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3d14c5d2 | 1 | #include <linux/ceph/ceph_debug.h> |
f24e9980 | 2 | |
3d14c5d2 | 3 | #include <linux/module.h> |
f24e9980 SW |
4 | #include <linux/err.h> |
5 | #include <linux/highmem.h> | |
6 | #include <linux/mm.h> | |
7 | #include <linux/pagemap.h> | |
8 | #include <linux/slab.h> | |
9 | #include <linux/uaccess.h> | |
68b4476b YS |
10 | #ifdef CONFIG_BLOCK |
11 | #include <linux/bio.h> | |
12 | #endif | |
f24e9980 | 13 | |
3d14c5d2 YS |
14 | #include <linux/ceph/libceph.h> |
15 | #include <linux/ceph/osd_client.h> | |
16 | #include <linux/ceph/messenger.h> | |
17 | #include <linux/ceph/decode.h> | |
18 | #include <linux/ceph/auth.h> | |
19 | #include <linux/ceph/pagelist.h> | |
f24e9980 | 20 | |
c16e7869 SW |
21 | #define OSD_OP_FRONT_LEN 4096 |
22 | #define OSD_OPREPLY_FRONT_LEN 512 | |
0d59ab81 | 23 | |
9e32789f | 24 | static const struct ceph_connection_operations osd_con_ops; |
f24e9980 | 25 | |
6f6c7006 SW |
26 | static void send_queued(struct ceph_osd_client *osdc); |
27 | static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd); | |
a40c4f10 YS |
28 | static void __register_request(struct ceph_osd_client *osdc, |
29 | struct ceph_osd_request *req); | |
30 | static void __unregister_linger_request(struct ceph_osd_client *osdc, | |
31 | struct ceph_osd_request *req); | |
32 | static int __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 | ||
3499e8a5 YS |
55 | void ceph_calc_raw_layout(struct ceph_osd_client *osdc, |
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 YS |
64 | u64 objoff, objlen; /* extent in object */ |
65 | ||
66 | reqhead->snapid = cpu_to_le64(snapid); | |
67 | ||
68 | /* object extent? */ | |
68b4476b | 69 | ceph_calc_file_object_mapping(layout, off, plen, bno, |
3499e8a5 | 70 | &objoff, &objlen); |
68b4476b | 71 | if (*plen < orig_len) |
3499e8a5 | 72 | dout(" skipping last %llu, final file extent %llu~%llu\n", |
68b4476b | 73 | orig_len - *plen, off, *plen); |
3499e8a5 | 74 | |
68b4476b YS |
75 | if (op_has_extent(op->op)) { |
76 | op->extent.offset = objoff; | |
77 | op->extent.length = objlen; | |
78 | } | |
79 | req->r_num_pages = calc_pages_for(off, *plen); | |
b7495fc2 | 80 | req->r_page_alignment = off & ~PAGE_MASK; |
3d14c5d2 YS |
81 | if (op->op == CEPH_OSD_OP_WRITE) |
82 | op->payload_len = *plen; | |
3499e8a5 YS |
83 | |
84 | dout("calc_layout bno=%llx %llu~%llu (%d pages)\n", | |
85 | *bno, objoff, objlen, req->r_num_pages); | |
86 | ||
87 | } | |
3d14c5d2 | 88 | EXPORT_SYMBOL(ceph_calc_raw_layout); |
3499e8a5 | 89 | |
f24e9980 SW |
90 | /* |
91 | * Implement client access to distributed object storage cluster. | |
92 | * | |
93 | * All data objects are stored within a cluster/cloud of OSDs, or | |
94 | * "object storage devices." (Note that Ceph OSDs have _nothing_ to | |
95 | * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply | |
96 | * remote daemons serving up and coordinating consistent and safe | |
97 | * access to storage. | |
98 | * | |
99 | * Cluster membership and the mapping of data objects onto storage devices | |
100 | * are described by the osd map. | |
101 | * | |
102 | * We keep track of pending OSD requests (read, write), resubmit | |
103 | * requests to different OSDs when the cluster topology/data layout | |
104 | * change, or retry the affected requests when the communications | |
105 | * channel with an OSD is reset. | |
106 | */ | |
107 | ||
108 | /* | |
109 | * calculate the mapping of a file extent onto an object, and fill out the | |
110 | * request accordingly. shorten extent as necessary if it crosses an | |
111 | * object boundary. | |
112 | * | |
113 | * fill osd op in request message. | |
114 | */ | |
115 | static void calc_layout(struct ceph_osd_client *osdc, | |
3499e8a5 YS |
116 | struct ceph_vino vino, |
117 | struct ceph_file_layout *layout, | |
f24e9980 | 118 | u64 off, u64 *plen, |
68b4476b YS |
119 | struct ceph_osd_request *req, |
120 | struct ceph_osd_req_op *op) | |
f24e9980 | 121 | { |
f24e9980 SW |
122 | u64 bno; |
123 | ||
68b4476b YS |
124 | ceph_calc_raw_layout(osdc, layout, vino.snap, off, |
125 | plen, &bno, req, op); | |
f24e9980 | 126 | |
2dab036b | 127 | snprintf(req->r_oid, sizeof(req->r_oid), "%llx.%08llx", vino.ino, bno); |
f24e9980 | 128 | req->r_oid_len = strlen(req->r_oid); |
f24e9980 SW |
129 | } |
130 | ||
f24e9980 SW |
131 | /* |
132 | * requests | |
133 | */ | |
415e49a9 | 134 | void ceph_osdc_release_request(struct kref *kref) |
f24e9980 | 135 | { |
415e49a9 SW |
136 | struct ceph_osd_request *req = container_of(kref, |
137 | struct ceph_osd_request, | |
138 | r_kref); | |
139 | ||
140 | if (req->r_request) | |
141 | ceph_msg_put(req->r_request); | |
142 | if (req->r_reply) | |
143 | ceph_msg_put(req->r_reply); | |
0d59ab81 | 144 | if (req->r_con_filling_msg) { |
350b1c32 | 145 | dout("release_request revoking pages %p from con %p\n", |
0d59ab81 YS |
146 | req->r_pages, req->r_con_filling_msg); |
147 | ceph_con_revoke_message(req->r_con_filling_msg, | |
148 | req->r_reply); | |
149 | ceph_con_put(req->r_con_filling_msg); | |
350b1c32 | 150 | } |
415e49a9 SW |
151 | if (req->r_own_pages) |
152 | ceph_release_page_vector(req->r_pages, | |
153 | req->r_num_pages); | |
68b4476b YS |
154 | #ifdef CONFIG_BLOCK |
155 | if (req->r_bio) | |
156 | bio_put(req->r_bio); | |
157 | #endif | |
415e49a9 | 158 | ceph_put_snap_context(req->r_snapc); |
68b4476b YS |
159 | if (req->r_trail) { |
160 | ceph_pagelist_release(req->r_trail); | |
161 | kfree(req->r_trail); | |
162 | } | |
415e49a9 SW |
163 | if (req->r_mempool) |
164 | mempool_free(req, req->r_osdc->req_mempool); | |
165 | else | |
166 | kfree(req); | |
f24e9980 | 167 | } |
3d14c5d2 | 168 | EXPORT_SYMBOL(ceph_osdc_release_request); |
68b4476b YS |
169 | |
170 | static int get_num_ops(struct ceph_osd_req_op *ops, int *needs_trail) | |
171 | { | |
172 | int i = 0; | |
173 | ||
174 | if (needs_trail) | |
175 | *needs_trail = 0; | |
176 | while (ops[i].op) { | |
177 | if (needs_trail && op_needs_trail(ops[i].op)) | |
178 | *needs_trail = 1; | |
179 | i++; | |
180 | } | |
181 | ||
182 | return i; | |
183 | } | |
184 | ||
3499e8a5 YS |
185 | struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, |
186 | int flags, | |
f24e9980 | 187 | struct ceph_snap_context *snapc, |
68b4476b | 188 | struct ceph_osd_req_op *ops, |
3499e8a5 YS |
189 | bool use_mempool, |
190 | gfp_t gfp_flags, | |
68b4476b YS |
191 | struct page **pages, |
192 | struct bio *bio) | |
f24e9980 SW |
193 | { |
194 | struct ceph_osd_request *req; | |
195 | struct ceph_msg *msg; | |
68b4476b YS |
196 | int needs_trail; |
197 | int num_op = get_num_ops(ops, &needs_trail); | |
198 | size_t msg_size = sizeof(struct ceph_osd_request_head); | |
3499e8a5 | 199 | |
68b4476b | 200 | msg_size += num_op*sizeof(struct ceph_osd_op); |
f24e9980 SW |
201 | |
202 | if (use_mempool) { | |
3499e8a5 | 203 | req = mempool_alloc(osdc->req_mempool, gfp_flags); |
f24e9980 SW |
204 | memset(req, 0, sizeof(*req)); |
205 | } else { | |
3499e8a5 | 206 | req = kzalloc(sizeof(*req), gfp_flags); |
f24e9980 SW |
207 | } |
208 | if (req == NULL) | |
a79832f2 | 209 | return NULL; |
f24e9980 | 210 | |
f24e9980 SW |
211 | req->r_osdc = osdc; |
212 | req->r_mempool = use_mempool; | |
68b4476b | 213 | |
415e49a9 | 214 | kref_init(&req->r_kref); |
f24e9980 SW |
215 | init_completion(&req->r_completion); |
216 | init_completion(&req->r_safe_completion); | |
217 | INIT_LIST_HEAD(&req->r_unsafe_item); | |
a40c4f10 YS |
218 | INIT_LIST_HEAD(&req->r_linger_item); |
219 | INIT_LIST_HEAD(&req->r_linger_osd); | |
f24e9980 SW |
220 | req->r_flags = flags; |
221 | ||
222 | WARN_ON((flags & (CEPH_OSD_FLAG_READ|CEPH_OSD_FLAG_WRITE)) == 0); | |
223 | ||
c16e7869 SW |
224 | /* create reply message */ |
225 | if (use_mempool) | |
226 | msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); | |
227 | else | |
228 | msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, | |
3499e8a5 | 229 | OSD_OPREPLY_FRONT_LEN, gfp_flags); |
a79832f2 | 230 | if (!msg) { |
c16e7869 | 231 | ceph_osdc_put_request(req); |
a79832f2 | 232 | return NULL; |
c16e7869 SW |
233 | } |
234 | req->r_reply = msg; | |
235 | ||
68b4476b YS |
236 | /* allocate space for the trailing data */ |
237 | if (needs_trail) { | |
238 | req->r_trail = kmalloc(sizeof(struct ceph_pagelist), gfp_flags); | |
239 | if (!req->r_trail) { | |
240 | ceph_osdc_put_request(req); | |
241 | return NULL; | |
242 | } | |
243 | ceph_pagelist_init(req->r_trail); | |
244 | } | |
c16e7869 | 245 | /* create request message; allow space for oid */ |
f24e9980 SW |
246 | msg_size += 40; |
247 | if (snapc) | |
248 | msg_size += sizeof(u64) * snapc->num_snaps; | |
249 | if (use_mempool) | |
8f3bc053 | 250 | msg = ceph_msgpool_get(&osdc->msgpool_op, 0); |
f24e9980 | 251 | else |
3499e8a5 | 252 | msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags); |
a79832f2 | 253 | if (!msg) { |
f24e9980 | 254 | ceph_osdc_put_request(req); |
a79832f2 | 255 | return NULL; |
f24e9980 | 256 | } |
68b4476b | 257 | |
f24e9980 SW |
258 | msg->hdr.type = cpu_to_le16(CEPH_MSG_OSD_OP); |
259 | memset(msg->front.iov_base, 0, msg->front.iov_len); | |
3499e8a5 YS |
260 | |
261 | req->r_request = msg; | |
262 | req->r_pages = pages; | |
68b4476b YS |
263 | #ifdef CONFIG_BLOCK |
264 | if (bio) { | |
265 | req->r_bio = bio; | |
266 | bio_get(req->r_bio); | |
267 | } | |
268 | #endif | |
3499e8a5 YS |
269 | |
270 | return req; | |
271 | } | |
3d14c5d2 | 272 | EXPORT_SYMBOL(ceph_osdc_alloc_request); |
3499e8a5 | 273 | |
68b4476b YS |
274 | static void osd_req_encode_op(struct ceph_osd_request *req, |
275 | struct ceph_osd_op *dst, | |
276 | struct ceph_osd_req_op *src) | |
277 | { | |
278 | dst->op = cpu_to_le16(src->op); | |
279 | ||
280 | switch (dst->op) { | |
281 | case CEPH_OSD_OP_READ: | |
282 | case CEPH_OSD_OP_WRITE: | |
283 | dst->extent.offset = | |
284 | cpu_to_le64(src->extent.offset); | |
285 | dst->extent.length = | |
286 | cpu_to_le64(src->extent.length); | |
287 | dst->extent.truncate_size = | |
