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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2015, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_MDC
39 #include <linux/init.h>
40 #include <linux/kthread.h>
41 #include <linux/miscdevice.h>
42 #include <linux/module.h>
43 #include <linux/pagemap.h>
44 #include <linux/user_namespace.h>
45 #include <linux/utsname.h>
46 #ifdef HAVE_UIDGID_HEADER
47 # include <linux/uidgid.h>
50 #include <cl_object.h>
51 #include <llog_swab.h>
52 #include <lprocfs_status.h>
53 #include <lustre_acl.h>
54 #include <lustre_fid.h>
55 #include <lustre_ioctl.h>
56 #include <lustre_kernelcomm.h>
57 #include <lustre_lmv.h>
58 #include <lustre_log.h>
59 #include <lustre_param.h>
60 #include <lustre_swab.h>
61 #include <obd_class.h>
63 #include "mdc_internal.h"
65 #define REQUEST_MINOR 244
67 static int mdc_cleanup(struct obd_device *obd);
69 static inline int mdc_queue_wait(struct ptlrpc_request *req)
71 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
74 /* obd_get_request_slot() ensures that this client has no more
75 * than cl_max_rpcs_in_flight RPCs simultaneously inf light
77 rc = obd_get_request_slot(cli);
81 rc = ptlrpc_queue_wait(req);
82 obd_put_request_slot(cli);
88 * Send MDS_GET_ROOT RPC to fetch root FID.
90 * If \a fileset is not NULL it should contain a subdirectory off
91 * the ROOT/ directory to be mounted on the client. Return the FID
92 * of the subdirectory to the client to mount onto its mountpoint.
94 * \param[in] imp MDC import
95 * \param[in] fileset fileset name, which could be NULL
96 * \param[out] rootfid root FID of this mountpoint
97 * \param[out] pc root capa will be unpacked and saved in this pointer
99 * \retval 0 on success, negative errno on failure
101 static int mdc_get_root(struct obd_export *exp, const char *fileset,
102 struct lu_fid *rootfid)
104 struct ptlrpc_request *req;
105 struct mdt_body *body;
110 if (fileset && !(exp_connect_flags(exp) & OBD_CONNECT_SUBTREE))
113 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
119 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
120 strlen(fileset) + 1);
121 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GET_ROOT);
123 ptlrpc_request_free(req);
126 mdc_pack_body(req, NULL, 0, 0, -1, 0);
127 if (fileset != NULL) {
128 char *name = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
130 memcpy(name, fileset, strlen(fileset));
132 lustre_msg_add_flags(req->rq_reqmsg, LUSTRE_IMP_FULL);
133 req->rq_send_state = LUSTRE_IMP_FULL;
135 ptlrpc_request_set_replen(req);
137 rc = ptlrpc_queue_wait(req);
141 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
143 GOTO(out, rc = -EPROTO);
145 *rootfid = body->mbo_fid1;
146 CDEBUG(D_NET, "root fid="DFID", last_committed="LPU64"\n",
147 PFID(rootfid), lustre_msg_get_last_committed(req->rq_repmsg));
150 ptlrpc_req_finished(req);
156 * This function now is known to always saying that it will receive 4 buffers
157 * from server. Even for cases when acl_size and md_size is zero, RPC header
158 * will contain 4 fields and RPC itself will contain zero size fields. This is
159 * because mdt_getattr*() _always_ returns 4 fields, but if acl is not needed
160 * and thus zero, it shrinks it, making zero size. The same story about
161 * md_size. And this is course of problem when client waits for smaller number
162 * of fields. This issue will be fixed later when client gets aware of RPC
165 static int mdc_getattr_common(struct obd_export *exp,
166 struct ptlrpc_request *req)
168 struct req_capsule *pill = &req->rq_pill;
169 struct mdt_body *body;
174 /* Request message already built. */
175 rc = ptlrpc_queue_wait(req);
179 /* sanity check for the reply */
180 body = req_capsule_server_get(pill, &RMF_MDT_BODY);
184 CDEBUG(D_NET, "mode: %o\n", body->mbo_mode);
186 mdc_update_max_ea_from_body(exp, body);
187 if (body->mbo_eadatasize != 0) {
188 eadata = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
189 body->mbo_eadatasize);
197 static int mdc_getattr(struct obd_export *exp, struct md_op_data *op_data,
198 struct ptlrpc_request **request)
200 struct ptlrpc_request *req;
204 /* Single MDS without an LMV case */
205 if (op_data->op_flags & MF_GET_MDT_IDX) {
210 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
214 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
216 ptlrpc_request_free(req);
220 mdc_pack_body(req, &op_data->op_fid1, op_data->op_valid,
221 op_data->op_mode, -1, 0);
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 ptlrpc_request_set_replen(req);
271 rc = mdc_getattr_common(exp, req);
273 ptlrpc_req_finished(req);
279 static int mdc_xattr_common(struct obd_export *exp,const struct req_format *fmt,
280 const struct lu_fid *fid, int opcode, u64 valid,
281 const char *xattr_name, const char *input,
282 int input_size, int output_size, int flags,
283 __u32 suppgid, struct ptlrpc_request **request)
285 struct ptlrpc_request *req;
286 int xattr_namelen = 0;
292 req = ptlrpc_request_alloc(class_exp2cliimp(exp), fmt);
297 xattr_namelen = strlen(xattr_name) + 1;
298 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
303 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
307 /* Flush local XATTR locks to get rid of a possible cancel RPC */
308 if (opcode == MDS_REINT && fid_is_sane(fid) &&
309 exp->exp_connect_data.ocd_ibits_known & MDS_INODELOCK_XATTR) {
310 struct list_head cancels = LIST_HEAD_INIT(cancels);
313 /* Without that packing would fail */
315 req_capsule_set_size(&req->rq_pill, &RMF_EADATA,
318 count = mdc_resource_get_unused(exp, fid,
320 MDS_INODELOCK_XATTR);
322 rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
324 ptlrpc_request_free(req);
328 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, opcode);
330 ptlrpc_request_free(req);
335 if (opcode == MDS_REINT) {
336 struct mdt_rec_setxattr *rec;
338 CLASSERT(sizeof(struct mdt_rec_setxattr) ==
339 sizeof(struct mdt_rec_reint));
340 rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
341 rec->sx_opcode = REINT_SETXATTR;
342 rec->sx_fsuid = from_kuid(&init_user_ns, current_fsuid());
343 rec->sx_fsgid = from_kgid(&init_user_ns, current_fsgid());
344 rec->sx_cap = cfs_curproc_cap_pack();
345 rec->sx_suppgid1 = suppgid;
346 rec->sx_suppgid2 = -1;
348 rec->sx_valid = valid | OBD_MD_FLCTIME;
349 rec->sx_time = cfs_time_current_sec();
350 rec->sx_size = output_size;
351 rec->sx_flags = flags;
353 mdc_pack_body(req, fid, valid, output_size, suppgid, flags);
357 tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
358 memcpy(tmp, xattr_name, xattr_namelen);
361 tmp = req_capsule_client_get(&req->rq_pill, &RMF_EADATA);
362 memcpy(tmp, input, input_size);
365 if (req_capsule_has_field(&req->rq_pill, &RMF_EADATA, RCL_SERVER))
366 req_capsule_set_size(&req->rq_pill, &RMF_EADATA,
367 RCL_SERVER, output_size);
368 ptlrpc_request_set_replen(req);
371 if (opcode == MDS_REINT)
372 mdc_get_mod_rpc_slot(req, NULL);
374 rc = ptlrpc_queue_wait(req);
376 if (opcode == MDS_REINT)
377 mdc_put_mod_rpc_slot(req, NULL);
380 ptlrpc_req_finished(req);
386 static int mdc_setxattr(struct obd_export *exp, const struct lu_fid *fid,
387 u64 valid, const char *xattr_name,
388 const char *input, int input_size, int output_size,
389 int flags, __u32 suppgid,
390 struct ptlrpc_request **request)
392 return mdc_xattr_common(exp, &RQF_MDS_REINT_SETXATTR,
393 fid, MDS_REINT, valid, xattr_name,
394 input, input_size, output_size, flags,
398 static int mdc_getxattr(struct obd_export *exp, const struct lu_fid *fid,
399 u64 valid, const char *xattr_name,
400 const char *input, int input_size, int output_size,
401 int flags, struct ptlrpc_request **request)
403 return mdc_xattr_common(exp, &RQF_MDS_GETXATTR,
404 fid, MDS_GETXATTR, valid, xattr_name,
405 input, input_size, output_size, flags,
409 #ifdef CONFIG_FS_POSIX_ACL
410 static int mdc_unpack_acl(struct ptlrpc_request *req, struct lustre_md *md)
412 struct req_capsule *pill = &req->rq_pill;
413 struct mdt_body *body = md->body;
414 struct posix_acl *acl;
419 if (!body->mbo_aclsize)
422 buf = req_capsule_server_sized_get(pill, &RMF_ACL, body->mbo_aclsize);
427 acl = posix_acl_from_xattr(&init_user_ns, buf, body->mbo_aclsize);
432 CERROR("convert xattr to acl: %d\n", rc);
436 rc = posix_acl_valid(acl);
438 CERROR("validate acl: %d\n", rc);
439 posix_acl_release(acl);
447 #define mdc_unpack_acl(req, md) 0
450 int mdc_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
451 struct obd_export *dt_exp, struct obd_export *md_exp,
452 struct lustre_md *md)
454 struct req_capsule *pill = &req->rq_pill;
459 memset(md, 0, sizeof(*md));
461 md->body = req_capsule_server_get(pill, &RMF_MDT_BODY);
462 LASSERT(md->body != NULL);
464 if (md->body->mbo_valid & OBD_MD_FLEASIZE) {
465 if (!S_ISREG(md->body->mbo_mode)) {
466 CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, should be a "
467 "regular file, but is not\n");
468 GOTO(out, rc = -EPROTO);
471 if (md->body->mbo_eadatasize == 0) {
472 CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, "
473 "but eadatasize 0\n");
474 GOTO(out, rc = -EPROTO);
477 md->layout.lb_len = md->body->mbo_eadatasize;
478 md->layout.lb_buf = req_capsule_server_sized_get(pill,
481 if (md->layout.lb_buf == NULL)
482 GOTO(out, rc = -EPROTO);
483 } else if (md->body->mbo_valid & OBD_MD_FLDIREA) {
484 const union lmv_mds_md *lmv;
487 if (!S_ISDIR(md->body->mbo_mode)) {
488 CDEBUG(D_INFO, "OBD_MD_FLDIREA set, should be a "
489 "directory, but is not\n");
490 GOTO(out, rc = -EPROTO);
493 lmv_size = md->body->mbo_eadatasize;
495 CDEBUG(D_INFO, "OBD_MD_FLDIREA is set, "
496 "but eadatasize 0\n");
500 if (md->body->mbo_valid & OBD_MD_MEA) {
501 lmv = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
504 GOTO(out, rc = -EPROTO);
506 rc = md_unpackmd(md_exp, &md->lmv, lmv, lmv_size);
510 if (rc < (typeof(rc))sizeof(*md->lmv)) {
511 CDEBUG(D_INFO, "size too small: "
512 "rc < sizeof(*md->lmv) (%d < %d)\n",
513 rc, (int)sizeof(*md->lmv));
514 GOTO(out, rc = -EPROTO);
520 if (md->body->mbo_valid & OBD_MD_FLACL) {
521 /* for ACL, it's possible that FLACL is set but aclsize is zero.
