Commit | Line | Data |
---|---|---|
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> | |
34286d66 | 20 | #include <linux/namei.h> |
1da177e4 LT |
21 | #include <asm/uaccess.h> |
22 | #include <asm/byteorder.h> | |
1da177e4 | 23 | |
32c419d9 | 24 | #include "ncp_fs.h" |
1da177e4 LT |
25 | |
26 | static void ncp_read_volume_list(struct file *, void *, filldir_t, | |
27 | struct ncp_cache_control *); | |
28 | static void ncp_do_readdir(struct file *, void *, filldir_t, | |
29 | struct ncp_cache_control *); | |
30 | ||
31 | static int ncp_readdir(struct file *, void *, filldir_t); | |
32 | ||
ebfc3b49 | 33 | static int ncp_create(struct inode *, struct dentry *, umode_t, bool); |
00cd8dd3 | 34 | static struct dentry *ncp_lookup(struct inode *, struct dentry *, unsigned int); |
1da177e4 | 35 | static int ncp_unlink(struct inode *, struct dentry *); |
18bb1db3 | 36 | static int ncp_mkdir(struct inode *, struct dentry *, umode_t); |
1da177e4 LT |
37 | static int ncp_rmdir(struct inode *, struct dentry *); |
38 | static int ncp_rename(struct inode *, struct dentry *, | |
39 | struct inode *, struct dentry *); | |
40 | static int ncp_mknod(struct inode * dir, struct dentry *dentry, | |
1a67aafb | 41 | umode_t mode, dev_t rdev); |
1da177e4 LT |
42 | #if defined(CONFIG_NCPFS_EXTRAS) || defined(CONFIG_NCPFS_NFS_NS) |
43 | extern int ncp_symlink(struct inode *, struct dentry *, const char *); | |
44 | #else | |
45 | #define ncp_symlink NULL | |
46 | #endif | |
47 | ||
4b6f5d20 | 48 | const struct file_operations ncp_dir_operations = |
1da177e4 | 49 | { |
ca572727 | 50 | .llseek = generic_file_llseek, |
1da177e4 LT |
51 | .read = generic_read_dir, |
52 | .readdir = ncp_readdir, | |
93d84b6d | 53 | .unlocked_ioctl = ncp_ioctl, |
54f67f63 PV |
54 | #ifdef CONFIG_COMPAT |
55 | .compat_ioctl = ncp_compat_ioctl, | |
56 | #endif | |
1da177e4 LT |
57 | }; |
58 | ||
92e1d5be | 59 | const struct inode_operations ncp_dir_inode_operations = |
1da177e4 LT |
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 | */ | |
0b728e19 | 75 | static int ncp_lookup_validate(struct dentry *, unsigned int); |
b1e6a015 NP |
76 | static int ncp_hash_dentry(const struct dentry *, const struct inode *, |
77 | struct qstr *); | |
621e155a NP |
78 | static int ncp_compare_dentry(const struct dentry *, const struct inode *, |
79 | const struct dentry *, const struct inode *, | |
80 | unsigned int, const char *, const struct qstr *); | |
fe15ce44 | 81 | static int ncp_delete_dentry(const struct dentry *); |
1da177e4 | 82 | |
0378c405 | 83 | const struct dentry_operations ncp_dentry_operations = |
1da177e4 LT |
84 | { |
85 | .d_revalidate = ncp_lookup_validate, | |
86 | .d_hash = ncp_hash_dentry, | |
87 | .d_compare = ncp_compare_dentry, | |
88 | .d_delete = ncp_delete_dentry, | |
89 | }; | |
90 | ||
2e54eb96 PV |
91 | #define ncp_namespace(i) (NCP_SERVER(i)->name_space[NCP_FINFO(i)->volNumber]) |
92 | ||
93 | static inline int ncp_preserve_entry_case(struct inode *i, __u32 nscreator) | |
94 | { | |
95 | #ifdef CONFIG_NCPFS_SMALLDOS | |
96 | int ns = ncp_namespace(i); | |
97 | ||
98 | if ((ns == NW_NS_DOS) | |
99 | #ifdef CONFIG_NCPFS_OS2_NS | |
100 | || ((ns == NW_NS_OS2) && (nscreator == NW_NS_DOS)) | |
101 | #endif /* CONFIG_NCPFS_OS2_NS */ | |
102 | ) | |
103 | return 0; | |
104 | #endif /* CONFIG_NCPFS_SMALLDOS */ | |
105 | return 1; | |
106 | } | |
107 | ||
108 | #define ncp_preserve_case(i) (ncp_namespace(i) != NW_NS_DOS) | |
109 | ||
621e155a | 110 | static inline int ncp_case_sensitive(const struct inode *i) |
2e54eb96 PV |
111 | { |
112 | #ifdef CONFIG_NCPFS_NFS_NS | |
621e155a | 113 | return ncp_namespace(i) == NW_NS_NFS; |
2e54eb96 PV |
114 | #else |
115 | return 0; | |
116 | #endif /* CONFIG_NCPFS_NFS_NS */ | |
117 | } | |
118 | ||
1da177e4 LT |
119 | /* |
120 | * Note: leave the hash unchanged if the directory | |
121 | * is case-sensitive. | |
122 | */ | |
123 | static int | |
b1e6a015 NP |
124 | ncp_hash_dentry(const struct dentry *dentry, const struct inode *inode, |
125 | struct qstr *this) | |
1da177e4 | 126 | { |
b1e6a015 | 127 | if (!ncp_case_sensitive(inode)) { |
621e155a | 128 | struct super_block *sb = dentry->d_sb; |
2e54eb96 PV |
129 | struct nls_table *t; |
130 | unsigned long hash; | |
131 | int i; | |
1da177e4 | 132 | |
621e155a | 133 | t = NCP_IO_TABLE(sb); |
1da177e4 LT |
134 | hash = init_name_hash(); |
135 | for (i=0; i<this->len ; i++) | |
136 | hash = partial_name_hash(ncp_tolower(t, this->name[i]), | |
137 | hash); | |
138 | this->hash = end_name_hash(hash); | |
139 | } | |
140 | return 0; | |
141 | } | |
142 | ||
143 | static int | |
621e155a NP |
144 | ncp_compare_dentry(const struct dentry *parent, const struct inode *pinode, |
145 | const struct dentry *dentry, const struct inode *inode, | |
146 | unsigned int len, const char *str, const struct qstr *name) | |
1da177e4 | 147 | { |
621e155a | 148 | if (len != name->len) |
1da177e4 LT |
149 | return 1; |
150 | ||
621e155a NP |
151 | if (ncp_case_sensitive(pinode)) |
152 | return strncmp(str, name->name, len); | |
1da177e4 | 153 | |
621e155a | 154 | return ncp_strnicmp(NCP_IO_TABLE(pinode->i_sb), str, name->name, len); |
1da177e4 LT |
155 | } |
156 | ||
157 | /* | |
158 | * This is the callback from dput() when d_count is going to 0. | |
159 | * We use this to unhash dentries with bad inodes. | |
160 | * Closing files can be safely postponed until iput() - it's done there anyway. | |
161 | */ | |
162 | static int | |
fe15ce44 | 163 | ncp_delete_dentry(const struct dentry * dentry) |
