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[fs/lustre-release.git] / lustre / mdt / mdt_lib.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) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28  * Use is subject to license terms.
29  *
30  * Copyright (c) 2011, 2013, 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  * lustre/mdt/mdt_lib.c
37  *
38  * Lustre Metadata Target (mdt) request unpacking helper.
39  *
40  * Author: Peter Braam <braam@clusterfs.com>
41  * Author: Andreas Dilger <adilger@clusterfs.com>
42  * Author: Phil Schwan <phil@clusterfs.com>
43  * Author: Mike Shaver <shaver@clusterfs.com>
44  * Author: Nikita Danilov <nikita@clusterfs.com>
45  * Author: Huang Hua <huanghua@clusterfs.com>
46  * Author: Fan Yong <fanyong@clusterfs.com>
47  */
48
49 #define DEBUG_SUBSYSTEM S_MDS
50
51 #include "mdt_internal.h"
52 #include <lnet/lib-lnet.h>
53
54
55 typedef enum ucred_init_type {
56         NONE_INIT       = 0,
57         BODY_INIT       = 1,
58         REC_INIT        = 2
59 } ucred_init_type_t;
60
61 void mdt_exit_ucred(struct mdt_thread_info *info)
62 {
63         struct lu_ucred   *uc  = mdt_ucred(info);
64         struct mdt_device *mdt = info->mti_mdt;
65
66         LASSERT(uc != NULL);
67         if (uc->uc_valid != UCRED_INIT) {
68                 uc->uc_suppgids[0] = uc->uc_suppgids[1] = -1;
69                 if (uc->uc_ginfo) {
70                         put_group_info(uc->uc_ginfo);
71                         uc->uc_ginfo = NULL;
72                 }
73                 if (uc->uc_identity) {
74                         mdt_identity_put(mdt->mdt_identity_cache,
75                                          uc->uc_identity);
76                         uc->uc_identity = NULL;
77                 }
78                 uc->uc_valid = UCRED_INIT;
79         }
80 }
81
82 static int match_nosquash_list(struct rw_semaphore *sem,
83                                cfs_list_t *nidlist,
84                                lnet_nid_t peernid)
85 {
86         int rc;
87         ENTRY;
88         down_read(sem);
89         rc = cfs_match_nid(peernid, nidlist);
90         up_read(sem);
91         RETURN(rc);
92 }
93
94 /* root_squash for inter-MDS operations */
95 static int mdt_root_squash(struct mdt_thread_info *info, lnet_nid_t peernid)
96 {
97         struct lu_ucred *ucred = mdt_ucred(info);
98         ENTRY;
99
100         LASSERT(ucred != NULL);
101         if (!info->mti_mdt->mdt_squash_uid || ucred->uc_fsuid)
102                 RETURN(0);
103
104         if (match_nosquash_list(&info->mti_mdt->mdt_squash_sem,
105                                 &info->mti_mdt->mdt_nosquash_nids,
106                                 peernid)) {
107                 CDEBUG(D_OTHER, "%s is in nosquash_nids list\n",
108                        libcfs_nid2str(peernid));
109                 RETURN(0);
110         }
111
112         CDEBUG(D_OTHER, "squash req from %s, (%d:%d/%x)=>(%d:%d/%x)\n",
113                libcfs_nid2str(peernid),
114                ucred->uc_fsuid, ucred->uc_fsgid, ucred->uc_cap,
115                info->mti_mdt->mdt_squash_uid, info->mti_mdt->mdt_squash_gid,
116                0);
117
118         ucred->uc_fsuid = info->mti_mdt->mdt_squash_uid;
119         ucred->uc_fsgid = info->mti_mdt->mdt_squash_gid;
120         ucred->uc_cap = 0;
121         ucred->uc_suppgids[0] = -1;
122         ucred->uc_suppgids[1] = -1;
123
124         RETURN(0);
125 }
126
127 static int new_init_ucred(struct mdt_thread_info *info, ucred_init_type_t type,
128                           void *buf)
129 {
130         struct ptlrpc_request   *req = mdt_info_req(info);
131         struct mdt_device       *mdt = info->mti_mdt;
132         struct ptlrpc_user_desc *pud = req->rq_user_desc;
133         struct lu_ucred         *ucred = mdt_ucred(info);
134         lnet_nid_t               peernid = req->rq_peer.nid;
135         __u32                    perm = 0;
136         __u32                    remote = exp_connect_rmtclient(info->mti_exp);
137         int                      setuid;
138         int                      setgid;
139         int                      rc = 0;
140
141         ENTRY;
142
143         LASSERT(req->rq_auth_gss);
144         LASSERT(!req->rq_auth_usr_mdt);
145         LASSERT(req->rq_user_desc);
146         LASSERT(ucred != NULL);
147
148         ucred->uc_valid = UCRED_INVALID;
149
150         ucred->uc_o_uid   = pud->pud_uid;
151         ucred->uc_o_gid   = pud->pud_gid;
152         ucred->uc_o_fsuid = pud->pud_fsuid;
153         ucred->uc_o_fsgid = pud->pud_fsgid;
154
155         if (type == BODY_INIT) {
156                 struct mdt_body *body = (struct mdt_body *)buf;
157
158                 ucred->uc_suppgids[0] = body->suppgid;
159                 ucred->uc_suppgids[1] = -1;
160         }
161
162         /* sanity check: we expect the uid which client claimed is true */
163         if (remote) {
164                 if (req->rq_auth_mapped_uid == INVALID_UID) {
165                         CDEBUG(D_SEC, "remote user not mapped, deny access!\n");
166                         RETURN(-EACCES);
167                 }
168
169                 if (ptlrpc_user_desc_do_idmap(req, pud))
170                         RETURN(-EACCES);
171
172                 if (req->rq_auth_mapped_uid != pud->pud_uid) {
173                         CDEBUG(D_SEC, "remote client %s: auth/mapped uid %u/%u "
174                                "while client claims %u:%u/%u:%u\n",
175                                libcfs_nid2str(peernid), req->rq_auth_uid,
176                                req->rq_auth_mapped_uid,
177                                pud->pud_uid, pud->pud_gid,
178                                pud->pud_fsuid, pud->pud_fsgid);
179                         RETURN(-EACCES);
180                 }
181         } else {
182                 if (req->rq_auth_uid != pud->pud_uid) {
183                         CDEBUG(D_SEC, "local client %s: auth uid %u "
184                                "while client claims %u:%u/%u:%u\n",
185                                libcfs_nid2str(peernid), req->rq_auth_uid,
186                                pud->pud_uid, pud->pud_gid,
187                                pud->pud_fsuid, pud->pud_fsgid);
188                         RETURN(-EACCES);
189                 }
190         }
191
192         if (is_identity_get_disabled(mdt->mdt_identity_cache)) {
193                 if (remote) {
194                         CDEBUG(D_SEC, "remote client must run with identity_get "
195                                "enabled!\n");
196                         RETURN(-EACCES);
197                 } else {
198                         ucred->uc_identity = NULL;
199                         perm = CFS_SETUID_PERM | CFS_SETGID_PERM |
200                                CFS_SETGRP_PERM;
201                 }
202         } else {
203                 struct md_identity *identity;
204
205                 identity = mdt_identity_get(mdt->mdt_identity_cache,
206                                             pud->pud_uid);
207                 if (IS_ERR(identity)) {
208                         if (unlikely(PTR_ERR(identity) == -EREMCHG &&
209                                      !remote)) {
210                                 ucred->uc_identity = NULL;
211                                 perm = CFS_SETUID_PERM | CFS_SETGID_PERM |
212                                        CFS_SETGRP_PERM;
213                         } else {
214                                 CDEBUG(D_SEC, "Deny access without identity: uid %u\n",
215                                        pud->pud_uid);
216                                 RETURN(-EACCES);
217                         }
218                 } else {
219                         ucred->uc_identity = identity;
220                         perm = mdt_identity_get_perm(ucred->uc_identity,
221                                                      remote, peernid);
222                 }
223         }
224
225         /* find out the setuid/setgid attempt */
226         setuid = (pud->pud_uid != pud->pud_fsuid);
227         setgid = ((pud->pud_gid != pud->pud_fsgid) ||
228                   (ucred->uc_identity &&
229                    (pud->pud_gid != ucred->uc_identity->mi_gid)));
230
231         /* check permission of setuid */
232         if (setuid && !(perm & CFS_SETUID_PERM)) {
233                 CDEBUG(D_SEC, "mdt blocked setuid attempt (%u -> %u) from %s\n",
234                        pud->pud_uid, pud->pud_fsuid, libcfs_nid2str(peernid));
235                 GOTO(out, rc = -EACCES);
236         }
237
238         /* check permission of setgid */
239         if (setgid && !(perm & CFS_SETGID_PERM)) {
240                 CDEBUG(D_SEC, "mdt blocked setgid attempt (%u:%u/%u:%u -> %u) "
241                        "from %s\n", pud->pud_uid, pud->pud_gid,
242                        pud->pud_fsuid, pud->pud_fsgid,
243                        ucred->uc_identity->mi_gid, libcfs_nid2str(peernid));
244                 GOTO(out, rc = -EACCES);
245         }
246
247         /*
248          * NB: remote client not allowed to setgroups anyway.
