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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 | |
f9d25199 | 26 | static void __send_queued(struct ceph_osd_client *osdc); |
6f6c7006 | 27 | static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd); |
a40c4f10 YS |
28 | static void __register_request(struct ceph_osd_client *osdc, |
29 | struct ceph_osd_request *req); | |
30 | static void __unregister_linger_request(struct ceph_osd_client *osdc, | |
31 | struct ceph_osd_request *req); | |
56e925b6 SW |
32 | static void __send_request(struct ceph_osd_client *osdc, |
33 | struct ceph_osd_request *req); | |
f24e9980 | 34 | |
68b4476b YS |
35 | static int op_has_extent(int op) |
36 | { | |
37 | return (op == CEPH_OSD_OP_READ || | |
38 | op == CEPH_OSD_OP_WRITE); | |
39 | } | |
40 | ||
f24e9980 SW |
41 | /* |
42 | * Implement client access to distributed object storage cluster. | |
43 | * | |
44 | * All data objects are stored within a cluster/cloud of OSDs, or | |
45 | * "object storage devices." (Note that Ceph OSDs have _nothing_ to | |
46 | * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply | |
47 | * remote daemons serving up and coordinating consistent and safe | |
48 | * access to storage. | |
49 | * | |
50 | * Cluster membership and the mapping of data objects onto storage devices | |
51 | * are described by the osd map. | |
52 | * | |
53 | * We keep track of pending OSD requests (read, write), resubmit | |
54 | * requests to different OSDs when the cluster topology/data layout | |
55 | * change, or retry the affected requests when the communications | |
56 | * channel with an OSD is reset. | |
57 | */ | |
58 | ||
59 | /* | |
60 | * calculate the mapping of a file extent onto an object, and fill out the | |
61 | * request accordingly. shorten extent as necessary if it crosses an | |
62 | * object boundary. | |
63 | * | |
64 | * fill osd op in request message. | |
65 | */ | |
e75b45cf | 66 | static int calc_layout(struct ceph_vino vino, |
d63b77f4 SW |
67 | struct ceph_file_layout *layout, |
68 | u64 off, u64 *plen, | |
69 | struct ceph_osd_request *req, | |
70 | struct ceph_osd_req_op *op) | |
f24e9980 | 71 | { |
60e56f13 AE |
72 | u64 orig_len = *plen; |
73 | u64 bno = 0; | |
74 | u64 objoff = 0; | |
75 | u64 objlen = 0; | |
d63b77f4 | 76 | int r; |
f24e9980 | 77 | |
60e56f13 AE |
78 | /* object extent? */ |
79 | r = ceph_calc_file_object_mapping(layout, off, orig_len, &bno, | |
80 | &objoff, &objlen); | |
d63b77f4 SW |
81 | if (r < 0) |
82 | return r; | |
60e56f13 AE |
83 | if (objlen < orig_len) { |
84 | *plen = objlen; | |
85 | dout(" skipping last %llu, final file extent %llu~%llu\n", | |
86 | orig_len - *plen, off, *plen); | |
87 | } | |
88 | ||
89 | if (op_has_extent(op->op)) { | |
90 | u32 osize = le32_to_cpu(layout->fl_object_size); | |
91 | op->extent.offset = objoff; | |
92 | op->extent.length = objlen; | |
93 | if (op->extent.truncate_size <= off - objoff) { | |
94 | op->extent.truncate_size = 0; | |
95 | } else { | |
96 | op->extent.truncate_size -= off - objoff; | |
97 | if (op->extent.truncate_size > osize) | |
98 | op->extent.truncate_size = osize; | |
99 | } | |
100 | } | |
101 | req->r_num_pages = calc_pages_for(off, *plen); | |
102 | req->r_page_alignment = off & ~PAGE_MASK; | |
103 | if (op->op == CEPH_OSD_OP_WRITE) | |
104 | op->payload_len = *plen; | |
105 | ||
106 | dout("calc_layout bno=%llx %llu~%llu (%d pages)\n", | |
107 | bno, objoff, objlen, req->r_num_pages); | |
f24e9980 | 108 | |
2dab036b | 109 | snprintf(req->r_oid, sizeof(req->r_oid), "%llx.%08llx", vino.ino, bno); |
f24e9980 | 110 | req->r_oid_len = strlen(req->r_oid); |
d63b77f4 SW |
111 | |
112 | return r; | |
f24e9980 SW |
113 | } |
114 | ||
f24e9980 SW |
115 | /* |
116 | * requests | |
117 | */ | |
415e49a9 | 118 | void ceph_osdc_release_request(struct kref *kref) |
f24e9980 | 119 | { |
415e49a9 SW |
120 | struct ceph_osd_request *req = container_of(kref, |
121 | struct ceph_osd_request, | |
122 | r_kref); | |
123 | ||
124 | if (req->r_request) | |
125 | ceph_msg_put(req->r_request); | |
0d59ab81 | 126 | if (req->r_con_filling_msg) { |
9cbb1d72 AE |
127 | dout("%s revoking msg %p from con %p\n", __func__, |
128 | req->r_reply, req->r_con_filling_msg); | |
8921d114 | 129 | ceph_msg_revoke_incoming(req->r_reply); |
0d47766f | 130 | req->r_con_filling_msg->ops->put(req->r_con_filling_msg); |
9cbb1d72 | 131 | req->r_con_filling_msg = NULL; |
350b1c32 | 132 | } |
ab8cb34a AE |
133 | if (req->r_reply) |
134 | ceph_msg_put(req->r_reply); | |
415e49a9 SW |
135 | if (req->r_own_pages) |
136 | ceph_release_page_vector(req->r_pages, | |
137 | req->r_num_pages); | |
138 | ceph_put_snap_context(req->r_snapc); | |
c885837f | 139 | ceph_pagelist_release(&req->r_trail); |
415e49a9 SW |
140 | if (req->r_mempool) |
141 | mempool_free(req, req->r_osdc->req_mempool); | |
142 | else | |
143 | kfree(req); | |
f24e9980 | 144 | } |
3d14c5d2 | 145 | EXPORT_SYMBOL(ceph_osdc_release_request); |
68b4476b | 146 | |
3499e8a5 | 147 | struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, |
f24e9980 | 148 | struct ceph_snap_context *snapc, |
ae7ca4a3 | 149 | unsigned int num_op, |
3499e8a5 | 150 | bool use_mempool, |
54a54007 | 151 | gfp_t gfp_flags) |
f24e9980 SW |
152 | { |
153 | struct ceph_osd_request *req; | |
154 | struct ceph_msg *msg; | |
68b4476b | 155 | size_t msg_size = sizeof(struct ceph_osd_request_head); |
3499e8a5 | 156 | |
68b4476b | 157 | msg_size += num_op*sizeof(struct ceph_osd_op); |
f24e9980 SW |
158 | |
159 | if (use_mempool) { | |
3499e8a5 | 160 | req = mempool_alloc(osdc->req_mempool, gfp_flags); |
f24e9980 SW |
161 | memset(req, 0, sizeof(*req)); |
162 | } else { | |
3499e8a5 | 163 | req = kzalloc(sizeof(*req), gfp_flags); |
f24e9980 SW |
164 | } |
165 | if (req == NULL) | |
a79832f2 | 166 | return NULL; |
f24e9980 | 167 | |
f24e9980 SW |
168 | req->r_osdc = osdc; |
169 | req->r_mempool = use_mempool; | |
68b4476b | 170 | |
415e49a9 | 171 | kref_init(&req->r_kref); |
f24e9980 SW |
172 | init_completion(&req->r_completion); |
173 | init_completion(&req->r_safe_completion); | |
a978fa20 | 174 | RB_CLEAR_NODE(&req->r_node); |
f24e9980 | 175 | INIT_LIST_HEAD(&req->r_unsafe_item); |
a40c4f10 YS |
176 | INIT_LIST_HEAD(&req->r_linger_item); |
177 | INIT_LIST_HEAD(&req->r_linger_osd); | |
935b639a | 178 | INIT_LIST_HEAD(&req->r_req_lru_item); |
cd43045c SW |
179 | INIT_LIST_HEAD(&req->r_osd_item); |
180 | ||
c16e7869 SW |
181 | /* create reply message */ |
182 | if (use_mempool) | |
183 | msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); | |
184 | else | |
185 | msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, | |
b61c2763 | 186 | OSD_OPREPLY_FRONT_LEN, gfp_flags, true); |
a79832f2 | 187 | if (!msg) { |
c16e7869 | 188 | ceph_osdc_put_request(req); |
a79832f2 | 189 | return NULL; |
c16e7869 SW |
190 | } |
191 | req->r_reply = msg; | |
192 | ||
c885837f | 193 | ceph_pagelist_init(&req->r_trail); |
d50b409f | 194 | |
c16e7869 | 195 | /* create request message; allow space for oid */ |
224736d9 | 196 | msg_size += MAX_OBJ_NAME_SIZE; |
f24e9980 SW |
197 | if (snapc) |
198 | msg_size += sizeof(u64) * snapc->num_snaps; | |
199 | if (use_mempool) | |
8f3bc053 | 200 | msg = ceph_msgpool_get(&osdc->msgpool_op, 0); |
f24e9980 | 201 | else |
b61c2763 | 202 | msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true); |
a79832f2 | 203 | if (!msg) { |
f24e9980 | 204 | ceph_osdc_put_request(req); |
a79832f2 | 205 | return NULL; |
f24e9980 | 206 | } |
68b4476b | 207 | |
f24e9980 | 208 | memset(msg->front.iov_base, 0, msg->front.iov_len); |
3499e8a5 YS |
209 | |
210 | req->r_request = msg; | |
3499e8a5 YS |
211 | |
212 | return req; | |
213 | } | |
3d14c5d2 | 214 | EXPORT_SYMBOL(ceph_osdc_alloc_request); |
3499e8a5 | 215 | |
68b4476b YS |
216 | static void osd_req_encode_op(struct ceph_osd_request *req, |
217 | struct ceph_osd_op *dst, | |
218 | struct ceph_osd_req_op *src) | |
219 | { | |
220 | dst->op = cpu_to_le16(src->op); | |
221 | ||
065a68f9 | 222 | switch (src->op) { |
68b4476b YS |
223 | case CEPH_OSD_OP_READ: |
224 | case CEPH_OSD_OP_WRITE: | |
225 | dst->extent.offset = | |
226 | cpu_to_le64(src->extent.offset); | |
227 | dst->extent.length = | |
228 | cpu_to_le64(src->extent.length); | |
229 | dst->extent.truncate_size = | |
230 | cpu_to_le64(src->extent.truncate_size); | |
231 | dst->extent.truncate_seq = | |
232 | cpu_to_le32(src->extent.truncate_seq); | |
233 | break; | |
234 | ||
235 | case CEPH_OSD_OP_GETXATTR: | |
236 | case CEPH_OSD_OP_SETXATTR: | |
237 | case CEPH_OSD_OP_CMPXATTR: | |
68b4476b YS |
238 | dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); |
239 | dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); | |
240 | dst->xattr.cmp_op = src->xattr.cmp_op; | |
241 | dst->xattr.cmp_mode = src->xattr.cmp_mode; | |
c885837f | 242 | ceph_pagelist_append(&req->r_trail, src->xattr.name, |
68b4476b | 243 | src->xattr.name_len); |
c885837f | 244 | ceph_pagelist_append(&req->r_trail, src->xattr.val, |
68b4476b YS |
245 | src->xattr.value_len); |
246 | break; | |
ae1533b6 | 247 | case CEPH_OSD_OP_CALL: |
ae1533b6 YS |
248 | dst->cls.class_len = src->cls.class_len; |
249 | dst->cls.method_len = src->cls.method_len; | |
250 | dst->cls.indata_len = cpu_to_le32(src->cls.indata_len); | |
251 | ||
c885837f | 252 | ceph_pagelist_append(&req->r_trail, src->cls.class_name, |
ae1533b6 | 253 | src->cls.class_len); |
c885837f | 254 | ceph_pagelist_append(&req->r_trail, src->cls.method_name, |
ae1533b6 | 255 | src->cls.method_len); |
c885837f | 256 | ceph_pagelist_append(&req->r_trail, src->cls.indata, |
ae1533b6 YS |
257 | src->cls.indata_len); |
258 | break; | |
259 | case CEPH_OSD_OP_ROLLBACK: | |
260 | dst->snap.snapid = cpu_to_le64(src->snap.snapid); | |
261 | break; | |
68b4476b YS |
262 | case CEPH_OSD_OP_STARTSYNC: |
263 | break; | |
a40c4f10 YS |
264 | case CEPH_OSD_OP_NOTIFY: |
265 | { | |
