summaryrefslogtreecommitdiff
path: root/include/linux/ceph/osd_client.h
blob: adf670ecaf94688449f92f240dd3f0bde3b87500 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
#ifndef _FS_CEPH_OSD_CLIENT_H
#define _FS_CEPH_OSD_CLIENT_H

#include <linux/bitrev.h>
#include <linux/completion.h>
#include <linux/kref.h>
#include <linux/mempool.h>
#include <linux/rbtree.h>
#include <linux/refcount.h>

#include <linux/ceph/types.h>
#include <linux/ceph/osdmap.h>
#include <linux/ceph/messenger.h>
#include <linux/ceph/msgpool.h>
#include <linux/ceph/auth.h>
#include <linux/ceph/pagelist.h>

struct ceph_msg;
struct ceph_snap_context;
struct ceph_osd_request;
struct ceph_osd_client;

/*
 * completion callback for async writepages
 */
typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *);

#define CEPH_HOMELESS_OSD	-1

/* a given osd we're communicating with */
struct ceph_osd {
	refcount_t o_ref;
	struct ceph_osd_client *o_osdc;
	int o_osd;
	int o_incarnation;
	struct rb_node o_node;
	struct ceph_connection o_con;
	struct rb_root o_requests;
	struct rb_root o_linger_requests;
	struct rb_root o_backoff_mappings;
	struct rb_root o_backoffs_by_id;
	struct list_head o_osd_lru;
	struct ceph_auth_handshake o_auth;
	unsigned long lru_ttl;
	struct list_head o_keepalive_item;
	struct mutex lock;
};

#define CEPH_OSD_SLAB_OPS	2
#define CEPH_OSD_MAX_OPS	16

enum ceph_osd_data_type {
	CEPH_OSD_DATA_TYPE_NONE = 0,
	CEPH_OSD_DATA_TYPE_PAGES,
	CEPH_OSD_DATA_TYPE_PAGELIST,
#ifdef CONFIG_BLOCK
	CEPH_OSD_DATA_TYPE_BIO,
#endif /* CONFIG_BLOCK */
};

struct ceph_osd_data {
	enum ceph_osd_data_type	type;
	union {
		struct {
			struct page	**pages;
			u64		length;
			u32		alignment;
			bool		pages_from_pool;
			bool		own_pages;
		};
		struct ceph_pagelist	*pagelist;
#ifdef CONFIG_BLOCK
		struct {
			struct bio	*bio;		/* list of bios */
			size_t		bio_length;	/* total in list */
		};
#endif /* CONFIG_BLOCK */
	};
};

struct ceph_osd_req_op {
	u16 op;           /* CEPH_OSD_OP_* */
	u32 flags;        /* CEPH_OSD_OP_FLAG_* */
	u32 indata_len;   /* request */
	u32 outdata_len;  /* reply */
	s32 rval;

	union {
		struct ceph_osd_data raw_data_in;
		struct {
			u64 offset, length;
			u64 truncate_size;
			u32 truncate_seq;
			struct ceph_osd_data osd_data;
		} extent;
		struct {
			u32 name_len;
			u32 value_len;
			__u8 cmp_op;       /* CEPH_OSD_CMPXATTR_OP_* */
			__u8 cmp_mode;     /* CEPH_OSD_CMPXATTR_MODE_* */
			struct ceph_osd_data osd_data;
		} xattr;
		struct {
			const char *class_name;
			const char *method_name;
			struct ceph_osd_data request_info;
			struct ceph_osd_data request_data;
			struct ceph_osd_data response_data;
			__u8 class_len;
			__u8 method_len;
			u32 indata_len;
		} cls;
		struct {
			u64 cookie;
			__u8 op;           /* CEPH_OSD_WATCH_OP_ */
			u32 gen;
		} watch;
		struct {
			struct ceph_osd_data request_data;
		} notify_ack;
		struct {
			u64 cookie;
			struct ceph_osd_data request_data;
			struct ceph_osd_data response_data;
		} notify;
		struct {
			struct ceph_osd_data response_data;
		} list_watchers;
		struct {
			u64 expected_object_size;
			u64 expected_write_size;
		} alloc_hint;
	};
};

