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Linux/drivers/staging/lustre/lustre/mdc/mdc_request.c

  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) 2001, 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/pagemap.h>
 41 # include <linux/miscdevice.h>
 42 # include <linux/init.h>
 43 # include <linux/utsname.h>
 44 
 45 #include <lustre_acl.h>
 46 #include <obd_class.h>
 47 #include <lustre_fid.h>
 48 #include <lprocfs_status.h>
 49 #include <lustre_param.h>
 50 #include <lustre_log.h>
 51 
 52 #include "mdc_internal.h"
 53 
 54 #define REQUEST_MINOR 244
 55 
 56 struct mdc_renew_capa_args {
 57         struct obd_capa *ra_oc;
 58         renew_capa_cb_t  ra_cb;
 59 };
 60 
 61 static int mdc_cleanup(struct obd_device *obd);
 62 
 63 int mdc_unpack_capa(struct obd_export *exp, struct ptlrpc_request *req,
 64                     const struct req_msg_field *field, struct obd_capa **oc)
 65 {
 66         struct lustre_capa *capa;
 67         struct obd_capa *c;
 68 
 69         /* swabbed already in mdc_enqueue */
 70         capa = req_capsule_server_get(&req->rq_pill, field);
 71         if (capa == NULL)
 72                 return -EPROTO;
 73 
 74         c = alloc_capa(CAPA_SITE_CLIENT);
 75         if (IS_ERR(c)) {
 76                 CDEBUG(D_INFO, "alloc capa failed!\n");
 77                 return PTR_ERR(c);
 78         } else {
 79                 c->c_capa = *capa;
 80                 *oc = c;
 81                 return 0;
 82         }
 83 }
 84 
 85 static inline int mdc_queue_wait(struct ptlrpc_request *req)
 86 {
 87         struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
 88         int rc;
 89 
 90         /* mdc_enter_request() ensures that this client has no more
 91          * than cl_max_rpcs_in_flight RPCs simultaneously inf light
 92          * against an MDT. */
 93         rc = mdc_enter_request(cli);
 94         if (rc != 0)
 95                 return rc;
 96 
 97         rc = ptlrpc_queue_wait(req);
 98         mdc_exit_request(cli);
 99 
100         return rc;
101 }
102 
103 /* Helper that implements most of mdc_getstatus and signal_completed_replay. */
104 /* XXX this should become mdc_get_info("key"), sending MDS_GET_INFO RPC */
105 static int send_getstatus(struct obd_import *imp, struct lu_fid *rootfid,
106                           struct obd_capa **pc, int level, int msg_flags)
107 {
108         struct ptlrpc_request *req;
109         struct mdt_body       *body;
110         int                 rc;
111 
112         req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_GETSTATUS,
113                                         LUSTRE_MDS_VERSION, MDS_GETSTATUS);
114         if (req == NULL)
115                 return -ENOMEM;
116 
117         mdc_pack_body(req, NULL, NULL, 0, 0, -1, 0);
118         lustre_msg_add_flags(req->rq_reqmsg, msg_flags);
119         req->rq_send_state = level;
120 
121         ptlrpc_request_set_replen(req);
122 
123         rc = ptlrpc_queue_wait(req);
124         if (rc)
125                 GOTO(out, rc);
126 
127         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
128         if (body == NULL)
129                 GOTO(out, rc = -EPROTO);
130 
131         if (body->valid & OBD_MD_FLMDSCAPA) {
132                 rc = mdc_unpack_capa(NULL, req, &RMF_CAPA1, pc);
133                 if (rc)
134                         GOTO(out, rc);
135         }
136 
137         *rootfid = body->fid1;
138         CDEBUG(D_NET,
139                "root fid="DFID", last_committed="LPU64"\n",
140                PFID(rootfid),
141                lustre_msg_get_last_committed(req->rq_repmsg));
142 out:
143         ptlrpc_req_finished(req);
144         return rc;
145 }
146 
147 /* This should be mdc_get_info("rootfid") */
148 int mdc_getstatus(struct obd_export *exp, struct lu_fid *rootfid,
149                   struct obd_capa **pc)
150 {
151         return send_getstatus(class_exp2cliimp(exp), rootfid, pc,
152                               LUSTRE_IMP_FULL, 0);
153 }
154 
155 /*
156  * This function now is known to always saying that it will receive 4 buffers
157  * from server. Even for cases when acl_size and md_size is zero, RPC header
158  * will contain 4 fields and RPC itself will contain zero size fields. This is
159  * because mdt_getattr*() _always_ returns 4 fields, but if acl is not needed
160  * and thus zero, it shrinks it, making zero size. The same story about
161  * md_size. And this is course of problem when client waits for smaller number
162  * of fields. This issue will be fixed later when client gets aware of RPC
163  * layouts.  --umka
164  */
165 static int mdc_getattr_common(struct obd_export *exp,
166                               struct ptlrpc_request *req)
167 {
168         struct req_capsule *pill = &req->rq_pill;
169         struct mdt_body    *body;
170         void           *eadata;
171         int              rc;
172 
173         /* Request message already built. */
174         rc = ptlrpc_queue_wait(req);
175         if (rc != 0)
176                 return rc;
177 
178         /* sanity check for the reply */
179         body = req_capsule_server_get(pill, &RMF_MDT_BODY);
180         if (body == NULL)
181                 return -EPROTO;
182 
183         CDEBUG(D_NET, "mode: %o\n", body->mode);
184 
185         if (body->eadatasize != 0) {
186                 mdc_update_max_ea_from_body(exp, body);
187 
188                 eadata = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
189                                                       body->eadatasize);
190                 if (eadata == NULL)
191                         return -EPROTO;
192         }
193 
194         if (body->valid & OBD_MD_FLRMTPERM) {
195                 struct mdt_remote_perm *perm;
196 
197                 LASSERT(client_is_remote(exp));
198                 perm = req_capsule_server_swab_get(pill, &RMF_ACL,
199                                                 lustre_swab_mdt_remote_perm);
200                 if (perm == NULL)
201                         return -EPROTO;
202         }
203 
204         if (body->valid & OBD_MD_FLMDSCAPA) {
205                 struct lustre_capa *capa;
206                 capa = req_capsule_server_get(pill, &RMF_CAPA1);
207                 if (capa == NULL)
208                         return -EPROTO;
209         }
210 
211         return 0;
212 }
213 
214 int mdc_getattr(struct obd_export *exp, struct md_op_data *op_data,
215                 struct ptlrpc_request **request)
216 {
217         struct ptlrpc_request *req;
218         int                 rc;
219 
220         /* Single MDS without an LMV case */
221         if (op_data->op_flags & MF_GET_MDT_IDX) {
222                 op_data->op_mds = 0;
223                 return 0;
224         }
225         *request = NULL;
226         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
227         if (req == NULL)
228                 return -ENOMEM;
229 
230         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
231 
232         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
233         if (rc) {
234                 ptlrpc_request_free(req);
235                 return rc;
236         }
237 
238         mdc_pack_body(req, &op_data->op_fid1, op_data->op_capa1,
239                       op_data->op_valid, op_data->op_mode, -1, 0);
240 
241         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
242                              op_data->op_mode);
243         if (op_data->op_valid & OBD_MD_FLRMTPERM) {
244                 LASSERT(client_is_remote(exp));
245                 req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
246                                      sizeof(struct mdt_remote_perm));
247         }
248         ptlrpc_request_set_replen(req);
249 
250         rc = mdc_getattr_common(exp, req);
251         if (rc)
252                 ptlrpc_req_finished(req);
253         else
254                 *request = req;
255         return rc;
256 }
257 
258 int mdc_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
259                      struct ptlrpc_request **request)
260 {
261         struct ptlrpc_request *req;
262         int                 rc;
263 
264         *request = NULL;
265         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
266                                    &RQF_MDS_GETATTR_NAME);
267         if (req == NULL)
268                 return -ENOMEM;
269 
270         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
271         req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
272                              op_data->op_namelen + 1);
273 
274         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR_NAME);
275         if (rc) {
276                 ptlrpc_request_free(req);
277                 return rc;
278         }
279 
280         mdc_pack_body(req, &op_data->op_fid1, op_data->op_capa1,
281                       op_data->op_valid, op_data->op_mode,
282                       op_data->op_suppgids[0], 0);
283 
284         if (op_data->op_name) {
285                 char *name = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
286                 LASSERT(strnlen(op_data->op_name, op_data->op_namelen) ==
287                                 op_data->op_namelen);
288                 memcpy(name, op_data->op_name, op_data->op_namelen);
289         }
290 
291         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
292                              op_data->op_mode);
293         ptlrpc_request_set_replen(req);
294 
295         rc = mdc_getattr_common(exp, req);
296         if (rc)
297                 ptlrpc_req_finished(req);
298         else
299                 *request = req;
300         return rc;
301 }
302 
303 static int mdc_is_subdir(struct obd_export *exp,
304                          const struct lu_fid *pfid,
305                          const struct lu_fid *cfid,
306                          struct ptlrpc_request **request)
307 {
308         struct ptlrpc_request  *req;
309         int                  rc;
310 
311         *request = NULL;
312         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
313                                         &RQF_MDS_IS_SUBDIR, LUSTRE_MDS_VERSION,
314                                         MDS_IS_SUBDIR);
315         if (req == NULL)
316                 return -ENOMEM;
317 
318         mdc_is_subdir_pack(req, pfid, cfid, 0);
319         ptlrpc_request_set_replen(req);
320 
321         rc = ptlrpc_queue_wait(req);
322         if (rc && rc != -EREMOTE)
323                 ptlrpc_req_finished(req);
324         else
325                 *request = req;
326         return rc;
327 }
328 
329 static int mdc_xattr_common(struct obd_export *exp,const struct req_format *fmt,
330                             const struct lu_fid *fid,
331                             struct obd_capa *oc, int opcode, obd_valid valid,
332                             const char *xattr_name, const char *input,
333                             int input_size, int output_size, int flags,
334                             __u32 suppgid, struct ptlrpc_request **request)
335 {
336         struct ptlrpc_request *req;
337         int   xattr_namelen = 0;
338         char *tmp;
339         int   rc;
340 
341         *request = NULL;
342         req = ptlrpc_request_alloc(class_exp2cliimp(exp), fmt);
343         if (req == NULL)
344                 return -ENOMEM;
345 
346         mdc_set_capa_size(req, &RMF_CAPA1, oc);
347         if (xattr_name) {
348                 xattr_namelen = strlen(xattr_name) + 1;
349                 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
350                                      xattr_namelen);
351         }
352         if (input_size) {
353                 LASSERT(input);
354                 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
355                                      input_size);
356         }
357 
358         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, opcode);
359         if (rc) {
360                 ptlrpc_request_free(req);
361                 return rc;
362         }
363 
364         if (opcode == MDS_REINT) {
365                 struct mdt_rec_setxattr *rec;
366 
367                 CLASSERT(sizeof(struct mdt_rec_setxattr) ==
368                          sizeof(struct mdt_rec_reint));
369                 rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
370                 rec->sx_opcode = REINT_SETXATTR;
371                 rec->sx_fsuid  = from_kuid(&init_user_ns, current_fsuid());
372                 rec->sx_fsgid  = from_kgid(&init_user_ns, current_fsgid());
373                 rec->sx_cap    = cfs_curproc_cap_pack();
374                 rec->sx_suppgid1 = suppgid;
375                 rec->sx_suppgid2 = -1;
376                 rec->sx_fid    = *fid;
377                 rec->sx_valid  = valid | OBD_MD_FLCTIME;
378                 rec->sx_time   = cfs_time_current_sec();
379                 rec->sx_size   = output_size;
380                 rec->sx_flags  = flags;
381 
382                 mdc_pack_capa(req, &RMF_CAPA1, oc);
383         } else {
384                 mdc_pack_body(req, fid, oc, valid, output_size, suppgid, flags);
385         }
386 
387         if (xattr_name) {
388                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
389                 memcpy(tmp, xattr_name, xattr_namelen);
390         }
391         if (input_size) {
392                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_EADATA);
393                 memcpy(tmp, input, input_size);
394         }
395 
