4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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.
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).
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
23 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 #define DEBUG_SUBSYSTEM S_MDC
35 #include <linux/init.h>
36 #include <linux/kthread.h>
37 #include <linux/module.h>
38 #include <linux/pagemap.h>
39 #include <linux/user_namespace.h>
40 #include <linux/utsname.h>
41 #ifdef HAVE_UIDGID_HEADER
42 # include <linux/uidgid.h>
45 #include <lustre_errno.h>
47 #include <cl_object.h>
48 #include <llog_swab.h>
49 #include <lprocfs_status.h>
50 #include <lustre_acl.h>
51 #include <lustre_fid.h>
52 #include <uapi/linux/lustre/lustre_ioctl.h>
53 #include <lustre_kernelcomm.h>
54 #include <lustre_lmv.h>
55 #include <lustre_log.h>
56 #include <uapi/linux/lustre/lustre_param.h>
57 #include <lustre_swab.h>
58 #include <obd_class.h>
59 #include <lustre_osc.h>
61 #include "mdc_internal.h"
63 #define REQUEST_MINOR 244
65 static int mdc_cleanup(struct obd_device *obd);
67 static inline int mdc_queue_wait(struct ptlrpc_request *req)
69 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
72 /* obd_get_request_slot() ensures that this client has no more
73 * than cl_max_rpcs_in_flight RPCs simultaneously inf light
75 rc = obd_get_request_slot(cli);
79 rc = ptlrpc_queue_wait(req);
80 obd_put_request_slot(cli);
86 * Send MDS_GET_ROOT RPC to fetch root FID.
88 * If \a fileset is not NULL it should contain a subdirectory off
89 * the ROOT/ directory to be mounted on the client. Return the FID
90 * of the subdirectory to the client to mount onto its mountpoint.
92 * \param[in] imp MDC import
93 * \param[in] fileset fileset name, which could be NULL
94 * \param[out] rootfid root FID of this mountpoint
95 * \param[out] pc root capa will be unpacked and saved in this pointer
97 * \retval 0 on success, negative errno on failure
99 static int mdc_get_root(struct obd_export *exp, const char *fileset,
100 struct lu_fid *rootfid)
102 struct ptlrpc_request *req;
103 struct mdt_body *body;
108 if (fileset && !(exp_connect_flags(exp) & OBD_CONNECT_SUBTREE))
111 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
117 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
118 strlen(fileset) + 1);
119 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GET_ROOT);
121 ptlrpc_request_free(req);
124 mdc_pack_body(req, NULL, 0, 0, -1, 0);
125 if (fileset != NULL) {
126 char *name = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
128 memcpy(name, fileset, strlen(fileset));
130 lustre_msg_add_flags(req->rq_reqmsg, LUSTRE_IMP_FULL);
131 req->rq_send_state = LUSTRE_IMP_FULL;
133 ptlrpc_request_set_replen(req);
135 rc = ptlrpc_queue_wait(req);
139 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
141 GOTO(out, rc = -EPROTO);
143 *rootfid = body->mbo_fid1;
144 CDEBUG(D_NET, "root fid="DFID", last_committed=%llu\n",
145 PFID(rootfid), lustre_msg_get_last_committed(req->rq_repmsg));
148 ptlrpc_req_finished(req);
154 * This function now is known to always saying that it will receive 4 buffers
155 * from server. Even for cases when acl_size and md_size is zero, RPC header
156 * will contain 4 fields and RPC itself will contain zero size fields. This is
157 * because mdt_getattr*() _always_ returns 4 fields, but if acl is not needed
158 * and thus zero, it shrinks it, making zero size. The same story about
159 * md_size. And this is course of problem when client waits for smaller number
160 * of fields. This issue will be fixed later when client gets aware of RPC
163 static int mdc_getattr_common(struct obd_export *exp,
164 struct ptlrpc_request *req)
166 struct req_capsule *pill = &req->rq_pill;
167 struct mdt_body *body;
172 /* Request message already built. */
173 rc = ptlrpc_queue_wait(req);
177 /* sanity check for the reply */
178 body = req_capsule_server_get(pill, &RMF_MDT_BODY);
182 CDEBUG(D_NET, "mode: %o\n", body->mbo_mode);
184 mdc_update_max_ea_from_body(exp, body);
185 if (body->mbo_eadatasize != 0) {
186 eadata = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
187 body->mbo_eadatasize);
195 static int mdc_getattr(struct obd_export *exp, struct md_op_data *op_data,
196 struct ptlrpc_request **request)
198 struct ptlrpc_request *req;
202 /* Single MDS without an LMV case */
203 if (op_data->op_flags & MF_GET_MDT_IDX) {
208 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
212 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
214 ptlrpc_request_free(req);
218 mdc_pack_body(req, &op_data->op_fid1, op_data->op_valid,
219 op_data->op_mode, -1, 0);
221 req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
222 req->rq_import->imp_connect_data.ocd_max_easize);
223 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
225 ptlrpc_request_set_replen(req);
227 rc = mdc_getattr_common(exp, req);
229 ptlrpc_req_finished(req);
235 static int mdc_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
236 struct ptlrpc_request **request)
238 struct ptlrpc_request *req;
243 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
244 &RQF_MDS_GETATTR_NAME);
248 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
249 op_data->op_namelen + 1);
251 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR_NAME);
253 ptlrpc_request_free(req);
257 mdc_pack_body(req, &op_data->op_fid1, op_data->op_valid,
258 op_data->op_mode, op_data->op_suppgids[0], 0);
260 if (op_data->op_name) {
261 char *name = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
262 LASSERT(strnlen(op_data->op_name, op_data->op_namelen) ==
263 op_data->op_namelen);
264 memcpy(name, op_data->op_name, op_data->op_namelen);
267 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
269 req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
270 req->rq_import->imp_connect_data.ocd_max_easize);
271 ptlrpc_request_set_replen(req);
273 rc = mdc_getattr_common(exp, req);
275 ptlrpc_req_finished(req);
281 static int mdc_xattr_common(struct obd_export *exp,const struct req_format *fmt,
282 const struct lu_fid *fid, int opcode, u64 valid,
283 const char *xattr_name, const char *input,
284 int input_size, int output_size, int flags,
285 __u32 suppgid, struct ptlrpc_request **request)
287 struct ptlrpc_request *req;
288 int xattr_namelen = 0;
294 req = ptlrpc_request_alloc(class_exp2cliimp(exp), fmt);
299 xattr_namelen = strlen(xattr_name) + 1;
300 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
305 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
309 /* Flush local XATTR locks to get rid of a possible cancel RPC */
310 if (opcode == MDS_REINT && fid_is_sane(fid) &&
311 exp->exp_connect_data.ocd_ibits_known & MDS_INODELOCK_XATTR) {
312 struct list_head cancels = LIST_HEAD_INIT(cancels);
315 /* Without that packing would fail */
317 req_capsule_set_size(&req->rq_pill, &RMF_EADATA,
320 count = mdc_resource_get_unused(exp, fid,
322 MDS_INODELOCK_XATTR);
324 rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
326 ptlrpc_request_free(req);
330 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, opcode);
332 ptlrpc_request_free(req);
337 if (opcode == MDS_REINT) {
338 struct mdt_rec_setxattr *rec;
340 CLASSERT(sizeof(struct mdt_rec_setxattr) ==
341 sizeof(struct mdt_rec_reint));
342 rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
343 rec->sx_opcode = REINT_SETXATTR;
344 rec->sx_fsuid = from_kuid(&init_user_ns, current_fsuid());
345 rec->sx_fsgid = from_kgid(&init_user_ns, current_fsgid());
346 rec->sx_cap = cfs_curproc_cap_pack();
347 rec->sx_suppgid1 = suppgid;
348 rec->sx_suppgid2 = -1;
350 rec->sx_valid = valid | OBD_MD_FLCTIME;
351 rec->sx_time = ktime_get_real_seconds();
352 rec->sx_size = output_size;
353 rec->sx_flags = flags;
355 mdc_pack_body(req, fid, valid, output_size, suppgid, flags);
359 tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
360 memcpy(tmp, xattr_name, xattr_namelen);
363 tmp = req_capsule_client_get(&req->rq_pill, &RMF_EADATA);
364 memcpy(tmp, input, input_size);
367 if (req_capsule_has_field(&req->rq_pill, &RMF_EADATA, RCL_SERVER))
368 req_capsule_set_size(&req->rq_pill, &RMF_EADATA,
369 RCL_SERVER, output_size);
370 ptlrpc_request_set_replen(req);
373 if (opcode == MDS_REINT)
374 mdc_get_mod_rpc_slot(req, NULL);
376 rc = ptlrpc_queue_wait(req);
378 if (opcode == MDS_REINT)
379 mdc_put_mod_rpc_slot(req, NULL);
382 ptlrpc_req_finished(req);
388 static int mdc_setxattr(struct obd_export *exp, const struct lu_fid *fid,
389 u64 valid, const char *xattr_name,
390 const char *input, int input_size, int output_size,
391 int flags, __u32 suppgid,
392 struct ptlrpc_request **request)
394 return mdc_xattr_common(exp, &RQF_MDS_REINT_SETXATTR,
395 fid, MDS_REINT, valid, xattr_name,
396 input, input_size, output_size, flags,
400 static int mdc_getxattr(struct obd_export *exp, const struct lu_fid *fid,
401 u64 valid, const char *xattr_name,
402 const char *input, int input_size, int output_size,
403 int flags, struct ptlrpc_request **request)
405 return mdc_xattr_common(exp, &RQF_MDS_GETXATTR,
406 fid, MDS_GETXATTR, valid, xattr_name,
407 input, input_size, output_size, flags,
411 #ifdef CONFIG_FS_POSIX_ACL
412 static int mdc_unpack_acl(struct ptlrpc_request *req, struct lustre_md *md)
414 struct req_capsule *pill = &req->rq_pill;
415 struct mdt_body *body = md->body;
416 struct posix_acl *acl;
421 if (!body->mbo_aclsize)
424 buf = req_capsule_server_sized_get(pill, &RMF_ACL, body->mbo_aclsize);
429 acl = posix_acl_from_xattr(&init_user_ns, buf, body->mbo_aclsize);
434 CERROR("convert xattr to acl: %d\n", rc);
438 rc = posix_acl_valid(&init_user_ns, acl);
440 CERROR("validate acl: %d\n", rc);
441 posix_acl_release(acl);
449 #define mdc_unpack_acl(req, md) 0
452 int mdc_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
453 struct obd_export *dt_exp, struct obd_export *md_exp,
454 struct lustre_md *md)
456 struct req_capsule *pill = &req->rq_pill;
461 memset(md, 0, sizeof(*md));
463 md->body = req_capsule_server_get(pill, &RMF_MDT_BODY);
464 LASSERT(md->body != NULL);
466 if (md->body->mbo_valid & OBD_MD_FLEASIZE) {
467 if (!S_ISREG(md->body->mbo_mode)) {
468 CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, should be a "
469 "regular file, but is not\n");
470 GOTO(out, rc = -EPROTO);
473 if (md->body->mbo_eadatasize == 0) {
474 CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, "
475 "but eadatasize 0\n");
476 GOTO(out, rc = -EPROTO);
479 md->layout.lb_len = md->body->mbo_eadatasize;
480 md->layout.lb_buf = req_capsule_server_sized_get(pill,
483 if (md->layout.lb_buf == NULL)
484 GOTO(out, rc = -EPROTO);
485 } else if (md->body->mbo_valid & OBD_MD_FLDIREA) {
486 const union lmv_mds_md *lmv;
489 if (!S_ISDIR(md->body->mbo_mode)) {
490 CDEBUG(D_INFO, "OBD_MD_FLDIREA set, should be a "
491 "directory, but is not\n");
492 GOTO(out, rc = -EPROTO);
495 lmv_size = md->body->mbo_eadatasize;
497 CDEBUG(D_INFO, "OBD_MD_FLDIREA is set, "
498 "but eadatasize 0\n");
502 if (md->body->mbo_valid & OBD_MD_MEA) {
503 lmv = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
506 GOTO(out, rc = -EPROTO);
508 rc = md_unpackmd(md_exp, &md->lmv, lmv, lmv_size);
512 if (rc < (typeof(rc))sizeof(*md->lmv)) {
513 CDEBUG(D_INFO, "size too small: "
514 "rc < sizeof(*md->lmv) (%d < %d)\n",
515 rc, (int)sizeof(*md->lmv));
516 GOTO(out, rc = -EPROTO);
522 if (md->body->mbo_valid & OBD_MD_FLACL) {
523 /* for ACL, it's possible that FLACL is set but aclsize is zero.
