1 files changed, 278 insertions, 0 deletions

diff --git a/fs/freevxfs/vxfs_super.c b/fs/freevxfs/vxfs_super.c
new file mode 100644
index 000000000000..0ae2c7b8182a
--- /dev/null
+++ b/fs/freevxfs/vxfs_super.c
@@ -0,0 +1,278 @@
+/*
+ * Copyright (c) 2000-2001 Christoph Hellwig.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL").
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Veritas filesystem driver - superblock related routines.
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include <linux/blkdev.h>
+#include <linux/fs.h>
+#include <linux/buffer_head.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/vfs.h>
+
+#include "vxfs.h"
+#include "vxfs_extern.h"
+#include "vxfs_dir.h"
+#include "vxfs_inode.h"
+
+
+MODULE_AUTHOR("Christoph Hellwig");
+MODULE_DESCRIPTION("Veritas Filesystem (VxFS) driver");
+MODULE_LICENSE("Dual BSD/GPL");
+
+MODULE_ALIAS("vxfs"); /* makes mount -t vxfs autoload the module */
+
+
+static void             vxfs_put_super(struct super_block *);
+static int              vxfs_statfs(struct super_block *, struct kstatfs *);
+static int              vxfs_remount(struct super_block *, int *, char *);
+
+static struct super_operations vxfs_super_ops = {
+        .read_inode =           vxfs_read_inode,
+        .clear_inode =          vxfs_clear_inode,
+        .put_super =            vxfs_put_super,
+        .statfs =               vxfs_statfs,
+        .remount_fs =           vxfs_remount,
+};
+
+/**
+ * vxfs_put_super - free superblock resources
+ * @sbp:        VFS superblock.
+ *
+ * Description:
+ *   vxfs_put_super frees all resources allocated for @sbp
+ *   after the last instance of the filesystem is unmounted.
+ */
+
+static void
+vxfs_put_super(struct super_block *sbp)
+{
+        struct vxfs_sb_info     *infp = VXFS_SBI(sbp);
+
+        vxfs_put_fake_inode(infp->vsi_fship);
+        vxfs_put_fake_inode(infp->vsi_ilist);
+        vxfs_put_fake_inode(infp->vsi_stilist);
+
+        brelse(infp->vsi_bp);
+        kfree(infp);
+}
+
+/**
+ * vxfs_statfs - get filesystem information
+ * @sbp:        VFS superblock
+ * @bufp:       output buffer
+ *
+ * Description:
+ *   vxfs_statfs fills the statfs buffer @bufp with information
+ *   about the filesystem described by @sbp.
+ *
+ * Returns:
+ *   Zero.
+ *
+ * Locking:
+ *   No locks held.
+ *
+ * Notes:
+ *   This is everything but complete...
+ */
+static int
+vxfs_statfs(struct super_block *sbp, struct kstatfs *bufp)
+{
+        struct vxfs_sb_info             *infp = VXFS_SBI(sbp);
+
+        bufp->f_type = VXFS_SUPER_MAGIC;
+        bufp->f_bsize = sbp->s_blocksize;
+        bufp->f_blocks = infp->vsi_raw->vs_dsize;
+        bufp->f_bfree = infp->vsi_raw->vs_free;
+        bufp->f_bavail = 0;
+        bufp->f_files = 0;
+        bufp->f_ffree = infp->vsi_raw->vs_ifree;
+        bufp->f_namelen = VXFS_NAMELEN;
+
+        return 0;
+}
+
+static int vxfs_remount(struct super_block *sb, int *flags, char *data)
+{
+        *flags |= MS_RDONLY;
+        return 0;
+}
+
+/**
+ * vxfs_read_super - read superblock into memory and initalize filesystem
+ * @sbp:                VFS superblock (to fill)
+ * @dp:                 fs private mount data
+ * @silent:             do not complain loudly when sth is wrong
+ *
+ * Description:
+ *   We are called on the first mount of a filesystem to read the
+ *   superblock into memory and do some basic setup.
+ *
+ * Returns:
+ *   The superblock on success, else %NULL.
+ *
+ * Locking:
+ *   We are under the bkl and @sbp->s_lock.
