Commit | Line | Data |
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3d14c5d2 | 1 | #include <linux/ceph/ceph_debug.h> |
f24e9980 | 2 | |
3d14c5d2 | 3 | #include <linux/module.h> |
f24e9980 SW |
4 | #include <linux/err.h> |
5 | #include <linux/highmem.h> | |
6 | #include <linux/mm.h> | |
7 | #include <linux/pagemap.h> | |
8 | #include <linux/slab.h> | |
9 | #include <linux/uaccess.h> | |
68b4476b YS |
10 | #ifdef CONFIG_BLOCK |
11 | #include <linux/bio.h> | |
12 | #endif | |
f24e9980 | 13 | |
3d14c5d2 YS |
14 | #include <linux/ceph/libceph.h> |
15 | #include <linux/ceph/osd_client.h> | |
16 | #include <linux/ceph/messenger.h> | |
17 | #include <linux/ceph/decode.h> | |
18 | #include <linux/ceph/auth.h> | |
19 | #include <linux/ceph/pagelist.h> | |
f24e9980 | 20 | |
c16e7869 SW |
21 | #define OSD_OP_FRONT_LEN 4096 |
22 | #define OSD_OPREPLY_FRONT_LEN 512 | |
0d59ab81 | 23 | |
9e32789f | 24 | static const struct ceph_connection_operations osd_con_ops; |
422d2cb8 YS |
25 | static int __kick_requests(struct ceph_osd_client *osdc, |
26 | struct ceph_osd *kickosd); | |
f24e9980 SW |
27 | |
28 | static void kick_requests(struct ceph_osd_client *osdc, struct ceph_osd *osd); | |
29 | ||
68b4476b YS |
30 | static int op_needs_trail(int op) |
31 | { | |
32 | switch (op) { | |
33 | case CEPH_OSD_OP_GETXATTR: | |
34 | case CEPH_OSD_OP_SETXATTR: | |
35 | case CEPH_OSD_OP_CMPXATTR: | |
36 | case CEPH_OSD_OP_CALL: | |
37 | return 1; | |
38 | default: | |
39 | return 0; | |
40 | } | |
41 | } | |
42 | ||
43 | static int op_has_extent(int op) | |
44 | { | |
45 | return (op == CEPH_OSD_OP_READ || | |
46 | op == CEPH_OSD_OP_WRITE); | |
47 | } | |
48 | ||
3499e8a5 YS |
49 | void ceph_calc_raw_layout(struct ceph_osd_client *osdc, |
50 | struct ceph_file_layout *layout, | |
51 | u64 snapid, | |
68b4476b YS |
52 | u64 off, u64 *plen, u64 *bno, |
53 | struct ceph_osd_request *req, | |
54 | struct ceph_osd_req_op *op) | |
3499e8a5 YS |
55 | { |
56 | struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base; | |
68b4476b | 57 | u64 orig_len = *plen; |
3499e8a5 YS |
58 | u64 objoff, objlen; /* extent in object */ |
59 | ||
60 | reqhead->snapid = cpu_to_le64(snapid); | |
61 | ||
62 | /* object extent? */ | |
68b4476b | 63 | ceph_calc_file_object_mapping(layout, off, plen, bno, |
3499e8a5 | 64 | &objoff, &objlen); |
68b4476b | 65 | if (*plen < orig_len) |
3499e8a5 | 66 | dout(" skipping last %llu, final file extent %llu~%llu\n", |
68b4476b | 67 | orig_len - *plen, off, *plen); |
3499e8a5 | 68 | |
68b4476b YS |
69 | if (op_has_extent(op->op)) { |
70 | op->extent.offset = objoff; | |
71 | op->extent.length = objlen; | |
72 | } | |
73 | req->r_num_pages = calc_pages_for(off, *plen); | |
3d14c5d2 YS |
74 | if (op->op == CEPH_OSD_OP_WRITE) |
75 | op->payload_len = *plen; | |
3499e8a5 YS |
76 | |
77 | dout("calc_layout bno=%llx %llu~%llu (%d pages)\n", | |
78 | *bno, objoff, objlen, req->r_num_pages); | |
79 | ||
80 | } | |
3d14c5d2 | 81 | EXPORT_SYMBOL(ceph_calc_raw_layout); |
3499e8a5 | 82 | |
f24e9980 SW |
83 | /* |
84 | * Implement client access to distributed object storage cluster. | |
85 | * | |
86 | * All data objects are stored within a cluster/cloud of OSDs, or | |
87 | * "object storage devices." (Note that Ceph OSDs have _nothing_ to | |
88 | * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply | |
89 | * remote daemons serving up and coordinating consistent and safe | |
90 | * access to storage. | |
91 | * | |
92 | * Cluster membership and the mapping of data objects onto storage devices | |
93 | * are described by the osd map. | |
94 | * | |
95 | * We keep track of pending OSD requests (read, write), resubmit | |
96 | * requests to different OSDs when the cluster topology/data layout | |
97 | * change, or retry the affected requests when the communications | |
98 | * channel with an OSD is reset. | |
99 | */ | |
100 | ||
101 | /* | |
102 | * calculate the mapping of a file extent onto an object, and fill out the | |
103 | * request accordingly. shorten extent as necessary if it crosses an | |
104 | * object boundary. | |
105 | * | |
106 | * fill osd op in request message. | |
107 | */ | |
108 | static void calc_layout(struct ceph_osd_client *osdc, | |
3499e8a5 YS |
109 | struct ceph_vino vino, |
110 | struct ceph_file_layout *layout, | |
f24e9980 | 111 | u64 off, u64 *plen, |
68b4476b YS |
112 | struct ceph_osd_request *req, |
113 | struct ceph_osd_req_op *op) | |
f24e9980 | 114 | { |
f24e9980 SW |
115 | u64 bno; |
116 | ||
68b4476b YS |
117 | ceph_calc_raw_layout(osdc, layout, vino.snap, off, |
118 | plen, &bno, req, op); | |
f24e9980 SW |
119 | |
120 | sprintf(req->r_oid, "%llx.%08llx", vino.ino, bno); | |
121 | req->r_oid_len = strlen(req->r_oid); | |
f24e9980 SW |
122 | } |
123 | ||
f24e9980 SW |
124 | /* |
125 | * requests | |
126 | */ | |
415e49a9 | 127 | void ceph_osdc_release_request(struct kref *kref) |
f24e9980 | 128 | { |
415e49a9 SW |
129 | struct ceph_osd_request *req = container_of(kref, |
130 | struct ceph_osd_request, | |
131 | r_kref); | |
132 | ||
133 | if (req->r_request) | |
134 | ceph_msg_put(req->r_request); | |
135 | if (req->r_reply) | |
136 | ceph_msg_put(req->r_reply); | |
0d59ab81 | 137 | if (req->r_con_filling_msg) { |
350b1c32 | 138 | dout("release_request revoking pages %p from con %p\n", |
0d59ab81 YS |
139 | req->r_pages, req->r_con_filling_msg); |
140 | ceph_con_revoke_message(req->r_con_filling_msg, | |
141 | req->r_reply); | |
142 | ceph_con_put(req->r_con_filling_msg); | |
350b1c32 | 143 | } |
415e49a9 SW |
144 | if (req->r_own_pages) |
145 | ceph_release_page_vector(req->r_pages, | |
146 | req->r_num_pages); | |
68b4476b YS |
147 | #ifdef CONFIG_BLOCK |
148 | if (req->r_bio) | |
149 | bio_put(req->r_bio); | |
150 | #endif | |
415e49a9 | 151 | ceph_put_snap_context(req->r_snapc); |
68b4476b YS |
152 | if (req->r_trail) { |
153 | ceph_pagelist_release(req->r_trail); | |
154 | kfree(req->r_trail); | |
155 | } | |
415e49a9 SW |
156 | if (req->r_mempool) |
157 | mempool_free(req, req->r_osdc->req_mempool); | |
158 | else | |
159 | kfree(req); | |
f24e9980 | 160 | } |
3d14c5d2 | 161 | EXPORT_SYMBOL(ceph_osdc_release_request); |
68b4476b YS |
162 | |
163 | static int get_num_ops(struct ceph_osd_req_op *ops, int *needs_trail) | |
164 | { | |
165 | int i = 0; | |
166 | ||
167 | if (needs_trail) | |
168 | *needs_trail = 0; | |
169 | while (ops[i].op) { | |
170 | if (needs_trail && op_needs_trail(ops[i].op)) | |
171 | *needs_trail = 1; | |
172 | i++; | |
173 | } | |
174 | ||
175 | return i; | |
176 | } | |
177 | ||
3499e8a5 YS |
178 | struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, |
179 | int flags, | |
f24e9980 | 180 | struct ceph_snap_context *snapc, |
68b4476b | 181 | struct ceph_osd_req_op *ops, |
3499e8a5 YS |
182 | bool use_mempool, |
183 | gfp_t gfp_flags, | |
68b4476b YS |
184 | struct page **pages, |
185 | struct bio *bio) | |
f24e9980 SW |
186 | { |
187 | struct ceph_osd_request *req; | |
188 | struct ceph_msg *msg; | |
68b4476b YS |
189 | int needs_trail; |
190 | int num_op = get_num_ops(ops, &needs_trail); | |
191 | size_t msg_size = sizeof(struct ceph_osd_request_head); | |
3499e8a5 | 192 | |
68b4476b | 193 | msg_size += num_op*sizeof(struct ceph_osd_op); |
f24e9980 SW |
194 | |
195 | if (use_mempool) { | |
3499e8a5 | 196 | req = mempool_alloc(osdc->req_mempool, gfp_flags); |
f24e9980 SW |
197 | memset(req, 0, sizeof(*req)); |
198 | } else { | |
3499e8a5 | 199 | req = kzalloc(sizeof(*req), gfp_flags); |
f24e9980 SW |
200 | } |
201 | if (req == NULL) | |
a79832f2 | 202 | return NULL; |
f24e9980 | 203 | |
f24e9980 SW |
204 | req->r_osdc = osdc; |
205 | req->r_mempool = use_mempool; | |
68b4476b | 206 | |
415e49a9 | 207 | kref_init(&req->r_kref); |
f24e9980 SW |
208 | init_completion(&req->r_completion); |
209 | init_completion(&req->r_safe_completion); | |
210 | INIT_LIST_HEAD(&req->r_unsafe_item); | |
211 | req->r_flags = flags; | |
212 | ||
213 | WARN_ON((flags & (CEPH_OSD_FLAG_READ|CEPH_OSD_FLAG_WRITE)) == 0); | |
