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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; |
f24e9980 | 25 | |
6f6c7006 SW |
26 | static void send_queued(struct ceph_osd_client *osdc); |
27 | static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd); | |
a40c4f10 YS |
28 | static void __register_request(struct ceph_osd_client *osdc, |
29 | struct ceph_osd_request *req); | |
30 | static void __unregister_linger_request(struct ceph_osd_client *osdc, | |
31 | struct ceph_osd_request *req); | |
56e925b6 SW |
32 | static void __send_request(struct ceph_osd_client *osdc, |
33 | struct ceph_osd_request *req); | |
f24e9980 | 34 | |
68b4476b YS |
35 | static int op_needs_trail(int op) |
36 | { | |
37 | switch (op) { | |
38 | case CEPH_OSD_OP_GETXATTR: | |
39 | case CEPH_OSD_OP_SETXATTR: | |
40 | case CEPH_OSD_OP_CMPXATTR: | |
41 | case CEPH_OSD_OP_CALL: | |
a40c4f10 | 42 | case CEPH_OSD_OP_NOTIFY: |
68b4476b YS |
43 | return 1; |
44 | default: | |
45 | return 0; | |
46 | } | |
47 | } | |
48 | ||
49 | static int op_has_extent(int op) | |
50 | { | |
51 | return (op == CEPH_OSD_OP_READ || | |
52 | op == CEPH_OSD_OP_WRITE); | |
53 | } | |
54 | ||
d63b77f4 | 55 | int ceph_calc_raw_layout(struct ceph_osd_client *osdc, |
3499e8a5 YS |
56 | struct ceph_file_layout *layout, |
57 | u64 snapid, | |
68b4476b YS |
58 | u64 off, u64 *plen, u64 *bno, |
59 | struct ceph_osd_request *req, | |
60 | struct ceph_osd_req_op *op) | |
3499e8a5 YS |
61 | { |
62 | struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base; | |
68b4476b | 63 | u64 orig_len = *plen; |
3499e8a5 | 64 | u64 objoff, objlen; /* extent in object */ |
d63b77f4 | 65 | int r; |
3499e8a5 YS |
66 | |
67 | reqhead->snapid = cpu_to_le64(snapid); | |
68 | ||
69 | /* object extent? */ | |
d63b77f4 SW |
70 | r = ceph_calc_file_object_mapping(layout, off, plen, bno, |
71 | &objoff, &objlen); | |
72 | if (r < 0) | |
73 | return r; | |
68b4476b | 74 | if (*plen < orig_len) |
3499e8a5 | 75 | dout(" skipping last %llu, final file extent %llu~%llu\n", |
68b4476b | 76 | orig_len - *plen, off, *plen); |
3499e8a5 | 77 | |
68b4476b | 78 | if (op_has_extent(op->op)) { |
a41bad1a | 79 | u32 osize = le32_to_cpu(layout->fl_object_size); |
68b4476b YS |
80 | op->extent.offset = objoff; |
81 | op->extent.length = objlen; | |
a41bad1a YZ |
82 | if (op->extent.truncate_size <= off - objoff) { |
83 | op->extent.truncate_size = 0; | |
84 | } else { | |
85 | op->extent.truncate_size -= off - objoff; | |
86 | if (op->extent.truncate_size > osize) | |
87 | op->extent.truncate_size = osize; | |
88 | } | |
68b4476b YS |
89 | } |
90 | req->r_num_pages = calc_pages_for(off, *plen); | |
b7495fc2 | 91 | req->r_page_alignment = off & ~PAGE_MASK; |
3d14c5d2 YS |
92 | if (op->op == CEPH_OSD_OP_WRITE) |
93 | op->payload_len = *plen; | |
3499e8a5 YS |
94 | |
95 | dout("calc_layout bno=%llx %llu~%llu (%d pages)\n", | |
96 | *bno, objoff, objlen, req->r_num_pages); | |
d63b77f4 | 97 | return 0; |
3499e8a5 | 98 | } |
3d14c5d2 | 99 | EXPORT_SYMBOL(ceph_calc_raw_layout); |
3499e8a5 | 100 | |
f24e9980 SW |
101 | /* |
102 | * Implement client access to distributed object storage cluster. | |
103 | * | |
104 | * All data objects are stored within a cluster/cloud of OSDs, or | |
105 | * "object storage devices." (Note that Ceph OSDs have _nothing_ to | |
106 | * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply | |
107 | * remote daemons serving up and coordinating consistent and safe | |
108 | * access to storage. | |
109 | * | |
110 | * Cluster membership and the mapping of data objects onto storage devices | |
111 | * are described by the osd map. | |
112 | * | |
113 | * We keep track of pending OSD requests (read, write), resubmit | |
114 | * requests to different OSDs when the cluster topology/data layout | |
115 | * change, or retry the affected requests when the communications | |
116 | * channel with an OSD is reset. | |
117 | */ | |
118 | ||
119 | /* | |
120 | * calculate the mapping of a file extent onto an object, and fill out the | |
121 | * request accordingly. shorten extent as necessary if it crosses an | |
122 | * object boundary. | |
123 | * | |
124 | * fill osd op in request message. | |
125 | */ | |
d63b77f4 SW |
126 | static int calc_layout(struct ceph_osd_client *osdc, |
127 | struct ceph_vino vino, | |
128 | struct ceph_file_layout *layout, | |
129 | u64 off, u64 *plen, | |
130 | struct ceph_osd_request *req, | |
131 | struct ceph_osd_req_op *op) | |
f24e9980 | 132 | { |
f24e9980 | 133 | u64 bno; |
d63b77f4 | 134 | int r; |
f24e9980 | 135 | |
d63b77f4 SW |
136 | r = ceph_calc_raw_layout(osdc, layout, vino.snap, off, |
137 | plen, &bno, req, op); | |
138 | if (r < 0) | |
139 | return r; | |
f24e9980 | 140 | |
2dab036b | 141 | snprintf(req->r_oid, sizeof(req->r_oid), "%llx.%08llx", vino.ino, bno); |
f24e9980 | 142 | req->r_oid_len = strlen(req->r_oid); |
d63b77f4 SW |
143 | |
144 | return r; | |
f24e9980 SW |
145 | } |
146 | ||
f24e9980 SW |
147 | /* |
148 | * requests | |
149 | */ | |
415e49a9 | 150 | void ceph_osdc_release_request(struct kref *kref) |
f24e9980 | 151 | { |
415e49a9 SW |
152 | struct ceph_osd_request *req = container_of(kref, |
153 | struct ceph_osd_request, | |
154 | r_kref); | |
155 | ||
156 | if (req->r_request) | |
157 | ceph_msg_put(req->r_request); | |
0d59ab81 | 158 | if (req->r_con_filling_msg) { |
8921d114 | 159 | dout("%s revoking pages %p from con %p\n", __func__, |
0d59ab81 | 160 | req->r_pages, req->r_con_filling_msg); |
8921d114 | 161 | ceph_msg_revoke_incoming(req->r_reply); |
0d47766f | 162 | req->r_con_filling_msg->ops->put(req->r_con_filling_msg); |
350b1c32 | 163 | } |
ab8cb34a AE |
164 | if (req->r_reply) |
165 | ceph_msg_put(req->r_reply); | |
415e49a9 SW |
166 | if (req->r_own_pages) |
167 | ceph_release_page_vector(req->r_pages, | |
168 | req->r_num_pages); | |
68b4476b YS |
169 | #ifdef CONFIG_BLOCK |
170 | if (req->r_bio) | |
171 | bio_put(req->r_bio); | |
172 | #endif | |
415e49a9 | 173 | ceph_put_snap_context(req->r_snapc); |
68b4476b YS |
174 | if (req->r_trail) { |
175 | ceph_pagelist_release(req->r_trail); | |
176 | kfree(req->r_trail); | |
177 | } | |
415e49a9 SW |
178 | if (req->r_mempool) |
179 | mempool_free(req, req->r_osdc->req_mempool); | |
180 | else | |
181 | kfree(req); | |
f24e9980 | 182 | } |
3d14c5d2 | 183 | EXPORT_SYMBOL(ceph_osdc_release_request); |
68b4476b YS |
184 | |
185 | static int get_num_ops(struct ceph_osd_req_op *ops, int *needs_trail) | |
186 | { | |
187 | int i = 0; | |
188 | ||
189 | if (needs_trail) | |
190 | *needs_trail = 0; | |
191 | while (ops[i].op) { | |
192 | if (needs_trail && op_needs_trail(ops[i].op)) | |
193 | *needs_trail = 1; | |
194 | i++; | |
195 | } | |
196 | ||
197 | return i; | |
198 | } | |
199 | ||
3499e8a5 YS |
200 | struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, |
201 | int flags, | |
f24e9980 | 202 | struct ceph_snap_context *snapc, |
68b4476b | 203 | struct ceph_osd_req_op *ops, |
3499e8a5 YS |
204 | bool use_mempool, |
205 | gfp_t gfp_flags, | |
68b4476b YS |
206 | struct page **pages, |
207 | struct bio *bio) | |
f24e9980 SW |
208 | { |
209 | struct ceph_osd_request *req; | |
210 | struct ceph_msg *msg; | |
68b4476b YS |
211 | int needs_trail; |
212 | int num_op = get_num_ops(ops, &needs_trail); | |
213 | size_t msg_size = sizeof(struct ceph_osd_request_head); | |
3499e8a5 | 214 | |
68b4476b | 215 | msg_size += num_op*sizeof(struct ceph_osd_op); |
f24e9980 SW |
216 | |
217 | if (use_mempool) { | |
3499e8a5 | 218 | req = mempool_alloc(osdc->req_mempool, gfp_flags); |
f24e9980 SW |
219 | memset(req, 0, sizeof(*req)); |
220 | } else { | |
3499e8a5 | 221 | req = kzalloc(sizeof(*req), gfp_flags); |
f24e9980 SW |
222 | } |
223 | if (req == NULL) | |
a79832f2 | 224 | return NULL; |
f24e9980 | 225 | |
f24e9980 SW |
226 | req->r_osdc = osdc; |
227 | req->r_mempool = use_mempool; | |
68b4476b | 228 | |
415e49a9 | 229 | kref_init(&req->r_kref); |
f24e9980 SW |
230 | init_completion(&req->r_completion); |
231 | init_completion(&req->r_safe_completion); | |
a978fa20 | 232 | RB_CLEAR_NODE(&req->r_node); |
f24e9980 | 233 | INIT_LIST_HEAD(&req->r_unsafe_item); |
a40c4f10 YS |
234 | INIT_LIST_HEAD(&req->r_linger_item); |
235 | INIT_LIST_HEAD(&req->r_linger_osd); | |
935b639a | 236 | INIT_LIST_HEAD(&req->r_req_lru_item); |
cd43045c SW |
237 | INIT_LIST_HEAD(&req->r_osd_item); |
238 | ||
f24e9980 SW |
239 | req->r_flags = flags; |
240 | ||
241 | WARN_ON((flags & (CEPH_OSD_FLAG_READ|CEPH_OSD_FLAG_WRITE)) == 0); | |
242 | ||
c16e7869 SW |
243 | /* create reply message */ |
244 | if (use_mempool) | |
245 | msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); | |
246 | else | |
247 | msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, | |
b61c2763 | 248 | OSD_OPREPLY_FRONT_LEN, gfp_flags, true); |
a79832f2 | 249 | if (!msg) { |
c16e7869 | 250 | ceph_osdc_put_request(req); |
a79832f2 | 251 | return NULL; |
c16e7869 SW |
252 | } |
253 | req->r_reply = msg; | |
254 | ||
68b4476b YS |
255 | /* allocate space for the trailing data */ |
256 | if (needs_trail) { | |
257 | req->r_trail = kmalloc(sizeof(struct ceph_pagelist), gfp_flags); | |
258 | if (!req->r_trail) { | |
259 | ceph_osdc_put_request(req); | |
260 | return NULL; | |
261 | } | |
262 | ceph_pagelist_init(req->r_trail); | |
263 | } | |
d50b409f | 264 | |
c16e7869 | 265 | /* create request message; allow space for oid */ |
224736d9 | 266 | msg_size += MAX_OBJ_NAME_SIZE; |
f24e9980 SW |
267 | if (snapc) |
268 | msg_size += sizeof(u64) * snapc->num_snaps; | |
269 | if (use_mempool) | |
8f3bc053 | 270 | msg = ceph_msgpool_get(&osdc->msgpool_op, 0); |
f24e9980 | 271 | else |
b61c2763 | 272 | msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true); |
a79832f2 | 273 | if (!msg) { |
f24e9980 | 274 | ceph_osdc_put_request(req); |
a79832f2 | 275 | return NULL; |
f24e9980 | 276 | } |
68b4476b | 277 | |
f24e9980 | 278 | memset(msg->front.iov_base, 0, msg->front.iov_len); |
3499e8a5 YS |
279 | |
280 | req->r_request = msg; | |
281 | req->r_pages = pages; | |
68b4476b YS |
282 | #ifdef CONFIG_BLOCK |
283 | if (bio) { | |
284 | req->r_bio = bio; | |
285 | bio_get(req->r_bio); | |
286 | } | |
287 | #endif | |
3499e8a5 YS |
288 | |
289 | return req; | |
290 | } | |
3d14c5d2 | 291 | EXPORT_SYMBOL(ceph_osdc_alloc_request); |
