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