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 | ||
13 | #include <linux/config.h> | |
14 | ||
15 | #include <linux/time.h> | |
16 | #include <linux/errno.h> | |
17 | #include <linux/stat.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/vmalloc.h> | |
21 | #include <linux/mm.h> | |
22 | #include <asm/uaccess.h> | |
23 | #include <asm/byteorder.h> | |
24 | #include <linux/smp_lock.h> | |
25 | ||
26 | #include <linux/ncp_fs.h> | |
27 | ||
28 | #include "ncplib_kernel.h" | |
29 | ||
30 | static void ncp_read_volume_list(struct file *, void *, filldir_t, | |
31 | struct ncp_cache_control *); | |
32 | static void ncp_do_readdir(struct file *, void *, filldir_t, | |
33 | struct ncp_cache_control *); | |
34 | ||
35 | static int ncp_readdir(struct file *, void *, filldir_t); | |
36 | ||
37 | static int ncp_create(struct inode *, struct dentry *, int, struct nameidata *); | |
38 | static struct dentry *ncp_lookup(struct inode *, struct dentry *, struct nameidata *); | |
39 | static int ncp_unlink(struct inode *, struct dentry *); | |
40 | static int ncp_mkdir(struct inode *, struct dentry *, int); | |
41 | static int ncp_rmdir(struct inode *, struct dentry *); | |
42 | static int ncp_rename(struct inode *, struct dentry *, | |
43 | struct inode *, struct dentry *); | |
44 | static int ncp_mknod(struct inode * dir, struct dentry *dentry, | |
45 | int mode, dev_t rdev); | |
46 | #if defined(CONFIG_NCPFS_EXTRAS) || defined(CONFIG_NCPFS_NFS_NS) | |
47 | extern int ncp_symlink(struct inode *, struct dentry *, const char *); | |
48 | #else | |
49 | #define ncp_symlink NULL | |
50 | #endif | |
51 | ||
4b6f5d20 | 52 | const struct file_operations ncp_dir_operations = |
1da177e4 LT |
53 | { |
54 | .read = generic_read_dir, | |
55 | .readdir = ncp_readdir, | |
56 | .ioctl = ncp_ioctl, | |
57 | }; | |
58 | ||
59 | struct inode_operations ncp_dir_inode_operations = | |
60 | { | |
61 | .create = ncp_create, | |
62 | .lookup = ncp_lookup, | |
63 | .unlink = ncp_unlink, | |
64 | .symlink = ncp_symlink, | |
65 | .mkdir = ncp_mkdir, | |
66 | .rmdir = ncp_rmdir, | |
67 | .mknod = ncp_mknod, | |
68 | .rename = ncp_rename, | |
69 | .setattr = ncp_notify_change, | |
70 | }; | |
71 | ||
72 | /* | |
73 | * Dentry operations routines | |
74 | */ | |
75 | static int ncp_lookup_validate(struct dentry *, struct nameidata *); | |
76 | static int ncp_hash_dentry(struct dentry *, struct qstr *); | |
77 | static int ncp_compare_dentry (struct dentry *, struct qstr *, struct qstr *); | |
78 | static int ncp_delete_dentry(struct dentry *); | |
79 | ||
80 | static struct dentry_operations ncp_dentry_operations = | |
81 | { | |
82 | .d_revalidate = ncp_lookup_validate, | |
83 | .d_hash = ncp_hash_dentry, | |
84 | .d_compare = ncp_compare_dentry, | |
85 | .d_delete = ncp_delete_dentry, | |
86 | }; | |
87 | ||
88 | struct dentry_operations ncp_root_dentry_operations = | |
89 | { | |
90 | .d_hash = ncp_hash_dentry, | |
91 | .d_compare = ncp_compare_dentry, | |
92 | .d_delete = ncp_delete_dentry, | |
93 | }; | |
94 | ||
95 | ||
96 | /* | |
97 | * Note: leave the hash unchanged if the directory | |
98 | * is case-sensitive. | |
99 | */ | |
100 | static int | |
101 | ncp_hash_dentry(struct dentry *dentry, struct qstr *this) | |
102 | { | |
103 | struct nls_table *t; | |
104 | unsigned long hash; | |
105 | int i; | |
106 | ||
107 | t = NCP_IO_TABLE(dentry); | |
108 | ||
109 | if (!ncp_case_sensitive(dentry->d_inode)) { | |
110 | hash = init_name_hash(); | |
111 | for (i=0; i<this->len ; i++) | |
112 | hash = partial_name_hash(ncp_tolower(t, this->name[i]), | |
113 | hash); | |
114 | this->hash = end_name_hash(hash); | |
115 | } | |
116 | return 0; | |
117 | } | |
118 | ||
119 | static int | |
120 | ncp_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b) | |
121 | { | |
122 | if (a->len != b->len) | |
123 | return 1; | |
124 | ||
125 | if (ncp_case_sensitive(dentry->d_inode)) | |
126 | return strncmp(a->name, b->name, a->len); | |
127 | ||
128 | return ncp_strnicmp(NCP_IO_TABLE(dentry), a->name, b->name, a->len); | |
129 | } | |
130 | ||
131 | /* | |
132 | * This is the callback from dput() when d_count is going to 0. | |
133 | * We use this to unhash dentries with bad inodes. | |
134 | * Closing files can be safely postponed until iput() - it's done there anyway. | |
135 | */ | |
136 | static int | |
137 | ncp_delete_dentry(struct dentry * dentry) | |
138 | { | |
139 | struct inode *inode = dentry->d_inode; | |
140 | ||
141 | if (inode) { | |
142 | if (is_bad_inode(inode)) | |
143 | return 1; | |
144 | } else | |
145 | { | |
146 | /* N.B. Unhash negative dentries? */ | |
147 | } | |
148 | return 0; | |
149 | } | |
150 | ||
151 | static inline int | |
152 | ncp_single_volume(struct ncp_server *server) | |
153 | { | |
154 | return (server->m.mounted_vol[0] != '\0'); | |
155 | } | |
156 | ||
157 | static inline int ncp_is_server_root(struct inode *inode) | |
158 | { | |
159 | return (!ncp_single_volume(NCP_SERVER(inode)) && | |
160 | inode == inode->i_sb->s_root->d_inode); | |
161 | } | |
162 | ||
163 | ||
164 | /* | |
165 | * This is the callback when the dcache has a lookup hit. | |
166 | */ | |
