[GFS2] The core of GFS2
This patch contains all the core files for GFS2.
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/mount.c b/fs/gfs2/mount.c
new file mode 100644
index 0000000..3e42697
--- /dev/null
+++ b/fs/gfs2/mount.c
@@ -0,0 +1,211 @@
+/*
+ * 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;
+}
+