Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 | /*
* 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/sched.h>
#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 "gfs2.h"
#include "incore.h"
#include "mount.h"
#include "sys.h"
#include "util.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;
}
|