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Merge tag 'media/v4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[mirror_ubuntu-zesty-kernel.git] / 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.gnu.org/licenses/gpl-2.0.html
19 *
20 * GPL HEADER END
21 */
22 /*
23 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
25 *
26 * Copyright (c) 2011, 2015, Intel Corporation.
27 */
28 /*
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
31 */
32
33 #define DEBUG_SUBSYSTEM S_MDC
34
35 # include <linux/module.h>
36 # include <linux/pagemap.h>
37 # include <linux/miscdevice.h>
38 # include <linux/init.h>
39 # include <linux/utsname.h>
40
41 #include "../include/lustre_acl.h"
42 #include "../include/obd_class.h"
43 #include "../include/lustre_fid.h"
44 #include "../include/lprocfs_status.h"
45 #include "../include/lustre_param.h"
46 #include "../include/lustre_log.h"
47 #include "../include/lustre_kernelcomm.h"
48
49 #include "mdc_internal.h"
50
51 #define REQUEST_MINOR 244
52
53 static int mdc_cleanup(struct obd_device *obd);
54
55 static inline int mdc_queue_wait(struct ptlrpc_request *req)
56 {
57 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
58 int rc;
59
60 /* mdc_enter_request() ensures that this client has no more
61 * than cl_max_rpcs_in_flight RPCs simultaneously inf light
62 * against an MDT.
63 */
64 rc = mdc_enter_request(cli);
65 if (rc != 0)
66 return rc;
67
68 rc = ptlrpc_queue_wait(req);
69 mdc_exit_request(cli);
70
71 return rc;
72 }
73
74 static int mdc_getstatus(struct obd_export *exp, struct lu_fid *rootfid)
75 {
76 struct ptlrpc_request *req;
77 struct mdt_body *body;
78 int rc;
79
80 req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
81 &RQF_MDS_GETSTATUS,
82 LUSTRE_MDS_VERSION, MDS_GETSTATUS);
83 if (!req)
84 return -ENOMEM;
85
86 mdc_pack_body(req, NULL, 0, 0, -1, 0);
87 req->rq_send_state = LUSTRE_IMP_FULL;
88
89 ptlrpc_request_set_replen(req);
90
91 rc = ptlrpc_queue_wait(req);
92 if (rc)
93 goto out;
94
95 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
96 if (!body) {
97 rc = -EPROTO;
98 goto out;
99 }
100
101 *rootfid = body->fid1;
102 CDEBUG(D_NET,
103 "root fid="DFID", last_committed=%llu\n",
104 PFID(rootfid),
105 lustre_msg_get_last_committed(req->rq_repmsg));
106 out:
107 ptlrpc_req_finished(req);
108 return rc;
109 }
110
111 /*
112 * This function now is known to always saying that it will receive 4 buffers
113 * from server. Even for cases when acl_size and md_size is zero, RPC header
114 * will contain 4 fields and RPC itself will contain zero size fields. This is
115 * because mdt_getattr*() _always_ returns 4 fields, but if acl is not needed
116 * and thus zero, it shrinks it, making zero size. The same story about
117 * md_size. And this is course of problem when client waits for smaller number
118 * of fields. This issue will be fixed later when client gets aware of RPC
119 * layouts. --umka
120 */
121 static int mdc_getattr_common(struct obd_export *exp,
122 struct ptlrpc_request *req)
123 {
124 struct req_capsule *pill = &req->rq_pill;
125 struct mdt_body *body;
126 void *eadata;
127 int rc;
128
129 /* Request message already built. */
130 rc = ptlrpc_queue_wait(req);
131 if (rc != 0)
132 return rc;
133
134 /* sanity check for the reply */
135 body = req_capsule_server_get(pill, &RMF_MDT_BODY);
136 if (!body)
137 return -EPROTO;
138
139 CDEBUG(D_NET, "mode: %o\n", body->mode);
140
141 mdc_update_max_ea_from_body(exp, body);
142 if (body->eadatasize != 0) {
143 eadata = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
144 body->eadatasize);
145 if (!eadata)
146 return -EPROTO;
147 }
148
149 return 0;
150 }
151
152 static int mdc_getattr(struct obd_export *exp, struct md_op_data *op_data,
153 struct ptlrpc_request **request)
154 {
155 struct ptlrpc_request *req;
156 int rc;
157
158 /* Single MDS without an LMV case */
159 if (op_data->op_flags & MF_GET_MDT_IDX) {
160 op_data->op_mds = 0;
161 return 0;
162 }
163 *request = NULL;
164 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
165 if (!req)
166 return -ENOMEM;
167
168 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
169 if (rc) {
170 ptlrpc_request_free(req);
171 return rc;
172 }
173
174 mdc_pack_body(req, &op_data->op_fid1, op_data->op_valid,
175 op_data->op_mode, -1, 0);
176
177 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
178 op_data->op_mode);
179 ptlrpc_request_set_replen(req);
180
181 rc = mdc_getattr_common(exp, req);
182 if (rc)
183 ptlrpc_req_finished(req);
184 else
185 *request = req;
186 return rc;
187 }
188
189 static int mdc_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
190 struct ptlrpc_request **request)
191 {
192 struct ptlrpc_request *req;
193 int rc;
194
195 *request = NULL;
196 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
197 &RQF_MDS_GETATTR_NAME);
198 if (!req)
199 return -ENOMEM;
200
201 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
202 op_data->op_namelen + 1);
203
204 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR_NAME);
205 if (rc) {
206 ptlrpc_request_free(req);
207 return rc;
208 }
209
210 mdc_pack_body(req, &op_data->op_fid1, op_data->op_valid,
211 op_data->op_mode, op_data->op_suppgids[0], 0);
212
213 if (op_data->op_name) {
214 char *name = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
215
216 LASSERT(strnlen(op_data->op_name, op_data->op_namelen) ==
217 op_data->op_namelen);
218 memcpy(name, op_data->op_name, op_data->op_namelen);
219 }
220
221 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
222 op_data->op_mode);
223 ptlrpc_request_set_replen(req);
224
225 rc = mdc_getattr_common(exp, req);
226 if (rc)
227 ptlrpc_req_finished(req);
228 else
229 *request = req;
230 return rc;
231 }
232
233 static int mdc_is_subdir(struct obd_export *exp,
234 const struct lu_fid *pfid,
235 const struct lu_fid *cfid,
236 struct ptlrpc_request **request)
237 {
238 struct ptlrpc_request *req;
239 int rc;
240
241 *request = NULL;
242 req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
243 &RQF_MDS_IS_SUBDIR, LUSTRE_MDS_VERSION,
244 MDS_IS_SUBDIR);
245 if (!req)
246 return -ENOMEM;
247
248 mdc_is_subdir_pack(req, pfid, cfid, 0);
249 ptlrpc_request_set_replen(req);
250
251 rc = ptlrpc_queue_wait(req);
252 if (rc && rc != -EREMOTE)
253 ptlrpc_req_finished(req);
254 else
255 *request = req;
256 return rc;
257 }
258
259 static int mdc_xattr_common(struct obd_export *exp,
260 const struct req_format *fmt,
261 const struct lu_fid *fid,
262 int opcode, u64 valid,
263 const char *xattr_name, const char *input,
264 int input_size, int output_size, int flags,
265 __u32 suppgid, struct ptlrpc_request **request)
266 {
267 struct ptlrpc_request *req;
268 int xattr_namelen = 0;
269 char *tmp;
270 int rc;
271
272 *request = NULL;
273 req = ptlrpc_request_alloc(class_exp2cliimp(exp), fmt);
274 if (!req)
275 return -ENOMEM;
276
277 if (xattr_name) {
278 xattr_namelen = strlen(xattr_name) + 1;
279 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
280 xattr_namelen);
281 }
282 if (input_size) {
283 LASSERT(input);
284 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
285 input_size);
286 }
287
288 /* Flush local XATTR locks to get rid of a possible cancel RPC */
289 if (opcode == MDS_REINT && fid_is_sane(fid) &&
290 exp->exp_connect_data.ocd_ibits_known & MDS_INODELOCK_XATTR) {
291 LIST_HEAD(cancels);
292 int count;
293
294 /* Without that packing would fail */
295 if (input_size == 0)
296 req_capsule_set_size(&req->rq_pill, &RMF_EADATA,
297 RCL_CLIENT, 0);
298
299 count = mdc_resource_get_unused(exp, fid,
300 &cancels, LCK_EX,
301 MDS_INODELOCK_XATTR);
302
303 rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
304 if (rc) {
305 ptlrpc_request_free(req);
306 return rc;
307 }
308 } else {
309 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, opcode);
310 if (rc) {
311 ptlrpc_request_free(req);
312 return rc;
313 }
314 }
315
316 if (opcode == MDS_REINT) {
317 struct mdt_rec_setxattr *rec;
318
319 CLASSERT(sizeof(struct mdt_rec_setxattr) ==
320 sizeof(struct mdt_rec_reint));
321 rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
322 rec->sx_opcode = REINT_SETXATTR;
323 rec->sx_fsuid = from_kuid(&init_user_ns, current_fsuid());
324 rec->sx_fsgid = from_kgid(&init_user_ns, current_fsgid());
325 rec->sx_cap = cfs_curproc_cap_pack();
326 rec->sx_suppgid1 = suppgid;
327 rec->sx_suppgid2 = -1;
328 rec->sx_fid = *fid;
329 rec->sx_valid = valid | OBD_MD_FLCTIME;
330 rec->sx_time = ktime_get_real_seconds();
331 rec->sx_size = output_size;
332 rec->sx_flags = flags;
333
334 } else {
335 mdc_pack_body(req, fid, valid, output_size, suppgid, flags);
336 }
337
338 if (xattr_name) {
339 tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
340 memcpy(tmp, xattr_name, xattr_namelen);
341 }
342 if (input_size) {
343 tmp = req_capsule_client_get(&req->rq_pill, &RMF_EADATA);
344 memcpy(tmp, input, input_size);
345 }
346
347 if (req_capsule_has_field(&req->rq_pill, &RMF_EADATA, RCL_SERVER))
348 req_capsule_set_size(&req->rq_pill, &RMF_EADATA,
349 RCL_SERVER, output_size);
350 ptlrpc_request_set_replen(req);
351
352 /* make rpc */
353 if (opcode == MDS_REINT)
354 mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
355
356 rc = ptlrpc_queue_wait(req);
357
358 if (opcode == MDS_REINT)
359 mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
360
361 if (rc)
362 ptlrpc_req_finished(req);
363 else
364 *request = req;
365 return rc;
366 }
367
