| 1 | /* |
| 2 | * dir.c |
| 3 | * |
| 4 | * Copyright (C) 1995, 1996 by Volker Lendecke |
| 5 | * Modified for big endian by J.F. Chadima and David S. Miller |
| 6 | * Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache |
| 7 | * Modified 1998, 1999 Wolfram Pienkoss for NLS |
| 8 | * Modified 1999 Wolfram Pienkoss for directory caching |
| 9 | * Modified 2000 Ben Harris, University of Cambridge for NFS NS meta-info |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | |
| 14 | #include <linux/time.h> |
| 15 | #include <linux/errno.h> |
| 16 | #include <linux/stat.h> |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/slab.h> |
| 19 | #include <linux/vmalloc.h> |
| 20 | #include <linux/mm.h> |
| 21 | #include <asm/uaccess.h> |
| 22 | #include <asm/byteorder.h> |
| 23 | #include <linux/smp_lock.h> |
| 24 | |
| 25 | #include <linux/ncp_fs.h> |
| 26 | |
| 27 | #include "ncplib_kernel.h" |
| 28 | |
| 29 | static void ncp_read_volume_list(struct file *, void *, filldir_t, |
| 30 | struct ncp_cache_control *); |
| 31 | static void ncp_do_readdir(struct file *, void *, filldir_t, |
| 32 | struct ncp_cache_control *); |
| 33 | |
| 34 | static int ncp_readdir(struct file *, void *, filldir_t); |
| 35 | |
| 36 | static int ncp_create(struct inode *, struct dentry *, int, struct nameidata *); |
| 37 | static struct dentry *ncp_lookup(struct inode *, struct dentry *, struct nameidata *); |
| 38 | static int ncp_unlink(struct inode *, struct dentry *); |
| 39 | static int ncp_mkdir(struct inode *, struct dentry *, int); |
| 40 | static int ncp_rmdir(struct inode *, struct dentry *); |
| 41 | static int ncp_rename(struct inode *, struct dentry *, |
| 42 | struct inode *, struct dentry *); |
| 43 | static int ncp_mknod(struct inode * dir, struct dentry *dentry, |
| 44 | int mode, dev_t rdev); |
| 45 | #if defined(CONFIG_NCPFS_EXTRAS) || defined(CONFIG_NCPFS_NFS_NS) |
| 46 | extern int ncp_symlink(struct inode *, struct dentry *, const char *); |
| 47 | #else |
| 48 | #define ncp_symlink NULL |
| 49 | #endif |
| 50 | |
| 51 | const struct file_operations ncp_dir_operations = |
| 52 | { |
| 53 | .read = generic_read_dir, |
| 54 | .readdir = ncp_readdir, |
| 55 | .ioctl = ncp_ioctl, |
| 56 | #ifdef CONFIG_COMPAT |
| 57 | .compat_ioctl = ncp_compat_ioctl, |
| 58 | #endif |
| 59 | }; |
| 60 | |
| 61 | const struct inode_operations ncp_dir_inode_operations = |
| 62 | { |
| 63 | .create = ncp_create, |
| 64 | .lookup = ncp_lookup, |
| 65 | .unlink = ncp_unlink, |
| 66 | .symlink = ncp_symlink, |
| 67 | .mkdir = ncp_mkdir, |
| 68 | .rmdir = ncp_rmdir, |
| 69 | .mknod = ncp_mknod, |
| 70 | .rename = ncp_rename, |
| 71 | .setattr = ncp_notify_change, |
| 72 | }; |
| 73 | |
| 74 | /* |
| 75 | * Dentry operations routines |
| 76 | */ |
| 77 | static int ncp_lookup_validate(struct dentry *, struct nameidata *); |
| 78 | static int ncp_hash_dentry(struct dentry *, struct qstr *); |