522 * only when aclsize != 0 there's an actual segment for ACL
525 if (md->body->mbo_aclsize) {
526 rc = mdc_unpack_acl(req, md);
529 #ifdef CONFIG_FS_POSIX_ACL
531 md->posix_acl = NULL;
539 #ifdef CONFIG_FS_POSIX_ACL
540 posix_acl_release(md->posix_acl);
546 int mdc_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
552 void mdc_replay_open(struct ptlrpc_request *req)
554 struct md_open_data *mod = req->rq_cb_data;
555 struct ptlrpc_request *close_req;
556 struct obd_client_handle *och;
557 struct lustre_handle old;
558 struct mdt_body *body;
562 DEBUG_REQ(D_ERROR, req,
563 "Can't properly replay without open data.");
568 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
569 LASSERT(body != NULL);
573 struct lustre_handle *file_fh;
575 LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
577 file_fh = &och->och_fh;
578 CDEBUG(D_HA, "updating handle from "LPX64" to "LPX64"\n",
579 file_fh->cookie, body->mbo_handle.cookie);
581 *file_fh = body->mbo_handle;
583 close_req = mod->mod_close_req;
584 if (close_req != NULL) {
585 __u32 opc = lustre_msg_get_opc(close_req->rq_reqmsg);
586 struct mdt_ioepoch *epoch;
588 LASSERT(opc == MDS_CLOSE);
589 epoch = req_capsule_client_get(&close_req->rq_pill,
594 LASSERT(!memcmp(&old, &epoch->mio_handle, sizeof(old)));
596 DEBUG_REQ(D_HA, close_req, "updating close body with new fh");
597 epoch->mio_handle = body->mbo_handle;
602 void mdc_commit_open(struct ptlrpc_request *req)
604 struct md_open_data *mod = req->rq_cb_data;
609 * No need to touch md_open_data::mod_och, it holds a reference on
610 * \var mod and will zero references to each other, \var mod will be
611 * freed after that when md_open_data::mod_och will put the reference.
615 * Do not let open request to disappear as it still may be needed
616 * for close rpc to happen (it may happen on evict only, otherwise
617 * ptlrpc_request::rq_replay does not let mdc_commit_open() to be
618 * called), just mark this rpc as committed to distinguish these 2
619 * cases, see mdc_close() for details. The open request reference will
620 * be put along with freeing \var mod.
622 ptlrpc_request_addref(req);
623 spin_lock(&req->rq_lock);
624 req->rq_committed = 1;
625 spin_unlock(&req->rq_lock);
626 req->rq_cb_data = NULL;
630 int mdc_set_open_replay_data(struct obd_export *exp,
631 struct obd_client_handle *och,
632 struct lookup_intent *it)
634 struct md_open_data *mod;
635 struct mdt_rec_create *rec;
636 struct mdt_body *body;
637 struct ptlrpc_request *open_req = it->it_request;
638 struct obd_import *imp = open_req->rq_import;
641 if (!open_req->rq_replay)
644 rec = req_capsule_client_get(&open_req->rq_pill, &RMF_REC_REINT);
645 body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
646 LASSERT(rec != NULL);
647 /* Incoming message in my byte order (it's been swabbed). */
648 /* Outgoing messages always in my byte order. */
649 LASSERT(body != NULL);
651 /* Only if the import is replayable, we set replay_open data */
652 if (och && imp->imp_replayable) {
653 mod = obd_mod_alloc();
655 DEBUG_REQ(D_ERROR, open_req,
656 "Can't allocate md_open_data");
661 * Take a reference on \var mod, to be freed on mdc_close().
662 * It protects \var mod from being freed on eviction (commit
663 * callback is called despite rq_replay flag).
664 * Another reference for \var och.
669 spin_lock(&open_req->rq_lock);
672 mod->mod_is_create = it_disposition(it, DISP_OPEN_CREATE) ||
673 it_disposition(it, DISP_OPEN_STRIPE);
674 mod->mod_open_req = open_req;
675 open_req->rq_cb_data = mod;
676 open_req->rq_commit_cb = mdc_commit_open;
677 spin_unlock(&open_req->rq_lock);
680 rec->cr_fid2 = body->mbo_fid1;
681 rec->cr_ioepoch = body->mbo_ioepoch;
682 rec->cr_old_handle.cookie = body->mbo_handle.cookie;
683 open_req->rq_replay_cb = mdc_replay_open;
684 if (!fid_is_sane(&body->mbo_fid1)) {
685 DEBUG_REQ(D_ERROR, open_req, "Saving replay request with "
690 DEBUG_REQ(D_RPCTRACE, open_req, "Set up open replay data");
694 static void mdc_free_open(struct md_open_data *mod)
698 if (mod->mod_is_create == 0 &&
699 imp_connect_disp_stripe(mod->mod_open_req->rq_import))
702 LASSERT(mod->mod_open_req->rq_replay == 0);
704 DEBUG_REQ(D_RPCTRACE, mod->mod_open_req, "free open request\n");
706 ptlrpc_request_committed(mod->mod_open_req, committed);
707 if (mod->mod_close_req)
708 ptlrpc_request_committed(mod->mod_close_req, committed);
711 int mdc_clear_open_replay_data(struct obd_export *exp,
712 struct obd_client_handle *och)
714 struct md_open_data *mod = och->och_mod;
718 * It is possible to not have \var mod in a case of eviction between
719 * lookup and ll_file_open().
724 LASSERT(mod != LP_POISON);
725 LASSERT(mod->mod_open_req != NULL);
735 static int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
736 struct md_open_data *mod, struct ptlrpc_request **request)
738 struct obd_device *obd = class_exp2obd(exp);
739 struct ptlrpc_request *req;
740 struct req_format *req_fmt;
745 if (op_data->op_bias & MDS_HSM_RELEASE) {
746 req_fmt = &RQF_MDS_INTENT_CLOSE;
748 /* allocate a FID for volatile file */
749 rc = mdc_fid_alloc(NULL, exp, &op_data->op_fid2, op_data);
751 CERROR("%s: "DFID" failed to allocate FID: %d\n",
752 obd->obd_name, PFID(&op_data->op_fid1), rc);
753 /* save the errcode and proceed to close */
756 } else if (op_data->op_bias & MDS_CLOSE_LAYOUT_SWAP) {
757 req_fmt = &RQF_MDS_INTENT_CLOSE;
759 req_fmt = &RQF_MDS_CLOSE;
763 req = ptlrpc_request_alloc(class_exp2cliimp(exp), req_fmt);
767 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_CLOSE);
769 ptlrpc_request_free(req);
773 /* To avoid a livelock (bug 7034), we need to send CLOSE RPCs to a
774 * portal whose threads are not taking any DLM locks and are therefore
775 * always progressing */
776 req->rq_request_portal = MDS_READPAGE_PORTAL;
777 ptlrpc_at_set_req_timeout(req);
779 /* Ensure that this close's handle is fixed up during replay. */
780 if (likely(mod != NULL)) {
781 LASSERTF(mod->mod_open_req != NULL &&
782 mod->mod_open_req->rq_type != LI_POISON,
783 "POISONED open %p!\n", mod->mod_open_req);
785 mod->mod_close_req = req;
787 DEBUG_REQ(D_HA, mod->mod_open_req, "matched open");
788 /* We no longer want to preserve this open for replay even
789 * though the open was committed. b=3632, b=3633 */
790 spin_lock(&mod->mod_open_req->rq_lock);
791 mod->mod_open_req->rq_replay = 0;
792 spin_unlock(&mod->mod_open_req->rq_lock);
794 CDEBUG(D_HA, "couldn't find open req; expecting close error\n");
797 mdc_close_pack(req, op_data);
799 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
800 obd->u.cli.cl_default_mds_easize);
802 ptlrpc_request_set_replen(req);
804 mdc_get_mod_rpc_slot(req, NULL);
805 rc = ptlrpc_queue_wait(req);
806 mdc_put_mod_rpc_slot(req, NULL);
808 if (req->rq_repmsg == NULL) {
809 CDEBUG(D_RPCTRACE, "request failed to send: %p, %d\n", req,
812 rc = req->rq_status ?: -EIO;
813 } else if (rc == 0 || rc == -EAGAIN) {
814 struct mdt_body *body;
816 rc = lustre_msg_get_status(req->rq_repmsg);
817 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
818 DEBUG_REQ(D_ERROR, req, "type == PTL_RPC_MSG_ERR, err "
823 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
826 } else if (rc == -ESTALE) {
828 * it can be allowed error after 3633 if open was committed and
829 * server failed before close was sent. Let's check if mod
830 * exists and return no error in that case
833 DEBUG_REQ(D_HA, req, "Reset ESTALE = %d", rc);
834 LASSERT(mod->mod_open_req != NULL);
835 if (mod->mod_open_req->rq_committed)
842 mod->mod_close_req = NULL;
843 /* Since now, mod is accessed through open_req only,
844 * thus close req does not keep a reference on mod anymore. */
849 RETURN(rc < 0 ? rc : saved_rc);
852 static int mdc_getpage(struct obd_export *exp, const struct lu_fid *fid,
853 u64 offset, struct page **pages, int npages,
854 struct ptlrpc_request **request)
856 struct ptlrpc_request *req;
857 struct ptlrpc_bulk_desc *desc;
859 wait_queue_head_t waitq;
861 struct l_wait_info lwi;
866 init_waitqueue_head(&waitq);
869 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_READPAGE);
873 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_READPAGE);
875 ptlrpc_request_free(req);
879 req->rq_request_portal = MDS_READPAGE_PORTAL;
880 ptlrpc_at_set_req_timeout(req);
882 desc = ptlrpc_prep_bulk_imp(req, npages, 1,
883 PTLRPC_BULK_PUT_SINK | PTLRPC_BULK_BUF_KIOV,
885 &ptlrpc_bulk_kiov_pin_ops);
887 ptlrpc_request_free(req);
891 /* NB req now owns desc and will free it when it gets freed */
892 for (i = 0; i < npages; i++)
893 desc->bd_frag_ops->add_kiov_frag(desc, pages[i], 0,
896 mdc_readdir_pack(req, offset, PAGE_CACHE_SIZE * npages, fid);
898 ptlrpc_request_set_replen(req);
899 rc = ptlrpc_queue_wait(req);
901 ptlrpc_req_finished(req);
902 if (rc != -ETIMEDOUT)
906 if (!client_should_resend(resends, &exp->exp_obd->u.cli)) {
907 CERROR("%s: too many resend retries: rc = %d\n",
908 exp->exp_obd->obd_name, -EIO);
911 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends), NULL, NULL,
913 l_wait_event(waitq, 0, &lwi);
918 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk,
919 req->rq_bulk->bd_nob_transferred);
921 ptlrpc_req_finished(req);
925 if (req->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK) {
926 CERROR("%s: unexpected bytes transferred: %d (%ld expected)\n",
927 exp->exp_obd->obd_name, req->rq_bulk->bd_nob_transferred,
928 PAGE_CACHE_SIZE * npages);
929 ptlrpc_req_finished(req);
937 static void mdc_release_page(struct page *page, int remove)
941 if (likely(page->mapping != NULL))
942 truncate_complete_page(page->mapping, page);
945 page_cache_release(page);
948 static struct page *mdc_page_locate(struct address_space *mapping, __u64 *hash,
949 __u64 *start, __u64 *end, int hash64)
952 * Complement of hash is used as an index so that
953 * radix_tree_gang_lookup() can be used to find a page with starting
954 * hash _smaller_ than one we are looking for.
