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 u64 expected_object_size;
125 u64 expected_write_size;
126 } alloc_hint;
127 };
128};
129
130struct ceph_osd_request_target {
131 struct ceph_object_id base_oid;
132 struct ceph_object_locator base_oloc;
133 struct ceph_object_id target_oid;
134 struct ceph_object_locator target_oloc;
135
136 struct ceph_pg pgid;
137 u32 pg_num;
138 u32 pg_num_mask;
139 struct ceph_osds acting;
140 struct ceph_osds up;
141 int size;
142 int min_size;
143 bool sort_bitwise;
144
145 unsigned int flags; /* CEPH_OSD_FLAG_* */
146 bool paused;
147
148 int osd;
149};
150
151/* an in-flight request */
152struct ceph_osd_request {
153 u64 r_tid; /* unique for this client */
154 struct rb_node r_node;
155 struct rb_node r_mc_node; /* map check */
156 struct ceph_osd *r_osd;
157
158 struct ceph_osd_request_target r_t;
159#define r_base_oid r_t.base_oid
160#define r_base_oloc r_t.base_oloc
161#define r_flags r_t.flags
162
163 struct ceph_msg *r_request, *r_reply;
164 u32 r_sent; /* >0 if r_request is sending/sent */
165
166 /* request osd ops array */
167 unsigned int r_num_ops;
168
169 int r_result;
170 bool r_got_reply;
171
172 struct ceph_osd_client *r_osdc;
173 struct kref r_kref;
174 bool r_mempool;
175 struct completion r_completion;
176 struct completion r_safe_completion; /* fsync waiter */
177 ceph_osdc_callback_t r_callback;
178 ceph_osdc_unsafe_callback_t r_unsafe_callback;
179 struct list_head r_unsafe_item;
180
181 struct inode *r_inode; /* for use by callbacks */
182 void *r_priv; /* ditto */
183
184 /* set by submitter */
185 u64 r_snapid; /* for reads, CEPH_NOSNAP o/w */
186 struct ceph_snap_context *r_snapc; /* for writes */
187 struct timespec r_mtime; /* ditto */
188 u64 r_data_offset; /* ditto */
189 bool r_linger; /* don't resend on failure */
190
191 /* internal */
192 unsigned long r_stamp; /* jiffies, send or check time */
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_osd_client {
253 struct ceph_client *client;
254
255 struct ceph_osdmap *osdmap; /* current map */
256 struct rw_semaphore lock;
257
258 struct rb_root osds; /* osds */
259 struct list_head osd_lru; /* idle osds */
260 spinlock_t osd_lru_lock;
261 struct ceph_osd homeless_osd;
262 atomic64_t last_tid; /* tid of last request */
263 u64 last_linger_id;
264 struct rb_root linger_requests; /* lingering requests */
265 struct rb_root map_checks;
266 struct rb_root linger_map_checks;
267 atomic_t num_requests;
268 atomic_t num_homeless;
269 struct delayed_work timeout_work;
270 struct delayed_work osds_timeout_work;
271#ifdef CONFIG_DEBUG_FS
272 struct dentry *debugfs_file;
273#endif
274
275 mempool_t *req_mempool;
276
277 struct ceph_msgpool msgpool_op;
278 struct ceph_msgpool msgpool_op_reply;
279
280 struct workqueue_struct *notify_wq;
281};
282
283static inline bool ceph_osdmap_flag(struct ceph_osd_client *osdc, int flag)
284{
285 return osdc->osdmap->flags & flag;
286}
287
288extern int ceph_osdc_setup(void);
289extern void ceph_osdc_cleanup(void);
290
291extern int ceph_osdc_init(struct ceph_osd_client *osdc,
292 struct ceph_client *client);
293extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
294
295extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
296 struct ceph_msg *msg);
297extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
298 struct ceph_msg *msg);
299
300extern void osd_req_op_init(struct ceph_osd_request *osd_req,
301 unsigned int which, u16 opcode, u32 flags);
302
303extern void osd_req_op_raw_data_in_pages(struct ceph_osd_request *,
304 unsigned int which,
305 struct page **pages, u64 length,
306 u32 alignment, bool pages_from_pool,
307 bool own_pages);
308
309extern void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
310 unsigned int which, u16 opcode,
311 u64 offset, u64 length,
312 u64 truncate_size, u32 truncate_seq);
313extern void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
314 unsigned int which, u64 length);
315extern void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
316 unsigned int which, u64 offset_inc);
317
318extern struct ceph_osd_data *osd_req_op_extent_osd_data(
319 struct ceph_osd_request *osd_req,
