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); | |
f24e9980 | 28 | |
68b4476b YS |
29 | static int op_needs_trail(int op) |
30 | { | |
31 | switch (op) { | |
32 | case CEPH_OSD_OP_GETXATTR: | |
33 | case CEPH_OSD_OP_SETXATTR: | |
34 | case CEPH_OSD_OP_CMPXATTR: | |
35 | case CEPH_OSD_OP_CALL: | |
36 | return 1; | |
37 | default: | |
38 | return 0; | |
39 | } | |
40 | } | |
41 | ||
42 | static int op_has_extent(int op) | |
43 | { | |
44 | return (op == CEPH_OSD_OP_READ || | |
45 | op == CEPH_OSD_OP_WRITE); | |
46 | } | |
47 | ||
3499e8a5 YS |
48 | void ceph_calc_raw_layout(struct ceph_osd_client *osdc, |
49 | struct ceph_file_layout *layout, | |
50 | u64 snapid, | |
68b4476b YS |
51 | u64 off, u64 *plen, u64 *bno, |
52 | struct ceph_osd_request *req, | |
53 | struct ceph_osd_req_op *op) | |
3499e8a5 YS |
54 | { |
55 | struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base; | |
68b4476b | 56 | u64 orig_len = *plen; |
3499e8a5 YS |
57 | u64 objoff, objlen; /* extent in object */ |
58 | ||
59 | reqhead->snapid = cpu_to_le64(snapid); | |
60 | ||
61 | /* object extent? */ | |
68b4476b | 62 | ceph_calc_file_object_mapping(layout, off, plen, bno, |
3499e8a5 | 63 | &objoff, &objlen); |
68b4476b | 64 | if (*plen < orig_len) |
3499e8a5 | 65 | dout(" skipping last %llu, final file extent %llu~%llu\n", |
68b4476b | 66 | orig_len - *plen, off, *plen); |
3499e8a5 | 67 | |
68b4476b YS |
68 | if (op_has_extent(op->op)) { |
69 | op->extent.offset = objoff; | |
70 | op->extent.length = objlen; | |
71 | } | |
72 | req->r_num_pages = calc_pages_for(off, *plen); | |
b7495fc2 | 73 | req->r_page_alignment = off & ~PAGE_MASK; |
3d14c5d2 YS |
74 | if (op->op == CEPH_OSD_OP_WRITE) |
75 | op->payload_len = *plen; | |
3499e8a5 YS |
76 | |
77 | dout("calc_layout bno=%llx %llu~%llu (%d pages)\n", | |
78 | *bno, objoff, objlen, req->r_num_pages); | |
79 | ||
80 | } | |
3d14c5d2 | 81 | EXPORT_SYMBOL(ceph_calc_raw_layout); |
3499e8a5 | 82 | |
f24e9980 SW |
83 | /* |
84 | * Implement client access to distributed object storage cluster. | |
85 | * | |
86 | * All data objects are stored within a cluster/cloud of OSDs, or | |
87 | * "object storage devices." (Note that Ceph OSDs have _nothing_ to | |
88 | * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply | |
89 | * remote daemons serving up and coordinating consistent and safe | |
90 | * access to storage. | |
91 | * | |
92 | * Cluster membership and the mapping of data objects onto storage devices | |
93 | * are described by the osd map. | |
94 | * | |
95 | * We keep track of pending OSD requests (read, write), resubmit | |
96 | * requests to different OSDs when the cluster topology/data layout | |
97 | * change, or retry the affected requests when the communications | |
98 | * channel with an OSD is reset. | |
99 | */ | |
100 | ||
101 | /* | |
102 | * calculate the mapping of a file extent onto an object, and fill out the | |
103 | * request accordingly. shorten extent as necessary if it crosses an | |
104 | * object boundary. | |
105 | * | |
106 | * fill osd op in request message. | |
107 | */ | |
108 | static void calc_layout(struct ceph_osd_client *osdc, | |
3499e8a5 YS |
109 | struct ceph_vino vino, |
110 | struct ceph_file_layout *layout, | |
f24e9980 | 111 | u64 off, u64 *plen, |
68b4476b YS |
112 | struct ceph_osd_request *req, |
113 | struct ceph_osd_req_op *op) | |
f24e9980 | 114 | { |
f24e9980 SW |
115 | u64 bno; |
116 | ||
68b4476b YS |
117 | ceph_calc_raw_layout(osdc, layout, vino.snap, off, |
118 | plen, &bno, req, op); | |
f24e9980 SW |
119 | |
120 | sprintf(req->r_oid, "%llx.%08llx", vino.ino, bno); | |
121 | req->r_oid_len = strlen(req->r_oid); | |
f24e9980 SW |
122 | } |
123 | ||
f24e9980 SW |
124 | /* |
125 | * requests | |
126 | */ | |
415e49a9 | 127 | void ceph_osdc_release_request(struct kref *kref) |
f24e9980 | 128 | { |
415e49a9 SW |
129 | struct ceph_osd_request *req = container_of(kref, |
130 | struct ceph_osd_request, | |
131 | r_kref); | |
132 | ||
133 | if (req->r_request) | |
134 | ceph_msg_put(req->r_request); | |
135 | if (req->r_reply) | |
136 | ceph_msg_put(req->r_reply); | |
0d59ab81 | 137 | if (req->r_con_filling_msg) { |
350b1c32 | 138 | dout("release_request revoking pages %p from con %p\n", |
0d59ab81 YS |
139 | req->r_pages, req->r_con_filling_msg); |
140 | ceph_con_revoke_message(req->r_con_filling_msg, | |
141 | req->r_reply); | |
142 | ceph_con_put(req->r_con_filling_msg); | |
350b1c32 | 143 | } |
415e49a9 SW |
144 | if (req->r_own_pages) |
145 | ceph_release_page_vector(req->r_pages, | |
146 | req->r_num_pages); | |
68b4476b YS |
147 | #ifdef CONFIG_BLOCK |
148 | if (req->r_bio) | |
149 | bio_put(req->r_bio); | |
150 | #endif | |
415e49a9 | 151 | ceph_put_snap_context(req->r_snapc); |
68b4476b YS |
152 | if (req->r_trail) { |
153 | ceph_pagelist_release(req->r_trail); | |
154 | kfree(req->r_trail); | |
155 | } | |
415e49a9 SW |
156 | if (req->r_mempool) |
157 | mempool_free(req, req->r_osdc->req_mempool); | |
158 | else | |
159 | kfree(req); | |
f24e9980 | 160 | } |
3d14c5d2 | 161 | EXPORT_SYMBOL(ceph_osdc_release_request); |
68b4476b YS |
162 | |
163 | static int get_num_ops(struct ceph_osd_req_op *ops, int *needs_trail) | |
164 | { | |
165 | int i = 0; | |
166 | ||
167 | if (needs_trail) | |
168 | *needs_trail = 0; | |
169 | while (ops[i].op) { | |
170 | if (needs_trail && op_needs_trail(ops[i].op)) | |
171 | *needs_trail = 1; | |
172 | i++; | |
173 | } | |
174 | ||
175 | return i; | |
176 | } | |
177 | ||
3499e8a5 YS |
178 | struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, |
179 | int flags, | |
f24e9980 | 180 | struct ceph_snap_context *snapc, |
68b4476b | 181 | struct ceph_osd_req_op *ops, |
3499e8a5 YS |
182 | bool use_mempool, |
183 | gfp_t gfp_flags, | |
68b4476b YS |
184 | struct page **pages, |
185 | struct bio *bio) | |
f24e9980 SW |
186 | { |
187 | struct ceph_osd_request *req; | |
188 | struct ceph_msg *msg; | |
68b4476b YS |
189 | int needs_trail; |
190 | int num_op = get_num_ops(ops, &needs_trail); | |
191 | size_t msg_size = sizeof(struct ceph_osd_request_head); | |
3499e8a5 | 192 | |
68b4476b | 193 | msg_size += num_op*sizeof(struct ceph_osd_op); |
f24e9980 SW |
194 | |
195 | if (use_mempool) { | |
3499e8a5 | 196 | req = mempool_alloc(osdc->req_mempool, gfp_flags); |
f24e9980 SW |
197 | memset(req, 0, sizeof(*req)); |
198 | } else { | |
3499e8a5 | 199 | req = kzalloc(sizeof(*req), gfp_flags); |
f24e9980 SW |
200 | } |
201 | if (req == NULL) | |
a79832f2 | 202 | return NULL; |
f24e9980 | 203 | |
f24e9980 SW |
204 | req->r_osdc = osdc; |
205 | req->r_mempool = use_mempool; | |
68b4476b | 206 | |
415e49a9 | 207 | kref_init(&req->r_kref); |
f24e9980 SW |
208 | init_completion(&req->r_completion); |
209 | init_completion(&req->r_safe_completion); | |
210 | INIT_LIST_HEAD(&req->r_unsafe_item); | |
211 | req->r_flags = flags; | |
212 | ||
213 | WARN_ON((flags & (CEPH_OSD_FLAG_READ|CEPH_OSD_FLAG_WRITE)) == 0); | |
214 | ||
c16e7869 SW |
215 | /* create reply message */ |
216 | if (use_mempool) | |
217 | msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); | |
218 | else | |
219 | msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, | |
3499e8a5 | 220 | OSD_OPREPLY_FRONT_LEN, gfp_flags); |
a79832f2 | 221 | if (!msg) { |
c16e7869 | 222 | ceph_osdc_put_request(req); |
a79832f2 | 223 | return NULL; |
c16e7869 SW |
224 | } |
225 | req->r_reply = msg; | |
226 | ||
68b4476b YS |
227 | /* allocate space for the trailing data */ |
228 | if (needs_trail) { | |
229 | req->r_trail = kmalloc(sizeof(struct ceph_pagelist), gfp_flags); | |
230 | if (!req->r_trail) { | |
231 | ceph_osdc_put_request(req); | |
232 | return NULL; | |
233 | } | |
234 | ceph_pagelist_init(req->r_trail); | |
235 | } | |
c16e7869 | 236 | /* create request message; allow space for oid */ |
f24e9980 SW |
237 | msg_size += 40; |
238 | if (snapc) | |
239 | msg_size += sizeof(u64) * snapc->num_snaps; | |
240 | if (use_mempool) | |
8f3bc053 | 241 | msg = ceph_msgpool_get(&osdc->msgpool_op, 0); |
f24e9980 | 242 | else |
3499e8a5 | 243 | msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags); |
a79832f2 | 244 | if (!msg) { |