396         if (req_capsule_has_field(&req->rq_pill, &RMF_EADATA, RCL_SERVER))
397                 req_capsule_set_size(&req->rq_pill, &RMF_EADATA,
398                                      RCL_SERVER, output_size);
399         ptlrpc_request_set_replen(req);
400 
401         /* make rpc */
402         if (opcode == MDS_REINT)
403                 mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
404 
405         rc = ptlrpc_queue_wait(req);
406 
407         if (opcode == MDS_REINT)
408                 mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
409 
410         if (rc)
411                 ptlrpc_req_finished(req);
412         else
413                 *request = req;
414         return rc;
415 }
416 
417 int mdc_setxattr(struct obd_export *exp, const struct lu_fid *fid,
418                  struct obd_capa *oc, obd_valid valid, const char *xattr_name,
419                  const char *input, int input_size, int output_size,
420                  int flags, __u32 suppgid, struct ptlrpc_request **request)
421 {
422         return mdc_xattr_common(exp, &RQF_MDS_REINT_SETXATTR,
423                                 fid, oc, MDS_REINT, valid, xattr_name,
424                                 input, input_size, output_size, flags,
425                                 suppgid, request);
426 }
427 
428 int mdc_getxattr(struct obd_export *exp, const struct lu_fid *fid,
429                  struct obd_capa *oc, obd_valid valid, const char *xattr_name,
430                  const char *input, int input_size, int output_size,
431                  int flags, struct ptlrpc_request **request)
432 {
433         return mdc_xattr_common(exp, &RQF_MDS_GETXATTR,
434                                 fid, oc, MDS_GETXATTR, valid, xattr_name,
435                                 input, input_size, output_size, flags,
436                                 -1, request);
437 }
438 
439 #ifdef CONFIG_FS_POSIX_ACL
440 static int mdc_unpack_acl(struct ptlrpc_request *req, struct lustre_md *md)
441 {
442         struct req_capsule     *pill = &req->rq_pill;
443         struct mdt_body *body = md->body;
444         struct posix_acl       *acl;
445         void               *buf;
446         int                  rc;
447 
448         if (!body->aclsize)
449                 return 0;
450 
451         buf = req_capsule_server_sized_get(pill, &RMF_ACL, body->aclsize);
452 
453         if (!buf)
454                 return -EPROTO;
455 
456         acl = posix_acl_from_xattr(&init_user_ns, buf, body->aclsize);
457         if (IS_ERR(acl)) {
458                 rc = PTR_ERR(acl);
459                 CERROR("convert xattr to acl: %d\n", rc);
460                 return rc;
461         }
462 
463         rc = posix_acl_valid(acl);
464         if (rc) {
465                 CERROR("validate acl: %d\n", rc);
466                 posix_acl_release(acl);
467                 return rc;
468         }
469 
470         md->posix_acl = acl;
471         return 0;
472 }
473 #else
474 #define mdc_unpack_acl(req, md) 0
475 #endif
476 
477 int mdc_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
478                       struct obd_export *dt_exp, struct obd_export *md_exp,
479                       struct lustre_md *md)
480 {
481         struct req_capsule *pill = &req->rq_pill;
482         int rc;
483 
484         LASSERT(md);
485         memset(md, 0, sizeof(*md));
486 
487         md->body = req_capsule_server_get(pill, &RMF_MDT_BODY);
488         LASSERT(md->body != NULL);
489 
490         if (md->body->valid & OBD_MD_FLEASIZE) {
491                 int lmmsize;
492                 struct lov_mds_md *lmm;
493 
494                 if (!S_ISREG(md->body->mode)) {
495                         CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, should be a "
496                                "regular file, but is not\n");
497                         GOTO(out, rc = -EPROTO);
498                 }
499 
500                 if (md->body->eadatasize == 0) {
501                         CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, "
502                                "but eadatasize 0\n");
503                         GOTO(out, rc = -EPROTO);
504                 }
505                 lmmsize = md->body->eadatasize;
506                 lmm = req_capsule_server_sized_get(pill, &RMF_MDT_MD, lmmsize);
507                 if (!lmm)
508                         GOTO(out, rc = -EPROTO);
509 
510                 rc = obd_unpackmd(dt_exp, &md->lsm, lmm, lmmsize);
511                 if (rc < 0)
512                         GOTO(out, rc);
513 
514                 if (rc < sizeof(*md->lsm)) {
515                         CDEBUG(D_INFO, "lsm size too small: "
516                                "rc < sizeof (*md->lsm) (%d < %d)\n",
517                                rc, (int)sizeof(*md->lsm));
518                         GOTO(out, rc = -EPROTO);
519                 }
520 
521         } else if (md->body->valid & OBD_MD_FLDIREA) {
522                 int lmvsize;
523                 struct lov_mds_md *lmv;
524 
525                 if(!S_ISDIR(md->body->mode)) {
526                         CDEBUG(D_INFO, "OBD_MD_FLDIREA set, should be a "
527                                "directory, but is not\n");
528                         GOTO(out, rc = -EPROTO);
529                 }
530 
531                 if (md->body->eadatasize == 0) {
532                         CDEBUG(D_INFO, "OBD_MD_FLDIREA is set, "
533                                "but eadatasize 0\n");
534                         return -EPROTO;
535                 }
536                 if (md->body->valid & OBD_MD_MEA) {
537                         lmvsize = md->body->eadatasize;
538                         lmv = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
539                                                            lmvsize);
540                         if (!lmv)
541                                 GOTO(out, rc = -EPROTO);
542 
543                         rc = obd_unpackmd(md_exp, (void *)&md->mea, lmv,
544                                           lmvsize);
545                         if (rc < 0)
546                                 GOTO(out, rc);
547 
548                         if (rc < sizeof(*md->mea)) {
549                                 CDEBUG(D_INFO, "size too small:  "
550                                        "rc < sizeof(*md->mea) (%d < %d)\n",
551                                         rc, (int)sizeof(*md->mea));
552                                 GOTO(out, rc = -EPROTO);
553                         }
554                 }
555         }
556         rc = 0;
557 
558         if (md->body->valid & OBD_MD_FLRMTPERM) {
559                 /* remote permission */
560                 LASSERT(client_is_remote(exp));
561                 md->remote_perm = req_capsule_server_swab_get(pill, &RMF_ACL,
562                                                 lustre_swab_mdt_remote_perm);
563                 if (!md->remote_perm)
564                         GOTO(out, rc = -EPROTO);
565         }
566         else if (md->body->valid & OBD_MD_FLACL) {
567                 /* for ACL, it's possible that FLACL is set but aclsize is zero.
568                  * only when aclsize != 0 there's an actual segment for ACL
569                  * in reply buffer.
570                  */
571                 if (md->body->aclsize) {
572                         rc = mdc_unpack_acl(req, md);
573                         if (rc)
574                                 GOTO(out, rc);
575 #ifdef CONFIG_FS_POSIX_ACL
576                 } else {
577                         md->posix_acl = NULL;
578 #endif
579                 }
580         }
581         if (md->body->valid & OBD_MD_FLMDSCAPA) {
582                 struct obd_capa *oc = NULL;
583 
584                 rc = mdc_unpack_capa(NULL, req, &RMF_CAPA1, &oc);
585                 if (rc)
586                         GOTO(out, rc);
587                 md->mds_capa = oc;
588         }
589 
590         if (md->body->valid & OBD_MD_FLOSSCAPA) {
591                 struct obd_capa *oc = NULL;
592 
593                 rc = mdc_unpack_capa(NULL, req, &RMF_CAPA2, &oc);
594                 if (rc)
595                         GOTO(out, rc);
596                 md->oss_capa = oc;
597         }
598 
599 out:
600         if (rc) {
601                 if (md->oss_capa) {
602                         capa_put(md->oss_capa);
603                         md->oss_capa = NULL;
604                 }
605                 if (md->mds_capa) {
606                         capa_put(md->mds_capa);
607                         md->mds_capa = NULL;
608                 }
609 #ifdef CONFIG_FS_POSIX_ACL
610                 posix_acl_release(md->posix_acl);
611 #endif
612                 if (md->lsm)
613                         obd_free_memmd(dt_exp, &md->lsm);
614         }
615         return rc;
616 }
617 
618 int mdc_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
619 {
620         return 0;
621 }
622 
623 /**
624  * Handles both OPEN and SETATTR RPCs for OPEN-CLOSE and SETATTR-DONE_WRITING
625  * RPC chains.
626  */
627 void mdc_replay_open(struct ptlrpc_request *req)
628 {
629         struct md_open_data *mod = req->rq_cb_data;
630         struct ptlrpc_request *close_req;
631         struct obd_client_handle *och;
632         struct lustre_handle old;
633         struct mdt_body *body;
634 
635         if (mod == NULL) {
636                 DEBUG_REQ(D_ERROR, req,
637                           "Can't properly replay without open data.");
638                 return;
639         }
640 
641         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
642         LASSERT(body != NULL);
643 
644         och = mod->mod_och;
645         if (och != NULL) {
646                 struct lustre_handle *file_fh;
647 
648                 LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
649 
650                 file_fh = &och->och_fh;
651                 CDEBUG(D_HA, "updating handle from "LPX64" to "LPX64"\n",
652                        file_fh->cookie, body->handle.cookie);
653                 old = *file_fh;
654                 *file_fh = body->handle;
655         }
656         close_req = mod->mod_close_req;
657         if (close_req != NULL) {
658                 __u32 opc = lustre_msg_get_opc(close_req->rq_reqmsg);
659                 struct mdt_ioepoch *epoch;
660 
661                 LASSERT(opc == MDS_CLOSE || opc == MDS_DONE_WRITING);
662                 epoch = req_capsule_client_get(&close_req->rq_pill,
663                                                &RMF_MDT_EPOCH);
664                 LASSERT(epoch);
665 
666                 if (och != NULL)
667                         LASSERT(!memcmp(&old, &epoch->handle, sizeof(old)));
668                 DEBUG_REQ(D_HA, close_req, "updating close body with new fh");
669                 epoch->handle = body->handle;
670         }
671 }
672 
673 void mdc_commit_open(struct ptlrpc_request *req)
674 {
675         struct md_open_data *mod = req->rq_cb_data;
676         if (mod == NULL)
677                 return;
678 
679         /**
680          * No need to touch md_open_data::mod_och, it holds a reference on
681          * \var mod and will zero references to each other, \var mod will be
682          * freed after that when md_open_data::mod_och will put the reference.
683          */
684 
685         /**
686          * Do not let open request to disappear as it still may be needed
687          * for close rpc to happen (it may happen on evict only, otherwise
688          * ptlrpc_request::rq_replay does not let mdc_commit_open() to be
689          * called), just mark this rpc as committed to distinguish these 2
690          * cases, see mdc_close() for details. The open request reference will
691          * be put along with freeing \var mod.
692          */
693         ptlrpc_request_addref(req);
694         spin_lock(&req->rq_lock);
695         req->rq_committed = 1;
696         spin_unlock(&req->rq_lock);
697         req->rq_cb_data = NULL;
698         obd_mod_put(mod);
699 }
700 
701 int mdc_set_open_replay_data(struct obd_export *exp,
702                              struct obd_client_handle *och,
703                              struct ptlrpc_request *open_req)
704 {
705         struct md_open_data   *mod;
706         struct mdt_rec_create *rec;
707         struct mdt_body       *body;
708         struct obd_import     *imp = open_req->rq_import;
709 
710         if (!open_req->rq_replay)
711                 return 0;
712 
713         rec = req_capsule_client_get(&open_req->rq_pill, &RMF_REC_REINT);
714         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
715         LASSERT(rec != NULL);
716         /* Incoming message in my byte order (it's been swabbed). */
717         /* Outgoing messages always in my byte order. */
718         LASSERT(body != NULL);
719 
720         /* Only if the import is replayable, we set replay_open data */
721         if (och && imp->imp_replayable) {
722                 mod = obd_mod_alloc();
723                 if (mod == NULL) {
724                         DEBUG_REQ(D_ERROR, open_req,
725                                   "Can't allocate md_open_data");
726                         return 0;
727                 }
728 
729                 /**
730                  * Take a reference on \var mod, to be freed on mdc_close().
731                  * It protects \var mod from being freed on eviction (commit
732                  * callback is called despite rq_replay flag).
733                  * Another reference for \var och.
