Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef _FS_CEPH_OSD_CLIENT_H
2#define _FS_CEPH_OSD_CLIENT_H
3
4#include <linux/completion.h>
5#include <linux/kref.h>
6#include <linux/mempool.h>
7#include <linux/rbtree.h>
8
9#include <linux/ceph/types.h>
10#include <linux/ceph/osdmap.h>
11#include <linux/ceph/messenger.h>
12#include <linux/ceph/msgpool.h>
13#include <linux/ceph/auth.h>
14#include <linux/ceph/pagelist.h>
15
16struct ceph_msg;
17struct ceph_snap_context;
18struct ceph_osd_request;
19struct ceph_osd_client;
20
21/*
22 * completion callback for async writepages
23 */
24typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *);
25typedef void (*ceph_osdc_unsafe_callback_t)(struct ceph_osd_request *, bool);
26
27#define CEPH_HOMELESS_OSD -1
28
29/* a given osd we're communicating with */
30struct ceph_osd {
31 atomic_t o_ref;
32 struct ceph_osd_client *o_osdc;
33 int o_osd;
34 int o_incarnation;
35 struct rb_node o_node;
36 struct ceph_connection o_con;
37 struct rb_root o_requests;
38 struct rb_root o_linger_requests;
39 struct list_head o_osd_lru;
40 struct ceph_auth_handshake o_auth;
41 unsigned long lru_ttl;
42 struct list_head o_keepalive_item;
43 struct mutex lock;
44};
45
46#define CEPH_OSD_SLAB_OPS 2
47#define CEPH_OSD_MAX_OPS 16
48
49enum ceph_osd_data_type {
50 CEPH_OSD_DATA_TYPE_NONE = 0,
51 CEPH_OSD_DATA_TYPE_PAGES,
52 CEPH_OSD_DATA_TYPE_PAGELIST,
53#ifdef CONFIG_BLOCK
54 CEPH_OSD_DATA_TYPE_BIO,
55#endif /* CONFIG_BLOCK */
56};
57
58struct ceph_osd_data {
59 enum ceph_osd_data_type type;
60 union {
61 struct {
62 struct page **pages;
63 u64 length;
64 u32 alignment;
65 bool pages_from_pool;
66 bool own_pages;
67 };
68 struct ceph_pagelist *pagelist;
69#ifdef CONFIG_BLOCK
70 struct {
71 struct bio *bio; /* list of bios */
72 size_t bio_length; /* total in list */
73 };
74#endif /* CONFIG_BLOCK */
75 };
76};
77
78struct ceph_osd_req_op {
79 u16 op; /* CEPH_OSD_OP_* */
80 u32 flags; /* CEPH_OSD_OP_FLAG_* */
81 u32 indata_len; /* request */
82 u32 outdata_len; /* reply */
83 s32 rval;
84
85 union {
86 struct ceph_osd_data raw_data_in;
87 struct {
88 u64 offset, length;
89 u64 truncate_size;
90 u32 truncate_seq;
91 struct ceph_osd_data osd_data;
92 } extent;
93 struct {
94 u32 name_len;
95 u32 value_len;
96 __u8 cmp_op; /* CEPH_OSD_CMPXATTR_OP_* */
97 __u8 cmp_mode; /* CEPH_OSD_CMPXATTR_MODE_* */
98 struct ceph_osd_data osd_data;
99 } xattr;
100 struct {
101 const char *class_name;
102 const char *method_name;
103 struct ceph_osd_data request_info;
104 struct ceph_osd_data request_data;
105 struct ceph_osd_data response_data;
106 __u8 class_len;
107 __u8 method_len;
108 u32 indata_len;
109 } cls;
110 struct {
111 u64 cookie;
112 __u8 op; /* CEPH_OSD_WATCH_OP_ */
113 u32 gen;
114 } watch;
115 struct {
116 struct ceph_osd_data request_data;
117 } notify_ack;
118 struct {
119 u64 cookie;
120 struct ceph_osd_data request_data;
121 struct ceph_osd_data response_data;
122 } notify;
123 struct {
124 struct ceph_osd_data response_data;
125 } list_watchers;
126 struct {
127 u64 expected_object_size;
128 u64 expected_write_size;
129 } alloc_hint;
130 };
131};
132
133struct ceph_osd_request_target {
134 struct ceph_object_id base_oid;
135 struct ceph_object_locator base_oloc;
136 struct ceph_object_id target_oid;
137 struct ceph_object_locator target_oloc;
138
139 struct ceph_pg pgid;
140 u32 pg_num;
141 u32 pg_num_mask;
142 struct ceph_osds acting;
143 struct ceph_osds up;
144 int size;
145 int min_size;
146 bool sort_bitwise;
147
148 unsigned int flags; /* CEPH_OSD_FLAG_* */
149 bool paused;
150
151 int osd;
152};
153
154/* an in-flight request */
155struct ceph_osd_request {
156 u64 r_tid; /* unique for this client */
157 struct rb_node r_node;
158 struct rb_node r_mc_node; /* map check */
159 struct ceph_osd *r_osd;
160
161 struct ceph_osd_request_target r_t;
162#define r_base_oid r_t.base_oid
163#define r_base_oloc r_t.base_oloc
164#define r_flags r_t.flags
165
166 struct ceph_msg *r_request, *r_reply;
167 u32 r_sent; /* >0 if r_request is sending/sent */
168
169 /* request osd ops array */
170 unsigned int r_num_ops;
171
172 int r_result;
173 bool r_got_reply;
174
175 struct ceph_osd_client *r_osdc;
176 struct kref r_kref;
177 bool r_mempool;
178 struct completion r_completion;
179 struct completion r_safe_completion; /* fsync waiter */
180 ceph_osdc_callback_t r_callback;
181 ceph_osdc_unsafe_callback_t r_unsafe_callback;
182 struct list_head r_unsafe_item;
183