167 | ||
168 | ||
169 | #ifdef CONFIG_NCPFS_STRONG | |
170 | /* try to delete a readonly file (NW R bit set) */ | |
171 | ||
172 | static int | |
173 | ncp_force_unlink(struct inode *dir, struct dentry* dentry) | |
174 | { | |
175 | int res=0x9c,res2; | |
176 | struct nw_modify_dos_info info; | |
177 | __le32 old_nwattr; | |
178 | struct inode *inode; | |
179 | ||
180 | memset(&info, 0, sizeof(info)); | |
181 | ||
182 | /* remove the Read-Only flag on the NW server */ | |
183 | inode = dentry->d_inode; | |
184 | ||
185 | old_nwattr = NCP_FINFO(inode)->nwattr; | |
186 | info.attributes = old_nwattr & ~(aRONLY|aDELETEINHIBIT|aRENAMEINHIBIT); | |
187 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(inode), inode, NULL, DM_ATTRIBUTES, &info); | |
188 | if (res2) | |
189 | goto leave_me; | |
190 | ||
191 | /* now try again the delete operation */ | |
192 | res = ncp_del_file_or_subdir2(NCP_SERVER(dir), dentry); | |
193 | ||
194 | if (res) /* delete failed, set R bit again */ | |
195 | { | |
196 | info.attributes = old_nwattr; | |
197 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(inode), inode, NULL, DM_ATTRIBUTES, &info); | |
198 | if (res2) | |
199 | goto leave_me; | |
200 | } | |
201 | leave_me: | |
202 | return(res); | |
203 | } | |
204 | #endif /* CONFIG_NCPFS_STRONG */ | |
205 | ||
206 | #ifdef CONFIG_NCPFS_STRONG | |
207 | static int | |
208 | ncp_force_rename(struct inode *old_dir, struct dentry* old_dentry, char *_old_name, | |
209 | struct inode *new_dir, struct dentry* new_dentry, char *_new_name) | |
210 | { | |
211 | struct nw_modify_dos_info info; | |
212 | int res=0x90,res2; | |
213 | struct inode *old_inode = old_dentry->d_inode; | |
214 | __le32 old_nwattr = NCP_FINFO(old_inode)->nwattr; | |
215 | __le32 new_nwattr = 0; /* shut compiler warning */ | |
216 | int old_nwattr_changed = 0; | |
217 | int new_nwattr_changed = 0; | |
218 | ||
219 | memset(&info, 0, sizeof(info)); | |
220 | ||
221 | /* remove the Read-Only flag on the NW server */ | |
222 | ||
223 | info.attributes = old_nwattr & ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT); | |
224 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(old_inode), old_inode, NULL, DM_ATTRIBUTES, &info); | |
225 | if (!res2) | |
226 | old_nwattr_changed = 1; | |
227 | if (new_dentry && new_dentry->d_inode) { | |
228 | new_nwattr = NCP_FINFO(new_dentry->d_inode)->nwattr; | |
229 | info.attributes = new_nwattr & ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT); | |
230 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(new_dir), new_dir, _new_name, DM_ATTRIBUTES, &info); | |
231 | if (!res2) | |
232 | new_nwattr_changed = 1; | |
233 | } | |
234 | /* now try again the rename operation */ | |
235 | /* but only if something really happened */ | |
236 | if (new_nwattr_changed || old_nwattr_changed) { | |
237 | res = ncp_ren_or_mov_file_or_subdir(NCP_SERVER(old_dir), | |
238 | old_dir, _old_name, | |
239 | new_dir, _new_name); | |
240 | } | |
241 | if (res) | |
242 | goto leave_me; | |
243 | /* file was successfully renamed, so: | |
244 | do not set attributes on old file - it no longer exists | |
245 | copy attributes from old file to new */ | |
246 | new_nwattr_changed = old_nwattr_changed; | |
247 | new_nwattr = old_nwattr; | |
248 | old_nwattr_changed = 0; | |
249 | ||
250 | leave_me:; | |
251 | if (old_nwattr_changed) { | |
252 | info.attributes = old_nwattr; | |
253 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(old_inode), old_inode, NULL, DM_ATTRIBUTES, &info); | |
254 | /* ignore errors */ | |
255 | } | |
256 | if (new_nwattr_changed) { | |
257 | info.attributes = new_nwattr; | |
258 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(new_dir), new_dir, _new_name, DM_ATTRIBUTES, &info); | |
259 | /* ignore errors */ | |
260 | } | |
261 | return(res); | |
262 | } | |
263 | #endif /* CONFIG_NCPFS_STRONG */ | |
264 | ||
265 | ||
266 | static int | |
267 | __ncp_lookup_validate(struct dentry * dentry, struct nameidata *nd) | |
268 | { | |
269 | struct ncp_server *server; | |
270 | struct dentry *parent; | |
271 | struct inode *dir; | |
272 | struct ncp_entry_info finfo; | |
273 | int res, val = 0, len; | |
274 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
275 | ||
276 | parent = dget_parent(dentry); | |
277 | dir = parent->d_inode; | |
278 | ||
279 | if (!dentry->d_inode) | |
280 | goto finished; | |
281 | ||
282 | server = NCP_SERVER(dir); | |
283 | ||
284 | if (!ncp_conn_valid(server)) | |
285 | goto finished; | |
286 | ||
287 | /* | |
288 | * Inspired by smbfs: | |
289 | * The default validation is based on dentry age: | |
290 | * We set the max age at mount time. (But each | |
291 | * successful server lookup renews the timestamp.) | |
292 | */ | |
293 | val = NCP_TEST_AGE(server, dentry); | |
294 | if (val) | |
295 | goto finished; | |
296 | ||
297 | DDPRINTK("ncp_lookup_validate: %s/%s not valid, age=%ld, server lookup\n", | |
298 | dentry->d_parent->d_name.name, dentry->d_name.name, | |
299 | NCP_GET_AGE(dentry)); | |
300 | ||
301 | len = sizeof(__name); | |
302 | if (ncp_is_server_root(dir)) { | |
303 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
