1
2
3
4
5
6
7
8
9#include <linux/smp_lock.h>
10#include "hpfs_fn.h"
11
12static int hpfs_dir_release(struct inode *inode, struct file *filp)
13{
14 lock_kernel();
15 hpfs_del_pos(inode, &filp->f_pos);
16
17 unlock_kernel();
18 return 0;
19}
20
21
22
23static loff_t hpfs_dir_lseek(struct file *filp, loff_t off, int whence)
24{
25 loff_t new_off = off + (whence == 1 ? filp->f_pos : 0);
26 loff_t pos;
27 struct quad_buffer_head qbh;
28 struct inode *i = filp->f_path.dentry->d_inode;
29 struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
30 struct super_block *s = i->i_sb;
31
32 lock_kernel();
33
34
35 if (new_off == 0 || new_off == 1 || new_off == 11 || new_off == 12 || new_off == 13) goto ok;
36 mutex_lock(&i->i_mutex);
37 pos = ((loff_t) hpfs_de_as_down_as_possible(s, hpfs_inode->i_dno) << 4) + 1;
38 while (pos != new_off) {
39 if (map_pos_dirent(i, &pos, &qbh)) hpfs_brelse4(&qbh);
40 else goto fail;
41 if (pos == 12) goto fail;
42 }
43 mutex_unlock(&i->i_mutex);
44ok:
45 unlock_kernel();
46 return filp->f_pos = new_off;
47fail:
48 mutex_unlock(&i->i_mutex);
49
50 unlock_kernel();
51 return -ESPIPE;
52}
53
54static int hpfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
55{
56 struct inode *inode = filp->f_path.dentry->d_inode;
57 struct hpfs_inode_info *hpfs_inode = hpfs_i(inode);
58 struct quad_buffer_head qbh;
59 struct hpfs_dirent *de;
60 int lc;
61 long old_pos;
62 char *tempname;
63 int c1, c2 = 0;
64 int ret = 0;
65
66 lock_kernel();
67
68 if (hpfs_sb(inode->i_sb)->sb_chk) {
69 if (hpfs_chk_sectors(inode->i_sb, inode->i_ino, 1, "dir_fnode")) {
70 ret = -EFSERROR;
71 goto out;
72 }
73 if (hpfs_chk_sectors(inode->i_sb, hpfs_inode->i_dno, 4, "dir_dnode")) {
74 ret = -EFSERROR;
75 goto out;
76 }
77 }
78 if (hpfs_sb(inode->i_sb)->sb_chk >= 2) {
79 struct buffer_head *bh;
80 struct fnode *fno;
81 int e = 0;
82 if (!(fno = hpfs_map_fnode(inode->i_sb, inode->i_ino, &bh))) {
83 ret = -EIOERROR;
84 goto out;
85 }
86 if (!fno->dirflag) {
87 e = 1;
88 hpfs_error(inode->i_sb, "not a directory, fnode %08lx",
89 (unsigned long)inode->i_ino);
90 }
91 if (hpfs_inode->i_dno != fno->u.external[0].disk_secno) {
92 e = 1;
93 hpfs_error(inode->i_sb, "corrupted inode: i_dno == %08x, fnode -> dnode == %08x", hpfs_inode->i_dno, fno->u.external[0].disk_secno);
94 }
95 brelse(bh);
96 if (e) {
97 ret = -EFSERROR;
98 goto out;
99 }
100 }
101 lc = hpfs_sb(inode->i_sb)->sb_lowercase;
102 if (filp->f_pos == 12) {
103 filp->f_pos = 13;
104 goto out;
105 }
106 if (filp->f_pos == 13) {
107 ret = -ENOENT;
108 goto out;
109 }
110
111 while (1) {
112 again:
113
114
115
116 if (hpfs_sb(inode->i_sb)->sb_chk)
117 if (hpfs_stop_cycles(inode->i_sb, filp->f_pos, &c1, &c2, "hpfs_readdir")) {
118 ret = -EFSERROR;
119 goto out;
120 }
121 if (filp->f_pos == 12)
122 goto out;
123 if (filp->f_pos == 3 || filp->f_pos == 4 || filp->f_pos == 5) {
124 printk("HPFS: warning: pos==%d\n",(int)filp->f_pos);
125 goto out;
126 }
127 if (filp->f_pos == 0) {
128 if (filldir(dirent, ".", 1, filp->f_pos, inode->i_ino, DT_DIR) < 0)
129 goto out;
130 filp->f_pos = 11;
131 }
132 if (filp->f_pos == 11) {
133 if (filldir(dirent, "..", 2, filp->f_pos, hpfs_inode->i_parent_dir, DT_DIR) < 0)
134 goto out;
135 filp->f_pos = 1;
136 }
137 if (filp->f_pos == 1) {
138 filp->f_pos = ((loff_t) hpfs_de_as_down_as_possible(inode->i_sb, hpfs_inode->i_dno) << 4) + 1;
139 hpfs_add_pos(inode, &filp->f_pos);
140 filp->f_version = inode->i_version;
141 }
142 old_pos = filp->f_pos;
143 if (!(de = map_pos_dirent(inode, &filp->f_pos, &qbh))) {
144 ret = -EIOERROR;
145 goto out;
146 }
147 if (de->first || de->last) {
148 if (hpfs_sb(inode->i_sb)->sb_chk) {
149 if (de->first && !de->last && (de->namelen != 2
150 || de ->name[0] != 1 || de->name[1] != 1))
