Commit | Line | Data |
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3d14c5d2 | 1 | #include <linux/ceph/ceph_debug.h> |
f24e9980 | 2 | |
3d14c5d2 | 3 | #include <linux/module.h> |
f24e9980 SW |
4 | #include <linux/err.h> |
5 | #include <linux/highmem.h> | |
6 | #include <linux/mm.h> | |
7 | #include <linux/pagemap.h> | |
8 | #include <linux/slab.h> | |
9 | #include <linux/uaccess.h> | |
68b4476b YS |
10 | #ifdef CONFIG_BLOCK |
11 | #include <linux/bio.h> | |
12 | #endif | |
f24e9980 | 13 | |
3d14c5d2 YS |
14 | #include <linux/ceph/libceph.h> |
15 | #include <linux/ceph/osd_client.h> | |
16 | #include <linux/ceph/messenger.h> | |
17 | #include <linux/ceph/decode.h> | |
18 | #include <linux/ceph/auth.h> | |
19 | #include <linux/ceph/pagelist.h> | |
f24e9980 | 20 | |
c16e7869 SW |
21 | #define OSD_OP_FRONT_LEN 4096 |
22 | #define OSD_OPREPLY_FRONT_LEN 512 | |
0d59ab81 | 23 | |
9e32789f | 24 | static const struct ceph_connection_operations osd_con_ops; |
f24e9980 | 25 | |
6f6c7006 SW |
26 | static void send_queued(struct ceph_osd_client *osdc); |
27 | static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd); | |
a40c4f10 YS |
28 | static void __register_request(struct ceph_osd_client *osdc, |
29 | struct ceph_osd_request *req); | |
30 | static void __unregister_linger_request(struct ceph_osd_client *osdc, | |
31 | struct ceph_osd_request *req); | |
56e925b6 SW |
32 | static void __send_request(struct ceph_osd_client *osdc, |
33 | struct ceph_osd_request *req); | |
f24e9980 | 34 | |
68b4476b YS |
35 | static int op_has_extent(int op) |
36 | { | |
37 | return (op == CEPH_OSD_OP_READ || | |
38 | op == CEPH_OSD_OP_WRITE); | |
39 | } | |
40 | ||
d63b77f4 | 41 | int ceph_calc_raw_layout(struct ceph_osd_client *osdc, |
3499e8a5 YS |
42 | struct ceph_file_layout *layout, |
43 | u64 snapid, | |
68b4476b YS |
44 | u64 off, u64 *plen, u64 *bno, |
45 | struct ceph_osd_request *req, | |
46 | struct ceph_osd_req_op *op) | |
3499e8a5 YS |
47 | { |
48 | struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base; | |
68b4476b | 49 | u64 orig_len = *plen; |
3499e8a5 | 50 | u64 objoff, objlen; /* extent in object */ |
d63b77f4 | 51 | int r; |
3499e8a5 YS |
52 | |
53 | reqhead->snapid = cpu_to_le64(snapid); | |
54 | ||
55 | /* object extent? */ | |
d63b77f4 SW |
56 | r = ceph_calc_file_object_mapping(layout, off, plen, bno, |
57 | &objoff, &objlen); | |
58 | if (r < 0) | |
59 | return r; | |
68b4476b | 60 | if (*plen < orig_len) |
3499e8a5 | 61 | dout(" skipping last %llu, final file extent %llu~%llu\n", |
68b4476b | 62 | orig_len - *plen, off, *plen); |
3499e8a5 | 63 | |
68b4476b | 64 | if (op_has_extent(op->op)) { |
a41bad1a | 65 | u32 osize = le32_to_cpu(layout->fl_object_size); |
68b4476b YS |
66 | op->extent.offset = objoff; |
67 | op->extent.length = objlen; | |
a41bad1a YZ |
68 | if (op->extent.truncate_size <= off - objoff) { |
69 | op->extent.truncate_size = 0; | |
70 | } else { | |
71 | op->extent.truncate_size -= off - objoff; | |
72 | if (op->extent.truncate_size > osize) | |
73 | op->extent.truncate_size = osize; | |
74 | } | |
68b4476b YS |
75 | } |
76 | req->r_num_pages = calc_pages_for(off, *plen); | |
b7495fc2 | 77 | req->r_page_alignment = off & ~PAGE_MASK; |
3d14c5d2 YS |
78 | if (op->op == CEPH_OSD_OP_WRITE) |
79 | op->payload_len = *plen; | |
3499e8a5 YS |
80 | |
81 | dout("calc_layout bno=%llx %llu~%llu (%d pages)\n", | |
82 | *bno, objoff, objlen, req->r_num_pages); | |
d63b77f4 | 83 | return 0; |
3499e8a5 | 84 | } |
3d14c5d2 | 85 | EXPORT_SYMBOL(ceph_calc_raw_layout); |
3499e8a5 | 86 | |
f24e9980 SW |
87 | /* |
88 | * Implement client access to distributed object storage cluster. | |
89 | * | |
90 | * All data objects are stored within a cluster/cloud of OSDs, or | |
91 | * "object storage devices." (Note that Ceph OSDs have _nothing_ to | |
92 | * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply | |
93 | * remote daemons serving up and coordinating consistent and safe | |
94 | * access to storage. | |
95 | * | |
96 | * Cluster membership and the mapping of data objects onto storage devices | |
97 | * are described by the osd map. | |
98 | * | |
99 | * We keep track of pending OSD requests (read, write), resubmit | |
100 | * requests to different OSDs when the cluster topology/data layout | |
101 | * change, or retry the affected requests when the communications | |
102 | * channel with an OSD is reset. | |
103 | */ | |
104 | ||
105 | /* | |
106 | * calculate the mapping of a file extent onto an object, and fill out the | |
107 | * request accordingly. shorten extent as necessary if it crosses an | |
108 | * object boundary. | |
109 | * | |
110 | * fill osd op in request message. | |
111 | */ | |
d63b77f4 SW |
112 | static int calc_layout(struct ceph_osd_client *osdc, |
113 | struct ceph_vino vino, | |
114 | struct ceph_file_layout *layout, | |
115 | u64 off, u64 *plen, | |
116 | struct ceph_osd_request *req, | |
117 | struct ceph_osd_req_op *op) | |
f24e9980 | 118 | { |
f24e9980 | 119 | u64 bno; |
d63b77f4 | 120 | int r; |
f24e9980 | 121 | |
d63b77f4 SW |
122 | r = ceph_calc_raw_layout(osdc, layout, vino.snap, off, |
123 | plen, &bno, req, op); | |
124 | if (r < 0) | |
125 | return r; | |
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); |
d63b77f4 SW |
129 | |
130 | return r; | |
f24e9980 SW |
131 | } |
132 | ||
f24e9980 SW |
133 | /* |
134 | * requests | |
135 | */ | |
415e49a9 | 136 | void ceph_osdc_release_request(struct kref *kref) |
f24e9980 | 137 | { |
415e49a9 SW |
138 | struct ceph_osd_request *req = container_of(kref, |
139 | struct ceph_osd_request, | |
140 | r_kref); | |
141 | ||
142 | if (req->r_request) | |
143 | ceph_msg_put(req->r_request); | |
0d59ab81 | 144 | if (req->r_con_filling_msg) { |
8921d114 | 145 | dout("%s revoking pages %p from con %p\n", __func__, |
0d59ab81 | 146 | req->r_pages, req->r_con_filling_msg); |
8921d114 | 147 | ceph_msg_revoke_incoming(req->r_reply); |
0d47766f | 148 | req->r_con_filling_msg->ops->put(req->r_con_filling_msg); |
350b1c32 | 149 | } |
ab8cb34a AE |
150 | if (req->r_reply) |
151 | ceph_msg_put(req->r_reply); | |
415e49a9 SW |
152 | if (req->r_own_pages) |
153 | ceph_release_page_vector(req->r_pages, | |
154 | req->r_num_pages); | |
68b4476b YS |
155 | #ifdef CONFIG_BLOCK |
156 | if (req->r_bio) | |
157 | bio_put(req->r_bio); | |
158 | #endif | |
415e49a9 | 159 | ceph_put_snap_context(req->r_snapc); |
c885837f | 160 | ceph_pagelist_release(&req->r_trail); |
415e49a9 SW |
161 | if (req->r_mempool) |
162 | mempool_free(req, req->r_osdc->req_mempool); | |
163 | else | |
164 | kfree(req); | |
f24e9980 | 165 | } |
3d14c5d2 | 166 | EXPORT_SYMBOL(ceph_osdc_release_request); |
68b4476b | 167 | |
5b9d1b1c | 168 | static int get_num_ops(struct ceph_osd_req_op *ops) |
68b4476b YS |
169 | { |
170 | int i = 0; | |
171 | ||
5b9d1b1c | 172 | while (ops[i].op) |
68b4476b | 173 | i++; |
68b4476b YS |
174 | |
175 | return i; | |
176 | } | |
177 | ||
3499e8a5 YS |
178 | struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, |
179 | int flags, | |
f24e9980 | 180 | struct ceph_snap_context *snapc, |
68b4476b | 181 | struct ceph_osd_req_op *ops, |
3499e8a5 YS |
182 | bool use_mempool, |
183 | gfp_t gfp_flags, | |
68b4476b YS |
184 | struct page **pages, |
185 | struct bio *bio) | |
f24e9980 SW |
186 | { |
187 | struct ceph_osd_request *req; | |
188 | struct ceph_msg *msg; | |
5b9d1b1c | 189 | int num_op = get_num_ops(ops); |
68b4476b | 190 | size_t msg_size = sizeof(struct ceph_osd_request_head); |
3499e8a5 | 191 | |
68b4476b | 192 | msg_size += num_op*sizeof(struct ceph_osd_op); |
f24e9980 SW |
193 | |
194 | if (use_mempool) { | |
3499e8a5 | 195 | req = mempool_alloc(osdc->req_mempool, gfp_flags); |
f24e9980 SW |
196 | memset(req, 0, sizeof(*req)); |
197 | } else { | |
3499e8a5 | 198 | req = kzalloc(sizeof(*req), gfp_flags); |
f24e9980 SW |
199 | } |
200 | if (req == NULL) | |
a79832f2 | 201 | return NULL; |
f24e9980 | 202 | |
f24e9980 SW |
203 | req->r_osdc = osdc; |
204 | req->r_mempool = use_mempool; | |
68b4476b | 205 | |
415e49a9 | 206 | kref_init(&req->r_kref); |
f24e9980 SW |
207 | init_completion(&req->r_completion); |
208 | init_completion(&req->r_safe_completion); | |
a978fa20 | 209 | RB_CLEAR_NODE(&req->r_node); |
f24e9980 | 210 | INIT_LIST_HEAD(&req->r_unsafe_item); |
a40c4f10 YS |
211 | INIT_LIST_HEAD(&req->r_linger_item); |
212 | INIT_LIST_HEAD(&req->r_linger_osd); | |
935b639a | 213 | INIT_LIST_HEAD(&req->r_req_lru_item); |
cd43045c SW |
214 | INIT_LIST_HEAD(&req->r_osd_item); |
215 | ||
f24e9980 SW |
216 | req->r_flags = flags; |
217 | ||
218 | WARN_ON((flags & (CEPH_OSD_FLAG_READ|CEPH_OSD_FLAG_WRITE)) == 0); | |
219 | ||
c16e7869 SW |
220 | /* create reply message */ |
221 | if (use_mempool) | |
222 | msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); | |
223 | else | |
224 | msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, | |
b61c2763 | 225 | OSD_OPREPLY_FRONT_LEN, gfp_flags, true); |
a79832f2 | 226 | if (!msg) { |
c16e7869 | 227 | ceph_osdc_put_request(req); |
a79832f2 | 228 | return NULL; |
c16e7869 SW |
229 | } |
230 | req->r_reply = msg; | |
231 | ||
c885837f | 232 | ceph_pagelist_init(&req->r_trail); |
d50b409f | 233 | |
c16e7869 | 234 | /* create request message; allow space for oid */ |
224736d9 | 235 | msg_size += MAX_OBJ_NAME_SIZE; |
f24e9980 SW |
236 | if (snapc) |
237 | msg_size += sizeof(u64) * snapc->num_snaps; | |
238 | if (use_mempool) | |
8f3bc053 | 239 | msg = ceph_msgpool_get(&osdc->msgpool_op, 0); |
f24e9980 | 240 | else |
b61c2763 | 241 | msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true); |
a79832f2 | 242 | if (!msg) { |
f24e9980 | 243 | ceph_osdc_put_request(req); |
a79832f2 | 244 | return NULL; |
f24e9980 | 245 | } |
68b4476b | 246 | |
f24e9980 | 247 | memset(msg->front.iov_base, 0, msg->front.iov_len); |
3499e8a5 YS |
248 | |
249 | req->r_request = msg; | |
250 | req->r_pages = pages; | |
68b4476b YS |
251 | #ifdef CONFIG_BLOCK |
252 | if (bio) { | |
253 | req->r_bio = bio; | |
254 | bio_get(req->r_bio); | |
255 | } | |
256 | #endif | |
3499e8a5 YS |
257 | |
258 | return req; | |
259 | } | |
3d14c5d2 | 260 | EXPORT_SYMBOL(ceph_osdc_alloc_request); |
3499e8a5 | 261 | |
68b4476b YS |
