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f24e9980 SW |
1 | #include "ceph_debug.h" |
2 | ||
3 | #include <linux/err.h> | |
4 | #include <linux/highmem.h> | |
5 | #include <linux/mm.h> | |
6 | #include <linux/pagemap.h> | |
7 | #include <linux/slab.h> | |
8 | #include <linux/uaccess.h> | |
68b4476b YS |
9 | #ifdef CONFIG_BLOCK |
10 | #include <linux/bio.h> | |
11 | #endif | |
f24e9980 SW |
12 | |
13 | #include "super.h" | |
14 | #include "osd_client.h" | |
15 | #include "messenger.h" | |
16 | #include "decode.h" | |
4e7a5dcd | 17 | #include "auth.h" |
68b4476b | 18 | #include "pagelist.h" |
f24e9980 | 19 | |
c16e7869 SW |
20 | #define OSD_OP_FRONT_LEN 4096 |
21 | #define OSD_OPREPLY_FRONT_LEN 512 | |
0d59ab81 | 22 | |
9e32789f | 23 | static const struct ceph_connection_operations osd_con_ops; |
422d2cb8 YS |
24 | static int __kick_requests(struct ceph_osd_client *osdc, |
25 | struct ceph_osd *kickosd); | |
f24e9980 SW |
26 | |
27 | static void kick_requests(struct ceph_osd_client *osdc, struct ceph_osd *osd); | |
28 | ||
68b4476b YS |
29 | static int op_needs_trail(int op) |
30 | { | |
31 | switch (op) { | |
32 | case CEPH_OSD_OP_GETXATTR: | |
33 | case CEPH_OSD_OP_SETXATTR: | |
34 | case CEPH_OSD_OP_CMPXATTR: | |
35 | case CEPH_OSD_OP_CALL: | |
36 | return 1; | |
37 | default: | |
38 | return 0; | |
39 | } | |
40 | } | |
41 | ||
42 | static int op_has_extent(int op) | |
43 | { | |
44 | return (op == CEPH_OSD_OP_READ || | |
45 | op == CEPH_OSD_OP_WRITE); | |
46 | } | |
47 | ||
3499e8a5 YS |
48 | void ceph_calc_raw_layout(struct ceph_osd_client *osdc, |
49 | struct ceph_file_layout *layout, | |
50 | u64 snapid, | |
68b4476b YS |
51 | u64 off, u64 *plen, u64 *bno, |
52 | struct ceph_osd_request *req, | |
53 | struct ceph_osd_req_op *op) | |
3499e8a5 YS |
54 | { |
55 | struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base; | |
68b4476b | 56 | u64 orig_len = *plen; |
3499e8a5 YS |
57 | u64 objoff, objlen; /* extent in object */ |
58 | ||
59 | reqhead->snapid = cpu_to_le64(snapid); | |
60 | ||
61 | /* object extent? */ | |
68b4476b | 62 | ceph_calc_file_object_mapping(layout, off, plen, bno, |
3499e8a5 | 63 | &objoff, &objlen); |
68b4476b | 64 | if (*plen < orig_len) |
3499e8a5 | 65 | dout(" skipping last %llu, final file extent %llu~%llu\n", |
68b4476b | 66 | orig_len - *plen, off, *plen); |
3499e8a5 | 67 | |
68b4476b YS |
68 | if (op_has_extent(op->op)) { |
69 | op->extent.offset = objoff; | |
70 | op->extent.length = objlen; | |
71 | } | |
72 | req->r_num_pages = calc_pages_for(off, *plen); | |
3499e8a5 YS |
73 | |
74 | dout("calc_layout bno=%llx %llu~%llu (%d pages)\n", | |
75 | *bno, objoff, objlen, req->r_num_pages); | |
76 | ||
77 | } | |
78 | ||
f24e9980 SW |
79 | /* |
80 | * Implement client access to distributed object storage cluster. | |
81 | * | |
82 | * All data objects are stored within a cluster/cloud of OSDs, or | |
83 | * "object storage devices." (Note that Ceph OSDs have _nothing_ to | |
84 | * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply | |
85 | * remote daemons serving up and coordinating consistent and safe | |
86 | * access to storage. | |
87 | * | |
88 | * Cluster membership and the mapping of data objects onto storage devices | |
89 | * are described by the osd map. | |
90 | * | |
91 | * We keep track of pending OSD requests (read, write), resubmit | |
92 | * requests to different OSDs when the cluster topology/data layout | |
93 | * change, or retry the affected requests when the communications | |
94 | * channel with an OSD is reset. | |
95 | */ | |
96 | ||
97 | /* | |
98 | * calculate the mapping of a file extent onto an object, and fill out the | |
99 | * request accordingly. shorten extent as necessary if it crosses an | |
100 | * object boundary. | |
101 | * | |
102 | * fill osd op in request message. | |
103 | */ | |
104 | static void calc_layout(struct ceph_osd_client *osdc, | |
3499e8a5 YS |
105 | struct ceph_vino vino, |
106 | struct ceph_file_layout *layout, | |
f24e9980 | 107 | u64 off, u64 *plen, |
68b4476b YS |
108 | struct ceph_osd_request *req, |
109 | struct ceph_osd_req_op *op) | |
f24e9980 | 110 | { |
f24e9980 SW |
111 | u64 bno; |
112 | ||
68b4476b YS |
113 | ceph_calc_raw_layout(osdc, layout, vino.snap, off, |
114 | plen, &bno, req, op); | |
f24e9980 SW |
115 | |
116 | sprintf(req->r_oid, "%llx.%08llx", vino.ino, bno); | |
117 | req->r_oid_len = strlen(req->r_oid); | |
f24e9980 SW |
118 | } |
119 | ||
f24e9980 SW |
120 | /* |
121 | * requests | |
122 | */ | |
415e49a9 | 123 | void ceph_osdc_release_request(struct kref *kref) |
f24e9980 | 124 | { |
415e49a9 SW |
125 | struct ceph_osd_request *req = container_of(kref, |
126 | struct ceph_osd_request, | |
127 | r_kref); | |
128 | ||
129 | if (req->r_request) | |
130 | ceph_msg_put(req->r_request); | |
131 | if (req->r_reply) | |
132 | ceph_msg_put(req->r_reply); | |
0d59ab81 | 133 | if (req->r_con_filling_msg) { |
350b1c32 | 134 | dout("release_request revoking pages %p from con %p\n", |
0d59ab81 YS |
135 | req->r_pages, req->r_con_filling_msg); |
136 | ceph_con_revoke_message(req->r_con_filling_msg, | |
137 | req->r_reply); | |
138 | ceph_con_put(req->r_con_filling_msg); | |
350b1c32 | 139 | } |
415e49a9 SW |
140 | if (req->r_own_pages) |
141 | ceph_release_page_vector(req->r_pages, | |
142 | req->r_num_pages); | |
68b4476b YS |
143 | #ifdef CONFIG_BLOCK |
144 | if (req->r_bio) | |
145 | bio_put(req->r_bio); | |
146 | #endif | |
415e49a9 | 147 | ceph_put_snap_context(req->r_snapc); |
68b4476b YS |
148 | if (req->r_trail) { |
149 | ceph_pagelist_release(req->r_trail); | |
150 | kfree(req->r_trail); | |
151 | } | |
415e49a9 SW |
152 | if (req->r_mempool) |
153 | mempool_free(req, req->r_osdc->req_mempool); | |
154 | else | |
155 | kfree(req); | |
f24e9980 SW |
156 | } |
157 | ||
68b4476b YS |
158 | static int op_needs_trail(int op) |
159 | { | |
160 | switch (op) { | |
161 | case CEPH_OSD_OP_GETXATTR: | |
162 | case CEPH_OSD_OP_SETXATTR: | |
163 | case CEPH_OSD_OP_CMPXATTR: | |
164 | return 1; | |
165 | default: | |
166 | return 0; | |
167 | } | |
168 | } | |
169 | ||
170 | static int get_num_ops(struct ceph_osd_req_op *ops, int *needs_trail) | |
171 | { | |
172 | int i = 0; | |
173 | ||
174 | if (needs_trail) | |
175 | *needs_trail = 0; | |
176 | while (ops[i].op) { | |
177 | if (needs_trail && op_needs_trail(ops[i].op)) | |
178 | *needs_trail = 1; | |
179 | i++; | |
180 | } | |
181 | ||
182 | return i; | |
183 | } | |
184 | ||
3499e8a5 YS |
185 | struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, |
186 | int flags, | |
f24e9980 | 187 | struct ceph_snap_context *snapc, |
68b4476b | 188 | struct ceph_osd_req_op *ops, |
3499e8a5 YS |
189 | bool use_mempool, |
190 | gfp_t gfp_flags, | |
68b4476b YS |
191 | struct page **pages, |
192 | struct bio *bio) | |
f24e9980 SW |
193 | { |
194 | struct ceph_osd_request *req; | |
195 | struct ceph_msg *msg; | |
68b4476b YS |
196 | int needs_trail; |
197 | int num_op = get_num_ops(ops, &needs_trail); | |
198 | size_t msg_size = sizeof(struct ceph_osd_request_head); | |
3499e8a5 | 199 | |
68b4476b | 200 | msg_size += num_op*sizeof(struct ceph_osd_op); |
f24e9980 SW |
201 | |
202 | if (use_mempool) { | |
3499e8a5 | 203 | req = mempool_alloc(osdc->req_mempool, gfp_flags); |
f24e9980 SW |
204 | memset(req, 0, sizeof(*req)); |
205 | } else { | |
3499e8a5 | 206 | req = kzalloc(sizeof(*req), gfp_flags); |
f24e9980 SW |
207 | } |
208 | if (req == NULL) | |
a79832f2 | 209 | return NULL; |
f24e9980 | 210 | |
f24e9980 SW |
211 | req->r_osdc = osdc; |
212 | req->r_mempool = use_mempool; | |
68b4476b | 213 | |
415e49a9 | 214 | kref_init(&req->r_kref); |
f24e9980 SW |
215 | init_completion(&req->r_completion); |
216 | init_completion(&req->r_safe_completion); | |
217 | INIT_LIST_HEAD(&req->r_unsafe_item); | |
218 | req->r_flags = flags; | |
219 | ||
220 | WARN_ON((flags & (CEPH_OSD_FLAG_READ|CEPH_OSD_FLAG_WRITE)) == 0); | |
221 | ||
c16e7869 SW |
222 | /* create reply message */ |