184 struct inode *r_inode; /* for use by callbacks */
185 void *r_priv; /* ditto */
186
187 /* set by submitter */
188 u64 r_snapid; /* for reads, CEPH_NOSNAP o/w */
189 struct ceph_snap_context *r_snapc; /* for writes */
190 struct timespec r_mtime; /* ditto */
191 u64 r_data_offset; /* ditto */
192 bool r_linger; /* don't resend on failure */
193
194 /* internal */
195 unsigned long r_stamp; /* jiffies, send or check time */
196 int r_attempts;
197 struct ceph_eversion r_replay_version; /* aka reassert_version */
198 u32 r_last_force_resend;
199 u32 r_map_dne_bound;
200
201 struct ceph_osd_req_op r_ops[];
202};
203
204struct ceph_request_redirect {
205 struct ceph_object_locator oloc;
206};
207
208typedef void (*rados_watchcb2_t)(void *arg, u64 notify_id, u64 cookie,
209 u64 notifier_id, void *data, size_t data_len);
210typedef void (*rados_watcherrcb_t)(void *arg, u64 cookie, int err);
211
212struct ceph_osd_linger_request {
213 struct ceph_osd_client *osdc;
214 u64 linger_id;
215 bool committed;
216 bool is_watch; /* watch or notify */
217
218 struct ceph_osd *osd;
219 struct ceph_osd_request *reg_req;
220 struct ceph_osd_request *ping_req;
221 unsigned long ping_sent;
222 unsigned long watch_valid_thru;
223 struct list_head pending_lworks;
224
225 struct ceph_osd_request_target t;
226 u32 last_force_resend;
227 u32 map_dne_bound;
228
229 struct timespec mtime;
230
231 struct kref kref;
232 struct mutex lock;
233 struct rb_node node; /* osd */
234 struct rb_node osdc_node; /* osdc */
235 struct rb_node mc_node; /* map check */
236 struct list_head scan_item;
237
238 struct completion reg_commit_wait;
239 struct completion notify_finish_wait;
240 int reg_commit_error;
241 int notify_finish_error;
242 int last_error;
243
244 u32 register_gen;
245 u64 notify_id;
246
247 rados_watchcb2_t wcb;
248 rados_watcherrcb_t errcb;
249 void *data;
250
251 struct page ***preply_pages;
252 size_t *preply_len;
253};
254
255struct ceph_watch_item {
256 struct ceph_entity_name name;
257 u64 cookie;
258 struct ceph_entity_addr addr;
259};
260
261#define CEPH_LINGER_ID_START 0xffff000000000000ULL
262
263struct ceph_osd_client {
264 struct ceph_client *client;
265
266 struct ceph_osdmap *osdmap; /* current map */
267 struct rw_semaphore lock;
268
269 struct rb_root osds; /* osds */
270 struct list_head osd_lru; /* idle osds */
271 spinlock_t osd_lru_lock;
272 struct ceph_osd homeless_osd;
273 atomic64_t last_tid; /* tid of last request */
274 u64 last_linger_id;
275 struct rb_root linger_requests; /* lingering requests */
276 struct rb_root map_checks;
277 struct rb_root linger_map_checks;
278 atomic_t num_requests;
279 atomic_t num_homeless;
280 struct delayed_work timeout_work;
281 struct delayed_work osds_timeout_work;
282#ifdef CONFIG_DEBUG_FS
283 struct dentry *debugfs_file;
284#endif
285
286 mempool_t *req_mempool;
287
288 struct ceph_msgpool msgpool_op;
289 struct ceph_msgpool msgpool_op_reply;
290
291 struct workqueue_struct *notify_wq;
292};
293
294static inline bool ceph_osdmap_flag(struct ceph_osd_client *osdc, int flag)
295{
296 return osdc->osdmap->flags & flag;
297}
298
299extern int ceph_osdc_setup(void);
300extern void ceph_osdc_cleanup(void);
301
302extern int ceph_osdc_init(struct ceph_osd_client *osdc,
303 struct ceph_client *client);
304extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
305
306extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
307 struct ceph_msg *msg);
308extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
309 struct ceph_msg *msg);
310
311extern void osd_req_op_init(struct ceph_osd_request *osd_req,
312 unsigned int which, u16 opcode, u32 flags);
313
314extern void osd_req_op_raw_data_in_pages(struct ceph_osd_request *,
315 unsigned int which,
316 struct page **pages, u64 length,
317 u32 alignment, bool pages_from_pool,
318 bool own_pages);
319
320extern void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
321 unsigned int which, u16 opcode,
322 u64 offset, u64 length,
323 u64 truncate_size, u32 truncate_seq);
324extern void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
325 unsigned int which, u64 length);
326extern void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
327 unsigned int which, u64 offset_inc);
328
329extern struct ceph_osd_data *osd_req_op_extent_osd_data(
330 struct ceph_osd_request *osd_req,
331 unsigned int which);
332
333extern void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *,
334 unsigned int which,
335 struct page **pages, u64 length,