262 | static void osd_req_encode_op(struct ceph_osd_request *req, |
263 | struct ceph_osd_op *dst, | |
264 | struct ceph_osd_req_op *src) | |
265 | { | |
266 | dst->op = cpu_to_le16(src->op); | |
267 | ||
065a68f9 | 268 | switch (src->op) { |
68b4476b YS |
269 | case CEPH_OSD_OP_READ: |
270 | case CEPH_OSD_OP_WRITE: | |
271 | dst->extent.offset = | |
272 | cpu_to_le64(src->extent.offset); | |
273 | dst->extent.length = | |
274 | cpu_to_le64(src->extent.length); | |
275 | dst->extent.truncate_size = | |
276 | cpu_to_le64(src->extent.truncate_size); | |
277 | dst->extent.truncate_seq = | |
278 | cpu_to_le32(src->extent.truncate_seq); | |
279 | break; | |
280 | ||
281 | case CEPH_OSD_OP_GETXATTR: | |
282 | case CEPH_OSD_OP_SETXATTR: | |
283 | case CEPH_OSD_OP_CMPXATTR: | |
68b4476b YS |
284 | dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); |
285 | dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); | |
286 | dst->xattr.cmp_op = src->xattr.cmp_op; | |
287 | dst->xattr.cmp_mode = src->xattr.cmp_mode; | |
c885837f | 288 | ceph_pagelist_append(&req->r_trail, src->xattr.name, |
68b4476b | 289 | src->xattr.name_len); |
c885837f | 290 | ceph_pagelist_append(&req->r_trail, src->xattr.val, |
68b4476b YS |
291 | src->xattr.value_len); |
292 | break; | |
ae1533b6 | 293 | case CEPH_OSD_OP_CALL: |
ae1533b6 YS |
294 | dst->cls.class_len = src->cls.class_len; |
295 | dst->cls.method_len = src->cls.method_len; | |
296 | dst->cls.indata_len = cpu_to_le32(src->cls.indata_len); | |
297 | ||
c885837f | 298 | ceph_pagelist_append(&req->r_trail, src->cls.class_name, |
ae1533b6 | 299 | src->cls.class_len); |
c885837f | 300 | ceph_pagelist_append(&req->r_trail, src->cls.method_name, |
ae1533b6 | 301 | src->cls.method_len); |
c885837f | 302 | ceph_pagelist_append(&req->r_trail, src->cls.indata, |
ae1533b6 YS |
303 | src->cls.indata_len); |
304 | break; | |
305 | case CEPH_OSD_OP_ROLLBACK: | |
306 | dst->snap.snapid = cpu_to_le64(src->snap.snapid); | |
307 | break; | |
68b4476b YS |
308 | case CEPH_OSD_OP_STARTSYNC: |
309 | break; | |
a40c4f10 YS |
310 | case CEPH_OSD_OP_NOTIFY: |
311 | { | |
312 | __le32 prot_ver = cpu_to_le32(src->watch.prot_ver); | |
313 | __le32 timeout = cpu_to_le32(src->watch.timeout); | |
314 | ||
c885837f | 315 | ceph_pagelist_append(&req->r_trail, |
a40c4f10 | 316 | &prot_ver, sizeof(prot_ver)); |
c885837f | 317 | ceph_pagelist_append(&req->r_trail, |
a40c4f10 YS |
318 | &timeout, sizeof(timeout)); |
319 | } | |
320 | case CEPH_OSD_OP_NOTIFY_ACK: | |
321 | case CEPH_OSD_OP_WATCH: | |
322 | dst->watch.cookie = cpu_to_le64(src->watch.cookie); | |
323 | dst->watch.ver = cpu_to_le64(src->watch.ver); | |
324 | dst->watch.flag = src->watch.flag; | |
325 | break; | |
68b4476b YS |
326 | default: |
327 | pr_err("unrecognized osd opcode %d\n", dst->op); | |
328 | WARN_ON(1); | |
329 | break; | |
330 | } | |
331 | dst->payload_len = cpu_to_le32(src->payload_len); | |
332 | } | |
333 | ||
3499e8a5 YS |
334 | /* |
335 | * build new request AND message | |
336 | * | |
337 | */ | |
338 | void ceph_osdc_build_request(struct ceph_osd_request *req, | |
68b4476b YS |
339 | u64 off, u64 *plen, |
340 | struct ceph_osd_req_op *src_ops, | |
341 | struct ceph_snap_context *snapc, | |
af77f26c | 342 | struct timespec *mtime) |
3499e8a5 YS |
343 | { |
344 | struct ceph_msg *msg = req->r_request; | |
345 | struct ceph_osd_request_head *head; | |
68b4476b | 346 | struct ceph_osd_req_op *src_op; |
3499e8a5 YS |
347 | struct ceph_osd_op *op; |
348 | void *p; | |
5b9d1b1c | 349 | int num_op = get_num_ops(src_ops); |
3499e8a5 | 350 | size_t msg_size = sizeof(*head) + num_op*sizeof(*op); |
3499e8a5 | 351 | int flags = req->r_flags; |
68b4476b YS |
352 | u64 data_len = 0; |
353 | int i; | |
3499e8a5 | 354 | |
f24e9980 SW |
355 | head = msg->front.iov_base; |
356 | op = (void *)(head + 1); | |
357 | p = (void *)(op + num_op); | |
358 | ||
f24e9980 SW |
359 | req->r_snapc = ceph_get_snap_context(snapc); |
360 | ||
361 | head->client_inc = cpu_to_le32(1); /* always, for now. */ | |
362 | head->flags = cpu_to_le32(flags); | |
363 | if (flags & CEPH_OSD_FLAG_WRITE) | |
364 | ceph_encode_timespec(&head->mtime, mtime); | |
365 | head->num_ops = cpu_to_le16(num_op); | |
f24e9980 | 366 | |
f24e9980 SW |
367 | |
368 | /* fill in oid */ | |
af77f26c AE |
369 | head->object_len = cpu_to_le32(req->r_oid_len); |
370 | memcpy(p, req->r_oid, req->r_oid_len); | |
371 | p += req->r_oid_len; | |
f24e9980 | 372 | |
68b4476b YS |
373 | src_op = src_ops; |
374 | while (src_op->op) { | |
375 | osd_req_encode_op(req, op, src_op); | |
376 | src_op++; | |
f24e9980 | 377 | op++; |
f24e9980 | 378 | } |
68b4476b | 379 | |
c885837f | 380 | data_len += req->r_trail.length; |
68b4476b | 381 | |
f24e9980 SW |
382 | if (snapc) { |
383 | head->snap_seq = cpu_to_le64(snapc->seq); | |
384 | head->num_snaps = cpu_to_le32(snapc->num_snaps); | |
385 | for (i = 0; i < snapc->num_snaps; i++) { | |
386 | put_unaligned_le64(snapc->snaps[i], p); | |
387 | p += sizeof(u64); | |
388 | } | |
389 | } | |
390 | ||
68b4476b YS |
391 | if (flags & CEPH_OSD_FLAG_WRITE) { |
392 | req->r_request->hdr.data_off = cpu_to_le16(off); | |
393 | req->r_request->hdr.data_len = cpu_to_le32(*plen + data_len); | |
394 | } else if (data_len) { | |
395 | req->r_request->hdr.data_off = 0; | |
396 | req->r_request->hdr.data_len = cpu_to_le32(data_len); | |
397 | } | |
398 | ||
c5c6b19d SW |
399 | req->r_request->page_alignment = req->r_page_alignment; |
400 | ||
f24e9980 | 401 | BUG_ON(p > msg->front.iov_base + msg->front.iov_len); |
6f863e71 SW |
402 | msg_size = p - msg->front.iov_base; |
403 | msg->front.iov_len = msg_size; | |
404 | msg->hdr.front_len = cpu_to_le32(msg_size); | |
3499e8a5 YS |
405 | return; |
406 | } | |
3d14c5d2 | 407 | EXPORT_SYMBOL(ceph_osdc_build_request); |
3499e8a5 YS |
408 | |
409 | /* | |
410 | * build new request AND message, calculate layout, and adjust file | |
411 | * extent as needed. | |
412 | * | |
413 | * if the file was recently truncated, we include information about its | |
414 | * old and new size so that the object can be updated appropriately. (we | |
415 | * avoid synchronously deleting truncated objects because it's slow.) | |
416 | * | |
417 | * if @do_sync, include a 'startsync' command so that the osd will flush | |
418 | * data quickly. | |
419 | */ | |
420 | struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, | |
421 | struct ceph_file_layout *layout, | |
422 | struct ceph_vino vino, | |
423 | u64 off, u64 *plen, | |
424 | int opcode, int flags, | |
425 | struct ceph_snap_context *snapc, | |
426 | int do_sync, | |
427 | u32 truncate_seq, | |
428 | u64 truncate_size, | |
429 | struct timespec *mtime, | |
b7495fc2 SW |
430 | bool use_mempool, int num_reply, |
431 | int page_align) | |
3499e8a5 | 432 | { |
68b4476b YS |
433 | struct ceph_osd_req_op ops[3]; |
434 | struct ceph_osd_request *req; | |
6816282d | 435 | int r; |
68b4476b YS |
436 | |
437 | ops[0].op = opcode; | |
438 | ops[0].extent.truncate_seq = truncate_seq; | |
439 | ops[0].extent.truncate_size = truncate_size; | |
440 | ops[0].payload_len = 0; | |
441 | ||
442 | if (do_sync) { | |
443 | ops[1].op = CEPH_OSD_OP_STARTSYNC; | |
444 | ops[1].payload_len = 0; | |
445 | ops[2].op = 0; | |
446 | } else | |
447 | ops[1].op = 0; | |
448 | ||
449 | req = ceph_osdc_alloc_request(osdc, flags, | |
450 | snapc, ops, | |
3499e8a5 | 451 | use_mempool, |
68b4476b | 452 | GFP_NOFS, NULL, NULL); |
4ad12621 | 453 | if (!req) |
6816282d | 454 | return ERR_PTR(-ENOMEM); |
3499e8a5 YS |
455 | |
456 | /* calculate max write size */ | |
6816282d SW |
457 | r = calc_layout(osdc, vino, layout, off, plen, req, ops); |
458 | if (r < 0) | |
459 | return ERR_PTR(r); | |
3499e8a5 YS |
460 | req->r_file_layout = *layout; /* keep a copy */ |
461 | ||
9bb0ce2b SW |
462 | /* in case it differs from natural (file) alignment that |
463 | calc_layout filled in for us */ | |
464 | req->r_num_pages = calc_pages_for(page_align, *plen); | |
b7495fc2 SW |
465 | req->r_page_alignment = page_align; |
466 | ||
68b4476b YS |
467 | ceph_osdc_build_request(req, off, plen, ops, |
468 | snapc, | |
af77f26c | 469 | mtime); |
3499e8a5 | 470 | |
f24e9980 SW |
471 | return req; |
472 | } | |
3d14c5d2 | 473 | EXPORT_SYMBOL(ceph_osdc_new_request); |
f24e9980 SW |
474 | |
475 | /* | |
476 | * We keep osd requests in an rbtree, sorted by ->r_tid. | |
477 | */ | |
478 | static void __insert_request(struct ceph_osd_client *osdc, | |
479 | struct ceph_osd_request *new) | |
480 | { | |
481 | struct rb_node **p = &osdc->requests.rb_node; | |
482 | struct rb_node *parent = NULL; | |
483 | struct ceph_osd_request *req = NULL; | |
484 | ||
485 | while (*p) { | |
486 | parent = *p; | |
487 | req = rb_entry(parent, struct ceph_osd_request, r_node); | |
488 | if (new->r_tid < req->r_tid) | |
489 | p = &(*p)->rb_left; | |
490 | else if (new->r_tid > req->r_tid) | |
491 | p = &(*p)->rb_right; | |
492 | else | |
493 | BUG(); | |
494 | } | |
495 | ||
496 | rb_link_node(&new->r_node, parent, p); | |
497 | rb_insert_color(&new->r_node, &osdc->requests); | |
498 | } | |
499 | ||
500 | static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc, | |
501 | u64 tid) | |
502 | { | |
503 | struct ceph_osd_request *req; | |
504 | struct rb_node *n = osdc->requests.rb_node; | |
505 | ||
506 | while (n) { | |
507 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
508 | if (tid < req->r_tid) | |
509 | n = n->rb_left; | |
510 | else if (tid > req->r_tid) | |
511 | n = n->rb_right; | |
512 | else | |
513 | return req; | |
514 | } | |
515 | return NULL; | |
516 | } | |
517 | ||
518 | static struct ceph_osd_request * | |
519 | __lookup_request_ge(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 | if (!n->rb_left) | |
529 | return req; | |
530 | n = n->rb_left; | |
531 | } else if (tid > req->r_tid) { | |
532 | n = n->rb_right; | |
533 | } else { | |
534 | return req; | |
535 | } | |
536 | } | |
537 | return NULL; | |
538 | } | |
539 | ||
6f6c7006 SW |
540 | /* |
541 | * Resubmit requests pending on the given osd. | |
542 | */ | |
543 | static void __kick_osd_requests(struct ceph_osd_client *osdc, | |
544 | struct ceph_osd *osd) | |
545 | { | |
a40c4f10 | 546 | struct ceph_osd_request *req, *nreq; |
