1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * lustre/ptlrpc/layout.c
5 * Lustre Metadata Target (mdt) request handler
7 * Copyright (c) 2006 Cluster File Systems, Inc.
8 * Author: Nikita Danilov <nikita@clusterfs.com>
10 * This file is part of the Lustre file system, http://www.lustre.org
11 * Lustre is a trademark of Cluster File Systems, Inc.
13 * You may have signed or agreed to another license before downloading
14 * this software. If so, you are bound by the terms and conditions
15 * of that agreement, and the following does not apply to you. See the
16 * LICENSE file included with this distribution for more information.
18 * If you did not agree to a different license, then this copy of Lustre
19 * is open source software; you can redistribute it and/or modify it
20 * under the terms of version 2 of the GNU General Public License as
21 * published by the Free Software Foundation.
23 * In either case, Lustre is distributed in the hope that it will be
24 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
25 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * license text for more details.
29 #if !defined(__REQ_LAYOUT_USER__)
32 # define EXPORT_SYMTAB
34 #define DEBUG_SUBSYSTEM S_RPC
37 #include <linux/module.h>
39 # include <liblustre.h>
42 /* LUSTRE_VERSION_CODE */
43 #include <lustre_ver.h>
45 #include <obd_support.h>
46 /* lustre_swab_mdt_body */
47 #include <lustre/lustre_idl.h>
48 /* obd2cli_tgt() (required by DEBUG_REQ()) */
51 /* __REQ_LAYOUT_USER__ */
53 /* struct ptlrpc_request, lustre_msg* */
54 #include <lustre_req_layout.h>
55 #include <linux/lustre_acl.h>
58 * empty set of fields... for suitable definition of emptiness.
60 static const struct req_msg_field *empty[] = {
64 static const struct req_msg_field *mgs_target_info_only[] = {
69 static const struct req_msg_field *mgs_set_info[] = {
74 static const struct req_msg_field *log_cancel_client[] = {
79 static const struct req_msg_field *mdt_body_only[] = {
84 static const struct req_msg_field *mdt_body_capa[] = {
90 static const struct req_msg_field *quotactl_only[] = {
95 static const struct req_msg_field *qunit_data_only[] = {
100 static const struct req_msg_field *mdt_close_client[] = {
107 static const struct req_msg_field *obd_statfs_server[] = {
112 static const struct req_msg_field *seq_query_client[] = {
118 static const struct req_msg_field *seq_query_server[] = {
123 static const struct req_msg_field *fld_query_client[] = {
129 static const struct req_msg_field *fld_query_server[] = {
134 static const struct req_msg_field *mds_getattr_name_client[] = {
141 static const struct req_msg_field *mds_reint_client[] = {
146 static const struct req_msg_field *mds_reint_create_client[] = {
153 static const struct req_msg_field *mds_reint_create_slave_client[] = {
162 static const struct req_msg_field *mds_reint_create_rmt_acl_client[] = {
171 static const struct req_msg_field *mds_reint_create_sym_client[] = {
180 static const struct req_msg_field *mds_reint_open_client[] = {
189 static const struct req_msg_field *mds_reint_open_server[] = {
198 static const struct req_msg_field *mds_reint_unlink_client[] = {
206 static const struct req_msg_field *mds_reint_link_client[] = {
215 static const struct req_msg_field *mds_reint_rename_client[] = {
225 static const struct req_msg_field *mds_last_unlink_server[] = {
232 static const struct req_msg_field *mds_reint_setattr_client[] = {
242 static const struct req_msg_field *mds_reint_setxattr_client[] = {
250 static const struct req_msg_field *obd_connect_client[] = {
258 static const struct req_msg_field *obd_connect_server[] = {
263 static const struct req_msg_field *mds_set_info_client[] = {
269 static const struct req_msg_field *ldlm_enqueue_client[] = {
274 static const struct req_msg_field *ldlm_enqueue_server[] = {
279 static const struct req_msg_field *ldlm_enqueue_lvb_server[] = {
285 static const struct req_msg_field *ldlm_cp_callback_client[] = {
291 static const struct req_msg_field *ldlm_gl_callback_server[] = {
296 static const struct req_msg_field *ldlm_intent_client[] = {
303 static const struct req_msg_field *ldlm_intent_server[] = {
311 static const struct req_msg_field *ldlm_intent_open_server[] = {
321 static const struct req_msg_field *ldlm_intent_getattr_client[] = {
325 &RMF_MDT_BODY, /* coincides with mds_getattr_name_client[] */
330 static const struct req_msg_field *ldlm_intent_getattr_server[] = {
339 static const struct req_msg_field *ldlm_intent_create_client[] = {
343 &RMF_REC_REINT, /* coincides with mds_reint_create_client[] */
349 static const struct req_msg_field *ldlm_intent_open_client[] = {
353 &RMF_REC_REINT, /* coincides with mds_reint_open_client[] */
361 static const struct req_msg_field *ldlm_intent_unlink_client[] = {
365 &RMF_REC_REINT, /* coincides with mds_reint_unlink_client[] */
370 static const struct req_msg_field *mds_getxattr_client[] = {
378 static const struct req_msg_field *mds_getxattr_server[] = {
384 static const struct req_msg_field *mds_getattr_server[] = {
393 static const struct req_msg_field *mds_setattr_server[] = {
402 static const struct req_msg_field *llog_catinfo_client[] = {
408 static const struct req_msg_field *llog_catinfo_server[] = {
413 static const struct req_msg_field *llog_origin_handle_create_client[] = {
419 static const struct req_msg_field *llogd_body_only[] = {
424 static const struct req_msg_field *llog_log_hdr_only[] = {
429 static const struct req_msg_field *llogd_conn_body_only[] = {
434 static const struct req_msg_field *llog_origin_handle_next_block_server[] = {
440 static const struct req_msg_field *ost_body_only[] = {
445 static const struct req_msg_field *ost_body_capa[] = {
451 static const struct req_msg_field *ost_destroy_client[] = {
458 static const struct req_msg_field *ost_brw_client[] = {
466 static const struct req_msg_field *ost_brw_server[] = {
472 static const struct req_msg_field *ost_set_info_client[] = {
478 static const struct req_msg_field *ost_get_info_generic_server[] = {
483 static const struct req_msg_field *ost_get_info_generic_client[] = {
488 static const struct req_msg_field *ost_get_last_id_server[] = {
493 static const struct req_format *req_formats[] = {
506 &RQF_MDS_GETATTR_NAME,
515 &RQF_MDS_DONE_WRITING,
517 &RQF_MDS_REINT_CREATE,
518 &RQF_MDS_REINT_CREATE_RMT_ACL,
519 &RQF_MDS_REINT_CREATE_SLAVE,
520 &RQF_MDS_REINT_CREATE_SYM,
522 &RQF_MDS_REINT_UNLINK,
524 &RQF_MDS_REINT_RENAME,
525 &RQF_MDS_REINT_SETATTR,
526 &RQF_MDS_REINT_SETXATTR,
529 &RQF_MDS_QUOTA_DQACQ,
543 &RQF_OST_GET_INFO_GENERIC,
544 &RQF_OST_GET_INFO_LAST_ID,
546 &RQF_LDLM_ENQUEUE_LVB,
550 &RQF_LDLM_CP_CALLBACK,
551 &RQF_LDLM_BL_CALLBACK,
552 &RQF_LDLM_GL_CALLBACK,
554 &RQF_LDLM_INTENT_GETATTR,
555 &RQF_LDLM_INTENT_OPEN,
556 &RQF_LDLM_INTENT_CREATE,
557 &RQF_LDLM_INTENT_UNLINK,
560 &RQF_LLOG_ORIGIN_HANDLE_CREATE,
561 &RQF_LLOG_ORIGIN_HANDLE_DESTROY,
562 &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK,
563 &RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK,
564 &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER,
565 &RQF_LLOG_ORIGIN_CONNECT
568 struct req_msg_field {
570 const char *rmf_name;
572 * Field length. (-1) means "variable length".