524 * only when aclsize != 0 there's an actual segment for ACL
527 if (md->body->mbo_aclsize) {
528 rc = mdc_unpack_acl(req, md);
531 #ifdef CONFIG_FS_POSIX_ACL
533 md->posix_acl = NULL;
541 #ifdef CONFIG_FS_POSIX_ACL
542 posix_acl_release(md->posix_acl);
548 int mdc_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
554 void mdc_replay_open(struct ptlrpc_request *req)
556 struct md_open_data *mod = req->rq_cb_data;
557 struct ptlrpc_request *close_req;
558 struct obd_client_handle *och;
559 struct lustre_handle old;
560 struct mdt_body *body;
564 DEBUG_REQ(D_ERROR, req,
565 "Can't properly replay without open data.");
570 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
571 LASSERT(body != NULL);
573 spin_lock(&req->rq_lock);
575 if (och && och->och_fh.cookie)
576 req->rq_early_free_repbuf = 1;
578 req->rq_early_free_repbuf = 0;
579 spin_unlock(&req->rq_lock);
581 if (req->rq_early_free_repbuf) {
582 struct lustre_handle *file_fh;
584 LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
586 file_fh = &och->och_fh;
587 CDEBUG(D_HA, "updating handle from %#llx to %#llx\n",
588 file_fh->cookie, body->mbo_handle.cookie);
590 *file_fh = body->mbo_handle;
593 close_req = mod->mod_close_req;
595 __u32 opc = lustre_msg_get_opc(close_req->rq_reqmsg);
596 struct mdt_ioepoch *epoch;
598 LASSERT(opc == MDS_CLOSE);
599 epoch = req_capsule_client_get(&close_req->rq_pill,
603 if (req->rq_early_free_repbuf)
604 LASSERT(!memcmp(&old, &epoch->mio_handle, sizeof(old)));
606 DEBUG_REQ(D_HA, close_req, "updating close body with new fh");
607 epoch->mio_handle = body->mbo_handle;
612 void mdc_commit_open(struct ptlrpc_request *req)
614 struct md_open_data *mod = req->rq_cb_data;
619 * No need to touch md_open_data::mod_och, it holds a reference on
620 * \var mod and will zero references to each other, \var mod will be
621 * freed after that when md_open_data::mod_och will put the reference.
625 * Do not let open request to disappear as it still may be needed
626 * for close rpc to happen (it may happen on evict only, otherwise
627 * ptlrpc_request::rq_replay does not let mdc_commit_open() to be
628 * called), just mark this rpc as committed to distinguish these 2
629 * cases, see mdc_close() for details. The open request reference will
630 * be put along with freeing \var mod.
632 ptlrpc_request_addref(req);
633 spin_lock(&req->rq_lock);
634 req->rq_committed = 1;
635 spin_unlock(&req->rq_lock);
636 req->rq_cb_data = NULL;
640 int mdc_set_open_replay_data(struct obd_export *exp,
641 struct obd_client_handle *och,
642 struct lookup_intent *it)
644 struct md_open_data *mod;
645 struct mdt_rec_create *rec;
646 struct mdt_body *body;
647 struct ptlrpc_request *open_req = it->it_request;
648 struct obd_import *imp = open_req->rq_import;
651 if (!open_req->rq_replay)
654 rec = req_capsule_client_get(&open_req->rq_pill, &RMF_REC_REINT);
655 body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
656 LASSERT(rec != NULL);
657 /* Incoming message in my byte order (it's been swabbed). */
658 /* Outgoing messages always in my byte order. */
659 LASSERT(body != NULL);
661 /* Only if the import is replayable, we set replay_open data */
662 if (och && imp->imp_replayable) {
663 mod = obd_mod_alloc();
665 DEBUG_REQ(D_ERROR, open_req,
666 "Can't allocate md_open_data");
671 * Take a reference on \var mod, to be freed on mdc_close().
672 * It protects \var mod from being freed on eviction (commit
673 * callback is called despite rq_replay flag).
674 * Another reference for \var och.
679 spin_lock(&open_req->rq_lock);
682 mod->mod_is_create = it_disposition(it, DISP_OPEN_CREATE) ||
683 it_disposition(it, DISP_OPEN_STRIPE);
684 mod->mod_open_req = open_req;
685 open_req->rq_cb_data = mod;
686 open_req->rq_commit_cb = mdc_commit_open;
687 open_req->rq_early_free_repbuf = 1;
688 spin_unlock(&open_req->rq_lock);
691 rec->cr_fid2 = body->mbo_fid1;
692 rec->cr_ioepoch = body->mbo_ioepoch;
693 rec->cr_old_handle.cookie = body->mbo_handle.cookie;
694 open_req->rq_replay_cb = mdc_replay_open;
695 if (!fid_is_sane(&body->mbo_fid1)) {
696 DEBUG_REQ(D_ERROR, open_req, "Saving replay request with "
701 DEBUG_REQ(D_RPCTRACE, open_req, "Set up open replay data");
705 static void mdc_free_open(struct md_open_data *mod)
709 if (mod->mod_is_create == 0 &&
710 imp_connect_disp_stripe(mod->mod_open_req->rq_import))
714 * No reason to asssert here if the open request has
715 * rq_replay == 1. It means that mdc_close failed, and
716 * close request wasn`t sent. It is not fatal to client.
717 * The worst thing is eviction if the client gets open lock
720 DEBUG_REQ(D_RPCTRACE, mod->mod_open_req, "free open request rq_replay"
721 "= %d\n", mod->mod_open_req->rq_replay);
723 ptlrpc_request_committed(mod->mod_open_req, committed);
724 if (mod->mod_close_req)
725 ptlrpc_request_committed(mod->mod_close_req, committed);
728 int mdc_clear_open_replay_data(struct obd_export *exp,
729 struct obd_client_handle *och)
731 struct md_open_data *mod = och->och_mod;
735 * It is possible to not have \var mod in a case of eviction between
736 * lookup and ll_file_open().