1da177e4 LT |
164 | { |
165 | struct inode *inode = dentry->d_inode; | |
166 | ||
167 | if (inode) { | |
168 | if (is_bad_inode(inode)) | |
169 | return 1; | |
170 | } else | |
171 | { | |
172 | /* N.B. Unhash negative dentries? */ | |
173 | } | |
174 | return 0; | |
175 | } | |
176 | ||
177 | static inline int | |
178 | ncp_single_volume(struct ncp_server *server) | |
179 | { | |
180 | return (server->m.mounted_vol[0] != '\0'); | |
181 | } | |
182 | ||
183 | static inline int ncp_is_server_root(struct inode *inode) | |
184 | { | |
185 | return (!ncp_single_volume(NCP_SERVER(inode)) && | |
186 | inode == inode->i_sb->s_root->d_inode); | |
187 | } | |
188 | ||
189 | ||
190 | /* | |
191 | * This is the callback when the dcache has a lookup hit. | |
192 | */ | |
193 | ||
194 | ||
195 | #ifdef CONFIG_NCPFS_STRONG | |
196 | /* try to delete a readonly file (NW R bit set) */ | |
197 | ||
198 | static int | |
199 | ncp_force_unlink(struct inode *dir, struct dentry* dentry) | |
200 | { | |
201 | int res=0x9c,res2; | |
202 | struct nw_modify_dos_info info; | |
203 | __le32 old_nwattr; | |
204 | struct inode *inode; | |
205 | ||
206 | memset(&info, 0, sizeof(info)); | |
207 | ||
208 | /* remove the Read-Only flag on the NW server */ | |
209 | inode = dentry->d_inode; | |
210 | ||
211 | old_nwattr = NCP_FINFO(inode)->nwattr; | |
212 | info.attributes = old_nwattr & ~(aRONLY|aDELETEINHIBIT|aRENAMEINHIBIT); | |
213 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(inode), inode, NULL, DM_ATTRIBUTES, &info); | |
214 | if (res2) | |
215 | goto leave_me; | |
216 | ||
217 | /* now try again the delete operation */ | |
218 | res = ncp_del_file_or_subdir2(NCP_SERVER(dir), dentry); | |
219 | ||
220 | if (res) /* delete failed, set R bit again */ | |
221 | { | |
222 | info.attributes = old_nwattr; | |
223 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(inode), inode, NULL, DM_ATTRIBUTES, &info); | |
224 | if (res2) | |
225 | goto leave_me; | |
226 | } | |
227 | leave_me: | |
228 | return(res); | |
229 | } | |
230 | #endif /* CONFIG_NCPFS_STRONG */ | |
231 | ||
232 | #ifdef CONFIG_NCPFS_STRONG | |
233 | static int | |
234 | ncp_force_rename(struct inode *old_dir, struct dentry* old_dentry, char *_old_name, | |
235 | struct inode *new_dir, struct dentry* new_dentry, char *_new_name) | |
236 | { | |
237 | struct nw_modify_dos_info info; | |
238 | int res=0x90,res2; | |
239 | struct inode *old_inode = old_dentry->d_inode; | |
240 | __le32 old_nwattr = NCP_FINFO(old_inode)->nwattr; | |
241 | __le32 new_nwattr = 0; /* shut compiler warning */ | |
242 | int old_nwattr_changed = 0; | |
243 | int new_nwattr_changed = 0; | |
244 | ||
245 | memset(&info, 0, sizeof(info)); | |
246 | ||
247 | /* remove the Read-Only flag on the NW server */ | |
248 | ||
249 | info.attributes = old_nwattr & ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT); | |
250 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(old_inode), old_inode, NULL, DM_ATTRIBUTES, &info); | |
251 | if (!res2) | |
252 | old_nwattr_changed = 1; | |
253 | if (new_dentry && new_dentry->d_inode) { | |
254 | new_nwattr = NCP_FINFO(new_dentry->d_inode)->nwattr; | |
255 | info.attributes = new_nwattr & ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT); | |
256 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(new_dir), new_dir, _new_name, DM_ATTRIBUTES, &info); | |
257 | if (!res2) | |
258 | new_nwattr_changed = 1; | |
259 | } | |
260 | /* now try again the rename operation */ | |
261 | /* but only if something really happened */ | |
262 | if (new_nwattr_changed || old_nwattr_changed) { | |
263 | res = ncp_ren_or_mov_file_or_subdir(NCP_SERVER(old_dir), | |
264 | old_dir, _old_name, | |
265 | new_dir, _new_name); | |
266 | } | |
267 | if (res) | |
268 | goto leave_me; | |
269 | /* file was successfully renamed, so: | |
270 | do not set attributes on old file - it no longer exists | |
271 | copy attributes from old file to new */ | |
272 | new_nwattr_changed = old_nwattr_changed; | |
273 | new_nwattr = old_nwattr; | |
274 | old_nwattr_changed = 0; | |
275 | ||
276 | leave_me:; | |
277 | if (old_nwattr_changed) { | |
278 | info.attributes = old_nwattr; | |
279 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(old_inode), old_inode, NULL, DM_ATTRIBUTES, &info); | |
280 | /* ignore errors */ | |
281 | } | |
282 | if (new_nwattr_changed) { | |
283 | info.attributes = new_nwattr; | |
284 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(new_dir), new_dir, _new_name, DM_ATTRIBUTES, &info); | |
285 | /* ignore errors */ | |
286 | } | |
287 | return(res); | |
288 | } | |
289 | #endif /* CONFIG_NCPFS_STRONG */ | |
290 | ||
291 | ||
292 | static int | |
0b728e19 | 293 | ncp_lookup_validate(struct dentry *dentry, unsigned int flags) |
1da177e4 LT |
294 | { |
295 | struct ncp_server *server; | |
296 | struct dentry *parent; | |
297 | struct inode *dir; | |
298 | struct ncp_entry_info finfo; | |
299 | int res, val = 0, len; | |
300 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
301 | ||
0378c405 AV |
302 | if (dentry == dentry->d_sb->s_root) |
303 | return 1; | |
304 | ||
0b728e19 | 305 | if (flags & LOOKUP_RCU) |
34286d66 NP |
306 | return -ECHILD; |
307 | ||
1da177e4 LT |
308 | parent = dget_parent(dentry); |
309 | dir = parent->d_inode; | |
310 | ||
311 | if (!dentry->d_inode) | |
312 | goto finished; | |
313 | ||
314 | server = NCP_SERVER(dir); | |
315 | ||
1da177e4 LT |
316 | /* |
317 | * Inspired by smbfs: | |
318 | * The default validation is based on dentry age: | |
