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[fs/lustre-release.git] / lustre / mdc / mdc_reint.c
1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=8:tabstop=8:
3  *
4  * GPL HEADER START
5  *
6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 only,
10  * as published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * General Public License version 2 for more details (a copy is included
16  * in the LICENSE file that accompanied this code).
17  *
18  * You should have received a copy of the GNU General Public License
19  * version 2 along with this program; If not, see
20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
21  *
22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23  * CA 95054 USA or visit www.sun.com if you need additional information or
24  * have any questions.
25  *
26  * GPL HEADER END
27  */
28 /*
29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
30  * Use is subject to license terms.
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 #ifndef EXPORT_SYMTAB
38 # define EXPORT_SYMTAB
39 #endif
40 #define DEBUG_SUBSYSTEM S_MDC
41
42 #ifdef __KERNEL__
43 #ifndef AUTOCONF_INCLUDED
44 # include <linux/config.h>
45 #endif
46 # include <linux/module.h>
47 # include <linux/kernel.h>
48 #else
49 # include <liblustre.h>
50 #endif
51
52 #include <obd_class.h>
53 #include "mdc_internal.h"
54 #include <lustre_fid.h>
55
56 /* mdc_setattr does its own semaphore handling */
57 static int mdc_reint(struct ptlrpc_request *request,
58                      struct mdc_rpc_lock *rpc_lock,
59                      int level)
60 {
61         int rc;
62
63         request->rq_send_state = level;
64
65         mdc_get_rpc_lock(rpc_lock, NULL);
66         rc = ptlrpc_queue_wait(request);
67         mdc_put_rpc_lock(rpc_lock, NULL);
68         if (rc)
69                 CDEBUG(D_INFO, "error in handling %d\n", rc);
70         else if (!req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY)) {
71                 rc = -EPROTO;
72         }
73         return rc;
74 }
75
76 /* Find and cancel locally locks matched by inode @bits & @mode in the resource
77  * found by @fid. Found locks are added into @cancel list. Returns the amount of
78  * locks added to @cancels list. */
79 int mdc_resource_get_unused(struct obd_export *exp, struct lu_fid *fid,
80                             struct list_head *cancels, ldlm_mode_t mode,
81                             __u64 bits)
82 {
83         ldlm_policy_data_t policy = {{0}};
84         struct ldlm_res_id res_id;
85         struct ldlm_resource *res;
86         int count;
87         ENTRY;
88
89         fid_build_reg_res_name(fid, &res_id);
90         res = ldlm_resource_get(exp->exp_obd->obd_namespace,
91                                 NULL, &res_id, 0, 0);
92         if (res == NULL)
93                 RETURN(0);
94         LDLM_RESOURCE_ADDREF(res);
95         /* Initialize ibits lock policy. */
96         policy.l_inodebits.bits = bits;
97         count = ldlm_cancel_resource_local(res, cancels, &policy,
98                                            mode, 0, 0, NULL);
99         LDLM_RESOURCE_DELREF(res);
100         ldlm_resource_putref(res);
101         RETURN(count);
102 }
103
104 static int mdc_prep_elc_req(struct obd_export *exp, struct ptlrpc_request *req,
105                             struct list_head *cancels, int count)
106 {
107         return ldlm_prep_elc_req(exp, req, LUSTRE_MDS_VERSION, MDS_REINT,
108                                  0, cancels, count);
109 }
110
111 /* If mdc_setattr is called with an 'iattr', then it is a normal RPC that
112  * should take the normal semaphore and go to the normal portal.