3499e8a5 | 292 | |
68b4476b YS |
293 | static void osd_req_encode_op(struct ceph_osd_request *req, |
294 | struct ceph_osd_op *dst, | |
295 | struct ceph_osd_req_op *src) | |
296 | { | |
297 | dst->op = cpu_to_le16(src->op); | |
298 | ||
065a68f9 | 299 | switch (src->op) { |
68b4476b YS |
300 | case CEPH_OSD_OP_READ: |
301 | case CEPH_OSD_OP_WRITE: | |
302 | dst->extent.offset = | |
303 | cpu_to_le64(src->extent.offset); | |
304 | dst->extent.length = | |
305 | cpu_to_le64(src->extent.length); | |
306 | dst->extent.truncate_size = | |
307 | cpu_to_le64(src->extent.truncate_size); | |
308 | dst->extent.truncate_seq = | |
309 | cpu_to_le32(src->extent.truncate_seq); | |
310 | break; | |
311 | ||
312 | case CEPH_OSD_OP_GETXATTR: | |
313 | case CEPH_OSD_OP_SETXATTR: | |
314 | case CEPH_OSD_OP_CMPXATTR: | |
315 | BUG_ON(!req->r_trail); | |
316 | ||
317 | dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); | |
318 | dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); | |
319 | dst->xattr.cmp_op = src->xattr.cmp_op; | |
320 | dst->xattr.cmp_mode = src->xattr.cmp_mode; | |
321 | ceph_pagelist_append(req->r_trail, src->xattr.name, | |
322 | src->xattr.name_len); | |
323 | ceph_pagelist_append(req->r_trail, src->xattr.val, | |
324 | src->xattr.value_len); | |
325 | break; | |
ae1533b6 YS |
326 | case CEPH_OSD_OP_CALL: |
327 | BUG_ON(!req->r_trail); | |
328 | ||
329 | dst->cls.class_len = src->cls.class_len; | |
330 | dst->cls.method_len = src->cls.method_len; | |
331 | dst->cls.indata_len = cpu_to_le32(src->cls.indata_len); | |
332 | ||
333 | ceph_pagelist_append(req->r_trail, src->cls.class_name, | |
334 | src->cls.class_len); | |
335 | ceph_pagelist_append(req->r_trail, src->cls.method_name, | |
336 | src->cls.method_len); | |
337 | ceph_pagelist_append(req->r_trail, src->cls.indata, | |
338 | src->cls.indata_len); | |
339 | break; | |
340 | case CEPH_OSD_OP_ROLLBACK: | |
341 | dst->snap.snapid = cpu_to_le64(src->snap.snapid); | |
342 | break; | |
68b4476b YS |
343 | case CEPH_OSD_OP_STARTSYNC: |
344 | break; | |
a40c4f10 YS |
345 | case CEPH_OSD_OP_NOTIFY: |
346 | { | |
347 | __le32 prot_ver = cpu_to_le32(src->watch.prot_ver); | |
348 | __le32 timeout = cpu_to_le32(src->watch.timeout); | |
349 | ||
350 | BUG_ON(!req->r_trail); | |
351 | ||
352 | ceph_pagelist_append(req->r_trail, | |
353 | &prot_ver, sizeof(prot_ver)); | |
354 | ceph_pagelist_append(req->r_trail, | |
355 | &timeout, sizeof(timeout)); | |
356 | } | |
357 | case CEPH_OSD_OP_NOTIFY_ACK: | |
358 | case CEPH_OSD_OP_WATCH: | |
359 | dst->watch.cookie = cpu_to_le64(src->watch.cookie); | |
360 | dst->watch.ver = cpu_to_le64(src->watch.ver); | |
361 | dst->watch.flag = src->watch.flag; | |
362 | break; | |
68b4476b YS |
363 | default: |
364 | pr_err("unrecognized osd opcode %d\n", dst->op); | |
365 | WARN_ON(1); | |
366 | break; | |
367 | } | |
368 | dst->payload_len = cpu_to_le32(src->payload_len); | |
369 | } | |
370 | ||
3499e8a5 YS |
371 | /* |
372 | * build new request AND message | |
373 | * | |
374 | */ | |
375 | void ceph_osdc_build_request(struct ceph_osd_request *req, | |
68b4476b YS |
376 | u64 off, u64 *plen, |
377 | struct ceph_osd_req_op *src_ops, | |
378 | struct ceph_snap_context *snapc, | |
af77f26c | 379 | struct timespec *mtime) |
3499e8a5 YS |
380 | { |
381 | struct ceph_msg *msg = req->r_request; | |
382 | struct ceph_osd_request_head *head; | |
68b4476b | 383 | struct ceph_osd_req_op *src_op; |
3499e8a5 YS |
384 | struct ceph_osd_op *op; |
385 | void *p; | |
68b4476b | 386 | int num_op = get_num_ops(src_ops, NULL); |
3499e8a5 | 387 | size_t msg_size = sizeof(*head) + num_op*sizeof(*op); |
3499e8a5 | 388 | int flags = req->r_flags; |
68b4476b YS |
389 | u64 data_len = 0; |
390 | int i; | |
3499e8a5 | 391 | |
f24e9980 SW |
392 | head = msg->front.iov_base; |
393 | op = (void *)(head + 1); | |
394 | p = (void *)(op + num_op); | |
395 | ||
f24e9980 SW |
396 | req->r_snapc = ceph_get_snap_context(snapc); |
397 | ||
398 | head->client_inc = cpu_to_le32(1); /* always, for now. */ | |
399 | head->flags = cpu_to_le32(flags); | |
400 | if (flags & CEPH_OSD_FLAG_WRITE) | |
401 | ceph_encode_timespec(&head->mtime, mtime); | |
402 | head->num_ops = cpu_to_le16(num_op); | |
f24e9980 | 403 | |
f24e9980 SW |
404 | |
405 | /* fill in oid */ | |
af77f26c AE |
406 | head->object_len = cpu_to_le32(req->r_oid_len); |
407 | memcpy(p, req->r_oid, req->r_oid_len); | |
408 | p += req->r_oid_len; | |
f24e9980 | 409 | |
68b4476b YS |
410 | src_op = src_ops; |
411 | while (src_op->op) { | |
412 | osd_req_encode_op(req, op, src_op); | |
413 | src_op++; | |
f24e9980 | 414 | op++; |
f24e9980 | 415 | } |
68b4476b YS |
416 | |
417 | if (req->r_trail) | |
418 | data_len += req->r_trail->length; | |
419 | ||
f24e9980 SW |
420 | if (snapc) { |
421 | head->snap_seq = cpu_to_le64(snapc->seq); | |
422 | head->num_snaps = cpu_to_le32(snapc->num_snaps); | |
423 | for (i = 0; i < snapc->num_snaps; i++) { | |
424 | put_unaligned_le64(snapc->snaps[i], p); | |
425 | p += sizeof(u64); | |
426 | } | |
427 | } | |
428 | ||
68b4476b YS |
429 | if (flags & CEPH_OSD_FLAG_WRITE) { |
430 | req->r_request->hdr.data_off = cpu_to_le16(off); | |
431 | req->r_request->hdr.data_len = cpu_to_le32(*plen + data_len); | |
432 | } else if (data_len) { | |
433 | req->r_request->hdr.data_off = 0; | |
434 | req->r_request->hdr.data_len = cpu_to_le32(data_len); | |
435 | } | |
436 | ||
c5c6b19d SW |
437 | req->r_request->page_alignment = req->r_page_alignment; |
438 | ||
f24e9980 | 439 | BUG_ON(p > msg->front.iov_base + msg->front.iov_len); |
6f863e71 SW |
440 | msg_size = p - msg->front.iov_base; |
441 | msg->front.iov_len = msg_size; | |
442 | msg->hdr.front_len = cpu_to_le32(msg_size); | |
3499e8a5 YS |
443 | return; |
444 | } | |
3d14c5d2 | 445 | EXPORT_SYMBOL(ceph_osdc_build_request); |
3499e8a5 YS |
446 | |
447 | /* | |
448 | * build new request AND message, calculate layout, and adjust file | |
449 | * extent as needed. | |
450 | * | |
451 | * if the file was recently truncated, we include information about its | |
452 | * old and new size so that the object can be updated appropriately. (we | |
453 | * avoid synchronously deleting truncated objects because it's slow.) | |
454 | * | |
455 | * if @do_sync, include a 'startsync' command so that the osd will flush | |
456 | * data quickly. | |
457 | */ | |
458 | struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, | |
459 | struct ceph_file_layout *layout, | |
460 | struct ceph_vino vino, | |
461 | u64 off, u64 *plen, | |
462 | int opcode, int flags, | |
463 | struct ceph_snap_context *snapc, | |
464 | int do_sync, | |
465 | u32 truncate_seq, | |
466 | u64 truncate_size, | |
467 | struct timespec *mtime, | |
b7495fc2 SW |
468 | bool use_mempool, int num_reply, |
469 | int page_align) | |
3499e8a5 | 470 | { |
68b4476b YS |
471 | struct ceph_osd_req_op ops[3]; |
472 | struct ceph_osd_request *req; | |
6816282d | 473 | int r; |
68b4476b YS |
474 | |
475 | ops[0].op = opcode; | |
476 | ops[0].extent.truncate_seq = truncate_seq; | |
477 | ops[0].extent.truncate_size = truncate_size; | |
478 | ops[0].payload_len = 0; | |
479 | ||
480 | if (do_sync) { | |
481 | ops[1].op = CEPH_OSD_OP_STARTSYNC; | |
482 | ops[1].payload_len = 0; | |
483 | ops[2].op = 0; | |
484 | } else | |
485 | ops[1].op = 0; | |
486 | ||
487 | req = ceph_osdc_alloc_request(osdc, flags, | |
488 | snapc, ops, | |
3499e8a5 | 489 | use_mempool, |
68b4476b | 490 | GFP_NOFS, NULL, NULL); |
4ad12621 | 491 | if (!req) |
6816282d | 492 | return ERR_PTR(-ENOMEM); |
3499e8a5 YS |
493 | |
494 | /* calculate max write size */ | |
6816282d SW |
495 | r = calc_layout(osdc, vino, layout, off, plen, req, ops); |
496 | if (r < 0) | |
497 | return ERR_PTR(r); | |
3499e8a5 YS |
498 | req->r_file_layout = *layout; /* keep a copy */ |
499 | ||
9bb0ce2b SW |
500 | /* in case it differs from natural (file) alignment that |
501 | calc_layout filled in for us */ | |
502 | req->r_num_pages = calc_pages_for(page_align, *plen); | |
b7495fc2 SW |
503 | req->r_page_alignment = page_align; |
504 | ||
68b4476b YS |
505 | ceph_osdc_build_request(req, off, plen, ops, |
506 | snapc, | |
af77f26c | 507 | mtime); |
3499e8a5 | 508 | |
f24e9980 SW |
509 | return req; |
510 | } | |
3d14c5d2 | 511 | EXPORT_SYMBOL(ceph_osdc_new_request); |
f24e9980 SW |
512 | |
513 | /* | |
514 | * We keep osd requests in an rbtree, sorted by ->r_tid. | |
515 | */ | |
516 | static void __insert_request(struct ceph_osd_client *osdc, | |
517 | struct ceph_osd_request *new) | |
518 | { | |
519 | struct rb_node **p = &osdc->requests.rb_node; | |
520 | struct rb_node *parent = NULL; | |
521 | struct ceph_osd_request *req = NULL; | |
522 | ||
523 | while (*p) { | |
524 | parent = *p; | |
525 | req = rb_entry(parent, struct ceph_osd_request, r_node); | |
526 | if (new->r_tid < req->r_tid) | |
527 | p = &(*p)->rb_left; | |
528 | else if (new->r_tid > req->r_tid) | |
529 | p = &(*p)->rb_right; | |
530 | else | |
531 | BUG(); | |
532 | } | |
533 | ||
534 | rb_link_node(&new->r_node, parent, p); | |
535 | rb_insert_color(&new->r_node, &osdc->requests); | |
536 | } | |
537 | ||
538 | static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc, | |
539 | u64 tid) | |
540 | { | |
541 | struct ceph_osd_request *req; | |
542 | struct rb_node *n = osdc->requests.rb_node; | |
543 | ||
544 | while (n) { | |
545 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
546 | if (tid < req->r_tid) | |
547 | n = n->rb_left; | |
548 | else if (tid > req->r_tid) | |
549 | n = n->rb_right; | |
550 | else | |
551 | return req; | |
552 | } | |
553 | return NULL; | |
554 | } | |
555 | ||
556 | static struct ceph_osd_request * | |
557 | __lookup_request_ge(struct ceph_osd_client *osdc, | |
558 | u64 tid) | |
559 | { | |
560 | struct ceph_osd_request *req; | |
561 | struct rb_node *n = osdc->requests.rb_node; | |
562 | ||
563 | while (n) { | |
564 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
565 | if (tid < req->r_tid) { | |
566 | if (!n->rb_left) | |
567 | return req; | |
568 | n = n->rb_left; | |
569 | } else if (tid > req->r_tid) { | |
570 | n = n->rb_right; | |
571 | } else { | |
572 | return req; | |
573 | } | |
574 | } | |
575 | return NULL; | |
576 | } | |
577 | ||
6f6c7006 SW |
578 | /* |
