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 | 25 | |
76f582a8 | 26 | static void ncp_read_volume_list(struct file *, struct dir_context *, |
1da177e4 | 27 | struct ncp_cache_control *); |
76f582a8 | 28 | static void ncp_do_readdir(struct file *, struct dir_context *, |
1da177e4 LT |
29 | struct ncp_cache_control *); |
30 | ||
76f582a8 | 31 | static int ncp_readdir(struct file *, struct dir_context *); |
1da177e4 | 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 | 51 | .read = generic_read_dir, |
76f582a8 | 52 | .iterate = 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); |
da53be12 LT |
76 | static int ncp_hash_dentry(const struct dentry *, struct qstr *); |
77 | static int ncp_compare_dentry(const struct dentry *, const struct dentry *, | |
621e155a | 78 | unsigned int, const char *, const struct qstr *); |
fe15ce44 | 79 | static int ncp_delete_dentry(const struct dentry *); |
1da177e4 | 80 | |
0378c405 | 81 | 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 | ||
2e54eb96 PV |
89 | #define ncp_namespace(i) (NCP_SERVER(i)->name_space[NCP_FINFO(i)->volNumber]) |
90 | ||
91 | static inline int ncp_preserve_entry_case(struct inode *i, __u32 nscreator) | |
92 | { | |
93 | #ifdef CONFIG_NCPFS_SMALLDOS | |
94 | int ns = ncp_namespace(i); | |
95 | ||
96 | if ((ns == NW_NS_DOS) | |
97 | #ifdef CONFIG_NCPFS_OS2_NS | |
98 | || ((ns == NW_NS_OS2) && (nscreator == NW_NS_DOS)) | |
99 | #endif /* CONFIG_NCPFS_OS2_NS */ | |
100 | ) | |
101 | return 0; | |
102 | #endif /* CONFIG_NCPFS_SMALLDOS */ | |
103 | return 1; | |
104 | } | |
105 | ||
106 | #define ncp_preserve_case(i) (ncp_namespace(i) != NW_NS_DOS) | |
107 | ||
621e155a | 108 | static inline int ncp_case_sensitive(const struct inode *i) |
2e54eb96 PV |
109 | { |
110 | #ifdef CONFIG_NCPFS_NFS_NS | |
621e155a | 111 | return ncp_namespace(i) == NW_NS_NFS; |
2e54eb96 PV |
112 | #else |
113 | return 0; | |
114 | #endif /* CONFIG_NCPFS_NFS_NS */ | |
115 | } | |
116 | ||
1da177e4 LT |
117 | /* |
118 | * Note: leave the hash unchanged if the directory | |
119 | * is case-sensitive. | |
da53be12 LT |
120 | * |
121 | * Accessing the parent inode can be racy under RCU pathwalking. | |
122 | * Use ACCESS_ONCE() to make sure we use _one_ particular inode, | |
123 | * the callers will handle races. | |
1da177e4 LT |
124 | */ |
125 | static int | |
da53be12 | 126 | ncp_hash_dentry(const struct dentry *dentry, struct qstr *this) |
1da177e4 | 127 | { |
da53be12 LT |
128 | struct inode *inode = ACCESS_ONCE(dentry->d_inode); |
129 | ||
130 | if (!inode) | |
131 | return 0; | |
132 | ||
b1e6a015 | 133 | if (!ncp_case_sensitive(inode)) { |
621e155a | 134 | struct super_block *sb = dentry->d_sb; |
2e54eb96 PV |
135 | struct nls_table *t; |
136 | unsigned long hash; | |
137 | int i; | |
1da177e4 | 138 | |
621e155a | 139 | t = NCP_IO_TABLE(sb); |
1da177e4 LT |
140 | hash = init_name_hash(); |
141 | for (i=0; i<this->len ; i++) | |
142 | hash = partial_name_hash(ncp_tolower(t, this->name[i]), | |
143 | hash); | |
144 | this->hash = end_name_hash(hash); | |
145 | } | |
146 | return 0; | |
147 | } | |
148 | ||
da53be12 LT |
149 | /* |
150 | * Accessing the parent inode can be racy under RCU pathwalking. | |
151 | * Use ACCESS_ONCE() to make sure we use _one_ particular inode, | |
152 | * the callers will handle races. | |
153 | */ | |
1da177e4 | 154 | static int |
da53be12 | 155 | ncp_compare_dentry(const struct dentry *parent, const struct dentry *dentry, |
621e155a | 156 | unsigned int len, const char *str, const struct qstr *name) |
1da177e4 | 157 | { |
da53be12 LT |
158 | struct inode *pinode; |
159 | ||
621e155a | 160 | if (len != name->len) |
1da177e4 LT |
161 | return 1; |
162 | ||
da53be12 LT |
163 | pinode = ACCESS_ONCE(parent->d_inode); |
164 | if (!pinode) | |
165 | return 1; | |
166 | ||
621e155a NP |
167 | if (ncp_case_sensitive(pinode)) |
168 | return strncmp(str, name->name, len); | |
1da177e4 | 169 | |
621e155a | 170 | return ncp_strnicmp(NCP_IO_TABLE(pinode->i_sb), str, name->name, len); |
1da177e4 LT |
171 | } |
172 | ||
173 | /* | |
174 | * This is the callback from dput() when d_count is going to 0. | |
175 | * We use this to unhash dentries with bad inodes. | |
176 | * Closing files can be safely postponed until iput() - it's done there anyway. | |
177 | */ | |
178 | static int | |
fe15ce44 | 179 | ncp_delete_dentry(const struct dentry * dentry) |
1da177e4 LT |
180 | { |
181 | struct inode *inode = dentry->d_inode; | |
182 | ||
183 | if (inode) { | |
184 | if (is_bad_inode(inode)) | |
185 | return 1; | |
186 | } else | |
187 | { | |
188 | /* N.B. Unhash negative dentries? */ | |
189 | } | |
190 | return 0; | |
191 | } | |
192 | ||
193 | static inline int | |
194 | ncp_single_volume(struct ncp_server *server) | |
195 | { | |
196 | return (server->m.mounted_vol[0] != '\0'); | |
197 | } | |
198 | ||
199 | static inline int ncp_is_server_root(struct inode *inode) | |
200 | { | |
201 | return (!ncp_single_volume(NCP_SERVER(inode)) && | |
202 | inode == inode->i_sb->s_root->d_inode); | |
203 | } | |
204 | ||
205 | ||
206 | /* | |
207 | * This is the callback when the dcache has a lookup hit. | |
208 | */ | |
209 | ||
210 | ||
211 | #ifdef CONFIG_NCPFS_STRONG | |
212 | /* try to delete a readonly file (NW R bit set) */ | |
213 | ||
214 | static int | |
215 | ncp_force_unlink(struct inode *dir, struct dentry* dentry) | |
