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/auth.h>
13#include <linux/ceph/pagelist.h>
14
15struct ceph_msg;
16struct ceph_snap_context;
17struct ceph_osd_request;
18struct ceph_osd_client;
19
20/*
21 * completion callback for async writepages
22 */
23typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *);
24typedef void (*ceph_osdc_unsafe_callback_t)(struct ceph_osd_request *, bool);
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 u64 expected_object_size;
124 u64 expected_write_size;
125 } alloc_hint;
126 };
127};
128
129struct ceph_osd_request_target {
130 struct ceph_object_id base_oid;
131 struct ceph_object_locator base_oloc;
132 struct ceph_object_id target_oid;
133 struct ceph_object_locator target_oloc;
134
135 struct ceph_pg pgid;
136 u32 pg_num;
137 u32 pg_num_mask;
138 struct ceph_osds acting;
139 struct ceph_osds up;
140 int size;
141 int min_size;
142 bool sort_bitwise;
143
144 unsigned int flags; /* CEPH_OSD_FLAG_* */
145 bool paused;
146
147 int osd;
148};
149
150/* an in-flight request */
151struct ceph_osd_request {
152 u64 r_tid; /* unique for this client */
153 struct rb_node r_node;
154 struct rb_node r_mc_node; /* map check */
155 struct ceph_osd *r_osd;
156
157 struct ceph_osd_request_target r_t;
158#define r_base_oid r_t.base_oid
159#define r_base_oloc r_t.base_oloc
160#define r_flags r_t.flags
161
162 struct ceph_msg *r_request, *r_reply;
163 u32 r_sent; /* >0 if r_request is sending/sent */
164
165 /* request osd ops array */
166 unsigned int r_num_ops;
167
168 int r_result;
169 bool r_got_reply;
170
171 struct ceph_osd_client *r_osdc;
172 struct kref r_kref;
173 bool r_mempool;
174 struct completion r_completion;
175 struct completion r_safe_completion; /* fsync waiter */
176 ceph_osdc_callback_t r_callback;
177 ceph_osdc_unsafe_callback_t r_unsafe_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 int r_attempts;
193 struct ceph_eversion r_replay_version; /* aka reassert_version */
194 u32 r_last_force_resend;
195 u32 r_map_dne_bound;
196
197 struct ceph_osd_req_op r_ops[];
198};
199
200struct ceph_request_redirect {
201 struct ceph_object_locator oloc;
202};
203
204typedef void (*rados_watchcb2_t)(void *arg, u64 notify_id, u64 cookie,
205 u64 notifier_id, void *data, size_t data_len);
206typedef void (*rados_watcherrcb_t)(void *arg, u64 cookie, int err);
207
208struct ceph_osd_linger_request {
209 struct ceph_osd_client *osdc;
210 u64 linger_id;
211 bool committed;
212 bool is_watch; /* watch or notify */
213
214 struct ceph_osd *osd;
215 struct ceph_osd_request *reg_req;
216 struct ceph_osd_request *ping_req;
217 unsigned long ping_sent;
218 unsigned long watch_valid_thru;
219 struct list_head pending_lworks;
220
221 struct ceph_osd_request_target t;
222 u32 last_force_resend;
223 u32 map_dne_bound;
224
225 struct timespec mtime;
226
227 struct kref kref;
228 struct mutex lock;
229 struct rb_node node; /* osd */
230 struct rb_node osdc_node; /* osdc */
231 struct rb_node mc_node; /* map check */
232 struct list_head scan_item;
233
234 struct completion reg_commit_wait;
235 struct completion notify_finish_wait;
236 int reg_commit_error;
237 int notify_finish_error;
238 int last_error;
239
240 u32 register_gen;
241 u64 notify_id;
242
243 rados_watchcb2_t wcb;
244 rados_watcherrcb_t errcb;
245 void *data;
246
247 struct page ***preply_pages;
248 size_t *preply_len;
249};
250
251struct ceph_osd_client {
252 struct ceph_client *client;
253
254 struct ceph_osdmap *osdmap; /* current map */
255 struct rw_semaphore lock;
256
257 struct rb_root osds; /* osds */
258 struct list_head osd_lru; /* idle osds */
259 spinlock_t osd_lru_lock;
260 struct ceph_osd homeless_osd;
261 atomic64_t last_tid; /* tid of last request */
262 u64 last_linger_id;
263 struct rb_root linger_requests; /* lingering requests */
264 struct rb_root map_checks;
265 struct rb_root linger_map_checks;
266 atomic_t num_requests;
267 atomic_t num_homeless;
268 struct delayed_work timeout_work;
269 struct delayed_work osds_timeout_work;
270#ifdef CONFIG_DEBUG_FS
271 struct dentry *debugfs_file;
272#endif
273
274 mempool_t *req_mempool;
275
276 struct ceph_msgpool msgpool_op;
277 struct ceph_msgpool msgpool_op_reply;
278
279 struct workqueue_struct *notify_wq;
280};
281
282static inline bool ceph_osdmap_flag(struct ceph_osd_client *osdc, int flag)
283{
284 return osdc->osdmap->flags & flag;
285}
286
287extern int ceph_osdc_setup(void);
288extern void ceph_osdc_cleanup(void);
289
290extern int ceph_osdc_init(struct ceph_osd_client *osdc,
291 struct ceph_client *client);
292extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
293
294extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
295 struct ceph_msg *msg);
296extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
297 struct ceph_msg *msg);
298
299extern void osd_req_op_init(struct ceph_osd_request *osd_req,
