Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * dir.c | |
3 | * | |
4 | * Copyright (C) 1995, 1996 by Volker Lendecke | |
5 | * Modified for big endian by J.F. Chadima and David S. Miller | |
6 | * Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache | |
7 | * Modified 1998, 1999 Wolfram Pienkoss for NLS | |
8 | * Modified 1999 Wolfram Pienkoss for directory caching | |
9 | * Modified 2000 Ben Harris, University of Cambridge for NFS NS meta-info | |
10 | * | |
11 | */ | |
12 | ||
1da177e4 LT |
13 | |
14 | #include <linux/time.h> | |
15 | #include <linux/errno.h> | |
16 | #include <linux/stat.h> | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/vmalloc.h> | |
20 | #include <linux/mm.h> | |
21 | #include <asm/uaccess.h> | |
22 | #include <asm/byteorder.h> | |
23 | #include <linux/smp_lock.h> | |
24 | ||
25 | #include <linux/ncp_fs.h> | |
26 | ||
27 | #include "ncplib_kernel.h" | |
28 | ||
29 | static void ncp_read_volume_list(struct file *, void *, filldir_t, | |
30 | struct ncp_cache_control *); | |
31 | static void ncp_do_readdir(struct file *, void *, filldir_t, | |
32 | struct ncp_cache_control *); | |
33 | ||
34 | static int ncp_readdir(struct file *, void *, filldir_t); | |
35 | ||
36 | static int ncp_create(struct inode *, struct dentry *, int, struct nameidata *); | |
37 | static struct dentry *ncp_lookup(struct inode *, struct dentry *, struct nameidata *); | |
38 | static int ncp_unlink(struct inode *, struct dentry *); | |
39 | static int ncp_mkdir(struct inode *, struct dentry *, int); | |
40 | static int ncp_rmdir(struct inode *, struct dentry *); | |
41 | static int ncp_rename(struct inode *, struct dentry *, | |
42 | struct inode *, struct dentry *); | |
43 | static int ncp_mknod(struct inode * dir, struct dentry *dentry, | |
44 | int mode, dev_t rdev); | |
45 | #if defined(CONFIG_NCPFS_EXTRAS) || defined(CONFIG_NCPFS_NFS_NS) | |
46 | extern int ncp_symlink(struct inode *, struct dentry *, const char *); | |
47 | #else | |
48 | #define ncp_symlink NULL | |
49 | #endif | |
50 | ||
4b6f5d20 | 51 | const struct file_operations ncp_dir_operations = |
1da177e4 LT |
52 | { |
53 | .read = generic_read_dir, | |
54 | .readdir = ncp_readdir, | |
55 | .ioctl = ncp_ioctl, | |
56 | }; | |
57 | ||
58 | struct inode_operations ncp_dir_inode_operations = | |
59 | { | |
60 | .create = ncp_create, | |
61 | .lookup = ncp_lookup, | |
62 | .unlink = ncp_unlink, | |
63 | .symlink = ncp_symlink, | |
64 | .mkdir = ncp_mkdir, | |
65 | .rmdir = ncp_rmdir, | |
66 | .mknod = ncp_mknod, | |
67 | .rename = ncp_rename, | |
68 | .setattr = ncp_notify_change, | |
69 | }; | |
70 | ||
71 | /* | |
72 | * Dentry operations routines | |
73 | */ | |
74 | static int ncp_lookup_validate(struct dentry *, struct nameidata *); | |
75 | static int ncp_hash_dentry(struct dentry *, struct qstr *); | |
76 | static int ncp_compare_dentry (struct dentry *, struct qstr *, struct qstr *); | |
77 | static int ncp_delete_dentry(struct dentry *); | |
78 | ||
79 | static struct dentry_operations ncp_dentry_operations = | |
80 | { | |
81 | .d_revalidate = ncp_lookup_validate, | |
82 | .d_hash = ncp_hash_dentry, | |
83 | .d_compare = ncp_compare_dentry, | |
84 | .d_delete = ncp_delete_dentry, | |
85 | }; | |
86 | ||
87 | struct dentry_operations ncp_root_dentry_operations = | |
88 | { | |
89 | .d_hash = ncp_hash_dentry, | |
90 | .d_compare = ncp_compare_dentry, | |
91 | .d_delete = ncp_delete_dentry, | |
92 | }; | |
93 | ||
94 | ||
95 | /* | |
96 | * Note: leave the hash unchanged if the directory | |
97 | * is case-sensitive. | |
98 | */ | |
99 | static int | |
100 | ncp_hash_dentry(struct dentry *dentry, struct qstr *this) | |
101 | { | |
102 | struct nls_table *t; | |
103 | unsigned long hash; | |
104 | int i; | |
105 | ||
106 | t = NCP_IO_TABLE(dentry); | |
107 | ||
108 | if (!ncp_case_sensitive(dentry->d_inode)) { | |
109 | hash = init_name_hash(); | |
110 | for (i=0; i<this->len ; i++) | |
111 | hash = partial_name_hash(ncp_tolower(t, this->name[i]), | |
112 | hash); | |
113 | this->hash = end_name_hash(hash); | |
114 | } | |
115 | return 0; | |
116 | } | |
117 | ||
118 | static int | |
119 | ncp_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b) | |
120 | { | |
121 | if (a->len != b->len) | |
122 | return 1; | |
123 | ||
124 | if (ncp_case_sensitive(dentry->d_inode)) | |
125 | return strncmp(a->name, b->name, a->len); | |
126 | ||
127 | return ncp_strnicmp(NCP_IO_TABLE(dentry), a->name, b->name, a->len); | |
128 | } | |
129 | ||
130 | /* | |
131 | * This is the callback from dput() when d_count is going to 0. | |
132 | * We use this to unhash dentries with bad inodes. | |
133 | * Closing files can be safely postponed until iput() - it's done there anyway. | |
134 | */ | |
135 | static int | |
136 | ncp_delete_dentry(struct dentry * dentry) | |
137 | { | |
138 | struct inode *inode = dentry->d_inode; | |
139 | ||
140 | if (inode) { | |
141 | if (is_bad_inode(inode)) | |
142 | return 1; | |
143 | } else | |
144 | { | |
145 | /* N.B. Unhash negative dentries? */ | |
146 | } | |
147 | return 0; | |
148 | } | |
149 | ||
150 | static inline int | |
151 | ncp_single_volume(struct ncp_server *server) | |
152 | { | |
