Commit | Line | Data |
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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: | |
ae1533b6 | 164 | case CEPH_OSD_OP_CALL: |
68b4476b YS |
165 | return 1; |
166 | default: | |
167 | return 0; | |
168 | } | |
169 | } | |
170 | ||
171 | static int get_num_ops(struct ceph_osd_req_op *ops, int *needs_trail) | |
172 | { | |
173 | int i = 0; | |
174 | ||
175 | if (needs_trail) | |
176 | *needs_trail = 0; | |
177 | while (ops[i].op) { | |
178 | if (needs_trail && op_needs_trail(ops[i].op)) | |
179 | *needs_trail = 1; | |
180 | i++; | |
181 | } | |
182 | ||
183 | return i; | |
184 | } | |
185 | ||
3499e8a5 YS |
186 | struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, |
187 | int flags, | |
f24e9980 | 188 | struct ceph_snap_context *snapc, |
68b4476b | 189 | struct ceph_osd_req_op *ops, |
3499e8a5 YS |
190 | bool use_mempool, |
191 | gfp_t gfp_flags, | |
68b4476b YS |
192 | struct page **pages, |
193 | struct bio *bio) | |
f24e9980 SW |
194 | { |
195 | struct ceph_osd_request *req; | |
196 | struct ceph_msg *msg; | |
68b4476b YS |
197 | int needs_trail; |
198 | int num_op = get_num_ops(ops, &needs_trail); | |
199 | size_t msg_size = sizeof(struct ceph_osd_request_head); | |
3499e8a5 | 200 | |
68b4476b | 201 | msg_size += num_op*sizeof(struct ceph_osd_op); |
f24e9980 SW |
202 | |
203 | if (use_mempool) { | |
3499e8a5 | 204 | req = mempool_alloc(osdc->req_mempool, gfp_flags); |
f24e9980 SW |
205 | memset(req, 0, sizeof(*req)); |
206 | } else { | |
3499e8a5 | 207 | req = kzalloc(sizeof(*req), gfp_flags); |
f24e9980 SW |
208 | } |
209 | if (req == NULL) | |
a79832f2 | 210 | return NULL; |
f24e9980 | 211 | |
f24e9980 SW |
212 | req->r_osdc = osdc; |
213 | req->r_mempool = use_mempool; | |
68b4476b | 214 | |
415e49a9 | 215 | kref_init(&req->r_kref); |
f24e9980 SW |
216 | init_completion(&req->r_completion); |
217 | init_completion(&req->r_safe_completion); | |
218 | INIT_LIST_HEAD(&req->r_unsafe_item); | |
219 | req->r_flags = flags; | |
220 | ||
221 | WARN_ON((flags & (CEPH_OSD_FLAG_READ|CEPH_OSD_FLAG_WRITE)) == 0); | |
222 | ||
c16e7869 SW |
223 | /* create reply message */ |
224 | if (use_mempool) | |
225 | msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); | |
226 | else | |
227 | msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, | |
3499e8a5 | 228 | OSD_OPREPLY_FRONT_LEN, gfp_flags); |
a79832f2 | 229 | if (!msg) { |
c16e7869 | 230 | ceph_osdc_put_request(req); |
a79832f2 | 231 | return NULL; |
c16e7869 SW |
232 | } |
233 | req->r_reply = msg; | |
234 | ||
68b4476b YS |
235 | /* allocate space for the trailing data */ |
236 | if (needs_trail) { | |
237 | req->r_trail = kmalloc(sizeof(struct ceph_pagelist), gfp_flags); | |
238 | if (!req->r_trail) { | |
239 | ceph_osdc_put_request(req); | |
240 | return NULL; | |
241 | } | |
242 | ceph_pagelist_init(req->r_trail); | |
243 | } | |
c16e7869 | 244 | /* create request message; allow space for oid */ |
f24e9980 SW |
245 | msg_size += 40; |
246 | if (snapc) | |
247 | msg_size += sizeof(u64) * snapc->num_snaps; | |
248 | if (use_mempool) | |
8f3bc053 | 249 | msg = ceph_msgpool_get(&osdc->msgpool_op, 0); |
f24e9980 | 250 | else |
3499e8a5 | 251 | msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags); |
a79832f2 | 252 | if (!msg) { |
f24e9980 | 253 | ceph_osdc_put_request(req); |
a79832f2 | 254 | return NULL; |
f24e9980 | 255 | } |
68b4476b | 256 | |
f24e9980 SW |
257 | msg->hdr.type = cpu_to_le16(CEPH_MSG_OSD_OP); |
258 | memset(msg->front.iov_base, 0, msg->front.iov_len); | |
3499e8a5 YS |
259 | |
260 | req->r_request = msg; | |
261 | req->r_pages = pages; | |
68b4476b YS |
262 | #ifdef CONFIG_BLOCK |
263 | if (bio) { | |
264 | req->r_bio = bio; | |
265 | bio_get(req->r_bio); | |
266 | } | |
267 | #endif | |
3499e8a5 YS |
268 | |
269 | return req; | |
270 | } | |
271 | ||
68b4476b YS |
272 | static void osd_req_encode_op(struct ceph_osd_request *req, |
273 | struct ceph_osd_op *dst, | |
274 | struct ceph_osd_req_op *src) | |
275 | { | |
276 | dst->op = cpu_to_le16(src->op); | |
277 | ||
278 | switch (dst->op) { | |
279 | case CEPH_OSD_OP_READ: | |
280 | case CEPH_OSD_OP_WRITE: | |
281 | dst->extent.offset = | |
282 | cpu_to_le64(src->extent.offset); | |
283 | dst->extent.length = | |
284 | cpu_to_le64(src->extent.length); | |
285 | dst->extent.truncate_size = | |
286 | cpu_to_le64(src->extent.truncate_size); | |
287 | dst->extent.truncate_seq = | |
288 | cpu_to_le32(src->extent.truncate_seq); | |
289 | break; | |
290 | ||
291 | case CEPH_OSD_OP_GETXATTR: | |
292 | case CEPH_OSD_OP_SETXATTR: | |
293 | case CEPH_OSD_OP_CMPXATTR: | |
294 | BUG_ON(!req->r_trail); | |
295 | ||
296 | dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); | |
297 | dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); | |
298 | dst->xattr.cmp_op = src->xattr.cmp_op; | |
299 | dst->xattr.cmp_mode = src->xattr.cmp_mode; | |
300 | ceph_pagelist_append(req->r_trail, src->xattr.name, | |
301 | src->xattr.name_len); | |
302 | ceph_pagelist_append(req->r_trail, src->xattr.val, | |
303 | src->xattr.value_len); | |
304 | break; | |
ae1533b6 YS |
305 | case CEPH_OSD_OP_CALL: |
306 | BUG_ON(!req->r_trail); | |
307 | ||
308 | dst->cls.class_len = src->cls.class_len; | |
309 | dst->cls.method_len = src->cls.method_len; | |
310 | dst->cls.indata_len = cpu_to_le32(src->cls.indata_len); | |
311 | ||
312 | ceph_pagelist_append(req->r_trail, src->cls.class_name, | |
313 | src->cls.class_len); | |
314 | ceph_pagelist_append(req->r_trail, src->cls.method_name, | |
315 | src->cls.method_len); | |
316 | ceph_pagelist_append(req->r_trail, src->cls.indata, | |
317 | src->cls.indata_len); | |
318 | break; | |
319 | case CEPH_OSD_OP_ROLLBACK: | |
320 | dst->snap.snapid = cpu_to_le64(src->snap.snapid); | |
321 | break; | |
68b4476b YS |
322 | case CEPH_OSD_OP_STARTSYNC: |
323 | break; | |
324 | default: | |
325 | pr_err("unrecognized osd opcode %d\n", dst->op); | |
326 | WARN_ON(1); | |
327 | break; | |
328 | } | |
329 | dst->payload_len = cpu_to_le32(src->payload_len); | |
330 | } | |
331 | ||
3499e8a5 YS |
332 | /* |
333 | * build new request AND message | |
334 | * | |
335 | */ | |
336 | void ceph_osdc_build_request(struct ceph_osd_request *req, | |
68b4476b YS |
337 | u64 off, u64 *plen, |
338 | struct ceph_osd_req_op *src_ops, | |
339 | struct ceph_snap_context *snapc, | |
340 | struct timespec *mtime, | |
341 | const char *oid, | |
342 | int oid_len) | |
3499e8a5 YS |
343 | { |
344 | struct ceph_msg *msg = req->r_request; | |
345 | struct ceph_osd_request_head *head; | |
68b4476b | 346 | struct ceph_osd_req_op *src_op; |
3499e8a5 YS |
347 | struct ceph_osd_op *op; |
348 | void *p; | |
68b4476b | 349 | int num_op = get_num_ops(src_ops, NULL); |
3499e8a5 | 350 | size_t msg_size = sizeof(*head) + num_op*sizeof(*op); |
3499e8a5 | 351 | int flags = req->r_flags; |
68b4476b YS |
352 | u64 data_len = 0; |
353 | int i; | |
3499e8a5 | 354 | |
f24e9980 SW |
355 | head = msg->front.iov_base; |
356 | op = (void *)(head + 1); | |
357 | p = (void *)(op + num_op); | |
358 | ||
f24e9980 SW |
359 | req->r_snapc = ceph_get_snap_context(snapc); |
360 | ||
361 | head->client_inc = cpu_to_le32(1); /* always, for now. */ | |
362 | head->flags = cpu_to_le32(flags); | |
363 | if (flags & CEPH_OSD_FLAG_WRITE) | |
364 | ceph_encode_timespec(&head->mtime, mtime); | |
