patch-2.4.5 linux/fs/freevxfs/vxfs_fshead.c

• Lines: 172
• Date: Mon May 21 12:31:06 2001
• Orig file: v2.4.4/linux/fs/freevxfs/vxfs_fshead.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.4/linux/fs/freevxfs/vxfs_fshead.c linux/fs/freevxfs/vxfs_fshead.c
@@ -0,0 +1,171 @@
+/*
+ * 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.
+ */
+
+#ident "$Id: vxfs_fshead.c,v 1.18 2001/04/25 18:11:23 hch Exp $"
+
+/*
+ * Veritas filesystem driver - fileset header routines.
+ */
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/slab.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(struct vxfs_fsh), SLAB_KERNEL)))
+			return NULL;
+		memcpy(fhp, bp->b_data, sizeof(struct vxfs_fsh));
+
+		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;
+
+	if (!(vip = vxfs_blkiget(sbp, infp->vsi_iext, infp->vsi_fshino))) {
+		printk(KERN_ERR "vxfs: unabled to read fsh inode\n");
+		return -EINVAL;
+	} else if (!VXFS_ISFSH(vip)) {
+		printk(KERN_ERR "vxfs: fsh list inode is of wrong type (%x)\n",
+				vip->vii_mode & VXFS_TYPE_MASK); 
+		return -EINVAL;
+	}
+
+
+#ifdef DIAGNOSTIC
+	printk("vxfs: fsh inode dump:\n");
+	vxfs_dumpi(vip, infp->vsi_fshino);
+#endif
+
+	if (!(infp->vsi_fship = vxfs_fake_inode(sbp, vip))) {
+		printk(KERN_ERR "vxfs: unabled to get fsh inode\n");
+		return -EINVAL;
+	}
+
+	if (!(sfp = vxfs_getfsh(infp->vsi_fship, 0))) {
+		printk(KERN_ERR "vxfs: unabled to get structural fsh\n");
+		return -EINVAL;
+	} 
+
+#ifdef DIAGNOSTIC
+	vxfs_dumpfsh(sfp);
+#endif
+
+	if (!(pfp = vxfs_getfsh(infp->vsi_fship, 1))) {
+		printk(KERN_ERR "vxfs: unabled to get primary fsh\n");
+		return -EINVAL;
+	}
+
+#ifdef DIAGNOSTIC
+	vxfs_dumpfsh(pfp);
+#endif
+
+	tip = vxfs_blkiget(sbp, infp->vsi_iext, sfp->fsh_ilistino[0]);
+	if (!tip || ((infp->vsi_stilist = vxfs_fake_inode(sbp, tip)) == NULL)) {
+		printk(KERN_ERR "vxfs: unabled to get structual list inode\n");
+		return -EINVAL;
+	} else 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); 
+		return -EINVAL;
+	}
+
+	tip = vxfs_stiget(sbp, pfp->fsh_ilistino[0]);
+	if (!tip || ((infp->vsi_ilist = vxfs_fake_inode(sbp, tip)) == NULL)) {
+		printk(KERN_ERR "vxfs: unabled to get inode list inode\n");
+		return -EINVAL;
+	} else 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);
+		return -EINVAL;
+	}
+
+	return 0;
+}