113  *
114  * If it is called with iattr->ia_valid & ATTR_FROM_OPEN, then it is a
115  * magic open-path setattr that should take the setattr semaphore and
116  * go to the setattr portal. */
117 int mdc_setattr(struct obd_export *exp, struct md_op_data *op_data,
118                 void *ea, int ealen, void *ea2, int ea2len,
119                 struct ptlrpc_request **request, struct md_open_data **mod)
120 {
121         CFS_LIST_HEAD(cancels);
122         struct ptlrpc_request *req;
123         struct mdc_rpc_lock *rpc_lock;
124         struct obd_device *obd = exp->exp_obd;
125         int count = 0, rc;
126         __u64 bits;
127         ENTRY;
128
129         LASSERT(op_data != NULL);
130
131         bits = MDS_INODELOCK_UPDATE;
132         if (op_data->op_attr.ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID))
133                 bits |= MDS_INODELOCK_LOOKUP;
134         if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
135             (fid_is_sane(&op_data->op_fid1)))
136                 count = mdc_resource_get_unused(exp, &op_data->op_fid1,
137                                                 &cancels, LCK_EX, bits);
138         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
139                                    &RQF_MDS_REINT_SETATTR);
140         if (req == NULL) {
141                 ldlm_lock_list_put(&cancels, l_bl_ast, count);
142                 RETURN(-ENOMEM);
143         }
144         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
145         if ((op_data->op_flags & (MF_SOM_CHANGE | MF_EPOCH_OPEN)) == 0)
146                 req_capsule_set_size(&req->rq_pill, &RMF_MDT_EPOCH, RCL_CLIENT,
147                                      0);
148         req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT, ealen);
149         req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_CLIENT,
150                              ea2len);
151
152         rc = mdc_prep_elc_req(exp, req, &cancels, count);
153         if (rc) {
154                 ptlrpc_request_free(req);
155                 RETURN(rc);
156         }
157
158         if (op_data->op_attr.ia_valid & ATTR_FROM_OPEN) {
159                 req->rq_request_portal = MDS_SETATTR_PORTAL;
160                 ptlrpc_at_set_req_timeout(req);
161                 rpc_lock = obd->u.cli.cl_setattr_lock;
162         } else {
163                 rpc_lock = obd->u.cli.cl_rpc_lock;
164         }
165
166         if (op_data->op_attr.ia_valid & (ATTR_MTIME | ATTR_CTIME))
167                 CDEBUG(D_INODE, "setting mtime "CFS_TIME_T
168                        ", ctime "CFS_TIME_T"\n",
169                        LTIME_S(op_data->op_attr.ia_mtime),
170                        LTIME_S(op_data->op_attr.ia_ctime));
171         mdc_setattr_pack(req, op_data, ea, ealen, ea2, ea2len);
172
173         ptlrpc_request_set_replen(req);
174         if (mod && (op_data->op_flags & MF_EPOCH_OPEN) &&
175             req->rq_import->imp_replayable)
176         {
177                 LASSERT(*mod == NULL);
178
179                 OBD_ALLOC_PTR(*mod);
180                 if (*mod == NULL) {
181                         DEBUG_REQ(D_ERROR, req, "Can't allocate "
182                                   "md_open_data");
183                 } else {
184                         CFS_INIT_LIST_HEAD(&(*mod)->mod_replay_list);
185                 }
186         }
187         if (mod && *mod) {
188                 req->rq_cb_data = *mod;
189                 req->rq_commit_cb = mdc_commit_delayed;
190                 list_add_tail(&req->rq_mod_list, &(*mod)->mod_replay_list);
191                 /* This is not the last request in sequence for truncate. */
192                 if (op_data->op_flags & MF_EPOCH_OPEN)
193                         req->rq_replay = 1;
194                 else
195                         req->rq_sequence = 1;
196         }
197
198         rc = mdc_reint(req, rpc_lock, LUSTRE_IMP_FULL);
199         *request = req;
200         if (rc == -ERESTARTSYS)
201                 rc = 0;
202         if (rc && req->rq_commit_cb)
203                 req->rq_commit_cb(req);
204         RETURN(rc);
205 }
206
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 = 0;
215         CFS_LIST_HEAD(cancels);
216         ENTRY;
217
218         /* For case if upper layer did not alloc fid, do it now. */
219         if (!fid_is_sane(&op_data->op_fid2)) {
220                 /*
221                  * mdc_fid_alloc() may return errno 1 in case of switch to new
222                  * sequence, handle this.
