Commit | Line | Data |
---|---|---|
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); | |
224 | INIT_LIST_HEAD(&req->r_unsafe_item); | |
a40c4f10 YS |
225 | INIT_LIST_HEAD(&req->r_linger_item); |
226 | INIT_LIST_HEAD(&req->r_linger_osd); | |
935b639a | 227 | INIT_LIST_HEAD(&req->r_req_lru_item); |
cd43045c SW |
228 | INIT_LIST_HEAD(&req->r_osd_item); |
229 | ||
f24e9980 SW |
230 | req->r_flags = flags; |
231 | ||
232 | WARN_ON((flags & (CEPH_OSD_FLAG_READ|CEPH_OSD_FLAG_WRITE)) == 0); | |
233 | ||
c16e7869 SW |
234 | /* create reply message */ |
235 | if (use_mempool) | |
236 | msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); | |
237 | else | |
238 | msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, | |
b61c2763 | 239 | OSD_OPREPLY_FRONT_LEN, gfp_flags, true); |
a79832f2 | 240 | if (!msg) { |
c16e7869 | 241 | ceph_osdc_put_request(req); |
a79832f2 | 242 | return NULL; |
c16e7869 SW |
243 | } |
244 | req->r_reply = msg; | |
245 | ||
68b4476b YS |
246 | /* allocate space for the trailing data */ |
247 | if (needs_trail) { | |
248 | req->r_trail = kmalloc(sizeof(struct ceph_pagelist), gfp_flags); | |
249 | if (!req->r_trail) { | |
250 | ceph_osdc_put_request(req); | |
251 | return NULL; | |
252 | } | |
253 | ceph_pagelist_init(req->r_trail); | |
254 | } | |
d50b409f | 255 | |
c16e7869 | 256 | /* create request message; allow space for oid */ |
224736d9 | 257 | msg_size += MAX_OBJ_NAME_SIZE; |
f24e9980 SW |
258 | if (snapc) |
259 | msg_size += sizeof(u64) * snapc->num_snaps; | |
260 | if (use_mempool) | |
8f3bc053 | 261 | msg = ceph_msgpool_get(&osdc->msgpool_op, 0); |
f24e9980 | 262 | else |
b61c2763 | 263 | msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true); |
a79832f2 | 264 | if (!msg) { |
f24e9980 | 265 | ceph_osdc_put_request(req); |
a79832f2 | 266 | return NULL; |
f24e9980 | 267 | } |
68b4476b | 268 | |
f24e9980 | 269 | memset(msg->front.iov_base, 0, msg->front.iov_len); |
3499e8a5 YS |
270 | |
271 | req->r_request = msg; | |
272 | req->r_pages = pages; | |
68b4476b YS |
273 | #ifdef CONFIG_BLOCK |
274 | if (bio) { | |
275 | req->r_bio = bio; | |
276 | bio_get(req->r_bio); | |
277 | } | |
278 | #endif | |
3499e8a5 YS |
279 | |
280 | return req; | |
281 | } | |
3d14c5d2 | 282 | EXPORT_SYMBOL(ceph_osdc_alloc_request); |
3499e8a5 | 283 | |
68b4476b YS |
284 | static void osd_req_encode_op(struct ceph_osd_request *req, |
285 | struct ceph_osd_op *dst, | |
286 | struct ceph_osd_req_op *src) | |
287 | { | |
288 | dst->op = cpu_to_le16(src->op); | |
289 | ||
065a68f9 | 290 | switch (src->op) { |
68b4476b YS |
291 | case CEPH_OSD_OP_READ: |
292 | case CEPH_OSD_OP_WRITE: | |
293 | dst->extent.offset = | |
294 | cpu_to_le64(src->extent.offset); | |
295 | dst->extent.length = | |
296 | cpu_to_le64(src->extent.length); | |
297 | dst->extent.truncate_size = | |
298 | cpu_to_le64(src->extent.truncate_size); | |
299 | dst->extent.truncate_seq = | |
300 | cpu_to_le32(src->extent.truncate_seq); | |
301 | break; | |
302 | ||
303 | case CEPH_OSD_OP_GETXATTR: | |
304 | case CEPH_OSD_OP_SETXATTR: | |
305 | case CEPH_OSD_OP_CMPXATTR: | |
306 | BUG_ON(!req->r_trail); | |
307 | ||
308 | dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); | |
309 | dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); | |
310 | dst->xattr.cmp_op = src->xattr.cmp_op; | |
311 | dst->xattr.cmp_mode = src->xattr.cmp_mode; | |
312 | ceph_pagelist_append(req->r_trail, src->xattr.name, | |
313 | src->xattr.name_len); | |
314 | ceph_pagelist_append(req->r_trail, src->xattr.val, | |
315 | src->xattr.value_len); | |
316 | break; | |
ae1533b6 YS |
317 | case CEPH_OSD_OP_CALL: |
318 | BUG_ON(!req->r_trail); | |
319 | ||
320 | dst->cls.class_len = src->cls.class_len; | |
321 | dst->cls.method_len = src->cls.method_len; | |
322 | dst->cls.indata_len = cpu_to_le32(src->cls.indata_len); | |
323 | ||
324 | ceph_pagelist_append(req->r_trail, src->cls.class_name, | |
325 | src->cls.class_len); | |
326 | ceph_pagelist_append(req->r_trail, src->cls.method_name, | |
327 | src->cls.method_len); | |
328 | ceph_pagelist_append(req->r_trail, src->cls.indata, | |
329 | src->cls.indata_len); | |
330 | break; | |
331 | case CEPH_OSD_OP_ROLLBACK: | |
332 | dst->snap.snapid = cpu_to_le64(src->snap.snapid); | |
333 | break; | |
68b4476b YS |
334 | case CEPH_OSD_OP_STARTSYNC: |
335 | break; | |
a40c4f10 YS |
336 | case CEPH_OSD_OP_NOTIFY: |
337 | { | |
338 | __le32 prot_ver = cpu_to_le32(src->watch.prot_ver); | |
339 | __le32 timeout = cpu_to_le32(src->watch.timeout); | |
340 | ||
341 | BUG_ON(!req->r_trail); | |
342 | ||
343 | ceph_pagelist_append(req->r_trail, | |
344 | &prot_ver, sizeof(prot_ver)); | |
345 | ceph_pagelist_append(req->r_trail, | |
346 | &timeout, sizeof(timeout)); | |
347 | } | |
348 | case CEPH_OSD_OP_NOTIFY_ACK: | |
349 | case CEPH_OSD_OP_WATCH: | |
350 | dst->watch.cookie = cpu_to_le64(src->watch.cookie); | |
351 | dst->watch.ver = cpu_to_le64(src->watch.ver); | |
352 | dst->watch.flag = src->watch.flag; | |
353 | break; | |
68b4476b YS |
354 | default: |
355 | pr_err("unrecognized osd opcode %d\n", dst->op); | |
356 | WARN_ON(1); | |
357 | break; | |
358 | } | |
359 | dst->payload_len = cpu_to_le32(src->payload_len); | |
360 | } | |
361 | ||
3499e8a5 YS |
362 | /* |
363 | * build new request AND message | |
364 | * | |
365 | */ | |
366 | void ceph_osdc_build_request(struct ceph_osd_request *req, | |
68b4476b YS |
367 | u64 off, u64 *plen, |
368 | struct ceph_osd_req_op *src_ops, | |
369 | struct ceph_snap_context *snapc, | |
370 | struct timespec *mtime, | |
371 | const char *oid, | |
372 | int oid_len) | |
3499e8a5 YS |
373 | { |
374 | struct ceph_msg *msg = req->r_request; | |
375 | struct ceph_osd_request_head *head; | |
68b4476b | 376 | struct ceph_osd_req_op *src_op; |
3499e8a5 YS |
377 | struct ceph_osd_op *op; |
378 | void *p; | |
68b4476b | 379 | int num_op = get_num_ops(src_ops, NULL); |
3499e8a5 | 380 | size_t msg_size = sizeof(*head) + num_op*sizeof(*op); |
3499e8a5 | 381 | int flags = req->r_flags; |
68b4476b YS |
382 | u64 data_len = 0; |
383 | int i; | |
3499e8a5 | 384 | |
f24e9980 SW |
385 | head = msg->front.iov_base; |
386 | op = (void *)(head + 1); | |
387 | p = (void *)(op + num_op); | |
388 | ||
f24e9980 SW |
389 | req->r_snapc = ceph_get_snap_context(snapc); |
390 | ||
391 | head->client_inc = cpu_to_le32(1); /* always, for now. */ | |
392 | head->flags = cpu_to_le32(flags); | |
393 | if (flags & CEPH_OSD_FLAG_WRITE) | |
394 | ceph_encode_timespec(&head->mtime, mtime); | |
395 | head->num_ops = cpu_to_le16(num_op); | |
f24e9980 | 396 | |
f24e9980 SW |
397 | |
398 | /* fill in oid */ | |
3499e8a5 YS |
399 | head->object_len = cpu_to_le32(oid_len); |
400 | memcpy(p, oid, oid_len); | |
401 | p += oid_len; | |
f24e9980 | 402 | |
68b4476b YS |
403 | src_op = src_ops; |
404 | while (src_op->op) { | |
405 | osd_req_encode_op(req, op, src_op); | |
406 | src_op++; | |
f24e9980 | 407 | op++; |
f24e9980 | 408 | } |
68b4476b YS |
409 | |
410 | if (req->r_trail) | |
411 | data_len += req->r_trail->length; | |
412 | ||
f24e9980 SW |
413 | if (snapc) { |
414 | head->snap_seq = cpu_to_le64(snapc->seq); | |
415 | head->num_snaps = cpu_to_le32(snapc->num_snaps); | |
416 | for (i = 0; i < snapc->num_snaps; i++) { | |
417 | put_unaligned_le64(snapc->snaps[i], p); | |
418 | p += sizeof(u64); | |
419 | } | |
420 | } | |
421 | ||
68b4476b YS |
422 | if (flags & CEPH_OSD_FLAG_WRITE) { |
423 | req->r_request->hdr.data_off = cpu_to_le16(off); | |
424 | req->r_request->hdr.data_len = cpu_to_le32(*plen + data_len); | |
425 | } else if (data_len) { | |
426 | req->r_request->hdr.data_off = 0; | |
427 | req->r_request->hdr.data_len = cpu_to_le32(data_len); | |
428 | } | |
429 | ||
c5c6b19d SW |
430 | req->r_request->page_alignment = req->r_page_alignment; |
431 | ||
f24e9980 | 432 | BUG_ON(p > msg->front.iov_base + msg->front.iov_len); |
6f863e71 SW |
433 | msg_size = p - msg->front.iov_base; |
434 | msg->front.iov_len = msg_size; | |
435 | msg->hdr.front_len = cpu_to_le32(msg_size); | |
3499e8a5 YS |
436 | return; |
437 | } | |
3d14c5d2 | 438 | EXPORT_SYMBOL(ceph_osdc_build_request); |
3499e8a5 YS |
439 | |
440 | /* | |
441 | * build new request AND message, calculate layout, and adjust file | |
442 | * extent as needed. | |
443 | * | |
444 | * if the file was recently truncated, we include information about its | |
445 | * old and new size so that the object can be updated appropriately. (we | |
446 | * avoid synchronously deleting truncated objects because it's slow.) | |
447 | * | |
448 | * if @do_sync, include a 'startsync' command so that the osd will flush | |
449 | * data quickly. | |
450 | */ | |
451 | struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, | |
452 | struct ceph_file_layout *layout, | |
453 | struct ceph_vino vino, | |
454 | u64 off, u64 *plen, | |
455 | int opcode, int flags, | |
456 | struct ceph_snap_context *snapc, | |
457 | int do_sync, | |
458 | u32 truncate_seq, | |
459 | u64 truncate_size, | |
460 | struct timespec *mtime, | |
b7495fc2 SW |
461 | bool use_mempool, int num_reply, |
462 | int page_align) | |
3499e8a5 | 463 | { |
68b4476b YS |
464 | struct ceph_osd_req_op ops[3]; |
465 | struct ceph_osd_request *req; | |
6816282d | 466 | int r; |
68b4476b YS |
467 | |
468 | ops[0].op = opcode; | |
469 | ops[0].extent.truncate_seq = truncate_seq; | |