214 | ||
c16e7869 SW |
215 | /* create reply message */ |
216 | if (use_mempool) | |
217 | msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); | |
218 | else | |
219 | msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, | |
3499e8a5 | 220 | OSD_OPREPLY_FRONT_LEN, gfp_flags); |
a79832f2 | 221 | if (!msg) { |
c16e7869 | 222 | ceph_osdc_put_request(req); |
a79832f2 | 223 | return NULL; |
c16e7869 SW |
224 | } |
225 | req->r_reply = msg; | |
226 | ||
68b4476b YS |
227 | /* allocate space for the trailing data */ |
228 | if (needs_trail) { | |
229 | req->r_trail = kmalloc(sizeof(struct ceph_pagelist), gfp_flags); | |
230 | if (!req->r_trail) { | |
231 | ceph_osdc_put_request(req); | |
232 | return NULL; | |
233 | } | |
234 | ceph_pagelist_init(req->r_trail); | |
235 | } | |
c16e7869 | 236 | /* create request message; allow space for oid */ |
f24e9980 SW |
237 | msg_size += 40; |
238 | if (snapc) | |
239 | msg_size += sizeof(u64) * snapc->num_snaps; | |
240 | if (use_mempool) | |
8f3bc053 | 241 | msg = ceph_msgpool_get(&osdc->msgpool_op, 0); |
f24e9980 | 242 | else |
3499e8a5 | 243 | msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags); |
a79832f2 | 244 | if (!msg) { |
f24e9980 | 245 | ceph_osdc_put_request(req); |
a79832f2 | 246 | return NULL; |
f24e9980 | 247 | } |
68b4476b | 248 | |
f24e9980 SW |
249 | msg->hdr.type = cpu_to_le16(CEPH_MSG_OSD_OP); |
250 | memset(msg->front.iov_base, 0, msg->front.iov_len); | |
3499e8a5 YS |
251 | |
252 | req->r_request = msg; | |
253 | req->r_pages = pages; | |
68b4476b YS |
254 | #ifdef CONFIG_BLOCK |
255 | if (bio) { | |
256 | req->r_bio = bio; | |
257 | bio_get(req->r_bio); | |
258 | } | |
259 | #endif | |
3499e8a5 YS |
260 | |
261 | return req; | |
262 | } | |
3d14c5d2 | 263 | EXPORT_SYMBOL(ceph_osdc_alloc_request); |
3499e8a5 | 264 | |
68b4476b YS |
265 | static void osd_req_encode_op(struct ceph_osd_request *req, |
266 | struct ceph_osd_op *dst, | |
267 | struct ceph_osd_req_op *src) | |
268 | { | |
269 | dst->op = cpu_to_le16(src->op); | |
270 | ||
271 | switch (dst->op) { | |
272 | case CEPH_OSD_OP_READ: | |
273 | case CEPH_OSD_OP_WRITE: | |
274 | dst->extent.offset = | |
275 | cpu_to_le64(src->extent.offset); | |
276 | dst->extent.length = | |
277 | cpu_to_le64(src->extent.length); | |
278 | dst->extent.truncate_size = | |
279 | cpu_to_le64(src->extent.truncate_size); | |
280 | dst->extent.truncate_seq = | |
281 | cpu_to_le32(src->extent.truncate_seq); | |
282 | break; | |
283 | ||
284 | case CEPH_OSD_OP_GETXATTR: | |
285 | case CEPH_OSD_OP_SETXATTR: | |
286 | case CEPH_OSD_OP_CMPXATTR: | |
287 | BUG_ON(!req->r_trail); | |
288 | ||
289 | dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); | |
290 | dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); | |
291 | dst->xattr.cmp_op = src->xattr.cmp_op; | |
292 | dst->xattr.cmp_mode = src->xattr.cmp_mode; | |
293 | ceph_pagelist_append(req->r_trail, src->xattr.name, | |
294 | src->xattr.name_len); | |
295 | ceph_pagelist_append(req->r_trail, src->xattr.val, | |
296 | src->xattr.value_len); | |
297 | break; | |
ae1533b6 YS |
298 | case CEPH_OSD_OP_CALL: |
299 | BUG_ON(!req->r_trail); | |
300 | ||
301 | dst->cls.class_len = src->cls.class_len; | |
302 | dst->cls.method_len = src->cls.method_len; | |
303 | dst->cls.indata_len = cpu_to_le32(src->cls.indata_len); | |
304 | ||
305 | ceph_pagelist_append(req->r_trail, src->cls.class_name, | |
306 | src->cls.class_len); | |
307 | ceph_pagelist_append(req->r_trail, src->cls.method_name, | |
308 | src->cls.method_len); | |
309 | ceph_pagelist_append(req->r_trail, src->cls.indata, | |
310 | src->cls.indata_len); | |
311 | break; | |
312 | case CEPH_OSD_OP_ROLLBACK: | |
313 | dst->snap.snapid = cpu_to_le64(src->snap.snapid); | |
314 | break; | |
68b4476b YS |
315 | case CEPH_OSD_OP_STARTSYNC: |
316 | break; | |
317 | default: | |
318 | pr_err("unrecognized osd opcode %d\n", dst->op); | |
319 | WARN_ON(1); | |
320 | break; | |
321 | } | |
322 | dst->payload_len = cpu_to_le32(src->payload_len); | |
323 | } | |
324 | ||
3499e8a5 YS |
325 | /* |
326 | * build new request AND message | |
327 | * | |
328 | */ | |
329 | void ceph_osdc_build_request(struct ceph_osd_request *req, | |
68b4476b YS |
330 | u64 off, u64 *plen, |
331 | struct ceph_osd_req_op *src_ops, | |
332 | struct ceph_snap_context *snapc, | |
333 | struct timespec *mtime, | |
334 | const char *oid, | |
335 | int oid_len) | |
3499e8a5 YS |
336 | { |
337 | struct ceph_msg *msg = req->r_request; | |
338 | struct ceph_osd_request_head *head; | |
68b4476b | 339 | struct ceph_osd_req_op *src_op; |
3499e8a5 YS |
340 | struct ceph_osd_op *op; |
341 | void *p; | |
68b4476b | 342 | int num_op = get_num_ops(src_ops, NULL); |
3499e8a5 | 343 | size_t msg_size = sizeof(*head) + num_op*sizeof(*op); |
3499e8a5 | 344 | int flags = req->r_flags; |
68b4476b YS |
345 | u64 data_len = 0; |
346 | int i; | |
3499e8a5 | 347 | |
f24e9980 SW |
348 | head = msg->front.iov_base; |
349 | op = (void *)(head + 1); | |
350 | p = (void *)(op + num_op); | |
351 | ||
f24e9980 SW |
352 | req->r_snapc = ceph_get_snap_context(snapc); |
353 | ||
354 | head->client_inc = cpu_to_le32(1); /* always, for now. */ | |
355 | head->flags = cpu_to_le32(flags); | |
356 | if (flags & CEPH_OSD_FLAG_WRITE) | |
357 | ceph_encode_timespec(&head->mtime, mtime); | |
358 | head->num_ops = cpu_to_le16(num_op); | |
f24e9980 | 359 | |
f24e9980 SW |
360 | |
361 | /* fill in oid */ | |
3499e8a5 YS |
362 | head->object_len = cpu_to_le32(oid_len); |
363 | memcpy(p, oid, oid_len); | |
364 | p += oid_len; | |
f24e9980 | 365 | |
68b4476b YS |
366 | src_op = src_ops; |
367 | while (src_op->op) { | |
368 | osd_req_encode_op(req, op, src_op); | |
369 | src_op++; | |
f24e9980 | 370 | op++; |
f24e9980 | 371 | } |
68b4476b YS |
372 | |
373 | if (req->r_trail) | |
374 | data_len += req->r_trail->length; | |
375 | ||
f24e9980 SW |
376 | if (snapc) { |
377 | head->snap_seq = cpu_to_le64(snapc->seq); | |
378 | head->num_snaps = cpu_to_le32(snapc->num_snaps); | |
379 | for (i = 0; i < snapc->num_snaps; i++) { | |
380 | put_unaligned_le64(snapc->snaps[i], p); | |
381 | p += sizeof(u64); | |
382 | } | |
383 | } | |
384 | ||
68b4476b YS |
385 | if (flags & CEPH_OSD_FLAG_WRITE) { |
386 | req->r_request->hdr.data_off = cpu_to_le16(off); | |
387 | req->r_request->hdr.data_len = cpu_to_le32(*plen + data_len); | |
388 | } else if (data_len) { | |
389 | req->r_request->hdr.data_off = 0; | |
390 | req->r_request->hdr.data_len = cpu_to_le32(data_len); | |
391 | } | |
392 | ||
f24e9980 | 393 | BUG_ON(p > msg->front.iov_base + msg->front.iov_len); |
6f863e71 SW |
394 | msg_size = p - msg->front.iov_base; |
395 | msg->front.iov_len = msg_size; | |
396 | msg->hdr.front_len = cpu_to_le32(msg_size); | |
3499e8a5 YS |
397 | return; |
398 | } | |
3d14c5d2 | 399 | EXPORT_SYMBOL(ceph_osdc_build_request); |
3499e8a5 YS |
400 | |
401 | /* | |
402 | * build new request AND message, calculate layout, and adjust file | |
403 | * extent as needed. | |
404 | * | |
405 | * if the file was recently truncated, we include information about its | |
406 | * old and new size so that the object can be updated appropriately. (we | |
407 | * avoid synchronously deleting truncated objects because it's slow.) | |
408 | * | |
409 | * if @do_sync, include a 'startsync' command so that the osd will flush | |
410 | * data quickly. | |
411 | */ | |
412 | struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, | |
413 | struct ceph_file_layout *layout, | |
414 | struct ceph_vino vino, | |
415 | u64 off, u64 *plen, | |
416 | int opcode, int flags, | |
417 | struct ceph_snap_context *snapc, | |
418 | int do_sync, | |
419 | u32 truncate_seq, | |
420 | u64 truncate_size, | |
421 | struct timespec *mtime, | |
422 | bool use_mempool, int num_reply) | |
423 | { | |
68b4476b YS |
424 | struct ceph_osd_req_op ops[3]; |
425 | struct ceph_osd_request *req; | |
426 | ||
427 | ops[0].op = opcode; | |
428 | ops[0].extent.truncate_seq = truncate_seq; | |
