1 /*
2 * GPL HEADER START
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 * GPL HEADER END
25 */
26 /*
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 *
30 * Copyright (c) 2011, 2012, Intel Corporation.
31 */
32 /*
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
35 */
36
37 #define DEBUG_SUBSYSTEM S_MDC
38
39 # include <linux/module.h>
40 # include <linux/kernel.h>
41
42 #include "../include/obd_class.h"
43 #include "mdc_internal.h"
44 #include "../include/lustre_fid.h"
45
46 /* mdc_setattr does its own semaphore handling */
mdc_reint(struct ptlrpc_request * request,struct mdc_rpc_lock * rpc_lock,int level)47 static int mdc_reint(struct ptlrpc_request *request,
48 struct mdc_rpc_lock *rpc_lock,
49 int level)
50 {
51 int rc;
52
53 request->rq_send_state = level;
54
55 mdc_get_rpc_lock(rpc_lock, NULL);
56 rc = ptlrpc_queue_wait(request);
57 mdc_put_rpc_lock(rpc_lock, NULL);
58 if (rc)
59 CDEBUG(D_INFO, "error in handling %d\n", rc);
60 else if (!req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY))
61 rc = -EPROTO;
62
63 return rc;
64 }
65
66 /* Find and cancel locally locks matched by inode @bits & @mode in the resource
67 * found by @fid. Found locks are added into @cancel list. Returns the amount of
68 * locks added to @cancels list. */
mdc_resource_get_unused(struct obd_export * exp,const struct lu_fid * fid,struct list_head * cancels,ldlm_mode_t mode,__u64 bits)69 int mdc_resource_get_unused(struct obd_export *exp, const struct lu_fid *fid,
70 struct list_head *cancels, ldlm_mode_t mode,
71 __u64 bits)
72 {
73 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
74 ldlm_policy_data_t policy = {};
75 struct ldlm_res_id res_id;
76 struct ldlm_resource *res;
77 int count;
78
79 /* Return, i.e. cancel nothing, only if ELC is supported (flag in
80 * export) but disabled through procfs (flag in NS).
81 *
82 * This distinguishes from a case when ELC is not supported originally,
83 * when we still want to cancel locks in advance and just cancel them
84 * locally, without sending any RPC. */
85 if (exp_connect_cancelset(exp) && !ns_connect_cancelset(ns))
86 return 0;
87
88 fid_build_reg_res_name(fid, &res_id);
89 res = ldlm_resource_get(exp->exp_obd->obd_namespace,
90 NULL, &res_id, 0, 0);
91 if (res == NULL)
92 return 0;
93 LDLM_RESOURCE_ADDREF(res);
94 /* Initialize ibits lock policy. */
95 policy.l_inodebits.bits = bits;
96 count = ldlm_cancel_resource_local(res, cancels, &policy,
97 mode, 0, 0, NULL);
98 LDLM_RESOURCE_DELREF(res);
99 ldlm_resource_putref(res);
100 return count;
101 }
102
mdc_setattr(struct obd_export * exp,struct md_op_data * op_data,void * ea,int ealen,void * ea2,int ea2len,struct ptlrpc_request ** request,struct md_open_data ** mod)103 int mdc_setattr(struct obd_export *exp, struct md_op_data *op_data,
104 void *ea, int ealen, void *ea2, int ea2len,
105 struct ptlrpc_request **request, struct md_open_data **mod)
106 {
107 LIST_HEAD(cancels);
108 struct ptlrpc_request *req;
109 struct mdc_rpc_lock *rpc_lock;
110 struct obd_device *obd = exp->exp_obd;
111 int count = 0, rc;
112 __u64 bits;
113
114 LASSERT(op_data != NULL);
115
116 bits = MDS_INODELOCK_UPDATE;
117 if (op_data->op_attr.ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID))
118 bits |= MDS_INODELOCK_LOOKUP;
119 if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
120 (fid_is_sane(&op_data->op_fid1)) &&
121 !OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK_NET))
122 count = mdc_resource_get_unused(exp, &op_data->op_fid1,
123 &cancels, LCK_EX, bits);
124 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
125 &RQF_MDS_REINT_SETATTR);
126 if (req == NULL) {
127 ldlm_lock_list_put(&cancels, l_bl_ast, count);
128 return -ENOMEM;
129 }
130 mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
131 if ((op_data->op_flags & (MF_SOM_CHANGE | MF_EPOCH_OPEN)) == 0)
132 req_capsule_set_size(&req->rq_pill, &RMF_MDT_EPOCH, RCL_CLIENT,
133 0);
134 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT, ealen);
135 req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_CLIENT,
136 ea2len);