956 unsigned long offset = hash_x_index(*hash, hash64);
960 spin_lock_irq(&mapping->tree_lock);
961 found = radix_tree_gang_lookup(&mapping->page_tree,
962 (void **)&page, offset, 1);
963 if (found > 0 && !radix_tree_exceptional_entry(page)) {
964 struct lu_dirpage *dp;
966 page_cache_get(page);
967 spin_unlock_irq(&mapping->tree_lock);
969 * In contrast to find_lock_page() we are sure that directory
970 * page cannot be truncated (while DLM lock is held) and,
971 * hence, can avoid restart.
973 * In fact, page cannot be locked here at all, because
974 * mdc_read_page_remote does synchronous io.
976 wait_on_page_locked(page);
977 if (PageUptodate(page)) {
979 if (BITS_PER_LONG == 32 && hash64) {
980 *start = le64_to_cpu(dp->ldp_hash_start) >> 32;
981 *end = le64_to_cpu(dp->ldp_hash_end) >> 32;
984 *start = le64_to_cpu(dp->ldp_hash_start);
985 *end = le64_to_cpu(dp->ldp_hash_end);
987 if (unlikely(*start == 1 && *hash == 0))
990 LASSERTF(*start <= *hash, "start = "LPX64
991 ",end = "LPX64",hash = "LPX64"\n",
992 *start, *end, *hash);
993 CDEBUG(D_VFSTRACE, "offset %lx ["LPX64" "LPX64"],"
994 " hash "LPX64"\n", offset, *start, *end, *hash);
997 mdc_release_page(page, 0);
999 } else if (*end != *start && *hash == *end) {
1001 * upon hash collision, remove this page,
1002 * otherwise put page reference, and
1003 * mdc_read_page_remote() will issue RPC to
1004 * fetch the page we want.
1007 mdc_release_page(page,
1008 le32_to_cpu(dp->ldp_flags) & LDF_COLLIDE);
1012 page_cache_release(page);
1013 page = ERR_PTR(-EIO);
1016 spin_unlock_irq(&mapping->tree_lock);
1023 * Adjust a set of pages, each page containing an array of lu_dirpages,
1024 * so that each page can be used as a single logical lu_dirpage.
1026 * A lu_dirpage is laid out as follows, where s = ldp_hash_start,
1027 * e = ldp_hash_end, f = ldp_flags, p = padding, and each "ent" is a
1028 * struct lu_dirent. It has size up to LU_PAGE_SIZE. The ldp_hash_end
1029 * value is used as a cookie to request the next lu_dirpage in a
1030 * directory listing that spans multiple pages (two in this example):
1033 * .|--------v------- -----.
1034 * |s|e|f|p|ent|ent| ... |ent|
1035 * '--|-------------- -----' Each PAGE contains a single
1036 * '------. lu_dirpage.
1037 * .---------v------- -----.
1038 * |s|e|f|p|ent| 0 | ... | 0 |
1039 * '----------------- -----'
1041 * However, on hosts where the native VM page size (PAGE_CACHE_SIZE) is
1042 * larger than LU_PAGE_SIZE, a single host page may contain multiple
1043 * lu_dirpages. After reading the lu_dirpages from the MDS, the
1044 * ldp_hash_end of the first lu_dirpage refers to the one immediately
1045 * after it in the same PAGE (arrows simplified for brevity, but
1046 * in general e0==s1, e1==s2, etc.):
1048 * .-------------------- -----.
1049 * |s0|e0|f0|p|ent|ent| ... |ent|
1050 * |---v---------------- -----|
1051 * |s1|e1|f1|p|ent|ent| ... |ent|
1052 * |---v---------------- -----| Here, each PAGE contains
1053 * ... multiple lu_dirpages.
1054 * |---v---------------- -----|
1055 * |s'|e'|f'|p|ent|ent| ... |ent|
1056 * '---|---------------- -----'
1058 * .----------------------------.
1061 * This structure is transformed into a single logical lu_dirpage as follows:
1063 * - Replace e0 with e' so the request for the next lu_dirpage gets the page
1064 * labeled 'next PAGE'.
1066 * - Copy the LDF_COLLIDE flag from f' to f0 to correctly reflect whether
1067 * a hash collision with the next page exists.
1069 * - Adjust the lde_reclen of the ending entry of each lu_dirpage to span
1070 * to the first entry of the next lu_dirpage.
1072 #if PAGE_CACHE_SIZE > LU_PAGE_SIZE
1073 static void mdc_adjust_dirpages(struct page **pages, int cfs_pgs, int lu_pgs)
1077 for (i = 0; i < cfs_pgs; i++) {
1078 struct lu_dirpage *dp = kmap(pages[i]);
1079 struct lu_dirpage *first = dp;
1080 struct lu_dirent *end_dirent = NULL;
1081 struct lu_dirent *ent;
1082 __u64 hash_end = le64_to_cpu(dp->ldp_hash_end);
1083 __u32 flags = le32_to_cpu(dp->ldp_flags);
1085 while (--lu_pgs > 0) {
1086 ent = lu_dirent_start(dp);
1087 for (end_dirent = ent; ent != NULL;
1088 end_dirent = ent, ent = lu_dirent_next(ent));
1090 /* Advance dp to next lu_dirpage. */
1091 dp = (struct lu_dirpage *)((char *)dp + LU_PAGE_SIZE);
1093 /* Check if we've reached the end of the PAGE. */
1094 if (!((unsigned long)dp & ~PAGE_MASK))
1097 /* Save the hash and flags of this lu_dirpage. */
1098 hash_end = le64_to_cpu(dp->ldp_hash_end);
1099 flags = le32_to_cpu(dp->ldp_flags);
1101 /* Check if lu_dirpage contains no entries. */
1102 if (end_dirent == NULL)
1105 /* Enlarge the end entry lde_reclen from 0 to
1106 * first entry of next lu_dirpage. */
1107 LASSERT(le16_to_cpu(end_dirent->lde_reclen) == 0);
1108 end_dirent->lde_reclen =
1109 cpu_to_le16((char *)(dp->ldp_entries) -
1110 (char *)end_dirent);
1113 first->ldp_hash_end = hash_end;
1114 first->ldp_flags &= ~cpu_to_le32(LDF_COLLIDE);
1115 first->ldp_flags |= flags & cpu_to_le32(LDF_COLLIDE);
1119 LASSERTF(lu_pgs == 0, "left = %d\n", lu_pgs);
1122 #define mdc_adjust_dirpages(pages, cfs_pgs, lu_pgs) do {} while (0)
1123 #endif /* PAGE_CACHE_SIZE > LU_PAGE_SIZE */
1125 /* parameters for readdir page */
1126 struct readpage_param {
1127 struct md_op_data *rp_mod;
1130 struct obd_export *rp_exp;
1131 struct md_callback *rp_cb;
1134 #ifndef HAVE_DELETE_FROM_PAGE_CACHE
1135 static inline void delete_from_page_cache(struct page *page)
1137 remove_from_page_cache(page);
1138 page_cache_release(page);
1143 * Read pages from server.
1145 * Page in MDS_READPAGE RPC is packed in LU_PAGE_SIZE, and each page contains
1146 * a header lu_dirpage which describes the start/end hash, and whether this
1147 * page is empty (contains no dir entry) or hash collide with next page.
1148 * After client receives reply, several pages will be integrated into dir page
1149 * in PAGE_SIZE (if PAGE_SIZE greater than LU_PAGE_SIZE), and the
1150 * lu_dirpage for this integrated page will be adjusted.