470 | ops[0].extent.truncate_size = truncate_size; | |
471 | ops[0].payload_len = 0; | |
472 | ||
473 | if (do_sync) { | |
474 | ops[1].op = CEPH_OSD_OP_STARTSYNC; | |
475 | ops[1].payload_len = 0; | |
476 | ops[2].op = 0; | |
477 | } else | |
478 | ops[1].op = 0; | |
479 | ||
480 | req = ceph_osdc_alloc_request(osdc, flags, | |
481 | snapc, ops, | |
3499e8a5 | 482 | use_mempool, |
68b4476b | 483 | GFP_NOFS, NULL, NULL); |
4ad12621 | 484 | if (!req) |
6816282d | 485 | return ERR_PTR(-ENOMEM); |
3499e8a5 YS |
486 | |
487 | /* calculate max write size */ | |
6816282d SW |
488 | r = calc_layout(osdc, vino, layout, off, plen, req, ops); |
489 | if (r < 0) | |
490 | return ERR_PTR(r); | |
3499e8a5 YS |
491 | req->r_file_layout = *layout; /* keep a copy */ |
492 | ||
9bb0ce2b SW |
493 | /* in case it differs from natural (file) alignment that |
494 | calc_layout filled in for us */ | |
495 | req->r_num_pages = calc_pages_for(page_align, *plen); | |
b7495fc2 SW |
496 | req->r_page_alignment = page_align; |
497 | ||
68b4476b YS |
498 | ceph_osdc_build_request(req, off, plen, ops, |
499 | snapc, | |
3499e8a5 YS |
500 | mtime, |
501 | req->r_oid, req->r_oid_len); | |
502 | ||
f24e9980 SW |
503 | return req; |
504 | } | |
3d14c5d2 | 505 | EXPORT_SYMBOL(ceph_osdc_new_request); |
f24e9980 SW |
506 | |
507 | /* | |
508 | * We keep osd requests in an rbtree, sorted by ->r_tid. | |
509 | */ | |
510 | static void __insert_request(struct ceph_osd_client *osdc, | |
511 | struct ceph_osd_request *new) | |
512 | { | |
513 | struct rb_node **p = &osdc->requests.rb_node; | |
514 | struct rb_node *parent = NULL; | |
515 | struct ceph_osd_request *req = NULL; | |
516 | ||
517 | while (*p) { | |
518 | parent = *p; | |
519 | req = rb_entry(parent, struct ceph_osd_request, r_node); | |
520 | if (new->r_tid < req->r_tid) | |
521 | p = &(*p)->rb_left; | |
522 | else if (new->r_tid > req->r_tid) | |
523 | p = &(*p)->rb_right; | |
524 | else | |
525 | BUG(); | |
526 | } | |
527 | ||
528 | rb_link_node(&new->r_node, parent, p); | |
529 | rb_insert_color(&new->r_node, &osdc->requests); | |
530 | } | |
531 | ||
532 | static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc, | |
533 | u64 tid) | |
534 | { | |
535 | struct ceph_osd_request *req; | |
536 | struct rb_node *n = osdc->requests.rb_node; | |
537 | ||
538 | while (n) { | |
539 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
540 | if (tid < req->r_tid) | |
541 | n = n->rb_left; | |
542 | else if (tid > req->r_tid) | |
543 | n = n->rb_right; | |
544 | else | |
545 | return req; | |
546 | } | |
547 | return NULL; | |
548 | } | |
549 | ||
550 | static struct ceph_osd_request * | |
551 | __lookup_request_ge(struct ceph_osd_client *osdc, | |
552 | u64 tid) | |
553 | { | |
554 | struct ceph_osd_request *req; | |
555 | struct rb_node *n = osdc->requests.rb_node; | |
556 | ||
557 | while (n) { | |
558 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
559 | if (tid < req->r_tid) { | |
560 | if (!n->rb_left) | |
561 | return req; | |
562 | n = n->rb_left; | |
563 | } else if (tid > req->r_tid) { | |
564 | n = n->rb_right; | |
565 | } else { | |
566 | return req; | |
567 | } | |
568 | } | |
569 | return NULL; | |
570 | } | |
571 | ||
6f6c7006 SW |
572 | /* |
573 | * Resubmit requests pending on the given osd. | |
574 | */ | |
575 | static void __kick_osd_requests(struct ceph_osd_client *osdc, | |
576 | struct ceph_osd *osd) | |
577 | { | |
a40c4f10 | 578 | struct ceph_osd_request *req, *nreq; |
6f6c7006 SW |
579 | int err; |
580 | ||
581 | dout("__kick_osd_requests osd%d\n", osd->o_osd); | |
582 | err = __reset_osd(osdc, osd); | |
583 | if (err == -EAGAIN) | |
584 | return; | |
585 | ||
586 | list_for_each_entry(req, &osd->o_requests, r_osd_item) { | |
587 | list_move(&req->r_req_lru_item, &osdc->req_unsent); | |
588 | dout("requeued %p tid %llu osd%d\n", req, req->r_tid, | |
589 | osd->o_osd); | |
a40c4f10 YS |
590 | if (!req->r_linger) |
591 | req->r_flags |= CEPH_OSD_FLAG_RETRY; | |
592 | } | |
593 | ||
594 | list_for_each_entry_safe(req, nreq, &osd->o_linger_requests, | |
595 | r_linger_osd) { | |
77f38e0e SW |
596 | /* |
597 | * reregister request prior to unregistering linger so | |
598 | * that r_osd is preserved. | |
599 | */ | |
600 | BUG_ON(!list_empty(&req->r_req_lru_item)); | |
a40c4f10 | 601 | __register_request(osdc, req); |
77f38e0e SW |
602 | list_add(&req->r_req_lru_item, &osdc->req_unsent); |
603 | list_add(&req->r_osd_item, &req->r_osd->o_requests); | |
604 | __unregister_linger_request(osdc, req); | |
a40c4f10 YS |
605 | dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid, |
606 | osd->o_osd); | |
6f6c7006 SW |
607 | } |
608 | } | |
609 | ||
610 | static void kick_osd_requests(struct ceph_osd_client *osdc, | |
611 | struct ceph_osd *kickosd) | |
612 | { | |
613 | mutex_lock(&osdc->request_mutex); | |
614 | __kick_osd_requests(osdc, kickosd); | |
615 | mutex_unlock(&osdc->request_mutex); | |
616 | } | |
f24e9980 SW |
617 | |
618 | /* | |
81b024e7 | 619 | * If the osd connection drops, we need to resubmit all requests. |
f24e9980 SW |
620 | */ |
621 | static void osd_reset(struct ceph_connection *con) | |
622 | { | |
623 | struct ceph_osd *osd = con->private; | |
624 | struct ceph_osd_client *osdc; | |
625 | ||
626 | if (!osd) | |
627 | return; | |
628 | dout("osd_reset osd%d\n", osd->o_osd); | |
629 | osdc = osd->o_osdc; | |
f24e9980 | 630 | down_read(&osdc->map_sem); |
6f6c7006 SW |
631 | kick_osd_requests(osdc, osd); |
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; |
f24e9980 | 650 | INIT_LIST_HEAD(&osd->o_requests); |
a40c4f10 | 651 | INIT_LIST_HEAD(&osd->o_linger_requests); |
f5a2041b | 652 | INIT_LIST_HEAD(&osd->o_osd_lru); |
f24e9980 SW |
653 | osd->o_incarnation = 1; |
654 | ||
b7a9e5dd | 655 | ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); |
4e7a5dcd | 656 | |
422d2cb8 | 657 | INIT_LIST_HEAD(&osd->o_keepalive_item); |
f24e9980 SW |
658 | return osd; |
659 | } | |
660 | ||
661 | static struct ceph_osd *get_osd(struct ceph_osd *osd) | |
662 | { | |
663 | if (atomic_inc_not_zero(&osd->o_ref)) { | |
664 | dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1, | |
665 | atomic_read(&osd->o_ref)); | |
666 | return osd; | |
667 | } else { | |
668 | dout("get_osd %p FAIL\n", osd); | |
669 | return NULL; | |
670 | } | |
671 | } | |
672 | ||
673 | static void put_osd(struct ceph_osd *osd) | |
674 | { | |
675 | dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref), | |
676 | atomic_read(&osd->o_ref) - 1); | |
a255651d | 677 | if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) { |
79494d1b SW |
678 | struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth; |
679 | ||
a255651d | 680 | if (ac->ops && ac->ops->destroy_authorizer) |
6c4a1915 | 681 | ac->ops->destroy_authorizer(ac, osd->o_auth.authorizer); |
f24e9980 | 682 | kfree(osd); |
79494d1b | 683 | } |
f24e9980 SW |
684 | } |
685 | ||
686 | /* | |
687 | * remove an osd from our map | |
688 | */ | |
f5a2041b | 689 | static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) |
f24e9980 | 690 | { |
f5a2041b | 691 | dout("__remove_osd %p\n", osd); |
f24e9980 SW |
692 | BUG_ON(!list_empty(&osd->o_requests)); |
693 | rb_erase(&osd->o_node, &osdc->osds); | |
f5a2041b | 694 | list_del_init(&osd->o_osd_lru); |
f24e9980 SW |
695 | ceph_con_close(&osd->o_con); |
696 | put_osd(osd); | |
697 | } | |
698 | ||
aca420bc SW |
699 | static void remove_all_osds(struct ceph_osd_client *osdc) |
700 | { | |
048a9d2d | 701 | dout("%s %p\n", __func__, osdc); |
aca420bc SW |
702 | mutex_lock(&osdc->request_mutex); |
703 | while (!RB_EMPTY_ROOT(&osdc->osds)) { | |
704 | struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), | |
705 | struct ceph_osd, o_node); | |
706 | __remove_osd(osdc, osd); | |
707 | } | |
708 | mutex_unlock(&osdc->request_mutex); | |
709 | } | |
710 | ||
f5a2041b YS |
711 | static void __move_osd_to_lru(struct ceph_osd_client *osdc, |
712 | struct ceph_osd *osd) | |
713 | { | |
714 | dout("__move_osd_to_lru %p\n", osd); | |
715 | BUG_ON(!list_empty(&osd->o_osd_lru)); | |
716 | list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); | |
3d14c5d2 | 717 | osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ; |
f5a2041b YS |
718 | } |
719 | ||
720 | static void __remove_osd_from_lru(struct ceph_osd *osd) | |
721 | { | |
722 | dout("__remove_osd_from_lru %p\n", osd); | |
723 | if (!list_empty(&osd->o_osd_lru)) | |
724 | list_del_init(&osd->o_osd_lru); | |
725 | } | |
726 | ||
aca420bc | 727 | static void remove_old_osds(struct ceph_osd_client *osdc) |
f5a2041b YS |
728 | { |
729 | struct ceph_osd *osd, *nosd; | |
730 | ||
731 | dout("__remove_old_osds %p\n", osdc); | |
732 | mutex_lock(&osdc->request_mutex); | |
733 | list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { | |
aca420bc | 734 | if (time_before(jiffies, osd->lru_ttl)) |
f5a2041b YS |
735 | break; |
736 | __remove_osd(osdc, osd); | |
737 | } | |
738 | mutex_unlock(&osdc->request_mutex); | |
739 | } | |
740 | ||
f24e9980 SW |
741 | /* |
742 | * reset osd connect | |
743 | */ | |
f5a2041b | 744 | static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) |
f24e9980 | 745 | { |
87b315a5 | 746 | struct ceph_osd_request *req; |
f24e9980 SW |
747 | int ret = 0; |
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); |
87b315a5 SW |
753 | } else if (memcmp(&osdc->osdmap->osd_addr[osd->o_osd], |