216 | { | |
217 | int res=0x9c,res2; | |
218 | struct nw_modify_dos_info info; | |
219 | __le32 old_nwattr; | |
220 | struct inode *inode; | |
221 | ||
222 | memset(&info, 0, sizeof(info)); | |
223 | ||
224 | /* remove the Read-Only flag on the NW server */ | |
225 | inode = dentry->d_inode; | |
226 | ||
227 | old_nwattr = NCP_FINFO(inode)->nwattr; | |
228 | info.attributes = old_nwattr & ~(aRONLY|aDELETEINHIBIT|aRENAMEINHIBIT); | |
229 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(inode), inode, NULL, DM_ATTRIBUTES, &info); | |
230 | if (res2) | |
231 | goto leave_me; | |
232 | ||
233 | /* now try again the delete operation */ | |
234 | res = ncp_del_file_or_subdir2(NCP_SERVER(dir), dentry); | |
235 | ||
236 | if (res) /* delete failed, set R bit again */ | |
237 | { | |
238 | info.attributes = old_nwattr; | |
239 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(inode), inode, NULL, DM_ATTRIBUTES, &info); | |
240 | if (res2) | |
241 | goto leave_me; | |
242 | } | |
243 | leave_me: | |
244 | return(res); | |
245 | } | |
246 | #endif /* CONFIG_NCPFS_STRONG */ | |
247 | ||
248 | #ifdef CONFIG_NCPFS_STRONG | |
249 | static int | |
250 | ncp_force_rename(struct inode *old_dir, struct dentry* old_dentry, char *_old_name, | |
251 | struct inode *new_dir, struct dentry* new_dentry, char *_new_name) | |
252 | { | |
253 | struct nw_modify_dos_info info; | |
254 | int res=0x90,res2; | |
255 | struct inode *old_inode = old_dentry->d_inode; | |
256 | __le32 old_nwattr = NCP_FINFO(old_inode)->nwattr; | |
257 | __le32 new_nwattr = 0; /* shut compiler warning */ | |
258 | int old_nwattr_changed = 0; | |
259 | int new_nwattr_changed = 0; | |
260 | ||
261 | memset(&info, 0, sizeof(info)); | |
262 | ||
263 | /* remove the Read-Only flag on the NW server */ | |
264 | ||
265 | info.attributes = old_nwattr & ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT); | |
266 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(old_inode), old_inode, NULL, DM_ATTRIBUTES, &info); | |
267 | if (!res2) | |
268 | old_nwattr_changed = 1; | |
269 | if (new_dentry && new_dentry->d_inode) { | |
270 | new_nwattr = NCP_FINFO(new_dentry->d_inode)->nwattr; | |
271 | info.attributes = new_nwattr & ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT); | |
272 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(new_dir), new_dir, _new_name, DM_ATTRIBUTES, &info); | |
273 | if (!res2) | |
274 | new_nwattr_changed = 1; | |
275 | } | |
276 | /* now try again the rename operation */ | |
277 | /* but only if something really happened */ | |
278 | if (new_nwattr_changed || old_nwattr_changed) { | |
279 | res = ncp_ren_or_mov_file_or_subdir(NCP_SERVER(old_dir), | |
280 | old_dir, _old_name, | |
281 | new_dir, _new_name); | |
282 | } | |
283 | if (res) | |
284 | goto leave_me; | |
285 | /* file was successfully renamed, so: | |
286 | do not set attributes on old file - it no longer exists | |
287 | copy attributes from old file to new */ | |
288 | new_nwattr_changed = old_nwattr_changed; | |
289 | new_nwattr = old_nwattr; | |
290 | old_nwattr_changed = 0; | |
291 | ||
292 | leave_me:; | |
293 | if (old_nwattr_changed) { | |
294 | info.attributes = old_nwattr; | |
295 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(old_inode), old_inode, NULL, DM_ATTRIBUTES, &info); | |
296 | /* ignore errors */ | |
297 | } | |
298 | if (new_nwattr_changed) { | |
299 | info.attributes = new_nwattr; | |
300 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(new_dir), new_dir, _new_name, DM_ATTRIBUTES, &info); | |
301 | /* ignore errors */ | |
302 | } | |
303 | return(res); | |
304 | } | |
305 | #endif /* CONFIG_NCPFS_STRONG */ | |
306 | ||
307 | ||
308 | static int | |
0b728e19 | 309 | ncp_lookup_validate(struct dentry *dentry, unsigned int flags) |
1da177e4 LT |
310 | { |
311 | struct ncp_server *server; | |
312 | struct dentry *parent; | |
313 | struct inode *dir; | |
314 | struct ncp_entry_info finfo; | |
315 | int res, val = 0, len; | |
316 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
317 | ||
0378c405 AV |
318 | if (dentry == dentry->d_sb->s_root) |
319 | return 1; | |
320 | ||
0b728e19 | 321 | if (flags & LOOKUP_RCU) |
34286d66 NP |
322 | return -ECHILD; |
323 | ||
1da177e4 LT |
324 | parent = dget_parent(dentry); |
325 | dir = parent->d_inode; | |
326 | ||
327 | if (!dentry->d_inode) | |
328 | goto finished; | |
329 | ||
330 | server = NCP_SERVER(dir); | |
331 | ||
1da177e4 LT |
332 | /* |
333 | * Inspired by smbfs: | |
334 | * The default validation is based on dentry age: | |
335 | * We set the max age at mount time. (But each | |
336 | * successful server lookup renews the timestamp.) | |
337 | */ | |
338 | val = NCP_TEST_AGE(server, dentry); | |
339 | if (val) | |
340 | goto finished; | |
341 | ||
342 | DDPRINTK("ncp_lookup_validate: %s/%s not valid, age=%ld, server lookup\n", | |
343 | dentry->d_parent->d_name.name, dentry->d_name.name, | |
344 | NCP_GET_AGE(dentry)); | |
345 | ||
346 | len = sizeof(__name); | |
347 | if (ncp_is_server_root(dir)) { | |
348 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
349 | dentry->d_name.len, 1); | |
2e54eb96 | 350 | if (!res) { |
1da177e4 | 351 | res = ncp_lookup_volume(server, __name, &(finfo.i)); |
2e54eb96 PV |
352 | if (!res) |
353 | ncp_update_known_namespace(server, finfo.i.volNumber, NULL); | |