223 | if (use_mempool) | |
224 | msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); | |
225 | else | |
226 | msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, | |
3499e8a5 | 227 | OSD_OPREPLY_FRONT_LEN, gfp_flags); |
a79832f2 | 228 | if (!msg) { |
c16e7869 | 229 | ceph_osdc_put_request(req); |
a79832f2 | 230 | return NULL; |
c16e7869 SW |
231 | } |
232 | req->r_reply = msg; | |
233 | ||
68b4476b YS |
234 | /* allocate space for the trailing data */ |
235 | if (needs_trail) { | |
236 | req->r_trail = kmalloc(sizeof(struct ceph_pagelist), gfp_flags); | |
237 | if (!req->r_trail) { | |
238 | ceph_osdc_put_request(req); | |
239 | return NULL; | |
240 | } | |
241 | ceph_pagelist_init(req->r_trail); | |
242 | } | |
c16e7869 | 243 | /* create request message; allow space for oid */ |
f24e9980 SW |
244 | msg_size += 40; |
245 | if (snapc) | |
246 | msg_size += sizeof(u64) * snapc->num_snaps; | |
247 | if (use_mempool) | |
8f3bc053 | 248 | msg = ceph_msgpool_get(&osdc->msgpool_op, 0); |
f24e9980 | 249 | else |
3499e8a5 | 250 | msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags); |
a79832f2 | 251 | if (!msg) { |
f24e9980 | 252 | ceph_osdc_put_request(req); |
a79832f2 | 253 | return NULL; |
f24e9980 | 254 | } |
68b4476b | 255 | |
f24e9980 SW |
256 | msg->hdr.type = cpu_to_le16(CEPH_MSG_OSD_OP); |
257 | memset(msg->front.iov_base, 0, msg->front.iov_len); | |
3499e8a5 YS |
258 | |
259 | req->r_request = msg; | |
260 | req->r_pages = pages; | |
68b4476b YS |
261 | #ifdef CONFIG_BLOCK |
262 | if (bio) { | |
263 | req->r_bio = bio; | |
264 | bio_get(req->r_bio); | |
265 | } | |
266 | #endif | |
3499e8a5 YS |
267 | |
268 | return req; | |
269 | } | |
270 | ||
68b4476b YS |
271 | static void osd_req_encode_op(struct ceph_osd_request *req, |
272 | struct ceph_osd_op *dst, | |
273 | struct ceph_osd_req_op *src) | |
274 | { | |
275 | dst->op = cpu_to_le16(src->op); | |
276 | ||
277 | switch (dst->op) { | |
278 | case CEPH_OSD_OP_READ: | |
279 | case CEPH_OSD_OP_WRITE: | |
280 | dst->extent.offset = | |
281 | cpu_to_le64(src->extent.offset); | |
282 | dst->extent.length = | |
283 | cpu_to_le64(src->extent.length); | |
284 | dst->extent.truncate_size = | |
285 | cpu_to_le64(src->extent.truncate_size); | |
286 | dst->extent.truncate_seq = | |
287 | cpu_to_le32(src->extent.truncate_seq); | |
288 | break; | |
289 | ||
290 | case CEPH_OSD_OP_GETXATTR: | |
291 | case CEPH_OSD_OP_SETXATTR: | |
292 | case CEPH_OSD_OP_CMPXATTR: | |
293 | BUG_ON(!req->r_trail); | |
294 | ||
295 | dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); | |
296 | dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); | |
297 | dst->xattr.cmp_op = src->xattr.cmp_op; | |
298 | dst->xattr.cmp_mode = src->xattr.cmp_mode; | |
299 | ceph_pagelist_append(req->r_trail, src->xattr.name, | |
300 | src->xattr.name_len); | |
301 | ceph_pagelist_append(req->r_trail, src->xattr.val, | |
302 | src->xattr.value_len); | |
303 | break; | |
304 | case CEPH_OSD_OP_STARTSYNC: | |
305 | break; | |
306 | default: | |
307 | pr_err("unrecognized osd opcode %d\n", dst->op); | |
308 | WARN_ON(1); | |
309 | break; | |
310 | } | |
311 | dst->payload_len = cpu_to_le32(src->payload_len); | |
312 | } | |
313 | ||
3499e8a5 YS |
314 | /* |
315 | * build new request AND message | |
316 | * | |
317 | */ | |
318 | void ceph_osdc_build_request(struct ceph_osd_request *req, | |
68b4476b YS |
319 | u64 off, u64 *plen, |
320 | struct ceph_osd_req_op *src_ops, | |
321 | struct ceph_snap_context *snapc, | |
322 | struct timespec *mtime, | |
323 | const char *oid, | |
324 | int oid_len) | |
3499e8a5 YS |
325 | { |
326 | struct ceph_msg *msg = req->r_request; | |
327 | struct ceph_osd_request_head *head; | |
68b4476b | 328 | struct ceph_osd_req_op *src_op; |
3499e8a5 YS |
329 | struct ceph_osd_op *op; |
330 | void *p; | |
68b4476b | 331 | int num_op = get_num_ops(src_ops, NULL); |
3499e8a5 | 332 | size_t msg_size = sizeof(*head) + num_op*sizeof(*op); |
3499e8a5 | 333 | int flags = req->r_flags; |
68b4476b YS |
334 | u64 data_len = 0; |
335 | int i; | |
3499e8a5 | 336 | |
f24e9980 SW |
337 | head = msg->front.iov_base; |
338 | op = (void *)(head + 1); | |
339 | p = (void *)(op + num_op); | |
340 | ||
f24e9980 SW |
341 | req->r_snapc = ceph_get_snap_context(snapc); |
342 | ||
343 | head->client_inc = cpu_to_le32(1); /* always, for now. */ | |
344 | head->flags = cpu_to_le32(flags); | |
345 | if (flags & CEPH_OSD_FLAG_WRITE) | |
346 | ceph_encode_timespec(&head->mtime, mtime); | |
347 | head->num_ops = cpu_to_le16(num_op); | |
f24e9980 | 348 | |
f24e9980 SW |
349 | |
350 | /* fill in oid */ | |
3499e8a5 YS |
351 | head->object_len = cpu_to_le32(oid_len); |
352 | memcpy(p, oid, oid_len); | |
353 | p += oid_len; | |
f24e9980 | 354 | |
68b4476b YS |
355 | src_op = src_ops; |
356 | while (src_op->op) { | |
357 | osd_req_encode_op(req, op, src_op); | |
358 | src_op++; | |
f24e9980 | 359 | op++; |
f24e9980 | 360 | } |
68b4476b YS |
361 | |
362 | if (req->r_trail) | |
363 | data_len += req->r_trail->length; | |
364 | ||
f24e9980 SW |
365 | if (snapc) { |
366 | head->snap_seq = cpu_to_le64(snapc->seq); | |
367 | head->num_snaps = cpu_to_le32(snapc->num_snaps); | |
368 | for (i = 0; i < snapc->num_snaps; i++) { | |
369 | put_unaligned_le64(snapc->snaps[i], p); | |
370 | p += sizeof(u64); | |
371 | } | |
372 | } | |
373 | ||
68b4476b YS |
374 | if (flags & CEPH_OSD_FLAG_WRITE) { |
375 | req->r_request->hdr.data_off = cpu_to_le16(off); | |
376 | req->r_request->hdr.data_len = cpu_to_le32(*plen + data_len); | |
377 | } else if (data_len) { | |
378 | req->r_request->hdr.data_off = 0; | |
379 | req->r_request->hdr.data_len = cpu_to_le32(data_len); | |
380 | } | |
381 | ||
f24e9980 | 382 | BUG_ON(p > msg->front.iov_base + msg->front.iov_len); |
6f863e71 SW |
383 | msg_size = p - msg->front.iov_base; |
384 | msg->front.iov_len = msg_size; | |
385 | msg->hdr.front_len = cpu_to_le32(msg_size); | |
3499e8a5 YS |
386 | return; |
387 | } | |
388 | ||
389 | /* | |
390 | * build new request AND message, calculate layout, and adjust file | |
391 | * extent as needed. | |
392 | * | |
393 | * if the file was recently truncated, we include information about its | |
394 | * old and new size so that the object can be updated appropriately. (we | |
395 | * avoid synchronously deleting truncated objects because it's slow.) | |
396 | * | |
397 | * if @do_sync, include a 'startsync' command so that the osd will flush | |
398 | * data quickly. | |
399 | */ | |
400 | struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, | |
401 | struct ceph_file_layout *layout, | |
402 | struct ceph_vino vino, | |
403 | u64 off, u64 *plen, | |
404 | int opcode, int flags, | |
405 | struct ceph_snap_context *snapc, | |
406 | int do_sync, | |
407 | u32 truncate_seq, | |
408 | u64 truncate_size, | |
409 | struct timespec *mtime, | |
410 | bool use_mempool, int num_reply) | |
411 | { | |
68b4476b YS |
412 | struct ceph_osd_req_op ops[3]; |
413 | struct ceph_osd_request *req; | |
414 | ||
415 | ops[0].op = opcode; | |
416 | ops[0].extent.truncate_seq = truncate_seq; | |
417 | ops[0].extent.truncate_size = truncate_size; | |
418 | ops[0].payload_len = 0; | |
419 | ||
420 | if (do_sync) { | |
421 | ops[1].op = CEPH_OSD_OP_STARTSYNC; | |
422 | ops[1].payload_len = 0; | |
423 | ops[2].op = 0; | |
424 | } else | |
425 | ops[1].op = 0; | |
426 | ||
427 | req = ceph_osdc_alloc_request(osdc, flags, | |
428 | snapc, ops, | |
3499e8a5 | 429 | use_mempool, |
68b4476b | 430 | GFP_NOFS, NULL, NULL); |
3499e8a5 YS |
431 | if (IS_ERR(req)) |
432 | return req; | |
433 | ||
434 | /* calculate max write size */ | |
68b4476b | 435 | calc_layout(osdc, vino, layout, off, plen, req, ops); |
3499e8a5 YS |
436 | req->r_file_layout = *layout; /* keep a copy */ |
437 | ||
68b4476b YS |
438 | ceph_osdc_build_request(req, off, plen, ops, |
439 | snapc, | |
3499e8a5 YS |
440 | mtime, |
441 | req->r_oid, req->r_oid_len); | |
442 | ||
f24e9980 SW |
443 | return req; |