6f6c7006 SW |
547 | int err; |
548 | ||
549 | dout("__kick_osd_requests osd%d\n", osd->o_osd); | |
550 | err = __reset_osd(osdc, osd); | |
685a7555 | 551 | if (err) |
6f6c7006 SW |
552 | return; |
553 | ||
554 | list_for_each_entry(req, &osd->o_requests, r_osd_item) { | |
555 | list_move(&req->r_req_lru_item, &osdc->req_unsent); | |
556 | dout("requeued %p tid %llu osd%d\n", req, req->r_tid, | |
557 | osd->o_osd); | |
a40c4f10 YS |
558 | if (!req->r_linger) |
559 | req->r_flags |= CEPH_OSD_FLAG_RETRY; | |
560 | } | |
561 | ||
562 | list_for_each_entry_safe(req, nreq, &osd->o_linger_requests, | |
563 | r_linger_osd) { | |
77f38e0e SW |
564 | /* |
565 | * reregister request prior to unregistering linger so | |
566 | * that r_osd is preserved. | |
567 | */ | |
568 | BUG_ON(!list_empty(&req->r_req_lru_item)); | |
a40c4f10 | 569 | __register_request(osdc, req); |
77f38e0e SW |
570 | list_add(&req->r_req_lru_item, &osdc->req_unsent); |
571 | list_add(&req->r_osd_item, &req->r_osd->o_requests); | |
572 | __unregister_linger_request(osdc, req); | |
a40c4f10 YS |
573 | dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid, |
574 | osd->o_osd); | |
6f6c7006 SW |
575 | } |
576 | } | |
577 | ||
f24e9980 | 578 | /* |
81b024e7 | 579 | * If the osd connection drops, we need to resubmit all requests. |
f24e9980 SW |
580 | */ |
581 | static void osd_reset(struct ceph_connection *con) | |
582 | { | |
583 | struct ceph_osd *osd = con->private; | |
584 | struct ceph_osd_client *osdc; | |
585 | ||
586 | if (!osd) | |
587 | return; | |
588 | dout("osd_reset osd%d\n", osd->o_osd); | |
589 | osdc = osd->o_osdc; | |
f24e9980 | 590 | down_read(&osdc->map_sem); |
83aff95e SW |
591 | mutex_lock(&osdc->request_mutex); |
592 | __kick_osd_requests(osdc, osd); | |
593 | mutex_unlock(&osdc->request_mutex); | |
6f6c7006 | 594 | send_queued(osdc); |
f24e9980 SW |
595 | up_read(&osdc->map_sem); |
596 | } | |
597 | ||
598 | /* | |
599 | * Track open sessions with osds. | |
600 | */ | |
e10006f8 | 601 | static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum) |
f24e9980 SW |
602 | { |
603 | struct ceph_osd *osd; | |
604 | ||
605 | osd = kzalloc(sizeof(*osd), GFP_NOFS); | |
606 | if (!osd) | |
607 | return NULL; | |
608 | ||
609 | atomic_set(&osd->o_ref, 1); | |
610 | osd->o_osdc = osdc; | |
e10006f8 | 611 | osd->o_osd = onum; |
f407731d | 612 | RB_CLEAR_NODE(&osd->o_node); |
f24e9980 | 613 | INIT_LIST_HEAD(&osd->o_requests); |
a40c4f10 | 614 | INIT_LIST_HEAD(&osd->o_linger_requests); |
f5a2041b | 615 | INIT_LIST_HEAD(&osd->o_osd_lru); |
f24e9980 SW |
616 | osd->o_incarnation = 1; |
617 | ||
b7a9e5dd | 618 | ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); |
4e7a5dcd | 619 | |
422d2cb8 | 620 | INIT_LIST_HEAD(&osd->o_keepalive_item); |
f24e9980 SW |
621 | return osd; |
622 | } | |
623 | ||
624 | static struct ceph_osd *get_osd(struct ceph_osd *osd) | |
625 | { | |
626 | if (atomic_inc_not_zero(&osd->o_ref)) { | |
627 | dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1, | |
628 | atomic_read(&osd->o_ref)); | |
629 | return osd; | |
630 | } else { | |
631 | dout("get_osd %p FAIL\n", osd); | |
632 | return NULL; | |
633 | } | |
634 | } | |
635 | ||
636 | static void put_osd(struct ceph_osd *osd) | |
637 | { | |
638 | dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref), | |
639 | atomic_read(&osd->o_ref) - 1); | |
a255651d | 640 | if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) { |
79494d1b SW |
641 | struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth; |
642 | ||
a255651d | 643 | if (ac->ops && ac->ops->destroy_authorizer) |
6c4a1915 | 644 | ac->ops->destroy_authorizer(ac, osd->o_auth.authorizer); |
f24e9980 | 645 | kfree(osd); |
79494d1b | 646 | } |
f24e9980 SW |
647 | } |
648 | ||
649 | /* | |
650 | * remove an osd from our map | |
651 | */ | |
f5a2041b | 652 | static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) |
f24e9980 | 653 | { |
f5a2041b | 654 | dout("__remove_osd %p\n", osd); |
f24e9980 SW |
655 | BUG_ON(!list_empty(&osd->o_requests)); |
656 | rb_erase(&osd->o_node, &osdc->osds); | |
f5a2041b | 657 | list_del_init(&osd->o_osd_lru); |
f24e9980 SW |
658 | ceph_con_close(&osd->o_con); |
659 | put_osd(osd); | |
660 | } | |
661 | ||
aca420bc SW |
662 | static void remove_all_osds(struct ceph_osd_client *osdc) |
663 | { | |
048a9d2d | 664 | dout("%s %p\n", __func__, osdc); |
aca420bc SW |
665 | mutex_lock(&osdc->request_mutex); |
666 | while (!RB_EMPTY_ROOT(&osdc->osds)) { | |
667 | struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), | |
668 | struct ceph_osd, o_node); | |
669 | __remove_osd(osdc, osd); | |
670 | } | |
671 | mutex_unlock(&osdc->request_mutex); | |
672 | } | |
673 | ||
f5a2041b YS |
674 | static void __move_osd_to_lru(struct ceph_osd_client *osdc, |
675 | struct ceph_osd *osd) | |
676 | { | |
677 | dout("__move_osd_to_lru %p\n", osd); | |
678 | BUG_ON(!list_empty(&osd->o_osd_lru)); | |
679 | list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); | |
3d14c5d2 | 680 | osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ; |
f5a2041b YS |
681 | } |
682 | ||
683 | static void __remove_osd_from_lru(struct ceph_osd *osd) | |
684 | { | |
685 | dout("__remove_osd_from_lru %p\n", osd); | |
686 | if (!list_empty(&osd->o_osd_lru)) | |
687 | list_del_init(&osd->o_osd_lru); | |
688 | } | |
689 | ||
aca420bc | 690 | static void remove_old_osds(struct ceph_osd_client *osdc) |
f5a2041b YS |
691 | { |
692 | struct ceph_osd *osd, *nosd; | |
693 | ||
694 | dout("__remove_old_osds %p\n", osdc); | |
695 | mutex_lock(&osdc->request_mutex); | |
696 | list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { | |
aca420bc | 697 | if (time_before(jiffies, osd->lru_ttl)) |
f5a2041b YS |
698 | break; |
699 | __remove_osd(osdc, osd); | |
700 | } | |
701 | mutex_unlock(&osdc->request_mutex); | |
702 | } | |
703 | ||
f24e9980 SW |
704 | /* |
705 | * reset osd connect | |
706 | */ | |
f5a2041b | 707 | static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) |
f24e9980 | 708 | { |
c3acb181 | 709 | struct ceph_entity_addr *peer_addr; |
f24e9980 | 710 | |
f5a2041b | 711 | dout("__reset_osd %p osd%d\n", osd, osd->o_osd); |
a40c4f10 YS |
712 | if (list_empty(&osd->o_requests) && |
713 | list_empty(&osd->o_linger_requests)) { | |
f5a2041b | 714 | __remove_osd(osdc, osd); |
c3acb181 AE |
715 | |
716 | return -ENODEV; | |
717 | } | |
718 | ||
719 | peer_addr = &osdc->osdmap->osd_addr[osd->o_osd]; | |
720 | if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) && | |
721 | !ceph_con_opened(&osd->o_con)) { | |
722 | struct ceph_osd_request *req; | |
723 | ||
87b315a5 SW |
724 | dout(" osd addr hasn't changed and connection never opened," |
725 | " letting msgr retry"); | |
726 | /* touch each r_stamp for handle_timeout()'s benfit */ | |
727 | list_for_each_entry(req, &osd->o_requests, r_osd_item) | |
728 | req->r_stamp = jiffies; | |
c3acb181 AE |
729 | |
730 | return -EAGAIN; | |
f24e9980 | 731 | } |
c3acb181 AE |
732 | |
733 | ceph_con_close(&osd->o_con); | |
734 | ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr); | |
735 | osd->o_incarnation++; | |
736 | ||
737 | return 0; | |
f24e9980 SW |
738 | } |
739 | ||
740 | static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new) | |
741 | { | |
742 | struct rb_node **p = &osdc->osds.rb_node; | |
743 | struct rb_node *parent = NULL; | |
744 | struct ceph_osd *osd = NULL; | |
745 | ||
aca420bc | 746 | dout("__insert_osd %p osd%d\n", new, new->o_osd); |
f24e9980 SW |
747 | while (*p) { |
748 | parent = *p; | |
749 | osd = rb_entry(parent, struct ceph_osd, o_node); | |
750 | if (new->o_osd < osd->o_osd) | |
751 | p = &(*p)->rb_left; | |
752 | else if (new->o_osd > osd->o_osd) | |
753 | p = &(*p)->rb_right; | |
754 | else | |
755 | BUG(); | |
756 | } | |
757 | ||
758 | rb_link_node(&new->o_node, parent, p); | |
759 | rb_insert_color(&new->o_node, &osdc->osds); | |
760 | } | |
761 | ||
762 | static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o) | |
763 | { | |
764 | struct ceph_osd *osd; | |
765 | struct rb_node *n = osdc->osds.rb_node; | |
766 | ||
767 | while (n) { | |
768 | osd = rb_entry(n, struct ceph_osd, o_node); | |
769 | if (o < osd->o_osd) | |
770 | n = n->rb_left; | |
771 | else if (o > osd->o_osd) | |
772 | n = n->rb_right; | |
773 | else | |
774 | return osd; | |
775 | } | |
776 | return NULL; | |
777 | } | |
778 | ||
422d2cb8 YS |
779 | static void __schedule_osd_timeout(struct ceph_osd_client *osdc) |
780 | { | |
781 | schedule_delayed_work(&osdc->timeout_work, | |
3d14c5d2 | 782 | osdc->client->options->osd_keepalive_timeout * HZ); |
422d2cb8 YS |
783 | } |
784 | ||
785 | static void __cancel_osd_timeout(struct ceph_osd_client *osdc) | |
786 | { | |
787 | cancel_delayed_work(&osdc->timeout_work); | |
788 | } | |
f24e9980 SW |
789 | |
790 | /* | |
791 | * Register request, assign tid. If this is the first request, set up | |
792 | * the timeout event. | |
793 | */ | |
a40c4f10 YS |
794 | static void __register_request(struct ceph_osd_client *osdc, |
795 | struct ceph_osd_request *req) | |
f24e9980 | 796 | { |
f24e9980 | 797 | req->r_tid = ++osdc->last_tid; |
6df058c0 | 798 | req->r_request->hdr.tid = cpu_to_le64(req->r_tid); |
77f38e0e | 799 | dout("__register_request %p tid %lld\n", req, req->r_tid); |
f24e9980 SW |
800 | __insert_request(osdc, req); |
801 | ceph_osdc_get_request(req); | |
802 | osdc->num_requests++; | |
f24e9980 | 803 | if (osdc->num_requests == 1) { |
422d2cb8 YS |
804 | dout(" first request, scheduling timeout\n"); |
805 | __schedule_osd_timeout(osdc); | |
f24e9980 | 806 | } |
a40c4f10 YS |
807 | } |
808 | ||
809 | static void register_request(struct ceph_osd_client *osdc, | |
810 | struct ceph_osd_request *req) | |
811 | { | |
812 | mutex_lock(&osdc->request_mutex); | |
813 | __register_request(osdc, req); | |
f24e9980 SW |
814 | mutex_unlock(&osdc->request_mutex); |
815 | } | |
816 | ||
817 | /* | |
818 | * called under osdc->request_mutex | |
819 | */ | |
820 | static void __unregister_request(struct ceph_osd_client *osdc, | |
821 | struct ceph_osd_request *req) | |
822 | { | |
35f9f8a0 SW |
823 | if (RB_EMPTY_NODE(&req->r_node)) { |
824 | dout("__unregister_request %p tid %lld not registered\n", | |