354 | } | |
1da177e4 LT |
355 | } else { |
356 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
357 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
358 | if (!res) | |
359 | res = ncp_obtain_info(server, dir, __name, &(finfo.i)); | |
360 | } | |
361 | finfo.volume = finfo.i.volNumber; | |
362 | DDPRINTK("ncp_lookup_validate: looked for %s/%s, res=%d\n", | |
363 | dentry->d_parent->d_name.name, __name, res); | |
364 | /* | |
365 | * If we didn't find it, or if it has a different dirEntNum to | |
366 | * what we remember, it's not valid any more. | |
367 | */ | |
368 | if (!res) { | |
2e54eb96 PV |
369 | struct inode *inode = dentry->d_inode; |
370 | ||
371 | mutex_lock(&inode->i_mutex); | |
372 | if (finfo.i.dirEntNum == NCP_FINFO(inode)->dirEntNum) { | |
1da177e4 LT |
373 | ncp_new_dentry(dentry); |
374 | val=1; | |
375 | } else | |
376 | DDPRINTK("ncp_lookup_validate: found, but dirEntNum changed\n"); | |
377 | ||
2e54eb96 PV |
378 | ncp_update_inode2(inode, &finfo); |
379 | mutex_unlock(&inode->i_mutex); | |
1da177e4 LT |
380 | } |
381 | ||
382 | finished: | |
383 | DDPRINTK("ncp_lookup_validate: result=%d\n", val); | |
384 | dput(parent); | |
385 | return val; | |
386 | } | |
387 | ||
1da177e4 LT |
388 | static struct dentry * |
389 | ncp_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos) | |
390 | { | |
391 | struct dentry *dent = dentry; | |
392 | struct list_head *next; | |
393 | ||
394 | if (d_validate(dent, parent)) { | |
395 | if (dent->d_name.len <= NCP_MAXPATHLEN && | |
396 | (unsigned long)dent->d_fsdata == fpos) { | |
397 | if (!dent->d_inode) { | |
398 | dput(dent); | |
399 | dent = NULL; | |
400 | } | |
401 | return dent; | |
402 | } | |
403 | dput(dent); | |
404 | } | |
405 | ||
406 | /* If a pointer is invalid, we search the dentry. */ | |
2fd6b7f5 | 407 | spin_lock(&parent->d_lock); |
1da177e4 LT |
408 | next = parent->d_subdirs.next; |
409 | while (next != &parent->d_subdirs) { | |
5160ee6f | 410 | dent = list_entry(next, struct dentry, d_u.d_child); |
1da177e4 LT |
411 | if ((unsigned long)dent->d_fsdata == fpos) { |
412 | if (dent->d_inode) | |
dc0474be | 413 | dget(dent); |
1da177e4 LT |
414 | else |
415 | dent = NULL; | |
2fd6b7f5 | 416 | spin_unlock(&parent->d_lock); |
1da177e4 LT |
417 | goto out; |
418 | } | |
419 | next = next->next; | |
420 | } | |
2fd6b7f5 | 421 | spin_unlock(&parent->d_lock); |
1da177e4 LT |
422 | return NULL; |
423 | ||
424 | out: | |
425 | return dent; | |
426 | } | |
427 | ||
428 | static time_t ncp_obtain_mtime(struct dentry *dentry) | |
429 | { | |
430 | struct inode *inode = dentry->d_inode; | |
431 | struct ncp_server *server = NCP_SERVER(inode); | |
432 | struct nw_info_struct i; | |
433 | ||
434 | if (!ncp_conn_valid(server) || ncp_is_server_root(inode)) | |
435 | return 0; | |
436 | ||
437 | if (ncp_obtain_info(server, inode, NULL, &i)) | |
438 | return 0; | |
439 | ||
440 | return ncp_date_dos2unix(i.modifyTime, i.modifyDate); | |
441 | } | |
442 | ||
76f582a8 | 443 | static int ncp_readdir(struct file *file, struct dir_context *ctx) |
1da177e4 | 444 | { |
76f582a8 | 445 | struct dentry *dentry = file->f_path.dentry; |
1da177e4 LT |
446 | struct inode *inode = dentry->d_inode; |
447 | struct page *page = NULL; | |
448 | struct ncp_server *server = NCP_SERVER(inode); | |
449 | union ncp_dir_cache *cache = NULL; | |
450 | struct ncp_cache_control ctl; | |
451 | int result, mtime_valid = 0; | |
452 | time_t mtime = 0; | |
453 | ||
1da177e4 LT |
454 | ctl.page = NULL; |
455 | ctl.cache = NULL; | |
456 | ||
457 | DDPRINTK("ncp_readdir: reading %s/%s, pos=%d\n", | |
458 | dentry->d_parent->d_name.name, dentry->d_name.name, | |
76f582a8 | 459 | (int) ctx->pos); |
1da177e4 LT |
460 | |
461 | result = -EIO; | |
2e54eb96 | 462 | /* Do not generate '.' and '..' when server is dead. */ |
1da177e4 LT |
463 | if (!ncp_conn_valid(server)) |
464 | goto out; | |
465 | ||
466 | result = 0; | |
76f582a8 AV |
467 | if (!dir_emit_dots(file, ctx)) |
468 | goto out; | |
1da177e4 LT |
469 | |
470 | page = grab_cache_page(&inode->i_data, 0); | |
471 | if (!page) | |
472 | goto read_really; | |
473 | ||
474 | ctl.cache = cache = kmap(page); | |
475 | ctl.head = cache->head; | |
476 | ||
477 | if (!PageUptodate(page) || !ctl.head.eof) | |
478 | goto init_cache; | |
479 | ||
76f582a8 | 480 | if (ctx->pos == 2) { |
1da177e4 LT |
481 | if (jiffies - ctl.head.time >= NCP_MAX_AGE(server)) |
482 | goto init_cache; | |
483 | ||
484 | mtime = ncp_obtain_mtime(dentry); | |
485 | mtime_valid = 1; | |
486 | if ((!mtime) || (mtime != ctl.head.mtime)) | |
487 | goto init_cache; | |
488 | } | |
489 | ||
76f582a8 | 490 | if (ctx->pos > ctl.head.end) |
1da177e4 LT |
491 | goto finished; |
492 | ||
76f582a8 | 493 | ctl.fpos = ctx->pos + (NCP_DIRCACHE_START - 2); |
1da177e4 LT |
494 | ctl.ofs = ctl.fpos / NCP_DIRCACHE_SIZE; |
495 | ctl.idx = ctl.fpos % NCP_DIRCACHE_SIZE; | |
496 | ||
497 | for (;;) { | |
498 | if (ctl.ofs != 0) { | |
499 | ctl.page = find_lock_page(&inode->i_data, ctl.ofs); | |
500 | if (!ctl.page) | |
501 | goto invalid_cache; | |
502 | ctl.cache = kmap(ctl.page); | |
503 | if (!PageUptodate(ctl.page)) | |
504 | goto invalid_cache; | |
505 | } | |
506 | while (ctl.idx < NCP_DIRCACHE_SIZE) { | |
507 | struct dentry *dent; | |
76f582a8 | 508 | bool over; |
1da177e4 LT |
509 | |