365 | head->num_ops = cpu_to_le16(num_op); | |
f24e9980 | 366 | |
f24e9980 SW |
367 | |
368 | /* fill in oid */ | |
3499e8a5 YS |
369 | head->object_len = cpu_to_le32(oid_len); |
370 | memcpy(p, oid, oid_len); | |
371 | p += oid_len; | |
f24e9980 | 372 | |
68b4476b YS |
373 | src_op = src_ops; |
374 | while (src_op->op) { | |
375 | osd_req_encode_op(req, op, src_op); | |
376 | src_op++; | |
f24e9980 | 377 | op++; |
f24e9980 | 378 | } |
68b4476b YS |
379 | |
380 | if (req->r_trail) | |
381 | data_len += req->r_trail->length; | |
382 | ||
f24e9980 SW |
383 | if (snapc) { |
384 | head->snap_seq = cpu_to_le64(snapc->seq); | |
385 | head->num_snaps = cpu_to_le32(snapc->num_snaps); | |
386 | for (i = 0; i < snapc->num_snaps; i++) { | |
387 | put_unaligned_le64(snapc->snaps[i], p); | |
388 | p += sizeof(u64); | |
389 | } | |
390 | } | |
391 | ||
68b4476b YS |
392 | if (flags & CEPH_OSD_FLAG_WRITE) { |
393 | req->r_request->hdr.data_off = cpu_to_le16(off); | |
394 | req->r_request->hdr.data_len = cpu_to_le32(*plen + data_len); | |
395 | } else if (data_len) { | |
396 | req->r_request->hdr.data_off = 0; | |
397 | req->r_request->hdr.data_len = cpu_to_le32(data_len); | |
398 | } | |
399 | ||
f24e9980 | 400 | BUG_ON(p > msg->front.iov_base + msg->front.iov_len); |
6f863e71 SW |
401 | msg_size = p - msg->front.iov_base; |
402 | msg->front.iov_len = msg_size; | |
403 | msg->hdr.front_len = cpu_to_le32(msg_size); | |
3499e8a5 YS |
404 | return; |
405 | } | |
406 | ||
407 | /* | |
408 | * build new request AND message, calculate layout, and adjust file | |
409 | * extent as needed. | |
410 | * | |
411 | * if the file was recently truncated, we include information about its | |
412 | * old and new size so that the object can be updated appropriately. (we | |
413 | * avoid synchronously deleting truncated objects because it's slow.) | |
414 | * | |
415 | * if @do_sync, include a 'startsync' command so that the osd will flush | |
416 | * data quickly. | |
417 | */ | |
418 | struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, | |
419 | struct ceph_file_layout *layout, | |
420 | struct ceph_vino vino, | |
421 | u64 off, u64 *plen, | |
422 | int opcode, int flags, | |
423 | struct ceph_snap_context *snapc, | |
424 | int do_sync, | |
425 | u32 truncate_seq, | |
426 | u64 truncate_size, | |
427 | struct timespec *mtime, | |
428 | bool use_mempool, int num_reply) | |
429 | { | |
68b4476b YS |
430 | struct ceph_osd_req_op ops[3]; |
431 | struct ceph_osd_request *req; | |
432 | ||
433 | ops[0].op = opcode; | |
434 | ops[0].extent.truncate_seq = truncate_seq; | |
435 | ops[0].extent.truncate_size = truncate_size; | |
436 | ops[0].payload_len = 0; | |
437 | ||
438 | if (do_sync) { | |
439 | ops[1].op = CEPH_OSD_OP_STARTSYNC; | |
440 | ops[1].payload_len = 0; | |
441 | ops[2].op = 0; | |
442 | } else | |
443 | ops[1].op = 0; | |
444 | ||
445 | req = ceph_osdc_alloc_request(osdc, flags, | |
446 | snapc, ops, | |
3499e8a5 | 447 | use_mempool, |
68b4476b | 448 | GFP_NOFS, NULL, NULL); |
3499e8a5 YS |
449 | if (IS_ERR(req)) |
450 | return req; | |
451 | ||
452 | /* calculate max write size */ | |
68b4476b | 453 | calc_layout(osdc, vino, layout, off, plen, req, ops); |
3499e8a5 YS |
454 | req->r_file_layout = *layout; /* keep a copy */ |
455 | ||
68b4476b YS |
456 | ceph_osdc_build_request(req, off, plen, ops, |
457 | snapc, | |
3499e8a5 YS |
458 | mtime, |
459 | req->r_oid, req->r_oid_len); | |
460 | ||
f24e9980 SW |
461 | return req; |
462 | } | |
463 | ||
464 | /* | |
465 | * We keep osd requests in an rbtree, sorted by ->r_tid. | |
466 | */ | |
467 | static void __insert_request(struct ceph_osd_client *osdc, | |
468 | struct ceph_osd_request *new) | |
469 | { | |
470 | struct rb_node **p = &osdc->requests.rb_node; | |
471 | struct rb_node *parent = NULL; | |
472 | struct ceph_osd_request *req = NULL; | |
473 | ||
474 | while (*p) { | |
475 | parent = *p; | |
476 | req = rb_entry(parent, struct ceph_osd_request, r_node); | |
477 | if (new->r_tid < req->r_tid) | |
478 | p = &(*p)->rb_left; | |
479 | else if (new->r_tid > req->r_tid) | |
480 | p = &(*p)->rb_right; | |
481 | else | |
482 | BUG(); | |
483 | } | |
484 | ||
485 | rb_link_node(&new->r_node, parent, p); | |
486 | rb_insert_color(&new->r_node, &osdc->requests); | |
487 | } | |
488 | ||
489 | static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc, | |
490 | u64 tid) | |
491 | { | |
492 | struct ceph_osd_request *req; | |
493 | struct rb_node *n = osdc->requests.rb_node; | |
494 | ||
495 | while (n) { | |
496 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
497 | if (tid < req->r_tid) | |
498 | n = n->rb_left; | |
499 | else if (tid > req->r_tid) | |
500 | n = n->rb_right; | |
501 | else | |
502 | return req; | |
503 | } | |
504 | return NULL; | |
505 | } | |
506 | ||
507 | static struct ceph_osd_request * | |
508 | __lookup_request_ge(struct ceph_osd_client *osdc, | |
509 | u64 tid) | |
510 | { | |
511 | struct ceph_osd_request *req; | |
512 | struct rb_node *n = osdc->requests.rb_node; | |
513 | ||
514 | while (n) { | |
515 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
516 | if (tid < req->r_tid) { | |
517 | if (!n->rb_left) | |
518 | return req; | |
519 | n = n->rb_left; | |
520 | } else if (tid > req->r_tid) { | |
521 | n = n->rb_right; | |
522 | } else { | |
523 | return req; | |
524 | } | |
525 | } | |
526 | return NULL; | |
527 | } | |
528 | ||
529 | ||
530 | /* | |
81b024e7 | 531 | * If the osd connection drops, we need to resubmit all requests. |
f24e9980 SW |
532 | */ |
533 | static void osd_reset(struct ceph_connection *con) | |
534 | { | |
535 | struct ceph_osd *osd = con->private; | |
536 | struct ceph_osd_client *osdc; | |
537 | ||
538 | if (!osd) | |
539 | return; | |
540 | dout("osd_reset osd%d\n", osd->o_osd); | |
541 | osdc = osd->o_osdc; | |
f24e9980 SW |
542 | down_read(&osdc->map_sem); |
543 | kick_requests(osdc, osd); | |
544 | up_read(&osdc->map_sem); | |
545 | } | |
546 | ||
547 | /* | |
548 | * Track open sessions with osds. | |
549 | */ | |
550 | static struct ceph_osd *create_osd(struct ceph_osd_client *osdc) | |
551 | { | |
552 | struct ceph_osd *osd; | |
553 | ||
554 | osd = kzalloc(sizeof(*osd), GFP_NOFS); | |
555 | if (!osd) | |
556 | return NULL; | |
557 | ||
558 | atomic_set(&osd->o_ref, 1); | |
559 | osd->o_osdc = osdc; | |
560 | INIT_LIST_HEAD(&osd->o_requests); | |
f5a2041b | 561 | INIT_LIST_HEAD(&osd->o_osd_lru); |
f24e9980 SW |
562 | osd->o_incarnation = 1; |
563 | ||
564 | ceph_con_init(osdc->client->msgr, &osd->o_con); | |
565 | osd->o_con.private = osd; | |
566 | osd->o_con.ops = &osd_con_ops; | |
567 | osd->o_con.peer_name.type = CEPH_ENTITY_TYPE_OSD; | |
4e7a5dcd | 568 | |
422d2cb8 | 569 | INIT_LIST_HEAD(&osd->o_keepalive_item); |
f24e9980 SW |
570 | return osd; |
571 | } | |
572 | ||
573 | static struct ceph_osd *get_osd(struct ceph_osd *osd) | |
574 | { | |
575 | if (atomic_inc_not_zero(&osd->o_ref)) { | |
576 | dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1, | |
577 | atomic_read(&osd->o_ref)); | |
578 | return osd; | |
579 | } else { | |
580 | dout("get_osd %p FAIL\n", osd); | |
581 | return NULL; | |
582 | } | |
583 | } | |
584 | ||
585 | static void put_osd(struct ceph_osd *osd) | |
586 | { | |
587 | dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref), | |