825 | req, req->r_tid); | |
826 | return; | |
827 | } | |
828 | ||
f24e9980 SW |
829 | dout("__unregister_request %p tid %lld\n", req, req->r_tid); |
830 | rb_erase(&req->r_node, &osdc->requests); | |
831 | osdc->num_requests--; | |
832 | ||
0ba6478d SW |
833 | if (req->r_osd) { |
834 | /* make sure the original request isn't in flight. */ | |
6740a845 | 835 | ceph_msg_revoke(req->r_request); |
0ba6478d SW |
836 | |
837 | list_del_init(&req->r_osd_item); | |
a40c4f10 YS |
838 | if (list_empty(&req->r_osd->o_requests) && |
839 | list_empty(&req->r_osd->o_linger_requests)) { | |
840 | dout("moving osd to %p lru\n", req->r_osd); | |
f5a2041b | 841 | __move_osd_to_lru(osdc, req->r_osd); |
a40c4f10 | 842 | } |
fbdb9190 | 843 | if (list_empty(&req->r_linger_item)) |
a40c4f10 | 844 | req->r_osd = NULL; |
0ba6478d | 845 | } |
f24e9980 | 846 | |
7d5f2481 | 847 | list_del_init(&req->r_req_lru_item); |
f24e9980 SW |
848 | ceph_osdc_put_request(req); |
849 | ||
422d2cb8 YS |
850 | if (osdc->num_requests == 0) { |
851 | dout(" no requests, canceling timeout\n"); | |
852 | __cancel_osd_timeout(osdc); | |
f24e9980 SW |
853 | } |
854 | } | |
855 | ||
856 | /* | |
857 | * Cancel a previously queued request message | |
858 | */ | |
859 | static void __cancel_request(struct ceph_osd_request *req) | |
860 | { | |
6bc18876 | 861 | if (req->r_sent && req->r_osd) { |
6740a845 | 862 | ceph_msg_revoke(req->r_request); |
f24e9980 SW |
863 | req->r_sent = 0; |
864 | } | |
865 | } | |
866 | ||
a40c4f10 YS |
867 | static void __register_linger_request(struct ceph_osd_client *osdc, |
868 | struct ceph_osd_request *req) | |
869 | { | |
870 | dout("__register_linger_request %p\n", req); | |
871 | list_add_tail(&req->r_linger_item, &osdc->req_linger); | |
6194ea89 SW |
872 | if (req->r_osd) |
873 | list_add_tail(&req->r_linger_osd, | |
874 | &req->r_osd->o_linger_requests); | |
a40c4f10 YS |
875 | } |
876 | ||
877 | static void __unregister_linger_request(struct ceph_osd_client *osdc, | |
878 | struct ceph_osd_request *req) | |
879 | { | |
880 | dout("__unregister_linger_request %p\n", req); | |
61c74035 | 881 | list_del_init(&req->r_linger_item); |
a40c4f10 | 882 | if (req->r_osd) { |
a40c4f10 YS |
883 | list_del_init(&req->r_linger_osd); |
884 | ||
885 | if (list_empty(&req->r_osd->o_requests) && | |
886 | list_empty(&req->r_osd->o_linger_requests)) { | |
887 | dout("moving osd to %p lru\n", req->r_osd); | |
888 | __move_osd_to_lru(osdc, req->r_osd); | |
889 | } | |
fbdb9190 SW |
890 | if (list_empty(&req->r_osd_item)) |
891 | req->r_osd = NULL; | |
a40c4f10 YS |
892 | } |
893 | } | |
894 | ||
895 | void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc, | |
896 | struct ceph_osd_request *req) | |
897 | { | |
898 | mutex_lock(&osdc->request_mutex); | |
899 | if (req->r_linger) { | |
900 | __unregister_linger_request(osdc, req); | |
901 | ceph_osdc_put_request(req); | |
902 | } | |
903 | mutex_unlock(&osdc->request_mutex); | |
904 | } | |
905 | EXPORT_SYMBOL(ceph_osdc_unregister_linger_request); | |
906 | ||
907 | void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc, | |
908 | struct ceph_osd_request *req) | |
909 | { | |
910 | if (!req->r_linger) { | |
911 | dout("set_request_linger %p\n", req); | |
912 | req->r_linger = 1; | |
913 | /* | |
914 | * caller is now responsible for calling | |
915 | * unregister_linger_request | |
916 | */ | |
917 | ceph_osdc_get_request(req); | |
918 | } | |
919 | } | |
920 | EXPORT_SYMBOL(ceph_osdc_set_request_linger); | |
921 | ||
f24e9980 SW |
922 | /* |
923 | * Pick an osd (the first 'up' osd in the pg), allocate the osd struct | |
924 | * (as needed), and set the request r_osd appropriately. If there is | |
25985edc | 925 | * no up osd, set r_osd to NULL. Move the request to the appropriate list |
6f6c7006 | 926 | * (unsent, homeless) or leave on in-flight lru. |
f24e9980 SW |
927 | * |
928 | * Return 0 if unchanged, 1 if changed, or negative on error. | |
929 | * | |
930 | * Caller should hold map_sem for read and request_mutex. | |
931 | */ | |
6f6c7006 | 932 | static int __map_request(struct ceph_osd_client *osdc, |
38d6453c | 933 | struct ceph_osd_request *req, int force_resend) |
f24e9980 SW |
934 | { |
935 | struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base; | |
51042122 | 936 | struct ceph_pg pgid; |
d85b7056 SW |
937 | int acting[CEPH_PG_MAX_SIZE]; |
938 | int o = -1, num = 0; | |
f24e9980 | 939 | int err; |
f24e9980 | 940 | |
6f6c7006 | 941 | dout("map_request %p tid %lld\n", req, req->r_tid); |
f24e9980 SW |
942 | err = ceph_calc_object_layout(&reqhead->layout, req->r_oid, |
943 | &req->r_file_layout, osdc->osdmap); | |
6f6c7006 SW |
944 | if (err) { |
945 | list_move(&req->r_req_lru_item, &osdc->req_notarget); | |
f24e9980 | 946 | return err; |
6f6c7006 | 947 | } |
51042122 | 948 | pgid = reqhead->layout.ol_pgid; |
7740a42f SW |
949 | req->r_pgid = pgid; |
950 | ||
d85b7056 SW |
951 | err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting); |
952 | if (err > 0) { | |
953 | o = acting[0]; | |
954 | num = err; | |
955 | } | |
f24e9980 | 956 | |
38d6453c SW |
957 | if ((!force_resend && |
958 | req->r_osd && req->r_osd->o_osd == o && | |
d85b7056 SW |
959 | req->r_sent >= req->r_osd->o_incarnation && |
960 | req->r_num_pg_osds == num && | |
961 | memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) || | |
f24e9980 SW |
962 | (req->r_osd == NULL && o == -1)) |
963 | return 0; /* no change */ | |
964 | ||
6f6c7006 | 965 | dout("map_request tid %llu pgid %d.%x osd%d (was osd%d)\n", |
51042122 | 966 | req->r_tid, le32_to_cpu(pgid.pool), le16_to_cpu(pgid.ps), o, |
f24e9980 SW |
967 | req->r_osd ? req->r_osd->o_osd : -1); |
968 | ||
d85b7056 SW |
969 | /* record full pg acting set */ |
970 | memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num); | |
971 | req->r_num_pg_osds = num; | |
972 | ||
f24e9980 SW |
973 | if (req->r_osd) { |
974 | __cancel_request(req); | |
975 | list_del_init(&req->r_osd_item); | |
f24e9980 SW |
976 | req->r_osd = NULL; |
977 | } | |
978 | ||
979 | req->r_osd = __lookup_osd(osdc, o); | |
980 | if (!req->r_osd && o >= 0) { | |
c99eb1c7 | 981 | err = -ENOMEM; |
e10006f8 | 982 | req->r_osd = create_osd(osdc, o); |
6f6c7006 SW |
983 | if (!req->r_osd) { |
984 | list_move(&req->r_req_lru_item, &osdc->req_notarget); | |
c99eb1c7 | 985 | goto out; |
6f6c7006 | 986 | } |
f24e9980 | 987 | |
6f6c7006 | 988 | dout("map_request osd %p is osd%d\n", req->r_osd, o); |
f24e9980 SW |
989 | __insert_osd(osdc, req->r_osd); |
990 | ||
b7a9e5dd SW |
991 | ceph_con_open(&req->r_osd->o_con, |
992 | CEPH_ENTITY_TYPE_OSD, o, | |
993 | &osdc->osdmap->osd_addr[o]); | |
f24e9980 SW |
994 | } |
995 | ||
f5a2041b YS |
996 | if (req->r_osd) { |
997 | __remove_osd_from_lru(req->r_osd); | |
f24e9980 | 998 | list_add(&req->r_osd_item, &req->r_osd->o_requests); |
6f6c7006 SW |
999 | list_move(&req->r_req_lru_item, &osdc->req_unsent); |
1000 | } else { | |
1001 | list_move(&req->r_req_lru_item, &osdc->req_notarget); | |
f5a2041b | 1002 | } |
d85b7056 | 1003 | err = 1; /* osd or pg changed */ |
f24e9980 SW |
1004 | |
1005 | out: | |
f24e9980 SW |
1006 | return err; |
1007 | } | |
1008 | ||
1009 | /* | |
1010 | * caller should hold map_sem (for read) and request_mutex | |
1011 | */ | |
56e925b6 SW |
1012 | static void __send_request(struct ceph_osd_client *osdc, |
1013 | struct ceph_osd_request *req) | |
f24e9980 SW |
1014 | { |
1015 | struct ceph_osd_request_head *reqhead; | |
f24e9980 SW |
1016 | |
1017 | dout("send_request %p tid %llu to osd%d flags %d\n", | |
1018 | req, req->r_tid, req->r_osd->o_osd, req->r_flags); | |
1019 | ||
1020 | reqhead = req->r_request->front.iov_base; | |
1021 | reqhead->osdmap_epoch = cpu_to_le32(osdc->osdmap->epoch); | |
1022 | reqhead->flags |= cpu_to_le32(req->r_flags); /* e.g., RETRY */ | |
1023 | reqhead->reassert_version = req->r_reassert_version; | |
1024 | ||
3dd72fc0 | 1025 | req->r_stamp = jiffies; |
07a27e22 | 1026 | list_move_tail(&req->r_req_lru_item, &osdc->req_lru); |
f24e9980 SW |
1027 | |
1028 | ceph_msg_get(req->r_request); /* send consumes a ref */ | |
1029 | ceph_con_send(&req->r_osd->o_con, req->r_request); | |
1030 | req->r_sent = req->r_osd->o_incarnation; | |
f24e9980 SW |
1031 | } |
1032 | ||
6f6c7006 SW |
1033 | /* |
1034 | * Send any requests in the queue (req_unsent). | |
1035 | */ | |
1036 | static void send_queued(struct ceph_osd_client *osdc) | |
1037 | { | |
1038 | struct ceph_osd_request *req, *tmp; | |
1039 | ||
1040 | dout("send_queued\n"); | |
1041 | mutex_lock(&osdc->request_mutex); | |
1042 | list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item) { | |
1043 | __send_request(osdc, req); | |
1044 | } | |
1045 | mutex_unlock(&osdc->request_mutex); | |
1046 | } | |
1047 | ||
f24e9980 SW |
1048 | /* |
1049 | * Timeout callback, called every N seconds when 1 or more osd | |
1050 | * requests has been active for more than N seconds. When this | |
1051 | * happens, we ping all OSDs with requests who have timed out to | |
1052 | * ensure any communications channel reset is detected. Reset the | |
1053 | * request timeouts another N seconds in the future as we go. | |
1054 | * Reschedule the timeout event another N seconds in future (unless | |
1055 | * there are no open requests). | |
1056 | */ | |
1057 | static void handle_timeout(struct work_struct *work) | |
1058 | { | |
1059 | struct ceph_osd_client *osdc = | |
1060 | container_of(work, struct ceph_osd_client, timeout_work.work); | |
83aff95e | 1061 | struct ceph_osd_request *req; |
f24e9980 | 1062 | struct ceph_osd *osd; |
422d2cb8 | 1063 | unsigned long keepalive = |
3d14c5d2 | 1064 | osdc->client->options->osd_keepalive_timeout * HZ; |
422d2cb8 | 1065 | struct list_head slow_osds; |
f24e9980 SW |
1066 | dout("timeout\n"); |
1067 | down_read(&osdc->map_sem); | |
1068 | ||
1069 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1070 | ||
1071 | mutex_lock(&osdc->request_mutex); | |
f24e9980 | 1072 | |
422d2cb8 YS |
1073 | /* |
1074 | * ping osds that are a bit slow. this ensures that if there | |
1075 | * is a break in the TCP connection we will notice, and reopen | |
1076 | * a connection with that osd (from the fault callback). | |
1077 | */ | |