f24e9980 | 245 | ceph_osdc_put_request(req); |
a79832f2 | 246 | return NULL; |
f24e9980 | 247 | } |
68b4476b | 248 | |
f24e9980 SW |
249 | msg->hdr.type = cpu_to_le16(CEPH_MSG_OSD_OP); |
250 | memset(msg->front.iov_base, 0, msg->front.iov_len); | |
3499e8a5 YS |
251 | |
252 | req->r_request = msg; | |
253 | req->r_pages = pages; | |
68b4476b YS |
254 | #ifdef CONFIG_BLOCK |
255 | if (bio) { | |
256 | req->r_bio = bio; | |
257 | bio_get(req->r_bio); | |
258 | } | |
259 | #endif | |
3499e8a5 YS |
260 | |
261 | return req; | |
262 | } | |
3d14c5d2 | 263 | EXPORT_SYMBOL(ceph_osdc_alloc_request); |
3499e8a5 | 264 | |
68b4476b YS |
265 | static void osd_req_encode_op(struct ceph_osd_request *req, |
266 | struct ceph_osd_op *dst, | |
267 | struct ceph_osd_req_op *src) | |
268 | { | |
269 | dst->op = cpu_to_le16(src->op); | |
270 | ||
271 | switch (dst->op) { | |
272 | case CEPH_OSD_OP_READ: | |
273 | case CEPH_OSD_OP_WRITE: | |
274 | dst->extent.offset = | |
275 | cpu_to_le64(src->extent.offset); | |
276 | dst->extent.length = | |
277 | cpu_to_le64(src->extent.length); | |
278 | dst->extent.truncate_size = | |
279 | cpu_to_le64(src->extent.truncate_size); | |
280 | dst->extent.truncate_seq = | |
281 | cpu_to_le32(src->extent.truncate_seq); | |
282 | break; | |
283 | ||
284 | case CEPH_OSD_OP_GETXATTR: | |
285 | case CEPH_OSD_OP_SETXATTR: | |
286 | case CEPH_OSD_OP_CMPXATTR: | |
287 | BUG_ON(!req->r_trail); | |
288 | ||
289 | dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); | |
290 | dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); | |
291 | dst->xattr.cmp_op = src->xattr.cmp_op; | |
292 | dst->xattr.cmp_mode = src->xattr.cmp_mode; | |
293 | ceph_pagelist_append(req->r_trail, src->xattr.name, | |
294 | src->xattr.name_len); | |
295 | ceph_pagelist_append(req->r_trail, src->xattr.val, | |
296 | src->xattr.value_len); | |
297 | break; | |
ae1533b6 YS |
298 | case CEPH_OSD_OP_CALL: |
299 | BUG_ON(!req->r_trail); | |
300 | ||
301 | dst->cls.class_len = src->cls.class_len; | |
302 | dst->cls.method_len = src->cls.method_len; | |
303 | dst->cls.indata_len = cpu_to_le32(src->cls.indata_len); | |
304 | ||
305 | ceph_pagelist_append(req->r_trail, src->cls.class_name, | |
306 | src->cls.class_len); | |
307 | ceph_pagelist_append(req->r_trail, src->cls.method_name, | |
308 | src->cls.method_len); | |
309 | ceph_pagelist_append(req->r_trail, src->cls.indata, | |
310 | src->cls.indata_len); | |
311 | break; | |
312 | case CEPH_OSD_OP_ROLLBACK: | |
313 | dst->snap.snapid = cpu_to_le64(src->snap.snapid); | |
314 | break; | |
68b4476b YS |
315 | case CEPH_OSD_OP_STARTSYNC: |
316 | break; | |
317 | default: | |
318 | pr_err("unrecognized osd opcode %d\n", dst->op); | |
319 | WARN_ON(1); | |
320 | break; | |
321 | } | |
322 | dst->payload_len = cpu_to_le32(src->payload_len); | |
323 | } | |
324 | ||
3499e8a5 YS |
325 | /* |
326 | * build new request AND message | |
327 | * | |
328 | */ | |
329 | void ceph_osdc_build_request(struct ceph_osd_request *req, | |
68b4476b YS |
330 | u64 off, u64 *plen, |
331 | struct ceph_osd_req_op *src_ops, | |
332 | struct ceph_snap_context *snapc, | |
333 | struct timespec *mtime, | |
334 | const char *oid, | |
335 | int oid_len) | |
3499e8a5 YS |
336 | { |
337 | struct ceph_msg *msg = req->r_request; | |
338 | struct ceph_osd_request_head *head; | |
68b4476b | 339 | struct ceph_osd_req_op *src_op; |
3499e8a5 YS |
340 | struct ceph_osd_op *op; |
341 | void *p; | |
68b4476b | 342 | int num_op = get_num_ops(src_ops, NULL); |
3499e8a5 | 343 | size_t msg_size = sizeof(*head) + num_op*sizeof(*op); |
3499e8a5 | 344 | int flags = req->r_flags; |
68b4476b YS |
345 | u64 data_len = 0; |
346 | int i; | |
3499e8a5 | 347 | |
f24e9980 SW |
348 | head = msg->front.iov_base; |
349 | op = (void *)(head + 1); | |
350 | p = (void *)(op + num_op); | |
351 | ||
f24e9980 SW |
352 | req->r_snapc = ceph_get_snap_context(snapc); |
353 | ||
354 | head->client_inc = cpu_to_le32(1); /* always, for now. */ | |
355 | head->flags = cpu_to_le32(flags); | |
356 | if (flags & CEPH_OSD_FLAG_WRITE) | |
357 | ceph_encode_timespec(&head->mtime, mtime); | |
358 | head->num_ops = cpu_to_le16(num_op); | |
f24e9980 | 359 | |
f24e9980 SW |
360 | |
361 | /* fill in oid */ | |
3499e8a5 YS |
362 | head->object_len = cpu_to_le32(oid_len); |
363 | memcpy(p, oid, oid_len); | |
364 | p += oid_len; | |
f24e9980 | 365 | |
68b4476b YS |
366 | src_op = src_ops; |
367 | while (src_op->op) { | |
368 | osd_req_encode_op(req, op, src_op); | |
369 | src_op++; | |
f24e9980 | 370 | op++; |
f24e9980 | 371 | } |
68b4476b YS |
372 | |
373 | if (req->r_trail) | |
374 | data_len += req->r_trail->length; | |
375 | ||
f24e9980 SW |
376 | if (snapc) { |
377 | head->snap_seq = cpu_to_le64(snapc->seq); | |
378 | head->num_snaps = cpu_to_le32(snapc->num_snaps); | |
379 | for (i = 0; i < snapc->num_snaps; i++) { | |
380 | put_unaligned_le64(snapc->snaps[i], p); | |
381 | p += sizeof(u64); | |
382 | } | |
383 | } | |
384 | ||
68b4476b YS |
385 | if (flags & CEPH_OSD_FLAG_WRITE) { |
386 | req->r_request->hdr.data_off = cpu_to_le16(off); | |
387 | req->r_request->hdr.data_len = cpu_to_le32(*plen + data_len); | |
388 | } else if (data_len) { | |
389 | req->r_request->hdr.data_off = 0; | |
390 | req->r_request->hdr.data_len = cpu_to_le32(data_len); | |
391 | } | |
392 | ||
c5c6b19d SW |
393 | req->r_request->page_alignment = req->r_page_alignment; |
394 | ||
f24e9980 | 395 | BUG_ON(p > msg->front.iov_base + msg->front.iov_len); |
6f863e71 SW |
396 | msg_size = p - msg->front.iov_base; |
397 | msg->front.iov_len = msg_size; | |
398 | msg->hdr.front_len = cpu_to_le32(msg_size); | |
3499e8a5 YS |
399 | return; |
400 | } | |
3d14c5d2 | 401 | EXPORT_SYMBOL(ceph_osdc_build_request); |
3499e8a5 YS |
402 | |
403 | /* | |
404 | * build new request AND message, calculate layout, and adjust file | |
405 | * extent as needed. | |
406 | * | |
407 | * if the file was recently truncated, we include information about its | |
408 | * old and new size so that the object can be updated appropriately. (we | |
409 | * avoid synchronously deleting truncated objects because it's slow.) | |
410 | * | |
411 | * if @do_sync, include a 'startsync' command so that the osd will flush | |
412 | * data quickly. | |
413 | */ | |
414 | struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, | |
415 | struct ceph_file_layout *layout, | |
416 | struct ceph_vino vino, | |
417 | u64 off, u64 *plen, | |
418 | int opcode, int flags, | |
419 | struct ceph_snap_context *snapc, | |
420 | int do_sync, | |
421 | u32 truncate_seq, | |
422 | u64 truncate_size, | |
423 | struct timespec *mtime, | |
b7495fc2 SW |
424 | bool use_mempool, int num_reply, |
425 | int page_align) | |
3499e8a5 | 426 | { |
68b4476b YS |
427 | struct ceph_osd_req_op ops[3]; |
428 | struct ceph_osd_request *req; | |
429 | ||
430 | ops[0].op = opcode; | |
431 | ops[0].extent.truncate_seq = truncate_seq; | |
432 | ops[0].extent.truncate_size = truncate_size; | |
433 | ops[0].payload_len = 0; | |
434 | ||
435 | if (do_sync) { | |
436 | ops[1].op = CEPH_OSD_OP_STARTSYNC; | |
437 | ops[1].payload_len = 0; | |
438 | ops[2].op = 0; | |
439 | } else | |
440 | ops[1].op = 0; | |
441 | ||
442 | req = ceph_osdc_alloc_request(osdc, flags, | |
443 | snapc, ops, | |
3499e8a5 | 444 | use_mempool, |
68b4476b | 445 | GFP_NOFS, NULL, NULL); |
3499e8a5 YS |
446 | if (IS_ERR(req)) |
447 | return req; | |
448 | ||
449 | /* calculate max write size */ | |
68b4476b | 450 | calc_layout(osdc, vino, layout, off, plen, req, ops); |
3499e8a5 YS |
451 | req->r_file_layout = *layout; /* keep a copy */ |
452 | ||
b7495fc2 SW |
453 | /* in case it differs from natural alignment that calc_layout |
454 | filled in for us */ | |
455 | req->r_page_alignment = page_align; | |
456 | ||
68b4476b YS |
457 | ceph_osdc_build_request(req, off, plen, ops, |
458 | snapc, | |
3499e8a5 YS |
459 | mtime, |
460 | req->r_oid, req->r_oid_len); | |
461 | ||
f24e9980 SW |
462 | return req; |
463 | } | |
3d14c5d2 | 464 | EXPORT_SYMBOL(ceph_osdc_new_request); |
f24e9980 SW |
465 | |
466 | /* | |
467 | * We keep osd requests in an rbtree, sorted by ->r_tid. | |