368 static int mdc_setxattr(struct obd_export *exp, const struct lu_fid *fid,
369 u64 valid, const char *xattr_name,
370 const char *input, int input_size, int output_size,
371 int flags, __u32 suppgid,
372 struct ptlrpc_request **request)
373 {
374 return mdc_xattr_common(exp, &RQF_MDS_REINT_SETXATTR,
375 fid, MDS_REINT, valid, xattr_name,
376 input, input_size, output_size, flags,
377 suppgid, request);
378 }
379
380 static int mdc_getxattr(struct obd_export *exp, const struct lu_fid *fid,
381 u64 valid, const char *xattr_name,
382 const char *input, int input_size, int output_size,
383 int flags, struct ptlrpc_request **request)
384 {
385 return mdc_xattr_common(exp, &RQF_MDS_GETXATTR,
386 fid, MDS_GETXATTR, valid, xattr_name,
387 input, input_size, output_size, flags,
388 -1, request);
389 }
390
391 #ifdef CONFIG_FS_POSIX_ACL
392 static int mdc_unpack_acl(struct ptlrpc_request *req, struct lustre_md *md)
393 {
394 struct req_capsule *pill = &req->rq_pill;
395 struct mdt_body *body = md->body;
396 struct posix_acl *acl;
397 void *buf;
398 int rc;
399
400 if (!body->aclsize)
401 return 0;
402
403 buf = req_capsule_server_sized_get(pill, &RMF_ACL, body->aclsize);
404
405 if (!buf)
406 return -EPROTO;
407
408 acl = posix_acl_from_xattr(&init_user_ns, buf, body->aclsize);
409 if (!acl)
410 return 0;
411
412 if (IS_ERR(acl)) {
413 rc = PTR_ERR(acl);
414 CERROR("convert xattr to acl: %d\n", rc);
415 return rc;
416 }
417
418 rc = posix_acl_valid(acl);
419 if (rc) {
420 CERROR("validate acl: %d\n", rc);
421 posix_acl_release(acl);
422 return rc;
423 }
424
425 md->posix_acl = acl;
426 return 0;
427 }
428 #else
429 #define mdc_unpack_acl(req, md) 0
430 #endif
431
432 static int mdc_get_lustre_md(struct obd_export *exp,
433 struct ptlrpc_request *req,
434 struct obd_export *dt_exp,
435 struct obd_export *md_exp,
436 struct lustre_md *md)
437 {
438 struct req_capsule *pill = &req->rq_pill;
439 int rc;
440
441 LASSERT(md);
442 memset(md, 0, sizeof(*md));
443
444 md->body = req_capsule_server_get(pill, &RMF_MDT_BODY);
445
446 if (md->body->valid & OBD_MD_FLEASIZE) {
447 int lmmsize;
448 struct lov_mds_md *lmm;
449
450 if (!S_ISREG(md->body->mode)) {
451 CDEBUG(D_INFO,
452 "OBD_MD_FLEASIZE set, should be a regular file, but is not\n");
453 rc = -EPROTO;
454 goto out;
455 }
456
457 if (md->body->eadatasize == 0) {
458 CDEBUG(D_INFO,
459 "OBD_MD_FLEASIZE set, but eadatasize 0\n");
460 rc = -EPROTO;
461 goto out;
462 }
463 lmmsize = md->body->eadatasize;
464 lmm = req_capsule_server_sized_get(pill, &RMF_MDT_MD, lmmsize);
465 if (!lmm) {
466 rc = -EPROTO;
467 goto out;
468 }
469
470 rc = obd_unpackmd(dt_exp, &md->lsm, lmm, lmmsize);
471 if (rc < 0)
472 goto out;
473
474 if (rc < sizeof(*md->lsm)) {
475 CDEBUG(D_INFO,
476 "lsm size too small: rc < sizeof (*md->lsm) (%d < %d)\n",
477 rc, (int)sizeof(*md->lsm));
478 rc = -EPROTO;
479 goto out;
480 }
481
482 } else if (md->body->valid & OBD_MD_FLDIREA) {
483 int lmvsize;
484 struct lov_mds_md *lmv;
485
486 if (!S_ISDIR(md->body->mode)) {
487 CDEBUG(D_INFO,
488 "OBD_MD_FLDIREA set, should be a directory, but is not\n");
489 rc = -EPROTO;
490 goto out;
491 }
492
493 if (md->body->eadatasize == 0) {
494 CDEBUG(D_INFO,
495 "OBD_MD_FLDIREA is set, but eadatasize 0\n");
496 return -EPROTO;
497 }
498 if (md->body->valid & OBD_MD_MEA) {
499 lmvsize = md->body->eadatasize;
500 lmv = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
501 lmvsize);
502 if (!lmv) {
503 rc = -EPROTO;
504 goto out;
505 }
506
507 rc = obd_unpackmd(md_exp, (void *)&md->mea, lmv,
508 lmvsize);
509 if (rc < 0)
510 goto out;
511
512 if (rc < sizeof(*md->mea)) {
513 CDEBUG(D_INFO,
514 "size too small: rc < sizeof(*md->mea) (%d < %d)\n",
515 rc, (int)sizeof(*md->mea));
516 rc = -EPROTO;
517 goto out;
518 }
519 }
520 }
521 rc = 0;
522
523 if (md->body->valid & OBD_MD_FLACL) {
524 /* for ACL, it's possible that FLACL is set but aclsize is zero.
525 * only when aclsize != 0 there's an actual segment for ACL
526 * in reply buffer.
527 */
528 if (md->body->aclsize) {
529 rc = mdc_unpack_acl(req, md);
530 if (rc)
531 goto out;
532 #ifdef CONFIG_FS_POSIX_ACL
533 } else {
534 md->posix_acl = NULL;
535 #endif
536 }
537 }
538
539 out:
540 if (rc) {
541 #ifdef CONFIG_FS_POSIX_ACL
542 posix_acl_release(md->posix_acl);
543 #endif
544 if (md->lsm)
545 obd_free_memmd(dt_exp, &md->lsm);
546 }
547 return rc;
548 }
549
550 static int mdc_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
551 {
552 return 0;
553 }
554
555 /**
556 * Handles both OPEN and SETATTR RPCs for OPEN-CLOSE and SETATTR-DONE_WRITING
557 * RPC chains.
558 */
559 void mdc_replay_open(struct ptlrpc_request *req)
560 {
561 struct md_open_data *mod = req->rq_cb_data;
562 struct ptlrpc_request *close_req;
563 struct obd_client_handle *och;
564 struct lustre_handle old;
565 struct mdt_body *body;
566
567 if (!mod) {
568 DEBUG_REQ(D_ERROR, req,
569 "Can't properly replay without open data.");
570 return;
571 }
572
573 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
574
575 och = mod->mod_och;
576 if (och) {
577 struct lustre_handle *file_fh;
578
579 LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
580
581 file_fh = &och->och_fh;
582 CDEBUG(D_HA, "updating handle from %#llx to %#llx\n",
583 file_fh->cookie, body->handle.cookie);
584 old = *file_fh;
585 *file_fh = body->handle;
586 }
587 close_req = mod->mod_close_req;
588 if (close_req) {
589 __u32 opc = lustre_msg_get_opc(close_req->rq_reqmsg);
590 struct mdt_ioepoch *epoch;
591
592 LASSERT(opc == MDS_CLOSE || opc == MDS_DONE_WRITING);
593 epoch = req_capsule_client_get(&close_req->rq_pill,
594 &RMF_MDT_EPOCH);
595 LASSERT(epoch);
596
597 if (och)
598 LASSERT(!memcmp(&old, &epoch->handle, sizeof(old)));
599 DEBUG_REQ(D_HA, close_req, "updating close body with new fh");
600 epoch->handle = body->handle;
601 }
602 }
603
604 void mdc_commit_open(struct ptlrpc_request *req)
605 {
606 struct md_open_data *mod = req->rq_cb_data;
607
608 if (!mod)
609 return;
610
611 /**
612 * No need to touch md_open_data::mod_och, it holds a reference on
613 * \var mod and will zero references to each other, \var mod will be
614 * freed after that when md_open_data::mod_och will put the reference.
615 */
616
617 /**
618 * Do not let open request to disappear as it still may be needed
619 * for close rpc to happen (it may happen on evict only, otherwise
620 * ptlrpc_request::rq_replay does not let mdc_commit_open() to be
621 * called), just mark this rpc as committed to distinguish these 2
622 * cases, see mdc_close() for details. The open request reference will
623 * be put along with freeing \var mod.
624 */
625 ptlrpc_request_addref(req);
626 spin_lock(&req->rq_lock);
627 req->rq_committed = 1;
628 spin_unlock(&req->rq_lock);
629 req->rq_cb_data = NULL;
630 obd_mod_put(mod);
631 }
632
633 int mdc_set_open_replay_data(struct obd_export *exp,
634 struct obd_client_handle *och,
635 struct lookup_intent *it)
636 {
637 struct md_open_data *mod;
638 struct mdt_rec_create *rec;
639 struct mdt_body *body;
640 struct ptlrpc_request *open_req = it->it_request;
641 struct obd_import *imp = open_req->rq_import;
642
643 if (!open_req->rq_replay)
644 return 0;
645
646 rec = req_capsule_client_get(&open_req->rq_pill, &RMF_REC_REINT);
647 body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
648 LASSERT(rec);
649 /* Incoming message in my byte order (it's been swabbed). */
650 /* Outgoing messages always in my byte order. */
651 LASSERT(body);
652
653 /* Only if the import is replayable, we set replay_open data */
654 if (och && imp->imp_replayable) {
655 mod = obd_mod_alloc();
656 if (!mod) {
657 DEBUG_REQ(D_ERROR, open_req,
658 "Can't allocate md_open_data");
659 return 0;
660 }
661
662 /**
663 * Take a reference on \var mod, to be freed on mdc_close().
664 * It protects \var mod from being freed on eviction (commit
665 * callback is called despite rq_replay flag).
666 * Another reference for \var och.
667 */
668 obd_mod_get(mod);
669 obd_mod_get(mod);
670
671 spin_lock(&open_req->rq_lock);
672 och->och_mod = mod;
673 mod->mod_och = och;
674 mod->mod_is_create = it_disposition(it, DISP_OPEN_CREATE) ||
675 it_disposition(it, DISP_OPEN_STRIPE);
676 mod->mod_open_req = open_req;
677 open_req->rq_cb_data = mod;
678 open_req->rq_commit_cb = mdc_commit_open;
679 spin_unlock(&open_req->rq_lock);
680 }
681
682 rec->cr_fid2 = body->fid1;
683 rec->cr_ioepoch = body->ioepoch;
684 rec->cr_old_handle.cookie = body->handle.cookie;
685 open_req->rq_replay_cb = mdc_replay_open;
686 if (!fid_is_sane(&body->fid1)) {
687 DEBUG_REQ(D_ERROR, open_req,
688 "Saving replay request with insane fid");
689 LBUG();
690 }
691
692 DEBUG_REQ(D_RPCTRACE, open_req, "Set up open replay data");
693 return 0;
694 }
695
696 static void mdc_free_open(struct md_open_data *mod)
697 {
698 int committed = 0;
699
700 if (mod->mod_is_create == 0 &&
701 imp_connect_disp_stripe(mod->mod_open_req->rq_import))
702 committed = 1;
703
704 LASSERT(mod->mod_open_req->rq_replay == 0);
705
706 DEBUG_REQ(D_RPCTRACE, mod->mod_open_req, "free open request\n");
707
708 ptlrpc_request_committed(mod->mod_open_req, committed);
709 if (mod->mod_close_req)
710 ptlrpc_request_committed(mod->mod_close_req, committed);
711 }
712
713 static int mdc_clear_open_replay_data(struct obd_export *exp,
714 struct obd_client_handle *och)
715 {
716 struct md_open_data *mod = och->och_mod;
717
718 /**
719 * It is possible to not have \var mod in a case of eviction between
720 * lookup and ll_file_open().