153 | return (server->m.mounted_vol[0] != '\0'); | |
154 | } | |
155 | ||
156 | static inline int ncp_is_server_root(struct inode *inode) | |
157 | { | |
158 | return (!ncp_single_volume(NCP_SERVER(inode)) && | |
159 | inode == inode->i_sb->s_root->d_inode); | |
160 | } | |
161 | ||
162 | ||
163 | /* | |
164 | * This is the callback when the dcache has a lookup hit. | |
165 | */ | |
166 | ||
167 | ||
168 | #ifdef CONFIG_NCPFS_STRONG | |
169 | /* try to delete a readonly file (NW R bit set) */ | |
170 | ||
171 | static int | |
172 | ncp_force_unlink(struct inode *dir, struct dentry* dentry) | |
173 | { | |
174 | int res=0x9c,res2; | |
175 | struct nw_modify_dos_info info; | |
176 | __le32 old_nwattr; | |
177 | struct inode *inode; | |
178 | ||
179 | memset(&info, 0, sizeof(info)); | |
180 | ||
181 | /* remove the Read-Only flag on the NW server */ | |
182 | inode = dentry->d_inode; | |
183 | ||
184 | old_nwattr = NCP_FINFO(inode)->nwattr; | |
185 | info.attributes = old_nwattr & ~(aRONLY|aDELETEINHIBIT|aRENAMEINHIBIT); | |
186 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(inode), inode, NULL, DM_ATTRIBUTES, &info); | |
187 | if (res2) | |
188 | goto leave_me; | |
189 | ||
190 | /* now try again the delete operation */ | |
191 | res = ncp_del_file_or_subdir2(NCP_SERVER(dir), dentry); | |
192 | ||
193 | if (res) /* delete failed, set R bit again */ | |
194 | { | |
195 | info.attributes = old_nwattr; | |
196 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(inode), inode, NULL, DM_ATTRIBUTES, &info); | |
197 | if (res2) | |
198 | goto leave_me; | |
199 | } | |
200 | leave_me: | |
201 | return(res); | |
202 | } | |
203 | #endif /* CONFIG_NCPFS_STRONG */ | |
204 | ||
205 | #ifdef CONFIG_NCPFS_STRONG | |
206 | static int | |
207 | ncp_force_rename(struct inode *old_dir, struct dentry* old_dentry, char *_old_name, | |
208 | struct inode *new_dir, struct dentry* new_dentry, char *_new_name) | |
209 | { | |
210 | struct nw_modify_dos_info info; | |
211 | int res=0x90,res2; | |
212 | struct inode *old_inode = old_dentry->d_inode; | |
213 | __le32 old_nwattr = NCP_FINFO(old_inode)->nwattr; | |
214 | __le32 new_nwattr = 0; /* shut compiler warning */ | |
215 | int old_nwattr_changed = 0; | |
216 | int new_nwattr_changed = 0; | |
217 | ||
218 | memset(&info, 0, sizeof(info)); | |
219 | ||
220 | /* remove the Read-Only flag on the NW server */ | |
221 | ||
222 | info.attributes = old_nwattr & ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT); | |
223 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(old_inode), old_inode, NULL, DM_ATTRIBUTES, &info); | |
224 | if (!res2) | |
225 | old_nwattr_changed = 1; | |
226 | if (new_dentry && new_dentry->d_inode) { | |
227 | new_nwattr = NCP_FINFO(new_dentry->d_inode)->nwattr; | |
228 | info.attributes = new_nwattr & ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT); | |
229 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(new_dir), new_dir, _new_name, DM_ATTRIBUTES, &info); | |
230 | if (!res2) | |
231 | new_nwattr_changed = 1; | |
232 | } | |
233 | /* now try again the rename operation */ | |
234 | /* but only if something really happened */ | |
235 | if (new_nwattr_changed || old_nwattr_changed) { | |
236 | res = ncp_ren_or_mov_file_or_subdir(NCP_SERVER(old_dir), | |
237 | old_dir, _old_name, | |
238 | new_dir, _new_name); | |
239 | } | |
240 | if (res) | |
241 | goto leave_me; | |
242 | /* file was successfully renamed, so: | |
243 | do not set attributes on old file - it no longer exists | |
244 | copy attributes from old file to new */ | |
245 | new_nwattr_changed = old_nwattr_changed; | |
246 | new_nwattr = old_nwattr; | |
247 | old_nwattr_changed = 0; | |
248 | ||
249 | leave_me:; | |
250 | if (old_nwattr_changed) { | |
251 | info.attributes = old_nwattr; | |
252 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(old_inode), old_inode, NULL, DM_ATTRIBUTES, &info); | |
253 | /* ignore errors */ | |
254 | } | |
255 | if (new_nwattr_changed) { | |
256 | info.attributes = new_nwattr; | |
257 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(new_dir), new_dir, _new_name, DM_ATTRIBUTES, &info); | |
258 | /* ignore errors */ | |
259 | } | |
260 | return(res); | |
261 | } | |
262 | #endif /* CONFIG_NCPFS_STRONG */ | |
263 | ||
264 | ||
265 | static int | |
266 | __ncp_lookup_validate(struct dentry * dentry, struct nameidata *nd) | |
267 | { | |
268 | struct ncp_server *server; | |
269 | struct dentry *parent; | |
270 | struct inode *dir; | |
271 | struct ncp_entry_info finfo; | |
272 | int res, val = 0, len; | |
273 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
274 | ||
275 | parent = dget_parent(dentry); | |
276 | dir = parent->d_inode; | |
277 | ||
278 | if (!dentry->d_inode) | |
279 | goto finished; | |
280 | ||
281 | server = NCP_SERVER(dir); | |
282 | ||
283 | if (!ncp_conn_valid(server)) | |
284 | goto finished; | |
285 | ||
286 | /* | |
287 | * Inspired by smbfs: | |
288 | * The default validation is based on dentry age: | |
289 | * We set the max age at mount time. (But each | |
290 | * successful server lookup renews the timestamp.) | |
291 | */ | |
292 | val = NCP_TEST_AGE(server, dentry); | |
293 | if (val) | |
294 | goto finished; | |
295 | ||