266 | __le32 prot_ver = cpu_to_le32(src->watch.prot_ver); | |
267 | __le32 timeout = cpu_to_le32(src->watch.timeout); | |
268 | ||
c885837f | 269 | ceph_pagelist_append(&req->r_trail, |
a40c4f10 | 270 | &prot_ver, sizeof(prot_ver)); |
c885837f | 271 | ceph_pagelist_append(&req->r_trail, |
a40c4f10 YS |
272 | &timeout, sizeof(timeout)); |
273 | } | |
274 | case CEPH_OSD_OP_NOTIFY_ACK: | |
275 | case CEPH_OSD_OP_WATCH: | |
276 | dst->watch.cookie = cpu_to_le64(src->watch.cookie); | |
277 | dst->watch.ver = cpu_to_le64(src->watch.ver); | |
278 | dst->watch.flag = src->watch.flag; | |
279 | break; | |
68b4476b YS |
280 | default: |
281 | pr_err("unrecognized osd opcode %d\n", dst->op); | |
282 | WARN_ON(1); | |
283 | break; | |
284 | } | |
285 | dst->payload_len = cpu_to_le32(src->payload_len); | |
286 | } | |
287 | ||
3499e8a5 YS |
288 | /* |
289 | * build new request AND message | |
290 | * | |
291 | */ | |
292 | void ceph_osdc_build_request(struct ceph_osd_request *req, | |
ae7ca4a3 | 293 | u64 off, u64 len, unsigned int num_op, |
68b4476b | 294 | struct ceph_osd_req_op *src_ops, |
4d6b250b | 295 | struct ceph_snap_context *snapc, u64 snap_id, |
af77f26c | 296 | struct timespec *mtime) |
3499e8a5 YS |
297 | { |
298 | struct ceph_msg *msg = req->r_request; | |
299 | struct ceph_osd_request_head *head; | |
68b4476b | 300 | struct ceph_osd_req_op *src_op; |
3499e8a5 YS |
301 | struct ceph_osd_op *op; |
302 | void *p; | |
3499e8a5 | 303 | size_t msg_size = sizeof(*head) + num_op*sizeof(*op); |
3499e8a5 | 304 | int flags = req->r_flags; |
68b4476b YS |
305 | u64 data_len = 0; |
306 | int i; | |
3499e8a5 | 307 | |
d178a9e7 AE |
308 | WARN_ON((flags & (CEPH_OSD_FLAG_READ|CEPH_OSD_FLAG_WRITE)) == 0); |
309 | ||
f24e9980 | 310 | head = msg->front.iov_base; |
4d6b250b | 311 | head->snapid = cpu_to_le64(snap_id); |
f24e9980 SW |
312 | op = (void *)(head + 1); |
313 | p = (void *)(op + num_op); | |
314 | ||
f24e9980 SW |
315 | req->r_snapc = ceph_get_snap_context(snapc); |
316 | ||
317 | head->client_inc = cpu_to_le32(1); /* always, for now. */ | |
318 | head->flags = cpu_to_le32(flags); | |
319 | if (flags & CEPH_OSD_FLAG_WRITE) | |
320 | ceph_encode_timespec(&head->mtime, mtime); | |
ae7ca4a3 | 321 | BUG_ON(num_op > (unsigned int) ((u16) -1)); |
f24e9980 | 322 | head->num_ops = cpu_to_le16(num_op); |
f24e9980 | 323 | |
f24e9980 | 324 | /* fill in oid */ |
af77f26c AE |
325 | head->object_len = cpu_to_le32(req->r_oid_len); |
326 | memcpy(p, req->r_oid, req->r_oid_len); | |
327 | p += req->r_oid_len; | |
f24e9980 | 328 | |
68b4476b | 329 | src_op = src_ops; |
ae7ca4a3 AE |
330 | while (num_op--) |
331 | osd_req_encode_op(req, op++, src_op++); | |
68b4476b | 332 | |
c885837f | 333 | data_len += req->r_trail.length; |
68b4476b | 334 | |
f24e9980 SW |
335 | if (snapc) { |
336 | head->snap_seq = cpu_to_le64(snapc->seq); | |
337 | head->num_snaps = cpu_to_le32(snapc->num_snaps); | |
338 | for (i = 0; i < snapc->num_snaps; i++) { | |
339 | put_unaligned_le64(snapc->snaps[i], p); | |
340 | p += sizeof(u64); | |
341 | } | |
342 | } | |
343 | ||
68b4476b YS |
344 | if (flags & CEPH_OSD_FLAG_WRITE) { |
345 | req->r_request->hdr.data_off = cpu_to_le16(off); | |
0120be3c | 346 | req->r_request->hdr.data_len = cpu_to_le32(len + data_len); |
68b4476b YS |
347 | } else if (data_len) { |
348 | req->r_request->hdr.data_off = 0; | |
349 | req->r_request->hdr.data_len = cpu_to_le32(data_len); | |
350 | } | |
351 | ||
c5c6b19d SW |
352 | req->r_request->page_alignment = req->r_page_alignment; |
353 | ||
f24e9980 | 354 | BUG_ON(p > msg->front.iov_base + msg->front.iov_len); |
6f863e71 SW |
355 | msg_size = p - msg->front.iov_base; |
356 | msg->front.iov_len = msg_size; | |
357 | msg->hdr.front_len = cpu_to_le32(msg_size); | |
3499e8a5 YS |
358 | return; |
359 | } | |
3d14c5d2 | 360 | EXPORT_SYMBOL(ceph_osdc_build_request); |
3499e8a5 YS |
361 | |
362 | /* | |
363 | * build new request AND message, calculate layout, and adjust file | |
364 | * extent as needed. | |
365 | * | |
366 | * if the file was recently truncated, we include information about its | |
367 | * old and new size so that the object can be updated appropriately. (we | |
368 | * avoid synchronously deleting truncated objects because it's slow.) | |
369 | * | |
370 | * if @do_sync, include a 'startsync' command so that the osd will flush | |
371 | * data quickly. | |
372 | */ | |
373 | struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, | |
374 | struct ceph_file_layout *layout, | |
375 | struct ceph_vino vino, | |
376 | u64 off, u64 *plen, | |
377 | int opcode, int flags, | |
378 | struct ceph_snap_context *snapc, | |
379 | int do_sync, | |
380 | u32 truncate_seq, | |
381 | u64 truncate_size, | |
382 | struct timespec *mtime, | |
a3bea47e | 383 | bool use_mempool, |
b7495fc2 | 384 | int page_align) |
3499e8a5 | 385 | { |
ae7ca4a3 | 386 | struct ceph_osd_req_op ops[2]; |
68b4476b | 387 | struct ceph_osd_request *req; |
ae7ca4a3 | 388 | unsigned int num_op = 1; |
6816282d | 389 | int r; |
68b4476b | 390 | |
ae7ca4a3 AE |
391 | memset(&ops, 0, sizeof ops); |
392 | ||
68b4476b YS |
393 | ops[0].op = opcode; |
394 | ops[0].extent.truncate_seq = truncate_seq; | |
395 | ops[0].extent.truncate_size = truncate_size; | |
68b4476b YS |
396 | |
397 | if (do_sync) { | |
398 | ops[1].op = CEPH_OSD_OP_STARTSYNC; | |
ae7ca4a3 AE |
399 | num_op++; |
400 | } | |
68b4476b | 401 | |
ae7ca4a3 AE |
402 | req = ceph_osdc_alloc_request(osdc, snapc, num_op, use_mempool, |
403 | GFP_NOFS); | |
4ad12621 | 404 | if (!req) |
6816282d | 405 | return ERR_PTR(-ENOMEM); |
d178a9e7 | 406 | req->r_flags = flags; |
3499e8a5 YS |
407 | |
408 | /* calculate max write size */ | |
e75b45cf | 409 | r = calc_layout(vino, layout, off, plen, req, ops); |
6816282d SW |
410 | if (r < 0) |
411 | return ERR_PTR(r); | |
3499e8a5 YS |
412 | req->r_file_layout = *layout; /* keep a copy */ |
413 | ||
9bb0ce2b SW |
414 | /* in case it differs from natural (file) alignment that |
415 | calc_layout filled in for us */ | |
416 | req->r_num_pages = calc_pages_for(page_align, *plen); | |
b7495fc2 SW |
417 | req->r_page_alignment = page_align; |
418 | ||
ae7ca4a3 AE |
419 | ceph_osdc_build_request(req, off, *plen, num_op, ops, |
420 | snapc, vino.snap, mtime); | |
3499e8a5 | 421 | |
f24e9980 SW |
422 | return req; |
423 | } | |
3d14c5d2 | 424 | EXPORT_SYMBOL(ceph_osdc_new_request); |
f24e9980 SW |
425 | |
426 | /* | |
427 | * We keep osd requests in an rbtree, sorted by ->r_tid. | |
428 | */ | |
429 | static void __insert_request(struct ceph_osd_client *osdc, | |
430 | struct ceph_osd_request *new) | |
431 | { | |
432 | struct rb_node **p = &osdc->requests.rb_node; | |
433 | struct rb_node *parent = NULL; | |
434 | struct ceph_osd_request *req = NULL; | |
435 | ||
436 | while (*p) { | |
437 | parent = *p; | |
438 | req = rb_entry(parent, struct ceph_osd_request, r_node); | |
439 | if (new->r_tid < req->r_tid) | |
440 | p = &(*p)->rb_left; | |
441 | else if (new->r_tid > req->r_tid) | |
442 | p = &(*p)->rb_right; | |
443 | else | |
444 | BUG(); | |
445 | } | |
446 | ||
447 | rb_link_node(&new->r_node, parent, p); | |
448 | rb_insert_color(&new->r_node, &osdc->requests); | |
449 | } | |
450 | ||
451 | static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc, | |
452 | u64 tid) | |
453 | { | |
454 | struct ceph_osd_request *req; | |
455 | struct rb_node *n = osdc->requests.rb_node; | |
456 | ||
457 | while (n) { | |
458 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
459 | if (tid < req->r_tid) | |
460 | n = n->rb_left; | |
461 | else if (tid > req->r_tid) | |
462 | n = n->rb_right; | |
463 | else | |
464 | return req; | |
465 | } | |
466 | return NULL; | |
467 | } | |
468 | ||
469 | static struct ceph_osd_request * | |
470 | __lookup_request_ge(struct ceph_osd_client *osdc, | |
471 | u64 tid) | |
472 | { | |
473 | struct ceph_osd_request *req; | |
474 | struct rb_node *n = osdc->requests.rb_node; | |
475 | ||
476 | while (n) { | |
477 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
478 | if (tid < req->r_tid) { | |
479 | if (!n->rb_left) | |
480 | return req; | |
481 | n = n->rb_left; | |
482 | } else if (tid > req->r_tid) { | |
483 | n = n->rb_right; | |
484 | } else { | |
485 | return req; | |
486 | } | |
487 | } | |
488 | return NULL; | |
489 | } | |
490 | ||
6f6c7006 SW |
491 | /* |
492 | * Resubmit requests pending on the given osd. | |
493 | */ | |
494 | static void __kick_osd_requests(struct ceph_osd_client *osdc, | |
495 | struct ceph_osd *osd) | |
496 | { | |
a40c4f10 | 497 | struct ceph_osd_request *req, *nreq; |
6f6c7006 SW |
498 | int err; |
499 | ||
500 | dout("__kick_osd_requests osd%d\n", osd->o_osd); | |
501 | err = __reset_osd(osdc, osd); | |
685a7555 | 502 | if (err) |
6f6c7006 SW |
503 | return; |
504 | ||
505 | list_for_each_entry(req, &osd->o_requests, r_osd_item) { | |
506 | list_move(&req->r_req_lru_item, &osdc->req_unsent); | |
507 | dout("requeued %p tid %llu osd%d\n", req, req->r_tid, | |
508 | osd->o_osd); | |
a40c4f10 YS |
509 | if (!req->r_linger) |
510 | req->r_flags |= CEPH_OSD_FLAG_RETRY; | |
511 | } | |
512 | ||
513 | list_for_each_entry_safe(req, nreq, &osd->o_linger_requests, | |
514 | r_linger_osd) { | |
77f38e0e SW |
515 | /* |
516 | * reregister request prior to unregistering linger so | |
517 | * that r_osd is preserved. | |
518 | */ | |
519 | BUG_ON(!list_empty(&req->r_req_lru_item)); | |
a40c4f10 | 520 | __register_request(osdc, req); |
77f38e0e SW |
521 | list_add(&req->r_req_lru_item, &osdc->req_unsent); |
522 | list_add(&req->r_osd_item, &req->r_osd->o_requests); | |
523 | __unregister_linger_request(osdc, req); | |
a40c4f10 YS |
524 | dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid, |
525 | osd->o_osd); | |
6f6c7006 SW |
526 | } |
527 | } | |
528 | ||
f24e9980 | 529 | /* |
81b024e7 | 530 | * If the osd connection drops, we need to resubmit all requests. |
f24e9980 SW |