1078 | INIT_LIST_HEAD(&slow_osds); | |
1079 | list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) { | |
3dd72fc0 | 1080 | if (time_before(jiffies, req->r_stamp + keepalive)) |
422d2cb8 YS |
1081 | break; |
1082 | ||
1083 | osd = req->r_osd; | |
1084 | BUG_ON(!osd); | |
1085 | dout(" tid %llu is slow, will send keepalive on osd%d\n", | |
f24e9980 | 1086 | req->r_tid, osd->o_osd); |
422d2cb8 YS |
1087 | list_move_tail(&osd->o_keepalive_item, &slow_osds); |
1088 | } | |
1089 | while (!list_empty(&slow_osds)) { | |
1090 | osd = list_entry(slow_osds.next, struct ceph_osd, | |
1091 | o_keepalive_item); | |
1092 | list_del_init(&osd->o_keepalive_item); | |
f24e9980 SW |
1093 | ceph_con_keepalive(&osd->o_con); |
1094 | } | |
1095 | ||
422d2cb8 | 1096 | __schedule_osd_timeout(osdc); |
f24e9980 | 1097 | mutex_unlock(&osdc->request_mutex); |
6f6c7006 | 1098 | send_queued(osdc); |
f24e9980 SW |
1099 | up_read(&osdc->map_sem); |
1100 | } | |
1101 | ||
f5a2041b YS |
1102 | static void handle_osds_timeout(struct work_struct *work) |
1103 | { | |
1104 | struct ceph_osd_client *osdc = | |
1105 | container_of(work, struct ceph_osd_client, | |
1106 | osds_timeout_work.work); | |
1107 | unsigned long delay = | |
3d14c5d2 | 1108 | osdc->client->options->osd_idle_ttl * HZ >> 2; |
f5a2041b YS |
1109 | |
1110 | dout("osds timeout\n"); | |
1111 | down_read(&osdc->map_sem); | |
aca420bc | 1112 | remove_old_osds(osdc); |
f5a2041b YS |
1113 | up_read(&osdc->map_sem); |
1114 | ||
1115 | schedule_delayed_work(&osdc->osds_timeout_work, | |
1116 | round_jiffies_relative(delay)); | |
1117 | } | |
1118 | ||
25845472 SW |
1119 | static void complete_request(struct ceph_osd_request *req) |
1120 | { | |
1121 | if (req->r_safe_callback) | |
1122 | req->r_safe_callback(req, NULL); | |
1123 | complete_all(&req->r_safe_completion); /* fsync waiter */ | |
1124 | } | |
1125 | ||
f24e9980 SW |
1126 | /* |
1127 | * handle osd op reply. either call the callback if it is specified, | |
1128 | * or do the completion to wake up the waiting thread. | |
1129 | */ | |
350b1c32 SW |
1130 | static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg, |
1131 | struct ceph_connection *con) | |
f24e9980 SW |
1132 | { |
1133 | struct ceph_osd_reply_head *rhead = msg->front.iov_base; | |
1134 | struct ceph_osd_request *req; | |
1135 | u64 tid; | |
1136 | int numops, object_len, flags; | |
0ceed5db | 1137 | s32 result; |
f24e9980 | 1138 | |
6df058c0 | 1139 | tid = le64_to_cpu(msg->hdr.tid); |
f24e9980 SW |
1140 | if (msg->front.iov_len < sizeof(*rhead)) |
1141 | goto bad; | |
f24e9980 SW |
1142 | numops = le32_to_cpu(rhead->num_ops); |
1143 | object_len = le32_to_cpu(rhead->object_len); | |
0ceed5db | 1144 | result = le32_to_cpu(rhead->result); |
f24e9980 SW |
1145 | if (msg->front.iov_len != sizeof(*rhead) + object_len + |
1146 | numops * sizeof(struct ceph_osd_op)) | |
1147 | goto bad; | |
0ceed5db | 1148 | dout("handle_reply %p tid %llu result %d\n", msg, tid, (int)result); |
f24e9980 SW |
1149 | /* lookup */ |
1150 | mutex_lock(&osdc->request_mutex); | |
1151 | req = __lookup_request(osdc, tid); | |
1152 | if (req == NULL) { | |
1153 | dout("handle_reply tid %llu dne\n", tid); | |
1154 | mutex_unlock(&osdc->request_mutex); | |
1155 | return; | |
1156 | } | |
1157 | ceph_osdc_get_request(req); | |
1158 | flags = le32_to_cpu(rhead->flags); | |
1159 | ||
350b1c32 | 1160 | /* |
0d59ab81 | 1161 | * if this connection filled our message, drop our reference now, to |
350b1c32 SW |
1162 | * avoid a (safe but slower) revoke later. |
1163 | */ | |
0d59ab81 | 1164 | if (req->r_con_filling_msg == con && req->r_reply == msg) { |
c16e7869 | 1165 | dout(" dropping con_filling_msg ref %p\n", con); |
0d59ab81 | 1166 | req->r_con_filling_msg = NULL; |
0d47766f | 1167 | con->ops->put(con); |
350b1c32 SW |
1168 | } |
1169 | ||
f24e9980 | 1170 | if (!req->r_got_reply) { |
95c96174 | 1171 | unsigned int bytes; |
f24e9980 SW |
1172 | |
1173 | req->r_result = le32_to_cpu(rhead->result); | |
1174 | bytes = le32_to_cpu(msg->hdr.data_len); | |
1175 | dout("handle_reply result %d bytes %d\n", req->r_result, | |
1176 | bytes); | |
1177 | if (req->r_result == 0) | |
1178 | req->r_result = bytes; | |
1179 | ||
1180 | /* in case this is a write and we need to replay, */ | |
1181 | req->r_reassert_version = rhead->reassert_version; | |
1182 | ||
1183 | req->r_got_reply = 1; | |
1184 | } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) { | |
1185 | dout("handle_reply tid %llu dup ack\n", tid); | |
34b43a56 | 1186 | mutex_unlock(&osdc->request_mutex); |
f24e9980 SW |
1187 | goto done; |
1188 | } | |
1189 | ||
1190 | dout("handle_reply tid %llu flags %d\n", tid, flags); | |
1191 | ||
a40c4f10 YS |
1192 | if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK)) |
1193 | __register_linger_request(osdc, req); | |
1194 | ||
f24e9980 | 1195 | /* either this is a read, or we got the safe response */ |
0ceed5db SW |
1196 | if (result < 0 || |
1197 | (flags & CEPH_OSD_FLAG_ONDISK) || | |
f24e9980 SW |
1198 | ((flags & CEPH_OSD_FLAG_WRITE) == 0)) |
1199 | __unregister_request(osdc, req); | |
1200 | ||
1201 | mutex_unlock(&osdc->request_mutex); | |
1202 | ||
1203 | if (req->r_callback) | |
1204 | req->r_callback(req, msg); | |
1205 | else | |
03066f23 | 1206 | complete_all(&req->r_completion); |
f24e9980 | 1207 | |
25845472 SW |
1208 | if (flags & CEPH_OSD_FLAG_ONDISK) |
1209 | complete_request(req); | |
f24e9980 SW |
1210 | |
1211 | done: | |
a40c4f10 | 1212 | dout("req=%p req->r_linger=%d\n", req, req->r_linger); |
f24e9980 SW |
1213 | ceph_osdc_put_request(req); |
1214 | return; | |
1215 | ||
1216 | bad: | |
1217 | pr_err("corrupt osd_op_reply got %d %d expected %d\n", | |
1218 | (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len), | |
1219 | (int)sizeof(*rhead)); | |
9ec7cab1 | 1220 | ceph_msg_dump(msg); |
f24e9980 SW |
1221 | } |
1222 | ||
6f6c7006 | 1223 | static void reset_changed_osds(struct ceph_osd_client *osdc) |
f24e9980 | 1224 | { |
f24e9980 | 1225 | struct rb_node *p, *n; |
f24e9980 | 1226 | |
6f6c7006 SW |
1227 | for (p = rb_first(&osdc->osds); p; p = n) { |
1228 | struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node); | |
f24e9980 | 1229 | |
6f6c7006 SW |
1230 | n = rb_next(p); |
1231 | if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || | |
1232 | memcmp(&osd->o_con.peer_addr, | |
1233 | ceph_osd_addr(osdc->osdmap, | |
1234 | osd->o_osd), | |
1235 | sizeof(struct ceph_entity_addr)) != 0) | |
1236 | __reset_osd(osdc, osd); | |
f24e9980 | 1237 | } |
422d2cb8 YS |
1238 | } |
1239 | ||
1240 | /* | |
6f6c7006 SW |
1241 | * Requeue requests whose mapping to an OSD has changed. If requests map to |
1242 | * no osd, request a new map. | |
422d2cb8 | 1243 | * |
e6d50f67 | 1244 | * Caller should hold map_sem for read. |
422d2cb8 | 1245 | */ |
38d6453c | 1246 | static void kick_requests(struct ceph_osd_client *osdc, int force_resend) |
422d2cb8 | 1247 | { |
a40c4f10 | 1248 | struct ceph_osd_request *req, *nreq; |
6f6c7006 SW |
1249 | struct rb_node *p; |
1250 | int needmap = 0; | |
1251 | int err; | |
422d2cb8 | 1252 | |
38d6453c | 1253 | dout("kick_requests %s\n", force_resend ? " (force resend)" : ""); |
422d2cb8 | 1254 | mutex_lock(&osdc->request_mutex); |
6194ea89 | 1255 | for (p = rb_first(&osdc->requests); p; ) { |
6f6c7006 | 1256 | req = rb_entry(p, struct ceph_osd_request, r_node); |
6194ea89 | 1257 | p = rb_next(p); |
ab60b16d AE |
1258 | |
1259 | /* | |
1260 | * For linger requests that have not yet been | |
1261 | * registered, move them to the linger list; they'll | |
1262 | * be sent to the osd in the loop below. Unregister | |
1263 | * the request before re-registering it as a linger | |
1264 | * request to ensure the __map_request() below | |
1265 | * will decide it needs to be sent. | |
1266 | */ | |
1267 | if (req->r_linger && list_empty(&req->r_linger_item)) { | |
1268 | dout("%p tid %llu restart on osd%d\n", | |
1269 | req, req->r_tid, | |
1270 | req->r_osd ? req->r_osd->o_osd : -1); | |
1271 | __unregister_request(osdc, req); | |
1272 | __register_linger_request(osdc, req); | |
1273 | continue; | |
1274 | } | |
1275 | ||
38d6453c | 1276 | err = __map_request(osdc, req, force_resend); |
6f6c7006 SW |
1277 | if (err < 0) |
1278 | continue; /* error */ | |
1279 | if (req->r_osd == NULL) { | |
1280 | dout("%p tid %llu maps to no osd\n", req, req->r_tid); | |
1281 | needmap++; /* request a newer map */ | |
1282 | } else if (err > 0) { | |
6194ea89 SW |
1283 | if (!req->r_linger) { |
1284 | dout("%p tid %llu requeued on osd%d\n", req, | |
1285 | req->r_tid, | |
1286 | req->r_osd ? req->r_osd->o_osd : -1); | |
a40c4f10 | 1287 | req->r_flags |= CEPH_OSD_FLAG_RETRY; |
6194ea89 SW |
1288 | } |
1289 | } | |
a40c4f10 YS |
1290 | } |
1291 | ||
1292 | list_for_each_entry_safe(req, nreq, &osdc->req_linger, | |
1293 | r_linger_item) { | |
1294 | dout("linger req=%p req->r_osd=%p\n", req, req->r_osd); | |
1295 | ||
38d6453c | 1296 | err = __map_request(osdc, req, force_resend); |
ab60b16d | 1297 | dout("__map_request returned %d\n", err); |
a40c4f10 YS |
1298 | if (err == 0) |
1299 | continue; /* no change and no osd was specified */ | |
1300 | if (err < 0) | |
1301 | continue; /* hrm! */ | |
1302 | if (req->r_osd == NULL) { | |
1303 | dout("tid %llu maps to no valid osd\n", req->r_tid); | |
1304 | needmap++; /* request a newer map */ | |
1305 | continue; | |
6f6c7006 | 1306 | } |
a40c4f10 YS |
1307 | |
1308 | dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid, | |
1309 | req->r_osd ? req->r_osd->o_osd : -1); | |
a40c4f10 | 1310 | __register_request(osdc, req); |
c89ce05e | 1311 | __unregister_linger_request(osdc, req); |
6f6c7006 | 1312 | } |
f24e9980 SW |
1313 | mutex_unlock(&osdc->request_mutex); |
1314 | ||
1315 | if (needmap) { | |
1316 | dout("%d requests for down osds, need new map\n", needmap); | |
1317 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1318 | } | |
e6d50f67 | 1319 | reset_changed_osds(osdc); |
422d2cb8 | 1320 | } |
6f6c7006 SW |
1321 | |
1322 | ||
f24e9980 SW |
1323 | /* |
1324 | * Process updated osd map. | |
1325 | * | |
1326 | * The message contains any number of incremental and full maps, normally | |
1327 | * indicating some sort of topology change in the cluster. Kick requests | |