721 **/
722 if (!mod)
723 return 0;
724
725 LASSERT(mod != LP_POISON);
726 LASSERT(mod->mod_open_req);
727 mdc_free_open(mod);
728
729 mod->mod_och = NULL;
730 och->och_mod = NULL;
731 obd_mod_put(mod);
732
733 return 0;
734 }
735
736 /* Prepares the request for the replay by the given reply */
737 static void mdc_close_handle_reply(struct ptlrpc_request *req,
738 struct md_op_data *op_data, int rc) {
739 struct mdt_body *repbody;
740 struct mdt_ioepoch *epoch;
741
742 if (req && rc == -EAGAIN) {
743 repbody = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
744 epoch = req_capsule_client_get(&req->rq_pill, &RMF_MDT_EPOCH);
745
746 epoch->flags |= MF_SOM_AU;
747 if (repbody->valid & OBD_MD_FLGETATTRLOCK)
748 op_data->op_flags |= MF_GETATTR_LOCK;
749 }
750 }
751
752 static int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
753 struct md_open_data *mod, struct ptlrpc_request **request)
754 {
755 struct obd_device *obd = class_exp2obd(exp);
756 struct ptlrpc_request *req;
757 struct req_format *req_fmt;
758 int rc;
759 int saved_rc = 0;
760
761 req_fmt = &RQF_MDS_CLOSE;
762 if (op_data->op_bias & MDS_HSM_RELEASE) {
763 req_fmt = &RQF_MDS_RELEASE_CLOSE;
764
765 /* allocate a FID for volatile file */
766 rc = mdc_fid_alloc(exp, &op_data->op_fid2, op_data);
767 if (rc < 0) {
768 CERROR("%s: "DFID" failed to allocate FID: %d\n",
769 obd->obd_name, PFID(&op_data->op_fid1), rc);
770 /* save the errcode and proceed to close */
771 saved_rc = rc;
772 }
773 }
774
775 *request = NULL;
776 req = ptlrpc_request_alloc(class_exp2cliimp(exp), req_fmt);
777 if (!req)
778 return -ENOMEM;
779
780 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_CLOSE);
781 if (rc) {
782 ptlrpc_request_free(req);
783 return rc;
784 }
785
786 /* To avoid a livelock (bug 7034), we need to send CLOSE RPCs to a
787 * portal whose threads are not taking any DLM locks and are therefore
788 * always progressing
789 */
790 req->rq_request_portal = MDS_READPAGE_PORTAL;
791 ptlrpc_at_set_req_timeout(req);
792
793 /* Ensure that this close's handle is fixed up during replay. */
794 if (likely(mod)) {
795 LASSERTF(mod->mod_open_req &&
796 mod->mod_open_req->rq_type != LI_POISON,
797 "POISONED open %p!\n", mod->mod_open_req);
798
799 mod->mod_close_req = req;
800
801 DEBUG_REQ(D_HA, mod->mod_open_req, "matched open");
802 /* We no longer want to preserve this open for replay even
803 * though the open was committed. b=3632, b=3633
804 */
805 spin_lock(&mod->mod_open_req->rq_lock);
806 mod->mod_open_req->rq_replay = 0;
807 spin_unlock(&mod->mod_open_req->rq_lock);
808 } else {
809 CDEBUG(D_HA,
810 "couldn't find open req; expecting close error\n");
811 }
812
813 mdc_close_pack(req, op_data);
814
815 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
816 obd->u.cli.cl_default_mds_easize);
817 req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_SERVER,
818 obd->u.cli.cl_default_mds_cookiesize);
819
820 ptlrpc_request_set_replen(req);
821
822 mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
823 rc = ptlrpc_queue_wait(req);
824 mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
825
826 if (!req->rq_repmsg) {
827 CDEBUG(D_RPCTRACE, "request failed to send: %p, %d\n", req,
828 req->rq_status);
829 if (rc == 0)
830 rc = req->rq_status ?: -EIO;
831 } else if (rc == 0 || rc == -EAGAIN) {
832 struct mdt_body *body;
833
834 rc = lustre_msg_get_status(req->rq_repmsg);
835 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
836 DEBUG_REQ(D_ERROR, req,
837 "type == PTL_RPC_MSG_ERR, err = %d", rc);
838 if (rc > 0)
839 rc = -rc;
840 }
841 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
842 if (!body)
843 rc = -EPROTO;
844 } else if (rc == -ESTALE) {
845 /**
846 * it can be allowed error after 3633 if open was committed and
847 * server failed before close was sent. Let's check if mod
848 * exists and return no error in that case
849 */
850 if (mod) {
851 DEBUG_REQ(D_HA, req, "Reset ESTALE = %d", rc);
852 if (mod->mod_open_req->rq_committed)
853 rc = 0;
854 }
855 }
856
857 if (mod) {
858 if (rc != 0)
859 mod->mod_close_req = NULL;
860 /* Since now, mod is accessed through open_req only,
861 * thus close req does not keep a reference on mod anymore.
862 */
863 obd_mod_put(mod);
864 }
865 *request = req;
866 mdc_close_handle_reply(req, op_data, rc);
867 return rc < 0 ? rc : saved_rc;
868 }
869
870 static int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
871 struct md_open_data *mod)
872 {
873 struct obd_device *obd = class_exp2obd(exp);
874 struct ptlrpc_request *req;
875 int rc;
876
877 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
878 &RQF_MDS_DONE_WRITING);
879 if (!req)
880 return -ENOMEM;
881
882 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_DONE_WRITING);
883 if (rc) {
884 ptlrpc_request_free(req);
885 return rc;
886 }
887
888 if (mod) {
889 LASSERTF(mod->mod_open_req &&
890 mod->mod_open_req->rq_type != LI_POISON,
891 "POISONED setattr %p!\n", mod->mod_open_req);
892
893 mod->mod_close_req = req;
894 DEBUG_REQ(D_HA, mod->mod_open_req, "matched setattr");
895 /* We no longer want to preserve this setattr for replay even
896 * though the open was committed. b=3632, b=3633
897 */
898 spin_lock(&mod->mod_open_req->rq_lock);
899 mod->mod_open_req->rq_replay = 0;
900 spin_unlock(&mod->mod_open_req->rq_lock);
901 }
902
903 mdc_close_pack(req, op_data);
904 ptlrpc_request_set_replen(req);
905
906 mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
907 rc = ptlrpc_queue_wait(req);
908 mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
909
910 if (rc == -ESTALE) {
911 /**
912 * it can be allowed error after 3633 if open or setattr were
913 * committed and server failed before close was sent.
914 * Let's check if mod exists and return no error in that case
915 */
916 if (mod) {
917 if (mod->mod_open_req->rq_committed)
918 rc = 0;
919 }
920 }
921
922 if (mod) {
923 if (rc != 0)
924 mod->mod_close_req = NULL;
925 LASSERT(mod->mod_open_req);
926 mdc_free_open(mod);
927
928 /* Since now, mod is accessed through setattr req only,
929 * thus DW req does not keep a reference on mod anymore.