510 | dent = ncp_dget_fpos(ctl.cache->dentry[ctl.idx], | |
76f582a8 | 511 | dentry, ctx->pos); |
1da177e4 LT |
512 | if (!dent) |
513 | goto invalid_cache; | |
76f582a8 AV |
514 | over = !dir_emit(ctx, dent->d_name.name, |
515 | dent->d_name.len, | |
1da177e4 LT |
516 | dent->d_inode->i_ino, DT_UNKNOWN); |
517 | dput(dent); | |
76f582a8 | 518 | if (over) |
1da177e4 | 519 | goto finished; |
76f582a8 | 520 | ctx->pos += 1; |
1da177e4 | 521 | ctl.idx += 1; |
76f582a8 | 522 | if (ctx->pos > ctl.head.end) |
1da177e4 LT |
523 | goto finished; |
524 | } | |
525 | if (ctl.page) { | |
526 | kunmap(ctl.page); | |
527 | SetPageUptodate(ctl.page); | |
528 | unlock_page(ctl.page); | |
529 | page_cache_release(ctl.page); | |
530 | ctl.page = NULL; | |
531 | } | |
532 | ctl.idx = 0; | |
533 | ctl.ofs += 1; | |
534 | } | |
535 | invalid_cache: | |
536 | if (ctl.page) { | |
537 | kunmap(ctl.page); | |
538 | unlock_page(ctl.page); | |
539 | page_cache_release(ctl.page); | |
540 | ctl.page = NULL; | |
541 | } | |
542 | ctl.cache = cache; | |
543 | init_cache: | |
544 | ncp_invalidate_dircache_entries(dentry); | |
545 | if (!mtime_valid) { | |
546 | mtime = ncp_obtain_mtime(dentry); | |
547 | mtime_valid = 1; | |
548 | } | |
549 | ctl.head.mtime = mtime; | |
550 | ctl.head.time = jiffies; | |
551 | ctl.head.eof = 0; | |
552 | ctl.fpos = 2; | |
553 | ctl.ofs = 0; | |
554 | ctl.idx = NCP_DIRCACHE_START; | |
555 | ctl.filled = 0; | |
556 | ctl.valid = 1; | |
557 | read_really: | |
558 | if (ncp_is_server_root(inode)) { | |
76f582a8 | 559 | ncp_read_volume_list(file, ctx, &ctl); |
1da177e4 | 560 | } else { |
76f582a8 | 561 | ncp_do_readdir(file, ctx, &ctl); |
1da177e4 LT |
562 | } |
563 | ctl.head.end = ctl.fpos - 1; | |
564 | ctl.head.eof = ctl.valid; | |
565 | finished: | |
2e54eb96 PV |
566 | if (ctl.page) { |
567 | kunmap(ctl.page); | |
568 | SetPageUptodate(ctl.page); | |
569 | unlock_page(ctl.page); | |
570 | page_cache_release(ctl.page); | |
571 | } | |
1da177e4 LT |
572 | if (page) { |
573 | cache->head = ctl.head; | |
574 | kunmap(page); | |
575 | SetPageUptodate(page); | |
576 | unlock_page(page); | |
577 | page_cache_release(page); | |
578 | } | |
1da177e4 | 579 | out: |
1da177e4 LT |
580 | return result; |
581 | } | |
582 | ||
583 | static int | |
76f582a8 | 584 | ncp_fill_cache(struct file *file, struct dir_context *ctx, |
2e54eb96 PV |
585 | struct ncp_cache_control *ctrl, struct ncp_entry_info *entry, |
586 | int inval_childs) | |
1da177e4 | 587 | { |
76f582a8 | 588 | struct dentry *newdent, *dentry = file->f_path.dentry; |
2e54eb96 | 589 | struct inode *dir = dentry->d_inode; |
1da177e4 LT |
590 | struct ncp_cache_control ctl = *ctrl; |
591 | struct qstr qname; | |
592 | int valid = 0; | |
593 | int hashed = 0; | |
594 | ino_t ino = 0; | |
595 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
596 | ||
597 | qname.len = sizeof(__name); | |
2e54eb96 | 598 | if (ncp_vol2io(NCP_SERVER(dir), __name, &qname.len, |
1da177e4 | 599 | entry->i.entryName, entry->i.nameLen, |
2e54eb96 | 600 | !ncp_preserve_entry_case(dir, entry->i.NSCreator))) |
1da177e4 LT |
601 | return 1; /* I'm not sure */ |
602 | ||
603 | qname.name = __name; | |
1da177e4 | 604 | |
4f522a24 AV |
605 | newdent = d_hash_and_lookup(dentry, &qname); |
606 | if (unlikely(IS_ERR(newdent))) | |
607 | goto end_advance; | |
1da177e4 LT |
608 | if (!newdent) { |
609 | newdent = d_alloc(dentry, &qname); | |
610 | if (!newdent) | |
611 | goto end_advance; | |
612 | } else { | |
613 | hashed = 1; | |
2e54eb96 PV |
614 | |
615 | /* If case sensitivity changed for this volume, all entries below this one | |
616 | should be thrown away. This entry itself is not affected, as its case | |
617 | sensitivity is controlled by its own parent. */ | |
618 | if (inval_childs) | |
619 | shrink_dcache_parent(newdent); | |
620 | ||
621 | /* | |
fb2d5b86 NP |
622 | * NetWare's OS2 namespace is case preserving yet case |
623 | * insensitive. So we update dentry's name as received from | |
624 | * server. Parent dir's i_mutex is locked because we're in | |
625 | * readdir. | |
2e54eb96 | 626 | */ |
fb2d5b86 | 627 | dentry_update_name_case(newdent, &qname); |
1da177e4 LT |
628 | } |
629 | ||
630 | if (!newdent->d_inode) { | |
2e54eb96 PV |
631 | struct inode *inode; |
632 | ||
1da177e4 | 633 | entry->opened = 0; |
2e54eb96 PV |
634 | entry->ino = iunique(dir->i_sb, 2); |
635 | inode = ncp_iget(dir->i_sb, entry); | |
636 | if (inode) { | |
2e54eb96 | 637 | d_instantiate(newdent, inode); |
1da177e4 LT |
638 | if (!hashed) |
639 | d_rehash(newdent); | |
640 | } | |
2e54eb96 PV |
641 | } else { |
642 | struct inode *inode = newdent->d_inode; | |
643 | ||
fb2d5b86 | 644 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD); |
2e54eb96 PV |
645 | ncp_update_inode2(inode, entry); |
646 | mutex_unlock(&inode->i_mutex); | |
647 | } | |
1da177e4 LT |
648 | |
649 | if (newdent->d_inode) { | |
650 | ino = newdent->d_inode->i_ino; | |
651 | newdent->d_fsdata = (void *) ctl.fpos; | |
652 | ncp_new_dentry(newdent); | |
653 | } | |
654 | ||
655 | if (ctl.idx >= NCP_DIRCACHE_SIZE) { | |
656 | if (ctl.page) { | |
657 | kunmap(ctl.page); | |
658 | SetPageUptodate(ctl.page); | |
659 | unlock_page(ctl.page); | |
660 | page_cache_release(ctl.page); | |
661 | } | |
662 | ctl.cache = NULL; | |
663 | ctl.idx -= NCP_DIRCACHE_SIZE; | |
664 | ctl.ofs += 1; | |