1328 | * off to different OSDs as needed. | |
1329 | */ | |
1330 | void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) | |
1331 | { | |
1332 | void *p, *end, *next; | |
1333 | u32 nr_maps, maplen; | |
1334 | u32 epoch; | |
1335 | struct ceph_osdmap *newmap = NULL, *oldmap; | |
1336 | int err; | |
1337 | struct ceph_fsid fsid; | |
1338 | ||
1339 | dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0); | |
1340 | p = msg->front.iov_base; | |
1341 | end = p + msg->front.iov_len; | |
1342 | ||
1343 | /* verify fsid */ | |
1344 | ceph_decode_need(&p, end, sizeof(fsid), bad); | |
1345 | ceph_decode_copy(&p, &fsid, sizeof(fsid)); | |
0743304d SW |
1346 | if (ceph_check_fsid(osdc->client, &fsid) < 0) |
1347 | return; | |
f24e9980 SW |
1348 | |
1349 | down_write(&osdc->map_sem); | |
1350 | ||
1351 | /* incremental maps */ | |
1352 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
1353 | dout(" %d inc maps\n", nr_maps); | |
1354 | while (nr_maps > 0) { | |
1355 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
1356 | epoch = ceph_decode_32(&p); |
1357 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
1358 | ceph_decode_need(&p, end, maplen, bad); |
1359 | next = p + maplen; | |
1360 | if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) { | |
1361 | dout("applying incremental map %u len %d\n", | |
1362 | epoch, maplen); | |
1363 | newmap = osdmap_apply_incremental(&p, next, | |
1364 | osdc->osdmap, | |
15d9882c | 1365 | &osdc->client->msgr); |
f24e9980 SW |
1366 | if (IS_ERR(newmap)) { |
1367 | err = PTR_ERR(newmap); | |
1368 | goto bad; | |
1369 | } | |
30dc6381 | 1370 | BUG_ON(!newmap); |
f24e9980 SW |
1371 | if (newmap != osdc->osdmap) { |
1372 | ceph_osdmap_destroy(osdc->osdmap); | |
1373 | osdc->osdmap = newmap; | |
1374 | } | |
38d6453c | 1375 | kick_requests(osdc, 0); |
f24e9980 SW |
1376 | } else { |
1377 | dout("ignoring incremental map %u len %d\n", | |
1378 | epoch, maplen); | |
1379 | } | |
1380 | p = next; | |
1381 | nr_maps--; | |
1382 | } | |
1383 | if (newmap) | |
1384 | goto done; | |
1385 | ||
1386 | /* full maps */ | |
1387 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
1388 | dout(" %d full maps\n", nr_maps); | |
1389 | while (nr_maps) { | |
1390 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
1391 | epoch = ceph_decode_32(&p); |
1392 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
1393 | ceph_decode_need(&p, end, maplen, bad); |
1394 | if (nr_maps > 1) { | |
1395 | dout("skipping non-latest full map %u len %d\n", | |
1396 | epoch, maplen); | |
1397 | } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) { | |
1398 | dout("skipping full map %u len %d, " | |
1399 | "older than our %u\n", epoch, maplen, | |
1400 | osdc->osdmap->epoch); | |
1401 | } else { | |
38d6453c SW |
1402 | int skipped_map = 0; |
1403 | ||
f24e9980 SW |
1404 | dout("taking full map %u len %d\n", epoch, maplen); |
1405 | newmap = osdmap_decode(&p, p+maplen); | |
1406 | if (IS_ERR(newmap)) { | |
1407 | err = PTR_ERR(newmap); | |
1408 | goto bad; | |
1409 | } | |
30dc6381 | 1410 | BUG_ON(!newmap); |
f24e9980 SW |
1411 | oldmap = osdc->osdmap; |
1412 | osdc->osdmap = newmap; | |
38d6453c SW |
1413 | if (oldmap) { |
1414 | if (oldmap->epoch + 1 < newmap->epoch) | |
1415 | skipped_map = 1; | |
f24e9980 | 1416 | ceph_osdmap_destroy(oldmap); |
38d6453c SW |
1417 | } |
1418 | kick_requests(osdc, skipped_map); | |
f24e9980 SW |
1419 | } |
1420 | p += maplen; | |
1421 | nr_maps--; | |
1422 | } | |
1423 | ||
1424 | done: | |
1425 | downgrade_write(&osdc->map_sem); | |
1426 | ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch); | |
cd634fb6 SW |
1427 | |
1428 | /* | |
1429 | * subscribe to subsequent osdmap updates if full to ensure | |
1430 | * we find out when we are no longer full and stop returning | |
1431 | * ENOSPC. | |
1432 | */ | |
1433 | if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL)) | |
1434 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1435 | ||
6f6c7006 | 1436 | send_queued(osdc); |
f24e9980 | 1437 | up_read(&osdc->map_sem); |
03066f23 | 1438 | wake_up_all(&osdc->client->auth_wq); |
f24e9980 SW |
1439 | return; |
1440 | ||
1441 | bad: | |
1442 | pr_err("osdc handle_map corrupt msg\n"); | |
9ec7cab1 | 1443 | ceph_msg_dump(msg); |
f24e9980 SW |
1444 | up_write(&osdc->map_sem); |
1445 | return; | |
1446 | } | |
1447 | ||
a40c4f10 YS |
1448 | /* |
1449 | * watch/notify callback event infrastructure | |
1450 | * | |
1451 | * These callbacks are used both for watch and notify operations. | |
1452 | */ | |
1453 | static void __release_event(struct kref *kref) | |
1454 | { | |
1455 | struct ceph_osd_event *event = | |
1456 | container_of(kref, struct ceph_osd_event, kref); | |
1457 | ||
1458 | dout("__release_event %p\n", event); | |
1459 | kfree(event); | |
1460 | } | |
1461 | ||
1462 | static void get_event(struct ceph_osd_event *event) | |
1463 | { | |
1464 | kref_get(&event->kref); | |
1465 | } | |
1466 | ||
1467 | void ceph_osdc_put_event(struct ceph_osd_event *event) | |
1468 | { | |
1469 | kref_put(&event->kref, __release_event); | |
1470 | } | |
1471 | EXPORT_SYMBOL(ceph_osdc_put_event); | |
1472 | ||
1473 | static void __insert_event(struct ceph_osd_client *osdc, | |
1474 | struct ceph_osd_event *new) | |
1475 | { | |
1476 | struct rb_node **p = &osdc->event_tree.rb_node; | |
1477 | struct rb_node *parent = NULL; | |
1478 | struct ceph_osd_event *event = NULL; | |
1479 | ||
1480 | while (*p) { | |
1481 | parent = *p; | |
1482 | event = rb_entry(parent, struct ceph_osd_event, node); | |
1483 | if (new->cookie < event->cookie) | |
1484 | p = &(*p)->rb_left; | |
1485 | else if (new->cookie > event->cookie) | |
1486 | p = &(*p)->rb_right; | |
1487 | else | |
1488 | BUG(); | |
1489 | } | |
1490 | ||
1491 | rb_link_node(&new->node, parent, p); | |
1492 | rb_insert_color(&new->node, &osdc->event_tree); | |
1493 | } | |
1494 | ||
1495 | static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc, | |
1496 | u64 cookie) | |
1497 | { | |
1498 | struct rb_node **p = &osdc->event_tree.rb_node; | |
1499 | struct rb_node *parent = NULL; | |
1500 | struct ceph_osd_event *event = NULL; | |
1501 | ||
1502 | while (*p) { | |
1503 | parent = *p; | |
1504 | event = rb_entry(parent, struct ceph_osd_event, node); | |
1505 | if (cookie < event->cookie) | |
1506 | p = &(*p)->rb_left; | |
1507 | else if (cookie > event->cookie) | |
1508 | p = &(*p)->rb_right; | |
1509 | else | |
1510 | return event; | |
1511 | } | |
1512 | return NULL; | |
1513 | } | |
1514 | ||
1515 | static void __remove_event(struct ceph_osd_event *event) | |
1516 | { | |
1517 | struct ceph_osd_client *osdc = event->osdc; | |
1518 | ||
1519 | if (!RB_EMPTY_NODE(&event->node)) { | |
1520 | dout("__remove_event removed %p\n", event); | |
1521 | rb_erase(&event->node, &osdc->event_tree); | |
1522 | ceph_osdc_put_event(event); | |
1523 | } else { | |
1524 | dout("__remove_event didn't remove %p\n", event); | |
1525 | } | |
1526 | } | |
1527 | ||
1528 | int ceph_osdc_create_event(struct ceph_osd_client *osdc, | |
1529 | void (*event_cb)(u64, u64, u8, void *), | |
1530 | int one_shot, void *data, | |
1531 | struct ceph_osd_event **pevent) | |
1532 | { | |
1533 | struct ceph_osd_event *event; | |
1534 | ||
1535 | event = kmalloc(sizeof(*event), GFP_NOIO); | |
1536 | if (!event) | |
1537 | return -ENOMEM; | |
1538 | ||
1539 | dout("create_event %p\n", event); | |
1540 | event->cb = event_cb; | |
1541 | event->one_shot = one_shot; | |
1542 | event->data = data; | |
1543 | event->osdc = osdc; | |
1544 | INIT_LIST_HEAD(&event->osd_node); | |
3ee5234d | 1545 | RB_CLEAR_NODE(&event->node); |
a40c4f10 YS |
1546 | kref_init(&event->kref); /* one ref for us */ |
1547 | kref_get(&event->kref); /* one ref for the caller */ | |
1548 | init_completion(&event->completion); | |
1549 | ||
1550 | spin_lock(&osdc->event_lock); | |
1551 | event->cookie = ++osdc->event_count; | |
1552 | __insert_event(osdc, event); | |
1553 | spin_unlock(&osdc->event_lock); | |
1554 | ||
1555 | *pevent = event; | |
1556 | return 0; | |
1557 | } | |
1558 | EXPORT_SYMBOL(ceph_osdc_create_event); | |
1559 | ||
1560 | void ceph_osdc_cancel_event(struct ceph_osd_event *event) | |
1561 | { | |
1562 | struct ceph_osd_client *osdc = event->osdc; | |
1563 | ||
1564 | dout("cancel_event %p\n", event); | |
1565 | spin_lock(&osdc->event_lock); | |
1566 | __remove_event(event); | |
1567 | spin_unlock(&osdc->event_lock); | |
1568 | ceph_osdc_put_event(event); /* caller's */ | |
1569 | } | |
1570 | EXPORT_SYMBOL(ceph_osdc_cancel_event); | |
1571 | ||
1572 | ||
1573 | static void do_event_work(struct work_struct *work) | |
1574 | { | |
1575 | struct ceph_osd_event_work *event_work = | |
1576 | container_of(work, struct ceph_osd_event_work, work); | |
1577 | struct ceph_osd_event *event = event_work->event; | |
1578 | u64 ver = event_work->ver; | |
1579 | u64 notify_id = event_work->notify_id; | |
1580 | u8 opcode = event_work->opcode; | |
1581 | ||
1582 | dout("do_event_work completing %p\n", event); | |
1583 | event->cb(ver, notify_id, opcode, event->data); | |
1584 | complete(&event->completion); | |
1585 | dout("do_event_work completed %p\n", event); | |
1586 | ceph_osdc_put_event(event); | |
1587 | kfree(event_work); | |
1588 | } | |
1589 | ||
1590 | ||
1591 | /* | |
1592 | * Process osd watch notifications | |
1593 | */ | |
1594 | void handle_watch_notify(struct ceph_osd_client *osdc, struct ceph_msg *msg) | |
1595 | { | |
1596 | void *p, *end; | |
1597 | u8 proto_ver; | |
1598 | u64 cookie, ver, notify_id; | |
1599 | u8 opcode; | |
1600 | struct ceph_osd_event *event; | |
1601 | struct ceph_osd_event_work *event_work; | |
1602 | ||
1603 | p = msg->front.iov_base; | |
1604 | end = p + msg->front.iov_len; | |
1605 | ||
1606 | ceph_decode_8_safe(&p, end, proto_ver, bad); | |
1607 | ceph_decode_8_safe(&p, end, opcode, bad); | |
1608 | ceph_decode_64_safe(&p, end, cookie, bad); | |
1609 | ceph_decode_64_safe(&p, end, ver, bad); | |
1610 | ceph_decode_64_safe(&p, end, notify_id, bad); | |
1611 | ||
1612 | spin_lock(&osdc->event_lock); | |
1613 | event = __find_event(osdc, cookie); | |
1614 | if (event) { | |
1615 | get_event(event); | |