249          */
250         if (!remote && perm & CFS_SETGRP_PERM) {
251                 if (pud->pud_ngroups) {
252                         /* setgroups for local client */
253                         ucred->uc_ginfo = groups_alloc(pud->pud_ngroups);
254                         if (!ucred->uc_ginfo) {
255                                 CERROR("failed to alloc %d groups\n",
256                                        pud->pud_ngroups);
257                                 GOTO(out, rc = -ENOMEM);
258                         }
259
260                         lustre_groups_from_list(ucred->uc_ginfo,
261                                                 pud->pud_groups);
262                         lustre_groups_sort(ucred->uc_ginfo);
263                 } else {
264                         ucred->uc_ginfo = NULL;
265                 }
266         } else {
267                 ucred->uc_suppgids[0] = -1;
268                 ucred->uc_suppgids[1] = -1;
269                 ucred->uc_ginfo = NULL;
270         }
271
272         ucred->uc_uid   = pud->pud_uid;
273         ucred->uc_gid   = pud->pud_gid;
274         ucred->uc_fsuid = pud->pud_fsuid;
275         ucred->uc_fsgid = pud->pud_fsgid;
276
277         /* process root_squash here. */
278         mdt_root_squash(info, peernid);
279
280         /* remove fs privilege for non-root user. */
281         if (ucred->uc_fsuid)
282                 ucred->uc_cap = pud->pud_cap & ~CFS_CAP_FS_MASK;
283         else
284                 ucred->uc_cap = pud->pud_cap;
285         if (remote && !(perm & CFS_RMTOWN_PERM))
286                 ucred->uc_cap &= ~(CFS_CAP_SYS_RESOURCE_MASK |
287                                    CFS_CAP_CHOWN_MASK);
288         ucred->uc_valid = UCRED_NEW;
289
290         EXIT;
291
292 out:
293         if (rc) {
294                 if (ucred->uc_ginfo) {
295                         put_group_info(ucred->uc_ginfo);
296                         ucred->uc_ginfo = NULL;
297                 }
298                 if (ucred->uc_identity) {
299                         mdt_identity_put(mdt->mdt_identity_cache,
300                                          ucred->uc_identity);
301                         ucred->uc_identity = NULL;
302                 }
303         }
304
305         return rc;
306 }
307
308 int mdt_check_ucred(struct mdt_thread_info *info)
309 {
310         struct ptlrpc_request   *req = mdt_info_req(info);
311         struct mdt_device       *mdt = info->mti_mdt;
312         struct ptlrpc_user_desc *pud = req->rq_user_desc;
313         struct lu_ucred         *ucred = mdt_ucred(info);
314         struct md_identity      *identity = NULL;
315         lnet_nid_t               peernid = req->rq_peer.nid;
316         __u32                    perm = 0;
317         __u32                    remote = exp_connect_rmtclient(info->mti_exp);
318         int                      setuid;
319         int                      setgid;
320         int                      rc = 0;
321
322         ENTRY;
323
324         LASSERT(ucred != NULL);
325         if ((ucred->uc_valid == UCRED_OLD) || (ucred->uc_valid == UCRED_NEW))
326                 RETURN(0);
327
328         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
329                 RETURN(0);
330
331         /* sanity check: if we use strong authentication, we expect the
332          * uid which client claimed is true */
333         if (remote) {
334                 if (req->rq_auth_mapped_uid == INVALID_UID) {
335                         CDEBUG(D_SEC, "remote user not mapped, deny access!\n");
336                         RETURN(-EACCES);
337                 }
338
339                 if (ptlrpc_user_desc_do_idmap(req, pud))
340                         RETURN(-EACCES);
341
342                 if (req->rq_auth_mapped_uid != pud->pud_uid) {
343                         CDEBUG(D_SEC, "remote client %s: auth/mapped uid %u/%u "
344                                "while client claims %u:%u/%u:%u\n",
345                                libcfs_nid2str(peernid), req->rq_auth_uid,
346                                req->rq_auth_mapped_uid,
347                                pud->pud_uid, pud->pud_gid,
348                                pud->pud_fsuid, pud->pud_fsgid);
349                         RETURN(-EACCES);
350                 }
351         } else {
352                 if (req->rq_auth_uid != pud->pud_uid) {
353                         CDEBUG(D_SEC, "local client %s: auth uid %u "
354                                "while client claims %u:%u/%u:%u\n",
355                                libcfs_nid2str(peernid), req->rq_auth_uid,
356                                pud->pud_uid, pud->pud_gid,
357                                pud->pud_fsuid, pud->pud_fsgid);
358                         RETURN(-EACCES);
359                 }
360         }
361
362         if (is_identity_get_disabled(mdt->mdt_identity_cache)) {
363                 if (remote) {
364                         CDEBUG(D_SEC, "remote client must run with identity_get "
365                                "enabled!\n");
366                         RETURN(-EACCES);
367                 }
368                 RETURN(0);
369         }
370
371         identity = mdt_identity_get(mdt->mdt_identity_cache, pud->pud_uid);
372         if (IS_ERR(identity)) {
373                 if (unlikely(PTR_ERR(identity) == -EREMCHG &&
374                              !remote)) {
375                         RETURN(0);
376                 } else {
377                         CDEBUG(D_SEC, "Deny access without identity: uid %u\n",
378                                pud->pud_uid);
379                         RETURN(-EACCES);
380                }
381         }
382
383         perm = mdt_identity_get_perm(identity, remote, peernid);
384         /* find out the setuid/setgid attempt */
385         setuid = (pud->pud_uid != pud->pud_fsuid);
386         setgid = (pud->pud_gid != pud->pud_fsgid ||
387                   pud->pud_gid != identity->mi_gid);
388
389         /* check permission of setuid */
390         if (setuid && !(perm & CFS_SETUID_PERM)) {
391                 CDEBUG(D_SEC, "mdt blocked setuid attempt (%u -> %u) from %s\n",
392                        pud->pud_uid, pud->pud_fsuid, libcfs_nid2str(peernid));
393                 GOTO(out, rc = -EACCES);
394         }
395
396         /* check permission of setgid */
397         if (setgid && !(perm & CFS_SETGID_PERM)) {
398                 CDEBUG(D_SEC, "mdt blocked setgid attempt (%u:%u/%u:%u -> %u) "
399                        "from %s\n", pud->pud_uid, pud->pud_gid,
400                        pud->pud_fsuid, pud->pud_fsgid, identity->mi_gid,
401                        libcfs_nid2str(peernid));
402                 GOTO(out, rc = -EACCES);
403         }
404
405         EXIT;
406
407 out:
408         mdt_identity_put(mdt->mdt_identity_cache, identity);
409         return rc;
410 }
411
412 static int old_init_ucred(struct mdt_thread_info *info,
413                           struct mdt_body *body)
414 {
415         struct lu_ucred *uc = mdt_ucred(info);
416         struct mdt_device  *mdt = info->mti_mdt;
