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
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * Veritas filesystem driver - superblock related routines.
33 #include <linux/init.h>
34 #include <linux/module.h>
36 #include <linux/blkdev.h>
38 #include <linux/buffer_head.h>
39 #include <linux/kernel.h>
40 #include <linux/slab.h>
41 #include <linux/stat.h>
42 #include <linux/vfs.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");
54 MODULE_ALIAS("vxfs"); /* makes mount -t vxfs autoload the module */
57 static void vxfs_put_super(struct super_block *);
58 static int vxfs_statfs(struct super_block *, struct kstatfs *);
59 static int vxfs_remount(struct super_block *, int *, char *);
61 static struct super_operations vxfs_super_ops = {
62 .read_inode = vxfs_read_inode,
63 .clear_inode = vxfs_clear_inode,
64 .put_super = vxfs_put_super,
65 .statfs = vxfs_statfs,
66 .remount_fs = vxfs_remount,
70 * vxfs_put_super - free superblock resources
71 * @sbp: VFS superblock.
74 * vxfs_put_super frees all resources allocated for @sbp
75 * after the last instance of the filesystem is unmounted.
79 vxfs_put_super(struct super_block *sbp)
81 struct vxfs_sb_info *infp = VXFS_SBI(sbp);
83 vxfs_put_fake_inode(infp->vsi_fship);
84 vxfs_put_fake_inode(infp->vsi_ilist);
85 vxfs_put_fake_inode(infp->vsi_stilist);
92 * vxfs_statfs - get filesystem information
93 * @sbp: VFS superblock
94 * @bufp: output buffer
97 * vxfs_statfs fills the statfs buffer @bufp with information
98 * about the filesystem described by @sbp.
107 * This is everything but complete...
110 vxfs_statfs(struct super_block *sbp, struct kstatfs *bufp)
112 struct vxfs_sb_info *infp = VXFS_SBI(sbp);
114 bufp->f_type = VXFS_SUPER_MAGIC;
115 bufp->f_bsize = sbp->s_blocksize;
116 bufp->f_blocks = infp->vsi_raw->vs_dsize;
117 bufp->f_bfree = infp->vsi_raw->vs_free;
120 bufp->f_ffree = infp->vsi_raw->vs_ifree;
121 bufp->f_namelen = VXFS_NAMELEN;
126 static int vxfs_remount(struct super_block *sb, int *flags, char *data)
133 * vxfs_read_super - read superblock into memory and initalize filesystem
134 * @sbp: VFS superblock (to fill)
135 * @dp: fs private mount data
136 * @silent: do not complain loudly when sth is wrong
139 * We are called on the first mount of a filesystem to read the
140 * superblock into memory and do some basic setup.
143 * The superblock on success, else %NULL.
146 * We are under the bkl and @sbp->s_lock.
148 static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
150 struct vxfs_sb_info *infp;
151 struct vxfs_sb *rsbp;
152 struct buffer_head *bp = NULL;
156 sbp->s_flags |= MS_RDONLY;
158 infp = kzalloc(sizeof(*infp), GFP_KERNEL);
160 printk(KERN_WARNING "vxfs: unable to allocate incore superblock\n");
164 bsize = sb_min_blocksize(sbp, BLOCK_SIZE);
166 printk(KERN_WARNING "vxfs: unable to set blocksize\n");
170 bp = sb_bread(sbp, 1);
171 if (!bp || !buffer_mapped(bp)) {
174 "vxfs: unable to read disk superblock\n");
179 rsbp = (struct vxfs_sb *)bp->b_data;
180 if (rsbp->vs_magic != VXFS_SUPER_MAGIC) {
182 printk(KERN_NOTICE "vxfs: WRONG superblock magic\n");
186 if ((rsbp->vs_version < 2 || rsbp->vs_version > 4) && !silent) {
187 printk(KERN_NOTICE "vxfs: unsupported VxFS version (%d)\n",
193 printk(KERN_DEBUG "vxfs: supported VxFS version (%d)\n", rsbp->vs_version);
194 printk(KERN_DEBUG "vxfs: blocksize: %d\n", rsbp->vs_bsize);
197 sbp->s_magic = rsbp->vs_magic;
198 sbp->s_fs_info = infp;
200 infp->vsi_raw = rsbp;
202 infp->vsi_oltext = rsbp->vs_oltext[0];
203 infp->vsi_oltsize = rsbp->vs_oltsize;
205 if (!sb_set_blocksize(sbp, rsbp->vs_bsize)) {
206 printk(KERN_WARNING "vxfs: unable to set final block size\n");
210 if (vxfs_read_olt(sbp, bsize)) {
211 printk(KERN_WARNING "vxfs: unable to read olt\n");
215 if (vxfs_read_fshead(sbp)) {
216 printk(KERN_WARNING "vxfs: unable to read fshead\n");
220 sbp->s_op = &vxfs_super_ops;
221 root = iget(sbp, VXFS_ROOT_INO);
222 sbp->s_root = d_alloc_root(root);
225 printk(KERN_WARNING "vxfs: unable to get root dentry.\n");
232 vxfs_put_fake_inode(infp->vsi_fship);
233 vxfs_put_fake_inode(infp->vsi_ilist);
234 vxfs_put_fake_inode(infp->vsi_stilist);
242 * The usual module blurb.
244 static struct super_block *vxfs_get_sb(struct file_system_type *fs_type,
245 int flags, const char *dev_name, void *data)
247 return get_sb_bdev(fs_type, flags, dev_name, data, vxfs_fill_super);
250 static struct file_system_type vxfs_fs_type = {
251 .owner = THIS_MODULE,
253 .get_sb = vxfs_get_sb,
254 .kill_sb = kill_block_super,
255 .fs_flags = FS_REQUIRES_DEV,
261 vxfs_inode_cachep = kmem_cache_create("vxfs_inode",
262 sizeof(struct vxfs_inode_info), 0,
263 SLAB_RECLAIM_ACCOUNT, NULL, NULL);
264 if (vxfs_inode_cachep)
265 return register_filesystem(&vxfs_fs_type);
272 unregister_filesystem(&vxfs_fs_type);
273 kmem_cache_destroy(vxfs_inode_cachep);
276 module_init(vxfs_init);
277 module_exit(vxfs_cleanup);