429 | ops[0].extent.truncate_size = truncate_size; | |
430 | ops[0].payload_len = 0; | |
431 | ||
432 | if (do_sync) { | |
433 | ops[1].op = CEPH_OSD_OP_STARTSYNC; | |
434 | ops[1].payload_len = 0; | |
435 | ops[2].op = 0; | |
436 | } else | |
437 | ops[1].op = 0; | |
438 | ||
439 | req = ceph_osdc_alloc_request(osdc, flags, | |
440 | snapc, ops, | |
3499e8a5 | 441 | use_mempool, |
68b4476b | 442 | GFP_NOFS, NULL, NULL); |
3499e8a5 YS |
443 | if (IS_ERR(req)) |
444 | return req; | |
445 | ||
446 | /* calculate max write size */ | |
68b4476b | 447 | calc_layout(osdc, vino, layout, off, plen, req, ops); |
3499e8a5 YS |
448 | req->r_file_layout = *layout; /* keep a copy */ |
449 | ||
68b4476b YS |
450 | ceph_osdc_build_request(req, off, plen, ops, |
451 | snapc, | |
3499e8a5 YS |
452 | mtime, |
453 | req->r_oid, req->r_oid_len); | |
454 | ||
f24e9980 SW |
455 | return req; |
456 | } | |
3d14c5d2 | 457 | EXPORT_SYMBOL(ceph_osdc_new_request); |
f24e9980 SW |
458 | |
459 | /* | |
460 | * We keep osd requests in an rbtree, sorted by ->r_tid. | |
461 | */ | |
462 | static void __insert_request(struct ceph_osd_client *osdc, | |
463 | struct ceph_osd_request *new) | |
464 | { | |
465 | struct rb_node **p = &osdc->requests.rb_node; | |
466 | struct rb_node *parent = NULL; | |
467 | struct ceph_osd_request *req = NULL; | |
468 | ||
469 | while (*p) { | |
470 | parent = *p; | |
471 | req = rb_entry(parent, struct ceph_osd_request, r_node); | |
472 | if (new->r_tid < req->r_tid) | |
473 | p = &(*p)->rb_left; | |
474 | else if (new->r_tid > req->r_tid) | |
475 | p = &(*p)->rb_right; | |
476 | else | |
477 | BUG(); | |
478 | } | |
479 | ||
480 | rb_link_node(&new->r_node, parent, p); | |
481 | rb_insert_color(&new->r_node, &osdc->requests); | |
482 | } | |
483 | ||
484 | static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc, | |
485 | u64 tid) | |
486 | { | |
487 | struct ceph_osd_request *req; | |
488 | struct rb_node *n = osdc->requests.rb_node; | |
489 | ||
490 | while (n) { | |
491 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
492 | if (tid < req->r_tid) | |
493 | n = n->rb_left; | |
494 | else if (tid > req->r_tid) | |
495 | n = n->rb_right; | |
496 | else | |
497 | return req; | |
498 | } | |
499 | return NULL; | |
500 | } | |
501 | ||
502 | static struct ceph_osd_request * | |
503 | __lookup_request_ge(struct ceph_osd_client *osdc, | |
504 | u64 tid) | |
505 | { | |
506 | struct ceph_osd_request *req; | |
507 | struct rb_node *n = osdc->requests.rb_node; | |
508 | ||
509 | while (n) { | |
510 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
511 | if (tid < req->r_tid) { | |
512 | if (!n->rb_left) | |
513 | return req; | |
514 | n = n->rb_left; | |
515 | } else if (tid > req->r_tid) { | |
516 | n = n->rb_right; | |
517 | } else { | |
518 | return req; | |
519 | } | |
520 | } | |
521 | return NULL; | |
522 | } | |
523 | ||
524 | ||
525 | /* | |
81b024e7 | 526 | * If the osd connection drops, we need to resubmit all requests. |
f24e9980 SW |
527 | */ |
528 | static void osd_reset(struct ceph_connection *con) | |
529 | { | |
530 | struct ceph_osd *osd = con->private; | |
531 | struct ceph_osd_client *osdc; | |
532 | ||
533 | if (!osd) | |
534 | return; | |
535 | dout("osd_reset osd%d\n", osd->o_osd); | |
536 | osdc = osd->o_osdc; | |
f24e9980 SW |
537 | down_read(&osdc->map_sem); |
538 | kick_requests(osdc, osd); | |
539 | up_read(&osdc->map_sem); | |
540 | } | |
541 | ||
542 | /* | |
543 | * Track open sessions with osds. | |
544 | */ | |
545 | static struct ceph_osd *create_osd(struct ceph_osd_client *osdc) | |
546 | { | |
547 | struct ceph_osd *osd; | |
548 | ||
549 | osd = kzalloc(sizeof(*osd), GFP_NOFS); | |
550 | if (!osd) | |
551 | return NULL; | |
552 | ||
553 | atomic_set(&osd->o_ref, 1); | |
554 | osd->o_osdc = osdc; | |
555 | INIT_LIST_HEAD(&osd->o_requests); | |
f5a2041b | 556 | INIT_LIST_HEAD(&osd->o_osd_lru); |
f24e9980 SW |
557 | osd->o_incarnation = 1; |
558 | ||
559 | ceph_con_init(osdc->client->msgr, &osd->o_con); | |
560 | osd->o_con.private = osd; | |
561 | osd->o_con.ops = &osd_con_ops; | |
562 | osd->o_con.peer_name.type = CEPH_ENTITY_TYPE_OSD; | |
4e7a5dcd | 563 | |
422d2cb8 | 564 | INIT_LIST_HEAD(&osd->o_keepalive_item); |
f24e9980 SW |
565 | return osd; |
566 | } | |
567 | ||
568 | static struct ceph_osd *get_osd(struct ceph_osd *osd) | |
569 | { | |
570 | if (atomic_inc_not_zero(&osd->o_ref)) { | |
571 | dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1, | |
572 | atomic_read(&osd->o_ref)); | |
573 | return osd; | |
574 | } else { | |
575 | dout("get_osd %p FAIL\n", osd); | |
576 | return NULL; | |
577 | } | |
578 | } | |
579 | ||
580 | static void put_osd(struct ceph_osd *osd) | |
581 | { | |
582 | dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref), | |
583 | atomic_read(&osd->o_ref) - 1); | |
79494d1b SW |
584 | if (atomic_dec_and_test(&osd->o_ref)) { |
585 | struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth; | |
586 | ||
587 | if (osd->o_authorizer) | |
588 | ac->ops->destroy_authorizer(ac, osd->o_authorizer); | |
f24e9980 | 589 | kfree(osd); |
79494d1b | 590 | } |
f24e9980 SW |
591 | } |
592 | ||
593 | /* | |
594 | * remove an osd from our map | |
595 | */ | |
f5a2041b | 596 | static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) |
f24e9980 | 597 | { |
f5a2041b | 598 | dout("__remove_osd %p\n", osd); |
f24e9980 SW |
599 | BUG_ON(!list_empty(&osd->o_requests)); |
600 | rb_erase(&osd->o_node, &osdc->osds); | |
f5a2041b | 601 | list_del_init(&osd->o_osd_lru); |
f24e9980 SW |
602 | ceph_con_close(&osd->o_con); |
603 | put_osd(osd); | |
604 | } | |
605 | ||
f5a2041b YS |
606 | static void __move_osd_to_lru(struct ceph_osd_client *osdc, |
607 | struct ceph_osd *osd) | |
608 | { | |
609 | dout("__move_osd_to_lru %p\n", osd); | |
610 | BUG_ON(!list_empty(&osd->o_osd_lru)); | |
611 | list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); | |
3d14c5d2 | 612 | osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ; |
f5a2041b YS |
613 | } |
614 | ||
615 | static void __remove_osd_from_lru(struct ceph_osd *osd) | |
616 | { | |
617 | dout("__remove_osd_from_lru %p\n", osd); | |
618 | if (!list_empty(&osd->o_osd_lru)) | |
619 | list_del_init(&osd->o_osd_lru); | |
620 | } | |
621 | ||
622 | static void remove_old_osds(struct ceph_osd_client *osdc, int remove_all) | |
623 | { | |
624 | struct ceph_osd *osd, *nosd; | |
625 | ||
626 | dout("__remove_old_osds %p\n", osdc); | |
627 | mutex_lock(&osdc->request_mutex); | |
628 | list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { | |
629 | if (!remove_all && time_before(jiffies, osd->lru_ttl)) | |
630 | break; | |
631 | __remove_osd(osdc, osd); | |
632 | } | |
633 | mutex_unlock(&osdc->request_mutex); | |
634 | } | |
635 | ||
f24e9980 SW |
636 | /* |
637 | * reset osd connect | |
638 | */ | |
f5a2041b | 639 | static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) |
f24e9980 | 640 | { |
87b315a5 | 641 | struct ceph_osd_request *req; |
f24e9980 SW |
642 | int ret = 0; |
643 | ||
f5a2041b | 644 | dout("__reset_osd %p osd%d\n", osd, osd->o_osd); |
f24e9980 | 645 | if (list_empty(&osd->o_requests)) { |
f5a2041b | 646 | __remove_osd(osdc, osd); |
87b315a5 SW |
647 | } else if (memcmp(&osdc->osdmap->osd_addr[osd->o_osd], |
648 | &osd->o_con.peer_addr, | |
649 | sizeof(osd->o_con.peer_addr)) == 0 && | |
650 | !ceph_con_opened(&osd->o_con)) { | |
651 | dout(" osd addr hasn't changed and connection never opened," | |
652 | " letting msgr retry"); | |
653 | /* touch each r_stamp for handle_timeout()'s benfit */ | |
654 | list_for_each_entry(req, &osd->o_requests, r_osd_item) | |
655 | req->r_stamp = jiffies; | |
656 | ret = -EAGAIN; | |
f24e9980 SW |
657 | } else { |
658 | ceph_con_close(&osd->o_con); | |
659 | ceph_con_open(&osd->o_con, &osdc->osdmap->osd_addr[osd->o_osd]); | |
660 | osd->o_incarnation++; | |
661 | } | |
662 | return ret; | |
663 | } | |
664 | ||
665 | static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new) | |