137
138 rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
139 if (rc) {
140 ptlrpc_request_free(req);
141 return rc;
142 }
143
144 rpc_lock = obd->u.cli.cl_rpc_lock;
145
146 if (op_data->op_attr.ia_valid & (ATTR_MTIME | ATTR_CTIME))
147 CDEBUG(D_INODE, "setting mtime "CFS_TIME_T
148 ", ctime "CFS_TIME_T"\n",
149 LTIME_S(op_data->op_attr.ia_mtime),
150 LTIME_S(op_data->op_attr.ia_ctime));
151 mdc_setattr_pack(req, op_data, ea, ealen, ea2, ea2len);
152
153 ptlrpc_request_set_replen(req);
154 if (mod && (op_data->op_flags & MF_EPOCH_OPEN) &&
155 req->rq_import->imp_replayable) {
156 LASSERT(*mod == NULL);
157
158 *mod = obd_mod_alloc();
159 if (*mod == NULL) {
160 DEBUG_REQ(D_ERROR, req, "Can't allocate md_open_data");
161 } else {
162 req->rq_replay = 1;
163 req->rq_cb_data = *mod;
164 (*mod)->mod_open_req = req;
165 req->rq_commit_cb = mdc_commit_open;
166 (*mod)->mod_is_create = true;
167 /**
168 * Take an extra reference on \var mod, it protects \var
169 * mod from being freed on eviction (commit callback is
170 * called despite rq_replay flag).
171 * Will be put on mdc_done_writing().
172 */
173 obd_mod_get(*mod);
174 }
175 }
176
177 rc = mdc_reint(req, rpc_lock, LUSTRE_IMP_FULL);
178
179 /* Save the obtained info in the original RPC for the replay case. */
180 if (rc == 0 && (op_data->op_flags & MF_EPOCH_OPEN)) {
181 struct mdt_ioepoch *epoch;
182 struct mdt_body *body;
183
184 epoch = req_capsule_client_get(&req->rq_pill, &RMF_MDT_EPOCH);
185 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
186 LASSERT(epoch != NULL);
187 LASSERT(body != NULL);
188 epoch->handle = body->handle;
189 epoch->ioepoch = body->ioepoch;
190 req->rq_replay_cb = mdc_replay_open;
191 /** bug 3633, open may be committed and estale answer is not error */
192 } else if (rc == -ESTALE && (op_data->op_flags & MF_SOM_CHANGE)) {
193 rc = 0;
194 } else if (rc == -ERESTARTSYS) {
195 rc = 0;
196 }
197 *request = req;
198 if (rc && req->rq_commit_cb) {
199 /* Put an extra reference on \var mod on error case. */
200 if (mod != NULL && *mod != NULL)
201 obd_mod_put(*mod);
202 req->rq_commit_cb(req);
203 }
204 return rc;
205 }
206
mdc_create(struct obd_export * exp,struct md_op_data * op_data,const void * data,int datalen,int mode,__u32 uid,__u32 gid,cfs_cap_t cap_effective,__u64 rdev,struct ptlrpc_request ** request)207 int mdc_create(struct obd_export *exp, struct md_op_data *op_data,
208 const void *data, int datalen, int mode, __u32 uid, __u32 gid,
209 cfs_cap_t cap_effective, __u64 rdev,
210 struct ptlrpc_request **request)
211 {
212 struct ptlrpc_request *req;
213 int level, rc;
214 int count, resends = 0;
215 struct obd_import *import = exp->exp_obd->u.cli.cl_import;
216 int generation = import->imp_generation;
217 LIST_HEAD(cancels);
218
219 /* For case if upper layer did not alloc fid, do it now. */
220 if (!fid_is_sane(&op_data->op_fid2)) {
221 /*
222 * mdc_fid_alloc() may return errno 1 in case of switch to new
223 * sequence, handle this.
224 */
225 rc = mdc_fid_alloc(exp, &op_data->op_fid2, op_data);
226 if (rc < 0) {
227 CERROR("Can't alloc new fid, rc %d\n", rc);
228 return rc;
229 }
230 }
231
232 rebuild:
233 count = 0;
234 if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
235 (fid_is_sane(&op_data->op_fid1)))
236 count = mdc_resource_get_unused(exp, &op_data->op_fid1,
237 &cancels, LCK_EX,
238 MDS_INODELOCK_UPDATE);
239
240 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
241 &RQF_MDS_REINT_CREATE_RMT_ACL);
242 if (req == NULL) {
243 ldlm_lock_list_put(&cancels, l_bl_ast, count);
244 return -ENOMEM;
245 }
246 mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
247 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
248 op_data->op_namelen + 1);
249 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
250 data && datalen ? datalen : 0);
251
252 rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
253 if (rc) {
254 ptlrpc_request_free(req);
255 return rc;
256 }
257
258 /*
259 * mdc_create_pack() fills msg->bufs[1] with name and msg->bufs[2] with
260 * tgt, for symlinks or lov MD data.
