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/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is included
* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
* GPL HEADER END
*/
/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*/
#define DEBUG_SUBSYSTEM S_SEC
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/dcache.h>
#include <linux/fs.h>
#include <linux/mutex.h>
#include <obd.h>
#include <obd_class.h>
#include <obd_support.h>
#include <lustre/lustre_idl.h>
#include <lustre_net.h>
#include <lustre_import.h>
#include <lprocfs_status.h>
#include <lustre_sec.h>
#include "gss_err.h"
#include "gss_internal.h"
#include "gss_api.h"
static struct proc_dir_entry *gss_proc_root = NULL;
static struct proc_dir_entry *gss_proc_lk = NULL;
/*
* statistic of "out-of-sequence-window"
*/
static struct {
spinlock_t oos_lock;
atomic_t oos_cli_count; /* client occurrence */
int oos_cli_behind; /* client max seqs behind */
atomic_t oos_svc_replay[3]; /* server replay detected */
atomic_t oos_svc_pass[3]; /* server verified ok */
} gss_stat_oos = {
.oos_cli_count = ATOMIC_INIT(0),
.oos_cli_behind = 0,
.oos_svc_replay = { ATOMIC_INIT(0), },
.oos_svc_pass = { ATOMIC_INIT(0), },
};
void gss_stat_oos_record_cli(int behind)
{
atomic_inc(&gss_stat_oos.oos_cli_count);
spin_lock(&gss_stat_oos.oos_lock);
if (behind > gss_stat_oos.oos_cli_behind)
gss_stat_oos.oos_cli_behind = behind;
spin_unlock(&gss_stat_oos.oos_lock);
}
void gss_stat_oos_record_svc(int phase, int replay)
{
LASSERT(phase >= 0 && phase <= 2);
if (replay)
atomic_inc(&gss_stat_oos.oos_svc_replay[phase]);
else
atomic_inc(&gss_stat_oos.oos_svc_pass[phase]);
}
static int gss_proc_oos_seq_show(struct seq_file *m, void *v)
{
return seq_printf(m,
"seqwin: %u\n"
"backwin: %u\n"
"client fall behind seqwin\n"
" occurrence: %d\n"
" max seq behind: %d\n"
"server replay detected:\n"
" phase 0: %d\n"
" phase 1: %d\n"
" phase 2: %d\n"
"server verify ok:\n"
" phase 2: %d\n",
GSS_SEQ_WIN_MAIN,
GSS_SEQ_WIN_BACK,
atomic_read(&gss_stat_oos.oos_cli_count),
gss_stat_oos.oos_cli_behind,
atomic_read(&gss_stat_oos.oos_svc_replay[0]),
atomic_read(&gss_stat_oos.oos_svc_replay[1]),
atomic_read(&gss_stat_oos.oos_svc_replay[2]),
atomic_read(&gss_stat_oos.oos_svc_pass[2]));
}
LPROC_SEQ_FOPS_RO(gss_proc_oos);
static int gss_proc_write_secinit(struct file *file, const char *buffer,
size_t count, off_t *off)
{
int rc;
rc = gss_do_ctx_init_rpc((char *) buffer, count);
if (rc) {
LASSERT(rc < 0);
return rc;
}
return count;
}
static const struct file_operations gss_proc_secinit = {
.write = gss_proc_write_secinit,
};
static struct lprocfs_vars gss_lprocfs_vars[] = {
{ "replays", &gss_proc_oos_fops },
{ "init_channel", &gss_proc_secinit, NULL, 0222 },
{ NULL }
};
/*
* for userspace helper lgss_keyring.
*
* debug_level: [0, 4], defined in utils/gss/lgss_utils.h
*/
static int gss_lk_debug_level = 1;
static int gss_lk_proc_dl_seq_show(struct seq_file *m, void *v)
{
return seq_printf(m, "%u\n", gss_lk_debug_level);
}
static int gss_lk_proc_dl_seq_write(struct file *file, const char *buffer,
size_t count, off_t *off)
{
int val, rc;
rc = lprocfs_write_helper(buffer, count, &val);
if (rc < 0)
return rc;
if (val < 0 || val > 4)
return -ERANGE;
gss_lk_debug_level = val;
return count;
}
LPROC_SEQ_FOPS(gss_lk_proc_dl);
static struct lprocfs_vars gss_lk_lprocfs_vars[] = {
{ "debug_level", &gss_lk_proc_dl_fops },
{ NULL }
};
void gss_exit_lproc(void)
{
if (gss_proc_lk) {
lprocfs_remove(&gss_proc_lk);
gss_proc_lk = NULL;
}
if (gss_proc_root) {
lprocfs_remove(&gss_proc_root);
gss_proc_root = NULL;
}
}
int gss_init_lproc(void)
{
int rc;
spin_lock_init(&gss_stat_oos.oos_lock);
gss_proc_root = lprocfs_register("gss", sptlrpc_proc_root,
gss_lprocfs_vars, NULL);
if (IS_ERR(gss_proc_root)) {
rc = PTR_ERR(gss_proc_root);
gss_proc_root = NULL;
GOTO(err_out, rc);
}
gss_proc_lk = lprocfs_register("lgss_keyring", gss_proc_root,
gss_lk_lprocfs_vars, NULL);
if (IS_ERR(gss_proc_lk)) {
rc = PTR_ERR(gss_proc_lk);
gss_proc_lk = NULL;
GOTO(err_out, rc);
}
return 0;
err_out:
CERROR("failed to initialize gss lproc entries: %d\n", rc);
gss_exit_lproc();
return rc;
}
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