666 | { | |
667 | struct rb_node **p = &osdc->osds.rb_node; | |
668 | struct rb_node *parent = NULL; | |
669 | struct ceph_osd *osd = NULL; | |
670 | ||
671 | while (*p) { | |
672 | parent = *p; | |
673 | osd = rb_entry(parent, struct ceph_osd, o_node); | |
674 | if (new->o_osd < osd->o_osd) | |
675 | p = &(*p)->rb_left; | |
676 | else if (new->o_osd > osd->o_osd) | |
677 | p = &(*p)->rb_right; | |
678 | else | |
679 | BUG(); | |
680 | } | |
681 | ||
682 | rb_link_node(&new->o_node, parent, p); | |
683 | rb_insert_color(&new->o_node, &osdc->osds); | |
684 | } | |
685 | ||
686 | static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o) | |
687 | { | |
688 | struct ceph_osd *osd; | |
689 | struct rb_node *n = osdc->osds.rb_node; | |
690 | ||
691 | while (n) { | |
692 | osd = rb_entry(n, struct ceph_osd, o_node); | |
693 | if (o < osd->o_osd) | |
694 | n = n->rb_left; | |
695 | else if (o > osd->o_osd) | |
696 | n = n->rb_right; | |
697 | else | |
698 | return osd; | |
699 | } | |
700 | return NULL; | |
701 | } | |
702 | ||
422d2cb8 YS |
703 | static void __schedule_osd_timeout(struct ceph_osd_client *osdc) |
704 | { | |
705 | schedule_delayed_work(&osdc->timeout_work, | |
3d14c5d2 | 706 | osdc->client->options->osd_keepalive_timeout * HZ); |
422d2cb8 YS |
707 | } |
708 | ||
709 | static void __cancel_osd_timeout(struct ceph_osd_client *osdc) | |
710 | { | |
711 | cancel_delayed_work(&osdc->timeout_work); | |
712 | } | |
f24e9980 SW |
713 | |
714 | /* | |
715 | * Register request, assign tid. If this is the first request, set up | |
716 | * the timeout event. | |
717 | */ | |
718 | static void register_request(struct ceph_osd_client *osdc, | |
719 | struct ceph_osd_request *req) | |
720 | { | |
f24e9980 SW |
721 | mutex_lock(&osdc->request_mutex); |
722 | req->r_tid = ++osdc->last_tid; | |
6df058c0 | 723 | req->r_request->hdr.tid = cpu_to_le64(req->r_tid); |
422d2cb8 | 724 | INIT_LIST_HEAD(&req->r_req_lru_item); |
f24e9980 SW |
725 | |
726 | dout("register_request %p tid %lld\n", req, req->r_tid); | |
727 | __insert_request(osdc, req); | |
728 | ceph_osdc_get_request(req); | |
729 | osdc->num_requests++; | |
730 | ||
f24e9980 | 731 | if (osdc->num_requests == 1) { |
422d2cb8 YS |
732 | dout(" first request, scheduling timeout\n"); |
733 | __schedule_osd_timeout(osdc); | |
f24e9980 SW |
734 | } |
735 | mutex_unlock(&osdc->request_mutex); | |
736 | } | |
737 | ||
738 | /* | |
739 | * called under osdc->request_mutex | |
740 | */ | |
741 | static void __unregister_request(struct ceph_osd_client *osdc, | |
742 | struct ceph_osd_request *req) | |
743 | { | |
744 | dout("__unregister_request %p tid %lld\n", req, req->r_tid); | |
745 | rb_erase(&req->r_node, &osdc->requests); | |
746 | osdc->num_requests--; | |
747 | ||
0ba6478d SW |
748 | if (req->r_osd) { |
749 | /* make sure the original request isn't in flight. */ | |
750 | ceph_con_revoke(&req->r_osd->o_con, req->r_request); | |
751 | ||
752 | list_del_init(&req->r_osd_item); | |
753 | if (list_empty(&req->r_osd->o_requests)) | |
f5a2041b | 754 | __move_osd_to_lru(osdc, req->r_osd); |
0ba6478d SW |
755 | req->r_osd = NULL; |
756 | } | |
f24e9980 SW |
757 | |
758 | ceph_osdc_put_request(req); | |
759 | ||
422d2cb8 YS |
760 | list_del_init(&req->r_req_lru_item); |
761 | if (osdc->num_requests == 0) { | |
762 | dout(" no requests, canceling timeout\n"); | |
763 | __cancel_osd_timeout(osdc); | |
f24e9980 SW |
764 | } |
765 | } | |
766 | ||
767 | /* | |
768 | * Cancel a previously queued request message | |
769 | */ | |
770 | static void __cancel_request(struct ceph_osd_request *req) | |
771 | { | |
6bc18876 | 772 | if (req->r_sent && req->r_osd) { |
f24e9980 SW |
773 | ceph_con_revoke(&req->r_osd->o_con, req->r_request); |
774 | req->r_sent = 0; | |
775 | } | |
422d2cb8 | 776 | list_del_init(&req->r_req_lru_item); |
f24e9980 SW |
777 | } |
778 | ||
779 | /* | |
780 | * Pick an osd (the first 'up' osd in the pg), allocate the osd struct | |
781 | * (as needed), and set the request r_osd appropriately. If there is | |
782 | * no up osd, set r_osd to NULL. | |
783 | * | |
784 | * Return 0 if unchanged, 1 if changed, or negative on error. | |
785 | * | |
786 | * Caller should hold map_sem for read and request_mutex. | |
787 | */ | |
788 | static int __map_osds(struct ceph_osd_client *osdc, | |
789 | struct ceph_osd_request *req) | |
790 | { | |
791 | struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base; | |
51042122 | 792 | struct ceph_pg pgid; |
d85b7056 SW |
793 | int acting[CEPH_PG_MAX_SIZE]; |
794 | int o = -1, num = 0; | |
f24e9980 | 795 | int err; |
f24e9980 SW |
796 | |
797 | dout("map_osds %p tid %lld\n", req, req->r_tid); | |
798 | err = ceph_calc_object_layout(&reqhead->layout, req->r_oid, | |
799 | &req->r_file_layout, osdc->osdmap); | |
800 | if (err) | |
801 | return err; | |
51042122 | 802 | pgid = reqhead->layout.ol_pgid; |
7740a42f SW |
803 | req->r_pgid = pgid; |
804 | ||
d85b7056 SW |
805 | err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting); |
806 | if (err > 0) { | |
807 | o = acting[0]; | |
808 | num = err; | |
809 | } | |
f24e9980 SW |
810 | |
811 | if ((req->r_osd && req->r_osd->o_osd == o && | |
d85b7056 SW |
812 | req->r_sent >= req->r_osd->o_incarnation && |
813 | req->r_num_pg_osds == num && | |
814 | memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) || | |
f24e9980 SW |
815 | (req->r_osd == NULL && o == -1)) |
816 | return 0; /* no change */ | |
817 | ||
51042122 SW |
818 | dout("map_osds tid %llu pgid %d.%x osd%d (was osd%d)\n", |
819 | req->r_tid, le32_to_cpu(pgid.pool), le16_to_cpu(pgid.ps), o, | |
f24e9980 SW |
820 | req->r_osd ? req->r_osd->o_osd : -1); |
821 | ||
d85b7056 SW |
822 | /* record full pg acting set */ |
823 | memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num); | |
824 | req->r_num_pg_osds = num; | |
825 | ||
f24e9980 SW |
826 | if (req->r_osd) { |
827 | __cancel_request(req); | |
828 | list_del_init(&req->r_osd_item); | |
f24e9980 SW |
829 | req->r_osd = NULL; |
830 | } | |
831 | ||
832 | req->r_osd = __lookup_osd(osdc, o); | |
833 | if (!req->r_osd && o >= 0) { | |
c99eb1c7 SW |
834 | err = -ENOMEM; |
835 | req->r_osd = create_osd(osdc); | |
836 | if (!req->r_osd) | |
837 | goto out; | |
f24e9980 SW |
838 | |
839 | dout("map_osds osd %p is osd%d\n", req->r_osd, o); | |
840 | req->r_osd->o_osd = o; | |
841 | req->r_osd->o_con.peer_name.num = cpu_to_le64(o); | |
842 | __insert_osd(osdc, req->r_osd); | |
843 | ||
844 | ceph_con_open(&req->r_osd->o_con, &osdc->osdmap->osd_addr[o]); | |
845 | } | |
846 | ||
f5a2041b YS |
847 | if (req->r_osd) { |
848 | __remove_osd_from_lru(req->r_osd); | |
f24e9980 | 849 | list_add(&req->r_osd_item, &req->r_osd->o_requests); |
f5a2041b | 850 | } |
d85b7056 | 851 | err = 1; /* osd or pg changed */ |
f24e9980 SW |
852 | |
853 | out: | |
f24e9980 SW |
854 | return err; |
855 | } | |
856 | ||
857 | /* | |
858 | * caller should hold map_sem (for read) and request_mutex | |
859 | */ | |
860 | static int __send_request(struct ceph_osd_client *osdc, | |
861 | struct ceph_osd_request *req) | |
862 | { | |
863 | struct ceph_osd_request_head *reqhead; | |
864 | int err; | |
865 | ||
866 | err = __map_osds(osdc, req); | |
867 | if (err < 0) | |
868 | return err; | |
869 | if (req->r_osd == NULL) { | |
870 | dout("send_request %p no up osds in pg\n", req); | |
871 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
872 | return 0; | |
873 | } | |
874 | ||
875 | dout("send_request %p tid %llu to osd%d flags %d\n", | |
876 | req, req->r_tid, req->r_osd->o_osd, req->r_flags); | |
877 | ||
878 | reqhead = req->r_request->front.iov_base; | |
879 | reqhead->osdmap_epoch = cpu_to_le32(osdc->osdmap->epoch); | |
880 | reqhead->flags |= cpu_to_le32(req->r_flags); /* e.g., RETRY */ | |
881 | reqhead->reassert_version = req->r_reassert_version; | |
882 | ||
3dd72fc0 | 883 | req->r_stamp = jiffies; |
07a27e22 | 884 | list_move_tail(&req->r_req_lru_item, &osdc->req_lru); |
f24e9980 SW |
885 | |