930 */
931 obd_mod_put(mod);
932 }
933
934 mdc_close_handle_reply(req, op_data, rc);
935 ptlrpc_req_finished(req);
936 return rc;
937 }
938
939 static int mdc_readpage(struct obd_export *exp, struct md_op_data *op_data,
940 struct page **pages, struct ptlrpc_request **request)
941 {
942 struct ptlrpc_request *req;
943 struct ptlrpc_bulk_desc *desc;
944 int i;
945 wait_queue_head_t waitq;
946 int resends = 0;
947 struct l_wait_info lwi;
948 int rc;
949
950 *request = NULL;
951 init_waitqueue_head(&waitq);
952
953 restart_bulk:
954 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_READPAGE);
955 if (!req)
956 return -ENOMEM;
957
958 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_READPAGE);
959 if (rc) {
960 ptlrpc_request_free(req);
961 return rc;
962 }
963
964 req->rq_request_portal = MDS_READPAGE_PORTAL;
965 ptlrpc_at_set_req_timeout(req);
966
967 desc = ptlrpc_prep_bulk_imp(req, op_data->op_npages, 1, BULK_PUT_SINK,
968 MDS_BULK_PORTAL);
969 if (!desc) {
970 ptlrpc_request_free(req);
971 return -ENOMEM;
972 }
973
974 /* NB req now owns desc and will free it when it gets freed */
975 for (i = 0; i < op_data->op_npages; i++)
976 ptlrpc_prep_bulk_page_pin(desc, pages[i], 0, PAGE_SIZE);
977
978 mdc_readdir_pack(req, op_data->op_offset,
979 PAGE_SIZE * op_data->op_npages,
980 &op_data->op_fid1);
981
982 ptlrpc_request_set_replen(req);
983 rc = ptlrpc_queue_wait(req);
984 if (rc) {
985 ptlrpc_req_finished(req);
986 if (rc != -ETIMEDOUT)
987 return rc;
988
989 resends++;
990 if (!client_should_resend(resends, &exp->exp_obd->u.cli)) {
991 CERROR("too many resend retries, returning error\n");
992 return -EIO;
993 }
994 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends),
995 NULL, NULL, NULL);
996 l_wait_event(waitq, 0, &lwi);
997
998 goto restart_bulk;
999 }
1000
1001 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk,
1002 req->rq_bulk->bd_nob_transferred);
1003 if (rc < 0) {
1004 ptlrpc_req_finished(req);
1005 return rc;
1006 }
1007
1008 if (req->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK) {
1009 CERROR("Unexpected # bytes transferred: %d (%ld expected)\n",
1010 req->rq_bulk->bd_nob_transferred,
1011 PAGE_SIZE * op_data->op_npages);
1012 ptlrpc_req_finished(req);
1013 return -EPROTO;
1014 }
1015
1016 *request = req;
1017 return 0;
1018 }
1019
1020 static int mdc_statfs(const struct lu_env *env,
1021 struct obd_export *exp, struct obd_statfs *osfs,
1022 __u64 max_age, __u32 flags)
1023 {
1024 struct obd_device *obd = class_exp2obd(exp);
1025 struct ptlrpc_request *req;
1026 struct obd_statfs *msfs;
1027 struct obd_import *imp = NULL;
1028 int rc;
1029
1030 /*
1031 * Since the request might also come from lprocfs, so we need
1032 * sync this with client_disconnect_export Bug15684
1033 */
1034 down_read(&obd->u.cli.cl_sem);
1035 if (obd->u.cli.cl_import)
1036 imp = class_import_get(obd->u.cli.cl_import);
1037 up_read(&obd->u.cli.cl_sem);
1038 if (!imp)
1039 return -ENODEV;
1040
1041 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_STATFS,
1042 LUSTRE_MDS_VERSION, MDS_STATFS);
1043 if (!req) {
1044 rc = -ENOMEM;
1045 goto output;
1046 }
1047
1048 ptlrpc_request_set_replen(req);
1049
1050 if (flags & OBD_STATFS_NODELAY) {
1051 /* procfs requests not want stay in wait for avoid deadlock */
1052 req->rq_no_resend = 1;
1053 req->rq_no_delay = 1;
1054 }
1055
1056 rc = ptlrpc_queue_wait(req);
1057 if (rc) {
1058 /* check connection error first */
1059 if (imp->imp_connect_error)
1060 rc = imp->imp_connect_error;
1061 goto out;
1062 }
1063
1064 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
1065 if (!msfs) {
1066 rc = -EPROTO;
1067 goto out;
1068 }
1069
1070 *osfs = *msfs;
1071 out:
1072 ptlrpc_req_finished(req);
1073 output:
1074 class_import_put(imp);
1075 return rc;
1076 }
1077
1078 static int mdc_ioc_fid2path(struct obd_export *exp, struct getinfo_fid2path *gf)
1079 {
1080 __u32 keylen, vallen;
1081 void *key;
1082 int rc;
1083
1084 if (gf->gf_pathlen > PATH_MAX)
1085 return -ENAMETOOLONG;
1086 if (gf->gf_pathlen < 2)
1087 return -EOVERFLOW;
1088
1089 /* Key is KEY_FID2PATH + getinfo_fid2path description */
1090 keylen = cfs_size_round(sizeof(KEY_FID2PATH)) + sizeof(*gf);
1091 key = kzalloc(keylen, GFP_NOFS);
1092 if (!key)
1093 return -ENOMEM;
1094 memcpy(key, KEY_FID2PATH, sizeof(KEY_FID2PATH));
1095 memcpy(key + cfs_size_round(sizeof(KEY_FID2PATH)), gf, sizeof(*gf));
1096
1097 CDEBUG(D_IOCTL, "path get "DFID" from %llu #%d\n",
1098 PFID(&gf->gf_fid), gf->gf_recno, gf->gf_linkno);
1099
1100 if (!fid_is_sane(&gf->gf_fid)) {
1101 rc = -EINVAL;
1102 goto out;
1103 }
1104
1105 /* Val is struct getinfo_fid2path result plus path */
1106 vallen = sizeof(*gf) + gf->gf_pathlen;
1107
1108 rc = obd_get_info(NULL, exp, keylen, key, &vallen, gf, NULL);
1109 if (rc != 0 && rc != -EREMOTE)
1110 goto out;
1111
1112 if (vallen <= sizeof(*gf)) {
1113 rc = -EPROTO;
1114 goto out;
1115 } else if (vallen > sizeof(*gf) + gf->gf_pathlen) {
1116 rc = -EOVERFLOW;
1117 goto out;
1118 }
1119
1120 CDEBUG(D_IOCTL, "path get "DFID" from %llu #%d\n%s\n",
1121 PFID(&gf->gf_fid), gf->gf_recno, gf->gf_linkno, gf->gf_path);
1122
1123 out:
1124 kfree(key);
1125 return rc;
1126 }
1127
1128 static int mdc_ioc_hsm_progress(struct obd_export *exp,
1129 struct hsm_progress_kernel *hpk)
1130 {
1131 struct obd_import *imp = class_exp2cliimp(exp);
1132 struct hsm_progress_kernel *req_hpk;
1133 struct ptlrpc_request *req;
1134 int rc;
1135
1136 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_PROGRESS,
1137 LUSTRE_MDS_VERSION, MDS_HSM_PROGRESS);
1138 if (!req) {
1139 rc = -ENOMEM;
1140 goto out;
1141 }
1142
1143 mdc_pack_body(req, NULL, 0, 0, -1, 0);
1144
1145 /* Copy hsm_progress struct */
1146 req_hpk = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_PROGRESS);
1147 if (!req_hpk) {
1148 rc = -EPROTO;
1149 goto out;
1150 }
1151
1152 *req_hpk = *hpk;
1153 req_hpk->hpk_errval = lustre_errno_hton(hpk->hpk_errval);
1154
1155 ptlrpc_request_set_replen(req);
1156
1157 rc = mdc_queue_wait(req);
1158 out:
1159 ptlrpc_req_finished(req);
1160 return rc;
1161 }
1162
1163 static int mdc_ioc_hsm_ct_register(struct obd_import *imp, __u32 archives)
1164 {
1165 __u32 *archive_mask;
1166 struct ptlrpc_request *req;
1167 int rc;
1168
1169 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_CT_REGISTER,
1170 LUSTRE_MDS_VERSION,
1171 MDS_HSM_CT_REGISTER);
1172 if (!req) {
1173 rc = -ENOMEM;
1174 goto out;
1175 }
1176
1177 mdc_pack_body(req, NULL, 0, 0, -1, 0);
1178
1179 /* Copy hsm_progress struct */
1180 archive_mask = req_capsule_client_get(&req->rq_pill,
1181 &RMF_MDS_HSM_ARCHIVE);
1182 if (!archive_mask) {
1183 rc = -EPROTO;
1184 goto out;
1185 }
1186
1187 *archive_mask = archives;
1188
1189 ptlrpc_request_set_replen(req);
1190
1191 rc = mdc_queue_wait(req);
1192 out:
1193 ptlrpc_req_finished(req);
1194 return rc;
1195 }
1196
1197 static int mdc_ioc_hsm_current_action(struct obd_export *exp,
1198 struct md_op_data *op_data)
1199 {
1200 struct hsm_current_action *hca = op_data->op_data;
1201 struct hsm_current_action *req_hca;
1202 struct ptlrpc_request *req;
1203 int rc;
1204
1205 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
1206 &RQF_MDS_HSM_ACTION);
1207 if (!req)
1208 return -ENOMEM;
1209
1210 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_ACTION);
1211 if (rc) {
1212 ptlrpc_request_free(req);
1213 return rc;
1214 }
1215
1216 mdc_pack_body(req, &op_data->op_fid1, 0, 0,
1217 op_data->op_suppgids[0], 0);
1218
1219 ptlrpc_request_set_replen(req);
1220
1221 rc = mdc_queue_wait(req);
1222 if (rc)
1223 goto out;
1224
1225 req_hca = req_capsule_server_get(&req->rq_pill,
1226 &RMF_MDS_HSM_CURRENT_ACTION);
1227 if (!req_hca) {
1228 rc = -EPROTO;
1229 goto out;
1230 }
1231
1232 *hca = *req_hca;
1233
1234 out:
1235 ptlrpc_req_finished(req);
1236 return rc;
1237 }
1238
1239 static int mdc_ioc_hsm_ct_unregister(struct obd_import *imp)
1240 {
1241 struct ptlrpc_request *req;
1242 int rc;
1243
1244 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_CT_UNREGISTER,
1245 LUSTRE_MDS_VERSION,
1246 MDS_HSM_CT_UNREGISTER);
1247 if (!req) {
1248 rc = -ENOMEM;
1249 goto out;
1250 }
1251
1252 mdc_pack_body(req, NULL, 0, 0, -1, 0);
1253
1254 ptlrpc_request_set_replen(req);
1255
1256 rc = mdc_queue_wait(req);
1257 out:
1258 ptlrpc_req_finished(req);
1259 return rc;
1260 }
1261
1262 static int mdc_ioc_hsm_state_get(struct obd_export *exp,
1263 struct md_op_data *op_data)
1264 {
1265 struct hsm_user_state *hus = op_data->op_data;
1266 struct hsm_user_state *req_hus;
1267 struct ptlrpc_request *req;
1268 int rc;
1269
1270 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
1271 &RQF_MDS_HSM_STATE_GET);
1272 if (!req)
1273 return -ENOMEM;
1274
1275 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_STATE_GET);
1276 if (rc != 0) {
1277 ptlrpc_request_free(req);
1278 return rc;
1279 }
1280
1281 mdc_pack_body(req, &op_data->op_fid1, 0, 0,
1282 op_data->op_suppgids[0], 0);
1283
1284 ptlrpc_request_set_replen(req);
1285
1286 rc = mdc_queue_wait(req);
1287 if (rc)
1288 goto out;
1289
1290 req_hus = req_capsule_server_get(&req->rq_pill, &RMF_HSM_USER_STATE);
1291 if (!req_hus) {
1292 rc = -EPROTO;
1293 goto out;
1294 }
1295
1296 *hus = *req_hus;
1297
1298 out:
1299 ptlrpc_req_finished(req);
1300 return rc;
1301 }
1302
1303 static int mdc_ioc_hsm_state_set(struct obd_export *exp,
1304 struct md_op_data *op_data)
1305 {
1306 struct hsm_state_set *hss = op_data->op_data;
1307 struct hsm_state_set *req_hss;
1308 struct ptlrpc_request *req;
1309 int rc;
1310
1311 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
1312 &RQF_MDS_HSM_STATE_SET);
1313 if (!req)
1314 return -ENOMEM;
1315
1316 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_STATE_SET);