754 | &osd->o_con.peer_addr, | |
755 | sizeof(osd->o_con.peer_addr)) == 0 && | |
756 | !ceph_con_opened(&osd->o_con)) { | |
757 | dout(" osd addr hasn't changed and connection never opened," | |
758 | " letting msgr retry"); | |
759 | /* touch each r_stamp for handle_timeout()'s benfit */ | |
760 | list_for_each_entry(req, &osd->o_requests, r_osd_item) | |
761 | req->r_stamp = jiffies; | |
762 | ret = -EAGAIN; | |
f24e9980 SW |
763 | } else { |
764 | ceph_con_close(&osd->o_con); | |
b7a9e5dd SW |
765 | ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, |
766 | &osdc->osdmap->osd_addr[osd->o_osd]); | |
f24e9980 SW |
767 | osd->o_incarnation++; |
768 | } | |
769 | return ret; | |
770 | } | |
771 | ||
772 | static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new) | |
773 | { | |
774 | struct rb_node **p = &osdc->osds.rb_node; | |
775 | struct rb_node *parent = NULL; | |
776 | struct ceph_osd *osd = NULL; | |
777 | ||
aca420bc | 778 | dout("__insert_osd %p osd%d\n", new, new->o_osd); |
f24e9980 SW |
779 | while (*p) { |
780 | parent = *p; | |
781 | osd = rb_entry(parent, struct ceph_osd, o_node); | |
782 | if (new->o_osd < osd->o_osd) | |
783 | p = &(*p)->rb_left; | |
784 | else if (new->o_osd > osd->o_osd) | |
785 | p = &(*p)->rb_right; | |
786 | else | |
787 | BUG(); | |
788 | } | |
789 | ||
790 | rb_link_node(&new->o_node, parent, p); | |
791 | rb_insert_color(&new->o_node, &osdc->osds); | |
792 | } | |
793 | ||
794 | static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o) | |
795 | { | |
796 | struct ceph_osd *osd; | |
797 | struct rb_node *n = osdc->osds.rb_node; | |
798 | ||
799 | while (n) { | |
800 | osd = rb_entry(n, struct ceph_osd, o_node); | |
801 | if (o < osd->o_osd) | |
802 | n = n->rb_left; | |
803 | else if (o > osd->o_osd) | |
804 | n = n->rb_right; | |
805 | else | |
806 | return osd; | |
807 | } | |
808 | return NULL; | |
809 | } | |
810 | ||
422d2cb8 YS |
811 | static void __schedule_osd_timeout(struct ceph_osd_client *osdc) |
812 | { | |
813 | schedule_delayed_work(&osdc->timeout_work, | |
3d14c5d2 | 814 | osdc->client->options->osd_keepalive_timeout * HZ); |
422d2cb8 YS |
815 | } |
816 | ||
817 | static void __cancel_osd_timeout(struct ceph_osd_client *osdc) | |
818 | { | |
819 | cancel_delayed_work(&osdc->timeout_work); | |
820 | } | |
f24e9980 SW |
821 | |
822 | /* | |
823 | * Register request, assign tid. If this is the first request, set up | |
824 | * the timeout event. | |
825 | */ | |
a40c4f10 YS |
826 | static void __register_request(struct ceph_osd_client *osdc, |
827 | struct ceph_osd_request *req) | |
f24e9980 | 828 | { |
f24e9980 | 829 | req->r_tid = ++osdc->last_tid; |
6df058c0 | 830 | req->r_request->hdr.tid = cpu_to_le64(req->r_tid); |
77f38e0e | 831 | dout("__register_request %p tid %lld\n", req, req->r_tid); |
f24e9980 SW |
832 | __insert_request(osdc, req); |
833 | ceph_osdc_get_request(req); | |
834 | osdc->num_requests++; | |
f24e9980 | 835 | if (osdc->num_requests == 1) { |
422d2cb8 YS |
836 | dout(" first request, scheduling timeout\n"); |
837 | __schedule_osd_timeout(osdc); | |
f24e9980 | 838 | } |
a40c4f10 YS |
839 | } |
840 | ||
841 | static void register_request(struct ceph_osd_client *osdc, | |
842 | struct ceph_osd_request *req) | |
843 | { | |
844 | mutex_lock(&osdc->request_mutex); | |
845 | __register_request(osdc, req); | |
f24e9980 SW |
846 | mutex_unlock(&osdc->request_mutex); |
847 | } | |
848 | ||
849 | /* | |
850 | * called under osdc->request_mutex | |
851 | */ | |
852 | static void __unregister_request(struct ceph_osd_client *osdc, | |
853 | struct ceph_osd_request *req) | |
854 | { | |
35f9f8a0 SW |
855 | if (RB_EMPTY_NODE(&req->r_node)) { |
856 | dout("__unregister_request %p tid %lld not registered\n", | |
857 | req, req->r_tid); | |
858 | return; | |
859 | } | |
860 | ||
f24e9980 SW |
861 | dout("__unregister_request %p tid %lld\n", req, req->r_tid); |
862 | rb_erase(&req->r_node, &osdc->requests); | |
863 | osdc->num_requests--; | |
864 | ||
0ba6478d SW |
865 | if (req->r_osd) { |
866 | /* make sure the original request isn't in flight. */ | |
6740a845 | 867 | ceph_msg_revoke(req->r_request); |
0ba6478d SW |
868 | |
869 | list_del_init(&req->r_osd_item); | |
a40c4f10 YS |
870 | if (list_empty(&req->r_osd->o_requests) && |
871 | list_empty(&req->r_osd->o_linger_requests)) { | |
872 | dout("moving osd to %p lru\n", req->r_osd); | |
f5a2041b | 873 | __move_osd_to_lru(osdc, req->r_osd); |
a40c4f10 | 874 | } |
fbdb9190 | 875 | if (list_empty(&req->r_linger_item)) |
a40c4f10 | 876 | req->r_osd = NULL; |
0ba6478d | 877 | } |
f24e9980 SW |
878 | |
879 | ceph_osdc_put_request(req); | |
880 | ||
422d2cb8 YS |
881 | list_del_init(&req->r_req_lru_item); |
882 | if (osdc->num_requests == 0) { | |
883 | dout(" no requests, canceling timeout\n"); | |
884 | __cancel_osd_timeout(osdc); | |
f24e9980 SW |
885 | } |
886 | } | |
887 | ||
888 | /* | |
889 | * Cancel a previously queued request message | |
890 | */ | |
891 | static void __cancel_request(struct ceph_osd_request *req) | |
892 | { | |
6bc18876 | 893 | if (req->r_sent && req->r_osd) { |
6740a845 | 894 | ceph_msg_revoke(req->r_request); |
f24e9980 SW |
895 | req->r_sent = 0; |
896 | } | |
897 | } | |
898 | ||
a40c4f10 YS |
899 | static void __register_linger_request(struct ceph_osd_client *osdc, |
900 | struct ceph_osd_request *req) | |
901 | { | |
902 | dout("__register_linger_request %p\n", req); | |
903 | list_add_tail(&req->r_linger_item, &osdc->req_linger); | |
6194ea89 SW |
904 | if (req->r_osd) |
905 | list_add_tail(&req->r_linger_osd, | |
906 | &req->r_osd->o_linger_requests); | |
a40c4f10 YS |
907 | } |
908 | ||
909 | static void __unregister_linger_request(struct ceph_osd_client *osdc, | |
910 | struct ceph_osd_request *req) | |
911 | { | |
912 | dout("__unregister_linger_request %p\n", req); | |
913 | if (req->r_osd) { | |
914 | list_del_init(&req->r_linger_item); | |
915 | list_del_init(&req->r_linger_osd); | |
916 | ||
917 | if (list_empty(&req->r_osd->o_requests) && | |
918 | list_empty(&req->r_osd->o_linger_requests)) { | |
919 | dout("moving osd to %p lru\n", req->r_osd); | |
920 | __move_osd_to_lru(osdc, req->r_osd); | |
921 | } | |
fbdb9190 SW |
922 | if (list_empty(&req->r_osd_item)) |
923 | req->r_osd = NULL; | |
a40c4f10 YS |
924 | } |
925 | } | |
926 | ||
927 | void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc, | |
928 | struct ceph_osd_request *req) | |
929 | { | |
930 | mutex_lock(&osdc->request_mutex); | |
931 | if (req->r_linger) { | |
932 | __unregister_linger_request(osdc, req); | |
933 | ceph_osdc_put_request(req); | |
934 | } | |
935 | mutex_unlock(&osdc->request_mutex); | |
936 | } | |
937 | EXPORT_SYMBOL(ceph_osdc_unregister_linger_request); | |
938 | ||
939 | void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc, | |
940 | struct ceph_osd_request *req) | |
941 | { | |
942 | if (!req->r_linger) { | |
943 | dout("set_request_linger %p\n", req); | |
944 | req->r_linger = 1; | |
945 | /* | |
946 | * caller is now responsible for calling | |
947 | * unregister_linger_request | |
948 | */ | |
949 | ceph_osdc_get_request(req); | |
950 | } | |
951 | } | |
952 | EXPORT_SYMBOL(ceph_osdc_set_request_linger); | |
953 | ||
f24e9980 SW |
954 | /* |
955 | * Pick an osd (the first 'up' osd in the pg), allocate the osd struct | |
956 | * (as needed), and set the request r_osd appropriately. If there is | |
25985edc | 957 | * no up osd, set r_osd to NULL. Move the request to the appropriate list |
6f6c7006 | 958 | * (unsent, homeless) or leave on in-flight lru. |
f24e9980 SW |
959 | * |
960 | * Return 0 if unchanged, 1 if changed, or negative on error. | |
961 | * | |
962 | * Caller should hold map_sem for read and request_mutex. | |
963 | */ | |
6f6c7006 | 964 | static int __map_request(struct ceph_osd_client *osdc, |
38d6453c | 965 | struct ceph_osd_request *req, int force_resend) |
f24e9980 SW |
966 | { |
967 | struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base; | |
51042122 | 968 | struct ceph_pg pgid; |
d85b7056 SW |
969 | int acting[CEPH_PG_MAX_SIZE]; |
970 | int o = -1, num = 0; | |
f24e9980 | 971 | int err; |
f24e9980 | 972 | |
6f6c7006 | 973 | dout("map_request %p tid %lld\n", req, req->r_tid); |
f24e9980 SW |
974 | err = ceph_calc_object_layout(&reqhead->layout, req->r_oid, |
975 | &req->r_file_layout, osdc->osdmap); | |
6f6c7006 SW |
976 | if (err) { |
977 | list_move(&req->r_req_lru_item, &osdc->req_notarget); | |
f24e9980 | 978 | return err; |
6f6c7006 | 979 | } |
51042122 | 980 | pgid = reqhead->layout.ol_pgid; |
7740a42f SW |
981 | req->r_pgid = pgid; |
982 | ||
d85b7056 SW |
983 | err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting); |
984 | if (err > 0) { | |
985 | o = acting[0]; | |
986 | num = err; | |
987 | } | |
f24e9980 | 988 | |
38d6453c SW |
989 | if ((!force_resend && |
990 | req->r_osd && req->r_osd->o_osd == o && | |
d85b7056 SW |
991 | req->r_sent >= req->r_osd->o_incarnation && |
992 | req->r_num_pg_osds == num && | |
993 | memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) || | |
f24e9980 SW |
994 | (req->r_osd == NULL && o == -1)) |
995 | return 0; /* no change */ | |
996 | ||
6f6c7006 | 997 | dout("map_request tid %llu pgid %d.%x osd%d (was osd%d)\n", |
51042122 | 998 | req->r_tid, le32_to_cpu(pgid.pool), le16_to_cpu(pgid.ps), o, |