531 | */ |
532 | static void osd_reset(struct ceph_connection *con) | |
533 | { | |
534 | struct ceph_osd *osd = con->private; | |
535 | struct ceph_osd_client *osdc; | |
536 | ||
537 | if (!osd) | |
538 | return; | |
539 | dout("osd_reset osd%d\n", osd->o_osd); | |
540 | osdc = osd->o_osdc; | |
f24e9980 | 541 | down_read(&osdc->map_sem); |
83aff95e SW |
542 | mutex_lock(&osdc->request_mutex); |
543 | __kick_osd_requests(osdc, osd); | |
f9d25199 | 544 | __send_queued(osdc); |
83aff95e | 545 | mutex_unlock(&osdc->request_mutex); |
f24e9980 SW |
546 | up_read(&osdc->map_sem); |
547 | } | |
548 | ||
549 | /* | |
550 | * Track open sessions with osds. | |
551 | */ | |
e10006f8 | 552 | static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum) |
f24e9980 SW |
553 | { |
554 | struct ceph_osd *osd; | |
555 | ||
556 | osd = kzalloc(sizeof(*osd), GFP_NOFS); | |
557 | if (!osd) | |
558 | return NULL; | |
559 | ||
560 | atomic_set(&osd->o_ref, 1); | |
561 | osd->o_osdc = osdc; | |
e10006f8 | 562 | osd->o_osd = onum; |
f407731d | 563 | RB_CLEAR_NODE(&osd->o_node); |
f24e9980 | 564 | INIT_LIST_HEAD(&osd->o_requests); |
a40c4f10 | 565 | INIT_LIST_HEAD(&osd->o_linger_requests); |
f5a2041b | 566 | INIT_LIST_HEAD(&osd->o_osd_lru); |
f24e9980 SW |
567 | osd->o_incarnation = 1; |
568 | ||
b7a9e5dd | 569 | ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); |
4e7a5dcd | 570 | |
422d2cb8 | 571 | INIT_LIST_HEAD(&osd->o_keepalive_item); |
f24e9980 SW |
572 | return osd; |
573 | } | |
574 | ||
575 | static struct ceph_osd *get_osd(struct ceph_osd *osd) | |
576 | { | |
577 | if (atomic_inc_not_zero(&osd->o_ref)) { | |
578 | dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1, | |
579 | atomic_read(&osd->o_ref)); | |
580 | return osd; | |
581 | } else { | |
582 | dout("get_osd %p FAIL\n", osd); | |
583 | return NULL; | |
584 | } | |
585 | } | |
586 | ||
587 | static void put_osd(struct ceph_osd *osd) | |
588 | { | |
589 | dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref), | |
590 | atomic_read(&osd->o_ref) - 1); | |
a255651d | 591 | if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) { |
79494d1b SW |
592 | struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth; |
593 | ||
a255651d | 594 | if (ac->ops && ac->ops->destroy_authorizer) |
6c4a1915 | 595 | ac->ops->destroy_authorizer(ac, osd->o_auth.authorizer); |
f24e9980 | 596 | kfree(osd); |
79494d1b | 597 | } |
f24e9980 SW |
598 | } |
599 | ||
600 | /* | |
601 | * remove an osd from our map | |
602 | */ | |
f5a2041b | 603 | static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) |
f24e9980 | 604 | { |
f5a2041b | 605 | dout("__remove_osd %p\n", osd); |
f24e9980 SW |
606 | BUG_ON(!list_empty(&osd->o_requests)); |
607 | rb_erase(&osd->o_node, &osdc->osds); | |
f5a2041b | 608 | list_del_init(&osd->o_osd_lru); |
f24e9980 SW |
609 | ceph_con_close(&osd->o_con); |
610 | put_osd(osd); | |
611 | } | |
612 | ||
aca420bc SW |
613 | static void remove_all_osds(struct ceph_osd_client *osdc) |
614 | { | |
048a9d2d | 615 | dout("%s %p\n", __func__, osdc); |
aca420bc SW |
616 | mutex_lock(&osdc->request_mutex); |
617 | while (!RB_EMPTY_ROOT(&osdc->osds)) { | |
618 | struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), | |
619 | struct ceph_osd, o_node); | |
620 | __remove_osd(osdc, osd); | |
621 | } | |
622 | mutex_unlock(&osdc->request_mutex); | |
623 | } | |
624 | ||
f5a2041b YS |
625 | static void __move_osd_to_lru(struct ceph_osd_client *osdc, |
626 | struct ceph_osd *osd) | |
627 | { | |
628 | dout("__move_osd_to_lru %p\n", osd); | |
629 | BUG_ON(!list_empty(&osd->o_osd_lru)); | |
630 | list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); | |
3d14c5d2 | 631 | osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ; |
f5a2041b YS |
632 | } |
633 | ||
634 | static void __remove_osd_from_lru(struct ceph_osd *osd) | |
635 | { | |
636 | dout("__remove_osd_from_lru %p\n", osd); | |
637 | if (!list_empty(&osd->o_osd_lru)) | |
638 | list_del_init(&osd->o_osd_lru); | |
639 | } | |
640 | ||
aca420bc | 641 | static void remove_old_osds(struct ceph_osd_client *osdc) |
f5a2041b YS |
642 | { |
643 | struct ceph_osd *osd, *nosd; | |
644 | ||
645 | dout("__remove_old_osds %p\n", osdc); | |
646 | mutex_lock(&osdc->request_mutex); | |
647 | list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { | |
aca420bc | 648 | if (time_before(jiffies, osd->lru_ttl)) |
f5a2041b YS |
649 | break; |
650 | __remove_osd(osdc, osd); | |
651 | } | |
652 | mutex_unlock(&osdc->request_mutex); | |
653 | } | |
654 | ||
f24e9980 SW |
655 | /* |
656 | * reset osd connect | |
657 | */ | |
f5a2041b | 658 | static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) |
f24e9980 | 659 | { |
c3acb181 | 660 | struct ceph_entity_addr *peer_addr; |
f24e9980 | 661 | |
f5a2041b | 662 | dout("__reset_osd %p osd%d\n", osd, osd->o_osd); |
a40c4f10 YS |
663 | if (list_empty(&osd->o_requests) && |
664 | list_empty(&osd->o_linger_requests)) { | |
f5a2041b | 665 | __remove_osd(osdc, osd); |
c3acb181 AE |
666 | |
667 | return -ENODEV; | |
668 | } | |
669 | ||
670 | peer_addr = &osdc->osdmap->osd_addr[osd->o_osd]; | |
671 | if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) && | |
672 | !ceph_con_opened(&osd->o_con)) { | |
673 | struct ceph_osd_request *req; | |
674 | ||
87b315a5 SW |
675 | dout(" osd addr hasn't changed and connection never opened," |
676 | " letting msgr retry"); | |
677 | /* touch each r_stamp for handle_timeout()'s benfit */ | |
678 | list_for_each_entry(req, &osd->o_requests, r_osd_item) | |
679 | req->r_stamp = jiffies; | |
c3acb181 AE |
680 | |
681 | return -EAGAIN; | |
f24e9980 | 682 | } |
c3acb181 AE |
683 | |
684 | ceph_con_close(&osd->o_con); | |
685 | ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr); | |
686 | osd->o_incarnation++; | |
687 | ||
688 | return 0; | |
f24e9980 SW |
689 | } |
690 | ||
691 | static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new) | |
692 | { | |
693 | struct rb_node **p = &osdc->osds.rb_node; | |
694 | struct rb_node *parent = NULL; | |
695 | struct ceph_osd *osd = NULL; | |
696 | ||
aca420bc | 697 | dout("__insert_osd %p osd%d\n", new, new->o_osd); |
f24e9980 SW |
698 | while (*p) { |
699 | parent = *p; | |
700 | osd = rb_entry(parent, struct ceph_osd, o_node); | |
701 | if (new->o_osd < osd->o_osd) | |
702 | p = &(*p)->rb_left; | |
703 | else if (new->o_osd > osd->o_osd) | |
704 | p = &(*p)->rb_right; | |
705 | else | |
706 | BUG(); | |
707 | } | |
708 | ||
709 | rb_link_node(&new->o_node, parent, p); | |
710 | rb_insert_color(&new->o_node, &osdc->osds); | |
711 | } | |
712 | ||
713 | static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o) | |
714 | { | |
715 | struct ceph_osd *osd; | |
716 | struct rb_node *n = osdc->osds.rb_node; | |
717 | ||
718 | while (n) { | |
719 | osd = rb_entry(n, struct ceph_osd, o_node); | |
720 | if (o < osd->o_osd) | |
721 | n = n->rb_left; | |
722 | else if (o > osd->o_osd) | |
723 | n = n->rb_right; | |
724 | else | |
725 | return osd; | |
726 | } | |
727 | return NULL; | |
728 | } | |
729 | ||
422d2cb8 YS |
730 | static void __schedule_osd_timeout(struct ceph_osd_client *osdc) |
731 | { | |
732 | schedule_delayed_work(&osdc->timeout_work, | |
3d14c5d2 | 733 | osdc->client->options->osd_keepalive_timeout * HZ); |
422d2cb8 YS |
734 | } |
735 | ||
736 | static void __cancel_osd_timeout(struct ceph_osd_client *osdc) | |
737 | { | |
738 | cancel_delayed_work(&osdc->timeout_work); | |
739 | } | |
f24e9980 SW |
740 | |
741 | /* | |
742 | * Register request, assign tid. If this is the first request, set up | |
743 | * the timeout event. | |
744 | */ | |
a40c4f10 YS |
745 | static void __register_request(struct ceph_osd_client *osdc, |
746 | struct ceph_osd_request *req) | |
f24e9980 | 747 | { |
f24e9980 | 748 | req->r_tid = ++osdc->last_tid; |
6df058c0 | 749 | req->r_request->hdr.tid = cpu_to_le64(req->r_tid); |
77f38e0e | 750 | dout("__register_request %p tid %lld\n", req, req->r_tid); |
f24e9980 SW |
751 | __insert_request(osdc, req); |
752 | ceph_osdc_get_request(req); | |
753 | osdc->num_requests++; | |
f24e9980 | 754 | if (osdc->num_requests == 1) { |
422d2cb8 YS |
755 | dout(" first request, scheduling timeout\n"); |
756 | __schedule_osd_timeout(osdc); | |
f24e9980 | 757 | } |
a40c4f10 YS |
758 | } |
759 | ||
760 | static void register_request(struct ceph_osd_client *osdc, | |
761 | struct ceph_osd_request *req) | |
762 | { | |
763 | mutex_lock(&osdc->request_mutex); | |
764 | __register_request(osdc, req); | |
f24e9980 SW |
765 | mutex_unlock(&osdc->request_mutex); |
766 | } | |
767 | ||
768 | /* | |
769 | * called under osdc->request_mutex | |
770 | */ | |
771 | static void __unregister_request(struct ceph_osd_client *osdc, | |
772 | struct ceph_osd_request *req) | |
773 | { | |
35f9f8a0 SW |
774 | if (RB_EMPTY_NODE(&req->r_node)) { |
775 | dout("__unregister_request %p tid %lld not registered\n", | |
776 | req, req->r_tid); | |
777 | return; | |
778 | } | |
779 | ||
f24e9980 SW |
780 | dout("__unregister_request %p tid %lld\n", req, req->r_tid); |
781 | rb_erase(&req->r_node, &osdc->requests); | |
782 | osdc->num_requests--; | |
783 | ||
0ba6478d SW |
784 | if (req->r_osd) { |
785 | /* make sure the original request isn't in flight. */ | |
6740a845 | 786 | ceph_msg_revoke(req->r_request); |
0ba6478d SW |
787 | |
788 | list_del_init(&req->r_osd_item); | |
a40c4f10 YS |
789 | if (list_empty(&req->r_osd->o_requests) && |
790 | list_empty(&req->r_osd->o_linger_requests)) { | |
791 | dout("moving osd to %p lru\n", req->r_osd); | |
f5a2041b | 792 | __move_osd_to_lru(osdc, req->r_osd); |
a40c4f10 | 793 | } |
fbdb9190 | 794 | if (list_empty(&req->r_linger_item)) |
a40c4f10 | 795 | req->r_osd = NULL; |
0ba6478d | 796 | } |
f24e9980 | 797 | |
7d5f2481 | 798 | list_del_init(&req->r_req_lru_item); |
f24e9980 SW |
799 | ceph_osdc_put_request(req); |
800 | ||
422d2cb8 YS |
801 | if (osdc->num_requests == 0) { |