1317 if (rc) {
1318 ptlrpc_request_free(req);
1319 return rc;
1320 }
1321
1322 mdc_pack_body(req, &op_data->op_fid1, 0, 0,
1323 op_data->op_suppgids[0], 0);
1324
1325 /* Copy states */
1326 req_hss = req_capsule_client_get(&req->rq_pill, &RMF_HSM_STATE_SET);
1327 if (!req_hss) {
1328 rc = -EPROTO;
1329 goto out;
1330 }
1331 *req_hss = *hss;
1332
1333 ptlrpc_request_set_replen(req);
1334
1335 rc = mdc_queue_wait(req);
1336 out:
1337 ptlrpc_req_finished(req);
1338 return rc;
1339 }
1340
1341 static int mdc_ioc_hsm_request(struct obd_export *exp,
1342 struct hsm_user_request *hur)
1343 {
1344 struct obd_import *imp = class_exp2cliimp(exp);
1345 struct ptlrpc_request *req;
1346 struct hsm_request *req_hr;
1347 struct hsm_user_item *req_hui;
1348 char *req_opaque;
1349 int rc;
1350
1351 req = ptlrpc_request_alloc(imp, &RQF_MDS_HSM_REQUEST);
1352 if (!req) {
1353 rc = -ENOMEM;
1354 goto out;
1355 }
1356
1357 req_capsule_set_size(&req->rq_pill, &RMF_MDS_HSM_USER_ITEM, RCL_CLIENT,
1358 hur->hur_request.hr_itemcount
1359 * sizeof(struct hsm_user_item));
1360 req_capsule_set_size(&req->rq_pill, &RMF_GENERIC_DATA, RCL_CLIENT,
1361 hur->hur_request.hr_data_len);
1362
1363 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_REQUEST);
1364 if (rc) {
1365 ptlrpc_request_free(req);
1366 return rc;
1367 }
1368
1369 mdc_pack_body(req, NULL, 0, 0, -1, 0);
1370
1371 /* Copy hsm_request struct */
1372 req_hr = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_REQUEST);
1373 if (!req_hr) {
1374 rc = -EPROTO;
1375 goto out;
1376 }
1377 *req_hr = hur->hur_request;
1378
1379 /* Copy hsm_user_item structs */
1380 req_hui = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_USER_ITEM);
1381 if (!req_hui) {
1382 rc = -EPROTO;
1383 goto out;
1384 }
1385 memcpy(req_hui, hur->hur_user_item,
1386 hur->hur_request.hr_itemcount * sizeof(struct hsm_user_item));
1387
1388 /* Copy opaque field */
1389 req_opaque = req_capsule_client_get(&req->rq_pill, &RMF_GENERIC_DATA);
1390 if (!req_opaque) {
1391 rc = -EPROTO;
1392 goto out;
1393 }
1394 memcpy(req_opaque, hur_data(hur), hur->hur_request.hr_data_len);
1395
1396 ptlrpc_request_set_replen(req);
1397
1398 rc = mdc_queue_wait(req);
1399 out:
1400 ptlrpc_req_finished(req);
1401 return rc;
1402 }
1403
1404 static struct kuc_hdr *changelog_kuc_hdr(char *buf, int len, int flags)
1405 {
1406 struct kuc_hdr *lh = (struct kuc_hdr *)buf;
1407
1408 LASSERT(len <= KUC_CHANGELOG_MSG_MAXSIZE);
1409
1410 lh->kuc_magic = KUC_MAGIC;
1411 lh->kuc_transport = KUC_TRANSPORT_CHANGELOG;
1412 lh->kuc_flags = flags;
1413 lh->kuc_msgtype = CL_RECORD;
1414 lh->kuc_msglen = len;
1415 return lh;
1416 }
1417
1418 #define D_CHANGELOG 0
1419
1420 struct changelog_show {
1421 __u64 cs_startrec;
1422 __u32 cs_flags;
1423 struct file *cs_fp;
1424 char *cs_buf;
1425 struct obd_device *cs_obd;
1426 };
1427
1428 static int changelog_kkuc_cb(const struct lu_env *env, struct llog_handle *llh,
1429 struct llog_rec_hdr *hdr, void *data)
1430 {
1431 struct changelog_show *cs = data;
1432 struct llog_changelog_rec *rec = (struct llog_changelog_rec *)hdr;
1433 struct kuc_hdr *lh;
1434 int len, rc;
1435
1436 if (rec->cr_hdr.lrh_type != CHANGELOG_REC) {
1437 rc = -EINVAL;
1438 CERROR("%s: not a changelog rec %x/%d: rc = %d\n",
1439 cs->cs_obd->obd_name, rec->cr_hdr.lrh_type,
1440 rec->cr.cr_type, rc);
1441 return rc;
1442 }
1443
1444 if (rec->cr.cr_index < cs->cs_startrec) {
1445 /* Skip entries earlier than what we are interested in */
1446 CDEBUG(D_CHANGELOG, "rec=%llu start=%llu\n",
1447 rec->cr.cr_index, cs->cs_startrec);
1448 return 0;
1449 }
1450
1451 CDEBUG(D_CHANGELOG, "%llu %02d%-5s %llu 0x%x t="DFID" p="DFID
1452 " %.*s\n", rec->cr.cr_index, rec->cr.cr_type,
1453 changelog_type2str(rec->cr.cr_type), rec->cr.cr_time,
1454 rec->cr.cr_flags & CLF_FLAGMASK,
1455 PFID(&rec->cr.cr_tfid), PFID(&rec->cr.cr_pfid),
1456 rec->cr.cr_namelen, changelog_rec_name(&rec->cr));
1457
1458 len = sizeof(*lh) + changelog_rec_size(&rec->cr) + rec->cr.cr_namelen;
1459
1460 /* Set up the message */
1461 lh = changelog_kuc_hdr(cs->cs_buf, len, cs->cs_flags);
1462 memcpy(lh + 1, &rec->cr, len - sizeof(*lh));
1463
1464 rc = libcfs_kkuc_msg_put(cs->cs_fp, lh);
1465 CDEBUG(D_CHANGELOG, "kucmsg fp %p len %d rc %d\n", cs->cs_fp, len, rc);
1466
1467 return rc;
1468 }
1469
1470 static int mdc_changelog_send_thread(void *csdata)
1471 {
1472 struct changelog_show *cs = csdata;
1473 struct llog_ctxt *ctxt = NULL;
1474 struct llog_handle *llh = NULL;
1475 struct kuc_hdr *kuch;
1476 int rc;
1477
1478 CDEBUG(D_CHANGELOG, "changelog to fp=%p start %llu\n",
1479 cs->cs_fp, cs->cs_startrec);
1480
1481 cs->cs_buf = kzalloc(KUC_CHANGELOG_MSG_MAXSIZE, GFP_NOFS);
1482 if (!cs->cs_buf) {
1483 rc = -ENOMEM;
1484 goto out;
1485 }
1486
1487 /* Set up the remote catalog handle */
1488 ctxt = llog_get_context(cs->cs_obd, LLOG_CHANGELOG_REPL_CTXT);
1489 if (!ctxt) {
1490 rc = -ENOENT;
1491 goto out;
1492 }
1493 rc = llog_open(NULL, ctxt, &llh, NULL, CHANGELOG_CATALOG,
1494 LLOG_OPEN_EXISTS);
1495 if (rc) {
1496 CERROR("%s: fail to open changelog catalog: rc = %d\n",
1497 cs->cs_obd->obd_name, rc);
1498 goto out;
1499 }
1500 rc = llog_init_handle(NULL, llh, LLOG_F_IS_CAT, NULL);
1501 if (rc) {
1502 CERROR("llog_init_handle failed %d\n", rc);
1503 goto out;
1504 }
1505
1506 rc = llog_cat_process(NULL, llh, changelog_kkuc_cb, cs, 0, 0);
1507
1508 /* Send EOF no matter what our result */
1509 kuch = changelog_kuc_hdr(cs->cs_buf, sizeof(*kuch), cs->cs_flags);
1510 if (kuch) {
1511 kuch->kuc_msgtype = CL_EOF;
1512 libcfs_kkuc_msg_put(cs->cs_fp, kuch);
1513 }
1514
1515 out:
1516 fput(cs->cs_fp);
1517 if (llh)
1518 llog_cat_close(NULL, llh);
1519 if (ctxt)
1520 llog_ctxt_put(ctxt);
1521 kfree(cs->cs_buf);
1522 kfree(cs);
1523 return rc;
1524 }
1525
1526 static int mdc_ioc_changelog_send(struct obd_device *obd,
1527 struct ioc_changelog *icc)
1528 {
1529 struct changelog_show *cs;
1530 struct task_struct *task;
1531 int rc;
1532
1533 /* Freed in mdc_changelog_send_thread */
1534 cs = kzalloc(sizeof(*cs), GFP_NOFS);
1535 if (!cs)
1536 return -ENOMEM;
1537
1538 cs->cs_obd = obd;
1539 cs->cs_startrec = icc->icc_recno;
1540 /* matching fput in mdc_changelog_send_thread */
1541 cs->cs_fp = fget(icc->icc_id);
1542 cs->cs_flags = icc->icc_flags;
1543
1544 /*
1545 * New thread because we should return to user app before
1546 * writing into our pipe
1547 */
1548 task = kthread_run(mdc_changelog_send_thread, cs,
1549 "mdc_clg_send_thread");
1550 if (IS_ERR(task)) {
1551 rc = PTR_ERR(task);
1552 CERROR("%s: can't start changelog thread: rc = %d\n",
1553 obd->obd_name, rc);
1554 kfree(cs);
1555 } else {
1556 rc = 0;
1557 CDEBUG(D_CHANGELOG, "%s: started changelog thread\n",
1558 obd->obd_name);
1559 }
1560
1561 CERROR("Failed to start changelog thread: %d\n", rc);
1562 return rc;
1563 }
1564
1565 static int mdc_ioc_hsm_ct_start(struct obd_export *exp,
1566 struct lustre_kernelcomm *lk);
1567
1568 static int mdc_quotacheck(struct obd_device *unused, struct obd_export *exp,
1569 struct obd_quotactl *oqctl)
1570 {
1571 struct client_obd *cli = &exp->exp_obd->u.cli;
1572 struct ptlrpc_request *req;
1573 struct obd_quotactl *body;
1574 int rc;
1575
1576 req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
1577 &RQF_MDS_QUOTACHECK, LUSTRE_MDS_VERSION,
1578 MDS_QUOTACHECK);
1579 if (!req)
1580 return -ENOMEM;
1581
1582 body = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1583 *body = *oqctl;
1584
1585 ptlrpc_request_set_replen(req);
1586
1587 /* the next poll will find -ENODATA, that means quotacheck is
1588 * going on
1589 */
1590 cli->cl_qchk_stat = -ENODATA;
1591 rc = ptlrpc_queue_wait(req);
1592 if (rc)
1593 cli->cl_qchk_stat = rc;
1594 ptlrpc_req_finished(req);
1595 return rc;
1596 }
1597
1598 static int mdc_quota_poll_check(struct obd_export *exp,
1599 struct if_quotacheck *qchk)
1600 {
1601 struct client_obd *cli = &exp->exp_obd->u.cli;
1602 int rc;
1603
1604 qchk->obd_uuid = cli->cl_target_uuid;
1605 memcpy(qchk->obd_type, LUSTRE_MDS_NAME, strlen(LUSTRE_MDS_NAME));
1606
1607 rc = cli->cl_qchk_stat;
1608 /* the client is not the previous one */
1609 if (rc == CL_NOT_QUOTACHECKED)
1610 rc = -EINTR;
1611 return rc;
1612 }
1613
1614 static int mdc_quotactl(struct obd_device *unused, struct obd_export *exp,
1615 struct obd_quotactl *oqctl)
1616 {
1617 struct ptlrpc_request *req;
1618 struct obd_quotactl *oqc;
1619 int rc;
1620
1621 req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
1622 &RQF_MDS_QUOTACTL, LUSTRE_MDS_VERSION,
1623 MDS_QUOTACTL);
1624 if (!req)
1625 return -ENOMEM;
1626
1627 oqc = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1628 *oqc = *oqctl;
1629
1630 ptlrpc_request_set_replen(req);
1631 ptlrpc_at_set_req_timeout(req);
1632 req->rq_no_resend = 1;
1633
1634 rc = ptlrpc_queue_wait(req);
1635 if (rc)
1636 CERROR("ptlrpc_queue_wait failed, rc: %d\n", rc);
1637
1638 if (req->rq_repmsg) {
1639 oqc = req_capsule_server_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1640 if (oqc) {
1641 *oqctl = *oqc;
1642 } else if (!rc) {
1643 CERROR("Can't unpack obd_quotactl\n");
1644 rc = -EPROTO;
1645 }
1646 } else if (!rc) {
1647 CERROR("Can't unpack obd_quotactl\n");
1648 rc = -EPROTO;
1649 }
1650 ptlrpc_req_finished(req);
1651
1652 return rc;
1653 }
1654
1655 static int mdc_ioc_swap_layouts(struct obd_export *exp,
1656 struct md_op_data *op_data)
1657 {
1658 LIST_HEAD(cancels);
1659 struct ptlrpc_request *req;
1660 int rc, count;
1661 struct mdc_swap_layouts *msl, *payload;
1662
1663 msl = op_data->op_data;
1664
1665 /* When the MDT will get the MDS_SWAP_LAYOUTS RPC the
1666 * first thing it will do is to cancel the 2 layout
1667 * locks hold by this client.