444 | } | |
445 | ||
446 | /* | |
447 | * We keep osd requests in an rbtree, sorted by ->r_tid. | |
448 | */ | |
449 | static void __insert_request(struct ceph_osd_client *osdc, | |
450 | struct ceph_osd_request *new) | |
451 | { | |
452 | struct rb_node **p = &osdc->requests.rb_node; | |
453 | struct rb_node *parent = NULL; | |
454 | struct ceph_osd_request *req = NULL; | |
455 | ||
456 | while (*p) { | |
457 | parent = *p; | |
458 | req = rb_entry(parent, struct ceph_osd_request, r_node); | |
459 | if (new->r_tid < req->r_tid) | |
460 | p = &(*p)->rb_left; | |
461 | else if (new->r_tid > req->r_tid) | |
462 | p = &(*p)->rb_right; | |
463 | else | |
464 | BUG(); | |
465 | } | |
466 | ||
467 | rb_link_node(&new->r_node, parent, p); | |
468 | rb_insert_color(&new->r_node, &osdc->requests); | |
469 | } | |
470 | ||
471 | static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc, | |
472 | u64 tid) | |
473 | { | |
474 | struct ceph_osd_request *req; | |
475 | struct rb_node *n = osdc->requests.rb_node; | |
476 | ||
477 | while (n) { | |
478 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
479 | if (tid < req->r_tid) | |
480 | n = n->rb_left; | |
481 | else if (tid > req->r_tid) | |
482 | n = n->rb_right; | |
483 | else | |
484 | return req; | |
485 | } | |
486 | return NULL; | |
487 | } | |
488 | ||
489 | static struct ceph_osd_request * | |
490 | __lookup_request_ge(struct ceph_osd_client *osdc, | |
491 | u64 tid) | |
492 | { | |
493 | struct ceph_osd_request *req; | |
494 | struct rb_node *n = osdc->requests.rb_node; | |
495 | ||
496 | while (n) { | |
497 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
498 | if (tid < req->r_tid) { | |
499 | if (!n->rb_left) | |
500 | return req; | |
501 | n = n->rb_left; | |
502 | } else if (tid > req->r_tid) { | |
503 | n = n->rb_right; | |
504 | } else { | |
505 | return req; | |
506 | } | |
507 | } | |
508 | return NULL; | |
509 | } | |
510 | ||
511 | ||
512 | /* | |
81b024e7 | 513 | * If the osd connection drops, we need to resubmit all requests. |
f24e9980 SW |
514 | */ |
515 | static void osd_reset(struct ceph_connection *con) | |
516 | { | |
517 | struct ceph_osd *osd = con->private; | |
518 | struct ceph_osd_client *osdc; | |
519 | ||
520 | if (!osd) | |
521 | return; | |
522 | dout("osd_reset osd%d\n", osd->o_osd); | |
523 | osdc = osd->o_osdc; | |
f24e9980 SW |
524 | down_read(&osdc->map_sem); |
525 | kick_requests(osdc, osd); | |
526 | up_read(&osdc->map_sem); | |
527 | } | |
528 | ||
529 | /* | |
530 | * Track open sessions with osds. | |
531 | */ | |
532 | static struct ceph_osd *create_osd(struct ceph_osd_client *osdc) | |
533 | { | |
534 | struct ceph_osd *osd; | |
535 | ||
536 | osd = kzalloc(sizeof(*osd), GFP_NOFS); | |
537 | if (!osd) | |
538 | return NULL; | |
539 | ||
540 | atomic_set(&osd->o_ref, 1); | |
541 | osd->o_osdc = osdc; | |
542 | INIT_LIST_HEAD(&osd->o_requests); | |
f5a2041b | 543 | INIT_LIST_HEAD(&osd->o_osd_lru); |
f24e9980 SW |
544 | osd->o_incarnation = 1; |
545 | ||
546 | ceph_con_init(osdc->client->msgr, &osd->o_con); | |
547 | osd->o_con.private = osd; | |
548 | osd->o_con.ops = &osd_con_ops; | |
549 | osd->o_con.peer_name.type = CEPH_ENTITY_TYPE_OSD; | |
4e7a5dcd | 550 | |
422d2cb8 | 551 | INIT_LIST_HEAD(&osd->o_keepalive_item); |
f24e9980 SW |
552 | return osd; |
553 | } | |
554 | ||
555 | static struct ceph_osd *get_osd(struct ceph_osd *osd) | |
556 | { | |
557 | if (atomic_inc_not_zero(&osd->o_ref)) { | |
558 | dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1, | |
559 | atomic_read(&osd->o_ref)); | |
560 | return osd; | |
561 | } else { | |
562 | dout("get_osd %p FAIL\n", osd); | |
563 | return NULL; | |
564 | } | |
565 | } | |
566 | ||
567 | static void put_osd(struct ceph_osd *osd) | |
568 | { | |
569 | dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref), | |
570 | atomic_read(&osd->o_ref) - 1); | |
79494d1b SW |
571 | if (atomic_dec_and_test(&osd->o_ref)) { |
572 | struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth; | |
573 | ||
574 | if (osd->o_authorizer) | |
575 | ac->ops->destroy_authorizer(ac, osd->o_authorizer); | |
f24e9980 | 576 | kfree(osd); |
79494d1b | 577 | } |
f24e9980 SW |
578 | } |
579 | ||
580 | /* | |
581 | * remove an osd from our map | |
582 | */ | |
f5a2041b | 583 | static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) |
f24e9980 | 584 | { |
f5a2041b | 585 | dout("__remove_osd %p\n", osd); |
f24e9980 SW |
586 | BUG_ON(!list_empty(&osd->o_requests)); |
587 | rb_erase(&osd->o_node, &osdc->osds); | |
f5a2041b | 588 | list_del_init(&osd->o_osd_lru); |
f24e9980 SW |
589 | ceph_con_close(&osd->o_con); |
590 | put_osd(osd); | |
591 | } | |
592 | ||
f5a2041b YS |
593 | static void __move_osd_to_lru(struct ceph_osd_client *osdc, |
594 | struct ceph_osd *osd) | |
595 | { | |
596 | dout("__move_osd_to_lru %p\n", osd); | |
597 | BUG_ON(!list_empty(&osd->o_osd_lru)); | |
598 | list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); | |
599 | osd->lru_ttl = jiffies + osdc->client->mount_args->osd_idle_ttl * HZ; | |
600 | } | |
601 | ||
602 | static void __remove_osd_from_lru(struct ceph_osd *osd) | |
603 | { | |
604 | dout("__remove_osd_from_lru %p\n", osd); | |
605 | if (!list_empty(&osd->o_osd_lru)) | |
606 | list_del_init(&osd->o_osd_lru); | |
607 | } | |
608 | ||
609 | static void remove_old_osds(struct ceph_osd_client *osdc, int remove_all) | |
610 | { | |
611 | struct ceph_osd *osd, *nosd; | |
612 | ||
613 | dout("__remove_old_osds %p\n", osdc); | |
614 | mutex_lock(&osdc->request_mutex); | |
615 | list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { | |
616 | if (!remove_all && time_before(jiffies, osd->lru_ttl)) | |
617 | break; | |
618 | __remove_osd(osdc, osd); | |
619 | } | |
620 | mutex_unlock(&osdc->request_mutex); | |
621 | } | |
622 | ||
f24e9980 SW |
623 | /* |
624 | * reset osd connect | |
625 | */ | |
f5a2041b | 626 | static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) |
f24e9980 | 627 | { |
87b315a5 | 628 | struct ceph_osd_request *req; |
f24e9980 SW |
629 | int ret = 0; |
630 | ||
f5a2041b | 631 | dout("__reset_osd %p osd%d\n", osd, osd->o_osd); |
f24e9980 | 632 | if (list_empty(&osd->o_requests)) { |
f5a2041b | 633 | __remove_osd(osdc, osd); |
87b315a5 SW |
634 | } else if (memcmp(&osdc->osdmap->osd_addr[osd->o_osd], |
635 | &osd->o_con.peer_addr, | |
636 | sizeof(osd->o_con.peer_addr)) == 0 && | |
637 | !ceph_con_opened(&osd->o_con)) { | |
638 | dout(" osd addr hasn't changed and connection never opened," | |
639 | " letting msgr retry"); | |
640 | /* touch each r_stamp for handle_timeout()'s benfit */ | |
641 | list_for_each_entry(req, &osd->o_requests, r_osd_item) | |
642 | req->r_stamp = jiffies; | |
643 | ret = -EAGAIN; | |
f24e9980 SW |
644 | } else { |
645 | ceph_con_close(&osd->o_con); | |
646 | ceph_con_open(&osd->o_con, &osdc->osdmap->osd_addr[osd->o_osd]); | |
647 | osd->o_incarnation++; | |
648 | } | |
649 | return ret; | |
650 | } | |
651 | ||
652 | static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new) | |
653 | { | |
654 | struct rb_node **p = &osdc->osds.rb_node; | |
655 | struct rb_node *parent = NULL; | |
656 | struct ceph_osd *osd = NULL; | |
657 | ||
658 | while (*p) { | |
659 | parent = *p; | |
660 | osd = rb_entry(parent, struct ceph_osd, o_node); | |
661 | if (new->o_osd < osd->o_osd) | |
662 | p = &(*p)->rb_left; | |
663 | else if (new->o_osd > osd->o_osd) | |
664 | p = &(*p)->rb_right; | |
665 | else | |
666 | BUG(); | |
667 | } | |
668 | ||
669 | rb_link_node(&new->o_node, parent, p); | |
670 | rb_insert_color(&new->o_node, &osdc->osds); | |
671 | } | |
672 | ||
673 | static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o) | |
674 | { | |
675 | struct ceph_osd *osd; | |
676 | struct rb_node *n = osdc->osds.rb_node; | |
677 | ||
678 | while (n) { | |
679 | osd = rb_entry(n, struct ceph_osd, o_node); | |
680 | if (o < osd->o_osd) | |
681 | n = n->rb_left; | |
682 | else if (o > osd->o_osd) | |