304 | dentry->d_name.len, 1); | |
305 | if (!res) | |
306 | res = ncp_lookup_volume(server, __name, &(finfo.i)); | |
307 | } else { | |
308 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
309 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
310 | if (!res) | |
311 | res = ncp_obtain_info(server, dir, __name, &(finfo.i)); | |
312 | } | |
313 | finfo.volume = finfo.i.volNumber; | |
314 | DDPRINTK("ncp_lookup_validate: looked for %s/%s, res=%d\n", | |
315 | dentry->d_parent->d_name.name, __name, res); | |
316 | /* | |
317 | * If we didn't find it, or if it has a different dirEntNum to | |
318 | * what we remember, it's not valid any more. | |
319 | */ | |
320 | if (!res) { | |
321 | if (finfo.i.dirEntNum == NCP_FINFO(dentry->d_inode)->dirEntNum) { | |
322 | ncp_new_dentry(dentry); | |
323 | val=1; | |
324 | } else | |
325 | DDPRINTK("ncp_lookup_validate: found, but dirEntNum changed\n"); | |
326 | ||
327 | ncp_update_inode2(dentry->d_inode, &finfo); | |
328 | } | |
329 | ||
330 | finished: | |
331 | DDPRINTK("ncp_lookup_validate: result=%d\n", val); | |
332 | dput(parent); | |
333 | return val; | |
334 | } | |
335 | ||
336 | static int | |
337 | ncp_lookup_validate(struct dentry * dentry, struct nameidata *nd) | |
338 | { | |
339 | int res; | |
340 | lock_kernel(); | |
341 | res = __ncp_lookup_validate(dentry, nd); | |
342 | unlock_kernel(); | |
343 | return res; | |
344 | } | |
345 | ||
346 | static struct dentry * | |
347 | ncp_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos) | |
348 | { | |
349 | struct dentry *dent = dentry; | |
350 | struct list_head *next; | |
351 | ||
352 | if (d_validate(dent, parent)) { | |
353 | if (dent->d_name.len <= NCP_MAXPATHLEN && | |
354 | (unsigned long)dent->d_fsdata == fpos) { | |
355 | if (!dent->d_inode) { | |
356 | dput(dent); | |
357 | dent = NULL; | |
358 | } | |
359 | return dent; | |
360 | } | |
361 | dput(dent); | |
362 | } | |
363 | ||
364 | /* If a pointer is invalid, we search the dentry. */ | |
365 | spin_lock(&dcache_lock); | |
366 | next = parent->d_subdirs.next; | |
367 | while (next != &parent->d_subdirs) { | |
5160ee6f | 368 | dent = list_entry(next, struct dentry, d_u.d_child); |
1da177e4 LT |
369 | if ((unsigned long)dent->d_fsdata == fpos) { |
370 | if (dent->d_inode) | |
371 | dget_locked(dent); | |
372 | else | |
373 | dent = NULL; | |
374 | spin_unlock(&dcache_lock); | |
375 | goto out; | |
376 | } | |
377 | next = next->next; | |
378 | } | |
379 | spin_unlock(&dcache_lock); | |
380 | return NULL; | |
381 | ||
382 | out: | |
383 | return dent; | |
384 | } | |
385 | ||
386 | static time_t ncp_obtain_mtime(struct dentry *dentry) | |
387 | { | |
388 | struct inode *inode = dentry->d_inode; | |
389 | struct ncp_server *server = NCP_SERVER(inode); | |
390 | struct nw_info_struct i; | |
391 | ||
392 | if (!ncp_conn_valid(server) || ncp_is_server_root(inode)) | |
393 | return 0; | |
394 | ||
395 | if (ncp_obtain_info(server, inode, NULL, &i)) | |
396 | return 0; | |
397 | ||
398 | return ncp_date_dos2unix(i.modifyTime, i.modifyDate); | |
399 | } | |
400 | ||
401 | static int ncp_readdir(struct file *filp, void *dirent, filldir_t filldir) | |
402 | { | |
403 | struct dentry *dentry = filp->f_dentry; | |
404 | struct inode *inode = dentry->d_inode; | |
405 | struct page *page = NULL; | |
406 | struct ncp_server *server = NCP_SERVER(inode); | |
407 | union ncp_dir_cache *cache = NULL; | |
408 | struct ncp_cache_control ctl; | |
409 | int result, mtime_valid = 0; | |
410 | time_t mtime = 0; | |
411 | ||
412 | lock_kernel(); | |
413 | ||
414 | ctl.page = NULL; | |
415 | ctl.cache = NULL; | |
416 | ||
417 | DDPRINTK("ncp_readdir: reading %s/%s, pos=%d\n", | |
418 | dentry->d_parent->d_name.name, dentry->d_name.name, | |
419 | (int) filp->f_pos); | |
420 | ||
421 | result = -EIO; | |
422 | if (!ncp_conn_valid(server)) | |
423 | goto out; | |
424 | ||
425 | result = 0; | |
426 | if (filp->f_pos == 0) { | |
427 | if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR)) | |
428 | goto out; | |
429 | filp->f_pos = 1; | |
430 | } | |
431 | if (filp->f_pos == 1) { | |
432 | if (filldir(dirent, "..", 2, 1, parent_ino(dentry), DT_DIR)) | |
433 | goto out; | |
434 | filp->f_pos = 2; | |
435 | } | |
436 | ||
437 | page = grab_cache_page(&inode->i_data, 0); | |
438 | if (!page) | |
439 | goto read_really; | |
440 | ||
441 | ctl.cache = cache = kmap(page); | |
442 | ctl.head = cache->head; | |
443 | ||
444 | if (!PageUptodate(page) || !ctl.head.eof) | |
445 | goto init_cache; | |
446 | ||
447 | if (filp->f_pos == 2) { | |
448 | if (jiffies - ctl.head.time >= NCP_MAX_AGE(server)) | |
449 | goto init_cache; | |
450 | ||
451 | mtime = ncp_obtain_mtime(dentry); | |
452 | mtime_valid = 1; | |
453 | if ((!mtime) || (mtime != ctl.head.mtime)) | |
454 | goto init_cache; | |
455 | } | |
456 | ||
457 | if (filp->f_pos > ctl.head.end) | |
458 | goto finished; | |
459 | ||
460 | ctl.fpos = filp->f_pos + (NCP_DIRCACHE_START - 2); | |
461 | ctl.ofs = ctl.fpos / NCP_DIRCACHE_SIZE; | |
462 | ctl.idx = ctl.fpos % NCP_DIRCACHE_SIZE; | |
463 | ||
464 | for (;;) { | |
465 | if (ctl.ofs != 0) { | |
466 | ctl.page = find_lock_page(&inode->i_data, ctl.ofs); | |