588 | atomic_read(&osd->o_ref) - 1); | |
79494d1b SW |
589 | if (atomic_dec_and_test(&osd->o_ref)) { |
590 | struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth; | |
591 | ||
592 | if (osd->o_authorizer) | |
593 | ac->ops->destroy_authorizer(ac, osd->o_authorizer); | |
f24e9980 | 594 | kfree(osd); |
79494d1b | 595 | } |
f24e9980 SW |
596 | } |
597 | ||
598 | /* | |
599 | * remove an osd from our map | |
600 | */ | |
f5a2041b | 601 | static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) |
f24e9980 | 602 | { |
f5a2041b | 603 | dout("__remove_osd %p\n", osd); |
f24e9980 SW |
604 | BUG_ON(!list_empty(&osd->o_requests)); |
605 | rb_erase(&osd->o_node, &osdc->osds); | |
f5a2041b | 606 | list_del_init(&osd->o_osd_lru); |
f24e9980 SW |
607 | ceph_con_close(&osd->o_con); |
608 | put_osd(osd); | |
609 | } | |
610 | ||
f5a2041b YS |
611 | static void __move_osd_to_lru(struct ceph_osd_client *osdc, |
612 | struct ceph_osd *osd) | |
613 | { | |
614 | dout("__move_osd_to_lru %p\n", osd); | |
615 | BUG_ON(!list_empty(&osd->o_osd_lru)); | |
616 | list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); | |
617 | osd->lru_ttl = jiffies + osdc->client->mount_args->osd_idle_ttl * HZ; | |
618 | } | |
619 | ||
620 | static void __remove_osd_from_lru(struct ceph_osd *osd) | |
621 | { | |
622 | dout("__remove_osd_from_lru %p\n", osd); | |
623 | if (!list_empty(&osd->o_osd_lru)) | |
624 | list_del_init(&osd->o_osd_lru); | |
625 | } | |
626 | ||
627 | static void remove_old_osds(struct ceph_osd_client *osdc, int remove_all) | |
628 | { | |
629 | struct ceph_osd *osd, *nosd; | |
630 | ||
631 | dout("__remove_old_osds %p\n", osdc); | |
632 | mutex_lock(&osdc->request_mutex); | |
633 | list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { | |
634 | if (!remove_all && time_before(jiffies, osd->lru_ttl)) | |
635 | break; | |
636 | __remove_osd(osdc, osd); | |
637 | } | |
638 | mutex_unlock(&osdc->request_mutex); | |
639 | } | |
640 | ||
f24e9980 SW |
641 | /* |
642 | * reset osd connect | |
643 | */ | |
f5a2041b | 644 | static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) |
f24e9980 | 645 | { |
87b315a5 | 646 | struct ceph_osd_request *req; |
f24e9980 SW |
647 | int ret = 0; |
648 | ||
f5a2041b | 649 | dout("__reset_osd %p osd%d\n", osd, osd->o_osd); |
f24e9980 | 650 | if (list_empty(&osd->o_requests)) { |
f5a2041b | 651 | __remove_osd(osdc, osd); |
87b315a5 SW |
652 | } else if (memcmp(&osdc->osdmap->osd_addr[osd->o_osd], |
653 | &osd->o_con.peer_addr, | |
654 | sizeof(osd->o_con.peer_addr)) == 0 && | |
655 | !ceph_con_opened(&osd->o_con)) { | |
656 | dout(" osd addr hasn't changed and connection never opened," | |
657 | " letting msgr retry"); | |
658 | /* touch each r_stamp for handle_timeout()'s benfit */ | |
659 | list_for_each_entry(req, &osd->o_requests, r_osd_item) | |
660 | req->r_stamp = jiffies; | |
661 | ret = -EAGAIN; | |
f24e9980 SW |
662 | } else { |
663 | ceph_con_close(&osd->o_con); | |
664 | ceph_con_open(&osd->o_con, &osdc->osdmap->osd_addr[osd->o_osd]); | |
665 | osd->o_incarnation++; | |
666 | } | |
667 | return ret; | |
668 | } | |
669 | ||
670 | static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new) | |
671 | { | |
672 | struct rb_node **p = &osdc->osds.rb_node; | |
673 | struct rb_node *parent = NULL; | |
674 | struct ceph_osd *osd = NULL; | |
675 | ||
676 | while (*p) { | |
677 | parent = *p; | |
678 | osd = rb_entry(parent, struct ceph_osd, o_node); | |
679 | if (new->o_osd < osd->o_osd) | |
680 | p = &(*p)->rb_left; | |
681 | else if (new->o_osd > osd->o_osd) | |
682 | p = &(*p)->rb_right; | |
683 | else | |
684 | BUG(); | |
685 | } | |
686 | ||
687 | rb_link_node(&new->o_node, parent, p); | |
688 | rb_insert_color(&new->o_node, &osdc->osds); | |
689 | } | |
690 | ||
691 | static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o) | |
692 | { | |
693 | struct ceph_osd *osd; | |
694 | struct rb_node *n = osdc->osds.rb_node; | |
695 | ||
696 | while (n) { | |
697 | osd = rb_entry(n, struct ceph_osd, o_node); | |
698 | if (o < osd->o_osd) | |
699 | n = n->rb_left; | |
700 | else if (o > osd->o_osd) | |
701 | n = n->rb_right; | |
702 | else | |
703 | return osd; | |
704 | } | |
705 | return NULL; | |
706 | } | |
707 | ||
422d2cb8 YS |
708 | static void __schedule_osd_timeout(struct ceph_osd_client *osdc) |
709 | { | |
710 | schedule_delayed_work(&osdc->timeout_work, | |
711 | osdc->client->mount_args->osd_keepalive_timeout * HZ); | |
712 | } | |
713 | ||
714 | static void __cancel_osd_timeout(struct ceph_osd_client *osdc) | |
715 | { | |
716 | cancel_delayed_work(&osdc->timeout_work); | |
717 | } | |
f24e9980 SW |
718 | |
719 | /* | |
720 | * Register request, assign tid. If this is the first request, set up | |
721 | * the timeout event. | |
722 | */ | |
723 | static void register_request(struct ceph_osd_client *osdc, | |
724 | struct ceph_osd_request *req) | |
725 | { | |
f24e9980 SW |
726 | mutex_lock(&osdc->request_mutex); |
727 | req->r_tid = ++osdc->last_tid; | |
6df058c0 | 728 | req->r_request->hdr.tid = cpu_to_le64(req->r_tid); |
422d2cb8 | 729 | INIT_LIST_HEAD(&req->r_req_lru_item); |
f24e9980 SW |
730 | |
731 | dout("register_request %p tid %lld\n", req, req->r_tid); | |
732 | __insert_request(osdc, req); | |
733 | ceph_osdc_get_request(req); | |
734 | osdc->num_requests++; | |
735 | ||
f24e9980 | 736 | if (osdc->num_requests == 1) { |
422d2cb8 YS |
737 | dout(" first request, scheduling timeout\n"); |
738 | __schedule_osd_timeout(osdc); | |
f24e9980 SW |
739 | } |
740 | mutex_unlock(&osdc->request_mutex); | |
741 | } | |
742 | ||
743 | /* | |
744 | * called under osdc->request_mutex | |
745 | */ | |
746 | static void __unregister_request(struct ceph_osd_client *osdc, | |
747 | struct ceph_osd_request *req) | |
748 | { | |
749 | dout("__unregister_request %p tid %lld\n", req, req->r_tid); | |
750 | rb_erase(&req->r_node, &osdc->requests); | |
751 | osdc->num_requests--; | |
752 | ||
0ba6478d SW |
753 | if (req->r_osd) { |
754 | /* make sure the original request isn't in flight. */ | |
755 | ceph_con_revoke(&req->r_osd->o_con, req->r_request); | |
756 | ||
757 | list_del_init(&req->r_osd_item); | |
758 | if (list_empty(&req->r_osd->o_requests)) | |
f5a2041b | 759 | __move_osd_to_lru(osdc, req->r_osd); |
0ba6478d SW |
760 | req->r_osd = NULL; |
761 | } | |
f24e9980 SW |
762 | |
763 | ceph_osdc_put_request(req); | |
764 | ||
422d2cb8 YS |
765 | list_del_init(&req->r_req_lru_item); |
766 | if (osdc->num_requests == 0) { | |
767 | dout(" no requests, canceling timeout\n"); | |
768 | __cancel_osd_timeout(osdc); | |
f24e9980 SW |
769 | } |
770 | } | |
771 | ||
772 | /* | |
773 | * Cancel a previously queued request message | |
774 | */ | |
775 | static void __cancel_request(struct ceph_osd_request *req) | |
776 | { | |
6bc18876 | 777 | if (req->r_sent && req->r_osd) { |
f24e9980 SW |
778 | ceph_con_revoke(&req->r_osd->o_con, req->r_request); |
779 | req->r_sent = 0; | |
780 | } | |
422d2cb8 | 781 | list_del_init(&req->r_req_lru_item); |
f24e9980 SW |
782 | } |
783 | ||
784 | /* | |
785 | * Pick an osd (the first 'up' osd in the pg), allocate the osd struct | |
786 | * (as needed), and set the request r_osd appropriately. If there is | |
787 | * no up osd, set r_osd to NULL. | |
788 | * | |
789 | * Return 0 if unchanged, 1 if changed, or negative on error. | |