296 | DDPRINTK("ncp_lookup_validate: %s/%s not valid, age=%ld, server lookup\n", | |
297 | dentry->d_parent->d_name.name, dentry->d_name.name, | |
298 | NCP_GET_AGE(dentry)); | |
299 | ||
300 | len = sizeof(__name); | |
301 | if (ncp_is_server_root(dir)) { | |
302 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
303 | dentry->d_name.len, 1); | |
304 | if (!res) | |
305 | res = ncp_lookup_volume(server, __name, &(finfo.i)); | |
306 | } else { | |
307 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
308 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
309 | if (!res) | |
310 | res = ncp_obtain_info(server, dir, __name, &(finfo.i)); | |
311 | } | |
312 | finfo.volume = finfo.i.volNumber; | |
313 | DDPRINTK("ncp_lookup_validate: looked for %s/%s, res=%d\n", | |
314 | dentry->d_parent->d_name.name, __name, res); | |
315 | /* | |
316 | * If we didn't find it, or if it has a different dirEntNum to | |
317 | * what we remember, it's not valid any more. | |
318 | */ | |
319 | if (!res) { | |
320 | if (finfo.i.dirEntNum == NCP_FINFO(dentry->d_inode)->dirEntNum) { | |
321 | ncp_new_dentry(dentry); | |
322 | val=1; | |
323 | } else | |
324 | DDPRINTK("ncp_lookup_validate: found, but dirEntNum changed\n"); | |
325 | ||
326 | ncp_update_inode2(dentry->d_inode, &finfo); | |
327 | } | |
328 | ||
329 | finished: | |
330 | DDPRINTK("ncp_lookup_validate: result=%d\n", val); | |
331 | dput(parent); | |
332 | return val; | |
333 | } | |
334 | ||
335 | static int | |
336 | ncp_lookup_validate(struct dentry * dentry, struct nameidata *nd) | |
337 | { | |
338 | int res; | |
339 | lock_kernel(); | |
340 | res = __ncp_lookup_validate(dentry, nd); | |
341 | unlock_kernel(); | |
342 | return res; | |
343 | } | |
344 | ||
345 | static struct dentry * | |
346 | ncp_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos) | |
347 | { | |
348 | struct dentry *dent = dentry; | |
349 | struct list_head *next; | |
350 | ||
351 | if (d_validate(dent, parent)) { | |
352 | if (dent->d_name.len <= NCP_MAXPATHLEN && | |
353 | (unsigned long)dent->d_fsdata == fpos) { | |
354 | if (!dent->d_inode) { | |
355 | dput(dent); | |
356 | dent = NULL; | |
357 | } | |
358 | return dent; | |
359 | } | |
360 | dput(dent); | |
361 | } | |
362 | ||
363 | /* If a pointer is invalid, we search the dentry. */ | |
364 | spin_lock(&dcache_lock); | |
365 | next = parent->d_subdirs.next; | |
366 | while (next != &parent->d_subdirs) { | |
5160ee6f | 367 | dent = list_entry(next, struct dentry, d_u.d_child); |
1da177e4 LT |
368 | if ((unsigned long)dent->d_fsdata == fpos) { |
369 | if (dent->d_inode) | |
370 | dget_locked(dent); | |
371 | else | |
372 | dent = NULL; | |
373 | spin_unlock(&dcache_lock); | |
374 | goto out; | |
375 | } | |
376 | next = next->next; | |
377 | } | |
378 | spin_unlock(&dcache_lock); | |
379 | return NULL; | |
380 | ||
381 | out: | |
382 | return dent; | |
383 | } | |
384 | ||
385 | static time_t ncp_obtain_mtime(struct dentry *dentry) | |
386 | { | |
387 | struct inode *inode = dentry->d_inode; | |
388 | struct ncp_server *server = NCP_SERVER(inode); | |
389 | struct nw_info_struct i; | |
390 | ||
391 | if (!ncp_conn_valid(server) || ncp_is_server_root(inode)) | |
392 | return 0; | |
393 | ||
394 | if (ncp_obtain_info(server, inode, NULL, &i)) | |
395 | return 0; | |
396 | ||
397 | return ncp_date_dos2unix(i.modifyTime, i.modifyDate); | |
398 | } | |
399 | ||
400 | static int ncp_readdir(struct file *filp, void *dirent, filldir_t filldir) | |
401 | { | |
402 | struct dentry *dentry = filp->f_dentry; | |
403 | struct inode *inode = dentry->d_inode; | |
404 | struct page *page = NULL; | |
405 | struct ncp_server *server = NCP_SERVER(inode); | |
406 | union ncp_dir_cache *cache = NULL; | |
407 | struct ncp_cache_control ctl; | |
408 | int result, mtime_valid = 0; | |
409 | time_t mtime = 0; | |
410 | ||
411 | lock_kernel(); | |
412 | ||
413 | ctl.page = NULL; | |
414 | ctl.cache = NULL; | |
415 | ||
416 | DDPRINTK("ncp_readdir: reading %s/%s, pos=%d\n", | |
417 | dentry->d_parent->d_name.name, dentry->d_name.name, | |
418 | (int) filp->f_pos); | |
419 | ||
420 | result = -EIO; | |
421 | if (!ncp_conn_valid(server)) | |
422 | goto out; | |
423 | ||
424 | result = 0; | |
425 | if (filp->f_pos == 0) { | |
426 | if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR)) | |
427 | goto out; | |
428 | filp->f_pos = 1; | |
429 | } | |
430 | if (filp->f_pos == 1) { | |
431 | if (filldir(dirent, "..", 2, 1, parent_ino(dentry), DT_DIR)) | |
432 | goto out; | |
433 | filp->f_pos = 2; | |
434 | } | |
435 | ||
436 | page = grab_cache_page(&inode->i_data, 0); | |
437 | if (!page) | |
438 | goto read_really; | |
439 | ||
440 | ctl.cache = cache = kmap(page); | |
441 | ctl.head = cache->head; | |
442 | ||
443 | if (!PageUptodate(page) || !ctl.head.eof) | |
444 | goto init_cache; | |
445 | ||
446 | if (filp->f_pos == 2) { | |
447 | if (jiffies - ctl.head.time >= NCP_MAX_AGE(server)) | |
448 | goto init_cache; | |
449 | ||
450 | mtime = ncp_obtain_mtime(dentry); | |
451 | mtime_valid = 1; | |
452 | if ((!mtime) || (mtime != ctl.head.mtime)) | |
453 | goto init_cache; | |
454 | } | |
455 | ||
456 | if (filp->f_pos > ctl.head.end) | |
457 | goto finished; | |
458 | ||