336 u32 alignment, bool pages_from_pool,
337 bool own_pages);
338extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *,
339 unsigned int which,
340 struct ceph_pagelist *pagelist);
341#ifdef CONFIG_BLOCK
342extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *,
343 unsigned int which,
344 struct bio *bio, size_t bio_length);
345#endif /* CONFIG_BLOCK */
346
347extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request *,
348 unsigned int which,
349 struct ceph_pagelist *pagelist);
350extern void osd_req_op_cls_request_data_pages(struct ceph_osd_request *,
351 unsigned int which,
352 struct page **pages, u64 length,
353 u32 alignment, bool pages_from_pool,
354 bool own_pages);
355extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *,
356 unsigned int which,
357 struct page **pages, u64 length,
358 u32 alignment, bool pages_from_pool,
359 bool own_pages);
360extern void osd_req_op_cls_init(struct ceph_osd_request *osd_req,
361 unsigned int which, u16 opcode,
362 const char *class, const char *method);
363extern int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
364 u16 opcode, const char *name, const void *value,
365 size_t size, u8 cmp_op, u8 cmp_mode);
366extern void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
367 unsigned int which,
368 u64 expected_object_size,
369 u64 expected_write_size);
370
371extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
372 struct ceph_snap_context *snapc,
373 unsigned int num_ops,
374 bool use_mempool,
375 gfp_t gfp_flags);
376int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp);
377
378extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
379 struct ceph_file_layout *layout,
380 struct ceph_vino vino,
381 u64 offset, u64 *len,
382 unsigned int which, int num_ops,
383 int opcode, int flags,
384 struct ceph_snap_context *snapc,
385 u32 truncate_seq, u64 truncate_size,
386 bool use_mempool);
387
388extern void ceph_osdc_get_request(struct ceph_osd_request *req);
389extern void ceph_osdc_put_request(struct ceph_osd_request *req);
390
391extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
392 struct ceph_osd_request *req,
393 bool nofail);
394extern void ceph_osdc_cancel_request(struct ceph_osd_request *req);
395extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
396 struct ceph_osd_request *req);
397extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
398
399extern void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc);
400void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc);
401
402int ceph_osdc_call(struct ceph_osd_client *osdc,
403 struct ceph_object_id *oid,
404 struct ceph_object_locator *oloc,
405 const char *class, const char *method,
406 unsigned int flags,
407 struct page *req_page, size_t req_len,
408 struct page *resp_page, size_t *resp_len);
409
410extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
411 struct ceph_vino vino,
412 struct ceph_file_layout *layout,
413 u64 off, u64 *plen,
414 u32 truncate_seq, u64 truncate_size,
415 struct page **pages, int nr_pages,
416 int page_align);
417
418extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
419 struct ceph_vino vino,
420 struct ceph_file_layout *layout,
421 struct ceph_snap_context *sc,
422 u64 off, u64 len,
423 u32 truncate_seq, u64 truncate_size,
424 struct timespec *mtime,
425 struct page **pages, int nr_pages);
426
427/* watch/notify */
428struct ceph_osd_linger_request *
429ceph_osdc_watch(struct ceph_osd_client *osdc,
430 struct ceph_object_id *oid,
431 struct ceph_object_locator *oloc,
432 rados_watchcb2_t wcb,
433 rados_watcherrcb_t errcb,
434 void *data);
435int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
436 struct ceph_osd_linger_request *lreq);
437
438int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
439 struct ceph_object_id *oid,
440 struct ceph_object_locator *oloc,
441 u64 notify_id,
442 u64 cookie,
443 void *payload,
444 size_t payload_len);
445int ceph_osdc_notify(struct ceph_osd_client *osdc,
446 struct ceph_object_id *oid,
447 struct ceph_object_locator *oloc,
448 void *payload,
449 size_t payload_len,
450 u32 timeout,
451 struct page ***preply_pages,
452 size_t *preply_len);
453int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
454 struct ceph_osd_linger_request *lreq);
455int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
456 struct ceph_object_id *oid,
457 struct ceph_object_locator *oloc,
458 struct ceph_watch_item **watchers,
459 u32 *num_watchers);
460#endif
461