467 | if (!ctl.page) | |
468 | goto invalid_cache; | |
469 | ctl.cache = kmap(ctl.page); | |
470 | if (!PageUptodate(ctl.page)) | |
471 | goto invalid_cache; | |
472 | } | |
473 | while (ctl.idx < NCP_DIRCACHE_SIZE) { | |
474 | struct dentry *dent; | |
475 | int res; | |
476 | ||
477 | dent = ncp_dget_fpos(ctl.cache->dentry[ctl.idx], | |
478 | dentry, filp->f_pos); | |
479 | if (!dent) | |
480 | goto invalid_cache; | |
481 | res = filldir(dirent, dent->d_name.name, | |
482 | dent->d_name.len, filp->f_pos, | |
483 | dent->d_inode->i_ino, DT_UNKNOWN); | |
484 | dput(dent); | |
485 | if (res) | |
486 | goto finished; | |
487 | filp->f_pos += 1; | |
488 | ctl.idx += 1; | |
489 | if (filp->f_pos > ctl.head.end) | |
490 | goto finished; | |
491 | } | |
492 | if (ctl.page) { | |
493 | kunmap(ctl.page); | |
494 | SetPageUptodate(ctl.page); | |
495 | unlock_page(ctl.page); | |
496 | page_cache_release(ctl.page); | |
497 | ctl.page = NULL; | |
498 | } | |
499 | ctl.idx = 0; | |
500 | ctl.ofs += 1; | |
501 | } | |
502 | invalid_cache: | |
503 | if (ctl.page) { | |
504 | kunmap(ctl.page); | |
505 | unlock_page(ctl.page); | |
506 | page_cache_release(ctl.page); | |
507 | ctl.page = NULL; | |
508 | } | |
509 | ctl.cache = cache; | |
510 | init_cache: | |
511 | ncp_invalidate_dircache_entries(dentry); | |
512 | if (!mtime_valid) { | |
513 | mtime = ncp_obtain_mtime(dentry); | |
514 | mtime_valid = 1; | |
515 | } | |
516 | ctl.head.mtime = mtime; | |
517 | ctl.head.time = jiffies; | |
518 | ctl.head.eof = 0; | |
519 | ctl.fpos = 2; | |
520 | ctl.ofs = 0; | |
521 | ctl.idx = NCP_DIRCACHE_START; | |
522 | ctl.filled = 0; | |
523 | ctl.valid = 1; | |
524 | read_really: | |
525 | if (ncp_is_server_root(inode)) { | |
526 | ncp_read_volume_list(filp, dirent, filldir, &ctl); | |
527 | } else { | |
528 | ncp_do_readdir(filp, dirent, filldir, &ctl); | |
529 | } | |
530 | ctl.head.end = ctl.fpos - 1; | |
531 | ctl.head.eof = ctl.valid; | |
532 | finished: | |
533 | if (page) { | |
534 | cache->head = ctl.head; | |
535 | kunmap(page); | |
536 | SetPageUptodate(page); | |
537 | unlock_page(page); | |
538 | page_cache_release(page); | |
539 | } | |
540 | if (ctl.page) { | |
541 | kunmap(ctl.page); | |
542 | SetPageUptodate(ctl.page); | |
543 | unlock_page(ctl.page); | |
544 | page_cache_release(ctl.page); | |
545 | } | |
546 | out: | |
547 | unlock_kernel(); | |
548 | return result; | |
549 | } | |
550 | ||
551 | static int | |
552 | ncp_fill_cache(struct file *filp, void *dirent, filldir_t filldir, | |
553 | struct ncp_cache_control *ctrl, struct ncp_entry_info *entry) | |
554 | { | |
555 | struct dentry *newdent, *dentry = filp->f_dentry; | |
556 | struct inode *newino, *inode = dentry->d_inode; | |
557 | struct ncp_cache_control ctl = *ctrl; | |
558 | struct qstr qname; | |
559 | int valid = 0; | |
560 | int hashed = 0; | |
561 | ino_t ino = 0; | |
562 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
563 | ||
564 | qname.len = sizeof(__name); | |
565 | if (ncp_vol2io(NCP_SERVER(inode), __name, &qname.len, | |
566 | entry->i.entryName, entry->i.nameLen, | |
567 | !ncp_preserve_entry_case(inode, entry->i.NSCreator))) | |
568 | return 1; /* I'm not sure */ | |
569 | ||
570 | qname.name = __name; | |
571 | qname.hash = full_name_hash(qname.name, qname.len); | |
572 | ||
573 | if (dentry->d_op && dentry->d_op->d_hash) | |
574 | if (dentry->d_op->d_hash(dentry, &qname) != 0) | |
575 | goto end_advance; | |
576 | ||
577 | newdent = d_lookup(dentry, &qname); | |
578 | ||
579 | if (!newdent) { | |
580 | newdent = d_alloc(dentry, &qname); | |
581 | if (!newdent) | |
582 | goto end_advance; | |
583 | } else { | |
584 | hashed = 1; | |
585 | memcpy((char *) newdent->d_name.name, qname.name, | |
586 | newdent->d_name.len); | |
587 | } | |
588 | ||
589 | if (!newdent->d_inode) { | |
590 | entry->opened = 0; | |
591 | entry->ino = iunique(inode->i_sb, 2); | |
592 | newino = ncp_iget(inode->i_sb, entry); | |
593 | if (newino) { | |
594 | newdent->d_op = &ncp_dentry_operations; | |
595 | d_instantiate(newdent, newino); | |
596 | if (!hashed) | |
597 | d_rehash(newdent); | |
598 | } | |
599 | } else | |
600 | ncp_update_inode2(newdent->d_inode, entry); | |
601 | ||
602 | if (newdent->d_inode) { | |
603 | ino = newdent->d_inode->i_ino; | |
604 | newdent->d_fsdata = (void *) ctl.fpos; | |
605 | ncp_new_dentry(newdent); | |
606 | } | |
607 | ||
608 | if (ctl.idx >= NCP_DIRCACHE_SIZE) { | |
609 | if (ctl.page) { | |
610 | kunmap(ctl.page); | |
611 | SetPageUptodate(ctl.page); | |
612 | unlock_page(ctl.page); | |
613 | page_cache_release(ctl.page); | |
614 | } | |
615 | ctl.cache = NULL; | |
616 | ctl.idx -= NCP_DIRCACHE_SIZE; | |
617 | ctl.ofs += 1; | |
618 | ctl.page = grab_cache_page(&inode->i_data, ctl.ofs); | |
619 | if (ctl.page) | |
620 | ctl.cache = kmap(ctl.page); | |
621 | } | |
622 | if (ctl.cache) { | |
623 | ctl.cache->dentry[ctl.idx] = newdent; | |
624 | valid = 1; | |
625 | } | |
626 | dput(newdent); | |
627 | end_advance: | |
628 | if (!valid) | |
629 | ctl.valid = 0; | |
630 | if (!ctl.filled && (ctl.fpos == filp->f_pos)) { | |
631 | if (!ino) | |