1152 static int mdc_read_page_remote(void *data, struct page *page0)
1154 struct readpage_param *rp = data;
1155 struct page **page_pool;
1157 struct lu_dirpage *dp;
1158 int rd_pgs = 0; /* number of pages read actually */
1160 struct md_op_data *op_data = rp->rp_mod;
1161 struct ptlrpc_request *req;
1162 int max_pages = op_data->op_max_pages;
1163 struct inode *inode;
1169 LASSERT(max_pages > 0 && max_pages <= PTLRPC_MAX_BRW_PAGES);
1170 inode = op_data->op_data;
1171 fid = &op_data->op_fid1;
1172 LASSERT(inode != NULL);
1174 OBD_ALLOC(page_pool, sizeof(page_pool[0]) * max_pages);
1175 if (page_pool != NULL) {
1176 page_pool[0] = page0;
1182 for (npages = 1; npages < max_pages; npages++) {
1183 page = page_cache_alloc_cold(inode->i_mapping);
1186 page_pool[npages] = page;
1189 rc = mdc_getpage(rp->rp_exp, fid, rp->rp_off, page_pool, npages, &req);
1191 /* page0 is special, which was added into page cache early */
1192 delete_from_page_cache(page0);
1196 rd_pgs = (req->rq_bulk->bd_nob_transferred +
1197 PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
1198 lu_pgs = req->rq_bulk->bd_nob_transferred >>
1200 LASSERT(!(req->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK));
1202 CDEBUG(D_INODE, "read %d(%d) pages\n", rd_pgs, lu_pgs);
1204 mdc_adjust_dirpages(page_pool, rd_pgs, lu_pgs);
1206 SetPageUptodate(page0);
1210 ptlrpc_req_finished(req);
1211 CDEBUG(D_CACHE, "read %d/%d pages\n", rd_pgs, npages);
1212 for (i = 1; i < npages; i++) {
1213 unsigned long offset;
1217 page = page_pool[i];
1219 if (rc < 0 || i >= rd_pgs) {
1220 page_cache_release(page);
1224 SetPageUptodate(page);
1227 hash = le64_to_cpu(dp->ldp_hash_start);
1230 offset = hash_x_index(hash, rp->rp_hash64);
1232 prefetchw(&page->flags);
1233 ret = add_to_page_cache_lru(page, inode->i_mapping, offset,
1238 CDEBUG(D_VFSTRACE, "page %lu add to page cache failed:"
1239 " rc = %d\n", offset, ret);
1240 page_cache_release(page);
1243 if (page_pool != &page0)
1244 OBD_FREE(page_pool, sizeof(page_pool[0]) * max_pages);
1250 * Read dir page from cache first, if it can not find it, read it from
1251 * server and add into the cache.
1253 * \param[in] exp MDC export
1254 * \param[in] op_data client MD stack parameters, transfering parameters
1255 * between different layers on client MD stack.
1256 * \param[in] cb_op callback required for ldlm lock enqueue during
1258 * \param[in] hash_offset the hash offset of the page to be read
1259 * \param[in] ppage the page to be read
1261 * retval = 0 get the page successfully
1262 * errno(<0) get the page failed
1264 static int mdc_read_page(struct obd_export *exp, struct md_op_data *op_data,
1265 struct md_callback *cb_op, __u64 hash_offset,
1266 struct page **ppage)
1268 struct lookup_intent it = { .it_op = IT_READDIR };
1270 struct inode *dir = op_data->op_data;
1271 struct address_space *mapping;
1272 struct lu_dirpage *dp;
1275 struct lustre_handle lockh;
1276 struct ptlrpc_request *enq_req = NULL;
1277 struct readpage_param rp_param;
1284 LASSERT(dir != NULL);
1285 mapping = dir->i_mapping;
1287 rc = mdc_intent_lock(exp, op_data, &it, &enq_req,
1288 cb_op->md_blocking_ast, 0);
1289 if (enq_req != NULL)
1290 ptlrpc_req_finished(enq_req);
1293 CERROR("%s: "DFID" lock enqueue fails: rc = %d\n",
1294 exp->exp_obd->obd_name, PFID(&op_data->op_fid1), rc);
1299 lockh.cookie = it.it_lock_handle;
1300 mdc_set_lock_data(exp, &lockh, dir, NULL);
1302 rp_param.rp_off = hash_offset;
1303 rp_param.rp_hash64 = op_data->op_cli_flags & CLI_HASH64;
1304 page = mdc_page_locate(mapping, &rp_param.rp_off, &start, &end,
1305 rp_param.rp_hash64);
1307 CERROR("%s: dir page locate: "DFID" at "LPU64": rc %ld\n",
1308 exp->exp_obd->obd_name, PFID(&op_data->op_fid1),
1309 rp_param.rp_off, PTR_ERR(page));
1310 GOTO(out_unlock, rc = PTR_ERR(page));
1311 } else if (page != NULL) {
1313 * XXX nikita: not entirely correct handling of a corner case:
1314 * suppose hash chain of entries with hash value HASH crosses
1315 * border between pages P0 and P1. First both P0 and P1 are
1316 * cached, seekdir() is called for some entry from the P0 part
1317 * of the chain. Later P0 goes out of cache. telldir(HASH)
1318 * happens and finds P1, as it starts with matching hash
1319 * value. Remaining entries from P0 part of the chain are
1320 * skipped. (Is that really a bug?)
1322 * Possible solutions: 0. don't cache P1 is such case, handle
1323 * it as an "overflow" page. 1. invalidate all pages at
1324 * once. 2. use HASH|1 as an index for P1.
1326 GOTO(hash_collision, page);
1329 rp_param.rp_exp = exp;
1330 rp_param.rp_mod = op_data;
1331 page = read_cache_page(mapping,
1332 hash_x_index(rp_param.rp_off,
1333 rp_param.rp_hash64),
1334 mdc_read_page_remote, &rp_param);
1336 CDEBUG(D_INFO, "%s: read cache page: "DFID" at "LPU64": %ld\n",
1337 exp->exp_obd->obd_name, PFID(&op_data->op_fid1),
1338 rp_param.rp_off, PTR_ERR(page));
1339 GOTO(out_unlock, rc = PTR_ERR(page));
1342 wait_on_page_locked(page);
1344 if (!PageUptodate(page)) {
1345 CERROR("%s: page not updated: "DFID" at "LPU64": rc %d\n",
1346 exp->exp_obd->obd_name, PFID(&op_data->op_fid1),
1347 rp_param.rp_off, -5);
1350 if (!PageChecked(page))
1351 SetPageChecked(page);
1352 if (PageError(page)) {
1353 CERROR("%s: page error: "DFID" at "LPU64": rc %d\n",
1354 exp->exp_obd->obd_name, PFID(&op_data->op_fid1),
1355 rp_param.rp_off, -5);
1360 dp = page_address(page);
1361 if (BITS_PER_LONG == 32 && rp_param.rp_hash64) {
1362 start = le64_to_cpu(dp->ldp_hash_start) >> 32;
1363 end = le64_to_cpu(dp->ldp_hash_end) >> 32;
1364 rp_param.rp_off = hash_offset >> 32;
1366 start = le64_to_cpu(dp->ldp_hash_start);
1367 end = le64_to_cpu(dp->ldp_hash_end);
1368 rp_param.rp_off = hash_offset;
1371 LASSERT(start == rp_param.rp_off);
1372 CWARN("Page-wide hash collision: %#lx\n", (unsigned long)end);
1373 #if BITS_PER_LONG == 32
1374 CWARN("Real page-wide hash collision at ["LPU64" "LPU64"] with "
1375 "hash "LPU64"\n", le64_to_cpu(dp->ldp_hash_start),
1376 le64_to_cpu(dp->ldp_hash_end), hash_offset);
1380 * Fetch whole overflow chain...