886 | ceph_msg_get(req->r_request); /* send consumes a ref */ | |
887 | ceph_con_send(&req->r_osd->o_con, req->r_request); | |
888 | req->r_sent = req->r_osd->o_incarnation; | |
889 | return 0; | |
890 | } | |
891 | ||
892 | /* | |
893 | * Timeout callback, called every N seconds when 1 or more osd | |
894 | * requests has been active for more than N seconds. When this | |
895 | * happens, we ping all OSDs with requests who have timed out to | |
896 | * ensure any communications channel reset is detected. Reset the | |
897 | * request timeouts another N seconds in the future as we go. | |
898 | * Reschedule the timeout event another N seconds in future (unless | |
899 | * there are no open requests). | |
900 | */ | |
901 | static void handle_timeout(struct work_struct *work) | |
902 | { | |
903 | struct ceph_osd_client *osdc = | |
904 | container_of(work, struct ceph_osd_client, timeout_work.work); | |
422d2cb8 | 905 | struct ceph_osd_request *req, *last_req = NULL; |
f24e9980 | 906 | struct ceph_osd *osd; |
3d14c5d2 | 907 | unsigned long timeout = osdc->client->options->osd_timeout * HZ; |
422d2cb8 | 908 | unsigned long keepalive = |
3d14c5d2 | 909 | osdc->client->options->osd_keepalive_timeout * HZ; |
3dd72fc0 | 910 | unsigned long last_stamp = 0; |
f24e9980 | 911 | struct rb_node *p; |
422d2cb8 | 912 | struct list_head slow_osds; |
f24e9980 SW |
913 | |
914 | dout("timeout\n"); | |
915 | down_read(&osdc->map_sem); | |
916 | ||
917 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
918 | ||
919 | mutex_lock(&osdc->request_mutex); | |
920 | for (p = rb_first(&osdc->requests); p; p = rb_next(p)) { | |
921 | req = rb_entry(p, struct ceph_osd_request, r_node); | |
922 | ||
923 | if (req->r_resend) { | |
924 | int err; | |
925 | ||
926 | dout("osdc resending prev failed %lld\n", req->r_tid); | |
927 | err = __send_request(osdc, req); | |
928 | if (err) | |
929 | dout("osdc failed again on %lld\n", req->r_tid); | |
930 | else | |
931 | req->r_resend = false; | |
932 | continue; | |
933 | } | |
934 | } | |
f24e9980 | 935 | |
422d2cb8 YS |
936 | /* |
937 | * reset osds that appear to be _really_ unresponsive. this | |
938 | * is a failsafe measure.. we really shouldn't be getting to | |
939 | * this point if the system is working properly. the monitors | |
940 | * should mark the osd as failed and we should find out about | |
941 | * it from an updated osd map. | |
942 | */ | |
f26e681d | 943 | while (timeout && !list_empty(&osdc->req_lru)) { |
422d2cb8 YS |
944 | req = list_entry(osdc->req_lru.next, struct ceph_osd_request, |
945 | r_req_lru_item); | |
946 | ||
3dd72fc0 | 947 | if (time_before(jiffies, req->r_stamp + timeout)) |
422d2cb8 YS |
948 | break; |
949 | ||
3dd72fc0 | 950 | BUG_ON(req == last_req && req->r_stamp == last_stamp); |
422d2cb8 | 951 | last_req = req; |
3dd72fc0 | 952 | last_stamp = req->r_stamp; |
422d2cb8 YS |
953 | |
954 | osd = req->r_osd; | |
955 | BUG_ON(!osd); | |
956 | pr_warning(" tid %llu timed out on osd%d, will reset osd\n", | |
957 | req->r_tid, osd->o_osd); | |
958 | __kick_requests(osdc, osd); | |
959 | } | |
960 | ||
961 | /* | |
962 | * ping osds that are a bit slow. this ensures that if there | |
963 | * is a break in the TCP connection we will notice, and reopen | |
964 | * a connection with that osd (from the fault callback). | |
965 | */ | |
966 | INIT_LIST_HEAD(&slow_osds); | |
967 | list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) { | |
3dd72fc0 | 968 | if (time_before(jiffies, req->r_stamp + keepalive)) |
422d2cb8 YS |
969 | break; |
970 | ||
971 | osd = req->r_osd; | |
972 | BUG_ON(!osd); | |
973 | dout(" tid %llu is slow, will send keepalive on osd%d\n", | |
f24e9980 | 974 | req->r_tid, osd->o_osd); |
422d2cb8 YS |
975 | list_move_tail(&osd->o_keepalive_item, &slow_osds); |
976 | } | |
977 | while (!list_empty(&slow_osds)) { | |
978 | osd = list_entry(slow_osds.next, struct ceph_osd, | |
979 | o_keepalive_item); | |
980 | list_del_init(&osd->o_keepalive_item); | |
f24e9980 SW |
981 | ceph_con_keepalive(&osd->o_con); |
982 | } | |
983 | ||
422d2cb8 | 984 | __schedule_osd_timeout(osdc); |
f24e9980 SW |
985 | mutex_unlock(&osdc->request_mutex); |
986 | ||
987 | up_read(&osdc->map_sem); | |
988 | } | |
989 | ||
f5a2041b YS |
990 | static void handle_osds_timeout(struct work_struct *work) |
991 | { | |
992 | struct ceph_osd_client *osdc = | |
993 | container_of(work, struct ceph_osd_client, | |
994 | osds_timeout_work.work); | |
995 | unsigned long delay = | |
3d14c5d2 | 996 | osdc->client->options->osd_idle_ttl * HZ >> 2; |
f5a2041b YS |
997 | |
998 | dout("osds timeout\n"); | |
999 | down_read(&osdc->map_sem); | |
1000 | remove_old_osds(osdc, 0); | |
1001 | up_read(&osdc->map_sem); | |
1002 | ||
1003 | schedule_delayed_work(&osdc->osds_timeout_work, | |
1004 | round_jiffies_relative(delay)); | |
1005 | } | |
1006 | ||
f24e9980 SW |
1007 | /* |
1008 | * handle osd op reply. either call the callback if it is specified, | |
1009 | * or do the completion to wake up the waiting thread. | |
1010 | */ | |
350b1c32 SW |
1011 | static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg, |
1012 | struct ceph_connection *con) | |
f24e9980 SW |
1013 | { |
1014 | struct ceph_osd_reply_head *rhead = msg->front.iov_base; | |
1015 | struct ceph_osd_request *req; | |
1016 | u64 tid; | |
1017 | int numops, object_len, flags; | |
0ceed5db | 1018 | s32 result; |
f24e9980 | 1019 | |
6df058c0 | 1020 | tid = le64_to_cpu(msg->hdr.tid); |
f24e9980 SW |
1021 | if (msg->front.iov_len < sizeof(*rhead)) |
1022 | goto bad; | |
f24e9980 SW |
1023 | numops = le32_to_cpu(rhead->num_ops); |
1024 | object_len = le32_to_cpu(rhead->object_len); | |
0ceed5db | 1025 | result = le32_to_cpu(rhead->result); |
f24e9980 SW |
1026 | if (msg->front.iov_len != sizeof(*rhead) + object_len + |
1027 | numops * sizeof(struct ceph_osd_op)) | |
1028 | goto bad; | |
0ceed5db | 1029 | dout("handle_reply %p tid %llu result %d\n", msg, tid, (int)result); |
f24e9980 SW |
1030 | |
1031 | /* lookup */ | |
1032 | mutex_lock(&osdc->request_mutex); | |
1033 | req = __lookup_request(osdc, tid); | |
1034 | if (req == NULL) { | |
1035 | dout("handle_reply tid %llu dne\n", tid); | |
1036 | mutex_unlock(&osdc->request_mutex); | |
1037 | return; | |
1038 | } | |
1039 | ceph_osdc_get_request(req); | |
1040 | flags = le32_to_cpu(rhead->flags); | |
1041 | ||
350b1c32 | 1042 | /* |
0d59ab81 | 1043 | * if this connection filled our message, drop our reference now, to |
350b1c32 SW |
1044 | * avoid a (safe but slower) revoke later. |
1045 | */ | |
0d59ab81 | 1046 | if (req->r_con_filling_msg == con && req->r_reply == msg) { |
c16e7869 | 1047 | dout(" dropping con_filling_msg ref %p\n", con); |
0d59ab81 | 1048 | req->r_con_filling_msg = NULL; |
350b1c32 SW |
1049 | ceph_con_put(con); |
1050 | } | |
1051 | ||
f24e9980 SW |
1052 | if (!req->r_got_reply) { |
1053 | unsigned bytes; | |
1054 | ||
1055 | req->r_result = le32_to_cpu(rhead->result); | |
1056 | bytes = le32_to_cpu(msg->hdr.data_len); | |
1057 | dout("handle_reply result %d bytes %d\n", req->r_result, | |
1058 | bytes); | |
1059 | if (req->r_result == 0) | |
1060 | req->r_result = bytes; | |
1061 | ||
1062 | /* in case this is a write and we need to replay, */ | |
1063 | req->r_reassert_version = rhead->reassert_version; | |
1064 | ||
1065 | req->r_got_reply = 1; | |
1066 | } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) { | |
1067 | dout("handle_reply tid %llu dup ack\n", tid); | |
34b43a56 | 1068 | mutex_unlock(&osdc->request_mutex); |
f24e9980 SW |
1069 | goto done; |
1070 | } | |
1071 | ||
1072 | dout("handle_reply tid %llu flags %d\n", tid, flags); | |
1073 | ||
1074 | /* either this is a read, or we got the safe response */ | |
0ceed5db SW |
1075 | if (result < 0 || |
1076 | (flags & CEPH_OSD_FLAG_ONDISK) || | |
f24e9980 SW |
1077 | ((flags & CEPH_OSD_FLAG_WRITE) == 0)) |
1078 | __unregister_request(osdc, req); | |
1079 | ||
1080 | mutex_unlock(&osdc->request_mutex); | |
1081 | ||