579 | * Resubmit requests pending on the given osd. | |
580 | */ | |
581 | static void __kick_osd_requests(struct ceph_osd_client *osdc, | |
582 | struct ceph_osd *osd) | |
583 | { | |
a40c4f10 | 584 | struct ceph_osd_request *req, *nreq; |
6f6c7006 SW |
585 | int err; |
586 | ||
587 | dout("__kick_osd_requests osd%d\n", osd->o_osd); | |
588 | err = __reset_osd(osdc, osd); | |
685a7555 | 589 | if (err) |
6f6c7006 SW |
590 | return; |
591 | ||
592 | list_for_each_entry(req, &osd->o_requests, r_osd_item) { | |
593 | list_move(&req->r_req_lru_item, &osdc->req_unsent); | |
594 | dout("requeued %p tid %llu osd%d\n", req, req->r_tid, | |
595 | osd->o_osd); | |
a40c4f10 YS |
596 | if (!req->r_linger) |
597 | req->r_flags |= CEPH_OSD_FLAG_RETRY; | |
598 | } | |
599 | ||
600 | list_for_each_entry_safe(req, nreq, &osd->o_linger_requests, | |
601 | r_linger_osd) { | |
77f38e0e SW |
602 | /* |
603 | * reregister request prior to unregistering linger so | |
604 | * that r_osd is preserved. | |
605 | */ | |
606 | BUG_ON(!list_empty(&req->r_req_lru_item)); | |
a40c4f10 | 607 | __register_request(osdc, req); |
77f38e0e SW |
608 | list_add(&req->r_req_lru_item, &osdc->req_unsent); |
609 | list_add(&req->r_osd_item, &req->r_osd->o_requests); | |
610 | __unregister_linger_request(osdc, req); | |
a40c4f10 YS |
611 | dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid, |
612 | osd->o_osd); | |
6f6c7006 SW |
613 | } |
614 | } | |
615 | ||
f24e9980 | 616 | /* |
81b024e7 | 617 | * If the osd connection drops, we need to resubmit all requests. |
f24e9980 SW |
618 | */ |
619 | static void osd_reset(struct ceph_connection *con) | |
620 | { | |
621 | struct ceph_osd *osd = con->private; | |
622 | struct ceph_osd_client *osdc; | |
623 | ||
624 | if (!osd) | |
625 | return; | |
626 | dout("osd_reset osd%d\n", osd->o_osd); | |
627 | osdc = osd->o_osdc; | |
f24e9980 | 628 | down_read(&osdc->map_sem); |
83aff95e SW |
629 | mutex_lock(&osdc->request_mutex); |
630 | __kick_osd_requests(osdc, osd); | |
631 | mutex_unlock(&osdc->request_mutex); | |
6f6c7006 | 632 | send_queued(osdc); |
f24e9980 SW |
633 | up_read(&osdc->map_sem); |
634 | } | |
635 | ||
636 | /* | |
637 | * Track open sessions with osds. | |
638 | */ | |
e10006f8 | 639 | static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum) |
f24e9980 SW |
640 | { |
641 | struct ceph_osd *osd; | |
642 | ||
643 | osd = kzalloc(sizeof(*osd), GFP_NOFS); | |
644 | if (!osd) | |
645 | return NULL; | |
646 | ||
647 | atomic_set(&osd->o_ref, 1); | |
648 | osd->o_osdc = osdc; | |
e10006f8 | 649 | osd->o_osd = onum; |
f407731d | 650 | RB_CLEAR_NODE(&osd->o_node); |
f24e9980 | 651 | INIT_LIST_HEAD(&osd->o_requests); |
a40c4f10 | 652 | INIT_LIST_HEAD(&osd->o_linger_requests); |
f5a2041b | 653 | INIT_LIST_HEAD(&osd->o_osd_lru); |
f24e9980 SW |
654 | osd->o_incarnation = 1; |
655 | ||
b7a9e5dd | 656 | ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); |
4e7a5dcd | 657 | |
422d2cb8 | 658 | INIT_LIST_HEAD(&osd->o_keepalive_item); |
f24e9980 SW |
659 | return osd; |
660 | } | |
661 | ||
662 | static struct ceph_osd *get_osd(struct ceph_osd *osd) | |
663 | { | |
664 | if (atomic_inc_not_zero(&osd->o_ref)) { | |
665 | dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1, | |
666 | atomic_read(&osd->o_ref)); | |
667 | return osd; | |
668 | } else { | |
669 | dout("get_osd %p FAIL\n", osd); | |
670 | return NULL; | |
671 | } | |
672 | } | |
673 | ||
674 | static void put_osd(struct ceph_osd *osd) | |
675 | { | |
676 | dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref), | |
677 | atomic_read(&osd->o_ref) - 1); | |
a255651d | 678 | if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) { |
79494d1b SW |
679 | struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth; |
680 | ||
a255651d | 681 | if (ac->ops && ac->ops->destroy_authorizer) |
6c4a1915 | 682 | ac->ops->destroy_authorizer(ac, osd->o_auth.authorizer); |
f24e9980 | 683 | kfree(osd); |
79494d1b | 684 | } |
f24e9980 SW |
685 | } |
686 | ||
687 | /* | |
688 | * remove an osd from our map | |
689 | */ | |
f5a2041b | 690 | static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) |
f24e9980 | 691 | { |
f5a2041b | 692 | dout("__remove_osd %p\n", osd); |
f24e9980 SW |
693 | BUG_ON(!list_empty(&osd->o_requests)); |
694 | rb_erase(&osd->o_node, &osdc->osds); | |
f5a2041b | 695 | list_del_init(&osd->o_osd_lru); |
f24e9980 SW |
696 | ceph_con_close(&osd->o_con); |
697 | put_osd(osd); | |
698 | } | |
699 | ||
aca420bc SW |
700 | static void remove_all_osds(struct ceph_osd_client *osdc) |
701 | { | |
048a9d2d | 702 | dout("%s %p\n", __func__, osdc); |
aca420bc SW |
703 | mutex_lock(&osdc->request_mutex); |
704 | while (!RB_EMPTY_ROOT(&osdc->osds)) { | |
705 | struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), | |
706 | struct ceph_osd, o_node); | |
707 | __remove_osd(osdc, osd); | |
708 | } | |
709 | mutex_unlock(&osdc->request_mutex); | |
710 | } | |
711 | ||
f5a2041b YS |
712 | static void __move_osd_to_lru(struct ceph_osd_client *osdc, |
713 | struct ceph_osd *osd) | |
714 | { | |
715 | dout("__move_osd_to_lru %p\n", osd); | |
716 | BUG_ON(!list_empty(&osd->o_osd_lru)); | |
717 | list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); | |
3d14c5d2 | 718 | osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ; |
f5a2041b YS |
719 | } |
720 | ||
721 | static void __remove_osd_from_lru(struct ceph_osd *osd) | |
722 | { | |
723 | dout("__remove_osd_from_lru %p\n", osd); | |
724 | if (!list_empty(&osd->o_osd_lru)) | |
725 | list_del_init(&osd->o_osd_lru); | |
726 | } | |
727 | ||
aca420bc | 728 | static void remove_old_osds(struct ceph_osd_client *osdc) |
f5a2041b YS |
729 | { |
730 | struct ceph_osd *osd, *nosd; | |
731 | ||
732 | dout("__remove_old_osds %p\n", osdc); | |
733 | mutex_lock(&osdc->request_mutex); | |
734 | list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { | |
aca420bc | 735 | if (time_before(jiffies, osd->lru_ttl)) |
f5a2041b YS |
736 | break; |
737 | __remove_osd(osdc, osd); | |
738 | } | |
739 | mutex_unlock(&osdc->request_mutex); | |
740 | } | |
741 | ||
f24e9980 SW |
742 | /* |
743 | * reset osd connect | |
744 | */ | |
f5a2041b | 745 | static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) |
f24e9980 | 746 | { |
c3acb181 | 747 | struct ceph_entity_addr *peer_addr; |
f24e9980 | 748 | |
f5a2041b | 749 | dout("__reset_osd %p osd%d\n", osd, osd->o_osd); |
a40c4f10 YS |
750 | if (list_empty(&osd->o_requests) && |
751 | list_empty(&osd->o_linger_requests)) { | |
f5a2041b | 752 | __remove_osd(osdc, osd); |
c3acb181 AE |
753 | |
754 | return -ENODEV; | |
755 | } | |
756 | ||
757 | peer_addr = &osdc->osdmap->osd_addr[osd->o_osd]; | |
758 | if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) && | |
759 | !ceph_con_opened(&osd->o_con)) { | |
760 | struct ceph_osd_request *req; | |
761 | ||
87b315a5 SW |
762 | dout(" osd addr hasn't changed and connection never opened," |
763 | " letting msgr retry"); | |
764 | /* touch each r_stamp for handle_timeout()'s benfit */ | |
765 | list_for_each_entry(req, &osd->o_requests, r_osd_item) | |
766 | req->r_stamp = jiffies; | |
c3acb181 AE |
767 | |
768 | return -EAGAIN; | |
f24e9980 | 769 | } |
c3acb181 AE |
770 | |
771 | ceph_con_close(&osd->o_con); | |
772 | ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr); | |
773 | osd->o_incarnation++; | |
774 | ||
775 | return 0; | |
f24e9980 SW |
776 | } |
777 | ||
778 | static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new) | |
779 | { | |
780 | struct rb_node **p = &osdc->osds.rb_node; | |
781 | struct rb_node *parent = NULL; | |
782 | struct ceph_osd *osd = NULL; | |
783 | ||
aca420bc | 784 | dout("__insert_osd %p osd%d\n", new, new->o_osd); |
f24e9980 SW |
785 | while (*p) { |
786 | parent = *p; | |
787 | osd = rb_entry(parent, struct ceph_osd, o_node); | |
788 | if (new->o_osd < osd->o_osd) | |
789 | p = &(*p)->rb_left; | |
790 | else if (new->o_osd > osd->o_osd) | |
791 | p = &(*p)->rb_right; | |
792 | else | |
793 | BUG(); | |
794 | } | |
795 | ||
796 | rb_link_node(&new->o_node, parent, p); | |
797 | rb_insert_color(&new->o_node, &osdc->osds); | |
798 | } | |
799 | ||
800 | static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o) | |
801 | { | |
802 | struct ceph_osd *osd; | |
803 | struct rb_node *n = osdc->osds.rb_node; | |
804 | ||
805 | while (n) { | |
806 | osd = rb_entry(n, struct ceph_osd, o_node); | |
807 | if (o < osd->o_osd) | |
808 | n = n->rb_left; | |
809 | else if (o > osd->o_osd) | |
810 | n = n->rb_right; | |
811 | else | |
812 | return osd; | |
813 | } | |
814 | return NULL; | |
815 | } | |
816 | ||
422d2cb8 YS |
817 | static void __schedule_osd_timeout(struct ceph_osd_client *osdc) |
818 | { | |
819 | schedule_delayed_work(&osdc->timeout_work, | |
3d14c5d2 | 820 | osdc->client->options->osd_keepalive_timeout * HZ); |
422d2cb8 YS |
821 | } |
822 | ||
823 | static void __cancel_osd_timeout(struct ceph_osd_client *osdc) | |
824 | { | |
825 | cancel_delayed_work(&osdc->timeout_work); | |
826 | } | |
f24e9980 SW |
827 | |
828 | /* | |
829 | * Register request, assign tid. If this is the first request, set up | |
830 | * the timeout event. | |
831 | */ | |
a40c4f10 YS |
832 | static void __register_request(struct ceph_osd_client *osdc, |
833 | struct ceph_osd_request *req) | |
f24e9980 | 834 | { |
f24e9980 | 835 | req->r_tid = ++osdc->last_tid; |
6df058c0 | 836 | req->r_request->hdr.tid = cpu_to_le64(req->r_tid); |
77f38e0e | 837 | dout("__register_request %p tid %lld\n", req, req->r_tid); |
f24e9980 SW |
838 | __insert_request(osdc, req); |
839 | ceph_osdc_get_request(req); | |
840 | osdc->num_requests++; | |
f24e9980 | 841 | if (osdc->num_requests == 1) { |
422d2cb8 YS |
842 | dout(" first request, scheduling timeout\n"); |
843 | __schedule_osd_timeout(osdc); | |
f24e9980 | 844 | } |
a40c4f10 YS |
845 | } |
846 | ||
847 | static void register_request(struct ceph_osd_client *osdc, | |
848 | struct ceph_osd_request *req) | |
849 | { | |
850 | mutex_lock(&osdc->request_mutex); | |
851 | __register_request(osdc, req); | |
f24e9980 SW |
852 | mutex_unlock(&osdc->request_mutex); |
853 | } | |
854 | ||
855 | /* | |
856 | * called under osdc->request_mutex | |
857 | */ | |
858 | static void __unregister_request(struct ceph_osd_client *osdc, | |