1668 * So the client must cancel its layout locks on the 2 fids
1669 * with the request RPC to avoid extra RPC round trips
1670 */
1671 count = mdc_resource_get_unused(exp, &op_data->op_fid1, &cancels,
1672 LCK_CR, MDS_INODELOCK_LAYOUT);
1673 count += mdc_resource_get_unused(exp, &op_data->op_fid2, &cancels,
1674 LCK_CR, MDS_INODELOCK_LAYOUT);
1675
1676 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
1677 &RQF_MDS_SWAP_LAYOUTS);
1678 if (!req) {
1679 ldlm_lock_list_put(&cancels, l_bl_ast, count);
1680 return -ENOMEM;
1681 }
1682
1683 rc = mdc_prep_elc_req(exp, req, MDS_SWAP_LAYOUTS, &cancels, count);
1684 if (rc) {
1685 ptlrpc_request_free(req);
1686 return rc;
1687 }
1688
1689 mdc_swap_layouts_pack(req, op_data);
1690
1691 payload = req_capsule_client_get(&req->rq_pill, &RMF_SWAP_LAYOUTS);
1692 LASSERT(payload);
1693
1694 *payload = *msl;
1695
1696 ptlrpc_request_set_replen(req);
1697
1698 rc = ptlrpc_queue_wait(req);
1699
1700 ptlrpc_req_finished(req);
1701 return rc;
1702 }
1703
1704 static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1705 void *karg, void __user *uarg)
1706 {
1707 struct obd_device *obd = exp->exp_obd;
1708 struct obd_ioctl_data *data = karg;
1709 struct obd_import *imp = obd->u.cli.cl_import;
1710 int rc;
1711
1712 if (!try_module_get(THIS_MODULE)) {
1713 CERROR("%s: cannot get module '%s'\n", obd->obd_name,
1714 module_name(THIS_MODULE));
1715 return -EINVAL;
1716 }
1717 switch (cmd) {
1718 case OBD_IOC_CHANGELOG_SEND:
1719 rc = mdc_ioc_changelog_send(obd, karg);
1720 goto out;
1721 case OBD_IOC_CHANGELOG_CLEAR: {
1722 struct ioc_changelog *icc = karg;
1723 struct changelog_setinfo cs = {
1724 .cs_recno = icc->icc_recno,
1725 .cs_id = icc->icc_id
1726 };
1727
1728 rc = obd_set_info_async(NULL, exp, strlen(KEY_CHANGELOG_CLEAR),
1729 KEY_CHANGELOG_CLEAR, sizeof(cs), &cs,
1730 NULL);
1731 goto out;
1732 }
1733 case OBD_IOC_FID2PATH:
1734 rc = mdc_ioc_fid2path(exp, karg);
1735 goto out;
1736 case LL_IOC_HSM_CT_START:
1737 rc = mdc_ioc_hsm_ct_start(exp, karg);
1738 /* ignore if it was already registered on this MDS. */
1739 if (rc == -EEXIST)
1740 rc = 0;
1741 goto out;
1742 case LL_IOC_HSM_PROGRESS:
1743 rc = mdc_ioc_hsm_progress(exp, karg);
1744 goto out;
1745 case LL_IOC_HSM_STATE_GET:
1746 rc = mdc_ioc_hsm_state_get(exp, karg);
1747 goto out;
1748 case LL_IOC_HSM_STATE_SET:
1749 rc = mdc_ioc_hsm_state_set(exp, karg);
1750 goto out;
1751 case LL_IOC_HSM_ACTION:
1752 rc = mdc_ioc_hsm_current_action(exp, karg);
1753 goto out;
1754 case LL_IOC_HSM_REQUEST:
1755 rc = mdc_ioc_hsm_request(exp, karg);
1756 goto out;
1757 case OBD_IOC_CLIENT_RECOVER:
1758 rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1, 0);
1759 if (rc < 0)
1760 goto out;
1761 rc = 0;
1762 goto out;
1763 case IOC_OSC_SET_ACTIVE:
1764 rc = ptlrpc_set_import_active(imp, data->ioc_offset);
1765 goto out;
1766 case OBD_IOC_POLL_QUOTACHECK:
1767 rc = mdc_quota_poll_check(exp, (struct if_quotacheck *)karg);
1768 goto out;
1769 case OBD_IOC_PING_TARGET:
1770 rc = ptlrpc_obd_ping(obd);
1771 goto out;
1772 /*
1773 * Normally IOC_OBD_STATFS, OBD_IOC_QUOTACTL iocontrol are handled by
1774 * LMV instead of MDC. But when the cluster is upgraded from 1.8,
1775 * there'd be no LMV layer thus we might be called here. Eventually
1776 * this code should be removed.
1777 * bz20731, LU-592.
1778 */
1779 case IOC_OBD_STATFS: {
1780 struct obd_statfs stat_buf = {0};
1781
1782 if (*((__u32 *)data->ioc_inlbuf2) != 0) {
1783 rc = -ENODEV;
1784 goto out;
1785 }
1786
1787 /* copy UUID */
1788 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(obd),
1789 min_t(size_t, data->ioc_plen2,
1790 sizeof(struct obd_uuid)))) {
1791 rc = -EFAULT;
1792 goto out;
1793 }
1794
1795 rc = mdc_statfs(NULL, obd->obd_self_export, &stat_buf,
1796 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1797 0);
1798 if (rc != 0)
1799 goto out;
1800
1801 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
1802 min_t(size_t, data->ioc_plen1,
1803 sizeof(stat_buf)))) {
1804 rc = -EFAULT;
1805 goto out;
1806 }
1807
1808 rc = 0;
1809 goto out;
1810 }
1811 case OBD_IOC_QUOTACTL: {
1812 struct if_quotactl *qctl = karg;
1813 struct obd_quotactl *oqctl;
1814
1815 oqctl = kzalloc(sizeof(*oqctl), GFP_NOFS);
1816 if (!oqctl) {
1817 rc = -ENOMEM;
1818 goto out;
1819 }
1820
1821 QCTL_COPY(oqctl, qctl);
1822 rc = obd_quotactl(exp, oqctl);
1823 if (rc == 0) {
1824 QCTL_COPY(qctl, oqctl);
1825 qctl->qc_valid = QC_MDTIDX;
1826 qctl->obd_uuid = obd->u.cli.cl_target_uuid;
1827 }
1828
1829 kfree(oqctl);
1830 goto out;
1831 }
1832 case LL_IOC_GET_CONNECT_FLAGS:
1833 if (copy_to_user(uarg, exp_connect_flags_ptr(exp),
1834 sizeof(*exp_connect_flags_ptr(exp)))) {
1835 rc = -EFAULT;
1836 goto out;
1837 }
1838
1839 rc = 0;
1840 goto out;
1841 case LL_IOC_LOV_SWAP_LAYOUTS:
1842 rc = mdc_ioc_swap_layouts(exp, karg);
1843 goto out;
1844 default:
1845 CERROR("unrecognised ioctl: cmd = %#x\n", cmd);
1846 rc = -ENOTTY;
1847 goto out;
1848 }
1849 out:
1850 module_put(THIS_MODULE);
1851
1852 return rc;
1853 }
1854
1855 static int mdc_get_info_rpc(struct obd_export *exp,
1856 u32 keylen, void *key,
1857 int vallen, void *val)
1858 {
1859 struct obd_import *imp = class_exp2cliimp(exp);
1860 struct ptlrpc_request *req;
1861 char *tmp;
1862 int rc = -EINVAL;
1863
1864 req = ptlrpc_request_alloc(imp, &RQF_MDS_GET_INFO);
1865 if (!req)
1866 return -ENOMEM;
1867
1868 req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_KEY,
1869 RCL_CLIENT, keylen);
1870 req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_VALLEN,
1871 RCL_CLIENT, sizeof(__u32));
1872
1873 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GET_INFO);
1874 if (rc) {
1875 ptlrpc_request_free(req);
1876 return rc;
1877 }
1878
1879 tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_KEY);
1880 memcpy(tmp, key, keylen);
1881 tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_VALLEN);
1882 memcpy(tmp, &vallen, sizeof(__u32));
1883
1884 req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_VAL,
1885 RCL_SERVER, vallen);
1886 ptlrpc_request_set_replen(req);
1887
1888 rc = ptlrpc_queue_wait(req);
1889 /* -EREMOTE means the get_info result is partial, and it needs to
1890 * continue on another MDT, see fid2path part in lmv_iocontrol
1891 */
1892 if (rc == 0 || rc == -EREMOTE) {
1893 tmp = req_capsule_server_get(&req->rq_pill, &RMF_GETINFO_VAL);
1894 memcpy(val, tmp, vallen);
1895 if (ptlrpc_rep_need_swab(req)) {
1896 if (KEY_IS(KEY_FID2PATH))
1897 lustre_swab_fid2path(val);
1898 }
1899 }
1900 ptlrpc_req_finished(req);
1901
1902 return rc;
1903 }
1904
1905 static void lustre_swab_hai(struct hsm_action_item *h)
1906 {
1907 __swab32s(&h->hai_len);
1908 __swab32s(&h->hai_action);
1909 lustre_swab_lu_fid(&h->hai_fid);
1910 lustre_swab_lu_fid(&h->hai_dfid);
1911 __swab64s(&h->hai_cookie);
1912 __swab64s(&h->hai_extent.offset);
1913 __swab64s(&h->hai_extent.length);
1914 __swab64s(&h->hai_gid);
1915 }
1916
1917 static void lustre_swab_hal(struct hsm_action_list *h)
1918 {
1919 struct hsm_action_item *hai;
1920 int i;
1921