683 | n = n->rb_right; | |
684 | else | |
685 | return osd; | |
686 | } | |
687 | return NULL; | |
688 | } | |
689 | ||
422d2cb8 YS |
690 | static void __schedule_osd_timeout(struct ceph_osd_client *osdc) |
691 | { | |
692 | schedule_delayed_work(&osdc->timeout_work, | |
693 | osdc->client->mount_args->osd_keepalive_timeout * HZ); | |
694 | } | |
695 | ||
696 | static void __cancel_osd_timeout(struct ceph_osd_client *osdc) | |
697 | { | |
698 | cancel_delayed_work(&osdc->timeout_work); | |
699 | } | |
f24e9980 SW |
700 | |
701 | /* | |
702 | * Register request, assign tid. If this is the first request, set up | |
703 | * the timeout event. | |
704 | */ | |
705 | static void register_request(struct ceph_osd_client *osdc, | |
706 | struct ceph_osd_request *req) | |
707 | { | |
f24e9980 SW |
708 | mutex_lock(&osdc->request_mutex); |
709 | req->r_tid = ++osdc->last_tid; | |
6df058c0 | 710 | req->r_request->hdr.tid = cpu_to_le64(req->r_tid); |
422d2cb8 | 711 | INIT_LIST_HEAD(&req->r_req_lru_item); |
f24e9980 SW |
712 | |
713 | dout("register_request %p tid %lld\n", req, req->r_tid); | |
714 | __insert_request(osdc, req); | |
715 | ceph_osdc_get_request(req); | |
716 | osdc->num_requests++; | |
717 | ||
f24e9980 | 718 | if (osdc->num_requests == 1) { |
422d2cb8 YS |
719 | dout(" first request, scheduling timeout\n"); |
720 | __schedule_osd_timeout(osdc); | |
f24e9980 SW |
721 | } |
722 | mutex_unlock(&osdc->request_mutex); | |
723 | } | |
724 | ||
725 | /* | |
726 | * called under osdc->request_mutex | |
727 | */ | |
728 | static void __unregister_request(struct ceph_osd_client *osdc, | |
729 | struct ceph_osd_request *req) | |
730 | { | |
731 | dout("__unregister_request %p tid %lld\n", req, req->r_tid); | |
732 | rb_erase(&req->r_node, &osdc->requests); | |
733 | osdc->num_requests--; | |
734 | ||
0ba6478d SW |
735 | if (req->r_osd) { |
736 | /* make sure the original request isn't in flight. */ | |
737 | ceph_con_revoke(&req->r_osd->o_con, req->r_request); | |
738 | ||
739 | list_del_init(&req->r_osd_item); | |
740 | if (list_empty(&req->r_osd->o_requests)) | |
f5a2041b | 741 | __move_osd_to_lru(osdc, req->r_osd); |
0ba6478d SW |
742 | req->r_osd = NULL; |
743 | } | |
f24e9980 SW |
744 | |
745 | ceph_osdc_put_request(req); | |
746 | ||
422d2cb8 YS |
747 | list_del_init(&req->r_req_lru_item); |
748 | if (osdc->num_requests == 0) { | |
749 | dout(" no requests, canceling timeout\n"); | |
750 | __cancel_osd_timeout(osdc); | |
f24e9980 SW |
751 | } |
752 | } | |
753 | ||
754 | /* | |
755 | * Cancel a previously queued request message | |
756 | */ | |
757 | static void __cancel_request(struct ceph_osd_request *req) | |
758 | { | |
6bc18876 | 759 | if (req->r_sent && req->r_osd) { |
f24e9980 SW |
760 | ceph_con_revoke(&req->r_osd->o_con, req->r_request); |
761 | req->r_sent = 0; | |
762 | } | |
422d2cb8 | 763 | list_del_init(&req->r_req_lru_item); |
f24e9980 SW |
764 | } |
765 | ||
766 | /* | |
767 | * Pick an osd (the first 'up' osd in the pg), allocate the osd struct | |
768 | * (as needed), and set the request r_osd appropriately. If there is | |
769 | * no up osd, set r_osd to NULL. | |
770 | * | |
771 | * Return 0 if unchanged, 1 if changed, or negative on error. | |
772 | * | |
773 | * Caller should hold map_sem for read and request_mutex. | |
774 | */ | |
775 | static int __map_osds(struct ceph_osd_client *osdc, | |
776 | struct ceph_osd_request *req) | |
777 | { | |
778 | struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base; | |
51042122 | 779 | struct ceph_pg pgid; |
d85b7056 SW |
780 | int acting[CEPH_PG_MAX_SIZE]; |
781 | int o = -1, num = 0; | |
f24e9980 | 782 | int err; |
f24e9980 SW |
783 | |
784 | dout("map_osds %p tid %lld\n", req, req->r_tid); | |
785 | err = ceph_calc_object_layout(&reqhead->layout, req->r_oid, | |
786 | &req->r_file_layout, osdc->osdmap); | |
787 | if (err) | |
788 | return err; | |
51042122 | 789 | pgid = reqhead->layout.ol_pgid; |
7740a42f SW |
790 | req->r_pgid = pgid; |
791 | ||
d85b7056 SW |
792 | err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting); |
793 | if (err > 0) { | |
794 | o = acting[0]; | |
795 | num = err; | |
796 | } | |
f24e9980 SW |
797 | |
798 | if ((req->r_osd && req->r_osd->o_osd == o && | |
d85b7056 SW |
799 | req->r_sent >= req->r_osd->o_incarnation && |
800 | req->r_num_pg_osds == num && | |
801 | memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) || | |
f24e9980 SW |
802 | (req->r_osd == NULL && o == -1)) |
803 | return 0; /* no change */ | |
804 | ||
51042122 SW |
805 | dout("map_osds tid %llu pgid %d.%x osd%d (was osd%d)\n", |
806 | req->r_tid, le32_to_cpu(pgid.pool), le16_to_cpu(pgid.ps), o, | |
f24e9980 SW |
807 | req->r_osd ? req->r_osd->o_osd : -1); |
808 | ||
d85b7056 SW |
809 | /* record full pg acting set */ |
810 | memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num); | |
811 | req->r_num_pg_osds = num; | |
812 | ||
f24e9980 SW |
813 | if (req->r_osd) { |
814 | __cancel_request(req); | |
815 | list_del_init(&req->r_osd_item); | |
f24e9980 SW |
816 | req->r_osd = NULL; |
817 | } | |
818 | ||
819 | req->r_osd = __lookup_osd(osdc, o); | |
820 | if (!req->r_osd && o >= 0) { | |
c99eb1c7 SW |
821 | err = -ENOMEM; |
822 | req->r_osd = create_osd(osdc); | |
823 | if (!req->r_osd) | |
824 | goto out; | |
f24e9980 SW |
825 | |
826 | dout("map_osds osd %p is osd%d\n", req->r_osd, o); | |
827 | req->r_osd->o_osd = o; | |
828 | req->r_osd->o_con.peer_name.num = cpu_to_le64(o); | |
829 | __insert_osd(osdc, req->r_osd); | |
830 | ||
831 | ceph_con_open(&req->r_osd->o_con, &osdc->osdmap->osd_addr[o]); | |
832 | } | |
833 | ||
f5a2041b YS |
834 | if (req->r_osd) { |
835 | __remove_osd_from_lru(req->r_osd); | |
f24e9980 | 836 | list_add(&req->r_osd_item, &req->r_osd->o_requests); |
f5a2041b | 837 | } |
d85b7056 | 838 | err = 1; /* osd or pg changed */ |
f24e9980 SW |
839 | |
840 | out: | |
f24e9980 SW |
841 | return err; |
842 | } | |
843 | ||
844 | /* | |
845 | * caller should hold map_sem (for read) and request_mutex | |
846 | */ | |
847 | static int __send_request(struct ceph_osd_client *osdc, | |
848 | struct ceph_osd_request *req) | |
849 | { | |
850 | struct ceph_osd_request_head *reqhead; | |
851 | int err; | |
852 | ||
853 | err = __map_osds(osdc, req); | |
854 | if (err < 0) | |
855 | return err; | |
856 | if (req->r_osd == NULL) { | |
857 | dout("send_request %p no up osds in pg\n", req); | |
858 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
859 | return 0; | |
860 | } | |
861 | ||
862 | dout("send_request %p tid %llu to osd%d flags %d\n", | |
863 | req, req->r_tid, req->r_osd->o_osd, req->r_flags); | |
864 | ||
865 | reqhead = req->r_request->front.iov_base; | |
866 | reqhead->osdmap_epoch = cpu_to_le32(osdc->osdmap->epoch); | |
867 | reqhead->flags |= cpu_to_le32(req->r_flags); /* e.g., RETRY */ | |
868 | reqhead->reassert_version = req->r_reassert_version; | |
869 | ||
3dd72fc0 | 870 | req->r_stamp = jiffies; |
07a27e22 | 871 | list_move_tail(&req->r_req_lru_item, &osdc->req_lru); |
f24e9980 SW |
872 | |
873 | ceph_msg_get(req->r_request); /* send consumes a ref */ | |
874 | ceph_con_send(&req->r_osd->o_con, req->r_request); | |
875 | req->r_sent = req->r_osd->o_incarnation; | |
876 | return 0; | |
877 | } | |
878 | ||
879 | /* | |
880 | * Timeout callback, called every N seconds when 1 or more osd | |
881 | * requests has been active for more than N seconds. When this | |
882 | * happens, we ping all OSDs with requests who have timed out to | |
883 | * ensure any communications channel reset is detected. Reset the | |
884 | * request timeouts another N seconds in the future as we go. | |
885 | * Reschedule the timeout event another N seconds in future (unless | |
886 | * there are no open requests). | |
887 | */ | |
888 | static void handle_timeout(struct work_struct *work) | |
889 | { | |
890 | struct ceph_osd_client *osdc = | |
891 | container_of(work, struct ceph_osd_client, timeout_work.work); | |