417         struct md_identity *identity = NULL;
418
419         ENTRY;
420
421         LASSERT(uc != NULL);
422         uc->uc_valid = UCRED_INVALID;
423         uc->uc_o_uid = uc->uc_uid = body->uid;
424         uc->uc_o_gid = uc->uc_gid = body->gid;
425         uc->uc_o_fsuid = uc->uc_fsuid = body->fsuid;
426         uc->uc_o_fsgid = uc->uc_fsgid = body->fsgid;
427         uc->uc_suppgids[0] = body->suppgid;
428         uc->uc_suppgids[1] = -1;
429         uc->uc_ginfo = NULL;
430         if (!is_identity_get_disabled(mdt->mdt_identity_cache)) {
431                 identity = mdt_identity_get(mdt->mdt_identity_cache,
432                                             uc->uc_fsuid);
433                 if (IS_ERR(identity)) {
434                         if (unlikely(PTR_ERR(identity) == -EREMCHG)) {
435                                 identity = NULL;
436                         } else {
437                                 CDEBUG(D_SEC, "Deny access without identity: "
438                                        "uid %u\n", uc->uc_fsuid);
439                                 RETURN(-EACCES);
440                         }
441                 }
442         }
443         uc->uc_identity = identity;
444
445         /* process root_squash here. */
446         mdt_root_squash(info, mdt_info_req(info)->rq_peer.nid);
447
448         /* remove fs privilege for non-root user. */
449         if (uc->uc_fsuid)
450                 uc->uc_cap = body->capability & ~CFS_CAP_FS_MASK;
451         else
452                 uc->uc_cap = body->capability;
453         uc->uc_valid = UCRED_OLD;
454
455         RETURN(0);
456 }
457
458 static int old_init_ucred_reint(struct mdt_thread_info *info)
459 {
460         struct lu_ucred *uc = mdt_ucred(info);
461         struct mdt_device  *mdt = info->mti_mdt;
462         struct md_identity *identity = NULL;
463
464         ENTRY;
465
466         LASSERT(uc != NULL);
467         uc->uc_valid = UCRED_INVALID;
468         uc->uc_o_uid = uc->uc_o_fsuid = uc->uc_uid = uc->uc_fsuid;
469         uc->uc_o_gid = uc->uc_o_fsgid = uc->uc_gid = uc->uc_fsgid;
470         uc->uc_ginfo = NULL;
471         if (!is_identity_get_disabled(mdt->mdt_identity_cache)) {
472                 identity = mdt_identity_get(mdt->mdt_identity_cache,
473                                             uc->uc_fsuid);
474                 if (IS_ERR(identity)) {
475                         if (unlikely(PTR_ERR(identity) == -EREMCHG)) {
476                                 identity = NULL;
477                         } else {
478                                 CDEBUG(D_SEC, "Deny access without identity: "
479                                        "uid %u\n", uc->uc_fsuid);
480                                 RETURN(-EACCES);
481                         }
482                 }
483         }
484         uc->uc_identity = identity;
485
486         /* process root_squash here. */
487         mdt_root_squash(info, mdt_info_req(info)->rq_peer.nid);
488
489         /* remove fs privilege for non-root user. */
490         if (uc->uc_fsuid)
491                 uc->uc_cap &= ~CFS_CAP_FS_MASK;
492         uc->uc_valid = UCRED_OLD;
493
494         RETURN(0);
495 }
496
497 int mdt_init_ucred(struct mdt_thread_info *info, struct mdt_body *body)
498 {
499         struct ptlrpc_request *req = mdt_info_req(info);
500         struct lu_ucred       *uc  = mdt_ucred(info);
501
502         LASSERT(uc != NULL);
503         if ((uc->uc_valid == UCRED_OLD) || (uc->uc_valid == UCRED_NEW))
504                 return 0;
505
506         mdt_exit_ucred(info);
507
508         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
509                 return old_init_ucred(info, body);
510         else
511                 return new_init_ucred(info, BODY_INIT, body);
512 }
513
514 int mdt_init_ucred_reint(struct mdt_thread_info *info)
515 {
516         struct ptlrpc_request *req = mdt_info_req(info);
517         struct lu_ucred       *uc  = mdt_ucred(info);
518
519         LASSERT(uc != NULL);
520         if ((uc->uc_valid == UCRED_OLD) || (uc->uc_valid == UCRED_NEW))
521                 return 0;
522
523         mdt_exit_ucred(info);
524
525         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
526                 return old_init_ucred_reint(info);
527         else
528                 return new_init_ucred(info, REC_INIT, NULL);
529 }
530
531 /* copied from lov/lov_ea.c, just for debugging, will be removed later */
532 void mdt_dump_lmm(int level, const struct lov_mds_md *lmm)
533 {
534         const struct lov_ost_data_v1 *lod;
535         int                           i;
536         __u16                         count;
537
538         count = le16_to_cpu(((struct lov_user_md*)lmm)->lmm_stripe_count);
539
540         CDEBUG(level, "objid "DOSTID", magic 0x%08X, pattern %#X\n",
541                POSTID(&lmm->lmm_oi), le32_to_cpu(lmm->lmm_magic),
542                le32_to_cpu(lmm->lmm_pattern));
543         CDEBUG(level,"stripe_size=0x%x, stripe_count=0x%x\n",
544                le32_to_cpu(lmm->lmm_stripe_size), count);
545         if (count == LOV_ALL_STRIPES ||
546             le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
547                 return;
548
549         LASSERT(count <= LOV_MAX_STRIPE_COUNT);
550         for (i = 0, lod = lmm->lmm_objects; i < count; i++, lod++) {
551                 struct ost_id   oi;
552                 ostid_le_to_cpu(&lod->l_ost_oi, &oi);
553                 CDEBUG(level, "stripe %u idx %u subobj "DOSTID"\n",
554                        i, le32_to_cpu(lod->l_ost_idx), POSTID(&oi));
555         }
556 }
557
558 /* Shrink and/or grow reply buffers */
559 int mdt_fix_reply(struct mdt_thread_info *info)
560 {
561         struct req_capsule *pill = info->mti_pill;
562         struct mdt_body    *body;
563         int                md_size, md_packed = 0;
564         int                acl_size;
565         int                rc = 0;
566         ENTRY;
567
568         body = req_capsule_server_get(pill, &RMF_MDT_BODY);
569         LASSERT(body != NULL);
570
571         if (body->valid & (OBD_MD_FLDIREA | OBD_MD_FLEASIZE | OBD_MD_LINKNAME))
572                 md_size = body->eadatasize;
573         else
574                 md_size = 0;
575
576         acl_size = body->aclsize;
577
578         /* this replay - not send info to client */
579         if (info->mti_spec.no_create) {
580                 md_size = 0;
581                 acl_size = 0;
582         }
583
584         CDEBUG(D_INFO, "Shrink to md_size = %d cookie/acl_size = %d"
585                         " MDSCAPA = %llx, OSSCAPA = %llx\n",
586                         md_size, acl_size,
587                         (unsigned long long)(body->valid & OBD_MD_FLMDSCAPA),
588                         (unsigned long long)(body->valid & OBD_MD_FLOSSCAPA));
589 /*
590             &RMF_MDT_BODY,
591             &RMF_MDT_MD,
592             &RMF_ACL, or &RMF_LOGCOOKIES
593 (optional)  &RMF_CAPA1,
594 (optional)  &RMF_CAPA2,
595 (optional)  something else
596 */
597
598         /* MDT_MD buffer may be bigger than packed value, let's shrink all
599          * buffers before growing it */