1922 __swab32s(&h->hal_version);
1923 __swab32s(&h->hal_count);
1924 __swab32s(&h->hal_archive_id);
1925 __swab64s(&h->hal_flags);
1926 hai = hai_first(h);
1927 for (i = 0; i < h->hal_count; i++, hai = hai_next(hai))
1928 lustre_swab_hai(hai);
1929 }
1930
1931 static void lustre_swab_kuch(struct kuc_hdr *l)
1932 {
1933 __swab16s(&l->kuc_magic);
1934 /* __u8 l->kuc_transport */
1935 __swab16s(&l->kuc_msgtype);
1936 __swab16s(&l->kuc_msglen);
1937 }
1938
1939 static int mdc_ioc_hsm_ct_start(struct obd_export *exp,
1940 struct lustre_kernelcomm *lk)
1941 {
1942 struct obd_import *imp = class_exp2cliimp(exp);
1943 __u32 archive = lk->lk_data;
1944 int rc = 0;
1945
1946 if (lk->lk_group != KUC_GRP_HSM) {
1947 CERROR("Bad copytool group %d\n", lk->lk_group);
1948 return -EINVAL;
1949 }
1950
1951 CDEBUG(D_HSM, "CT start r%d w%d u%d g%d f%#x\n", lk->lk_rfd, lk->lk_wfd,
1952 lk->lk_uid, lk->lk_group, lk->lk_flags);
1953
1954 if (lk->lk_flags & LK_FLG_STOP) {
1955 /* Unregister with the coordinator */
1956 rc = mdc_ioc_hsm_ct_unregister(imp);
1957 } else {
1958 rc = mdc_ioc_hsm_ct_register(imp, archive);
1959 }
1960
1961 return rc;
1962 }
1963
1964 /**
1965 * Send a message to any listening copytools
1966 * @param val KUC message (kuc_hdr + hsm_action_list)
1967 * @param len total length of message
1968 */
1969 static int mdc_hsm_copytool_send(int len, void *val)
1970 {
1971 struct kuc_hdr *lh = (struct kuc_hdr *)val;
1972 struct hsm_action_list *hal = (struct hsm_action_list *)(lh + 1);
1973
1974 if (len < sizeof(*lh) + sizeof(*hal)) {
1975 CERROR("Short HSM message %d < %d\n", len,
1976 (int)(sizeof(*lh) + sizeof(*hal)));
1977 return -EPROTO;
1978 }
1979 if (lh->kuc_magic == __swab16(KUC_MAGIC)) {
1980 lustre_swab_kuch(lh);
1981 lustre_swab_hal(hal);
1982 } else if (lh->kuc_magic != KUC_MAGIC) {
1983 CERROR("Bad magic %x!=%x\n", lh->kuc_magic, KUC_MAGIC);
1984 return -EPROTO;
1985 }
1986
1987 CDEBUG(D_HSM,
1988 "Received message mg=%x t=%d m=%d l=%d actions=%d on %s\n",
1989 lh->kuc_magic, lh->kuc_transport, lh->kuc_msgtype,
1990 lh->kuc_msglen, hal->hal_count, hal->hal_fsname);
1991
1992 /* Broadcast to HSM listeners */
1993 return libcfs_kkuc_group_put(KUC_GRP_HSM, lh);
1994 }
1995
1996 /**
1997 * callback function passed to kuc for re-registering each HSM copytool
1998 * running on MDC, after MDT shutdown/recovery.
1999 * @param data copytool registration data
2000 * @param cb_arg callback argument (obd_import)
2001 */
2002 static int mdc_hsm_ct_reregister(void *data, void *cb_arg)
2003 {
2004 struct kkuc_ct_data *kcd = data;
2005 struct obd_import *imp = (struct obd_import *)cb_arg;
2006 int rc;
2007
2008 if (!kcd || kcd->kcd_magic != KKUC_CT_DATA_MAGIC)
2009 return -EPROTO;
2010
2011 if (!obd_uuid_equals(&kcd->kcd_uuid, &imp->imp_obd->obd_uuid))
2012 return 0;
2013
2014 CDEBUG(D_HA, "%s: recover copytool registration to MDT (archive=%#x)\n",
2015 imp->imp_obd->obd_name, kcd->kcd_archive);
2016 rc = mdc_ioc_hsm_ct_register(imp, kcd->kcd_archive);
2017
2018 /* ignore error if the copytool is already registered */
2019 return (rc == -EEXIST) ? 0 : rc;
2020 }
2021
2022 static int mdc_set_info_async(const struct lu_env *env,
2023 struct obd_export *exp,
2024 u32 keylen, void *key,
2025 u32 vallen, void *val,
2026 struct ptlrpc_request_set *set)
2027 {
2028 struct obd_import *imp = class_exp2cliimp(exp);
2029 int rc;
2030
2031 if (KEY_IS(KEY_READ_ONLY)) {
2032 if (vallen != sizeof(int))
2033 return -EINVAL;
2034
2035 spin_lock(&imp->imp_lock);
2036 if (*((int *)val)) {
2037 imp->imp_connect_flags_orig |= OBD_CONNECT_RDONLY;
2038 imp->imp_connect_data.ocd_connect_flags |=
2039 OBD_CONNECT_RDONLY;
2040 } else {
2041 imp->imp_connect_flags_orig &= ~OBD_CONNECT_RDONLY;
2042 imp->imp_connect_data.ocd_connect_flags &=
2043 ~OBD_CONNECT_RDONLY;
2044 }
2045 spin_unlock(&imp->imp_lock);
2046
2047 rc = do_set_info_async(imp, MDS_SET_INFO, LUSTRE_MDS_VERSION,
2048 keylen, key, vallen, val, set);
2049 return rc;
2050 }
2051 if (KEY_IS(KEY_SPTLRPC_CONF)) {
2052 sptlrpc_conf_client_adapt(exp->exp_obd);
2053 return 0;
2054 }
2055 if (KEY_IS(KEY_FLUSH_CTX)) {
2056 sptlrpc_import_flush_my_ctx(imp);
2057 return 0;
2058 }
2059 if (KEY_IS(KEY_CHANGELOG_CLEAR)) {
2060 rc = do_set_info_async(imp, MDS_SET_INFO, LUSTRE_MDS_VERSION,
2061 keylen, key, vallen, val, set);
2062 return rc;
2063 }
2064 if (KEY_IS(KEY_HSM_COPYTOOL_SEND)) {
2065 rc = mdc_hsm_copytool_send(vallen, val);
2066 return rc;
2067 }
2068
2069 CERROR("Unknown key %s\n", (char *)key);
2070 return -EINVAL;
2071 }
2072
2073 static int mdc_get_info(const struct lu_env *env, struct obd_export *exp,
2074 __u32 keylen, void *key, __u32 *vallen, void *val,
2075 struct lov_stripe_md *lsm)
2076 {
2077 int rc = -EINVAL;
2078
2079 if (KEY_IS(KEY_MAX_EASIZE)) {
2080 int mdsize, *max_easize;
2081
2082 if (*vallen != sizeof(int))
2083 return -EINVAL;
2084 mdsize = *(int *)val;
2085 if (mdsize > exp->exp_obd->u.cli.cl_max_mds_easize)
2086 exp->exp_obd->u.cli.cl_max_mds_easize = mdsize;
2087 max_easize = val;
2088 *max_easize = exp->exp_obd->u.cli.cl_max_mds_easize;
2089 return 0;
2090 } else if (KEY_IS(KEY_DEFAULT_EASIZE)) {
2091 int *default_easize;
2092
2093 if (*vallen != sizeof(int))
2094 return -EINVAL;
2095 default_easize = val;
2096 *default_easize = exp->exp_obd->u.cli.cl_default_mds_easize;
2097 return 0;
2098 } else if (KEY_IS(KEY_CONN_DATA)) {
2099 struct obd_import *imp = class_exp2cliimp(exp);
2100 struct obd_connect_data *data = val;
2101
2102 if (*vallen != sizeof(*data))
2103 return -EINVAL;
2104
2105 *data = imp->imp_connect_data;
2106 return 0;
2107 } else if (KEY_IS(KEY_TGT_COUNT)) {
2108 *((int *)val) = 1;
2109 return 0;
2110 }
2111
2112 rc = mdc_get_info_rpc(exp, keylen, key, *vallen, val);
2113
2114 return rc;
2115 }
2116
2117 static int mdc_sync(struct obd_export *exp, const struct lu_fid *fid,
2118 struct ptlrpc_request **request)
2119 {
2120 struct ptlrpc_request *req;
2121 int rc;
2122
2123 *request = NULL;
2124 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_SYNC);
2125 if (!req)
2126 return -ENOMEM;
2127
2128 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SYNC);
2129 if (rc) {
2130 ptlrpc_request_free(req);
2131 return rc;
2132 }
2133
2134 mdc_pack_body(req, fid, 0, 0, -1, 0);
2135
2136 ptlrpc_request_set_replen(req);
2137
2138 rc = ptlrpc_queue_wait(req);
2139 if (rc)
2140 ptlrpc_req_finished(req);
2141 else
2142 *request = req;
2143 return rc;
2144 }
2145
2146 static int mdc_import_event(struct obd_device *obd, struct obd_import *imp,
2147 enum obd_import_event event)
2148 {
2149 int rc = 0;
2150
2151 LASSERT(imp->imp_obd == obd);
2152
2153 switch (event) {
2154 case IMP_EVENT_DISCON: {
2155 #if 0
2156 /* XXX Pass event up to OBDs stack. used only for FLD now */
2157 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DISCON, NULL);
2158 #endif
2159 break;
2160 }
2161 case IMP_EVENT_INACTIVE: {
2162 struct client_obd *cli = &obd->u.cli;
2163 /*
2164 * Flush current sequence to make client obtain new one
2165 * from server in case of disconnect/reconnect.