459 | ctl.fpos = filp->f_pos + (NCP_DIRCACHE_START - 2); | |
460 | ctl.ofs = ctl.fpos / NCP_DIRCACHE_SIZE; | |
461 | ctl.idx = ctl.fpos % NCP_DIRCACHE_SIZE; | |
462 | ||
463 | for (;;) { | |
464 | if (ctl.ofs != 0) { | |
465 | ctl.page = find_lock_page(&inode->i_data, ctl.ofs); | |
466 | if (!ctl.page) | |
467 | goto invalid_cache; | |
468 | ctl.cache = kmap(ctl.page); | |
469 | if (!PageUptodate(ctl.page)) | |
470 | goto invalid_cache; | |
471 | } | |
472 | while (ctl.idx < NCP_DIRCACHE_SIZE) { | |
473 | struct dentry *dent; | |
474 | int res; | |
475 | ||
476 | dent = ncp_dget_fpos(ctl.cache->dentry[ctl.idx], | |
477 | dentry, filp->f_pos); | |
478 | if (!dent) | |
479 | goto invalid_cache; | |
480 | res = filldir(dirent, dent->d_name.name, | |
481 | dent->d_name.len, filp->f_pos, | |
482 | dent->d_inode->i_ino, DT_UNKNOWN); | |
483 | dput(dent); | |
484 | if (res) | |
485 | goto finished; | |
486 | filp->f_pos += 1; | |
487 | ctl.idx += 1; | |
488 | if (filp->f_pos > ctl.head.end) | |
489 | goto finished; | |
490 | } | |
491 | if (ctl.page) { | |
492 | kunmap(ctl.page); | |
493 | SetPageUptodate(ctl.page); | |
494 | unlock_page(ctl.page); | |
495 | page_cache_release(ctl.page); | |
496 | ctl.page = NULL; | |
497 | } | |
498 | ctl.idx = 0; | |
499 | ctl.ofs += 1; | |
500 | } | |
501 | invalid_cache: | |
502 | if (ctl.page) { | |
503 | kunmap(ctl.page); | |
504 | unlock_page(ctl.page); | |
505 | page_cache_release(ctl.page); | |
506 | ctl.page = NULL; | |
507 | } | |
508 | ctl.cache = cache; | |
509 | init_cache: | |
510 | ncp_invalidate_dircache_entries(dentry); | |
511 | if (!mtime_valid) { | |
512 | mtime = ncp_obtain_mtime(dentry); | |
513 | mtime_valid = 1; | |
514 | } | |
515 | ctl.head.mtime = mtime; | |
516 | ctl.head.time = jiffies; | |
517 | ctl.head.eof = 0; | |
518 | ctl.fpos = 2; | |
519 | ctl.ofs = 0; | |
520 | ctl.idx = NCP_DIRCACHE_START; | |
521 | ctl.filled = 0; | |
522 | ctl.valid = 1; | |
523 | read_really: | |
524 | if (ncp_is_server_root(inode)) { | |
525 | ncp_read_volume_list(filp, dirent, filldir, &ctl); | |
526 | } else { | |
527 | ncp_do_readdir(filp, dirent, filldir, &ctl); | |
528 | } | |
529 | ctl.head.end = ctl.fpos - 1; | |
530 | ctl.head.eof = ctl.valid; | |
531 | finished: | |
532 | if (page) { | |
533 | cache->head = ctl.head; | |
534 | kunmap(page); | |
535 | SetPageUptodate(page); | |
536 | unlock_page(page); | |
537 | page_cache_release(page); | |
538 | } | |
539 | if (ctl.page) { | |
540 | kunmap(ctl.page); | |
541 | SetPageUptodate(ctl.page); | |
542 | unlock_page(ctl.page); | |
543 | page_cache_release(ctl.page); | |
544 | } | |
545 | out: | |
546 | unlock_kernel(); | |
547 | return result; | |
548 | } | |
549 | ||
550 | static int | |
551 | ncp_fill_cache(struct file *filp, void *dirent, filldir_t filldir, | |
552 | struct ncp_cache_control *ctrl, struct ncp_entry_info *entry) | |
553 | { | |
554 | struct dentry *newdent, *dentry = filp->f_dentry; | |
555 | struct inode *newino, *inode = dentry->d_inode; | |
556 | struct ncp_cache_control ctl = *ctrl; | |
557 | struct qstr qname; | |
558 | int valid = 0; | |
559 | int hashed = 0; | |
560 | ino_t ino = 0; | |
561 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
562 | ||
563 | qname.len = sizeof(__name); | |
564 | if (ncp_vol2io(NCP_SERVER(inode), __name, &qname.len, | |
565 | entry->i.entryName, entry->i.nameLen, | |
566 | !ncp_preserve_entry_case(inode, entry->i.NSCreator))) | |
567 | return 1; /* I'm not sure */ | |
568 | ||
569 | qname.name = __name; | |
570 | qname.hash = full_name_hash(qname.name, qname.len); | |
571 | ||
572 | if (dentry->d_op && dentry->d_op->d_hash) | |
573 | if (dentry->d_op->d_hash(dentry, &qname) != 0) | |
574 | goto end_advance; | |
575 | ||
576 | newdent = d_lookup(dentry, &qname); | |
577 | ||
578 | if (!newdent) { | |
579 | newdent = d_alloc(dentry, &qname); | |
580 | if (!newdent) | |
581 | goto end_advance; | |
582 | } else { | |
583 | hashed = 1; | |
584 | memcpy((char *) newdent->d_name.name, qname.name, | |
585 | newdent->d_name.len); | |
586 | } | |
587 | ||
588 | if (!newdent->d_inode) { | |
589 | entry->opened = 0; | |
590 | entry->ino = iunique(inode->i_sb, 2); | |
591 | newino = ncp_iget(inode->i_sb, entry); | |
592 | if (newino) { | |
593 | newdent->d_op = &ncp_dentry_operations; | |
594 | d_instantiate(newdent, newino); | |
595 | if (!hashed) | |
596 | d_rehash(newdent); | |
597 | } | |
598 | } else | |
599 | ncp_update_inode2(newdent->d_inode, entry); | |
600 | ||
601 | if (newdent->d_inode) { | |
602 | ino = newdent->d_inode->i_ino; | |
603 | newdent->d_fsdata = (void *) ctl.fpos; | |
604 | ncp_new_dentry(newdent); | |
605 | } | |
606 | ||
607 | if (ctl.idx >= NCP_DIRCACHE_SIZE) { | |
608 | if (ctl.page) { | |
609 | kunmap(ctl.page); | |
610 | SetPageUptodate(ctl.page); | |
611 | unlock_page(ctl.page); | |
612 | page_cache_release(ctl.page); | |
613 | } | |
614 | ctl.cache = NULL; | |
615 | ctl.idx -= NCP_DIRCACHE_SIZE; | |
616 | ctl.ofs += 1; | |
617 | ctl.page = grab_cache_page(&inode->i_data, ctl.ofs); | |
618 | if (ctl.page) | |
619 | ctl.cache = kmap(ctl.page); | |
620 | } | |
621 | if (ctl.cache) { | |
622 | ctl.cache->dentry[ctl.idx] = newdent; | |
623 | valid = 1; | |