790 | * | |
791 | * Caller should hold map_sem for read and request_mutex. | |
792 | */ | |
793 | static int __map_osds(struct ceph_osd_client *osdc, | |
794 | struct ceph_osd_request *req) | |
795 | { | |
796 | struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base; | |
51042122 | 797 | struct ceph_pg pgid; |
d85b7056 SW |
798 | int acting[CEPH_PG_MAX_SIZE]; |
799 | int o = -1, num = 0; | |
f24e9980 | 800 | int err; |
f24e9980 SW |
801 | |
802 | dout("map_osds %p tid %lld\n", req, req->r_tid); | |
803 | err = ceph_calc_object_layout(&reqhead->layout, req->r_oid, | |
804 | &req->r_file_layout, osdc->osdmap); | |
805 | if (err) | |
806 | return err; | |
51042122 | 807 | pgid = reqhead->layout.ol_pgid; |
7740a42f SW |
808 | req->r_pgid = pgid; |
809 | ||
d85b7056 SW |
810 | err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting); |
811 | if (err > 0) { | |
812 | o = acting[0]; | |
813 | num = err; | |
814 | } | |
f24e9980 SW |
815 | |
816 | if ((req->r_osd && req->r_osd->o_osd == o && | |
d85b7056 SW |
817 | req->r_sent >= req->r_osd->o_incarnation && |
818 | req->r_num_pg_osds == num && | |
819 | memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) || | |
f24e9980 SW |
820 | (req->r_osd == NULL && o == -1)) |
821 | return 0; /* no change */ | |
822 | ||
51042122 SW |
823 | dout("map_osds tid %llu pgid %d.%x osd%d (was osd%d)\n", |
824 | req->r_tid, le32_to_cpu(pgid.pool), le16_to_cpu(pgid.ps), o, | |
f24e9980 SW |
825 | req->r_osd ? req->r_osd->o_osd : -1); |
826 | ||
d85b7056 SW |
827 | /* record full pg acting set */ |
828 | memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num); | |
829 | req->r_num_pg_osds = num; | |
830 | ||
f24e9980 SW |
831 | if (req->r_osd) { |
832 | __cancel_request(req); | |
833 | list_del_init(&req->r_osd_item); | |
f24e9980 SW |
834 | req->r_osd = NULL; |
835 | } | |
836 | ||
837 | req->r_osd = __lookup_osd(osdc, o); | |
838 | if (!req->r_osd && o >= 0) { | |
c99eb1c7 SW |
839 | err = -ENOMEM; |
840 | req->r_osd = create_osd(osdc); | |
841 | if (!req->r_osd) | |
842 | goto out; | |
f24e9980 SW |
843 | |
844 | dout("map_osds osd %p is osd%d\n", req->r_osd, o); | |
845 | req->r_osd->o_osd = o; | |
846 | req->r_osd->o_con.peer_name.num = cpu_to_le64(o); | |
847 | __insert_osd(osdc, req->r_osd); | |
848 | ||
849 | ceph_con_open(&req->r_osd->o_con, &osdc->osdmap->osd_addr[o]); | |
850 | } | |
851 | ||
f5a2041b YS |
852 | if (req->r_osd) { |
853 | __remove_osd_from_lru(req->r_osd); | |
f24e9980 | 854 | list_add(&req->r_osd_item, &req->r_osd->o_requests); |
f5a2041b | 855 | } |
d85b7056 | 856 | err = 1; /* osd or pg changed */ |
f24e9980 SW |
857 | |
858 | out: | |
f24e9980 SW |
859 | return err; |
860 | } | |
861 | ||
862 | /* | |
863 | * caller should hold map_sem (for read) and request_mutex | |
864 | */ | |
865 | static int __send_request(struct ceph_osd_client *osdc, | |
866 | struct ceph_osd_request *req) | |
867 | { | |
868 | struct ceph_osd_request_head *reqhead; | |
869 | int err; | |
870 | ||
871 | err = __map_osds(osdc, req); | |
872 | if (err < 0) | |
873 | return err; | |
874 | if (req->r_osd == NULL) { | |
875 | dout("send_request %p no up osds in pg\n", req); | |
876 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
877 | return 0; | |
878 | } | |
879 | ||
880 | dout("send_request %p tid %llu to osd%d flags %d\n", | |
881 | req, req->r_tid, req->r_osd->o_osd, req->r_flags); | |
882 | ||
883 | reqhead = req->r_request->front.iov_base; | |
884 | reqhead->osdmap_epoch = cpu_to_le32(osdc->osdmap->epoch); | |
885 | reqhead->flags |= cpu_to_le32(req->r_flags); /* e.g., RETRY */ | |
886 | reqhead->reassert_version = req->r_reassert_version; | |
887 | ||
3dd72fc0 | 888 | req->r_stamp = jiffies; |
07a27e22 | 889 | list_move_tail(&req->r_req_lru_item, &osdc->req_lru); |
f24e9980 SW |
890 | |
891 | ceph_msg_get(req->r_request); /* send consumes a ref */ | |
892 | ceph_con_send(&req->r_osd->o_con, req->r_request); | |
893 | req->r_sent = req->r_osd->o_incarnation; | |
894 | return 0; | |
895 | } | |
896 | ||
897 | /* | |
898 | * Timeout callback, called every N seconds when 1 or more osd | |
899 | * requests has been active for more than N seconds. When this | |
900 | * happens, we ping all OSDs with requests who have timed out to | |
901 | * ensure any communications channel reset is detected. Reset the | |
902 | * request timeouts another N seconds in the future as we go. | |
903 | * Reschedule the timeout event another N seconds in future (unless | |
904 | * there are no open requests). | |
905 | */ | |
906 | static void handle_timeout(struct work_struct *work) | |
907 | { | |
908 | struct ceph_osd_client *osdc = | |
909 | container_of(work, struct ceph_osd_client, timeout_work.work); | |
422d2cb8 | 910 | struct ceph_osd_request *req, *last_req = NULL; |
f24e9980 | 911 | struct ceph_osd *osd; |
6b805185 | 912 | unsigned long timeout = osdc->client->mount_args->osd_timeout * HZ; |
422d2cb8 YS |
913 | unsigned long keepalive = |
914 | osdc->client->mount_args->osd_keepalive_timeout * HZ; | |
3dd72fc0 | 915 | unsigned long last_stamp = 0; |
f24e9980 | 916 | struct rb_node *p; |
422d2cb8 | 917 | struct list_head slow_osds; |
f24e9980 SW |
918 | |
919 | dout("timeout\n"); | |
920 | down_read(&osdc->map_sem); | |
921 | ||
922 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
923 | ||
924 | mutex_lock(&osdc->request_mutex); | |
925 | for (p = rb_first(&osdc->requests); p; p = rb_next(p)) { | |
926 | req = rb_entry(p, struct ceph_osd_request, r_node); | |
927 | ||
928 | if (req->r_resend) { | |
929 | int err; | |
930 | ||
931 | dout("osdc resending prev failed %lld\n", req->r_tid); | |
932 | err = __send_request(osdc, req); | |
933 | if (err) | |
934 | dout("osdc failed again on %lld\n", req->r_tid); | |
935 | else | |
936 | req->r_resend = false; | |
937 | continue; | |
938 | } | |
939 | } | |
f24e9980 | 940 | |
422d2cb8 YS |
941 | /* |
942 | * reset osds that appear to be _really_ unresponsive. this | |
943 | * is a failsafe measure.. we really shouldn't be getting to | |
944 | * this point if the system is working properly. the monitors | |
945 | * should mark the osd as failed and we should find out about | |
946 | * it from an updated osd map. | |
947 | */ | |
f26e681d | 948 | while (timeout && !list_empty(&osdc->req_lru)) { |
422d2cb8 YS |
949 | req = list_entry(osdc->req_lru.next, struct ceph_osd_request, |
950 | r_req_lru_item); | |
951 | ||
3dd72fc0 | 952 | if (time_before(jiffies, req->r_stamp + timeout)) |
422d2cb8 YS |
953 | break; |
954 | ||
3dd72fc0 | 955 | BUG_ON(req == last_req && req->r_stamp == last_stamp); |
422d2cb8 | 956 | last_req = req; |
3dd72fc0 | 957 | last_stamp = req->r_stamp; |
422d2cb8 YS |
958 | |
959 | osd = req->r_osd; | |
960 | BUG_ON(!osd); | |
961 | pr_warning(" tid %llu timed out on osd%d, will reset osd\n", | |
962 | req->r_tid, osd->o_osd); | |
963 | __kick_requests(osdc, osd); | |
964 | } | |
965 | ||
966 | /* | |
967 | * ping osds that are a bit slow. this ensures that if there | |
968 | * is a break in the TCP connection we will notice, and reopen | |
969 | * a connection with that osd (from the fault callback). | |
970 | */ | |
971 | INIT_LIST_HEAD(&slow_osds); | |
972 | list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) { | |
3dd72fc0 | 973 | if (time_before(jiffies, req->r_stamp + keepalive)) |
