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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> | |
1da177e4 LT |
18 | #include <linux/vmalloc.h> |
19 | #include <linux/mm.h> | |
20 | #include <asm/uaccess.h> | |
21 | #include <asm/byteorder.h> | |
1da177e4 LT |
22 | |
23 | #include <linux/ncp_fs.h> | |
24 | ||
25 | #include "ncplib_kernel.h" | |
26 | ||
27 | static void ncp_read_volume_list(struct file *, void *, filldir_t, | |
28 | struct ncp_cache_control *); | |
29 | static void ncp_do_readdir(struct file *, void *, filldir_t, | |
30 | struct ncp_cache_control *); | |
31 | ||
32 | static int ncp_readdir(struct file *, void *, filldir_t); | |
33 | ||
34 | static int ncp_create(struct inode *, struct dentry *, int, struct nameidata *); | |
35 | static struct dentry *ncp_lookup(struct inode *, struct dentry *, struct nameidata *); | |
36 | static int ncp_unlink(struct inode *, struct dentry *); | |
37 | static int ncp_mkdir(struct inode *, struct dentry *, int); | |
38 | static int ncp_rmdir(struct inode *, struct dentry *); | |
39 | static int ncp_rename(struct inode *, struct dentry *, | |
40 | struct inode *, struct dentry *); | |
41 | static int ncp_mknod(struct inode * dir, struct dentry *dentry, | |
42 | int mode, dev_t rdev); | |
43 | #if defined(CONFIG_NCPFS_EXTRAS) || defined(CONFIG_NCPFS_NFS_NS) | |
44 | extern int ncp_symlink(struct inode *, struct dentry *, const char *); | |
45 | #else | |
46 | #define ncp_symlink NULL | |
47 | #endif | |
48 | ||
4b6f5d20 | 49 | const struct file_operations ncp_dir_operations = |
1da177e4 | 50 | { |
ca572727 | 51 | .llseek = generic_file_llseek, |
1da177e4 LT |
52 | .read = generic_read_dir, |
53 | .readdir = ncp_readdir, | |
93d84b6d | 54 | .unlocked_ioctl = ncp_ioctl, |
54f67f63 PV |
55 | #ifdef CONFIG_COMPAT |
56 | .compat_ioctl = ncp_compat_ioctl, | |
57 | #endif | |
1da177e4 LT |
58 | }; |
59 | ||
92e1d5be | 60 | const struct inode_operations ncp_dir_inode_operations = |
1da177e4 LT |
61 | { |
62 | .create = ncp_create, | |
63 | .lookup = ncp_lookup, | |
64 | .unlink = ncp_unlink, | |
65 | .symlink = ncp_symlink, | |
66 | .mkdir = ncp_mkdir, | |
67 | .rmdir = ncp_rmdir, | |
68 | .mknod = ncp_mknod, | |
69 | .rename = ncp_rename, | |
70 | .setattr = ncp_notify_change, | |
71 | }; | |
72 | ||
73 | /* | |
74 | * Dentry operations routines | |
75 | */ | |
76 | static int ncp_lookup_validate(struct dentry *, struct nameidata *); | |
77 | static int ncp_hash_dentry(struct dentry *, struct qstr *); | |
78 | static int ncp_compare_dentry (struct dentry *, struct qstr *, struct qstr *); | |
79 | static int ncp_delete_dentry(struct dentry *); | |
80 | ||
e16404ed | 81 | static const struct dentry_operations ncp_dentry_operations = |
1da177e4 LT |
82 | { |
83 | .d_revalidate = ncp_lookup_validate, | |
84 | .d_hash = ncp_hash_dentry, | |
85 | .d_compare = ncp_compare_dentry, | |
86 | .d_delete = ncp_delete_dentry, | |
87 | }; | |
88 | ||
e16404ed | 89 | const struct dentry_operations ncp_root_dentry_operations = |
1da177e4 LT |
90 | { |
91 | .d_hash = ncp_hash_dentry, | |
92 | .d_compare = ncp_compare_dentry, | |
93 | .d_delete = ncp_delete_dentry, | |
94 | }; | |
95 | ||
96 | ||
2e54eb96 PV |
97 | #define ncp_namespace(i) (NCP_SERVER(i)->name_space[NCP_FINFO(i)->volNumber]) |
98 | ||
99 | static inline int ncp_preserve_entry_case(struct inode *i, __u32 nscreator) | |
100 | { | |
101 | #ifdef CONFIG_NCPFS_SMALLDOS | |
102 | int ns = ncp_namespace(i); | |
103 | ||
104 | if ((ns == NW_NS_DOS) | |
105 | #ifdef CONFIG_NCPFS_OS2_NS | |
106 | || ((ns == NW_NS_OS2) && (nscreator == NW_NS_DOS)) | |
107 | #endif /* CONFIG_NCPFS_OS2_NS */ | |
108 | ) | |
109 | return 0; | |
110 | #endif /* CONFIG_NCPFS_SMALLDOS */ | |
111 | return 1; | |
112 | } | |
113 | ||
114 | #define ncp_preserve_case(i) (ncp_namespace(i) != NW_NS_DOS) | |
115 | ||
116 | static inline int ncp_case_sensitive(struct dentry *dentry) | |
117 | { | |
118 | #ifdef CONFIG_NCPFS_NFS_NS | |
119 | return ncp_namespace(dentry->d_inode) == NW_NS_NFS; | |
120 | #else | |
121 | return 0; | |
122 | #endif /* CONFIG_NCPFS_NFS_NS */ | |
123 | } | |
124 | ||
1da177e4 LT |
125 | /* |
126 | * Note: leave the hash unchanged if the directory | |
127 | * is case-sensitive. | |
128 | */ | |
129 | static int | |
130 | ncp_hash_dentry(struct dentry *dentry, struct qstr *this) | |
131 | { | |
2e54eb96 PV |
132 | if (!ncp_case_sensitive(dentry)) { |
133 | struct nls_table *t; | |
134 | unsigned long hash; | |
135 | int i; | |
1da177e4 | 136 | |
2e54eb96 | 137 | t = NCP_IO_TABLE(dentry); |
1da177e4 LT |
138 | hash = init_name_hash(); |
139 | for (i=0; i<this->len ; i++) | |
140 | hash = partial_name_hash(ncp_tolower(t, this->name[i]), | |
141 | hash); | |
142 | this->hash = end_name_hash(hash); | |
143 | } | |
144 | return 0; | |
145 | } | |
146 | ||
147 | static int | |
148 | ncp_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b) | |
149 | { | |
150 | if (a->len != b->len) | |
151 | return 1; | |
152 | ||
2e54eb96 | 153 | if (ncp_case_sensitive(dentry)) |
1da177e4 LT |
154 | return strncmp(a->name, b->name, a->len); |
155 | ||
156 | return ncp_strnicmp(NCP_IO_TABLE(dentry), a->name, b->name, a->len); | |
157 | } | |
158 | ||
159 | /* | |
160 | * This is the callback from dput() when d_count is going to 0. | |
161 | * We use this to unhash dentries with bad inodes. | |
162 | * Closing files can be safely postponed until iput() - it's done there anyway. | |
163 | */ | |
164 | static int | |
165 | ncp_delete_dentry(struct dentry * dentry) | |
166 | { | |
167 | struct inode *inode = dentry->d_inode; | |