624 | } | |
625 | dput(newdent); | |
626 | end_advance: | |
627 | if (!valid) | |
628 | ctl.valid = 0; | |
629 | if (!ctl.filled && (ctl.fpos == filp->f_pos)) { | |
630 | if (!ino) | |
631 | ino = find_inode_number(dentry, &qname); | |
632 | if (!ino) | |
633 | ino = iunique(inode->i_sb, 2); | |
634 | ctl.filled = filldir(dirent, qname.name, qname.len, | |
635 | filp->f_pos, ino, DT_UNKNOWN); | |
636 | if (!ctl.filled) | |
637 | filp->f_pos += 1; | |
638 | } | |
639 | ctl.fpos += 1; | |
640 | ctl.idx += 1; | |
641 | *ctrl = ctl; | |
642 | return (ctl.valid || !ctl.filled); | |
643 | } | |
644 | ||
645 | static void | |
646 | ncp_read_volume_list(struct file *filp, void *dirent, filldir_t filldir, | |
647 | struct ncp_cache_control *ctl) | |
648 | { | |
649 | struct dentry *dentry = filp->f_dentry; | |
650 | struct inode *inode = dentry->d_inode; | |
651 | struct ncp_server *server = NCP_SERVER(inode); | |
652 | struct ncp_volume_info info; | |
653 | struct ncp_entry_info entry; | |
654 | int i; | |
655 | ||
656 | DPRINTK("ncp_read_volume_list: pos=%ld\n", | |
657 | (unsigned long) filp->f_pos); | |
658 | ||
659 | for (i = 0; i < NCP_NUMBER_OF_VOLUMES; i++) { | |
660 | ||
661 | if (ncp_get_volume_info_with_number(server, i, &info) != 0) | |
662 | return; | |
663 | if (!strlen(info.volume_name)) | |
664 | continue; | |
665 | ||
666 | DPRINTK("ncp_read_volume_list: found vol: %s\n", | |
667 | info.volume_name); | |
668 | ||
669 | if (ncp_lookup_volume(server, info.volume_name, | |
670 | &entry.i)) { | |
671 | DPRINTK("ncpfs: could not lookup vol %s\n", | |
672 | info.volume_name); | |
673 | continue; | |
674 | } | |
675 | entry.volume = entry.i.volNumber; | |
676 | if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry)) | |
677 | return; | |
678 | } | |
679 | } | |
680 | ||
681 | static void | |
682 | ncp_do_readdir(struct file *filp, void *dirent, filldir_t filldir, | |
683 | struct ncp_cache_control *ctl) | |
684 | { | |
685 | struct dentry *dentry = filp->f_dentry; | |
686 | struct inode *dir = dentry->d_inode; | |
687 | struct ncp_server *server = NCP_SERVER(dir); | |
688 | struct nw_search_sequence seq; | |
689 | struct ncp_entry_info entry; | |
690 | int err; | |
691 | void* buf; | |
692 | int more; | |
693 | size_t bufsize; | |
694 | ||
695 | DPRINTK("ncp_do_readdir: %s/%s, fpos=%ld\n", | |
696 | dentry->d_parent->d_name.name, dentry->d_name.name, | |
697 | (unsigned long) filp->f_pos); | |
698 | PPRINTK("ncp_do_readdir: init %s, volnum=%d, dirent=%u\n", | |
699 | dentry->d_name.name, NCP_FINFO(dir)->volNumber, | |
700 | NCP_FINFO(dir)->dirEntNum); | |
701 | ||
702 | err = ncp_initialize_search(server, dir, &seq); | |
703 | if (err) { | |
704 | DPRINTK("ncp_do_readdir: init failed, err=%d\n", err); | |
705 | return; | |
706 | } | |
1da177e4 LT |
707 | /* We MUST NOT use server->buffer_size handshaked with server if we are |
708 | using UDP, as for UDP server uses max. buffer size determined by | |
709 | MTU, and for TCP server uses hardwired value 65KB (== 66560 bytes). | |
710 | So we use 128KB, just to be sure, as there is no way how to know | |
711 | this value in advance. */ | |
712 | bufsize = 131072; | |
713 | buf = vmalloc(bufsize); | |
714 | if (!buf) | |
715 | return; | |
716 | do { | |
717 | int cnt; | |
718 | char* rpl; | |
719 | size_t rpls; | |
720 | ||
721 | err = ncp_search_for_fileset(server, &seq, &more, &cnt, buf, bufsize, &rpl, &rpls); | |
722 | if (err) /* Error */ | |
723 | break; | |
724 | if (!cnt) /* prevent endless loop */ | |
725 | break; | |
726 | while (cnt--) { | |
727 | size_t onerpl; | |
728 | ||
729 | if (rpls < offsetof(struct nw_info_struct, entryName)) | |
730 | break; /* short packet */ | |
731 | ncp_extract_file_info(rpl, &entry.i); | |
732 | onerpl = offsetof(struct nw_info_struct, entryName) + entry.i.nameLen; | |
733 | if (rpls < onerpl) | |
734 | break; /* short packet */ | |
735 | (void)ncp_obtain_nfs_info(server, &entry.i); | |
736 | rpl += onerpl; | |
737 | rpls -= onerpl; | |
738 | entry.volume = entry.i.volNumber; | |
739 | if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry)) | |
740 | break; | |
741 | } | |
742 | } while (more); | |
743 | vfree(buf); | |
1da177e4 LT |
744 | return; |
745 | } | |
746 | ||
747 | int ncp_conn_logged_in(struct super_block *sb) | |
748 | { | |
749 | struct ncp_server* server = NCP_SBP(sb); | |
750 | int result; | |
751 | ||
752 | if (ncp_single_volume(server)) { | |
753 | int len; | |
754 | struct dentry* dent; | |
755 | __u32 volNumber; | |
756 | __le32 dirEntNum; | |
757 | __le32 DosDirNum; | |
758 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
759 | ||
760 | len = sizeof(__name); | |
761 | result = ncp_io2vol(server, __name, &len, server->m.mounted_vol, | |
762 | strlen(server->m.mounted_vol), 1); | |
763 | if (result) | |
764 | goto out; | |
765 | result = -ENOENT; | |
766 | if (ncp_get_volume_root(server, __name, &volNumber, &dirEntNum, &DosDirNum)) { | |
767 | PPRINTK("ncp_conn_logged_in: %s not found\n", | |
768 | server->m.mounted_vol); | |
769 | goto out; | |
770 | } | |
771 | dent = sb->s_root; | |
772 | if (dent) { | |
773 | struct inode* ino = dent->d_inode; | |
774 | if (ino) { | |
775 | NCP_FINFO(ino)->volNumber = volNumber; | |
