2 * Copyright (c) 2000-2001 Christoph Hellwig.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions, and the following disclaimer,
10 * without modification.
11 * 2. The name of the author may not be used to endorse or promote products
12 * derived from this software without specific prior written permission.
14 * Alternatively, this software may be distributed under the terms of the
15 * GNU General Public License ("GPL").
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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30 #ident "$Id: vxfs_super.c,v 1.29 2002/01/02 22:02:12 hch Exp hch $"
33 * Veritas filesystem driver - superblock related routines.
35 #include <linux/init.h>
36 #include <linux/module.h>
38 #include <linux/blkdev.h>
40 #include <linux/kernel.h>
41 #include <linux/slab.h>
42 #include <linux/stat.h>
45 #include "vxfs_extern.h"
47 #include "vxfs_inode.h"
50 MODULE_AUTHOR("Christoph Hellwig");
51 MODULE_DESCRIPTION("Veritas Filesystem (VxFS) driver");
52 MODULE_LICENSE("Dual BSD/GPL");
55 static void vxfs_put_super(struct super_block *);
56 static int vxfs_statfs(struct super_block *, struct statfs *);
58 static struct super_operations vxfs_super_ops = {
59 .read_inode = vxfs_read_inode,
60 .put_inode = vxfs_put_inode,
61 .put_super = vxfs_put_super,
62 .statfs = vxfs_statfs,
66 * vxfs_put_super - free superblock resources
67 * @sbp: VFS superblock.
70 * vxfs_put_super frees all resources allocated for @sbp
71 * after the last instance of the filesystem is unmounted.
75 vxfs_put_super(struct super_block *sbp)
77 struct vxfs_sb_info *infp = VXFS_SBI(sbp);
79 vxfs_put_fake_inode(infp->vsi_fship);
80 vxfs_put_fake_inode(infp->vsi_ilist);
81 vxfs_put_fake_inode(infp->vsi_stilist);
88 * vxfs_statfs - get filesystem information
89 * @sbp: VFS superblock
90 * @bufp: output buffer
93 * vxfs_statfs fills the statfs buffer @bufp with information
94 * about the filesystem described by @sbp.
100 * We are under bkl and @sbp->s_lock.
103 * This is everything but complete...
106 vxfs_statfs(struct super_block *sbp, struct statfs *bufp)
108 struct vxfs_sb_info *infp = VXFS_SBI(sbp);
110 bufp->f_type = VXFS_SUPER_MAGIC;
111 bufp->f_bsize = sbp->s_blocksize;
112 bufp->f_blocks = infp->vsi_raw->vs_dsize;
113 bufp->f_bfree = infp->vsi_raw->vs_free;
116 bufp->f_ffree = infp->vsi_raw->vs_ifree;
117 bufp->f_namelen = VXFS_NAMELEN;
123 * vxfs_read_super - read superblock into memory and initalize filesystem
124 * @sbp: VFS superblock (to fill)
125 * @dp: fs private mount data
126 * @silent: do not complain loudly when sth is wrong
129 * We are called on the first mount of a filesystem to read the
130 * superblock into memory and do some basic setup.
133 * The superblock on success, else %NULL.
136 * We are under the bkl and @sbp->s_lock.
138 static struct super_block *
139 vxfs_read_super(struct super_block *sbp, void *dp, int silent)
141 struct vxfs_sb_info *infp;
142 struct vxfs_sb *rsbp;
143 struct buffer_head *bp = NULL;
146 infp = kmalloc(sizeof(*infp), GFP_KERNEL);
148 printk(KERN_WARNING "vxfs: unable to allocate incore superblock\n");
151 memset(infp, 0, sizeof(*infp));
153 bsize = sb_min_blocksize(sbp, BLOCK_SIZE);
155 printk(KERN_WARNING "vxfs: unable to set blocksize\n");
159 bp = sb_bread(sbp, 1);
160 if (!bp || !buffer_mapped(bp)) {
163 "vxfs: unable to read disk superblock\n");
168 rsbp = (struct vxfs_sb *)bp->b_data;
169 if (rsbp->vs_magic != VXFS_SUPER_MAGIC) {
171 printk(KERN_NOTICE "vxfs: WRONG superblock magic\n");
175 if ((rsbp->vs_version < 2 || rsbp->vs_version > 4) && !silent) {
176 printk(KERN_NOTICE "vxfs: unsupported VxFS version (%d)\n",
182 printk(KERN_DEBUG "vxfs: supported VxFS version (%d)\n", rsbp->vs_version);
183 printk(KERN_DEBUG "vxfs: blocksize: %d\n", rsbp->vs_bsize);
186 sbp->s_magic = rsbp->vs_magic;
187 sbp->u.generic_sbp = (void *)infp;
189 infp->vsi_raw = rsbp;
191 infp->vsi_oltext = rsbp->vs_oltext[0];
192 infp->vsi_oltsize = rsbp->vs_oltsize;
194 if (!sb_set_blocksize(sbp, rsbp->vs_bsize)) {
195 printk(KERN_WARNING "vxfs: unable to set final block size\n");
199 if (vxfs_read_olt(sbp, bsize)) {
200 printk(KERN_WARNING "vxfs: unable to read olt\n");
204 if (vxfs_read_fshead(sbp)) {
205 printk(KERN_WARNING "vxfs: unable to read fshead\n");
209 sbp->s_op = &vxfs_super_ops;
210 sbp->s_root = d_alloc_root(iget(sbp, VXFS_ROOT_INO));
212 printk(KERN_WARNING "vxfs: unable to get root dentry.\n");
219 vxfs_put_fake_inode(infp->vsi_fship);
220 vxfs_put_fake_inode(infp->vsi_ilist);
221 vxfs_put_fake_inode(infp->vsi_stilist);
229 * The usual module blurb.
231 static DECLARE_FSTYPE_DEV(vxfs_fs_type, "vxfs", vxfs_read_super);
236 vxfs_inode_cachep = kmem_cache_create("vxfs_inode",
237 sizeof(struct vxfs_inode_info), 0, 0, NULL, NULL);
238 if (vxfs_inode_cachep)
239 return (register_filesystem(&vxfs_fs_type));
246 unregister_filesystem(&vxfs_fs_type);
247 kmem_cache_destroy(vxfs_inode_cachep);
250 module_init(vxfs_init);
251 module_exit(vxfs_cleanup);