802 | dout(" no requests, canceling timeout\n"); | |
803 | __cancel_osd_timeout(osdc); | |
f24e9980 SW |
804 | } |
805 | } | |
806 | ||
807 | /* | |
808 | * Cancel a previously queued request message | |
809 | */ | |
810 | static void __cancel_request(struct ceph_osd_request *req) | |
811 | { | |
6bc18876 | 812 | if (req->r_sent && req->r_osd) { |
6740a845 | 813 | ceph_msg_revoke(req->r_request); |
f24e9980 SW |
814 | req->r_sent = 0; |
815 | } | |
816 | } | |
817 | ||
a40c4f10 YS |
818 | static void __register_linger_request(struct ceph_osd_client *osdc, |
819 | struct ceph_osd_request *req) | |
820 | { | |
821 | dout("__register_linger_request %p\n", req); | |
822 | list_add_tail(&req->r_linger_item, &osdc->req_linger); | |
6194ea89 SW |
823 | if (req->r_osd) |
824 | list_add_tail(&req->r_linger_osd, | |
825 | &req->r_osd->o_linger_requests); | |
a40c4f10 YS |
826 | } |
827 | ||
828 | static void __unregister_linger_request(struct ceph_osd_client *osdc, | |
829 | struct ceph_osd_request *req) | |
830 | { | |
831 | dout("__unregister_linger_request %p\n", req); | |
61c74035 | 832 | list_del_init(&req->r_linger_item); |
a40c4f10 | 833 | if (req->r_osd) { |
a40c4f10 YS |
834 | list_del_init(&req->r_linger_osd); |
835 | ||
836 | if (list_empty(&req->r_osd->o_requests) && | |
837 | list_empty(&req->r_osd->o_linger_requests)) { | |
838 | dout("moving osd to %p lru\n", req->r_osd); | |
839 | __move_osd_to_lru(osdc, req->r_osd); | |
840 | } | |
fbdb9190 SW |
841 | if (list_empty(&req->r_osd_item)) |
842 | req->r_osd = NULL; | |
a40c4f10 YS |
843 | } |
844 | } | |
845 | ||
846 | void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc, | |
847 | struct ceph_osd_request *req) | |
848 | { | |
849 | mutex_lock(&osdc->request_mutex); | |
850 | if (req->r_linger) { | |
851 | __unregister_linger_request(osdc, req); | |
852 | ceph_osdc_put_request(req); | |
853 | } | |
854 | mutex_unlock(&osdc->request_mutex); | |
855 | } | |
856 | EXPORT_SYMBOL(ceph_osdc_unregister_linger_request); | |
857 | ||
858 | void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc, | |
859 | struct ceph_osd_request *req) | |
860 | { | |
861 | if (!req->r_linger) { | |
862 | dout("set_request_linger %p\n", req); | |
863 | req->r_linger = 1; | |
864 | /* | |
865 | * caller is now responsible for calling | |
866 | * unregister_linger_request | |
867 | */ | |
868 | ceph_osdc_get_request(req); | |
869 | } | |
870 | } | |
871 | EXPORT_SYMBOL(ceph_osdc_set_request_linger); | |
872 | ||
f24e9980 SW |
873 | /* |
874 | * Pick an osd (the first 'up' osd in the pg), allocate the osd struct | |
875 | * (as needed), and set the request r_osd appropriately. If there is | |
25985edc | 876 | * no up osd, set r_osd to NULL. Move the request to the appropriate list |
6f6c7006 | 877 | * (unsent, homeless) or leave on in-flight lru. |
f24e9980 SW |
878 | * |
879 | * Return 0 if unchanged, 1 if changed, or negative on error. | |
880 | * | |
881 | * Caller should hold map_sem for read and request_mutex. | |
882 | */ | |
6f6c7006 | 883 | static int __map_request(struct ceph_osd_client *osdc, |
38d6453c | 884 | struct ceph_osd_request *req, int force_resend) |
f24e9980 SW |
885 | { |
886 | struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base; | |
51042122 | 887 | struct ceph_pg pgid; |
d85b7056 SW |
888 | int acting[CEPH_PG_MAX_SIZE]; |
889 | int o = -1, num = 0; | |
f24e9980 | 890 | int err; |
f24e9980 | 891 | |
6f6c7006 | 892 | dout("map_request %p tid %lld\n", req, req->r_tid); |
f24e9980 SW |
893 | err = ceph_calc_object_layout(&reqhead->layout, req->r_oid, |
894 | &req->r_file_layout, osdc->osdmap); | |
6f6c7006 SW |
895 | if (err) { |
896 | list_move(&req->r_req_lru_item, &osdc->req_notarget); | |
f24e9980 | 897 | return err; |
6f6c7006 | 898 | } |
51042122 | 899 | pgid = reqhead->layout.ol_pgid; |
7740a42f SW |
900 | req->r_pgid = pgid; |
901 | ||
d85b7056 SW |
902 | err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting); |
903 | if (err > 0) { | |
904 | o = acting[0]; | |
905 | num = err; | |
906 | } | |
f24e9980 | 907 | |
38d6453c SW |
908 | if ((!force_resend && |
909 | req->r_osd && req->r_osd->o_osd == o && | |
d85b7056 SW |
910 | req->r_sent >= req->r_osd->o_incarnation && |
911 | req->r_num_pg_osds == num && | |
912 | memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) || | |
f24e9980 SW |
913 | (req->r_osd == NULL && o == -1)) |
914 | return 0; /* no change */ | |
915 | ||
6f6c7006 | 916 | dout("map_request tid %llu pgid %d.%x osd%d (was osd%d)\n", |
51042122 | 917 | req->r_tid, le32_to_cpu(pgid.pool), le16_to_cpu(pgid.ps), o, |
f24e9980 SW |
918 | req->r_osd ? req->r_osd->o_osd : -1); |
919 | ||
d85b7056 SW |
920 | /* record full pg acting set */ |
921 | memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num); | |
922 | req->r_num_pg_osds = num; | |
923 | ||
f24e9980 SW |
924 | if (req->r_osd) { |
925 | __cancel_request(req); | |
926 | list_del_init(&req->r_osd_item); | |
f24e9980 SW |
927 | req->r_osd = NULL; |
928 | } | |
929 | ||
930 | req->r_osd = __lookup_osd(osdc, o); | |
931 | if (!req->r_osd && o >= 0) { | |
c99eb1c7 | 932 | err = -ENOMEM; |
e10006f8 | 933 | req->r_osd = create_osd(osdc, o); |
6f6c7006 SW |
934 | if (!req->r_osd) { |
935 | list_move(&req->r_req_lru_item, &osdc->req_notarget); | |
c99eb1c7 | 936 | goto out; |
6f6c7006 | 937 | } |
f24e9980 | 938 | |
6f6c7006 | 939 | dout("map_request osd %p is osd%d\n", req->r_osd, o); |
f24e9980 SW |
940 | __insert_osd(osdc, req->r_osd); |
941 | ||
b7a9e5dd SW |
942 | ceph_con_open(&req->r_osd->o_con, |
943 | CEPH_ENTITY_TYPE_OSD, o, | |
944 | &osdc->osdmap->osd_addr[o]); | |
f24e9980 SW |
945 | } |
946 | ||
f5a2041b YS |
947 | if (req->r_osd) { |
948 | __remove_osd_from_lru(req->r_osd); | |
f24e9980 | 949 | list_add(&req->r_osd_item, &req->r_osd->o_requests); |
6f6c7006 SW |
950 | list_move(&req->r_req_lru_item, &osdc->req_unsent); |
951 | } else { | |
952 | list_move(&req->r_req_lru_item, &osdc->req_notarget); | |
f5a2041b | 953 | } |
d85b7056 | 954 | err = 1; /* osd or pg changed */ |
f24e9980 SW |
955 | |
956 | out: | |
f24e9980 SW |
957 | return err; |
958 | } | |
959 | ||
960 | /* | |
961 | * caller should hold map_sem (for read) and request_mutex | |
962 | */ | |
56e925b6 SW |
963 | static void __send_request(struct ceph_osd_client *osdc, |
964 | struct ceph_osd_request *req) | |
f24e9980 SW |
965 | { |
966 | struct ceph_osd_request_head *reqhead; | |
f24e9980 SW |
967 | |
968 | dout("send_request %p tid %llu to osd%d flags %d\n", | |
969 | req, req->r_tid, req->r_osd->o_osd, req->r_flags); | |
970 | ||
971 | reqhead = req->r_request->front.iov_base; | |
972 | reqhead->osdmap_epoch = cpu_to_le32(osdc->osdmap->epoch); | |
973 | reqhead->flags |= cpu_to_le32(req->r_flags); /* e.g., RETRY */ | |
974 | reqhead->reassert_version = req->r_reassert_version; | |
975 | ||
3dd72fc0 | 976 | req->r_stamp = jiffies; |
07a27e22 | 977 | list_move_tail(&req->r_req_lru_item, &osdc->req_lru); |
f24e9980 SW |
978 | |
979 | ceph_msg_get(req->r_request); /* send consumes a ref */ | |
980 | ceph_con_send(&req->r_osd->o_con, req->r_request); | |
981 | req->r_sent = req->r_osd->o_incarnation; | |
f24e9980 SW |
982 | } |
983 | ||
6f6c7006 SW |
984 | /* |
985 | * Send any requests in the queue (req_unsent). | |
986 | */ | |
f9d25199 | 987 | static void __send_queued(struct ceph_osd_client *osdc) |
6f6c7006 SW |
988 | { |
989 | struct ceph_osd_request *req, *tmp; | |
990 | ||
f9d25199 AE |
991 | dout("__send_queued\n"); |
992 | list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item) | |
6f6c7006 | 993 | __send_request(osdc, req); |
6f6c7006 SW |
994 | } |
995 | ||
f24e9980 SW |
996 | /* |
997 | * Timeout callback, called every N seconds when 1 or more osd | |
998 | * requests has been active for more than N seconds. When this | |
999 | * happens, we ping all OSDs with requests who have timed out to | |
1000 | * ensure any communications channel reset is detected. Reset the | |
1001 | * request timeouts another N seconds in the future as we go. | |
1002 | * Reschedule the timeout event another N seconds in future (unless | |
1003 | * there are no open requests). | |
1004 | */ | |
1005 | static void handle_timeout(struct work_struct *work) | |
1006 | { | |
1007 | struct ceph_osd_client *osdc = | |
1008 | container_of(work, struct ceph_osd_client, timeout_work.work); | |
83aff95e | 1009 | struct ceph_osd_request *req; |
f24e9980 | 1010 | struct ceph_osd *osd; |
422d2cb8 | 1011 | unsigned long keepalive = |
3d14c5d2 | 1012 | osdc->client->options->osd_keepalive_timeout * HZ; |
422d2cb8 | 1013 | struct list_head slow_osds; |
f24e9980 SW |
1014 | dout("timeout\n"); |
1015 | down_read(&osdc->map_sem); | |
1016 | ||
1017 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1018 | ||
1019 | mutex_lock(&osdc->request_mutex); | |
f24e9980 | 1020 | |
422d2cb8 YS |
1021 | /* |
1022 | * ping osds that are a bit slow. this ensures that if there | |
1023 | * is a break in the TCP connection we will notice, and reopen | |
1024 | * a connection with that osd (from the fault callback). | |
1025 | */ | |
1026 | INIT_LIST_HEAD(&slow_osds); | |
1027 | list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) { | |
3dd72fc0 | 1028 | if (time_before(jiffies, req->r_stamp + keepalive)) |
422d2cb8 YS |
1029 | break; |
1030 | ||
1031 | osd = req->r_osd; | |
1032 | BUG_ON(!osd); | |
1033 | dout(" tid %llu is slow, will send keepalive on osd%d\n", | |
f24e9980 | 1034 | req->r_tid, osd->o_osd); |
422d2cb8 YS |
1035 | list_move_tail(&osd->o_keepalive_item, &slow_osds); |
1036 | } | |
1037 | while (!list_empty(&slow_osds)) { | |
1038 | osd = list_entry(slow_osds.next, struct ceph_osd, | |
1039 | o_keepalive_item); | |
1040 | list_del_init(&osd->o_keepalive_item); | |
f24e9980 SW |
1041 | ceph_con_keepalive(&osd->o_con); |
1042 | } | |
1043 | ||
422d2cb8 | 1044 | __schedule_osd_timeout(osdc); |