468 | */ | |
469 | static void __insert_request(struct ceph_osd_client *osdc, | |
470 | struct ceph_osd_request *new) | |
471 | { | |
472 | struct rb_node **p = &osdc->requests.rb_node; | |
473 | struct rb_node *parent = NULL; | |
474 | struct ceph_osd_request *req = NULL; | |
475 | ||
476 | while (*p) { | |
477 | parent = *p; | |
478 | req = rb_entry(parent, struct ceph_osd_request, r_node); | |
479 | if (new->r_tid < req->r_tid) | |
480 | p = &(*p)->rb_left; | |
481 | else if (new->r_tid > req->r_tid) | |
482 | p = &(*p)->rb_right; | |
483 | else | |
484 | BUG(); | |
485 | } | |
486 | ||
487 | rb_link_node(&new->r_node, parent, p); | |
488 | rb_insert_color(&new->r_node, &osdc->requests); | |
489 | } | |
490 | ||
491 | static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc, | |
492 | u64 tid) | |
493 | { | |
494 | struct ceph_osd_request *req; | |
495 | struct rb_node *n = osdc->requests.rb_node; | |
496 | ||
497 | while (n) { | |
498 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
499 | if (tid < req->r_tid) | |
500 | n = n->rb_left; | |
501 | else if (tid > req->r_tid) | |
502 | n = n->rb_right; | |
503 | else | |
504 | return req; | |
505 | } | |
506 | return NULL; | |
507 | } | |
508 | ||
509 | static struct ceph_osd_request * | |
510 | __lookup_request_ge(struct ceph_osd_client *osdc, | |
511 | u64 tid) | |
512 | { | |
513 | struct ceph_osd_request *req; | |
514 | struct rb_node *n = osdc->requests.rb_node; | |
515 | ||
516 | while (n) { | |
517 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
518 | if (tid < req->r_tid) { | |
519 | if (!n->rb_left) | |
520 | return req; | |
521 | n = n->rb_left; | |
522 | } else if (tid > req->r_tid) { | |
523 | n = n->rb_right; | |
524 | } else { | |
525 | return req; | |
526 | } | |
527 | } | |
528 | return NULL; | |
529 | } | |
530 | ||
6f6c7006 SW |
531 | /* |
532 | * Resubmit requests pending on the given osd. | |
533 | */ | |
534 | static void __kick_osd_requests(struct ceph_osd_client *osdc, | |
535 | struct ceph_osd *osd) | |
536 | { | |
537 | struct ceph_osd_request *req; | |
538 | int err; | |
539 | ||
540 | dout("__kick_osd_requests osd%d\n", osd->o_osd); | |
541 | err = __reset_osd(osdc, osd); | |
542 | if (err == -EAGAIN) | |
543 | return; | |
544 | ||
545 | list_for_each_entry(req, &osd->o_requests, r_osd_item) { | |
546 | list_move(&req->r_req_lru_item, &osdc->req_unsent); | |
547 | dout("requeued %p tid %llu osd%d\n", req, req->r_tid, | |
548 | osd->o_osd); | |
549 | req->r_flags |= CEPH_OSD_FLAG_RETRY; | |
550 | } | |
551 | } | |
552 | ||
553 | static void kick_osd_requests(struct ceph_osd_client *osdc, | |
554 | struct ceph_osd *kickosd) | |
555 | { | |
556 | mutex_lock(&osdc->request_mutex); | |
557 | __kick_osd_requests(osdc, kickosd); | |
558 | mutex_unlock(&osdc->request_mutex); | |
559 | } | |
f24e9980 SW |
560 | |
561 | /* | |
81b024e7 | 562 | * If the osd connection drops, we need to resubmit all requests. |
f24e9980 SW |
563 | */ |
564 | static void osd_reset(struct ceph_connection *con) | |
565 | { | |
566 | struct ceph_osd *osd = con->private; | |
567 | struct ceph_osd_client *osdc; | |
568 | ||
569 | if (!osd) | |
570 | return; | |
571 | dout("osd_reset osd%d\n", osd->o_osd); | |
572 | osdc = osd->o_osdc; | |
f24e9980 | 573 | down_read(&osdc->map_sem); |
6f6c7006 SW |
574 | kick_osd_requests(osdc, osd); |
575 | send_queued(osdc); | |
f24e9980 SW |
576 | up_read(&osdc->map_sem); |
577 | } | |
578 | ||
579 | /* | |
580 | * Track open sessions with osds. | |
581 | */ | |
582 | static struct ceph_osd *create_osd(struct ceph_osd_client *osdc) | |
583 | { | |
584 | struct ceph_osd *osd; | |
585 | ||
586 | osd = kzalloc(sizeof(*osd), GFP_NOFS); | |
587 | if (!osd) | |
588 | return NULL; | |
589 | ||
590 | atomic_set(&osd->o_ref, 1); | |
591 | osd->o_osdc = osdc; | |
592 | INIT_LIST_HEAD(&osd->o_requests); | |
f5a2041b | 593 | INIT_LIST_HEAD(&osd->o_osd_lru); |
f24e9980 SW |
594 | osd->o_incarnation = 1; |
595 | ||
596 | ceph_con_init(osdc->client->msgr, &osd->o_con); | |
597 | osd->o_con.private = osd; | |
598 | osd->o_con.ops = &osd_con_ops; | |
599 | osd->o_con.peer_name.type = CEPH_ENTITY_TYPE_OSD; | |
4e7a5dcd | 600 | |
422d2cb8 | 601 | INIT_LIST_HEAD(&osd->o_keepalive_item); |
f24e9980 SW |
602 | return osd; |
603 | } | |
604 | ||
605 | static struct ceph_osd *get_osd(struct ceph_osd *osd) | |
606 | { | |
607 | if (atomic_inc_not_zero(&osd->o_ref)) { | |
608 | dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1, | |
609 | atomic_read(&osd->o_ref)); | |
610 | return osd; | |
611 | } else { | |
612 | dout("get_osd %p FAIL\n", osd); | |
613 | return NULL; | |
614 | } | |
615 | } | |
616 | ||
617 | static void put_osd(struct ceph_osd *osd) | |
618 | { | |
619 | dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref), | |
620 | atomic_read(&osd->o_ref) - 1); | |
79494d1b SW |
621 | if (atomic_dec_and_test(&osd->o_ref)) { |
622 | struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth; | |
623 | ||
624 | if (osd->o_authorizer) | |
625 | ac->ops->destroy_authorizer(ac, osd->o_authorizer); | |
f24e9980 | 626 | kfree(osd); |
79494d1b | 627 | } |
f24e9980 SW |
628 | } |
629 | ||
630 | /* | |
631 | * remove an osd from our map | |
632 | */ | |
f5a2041b | 633 | static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) |
f24e9980 | 634 | { |
f5a2041b | 635 | dout("__remove_osd %p\n", osd); |
f24e9980 SW |
636 | BUG_ON(!list_empty(&osd->o_requests)); |
637 | rb_erase(&osd->o_node, &osdc->osds); | |
f5a2041b | 638 | list_del_init(&osd->o_osd_lru); |
f24e9980 SW |
639 | ceph_con_close(&osd->o_con); |
640 | put_osd(osd); | |
641 | } | |
642 | ||
f5a2041b YS |
643 | static void __move_osd_to_lru(struct ceph_osd_client *osdc, |
644 | struct ceph_osd *osd) | |
645 | { | |
646 | dout("__move_osd_to_lru %p\n", osd); | |
647 | BUG_ON(!list_empty(&osd->o_osd_lru)); | |
648 | list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); | |
3d14c5d2 | 649 | osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ; |
f5a2041b YS |
650 | } |
651 | ||
652 | static void __remove_osd_from_lru(struct ceph_osd *osd) | |
653 | { | |
654 | dout("__remove_osd_from_lru %p\n", osd); | |
655 | if (!list_empty(&osd->o_osd_lru)) | |
656 | list_del_init(&osd->o_osd_lru); | |
657 | } | |
658 | ||
659 | static void remove_old_osds(struct ceph_osd_client *osdc, int remove_all) | |
660 | { | |
661 | struct ceph_osd *osd, *nosd; | |
662 | ||
663 | dout("__remove_old_osds %p\n", osdc); | |
664 | mutex_lock(&osdc->request_mutex); | |
665 | list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { | |
666 | if (!remove_all && time_before(jiffies, osd->lru_ttl)) | |
667 | break; | |
668 | __remove_osd(osdc, osd); | |
669 | } | |
670 | mutex_unlock(&osdc->request_mutex); | |
671 | } | |
672 | ||
f24e9980 SW |
673 | /* |
674 | * reset osd connect | |
675 | */ | |
f5a2041b | 676 | static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) |
f24e9980 | 677 | { |
87b315a5 | 678 | struct ceph_osd_request *req; |
f24e9980 SW |
679 | int ret = 0; |
680 | ||
f5a2041b | 681 | dout("__reset_osd %p osd%d\n", osd, osd->o_osd); |
f24e9980 | 682 | if (list_empty(&osd->o_requests)) { |
f5a2041b | 683 | __remove_osd(osdc, osd); |
87b315a5 SW |
684 | } else if (memcmp(&osdc->osdmap->osd_addr[osd->o_osd], |
685 | &osd->o_con.peer_addr, | |
686 | sizeof(osd->o_con.peer_addr)) == 0 && | |
687 | !ceph_con_opened(&osd->o_con)) { | |
688 | dout(" osd addr hasn't changed and connection never opened," | |
689 | " letting msgr retry"); | |
690 | /* touch each r_stamp for handle_timeout()'s benfit */ | |
691 | list_for_each_entry(req, &osd->o_requests, r_osd_item) | |
692 | req->r_stamp = jiffies; | |
693 | ret = -EAGAIN; | |
f24e9980 SW |
694 | } else { |
695 | ceph_con_close(&osd->o_con); | |
696 | ceph_con_open(&osd->o_con, &osdc->osdmap->osd_addr[osd->o_osd]); | |
697 | osd->o_incarnation++; | |
698 | } | |
699 | return ret; | |
700 | } | |
701 | ||
702 | static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new) | |
703 | { | |
704 | struct rb_node **p = &osdc->osds.rb_node; | |
705 | struct rb_node *parent = NULL; | |
706 | struct ceph_osd *osd = NULL; | |