632 | ino = find_inode_number(dentry, &qname); | |
633 | if (!ino) | |
634 | ino = iunique(inode->i_sb, 2); | |
635 | ctl.filled = filldir(dirent, qname.name, qname.len, | |
636 | filp->f_pos, ino, DT_UNKNOWN); | |
637 | if (!ctl.filled) | |
638 | filp->f_pos += 1; | |
639 | } | |
640 | ctl.fpos += 1; | |
641 | ctl.idx += 1; | |
642 | *ctrl = ctl; | |
643 | return (ctl.valid || !ctl.filled); | |
644 | } | |
645 | ||
646 | static void | |
647 | ncp_read_volume_list(struct file *filp, void *dirent, filldir_t filldir, | |
648 | struct ncp_cache_control *ctl) | |
649 | { | |
650 | struct dentry *dentry = filp->f_dentry; | |
651 | struct inode *inode = dentry->d_inode; | |
652 | struct ncp_server *server = NCP_SERVER(inode); | |
653 | struct ncp_volume_info info; | |
654 | struct ncp_entry_info entry; | |
655 | int i; | |
656 | ||
657 | DPRINTK("ncp_read_volume_list: pos=%ld\n", | |
658 | (unsigned long) filp->f_pos); | |
659 | ||
660 | for (i = 0; i < NCP_NUMBER_OF_VOLUMES; i++) { | |
661 | ||
662 | if (ncp_get_volume_info_with_number(server, i, &info) != 0) | |
663 | return; | |
664 | if (!strlen(info.volume_name)) | |
665 | continue; | |
666 | ||
667 | DPRINTK("ncp_read_volume_list: found vol: %s\n", | |
668 | info.volume_name); | |
669 | ||
670 | if (ncp_lookup_volume(server, info.volume_name, | |
671 | &entry.i)) { | |
672 | DPRINTK("ncpfs: could not lookup vol %s\n", | |
673 | info.volume_name); | |
674 | continue; | |
675 | } | |
676 | entry.volume = entry.i.volNumber; | |
677 | if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry)) | |
678 | return; | |
679 | } | |
680 | } | |
681 | ||
682 | static void | |
683 | ncp_do_readdir(struct file *filp, void *dirent, filldir_t filldir, | |
684 | struct ncp_cache_control *ctl) | |
685 | { | |
686 | struct dentry *dentry = filp->f_dentry; | |
687 | struct inode *dir = dentry->d_inode; | |
688 | struct ncp_server *server = NCP_SERVER(dir); | |
689 | struct nw_search_sequence seq; | |
690 | struct ncp_entry_info entry; | |
691 | int err; | |
692 | void* buf; | |
693 | int more; | |
694 | size_t bufsize; | |
695 | ||
696 | DPRINTK("ncp_do_readdir: %s/%s, fpos=%ld\n", | |
697 | dentry->d_parent->d_name.name, dentry->d_name.name, | |
698 | (unsigned long) filp->f_pos); | |
699 | PPRINTK("ncp_do_readdir: init %s, volnum=%d, dirent=%u\n", | |
700 | dentry->d_name.name, NCP_FINFO(dir)->volNumber, | |
701 | NCP_FINFO(dir)->dirEntNum); | |
702 | ||
703 | err = ncp_initialize_search(server, dir, &seq); | |
704 | if (err) { | |
705 | DPRINTK("ncp_do_readdir: init failed, err=%d\n", err); | |
706 | return; | |
707 | } | |
1da177e4 LT |
708 | /* We MUST NOT use server->buffer_size handshaked with server if we are |
709 | using UDP, as for UDP server uses max. buffer size determined by | |
710 | MTU, and for TCP server uses hardwired value 65KB (== 66560 bytes). | |
711 | So we use 128KB, just to be sure, as there is no way how to know | |
712 | this value in advance. */ | |
713 | bufsize = 131072; | |
714 | buf = vmalloc(bufsize); | |
715 | if (!buf) | |
716 | return; | |
717 | do { | |
718 | int cnt; | |
719 | char* rpl; | |
720 | size_t rpls; | |
721 | ||
722 | err = ncp_search_for_fileset(server, &seq, &more, &cnt, buf, bufsize, &rpl, &rpls); | |
723 | if (err) /* Error */ | |
724 | break; | |
725 | if (!cnt) /* prevent endless loop */ | |
726 | break; | |
727 | while (cnt--) { | |
728 | size_t onerpl; | |
729 | ||
730 | if (rpls < offsetof(struct nw_info_struct, entryName)) | |
731 | break; /* short packet */ | |
732 | ncp_extract_file_info(rpl, &entry.i); | |
733 | onerpl = offsetof(struct nw_info_struct, entryName) + entry.i.nameLen; | |
734 | if (rpls < onerpl) | |
735 | break; /* short packet */ | |
736 | (void)ncp_obtain_nfs_info(server, &entry.i); | |
737 | rpl += onerpl; | |
738 | rpls -= onerpl; | |
739 | entry.volume = entry.i.volNumber; | |
740 | if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry)) | |
741 | break; | |
742 | } | |
743 | } while (more); | |
744 | vfree(buf); | |
1da177e4 LT |
745 | return; |
746 | } | |
747 | ||
748 | int ncp_conn_logged_in(struct super_block *sb) | |
749 | { | |
750 | struct ncp_server* server = NCP_SBP(sb); | |
751 | int result; | |
752 | ||
753 | if (ncp_single_volume(server)) { | |
754 | int len; | |
755 | struct dentry* dent; | |
756 | __u32 volNumber; | |
757 | __le32 dirEntNum; | |
758 | __le32 DosDirNum; | |
759 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
760 | ||
761 | len = sizeof(__name); | |
762 | result = ncp_io2vol(server, __name, &len, server->m.mounted_vol, | |
763 | strlen(server->m.mounted_vol), 1); | |
764 | if (result) | |
765 | goto out; | |
766 | result = -ENOENT; | |
767 | if (ncp_get_volume_root(server, __name, &volNumber, &dirEntNum, &DosDirNum)) { | |
768 | PPRINTK("ncp_conn_logged_in: %s not found\n", | |
769 | server->m.mounted_vol); | |
770 | goto out; | |
771 | } | |
772 | dent = sb->s_root; | |
773 | if (dent) { | |
774 | struct inode* ino = dent->d_inode; | |
775 | if (ino) { | |
776 | NCP_FINFO(ino)->volNumber = volNumber; | |
777 | NCP_FINFO(ino)->dirEntNum = dirEntNum; | |
778 | NCP_FINFO(ino)->DosDirNum = DosDirNum; | |
779 | } else { | |