2166 */
2167 if (cli->cl_seq)
2168 seq_client_flush(cli->cl_seq);
2169
2170 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
2171 break;
2172 }
2173 case IMP_EVENT_INVALIDATE: {
2174 struct ldlm_namespace *ns = obd->obd_namespace;
2175
2176 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
2177
2178 break;
2179 }
2180 case IMP_EVENT_ACTIVE:
2181 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
2182 /* redo the kuc registration after reconnecting */
2183 if (rc == 0)
2184 /* re-register HSM agents */
2185 rc = libcfs_kkuc_group_foreach(KUC_GRP_HSM,
2186 mdc_hsm_ct_reregister,
2187 (void *)imp);
2188 break;
2189 case IMP_EVENT_OCD:
2190 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
2191 break;
2192 case IMP_EVENT_DEACTIVATE:
2193 case IMP_EVENT_ACTIVATE:
2194 break;
2195 default:
2196 CERROR("Unknown import event %x\n", event);
2197 LBUG();
2198 }
2199 return rc;
2200 }
2201
2202 int mdc_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
2203 struct md_op_data *op_data)
2204 {
2205 struct client_obd *cli = &exp->exp_obd->u.cli;
2206 struct lu_client_seq *seq = cli->cl_seq;
2207
2208 return seq_client_alloc_fid(NULL, seq, fid);
2209 }
2210
2211 static struct obd_uuid *mdc_get_uuid(struct obd_export *exp)
2212 {
2213 struct client_obd *cli = &exp->exp_obd->u.cli;
2214
2215 return &cli->cl_target_uuid;
2216 }
2217
2218 /**
2219 * Determine whether the lock can be canceled before replaying it during
2220 * recovery, non zero value will be return if the lock can be canceled,
2221 * or zero returned for not
2222 */
2223 static int mdc_cancel_weight(struct ldlm_lock *lock)
2224 {
2225 if (lock->l_resource->lr_type != LDLM_IBITS)
2226 return 0;
2227
2228 /* FIXME: if we ever get into a situation where there are too many
2229 * opened files with open locks on a single node, then we really
2230 * should replay these open locks to reget it
2231 */
2232 if (lock->l_policy_data.l_inodebits.bits & MDS_INODELOCK_OPEN)
2233 return 0;
2234
2235 return 1;
2236 }
2237
2238 static int mdc_resource_inode_free(struct ldlm_resource *res)
2239 {
2240 if (res->lr_lvb_inode)
2241 res->lr_lvb_inode = NULL;
2242
2243 return 0;
2244 }
2245
2246 static struct ldlm_valblock_ops inode_lvbo = {
2247 .lvbo_free = mdc_resource_inode_free,
2248 };
2249
2250 static int mdc_llog_init(struct obd_device *obd)
2251 {
2252 struct obd_llog_group *olg = &obd->obd_olg;
2253 struct llog_ctxt *ctxt;
2254 int rc;
2255
2256 rc = llog_setup(NULL, obd, olg, LLOG_CHANGELOG_REPL_CTXT, obd,
2257 &llog_client_ops);
2258 if (rc)
2259 return rc;
2260
2261 ctxt = llog_group_get_ctxt(olg, LLOG_CHANGELOG_REPL_CTXT);
2262 llog_initiator_connect(ctxt);
2263 llog_ctxt_put(ctxt);
2264
2265 return 0;
2266 }
2267
2268 static void mdc_llog_finish(struct obd_device *obd)
2269 {
2270 struct llog_ctxt *ctxt;
2271
2272 ctxt = llog_get_context(obd, LLOG_CHANGELOG_REPL_CTXT);
2273 if (ctxt)
2274 llog_cleanup(NULL, ctxt);
2275 }
2276
2277 static int mdc_setup(struct obd_device *obd, struct lustre_cfg *cfg)
2278 {
2279 struct client_obd *cli = &obd->u.cli;
2280 struct lprocfs_static_vars lvars = { NULL };
2281 int rc;
2282
2283 cli->cl_rpc_lock = kzalloc(sizeof(*cli->cl_rpc_lock), GFP_NOFS);
2284 if (!cli->cl_rpc_lock)
2285 return -ENOMEM;
2286 mdc_init_rpc_lock(cli->cl_rpc_lock);
2287
2288 rc = ptlrpcd_addref();
2289 if (rc < 0)
2290 goto err_rpc_lock;
2291
2292 cli->cl_close_lock = kzalloc(sizeof(*cli->cl_close_lock), GFP_NOFS);
2293 if (!cli->cl_close_lock) {
2294 rc = -ENOMEM;
2295 goto err_ptlrpcd_decref;
2296 }
2297 mdc_init_rpc_lock(cli->cl_close_lock);
2298
2299 rc = client_obd_setup(obd, cfg);
2300 if (rc)
2301 goto err_close_lock;
2302 lprocfs_mdc_init_vars(&lvars);
2303 lprocfs_obd_setup(obd, lvars.obd_vars, lvars.sysfs_vars);
2304 sptlrpc_lprocfs_cliobd_attach(obd);
2305 ptlrpc_lprocfs_register_obd(obd);
2306
2307 ns_register_cancel(obd->obd_namespace, mdc_cancel_weight);
2308
2309 obd->obd_namespace->ns_lvbo = &inode_lvbo;
2310
2311 rc = mdc_llog_init(obd);
2312 if (rc) {
2313 mdc_cleanup(obd);
2314 CERROR("failed to setup llogging subsystems\n");
2315 }
2316
2317 return rc;
2318
2319 err_close_lock:
2320 kfree(cli->cl_close_lock);
2321 err_ptlrpcd_decref:
2322 ptlrpcd_decref();
2323 err_rpc_lock:
2324 kfree(cli->cl_rpc_lock);
2325 return rc;
2326 }
2327
2328 /* Initialize the default and maximum LOV EA and cookie sizes. This allows
2329 * us to make MDS RPCs with large enough reply buffers to hold a default
2330 * sized EA and cookie without having to calculate this (via a call into the
2331 * LOV + OSCs) each time we make an RPC. The maximum size is also tracked
2332 * but not used to avoid wastefully vmalloc()'ing large reply buffers when
2333 * a large number of stripes is possible. If a larger reply buffer is
2334 * required it will be reallocated in the ptlrpc layer due to overflow.
2335 */
2336 static int mdc_init_ea_size(struct obd_export *exp, int easize,
2337 int def_easize, int cookiesize, int def_cookiesize)
2338 {
2339 struct obd_device *obd = exp->exp_obd;
2340 struct client_obd *cli = &obd->u.cli;
2341
2342 if (cli->cl_max_mds_easize < easize)
2343 cli->cl_max_mds_easize = easize;
2344
2345 if (cli->cl_default_mds_easize < def_easize)
2346 cli->cl_default_mds_easize = def_easize;
2347
2348 if (cli->cl_max_mds_cookiesize < cookiesize)
2349 cli->cl_max_mds_cookiesize = cookiesize;
2350
2351 if (cli->cl_default_mds_cookiesize < def_cookiesize)
2352 cli->cl_default_mds_cookiesize = def_cookiesize;
2353
2354 return 0;
2355 }
2356
2357 static int mdc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
2358 {
2359 switch (stage) {
2360 case OBD_CLEANUP_EARLY:
2361 break;
2362 case OBD_CLEANUP_EXPORTS:
2363 /* Failsafe, ok if racy */
2364 if (obd->obd_type->typ_refcnt <= 1)
2365 libcfs_kkuc_group_rem(0, KUC_GRP_HSM);
2366
2367 obd_cleanup_client_import(obd);
2368 ptlrpc_lprocfs_unregister_obd(obd);
2369 lprocfs_obd_cleanup(obd);
2370
2371 mdc_llog_finish(obd);
2372 break;
2373 }
2374 return 0;
2375 }
2376
2377 static int mdc_cleanup(struct obd_device *obd)
2378 {
2379 struct client_obd *cli = &obd->u.cli;
2380
2381 kfree(cli->cl_rpc_lock);
2382 kfree(cli->cl_close_lock);
2383
2384 ptlrpcd_decref();
2385
2386 return client_obd_cleanup(obd);
2387 }
2388
2389 static int mdc_process_config(struct obd_device *obd, u32 len, void *buf)
2390 {
2391 struct lustre_cfg *lcfg = buf;
2392 struct lprocfs_static_vars lvars = { NULL };
2393 int rc = 0;
2394
2395 lprocfs_mdc_init_vars(&lvars);
2396 switch (lcfg->lcfg_command) {
2397 default:
2398 rc = class_process_proc_param(PARAM_MDC, lvars.obd_vars,
2399 lcfg, obd);
2400 if (rc > 0)
2401 rc = 0;
2402 break;
2403 }
2404 return rc;
2405 }
2406
2407 static struct obd_ops mdc_obd_ops = {
2408 .owner = THIS_MODULE,
2409 .setup = mdc_setup,
2410 .precleanup = mdc_precleanup,
2411 .cleanup = mdc_cleanup,
2412 .add_conn = client_import_add_conn,
2413 .del_conn = client_import_del_conn,
2414 .connect = client_connect_import,
2415 .disconnect = client_disconnect_export,
2416 .iocontrol = mdc_iocontrol,
2417 .set_info_async = mdc_set_info_async,
2418 .statfs = mdc_statfs,
2419 .fid_init = client_fid_init,
2420 .fid_fini = client_fid_fini,
2421 .fid_alloc = mdc_fid_alloc,
2422 .import_event = mdc_import_event,
2423 .get_info = mdc_get_info,
2424 .process_config = mdc_process_config,
2425 .get_uuid = mdc_get_uuid,
2426 .quotactl = mdc_quotactl,
2427 .quotacheck = mdc_quotacheck
2428 };
2429
2430 static struct md_ops mdc_md_ops = {
2431 .getstatus = mdc_getstatus,
2432 .null_inode = mdc_null_inode,
2433 .find_cbdata = mdc_find_cbdata,
2434 .close = mdc_close,
2435 .create = mdc_create,
2436 .done_writing = mdc_done_writing,
2437 .enqueue = mdc_enqueue,
2438 .getattr = mdc_getattr,
2439 .getattr_name = mdc_getattr_name,
2440 .intent_lock = mdc_intent_lock,
2441 .link = mdc_link,
2442 .is_subdir = mdc_is_subdir,
2443 .rename = mdc_rename,
2444 .setattr = mdc_setattr,
2445 .setxattr = mdc_setxattr,
2446 .getxattr = mdc_getxattr,
2447 .sync = mdc_sync,
2448 .readpage = mdc_readpage,
2449 .unlink = mdc_unlink,
2450 .cancel_unused = mdc_cancel_unused,
2451 .init_ea_size = mdc_init_ea_size,
2452 .set_lock_data = mdc_set_lock_data,
2453 .lock_match = mdc_lock_match,
2454 .get_lustre_md = mdc_get_lustre_md,
2455 .free_lustre_md = mdc_free_lustre_md,
2456 .set_open_replay_data = mdc_set_open_replay_data,
2457 .clear_open_replay_data = mdc_clear_open_replay_data,
2458 .intent_getattr_async = mdc_intent_getattr_async,
2459 .revalidate_lock = mdc_revalidate_lock
2460 };
2461
2462 static int __init mdc_init(void)
2463 {
2464 struct lprocfs_static_vars lvars = { NULL };
2465
2466 lprocfs_mdc_init_vars(&lvars);
2467
2468 return class_register_type(&mdc_obd_ops, &mdc_md_ops,
2469 LUSTRE_MDC_NAME, NULL);
2470 }
2471
2472 static void /*__exit*/ mdc_exit(void)
2473 {
2474 class_unregister_type(LUSTRE_MDC_NAME);
2475 }
2476
2477 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
2478 MODULE_DESCRIPTION("Lustre Metadata Client");
2479 MODULE_VERSION(LUSTRE_VERSION_STRING);
2480 MODULE_LICENSE("GPL");
2481
2482 module_init(mdc_init);
2483 module_exit(mdc_exit);
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