| 79 | static int ncp_compare_dentry (struct dentry *, struct qstr *, struct qstr *); |
| 80 | static int ncp_delete_dentry(struct dentry *); |
| 81 | |
| 82 | static const struct dentry_operations ncp_dentry_operations = |
| 83 | { |
| 84 | .d_revalidate = ncp_lookup_validate, |
| 85 | .d_hash = ncp_hash_dentry, |
| 86 | .d_compare = ncp_compare_dentry, |
| 87 | .d_delete = ncp_delete_dentry, |
| 88 | }; |
| 89 | |
| 90 | const struct dentry_operations ncp_root_dentry_operations = |
| 91 | { |
| 92 | .d_hash = ncp_hash_dentry, |
| 93 | .d_compare = ncp_compare_dentry, |
| 94 | .d_delete = ncp_delete_dentry, |
| 95 | }; |
| 96 | |
| 97 | |
| 98 | /* |
| 99 | * Note: leave the hash unchanged if the directory |
| 100 | * is case-sensitive. |
| 101 | */ |
| 102 | static int |
| 103 | ncp_hash_dentry(struct dentry *dentry, struct qstr *this) |
| 104 | { |
| 105 | struct nls_table *t; |
| 106 | unsigned long hash; |
| 107 | int i; |
| 108 | |
| 109 | t = NCP_IO_TABLE(dentry); |
| 110 | |
| 111 | if (!ncp_case_sensitive(dentry->d_inode)) { |
| 112 | hash = init_name_hash(); |
| 113 | for (i=0; i<this->len ; i++) |
| 114 | hash = partial_name_hash(ncp_tolower(t, this->name[i]), |
| 115 | hash); |
| 116 | this->hash = end_name_hash(hash); |
| 117 | } |
| 118 | return 0; |
| 119 | } |
| 120 | |
| 121 | static int |
| 122 | ncp_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b) |
| 123 | { |
| 124 | if (a->len != b->len) |
| 125 | return 1; |
| 126 | |
| 127 | if (ncp_case_sensitive(dentry->d_inode)) |
| 128 | return strncmp(a->name, b->name, a->len); |
| 129 | |
| 130 | return ncp_strnicmp(NCP_IO_TABLE(dentry), a->name, b->name, a->len); |
| 131 | } |
| 132 | |
| 133 | /* |
| 134 | * This is the callback from dput() when d_count is going to 0. |
| 135 | * We use this to unhash dentries with bad inodes. |
| 136 | * Closing files can be safely postponed until iput() - it's done there anyway. |
| 137 | */ |
| 138 | static int |
| 139 | ncp_delete_dentry(struct dentry * dentry) |
| 140 | { |
| 141 | struct inode *inode = dentry->d_inode; |
| 142 | |
| 143 | if (inode) { |
| 144 | if (is_bad_inode(inode)) |
| 145 | return 1; |
| 146 | } else |
| 147 | { |
| 148 | /* N.B. Unhash negative dentries? */ |
| 149 | } |
| 150 | return 0; |
| 151 | } |
| 152 | |
| 153 | static inline int |
| 154 | ncp_single_volume(struct ncp_server *server) |
| 155 | { |
| 156 | return (server->m.mounted_vol[0] != '\0'); |
| 157 | } |
| 158 | |
| 159 | static inline int ncp_is_server_root(struct inode *inode) |
| 160 | { |
| 161 | return (!ncp_single_volume(NCP_SERVER(inode)) && |
| 162 | inode == inode->i_sb->s_root->d_inode); |
| 163 | } |
| 164 | |
| 165 | |
| 166 | /* |
| 167 | * This is the callback when the dcache has a lookup hit. |
| 168 | */ |
| 169 | |
| 170 | |
| 171 | #ifdef CONFIG_NCPFS_STRONG |
| 172 | /* try to delete a readonly file (NW R bit set) */ |
| 173 | |
| 174 | static int |