780 | DPRINTK("ncpfs: sb->s_root->d_inode == NULL!\n"); | |
781 | } | |
782 | } else { | |
783 | DPRINTK("ncpfs: sb->s_root == NULL!\n"); | |
784 | } | |
785 | } | |
786 | result = 0; | |
787 | ||
788 | out: | |
789 | return result; | |
790 | } | |
791 | ||
792 | static struct dentry *ncp_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) | |
793 | { | |
794 | struct ncp_server *server = NCP_SERVER(dir); | |
795 | struct inode *inode = NULL; | |
796 | struct ncp_entry_info finfo; | |
797 | int error, res, len; | |
798 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
799 | ||
800 | lock_kernel(); | |
801 | error = -EIO; | |
802 | if (!ncp_conn_valid(server)) | |
803 | goto finished; | |
804 | ||
805 | PPRINTK("ncp_lookup: server lookup for %s/%s\n", | |
806 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
807 | ||
808 | len = sizeof(__name); | |
809 | if (ncp_is_server_root(dir)) { | |
810 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
811 | dentry->d_name.len, 1); | |
812 | if (!res) | |
813 | res = ncp_lookup_volume(server, __name, &(finfo.i)); | |
814 | } else { | |
815 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
816 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
817 | if (!res) | |
818 | res = ncp_obtain_info(server, dir, __name, &(finfo.i)); | |
819 | } | |
820 | PPRINTK("ncp_lookup: looked for %s/%s, res=%d\n", | |
821 | dentry->d_parent->d_name.name, __name, res); | |
822 | /* | |
823 | * If we didn't find an entry, make a negative dentry. | |
824 | */ | |
825 | if (res) | |
826 | goto add_entry; | |
827 | ||
828 | /* | |
829 | * Create an inode for the entry. | |
830 | */ | |
831 | finfo.opened = 0; | |
832 | finfo.ino = iunique(dir->i_sb, 2); | |
833 | finfo.volume = finfo.i.volNumber; | |
834 | error = -EACCES; | |
835 | inode = ncp_iget(dir->i_sb, &finfo); | |
836 | ||
837 | if (inode) { | |
838 | ncp_new_dentry(dentry); | |
839 | add_entry: | |
840 | dentry->d_op = &ncp_dentry_operations; | |
841 | d_add(dentry, inode); | |
842 | error = 0; | |
843 | } | |
844 | ||
845 | finished: | |
846 | PPRINTK("ncp_lookup: result=%d\n", error); | |
847 | unlock_kernel(); | |
848 | return ERR_PTR(error); | |
849 | } | |
850 | ||
851 | /* | |
852 | * This code is common to create, mkdir, and mknod. | |
853 | */ | |
854 | static int ncp_instantiate(struct inode *dir, struct dentry *dentry, | |
855 | struct ncp_entry_info *finfo) | |
856 | { | |
857 | struct inode *inode; | |
858 | int error = -EINVAL; | |
859 | ||
860 | finfo->ino = iunique(dir->i_sb, 2); | |
861 | inode = ncp_iget(dir->i_sb, finfo); | |
862 | if (!inode) | |
863 | goto out_close; | |
864 | d_instantiate(dentry,inode); | |
865 | error = 0; | |
866 | out: | |
867 | return error; | |
868 | ||
869 | out_close: | |
870 | PPRINTK("ncp_instantiate: %s/%s failed, closing file\n", | |
871 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
872 | ncp_close_file(NCP_SERVER(dir), finfo->file_handle); | |
873 | goto out; | |
874 | } | |
875 | ||
876 | int ncp_create_new(struct inode *dir, struct dentry *dentry, int mode, | |
877 | dev_t rdev, __le32 attributes) | |
878 | { | |
879 | struct ncp_server *server = NCP_SERVER(dir); | |
880 | struct ncp_entry_info finfo; | |
881 | int error, result, len; | |
882 | int opmode; | |
883 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
884 | ||
885 | PPRINTK("ncp_create_new: creating %s/%s, mode=%x\n", | |
886 | dentry->d_parent->d_name.name, dentry->d_name.name, mode); | |
887 | ||
888 | error = -EIO; | |
889 | lock_kernel(); | |
890 | if (!ncp_conn_valid(server)) | |
891 | goto out; | |
892 | ||
893 | ncp_age_dentry(server, dentry); | |
894 | len = sizeof(__name); | |
895 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
896 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
897 | if (error) | |
898 | goto out; | |
899 | ||
900 | error = -EACCES; | |
901 | ||
902 | if (S_ISREG(mode) && | |
903 | (server->m.flags & NCP_MOUNT_EXTRAS) && | |
904 | (mode & S_IXUGO)) | |
905 | attributes |= aSYSTEM | aSHARED; | |
906 | ||
907 | result = ncp_open_create_file_or_subdir(server, dir, __name, | |
908 | OC_MODE_CREATE | OC_MODE_OPEN | OC_MODE_REPLACE, | |
909 | attributes, AR_READ | AR_WRITE, &finfo); | |
910 | opmode = O_RDWR; | |
911 | if (result) { | |
912 | result = ncp_open_create_file_or_subdir(server, dir, __name, | |
913 | OC_MODE_CREATE | OC_MODE_OPEN | OC_MODE_REPLACE, | |
914 | attributes, AR_WRITE, &finfo); | |
915 | if (result) { | |
916 | if (result == 0x87) | |
917 | error = -ENAMETOOLONG; | |
918 | DPRINTK("ncp_create: %s/%s failed\n", | |
919 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
920 | goto out; | |
921 | } | |
922 | opmode = O_WRONLY; | |
923 | } | |
924 | finfo.access = opmode; | |
925 | if (ncp_is_nfs_extras(server, finfo.volume)) { | |
926 | finfo.i.nfs.mode = mode; | |
927 | finfo.i.nfs.rdev = new_encode_dev(rdev); | |
928 | if (ncp_modify_nfs_info(server, finfo.volume, | |
929 | finfo.i.dirEntNum, | |
930 | mode, new_encode_dev(rdev)) != 0) | |
931 | goto out; | |
932 | } | |
933 | ||
934 | error = ncp_instantiate(dir, dentry, &finfo); | |
935 | out: | |
936 | unlock_kernel(); | |
937 | return error; | |