1082 | if (req->r_callback) | |
1083 | req->r_callback(req, msg); | |
1084 | else | |
03066f23 | 1085 | complete_all(&req->r_completion); |
f24e9980 SW |
1086 | |
1087 | if (flags & CEPH_OSD_FLAG_ONDISK) { | |
1088 | if (req->r_safe_callback) | |
1089 | req->r_safe_callback(req, msg); | |
03066f23 | 1090 | complete_all(&req->r_safe_completion); /* fsync waiter */ |
f24e9980 SW |
1091 | } |
1092 | ||
1093 | done: | |
1094 | ceph_osdc_put_request(req); | |
1095 | return; | |
1096 | ||
1097 | bad: | |
1098 | pr_err("corrupt osd_op_reply got %d %d expected %d\n", | |
1099 | (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len), | |
1100 | (int)sizeof(*rhead)); | |
9ec7cab1 | 1101 | ceph_msg_dump(msg); |
f24e9980 SW |
1102 | } |
1103 | ||
1104 | ||
422d2cb8 | 1105 | static int __kick_requests(struct ceph_osd_client *osdc, |
f24e9980 SW |
1106 | struct ceph_osd *kickosd) |
1107 | { | |
1108 | struct ceph_osd_request *req; | |
1109 | struct rb_node *p, *n; | |
1110 | int needmap = 0; | |
1111 | int err; | |
1112 | ||
1113 | dout("kick_requests osd%d\n", kickosd ? kickosd->o_osd : -1); | |
153a008b | 1114 | if (kickosd) { |
87b315a5 SW |
1115 | err = __reset_osd(osdc, kickosd); |
1116 | if (err == -EAGAIN) | |
1117 | return 1; | |
153a008b | 1118 | } else { |
f24e9980 SW |
1119 | for (p = rb_first(&osdc->osds); p; p = n) { |
1120 | struct ceph_osd *osd = | |
1121 | rb_entry(p, struct ceph_osd, o_node); | |
1122 | ||
1123 | n = rb_next(p); | |
1124 | if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || | |
103e2d3a SW |
1125 | memcmp(&osd->o_con.peer_addr, |
1126 | ceph_osd_addr(osdc->osdmap, | |
1127 | osd->o_osd), | |
1128 | sizeof(struct ceph_entity_addr)) != 0) | |
f5a2041b | 1129 | __reset_osd(osdc, osd); |
f24e9980 SW |
1130 | } |
1131 | } | |
1132 | ||
1133 | for (p = rb_first(&osdc->requests); p; p = rb_next(p)) { | |
1134 | req = rb_entry(p, struct ceph_osd_request, r_node); | |
1135 | ||
1136 | if (req->r_resend) { | |
1137 | dout(" r_resend set on tid %llu\n", req->r_tid); | |
266673db | 1138 | __cancel_request(req); |
f24e9980 SW |
1139 | goto kick; |
1140 | } | |
266673db SW |
1141 | if (req->r_osd && kickosd == req->r_osd) { |
1142 | __cancel_request(req); | |
f24e9980 | 1143 | goto kick; |
266673db | 1144 | } |
f24e9980 SW |
1145 | |
1146 | err = __map_osds(osdc, req); | |
1147 | if (err == 0) | |
1148 | continue; /* no change */ | |
1149 | if (err < 0) { | |
1150 | /* | |
1151 | * FIXME: really, we should set the request | |
1152 | * error and fail if this isn't a 'nofail' | |
1153 | * request, but that's a fair bit more | |
1154 | * complicated to do. So retry! | |
1155 | */ | |
1156 | dout(" setting r_resend on %llu\n", req->r_tid); | |
1157 | req->r_resend = true; | |
1158 | continue; | |
1159 | } | |
1160 | if (req->r_osd == NULL) { | |
1161 | dout("tid %llu maps to no valid osd\n", req->r_tid); | |
1162 | needmap++; /* request a newer map */ | |
1163 | continue; | |
1164 | } | |
1165 | ||
1166 | kick: | |
c1ea8823 | 1167 | dout("kicking %p tid %llu osd%d\n", req, req->r_tid, |
12eadc19 | 1168 | req->r_osd ? req->r_osd->o_osd : -1); |
f24e9980 SW |
1169 | req->r_flags |= CEPH_OSD_FLAG_RETRY; |
1170 | err = __send_request(osdc, req); | |
1171 | if (err) { | |
1172 | dout(" setting r_resend on %llu\n", req->r_tid); | |
1173 | req->r_resend = true; | |
1174 | } | |
1175 | } | |
422d2cb8 YS |
1176 | |
1177 | return needmap; | |
1178 | } | |
1179 | ||
1180 | /* | |
1181 | * Resubmit osd requests whose osd or osd address has changed. Request | |
1182 | * a new osd map if osds are down, or we are otherwise unable to determine | |
1183 | * how to direct a request. | |
1184 | * | |
1185 | * Close connections to down osds. | |
1186 | * | |
1187 | * If @who is specified, resubmit requests for that specific osd. | |
1188 | * | |
1189 | * Caller should hold map_sem for read and request_mutex. | |
1190 | */ | |
1191 | static void kick_requests(struct ceph_osd_client *osdc, | |
1192 | struct ceph_osd *kickosd) | |
1193 | { | |
1194 | int needmap; | |
1195 | ||
1196 | mutex_lock(&osdc->request_mutex); | |
1197 | needmap = __kick_requests(osdc, kickosd); | |
f24e9980 SW |
1198 | mutex_unlock(&osdc->request_mutex); |
1199 | ||
1200 | if (needmap) { | |
1201 | dout("%d requests for down osds, need new map\n", needmap); | |
1202 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1203 | } | |
f24e9980 | 1204 | |
422d2cb8 | 1205 | } |
f24e9980 SW |
1206 | /* |
1207 | * Process updated osd map. | |
1208 | * | |
1209 | * The message contains any number of incremental and full maps, normally | |
1210 | * indicating some sort of topology change in the cluster. Kick requests | |
1211 | * off to different OSDs as needed. | |
1212 | */ | |
1213 | void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) | |
1214 | { | |
1215 | void *p, *end, *next; | |
1216 | u32 nr_maps, maplen; | |
1217 | u32 epoch; | |
1218 | struct ceph_osdmap *newmap = NULL, *oldmap; | |
1219 | int err; | |
1220 | struct ceph_fsid fsid; | |
1221 | ||
1222 | dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0); | |
1223 | p = msg->front.iov_base; | |
1224 | end = p + msg->front.iov_len; | |
1225 | ||
1226 | /* verify fsid */ | |
1227 | ceph_decode_need(&p, end, sizeof(fsid), bad); | |
1228 | ceph_decode_copy(&p, &fsid, sizeof(fsid)); | |
0743304d SW |
1229 | if (ceph_check_fsid(osdc->client, &fsid) < 0) |
1230 | return; | |
f24e9980 SW |
1231 | |
1232 | down_write(&osdc->map_sem); | |
1233 | ||
1234 | /* incremental maps */ | |
1235 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
1236 | dout(" %d inc maps\n", nr_maps); | |
1237 | while (nr_maps > 0) { | |
1238 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
1239 | epoch = ceph_decode_32(&p); |
1240 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
1241 | ceph_decode_need(&p, end, maplen, bad); |
1242 | next = p + maplen; | |
1243 | if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) { | |
1244 | dout("applying incremental map %u len %d\n", | |
1245 | epoch, maplen); | |
1246 | newmap = osdmap_apply_incremental(&p, next, | |
1247 | osdc->osdmap, | |
1248 | osdc->client->msgr); | |
1249 | if (IS_ERR(newmap)) { | |
1250 | err = PTR_ERR(newmap); | |
1251 | goto bad; | |
1252 | } | |
30dc6381 | 1253 | BUG_ON(!newmap); |
f24e9980 SW |
1254 | if (newmap != osdc->osdmap) { |
1255 | ceph_osdmap_destroy(osdc->osdmap); | |
1256 | osdc->osdmap = newmap; | |
1257 | } | |
1258 | } else { | |
1259 | dout("ignoring incremental map %u len %d\n", | |
1260 | epoch, maplen); | |
1261 | } | |
1262 | p = next; | |
1263 | nr_maps--; | |
1264 | } | |
1265 | if (newmap) | |
1266 | goto done; | |
1267 | ||
1268 | /* full maps */ | |
1269 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
1270 | dout(" %d full maps\n", nr_maps); | |
1271 | while (nr_maps) { | |
1272 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
1273 | epoch = ceph_decode_32(&p); |
1274 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
1275 | ceph_decode_need(&p, end, maplen, bad); |
1276 | if (nr_maps > 1) { | |
1277 | dout("skipping non-latest full map %u len %d\n", | |
1278 | epoch, maplen); | |
1279 | } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) { | |
1280 | dout("skipping full map %u len %d, " | |
1281 | "older than our %u\n", epoch, maplen, | |
1282 | osdc->osdmap->epoch); | |
1283 | } else { | |
1284 | dout("taking full map %u len %d\n", epoch, maplen); | |
1285 | newmap = osdmap_decode(&p, p+maplen); | |
1286 | if (IS_ERR(newmap)) { | |
1287 | err = PTR_ERR(newmap); | |
1288 | goto bad; | |
1289 | } | |
30dc6381 | 1290 | BUG_ON(!newmap); |
f24e9980 SW |
1291 | oldmap = osdc->osdmap; |
1292 | osdc->osdmap = newmap; | |
1293 | if (oldmap) | |
1294 | ceph_osdmap_destroy(oldmap); | |
1295 | } | |
1296 | p += maplen; | |
1297 | nr_maps--; | |
1298 | } | |
1299 | ||
1300 | done: | |
1301 | downgrade_write(&osdc->map_sem); | |
1302 | ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch); | |
1303 | if (newmap) | |
1304 | kick_requests(osdc, NULL); | |