288 | cpu_to_le64(src->extent.truncate_size); | |
289 | dst->extent.truncate_seq = | |
290 | cpu_to_le32(src->extent.truncate_seq); | |
291 | break; | |
292 | ||
293 | case CEPH_OSD_OP_GETXATTR: | |
294 | case CEPH_OSD_OP_SETXATTR: | |
295 | case CEPH_OSD_OP_CMPXATTR: | |
296 | BUG_ON(!req->r_trail); | |
297 | ||
298 | dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); | |
299 | dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); | |
300 | dst->xattr.cmp_op = src->xattr.cmp_op; | |
301 | dst->xattr.cmp_mode = src->xattr.cmp_mode; | |
302 | ceph_pagelist_append(req->r_trail, src->xattr.name, | |
303 | src->xattr.name_len); | |
304 | ceph_pagelist_append(req->r_trail, src->xattr.val, | |
305 | src->xattr.value_len); | |
306 | break; | |
ae1533b6 YS |
307 | case CEPH_OSD_OP_CALL: |
308 | BUG_ON(!req->r_trail); | |
309 | ||
310 | dst->cls.class_len = src->cls.class_len; | |
311 | dst->cls.method_len = src->cls.method_len; | |
312 | dst->cls.indata_len = cpu_to_le32(src->cls.indata_len); | |
313 | ||
314 | ceph_pagelist_append(req->r_trail, src->cls.class_name, | |
315 | src->cls.class_len); | |
316 | ceph_pagelist_append(req->r_trail, src->cls.method_name, | |
317 | src->cls.method_len); | |
318 | ceph_pagelist_append(req->r_trail, src->cls.indata, | |
319 | src->cls.indata_len); | |
320 | break; | |
321 | case CEPH_OSD_OP_ROLLBACK: | |
322 | dst->snap.snapid = cpu_to_le64(src->snap.snapid); | |
323 | break; | |
68b4476b YS |
324 | case CEPH_OSD_OP_STARTSYNC: |
325 | break; | |
a40c4f10 YS |
326 | case CEPH_OSD_OP_NOTIFY: |
327 | { | |
328 | __le32 prot_ver = cpu_to_le32(src->watch.prot_ver); | |
329 | __le32 timeout = cpu_to_le32(src->watch.timeout); | |
330 | ||
331 | BUG_ON(!req->r_trail); | |
332 | ||
333 | ceph_pagelist_append(req->r_trail, | |
334 | &prot_ver, sizeof(prot_ver)); | |
335 | ceph_pagelist_append(req->r_trail, | |
336 | &timeout, sizeof(timeout)); | |
337 | } | |
338 | case CEPH_OSD_OP_NOTIFY_ACK: | |
339 | case CEPH_OSD_OP_WATCH: | |
340 | dst->watch.cookie = cpu_to_le64(src->watch.cookie); | |
341 | dst->watch.ver = cpu_to_le64(src->watch.ver); | |
342 | dst->watch.flag = src->watch.flag; | |
343 | break; | |
68b4476b YS |
344 | default: |
345 | pr_err("unrecognized osd opcode %d\n", dst->op); | |
346 | WARN_ON(1); | |
347 | break; | |
348 | } | |
349 | dst->payload_len = cpu_to_le32(src->payload_len); | |
350 | } | |
351 | ||
3499e8a5 YS |
352 | /* |
353 | * build new request AND message | |
354 | * | |
355 | */ | |
356 | void ceph_osdc_build_request(struct ceph_osd_request *req, | |
68b4476b YS |
357 | u64 off, u64 *plen, |
358 | struct ceph_osd_req_op *src_ops, | |
359 | struct ceph_snap_context *snapc, | |
360 | struct timespec *mtime, | |
361 | const char *oid, | |
362 | int oid_len) | |
3499e8a5 YS |
363 | { |
364 | struct ceph_msg *msg = req->r_request; | |
365 | struct ceph_osd_request_head *head; | |
68b4476b | 366 | struct ceph_osd_req_op *src_op; |
3499e8a5 YS |
367 | struct ceph_osd_op *op; |
368 | void *p; | |
68b4476b | 369 | int num_op = get_num_ops(src_ops, NULL); |
3499e8a5 | 370 | size_t msg_size = sizeof(*head) + num_op*sizeof(*op); |
3499e8a5 | 371 | int flags = req->r_flags; |
68b4476b YS |
372 | u64 data_len = 0; |
373 | int i; | |
3499e8a5 | 374 | |
f24e9980 SW |
375 | head = msg->front.iov_base; |
376 | op = (void *)(head + 1); | |
377 | p = (void *)(op + num_op); | |
378 | ||
f24e9980 SW |
379 | req->r_snapc = ceph_get_snap_context(snapc); |
380 | ||
381 | head->client_inc = cpu_to_le32(1); /* always, for now. */ | |
382 | head->flags = cpu_to_le32(flags); | |
383 | if (flags & CEPH_OSD_FLAG_WRITE) | |
384 | ceph_encode_timespec(&head->mtime, mtime); | |
385 | head->num_ops = cpu_to_le16(num_op); | |
f24e9980 | 386 | |
f24e9980 SW |
387 | |
388 | /* fill in oid */ | |
3499e8a5 YS |
389 | head->object_len = cpu_to_le32(oid_len); |
390 | memcpy(p, oid, oid_len); | |
391 | p += oid_len; | |
f24e9980 | 392 | |
68b4476b YS |
393 | src_op = src_ops; |
394 | while (src_op->op) { | |
395 | osd_req_encode_op(req, op, src_op); | |
396 | src_op++; | |
f24e9980 | 397 | op++; |
f24e9980 | 398 | } |
68b4476b YS |
399 | |
400 | if (req->r_trail) | |
401 | data_len += req->r_trail->length; | |
402 | ||
f24e9980 SW |
403 | if (snapc) { |
404 | head->snap_seq = cpu_to_le64(snapc->seq); | |
405 | head->num_snaps = cpu_to_le32(snapc->num_snaps); | |
406 | for (i = 0; i < snapc->num_snaps; i++) { | |
407 | put_unaligned_le64(snapc->snaps[i], p); | |
408 | p += sizeof(u64); | |
409 | } | |
410 | } | |
411 | ||
68b4476b YS |
412 | if (flags & CEPH_OSD_FLAG_WRITE) { |
413 | req->r_request->hdr.data_off = cpu_to_le16(off); | |
414 | req->r_request->hdr.data_len = cpu_to_le32(*plen + data_len); | |
415 | } else if (data_len) { | |
416 | req->r_request->hdr.data_off = 0; | |
417 | req->r_request->hdr.data_len = cpu_to_le32(data_len); | |
418 | } | |
419 | ||
c5c6b19d SW |
420 | req->r_request->page_alignment = req->r_page_alignment; |
421 | ||
f24e9980 | 422 | BUG_ON(p > msg->front.iov_base + msg->front.iov_len); |
6f863e71 SW |
423 | msg_size = p - msg->front.iov_base; |
424 | msg->front.iov_len = msg_size; | |
425 | msg->hdr.front_len = cpu_to_le32(msg_size); | |
3499e8a5 YS |
426 | return; |
427 | } | |
3d14c5d2 | 428 | EXPORT_SYMBOL(ceph_osdc_build_request); |
3499e8a5 YS |
429 | |
430 | /* | |
431 | * build new request AND message, calculate layout, and adjust file | |
432 | * extent as needed. | |
433 | * | |
434 | * if the file was recently truncated, we include information about its | |
435 | * old and new size so that the object can be updated appropriately. (we | |
436 | * avoid synchronously deleting truncated objects because it's slow.) | |
437 | * | |
438 | * if @do_sync, include a 'startsync' command so that the osd will flush | |
439 | * data quickly. | |
440 | */ | |
441 | struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, | |
442 | struct ceph_file_layout *layout, | |
443 | struct ceph_vino vino, | |
444 | u64 off, u64 *plen, | |
445 | int opcode, int flags, | |
446 | struct ceph_snap_context *snapc, | |
447 | int do_sync, | |
448 | u32 truncate_seq, | |
449 | u64 truncate_size, | |
450 | struct timespec *mtime, | |
b7495fc2 SW |
451 | bool use_mempool, int num_reply, |
452 | int page_align) | |
3499e8a5 | 453 | { |
68b4476b YS |
454 | struct ceph_osd_req_op ops[3]; |
455 | struct ceph_osd_request *req; | |
456 | ||
457 | ops[0].op = opcode; | |
458 | ops[0].extent.truncate_seq = truncate_seq; | |
459 | ops[0].extent.truncate_size = truncate_size; | |
460 | ops[0].payload_len = 0; | |
461 | ||
462 | if (do_sync) { | |
463 | ops[1].op = CEPH_OSD_OP_STARTSYNC; | |
464 | ops[1].payload_len = 0; | |
465 | ops[2].op = 0; | |
466 | } else | |
467 | ops[1].op = 0; | |
468 | ||
469 | req = ceph_osdc_alloc_request(osdc, flags, | |
470 | snapc, ops, | |
3499e8a5 | 471 | use_mempool, |
68b4476b | 472 | GFP_NOFS, NULL, NULL); |
4ad12621 SW |
473 | if (!req) |
474 | return NULL; | |
3499e8a5 YS |
475 | |
476 | /* calculate max write size */ | |
68b4476b | 477 | calc_layout(osdc, vino, layout, off, plen, req, ops); |
3499e8a5 YS |
478 | req->r_file_layout = *layout; /* keep a copy */ |
479 | ||
9bb0ce2b SW |
480 | /* in case it differs from natural (file) alignment that |
481 | calc_layout filled in for us */ | |
482 | req->r_num_pages = calc_pages_for(page_align, *plen); | |
b7495fc2 SW |
483 | req->r_page_alignment = page_align; |
484 | ||
68b4476b YS |
485 | ceph_osdc_build_request(req, off, plen, ops, |
486 | snapc, | |
3499e8a5 YS |
487 | mtime, |
488 | req->r_oid, req->r_oid_len); | |
489 | ||
f24e9980 SW |
490 | return req; |
491 | } | |
3d14c5d2 | 492 | EXPORT_SYMBOL(ceph_osdc_new_request); |
f24e9980 SW |
493 | |
494 | /* | |
495 | * We keep osd requests in an rbtree, sorted by ->r_tid. | |
496 | */ | |
497 | static void __insert_request(struct ceph_osd_client *osdc, | |
498 | struct ceph_osd_request *new) | |
499 | { | |
500 | struct rb_node **p = &osdc->requests.rb_node; | |
501 | struct rb_node *parent = NULL; | |
502 | struct ceph_osd_request *req = NULL; | |
503 | ||
504 | while (*p) { | |
505 | parent = *p; | |
506 | req = rb_entry(parent, struct ceph_osd_request, r_node); | |
507 | if (new->r_tid < req->r_tid) | |
508 | p = &(*p)->rb_left; | |
509 | else if (new->r_tid > req->r_tid) | |
510 | p = &(*p)->rb_right; | |
511 | else | |
512 | BUG(); | |
513 | } | |
514 | ||
515 | rb_link_node(&new->r_node, parent, p); | |
516 | rb_insert_color(&new->r_node, &osdc->requests); | |
517 | } | |
518 | ||
519 | static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc, | |
520 | u64 tid) | |
521 | { | |
522 | struct ceph_osd_request *req; | |
523 | struct rb_node *n = osdc->requests.rb_node; | |
524 | ||
525 | while (n) { | |
526 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
527 | if (tid < req->r_tid) | |
528 | n = n->rb_left; | |
529 | else if (tid > req->r_tid) | |
530 | n = n->rb_right; | |
531 | else | |
532 | return req; | |
533 | } | |
534 | return NULL; | |
535 | } | |
536 | ||
537 | static struct ceph_osd_request * | |
538 | __lookup_request_ge(struct ceph_osd_client *osdc, | |
539 | u64 tid) | |
540 | { | |
541 | struct ceph_osd_request *req; | |
542 | struct rb_node *n = osdc->requests.rb_node; | |
543 | ||
544 | while (n) { | |
545 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
546 | if (tid < req->r_tid) { | |
547 | if (!n->rb_left) | |
548 | return req; | |
549 | n = n->rb_left; | |
550 | } else if (tid > req->r_tid) { | |
551 | n = n->rb_right; | |
552 | } else { | |
553 | return req; | |
554 | } | |
555 | } | |
556 | return NULL; | |
557 | } | |
558 | ||
6f6c7006 SW |
559 | /* |
560 | * Resubmit requests pending on the given osd. | |
561 | */ | |
562 | static void __kick_osd_requests(struct ceph_osd_client *osdc, | |
563 | struct ceph_osd *osd) | |
564 | { | |
a40c4f10 | 565 | struct ceph_osd_request *req, *nreq; |
6f6c7006 SW |
566 | int err; |
567 | ||
568 | dout("__kick_osd_requests osd%d\n", osd->o_osd); | |
569 | err = __reset_osd(osdc, osd); | |