575 void (*rmf_swabber)(void *);
576 int rmf_offset[ARRAY_SIZE(req_formats)][RCL_NR];
580 RMF_F_STRING = 1 << 0
588 #define DEFINE_MSGF(name, flags, size, swabber) { \
589 .rmf_name = (name), \
590 .rmf_flags = (flags), \
591 .rmf_size = (size), \
592 .rmf_swabber = (void (*)(void*))(swabber) \
595 const struct req_msg_field RMF_GENERIC_DATA =
596 DEFINE_MSGF("generic_data", 0,
598 EXPORT_SYMBOL(RMF_GENERIC_DATA);
600 const struct req_msg_field RMF_MGS_TARGET_INFO =
601 DEFINE_MSGF("mgs_target_info", 0,
602 sizeof(struct mgs_target_info),
603 lustre_swab_mgs_target_info);
604 EXPORT_SYMBOL(RMF_MGS_TARGET_INFO);
606 const struct req_msg_field RMF_MGS_SEND_PARAM =
607 DEFINE_MSGF("mgs_send_param", 0,
608 sizeof(struct mgs_send_param),
610 EXPORT_SYMBOL(RMF_MGS_SEND_PARAM);
612 const struct req_msg_field RMF_SETINFO_VAL =
613 DEFINE_MSGF("setinfo_val", 0,
614 sizeof(__u32), lustre_swab_generic_32s);
615 EXPORT_SYMBOL(RMF_SETINFO_VAL);
617 const struct req_msg_field RMF_SEQ_OPC =
618 DEFINE_MSGF("seq_query_opc", 0,
619 sizeof(__u32), lustre_swab_generic_32s);
620 EXPORT_SYMBOL(RMF_SEQ_OPC);
622 const struct req_msg_field RMF_SEQ_RANGE =
623 DEFINE_MSGF("seq_query_range", 0,
624 sizeof(struct lu_range), lustre_swab_lu_range);
625 EXPORT_SYMBOL(RMF_SEQ_RANGE);
627 const struct req_msg_field RMF_FLD_OPC =
628 DEFINE_MSGF("fld_query_opc", 0,
629 sizeof(__u32), lustre_swab_generic_32s);
630 EXPORT_SYMBOL(RMF_FLD_OPC);
632 const struct req_msg_field RMF_FLD_MDFLD =
633 DEFINE_MSGF("fld_query_mdfld", 0,
634 sizeof(struct md_fld), lustre_swab_md_fld);
635 EXPORT_SYMBOL(RMF_FLD_MDFLD);
637 const struct req_msg_field RMF_MDT_BODY =
638 DEFINE_MSGF("mdt_body", 0,
639 sizeof(struct mdt_body), lustre_swab_mdt_body);
640 EXPORT_SYMBOL(RMF_MDT_BODY);
642 const struct req_msg_field RMF_OBD_QUOTACTL =
643 DEFINE_MSGF("obd_quotactl", 0,
644 sizeof(struct obd_quotactl), lustre_swab_obd_quotactl);
645 EXPORT_SYMBOL(RMF_OBD_QUOTACTL);
647 const struct req_msg_field RMF_QUNIT_DATA =
648 DEFINE_MSGF("qunit_data", 0,
649 sizeof(struct qunit_data), NULL);
650 EXPORT_SYMBOL(RMF_QUNIT_DATA);
652 const struct req_msg_field RMF_MDT_EPOCH =
653 DEFINE_MSGF("mdt_epoch", 0,
654 sizeof(struct mdt_epoch), lustre_swab_mdt_epoch);
655 EXPORT_SYMBOL(RMF_MDT_EPOCH);
657 const struct req_msg_field RMF_PTLRPC_BODY =
658 DEFINE_MSGF("ptlrpc_body", 0,
659 sizeof(struct ptlrpc_body), lustre_swab_ptlrpc_body);
660 EXPORT_SYMBOL(RMF_PTLRPC_BODY);
662 const struct req_msg_field RMF_OBD_STATFS =
663 DEFINE_MSGF("obd_statfs", 0,
664 sizeof(struct obd_statfs), lustre_swab_obd_statfs);
665 EXPORT_SYMBOL(RMF_OBD_STATFS);
667 const struct req_msg_field RMF_SETINFO_KEY =
668 DEFINE_MSGF("setinfo_key", 0, -1, NULL);
669 EXPORT_SYMBOL(RMF_SETINFO_KEY);
671 const struct req_msg_field RMF_NAME =
672 DEFINE_MSGF("name", RMF_F_STRING, -1, NULL);
673 EXPORT_SYMBOL(RMF_NAME);
675 const struct req_msg_field RMF_SYMTGT =
676 DEFINE_MSGF("symtgt", RMF_F_STRING, -1, NULL);
677 EXPORT_SYMBOL(RMF_SYMTGT);
679 const struct req_msg_field RMF_TGTUUID =
680 DEFINE_MSGF("tgtuuid", RMF_F_STRING, sizeof(struct obd_uuid) - 1, NULL);
681 EXPORT_SYMBOL(RMF_TGTUUID);
683 const struct req_msg_field RMF_CLUUID =
684 DEFINE_MSGF("cluuid", RMF_F_STRING, sizeof(struct obd_uuid) - 1, NULL);
685 EXPORT_SYMBOL(RMF_CLUUID);
687 const struct req_msg_field RMF_STRING =
688 DEFINE_MSGF("string", RMF_F_STRING, -1, NULL);
689 EXPORT_SYMBOL(RMF_STRING);
691 const struct req_msg_field RMF_LLOGD_BODY =
692 DEFINE_MSGF("llogd_body", 0,
693 sizeof(struct llogd_body), lustre_swab_llogd_body);
694 EXPORT_SYMBOL(RMF_LLOGD_BODY);
696 const struct req_msg_field RMF_LLOG_LOG_HDR =
697 DEFINE_MSGF("llog_log_hdr", 0,
698 sizeof(struct llog_log_hdr), lustre_swab_llog_hdr);
699 EXPORT_SYMBOL(RMF_LLOG_LOG_HDR);
701 const struct req_msg_field RMF_LLOGD_CONN_BODY =
702 DEFINE_MSGF("llogd_conn_body", 0,
703 sizeof(struct llogd_conn_body),
704 lustre_swab_llogd_conn_body);
705 EXPORT_SYMBOL(RMF_LLOGD_CONN_BODY);
708 * connection handle received in MDS_CONNECT request.