319 | * We set the max age at mount time. (But each | |
320 | * successful server lookup renews the timestamp.) | |
321 | */ | |
322 | val = NCP_TEST_AGE(server, dentry); | |
323 | if (val) | |
324 | goto finished; | |
325 | ||
326 | DDPRINTK("ncp_lookup_validate: %s/%s not valid, age=%ld, server lookup\n", | |
327 | dentry->d_parent->d_name.name, dentry->d_name.name, | |
328 | NCP_GET_AGE(dentry)); | |
329 | ||
330 | len = sizeof(__name); | |
331 | if (ncp_is_server_root(dir)) { | |
332 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
333 | dentry->d_name.len, 1); | |
2e54eb96 | 334 | if (!res) { |
1da177e4 | 335 | res = ncp_lookup_volume(server, __name, &(finfo.i)); |
2e54eb96 PV |
336 | if (!res) |
337 | ncp_update_known_namespace(server, finfo.i.volNumber, NULL); | |
338 | } | |
1da177e4 LT |
339 | } else { |
340 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
341 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
342 | if (!res) | |
343 | res = ncp_obtain_info(server, dir, __name, &(finfo.i)); | |
344 | } | |
345 | finfo.volume = finfo.i.volNumber; | |
346 | DDPRINTK("ncp_lookup_validate: looked for %s/%s, res=%d\n", | |
347 | dentry->d_parent->d_name.name, __name, res); | |
348 | /* | |
349 | * If we didn't find it, or if it has a different dirEntNum to | |
350 | * what we remember, it's not valid any more. | |
351 | */ | |
352 | if (!res) { | |
2e54eb96 PV |
353 | struct inode *inode = dentry->d_inode; |
354 | ||
355 | mutex_lock(&inode->i_mutex); | |
356 | if (finfo.i.dirEntNum == NCP_FINFO(inode)->dirEntNum) { | |
1da177e4 LT |
357 | ncp_new_dentry(dentry); |
358 | val=1; | |
359 | } else | |
360 | DDPRINTK("ncp_lookup_validate: found, but dirEntNum changed\n"); | |
361 | ||
2e54eb96 PV |
362 | ncp_update_inode2(inode, &finfo); |
363 | mutex_unlock(&inode->i_mutex); | |
1da177e4 LT |
364 | } |
365 | ||
366 | finished: | |
367 | DDPRINTK("ncp_lookup_validate: result=%d\n", val); | |
368 | dput(parent); | |
369 | return val; | |
370 | } | |
371 | ||
1da177e4 LT |
372 | static struct dentry * |
373 | ncp_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos) | |
374 | { | |
375 | struct dentry *dent = dentry; | |
376 | struct list_head *next; | |
377 | ||
378 | if (d_validate(dent, parent)) { | |
379 | if (dent->d_name.len <= NCP_MAXPATHLEN && | |
380 | (unsigned long)dent->d_fsdata == fpos) { | |
381 | if (!dent->d_inode) { | |
382 | dput(dent); | |
383 | dent = NULL; | |
384 | } | |
385 | return dent; | |
386 | } | |
387 | dput(dent); | |
388 | } | |
389 | ||
390 | /* If a pointer is invalid, we search the dentry. */ | |
2fd6b7f5 | 391 | spin_lock(&parent->d_lock); |
1da177e4 LT |
392 | next = parent->d_subdirs.next; |
393 | while (next != &parent->d_subdirs) { | |
5160ee6f | 394 | dent = list_entry(next, struct dentry, d_u.d_child); |
1da177e4 LT |
395 | if ((unsigned long)dent->d_fsdata == fpos) { |
396 | if (dent->d_inode) | |
dc0474be | 397 | dget(dent); |
1da177e4 LT |
398 | else |
399 | dent = NULL; | |
2fd6b7f5 | 400 | spin_unlock(&parent->d_lock); |
1da177e4 LT |
401 | goto out; |
402 | } | |
403 | next = next->next; | |
404 | } | |
2fd6b7f5 | 405 | spin_unlock(&parent->d_lock); |
1da177e4 LT |
406 | return NULL; |
407 | ||
408 | out: | |
409 | return dent; | |
410 | } | |
411 | ||
412 | static time_t ncp_obtain_mtime(struct dentry *dentry) | |
413 | { | |
414 | struct inode *inode = dentry->d_inode; | |
415 | struct ncp_server *server = NCP_SERVER(inode); | |
416 | struct nw_info_struct i; | |
417 | ||
418 | if (!ncp_conn_valid(server) || ncp_is_server_root(inode)) | |
419 | return 0; | |
420 | ||
421 | if (ncp_obtain_info(server, inode, NULL, &i)) | |
422 | return 0; | |
423 | ||
424 | return ncp_date_dos2unix(i.modifyTime, i.modifyDate); | |
425 | } | |
426 | ||
427 | static int ncp_readdir(struct file *filp, void *dirent, filldir_t filldir) | |
428 | { | |
92e5baef | 429 | struct dentry *dentry = filp->f_path.dentry; |
1da177e4 LT |
430 | struct inode *inode = dentry->d_inode; |
431 | struct page *page = NULL; | |
432 | struct ncp_server *server = NCP_SERVER(inode); | |
433 | union ncp_dir_cache *cache = NULL; | |
434 | struct ncp_cache_control ctl; | |
435 | int result, mtime_valid = 0; | |
436 | time_t mtime = 0; | |
437 | ||
1da177e4 LT |
438 | ctl.page = NULL; |
439 | ctl.cache = NULL; | |
440 | ||
441 | DDPRINTK("ncp_readdir: reading %s/%s, pos=%d\n", | |
442 | dentry->d_parent->d_name.name, dentry->d_name.name, | |
443 | (int) filp->f_pos); | |
444 | ||
445 | result = -EIO; | |
2e54eb96 | 446 | /* Do not generate '.' and '..' when server is dead. */ |
1da177e4 LT |
447 | if (!ncp_conn_valid(server)) |
448 | goto out; | |
449 | ||
450 | result = 0; | |
451 | if (filp->f_pos == 0) { | |
452 | if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR)) | |
453 | goto out; | |
454 | filp->f_pos = 1; | |
455 | } | |
456 | if (filp->f_pos == 1) { | |
457 | if (filldir(dirent, "..", 2, 1, parent_ino(dentry), DT_DIR)) | |
458 | goto out; | |
459 | filp->f_pos = 2; | |
460 | } | |
461 | ||
462 | page = grab_cache_page(&inode->i_data, 0); | |
463 | if (!page) | |
464 | goto read_really; | |
465 | ||
466 | ctl.cache = cache = kmap(page); | |
467 | ctl.head = cache->head; | |
468 | ||
469 | if (!PageUptodate(page) || !ctl.head.eof) | |
470 | goto init_cache; | |
471 | ||
472 | if (filp->f_pos == 2) { | |
473 | if (jiffies - ctl.head.time >= NCP_MAX_AGE(server)) | |
474 | goto init_cache; | |
475 | ||
476 | mtime = ncp_obtain_mtime(dentry); | |
477 | mtime_valid = 1; | |