859 | struct ceph_osd_request *req) | |
860 | { | |
35f9f8a0 SW |
861 | if (RB_EMPTY_NODE(&req->r_node)) { |
862 | dout("__unregister_request %p tid %lld not registered\n", | |
863 | req, req->r_tid); | |
864 | return; | |
865 | } | |
866 | ||
f24e9980 SW |
867 | dout("__unregister_request %p tid %lld\n", req, req->r_tid); |
868 | rb_erase(&req->r_node, &osdc->requests); | |
869 | osdc->num_requests--; | |
870 | ||
0ba6478d SW |
871 | if (req->r_osd) { |
872 | /* make sure the original request isn't in flight. */ | |
6740a845 | 873 | ceph_msg_revoke(req->r_request); |
0ba6478d SW |
874 | |
875 | list_del_init(&req->r_osd_item); | |
a40c4f10 YS |
876 | if (list_empty(&req->r_osd->o_requests) && |
877 | list_empty(&req->r_osd->o_linger_requests)) { | |
878 | dout("moving osd to %p lru\n", req->r_osd); | |
f5a2041b | 879 | __move_osd_to_lru(osdc, req->r_osd); |
a40c4f10 | 880 | } |
fbdb9190 | 881 | if (list_empty(&req->r_linger_item)) |
a40c4f10 | 882 | req->r_osd = NULL; |
0ba6478d | 883 | } |
f24e9980 | 884 | |
7d5f2481 | 885 | list_del_init(&req->r_req_lru_item); |
f24e9980 SW |
886 | ceph_osdc_put_request(req); |
887 | ||
422d2cb8 YS |
888 | if (osdc->num_requests == 0) { |
889 | dout(" no requests, canceling timeout\n"); | |
890 | __cancel_osd_timeout(osdc); | |
f24e9980 SW |
891 | } |
892 | } | |
893 | ||
894 | /* | |
895 | * Cancel a previously queued request message | |
896 | */ | |
897 | static void __cancel_request(struct ceph_osd_request *req) | |
898 | { | |
6bc18876 | 899 | if (req->r_sent && req->r_osd) { |
6740a845 | 900 | ceph_msg_revoke(req->r_request); |
f24e9980 SW |
901 | req->r_sent = 0; |
902 | } | |
903 | } | |
904 | ||
a40c4f10 YS |
905 | static void __register_linger_request(struct ceph_osd_client *osdc, |
906 | struct ceph_osd_request *req) | |
907 | { | |
908 | dout("__register_linger_request %p\n", req); | |
909 | list_add_tail(&req->r_linger_item, &osdc->req_linger); | |
6194ea89 SW |
910 | if (req->r_osd) |
911 | list_add_tail(&req->r_linger_osd, | |
912 | &req->r_osd->o_linger_requests); | |
a40c4f10 YS |
913 | } |
914 | ||
915 | static void __unregister_linger_request(struct ceph_osd_client *osdc, | |
916 | struct ceph_osd_request *req) | |
917 | { | |
918 | dout("__unregister_linger_request %p\n", req); | |
61c74035 | 919 | list_del_init(&req->r_linger_item); |
a40c4f10 | 920 | if (req->r_osd) { |
a40c4f10 YS |
921 | list_del_init(&req->r_linger_osd); |
922 | ||
923 | if (list_empty(&req->r_osd->o_requests) && | |
924 | list_empty(&req->r_osd->o_linger_requests)) { | |
925 | dout("moving osd to %p lru\n", req->r_osd); | |
926 | __move_osd_to_lru(osdc, req->r_osd); | |
927 | } | |
fbdb9190 SW |
928 | if (list_empty(&req->r_osd_item)) |
929 | req->r_osd = NULL; | |
a40c4f10 YS |
930 | } |
931 | } | |
932 | ||
933 | void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc, | |
934 | struct ceph_osd_request *req) | |
935 | { | |
936 | mutex_lock(&osdc->request_mutex); | |
937 | if (req->r_linger) { | |
938 | __unregister_linger_request(osdc, req); | |
939 | ceph_osdc_put_request(req); | |
940 | } | |
941 | mutex_unlock(&osdc->request_mutex); | |
942 | } | |
943 | EXPORT_SYMBOL(ceph_osdc_unregister_linger_request); | |
944 | ||
945 | void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc, | |
946 | struct ceph_osd_request *req) | |
947 | { | |
948 | if (!req->r_linger) { | |
949 | dout("set_request_linger %p\n", req); | |
950 | req->r_linger = 1; | |
951 | /* | |
952 | * caller is now responsible for calling | |
953 | * unregister_linger_request | |
954 | */ | |
955 | ceph_osdc_get_request(req); | |
956 | } | |
957 | } | |
958 | EXPORT_SYMBOL(ceph_osdc_set_request_linger); | |
959 | ||
f24e9980 SW |
960 | /* |
961 | * Pick an osd (the first 'up' osd in the pg), allocate the osd struct | |
962 | * (as needed), and set the request r_osd appropriately. If there is | |
25985edc | 963 | * no up osd, set r_osd to NULL. Move the request to the appropriate list |
6f6c7006 | 964 | * (unsent, homeless) or leave on in-flight lru. |
f24e9980 SW |
965 | * |
966 | * Return 0 if unchanged, 1 if changed, or negative on error. | |
967 | * | |
968 | * Caller should hold map_sem for read and request_mutex. | |
969 | */ | |
6f6c7006 | 970 | static int __map_request(struct ceph_osd_client *osdc, |
38d6453c | 971 | struct ceph_osd_request *req, int force_resend) |
f24e9980 SW |
972 | { |
973 | struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base; | |
51042122 | 974 | struct ceph_pg pgid; |
d85b7056 SW |
975 | int acting[CEPH_PG_MAX_SIZE]; |
976 | int o = -1, num = 0; | |
f24e9980 | 977 | int err; |
f24e9980 | 978 | |
6f6c7006 | 979 | dout("map_request %p tid %lld\n", req, req->r_tid); |
f24e9980 SW |
980 | err = ceph_calc_object_layout(&reqhead->layout, req->r_oid, |
981 | &req->r_file_layout, osdc->osdmap); | |
6f6c7006 SW |
982 | if (err) { |
983 | list_move(&req->r_req_lru_item, &osdc->req_notarget); | |
f24e9980 | 984 | return err; |
6f6c7006 | 985 | } |
51042122 | 986 | pgid = reqhead->layout.ol_pgid; |
7740a42f SW |
987 | req->r_pgid = pgid; |
988 | ||
d85b7056 SW |
989 | err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting); |
990 | if (err > 0) { | |
991 | o = acting[0]; | |
992 | num = err; | |
993 | } | |
f24e9980 | 994 | |
38d6453c SW |
995 | if ((!force_resend && |
996 | req->r_osd && req->r_osd->o_osd == o && | |
d85b7056 SW |
997 | req->r_sent >= req->r_osd->o_incarnation && |
998 | req->r_num_pg_osds == num && | |
999 | memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) || | |
f24e9980 SW |
1000 | (req->r_osd == NULL && o == -1)) |
1001 | return 0; /* no change */ | |
1002 | ||
6f6c7006 | 1003 | dout("map_request tid %llu pgid %d.%x osd%d (was osd%d)\n", |
51042122 | 1004 | req->r_tid, le32_to_cpu(pgid.pool), le16_to_cpu(pgid.ps), o, |
f24e9980 SW |
1005 | req->r_osd ? req->r_osd->o_osd : -1); |
1006 | ||
d85b7056 SW |
1007 | /* record full pg acting set */ |
1008 | memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num); | |
1009 | req->r_num_pg_osds = num; | |
1010 | ||
f24e9980 SW |
1011 | if (req->r_osd) { |
1012 | __cancel_request(req); | |
1013 | list_del_init(&req->r_osd_item); | |
f24e9980 SW |
1014 | req->r_osd = NULL; |
1015 | } | |
1016 | ||
1017 | req->r_osd = __lookup_osd(osdc, o); | |
1018 | if (!req->r_osd && o >= 0) { | |
c99eb1c7 | 1019 | err = -ENOMEM; |
e10006f8 | 1020 | req->r_osd = create_osd(osdc, o); |
6f6c7006 SW |
1021 | if (!req->r_osd) { |
1022 | list_move(&req->r_req_lru_item, &osdc->req_notarget); | |
c99eb1c7 | 1023 | goto out; |
6f6c7006 | 1024 | } |
f24e9980 | 1025 | |
6f6c7006 | 1026 | dout("map_request osd %p is osd%d\n", req->r_osd, o); |
f24e9980 SW |
1027 | __insert_osd(osdc, req->r_osd); |
1028 | ||
b7a9e5dd SW |
1029 | ceph_con_open(&req->r_osd->o_con, |
1030 | CEPH_ENTITY_TYPE_OSD, o, | |
1031 | &osdc->osdmap->osd_addr[o]); | |
f24e9980 SW |
1032 | } |
1033 | ||
f5a2041b YS |
1034 | if (req->r_osd) { |
1035 | __remove_osd_from_lru(req->r_osd); | |
f24e9980 | 1036 | list_add(&req->r_osd_item, &req->r_osd->o_requests); |
6f6c7006 SW |
1037 | list_move(&req->r_req_lru_item, &osdc->req_unsent); |
1038 | } else { | |
1039 | list_move(&req->r_req_lru_item, &osdc->req_notarget); | |
f5a2041b | 1040 | } |
d85b7056 | 1041 | err = 1; /* osd or pg changed */ |
f24e9980 SW |
1042 | |
1043 | out: | |
f24e9980 SW |
1044 | return err; |
1045 | } | |
1046 | ||
1047 | /* | |
1048 | * caller should hold map_sem (for read) and request_mutex | |
1049 | */ | |
56e925b6 SW |
1050 | static void __send_request(struct ceph_osd_client *osdc, |
1051 | struct ceph_osd_request *req) | |
f24e9980 SW |
1052 | { |
1053 | struct ceph_osd_request_head *reqhead; | |
f24e9980 SW |
1054 | |
1055 | dout("send_request %p tid %llu to osd%d flags %d\n", | |
1056 | req, req->r_tid, req->r_osd->o_osd, req->r_flags); | |
1057 | ||
1058 | reqhead = req->r_request->front.iov_base; | |
1059 | reqhead->osdmap_epoch = cpu_to_le32(osdc->osdmap->epoch); | |
1060 | reqhead->flags |= cpu_to_le32(req->r_flags); /* e.g., RETRY */ | |
1061 | reqhead->reassert_version = req->r_reassert_version; | |
1062 | ||
3dd72fc0 | 1063 | req->r_stamp = jiffies; |
07a27e22 | 1064 | list_move_tail(&req->r_req_lru_item, &osdc->req_lru); |
f24e9980 SW |
1065 | |
1066 | ceph_msg_get(req->r_request); /* send consumes a ref */ | |
1067 | ceph_con_send(&req->r_osd->o_con, req->r_request); | |
1068 | req->r_sent = req->r_osd->o_incarnation; | |
f24e9980 SW |
1069 | } |
1070 | ||
6f6c7006 SW |
1071 | /* |
1072 | * Send any requests in the queue (req_unsent). | |
1073 | */ | |
1074 | static void send_queued(struct ceph_osd_client *osdc) | |
1075 | { | |
1076 | struct ceph_osd_request *req, *tmp; | |
1077 | ||
1078 | dout("send_queued\n"); | |
1079 | mutex_lock(&osdc->request_mutex); | |
1080 | list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item) { | |
1081 | __send_request(osdc, req); | |
1082 | } | |
1083 | mutex_unlock(&osdc->request_mutex); | |
1084 | } | |
1085 | ||
f24e9980 SW |
1086 | /* |
1087 | * Timeout callback, called every N seconds when 1 or more osd | |
1088 | * requests has been active for more than N seconds. When this | |
1089 | * happens, we ping all OSDs with requests who have timed out to | |
1090 | * ensure any communications channel reset is detected. Reset the | |
1091 | * request timeouts another N seconds in the future as we go. | |
1092 | * Reschedule the timeout event another N seconds in future (unless | |
1093 | * there are no open requests). | |
1094 | */ | |
1095 | static void handle_timeout(struct work_struct *work) | |
1096 | { | |
1097 | struct ceph_osd_client *osdc = | |
1098 | container_of(work, struct ceph_osd_client, timeout_work.work); | |
83aff95e | 1099 | struct ceph_osd_request *req; |
f24e9980 | 1100 | struct ceph_osd *osd; |
422d2cb8 | 1101 | unsigned long keepalive = |
3d14c5d2 | 1102 | osdc->client->options->osd_keepalive_timeout * HZ; |
422d2cb8 | 1103 | struct list_head slow_osds; |
f24e9980 SW |
1104 | dout("timeout\n"); |
1105 | down_read(&osdc->map_sem); | |
1106 | ||
1107 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1108 | ||
1109 | mutex_lock(&osdc->request_mutex); | |
f24e9980 | 1110 | |
422d2cb8 YS |
1111 | /* |
1112 | * ping osds that are a bit slow. this ensures that if there | |