712 const struct req_msg_field RMF_CONN =
713 DEFINE_MSGF("conn", 0, sizeof(struct lustre_handle), NULL);
714 EXPORT_SYMBOL(RMF_CONN);
716 const struct req_msg_field RMF_CONNECT_DATA =
717 DEFINE_MSGF("cdata", 0,
718 sizeof(struct obd_connect_data), lustre_swab_connect);
719 EXPORT_SYMBOL(RMF_CONNECT_DATA);
721 const struct req_msg_field RMF_DLM_REQ =
722 DEFINE_MSGF("dlm_req", 0,
723 sizeof(struct ldlm_request), lustre_swab_ldlm_request);
724 EXPORT_SYMBOL(RMF_DLM_REQ);
726 const struct req_msg_field RMF_DLM_REP =
727 DEFINE_MSGF("dlm_rep", 0,
728 sizeof(struct ldlm_reply), lustre_swab_ldlm_reply);
729 EXPORT_SYMBOL(RMF_DLM_REP);
731 const struct req_msg_field RMF_LDLM_INTENT =
732 DEFINE_MSGF("ldlm_intent", 0,
733 sizeof(struct ldlm_intent), lustre_swab_ldlm_intent);
734 EXPORT_SYMBOL(RMF_LDLM_INTENT);
736 const struct req_msg_field RMF_DLM_LVB =
737 DEFINE_MSGF("dlm_lvb", 0, sizeof(struct ost_lvb), NULL);
738 EXPORT_SYMBOL(RMF_DLM_LVB);
740 const struct req_msg_field RMF_MDT_MD =
741 DEFINE_MSGF("mdt_md", 0, MIN_MD_SIZE, NULL);
742 EXPORT_SYMBOL(RMF_MDT_MD);
744 const struct req_msg_field RMF_REC_REINT =
745 DEFINE_MSGF("rec_reint", 0, sizeof(struct mdt_rec_reint),
746 lustre_swab_mdt_rec_reint);
747 EXPORT_SYMBOL(RMF_REC_REINT);
749 const struct req_msg_field RMF_REC_JOINFILE =
750 DEFINE_MSGF("rec_joinfile", 0, sizeof(struct mdt_rec_join),
751 lustre_swab_mdt_rec_join);
752 EXPORT_SYMBOL(RMF_REC_JOINFILE);
754 /* FIXME: this length should be defined as a macro */
755 const struct req_msg_field RMF_EADATA = DEFINE_MSGF("eadata", 0, -1, NULL);
756 EXPORT_SYMBOL(RMF_EADATA);
758 const struct req_msg_field RMF_ACL =
759 DEFINE_MSGF("acl", 0, LUSTRE_POSIX_ACL_MAX_SIZE, NULL);
760 EXPORT_SYMBOL(RMF_ACL);
762 const struct req_msg_field RMF_LOGCOOKIES =
763 DEFINE_MSGF("logcookies", 0, sizeof(struct llog_cookie), NULL);
764 EXPORT_SYMBOL(RMF_LOGCOOKIES);
766 const struct req_msg_field RMF_CAPA1 =
767 DEFINE_MSGF("capa", 0, sizeof(struct lustre_capa),
768 lustre_swab_lustre_capa);
769 EXPORT_SYMBOL(RMF_CAPA1);
771 const struct req_msg_field RMF_CAPA2 =
772 DEFINE_MSGF("capa", 0, sizeof(struct lustre_capa),
773 lustre_swab_lustre_capa);
774 EXPORT_SYMBOL(RMF_CAPA2);
779 const struct req_msg_field RMF_OST_BODY =
780 DEFINE_MSGF("ost_body", 0,
781 sizeof(struct ost_body), lustre_swab_ost_body);
782 EXPORT_SYMBOL(RMF_OST_BODY);
784 const struct req_msg_field RMF_OBD_IOOBJ =
785 DEFINE_MSGF("obd_ioobj", 0,
786 sizeof(struct obd_ioobj), lustre_swab_obd_ioobj);
787 EXPORT_SYMBOL(RMF_OBD_IOOBJ);
789 const struct req_msg_field RMF_NIOBUF_REMOTE =
790 DEFINE_MSGF("niobuf_remote", 0, -1, lustre_swab_niobuf_remote);
791 EXPORT_SYMBOL(RMF_NIOBUF_REMOTE);
793 const struct req_msg_field RMF_OBD_ID =
794 DEFINE_MSGF("obd_id", 0,
795 sizeof(obd_id), lustre_swab_ost_last_id);
796 EXPORT_SYMBOL(RMF_OBD_ID);
808 const struct req_msg_field **d;
812 #define DEFINE_REQ_FMT(name, client, client_nr, server, server_nr) { \
826 #define DEFINE_REQ_FMT0(name, client, server) \
827 DEFINE_REQ_FMT(name, client, ARRAY_SIZE(client), server, ARRAY_SIZE(server))
829 const struct req_format RQF_OBD_PING =
830 DEFINE_REQ_FMT0("OBD_PING", empty, empty);
831 EXPORT_SYMBOL(RQF_OBD_PING);
833 const struct req_format RQF_SEC_CTX =
834 DEFINE_REQ_FMT0("SEC_CTX", empty, empty);
835 EXPORT_SYMBOL(RQF_SEC_CTX);
837 const struct req_format RQF_MGS_TARGET_REG =
838 DEFINE_REQ_FMT0("MGS_TARGET_REG", mgs_target_info_only,
839 mgs_target_info_only);
840 EXPORT_SYMBOL(RQF_MGS_TARGET_REG);
842 const struct req_format RQF_MGS_SET_INFO =
843 DEFINE_REQ_FMT0("MGS_SET_INTO", mgs_set_info,
845 EXPORT_SYMBOL(RQF_MGS_SET_INFO);
847 const struct req_format RQF_LOG_CANCEL =
848 DEFINE_REQ_FMT0("OBD_LOG_CANCEL", log_cancel_client, empty);
849 EXPORT_SYMBOL(RQF_LOG_CANCEL);
851 const struct req_format RQF_MDS_QUOTACHECK =
852 DEFINE_REQ_FMT0("MDS_QUOTACHECK", quotactl_only, empty);
853 EXPORT_SYMBOL(RQF_MDS_QUOTACHECK);
855 const struct req_format RQF_OST_QUOTACHECK =
856 DEFINE_REQ_FMT0("OST_QUOTACHECK", quotactl_only, empty);
857 EXPORT_SYMBOL(RQF_OST_QUOTACHECK);
859 const struct req_format RQF_MDS_QUOTACTL =