734                  */
735                 obd_mod_get(mod);
736                 obd_mod_get(mod);
737 
738                 spin_lock(&open_req->rq_lock);
739                 och->och_mod = mod;
740                 mod->mod_och = och;
741                 mod->mod_open_req = open_req;
742                 open_req->rq_cb_data = mod;
743                 open_req->rq_commit_cb = mdc_commit_open;
744                 spin_unlock(&open_req->rq_lock);
745         }
746 
747         rec->cr_fid2 = body->fid1;
748         rec->cr_ioepoch = body->ioepoch;
749         rec->cr_old_handle.cookie = body->handle.cookie;
750         open_req->rq_replay_cb = mdc_replay_open;
751         if (!fid_is_sane(&body->fid1)) {
752                 DEBUG_REQ(D_ERROR, open_req, "Saving replay request with "
753                           "insane fid");
754                 LBUG();
755         }
756 
757         DEBUG_REQ(D_RPCTRACE, open_req, "Set up open replay data");
758         return 0;
759 }
760 
761 int mdc_clear_open_replay_data(struct obd_export *exp,
762                                struct obd_client_handle *och)
763 {
764         struct md_open_data *mod = och->och_mod;
765 
766         /**
767          * It is possible to not have \var mod in a case of eviction between
768          * lookup and ll_file_open().
769          **/
770         if (mod == NULL)
771                 return 0;
772 
773         LASSERT(mod != LP_POISON);
774 
775         mod->mod_och = NULL;
776         och->och_mod = NULL;
777         obd_mod_put(mod);
778 
779         return 0;
780 }
781 
782 /* Prepares the request for the replay by the given reply */
783 static void mdc_close_handle_reply(struct ptlrpc_request *req,
784                                    struct md_op_data *op_data, int rc) {
785         struct mdt_body  *repbody;
786         struct mdt_ioepoch *epoch;
787 
788         if (req && rc == -EAGAIN) {
789                 repbody = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
790                 epoch = req_capsule_client_get(&req->rq_pill, &RMF_MDT_EPOCH);
791 
792                 epoch->flags |= MF_SOM_AU;
793                 if (repbody->valid & OBD_MD_FLGETATTRLOCK)
794                         op_data->op_flags |= MF_GETATTR_LOCK;
795         }
796 }
797 
798 int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
799               struct md_open_data *mod, struct ptlrpc_request **request)
800 {
801         struct obd_device     *obd = class_exp2obd(exp);
802         struct ptlrpc_request *req;
803         struct req_format     *req_fmt;
804         int                    rc;
805         int                    saved_rc = 0;
806 
807 
808         req_fmt = &RQF_MDS_CLOSE;
809         if (op_data->op_bias & MDS_HSM_RELEASE) {
810                 req_fmt = &RQF_MDS_RELEASE_CLOSE;
811 
812                 /* allocate a FID for volatile file */
813                 rc = mdc_fid_alloc(exp, &op_data->op_fid2, op_data);
814                 if (rc < 0) {
815                         CERROR("%s: "DFID" failed to allocate FID: %d\n",
816                                obd->obd_name, PFID(&op_data->op_fid1), rc);
817                         /* save the errcode and proceed to close */
818                         saved_rc = rc;
819                 }
820         }
821 
822         *request = NULL;
823         req = ptlrpc_request_alloc(class_exp2cliimp(exp), req_fmt);
824         if (req == NULL)
825                 return -ENOMEM;
826 
827         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
828 
829         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_CLOSE);
830         if (rc) {
831                 ptlrpc_request_free(req);
832                 return rc;
833         }
834 
835         /* To avoid a livelock (bug 7034), we need to send CLOSE RPCs to a
836          * portal whose threads are not taking any DLM locks and are therefore
837          * always progressing */
838         req->rq_request_portal = MDS_READPAGE_PORTAL;
839         ptlrpc_at_set_req_timeout(req);
840 
841         /* Ensure that this close's handle is fixed up during replay. */
842         if (likely(mod != NULL)) {
843                 LASSERTF(mod->mod_open_req != NULL &&
844                          mod->mod_open_req->rq_type != LI_POISON,
845                          "POISONED open %p!\n", mod->mod_open_req);
846 
847                 mod->mod_close_req = req;
848 
849                 DEBUG_REQ(D_HA, mod->mod_open_req, "matched open");
850                 /* We no longer want to preserve this open for replay even
851                  * though the open was committed. b=3632, b=3633 */
852                 spin_lock(&mod->mod_open_req->rq_lock);
853                 mod->mod_open_req->rq_replay = 0;
854                 spin_unlock(&mod->mod_open_req->rq_lock);
855         } else {
856                  CDEBUG(D_HA, "couldn't find open req; expecting close error\n");
857         }
858 
859         mdc_close_pack(req, op_data);
860 
861         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
862                              obd->u.cli.cl_max_mds_easize);
863         req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_SERVER,
864                              obd->u.cli.cl_max_mds_cookiesize);
865 
866         ptlrpc_request_set_replen(req);
867 
868         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
869         rc = ptlrpc_queue_wait(req);
870         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
871 
872         if (req->rq_repmsg == NULL) {
873                 CDEBUG(D_RPCTRACE, "request failed to send: %p, %d\n", req,
874                        req->rq_status);
875                 if (rc == 0)
876                         rc = req->rq_status ?: -EIO;
877         } else if (rc == 0 || rc == -EAGAIN) {
878                 struct mdt_body *body;
879 
880                 rc = lustre_msg_get_status(req->rq_repmsg);
881                 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
882                         DEBUG_REQ(D_ERROR, req, "type == PTL_RPC_MSG_ERR, err "
883                                   "= %d", rc);
884                         if (rc > 0)
885                                 rc = -rc;
886                 }
887                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
888                 if (body == NULL)
889                         rc = -EPROTO;
890         } else if (rc == -ESTALE) {
891                 /**
892                  * it can be allowed error after 3633 if open was committed and
893                  * server failed before close was sent. Let's check if mod
894                  * exists and return no error in that case
895                  */
896                 if (mod) {
897                         DEBUG_REQ(D_HA, req, "Reset ESTALE = %d", rc);
898                         LASSERT(mod->mod_open_req != NULL);
899                         if (mod->mod_open_req->rq_committed)
900                                 rc = 0;
901                 }
902         }
903 
904         if (mod) {
905                 if (rc != 0)
906                         mod->mod_close_req = NULL;
907                 /* Since now, mod is accessed through open_req only,
908                  * thus close req does not keep a reference on mod anymore. */
909                 obd_mod_put(mod);
910         }
911         *request = req;
912         mdc_close_handle_reply(req, op_data, rc);
913         return rc < 0 ? rc : saved_rc;
914 }
915 
916 int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
917                      struct md_open_data *mod)
918 {
919         struct obd_device     *obd = class_exp2obd(exp);
920         struct ptlrpc_request *req;
921         int                 rc;
922 
923         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
924                                    &RQF_MDS_DONE_WRITING);
925         if (req == NULL)
926                 return -ENOMEM;
927 
928         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
929         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_DONE_WRITING);
930         if (rc) {
931                 ptlrpc_request_free(req);
932                 return rc;
933         }
934 
935         if (mod != NULL) {
936                 LASSERTF(mod->mod_open_req != NULL &&
937                          mod->mod_open_req->rq_type != LI_POISON,
938                          "POISONED setattr %p!\n", mod->mod_open_req);
939 
940                 mod->mod_close_req = req;
941                 DEBUG_REQ(D_HA, mod->mod_open_req, "matched setattr");
942                 /* We no longer want to preserve this setattr for replay even
943                  * though the open was committed. b=3632, b=3633 */
944                 spin_lock(&mod->mod_open_req->rq_lock);
945                 mod->mod_open_req->rq_replay = 0;
946                 spin_unlock(&mod->mod_open_req->rq_lock);
947         }
948 
949         mdc_close_pack(req, op_data);
950         ptlrpc_request_set_replen(req);
951 
952         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
953         rc = ptlrpc_queue_wait(req);
954         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
955 
956         if (rc == -ESTALE) {
957                 /**
958                  * it can be allowed error after 3633 if open or setattr were
959                  * committed and server failed before close was sent.
960                  * Let's check if mod exists and return no error in that case
961                  */
962                 if (mod) {
963                         LASSERT(mod->mod_open_req != NULL);
964                         if (mod->mod_open_req->rq_committed)
965                                 rc = 0;
966                 }
967         }
968 
969         if (mod) {
970                 if (rc != 0)
971                         mod->mod_close_req = NULL;
972                 /* Since now, mod is accessed through setattr req only,
973                  * thus DW req does not keep a reference on mod anymore. */
974                 obd_mod_put(mod);
975         }
976 
977         mdc_close_handle_reply(req, op_data, rc);
978         ptlrpc_req_finished(req);
979         return rc;
980 }
981 
982 
983 int mdc_readpage(struct obd_export *exp, struct md_op_data *op_data,
984                  struct page **pages, struct ptlrpc_request **request)
985 {
986         struct ptlrpc_request   *req;
987         struct ptlrpc_bulk_desc *desc;
988         int                   i;
989         wait_queue_head_t             waitq;
990         int                   resends = 0;
991         struct l_wait_info       lwi;
992         int                   rc;
993 
994         *request = NULL;
995         init_waitqueue_head(&waitq);
996 
997 restart_bulk:
998         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_READPAGE);
999         if (req == NULL)
1000                 return -ENOMEM;
1001 
1002         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
1003 
1004         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_READPAGE);
1005         if (rc) {
1006                 ptlrpc_request_free(req);
1007                 return rc;
1008         }
1009 
1010         req->rq_request_portal = MDS_READPAGE_PORTAL;
1011         ptlrpc_at_set_req_timeout(req);
1012 
1013         desc = ptlrpc_prep_bulk_imp(req, op_data->op_npages, 1, BULK_PUT_SINK,
1014                                     MDS_BULK_PORTAL);
1015         if (desc == NULL) {
1016                 ptlrpc_request_free(req);
1017                 return -ENOMEM;
1018         }
1019 
1020         /* NB req now owns desc and will free it when it gets freed */
1021         for (i = 0; i < op_data->op_npages; i++)
1022                 ptlrpc_prep_bulk_page_pin(desc, pages[i], 0, PAGE_CACHE_SIZE);
1023 
1024         mdc_readdir_pack(req, op_data->op_offset,
1025                          PAGE_CACHE_SIZE * op_data->op_npages,
1026                          &op_data->op_fid1, op_data->op_capa1);
1027 
1028         ptlrpc_request_set_replen(req);
1029         rc = ptlrpc_queue_wait(req);
1030         if (rc) {
1031                 ptlrpc_req_finished(req);