1113 | * is a break in the TCP connection we will notice, and reopen | |
1114 | * a connection with that osd (from the fault callback). | |
1115 | */ | |
1116 | INIT_LIST_HEAD(&slow_osds); | |
1117 | list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) { | |
3dd72fc0 | 1118 | if (time_before(jiffies, req->r_stamp + keepalive)) |
422d2cb8 YS |
1119 | break; |
1120 | ||
1121 | osd = req->r_osd; | |
1122 | BUG_ON(!osd); | |
1123 | dout(" tid %llu is slow, will send keepalive on osd%d\n", | |
f24e9980 | 1124 | req->r_tid, osd->o_osd); |
422d2cb8 YS |
1125 | list_move_tail(&osd->o_keepalive_item, &slow_osds); |
1126 | } | |
1127 | while (!list_empty(&slow_osds)) { | |
1128 | osd = list_entry(slow_osds.next, struct ceph_osd, | |
1129 | o_keepalive_item); | |
1130 | list_del_init(&osd->o_keepalive_item); | |
f24e9980 SW |
1131 | ceph_con_keepalive(&osd->o_con); |
1132 | } | |
1133 | ||
422d2cb8 | 1134 | __schedule_osd_timeout(osdc); |
f24e9980 | 1135 | mutex_unlock(&osdc->request_mutex); |
6f6c7006 | 1136 | send_queued(osdc); |
f24e9980 SW |
1137 | up_read(&osdc->map_sem); |
1138 | } | |
1139 | ||
f5a2041b YS |
1140 | static void handle_osds_timeout(struct work_struct *work) |
1141 | { | |
1142 | struct ceph_osd_client *osdc = | |
1143 | container_of(work, struct ceph_osd_client, | |
1144 | osds_timeout_work.work); | |
1145 | unsigned long delay = | |
3d14c5d2 | 1146 | osdc->client->options->osd_idle_ttl * HZ >> 2; |
f5a2041b YS |
1147 | |
1148 | dout("osds timeout\n"); | |
1149 | down_read(&osdc->map_sem); | |
aca420bc | 1150 | remove_old_osds(osdc); |
f5a2041b YS |
1151 | up_read(&osdc->map_sem); |
1152 | ||
1153 | schedule_delayed_work(&osdc->osds_timeout_work, | |
1154 | round_jiffies_relative(delay)); | |
1155 | } | |
1156 | ||
25845472 SW |
1157 | static void complete_request(struct ceph_osd_request *req) |
1158 | { | |
1159 | if (req->r_safe_callback) | |
1160 | req->r_safe_callback(req, NULL); | |
1161 | complete_all(&req->r_safe_completion); /* fsync waiter */ | |
1162 | } | |
1163 | ||
f24e9980 SW |
1164 | /* |
1165 | * handle osd op reply. either call the callback if it is specified, | |
1166 | * or do the completion to wake up the waiting thread. | |
1167 | */ | |
350b1c32 SW |
1168 | static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg, |
1169 | struct ceph_connection *con) | |
f24e9980 SW |
1170 | { |
1171 | struct ceph_osd_reply_head *rhead = msg->front.iov_base; | |
1172 | struct ceph_osd_request *req; | |
1173 | u64 tid; | |
1174 | int numops, object_len, flags; | |
0ceed5db | 1175 | s32 result; |
f24e9980 | 1176 | |
6df058c0 | 1177 | tid = le64_to_cpu(msg->hdr.tid); |
f24e9980 SW |
1178 | if (msg->front.iov_len < sizeof(*rhead)) |
1179 | goto bad; | |
f24e9980 SW |
1180 | numops = le32_to_cpu(rhead->num_ops); |
1181 | object_len = le32_to_cpu(rhead->object_len); | |
0ceed5db | 1182 | result = le32_to_cpu(rhead->result); |
f24e9980 SW |
1183 | if (msg->front.iov_len != sizeof(*rhead) + object_len + |
1184 | numops * sizeof(struct ceph_osd_op)) | |
1185 | goto bad; | |
0ceed5db | 1186 | dout("handle_reply %p tid %llu result %d\n", msg, tid, (int)result); |
f24e9980 SW |
1187 | /* lookup */ |
1188 | mutex_lock(&osdc->request_mutex); | |
1189 | req = __lookup_request(osdc, tid); | |
1190 | if (req == NULL) { | |
1191 | dout("handle_reply tid %llu dne\n", tid); | |
1192 | mutex_unlock(&osdc->request_mutex); | |
1193 | return; | |
1194 | } | |
1195 | ceph_osdc_get_request(req); | |
1196 | flags = le32_to_cpu(rhead->flags); | |
1197 | ||
350b1c32 | 1198 | /* |
0d59ab81 | 1199 | * if this connection filled our message, drop our reference now, to |
350b1c32 SW |
1200 | * avoid a (safe but slower) revoke later. |
1201 | */ | |
0d59ab81 | 1202 | if (req->r_con_filling_msg == con && req->r_reply == msg) { |
c16e7869 | 1203 | dout(" dropping con_filling_msg ref %p\n", con); |
0d59ab81 | 1204 | req->r_con_filling_msg = NULL; |
0d47766f | 1205 | con->ops->put(con); |
350b1c32 SW |
1206 | } |
1207 | ||
f24e9980 | 1208 | if (!req->r_got_reply) { |
95c96174 | 1209 | unsigned int bytes; |
f24e9980 SW |
1210 | |
1211 | req->r_result = le32_to_cpu(rhead->result); | |
1212 | bytes = le32_to_cpu(msg->hdr.data_len); | |
1213 | dout("handle_reply result %d bytes %d\n", req->r_result, | |
1214 | bytes); | |
1215 | if (req->r_result == 0) | |
1216 | req->r_result = bytes; | |
1217 | ||
1218 | /* in case this is a write and we need to replay, */ | |
1219 | req->r_reassert_version = rhead->reassert_version; | |
1220 | ||
1221 | req->r_got_reply = 1; | |
1222 | } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) { | |
1223 | dout("handle_reply tid %llu dup ack\n", tid); | |
34b43a56 | 1224 | mutex_unlock(&osdc->request_mutex); |
f24e9980 SW |
1225 | goto done; |
1226 | } | |
1227 | ||
1228 | dout("handle_reply tid %llu flags %d\n", tid, flags); | |
1229 | ||
a40c4f10 YS |
1230 | if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK)) |
1231 | __register_linger_request(osdc, req); | |
1232 | ||
f24e9980 | 1233 | /* either this is a read, or we got the safe response */ |
0ceed5db SW |
1234 | if (result < 0 || |
1235 | (flags & CEPH_OSD_FLAG_ONDISK) || | |
f24e9980 SW |
1236 | ((flags & CEPH_OSD_FLAG_WRITE) == 0)) |
1237 | __unregister_request(osdc, req); | |
1238 | ||
1239 | mutex_unlock(&osdc->request_mutex); | |
1240 | ||
1241 | if (req->r_callback) | |
1242 | req->r_callback(req, msg); | |
1243 | else | |
03066f23 | 1244 | complete_all(&req->r_completion); |
f24e9980 | 1245 | |
25845472 SW |
1246 | if (flags & CEPH_OSD_FLAG_ONDISK) |
1247 | complete_request(req); | |
f24e9980 SW |
1248 | |
1249 | done: | |
a40c4f10 | 1250 | dout("req=%p req->r_linger=%d\n", req, req->r_linger); |
f24e9980 SW |
1251 | ceph_osdc_put_request(req); |
1252 | return; | |
1253 | ||
1254 | bad: | |
1255 | pr_err("corrupt osd_op_reply got %d %d expected %d\n", | |
1256 | (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len), | |
1257 | (int)sizeof(*rhead)); | |
9ec7cab1 | 1258 | ceph_msg_dump(msg); |
f24e9980 SW |
1259 | } |
1260 | ||
6f6c7006 | 1261 | static void reset_changed_osds(struct ceph_osd_client *osdc) |
f24e9980 | 1262 | { |
f24e9980 | 1263 | struct rb_node *p, *n; |
f24e9980 | 1264 | |
6f6c7006 SW |
1265 | for (p = rb_first(&osdc->osds); p; p = n) { |
1266 | struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node); | |
f24e9980 | 1267 | |
6f6c7006 SW |
1268 | n = rb_next(p); |
1269 | if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || | |
1270 | memcmp(&osd->o_con.peer_addr, | |
1271 | ceph_osd_addr(osdc->osdmap, | |
1272 | osd->o_osd), | |
1273 | sizeof(struct ceph_entity_addr)) != 0) | |
1274 | __reset_osd(osdc, osd); | |
f24e9980 | 1275 | } |
422d2cb8 YS |
1276 | } |
1277 | ||
1278 | /* | |
6f6c7006 SW |
1279 | * Requeue requests whose mapping to an OSD has changed. If requests map to |
1280 | * no osd, request a new map. | |
422d2cb8 | 1281 | * |
e6d50f67 | 1282 | * Caller should hold map_sem for read. |
422d2cb8 | 1283 | */ |
38d6453c | 1284 | static void kick_requests(struct ceph_osd_client *osdc, int force_resend) |
422d2cb8 | 1285 | { |
a40c4f10 | 1286 | struct ceph_osd_request *req, *nreq; |
6f6c7006 SW |
1287 | struct rb_node *p; |
1288 | int needmap = 0; | |
1289 | int err; | |
422d2cb8 | 1290 | |
38d6453c | 1291 | dout("kick_requests %s\n", force_resend ? " (force resend)" : ""); |
422d2cb8 | 1292 | mutex_lock(&osdc->request_mutex); |
6194ea89 | 1293 | for (p = rb_first(&osdc->requests); p; ) { |
6f6c7006 | 1294 | req = rb_entry(p, struct ceph_osd_request, r_node); |
6194ea89 | 1295 | p = rb_next(p); |
ab60b16d AE |
1296 | |
1297 | /* | |
1298 | * For linger requests that have not yet been | |
1299 | * registered, move them to the linger list; they'll | |
1300 | * be sent to the osd in the loop below. Unregister | |
1301 | * the request before re-registering it as a linger | |
1302 | * request to ensure the __map_request() below | |
1303 | * will decide it needs to be sent. | |
1304 | */ | |
1305 | if (req->r_linger && list_empty(&req->r_linger_item)) { | |
1306 | dout("%p tid %llu restart on osd%d\n", | |
1307 | req, req->r_tid, | |
1308 | req->r_osd ? req->r_osd->o_osd : -1); | |
1309 | __unregister_request(osdc, req); | |
1310 | __register_linger_request(osdc, req); | |
1311 | continue; | |
1312 | } | |
1313 | ||
38d6453c | 1314 | err = __map_request(osdc, req, force_resend); |
6f6c7006 SW |
1315 | if (err < 0) |
1316 | continue; /* error */ | |
1317 | if (req->r_osd == NULL) { | |
1318 | dout("%p tid %llu maps to no osd\n", req, req->r_tid); | |
1319 | needmap++; /* request a newer map */ | |
1320 | } else if (err > 0) { | |
6194ea89 SW |
1321 | if (!req->r_linger) { |
1322 | dout("%p tid %llu requeued on osd%d\n", req, | |
1323 | req->r_tid, | |
1324 | req->r_osd ? req->r_osd->o_osd : -1); | |
a40c4f10 | 1325 | req->r_flags |= CEPH_OSD_FLAG_RETRY; |
6194ea89 SW |
1326 | } |
1327 | } | |
a40c4f10 YS |
1328 | } |
1329 | ||
1330 | list_for_each_entry_safe(req, nreq, &osdc->req_linger, | |
1331 | r_linger_item) { | |
1332 | dout("linger req=%p req->r_osd=%p\n", req, req->r_osd); | |
1333 | ||
38d6453c | 1334 | err = __map_request(osdc, req, force_resend); |
ab60b16d | 1335 | dout("__map_request returned %d\n", err); |
a40c4f10 YS |
1336 | if (err == 0) |
1337 | continue; /* no change and no osd was specified */ | |
1338 | if (err < 0) | |
1339 | continue; /* hrm! */ | |
1340 | if (req->r_osd == NULL) { | |
1341 | dout("tid %llu maps to no valid osd\n", req->r_tid); | |
1342 | needmap++; /* request a newer map */ | |
1343 | continue; | |
6f6c7006 | 1344 | } |
a40c4f10 YS |
1345 | |
1346 | dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid, | |
1347 | req->r_osd ? req->r_osd->o_osd : -1); | |
a40c4f10 | 1348 | __register_request(osdc, req); |
c89ce05e | 1349 | __unregister_linger_request(osdc, req); |
6f6c7006 | 1350 | } |
f24e9980 SW |
1351 | mutex_unlock(&osdc->request_mutex); |
1352 | ||
1353 | if (needmap) { | |
1354 | dout("%d requests for down osds, need new map\n", needmap); | |
1355 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1356 | } | |
e6d50f67 | 1357 | reset_changed_osds(osdc); |
422d2cb8 | 1358 | } |
6f6c7006 SW |
1359 | |
1360 | ||
f24e9980 SW |
1361 | /* |
1362 | * Process updated osd map. | |
1363 | * | |
1364 | * The message contains any number of incremental and full maps, normally | |