422d2cb8 YS |
974 | break; |
975 | ||
976 | osd = req->r_osd; | |
977 | BUG_ON(!osd); | |
978 | dout(" tid %llu is slow, will send keepalive on osd%d\n", | |
f24e9980 | 979 | req->r_tid, osd->o_osd); |
422d2cb8 YS |
980 | list_move_tail(&osd->o_keepalive_item, &slow_osds); |
981 | } | |
982 | while (!list_empty(&slow_osds)) { | |
983 | osd = list_entry(slow_osds.next, struct ceph_osd, | |
984 | o_keepalive_item); | |
985 | list_del_init(&osd->o_keepalive_item); | |
f24e9980 SW |
986 | ceph_con_keepalive(&osd->o_con); |
987 | } | |
988 | ||
422d2cb8 | 989 | __schedule_osd_timeout(osdc); |
f24e9980 SW |
990 | mutex_unlock(&osdc->request_mutex); |
991 | ||
992 | up_read(&osdc->map_sem); | |
993 | } | |
994 | ||
f5a2041b YS |
995 | static void handle_osds_timeout(struct work_struct *work) |
996 | { | |
997 | struct ceph_osd_client *osdc = | |
998 | container_of(work, struct ceph_osd_client, | |
999 | osds_timeout_work.work); | |
1000 | unsigned long delay = | |
1001 | osdc->client->mount_args->osd_idle_ttl * HZ >> 2; | |
1002 | ||
1003 | dout("osds timeout\n"); | |
1004 | down_read(&osdc->map_sem); | |
1005 | remove_old_osds(osdc, 0); | |
1006 | up_read(&osdc->map_sem); | |
1007 | ||
1008 | schedule_delayed_work(&osdc->osds_timeout_work, | |
1009 | round_jiffies_relative(delay)); | |
1010 | } | |
1011 | ||
f24e9980 SW |
1012 | /* |
1013 | * handle osd op reply. either call the callback if it is specified, | |
1014 | * or do the completion to wake up the waiting thread. | |
1015 | */ | |
350b1c32 SW |
1016 | static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg, |
1017 | struct ceph_connection *con) | |
f24e9980 SW |
1018 | { |
1019 | struct ceph_osd_reply_head *rhead = msg->front.iov_base; | |
1020 | struct ceph_osd_request *req; | |
1021 | u64 tid; | |
1022 | int numops, object_len, flags; | |
0ceed5db | 1023 | s32 result; |
f24e9980 | 1024 | |
6df058c0 | 1025 | tid = le64_to_cpu(msg->hdr.tid); |
f24e9980 SW |
1026 | if (msg->front.iov_len < sizeof(*rhead)) |
1027 | goto bad; | |
f24e9980 SW |
1028 | numops = le32_to_cpu(rhead->num_ops); |
1029 | object_len = le32_to_cpu(rhead->object_len); | |
0ceed5db | 1030 | result = le32_to_cpu(rhead->result); |
f24e9980 SW |
1031 | if (msg->front.iov_len != sizeof(*rhead) + object_len + |
1032 | numops * sizeof(struct ceph_osd_op)) | |
1033 | goto bad; | |
0ceed5db | 1034 | dout("handle_reply %p tid %llu result %d\n", msg, tid, (int)result); |
f24e9980 SW |
1035 | |
1036 | /* lookup */ | |
1037 | mutex_lock(&osdc->request_mutex); | |
1038 | req = __lookup_request(osdc, tid); | |
1039 | if (req == NULL) { | |
1040 | dout("handle_reply tid %llu dne\n", tid); | |
1041 | mutex_unlock(&osdc->request_mutex); | |
1042 | return; | |
1043 | } | |
1044 | ceph_osdc_get_request(req); | |
1045 | flags = le32_to_cpu(rhead->flags); | |
1046 | ||
350b1c32 | 1047 | /* |
0d59ab81 | 1048 | * if this connection filled our message, drop our reference now, to |
350b1c32 SW |
1049 | * avoid a (safe but slower) revoke later. |
1050 | */ | |
0d59ab81 | 1051 | if (req->r_con_filling_msg == con && req->r_reply == msg) { |
c16e7869 | 1052 | dout(" dropping con_filling_msg ref %p\n", con); |
0d59ab81 | 1053 | req->r_con_filling_msg = NULL; |
350b1c32 SW |
1054 | ceph_con_put(con); |
1055 | } | |
1056 | ||
f24e9980 SW |
1057 | if (!req->r_got_reply) { |
1058 | unsigned bytes; | |
1059 | ||
1060 | req->r_result = le32_to_cpu(rhead->result); | |
1061 | bytes = le32_to_cpu(msg->hdr.data_len); | |
1062 | dout("handle_reply result %d bytes %d\n", req->r_result, | |
1063 | bytes); | |
1064 | if (req->r_result == 0) | |
1065 | req->r_result = bytes; | |
1066 | ||
1067 | /* in case this is a write and we need to replay, */ | |
1068 | req->r_reassert_version = rhead->reassert_version; | |
1069 | ||
1070 | req->r_got_reply = 1; | |
1071 | } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) { | |
1072 | dout("handle_reply tid %llu dup ack\n", tid); | |
34b43a56 | 1073 | mutex_unlock(&osdc->request_mutex); |
f24e9980 SW |
1074 | goto done; |
1075 | } | |
1076 | ||
1077 | dout("handle_reply tid %llu flags %d\n", tid, flags); | |
1078 | ||
1079 | /* either this is a read, or we got the safe response */ | |
0ceed5db SW |
1080 | if (result < 0 || |
1081 | (flags & CEPH_OSD_FLAG_ONDISK) || | |
f24e9980 SW |
1082 | ((flags & CEPH_OSD_FLAG_WRITE) == 0)) |
1083 | __unregister_request(osdc, req); | |
1084 | ||
1085 | mutex_unlock(&osdc->request_mutex); | |
1086 | ||
1087 | if (req->r_callback) | |
1088 | req->r_callback(req, msg); | |
1089 | else | |
03066f23 | 1090 | complete_all(&req->r_completion); |
f24e9980 SW |
1091 | |
1092 | if (flags & CEPH_OSD_FLAG_ONDISK) { | |
1093 | if (req->r_safe_callback) | |
1094 | req->r_safe_callback(req, msg); | |
03066f23 | 1095 | complete_all(&req->r_safe_completion); /* fsync waiter */ |
f24e9980 SW |
1096 | } |
1097 | ||
1098 | done: | |
1099 | ceph_osdc_put_request(req); | |
1100 | return; | |
1101 | ||
1102 | bad: | |
1103 | pr_err("corrupt osd_op_reply got %d %d expected %d\n", | |
1104 | (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len), | |
1105 | (int)sizeof(*rhead)); | |
9ec7cab1 | 1106 | ceph_msg_dump(msg); |
f24e9980 SW |
1107 | } |
1108 | ||
1109 | ||
422d2cb8 | 1110 | static int __kick_requests(struct ceph_osd_client *osdc, |
f24e9980 SW |
1111 | struct ceph_osd *kickosd) |
1112 | { | |
1113 | struct ceph_osd_request *req; | |
1114 | struct rb_node *p, *n; | |
1115 | int needmap = 0; | |
1116 | int err; | |
1117 | ||
1118 | dout("kick_requests osd%d\n", kickosd ? kickosd->o_osd : -1); | |
153a008b | 1119 | if (kickosd) { |
87b315a5 SW |
1120 | err = __reset_osd(osdc, kickosd); |
1121 | if (err == -EAGAIN) | |
1122 | return 1; | |
153a008b | 1123 | } else { |
f24e9980 SW |
1124 | for (p = rb_first(&osdc->osds); p; p = n) { |
1125 | struct ceph_osd *osd = | |
1126 | rb_entry(p, struct ceph_osd, o_node); | |
1127 | ||
1128 | n = rb_next(p); | |
1129 | if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || | |
103e2d3a SW |
1130 | memcmp(&osd->o_con.peer_addr, |
1131 | ceph_osd_addr(osdc->osdmap, | |
1132 | osd->o_osd), | |
1133 | sizeof(struct ceph_entity_addr)) != 0) | |
f5a2041b | 1134 | __reset_osd(osdc, osd); |
f24e9980 SW |
1135 | } |
1136 | } | |
1137 | ||
1138 | for (p = rb_first(&osdc->requests); p; p = rb_next(p)) { | |
1139 | req = rb_entry(p, struct ceph_osd_request, r_node); | |
1140 | ||
1141 | if (req->r_resend) { | |
1142 | dout(" r_resend set on tid %llu\n", req->r_tid); | |
266673db | 1143 | __cancel_request(req); |
f24e9980 SW |
1144 | goto kick; |
1145 | } | |
266673db SW |
1146 | if (req->r_osd && kickosd == req->r_osd) { |
1147 | __cancel_request(req); | |
f24e9980 | 1148 | goto kick; |
266673db | 1149 | } |
f24e9980 SW |
1150 | |
1151 | err = __map_osds(osdc, req); | |
1152 | if (err == 0) | |
1153 | continue; /* no change */ | |
1154 | if (err < 0) { | |
1155 | /* | |
1156 | * FIXME: really, we should set the request | |
1157 | * error and fail if this isn't a 'nofail' | |
1158 | * request, but that's a fair bit more | |
1159 | * complicated to do. So retry! | |
1160 | */ | |
1161 | dout(" setting r_resend on %llu\n", req->r_tid); | |
1162 | req->r_resend = true; | |
1163 | continue; | |
1164 | } | |
1165 | if (req->r_osd == NULL) { | |
1166 | dout("tid %llu maps to no valid osd\n", req->r_tid); | |