2e54eb96 | 665 | ctl.page = grab_cache_page(&dir->i_data, ctl.ofs); |
1da177e4 LT |
666 | if (ctl.page) |
667 | ctl.cache = kmap(ctl.page); | |
668 | } | |
669 | if (ctl.cache) { | |
670 | ctl.cache->dentry[ctl.idx] = newdent; | |
671 | valid = 1; | |
672 | } | |
673 | dput(newdent); | |
674 | end_advance: | |
675 | if (!valid) | |
676 | ctl.valid = 0; | |
76f582a8 | 677 | if (!ctl.filled && (ctl.fpos == ctx->pos)) { |
1da177e4 | 678 | if (!ino) |
2e54eb96 | 679 | ino = iunique(dir->i_sb, 2); |
76f582a8 AV |
680 | ctl.filled = !dir_emit(ctx, qname.name, qname.len, |
681 | ino, DT_UNKNOWN); | |
1da177e4 | 682 | if (!ctl.filled) |
76f582a8 | 683 | ctx->pos += 1; |
1da177e4 LT |
684 | } |
685 | ctl.fpos += 1; | |
686 | ctl.idx += 1; | |
687 | *ctrl = ctl; | |
688 | return (ctl.valid || !ctl.filled); | |
689 | } | |
690 | ||
691 | static void | |
76f582a8 | 692 | ncp_read_volume_list(struct file *file, struct dir_context *ctx, |
1da177e4 LT |
693 | struct ncp_cache_control *ctl) |
694 | { | |
76f582a8 | 695 | struct dentry *dentry = file->f_path.dentry; |
1da177e4 LT |
696 | struct inode *inode = dentry->d_inode; |
697 | struct ncp_server *server = NCP_SERVER(inode); | |
698 | struct ncp_volume_info info; | |
699 | struct ncp_entry_info entry; | |
700 | int i; | |
701 | ||
702 | DPRINTK("ncp_read_volume_list: pos=%ld\n", | |
76f582a8 | 703 | (unsigned long) ctx->pos); |
1da177e4 LT |
704 | |
705 | for (i = 0; i < NCP_NUMBER_OF_VOLUMES; i++) { | |
2e54eb96 | 706 | int inval_dentry; |
1da177e4 LT |
707 | |
708 | if (ncp_get_volume_info_with_number(server, i, &info) != 0) | |
709 | return; | |
710 | if (!strlen(info.volume_name)) | |
711 | continue; | |
712 | ||
713 | DPRINTK("ncp_read_volume_list: found vol: %s\n", | |
714 | info.volume_name); | |
715 | ||
716 | if (ncp_lookup_volume(server, info.volume_name, | |
717 | &entry.i)) { | |
718 | DPRINTK("ncpfs: could not lookup vol %s\n", | |
719 | info.volume_name); | |
720 | continue; | |
721 | } | |
2e54eb96 | 722 | inval_dentry = ncp_update_known_namespace(server, entry.i.volNumber, NULL); |
1da177e4 | 723 | entry.volume = entry.i.volNumber; |
76f582a8 | 724 | if (!ncp_fill_cache(file, ctx, ctl, &entry, inval_dentry)) |
1da177e4 LT |
725 | return; |
726 | } | |
727 | } | |
728 | ||
729 | static void | |
76f582a8 | 730 | ncp_do_readdir(struct file *file, struct dir_context *ctx, |
1da177e4 LT |
731 | struct ncp_cache_control *ctl) |
732 | { | |
76f582a8 | 733 | struct dentry *dentry = file->f_path.dentry; |
1da177e4 LT |
734 | struct inode *dir = dentry->d_inode; |
735 | struct ncp_server *server = NCP_SERVER(dir); | |
736 | struct nw_search_sequence seq; | |
737 | struct ncp_entry_info entry; | |
738 | int err; | |
739 | void* buf; | |
740 | int more; | |
741 | size_t bufsize; | |
742 | ||
743 | DPRINTK("ncp_do_readdir: %s/%s, fpos=%ld\n", | |
744 | dentry->d_parent->d_name.name, dentry->d_name.name, | |
76f582a8 | 745 | (unsigned long) ctx->pos); |
1da177e4 LT |
746 | PPRINTK("ncp_do_readdir: init %s, volnum=%d, dirent=%u\n", |
747 | dentry->d_name.name, NCP_FINFO(dir)->volNumber, | |
748 | NCP_FINFO(dir)->dirEntNum); | |
749 | ||
750 | err = ncp_initialize_search(server, dir, &seq); | |
751 | if (err) { | |
752 | DPRINTK("ncp_do_readdir: init failed, err=%d\n", err); | |
753 | return; | |
754 | } | |
1da177e4 LT |
755 | /* We MUST NOT use server->buffer_size handshaked with server if we are |
756 | using UDP, as for UDP server uses max. buffer size determined by | |
757 | MTU, and for TCP server uses hardwired value 65KB (== 66560 bytes). | |
758 | So we use 128KB, just to be sure, as there is no way how to know | |
759 | this value in advance. */ | |
760 | bufsize = 131072; | |
761 | buf = vmalloc(bufsize); | |
762 | if (!buf) | |
763 | return; | |
764 | do { | |
765 | int cnt; | |
766 | char* rpl; | |
767 | size_t rpls; | |
768 | ||
769 | err = ncp_search_for_fileset(server, &seq, &more, &cnt, buf, bufsize, &rpl, &rpls); | |
770 | if (err) /* Error */ | |
771 | break; | |
772 | if (!cnt) /* prevent endless loop */ | |
773 | break; | |
774 | while (cnt--) { | |
775 | size_t onerpl; | |
776 | ||
777 | if (rpls < offsetof(struct nw_info_struct, entryName)) | |
778 | break; /* short packet */ | |
779 | ncp_extract_file_info(rpl, &entry.i); | |
780 | onerpl = offsetof(struct nw_info_struct, entryName) + entry.i.nameLen; | |
781 | if (rpls < onerpl) | |
782 | break; /* short packet */ | |
783 | (void)ncp_obtain_nfs_info(server, &entry.i); | |
784 | rpl += onerpl; | |
785 | rpls -= onerpl; | |
786 | entry.volume = entry.i.volNumber; | |
76f582a8 | 787 | if (!ncp_fill_cache(file, ctx, ctl, &entry, 0)) |
1da177e4 LT |
788 | break; |
789 | } | |
790 | } while (more); | |
791 | vfree(buf); | |
1da177e4 LT |
792 | return; |
793 | } | |
794 | ||
795 | int ncp_conn_logged_in(struct super_block *sb) | |
796 | { | |
797 | struct ncp_server* server = NCP_SBP(sb); | |
798 | int result; | |
799 | ||
800 | if (ncp_single_volume(server)) { | |
801 | int len; | |
802 | struct dentry* dent; | |
803 | __u32 volNumber; | |
804 | __le32 dirEntNum; | |
805 | __le32 DosDirNum; | |
806 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
807 | ||
808 | len = sizeof(__name); | |
809 | result = ncp_io2vol(server, __name, &len, server->m.mounted_vol, | |
810 | strlen(server->m.mounted_vol), 1); | |
811 | if (result) | |