1032                 if (rc != -ETIMEDOUT)
1033                         return rc;
1034 
1035                 resends++;
1036                 if (!client_should_resend(resends, &exp->exp_obd->u.cli)) {
1037                         CERROR("too many resend retries, returning error\n");
1038                         return -EIO;
1039                 }
1040                 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends), NULL, NULL, NULL);
1041                 l_wait_event(waitq, 0, &lwi);
1042 
1043                 goto restart_bulk;
1044         }
1045 
1046         rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk,
1047                                           req->rq_bulk->bd_nob_transferred);
1048         if (rc < 0) {
1049                 ptlrpc_req_finished(req);
1050                 return rc;
1051         }
1052 
1053         if (req->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK) {
1054                 CERROR("Unexpected # bytes transferred: %d (%ld expected)\n",
1055                         req->rq_bulk->bd_nob_transferred,
1056                         PAGE_CACHE_SIZE * op_data->op_npages);
1057                 ptlrpc_req_finished(req);
1058                 return -EPROTO;
1059         }
1060 
1061         *request = req;
1062         return 0;
1063 }
1064 
1065 static int mdc_statfs(const struct lu_env *env,
1066                       struct obd_export *exp, struct obd_statfs *osfs,
1067                       __u64 max_age, __u32 flags)
1068 {
1069         struct obd_device     *obd = class_exp2obd(exp);
1070         struct ptlrpc_request *req;
1071         struct obd_statfs     *msfs;
1072         struct obd_import     *imp = NULL;
1073         int                 rc;
1074 
1075         /*
1076          * Since the request might also come from lprocfs, so we need
1077          * sync this with client_disconnect_export Bug15684
1078          */
1079         down_read(&obd->u.cli.cl_sem);
1080         if (obd->u.cli.cl_import)
1081                 imp = class_import_get(obd->u.cli.cl_import);
1082         up_read(&obd->u.cli.cl_sem);
1083         if (!imp)
1084                 return -ENODEV;
1085 
1086         req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_STATFS,
1087                                         LUSTRE_MDS_VERSION, MDS_STATFS);
1088         if (req == NULL)
1089                 GOTO(output, rc = -ENOMEM);
1090 
1091         ptlrpc_request_set_replen(req);
1092 
1093         if (flags & OBD_STATFS_NODELAY) {
1094                 /* procfs requests not want stay in wait for avoid deadlock */
1095                 req->rq_no_resend = 1;
1096                 req->rq_no_delay = 1;
1097         }
1098 
1099         rc = ptlrpc_queue_wait(req);
1100         if (rc) {
1101                 /* check connection error first */
1102                 if (imp->imp_connect_error)
1103                         rc = imp->imp_connect_error;
1104                 GOTO(out, rc);
1105         }
1106 
1107         msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
1108         if (msfs == NULL)
1109                 GOTO(out, rc = -EPROTO);
1110 
1111         *osfs = *msfs;
1112 out:
1113         ptlrpc_req_finished(req);
1114 output:
1115         class_import_put(imp);
1116         return rc;
1117 }
1118 
1119 static int mdc_ioc_fid2path(struct obd_export *exp, struct getinfo_fid2path *gf)
1120 {
1121         __u32 keylen, vallen;
1122         void *key;
1123         int rc;
1124 
1125         if (gf->gf_pathlen > PATH_MAX)
1126                 return -ENAMETOOLONG;
1127         if (gf->gf_pathlen < 2)
1128                 return -EOVERFLOW;
1129 
1130         /* Key is KEY_FID2PATH + getinfo_fid2path description */
1131         keylen = cfs_size_round(sizeof(KEY_FID2PATH)) + sizeof(*gf);
1132         OBD_ALLOC(key, keylen);
1133         if (key == NULL)
1134                 return -ENOMEM;
1135         memcpy(key, KEY_FID2PATH, sizeof(KEY_FID2PATH));
1136         memcpy(key + cfs_size_round(sizeof(KEY_FID2PATH)), gf, sizeof(*gf));
1137 
1138         CDEBUG(D_IOCTL, "path get "DFID" from "LPU64" #%d\n",
1139                PFID(&gf->gf_fid), gf->gf_recno, gf->gf_linkno);
1140 
1141         if (!fid_is_sane(&gf->gf_fid))
1142                 GOTO(out, rc = -EINVAL);
1143 
1144         /* Val is struct getinfo_fid2path result plus path */
1145         vallen = sizeof(*gf) + gf->gf_pathlen;
1146 
1147         rc = obd_get_info(NULL, exp, keylen, key, &vallen, gf, NULL);
1148         if (rc != 0 && rc != -EREMOTE)
1149                 GOTO(out, rc);
1150 
1151         if (vallen <= sizeof(*gf))
1152                 GOTO(out, rc = -EPROTO);
1153         else if (vallen > sizeof(*gf) + gf->gf_pathlen)
1154                 GOTO(out, rc = -EOVERFLOW);
1155 
1156         CDEBUG(D_IOCTL, "path get "DFID" from "LPU64" #%d\n%s\n",
1157                PFID(&gf->gf_fid), gf->gf_recno, gf->gf_linkno, gf->gf_path);
1158 
1159 out:
1160         OBD_FREE(key, keylen);
1161         return rc;
1162 }
1163 
1164 static int mdc_ioc_hsm_progress(struct obd_export *exp,
1165                                 struct hsm_progress_kernel *hpk)
1166 {
1167         struct obd_import               *imp = class_exp2cliimp(exp);
1168         struct hsm_progress_kernel      *req_hpk;
1169         struct ptlrpc_request           *req;
1170         int                              rc;
1171 
1172         req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_PROGRESS,
1173                                         LUSTRE_MDS_VERSION, MDS_HSM_PROGRESS);
1174         if (req == NULL)
1175                 GOTO(out, rc = -ENOMEM);
1176 
1177         mdc_pack_body(req, NULL, NULL, OBD_MD_FLRMTPERM, 0, 0, 0);
1178 
1179         /* Copy hsm_progress struct */
1180         req_hpk = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_PROGRESS);
1181         if (req_hpk == NULL)
1182                 GOTO(out, rc = -EPROTO);
1183 
1184         *req_hpk = *hpk;
1185         req_hpk->hpk_errval = lustre_errno_hton(hpk->hpk_errval);
1186 
1187         ptlrpc_request_set_replen(req);
1188 
1189         rc = mdc_queue_wait(req);
1190         GOTO(out, rc);
1191 out:
1192         ptlrpc_req_finished(req);
1193         return rc;
1194 }
1195 
1196 static int mdc_ioc_hsm_ct_register(struct obd_import *imp, __u32 archives)
1197 {
1198         __u32                   *archive_mask;
1199         struct ptlrpc_request   *req;
1200         int                      rc;
1201 
1202         req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_CT_REGISTER,
1203                                         LUSTRE_MDS_VERSION,
1204                                         MDS_HSM_CT_REGISTER);
1205         if (req == NULL)
1206                 GOTO(out, rc = -ENOMEM);
1207 
1208         mdc_pack_body(req, NULL, NULL, OBD_MD_FLRMTPERM, 0, 0, 0);
1209 
1210         /* Copy hsm_progress struct */
1211         archive_mask = req_capsule_client_get(&req->rq_pill,
1212                                               &RMF_MDS_HSM_ARCHIVE);
1213         if (archive_mask == NULL)
1214                 GOTO(out, rc = -EPROTO);
1215 
1216         *archive_mask = archives;
1217 
1218         ptlrpc_request_set_replen(req);
1219 
1220         rc = mdc_queue_wait(req);
1221         GOTO(out, rc);
1222 out:
1223         ptlrpc_req_finished(req);
1224         return rc;
1225 }
1226 
1227 static int mdc_ioc_hsm_current_action(struct obd_export *exp,
1228                                       struct md_op_data *op_data)
1229 {
1230         struct hsm_current_action       *hca = op_data->op_data;
1231         struct hsm_current_action       *req_hca;
1232         struct ptlrpc_request           *req;
1233         int                              rc;
1234 
1235         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
1236                                    &RQF_MDS_HSM_ACTION);
1237         if (req == NULL)
1238                 return -ENOMEM;
1239 
1240         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
1241 
1242         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_ACTION);
1243         if (rc) {
1244                 ptlrpc_request_free(req);
1245                 return rc;
1246         }
1247 
1248         mdc_pack_body(req, &op_data->op_fid1, op_data->op_capa1,
1249                       OBD_MD_FLRMTPERM, 0, op_data->op_suppgids[0], 0);
1250 
1251         ptlrpc_request_set_replen(req);
1252 
1253         rc = mdc_queue_wait(req);
1254         if (rc)
1255                 GOTO(out, rc);
1256 
1257         req_hca = req_capsule_server_get(&req->rq_pill,
1258                                          &RMF_MDS_HSM_CURRENT_ACTION);
1259         if (req_hca == NULL)
1260                 GOTO(out, rc = -EPROTO);
1261 
1262         *hca = *req_hca;
1263 
1264 out:
1265         ptlrpc_req_finished(req);
1266         return rc;
1267 }
1268 
1269 static int mdc_ioc_hsm_ct_unregister(struct obd_import *imp)
1270 {
1271         struct ptlrpc_request   *req;
1272         int                      rc;
1273 
1274         req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_CT_UNREGISTER,
1275                                         LUSTRE_MDS_VERSION,
1276                                         MDS_HSM_CT_UNREGISTER);
1277         if (req == NULL)
1278                 GOTO(out, rc = -ENOMEM);
1279 
1280         mdc_pack_body(req, NULL, NULL, OBD_MD_FLRMTPERM, 0, 0, 0);
1281 
1282         ptlrpc_request_set_replen(req);
1283 
1284         rc = mdc_queue_wait(req);
1285         GOTO(out, rc);
1286 out:
1287         ptlrpc_req_finished(req);
1288         return rc;
1289 }
1290 
1291 static int mdc_ioc_hsm_state_get(struct obd_export *exp,
1292                                  struct md_op_data *op_data)
1293 {
1294         struct hsm_user_state   *hus = op_data->op_data;
1295         struct hsm_user_state   *req_hus;
1296         struct ptlrpc_request   *req;
1297         int                      rc;
1298 
1299         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
1300                                    &RQF_MDS_HSM_STATE_GET);
1301         if (req == NULL)
1302                 return -ENOMEM;
1303 
1304         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
1305 
1306         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_STATE_GET);
1307         if (rc != 0) {
1308                 ptlrpc_request_free(req);
1309                 return rc;
1310         }
1311 
1312         mdc_pack_body(req, &op_data->op_fid1, op_data->op_capa1,
1313                       OBD_MD_FLRMTPERM, 0, op_data->op_suppgids[0], 0);
1314 
1315         ptlrpc_request_set_replen(req);
1316 
1317         rc = mdc_queue_wait(req);
1318         if (rc)
1319                 GOTO(out, rc);
1320 
1321         req_hus = req_capsule_server_get(&req->rq_pill, &RMF_HSM_USER_STATE);
1322         if (req_hus == NULL)
1323                 GOTO(out, rc = -EPROTO);
1324 
1325         *hus = *req_hus;
1326 
1327 out:
1328         ptlrpc_req_finished(req);
1329         return rc;
1330 }
1331 
1332 static int mdc_ioc_hsm_state_set(struct obd_export *exp,
1333                                  struct md_op_data *op_data)
1334 {
1335         struct hsm_state_set    *hss = op_data->op_data;
1336         struct hsm_state_set    *req_hss;
1337         struct ptlrpc_request   *req;
1338         int                      rc;
1339 
1340         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
1341                                    &RQF_MDS_HSM_STATE_SET);
1342         if (req == NULL)
1343                 return -ENOMEM;
1344 
1345         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
1346 
1347         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_STATE_SET);
1348         if (rc) {
1349                 ptlrpc_request_free(req);
1350                 return rc;
1351         }
1352 
1353         mdc_pack_body(req, &op_data->op_fid1, op_data->op_capa1,
1354                       OBD_MD_FLRMTPERM, 0, op_data->op_suppgids[0], 0);
1355 
1356         /* Copy states */
1357         req_hss = req_capsule_client_get(&req->rq_pill, &RMF_HSM_STATE_SET);