f9d25199 | 1045 | __send_queued(osdc); |
f24e9980 | 1046 | mutex_unlock(&osdc->request_mutex); |
f24e9980 SW |
1047 | up_read(&osdc->map_sem); |
1048 | } | |
1049 | ||
f5a2041b YS |
1050 | static void handle_osds_timeout(struct work_struct *work) |
1051 | { | |
1052 | struct ceph_osd_client *osdc = | |
1053 | container_of(work, struct ceph_osd_client, | |
1054 | osds_timeout_work.work); | |
1055 | unsigned long delay = | |
3d14c5d2 | 1056 | osdc->client->options->osd_idle_ttl * HZ >> 2; |
f5a2041b YS |
1057 | |
1058 | dout("osds timeout\n"); | |
1059 | down_read(&osdc->map_sem); | |
aca420bc | 1060 | remove_old_osds(osdc); |
f5a2041b YS |
1061 | up_read(&osdc->map_sem); |
1062 | ||
1063 | schedule_delayed_work(&osdc->osds_timeout_work, | |
1064 | round_jiffies_relative(delay)); | |
1065 | } | |
1066 | ||
25845472 SW |
1067 | static void complete_request(struct ceph_osd_request *req) |
1068 | { | |
1069 | if (req->r_safe_callback) | |
1070 | req->r_safe_callback(req, NULL); | |
1071 | complete_all(&req->r_safe_completion); /* fsync waiter */ | |
1072 | } | |
1073 | ||
f24e9980 SW |
1074 | /* |
1075 | * handle osd op reply. either call the callback if it is specified, | |
1076 | * or do the completion to wake up the waiting thread. | |
1077 | */ | |
350b1c32 SW |
1078 | static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg, |
1079 | struct ceph_connection *con) | |
f24e9980 SW |
1080 | { |
1081 | struct ceph_osd_reply_head *rhead = msg->front.iov_base; | |
1082 | struct ceph_osd_request *req; | |
1083 | u64 tid; | |
1084 | int numops, object_len, flags; | |
0ceed5db | 1085 | s32 result; |
f24e9980 | 1086 | |
6df058c0 | 1087 | tid = le64_to_cpu(msg->hdr.tid); |
f24e9980 SW |
1088 | if (msg->front.iov_len < sizeof(*rhead)) |
1089 | goto bad; | |
f24e9980 SW |
1090 | numops = le32_to_cpu(rhead->num_ops); |
1091 | object_len = le32_to_cpu(rhead->object_len); | |
0ceed5db | 1092 | result = le32_to_cpu(rhead->result); |
f24e9980 SW |
1093 | if (msg->front.iov_len != sizeof(*rhead) + object_len + |
1094 | numops * sizeof(struct ceph_osd_op)) | |
1095 | goto bad; | |
0ceed5db | 1096 | dout("handle_reply %p tid %llu result %d\n", msg, tid, (int)result); |
f24e9980 SW |
1097 | /* lookup */ |
1098 | mutex_lock(&osdc->request_mutex); | |
1099 | req = __lookup_request(osdc, tid); | |
1100 | if (req == NULL) { | |
1101 | dout("handle_reply tid %llu dne\n", tid); | |
1102 | mutex_unlock(&osdc->request_mutex); | |
1103 | return; | |
1104 | } | |
1105 | ceph_osdc_get_request(req); | |
1106 | flags = le32_to_cpu(rhead->flags); | |
1107 | ||
350b1c32 | 1108 | /* |
0d59ab81 | 1109 | * if this connection filled our message, drop our reference now, to |
350b1c32 SW |
1110 | * avoid a (safe but slower) revoke later. |
1111 | */ | |
0d59ab81 | 1112 | if (req->r_con_filling_msg == con && req->r_reply == msg) { |
c16e7869 | 1113 | dout(" dropping con_filling_msg ref %p\n", con); |
0d59ab81 | 1114 | req->r_con_filling_msg = NULL; |
0d47766f | 1115 | con->ops->put(con); |
350b1c32 SW |
1116 | } |
1117 | ||
f24e9980 | 1118 | if (!req->r_got_reply) { |
95c96174 | 1119 | unsigned int bytes; |
f24e9980 SW |
1120 | |
1121 | req->r_result = le32_to_cpu(rhead->result); | |
1122 | bytes = le32_to_cpu(msg->hdr.data_len); | |
1123 | dout("handle_reply result %d bytes %d\n", req->r_result, | |
1124 | bytes); | |
1125 | if (req->r_result == 0) | |
1126 | req->r_result = bytes; | |
1127 | ||
1128 | /* in case this is a write and we need to replay, */ | |
1129 | req->r_reassert_version = rhead->reassert_version; | |
1130 | ||
1131 | req->r_got_reply = 1; | |
1132 | } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) { | |
1133 | dout("handle_reply tid %llu dup ack\n", tid); | |
34b43a56 | 1134 | mutex_unlock(&osdc->request_mutex); |
f24e9980 SW |
1135 | goto done; |
1136 | } | |
1137 | ||
1138 | dout("handle_reply tid %llu flags %d\n", tid, flags); | |
1139 | ||
a40c4f10 YS |
1140 | if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK)) |
1141 | __register_linger_request(osdc, req); | |
1142 | ||
f24e9980 | 1143 | /* either this is a read, or we got the safe response */ |
0ceed5db SW |
1144 | if (result < 0 || |
1145 | (flags & CEPH_OSD_FLAG_ONDISK) || | |
f24e9980 SW |
1146 | ((flags & CEPH_OSD_FLAG_WRITE) == 0)) |
1147 | __unregister_request(osdc, req); | |
1148 | ||
1149 | mutex_unlock(&osdc->request_mutex); | |
1150 | ||
1151 | if (req->r_callback) | |
1152 | req->r_callback(req, msg); | |
1153 | else | |
03066f23 | 1154 | complete_all(&req->r_completion); |
f24e9980 | 1155 | |
25845472 SW |
1156 | if (flags & CEPH_OSD_FLAG_ONDISK) |
1157 | complete_request(req); | |
f24e9980 SW |
1158 | |
1159 | done: | |
a40c4f10 | 1160 | dout("req=%p req->r_linger=%d\n", req, req->r_linger); |
f24e9980 SW |
1161 | ceph_osdc_put_request(req); |
1162 | return; | |
1163 | ||
1164 | bad: | |
1165 | pr_err("corrupt osd_op_reply got %d %d expected %d\n", | |
1166 | (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len), | |
1167 | (int)sizeof(*rhead)); | |
9ec7cab1 | 1168 | ceph_msg_dump(msg); |
f24e9980 SW |
1169 | } |
1170 | ||
6f6c7006 | 1171 | static void reset_changed_osds(struct ceph_osd_client *osdc) |
f24e9980 | 1172 | { |
f24e9980 | 1173 | struct rb_node *p, *n; |
f24e9980 | 1174 | |
6f6c7006 SW |
1175 | for (p = rb_first(&osdc->osds); p; p = n) { |
1176 | struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node); | |
f24e9980 | 1177 | |
6f6c7006 SW |
1178 | n = rb_next(p); |
1179 | if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || | |
1180 | memcmp(&osd->o_con.peer_addr, | |
1181 | ceph_osd_addr(osdc->osdmap, | |
1182 | osd->o_osd), | |
1183 | sizeof(struct ceph_entity_addr)) != 0) | |
1184 | __reset_osd(osdc, osd); | |
f24e9980 | 1185 | } |
422d2cb8 YS |
1186 | } |
1187 | ||
1188 | /* | |
6f6c7006 SW |
1189 | * Requeue requests whose mapping to an OSD has changed. If requests map to |
1190 | * no osd, request a new map. | |
422d2cb8 | 1191 | * |
e6d50f67 | 1192 | * Caller should hold map_sem for read. |
422d2cb8 | 1193 | */ |
38d6453c | 1194 | static void kick_requests(struct ceph_osd_client *osdc, int force_resend) |
422d2cb8 | 1195 | { |
a40c4f10 | 1196 | struct ceph_osd_request *req, *nreq; |
6f6c7006 SW |
1197 | struct rb_node *p; |
1198 | int needmap = 0; | |
1199 | int err; | |
422d2cb8 | 1200 | |
38d6453c | 1201 | dout("kick_requests %s\n", force_resend ? " (force resend)" : ""); |
422d2cb8 | 1202 | mutex_lock(&osdc->request_mutex); |
6194ea89 | 1203 | for (p = rb_first(&osdc->requests); p; ) { |
6f6c7006 | 1204 | req = rb_entry(p, struct ceph_osd_request, r_node); |
6194ea89 | 1205 | p = rb_next(p); |
ab60b16d AE |
1206 | |
1207 | /* | |
1208 | * For linger requests that have not yet been | |
1209 | * registered, move them to the linger list; they'll | |
1210 | * be sent to the osd in the loop below. Unregister | |
1211 | * the request before re-registering it as a linger | |
1212 | * request to ensure the __map_request() below | |
1213 | * will decide it needs to be sent. | |
1214 | */ | |
1215 | if (req->r_linger && list_empty(&req->r_linger_item)) { | |
1216 | dout("%p tid %llu restart on osd%d\n", | |
1217 | req, req->r_tid, | |
1218 | req->r_osd ? req->r_osd->o_osd : -1); | |
1219 | __unregister_request(osdc, req); | |
1220 | __register_linger_request(osdc, req); | |
1221 | continue; | |
1222 | } | |
1223 | ||
38d6453c | 1224 | err = __map_request(osdc, req, force_resend); |
6f6c7006 SW |
1225 | if (err < 0) |
1226 | continue; /* error */ | |
1227 | if (req->r_osd == NULL) { | |
1228 | dout("%p tid %llu maps to no osd\n", req, req->r_tid); | |
1229 | needmap++; /* request a newer map */ | |
1230 | } else if (err > 0) { | |
6194ea89 SW |
1231 | if (!req->r_linger) { |
1232 | dout("%p tid %llu requeued on osd%d\n", req, | |
1233 | req->r_tid, | |
1234 | req->r_osd ? req->r_osd->o_osd : -1); | |
a40c4f10 | 1235 | req->r_flags |= CEPH_OSD_FLAG_RETRY; |
6194ea89 SW |
1236 | } |
1237 | } | |
a40c4f10 YS |
1238 | } |
1239 | ||
1240 | list_for_each_entry_safe(req, nreq, &osdc->req_linger, | |
1241 | r_linger_item) { | |
1242 | dout("linger req=%p req->r_osd=%p\n", req, req->r_osd); | |
1243 | ||
38d6453c | 1244 | err = __map_request(osdc, req, force_resend); |
ab60b16d | 1245 | dout("__map_request returned %d\n", err); |
a40c4f10 YS |
1246 | if (err == 0) |
1247 | continue; /* no change and no osd was specified */ | |
1248 | if (err < 0) | |
1249 | continue; /* hrm! */ | |
1250 | if (req->r_osd == NULL) { | |
1251 | dout("tid %llu maps to no valid osd\n", req->r_tid); | |
1252 | needmap++; /* request a newer map */ | |
1253 | continue; | |
6f6c7006 | 1254 | } |
a40c4f10 YS |
1255 | |
1256 | dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid, | |
1257 | req->r_osd ? req->r_osd->o_osd : -1); | |
a40c4f10 | 1258 | __register_request(osdc, req); |
c89ce05e | 1259 | __unregister_linger_request(osdc, req); |
6f6c7006 | 1260 | } |
f24e9980 SW |
1261 | mutex_unlock(&osdc->request_mutex); |
1262 | ||
1263 | if (needmap) { | |
1264 | dout("%d requests for down osds, need new map\n", needmap); | |
1265 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1266 | } | |
e6d50f67 | 1267 | reset_changed_osds(osdc); |
422d2cb8 | 1268 | } |
6f6c7006 SW |
1269 | |
1270 | ||
f24e9980 SW |
1271 | /* |
1272 | * Process updated osd map. | |
1273 | * | |
1274 | * The message contains any number of incremental and full maps, normally | |
1275 | * indicating some sort of topology change in the cluster. Kick requests | |
1276 | * off to different OSDs as needed. | |
1277 | */ | |
1278 | void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) | |
1279 | { | |
1280 | void *p, *end, *next; | |
1281 | u32 nr_maps, maplen; | |
1282 | u32 epoch; | |
1283 | struct ceph_osdmap *newmap = NULL, *oldmap; | |
1284 | int err; | |
1285 | struct ceph_fsid fsid; | |
1286 | ||
1287 | dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0); | |
1288 | p = msg->front.iov_base; | |