1616 | if (event->one_shot) | |
1617 | __remove_event(event); | |
1618 | } | |
1619 | spin_unlock(&osdc->event_lock); | |
1620 | dout("handle_watch_notify cookie %lld ver %lld event %p\n", | |
1621 | cookie, ver, event); | |
1622 | if (event) { | |
1623 | event_work = kmalloc(sizeof(*event_work), GFP_NOIO); | |
a40c4f10 YS |
1624 | if (!event_work) { |
1625 | dout("ERROR: could not allocate event_work\n"); | |
1626 | goto done_err; | |
1627 | } | |
6b0ae409 | 1628 | INIT_WORK(&event_work->work, do_event_work); |
a40c4f10 YS |
1629 | event_work->event = event; |
1630 | event_work->ver = ver; | |
1631 | event_work->notify_id = notify_id; | |
1632 | event_work->opcode = opcode; | |
1633 | if (!queue_work(osdc->notify_wq, &event_work->work)) { | |
1634 | dout("WARNING: failed to queue notify event work\n"); | |
1635 | goto done_err; | |
1636 | } | |
1637 | } | |
1638 | ||
1639 | return; | |
1640 | ||
1641 | done_err: | |
1642 | complete(&event->completion); | |
1643 | ceph_osdc_put_event(event); | |
1644 | return; | |
1645 | ||
1646 | bad: | |
1647 | pr_err("osdc handle_watch_notify corrupt msg\n"); | |
1648 | return; | |
1649 | } | |
1650 | ||
1651 | int ceph_osdc_wait_event(struct ceph_osd_event *event, unsigned long timeout) | |
1652 | { | |
1653 | int err; | |
1654 | ||
1655 | dout("wait_event %p\n", event); | |
1656 | err = wait_for_completion_interruptible_timeout(&event->completion, | |
1657 | timeout * HZ); | |
1658 | ceph_osdc_put_event(event); | |
1659 | if (err > 0) | |
1660 | err = 0; | |
1661 | dout("wait_event %p returns %d\n", event, err); | |
1662 | return err; | |
1663 | } | |
1664 | EXPORT_SYMBOL(ceph_osdc_wait_event); | |
1665 | ||
f24e9980 SW |
1666 | /* |
1667 | * Register request, send initial attempt. | |
1668 | */ | |
1669 | int ceph_osdc_start_request(struct ceph_osd_client *osdc, | |
1670 | struct ceph_osd_request *req, | |
1671 | bool nofail) | |
1672 | { | |
c1ea8823 | 1673 | int rc = 0; |
f24e9980 SW |
1674 | |
1675 | req->r_request->pages = req->r_pages; | |
1676 | req->r_request->nr_pages = req->r_num_pages; | |
68b4476b YS |
1677 | #ifdef CONFIG_BLOCK |
1678 | req->r_request->bio = req->r_bio; | |
1679 | #endif | |
c885837f | 1680 | req->r_request->trail = &req->r_trail; |
f24e9980 SW |
1681 | |
1682 | register_request(osdc, req); | |
1683 | ||
1684 | down_read(&osdc->map_sem); | |
1685 | mutex_lock(&osdc->request_mutex); | |
c1ea8823 SW |
1686 | /* |
1687 | * a racing kick_requests() may have sent the message for us | |
1688 | * while we dropped request_mutex above, so only send now if | |
1689 | * the request still han't been touched yet. | |
1690 | */ | |
1691 | if (req->r_sent == 0) { | |
38d6453c | 1692 | rc = __map_request(osdc, req, 0); |
9d6fcb08 SW |
1693 | if (rc < 0) { |
1694 | if (nofail) { | |
1695 | dout("osdc_start_request failed map, " | |
1696 | " will retry %lld\n", req->r_tid); | |
1697 | rc = 0; | |
1698 | } | |
234af26f | 1699 | goto out_unlock; |
9d6fcb08 | 1700 | } |
6f6c7006 SW |
1701 | if (req->r_osd == NULL) { |
1702 | dout("send_request %p no up osds in pg\n", req); | |
1703 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
1704 | } else { | |
56e925b6 | 1705 | __send_request(osdc, req); |
f24e9980 | 1706 | } |
56e925b6 | 1707 | rc = 0; |
f24e9980 | 1708 | } |
234af26f DC |
1709 | |
1710 | out_unlock: | |
f24e9980 SW |
1711 | mutex_unlock(&osdc->request_mutex); |
1712 | up_read(&osdc->map_sem); | |
1713 | return rc; | |
1714 | } | |
3d14c5d2 | 1715 | EXPORT_SYMBOL(ceph_osdc_start_request); |
f24e9980 SW |
1716 | |
1717 | /* | |
1718 | * wait for a request to complete | |
1719 | */ | |
1720 | int ceph_osdc_wait_request(struct ceph_osd_client *osdc, | |
1721 | struct ceph_osd_request *req) | |
1722 | { | |
1723 | int rc; | |
1724 | ||
1725 | rc = wait_for_completion_interruptible(&req->r_completion); | |
1726 | if (rc < 0) { | |
1727 | mutex_lock(&osdc->request_mutex); | |
1728 | __cancel_request(req); | |
529cfcc4 | 1729 | __unregister_request(osdc, req); |
f24e9980 | 1730 | mutex_unlock(&osdc->request_mutex); |
25845472 | 1731 | complete_request(req); |
529cfcc4 | 1732 | dout("wait_request tid %llu canceled/timed out\n", req->r_tid); |
f24e9980 SW |
1733 | return rc; |
1734 | } | |
1735 | ||
1736 | dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result); | |
1737 | return req->r_result; | |
1738 | } | |
3d14c5d2 | 1739 | EXPORT_SYMBOL(ceph_osdc_wait_request); |
f24e9980 SW |
1740 | |
1741 | /* | |
1742 | * sync - wait for all in-flight requests to flush. avoid starvation. | |
1743 | */ | |
1744 | void ceph_osdc_sync(struct ceph_osd_client *osdc) | |
1745 | { | |
1746 | struct ceph_osd_request *req; | |
1747 | u64 last_tid, next_tid = 0; | |
1748 | ||
1749 | mutex_lock(&osdc->request_mutex); | |
1750 | last_tid = osdc->last_tid; | |
1751 | while (1) { | |
1752 | req = __lookup_request_ge(osdc, next_tid); | |
1753 | if (!req) | |
1754 | break; | |
1755 | if (req->r_tid > last_tid) | |
1756 | break; | |
1757 | ||
1758 | next_tid = req->r_tid + 1; | |
1759 | if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0) | |
1760 | continue; | |
1761 | ||
1762 | ceph_osdc_get_request(req); | |
1763 | mutex_unlock(&osdc->request_mutex); | |
1764 | dout("sync waiting on tid %llu (last is %llu)\n", | |
1765 | req->r_tid, last_tid); | |
1766 | wait_for_completion(&req->r_safe_completion); | |
1767 | mutex_lock(&osdc->request_mutex); | |
1768 | ceph_osdc_put_request(req); | |
1769 | } | |
1770 | mutex_unlock(&osdc->request_mutex); | |
1771 | dout("sync done (thru tid %llu)\n", last_tid); | |
1772 | } | |
3d14c5d2 | 1773 | EXPORT_SYMBOL(ceph_osdc_sync); |
f24e9980 SW |
1774 | |
1775 | /* | |
1776 | * init, shutdown | |
1777 | */ | |
1778 | int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) | |
1779 | { | |
1780 | int err; | |
1781 | ||
1782 | dout("init\n"); | |
1783 | osdc->client = client; | |
1784 | osdc->osdmap = NULL; | |
1785 | init_rwsem(&osdc->map_sem); | |
1786 | init_completion(&osdc->map_waiters); | |
1787 | osdc->last_requested_map = 0; | |
1788 | mutex_init(&osdc->request_mutex); | |
f24e9980 SW |
1789 | osdc->last_tid = 0; |
1790 | osdc->osds = RB_ROOT; | |
f5a2041b | 1791 | INIT_LIST_HEAD(&osdc->osd_lru); |
f24e9980 | 1792 | osdc->requests = RB_ROOT; |
422d2cb8 | 1793 | INIT_LIST_HEAD(&osdc->req_lru); |
6f6c7006 SW |
1794 | INIT_LIST_HEAD(&osdc->req_unsent); |
1795 | INIT_LIST_HEAD(&osdc->req_notarget); | |
a40c4f10 | 1796 | INIT_LIST_HEAD(&osdc->req_linger); |
f24e9980 SW |
1797 | osdc->num_requests = 0; |
1798 | INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); | |
f5a2041b | 1799 | INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); |
a40c4f10 YS |
1800 | spin_lock_init(&osdc->event_lock); |
1801 | osdc->event_tree = RB_ROOT; | |
1802 | osdc->event_count = 0; | |
f5a2041b YS |
1803 | |
1804 | schedule_delayed_work(&osdc->osds_timeout_work, | |
3d14c5d2 | 1805 | round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ)); |
f24e9980 | 1806 | |
5f44f142 | 1807 | err = -ENOMEM; |
f24e9980 SW |
1808 | osdc->req_mempool = mempool_create_kmalloc_pool(10, |
1809 | sizeof(struct ceph_osd_request)); | |
1810 | if (!osdc->req_mempool) | |
5f44f142 | 1811 | goto out; |
f24e9980 | 1812 | |
d50b409f SW |
1813 | err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, |
1814 | OSD_OP_FRONT_LEN, 10, true, | |
4f48280e | 1815 | "osd_op"); |
f24e9980 | 1816 | if (err < 0) |
5f44f142 | 1817 | goto out_mempool; |
d50b409f | 1818 | err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, |
4f48280e SW |
1819 | OSD_OPREPLY_FRONT_LEN, 10, true, |
1820 | "osd_op_reply"); | |
c16e7869 SW |
1821 | if (err < 0) |
1822 | goto out_msgpool; | |
a40c4f10 YS |
1823 | |
1824 | osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); | |
1825 | if (IS_ERR(osdc->notify_wq)) { | |
1826 | err = PTR_ERR(osdc->notify_wq); | |
1827 | osdc->notify_wq = NULL; | |
1828 | goto out_msgpool; | |
1829 | } | |
f24e9980 | 1830 | return 0; |
5f44f142 | 1831 | |
c16e7869 SW |
1832 | out_msgpool: |
1833 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
5f44f142 SW |
1834 | out_mempool: |
1835 | mempool_destroy(osdc->req_mempool); | |
1836 | out: | |
1837 | return err; | |
f24e9980 | 1838 | } |
3d14c5d2 | 1839 | EXPORT_SYMBOL(ceph_osdc_init); |
f24e9980 SW |
1840 | |
1841 | void ceph_osdc_stop(struct ceph_osd_client *osdc) | |
1842 | { | |
a40c4f10 YS |
1843 | flush_workqueue(osdc->notify_wq); |
1844 | destroy_workqueue(osdc->notify_wq); | |
f24e9980 | 1845 | cancel_delayed_work_sync(&osdc->timeout_work); |
f5a2041b | 1846 | cancel_delayed_work_sync(&osdc->osds_timeout_work); |
f24e9980 SW |
1847 | if (osdc->osdmap) { |
1848 | ceph_osdmap_destroy(osdc->osdmap); | |
1849 | osdc->osdmap = NULL; | |
1850 | } | |
aca420bc | 1851 | remove_all_osds(osdc); |
f24e9980 SW |
1852 | mempool_destroy(osdc->req_mempool); |
1853 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
c16e7869 | 1854 | ceph_msgpool_destroy(&osdc->msgpool_op_reply); |
f24e9980 | 1855 | } |
3d14c5d2 | 1856 | EXPORT_SYMBOL(ceph_osdc_stop); |
f24e9980 SW |
1857 | |
1858 | /* | |
1859 | * Read some contiguous pages. If we cross a stripe boundary, shorten | |
1860 | * *plen. Return number of bytes read, or error. | |
1861 | */ | |
1862 | int ceph_osdc_readpages(struct ceph_osd_client *osdc, | |
1863 | struct ceph_vino vino, struct ceph_file_layout *layout, | |
1864 | u64 off, u64 *plen, | |
1865 | u32 truncate_seq, u64 truncate_size, | |
b7495fc2 | 1866 | struct page **pages, int num_pages, int page_align) |
f24e9980 SW |
1867 | { |
1868 | struct ceph_osd_request *req; | |
1869 | int rc = 0; | |
1870 | ||
1871 | dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, | |
1872 | vino.snap, off, *plen); | |
1873 | req = ceph_osdc_new_request(osdc, layout, vino, off, plen, | |
1874 | CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, | |
1875 | NULL, 0, truncate_seq, truncate_size, NULL, | |
b7495fc2 | 1876 | false, 1, page_align); |
6816282d SW |
1877 | if (IS_ERR(req)) |
1878 | return PTR_ERR(req); | |
f24e9980 SW |
1879 | |
1880 | /* it may be a short read due to an object boundary */ | |
1881 | req->r_pages = pages; | |
f24e9980 | 1882 | |
b7495fc2 SW |
1883 | dout("readpages final extent is %llu~%llu (%d pages align %d)\n", |