261 */
262 mdc_create_pack(req, op_data, data, datalen, mode, uid,
263 gid, cap_effective, rdev);
264
265 ptlrpc_request_set_replen(req);
266
267 /* ask ptlrpc not to resend on EINPROGRESS since we have our own retry
268 * logic here */
269 req->rq_no_retry_einprogress = 1;
270
271 if (resends) {
272 req->rq_generation_set = 1;
273 req->rq_import_generation = generation;
274 req->rq_sent = get_seconds() + resends;
275 }
276 level = LUSTRE_IMP_FULL;
277 resend:
278 rc = mdc_reint(req, exp->exp_obd->u.cli.cl_rpc_lock, level);
279
280 /* Resend if we were told to. */
281 if (rc == -ERESTARTSYS) {
282 level = LUSTRE_IMP_RECOVER;
283 goto resend;
284 } else if (rc == -EINPROGRESS) {
285 /* Retry create infinitely until succeed or get other
286 * error code. */
287 ptlrpc_req_finished(req);
288 resends++;
289
290 CDEBUG(D_HA, "%s: resend:%d create on "DFID"/"DFID"\n",
291 exp->exp_obd->obd_name, resends,
292 PFID(&op_data->op_fid1), PFID(&op_data->op_fid2));
293
294 if (generation == import->imp_generation) {
295 goto rebuild;
296 } else {
297 CDEBUG(D_HA, "resend cross eviction\n");
298 return -EIO;
299 }
300 } else if (rc == 0) {
301 struct mdt_body *body;
302 struct lustre_capa *capa;
303
304 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
305 LASSERT(body);
306 if (body->valid & OBD_MD_FLMDSCAPA) {
307 capa = req_capsule_server_get(&req->rq_pill,
308 &RMF_CAPA1);
309 if (capa == NULL)
310 rc = -EPROTO;
311 }
312 }
313
314 *request = req;
315 return rc;
316 }
317
mdc_unlink(struct obd_export * exp,struct md_op_data * op_data,struct ptlrpc_request ** request)318 int mdc_unlink(struct obd_export *exp, struct md_op_data *op_data,
319 struct ptlrpc_request **request)
320 {
321 LIST_HEAD(cancels);
322 struct obd_device *obd = class_exp2obd(exp);
323 struct ptlrpc_request *req = *request;
324 int count = 0, rc;
325
326 LASSERT(req == NULL);
327
328 if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
329 (fid_is_sane(&op_data->op_fid1)) &&
330 !OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK_NET))
331 count = mdc_resource_get_unused(exp, &op_data->op_fid1,
332 &cancels, LCK_EX,
333 MDS_INODELOCK_UPDATE);
334 if ((op_data->op_flags & MF_MDC_CANCEL_FID3) &&
335 (fid_is_sane(&op_data->op_fid3)) &&
336 !OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK_NET))
337 count += mdc_resource_get_unused(exp, &op_data->op_fid3,
338 &cancels, LCK_EX,
339 MDS_INODELOCK_FULL);
340 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
341 &RQF_MDS_REINT_UNLINK);
342 if (req == NULL) {
343 ldlm_lock_list_put(&cancels, l_bl_ast, count);
344 return -ENOMEM;
345 }
346 mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
347 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
348 op_data->op_namelen + 1);
349
350 rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
351 if (rc) {
352 ptlrpc_request_free(req);
353 return rc;
354 }
355
356 mdc_unlink_pack(req, op_data);
357
358 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
359 obd->u.cli.cl_default_mds_easize);
360 req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_SERVER,
361 obd->u.cli.cl_default_mds_cookiesize);
362 ptlrpc_request_set_replen(req);
363
364 *request = req;
365
366 rc = mdc_reint(req, obd->u.cli.cl_rpc_lock, LUSTRE_IMP_FULL);
367 if (rc == -ERESTARTSYS)
368 rc = 0;
369 return rc;
370 }
371
mdc_link(struct obd_export * exp,struct md_op_data * op_data,struct ptlrpc_request ** request)372 int mdc_link(struct obd_export *exp, struct md_op_data *op_data,
373 struct ptlrpc_request **request)
374 {
375 LIST_HEAD(cancels);
376 struct obd_device *obd = exp->exp_obd;