478 | if ((!mtime) || (mtime != ctl.head.mtime)) | |
479 | goto init_cache; | |
480 | } | |
481 | ||
482 | if (filp->f_pos > ctl.head.end) | |
483 | goto finished; | |
484 | ||
485 | ctl.fpos = filp->f_pos + (NCP_DIRCACHE_START - 2); | |
486 | ctl.ofs = ctl.fpos / NCP_DIRCACHE_SIZE; | |
487 | ctl.idx = ctl.fpos % NCP_DIRCACHE_SIZE; | |
488 | ||
489 | for (;;) { | |
490 | if (ctl.ofs != 0) { | |
491 | ctl.page = find_lock_page(&inode->i_data, ctl.ofs); | |
492 | if (!ctl.page) | |
493 | goto invalid_cache; | |
494 | ctl.cache = kmap(ctl.page); | |
495 | if (!PageUptodate(ctl.page)) | |
496 | goto invalid_cache; | |
497 | } | |
498 | while (ctl.idx < NCP_DIRCACHE_SIZE) { | |
499 | struct dentry *dent; | |
500 | int res; | |
501 | ||
502 | dent = ncp_dget_fpos(ctl.cache->dentry[ctl.idx], | |
503 | dentry, filp->f_pos); | |
504 | if (!dent) | |
505 | goto invalid_cache; | |
506 | res = filldir(dirent, dent->d_name.name, | |
507 | dent->d_name.len, filp->f_pos, | |
508 | dent->d_inode->i_ino, DT_UNKNOWN); | |
509 | dput(dent); | |
510 | if (res) | |
511 | goto finished; | |
512 | filp->f_pos += 1; | |
513 | ctl.idx += 1; | |
514 | if (filp->f_pos > ctl.head.end) | |
515 | goto finished; | |
516 | } | |
517 | if (ctl.page) { | |
518 | kunmap(ctl.page); | |
519 | SetPageUptodate(ctl.page); | |
520 | unlock_page(ctl.page); | |
521 | page_cache_release(ctl.page); | |
522 | ctl.page = NULL; | |
523 | } | |
524 | ctl.idx = 0; | |
525 | ctl.ofs += 1; | |
526 | } | |
527 | invalid_cache: | |
528 | if (ctl.page) { | |
529 | kunmap(ctl.page); | |
530 | unlock_page(ctl.page); | |
531 | page_cache_release(ctl.page); | |
532 | ctl.page = NULL; | |
533 | } | |
534 | ctl.cache = cache; | |
535 | init_cache: | |
536 | ncp_invalidate_dircache_entries(dentry); | |
537 | if (!mtime_valid) { | |
538 | mtime = ncp_obtain_mtime(dentry); | |
539 | mtime_valid = 1; | |
540 | } | |
541 | ctl.head.mtime = mtime; | |
542 | ctl.head.time = jiffies; | |
543 | ctl.head.eof = 0; | |
544 | ctl.fpos = 2; | |
545 | ctl.ofs = 0; | |
546 | ctl.idx = NCP_DIRCACHE_START; | |
547 | ctl.filled = 0; | |
548 | ctl.valid = 1; | |
549 | read_really: | |
550 | if (ncp_is_server_root(inode)) { | |
551 | ncp_read_volume_list(filp, dirent, filldir, &ctl); | |
552 | } else { | |
553 | ncp_do_readdir(filp, dirent, filldir, &ctl); | |
554 | } | |
555 | ctl.head.end = ctl.fpos - 1; | |
556 | ctl.head.eof = ctl.valid; | |
557 | finished: | |
2e54eb96 PV |
558 | if (ctl.page) { |
559 | kunmap(ctl.page); | |
560 | SetPageUptodate(ctl.page); | |
561 | unlock_page(ctl.page); | |
562 | page_cache_release(ctl.page); | |
563 | } | |
1da177e4 LT |
564 | if (page) { |
565 | cache->head = ctl.head; | |
566 | kunmap(page); | |
567 | SetPageUptodate(page); | |
568 | unlock_page(page); | |
569 | page_cache_release(page); | |
570 | } | |
1da177e4 | 571 | out: |
1da177e4 LT |
572 | return result; |
573 | } | |
574 | ||
575 | static int | |
576 | ncp_fill_cache(struct file *filp, void *dirent, filldir_t filldir, | |
2e54eb96 PV |
577 | struct ncp_cache_control *ctrl, struct ncp_entry_info *entry, |
578 | int inval_childs) | |
1da177e4 | 579 | { |
92e5baef | 580 | struct dentry *newdent, *dentry = filp->f_path.dentry; |
2e54eb96 | 581 | struct inode *dir = dentry->d_inode; |
1da177e4 LT |
582 | struct ncp_cache_control ctl = *ctrl; |
583 | struct qstr qname; | |
584 | int valid = 0; | |
585 | int hashed = 0; | |
586 | ino_t ino = 0; | |
587 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
588 | ||
589 | qname.len = sizeof(__name); | |
2e54eb96 | 590 | if (ncp_vol2io(NCP_SERVER(dir), __name, &qname.len, |
1da177e4 | 591 | entry->i.entryName, entry->i.nameLen, |
2e54eb96 | 592 | !ncp_preserve_entry_case(dir, entry->i.NSCreator))) |
1da177e4 LT |
593 | return 1; /* I'm not sure */ |
594 | ||
595 | qname.name = __name; | |
1da177e4 | 596 | |
4f522a24 AV |
597 | newdent = d_hash_and_lookup(dentry, &qname); |
598 | if (unlikely(IS_ERR(newdent))) | |
599 | goto end_advance; | |
1da177e4 LT |
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 | /* | |
fb2d5b86 NP |
614 | * NetWare's OS2 namespace is case preserving yet case |
615 | * insensitive. So we update dentry's name as received from | |
616 | * server. Parent dir's i_mutex is locked because we're in | |
617 | * readdir. | |
2e54eb96 | 618 | */ |
fb2d5b86 | 619 | dentry_update_name_case(newdent, &qname); |
1da177e4 LT |
620 | } |
621 | ||
622 | if (!newdent->d_inode) { | |
2e54eb96 PV |
623 | struct inode *inode; |
624 | ||
1da177e4 | 625 | entry->opened = 0; |
2e54eb96 PV |
626 | entry->ino = iunique(dir->i_sb, 2); |
627 | inode = ncp_iget(dir->i_sb, entry); | |
628 | if (inode) { | |
2e54eb96 | 629 | d_instantiate(newdent, inode); |
1da177e4 LT |
630 | if (!hashed) |
631 | d_rehash(newdent); | |
632 | } | |
2e54eb96 PV |
633 | } else { |
634 | struct inode *inode = newdent->d_inode; | |
635 | ||
fb2d5b86 | 636 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD); |
2e54eb96 PV |
637 | ncp_update_inode2(inode, entry); |
638 | mutex_unlock(&inode->i_mutex); | |
639 | } | |
1da177e4 LT |
640 | |
641 | if (newdent->d_inode) { | |
642 | ino = newdent->d_inode->i_ino; | |
643 | newdent->d_fsdata = (void *) ctl.fpos; | |
644 | ncp_new_dentry(newdent); | |
645 | } | |
646 | ||
647 | if (ctl.idx >= NCP_DIRCACHE_SIZE) { | |
648 | if (ctl.page) { | |
649 | kunmap(ctl.page); | |
650 | SetPageUptodate(ctl.page); | |
651 | unlock_page(ctl.page); | |
652 | page_cache_release(ctl.page); | |
653 | } | |
654 | ctl.cache = NULL; | |
655 | ctl.idx -= NCP_DIRCACHE_SIZE; | |