741 LASSERT(mod != LP_POISON);
742 LASSERT(mod->mod_open_req != NULL);
744 spin_lock(&mod->mod_open_req->rq_lock);
746 mod->mod_och->och_fh.cookie = 0;
747 mod->mod_open_req->rq_early_free_repbuf = 0;
748 spin_unlock(&mod->mod_open_req->rq_lock);
758 static int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
759 struct md_open_data *mod, struct ptlrpc_request **request)
761 struct obd_device *obd = class_exp2obd(exp);
762 struct ptlrpc_request *req;
763 struct req_format *req_fmt;
764 size_t u32_count = 0;
769 CDEBUG(D_INODE, "%s: "DFID" file closed with intent: %x\n",
770 exp->exp_obd->obd_name, PFID(&op_data->op_fid1),
773 if (op_data->op_bias & MDS_CLOSE_INTENT) {
774 req_fmt = &RQF_MDS_INTENT_CLOSE;
775 if (op_data->op_bias & MDS_HSM_RELEASE) {
776 /* allocate a FID for volatile file */
777 rc = mdc_fid_alloc(NULL, exp, &op_data->op_fid2,
780 CERROR("%s: "DFID" allocating FID: rc = %d\n",
781 obd->obd_name, PFID(&op_data->op_fid1),
783 /* save the errcode and proceed to close */
787 if (op_data->op_bias & MDS_CLOSE_RESYNC_DONE) {
788 size_t count = op_data->op_data_size / sizeof(__u32);
790 if (count > INLINE_RESYNC_ARRAY_SIZE)
794 req_fmt = &RQF_MDS_CLOSE;
798 if (OBD_FAIL_CHECK(OBD_FAIL_MDC_CLOSE))
801 req = ptlrpc_request_alloc(class_exp2cliimp(exp), req_fmt);
803 /* Ensure that this close's handle is fixed up during replay. */
804 if (likely(mod != NULL)) {
805 LASSERTF(mod->mod_open_req != NULL &&
806 mod->mod_open_req->rq_type != LI_POISON,
807 "POISONED open %p!\n", mod->mod_open_req);
809 mod->mod_close_req = req;
811 DEBUG_REQ(D_HA, mod->mod_open_req, "matched open");
812 /* We no longer want to preserve this open for replay even
813 * though the open was committed. b=3632, b=3633 */
814 spin_lock(&mod->mod_open_req->rq_lock);
815 mod->mod_open_req->rq_replay = 0;
816 spin_unlock(&mod->mod_open_req->rq_lock);
818 CDEBUG(D_HA, "couldn't find open req; expecting close error\n");
822 * TODO: repeat close after errors
824 CWARN("%s: close of FID "DFID" failed, file reference will be "
825 "dropped when this client unmounts or is evicted\n",
826 obd->obd_name, PFID(&op_data->op_fid1));
827 GOTO(out, rc = -ENOMEM);
831 req_capsule_set_size(&req->rq_pill, &RMF_U32, RCL_CLIENT,
832 u32_count * sizeof(__u32));
834 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_CLOSE);
836 ptlrpc_request_free(req);
841 /* To avoid a livelock (bug 7034), we need to send CLOSE RPCs to a
842 * portal whose threads are not taking any DLM locks and are therefore
843 * always progressing */
844 req->rq_request_portal = MDS_READPAGE_PORTAL;
845 ptlrpc_at_set_req_timeout(req);
848 mdc_close_pack(req, op_data);
850 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
851 obd->u.cli.cl_default_mds_easize);
853 ptlrpc_request_set_replen(req);
855 mdc_get_mod_rpc_slot(req, NULL);
856 rc = ptlrpc_queue_wait(req);
857 mdc_put_mod_rpc_slot(req, NULL);
859 if (req->rq_repmsg == NULL) {
860 CDEBUG(D_RPCTRACE, "request failed to send: %p, %d\n", req,
863 rc = req->rq_status ?: -EIO;
864 } else if (rc == 0 || rc == -EAGAIN) {
865 struct mdt_body *body;
867 rc = lustre_msg_get_status(req->rq_repmsg);
868 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
869 DEBUG_REQ(D_ERROR, req, "type == PTL_RPC_MSG_ERR, err "
874 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
877 } else if (rc == -ESTALE) {
879 * it can be allowed error after 3633 if open was committed and
880 * server failed before close was sent. Let's check if mod
881 * exists and return no error in that case
884 DEBUG_REQ(D_HA, req, "Reset ESTALE = %d", rc);
885 LASSERT(mod->mod_open_req != NULL);
886 if (mod->mod_open_req->rq_committed)
894 mod->mod_close_req = NULL;
895 /* Since now, mod is accessed through open_req only,
896 * thus close req does not keep a reference on mod anymore. */
901 RETURN(rc < 0 ? rc : saved_rc);
904 static int mdc_getpage(struct obd_export *exp, const struct lu_fid *fid,
905 u64 offset, struct page **pages, int npages,
906 struct ptlrpc_request **request)
908 struct ptlrpc_request *req;
909 struct ptlrpc_bulk_desc *desc;
911 wait_queue_head_t waitq;
913 struct l_wait_info lwi;
918 init_waitqueue_head(&waitq);
921 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_READPAGE);
925 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_READPAGE);
927 ptlrpc_request_free(req);
931 req->rq_request_portal = MDS_READPAGE_PORTAL;
932 ptlrpc_at_set_req_timeout(req);
934 desc = ptlrpc_prep_bulk_imp(req, npages, 1,
935 PTLRPC_BULK_PUT_SINK | PTLRPC_BULK_BUF_KIOV,
937 &ptlrpc_bulk_kiov_pin_ops);
939 ptlrpc_req_finished(req);
943 /* NB req now owns desc and will free it when it gets freed */
944 for (i = 0; i < npages; i++)
945 desc->bd_frag_ops->add_kiov_frag(desc, pages[i], 0,
948 mdc_readdir_pack(req, offset, PAGE_SIZE * npages, fid);
950 ptlrpc_request_set_replen(req);
951 rc = ptlrpc_queue_wait(req);
953 ptlrpc_req_finished(req);
954 if (rc != -ETIMEDOUT)
958 if (!client_should_resend(resends, &exp->exp_obd->u.cli)) {
959 CERROR("%s: too many resend retries: rc = %d\n",
960 exp->exp_obd->obd_name, -EIO);
963 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends), NULL, NULL,
965 l_wait_event(waitq, 0, &lwi);
970 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk,
971 req->rq_bulk->bd_nob_transferred);
973 ptlrpc_req_finished(req);
977 if (req->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK) {
978 CERROR("%s: unexpected bytes transferred: %d (%ld expected)\n",
979 exp->exp_obd->obd_name, req->rq_bulk->bd_nob_transferred,
981 ptlrpc_req_finished(req);
989 static void mdc_release_page(struct page *page, int remove)
993 if (likely(page->mapping != NULL))
994 truncate_complete_page(page->mapping, page);
1000 static struct page *mdc_page_locate(struct address_space *mapping, __u64 *hash,
1001 __u64 *start, __u64 *end, int hash64)
1004 * Complement of hash is used as an index so that
1005 * radix_tree_gang_lookup() can be used to find a page with starting
1006 * hash _smaller_ than one we are looking for.
1008 unsigned long offset = hash_x_index(*hash, hash64);
1012 spin_lock_irq(&mapping->tree_lock);
1013 found = radix_tree_gang_lookup(&mapping->page_tree,
1014 (void **)&page, offset, 1);
1015 if (found > 0 && !radix_tree_exceptional_entry(page)) {
1016 struct lu_dirpage *dp;
1019 spin_unlock_irq(&mapping->tree_lock);
1021 * In contrast to find_lock_page() we are sure that directory
1022 * page cannot be truncated (while DLM lock is held) and,
1023 * hence, can avoid restart.
1025 * In fact, page cannot be locked here at all, because
1026 * mdc_read_page_remote does synchronous io.
1028 wait_on_page_locked(page);
1029 if (PageUptodate(page)) {
1031 if (BITS_PER_LONG == 32 && hash64) {
1032 *start = le64_to_cpu(dp->ldp_hash_start) >> 32;
1033 *end = le64_to_cpu(dp->ldp_hash_end) >> 32;
1034 *hash = *hash >> 32;
1036 *start = le64_to_cpu(dp->ldp_hash_start);
1037 *end = le64_to_cpu(dp->ldp_hash_end);
1039 if (unlikely(*start == 1 && *hash == 0))
1042 LASSERTF(*start <= *hash, "start = %#llx"
1043 ",end = %#llx,hash = %#llx\n",
1044 *start, *end, *hash);
1045 CDEBUG(D_VFSTRACE, "offset %lx [%#llx %#llx],"
1046 " hash %#llx\n", offset, *start, *end, *hash);
1049 mdc_release_page(page, 0);
1051 } else if (*end != *start && *hash == *end) {
1053 * upon hash collision, remove this page,
1054 * otherwise put page reference, and
1055 * mdc_read_page_remote() will issue RPC to
1056 * fetch the page we want.
1059 mdc_release_page(page,
1060 le32_to_cpu(dp->ldp_flags) & LDF_COLLIDE);
1065 page = ERR_PTR(-EIO);
1068 spin_unlock_irq(&mapping->tree_lock);
1075 * Adjust a set of pages, each page containing an array of lu_dirpages,
1076 * so that each page can be used as a single logical lu_dirpage.
1078 * A lu_dirpage is laid out as follows, where s = ldp_hash_start,
1079 * e = ldp_hash_end, f = ldp_flags, p = padding, and each "ent" is a
1080 * struct lu_dirent. It has size up to LU_PAGE_SIZE. The ldp_hash_end
1081 * value is used as a cookie to request the next lu_dirpage in a
1082 * directory listing that spans multiple pages (two in this example):
1085 * .|--------v------- -----.
1086 * |s|e|f|p|ent|ent| ... |ent|
1087 * '--|-------------- -----' Each PAGE contains a single
1088 * '------. lu_dirpage.
1089 * .---------v------- -----.
1090 * |s|e|f|p|ent| 0 | ... | 0 |
1091 * '----------------- -----'
1093 * However, on hosts where the native VM page size (PAGE_SIZE) is
1094 * larger than LU_PAGE_SIZE, a single host page may contain multiple
1095 * lu_dirpages. After reading the lu_dirpages from the MDS, the
1096 * ldp_hash_end of the first lu_dirpage refers to the one immediately
1097 * after it in the same PAGE (arrows simplified for brevity, but
1098 * in general e0==s1, e1==s2, etc.):
1100 * .-------------------- -----.
1101 * |s0|e0|f0|p|ent|ent| ... |ent|
1102 * |---v---------------- -----|
1103 * |s1|e1|f1|p|ent|ent| ... |ent|
1104 * |---v---------------- -----| Here, each PAGE contains
1105 * ... multiple lu_dirpages.
1106 * |---v---------------- -----|
1107 * |s'|e'|f'|p|ent|ent| ... |ent|
1108 * '---|---------------- -----'
1110 * .----------------------------.