f24e9980 SW |
999 | req->r_osd ? req->r_osd->o_osd : -1); |
1000 | ||
d85b7056 SW |
1001 | /* record full pg acting set */ |
1002 | memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num); | |
1003 | req->r_num_pg_osds = num; | |
1004 | ||
f24e9980 SW |
1005 | if (req->r_osd) { |
1006 | __cancel_request(req); | |
1007 | list_del_init(&req->r_osd_item); | |
f24e9980 SW |
1008 | req->r_osd = NULL; |
1009 | } | |
1010 | ||
1011 | req->r_osd = __lookup_osd(osdc, o); | |
1012 | if (!req->r_osd && o >= 0) { | |
c99eb1c7 | 1013 | err = -ENOMEM; |
e10006f8 | 1014 | req->r_osd = create_osd(osdc, o); |
6f6c7006 SW |
1015 | if (!req->r_osd) { |
1016 | list_move(&req->r_req_lru_item, &osdc->req_notarget); | |
c99eb1c7 | 1017 | goto out; |
6f6c7006 | 1018 | } |
f24e9980 | 1019 | |
6f6c7006 | 1020 | dout("map_request osd %p is osd%d\n", req->r_osd, o); |
f24e9980 SW |
1021 | __insert_osd(osdc, req->r_osd); |
1022 | ||
b7a9e5dd SW |
1023 | ceph_con_open(&req->r_osd->o_con, |
1024 | CEPH_ENTITY_TYPE_OSD, o, | |
1025 | &osdc->osdmap->osd_addr[o]); | |
f24e9980 SW |
1026 | } |
1027 | ||
f5a2041b YS |
1028 | if (req->r_osd) { |
1029 | __remove_osd_from_lru(req->r_osd); | |
f24e9980 | 1030 | list_add(&req->r_osd_item, &req->r_osd->o_requests); |
6f6c7006 SW |
1031 | list_move(&req->r_req_lru_item, &osdc->req_unsent); |
1032 | } else { | |
1033 | list_move(&req->r_req_lru_item, &osdc->req_notarget); | |
f5a2041b | 1034 | } |
d85b7056 | 1035 | err = 1; /* osd or pg changed */ |
f24e9980 SW |
1036 | |
1037 | out: | |
f24e9980 SW |
1038 | return err; |
1039 | } | |
1040 | ||
1041 | /* | |
1042 | * caller should hold map_sem (for read) and request_mutex | |
1043 | */ | |
56e925b6 SW |
1044 | static void __send_request(struct ceph_osd_client *osdc, |
1045 | struct ceph_osd_request *req) | |
f24e9980 SW |
1046 | { |
1047 | struct ceph_osd_request_head *reqhead; | |
f24e9980 SW |
1048 | |
1049 | dout("send_request %p tid %llu to osd%d flags %d\n", | |
1050 | req, req->r_tid, req->r_osd->o_osd, req->r_flags); | |
1051 | ||
1052 | reqhead = req->r_request->front.iov_base; | |
1053 | reqhead->osdmap_epoch = cpu_to_le32(osdc->osdmap->epoch); | |
1054 | reqhead->flags |= cpu_to_le32(req->r_flags); /* e.g., RETRY */ | |
1055 | reqhead->reassert_version = req->r_reassert_version; | |
1056 | ||
3dd72fc0 | 1057 | req->r_stamp = jiffies; |
07a27e22 | 1058 | list_move_tail(&req->r_req_lru_item, &osdc->req_lru); |
f24e9980 SW |
1059 | |
1060 | ceph_msg_get(req->r_request); /* send consumes a ref */ | |
1061 | ceph_con_send(&req->r_osd->o_con, req->r_request); | |
1062 | req->r_sent = req->r_osd->o_incarnation; | |
f24e9980 SW |
1063 | } |
1064 | ||
6f6c7006 SW |
1065 | /* |
1066 | * Send any requests in the queue (req_unsent). | |
1067 | */ | |
1068 | static void send_queued(struct ceph_osd_client *osdc) | |
1069 | { | |
1070 | struct ceph_osd_request *req, *tmp; | |
1071 | ||
1072 | dout("send_queued\n"); | |
1073 | mutex_lock(&osdc->request_mutex); | |
1074 | list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item) { | |
1075 | __send_request(osdc, req); | |
1076 | } | |
1077 | mutex_unlock(&osdc->request_mutex); | |
1078 | } | |
1079 | ||
f24e9980 SW |
1080 | /* |
1081 | * Timeout callback, called every N seconds when 1 or more osd | |
1082 | * requests has been active for more than N seconds. When this | |
1083 | * happens, we ping all OSDs with requests who have timed out to | |
1084 | * ensure any communications channel reset is detected. Reset the | |
1085 | * request timeouts another N seconds in the future as we go. | |
1086 | * Reschedule the timeout event another N seconds in future (unless | |
1087 | * there are no open requests). | |
1088 | */ | |
1089 | static void handle_timeout(struct work_struct *work) | |
1090 | { | |
1091 | struct ceph_osd_client *osdc = | |
1092 | container_of(work, struct ceph_osd_client, timeout_work.work); | |
422d2cb8 | 1093 | struct ceph_osd_request *req, *last_req = NULL; |
f24e9980 | 1094 | struct ceph_osd *osd; |
3d14c5d2 | 1095 | unsigned long timeout = osdc->client->options->osd_timeout * HZ; |
422d2cb8 | 1096 | unsigned long keepalive = |
3d14c5d2 | 1097 | osdc->client->options->osd_keepalive_timeout * HZ; |
3dd72fc0 | 1098 | unsigned long last_stamp = 0; |
422d2cb8 | 1099 | struct list_head slow_osds; |
f24e9980 SW |
1100 | dout("timeout\n"); |
1101 | down_read(&osdc->map_sem); | |
1102 | ||
1103 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1104 | ||
1105 | mutex_lock(&osdc->request_mutex); | |
f24e9980 | 1106 | |
422d2cb8 YS |
1107 | /* |
1108 | * reset osds that appear to be _really_ unresponsive. this | |
1109 | * is a failsafe measure.. we really shouldn't be getting to | |
1110 | * this point if the system is working properly. the monitors | |
1111 | * should mark the osd as failed and we should find out about | |
1112 | * it from an updated osd map. | |
1113 | */ | |
f26e681d | 1114 | while (timeout && !list_empty(&osdc->req_lru)) { |
422d2cb8 YS |
1115 | req = list_entry(osdc->req_lru.next, struct ceph_osd_request, |
1116 | r_req_lru_item); | |
1117 | ||
4cf9d544 | 1118 | /* hasn't been long enough since we sent it? */ |
3dd72fc0 | 1119 | if (time_before(jiffies, req->r_stamp + timeout)) |
422d2cb8 | 1120 | break; |
4cf9d544 SW |
1121 | |
1122 | /* hasn't been long enough since it was acked? */ | |
1123 | if (req->r_request->ack_stamp == 0 || | |
1124 | time_before(jiffies, req->r_request->ack_stamp + timeout)) | |
1125 | break; | |
422d2cb8 | 1126 | |
3dd72fc0 | 1127 | BUG_ON(req == last_req && req->r_stamp == last_stamp); |
422d2cb8 | 1128 | last_req = req; |
3dd72fc0 | 1129 | last_stamp = req->r_stamp; |
422d2cb8 YS |
1130 | |
1131 | osd = req->r_osd; | |
1132 | BUG_ON(!osd); | |
1133 | pr_warning(" tid %llu timed out on osd%d, will reset osd\n", | |
1134 | req->r_tid, osd->o_osd); | |
6f6c7006 | 1135 | __kick_osd_requests(osdc, osd); |
422d2cb8 YS |
1136 | } |
1137 | ||
1138 | /* | |
1139 | * ping osds that are a bit slow. this ensures that if there | |
1140 | * is a break in the TCP connection we will notice, and reopen | |
1141 | * a connection with that osd (from the fault callback). | |
1142 | */ | |
1143 | INIT_LIST_HEAD(&slow_osds); | |
1144 | list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) { | |
3dd72fc0 | 1145 | if (time_before(jiffies, req->r_stamp + keepalive)) |
422d2cb8 YS |
1146 | break; |
1147 | ||
1148 | osd = req->r_osd; | |
1149 | BUG_ON(!osd); | |
1150 | dout(" tid %llu is slow, will send keepalive on osd%d\n", | |
f24e9980 | 1151 | req->r_tid, osd->o_osd); |
422d2cb8 YS |
1152 | list_move_tail(&osd->o_keepalive_item, &slow_osds); |
1153 | } | |
1154 | while (!list_empty(&slow_osds)) { | |
1155 | osd = list_entry(slow_osds.next, struct ceph_osd, | |
1156 | o_keepalive_item); | |
1157 | list_del_init(&osd->o_keepalive_item); | |
f24e9980 SW |
1158 | ceph_con_keepalive(&osd->o_con); |
1159 | } | |
1160 | ||
422d2cb8 | 1161 | __schedule_osd_timeout(osdc); |
f24e9980 | 1162 | mutex_unlock(&osdc->request_mutex); |
6f6c7006 | 1163 | send_queued(osdc); |
f24e9980 SW |
1164 | up_read(&osdc->map_sem); |
1165 | } | |
1166 | ||
f5a2041b YS |
1167 | static void handle_osds_timeout(struct work_struct *work) |
1168 | { | |
1169 | struct ceph_osd_client *osdc = | |
1170 | container_of(work, struct ceph_osd_client, | |
1171 | osds_timeout_work.work); | |
1172 | unsigned long delay = | |
3d14c5d2 | 1173 | osdc->client->options->osd_idle_ttl * HZ >> 2; |
f5a2041b YS |
1174 | |
1175 | dout("osds timeout\n"); | |
1176 | down_read(&osdc->map_sem); | |
aca420bc | 1177 | remove_old_osds(osdc); |
f5a2041b YS |
1178 | up_read(&osdc->map_sem); |
1179 | ||
1180 | schedule_delayed_work(&osdc->osds_timeout_work, | |
1181 | round_jiffies_relative(delay)); | |
1182 | } | |
1183 | ||
25845472 SW |
1184 | static void complete_request(struct ceph_osd_request *req) |
1185 | { | |
1186 | if (req->r_safe_callback) | |
1187 | req->r_safe_callback(req, NULL); | |
1188 | complete_all(&req->r_safe_completion); /* fsync waiter */ | |
1189 | } | |
1190 | ||
f24e9980 SW |
1191 | /* |
1192 | * handle osd op reply. either call the callback if it is specified, | |
1193 | * or do the completion to wake up the waiting thread. | |
1194 | */ | |
350b1c32 SW |
1195 | static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg, |
1196 | struct ceph_connection *con) | |
f24e9980 SW |
1197 | { |
1198 | struct ceph_osd_reply_head *rhead = msg->front.iov_base; | |
1199 | struct ceph_osd_request *req; | |
1200 | u64 tid; | |
1201 | int numops, object_len, flags; | |
0ceed5db | 1202 | s32 result; |
f24e9980 | 1203 | |
6df058c0 | 1204 | tid = le64_to_cpu(msg->hdr.tid); |
f24e9980 SW |
1205 | if (msg->front.iov_len < sizeof(*rhead)) |
1206 | goto bad; | |
f24e9980 SW |
1207 | numops = le32_to_cpu(rhead->num_ops); |
1208 | object_len = le32_to_cpu(rhead->object_len); | |
0ceed5db | 1209 | result = le32_to_cpu(rhead->result); |
f24e9980 SW |
1210 | if (msg->front.iov_len != sizeof(*rhead) + object_len + |
1211 | numops * sizeof(struct ceph_osd_op)) | |
1212 | goto bad; | |
0ceed5db | 1213 | dout("handle_reply %p tid %llu result %d\n", msg, tid, (int)result); |
f24e9980 SW |
1214 | /* lookup */ |
1215 | mutex_lock(&osdc->request_mutex); | |
1216 | req = __lookup_request(osdc, tid); | |
1217 | if (req == NULL) { | |
1218 | dout("handle_reply tid %llu dne\n", tid); | |