1358         if (req_hss == NULL)
1359                 GOTO(out, rc = -EPROTO);
1360         *req_hss = *hss;
1361 
1362         ptlrpc_request_set_replen(req);
1363 
1364         rc = mdc_queue_wait(req);
1365         GOTO(out, rc);
1366 
1367 out:
1368         ptlrpc_req_finished(req);
1369         return rc;
1370 }
1371 
1372 static int mdc_ioc_hsm_request(struct obd_export *exp,
1373                                struct hsm_user_request *hur)
1374 {
1375         struct obd_import       *imp = class_exp2cliimp(exp);
1376         struct ptlrpc_request   *req;
1377         struct hsm_request      *req_hr;
1378         struct hsm_user_item    *req_hui;
1379         char                    *req_opaque;
1380         int                      rc;
1381 
1382         req = ptlrpc_request_alloc(imp, &RQF_MDS_HSM_REQUEST);
1383         if (req == NULL)
1384                 GOTO(out, rc = -ENOMEM);
1385 
1386         req_capsule_set_size(&req->rq_pill, &RMF_MDS_HSM_USER_ITEM, RCL_CLIENT,
1387                              hur->hur_request.hr_itemcount
1388                              * sizeof(struct hsm_user_item));
1389         req_capsule_set_size(&req->rq_pill, &RMF_GENERIC_DATA, RCL_CLIENT,
1390                              hur->hur_request.hr_data_len);
1391 
1392         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_REQUEST);
1393         if (rc) {
1394                 ptlrpc_request_free(req);
1395                 return rc;
1396         }
1397 
1398         mdc_pack_body(req, NULL, NULL, OBD_MD_FLRMTPERM, 0, 0, 0);
1399 
1400         /* Copy hsm_request struct */
1401         req_hr = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_REQUEST);
1402         if (req_hr == NULL)
1403                 GOTO(out, rc = -EPROTO);
1404         *req_hr = hur->hur_request;
1405 
1406         /* Copy hsm_user_item structs */
1407         req_hui = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_USER_ITEM);
1408         if (req_hui == NULL)
1409                 GOTO(out, rc = -EPROTO);
1410         memcpy(req_hui, hur->hur_user_item,
1411                hur->hur_request.hr_itemcount * sizeof(struct hsm_user_item));
1412 
1413         /* Copy opaque field */
1414         req_opaque = req_capsule_client_get(&req->rq_pill, &RMF_GENERIC_DATA);
1415         if (req_opaque == NULL)
1416                 GOTO(out, rc = -EPROTO);
1417         memcpy(req_opaque, hur_data(hur), hur->hur_request.hr_data_len);
1418 
1419         ptlrpc_request_set_replen(req);
1420 
1421         rc = mdc_queue_wait(req);
1422         GOTO(out, rc);
1423 
1424 out:
1425         ptlrpc_req_finished(req);
1426         return rc;
1427 }
1428 
1429 static struct kuc_hdr *changelog_kuc_hdr(char *buf, int len, int flags)
1430 {
1431         struct kuc_hdr *lh = (struct kuc_hdr *)buf;
1432 
1433         LASSERT(len <= KUC_CHANGELOG_MSG_MAXSIZE);
1434 
1435         lh->kuc_magic = KUC_MAGIC;
1436         lh->kuc_transport = KUC_TRANSPORT_CHANGELOG;
1437         lh->kuc_flags = flags;
1438         lh->kuc_msgtype = CL_RECORD;
1439         lh->kuc_msglen = len;
1440         return lh;
1441 }
1442 
1443 #define D_CHANGELOG 0
1444 
1445 struct changelog_show {
1446         __u64           cs_startrec;
1447         __u32           cs_flags;
1448         struct file     *cs_fp;
1449         char            *cs_buf;
1450         struct obd_device *cs_obd;
1451 };
1452 
1453 static int changelog_kkuc_cb(const struct lu_env *env, struct llog_handle *llh,
1454                              struct llog_rec_hdr *hdr, void *data)
1455 {
1456         struct changelog_show *cs = data;
1457         struct llog_changelog_rec *rec = (struct llog_changelog_rec *)hdr;
1458         struct kuc_hdr *lh;
1459         int len, rc;
1460 
1461         if (rec->cr_hdr.lrh_type != CHANGELOG_REC) {
1462                 rc = -EINVAL;
1463                 CERROR("%s: not a changelog rec %x/%d: rc = %d\n",
1464                        cs->cs_obd->obd_name, rec->cr_hdr.lrh_type,
1465                        rec->cr.cr_type, rc);
1466                 return rc;
1467         }
1468 
1469         if (rec->cr.cr_index < cs->cs_startrec) {
1470                 /* Skip entries earlier than what we are interested in */
1471                 CDEBUG(D_CHANGELOG, "rec="LPU64" start="LPU64"\n",
1472                        rec->cr.cr_index, cs->cs_startrec);
1473                 return 0;
1474         }
1475 
1476         CDEBUG(D_CHANGELOG, LPU64" %02d%-5s "LPU64" 0x%x t="DFID" p="DFID
1477                 " %.*s\n", rec->cr.cr_index, rec->cr.cr_type,
1478                 changelog_type2str(rec->cr.cr_type), rec->cr.cr_time,
1479                 rec->cr.cr_flags & CLF_FLAGMASK,
1480                 PFID(&rec->cr.cr_tfid), PFID(&rec->cr.cr_pfid),
1481                 rec->cr.cr_namelen, changelog_rec_name(&rec->cr));
1482 
1483         len = sizeof(*lh) + changelog_rec_size(&rec->cr) + rec->cr.cr_namelen;
1484 
1485         /* Set up the message */
1486         lh = changelog_kuc_hdr(cs->cs_buf, len, cs->cs_flags);
1487         memcpy(lh + 1, &rec->cr, len - sizeof(*lh));
1488 
1489         rc = libcfs_kkuc_msg_put(cs->cs_fp, lh);
1490         CDEBUG(D_CHANGELOG, "kucmsg fp %p len %d rc %d\n", cs->cs_fp, len,rc);
1491 
1492         return rc;
1493 }
1494 
1495 static int mdc_changelog_send_thread(void *csdata)
1496 {
1497         struct changelog_show *cs = csdata;
1498         struct llog_ctxt *ctxt = NULL;
1499         struct llog_handle *llh = NULL;
1500         struct kuc_hdr *kuch;
1501         int rc;
1502 
1503         CDEBUG(D_CHANGELOG, "changelog to fp=%p start "LPU64"\n",
1504                cs->cs_fp, cs->cs_startrec);
1505 
1506         OBD_ALLOC(cs->cs_buf, KUC_CHANGELOG_MSG_MAXSIZE);
1507         if (cs->cs_buf == NULL)
1508                 GOTO(out, rc = -ENOMEM);
1509 
1510         /* Set up the remote catalog handle */
1511         ctxt = llog_get_context(cs->cs_obd, LLOG_CHANGELOG_REPL_CTXT);
1512         if (ctxt == NULL)
1513                 GOTO(out, rc = -ENOENT);
1514         rc = llog_open(NULL, ctxt, &llh, NULL, CHANGELOG_CATALOG,
1515                        LLOG_OPEN_EXISTS);
1516         if (rc) {
1517                 CERROR("%s: fail to open changelog catalog: rc = %d\n",
1518                        cs->cs_obd->obd_name, rc);
1519                 GOTO(out, rc);
1520         }
1521         rc = llog_init_handle(NULL, llh, LLOG_F_IS_CAT, NULL);
1522         if (rc) {
1523                 CERROR("llog_init_handle failed %d\n", rc);
1524                 GOTO(out, rc);
1525         }
1526 
1527         rc = llog_cat_process(NULL, llh, changelog_kkuc_cb, cs, 0, 0);
1528 
1529         /* Send EOF no matter what our result */
1530         if ((kuch = changelog_kuc_hdr(cs->cs_buf, sizeof(*kuch),
1531                                       cs->cs_flags))) {
1532                 kuch->kuc_msgtype = CL_EOF;
1533                 libcfs_kkuc_msg_put(cs->cs_fp, kuch);
1534         }
1535 
1536 out:
1537         fput(cs->cs_fp);
1538         if (llh)
1539                 llog_cat_close(NULL, llh);
1540         if (ctxt)
1541                 llog_ctxt_put(ctxt);
1542         if (cs->cs_buf)
1543                 OBD_FREE(cs->cs_buf, KUC_CHANGELOG_MSG_MAXSIZE);
1544         OBD_FREE_PTR(cs);
1545         return rc;
1546 }
1547 
1548 static int mdc_ioc_changelog_send(struct obd_device *obd,
1549                                   struct ioc_changelog *icc)
1550 {
1551         struct changelog_show *cs;
1552         int rc;
1553 
1554         /* Freed in mdc_changelog_send_thread */
1555         OBD_ALLOC_PTR(cs);
1556         if (!cs)
1557                 return -ENOMEM;
1558 
1559         cs->cs_obd = obd;
1560         cs->cs_startrec = icc->icc_recno;
1561         /* matching fput in mdc_changelog_send_thread */
1562         cs->cs_fp = fget(icc->icc_id);
1563         cs->cs_flags = icc->icc_flags;
1564 
1565         /*
1566          * New thread because we should return to user app before
1567          * writing into our pipe
1568          */
1569         rc = PTR_ERR(kthread_run(mdc_changelog_send_thread, cs,
1570                                  "mdc_clg_send_thread"));
1571         if (!IS_ERR_VALUE(rc)) {
1572                 CDEBUG(D_CHANGELOG, "start changelog thread\n");
1573                 return 0;
1574         }
1575 
1576         CERROR("Failed to start changelog thread: %d\n", rc);
1577         OBD_FREE_PTR(cs);
1578         return rc;
1579 }
1580 
1581 static int mdc_ioc_hsm_ct_start(struct obd_export *exp,
1582                                 struct lustre_kernelcomm *lk);
1583 
1584 static int mdc_quotacheck(struct obd_device *unused, struct obd_export *exp,
1585                           struct obd_quotactl *oqctl)
1586 {
1587         struct client_obd       *cli = &exp->exp_obd->u.cli;
1588         struct ptlrpc_request   *req;
1589         struct obd_quotactl     *body;
1590         int                   rc;
1591 
1592         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
1593                                         &RQF_MDS_QUOTACHECK, LUSTRE_MDS_VERSION,
1594                                         MDS_QUOTACHECK);
1595         if (req == NULL)
1596                 return -ENOMEM;
1597 
1598         body = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1599         *body = *oqctl;
1600 
1601         ptlrpc_request_set_replen(req);
1602 
1603         /* the next poll will find -ENODATA, that means quotacheck is
1604          * going on */
1605         cli->cl_qchk_stat = -ENODATA;
1606         rc = ptlrpc_queue_wait(req);
1607         if (rc)
1608                 cli->cl_qchk_stat = rc;
1609         ptlrpc_req_finished(req);
1610         return rc;
1611 }
1612 
1613 static int mdc_quota_poll_check(struct obd_export *exp,
1614                                 struct if_quotacheck *qchk)
1615 {
1616         struct client_obd *cli = &exp->exp_obd->u.cli;
1617         int rc;
1618 
1619         qchk->obd_uuid = cli->cl_target_uuid;
1620         memcpy(qchk->obd_type, LUSTRE_MDS_NAME, strlen(LUSTRE_MDS_NAME));
1621 
1622         rc = cli->cl_qchk_stat;
1623         /* the client is not the previous one */
1624         if (rc == CL_NOT_QUOTACHECKED)
1625                 rc = -EINTR;
1626         return rc;
1627 }
1628 
1629 static int mdc_quotactl(struct obd_device *unused, struct obd_export *exp,
1630                         struct obd_quotactl *oqctl)
1631 {
1632         struct ptlrpc_request   *req;
1633         struct obd_quotactl     *oqc;
1634         int                   rc;
1635 
1636         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
1637                                         &RQF_MDS_QUOTACTL, LUSTRE_MDS_VERSION,
1638                                         MDS_QUOTACTL);
1639         if (req == NULL)
1640                 return -ENOMEM;
1641 
1642         oqc = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1643         *oqc = *oqctl;
1644 
1645         ptlrpc_request_set_replen(req);
1646         ptlrpc_at_set_req_timeout(req);
1647         req->rq_no_resend = 1;
1648 
1649         rc = ptlrpc_queue_wait(req);
1650         if (rc)
1651                 CERROR("ptlrpc_queue_wait failed, rc: %d\n", rc);
1652 
1653         if (req->rq_repmsg &&
1654             (oqc = req_capsule_server_get(&req->rq_pill, &RMF_OBD_QUOTACTL))) {
1655                 *oqctl = *oqc;
1656         } else if (!rc) {
1657                 CERROR ("Can't unpack obd_quotactl\n");
1658                 rc = -EPROTO;
1659         }
1660         ptlrpc_req_finished(req);
1661 
1662         return rc;
1663 }
1664 
1665 static int mdc_ioc_swap_layouts(struct obd_export *exp,
1666                                 struct md_op_data *op_data)
1667 {
1668         LIST_HEAD(cancels);
1669         struct ptlrpc_request   *req;
1670         int                      rc, count;
1671         struct mdc_swap_layouts *msl, *payload;
1672 
1673         msl = op_data->op_data;
1674 
1675         /* When the MDT will get the MDS_SWAP_LAYOUTS RPC the
1676          * first thing it will do is to cancel the 2 layout
1677          * locks hold by this client.