812 | goto out; | |
813 | result = -ENOENT; | |
814 | if (ncp_get_volume_root(server, __name, &volNumber, &dirEntNum, &DosDirNum)) { | |
815 | PPRINTK("ncp_conn_logged_in: %s not found\n", | |
816 | server->m.mounted_vol); | |
817 | goto out; | |
818 | } | |
819 | dent = sb->s_root; | |
820 | if (dent) { | |
821 | struct inode* ino = dent->d_inode; | |
822 | if (ino) { | |
2e54eb96 | 823 | ncp_update_known_namespace(server, volNumber, NULL); |
1da177e4 LT |
824 | NCP_FINFO(ino)->volNumber = volNumber; |
825 | NCP_FINFO(ino)->dirEntNum = dirEntNum; | |
826 | NCP_FINFO(ino)->DosDirNum = DosDirNum; | |
2e54eb96 | 827 | result = 0; |
1da177e4 LT |
828 | } else { |
829 | DPRINTK("ncpfs: sb->s_root->d_inode == NULL!\n"); | |
830 | } | |
831 | } else { | |
832 | DPRINTK("ncpfs: sb->s_root == NULL!\n"); | |
833 | } | |
2e54eb96 PV |
834 | } else |
835 | result = 0; | |
1da177e4 LT |
836 | |
837 | out: | |
838 | return result; | |
839 | } | |
840 | ||
00cd8dd3 | 841 | static struct dentry *ncp_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags) |
1da177e4 LT |
842 | { |
843 | struct ncp_server *server = NCP_SERVER(dir); | |
844 | struct inode *inode = NULL; | |
845 | struct ncp_entry_info finfo; | |
846 | int error, res, len; | |
847 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
848 | ||
1da177e4 LT |
849 | error = -EIO; |
850 | if (!ncp_conn_valid(server)) | |
851 | goto finished; | |
852 | ||
853 | PPRINTK("ncp_lookup: server lookup for %s/%s\n", | |
854 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
855 | ||
856 | len = sizeof(__name); | |
857 | if (ncp_is_server_root(dir)) { | |
858 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
859 | dentry->d_name.len, 1); | |
860 | if (!res) | |
861 | res = ncp_lookup_volume(server, __name, &(finfo.i)); | |
2e54eb96 PV |
862 | if (!res) |
863 | ncp_update_known_namespace(server, finfo.i.volNumber, NULL); | |
1da177e4 LT |
864 | } else { |
865 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
866 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
867 | if (!res) | |
868 | res = ncp_obtain_info(server, dir, __name, &(finfo.i)); | |
869 | } | |
870 | PPRINTK("ncp_lookup: looked for %s/%s, res=%d\n", | |
871 | dentry->d_parent->d_name.name, __name, res); | |
872 | /* | |
873 | * If we didn't find an entry, make a negative dentry. | |
874 | */ | |
875 | if (res) | |
876 | goto add_entry; | |
877 | ||
878 | /* | |
879 | * Create an inode for the entry. | |
880 | */ | |
881 | finfo.opened = 0; | |
882 | finfo.ino = iunique(dir->i_sb, 2); | |
883 | finfo.volume = finfo.i.volNumber; | |
884 | error = -EACCES; | |
885 | inode = ncp_iget(dir->i_sb, &finfo); | |
886 | ||
887 | if (inode) { | |
888 | ncp_new_dentry(dentry); | |
889 | add_entry: | |
1da177e4 LT |
890 | d_add(dentry, inode); |
891 | error = 0; | |
892 | } | |
893 | ||
894 | finished: | |
895 | PPRINTK("ncp_lookup: result=%d\n", error); | |
1da177e4 LT |
896 | return ERR_PTR(error); |
897 | } | |
898 | ||
899 | /* | |
900 | * This code is common to create, mkdir, and mknod. | |
901 | */ | |
902 | static int ncp_instantiate(struct inode *dir, struct dentry *dentry, | |
903 | struct ncp_entry_info *finfo) | |
904 | { | |
905 | struct inode *inode; | |
906 | int error = -EINVAL; | |
907 | ||
908 | finfo->ino = iunique(dir->i_sb, 2); | |
909 | inode = ncp_iget(dir->i_sb, finfo); | |
910 | if (!inode) | |
911 | goto out_close; | |
912 | d_instantiate(dentry,inode); | |
913 | error = 0; | |
914 | out: | |
915 | return error; | |
916 | ||
917 | out_close: | |
918 | PPRINTK("ncp_instantiate: %s/%s failed, closing file\n", | |
919 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
920 | ncp_close_file(NCP_SERVER(dir), finfo->file_handle); | |
921 | goto out; | |
922 | } | |
923 | ||
5eee25ca | 924 | int ncp_create_new(struct inode *dir, struct dentry *dentry, umode_t mode, |
1da177e4 LT |
925 | dev_t rdev, __le32 attributes) |
926 | { | |
927 | struct ncp_server *server = NCP_SERVER(dir); | |
928 | struct ncp_entry_info finfo; | |
929 | int error, result, len; | |
930 | int opmode; | |
931 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
932 | ||
5eee25ca | 933 | PPRINTK("ncp_create_new: creating %s/%s, mode=%hx\n", |
1da177e4 LT |
934 | dentry->d_parent->d_name.name, dentry->d_name.name, mode); |
935 | ||
1da177e4 LT |
936 | ncp_age_dentry(server, dentry); |
937 | len = sizeof(__name); | |
938 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
939 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
940 | if (error) | |
941 | goto out; | |
942 | ||
943 | error = -EACCES; | |
944 | ||
945 | if (S_ISREG(mode) && | |
946 | (server->m.flags & NCP_MOUNT_EXTRAS) && | |
947 | (mode & S_IXUGO)) | |
948 | attributes |= aSYSTEM | aSHARED; | |
949 | ||
950 | result = ncp_open_create_file_or_subdir(server, dir, __name, | |
951 | OC_MODE_CREATE | OC_MODE_OPEN | OC_MODE_REPLACE, | |
952 | attributes, AR_READ | AR_WRITE, &finfo); | |
953 | opmode = O_RDWR; | |
954 | if (result) { | |
955 | result = ncp_open_create_file_or_subdir(server, dir, __name, | |
956 | OC_MODE_CREATE | OC_MODE_OPEN | OC_MODE_REPLACE, | |
957 | attributes, AR_WRITE, &finfo); | |
958 | if (result) { | |
959 | if (result == 0x87) | |
960 | error = -ENAMETOOLONG; | |
2e54eb96 PV |
961 | else if (result < 0) |
962 | error = result; | |
1da177e4 LT |
963 | DPRINTK("ncp_create: %s/%s failed\n", |