300 unsigned int which, u16 opcode, u32 flags);
301
302extern void osd_req_op_raw_data_in_pages(struct ceph_osd_request *,
303 unsigned int which,
304 struct page **pages, u64 length,
305 u32 alignment, bool pages_from_pool,
306 bool own_pages);
307
308extern void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
309 unsigned int which, u16 opcode,
310 u64 offset, u64 length,
311 u64 truncate_size, u32 truncate_seq);
312extern void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
313 unsigned int which, u64 length);
314extern void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
315 unsigned int which, u64 offset_inc);
316
317extern struct ceph_osd_data *osd_req_op_extent_osd_data(
318 struct ceph_osd_request *osd_req,
319 unsigned int which);
320
321extern void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *,
322 unsigned int which,
323 struct page **pages, u64 length,
324 u32 alignment, bool pages_from_pool,
325 bool own_pages);
326extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *,
327 unsigned int which,
328 struct ceph_pagelist *pagelist);
329#ifdef CONFIG_BLOCK
330extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *,
331 unsigned int which,
332 struct bio *bio, size_t bio_length);
333#endif /* CONFIG_BLOCK */
334
335extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request *,
336 unsigned int which,
337 struct ceph_pagelist *pagelist);
338extern void osd_req_op_cls_request_data_pages(struct ceph_osd_request *,
339 unsigned int which,
340 struct page **pages, u64 length,
341 u32 alignment, bool pages_from_pool,
342 bool own_pages);
343extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *,
344 unsigned int which,
345 struct page **pages, u64 length,
346 u32 alignment, bool pages_from_pool,
347 bool own_pages);
348
349extern void osd_req_op_cls_init(struct ceph_osd_request *osd_req,
350 unsigned int which, u16 opcode,
351 const char *class, const char *method);
352extern int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
353 u16 opcode, const char *name, const void *value,
354 size_t size, u8 cmp_op, u8 cmp_mode);
355extern void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
356 unsigned int which,
357 u64 expected_object_size,
358 u64 expected_write_size);
359
360extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
361 struct ceph_snap_context *snapc,
362 unsigned int num_ops,
363 bool use_mempool,
364 gfp_t gfp_flags);
365int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp);
366
367extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
368 struct ceph_file_layout *layout,
369 struct ceph_vino vino,
370 u64 offset, u64 *len,
371 unsigned int which, int num_ops,
372 int opcode, int flags,
373 struct ceph_snap_context *snapc,
374 u32 truncate_seq, u64 truncate_size,
375 bool use_mempool);
376
377extern void ceph_osdc_get_request(struct ceph_osd_request *req);
378extern void ceph_osdc_put_request(struct ceph_osd_request *req);
379
380extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
381 struct ceph_osd_request *req,
382 bool nofail);
383extern void ceph_osdc_cancel_request(struct ceph_osd_request *req);
384extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
385 struct ceph_osd_request *req);
386extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
387
388extern void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc);
389void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc);
390
391extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
392 struct ceph_vino vino,
393 struct ceph_file_layout *layout,
394 u64 off, u64 *plen,
395 u32 truncate_seq, u64 truncate_size,
396 struct page **pages, int nr_pages,
397 int page_align);
398
399extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
400 struct ceph_vino vino,
401 struct ceph_file_layout *layout,
402 struct ceph_snap_context *sc,
403 u64 off, u64 len,
404 u32 truncate_seq, u64 truncate_size,
405 struct timespec *mtime,
406 struct page **pages, int nr_pages);
407
408/* watch/notify */
409struct ceph_osd_linger_request *
410ceph_osdc_watch(struct ceph_osd_client *osdc,
411 struct ceph_object_id *oid,
412 struct ceph_object_locator *oloc,
413 rados_watchcb2_t wcb,
414 rados_watcherrcb_t errcb,
415 void *data);
416int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
417 struct ceph_osd_linger_request *lreq);
418
419int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
420 struct ceph_object_id *oid,
421 struct ceph_object_locator *oloc,
422 u64 notify_id,
423 u64 cookie,
424 void *payload,
425 size_t payload_len);
426int ceph_osdc_notify(struct ceph_osd_client *osdc,
427 struct ceph_object_id *oid,
428 struct ceph_object_locator *oloc,
429 void *payload,
430 size_t payload_len,
431 u32 timeout,
432 struct page ***preply_pages,
433 size_t *preply_len);
434int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
435 struct ceph_osd_linger_request *lreq);
436#endif
437