1289 | end = p + msg->front.iov_len; | |
1290 | ||
1291 | /* verify fsid */ | |
1292 | ceph_decode_need(&p, end, sizeof(fsid), bad); | |
1293 | ceph_decode_copy(&p, &fsid, sizeof(fsid)); | |
0743304d SW |
1294 | if (ceph_check_fsid(osdc->client, &fsid) < 0) |
1295 | return; | |
f24e9980 SW |
1296 | |
1297 | down_write(&osdc->map_sem); | |
1298 | ||
1299 | /* incremental maps */ | |
1300 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
1301 | dout(" %d inc maps\n", nr_maps); | |
1302 | while (nr_maps > 0) { | |
1303 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
1304 | epoch = ceph_decode_32(&p); |
1305 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
1306 | ceph_decode_need(&p, end, maplen, bad); |
1307 | next = p + maplen; | |
1308 | if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) { | |
1309 | dout("applying incremental map %u len %d\n", | |
1310 | epoch, maplen); | |
1311 | newmap = osdmap_apply_incremental(&p, next, | |
1312 | osdc->osdmap, | |
15d9882c | 1313 | &osdc->client->msgr); |
f24e9980 SW |
1314 | if (IS_ERR(newmap)) { |
1315 | err = PTR_ERR(newmap); | |
1316 | goto bad; | |
1317 | } | |
30dc6381 | 1318 | BUG_ON(!newmap); |
f24e9980 SW |
1319 | if (newmap != osdc->osdmap) { |
1320 | ceph_osdmap_destroy(osdc->osdmap); | |
1321 | osdc->osdmap = newmap; | |
1322 | } | |
38d6453c | 1323 | kick_requests(osdc, 0); |
f24e9980 SW |
1324 | } else { |
1325 | dout("ignoring incremental map %u len %d\n", | |
1326 | epoch, maplen); | |
1327 | } | |
1328 | p = next; | |
1329 | nr_maps--; | |
1330 | } | |
1331 | if (newmap) | |
1332 | goto done; | |
1333 | ||
1334 | /* full maps */ | |
1335 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
1336 | dout(" %d full maps\n", nr_maps); | |
1337 | while (nr_maps) { | |
1338 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
1339 | epoch = ceph_decode_32(&p); |
1340 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
1341 | ceph_decode_need(&p, end, maplen, bad); |
1342 | if (nr_maps > 1) { | |
1343 | dout("skipping non-latest full map %u len %d\n", | |
1344 | epoch, maplen); | |
1345 | } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) { | |
1346 | dout("skipping full map %u len %d, " | |
1347 | "older than our %u\n", epoch, maplen, | |
1348 | osdc->osdmap->epoch); | |
1349 | } else { | |
38d6453c SW |
1350 | int skipped_map = 0; |
1351 | ||
f24e9980 SW |
1352 | dout("taking full map %u len %d\n", epoch, maplen); |
1353 | newmap = osdmap_decode(&p, p+maplen); | |
1354 | if (IS_ERR(newmap)) { | |
1355 | err = PTR_ERR(newmap); | |
1356 | goto bad; | |
1357 | } | |
30dc6381 | 1358 | BUG_ON(!newmap); |
f24e9980 SW |
1359 | oldmap = osdc->osdmap; |
1360 | osdc->osdmap = newmap; | |
38d6453c SW |
1361 | if (oldmap) { |
1362 | if (oldmap->epoch + 1 < newmap->epoch) | |
1363 | skipped_map = 1; | |
f24e9980 | 1364 | ceph_osdmap_destroy(oldmap); |
38d6453c SW |
1365 | } |
1366 | kick_requests(osdc, skipped_map); | |
f24e9980 SW |
1367 | } |
1368 | p += maplen; | |
1369 | nr_maps--; | |
1370 | } | |
1371 | ||
1372 | done: | |
1373 | downgrade_write(&osdc->map_sem); | |
1374 | ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch); | |
cd634fb6 SW |
1375 | |
1376 | /* | |
1377 | * subscribe to subsequent osdmap updates if full to ensure | |
1378 | * we find out when we are no longer full and stop returning | |
1379 | * ENOSPC. | |
1380 | */ | |
1381 | if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL)) | |
1382 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1383 | ||
f9d25199 AE |
1384 | mutex_lock(&osdc->request_mutex); |
1385 | __send_queued(osdc); | |
1386 | mutex_unlock(&osdc->request_mutex); | |
f24e9980 | 1387 | up_read(&osdc->map_sem); |
03066f23 | 1388 | wake_up_all(&osdc->client->auth_wq); |
f24e9980 SW |
1389 | return; |
1390 | ||
1391 | bad: | |
1392 | pr_err("osdc handle_map corrupt msg\n"); | |
9ec7cab1 | 1393 | ceph_msg_dump(msg); |
f24e9980 SW |
1394 | up_write(&osdc->map_sem); |
1395 | return; | |
1396 | } | |
1397 | ||
a40c4f10 YS |
1398 | /* |
1399 | * watch/notify callback event infrastructure | |
1400 | * | |
1401 | * These callbacks are used both for watch and notify operations. | |
1402 | */ | |
1403 | static void __release_event(struct kref *kref) | |
1404 | { | |
1405 | struct ceph_osd_event *event = | |
1406 | container_of(kref, struct ceph_osd_event, kref); | |
1407 | ||
1408 | dout("__release_event %p\n", event); | |
1409 | kfree(event); | |
1410 | } | |
1411 | ||
1412 | static void get_event(struct ceph_osd_event *event) | |
1413 | { | |
1414 | kref_get(&event->kref); | |
1415 | } | |
1416 | ||
1417 | void ceph_osdc_put_event(struct ceph_osd_event *event) | |
1418 | { | |
1419 | kref_put(&event->kref, __release_event); | |
1420 | } | |
1421 | EXPORT_SYMBOL(ceph_osdc_put_event); | |
1422 | ||
1423 | static void __insert_event(struct ceph_osd_client *osdc, | |
1424 | struct ceph_osd_event *new) | |
1425 | { | |
1426 | struct rb_node **p = &osdc->event_tree.rb_node; | |
1427 | struct rb_node *parent = NULL; | |
1428 | struct ceph_osd_event *event = NULL; | |
1429 | ||
1430 | while (*p) { | |
1431 | parent = *p; | |
1432 | event = rb_entry(parent, struct ceph_osd_event, node); | |
1433 | if (new->cookie < event->cookie) | |
1434 | p = &(*p)->rb_left; | |
1435 | else if (new->cookie > event->cookie) | |
1436 | p = &(*p)->rb_right; | |
1437 | else | |
1438 | BUG(); | |
1439 | } | |
1440 | ||
1441 | rb_link_node(&new->node, parent, p); | |
1442 | rb_insert_color(&new->node, &osdc->event_tree); | |
1443 | } | |
1444 | ||
1445 | static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc, | |
1446 | u64 cookie) | |
1447 | { | |
1448 | struct rb_node **p = &osdc->event_tree.rb_node; | |
1449 | struct rb_node *parent = NULL; | |
1450 | struct ceph_osd_event *event = NULL; | |
1451 | ||
1452 | while (*p) { | |
1453 | parent = *p; | |
1454 | event = rb_entry(parent, struct ceph_osd_event, node); | |
1455 | if (cookie < event->cookie) | |
1456 | p = &(*p)->rb_left; | |
1457 | else if (cookie > event->cookie) | |
1458 | p = &(*p)->rb_right; | |
1459 | else | |
1460 | return event; | |
1461 | } | |
1462 | return NULL; | |
1463 | } | |
1464 | ||
1465 | static void __remove_event(struct ceph_osd_event *event) | |
1466 | { | |
1467 | struct ceph_osd_client *osdc = event->osdc; | |
1468 | ||
1469 | if (!RB_EMPTY_NODE(&event->node)) { | |
1470 | dout("__remove_event removed %p\n", event); | |
1471 | rb_erase(&event->node, &osdc->event_tree); | |
1472 | ceph_osdc_put_event(event); | |
1473 | } else { | |
1474 | dout("__remove_event didn't remove %p\n", event); | |
1475 | } | |
1476 | } | |
1477 | ||
1478 | int ceph_osdc_create_event(struct ceph_osd_client *osdc, | |
1479 | void (*event_cb)(u64, u64, u8, void *), | |
3c663bbd | 1480 | void *data, struct ceph_osd_event **pevent) |
a40c4f10 YS |
1481 | { |
1482 | struct ceph_osd_event *event; | |
1483 | ||
1484 | event = kmalloc(sizeof(*event), GFP_NOIO); | |
1485 | if (!event) | |
1486 | return -ENOMEM; | |
1487 | ||
1488 | dout("create_event %p\n", event); | |
1489 | event->cb = event_cb; | |
3c663bbd | 1490 | event->one_shot = 0; |
a40c4f10 YS |
1491 | event->data = data; |
1492 | event->osdc = osdc; | |
1493 | INIT_LIST_HEAD(&event->osd_node); | |
3ee5234d | 1494 | RB_CLEAR_NODE(&event->node); |
a40c4f10 YS |
1495 | kref_init(&event->kref); /* one ref for us */ |
1496 | kref_get(&event->kref); /* one ref for the caller */ | |
a40c4f10 YS |
1497 | |
1498 | spin_lock(&osdc->event_lock); | |
1499 | event->cookie = ++osdc->event_count; | |
1500 | __insert_event(osdc, event); | |
1501 | spin_unlock(&osdc->event_lock); | |
1502 | ||
1503 | *pevent = event; | |
1504 | return 0; | |
1505 | } | |
1506 | EXPORT_SYMBOL(ceph_osdc_create_event); | |
1507 | ||
1508 | void ceph_osdc_cancel_event(struct ceph_osd_event *event) | |
1509 | { | |
1510 | struct ceph_osd_client *osdc = event->osdc; | |
1511 | ||
1512 | dout("cancel_event %p\n", event); | |
1513 | spin_lock(&osdc->event_lock); | |
1514 | __remove_event(event); | |
1515 | spin_unlock(&osdc->event_lock); | |
1516 | ceph_osdc_put_event(event); /* caller's */ | |
1517 | } | |
1518 | EXPORT_SYMBOL(ceph_osdc_cancel_event); | |
1519 | ||
1520 | ||
1521 | static void do_event_work(struct work_struct *work) | |
1522 | { | |
1523 | struct ceph_osd_event_work *event_work = | |
1524 | container_of(work, struct ceph_osd_event_work, work); | |
1525 | struct ceph_osd_event *event = event_work->event; | |
1526 | u64 ver = event_work->ver; | |
1527 | u64 notify_id = event_work->notify_id; | |
1528 | u8 opcode = event_work->opcode; | |
1529 | ||
1530 | dout("do_event_work completing %p\n", event); | |
1531 | event->cb(ver, notify_id, opcode, event->data); | |
a40c4f10 YS |
1532 | dout("do_event_work completed %p\n", event); |
1533 | ceph_osdc_put_event(event); | |
1534 | kfree(event_work); | |
1535 | } | |
1536 | ||
1537 | ||
1538 | /* | |
1539 | * Process osd watch notifications | |
1540 | */ | |
3c663bbd AE |
1541 | static void handle_watch_notify(struct ceph_osd_client *osdc, |
1542 | struct ceph_msg *msg) | |
a40c4f10 YS |
1543 | { |
1544 | void *p, *end; | |
1545 | u8 proto_ver; | |
1546 | u64 cookie, ver, notify_id; | |
1547 | u8 opcode; | |
1548 | struct ceph_osd_event *event; | |
1549 | struct ceph_osd_event_work *event_work; | |
1550 | ||
1551 | p = msg->front.iov_base; | |
1552 | end = p + msg->front.iov_len; | |
1553 | ||
1554 | ceph_decode_8_safe(&p, end, proto_ver, bad); | |
1555 | ceph_decode_8_safe(&p, end, opcode, bad); | |
1556 | ceph_decode_64_safe(&p, end, cookie, bad); | |
1557 | ceph_decode_64_safe(&p, end, ver, bad); | |
1558 | ceph_decode_64_safe(&p, end, notify_id, bad); | |
1559 | ||
1560 | spin_lock(&osdc->event_lock); | |
1561 | event = __find_event(osdc, cookie); | |
1562 | if (event) { | |
3c663bbd | 1563 | BUG_ON(event->one_shot); |
a40c4f10 | 1564 | get_event(event); |
a40c4f10 YS |
1565 | } |
1566 | spin_unlock(&osdc->event_lock); | |