964 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
965 | goto out; | |
966 | } | |
967 | opmode = O_WRONLY; | |
968 | } | |
969 | finfo.access = opmode; | |
970 | if (ncp_is_nfs_extras(server, finfo.volume)) { | |
971 | finfo.i.nfs.mode = mode; | |
972 | finfo.i.nfs.rdev = new_encode_dev(rdev); | |
973 | if (ncp_modify_nfs_info(server, finfo.volume, | |
974 | finfo.i.dirEntNum, | |
975 | mode, new_encode_dev(rdev)) != 0) | |
976 | goto out; | |
977 | } | |
978 | ||
979 | error = ncp_instantiate(dir, dentry, &finfo); | |
980 | out: | |
1da177e4 LT |
981 | return error; |
982 | } | |
983 | ||
4acdaf27 | 984 | static int ncp_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
ebfc3b49 | 985 | bool excl) |
1da177e4 LT |
986 | { |
987 | return ncp_create_new(dir, dentry, mode, 0, 0); | |
988 | } | |
989 | ||
18bb1db3 | 990 | static int ncp_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
1da177e4 LT |
991 | { |
992 | struct ncp_entry_info finfo; | |
993 | struct ncp_server *server = NCP_SERVER(dir); | |
994 | int error, len; | |
995 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
996 | ||
997 | DPRINTK("ncp_mkdir: making %s/%s\n", | |
998 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
999 | ||
1da177e4 LT |
1000 | ncp_age_dentry(server, dentry); |
1001 | len = sizeof(__name); | |
1002 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
1003 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
1004 | if (error) | |
1005 | goto out; | |
1006 | ||
2e54eb96 | 1007 | error = ncp_open_create_file_or_subdir(server, dir, __name, |
1da177e4 LT |
1008 | OC_MODE_CREATE, aDIR, |
1009 | cpu_to_le16(0xffff), | |
2e54eb96 PV |
1010 | &finfo); |
1011 | if (error == 0) { | |
1da177e4 LT |
1012 | if (ncp_is_nfs_extras(server, finfo.volume)) { |
1013 | mode |= S_IFDIR; | |
1014 | finfo.i.nfs.mode = mode; | |
1015 | if (ncp_modify_nfs_info(server, | |
1016 | finfo.volume, | |
1017 | finfo.i.dirEntNum, | |
1018 | mode, 0) != 0) | |
1019 | goto out; | |
1020 | } | |
1021 | error = ncp_instantiate(dir, dentry, &finfo); | |
2e54eb96 PV |
1022 | } else if (error > 0) { |
1023 | error = -EACCES; | |
1da177e4 LT |
1024 | } |
1025 | out: | |
1da177e4 LT |
1026 | return error; |
1027 | } | |
1028 | ||
1029 | static int ncp_rmdir(struct inode *dir, struct dentry *dentry) | |
1030 | { | |
1031 | struct ncp_server *server = NCP_SERVER(dir); | |
1032 | int error, result, len; | |
1033 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
1034 | ||
1035 | DPRINTK("ncp_rmdir: removing %s/%s\n", | |
1036 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
1037 | ||
1da177e4 LT |
1038 | len = sizeof(__name); |
1039 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
1040 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
1041 | if (error) | |
1042 | goto out; | |
1043 | ||
1044 | result = ncp_del_file_or_subdir(server, dir, __name); | |
1045 | switch (result) { | |
1046 | case 0x00: | |
1047 | error = 0; | |
1048 | break; | |
1049 | case 0x85: /* unauthorized to delete file */ | |
1050 | case 0x8A: /* unauthorized to delete file */ | |
1051 | error = -EACCES; | |
1052 | break; | |
1053 | case 0x8F: | |
1054 | case 0x90: /* read only */ | |
1055 | error = -EPERM; | |
1056 | break; | |
1057 | case 0x9F: /* in use by another client */ | |
1058 | error = -EBUSY; | |
1059 | break; | |
1060 | case 0xA0: /* directory not empty */ | |
1061 | error = -ENOTEMPTY; | |
1062 | break; | |
1063 | case 0xFF: /* someone deleted file */ | |
1064 | error = -ENOENT; | |
1065 | break; | |
1066 | default: | |
2e54eb96 | 1067 | error = result < 0 ? result : -EACCES; |
1da177e4 LT |
1068 | break; |
1069 | } | |
1070 | out: | |
1da177e4 LT |
1071 | return error; |
1072 | } | |
1073 | ||
1074 | static int ncp_unlink(struct inode *dir, struct dentry *dentry) | |
1075 | { | |
1076 | struct inode *inode = dentry->d_inode; | |
1077 | struct ncp_server *server; | |
1078 | int error; | |
1079 | ||
1da177e4 LT |
1080 | server = NCP_SERVER(dir); |
1081 | DPRINTK("ncp_unlink: unlinking %s/%s\n", | |
1082 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
1083 | ||
1da177e4 LT |
1084 | /* |
1085 | * Check whether to close the file ... | |
1086 | */ | |
1087 | if (inode) { | |
1088 | PPRINTK("ncp_unlink: closing file\n"); | |
1089 | ncp_make_closed(inode); | |
1090 | } | |
1091 | ||
1092 | error = ncp_del_file_or_subdir2(server, dentry); | |
1093 | #ifdef CONFIG_NCPFS_STRONG | |
1094 | /* 9C is Invalid path.. It should be 8F, 90 - read only, but | |
1095 | it is not :-( */ | |
1096 | if ((error == 0x9C || error == 0x90) && server->m.flags & NCP_MOUNT_STRONG) { /* R/O */ | |
1097 | error = ncp_force_unlink(dir, dentry); | |
1098 | } | |
1099 | #endif | |
1100 | switch (error) { | |
1101 | case 0x00: | |
1102 | DPRINTK("ncp: removed %s/%s\n", | |
1103 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
1104 | break; | |
1105 | case 0x85: | |
1106 | case 0x8A: | |
1107 | error = -EACCES; | |
1108 | break; | |
1109 | case 0x8D: /* some files in use */ | |
1110 | case 0x8E: /* all files in use */ | |
1111 | error = -EBUSY; | |
1112 | break; | |
1113 | case 0x8F: /* some read only */ | |
1114 | case 0x90: /* all read only */ | |
1115 | case 0x9C: /* !!! returned when in-use or read-only by NW4 */ | |
1116 | error = -EPERM; | |
1117 | break; | |
1118 | case 0xFF: | |
