mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 04:34:11 +08:00
a447c09324
This is a much better version of a previous patch to make the parser tables constant. Rather than changing the typedef, we put the "const" in all the various places where its required, allowing the __initconst exception for nfsroot which was the cause of the previous trouble. This was posted for review some time ago and I believe its been in -mm since then. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Alexander Viro <aviro@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
271 lines
5.9 KiB
C
271 lines
5.9 KiB
C
/*
|
|
* 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;
|
|
}
|
|
|