1365 | * indicating some sort of topology change in the cluster. Kick requests | |
1366 | * off to different OSDs as needed. | |
1367 | */ | |
1368 | void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) | |
1369 | { | |
1370 | void *p, *end, *next; | |
1371 | u32 nr_maps, maplen; | |
1372 | u32 epoch; | |
1373 | struct ceph_osdmap *newmap = NULL, *oldmap; | |
1374 | int err; | |
1375 | struct ceph_fsid fsid; | |
1376 | ||
1377 | dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0); | |
1378 | p = msg->front.iov_base; | |
1379 | end = p + msg->front.iov_len; | |
1380 | ||
1381 | /* verify fsid */ | |
1382 | ceph_decode_need(&p, end, sizeof(fsid), bad); | |
1383 | ceph_decode_copy(&p, &fsid, sizeof(fsid)); | |
0743304d SW |
1384 | if (ceph_check_fsid(osdc->client, &fsid) < 0) |
1385 | return; | |
f24e9980 SW |
1386 | |
1387 | down_write(&osdc->map_sem); | |
1388 | ||
1389 | /* incremental maps */ | |
1390 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
1391 | dout(" %d inc maps\n", nr_maps); | |
1392 | while (nr_maps > 0) { | |
1393 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
1394 | epoch = ceph_decode_32(&p); |
1395 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
1396 | ceph_decode_need(&p, end, maplen, bad); |
1397 | next = p + maplen; | |
1398 | if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) { | |
1399 | dout("applying incremental map %u len %d\n", | |
1400 | epoch, maplen); | |
1401 | newmap = osdmap_apply_incremental(&p, next, | |
1402 | osdc->osdmap, | |
15d9882c | 1403 | &osdc->client->msgr); |
f24e9980 SW |
1404 | if (IS_ERR(newmap)) { |
1405 | err = PTR_ERR(newmap); | |
1406 | goto bad; | |
1407 | } | |
30dc6381 | 1408 | BUG_ON(!newmap); |
f24e9980 SW |
1409 | if (newmap != osdc->osdmap) { |
1410 | ceph_osdmap_destroy(osdc->osdmap); | |
1411 | osdc->osdmap = newmap; | |
1412 | } | |
38d6453c | 1413 | kick_requests(osdc, 0); |
f24e9980 SW |
1414 | } else { |
1415 | dout("ignoring incremental map %u len %d\n", | |
1416 | epoch, maplen); | |
1417 | } | |
1418 | p = next; | |
1419 | nr_maps--; | |
1420 | } | |
1421 | if (newmap) | |
1422 | goto done; | |
1423 | ||
1424 | /* full maps */ | |
1425 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
1426 | dout(" %d full maps\n", nr_maps); | |
1427 | while (nr_maps) { | |
1428 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
1429 | epoch = ceph_decode_32(&p); |
1430 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
1431 | ceph_decode_need(&p, end, maplen, bad); |
1432 | if (nr_maps > 1) { | |
1433 | dout("skipping non-latest full map %u len %d\n", | |
1434 | epoch, maplen); | |
1435 | } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) { | |
1436 | dout("skipping full map %u len %d, " | |
1437 | "older than our %u\n", epoch, maplen, | |
1438 | osdc->osdmap->epoch); | |
1439 | } else { | |
38d6453c SW |
1440 | int skipped_map = 0; |
1441 | ||
f24e9980 SW |
1442 | dout("taking full map %u len %d\n", epoch, maplen); |
1443 | newmap = osdmap_decode(&p, p+maplen); | |
1444 | if (IS_ERR(newmap)) { | |
1445 | err = PTR_ERR(newmap); | |
1446 | goto bad; | |
1447 | } | |
30dc6381 | 1448 | BUG_ON(!newmap); |
f24e9980 SW |
1449 | oldmap = osdc->osdmap; |
1450 | osdc->osdmap = newmap; | |
38d6453c SW |
1451 | if (oldmap) { |
1452 | if (oldmap->epoch + 1 < newmap->epoch) | |
1453 | skipped_map = 1; | |
f24e9980 | 1454 | ceph_osdmap_destroy(oldmap); |
38d6453c SW |
1455 | } |
1456 | kick_requests(osdc, skipped_map); | |
f24e9980 SW |
1457 | } |
1458 | p += maplen; | |
1459 | nr_maps--; | |
1460 | } | |
1461 | ||
1462 | done: | |
1463 | downgrade_write(&osdc->map_sem); | |
1464 | ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch); | |
cd634fb6 SW |
1465 | |
1466 | /* | |
1467 | * subscribe to subsequent osdmap updates if full to ensure | |
1468 | * we find out when we are no longer full and stop returning | |
1469 | * ENOSPC. | |
1470 | */ | |
1471 | if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL)) | |
1472 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1473 | ||
6f6c7006 | 1474 | send_queued(osdc); |
f24e9980 | 1475 | up_read(&osdc->map_sem); |
03066f23 | 1476 | wake_up_all(&osdc->client->auth_wq); |
f24e9980 SW |
1477 | return; |
1478 | ||
1479 | bad: | |
1480 | pr_err("osdc handle_map corrupt msg\n"); | |
9ec7cab1 | 1481 | ceph_msg_dump(msg); |
f24e9980 SW |
1482 | up_write(&osdc->map_sem); |
1483 | return; | |
1484 | } | |
1485 | ||
a40c4f10 YS |
1486 | /* |
1487 | * watch/notify callback event infrastructure | |
1488 | * | |
1489 | * These callbacks are used both for watch and notify operations. | |
1490 | */ | |
1491 | static void __release_event(struct kref *kref) | |
1492 | { | |
1493 | struct ceph_osd_event *event = | |
1494 | container_of(kref, struct ceph_osd_event, kref); | |
1495 | ||
1496 | dout("__release_event %p\n", event); | |
1497 | kfree(event); | |
1498 | } | |
1499 | ||
1500 | static void get_event(struct ceph_osd_event *event) | |
1501 | { | |
1502 | kref_get(&event->kref); | |
1503 | } | |
1504 | ||
1505 | void ceph_osdc_put_event(struct ceph_osd_event *event) | |
1506 | { | |
1507 | kref_put(&event->kref, __release_event); | |
1508 | } | |
1509 | EXPORT_SYMBOL(ceph_osdc_put_event); | |
1510 | ||
1511 | static void __insert_event(struct ceph_osd_client *osdc, | |
1512 | struct ceph_osd_event *new) | |
1513 | { | |
1514 | struct rb_node **p = &osdc->event_tree.rb_node; | |
1515 | struct rb_node *parent = NULL; | |
1516 | struct ceph_osd_event *event = NULL; | |
1517 | ||
1518 | while (*p) { | |
1519 | parent = *p; | |
1520 | event = rb_entry(parent, struct ceph_osd_event, node); | |
1521 | if (new->cookie < event->cookie) | |
1522 | p = &(*p)->rb_left; | |
1523 | else if (new->cookie > event->cookie) | |
1524 | p = &(*p)->rb_right; | |
1525 | else | |
1526 | BUG(); | |
1527 | } | |
1528 | ||
1529 | rb_link_node(&new->node, parent, p); | |
1530 | rb_insert_color(&new->node, &osdc->event_tree); | |
1531 | } | |
1532 | ||
1533 | static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc, | |
1534 | u64 cookie) | |
1535 | { | |
1536 | struct rb_node **p = &osdc->event_tree.rb_node; | |
1537 | struct rb_node *parent = NULL; | |
1538 | struct ceph_osd_event *event = NULL; | |
1539 | ||
1540 | while (*p) { | |
1541 | parent = *p; | |
1542 | event = rb_entry(parent, struct ceph_osd_event, node); | |
1543 | if (cookie < event->cookie) | |
1544 | p = &(*p)->rb_left; | |
1545 | else if (cookie > event->cookie) | |
1546 | p = &(*p)->rb_right; | |
1547 | else | |
1548 | return event; | |
1549 | } | |
1550 | return NULL; | |
1551 | } | |
1552 | ||
1553 | static void __remove_event(struct ceph_osd_event *event) | |
1554 | { | |
1555 | struct ceph_osd_client *osdc = event->osdc; | |
1556 | ||
1557 | if (!RB_EMPTY_NODE(&event->node)) { | |
1558 | dout("__remove_event removed %p\n", event); | |
1559 | rb_erase(&event->node, &osdc->event_tree); | |
1560 | ceph_osdc_put_event(event); | |
1561 | } else { | |
1562 | dout("__remove_event didn't remove %p\n", event); | |
1563 | } | |
1564 | } | |
1565 | ||
1566 | int ceph_osdc_create_event(struct ceph_osd_client *osdc, | |
1567 | void (*event_cb)(u64, u64, u8, void *), | |
1568 | int one_shot, void *data, | |
1569 | struct ceph_osd_event **pevent) | |
1570 | { | |
1571 | struct ceph_osd_event *event; | |
1572 | ||
1573 | event = kmalloc(sizeof(*event), GFP_NOIO); | |
1574 | if (!event) | |
1575 | return -ENOMEM; | |
1576 | ||
1577 | dout("create_event %p\n", event); | |
1578 | event->cb = event_cb; | |
1579 | event->one_shot = one_shot; | |
1580 | event->data = data; | |
1581 | event->osdc = osdc; | |
1582 | INIT_LIST_HEAD(&event->osd_node); | |
3ee5234d | 1583 | RB_CLEAR_NODE(&event->node); |
a40c4f10 YS |
1584 | kref_init(&event->kref); /* one ref for us */ |
1585 | kref_get(&event->kref); /* one ref for the caller */ | |
1586 | init_completion(&event->completion); | |
1587 | ||
1588 | spin_lock(&osdc->event_lock); | |
1589 | event->cookie = ++osdc->event_count; | |
1590 | __insert_event(osdc, event); | |
1591 | spin_unlock(&osdc->event_lock); | |
1592 | ||
1593 | *pevent = event; | |
1594 | return 0; | |
1595 | } | |
1596 | EXPORT_SYMBOL(ceph_osdc_create_event); | |
1597 | ||
1598 | void ceph_osdc_cancel_event(struct ceph_osd_event *event) | |
1599 | { | |
1600 | struct ceph_osd_client *osdc = event->osdc; | |
1601 | ||
1602 | dout("cancel_event %p\n", event); | |
1603 | spin_lock(&osdc->event_lock); | |
1604 | __remove_event(event); | |
1605 | spin_unlock(&osdc->event_lock); | |
1606 | ceph_osdc_put_event(event); /* caller's */ | |
1607 | } | |
1608 | EXPORT_SYMBOL(ceph_osdc_cancel_event); | |
1609 | ||
1610 | ||
1611 | static void do_event_work(struct work_struct *work) | |
1612 | { | |
1613 | struct ceph_osd_event_work *event_work = | |
1614 | container_of(work, struct ceph_osd_event_work, work); | |
1615 | struct ceph_osd_event *event = event_work->event; | |
1616 | u64 ver = event_work->ver; | |
1617 | u64 notify_id = event_work->notify_id; | |
1618 | u8 opcode = event_work->opcode; | |
1619 | ||
1620 | dout("do_event_work completing %p\n", event); | |
1621 | event->cb(ver, notify_id, opcode, event->data); | |
1622 | complete(&event->completion); | |
1623 | dout("do_event_work completed %p\n", event); | |
1624 | ceph_osdc_put_event(event); | |
1625 | kfree(event_work); | |
1626 | } | |
1627 | ||
1628 | ||
1629 | /* | |
1630 | * Process osd watch notifications | |
1631 | */ | |
1632 | void handle_watch_notify(struct ceph_osd_client *osdc, struct ceph_msg *msg) | |
1633 | { | |
1634 | void *p, *end; | |
1635 | u8 proto_ver; | |
1636 | u64 cookie, ver, notify_id; | |
1637 | u8 opcode; | |
1638 | struct ceph_osd_event *event; | |
1639 | struct ceph_osd_event_work *event_work; | |
1640 | ||
1641 | p = msg->front.iov_base; | |
1642 | end = p + msg->front.iov_len; | |
1643 | ||
1644 | ceph_decode_8_safe(&p, end, proto_ver, bad); | |
1645 | ceph_decode_8_safe(&p, end, opcode, bad); | |
1646 | ceph_decode_64_safe(&p, end, cookie, bad); | |
1647 | ceph_decode_64_safe(&p, end, ver, bad); | |
1648 | ceph_decode_64_safe(&p, end, notify_id, bad); | |
1649 | ||
1650 | spin_lock(&osdc->event_lock); | |
1651 | event = __find_event(osdc, cookie); | |
1652 | if (event) { | |
1653 | get_event(event); | |