860 DEFINE_REQ_FMT0("MDS_QUOTACTL", quotactl_only, quotactl_only);
861 EXPORT_SYMBOL(RQF_MDS_QUOTACTL);
863 const struct req_format RQF_OST_QUOTACTL =
864 DEFINE_REQ_FMT0("OST_QUOTACTL", quotactl_only, quotactl_only);
865 EXPORT_SYMBOL(RQF_OST_QUOTACTL);
867 const struct req_format RQF_QC_CALLBACK =
868 DEFINE_REQ_FMT0("QC_CALLBACK", quotactl_only, empty);
869 EXPORT_SYMBOL(RQF_QC_CALLBACK);
871 const struct req_format RQF_MDS_QUOTA_DQACQ =
872 DEFINE_REQ_FMT0("MDS_QUOTA_DQACQ", qunit_data_only, qunit_data_only);
873 EXPORT_SYMBOL(RQF_MDS_QUOTA_DQACQ);
875 const struct req_format RQF_SEQ_QUERY =
876 DEFINE_REQ_FMT0("SEQ_QUERY", seq_query_client, seq_query_server);
877 EXPORT_SYMBOL(RQF_SEQ_QUERY);
879 const struct req_format RQF_FLD_QUERY =
880 DEFINE_REQ_FMT0("FLD_QUERY", fld_query_client, fld_query_server);
881 EXPORT_SYMBOL(RQF_FLD_QUERY);
883 const struct req_format RQF_MDS_GETSTATUS =
884 DEFINE_REQ_FMT0("MDS_GETSTATUS", mdt_body_only, mdt_body_capa);
885 EXPORT_SYMBOL(RQF_MDS_GETSTATUS);
887 const struct req_format RQF_MDS_STATFS =
888 DEFINE_REQ_FMT0("MDS_STATFS", empty, obd_statfs_server);
889 EXPORT_SYMBOL(RQF_MDS_STATFS);
891 const struct req_format RQF_MDS_SYNC =
892 DEFINE_REQ_FMT0("MDS_SYNC", mdt_body_capa, mdt_body_only);
893 EXPORT_SYMBOL(RQF_MDS_SYNC);
895 const struct req_format RQF_MDS_GETATTR =
896 DEFINE_REQ_FMT0("MDS_GETATTR", mdt_body_capa, mds_getattr_server);
897 EXPORT_SYMBOL(RQF_MDS_GETATTR);
899 const struct req_format RQF_MDS_GETXATTR =
900 DEFINE_REQ_FMT0("MDS_GETXATTR",
901 mds_getxattr_client, mds_getxattr_server);
902 EXPORT_SYMBOL(RQF_MDS_GETXATTR);
904 const struct req_format RQF_MDS_GETATTR_NAME =
905 DEFINE_REQ_FMT0("MDS_GETATTR_NAME",
906 mds_getattr_name_client, mds_getattr_server);
907 EXPORT_SYMBOL(RQF_MDS_GETATTR_NAME);
909 const struct req_format RQF_MDS_REINT =
910 DEFINE_REQ_FMT0("MDS_REINT", mds_reint_client, mdt_body_only);
911 EXPORT_SYMBOL(RQF_MDS_REINT);
913 const struct req_format RQF_MDS_REINT_CREATE =
914 DEFINE_REQ_FMT0("MDS_REINT_CREATE",
915 mds_reint_create_client, mdt_body_capa);
916 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE);
918 const struct req_format RQF_MDS_REINT_CREATE_RMT_ACL =
919 DEFINE_REQ_FMT0("MDS_REINT_CREATE_RMT_ACL",
920 mds_reint_create_rmt_acl_client, mdt_body_capa);
921 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_RMT_ACL);
923 const struct req_format RQF_MDS_REINT_CREATE_SLAVE =
924 DEFINE_REQ_FMT0("MDS_REINT_CREATE_EA",
925 mds_reint_create_slave_client, mdt_body_capa);
926 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_SLAVE);
928 const struct req_format RQF_MDS_REINT_CREATE_SYM =
929 DEFINE_REQ_FMT0("MDS_REINT_CREATE_SYM",
930 mds_reint_create_sym_client, mdt_body_capa);
931 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_SYM);
933 const struct req_format RQF_MDS_REINT_OPEN =
934 DEFINE_REQ_FMT0("MDS_REINT_OPEN",
935 mds_reint_open_client, mds_reint_open_server);
936 EXPORT_SYMBOL(RQF_MDS_REINT_OPEN);
938 const struct req_format RQF_MDS_REINT_UNLINK =
939 DEFINE_REQ_FMT0("MDS_REINT_UNLINK", mds_reint_unlink_client,
940 mds_last_unlink_server);
941 EXPORT_SYMBOL(RQF_MDS_REINT_UNLINK);
943 const struct req_format RQF_MDS_REINT_LINK =
944 DEFINE_REQ_FMT0("MDS_REINT_LINK",
945 mds_reint_link_client, mdt_body_only);
946 EXPORT_SYMBOL(RQF_MDS_REINT_LINK);
948 const struct req_format RQF_MDS_REINT_RENAME =
949 DEFINE_REQ_FMT0("MDS_REINT_RENAME", mds_reint_rename_client,
950 mds_last_unlink_server);
951 EXPORT_SYMBOL(RQF_MDS_REINT_RENAME);
953 const struct req_format RQF_MDS_REINT_SETATTR =
954 DEFINE_REQ_FMT0("MDS_REINT_SETATTR",
955 mds_reint_setattr_client, mds_setattr_server);
956 EXPORT_SYMBOL(RQF_MDS_REINT_SETATTR);
958 const struct req_format RQF_MDS_REINT_SETXATTR =
959 DEFINE_REQ_FMT0("MDS_REINT_SETXATTR",
960 mds_reint_setxattr_client, mdt_body_only);
961 EXPORT_SYMBOL(RQF_MDS_REINT_SETXATTR);
963 const struct req_format RQF_MDS_CONNECT =
964 DEFINE_REQ_FMT0("MDS_CONNECT",
965 obd_connect_client, obd_connect_server);
966 EXPORT_SYMBOL(RQF_MDS_CONNECT);
968 const struct req_format RQF_MDS_DISCONNECT =
969 DEFINE_REQ_FMT0("MDS_DISCONNECT", empty, empty);