600         if (info->mti_big_lmm_used) {
601                 LASSERT(req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER));
602                 md_packed = req_capsule_get_size(pill, &RMF_MDT_MD,
603                                                  RCL_SERVER);
604                 LASSERT(md_packed > 0);
605                 /* buffer must be allocated separately */
606                 LASSERT(info->mti_attr.ma_lmm !=
607                         req_capsule_server_get(pill, &RMF_MDT_MD));
608                 req_capsule_shrink(pill, &RMF_MDT_MD, 0, RCL_SERVER);
609                 /* free big lmm if md_size is not needed */
610                 if (md_size == 0)
611                         info->mti_big_lmm_used = 0;
612         } else if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER)) {
613                 req_capsule_shrink(pill, &RMF_MDT_MD, md_size, RCL_SERVER);
614         }
615
616         if (req_capsule_has_field(pill, &RMF_ACL, RCL_SERVER))
617                 req_capsule_shrink(pill, &RMF_ACL, acl_size, RCL_SERVER);
618         else if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER))
619                 req_capsule_shrink(pill, &RMF_LOGCOOKIES,
620                                    acl_size, RCL_SERVER);
621
622         if (req_capsule_has_field(pill, &RMF_CAPA1, RCL_SERVER) &&
623             !(body->valid & OBD_MD_FLMDSCAPA))
624                 req_capsule_shrink(pill, &RMF_CAPA1, 0, RCL_SERVER);
625
626         if (req_capsule_has_field(pill, &RMF_CAPA2, RCL_SERVER) &&
627             !(body->valid & OBD_MD_FLOSSCAPA))
628                 req_capsule_shrink(pill, &RMF_CAPA2, 0, RCL_SERVER);
629
630         /*
631          * Some more field should be shrinked if needed.
632          * This should be done by those who added fields to reply message.
633          */
634
635         /* Grow MD buffer if needed finally */
636         if (info->mti_big_lmm_used) {
637                 void *lmm;
638
639                 LASSERT(md_size > md_packed);
640                 CDEBUG(D_INFO, "Enlarge reply buffer, need extra %d bytes\n",
641                        md_size - md_packed);
642                 rc = req_capsule_server_grow(pill, &RMF_MDT_MD, md_size);
643                 if (rc) {
644                         /* we can't answer with proper LOV EA, drop flags,
645                          * the rc is also returned so this request is
646                          * considered as failed */
647                         body->valid &= ~(OBD_MD_FLDIREA | OBD_MD_FLEASIZE);
648                         /* don't return transno along with error */
649                         lustre_msg_set_transno(pill->rc_req->rq_repmsg, 0);
650                 } else {
651                         /* now we need to pack right LOV EA */
652                         lmm = req_capsule_server_get(pill, &RMF_MDT_MD);
653                         LASSERT(req_capsule_get_size(pill, &RMF_MDT_MD,
654                                                      RCL_SERVER) ==
655                                 info->mti_attr.ma_lmm_size);
656                         memcpy(lmm, info->mti_attr.ma_lmm,
657                                info->mti_attr.ma_lmm_size);
658                 }
659                 /* update mdt_max_mdsize so clients will be aware about that */
660                 if (info->mti_mdt->mdt_max_mdsize < info->mti_attr.ma_lmm_size)
661                         info->mti_mdt->mdt_max_mdsize =
662                                                     info->mti_attr.ma_lmm_size;
663                 info->mti_big_lmm_used = 0;
664         }
665         RETURN(rc);
666 }
667
668
669 /* if object is dying, pack the lov/llog data,
670  * parameter info->mti_attr should be valid at this point! */
671 int mdt_handle_last_unlink(struct mdt_thread_info *info, struct mdt_object *mo,
672                            const struct md_attr *ma)
673 {
674         struct mdt_body       *repbody;
675         const struct lu_attr *la = &ma->ma_attr;
676         int rc;
677         ENTRY;
678
679         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
680         LASSERT(repbody != NULL);
681
682         if (ma->ma_valid & MA_INODE)
683                 mdt_pack_attr2body(info, repbody, la, mdt_object_fid(mo));
684
685         if (ma->ma_valid & MA_LOV) {
686                 CERROR("No need in LOV EA upon unlink\n");
687                 dump_stack();
688         }
689         repbody->eadatasize = 0;
690
691         if (ma->ma_cookie_size && (ma->ma_valid & MA_COOKIE)) {
692                 repbody->aclsize = ma->ma_cookie_size;
693                 repbody->valid |= OBD_MD_FLCOOKIE;
694         }
695
696         if (info->mti_mdt->mdt_opts.mo_oss_capa &&
697             exp_connect_flags(info->mti_exp) & OBD_CONNECT_OSS_CAPA &&
698             repbody->valid & OBD_MD_FLEASIZE) {
699                 struct lustre_capa *capa;
700
701                 capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA2);
702                 LASSERT(capa);
703                 capa->lc_opc = CAPA_OPC_OSS_DESTROY;
704                 rc = mo_capa_get(info->mti_env, mdt_object_child(mo), capa, 0);
705                 if (rc)
706                         RETURN(rc);
707
708                 repbody->valid |= OBD_MD_FLOSSCAPA;
709         }
710
711         RETURN(0);
712 }
713
714 static __u64 mdt_attr_valid_xlate(__u64 in, struct mdt_reint_record *rr,
715                                   struct md_attr *ma)
716 {
717         __u64 out;
718
719         out = 0;
720         if (in & MDS_ATTR_MODE)
721                 out |= LA_MODE;
722         if (in & MDS_ATTR_UID)
723                 out |= LA_UID;
724         if (in & MDS_ATTR_GID)
725                 out |= LA_GID;
726         if (in & MDS_ATTR_SIZE)
727                 out |= LA_SIZE;
728         if (in & MDS_ATTR_BLOCKS)
729                 out |= LA_BLOCKS;
730         if (in & MDS_ATTR_ATIME_SET)
731                 out |= LA_ATIME;
732         if (in & MDS_ATTR_CTIME_SET)
733                 out |= LA_CTIME;
734         if (in & MDS_ATTR_MTIME_SET)
735                 out |= LA_MTIME;
736         if (in & MDS_ATTR_ATTR_FLAG)
737                 out |= LA_FLAGS;
738         if (in & MDS_ATTR_KILL_SUID)
739                 out |= LA_KILL_SUID;
740         if (in & MDS_ATTR_KILL_SGID)
741                 out |= LA_KILL_SGID;
742
743         if (in & MDS_ATTR_FROM_OPEN)
744                 rr->rr_flags |= MRF_OPEN_TRUNC;
745         if (in & MDS_OPEN_OWNEROVERRIDE)
746                 ma->ma_attr_flags |= MDS_OWNEROVERRIDE;
747         if (in & MDS_ATTR_FORCE)
748                 ma->ma_attr_flags |= MDS_PERM_BYPASS;
749
750         in &= ~(MDS_ATTR_MODE | MDS_ATTR_UID | MDS_ATTR_GID |
751                 MDS_ATTR_ATIME | MDS_ATTR_MTIME | MDS_ATTR_CTIME |
752                 MDS_ATTR_ATIME_SET | MDS_ATTR_CTIME_SET | MDS_ATTR_MTIME_SET |
753                 MDS_ATTR_SIZE | MDS_ATTR_BLOCKS | MDS_ATTR_ATTR_FLAG |
754                 MDS_ATTR_FORCE | MDS_ATTR_KILL_SUID | MDS_ATTR_KILL_SGID |
755                 MDS_ATTR_FROM_OPEN | MDS_OPEN_OWNEROVERRIDE);
756         if (in != 0)
