lustre/ptlrpc/ptlrpc_internal.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2003 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of the Lustre file system, http://www.lustre.org
   7  *   Lustre is a trademark of Cluster File Systems, Inc.
   8  *
   9  *   You may have signed or agreed to another license before downloading
  10  *   this software.  If so, you are bound by the terms and conditions
  11  *   of that agreement, and the following does not apply to you.  See the
  12  *   LICENSE file included with this distribution for more information.
  13  *
  14  *   If you did not agree to a different license, then this copy of Lustre
  15  *   is open source software; you can redistribute it and/or modify it
  16  *   under the terms of version 2 of the GNU General Public License as
  17  *   published by the Free Software Foundation.
  18  *
  19  *   In either case, Lustre is distributed in the hope that it will be
  20  *   useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  21  *   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  *   license text for more details.
  23  *
  24  */
  25
  26 /* Intramodule declarations for ptlrpc. */
  27
  28 #ifndef PTLRPC_INTERNAL_H
  29 #define PTLRPC_INTERNAL_H
  30
  31 #include "../ldlm/ldlm_internal.h"
  32
  33 struct ldlm_namespace;
  34 struct obd_import;
  35 struct ldlm_res_id;
  36 struct ptlrpc_request_set;
  37 extern int test_req_buffer_pressure;
  38
  39 void ptlrpc_request_handle_notconn(struct ptlrpc_request *);
  40 void lustre_assert_wire_constants(void);
  41 int ptlrpc_import_in_recovery(struct obd_import *imp);
  42 int ptlrpc_set_import_discon(struct obd_import *imp, __u32 conn_cnt);
  43 void ptlrpc_handle_failed_import(struct obd_import *imp);
  44 int ptlrpc_replay_next(struct obd_import *imp, int *inflight);
  45 void ptlrpc_initiate_recovery(struct obd_import *imp);
  46
  47 int lustre_unpack_req_ptlrpc_body(struct ptlrpc_request *req, int offset);
  48 int lustre_unpack_rep_ptlrpc_body(struct ptlrpc_request *req, int offset);
  49
  50
  51 #ifdef LPROCFS
  52 void ptlrpc_lprocfs_register_service(struct proc_dir_entry *proc_entry,
  53                                      struct ptlrpc_service *svc);
  54 void ptlrpc_lprocfs_unregister_service(struct ptlrpc_service *svc);
  55 void ptlrpc_lprocfs_rpc_sent(struct ptlrpc_request *req);
  56 void ptlrpc_lprocfs_do_request_stat (struct ptlrpc_request *req,
  57                                      long q_usec, long work_usec);
  58 #else
  59 #define ptlrpc_lprocfs_register_service(params...) do{}while(0)
  60 #define ptlrpc_lprocfs_unregister_service(params...) do{}while(0)
  61 #define ptlrpc_lprocfs_rpc_sent(params...) do{}while(0)
  62 #define ptlrpc_lprocfs_do_request_stat(params...) do{}while(0)
  63 #endif /* LPROCFS */
  64
  65 /* recovd_thread.c */
  66
  67 static inline int opcode_offset(__u32 opc) {
  68         if (opc < OST_LAST_OPC) {
  69                  /* OST opcode */
  70                 return (opc - OST_FIRST_OPC);
  71         } else if (opc < MDS_LAST_OPC) {
  72                 /* MDS opcode */
  73                 return (opc - MDS_FIRST_OPC +
  74                         (OST_LAST_OPC - OST_FIRST_OPC));
  75         } else if (opc < LDLM_LAST_OPC) {
  76                 /* LDLM Opcode */
  77                 return (opc - LDLM_FIRST_OPC +
  78                         (MDS_LAST_OPC - MDS_FIRST_OPC) +
  79                         (OST_LAST_OPC - OST_FIRST_OPC));
  80         } else if (opc < MGS_LAST_OPC) {
  81                 /* MGS Opcode */
  82                 return (opc - MGS_FIRST_OPC +
  83                         (LDLM_LAST_OPC - LDLM_FIRST_OPC) +
  84                         (MDS_LAST_OPC - MDS_FIRST_OPC) +
  85                         (OST_LAST_OPC - OST_FIRST_OPC));
  86         } else if (opc < OBD_LAST_OPC) {
  87                 /* OBD Ping */
  88                 return (opc - OBD_FIRST_OPC +
  89                         (MGS_LAST_OPC - MGS_FIRST_OPC) +
  90                         (LDLM_LAST_OPC - LDLM_FIRST_OPC) +
  91                         (MDS_LAST_OPC - MDS_FIRST_OPC) +
  92                         (OST_LAST_OPC - OST_FIRST_OPC));
  93         } else if (opc < LLOG_LAST_OPC) {
  94                 /* LLOG Opcode */
  95                 return (opc - LLOG_FIRST_OPC +
  96                         (OBD_LAST_OPC - OBD_FIRST_OPC) +
  97                         (MGS_LAST_OPC - MGS_FIRST_OPC) +
  98                         (LDLM_LAST_OPC - LDLM_FIRST_OPC) +
  99                         (MDS_LAST_OPC - MDS_FIRST_OPC) +
 100                         (OST_LAST_OPC - OST_FIRST_OPC));
 101         } else {
 102                 /* Unknown Opcode */
 103                 return -1;
 104         }
 105 }
 106
 107 #define LUSTRE_MAX_OPCODES ((OST_LAST_OPC - OST_FIRST_OPC)     + \
 108                             (MDS_LAST_OPC - MDS_FIRST_OPC)     + \
 109                             (LDLM_LAST_OPC - LDLM_FIRST_OPC)   + \
 110                             (MGS_LAST_OPC - MGS_FIRST_OPC)     + \
 111                             (OBD_LAST_OPC - OBD_FIRST_OPC)     + \
 112                             (LLOG_LAST_OPC - LLOG_FIRST_OPC))
 113
 114 enum {
 115         PTLRPC_REQWAIT_CNTR = 0,
 116         PTLRPC_REQQDEPTH_CNTR,
 117         PTLRPC_REQACTIVE_CNTR,
 118         PTLRPC_REQBUF_AVAIL_CNTR,
 119         PTLRPC_LAST_CNTR
 120 };
 121
 122 int ptlrpc_expire_one_request(struct ptlrpc_request *req);
 123
 124 /* pers.c */
 125 void ptlrpc_fill_bulk_md(lnet_md_t *md, struct ptlrpc_bulk_desc *desc);
 126 void ptlrpc_add_bulk_page(struct ptlrpc_bulk_desc *desc, cfs_page_t *page,
 127                           int pageoffset, int len);
 128 void ptl_rpc_wipe_bulk_pages(struct ptlrpc_bulk_desc *desc);
 129
 130 /* pinger.c */
 131 int ptlrpc_start_pinger(void);
 132 int ptlrpc_stop_pinger(void);
 133 void ptlrpc_pinger_sending_on_import(struct obd_import *imp);
 134 void ptlrpc_pinger_wake_up(void);
 135 void ptlrpc_ping_import_soon(struct obd_import *imp);
 136 #ifdef __KERNEL__
 137 int ping_evictor_wake(struct obd_export *exp);
 138 #else
 139 #define ping_evictor_wake(exp)     1
 140 #endif
 141
 142 static inline int ptlrpc_recoverable_error(int rc)
 143 {
 144         return (rc == -ENOTCONN || rc == -ENODEV);
 145 }
 146 #endif /* PTLRPC_INTERNAL_H */