| 175 | ncp_force_unlink(struct inode *dir, struct dentry* dentry) |
| 176 | { |
| 177 | int res=0x9c,res2; |
| 178 | struct nw_modify_dos_info info; |
| 179 | __le32 old_nwattr; |
| 180 | struct inode *inode; |
| 181 | |
| 182 | memset(&info, 0, sizeof(info)); |
| 183 | |
| 184 | /* remove the Read-Only flag on the NW server */ |
| 185 | inode = dentry->d_inode; |
| 186 | |
| 187 | old_nwattr = NCP_FINFO(inode)->nwattr; |
| 188 | info.attributes = old_nwattr & ~(aRONLY|aDELETEINHIBIT|aRENAMEINHIBIT); |
| 189 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(inode), inode, NULL, DM_ATTRIBUTES, &info); |
| 190 | if (res2) |
| 191 | goto leave_me; |
| 192 | |
| 193 | /* now try again the delete operation */ |
| 194 | res = ncp_del_file_or_subdir2(NCP_SERVER(dir), dentry); |
| 195 | |
| 196 | if (res) /* delete failed, set R bit again */ |
| 197 | { |
| 198 | info.attributes = old_nwattr; |
| 199 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(inode), inode, NULL, DM_ATTRIBUTES, &info); |
| 200 | if (res2) |
| 201 | goto leave_me; |
| 202 | } |
| 203 | leave_me: |
| 204 | return(res); |
| 205 | } |
| 206 | #endif /* CONFIG_NCPFS_STRONG */ |
| 207 | |
| 208 | #ifdef CONFIG_NCPFS_STRONG |
| 209 | static int |
| 210 | ncp_force_rename(struct inode *old_dir, struct dentry* old_dentry, char *_old_name, |
| 211 | struct inode *new_dir, struct dentry* new_dentry, char *_new_name) |
| 212 | { |
| 213 | struct nw_modify_dos_info info; |
| 214 | int res=0x90,res2; |
| 215 | struct inode *old_inode = old_dentry->d_inode; |
| 216 | __le32 old_nwattr = NCP_FINFO(old_inode)->nwattr; |
| 217 | __le32 new_nwattr = 0; /* shut compiler warning */ |
| 218 | int old_nwattr_changed = 0; |
| 219 | int new_nwattr_changed = 0; |
| 220 | |
| 221 | memset(&info, 0, sizeof(info)); |
| 222 | |
| 223 | /* remove the Read-Only flag on the NW server */ |
| 224 | |
| 225 | info.attributes = old_nwattr & ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT); |
| 226 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(old_inode), old_inode, NULL, DM_ATTRIBUTES, &info); |
| 227 | if (!res2) |
| 228 | old_nwattr_changed = 1; |
| 229 | if (new_dentry && new_dentry->d_inode) { |
| 230 | new_nwattr = NCP_FINFO(new_dentry->d_inode)->nwattr; |
| 231 | info.attributes = new_nwattr & ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT); |
| 232 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(new_dir), new_dir, _new_name, DM_ATTRIBUTES, &info); |
| 233 | if (!res2) |
| 234 | new_nwattr_changed = 1; |
| 235 | } |
| 236 | /* now try again the rename operation */ |
| 237 | /* but only if something really happened */ |
| 238 | if (new_nwattr_changed || old_nwattr_changed) { |
| 239 | res = ncp_ren_or_mov_file_or_subdir(NCP_SERVER(old_dir), |
| 240 | old_dir, _old_name, |
| 241 | new_dir, _new_name); |
| 242 | } |
| 243 | if (res) |
| 244 | goto leave_me; |
| 245 | /* file was successfully renamed, so: |