757                 CERROR("Unknown attr bits: "LPX64"\n", in);
758         return out;
759 }
760
761 void mdt_set_capainfo(struct mdt_thread_info *info, int offset,
762                       const struct lu_fid *fid, struct lustre_capa *capa)
763 {
764         struct lu_capainfo *lci;
765
766         LASSERT(offset >= 0 && offset < LU_CAPAINFO_MAX);
767         if (!info->mti_mdt->mdt_opts.mo_mds_capa ||
768             !(exp_connect_flags(info->mti_exp) & OBD_CONNECT_MDS_CAPA))
769                 return;
770
771         lci = lu_capainfo_get(info->mti_env);
772         LASSERT(lci);
773         lci->lci_fid[offset]  = *fid;
774         lci->lci_capa[offset] = capa;
775 }
776
777 #ifdef DEBUG_CAPA
778 void mdt_dump_capainfo(struct mdt_thread_info *info)
779 {
780         struct lu_capainfo *lci = lu_capainfo_get(info->mti_env);
781         int i;
782
783         if (lci == NULL)
784                 return;
785
786         for (i = 0; i < LU_CAPAINFO_MAX; i++) {
787                 if (lci->lci_capa[i] == NULL) {
788                         CERROR("no capa for index %d "DFID"\n",
789                                i, PFID(&lci->lci_fid[i]));
790                         continue;
791                 }
792                 if (lci->lci_capa[i] == BYPASS_CAPA) {
793                         CERROR("bypass for index %d "DFID"\n",
794                                i, PFID(&lci->lci_fid[i]));
795                         continue;
796                 }
797                 DEBUG_CAPA(D_ERROR, lci->lci_capa[i], "index %d", i);
798         }
799 }
800 #endif /* DEBUG_CAPA */
801
802 /* unpacking */
803
804 static int mdt_setattr_unpack_rec(struct mdt_thread_info *info)
805 {
806         struct lu_ucred         *uc  = mdt_ucred(info);
807         struct md_attr          *ma = &info->mti_attr;
808         struct lu_attr          *la = &ma->ma_attr;
809         struct req_capsule      *pill = info->mti_pill;
810         struct mdt_reint_record *rr = &info->mti_rr;
811         struct mdt_rec_setattr  *rec;
812         ENTRY;
813
814         CLASSERT(sizeof(struct mdt_rec_setattr)== sizeof(struct mdt_rec_reint));
815         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
816         if (rec == NULL)
817                 RETURN(-EFAULT);
818
819         /* This prior initialization is needed for old_init_ucred_reint() */
820         uc->uc_fsuid = rec->sa_fsuid;
821         uc->uc_fsgid = rec->sa_fsgid;
822         uc->uc_cap   = rec->sa_cap;
823         uc->uc_suppgids[0] = rec->sa_suppgid;
824         uc->uc_suppgids[1] = -1;
825
826         rr->rr_fid1 = &rec->sa_fid;
827         la->la_valid = mdt_attr_valid_xlate(rec->sa_valid, rr, ma);
828         /*  If MDS_ATTR_xTIME is set without MDS_ATTR_xTIME_SET and
829          *  the client does not have OBD_CONNECT_FULL20, convert it
830          *  to LA_xTIME. LU-3036 */
831         if (!(exp_connect_flags(info->mti_exp) & OBD_CONNECT_FULL20)) {
832                 if (!(rec->sa_valid & MDS_ATTR_ATIME_SET) &&
833                      (rec->sa_valid & MDS_ATTR_ATIME))
834                         la->la_valid |= LA_ATIME;
835                 if (!(rec->sa_valid & MDS_ATTR_MTIME_SET) &&
836                      (rec->sa_valid & MDS_ATTR_MTIME))
837                         la->la_valid |= LA_MTIME;
838                 if (!(rec->sa_valid & MDS_ATTR_CTIME_SET) &&
839                      (rec->sa_valid & MDS_ATTR_CTIME))
840                         la->la_valid |= LA_CTIME;
841         }
842         la->la_mode  = rec->sa_mode;
843         la->la_flags = rec->sa_attr_flags;
844         la->la_uid   = rec->sa_uid;
845         la->la_gid   = rec->sa_gid;
846         la->la_size  = rec->sa_size;
847         la->la_blocks = rec->sa_blocks;
848         la->la_ctime = rec->sa_ctime;
849         la->la_atime = rec->sa_atime;
850         la->la_mtime = rec->sa_mtime;
851         ma->ma_valid = MA_INODE;
852
853         if (rec->sa_bias & MDS_DATA_MODIFIED)
854                 ma->ma_attr_flags |= MDS_DATA_MODIFIED;
855         else
856                 ma->ma_attr_flags &= ~MDS_DATA_MODIFIED;
857
858         if (rec->sa_bias & MDS_HSM_RELEASE)
859                 ma->ma_attr_flags |= MDS_HSM_RELEASE;
860         else
861                 ma->ma_attr_flags &= ~MDS_HSM_RELEASE;
862
863         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
864                 mdt_set_capainfo(info, 0, rr->rr_fid1,
865                                  req_capsule_client_get(pill, &RMF_CAPA1));
866
867         RETURN(0);
868 }
869
870 static int mdt_ioepoch_unpack(struct mdt_thread_info *info)
871 {
872         struct req_capsule *pill = info->mti_pill;
873         ENTRY;
874
875         if (req_capsule_get_size(pill, &RMF_MDT_EPOCH, RCL_CLIENT))
876                 info->mti_ioepoch =
877                         req_capsule_client_get(pill, &RMF_MDT_EPOCH);
878         else
879                 info->mti_ioepoch = NULL;
880         RETURN(info->mti_ioepoch == NULL ? -EFAULT : 0);
881 }
882
883 static inline int mdt_dlmreq_unpack(struct mdt_thread_info *info) {
884         struct req_capsule      *pill = info->mti_pill;
885
886         if (req_capsule_get_size(pill, &RMF_DLM_REQ, RCL_CLIENT)) {
887                 info->mti_dlm_req = req_capsule_client_get(pill, &RMF_DLM_REQ);
888                 if (info->mti_dlm_req == NULL)
889                         RETURN(-EFAULT);
890         }
891
892         RETURN(0);
893 }
894
895 static int mdt_setattr_unpack(struct mdt_thread_info *info)
896 {
897         struct mdt_reint_record *rr = &info->mti_rr;
898         struct md_attr          *ma = &info->mti_attr;
899         struct req_capsule      *pill = info->mti_pill;
900         int rc;
901         ENTRY;
902
903         rc = mdt_setattr_unpack_rec(info);
904         if (rc)
905                 RETURN(rc);
906
907         /* Epoch may be absent */
908         mdt_ioepoch_unpack(info);
909
910         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
911                 rr->rr_eadata = req_capsule_client_get(pill, &RMF_EADATA);
912                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
913                                                         RCL_CLIENT);
914                 ma->ma_lmm_size = rr->rr_eadatalen;
915                 if (ma->ma_lmm_size > 0) {
916                         ma->ma_lmm = (void *)rr->rr_eadata;
917                         ma->ma_valid |= MA_LOV;
918                 }
919         }
920
921         rc = mdt_dlmreq_unpack(info);
922         RETURN(rc);
923 }
924
925 static int mdt_hsm_release_unpack(struct mdt_thread_info *info)
926 {
927         struct md_attr          *ma = &info->mti_attr;
928         struct req_capsule      *pill = info->mti_pill;
929         ENTRY;
930
931         if (!(ma->ma_attr_flags & MDS_HSM_RELEASE))
932                 RETURN(0);
933
934         req_capsule_extend(pill, &RQF_MDS_RELEASE_CLOSE);
935
936         if (!(req_capsule_has_field(pill, &RMF_CLOSE_DATA, RCL_CLIENT) &&
937             req_capsule_field_present(pill, &RMF_CLOSE_DATA, RCL_CLIENT)))
938                 RETURN(-EFAULT);
939
940         RETURN(0);
941 }
942