168 | ||
169 | if (inode) { | |
170 | if (is_bad_inode(inode)) | |
171 | return 1; | |
172 | } else | |
173 | { | |
174 | /* N.B. Unhash negative dentries? */ | |
175 | } | |
176 | return 0; | |
177 | } | |
178 | ||
179 | static inline int | |
180 | ncp_single_volume(struct ncp_server *server) | |
181 | { | |
182 | return (server->m.mounted_vol[0] != '\0'); | |
183 | } | |
184 | ||
185 | static inline int ncp_is_server_root(struct inode *inode) | |
186 | { | |
187 | return (!ncp_single_volume(NCP_SERVER(inode)) && | |
188 | inode == inode->i_sb->s_root->d_inode); | |
189 | } | |
190 | ||
191 | ||
192 | /* | |
193 | * This is the callback when the dcache has a lookup hit. | |
194 | */ | |
195 | ||
196 | ||
197 | #ifdef CONFIG_NCPFS_STRONG | |
198 | /* try to delete a readonly file (NW R bit set) */ | |
199 | ||
200 | static int | |
201 | ncp_force_unlink(struct inode *dir, struct dentry* dentry) | |
202 | { | |
203 | int res=0x9c,res2; | |
204 | struct nw_modify_dos_info info; | |
205 | __le32 old_nwattr; | |
206 | struct inode *inode; | |
207 | ||
208 | memset(&info, 0, sizeof(info)); | |
209 | ||
210 | /* remove the Read-Only flag on the NW server */ | |
211 | inode = dentry->d_inode; | |
212 | ||
213 | old_nwattr = NCP_FINFO(inode)->nwattr; | |
214 | info.attributes = old_nwattr & ~(aRONLY|aDELETEINHIBIT|aRENAMEINHIBIT); | |
215 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(inode), inode, NULL, DM_ATTRIBUTES, &info); | |
216 | if (res2) | |
217 | goto leave_me; | |
218 | ||
219 | /* now try again the delete operation */ | |
220 | res = ncp_del_file_or_subdir2(NCP_SERVER(dir), dentry); | |
221 | ||
222 | if (res) /* delete failed, set R bit again */ | |
223 | { | |
224 | info.attributes = old_nwattr; | |
225 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(inode), inode, NULL, DM_ATTRIBUTES, &info); | |
226 | if (res2) | |
227 | goto leave_me; | |
228 | } | |
229 | leave_me: | |
230 | return(res); | |
231 | } | |
232 | #endif /* CONFIG_NCPFS_STRONG */ | |
233 | ||
234 | #ifdef CONFIG_NCPFS_STRONG | |
235 | static int | |
236 | ncp_force_rename(struct inode *old_dir, struct dentry* old_dentry, char *_old_name, | |
237 | struct inode *new_dir, struct dentry* new_dentry, char *_new_name) | |
238 | { | |
239 | struct nw_modify_dos_info info; | |
240 | int res=0x90,res2; | |
241 | struct inode *old_inode = old_dentry->d_inode; | |
242 | __le32 old_nwattr = NCP_FINFO(old_inode)->nwattr; | |
243 | __le32 new_nwattr = 0; /* shut compiler warning */ | |
244 | int old_nwattr_changed = 0; | |
245 | int new_nwattr_changed = 0; | |
246 | ||
247 | memset(&info, 0, sizeof(info)); | |
248 | ||
249 | /* remove the Read-Only flag on the NW server */ | |
250 | ||
251 | info.attributes = old_nwattr & ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT); | |
252 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(old_inode), old_inode, NULL, DM_ATTRIBUTES, &info); | |
253 | if (!res2) | |
254 | old_nwattr_changed = 1; | |
255 | if (new_dentry && new_dentry->d_inode) { | |
256 | new_nwattr = NCP_FINFO(new_dentry->d_inode)->nwattr; | |
257 | info.attributes = new_nwattr & ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT); | |
258 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(new_dir), new_dir, _new_name, DM_ATTRIBUTES, &info); | |
259 | if (!res2) | |
260 | new_nwattr_changed = 1; | |
261 | } | |
262 | /* now try again the rename operation */ | |
263 | /* but only if something really happened */ | |
264 | if (new_nwattr_changed || old_nwattr_changed) { | |
265 | res = ncp_ren_or_mov_file_or_subdir(NCP_SERVER(old_dir), | |
266 | old_dir, _old_name, | |
267 | new_dir, _new_name); | |
268 | } | |
269 | if (res) | |
270 | goto leave_me; | |
271 | /* file was successfully renamed, so: | |
272 | do not set attributes on old file - it no longer exists | |
273 | copy attributes from old file to new */ | |
274 | new_nwattr_changed = old_nwattr_changed; | |
275 | new_nwattr = old_nwattr; | |
276 | old_nwattr_changed = 0; | |
277 | ||
278 | leave_me:; | |
279 | if (old_nwattr_changed) { | |
280 | info.attributes = old_nwattr; | |
281 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(old_inode), old_inode, NULL, DM_ATTRIBUTES, &info); | |
282 | /* ignore errors */ | |
283 | } | |
284 | if (new_nwattr_changed) { | |
285 | info.attributes = new_nwattr; | |
286 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(new_dir), new_dir, _new_name, DM_ATTRIBUTES, &info); | |
287 | /* ignore errors */ | |
288 | } | |
289 | return(res); | |
290 | } | |
291 | #endif /* CONFIG_NCPFS_STRONG */ | |
292 | ||
293 | ||
294 | static int | |
2e54eb96 | 295 | ncp_lookup_validate(struct dentry *dentry, struct nameidata *nd) |
1da177e4 LT |
296 | { |
297 | struct ncp_server *server; | |
298 | struct dentry *parent; | |
299 | struct inode *dir; | |
300 | struct ncp_entry_info finfo; | |
301 | int res, val = 0, len; | |
302 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
303 | ||
304 | parent = dget_parent(dentry); | |
305 | dir = parent->d_inode; | |
306 | ||
307 | if (!dentry->d_inode) | |
308 | goto finished; | |
309 | ||
310 | server = NCP_SERVER(dir); | |
311 | ||
1da177e4 LT |
312 | /* |
313 | * Inspired by smbfs: | |
314 | * The default validation is based on dentry age: | |
315 | * We set the max age at mount time. (But each | |
316 | * successful server lookup renews the timestamp.) | |
317 | */ | |
318 | val = NCP_TEST_AGE(server, dentry); | |
319 | if (val) | |
320 | goto finished; | |
321 | ||
322 | DDPRINTK("ncp_lookup_validate: %s/%s not valid, age=%ld, server lookup\n", | |