struct ceph_osd_request_target {
	struct ceph_object_id base_oid;
	struct ceph_object_locator base_oloc;
	struct ceph_object_id target_oid;
	struct ceph_object_locator target_oloc;

	struct ceph_pg pgid;               /* last raw pg we mapped to */
	struct ceph_spg spgid;             /* last actual spg we mapped to */
	u32 pg_num;
	u32 pg_num_mask;
	struct ceph_osds acting;
	struct ceph_osds up;
	int size;
	int min_size;
	bool sort_bitwise;
	bool recovery_deletes;

	unsigned int flags;                /* CEPH_OSD_FLAG_* */
	bool paused;

	u32 epoch;
	u32 last_force_resend;

	int osd;
};

/* an in-flight request */
struct ceph_osd_request {
	u64             r_tid;              /* unique for this client */
	struct rb_node  r_node;
	struct rb_node  r_mc_node;          /* map check */
	struct ceph_osd *r_osd;

	struct ceph_osd_request_target r_t;
#define r_base_oid	r_t.base_oid
#define r_base_oloc	r_t.base_oloc
#define r_flags		r_t.flags

	struct ceph_msg  *r_request, *r_reply;
	u32               r_sent;      /* >0 if r_request is sending/sent */

	/* request osd ops array  */
	unsigned int		r_num_ops;

	int               r_result;

	struct ceph_osd_client *r_osdc;
	struct kref       r_kref;
	bool              r_mempool;
	struct completion r_completion;       /* private to osd_client.c */
	ceph_osdc_callback_t r_callback;
	struct list_head  r_unsafe_item;

	struct inode *r_inode;         	      /* for use by callbacks */
	void *r_priv;			      /* ditto */

	/* set by submitter */
	u64 r_snapid;                         /* for reads, CEPH_NOSNAP o/w */
	struct ceph_snap_context *r_snapc;    /* for writes */
	struct timespec r_mtime;              /* ditto */
	u64 r_data_offset;                    /* ditto */
	bool r_linger;                        /* don't resend on failure */
	bool r_abort_on_full;		      /* return ENOSPC when full */

	/* internal */
	unsigned long r_stamp;                /* jiffies, send or check time */
	unsigned long r_start_stamp;          /* jiffies */
	int r_attempts;
	u32 r_map_dne_bound;

	struct ceph_osd_req_op r_ops[];
};

struct ceph_request_redirect {
	struct ceph_object_locator oloc;
};

/*
 * osd request identifier
 *
 * caller name + incarnation# + tid to unique identify this request
 */
struct ceph_osd_reqid {
	struct ceph_entity_name name;
	__le64 tid;
	__le32 inc;
} __packed;

struct ceph_blkin_trace_info {
	__le64 trace_id;
	__le64 span_id;
	__le64 parent_span_id;
} __packed;

typedef void (*rados_watchcb2_t)(void *arg, u64 notify_id, u64 cookie,
				 u64 notifier_id, void *data, size_t data_len);
typedef void (*rados_watcherrcb_t)(void *arg, u64 cookie, int err);

struct ceph_osd_linger_request {
	struct ceph_osd_client *osdc;
	u64 linger_id;
	bool committed;
	bool is_watch;                  /* watch or notify */

	struct ceph_osd *osd;
	struct ceph_osd_request *reg_req;
	struct ceph_osd_request *ping_req;
	unsigned long ping_sent;
	unsigned long watch_valid_thru;
	struct list_head pending_lworks;

	struct ceph_osd_request_target t;
	u32 map_dne_bound;

	struct timespec mtime;

	struct kref kref;
	struct mutex lock;
	struct rb_node node;            /* osd */
	struct rb_node osdc_node;       /* osdc */
	struct rb_node mc_node;         /* map check */
	struct list_head scan_item;