707 | ||
708 | while (*p) { | |
709 | parent = *p; | |
710 | osd = rb_entry(parent, struct ceph_osd, o_node); | |
711 | if (new->o_osd < osd->o_osd) | |
712 | p = &(*p)->rb_left; | |
713 | else if (new->o_osd > osd->o_osd) | |
714 | p = &(*p)->rb_right; | |
715 | else | |
716 | BUG(); | |
717 | } | |
718 | ||
719 | rb_link_node(&new->o_node, parent, p); | |
720 | rb_insert_color(&new->o_node, &osdc->osds); | |
721 | } | |
722 | ||
723 | static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o) | |
724 | { | |
725 | struct ceph_osd *osd; | |
726 | struct rb_node *n = osdc->osds.rb_node; | |
727 | ||
728 | while (n) { | |
729 | osd = rb_entry(n, struct ceph_osd, o_node); | |
730 | if (o < osd->o_osd) | |
731 | n = n->rb_left; | |
732 | else if (o > osd->o_osd) | |
733 | n = n->rb_right; | |
734 | else | |
735 | return osd; | |
736 | } | |
737 | return NULL; | |
738 | } | |
739 | ||
422d2cb8 YS |
740 | static void __schedule_osd_timeout(struct ceph_osd_client *osdc) |
741 | { | |
742 | schedule_delayed_work(&osdc->timeout_work, | |
3d14c5d2 | 743 | osdc->client->options->osd_keepalive_timeout * HZ); |
422d2cb8 YS |
744 | } |
745 | ||
746 | static void __cancel_osd_timeout(struct ceph_osd_client *osdc) | |
747 | { | |
748 | cancel_delayed_work(&osdc->timeout_work); | |
749 | } | |
f24e9980 SW |
750 | |
751 | /* | |
752 | * Register request, assign tid. If this is the first request, set up | |
753 | * the timeout event. | |
754 | */ | |
755 | static void register_request(struct ceph_osd_client *osdc, | |
756 | struct ceph_osd_request *req) | |
757 | { | |
f24e9980 SW |
758 | mutex_lock(&osdc->request_mutex); |
759 | req->r_tid = ++osdc->last_tid; | |
6df058c0 | 760 | req->r_request->hdr.tid = cpu_to_le64(req->r_tid); |
422d2cb8 | 761 | INIT_LIST_HEAD(&req->r_req_lru_item); |
f24e9980 SW |
762 | |
763 | dout("register_request %p tid %lld\n", req, req->r_tid); | |
764 | __insert_request(osdc, req); | |
765 | ceph_osdc_get_request(req); | |
766 | osdc->num_requests++; | |
767 | ||
f24e9980 | 768 | if (osdc->num_requests == 1) { |
422d2cb8 YS |
769 | dout(" first request, scheduling timeout\n"); |
770 | __schedule_osd_timeout(osdc); | |
f24e9980 SW |
771 | } |
772 | mutex_unlock(&osdc->request_mutex); | |
773 | } | |
774 | ||
775 | /* | |
776 | * called under osdc->request_mutex | |
777 | */ | |
778 | static void __unregister_request(struct ceph_osd_client *osdc, | |
779 | struct ceph_osd_request *req) | |
780 | { | |
781 | dout("__unregister_request %p tid %lld\n", req, req->r_tid); | |
782 | rb_erase(&req->r_node, &osdc->requests); | |
783 | osdc->num_requests--; | |
784 | ||
0ba6478d SW |
785 | if (req->r_osd) { |
786 | /* make sure the original request isn't in flight. */ | |
787 | ceph_con_revoke(&req->r_osd->o_con, req->r_request); | |
788 | ||
789 | list_del_init(&req->r_osd_item); | |
790 | if (list_empty(&req->r_osd->o_requests)) | |
f5a2041b | 791 | __move_osd_to_lru(osdc, req->r_osd); |
0ba6478d SW |
792 | req->r_osd = NULL; |
793 | } | |
f24e9980 SW |
794 | |
795 | ceph_osdc_put_request(req); | |
796 | ||
422d2cb8 YS |
797 | list_del_init(&req->r_req_lru_item); |
798 | if (osdc->num_requests == 0) { | |
799 | dout(" no requests, canceling timeout\n"); | |
800 | __cancel_osd_timeout(osdc); | |
f24e9980 SW |
801 | } |
802 | } | |
803 | ||
804 | /* | |
805 | * Cancel a previously queued request message | |
806 | */ | |
807 | static void __cancel_request(struct ceph_osd_request *req) | |
808 | { | |
6bc18876 | 809 | if (req->r_sent && req->r_osd) { |
f24e9980 SW |
810 | ceph_con_revoke(&req->r_osd->o_con, req->r_request); |
811 | req->r_sent = 0; | |
812 | } | |
813 | } | |
814 | ||
815 | /* | |
816 | * Pick an osd (the first 'up' osd in the pg), allocate the osd struct | |
817 | * (as needed), and set the request r_osd appropriately. If there is | |
6f6c7006 SW |
818 | * no up osd, set r_osd to NULL. Move the request to the appropiate list |
819 | * (unsent, homeless) or leave on in-flight lru. | |
f24e9980 SW |
820 | * |
821 | * Return 0 if unchanged, 1 if changed, or negative on error. | |
822 | * | |
823 | * Caller should hold map_sem for read and request_mutex. | |
824 | */ | |
6f6c7006 SW |
825 | static int __map_request(struct ceph_osd_client *osdc, |
826 | struct ceph_osd_request *req) | |
f24e9980 SW |
827 | { |
828 | struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base; | |
51042122 | 829 | struct ceph_pg pgid; |
d85b7056 SW |
830 | int acting[CEPH_PG_MAX_SIZE]; |
831 | int o = -1, num = 0; | |
f24e9980 | 832 | int err; |
f24e9980 | 833 | |
6f6c7006 | 834 | dout("map_request %p tid %lld\n", req, req->r_tid); |
f24e9980 SW |
835 | err = ceph_calc_object_layout(&reqhead->layout, req->r_oid, |
836 | &req->r_file_layout, osdc->osdmap); | |
6f6c7006 SW |
837 | if (err) { |
838 | list_move(&req->r_req_lru_item, &osdc->req_notarget); | |
f24e9980 | 839 | return err; |
6f6c7006 | 840 | } |
51042122 | 841 | pgid = reqhead->layout.ol_pgid; |
7740a42f SW |
842 | req->r_pgid = pgid; |
843 | ||
d85b7056 SW |
844 | err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting); |
845 | if (err > 0) { | |
846 | o = acting[0]; | |
847 | num = err; | |
848 | } | |
f24e9980 SW |
849 | |
850 | if ((req->r_osd && req->r_osd->o_osd == o && | |
d85b7056 SW |
851 | req->r_sent >= req->r_osd->o_incarnation && |
852 | req->r_num_pg_osds == num && | |
853 | memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) || | |
f24e9980 SW |
854 | (req->r_osd == NULL && o == -1)) |
855 | return 0; /* no change */ | |
856 | ||
6f6c7006 | 857 | dout("map_request tid %llu pgid %d.%x osd%d (was osd%d)\n", |
51042122 | 858 | req->r_tid, le32_to_cpu(pgid.pool), le16_to_cpu(pgid.ps), o, |
f24e9980 SW |
859 | req->r_osd ? req->r_osd->o_osd : -1); |
860 | ||
d85b7056 SW |
861 | /* record full pg acting set */ |
862 | memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num); | |
863 | req->r_num_pg_osds = num; | |
864 | ||
f24e9980 SW |
865 | if (req->r_osd) { |
866 | __cancel_request(req); | |
867 | list_del_init(&req->r_osd_item); | |
f24e9980 SW |
868 | req->r_osd = NULL; |
869 | } | |
870 | ||
871 | req->r_osd = __lookup_osd(osdc, o); | |
872 | if (!req->r_osd && o >= 0) { | |
c99eb1c7 SW |
873 | err = -ENOMEM; |
874 | req->r_osd = create_osd(osdc); | |
6f6c7006 SW |
875 | if (!req->r_osd) { |
876 | list_move(&req->r_req_lru_item, &osdc->req_notarget); | |
c99eb1c7 | 877 | goto out; |
6f6c7006 | 878 | } |
f24e9980 | 879 | |
6f6c7006 | 880 | dout("map_request osd %p is osd%d\n", req->r_osd, o); |
f24e9980 SW |
881 | req->r_osd->o_osd = o; |
882 | req->r_osd->o_con.peer_name.num = cpu_to_le64(o); | |
883 | __insert_osd(osdc, req->r_osd); | |
884 | ||
885 | ceph_con_open(&req->r_osd->o_con, &osdc->osdmap->osd_addr[o]); | |
886 | } | |
887 | ||
f5a2041b YS |
888 | if (req->r_osd) { |
889 | __remove_osd_from_lru(req->r_osd); | |
f24e9980 | 890 | list_add(&req->r_osd_item, &req->r_osd->o_requests); |
6f6c7006 SW |
891 | list_move(&req->r_req_lru_item, &osdc->req_unsent); |
892 | } else { | |
893 | list_move(&req->r_req_lru_item, &osdc->req_notarget); | |
f5a2041b | 894 | } |
d85b7056 | 895 | err = 1; /* osd or pg changed */ |
f24e9980 SW |
896 | |
897 | out: | |
f24e9980 SW |
898 | return err; |
899 | } | |
900 | ||
901 | /* | |
902 | * caller should hold map_sem (for read) and request_mutex | |
903 | */ | |
904 | static int __send_request(struct ceph_osd_client *osdc, | |
905 | struct ceph_osd_request *req) | |
906 | { | |
907 | struct ceph_osd_request_head *reqhead; | |
f24e9980 SW |
908 | |
909 | dout("send_request %p tid %llu to osd%d flags %d\n", | |
910 | req, req->r_tid, req->r_osd->o_osd, req->r_flags); | |
911 | ||
912 | reqhead = req->r_request->front.iov_base; | |
913 | reqhead->osdmap_epoch = cpu_to_le32(osdc->osdmap->epoch); | |
914 | reqhead->flags |= cpu_to_le32(req->r_flags); /* e.g., RETRY */ | |
915 | reqhead->reassert_version = req->r_reassert_version; | |
916 | ||
3dd72fc0 | 917 | req->r_stamp = jiffies; |
07a27e22 | 918 | list_move_tail(&req->r_req_lru_item, &osdc->req_lru); |
f24e9980 SW |
919 | |
920 | ceph_msg_get(req->r_request); /* send consumes a ref */ | |