1388 ldlm_lock_decref(&lockh, it.it_lock_mode);
1392 mdc_release_page(page, 1);
1398 static int mdc_statfs(const struct lu_env *env,
1399 struct obd_export *exp, struct obd_statfs *osfs,
1400 __u64 max_age, __u32 flags)
1402 struct obd_device *obd = class_exp2obd(exp);
1403 struct ptlrpc_request *req;
1404 struct obd_statfs *msfs;
1405 struct obd_import *imp = NULL;
1410 * Since the request might also come from lprocfs, so we need
1411 * sync this with client_disconnect_export Bug15684
1413 down_read(&obd->u.cli.cl_sem);
1414 if (obd->u.cli.cl_import)
1415 imp = class_import_get(obd->u.cli.cl_import);
1416 up_read(&obd->u.cli.cl_sem);
1420 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_STATFS,
1421 LUSTRE_MDS_VERSION, MDS_STATFS);
1423 GOTO(output, rc = -ENOMEM);
1425 ptlrpc_request_set_replen(req);
1427 if (flags & OBD_STATFS_NODELAY) {
1428 /* procfs requests not want stay in wait for avoid deadlock */
1429 req->rq_no_resend = 1;
1430 req->rq_no_delay = 1;
1433 rc = ptlrpc_queue_wait(req);
1435 /* check connection error first */
1436 if (imp->imp_connect_error)
1437 rc = imp->imp_connect_error;
1441 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
1443 GOTO(out, rc = -EPROTO);
1448 ptlrpc_req_finished(req);
1450 class_import_put(imp);
1454 static int mdc_ioc_fid2path(struct obd_export *exp, struct getinfo_fid2path *gf)
1456 __u32 keylen, vallen;
1460 if (gf->gf_pathlen > PATH_MAX)
1461 RETURN(-ENAMETOOLONG);
1462 if (gf->gf_pathlen < 2)
1465 /* Key is KEY_FID2PATH + getinfo_fid2path description */
1466 keylen = cfs_size_round(sizeof(KEY_FID2PATH) + sizeof(*gf) +
1467 sizeof(struct lu_fid));
1468 OBD_ALLOC(key, keylen);
1471 memcpy(key, KEY_FID2PATH, sizeof(KEY_FID2PATH));
1472 memcpy(key + cfs_size_round(sizeof(KEY_FID2PATH)), gf, sizeof(*gf));
1473 memcpy(key + cfs_size_round(sizeof(KEY_FID2PATH)) + sizeof(*gf),
1474 gf->gf_u.gf_root_fid, sizeof(struct lu_fid));
1475 CDEBUG(D_IOCTL, "path get "DFID" from "LPU64" #%d\n",
1476 PFID(&gf->gf_fid), gf->gf_recno, gf->gf_linkno);
1478 if (!fid_is_sane(&gf->gf_fid))
1479 GOTO(out, rc = -EINVAL);
1481 /* Val is struct getinfo_fid2path result plus path */
1482 vallen = sizeof(*gf) + gf->gf_pathlen;
1484 rc = obd_get_info(NULL, exp, keylen, key, &vallen, gf);
1485 if (rc != 0 && rc != -EREMOTE)
1488 if (vallen <= sizeof(*gf))
1489 GOTO(out, rc = -EPROTO);
1490 if (vallen > sizeof(*gf) + gf->gf_pathlen)
1491 GOTO(out, rc = -EOVERFLOW);
1493 CDEBUG(D_IOCTL, "path got "DFID" from "LPU64" #%d: %s\n",
1494 PFID(&gf->gf_fid), gf->gf_recno, gf->gf_linkno,
1495 gf->gf_pathlen < 512 ? gf->gf_u.gf_path :
1496 /* only log the last 512 characters of the path */
1497 gf->gf_u.gf_path + gf->gf_pathlen - 512);
1500 OBD_FREE(key, keylen);
1504 static int mdc_ioc_hsm_progress(struct obd_export *exp,
1505 struct hsm_progress_kernel *hpk)
1507 struct obd_import *imp = class_exp2cliimp(exp);
1508 struct hsm_progress_kernel *req_hpk;
1509 struct ptlrpc_request *req;
1513 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_PROGRESS,
1514 LUSTRE_MDS_VERSION, MDS_HSM_PROGRESS);
1516 GOTO(out, rc = -ENOMEM);
1518 mdc_pack_body(req, NULL, 0, 0, -1, 0);
1520 /* Copy hsm_progress struct */
1521 req_hpk = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_PROGRESS);
1522 if (req_hpk == NULL)
1523 GOTO(out, rc = -EPROTO);
1526 req_hpk->hpk_errval = lustre_errno_hton(hpk->hpk_errval);
1528 ptlrpc_request_set_replen(req);
1530 mdc_get_mod_rpc_slot(req, NULL);
1531 rc = ptlrpc_queue_wait(req);
1532 mdc_put_mod_rpc_slot(req, NULL);
1536 ptlrpc_req_finished(req);
1540 static int mdc_ioc_hsm_ct_register(struct obd_import *imp, __u32 archives)
1542 __u32 *archive_mask;
1543 struct ptlrpc_request *req;
1547 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_CT_REGISTER,
1549 MDS_HSM_CT_REGISTER);
1551 GOTO(out, rc = -ENOMEM);
1553 mdc_pack_body(req, NULL, 0, 0, -1, 0);
1555 /* Copy hsm_progress struct */
1556 archive_mask = req_capsule_client_get(&req->rq_pill,
1557 &RMF_MDS_HSM_ARCHIVE);
1558 if (archive_mask == NULL)
1559 GOTO(out, rc = -EPROTO);
1561 *archive_mask = archives;
1563 ptlrpc_request_set_replen(req);
1565 rc = mdc_queue_wait(req);
1568 ptlrpc_req_finished(req);
1572 static int mdc_ioc_hsm_current_action(struct obd_export *exp,
1573 struct md_op_data *op_data)
1575 struct hsm_current_action *hca = op_data->op_data;
1576 struct hsm_current_action *req_hca;
1577 struct ptlrpc_request *req;
1581 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
1582 &RQF_MDS_HSM_ACTION);
1586 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_ACTION);
1588 ptlrpc_request_free(req);
1592 mdc_pack_body(req, &op_data->op_fid1, 0, 0,
1593 op_data->op_suppgids[0], 0);
1595 ptlrpc_request_set_replen(req);
1597 rc = mdc_queue_wait(req);
1601 req_hca = req_capsule_server_get(&req->rq_pill,
1602 &RMF_MDS_HSM_CURRENT_ACTION);
1603 if (req_hca == NULL)
1604 GOTO(out, rc = -EPROTO);
1610 ptlrpc_req_finished(req);
1614 static int mdc_ioc_hsm_ct_unregister(struct obd_import *imp)
1616 struct ptlrpc_request *req;
1620 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_CT_UNREGISTER,
1622 MDS_HSM_CT_UNREGISTER);
1624 GOTO(out, rc = -ENOMEM);
1626 mdc_pack_body(req, NULL, 0, 0, -1, 0);
1628 ptlrpc_request_set_replen(req);
1630 rc = mdc_queue_wait(req);
1633 ptlrpc_req_finished(req);
1637 static int mdc_ioc_hsm_state_get(struct obd_export *exp,
1638 struct md_op_data *op_data)
1640 struct hsm_user_state *hus = op_data->op_data;
1641 struct hsm_user_state *req_hus;
1642 struct ptlrpc_request *req;
1646 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
1647 &RQF_MDS_HSM_STATE_GET);
1651 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_STATE_GET);
1653 ptlrpc_request_free(req);
1657 mdc_pack_body(req, &op_data->op_fid1, 0, 0,
1658 op_data->op_suppgids[0], 0);
1660 ptlrpc_request_set_replen(req);
1662 rc = mdc_queue_wait(req);
1666 req_hus = req_capsule_server_get(&req->rq_pill, &RMF_HSM_USER_STATE);
1667 if (req_hus == NULL)
1668 GOTO(out, rc = -EPROTO);
1674 ptlrpc_req_finished(req);
1678 static int mdc_ioc_hsm_state_set(struct obd_export *exp,
1679 struct md_op_data *op_data)
1681 struct hsm_state_set *hss = op_data->op_data;
1682 struct hsm_state_set *req_hss;
1683 struct ptlrpc_request *req;
1687 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
1688 &RQF_MDS_HSM_STATE_SET);
1692 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_STATE_SET);
1694 ptlrpc_request_free(req);
1698 mdc_pack_body(req, &op_data->op_fid1, 0, 0,
1699 op_data->op_suppgids[0], 0);
1702 req_hss = req_capsule_client_get(&req->rq_pill, &RMF_HSM_STATE_SET);
1703 if (req_hss == NULL)
1704 GOTO(out, rc = -EPROTO);
1707 ptlrpc_request_set_replen(req);
1709 mdc_get_mod_rpc_slot(req, NULL);
1710 rc = ptlrpc_queue_wait(req);
1711 mdc_put_mod_rpc_slot(req, NULL);
1715 ptlrpc_req_finished(req);
1719 static int mdc_ioc_hsm_request(struct obd_export *exp,
1720 struct hsm_user_request *hur)
1722 struct obd_import *imp = class_exp2cliimp(exp);
1723 struct ptlrpc_request *req;
1724 struct hsm_request *req_hr;
1725 struct hsm_user_item *req_hui;
1730 req = ptlrpc_request_alloc(imp, &RQF_MDS_HSM_REQUEST);
1732 GOTO(out, rc = -ENOMEM);
1734 req_capsule_set_size(&req->rq_pill, &RMF_MDS_HSM_USER_ITEM, RCL_CLIENT,
1735 hur->hur_request.hr_itemcount
1736 * sizeof(struct hsm_user_item));
1737 req_capsule_set_size(&req->rq_pill, &RMF_GENERIC_DATA, RCL_CLIENT,
1738 hur->hur_request.hr_data_len);
1740 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_REQUEST);
1742 ptlrpc_request_free(req);
1746 mdc_pack_body(req, NULL, 0, 0, -1, 0);
1748 /* Copy hsm_request struct */
1749 req_hr = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_REQUEST);
1751 GOTO(out, rc = -EPROTO);
1752 *req_hr = hur->hur_request;
1754 /* Copy hsm_user_item structs */
1755 req_hui = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_USER_ITEM);
1756 if (req_hui == NULL)
1757 GOTO(out, rc = -EPROTO);
1758 memcpy(req_hui, hur->hur_user_item,
1759 hur->hur_request.hr_itemcount * sizeof(struct hsm_user_item));
1761 /* Copy opaque field */
