[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>

1 files changed, 211 insertions, 0 deletions

diff --git a/fs/gfs2/mount.c b/fs/gfs2/mount.c
new file mode 100644
index 000000000000..3e42697aafc7
--- /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;
+}
+