| 246 | do not set attributes on old file - it no longer exists |
| 247 | copy attributes from old file to new */ |
| 248 | new_nwattr_changed = old_nwattr_changed; |
| 249 | new_nwattr = old_nwattr; |
| 250 | old_nwattr_changed = 0; |
| 251 | |
| 252 | leave_me:; |
| 253 | if (old_nwattr_changed) { |
| 254 | info.attributes = old_nwattr; |
| 255 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(old_inode), old_inode, NULL, DM_ATTRIBUTES, &info); |
| 256 | /* ignore errors */ |
| 257 | } |
| 258 | if (new_nwattr_changed) { |
| 259 | info.attributes = new_nwattr; |
| 260 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(new_dir), new_dir, _new_name, DM_ATTRIBUTES, &info); |
| 261 | /* ignore errors */ |
| 262 | } |
| 263 | return(res); |
| 264 | } |
| 265 | #endif /* CONFIG_NCPFS_STRONG */ |
| 266 | |
| 267 | |
| 268 | static int |
| 269 | __ncp_lookup_validate(struct dentry *dentry) |
| 270 | { |
| 271 | struct ncp_server *server; |
| 272 | struct dentry *parent; |
| 273 | struct inode *dir; |
| 274 | struct ncp_entry_info finfo; |
| 275 | int res, val = 0, len; |
| 276 | __u8 __name[NCP_MAXPATHLEN + 1]; |
| 277 | |
| 278 | parent = dget_parent(dentry); |
| 279 | dir = parent->d_inode; |
| 280 | |
| 281 | if (!dentry->d_inode) |
| 282 | goto finished; |
| 283 | |
| 284 | server = NCP_SERVER(dir); |
| 285 | |
| 286 | if (!ncp_conn_valid(server)) |
| 287 | goto finished; |
| 288 | |
| 289 | /* |
| 290 | * Inspired by smbfs: |
| 291 | * The default validation is based on dentry age: |
| 292 | * We set the max age at mount time. (But each |
| 293 | * successful server lookup renews the timestamp.) |
| 294 | */ |
| 295 | val = NCP_TEST_AGE(server, dentry); |
| 296 | if (val) |
| 297 | goto finished; |
| 298 | |
| 299 | DDPRINTK("ncp_lookup_validate: %s/%s not valid, age=%ld, server lookup\n", |
| 300 | dentry->d_parent->d_name.name, dentry->d_name.name, |
| 301 | NCP_GET_AGE(dentry)); |
| 302 | |
| 303 | len = sizeof(__name); |
| 304 | if (ncp_is_server_root(dir)) { |
| 305 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, |
| 306 | dentry->d_name.len, 1); |
| 307 | if (!res) |
| 308 | res = ncp_lookup_volume(server, __name, &(finfo.i)); |
| 309 | } else { |
| 310 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, |
| 311 | dentry->d_name.len, !ncp_preserve_case(dir)); |
| 312 | if (!res) |
| 313 | res = ncp_obtain_info(server, dir, __name, &(finfo.i)); |
| 314 | } |
| 315 | finfo.volume = finfo.i.volNumber; |
| 316 | DDPRINTK("ncp_lookup_validate: looked for %s/%s, res=%d\n", |
| 317 | dentry->d_parent->d_name.name, __name, res); |
| 318 | /* |
| 319 | * If we didn't find it, or if it has a different dirEntNum to |
| 320 | * what we remember, it's not valid any more. |
| 321 | */ |
| 322 | if (!res) { |
| 323 | if (finfo.i.dirEntNum == NCP_FINFO(dentry->d_inode)->dirEntNum) { |
| 324 | ncp_new_dentry(dentry); |
| 325 | val=1; |
| 326 | } else |
