/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
* Copyright (C) 2004-2005 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 v.2.
*/
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <asm/semaphore.h>
#include "gfs2.h"
#include "mount.h"
#include "sys.h"
/**
* 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, ",")); ) {
if (!*o)
continue;
v = strchr(o, '=');
if (v)
*v++ = 0;
if (!strcmp(o, "lockproto")) {
if (!v)
goto need_value;
if (remount && strcmp(v, args->ar_lockproto))
goto cant_remount;
strncpy(args->ar_lockproto, v, GFS2_LOCKNAME_LEN);
args->ar_lockproto[GFS2_LOCKNAME_LEN - 1] = 0;
}
else if (!strcmp(o, "locktable")) {
if (!v)
goto need_value;
if (remount && strcmp(v, args->ar_locktable))
goto cant_remount;
strncpy(args->ar_locktable, v, GFS2_LOCKNAME_LEN);
args->ar_locktable[GFS2_LOCKNAME_LEN - 1] = 0;
}
else if (!strcmp(o, "hostdata")) {
if (!v)
goto need_value;
if (remount && strcmp(v, args->ar_hostdata))
goto cant_remount;
strncpy(args->ar_hostdata, v, GFS2_LOCKNAME_LEN);
args->ar_hostdata[GFS2_LOCKNAME_LEN - 1] = 0;
}
else if (!strcmp(o, "spectator")) {
if (remount && !args->ar_spectator)
goto cant_remount;
args->ar_spectator = 1;
sdp->sd_vfs->s_flags |= MS_RDONLY;
}
else if (!strcmp(o, "ignore_local_fs")) {
if (remount && !args->ar_ignore_local_fs)
goto cant_remount;
args->ar_ignore_local_fs = 1;
}
else if (!strcmp(o, "localflocks")) {
if (remount && !args->ar_localflocks)
goto cant_remount;
args->ar_localflocks = 1;
}
else if (!strcmp(o, "localcaching")) {
if (remount && !args->ar_localcaching)
goto cant_remount;
args->ar_localcaching = 1;
}
else if (!strcmp(o, "debug"))
args->ar_debug = 1;
else if (!strcmp(o, "nodebug"))
args->ar_debug = 0;
else if (!strcmp(o, "upgrade")) {
if (remount && !args->ar_upgrade)
goto cant_remount;
args->ar_upgrade = 1;
}
else if (!strcmp(o, "num_glockd")) {
unsigned int x;
if (!v)
goto need_value;
sscanf(v, "%u", &x);
if (remount && x != args->ar_num_glockd)
goto cant_remount;
if (!x || x > GFS2_GLOCKD_MAX) {
fs_info(sdp, "0 < num_glockd <= %u (not %u)\n",
GFS2_GLOCKD_MAX, x);
error = -EINVAL;
break;
}
args->ar_num_glockd = x;
}
else if (!strcmp(o, "acl")) {
args->ar_posix_acl = 1;
sdp->sd_vfs->s_flags |= MS_POSIXACL;
}
else if (!strcmp(o, "noacl")) {
args->ar_posix_acl = 0;
sdp->sd_vfs->s_flags &= ~MS_POSIXACL;
}
else if (!strcmp(o, "quota")) {
if (!v)
goto need_value;
if (!strcmp(v, "off"))
args->ar_quota = GFS2_QUOTA_OFF;
else if (!strcmp(v, "account"))
args->ar_quota = GFS2_QUOTA_ACCOUNT;
else if (!strcmp(v, "on"))
args->ar_quota = GFS2_QUOTA_ON;
else {
fs_info(sdp, "invalid value for quota\n");
error = -EINVAL;
break;
}
}
else if (!strcmp(o, "suiddir"))
args->ar_suiddir = 1;
else if (!strcmp(o, "nosuiddir"))
args->ar_suiddir = 0;
else if (!strcmp(o, "data")) {
if (!v)
goto need_value;
if (!strcmp(v, "writeback"))
args->ar_data = GFS2_DATA_WRITEBACK;
else if (!strcmp(v, "ordered"))
args->ar_data = GFS2_DATA_ORDERED;
else {
fs_info(sdp, "invalid value for data\n");
error = -EINVAL;
break;
}
}
else {
fs_info(sdp, "unknown option: %s\n", o);
error = -EINVAL;
break;
}
}
if (error)
fs_info(sdp, "invalid mount option(s)\n");
if (data != data_arg)
kfree(data);
return error;
need_value:
fs_info(sdp, "need value for option %s\n", o);
return -EINVAL;
cant_remount:
fs_info(sdp, "can't remount with option %s\n", o);
return -EINVAL;
}
