use */
343
-	int devs_min;		/* min devs needed */
344
-	int tolerated_failures; /* max tolerated fail devs */
345
-	int devs_increment;	/* ndevs has to be a multiple of this */
346
-	int ncopies;		/* how many copies to data has */
347
-	int mindev_error;	/* error code if min devs requisite is unmet */
354
+	u8 sub_stripes;		/* sub_stripes info for map */
355
+	u8 dev_stripes;		/* stripes per dev */
356
+	u8 devs_max;		/* max devs to use */
357
+	u8 devs_min;		/* min devs needed */
358
+	u8 tolerated_failures;	/* max tolerated fail devs */
359
+	u8 devs_increment;	/* ndevs has to be a multiple of this */
360
+	u8 ncopies;		/* how many copies to data has */
361
+	u8 nparity;		/* number of stripes worth of bytes to store
362
+				 * parity information */
363
+	u8 mindev_error;	/* error code if min devs requisite is unmet */
348364 	const char raid_name[8]; /* name of the raid */
349365 	u64 bg_flag;		/* block group flag of the raid */
350366 };
....@@ -393,6 +409,7 @@
393409 		return BTRFS_MAP_WRITE;
394410 	default:
395411 		WARN_ON_ONCE(1);
412
+		fallthrough;
396413 	case REQ_OP_READ:
397414 		return BTRFS_MAP_READ;
398415 	}
....@@ -406,29 +423,26 @@
406423 int btrfs_map_sblock(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
407424 		     u64 logical, u64 *length,
408425 		     struct btrfs_bio **bbio_ret);
409
-int btrfs_rmap_block(struct btrfs_fs_info *fs_info, u64 chunk_start,
410
-		     u64 physical, u64 **logical, int *naddrs, int *stripe_len);
426
+int btrfs_get_io_geometry(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
427
+		u64 logical, u64 len, struct btrfs_io_geometry *io_geom);
411428 int btrfs_read_sys_array(struct btrfs_fs_info *fs_info);
412429 int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info);
413430 int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, u64 type);
414
-void btrfs_mapping_init(struct btrfs_mapping_tree *tree);
415
-void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree);
431
+void btrfs_mapping_tree_free(struct extent_map_tree *tree);
416432 blk_status_t btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
417
-			   int mirror_num, int async_submit);
433
+			   int mirror_num);
418434 int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
419435 		       fmode_t flags, void *holder);
420436 struct btrfs_device *btrfs_scan_one_device(const char *path,
421437 					   fmode_t flags, void *holder);
422
-int btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
438
+int btrfs_forget_devices(const char *path);
439
+void btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
423440 void btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices, int step);
424441 void btrfs_assign_next_active_device(struct btrfs_device *device,
425442 				     struct btrfs_device *this_dev);
426
-int btrfs_find_device_missing_or_by_path(struct btrfs_fs_info *fs_info,
427
-					 const char *device_path,
428
-					 struct btrfs_device **device);
429
-int btrfs_find_device_by_devspec(struct btrfs_fs_info *fs_info, u64 devid,
430
-					 const char *devpath,
431
-					 struct btrfs_device **device);
443
+struct btrfs_device *btrfs_find_device_by_devspec(struct btrfs_fs_info *fs_info,
444
+						  u64 devid,
445
+						  const char *devpath);
432446 struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info,
433447 					const u64 *devid,
434448 					const u8 *uuid);
....@@ -446,31 +460,25 @@
446460 int btrfs_balance(struct btrfs_fs_info *fs_info,
447461 		  struct btrfs_balance_control *bctl,
448462 		  struct btrfs_ioctl_balance_args *bargs);
463
+void btrfs_describe_block_groups(u64 flags, char *buf, u32 size_buf);
449464 int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info);
450465 int btrfs_recover_balance(struct btrfs_fs_info *fs_info);
451466 int btrfs_pause_balance(struct btrfs_fs_info *fs_info);
452467 int btrfs_cancel_balance(struct btrfs_fs_info *fs_info);
453468 int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info);
454
-int btrfs_check_uuid_tree(struct btrfs_fs_info *fs_info);
469
+int btrfs_uuid_scan_kthread(void *data);