656 | ctl.ofs += 1; | |
2e54eb96 | 657 | ctl.page = grab_cache_page(&dir->i_data, ctl.ofs); |
1da177e4 LT |
658 | if (ctl.page) |
659 | ctl.cache = kmap(ctl.page); | |
660 | } | |
661 | if (ctl.cache) { | |
662 | ctl.cache->dentry[ctl.idx] = newdent; | |
663 | valid = 1; | |
664 | } | |
665 | dput(newdent); | |
666 | end_advance: | |
667 | if (!valid) | |
668 | ctl.valid = 0; | |
669 | if (!ctl.filled && (ctl.fpos == filp->f_pos)) { | |
670 | if (!ino) | |
671 | ino = find_inode_number(dentry, &qname); | |
672 | if (!ino) | |
2e54eb96 | 673 | ino = iunique(dir->i_sb, 2); |
1da177e4 LT |
674 | ctl.filled = filldir(dirent, qname.name, qname.len, |
675 | filp->f_pos, ino, DT_UNKNOWN); | |
676 | if (!ctl.filled) | |
677 | filp->f_pos += 1; | |
678 | } | |
679 | ctl.fpos += 1; | |
680 | ctl.idx += 1; | |
681 | *ctrl = ctl; | |
682 | return (ctl.valid || !ctl.filled); | |
683 | } | |
684 | ||
685 | static void | |
686 | ncp_read_volume_list(struct file *filp, void *dirent, filldir_t filldir, | |
687 | struct ncp_cache_control *ctl) | |
688 | { | |
92e5baef | 689 | struct dentry *dentry = filp->f_path.dentry; |
1da177e4 LT |
690 | struct inode *inode = dentry->d_inode; |
691 | struct ncp_server *server = NCP_SERVER(inode); | |
692 | struct ncp_volume_info info; | |
693 | struct ncp_entry_info entry; | |
694 | int i; | |
695 | ||
696 | DPRINTK("ncp_read_volume_list: pos=%ld\n", | |
697 | (unsigned long) filp->f_pos); | |
698 | ||
699 | for (i = 0; i < NCP_NUMBER_OF_VOLUMES; i++) { | |
2e54eb96 | 700 | int inval_dentry; |
1da177e4 LT |
701 | |
702 | if (ncp_get_volume_info_with_number(server, i, &info) != 0) | |
703 | return; | |
704 | if (!strlen(info.volume_name)) | |
705 | continue; | |
706 | ||
707 | DPRINTK("ncp_read_volume_list: found vol: %s\n", | |
708 | info.volume_name); | |
709 | ||
710 | if (ncp_lookup_volume(server, info.volume_name, | |
711 | &entry.i)) { | |
712 | DPRINTK("ncpfs: could not lookup vol %s\n", | |
713 | info.volume_name); | |
714 | continue; | |
715 | } | |
2e54eb96 | 716 | inval_dentry = ncp_update_known_namespace(server, entry.i.volNumber, NULL); |
1da177e4 | 717 | entry.volume = entry.i.volNumber; |
2e54eb96 | 718 | if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry, inval_dentry)) |
1da177e4 LT |
719 | return; |
720 | } | |
721 | } | |
722 | ||
723 | static void | |
724 | ncp_do_readdir(struct file *filp, void *dirent, filldir_t filldir, | |
725 | struct ncp_cache_control *ctl) | |
726 | { | |
92e5baef | 727 | struct dentry *dentry = filp->f_path.dentry; |
1da177e4 LT |
728 | struct inode *dir = dentry->d_inode; |
729 | struct ncp_server *server = NCP_SERVER(dir); | |
730 | struct nw_search_sequence seq; | |
731 | struct ncp_entry_info entry; | |
732 | int err; | |
733 | void* buf; | |
734 | int more; | |
735 | size_t bufsize; | |
736 | ||
737 | DPRINTK("ncp_do_readdir: %s/%s, fpos=%ld\n", | |
738 | dentry->d_parent->d_name.name, dentry->d_name.name, | |
739 | (unsigned long) filp->f_pos); | |
740 | PPRINTK("ncp_do_readdir: init %s, volnum=%d, dirent=%u\n", | |
741 | dentry->d_name.name, NCP_FINFO(dir)->volNumber, | |
742 | NCP_FINFO(dir)->dirEntNum); | |
743 | ||
744 | err = ncp_initialize_search(server, dir, &seq); | |
745 | if (err) { | |
746 | DPRINTK("ncp_do_readdir: init failed, err=%d\n", err); | |
747 | return; | |
748 | } | |
1da177e4 LT |
749 | /* We MUST NOT use server->buffer_size handshaked with server if we are |
750 | using UDP, as for UDP server uses max. buffer size determined by | |
751 | MTU, and for TCP server uses hardwired value 65KB (== 66560 bytes). | |
752 | So we use 128KB, just to be sure, as there is no way how to know | |
753 | this value in advance. */ | |
754 | bufsize = 131072; | |
755 | buf = vmalloc(bufsize); | |
756 | if (!buf) | |
757 | return; | |
758 | do { | |
759 | int cnt; | |
760 | char* rpl; | |
761 | size_t rpls; | |
762 | ||
763 | err = ncp_search_for_fileset(server, &seq, &more, &cnt, buf, bufsize, &rpl, &rpls); | |
764 | if (err) /* Error */ | |
765 | break; | |
766 | if (!cnt) /* prevent endless loop */ | |
767 | break; | |
768 | while (cnt--) { | |
769 | size_t onerpl; | |
770 | ||
771 | if (rpls < offsetof(struct nw_info_struct, entryName)) | |
772 | break; /* short packet */ | |
773 | ncp_extract_file_info(rpl, &entry.i); | |
774 | onerpl = offsetof(struct nw_info_struct, entryName) + entry.i.nameLen; | |
775 | if (rpls < onerpl) | |
776 | break; /* short packet */ | |
777 | (void)ncp_obtain_nfs_info(server, &entry.i); | |
778 | rpl += onerpl; | |
779 | rpls -= onerpl; | |
780 | entry.volume = entry.i.volNumber; | |
2e54eb96 | 781 | if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry, 0)) |
1da177e4 LT |
782 | break; |
783 | } | |
784 | } while (more); | |
785 | vfree(buf); | |
1da177e4 LT |
786 | return; |
787 | } | |
788 | ||
789 | int ncp_conn_logged_in(struct super_block *sb) | |
790 | { | |
791 | struct ncp_server* server = NCP_SBP(sb); | |
792 | int result; | |
793 | ||
794 | if (ncp_single_volume(server)) { | |
795 | int len; | |
796 | struct dentry* dent; | |
797 | __u32 volNumber; | |
798 | __le32 dirEntNum; | |
799 | __le32 DosDirNum; | |
800 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
801 | ||
802 | len = sizeof(__name); | |
803 | result = ncp_io2vol(server, __name, &len, server->m.mounted_vol, | |
804 | strlen(server->m.mounted_vol), 1); | |
805 | if (result) | |
806 | goto out; | |
807 | result = -ENOENT; | |
808 | if (ncp_get_volume_root(server, __name, &volNumber, &dirEntNum, &DosDirNum)) { | |