921 | ceph_con_send(&req->r_osd->o_con, req->r_request); | |
922 | req->r_sent = req->r_osd->o_incarnation; | |
923 | return 0; | |
924 | } | |
925 | ||
6f6c7006 SW |
926 | /* |
927 | * Send any requests in the queue (req_unsent). | |
928 | */ | |
929 | static void send_queued(struct ceph_osd_client *osdc) | |
930 | { | |
931 | struct ceph_osd_request *req, *tmp; | |
932 | ||
933 | dout("send_queued\n"); | |
934 | mutex_lock(&osdc->request_mutex); | |
935 | list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item) { | |
936 | __send_request(osdc, req); | |
937 | } | |
938 | mutex_unlock(&osdc->request_mutex); | |
939 | } | |
940 | ||
f24e9980 SW |
941 | /* |
942 | * Timeout callback, called every N seconds when 1 or more osd | |
943 | * requests has been active for more than N seconds. When this | |
944 | * happens, we ping all OSDs with requests who have timed out to | |
945 | * ensure any communications channel reset is detected. Reset the | |
946 | * request timeouts another N seconds in the future as we go. | |
947 | * Reschedule the timeout event another N seconds in future (unless | |
948 | * there are no open requests). | |
949 | */ | |
950 | static void handle_timeout(struct work_struct *work) | |
951 | { | |
952 | struct ceph_osd_client *osdc = | |
953 | container_of(work, struct ceph_osd_client, timeout_work.work); | |
422d2cb8 | 954 | struct ceph_osd_request *req, *last_req = NULL; |
f24e9980 | 955 | struct ceph_osd *osd; |
3d14c5d2 | 956 | unsigned long timeout = osdc->client->options->osd_timeout * HZ; |
422d2cb8 | 957 | unsigned long keepalive = |
3d14c5d2 | 958 | osdc->client->options->osd_keepalive_timeout * HZ; |
3dd72fc0 | 959 | unsigned long last_stamp = 0; |
422d2cb8 | 960 | struct list_head slow_osds; |
f24e9980 SW |
961 | |
962 | dout("timeout\n"); | |
963 | down_read(&osdc->map_sem); | |
964 | ||
965 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
966 | ||
967 | mutex_lock(&osdc->request_mutex); | |
f24e9980 | 968 | |
422d2cb8 YS |
969 | /* |
970 | * reset osds that appear to be _really_ unresponsive. this | |
971 | * is a failsafe measure.. we really shouldn't be getting to | |
972 | * this point if the system is working properly. the monitors | |
973 | * should mark the osd as failed and we should find out about | |
974 | * it from an updated osd map. | |
975 | */ | |
f26e681d | 976 | while (timeout && !list_empty(&osdc->req_lru)) { |
422d2cb8 YS |
977 | req = list_entry(osdc->req_lru.next, struct ceph_osd_request, |
978 | r_req_lru_item); | |
979 | ||
3dd72fc0 | 980 | if (time_before(jiffies, req->r_stamp + timeout)) |
422d2cb8 YS |
981 | break; |
982 | ||
3dd72fc0 | 983 | BUG_ON(req == last_req && req->r_stamp == last_stamp); |
422d2cb8 | 984 | last_req = req; |
3dd72fc0 | 985 | last_stamp = req->r_stamp; |
422d2cb8 YS |
986 | |
987 | osd = req->r_osd; | |
988 | BUG_ON(!osd); | |
989 | pr_warning(" tid %llu timed out on osd%d, will reset osd\n", | |
990 | req->r_tid, osd->o_osd); | |
6f6c7006 | 991 | __kick_osd_requests(osdc, osd); |
422d2cb8 YS |
992 | } |
993 | ||
994 | /* | |
995 | * ping osds that are a bit slow. this ensures that if there | |
996 | * is a break in the TCP connection we will notice, and reopen | |
997 | * a connection with that osd (from the fault callback). | |
998 | */ | |
999 | INIT_LIST_HEAD(&slow_osds); | |
1000 | list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) { | |
3dd72fc0 | 1001 | if (time_before(jiffies, req->r_stamp + keepalive)) |
422d2cb8 YS |
1002 | break; |
1003 | ||
1004 | osd = req->r_osd; | |
1005 | BUG_ON(!osd); | |
1006 | dout(" tid %llu is slow, will send keepalive on osd%d\n", | |
f24e9980 | 1007 | req->r_tid, osd->o_osd); |
422d2cb8 YS |
1008 | list_move_tail(&osd->o_keepalive_item, &slow_osds); |
1009 | } | |
1010 | while (!list_empty(&slow_osds)) { | |
1011 | osd = list_entry(slow_osds.next, struct ceph_osd, | |
1012 | o_keepalive_item); | |
1013 | list_del_init(&osd->o_keepalive_item); | |
f24e9980 SW |
1014 | ceph_con_keepalive(&osd->o_con); |
1015 | } | |
1016 | ||
422d2cb8 | 1017 | __schedule_osd_timeout(osdc); |
f24e9980 | 1018 | mutex_unlock(&osdc->request_mutex); |
6f6c7006 | 1019 | send_queued(osdc); |
f24e9980 SW |
1020 | up_read(&osdc->map_sem); |
1021 | } | |
1022 | ||
f5a2041b YS |
1023 | static void handle_osds_timeout(struct work_struct *work) |
1024 | { | |
1025 | struct ceph_osd_client *osdc = | |
1026 | container_of(work, struct ceph_osd_client, | |
1027 | osds_timeout_work.work); | |
1028 | unsigned long delay = | |
3d14c5d2 | 1029 | osdc->client->options->osd_idle_ttl * HZ >> 2; |
f5a2041b YS |
1030 | |
1031 | dout("osds timeout\n"); | |
1032 | down_read(&osdc->map_sem); | |
1033 | remove_old_osds(osdc, 0); | |
1034 | up_read(&osdc->map_sem); | |
1035 | ||
1036 | schedule_delayed_work(&osdc->osds_timeout_work, | |
1037 | round_jiffies_relative(delay)); | |
1038 | } | |
1039 | ||
f24e9980 SW |
1040 | /* |
1041 | * handle osd op reply. either call the callback if it is specified, | |
1042 | * or do the completion to wake up the waiting thread. | |
1043 | */ | |
350b1c32 SW |
1044 | static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg, |
1045 | struct ceph_connection *con) | |
f24e9980 SW |
1046 | { |
1047 | struct ceph_osd_reply_head *rhead = msg->front.iov_base; | |
1048 | struct ceph_osd_request *req; | |
1049 | u64 tid; | |
1050 | int numops, object_len, flags; | |
0ceed5db | 1051 | s32 result; |
f24e9980 | 1052 | |
6df058c0 | 1053 | tid = le64_to_cpu(msg->hdr.tid); |
f24e9980 SW |
1054 | if (msg->front.iov_len < sizeof(*rhead)) |
1055 | goto bad; | |
f24e9980 SW |
1056 | numops = le32_to_cpu(rhead->num_ops); |
1057 | object_len = le32_to_cpu(rhead->object_len); | |
0ceed5db | 1058 | result = le32_to_cpu(rhead->result); |
f24e9980 SW |
1059 | if (msg->front.iov_len != sizeof(*rhead) + object_len + |
1060 | numops * sizeof(struct ceph_osd_op)) | |
1061 | goto bad; | |
0ceed5db | 1062 | dout("handle_reply %p tid %llu result %d\n", msg, tid, (int)result); |
f24e9980 SW |
1063 | |
1064 | /* lookup */ | |
1065 | mutex_lock(&osdc->request_mutex); | |
1066 | req = __lookup_request(osdc, tid); | |
1067 | if (req == NULL) { | |
1068 | dout("handle_reply tid %llu dne\n", tid); | |
1069 | mutex_unlock(&osdc->request_mutex); | |
1070 | return; | |
1071 | } | |
1072 | ceph_osdc_get_request(req); | |
1073 | flags = le32_to_cpu(rhead->flags); | |
1074 | ||
350b1c32 | 1075 | /* |
0d59ab81 | 1076 | * if this connection filled our message, drop our reference now, to |
350b1c32 SW |
1077 | * avoid a (safe but slower) revoke later. |
1078 | */ | |
0d59ab81 | 1079 | if (req->r_con_filling_msg == con && req->r_reply == msg) { |
c16e7869 | 1080 | dout(" dropping con_filling_msg ref %p\n", con); |
0d59ab81 | 1081 | req->r_con_filling_msg = NULL; |
350b1c32 SW |
1082 | ceph_con_put(con); |
1083 | } | |
1084 | ||
f24e9980 SW |
1085 | if (!req->r_got_reply) { |
1086 | unsigned bytes; | |
1087 | ||
1088 | req->r_result = le32_to_cpu(rhead->result); | |
1089 | bytes = le32_to_cpu(msg->hdr.data_len); | |
1090 | dout("handle_reply result %d bytes %d\n", req->r_result, | |
1091 | bytes); | |
1092 | if (req->r_result == 0) | |
1093 | req->r_result = bytes; | |
1094 | ||
1095 | /* in case this is a write and we need to replay, */ | |
1096 | req->r_reassert_version = rhead->reassert_version; | |
1097 | ||
1098 | req->r_got_reply = 1; | |
1099 | } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) { | |
1100 | dout("handle_reply tid %llu dup ack\n", tid); | |
34b43a56 | 1101 | mutex_unlock(&osdc->request_mutex); |
f24e9980 SW |
1102 | goto done; |
1103 | } | |
1104 | ||
1105 | dout("handle_reply tid %llu flags %d\n", tid, flags); | |
1106 | ||
1107 | /* either this is a read, or we got the safe response */ | |
0ceed5db SW |
1108 | if (result < 0 || |
1109 | (flags & CEPH_OSD_FLAG_ONDISK) || | |
f24e9980 SW |
1110 | ((flags & CEPH_OSD_FLAG_WRITE) == 0)) |
1111 | __unregister_request(osdc, req); | |
1112 | ||
1113 | mutex_unlock(&osdc->request_mutex); | |
1114 | ||
1115 | if (req->r_callback) | |
1116 | req->r_callback(req, msg); | |
1117 | else | |
03066f23 | 1118 | complete_all(&req->r_completion); |
f24e9980 SW |