970 EXPORT_SYMBOL(RQF_MDS_DISCONNECT);
972 const struct req_format RQF_MDS_SET_INFO =
973 DEFINE_REQ_FMT0("MDS_SET_INFO", mds_set_info_client, empty);
974 EXPORT_SYMBOL(RQF_MDS_SET_INFO);
976 const struct req_format RQF_LDLM_ENQUEUE =
977 DEFINE_REQ_FMT0("LDLM_ENQUEUE",
978 ldlm_enqueue_client, ldlm_enqueue_lvb_server);
979 EXPORT_SYMBOL(RQF_LDLM_ENQUEUE);
981 const struct req_format RQF_LDLM_ENQUEUE_LVB =
982 DEFINE_REQ_FMT0("LDLM_ENQUEUE_LVB",
983 ldlm_enqueue_client, ldlm_enqueue_lvb_server);
984 EXPORT_SYMBOL(RQF_LDLM_ENQUEUE_LVB);
986 const struct req_format RQF_LDLM_CONVERT =
987 DEFINE_REQ_FMT0("LDLM_CONVERT",
988 ldlm_enqueue_client, ldlm_enqueue_server);
989 EXPORT_SYMBOL(RQF_LDLM_CONVERT);
991 const struct req_format RQF_LDLM_CANCEL =
992 DEFINE_REQ_FMT0("LDLM_CANCEL", ldlm_enqueue_client, empty);
993 EXPORT_SYMBOL(RQF_LDLM_CANCEL);
995 const struct req_format RQF_LDLM_CALLBACK =
996 DEFINE_REQ_FMT0("LDLM_CALLBACK", ldlm_enqueue_client, empty);
997 EXPORT_SYMBOL(RQF_LDLM_CALLBACK);
999 const struct req_format RQF_LDLM_CP_CALLBACK =
1000 DEFINE_REQ_FMT0("LDLM_CP_CALLBACK", ldlm_cp_callback_client, empty);
1001 EXPORT_SYMBOL(RQF_LDLM_CP_CALLBACK);
1003 const struct req_format RQF_LDLM_BL_CALLBACK =
1004 DEFINE_REQ_FMT0("LDLM_BL_CALLBACK", ldlm_enqueue_client, empty);
1005 EXPORT_SYMBOL(RQF_LDLM_BL_CALLBACK);
1007 const struct req_format RQF_LDLM_GL_CALLBACK =
1008 DEFINE_REQ_FMT0("LDLM_GL_CALLBACK", ldlm_enqueue_client,
1009 ldlm_gl_callback_server);
1010 EXPORT_SYMBOL(RQF_LDLM_GL_CALLBACK);
1012 const struct req_format RQF_LDLM_INTENT =
1013 DEFINE_REQ_FMT0("LDLM_INTENT",
1014 ldlm_intent_client, ldlm_intent_server);
1015 EXPORT_SYMBOL(RQF_LDLM_INTENT);
1017 const struct req_format RQF_LDLM_INTENT_GETATTR =
1018 DEFINE_REQ_FMT0("LDLM_INTENT_GETATTR",
1019 ldlm_intent_getattr_client, ldlm_intent_getattr_server);
1020 EXPORT_SYMBOL(RQF_LDLM_INTENT_GETATTR);
1022 const struct req_format RQF_LDLM_INTENT_OPEN =
1023 DEFINE_REQ_FMT0("LDLM_INTENT_OPEN",
1024 ldlm_intent_open_client, ldlm_intent_open_server);
1025 EXPORT_SYMBOL(RQF_LDLM_INTENT_OPEN);
1027 const struct req_format RQF_LDLM_INTENT_CREATE =
1028 DEFINE_REQ_FMT0("LDLM_INTENT_CREATE",
1029 ldlm_intent_create_client, ldlm_intent_getattr_server);
1030 EXPORT_SYMBOL(RQF_LDLM_INTENT_CREATE);
1032 const struct req_format RQF_LDLM_INTENT_UNLINK =
1033 DEFINE_REQ_FMT0("LDLM_INTENT_UNLINK",
1034 ldlm_intent_unlink_client, ldlm_intent_server);
1035 EXPORT_SYMBOL(RQF_LDLM_INTENT_UNLINK);
1037 const struct req_format RQF_MDS_CLOSE =
1038 DEFINE_REQ_FMT0("MDS_CLOSE",
1039 mdt_close_client, mds_last_unlink_server);
1040 EXPORT_SYMBOL(RQF_MDS_CLOSE);
1042 const struct req_format RQF_MDS_PIN =
1043 DEFINE_REQ_FMT0("MDS_PIN",
1044 mdt_body_capa, mdt_body_only);
1045 EXPORT_SYMBOL(RQF_MDS_PIN);
1047 const struct req_format RQF_MDS_UNPIN =
1048 DEFINE_REQ_FMT0("MDS_UNPIN", mdt_body_only, empty);
1049 EXPORT_SYMBOL(RQF_MDS_UNPIN);
1051 const struct req_format RQF_MDS_DONE_WRITING =
1052 DEFINE_REQ_FMT0("MDS_DONE_WRITING",
1053 mdt_close_client, mdt_body_only);
1054 EXPORT_SYMBOL(RQF_MDS_DONE_WRITING);
1056 const struct req_format RQF_MDS_READPAGE =
1057 DEFINE_REQ_FMT0("MDS_READPAGE",
1058 mdt_body_capa, mdt_body_only);
1059 EXPORT_SYMBOL(RQF_MDS_READPAGE);
1061 /* This is for split */
1062 const struct req_format RQF_MDS_WRITEPAGE =
1063 DEFINE_REQ_FMT0("MDS_WRITEPAGE",
1064 mdt_body_capa, mdt_body_only);
1065 EXPORT_SYMBOL(RQF_MDS_WRITEPAGE);
1067 const struct req_format RQF_MDS_IS_SUBDIR =
1068 DEFINE_REQ_FMT0("MDS_IS_SUBDIR",
1069 mdt_body_only, mdt_body_only);
1070 EXPORT_SYMBOL(RQF_MDS_IS_SUBDIR);
1072 const struct req_format RQF_LLOG_CATINFO =
1073 DEFINE_REQ_FMT0("LLOG_CATINFO",
1074 llog_catinfo_client, llog_catinfo_server);
1075 EXPORT_SYMBOL(RQF_LLOG_CATINFO);
1077 const struct req_format RQF_LLOG_ORIGIN_HANDLE_CREATE =
1078 DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_CREATE",
1079 llog_origin_handle_create_client, llogd_body_only);
1080 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_CREATE);
1082 const struct req_format RQF_LLOG_ORIGIN_HANDLE_DESTROY =