422d2cb8 | 892 | struct ceph_osd_request *req, *last_req = NULL; |
f24e9980 | 893 | struct ceph_osd *osd; |
6b805185 | 894 | unsigned long timeout = osdc->client->mount_args->osd_timeout * HZ; |
422d2cb8 YS |
895 | unsigned long keepalive = |
896 | osdc->client->mount_args->osd_keepalive_timeout * HZ; | |
3dd72fc0 | 897 | unsigned long last_stamp = 0; |
f24e9980 | 898 | struct rb_node *p; |
422d2cb8 | 899 | struct list_head slow_osds; |
f24e9980 SW |
900 | |
901 | dout("timeout\n"); | |
902 | down_read(&osdc->map_sem); | |
903 | ||
904 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
905 | ||
906 | mutex_lock(&osdc->request_mutex); | |
907 | for (p = rb_first(&osdc->requests); p; p = rb_next(p)) { | |
908 | req = rb_entry(p, struct ceph_osd_request, r_node); | |
909 | ||
910 | if (req->r_resend) { | |
911 | int err; | |
912 | ||
913 | dout("osdc resending prev failed %lld\n", req->r_tid); | |
914 | err = __send_request(osdc, req); | |
915 | if (err) | |
916 | dout("osdc failed again on %lld\n", req->r_tid); | |
917 | else | |
918 | req->r_resend = false; | |
919 | continue; | |
920 | } | |
921 | } | |
f24e9980 | 922 | |
422d2cb8 YS |
923 | /* |
924 | * reset osds that appear to be _really_ unresponsive. this | |
925 | * is a failsafe measure.. we really shouldn't be getting to | |
926 | * this point if the system is working properly. the monitors | |
927 | * should mark the osd as failed and we should find out about | |
928 | * it from an updated osd map. | |
929 | */ | |
f26e681d | 930 | while (timeout && !list_empty(&osdc->req_lru)) { |
422d2cb8 YS |
931 | req = list_entry(osdc->req_lru.next, struct ceph_osd_request, |
932 | r_req_lru_item); | |
933 | ||
3dd72fc0 | 934 | if (time_before(jiffies, req->r_stamp + timeout)) |
422d2cb8 YS |
935 | break; |
936 | ||
3dd72fc0 | 937 | BUG_ON(req == last_req && req->r_stamp == last_stamp); |
422d2cb8 | 938 | last_req = req; |
3dd72fc0 | 939 | last_stamp = req->r_stamp; |
422d2cb8 YS |
940 | |
941 | osd = req->r_osd; | |
942 | BUG_ON(!osd); | |
943 | pr_warning(" tid %llu timed out on osd%d, will reset osd\n", | |
944 | req->r_tid, osd->o_osd); | |
945 | __kick_requests(osdc, osd); | |
946 | } | |
947 | ||
948 | /* | |
949 | * ping osds that are a bit slow. this ensures that if there | |
950 | * is a break in the TCP connection we will notice, and reopen | |
951 | * a connection with that osd (from the fault callback). | |
952 | */ | |
953 | INIT_LIST_HEAD(&slow_osds); | |
954 | list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) { | |
3dd72fc0 | 955 | if (time_before(jiffies, req->r_stamp + keepalive)) |
422d2cb8 YS |
956 | break; |
957 | ||
958 | osd = req->r_osd; | |
959 | BUG_ON(!osd); | |
960 | dout(" tid %llu is slow, will send keepalive on osd%d\n", | |
f24e9980 | 961 | req->r_tid, osd->o_osd); |
422d2cb8 YS |
962 | list_move_tail(&osd->o_keepalive_item, &slow_osds); |
963 | } | |
964 | while (!list_empty(&slow_osds)) { | |
965 | osd = list_entry(slow_osds.next, struct ceph_osd, | |
966 | o_keepalive_item); | |
967 | list_del_init(&osd->o_keepalive_item); | |
f24e9980 SW |
968 | ceph_con_keepalive(&osd->o_con); |
969 | } | |
970 | ||
422d2cb8 | 971 | __schedule_osd_timeout(osdc); |
f24e9980 SW |
972 | mutex_unlock(&osdc->request_mutex); |
973 | ||
974 | up_read(&osdc->map_sem); | |
975 | } | |
976 | ||
f5a2041b YS |
977 | static void handle_osds_timeout(struct work_struct *work) |
978 | { | |
979 | struct ceph_osd_client *osdc = | |
980 | container_of(work, struct ceph_osd_client, | |
981 | osds_timeout_work.work); | |
982 | unsigned long delay = | |
983 | osdc->client->mount_args->osd_idle_ttl * HZ >> 2; | |
984 | ||
985 | dout("osds timeout\n"); | |
986 | down_read(&osdc->map_sem); | |
987 | remove_old_osds(osdc, 0); | |
988 | up_read(&osdc->map_sem); | |
989 | ||
990 | schedule_delayed_work(&osdc->osds_timeout_work, | |
991 | round_jiffies_relative(delay)); | |
992 | } | |
993 | ||
f24e9980 SW |
994 | /* |
995 | * handle osd op reply. either call the callback if it is specified, | |
996 | * or do the completion to wake up the waiting thread. | |
997 | */ | |
350b1c32 SW |
998 | static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg, |
999 | struct ceph_connection *con) | |
f24e9980 SW |
1000 | { |
1001 | struct ceph_osd_reply_head *rhead = msg->front.iov_base; | |
1002 | struct ceph_osd_request *req; | |
1003 | u64 tid; | |
1004 | int numops, object_len, flags; | |
0ceed5db | 1005 | s32 result; |
f24e9980 | 1006 | |
6df058c0 | 1007 | tid = le64_to_cpu(msg->hdr.tid); |
f24e9980 SW |
1008 | if (msg->front.iov_len < sizeof(*rhead)) |
1009 | goto bad; | |
f24e9980 SW |
1010 | numops = le32_to_cpu(rhead->num_ops); |
1011 | object_len = le32_to_cpu(rhead->object_len); | |
0ceed5db | 1012 | result = le32_to_cpu(rhead->result); |
f24e9980 SW |
1013 | if (msg->front.iov_len != sizeof(*rhead) + object_len + |
1014 | numops * sizeof(struct ceph_osd_op)) | |
1015 | goto bad; | |
0ceed5db | 1016 | dout("handle_reply %p tid %llu result %d\n", msg, tid, (int)result); |
f24e9980 SW |
1017 | |
1018 | /* lookup */ | |
1019 | mutex_lock(&osdc->request_mutex); | |
1020 | req = __lookup_request(osdc, tid); | |
1021 | if (req == NULL) { | |
1022 | dout("handle_reply tid %llu dne\n", tid); | |
1023 | mutex_unlock(&osdc->request_mutex); | |
1024 | return; | |
1025 | } | |
1026 | ceph_osdc_get_request(req); | |
1027 | flags = le32_to_cpu(rhead->flags); | |
1028 | ||
350b1c32 | 1029 | /* |
0d59ab81 | 1030 | * if this connection filled our message, drop our reference now, to |
350b1c32 SW |
1031 | * avoid a (safe but slower) revoke later. |
1032 | */ | |
0d59ab81 | 1033 | if (req->r_con_filling_msg == con && req->r_reply == msg) { |
c16e7869 | 1034 | dout(" dropping con_filling_msg ref %p\n", con); |
0d59ab81 | 1035 | req->r_con_filling_msg = NULL; |
350b1c32 SW |
1036 | ceph_con_put(con); |
1037 | } | |
1038 | ||
f24e9980 SW |
1039 | if (!req->r_got_reply) { |
1040 | unsigned bytes; | |
1041 | ||
1042 | req->r_result = le32_to_cpu(rhead->result); | |
1043 | bytes = le32_to_cpu(msg->hdr.data_len); | |
1044 | dout("handle_reply result %d bytes %d\n", req->r_result, | |
1045 | bytes); | |
1046 | if (req->r_result == 0) | |
1047 | req->r_result = bytes; | |
1048 | ||
1049 | /* in case this is a write and we need to replay, */ | |
1050 | req->r_reassert_version = rhead->reassert_version; | |
1051 | ||
1052 | req->r_got_reply = 1; | |
1053 | } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) { | |
1054 | dout("handle_reply tid %llu dup ack\n", tid); | |
34b43a56 | 1055 | mutex_unlock(&osdc->request_mutex); |
f24e9980 SW |
1056 | goto done; |
1057 | } | |
1058 | ||
1059 | dout("handle_reply tid %llu flags %d\n", tid, flags); | |
1060 | ||
1061 | /* either this is a read, or we got the safe response */ | |
0ceed5db SW |
1062 | if (result < 0 || |
1063 | (flags & CEPH_OSD_FLAG_ONDISK) || | |
f24e9980 SW |
1064 | ((flags & CEPH_OSD_FLAG_WRITE) == 0)) |
1065 | __unregister_request(osdc, req); | |
1066 | ||
1067 | mutex_unlock(&osdc->request_mutex); | |
1068 | ||
1069 | if (req->r_callback) | |
1070 | req->r_callback(req, msg); | |
1071 | else | |
03066f23 | 1072 | complete_all(&req->r_completion); |
f24e9980 SW |
1073 | |
1074 | if (flags & CEPH_OSD_FLAG_ONDISK) { | |
1075 | if (req->r_safe_callback) | |
1076 | req->r_safe_callback(req, msg); | |
03066f23 | 1077 | complete_all(&req->r_safe_completion); /* fsync waiter */ |
f24e9980 SW |
1078 | } |
1079 | ||
1080 | done: | |
1081 | ceph_osdc_put_request(req); | |
1082 | return; | |
1083 | ||
1084 | bad: | |
1085 | pr_err("corrupt osd_op_reply got %d %d expected %d\n", | |
1086 | (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len), | |
1087 | (int)sizeof(*rhead)); | |
9ec7cab1 | 1088 | ceph_msg_dump(msg); |
f24e9980 SW |
1089 | } |
1090 | ||
1091 | ||
422d2cb8 | 1092 | static int __kick_requests(struct ceph_osd_client *osdc, |
f24e9980 SW |
1093 | struct ceph_osd *kickosd) |
1094 | { | |
1095 | struct ceph_osd_request *req; | |
1096 | struct rb_node *p, *n; | |
