1 files changed, 202 insertions, 0 deletions

diff --git a/fs/freevxfs/vxfs_fshead.c b/fs/freevxfs/vxfs_fshead.c
new file mode 100644
index 000000000000..05b19f70bf97
--- /dev/null
+++ b/fs/freevxfs/vxfs_fshead.c
@@ -0,0 +1,202 @@
+/*
+ * 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 - fileset header routines.
+ */
+#include <linux/fs.h>
+#include <linux/buffer_head.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+
+#include "vxfs.h"
+#include "vxfs_inode.h"
+#include "vxfs_extern.h"
+#include "vxfs_fshead.h"
+
+
+#ifdef DIAGNOSTIC
+static void
+vxfs_dumpfsh(struct vxfs_fsh *fhp)
+{
+        printk("\n\ndumping fileset header:\n");
+        printk("----------------------------\n");
+        printk("version: %u\n", fhp->fsh_version);
+        printk("fsindex: %u\n", fhp->fsh_fsindex);
+        printk("iauino: %u\tninodes:%u\n",
+                        fhp->fsh_iauino, fhp->fsh_ninodes);
+        printk("maxinode: %u\tlctino: %u\n",
+                        fhp->fsh_maxinode, fhp->fsh_lctino);
+        printk("nau: %u\n", fhp->fsh_nau);
+        printk("ilistino[0]: %u\tilistino[1]: %u\n",
+                        fhp->fsh_ilistino[0], fhp->fsh_ilistino[1]);
+}
+#endif
+
+/**
+ * vxfs_getfsh - read fileset header into memory
+ * @ip:         the (fake) fileset header inode
+ * @which:      0 for the structural, 1 for the primary fsh.
+ *
+ * Description:
+ *   vxfs_getfsh reads either the structural or primary fileset header
+ *   described by @ip into memory.
+ *
+ * Returns:
+ *   The fileset header structure on success, else Zero.
+ */
+static struct vxfs_fsh *
+vxfs_getfsh(struct inode *ip, int which)
+{
+        struct buffer_head              *bp;
+
+        bp = vxfs_bread(ip, which);
+        if (buffer_mapped(bp)) {
+                struct vxfs_fsh         *fhp;
+
+                if (!(fhp = kmalloc(sizeof(*fhp), SLAB_KERNEL)))
+                        return NULL;
+                memcpy(fhp, bp->b_data, sizeof(*fhp));
+
+                brelse(bp);
+                return (fhp);
+        }
+
+        return NULL;
+}
+
+/**
+ * vxfs_read_fshead - read the fileset headers
+ * @sbp:        superblock to which the fileset belongs
+ *
+ * Description:
+ *   vxfs_read_fshead will fill the inode and structural inode list in @sb.
+ *
+ * Returns:
+ *   Zero on success, else a negative error code (-EINVAL).
+ */
+int
+vxfs_read_fshead(struct super_block *sbp)
+{
+        struct vxfs_sb_info             *infp = VXFS_SBI(sbp);
+        struct vxfs_fsh                 *pfp, *sfp;
+        struct vxfs_inode_info          *vip, *tip;
+
+        vip = vxfs_blkiget(sbp, infp->vsi_iext, infp->vsi_fshino);
+        if (!vip) {
+                printk(KERN_ERR "vxfs: unabled to read fsh inode\n");
+                return -EINVAL;
+        }
+        if (!VXFS_ISFSH(vip)) {
+                printk(KERN_ERR "vxfs: fsh list inode is of wrong type (%x)\n",
+                                vip->vii_mode & VXFS_TYPE_MASK); 
+                goto out_free_fship;
+        }
+
+
+#ifdef DIAGNOSTIC
+        printk("vxfs: fsh inode dump:\n");
+        vxfs_dumpi(vip, infp->vsi_fshino);
+#endif
+
+        infp->vsi_fship = vxfs_get_fake_inode(sbp, vip);
+        if (!infp->vsi_fship) {
+                printk(KERN_ERR "vxfs: unabled to get fsh inode\n");
+                goto out_free_fship;
+        }
+
+        sfp = vxfs_getfsh(infp->vsi_fship, 0);
+        if (!sfp) {
+                printk(KERN_ERR "vxfs: unabled to get structural fsh\n");
+                goto out_iput_fship;
+        } 
+
+#ifdef DIAGNOSTIC
+        vxfs_dumpfsh(sfp);
+#endif
+
+        pfp = vxfs_getfsh(infp->vsi_fship, 1);
+        if (!pfp) {
+                printk(KERN_ERR "vxfs: unabled to get primary fsh\n");
+                goto out_free_sfp;
+        }
+
+#ifdef DIAGNOSTIC
+        vxfs_dumpfsh(pfp);
+#endif
+
+        tip = vxfs_blkiget(sbp, infp->vsi_iext, sfp->fsh_ilistino[0]);
+        if (!tip)
+                goto out_free_pfp;
+
+        infp->vsi_stilist = vxfs_get_fake_inode(sbp, tip);
+        if (!infp->vsi_stilist) {
+                printk(KERN_ERR "vxfs: unabled to get structual list inode\n");
+                kfree(tip);
+                goto out_free_pfp;
+        }
+        if (!VXFS_ISILT(VXFS_INO(infp->vsi_stilist))) {
+                printk(KERN_ERR "vxfs: structual list inode is of wrong type (%x)\n",
+                                VXFS_INO(infp->vsi_stilist)->vii_mode & VXFS_TYPE_MASK); 
+                goto out_iput_stilist;
+        }
+
+        tip = vxfs_stiget(sbp, pfp->fsh_ilistino[0]);
+        if (!tip)
+                goto out_iput_stilist;
+        infp->vsi_ilist = vxfs_get_fake_inode(sbp, tip);
+        if (!infp->vsi_ilist) {
+                printk(KERN_ERR "vxfs: unabled to get inode list inode\n");
+                kfree(tip);
+                goto out_iput_stilist;
+        }
+        if (!VXFS_ISILT(VXFS_INO(infp->vsi_ilist))) {
+                printk(KERN_ERR "vxfs: inode list inode is of wrong type (%x)\n",
+                                VXFS_INO(infp->vsi_ilist)->vii_mode & VXFS_TYPE_MASK);
+                goto out_iput_ilist;
+        }
+
+        return 0;
+
+ out_iput_ilist:
+        iput(infp->vsi_ilist);
+ out_iput_stilist:
+        iput(infp->vsi_stilist);
+ out_free_pfp:
+        kfree(pfp);
+ out_free_sfp:
+        kfree(sfp);
+ out_iput_fship:
+        iput(infp->vsi_fship);
+        return -EINVAL;
+ out_free_fship:
+        kfree(vip);
+        return -EINVAL;
+}