1113 * This structure is transformed into a single logical lu_dirpage as follows:
1115 * - Replace e0 with e' so the request for the next lu_dirpage gets the page
1116 * labeled 'next PAGE'.
1118 * - Copy the LDF_COLLIDE flag from f' to f0 to correctly reflect whether
1119 * a hash collision with the next page exists.
1121 * - Adjust the lde_reclen of the ending entry of each lu_dirpage to span
1122 * to the first entry of the next lu_dirpage.
1124 #if PAGE_SIZE > LU_PAGE_SIZE
1125 static void mdc_adjust_dirpages(struct page **pages, int cfs_pgs, int lu_pgs)
1129 for (i = 0; i < cfs_pgs; i++) {
1130 struct lu_dirpage *dp = kmap(pages[i]);
1131 struct lu_dirpage *first = dp;
1132 struct lu_dirent *end_dirent = NULL;
1133 struct lu_dirent *ent;
1134 __u64 hash_end = le64_to_cpu(dp->ldp_hash_end);
1135 __u32 flags = le32_to_cpu(dp->ldp_flags);
1137 while (--lu_pgs > 0) {
1138 ent = lu_dirent_start(dp);
1139 for (end_dirent = ent; ent != NULL;
1140 end_dirent = ent, ent = lu_dirent_next(ent));
1142 /* Advance dp to next lu_dirpage. */
1143 dp = (struct lu_dirpage *)((char *)dp + LU_PAGE_SIZE);
1145 /* Check if we've reached the end of the PAGE. */
1146 if (!((unsigned long)dp & ~PAGE_MASK))
1149 /* Save the hash and flags of this lu_dirpage. */
1150 hash_end = le64_to_cpu(dp->ldp_hash_end);
1151 flags = le32_to_cpu(dp->ldp_flags);
1153 /* Check if lu_dirpage contains no entries. */
1154 if (end_dirent == NULL)
1157 /* Enlarge the end entry lde_reclen from 0 to
1158 * first entry of next lu_dirpage. */
1159 LASSERT(le16_to_cpu(end_dirent->lde_reclen) == 0);
1160 end_dirent->lde_reclen =
1161 cpu_to_le16((char *)(dp->ldp_entries) -
1162 (char *)end_dirent);
1165 first->ldp_hash_end = hash_end;
1166 first->ldp_flags &= ~cpu_to_le32(LDF_COLLIDE);
1167 first->ldp_flags |= flags & cpu_to_le32(LDF_COLLIDE);
1171 LASSERTF(lu_pgs == 0, "left = %d\n", lu_pgs);
1174 #define mdc_adjust_dirpages(pages, cfs_pgs, lu_pgs) do {} while (0)
1175 #endif /* PAGE_SIZE > LU_PAGE_SIZE */
1177 /* parameters for readdir page */
1178 struct readpage_param {
1179 struct md_op_data *rp_mod;
1182 struct obd_export *rp_exp;
1183 struct md_callback *rp_cb;
1186 #ifndef HAVE_DELETE_FROM_PAGE_CACHE
1187 static inline void delete_from_page_cache(struct page *page)
1189 remove_from_page_cache(page);
1195 * Read pages from server.
1197 * Page in MDS_READPAGE RPC is packed in LU_PAGE_SIZE, and each page contains
1198 * a header lu_dirpage which describes the start/end hash, and whether this
1199 * page is empty (contains no dir entry) or hash collide with next page.
1200 * After client receives reply, several pages will be integrated into dir page
1201 * in PAGE_SIZE (if PAGE_SIZE greater than LU_PAGE_SIZE), and the
1202 * lu_dirpage for this integrated page will be adjusted.
1204 static int mdc_read_page_remote(void *data, struct page *page0)
1206 struct readpage_param *rp = data;
1207 struct page **page_pool;
1209 struct lu_dirpage *dp;
1210 struct md_op_data *op_data = rp->rp_mod;
1211 struct ptlrpc_request *req;
1213 struct inode *inode;
1215 int rd_pgs = 0; /* number of pages actually read */
1221 max_pages = rp->rp_exp->exp_obd->u.cli.cl_max_pages_per_rpc;
1222 inode = op_data->op_data;
1223 fid = &op_data->op_fid1;
1224 LASSERT(inode != NULL);
1226 OBD_ALLOC(page_pool, sizeof(page_pool[0]) * max_pages);
1227 if (page_pool != NULL) {
1228 page_pool[0] = page0;
1234 for (npages = 1; npages < max_pages; npages++) {
1235 page = page_cache_alloc_cold(inode->i_mapping);
1238 page_pool[npages] = page;
1241 rc = mdc_getpage(rp->rp_exp, fid, rp->rp_off, page_pool, npages, &req);
1243 /* page0 is special, which was added into page cache early */
1244 delete_from_page_cache(page0);
1248 rd_pgs = (req->rq_bulk->bd_nob_transferred + PAGE_SIZE - 1) >>
1250 lu_pgs = req->rq_bulk->bd_nob_transferred >> LU_PAGE_SHIFT;
1251 LASSERT(!(req->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK));
1253 CDEBUG(D_INODE, "read %d(%d) pages\n", rd_pgs, lu_pgs);
1255 mdc_adjust_dirpages(page_pool, rd_pgs, lu_pgs);
1257 SetPageUptodate(page0);
1261 ptlrpc_req_finished(req);
1262 CDEBUG(D_CACHE, "read %d/%d pages\n", rd_pgs, npages);
1263 for (i = 1; i < npages; i++) {
1264 unsigned long offset;
1268 page = page_pool[i];
1270 if (rc < 0 || i >= rd_pgs) {
1275 SetPageUptodate(page);
1278 hash = le64_to_cpu(dp->ldp_hash_start);
1281 offset = hash_x_index(hash, rp->rp_hash64);
1283 prefetchw(&page->flags);
1284 ret = add_to_page_cache_lru(page, inode->i_mapping, offset,
1289 CDEBUG(D_VFSTRACE, "page %lu add to page cache failed:"
1290 " rc = %d\n", offset, ret);
1294 if (page_pool != &page0)
1295 OBD_FREE(page_pool, sizeof(page_pool[0]) * max_pages);
1301 * Read dir page from cache first, if it can not find it, read it from
1302 * server and add into the cache.
1304 * \param[in] exp MDC export
1305 * \param[in] op_data client MD stack parameters, transfering parameters
1306 * between different layers on client MD stack.
1307 * \param[in] cb_op callback required for ldlm lock enqueue during
1309 * \param[in] hash_offset the hash offset of the page to be read
1310 * \param[in] ppage the page to be read
1312 * retval = 0 get the page successfully
1313 * errno(<0) get the page failed
1315 static int mdc_read_page(struct obd_export *exp, struct md_op_data *op_data,
1316 struct md_callback *cb_op, __u64 hash_offset,
1317 struct page **ppage)
1319 struct lookup_intent it = { .it_op = IT_READDIR };
1321 struct inode *dir = op_data->op_data;
1322 struct address_space *mapping;
1323 struct lu_dirpage *dp;
1326 struct lustre_handle lockh;
1327 struct ptlrpc_request *enq_req = NULL;
1328 struct readpage_param rp_param;
1335 LASSERT(dir != NULL);
1336 mapping = dir->i_mapping;
1338 rc = mdc_intent_lock(exp, op_data, &it, &enq_req,
1339 cb_op->md_blocking_ast, 0);
1340 if (enq_req != NULL)
1341 ptlrpc_req_finished(enq_req);
1344 CERROR("%s: "DFID" lock enqueue fails: rc = %d\n",
1345 exp->exp_obd->obd_name, PFID(&op_data->op_fid1), rc);
1350 lockh.cookie = it.it_lock_handle;
1351 mdc_set_lock_data(exp, &lockh, dir, NULL);
1353 rp_param.rp_off = hash_offset;
1354 rp_param.rp_hash64 = op_data->op_cli_flags & CLI_HASH64;
1355 page = mdc_page_locate(mapping, &rp_param.rp_off, &start, &end,
1356 rp_param.rp_hash64);
1358 CERROR("%s: dir page locate: "DFID" at %llu: rc %ld\n",
1359 exp->exp_obd->obd_name, PFID(&op_data->op_fid1),
1360 rp_param.rp_off, PTR_ERR(page));
1361 GOTO(out_unlock, rc = PTR_ERR(page));
1362 } else if (page != NULL) {
1364 * XXX nikita: not entirely correct handling of a corner case:
1365 * suppose hash chain of entries with hash value HASH crosses
1366 * border between pages P0 and P1. First both P0 and P1 are
1367 * cached, seekdir() is called for some entry from the P0 part
1368 * of the chain. Later P0 goes out of cache. telldir(HASH)
1369 * happens and finds P1, as it starts with matching hash
1370 * value. Remaining entries from P0 part of the chain are
1371 * skipped. (Is that really a bug?)
1373 * Possible solutions: 0. don't cache P1 is such case, handle
1374 * it as an "overflow" page. 1. invalidate all pages at
1375 * once. 2. use HASH|1 as an index for P1.