1884 | off, *plen, req->r_num_pages, page_align); | |
f24e9980 SW |
1885 | |
1886 | rc = ceph_osdc_start_request(osdc, req, false); | |
1887 | if (!rc) | |
1888 | rc = ceph_osdc_wait_request(osdc, req); | |
1889 | ||
1890 | ceph_osdc_put_request(req); | |
1891 | dout("readpages result %d\n", rc); | |
1892 | return rc; | |
1893 | } | |
3d14c5d2 | 1894 | EXPORT_SYMBOL(ceph_osdc_readpages); |
f24e9980 SW |
1895 | |
1896 | /* | |
1897 | * do a synchronous write on N pages | |
1898 | */ | |
1899 | int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, | |
1900 | struct ceph_file_layout *layout, | |
1901 | struct ceph_snap_context *snapc, | |
1902 | u64 off, u64 len, | |
1903 | u32 truncate_seq, u64 truncate_size, | |
1904 | struct timespec *mtime, | |
1905 | struct page **pages, int num_pages, | |
1906 | int flags, int do_sync, bool nofail) | |
1907 | { | |
1908 | struct ceph_osd_request *req; | |
1909 | int rc = 0; | |
b7495fc2 | 1910 | int page_align = off & ~PAGE_MASK; |
f24e9980 SW |
1911 | |
1912 | BUG_ON(vino.snap != CEPH_NOSNAP); | |
1913 | req = ceph_osdc_new_request(osdc, layout, vino, off, &len, | |
1914 | CEPH_OSD_OP_WRITE, | |
1915 | flags | CEPH_OSD_FLAG_ONDISK | | |
1916 | CEPH_OSD_FLAG_WRITE, | |
1917 | snapc, do_sync, | |
1918 | truncate_seq, truncate_size, mtime, | |
b7495fc2 | 1919 | nofail, 1, page_align); |
6816282d SW |
1920 | if (IS_ERR(req)) |
1921 | return PTR_ERR(req); | |
f24e9980 SW |
1922 | |
1923 | /* it may be a short write due to an object boundary */ | |
1924 | req->r_pages = pages; | |
f24e9980 SW |
1925 | dout("writepages %llu~%llu (%d pages)\n", off, len, |
1926 | req->r_num_pages); | |
1927 | ||
1928 | rc = ceph_osdc_start_request(osdc, req, nofail); | |
1929 | if (!rc) | |
1930 | rc = ceph_osdc_wait_request(osdc, req); | |
1931 | ||
1932 | ceph_osdc_put_request(req); | |
1933 | if (rc == 0) | |
1934 | rc = len; | |
1935 | dout("writepages result %d\n", rc); | |
1936 | return rc; | |
1937 | } | |
3d14c5d2 | 1938 | EXPORT_SYMBOL(ceph_osdc_writepages); |
f24e9980 SW |
1939 | |
1940 | /* | |
1941 | * handle incoming message | |
1942 | */ | |
1943 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
1944 | { | |
1945 | struct ceph_osd *osd = con->private; | |
32c895e7 | 1946 | struct ceph_osd_client *osdc; |
f24e9980 SW |
1947 | int type = le16_to_cpu(msg->hdr.type); |
1948 | ||
1949 | if (!osd) | |
4a32f93d | 1950 | goto out; |
32c895e7 | 1951 | osdc = osd->o_osdc; |
f24e9980 SW |
1952 | |
1953 | switch (type) { | |
1954 | case CEPH_MSG_OSD_MAP: | |
1955 | ceph_osdc_handle_map(osdc, msg); | |
1956 | break; | |
1957 | case CEPH_MSG_OSD_OPREPLY: | |
350b1c32 | 1958 | handle_reply(osdc, msg, con); |
f24e9980 | 1959 | break; |
a40c4f10 YS |
1960 | case CEPH_MSG_WATCH_NOTIFY: |
1961 | handle_watch_notify(osdc, msg); | |
1962 | break; | |
f24e9980 SW |
1963 | |
1964 | default: | |
1965 | pr_err("received unknown message type %d %s\n", type, | |
1966 | ceph_msg_type_name(type)); | |
1967 | } | |
4a32f93d | 1968 | out: |
f24e9980 SW |
1969 | ceph_msg_put(msg); |
1970 | } | |
1971 | ||
5b3a4db3 | 1972 | /* |
21b667f6 SW |
1973 | * lookup and return message for incoming reply. set up reply message |
1974 | * pages. | |
5b3a4db3 SW |
1975 | */ |
1976 | static struct ceph_msg *get_reply(struct ceph_connection *con, | |
2450418c YS |
1977 | struct ceph_msg_header *hdr, |
1978 | int *skip) | |
f24e9980 SW |
1979 | { |
1980 | struct ceph_osd *osd = con->private; | |
1981 | struct ceph_osd_client *osdc = osd->o_osdc; | |
2450418c | 1982 | struct ceph_msg *m; |
0547a9b3 | 1983 | struct ceph_osd_request *req; |
5b3a4db3 SW |
1984 | int front = le32_to_cpu(hdr->front_len); |
1985 | int data_len = le32_to_cpu(hdr->data_len); | |
0547a9b3 | 1986 | u64 tid; |
f24e9980 | 1987 | |
0547a9b3 YS |
1988 | tid = le64_to_cpu(hdr->tid); |
1989 | mutex_lock(&osdc->request_mutex); | |
1990 | req = __lookup_request(osdc, tid); | |
1991 | if (!req) { | |
1992 | *skip = 1; | |
1993 | m = NULL; | |
756a16a5 SW |
1994 | dout("get_reply unknown tid %llu from osd%d\n", tid, |
1995 | osd->o_osd); | |
0547a9b3 YS |
1996 | goto out; |
1997 | } | |
c16e7869 SW |
1998 | |
1999 | if (req->r_con_filling_msg) { | |
8921d114 | 2000 | dout("%s revoking msg %p from old con %p\n", __func__, |
c16e7869 | 2001 | req->r_reply, req->r_con_filling_msg); |
8921d114 | 2002 | ceph_msg_revoke_incoming(req->r_reply); |
0d47766f | 2003 | req->r_con_filling_msg->ops->put(req->r_con_filling_msg); |
6f46cb29 | 2004 | req->r_con_filling_msg = NULL; |
0547a9b3 YS |
2005 | } |
2006 | ||
c16e7869 SW |
2007 | if (front > req->r_reply->front.iov_len) { |
2008 | pr_warning("get_reply front %d > preallocated %d\n", | |
2009 | front, (int)req->r_reply->front.iov_len); | |
b61c2763 | 2010 | m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS, false); |
a79832f2 | 2011 | if (!m) |
c16e7869 SW |
2012 | goto out; |
2013 | ceph_msg_put(req->r_reply); | |
2014 | req->r_reply = m; | |
2015 | } | |
2016 | m = ceph_msg_get(req->r_reply); | |
2017 | ||
0547a9b3 | 2018 | if (data_len > 0) { |
b7495fc2 | 2019 | int want = calc_pages_for(req->r_page_alignment, data_len); |
21b667f6 SW |
2020 | |
2021 | if (unlikely(req->r_num_pages < want)) { | |
9bb0ce2b SW |
2022 | pr_warning("tid %lld reply has %d bytes %d pages, we" |
2023 | " had only %d pages ready\n", tid, data_len, | |
2024 | want, req->r_num_pages); | |
0547a9b3 YS |
2025 | *skip = 1; |
2026 | ceph_msg_put(m); | |
a79832f2 | 2027 | m = NULL; |
21b667f6 | 2028 | goto out; |
0547a9b3 | 2029 | } |
21b667f6 SW |
2030 | m->pages = req->r_pages; |
2031 | m->nr_pages = req->r_num_pages; | |
c5c6b19d | 2032 | m->page_alignment = req->r_page_alignment; |
68b4476b YS |
2033 | #ifdef CONFIG_BLOCK |
2034 | m->bio = req->r_bio; | |
2035 | #endif | |
0547a9b3 | 2036 | } |
5b3a4db3 | 2037 | *skip = 0; |
0d47766f | 2038 | req->r_con_filling_msg = con->ops->get(con); |
c16e7869 | 2039 | dout("get_reply tid %lld %p\n", tid, m); |
0547a9b3 YS |
2040 | |
2041 | out: | |
2042 | mutex_unlock(&osdc->request_mutex); | |
2450418c | 2043 | return m; |
5b3a4db3 SW |
2044 | |
2045 | } | |
2046 | ||
2047 | static struct ceph_msg *alloc_msg(struct ceph_connection *con, | |
2048 | struct ceph_msg_header *hdr, | |
2049 | int *skip) | |
2050 | { | |
2051 | struct ceph_osd *osd = con->private; | |
2052 | int type = le16_to_cpu(hdr->type); | |
2053 | int front = le32_to_cpu(hdr->front_len); | |
2054 | ||
1c20f2d2 | 2055 | *skip = 0; |
5b3a4db3 SW |
2056 | switch (type) { |
2057 | case CEPH_MSG_OSD_MAP: | |
a40c4f10 | 2058 | case CEPH_MSG_WATCH_NOTIFY: |
b61c2763 | 2059 | return ceph_msg_new(type, front, GFP_NOFS, false); |
5b3a4db3 SW |
2060 | case CEPH_MSG_OSD_OPREPLY: |
2061 | return get_reply(con, hdr, skip); | |
2062 | default: | |
2063 | pr_info("alloc_msg unexpected msg type %d from osd%d\n", type, | |
2064 | osd->o_osd); | |
2065 | *skip = 1; | |
2066 | return NULL; | |
2067 | } | |
f24e9980 SW |
2068 | } |
2069 | ||
2070 | /* | |
2071 | * Wrappers to refcount containing ceph_osd struct | |
2072 | */ | |
2073 | static struct ceph_connection *get_osd_con(struct ceph_connection *con) | |
2074 | { | |
2075 | struct ceph_osd *osd = con->private; | |
2076 | if (get_osd(osd)) | |
2077 | return con; | |
2078 | return NULL; | |
2079 | } | |
2080 | ||
2081 | static void put_osd_con(struct ceph_connection *con) | |
2082 | { | |
2083 | struct ceph_osd *osd = con->private; | |
2084 | put_osd(osd); | |
2085 | } | |
2086 | ||
4e7a5dcd SW |
2087 | /* |
2088 | * authentication | |
2089 | */ | |
a3530df3 AE |
2090 | /* |
2091 | * Note: returned pointer is the address of a structure that's | |
2092 | * managed separately. Caller must *not* attempt to free it. | |
2093 | */ | |
2094 | static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, | |
8f43fb53 | 2095 | int *proto, int force_new) |
4e7a5dcd SW |
2096 | { |
2097 | struct ceph_osd *o = con->private; | |
2098 | struct ceph_osd_client *osdc = o->o_osdc; | |
2099 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
74f1869f | 2100 | struct ceph_auth_handshake *auth = &o->o_auth; |
4e7a5dcd | 2101 | |
74f1869f | 2102 | if (force_new && auth->authorizer) { |
a255651d AE |
2103 | if (ac->ops && ac->ops->destroy_authorizer) |
2104 | ac->ops->destroy_authorizer(ac, auth->authorizer); | |
74f1869f AE |
2105 | auth->authorizer = NULL; |
2106 | } | |
a255651d | 2107 | if (!auth->authorizer && ac->ops && ac->ops->create_authorizer) { |
a3530df3 AE |
2108 | int ret = ac->ops->create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, |
2109 | auth); | |
4e7a5dcd | 2110 | if (ret) |
a3530df3 | 2111 | return ERR_PTR(ret); |
4e7a5dcd | 2112 | } |
4e7a5dcd | 2113 | *proto = ac->protocol; |
74f1869f | 2114 | |
a3530df3 | 2115 | return auth; |
4e7a5dcd SW |
2116 | } |
2117 | ||
2118 | ||
2119 | static int verify_authorizer_reply(struct ceph_connection *con, int len) | |
2120 | { | |
2121 | struct ceph_osd *o = con->private; | |
2122 | struct ceph_osd_client *osdc = o->o_osdc; | |
2123 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
2124 | ||
a255651d AE |
2125 | /* |
2126 | * XXX If ac->ops or ac->ops->verify_authorizer_reply is null, | |
2127 | * XXX which do we do: succeed or fail? | |
2128 | */ | |
6c4a1915 | 2129 | return ac->ops->verify_authorizer_reply(ac, o->o_auth.authorizer, len); |
4e7a5dcd SW |
2130 | } |
2131 | ||
9bd2e6f8 SW |
2132 | static int invalidate_authorizer(struct ceph_connection *con) |
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 | ||
a255651d | 2138 | if (ac->ops && ac->ops->invalidate_authorizer) |
9bd2e6f8 SW |
2139 | ac->ops->invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); |
2140 | ||
2141 | return ceph_monc_validate_auth(&osdc->client->monc); | |
2142 | } | |
4e7a5dcd | 2143 | |
9e32789f | 2144 | static const struct ceph_connection_operations osd_con_ops = { |
f24e9980 SW |
2145 | .get = get_osd_con, |
2146 | .put = put_osd_con, | |
2147 | .dispatch = dispatch, | |
4e7a5dcd SW |
2148 | .get_authorizer = get_authorizer, |
2149 | .verify_authorizer_reply = verify_authorizer_reply, | |
9bd2e6f8 | 2150 | .invalidate_authorizer = invalidate_authorizer, |
f24e9980 | 2151 | .alloc_msg = alloc_msg, |
81b024e7 | 2152 | .fault = osd_reset, |
f24e9980 | 2153 | }; |