1119 | |
1120 | if (flags & CEPH_OSD_FLAG_ONDISK) { | |
1121 | if (req->r_safe_callback) | |
1122 | req->r_safe_callback(req, msg); | |
03066f23 | 1123 | complete_all(&req->r_safe_completion); /* fsync waiter */ |
f24e9980 SW |
1124 | } |
1125 | ||
1126 | done: | |
1127 | ceph_osdc_put_request(req); | |
1128 | return; | |
1129 | ||
1130 | bad: | |
1131 | pr_err("corrupt osd_op_reply got %d %d expected %d\n", | |
1132 | (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len), | |
1133 | (int)sizeof(*rhead)); | |
9ec7cab1 | 1134 | ceph_msg_dump(msg); |
f24e9980 SW |
1135 | } |
1136 | ||
6f6c7006 | 1137 | static void reset_changed_osds(struct ceph_osd_client *osdc) |
f24e9980 | 1138 | { |
f24e9980 | 1139 | struct rb_node *p, *n; |
f24e9980 | 1140 | |
6f6c7006 SW |
1141 | for (p = rb_first(&osdc->osds); p; p = n) { |
1142 | struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node); | |
f24e9980 | 1143 | |
6f6c7006 SW |
1144 | n = rb_next(p); |
1145 | if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || | |
1146 | memcmp(&osd->o_con.peer_addr, | |
1147 | ceph_osd_addr(osdc->osdmap, | |
1148 | osd->o_osd), | |
1149 | sizeof(struct ceph_entity_addr)) != 0) | |
1150 | __reset_osd(osdc, osd); | |
f24e9980 | 1151 | } |
422d2cb8 YS |
1152 | } |
1153 | ||
1154 | /* | |
6f6c7006 SW |
1155 | * Requeue requests whose mapping to an OSD has changed. If requests map to |
1156 | * no osd, request a new map. | |
422d2cb8 YS |
1157 | * |
1158 | * Caller should hold map_sem for read and request_mutex. | |
1159 | */ | |
6f6c7006 | 1160 | static void kick_requests(struct ceph_osd_client *osdc) |
422d2cb8 | 1161 | { |
6f6c7006 SW |
1162 | struct ceph_osd_request *req; |
1163 | struct rb_node *p; | |
1164 | int needmap = 0; | |
1165 | int err; | |
422d2cb8 | 1166 | |
6f6c7006 | 1167 | dout("kick_requests\n"); |
422d2cb8 | 1168 | mutex_lock(&osdc->request_mutex); |
6f6c7006 SW |
1169 | for (p = rb_first(&osdc->requests); p; p = rb_next(p)) { |
1170 | req = rb_entry(p, struct ceph_osd_request, r_node); | |
1171 | err = __map_request(osdc, req); | |
1172 | if (err < 0) | |
1173 | continue; /* error */ | |
1174 | if (req->r_osd == NULL) { | |
1175 | dout("%p tid %llu maps to no osd\n", req, req->r_tid); | |
1176 | needmap++; /* request a newer map */ | |
1177 | } else if (err > 0) { | |
1178 | dout("%p tid %llu requeued on osd%d\n", req, req->r_tid, | |
1179 | req->r_osd ? req->r_osd->o_osd : -1); | |
1180 | req->r_flags |= CEPH_OSD_FLAG_RETRY; | |
1181 | } | |
1182 | } | |
f24e9980 SW |
1183 | mutex_unlock(&osdc->request_mutex); |
1184 | ||
1185 | if (needmap) { | |
1186 | dout("%d requests for down osds, need new map\n", needmap); | |
1187 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1188 | } | |
422d2cb8 | 1189 | } |
6f6c7006 SW |
1190 | |
1191 | ||
f24e9980 SW |
1192 | /* |
1193 | * Process updated osd map. | |
1194 | * | |
1195 | * The message contains any number of incremental and full maps, normally | |
1196 | * indicating some sort of topology change in the cluster. Kick requests | |
1197 | * off to different OSDs as needed. | |
1198 | */ | |
1199 | void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) | |
1200 | { | |
1201 | void *p, *end, *next; | |
1202 | u32 nr_maps, maplen; | |
1203 | u32 epoch; | |
1204 | struct ceph_osdmap *newmap = NULL, *oldmap; | |
1205 | int err; | |
1206 | struct ceph_fsid fsid; | |
1207 | ||
1208 | dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0); | |
1209 | p = msg->front.iov_base; | |
1210 | end = p + msg->front.iov_len; | |
1211 | ||
1212 | /* verify fsid */ | |
1213 | ceph_decode_need(&p, end, sizeof(fsid), bad); | |
1214 | ceph_decode_copy(&p, &fsid, sizeof(fsid)); | |
0743304d SW |
1215 | if (ceph_check_fsid(osdc->client, &fsid) < 0) |
1216 | return; | |
f24e9980 SW |
1217 | |
1218 | down_write(&osdc->map_sem); | |
1219 | ||
1220 | /* incremental maps */ | |
1221 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
1222 | dout(" %d inc maps\n", nr_maps); | |
1223 | while (nr_maps > 0) { | |
1224 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
1225 | epoch = ceph_decode_32(&p); |
1226 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
1227 | ceph_decode_need(&p, end, maplen, bad); |
1228 | next = p + maplen; | |
1229 | if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) { | |
1230 | dout("applying incremental map %u len %d\n", | |
1231 | epoch, maplen); | |
1232 | newmap = osdmap_apply_incremental(&p, next, | |
1233 | osdc->osdmap, | |
1234 | osdc->client->msgr); | |
1235 | if (IS_ERR(newmap)) { | |
1236 | err = PTR_ERR(newmap); | |
1237 | goto bad; | |
1238 | } | |
30dc6381 | 1239 | BUG_ON(!newmap); |
f24e9980 SW |
1240 | if (newmap != osdc->osdmap) { |
1241 | ceph_osdmap_destroy(osdc->osdmap); | |
1242 | osdc->osdmap = newmap; | |
1243 | } | |
6f6c7006 SW |
1244 | kick_requests(osdc); |
1245 | reset_changed_osds(osdc); | |
f24e9980 SW |
1246 | } else { |
1247 | dout("ignoring incremental map %u len %d\n", | |
1248 | epoch, maplen); | |
1249 | } | |
1250 | p = next; | |
1251 | nr_maps--; | |
1252 | } | |
1253 | if (newmap) | |
1254 | goto done; | |
1255 | ||
1256 | /* full maps */ | |
1257 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
1258 | dout(" %d full maps\n", nr_maps); | |
1259 | while (nr_maps) { | |
1260 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
1261 | epoch = ceph_decode_32(&p); |
1262 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
1263 | ceph_decode_need(&p, end, maplen, bad); |
1264 | if (nr_maps > 1) { | |
1265 | dout("skipping non-latest full map %u len %d\n", | |
1266 | epoch, maplen); | |
1267 | } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) { | |
1268 | dout("skipping full map %u len %d, " | |
1269 | "older than our %u\n", epoch, maplen, | |
1270 | osdc->osdmap->epoch); | |
1271 | } else { | |
1272 | dout("taking full map %u len %d\n", epoch, maplen); | |
1273 | newmap = osdmap_decode(&p, p+maplen); | |
1274 | if (IS_ERR(newmap)) { | |
1275 | err = PTR_ERR(newmap); | |
1276 | goto bad; | |
1277 | } | |
30dc6381 | 1278 | BUG_ON(!newmap); |
f24e9980 SW |
1279 | oldmap = osdc->osdmap; |
1280 | osdc->osdmap = newmap; | |
1281 | if (oldmap) | |
1282 | ceph_osdmap_destroy(oldmap); | |
6f6c7006 | 1283 | kick_requests(osdc); |
f24e9980 SW |
1284 | } |
1285 | p += maplen; | |
1286 | nr_maps--; | |
1287 | } | |
1288 | ||
1289 | done: | |
1290 | downgrade_write(&osdc->map_sem); | |
1291 | ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch); | |
6f6c7006 | 1292 | send_queued(osdc); |
f24e9980 | 1293 | up_read(&osdc->map_sem); |
03066f23 | 1294 | wake_up_all(&osdc->client->auth_wq); |
f24e9980 SW |
1295 | return; |
1296 | ||
1297 | bad: | |
1298 | pr_err("osdc handle_map corrupt msg\n"); | |
9ec7cab1 | 1299 | ceph_msg_dump(msg); |
f24e9980 SW |
1300 | up_write(&osdc->map_sem); |
1301 | return; | |
1302 | } | |
1303 | ||
f24e9980 SW |
1304 | /* |
1305 | * Register request, send initial attempt. | |
1306 | */ | |
1307 | int ceph_osdc_start_request(struct ceph_osd_client *osdc, | |
1308 | struct ceph_osd_request *req, | |
1309 | bool nofail) | |
1310 | { | |
c1ea8823 | 1311 | int rc = 0; |
f24e9980 SW |
1312 | |
1313 | req->r_request->pages = req->r_pages; | |
1314 | req->r_request->nr_pages = req->r_num_pages; | |
68b4476b YS |
1315 | #ifdef CONFIG_BLOCK |
1316 | req->r_request->bio = req->r_bio; | |
1317 | #endif | |
1318 | req->r_request->trail = req->r_trail; | |
f24e9980 SW |
1319 | |
1320 | register_request(osdc, req); | |
1321 | ||
1322 | down_read(&osdc->map_sem); | |
1323 | mutex_lock(&osdc->request_mutex); | |
c1ea8823 SW |
1324 | /* |
1325 | * a racing kick_requests() may have sent the message for us | |
1326 | * while we dropped request_mutex above, so only send now if | |
1327 | * the request still han't been touched yet. | |
1328 | */ | |
1329 | if (req->r_sent == 0) { | |
6f6c7006 SW |
1330 | rc = __map_request(osdc, req); |
1331 | if (rc < 0) | |
1332 | return rc; | |
1333 | if (req->r_osd == NULL) { | |
1334 | dout("send_request %p no up osds in pg\n", req); | |
1335 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1336 | } else { | |
1337 | rc = __send_request(osdc, req); | |