570 | if (err == -EAGAIN) | |
571 | return; | |
572 | ||
573 | list_for_each_entry(req, &osd->o_requests, r_osd_item) { | |
574 | list_move(&req->r_req_lru_item, &osdc->req_unsent); | |
575 | dout("requeued %p tid %llu osd%d\n", req, req->r_tid, | |
576 | osd->o_osd); | |
a40c4f10 YS |
577 | if (!req->r_linger) |
578 | req->r_flags |= CEPH_OSD_FLAG_RETRY; | |
579 | } | |
580 | ||
581 | list_for_each_entry_safe(req, nreq, &osd->o_linger_requests, | |
582 | r_linger_osd) { | |
77f38e0e SW |
583 | /* |
584 | * reregister request prior to unregistering linger so | |
585 | * that r_osd is preserved. | |
586 | */ | |
587 | BUG_ON(!list_empty(&req->r_req_lru_item)); | |
a40c4f10 | 588 | __register_request(osdc, req); |
77f38e0e SW |
589 | list_add(&req->r_req_lru_item, &osdc->req_unsent); |
590 | list_add(&req->r_osd_item, &req->r_osd->o_requests); | |
591 | __unregister_linger_request(osdc, req); | |
a40c4f10 YS |
592 | dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid, |
593 | osd->o_osd); | |
6f6c7006 SW |
594 | } |
595 | } | |
596 | ||
597 | static void kick_osd_requests(struct ceph_osd_client *osdc, | |
598 | struct ceph_osd *kickosd) | |
599 | { | |
600 | mutex_lock(&osdc->request_mutex); | |
601 | __kick_osd_requests(osdc, kickosd); | |
602 | mutex_unlock(&osdc->request_mutex); | |
603 | } | |
f24e9980 SW |
604 | |
605 | /* | |
81b024e7 | 606 | * If the osd connection drops, we need to resubmit all requests. |
f24e9980 SW |
607 | */ |
608 | static void osd_reset(struct ceph_connection *con) | |
609 | { | |
610 | struct ceph_osd *osd = con->private; | |
611 | struct ceph_osd_client *osdc; | |
612 | ||
613 | if (!osd) | |
614 | return; | |
615 | dout("osd_reset osd%d\n", osd->o_osd); | |
616 | osdc = osd->o_osdc; | |
f24e9980 | 617 | down_read(&osdc->map_sem); |
6f6c7006 SW |
618 | kick_osd_requests(osdc, osd); |
619 | send_queued(osdc); | |
f24e9980 SW |
620 | up_read(&osdc->map_sem); |
621 | } | |
622 | ||
623 | /* | |
624 | * Track open sessions with osds. | |
625 | */ | |
626 | static struct ceph_osd *create_osd(struct ceph_osd_client *osdc) | |
627 | { | |
628 | struct ceph_osd *osd; | |
629 | ||
630 | osd = kzalloc(sizeof(*osd), GFP_NOFS); | |
631 | if (!osd) | |
632 | return NULL; | |
633 | ||
634 | atomic_set(&osd->o_ref, 1); | |
635 | osd->o_osdc = osdc; | |
636 | INIT_LIST_HEAD(&osd->o_requests); | |
a40c4f10 | 637 | INIT_LIST_HEAD(&osd->o_linger_requests); |
f5a2041b | 638 | INIT_LIST_HEAD(&osd->o_osd_lru); |
f24e9980 SW |
639 | osd->o_incarnation = 1; |
640 | ||
641 | ceph_con_init(osdc->client->msgr, &osd->o_con); | |
642 | osd->o_con.private = osd; | |
643 | osd->o_con.ops = &osd_con_ops; | |
644 | osd->o_con.peer_name.type = CEPH_ENTITY_TYPE_OSD; | |
4e7a5dcd | 645 | |
422d2cb8 | 646 | INIT_LIST_HEAD(&osd->o_keepalive_item); |
f24e9980 SW |
647 | return osd; |
648 | } | |
649 | ||
650 | static struct ceph_osd *get_osd(struct ceph_osd *osd) | |
651 | { | |
652 | if (atomic_inc_not_zero(&osd->o_ref)) { | |
653 | dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1, | |
654 | atomic_read(&osd->o_ref)); | |
655 | return osd; | |
656 | } else { | |
657 | dout("get_osd %p FAIL\n", osd); | |
658 | return NULL; | |
659 | } | |
660 | } | |
661 | ||
662 | static void put_osd(struct ceph_osd *osd) | |
663 | { | |
664 | dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref), | |
665 | atomic_read(&osd->o_ref) - 1); | |
79494d1b SW |
666 | if (atomic_dec_and_test(&osd->o_ref)) { |
667 | struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth; | |
668 | ||
669 | if (osd->o_authorizer) | |
670 | ac->ops->destroy_authorizer(ac, osd->o_authorizer); | |
f24e9980 | 671 | kfree(osd); |
79494d1b | 672 | } |
f24e9980 SW |
673 | } |
674 | ||
675 | /* | |
676 | * remove an osd from our map | |
677 | */ | |
f5a2041b | 678 | static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) |
f24e9980 | 679 | { |
f5a2041b | 680 | dout("__remove_osd %p\n", osd); |
f24e9980 SW |
681 | BUG_ON(!list_empty(&osd->o_requests)); |
682 | rb_erase(&osd->o_node, &osdc->osds); | |
f5a2041b | 683 | list_del_init(&osd->o_osd_lru); |
f24e9980 SW |
684 | ceph_con_close(&osd->o_con); |
685 | put_osd(osd); | |
686 | } | |
687 | ||
f5a2041b YS |
688 | static void __move_osd_to_lru(struct ceph_osd_client *osdc, |
689 | struct ceph_osd *osd) | |
690 | { | |
691 | dout("__move_osd_to_lru %p\n", osd); | |
692 | BUG_ON(!list_empty(&osd->o_osd_lru)); | |
693 | list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); | |
3d14c5d2 | 694 | osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ; |
f5a2041b YS |
695 | } |
696 | ||
697 | static void __remove_osd_from_lru(struct ceph_osd *osd) | |
698 | { | |
699 | dout("__remove_osd_from_lru %p\n", osd); | |
700 | if (!list_empty(&osd->o_osd_lru)) | |
701 | list_del_init(&osd->o_osd_lru); | |
702 | } | |
703 | ||
704 | static void remove_old_osds(struct ceph_osd_client *osdc, int remove_all) | |
705 | { | |
706 | struct ceph_osd *osd, *nosd; | |
707 | ||
708 | dout("__remove_old_osds %p\n", osdc); | |
709 | mutex_lock(&osdc->request_mutex); | |
710 | list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { | |
711 | if (!remove_all && time_before(jiffies, osd->lru_ttl)) | |
712 | break; | |
713 | __remove_osd(osdc, osd); | |
714 | } | |
715 | mutex_unlock(&osdc->request_mutex); | |
716 | } | |
717 | ||
f24e9980 SW |
718 | /* |
719 | * reset osd connect | |
720 | */ | |
f5a2041b | 721 | static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) |
f24e9980 | 722 | { |
87b315a5 | 723 | struct ceph_osd_request *req; |
f24e9980 SW |
724 | int ret = 0; |
725 | ||
f5a2041b | 726 | dout("__reset_osd %p osd%d\n", osd, osd->o_osd); |
a40c4f10 YS |
727 | if (list_empty(&osd->o_requests) && |
728 | list_empty(&osd->o_linger_requests)) { | |
f5a2041b | 729 | __remove_osd(osdc, osd); |
87b315a5 SW |
730 | } else if (memcmp(&osdc->osdmap->osd_addr[osd->o_osd], |
731 | &osd->o_con.peer_addr, | |
732 | sizeof(osd->o_con.peer_addr)) == 0 && | |
733 | !ceph_con_opened(&osd->o_con)) { | |
734 | dout(" osd addr hasn't changed and connection never opened," | |
735 | " letting msgr retry"); | |
736 | /* touch each r_stamp for handle_timeout()'s benfit */ | |
737 | list_for_each_entry(req, &osd->o_requests, r_osd_item) | |
738 | req->r_stamp = jiffies; | |
739 | ret = -EAGAIN; | |
f24e9980 SW |
740 | } else { |
741 | ceph_con_close(&osd->o_con); | |
742 | ceph_con_open(&osd->o_con, &osdc->osdmap->osd_addr[osd->o_osd]); | |
743 | osd->o_incarnation++; | |
744 | } | |
745 | return ret; | |
746 | } | |
747 | ||
748 | static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new) | |
749 | { | |
750 | struct rb_node **p = &osdc->osds.rb_node; | |
751 | struct rb_node *parent = NULL; | |
752 | struct ceph_osd *osd = NULL; | |
753 | ||
754 | while (*p) { | |
755 | parent = *p; | |
756 | osd = rb_entry(parent, struct ceph_osd, o_node); | |
757 | if (new->o_osd < osd->o_osd) | |
758 | p = &(*p)->rb_left; | |
759 | else if (new->o_osd > osd->o_osd) | |
760 | p = &(*p)->rb_right; | |
761 | else | |
762 | BUG(); | |
763 | } | |
764 | ||
765 | rb_link_node(&new->o_node, parent, p); | |
766 | rb_insert_color(&new->o_node, &osdc->osds); | |
767 | } | |
768 | ||
769 | static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o) | |
770 | { | |
771 | struct ceph_osd *osd; | |
772 | struct rb_node *n = osdc->osds.rb_node; | |
773 | ||
774 | while (n) { | |
775 | osd = rb_entry(n, struct ceph_osd, o_node); | |
776 | if (o < osd->o_osd) | |
777 | n = n->rb_left; | |
778 | else if (o > osd->o_osd) | |
779 | n = n->rb_right; | |
780 | else | |
781 | return osd; | |
782 | } | |
783 | return NULL; | |
784 | } | |
785 | ||
422d2cb8 YS |
786 | static void __schedule_osd_timeout(struct ceph_osd_client *osdc) |
787 | { | |
788 | schedule_delayed_work(&osdc->timeout_work, | |
3d14c5d2 | 789 | osdc->client->options->osd_keepalive_timeout * HZ); |
422d2cb8 YS |
790 | } |
791 | ||
792 | static void __cancel_osd_timeout(struct ceph_osd_client *osdc) | |
793 | { | |
794 | cancel_delayed_work(&osdc->timeout_work); | |
795 | } | |
f24e9980 SW |
796 | |
797 | /* | |
798 | * Register request, assign tid. If this is the first request, set up | |
799 | * the timeout event. | |
800 | */ | |
a40c4f10 YS |
801 | static void __register_request(struct ceph_osd_client *osdc, |
802 | struct ceph_osd_request *req) | |
f24e9980 | 803 | { |
f24e9980 | 804 | req->r_tid = ++osdc->last_tid; |
6df058c0 | 805 | req->r_request->hdr.tid = cpu_to_le64(req->r_tid); |
422d2cb8 | 806 | INIT_LIST_HEAD(&req->r_req_lru_item); |
f24e9980 | 807 | |
77f38e0e | 808 | dout("__register_request %p tid %lld\n", req, req->r_tid); |
f24e9980 SW |
809 | __insert_request(osdc, req); |
810 | ceph_osdc_get_request(req); | |
811 | osdc->num_requests++; | |
812 | ||
f24e9980 | 813 | if (osdc->num_requests == 1) { |
422d2cb8 YS |
814 | dout(" first request, scheduling timeout\n"); |
815 | __schedule_osd_timeout(osdc); | |
f24e9980 | 816 | } |
a40c4f10 YS |
817 | } |
818 | ||
819 | static void register_request(struct ceph_osd_client *osdc, | |
820 | struct ceph_osd_request *req) | |
821 | { | |
822 | mutex_lock(&osdc->request_mutex); | |
823 | __register_request(osdc, req); | |
f24e9980 SW |
824 | mutex_unlock(&osdc->request_mutex); |
825 | } | |
826 | ||
827 | /* | |
828 | * called under osdc->request_mutex | |
829 | */ | |
830 | static void __unregister_request(struct ceph_osd_client *osdc, | |
831 | struct ceph_osd_request *req) | |
832 | { | |
833 | dout("__unregister_request %p tid %lld\n", req, req->r_tid); | |
834 | rb_erase(&req->r_node, &osdc->requests); | |
835 | osdc->num_requests--; | |
836 | ||
0ba6478d SW |
837 | if (req->r_osd) { |
838 | /* make sure the original request isn't in flight. */ | |
839 | ceph_con_revoke(&req->r_osd->o_con, req->r_request); | |
840 | ||
841 | list_del_init(&req->r_osd_item); | |
a40c4f10 YS |
842 | if (list_empty(&req->r_osd->o_requests) && |
843 | list_empty(&req->r_osd->o_linger_requests)) { | |
844 | dout("moving osd to %p lru\n", req->r_osd); | |