1377 GOTO(hash_collision, page);
1380 rp_param.rp_exp = exp;
1381 rp_param.rp_mod = op_data;
1382 page = read_cache_page(mapping,
1383 hash_x_index(rp_param.rp_off,
1384 rp_param.rp_hash64),
1385 mdc_read_page_remote, &rp_param);
1387 CDEBUG(D_INFO, "%s: read cache page: "DFID" at %llu: %ld\n",
1388 exp->exp_obd->obd_name, PFID(&op_data->op_fid1),
1389 rp_param.rp_off, PTR_ERR(page));
1390 GOTO(out_unlock, rc = PTR_ERR(page));
1393 wait_on_page_locked(page);
1395 if (!PageUptodate(page)) {
1396 CERROR("%s: page not updated: "DFID" at %llu: rc %d\n",
1397 exp->exp_obd->obd_name, PFID(&op_data->op_fid1),
1398 rp_param.rp_off, -5);
1401 if (!PageChecked(page))
1402 SetPageChecked(page);
1403 if (PageError(page)) {
1404 CERROR("%s: page error: "DFID" at %llu: rc %d\n",
1405 exp->exp_obd->obd_name, PFID(&op_data->op_fid1),
1406 rp_param.rp_off, -5);
1411 dp = page_address(page);
1412 if (BITS_PER_LONG == 32 && rp_param.rp_hash64) {
1413 start = le64_to_cpu(dp->ldp_hash_start) >> 32;
1414 end = le64_to_cpu(dp->ldp_hash_end) >> 32;
1415 rp_param.rp_off = hash_offset >> 32;
1417 start = le64_to_cpu(dp->ldp_hash_start);
1418 end = le64_to_cpu(dp->ldp_hash_end);
1419 rp_param.rp_off = hash_offset;
1422 LASSERT(start == rp_param.rp_off);
1423 CWARN("Page-wide hash collision: %#lx\n", (unsigned long)end);
1424 #if BITS_PER_LONG == 32
1425 CWARN("Real page-wide hash collision at [%llu %llu] with "
1426 "hash %llu\n", le64_to_cpu(dp->ldp_hash_start),
1427 le64_to_cpu(dp->ldp_hash_end), hash_offset);
1431 * Fetch whole overflow chain...
1439 ldlm_lock_decref(&lockh, it.it_lock_mode);
1443 mdc_release_page(page, 1);
1449 static int mdc_statfs(const struct lu_env *env,
1450 struct obd_export *exp, struct obd_statfs *osfs,
1451 __u64 max_age, __u32 flags)
1453 struct obd_device *obd = class_exp2obd(exp);
1454 struct ptlrpc_request *req;
1455 struct obd_statfs *msfs;
1456 struct obd_import *imp = NULL;
1461 * Since the request might also come from lprocfs, so we need
1462 * sync this with client_disconnect_export Bug15684
1464 down_read(&obd->u.cli.cl_sem);
1465 if (obd->u.cli.cl_import)
1466 imp = class_import_get(obd->u.cli.cl_import);
1467 up_read(&obd->u.cli.cl_sem);
1471 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_STATFS,
1472 LUSTRE_MDS_VERSION, MDS_STATFS);
1474 GOTO(output, rc = -ENOMEM);
1476 ptlrpc_request_set_replen(req);
1478 if (flags & OBD_STATFS_NODELAY) {
1479 /* procfs requests not want stay in wait for avoid deadlock */
1480 req->rq_no_resend = 1;
1481 req->rq_no_delay = 1;
1484 rc = ptlrpc_queue_wait(req);
1486 /* check connection error first */
1487 if (imp->imp_connect_error)
1488 rc = imp->imp_connect_error;
1492 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
1494 GOTO(out, rc = -EPROTO);
1499 ptlrpc_req_finished(req);
1501 class_import_put(imp);
1505 static int mdc_ioc_fid2path(struct obd_export *exp, struct getinfo_fid2path *gf)
1507 __u32 keylen, vallen;
1511 if (gf->gf_pathlen > PATH_MAX)
1512 RETURN(-ENAMETOOLONG);
1513 if (gf->gf_pathlen < 2)
1516 /* Key is KEY_FID2PATH + getinfo_fid2path description */
1517 keylen = cfs_size_round(sizeof(KEY_FID2PATH) + sizeof(*gf) +
1518 sizeof(struct lu_fid));
1519 OBD_ALLOC(key, keylen);
1522 memcpy(key, KEY_FID2PATH, sizeof(KEY_FID2PATH));
1523 memcpy(key + cfs_size_round(sizeof(KEY_FID2PATH)), gf, sizeof(*gf));
1524 memcpy(key + cfs_size_round(sizeof(KEY_FID2PATH)) + sizeof(*gf),
1525 gf->gf_u.gf_root_fid, sizeof(struct lu_fid));
1526 CDEBUG(D_IOCTL, "path get "DFID" from %llu #%d\n",
1527 PFID(&gf->gf_fid), gf->gf_recno, gf->gf_linkno);
1529 if (!fid_is_sane(&gf->gf_fid))
1530 GOTO(out, rc = -EINVAL);
1532 /* Val is struct getinfo_fid2path result plus path */
1533 vallen = sizeof(*gf) + gf->gf_pathlen;
1535 rc = obd_get_info(NULL, exp, keylen, key, &vallen, gf);
1536 if (rc != 0 && rc != -EREMOTE)
1539 if (vallen <= sizeof(*gf))
1540 GOTO(out, rc = -EPROTO);
1541 if (vallen > sizeof(*gf) + gf->gf_pathlen)
1542 GOTO(out, rc = -EOVERFLOW);
1544 CDEBUG(D_IOCTL, "path got "DFID" from %llu #%d: %s\n",
1545 PFID(&gf->gf_fid), gf->gf_recno, gf->gf_linkno,
1546 gf->gf_pathlen < 512 ? gf->gf_u.gf_path :
1547 /* only log the last 512 characters of the path */
1548 gf->gf_u.gf_path + gf->gf_pathlen - 512);
1551 OBD_FREE(key, keylen);
1555 static int mdc_ioc_hsm_progress(struct obd_export *exp,
1556 struct hsm_progress_kernel *hpk)
1558 struct obd_import *imp = class_exp2cliimp(exp);
1559 struct hsm_progress_kernel *req_hpk;
1560 struct ptlrpc_request *req;
1564 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_PROGRESS,
1565 LUSTRE_MDS_VERSION, MDS_HSM_PROGRESS);
1567 GOTO(out, rc = -ENOMEM);
1569 mdc_pack_body(req, NULL, 0, 0, -1, 0);
1571 /* Copy hsm_progress struct */
1572 req_hpk = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_PROGRESS);
1573 if (req_hpk == NULL)
1574 GOTO(out, rc = -EPROTO);
1577 req_hpk->hpk_errval = lustre_errno_hton(hpk->hpk_errval);
1579 ptlrpc_request_set_replen(req);
1581 mdc_get_mod_rpc_slot(req, NULL);
1582 rc = ptlrpc_queue_wait(req);
1583 mdc_put_mod_rpc_slot(req, NULL);
1587 ptlrpc_req_finished(req);
1591 static int mdc_ioc_hsm_ct_register(struct obd_import *imp, __u32 archives)
1593 __u32 *archive_mask;
1594 struct ptlrpc_request *req;
1598 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_CT_REGISTER,
1600 MDS_HSM_CT_REGISTER);
1602 GOTO(out, rc = -ENOMEM);
1604 mdc_pack_body(req, NULL, 0, 0, -1, 0);
1606 /* Copy hsm_progress struct */
1607 archive_mask = req_capsule_client_get(&req->rq_pill,
1608 &RMF_MDS_HSM_ARCHIVE);
1609 if (archive_mask == NULL)
1610 GOTO(out, rc = -EPROTO);
1612 *archive_mask = archives;
1614 ptlrpc_request_set_replen(req);
1616 rc = mdc_queue_wait(req);
1619 ptlrpc_req_finished(req);
1623 static int mdc_ioc_hsm_current_action(struct obd_export *exp,
1624 struct md_op_data *op_data)
1626 struct hsm_current_action *hca = op_data->op_data;
1627 struct hsm_current_action *req_hca;
1628 struct ptlrpc_request *req;
1632 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
1633 &RQF_MDS_HSM_ACTION);
1637 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_ACTION);
1639 ptlrpc_request_free(req);
1643 mdc_pack_body(req, &op_data->op_fid1, 0, 0,
1644 op_data->op_suppgids[0], 0);
1646 ptlrpc_request_set_replen(req);
1648 rc = mdc_queue_wait(req);
1652 req_hca = req_capsule_server_get(&req->rq_pill,
1653 &RMF_MDS_HSM_CURRENT_ACTION);
1654 if (req_hca == NULL)
1655 GOTO(out, rc = -EPROTO);
1661 ptlrpc_req_finished(req);
1665 static int mdc_ioc_hsm_ct_unregister(struct obd_import *imp)
1667 struct ptlrpc_request *req;
1671 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_CT_UNREGISTER,
1673 MDS_HSM_CT_UNREGISTER);
1675 GOTO(out, rc = -ENOMEM);
1677 mdc_pack_body(req, NULL, 0, 0, -1, 0);