1567 | dout("handle_watch_notify cookie %lld ver %lld event %p\n", | |
1568 | cookie, ver, event); | |
1569 | if (event) { | |
1570 | event_work = kmalloc(sizeof(*event_work), GFP_NOIO); | |
a40c4f10 YS |
1571 | if (!event_work) { |
1572 | dout("ERROR: could not allocate event_work\n"); | |
1573 | goto done_err; | |
1574 | } | |
6b0ae409 | 1575 | INIT_WORK(&event_work->work, do_event_work); |
a40c4f10 YS |
1576 | event_work->event = event; |
1577 | event_work->ver = ver; | |
1578 | event_work->notify_id = notify_id; | |
1579 | event_work->opcode = opcode; | |
1580 | if (!queue_work(osdc->notify_wq, &event_work->work)) { | |
1581 | dout("WARNING: failed to queue notify event work\n"); | |
1582 | goto done_err; | |
1583 | } | |
1584 | } | |
1585 | ||
1586 | return; | |
1587 | ||
1588 | done_err: | |
a40c4f10 YS |
1589 | ceph_osdc_put_event(event); |
1590 | return; | |
1591 | ||
1592 | bad: | |
1593 | pr_err("osdc handle_watch_notify corrupt msg\n"); | |
1594 | return; | |
1595 | } | |
1596 | ||
f24e9980 SW |
1597 | /* |
1598 | * Register request, send initial attempt. | |
1599 | */ | |
1600 | int ceph_osdc_start_request(struct ceph_osd_client *osdc, | |
1601 | struct ceph_osd_request *req, | |
1602 | bool nofail) | |
1603 | { | |
c1ea8823 | 1604 | int rc = 0; |
f24e9980 SW |
1605 | |
1606 | req->r_request->pages = req->r_pages; | |
1607 | req->r_request->nr_pages = req->r_num_pages; | |
68b4476b YS |
1608 | #ifdef CONFIG_BLOCK |
1609 | req->r_request->bio = req->r_bio; | |
1610 | #endif | |
c885837f | 1611 | req->r_request->trail = &req->r_trail; |
f24e9980 SW |
1612 | |
1613 | register_request(osdc, req); | |
1614 | ||
1615 | down_read(&osdc->map_sem); | |
1616 | mutex_lock(&osdc->request_mutex); | |
c1ea8823 SW |
1617 | /* |
1618 | * a racing kick_requests() may have sent the message for us | |
1619 | * while we dropped request_mutex above, so only send now if | |
1620 | * the request still han't been touched yet. | |
1621 | */ | |
1622 | if (req->r_sent == 0) { | |
38d6453c | 1623 | rc = __map_request(osdc, req, 0); |
9d6fcb08 SW |
1624 | if (rc < 0) { |
1625 | if (nofail) { | |
1626 | dout("osdc_start_request failed map, " | |
1627 | " will retry %lld\n", req->r_tid); | |
1628 | rc = 0; | |
1629 | } | |
234af26f | 1630 | goto out_unlock; |
9d6fcb08 | 1631 | } |
6f6c7006 SW |
1632 | if (req->r_osd == NULL) { |
1633 | dout("send_request %p no up osds in pg\n", req); | |
1634 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1635 | } else { | |
56e925b6 | 1636 | __send_request(osdc, req); |
f24e9980 | 1637 | } |
56e925b6 | 1638 | rc = 0; |
f24e9980 | 1639 | } |
234af26f DC |
1640 | |
1641 | out_unlock: | |
f24e9980 SW |
1642 | mutex_unlock(&osdc->request_mutex); |
1643 | up_read(&osdc->map_sem); | |
1644 | return rc; | |
1645 | } | |
3d14c5d2 | 1646 | EXPORT_SYMBOL(ceph_osdc_start_request); |
f24e9980 SW |
1647 | |
1648 | /* | |
1649 | * wait for a request to complete | |
1650 | */ | |
1651 | int ceph_osdc_wait_request(struct ceph_osd_client *osdc, | |
1652 | struct ceph_osd_request *req) | |
1653 | { | |
1654 | int rc; | |
1655 | ||
1656 | rc = wait_for_completion_interruptible(&req->r_completion); | |
1657 | if (rc < 0) { | |
1658 | mutex_lock(&osdc->request_mutex); | |
1659 | __cancel_request(req); | |
529cfcc4 | 1660 | __unregister_request(osdc, req); |
f24e9980 | 1661 | mutex_unlock(&osdc->request_mutex); |
25845472 | 1662 | complete_request(req); |
529cfcc4 | 1663 | dout("wait_request tid %llu canceled/timed out\n", req->r_tid); |
f24e9980 SW |
1664 | return rc; |
1665 | } | |
1666 | ||
1667 | dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result); | |
1668 | return req->r_result; | |
1669 | } | |
3d14c5d2 | 1670 | EXPORT_SYMBOL(ceph_osdc_wait_request); |
f24e9980 SW |
1671 | |
1672 | /* | |
1673 | * sync - wait for all in-flight requests to flush. avoid starvation. | |
1674 | */ | |
1675 | void ceph_osdc_sync(struct ceph_osd_client *osdc) | |
1676 | { | |
1677 | struct ceph_osd_request *req; | |
1678 | u64 last_tid, next_tid = 0; | |
1679 | ||
1680 | mutex_lock(&osdc->request_mutex); | |
1681 | last_tid = osdc->last_tid; | |
1682 | while (1) { | |
1683 | req = __lookup_request_ge(osdc, next_tid); | |
1684 | if (!req) | |
1685 | break; | |
1686 | if (req->r_tid > last_tid) | |
1687 | break; | |
1688 | ||
1689 | next_tid = req->r_tid + 1; | |
1690 | if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0) | |
1691 | continue; | |
1692 | ||
1693 | ceph_osdc_get_request(req); | |
1694 | mutex_unlock(&osdc->request_mutex); | |
1695 | dout("sync waiting on tid %llu (last is %llu)\n", | |
1696 | req->r_tid, last_tid); | |
1697 | wait_for_completion(&req->r_safe_completion); | |
1698 | mutex_lock(&osdc->request_mutex); | |
1699 | ceph_osdc_put_request(req); | |
1700 | } | |
1701 | mutex_unlock(&osdc->request_mutex); | |
1702 | dout("sync done (thru tid %llu)\n", last_tid); | |
1703 | } | |
3d14c5d2 | 1704 | EXPORT_SYMBOL(ceph_osdc_sync); |
f24e9980 SW |
1705 | |
1706 | /* | |
1707 | * init, shutdown | |
1708 | */ | |
1709 | int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) | |
1710 | { | |
1711 | int err; | |
1712 | ||
1713 | dout("init\n"); | |
1714 | osdc->client = client; | |
1715 | osdc->osdmap = NULL; | |
1716 | init_rwsem(&osdc->map_sem); | |
1717 | init_completion(&osdc->map_waiters); | |
1718 | osdc->last_requested_map = 0; | |
1719 | mutex_init(&osdc->request_mutex); | |
f24e9980 SW |
1720 | osdc->last_tid = 0; |
1721 | osdc->osds = RB_ROOT; | |
f5a2041b | 1722 | INIT_LIST_HEAD(&osdc->osd_lru); |
f24e9980 | 1723 | osdc->requests = RB_ROOT; |
422d2cb8 | 1724 | INIT_LIST_HEAD(&osdc->req_lru); |
6f6c7006 SW |
1725 | INIT_LIST_HEAD(&osdc->req_unsent); |
1726 | INIT_LIST_HEAD(&osdc->req_notarget); | |
a40c4f10 | 1727 | INIT_LIST_HEAD(&osdc->req_linger); |
f24e9980 SW |
1728 | osdc->num_requests = 0; |
1729 | INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); | |
f5a2041b | 1730 | INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); |
a40c4f10 YS |
1731 | spin_lock_init(&osdc->event_lock); |
1732 | osdc->event_tree = RB_ROOT; | |
1733 | osdc->event_count = 0; | |
f5a2041b YS |
1734 | |
1735 | schedule_delayed_work(&osdc->osds_timeout_work, | |
3d14c5d2 | 1736 | round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ)); |
f24e9980 | 1737 | |
5f44f142 | 1738 | err = -ENOMEM; |
f24e9980 SW |
1739 | osdc->req_mempool = mempool_create_kmalloc_pool(10, |
1740 | sizeof(struct ceph_osd_request)); | |
1741 | if (!osdc->req_mempool) | |
5f44f142 | 1742 | goto out; |
f24e9980 | 1743 | |
d50b409f SW |
1744 | err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, |
1745 | OSD_OP_FRONT_LEN, 10, true, | |
4f48280e | 1746 | "osd_op"); |
f24e9980 | 1747 | if (err < 0) |
5f44f142 | 1748 | goto out_mempool; |
d50b409f | 1749 | err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, |
4f48280e SW |
1750 | OSD_OPREPLY_FRONT_LEN, 10, true, |
1751 | "osd_op_reply"); | |
c16e7869 SW |
1752 | if (err < 0) |
1753 | goto out_msgpool; | |
a40c4f10 YS |
1754 | |
1755 | osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); | |
1756 | if (IS_ERR(osdc->notify_wq)) { | |
1757 | err = PTR_ERR(osdc->notify_wq); | |
1758 | osdc->notify_wq = NULL; | |
1759 | goto out_msgpool; | |
1760 | } | |
f24e9980 | 1761 | return 0; |
5f44f142 | 1762 | |
c16e7869 SW |
1763 | out_msgpool: |
1764 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
5f44f142 SW |
1765 | out_mempool: |
1766 | mempool_destroy(osdc->req_mempool); | |
1767 | out: | |
1768 | return err; | |
f24e9980 SW |
1769 | } |
1770 | ||
1771 | void ceph_osdc_stop(struct ceph_osd_client *osdc) | |
1772 | { | |
a40c4f10 YS |
1773 | flush_workqueue(osdc->notify_wq); |
1774 | destroy_workqueue(osdc->notify_wq); | |
f24e9980 | 1775 | cancel_delayed_work_sync(&osdc->timeout_work); |
f5a2041b | 1776 | cancel_delayed_work_sync(&osdc->osds_timeout_work); |
f24e9980 SW |
1777 | if (osdc->osdmap) { |
1778 | ceph_osdmap_destroy(osdc->osdmap); | |
1779 | osdc->osdmap = NULL; | |
1780 | } | |
aca420bc | 1781 | remove_all_osds(osdc); |
f24e9980 SW |
1782 | mempool_destroy(osdc->req_mempool); |
1783 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
c16e7869 | 1784 | ceph_msgpool_destroy(&osdc->msgpool_op_reply); |
f24e9980 SW |
1785 | } |
1786 | ||
1787 | /* | |
1788 | * Read some contiguous pages. If we cross a stripe boundary, shorten | |
1789 | * *plen. Return number of bytes read, or error. | |
1790 | */ | |
1791 | int ceph_osdc_readpages(struct ceph_osd_client *osdc, | |
1792 | struct ceph_vino vino, struct ceph_file_layout *layout, | |
1793 | u64 off, u64 *plen, | |
1794 | u32 truncate_seq, u64 truncate_size, | |
b7495fc2 | 1795 | struct page **pages, int num_pages, int page_align) |
f24e9980 SW |
1796 | { |
1797 | struct ceph_osd_request *req; | |
1798 | int rc = 0; | |
1799 | ||
1800 | dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, | |
1801 | vino.snap, off, *plen); | |
1802 | req = ceph_osdc_new_request(osdc, layout, vino, off, plen, | |
1803 | CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, | |
1804 | NULL, 0, truncate_seq, truncate_size, NULL, | |
a3bea47e | 1805 | false, page_align); |
6816282d SW |
1806 | if (IS_ERR(req)) |
1807 | return PTR_ERR(req); | |
f24e9980 SW |
1808 | |
1809 | /* it may be a short read due to an object boundary */ | |
1810 | req->r_pages = pages; | |
f24e9980 | 1811 | |
b7495fc2 SW |
1812 | dout("readpages final extent is %llu~%llu (%d pages align %d)\n", |
1813 | off, *plen, req->r_num_pages, page_align); | |
f24e9980 SW |
1814 | |
1815 | rc = ceph_osdc_start_request(osdc, req, false); | |
1816 | if (!rc) | |
1817 | rc = ceph_osdc_wait_request(osdc, req); | |
1818 | ||
1819 | ceph_osdc_put_request(req); | |
1820 | dout("readpages result %d\n", rc); | |
1821 | return rc; | |
1822 | } | |
3d14c5d2 | 1823 | EXPORT_SYMBOL(ceph_osdc_readpages); |
f24e9980 SW |
1824 | |
1825 | /* | |