776 | NCP_FINFO(ino)->dirEntNum = dirEntNum; | |
777 | NCP_FINFO(ino)->DosDirNum = DosDirNum; | |
778 | } else { | |
779 | DPRINTK("ncpfs: sb->s_root->d_inode == NULL!\n"); | |
780 | } | |
781 | } else { | |
782 | DPRINTK("ncpfs: sb->s_root == NULL!\n"); | |
783 | } | |
784 | } | |
785 | result = 0; | |
786 | ||
787 | out: | |
788 | return result; | |
789 | } | |
790 | ||
791 | static struct dentry *ncp_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) | |
792 | { | |
793 | struct ncp_server *server = NCP_SERVER(dir); | |
794 | struct inode *inode = NULL; | |
795 | struct ncp_entry_info finfo; | |
796 | int error, res, len; | |
797 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
798 | ||
799 | lock_kernel(); | |
800 | error = -EIO; | |
801 | if (!ncp_conn_valid(server)) | |
802 | goto finished; | |
803 | ||
804 | PPRINTK("ncp_lookup: server lookup for %s/%s\n", | |
805 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
806 | ||
807 | len = sizeof(__name); | |
808 | if (ncp_is_server_root(dir)) { | |
809 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
810 | dentry->d_name.len, 1); | |
811 | if (!res) | |
812 | res = ncp_lookup_volume(server, __name, &(finfo.i)); | |
813 | } else { | |
814 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
815 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
816 | if (!res) | |
817 | res = ncp_obtain_info(server, dir, __name, &(finfo.i)); | |
818 | } | |
819 | PPRINTK("ncp_lookup: looked for %s/%s, res=%d\n", | |
820 | dentry->d_parent->d_name.name, __name, res); | |
821 | /* | |
822 | * If we didn't find an entry, make a negative dentry. | |
823 | */ | |
824 | if (res) | |
825 | goto add_entry; | |
826 | ||
827 | /* | |
828 | * Create an inode for the entry. | |
829 | */ | |
830 | finfo.opened = 0; | |
831 | finfo.ino = iunique(dir->i_sb, 2); | |
832 | finfo.volume = finfo.i.volNumber; | |
833 | error = -EACCES; | |
834 | inode = ncp_iget(dir->i_sb, &finfo); | |
835 | ||
836 | if (inode) { | |
837 | ncp_new_dentry(dentry); | |
838 | add_entry: | |
839 | dentry->d_op = &ncp_dentry_operations; | |
840 | d_add(dentry, inode); | |
841 | error = 0; | |
842 | } | |
843 | ||
844 | finished: | |
845 | PPRINTK("ncp_lookup: result=%d\n", error); | |
846 | unlock_kernel(); | |
847 | return ERR_PTR(error); | |
848 | } | |
849 | ||
850 | /* | |
851 | * This code is common to create, mkdir, and mknod. | |
852 | */ | |
853 | static int ncp_instantiate(struct inode *dir, struct dentry *dentry, | |
854 | struct ncp_entry_info *finfo) | |
855 | { | |
856 | struct inode *inode; | |
857 | int error = -EINVAL; | |
858 | ||
859 | finfo->ino = iunique(dir->i_sb, 2); | |
860 | inode = ncp_iget(dir->i_sb, finfo); | |
861 | if (!inode) | |
862 | goto out_close; | |
863 | d_instantiate(dentry,inode); | |
864 | error = 0; | |
865 | out: | |
866 | return error; | |
867 | ||
868 | out_close: | |
869 | PPRINTK("ncp_instantiate: %s/%s failed, closing file\n", | |
870 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
871 | ncp_close_file(NCP_SERVER(dir), finfo->file_handle); | |
872 | goto out; | |
873 | } | |
874 | ||
875 | int ncp_create_new(struct inode *dir, struct dentry *dentry, int mode, | |
876 | dev_t rdev, __le32 attributes) | |
877 | { | |
878 | struct ncp_server *server = NCP_SERVER(dir); | |
879 | struct ncp_entry_info finfo; | |
880 | int error, result, len; | |
881 | int opmode; | |
882 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
883 | ||
884 | PPRINTK("ncp_create_new: creating %s/%s, mode=%x\n", | |
885 | dentry->d_parent->d_name.name, dentry->d_name.name, mode); | |
886 | ||
887 | error = -EIO; | |
888 | lock_kernel(); | |
889 | if (!ncp_conn_valid(server)) | |
890 | goto out; | |
891 | ||
892 | ncp_age_dentry(server, dentry); | |
893 | len = sizeof(__name); | |
894 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
895 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
896 | if (error) | |
897 | goto out; | |
898 | ||
899 | error = -EACCES; | |
900 | ||
901 | if (S_ISREG(mode) && | |
902 | (server->m.flags & NCP_MOUNT_EXTRAS) && | |
903 | (mode & S_IXUGO)) | |
904 | attributes |= aSYSTEM | aSHARED; | |
905 | ||
906 | result = ncp_open_create_file_or_subdir(server, dir, __name, | |
907 | OC_MODE_CREATE | OC_MODE_OPEN | OC_MODE_REPLACE, | |
908 | attributes, AR_READ | AR_WRITE, &finfo); | |
909 | opmode = O_RDWR; | |
910 | if (result) { | |
911 | result = ncp_open_create_file_or_subdir(server, dir, __name, | |
912 | OC_MODE_CREATE | OC_MODE_OPEN | OC_MODE_REPLACE, | |
913 | attributes, AR_WRITE, &finfo); | |
914 | if (result) { | |
915 | if (result == 0x87) | |
916 | error = -ENAMETOOLONG; | |
917 | DPRINTK("ncp_create: %s/%s failed\n", | |
918 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
919 | goto out; | |
920 | } | |
921 | opmode = O_WRONLY; | |
922 | } | |
923 | finfo.access = opmode; | |
924 | if (ncp_is_nfs_extras(server, finfo.volume)) { | |
925 | finfo.i.nfs.mode = mode; | |
926 | finfo.i.nfs.rdev = new_encode_dev(rdev); | |
927 | if (ncp_modify_nfs_info(server, finfo.volume, | |
928 | finfo.i.dirEntNum, | |
929 | mode, new_encode_dev(rdev)) != 0) | |
930 | goto out; | |
931 | } | |
932 | ||