1338 | if (rc) { | |
1339 | if (nofail) { | |
1340 | dout("osdc_start_request failed send, " | |
1341 | " will retry %lld\n", req->r_tid); | |
1342 | rc = 0; | |
1343 | } else { | |
1344 | __unregister_request(osdc, req); | |
1345 | } | |
c1ea8823 | 1346 | } |
f24e9980 SW |
1347 | } |
1348 | } | |
1349 | mutex_unlock(&osdc->request_mutex); | |
1350 | up_read(&osdc->map_sem); | |
1351 | return rc; | |
1352 | } | |
3d14c5d2 | 1353 | EXPORT_SYMBOL(ceph_osdc_start_request); |
f24e9980 SW |
1354 | |
1355 | /* | |
1356 | * wait for a request to complete | |
1357 | */ | |
1358 | int ceph_osdc_wait_request(struct ceph_osd_client *osdc, | |
1359 | struct ceph_osd_request *req) | |
1360 | { | |
1361 | int rc; | |
1362 | ||
1363 | rc = wait_for_completion_interruptible(&req->r_completion); | |
1364 | if (rc < 0) { | |
1365 | mutex_lock(&osdc->request_mutex); | |
1366 | __cancel_request(req); | |
529cfcc4 | 1367 | __unregister_request(osdc, req); |
f24e9980 | 1368 | mutex_unlock(&osdc->request_mutex); |
529cfcc4 | 1369 | dout("wait_request tid %llu canceled/timed out\n", req->r_tid); |
f24e9980 SW |
1370 | return rc; |
1371 | } | |
1372 | ||
1373 | dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result); | |
1374 | return req->r_result; | |
1375 | } | |
3d14c5d2 | 1376 | EXPORT_SYMBOL(ceph_osdc_wait_request); |
f24e9980 SW |
1377 | |
1378 | /* | |
1379 | * sync - wait for all in-flight requests to flush. avoid starvation. | |
1380 | */ | |
1381 | void ceph_osdc_sync(struct ceph_osd_client *osdc) | |
1382 | { | |
1383 | struct ceph_osd_request *req; | |
1384 | u64 last_tid, next_tid = 0; | |
1385 | ||
1386 | mutex_lock(&osdc->request_mutex); | |
1387 | last_tid = osdc->last_tid; | |
1388 | while (1) { | |
1389 | req = __lookup_request_ge(osdc, next_tid); | |
1390 | if (!req) | |
1391 | break; | |
1392 | if (req->r_tid > last_tid) | |
1393 | break; | |
1394 | ||
1395 | next_tid = req->r_tid + 1; | |
1396 | if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0) | |
1397 | continue; | |
1398 | ||
1399 | ceph_osdc_get_request(req); | |
1400 | mutex_unlock(&osdc->request_mutex); | |
1401 | dout("sync waiting on tid %llu (last is %llu)\n", | |
1402 | req->r_tid, last_tid); | |
1403 | wait_for_completion(&req->r_safe_completion); | |
1404 | mutex_lock(&osdc->request_mutex); | |
1405 | ceph_osdc_put_request(req); | |
1406 | } | |
1407 | mutex_unlock(&osdc->request_mutex); | |
1408 | dout("sync done (thru tid %llu)\n", last_tid); | |
1409 | } | |
3d14c5d2 | 1410 | EXPORT_SYMBOL(ceph_osdc_sync); |
f24e9980 SW |
1411 | |
1412 | /* | |
1413 | * init, shutdown | |
1414 | */ | |
1415 | int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) | |
1416 | { | |
1417 | int err; | |
1418 | ||
1419 | dout("init\n"); | |
1420 | osdc->client = client; | |
1421 | osdc->osdmap = NULL; | |
1422 | init_rwsem(&osdc->map_sem); | |
1423 | init_completion(&osdc->map_waiters); | |
1424 | osdc->last_requested_map = 0; | |
1425 | mutex_init(&osdc->request_mutex); | |
f24e9980 SW |
1426 | osdc->last_tid = 0; |
1427 | osdc->osds = RB_ROOT; | |
f5a2041b | 1428 | INIT_LIST_HEAD(&osdc->osd_lru); |
f24e9980 | 1429 | osdc->requests = RB_ROOT; |
422d2cb8 | 1430 | INIT_LIST_HEAD(&osdc->req_lru); |
6f6c7006 SW |
1431 | INIT_LIST_HEAD(&osdc->req_unsent); |
1432 | INIT_LIST_HEAD(&osdc->req_notarget); | |
f24e9980 SW |
1433 | osdc->num_requests = 0; |
1434 | INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); | |
f5a2041b YS |
1435 | INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); |
1436 | ||
1437 | schedule_delayed_work(&osdc->osds_timeout_work, | |
3d14c5d2 | 1438 | round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ)); |
f24e9980 | 1439 | |
5f44f142 | 1440 | err = -ENOMEM; |
f24e9980 SW |
1441 | osdc->req_mempool = mempool_create_kmalloc_pool(10, |
1442 | sizeof(struct ceph_osd_request)); | |
1443 | if (!osdc->req_mempool) | |
5f44f142 | 1444 | goto out; |
f24e9980 | 1445 | |
4f48280e SW |
1446 | err = ceph_msgpool_init(&osdc->msgpool_op, OSD_OP_FRONT_LEN, 10, true, |
1447 | "osd_op"); | |
f24e9980 | 1448 | if (err < 0) |
5f44f142 | 1449 | goto out_mempool; |
c16e7869 | 1450 | err = ceph_msgpool_init(&osdc->msgpool_op_reply, |
4f48280e SW |
1451 | OSD_OPREPLY_FRONT_LEN, 10, true, |
1452 | "osd_op_reply"); | |
c16e7869 SW |
1453 | if (err < 0) |
1454 | goto out_msgpool; | |
f24e9980 | 1455 | return 0; |
5f44f142 | 1456 | |
c16e7869 SW |
1457 | out_msgpool: |
1458 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
5f44f142 SW |
1459 | out_mempool: |
1460 | mempool_destroy(osdc->req_mempool); | |
1461 | out: | |
1462 | return err; | |
f24e9980 | 1463 | } |
3d14c5d2 | 1464 | EXPORT_SYMBOL(ceph_osdc_init); |
f24e9980 SW |
1465 | |
1466 | void ceph_osdc_stop(struct ceph_osd_client *osdc) | |
1467 | { | |
1468 | cancel_delayed_work_sync(&osdc->timeout_work); | |
f5a2041b | 1469 | cancel_delayed_work_sync(&osdc->osds_timeout_work); |
f24e9980 SW |
1470 | if (osdc->osdmap) { |
1471 | ceph_osdmap_destroy(osdc->osdmap); | |
1472 | osdc->osdmap = NULL; | |
1473 | } | |
f5a2041b | 1474 | remove_old_osds(osdc, 1); |
f24e9980 SW |
1475 | mempool_destroy(osdc->req_mempool); |
1476 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
c16e7869 | 1477 | ceph_msgpool_destroy(&osdc->msgpool_op_reply); |
f24e9980 | 1478 | } |
3d14c5d2 | 1479 | EXPORT_SYMBOL(ceph_osdc_stop); |
f24e9980 SW |
1480 | |
1481 | /* | |
1482 | * Read some contiguous pages. If we cross a stripe boundary, shorten | |
1483 | * *plen. Return number of bytes read, or error. | |
1484 | */ | |
1485 | int ceph_osdc_readpages(struct ceph_osd_client *osdc, | |
1486 | struct ceph_vino vino, struct ceph_file_layout *layout, | |
1487 | u64 off, u64 *plen, | |
1488 | u32 truncate_seq, u64 truncate_size, | |
b7495fc2 | 1489 | struct page **pages, int num_pages, int page_align) |
f24e9980 SW |
1490 | { |
1491 | struct ceph_osd_request *req; | |
1492 | int rc = 0; | |
1493 | ||
1494 | dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, | |
1495 | vino.snap, off, *plen); | |
1496 | req = ceph_osdc_new_request(osdc, layout, vino, off, plen, | |
1497 | CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, | |
1498 | NULL, 0, truncate_seq, truncate_size, NULL, | |
b7495fc2 | 1499 | false, 1, page_align); |
a79832f2 SW |
1500 | if (!req) |
1501 | return -ENOMEM; | |
f24e9980 SW |
1502 | |
1503 | /* it may be a short read due to an object boundary */ | |
1504 | req->r_pages = pages; | |
f24e9980 | 1505 | |
b7495fc2 SW |
1506 | dout("readpages final extent is %llu~%llu (%d pages align %d)\n", |
1507 | off, *plen, req->r_num_pages, page_align); | |
f24e9980 SW |
1508 | |
1509 | rc = ceph_osdc_start_request(osdc, req, false); | |
1510 | if (!rc) | |
1511 | rc = ceph_osdc_wait_request(osdc, req); | |
1512 | ||
1513 | ceph_osdc_put_request(req); | |
1514 | dout("readpages result %d\n", rc); | |
1515 | return rc; | |
1516 | } | |
3d14c5d2 | 1517 | EXPORT_SYMBOL(ceph_osdc_readpages); |
f24e9980 SW |
1518 | |
1519 | /* | |
1520 | * do a synchronous write on N pages | |
1521 | */ | |
1522 | int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, | |
1523 | struct ceph_file_layout *layout, | |
1524 | struct ceph_snap_context *snapc, | |
1525 | u64 off, u64 len, | |
1526 | u32 truncate_seq, u64 truncate_size, | |
1527 | struct timespec *mtime, | |
1528 | struct page **pages, int num_pages, | |
1529 | int flags, int do_sync, bool nofail) | |
1530 | { | |
1531 | struct ceph_osd_request *req; | |
1532 | int rc = 0; | |
b7495fc2 | 1533 | int page_align = off & ~PAGE_MASK; |
f24e9980 SW |
1534 | |
1535 | BUG_ON(vino.snap != CEPH_NOSNAP); | |
1536 | req = ceph_osdc_new_request(osdc, layout, vino, off, &len, | |
1537 | CEPH_OSD_OP_WRITE, | |
1538 | flags | CEPH_OSD_FLAG_ONDISK | | |
1539 | CEPH_OSD_FLAG_WRITE, | |
1540 | snapc, do_sync, | |
1541 | truncate_seq, truncate_size, mtime, | |
b7495fc2 | 1542 | nofail, 1, page_align); |
a79832f2 SW |
1543 | if (!req) |
1544 | return -ENOMEM; | |
f24e9980 SW |
1545 | |
1546 | /* it may be a short write due to an object boundary */ | |
1547 | req->r_pages = pages; | |
f24e9980 SW |
1548 | dout("writepages %llu~%llu (%d pages)\n", off, len, |
