lustre/ptlrpc/gss/lproc_gss.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2001-2003 Cluster File Systems, Inc.
   5  *   Author Peter Braam <braam@clusterfs.com>
   6  *
   7  *   This file is part of the Lustre file system, http://www.lustre.org
   8  *   Lustre is a trademark of Cluster File Systems, Inc.
   9  *
  10  *   You may have signed or agreed to another license before downloading
  11  *   this software.  If so, you are bound by the terms and conditions
  12  *   of that agreement, and the following does not apply to you.  See the
  13  *   LICENSE file included with this distribution for more information.
  14  *
  15  *   If you did not agree to a different license, then this copy of Lustre
  16  *   is open source software; you can redistribute it and/or modify it
  17  *   under the terms of version 2 of the GNU General Public License as
  18  *   published by the Free Software Foundation.
  19  *
  20  *   In either case, Lustre is distributed in the hope that it will be
  21  *   useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  22  *   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  *   license text for more details.
  24  *
  25  */
  26
  27 #ifndef EXPORT_SYMTAB
  28 # define EXPORT_SYMTAB
  29 #endif
  30 #define DEBUG_SUBSYSTEM S_SEC
  31 #ifdef __KERNEL__
  32 #include <linux/init.h>
  33 #include <linux/module.h>
  34 #include <linux/slab.h>
  35 #include <linux/dcache.h>
  36 #include <linux/fs.h>
  37 #include <linux/random.h>
  38 #else
  39 #include <liblustre.h>
  40 #endif
  41
  42 #include <obd.h>
  43 #include <obd_class.h>
  44 #include <obd_support.h>
  45 #include <lustre/lustre_idl.h>
  46 #include <lustre_net.h>
  47 #include <lustre_import.h>
  48 #include <lprocfs_status.h>
  49 #include <lustre_sec.h>
  50
  51 #include "gss_err.h"
  52 #include "gss_internal.h"
  53 #include "gss_api.h"
  54
  55 static struct proc_dir_entry *gss_proc_root = NULL;
  56
  57 /*
  58  * statistic of "out-of-sequence-window"
  59  */
  60 static struct {
  61         spinlock_t      oos_lock;
  62         atomic_t        oos_cli_count;       /* client occurrence */
  63         int             oos_cli_behind;      /* client max seqs behind */
  64         atomic_t        oos_svc_replay[3];   /* server replay detected */
  65         atomic_t        oos_svc_pass[3];     /* server verified ok */
  66 } gss_stat_oos = {
  67         .oos_lock       = SPIN_LOCK_UNLOCKED,
  68         .oos_cli_count  = ATOMIC_INIT(0),
  69         .oos_cli_behind = 0,
  70         .oos_svc_replay = { ATOMIC_INIT(0), },
  71         .oos_svc_pass   = { ATOMIC_INIT(0), },
  72 };
  73
  74 void gss_stat_oos_record_cli(int behind)
  75 {
  76         atomic_inc(&gss_stat_oos.oos_cli_count);
  77
  78         spin_lock(&gss_stat_oos.oos_lock);
  79         if (behind > gss_stat_oos.oos_cli_behind)
  80                 gss_stat_oos.oos_cli_behind = behind;
  81         spin_unlock(&gss_stat_oos.oos_lock);
  82 }
  83
  84 void gss_stat_oos_record_svc(int phase, int replay)
  85 {
  86         LASSERT(phase >= 0 && phase <= 2);
  87
  88         if (replay)
  89                 atomic_inc(&gss_stat_oos.oos_svc_replay[phase]);
  90         else
  91                 atomic_inc(&gss_stat_oos.oos_svc_pass[phase]);
  92 }
  93
  94 static int gss_proc_read_oos(char *page, char **start, off_t off, int count,
  95                              int *eof, void *data)
  96 {
  97         int written;
  98
  99         written = snprintf(page, count,
 100                         "seqwin:                %u\n"
 101                         "backwin:               %u\n"
 102                         "client fall behind seqwin\n"
 103                         "  occurrence:          %d\n"
 104                         "  max seq behind:      %d\n"
 105                         "server replay detected:\n"
 106                         "  phase 0:             %d\n"
 107                         "  phase 1:             %d\n"
 108                         "  phase 2:             %d\n"
 109                         "server verify ok:\n"
 110                         "  phase 2:             %d\n",
 111                         GSS_SEQ_WIN_MAIN,
 112                         GSS_SEQ_WIN_BACK,
 113                         atomic_read(&gss_stat_oos.oos_cli_count),
 114                         gss_stat_oos.oos_cli_behind,
 115                         atomic_read(&gss_stat_oos.oos_svc_replay[0]),
 116                         atomic_read(&gss_stat_oos.oos_svc_replay[1]),
 117                         atomic_read(&gss_stat_oos.oos_svc_replay[2]),
 118                         atomic_read(&gss_stat_oos.oos_svc_pass[2]));
 119
 120         return written;
 121 }
 122
 123 static int gss_proc_write_secinit(struct file *file, const char *buffer,
 124                                   unsigned long count, void *data)
 125 {
 126         int rc;
 127
 128         rc = gss_do_ctx_init_rpc((char *) buffer, count);
 129         if (rc) {
 130                 LASSERT(rc < 0);
 131                 return rc;
 132         }
 133
 134         return ((int) count);
 135 }
 136
 137 static struct lprocfs_vars gss_lprocfs_vars[] = {
 138         { "replays", gss_proc_read_oos, NULL },
 139         { "init_channel", NULL, gss_proc_write_secinit, NULL },
 140         { NULL }
 141 };
 142
 143 int gss_init_lproc(void)
 144 {
 145         int rc;
 146         gss_proc_root = lprocfs_register("gss", sptlrpc_proc_root,
 147                                          gss_lprocfs_vars, NULL);
 148
 149         if (IS_ERR(gss_proc_root)) {
 150                 rc = PTR_ERR(gss_proc_root);
 151                 gss_proc_root = NULL;
 152                 CERROR("failed to initialize lproc entries: %d\n", rc);
 153                 return rc;
 154         }
 155
 156         return 0;
 157 }
 158
 159 void gss_exit_lproc(void)
 160 {
 161         if (gss_proc_root) {
 162                 lprocfs_remove(&gss_proc_root);
 163                 gss_proc_root = NULL;
 164         }
 165 }