1219 | mutex_unlock(&osdc->request_mutex); | |
1220 | return; | |
1221 | } | |
1222 | ceph_osdc_get_request(req); | |
1223 | flags = le32_to_cpu(rhead->flags); | |
1224 | ||
350b1c32 | 1225 | /* |
0d59ab81 | 1226 | * if this connection filled our message, drop our reference now, to |
350b1c32 SW |
1227 | * avoid a (safe but slower) revoke later. |
1228 | */ | |
0d59ab81 | 1229 | if (req->r_con_filling_msg == con && req->r_reply == msg) { |
c16e7869 | 1230 | dout(" dropping con_filling_msg ref %p\n", con); |
0d59ab81 | 1231 | req->r_con_filling_msg = NULL; |
0d47766f | 1232 | con->ops->put(con); |
350b1c32 SW |
1233 | } |
1234 | ||
f24e9980 | 1235 | if (!req->r_got_reply) { |
95c96174 | 1236 | unsigned int bytes; |
f24e9980 SW |
1237 | |
1238 | req->r_result = le32_to_cpu(rhead->result); | |
1239 | bytes = le32_to_cpu(msg->hdr.data_len); | |
1240 | dout("handle_reply result %d bytes %d\n", req->r_result, | |
1241 | bytes); | |
1242 | if (req->r_result == 0) | |
1243 | req->r_result = bytes; | |
1244 | ||
1245 | /* in case this is a write and we need to replay, */ | |
1246 | req->r_reassert_version = rhead->reassert_version; | |
1247 | ||
1248 | req->r_got_reply = 1; | |
1249 | } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) { | |
1250 | dout("handle_reply tid %llu dup ack\n", tid); | |
34b43a56 | 1251 | mutex_unlock(&osdc->request_mutex); |
f24e9980 SW |
1252 | goto done; |
1253 | } | |
1254 | ||
1255 | dout("handle_reply tid %llu flags %d\n", tid, flags); | |
1256 | ||
a40c4f10 YS |
1257 | if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK)) |
1258 | __register_linger_request(osdc, req); | |
1259 | ||
f24e9980 | 1260 | /* either this is a read, or we got the safe response */ |
0ceed5db SW |
1261 | if (result < 0 || |
1262 | (flags & CEPH_OSD_FLAG_ONDISK) || | |
f24e9980 SW |
1263 | ((flags & CEPH_OSD_FLAG_WRITE) == 0)) |
1264 | __unregister_request(osdc, req); | |
1265 | ||
1266 | mutex_unlock(&osdc->request_mutex); | |
1267 | ||
1268 | if (req->r_callback) | |
1269 | req->r_callback(req, msg); | |
1270 | else | |
03066f23 | 1271 | complete_all(&req->r_completion); |
f24e9980 | 1272 | |
25845472 SW |
1273 | if (flags & CEPH_OSD_FLAG_ONDISK) |
1274 | complete_request(req); | |
f24e9980 SW |
1275 | |
1276 | done: | |
a40c4f10 | 1277 | dout("req=%p req->r_linger=%d\n", req, req->r_linger); |
f24e9980 SW |
1278 | ceph_osdc_put_request(req); |
1279 | return; | |
1280 | ||
1281 | bad: | |
1282 | pr_err("corrupt osd_op_reply got %d %d expected %d\n", | |
1283 | (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len), | |
1284 | (int)sizeof(*rhead)); | |
9ec7cab1 | 1285 | ceph_msg_dump(msg); |
f24e9980 SW |
1286 | } |
1287 | ||
6f6c7006 | 1288 | static void reset_changed_osds(struct ceph_osd_client *osdc) |
f24e9980 | 1289 | { |
f24e9980 | 1290 | struct rb_node *p, *n; |
f24e9980 | 1291 | |
6f6c7006 SW |
1292 | for (p = rb_first(&osdc->osds); p; p = n) { |
1293 | struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node); | |
f24e9980 | 1294 | |
6f6c7006 SW |
1295 | n = rb_next(p); |
1296 | if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || | |
1297 | memcmp(&osd->o_con.peer_addr, | |
1298 | ceph_osd_addr(osdc->osdmap, | |
1299 | osd->o_osd), | |
1300 | sizeof(struct ceph_entity_addr)) != 0) | |
1301 | __reset_osd(osdc, osd); | |
f24e9980 | 1302 | } |
422d2cb8 YS |
1303 | } |
1304 | ||
1305 | /* | |
6f6c7006 SW |
1306 | * Requeue requests whose mapping to an OSD has changed. If requests map to |
1307 | * no osd, request a new map. | |
422d2cb8 YS |
1308 | * |
1309 | * Caller should hold map_sem for read and request_mutex. | |
1310 | */ | |
38d6453c | 1311 | static void kick_requests(struct ceph_osd_client *osdc, int force_resend) |
422d2cb8 | 1312 | { |
a40c4f10 | 1313 | struct ceph_osd_request *req, *nreq; |
6f6c7006 SW |
1314 | struct rb_node *p; |
1315 | int needmap = 0; | |
1316 | int err; | |
422d2cb8 | 1317 | |
38d6453c | 1318 | dout("kick_requests %s\n", force_resend ? " (force resend)" : ""); |
422d2cb8 | 1319 | mutex_lock(&osdc->request_mutex); |
6194ea89 | 1320 | for (p = rb_first(&osdc->requests); p; ) { |
6f6c7006 | 1321 | req = rb_entry(p, struct ceph_osd_request, r_node); |
6194ea89 | 1322 | p = rb_next(p); |
38d6453c | 1323 | err = __map_request(osdc, req, force_resend); |
6f6c7006 SW |
1324 | if (err < 0) |
1325 | continue; /* error */ | |
1326 | if (req->r_osd == NULL) { | |
1327 | dout("%p tid %llu maps to no osd\n", req, req->r_tid); | |
1328 | needmap++; /* request a newer map */ | |
1329 | } else if (err > 0) { | |
6194ea89 SW |
1330 | if (!req->r_linger) { |
1331 | dout("%p tid %llu requeued on osd%d\n", req, | |
1332 | req->r_tid, | |
1333 | req->r_osd ? req->r_osd->o_osd : -1); | |
a40c4f10 | 1334 | req->r_flags |= CEPH_OSD_FLAG_RETRY; |
6194ea89 SW |
1335 | } |
1336 | } | |
1337 | if (req->r_linger && list_empty(&req->r_linger_item)) { | |
1338 | /* | |
1339 | * register as a linger so that we will | |
1340 | * re-submit below and get a new tid | |
1341 | */ | |
1342 | dout("%p tid %llu restart on osd%d\n", | |
1343 | req, req->r_tid, | |
1344 | req->r_osd ? req->r_osd->o_osd : -1); | |
1345 | __register_linger_request(osdc, req); | |
1346 | __unregister_request(osdc, req); | |
a40c4f10 YS |
1347 | } |
1348 | } | |
1349 | ||
1350 | list_for_each_entry_safe(req, nreq, &osdc->req_linger, | |
1351 | r_linger_item) { | |
1352 | dout("linger req=%p req->r_osd=%p\n", req, req->r_osd); | |
1353 | ||
38d6453c | 1354 | err = __map_request(osdc, req, force_resend); |
a40c4f10 YS |
1355 | if (err == 0) |
1356 | continue; /* no change and no osd was specified */ | |
1357 | if (err < 0) | |
1358 | continue; /* hrm! */ | |
1359 | if (req->r_osd == NULL) { | |
1360 | dout("tid %llu maps to no valid osd\n", req->r_tid); | |
1361 | needmap++; /* request a newer map */ | |
1362 | continue; | |
6f6c7006 | 1363 | } |
a40c4f10 YS |
1364 | |
1365 | dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid, | |
1366 | req->r_osd ? req->r_osd->o_osd : -1); | |
1367 | __unregister_linger_request(osdc, req); | |
1368 | __register_request(osdc, req); | |
6f6c7006 | 1369 | } |
f24e9980 SW |
1370 | mutex_unlock(&osdc->request_mutex); |
1371 | ||
1372 | if (needmap) { | |
1373 | dout("%d requests for down osds, need new map\n", needmap); | |
1374 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1375 | } | |
422d2cb8 | 1376 | } |
6f6c7006 SW |
1377 | |
1378 | ||
f24e9980 SW |
1379 | /* |
1380 | * Process updated osd map. | |
1381 | * | |
1382 | * The message contains any number of incremental and full maps, normally | |
1383 | * indicating some sort of topology change in the cluster. Kick requests | |
1384 | * off to different OSDs as needed. | |
1385 | */ | |
1386 | void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) | |
1387 | { | |
1388 | void *p, *end, *next; | |
1389 | u32 nr_maps, maplen; | |
1390 | u32 epoch; | |
1391 | struct ceph_osdmap *newmap = NULL, *oldmap; | |
1392 | int err; | |
1393 | struct ceph_fsid fsid; | |
1394 | ||
1395 | dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0); | |
1396 | p = msg->front.iov_base; | |
1397 | end = p + msg->front.iov_len; | |
1398 | ||
1399 | /* verify fsid */ | |
1400 | ceph_decode_need(&p, end, sizeof(fsid), bad); | |
1401 | ceph_decode_copy(&p, &fsid, sizeof(fsid)); | |
0743304d SW |
1402 | if (ceph_check_fsid(osdc->client, &fsid) < 0) |
1403 | return; | |
f24e9980 SW |
1404 | |
1405 | down_write(&osdc->map_sem); | |
1406 | ||
1407 | /* incremental maps */ | |
1408 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
1409 | dout(" %d inc maps\n", nr_maps); | |
1410 | while (nr_maps > 0) { | |
1411 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
1412 | epoch = ceph_decode_32(&p); |
1413 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
1414 | ceph_decode_need(&p, end, maplen, bad); |
1415 | next = p + maplen; | |
1416 | if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) { | |
1417 | dout("applying incremental map %u len %d\n", | |
1418 | epoch, maplen); | |
1419 | newmap = osdmap_apply_incremental(&p, next, | |
1420 | osdc->osdmap, | |
15d9882c | 1421 | &osdc->client->msgr); |
f24e9980 SW |
1422 | if (IS_ERR(newmap)) { |
1423 | err = PTR_ERR(newmap); | |
1424 | goto bad; | |
1425 | } | |
30dc6381 | 1426 | BUG_ON(!newmap); |
f24e9980 SW |
1427 | if (newmap != osdc->osdmap) { |
1428 | ceph_osdmap_destroy(osdc->osdmap); | |
1429 | osdc->osdmap = newmap; | |
1430 | } | |
38d6453c | 1431 | kick_requests(osdc, 0); |
6f6c7006 | 1432 | reset_changed_osds(osdc); |
f24e9980 SW |
1433 | } else { |
1434 | dout("ignoring incremental map %u len %d\n", | |
1435 | epoch, maplen); | |
1436 | } | |
1437 | p = next; | |
1438 | nr_maps--; | |
1439 | } | |
1440 | if (newmap) | |
1441 | goto done; | |
1442 | ||
1443 | /* full maps */ | |
1444 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
1445 | dout(" %d full maps\n", nr_maps); | |
1446 | while (nr_maps) { | |
1447 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
1448 | epoch = ceph_decode_32(&p); |
1449 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
1450 | ceph_decode_need(&p, end, maplen, bad); |
1451 | if (nr_maps > 1) { | |
1452 | dout("skipping non-latest full map %u len %d\n", | |
1453 | epoch, maplen); | |
1454 | } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) { | |
1455 | dout("skipping full map %u len %d, " | |