1826 | * do a synchronous write on N pages | |
1827 | */ | |
1828 | int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, | |
1829 | struct ceph_file_layout *layout, | |
1830 | struct ceph_snap_context *snapc, | |
1831 | u64 off, u64 len, | |
1832 | u32 truncate_seq, u64 truncate_size, | |
1833 | struct timespec *mtime, | |
24808826 | 1834 | struct page **pages, int num_pages) |
f24e9980 SW |
1835 | { |
1836 | struct ceph_osd_request *req; | |
1837 | int rc = 0; | |
b7495fc2 | 1838 | int page_align = off & ~PAGE_MASK; |
f24e9980 SW |
1839 | |
1840 | BUG_ON(vino.snap != CEPH_NOSNAP); | |
1841 | req = ceph_osdc_new_request(osdc, layout, vino, off, &len, | |
1842 | CEPH_OSD_OP_WRITE, | |
24808826 | 1843 | CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE, |
fbf8685f | 1844 | snapc, 0, |
f24e9980 | 1845 | truncate_seq, truncate_size, mtime, |
a3bea47e | 1846 | true, page_align); |
6816282d SW |
1847 | if (IS_ERR(req)) |
1848 | return PTR_ERR(req); | |
f24e9980 SW |
1849 | |
1850 | /* it may be a short write due to an object boundary */ | |
1851 | req->r_pages = pages; | |
f24e9980 SW |
1852 | dout("writepages %llu~%llu (%d pages)\n", off, len, |
1853 | req->r_num_pages); | |
1854 | ||
87f979d3 | 1855 | rc = ceph_osdc_start_request(osdc, req, true); |
f24e9980 SW |
1856 | if (!rc) |
1857 | rc = ceph_osdc_wait_request(osdc, req); | |
1858 | ||
1859 | ceph_osdc_put_request(req); | |
1860 | if (rc == 0) | |
1861 | rc = len; | |
1862 | dout("writepages result %d\n", rc); | |
1863 | return rc; | |
1864 | } | |
3d14c5d2 | 1865 | EXPORT_SYMBOL(ceph_osdc_writepages); |
f24e9980 SW |
1866 | |
1867 | /* | |
1868 | * handle incoming message | |
1869 | */ | |
1870 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
1871 | { | |
1872 | struct ceph_osd *osd = con->private; | |
32c895e7 | 1873 | struct ceph_osd_client *osdc; |
f24e9980 SW |
1874 | int type = le16_to_cpu(msg->hdr.type); |
1875 | ||
1876 | if (!osd) | |
4a32f93d | 1877 | goto out; |
32c895e7 | 1878 | osdc = osd->o_osdc; |
f24e9980 SW |
1879 | |
1880 | switch (type) { | |
1881 | case CEPH_MSG_OSD_MAP: | |
1882 | ceph_osdc_handle_map(osdc, msg); | |
1883 | break; | |
1884 | case CEPH_MSG_OSD_OPREPLY: | |
350b1c32 | 1885 | handle_reply(osdc, msg, con); |
f24e9980 | 1886 | break; |
a40c4f10 YS |
1887 | case CEPH_MSG_WATCH_NOTIFY: |
1888 | handle_watch_notify(osdc, msg); | |
1889 | break; | |
f24e9980 SW |
1890 | |
1891 | default: | |
1892 | pr_err("received unknown message type %d %s\n", type, | |
1893 | ceph_msg_type_name(type)); | |
1894 | } | |
4a32f93d | 1895 | out: |
f24e9980 SW |
1896 | ceph_msg_put(msg); |
1897 | } | |
1898 | ||
5b3a4db3 | 1899 | /* |
21b667f6 SW |
1900 | * lookup and return message for incoming reply. set up reply message |
1901 | * pages. | |
5b3a4db3 SW |
1902 | */ |
1903 | static struct ceph_msg *get_reply(struct ceph_connection *con, | |
2450418c YS |
1904 | struct ceph_msg_header *hdr, |
1905 | int *skip) | |
f24e9980 SW |
1906 | { |
1907 | struct ceph_osd *osd = con->private; | |
1908 | struct ceph_osd_client *osdc = osd->o_osdc; | |
2450418c | 1909 | struct ceph_msg *m; |
0547a9b3 | 1910 | struct ceph_osd_request *req; |
5b3a4db3 SW |
1911 | int front = le32_to_cpu(hdr->front_len); |
1912 | int data_len = le32_to_cpu(hdr->data_len); | |
0547a9b3 | 1913 | u64 tid; |
f24e9980 | 1914 | |
0547a9b3 YS |
1915 | tid = le64_to_cpu(hdr->tid); |
1916 | mutex_lock(&osdc->request_mutex); | |
1917 | req = __lookup_request(osdc, tid); | |
1918 | if (!req) { | |
1919 | *skip = 1; | |
1920 | m = NULL; | |
756a16a5 SW |
1921 | dout("get_reply unknown tid %llu from osd%d\n", tid, |
1922 | osd->o_osd); | |
0547a9b3 YS |
1923 | goto out; |
1924 | } | |
c16e7869 SW |
1925 | |
1926 | if (req->r_con_filling_msg) { | |
8921d114 | 1927 | dout("%s revoking msg %p from old con %p\n", __func__, |
c16e7869 | 1928 | req->r_reply, req->r_con_filling_msg); |
8921d114 | 1929 | ceph_msg_revoke_incoming(req->r_reply); |
0d47766f | 1930 | req->r_con_filling_msg->ops->put(req->r_con_filling_msg); |
6f46cb29 | 1931 | req->r_con_filling_msg = NULL; |
0547a9b3 YS |
1932 | } |
1933 | ||
c16e7869 SW |
1934 | if (front > req->r_reply->front.iov_len) { |
1935 | pr_warning("get_reply front %d > preallocated %d\n", | |
1936 | front, (int)req->r_reply->front.iov_len); | |
b61c2763 | 1937 | m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS, false); |
a79832f2 | 1938 | if (!m) |
c16e7869 SW |
1939 | goto out; |
1940 | ceph_msg_put(req->r_reply); | |
1941 | req->r_reply = m; | |
1942 | } | |
1943 | m = ceph_msg_get(req->r_reply); | |
1944 | ||
0547a9b3 | 1945 | if (data_len > 0) { |
b7495fc2 | 1946 | int want = calc_pages_for(req->r_page_alignment, data_len); |
21b667f6 | 1947 | |
9cbb1d72 | 1948 | if (req->r_pages && unlikely(req->r_num_pages < want)) { |
9bb0ce2b SW |
1949 | pr_warning("tid %lld reply has %d bytes %d pages, we" |
1950 | " had only %d pages ready\n", tid, data_len, | |
1951 | want, req->r_num_pages); | |
0547a9b3 YS |
1952 | *skip = 1; |
1953 | ceph_msg_put(m); | |
a79832f2 | 1954 | m = NULL; |
21b667f6 | 1955 | goto out; |
0547a9b3 | 1956 | } |
21b667f6 SW |
1957 | m->pages = req->r_pages; |
1958 | m->nr_pages = req->r_num_pages; | |
c5c6b19d | 1959 | m->page_alignment = req->r_page_alignment; |
68b4476b YS |
1960 | #ifdef CONFIG_BLOCK |
1961 | m->bio = req->r_bio; | |
1962 | #endif | |
0547a9b3 | 1963 | } |
5b3a4db3 | 1964 | *skip = 0; |
0d47766f | 1965 | req->r_con_filling_msg = con->ops->get(con); |
c16e7869 | 1966 | dout("get_reply tid %lld %p\n", tid, m); |
0547a9b3 YS |
1967 | |
1968 | out: | |
1969 | mutex_unlock(&osdc->request_mutex); | |
2450418c | 1970 | return m; |
5b3a4db3 SW |
1971 | |
1972 | } | |
1973 | ||
1974 | static struct ceph_msg *alloc_msg(struct ceph_connection *con, | |
1975 | struct ceph_msg_header *hdr, | |
1976 | int *skip) | |
1977 | { | |
1978 | struct ceph_osd *osd = con->private; | |
1979 | int type = le16_to_cpu(hdr->type); | |
1980 | int front = le32_to_cpu(hdr->front_len); | |
1981 | ||
1c20f2d2 | 1982 | *skip = 0; |
5b3a4db3 SW |
1983 | switch (type) { |
1984 | case CEPH_MSG_OSD_MAP: | |
a40c4f10 | 1985 | case CEPH_MSG_WATCH_NOTIFY: |
b61c2763 | 1986 | return ceph_msg_new(type, front, GFP_NOFS, false); |
5b3a4db3 SW |
1987 | case CEPH_MSG_OSD_OPREPLY: |
1988 | return get_reply(con, hdr, skip); | |
1989 | default: | |
1990 | pr_info("alloc_msg unexpected msg type %d from osd%d\n", type, | |
1991 | osd->o_osd); | |
1992 | *skip = 1; | |
1993 | return NULL; | |
1994 | } | |
f24e9980 SW |
1995 | } |
1996 | ||
1997 | /* | |
1998 | * Wrappers to refcount containing ceph_osd struct | |
1999 | */ | |
2000 | static struct ceph_connection *get_osd_con(struct ceph_connection *con) | |
2001 | { | |
2002 | struct ceph_osd *osd = con->private; | |
2003 | if (get_osd(osd)) | |
2004 | return con; | |
2005 | return NULL; | |
2006 | } | |
2007 | ||
2008 | static void put_osd_con(struct ceph_connection *con) | |
2009 | { | |
2010 | struct ceph_osd *osd = con->private; | |
2011 | put_osd(osd); | |
2012 | } | |
2013 | ||
4e7a5dcd SW |
2014 | /* |
2015 | * authentication | |
2016 | */ | |
a3530df3 AE |
2017 | /* |
2018 | * Note: returned pointer is the address of a structure that's | |
2019 | * managed separately. Caller must *not* attempt to free it. | |
2020 | */ | |
2021 | static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, | |
8f43fb53 | 2022 | int *proto, int force_new) |
4e7a5dcd SW |
2023 | { |
2024 | struct ceph_osd *o = con->private; | |
2025 | struct ceph_osd_client *osdc = o->o_osdc; | |
2026 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
74f1869f | 2027 | struct ceph_auth_handshake *auth = &o->o_auth; |
4e7a5dcd | 2028 | |
74f1869f | 2029 | if (force_new && auth->authorizer) { |
a255651d AE |
2030 | if (ac->ops && ac->ops->destroy_authorizer) |
2031 | ac->ops->destroy_authorizer(ac, auth->authorizer); | |
74f1869f AE |
2032 | auth->authorizer = NULL; |
2033 | } | |
a255651d | 2034 | if (!auth->authorizer && ac->ops && ac->ops->create_authorizer) { |
a3530df3 AE |
2035 | int ret = ac->ops->create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, |
2036 | auth); | |
4e7a5dcd | 2037 | if (ret) |
a3530df3 | 2038 | return ERR_PTR(ret); |
4e7a5dcd | 2039 | } |
4e7a5dcd | 2040 | *proto = ac->protocol; |
74f1869f | 2041 | |
a3530df3 | 2042 | return auth; |
4e7a5dcd SW |
2043 | } |
2044 | ||
2045 | ||
2046 | static int verify_authorizer_reply(struct ceph_connection *con, int len) | |
2047 | { | |
2048 | struct ceph_osd *o = con->private; | |
2049 | struct ceph_osd_client *osdc = o->o_osdc; | |
2050 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
2051 | ||
a255651d AE |
2052 | /* |
2053 | * XXX If ac->ops or ac->ops->verify_authorizer_reply is null, | |
2054 | * XXX which do we do: succeed or fail? | |
2055 | */ | |
6c4a1915 | 2056 | return ac->ops->verify_authorizer_reply(ac, o->o_auth.authorizer, len); |
4e7a5dcd SW |
2057 | } |
2058 | ||
9bd2e6f8 SW |
2059 | static int invalidate_authorizer(struct ceph_connection *con) |
2060 | { | |
2061 | struct ceph_osd *o = con->private; | |
2062 | struct ceph_osd_client *osdc = o->o_osdc; | |
2063 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
2064 | ||
a255651d | 2065 | if (ac->ops && ac->ops->invalidate_authorizer) |
9bd2e6f8 SW |
2066 | ac->ops->invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); |
2067 | ||
2068 | return ceph_monc_validate_auth(&osdc->client->monc); | |
2069 | } | |
4e7a5dcd | 2070 | |
9e32789f | 2071 | static const struct ceph_connection_operations osd_con_ops = { |
f24e9980 SW |
2072 | .get = get_osd_con, |
2073 | .put = put_osd_con, | |
2074 | .dispatch = dispatch, | |
4e7a5dcd SW |
2075 | .get_authorizer = get_authorizer, |
2076 | .verify_authorizer_reply = verify_authorizer_reply, | |
9bd2e6f8 | 2077 | .invalidate_authorizer = invalidate_authorizer, |
f24e9980 | 2078 | .alloc_msg = alloc_msg, |
81b024e7 | 2079 | .fault = osd_reset, |
f24e9980 | 2080 | }; |