1167 | needmap++; /* request a newer map */ | |
1168 | continue; | |
1169 | } | |
1170 | ||
1171 | kick: | |
c1ea8823 | 1172 | dout("kicking %p tid %llu osd%d\n", req, req->r_tid, |
12eadc19 | 1173 | req->r_osd ? req->r_osd->o_osd : -1); |
f24e9980 SW |
1174 | req->r_flags |= CEPH_OSD_FLAG_RETRY; |
1175 | err = __send_request(osdc, req); | |
1176 | if (err) { | |
1177 | dout(" setting r_resend on %llu\n", req->r_tid); | |
1178 | req->r_resend = true; | |
1179 | } | |
1180 | } | |
422d2cb8 YS |
1181 | |
1182 | return needmap; | |
1183 | } | |
1184 | ||
1185 | /* | |
1186 | * Resubmit osd requests whose osd or osd address has changed. Request | |
1187 | * a new osd map if osds are down, or we are otherwise unable to determine | |
1188 | * how to direct a request. | |
1189 | * | |
1190 | * Close connections to down osds. | |
1191 | * | |
1192 | * If @who is specified, resubmit requests for that specific osd. | |
1193 | * | |
1194 | * Caller should hold map_sem for read and request_mutex. | |
1195 | */ | |
1196 | static void kick_requests(struct ceph_osd_client *osdc, | |
1197 | struct ceph_osd *kickosd) | |
1198 | { | |
1199 | int needmap; | |
1200 | ||
1201 | mutex_lock(&osdc->request_mutex); | |
1202 | needmap = __kick_requests(osdc, kickosd); | |
f24e9980 SW |
1203 | mutex_unlock(&osdc->request_mutex); |
1204 | ||
1205 | if (needmap) { | |
1206 | dout("%d requests for down osds, need new map\n", needmap); | |
1207 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1208 | } | |
f24e9980 | 1209 | |
422d2cb8 | 1210 | } |
f24e9980 SW |
1211 | /* |
1212 | * Process updated osd map. | |
1213 | * | |
1214 | * The message contains any number of incremental and full maps, normally | |
1215 | * indicating some sort of topology change in the cluster. Kick requests | |
1216 | * off to different OSDs as needed. | |
1217 | */ | |
1218 | void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) | |
1219 | { | |
1220 | void *p, *end, *next; | |
1221 | u32 nr_maps, maplen; | |
1222 | u32 epoch; | |
1223 | struct ceph_osdmap *newmap = NULL, *oldmap; | |
1224 | int err; | |
1225 | struct ceph_fsid fsid; | |
1226 | ||
1227 | dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0); | |
1228 | p = msg->front.iov_base; | |
1229 | end = p + msg->front.iov_len; | |
1230 | ||
1231 | /* verify fsid */ | |
1232 | ceph_decode_need(&p, end, sizeof(fsid), bad); | |
1233 | ceph_decode_copy(&p, &fsid, sizeof(fsid)); | |
0743304d SW |
1234 | if (ceph_check_fsid(osdc->client, &fsid) < 0) |
1235 | return; | |
f24e9980 SW |
1236 | |
1237 | down_write(&osdc->map_sem); | |
1238 | ||
1239 | /* incremental maps */ | |
1240 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
1241 | dout(" %d inc maps\n", nr_maps); | |
1242 | while (nr_maps > 0) { | |
1243 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
1244 | epoch = ceph_decode_32(&p); |
1245 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
1246 | ceph_decode_need(&p, end, maplen, bad); |
1247 | next = p + maplen; | |
1248 | if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) { | |
1249 | dout("applying incremental map %u len %d\n", | |
1250 | epoch, maplen); | |
1251 | newmap = osdmap_apply_incremental(&p, next, | |
1252 | osdc->osdmap, | |
1253 | osdc->client->msgr); | |
1254 | if (IS_ERR(newmap)) { | |
1255 | err = PTR_ERR(newmap); | |
1256 | goto bad; | |
1257 | } | |
30dc6381 | 1258 | BUG_ON(!newmap); |
f24e9980 SW |
1259 | if (newmap != osdc->osdmap) { |
1260 | ceph_osdmap_destroy(osdc->osdmap); | |
1261 | osdc->osdmap = newmap; | |
1262 | } | |
1263 | } else { | |
1264 | dout("ignoring incremental map %u len %d\n", | |
1265 | epoch, maplen); | |
1266 | } | |
1267 | p = next; | |
1268 | nr_maps--; | |
1269 | } | |
1270 | if (newmap) | |
1271 | goto done; | |
1272 | ||
1273 | /* full maps */ | |
1274 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
1275 | dout(" %d full maps\n", nr_maps); | |
1276 | while (nr_maps) { | |
1277 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
1278 | epoch = ceph_decode_32(&p); |
1279 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
1280 | ceph_decode_need(&p, end, maplen, bad); |
1281 | if (nr_maps > 1) { | |
1282 | dout("skipping non-latest full map %u len %d\n", | |
1283 | epoch, maplen); | |
1284 | } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) { | |
1285 | dout("skipping full map %u len %d, " | |
1286 | "older than our %u\n", epoch, maplen, | |
1287 | osdc->osdmap->epoch); | |
1288 | } else { | |
1289 | dout("taking full map %u len %d\n", epoch, maplen); | |
1290 | newmap = osdmap_decode(&p, p+maplen); | |
1291 | if (IS_ERR(newmap)) { | |
1292 | err = PTR_ERR(newmap); | |
1293 | goto bad; | |
1294 | } | |
30dc6381 | 1295 | BUG_ON(!newmap); |
f24e9980 SW |
1296 | oldmap = osdc->osdmap; |
1297 | osdc->osdmap = newmap; | |
1298 | if (oldmap) | |
1299 | ceph_osdmap_destroy(oldmap); | |
1300 | } | |
1301 | p += maplen; | |
1302 | nr_maps--; | |
1303 | } | |
1304 | ||
1305 | done: | |
1306 | downgrade_write(&osdc->map_sem); | |
1307 | ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch); | |
1308 | if (newmap) | |
1309 | kick_requests(osdc, NULL); | |
1310 | up_read(&osdc->map_sem); | |
03066f23 | 1311 | wake_up_all(&osdc->client->auth_wq); |
f24e9980 SW |
1312 | return; |
1313 | ||
1314 | bad: | |
1315 | pr_err("osdc handle_map corrupt msg\n"); | |
9ec7cab1 | 1316 | ceph_msg_dump(msg); |
f24e9980 SW |
1317 | up_write(&osdc->map_sem); |
1318 | return; | |
1319 | } | |
1320 | ||
f24e9980 SW |
1321 | /* |
1322 | * Register request, send initial attempt. | |
1323 | */ | |
1324 | int ceph_osdc_start_request(struct ceph_osd_client *osdc, | |
1325 | struct ceph_osd_request *req, | |
1326 | bool nofail) | |
1327 | { | |
c1ea8823 | 1328 | int rc = 0; |
f24e9980 SW |
1329 | |
1330 | req->r_request->pages = req->r_pages; | |
1331 | req->r_request->nr_pages = req->r_num_pages; | |
68b4476b YS |
1332 | #ifdef CONFIG_BLOCK |
1333 | req->r_request->bio = req->r_bio; | |
1334 | #endif | |
1335 | req->r_request->trail = req->r_trail; | |
f24e9980 SW |
1336 | |
1337 | register_request(osdc, req); | |
1338 | ||
1339 | down_read(&osdc->map_sem); | |
1340 | mutex_lock(&osdc->request_mutex); | |
c1ea8823 SW |
1341 | /* |
1342 | * a racing kick_requests() may have sent the message for us | |
1343 | * while we dropped request_mutex above, so only send now if | |
1344 | * the request still han't been touched yet. | |
1345 | */ | |
1346 | if (req->r_sent == 0) { | |
1347 | rc = __send_request(osdc, req); | |
1348 | if (rc) { | |
1349 | if (nofail) { | |
1350 | dout("osdc_start_request failed send, " | |
1351 | " marking %lld\n", req->r_tid); | |
1352 | req->r_resend = true; | |
1353 | rc = 0; | |
1354 | } else { | |
1355 | __unregister_request(osdc, req); | |
1356 | } | |
f24e9980 SW |
1357 | } |
1358 | } | |
1359 | mutex_unlock(&osdc->request_mutex); | |
1360 | up_read(&osdc->map_sem); | |
1361 | return rc; | |
1362 | } | |
1363 | ||
1364 | /* | |
1365 | * wait for a request to complete | |
1366 | */ | |
1367 | int ceph_osdc_wait_request(struct ceph_osd_client *osdc, | |
1368 | struct ceph_osd_request *req) | |
1369 | { | |
1370 | int rc; | |
1371 | ||
1372 | rc = wait_for_completion_interruptible(&req->r_completion); | |
1373 | if (rc < 0) { | |
1374 | mutex_lock(&osdc->request_mutex); | |
1375 | __cancel_request(req); | |