f5a2041b | 845 | __move_osd_to_lru(osdc, req->r_osd); |
a40c4f10 | 846 | } |
fbdb9190 | 847 | if (list_empty(&req->r_linger_item)) |
a40c4f10 | 848 | req->r_osd = NULL; |
0ba6478d | 849 | } |
f24e9980 SW |
850 | |
851 | ceph_osdc_put_request(req); | |
852 | ||
422d2cb8 YS |
853 | list_del_init(&req->r_req_lru_item); |
854 | if (osdc->num_requests == 0) { | |
855 | dout(" no requests, canceling timeout\n"); | |
856 | __cancel_osd_timeout(osdc); | |
f24e9980 SW |
857 | } |
858 | } | |
859 | ||
860 | /* | |
861 | * Cancel a previously queued request message | |
862 | */ | |
863 | static void __cancel_request(struct ceph_osd_request *req) | |
864 | { | |
6bc18876 | 865 | if (req->r_sent && req->r_osd) { |
f24e9980 SW |
866 | ceph_con_revoke(&req->r_osd->o_con, req->r_request); |
867 | req->r_sent = 0; | |
868 | } | |
869 | } | |
870 | ||
a40c4f10 YS |
871 | static void __register_linger_request(struct ceph_osd_client *osdc, |
872 | struct ceph_osd_request *req) | |
873 | { | |
874 | dout("__register_linger_request %p\n", req); | |
875 | list_add_tail(&req->r_linger_item, &osdc->req_linger); | |
876 | list_add_tail(&req->r_linger_osd, &req->r_osd->o_linger_requests); | |
877 | } | |
878 | ||
879 | static void __unregister_linger_request(struct ceph_osd_client *osdc, | |
880 | struct ceph_osd_request *req) | |
881 | { | |
882 | dout("__unregister_linger_request %p\n", req); | |
883 | if (req->r_osd) { | |
884 | list_del_init(&req->r_linger_item); | |
885 | list_del_init(&req->r_linger_osd); | |
886 | ||
887 | if (list_empty(&req->r_osd->o_requests) && | |
888 | list_empty(&req->r_osd->o_linger_requests)) { | |
889 | dout("moving osd to %p lru\n", req->r_osd); | |
890 | __move_osd_to_lru(osdc, req->r_osd); | |
891 | } | |
fbdb9190 SW |
892 | if (list_empty(&req->r_osd_item)) |
893 | req->r_osd = NULL; | |
a40c4f10 YS |
894 | } |
895 | } | |
896 | ||
897 | void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc, | |
898 | struct ceph_osd_request *req) | |
899 | { | |
900 | mutex_lock(&osdc->request_mutex); | |
901 | if (req->r_linger) { | |
902 | __unregister_linger_request(osdc, req); | |
903 | ceph_osdc_put_request(req); | |
904 | } | |
905 | mutex_unlock(&osdc->request_mutex); | |
906 | } | |
907 | EXPORT_SYMBOL(ceph_osdc_unregister_linger_request); | |
908 | ||
909 | void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc, | |
910 | struct ceph_osd_request *req) | |
911 | { | |
912 | if (!req->r_linger) { | |
913 | dout("set_request_linger %p\n", req); | |
914 | req->r_linger = 1; | |
915 | /* | |
916 | * caller is now responsible for calling | |
917 | * unregister_linger_request | |
918 | */ | |
919 | ceph_osdc_get_request(req); | |
920 | } | |
921 | } | |
922 | EXPORT_SYMBOL(ceph_osdc_set_request_linger); | |
923 | ||
f24e9980 SW |
924 | /* |
925 | * Pick an osd (the first 'up' osd in the pg), allocate the osd struct | |
926 | * (as needed), and set the request r_osd appropriately. If there is | |
25985edc | 927 | * no up osd, set r_osd to NULL. Move the request to the appropriate list |
6f6c7006 | 928 | * (unsent, homeless) or leave on in-flight lru. |
f24e9980 SW |
929 | * |
930 | * Return 0 if unchanged, 1 if changed, or negative on error. | |
931 | * | |
932 | * Caller should hold map_sem for read and request_mutex. | |
933 | */ | |
6f6c7006 SW |
934 | static int __map_request(struct ceph_osd_client *osdc, |
935 | struct ceph_osd_request *req) | |
f24e9980 SW |
936 | { |
937 | struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base; | |
51042122 | 938 | struct ceph_pg pgid; |
d85b7056 SW |
939 | int acting[CEPH_PG_MAX_SIZE]; |
940 | int o = -1, num = 0; | |
f24e9980 | 941 | int err; |
f24e9980 | 942 | |
6f6c7006 | 943 | dout("map_request %p tid %lld\n", req, req->r_tid); |
f24e9980 SW |
944 | err = ceph_calc_object_layout(&reqhead->layout, req->r_oid, |
945 | &req->r_file_layout, osdc->osdmap); | |
6f6c7006 SW |
946 | if (err) { |
947 | list_move(&req->r_req_lru_item, &osdc->req_notarget); | |
f24e9980 | 948 | return err; |
6f6c7006 | 949 | } |
51042122 | 950 | pgid = reqhead->layout.ol_pgid; |
7740a42f SW |
951 | req->r_pgid = pgid; |
952 | ||
d85b7056 SW |
953 | err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting); |
954 | if (err > 0) { | |
955 | o = acting[0]; | |
956 | num = err; | |
957 | } | |
f24e9980 SW |
958 | |
959 | if ((req->r_osd && req->r_osd->o_osd == o && | |
d85b7056 SW |
960 | req->r_sent >= req->r_osd->o_incarnation && |
961 | req->r_num_pg_osds == num && | |
962 | memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) || | |
f24e9980 SW |
963 | (req->r_osd == NULL && o == -1)) |
964 | return 0; /* no change */ | |
965 | ||
6f6c7006 | 966 | dout("map_request tid %llu pgid %d.%x osd%d (was osd%d)\n", |
51042122 | 967 | req->r_tid, le32_to_cpu(pgid.pool), le16_to_cpu(pgid.ps), o, |
f24e9980 SW |
968 | req->r_osd ? req->r_osd->o_osd : -1); |
969 | ||
d85b7056 SW |
970 | /* record full pg acting set */ |
971 | memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num); | |
972 | req->r_num_pg_osds = num; | |
973 | ||
f24e9980 SW |
974 | if (req->r_osd) { |
975 | __cancel_request(req); | |
976 | list_del_init(&req->r_osd_item); | |
f24e9980 SW |
977 | req->r_osd = NULL; |
978 | } | |
979 | ||
980 | req->r_osd = __lookup_osd(osdc, o); | |
981 | if (!req->r_osd && o >= 0) { | |
c99eb1c7 SW |
982 | err = -ENOMEM; |
983 | req->r_osd = create_osd(osdc); | |
6f6c7006 SW |
984 | if (!req->r_osd) { |
985 | list_move(&req->r_req_lru_item, &osdc->req_notarget); | |
c99eb1c7 | 986 | goto out; |
6f6c7006 | 987 | } |
f24e9980 | 988 | |
6f6c7006 | 989 | dout("map_request osd %p is osd%d\n", req->r_osd, o); |
f24e9980 SW |
990 | req->r_osd->o_osd = o; |
991 | req->r_osd->o_con.peer_name.num = cpu_to_le64(o); | |
992 | __insert_osd(osdc, req->r_osd); | |
993 | ||
994 | ceph_con_open(&req->r_osd->o_con, &osdc->osdmap->osd_addr[o]); | |
995 | } | |
996 | ||
f5a2041b YS |
997 | if (req->r_osd) { |
998 | __remove_osd_from_lru(req->r_osd); | |
f24e9980 | 999 | list_add(&req->r_osd_item, &req->r_osd->o_requests); |
6f6c7006 SW |
1000 | list_move(&req->r_req_lru_item, &osdc->req_unsent); |
1001 | } else { | |
1002 | list_move(&req->r_req_lru_item, &osdc->req_notarget); | |
f5a2041b | 1003 | } |
d85b7056 | 1004 | err = 1; /* osd or pg changed */ |
f24e9980 SW |
1005 | |
1006 | out: | |
f24e9980 SW |
1007 | return err; |
1008 | } | |
1009 | ||
1010 | /* | |
1011 | * caller should hold map_sem (for read) and request_mutex | |
1012 | */ | |
1013 | static int __send_request(struct ceph_osd_client *osdc, | |
1014 | struct ceph_osd_request *req) | |
1015 | { | |
1016 | struct ceph_osd_request_head *reqhead; | |
f24e9980 SW |
1017 | |
1018 | dout("send_request %p tid %llu to osd%d flags %d\n", | |
1019 | req, req->r_tid, req->r_osd->o_osd, req->r_flags); | |
1020 | ||
1021 | reqhead = req->r_request->front.iov_base; | |
1022 | reqhead->osdmap_epoch = cpu_to_le32(osdc->osdmap->epoch); | |
1023 | reqhead->flags |= cpu_to_le32(req->r_flags); /* e.g., RETRY */ | |
1024 | reqhead->reassert_version = req->r_reassert_version; | |
1025 | ||
3dd72fc0 | 1026 | req->r_stamp = jiffies; |
07a27e22 | 1027 | list_move_tail(&req->r_req_lru_item, &osdc->req_lru); |
f24e9980 SW |
1028 | |
1029 | ceph_msg_get(req->r_request); /* send consumes a ref */ | |
1030 | ceph_con_send(&req->r_osd->o_con, req->r_request); | |
1031 | req->r_sent = req->r_osd->o_incarnation; | |
1032 | return 0; | |
1033 | } | |
1034 | ||
6f6c7006 SW |
1035 | /* |
1036 | * Send any requests in the queue (req_unsent). | |
1037 | */ | |
1038 | static void send_queued(struct ceph_osd_client *osdc) | |
1039 | { | |
1040 | struct ceph_osd_request *req, *tmp; | |
1041 | ||
1042 | dout("send_queued\n"); | |
1043 | mutex_lock(&osdc->request_mutex); | |
1044 | list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item) { | |
1045 | __send_request(osdc, req); | |
1046 | } | |
1047 | mutex_unlock(&osdc->request_mutex); | |
1048 | } | |
1049 | ||
f24e9980 SW |
1050 | /* |
1051 | * Timeout callback, called every N seconds when 1 or more osd | |
1052 | * requests has been active for more than N seconds. When this | |
1053 | * happens, we ping all OSDs with requests who have timed out to | |
1054 | * ensure any communications channel reset is detected. Reset the | |
1055 | * request timeouts another N seconds in the future as we go. | |
1056 | * Reschedule the timeout event another N seconds in future (unless | |
1057 | * there are no open requests). | |
1058 | */ | |
1059 | static void handle_timeout(struct work_struct *work) | |
1060 | { | |
1061 | struct ceph_osd_client *osdc = | |
1062 | container_of(work, struct ceph_osd_client, timeout_work.work); | |
422d2cb8 | 1063 | struct ceph_osd_request *req, *last_req = NULL; |
f24e9980 | 1064 | struct ceph_osd *osd; |
3d14c5d2 | 1065 | unsigned long timeout = osdc->client->options->osd_timeout * HZ; |
422d2cb8 | 1066 | unsigned long keepalive = |
3d14c5d2 | 1067 | osdc->client->options->osd_keepalive_timeout * HZ; |
3dd72fc0 | 1068 | unsigned long last_stamp = 0; |
422d2cb8 | 1069 | struct list_head slow_osds; |
f24e9980 SW |
1070 | dout("timeout\n"); |
1071 | down_read(&osdc->map_sem); | |
1072 | ||
1073 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1074 | ||
1075 | mutex_lock(&osdc->request_mutex); | |
f24e9980 | 1076 | |
422d2cb8 YS |
1077 | /* |
1078 | * reset osds that appear to be _really_ unresponsive. this | |
1079 | * is a failsafe measure.. we really shouldn't be getting to | |
1080 | * this point if the system is working properly. the monitors | |
1081 | * should mark the osd as failed and we should find out about | |
1082 | * it from an updated osd map. | |
1083 | */ | |
f26e681d | 1084 | while (timeout && !list_empty(&osdc->req_lru)) { |
422d2cb8 YS |
1085 | req = list_entry(osdc->req_lru.next, struct ceph_osd_request, |
1086 | r_req_lru_item); | |
1087 | ||
3dd72fc0 | 1088 | if (time_before(jiffies, req->r_stamp + timeout)) |
422d2cb8 YS |
1089 | break; |
1090 | ||
3dd72fc0 | 1091 | BUG_ON(req == last_req && req->r_stamp == last_stamp); |