1097 | int needmap = 0; | |
1098 | int err; | |
1099 | ||
1100 | dout("kick_requests osd%d\n", kickosd ? kickosd->o_osd : -1); | |
153a008b | 1101 | if (kickosd) { |
87b315a5 SW |
1102 | err = __reset_osd(osdc, kickosd); |
1103 | if (err == -EAGAIN) | |
1104 | return 1; | |
153a008b | 1105 | } else { |
f24e9980 SW |
1106 | for (p = rb_first(&osdc->osds); p; p = n) { |
1107 | struct ceph_osd *osd = | |
1108 | rb_entry(p, struct ceph_osd, o_node); | |
1109 | ||
1110 | n = rb_next(p); | |
1111 | if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || | |
103e2d3a SW |
1112 | memcmp(&osd->o_con.peer_addr, |
1113 | ceph_osd_addr(osdc->osdmap, | |
1114 | osd->o_osd), | |
1115 | sizeof(struct ceph_entity_addr)) != 0) | |
f5a2041b | 1116 | __reset_osd(osdc, osd); |
f24e9980 SW |
1117 | } |
1118 | } | |
1119 | ||
1120 | for (p = rb_first(&osdc->requests); p; p = rb_next(p)) { | |
1121 | req = rb_entry(p, struct ceph_osd_request, r_node); | |
1122 | ||
1123 | if (req->r_resend) { | |
1124 | dout(" r_resend set on tid %llu\n", req->r_tid); | |
266673db | 1125 | __cancel_request(req); |
f24e9980 SW |
1126 | goto kick; |
1127 | } | |
266673db SW |
1128 | if (req->r_osd && kickosd == req->r_osd) { |
1129 | __cancel_request(req); | |
f24e9980 | 1130 | goto kick; |
266673db | 1131 | } |
f24e9980 SW |
1132 | |
1133 | err = __map_osds(osdc, req); | |
1134 | if (err == 0) | |
1135 | continue; /* no change */ | |
1136 | if (err < 0) { | |
1137 | /* | |
1138 | * FIXME: really, we should set the request | |
1139 | * error and fail if this isn't a 'nofail' | |
1140 | * request, but that's a fair bit more | |
1141 | * complicated to do. So retry! | |
1142 | */ | |
1143 | dout(" setting r_resend on %llu\n", req->r_tid); | |
1144 | req->r_resend = true; | |
1145 | continue; | |
1146 | } | |
1147 | if (req->r_osd == NULL) { | |
1148 | dout("tid %llu maps to no valid osd\n", req->r_tid); | |
1149 | needmap++; /* request a newer map */ | |
1150 | continue; | |
1151 | } | |
1152 | ||
1153 | kick: | |
c1ea8823 | 1154 | dout("kicking %p tid %llu osd%d\n", req, req->r_tid, |
12eadc19 | 1155 | req->r_osd ? req->r_osd->o_osd : -1); |
f24e9980 SW |
1156 | req->r_flags |= CEPH_OSD_FLAG_RETRY; |
1157 | err = __send_request(osdc, req); | |
1158 | if (err) { | |
1159 | dout(" setting r_resend on %llu\n", req->r_tid); | |
1160 | req->r_resend = true; | |
1161 | } | |
1162 | } | |
422d2cb8 YS |
1163 | |
1164 | return needmap; | |
1165 | } | |
1166 | ||
1167 | /* | |
1168 | * Resubmit osd requests whose osd or osd address has changed. Request | |
1169 | * a new osd map if osds are down, or we are otherwise unable to determine | |
1170 | * how to direct a request. | |
1171 | * | |
1172 | * Close connections to down osds. | |
1173 | * | |
1174 | * If @who is specified, resubmit requests for that specific osd. | |
1175 | * | |
1176 | * Caller should hold map_sem for read and request_mutex. | |
1177 | */ | |
1178 | static void kick_requests(struct ceph_osd_client *osdc, | |
1179 | struct ceph_osd *kickosd) | |
1180 | { | |
1181 | int needmap; | |
1182 | ||
1183 | mutex_lock(&osdc->request_mutex); | |
1184 | needmap = __kick_requests(osdc, kickosd); | |
f24e9980 SW |
1185 | mutex_unlock(&osdc->request_mutex); |
1186 | ||
1187 | if (needmap) { | |
1188 | dout("%d requests for down osds, need new map\n", needmap); | |
1189 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1190 | } | |
f24e9980 | 1191 | |
422d2cb8 | 1192 | } |
f24e9980 SW |
1193 | /* |
1194 | * Process updated osd map. | |
1195 | * | |
1196 | * The message contains any number of incremental and full maps, normally | |
1197 | * indicating some sort of topology change in the cluster. Kick requests | |
1198 | * off to different OSDs as needed. | |
1199 | */ | |
1200 | void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) | |
1201 | { | |
1202 | void *p, *end, *next; | |
1203 | u32 nr_maps, maplen; | |
1204 | u32 epoch; | |
1205 | struct ceph_osdmap *newmap = NULL, *oldmap; | |
1206 | int err; | |
1207 | struct ceph_fsid fsid; | |
1208 | ||
1209 | dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0); | |
1210 | p = msg->front.iov_base; | |
1211 | end = p + msg->front.iov_len; | |
1212 | ||
1213 | /* verify fsid */ | |
1214 | ceph_decode_need(&p, end, sizeof(fsid), bad); | |
1215 | ceph_decode_copy(&p, &fsid, sizeof(fsid)); | |
0743304d SW |
1216 | if (ceph_check_fsid(osdc->client, &fsid) < 0) |
1217 | return; | |
f24e9980 SW |
1218 | |
1219 | down_write(&osdc->map_sem); | |
1220 | ||
1221 | /* incremental maps */ | |
1222 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
1223 | dout(" %d inc maps\n", nr_maps); | |
1224 | while (nr_maps > 0) { | |
1225 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
1226 | epoch = ceph_decode_32(&p); |
1227 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
1228 | ceph_decode_need(&p, end, maplen, bad); |
1229 | next = p + maplen; | |
1230 | if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) { | |
1231 | dout("applying incremental map %u len %d\n", | |
1232 | epoch, maplen); | |
1233 | newmap = osdmap_apply_incremental(&p, next, | |
1234 | osdc->osdmap, | |
1235 | osdc->client->msgr); | |
1236 | if (IS_ERR(newmap)) { | |
1237 | err = PTR_ERR(newmap); | |
1238 | goto bad; | |
1239 | } | |
30dc6381 | 1240 | BUG_ON(!newmap); |
f24e9980 SW |
1241 | if (newmap != osdc->osdmap) { |
1242 | ceph_osdmap_destroy(osdc->osdmap); | |
1243 | osdc->osdmap = newmap; | |
1244 | } | |
1245 | } else { | |
1246 | dout("ignoring incremental map %u len %d\n", | |
1247 | epoch, maplen); | |
1248 | } | |
1249 | p = next; | |
1250 | nr_maps--; | |
1251 | } | |
1252 | if (newmap) | |
1253 | goto done; | |
1254 | ||
1255 | /* full maps */ | |
1256 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
1257 | dout(" %d full maps\n", nr_maps); | |
1258 | while (nr_maps) { | |
1259 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
1260 | epoch = ceph_decode_32(&p); |
1261 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
1262 | ceph_decode_need(&p, end, maplen, bad); |
1263 | if (nr_maps > 1) { | |
1264 | dout("skipping non-latest full map %u len %d\n", | |
1265 | epoch, maplen); | |
1266 | } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) { | |
1267 | dout("skipping full map %u len %d, " | |
1268 | "older than our %u\n", epoch, maplen, | |
1269 | osdc->osdmap->epoch); | |
1270 | } else { | |
1271 | dout("taking full map %u len %d\n", epoch, maplen); | |
1272 | newmap = osdmap_decode(&p, p+maplen); | |
1273 | if (IS_ERR(newmap)) { | |
1274 | err = PTR_ERR(newmap); | |
1275 | goto bad; | |
1276 | } | |
30dc6381 | 1277 | BUG_ON(!newmap); |
f24e9980 SW |
1278 | oldmap = osdc->osdmap; |
1279 | osdc->osdmap = newmap; | |
1280 | if (oldmap) | |
1281 | ceph_osdmap_destroy(oldmap); | |
1282 | } | |
1283 | p += maplen; | |
1284 | nr_maps--; | |
1285 | } | |
1286 | ||
1287 | done: | |
1288 | downgrade_write(&osdc->map_sem); | |
1289 | ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch); | |
1290 | if (newmap) | |
1291 | kick_requests(osdc, NULL); | |
1292 | up_read(&osdc->map_sem); | |
03066f23 | 1293 | wake_up_all(&osdc->client->auth_wq); |
f24e9980 SW |
1294 | return; |
1295 | ||
1296 | bad: | |
1297 | pr_err("osdc handle_map corrupt msg\n"); | |
9ec7cab1 | 1298 | ceph_msg_dump(msg); |
f24e9980 SW |
1299 | up_write(&osdc->map_sem); |
1300 | return; | |
1301 | } | |
1302 | ||
f24e9980 SW |
1303 | /* |
1304 | * Register request, send initial attempt. | |
1305 | */ | |
1306 | int ceph_osdc_start_request(struct ceph_osd_client *osdc, | |
1307 | struct ceph_osd_request *req, | |
1308 | bool nofail) | |
1309 | { | |
c1ea8823 | 1310 | int rc = 0; |
f24e9980 SW |
1311 | |
1312 | req->r_request->pages = req->r_pages; | |
1313 | req->r_request->nr_pages = req->r_num_pages; | |
68b4476b YS |
1314 | #ifdef CONFIG_BLOCK |
1315 | req->r_request->bio = req->r_bio; | |
1316 | #endif | |
1317 | req->r_request->trail = req->r_trail; | |
f24e9980 SW |
1318 | |
