lustre/ptlrpc/gss/lproc_gss.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   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.
   9  *
  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).
  15  *
  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
  19  *
  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
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  */
  30 /*
  31  * This file is part of Lustre, http://www.lustre.org/
  32  * Lustre is a trademark of Sun Microsystems, Inc.
  33  */
  34
  35 #define DEBUG_SUBSYSTEM S_SEC
  36 #ifdef __KERNEL__
  37 #include <linux/init.h>
  38 #include <linux/module.h>
  39 #include <linux/slab.h>
  40 #include <linux/dcache.h>
  41 #include <linux/fs.h>
  42 #include <linux/mutex.h>
  43 #else
  44 #include <liblustre.h>
  45 #endif
  46
  47 #include <obd.h>
  48 #include <obd_class.h>
  49 #include <obd_support.h>
  50 #include <lustre/lustre_idl.h>
  51 #include <lustre_net.h>
  52 #include <lustre_import.h>
  53 #include <lprocfs_status.h>
  54 #include <lustre_sec.h>
  55
  56 #include "gss_err.h"
  57 #include "gss_internal.h"
  58 #include "gss_api.h"
  59
  60 static struct proc_dir_entry *gss_proc_root = NULL;
  61 static struct proc_dir_entry *gss_proc_lk = NULL;
  62
  63 /*
  64  * statistic of "out-of-sequence-window"
  65  */
  66 static struct {
  67         spinlock_t  oos_lock;
  68         cfs_atomic_t    oos_cli_count;       /* client occurrence */
  69         int             oos_cli_behind;      /* client max seqs behind */
  70         cfs_atomic_t    oos_svc_replay[3];   /* server replay detected */
  71         cfs_atomic_t    oos_svc_pass[3];     /* server verified ok */
  72 } gss_stat_oos = {
  73         .oos_cli_count  = CFS_ATOMIC_INIT(0),
  74         .oos_cli_behind = 0,
  75         .oos_svc_replay = { CFS_ATOMIC_INIT(0), },
  76         .oos_svc_pass   = { CFS_ATOMIC_INIT(0), },
  77 };
  78
  79 void gss_stat_oos_record_cli(int behind)
  80 {
  81         cfs_atomic_inc(&gss_stat_oos.oos_cli_count);
  82
  83         spin_lock(&gss_stat_oos.oos_lock);
  84         if (behind > gss_stat_oos.oos_cli_behind)
  85                 gss_stat_oos.oos_cli_behind = behind;
  86         spin_unlock(&gss_stat_oos.oos_lock);
  87 }
  88
  89 void gss_stat_oos_record_svc(int phase, int replay)
  90 {
  91         LASSERT(phase >= 0 && phase <= 2);
  92
  93         if (replay)
  94                 cfs_atomic_inc(&gss_stat_oos.oos_svc_replay[phase]);
  95         else
  96                 cfs_atomic_inc(&gss_stat_oos.oos_svc_pass[phase]);
  97 }
  98
  99 static int gss_proc_read_oos(char *page, char **start, off_t off, int count,
 100                              int *eof, void *data)
 101 {
 102         int written;
 103
 104         written = snprintf(page, count,
 105                         "seqwin:                %u\n"
 106                         "backwin:               %u\n"
 107                         "client fall behind seqwin\n"
 108                         "  occurrence:          %d\n"
 109                         "  max seq behind:      %d\n"
 110                         "server replay detected:\n"
 111                         "  phase 0:             %d\n"
 112                         "  phase 1:             %d\n"
 113                         "  phase 2:             %d\n"
 114                         "server verify ok:\n"
 115                         "  phase 2:             %d\n",
 116                         GSS_SEQ_WIN_MAIN,
 117                         GSS_SEQ_WIN_BACK,
 118                         cfs_atomic_read(&gss_stat_oos.oos_cli_count),
 119                         gss_stat_oos.oos_cli_behind,
 120                         cfs_atomic_read(&gss_stat_oos.oos_svc_replay[0]),
 121                         cfs_atomic_read(&gss_stat_oos.oos_svc_replay[1]),
 122                         cfs_atomic_read(&gss_stat_oos.oos_svc_replay[2]),
 123                         cfs_atomic_read(&gss_stat_oos.oos_svc_pass[2]));
 124
 125         return written;
 126 }
 127
 128 static int gss_proc_write_secinit(struct file *file, const char *buffer,
 129                                   unsigned long count, void *data)
 130 {
 131         int rc;
 132
 133         rc = gss_do_ctx_init_rpc((char *) buffer, count);
 134         if (rc) {
 135                 LASSERT(rc < 0);
 136                 return rc;
 137         }
 138
 139         return ((int) count);
 140 }
 141
 142 static struct lprocfs_vars gss_lprocfs_vars[] = {
 143         { "replays", gss_proc_read_oos, NULL },
 144         { "init_channel", NULL, gss_proc_write_secinit, NULL, NULL, 0222 },
 145         { NULL }
 146 };
 147
 148 /*
 149  * for userspace helper lgss_keyring.
 150  *
 151  * debug_level: [0, 4], defined in utils/gss/lgss_utils.h
 152  */
 153 static int gss_lk_debug_level = 1;
 154
 155 static int gss_lk_proc_read_dl(char *page, char **start, off_t off,
 156                                int count, int *eof, void *data)
 157 {
 158         return snprintf(page, count, "%u\n", gss_lk_debug_level);
 159 }
 160
 161 static int gss_lk_proc_write_dl(struct file *file, const char *buffer,
 162                                 unsigned long count, void *data)
 163 {
 164         int     val, rc;
 165
 166         rc = lprocfs_write_helper(buffer, count, &val);
 167         if (rc < 0)
 168                 return rc;
 169
 170         if (val < 0 || val > 4)
 171                 return -ERANGE;
 172
 173         gss_lk_debug_level = val;
 174         return count;
 175 }
 176
 177 static struct lprocfs_vars gss_lk_lprocfs_vars[] = {
 178         { "debug_level", gss_lk_proc_read_dl, gss_lk_proc_write_dl, NULL },
 179         { NULL }
 180 };
 181
 182 void gss_exit_lproc(void)
 183 {
 184         if (gss_proc_lk) {
 185                 lprocfs_remove(&gss_proc_lk);
 186                 gss_proc_lk = NULL;
 187         }
 188
 189         if (gss_proc_root) {
 190                 lprocfs_remove(&gss_proc_root);
 191                 gss_proc_root = NULL;
 192         }
 193 }
 194
 195 int gss_init_lproc(void)
 196 {
 197         int     rc;
 198
 199         spin_lock_init(&gss_stat_oos.oos_lock);
 200
 201         gss_proc_root = lprocfs_register("gss", sptlrpc_proc_root,
 202                                          gss_lprocfs_vars, NULL);
 203         if (IS_ERR(gss_proc_root)) {
 204                 gss_proc_root = NULL;
 205                 GOTO(err_out, rc = PTR_ERR(gss_proc_root));
 206         }
 207
 208         gss_proc_lk = lprocfs_register("lgss_keyring", gss_proc_root,
 209                                        gss_lk_lprocfs_vars, NULL);
 210         if (IS_ERR(gss_proc_lk)) {
 211                 gss_proc_lk = NULL;
 212                 GOTO(err_out, rc = PTR_ERR(gss_proc_root));
 213         }
 214
 215         return 0;
 216
 217 err_out:
 218         CERROR("failed to initialize gss lproc entries: %d\n", rc);
 219         gss_exit_lproc();
 220         return rc;
 221 }