377 struct ptlrpc_request *req;
378 int count = 0, rc;
379
380 if ((op_data->op_flags & MF_MDC_CANCEL_FID2) &&
381 (fid_is_sane(&op_data->op_fid2)))
382 count = mdc_resource_get_unused(exp, &op_data->op_fid2,
383 &cancels, LCK_EX,
384 MDS_INODELOCK_UPDATE);
385 if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
386 (fid_is_sane(&op_data->op_fid1)))
387 count += mdc_resource_get_unused(exp, &op_data->op_fid1,
388 &cancels, LCK_EX,
389 MDS_INODELOCK_UPDATE);
390
391 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_REINT_LINK);
392 if (req == NULL) {
393 ldlm_lock_list_put(&cancels, l_bl_ast, count);
394 return -ENOMEM;
395 }
396 mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
397 mdc_set_capa_size(req, &RMF_CAPA2, op_data->op_capa2);
398 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
399 op_data->op_namelen + 1);
400
401 rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
402 if (rc) {
403 ptlrpc_request_free(req);
404 return rc;
405 }
406
407 mdc_link_pack(req, op_data);
408 ptlrpc_request_set_replen(req);
409
410 rc = mdc_reint(req, obd->u.cli.cl_rpc_lock, LUSTRE_IMP_FULL);
411 *request = req;
412 if (rc == -ERESTARTSYS)
413 rc = 0;
414
415 return rc;
416 }
417
mdc_rename(struct obd_export * exp,struct md_op_data * op_data,const char * old,int oldlen,const char * new,int newlen,struct ptlrpc_request ** request)418 int mdc_rename(struct obd_export *exp, struct md_op_data *op_data,
419 const char *old, int oldlen, const char *new, int newlen,
420 struct ptlrpc_request **request)
421 {
422 LIST_HEAD(cancels);
423 struct obd_device *obd = exp->exp_obd;
424 struct ptlrpc_request *req;
425 int count = 0, rc;
426
427 if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
428 (fid_is_sane(&op_data->op_fid1)))
429 count = mdc_resource_get_unused(exp, &op_data->op_fid1,
430 &cancels, LCK_EX,
431 MDS_INODELOCK_UPDATE);
432 if ((op_data->op_flags & MF_MDC_CANCEL_FID2) &&
433 (fid_is_sane(&op_data->op_fid2)))
434 count += mdc_resource_get_unused(exp, &op_data->op_fid2,
435 &cancels, LCK_EX,
436 MDS_INODELOCK_UPDATE);
437 if ((op_data->op_flags & MF_MDC_CANCEL_FID3) &&
438 (fid_is_sane(&op_data->op_fid3)))
439 count += mdc_resource_get_unused(exp, &op_data->op_fid3,
440 &cancels, LCK_EX,
441 MDS_INODELOCK_LOOKUP);
442 if ((op_data->op_flags & MF_MDC_CANCEL_FID4) &&
443 (fid_is_sane(&op_data->op_fid4)))
444 count += mdc_resource_get_unused(exp, &op_data->op_fid4,
445 &cancels, LCK_EX,
446 MDS_INODELOCK_FULL);
447
448 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
449 &RQF_MDS_REINT_RENAME);
450 if (req == NULL) {
451 ldlm_lock_list_put(&cancels, l_bl_ast, count);
452 return -ENOMEM;
453 }
454
455 mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
456 mdc_set_capa_size(req, &RMF_CAPA2, op_data->op_capa2);
457 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT, oldlen + 1);
458 req_capsule_set_size(&req->rq_pill, &RMF_SYMTGT, RCL_CLIENT, newlen+1);
459
460 rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
461 if (rc) {
462 ptlrpc_request_free(req);
463 return rc;
464 }
465
466 if (exp_connect_cancelset(exp) && req)
467 ldlm_cli_cancel_list(&cancels, count, req, 0);
468
469 mdc_rename_pack(req, op_data, old, oldlen, new, newlen);
470
471 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
472 obd->u.cli.cl_default_mds_easize);
473 req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_SERVER,
474 obd->u.cli.cl_default_mds_cookiesize);
475 ptlrpc_request_set_replen(req);
476
477 rc = mdc_reint(req, obd->u.cli.cl_rpc_lock, LUSTRE_IMP_FULL);
478 *request = req;
479 if (rc == -ERESTARTSYS)
480 rc = 0;
481
482 return rc;
483 }
484