1762 req_opaque = req_capsule_client_get(&req->rq_pill, &RMF_GENERIC_DATA);
1763 if (req_opaque == NULL)
1764 GOTO(out, rc = -EPROTO);
1765 memcpy(req_opaque, hur_data(hur), hur->hur_request.hr_data_len);
1767 ptlrpc_request_set_replen(req);
1769 mdc_get_mod_rpc_slot(req, NULL);
1770 rc = ptlrpc_queue_wait(req);
1771 mdc_put_mod_rpc_slot(req, NULL);
1776 ptlrpc_req_finished(req);
1780 static struct kuc_hdr *changelog_kuc_hdr(char *buf, size_t len, __u32 flags)
1782 struct kuc_hdr *lh = (struct kuc_hdr *)buf;
1784 LASSERT(len <= KUC_CHANGELOG_MSG_MAXSIZE);
1786 lh->kuc_magic = KUC_MAGIC;
1787 lh->kuc_transport = KUC_TRANSPORT_CHANGELOG;
1788 lh->kuc_flags = flags;
1789 lh->kuc_msgtype = CL_RECORD;
1790 lh->kuc_msglen = len;
1794 struct changelog_show {
1796 enum changelog_send_flag cs_flags;
1799 struct obd_device *cs_obd;
1802 static inline char *cs_obd_name(struct changelog_show *cs)
1804 return cs->cs_obd->obd_name;
1807 static int changelog_kkuc_cb(const struct lu_env *env, struct llog_handle *llh,
1808 struct llog_rec_hdr *hdr, void *data)
1810 struct changelog_show *cs = data;
1811 struct llog_changelog_rec *rec = (struct llog_changelog_rec *)hdr;
1817 if (rec->cr_hdr.lrh_type != CHANGELOG_REC) {
1819 CERROR("%s: not a changelog rec %x/%d: rc = %d\n",
1820 cs_obd_name(cs), rec->cr_hdr.lrh_type,
1821 rec->cr.cr_type, rc);
1825 if (rec->cr.cr_index < cs->cs_startrec) {
1826 /* Skip entries earlier than what we are interested in */
1827 CDEBUG(D_HSM, "rec="LPU64" start="LPU64"\n",
1828 rec->cr.cr_index, cs->cs_startrec);
1832 CDEBUG(D_HSM, LPU64" %02d%-5s "LPU64" 0x%x t="DFID" p="DFID" %.*s\n",
1833 rec->cr.cr_index, rec->cr.cr_type,
1834 changelog_type2str(rec->cr.cr_type), rec->cr.cr_time,
1835 rec->cr.cr_flags & CLF_FLAGMASK,
1836 PFID(&rec->cr.cr_tfid), PFID(&rec->cr.cr_pfid),
1837 rec->cr.cr_namelen, changelog_rec_name(&rec->cr));
1839 len = sizeof(*lh) + changelog_rec_size(&rec->cr) + rec->cr.cr_namelen;
1841 /* Set up the message */
1842 lh = changelog_kuc_hdr(cs->cs_buf, len, cs->cs_flags);
1843 memcpy(lh + 1, &rec->cr, len - sizeof(*lh));
1845 rc = libcfs_kkuc_msg_put(cs->cs_fp, lh);
1846 CDEBUG(D_HSM, "kucmsg fp %p len %zu rc %d\n", cs->cs_fp, len, rc);
1851 static int mdc_changelog_send_thread(void *csdata)
1853 struct changelog_show *cs = csdata;
1854 struct llog_ctxt *ctxt = NULL;
1855 struct llog_handle *llh = NULL;
1856 struct kuc_hdr *kuch;
1857 enum llog_flag flags = LLOG_F_IS_CAT;
1860 CDEBUG(D_HSM, "changelog to fp=%p start "LPU64"\n",
1861 cs->cs_fp, cs->cs_startrec);
1863 OBD_ALLOC(cs->cs_buf, KUC_CHANGELOG_MSG_MAXSIZE);
1864 if (cs->cs_buf == NULL)
1865 GOTO(out, rc = -ENOMEM);
1867 /* Set up the remote catalog handle */
1868 ctxt = llog_get_context(cs->cs_obd, LLOG_CHANGELOG_REPL_CTXT);
1870 GOTO(out, rc = -ENOENT);
1871 rc = llog_open(NULL, ctxt, &llh, NULL, CHANGELOG_CATALOG,
1874 CERROR("%s: fail to open changelog catalog: rc = %d\n",
1875 cs_obd_name(cs), rc);
1879 if (cs->cs_flags & CHANGELOG_FLAG_JOBID)
1880 flags |= LLOG_F_EXT_JOBID;
1882 rc = llog_init_handle(NULL, llh, flags, NULL);
1884 CERROR("llog_init_handle failed %d\n", rc);
1888 rc = llog_cat_process(NULL, llh, changelog_kkuc_cb, cs, 0, 0);
1890 /* Send EOF no matter what our result */
1891 kuch = changelog_kuc_hdr(cs->cs_buf, sizeof(*kuch), cs->cs_flags);
1892 kuch->kuc_msgtype = CL_EOF;
1893 libcfs_kkuc_msg_put(cs->cs_fp, kuch);
1898 llog_cat_close(NULL, llh);
1900 llog_ctxt_put(ctxt);
1902 OBD_FREE(cs->cs_buf, KUC_CHANGELOG_MSG_MAXSIZE);
1907 static int mdc_ioc_changelog_send(struct obd_device *obd,
1908 struct ioc_changelog *icc)
1910 struct changelog_show *cs;
1911 struct task_struct *task;
1914 /* Freed in mdc_changelog_send_thread */
1920 cs->cs_startrec = icc->icc_recno;
1921 /* matching fput in mdc_changelog_send_thread */
1922 cs->cs_fp = fget(icc->icc_id);
1923 cs->cs_flags = icc->icc_flags;
1926 * New thread because we should return to user app before
1927 * writing into our pipe
1929 task = kthread_run(mdc_changelog_send_thread, cs,
1930 "mdc_clg_send_thread");
1933 CERROR("%s: cannot start changelog thread: rc = %d\n",
1934 cs_obd_name(cs), rc);
1938 CDEBUG(D_HSM, "%s: started changelog thread\n",
1945 static int mdc_ioc_hsm_ct_start(struct obd_export *exp,
1946 struct lustre_kernelcomm *lk);
1948 static int mdc_quotactl(struct obd_device *unused, struct obd_export *exp,
1949 struct obd_quotactl *oqctl)
1951 struct ptlrpc_request *req;
1952 struct obd_quotactl *oqc;
1956 req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
1957 &RQF_MDS_QUOTACTL, LUSTRE_MDS_VERSION,
1962 oqc = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1965 ptlrpc_request_set_replen(req);
1966 ptlrpc_at_set_req_timeout(req);
1967 req->rq_no_resend = 1;
1969 rc = ptlrpc_queue_wait(req);
1971 CERROR("ptlrpc_queue_wait failed, rc: %d\n", rc);
1973 if (req->rq_repmsg &&
1974 (oqc = req_capsule_server_get(&req->rq_pill, &RMF_OBD_QUOTACTL))) {
1977 CERROR ("Can't unpack obd_quotactl\n");
1980 ptlrpc_req_finished(req);
1985 static int mdc_ioc_swap_layouts(struct obd_export *exp,
1986 struct md_op_data *op_data)
1988 struct list_head cancels = LIST_HEAD_INIT(cancels);
1989 struct ptlrpc_request *req;
1991 struct mdc_swap_layouts *msl, *payload;
1994 msl = op_data->op_data;
1996 /* When the MDT will get the MDS_SWAP_LAYOUTS RPC the
1997 * first thing it will do is to cancel the 2 layout
1998 * locks held by this client.
1999 * So the client must cancel its layout locks on the 2 fids
2000 * with the request RPC to avoid extra RPC round trips.
2002 count = mdc_resource_get_unused(exp, &op_data->op_fid1, &cancels,
2003 LCK_EX, MDS_INODELOCK_LAYOUT |
2004 MDS_INODELOCK_XATTR);
2005 count += mdc_resource_get_unused(exp, &op_data->op_fid2, &cancels,
2006 LCK_EX, MDS_INODELOCK_LAYOUT |
2007 MDS_INODELOCK_XATTR);
2009 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
2010 &RQF_MDS_SWAP_LAYOUTS);
2012 ldlm_lock_list_put(&cancels, l_bl_ast, count);
2016 rc = mdc_prep_elc_req(exp, req, MDS_SWAP_LAYOUTS, &cancels, count);
2018 ptlrpc_request_free(req);
2022 mdc_swap_layouts_pack(req, op_data);
2024 payload = req_capsule_client_get(&req->rq_pill, &RMF_SWAP_LAYOUTS);
2029 ptlrpc_request_set_replen(req);
2031 rc = ptlrpc_queue_wait(req);
2037 ptlrpc_req_finished(req);
2041 static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
2042 void *karg, void __user *uarg)
2044 struct obd_device *obd = exp->exp_obd;
2045 struct obd_ioctl_data *data = karg;
2046 struct obd_import *imp = obd->u.cli.cl_import;
2050 if (!try_module_get(THIS_MODULE)) {
2051 CERROR("%s: cannot get module '%s'\n", obd->obd_name,
2052 module_name(THIS_MODULE));
2056 case OBD_IOC_CHANGELOG_SEND:
2057 rc = mdc_ioc_changelog_send(obd, karg);
2059 case OBD_IOC_CHANGELOG_CLEAR: {
2060 struct ioc_changelog *icc = karg;
2061 struct changelog_setinfo cs =
2062 {.cs_recno = icc->icc_recno, .cs_id = icc->icc_id};
2063 rc = obd_set_info_async(NULL, exp, strlen(KEY_CHANGELOG_CLEAR),
2064 KEY_CHANGELOG_CLEAR, sizeof(cs), &cs,
2068 case OBD_IOC_FID2PATH:
2069 rc = mdc_ioc_fid2path(exp, karg);
2071 case LL_IOC_HSM_CT_START:
2072 rc = mdc_ioc_hsm_ct_start(exp, karg);
2073 /* ignore if it was already registered on this MDS. */
2077 case LL_IOC_HSM_PROGRESS:
2078 rc = mdc_ioc_hsm_progress(exp, karg);
2080 case LL_IOC_HSM_STATE_GET:
2081 rc = mdc_ioc_hsm_state_get(exp, karg);
2083 case LL_IOC_HSM_STATE_SET:
2084 rc = mdc_ioc_hsm_state_set(exp, karg);
2086 case LL_IOC_HSM_ACTION:
2087 rc = mdc_ioc_hsm_current_action(exp, karg);
2089 case LL_IOC_HSM_REQUEST:
2090 rc = mdc_ioc_hsm_request(exp, karg);
2092 case OBD_IOC_CLIENT_RECOVER:
2093 rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1, 0);
2097 case IOC_OSC_SET_ACTIVE:
2098 rc = ptlrpc_set_import_active(imp, data->ioc_offset);
2100 case OBD_IOC_PING_TARGET:
2101 rc = ptlrpc_obd_ping(obd);
2104 * Normally IOC_OBD_STATFS, OBD_IOC_QUOTACTL iocontrol are handled by
2105 * LMV instead of MDC. But when the cluster is upgraded from 1.8,
2106 * there'd be no LMV layer thus we might be called here. Eventually
2107 * this code should be removed.