1456 | "older than our %u\n", epoch, maplen, | |
1457 | osdc->osdmap->epoch); | |
1458 | } else { | |
38d6453c SW |
1459 | int skipped_map = 0; |
1460 | ||
f24e9980 SW |
1461 | dout("taking full map %u len %d\n", epoch, maplen); |
1462 | newmap = osdmap_decode(&p, p+maplen); | |
1463 | if (IS_ERR(newmap)) { | |
1464 | err = PTR_ERR(newmap); | |
1465 | goto bad; | |
1466 | } | |
30dc6381 | 1467 | BUG_ON(!newmap); |
f24e9980 SW |
1468 | oldmap = osdc->osdmap; |
1469 | osdc->osdmap = newmap; | |
38d6453c SW |
1470 | if (oldmap) { |
1471 | if (oldmap->epoch + 1 < newmap->epoch) | |
1472 | skipped_map = 1; | |
f24e9980 | 1473 | ceph_osdmap_destroy(oldmap); |
38d6453c SW |
1474 | } |
1475 | kick_requests(osdc, skipped_map); | |
f24e9980 SW |
1476 | } |
1477 | p += maplen; | |
1478 | nr_maps--; | |
1479 | } | |
1480 | ||
1481 | done: | |
1482 | downgrade_write(&osdc->map_sem); | |
1483 | ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch); | |
cd634fb6 SW |
1484 | |
1485 | /* | |
1486 | * subscribe to subsequent osdmap updates if full to ensure | |
1487 | * we find out when we are no longer full and stop returning | |
1488 | * ENOSPC. | |
1489 | */ | |
1490 | if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL)) | |
1491 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1492 | ||
6f6c7006 | 1493 | send_queued(osdc); |
f24e9980 | 1494 | up_read(&osdc->map_sem); |
03066f23 | 1495 | wake_up_all(&osdc->client->auth_wq); |
f24e9980 SW |
1496 | return; |
1497 | ||
1498 | bad: | |
1499 | pr_err("osdc handle_map corrupt msg\n"); | |
9ec7cab1 | 1500 | ceph_msg_dump(msg); |
f24e9980 SW |
1501 | up_write(&osdc->map_sem); |
1502 | return; | |
1503 | } | |
1504 | ||
a40c4f10 YS |
1505 | /* |
1506 | * watch/notify callback event infrastructure | |
1507 | * | |
1508 | * These callbacks are used both for watch and notify operations. | |
1509 | */ | |
1510 | static void __release_event(struct kref *kref) | |
1511 | { | |
1512 | struct ceph_osd_event *event = | |
1513 | container_of(kref, struct ceph_osd_event, kref); | |
1514 | ||
1515 | dout("__release_event %p\n", event); | |
1516 | kfree(event); | |
1517 | } | |
1518 | ||
1519 | static void get_event(struct ceph_osd_event *event) | |
1520 | { | |
1521 | kref_get(&event->kref); | |
1522 | } | |
1523 | ||
1524 | void ceph_osdc_put_event(struct ceph_osd_event *event) | |
1525 | { | |
1526 | kref_put(&event->kref, __release_event); | |
1527 | } | |
1528 | EXPORT_SYMBOL(ceph_osdc_put_event); | |
1529 | ||
1530 | static void __insert_event(struct ceph_osd_client *osdc, | |
1531 | struct ceph_osd_event *new) | |
1532 | { | |
1533 | struct rb_node **p = &osdc->event_tree.rb_node; | |
1534 | struct rb_node *parent = NULL; | |
1535 | struct ceph_osd_event *event = NULL; | |
1536 | ||
1537 | while (*p) { | |
1538 | parent = *p; | |
1539 | event = rb_entry(parent, struct ceph_osd_event, node); | |
1540 | if (new->cookie < event->cookie) | |
1541 | p = &(*p)->rb_left; | |
1542 | else if (new->cookie > event->cookie) | |
1543 | p = &(*p)->rb_right; | |
1544 | else | |
1545 | BUG(); | |
1546 | } | |
1547 | ||
1548 | rb_link_node(&new->node, parent, p); | |
1549 | rb_insert_color(&new->node, &osdc->event_tree); | |
1550 | } | |
1551 | ||
1552 | static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc, | |
1553 | u64 cookie) | |
1554 | { | |
1555 | struct rb_node **p = &osdc->event_tree.rb_node; | |
1556 | struct rb_node *parent = NULL; | |
1557 | struct ceph_osd_event *event = NULL; | |
1558 | ||
1559 | while (*p) { | |
1560 | parent = *p; | |
1561 | event = rb_entry(parent, struct ceph_osd_event, node); | |
1562 | if (cookie < event->cookie) | |
1563 | p = &(*p)->rb_left; | |
1564 | else if (cookie > event->cookie) | |
1565 | p = &(*p)->rb_right; | |
1566 | else | |
1567 | return event; | |
1568 | } | |
1569 | return NULL; | |
1570 | } | |
1571 | ||
1572 | static void __remove_event(struct ceph_osd_event *event) | |
1573 | { | |
1574 | struct ceph_osd_client *osdc = event->osdc; | |
1575 | ||
1576 | if (!RB_EMPTY_NODE(&event->node)) { | |
1577 | dout("__remove_event removed %p\n", event); | |
1578 | rb_erase(&event->node, &osdc->event_tree); | |
1579 | ceph_osdc_put_event(event); | |
1580 | } else { | |
1581 | dout("__remove_event didn't remove %p\n", event); | |
1582 | } | |
1583 | } | |
1584 | ||
1585 | int ceph_osdc_create_event(struct ceph_osd_client *osdc, | |
1586 | void (*event_cb)(u64, u64, u8, void *), | |
1587 | int one_shot, void *data, | |
1588 | struct ceph_osd_event **pevent) | |
1589 | { | |
1590 | struct ceph_osd_event *event; | |
1591 | ||
1592 | event = kmalloc(sizeof(*event), GFP_NOIO); | |
1593 | if (!event) | |
1594 | return -ENOMEM; | |
1595 | ||
1596 | dout("create_event %p\n", event); | |
1597 | event->cb = event_cb; | |
1598 | event->one_shot = one_shot; | |
1599 | event->data = data; | |
1600 | event->osdc = osdc; | |
1601 | INIT_LIST_HEAD(&event->osd_node); | |
1602 | kref_init(&event->kref); /* one ref for us */ | |
1603 | kref_get(&event->kref); /* one ref for the caller */ | |
1604 | init_completion(&event->completion); | |
1605 | ||
1606 | spin_lock(&osdc->event_lock); | |
1607 | event->cookie = ++osdc->event_count; | |
1608 | __insert_event(osdc, event); | |
1609 | spin_unlock(&osdc->event_lock); | |
1610 | ||
1611 | *pevent = event; | |
1612 | return 0; | |
1613 | } | |
1614 | EXPORT_SYMBOL(ceph_osdc_create_event); | |
1615 | ||
1616 | void ceph_osdc_cancel_event(struct ceph_osd_event *event) | |
1617 | { | |
1618 | struct ceph_osd_client *osdc = event->osdc; | |
1619 | ||
1620 | dout("cancel_event %p\n", event); | |
1621 | spin_lock(&osdc->event_lock); | |
1622 | __remove_event(event); | |
1623 | spin_unlock(&osdc->event_lock); | |
1624 | ceph_osdc_put_event(event); /* caller's */ | |
1625 | } | |
1626 | EXPORT_SYMBOL(ceph_osdc_cancel_event); | |
1627 | ||
1628 | ||
1629 | static void do_event_work(struct work_struct *work) | |
1630 | { | |
1631 | struct ceph_osd_event_work *event_work = | |
1632 | container_of(work, struct ceph_osd_event_work, work); | |
1633 | struct ceph_osd_event *event = event_work->event; | |
1634 | u64 ver = event_work->ver; | |
1635 | u64 notify_id = event_work->notify_id; | |
1636 | u8 opcode = event_work->opcode; | |
1637 | ||
1638 | dout("do_event_work completing %p\n", event); | |
1639 | event->cb(ver, notify_id, opcode, event->data); | |
1640 | complete(&event->completion); | |
1641 | dout("do_event_work completed %p\n", event); | |
1642 | ceph_osdc_put_event(event); | |
1643 | kfree(event_work); | |
1644 | } | |
1645 | ||
1646 | ||
1647 | /* | |
1648 | * Process osd watch notifications | |
1649 | */ | |
1650 | void handle_watch_notify(struct ceph_osd_client *osdc, struct ceph_msg *msg) | |
1651 | { | |
1652 | void *p, *end; | |
1653 | u8 proto_ver; | |
1654 | u64 cookie, ver, notify_id; | |
1655 | u8 opcode; | |
1656 | struct ceph_osd_event *event; | |
1657 | struct ceph_osd_event_work *event_work; | |
1658 | ||
1659 | p = msg->front.iov_base; | |
1660 | end = p + msg->front.iov_len; | |
1661 | ||
1662 | ceph_decode_8_safe(&p, end, proto_ver, bad); | |
1663 | ceph_decode_8_safe(&p, end, opcode, bad); | |
1664 | ceph_decode_64_safe(&p, end, cookie, bad); | |
1665 | ceph_decode_64_safe(&p, end, ver, bad); | |
1666 | ceph_decode_64_safe(&p, end, notify_id, bad); | |
1667 | ||
1668 | spin_lock(&osdc->event_lock); | |
1669 | event = __find_event(osdc, cookie); | |
1670 | if (event) { | |
1671 | get_event(event); | |
1672 | if (event->one_shot) | |
1673 | __remove_event(event); | |
1674 | } | |
1675 | spin_unlock(&osdc->event_lock); | |
1676 | dout("handle_watch_notify cookie %lld ver %lld event %p\n", | |
1677 | cookie, ver, event); | |
1678 | if (event) { | |
1679 | event_work = kmalloc(sizeof(*event_work), GFP_NOIO); | |
a40c4f10 YS |
1680 | if (!event_work) { |
1681 | dout("ERROR: could not allocate event_work\n"); | |
1682 | goto done_err; | |
1683 | } | |
6b0ae409 | 1684 | INIT_WORK(&event_work->work, do_event_work); |
a40c4f10 YS |
1685 | event_work->event = event; |
1686 | event_work->ver = ver; | |
1687 | event_work->notify_id = notify_id; | |
1688 | event_work->opcode = opcode; | |
1689 | if (!queue_work(osdc->notify_wq, &event_work->work)) { | |
1690 | dout("WARNING: failed to queue notify event work\n"); | |
1691 | goto done_err; | |
1692 | } | |
1693 | } | |
1694 | ||
1695 | return; | |
1696 | ||
1697 | done_err: | |
1698 | complete(&event->completion); | |
1699 | ceph_osdc_put_event(event); | |
1700 | return; | |
1701 | ||
1702 | bad: | |
1703 | pr_err("osdc handle_watch_notify corrupt msg\n"); | |
1704 | return; | |
1705 | } | |
1706 | ||
1707 | int ceph_osdc_wait_event(struct ceph_osd_event *event, unsigned long timeout) | |
1708 | { | |
1709 | int err; | |
1710 | ||
1711 | dout("wait_event %p\n", event); | |
1712 | err = wait_for_completion_interruptible_timeout(&event->completion, | |
1713 | timeout * HZ); | |
1714 | ceph_osdc_put_event(event); | |
1715 | if (err > 0) | |
1716 | err = 0; | |
1717 | dout("wait_event %p returns %d\n", event, err); | |
1718 | return err; | |
1719 | } | |
1720 | EXPORT_SYMBOL(ceph_osdc_wait_event); | |
1721 | ||
f24e9980 SW |
1722 | /* |
1723 | * Register request, send initial attempt. | |
1724 | */ | |
1725 | int ceph_osdc_start_request(struct ceph_osd_client *osdc, | |
1726 | struct ceph_osd_request *req, | |