1654 | if (event->one_shot) | |
1655 | __remove_event(event); | |
1656 | } | |
1657 | spin_unlock(&osdc->event_lock); | |
1658 | dout("handle_watch_notify cookie %lld ver %lld event %p\n", | |
1659 | cookie, ver, event); | |
1660 | if (event) { | |
1661 | event_work = kmalloc(sizeof(*event_work), GFP_NOIO); | |
a40c4f10 YS |
1662 | if (!event_work) { |
1663 | dout("ERROR: could not allocate event_work\n"); | |
1664 | goto done_err; | |
1665 | } | |
6b0ae409 | 1666 | INIT_WORK(&event_work->work, do_event_work); |
a40c4f10 YS |
1667 | event_work->event = event; |
1668 | event_work->ver = ver; | |
1669 | event_work->notify_id = notify_id; | |
1670 | event_work->opcode = opcode; | |
1671 | if (!queue_work(osdc->notify_wq, &event_work->work)) { | |
1672 | dout("WARNING: failed to queue notify event work\n"); | |
1673 | goto done_err; | |
1674 | } | |
1675 | } | |
1676 | ||
1677 | return; | |
1678 | ||
1679 | done_err: | |
1680 | complete(&event->completion); | |
1681 | ceph_osdc_put_event(event); | |
1682 | return; | |
1683 | ||
1684 | bad: | |
1685 | pr_err("osdc handle_watch_notify corrupt msg\n"); | |
1686 | return; | |
1687 | } | |
1688 | ||
1689 | int ceph_osdc_wait_event(struct ceph_osd_event *event, unsigned long timeout) | |
1690 | { | |
1691 | int err; | |
1692 | ||
1693 | dout("wait_event %p\n", event); | |
1694 | err = wait_for_completion_interruptible_timeout(&event->completion, | |
1695 | timeout * HZ); | |
1696 | ceph_osdc_put_event(event); | |
1697 | if (err > 0) | |
1698 | err = 0; | |
1699 | dout("wait_event %p returns %d\n", event, err); | |
1700 | return err; | |
1701 | } | |
1702 | EXPORT_SYMBOL(ceph_osdc_wait_event); | |
1703 | ||
f24e9980 SW |
1704 | /* |
1705 | * Register request, send initial attempt. | |
1706 | */ | |
1707 | int ceph_osdc_start_request(struct ceph_osd_client *osdc, | |
1708 | struct ceph_osd_request *req, | |
1709 | bool nofail) | |
1710 | { | |
c1ea8823 | 1711 | int rc = 0; |
f24e9980 SW |
1712 | |
1713 | req->r_request->pages = req->r_pages; | |
1714 | req->r_request->nr_pages = req->r_num_pages; | |
68b4476b YS |
1715 | #ifdef CONFIG_BLOCK |
1716 | req->r_request->bio = req->r_bio; | |
1717 | #endif | |
1718 | req->r_request->trail = req->r_trail; | |
f24e9980 SW |
1719 | |
1720 | register_request(osdc, req); | |
1721 | ||
1722 | down_read(&osdc->map_sem); | |
1723 | mutex_lock(&osdc->request_mutex); | |
c1ea8823 SW |
1724 | /* |
1725 | * a racing kick_requests() may have sent the message for us | |
1726 | * while we dropped request_mutex above, so only send now if | |
1727 | * the request still han't been touched yet. | |
1728 | */ | |
1729 | if (req->r_sent == 0) { | |
38d6453c | 1730 | rc = __map_request(osdc, req, 0); |
9d6fcb08 SW |
1731 | if (rc < 0) { |
1732 | if (nofail) { | |
1733 | dout("osdc_start_request failed map, " | |
1734 | " will retry %lld\n", req->r_tid); | |
1735 | rc = 0; | |
1736 | } | |
234af26f | 1737 | goto out_unlock; |
9d6fcb08 | 1738 | } |
6f6c7006 SW |
1739 | if (req->r_osd == NULL) { |
1740 | dout("send_request %p no up osds in pg\n", req); | |
1741 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1742 | } else { | |
56e925b6 | 1743 | __send_request(osdc, req); |
f24e9980 | 1744 | } |
56e925b6 | 1745 | rc = 0; |
f24e9980 | 1746 | } |
234af26f DC |
1747 | |
1748 | out_unlock: | |
f24e9980 SW |
1749 | mutex_unlock(&osdc->request_mutex); |
1750 | up_read(&osdc->map_sem); | |
1751 | return rc; | |
1752 | } | |
3d14c5d2 | 1753 | EXPORT_SYMBOL(ceph_osdc_start_request); |
f24e9980 SW |
1754 | |
1755 | /* | |
1756 | * wait for a request to complete | |
1757 | */ | |
1758 | int ceph_osdc_wait_request(struct ceph_osd_client *osdc, | |
1759 | struct ceph_osd_request *req) | |
1760 | { | |
1761 | int rc; | |
1762 | ||
1763 | rc = wait_for_completion_interruptible(&req->r_completion); | |
1764 | if (rc < 0) { | |
1765 | mutex_lock(&osdc->request_mutex); | |
1766 | __cancel_request(req); | |
529cfcc4 | 1767 | __unregister_request(osdc, req); |
f24e9980 | 1768 | mutex_unlock(&osdc->request_mutex); |
25845472 | 1769 | complete_request(req); |
529cfcc4 | 1770 | dout("wait_request tid %llu canceled/timed out\n", req->r_tid); |
f24e9980 SW |
1771 | return rc; |
1772 | } | |
1773 | ||
1774 | dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result); | |
1775 | return req->r_result; | |
1776 | } | |
3d14c5d2 | 1777 | EXPORT_SYMBOL(ceph_osdc_wait_request); |
f24e9980 SW |
1778 | |
1779 | /* | |
1780 | * sync - wait for all in-flight requests to flush. avoid starvation. | |
1781 | */ | |
1782 | void ceph_osdc_sync(struct ceph_osd_client *osdc) | |
1783 | { | |
1784 | struct ceph_osd_request *req; | |
1785 | u64 last_tid, next_tid = 0; | |
1786 | ||
1787 | mutex_lock(&osdc->request_mutex); | |
1788 | last_tid = osdc->last_tid; | |
1789 | while (1) { | |
1790 | req = __lookup_request_ge(osdc, next_tid); | |
1791 | if (!req) | |
1792 | break; | |
1793 | if (req->r_tid > last_tid) | |
1794 | break; | |
1795 | ||
1796 | next_tid = req->r_tid + 1; | |
1797 | if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0) | |
1798 | continue; | |
1799 | ||
1800 | ceph_osdc_get_request(req); | |
1801 | mutex_unlock(&osdc->request_mutex); | |
1802 | dout("sync waiting on tid %llu (last is %llu)\n", | |
1803 | req->r_tid, last_tid); | |
1804 | wait_for_completion(&req->r_safe_completion); | |
1805 | mutex_lock(&osdc->request_mutex); | |
1806 | ceph_osdc_put_request(req); | |
1807 | } | |
1808 | mutex_unlock(&osdc->request_mutex); | |
1809 | dout("sync done (thru tid %llu)\n", last_tid); | |
1810 | } | |
3d14c5d2 | 1811 | EXPORT_SYMBOL(ceph_osdc_sync); |
f24e9980 SW |
1812 | |
1813 | /* | |
1814 | * init, shutdown | |
1815 | */ | |
1816 | int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) | |
1817 | { | |
1818 | int err; | |
1819 | ||
1820 | dout("init\n"); | |
1821 | osdc->client = client; | |
1822 | osdc->osdmap = NULL; | |
1823 | init_rwsem(&osdc->map_sem); | |
1824 | init_completion(&osdc->map_waiters); | |
1825 | osdc->last_requested_map = 0; | |
1826 | mutex_init(&osdc->request_mutex); | |
f24e9980 SW |
1827 | osdc->last_tid = 0; |
1828 | osdc->osds = RB_ROOT; | |
f5a2041b | 1829 | INIT_LIST_HEAD(&osdc->osd_lru); |
f24e9980 | 1830 | osdc->requests = RB_ROOT; |
422d2cb8 | 1831 | INIT_LIST_HEAD(&osdc->req_lru); |
6f6c7006 SW |
1832 | INIT_LIST_HEAD(&osdc->req_unsent); |
1833 | INIT_LIST_HEAD(&osdc->req_notarget); | |
a40c4f10 | 1834 | INIT_LIST_HEAD(&osdc->req_linger); |
f24e9980 SW |
1835 | osdc->num_requests = 0; |
1836 | INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); | |
f5a2041b | 1837 | INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); |
a40c4f10 YS |
1838 | spin_lock_init(&osdc->event_lock); |
1839 | osdc->event_tree = RB_ROOT; | |
1840 | osdc->event_count = 0; | |
f5a2041b YS |
1841 | |
1842 | schedule_delayed_work(&osdc->osds_timeout_work, | |
3d14c5d2 | 1843 | round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ)); |
f24e9980 | 1844 | |
5f44f142 | 1845 | err = -ENOMEM; |
f24e9980 SW |
1846 | osdc->req_mempool = mempool_create_kmalloc_pool(10, |
1847 | sizeof(struct ceph_osd_request)); | |
1848 | if (!osdc->req_mempool) | |
5f44f142 | 1849 | goto out; |
f24e9980 | 1850 | |
d50b409f SW |
1851 | err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, |
1852 | OSD_OP_FRONT_LEN, 10, true, | |
4f48280e | 1853 | "osd_op"); |
f24e9980 | 1854 | if (err < 0) |
5f44f142 | 1855 | goto out_mempool; |
d50b409f | 1856 | err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, |
4f48280e SW |
1857 | OSD_OPREPLY_FRONT_LEN, 10, true, |
1858 | "osd_op_reply"); | |
c16e7869 SW |
1859 | if (err < 0) |
1860 | goto out_msgpool; | |
a40c4f10 YS |
1861 | |
1862 | osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); | |
1863 | if (IS_ERR(osdc->notify_wq)) { | |
1864 | err = PTR_ERR(osdc->notify_wq); | |
1865 | osdc->notify_wq = NULL; | |
1866 | goto out_msgpool; | |
1867 | } | |
f24e9980 | 1868 | return 0; |
5f44f142 | 1869 | |
c16e7869 SW |
1870 | out_msgpool: |
1871 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
5f44f142 SW |
1872 | out_mempool: |
1873 | mempool_destroy(osdc->req_mempool); | |
1874 | out: | |
1875 | return err; | |
f24e9980 | 1876 | } |
3d14c5d2 | 1877 | EXPORT_SYMBOL(ceph_osdc_init); |
f24e9980 SW |
1878 | |
1879 | void ceph_osdc_stop(struct ceph_osd_client *osdc) | |
1880 | { | |
a40c4f10 YS |
1881 | flush_workqueue(osdc->notify_wq); |
1882 | destroy_workqueue(osdc->notify_wq); | |
f24e9980 | 1883 | cancel_delayed_work_sync(&osdc->timeout_work); |
f5a2041b | 1884 | cancel_delayed_work_sync(&osdc->osds_timeout_work); |
f24e9980 SW |
1885 | if (osdc->osdmap) { |
1886 | ceph_osdmap_destroy(osdc->osdmap); | |
1887 | osdc->osdmap = NULL; | |
1888 | } | |
aca420bc | 1889 | remove_all_osds(osdc); |
f24e9980 SW |
1890 | mempool_destroy(osdc->req_mempool); |
1891 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
c16e7869 | 1892 | ceph_msgpool_destroy(&osdc->msgpool_op_reply); |
f24e9980 | 1893 | } |
3d14c5d2 | 1894 | EXPORT_SYMBOL(ceph_osdc_stop); |
f24e9980 SW |
1895 | |
1896 | /* | |
1897 | * Read some contiguous pages. If we cross a stripe boundary, shorten | |
1898 | * *plen. Return number of bytes read, or error. | |
1899 | */ | |
1900 | int ceph_osdc_readpages(struct ceph_osd_client *osdc, | |
1901 | struct ceph_vino vino, struct ceph_file_layout *layout, | |
1902 | u64 off, u64 *plen, | |
1903 | u32 truncate_seq, u64 truncate_size, | |
b7495fc2 | 1904 | struct page **pages, int num_pages, int page_align) |
f24e9980 SW |
1905 | { |
1906 | struct ceph_osd_request *req; | |
1907 | int rc = 0; | |
1908 | ||
1909 | dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, | |
1910 | vino.snap, off, *plen); | |
1911 | req = ceph_osdc_new_request(osdc, layout, vino, off, plen, | |
1912 | CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, | |
1913 | NULL, 0, truncate_seq, truncate_size, NULL, | |
b7495fc2 | 1914 | false, 1, page_align); |
6816282d SW |
1915 | if (IS_ERR(req)) |
1916 | return PTR_ERR(req); | |
f24e9980 SW |
1917 | |
1918 | /* it may be a short read due to an object boundary */ | |
1919 | req->r_pages = pages; | |
f24e9980 | 1920 | |
b7495fc2 SW |
1921 | dout("readpages final extent is %llu~%llu (%d pages align %d)\n", |
1922 | off, *plen, req->r_num_pages, page_align); | |