323 | dentry->d_parent->d_name.name, dentry->d_name.name, | |
324 | NCP_GET_AGE(dentry)); | |
325 | ||
326 | len = sizeof(__name); | |
327 | if (ncp_is_server_root(dir)) { | |
328 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
329 | dentry->d_name.len, 1); | |
2e54eb96 | 330 | if (!res) { |
1da177e4 | 331 | res = ncp_lookup_volume(server, __name, &(finfo.i)); |
2e54eb96 PV |
332 | if (!res) |
333 | ncp_update_known_namespace(server, finfo.i.volNumber, NULL); | |
334 | } | |
1da177e4 LT |
335 | } else { |
336 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
337 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
338 | if (!res) | |
339 | res = ncp_obtain_info(server, dir, __name, &(finfo.i)); | |
340 | } | |
341 | finfo.volume = finfo.i.volNumber; | |
342 | DDPRINTK("ncp_lookup_validate: looked for %s/%s, res=%d\n", | |
343 | dentry->d_parent->d_name.name, __name, res); | |
344 | /* | |
345 | * If we didn't find it, or if it has a different dirEntNum to | |
346 | * what we remember, it's not valid any more. | |
347 | */ | |
348 | if (!res) { | |
2e54eb96 PV |
349 | struct inode *inode = dentry->d_inode; |
350 | ||
351 | mutex_lock(&inode->i_mutex); | |
352 | if (finfo.i.dirEntNum == NCP_FINFO(inode)->dirEntNum) { | |
1da177e4 LT |
353 | ncp_new_dentry(dentry); |
354 | val=1; | |
355 | } else | |
356 | DDPRINTK("ncp_lookup_validate: found, but dirEntNum changed\n"); | |
357 | ||
2e54eb96 PV |
358 | ncp_update_inode2(inode, &finfo); |
359 | mutex_unlock(&inode->i_mutex); | |
1da177e4 LT |
360 | } |
361 | ||
362 | finished: | |
363 | DDPRINTK("ncp_lookup_validate: result=%d\n", val); | |
364 | dput(parent); | |
365 | return val; | |
366 | } | |
367 | ||
1da177e4 LT |
368 | static struct dentry * |
369 | ncp_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos) | |
370 | { | |
371 | struct dentry *dent = dentry; | |
372 | struct list_head *next; | |
373 | ||
374 | if (d_validate(dent, parent)) { | |
375 | if (dent->d_name.len <= NCP_MAXPATHLEN && | |
376 | (unsigned long)dent->d_fsdata == fpos) { | |
377 | if (!dent->d_inode) { | |
378 | dput(dent); | |
379 | dent = NULL; | |
380 | } | |
381 | return dent; | |
382 | } | |
383 | dput(dent); | |
384 | } | |
385 | ||
386 | /* If a pointer is invalid, we search the dentry. */ | |
387 | spin_lock(&dcache_lock); | |
388 | next = parent->d_subdirs.next; | |
389 | while (next != &parent->d_subdirs) { | |
5160ee6f | 390 | dent = list_entry(next, struct dentry, d_u.d_child); |
1da177e4 LT |
391 | if ((unsigned long)dent->d_fsdata == fpos) { |
392 | if (dent->d_inode) | |
393 | dget_locked(dent); | |
394 | else | |
395 | dent = NULL; | |
396 | spin_unlock(&dcache_lock); | |
397 | goto out; | |
398 | } | |
399 | next = next->next; | |
400 | } | |
401 | spin_unlock(&dcache_lock); | |
402 | return NULL; | |
403 | ||
404 | out: | |
405 | return dent; | |
406 | } | |
407 | ||
408 | static time_t ncp_obtain_mtime(struct dentry *dentry) | |
409 | { | |
410 | struct inode *inode = dentry->d_inode; | |
411 | struct ncp_server *server = NCP_SERVER(inode); | |
412 | struct nw_info_struct i; | |
413 | ||
414 | if (!ncp_conn_valid(server) || ncp_is_server_root(inode)) | |
415 | return 0; | |
416 | ||
417 | if (ncp_obtain_info(server, inode, NULL, &i)) | |
418 | return 0; | |
419 | ||
420 | return ncp_date_dos2unix(i.modifyTime, i.modifyDate); | |
421 | } | |
422 | ||
423 | static int ncp_readdir(struct file *filp, void *dirent, filldir_t filldir) | |
424 | { | |
92e5baef | 425 | struct dentry *dentry = filp->f_path.dentry; |
1da177e4 LT |
426 | struct inode *inode = dentry->d_inode; |
427 | struct page *page = NULL; | |
428 | struct ncp_server *server = NCP_SERVER(inode); | |
429 | union ncp_dir_cache *cache = NULL; | |
430 | struct ncp_cache_control ctl; | |
431 | int result, mtime_valid = 0; | |
432 | time_t mtime = 0; | |
433 | ||
1da177e4 LT |
434 | ctl.page = NULL; |
435 | ctl.cache = NULL; | |
436 | ||
437 | DDPRINTK("ncp_readdir: reading %s/%s, pos=%d\n", | |
438 | dentry->d_parent->d_name.name, dentry->d_name.name, | |
439 | (int) filp->f_pos); | |
440 | ||
441 | result = -EIO; | |
2e54eb96 | 442 | /* Do not generate '.' and '..' when server is dead. */ |
1da177e4 LT |
443 | if (!ncp_conn_valid(server)) |
444 | goto out; | |
445 | ||
446 | result = 0; | |
447 | if (filp->f_pos == 0) { | |
448 | if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR)) | |
449 | goto out; | |
450 | filp->f_pos = 1; | |
451 | } | |
452 | if (filp->f_pos == 1) { | |
453 | if (filldir(dirent, "..", 2, 1, parent_ino(dentry), DT_DIR)) | |
454 | goto out; | |
455 | filp->f_pos = 2; | |
456 | } | |
457 | ||
458 | page = grab_cache_page(&inode->i_data, 0); | |
459 | if (!page) | |
460 | goto read_really; | |
461 | ||
462 | ctl.cache = cache = kmap(page); | |
463 | ctl.head = cache->head; | |
464 | ||
465 | if (!PageUptodate(page) || !ctl.head.eof) | |
466 | goto init_cache; | |
467 | ||
468 | if (filp->f_pos == 2) { | |
469 | if (jiffies - ctl.head.time >= NCP_MAX_AGE(server)) | |
470 | goto init_cache; | |
471 | ||
472 | mtime = ncp_obtain_mtime(dentry); | |
473 | mtime_valid = 1; | |
474 | if ((!mtime) || (mtime != ctl.head.mtime)) | |
475 | goto init_cache; | |
476 | } | |
477 | ||
478 | if (filp->f_pos > ctl.head.end) | |
479 | goto finished; | |
480 | ||
481 | ctl.fpos = filp->f_pos + (NCP_DIRCACHE_START - 2); | |
482 | ctl.ofs = ctl.fpos / NCP_DIRCACHE_SIZE; | |
483 | ctl.idx = ctl.fpos % NCP_DIRCACHE_SIZE; | |
484 | ||
485 | for (;;) { | |
486 | if (ctl.ofs != 0) { | |
487 | ctl.page = find_lock_page(&inode->i_data, ctl.ofs); | |
488 | if (!ctl.page) | |
489 | goto invalid_cache; | |