320 unsigned int which);
321
322extern void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *,
323 unsigned int which,
324 struct page **pages, u64 length,
325 u32 alignment, bool pages_from_pool,
326 bool own_pages);
327extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *,
328 unsigned int which,
329 struct ceph_pagelist *pagelist);
330#ifdef CONFIG_BLOCK
331extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *,
332 unsigned int which,
333 struct bio *bio, size_t bio_length);
334#endif /* CONFIG_BLOCK */
335
336extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request *,
337 unsigned int which,
338 struct ceph_pagelist *pagelist);
339extern void osd_req_op_cls_request_data_pages(struct ceph_osd_request *,
340 unsigned int which,
341 struct page **pages, u64 length,
342 u32 alignment, bool pages_from_pool,
343 bool own_pages);
344extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *,
345 unsigned int which,
346 struct page **pages, u64 length,
347 u32 alignment, bool pages_from_pool,
348 bool own_pages);
349
350extern void osd_req_op_cls_init(struct ceph_osd_request *osd_req,
351 unsigned int which, u16 opcode,
352 const char *class, const char *method);
353extern int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
354 u16 opcode, const char *name, const void *value,
355 size_t size, u8 cmp_op, u8 cmp_mode);
356extern void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
357 unsigned int which,
358 u64 expected_object_size,
359 u64 expected_write_size);
360
361extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
362 struct ceph_snap_context *snapc,
363 unsigned int num_ops,
364 bool use_mempool,
365 gfp_t gfp_flags);
366int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp);
367
368extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
369 struct ceph_file_layout *layout,
370 struct ceph_vino vino,
371 u64 offset, u64 *len,
372 unsigned int which, int num_ops,
373 int opcode, int flags,
374 struct ceph_snap_context *snapc,
375 u32 truncate_seq, u64 truncate_size,
376 bool use_mempool);
377
378extern void ceph_osdc_get_request(struct ceph_osd_request *req);
379extern void ceph_osdc_put_request(struct ceph_osd_request *req);
380
381extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
382 struct ceph_osd_request *req,
383 bool nofail);
384extern void ceph_osdc_cancel_request(struct ceph_osd_request *req);
385extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
386 struct ceph_osd_request *req);
387extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
388
389extern void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc);
390void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc);
391
392extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
393 struct ceph_vino vino,
394 struct ceph_file_layout *layout,
395 u64 off, u64 *plen,
396 u32 truncate_seq, u64 truncate_size,
397 struct page **pages, int nr_pages,
398 int page_align);
399
400extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
401 struct ceph_vino vino,
402 struct ceph_file_layout *layout,
403 struct ceph_snap_context *sc,
404 u64 off, u64 len,
405 u32 truncate_seq, u64 truncate_size,
406 struct timespec *mtime,
407 struct page **pages, int nr_pages);
408
409/* watch/notify */
410struct ceph_osd_linger_request *
411ceph_osdc_watch(struct ceph_osd_client *osdc,
412 struct ceph_object_id *oid,
413 struct ceph_object_locator *oloc,
414 rados_watchcb2_t wcb,
415 rados_watcherrcb_t errcb,
416 void *data);
417int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
418 struct ceph_osd_linger_request *lreq);
419
420int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
421 struct ceph_object_id *oid,
422 struct ceph_object_locator *oloc,
423 u64 notify_id,
424 u64 cookie,
425 void *payload,
426 size_t payload_len);
427int ceph_osdc_notify(struct ceph_osd_client *osdc,
428 struct ceph_object_id *oid,
429 struct ceph_object_locator *oloc,
430 void *payload,
431 size_t payload_len,
432 u32 timeout,
433 struct page ***preply_pages,
434 size_t *preply_len);
435int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
436 struct ceph_osd_linger_request *lreq);
437#endif
438