422d2cb8 | 1092 | last_req = req; |
3dd72fc0 | 1093 | last_stamp = req->r_stamp; |
422d2cb8 YS |
1094 | |
1095 | osd = req->r_osd; | |
1096 | BUG_ON(!osd); | |
1097 | pr_warning(" tid %llu timed out on osd%d, will reset osd\n", | |
1098 | req->r_tid, osd->o_osd); | |
6f6c7006 | 1099 | __kick_osd_requests(osdc, osd); |
422d2cb8 YS |
1100 | } |
1101 | ||
1102 | /* | |
1103 | * ping osds that are a bit slow. this ensures that if there | |
1104 | * is a break in the TCP connection we will notice, and reopen | |
1105 | * a connection with that osd (from the fault callback). | |
1106 | */ | |
1107 | INIT_LIST_HEAD(&slow_osds); | |
1108 | list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) { | |
3dd72fc0 | 1109 | if (time_before(jiffies, req->r_stamp + keepalive)) |
422d2cb8 YS |
1110 | break; |
1111 | ||
1112 | osd = req->r_osd; | |
1113 | BUG_ON(!osd); | |
1114 | dout(" tid %llu is slow, will send keepalive on osd%d\n", | |
f24e9980 | 1115 | req->r_tid, osd->o_osd); |
422d2cb8 YS |
1116 | list_move_tail(&osd->o_keepalive_item, &slow_osds); |
1117 | } | |
1118 | while (!list_empty(&slow_osds)) { | |
1119 | osd = list_entry(slow_osds.next, struct ceph_osd, | |
1120 | o_keepalive_item); | |
1121 | list_del_init(&osd->o_keepalive_item); | |
f24e9980 SW |
1122 | ceph_con_keepalive(&osd->o_con); |
1123 | } | |
1124 | ||
422d2cb8 | 1125 | __schedule_osd_timeout(osdc); |
f24e9980 | 1126 | mutex_unlock(&osdc->request_mutex); |
6f6c7006 | 1127 | send_queued(osdc); |
f24e9980 SW |
1128 | up_read(&osdc->map_sem); |
1129 | } | |
1130 | ||
f5a2041b YS |
1131 | static void handle_osds_timeout(struct work_struct *work) |
1132 | { | |
1133 | struct ceph_osd_client *osdc = | |
1134 | container_of(work, struct ceph_osd_client, | |
1135 | osds_timeout_work.work); | |
1136 | unsigned long delay = | |
3d14c5d2 | 1137 | osdc->client->options->osd_idle_ttl * HZ >> 2; |
f5a2041b YS |
1138 | |
1139 | dout("osds timeout\n"); | |
1140 | down_read(&osdc->map_sem); | |
1141 | remove_old_osds(osdc, 0); | |
1142 | up_read(&osdc->map_sem); | |
1143 | ||
1144 | schedule_delayed_work(&osdc->osds_timeout_work, | |
1145 | round_jiffies_relative(delay)); | |
1146 | } | |
1147 | ||
25845472 SW |
1148 | static void complete_request(struct ceph_osd_request *req) |
1149 | { | |
1150 | if (req->r_safe_callback) | |
1151 | req->r_safe_callback(req, NULL); | |
1152 | complete_all(&req->r_safe_completion); /* fsync waiter */ | |
1153 | } | |
1154 | ||
f24e9980 SW |
1155 | /* |
1156 | * handle osd op reply. either call the callback if it is specified, | |
1157 | * or do the completion to wake up the waiting thread. | |
1158 | */ | |
350b1c32 SW |
1159 | static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg, |
1160 | struct ceph_connection *con) | |
f24e9980 SW |
1161 | { |
1162 | struct ceph_osd_reply_head *rhead = msg->front.iov_base; | |
1163 | struct ceph_osd_request *req; | |
1164 | u64 tid; | |
1165 | int numops, object_len, flags; | |
0ceed5db | 1166 | s32 result; |
f24e9980 | 1167 | |
6df058c0 | 1168 | tid = le64_to_cpu(msg->hdr.tid); |
f24e9980 SW |
1169 | if (msg->front.iov_len < sizeof(*rhead)) |
1170 | goto bad; | |
f24e9980 SW |
1171 | numops = le32_to_cpu(rhead->num_ops); |
1172 | object_len = le32_to_cpu(rhead->object_len); | |
0ceed5db | 1173 | result = le32_to_cpu(rhead->result); |
f24e9980 SW |
1174 | if (msg->front.iov_len != sizeof(*rhead) + object_len + |
1175 | numops * sizeof(struct ceph_osd_op)) | |
1176 | goto bad; | |
0ceed5db | 1177 | dout("handle_reply %p tid %llu result %d\n", msg, tid, (int)result); |
f24e9980 SW |
1178 | /* lookup */ |
1179 | mutex_lock(&osdc->request_mutex); | |
1180 | req = __lookup_request(osdc, tid); | |
1181 | if (req == NULL) { | |
1182 | dout("handle_reply tid %llu dne\n", tid); | |
1183 | mutex_unlock(&osdc->request_mutex); | |
1184 | return; | |
1185 | } | |
1186 | ceph_osdc_get_request(req); | |
1187 | flags = le32_to_cpu(rhead->flags); | |
1188 | ||
350b1c32 | 1189 | /* |
0d59ab81 | 1190 | * if this connection filled our message, drop our reference now, to |
350b1c32 SW |
1191 | * avoid a (safe but slower) revoke later. |
1192 | */ | |
0d59ab81 | 1193 | if (req->r_con_filling_msg == con && req->r_reply == msg) { |
c16e7869 | 1194 | dout(" dropping con_filling_msg ref %p\n", con); |
0d59ab81 | 1195 | req->r_con_filling_msg = NULL; |
350b1c32 SW |
1196 | ceph_con_put(con); |
1197 | } | |
1198 | ||
f24e9980 SW |
1199 | if (!req->r_got_reply) { |
1200 | unsigned bytes; | |
1201 | ||
1202 | req->r_result = le32_to_cpu(rhead->result); | |
1203 | bytes = le32_to_cpu(msg->hdr.data_len); | |
1204 | dout("handle_reply result %d bytes %d\n", req->r_result, | |
1205 | bytes); | |
1206 | if (req->r_result == 0) | |
1207 | req->r_result = bytes; | |
1208 | ||
1209 | /* in case this is a write and we need to replay, */ | |
1210 | req->r_reassert_version = rhead->reassert_version; | |
1211 | ||
1212 | req->r_got_reply = 1; | |
1213 | } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) { | |
1214 | dout("handle_reply tid %llu dup ack\n", tid); | |
34b43a56 | 1215 | mutex_unlock(&osdc->request_mutex); |
f24e9980 SW |
1216 | goto done; |
1217 | } | |
1218 | ||
1219 | dout("handle_reply tid %llu flags %d\n", tid, flags); | |
1220 | ||
a40c4f10 YS |
1221 | if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK)) |
1222 | __register_linger_request(osdc, req); | |
1223 | ||
f24e9980 | 1224 | /* either this is a read, or we got the safe response */ |
0ceed5db SW |
1225 | if (result < 0 || |
1226 | (flags & CEPH_OSD_FLAG_ONDISK) || | |
f24e9980 SW |
1227 | ((flags & CEPH_OSD_FLAG_WRITE) == 0)) |
1228 | __unregister_request(osdc, req); | |
1229 | ||
1230 | mutex_unlock(&osdc->request_mutex); | |
1231 | ||
1232 | if (req->r_callback) | |
1233 | req->r_callback(req, msg); | |
1234 | else | |
03066f23 | 1235 | complete_all(&req->r_completion); |
f24e9980 | 1236 | |
25845472 SW |
1237 | if (flags & CEPH_OSD_FLAG_ONDISK) |
1238 | complete_request(req); | |
f24e9980 SW |
1239 | |
1240 | done: | |
a40c4f10 | 1241 | dout("req=%p req->r_linger=%d\n", req, req->r_linger); |
f24e9980 SW |
1242 | ceph_osdc_put_request(req); |
1243 | return; | |
1244 | ||
1245 | bad: | |
1246 | pr_err("corrupt osd_op_reply got %d %d expected %d\n", | |
1247 | (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len), | |
1248 | (int)sizeof(*rhead)); | |
9ec7cab1 | 1249 | ceph_msg_dump(msg); |
f24e9980 SW |
1250 | } |
1251 | ||
6f6c7006 | 1252 | static void reset_changed_osds(struct ceph_osd_client *osdc) |
f24e9980 | 1253 | { |
f24e9980 | 1254 | struct rb_node *p, *n; |
f24e9980 | 1255 | |
6f6c7006 SW |
1256 | for (p = rb_first(&osdc->osds); p; p = n) { |
1257 | struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node); | |
f24e9980 | 1258 | |
6f6c7006 SW |
1259 | n = rb_next(p); |
1260 | if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || | |
1261 | memcmp(&osd->o_con.peer_addr, | |
1262 | ceph_osd_addr(osdc->osdmap, | |
1263 | osd->o_osd), | |
1264 | sizeof(struct ceph_entity_addr)) != 0) | |
1265 | __reset_osd(osdc, osd); | |
f24e9980 | 1266 | } |
422d2cb8 YS |
1267 | } |
1268 | ||
1269 | /* | |
6f6c7006 SW |
1270 | * Requeue requests whose mapping to an OSD has changed. If requests map to |
1271 | * no osd, request a new map. | |
422d2cb8 YS |
1272 | * |
1273 | * Caller should hold map_sem for read and request_mutex. | |
1274 | */ | |
6f6c7006 | 1275 | static void kick_requests(struct ceph_osd_client *osdc) |
422d2cb8 | 1276 | { |
a40c4f10 | 1277 | struct ceph_osd_request *req, *nreq; |
6f6c7006 SW |
1278 | struct rb_node *p; |
1279 | int needmap = 0; | |
1280 | int err; | |
422d2cb8 | 1281 | |
6f6c7006 | 1282 | dout("kick_requests\n"); |
422d2cb8 | 1283 | mutex_lock(&osdc->request_mutex); |
6f6c7006 SW |
1284 | for (p = rb_first(&osdc->requests); p; p = rb_next(p)) { |
1285 | req = rb_entry(p, struct ceph_osd_request, r_node); | |
1286 | err = __map_request(osdc, req); | |
1287 | if (err < 0) | |
1288 | continue; /* error */ | |
1289 | if (req->r_osd == NULL) { | |
1290 | dout("%p tid %llu maps to no osd\n", req, req->r_tid); | |
1291 | needmap++; /* request a newer map */ | |
1292 | } else if (err > 0) { | |
1293 | dout("%p tid %llu requeued on osd%d\n", req, req->r_tid, | |
1294 | req->r_osd ? req->r_osd->o_osd : -1); | |
a40c4f10 YS |
1295 | if (!req->r_linger) |
1296 | req->r_flags |= CEPH_OSD_FLAG_RETRY; | |
1297 | } | |
1298 | } | |
1299 | ||
1300 | list_for_each_entry_safe(req, nreq, &osdc->req_linger, | |
1301 | r_linger_item) { | |
1302 | dout("linger req=%p req->r_osd=%p\n", req, req->r_osd); | |
1303 | ||
1304 | err = __map_request(osdc, req); | |
1305 | if (err == 0) | |
1306 | continue; /* no change and no osd was specified */ | |
1307 | if (err < 0) | |
1308 | continue; /* hrm! */ | |
1309 | if (req->r_osd == NULL) { | |
1310 | dout("tid %llu maps to no valid osd\n", req->r_tid); | |
1311 | needmap++; /* request a newer map */ | |
1312 | continue; | |
6f6c7006 | 1313 | } |
a40c4f10 YS |
1314 | |
1315 | dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid, | |
1316 | req->r_osd ? req->r_osd->o_osd : -1); | |
1317 | __unregister_linger_request(osdc, req); | |
1318 | __register_request(osdc, req); | |
6f6c7006 | 1319 | } |
f24e9980 SW |
1320 | mutex_unlock(&osdc->request_mutex); |
1321 | ||
1322 | if (needmap) { | |
1323 | dout("%d requests for down osds, need new map\n", needmap); | |
1324 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1325 | } | |
422d2cb8 | 1326 | } |
6f6c7006 SW |
1327 | |
1328 | ||
f24e9980 SW |
1329 | /* |
1330 | * Process updated osd map. | |
1331 | * | |
1332 | * The message contains any number of incremental and full maps, normally | |
1333 | * indicating some sort of topology change in the cluster. Kick requests | |
1334 | * off to different OSDs as needed. | |
1335 | */ | |
1336 | void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) | |
1337 | { | |
1338 | void *p, *end, *next; | |
1339 | u32 nr_maps, maplen; | |
1340 | u32 epoch; | |
1341 | struct ceph_osdmap *newmap = NULL, *oldmap; | |