| 327 | DDPRINTK("ncp_lookup_validate: found, but dirEntNum changed\n"); |
| 328 | |
| 329 | ncp_update_inode2(dentry->d_inode, &finfo); |
| 330 | } |
| 331 | |
| 332 | finished: |
| 333 | DDPRINTK("ncp_lookup_validate: result=%d\n", val); |
| 334 | dput(parent); |
| 335 | return val; |
| 336 | } |
| 337 | |
| 338 | static int |
| 339 | ncp_lookup_validate(struct dentry * dentry, struct nameidata *nd) |
| 340 | { |
| 341 | int res; |
| 342 | lock_kernel(); |
| 343 | res = __ncp_lookup_validate(dentry); |
| 344 | unlock_kernel(); |
| 345 | return res; |
| 346 | } |
| 347 | |
| 348 | static struct dentry * |
| 349 | ncp_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos) |
| 350 | { |
| 351 | struct dentry *dent = dentry; |
| 352 | struct list_head *next; |
| 353 | |
| 354 | if (d_validate(dent, parent)) { |
| 355 | if (dent->d_name.len <= NCP_MAXPATHLEN && |
| 356 | (unsigned long)dent->d_fsdata == fpos) { |
| 357 | if (!dent->d_inode) { |
| 358 | dput(dent); |
| 359 | dent = NULL; |
| 360 | } |
| 361 | return dent; |
| 362 | } |
| 363 | dput(dent); |
| 364 | } |
| 365 | |
| 366 | /* If a pointer is invalid, we search the dentry. */ |
| 367 | spin_lock(&dcache_lock); |
| 368 | next = parent->d_subdirs.next; |
| 369 | while (next != &parent->d_subdirs) { |
| 370 | dent = list_entry(next, struct dentry, d_u.d_child); |
| 371 | if ((unsigned long)dent->d_fsdata == fpos) { |
| 372 | if (dent->d_inode) |
| 373 | dget_locked(dent); |
| 374 | else |
| 375 | dent = NULL; |
| 376 | spin_unlock(&dcache_lock); |
| 377 | goto out; |
| 378 | } |
| 379 | next = next->next; |
| 380 | } |
| 381 | spin_unlock(&dcache_lock); |
| 382 | return NULL; |
| 383 | |
| 384 | out: |
| 385 | return dent; |
| 386 | } |
| 387 | |
| 388 | static time_t ncp_obtain_mtime(struct dentry *dentry) |
| 389 | { |
| 390 | struct inode *inode = dentry->d_inode; |
| 391 | struct ncp_server *server = NCP_SERVER(inode); |
| 392 | struct nw_info_struct i; |
| 393 | |
| 394 | if (!ncp_conn_valid(server) || ncp_is_server_root(inode)) |
| 395 | return 0; |
| 396 | |
| 397 | if (ncp_obtain_info(server, inode, NULL, &i)) |
| 398 | return 0; |
| 399 | |
| 400 | return ncp_date_dos2unix(i.modifyTime, i.modifyDate); |
| 401 | } |
| 402 | |
| 403 | static int ncp_readdir(struct file *filp, void *dirent, filldir_t filldir) |
| 404 | { |
| 405 | struct dentry *dentry = filp->f_path.dentry; |
| 406 | struct inode *inode = dentry->d_inode; |
| 407 | struct page *page = NULL; |
| 408 | struct ncp_server *server = NCP_SERVER(inode); |
| 409 | union ncp_dir_cache *cache = NULL; |
| 410 | struct ncp_cache_control ctl; |
| 411 | int result, mtime_valid = 0; |
| 412 | time_t mtime = 0; |
| 413 | |
| 414 | lock_kernel(); |
| 415 | |
| 416 | ctl.page = NULL; |
| 417 | ctl.cache = NULL; |
| 418 | |
| 419 | DDPRINTK("ncp_readdir: reading %s/%s, pos=%d\n", |
| 420 | dentry->d_parent->d_name.name, dentry->d_name.name, |