938 | } | |
939 | ||
940 | static int ncp_create(struct inode *dir, struct dentry *dentry, int mode, | |
941 | struct nameidata *nd) | |
942 | { | |
943 | return ncp_create_new(dir, dentry, mode, 0, 0); | |
944 | } | |
945 | ||
946 | static int ncp_mkdir(struct inode *dir, struct dentry *dentry, int mode) | |
947 | { | |
948 | struct ncp_entry_info finfo; | |
949 | struct ncp_server *server = NCP_SERVER(dir); | |
950 | int error, len; | |
951 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
952 | ||
953 | DPRINTK("ncp_mkdir: making %s/%s\n", | |
954 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
955 | ||
956 | error = -EIO; | |
957 | lock_kernel(); | |
958 | if (!ncp_conn_valid(server)) | |
959 | goto out; | |
960 | ||
961 | ncp_age_dentry(server, dentry); | |
962 | len = sizeof(__name); | |
963 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
964 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
965 | if (error) | |
966 | goto out; | |
967 | ||
968 | error = -EACCES; | |
969 | if (ncp_open_create_file_or_subdir(server, dir, __name, | |
970 | OC_MODE_CREATE, aDIR, | |
971 | cpu_to_le16(0xffff), | |
972 | &finfo) == 0) | |
973 | { | |
974 | if (ncp_is_nfs_extras(server, finfo.volume)) { | |
975 | mode |= S_IFDIR; | |
976 | finfo.i.nfs.mode = mode; | |
977 | if (ncp_modify_nfs_info(server, | |
978 | finfo.volume, | |
979 | finfo.i.dirEntNum, | |
980 | mode, 0) != 0) | |
981 | goto out; | |
982 | } | |
983 | error = ncp_instantiate(dir, dentry, &finfo); | |
984 | } | |
985 | out: | |
986 | unlock_kernel(); | |
987 | return error; | |
988 | } | |
989 | ||
990 | static int ncp_rmdir(struct inode *dir, struct dentry *dentry) | |
991 | { | |
992 | struct ncp_server *server = NCP_SERVER(dir); | |
993 | int error, result, len; | |
994 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
995 | ||
996 | DPRINTK("ncp_rmdir: removing %s/%s\n", | |
997 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
998 | ||
999 | error = -EIO; | |
1000 | lock_kernel(); | |
1001 | if (!ncp_conn_valid(server)) | |
1002 | goto out; | |
1003 | ||
1004 | error = -EBUSY; | |
1005 | if (!d_unhashed(dentry)) | |
1006 | goto out; | |
1007 | ||
1008 | len = sizeof(__name); | |
1009 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
1010 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
1011 | if (error) | |
1012 | goto out; | |
1013 | ||
1014 | result = ncp_del_file_or_subdir(server, dir, __name); | |
1015 | switch (result) { | |
1016 | case 0x00: | |
1017 | error = 0; | |
1018 | break; | |
1019 | case 0x85: /* unauthorized to delete file */ | |
1020 | case 0x8A: /* unauthorized to delete file */ | |
1021 | error = -EACCES; | |
1022 | break; | |
1023 | case 0x8F: | |
1024 | case 0x90: /* read only */ | |
1025 | error = -EPERM; | |
1026 | break; | |
1027 | case 0x9F: /* in use by another client */ | |
1028 | error = -EBUSY; | |
1029 | break; | |
1030 | case 0xA0: /* directory not empty */ | |
1031 | error = -ENOTEMPTY; | |
1032 | break; | |
1033 | case 0xFF: /* someone deleted file */ | |
1034 | error = -ENOENT; | |
1035 | break; | |
1036 | default: | |
1037 | error = -EACCES; | |
1038 | break; | |
1039 | } | |
1040 | out: | |
1041 | unlock_kernel(); | |
1042 | return error; | |
1043 | } | |
1044 | ||
1045 | static int ncp_unlink(struct inode *dir, struct dentry *dentry) | |
1046 | { | |
1047 | struct inode *inode = dentry->d_inode; | |
1048 | struct ncp_server *server; | |
1049 | int error; | |
1050 | ||
1051 | lock_kernel(); | |
1052 | server = NCP_SERVER(dir); | |
1053 | DPRINTK("ncp_unlink: unlinking %s/%s\n", | |
1054 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
1055 | ||
1056 | error = -EIO; | |
1057 | if (!ncp_conn_valid(server)) | |
1058 | goto out; | |
1059 | ||
1060 | /* | |
1061 | * Check whether to close the file ... | |
1062 | */ | |
1063 | if (inode) { | |
1064 | PPRINTK("ncp_unlink: closing file\n"); | |
1065 | ncp_make_closed(inode); | |
1066 | } | |
1067 | ||
1068 | error = ncp_del_file_or_subdir2(server, dentry); | |
1069 | #ifdef CONFIG_NCPFS_STRONG | |
1070 | /* 9C is Invalid path.. It should be 8F, 90 - read only, but | |
1071 | it is not :-( */ | |
1072 | if ((error == 0x9C || error == 0x90) && server->m.flags & NCP_MOUNT_STRONG) { /* R/O */ | |
1073 | error = ncp_force_unlink(dir, dentry); | |
1074 | } | |
1075 | #endif | |
1076 | switch (error) { | |
1077 | case 0x00: | |
1078 | DPRINTK("ncp: removed %s/%s\n", | |
1079 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
1080 | break; | |
1081 | case 0x85: | |
1082 | case 0x8A: | |
1083 | error = -EACCES; | |
1084 | break; | |
1085 | case 0x8D: /* some files in use */ | |
1086 | case 0x8E: /* all files in use */ | |
1087 | error = -EBUSY; | |
1088 | break; | |
1089 | case 0x8F: /* some read only */ | |
1090 | case 0x90: /* all read only */ | |
1091 | case 0x9C: /* !!! returned when in-use or read-only by NW4 */ | |
1092 | error = -EPERM; | |
1093 | break; | |
1094 | case 0xFF: | |
1095 | error = -ENOENT; | |
1096 | break; | |
1097 | default: | |
1098 | error = -EACCES; | |
1099 | break; | |
1100 | } | |
1101 | ||
1102 | out: | |
1103 | unlock_kernel(); | |
1104 | return error; | |
1105 | } | |