490 | ctl.cache = kmap(ctl.page); | |
491 | if (!PageUptodate(ctl.page)) | |
492 | goto invalid_cache; | |
493 | } | |
494 | while (ctl.idx < NCP_DIRCACHE_SIZE) { | |
495 | struct dentry *dent; | |
496 | int res; | |
497 | ||
498 | dent = ncp_dget_fpos(ctl.cache->dentry[ctl.idx], | |
499 | dentry, filp->f_pos); | |
500 | if (!dent) | |
501 | goto invalid_cache; | |
502 | res = filldir(dirent, dent->d_name.name, | |
503 | dent->d_name.len, filp->f_pos, | |
504 | dent->d_inode->i_ino, DT_UNKNOWN); | |
505 | dput(dent); | |
506 | if (res) | |
507 | goto finished; | |
508 | filp->f_pos += 1; | |
509 | ctl.idx += 1; | |
510 | if (filp->f_pos > ctl.head.end) | |
511 | goto finished; | |
512 | } | |
513 | if (ctl.page) { | |
514 | kunmap(ctl.page); | |
515 | SetPageUptodate(ctl.page); | |
516 | unlock_page(ctl.page); | |
517 | page_cache_release(ctl.page); | |
518 | ctl.page = NULL; | |
519 | } | |
520 | ctl.idx = 0; | |
521 | ctl.ofs += 1; | |
522 | } | |
523 | invalid_cache: | |
524 | if (ctl.page) { | |
525 | kunmap(ctl.page); | |
526 | unlock_page(ctl.page); | |
527 | page_cache_release(ctl.page); | |
528 | ctl.page = NULL; | |
529 | } | |
530 | ctl.cache = cache; | |
531 | init_cache: | |
532 | ncp_invalidate_dircache_entries(dentry); | |
533 | if (!mtime_valid) { | |
534 | mtime = ncp_obtain_mtime(dentry); | |
535 | mtime_valid = 1; | |
536 | } | |
537 | ctl.head.mtime = mtime; | |
538 | ctl.head.time = jiffies; | |
539 | ctl.head.eof = 0; | |
540 | ctl.fpos = 2; | |
541 | ctl.ofs = 0; | |
542 | ctl.idx = NCP_DIRCACHE_START; | |
543 | ctl.filled = 0; | |
544 | ctl.valid = 1; | |
545 | read_really: | |
546 | if (ncp_is_server_root(inode)) { | |
547 | ncp_read_volume_list(filp, dirent, filldir, &ctl); | |
548 | } else { | |
549 | ncp_do_readdir(filp, dirent, filldir, &ctl); | |
550 | } | |
551 | ctl.head.end = ctl.fpos - 1; | |
552 | ctl.head.eof = ctl.valid; | |
553 | finished: | |
2e54eb96 PV |
554 | if (ctl.page) { |
555 | kunmap(ctl.page); | |
556 | SetPageUptodate(ctl.page); | |
557 | unlock_page(ctl.page); | |
558 | page_cache_release(ctl.page); | |
559 | } | |
1da177e4 LT |
560 | if (page) { |
561 | cache->head = ctl.head; | |
562 | kunmap(page); | |
563 | SetPageUptodate(page); | |
564 | unlock_page(page); | |
565 | page_cache_release(page); | |
566 | } | |
1da177e4 | 567 | out: |
1da177e4 LT |
568 | return result; |
569 | } | |
570 | ||
571 | static int | |
572 | ncp_fill_cache(struct file *filp, void *dirent, filldir_t filldir, | |
2e54eb96 PV |
573 | struct ncp_cache_control *ctrl, struct ncp_entry_info *entry, |
574 | int inval_childs) | |
1da177e4 | 575 | { |
92e5baef | 576 | struct dentry *newdent, *dentry = filp->f_path.dentry; |
2e54eb96 | 577 | struct inode *dir = dentry->d_inode; |
1da177e4 LT |
578 | struct ncp_cache_control ctl = *ctrl; |
579 | struct qstr qname; | |
580 | int valid = 0; | |
581 | int hashed = 0; | |
582 | ino_t ino = 0; | |
583 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
584 | ||
585 | qname.len = sizeof(__name); | |
2e54eb96 | 586 | if (ncp_vol2io(NCP_SERVER(dir), __name, &qname.len, |
1da177e4 | 587 | entry->i.entryName, entry->i.nameLen, |
2e54eb96 | 588 | !ncp_preserve_entry_case(dir, entry->i.NSCreator))) |
1da177e4 LT |
589 | return 1; /* I'm not sure */ |
590 | ||
591 | qname.name = __name; | |
592 | qname.hash = full_name_hash(qname.name, qname.len); | |
593 | ||
594 | if (dentry->d_op && dentry->d_op->d_hash) | |
595 | if (dentry->d_op->d_hash(dentry, &qname) != 0) | |
596 | goto end_advance; | |
597 | ||
598 | newdent = d_lookup(dentry, &qname); | |
599 | ||
600 | if (!newdent) { | |
601 | newdent = d_alloc(dentry, &qname); | |
602 | if (!newdent) | |
603 | goto end_advance; | |
604 | } else { | |
605 | hashed = 1; | |
2e54eb96 PV |
606 | |
607 | /* If case sensitivity changed for this volume, all entries below this one | |
608 | should be thrown away. This entry itself is not affected, as its case | |
609 | sensitivity is controlled by its own parent. */ | |
610 | if (inval_childs) | |
611 | shrink_dcache_parent(newdent); | |
612 | ||
613 | /* | |
614 | * It is not as dangerous as it looks. NetWare's OS2 namespace is | |
615 | * case preserving yet case insensitive. So we update dentry's name | |
616 | * as received from server. We found dentry via d_lookup with our | |
617 | * hash, so we know that hash does not change, and so replacing name | |
618 | * should be reasonably safe. | |
619 | */ | |
620 | if (qname.len == newdent->d_name.len && | |
621 | memcmp(newdent->d_name.name, qname.name, newdent->d_name.len)) { | |
622 | struct inode *inode = newdent->d_inode; | |
623 | ||
624 | /* | |
625 | * Inside ncpfs all uses of d_name are either for debugging, | |
626 | * or on functions which acquire inode mutex (mknod, creat, | |
627 | * lookup). So grab i_mutex here, to be sure. d_path | |
628 | * uses dcache_lock when generating path, so we should too. | |
629 | * And finally d_compare is protected by dentry's d_lock, so | |
630 | * here we go. | |
631 | */ | |
632 | if (inode) | |
633 | mutex_lock(&inode->i_mutex); | |
634 | spin_lock(&dcache_lock); | |
635 | spin_lock(&newdent->d_lock); | |
636 | memcpy((char *) newdent->d_name.name, qname.name, | |
637 | newdent->d_name.len); | |
638 | spin_unlock(&newdent->d_lock); | |
639 | spin_unlock(&dcache_lock); | |
640 | if (inode) | |
641 | mutex_unlock(&inode->i_mutex); | |
642 | } | |
1da177e4 LT |
643 | } |
644 | ||
645 | if (!newdent->d_inode) { | |
2e54eb96 PV |
646 | struct inode *inode; |
647 | ||
1da177e4 | 648 | entry->opened = 0; |
2e54eb96 PV |
649 | entry->ino = iunique(dir->i_sb, 2); |