809 | PPRINTK("ncp_conn_logged_in: %s not found\n", | |
810 | server->m.mounted_vol); | |
811 | goto out; | |
812 | } | |
813 | dent = sb->s_root; | |
814 | if (dent) { | |
815 | struct inode* ino = dent->d_inode; | |
816 | if (ino) { | |
2e54eb96 | 817 | ncp_update_known_namespace(server, volNumber, NULL); |
1da177e4 LT |
818 | NCP_FINFO(ino)->volNumber = volNumber; |
819 | NCP_FINFO(ino)->dirEntNum = dirEntNum; | |
820 | NCP_FINFO(ino)->DosDirNum = DosDirNum; | |
2e54eb96 | 821 | result = 0; |
1da177e4 LT |
822 | } else { |
823 | DPRINTK("ncpfs: sb->s_root->d_inode == NULL!\n"); | |
824 | } | |
825 | } else { | |
826 | DPRINTK("ncpfs: sb->s_root == NULL!\n"); | |
827 | } | |
2e54eb96 PV |
828 | } else |
829 | result = 0; | |
1da177e4 LT |
830 | |
831 | out: | |
832 | return result; | |
833 | } | |
834 | ||
00cd8dd3 | 835 | static struct dentry *ncp_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags) |
1da177e4 LT |
836 | { |
837 | struct ncp_server *server = NCP_SERVER(dir); | |
838 | struct inode *inode = NULL; | |
839 | struct ncp_entry_info finfo; | |
840 | int error, res, len; | |
841 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
842 | ||
1da177e4 LT |
843 | error = -EIO; |
844 | if (!ncp_conn_valid(server)) | |
845 | goto finished; | |
846 | ||
847 | PPRINTK("ncp_lookup: server lookup for %s/%s\n", | |
848 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
849 | ||
850 | len = sizeof(__name); | |
851 | if (ncp_is_server_root(dir)) { | |
852 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
853 | dentry->d_name.len, 1); | |
854 | if (!res) | |
855 | res = ncp_lookup_volume(server, __name, &(finfo.i)); | |
2e54eb96 PV |
856 | if (!res) |
857 | ncp_update_known_namespace(server, finfo.i.volNumber, NULL); | |
1da177e4 LT |
858 | } else { |
859 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
860 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
861 | if (!res) | |
862 | res = ncp_obtain_info(server, dir, __name, &(finfo.i)); | |
863 | } | |
864 | PPRINTK("ncp_lookup: looked for %s/%s, res=%d\n", | |
865 | dentry->d_parent->d_name.name, __name, res); | |
866 | /* | |
867 | * If we didn't find an entry, make a negative dentry. | |
868 | */ | |
869 | if (res) | |
870 | goto add_entry; | |
871 | ||
872 | /* | |
873 | * Create an inode for the entry. | |
874 | */ | |
875 | finfo.opened = 0; | |
876 | finfo.ino = iunique(dir->i_sb, 2); | |
877 | finfo.volume = finfo.i.volNumber; | |
878 | error = -EACCES; | |
879 | inode = ncp_iget(dir->i_sb, &finfo); | |
880 | ||
881 | if (inode) { | |
882 | ncp_new_dentry(dentry); | |
883 | add_entry: | |
1da177e4 LT |
884 | d_add(dentry, inode); |
885 | error = 0; | |
886 | } | |
887 | ||
888 | finished: | |
889 | PPRINTK("ncp_lookup: result=%d\n", error); | |
1da177e4 LT |
890 | return ERR_PTR(error); |
891 | } | |
892 | ||
893 | /* | |
894 | * This code is common to create, mkdir, and mknod. | |
895 | */ | |
896 | static int ncp_instantiate(struct inode *dir, struct dentry *dentry, | |
897 | struct ncp_entry_info *finfo) | |
898 | { | |
899 | struct inode *inode; | |
900 | int error = -EINVAL; | |
901 | ||
902 | finfo->ino = iunique(dir->i_sb, 2); | |
903 | inode = ncp_iget(dir->i_sb, finfo); | |
904 | if (!inode) | |
905 | goto out_close; | |
906 | d_instantiate(dentry,inode); | |
907 | error = 0; | |
908 | out: | |
909 | return error; | |
910 | ||
911 | out_close: | |
912 | PPRINTK("ncp_instantiate: %s/%s failed, closing file\n", | |
913 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
914 | ncp_close_file(NCP_SERVER(dir), finfo->file_handle); | |
915 | goto out; | |
916 | } | |
917 | ||
5eee25ca | 918 | int ncp_create_new(struct inode *dir, struct dentry *dentry, umode_t mode, |
1da177e4 LT |
919 | dev_t rdev, __le32 attributes) |
920 | { | |
921 | struct ncp_server *server = NCP_SERVER(dir); | |
922 | struct ncp_entry_info finfo; | |
923 | int error, result, len; | |
924 | int opmode; | |
925 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
926 | ||
5eee25ca | 927 | PPRINTK("ncp_create_new: creating %s/%s, mode=%hx\n", |
1da177e4 LT |
928 | dentry->d_parent->d_name.name, dentry->d_name.name, mode); |
929 | ||
1da177e4 LT |
930 | ncp_age_dentry(server, dentry); |
931 | len = sizeof(__name); | |
932 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
933 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
934 | if (error) | |
935 | goto out; | |
936 | ||
937 | error = -EACCES; | |
938 | ||
939 | if (S_ISREG(mode) && | |
940 | (server->m.flags & NCP_MOUNT_EXTRAS) && | |
941 | (mode & S_IXUGO)) | |
942 | attributes |= aSYSTEM | aSHARED; | |
943 | ||
944 | result = ncp_open_create_file_or_subdir(server, dir, __name, | |
945 | OC_MODE_CREATE | OC_MODE_OPEN | OC_MODE_REPLACE, | |
946 | attributes, AR_READ | AR_WRITE, &finfo); | |
947 | opmode = O_RDWR; | |
948 | if (result) { | |
949 | result = ncp_open_create_file_or_subdir(server, dir, __name, | |
950 | OC_MODE_CREATE | OC_MODE_OPEN | OC_MODE_REPLACE, | |
951 | attributes, AR_WRITE, &finfo); | |
952 | if (result) { | |
953 | if (result == 0x87) | |
954 | error = -ENAMETOOLONG; | |
2e54eb96 PV |
955 | else if (result < 0) |
956 | error = result; | |
1da177e4 LT |
957 | DPRINTK("ncp_create: %s/%s failed\n", |
958 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
959 | goto out; | |
960 | } | |
961 | opmode = O_WRONLY; | |
962 | } | |
963 | finfo.access = opmode; | |
964 | if (ncp_is_nfs_extras(server, finfo.volume)) { | |
965 | finfo.i.nfs.mode = mode; | |
966 | finfo.i.nfs.rdev = new_encode_dev(rdev); | |
