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DEFINITIONS
This source file includes following definitions.
- gfs2_mount_args
/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU General Public License version 2.
*/
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/gfs2_ondisk.h>
#include <linux/lm_interface.h>
#include <linux/parser.h>
#include "gfs2.h"
#include "incore.h"
#include "mount.h"
#include "sys.h"
#include "util.h"
enum {
Opt_lockproto,
Opt_locktable,
Opt_hostdata,
Opt_spectator,
Opt_ignore_local_fs,
Opt_localflocks,
Opt_localcaching,
Opt_debug,
Opt_nodebug,
Opt_upgrade,
Opt_num_glockd,
Opt_acl,
Opt_noacl,
Opt_quota_off,
Opt_quota_account,
Opt_quota_on,
Opt_suiddir,
Opt_nosuiddir,
Opt_data_writeback,
Opt_data_ordered,
Opt_meta,
Opt_err,
};
static const match_table_t tokens = {
{Opt_lockproto, "lockproto=%s"},
{Opt_locktable, "locktable=%s"},
{Opt_hostdata, "hostdata=%s"},
{Opt_spectator, "spectator"},
{Opt_ignore_local_fs, "ignore_local_fs"},
{Opt_localflocks, "localflocks"},
{Opt_localcaching, "localcaching"},
{Opt_debug, "debug"},
{Opt_nodebug, "nodebug"},
{Opt_upgrade, "upgrade"},
{Opt_num_glockd, "num_glockd=%d"},
{Opt_acl, "acl"},
{Opt_noacl, "noacl"},
{Opt_quota_off, "quota=off"},
{Opt_quota_account, "quota=account"},
{Opt_quota_on, "quota=on"},
{Opt_suiddir, "suiddir"},
{Opt_nosuiddir, "nosuiddir"},
{Opt_data_writeback, "data=writeback"},
{Opt_data_ordered, "data=ordered"},
{Opt_meta, "meta"},
{Opt_err, NULL}
};
/**
* gfs2_mount_args - Parse mount options
* @sdp:
* @data:
*
* Return: errno
*/
int gfs2_mount_args(struct gfs2_sbd *sdp, char *data_arg, int remount)
{
struct gfs2_args *args = &sdp->sd_args;
char *data = data_arg;
char *options, *o, *v;
int error = 0;
if (!remount) {
/* If someone preloaded options, use those instead */
spin_lock(&gfs2_sys_margs_lock);
if (gfs2_sys_margs) {
data = gfs2_sys_margs;
gfs2_sys_margs = NULL;
}
spin_unlock(&gfs2_sys_margs_lock);
/* Set some defaults */
args->ar_num_glockd = GFS2_GLOCKD_DEFAULT;
args->ar_quota = GFS2_QUOTA_DEFAULT;
args->ar_data = GFS2_DATA_DEFAULT;
}
/* Split the options into tokens with the "," character and
process them */
for (options = data; (o = strsep(&options, ",")); ) {
int token, option;
substring_t tmp[MAX_OPT_ARGS];
if (!*o)
continue;
token = match_token(o, tokens, tmp);
switch (token) {
case Opt_lockproto:
v = match_strdup(&tmp[0]);
if (!v) {
fs_info(sdp, "no memory for lockproto\n");
error = -ENOMEM;
goto out_error;
}
if (remount && strcmp(v, args->ar_lockproto)) {
kfree(v);
goto cant_remount;
}
strncpy(args->ar_lockproto, v, GFS2_LOCKNAME_LEN);
args->ar_lockproto[GFS2_LOCKNAME_LEN - 1] = 0;
kfree(v);
break;
case Opt_locktable:
v = match_strdup(&tmp[0]);
if (!v) {
fs_info(sdp, "no memory for locktable\n");
error = -ENOMEM;
goto out_error;
}
if (remount && strcmp(v, args->ar_locktable)) {
kfree(v);
goto cant_remount;
}
strncpy(args->ar_locktable, v, GFS2_LOCKNAME_LEN);
args->ar_locktable[GFS2_LOCKNAME_LEN - 1] = 0;
kfree(v);
break;
case Opt_hostdata:
v = match_strdup(&tmp[0]);
if (!v) {
fs_info(sdp, "no memory for hostdata\n");
error = -ENOMEM;
goto out_error;
}
if (remount && strcmp(v, args->ar_hostdata)) {
kfree(v);
goto cant_remount;
}
strncpy(args->ar_hostdata, v, GFS2_LOCKNAME_LEN);
args->ar_hostdata[GFS2_LOCKNAME_LEN - 1] = 0;
kfree(v);
break;
case Opt_spectator:
if (remount && !args->ar_spectator)
goto cant_remount;
args->ar_spectator = 1;
sdp->sd_vfs->s_flags |= MS_RDONLY;
break;
case Opt_ignore_local_fs:
if (remount && !args->ar_ignore_local_fs)
goto cant_remount;
args->ar_ignore_local_fs = 1;
break;
case Opt_localflocks:
if (remount && !args->ar_localflocks)
goto cant_remount;
args->ar_localflocks = 1;
break;
case Opt_localcaching:
if (remount && !args->ar_localcaching)
goto cant_remount;
args->ar_localcaching = 1;
break;
case Opt_debug:
args->ar_debug = 1;
break;
case Opt_nodebug:
args->ar_debug = 0;
break;
case Opt_upgrade:
if (remount && !args->ar_upgrade)
goto cant_remount;
args->ar_upgrade = 1;
break;
case Opt_num_glockd:
if ((error = match_int(&tmp[0], &option))) {
fs_info(sdp, "problem getting num_glockd\n");
goto out_error;
}
if (remount && option != args->ar_num_glockd)
goto cant_remount;
if (!option || option > GFS2_GLOCKD_MAX) {
fs_info(sdp, "0 < num_glockd <= %u (not %u)\n",
GFS2_GLOCKD_MAX, option);
error = -EINVAL;
goto out_error;
}
args->ar_num_glockd = option;
break;
case Opt_acl:
args->ar_posix_acl = 1;
sdp->sd_vfs->s_flags |= MS_POSIXACL;
break;
case Opt_noacl:
args->ar_posix_acl = 0;
sdp->sd_vfs->s_flags &= ~MS_POSIXACL;
break;
case Opt_quota_off:
args->ar_quota = GFS2_QUOTA_OFF;
break;
case Opt_quota_account:
args->ar_quota = GFS2_QUOTA_ACCOUNT;
break;
case Opt_quota_on:
args->ar_quota = GFS2_QUOTA_ON;
break;
case Opt_suiddir:
args->ar_suiddir = 1;
break;
case Opt_nosuiddir:
args->ar_suiddir = 0;
break;
case Opt_data_writeback:
args->ar_data = GFS2_DATA_WRITEBACK;
break;
case Opt_data_ordered:
args->ar_data = GFS2_DATA_ORDERED;
break;
case Opt_meta:
if (remount && args->ar_meta != 1)
goto cant_remount;
args->ar_meta = 1;
break;
case Opt_err:
default:
fs_info(sdp, "unknown option: %s\n", o);
error = -EINVAL;
goto out_error;
}
}
out_error:
if (error)
fs_info(sdp, "invalid mount option(s)\n");
if (data != data_arg)
kfree(data);
return error;
cant_remount:
fs_info(sdp, "can't remount with option %s\n", o);
return -EINVAL;
}