650 | inode = ncp_iget(dir->i_sb, entry); | |
651 | if (inode) { | |
1da177e4 | 652 | newdent->d_op = &ncp_dentry_operations; |
2e54eb96 | 653 | d_instantiate(newdent, inode); |
1da177e4 LT |
654 | if (!hashed) |
655 | d_rehash(newdent); | |
656 | } | |
2e54eb96 PV |
657 | } else { |
658 | struct inode *inode = newdent->d_inode; | |
659 | ||
660 | mutex_lock(&inode->i_mutex); | |
661 | ncp_update_inode2(inode, entry); | |
662 | mutex_unlock(&inode->i_mutex); | |
663 | } | |
1da177e4 LT |
664 | |
665 | if (newdent->d_inode) { | |
666 | ino = newdent->d_inode->i_ino; | |
667 | newdent->d_fsdata = (void *) ctl.fpos; | |
668 | ncp_new_dentry(newdent); | |
669 | } | |
670 | ||
671 | if (ctl.idx >= NCP_DIRCACHE_SIZE) { | |
672 | if (ctl.page) { | |
673 | kunmap(ctl.page); | |
674 | SetPageUptodate(ctl.page); | |
675 | unlock_page(ctl.page); | |
676 | page_cache_release(ctl.page); | |
677 | } | |
678 | ctl.cache = NULL; | |
679 | ctl.idx -= NCP_DIRCACHE_SIZE; | |
680 | ctl.ofs += 1; | |
2e54eb96 | 681 | ctl.page = grab_cache_page(&dir->i_data, ctl.ofs); |
1da177e4 LT |
682 | if (ctl.page) |
683 | ctl.cache = kmap(ctl.page); | |
684 | } | |
685 | if (ctl.cache) { | |
686 | ctl.cache->dentry[ctl.idx] = newdent; | |
687 | valid = 1; | |
688 | } | |
689 | dput(newdent); | |
690 | end_advance: | |
691 | if (!valid) | |
692 | ctl.valid = 0; | |
693 | if (!ctl.filled && (ctl.fpos == filp->f_pos)) { | |
694 | if (!ino) | |
695 | ino = find_inode_number(dentry, &qname); | |
696 | if (!ino) | |
2e54eb96 | 697 | ino = iunique(dir->i_sb, 2); |
1da177e4 LT |
698 | ctl.filled = filldir(dirent, qname.name, qname.len, |
699 | filp->f_pos, ino, DT_UNKNOWN); | |
700 | if (!ctl.filled) | |
701 | filp->f_pos += 1; | |
702 | } | |
703 | ctl.fpos += 1; | |
704 | ctl.idx += 1; | |
705 | *ctrl = ctl; | |
706 | return (ctl.valid || !ctl.filled); | |
707 | } | |
708 | ||
709 | static void | |
710 | ncp_read_volume_list(struct file *filp, void *dirent, filldir_t filldir, | |
711 | struct ncp_cache_control *ctl) | |
712 | { | |
92e5baef | 713 | struct dentry *dentry = filp->f_path.dentry; |
1da177e4 LT |
714 | struct inode *inode = dentry->d_inode; |
715 | struct ncp_server *server = NCP_SERVER(inode); | |
716 | struct ncp_volume_info info; | |
717 | struct ncp_entry_info entry; | |
718 | int i; | |
719 | ||
720 | DPRINTK("ncp_read_volume_list: pos=%ld\n", | |
721 | (unsigned long) filp->f_pos); | |
722 | ||
723 | for (i = 0; i < NCP_NUMBER_OF_VOLUMES; i++) { | |
2e54eb96 | 724 | int inval_dentry; |
1da177e4 LT |
725 | |
726 | if (ncp_get_volume_info_with_number(server, i, &info) != 0) | |
727 | return; | |
728 | if (!strlen(info.volume_name)) | |
729 | continue; | |
730 | ||
731 | DPRINTK("ncp_read_volume_list: found vol: %s\n", | |
732 | info.volume_name); | |
733 | ||
734 | if (ncp_lookup_volume(server, info.volume_name, | |
735 | &entry.i)) { | |
736 | DPRINTK("ncpfs: could not lookup vol %s\n", | |
737 | info.volume_name); | |
738 | continue; | |
739 | } | |
2e54eb96 | 740 | inval_dentry = ncp_update_known_namespace(server, entry.i.volNumber, NULL); |
1da177e4 | 741 | entry.volume = entry.i.volNumber; |
2e54eb96 | 742 | if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry, inval_dentry)) |
1da177e4 LT |
743 | return; |
744 | } | |
745 | } | |
746 | ||
747 | static void | |
748 | ncp_do_readdir(struct file *filp, void *dirent, filldir_t filldir, | |
749 | struct ncp_cache_control *ctl) | |
750 | { | |
92e5baef | 751 | struct dentry *dentry = filp->f_path.dentry; |
1da177e4 LT |
752 | struct inode *dir = dentry->d_inode; |
753 | struct ncp_server *server = NCP_SERVER(dir); | |
754 | struct nw_search_sequence seq; | |
755 | struct ncp_entry_info entry; | |
756 | int err; | |
757 | void* buf; | |
758 | int more; | |
759 | size_t bufsize; | |
760 | ||
761 | DPRINTK("ncp_do_readdir: %s/%s, fpos=%ld\n", | |
762 | dentry->d_parent->d_name.name, dentry->d_name.name, | |
763 | (unsigned long) filp->f_pos); | |
764 | PPRINTK("ncp_do_readdir: init %s, volnum=%d, dirent=%u\n", | |
765 | dentry->d_name.name, NCP_FINFO(dir)->volNumber, | |
766 | NCP_FINFO(dir)->dirEntNum); | |
767 | ||
768 | err = ncp_initialize_search(server, dir, &seq); | |
769 | if (err) { | |
770 | DPRINTK("ncp_do_readdir: init failed, err=%d\n", err); | |
771 | return; | |
772 | } | |
1da177e4 LT |
773 | /* We MUST NOT use server->buffer_size handshaked with server if we are |
774 | using UDP, as for UDP server uses max. buffer size determined by | |
775 | MTU, and for TCP server uses hardwired value 65KB (== 66560 bytes). | |
776 | So we use 128KB, just to be sure, as there is no way how to know | |
777 | this value in advance. */ | |
778 | bufsize = 131072; | |
779 | buf = vmalloc(bufsize); | |
780 | if (!buf) | |
781 | return; | |
782 | do { | |
783 | int cnt; | |
784 | char* rpl; | |
785 | size_t rpls; | |
786 | ||
787 | err = ncp_search_for_fileset(server, &seq, &more, &cnt, buf, bufsize, &rpl, &rpls); | |
788 | if (err) /* Error */ | |
789 | break; | |
790 | if (!cnt) /* prevent endless loop */ | |
791 | break; | |
792 | while (cnt--) { | |
793 | size_t onerpl; | |
794 | ||
795 | if (rpls < offsetof(struct nw_info_struct, entryName)) | |
796 | break; /* short packet */ | |
797 | ncp_extract_file_info(rpl, &entry.i); | |
798 | onerpl = offsetof(struct nw_info_struct, entryName) + entry.i.nameLen; | |
799 | if (rpls < onerpl) | |
800 | break; /* short packet */ | |
801 | (void)ncp_obtain_nfs_info(server, &entry.i); | |
802 | rpl += onerpl; | |
803 | rpls -= onerpl; | |
804 | entry.volume = entry.i.volNumber; | |
2e54eb96 | 805 | if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry, 0)) |
