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