This source file includes following definitions.
- vxfs_put_super
- vxfs_statfs
- vxfs_remount
- vxfs_alloc_inode
- vxfs_free_inode
- vxfs_try_sb_magic
- vxfs_fill_super
- vxfs_mount
- vxfs_init
- vxfs_cleanup
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34 #include <linux/init.h>
35 #include <linux/module.h>
36
37 #include <linux/blkdev.h>
38 #include <linux/fs.h>
39 #include <linux/buffer_head.h>
40 #include <linux/kernel.h>
41 #include <linux/slab.h>
42 #include <linux/stat.h>
43 #include <linux/vfs.h>
44 #include <linux/mount.h>
45
46 #include "vxfs.h"
47 #include "vxfs_extern.h"
48 #include "vxfs_dir.h"
49 #include "vxfs_inode.h"
50
51
52 MODULE_AUTHOR("Christoph Hellwig, Krzysztof Blaszkowski");
53 MODULE_DESCRIPTION("Veritas Filesystem (VxFS) driver");
54 MODULE_LICENSE("Dual BSD/GPL");
55
56 static struct kmem_cache *vxfs_inode_cachep;
57
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65
66
67 static void
68 vxfs_put_super(struct super_block *sbp)
69 {
70 struct vxfs_sb_info *infp = VXFS_SBI(sbp);
71
72 iput(infp->vsi_fship);
73 iput(infp->vsi_ilist);
74 iput(infp->vsi_stilist);
75
76 brelse(infp->vsi_bp);
77 kfree(infp);
78 }
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97
98 static int
99 vxfs_statfs(struct dentry *dentry, struct kstatfs *bufp)
100 {
101 struct vxfs_sb_info *infp = VXFS_SBI(dentry->d_sb);
102 struct vxfs_sb *raw_sb = infp->vsi_raw;
103
104 bufp->f_type = VXFS_SUPER_MAGIC;
105 bufp->f_bsize = dentry->d_sb->s_blocksize;
106 bufp->f_blocks = fs32_to_cpu(infp, raw_sb->vs_dsize);
107 bufp->f_bfree = fs32_to_cpu(infp, raw_sb->vs_free);
108 bufp->f_bavail = 0;
109 bufp->f_files = 0;
110 bufp->f_ffree = fs32_to_cpu(infp, raw_sb->vs_ifree);
111 bufp->f_namelen = VXFS_NAMELEN;
112
113 return 0;
114 }
115
116 static int vxfs_remount(struct super_block *sb, int *flags, char *data)
117 {
118 sync_filesystem(sb);
119 *flags |= SB_RDONLY;
120 return 0;
121 }
122
123 static struct inode *vxfs_alloc_inode(struct super_block *sb)
124 {
125 struct vxfs_inode_info *vi;
126
127 vi = kmem_cache_alloc(vxfs_inode_cachep, GFP_KERNEL);
128 if (!vi)
129 return NULL;
130 inode_init_once(&vi->vfs_inode);
131 return &vi->vfs_inode;
132 }
133
134 static void vxfs_free_inode(struct inode *inode)
135 {
136 kmem_cache_free(vxfs_inode_cachep, VXFS_INO(inode));
137 }
138
139 static const struct super_operations vxfs_super_ops = {
140 .alloc_inode = vxfs_alloc_inode,
141 .free_inode = vxfs_free_inode,
142 .evict_inode = vxfs_evict_inode,
143 .put_super = vxfs_put_super,
144 .statfs = vxfs_statfs,
145 .remount_fs = vxfs_remount,
146 };
147
148 static int vxfs_try_sb_magic(struct super_block *sbp, int silent,
149 unsigned blk, __fs32 magic)
150 {
151 struct buffer_head *bp;
152 struct vxfs_sb *rsbp;
153 struct vxfs_sb_info *infp = VXFS_SBI(sbp);
154 int rc = -ENOMEM;
155
156 bp = sb_bread(sbp, blk);
157 do {
158 if (!bp || !buffer_mapped(bp)) {
159 if (!silent) {
160 printk(KERN_WARNING
161 "vxfs: unable to read disk superblock at %u\n",
162 blk);
163 }
164 break;
165 }
166
167 rc = -EINVAL;
168 rsbp = (struct vxfs_sb *)bp->b_data;
169 if (rsbp->vs_magic != magic) {
170 if (!silent)
171 printk(KERN_NOTICE
172 "vxfs: WRONG superblock magic %08x at %u\n",
173 rsbp->vs_magic, blk);
174 break;
175 }
176
177 rc = 0;
178 infp->vsi_raw = rsbp;
179 infp->vsi_bp = bp;
180 } while (0);
181
182 if (rc) {
183 infp->vsi_raw = NULL;
184 infp->vsi_bp = NULL;
185 brelse(bp);
186 }
187
188 return rc;
189 }
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206
207 static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
208 {
209 struct vxfs_sb_info *infp;
210 struct vxfs_sb *rsbp;
211 u_long bsize;