529cfcc4 | 1376 | __unregister_request(osdc, req); |
f24e9980 | 1377 | mutex_unlock(&osdc->request_mutex); |
529cfcc4 | 1378 | dout("wait_request tid %llu canceled/timed out\n", req->r_tid); |
f24e9980 SW |
1379 | return rc; |
1380 | } | |
1381 | ||
1382 | dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result); | |
1383 | return req->r_result; | |
1384 | } | |
1385 | ||
1386 | /* | |
1387 | * sync - wait for all in-flight requests to flush. avoid starvation. | |
1388 | */ | |
1389 | void ceph_osdc_sync(struct ceph_osd_client *osdc) | |
1390 | { | |
1391 | struct ceph_osd_request *req; | |
1392 | u64 last_tid, next_tid = 0; | |
1393 | ||
1394 | mutex_lock(&osdc->request_mutex); | |
1395 | last_tid = osdc->last_tid; | |
1396 | while (1) { | |
1397 | req = __lookup_request_ge(osdc, next_tid); | |
1398 | if (!req) | |
1399 | break; | |
1400 | if (req->r_tid > last_tid) | |
1401 | break; | |
1402 | ||
1403 | next_tid = req->r_tid + 1; | |
1404 | if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0) | |
1405 | continue; | |
1406 | ||
1407 | ceph_osdc_get_request(req); | |
1408 | mutex_unlock(&osdc->request_mutex); | |
1409 | dout("sync waiting on tid %llu (last is %llu)\n", | |
1410 | req->r_tid, last_tid); | |
1411 | wait_for_completion(&req->r_safe_completion); | |
1412 | mutex_lock(&osdc->request_mutex); | |
1413 | ceph_osdc_put_request(req); | |
1414 | } | |
1415 | mutex_unlock(&osdc->request_mutex); | |
1416 | dout("sync done (thru tid %llu)\n", last_tid); | |
1417 | } | |
1418 | ||
1419 | /* | |
1420 | * init, shutdown | |
1421 | */ | |
1422 | int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) | |
1423 | { | |
1424 | int err; | |
1425 | ||
1426 | dout("init\n"); | |
1427 | osdc->client = client; | |
1428 | osdc->osdmap = NULL; | |
1429 | init_rwsem(&osdc->map_sem); | |
1430 | init_completion(&osdc->map_waiters); | |
1431 | osdc->last_requested_map = 0; | |
1432 | mutex_init(&osdc->request_mutex); | |
f24e9980 SW |
1433 | osdc->last_tid = 0; |
1434 | osdc->osds = RB_ROOT; | |
f5a2041b | 1435 | INIT_LIST_HEAD(&osdc->osd_lru); |
f24e9980 | 1436 | osdc->requests = RB_ROOT; |
422d2cb8 | 1437 | INIT_LIST_HEAD(&osdc->req_lru); |
f24e9980 SW |
1438 | osdc->num_requests = 0; |
1439 | INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); | |
f5a2041b YS |
1440 | INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); |
1441 | ||
1442 | schedule_delayed_work(&osdc->osds_timeout_work, | |
1443 | round_jiffies_relative(osdc->client->mount_args->osd_idle_ttl * HZ)); | |
f24e9980 | 1444 | |
5f44f142 | 1445 | err = -ENOMEM; |
f24e9980 SW |
1446 | osdc->req_mempool = mempool_create_kmalloc_pool(10, |
1447 | sizeof(struct ceph_osd_request)); | |
1448 | if (!osdc->req_mempool) | |
5f44f142 | 1449 | goto out; |
f24e9980 | 1450 | |
4f48280e SW |
1451 | err = ceph_msgpool_init(&osdc->msgpool_op, OSD_OP_FRONT_LEN, 10, true, |
1452 | "osd_op"); | |
f24e9980 | 1453 | if (err < 0) |
5f44f142 | 1454 | goto out_mempool; |
c16e7869 | 1455 | err = ceph_msgpool_init(&osdc->msgpool_op_reply, |
4f48280e SW |
1456 | OSD_OPREPLY_FRONT_LEN, 10, true, |
1457 | "osd_op_reply"); | |
c16e7869 SW |
1458 | if (err < 0) |
1459 | goto out_msgpool; | |
f24e9980 | 1460 | return 0; |
5f44f142 | 1461 | |
c16e7869 SW |
1462 | out_msgpool: |
1463 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
5f44f142 SW |
1464 | out_mempool: |
1465 | mempool_destroy(osdc->req_mempool); | |
1466 | out: | |
1467 | return err; | |
f24e9980 SW |
1468 | } |
1469 | ||
1470 | void ceph_osdc_stop(struct ceph_osd_client *osdc) | |
1471 | { | |
1472 | cancel_delayed_work_sync(&osdc->timeout_work); | |
f5a2041b | 1473 | cancel_delayed_work_sync(&osdc->osds_timeout_work); |
f24e9980 SW |
1474 | if (osdc->osdmap) { |
1475 | ceph_osdmap_destroy(osdc->osdmap); | |
1476 | osdc->osdmap = NULL; | |
1477 | } | |
f5a2041b | 1478 | remove_old_osds(osdc, 1); |
f24e9980 SW |
1479 | mempool_destroy(osdc->req_mempool); |
1480 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
c16e7869 | 1481 | ceph_msgpool_destroy(&osdc->msgpool_op_reply); |
f24e9980 SW |
1482 | } |
1483 | ||
1484 | /* | |
1485 | * Read some contiguous pages. If we cross a stripe boundary, shorten | |
1486 | * *plen. Return number of bytes read, or error. | |
1487 | */ | |
1488 | int ceph_osdc_readpages(struct ceph_osd_client *osdc, | |
1489 | struct ceph_vino vino, struct ceph_file_layout *layout, | |
1490 | u64 off, u64 *plen, | |
1491 | u32 truncate_seq, u64 truncate_size, | |
1492 | struct page **pages, int num_pages) | |
1493 | { | |
1494 | struct ceph_osd_request *req; | |
1495 | int rc = 0; | |
1496 | ||
1497 | dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, | |
1498 | vino.snap, off, *plen); | |
1499 | req = ceph_osdc_new_request(osdc, layout, vino, off, plen, | |
1500 | CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, | |
1501 | NULL, 0, truncate_seq, truncate_size, NULL, | |
1502 | false, 1); | |
a79832f2 SW |
1503 | if (!req) |
1504 | return -ENOMEM; | |
f24e9980 SW |
1505 | |
1506 | /* it may be a short read due to an object boundary */ | |
1507 | req->r_pages = pages; | |
f24e9980 SW |
1508 | |
1509 | dout("readpages final extent is %llu~%llu (%d pages)\n", | |
1510 | off, *plen, req->r_num_pages); | |
1511 | ||
1512 | rc = ceph_osdc_start_request(osdc, req, false); | |
1513 | if (!rc) | |
1514 | rc = ceph_osdc_wait_request(osdc, req); | |
1515 | ||
1516 | ceph_osdc_put_request(req); | |
1517 | dout("readpages result %d\n", rc); | |
1518 | return rc; | |
1519 | } | |
1520 | ||
1521 | /* | |
1522 | * do a synchronous write on N pages | |
1523 | */ | |
1524 | int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, | |
1525 | struct ceph_file_layout *layout, | |
1526 | struct ceph_snap_context *snapc, | |
1527 | u64 off, u64 len, | |
1528 | u32 truncate_seq, u64 truncate_size, | |
1529 | struct timespec *mtime, | |
1530 | struct page **pages, int num_pages, | |
1531 | int flags, int do_sync, bool nofail) | |
1532 | { | |
1533 | struct ceph_osd_request *req; | |
1534 | int rc = 0; | |
1535 | ||
1536 | BUG_ON(vino.snap != CEPH_NOSNAP); | |
1537 | req = ceph_osdc_new_request(osdc, layout, vino, off, &len, | |
1538 | CEPH_OSD_OP_WRITE, | |
1539 | flags | CEPH_OSD_FLAG_ONDISK | | |
1540 | CEPH_OSD_FLAG_WRITE, | |
1541 | snapc, do_sync, | |
1542 | truncate_seq, truncate_size, mtime, | |
1543 | nofail, 1); | |
a79832f2 SW |
1544 | if (!req) |
1545 | return -ENOMEM; | |
f24e9980 SW |
1546 | |
1547 | /* it may be a short write due to an object boundary */ | |
1548 | req->r_pages = pages; | |
f24e9980 SW |
1549 | dout("writepages %llu~%llu (%d pages)\n", off, len, |
1550 | req->r_num_pages); | |
1551 | ||
1552 | rc = ceph_osdc_start_request(osdc, req, nofail); | |
1553 | if (!rc) | |
1554 | rc = ceph_osdc_wait_request(osdc, req); | |
1555 | ||
1556 | ceph_osdc_put_request(req); | |
1557 | if (rc == 0) | |
1558 | rc = len; | |
1559 | dout("writepages result %d\n", rc); | |
1560 | return rc; | |
1561 | } | |
1562 | ||
1563 | /* | |
1564 | * handle incoming message | |
1565 | */ | |
1566 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
1567 | { | |
1568 | struct ceph_osd *osd = con->private; | |
32c895e7 | 1569 | struct ceph_osd_client *osdc; |
f24e9980 SW |
1570 | int type = le16_to_cpu(msg->hdr.type); |
1571 | ||
1572 | if (!osd) | |
4a32f93d | 1573 | goto out; |
