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");
56 * vxfs_put_super - free superblock resources
57 * @sbp: VFS superblock.
60 * vxfs_put_super frees all resources allocated for @sbp
61 * after the last instance of the filesystem is unmounted.
65 vxfs_put_super(struct super_block *sbp)
67 struct vxfs_sb_info *infp = VXFS_SBI(sbp);
69 iput(infp->vsi_fship);
70 iput(infp->vsi_ilist);
71 iput(infp->vsi_stilist);
78 * vxfs_statfs - get filesystem information
79 * @dentry: VFS dentry to locate superblock
80 * @bufp: output buffer
83 * vxfs_statfs fills the statfs buffer @bufp with information
84 * about the filesystem described by @dentry.
93 * This is everything but complete...
96 vxfs_statfs(struct dentry *dentry, struct kstatfs *bufp)
98 struct vxfs_sb_info *infp = VXFS_SBI(dentry->d_sb);
99 struct vxfs_sb *raw_sb = infp->vsi_raw;
101 bufp->f_type = VXFS_SUPER_MAGIC;
102 bufp->f_bsize = dentry->d_sb->s_blocksize;
103 bufp->f_blocks = fs32_to_cpu(infp, raw_sb->vs_dsize);
104 bufp->f_bfree = fs32_to_cpu(infp, raw_sb->vs_free);
107 bufp->f_ffree = fs32_to_cpu(infp, raw_sb->vs_ifree);
108 bufp->f_namelen = VXFS_NAMELEN;
113 static int vxfs_remount(struct super_block *sb, int *flags, char *data)
120 static const struct super_operations vxfs_super_ops = {
121 .evict_inode = vxfs_evict_inode,
122 .put_super = vxfs_put_super,
123 .statfs = vxfs_statfs,
124 .remount_fs = vxfs_remount,
127 static int vxfs_try_sb_magic(struct super_block *sbp, int silent,
128 unsigned blk, __fs32 magic)
130 struct buffer_head *bp;
131 struct vxfs_sb *rsbp;
132 struct vxfs_sb_info *infp = VXFS_SBI(sbp);
135 bp = sb_bread(sbp, blk);
137 if (!bp || !buffer_mapped(bp)) {
140 "vxfs: unable to read disk superblock at %u\n",
147 rsbp = (struct vxfs_sb *)bp->b_data;
148 if (rsbp->vs_magic != magic) {
151 "vxfs: WRONG superblock magic %08x at %u\n",
152 rsbp->vs_magic, blk);
157 infp->vsi_raw = rsbp;
162 infp->vsi_raw = NULL;
171 * vxfs_read_super - read superblock into memory and initialize filesystem
172 * @sbp: VFS superblock (to fill)
173 * @dp: fs private mount data
174 * @silent: do not complain loudly when sth is wrong
177 * We are called on the first mount of a filesystem to read the
178 * superblock into memory and do some basic setup.
181 * The superblock on success, else %NULL.
184 * We are under @sbp->s_lock.
186 static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
188 struct vxfs_sb_info *infp;
189 struct vxfs_sb *rsbp;
195 sbp->s_flags |= MS_RDONLY;
197 infp = kzalloc(sizeof(*infp), GFP_KERNEL);
199 printk(KERN_WARNING "vxfs: unable to allocate incore superblock\n");
203 bsize = sb_min_blocksize(sbp, BLOCK_SIZE);
205 printk(KERN_WARNING "vxfs: unable to set blocksize\n");
209 sbp->s_fs_info = infp;
211 if (!vxfs_try_sb_magic(sbp, silent, 1,
212 (__force __fs32)cpu_to_le32(VXFS_SUPER_MAGIC))) {
214 infp->byte_order = VXFS_BO_LE;
215 } else if (!vxfs_try_sb_magic(sbp, silent, 8,
216 (__force __fs32)cpu_to_be32(VXFS_SUPER_MAGIC))) {
218 infp->byte_order = VXFS_BO_BE;
221 printk(KERN_NOTICE "vxfs: can't find superblock.\n");
225 rsbp = infp->vsi_raw;
226 j = fs32_to_cpu(infp, rsbp->vs_version);
227 if ((j < 2 || j > 4) && !silent) {
228 printk(KERN_NOTICE "vxfs: unsupported VxFS version (%d)\n", j);
233 printk(KERN_DEBUG "vxfs: supported VxFS version (%d)\n", j);
234 printk(KERN_DEBUG "vxfs: blocksize: %d\n",
235 fs32_to_cpu(infp, rsbp->vs_bsize));
238 sbp->s_magic = fs32_to_cpu(infp, rsbp->vs_magic);
240 infp->vsi_oltext = fs32_to_cpu(infp, rsbp->vs_oltext[0]);
241 infp->vsi_oltsize = fs32_to_cpu(infp, rsbp->vs_oltsize);
243 j = fs32_to_cpu(infp, rsbp->vs_bsize);
244 if (!sb_set_blocksize(sbp, j)) {
245 printk(KERN_WARNING "vxfs: unable to set final block size\n");
249 if (vxfs_read_olt(sbp, bsize)) {
250 printk(KERN_WARNING "vxfs: unable to read olt\n");
254 if (vxfs_read_fshead(sbp)) {
255 printk(KERN_WARNING "vxfs: unable to read fshead\n");
259 sbp->s_op = &vxfs_super_ops;
260 root = vxfs_iget(sbp, VXFS_ROOT_INO);
265 sbp->s_root = d_make_root(root);
267 printk(KERN_WARNING "vxfs: unable to get root dentry.\n");
274 iput(infp->vsi_fship);
275 iput(infp->vsi_ilist);
276 iput(infp->vsi_stilist);
278 brelse(infp->vsi_bp);
284 * The usual module blurb.
286 static struct dentry *vxfs_mount(struct file_system_type *fs_type,
287 int flags, const char *dev_name, void *data)
289 return mount_bdev(fs_type, flags, dev_name, data, vxfs_fill_super);
292 static struct file_system_type vxfs_fs_type = {
293 .owner = THIS_MODULE,
296 .kill_sb = kill_block_super,
297 .fs_flags = FS_REQUIRES_DEV,
299 MODULE_ALIAS_FS("vxfs"); /* makes mount -t vxfs autoload the module */
300 MODULE_ALIAS("vxfs");
307 vxfs_inode_cachep = kmem_cache_create("vxfs_inode",
308 sizeof(struct vxfs_inode_info), 0,
309 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, NULL);
310 if (!vxfs_inode_cachep)
312 rv = register_filesystem(&vxfs_fs_type);
314 kmem_cache_destroy(vxfs_inode_cachep);
321 unregister_filesystem(&vxfs_fs_type);
323 * Make sure all delayed rcu free inodes are flushed before we
327 kmem_cache_destroy(vxfs_inode_cachep);
330 module_init(vxfs_init);
331 module_exit(vxfs_cleanup);