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  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #ifndef EXPORT_SYMTAB
  38 # define EXPORT_SYMTAB
  39 #endif
  40 #define DEBUG_SUBSYSTEM S_SEC
  41 #ifdef __KERNEL__
  42 #include <linux/init.h>
  43 #include <linux/module.h>
  44 #include <linux/slab.h>
  45 #include <linux/dcache.h>
  46 #include <linux/fs.h>
  47 #include <linux/random.h>
  48 #include <linux/mutex.h>
  49 #else
  50 #include <liblustre.h>
  51 #endif
  52
  53 #include <obd.h>
  54 #include <obd_class.h>
  55 #include <obd_support.h>
  56 #include <lustre/lustre_idl.h>
  57 #include <lustre_net.h>
  58 #include <lustre_import.h>
  59 #include <lprocfs_status.h>
  60 #include <lustre_sec.h>
  61
  62 #include "gss_err.h"
  63 #include "gss_internal.h"
  64 #include "gss_api.h"
  65
  66 static struct proc_dir_entry *gss_proc_root = NULL;
  67
  68 /*
  69  * statistic of "out-of-sequence-window"
  70  */
  71 static struct {
  72         spinlock_t      oos_lock;
  73         atomic_t        oos_cli_count;       /* client occurrence */
  74         int             oos_cli_behind;      /* client max seqs behind */
  75         atomic_t        oos_svc_replay[3];   /* server replay detected */
  76         atomic_t        oos_svc_pass[3];     /* server verified ok */
  77 } gss_stat_oos = {
  78         .oos_lock       = SPIN_LOCK_UNLOCKED,
  79         .oos_cli_count  = ATOMIC_INIT(0),
  80         .oos_cli_behind = 0,
  81         .oos_svc_replay = { ATOMIC_INIT(0), },
  82         .oos_svc_pass   = { ATOMIC_INIT(0), },
  83 };
  84
  85 void gss_stat_oos_record_cli(int behind)
  86 {
  87         atomic_inc(&gss_stat_oos.oos_cli_count);
  88
  89         spin_lock(&gss_stat_oos.oos_lock);
  90         if (behind > gss_stat_oos.oos_cli_behind)
  91                 gss_stat_oos.oos_cli_behind = behind;
  92         spin_unlock(&gss_stat_oos.oos_lock);
  93 }
  94
  95 void gss_stat_oos_record_svc(int phase, int replay)
  96 {
  97         LASSERT(phase >= 0 && phase <= 2);
  98
  99         if (replay)
 100                 atomic_inc(&gss_stat_oos.oos_svc_replay[phase]);
 101         else
 102                 atomic_inc(&gss_stat_oos.oos_svc_pass[phase]);
 103 }
 104
 105 static int gss_proc_read_oos(char *page, char **start, off_t off, int count,
 106                              int *eof, void *data)
 107 {
 108         int written;
 109
 110         written = snprintf(page, count,
 111                         "seqwin:                %u\n"
 112                         "backwin:               %u\n"
 113                         "client fall behind seqwin\n"
 114                         "  occurrence:          %d\n"
 115                         "  max seq behind:      %d\n"
 116                         "server replay detected:\n"
 117                         "  phase 0:             %d\n"
 118                         "  phase 1:             %d\n"
 119                         "  phase 2:             %d\n"
 120                         "server verify ok:\n"
 121                         "  phase 2:             %d\n",
 122                         GSS_SEQ_WIN_MAIN,
 123                         GSS_SEQ_WIN_BACK,
 124                         atomic_read(&gss_stat_oos.oos_cli_count),
 125                         gss_stat_oos.oos_cli_behind,
 126                         atomic_read(&gss_stat_oos.oos_svc_replay[0]),
 127                         atomic_read(&gss_stat_oos.oos_svc_replay[1]),
 128                         atomic_read(&gss_stat_oos.oos_svc_replay[2]),
 129                         atomic_read(&gss_stat_oos.oos_svc_pass[2]));
 130
 131         return written;
 132 }
 133
 134 static int gss_proc_write_secinit(struct file *file, const char *buffer,
 135                                   unsigned long count, void *data)
 136 {
 137         int rc;
 138
 139         rc = gss_do_ctx_init_rpc((char *) buffer, count);
 140         if (rc) {
 141                 LASSERT(rc < 0);
 142                 return rc;
 143         }
 144
 145         return ((int) count);
 146 }
 147
 148 static struct lprocfs_vars gss_lprocfs_vars[] = {
 149         { "replays", gss_proc_read_oos, NULL },
 150         { "init_channel", NULL, gss_proc_write_secinit, NULL },
 151         { NULL }
 152 };
 153
 154 int gss_init_lproc(void)
 155 {
 156         struct proc_dir_entry  *ent;
 157         int                     rc;
 158
 159         gss_proc_root = lprocfs_register("gss", sptlrpc_proc_root,
 160                                          gss_lprocfs_vars, NULL);
 161
 162         if (IS_ERR(gss_proc_root)) {
 163                 rc = PTR_ERR(gss_proc_root);
 164                 gss_proc_root = NULL;
 165                 CERROR("failed to initialize lproc entries: %d\n", rc);
 166                 return rc;
 167         }
 168
 169         /* FIXME
 170          * here we should hold proc_subdir_lock which is not exported
 171          */
 172         ent = gss_proc_root->subdir;
 173         while (ent != NULL) {
 174                 if (strcmp(ent->name, "init_channel") == 0) {
 175                         ent->mode |= 0222;
 176                         break;
 177                 }
 178         }
 179
 180         return 0;
 181 }
 182
 183 void gss_exit_lproc(void)
 184 {
 185         if (gss_proc_root) {
 186                 lprocfs_remove(&gss_proc_root);
 187                 gss_proc_root = NULL;
 188         }
 189 }