1678          * So the client must cancel its layout locks on the 2 fids
1679          * with the request RPC to avoid extra RPC round trips
1680          */
1681         count = mdc_resource_get_unused(exp, &op_data->op_fid1, &cancels,
1682                                         LCK_CR, MDS_INODELOCK_LAYOUT);
1683         count += mdc_resource_get_unused(exp, &op_data->op_fid2, &cancels,
1684                                          LCK_CR, MDS_INODELOCK_LAYOUT);
1685 
1686         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
1687                                    &RQF_MDS_SWAP_LAYOUTS);
1688         if (req == NULL) {
1689                 ldlm_lock_list_put(&cancels, l_bl_ast, count);
1690                 return -ENOMEM;
1691         }
1692 
1693         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
1694         mdc_set_capa_size(req, &RMF_CAPA2, op_data->op_capa2);
1695 
1696         rc = mdc_prep_elc_req(exp, req, MDS_SWAP_LAYOUTS, &cancels, count);
1697         if (rc) {
1698                 ptlrpc_request_free(req);
1699                 return rc;
1700         }
1701 
1702         mdc_swap_layouts_pack(req, op_data);
1703 
1704         payload = req_capsule_client_get(&req->rq_pill, &RMF_SWAP_LAYOUTS);
1705         LASSERT(payload);
1706 
1707         *payload = *msl;
1708 
1709         ptlrpc_request_set_replen(req);
1710 
1711         rc = ptlrpc_queue_wait(req);
1712         if (rc)
1713                 GOTO(out, rc);
1714 
1715 out:
1716         ptlrpc_req_finished(req);
1717         return rc;
1718 }
1719 
1720 static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1721                          void *karg, void *uarg)
1722 {
1723         struct obd_device *obd = exp->exp_obd;
1724         struct obd_ioctl_data *data = karg;
1725         struct obd_import *imp = obd->u.cli.cl_import;
1726         struct llog_ctxt *ctxt;
1727         int rc;
1728 
1729         if (!try_module_get(THIS_MODULE)) {
1730                 CERROR("Can't get module. Is it alive?");
1731                 return -EINVAL;
1732         }
1733         switch (cmd) {
1734         case OBD_IOC_CHANGELOG_SEND:
1735                 rc = mdc_ioc_changelog_send(obd, karg);
1736                 GOTO(out, rc);
1737         case OBD_IOC_CHANGELOG_CLEAR: {
1738                 struct ioc_changelog *icc = karg;
1739                 struct changelog_setinfo cs =
1740                         {.cs_recno = icc->icc_recno, .cs_id = icc->icc_id};
1741                 rc = obd_set_info_async(NULL, exp, strlen(KEY_CHANGELOG_CLEAR),
1742                                         KEY_CHANGELOG_CLEAR, sizeof(cs), &cs,
1743                                         NULL);
1744                 GOTO(out, rc);
1745         }
1746         case OBD_IOC_FID2PATH:
1747                 rc = mdc_ioc_fid2path(exp, karg);
1748                 GOTO(out, rc);
1749         case LL_IOC_HSM_CT_START:
1750                 rc = mdc_ioc_hsm_ct_start(exp, karg);
1751                 /* ignore if it was already registered on this MDS. */
1752                 if (rc == -EEXIST)
1753                         rc = 0;
1754                 GOTO(out, rc);
1755         case LL_IOC_HSM_PROGRESS:
1756                 rc = mdc_ioc_hsm_progress(exp, karg);
1757                 GOTO(out, rc);
1758         case LL_IOC_HSM_STATE_GET:
1759                 rc = mdc_ioc_hsm_state_get(exp, karg);
1760                 GOTO(out, rc);
1761         case LL_IOC_HSM_STATE_SET:
1762                 rc = mdc_ioc_hsm_state_set(exp, karg);
1763                 GOTO(out, rc);
1764         case LL_IOC_HSM_ACTION:
1765                 rc = mdc_ioc_hsm_current_action(exp, karg);
1766                 GOTO(out, rc);
1767         case LL_IOC_HSM_REQUEST:
1768                 rc = mdc_ioc_hsm_request(exp, karg);
1769                 GOTO(out, rc);
1770         case OBD_IOC_CLIENT_RECOVER:
1771                 rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1, 0);
1772                 if (rc < 0)
1773                         GOTO(out, rc);
1774                 GOTO(out, rc = 0);
1775         case IOC_OSC_SET_ACTIVE:
1776                 rc = ptlrpc_set_import_active(imp, data->ioc_offset);
1777                 GOTO(out, rc);
1778         case OBD_IOC_PARSE: {
1779                 ctxt = llog_get_context(exp->exp_obd, LLOG_CONFIG_REPL_CTXT);
1780                 rc = class_config_parse_llog(NULL, ctxt, data->ioc_inlbuf1,
1781                                              NULL);
1782                 llog_ctxt_put(ctxt);
1783                 GOTO(out, rc);
1784         }
1785         case OBD_IOC_LLOG_INFO:
1786         case OBD_IOC_LLOG_PRINT: {
1787                 ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT);
1788                 rc = llog_ioctl(NULL, ctxt, cmd, data);
1789                 llog_ctxt_put(ctxt);
1790                 GOTO(out, rc);
1791         }
1792         case OBD_IOC_POLL_QUOTACHECK:
1793                 rc = mdc_quota_poll_check(exp, (struct if_quotacheck *)karg);
1794                 GOTO(out, rc);
1795         case OBD_IOC_PING_TARGET:
1796                 rc = ptlrpc_obd_ping(obd);
1797                 GOTO(out, rc);
1798         /*
1799          * Normally IOC_OBD_STATFS, OBD_IOC_QUOTACTL iocontrol are handled by
1800          * LMV instead of MDC. But when the cluster is upgraded from 1.8,
1801          * there'd be no LMV layer thus we might be called here. Eventually
1802          * this code should be removed.
1803          * bz20731, LU-592.
1804          */
1805         case IOC_OBD_STATFS: {
1806                 struct obd_statfs stat_buf = {0};
1807 
1808                 if (*((__u32 *) data->ioc_inlbuf2) != 0)
1809                         GOTO(out, rc = -ENODEV);
1810 
1811                 /* copy UUID */
1812                 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(obd),
1813                                      min((int) data->ioc_plen2,
1814                                          (int) sizeof(struct obd_uuid))))
1815                         GOTO(out, rc = -EFAULT);
1816 
1817                 rc = mdc_statfs(NULL, obd->obd_self_export, &stat_buf,
1818                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1819                                 0);
1820                 if (rc != 0)
1821                         GOTO(out, rc);
1822 
1823                 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
1824                                      min((int) data->ioc_plen1,
1825                                          (int) sizeof(stat_buf))))
1826                         GOTO(out, rc = -EFAULT);
1827 
1828                 GOTO(out, rc = 0);
1829         }
1830         case OBD_IOC_QUOTACTL: {
1831                 struct if_quotactl *qctl = karg;
1832                 struct obd_quotactl *oqctl;
1833 
1834                 OBD_ALLOC_PTR(oqctl);
1835                 if (oqctl == NULL)
1836                         GOTO(out, rc = -ENOMEM);
1837 
1838                 QCTL_COPY(oqctl, qctl);
1839                 rc = obd_quotactl(exp, oqctl);
1840                 if (rc == 0) {
1841                         QCTL_COPY(qctl, oqctl);
1842                         qctl->qc_valid = QC_MDTIDX;
1843                         qctl->obd_uuid = obd->u.cli.cl_target_uuid;
1844                 }
1845 
1846                 OBD_FREE_PTR(oqctl);
1847                 GOTO(out, rc);
1848         }
1849         case LL_IOC_GET_CONNECT_FLAGS:
1850                 if (copy_to_user(uarg, exp_connect_flags_ptr(exp),
1851                                  sizeof(*exp_connect_flags_ptr(exp))))
1852                         GOTO(out, rc = -EFAULT);
1853 
1854                 GOTO(out, rc = 0);
1855         case LL_IOC_LOV_SWAP_LAYOUTS:
1856                 rc = mdc_ioc_swap_layouts(exp, karg);
1857                 GOTO(out, rc);
1858         default:
1859                 CERROR("unrecognised ioctl: cmd = %#x\n", cmd);
1860                 GOTO(out, rc = -ENOTTY);
1861         }
1862 out:
1863         module_put(THIS_MODULE);
1864 
1865         return rc;
1866 }
1867 
1868 int mdc_get_info_rpc(struct obd_export *exp,
1869                      obd_count keylen, void *key,
1870                      int vallen, void *val)
1871 {
1872         struct obd_import      *imp = class_exp2cliimp(exp);
1873         struct ptlrpc_request  *req;
1874         char               *tmp;
1875         int                  rc = -EINVAL;
1876 
1877         req = ptlrpc_request_alloc(imp, &RQF_MDS_GET_INFO);
1878         if (req == NULL)
1879                 return -ENOMEM;
1880 
1881         req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_KEY,
1882                              RCL_CLIENT, keylen);
1883         req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_VALLEN,
1884                              RCL_CLIENT, sizeof(__u32));
1885 
1886         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GET_INFO);
1887         if (rc) {
1888                 ptlrpc_request_free(req);
1889                 return rc;
1890         }
1891 
1892         tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_KEY);
1893         memcpy(tmp, key, keylen);
1894         tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_VALLEN);
1895         memcpy(tmp, &vallen, sizeof(__u32));
1896 
1897         req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_VAL,
1898                              RCL_SERVER, vallen);
1899         ptlrpc_request_set_replen(req);
1900 
1901         rc = ptlrpc_queue_wait(req);
1902         /* -EREMOTE means the get_info result is partial, and it needs to
1903          * continue on another MDT, see fid2path part in lmv_iocontrol */
1904         if (rc == 0 || rc == -EREMOTE) {
1905                 tmp = req_capsule_server_get(&req->rq_pill, &RMF_GETINFO_VAL);
1906                 memcpy(val, tmp, vallen);
1907                 if (ptlrpc_rep_need_swab(req)) {
1908                         if (KEY_IS(KEY_FID2PATH))
1909                                 lustre_swab_fid2path(val);
1910                 }
1911         }
1912         ptlrpc_req_finished(req);
1913 
1914         return rc;
1915 }
1916 
1917 static void lustre_swab_hai(struct hsm_action_item *h)
1918 {
1919         __swab32s(&h->hai_len);
1920         __swab32s(&h->hai_action);
1921         lustre_swab_lu_fid(&h->hai_fid);
1922         lustre_swab_lu_fid(&h->hai_dfid);
1923         __swab64s(&h->hai_cookie);
1924         __swab64s(&h->hai_extent.offset);
1925         __swab64s(&h->hai_extent.length);
1926         __swab64s(&h->hai_gid);
1927 }
1928 
1929 static void lustre_swab_hal(struct hsm_action_list *h)
1930 {
1931         struct hsm_action_item  *hai;
1932         int                      i;
1933 
1934         __swab32s(&h->hal_version);
1935         __swab32s(&h->hal_count);
1936         __swab32s(&h->hal_archive_id);
1937         __swab64s(&h->hal_flags);
1938         hai = hai_zero(h);
1939         for (i = 0; i < h->hal_count; i++, hai = hai_next(hai))
1940                 lustre_swab_hai(hai);
1941 }
1942 
1943 static void lustre_swab_kuch(struct kuc_hdr *l)
1944 {
1945         __swab16s(&l->kuc_magic);
1946         /* __u8 l->kuc_transport */
1947         __swab16s(&l->kuc_msgtype);
1948         __swab16s(&l->kuc_msglen);
1949 }
1950 
1951 static int mdc_ioc_hsm_ct_start(struct obd_export *exp,
1952                                 struct lustre_kernelcomm *lk)
1953 {
1954         struct obd_import  *imp = class_exp2cliimp(exp);
1955         __u32               archive = lk->lk_data;
1956         int                 rc = 0;
1957 
1958         if (lk->lk_group != KUC_GRP_HSM) {
1959                 CERROR("Bad copytool group %d\n", lk->lk_group);
1960                 return -EINVAL;
1961         }
1962 
1963         CDEBUG(D_HSM, "CT start r%d w%d u%d g%d f%#x\n", lk->lk_rfd, lk->lk_wfd,
1964                lk->lk_uid, lk->lk_group, lk->lk_flags);
1965 
1966         if (lk->lk_flags & LK_FLG_STOP) {
1967                 /* Unregister with the coordinator */
1968                 rc = mdc_ioc_hsm_ct_unregister(imp);
1969         } else {
1970                 rc = mdc_ioc_hsm_ct_register(imp, archive);
1971         }
1972 
1973         return rc;
1974 }
1975 
1976 /**
1977  * Send a message to any listening copytools
1978  * @param val KUC message (kuc_hdr + hsm_action_list)
1979  * @param len total length of message
1980  */
1981 static int mdc_hsm_copytool_send(int len, void *val)
1982 {
1983         struct kuc_hdr          *lh = (struct kuc_hdr *)val;
1984         struct hsm_action_list  *hal = (struct hsm_action_list *)(lh + 1);
1985         int                      rc;
1986 
1987         if (len < sizeof(*lh) + sizeof(*hal)) {
1988                 CERROR("Short HSM message %d < %d\n", len,
1989                        (int) (sizeof(*lh) + sizeof(*hal)));
1990                 return -EPROTO;
1991         }
1992         if (lh->kuc_magic == __swab16(KUC_MAGIC)) {
1993                 lustre_swab_kuch(lh);
1994                 lustre_swab_hal(hal);
1995         } else if (lh->kuc_magic != KUC_MAGIC) {
1996                 CERROR("Bad magic %x!=%x\n", lh->kuc_magic, KUC_MAGIC);
1997                 return -EPROTO;
1998         }
1999 
2000         CDEBUG(D_HSM, " Received message mg=%x t=%d m=%d l=%d actions=%d "
2001                "on %s\n",
2002                lh->kuc_magic, lh->kuc_transport, lh->kuc_msgtype,
2003                lh->kuc_msglen, hal->hal_count, hal->hal_fsname);
2004 
2005         /* Broadcast to HSM listeners */
2006         rc = libcfs_kkuc_group_put(KUC_GRP_HSM, lh);
2007 
2008         return rc;
2009 }
2010 
2011 /**
2012  * callback function passed to kuc for re-registering each HSM copytool
2013  * running on MDC, after MDT shutdown/recovery.