	struct completion reg_commit_wait;
	struct completion notify_finish_wait;
	int reg_commit_error;
	int notify_finish_error;
	int last_error;

	u32 register_gen;
	u64 notify_id;

	rados_watchcb2_t wcb;
	rados_watcherrcb_t errcb;
	void *data;

	struct page ***preply_pages;
	size_t *preply_len;
};

struct ceph_watch_item {
	struct ceph_entity_name name;
	u64 cookie;
	struct ceph_entity_addr addr;
};

struct ceph_spg_mapping {
	struct rb_node node;
	struct ceph_spg spgid;

	struct rb_root backoffs;
};

struct ceph_hobject_id {
	void *key;
	size_t key_len;
	void *oid;
	size_t oid_len;
	u64 snapid;
	u32 hash;
	u8 is_max;
	void *nspace;
	size_t nspace_len;
	s64 pool;

	/* cache */
	u32 hash_reverse_bits;
};

static inline void ceph_hoid_build_hash_cache(struct ceph_hobject_id *hoid)
{
	hoid->hash_reverse_bits = bitrev32(hoid->hash);
}

/*
 * PG-wide backoff: [begin, end)
 * per-object backoff: begin == end
 */
struct ceph_osd_backoff {
	struct rb_node spg_node;
	struct rb_node id_node;

	struct ceph_spg spgid;
	u64 id;
	struct ceph_hobject_id *begin;
	struct ceph_hobject_id *end;
};

#define CEPH_LINGER_ID_START	0xffff000000000000ULL

struct ceph_osd_client {
	struct ceph_client     *client;

	struct ceph_osdmap     *osdmap;       /* current map */
	struct rw_semaphore    lock;

	struct rb_root         osds;          /* osds */
	struct list_head       osd_lru;       /* idle osds */
	spinlock_t             osd_lru_lock;
	u32		       epoch_barrier;
	struct ceph_osd        homeless_osd;
	atomic64_t             last_tid;      /* tid of last request */
	u64                    last_linger_id;
	struct rb_root         linger_requests; /* lingering requests */
	struct rb_root         map_checks;
	struct rb_root         linger_map_checks;
	atomic_t               num_requests;
	atomic_t               num_homeless;
	struct delayed_work    timeout_work;
	struct delayed_work    osds_timeout_work;
#ifdef CONFIG_DEBUG_FS
	struct dentry 	       *debugfs_file;
#endif

	mempool_t              *req_mempool;

	struct ceph_msgpool	msgpool_op;
	struct ceph_msgpool	msgpool_op_reply;

	struct workqueue_struct	*notify_wq;
};

static inline bool ceph_osdmap_flag(struct ceph_osd_client *osdc, int flag)
{
	return osdc->osdmap->flags & flag;
}

extern int ceph_osdc_setup(void);
extern void ceph_osdc_cleanup(void);

extern int ceph_osdc_init(struct ceph_osd_client *osdc,
			  struct ceph_client *client);
extern void ceph_osdc_stop(struct ceph_osd_client *osdc);

extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
				   struct ceph_msg *msg);
extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
				 struct ceph_msg *msg);
void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb);

extern void osd_req_op_init(struct ceph_osd_request *osd_req,
			    unsigned int which, u16 opcode, u32 flags);

extern void osd_req_op_raw_data_in_pages(struct ceph_osd_request *,
					unsigned int which,
					struct page **pages, u64 length,
					u32 alignment, bool pages_from_pool,
					bool own_pages);

extern void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
					unsigned int which, u16 opcode,
					u64 offset, u64 length,
					u64 truncate_size, u32 truncate_seq);
extern void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
					unsigned int which, u64 length);
extern void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
				       unsigned int which, u64 offset_inc);

extern struct ceph_osd_data *osd_req_op_extent_osd_data(
					struct ceph_osd_request *osd_req,
					unsigned int which);

