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33#include <linux/init.h>
34#include <linux/module.h>
35
36#include <linux/blkdev.h>
37#include <linux/fs.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>
44
45#include "vxfs.h"
46#include "vxfs_extern.h"
47#include "vxfs_dir.h"
48#include "vxfs_inode.h"
49
50
51MODULE_AUTHOR("Christoph Hellwig");
52MODULE_DESCRIPTION("Veritas Filesystem (VxFS) driver");
53MODULE_LICENSE("Dual BSD/GPL");
54
55
56
57static void vxfs_put_super(struct super_block *);
58static int vxfs_statfs(struct dentry *, struct kstatfs *);
59static int vxfs_remount(struct super_block *, int *, char *);
60
61static 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,
66};
67
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74
75
76
77static void
78vxfs_put_super(struct super_block *sbp)
79{
80 struct vxfs_sb_info *infp = VXFS_SBI(sbp);
81
82 vxfs_put_fake_inode(infp->vsi_fship);
83 vxfs_put_fake_inode(infp->vsi_ilist);
84 vxfs_put_fake_inode(infp->vsi_stilist);
85
86 brelse(infp->vsi_bp);
87 kfree(infp);
88}
89
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105
106
107
108static int
109vxfs_statfs(struct dentry *dentry, struct kstatfs *bufp)
110{
111 struct vxfs_sb_info *infp = VXFS_SBI(dentry->d_sb);
112
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;
117 bufp->f_bavail = 0;
118 bufp->f_files = 0;
119 bufp->f_ffree = infp->vsi_raw->vs_ifree;
120 bufp->f_namelen = VXFS_NAMELEN;
121
122 return 0;
123}
124
125static int vxfs_remount(struct super_block *sb, int *flags, char *data)
126{
127 sync_filesystem(sb);
128 *flags |= MS_RDONLY;
129 return 0;
130}
131
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146
147
148static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
149{
150 struct vxfs_sb_info *infp;
151 struct vxfs_sb *rsbp;
152 struct buffer_head *bp = NULL;
153 u_long bsize;
154 struct inode *root;
155 int ret = -EINVAL;
156
157 sbp->s_flags |= MS_RDONLY;
158
159 infp = kzalloc(sizeof(*infp), GFP_KERNEL);
160 if (!infp) {
161 printk(KERN_WARNING "vxfs: unable to allocate incore superblock\n");
162 return -ENOMEM;
163 }
164
165 bsize = sb_min_blocksize(sbp, BLOCK_SIZE);
166 if (!bsize) {
167 printk(KERN_WARNING "vxfs: unable to set blocksize\n");
168 goto out;
169 }
170
171 bp = sb_bread(sbp, 1);
172 if (!bp || !buffer_mapped(bp)) {
173 if (!silent) {
174 printk(KERN_WARNING
175 "vxfs: unable to read disk superblock\n");
176 }
177 goto out;
178 }
179
180 rsbp = (struct vxfs_sb *)bp->b_data;
181 if (rsbp->vs_magic != VXFS_SUPER_MAGIC) {
182 if (!silent)
183 printk(KERN_NOTICE "vxfs: WRONG superblock magic\n");
184 goto out;
185 }
186
187 if ((rsbp->vs_version < 2 || rsbp->vs_version > 4) && !silent) {
188 printk(KERN_NOTICE "vxfs: unsupported VxFS version (%d)\n",
189 rsbp->vs_version);
190 goto out;
191 }
192
193#ifdef DIAGNOSTIC
194 printk(KERN_DEBUG "vxfs: supported VxFS version (%d)\n", rsbp->vs_version);
195 printk(KERN_DEBUG "vxfs: blocksize: %d\n", rsbp->vs_bsize);
196#endif
197
198 sbp->s_magic = rsbp->vs_magic;
199 sbp->s_fs_info = infp;
200
201 infp->vsi_raw = rsbp;
202 infp->vsi_bp = bp;
203 infp->vsi_oltext = rsbp->vs_oltext[0];
204 infp->vsi_oltsize = rsbp->vs_oltsize;
205
206 if (!sb_set_blocksize(sbp, rsbp->vs_bsize)) {
207 printk(KERN_WARNING "vxfs: unable to set final block size\n");
208 goto out;
209 }
210
211 if (vxfs_read_olt(sbp, bsize)) {
212 printk(KERN_WARNING "vxfs: unable to read olt\n");
213 goto out;
214 }
215
216 if (vxfs_read_fshead(sbp)) {
217 printk(KERN_WARNING "vxfs: unable to read fshead\n");
218 goto out;
219 }
220
221 sbp->s_op = &vxfs_super_ops;
222 root = vxfs_iget(sbp, VXFS_ROOT_INO);
223 if (IS_ERR(root)) {
224 ret = PTR_ERR(root);
225 goto out;
226 }
227 sbp->s_root = d_make_root(root);
228 if (!sbp->s_root) {
229 printk(KERN_WARNING "vxfs: unable to get root dentry.\n");
230 goto out_free_ilist;
231 }
232
233 return 0;
234
235out_free_ilist:
236 vxfs_put_fake_inode(infp->vsi_fship);
237 vxfs_put_fake_inode(infp->vsi_ilist);
238 vxfs_put_fake_inode(infp->vsi_stilist);
239out:
240 brelse(bp);
241 kfree(infp);
242 return ret;
243}
244
245
246
247
248static struct dentry *vxfs_mount(struct file_system_type *fs_type,
249 int flags, const char *dev_name, void *data)
250{
251 return mount_bdev(fs_type, flags, dev_name, data, vxfs_fill_super);
252}
253
254static struct file_system_type vxfs_fs_type = {
255 .owner = THIS_MODULE,
256 .name = "vxfs",
257 .mount = vxfs_mount,
258 .kill_sb = kill_block_super,
259 .fs_flags = FS_REQUIRES_DEV,
260};
261MODULE_ALIAS_FS("vxfs");
262MODULE_ALIAS("vxfs");
263
264static int __init
265vxfs_init(void)
266{
267 int rv;
268
269 vxfs_inode_cachep = kmem_cache_create("vxfs_inode",
270 sizeof(struct vxfs_inode_info), 0,
271 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, NULL);
272 if (!vxfs_inode_cachep)
273 return -ENOMEM;
274 rv = register_filesystem(&vxfs_fs_type);
275 if (rv < 0)
276 kmem_cache_destroy(vxfs_inode_cachep);
277 return rv;
278}
279
280static void __exit
281vxfs_cleanup(void)
282{
283 unregister_filesystem(&vxfs_fs_type);
284
285
286
287
288 rcu_barrier();
289 kmem_cache_destroy(vxfs_inode_cachep);
290}
291
292module_init(vxfs_init);
293module_exit(vxfs_cleanup);
294