2014  * @param data archive id served by the copytool
2015  * @param cb_arg callback argument (obd_import)
2016  */
2017 static int mdc_hsm_ct_reregister(__u32 data, void *cb_arg)
2018 {
2019         struct obd_import       *imp = (struct obd_import *)cb_arg;
2020         __u32                    archive = data;
2021         int                      rc;
2022 
2023         CDEBUG(D_HA, "recover copytool registration to MDT (archive=%#x)\n",
2024                archive);
2025         rc = mdc_ioc_hsm_ct_register(imp, archive);
2026 
2027         /* ignore error if the copytool is already registered */
2028         return ((rc != 0) && (rc != -EEXIST)) ? rc : 0;
2029 }
2030 
2031 /**
2032  * Re-establish all kuc contexts with MDT
2033  * after MDT shutdown/recovery.
2034  */
2035 static int mdc_kuc_reregister(struct obd_import *imp)
2036 {
2037         /* re-register HSM agents */
2038         return libcfs_kkuc_group_foreach(KUC_GRP_HSM, mdc_hsm_ct_reregister,
2039                                          (void *)imp);
2040 }
2041 
2042 int mdc_set_info_async(const struct lu_env *env,
2043                        struct obd_export *exp,
2044                        obd_count keylen, void *key,
2045                        obd_count vallen, void *val,
2046                        struct ptlrpc_request_set *set)
2047 {
2048         struct obd_import       *imp = class_exp2cliimp(exp);
2049         int                      rc;
2050 
2051         if (KEY_IS(KEY_READ_ONLY)) {
2052                 if (vallen != sizeof(int))
2053                         return -EINVAL;
2054 
2055                 spin_lock(&imp->imp_lock);
2056                 if (*((int *)val)) {
2057                         imp->imp_connect_flags_orig |= OBD_CONNECT_RDONLY;
2058                         imp->imp_connect_data.ocd_connect_flags |=
2059                                                         OBD_CONNECT_RDONLY;
2060                 } else {
2061                         imp->imp_connect_flags_orig &= ~OBD_CONNECT_RDONLY;
2062                         imp->imp_connect_data.ocd_connect_flags &=
2063                                                         ~OBD_CONNECT_RDONLY;
2064                 }
2065                 spin_unlock(&imp->imp_lock);
2066 
2067                 rc = do_set_info_async(imp, MDS_SET_INFO, LUSTRE_MDS_VERSION,
2068                                        keylen, key, vallen, val, set);
2069                 return rc;
2070         }
2071         if (KEY_IS(KEY_SPTLRPC_CONF)) {
2072                 sptlrpc_conf_client_adapt(exp->exp_obd);
2073                 return 0;
2074         }
2075         if (KEY_IS(KEY_FLUSH_CTX)) {
2076                 sptlrpc_import_flush_my_ctx(imp);
2077                 return 0;
2078         }
2079         if (KEY_IS(KEY_CHANGELOG_CLEAR)) {
2080                 rc = do_set_info_async(imp, MDS_SET_INFO, LUSTRE_MDS_VERSION,
2081                                        keylen, key, vallen, val, set);
2082                 return rc;
2083         }
2084         if (KEY_IS(KEY_HSM_COPYTOOL_SEND)) {
2085                 rc = mdc_hsm_copytool_send(vallen, val);
2086                 return rc;
2087         }
2088 
2089         CERROR("Unknown key %s\n", (char *)key);
2090         return -EINVAL;
2091 }
2092 
2093 int mdc_get_info(const struct lu_env *env, struct obd_export *exp,
2094                  __u32 keylen, void *key, __u32 *vallen, void *val,
2095                  struct lov_stripe_md *lsm)
2096 {
2097         int rc = -EINVAL;
2098 
2099         if (KEY_IS(KEY_MAX_EASIZE)) {
2100                 int mdsize, *max_easize;
2101 
2102                 if (*vallen != sizeof(int))
2103                         return -EINVAL;
2104                 mdsize = *(int*)val;
2105                 if (mdsize > exp->exp_obd->u.cli.cl_max_mds_easize)
2106                         exp->exp_obd->u.cli.cl_max_mds_easize = mdsize;
2107                 max_easize = val;
2108                 *max_easize = exp->exp_obd->u.cli.cl_max_mds_easize;
2109                 return 0;
2110         } else if (KEY_IS(KEY_CONN_DATA)) {
2111                 struct obd_import *imp = class_exp2cliimp(exp);
2112                 struct obd_connect_data *data = val;
2113 
2114                 if (*vallen != sizeof(*data))
2115                         return -EINVAL;
2116 
2117                 *data = imp->imp_connect_data;
2118                 return 0;
2119         } else if (KEY_IS(KEY_TGT_COUNT)) {
2120                 *((int *)val) = 1;
2121                 return 0;
2122         }
2123 
2124         rc = mdc_get_info_rpc(exp, keylen, key, *vallen, val);
2125 
2126         return rc;
2127 }
2128 
2129 static int mdc_pin(struct obd_export *exp, const struct lu_fid *fid,
2130                    struct obd_capa *oc, struct obd_client_handle *handle,
2131                    int flags)
2132 {
2133         struct ptlrpc_request *req;
2134         struct mdt_body       *body;
2135         int                 rc;
2136 
2137         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_PIN);
2138         if (req == NULL)
2139                 return -ENOMEM;
2140 
2141         mdc_set_capa_size(req, &RMF_CAPA1, oc);
2142 
2143         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_PIN);
2144         if (rc) {
2145                 ptlrpc_request_free(req);
2146                 return rc;
2147         }
2148 
2149         mdc_pack_body(req, fid, oc, 0, 0, -1, flags);
2150 
2151         ptlrpc_request_set_replen(req);
2152 
2153         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
2154         rc = ptlrpc_queue_wait(req);
2155         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
2156         if (rc) {
2157                 CERROR("Pin failed: %d\n", rc);
2158                 GOTO(err_out, rc);
2159         }
2160 
2161         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2162         if (body == NULL)
2163                 GOTO(err_out, rc = -EPROTO);
2164 
2165         handle->och_fh = body->handle;
2166         handle->och_magic = OBD_CLIENT_HANDLE_MAGIC;
2167 
2168         handle->och_mod = obd_mod_alloc();
2169         if (handle->och_mod == NULL) {
2170                 DEBUG_REQ(D_ERROR, req, "can't allocate md_open_data");
2171                 GOTO(err_out, rc = -ENOMEM);
2172         }
2173         handle->och_mod->mod_open_req = req; /* will be dropped by unpin */
2174 
2175         return 0;
2176 
2177 err_out:
2178         ptlrpc_req_finished(req);
2179         return rc;
2180 }
2181 
2182 static int mdc_unpin(struct obd_export *exp, struct obd_client_handle *handle,
2183                      int flag)
2184 {
2185         struct ptlrpc_request *req;
2186         struct mdt_body       *body;
2187         int                 rc;
2188 
2189         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_MDS_UNPIN,
2190                                         LUSTRE_MDS_VERSION, MDS_UNPIN);
2191         if (req == NULL)
2192                 return -ENOMEM;
2193 
2194         body = req_capsule_client_get(&req->rq_pill, &RMF_MDT_BODY);
2195         body->handle = handle->och_fh;
2196         body->flags = flag;
2197 
2198         ptlrpc_request_set_replen(req);
2199 
2200         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
2201         rc = ptlrpc_queue_wait(req);
2202         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
2203 
2204         if (rc != 0)
2205                 CERROR("Unpin failed: %d\n", rc);
2206 
2207         ptlrpc_req_finished(req);
2208         ptlrpc_req_finished(handle->och_mod->mod_open_req);
2209 
2210         obd_mod_put(handle->och_mod);
2211         return rc;
2212 }
2213 
2214 int mdc_sync(struct obd_export *exp, const struct lu_fid *fid,
2215              struct obd_capa *oc, struct ptlrpc_request **request)
2216 {
2217         struct ptlrpc_request *req;
2218         int                 rc;
2219 
2220         *request = NULL;
2221         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_SYNC);
2222         if (req == NULL)
2223                 return -ENOMEM;
2224 
2225         mdc_set_capa_size(req, &RMF_CAPA1, oc);
2226 
2227         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SYNC);
2228         if (rc) {
2229                 ptlrpc_request_free(req);
2230                 return rc;
2231         }
2232 
2233         mdc_pack_body(req, fid, oc, 0, 0, -1, 0);
2234 
2235         ptlrpc_request_set_replen(req);
2236 
2237         rc = ptlrpc_queue_wait(req);
2238         if (rc)
2239                 ptlrpc_req_finished(req);
2240         else
2241                 *request = req;
2242         return rc;
2243 }
2244 
2245 static int mdc_import_event(struct obd_device *obd, struct obd_import *imp,
2246                             enum obd_import_event event)
2247 {
2248         int rc = 0;
2249 
2250         LASSERT(imp->imp_obd == obd);
2251 
2252         switch (event) {
2253         case IMP_EVENT_DISCON: {
2254 #if 0
2255                 /* XXX Pass event up to OBDs stack. used only for FLD now */
2256                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DISCON, NULL);
2257 #endif
2258                 break;
2259         }
2260         case IMP_EVENT_INACTIVE: {
2261                 struct client_obd *cli = &obd->u.cli;
2262                 /*
2263                  * Flush current sequence to make client obtain new one
2264                  * from server in case of disconnect/reconnect.