1da177e4 LT |
806 | break; |
807 | } | |
808 | } while (more); | |
809 | vfree(buf); | |
1da177e4 LT |
810 | return; |
811 | } | |
812 | ||
813 | int ncp_conn_logged_in(struct super_block *sb) | |
814 | { | |
815 | struct ncp_server* server = NCP_SBP(sb); | |
816 | int result; | |
817 | ||
818 | if (ncp_single_volume(server)) { | |
819 | int len; | |
820 | struct dentry* dent; | |
821 | __u32 volNumber; | |
822 | __le32 dirEntNum; | |
823 | __le32 DosDirNum; | |
824 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
825 | ||
826 | len = sizeof(__name); | |
827 | result = ncp_io2vol(server, __name, &len, server->m.mounted_vol, | |
828 | strlen(server->m.mounted_vol), 1); | |
829 | if (result) | |
830 | goto out; | |
831 | result = -ENOENT; | |
832 | if (ncp_get_volume_root(server, __name, &volNumber, &dirEntNum, &DosDirNum)) { | |
833 | PPRINTK("ncp_conn_logged_in: %s not found\n", | |
834 | server->m.mounted_vol); | |
835 | goto out; | |
836 | } | |
837 | dent = sb->s_root; | |
838 | if (dent) { | |
839 | struct inode* ino = dent->d_inode; | |
840 | if (ino) { | |
2e54eb96 | 841 | ncp_update_known_namespace(server, volNumber, NULL); |
1da177e4 LT |
842 | NCP_FINFO(ino)->volNumber = volNumber; |
843 | NCP_FINFO(ino)->dirEntNum = dirEntNum; | |
844 | NCP_FINFO(ino)->DosDirNum = DosDirNum; | |
2e54eb96 | 845 | result = 0; |
1da177e4 LT |
846 | } else { |
847 | DPRINTK("ncpfs: sb->s_root->d_inode == NULL!\n"); | |
848 | } | |
849 | } else { | |
850 | DPRINTK("ncpfs: sb->s_root == NULL!\n"); | |
851 | } | |
2e54eb96 PV |
852 | } else |
853 | result = 0; | |
1da177e4 LT |
854 | |
855 | out: | |
856 | return result; | |
857 | } | |
858 | ||
859 | static struct dentry *ncp_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) | |
860 | { | |
861 | struct ncp_server *server = NCP_SERVER(dir); | |
862 | struct inode *inode = NULL; | |
863 | struct ncp_entry_info finfo; | |
864 | int error, res, len; | |
865 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
866 | ||
1da177e4 LT |
867 | error = -EIO; |
868 | if (!ncp_conn_valid(server)) | |
869 | goto finished; | |
870 | ||
871 | PPRINTK("ncp_lookup: server lookup for %s/%s\n", | |
872 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
873 | ||
874 | len = sizeof(__name); | |
875 | if (ncp_is_server_root(dir)) { | |
876 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
877 | dentry->d_name.len, 1); | |
878 | if (!res) | |
879 | res = ncp_lookup_volume(server, __name, &(finfo.i)); | |
2e54eb96 PV |
880 | if (!res) |
881 | ncp_update_known_namespace(server, finfo.i.volNumber, NULL); | |
1da177e4 LT |
882 | } else { |
883 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
884 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
885 | if (!res) | |
886 | res = ncp_obtain_info(server, dir, __name, &(finfo.i)); | |
887 | } | |
888 | PPRINTK("ncp_lookup: looked for %s/%s, res=%d\n", | |
889 | dentry->d_parent->d_name.name, __name, res); | |
890 | /* | |
891 | * If we didn't find an entry, make a negative dentry. | |
892 | */ | |
893 | if (res) | |
894 | goto add_entry; | |
895 | ||
896 | /* | |
897 | * Create an inode for the entry. | |
898 | */ | |
899 | finfo.opened = 0; | |
900 | finfo.ino = iunique(dir->i_sb, 2); | |
901 | finfo.volume = finfo.i.volNumber; | |
902 | error = -EACCES; | |
903 | inode = ncp_iget(dir->i_sb, &finfo); | |
904 | ||
905 | if (inode) { | |
906 | ncp_new_dentry(dentry); | |
907 | add_entry: | |
908 | dentry->d_op = &ncp_dentry_operations; | |
909 | d_add(dentry, inode); | |
910 | error = 0; | |
911 | } | |
912 | ||
913 | finished: | |
914 | PPRINTK("ncp_lookup: result=%d\n", error); | |
1da177e4 LT |
915 | return ERR_PTR(error); |
916 | } | |
917 | ||
918 | /* | |
919 | * This code is common to create, mkdir, and mknod. | |
920 | */ | |
921 | static int ncp_instantiate(struct inode *dir, struct dentry *dentry, | |
922 | struct ncp_entry_info *finfo) | |
923 | { | |
924 | struct inode *inode; | |
925 | int error = -EINVAL; | |
926 | ||
927 | finfo->ino = iunique(dir->i_sb, 2); | |
928 | inode = ncp_iget(dir->i_sb, finfo); | |
929 | if (!inode) | |
930 | goto out_close; | |
931 | d_instantiate(dentry,inode); | |
932 | error = 0; | |
933 | out: | |
934 | return error; | |
935 | ||
936 | out_close: | |
937 | PPRINTK("ncp_instantiate: %s/%s failed, closing file\n", | |
938 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
939 | ncp_close_file(NCP_SERVER(dir), finfo->file_handle); | |
940 | goto out; | |
941 | } | |
942 | ||
943 | int ncp_create_new(struct inode *dir, struct dentry *dentry, int mode, | |
944 | dev_t rdev, __le32 attributes) | |
945 | { | |
946 | struct ncp_server *server = NCP_SERVER(dir); | |
947 | struct ncp_entry_info finfo; | |
948 | int error, result, len; | |
949 | int opmode; | |
950 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
951 | ||
952 | PPRINTK("ncp_create_new: creating %s/%s, mode=%x\n", | |
953 | dentry->d_parent->d_name.name, dentry->d_name.name, mode); | |
954 | ||
1da177e4 LT |
955 | ncp_age_dentry(server, dentry); |
956 | len = sizeof(__name); | |
957 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
958 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
959 | if (error) | |
960 | goto out; | |
961 | ||
962 | error = -EACCES; | |
963 | ||
964 | if (S_ISREG(mode) && | |
965 | (server->m.flags & NCP_MOUNT_EXTRAS) && | |
966 | (mode & S_IXUGO)) | |
967 | attributes |= aSYSTEM | aSHARED; | |
968 | ||
969 | result = ncp_open_create_file_or_subdir(server, dir, __name, | |
970 | OC_MODE_CREATE | OC_MODE_OPEN | OC_MODE_REPLACE, | |