933 | error = ncp_instantiate(dir, dentry, &finfo); | |
934 | out: | |
935 | unlock_kernel(); | |
936 | return error; | |
937 | } | |
938 | ||
939 | static int ncp_create(struct inode *dir, struct dentry *dentry, int mode, | |
940 | struct nameidata *nd) | |
941 | { | |
942 | return ncp_create_new(dir, dentry, mode, 0, 0); | |
943 | } | |
944 | ||
945 | static int ncp_mkdir(struct inode *dir, struct dentry *dentry, int mode) | |
946 | { | |
947 | struct ncp_entry_info finfo; | |
948 | struct ncp_server *server = NCP_SERVER(dir); | |
949 | int error, len; | |
950 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
951 | ||
952 | DPRINTK("ncp_mkdir: making %s/%s\n", | |
953 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
954 | ||
955 | error = -EIO; | |
956 | lock_kernel(); | |
957 | if (!ncp_conn_valid(server)) | |
958 | goto out; | |
959 | ||
960 | ncp_age_dentry(server, dentry); | |
961 | len = sizeof(__name); | |
962 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
963 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
964 | if (error) | |
965 | goto out; | |
966 | ||
967 | error = -EACCES; | |
968 | if (ncp_open_create_file_or_subdir(server, dir, __name, | |
969 | OC_MODE_CREATE, aDIR, | |
970 | cpu_to_le16(0xffff), | |
971 | &finfo) == 0) | |
972 | { | |
973 | if (ncp_is_nfs_extras(server, finfo.volume)) { | |
974 | mode |= S_IFDIR; | |
975 | finfo.i.nfs.mode = mode; | |
976 | if (ncp_modify_nfs_info(server, | |
977 | finfo.volume, | |
978 | finfo.i.dirEntNum, | |
979 | mode, 0) != 0) | |
980 | goto out; | |
981 | } | |
982 | error = ncp_instantiate(dir, dentry, &finfo); | |
983 | } | |
984 | out: | |
985 | unlock_kernel(); | |
986 | return error; | |
987 | } | |
988 | ||
989 | static int ncp_rmdir(struct inode *dir, struct dentry *dentry) | |
990 | { | |
991 | struct ncp_server *server = NCP_SERVER(dir); | |
992 | int error, result, len; | |
993 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
994 | ||
995 | DPRINTK("ncp_rmdir: removing %s/%s\n", | |
996 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
997 | ||
998 | error = -EIO; | |
999 | lock_kernel(); | |
1000 | if (!ncp_conn_valid(server)) | |
1001 | goto out; | |
1002 | ||
1003 | error = -EBUSY; | |
1004 | if (!d_unhashed(dentry)) | |
1005 | goto out; | |
1006 | ||
1007 | len = sizeof(__name); | |
1008 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
1009 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
1010 | if (error) | |
1011 | goto out; | |
1012 | ||
1013 | result = ncp_del_file_or_subdir(server, dir, __name); | |
1014 | switch (result) { | |
1015 | case 0x00: | |
1016 | error = 0; | |
1017 | break; | |
1018 | case 0x85: /* unauthorized to delete file */ | |
1019 | case 0x8A: /* unauthorized to delete file */ | |
1020 | error = -EACCES; | |
1021 | break; | |
1022 | case 0x8F: | |
1023 | case 0x90: /* read only */ | |
1024 | error = -EPERM; | |
1025 | break; | |
1026 | case 0x9F: /* in use by another client */ | |
1027 | error = -EBUSY; | |
1028 | break; | |
1029 | case 0xA0: /* directory not empty */ | |
1030 | error = -ENOTEMPTY; | |
1031 | break; | |
1032 | case 0xFF: /* someone deleted file */ | |
1033 | error = -ENOENT; | |
1034 | break; | |
1035 | default: | |
1036 | error = -EACCES; | |
1037 | break; | |
1038 | } | |
1039 | out: | |
1040 | unlock_kernel(); | |
1041 | return error; | |
1042 | } | |
1043 | ||
1044 | static int ncp_unlink(struct inode *dir, struct dentry *dentry) | |
1045 | { | |
1046 | struct inode *inode = dentry->d_inode; | |
1047 | struct ncp_server *server; | |
1048 | int error; | |
1049 | ||
1050 | lock_kernel(); | |
1051 | server = NCP_SERVER(dir); | |
1052 | DPRINTK("ncp_unlink: unlinking %s/%s\n", | |
1053 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
1054 | ||
1055 | error = -EIO; | |
1056 | if (!ncp_conn_valid(server)) | |
1057 | goto out; | |
1058 | ||
1059 | /* | |
1060 | * Check whether to close the file ... | |
1061 | */ | |
1062 | if (inode) { | |
1063 | PPRINTK("ncp_unlink: closing file\n"); | |
1064 | ncp_make_closed(inode); | |
1065 | } | |
1066 | ||
1067 | error = ncp_del_file_or_subdir2(server, dentry); | |
1068 | #ifdef CONFIG_NCPFS_STRONG | |
1069 | /* 9C is Invalid path.. It should be 8F, 90 - read only, but | |
1070 | it is not :-( */ | |
1071 | if ((error == 0x9C || error == 0x90) && server->m.flags & NCP_MOUNT_STRONG) { /* R/O */ | |
1072 | error = ncp_force_unlink(dir, dentry); | |
1073 | } | |
1074 | #endif | |
1075 | switch (error) { | |
1076 | case 0x00: | |
1077 | DPRINTK("ncp: removed %s/%s\n", | |
1078 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
1079 | break; | |
1080 | case 0x85: | |
1081 | case 0x8A: | |
1082 | error = -EACCES; | |
1083 | break; | |
1084 | case 0x8D: /* some files in use */ | |
1085 | case 0x8E: /* all files in use */ | |
1086 | error = -EBUSY; | |
1087 | break; | |
1088 | case 0x8F: /* some read only */ | |
1089 | case 0x90: /* all read only */ | |
1090 | case 0x9C: /* !!! returned when in-use or read-only by NW4 */ | |
1091 | error = -EPERM; | |
1092 | break; | |
1093 | case 0xFF: | |
1094 | error = -ENOENT; | |
1095 | break; | |
1096 | default: | |
1097 | error = -EACCES; | |
1098 | break; | |
1099 | } | |
1100 | ||
1101 | out: | |