223                  */
224                 rc = mdc_fid_alloc(exp, &op_data->op_fid2, op_data);
225                 if (rc < 0) {
226                         CERROR("Can't alloc new fid, rc %d\n", rc);
227                         RETURN(rc);
228                 }
229         }
230
231         if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
232             (fid_is_sane(&op_data->op_fid1)))
233                 count = mdc_resource_get_unused(exp, &op_data->op_fid1,
234                                                 &cancels, LCK_EX,
235                                                 MDS_INODELOCK_UPDATE);
236
237         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
238                                    &RQF_MDS_REINT_CREATE_RMT_ACL);
239         if (req == NULL) {
240                 ldlm_lock_list_put(&cancels, l_bl_ast, count);
241                 RETURN(-ENOMEM);
242         }
243         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
244         req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
245                              op_data->op_namelen + 1);
246         req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
247                              data && datalen ? datalen : 0);
248
249         rc = mdc_prep_elc_req(exp, req, &cancels, count);
250         if (rc) {
251                 ptlrpc_request_free(req);
252                 RETURN(rc);
253         }
254
255         /*
256          * mdc_create_pack() fills msg->bufs[1] with name and msg->bufs[2] with
257          * tgt, for symlinks or lov MD data.
258          */
259         mdc_create_pack(req, op_data, data, datalen, mode, uid,
260                         gid, cap_effective, rdev);
261
262         ptlrpc_request_set_replen(req);
263
264         level = LUSTRE_IMP_FULL;
265  resend:
266         rc = mdc_reint(req, exp->exp_obd->u.cli.cl_rpc_lock, level);
267
268         /* Resend if we were told to. */
269         if (rc == -ERESTARTSYS) {
270                 level = LUSTRE_IMP_RECOVER;
271                 goto resend;
272         } else if (rc == 0) {
273                 struct mdt_body *body;
274                 struct lustre_capa *capa;
275
276                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
277                 LASSERT(body);
278                 if (body->valid & OBD_MD_FLMDSCAPA) {
279                         capa = req_capsule_server_get(&req->rq_pill,
280                                                       &RMF_CAPA1);
281                         if (capa == NULL)
282                                 rc = -EPROTO;
283                 }
284         }
285
286         *request = req;
287         RETURN(rc);
288 }
289
290 int mdc_unlink(struct obd_export *exp, struct md_op_data *op_data,
291                struct ptlrpc_request **request)
292 {
293         CFS_LIST_HEAD(cancels);
294         struct obd_device *obd = class_exp2obd(exp);
295         struct ptlrpc_request *req = *request;
296         int count = 0, rc;
297         ENTRY;
298
299         LASSERT(req == NULL);
300
301         if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
302             (fid_is_sane(&op_data->op_fid1)))
303                 count = mdc_resource_get_unused(exp, &op_data->op_fid1,
304                                                 &cancels, LCK_EX,
305                                                 MDS_INODELOCK_UPDATE);
306         if ((op_data->op_flags & MF_MDC_CANCEL_FID3) &&
307             (fid_is_sane(&op_data->op_fid3)))
308                 count += mdc_resource_get_unused(exp, &op_data->op_fid3,
309                                                  &cancels, LCK_EX,
310                                                  MDS_INODELOCK_FULL);
311         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
312                                    &RQF_MDS_REINT_UNLINK);
313         if (req == NULL) {
314                 ldlm_lock_list_put(&cancels, l_bl_ast, count);
315                 RETURN(-ENOMEM);
316         }
317         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
318         req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
319                              op_data->op_namelen + 1);
320
321         rc = mdc_prep_elc_req(exp, req, &cancels, count);
322         if (rc) {
323                 ptlrpc_request_free(req);
324                 RETURN(rc);
325         }
326
327         mdc_unlink_pack(req, op_data);
328
329         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
330                              obd->u.cli.cl_max_mds_easize);
331         req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_SERVER,
332                              obd->u.cli.cl_max_mds_cookiesize);
333         ptlrpc_request_set_replen(req);
334
335         *request = req;
336
337         rc = mdc_reint(req, obd->u.cli.cl_rpc_lock, LUSTRE_IMP_FULL);
338         if (rc == -ERESTARTSYS)
339                 rc = 0;
340         RETURN(rc);
341 }
342
343 int mdc_link(struct obd_export *exp, struct md_op_data *op_data,
344              struct ptlrpc_request **request)