1083 DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_DESTROY",
1084 llogd_body_only, llogd_body_only);
1085 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_DESTROY);
1087 const struct req_format RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK =
1088 DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_NEXT_BLOCK",
1089 llogd_body_only, llog_origin_handle_next_block_server);
1090 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
1092 const struct req_format RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK =
1093 DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_PREV_BLOCK",
1094 llogd_body_only, llog_origin_handle_next_block_server);
1095 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK);
1097 const struct req_format RQF_LLOG_ORIGIN_HANDLE_READ_HEADER =
1098 DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_READ_HEADER",
1099 llogd_body_only, llog_log_hdr_only);
1100 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
1102 const struct req_format RQF_LLOG_ORIGIN_CONNECT =
1103 DEFINE_REQ_FMT0("LLOG_ORIGIN_CONNECT", llogd_conn_body_only, empty);
1104 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_CONNECT);
1106 const struct req_format RQF_OST_CONNECT =
1107 DEFINE_REQ_FMT0("OST_CONNECT",
1108 obd_connect_client, obd_connect_server);
1109 EXPORT_SYMBOL(RQF_OST_CONNECT);
1111 const struct req_format RQF_OST_DISCONNECT =
1112 DEFINE_REQ_FMT0("OST_DISCONNECT", empty, empty);
1113 EXPORT_SYMBOL(RQF_OST_DISCONNECT);
1115 const struct req_format RQF_OST_GETATTR =
1116 DEFINE_REQ_FMT0("OST_GETATTR", ost_body_capa, ost_body_only);
1117 EXPORT_SYMBOL(RQF_OST_GETATTR);
1119 const struct req_format RQF_OST_SETATTR =
1120 DEFINE_REQ_FMT0("OST_SETATTR", ost_body_capa, ost_body_only);
1121 EXPORT_SYMBOL(RQF_OST_SETATTR);
1123 const struct req_format RQF_OST_CREATE =
1124 DEFINE_REQ_FMT0("OST_CREATE", ost_body_only, ost_body_only);
1125 EXPORT_SYMBOL(RQF_OST_CREATE);
1127 const struct req_format RQF_OST_PUNCH =
1128 DEFINE_REQ_FMT0("OST_PUNCH", ost_body_capa, ost_body_only);
1129 EXPORT_SYMBOL(RQF_OST_PUNCH);
1131 const struct req_format RQF_OST_SYNC =
1132 DEFINE_REQ_FMT0("OST_SYNC", ost_body_capa, ost_body_only);
1133 EXPORT_SYMBOL(RQF_OST_SYNC);
1135 const struct req_format RQF_OST_DESTROY =
1136 DEFINE_REQ_FMT0("OST_DESTROY", ost_destroy_client, ost_body_only);
1137 EXPORT_SYMBOL(RQF_OST_DESTROY);
1139 const struct req_format RQF_OST_BRW =
1140 DEFINE_REQ_FMT0("OST_BRW", ost_brw_client, ost_brw_server);
1141 EXPORT_SYMBOL(RQF_OST_BRW);
1143 const struct req_format RQF_OST_STATFS =
1144 DEFINE_REQ_FMT0("OST_STATFS", empty, obd_statfs_server);
1145 EXPORT_SYMBOL(RQF_OST_STATFS);
1147 const struct req_format RQF_OST_SET_INFO =
1148 DEFINE_REQ_FMT0("OST_SET_INFO", ost_set_info_client, empty);
1149 EXPORT_SYMBOL(RQF_OST_SET_INFO);
1151 const struct req_format RQF_OST_GET_INFO_GENERIC =
1152 DEFINE_REQ_FMT0("OST_GET_INFO", ost_get_info_generic_client,
1153 ost_get_info_generic_server);
1154 EXPORT_SYMBOL(RQF_OST_GET_INFO_GENERIC);
1156 const struct req_format RQF_OST_GET_INFO_LAST_ID =
1157 DEFINE_REQ_FMT0("OST_GET_INFO_LAST_ID", ost_get_info_generic_client,
1158 ost_get_last_id_server);
1159 EXPORT_SYMBOL(RQF_OST_GET_INFO_LAST_ID);
1162 #if !defined(__REQ_LAYOUT_USER__)
1164 int req_layout_init(void)
1170 for (i = 0; i < ARRAY_SIZE(req_formats); ++i) {
1171 struct req_format *rf;
1173 rf = (struct req_format *)req_formats[i];
1175 for (j = 0; j < RCL_NR; ++j) {
1176 LASSERT(rf->rf_fields[j].nr <= REQ_MAX_FIELD_NR);
1177 for (k = 0; k < rf->rf_fields[j].nr; ++k) {
1178 struct req_msg_field *field;
1180 field = (typeof(field))rf->rf_fields[j].d[k];
1181 LASSERT(field->rmf_offset[i][j] == 0);
1183 * k + 1 to detect unused format/field
1186 field->rmf_offset[i][j] = k + 1;
1192 EXPORT_SYMBOL(req_layout_init);
1194 void req_layout_fini(void)
1197 EXPORT_SYMBOL(req_layout_fini);
1199 void req_capsule_init_area(struct req_capsule *pill)
1203 for (i = 0; i < ARRAY_SIZE(pill->rc_area[RCL_CLIENT]); i++) {
1204 pill->rc_area[RCL_CLIENT][i] = -1;
1205 pill->rc_area[RCL_SERVER][i] = -1;
1208 EXPORT_SYMBOL(req_capsule_init_area);
1211 * Initialize capsule.