1119 | error = -ENOENT; | |
1120 | break; | |
1121 | default: | |
2e54eb96 | 1122 | error = error < 0 ? error : -EACCES; |
1da177e4 LT |
1123 | break; |
1124 | } | |
1da177e4 LT |
1125 | return error; |
1126 | } | |
1127 | ||
1128 | static int ncp_rename(struct inode *old_dir, struct dentry *old_dentry, | |
1129 | struct inode *new_dir, struct dentry *new_dentry) | |
1130 | { | |
1131 | struct ncp_server *server = NCP_SERVER(old_dir); | |
1132 | int error; | |
1133 | int old_len, new_len; | |
1134 | __u8 __old_name[NCP_MAXPATHLEN + 1], __new_name[NCP_MAXPATHLEN + 1]; | |
1135 | ||
1136 | DPRINTK("ncp_rename: %s/%s to %s/%s\n", | |
1137 | old_dentry->d_parent->d_name.name, old_dentry->d_name.name, | |
1138 | new_dentry->d_parent->d_name.name, new_dentry->d_name.name); | |
1139 | ||
1da177e4 LT |
1140 | ncp_age_dentry(server, old_dentry); |
1141 | ncp_age_dentry(server, new_dentry); | |
1142 | ||
1143 | old_len = sizeof(__old_name); | |
1144 | error = ncp_io2vol(server, __old_name, &old_len, | |
1145 | old_dentry->d_name.name, old_dentry->d_name.len, | |
1146 | !ncp_preserve_case(old_dir)); | |
1147 | if (error) | |
1148 | goto out; | |
1149 | ||
1150 | new_len = sizeof(__new_name); | |
1151 | error = ncp_io2vol(server, __new_name, &new_len, | |
1152 | new_dentry->d_name.name, new_dentry->d_name.len, | |
1153 | !ncp_preserve_case(new_dir)); | |
1154 | if (error) | |
1155 | goto out; | |
1156 | ||
1157 | error = ncp_ren_or_mov_file_or_subdir(server, old_dir, __old_name, | |
1158 | new_dir, __new_name); | |
1159 | #ifdef CONFIG_NCPFS_STRONG | |
1160 | if ((error == 0x90 || error == 0x8B || error == -EACCES) && | |
1161 | server->m.flags & NCP_MOUNT_STRONG) { /* RO */ | |
1162 | error = ncp_force_rename(old_dir, old_dentry, __old_name, | |
1163 | new_dir, new_dentry, __new_name); | |
1164 | } | |
1165 | #endif | |
1166 | switch (error) { | |
1167 | case 0x00: | |
1168 | DPRINTK("ncp renamed %s -> %s.\n", | |
1169 | old_dentry->d_name.name,new_dentry->d_name.name); | |
1170 | break; | |
1171 | case 0x9E: | |
1172 | error = -ENAMETOOLONG; | |
1173 | break; | |
1174 | case 0xFF: | |
1175 | error = -ENOENT; | |
1176 | break; | |
1177 | default: | |
2e54eb96 | 1178 | error = error < 0 ? error : -EACCES; |
1da177e4 LT |
1179 | break; |
1180 | } | |
1181 | out: | |
1da177e4 LT |
1182 | return error; |
1183 | } | |
1184 | ||
1185 | static int ncp_mknod(struct inode * dir, struct dentry *dentry, | |
1a67aafb | 1186 | umode_t mode, dev_t rdev) |
1da177e4 LT |
1187 | { |
1188 | if (!new_valid_dev(rdev)) | |
1189 | return -EINVAL; | |
1190 | if (ncp_is_nfs_extras(NCP_SERVER(dir), NCP_FINFO(dir)->volNumber)) { | |
1a67aafb | 1191 | DPRINTK(KERN_DEBUG "ncp_mknod: mode = 0%ho\n", mode); |
1da177e4 LT |
1192 | return ncp_create_new(dir, dentry, mode, rdev, 0); |
1193 | } | |
1194 | return -EPERM; /* Strange, but true */ | |
1195 | } | |
1196 | ||
1197 | /* The following routines are taken directly from msdos-fs */ | |
1198 | ||
1199 | /* Linear day numbers of the respective 1sts in non-leap years. */ | |
1200 | ||
1201 | static int day_n[] = | |
1202 | {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, 0}; | |
1203 | /* Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec */ | |
1204 | ||
1205 | ||
1206 | extern struct timezone sys_tz; | |
1207 | ||
1208 | static int utc2local(int time) | |
1209 | { | |
1210 | return time - sys_tz.tz_minuteswest * 60; | |
1211 | } | |
1212 | ||
1213 | static int local2utc(int time) | |
1214 | { | |
1215 | return time + sys_tz.tz_minuteswest * 60; | |
1216 | } | |
1217 | ||
1218 | /* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */ | |
1219 | int | |
1220 | ncp_date_dos2unix(__le16 t, __le16 d) | |
1221 | { | |
1222 | unsigned short time = le16_to_cpu(t), date = le16_to_cpu(d); | |
1223 | int month, year, secs; | |
1224 | ||
1225 | /* first subtract and mask after that... Otherwise, if | |
1226 | date == 0, bad things happen */ | |
1227 | month = ((date >> 5) - 1) & 15; | |
1228 | year = date >> 9; | |
1229 | secs = (time & 31) * 2 + 60 * ((time >> 5) & 63) + (time >> 11) * 3600 + | |
1230 | 86400 * ((date & 31) - 1 + day_n[month] + (year / 4) + | |
1231 | year * 365 - ((year & 3) == 0 && month < 2 ? 1 : 0) + 3653); | |
1232 | /* days since 1.1.70 plus 80's leap day */ | |
1233 | return local2utc(secs); | |
1234 | } | |
1235 | ||
1236 | ||
1237 | /* Convert linear UNIX date to a MS-DOS time/date pair. */ | |
1238 | void | |
1239 | ncp_date_unix2dos(int unix_date, __le16 *time, __le16 *date) | |
1240 | { | |
1241 | int day, year, nl_day, month; | |
1242 | ||
1243 | unix_date = utc2local(unix_date); | |
1244 | *time = cpu_to_le16( | |
1245 | (unix_date % 60) / 2 + (((unix_date / 60) % 60) << 5) + | |
1246 | (((unix_date / 3600) % 24) << 11)); | |
1247 | day = unix_date / 86400 - 3652; | |
1248 | year = day / 365; | |
1249 | if ((year + 3) / 4 + 365 * year > day) | |
1250 | year--; | |
1251 | day -= (year + 3) / 4 + 365 * year; | |
1252 | if (day == 59 && !(year & 3)) { | |
1253 | nl_day = day; | |
1254 | month = 2; | |
1255 | } else { | |
1256 | nl_day = (year & 3) || day <= 59 ? day : day - 1; | |
c5df5913 | 1257 | for (month = 1; month < 12; month++) |
1da177e4 LT |
1258 | if (day_n[month] > nl_day) |
1259 | break; | |
1260 | } | |
1261 | *date = cpu_to_le16(nl_day - day_n[month - 1] + 1 + (month << 5) + (year << 9)); | |
1262 | } |