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