971 | attributes, AR_READ | AR_WRITE, &finfo); | |
972 | opmode = O_RDWR; | |
973 | if (result) { | |
974 | result = ncp_open_create_file_or_subdir(server, dir, __name, | |
975 | OC_MODE_CREATE | OC_MODE_OPEN | OC_MODE_REPLACE, | |
976 | attributes, AR_WRITE, &finfo); | |
977 | if (result) { | |
978 | if (result == 0x87) | |
979 | error = -ENAMETOOLONG; | |
2e54eb96 PV |
980 | else if (result < 0) |
981 | error = result; | |
1da177e4 LT |
982 | DPRINTK("ncp_create: %s/%s failed\n", |
983 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
984 | goto out; | |
985 | } | |
986 | opmode = O_WRONLY; | |
987 | } | |
988 | finfo.access = opmode; | |
989 | if (ncp_is_nfs_extras(server, finfo.volume)) { | |
990 | finfo.i.nfs.mode = mode; | |
991 | finfo.i.nfs.rdev = new_encode_dev(rdev); | |
992 | if (ncp_modify_nfs_info(server, finfo.volume, | |
993 | finfo.i.dirEntNum, | |
994 | mode, new_encode_dev(rdev)) != 0) | |
995 | goto out; | |
996 | } | |
997 | ||
998 | error = ncp_instantiate(dir, dentry, &finfo); | |
999 | out: | |
1da177e4 LT |
1000 | return error; |
1001 | } | |
1002 | ||
1003 | static int ncp_create(struct inode *dir, struct dentry *dentry, int mode, | |
1004 | struct nameidata *nd) | |
1005 | { | |
1006 | return ncp_create_new(dir, dentry, mode, 0, 0); | |
1007 | } | |
1008 | ||
1009 | static int ncp_mkdir(struct inode *dir, struct dentry *dentry, int mode) | |
1010 | { | |
1011 | struct ncp_entry_info finfo; | |
1012 | struct ncp_server *server = NCP_SERVER(dir); | |
1013 | int error, len; | |
1014 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
1015 | ||
1016 | DPRINTK("ncp_mkdir: making %s/%s\n", | |
1017 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
1018 | ||
1da177e4 LT |
1019 | ncp_age_dentry(server, dentry); |
1020 | len = sizeof(__name); | |
1021 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
1022 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
1023 | if (error) | |
1024 | goto out; | |
1025 | ||
2e54eb96 | 1026 | error = ncp_open_create_file_or_subdir(server, dir, __name, |
1da177e4 LT |
1027 | OC_MODE_CREATE, aDIR, |
1028 | cpu_to_le16(0xffff), | |
2e54eb96 PV |
1029 | &finfo); |
1030 | if (error == 0) { | |
1da177e4 LT |
1031 | if (ncp_is_nfs_extras(server, finfo.volume)) { |
1032 | mode |= S_IFDIR; | |
1033 | finfo.i.nfs.mode = mode; | |
1034 | if (ncp_modify_nfs_info(server, | |
1035 | finfo.volume, | |
1036 | finfo.i.dirEntNum, | |
1037 | mode, 0) != 0) | |
1038 | goto out; | |
1039 | } | |
1040 | error = ncp_instantiate(dir, dentry, &finfo); | |
2e54eb96 PV |
1041 | } else if (error > 0) { |
1042 | error = -EACCES; | |
1da177e4 LT |
1043 | } |
1044 | out: | |
1da177e4 LT |
1045 | return error; |
1046 | } | |
1047 | ||
1048 | static int ncp_rmdir(struct inode *dir, struct dentry *dentry) | |
1049 | { | |
1050 | struct ncp_server *server = NCP_SERVER(dir); | |
1051 | int error, result, len; | |
1052 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
1053 | ||
1054 | DPRINTK("ncp_rmdir: removing %s/%s\n", | |
1055 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
1056 | ||
1da177e4 LT |
1057 | error = -EBUSY; |
1058 | if (!d_unhashed(dentry)) | |
1059 | goto out; | |
1060 | ||
1061 | len = sizeof(__name); | |
1062 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
1063 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
1064 | if (error) | |
1065 | goto out; | |
1066 | ||
1067 | result = ncp_del_file_or_subdir(server, dir, __name); | |
1068 | switch (result) { | |
1069 | case 0x00: | |
1070 | error = 0; | |
1071 | break; | |
1072 | case 0x85: /* unauthorized to delete file */ | |
1073 | case 0x8A: /* unauthorized to delete file */ | |
1074 | error = -EACCES; | |
1075 | break; | |
1076 | case 0x8F: | |
1077 | case 0x90: /* read only */ | |
1078 | error = -EPERM; | |
1079 | break; | |
1080 | case 0x9F: /* in use by another client */ | |
1081 | error = -EBUSY; | |
1082 | break; | |
1083 | case 0xA0: /* directory not empty */ | |
1084 | error = -ENOTEMPTY; | |
1085 | break; | |
1086 | case 0xFF: /* someone deleted file */ | |
1087 | error = -ENOENT; | |
1088 | break; | |
1089 | default: | |
2e54eb96 | 1090 | error = result < 0 ? result : -EACCES; |
1da177e4 LT |
1091 | break; |
1092 | } | |
1093 | out: | |
1da177e4 LT |
1094 | return error; |
1095 | } | |
1096 | ||
1097 | static int ncp_unlink(struct inode *dir, struct dentry *dentry) | |
1098 | { | |
1099 | struct inode *inode = dentry->d_inode; | |
1100 | struct ncp_server *server; | |
1101 | int error; | |
1102 | ||
1da177e4 LT |
1103 | server = NCP_SERVER(dir); |
1104 | DPRINTK("ncp_unlink: unlinking %s/%s\n", | |
1105 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
1106 | ||
1da177e4 LT |
1107 | /* |
1108 | * Check whether to close the file ... | |
1109 | */ | |
1110 | if (inode) { | |
1111 | PPRINTK("ncp_unlink: closing file\n"); | |
1112 | ncp_make_closed(inode); | |
1113 | } | |
1114 | ||
1115 | error = ncp_del_file_or_subdir2(server, dentry); | |
1116 | #ifdef CONFIG_NCPFS_STRONG | |
1117 | /* 9C is Invalid path.. It should be 8F, 90 - read only, but | |
1118 | it is not :-( */ | |
1119 | if ((error == 0x9C || error == 0x90) && server->m.flags & NCP_MOUNT_STRONG) { /* R/O */ | |
1120 | error = ncp_force_unlink(dir, dentry); | |
1121 | } | |
1122 | #endif | |
1123 | switch (error) { | |
1124 | case 0x00: | |
1125 | DPRINTK("ncp: removed %s/%s\n", | |
1126 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
1127 | break; | |
1128 | case 0x85: | |
1129 | case 0x8A: | |
1130 | error = -EACCES; | |
1131 | break; | |
1132 | case 0x8D: /* some files in use */ | |
1133 | case 0x8E: /* all files in use */ | |