1102 | unlock_kernel(); | |
1103 | return error; | |
1104 | } | |
1105 | ||
1106 | static int ncp_rename(struct inode *old_dir, struct dentry *old_dentry, | |
1107 | struct inode *new_dir, struct dentry *new_dentry) | |
1108 | { | |
1109 | struct ncp_server *server = NCP_SERVER(old_dir); | |
1110 | int error; | |
1111 | int old_len, new_len; | |
1112 | __u8 __old_name[NCP_MAXPATHLEN + 1], __new_name[NCP_MAXPATHLEN + 1]; | |
1113 | ||
1114 | DPRINTK("ncp_rename: %s/%s to %s/%s\n", | |
1115 | old_dentry->d_parent->d_name.name, old_dentry->d_name.name, | |
1116 | new_dentry->d_parent->d_name.name, new_dentry->d_name.name); | |
1117 | ||
1118 | error = -EIO; | |
1119 | lock_kernel(); | |
1120 | if (!ncp_conn_valid(server)) | |
1121 | goto out; | |
1122 | ||
1123 | ncp_age_dentry(server, old_dentry); | |
1124 | ncp_age_dentry(server, new_dentry); | |
1125 | ||
1126 | old_len = sizeof(__old_name); | |
1127 | error = ncp_io2vol(server, __old_name, &old_len, | |
1128 | old_dentry->d_name.name, old_dentry->d_name.len, | |
1129 | !ncp_preserve_case(old_dir)); | |
1130 | if (error) | |
1131 | goto out; | |
1132 | ||
1133 | new_len = sizeof(__new_name); | |
1134 | error = ncp_io2vol(server, __new_name, &new_len, | |
1135 | new_dentry->d_name.name, new_dentry->d_name.len, | |
1136 | !ncp_preserve_case(new_dir)); | |
1137 | if (error) | |
1138 | goto out; | |
1139 | ||
1140 | error = ncp_ren_or_mov_file_or_subdir(server, old_dir, __old_name, | |
1141 | new_dir, __new_name); | |
1142 | #ifdef CONFIG_NCPFS_STRONG | |
1143 | if ((error == 0x90 || error == 0x8B || error == -EACCES) && | |
1144 | server->m.flags & NCP_MOUNT_STRONG) { /* RO */ | |
1145 | error = ncp_force_rename(old_dir, old_dentry, __old_name, | |
1146 | new_dir, new_dentry, __new_name); | |
1147 | } | |
1148 | #endif | |
1149 | switch (error) { | |
1150 | case 0x00: | |
1151 | DPRINTK("ncp renamed %s -> %s.\n", | |
1152 | old_dentry->d_name.name,new_dentry->d_name.name); | |
1153 | break; | |
1154 | case 0x9E: | |
1155 | error = -ENAMETOOLONG; | |
1156 | break; | |
1157 | case 0xFF: | |
1158 | error = -ENOENT; | |
1159 | break; | |
1160 | default: | |
1161 | error = -EACCES; | |
1162 | break; | |
1163 | } | |
1164 | out: | |
1165 | unlock_kernel(); | |
1166 | return error; | |
1167 | } | |
1168 | ||
1169 | static int ncp_mknod(struct inode * dir, struct dentry *dentry, | |
1170 | int mode, dev_t rdev) | |
1171 | { | |
1172 | if (!new_valid_dev(rdev)) | |
1173 | return -EINVAL; | |
1174 | if (ncp_is_nfs_extras(NCP_SERVER(dir), NCP_FINFO(dir)->volNumber)) { | |
1175 | DPRINTK(KERN_DEBUG "ncp_mknod: mode = 0%o\n", mode); | |
1176 | return ncp_create_new(dir, dentry, mode, rdev, 0); | |
1177 | } | |
1178 | return -EPERM; /* Strange, but true */ | |
1179 | } | |
1180 | ||
1181 | /* The following routines are taken directly from msdos-fs */ | |
1182 | ||
1183 | /* Linear day numbers of the respective 1sts in non-leap years. */ | |
1184 | ||
1185 | static int day_n[] = | |
1186 | {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, 0}; | |
1187 | /* Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec */ | |
1188 | ||
1189 | ||
1190 | extern struct timezone sys_tz; | |
1191 | ||
1192 | static int utc2local(int time) | |
1193 | { | |
1194 | return time - sys_tz.tz_minuteswest * 60; | |
1195 | } | |
1196 | ||
1197 | static int local2utc(int time) | |
1198 | { | |
1199 | return time + sys_tz.tz_minuteswest * 60; | |
1200 | } | |
1201 | ||
1202 | /* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */ | |
1203 | int | |
1204 | ncp_date_dos2unix(__le16 t, __le16 d) | |
1205 | { | |
1206 | unsigned short time = le16_to_cpu(t), date = le16_to_cpu(d); | |
1207 | int month, year, secs; | |
1208 | ||
1209 | /* first subtract and mask after that... Otherwise, if | |
1210 | date == 0, bad things happen */ | |
1211 | month = ((date >> 5) - 1) & 15; | |
1212 | year = date >> 9; | |
1213 | secs = (time & 31) * 2 + 60 * ((time >> 5) & 63) + (time >> 11) * 3600 + | |
1214 | 86400 * ((date & 31) - 1 + day_n[month] + (year / 4) + | |
1215 | year * 365 - ((year & 3) == 0 && month < 2 ? 1 : 0) + 3653); | |
1216 | /* days since 1.1.70 plus 80's leap day */ | |
1217 | return local2utc(secs); | |
1218 | } | |
1219 | ||
1220 | ||
1221 | /* Convert linear UNIX date to a MS-DOS time/date pair. */ | |
1222 | void | |
1223 | ncp_date_unix2dos(int unix_date, __le16 *time, __le16 *date) | |
1224 | { | |
1225 | int day, year, nl_day, month; | |
1226 | ||
1227 | unix_date = utc2local(unix_date); | |
1228 | *time = cpu_to_le16( | |
1229 | (unix_date % 60) / 2 + (((unix_date / 60) % 60) << 5) + | |
1230 | (((unix_date / 3600) % 24) << 11)); | |
1231 | day = unix_date / 86400 - 3652; | |
1232 | year = day / 365; | |
1233 | if ((year + 3) / 4 + 365 * year > day) | |
1234 | year--; | |
1235 | day -= (year + 3) / 4 + 365 * year; | |
1236 | if (day == 59 && !(year & 3)) { | |
1237 | nl_day = day; | |
1238 | month = 2; | |
1239 | } else { | |
1240 | nl_day = (year & 3) || day <= 59 ? day : day - 1; | |
1241 | for (month = 0; month < 12; month++) | |
1242 | if (day_n[month] > nl_day) | |
1243 | break; | |
1244 | } | |
1245 | *date = cpu_to_le16(nl_day - day_n[month - 1] + 1 + (month << 5) + (year << 9)); | |
1246 | } |