2265                  */
2266                 if (cli->cl_seq != NULL)
2267                         seq_client_flush(cli->cl_seq);
2268 
2269                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
2270                 break;
2271         }
2272         case IMP_EVENT_INVALIDATE: {
2273                 struct ldlm_namespace *ns = obd->obd_namespace;
2274 
2275                 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
2276 
2277                 break;
2278         }
2279         case IMP_EVENT_ACTIVE:
2280                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
2281                 /* redo the kuc registration after reconnecting */
2282                 if (rc == 0)
2283                         rc = mdc_kuc_reregister(imp);
2284                 break;
2285         case IMP_EVENT_OCD:
2286                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
2287                 break;
2288         case IMP_EVENT_DEACTIVATE:
2289         case IMP_EVENT_ACTIVATE:
2290                 break;
2291         default:
2292                 CERROR("Unknown import event %x\n", event);
2293                 LBUG();
2294         }
2295         return rc;
2296 }
2297 
2298 int mdc_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
2299                   struct md_op_data *op_data)
2300 {
2301         struct client_obd *cli = &exp->exp_obd->u.cli;
2302         struct lu_client_seq *seq = cli->cl_seq;
2303 
2304         return seq_client_alloc_fid(NULL, seq, fid);
2305 }
2306 
2307 struct obd_uuid *mdc_get_uuid(struct obd_export *exp) {
2308         struct client_obd *cli = &exp->exp_obd->u.cli;
2309         return &cli->cl_target_uuid;
2310 }
2311 
2312 /**
2313  * Determine whether the lock can be canceled before replaying it during
2314  * recovery, non zero value will be return if the lock can be canceled,
2315  * or zero returned for not
2316  */
2317 static int mdc_cancel_for_recovery(struct ldlm_lock *lock)
2318 {
2319         if (lock->l_resource->lr_type != LDLM_IBITS)
2320                 return 0;
2321 
2322         /* FIXME: if we ever get into a situation where there are too many
2323          * opened files with open locks on a single node, then we really
2324          * should replay these open locks to reget it */
2325         if (lock->l_policy_data.l_inodebits.bits & MDS_INODELOCK_OPEN)
2326                 return 0;
2327 
2328         return 1;
2329 }
2330 
2331 static int mdc_resource_inode_free(struct ldlm_resource *res)
2332 {
2333         if (res->lr_lvb_inode)
2334                 res->lr_lvb_inode = NULL;
2335 
2336         return 0;
2337 }
2338 
2339 struct ldlm_valblock_ops inode_lvbo = {
2340         .lvbo_free = mdc_resource_inode_free,
2341 };
2342 
2343 static int mdc_setup(struct obd_device *obd, struct lustre_cfg *cfg)
2344 {
2345         struct client_obd *cli = &obd->u.cli;
2346         struct lprocfs_static_vars lvars = { 0 };
2347         int rc;
2348 
2349         OBD_ALLOC(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
2350         if (!cli->cl_rpc_lock)
2351                 return -ENOMEM;
2352         mdc_init_rpc_lock(cli->cl_rpc_lock);
2353 
2354         ptlrpcd_addref();
2355 
2356         OBD_ALLOC(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
2357         if (!cli->cl_close_lock)
2358                 GOTO(err_rpc_lock, rc = -ENOMEM);
2359         mdc_init_rpc_lock(cli->cl_close_lock);
2360 
2361         rc = client_obd_setup(obd, cfg);
2362         if (rc)
2363                 GOTO(err_close_lock, rc);
2364         lprocfs_mdc_init_vars(&lvars);
2365         lprocfs_obd_setup(obd, lvars.obd_vars);
2366         sptlrpc_lprocfs_cliobd_attach(obd);
2367         ptlrpc_lprocfs_register_obd(obd);
2368 
2369         ns_register_cancel(obd->obd_namespace, mdc_cancel_for_recovery);
2370 
2371         obd->obd_namespace->ns_lvbo = &inode_lvbo;
2372 
2373         rc = obd_llog_init(obd, &obd->obd_olg, obd, NULL);
2374         if (rc) {
2375                 mdc_cleanup(obd);
2376                 CERROR("failed to setup llogging subsystems\n");
2377         }
2378 
2379         return rc;
2380 
2381 err_close_lock:
2382         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
2383 err_rpc_lock:
2384         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
2385         ptlrpcd_decref();
2386         return rc;
2387 }
2388 
2389 /* Initialize the default and maximum LOV EA and cookie sizes.  This allows
2390  * us to make MDS RPCs with large enough reply buffers to hold the
2391  * maximum-sized (= maximum striped) EA and cookie without having to
2392  * calculate this (via a call into the LOV + OSCs) each time we make an RPC. */
2393 static int mdc_init_ea_size(struct obd_export *exp, int easize,
2394                      int def_easize, int cookiesize)
2395 {
2396         struct obd_device *obd = exp->exp_obd;
2397         struct client_obd *cli = &obd->u.cli;
2398 
2399         if (cli->cl_max_mds_easize < easize)
2400                 cli->cl_max_mds_easize = easize;
2401 
2402         if (cli->cl_default_mds_easize < def_easize)
2403                 cli->cl_default_mds_easize = def_easize;
2404 
2405         if (cli->cl_max_mds_cookiesize < cookiesize)
2406                 cli->cl_max_mds_cookiesize = cookiesize;
2407 
2408         return 0;
2409 }
2410 
2411 static int mdc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
2412 {
2413         int rc = 0;
2414 
2415         switch (stage) {
2416         case OBD_CLEANUP_EARLY:
2417                 break;
2418         case OBD_CLEANUP_EXPORTS:
2419                 /* Failsafe, ok if racy */
2420                 if (obd->obd_type->typ_refcnt <= 1)
2421                         libcfs_kkuc_group_rem(0, KUC_GRP_HSM);
2422 
2423                 obd_cleanup_client_import(obd);
2424                 ptlrpc_lprocfs_unregister_obd(obd);
2425                 lprocfs_obd_cleanup(obd);
2426 
2427                 rc = obd_llog_finish(obd, 0);
2428                 if (rc != 0)
2429                         CERROR("failed to cleanup llogging subsystems\n");
2430                 break;
2431         }
2432         return rc;
2433 }
2434 
2435 static int mdc_cleanup(struct obd_device *obd)
2436 {
2437         struct client_obd *cli = &obd->u.cli;
2438 
2439         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
2440         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
2441 
2442         ptlrpcd_decref();
2443 
2444         return client_obd_cleanup(obd);
2445 }
2446 
2447 
2448 static int mdc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
2449                          struct obd_device *tgt, int *index)
2450 {
2451         struct llog_ctxt        *ctxt;
2452         int                      rc;
2453 
2454         LASSERT(olg == &obd->obd_olg);
2455 
2456         rc = llog_setup(NULL, obd, olg, LLOG_CHANGELOG_REPL_CTXT, tgt,
2457                         &llog_client_ops);
2458         if (rc)
2459                 return rc;
2460 
2461         ctxt = llog_group_get_ctxt(olg, LLOG_CHANGELOG_REPL_CTXT);
2462         llog_initiator_connect(ctxt);
2463         llog_ctxt_put(ctxt);
2464 
2465         return 0;
2466 }
2467 
2468 static int mdc_llog_finish(struct obd_device *obd, int count)
2469 {
2470         struct llog_ctxt *ctxt;
2471 
2472         ctxt = llog_get_context(obd, LLOG_CHANGELOG_REPL_CTXT);
2473         if (ctxt)
2474                 llog_cleanup(NULL, ctxt);
2475 
2476         return 0;
2477 }
2478 
2479 static int mdc_process_config(struct obd_device *obd, obd_count len, void *buf)
2480 {
2481         struct lustre_cfg *lcfg = buf;
2482         struct lprocfs_static_vars lvars = { 0 };
2483         int rc = 0;
2484 
2485         lprocfs_mdc_init_vars(&lvars);
2486         switch (lcfg->lcfg_command) {
2487         default:
2488                 rc = class_process_proc_param(PARAM_MDC, lvars.obd_vars,
2489                                               lcfg, obd);
2490                 if (rc > 0)
2491                         rc = 0;
2492                 break;
2493         }
2494         return(rc);
2495 }
2496 
2497 
2498 /* get remote permission for current user on fid */
2499 int mdc_get_remote_perm(struct obd_export *exp, const struct lu_fid *fid,
2500                         struct obd_capa *oc, __u32 suppgid,
2501                         struct ptlrpc_request **request)
2502 {
2503         struct ptlrpc_request  *req;
2504         int                 rc;
2505 
2506         LASSERT(client_is_remote(exp));
2507 
2508         *request = NULL;
2509         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
2510         if (req == NULL)
2511                 return -ENOMEM;
2512 
2513         mdc_set_capa_size(req, &RMF_CAPA1, oc);
2514 
2515         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
2516         if (rc) {
2517                 ptlrpc_request_free(req);
2518                 return rc;
2519         }
2520 
2521         mdc_pack_body(req, fid, oc, OBD_MD_FLRMTPERM, 0, suppgid, 0);
2522 
2523         req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
2524                              sizeof(struct mdt_remote_perm));
2525 
2526         ptlrpc_request_set_replen(req);
2527 
2528         rc = ptlrpc_queue_wait(req);
2529         if (rc)
2530                 ptlrpc_req_finished(req);
2531         else
2532                 *request = req;
2533         return rc;
2534 }
2535 
2536 static int mdc_interpret_renew_capa(const struct lu_env *env,
2537                                     struct ptlrpc_request *req, void *args,
2538                                     int status)
2539 {
2540         struct mdc_renew_capa_args *ra = args;
2541         struct mdt_body *body = NULL;
2542         struct lustre_capa *capa;
2543 
2544         if (status)
2545                 GOTO(out, capa = ERR_PTR(status));
2546 
2547         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2548         if (body == NULL)
2549                 GOTO(out, capa = ERR_PTR(-EFAULT));
2550 
2551         if ((body->valid & OBD_MD_FLOSSCAPA) == 0)
2552                 GOTO(out, capa = ERR_PTR(-ENOENT));
2553 
2554         capa = req_capsule_server_get(&req->rq_pill, &RMF_CAPA2);
2555         if (!capa)
2556                 GOTO(out, capa = ERR_PTR(-EFAULT));
2557 out:
2558         ra->ra_cb(ra->ra_oc, capa);
2559         return 0;
2560 }
2561 
2562 static int mdc_renew_capa(struct obd_export *exp, struct obd_capa *oc,
2563                           renew_capa_cb_t cb)
2564 {
2565         struct ptlrpc_request *req;
2566         struct mdc_renew_capa_args *ra;
2567 
2568         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_MDS_GETATTR,
2569                                         LUSTRE_MDS_VERSION, MDS_GETATTR);
2570         if (req == NULL)
2571                 return -ENOMEM;
2572 
2573         /* NB, OBD_MD_FLOSSCAPA is set here, but it doesn't necessarily mean the
2574          * capa to renew is oss capa.
2575          */
2576         mdc_pack_body(req, &oc->c_capa.lc_fid, oc, OBD_MD_FLOSSCAPA, 0, -1, 0);
2577         ptlrpc_request_set_replen(req);
2578 
2579         CLASSERT(sizeof(*ra) <= sizeof(req->rq_async_args));
2580         ra = ptlrpc_req_async_args(req);
2581         ra->ra_oc = oc;
2582         ra->ra_cb = cb;
2583         req->rq_interpret_reply = mdc_interpret_renew_capa;
2584         ptlrpcd_add_req(req, PDL_POLICY_LOCAL, -1);
2585         return 0;
2586 }
2587 
2588 struct obd_ops mdc_obd_ops = {
2589         .o_owner            = THIS_MODULE,
2590         .o_setup            = mdc_setup,
2591         .o_precleanup       = mdc_precleanup,
2592         .o_cleanup        = mdc_cleanup,
2593         .o_add_conn      = client_import_add_conn,
2594         .o_del_conn      = client_import_del_conn,
2595         .o_connect          = client_connect_import,
2596         .o_disconnect       = client_disconnect_export,
2597         .o_iocontrol    = mdc_iocontrol,
2598         .o_set_info_async   = mdc_set_info_async,
2599         .o_statfs          = mdc_statfs,
2600         .o_pin        = mdc_pin,
2601         .o_unpin            = mdc_unpin,
2602         .o_fid_init         = client_fid_init,
2603         .o_fid_fini         = client_fid_fini,
2604         .o_fid_alloc    = mdc_fid_alloc,
2605         .o_import_event     = mdc_import_event,
2606         .o_llog_init    = mdc_llog_init,
2607         .o_llog_finish      = mdc_llog_finish,
2608         .o_get_info      = mdc_get_info,
2609         .o_process_config   = mdc_process_config,
2610         .o_get_uuid      = mdc_get_uuid,
2611         .o_quotactl      = mdc_quotactl,
2612         .o_quotacheck       = mdc_quotacheck
2613 };
2614 
2615 struct md_ops mdc_md_ops = {
2616         .m_getstatus    = mdc_getstatus,
2617         .m_null_inode       = mdc_null_inode,
2618         .m_find_cbdata      = mdc_find_cbdata,
2619         .m_close            = mdc_close,
2620         .m_create          = mdc_create,
2621         .m_done_writing     = mdc_done_writing,
2622         .m_enqueue        = mdc_enqueue,
2623         .m_getattr        = mdc_getattr,
2624         .m_getattr_name     = mdc_getattr_name,
2625         .m_intent_lock      = mdc_intent_lock,
2626         .m_link      = mdc_link,
2627         .m_is_subdir    = mdc_is_subdir,
2628         .m_rename          = mdc_rename,
2629         .m_setattr        = mdc_setattr,
2630         .m_setxattr      = mdc_setxattr,
2631         .m_getxattr      = mdc_getxattr,
2632         .m_sync      = mdc_sync,
2633         .m_readpage      = mdc_readpage,
2634         .m_unlink          = mdc_unlink,
2635         .m_cancel_unused    = mdc_cancel_unused,
2636         .m_init_ea_size     = mdc_init_ea_size,
2637         .m_set_lock_data    = mdc_set_lock_data,
2638         .m_lock_match       = mdc_lock_match,
2639         .m_get_lustre_md    = mdc_get_lustre_md,
2640         .m_free_lustre_md   = mdc_free_lustre_md,
2641         .m_set_open_replay_data = mdc_set_open_replay_data,
2642         .m_clear_open_replay_data = mdc_clear_open_replay_data,
2643         .m_renew_capa       = mdc_renew_capa,
2644         .m_unpack_capa      = mdc_unpack_capa,
2645         .m_get_remote_perm  = mdc_get_remote_perm,
2646         .m_intent_getattr_async = mdc_intent_getattr_async,
2647         .m_revalidate_lock      = mdc_revalidate_lock
2648 };
2649 
2650 int __init mdc_init(void)
2651 {
2652         int rc;
2653         struct lprocfs_static_vars lvars = { 0 };
2654         lprocfs_mdc_init_vars(&lvars);
2655 
2656         rc = class_register_type(&mdc_obd_ops, &mdc_md_ops, lvars.module_vars,
2657                                  LUSTRE_MDC_NAME, NULL);
2658         return rc;
2659 }
2660 
2661 static void /*__exit*/ mdc_exit(void)
2662 {
2663         class_unregister_type(LUSTRE_MDC_NAME);
2664 }
2665 
2666 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2667 MODULE_DESCRIPTION("Lustre Metadata Client");
2668 MODULE_LICENSE("GPL");
2669 
2670 module_init(mdc_init);
2671 module_exit(mdc_exit);
2672 

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