151 hpfs_error(inode->i_sb, "hpfs_readdir: bad ^A^A entry; pos = %08lx", old_pos);
152 if (de->last && (de->namelen != 1 || de ->name[0] != 255))
153 hpfs_error(inode->i_sb, "hpfs_readdir: bad \\377 entry; pos = %08lx", old_pos);
154 }
155 hpfs_brelse4(&qbh);
156 goto again;
157 }
158 tempname = hpfs_translate_name(inode->i_sb, de->name, de->namelen, lc, de->not_8x3);
159 if (filldir(dirent, tempname, de->namelen, old_pos, de->fnode, DT_UNKNOWN) < 0) {
160 filp->f_pos = old_pos;
161 if (tempname != (char *)de->name) kfree(tempname);
162 hpfs_brelse4(&qbh);
163 goto out;
164 }
165 if (tempname != (char *)de->name) kfree(tempname);
166 hpfs_brelse4(&qbh);
167 }
168out:
169 unlock_kernel();
170 return ret;
171}
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188struct dentry *hpfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
189{
190 const char *name = dentry->d_name.name;
191 unsigned len = dentry->d_name.len;
192 struct quad_buffer_head qbh;
193 struct hpfs_dirent *de;
194 ino_t ino;
195 int err;
196 struct inode *result = NULL;
197 struct hpfs_inode_info *hpfs_result;
198
199 lock_kernel();
200 if ((err = hpfs_chk_name((char *)name, &len))) {
201 if (err == -ENAMETOOLONG) {
202 unlock_kernel();
203 return ERR_PTR(-ENAMETOOLONG);
204 }
205 goto end_add;
206 }
207
208
209
210
211
212 de = map_dirent(dir, hpfs_i(dir)->i_dno, (char *) name, len, NULL, &qbh);
213
214
215
216
217
218 if (!de) goto end;
219
220
221
222
223
224 ino = de->fnode;
225
226
227
228
229
230 result = iget_locked(dir->i_sb, ino);
231 if (!result) {
232 hpfs_error(dir->i_sb, "hpfs_lookup: can't get inode");
233 goto bail1;
234 }
235 if (result->i_state & I_NEW) {
236 hpfs_init_inode(result);
237 if (de->directory)
238 hpfs_read_inode(result);
239 else if (de->ea_size && hpfs_sb(dir->i_sb)->sb_eas)
240 hpfs_read_inode(result);
241 else {
242 result->i_mode |= S_IFREG;
243 result->i_mode &= ~0111;
244 result->i_op = &hpfs_file_iops;
245 result->i_fop = &hpfs_file_ops;
246 result->i_nlink = 1;
247 }
248 unlock_new_inode(result);
249 }
250 hpfs_result = hpfs_i(result);
251 if (!de->directory) hpfs_result->i_parent_dir = dir->i_ino;
252
253 hpfs_decide_conv(result, (char *)name, len);
254
255 if (de->has_acl || de->has_xtd_perm) if (!(dir->i_sb->s_flags & MS_RDONLY)) {
256 hpfs_error(result->i_sb, "ACLs or XPERM found. This is probably HPFS386. This driver doesn't support it now. Send me some info on these structures");
257 goto bail1;
258 }
259
260
261
262
263
264
265 if (!result->i_ctime.tv_sec) {
266 if (!(result->i_ctime.tv_sec = local_to_gmt(dir->i_sb, de->creation_date)))
267 result->i_ctime.tv_sec = 1;
268 result->i_ctime.tv_nsec = 0;
269 result->i_mtime.tv_sec = local_to_gmt(dir->i_sb, de->write_date);
270 result->i_mtime.tv_nsec = 0;
271 result->i_atime.tv_sec = local_to_gmt(dir->i_sb, de->read_date);
272 result->i_atime.tv_nsec = 0;
273 hpfs_result->i_ea_size = de->ea_size;
274 if (!hpfs_result->i_ea_mode && de->read_only)
275 result->i_mode &= ~0222;
276 if (!de->directory) {
277 if (result->i_size == -1) {
278 result->i_size = de->file_size;
279 result->i_data.a_ops = &hpfs_aops;
280 hpfs_i(result)->mmu_private = result->i_size;
281
282
283
284
285
286
287 result->i_blocks = 1 + ((result->i_size + 511) >> 9);
288 }
289 }
290 }
291
292 hpfs_brelse4(&qbh);
293
294
295
296
297
298 end:
299 end_add:
300 hpfs_set_dentry_operations(dentry);
301 unlock_kernel();
302 d_add(dentry, result);
303 return NULL;
304
305
306
307
308 bail1:
309
310 hpfs_brelse4(&qbh);
311
312
313
314 unlock_kernel();
315 return ERR_PTR(-ENOENT);
316}
317
318const struct file_operations hpfs_dir_ops =
319{
320 .llseek = hpfs_dir_lseek,
321 .read = generic_read_dir,
322 .readdir = hpfs_readdir,
323 .release = hpfs_dir_release,
324 .fsync = hpfs_file_fsync,
325};
326