1342 | int err; | |
1343 | struct ceph_fsid fsid; | |
1344 | ||
1345 | dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0); | |
1346 | p = msg->front.iov_base; | |
1347 | end = p + msg->front.iov_len; | |
1348 | ||
1349 | /* verify fsid */ | |
1350 | ceph_decode_need(&p, end, sizeof(fsid), bad); | |
1351 | ceph_decode_copy(&p, &fsid, sizeof(fsid)); | |
0743304d SW |
1352 | if (ceph_check_fsid(osdc->client, &fsid) < 0) |
1353 | return; | |
f24e9980 SW |
1354 | |
1355 | down_write(&osdc->map_sem); | |
1356 | ||
1357 | /* incremental maps */ | |
1358 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
1359 | dout(" %d inc maps\n", nr_maps); | |
1360 | while (nr_maps > 0) { | |
1361 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
1362 | epoch = ceph_decode_32(&p); |
1363 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
1364 | ceph_decode_need(&p, end, maplen, bad); |
1365 | next = p + maplen; | |
1366 | if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) { | |
1367 | dout("applying incremental map %u len %d\n", | |
1368 | epoch, maplen); | |
1369 | newmap = osdmap_apply_incremental(&p, next, | |
1370 | osdc->osdmap, | |
1371 | osdc->client->msgr); | |
1372 | if (IS_ERR(newmap)) { | |
1373 | err = PTR_ERR(newmap); | |
1374 | goto bad; | |
1375 | } | |
30dc6381 | 1376 | BUG_ON(!newmap); |
f24e9980 SW |
1377 | if (newmap != osdc->osdmap) { |
1378 | ceph_osdmap_destroy(osdc->osdmap); | |
1379 | osdc->osdmap = newmap; | |
1380 | } | |
6f6c7006 SW |
1381 | kick_requests(osdc); |
1382 | reset_changed_osds(osdc); | |
f24e9980 SW |
1383 | } else { |
1384 | dout("ignoring incremental map %u len %d\n", | |
1385 | epoch, maplen); | |
1386 | } | |
1387 | p = next; | |
1388 | nr_maps--; | |
1389 | } | |
1390 | if (newmap) | |
1391 | goto done; | |
1392 | ||
1393 | /* full maps */ | |
1394 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
1395 | dout(" %d full maps\n", nr_maps); | |
1396 | while (nr_maps) { | |
1397 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
1398 | epoch = ceph_decode_32(&p); |
1399 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
1400 | ceph_decode_need(&p, end, maplen, bad); |
1401 | if (nr_maps > 1) { | |
1402 | dout("skipping non-latest full map %u len %d\n", | |
1403 | epoch, maplen); | |
1404 | } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) { | |
1405 | dout("skipping full map %u len %d, " | |
1406 | "older than our %u\n", epoch, maplen, | |
1407 | osdc->osdmap->epoch); | |
1408 | } else { | |
1409 | dout("taking full map %u len %d\n", epoch, maplen); | |
1410 | newmap = osdmap_decode(&p, p+maplen); | |
1411 | if (IS_ERR(newmap)) { | |
1412 | err = PTR_ERR(newmap); | |
1413 | goto bad; | |
1414 | } | |
30dc6381 | 1415 | BUG_ON(!newmap); |
f24e9980 SW |
1416 | oldmap = osdc->osdmap; |
1417 | osdc->osdmap = newmap; | |
1418 | if (oldmap) | |
1419 | ceph_osdmap_destroy(oldmap); | |
6f6c7006 | 1420 | kick_requests(osdc); |
f24e9980 SW |
1421 | } |
1422 | p += maplen; | |
1423 | nr_maps--; | |
1424 | } | |
1425 | ||
1426 | done: | |
1427 | downgrade_write(&osdc->map_sem); | |
1428 | ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch); | |
cd634fb6 SW |
1429 | |
1430 | /* | |
1431 | * subscribe to subsequent osdmap updates if full to ensure | |
1432 | * we find out when we are no longer full and stop returning | |
1433 | * ENOSPC. | |
1434 | */ | |
1435 | if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL)) | |
1436 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1437 | ||
6f6c7006 | 1438 | send_queued(osdc); |
f24e9980 | 1439 | up_read(&osdc->map_sem); |
03066f23 | 1440 | wake_up_all(&osdc->client->auth_wq); |
f24e9980 SW |
1441 | return; |
1442 | ||
1443 | bad: | |
1444 | pr_err("osdc handle_map corrupt msg\n"); | |
9ec7cab1 | 1445 | ceph_msg_dump(msg); |
f24e9980 SW |
1446 | up_write(&osdc->map_sem); |
1447 | return; | |
1448 | } | |
1449 | ||
a40c4f10 YS |
1450 | /* |
1451 | * watch/notify callback event infrastructure | |
1452 | * | |
1453 | * These callbacks are used both for watch and notify operations. | |
1454 | */ | |
1455 | static void __release_event(struct kref *kref) | |
1456 | { | |
1457 | struct ceph_osd_event *event = | |
1458 | container_of(kref, struct ceph_osd_event, kref); | |
1459 | ||
1460 | dout("__release_event %p\n", event); | |
1461 | kfree(event); | |
1462 | } | |
1463 | ||
1464 | static void get_event(struct ceph_osd_event *event) | |
1465 | { | |
1466 | kref_get(&event->kref); | |
1467 | } | |
1468 | ||
1469 | void ceph_osdc_put_event(struct ceph_osd_event *event) | |
1470 | { | |
1471 | kref_put(&event->kref, __release_event); | |
1472 | } | |
1473 | EXPORT_SYMBOL(ceph_osdc_put_event); | |
1474 | ||
1475 | static void __insert_event(struct ceph_osd_client *osdc, | |
1476 | struct ceph_osd_event *new) | |
1477 | { | |
1478 | struct rb_node **p = &osdc->event_tree.rb_node; | |
1479 | struct rb_node *parent = NULL; | |
1480 | struct ceph_osd_event *event = NULL; | |
1481 | ||
1482 | while (*p) { | |
1483 | parent = *p; | |
1484 | event = rb_entry(parent, struct ceph_osd_event, node); | |
1485 | if (new->cookie < event->cookie) | |
1486 | p = &(*p)->rb_left; | |
1487 | else if (new->cookie > event->cookie) | |
1488 | p = &(*p)->rb_right; | |
1489 | else | |
1490 | BUG(); | |
1491 | } | |
1492 | ||
1493 | rb_link_node(&new->node, parent, p); | |
1494 | rb_insert_color(&new->node, &osdc->event_tree); | |
1495 | } | |
1496 | ||
1497 | static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc, | |
1498 | u64 cookie) | |
1499 | { | |
1500 | struct rb_node **p = &osdc->event_tree.rb_node; | |
1501 | struct rb_node *parent = NULL; | |
1502 | struct ceph_osd_event *event = NULL; | |
1503 | ||
1504 | while (*p) { | |
1505 | parent = *p; | |
1506 | event = rb_entry(parent, struct ceph_osd_event, node); | |
1507 | if (cookie < event->cookie) | |
1508 | p = &(*p)->rb_left; | |
1509 | else if (cookie > event->cookie) | |
1510 | p = &(*p)->rb_right; | |
1511 | else | |
1512 | return event; | |
1513 | } | |
1514 | return NULL; | |
1515 | } | |
1516 | ||
1517 | static void __remove_event(struct ceph_osd_event *event) | |
1518 | { | |
1519 | struct ceph_osd_client *osdc = event->osdc; | |
1520 | ||
1521 | if (!RB_EMPTY_NODE(&event->node)) { | |
1522 | dout("__remove_event removed %p\n", event); | |
1523 | rb_erase(&event->node, &osdc->event_tree); | |
1524 | ceph_osdc_put_event(event); | |
1525 | } else { | |
1526 | dout("__remove_event didn't remove %p\n", event); | |
1527 | } | |
1528 | } | |
1529 | ||
1530 | int ceph_osdc_create_event(struct ceph_osd_client *osdc, | |
1531 | void (*event_cb)(u64, u64, u8, void *), | |
1532 | int one_shot, void *data, | |
1533 | struct ceph_osd_event **pevent) | |
1534 | { | |
1535 | struct ceph_osd_event *event; | |
1536 | ||
1537 | event = kmalloc(sizeof(*event), GFP_NOIO); | |
1538 | if (!event) | |
1539 | return -ENOMEM; | |
1540 | ||
1541 | dout("create_event %p\n", event); | |
1542 | event->cb = event_cb; | |
1543 | event->one_shot = one_shot; | |
1544 | event->data = data; | |
1545 | event->osdc = osdc; | |
1546 | INIT_LIST_HEAD(&event->osd_node); | |
1547 | kref_init(&event->kref); /* one ref for us */ | |
1548 | kref_get(&event->kref); /* one ref for the caller */ | |
1549 | init_completion(&event->completion); | |
1550 | ||
1551 | spin_lock(&osdc->event_lock); | |
1552 | event->cookie = ++osdc->event_count; | |
1553 | __insert_event(osdc, event); | |
1554 | spin_unlock(&osdc->event_lock); | |
1555 | ||
1556 | *pevent = event; | |
1557 | return 0; | |
1558 | } | |
1559 | EXPORT_SYMBOL(ceph_osdc_create_event); | |
1560 | ||
1561 | void ceph_osdc_cancel_event(struct ceph_osd_event *event) | |
1562 | { | |
1563 | struct ceph_osd_client *osdc = event->osdc; | |
1564 | ||
1565 | dout("cancel_event %p\n", event); | |
1566 | spin_lock(&osdc->event_lock); | |
1567 | __remove_event(event); | |
1568 | spin_unlock(&osdc->event_lock); | |
1569 | ceph_osdc_put_event(event); /* caller's */ | |
1570 | } | |
1571 | EXPORT_SYMBOL(ceph_osdc_cancel_event); | |
1572 | ||
1573 | ||
1574 | static void do_event_work(struct work_struct *work) | |
1575 | { | |
1576 | struct ceph_osd_event_work *event_work = | |
1577 | container_of(work, struct ceph_osd_event_work, work); | |
1578 | struct ceph_osd_event *event = event_work->event; | |
1579 | u64 ver = event_work->ver; | |
1580 | u64 notify_id = event_work->notify_id; | |
1581 | u8 opcode = event_work->opcode; | |
1582 | ||
1583 | dout("do_event_work completing %p\n", event); | |
1584 | event->cb(ver, notify_id, opcode, event->data); | |
1585 | complete(&event->completion); | |
1586 | dout("do_event_work completed %p\n", event); | |
1587 | ceph_osdc_put_event(event); | |
1588 | kfree(event_work); | |
1589 | } | |
1590 | ||
1591 | ||
1592 | /* | |
1593 | * Process osd watch notifications | |
1594 | */ | |
1595 | void handle_watch_notify(struct ceph_osd_client *osdc, struct ceph_msg *msg) | |
1596 | { | |
1597 | void *p, *end; | |
1598 | u8 proto_ver; | |
1599 | u64 cookie, ver, notify_id; | |
1600 | u8 opcode; | |
1601 | struct ceph_osd_event *event; | |
1602 | struct ceph_osd_event_work *event_work; | |
1603 | ||
1604 | p = msg->front.iov_base; | |
1605 | end = p + msg->front.iov_len; | |
1606 | ||
1607 | ceph_decode_8_safe(&p, end, proto_ver, bad); | |
1608 | ceph_decode_8_safe(&p, end, opcode, bad); | |
1609 | ceph_decode_64_safe(&p, end, cookie, bad); | |
1610 | ceph_decode_64_safe(&p, end, ver, bad); | |
1611 | ceph_decode_64_safe(&p, end, notify_id, bad); | |
1612 | ||
1613 | spin_lock(&osdc->event_lock); | |
1614 | event = __find_event(osdc, cookie); | |
1615 | if (event) { | |
1616 | get_event(event); | |
1617 | if (event->one_shot) | |
1618 | __remove_event(event); | |
1619 | } | |
1620 | spin_unlock(&osdc->event_lock); | |
1621 | dout("handle_watch_notify cookie %lld ver %lld event %p\n", | |
1622 | cookie, ver, event); | |
1623 | if (event) { | |
1624 | event_work = kmalloc(sizeof(*event_work), GFP_NOIO); | |
a40c4f10 YS |
1625 | if (!event_work) { |