1213 * @area is an array of REQ_MAX_FIELD_NR elements, used to store sizes of
1214 * variable-sized fields.
1216 void req_capsule_init(struct req_capsule *pill,
1217 struct ptlrpc_request *req,
1218 enum req_location location)
1220 LASSERT(location == RCL_SERVER || location == RCL_CLIENT);
1222 memset(pill, 0, sizeof *pill);
1224 pill->rc_loc = location;
1225 req_capsule_init_area(pill);
1227 EXPORT_SYMBOL(req_capsule_init);
1229 void req_capsule_fini(struct req_capsule *pill)
1232 EXPORT_SYMBOL(req_capsule_fini);
1234 static int __req_format_is_sane(const struct req_format *fmt)
1237 0 <= fmt->rf_idx && fmt->rf_idx < ARRAY_SIZE(req_formats) &&
1238 req_formats[fmt->rf_idx] == fmt;
1241 static struct lustre_msg *__req_msg(const struct req_capsule *pill,
1242 enum req_location loc)
1244 struct ptlrpc_request *req;
1247 return loc == RCL_CLIENT ? req->rq_reqmsg : req->rq_repmsg;
1250 void req_capsule_set(struct req_capsule *pill, const struct req_format *fmt)
1252 LASSERT(pill->rc_fmt == NULL);
1253 LASSERT(__req_format_is_sane(fmt));
1257 EXPORT_SYMBOL(req_capsule_set);
1259 int req_capsule_filled_sizes(struct req_capsule *pill,
1260 enum req_location loc)
1262 const struct req_format *fmt = pill->rc_fmt;
1265 LASSERT(fmt != NULL);
1267 for (i = 0; i < fmt->rf_fields[loc].nr; ++i) {
1268 if (pill->rc_area[loc][i] == -1) {
1269 pill->rc_area[loc][i] =
1270 fmt->rf_fields[loc].d[i]->rmf_size;
1271 if (pill->rc_area[loc][i] == -1) {
1272 /* skip the following fields */
1273 LASSERT(loc != RCL_SERVER);
1280 EXPORT_SYMBOL(req_capsule_filled_sizes);
1282 int req_capsule_server_pack(struct req_capsule *pill)
1284 const struct req_format *fmt;
1288 LASSERT(pill->rc_loc == RCL_SERVER);
1290 LASSERT(fmt != NULL);
1292 count = req_capsule_filled_sizes(pill, RCL_SERVER);
1293 rc = lustre_pack_reply(pill->rc_req, count,
1294 pill->rc_area[RCL_SERVER], NULL);
1296 DEBUG_REQ(D_ERROR, pill->rc_req,
1297 "Cannot pack %d fields in format `%s': ",
1298 count, fmt->rf_name);
1302 EXPORT_SYMBOL(req_capsule_server_pack);
1304 static int __req_capsule_offset(const struct req_capsule *pill,
1305 const struct req_msg_field *field,
1306 enum req_location loc)
1310 offset = field->rmf_offset[pill->rc_fmt->rf_idx][loc];
1311 LASSERTF(offset > 0, "%s:%s, off=%d, loc=%d\n",
1312 pill->rc_fmt->rf_name,
1313 field->rmf_name, offset, loc);
1315 LASSERT(0 <= offset && offset < (sizeof(pill->rc_swabbed) << 3));
1319 static void *__req_capsule_get(struct req_capsule *pill,
1320 const struct req_msg_field *field,
1321 enum req_location loc,
1322 void (*swabber)( void *))
1324 const struct req_format *fmt;
1325 struct lustre_msg *msg;
1330 void *(*getter)(struct lustre_msg *m, int n, int minlen);
1332 static const char *rcl_names[RCL_NR] = {
1333 [RCL_CLIENT] = "client",
1334 [RCL_SERVER] = "server"
1338 LASSERT(fmt != NULL);
1339 LASSERT(__req_format_is_sane(fmt));
1341 offset = __req_capsule_offset(pill, field, loc);
1343 msg = __req_msg(pill, loc);
1344 LASSERT(msg != NULL);
1346 getter = (field->rmf_flags & RMF_F_STRING) ?