32c895e7 | 1574 | osdc = osd->o_osdc; |
f24e9980 SW |
1575 | |
1576 | switch (type) { | |
1577 | case CEPH_MSG_OSD_MAP: | |
1578 | ceph_osdc_handle_map(osdc, msg); | |
1579 | break; | |
1580 | case CEPH_MSG_OSD_OPREPLY: | |
350b1c32 | 1581 | handle_reply(osdc, msg, con); |
f24e9980 SW |
1582 | break; |
1583 | ||
1584 | default: | |
1585 | pr_err("received unknown message type %d %s\n", type, | |
1586 | ceph_msg_type_name(type)); | |
1587 | } | |
4a32f93d | 1588 | out: |
f24e9980 SW |
1589 | ceph_msg_put(msg); |
1590 | } | |
1591 | ||
5b3a4db3 | 1592 | /* |
21b667f6 SW |
1593 | * lookup and return message for incoming reply. set up reply message |
1594 | * pages. | |
5b3a4db3 SW |
1595 | */ |
1596 | static struct ceph_msg *get_reply(struct ceph_connection *con, | |
2450418c YS |
1597 | struct ceph_msg_header *hdr, |
1598 | int *skip) | |
f24e9980 SW |
1599 | { |
1600 | struct ceph_osd *osd = con->private; | |
1601 | struct ceph_osd_client *osdc = osd->o_osdc; | |
2450418c | 1602 | struct ceph_msg *m; |
0547a9b3 | 1603 | struct ceph_osd_request *req; |
5b3a4db3 SW |
1604 | int front = le32_to_cpu(hdr->front_len); |
1605 | int data_len = le32_to_cpu(hdr->data_len); | |
0547a9b3 | 1606 | u64 tid; |
f24e9980 | 1607 | |
0547a9b3 YS |
1608 | tid = le64_to_cpu(hdr->tid); |
1609 | mutex_lock(&osdc->request_mutex); | |
1610 | req = __lookup_request(osdc, tid); | |
1611 | if (!req) { | |
1612 | *skip = 1; | |
1613 | m = NULL; | |
c16e7869 | 1614 | pr_info("get_reply unknown tid %llu from osd%d\n", tid, |
5b3a4db3 | 1615 | osd->o_osd); |
0547a9b3 YS |
1616 | goto out; |
1617 | } | |
c16e7869 SW |
1618 | |
1619 | if (req->r_con_filling_msg) { | |
1620 | dout("get_reply revoking msg %p from old con %p\n", | |
1621 | req->r_reply, req->r_con_filling_msg); | |
1622 | ceph_con_revoke_message(req->r_con_filling_msg, req->r_reply); | |
1623 | ceph_con_put(req->r_con_filling_msg); | |
6f46cb29 | 1624 | req->r_con_filling_msg = NULL; |
0547a9b3 YS |
1625 | } |
1626 | ||
c16e7869 SW |
1627 | if (front > req->r_reply->front.iov_len) { |
1628 | pr_warning("get_reply front %d > preallocated %d\n", | |
1629 | front, (int)req->r_reply->front.iov_len); | |
34d23762 | 1630 | m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS); |
a79832f2 | 1631 | if (!m) |
c16e7869 SW |
1632 | goto out; |
1633 | ceph_msg_put(req->r_reply); | |
1634 | req->r_reply = m; | |
1635 | } | |
1636 | m = ceph_msg_get(req->r_reply); | |
1637 | ||
0547a9b3 | 1638 | if (data_len > 0) { |
21b667f6 SW |
1639 | unsigned data_off = le16_to_cpu(hdr->data_off); |
1640 | int want = calc_pages_for(data_off & ~PAGE_MASK, data_len); | |
1641 | ||
1642 | if (unlikely(req->r_num_pages < want)) { | |
1643 | pr_warning("tid %lld reply %d > expected %d pages\n", | |
1644 | tid, want, m->nr_pages); | |
0547a9b3 YS |
1645 | *skip = 1; |
1646 | ceph_msg_put(m); | |
a79832f2 | 1647 | m = NULL; |
21b667f6 | 1648 | goto out; |
0547a9b3 | 1649 | } |
21b667f6 SW |
1650 | m->pages = req->r_pages; |
1651 | m->nr_pages = req->r_num_pages; | |
68b4476b YS |
1652 | #ifdef CONFIG_BLOCK |
1653 | m->bio = req->r_bio; | |
1654 | #endif | |
0547a9b3 | 1655 | } |
5b3a4db3 | 1656 | *skip = 0; |
c16e7869 SW |
1657 | req->r_con_filling_msg = ceph_con_get(con); |
1658 | dout("get_reply tid %lld %p\n", tid, m); | |
0547a9b3 YS |
1659 | |
1660 | out: | |
1661 | mutex_unlock(&osdc->request_mutex); | |
2450418c | 1662 | return m; |
5b3a4db3 SW |
1663 | |
1664 | } | |
1665 | ||
1666 | static struct ceph_msg *alloc_msg(struct ceph_connection *con, | |
1667 | struct ceph_msg_header *hdr, | |
1668 | int *skip) | |
1669 | { | |
1670 | struct ceph_osd *osd = con->private; | |
1671 | int type = le16_to_cpu(hdr->type); | |
1672 | int front = le32_to_cpu(hdr->front_len); | |
1673 | ||
1674 | switch (type) { | |
1675 | case CEPH_MSG_OSD_MAP: | |
34d23762 | 1676 | return ceph_msg_new(type, front, GFP_NOFS); |
5b3a4db3 SW |
1677 | case CEPH_MSG_OSD_OPREPLY: |
1678 | return get_reply(con, hdr, skip); | |
1679 | default: | |
1680 | pr_info("alloc_msg unexpected msg type %d from osd%d\n", type, | |
1681 | osd->o_osd); | |
1682 | *skip = 1; | |
1683 | return NULL; | |
1684 | } | |
f24e9980 SW |
1685 | } |
1686 | ||
1687 | /* | |
1688 | * Wrappers to refcount containing ceph_osd struct | |
1689 | */ | |
1690 | static struct ceph_connection *get_osd_con(struct ceph_connection *con) | |
1691 | { | |
1692 | struct ceph_osd *osd = con->private; | |
1693 | if (get_osd(osd)) | |
1694 | return con; | |
1695 | return NULL; | |
1696 | } | |
1697 | ||
1698 | static void put_osd_con(struct ceph_connection *con) | |
1699 | { | |
1700 | struct ceph_osd *osd = con->private; | |
1701 | put_osd(osd); | |
1702 | } | |
1703 | ||
4e7a5dcd SW |
1704 | /* |
1705 | * authentication | |
1706 | */ | |
1707 | static int get_authorizer(struct ceph_connection *con, | |
213c99ee SW |
1708 | void **buf, int *len, int *proto, |
1709 | void **reply_buf, int *reply_len, int force_new) | |
4e7a5dcd SW |
1710 | { |
1711 | struct ceph_osd *o = con->private; | |
1712 | struct ceph_osd_client *osdc = o->o_osdc; | |
1713 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
1714 | int ret = 0; | |
1715 | ||
1716 | if (force_new && o->o_authorizer) { | |
1717 | ac->ops->destroy_authorizer(ac, o->o_authorizer); | |
1718 | o->o_authorizer = NULL; | |
1719 | } | |
1720 | if (o->o_authorizer == NULL) { | |
1721 | ret = ac->ops->create_authorizer( | |
1722 | ac, CEPH_ENTITY_TYPE_OSD, | |
1723 | &o->o_authorizer, | |
1724 | &o->o_authorizer_buf, | |
1725 | &o->o_authorizer_buf_len, | |
1726 | &o->o_authorizer_reply_buf, | |
1727 | &o->o_authorizer_reply_buf_len); | |
1728 | if (ret) | |
213c99ee | 1729 | return ret; |
4e7a5dcd SW |
1730 | } |
1731 | ||
1732 | *proto = ac->protocol; | |
1733 | *buf = o->o_authorizer_buf; | |
1734 | *len = o->o_authorizer_buf_len; | |
1735 | *reply_buf = o->o_authorizer_reply_buf; | |
1736 | *reply_len = o->o_authorizer_reply_buf_len; | |
1737 | return 0; | |
1738 | } | |
1739 | ||
1740 | ||
1741 | static int verify_authorizer_reply(struct ceph_connection *con, int len) | |
1742 | { | |
1743 | struct ceph_osd *o = con->private; | |
1744 | struct ceph_osd_client *osdc = o->o_osdc; | |
1745 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
1746 | ||
1747 | return ac->ops->verify_authorizer_reply(ac, o->o_authorizer, len); | |
1748 | } | |
1749 | ||
9bd2e6f8 SW |
1750 | static int invalidate_authorizer(struct ceph_connection *con) |
1751 | { | |
1752 | struct ceph_osd *o = con->private; | |
1753 | struct ceph_osd_client *osdc = o->o_osdc; | |
1754 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
1755 | ||
1756 | if (ac->ops->invalidate_authorizer) | |
1757 | ac->ops->invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); | |
1758 | ||
1759 | return ceph_monc_validate_auth(&osdc->client->monc); | |
1760 | } | |
4e7a5dcd | 1761 | |
9e32789f | 1762 | static const struct ceph_connection_operations osd_con_ops = { |
f24e9980 SW |
1763 | .get = get_osd_con, |
1764 | .put = put_osd_con, | |
1765 | .dispatch = dispatch, | |
4e7a5dcd SW |
1766 | .get_authorizer = get_authorizer, |
1767 | .verify_authorizer_reply = verify_authorizer_reply, | |
9bd2e6f8 | 1768 | .invalidate_authorizer = invalidate_authorizer, |
f24e9980 | 1769 | .alloc_msg = alloc_msg, |
81b024e7 | 1770 | .fault = osd_reset, |
f24e9980 | 1771 | }; |