1727 | bool nofail) | |
1728 | { | |
c1ea8823 | 1729 | int rc = 0; |
f24e9980 SW |
1730 | |
1731 | req->r_request->pages = req->r_pages; | |
1732 | req->r_request->nr_pages = req->r_num_pages; | |
68b4476b YS |
1733 | #ifdef CONFIG_BLOCK |
1734 | req->r_request->bio = req->r_bio; | |
1735 | #endif | |
1736 | req->r_request->trail = req->r_trail; | |
f24e9980 SW |
1737 | |
1738 | register_request(osdc, req); | |
1739 | ||
1740 | down_read(&osdc->map_sem); | |
1741 | mutex_lock(&osdc->request_mutex); | |
c1ea8823 SW |
1742 | /* |
1743 | * a racing kick_requests() may have sent the message for us | |
1744 | * while we dropped request_mutex above, so only send now if | |
1745 | * the request still han't been touched yet. | |
1746 | */ | |
1747 | if (req->r_sent == 0) { | |
38d6453c | 1748 | rc = __map_request(osdc, req, 0); |
9d6fcb08 SW |
1749 | if (rc < 0) { |
1750 | if (nofail) { | |
1751 | dout("osdc_start_request failed map, " | |
1752 | " will retry %lld\n", req->r_tid); | |
1753 | rc = 0; | |
1754 | } | |
234af26f | 1755 | goto out_unlock; |
9d6fcb08 | 1756 | } |
6f6c7006 SW |
1757 | if (req->r_osd == NULL) { |
1758 | dout("send_request %p no up osds in pg\n", req); | |
1759 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1760 | } else { | |
56e925b6 | 1761 | __send_request(osdc, req); |
f24e9980 | 1762 | } |
56e925b6 | 1763 | rc = 0; |
f24e9980 | 1764 | } |
234af26f DC |
1765 | |
1766 | out_unlock: | |
f24e9980 SW |
1767 | mutex_unlock(&osdc->request_mutex); |
1768 | up_read(&osdc->map_sem); | |
1769 | return rc; | |
1770 | } | |
3d14c5d2 | 1771 | EXPORT_SYMBOL(ceph_osdc_start_request); |
f24e9980 SW |
1772 | |
1773 | /* | |
1774 | * wait for a request to complete | |
1775 | */ | |
1776 | int ceph_osdc_wait_request(struct ceph_osd_client *osdc, | |
1777 | struct ceph_osd_request *req) | |
1778 | { | |
1779 | int rc; | |
1780 | ||
1781 | rc = wait_for_completion_interruptible(&req->r_completion); | |
1782 | if (rc < 0) { | |
1783 | mutex_lock(&osdc->request_mutex); | |
1784 | __cancel_request(req); | |
529cfcc4 | 1785 | __unregister_request(osdc, req); |
f24e9980 | 1786 | mutex_unlock(&osdc->request_mutex); |
25845472 | 1787 | complete_request(req); |
529cfcc4 | 1788 | dout("wait_request tid %llu canceled/timed out\n", req->r_tid); |
f24e9980 SW |
1789 | return rc; |
1790 | } | |
1791 | ||
1792 | dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result); | |
1793 | return req->r_result; | |
1794 | } | |
3d14c5d2 | 1795 | EXPORT_SYMBOL(ceph_osdc_wait_request); |
f24e9980 SW |
1796 | |
1797 | /* | |
1798 | * sync - wait for all in-flight requests to flush. avoid starvation. | |
1799 | */ | |
1800 | void ceph_osdc_sync(struct ceph_osd_client *osdc) | |
1801 | { | |
1802 | struct ceph_osd_request *req; | |
1803 | u64 last_tid, next_tid = 0; | |
1804 | ||
1805 | mutex_lock(&osdc->request_mutex); | |
1806 | last_tid = osdc->last_tid; | |
1807 | while (1) { | |
1808 | req = __lookup_request_ge(osdc, next_tid); | |
1809 | if (!req) | |
1810 | break; | |
1811 | if (req->r_tid > last_tid) | |
1812 | break; | |
1813 | ||
1814 | next_tid = req->r_tid + 1; | |
1815 | if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0) | |
1816 | continue; | |
1817 | ||
1818 | ceph_osdc_get_request(req); | |
1819 | mutex_unlock(&osdc->request_mutex); | |
1820 | dout("sync waiting on tid %llu (last is %llu)\n", | |
1821 | req->r_tid, last_tid); | |
1822 | wait_for_completion(&req->r_safe_completion); | |
1823 | mutex_lock(&osdc->request_mutex); | |
1824 | ceph_osdc_put_request(req); | |
1825 | } | |
1826 | mutex_unlock(&osdc->request_mutex); | |
1827 | dout("sync done (thru tid %llu)\n", last_tid); | |
1828 | } | |
3d14c5d2 | 1829 | EXPORT_SYMBOL(ceph_osdc_sync); |
f24e9980 SW |
1830 | |
1831 | /* | |
1832 | * init, shutdown | |
1833 | */ | |
1834 | int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) | |
1835 | { | |
1836 | int err; | |
1837 | ||
1838 | dout("init\n"); | |
1839 | osdc->client = client; | |
1840 | osdc->osdmap = NULL; | |
1841 | init_rwsem(&osdc->map_sem); | |
1842 | init_completion(&osdc->map_waiters); | |
1843 | osdc->last_requested_map = 0; | |
1844 | mutex_init(&osdc->request_mutex); | |
f24e9980 SW |
1845 | osdc->last_tid = 0; |
1846 | osdc->osds = RB_ROOT; | |
f5a2041b | 1847 | INIT_LIST_HEAD(&osdc->osd_lru); |
f24e9980 | 1848 | osdc->requests = RB_ROOT; |
422d2cb8 | 1849 | INIT_LIST_HEAD(&osdc->req_lru); |
6f6c7006 SW |
1850 | INIT_LIST_HEAD(&osdc->req_unsent); |
1851 | INIT_LIST_HEAD(&osdc->req_notarget); | |
a40c4f10 | 1852 | INIT_LIST_HEAD(&osdc->req_linger); |
f24e9980 SW |
1853 | osdc->num_requests = 0; |
1854 | INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); | |
f5a2041b | 1855 | INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); |
a40c4f10 YS |
1856 | spin_lock_init(&osdc->event_lock); |
1857 | osdc->event_tree = RB_ROOT; | |
1858 | osdc->event_count = 0; | |
f5a2041b YS |
1859 | |
1860 | schedule_delayed_work(&osdc->osds_timeout_work, | |
3d14c5d2 | 1861 | round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ)); |
f24e9980 | 1862 | |
5f44f142 | 1863 | err = -ENOMEM; |
f24e9980 SW |
1864 | osdc->req_mempool = mempool_create_kmalloc_pool(10, |
1865 | sizeof(struct ceph_osd_request)); | |
1866 | if (!osdc->req_mempool) | |
5f44f142 | 1867 | goto out; |
f24e9980 | 1868 | |
d50b409f SW |
1869 | err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, |
1870 | OSD_OP_FRONT_LEN, 10, true, | |
4f48280e | 1871 | "osd_op"); |
f24e9980 | 1872 | if (err < 0) |
5f44f142 | 1873 | goto out_mempool; |
d50b409f | 1874 | err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, |
4f48280e SW |
1875 | OSD_OPREPLY_FRONT_LEN, 10, true, |
1876 | "osd_op_reply"); | |
c16e7869 SW |
1877 | if (err < 0) |
1878 | goto out_msgpool; | |
a40c4f10 YS |
1879 | |
1880 | osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); | |
1881 | if (IS_ERR(osdc->notify_wq)) { | |
1882 | err = PTR_ERR(osdc->notify_wq); | |
1883 | osdc->notify_wq = NULL; | |
1884 | goto out_msgpool; | |
1885 | } | |
f24e9980 | 1886 | return 0; |
5f44f142 | 1887 | |
c16e7869 SW |
1888 | out_msgpool: |
1889 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
5f44f142 SW |
1890 | out_mempool: |
1891 | mempool_destroy(osdc->req_mempool); | |
1892 | out: | |
1893 | return err; | |
f24e9980 | 1894 | } |
3d14c5d2 | 1895 | EXPORT_SYMBOL(ceph_osdc_init); |
f24e9980 SW |
1896 | |
1897 | void ceph_osdc_stop(struct ceph_osd_client *osdc) | |
1898 | { | |
a40c4f10 YS |
1899 | flush_workqueue(osdc->notify_wq); |
1900 | destroy_workqueue(osdc->notify_wq); | |
f24e9980 | 1901 | cancel_delayed_work_sync(&osdc->timeout_work); |
f5a2041b | 1902 | cancel_delayed_work_sync(&osdc->osds_timeout_work); |
f24e9980 SW |
1903 | if (osdc->osdmap) { |
1904 | ceph_osdmap_destroy(osdc->osdmap); | |
1905 | osdc->osdmap = NULL; | |
1906 | } | |
aca420bc | 1907 | remove_all_osds(osdc); |
f24e9980 SW |
1908 | mempool_destroy(osdc->req_mempool); |
1909 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
c16e7869 | 1910 | ceph_msgpool_destroy(&osdc->msgpool_op_reply); |
f24e9980 | 1911 | } |
3d14c5d2 | 1912 | EXPORT_SYMBOL(ceph_osdc_stop); |
f24e9980 SW |
1913 | |
1914 | /* | |
1915 | * Read some contiguous pages. If we cross a stripe boundary, shorten | |
1916 | * *plen. Return number of bytes read, or error. | |
1917 | */ | |
1918 | int ceph_osdc_readpages(struct ceph_osd_client *osdc, | |
1919 | struct ceph_vino vino, struct ceph_file_layout *layout, | |
1920 | u64 off, u64 *plen, | |
1921 | u32 truncate_seq, u64 truncate_size, | |
b7495fc2 | 1922 | struct page **pages, int num_pages, int page_align) |
f24e9980 SW |
1923 | { |
1924 | struct ceph_osd_request *req; | |
1925 | int rc = 0; | |
1926 | ||
1927 | dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, | |
1928 | vino.snap, off, *plen); | |
1929 | req = ceph_osdc_new_request(osdc, layout, vino, off, plen, | |
1930 | CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, | |
1931 | NULL, 0, truncate_seq, truncate_size, NULL, | |
b7495fc2 | 1932 | false, 1, page_align); |
6816282d SW |
1933 | if (IS_ERR(req)) |
1934 | return PTR_ERR(req); | |
f24e9980 SW |
1935 | |
1936 | /* it may be a short read due to an object boundary */ | |
1937 | req->r_pages = pages; | |
f24e9980 | 1938 | |
b7495fc2 SW |
1939 | dout("readpages final extent is %llu~%llu (%d pages align %d)\n", |
1940 | off, *plen, req->r_num_pages, page_align); | |
f24e9980 SW |
1941 | |
1942 | rc = ceph_osdc_start_request(osdc, req, false); | |
1943 | if (!rc) | |
1944 | rc = ceph_osdc_wait_request(osdc, req); | |
1945 | ||
1946 | ceph_osdc_put_request(req); | |
1947 | dout("readpages result %d\n", rc); | |
1948 | return rc; | |
1949 | } | |
3d14c5d2 | 1950 | EXPORT_SYMBOL(ceph_osdc_readpages); |
f24e9980 SW |
1951 | |
1952 | /* | |
1953 | * do a synchronous write on N pages | |
1954 | */ | |
1955 | int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, | |
1956 | struct ceph_file_layout *layout, | |
1957 | struct ceph_snap_context *snapc, | |
1958 | u64 off, u64 len, | |
1959 | u32 truncate_seq, u64 truncate_size, | |
1960 | struct timespec *mtime, | |
1961 | struct page **pages, int num_pages, | |
1962 | int flags, int do_sync, bool nofail) | |
1963 | { | |
1964 | struct ceph_osd_request *req; | |
1965 | int rc = 0; | |
b7495fc2 | 1966 | int page_align = off & ~PAGE_MASK; |