1679 ptlrpc_request_set_replen(req);
1681 rc = mdc_queue_wait(req);
1684 ptlrpc_req_finished(req);
1688 static int mdc_ioc_hsm_state_get(struct obd_export *exp,
1689 struct md_op_data *op_data)
1691 struct hsm_user_state *hus = op_data->op_data;
1692 struct hsm_user_state *req_hus;
1693 struct ptlrpc_request *req;
1697 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
1698 &RQF_MDS_HSM_STATE_GET);
1702 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_STATE_GET);
1704 ptlrpc_request_free(req);
1708 mdc_pack_body(req, &op_data->op_fid1, 0, 0,
1709 op_data->op_suppgids[0], 0);
1711 ptlrpc_request_set_replen(req);
1713 rc = mdc_queue_wait(req);
1717 req_hus = req_capsule_server_get(&req->rq_pill, &RMF_HSM_USER_STATE);
1718 if (req_hus == NULL)
1719 GOTO(out, rc = -EPROTO);
1725 ptlrpc_req_finished(req);
1729 static int mdc_ioc_hsm_state_set(struct obd_export *exp,
1730 struct md_op_data *op_data)
1732 struct hsm_state_set *hss = op_data->op_data;
1733 struct hsm_state_set *req_hss;
1734 struct ptlrpc_request *req;
1738 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
1739 &RQF_MDS_HSM_STATE_SET);
1743 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_STATE_SET);
1745 ptlrpc_request_free(req);
1749 mdc_pack_body(req, &op_data->op_fid1, 0, 0,
1750 op_data->op_suppgids[0], 0);
1753 req_hss = req_capsule_client_get(&req->rq_pill, &RMF_HSM_STATE_SET);
1754 if (req_hss == NULL)
1755 GOTO(out, rc = -EPROTO);
1758 ptlrpc_request_set_replen(req);
1760 mdc_get_mod_rpc_slot(req, NULL);
1761 rc = ptlrpc_queue_wait(req);
1762 mdc_put_mod_rpc_slot(req, NULL);
1766 ptlrpc_req_finished(req);
1770 static int mdc_ioc_hsm_request(struct obd_export *exp,
1771 struct hsm_user_request *hur)
1773 struct obd_import *imp = class_exp2cliimp(exp);
1774 struct ptlrpc_request *req;
1775 struct hsm_request *req_hr;
1776 struct hsm_user_item *req_hui;
1781 req = ptlrpc_request_alloc(imp, &RQF_MDS_HSM_REQUEST);
1783 GOTO(out, rc = -ENOMEM);
1785 req_capsule_set_size(&req->rq_pill, &RMF_MDS_HSM_USER_ITEM, RCL_CLIENT,
1786 hur->hur_request.hr_itemcount
1787 * sizeof(struct hsm_user_item));
1788 req_capsule_set_size(&req->rq_pill, &RMF_GENERIC_DATA, RCL_CLIENT,
1789 hur->hur_request.hr_data_len);
1791 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_REQUEST);
1793 ptlrpc_request_free(req);
1797 mdc_pack_body(req, NULL, 0, 0, -1, 0);
1799 /* Copy hsm_request struct */
1800 req_hr = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_REQUEST);
1802 GOTO(out, rc = -EPROTO);
1803 *req_hr = hur->hur_request;
1805 /* Copy hsm_user_item structs */
1806 req_hui = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_USER_ITEM);
1807 if (req_hui == NULL)
1808 GOTO(out, rc = -EPROTO);
1809 memcpy(req_hui, hur->hur_user_item,
1810 hur->hur_request.hr_itemcount * sizeof(struct hsm_user_item));
1812 /* Copy opaque field */
1813 req_opaque = req_capsule_client_get(&req->rq_pill, &RMF_GENERIC_DATA);
1814 if (req_opaque == NULL)
1815 GOTO(out, rc = -EPROTO);
1816 memcpy(req_opaque, hur_data(hur), hur->hur_request.hr_data_len);
1818 ptlrpc_request_set_replen(req);
1820 mdc_get_mod_rpc_slot(req, NULL);
1821 rc = ptlrpc_queue_wait(req);
1822 mdc_put_mod_rpc_slot(req, NULL);
1827 ptlrpc_req_finished(req);
1831 static int mdc_ioc_hsm_ct_start(struct obd_export *exp,
1832 struct lustre_kernelcomm *lk);
1834 static int mdc_quotactl(struct obd_device *unused, struct obd_export *exp,
1835 struct obd_quotactl *oqctl)
1837 struct ptlrpc_request *req;
1838 struct obd_quotactl *oqc;
1842 req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
1843 &RQF_MDS_QUOTACTL, LUSTRE_MDS_VERSION,
1848 oqc = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1851 ptlrpc_request_set_replen(req);
1852 ptlrpc_at_set_req_timeout(req);
1853 req->rq_no_resend = 1;
1855 rc = ptlrpc_queue_wait(req);
1857 CERROR("ptlrpc_queue_wait failed, rc: %d\n", rc);
1859 if (req->rq_repmsg &&
1860 (oqc = req_capsule_server_get(&req->rq_pill, &RMF_OBD_QUOTACTL))) {
1863 CERROR ("Can't unpack obd_quotactl\n");
1866 ptlrpc_req_finished(req);
1871 static int mdc_ioc_swap_layouts(struct obd_export *exp,
1872 struct md_op_data *op_data)
1874 struct list_head cancels = LIST_HEAD_INIT(cancels);
1875 struct ptlrpc_request *req;
1877 struct mdc_swap_layouts *msl, *payload;
1880 msl = op_data->op_data;
1882 /* When the MDT will get the MDS_SWAP_LAYOUTS RPC the
1883 * first thing it will do is to cancel the 2 layout
1884 * locks held by this client.
1885 * So the client must cancel its layout locks on the 2 fids
1886 * with the request RPC to avoid extra RPC round trips.
1888 count = mdc_resource_get_unused(exp, &op_data->op_fid1, &cancels,
1889 LCK_EX, MDS_INODELOCK_LAYOUT |
1890 MDS_INODELOCK_XATTR);
1891 count += mdc_resource_get_unused(exp, &op_data->op_fid2, &cancels,
1892 LCK_EX, MDS_INODELOCK_LAYOUT |
1893 MDS_INODELOCK_XATTR);
1895 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
1896 &RQF_MDS_SWAP_LAYOUTS);
1898 ldlm_lock_list_put(&cancels, l_bl_ast, count);
1902 rc = mdc_prep_elc_req(exp, req, MDS_SWAP_LAYOUTS, &cancels, count);
1904 ptlrpc_request_free(req);
1908 mdc_swap_layouts_pack(req, op_data);
1910 payload = req_capsule_client_get(&req->rq_pill, &RMF_SWAP_LAYOUTS);
1915 ptlrpc_request_set_replen(req);
1917 rc = ptlrpc_queue_wait(req);
1923 ptlrpc_req_finished(req);
1927 static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1928 void *karg, void __user *uarg)
1930 struct obd_device *obd = exp->exp_obd;
1931 struct obd_ioctl_data *data = karg;
1932 struct obd_import *imp = obd->u.cli.cl_import;
1936 if (!try_module_get(THIS_MODULE)) {
1937 CERROR("%s: cannot get module '%s'\n", obd->obd_name,
1938 module_name(THIS_MODULE));
1942 case OBD_IOC_FID2PATH:
1943 rc = mdc_ioc_fid2path(exp, karg);
1945 case LL_IOC_HSM_CT_START:
1946 rc = mdc_ioc_hsm_ct_start(exp, karg);
1947 /* ignore if it was already registered on this MDS. */
1951 case LL_IOC_HSM_PROGRESS:
1952 rc = mdc_ioc_hsm_progress(exp, karg);
1954 case LL_IOC_HSM_STATE_GET:
1955 rc = mdc_ioc_hsm_state_get(exp, karg);
1957 case LL_IOC_HSM_STATE_SET:
1958 rc = mdc_ioc_hsm_state_set(exp, karg);
1960 case LL_IOC_HSM_ACTION:
1961 rc = mdc_ioc_hsm_current_action(exp, karg);
1963 case LL_IOC_HSM_REQUEST:
1964 rc = mdc_ioc_hsm_request(exp, karg);
1966 case OBD_IOC_CLIENT_RECOVER:
1967 rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1, 0);
1971 case IOC_OSC_SET_ACTIVE:
1972 rc = ptlrpc_set_import_active(imp, data->ioc_offset);
1974 case OBD_IOC_PING_TARGET:
1975 rc = ptlrpc_obd_ping(obd);
1978 * Normally IOC_OBD_STATFS, OBD_IOC_QUOTACTL iocontrol are handled by
1979 * LMV instead of MDC. But when the cluster is upgraded from 1.8,
1980 * there'd be no LMV layer thus we might be called here. Eventually
1981 * this code should be removed.