1347 (typeof(getter))lustre_msg_string : lustre_msg_buf;
1349 if (pill->rc_area[loc][offset] != -1)
1350 len = pill->rc_area[loc][offset];
1352 len = max(field->rmf_size, 0);
1353 value = getter(msg, offset, len);
1355 swabber = swabber ?: field->rmf_swabber;
1356 if (!(pill->rc_swabbed & (1 << offset)) && loc != pill->rc_loc &&
1357 swabber != NULL && value != NULL &&
1358 lustre_msg_swabbed(msg)) {
1360 pill->rc_swabbed |= (1 << offset);
1362 if (value == NULL) {
1363 DEBUG_REQ(D_ERROR, pill->rc_req,
1364 "Wrong buffer for field `%s' (%d of %d) "
1365 "in format `%s': %d vs. %d (%s)\n",
1366 field->rmf_name, offset, lustre_msg_bufcount(msg), fmt->rf_name,
1367 lustre_msg_buflen(msg, offset), len,
1374 void *req_capsule_client_get(struct req_capsule *pill,
1375 const struct req_msg_field *field)
1377 return __req_capsule_get(pill, field, RCL_CLIENT, NULL);
1379 EXPORT_SYMBOL(req_capsule_client_get);
1381 void *req_capsule_client_swab_get(struct req_capsule *pill,
1382 const struct req_msg_field *field,
1383 void (*swabber)(void* ))
1385 return __req_capsule_get(pill, field, RCL_CLIENT, swabber);
1387 EXPORT_SYMBOL(req_capsule_client_swab_get);
1389 void *req_capsule_client_sized_get(struct req_capsule *pill,
1390 const struct req_msg_field *field,
1393 req_capsule_set_size(pill, field, RCL_CLIENT, len);
1394 return __req_capsule_get(pill, field, RCL_CLIENT, NULL);
1396 EXPORT_SYMBOL(req_capsule_client_sized_get);
1398 void *req_capsule_server_get(struct req_capsule *pill,
1399 const struct req_msg_field *field)
1401 return __req_capsule_get(pill, field, RCL_SERVER, NULL);
1403 EXPORT_SYMBOL(req_capsule_server_get);
1405 void *req_capsule_server_swab_get(struct req_capsule *pill,
1406 const struct req_msg_field *field,
1409 return __req_capsule_get(pill, field, RCL_SERVER, swabber);
1411 EXPORT_SYMBOL(req_capsule_server_swab_get);
1414 void *req_capsule_server_sized_get(struct req_capsule *pill,
1415 const struct req_msg_field *field,
1418 req_capsule_set_size(pill, field, RCL_SERVER, len);
1419 return __req_capsule_get(pill, field, RCL_SERVER, NULL);
1421 EXPORT_SYMBOL(req_capsule_server_sized_get);
1423 const void *req_capsule_other_get(struct req_capsule *pill,
1424 const struct req_msg_field *field)
1426 return __req_capsule_get(pill, field, pill->rc_loc ^ 1, NULL);
1428 EXPORT_SYMBOL(req_capsule_other_get);
1430 void req_capsule_set_size(struct req_capsule *pill,
1431 const struct req_msg_field *field,
1432 enum req_location loc, int size)
1434 LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
1436 pill->rc_area[loc][__req_capsule_offset(pill, field, loc)] = size;
1438 EXPORT_SYMBOL(req_capsule_set_size);
1440 /* NB: this function doesn't correspond with req_capsule_set_size(), which
1441 * actually sets the size in pill.rc_area[loc][offset], but this function
1442 * returns the message buflen[offset], maybe we should use another name.
1444 int req_capsule_get_size(const struct req_capsule *pill,
1445 const struct req_msg_field *field,
1446 enum req_location loc)
1448 LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
1450 return lustre_msg_buflen(__req_msg(pill, loc),
1451 __req_capsule_offset(pill, field, loc));
1453 EXPORT_SYMBOL(req_capsule_get_size);
1455 int req_capsule_msg_size(struct req_capsule *pill, enum req_location loc)
1457 return lustre_msg_size(pill->rc_req->rq_import->imp_msg_magic,
1458 pill->rc_fmt->rf_fields[loc].nr,
1459 pill->rc_area[loc]);
1462 int req_capsule_fmt_size(__u32 magic, const struct req_format *fmt,
1463 enum req_location loc)
1467 size = lustre_msg_hdr_size(magic, fmt->rf_fields[loc].nr);
1471 for (; i < fmt->rf_fields[loc].nr; ++i)
1472 if (fmt->rf_fields[loc].d[i]->rmf_size != -1)
1473 size += size_round(fmt->rf_fields[loc].d[i]->rmf_size);
1477 #define FMT_FIELD(fmt, i, j) (fmt)->rf_fields[(i)].d[(j)]
1479 void req_capsule_extend(struct req_capsule *pill, const struct req_format *fmt)
1484 const struct req_format *old;
1486 LASSERT(pill->rc_fmt != NULL);
1487 LASSERT(__req_format_is_sane(fmt));
1491 * Sanity checking...
1493 for (i = 0; i < RCL_NR; ++i) {
1494 LASSERT(fmt->rf_fields[i].nr >= old->rf_fields[i].nr);
1495 for (j = 0; j < old->rf_fields[i].nr - 1; ++j) {
1496 LASSERT(FMT_FIELD(fmt, i, j) == FMT_FIELD(old, i, j));
1499 * Last field in old format can be shorter than in new.
1501 LASSERT(FMT_FIELD(fmt, i, j)->rmf_size >=
1502 FMT_FIELD(old, i, j)->rmf_size);
1504 /* last field should be returned to the unswabbed state */
1505 pill->rc_swabbed &= ~(__u32)(1 << j);
1508 EXPORT_SYMBOL(req_capsule_extend);
1510 int req_capsule_has_field(const struct req_capsule *pill,
1511 const struct req_msg_field *field,
1512 enum req_location loc)
1514 LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
1516 return field->rmf_offset[pill->rc_fmt->rf_idx][loc];
1518 EXPORT_SYMBOL(req_capsule_has_field);
1520 int req_capsule_field_present(const struct req_capsule *pill,
1521 const struct req_msg_field *field,
1522 enum req_location loc)
1526 LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
1527 LASSERT(req_capsule_has_field(pill, field, loc));
1529 offset = __req_capsule_offset(pill, field, loc);
1530 return lustre_msg_bufcount(__req_msg(pill, loc)) > offset;
1532 EXPORT_SYMBOL(req_capsule_field_present);
1534 void req_capsule_shrink(struct req_capsule *pill,
1535 const struct req_msg_field *field,
1536 unsigned int newlen,
1537 enum req_location loc)
1539 const struct req_format *fmt;
1540 struct lustre_msg *msg;
1545 LASSERT(fmt != NULL);
1546 LASSERT(__req_format_is_sane(fmt));
1547 LASSERT(req_capsule_has_field(pill, field, loc));
1548 LASSERT(req_capsule_field_present(pill, field, loc));
1550 offset = __req_capsule_offset(pill, field, loc);
1552 msg = __req_msg(pill, loc);
1553 len = lustre_msg_buflen(msg, offset);
1554 LASSERTF(newlen <= len, "%s:%s, oldlen=%d, newlen=%d\n",
1555 fmt->rf_name, field->rmf_name, len, newlen);
1557 if (loc == RCL_CLIENT)
1558 pill->rc_req->rq_reqlen = lustre_shrink_msg(msg, offset, newlen,
1561 pill->rc_req->rq_replen = lustre_shrink_msg(msg, offset, newlen,
1564 EXPORT_SYMBOL(req_capsule_shrink);
1566 /* __REQ_LAYOUT_USER__ */