345 {
346         CFS_LIST_HEAD(cancels);
347         struct obd_device *obd = exp->exp_obd;
348         struct ptlrpc_request *req;
349         int count = 0, rc;
350         ENTRY;
351
352         if ((op_data->op_flags & MF_MDC_CANCEL_FID2) &&
353             (fid_is_sane(&op_data->op_fid2)))
354                 count = mdc_resource_get_unused(exp, &op_data->op_fid2,
355                                                 &cancels, LCK_EX,
356                                                 MDS_INODELOCK_UPDATE);
357         if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
358             (fid_is_sane(&op_data->op_fid1)))
359                 count += mdc_resource_get_unused(exp, &op_data->op_fid1,
360                                                  &cancels, LCK_EX,
361                                                  MDS_INODELOCK_UPDATE);
362
363         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_REINT_LINK);
364         if (req == NULL) {
365                 ldlm_lock_list_put(&cancels, l_bl_ast, count);
366                 RETURN(-ENOMEM);
367         }
368         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
369         mdc_set_capa_size(req, &RMF_CAPA2, op_data->op_capa2);
370         req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
371                              op_data->op_namelen + 1);
372
373         rc = mdc_prep_elc_req(exp, req, &cancels, count);
374         if (rc) {
375                 ptlrpc_request_free(req);
376                 RETURN(rc);
377         }
378
379         mdc_link_pack(req, op_data);
380         ptlrpc_request_set_replen(req);
381
382         rc = mdc_reint(req, obd->u.cli.cl_rpc_lock, LUSTRE_IMP_FULL);
383         *request = req;
384         if (rc == -ERESTARTSYS)
385                 rc = 0;
386
387         RETURN(rc);
388 }
389
390 int mdc_rename(struct obd_export *exp, struct md_op_data *op_data,
391                const char *old, int oldlen, const char *new, int newlen,
392                struct ptlrpc_request **request)
393 {
394         CFS_LIST_HEAD(cancels);
395         struct obd_device *obd = exp->exp_obd;
396         struct ptlrpc_request *req;
397         int count = 0, rc;
398         ENTRY;
399
400         if ((op_data->op_flags & MF_MDC_CANCEL_FID1) &&
401             (fid_is_sane(&op_data->op_fid1)))
402                 count = mdc_resource_get_unused(exp, &op_data->op_fid1,
403                                                 &cancels, LCK_EX,
404                                                 MDS_INODELOCK_UPDATE);
405         if ((op_data->op_flags & MF_MDC_CANCEL_FID2) &&
406             (fid_is_sane(&op_data->op_fid2)))
407                 count += mdc_resource_get_unused(exp, &op_data->op_fid2,
408                                                  &cancels, LCK_EX,
409                                                  MDS_INODELOCK_UPDATE);
410         if ((op_data->op_flags & MF_MDC_CANCEL_FID3) &&
411             (fid_is_sane(&op_data->op_fid3)))
412                 count += mdc_resource_get_unused(exp, &op_data->op_fid3,
413                                                  &cancels, LCK_EX,
414                                                  MDS_INODELOCK_LOOKUP);
415         if ((op_data->op_flags & MF_MDC_CANCEL_FID4) &&
416              (fid_is_sane(&op_data->op_fid4)))
417                 count += mdc_resource_get_unused(exp, &op_data->op_fid4,
418                                                  &cancels, LCK_EX,
419                                                  MDS_INODELOCK_FULL);
420
421         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
422                                    &RQF_MDS_REINT_RENAME);
423         if (req == NULL) {
424                 ldlm_lock_list_put(&cancels, l_bl_ast, count);
425                 RETURN(-ENOMEM);
426         }
427
428         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
429         mdc_set_capa_size(req, &RMF_CAPA2, op_data->op_capa2);
430         req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT, oldlen + 1);
431         req_capsule_set_size(&req->rq_pill, &RMF_SYMTGT, RCL_CLIENT, newlen+1);
432
433         rc = mdc_prep_elc_req(exp, req, &cancels, count);
434         if (rc) {
435                 ptlrpc_request_free(req);
436                 RETURN(rc);
437         }
438
439         if (exp_connect_cancelset(exp) && req)
440                 ldlm_cli_cancel_list(&cancels, count, req, 0);
441
442         mdc_rename_pack(req, op_data, old, oldlen, new, newlen);
443
444         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
445                              obd->u.cli.cl_max_mds_easize);
446         req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_SERVER,
447                              obd->u.cli.cl_max_mds_cookiesize);
448         ptlrpc_request_set_replen(req);
449
450         rc = mdc_reint(req, obd->u.cli.cl_rpc_lock, LUSTRE_IMP_FULL);
451         *request = req;
452         if (rc == -ERESTARTSYS)
453                 rc = 0;
454
455         RETURN(rc);
456 }