1984 case IOC_OBD_STATFS: {
1985 struct obd_statfs stat_buf = {0};
1987 if (*((__u32 *) data->ioc_inlbuf2) != 0)
1988 GOTO(out, rc = -ENODEV);
1991 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(obd),
1992 min((int)data->ioc_plen2,
1993 (int)sizeof(struct obd_uuid))))
1994 GOTO(out, rc = -EFAULT);
1996 rc = mdc_statfs(NULL, obd->obd_self_export, &stat_buf,
1997 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
2002 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
2003 min((int) data->ioc_plen1,
2004 (int) sizeof(stat_buf))))
2005 GOTO(out, rc = -EFAULT);
2009 case OBD_IOC_QUOTACTL: {
2010 struct if_quotactl *qctl = karg;
2011 struct obd_quotactl *oqctl;
2013 OBD_ALLOC_PTR(oqctl);
2015 GOTO(out, rc = -ENOMEM);
2017 QCTL_COPY(oqctl, qctl);
2018 rc = obd_quotactl(exp, oqctl);
2020 QCTL_COPY(qctl, oqctl);
2021 qctl->qc_valid = QC_MDTIDX;
2022 qctl->obd_uuid = obd->u.cli.cl_target_uuid;
2025 OBD_FREE_PTR(oqctl);
2028 case LL_IOC_GET_CONNECT_FLAGS:
2029 if (copy_to_user(uarg, exp_connect_flags_ptr(exp),
2030 sizeof(*exp_connect_flags_ptr(exp))))
2031 GOTO(out, rc = -EFAULT);
2034 case LL_IOC_LOV_SWAP_LAYOUTS:
2035 rc = mdc_ioc_swap_layouts(exp, karg);
2038 CERROR("unrecognised ioctl: cmd = %#x\n", cmd);
2039 GOTO(out, rc = -ENOTTY);
2042 module_put(THIS_MODULE);
2047 static int mdc_get_info_rpc(struct obd_export *exp,
2048 u32 keylen, void *key,
2049 u32 vallen, void *val)
2051 struct obd_import *imp = class_exp2cliimp(exp);
2052 struct ptlrpc_request *req;
2057 req = ptlrpc_request_alloc(imp, &RQF_MDS_GET_INFO);
2061 req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_KEY,
2062 RCL_CLIENT, keylen);
2063 req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_VALLEN,
2064 RCL_CLIENT, sizeof(vallen));
2066 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GET_INFO);
2068 ptlrpc_request_free(req);
2072 tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_KEY);
2073 memcpy(tmp, key, keylen);
2074 tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_VALLEN);
2075 memcpy(tmp, &vallen, sizeof(vallen));
2077 req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_VAL,
2078 RCL_SERVER, vallen);
2079 ptlrpc_request_set_replen(req);
2081 rc = ptlrpc_queue_wait(req);
2082 /* -EREMOTE means the get_info result is partial, and it needs to
2083 * continue on another MDT, see fid2path part in lmv_iocontrol */
2084 if (rc == 0 || rc == -EREMOTE) {
2085 tmp = req_capsule_server_get(&req->rq_pill, &RMF_GETINFO_VAL);
2086 memcpy(val, tmp, vallen);
2087 if (ptlrpc_rep_need_swab(req)) {
2088 if (KEY_IS(KEY_FID2PATH))
2089 lustre_swab_fid2path(val);
2092 ptlrpc_req_finished(req);
2097 static void lustre_swab_hai(struct hsm_action_item *h)
2099 __swab32s(&h->hai_len);
2100 __swab32s(&h->hai_action);
2101 lustre_swab_lu_fid(&h->hai_fid);
2102 lustre_swab_lu_fid(&h->hai_dfid);
2103 __swab64s(&h->hai_cookie);
2104 __swab64s(&h->hai_extent.offset);
2105 __swab64s(&h->hai_extent.length);
2106 __swab64s(&h->hai_gid);
2109 static void lustre_swab_hal(struct hsm_action_list *h)
2111 struct hsm_action_item *hai;
2114 __swab32s(&h->hal_version);
2115 __swab32s(&h->hal_count);
2116 __swab32s(&h->hal_archive_id);
2117 __swab64s(&h->hal_flags);
2119 for (i = 0; i < h->hal_count; i++, hai = hai_next(hai))
2120 lustre_swab_hai(hai);
2123 static void lustre_swab_kuch(struct kuc_hdr *l)
2125 __swab16s(&l->kuc_magic);
2126 /* __u8 l->kuc_transport */
2127 __swab16s(&l->kuc_msgtype);
2128 __swab16s(&l->kuc_msglen);
2131 static int mdc_ioc_hsm_ct_start(struct obd_export *exp,
2132 struct lustre_kernelcomm *lk)
2134 struct obd_import *imp = class_exp2cliimp(exp);
2135 __u32 archive = lk->lk_data;
2138 if (lk->lk_group != KUC_GRP_HSM) {
2139 CERROR("Bad copytool group %d\n", lk->lk_group);
2143 CDEBUG(D_HSM, "CT start r%d w%d u%d g%d f%#x\n", lk->lk_rfd, lk->lk_wfd,
2144 lk->lk_uid, lk->lk_group, lk->lk_flags);
2146 if (lk->lk_flags & LK_FLG_STOP) {
2147 /* Unregister with the coordinator */
2148 rc = mdc_ioc_hsm_ct_unregister(imp);
2150 rc = mdc_ioc_hsm_ct_register(imp, archive);
2157 * Send a message to any listening copytools
2158 * @param val KUC message (kuc_hdr + hsm_action_list)
2159 * @param len total length of message
2161 static int mdc_hsm_copytool_send(size_t len, void *val)
2163 struct kuc_hdr *lh = (struct kuc_hdr *)val;
2164 struct hsm_action_list *hal = (struct hsm_action_list *)(lh + 1);
2168 if (len < sizeof(*lh) + sizeof(*hal)) {
2169 CERROR("Short HSM message %zu < %zu\n", len,
2170 sizeof(*lh) + sizeof(*hal));
2173 if (lh->kuc_magic == __swab16(KUC_MAGIC)) {
2174 lustre_swab_kuch(lh);
2175 lustre_swab_hal(hal);
2176 } else if (lh->kuc_magic != KUC_MAGIC) {
2177 CERROR("Bad magic %x!=%x\n", lh->kuc_magic, KUC_MAGIC);
2181 CDEBUG(D_HSM, " Received message mg=%x t=%d m=%d l=%d actions=%d "
2183 lh->kuc_magic, lh->kuc_transport, lh->kuc_msgtype,
2184 lh->kuc_msglen, hal->hal_count, hal->hal_fsname);
2186 /* Broadcast to HSM listeners */
2187 rc = libcfs_kkuc_group_put(KUC_GRP_HSM, lh);
2193 * callback function passed to kuc for re-registering each HSM copytool
2194 * running on MDC, after MDT shutdown/recovery.
2195 * @param data copytool registration data
2196 * @param cb_arg callback argument (obd_import)
2198 static int mdc_hsm_ct_reregister(void *data, void *cb_arg)
2200 struct kkuc_ct_data *kcd = data;
2201 struct obd_import *imp = (struct obd_import *)cb_arg;
2204 if (kcd == NULL || kcd->kcd_magic != KKUC_CT_DATA_MAGIC)
2207 if (!obd_uuid_equals(&kcd->kcd_uuid, &imp->imp_obd->obd_uuid))
2210 CDEBUG(D_HA, "%s: recover copytool registration to MDT (archive=%#x)\n",
2211 imp->imp_obd->obd_name, kcd->kcd_archive);
2212 rc = mdc_ioc_hsm_ct_register(imp, kcd->kcd_archive);
2214 /* ignore error if the copytool is already registered */
2215 return (rc == -EEXIST) ? 0 : rc;
2219 * Re-establish all kuc contexts with MDT
2220 * after MDT shutdown/recovery.
2222 static int mdc_kuc_reregister(struct obd_import *imp)
2224 /* re-register HSM agents */
2225 return libcfs_kkuc_group_foreach(KUC_GRP_HSM, mdc_hsm_ct_reregister,
2229 static int mdc_set_info_async(const struct lu_env *env,
2230 struct obd_export *exp,
2231 u32 keylen, void *key,
2232 u32 vallen, void *val,
2233 struct ptlrpc_request_set *set)
2235 struct obd_import *imp = class_exp2cliimp(exp);
2239 if (KEY_IS(KEY_READ_ONLY)) {
2240 if (vallen != sizeof(int))
2243 spin_lock(&imp->imp_lock);
2244 if (*((int *)val)) {
2245 imp->imp_connect_flags_orig |= OBD_CONNECT_RDONLY;
2246 imp->imp_connect_data.ocd_connect_flags |=
2249 imp->imp_connect_flags_orig &= ~OBD_CONNECT_RDONLY;
2250 imp->imp_connect_data.ocd_connect_flags &=
2251 ~OBD_CONNECT_RDONLY;
2253 spin_unlock(&imp->imp_lock);
2255 rc = do_set_info_async(imp, MDS_SET_INFO, LUSTRE_MDS_VERSION,
2256 keylen, key, vallen, val, set);
2259 if (KEY_IS(KEY_CHANGELOG_CLEAR)) {
2260 rc = do_set_info_async(imp, MDS_SET_INFO, LUSTRE_MDS_VERSION,
2261 keylen, key, vallen, val, set);
2264 if (KEY_IS(KEY_HSM_COPYTOOL_SEND)) {
2265 rc = mdc_hsm_copytool_send(vallen, val);
2269 if (KEY_IS(KEY_DEFAULT_EASIZE)) {
2270 __u32 *default_easize = val;
2272 exp->exp_obd->u.cli.cl_default_mds_easize = *default_easize;
2276 rc = osc_set_info_async(env, exp, keylen, key, vallen, val, set);
2280 static int mdc_get_info(const struct lu_env *env, struct obd_export *exp,
2281 __u32 keylen, void *key, __u32 *vallen, void *val)
2285 if (KEY_IS(KEY_MAX_EASIZE)) {
2286 __u32 mdsize, *max_easize;
2288 if (*vallen != sizeof(int))
2290 mdsize = *(__u32 *)val;
2291 if (mdsize > exp->exp_obd->u.cli.cl_max_mds_easize)
2292 exp->exp_obd->u.cli.cl_max_mds_easize = mdsize;
2294 *max_easize = exp->exp_obd->u.cli.cl_max_mds_easize;
2296 } else if (KEY_IS(KEY_DEFAULT_EASIZE)) {
2297 __u32 *default_easize;
2299 if (*vallen != sizeof(int))
2301 default_easize = val;
2302 *default_easize = exp->exp_obd->u.cli.cl_default_mds_easize;
2304 } else if (KEY_IS(KEY_CONN_DATA)) {
2305 struct obd_import *imp = class_exp2cliimp(exp);
2306 struct obd_connect_data *data = val;
2308 if (*vallen != sizeof(*data))
2311 *data = imp->imp_connect_data;
2313 } else if (KEY_IS(KEY_TGT_COUNT)) {
2314 *((__u32 *)val) = 1;
2318 rc = mdc_get_info_rpc(exp, keylen, key, *vallen, val);
2323 static int mdc_fsync(struct obd_export *exp, const struct lu_fid *fid,
2324 struct ptlrpc_request **request)
2326 struct ptlrpc_request *req;
2331 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_SYNC);
2335 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SYNC);
2337 ptlrpc_request_free(req);
2341 mdc_pack_body(req, fid, 0, 0, -1, 0);
2343 ptlrpc_request_set_replen(req);
2345 rc = ptlrpc_queue_wait(req);
2347 ptlrpc_req_finished(req);
2353 static int mdc_import_event(struct obd_device *obd, struct obd_import *imp,
2354 enum obd_import_event event)
2356 struct client_obd *cli = &obd->u.cli;
2359 LASSERT(imp->imp_obd == obd);
2362 case IMP_EVENT_DISCON:
2363 spin_lock(&cli->cl_loi_list_lock);
2364 cli->cl_avail_grant = 0;
2365 cli->cl_lost_grant = 0;
2366 spin_unlock(&cli->cl_loi_list_lock);
2368 case IMP_EVENT_INACTIVE:
2370 * Flush current sequence to make client obtain new one
2371 * from server in case of disconnect/reconnect.