1626 | dout("ERROR: could not allocate event_work\n"); | |
1627 | goto done_err; | |
1628 | } | |
6b0ae409 | 1629 | INIT_WORK(&event_work->work, do_event_work); |
a40c4f10 YS |
1630 | event_work->event = event; |
1631 | event_work->ver = ver; | |
1632 | event_work->notify_id = notify_id; | |
1633 | event_work->opcode = opcode; | |
1634 | if (!queue_work(osdc->notify_wq, &event_work->work)) { | |
1635 | dout("WARNING: failed to queue notify event work\n"); | |
1636 | goto done_err; | |
1637 | } | |
1638 | } | |
1639 | ||
1640 | return; | |
1641 | ||
1642 | done_err: | |
1643 | complete(&event->completion); | |
1644 | ceph_osdc_put_event(event); | |
1645 | return; | |
1646 | ||
1647 | bad: | |
1648 | pr_err("osdc handle_watch_notify corrupt msg\n"); | |
1649 | return; | |
1650 | } | |
1651 | ||
1652 | int ceph_osdc_wait_event(struct ceph_osd_event *event, unsigned long timeout) | |
1653 | { | |
1654 | int err; | |
1655 | ||
1656 | dout("wait_event %p\n", event); | |
1657 | err = wait_for_completion_interruptible_timeout(&event->completion, | |
1658 | timeout * HZ); | |
1659 | ceph_osdc_put_event(event); | |
1660 | if (err > 0) | |
1661 | err = 0; | |
1662 | dout("wait_event %p returns %d\n", event, err); | |
1663 | return err; | |
1664 | } | |
1665 | EXPORT_SYMBOL(ceph_osdc_wait_event); | |
1666 | ||
f24e9980 SW |
1667 | /* |
1668 | * Register request, send initial attempt. | |
1669 | */ | |
1670 | int ceph_osdc_start_request(struct ceph_osd_client *osdc, | |
1671 | struct ceph_osd_request *req, | |
1672 | bool nofail) | |
1673 | { | |
c1ea8823 | 1674 | int rc = 0; |
f24e9980 SW |
1675 | |
1676 | req->r_request->pages = req->r_pages; | |
1677 | req->r_request->nr_pages = req->r_num_pages; | |
68b4476b YS |
1678 | #ifdef CONFIG_BLOCK |
1679 | req->r_request->bio = req->r_bio; | |
1680 | #endif | |
1681 | req->r_request->trail = req->r_trail; | |
f24e9980 SW |
1682 | |
1683 | register_request(osdc, req); | |
1684 | ||
1685 | down_read(&osdc->map_sem); | |
1686 | mutex_lock(&osdc->request_mutex); | |
c1ea8823 SW |
1687 | /* |
1688 | * a racing kick_requests() may have sent the message for us | |
1689 | * while we dropped request_mutex above, so only send now if | |
1690 | * the request still han't been touched yet. | |
1691 | */ | |
1692 | if (req->r_sent == 0) { | |
6f6c7006 | 1693 | rc = __map_request(osdc, req); |
9d6fcb08 SW |
1694 | if (rc < 0) { |
1695 | if (nofail) { | |
1696 | dout("osdc_start_request failed map, " | |
1697 | " will retry %lld\n", req->r_tid); | |
1698 | rc = 0; | |
1699 | } | |
234af26f | 1700 | goto out_unlock; |
9d6fcb08 | 1701 | } |
6f6c7006 SW |
1702 | if (req->r_osd == NULL) { |
1703 | dout("send_request %p no up osds in pg\n", req); | |
1704 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1705 | } else { | |
1706 | rc = __send_request(osdc, req); | |
1707 | if (rc) { | |
1708 | if (nofail) { | |
1709 | dout("osdc_start_request failed send, " | |
1710 | " will retry %lld\n", req->r_tid); | |
1711 | rc = 0; | |
1712 | } else { | |
1713 | __unregister_request(osdc, req); | |
1714 | } | |
c1ea8823 | 1715 | } |
f24e9980 SW |
1716 | } |
1717 | } | |
234af26f DC |
1718 | |
1719 | out_unlock: | |
f24e9980 SW |
1720 | mutex_unlock(&osdc->request_mutex); |
1721 | up_read(&osdc->map_sem); | |
1722 | return rc; | |
1723 | } | |
3d14c5d2 | 1724 | EXPORT_SYMBOL(ceph_osdc_start_request); |
f24e9980 SW |
1725 | |
1726 | /* | |
1727 | * wait for a request to complete | |
1728 | */ | |
1729 | int ceph_osdc_wait_request(struct ceph_osd_client *osdc, | |
1730 | struct ceph_osd_request *req) | |
1731 | { | |
1732 | int rc; | |
1733 | ||
1734 | rc = wait_for_completion_interruptible(&req->r_completion); | |
1735 | if (rc < 0) { | |
1736 | mutex_lock(&osdc->request_mutex); | |
1737 | __cancel_request(req); | |
529cfcc4 | 1738 | __unregister_request(osdc, req); |
f24e9980 | 1739 | mutex_unlock(&osdc->request_mutex); |
25845472 | 1740 | complete_request(req); |
529cfcc4 | 1741 | dout("wait_request tid %llu canceled/timed out\n", req->r_tid); |
f24e9980 SW |
1742 | return rc; |
1743 | } | |
1744 | ||
1745 | dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result); | |
1746 | return req->r_result; | |
1747 | } | |
3d14c5d2 | 1748 | EXPORT_SYMBOL(ceph_osdc_wait_request); |
f24e9980 SW |
1749 | |
1750 | /* | |
1751 | * sync - wait for all in-flight requests to flush. avoid starvation. | |
1752 | */ | |
1753 | void ceph_osdc_sync(struct ceph_osd_client *osdc) | |
1754 | { | |
1755 | struct ceph_osd_request *req; | |
1756 | u64 last_tid, next_tid = 0; | |
1757 | ||
1758 | mutex_lock(&osdc->request_mutex); | |
1759 | last_tid = osdc->last_tid; | |
1760 | while (1) { | |
1761 | req = __lookup_request_ge(osdc, next_tid); | |
1762 | if (!req) | |
1763 | break; | |
1764 | if (req->r_tid > last_tid) | |
1765 | break; | |
1766 | ||
1767 | next_tid = req->r_tid + 1; | |
1768 | if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0) | |
1769 | continue; | |
1770 | ||
1771 | ceph_osdc_get_request(req); | |
1772 | mutex_unlock(&osdc->request_mutex); | |
1773 | dout("sync waiting on tid %llu (last is %llu)\n", | |
1774 | req->r_tid, last_tid); | |
1775 | wait_for_completion(&req->r_safe_completion); | |
1776 | mutex_lock(&osdc->request_mutex); | |
1777 | ceph_osdc_put_request(req); | |
1778 | } | |
1779 | mutex_unlock(&osdc->request_mutex); | |
1780 | dout("sync done (thru tid %llu)\n", last_tid); | |
1781 | } | |
3d14c5d2 | 1782 | EXPORT_SYMBOL(ceph_osdc_sync); |
f24e9980 SW |
1783 | |
1784 | /* | |
1785 | * init, shutdown | |
1786 | */ | |
1787 | int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) | |
1788 | { | |
1789 | int err; | |
1790 | ||
1791 | dout("init\n"); | |
1792 | osdc->client = client; | |
1793 | osdc->osdmap = NULL; | |
1794 | init_rwsem(&osdc->map_sem); | |
1795 | init_completion(&osdc->map_waiters); | |
1796 | osdc->last_requested_map = 0; | |
1797 | mutex_init(&osdc->request_mutex); | |
f24e9980 SW |
1798 | osdc->last_tid = 0; |
1799 | osdc->osds = RB_ROOT; | |
f5a2041b | 1800 | INIT_LIST_HEAD(&osdc->osd_lru); |
f24e9980 | 1801 | osdc->requests = RB_ROOT; |
422d2cb8 | 1802 | INIT_LIST_HEAD(&osdc->req_lru); |
6f6c7006 SW |
1803 | INIT_LIST_HEAD(&osdc->req_unsent); |
1804 | INIT_LIST_HEAD(&osdc->req_notarget); | |
a40c4f10 | 1805 | INIT_LIST_HEAD(&osdc->req_linger); |
f24e9980 SW |
1806 | osdc->num_requests = 0; |
1807 | INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); | |
f5a2041b | 1808 | INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); |
a40c4f10 YS |
1809 | spin_lock_init(&osdc->event_lock); |
1810 | osdc->event_tree = RB_ROOT; | |
1811 | osdc->event_count = 0; | |
f5a2041b YS |
1812 | |
1813 | schedule_delayed_work(&osdc->osds_timeout_work, | |
3d14c5d2 | 1814 | round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ)); |
f24e9980 | 1815 | |
5f44f142 | 1816 | err = -ENOMEM; |
f24e9980 SW |
1817 | osdc->req_mempool = mempool_create_kmalloc_pool(10, |
1818 | sizeof(struct ceph_osd_request)); | |
1819 | if (!osdc->req_mempool) | |
5f44f142 | 1820 | goto out; |
f24e9980 | 1821 | |
4f48280e SW |
1822 | err = ceph_msgpool_init(&osdc->msgpool_op, OSD_OP_FRONT_LEN, 10, true, |
1823 | "osd_op"); | |
f24e9980 | 1824 | if (err < 0) |
5f44f142 | 1825 | goto out_mempool; |
c16e7869 | 1826 | err = ceph_msgpool_init(&osdc->msgpool_op_reply, |
4f48280e SW |
1827 | OSD_OPREPLY_FRONT_LEN, 10, true, |
1828 | "osd_op_reply"); | |
c16e7869 SW |
1829 | if (err < 0) |
1830 | goto out_msgpool; | |
a40c4f10 YS |
1831 | |
1832 | osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); | |
1833 | if (IS_ERR(osdc->notify_wq)) { | |
1834 | err = PTR_ERR(osdc->notify_wq); | |
1835 | osdc->notify_wq = NULL; | |
1836 | goto out_msgpool; | |
1837 | } | |
f24e9980 | 1838 | return 0; |
5f44f142 | 1839 | |
c16e7869 SW |
1840 | out_msgpool: |
1841 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
5f44f142 SW |
1842 | out_mempool: |
1843 | mempool_destroy(osdc->req_mempool); | |
1844 | out: | |
1845 | return err; | |
f24e9980 | 1846 | } |
3d14c5d2 | 1847 | EXPORT_SYMBOL(ceph_osdc_init); |
f24e9980 SW |
1848 | |
1849 | void ceph_osdc_stop(struct ceph_osd_client *osdc) | |
1850 | { | |
a40c4f10 YS |
1851 | flush_workqueue(osdc->notify_wq); |
1852 | destroy_workqueue(osdc->notify_wq); | |
f24e9980 | 1853 | cancel_delayed_work_sync(&osdc->timeout_work); |
f5a2041b | 1854 | cancel_delayed_work_sync(&osdc->osds_timeout_work); |
f24e9980 SW |
1855 | if (osdc->osdmap) { |
1856 | ceph_osdmap_destroy(osdc->osdmap); | |
1857 | osdc->osdmap = NULL; | |
1858 | } | |
f5a2041b | 1859 | remove_old_osds(osdc, 1); |
a40c4f10 | 1860 | WARN_ON(!RB_EMPTY_ROOT(&osdc->osds)); |
f24e9980 SW |
1861 | mempool_destroy(osdc->req_mempool); |
1862 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
c16e7869 | 1863 | ceph_msgpool_destroy(&osdc->msgpool_op_reply); |
f24e9980 | 1864 | } |
3d14c5d2 | 1865 | EXPORT_SYMBOL(ceph_osdc_stop); |
f24e9980 SW |
1866 | |
1867 | /* | |
1868 | * Read some contiguous pages. If we cross a stripe boundary, shorten | |
1869 | * *plen. Return number of bytes read, or error. | |
1870 | */ | |
1871 | int ceph_osdc_readpages(struct ceph_osd_client *osdc, | |
1872 | struct ceph_vino vino, struct ceph_file_layout *layout, | |
1873 | u64 off, u64 *plen, | |
1874 | u32 truncate_seq, u64 truncate_size, | |
b7495fc2 | 1875 | struct page **pages, int num_pages, int page_align) |
f24e9980 SW |
1876 | { |
1877 | struct ceph_osd_request *req; | |
1878 | int rc = 0; | |
1879 | ||
1880 | dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, | |
1881 | vino.snap, off, *plen); | |
1882 | req = ceph_osdc_new_request(osdc, layout, vino, off, plen, | |
1883 | CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, | |
1884 | NULL, 0, truncate_seq, truncate_size, NULL, | |
b7495fc2 | 1885 | false, 1, page_align); |
a79832f2 SW |
1886 | if (!req) |
1887 | return -ENOMEM; | |
f24e9980 SW |
1888 | |
1889 | /* it may be a short read due to an object boundary */ | |
1890 | req->r_pages = pages; | |
f24e9980 | 1891 | |
b7495fc2 SW |