1319 | register_request(osdc, req); | |
1320 | ||
1321 | down_read(&osdc->map_sem); | |
1322 | mutex_lock(&osdc->request_mutex); | |
c1ea8823 SW |
1323 | /* |
1324 | * a racing kick_requests() may have sent the message for us | |
1325 | * while we dropped request_mutex above, so only send now if | |
1326 | * the request still han't been touched yet. | |
1327 | */ | |
1328 | if (req->r_sent == 0) { | |
1329 | rc = __send_request(osdc, req); | |
1330 | if (rc) { | |
1331 | if (nofail) { | |
1332 | dout("osdc_start_request failed send, " | |
1333 | " marking %lld\n", req->r_tid); | |
1334 | req->r_resend = true; | |
1335 | rc = 0; | |
1336 | } else { | |
1337 | __unregister_request(osdc, req); | |
1338 | } | |
f24e9980 SW |
1339 | } |
1340 | } | |
1341 | mutex_unlock(&osdc->request_mutex); | |
1342 | up_read(&osdc->map_sem); | |
1343 | return rc; | |
1344 | } | |
1345 | ||
1346 | /* | |
1347 | * wait for a request to complete | |
1348 | */ | |
1349 | int ceph_osdc_wait_request(struct ceph_osd_client *osdc, | |
1350 | struct ceph_osd_request *req) | |
1351 | { | |
1352 | int rc; | |
1353 | ||
1354 | rc = wait_for_completion_interruptible(&req->r_completion); | |
1355 | if (rc < 0) { | |
1356 | mutex_lock(&osdc->request_mutex); | |
1357 | __cancel_request(req); | |
529cfcc4 | 1358 | __unregister_request(osdc, req); |
f24e9980 | 1359 | mutex_unlock(&osdc->request_mutex); |
529cfcc4 | 1360 | dout("wait_request tid %llu canceled/timed out\n", req->r_tid); |
f24e9980 SW |
1361 | return rc; |
1362 | } | |
1363 | ||
1364 | dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result); | |
1365 | return req->r_result; | |
1366 | } | |
1367 | ||
1368 | /* | |
1369 | * sync - wait for all in-flight requests to flush. avoid starvation. | |
1370 | */ | |
1371 | void ceph_osdc_sync(struct ceph_osd_client *osdc) | |
1372 | { | |
1373 | struct ceph_osd_request *req; | |
1374 | u64 last_tid, next_tid = 0; | |
1375 | ||
1376 | mutex_lock(&osdc->request_mutex); | |
1377 | last_tid = osdc->last_tid; | |
1378 | while (1) { | |
1379 | req = __lookup_request_ge(osdc, next_tid); | |
1380 | if (!req) | |
1381 | break; | |
1382 | if (req->r_tid > last_tid) | |
1383 | break; | |
1384 | ||
1385 | next_tid = req->r_tid + 1; | |
1386 | if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0) | |
1387 | continue; | |
1388 | ||
1389 | ceph_osdc_get_request(req); | |
1390 | mutex_unlock(&osdc->request_mutex); | |
1391 | dout("sync waiting on tid %llu (last is %llu)\n", | |
1392 | req->r_tid, last_tid); | |
1393 | wait_for_completion(&req->r_safe_completion); | |
1394 | mutex_lock(&osdc->request_mutex); | |
1395 | ceph_osdc_put_request(req); | |
1396 | } | |
1397 | mutex_unlock(&osdc->request_mutex); | |
1398 | dout("sync done (thru tid %llu)\n", last_tid); | |
1399 | } | |
1400 | ||
1401 | /* | |
1402 | * init, shutdown | |
1403 | */ | |
1404 | int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) | |
1405 | { | |
1406 | int err; | |
1407 | ||
1408 | dout("init\n"); | |
1409 | osdc->client = client; | |
1410 | osdc->osdmap = NULL; | |
1411 | init_rwsem(&osdc->map_sem); | |
1412 | init_completion(&osdc->map_waiters); | |
1413 | osdc->last_requested_map = 0; | |
1414 | mutex_init(&osdc->request_mutex); | |
f24e9980 SW |
1415 | osdc->last_tid = 0; |
1416 | osdc->osds = RB_ROOT; | |
f5a2041b | 1417 | INIT_LIST_HEAD(&osdc->osd_lru); |
f24e9980 | 1418 | osdc->requests = RB_ROOT; |
422d2cb8 | 1419 | INIT_LIST_HEAD(&osdc->req_lru); |
f24e9980 SW |
1420 | osdc->num_requests = 0; |
1421 | INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); | |
f5a2041b YS |
1422 | INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); |
1423 | ||
1424 | schedule_delayed_work(&osdc->osds_timeout_work, | |
1425 | round_jiffies_relative(osdc->client->mount_args->osd_idle_ttl * HZ)); | |
f24e9980 | 1426 | |
5f44f142 | 1427 | err = -ENOMEM; |
f24e9980 SW |
1428 | osdc->req_mempool = mempool_create_kmalloc_pool(10, |
1429 | sizeof(struct ceph_osd_request)); | |
1430 | if (!osdc->req_mempool) | |
5f44f142 | 1431 | goto out; |
f24e9980 | 1432 | |
4f48280e SW |
1433 | err = ceph_msgpool_init(&osdc->msgpool_op, OSD_OP_FRONT_LEN, 10, true, |
1434 | "osd_op"); | |
f24e9980 | 1435 | if (err < 0) |
5f44f142 | 1436 | goto out_mempool; |
c16e7869 | 1437 | err = ceph_msgpool_init(&osdc->msgpool_op_reply, |
4f48280e SW |
1438 | OSD_OPREPLY_FRONT_LEN, 10, true, |
1439 | "osd_op_reply"); | |
c16e7869 SW |
1440 | if (err < 0) |
1441 | goto out_msgpool; | |
f24e9980 | 1442 | return 0; |
5f44f142 | 1443 | |
c16e7869 SW |
1444 | out_msgpool: |
1445 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
5f44f142 SW |
1446 | out_mempool: |
1447 | mempool_destroy(osdc->req_mempool); | |
1448 | out: | |
1449 | return err; | |
f24e9980 SW |
1450 | } |
1451 | ||
1452 | void ceph_osdc_stop(struct ceph_osd_client *osdc) | |
1453 | { | |
1454 | cancel_delayed_work_sync(&osdc->timeout_work); | |
f5a2041b | 1455 | cancel_delayed_work_sync(&osdc->osds_timeout_work); |
f24e9980 SW |
1456 | if (osdc->osdmap) { |
1457 | ceph_osdmap_destroy(osdc->osdmap); | |
1458 | osdc->osdmap = NULL; | |
1459 | } | |
f5a2041b | 1460 | remove_old_osds(osdc, 1); |
f24e9980 SW |
1461 | mempool_destroy(osdc->req_mempool); |
1462 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
c16e7869 | 1463 | ceph_msgpool_destroy(&osdc->msgpool_op_reply); |
f24e9980 SW |
1464 | } |
1465 | ||
1466 | /* | |
1467 | * Read some contiguous pages. If we cross a stripe boundary, shorten | |
1468 | * *plen. Return number of bytes read, or error. | |
1469 | */ | |
1470 | int ceph_osdc_readpages(struct ceph_osd_client *osdc, | |
1471 | struct ceph_vino vino, struct ceph_file_layout *layout, | |
1472 | u64 off, u64 *plen, | |
1473 | u32 truncate_seq, u64 truncate_size, | |
1474 | struct page **pages, int num_pages) | |
1475 | { | |
1476 | struct ceph_osd_request *req; | |
1477 | int rc = 0; | |
1478 | ||
1479 | dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, | |
1480 | vino.snap, off, *plen); | |
1481 | req = ceph_osdc_new_request(osdc, layout, vino, off, plen, | |
1482 | CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, | |
1483 | NULL, 0, truncate_seq, truncate_size, NULL, | |
1484 | false, 1); | |
a79832f2 SW |
1485 | if (!req) |
1486 | return -ENOMEM; | |
f24e9980 SW |
1487 | |
1488 | /* it may be a short read due to an object boundary */ | |
1489 | req->r_pages = pages; | |
f24e9980 SW |
1490 | |
1491 | dout("readpages final extent is %llu~%llu (%d pages)\n", | |
1492 | off, *plen, req->r_num_pages); | |
1493 | ||
1494 | rc = ceph_osdc_start_request(osdc, req, false); | |
1495 | if (!rc) | |
1496 | rc = ceph_osdc_wait_request(osdc, req); | |
1497 | ||
1498 | ceph_osdc_put_request(req); | |
1499 | dout("readpages result %d\n", rc); | |
1500 | return rc; | |
1501 | } | |
1502 | ||
1503 | /* | |
1504 | * do a synchronous write on N pages | |
1505 | */ | |
1506 | int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, | |
1507 | struct ceph_file_layout *layout, | |
1508 | struct ceph_snap_context *snapc, | |
1509 | u64 off, u64 len, | |
1510 | u32 truncate_seq, u64 truncate_size, | |
1511 | struct timespec *mtime, | |
1512 | struct page **pages, int num_pages, | |
1513 | int flags, int do_sync, bool nofail) | |
1514 | { | |
1515 | struct ceph_osd_request *req; | |
1516 | int rc = 0; | |
1517 | ||
1518 | BUG_ON(vino.snap != CEPH_NOSNAP); | |
1519 | req = ceph_osdc_new_request(osdc, layout, vino, off, &len, | |
1520 | CEPH_OSD_OP_WRITE, | |
1521 | flags | CEPH_OSD_FLAG_ONDISK | | |
1522 | CEPH_OSD_FLAG_WRITE, | |
1523 | snapc, do_sync, | |
1524 | truncate_seq, truncate_size, mtime, | |
1525 | nofail, 1); | |
a79832f2 SW |
1526 | if (!req) |
1527 | return -ENOMEM; | |
f24e9980 SW |
1528 | |
1529 | /* it may be a short write due to an object boundary */ | |
1530 | req->r_pages = pages; | |
f24e9980 SW |
1531 | dout("writepages %llu~%llu (%d pages)\n", off, len, |
1532 | req->r_num_pages); | |
1533 | ||
1534 | rc = ceph_osdc_start_request(osdc, req, nofail); | |