1134 | error = -EBUSY; | |
1135 | break; | |
1136 | case 0x8F: /* some read only */ | |
1137 | case 0x90: /* all read only */ | |
1138 | case 0x9C: /* !!! returned when in-use or read-only by NW4 */ | |
1139 | error = -EPERM; | |
1140 | break; | |
1141 | case 0xFF: | |
1142 | error = -ENOENT; | |
1143 | break; | |
1144 | default: | |
2e54eb96 | 1145 | error = error < 0 ? error : -EACCES; |
1da177e4 LT |
1146 | break; |
1147 | } | |
1da177e4 LT |
1148 | return error; |
1149 | } | |
1150 | ||
1151 | static int ncp_rename(struct inode *old_dir, struct dentry *old_dentry, | |
1152 | struct inode *new_dir, struct dentry *new_dentry) | |
1153 | { | |
1154 | struct ncp_server *server = NCP_SERVER(old_dir); | |
1155 | int error; | |
1156 | int old_len, new_len; | |
1157 | __u8 __old_name[NCP_MAXPATHLEN + 1], __new_name[NCP_MAXPATHLEN + 1]; | |
1158 | ||
1159 | DPRINTK("ncp_rename: %s/%s to %s/%s\n", | |
1160 | old_dentry->d_parent->d_name.name, old_dentry->d_name.name, | |
1161 | new_dentry->d_parent->d_name.name, new_dentry->d_name.name); | |
1162 | ||
1da177e4 LT |
1163 | ncp_age_dentry(server, old_dentry); |
1164 | ncp_age_dentry(server, new_dentry); | |
1165 | ||
1166 | old_len = sizeof(__old_name); | |
1167 | error = ncp_io2vol(server, __old_name, &old_len, | |
1168 | old_dentry->d_name.name, old_dentry->d_name.len, | |
1169 | !ncp_preserve_case(old_dir)); | |
1170 | if (error) | |
1171 | goto out; | |
1172 | ||
1173 | new_len = sizeof(__new_name); | |
1174 | error = ncp_io2vol(server, __new_name, &new_len, | |
1175 | new_dentry->d_name.name, new_dentry->d_name.len, | |
1176 | !ncp_preserve_case(new_dir)); | |
1177 | if (error) | |
1178 | goto out; | |
1179 | ||
1180 | error = ncp_ren_or_mov_file_or_subdir(server, old_dir, __old_name, | |
1181 | new_dir, __new_name); | |
1182 | #ifdef CONFIG_NCPFS_STRONG | |
1183 | if ((error == 0x90 || error == 0x8B || error == -EACCES) && | |
1184 | server->m.flags & NCP_MOUNT_STRONG) { /* RO */ | |
1185 | error = ncp_force_rename(old_dir, old_dentry, __old_name, | |
1186 | new_dir, new_dentry, __new_name); | |
1187 | } | |
1188 | #endif | |
1189 | switch (error) { | |
1190 | case 0x00: | |
1191 | DPRINTK("ncp renamed %s -> %s.\n", | |
1192 | old_dentry->d_name.name,new_dentry->d_name.name); | |
1193 | break; | |
1194 | case 0x9E: | |
1195 | error = -ENAMETOOLONG; | |
1196 | break; | |
1197 | case 0xFF: | |
1198 | error = -ENOENT; | |
1199 | break; | |
1200 | default: | |
2e54eb96 | 1201 | error = error < 0 ? error : -EACCES; |
1da177e4 LT |
1202 | break; |
1203 | } | |
1204 | out: | |
1da177e4 LT |
1205 | return error; |
1206 | } | |
1207 | ||
1208 | static int ncp_mknod(struct inode * dir, struct dentry *dentry, | |
1209 | int mode, dev_t rdev) | |
1210 | { | |
1211 | if (!new_valid_dev(rdev)) | |
1212 | return -EINVAL; | |
1213 | if (ncp_is_nfs_extras(NCP_SERVER(dir), NCP_FINFO(dir)->volNumber)) { | |
1214 | DPRINTK(KERN_DEBUG "ncp_mknod: mode = 0%o\n", mode); | |
1215 | return ncp_create_new(dir, dentry, mode, rdev, 0); | |
1216 | } | |
1217 | return -EPERM; /* Strange, but true */ | |
1218 | } | |
1219 | ||
1220 | /* The following routines are taken directly from msdos-fs */ | |
1221 | ||
1222 | /* Linear day numbers of the respective 1sts in non-leap years. */ | |
1223 | ||
1224 | static int day_n[] = | |
1225 | {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, 0}; | |
1226 | /* Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec */ | |
1227 | ||
1228 | ||
1229 | extern struct timezone sys_tz; | |
1230 | ||
1231 | static int utc2local(int time) | |
1232 | { | |
1233 | return time - sys_tz.tz_minuteswest * 60; | |
1234 | } | |
1235 | ||
1236 | static int local2utc(int time) | |
1237 | { | |
1238 | return time + sys_tz.tz_minuteswest * 60; | |
1239 | } | |
1240 | ||
1241 | /* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */ | |
1242 | int | |
1243 | ncp_date_dos2unix(__le16 t, __le16 d) | |
1244 | { | |
1245 | unsigned short time = le16_to_cpu(t), date = le16_to_cpu(d); | |
1246 | int month, year, secs; | |
1247 | ||
1248 | /* first subtract and mask after that... Otherwise, if | |
1249 | date == 0, bad things happen */ | |
1250 | month = ((date >> 5) - 1) & 15; | |
1251 | year = date >> 9; | |
1252 | secs = (time & 31) * 2 + 60 * ((time >> 5) & 63) + (time >> 11) * 3600 + | |
1253 | 86400 * ((date & 31) - 1 + day_n[month] + (year / 4) + | |
1254 | year * 365 - ((year & 3) == 0 && month < 2 ? 1 : 0) + 3653); | |
1255 | /* days since 1.1.70 plus 80's leap day */ | |
1256 | return local2utc(secs); | |
1257 | } | |
1258 | ||
1259 | ||
1260 | /* Convert linear UNIX date to a MS-DOS time/date pair. */ | |
1261 | void | |
1262 | ncp_date_unix2dos(int unix_date, __le16 *time, __le16 *date) | |
1263 | { | |
1264 | int day, year, nl_day, month; | |
1265 | ||
1266 | unix_date = utc2local(unix_date); | |
1267 | *time = cpu_to_le16( | |
1268 | (unix_date % 60) / 2 + (((unix_date / 60) % 60) << 5) + | |
1269 | (((unix_date / 3600) % 24) << 11)); | |
1270 | day = unix_date / 86400 - 3652; | |
1271 | year = day / 365; | |
1272 | if ((year + 3) / 4 + 365 * year > day) | |
1273 | year--; | |
1274 | day -= (year + 3) / 4 + 365 * year; | |
1275 | if (day == 59 && !(year & 3)) { | |
1276 | nl_day = day; | |
1277 | month = 2; | |
1278 | } else { | |
1279 | nl_day = (year & 3) || day <= 59 ? day : day - 1; | |
c5df5913 | 1280 | for (month = 1; month < 12; month++) |
1da177e4 LT |
1281 | if (day_n[month] > nl_day) |
1282 | break; | |
1283 | } | |
1284 | *date = cpu_to_le16(nl_day - day_n[month - 1] + 1 + (month << 5) + (year << 9)); | |
1285 | } |