1892 | dout("readpages final extent is %llu~%llu (%d pages align %d)\n", |
1893 | off, *plen, req->r_num_pages, page_align); | |
f24e9980 SW |
1894 | |
1895 | rc = ceph_osdc_start_request(osdc, req, false); | |
1896 | if (!rc) | |
1897 | rc = ceph_osdc_wait_request(osdc, req); | |
1898 | ||
1899 | ceph_osdc_put_request(req); | |
1900 | dout("readpages result %d\n", rc); | |
1901 | return rc; | |
1902 | } | |
3d14c5d2 | 1903 | EXPORT_SYMBOL(ceph_osdc_readpages); |
f24e9980 SW |
1904 | |
1905 | /* | |
1906 | * do a synchronous write on N pages | |
1907 | */ | |
1908 | int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, | |
1909 | struct ceph_file_layout *layout, | |
1910 | struct ceph_snap_context *snapc, | |
1911 | u64 off, u64 len, | |
1912 | u32 truncate_seq, u64 truncate_size, | |
1913 | struct timespec *mtime, | |
1914 | struct page **pages, int num_pages, | |
1915 | int flags, int do_sync, bool nofail) | |
1916 | { | |
1917 | struct ceph_osd_request *req; | |
1918 | int rc = 0; | |
b7495fc2 | 1919 | int page_align = off & ~PAGE_MASK; |
f24e9980 SW |
1920 | |
1921 | BUG_ON(vino.snap != CEPH_NOSNAP); | |
1922 | req = ceph_osdc_new_request(osdc, layout, vino, off, &len, | |
1923 | CEPH_OSD_OP_WRITE, | |
1924 | flags | CEPH_OSD_FLAG_ONDISK | | |
1925 | CEPH_OSD_FLAG_WRITE, | |
1926 | snapc, do_sync, | |
1927 | truncate_seq, truncate_size, mtime, | |
b7495fc2 | 1928 | nofail, 1, page_align); |
a79832f2 SW |
1929 | if (!req) |
1930 | return -ENOMEM; | |
f24e9980 SW |
1931 | |
1932 | /* it may be a short write due to an object boundary */ | |
1933 | req->r_pages = pages; | |
f24e9980 SW |
1934 | dout("writepages %llu~%llu (%d pages)\n", off, len, |
1935 | req->r_num_pages); | |
1936 | ||
1937 | rc = ceph_osdc_start_request(osdc, req, nofail); | |
1938 | if (!rc) | |
1939 | rc = ceph_osdc_wait_request(osdc, req); | |
1940 | ||
1941 | ceph_osdc_put_request(req); | |
1942 | if (rc == 0) | |
1943 | rc = len; | |
1944 | dout("writepages result %d\n", rc); | |
1945 | return rc; | |
1946 | } | |
3d14c5d2 | 1947 | EXPORT_SYMBOL(ceph_osdc_writepages); |
f24e9980 SW |
1948 | |
1949 | /* | |
1950 | * handle incoming message | |
1951 | */ | |
1952 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
1953 | { | |
1954 | struct ceph_osd *osd = con->private; | |
32c895e7 | 1955 | struct ceph_osd_client *osdc; |
f24e9980 SW |
1956 | int type = le16_to_cpu(msg->hdr.type); |
1957 | ||
1958 | if (!osd) | |
4a32f93d | 1959 | goto out; |
32c895e7 | 1960 | osdc = osd->o_osdc; |
f24e9980 SW |
1961 | |
1962 | switch (type) { | |
1963 | case CEPH_MSG_OSD_MAP: | |
1964 | ceph_osdc_handle_map(osdc, msg); | |
1965 | break; | |
1966 | case CEPH_MSG_OSD_OPREPLY: | |
350b1c32 | 1967 | handle_reply(osdc, msg, con); |
f24e9980 | 1968 | break; |
a40c4f10 YS |
1969 | case CEPH_MSG_WATCH_NOTIFY: |
1970 | handle_watch_notify(osdc, msg); | |
1971 | break; | |
f24e9980 SW |
1972 | |
1973 | default: | |
1974 | pr_err("received unknown message type %d %s\n", type, | |
1975 | ceph_msg_type_name(type)); | |
1976 | } | |
4a32f93d | 1977 | out: |
f24e9980 SW |
1978 | ceph_msg_put(msg); |
1979 | } | |
1980 | ||
5b3a4db3 | 1981 | /* |
21b667f6 SW |
1982 | * lookup and return message for incoming reply. set up reply message |
1983 | * pages. | |
5b3a4db3 SW |
1984 | */ |
1985 | static struct ceph_msg *get_reply(struct ceph_connection *con, | |
2450418c YS |
1986 | struct ceph_msg_header *hdr, |
1987 | int *skip) | |
f24e9980 SW |
1988 | { |
1989 | struct ceph_osd *osd = con->private; | |
1990 | struct ceph_osd_client *osdc = osd->o_osdc; | |
2450418c | 1991 | struct ceph_msg *m; |
0547a9b3 | 1992 | struct ceph_osd_request *req; |
5b3a4db3 SW |
1993 | int front = le32_to_cpu(hdr->front_len); |
1994 | int data_len = le32_to_cpu(hdr->data_len); | |
0547a9b3 | 1995 | u64 tid; |
f24e9980 | 1996 | |
0547a9b3 YS |
1997 | tid = le64_to_cpu(hdr->tid); |
1998 | mutex_lock(&osdc->request_mutex); | |
1999 | req = __lookup_request(osdc, tid); | |
2000 | if (!req) { | |
2001 | *skip = 1; | |
2002 | m = NULL; | |
c16e7869 | 2003 | pr_info("get_reply unknown tid %llu from osd%d\n", tid, |
5b3a4db3 | 2004 | osd->o_osd); |
0547a9b3 YS |
2005 | goto out; |
2006 | } | |
c16e7869 SW |
2007 | |
2008 | if (req->r_con_filling_msg) { | |
2009 | dout("get_reply revoking msg %p from old con %p\n", | |
2010 | req->r_reply, req->r_con_filling_msg); | |
2011 | ceph_con_revoke_message(req->r_con_filling_msg, req->r_reply); | |
2012 | ceph_con_put(req->r_con_filling_msg); | |
6f46cb29 | 2013 | req->r_con_filling_msg = NULL; |
0547a9b3 YS |
2014 | } |
2015 | ||
c16e7869 SW |
2016 | if (front > req->r_reply->front.iov_len) { |
2017 | pr_warning("get_reply front %d > preallocated %d\n", | |
2018 | front, (int)req->r_reply->front.iov_len); | |
34d23762 | 2019 | m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS); |
a79832f2 | 2020 | if (!m) |
c16e7869 SW |
2021 | goto out; |
2022 | ceph_msg_put(req->r_reply); | |
2023 | req->r_reply = m; | |
2024 | } | |
2025 | m = ceph_msg_get(req->r_reply); | |
2026 | ||
0547a9b3 | 2027 | if (data_len > 0) { |
b7495fc2 | 2028 | int want = calc_pages_for(req->r_page_alignment, data_len); |
21b667f6 SW |
2029 | |
2030 | if (unlikely(req->r_num_pages < want)) { | |
9bb0ce2b SW |
2031 | pr_warning("tid %lld reply has %d bytes %d pages, we" |
2032 | " had only %d pages ready\n", tid, data_len, | |
2033 | want, req->r_num_pages); | |
0547a9b3 YS |
2034 | *skip = 1; |
2035 | ceph_msg_put(m); | |
a79832f2 | 2036 | m = NULL; |
21b667f6 | 2037 | goto out; |
0547a9b3 | 2038 | } |
21b667f6 SW |
2039 | m->pages = req->r_pages; |
2040 | m->nr_pages = req->r_num_pages; | |
c5c6b19d | 2041 | m->page_alignment = req->r_page_alignment; |
68b4476b YS |
2042 | #ifdef CONFIG_BLOCK |
2043 | m->bio = req->r_bio; | |
2044 | #endif | |
0547a9b3 | 2045 | } |
5b3a4db3 | 2046 | *skip = 0; |
c16e7869 SW |
2047 | req->r_con_filling_msg = ceph_con_get(con); |
2048 | dout("get_reply tid %lld %p\n", tid, m); | |
0547a9b3 YS |
2049 | |
2050 | out: | |
2051 | mutex_unlock(&osdc->request_mutex); | |
2450418c | 2052 | return m; |
5b3a4db3 SW |
2053 | |
2054 | } | |
2055 | ||
2056 | static struct ceph_msg *alloc_msg(struct ceph_connection *con, | |
2057 | struct ceph_msg_header *hdr, | |
2058 | int *skip) | |
2059 | { | |
2060 | struct ceph_osd *osd = con->private; | |
2061 | int type = le16_to_cpu(hdr->type); | |
2062 | int front = le32_to_cpu(hdr->front_len); | |
2063 | ||
2064 | switch (type) { | |
2065 | case CEPH_MSG_OSD_MAP: | |
a40c4f10 | 2066 | case CEPH_MSG_WATCH_NOTIFY: |
34d23762 | 2067 | return ceph_msg_new(type, front, GFP_NOFS); |
5b3a4db3 SW |
2068 | case CEPH_MSG_OSD_OPREPLY: |
2069 | return get_reply(con, hdr, skip); | |
2070 | default: | |
2071 | pr_info("alloc_msg unexpected msg type %d from osd%d\n", type, | |
2072 | osd->o_osd); | |
2073 | *skip = 1; | |
2074 | return NULL; | |
2075 | } | |
f24e9980 SW |
2076 | } |
2077 | ||
2078 | /* | |
2079 | * Wrappers to refcount containing ceph_osd struct | |
2080 | */ | |
2081 | static struct ceph_connection *get_osd_con(struct ceph_connection *con) | |
2082 | { | |
2083 | struct ceph_osd *osd = con->private; | |
2084 | if (get_osd(osd)) | |
2085 | return con; | |
2086 | return NULL; | |
2087 | } | |
2088 | ||
2089 | static void put_osd_con(struct ceph_connection *con) | |
2090 | { | |
2091 | struct ceph_osd *osd = con->private; | |
2092 | put_osd(osd); | |
2093 | } | |
2094 | ||
4e7a5dcd SW |
2095 | /* |
2096 | * authentication | |
2097 | */ | |
2098 | static int get_authorizer(struct ceph_connection *con, | |
213c99ee SW |
2099 | void **buf, int *len, int *proto, |
2100 | void **reply_buf, int *reply_len, int force_new) | |
4e7a5dcd SW |
2101 | { |
2102 | struct ceph_osd *o = con->private; | |
2103 | struct ceph_osd_client *osdc = o->o_osdc; | |
2104 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
2105 | int ret = 0; | |
2106 | ||
2107 | if (force_new && o->o_authorizer) { | |
2108 | ac->ops->destroy_authorizer(ac, o->o_authorizer); | |
2109 | o->o_authorizer = NULL; | |
2110 | } | |
2111 | if (o->o_authorizer == NULL) { | |
2112 | ret = ac->ops->create_authorizer( | |
2113 | ac, CEPH_ENTITY_TYPE_OSD, | |
2114 | &o->o_authorizer, | |
2115 | &o->o_authorizer_buf, | |
2116 | &o->o_authorizer_buf_len, | |
2117 | &o->o_authorizer_reply_buf, | |
2118 | &o->o_authorizer_reply_buf_len); | |
2119 | if (ret) | |
213c99ee | 2120 | return ret; |
4e7a5dcd SW |
2121 | } |
2122 | ||
2123 | *proto = ac->protocol; | |
2124 | *buf = o->o_authorizer_buf; | |
2125 | *len = o->o_authorizer_buf_len; | |
2126 | *reply_buf = o->o_authorizer_reply_buf; | |
2127 | *reply_len = o->o_authorizer_reply_buf_len; | |
2128 | return 0; | |
2129 | } | |
2130 | ||
2131 | ||
2132 | static int verify_authorizer_reply(struct ceph_connection *con, int len) | |
2133 | { | |
2134 | struct ceph_osd *o = con->private; | |
2135 | struct ceph_osd_client *osdc = o->o_osdc; | |
2136 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
2137 | ||
2138 | return ac->ops->verify_authorizer_reply(ac, o->o_authorizer, len); | |
2139 | } | |
2140 | ||
9bd2e6f8 SW |
2141 | static int invalidate_authorizer(struct ceph_connection *con) |
2142 | { | |
2143 | struct ceph_osd *o = con->private; | |
2144 | struct ceph_osd_client *osdc = o->o_osdc; | |
2145 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
2146 | ||
2147 | if (ac->ops->invalidate_authorizer) | |
2148 | ac->ops->invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); | |
2149 | ||
2150 | return ceph_monc_validate_auth(&osdc->client->monc); | |
2151 | } | |
4e7a5dcd | 2152 | |
9e32789f | 2153 | static const struct ceph_connection_operations osd_con_ops = { |
f24e9980 SW |
2154 | .get = get_osd_con, |
2155 | .put = put_osd_con, | |
2156 | .dispatch = dispatch, | |
4e7a5dcd SW |
2157 | .get_authorizer = get_authorizer, |
2158 | .verify_authorizer_reply = verify_authorizer_reply, | |
9bd2e6f8 | 2159 | .invalidate_authorizer = invalidate_authorizer, |
f24e9980 | 2160 | .alloc_msg = alloc_msg, |
81b024e7 | 2161 | .fault = osd_reset, |
f24e9980 | 2162 | }; |