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