1535 | if (!rc) | |
1536 | rc = ceph_osdc_wait_request(osdc, req); | |
1537 | ||
1538 | ceph_osdc_put_request(req); | |
1539 | if (rc == 0) | |
1540 | rc = len; | |
1541 | dout("writepages result %d\n", rc); | |
1542 | return rc; | |
1543 | } | |
1544 | ||
1545 | /* | |
1546 | * handle incoming message | |
1547 | */ | |
1548 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
1549 | { | |
1550 | struct ceph_osd *osd = con->private; | |
32c895e7 | 1551 | struct ceph_osd_client *osdc; |
f24e9980 SW |
1552 | int type = le16_to_cpu(msg->hdr.type); |
1553 | ||
1554 | if (!osd) | |
4a32f93d | 1555 | goto out; |
32c895e7 | 1556 | osdc = osd->o_osdc; |
f24e9980 SW |
1557 | |
1558 | switch (type) { | |
1559 | case CEPH_MSG_OSD_MAP: | |
1560 | ceph_osdc_handle_map(osdc, msg); | |
1561 | break; | |
1562 | case CEPH_MSG_OSD_OPREPLY: | |
350b1c32 | 1563 | handle_reply(osdc, msg, con); |
f24e9980 SW |
1564 | break; |
1565 | ||
1566 | default: | |
1567 | pr_err("received unknown message type %d %s\n", type, | |
1568 | ceph_msg_type_name(type)); | |
1569 | } | |
4a32f93d | 1570 | out: |
f24e9980 SW |
1571 | ceph_msg_put(msg); |
1572 | } | |
1573 | ||
5b3a4db3 | 1574 | /* |
21b667f6 SW |
1575 | * lookup and return message for incoming reply. set up reply message |
1576 | * pages. | |
5b3a4db3 SW |
1577 | */ |
1578 | static struct ceph_msg *get_reply(struct ceph_connection *con, | |
2450418c YS |
1579 | struct ceph_msg_header *hdr, |
1580 | int *skip) | |
f24e9980 SW |
1581 | { |
1582 | struct ceph_osd *osd = con->private; | |
1583 | struct ceph_osd_client *osdc = osd->o_osdc; | |
2450418c | 1584 | struct ceph_msg *m; |
0547a9b3 | 1585 | struct ceph_osd_request *req; |
5b3a4db3 SW |
1586 | int front = le32_to_cpu(hdr->front_len); |
1587 | int data_len = le32_to_cpu(hdr->data_len); | |
0547a9b3 | 1588 | u64 tid; |
f24e9980 | 1589 | |
0547a9b3 YS |
1590 | tid = le64_to_cpu(hdr->tid); |
1591 | mutex_lock(&osdc->request_mutex); | |
1592 | req = __lookup_request(osdc, tid); | |
1593 | if (!req) { | |
1594 | *skip = 1; | |
1595 | m = NULL; | |
c16e7869 | 1596 | pr_info("get_reply unknown tid %llu from osd%d\n", tid, |
5b3a4db3 | 1597 | osd->o_osd); |
0547a9b3 YS |
1598 | goto out; |
1599 | } | |
c16e7869 SW |
1600 | |
1601 | if (req->r_con_filling_msg) { | |
1602 | dout("get_reply revoking msg %p from old con %p\n", | |
1603 | req->r_reply, req->r_con_filling_msg); | |
1604 | ceph_con_revoke_message(req->r_con_filling_msg, req->r_reply); | |
1605 | ceph_con_put(req->r_con_filling_msg); | |
6f46cb29 | 1606 | req->r_con_filling_msg = NULL; |
0547a9b3 YS |
1607 | } |
1608 | ||
c16e7869 SW |
1609 | if (front > req->r_reply->front.iov_len) { |
1610 | pr_warning("get_reply front %d > preallocated %d\n", | |
1611 | front, (int)req->r_reply->front.iov_len); | |
34d23762 | 1612 | m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS); |
a79832f2 | 1613 | if (!m) |
c16e7869 SW |
1614 | goto out; |
1615 | ceph_msg_put(req->r_reply); | |
1616 | req->r_reply = m; | |
1617 | } | |
1618 | m = ceph_msg_get(req->r_reply); | |
1619 | ||
0547a9b3 | 1620 | if (data_len > 0) { |
21b667f6 SW |
1621 | unsigned data_off = le16_to_cpu(hdr->data_off); |
1622 | int want = calc_pages_for(data_off & ~PAGE_MASK, data_len); | |
1623 | ||
1624 | if (unlikely(req->r_num_pages < want)) { | |
1625 | pr_warning("tid %lld reply %d > expected %d pages\n", | |
1626 | tid, want, m->nr_pages); | |
0547a9b3 YS |
1627 | *skip = 1; |
1628 | ceph_msg_put(m); | |
a79832f2 | 1629 | m = NULL; |
21b667f6 | 1630 | goto out; |
0547a9b3 | 1631 | } |
21b667f6 SW |
1632 | m->pages = req->r_pages; |
1633 | m->nr_pages = req->r_num_pages; | |
68b4476b YS |
1634 | #ifdef CONFIG_BLOCK |
1635 | m->bio = req->r_bio; | |
1636 | #endif | |
0547a9b3 | 1637 | } |
5b3a4db3 | 1638 | *skip = 0; |
c16e7869 SW |
1639 | req->r_con_filling_msg = ceph_con_get(con); |
1640 | dout("get_reply tid %lld %p\n", tid, m); | |
0547a9b3 YS |
1641 | |
1642 | out: | |
1643 | mutex_unlock(&osdc->request_mutex); | |
2450418c | 1644 | return m; |
5b3a4db3 SW |
1645 | |
1646 | } | |
1647 | ||
1648 | static struct ceph_msg *alloc_msg(struct ceph_connection *con, | |
1649 | struct ceph_msg_header *hdr, | |
1650 | int *skip) | |
1651 | { | |
1652 | struct ceph_osd *osd = con->private; | |
1653 | int type = le16_to_cpu(hdr->type); | |
1654 | int front = le32_to_cpu(hdr->front_len); | |
1655 | ||
1656 | switch (type) { | |
1657 | case CEPH_MSG_OSD_MAP: | |
34d23762 | 1658 | return ceph_msg_new(type, front, GFP_NOFS); |
5b3a4db3 SW |
1659 | case CEPH_MSG_OSD_OPREPLY: |
1660 | return get_reply(con, hdr, skip); | |
1661 | default: | |
1662 | pr_info("alloc_msg unexpected msg type %d from osd%d\n", type, | |
1663 | osd->o_osd); | |
1664 | *skip = 1; | |
1665 | return NULL; | |
1666 | } | |
f24e9980 SW |
1667 | } |
1668 | ||
1669 | /* | |
1670 | * Wrappers to refcount containing ceph_osd struct | |
1671 | */ | |
1672 | static struct ceph_connection *get_osd_con(struct ceph_connection *con) | |
1673 | { | |
1674 | struct ceph_osd *osd = con->private; | |
1675 | if (get_osd(osd)) | |
1676 | return con; | |
1677 | return NULL; | |
1678 | } | |
1679 | ||
1680 | static void put_osd_con(struct ceph_connection *con) | |
1681 | { | |
1682 | struct ceph_osd *osd = con->private; | |
1683 | put_osd(osd); | |
1684 | } | |
1685 | ||
4e7a5dcd SW |
1686 | /* |
1687 | * authentication | |
1688 | */ | |
1689 | static int get_authorizer(struct ceph_connection *con, | |
213c99ee SW |
1690 | void **buf, int *len, int *proto, |
1691 | void **reply_buf, int *reply_len, int force_new) | |
4e7a5dcd SW |
1692 | { |
1693 | struct ceph_osd *o = con->private; | |
1694 | struct ceph_osd_client *osdc = o->o_osdc; | |
1695 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
1696 | int ret = 0; | |
1697 | ||
1698 | if (force_new && o->o_authorizer) { | |
1699 | ac->ops->destroy_authorizer(ac, o->o_authorizer); | |
1700 | o->o_authorizer = NULL; | |
1701 | } | |
1702 | if (o->o_authorizer == NULL) { | |
1703 | ret = ac->ops->create_authorizer( | |
1704 | ac, CEPH_ENTITY_TYPE_OSD, | |
1705 | &o->o_authorizer, | |
1706 | &o->o_authorizer_buf, | |
1707 | &o->o_authorizer_buf_len, | |
1708 | &o->o_authorizer_reply_buf, | |
1709 | &o->o_authorizer_reply_buf_len); | |
1710 | if (ret) | |
213c99ee | 1711 | return ret; |
4e7a5dcd SW |
1712 | } |
1713 | ||
1714 | *proto = ac->protocol; | |
1715 | *buf = o->o_authorizer_buf; | |
1716 | *len = o->o_authorizer_buf_len; | |
1717 | *reply_buf = o->o_authorizer_reply_buf; | |
1718 | *reply_len = o->o_authorizer_reply_buf_len; | |
1719 | return 0; | |
1720 | } | |
1721 | ||
1722 | ||
1723 | static int verify_authorizer_reply(struct ceph_connection *con, int len) | |
1724 | { | |
1725 | struct ceph_osd *o = con->private; | |
1726 | struct ceph_osd_client *osdc = o->o_osdc; | |
1727 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
1728 | ||
1729 | return ac->ops->verify_authorizer_reply(ac, o->o_authorizer, len); | |
1730 | } | |
1731 | ||
9bd2e6f8 SW |
1732 | static int invalidate_authorizer(struct ceph_connection *con) |
1733 | { | |
1734 | struct ceph_osd *o = con->private; | |
1735 | struct ceph_osd_client *osdc = o->o_osdc; | |
1736 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
1737 | ||
1738 | if (ac->ops->invalidate_authorizer) | |
1739 | ac->ops->invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); | |
1740 | ||
1741 | return ceph_monc_validate_auth(&osdc->client->monc); | |
1742 | } | |
4e7a5dcd | 1743 | |
9e32789f | 1744 | static const struct ceph_connection_operations osd_con_ops = { |
f24e9980 SW |
1745 | .get = get_osd_con, |
1746 | .put = put_osd_con, | |
1747 | .dispatch = dispatch, | |
4e7a5dcd SW |
1748 | .get_authorizer = get_authorizer, |
1749 | .verify_authorizer_reply = verify_authorizer_reply, | |
9bd2e6f8 | 1750 | .invalidate_authorizer = invalidate_authorizer, |
f24e9980 | 1751 | .alloc_msg = alloc_msg, |
81b024e7 | 1752 | .fault = osd_reset, |
f24e9980 | 1753 | }; |