1305 | up_read(&osdc->map_sem); | |
03066f23 | 1306 | wake_up_all(&osdc->client->auth_wq); |
f24e9980 SW |
1307 | return; |
1308 | ||
1309 | bad: | |
1310 | pr_err("osdc handle_map corrupt msg\n"); | |
9ec7cab1 | 1311 | ceph_msg_dump(msg); |
f24e9980 SW |
1312 | up_write(&osdc->map_sem); |
1313 | return; | |
1314 | } | |
1315 | ||
f24e9980 SW |
1316 | /* |
1317 | * Register request, send initial attempt. | |
1318 | */ | |
1319 | int ceph_osdc_start_request(struct ceph_osd_client *osdc, | |
1320 | struct ceph_osd_request *req, | |
1321 | bool nofail) | |
1322 | { | |
c1ea8823 | 1323 | int rc = 0; |
f24e9980 SW |
1324 | |
1325 | req->r_request->pages = req->r_pages; | |
1326 | req->r_request->nr_pages = req->r_num_pages; | |
68b4476b YS |
1327 | #ifdef CONFIG_BLOCK |
1328 | req->r_request->bio = req->r_bio; | |
1329 | #endif | |
1330 | req->r_request->trail = req->r_trail; | |
f24e9980 SW |
1331 | |
1332 | register_request(osdc, req); | |
1333 | ||
1334 | down_read(&osdc->map_sem); | |
1335 | mutex_lock(&osdc->request_mutex); | |
c1ea8823 SW |
1336 | /* |
1337 | * a racing kick_requests() may have sent the message for us | |
1338 | * while we dropped request_mutex above, so only send now if | |
1339 | * the request still han't been touched yet. | |
1340 | */ | |
1341 | if (req->r_sent == 0) { | |
1342 | rc = __send_request(osdc, req); | |
1343 | if (rc) { | |
1344 | if (nofail) { | |
1345 | dout("osdc_start_request failed send, " | |
1346 | " marking %lld\n", req->r_tid); | |
1347 | req->r_resend = true; | |
1348 | rc = 0; | |
1349 | } else { | |
1350 | __unregister_request(osdc, req); | |
1351 | } | |
f24e9980 SW |
1352 | } |
1353 | } | |
1354 | mutex_unlock(&osdc->request_mutex); | |
1355 | up_read(&osdc->map_sem); | |
1356 | return rc; | |
1357 | } | |
3d14c5d2 | 1358 | EXPORT_SYMBOL(ceph_osdc_start_request); |
f24e9980 SW |
1359 | |
1360 | /* | |
1361 | * wait for a request to complete | |
1362 | */ | |
1363 | int ceph_osdc_wait_request(struct ceph_osd_client *osdc, | |
1364 | struct ceph_osd_request *req) | |
1365 | { | |
1366 | int rc; | |
1367 | ||
1368 | rc = wait_for_completion_interruptible(&req->r_completion); | |
1369 | if (rc < 0) { | |
1370 | mutex_lock(&osdc->request_mutex); | |
1371 | __cancel_request(req); | |
529cfcc4 | 1372 | __unregister_request(osdc, req); |
f24e9980 | 1373 | mutex_unlock(&osdc->request_mutex); |
529cfcc4 | 1374 | dout("wait_request tid %llu canceled/timed out\n", req->r_tid); |
f24e9980 SW |
1375 | return rc; |
1376 | } | |
1377 | ||
1378 | dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result); | |
1379 | return req->r_result; | |
1380 | } | |
3d14c5d2 | 1381 | EXPORT_SYMBOL(ceph_osdc_wait_request); |
f24e9980 SW |
1382 | |
1383 | /* | |
1384 | * sync - wait for all in-flight requests to flush. avoid starvation. | |
1385 | */ | |
1386 | void ceph_osdc_sync(struct ceph_osd_client *osdc) | |
1387 | { | |
1388 | struct ceph_osd_request *req; | |
1389 | u64 last_tid, next_tid = 0; | |
1390 | ||
1391 | mutex_lock(&osdc->request_mutex); | |
1392 | last_tid = osdc->last_tid; | |
1393 | while (1) { | |
1394 | req = __lookup_request_ge(osdc, next_tid); | |
1395 | if (!req) | |
1396 | break; | |
1397 | if (req->r_tid > last_tid) | |
1398 | break; | |
1399 | ||
1400 | next_tid = req->r_tid + 1; | |
1401 | if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0) | |
1402 | continue; | |
1403 | ||
1404 | ceph_osdc_get_request(req); | |
1405 | mutex_unlock(&osdc->request_mutex); | |
1406 | dout("sync waiting on tid %llu (last is %llu)\n", | |
1407 | req->r_tid, last_tid); | |
1408 | wait_for_completion(&req->r_safe_completion); | |
1409 | mutex_lock(&osdc->request_mutex); | |
1410 | ceph_osdc_put_request(req); | |
1411 | } | |
1412 | mutex_unlock(&osdc->request_mutex); | |
1413 | dout("sync done (thru tid %llu)\n", last_tid); | |
1414 | } | |
3d14c5d2 | 1415 | EXPORT_SYMBOL(ceph_osdc_sync); |
f24e9980 SW |
1416 | |
1417 | /* | |
1418 | * init, shutdown | |
1419 | */ | |
1420 | int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) | |
1421 | { | |
1422 | int err; | |
1423 | ||
1424 | dout("init\n"); | |
1425 | osdc->client = client; | |
1426 | osdc->osdmap = NULL; | |
1427 | init_rwsem(&osdc->map_sem); | |
1428 | init_completion(&osdc->map_waiters); | |
1429 | osdc->last_requested_map = 0; | |
1430 | mutex_init(&osdc->request_mutex); | |
f24e9980 SW |
1431 | osdc->last_tid = 0; |
1432 | osdc->osds = RB_ROOT; | |
f5a2041b | 1433 | INIT_LIST_HEAD(&osdc->osd_lru); |
f24e9980 | 1434 | osdc->requests = RB_ROOT; |
422d2cb8 | 1435 | INIT_LIST_HEAD(&osdc->req_lru); |
f24e9980 SW |
1436 | osdc->num_requests = 0; |
1437 | INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); | |
f5a2041b YS |
1438 | INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); |
1439 | ||
1440 | schedule_delayed_work(&osdc->osds_timeout_work, | |
3d14c5d2 | 1441 | round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ)); |
f24e9980 | 1442 | |
5f44f142 | 1443 | err = -ENOMEM; |
f24e9980 SW |
1444 | osdc->req_mempool = mempool_create_kmalloc_pool(10, |
1445 | sizeof(struct ceph_osd_request)); | |
1446 | if (!osdc->req_mempool) | |
5f44f142 | 1447 | goto out; |
f24e9980 | 1448 | |
4f48280e SW |
1449 | err = ceph_msgpool_init(&osdc->msgpool_op, OSD_OP_FRONT_LEN, 10, true, |
1450 | "osd_op"); | |
f24e9980 | 1451 | if (err < 0) |
5f44f142 | 1452 | goto out_mempool; |
c16e7869 | 1453 | err = ceph_msgpool_init(&osdc->msgpool_op_reply, |
4f48280e SW |
1454 | OSD_OPREPLY_FRONT_LEN, 10, true, |
1455 | "osd_op_reply"); | |
c16e7869 SW |
1456 | if (err < 0) |
1457 | goto out_msgpool; | |
f24e9980 | 1458 | return 0; |
5f44f142 | 1459 | |
c16e7869 SW |
1460 | out_msgpool: |
1461 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
5f44f142 SW |
1462 | out_mempool: |
1463 | mempool_destroy(osdc->req_mempool); | |
1464 | out: | |
1465 | return err; | |
f24e9980 | 1466 | } |
3d14c5d2 | 1467 | EXPORT_SYMBOL(ceph_osdc_init); |
f24e9980 SW |
1468 | |
1469 | void ceph_osdc_stop(struct ceph_osd_client *osdc) | |
1470 | { | |
1471 | cancel_delayed_work_sync(&osdc->timeout_work); | |
f5a2041b | 1472 | cancel_delayed_work_sync(&osdc->osds_timeout_work); |
f24e9980 SW |
1473 | if (osdc->osdmap) { |
1474 | ceph_osdmap_destroy(osdc->osdmap); | |
1475 | osdc->osdmap = NULL; | |
1476 | } | |
f5a2041b | 1477 | remove_old_osds(osdc, 1); |
f24e9980 SW |
1478 | mempool_destroy(osdc->req_mempool); |
1479 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
c16e7869 | 1480 | ceph_msgpool_destroy(&osdc->msgpool_op_reply); |
f24e9980 | 1481 | } |
3d14c5d2 | 1482 | EXPORT_SYMBOL(ceph_osdc_stop); |
f24e9980 SW |
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 | } | |
3d14c5d2 | 1520 | EXPORT_SYMBOL(ceph_osdc_readpages); |
f24e9980 SW |
1521 | |
1522 | /* | |
1523 | * do a synchronous write on N pages | |
1524 | */ | |
1525 | int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, | |
1526 | struct ceph_file_layout *layout, | |
1527 | struct ceph_snap_context *snapc, | |
1528 | u64 off, u64 len, | |
1529 | u32 truncate_seq, u64 truncate_size, | |
1530 | struct timespec *mtime, | |
1531 | struct page **pages, int num_pages, | |
1532 | int flags, int do_sync, bool nofail) | |
1533 | { | |
1534 | struct ceph_osd_request *req; | |
1535 | int rc = 0; | |
1536 | ||
1537 | BUG_ON(vino.snap != CEPH_NOSNAP); | |
1538 | req = ceph_osdc_new_request(osdc, layout, vino, off, &len, | |
1539 | CEPH_OSD_OP_WRITE, | |
1540 | flags | CEPH_OSD_FLAG_ONDISK | | |
1541 | CEPH_OSD_FLAG_WRITE, | |
1542 | snapc, do_sync, | |
1543 | truncate_seq, truncate_size, mtime, | |
1544 | nofail, 1); | |
a79832f2 SW |
1545 | if (!req) |
1546 | return -ENOMEM; | |
f24e9980 SW |
1547 | |
1548 | /* it may be a short write due to an object boundary */ | |
1549 | req->r_pages = pages; | |
f24e9980 SW |
1550 | dout("writepages %llu~%llu (%d pages)\n", off, len, |
1551 | req->r_num_pages); | |
1552 | ||
1553 | rc = ceph_osdc_start_request(osdc, req, nofail); | |
1554 | if (!rc) | |