967 | if (ncp_modify_nfs_info(server, finfo.volume, | |
968 | finfo.i.dirEntNum, | |
969 | mode, new_encode_dev(rdev)) != 0) | |
970 | goto out; | |
971 | } | |
972 | ||
973 | error = ncp_instantiate(dir, dentry, &finfo); | |
974 | out: | |
1da177e4 LT |
975 | return error; |
976 | } | |
977 | ||
4acdaf27 | 978 | static int ncp_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
ebfc3b49 | 979 | bool excl) |
1da177e4 LT |
980 | { |
981 | return ncp_create_new(dir, dentry, mode, 0, 0); | |
982 | } | |
983 | ||
18bb1db3 | 984 | static int ncp_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
1da177e4 LT |
985 | { |
986 | struct ncp_entry_info finfo; | |
987 | struct ncp_server *server = NCP_SERVER(dir); | |
988 | int error, len; | |
989 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
990 | ||
991 | DPRINTK("ncp_mkdir: making %s/%s\n", | |
992 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
993 | ||
1da177e4 LT |
994 | ncp_age_dentry(server, dentry); |
995 | len = sizeof(__name); | |
996 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
997 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
998 | if (error) | |
999 | goto out; | |
1000 | ||
2e54eb96 | 1001 | error = ncp_open_create_file_or_subdir(server, dir, __name, |
1da177e4 LT |
1002 | OC_MODE_CREATE, aDIR, |
1003 | cpu_to_le16(0xffff), | |
2e54eb96 PV |
1004 | &finfo); |
1005 | if (error == 0) { | |
1da177e4 LT |
1006 | if (ncp_is_nfs_extras(server, finfo.volume)) { |
1007 | mode |= S_IFDIR; | |
1008 | finfo.i.nfs.mode = mode; | |
1009 | if (ncp_modify_nfs_info(server, | |
1010 | finfo.volume, | |
1011 | finfo.i.dirEntNum, | |
1012 | mode, 0) != 0) | |
1013 | goto out; | |
1014 | } | |
1015 | error = ncp_instantiate(dir, dentry, &finfo); | |
2e54eb96 PV |
1016 | } else if (error > 0) { |
1017 | error = -EACCES; | |
1da177e4 LT |
1018 | } |
1019 | out: | |
1da177e4 LT |
1020 | return error; |
1021 | } | |
1022 | ||
1023 | static int ncp_rmdir(struct inode *dir, struct dentry *dentry) | |
1024 | { | |
1025 | struct ncp_server *server = NCP_SERVER(dir); | |
1026 | int error, result, len; | |
1027 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
1028 | ||
1029 | DPRINTK("ncp_rmdir: removing %s/%s\n", | |
1030 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
1031 | ||
7ce605d9 SW |
1032 | /* |
1033 | * fail with EBUSY if there are still references to this | |
1034 | * directory. | |
1035 | */ | |
79bf7c73 | 1036 | dentry_unhash(dentry); |
1da177e4 LT |
1037 | error = -EBUSY; |
1038 | if (!d_unhashed(dentry)) | |
1039 | goto out; | |
1040 | ||
1041 | len = sizeof(__name); | |
1042 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
1043 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
1044 | if (error) | |
1045 | goto out; | |
1046 | ||
1047 | result = ncp_del_file_or_subdir(server, dir, __name); | |
1048 | switch (result) { | |
1049 | case 0x00: | |
1050 | error = 0; | |
1051 | break; | |
1052 | case 0x85: /* unauthorized to delete file */ | |
1053 | case 0x8A: /* unauthorized to delete file */ | |
1054 | error = -EACCES; | |
1055 | break; | |
1056 | case 0x8F: | |
1057 | case 0x90: /* read only */ | |
1058 | error = -EPERM; | |
1059 | break; | |
1060 | case 0x9F: /* in use by another client */ | |
1061 | error = -EBUSY; | |
1062 | break; | |
1063 | case 0xA0: /* directory not empty */ | |
1064 | error = -ENOTEMPTY; | |
1065 | break; | |
1066 | case 0xFF: /* someone deleted file */ | |
1067 | error = -ENOENT; | |
1068 | break; | |
1069 | default: | |
2e54eb96 | 1070 | error = result < 0 ? result : -EACCES; |
1da177e4 LT |
1071 | break; |
1072 | } | |
1073 | out: | |
1da177e4 LT |
1074 | return error; |
1075 | } | |
1076 | ||
1077 | static int ncp_unlink(struct inode *dir, struct dentry *dentry) | |
1078 | { | |
1079 | struct inode *inode = dentry->d_inode; | |
1080 | struct ncp_server *server; | |
1081 | int error; | |
1082 | ||
1da177e4 LT |
1083 | server = NCP_SERVER(dir); |
1084 | DPRINTK("ncp_unlink: unlinking %s/%s\n", | |
1085 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
1086 | ||
1da177e4 LT |
1087 | /* |
1088 | * Check whether to close the file ... | |
1089 | */ | |
1090 | if (inode) { | |
1091 | PPRINTK("ncp_unlink: closing file\n"); | |
1092 | ncp_make_closed(inode); | |
1093 | } | |
1094 | ||
1095 | error = ncp_del_file_or_subdir2(server, dentry); | |
1096 | #ifdef CONFIG_NCPFS_STRONG | |
1097 | /* 9C is Invalid path.. It should be 8F, 90 - read only, but | |
1098 | it is not :-( */ | |
1099 | if ((error == 0x9C || error == 0x90) && server->m.flags & NCP_MOUNT_STRONG) { /* R/O */ | |
1100 | error = ncp_force_unlink(dir, dentry); | |
1101 | } | |
1102 | #endif | |
1103 | switch (error) { | |
1104 | case 0x00: | |
1105 | DPRINTK("ncp: removed %s/%s\n", | |
1106 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
1107 | break; | |
1108 | case 0x85: | |
1109 | case 0x8A: | |
1110 | error = -EACCES; | |
1111 | break; | |
1112 | case 0x8D: /* some files in use */ | |
1113 | case 0x8E: /* all files in use */ | |
1114 | error = -EBUSY; | |
1115 | break; | |
1116 | case 0x8F: /* some read only */ | |
1117 | case 0x90: /* all read only */ | |
1118 | case 0x9C: /* !!! returned when in-use or read-only by NW4 */ | |
1119 | error = -EPERM; | |
1120 | break; | |
1121 | case 0xFF: | |
1122 | error = -ENOENT; | |
1123 | break; | |
1124 | default: | |
2e54eb96 | 1125 | error = error < 0 ? error : -EACCES; |
1da177e4 LT |
1126 | break; |
1127 | } | |
1da177e4 LT |
1128 | return error; |
1129 | } | |
1130 | ||