212 struct inode *root;
213 int ret = -EINVAL;
214 u32 j;
215
216 sbp->s_flags |= SB_RDONLY;
217
218 infp = kzalloc(sizeof(*infp), GFP_KERNEL);
219 if (!infp) {
220 printk(KERN_WARNING "vxfs: unable to allocate incore superblock\n");
221 return -ENOMEM;
222 }
223
224 bsize = sb_min_blocksize(sbp, BLOCK_SIZE);
225 if (!bsize) {
226 printk(KERN_WARNING "vxfs: unable to set blocksize\n");
227 goto out;
228 }
229
230 sbp->s_op = &vxfs_super_ops;
231 sbp->s_fs_info = infp;
232 sbp->s_time_min = 0;
233 sbp->s_time_max = U32_MAX;
234
235 if (!vxfs_try_sb_magic(sbp, silent, 1,
236 (__force __fs32)cpu_to_le32(VXFS_SUPER_MAGIC))) {
237
238 infp->byte_order = VXFS_BO_LE;
239 } else if (!vxfs_try_sb_magic(sbp, silent, 8,
240 (__force __fs32)cpu_to_be32(VXFS_SUPER_MAGIC))) {
241
242 infp->byte_order = VXFS_BO_BE;
243 } else {
244 if (!silent)
245 printk(KERN_NOTICE "vxfs: can't find superblock.\n");
246 goto out;
247 }
248
249 rsbp = infp->vsi_raw;
250 j = fs32_to_cpu(infp, rsbp->vs_version);
251 if ((j < 2 || j > 4) && !silent) {
252 printk(KERN_NOTICE "vxfs: unsupported VxFS version (%d)\n", j);
253 goto out;
254 }
255
256 #ifdef DIAGNOSTIC
257 printk(KERN_DEBUG "vxfs: supported VxFS version (%d)\n", j);
258 printk(KERN_DEBUG "vxfs: blocksize: %d\n",
259 fs32_to_cpu(infp, rsbp->vs_bsize));
260 #endif
261
262 sbp->s_magic = fs32_to_cpu(infp, rsbp->vs_magic);
263
264 infp->vsi_oltext = fs32_to_cpu(infp, rsbp->vs_oltext[0]);
265 infp->vsi_oltsize = fs32_to_cpu(infp, rsbp->vs_oltsize);
266
267 j = fs32_to_cpu(infp, rsbp->vs_bsize);
268 if (!sb_set_blocksize(sbp, j)) {
269 printk(KERN_WARNING "vxfs: unable to set final block size\n");
270 goto out;
271 }
272
273 if (vxfs_read_olt(sbp, bsize)) {
274 printk(KERN_WARNING "vxfs: unable to read olt\n");
275 goto out;
276 }
277
278 if (vxfs_read_fshead(sbp)) {
279 printk(KERN_WARNING "vxfs: unable to read fshead\n");
280 goto out;
281 }
282
283 root = vxfs_iget(sbp, VXFS_ROOT_INO);
284 if (IS_ERR(root)) {
285 ret = PTR_ERR(root);
286 goto out;
287 }
288 sbp->s_root = d_make_root(root);
289 if (!sbp->s_root) {
290 printk(KERN_WARNING "vxfs: unable to get root dentry.\n");
291 goto out_free_ilist;
292 }
293
294 return 0;
295
296 out_free_ilist:
297 iput(infp->vsi_fship);
298 iput(infp->vsi_ilist);
299 iput(infp->vsi_stilist);
300 out:
301 brelse(infp->vsi_bp);
302 kfree(infp);
303 return ret;
304 }
305
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308
309 static struct dentry *vxfs_mount(struct file_system_type *fs_type,
310 int flags, const char *dev_name, void *data)
311 {
312 return mount_bdev(fs_type, flags, dev_name, data, vxfs_fill_super);
313 }
314
315 static struct file_system_type vxfs_fs_type = {
316 .owner = THIS_MODULE,
317 .name = "vxfs",
318 .mount = vxfs_mount,
319 .kill_sb = kill_block_super,
320 .fs_flags = FS_REQUIRES_DEV,
321 };
322 MODULE_ALIAS_FS("vxfs");
323 MODULE_ALIAS("vxfs");
324
325 static int __init
326 vxfs_init(void)
327 {
328 int rv;
329
330 vxfs_inode_cachep = kmem_cache_create_usercopy("vxfs_inode",
331 sizeof(struct vxfs_inode_info), 0,
332 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD,
333 offsetof(struct vxfs_inode_info, vii_immed.vi_immed),
334 sizeof_field(struct vxfs_inode_info,
335 vii_immed.vi_immed),
336 NULL);
337 if (!vxfs_inode_cachep)
338 return -ENOMEM;
339 rv = register_filesystem(&vxfs_fs_type);
340 if (rv < 0)
341 kmem_cache_destroy(vxfs_inode_cachep);
342 return rv;
343 }
344
345 static void __exit
346 vxfs_cleanup(void)
347 {
348 unregister_filesystem(&vxfs_fs_type);
349
350
351
352
353 rcu_barrier();
354 kmem_cache_destroy(vxfs_inode_cachep);
355 }
356
357 module_init(vxfs_init);
358 module_exit(vxfs_cleanup);