943 int mdt_close_unpack(struct mdt_thread_info *info)
944 {
945         int rc;
946         ENTRY;
947
948         rc = mdt_ioepoch_unpack(info);
949         if (rc)
950                 RETURN(rc);
951
952         rc = mdt_setattr_unpack_rec(info);
953         if (rc)
954                 RETURN(rc);
955
956         rc = mdt_hsm_release_unpack(info);
957         if (rc)
958                 RETURN(rc);
959
960         RETURN(mdt_init_ucred_reint(info));
961 }
962
963 static int mdt_create_unpack(struct mdt_thread_info *info)
964 {
965         struct lu_ucred         *uc  = mdt_ucred(info);
966         struct mdt_rec_create   *rec;
967         struct lu_attr          *attr = &info->mti_attr.ma_attr;
968         struct mdt_reint_record *rr = &info->mti_rr;
969         struct req_capsule      *pill = info->mti_pill;
970         struct md_op_spec       *sp = &info->mti_spec;
971         int rc;
972         ENTRY;
973
974         CLASSERT(sizeof(struct mdt_rec_create) == sizeof(struct mdt_rec_reint));
975         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
976         if (rec == NULL)
977                 RETURN(-EFAULT);
978
979         /* This prior initialization is needed for old_init_ucred_reint() */
980         uc->uc_fsuid = rec->cr_fsuid;
981         uc->uc_fsgid = rec->cr_fsgid;
982         uc->uc_cap   = rec->cr_cap;
983         uc->uc_suppgids[0] = rec->cr_suppgid1;
984         uc->uc_suppgids[1] = -1;
985         uc->uc_umask = rec->cr_umask;
986
987         rr->rr_fid1 = &rec->cr_fid1;
988         rr->rr_fid2 = &rec->cr_fid2;
989         attr->la_mode = rec->cr_mode;
990         attr->la_rdev  = rec->cr_rdev;
991         attr->la_uid   = rec->cr_fsuid;
992         attr->la_gid   = rec->cr_fsgid;
993         attr->la_ctime = rec->cr_time;
994         attr->la_mtime = rec->cr_time;
995         attr->la_atime = rec->cr_time;
996         attr->la_valid = LA_MODE | LA_RDEV | LA_UID | LA_GID | LA_TYPE |
997                          LA_CTIME | LA_MTIME | LA_ATIME;
998         memset(&sp->u, 0, sizeof(sp->u));
999         sp->sp_cr_flags = get_mrc_cr_flags(rec);
1000
1001         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1002                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1003                                  req_capsule_client_get(pill, &RMF_CAPA1));
1004         mdt_set_capainfo(info, 1, rr->rr_fid2, BYPASS_CAPA);
1005
1006         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1007         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME,
1008                                               RCL_CLIENT) - 1;
1009         LASSERT(rr->rr_name && rr->rr_namelen > 0);
1010
1011         if (S_ISLNK(attr->la_mode)) {
1012                 const char *tgt = NULL;
1013
1014                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_SYM);
1015                 if (req_capsule_get_size(pill, &RMF_SYMTGT, RCL_CLIENT)) {
1016                         tgt = req_capsule_client_get(pill, &RMF_SYMTGT);
1017                         sp->u.sp_symname = tgt;
1018                 }
1019                 if (tgt == NULL)
1020                         RETURN(-EFAULT);
1021         } else {
1022                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_RMT_ACL);
1023         }
1024
1025         rc = mdt_dlmreq_unpack(info);
1026         RETURN(rc);
1027 }
1028
1029 static int mdt_link_unpack(struct mdt_thread_info *info)
1030 {
1031         struct lu_ucred         *uc  = mdt_ucred(info);
1032         struct mdt_rec_link     *rec;
1033         struct lu_attr          *attr = &info->mti_attr.ma_attr;
1034         struct mdt_reint_record *rr = &info->mti_rr;
1035         struct req_capsule      *pill = info->mti_pill;
1036         int rc;
1037         ENTRY;
1038
1039         CLASSERT(sizeof(struct mdt_rec_link) == sizeof(struct mdt_rec_reint));
1040         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1041         if (rec == NULL)
1042                 RETURN(-EFAULT);
1043
1044         /* This prior initialization is needed for old_init_ucred_reint() */
1045         uc->uc_fsuid = rec->lk_fsuid;
1046         uc->uc_fsgid = rec->lk_fsgid;
1047         uc->uc_cap   = rec->lk_cap;
1048         uc->uc_suppgids[0] = rec->lk_suppgid1;
1049         uc->uc_suppgids[1] = rec->lk_suppgid2;
1050
1051         attr->la_uid = rec->lk_fsuid;
1052         attr->la_gid = rec->lk_fsgid;
1053         rr->rr_fid1 = &rec->lk_fid1;
1054         rr->rr_fid2 = &rec->lk_fid2;
1055         attr->la_ctime = rec->lk_time;
1056         attr->la_mtime = rec->lk_time;
1057         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME;
1058
1059         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1060                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1061                                  req_capsule_client_get(pill, &RMF_CAPA1));
1062         if (req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT))
1063                 mdt_set_capainfo(info, 1, rr->rr_fid2,
1064                                  req_capsule_client_get(pill, &RMF_CAPA2));
1065
1066         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1067         if (rr->rr_name == NULL)
1068                 RETURN(-EFAULT);
1069         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1070
1071         LASSERT(rr->rr_namelen > 0);
1072
1073         rc = mdt_dlmreq_unpack(info);
1074         RETURN(rc);
1075 }
1076
1077 static int mdt_unlink_unpack(struct mdt_thread_info *info)
1078 {
1079         struct lu_ucred         *uc  = mdt_ucred(info);
1080         struct mdt_rec_unlink   *rec;
1081         struct md_attr          *ma = &info->mti_attr;
1082         struct lu_attr          *attr = &info->mti_attr.ma_attr;
1083         struct mdt_reint_record *rr = &info->mti_rr;
1084         struct req_capsule      *pill = info->mti_pill;
1085         int rc;
1086         ENTRY;
1087
1088         CLASSERT(sizeof(struct mdt_rec_unlink) == sizeof(struct mdt_rec_reint));
1089         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1090         if (rec == NULL)
1091                 RETURN(-EFAULT);
1092
1093         /* This prior initialization is needed for old_init_ucred_reint() */
1094         uc->uc_fsuid = rec->ul_fsuid;
1095         uc->uc_fsgid = rec->ul_fsgid;
1096         uc->uc_cap   = rec->ul_cap;
1097         uc->uc_suppgids[0] = rec->ul_suppgid1;
1098         uc->uc_suppgids[1] = -1;
1099
1100         attr->la_uid = rec->ul_fsuid;
1101         attr->la_gid = rec->ul_fsgid;
1102         rr->rr_fid1 = &rec->ul_fid1;
1103         rr->rr_fid2 = &rec->ul_fid2;
1104         attr->la_ctime = rec->ul_time;
1105         attr->la_mtime = rec->ul_time;
1106         attr->la_mode  = rec->ul_mode;
1107         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1108
1109         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1110                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1111                                  req_capsule_client_get(pill, &RMF_CAPA1));
1112
1113         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1114         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1115         if (rr->rr_name == NULL || rr->rr_namelen == 0)