2373 down_read(&cli->cl_seq_rwsem);
2375 seq_client_flush(cli->cl_seq);
2376 up_read(&cli->cl_seq_rwsem);
2378 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE);
2380 case IMP_EVENT_INVALIDATE: {
2381 struct ldlm_namespace *ns = obd->obd_namespace;
2385 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
2387 env = cl_env_get(&refcheck);
2389 /* Reset grants. All pages go to failing rpcs due to
2390 * the invalid import.
2392 osc_io_unplug(env, cli, NULL);
2394 cfs_hash_for_each_nolock(ns->ns_rs_hash,
2395 osc_ldlm_resource_invalidate,
2397 cl_env_put(env, &refcheck);
2398 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
2404 case IMP_EVENT_ACTIVE:
2405 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE);
2406 /* redo the kuc registration after reconnecting */
2408 rc = mdc_kuc_reregister(imp);
2410 case IMP_EVENT_OCD: {
2411 struct obd_connect_data *ocd = &imp->imp_connect_data;
2413 if (OCD_HAS_FLAG(ocd, GRANT))
2414 osc_init_grant(cli, ocd);
2416 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD);
2419 case IMP_EVENT_DEACTIVATE:
2420 case IMP_EVENT_ACTIVATE:
2423 CERROR("Unknown import event %x\n", event);
2429 int mdc_fid_alloc(const struct lu_env *env, struct obd_export *exp,
2430 struct lu_fid *fid, struct md_op_data *op_data)
2432 struct client_obd *cli = &exp->exp_obd->u.cli;
2437 down_read(&cli->cl_seq_rwsem);
2439 rc = seq_client_alloc_fid(env, cli->cl_seq, fid);
2440 up_read(&cli->cl_seq_rwsem);
2445 static struct obd_uuid *mdc_get_uuid(struct obd_export *exp)
2447 struct client_obd *cli = &exp->exp_obd->u.cli;
2448 return &cli->cl_target_uuid;
2452 * Determine whether the lock can be canceled before replaying it during
2453 * recovery, non zero value will be return if the lock can be canceled,
2454 * or zero returned for not
2456 static int mdc_cancel_weight(struct ldlm_lock *lock)
2458 if (lock->l_resource->lr_type != LDLM_IBITS)
2461 /* FIXME: if we ever get into a situation where there are too many
2462 * opened files with open locks on a single node, then we really
2463 * should replay these open locks to reget it */
2464 if (lock->l_policy_data.l_inodebits.bits & MDS_INODELOCK_OPEN)
2470 static int mdc_resource_inode_free(struct ldlm_resource *res)
2472 if (res->lr_lvb_inode)
2473 res->lr_lvb_inode = NULL;
2478 static struct ldlm_valblock_ops inode_lvbo = {
2479 .lvbo_free = mdc_resource_inode_free
2482 static int mdc_llog_init(struct obd_device *obd)
2484 struct obd_llog_group *olg = &obd->obd_olg;
2485 struct llog_ctxt *ctxt;
2490 rc = llog_setup(NULL, obd, olg, LLOG_CHANGELOG_REPL_CTXT, obd,
2495 ctxt = llog_group_get_ctxt(olg, LLOG_CHANGELOG_REPL_CTXT);
2496 llog_initiator_connect(ctxt);
2497 llog_ctxt_put(ctxt);
2502 static void mdc_llog_finish(struct obd_device *obd)
2504 struct llog_ctxt *ctxt;
2508 ctxt = llog_get_context(obd, LLOG_CHANGELOG_REPL_CTXT);
2510 llog_cleanup(NULL, ctxt);
2515 int mdc_setup(struct obd_device *obd, struct lustre_cfg *cfg)
2521 rc = osc_setup_common(obd, cfg);
2525 #ifdef CONFIG_PROC_FS
2526 obd->obd_vars = lprocfs_mdc_obd_vars;
2527 lprocfs_obd_setup(obd, false);
2528 lprocfs_alloc_md_stats(obd, 0);
2531 sptlrpc_lprocfs_cliobd_attach(obd);
2532 ptlrpc_lprocfs_register_obd(obd);
2534 ns_register_cancel(obd->obd_namespace, mdc_cancel_weight);
2536 obd->obd_namespace->ns_lvbo = &inode_lvbo;
2538 rc = mdc_llog_init(obd);
2540 CERROR("%s: failed to setup llogging subsystems: rc = %d\n",
2542 GOTO(err_llog_cleanup, rc);
2545 rc = mdc_changelog_cdev_init(obd);
2547 CERROR("%s: failed to setup changelog char device: rc = %d\n",
2549 GOTO(err_changelog_cleanup, rc);
2554 err_changelog_cleanup:
2555 mdc_llog_finish(obd);
2557 ptlrpc_lprocfs_unregister_obd(obd);
2558 lprocfs_free_md_stats(obd);
2560 osc_cleanup_common(obd);
2564 /* Initialize the default and maximum LOV EA sizes. This allows
2565 * us to make MDS RPCs with large enough reply buffers to hold a default
2566 * sized EA without having to calculate this (via a call into the
2567 * LOV + OSCs) each time we make an RPC. The maximum size is also tracked
2568 * but not used to avoid wastefully vmalloc()'ing large reply buffers when
2569 * a large number of stripes is possible. If a larger reply buffer is
2570 * required it will be reallocated in the ptlrpc layer due to overflow.
2572 static int mdc_init_ea_size(struct obd_export *exp, __u32 easize,
2575 struct obd_device *obd = exp->exp_obd;
2576 struct client_obd *cli = &obd->u.cli;
2579 if (cli->cl_max_mds_easize < easize)
2580 cli->cl_max_mds_easize = easize;
2582 if (cli->cl_default_mds_easize < def_easize)
2583 cli->cl_default_mds_easize = def_easize;
2588 static int mdc_precleanup(struct obd_device *obd)
2592 osc_precleanup_common(obd);
2594 /* Failsafe, ok if racy */
2595 if (obd->obd_type->typ_refcnt <= 1)
2596 libcfs_kkuc_group_rem(0, KUC_GRP_HSM);
2598 mdc_changelog_cdev_finish(obd);
2600 obd_cleanup_client_import(obd);
2601 ptlrpc_lprocfs_unregister_obd(obd);
2602 lprocfs_free_md_stats(obd);
2603 mdc_llog_finish(obd);
2607 static int mdc_cleanup(struct obd_device *obd)
2609 return osc_cleanup_common(obd);
2612 int mdc_process_config(struct obd_device *obd, size_t len, void *buf)
2614 struct lustre_cfg *lcfg = buf;
2617 rc = class_process_proc_param(PARAM_MDC, obd->obd_vars, lcfg, obd);
2618 return (rc > 0 ? 0: rc);
2621 static struct obd_ops mdc_obd_ops = {
2622 .o_owner = THIS_MODULE,
2623 .o_setup = mdc_setup,
2624 .o_precleanup = mdc_precleanup,
2625 .o_cleanup = mdc_cleanup,
2626 .o_add_conn = client_import_add_conn,
2627 .o_del_conn = client_import_del_conn,
2628 .o_connect = client_connect_import,
2629 .o_reconnect = osc_reconnect,
2630 .o_disconnect = osc_disconnect,
2631 .o_iocontrol = mdc_iocontrol,
2632 .o_set_info_async = mdc_set_info_async,
2633 .o_statfs = mdc_statfs,
2634 .o_fid_init = client_fid_init,
2635 .o_fid_fini = client_fid_fini,
2636 .o_fid_alloc = mdc_fid_alloc,
2637 .o_import_event = mdc_import_event,
2638 .o_get_info = mdc_get_info,
2639 .o_process_config = mdc_process_config,
2640 .o_get_uuid = mdc_get_uuid,
2641 .o_quotactl = mdc_quotactl,
2644 static struct md_ops mdc_md_ops = {
2645 .m_get_root = mdc_get_root,
2646 .m_null_inode = mdc_null_inode,
2647 .m_close = mdc_close,
2648 .m_create = mdc_create,
2649 .m_enqueue = mdc_enqueue,
2650 .m_getattr = mdc_getattr,
2651 .m_getattr_name = mdc_getattr_name,
2652 .m_intent_lock = mdc_intent_lock,
2654 .m_rename = mdc_rename,
2655 .m_setattr = mdc_setattr,
2656 .m_setxattr = mdc_setxattr,
2657 .m_getxattr = mdc_getxattr,
2658 .m_fsync = mdc_fsync,
2659 .m_file_resync = mdc_file_resync,
2660 .m_read_page = mdc_read_page,
2661 .m_unlink = mdc_unlink,
2662 .m_cancel_unused = mdc_cancel_unused,
2663 .m_init_ea_size = mdc_init_ea_size,
2664 .m_set_lock_data = mdc_set_lock_data,
2665 .m_lock_match = mdc_lock_match,
2666 .m_get_lustre_md = mdc_get_lustre_md,
2667 .m_free_lustre_md = mdc_free_lustre_md,
2668 .m_set_open_replay_data = mdc_set_open_replay_data,
2669 .m_clear_open_replay_data = mdc_clear_open_replay_data,
2670 .m_intent_getattr_async = mdc_intent_getattr_async,
2671 .m_revalidate_lock = mdc_revalidate_lock
2674 static int __init mdc_init(void)
2676 return class_register_type(&mdc_obd_ops, &mdc_md_ops, true, NULL,
2677 LUSTRE_MDC_NAME, &mdc_device_type);
2680 static void __exit mdc_exit(void)
2682 class_unregister_type(LUSTRE_MDC_NAME);
2685 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
2686 MODULE_DESCRIPTION("Lustre Metadata Client");
2687 MODULE_VERSION(LUSTRE_VERSION_STRING);
2688 MODULE_LICENSE("GPL");
2690 module_init(mdc_init);
2691 module_exit(mdc_exit);