2110 case IOC_OBD_STATFS: {
2111 struct obd_statfs stat_buf = {0};
2113 if (*((__u32 *) data->ioc_inlbuf2) != 0)
2114 GOTO(out, rc = -ENODEV);
2117 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(obd),
2118 min((int)data->ioc_plen2,
2119 (int)sizeof(struct obd_uuid))))
2120 GOTO(out, rc = -EFAULT);
2122 rc = mdc_statfs(NULL, obd->obd_self_export, &stat_buf,
2123 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
2128 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
2129 min((int) data->ioc_plen1,
2130 (int) sizeof(stat_buf))))
2131 GOTO(out, rc = -EFAULT);
2135 case OBD_IOC_QUOTACTL: {
2136 struct if_quotactl *qctl = karg;
2137 struct obd_quotactl *oqctl;
2139 OBD_ALLOC_PTR(oqctl);
2141 GOTO(out, rc = -ENOMEM);
2143 QCTL_COPY(oqctl, qctl);
2144 rc = obd_quotactl(exp, oqctl);
2146 QCTL_COPY(qctl, oqctl);
2147 qctl->qc_valid = QC_MDTIDX;
2148 qctl->obd_uuid = obd->u.cli.cl_target_uuid;
2151 OBD_FREE_PTR(oqctl);
2154 case LL_IOC_GET_CONNECT_FLAGS:
2155 if (copy_to_user(uarg, exp_connect_flags_ptr(exp),
2156 sizeof(*exp_connect_flags_ptr(exp))))
2157 GOTO(out, rc = -EFAULT);
2160 case LL_IOC_LOV_SWAP_LAYOUTS:
2161 rc = mdc_ioc_swap_layouts(exp, karg);
2164 CERROR("unrecognised ioctl: cmd = %#x\n", cmd);
2165 GOTO(out, rc = -ENOTTY);
2168 module_put(THIS_MODULE);
2173 static int mdc_get_info_rpc(struct obd_export *exp,
2174 u32 keylen, void *key,
2175 u32 vallen, void *val)
2177 struct obd_import *imp = class_exp2cliimp(exp);
2178 struct ptlrpc_request *req;
2183 req = ptlrpc_request_alloc(imp, &RQF_MDS_GET_INFO);
2187 req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_KEY,
2188 RCL_CLIENT, keylen);
2189 req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_VALLEN,
2190 RCL_CLIENT, sizeof(vallen));
2192 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GET_INFO);
2194 ptlrpc_request_free(req);
2198 tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_KEY);
2199 memcpy(tmp, key, keylen);
2200 tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_VALLEN);
2201 memcpy(tmp, &vallen, sizeof(vallen));
2203 req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_VAL,
2204 RCL_SERVER, vallen);
2205 ptlrpc_request_set_replen(req);
2207 rc = ptlrpc_queue_wait(req);
2208 /* -EREMOTE means the get_info result is partial, and it needs to
2209 * continue on another MDT, see fid2path part in lmv_iocontrol */
2210 if (rc == 0 || rc == -EREMOTE) {
2211 tmp = req_capsule_server_get(&req->rq_pill, &RMF_GETINFO_VAL);
2212 memcpy(val, tmp, vallen);
2213 if (ptlrpc_rep_need_swab(req)) {
2214 if (KEY_IS(KEY_FID2PATH))
2215 lustre_swab_fid2path(val);
2218 ptlrpc_req_finished(req);
2223 static void lustre_swab_hai(struct hsm_action_item *h)
2225 __swab32s(&h->hai_len);
2226 __swab32s(&h->hai_action);
2227 lustre_swab_lu_fid(&h->hai_fid);
2228 lustre_swab_lu_fid(&h->hai_dfid);
2229 __swab64s(&h->hai_cookie);
2230 __swab64s(&h->hai_extent.offset);
2231 __swab64s(&h->hai_extent.length);
2232 __swab64s(&h->hai_gid);
2235 static void lustre_swab_hal(struct hsm_action_list *h)
2237 struct hsm_action_item *hai;
2240 __swab32s(&h->hal_version);
2241 __swab32s(&h->hal_count);
2242 __swab32s(&h->hal_archive_id);
2243 __swab64s(&h->hal_flags);
2245 for (i = 0; i < h->hal_count; i++, hai = hai_next(hai))
2246 lustre_swab_hai(hai);
2249 static void lustre_swab_kuch(struct kuc_hdr *l)
2251 __swab16s(&l->kuc_magic);
2252 /* __u8 l->kuc_transport */
2253 __swab16s(&l->kuc_msgtype);
2254 __swab16s(&l->kuc_msglen);
2257 static int mdc_ioc_hsm_ct_start(struct obd_export *exp,
2258 struct lustre_kernelcomm *lk)
2260 struct obd_import *imp = class_exp2cliimp(exp);
2261 __u32 archive = lk->lk_data;
2264 if (lk->lk_group != KUC_GRP_HSM) {
2265 CERROR("Bad copytool group %d\n", lk->lk_group);
2269 CDEBUG(D_HSM, "CT start r%d w%d u%d g%d f%#x\n", lk->lk_rfd, lk->lk_wfd,
2270 lk->lk_uid, lk->lk_group, lk->lk_flags);
2272 if (lk->lk_flags & LK_FLG_STOP) {
2273 /* Unregister with the coordinator */
2274 rc = mdc_ioc_hsm_ct_unregister(imp);
2276 rc = mdc_ioc_hsm_ct_register(imp, archive);
2283 * Send a message to any listening copytools
2284 * @param val KUC message (kuc_hdr + hsm_action_list)
2285 * @param len total length of message
2287 static int mdc_hsm_copytool_send(size_t len, void *val)
2289 struct kuc_hdr *lh = (struct kuc_hdr *)val;
2290 struct hsm_action_list *hal = (struct hsm_action_list *)(lh + 1);
2294 if (len < sizeof(*lh) + sizeof(*hal)) {
2295 CERROR("Short HSM message %zu < %zu\n", len,
2296 sizeof(*lh) + sizeof(*hal));
2299 if (lh->kuc_magic == __swab16(KUC_MAGIC)) {
2300 lustre_swab_kuch(lh);
2301 lustre_swab_hal(hal);
2302 } else if (lh->kuc_magic != KUC_MAGIC) {
2303 CERROR("Bad magic %x!=%x\n", lh->kuc_magic, KUC_MAGIC);
2307 CDEBUG(D_HSM, " Received message mg=%x t=%d m=%d l=%d actions=%d "
2309 lh->kuc_magic, lh->kuc_transport, lh->kuc_msgtype,
2310 lh->kuc_msglen, hal->hal_count, hal->hal_fsname);
2312 /* Broadcast to HSM listeners */
2313 rc = libcfs_kkuc_group_put(KUC_GRP_HSM, lh);
2319 * callback function passed to kuc for re-registering each HSM copytool
2320 * running on MDC, after MDT shutdown/recovery.
2321 * @param data copytool registration data
2322 * @param cb_arg callback argument (obd_import)
2324 static int mdc_hsm_ct_reregister(void *data, void *cb_arg)
2326 struct kkuc_ct_data *kcd = data;
2327 struct obd_import *imp = (struct obd_import *)cb_arg;
2330 if (kcd == NULL || kcd->kcd_magic != KKUC_CT_DATA_MAGIC)
2333 if (!obd_uuid_equals(&kcd->kcd_uuid, &imp->imp_obd->obd_uuid))
2336 CDEBUG(D_HA, "%s: recover copytool registration to MDT (archive=%#x)\n",
2337 imp->imp_obd->obd_name, kcd->kcd_archive);
2338 rc = mdc_ioc_hsm_ct_register(imp, kcd->kcd_archive);
2340 /* ignore error if the copytool is already registered */
2341 return (rc == -EEXIST) ? 0 : rc;
2345 * Re-establish all kuc contexts with MDT
2346 * after MDT shutdown/recovery.
2348 static int mdc_kuc_reregister(struct obd_import *imp)
2350 /* re-register HSM agents */
2351 return libcfs_kkuc_group_foreach(KUC_GRP_HSM, mdc_hsm_ct_reregister,
2355 static int mdc_set_info_async(const struct lu_env *env,
2356 struct obd_export *exp,
2357 u32 keylen, void *key,
2358 u32 vallen, void *val,
2359 struct ptlrpc_request_set *set)
2361 struct obd_import *imp = class_exp2cliimp(exp);
2365 if (KEY_IS(KEY_READ_ONLY)) {
2366 if (vallen != sizeof(int))
2369 spin_lock(&imp->imp_lock);
2370 if (*((int *)val)) {
2371 imp->imp_connect_flags_orig |= OBD_CONNECT_RDONLY;
2372 imp->imp_connect_data.ocd_connect_flags |=
2375 imp->imp_connect_flags_orig &= ~OBD_CONNECT_RDONLY;
2376 imp->imp_connect_data.ocd_connect_flags &=
2377 ~OBD_CONNECT_RDONLY;
2379 spin_unlock(&imp->imp_lock);
2381 rc = do_set_info_async(imp, MDS_SET_INFO, LUSTRE_MDS_VERSION,
2382 keylen, key, vallen, val, set);
2385 if (KEY_IS(KEY_SPTLRPC_CONF)) {
2386 sptlrpc_conf_client_adapt(exp->exp_obd);
2389 if (KEY_IS(KEY_FLUSH_CTX)) {
2390 sptlrpc_import_flush_my_ctx(imp);
2393 if (KEY_IS(KEY_CHANGELOG_CLEAR)) {
2394 rc = do_set_info_async(imp, MDS_SET_INFO, LUSTRE_MDS_VERSION,
2395 keylen, key, vallen, val, set);
2398 if (KEY_IS(KEY_HSM_COPYTOOL_SEND)) {
2399 rc = mdc_hsm_copytool_send(vallen, val);
2403 if (KEY_IS(KEY_DEFAULT_EASIZE)) {
2404 __u32 *default_easize = val;
2406 exp->exp_obd->u.cli.cl_default_mds_easize = *default_easize;
2410 CERROR("Unknown key %s\n", (char *)key);
2414 static int mdc_get_info(const struct lu_env *env, struct obd_export *exp,
2415 __u32 keylen, void *key, __u32 *vallen, void *val)
2419 if (KEY_IS(KEY_MAX_EASIZE)) {
2420 __u32 mdsize, *max_easize;
2422 if (*vallen != sizeof(int))
2424 mdsize = *(__u32 *)val;
2425 if (mdsize > exp->exp_obd->u.cli.cl_max_mds_easize)
2426 exp->exp_obd->u.cli.cl_max_mds_easize = mdsize;
2428 *max_easize = exp->exp_obd->u.cli.cl_max_mds_easize;
2430 } else if (KEY_IS(KEY_DEFAULT_EASIZE)) {
2431 __u32 *default_easize;
2433 if (*vallen != sizeof(int))
2435 default_easize = val;
2436 *default_easize = exp->exp_obd->u.cli.cl_default_mds_easize;
2438 } else if (KEY_IS(KEY_CONN_DATA)) {
2439 struct obd_import *imp = class_exp2cliimp(exp);
2440 struct obd_connect_data *data = val;
2442 if (*vallen != sizeof(*data))
2445 *data = imp->imp_connect_data;
2447 } else if (KEY_IS(KEY_TGT_COUNT)) {
2448 *((__u32 *)val) = 1;
2452 rc = mdc_get_info_rpc(exp, keylen, key, *vallen, val);
2457 static int mdc_fsync(struct obd_export *exp, const struct lu_fid *fid,
2458 struct ptlrpc_request **request)
2460 struct ptlrpc_request *req;
2465 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_SYNC);
2469 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SYNC);
2471 ptlrpc_request_free(req);
2475 mdc_pack_body(req, fid, 0, 0, -1, 0);
2477 ptlrpc_request_set_replen(req);
2479 rc = ptlrpc_queue_wait(req);
2481 ptlrpc_req_finished(req);
2487 static int mdc_import_event(struct obd_device *obd, struct obd_import *imp,
2488 enum obd_import_event event)
2492 LASSERT(imp->imp_obd == obd);
2495 case IMP_EVENT_DISCON: {
2497 /* XXX Pass event up to OBDs stack. used only for FLD now */
2498 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DISCON, NULL);
2502 case IMP_EVENT_INACTIVE: {
2503 struct client_obd *cli = &obd->u.cli;
2505 * Flush current sequence to make client obtain new one
2506 * from server in case of disconnect/reconnect.