1116                 RETURN(-EFAULT);
1117
1118         if (rec->ul_bias & MDS_VTX_BYPASS)
1119                 ma->ma_attr_flags |= MDS_VTX_BYPASS;
1120         else
1121                 ma->ma_attr_flags &= ~MDS_VTX_BYPASS;
1122
1123         info->mti_spec.no_create = !!req_is_replay(mdt_info_req(info));
1124
1125         rc = mdt_dlmreq_unpack(info);
1126         RETURN(rc);
1127 }
1128
1129 static int mdt_rmentry_unpack(struct mdt_thread_info *info)
1130 {
1131         info->mti_spec.sp_rm_entry = 1;
1132         return mdt_unlink_unpack(info);
1133 }
1134
1135 static int mdt_rename_unpack(struct mdt_thread_info *info)
1136 {
1137         struct lu_ucred         *uc = mdt_ucred(info);
1138         struct mdt_rec_rename   *rec;
1139         struct md_attr          *ma = &info->mti_attr;
1140         struct lu_attr          *attr = &info->mti_attr.ma_attr;
1141         struct mdt_reint_record *rr = &info->mti_rr;
1142         struct req_capsule      *pill = info->mti_pill;
1143         int rc;
1144         ENTRY;
1145
1146         CLASSERT(sizeof(struct mdt_rec_rename) == sizeof(struct mdt_rec_reint));
1147         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1148         if (rec == NULL)
1149                 RETURN(-EFAULT);
1150
1151         /* This prior initialization is needed for old_init_ucred_reint() */
1152         uc->uc_fsuid = rec->rn_fsuid;
1153         uc->uc_fsgid = rec->rn_fsgid;
1154         uc->uc_cap   = rec->rn_cap;
1155         uc->uc_suppgids[0] = rec->rn_suppgid1;
1156         uc->uc_suppgids[1] = rec->rn_suppgid2;
1157
1158         attr->la_uid = rec->rn_fsuid;
1159         attr->la_gid = rec->rn_fsgid;
1160         rr->rr_fid1 = &rec->rn_fid1;
1161         rr->rr_fid2 = &rec->rn_fid2;
1162         attr->la_ctime = rec->rn_time;
1163         attr->la_mtime = rec->rn_time;
1164         /* rename_tgt contains the mode already */
1165         attr->la_mode = rec->rn_mode;
1166         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1167
1168         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1169                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1170                                  req_capsule_client_get(pill, &RMF_CAPA1));
1171         if (req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT))
1172                 mdt_set_capainfo(info, 1, rr->rr_fid2,
1173                                  req_capsule_client_get(pill, &RMF_CAPA2));
1174
1175         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1176         rr->rr_tgt = req_capsule_client_get(pill, &RMF_SYMTGT);
1177         if (rr->rr_name == NULL || rr->rr_tgt == NULL)
1178                 RETURN(-EFAULT);
1179         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1180         rr->rr_tgtlen = req_capsule_get_size(pill, &RMF_SYMTGT, RCL_CLIENT) - 1;
1181         LASSERT(rr->rr_namelen > 0 && rr->rr_tgtlen > 0);
1182
1183         if (rec->rn_bias & MDS_VTX_BYPASS)
1184                 ma->ma_attr_flags |= MDS_VTX_BYPASS;
1185         else
1186                 ma->ma_attr_flags &= ~MDS_VTX_BYPASS;
1187
1188         info->mti_spec.no_create = !!req_is_replay(mdt_info_req(info));
1189
1190         rc = mdt_dlmreq_unpack(info);
1191         RETURN(rc);
1192 }
1193
1194 /*
1195  * please see comment above LOV_MAGIC_V1_DEF
1196  */
1197 static void mdt_fix_lov_magic(struct mdt_thread_info *info)
1198 {
1199         struct mdt_reint_record *rr = &info->mti_rr;
1200         struct lov_user_md_v1   *v1;
1201
1202         v1 = (void *)rr->rr_eadata;
1203         LASSERT(v1);
1204
1205         if (unlikely(req_is_replay(mdt_info_req(info)))) {
1206                 if (v1->lmm_magic == LOV_USER_MAGIC_V1) {
1207                         v1->lmm_magic = LOV_MAGIC_V1_DEF;
1208                 } else if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_V1)) {
1209                         v1->lmm_magic = __swab32(LOV_MAGIC_V1_DEF);
1210                 } else if (v1->lmm_magic == LOV_USER_MAGIC_V3) {
1211                         v1->lmm_magic = LOV_MAGIC_V3_DEF;
1212                 } else if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_V3)) {
1213                         v1->lmm_magic = __swab32(LOV_MAGIC_V3_DEF);
1214                 }
1215         }
1216 }
1217
1218 static int mdt_open_unpack(struct mdt_thread_info *info)
1219 {
1220         struct lu_ucred         *uc = mdt_ucred(info);
1221         struct mdt_rec_create   *rec;
1222         struct lu_attr          *attr = &info->mti_attr.ma_attr;
1223         struct req_capsule      *pill = info->mti_pill;
1224         struct mdt_reint_record *rr   = &info->mti_rr;
1225         struct ptlrpc_request   *req  = mdt_info_req(info);
1226         struct md_op_spec       *sp   = &info->mti_spec;
1227         ENTRY;
1228
1229         CLASSERT(sizeof(struct mdt_rec_create) == sizeof(struct mdt_rec_reint));
1230         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1231         if (rec == NULL)
1232                 RETURN(-EFAULT);
1233
1234         /* This prior initialization is needed for old_init_ucred_reint() */
1235         uc->uc_fsuid = rec->cr_fsuid;
1236         uc->uc_fsgid = rec->cr_fsgid;
1237         uc->uc_cap   = rec->cr_cap;
1238         uc->uc_suppgids[0] = rec->cr_suppgid1;
1239         uc->uc_suppgids[1] = rec->cr_suppgid2;
1240         uc->uc_umask = rec->cr_umask;
1241
1242         rr->rr_fid1   = &rec->cr_fid1;
1243         rr->rr_fid2   = &rec->cr_fid2;
1244         rr->rr_handle = &rec->cr_old_handle;
1245         attr->la_mode = rec->cr_mode;
1246         attr->la_rdev  = rec->cr_rdev;
1247         attr->la_uid   = rec->cr_fsuid;
1248         attr->la_gid   = rec->cr_fsgid;
1249         attr->la_ctime = rec->cr_time;
1250         attr->la_mtime = rec->cr_time;
1251         attr->la_atime = rec->cr_time;
1252         attr->la_valid = LA_MODE  | LA_RDEV  | LA_UID   | LA_GID |
1253                          LA_CTIME | LA_MTIME | LA_ATIME;
1254         memset(&info->mti_spec.u, 0, sizeof(info->mti_spec.u));
1255         info->mti_spec.sp_cr_flags = get_mrc_cr_flags(rec);
1256         /* Do not trigger ASSERTION if client miss to set such flags. */
1257         if (unlikely(info->mti_spec.sp_cr_flags == 0))
1258                 RETURN(-EPROTO);
1259         info->mti_replayepoch = rec->cr_ioepoch;
1260
1261         info->mti_cross_ref = !!(rec->cr_bias & MDS_CROSS_REF);
1262
1263         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1264                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1265                                  req_capsule_client_get(pill, &RMF_CAPA1));
1266         if (req_is_replay(req) &&
1267             req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT)) {
1268 #if 0
1269                 mdt_set_capainfo(info, 1, rr->rr_fid2,
1270                                  req_capsule_client_get(pill, &RMF_CAPA2));
1271 #else
1272                 /*
1273                  * FIXME: capa in replay open request might have expired,
1274                  * bypass capa check. Security hole?