f24e9980 SW |
1967 | |
1968 | BUG_ON(vino.snap != CEPH_NOSNAP); | |
1969 | req = ceph_osdc_new_request(osdc, layout, vino, off, &len, | |
1970 | CEPH_OSD_OP_WRITE, | |
1971 | flags | CEPH_OSD_FLAG_ONDISK | | |
1972 | CEPH_OSD_FLAG_WRITE, | |
1973 | snapc, do_sync, | |
1974 | truncate_seq, truncate_size, mtime, | |
b7495fc2 | 1975 | nofail, 1, page_align); |
6816282d SW |
1976 | if (IS_ERR(req)) |
1977 | return PTR_ERR(req); | |
f24e9980 SW |
1978 | |
1979 | /* it may be a short write due to an object boundary */ | |
1980 | req->r_pages = pages; | |
f24e9980 SW |
1981 | dout("writepages %llu~%llu (%d pages)\n", off, len, |
1982 | req->r_num_pages); | |
1983 | ||
1984 | rc = ceph_osdc_start_request(osdc, req, nofail); | |
1985 | if (!rc) | |
1986 | rc = ceph_osdc_wait_request(osdc, req); | |
1987 | ||
1988 | ceph_osdc_put_request(req); | |
1989 | if (rc == 0) | |
1990 | rc = len; | |
1991 | dout("writepages result %d\n", rc); | |
1992 | return rc; | |
1993 | } | |
3d14c5d2 | 1994 | EXPORT_SYMBOL(ceph_osdc_writepages); |
f24e9980 SW |
1995 | |
1996 | /* | |
1997 | * handle incoming message | |
1998 | */ | |
1999 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
2000 | { | |
2001 | struct ceph_osd *osd = con->private; | |
32c895e7 | 2002 | struct ceph_osd_client *osdc; |
f24e9980 SW |
2003 | int type = le16_to_cpu(msg->hdr.type); |
2004 | ||
2005 | if (!osd) | |
4a32f93d | 2006 | goto out; |
32c895e7 | 2007 | osdc = osd->o_osdc; |
f24e9980 SW |
2008 | |
2009 | switch (type) { | |
2010 | case CEPH_MSG_OSD_MAP: | |
2011 | ceph_osdc_handle_map(osdc, msg); | |
2012 | break; | |
2013 | case CEPH_MSG_OSD_OPREPLY: | |
350b1c32 | 2014 | handle_reply(osdc, msg, con); |
f24e9980 | 2015 | break; |
a40c4f10 YS |
2016 | case CEPH_MSG_WATCH_NOTIFY: |
2017 | handle_watch_notify(osdc, msg); | |
2018 | break; | |
f24e9980 SW |
2019 | |
2020 | default: | |
2021 | pr_err("received unknown message type %d %s\n", type, | |
2022 | ceph_msg_type_name(type)); | |
2023 | } | |
4a32f93d | 2024 | out: |
f24e9980 SW |
2025 | ceph_msg_put(msg); |
2026 | } | |
2027 | ||
5b3a4db3 | 2028 | /* |
21b667f6 SW |
2029 | * lookup and return message for incoming reply. set up reply message |
2030 | * pages. | |
5b3a4db3 SW |
2031 | */ |
2032 | static struct ceph_msg *get_reply(struct ceph_connection *con, | |
2450418c YS |
2033 | struct ceph_msg_header *hdr, |
2034 | int *skip) | |
f24e9980 SW |
2035 | { |
2036 | struct ceph_osd *osd = con->private; | |
2037 | struct ceph_osd_client *osdc = osd->o_osdc; | |
2450418c | 2038 | struct ceph_msg *m; |
0547a9b3 | 2039 | struct ceph_osd_request *req; |
5b3a4db3 SW |
2040 | int front = le32_to_cpu(hdr->front_len); |
2041 | int data_len = le32_to_cpu(hdr->data_len); | |
0547a9b3 | 2042 | u64 tid; |
f24e9980 | 2043 | |
0547a9b3 YS |
2044 | tid = le64_to_cpu(hdr->tid); |
2045 | mutex_lock(&osdc->request_mutex); | |
2046 | req = __lookup_request(osdc, tid); | |
2047 | if (!req) { | |
2048 | *skip = 1; | |
2049 | m = NULL; | |
756a16a5 SW |
2050 | dout("get_reply unknown tid %llu from osd%d\n", tid, |
2051 | osd->o_osd); | |
0547a9b3 YS |
2052 | goto out; |
2053 | } | |
c16e7869 SW |
2054 | |
2055 | if (req->r_con_filling_msg) { | |
8921d114 | 2056 | dout("%s revoking msg %p from old con %p\n", __func__, |
c16e7869 | 2057 | req->r_reply, req->r_con_filling_msg); |
8921d114 | 2058 | ceph_msg_revoke_incoming(req->r_reply); |
0d47766f | 2059 | req->r_con_filling_msg->ops->put(req->r_con_filling_msg); |
6f46cb29 | 2060 | req->r_con_filling_msg = NULL; |
0547a9b3 YS |
2061 | } |
2062 | ||
c16e7869 SW |
2063 | if (front > req->r_reply->front.iov_len) { |
2064 | pr_warning("get_reply front %d > preallocated %d\n", | |
2065 | front, (int)req->r_reply->front.iov_len); | |
b61c2763 | 2066 | m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS, false); |
a79832f2 | 2067 | if (!m) |
c16e7869 SW |
2068 | goto out; |
2069 | ceph_msg_put(req->r_reply); | |
2070 | req->r_reply = m; | |
2071 | } | |
2072 | m = ceph_msg_get(req->r_reply); | |
2073 | ||
0547a9b3 | 2074 | if (data_len > 0) { |
b7495fc2 | 2075 | int want = calc_pages_for(req->r_page_alignment, data_len); |
21b667f6 SW |
2076 | |
2077 | if (unlikely(req->r_num_pages < want)) { | |
9bb0ce2b SW |
2078 | pr_warning("tid %lld reply has %d bytes %d pages, we" |
2079 | " had only %d pages ready\n", tid, data_len, | |
2080 | want, req->r_num_pages); | |
0547a9b3 YS |
2081 | *skip = 1; |
2082 | ceph_msg_put(m); | |
a79832f2 | 2083 | m = NULL; |
21b667f6 | 2084 | goto out; |
0547a9b3 | 2085 | } |
21b667f6 SW |
2086 | m->pages = req->r_pages; |
2087 | m->nr_pages = req->r_num_pages; | |
c5c6b19d | 2088 | m->page_alignment = req->r_page_alignment; |
68b4476b YS |
2089 | #ifdef CONFIG_BLOCK |
2090 | m->bio = req->r_bio; | |
2091 | #endif | |
0547a9b3 | 2092 | } |
5b3a4db3 | 2093 | *skip = 0; |
0d47766f | 2094 | req->r_con_filling_msg = con->ops->get(con); |
c16e7869 | 2095 | dout("get_reply tid %lld %p\n", tid, m); |
0547a9b3 YS |
2096 | |
2097 | out: | |
2098 | mutex_unlock(&osdc->request_mutex); | |
2450418c | 2099 | return m; |
5b3a4db3 SW |
2100 | |
2101 | } | |
2102 | ||
2103 | static struct ceph_msg *alloc_msg(struct ceph_connection *con, | |
2104 | struct ceph_msg_header *hdr, | |
2105 | int *skip) | |
2106 | { | |
2107 | struct ceph_osd *osd = con->private; | |
2108 | int type = le16_to_cpu(hdr->type); | |
2109 | int front = le32_to_cpu(hdr->front_len); | |
2110 | ||
1c20f2d2 | 2111 | *skip = 0; |
5b3a4db3 SW |
2112 | switch (type) { |
2113 | case CEPH_MSG_OSD_MAP: | |
a40c4f10 | 2114 | case CEPH_MSG_WATCH_NOTIFY: |
b61c2763 | 2115 | return ceph_msg_new(type, front, GFP_NOFS, false); |
5b3a4db3 SW |
2116 | case CEPH_MSG_OSD_OPREPLY: |
2117 | return get_reply(con, hdr, skip); | |
2118 | default: | |
2119 | pr_info("alloc_msg unexpected msg type %d from osd%d\n", type, | |
2120 | osd->o_osd); | |
2121 | *skip = 1; | |
2122 | return NULL; | |
2123 | } | |
f24e9980 SW |
2124 | } |
2125 | ||
2126 | /* | |
2127 | * Wrappers to refcount containing ceph_osd struct | |
2128 | */ | |
2129 | static struct ceph_connection *get_osd_con(struct ceph_connection *con) | |
2130 | { | |
2131 | struct ceph_osd *osd = con->private; | |
2132 | if (get_osd(osd)) | |
2133 | return con; | |
2134 | return NULL; | |
2135 | } | |
2136 | ||
2137 | static void put_osd_con(struct ceph_connection *con) | |
2138 | { | |
2139 | struct ceph_osd *osd = con->private; | |
2140 | put_osd(osd); | |
2141 | } | |
2142 | ||
4e7a5dcd SW |
2143 | /* |
2144 | * authentication | |
2145 | */ | |
a3530df3 AE |
2146 | /* |
2147 | * Note: returned pointer is the address of a structure that's | |
2148 | * managed separately. Caller must *not* attempt to free it. | |
2149 | */ | |
2150 | static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, | |
8f43fb53 | 2151 | int *proto, int force_new) |
4e7a5dcd SW |
2152 | { |
2153 | struct ceph_osd *o = con->private; | |
2154 | struct ceph_osd_client *osdc = o->o_osdc; | |
2155 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
74f1869f | 2156 | struct ceph_auth_handshake *auth = &o->o_auth; |
4e7a5dcd | 2157 | |
74f1869f | 2158 | if (force_new && auth->authorizer) { |
a255651d AE |
2159 | if (ac->ops && ac->ops->destroy_authorizer) |
2160 | ac->ops->destroy_authorizer(ac, auth->authorizer); | |
74f1869f AE |
2161 | auth->authorizer = NULL; |
2162 | } | |
a255651d | 2163 | if (!auth->authorizer && ac->ops && ac->ops->create_authorizer) { |
a3530df3 AE |
2164 | int ret = ac->ops->create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, |
2165 | auth); | |
4e7a5dcd | 2166 | if (ret) |
a3530df3 | 2167 | return ERR_PTR(ret); |
4e7a5dcd | 2168 | } |
4e7a5dcd | 2169 | *proto = ac->protocol; |
74f1869f | 2170 | |
a3530df3 | 2171 | return auth; |
4e7a5dcd SW |
2172 | } |
2173 | ||
2174 | ||
2175 | static int verify_authorizer_reply(struct ceph_connection *con, int len) | |
2176 | { | |
2177 | struct ceph_osd *o = con->private; | |
2178 | struct ceph_osd_client *osdc = o->o_osdc; | |
2179 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
2180 | ||
a255651d AE |
2181 | /* |
2182 | * XXX If ac->ops or ac->ops->verify_authorizer_reply is null, | |
2183 | * XXX which do we do: succeed or fail? | |
2184 | */ | |
6c4a1915 | 2185 | return ac->ops->verify_authorizer_reply(ac, o->o_auth.authorizer, len); |
4e7a5dcd SW |
2186 | } |
2187 | ||
9bd2e6f8 SW |
2188 | static int invalidate_authorizer(struct ceph_connection *con) |
2189 | { | |
2190 | struct ceph_osd *o = con->private; | |
2191 | struct ceph_osd_client *osdc = o->o_osdc; | |
2192 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
2193 | ||
a255651d | 2194 | if (ac->ops && ac->ops->invalidate_authorizer) |
9bd2e6f8 SW |
2195 | ac->ops->invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); |
2196 | ||
2197 | return ceph_monc_validate_auth(&osdc->client->monc); | |
2198 | } | |
4e7a5dcd | 2199 | |
9e32789f | 2200 | static const struct ceph_connection_operations osd_con_ops = { |
f24e9980 SW |
2201 | .get = get_osd_con, |
2202 | .put = put_osd_con, | |
2203 | .dispatch = dispatch, | |
4e7a5dcd SW |
2204 | .get_authorizer = get_authorizer, |
2205 | .verify_authorizer_reply = verify_authorizer_reply, | |
9bd2e6f8 | 2206 | .invalidate_authorizer = invalidate_authorizer, |
f24e9980 | 2207 | .alloc_msg = alloc_msg, |
81b024e7 | 2208 | .fault = osd_reset, |
f24e9980 | 2209 | }; |