455470 int btrfs_chunk_readonly(struct btrfs_fs_info *fs_info, u64 chunk_offset);
456
-int find_free_dev_extent_start(struct btrfs_transaction *transaction,
457
-			 struct btrfs_device *device, u64 num_bytes,
458
-			 u64 search_start, u64 *start, u64 *max_avail);
459
-int find_free_dev_extent(struct btrfs_trans_handle *trans,
460
-			 struct btrfs_device *device, u64 num_bytes,
471
+int find_free_dev_extent(struct btrfs_device *device, u64 num_bytes,
461472 			 u64 *start, u64 *max_avail);
462473 void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index);
463474 int btrfs_get_dev_stats(struct btrfs_fs_info *fs_info,
464475 			struct btrfs_ioctl_get_dev_stats *stats);
465476 void btrfs_init_devices_late(struct btrfs_fs_info *fs_info);
466477 int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info);
467
-int btrfs_run_dev_stats(struct btrfs_trans_handle *trans,
468
-			struct btrfs_fs_info *fs_info);
478
+int btrfs_run_dev_stats(struct btrfs_trans_handle *trans);
469479 void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_device *srcdev);
470
-void btrfs_rm_dev_replace_free_srcdev(struct btrfs_fs_info *fs_info,
471
-				      struct btrfs_device *srcdev);
480
+void btrfs_rm_dev_replace_free_srcdev(struct btrfs_device *srcdev);
472481 void btrfs_destroy_dev_replace_tgtdev(struct btrfs_device *tgtdev);
473
-void btrfs_scratch_superblocks(struct block_device *bdev, const char *device_path);
474482 int btrfs_is_parity_mirror(struct btrfs_fs_info *fs_info,
475483 			   u64 logical, u64 len);
476484 unsigned long btrfs_full_stripe_len(struct btrfs_fs_info *fs_info,
....@@ -478,6 +486,9 @@
478486 int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans,
479487 			     u64 chunk_offset, u64 chunk_size);
480488 int btrfs_remove_chunk(struct btrfs_trans_handle *trans, u64 chunk_offset);
489
+struct extent_map *btrfs_get_chunk_map(struct btrfs_fs_info *fs_info,
490
+				       u64 logical, u64 length);
491
+void btrfs_release_disk_super(struct btrfs_super_block *super);
481492 
482493 static inline void btrfs_dev_stat_inc(struct btrfs_device *dev,
483494 				      int index)
....@@ -530,12 +541,6 @@
530541 	atomic_inc(&dev->dev_stats_ccnt);
531542 }
532543 
533
-static inline void btrfs_dev_stat_reset(struct btrfs_device *dev,
534
-					int index)
535
-{
536
-	btrfs_dev_stat_set(dev, index, 0);
537
-}
538
-
539544 /*
540545  * Convert block group flags (BTRFS_BLOCK_GROUP_*) to btrfs_raid_types, which
541546  * can be used as index to access btrfs_raid_array[].
....@@ -546,6 +551,10 @@
546551 		return BTRFS_RAID_RAID10;
547552 	else if (flags & BTRFS_BLOCK_GROUP_RAID1)
548553 		return BTRFS_RAID_RAID1;
554
+	else if (flags & BTRFS_BLOCK_GROUP_RAID1C3)
555
+		return BTRFS_RAID_RAID1C3;
556
+	else if (flags & BTRFS_BLOCK_GROUP_RAID1C4)
557
+		return BTRFS_RAID_RAID1C4;
549558 	else if (flags & BTRFS_BLOCK_GROUP_DUP)
550559 		return BTRFS_RAID_DUP;
551560 	else if (flags & BTRFS_BLOCK_GROUP_RAID0)
....@@ -558,18 +567,17 @@
558567 	return BTRFS_RAID_SINGLE; /* BTRFS_BLOCK_GROUP_SINGLE */
559568 }
560569 
561
-const char *get_raid_name(enum btrfs_raid_types type);
570
+void btrfs_commit_device_sizes(struct btrfs_transaction *trans);
562571 
563
-void btrfs_update_commit_device_size(struct btrfs_fs_info *fs_info);
564
-void btrfs_update_commit_device_bytes_used(struct btrfs_transaction *trans);
565
-
566
-struct list_head *btrfs_get_fs_uuids(void);
567
-void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info);
568
-void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info);
572
+struct list_head * __attribute_const__ btrfs_get_fs_uuids(void);
569573 bool btrfs_check_rw_degradable(struct btrfs_fs_info *fs_info,
570574 					struct btrfs_device *failing_dev);
575
+void btrfs_scratch_superblocks(struct btrfs_fs_info *fs_info,
576
+			       struct block_device *bdev,
577
+			       const char *device_path);
571578 
572579 int btrfs_bg_type_to_factor(u64 flags);
580
+const char *btrfs_bg_type_to_raid_name(u64 flags);
573581 int btrfs_verify_dev_extents(struct btrfs_fs_info *fs_info);
574582 
575583 #endif