1275                  */
1276                 mdt_set_capainfo(info, 0, rr->rr_fid1, BYPASS_CAPA);
1277                 mdt_set_capainfo(info, 1, rr->rr_fid2, BYPASS_CAPA);
1278 #endif
1279         }
1280
1281         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1282         if (rr->rr_name == NULL)
1283                 RETURN(-EFAULT);
1284         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1285
1286         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1287                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1288                                                         RCL_CLIENT);
1289                 if (rr->rr_eadatalen > 0) {
1290                         rr->rr_eadata = req_capsule_client_get(pill,
1291                                                                &RMF_EADATA);
1292                         sp->u.sp_ea.eadatalen = rr->rr_eadatalen;
1293                         sp->u.sp_ea.eadata = rr->rr_eadata;
1294                         sp->no_create = !!req_is_replay(req);
1295                         mdt_fix_lov_magic(info);
1296                 }
1297
1298                 /*
1299                  * Client default md_size may be 0 right after client start,
1300                  * until all osc are connected, set here just some reasonable
1301                  * value to prevent misbehavior.
1302                  */
1303                 if (rr->rr_eadatalen == 0 &&
1304                     !(info->mti_spec.sp_cr_flags & MDS_OPEN_DELAY_CREATE))
1305                         rr->rr_eadatalen = MIN_MD_SIZE;
1306         }
1307
1308         RETURN(0);
1309 }
1310
1311 static int mdt_setxattr_unpack(struct mdt_thread_info *info)
1312 {
1313         struct mdt_reint_record   *rr   = &info->mti_rr;
1314         struct lu_ucred           *uc   = mdt_ucred(info);
1315         struct lu_attr            *attr = &info->mti_attr.ma_attr;
1316         struct req_capsule        *pill = info->mti_pill;
1317         struct mdt_rec_setxattr   *rec;
1318         ENTRY;
1319
1320
1321         CLASSERT(sizeof(struct mdt_rec_setxattr) ==
1322                          sizeof(struct mdt_rec_reint));
1323
1324         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1325         if (rec == NULL)
1326                 RETURN(-EFAULT);
1327
1328         /* This prior initialization is needed for old_init_ucred_reint() */
1329         uc->uc_fsuid  = rec->sx_fsuid;
1330         uc->uc_fsgid  = rec->sx_fsgid;
1331         uc->uc_cap    = rec->sx_cap;
1332         uc->uc_suppgids[0] = rec->sx_suppgid1;
1333         uc->uc_suppgids[1] = -1;
1334
1335         rr->rr_opcode = rec->sx_opcode;
1336         rr->rr_fid1   = &rec->sx_fid;
1337         attr->la_valid = rec->sx_valid;
1338         attr->la_ctime = rec->sx_time;
1339         attr->la_size = rec->sx_size;
1340         attr->la_flags = rec->sx_flags;
1341
1342         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1343                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1344                                  req_capsule_client_get(pill, &RMF_CAPA1));
1345         else
1346                 mdt_set_capainfo(info, 0, rr->rr_fid1, BYPASS_CAPA);
1347
1348         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1349         if (rr->rr_name == NULL)
1350                 RETURN(-EFAULT);
1351         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1352         LASSERT(rr->rr_namelen > 0);
1353
1354         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1355                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1356                                                         RCL_CLIENT);
1357                 if (rr->rr_eadatalen > 0) {
1358                         rr->rr_eadata = req_capsule_client_get(pill,
1359                                                                &RMF_EADATA);
1360                         if (rr->rr_eadata == NULL)
1361                                 RETURN(-EFAULT);
1362                 } else {
1363                         rr->rr_eadata = NULL;
1364                 }
1365         } else if (!(attr->la_valid & OBD_MD_FLXATTRRM)) {
1366                 CDEBUG(D_INFO, "no xattr data supplied\n");
1367                 RETURN(-EFAULT);
1368         }
1369
1370         if (mdt_dlmreq_unpack(info) < 0)
1371                 RETURN(-EPROTO);
1372
1373         RETURN(0);
1374 }
1375
1376
1377 typedef int (*reint_unpacker)(struct mdt_thread_info *info);
1378
1379 static reint_unpacker mdt_reint_unpackers[REINT_MAX] = {
1380         [REINT_SETATTR]  = mdt_setattr_unpack,
1381         [REINT_CREATE]   = mdt_create_unpack,
1382         [REINT_LINK]     = mdt_link_unpack,
1383         [REINT_UNLINK]   = mdt_unlink_unpack,
1384         [REINT_RENAME]   = mdt_rename_unpack,
1385         [REINT_OPEN]     = mdt_open_unpack,
1386         [REINT_SETXATTR] = mdt_setxattr_unpack,
1387         [REINT_RMENTRY]  = mdt_rmentry_unpack,
1388 };
1389
1390 int mdt_reint_unpack(struct mdt_thread_info *info, __u32 op)
1391 {
1392         int rc;
1393         ENTRY;
1394
1395         memset(&info->mti_rr, 0, sizeof(info->mti_rr));
1396         if (op < REINT_MAX && mdt_reint_unpackers[op] != NULL) {
1397                 info->mti_rr.rr_opcode = op;
1398                 rc = mdt_reint_unpackers[op](info);
1399         } else {
1400                 CERROR("Unexpected opcode %d\n", op);
1401                 rc = -EFAULT;
1402         }
1403         RETURN(rc);
1404 }