1549 | req->r_num_pages); | |
1550 | ||
1551 | rc = ceph_osdc_start_request(osdc, req, nofail); | |
1552 | if (!rc) | |
1553 | rc = ceph_osdc_wait_request(osdc, req); | |
1554 | ||
1555 | ceph_osdc_put_request(req); | |
1556 | if (rc == 0) | |
1557 | rc = len; | |
1558 | dout("writepages result %d\n", rc); | |
1559 | return rc; | |
1560 | } | |
3d14c5d2 | 1561 | EXPORT_SYMBOL(ceph_osdc_writepages); |
f24e9980 SW |
1562 | |
1563 | /* | |
1564 | * handle incoming message | |
1565 | */ | |
1566 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
1567 | { | |
1568 | struct ceph_osd *osd = con->private; | |
32c895e7 | 1569 | struct ceph_osd_client *osdc; |
f24e9980 SW |
1570 | int type = le16_to_cpu(msg->hdr.type); |
1571 | ||
1572 | if (!osd) | |
4a32f93d | 1573 | goto out; |
32c895e7 | 1574 | osdc = osd->o_osdc; |
f24e9980 SW |
1575 | |
1576 | switch (type) { | |
1577 | case CEPH_MSG_OSD_MAP: | |
1578 | ceph_osdc_handle_map(osdc, msg); | |
1579 | break; | |
1580 | case CEPH_MSG_OSD_OPREPLY: | |
350b1c32 | 1581 | handle_reply(osdc, msg, con); |
f24e9980 SW |
1582 | break; |
1583 | ||
1584 | default: | |
1585 | pr_err("received unknown message type %d %s\n", type, | |
1586 | ceph_msg_type_name(type)); | |
1587 | } | |
4a32f93d | 1588 | out: |
f24e9980 SW |
1589 | ceph_msg_put(msg); |
1590 | } | |
1591 | ||
5b3a4db3 | 1592 | /* |
21b667f6 SW |
1593 | * lookup and return message for incoming reply. set up reply message |
1594 | * pages. | |
5b3a4db3 SW |
1595 | */ |
1596 | static struct ceph_msg *get_reply(struct ceph_connection *con, | |
2450418c YS |
1597 | struct ceph_msg_header *hdr, |
1598 | int *skip) | |
f24e9980 SW |
1599 | { |
1600 | struct ceph_osd *osd = con->private; | |
1601 | struct ceph_osd_client *osdc = osd->o_osdc; | |
2450418c | 1602 | struct ceph_msg *m; |
0547a9b3 | 1603 | struct ceph_osd_request *req; |
5b3a4db3 SW |
1604 | int front = le32_to_cpu(hdr->front_len); |
1605 | int data_len = le32_to_cpu(hdr->data_len); | |
0547a9b3 | 1606 | u64 tid; |
f24e9980 | 1607 | |
0547a9b3 YS |
1608 | tid = le64_to_cpu(hdr->tid); |
1609 | mutex_lock(&osdc->request_mutex); | |
1610 | req = __lookup_request(osdc, tid); | |
1611 | if (!req) { | |
1612 | *skip = 1; | |
1613 | m = NULL; | |
c16e7869 | 1614 | pr_info("get_reply unknown tid %llu from osd%d\n", tid, |
5b3a4db3 | 1615 | osd->o_osd); |
0547a9b3 YS |
1616 | goto out; |
1617 | } | |
c16e7869 SW |
1618 | |
1619 | if (req->r_con_filling_msg) { | |
1620 | dout("get_reply revoking msg %p from old con %p\n", | |
1621 | req->r_reply, req->r_con_filling_msg); | |
1622 | ceph_con_revoke_message(req->r_con_filling_msg, req->r_reply); | |
1623 | ceph_con_put(req->r_con_filling_msg); | |
6f46cb29 | 1624 | req->r_con_filling_msg = NULL; |
0547a9b3 YS |
1625 | } |
1626 | ||
c16e7869 SW |
1627 | if (front > req->r_reply->front.iov_len) { |
1628 | pr_warning("get_reply front %d > preallocated %d\n", | |
1629 | front, (int)req->r_reply->front.iov_len); | |
34d23762 | 1630 | m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS); |
a79832f2 | 1631 | if (!m) |
c16e7869 SW |
1632 | goto out; |
1633 | ceph_msg_put(req->r_reply); | |
1634 | req->r_reply = m; | |
1635 | } | |
1636 | m = ceph_msg_get(req->r_reply); | |
1637 | ||
0547a9b3 | 1638 | if (data_len > 0) { |
b7495fc2 | 1639 | int want = calc_pages_for(req->r_page_alignment, data_len); |
21b667f6 SW |
1640 | |
1641 | if (unlikely(req->r_num_pages < want)) { | |
1642 | pr_warning("tid %lld reply %d > expected %d pages\n", | |
1643 | tid, want, m->nr_pages); | |
0547a9b3 YS |
1644 | *skip = 1; |
1645 | ceph_msg_put(m); | |
a79832f2 | 1646 | m = NULL; |
21b667f6 | 1647 | goto out; |
0547a9b3 | 1648 | } |
21b667f6 SW |
1649 | m->pages = req->r_pages; |
1650 | m->nr_pages = req->r_num_pages; | |
c5c6b19d | 1651 | m->page_alignment = req->r_page_alignment; |
68b4476b YS |
1652 | #ifdef CONFIG_BLOCK |
1653 | m->bio = req->r_bio; | |
1654 | #endif | |
0547a9b3 | 1655 | } |
5b3a4db3 | 1656 | *skip = 0; |
c16e7869 SW |
1657 | req->r_con_filling_msg = ceph_con_get(con); |
1658 | dout("get_reply tid %lld %p\n", tid, m); | |
0547a9b3 YS |
1659 | |
1660 | out: | |
1661 | mutex_unlock(&osdc->request_mutex); | |
2450418c | 1662 | return m; |
5b3a4db3 SW |
1663 | |
1664 | } | |
1665 | ||
1666 | static struct ceph_msg *alloc_msg(struct ceph_connection *con, | |
1667 | struct ceph_msg_header *hdr, | |
1668 | int *skip) | |
1669 | { | |
1670 | struct ceph_osd *osd = con->private; | |
1671 | int type = le16_to_cpu(hdr->type); | |
1672 | int front = le32_to_cpu(hdr->front_len); | |
1673 | ||
1674 | switch (type) { | |
1675 | case CEPH_MSG_OSD_MAP: | |
34d23762 | 1676 | return ceph_msg_new(type, front, GFP_NOFS); |
5b3a4db3 SW |
1677 | case CEPH_MSG_OSD_OPREPLY: |
1678 | return get_reply(con, hdr, skip); | |
1679 | default: | |
1680 | pr_info("alloc_msg unexpected msg type %d from osd%d\n", type, | |
1681 | osd->o_osd); | |
1682 | *skip = 1; | |
1683 | return NULL; | |
1684 | } | |
f24e9980 SW |
1685 | } |
1686 | ||
1687 | /* | |
1688 | * Wrappers to refcount containing ceph_osd struct | |
1689 | */ | |
1690 | static struct ceph_connection *get_osd_con(struct ceph_connection *con) | |
1691 | { | |
1692 | struct ceph_osd *osd = con->private; | |
1693 | if (get_osd(osd)) | |
1694 | return con; | |
1695 | return NULL; | |
1696 | } | |
1697 | ||
1698 | static void put_osd_con(struct ceph_connection *con) | |
1699 | { | |
1700 | struct ceph_osd *osd = con->private; | |
1701 | put_osd(osd); | |
1702 | } | |
1703 | ||
4e7a5dcd SW |
1704 | /* |
1705 | * authentication | |
1706 | */ | |
1707 | static int get_authorizer(struct ceph_connection *con, | |
213c99ee SW |
1708 | void **buf, int *len, int *proto, |
1709 | void **reply_buf, int *reply_len, int force_new) | |
4e7a5dcd SW |
1710 | { |
1711 | struct ceph_osd *o = con->private; | |
1712 | struct ceph_osd_client *osdc = o->o_osdc; | |
1713 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
1714 | int ret = 0; | |
1715 | ||
1716 | if (force_new && o->o_authorizer) { | |
1717 | ac->ops->destroy_authorizer(ac, o->o_authorizer); | |
1718 | o->o_authorizer = NULL; | |
1719 | } | |
1720 | if (o->o_authorizer == NULL) { | |
1721 | ret = ac->ops->create_authorizer( | |
1722 | ac, CEPH_ENTITY_TYPE_OSD, | |
1723 | &o->o_authorizer, | |
1724 | &o->o_authorizer_buf, | |
1725 | &o->o_authorizer_buf_len, | |
1726 | &o->o_authorizer_reply_buf, | |
1727 | &o->o_authorizer_reply_buf_len); | |
1728 | if (ret) | |
213c99ee | 1729 | return ret; |
4e7a5dcd SW |
1730 | } |
1731 | ||
1732 | *proto = ac->protocol; | |
1733 | *buf = o->o_authorizer_buf; | |
1734 | *len = o->o_authorizer_buf_len; | |
1735 | *reply_buf = o->o_authorizer_reply_buf; | |
1736 | *reply_len = o->o_authorizer_reply_buf_len; | |
1737 | return 0; | |
1738 | } | |
1739 | ||
1740 | ||
1741 | static int verify_authorizer_reply(struct ceph_connection *con, int len) | |
1742 | { | |
1743 | struct ceph_osd *o = con->private; | |
1744 | struct ceph_osd_client *osdc = o->o_osdc; | |
1745 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
1746 | ||
1747 | return ac->ops->verify_authorizer_reply(ac, o->o_authorizer, len); | |
1748 | } | |
1749 | ||
9bd2e6f8 SW |
1750 | static int invalidate_authorizer(struct ceph_connection *con) |
1751 | { | |
1752 | struct ceph_osd *o = con->private; | |
1753 | struct ceph_osd_client *osdc = o->o_osdc; | |
1754 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
1755 | ||
1756 | if (ac->ops->invalidate_authorizer) | |
1757 | ac->ops->invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); | |
1758 | ||
1759 | return ceph_monc_validate_auth(&osdc->client->monc); | |
1760 | } | |
4e7a5dcd | 1761 | |
9e32789f | 1762 | static const struct ceph_connection_operations osd_con_ops = { |
f24e9980 SW |
1763 | .get = get_osd_con, |
1764 | .put = put_osd_con, | |
1765 | .dispatch = dispatch, | |
4e7a5dcd SW |
1766 | .get_authorizer = get_authorizer, |
1767 | .verify_authorizer_reply = verify_authorizer_reply, | |
9bd2e6f8 | 1768 | .invalidate_authorizer = invalidate_authorizer, |
f24e9980 | 1769 | .alloc_msg = alloc_msg, |
81b024e7 | 1770 | .fault = osd_reset, |
f24e9980 | 1771 | }; |