1555 | rc = ceph_osdc_wait_request(osdc, req); | |
1556 | ||
1557 | ceph_osdc_put_request(req); | |
1558 | if (rc == 0) | |
1559 | rc = len; | |
1560 | dout("writepages result %d\n", rc); | |
1561 | return rc; | |
1562 | } | |
3d14c5d2 | 1563 | EXPORT_SYMBOL(ceph_osdc_writepages); |
f24e9980 SW |
1564 | |
1565 | /* | |
1566 | * handle incoming message | |
1567 | */ | |
1568 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
1569 | { | |
1570 | struct ceph_osd *osd = con->private; | |
32c895e7 | 1571 | struct ceph_osd_client *osdc; |
f24e9980 SW |
1572 | int type = le16_to_cpu(msg->hdr.type); |
1573 | ||
1574 | if (!osd) | |
4a32f93d | 1575 | goto out; |
32c895e7 | 1576 | osdc = osd->o_osdc; |
f24e9980 SW |
1577 | |
1578 | switch (type) { | |
1579 | case CEPH_MSG_OSD_MAP: | |
1580 | ceph_osdc_handle_map(osdc, msg); | |
1581 | break; | |
1582 | case CEPH_MSG_OSD_OPREPLY: | |
350b1c32 | 1583 | handle_reply(osdc, msg, con); |
f24e9980 SW |
1584 | break; |
1585 | ||
1586 | default: | |
1587 | pr_err("received unknown message type %d %s\n", type, | |
1588 | ceph_msg_type_name(type)); | |
1589 | } | |
4a32f93d | 1590 | out: |
f24e9980 SW |
1591 | ceph_msg_put(msg); |
1592 | } | |
1593 | ||
5b3a4db3 | 1594 | /* |
21b667f6 SW |
1595 | * lookup and return message for incoming reply. set up reply message |
1596 | * pages. | |
5b3a4db3 SW |
1597 | */ |
1598 | static struct ceph_msg *get_reply(struct ceph_connection *con, | |
2450418c YS |
1599 | struct ceph_msg_header *hdr, |
1600 | int *skip) | |
f24e9980 SW |
1601 | { |
1602 | struct ceph_osd *osd = con->private; | |
1603 | struct ceph_osd_client *osdc = osd->o_osdc; | |
2450418c | 1604 | struct ceph_msg *m; |
0547a9b3 | 1605 | struct ceph_osd_request *req; |
5b3a4db3 SW |
1606 | int front = le32_to_cpu(hdr->front_len); |
1607 | int data_len = le32_to_cpu(hdr->data_len); | |
0547a9b3 | 1608 | u64 tid; |
f24e9980 | 1609 | |
0547a9b3 YS |
1610 | tid = le64_to_cpu(hdr->tid); |
1611 | mutex_lock(&osdc->request_mutex); | |
1612 | req = __lookup_request(osdc, tid); | |
1613 | if (!req) { | |
1614 | *skip = 1; | |
1615 | m = NULL; | |
c16e7869 | 1616 | pr_info("get_reply unknown tid %llu from osd%d\n", tid, |
5b3a4db3 | 1617 | osd->o_osd); |
0547a9b3 YS |
1618 | goto out; |
1619 | } | |
c16e7869 SW |
1620 | |
1621 | if (req->r_con_filling_msg) { | |
1622 | dout("get_reply revoking msg %p from old con %p\n", | |
1623 | req->r_reply, req->r_con_filling_msg); | |
1624 | ceph_con_revoke_message(req->r_con_filling_msg, req->r_reply); | |
1625 | ceph_con_put(req->r_con_filling_msg); | |
6f46cb29 | 1626 | req->r_con_filling_msg = NULL; |
0547a9b3 YS |
1627 | } |
1628 | ||
c16e7869 SW |
1629 | if (front > req->r_reply->front.iov_len) { |
1630 | pr_warning("get_reply front %d > preallocated %d\n", | |
1631 | front, (int)req->r_reply->front.iov_len); | |
34d23762 | 1632 | m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS); |
a79832f2 | 1633 | if (!m) |
c16e7869 SW |
1634 | goto out; |
1635 | ceph_msg_put(req->r_reply); | |
1636 | req->r_reply = m; | |
1637 | } | |
1638 | m = ceph_msg_get(req->r_reply); | |
1639 | ||
0547a9b3 | 1640 | if (data_len > 0) { |
21b667f6 SW |
1641 | unsigned data_off = le16_to_cpu(hdr->data_off); |
1642 | int want = calc_pages_for(data_off & ~PAGE_MASK, data_len); | |
1643 | ||
1644 | if (unlikely(req->r_num_pages < want)) { | |
1645 | pr_warning("tid %lld reply %d > expected %d pages\n", | |
1646 | tid, want, m->nr_pages); | |
0547a9b3 YS |
1647 | *skip = 1; |
1648 | ceph_msg_put(m); | |
a79832f2 | 1649 | m = NULL; |
21b667f6 | 1650 | goto out; |
0547a9b3 | 1651 | } |
21b667f6 SW |
1652 | m->pages = req->r_pages; |
1653 | m->nr_pages = req->r_num_pages; | |
68b4476b YS |
1654 | #ifdef CONFIG_BLOCK |
1655 | m->bio = req->r_bio; | |
1656 | #endif | |
0547a9b3 | 1657 | } |
5b3a4db3 | 1658 | *skip = 0; |
c16e7869 SW |
1659 | req->r_con_filling_msg = ceph_con_get(con); |
1660 | dout("get_reply tid %lld %p\n", tid, m); | |
0547a9b3 YS |
1661 | |
1662 | out: | |
1663 | mutex_unlock(&osdc->request_mutex); | |
2450418c | 1664 | return m; |
5b3a4db3 SW |
1665 | |
1666 | } | |
1667 | ||
1668 | static struct ceph_msg *alloc_msg(struct ceph_connection *con, | |
1669 | struct ceph_msg_header *hdr, | |
1670 | int *skip) | |
1671 | { | |
1672 | struct ceph_osd *osd = con->private; | |
1673 | int type = le16_to_cpu(hdr->type); | |
1674 | int front = le32_to_cpu(hdr->front_len); | |
1675 | ||
1676 | switch (type) { | |
1677 | case CEPH_MSG_OSD_MAP: | |
34d23762 | 1678 | return ceph_msg_new(type, front, GFP_NOFS); |
5b3a4db3 SW |
1679 | case CEPH_MSG_OSD_OPREPLY: |
1680 | return get_reply(con, hdr, skip); | |
1681 | default: | |
1682 | pr_info("alloc_msg unexpected msg type %d from osd%d\n", type, | |
1683 | osd->o_osd); | |
1684 | *skip = 1; | |
1685 | return NULL; | |
1686 | } | |
f24e9980 SW |
1687 | } |
1688 | ||
1689 | /* | |
1690 | * Wrappers to refcount containing ceph_osd struct | |
1691 | */ | |
1692 | static struct ceph_connection *get_osd_con(struct ceph_connection *con) | |
1693 | { | |
1694 | struct ceph_osd *osd = con->private; | |
1695 | if (get_osd(osd)) | |
1696 | return con; | |
1697 | return NULL; | |
1698 | } | |
1699 | ||
1700 | static void put_osd_con(struct ceph_connection *con) | |
1701 | { | |
1702 | struct ceph_osd *osd = con->private; | |
1703 | put_osd(osd); | |
1704 | } | |
1705 | ||
4e7a5dcd SW |
1706 | /* |
1707 | * authentication | |
1708 | */ | |
1709 | static int get_authorizer(struct ceph_connection *con, | |
213c99ee SW |
1710 | void **buf, int *len, int *proto, |
1711 | void **reply_buf, int *reply_len, int force_new) | |
4e7a5dcd SW |
1712 | { |
1713 | struct ceph_osd *o = con->private; | |
1714 | struct ceph_osd_client *osdc = o->o_osdc; | |
1715 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
1716 | int ret = 0; | |
1717 | ||
1718 | if (force_new && o->o_authorizer) { | |
1719 | ac->ops->destroy_authorizer(ac, o->o_authorizer); | |
1720 | o->o_authorizer = NULL; | |
1721 | } | |
1722 | if (o->o_authorizer == NULL) { | |
1723 | ret = ac->ops->create_authorizer( | |
1724 | ac, CEPH_ENTITY_TYPE_OSD, | |
1725 | &o->o_authorizer, | |
1726 | &o->o_authorizer_buf, | |
1727 | &o->o_authorizer_buf_len, | |
1728 | &o->o_authorizer_reply_buf, | |
1729 | &o->o_authorizer_reply_buf_len); | |
1730 | if (ret) | |
213c99ee | 1731 | return ret; |
4e7a5dcd SW |
1732 | } |
1733 | ||
1734 | *proto = ac->protocol; | |
1735 | *buf = o->o_authorizer_buf; | |
1736 | *len = o->o_authorizer_buf_len; | |
1737 | *reply_buf = o->o_authorizer_reply_buf; | |
1738 | *reply_len = o->o_authorizer_reply_buf_len; | |
1739 | return 0; | |
1740 | } | |
1741 | ||
1742 | ||
1743 | static int verify_authorizer_reply(struct ceph_connection *con, int len) | |
1744 | { | |
1745 | struct ceph_osd *o = con->private; | |
1746 | struct ceph_osd_client *osdc = o->o_osdc; | |
1747 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
1748 | ||
1749 | return ac->ops->verify_authorizer_reply(ac, o->o_authorizer, len); | |
1750 | } | |
1751 | ||
9bd2e6f8 SW |
1752 | static int invalidate_authorizer(struct ceph_connection *con) |
1753 | { | |
1754 | struct ceph_osd *o = con->private; | |
1755 | struct ceph_osd_client *osdc = o->o_osdc; | |
1756 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
1757 | ||
1758 | if (ac->ops->invalidate_authorizer) | |
1759 | ac->ops->invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); | |
1760 | ||
1761 | return ceph_monc_validate_auth(&osdc->client->monc); | |
1762 | } | |
4e7a5dcd | 1763 | |
9e32789f | 1764 | static const struct ceph_connection_operations osd_con_ops = { |
f24e9980 SW |
1765 | .get = get_osd_con, |
1766 | .put = put_osd_con, | |
1767 | .dispatch = dispatch, | |
4e7a5dcd SW |
1768 | .get_authorizer = get_authorizer, |
1769 | .verify_authorizer_reply = verify_authorizer_reply, | |
9bd2e6f8 | 1770 | .invalidate_authorizer = invalidate_authorizer, |
f24e9980 | 1771 | .alloc_msg = alloc_msg, |
81b024e7 | 1772 | .fault = osd_reset, |
f24e9980 | 1773 | }; |