1131 | static int ncp_rename(struct inode *old_dir, struct dentry *old_dentry, | |
1132 | struct inode *new_dir, struct dentry *new_dentry) | |
1133 | { | |
1134 | struct ncp_server *server = NCP_SERVER(old_dir); | |
1135 | int error; | |
1136 | int old_len, new_len; | |
1137 | __u8 __old_name[NCP_MAXPATHLEN + 1], __new_name[NCP_MAXPATHLEN + 1]; | |
1138 | ||
1139 | DPRINTK("ncp_rename: %s/%s to %s/%s\n", | |
1140 | old_dentry->d_parent->d_name.name, old_dentry->d_name.name, | |
1141 | new_dentry->d_parent->d_name.name, new_dentry->d_name.name); | |
1142 | ||
76cc071a SW |
1143 | if (new_dentry->d_inode && S_ISDIR(new_dentry->d_inode->i_mode)) { |
1144 | /* | |
1145 | * fail with EBUSY if there are still references to this | |
1146 | * directory. | |
1147 | */ | |
e4eaac06 | 1148 | dentry_unhash(new_dentry); |
76cc071a SW |
1149 | error = -EBUSY; |
1150 | if (!d_unhashed(new_dentry)) | |
1151 | goto out; | |
1152 | } | |
e4eaac06 | 1153 | |
1da177e4 LT |
1154 | ncp_age_dentry(server, old_dentry); |
1155 | ncp_age_dentry(server, new_dentry); | |
1156 | ||
1157 | old_len = sizeof(__old_name); | |
1158 | error = ncp_io2vol(server, __old_name, &old_len, | |
1159 | old_dentry->d_name.name, old_dentry->d_name.len, | |
1160 | !ncp_preserve_case(old_dir)); | |
1161 | if (error) | |
1162 | goto out; | |
1163 | ||
1164 | new_len = sizeof(__new_name); | |
1165 | error = ncp_io2vol(server, __new_name, &new_len, | |
1166 | new_dentry->d_name.name, new_dentry->d_name.len, | |
1167 | !ncp_preserve_case(new_dir)); | |
1168 | if (error) | |
1169 | goto out; | |
1170 | ||
1171 | error = ncp_ren_or_mov_file_or_subdir(server, old_dir, __old_name, | |
1172 | new_dir, __new_name); | |
1173 | #ifdef CONFIG_NCPFS_STRONG | |
1174 | if ((error == 0x90 || error == 0x8B || error == -EACCES) && | |
1175 | server->m.flags & NCP_MOUNT_STRONG) { /* RO */ | |
1176 | error = ncp_force_rename(old_dir, old_dentry, __old_name, | |
1177 | new_dir, new_dentry, __new_name); | |
1178 | } | |
1179 | #endif | |
1180 | switch (error) { | |
1181 | case 0x00: | |
1182 | DPRINTK("ncp renamed %s -> %s.\n", | |
1183 | old_dentry->d_name.name,new_dentry->d_name.name); | |
1184 | break; | |
1185 | case 0x9E: | |
1186 | error = -ENAMETOOLONG; | |
1187 | break; | |
1188 | case 0xFF: | |
1189 | error = -ENOENT; | |
1190 | break; | |
1191 | default: | |
2e54eb96 | 1192 | error = error < 0 ? error : -EACCES; |
1da177e4 LT |
1193 | break; |
1194 | } | |
1195 | out: | |
1da177e4 LT |
1196 | return error; |
1197 | } | |
1198 | ||
1199 | static int ncp_mknod(struct inode * dir, struct dentry *dentry, | |
1a67aafb | 1200 | umode_t mode, dev_t rdev) |
1da177e4 LT |
1201 | { |
1202 | if (!new_valid_dev(rdev)) | |
1203 | return -EINVAL; | |
1204 | if (ncp_is_nfs_extras(NCP_SERVER(dir), NCP_FINFO(dir)->volNumber)) { | |
1a67aafb | 1205 | DPRINTK(KERN_DEBUG "ncp_mknod: mode = 0%ho\n", mode); |
1da177e4 LT |
1206 | return ncp_create_new(dir, dentry, mode, rdev, 0); |
1207 | } | |
1208 | return -EPERM; /* Strange, but true */ | |
1209 | } | |
1210 | ||
1211 | /* The following routines are taken directly from msdos-fs */ | |
1212 | ||
1213 | /* Linear day numbers of the respective 1sts in non-leap years. */ | |
1214 | ||
1215 | static int day_n[] = | |
1216 | {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, 0}; | |
1217 | /* Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec */ | |
1218 | ||
1219 | ||
1220 | extern struct timezone sys_tz; | |
1221 | ||
1222 | static int utc2local(int time) | |
1223 | { | |
1224 | return time - sys_tz.tz_minuteswest * 60; | |
1225 | } | |
1226 | ||
1227 | static int local2utc(int time) | |
1228 | { | |
1229 | return time + sys_tz.tz_minuteswest * 60; | |
1230 | } | |
1231 | ||
1232 | /* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */ | |
1233 | int | |
1234 | ncp_date_dos2unix(__le16 t, __le16 d) | |
1235 | { | |
1236 | unsigned short time = le16_to_cpu(t), date = le16_to_cpu(d); | |
1237 | int month, year, secs; | |
1238 | ||
1239 | /* first subtract and mask after that... Otherwise, if | |
1240 | date == 0, bad things happen */ | |
1241 | month = ((date >> 5) - 1) & 15; | |
1242 | year = date >> 9; | |
1243 | secs = (time & 31) * 2 + 60 * ((time >> 5) & 63) + (time >> 11) * 3600 + | |
1244 | 86400 * ((date & 31) - 1 + day_n[month] + (year / 4) + | |
1245 | year * 365 - ((year & 3) == 0 && month < 2 ? 1 : 0) + 3653); | |
1246 | /* days since 1.1.70 plus 80's leap day */ | |
1247 | return local2utc(secs); | |
1248 | } | |
1249 | ||
1250 | ||
1251 | /* Convert linear UNIX date to a MS-DOS time/date pair. */ | |
1252 | void | |
1253 | ncp_date_unix2dos(int unix_date, __le16 *time, __le16 *date) | |
1254 | { | |
1255 | int day, year, nl_day, month; | |
1256 | ||
1257 | unix_date = utc2local(unix_date); | |
1258 | *time = cpu_to_le16( | |
1259 | (unix_date % 60) / 2 + (((unix_date / 60) % 60) << 5) + | |
1260 | (((unix_date / 3600) % 24) << 11)); | |
1261 | day = unix_date / 86400 - 3652; | |
1262 | year = day / 365; | |
1263 | if ((year + 3) / 4 + 365 * year > day) | |
1264 | year--; | |
1265 | day -= (year + 3) / 4 + 365 * year; | |
1266 | if (day == 59 && !(year & 3)) { | |
1267 | nl_day = day; | |
1268 | month = 2; | |
1269 | } else { | |
1270 | nl_day = (year & 3) || day <= 59 ? day : day - 1; | |
c5df5913 | 1271 | for (month = 1; month < 12; month++) |
1da177e4 LT |
1272 | if (day_n[month] > nl_day) |
1273 | break; | |
1274 | } | |
1275 | *date = cpu_to_le16(nl_day - day_n[month - 1] + 1 + (month << 5) + (year << 9)); | |
1276 | } |