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>
43 #include <linux/mount.h>
46 #include "vxfs_extern.h"
48 #include "vxfs_inode.h"
51 MODULE_AUTHOR("Christoph Hellwig");
52 MODULE_DESCRIPTION("Veritas Filesystem (VxFS) driver");
53 MODULE_LICENSE("Dual BSD/GPL");
57 static void vxfs_put_super(struct super_block *);
58 static int vxfs_statfs(struct dentry *, struct kstatfs *);
59 static int vxfs_remount(struct super_block *, int *, char *);
61 static const struct super_operations vxfs_super_ops = {
62 .evict_inode = vxfs_evict_inode,
63 .put_super = vxfs_put_super,
64 .statfs = vxfs_statfs,
65 .remount_fs = vxfs_remount,
69 * vxfs_put_super - free superblock resources
70 * @sbp: VFS superblock.
73 * vxfs_put_super frees all resources allocated for @sbp
74 * after the last instance of the filesystem is unmounted.
78 vxfs_put_super(struct super_block *sbp)
80 struct vxfs_sb_info *infp = VXFS_SBI(sbp);
82 vxfs_put_fake_inode(infp->vsi_fship);
83 vxfs_put_fake_inode(infp->vsi_ilist);
84 vxfs_put_fake_inode(infp->vsi_stilist);
91 * vxfs_statfs - get filesystem information
92 * @dentry: VFS dentry to locate superblock
93 * @bufp: output buffer
96 * vxfs_statfs fills the statfs buffer @bufp with information
97 * about the filesystem described by @dentry.
106 * This is everything but complete...
109 vxfs_statfs(struct dentry *dentry, struct kstatfs *bufp)
111 struct vxfs_sb_info *infp = VXFS_SBI(dentry->d_sb);
113 bufp->f_type = VXFS_SUPER_MAGIC;
114 bufp->f_bsize = dentry->d_sb->s_blocksize;
115 bufp->f_blocks = infp->vsi_raw->vs_dsize;
116 bufp->f_bfree = infp->vsi_raw->vs_free;
119 bufp->f_ffree = infp->vsi_raw->vs_ifree;
120 bufp->f_namelen = VXFS_NAMELEN;
125 static int vxfs_remount(struct super_block *sb, int *flags, char *data)
132 * vxfs_read_super - read superblock into memory and initialize filesystem
133 * @sbp: VFS superblock (to fill)
134 * @dp: fs private mount data
135 * @silent: do not complain loudly when sth is wrong
138 * We are called on the first mount of a filesystem to read the
139 * superblock into memory and do some basic setup.
142 * The superblock on success, else %NULL.
145 * We are under @sbp->s_lock.
147 static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
149 struct vxfs_sb_info *infp;
150 struct vxfs_sb *rsbp;
151 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 = vxfs_iget(sbp, VXFS_ROOT_INO);
226 sbp->s_root = d_make_root(root);
228 printk(KERN_WARNING "vxfs: unable to get root dentry.\n");
235 vxfs_put_fake_inode(infp->vsi_fship);
236 vxfs_put_fake_inode(infp->vsi_ilist);
237 vxfs_put_fake_inode(infp->vsi_stilist);
245 * The usual module blurb.
247 static struct dentry *vxfs_mount(struct file_system_type *fs_type,
248 int flags, const char *dev_name, void *data)
250 return mount_bdev(fs_type, flags, dev_name, data, vxfs_fill_super);
253 static struct file_system_type vxfs_fs_type = {
254 .owner = THIS_MODULE,
257 .kill_sb = kill_block_super,
258 .fs_flags = FS_REQUIRES_DEV,
260 MODULE_ALIAS_FS("vxfs"); /* makes mount -t vxfs autoload the module */
261 MODULE_ALIAS("vxfs");
268 vxfs_inode_cachep = kmem_cache_create("vxfs_inode",
269 sizeof(struct vxfs_inode_info), 0,
270 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, NULL);
271 if (!vxfs_inode_cachep)
273 rv = register_filesystem(&vxfs_fs_type);
275 kmem_cache_destroy(vxfs_inode_cachep);
282 unregister_filesystem(&vxfs_fs_type);
284 * Make sure all delayed rcu free inodes are flushed before we
288 kmem_cache_destroy(vxfs_inode_cachep);
291 module_init(vxfs_init);
292 module_exit(vxfs_cleanup);