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30#include <linux/time.h>
31#include <linux/fs.h>
32
33#include "ufs_fs.h"
34#include "ufs.h"
35#include "util.h"
36
37static inline int ufs_add_nondir(struct dentry *dentry, struct inode *inode)
38{
39 int err = ufs_add_link(dentry, inode);
40 if (!err) {
41 d_instantiate(dentry, inode);
42 return 0;
43 }
44 inode_dec_link_count(inode);
45 iput(inode);
46 return err;
47}
48
49static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
50{
51 struct inode * inode = NULL;
52 ino_t ino;
53
54 if (dentry->d_name.len > UFS_MAXNAMLEN)
55 return ERR_PTR(-ENAMETOOLONG);
56
57 lock_ufs(dir->i_sb);
58 ino = ufs_inode_by_name(dir, &dentry->d_name);
59 if (ino)
60 inode = ufs_iget(dir->i_sb, ino);
61 unlock_ufs(dir->i_sb);
62 return d_splice_alias(inode, dentry);
63}
64
65
66
67
68
69
70
71
72
73static int ufs_create (struct inode * dir, struct dentry * dentry, umode_t mode,
74 struct nameidata *nd)
75{
76 struct inode *inode;
77 int err;
78
79 UFSD("BEGIN\n");
80
81 inode = ufs_new_inode(dir, mode);
82 err = PTR_ERR(inode);
83
84 if (!IS_ERR(inode)) {
85 inode->i_op = &ufs_file_inode_operations;
86 inode->i_fop = &ufs_file_operations;
87 inode->i_mapping->a_ops = &ufs_aops;
88 mark_inode_dirty(inode);
89 lock_ufs(dir->i_sb);
90 err = ufs_add_nondir(dentry, inode);
91 unlock_ufs(dir->i_sb);
92 }
93 UFSD("END: err=%d\n", err);
94 return err;
95}
96
97static int ufs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)
98{
99 struct inode *inode;
100 int err;
101
102 if (!old_valid_dev(rdev))
103 return -EINVAL;
104
105 inode = ufs_new_inode(dir, mode);
106 err = PTR_ERR(inode);
107 if (!IS_ERR(inode)) {
108 init_special_inode(inode, mode, rdev);
109 ufs_set_inode_dev(inode->i_sb, UFS_I(inode), rdev);
110 mark_inode_dirty(inode);
111 lock_ufs(dir->i_sb);
112 err = ufs_add_nondir(dentry, inode);
113 unlock_ufs(dir->i_sb);
114 }
115 return err;
116}
117
118static int ufs_symlink (struct inode * dir, struct dentry * dentry,
119 const char * symname)
120{
121 struct super_block * sb = dir->i_sb;
122 int err = -ENAMETOOLONG;
123 unsigned l = strlen(symname)+1;
124 struct inode * inode;
125
126 if (l > sb->s_blocksize)
127 goto out_notlocked;
128
129 lock_ufs(dir->i_sb);
130 inode = ufs_new_inode(dir, S_IFLNK | S_IRWXUGO);
131 err = PTR_ERR(inode);
132 if (IS_ERR(inode))
133 goto out;
134
135 if (l > UFS_SB(sb)->s_uspi->s_maxsymlinklen) {
136
137 inode->i_op = &ufs_symlink_inode_operations;
138 inode->i_mapping->a_ops = &ufs_aops;
139 err = page_symlink(inode, symname, l);
140 if (err)
141 goto out_fail;
142 } else {
143
144 inode->i_op = &ufs_fast_symlink_inode_operations;
145 memcpy(UFS_I(inode)->i_u1.i_symlink, symname, l);
146 inode->i_size = l-1;
147 }
148 mark_inode_dirty(inode);
149
150 err = ufs_add_nondir(dentry, inode);
151out:
152 unlock_ufs(dir->i_sb);
153out_notlocked:
154 return err;
155
156out_fail:
157 inode_dec_link_count(inode);
158 iput(inode);
159 goto out;
160}
161
162static int ufs_link (struct dentry * old_dentry, struct inode * dir,
163 struct dentry *dentry)
164{
165 struct inode *inode = old_dentry->d_inode;
166 int error;
167
168 lock_ufs(dir->i_sb);
169 if (inode->i_nlink >= UFS_LINK_MAX) {
170 unlock_ufs(dir->i_sb);
171 return -EMLINK;
172 }
173
174 inode->i_ctime = CURRENT_TIME_SEC;
175 inode_inc_link_count(inode);
176 ihold(inode);
177
178 error = ufs_add_nondir(dentry, inode);
179 unlock_ufs(dir->i_sb);
180 return error;
181}
182
183static int ufs_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
184{
185 struct inode * inode;
186 int err = -EMLINK;
187
188 if (dir->i_nlink >= UFS_LINK_MAX)
189 goto out;
190
191 lock_ufs(dir->i_sb);
192 inode_inc_link_count(dir);
193