extern void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *,
					unsigned int which,
					struct page **pages, u64 length,
					u32 alignment, bool pages_from_pool,
					bool own_pages);
extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *,
					unsigned int which,
					struct ceph_pagelist *pagelist);
#ifdef CONFIG_BLOCK
extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *,
					unsigned int which,
					struct bio *bio, size_t bio_length);
#endif /* CONFIG_BLOCK */

extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request *,
					unsigned int which,
					struct ceph_pagelist *pagelist);
extern void osd_req_op_cls_request_data_pages(struct ceph_osd_request *,
					unsigned int which,
					struct page **pages, u64 length,
					u32 alignment, bool pages_from_pool,
					bool own_pages);
extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *,
					unsigned int which,
					struct page **pages, u64 length,
					u32 alignment, bool pages_from_pool,
					bool own_pages);
extern void osd_req_op_cls_init(struct ceph_osd_request *osd_req,
					unsigned int which, u16 opcode,
					const char *class, const char *method);
extern int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
				 u16 opcode, const char *name, const void *value,
				 size_t size, u8 cmp_op, u8 cmp_mode);
extern void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
				       unsigned int which,
				       u64 expected_object_size,
				       u64 expected_write_size);

extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
					       struct ceph_snap_context *snapc,
					       unsigned int num_ops,
					       bool use_mempool,
					       gfp_t gfp_flags);
int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp);

extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
				      struct ceph_file_layout *layout,
				      struct ceph_vino vino,
				      u64 offset, u64 *len,
				      unsigned int which, int num_ops,
				      int opcode, int flags,
				      struct ceph_snap_context *snapc,
				      u32 truncate_seq, u64 truncate_size,
				      bool use_mempool);

extern void ceph_osdc_get_request(struct ceph_osd_request *req);
extern void ceph_osdc_put_request(struct ceph_osd_request *req);

extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
				   struct ceph_osd_request *req,
				   bool nofail);
extern void ceph_osdc_cancel_request(struct ceph_osd_request *req);
extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
				  struct ceph_osd_request *req);
extern void ceph_osdc_sync(struct ceph_osd_client *osdc);

extern void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc);
void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc);

int ceph_osdc_call(struct ceph_osd_client *osdc,
		   struct ceph_object_id *oid,
		   struct ceph_object_locator *oloc,
		   const char *class, const char *method,
		   unsigned int flags,
		   struct page *req_page, size_t req_len,
		   struct page *resp_page, size_t *resp_len);

extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
			       struct ceph_vino vino,
			       struct ceph_file_layout *layout,
			       u64 off, u64 *plen,
			       u32 truncate_seq, u64 truncate_size,
			       struct page **pages, int nr_pages,
			       int page_align);

extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
				struct ceph_vino vino,
				struct ceph_file_layout *layout,
				struct ceph_snap_context *sc,
				u64 off, u64 len,
				u32 truncate_seq, u64 truncate_size,
				struct timespec *mtime,
				struct page **pages, int nr_pages);

/* watch/notify */
struct ceph_osd_linger_request *
ceph_osdc_watch(struct ceph_osd_client *osdc,
		struct ceph_object_id *oid,
		struct ceph_object_locator *oloc,
		rados_watchcb2_t wcb,
		rados_watcherrcb_t errcb,
		void *data);
int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
		      struct ceph_osd_linger_request *lreq);

int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
			 struct ceph_object_id *oid,
			 struct ceph_object_locator *oloc,
			 u64 notify_id,
			 u64 cookie,
			 void *payload,
			 size_t payload_len);
int ceph_osdc_notify(struct ceph_osd_client *osdc,
		     struct ceph_object_id *oid,
		     struct ceph_object_locator *oloc,
		     void *payload,
		     size_t payload_len,
		     u32 timeout,
		     struct page ***preply_pages,
		     size_t *preply_len);
int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
			  struct ceph_osd_linger_request *lreq);
int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
			    struct ceph_object_id *oid,
			    struct ceph_object_locator *oloc,
			    struct ceph_watch_item **watchers,
			    u32 *num_watchers);
#endif