1106 | ||
1107 | static int ncp_rename(struct inode *old_dir, struct dentry *old_dentry, | |
1108 | struct inode *new_dir, struct dentry *new_dentry) | |
1109 | { | |
1110 | struct ncp_server *server = NCP_SERVER(old_dir); | |
1111 | int error; | |
1112 | int old_len, new_len; | |
1113 | __u8 __old_name[NCP_MAXPATHLEN + 1], __new_name[NCP_MAXPATHLEN + 1]; | |
1114 | ||
1115 | DPRINTK("ncp_rename: %s/%s to %s/%s\n", | |
1116 | old_dentry->d_parent->d_name.name, old_dentry->d_name.name, | |
1117 | new_dentry->d_parent->d_name.name, new_dentry->d_name.name); | |
1118 | ||
1119 | error = -EIO; | |
1120 | lock_kernel(); | |
1121 | if (!ncp_conn_valid(server)) | |
1122 | goto out; | |
1123 | ||
1124 | ncp_age_dentry(server, old_dentry); | |
1125 | ncp_age_dentry(server, new_dentry); | |
1126 | ||
1127 | old_len = sizeof(__old_name); | |
1128 | error = ncp_io2vol(server, __old_name, &old_len, | |
1129 | old_dentry->d_name.name, old_dentry->d_name.len, | |
1130 | !ncp_preserve_case(old_dir)); | |
1131 | if (error) | |
1132 | goto out; | |
1133 | ||
1134 | new_len = sizeof(__new_name); | |
1135 | error = ncp_io2vol(server, __new_name, &new_len, | |
1136 | new_dentry->d_name.name, new_dentry->d_name.len, | |
1137 | !ncp_preserve_case(new_dir)); | |
1138 | if (error) | |
1139 | goto out; | |
1140 | ||
1141 | error = ncp_ren_or_mov_file_or_subdir(server, old_dir, __old_name, | |
1142 | new_dir, __new_name); | |
1143 | #ifdef CONFIG_NCPFS_STRONG | |
1144 | if ((error == 0x90 || error == 0x8B || error == -EACCES) && | |
1145 | server->m.flags & NCP_MOUNT_STRONG) { /* RO */ | |
1146 | error = ncp_force_rename(old_dir, old_dentry, __old_name, | |
1147 | new_dir, new_dentry, __new_name); | |
1148 | } | |
1149 | #endif | |
1150 | switch (error) { | |
1151 | case 0x00: | |
1152 | DPRINTK("ncp renamed %s -> %s.\n", | |
1153 | old_dentry->d_name.name,new_dentry->d_name.name); | |
1154 | break; | |
1155 | case 0x9E: | |
1156 | error = -ENAMETOOLONG; | |
1157 | break; | |
1158 | case 0xFF: | |
1159 | error = -ENOENT; | |
1160 | break; | |
1161 | default: | |
1162 | error = -EACCES; | |
1163 | break; | |
1164 | } | |
1165 | out: | |
1166 | unlock_kernel(); | |
1167 | return error; | |
1168 | } | |
1169 | ||
1170 | static int ncp_mknod(struct inode * dir, struct dentry *dentry, | |
1171 | int mode, dev_t rdev) | |
1172 | { | |
1173 | if (!new_valid_dev(rdev)) | |
1174 | return -EINVAL; | |
1175 | if (ncp_is_nfs_extras(NCP_SERVER(dir), NCP_FINFO(dir)->volNumber)) { | |
1176 | DPRINTK(KERN_DEBUG "ncp_mknod: mode = 0%o\n", mode); | |
1177 | return ncp_create_new(dir, dentry, mode, rdev, 0); | |
1178 | } | |
1179 | return -EPERM; /* Strange, but true */ | |
1180 | } | |
1181 | ||
1182 | /* The following routines are taken directly from msdos-fs */ | |
1183 | ||
1184 | /* Linear day numbers of the respective 1sts in non-leap years. */ | |
1185 | ||
1186 | static int day_n[] = | |
1187 | {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, 0}; | |
1188 | /* Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec */ | |
1189 | ||
1190 | ||
1191 | extern struct timezone sys_tz; | |
1192 | ||
1193 | static int utc2local(int time) | |
1194 | { | |
1195 | return time - sys_tz.tz_minuteswest * 60; | |
1196 | } | |
1197 | ||
1198 | static int local2utc(int time) | |
1199 | { | |
1200 | return time + sys_tz.tz_minuteswest * 60; | |
1201 | } | |
1202 | ||
1203 | /* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */ | |
1204 | int | |
1205 | ncp_date_dos2unix(__le16 t, __le16 d) | |
1206 | { | |
1207 | unsigned short time = le16_to_cpu(t), date = le16_to_cpu(d); | |
1208 | int month, year, secs; | |
1209 | ||
1210 | /* first subtract and mask after that... Otherwise, if | |
1211 | date == 0, bad things happen */ | |
1212 | month = ((date >> 5) - 1) & 15; | |
1213 | year = date >> 9; | |
1214 | secs = (time & 31) * 2 + 60 * ((time >> 5) & 63) + (time >> 11) * 3600 + | |
1215 | 86400 * ((date & 31) - 1 + day_n[month] + (year / 4) + | |
1216 | year * 365 - ((year & 3) == 0 && month < 2 ? 1 : 0) + 3653); | |
1217 | /* days since 1.1.70 plus 80's leap day */ | |
1218 | return local2utc(secs); | |
1219 | } | |
1220 | ||
1221 | ||
1222 | /* Convert linear UNIX date to a MS-DOS time/date pair. */ | |
1223 | void | |
1224 | ncp_date_unix2dos(int unix_date, __le16 *time, __le16 *date) | |
1225 | { | |
1226 | int day, year, nl_day, month; | |
1227 | ||
1228 | unix_date = utc2local(unix_date); | |
1229 | *time = cpu_to_le16( | |
1230 | (unix_date % 60) / 2 + (((unix_date / 60) % 60) << 5) + | |
1231 | (((unix_date / 3600) % 24) << 11)); | |
1232 | day = unix_date / 86400 - 3652; | |
1233 | year = day / 365; | |
1234 | if ((year + 3) / 4 + 365 * year > day) | |
1235 | year--; | |
1236 | day -= (year + 3) / 4 + 365 * year; | |
1237 | if (day == 59 && !(year & 3)) { | |
1238 | nl_day = day; | |
1239 | month = 2; | |
1240 | } else { | |
1241 | nl_day = (year & 3) || day <= 59 ? day : day - 1; | |
1242 | for (month = 0; month < 12; month++) | |
1243 | if (day_n[month] > nl_day) | |
1244 | break; | |
1245 | } | |
1246 | *date = cpu_to_le16(nl_day - day_n[month - 1] + 1 + (month << 5) + (year << 9)); | |
1247 | } |