f24e9980 SW |
1923 | |
1924 | rc = ceph_osdc_start_request(osdc, req, false); | |
1925 | if (!rc) | |
1926 | rc = ceph_osdc_wait_request(osdc, req); | |
1927 | ||
1928 | ceph_osdc_put_request(req); | |
1929 | dout("readpages result %d\n", rc); | |
1930 | return rc; | |
1931 | } | |
3d14c5d2 | 1932 | EXPORT_SYMBOL(ceph_osdc_readpages); |
f24e9980 SW |
1933 | |
1934 | /* | |
1935 | * do a synchronous write on N pages | |
1936 | */ | |
1937 | int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, | |
1938 | struct ceph_file_layout *layout, | |
1939 | struct ceph_snap_context *snapc, | |
1940 | u64 off, u64 len, | |
1941 | u32 truncate_seq, u64 truncate_size, | |
1942 | struct timespec *mtime, | |
1943 | struct page **pages, int num_pages, | |
1944 | int flags, int do_sync, bool nofail) | |
1945 | { | |
1946 | struct ceph_osd_request *req; | |
1947 | int rc = 0; | |
b7495fc2 | 1948 | int page_align = off & ~PAGE_MASK; |
f24e9980 SW |
1949 | |
1950 | BUG_ON(vino.snap != CEPH_NOSNAP); | |
1951 | req = ceph_osdc_new_request(osdc, layout, vino, off, &len, | |
1952 | CEPH_OSD_OP_WRITE, | |
1953 | flags | CEPH_OSD_FLAG_ONDISK | | |
1954 | CEPH_OSD_FLAG_WRITE, | |
1955 | snapc, do_sync, | |
1956 | truncate_seq, truncate_size, mtime, | |
b7495fc2 | 1957 | nofail, 1, page_align); |
6816282d SW |
1958 | if (IS_ERR(req)) |
1959 | return PTR_ERR(req); | |
f24e9980 SW |
1960 | |
1961 | /* it may be a short write due to an object boundary */ | |
1962 | req->r_pages = pages; | |
f24e9980 SW |
1963 | dout("writepages %llu~%llu (%d pages)\n", off, len, |
1964 | req->r_num_pages); | |
1965 | ||
1966 | rc = ceph_osdc_start_request(osdc, req, nofail); | |
1967 | if (!rc) | |
1968 | rc = ceph_osdc_wait_request(osdc, req); | |
1969 | ||
1970 | ceph_osdc_put_request(req); | |
1971 | if (rc == 0) | |
1972 | rc = len; | |
1973 | dout("writepages result %d\n", rc); | |
1974 | return rc; | |
1975 | } | |
3d14c5d2 | 1976 | EXPORT_SYMBOL(ceph_osdc_writepages); |
f24e9980 SW |
1977 | |
1978 | /* | |
1979 | * handle incoming message | |
1980 | */ | |
1981 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
1982 | { | |
1983 | struct ceph_osd *osd = con->private; | |
32c895e7 | 1984 | struct ceph_osd_client *osdc; |
f24e9980 SW |
1985 | int type = le16_to_cpu(msg->hdr.type); |
1986 | ||
1987 | if (!osd) | |
4a32f93d | 1988 | goto out; |
32c895e7 | 1989 | osdc = osd->o_osdc; |
f24e9980 SW |
1990 | |
1991 | switch (type) { | |
1992 | case CEPH_MSG_OSD_MAP: | |
1993 | ceph_osdc_handle_map(osdc, msg); | |
1994 | break; | |
1995 | case CEPH_MSG_OSD_OPREPLY: | |
350b1c32 | 1996 | handle_reply(osdc, msg, con); |
f24e9980 | 1997 | break; |
a40c4f10 YS |
1998 | case CEPH_MSG_WATCH_NOTIFY: |
1999 | handle_watch_notify(osdc, msg); | |
2000 | break; | |
f24e9980 SW |
2001 | |
2002 | default: | |
2003 | pr_err("received unknown message type %d %s\n", type, | |
2004 | ceph_msg_type_name(type)); | |
2005 | } | |
4a32f93d | 2006 | out: |
f24e9980 SW |
2007 | ceph_msg_put(msg); |
2008 | } | |
2009 | ||
5b3a4db3 | 2010 | /* |
21b667f6 SW |
2011 | * lookup and return message for incoming reply. set up reply message |
2012 | * pages. | |
5b3a4db3 SW |
2013 | */ |
2014 | static struct ceph_msg *get_reply(struct ceph_connection *con, | |
2450418c YS |
2015 | struct ceph_msg_header *hdr, |
2016 | int *skip) | |
f24e9980 SW |
2017 | { |
2018 | struct ceph_osd *osd = con->private; | |
2019 | struct ceph_osd_client *osdc = osd->o_osdc; | |
2450418c | 2020 | struct ceph_msg *m; |
0547a9b3 | 2021 | struct ceph_osd_request *req; |
5b3a4db3 SW |
2022 | int front = le32_to_cpu(hdr->front_len); |
2023 | int data_len = le32_to_cpu(hdr->data_len); | |
0547a9b3 | 2024 | u64 tid; |
f24e9980 | 2025 | |
0547a9b3 YS |
2026 | tid = le64_to_cpu(hdr->tid); |
2027 | mutex_lock(&osdc->request_mutex); | |
2028 | req = __lookup_request(osdc, tid); | |
2029 | if (!req) { | |
2030 | *skip = 1; | |
2031 | m = NULL; | |
756a16a5 SW |
2032 | dout("get_reply unknown tid %llu from osd%d\n", tid, |
2033 | osd->o_osd); | |
0547a9b3 YS |
2034 | goto out; |
2035 | } | |
c16e7869 SW |
2036 | |
2037 | if (req->r_con_filling_msg) { | |
8921d114 | 2038 | dout("%s revoking msg %p from old con %p\n", __func__, |
c16e7869 | 2039 | req->r_reply, req->r_con_filling_msg); |
8921d114 | 2040 | ceph_msg_revoke_incoming(req->r_reply); |
0d47766f | 2041 | req->r_con_filling_msg->ops->put(req->r_con_filling_msg); |
6f46cb29 | 2042 | req->r_con_filling_msg = NULL; |
0547a9b3 YS |
2043 | } |
2044 | ||
c16e7869 SW |
2045 | if (front > req->r_reply->front.iov_len) { |
2046 | pr_warning("get_reply front %d > preallocated %d\n", | |
2047 | front, (int)req->r_reply->front.iov_len); | |
b61c2763 | 2048 | m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS, false); |
a79832f2 | 2049 | if (!m) |
c16e7869 SW |
2050 | goto out; |
2051 | ceph_msg_put(req->r_reply); | |
2052 | req->r_reply = m; | |
2053 | } | |
2054 | m = ceph_msg_get(req->r_reply); | |
2055 | ||
0547a9b3 | 2056 | if (data_len > 0) { |
b7495fc2 | 2057 | int want = calc_pages_for(req->r_page_alignment, data_len); |
21b667f6 SW |
2058 | |
2059 | if (unlikely(req->r_num_pages < want)) { | |
9bb0ce2b SW |
2060 | pr_warning("tid %lld reply has %d bytes %d pages, we" |
2061 | " had only %d pages ready\n", tid, data_len, | |
2062 | want, req->r_num_pages); | |
0547a9b3 YS |
2063 | *skip = 1; |
2064 | ceph_msg_put(m); | |
a79832f2 | 2065 | m = NULL; |
21b667f6 | 2066 | goto out; |
0547a9b3 | 2067 | } |
21b667f6 SW |
2068 | m->pages = req->r_pages; |
2069 | m->nr_pages = req->r_num_pages; | |
c5c6b19d | 2070 | m->page_alignment = req->r_page_alignment; |
68b4476b YS |
2071 | #ifdef CONFIG_BLOCK |
2072 | m->bio = req->r_bio; | |
2073 | #endif | |
0547a9b3 | 2074 | } |
5b3a4db3 | 2075 | *skip = 0; |
0d47766f | 2076 | req->r_con_filling_msg = con->ops->get(con); |
c16e7869 | 2077 | dout("get_reply tid %lld %p\n", tid, m); |
0547a9b3 YS |
2078 | |
2079 | out: | |
2080 | mutex_unlock(&osdc->request_mutex); | |
2450418c | 2081 | return m; |
5b3a4db3 SW |
2082 | |
2083 | } | |
2084 | ||
2085 | static struct ceph_msg *alloc_msg(struct ceph_connection *con, | |
2086 | struct ceph_msg_header *hdr, | |
2087 | int *skip) | |
2088 | { | |
2089 | struct ceph_osd *osd = con->private; | |
2090 | int type = le16_to_cpu(hdr->type); | |
2091 | int front = le32_to_cpu(hdr->front_len); | |
2092 | ||
1c20f2d2 | 2093 | *skip = 0; |
5b3a4db3 SW |
2094 | switch (type) { |
2095 | case CEPH_MSG_OSD_MAP: | |
a40c4f10 | 2096 | case CEPH_MSG_WATCH_NOTIFY: |
b61c2763 | 2097 | return ceph_msg_new(type, front, GFP_NOFS, false); |
5b3a4db3 SW |
2098 | case CEPH_MSG_OSD_OPREPLY: |
2099 | return get_reply(con, hdr, skip); | |
2100 | default: | |
2101 | pr_info("alloc_msg unexpected msg type %d from osd%d\n", type, | |
2102 | osd->o_osd); | |
2103 | *skip = 1; | |
2104 | return NULL; | |
2105 | } | |
f24e9980 SW |
2106 | } |
2107 | ||
2108 | /* | |
2109 | * Wrappers to refcount containing ceph_osd struct | |
2110 | */ | |
2111 | static struct ceph_connection *get_osd_con(struct ceph_connection *con) | |
2112 | { | |
2113 | struct ceph_osd *osd = con->private; | |
2114 | if (get_osd(osd)) | |
2115 | return con; | |
2116 | return NULL; | |
2117 | } | |
2118 | ||
2119 | static void put_osd_con(struct ceph_connection *con) | |
2120 | { | |
2121 | struct ceph_osd *osd = con->private; | |
2122 | put_osd(osd); | |
2123 | } | |
2124 | ||
4e7a5dcd SW |
2125 | /* |
2126 | * authentication | |
2127 | */ | |
a3530df3 AE |
2128 | /* |
2129 | * Note: returned pointer is the address of a structure that's | |
2130 | * managed separately. Caller must *not* attempt to free it. | |
2131 | */ | |
2132 | static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, | |
8f43fb53 | 2133 | int *proto, int force_new) |
4e7a5dcd SW |
2134 | { |
2135 | struct ceph_osd *o = con->private; | |
2136 | struct ceph_osd_client *osdc = o->o_osdc; | |
2137 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
74f1869f | 2138 | struct ceph_auth_handshake *auth = &o->o_auth; |
4e7a5dcd | 2139 | |
74f1869f | 2140 | if (force_new && auth->authorizer) { |
a255651d AE |
2141 | if (ac->ops && ac->ops->destroy_authorizer) |
2142 | ac->ops->destroy_authorizer(ac, auth->authorizer); | |
74f1869f AE |
2143 | auth->authorizer = NULL; |
2144 | } | |
a255651d | 2145 | if (!auth->authorizer && ac->ops && ac->ops->create_authorizer) { |
a3530df3 AE |
2146 | int ret = ac->ops->create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, |
2147 | auth); | |
4e7a5dcd | 2148 | if (ret) |
a3530df3 | 2149 | return ERR_PTR(ret); |
4e7a5dcd | 2150 | } |
4e7a5dcd | 2151 | *proto = ac->protocol; |
74f1869f | 2152 | |
a3530df3 | 2153 | return auth; |
4e7a5dcd SW |
2154 | } |
2155 | ||
2156 | ||
2157 | static int verify_authorizer_reply(struct ceph_connection *con, int len) | |
2158 | { | |
2159 | struct ceph_osd *o = con->private; | |
2160 | struct ceph_osd_client *osdc = o->o_osdc; | |
2161 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
2162 | ||
a255651d AE |
2163 | /* |
2164 | * XXX If ac->ops or ac->ops->verify_authorizer_reply is null, | |
2165 | * XXX which do we do: succeed or fail? | |
2166 | */ | |
6c4a1915 | 2167 | return ac->ops->verify_authorizer_reply(ac, o->o_auth.authorizer, len); |
4e7a5dcd SW |
2168 | } |
2169 | ||
9bd2e6f8 SW |
2170 | static int invalidate_authorizer(struct ceph_connection *con) |
2171 | { | |
2172 | struct ceph_osd *o = con->private; | |
2173 | struct ceph_osd_client *osdc = o->o_osdc; | |
2174 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
2175 | ||
a255651d | 2176 | if (ac->ops && ac->ops->invalidate_authorizer) |
9bd2e6f8 SW |
2177 | ac->ops->invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); |
2178 | ||
2179 | return ceph_monc_validate_auth(&osdc->client->monc); | |
2180 | } | |
4e7a5dcd | 2181 | |
9e32789f | 2182 | static const struct ceph_connection_operations osd_con_ops = { |
f24e9980 SW |
2183 | .get = get_osd_con, |
2184 | .put = put_osd_con, | |
2185 | .dispatch = dispatch, | |
4e7a5dcd SW |
2186 | .get_authorizer = get_authorizer, |
2187 | .verify_authorizer_reply = verify_authorizer_reply, | |
9bd2e6f8 | 2188 | .invalidate_authorizer = invalidate_authorizer, |
f24e9980 | 2189 | .alloc_msg = alloc_msg, |
81b024e7 | 2190 | .fault = osd_reset, |
f24e9980 | 2191 | }; |