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  * Copyright (c) 2012, Intel Corporation.
  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 #define DEBUG_SUBSYSTEM S_SEC
  38 #ifdef __KERNEL__
  39 #include <linux/init.h>
  40 #include <linux/module.h>
  41 #include <linux/slab.h>
  42 #include <linux/dcache.h>
  43 #include <linux/fs.h>
  44 #include <linux/mutex.h>
  45 #else
  46 #include <liblustre.h>
  47 #endif
  48
  49 #include <obd.h>
  50 #include <obd_class.h>
  51 #include <obd_support.h>
  52 #include <lustre/lustre_idl.h>
  53 #include <lustre_net.h>
  54 #include <lustre_import.h>
  55 #include <lprocfs_status.h>
  56 #include <lustre_sec.h>
  57
  58 #include "gss_err.h"
  59 #include "gss_internal.h"
  60 #include "gss_api.h"
  61
  62 static struct proc_dir_entry *gss_proc_root = NULL;
  63 static struct proc_dir_entry *gss_proc_lk = NULL;
  64
  65 /*
  66  * statistic of "out-of-sequence-window"
  67  */
  68 static struct {
  69         spinlock_t      oos_lock;
  70         atomic_t        oos_cli_count;          /* client occurrence */
  71         int             oos_cli_behind;         /* client max seqs behind */
  72         atomic_t        oos_svc_replay[3];      /* server replay detected */
  73         atomic_t        oos_svc_pass[3];        /* server verified ok */
  74 } gss_stat_oos = {
  75         .oos_cli_count  = ATOMIC_INIT(0),
  76         .oos_cli_behind = 0,
  77         .oos_svc_replay = { ATOMIC_INIT(0), },
  78         .oos_svc_pass   = { ATOMIC_INIT(0), },
  79 };
  80
  81 void gss_stat_oos_record_cli(int behind)
  82 {
  83         atomic_inc(&gss_stat_oos.oos_cli_count);
  84
  85         spin_lock(&gss_stat_oos.oos_lock);
  86         if (behind > gss_stat_oos.oos_cli_behind)
  87                 gss_stat_oos.oos_cli_behind = behind;
  88         spin_unlock(&gss_stat_oos.oos_lock);
  89 }
  90
  91 void gss_stat_oos_record_svc(int phase, int replay)
  92 {
  93         LASSERT(phase >= 0 && phase <= 2);
  94
  95         if (replay)
  96                 atomic_inc(&gss_stat_oos.oos_svc_replay[phase]);
  97         else
  98                 atomic_inc(&gss_stat_oos.oos_svc_pass[phase]);
  99 }
 100
 101 static int gss_proc_oos_seq_show(struct seq_file *m, void *v)
 102 {
 103         return seq_printf(m, "seqwin:              %u\n"
 104                           "backwin:             %u\n"
 105                           "client fall behind seqwin\n"
 106                           "  occurrence:        %d\n"
 107                           "  max seq behind:    %d\n"
 108                           "server replay detected:\n"
 109                           "  phase 0:           %d\n"
 110                           "  phase 1:           %d\n"
 111                           "  phase 2:           %d\n"
 112                           "server verify ok:\n"
 113                           "  phase 2:           %d\n",
 114                           GSS_SEQ_WIN_MAIN,
 115                           GSS_SEQ_WIN_BACK,
 116                           atomic_read(&gss_stat_oos.oos_cli_count),
 117                           gss_stat_oos.oos_cli_behind,
 118                           atomic_read(&gss_stat_oos.oos_svc_replay[0]),
 119                           atomic_read(&gss_stat_oos.oos_svc_replay[1]),
 120                           atomic_read(&gss_stat_oos.oos_svc_replay[2]),
 121                           atomic_read(&gss_stat_oos.oos_svc_pass[2]));
 122 }
 123 LPROC_SEQ_FOPS_RO(gss_proc_oos);
 124
 125 static ssize_t
 126 gss_proc_write_secinit(struct file *file, const char *buffer,
 127                                   size_t count, loff_t *off)
 128 {
 129         int rc;
 130
 131         rc = gss_do_ctx_init_rpc((char *) buffer, count);
 132         if (rc) {
 133                 LASSERT(rc < 0);
 134                 return rc;
 135         }
 136         return count;
 137 }
 138
 139 static const struct file_operations gss_proc_secinit = {
 140         .write = gss_proc_write_secinit,
 141 };
 142
 143 static struct lprocfs_seq_vars gss_lprocfs_vars[] = {
 144         { .name =       "replays",
 145           .fops =       &gss_proc_oos_fops      },
 146         { .name =       "init_channel",
 147           .fops =       &gss_proc_secinit,
 148           .proc_mode =  0222                    },
 149         { NULL }
 150 };
 151
 152 /*
 153  * for userspace helper lgss_keyring.
 154  *
 155  * debug_level: [0, 4], defined in utils/gss/lgss_utils.h
 156  */
 157 static int gss_lk_debug_level = 1;
 158
 159 static int gss_lk_proc_dl_seq_show(struct seq_file *m, void *v)
 160 {
 161         return seq_printf(m, "%u\n", gss_lk_debug_level);
 162 }
 163
 164 static ssize_t
 165 gss_lk_proc_dl_seq_write(struct file *file, const char *buffer,
 166                                 size_t count, loff_t *off)
 167 {
 168         int     val, rc;
 169
 170         rc = lprocfs_write_helper(buffer, count, &val);
 171         if (rc < 0)
 172                 return rc;
 173
 174         if (val < 0 || val > 4)
 175                 return -ERANGE;
 176
 177         gss_lk_debug_level = val;
 178         return count;
 179 }
 180 LPROC_SEQ_FOPS(gss_lk_proc_dl);
 181
 182 static struct lprocfs_seq_vars gss_lk_lprocfs_vars[] = {
 183         { .name =       "debug_level",
 184           .fops =       &gss_lk_proc_dl_fops    },
 185         { NULL }
 186 };
 187
 188 void gss_exit_lproc(void)
 189 {
 190         if (gss_proc_lk) {
 191                 lprocfs_remove(&gss_proc_lk);
 192                 gss_proc_lk = NULL;
 193         }
 194
 195         if (gss_proc_root) {
 196                 lprocfs_remove(&gss_proc_root);
 197                 gss_proc_root = NULL;
 198         }
 199 }
 200
 201 int gss_init_lproc(void)
 202 {
 203         int     rc;
 204
 205         spin_lock_init(&gss_stat_oos.oos_lock);
 206
 207         gss_proc_root = lprocfs_seq_register("gss", sptlrpc_proc_root,
 208                                                 gss_lprocfs_vars, NULL);
 209         if (IS_ERR(gss_proc_root)) {
 210                 rc = PTR_ERR(gss_proc_root);
 211                 gss_proc_root = NULL;
 212                 GOTO(out, rc);
 213         }
 214
 215         gss_proc_lk = lprocfs_seq_register("lgss_keyring", gss_proc_root,
 216                                                 gss_lk_lprocfs_vars, NULL);
 217         if (IS_ERR(gss_proc_lk)) {
 218                 rc = PTR_ERR(gss_proc_lk);
 219                 gss_proc_lk = NULL;
 220                 GOTO(out, rc);
 221         }
 222
 223         return 0;
 224
 225 out:
 226         CERROR("failed to initialize gss lproc entries: %d\n", rc);
 227         gss_exit_lproc();
 228
 229         return rc;
 230 }