194 inode = ufs_new_inode(dir, S_IFDIR|mode);
195 err = PTR_ERR(inode);
196 if (IS_ERR(inode))
197 goto out_dir;
198
199 inode->i_op = &ufs_dir_inode_operations;
200 inode->i_fop = &ufs_dir_operations;
201 inode->i_mapping->a_ops = &ufs_aops;
202
203 inode_inc_link_count(inode);
204
205 err = ufs_make_empty(inode, dir);
206 if (err)
207 goto out_fail;
208
209 err = ufs_add_link(dentry, inode);
210 if (err)
211 goto out_fail;
212 unlock_ufs(dir->i_sb);
213
214 d_instantiate(dentry, inode);
215out:
216 return err;
217
218out_fail:
219 inode_dec_link_count(inode);
220 inode_dec_link_count(inode);
221 iput (inode);
222out_dir:
223 inode_dec_link_count(dir);
224 unlock_ufs(dir->i_sb);
225 goto out;
226}
227
228static int ufs_unlink(struct inode *dir, struct dentry *dentry)
229{
230 struct inode * inode = dentry->d_inode;
231 struct ufs_dir_entry *de;
232 struct page *page;
233 int err = -ENOENT;
234
235 de = ufs_find_entry(dir, &dentry->d_name, &page);
236 if (!de)
237 goto out;
238
239 err = ufs_delete_entry(dir, de, page);
240 if (err)
241 goto out;
242
243 inode->i_ctime = dir->i_ctime;
244 inode_dec_link_count(inode);
245 err = 0;
246out:
247 return err;
248}
249
250static int ufs_rmdir (struct inode * dir, struct dentry *dentry)
251{
252 struct inode * inode = dentry->d_inode;
253 int err= -ENOTEMPTY;
254
255 lock_ufs(dir->i_sb);
256 if (ufs_empty_dir (inode)) {
257 err = ufs_unlink(dir, dentry);
258 if (!err) {
259 inode->i_size = 0;
260 inode_dec_link_count(inode);
261 inode_dec_link_count(dir);
262 }
263 }
264 unlock_ufs(dir->i_sb);
265 return err;
266}
267
268static int ufs_rename(struct inode *old_dir, struct dentry *old_dentry,
269 struct inode *new_dir, struct dentry *new_dentry)
270{
271 struct inode *old_inode = old_dentry->d_inode;
272 struct inode *new_inode = new_dentry->d_inode;
273 struct page *dir_page = NULL;
274 struct ufs_dir_entry * dir_de = NULL;
275 struct page *old_page;
276 struct ufs_dir_entry *old_de;
277 int err = -ENOENT;
278
279 old_de = ufs_find_entry(old_dir, &old_dentry->d_name, &old_page);
280 if (!old_de)
281 goto out;
282
283 if (S_ISDIR(old_inode->i_mode)) {
284 err = -EIO;
285 dir_de = ufs_dotdot(old_inode, &dir_page);
286 if (!dir_de)
287 goto out_old;
288 }
289
290 if (new_inode) {
291 struct page *new_page;
292 struct ufs_dir_entry *new_de;
293
294 err = -ENOTEMPTY;
295 if (dir_de && !ufs_empty_dir(new_inode))
296 goto out_dir;
297
298 err = -ENOENT;
299 new_de = ufs_find_entry(new_dir, &new_dentry->d_name, &new_page);
300 if (!new_de)
301 goto out_dir;
302 ufs_set_link(new_dir, new_de, new_page, old_inode);
303 new_inode->i_ctime = CURRENT_TIME_SEC;
304 if (dir_de)
305 drop_nlink(new_inode);
306 inode_dec_link_count(new_inode);
307 } else {
308 if (dir_de) {
309 err = -EMLINK;
310 if (new_dir->i_nlink >= UFS_LINK_MAX)
311 goto out_dir;
312 }
313 err = ufs_add_link(new_dentry, old_inode);
314 if (err)
315 goto out_dir;
316 if (dir_de)
317 inode_inc_link_count(new_dir);
318 }
319
320
321
322
323
324 old_inode->i_ctime = CURRENT_TIME_SEC;
325
326 ufs_delete_entry(old_dir, old_de, old_page);
327 mark_inode_dirty(old_inode);
328
329 if (dir_de) {
330 ufs_set_link(old_inode, dir_de, dir_page, new_dir);
331 inode_dec_link_count(old_dir);
332 }
333 return 0;
334
335
336out_dir:
337 if (dir_de) {
338 kunmap(dir_page);
339 page_cache_release(dir_page);
340 }
341out_old:
342 kunmap(old_page);
343 page_cache_release(old_page);
344out:
345 return err;
346}
347
348const struct inode_operations ufs_dir_inode_operations = {
349 .create = ufs_create,
350 .lookup = ufs_lookup,
351 .link = ufs_link,
352 .unlink = ufs_unlink,
353 .symlink = ufs_symlink,
354 .mkdir = ufs_mkdir,
355 .rmdir = ufs_rmdir,
356 .mknod = ufs_mknod,
357 .rename = ufs_rename,
358};
359