2508 if (cli->cl_seq != NULL)
2509 seq_client_flush(cli->cl_seq);
2511 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
2514 case IMP_EVENT_INVALIDATE: {
2515 struct ldlm_namespace *ns = obd->obd_namespace;
2517 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
2521 case IMP_EVENT_ACTIVE:
2522 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
2523 /* redo the kuc registration after reconnecting */
2525 rc = mdc_kuc_reregister(imp);
2528 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
2530 case IMP_EVENT_DEACTIVATE:
2531 case IMP_EVENT_ACTIVATE:
2534 CERROR("Unknown import event %x\n", event);
2540 int mdc_fid_alloc(const struct lu_env *env, struct obd_export *exp,
2541 struct lu_fid *fid, struct md_op_data *op_data)
2543 struct client_obd *cli = &exp->exp_obd->u.cli;
2544 struct lu_client_seq *seq = cli->cl_seq;
2546 RETURN(seq_client_alloc_fid(env, seq, fid));
2549 static struct obd_uuid *mdc_get_uuid(struct obd_export *exp)
2551 struct client_obd *cli = &exp->exp_obd->u.cli;
2552 return &cli->cl_target_uuid;
2556 * Determine whether the lock can be canceled before replaying it during
2557 * recovery, non zero value will be return if the lock can be canceled,
2558 * or zero returned for not
2560 static int mdc_cancel_weight(struct ldlm_lock *lock)
2562 if (lock->l_resource->lr_type != LDLM_IBITS)
2565 /* FIXME: if we ever get into a situation where there are too many
2566 * opened files with open locks on a single node, then we really
2567 * should replay these open locks to reget it */
2568 if (lock->l_policy_data.l_inodebits.bits & MDS_INODELOCK_OPEN)
2574 static int mdc_resource_inode_free(struct ldlm_resource *res)
2576 if (res->lr_lvb_inode)
2577 res->lr_lvb_inode = NULL;
2582 static struct ldlm_valblock_ops inode_lvbo = {
2583 .lvbo_free = mdc_resource_inode_free
2586 static int mdc_llog_init(struct obd_device *obd)
2588 struct obd_llog_group *olg = &obd->obd_olg;
2589 struct llog_ctxt *ctxt;
2594 rc = llog_setup(NULL, obd, olg, LLOG_CHANGELOG_REPL_CTXT, obd,
2599 ctxt = llog_group_get_ctxt(olg, LLOG_CHANGELOG_REPL_CTXT);
2600 llog_initiator_connect(ctxt);
2601 llog_ctxt_put(ctxt);
2606 static void mdc_llog_finish(struct obd_device *obd)
2608 struct llog_ctxt *ctxt;
2612 ctxt = llog_get_context(obd, LLOG_CHANGELOG_REPL_CTXT);
2614 llog_cleanup(NULL, ctxt);
2619 static int mdc_setup(struct obd_device *obd, struct lustre_cfg *cfg)
2624 rc = ptlrpcd_addref();
2628 rc = client_obd_setup(obd, cfg);
2630 GOTO(err_ptlrpcd_decref, rc);
2631 #ifdef CONFIG_PROC_FS
2632 obd->obd_vars = lprocfs_mdc_obd_vars;
2633 lprocfs_obd_setup(obd);
2634 lprocfs_alloc_md_stats(obd, 0);
2636 sptlrpc_lprocfs_cliobd_attach(obd);
2637 ptlrpc_lprocfs_register_obd(obd);
2639 ns_register_cancel(obd->obd_namespace, mdc_cancel_weight);
2641 obd->obd_namespace->ns_lvbo = &inode_lvbo;
2643 rc = mdc_llog_init(obd);
2646 CERROR("failed to setup llogging subsystems\n");
2657 /* Initialize the default and maximum LOV EA sizes. This allows
2658 * us to make MDS RPCs with large enough reply buffers to hold a default
2659 * sized EA without having to calculate this (via a call into the
2660 * LOV + OSCs) each time we make an RPC. The maximum size is also tracked
2661 * but not used to avoid wastefully vmalloc()'ing large reply buffers when
2662 * a large number of stripes is possible. If a larger reply buffer is
2663 * required it will be reallocated in the ptlrpc layer due to overflow.
2665 static int mdc_init_ea_size(struct obd_export *exp, __u32 easize,
2668 struct obd_device *obd = exp->exp_obd;
2669 struct client_obd *cli = &obd->u.cli;
2672 if (cli->cl_max_mds_easize < easize)
2673 cli->cl_max_mds_easize = easize;
2675 if (cli->cl_default_mds_easize < def_easize)
2676 cli->cl_default_mds_easize = def_easize;
2681 static int mdc_precleanup(struct obd_device *obd)
2685 /* Failsafe, ok if racy */
2686 if (obd->obd_type->typ_refcnt <= 1)
2687 libcfs_kkuc_group_rem(0, KUC_GRP_HSM);
2689 obd_cleanup_client_import(obd);
2690 ptlrpc_lprocfs_unregister_obd(obd);
2691 lprocfs_obd_cleanup(obd);
2692 lprocfs_free_md_stats(obd);
2693 mdc_llog_finish(obd);
2697 static int mdc_cleanup(struct obd_device *obd)
2701 return client_obd_cleanup(obd);
2704 static int mdc_process_config(struct obd_device *obd, size_t len, void *buf)
2706 struct lustre_cfg *lcfg = buf;
2707 int rc = class_process_proc_param(PARAM_MDC, obd->obd_vars, lcfg, obd);
2708 return (rc > 0 ? 0: rc);
2711 static struct obd_ops mdc_obd_ops = {
2712 .o_owner = THIS_MODULE,
2713 .o_setup = mdc_setup,
2714 .o_precleanup = mdc_precleanup,
2715 .o_cleanup = mdc_cleanup,
2716 .o_add_conn = client_import_add_conn,
2717 .o_del_conn = client_import_del_conn,
2718 .o_connect = client_connect_import,
2719 .o_disconnect = client_disconnect_export,
2720 .o_iocontrol = mdc_iocontrol,
2721 .o_set_info_async = mdc_set_info_async,
2722 .o_statfs = mdc_statfs,
2723 .o_fid_init = client_fid_init,
2724 .o_fid_fini = client_fid_fini,
2725 .o_fid_alloc = mdc_fid_alloc,
2726 .o_import_event = mdc_import_event,
2727 .o_get_info = mdc_get_info,
2728 .o_process_config = mdc_process_config,
2729 .o_get_uuid = mdc_get_uuid,
2730 .o_quotactl = mdc_quotactl,
2733 static struct md_ops mdc_md_ops = {
2734 .m_get_root = mdc_get_root,
2735 .m_null_inode = mdc_null_inode,
2736 .m_close = mdc_close,
2737 .m_create = mdc_create,
2738 .m_enqueue = mdc_enqueue,
2739 .m_getattr = mdc_getattr,
2740 .m_getattr_name = mdc_getattr_name,
2741 .m_intent_lock = mdc_intent_lock,
2743 .m_rename = mdc_rename,
2744 .m_setattr = mdc_setattr,
2745 .m_setxattr = mdc_setxattr,
2746 .m_getxattr = mdc_getxattr,
2747 .m_fsync = mdc_fsync,
2748 .m_read_page = mdc_read_page,
2749 .m_unlink = mdc_unlink,
2750 .m_cancel_unused = mdc_cancel_unused,
2751 .m_init_ea_size = mdc_init_ea_size,
2752 .m_set_lock_data = mdc_set_lock_data,
2753 .m_lock_match = mdc_lock_match,
2754 .m_get_lustre_md = mdc_get_lustre_md,
2755 .m_free_lustre_md = mdc_free_lustre_md,
2756 .m_set_open_replay_data = mdc_set_open_replay_data,
2757 .m_clear_open_replay_data = mdc_clear_open_replay_data,
2758 .m_intent_getattr_async = mdc_intent_getattr_async,
2759 .m_revalidate_lock = mdc_revalidate_lock
2762 static int __init mdc_init(void)
2764 return class_register_type(&mdc_obd_ops, &mdc_md_ops, true, NULL,
2765 LUSTRE_MDC_NAME, NULL);
2768 static void __exit mdc_exit(void)
2770 class_unregister_type(LUSTRE_MDC_NAME);
2773 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
2774 MODULE_DESCRIPTION("Lustre Metadata Client");
2775 MODULE_VERSION(LUSTRE_VERSION_STRING);
2776 MODULE_LICENSE("GPL");
2778 module_init(mdc_init);
2779 module_exit(mdc_exit);