+ */
+static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
+{
+        struct vxfs_sb_info     *infp;
+        struct vxfs_sb          *rsbp;
+        struct buffer_head      *bp = NULL;
+        u_long                  bsize;
+        struct inode *root;
+
+        sbp->s_flags |= MS_RDONLY;
+
+        infp = kmalloc(sizeof(*infp), GFP_KERNEL);
+        if (!infp) {
+                printk(KERN_WARNING "vxfs: unable to allocate incore superblock\n");
+                return -ENOMEM;
+        }
+        memset(infp, 0, sizeof(*infp));
+
+        bsize = sb_min_blocksize(sbp, BLOCK_SIZE);
+        if (!bsize) {
+                printk(KERN_WARNING "vxfs: unable to set blocksize\n");
+                goto out;
+        }
+
+        bp = sb_bread(sbp, 1);
+        if (!bp || !buffer_mapped(bp)) {
+                if (!silent) {
+                        printk(KERN_WARNING
+                                "vxfs: unable to read disk superblock\n");
+                }
+                goto out;
+        }
+
+        rsbp = (struct vxfs_sb *)bp->b_data;
+        if (rsbp->vs_magic != VXFS_SUPER_MAGIC) {
+                if (!silent)
+                        printk(KERN_NOTICE "vxfs: WRONG superblock magic\n");
+                goto out;
+        }
+
+        if ((rsbp->vs_version < 2 || rsbp->vs_version > 4) && !silent) {
+                printk(KERN_NOTICE "vxfs: unsupported VxFS version (%d)\n",
+                       rsbp->vs_version);
+                goto out;
+        }
+
+#ifdef DIAGNOSTIC
+        printk(KERN_DEBUG "vxfs: supported VxFS version (%d)\n", rsbp->vs_version);
+        printk(KERN_DEBUG "vxfs: blocksize: %d\n", rsbp->vs_bsize);
+#endif
+
+        sbp->s_magic = rsbp->vs_magic;
+        sbp->s_fs_info = (void *)infp;
+
+        infp->vsi_raw = rsbp;
+        infp->vsi_bp = bp;
+        infp->vsi_oltext = rsbp->vs_oltext[0];
+        infp->vsi_oltsize = rsbp->vs_oltsize;
+
+        if (!sb_set_blocksize(sbp, rsbp->vs_bsize)) {
+                printk(KERN_WARNING "vxfs: unable to set final block size\n");
+                goto out;
+        }
+
+        if (vxfs_read_olt(sbp, bsize)) {
+                printk(KERN_WARNING "vxfs: unable to read olt\n");
+                goto out;
+        }
+
+        if (vxfs_read_fshead(sbp)) {
+                printk(KERN_WARNING "vxfs: unable to read fshead\n");
+                goto out;
+        }
+
+        sbp->s_op = &vxfs_super_ops;
+        root = iget(sbp, VXFS_ROOT_INO);
+        sbp->s_root = d_alloc_root(root);
+        if (!sbp->s_root) {
+                iput(root);
+                printk(KERN_WARNING "vxfs: unable to get root dentry.\n");
+                goto out_free_ilist;
+        }
+
+        return 0;
+        
+out_free_ilist:
+        vxfs_put_fake_inode(infp->vsi_fship);
+        vxfs_put_fake_inode(infp->vsi_ilist);
+        vxfs_put_fake_inode(infp->vsi_stilist);
+out:
+        brelse(bp);
+        kfree(infp);
+        return -EINVAL;
+}
+
+/*
+ * The usual module blurb.
+ */
+static struct super_block *vxfs_get_sb(struct file_system_type *fs_type,
+        int flags, const char *dev_name, void *data)
+{
+        return get_sb_bdev(fs_type, flags, dev_name, data, vxfs_fill_super);
+}
+
+static struct file_system_type vxfs_fs_type = {
+        .owner          = THIS_MODULE,
+        .name           = "vxfs",
+        .get_sb         = vxfs_get_sb,
+        .kill_sb        = kill_block_super,
+        .fs_flags       = FS_REQUIRES_DEV,
+};
+
+static int __init
+vxfs_init(void)
+{
+        vxfs_inode_cachep = kmem_cache_create("vxfs_inode",
+                        sizeof(struct vxfs_inode_info), 0, 
+                        SLAB_RECLAIM_ACCOUNT, NULL, NULL);
+        if (vxfs_inode_cachep)
+                return (register_filesystem(&vxfs_fs_type));
+        return -ENOMEM;
+}
+
+static void __exit
+vxfs_cleanup(void)
+{
+        unregister_filesystem(&vxfs_fs_type);
+        kmem_cache_destroy(vxfs_inode_cachep);
+}
+
+module_init(vxfs_init);
+module_exit(vxfs_cleanup);