| 421 | (int) filp->f_pos); |
| 422 | |
| 423 | result = -EIO; |
| 424 | if (!ncp_conn_valid(server)) |
| 425 | goto out; |
| 426 | |
| 427 | result = 0; |
| 428 | if (filp->f_pos == 0) { |
| 429 | if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR)) |
| 430 | goto out; |
| 431 | filp->f_pos = 1; |
| 432 | } |
| 433 | if (filp->f_pos == 1) { |
| 434 | if (filldir(dirent, "..", 2, 1, parent_ino(dentry), DT_DIR)) |
| 435 | goto out; |
| 436 | filp->f_pos = 2; |
| 437 | } |
| 438 | |
| 439 | page = grab_cache_page(&inode->i_data, 0); |
| 440 | if (!page) |
| 441 | goto read_really; |
| 442 | |
| 443 | ctl.cache = cache = kmap(page); |
| 444 | ctl.head = cache->head; |
| 445 | |
| 446 | if (!PageUptodate(page) || !ctl.head.eof) |
| 447 | goto init_cache; |
| 448 | |
| 449 | if (filp->f_pos == 2) { |
| 450 | if (jiffies - ctl.head.time >= NCP_MAX_AGE(server)) |
| 451 | goto init_cache; |
| 452 | |
| 453 | mtime = ncp_obtain_mtime(dentry); |
| 454 | mtime_valid = 1; |
| 455 | if ((!mtime) || (mtime != ctl.head.mtime)) |
| 456 | goto init_cache; |
| 457 | } |
| 458 | |
| 459 | if (filp->f_pos > ctl.head.end) |
| 460 | goto finished; |
| 461 | |
| 462 | ctl.fpos = filp->f_pos + (NCP_DIRCACHE_START - 2); |
| 463 | ctl.ofs = ctl.fpos / NCP_DIRCACHE_SIZE; |
| 464 | ctl.idx = ctl.fpos % NCP_DIRCACHE_SIZE; |
| 465 | |
| 466 | for (;;) { |
| 467 | if (ctl.ofs != 0) { |
| 468 | ctl.page = find_lock_page(&inode->i_data, ctl.ofs); |
| 469 | if (!ctl.page) |
| 470 | goto invalid_cache; |
| 471 | ctl.cache = kmap(ctl.page); |
| 472 | if (!PageUptodate(ctl.page)) |
| 473 | goto invalid_cache; |
| 474 | } |
| 475 | while (ctl.idx < NCP_DIRCACHE_SIZE) { |
| 476 | struct dentry *dent; |
| 477 | int res; |
| 478 | |
| 479 | dent = ncp_dget_fpos(ctl.cache->dentry[ctl.idx], |
| 480 | dentry, filp->f_pos); |
| 481 | if (!dent) |
| 482 | goto invalid_cache; |
| 483 | res = filldir(dirent, dent->d_name.name, |
| 484 | dent->d_name.len, filp->f_pos, |
| 485 | dent->d_inode->i_ino, DT_UNKNOWN); |
| 486 | dput(dent); |
| 487 | if (res) |
| 488 | goto finished; |
| 489 | filp->f_pos += 1; |
| 490 | ctl.idx += 1; |
| 491 | if (filp->f_pos > ctl.head.end) |
| 492 | goto finished; |
| 493 | } |
| 494 | if (ctl.page) { |
| 495 | kunmap(ctl.page); |
| 496 | SetPageUptodate(ctl.page); |
| 497 | unlock_page(ctl.page); |
| 498 | page_cache_release(ctl.page); |
| 499 | ctl.page = NULL; |
| 500 | } |
| 501 | ctl.idx = 0; |
| 502 | ctl.ofs += 1; |
| 503 | } |
| 504 | invalid_cache: |
| 505 | if (ctl.page) { |
| 506 | kunmap(ctl.page); |
| 507 | unlock_page(ctl.page); |
| 508 | page_cache_release(ctl.page); |
| 509 | ctl.page = NULL; |
| 510 | } |
| 511 | ctl.cache = cache; |
| 512 | init_cache: |
| 513 | ncp_invalidate_dircache_entries(dentry); |
| 514 | if (!mtime_valid) { |
| 515 | mtime = ncp_obtain_mtime(dentry); |
| 516 | mtime_valid = 1; |
| 517 | } |
| 518 | ctl.head.mtime = mtime; |
| 519 | ctl.head.time = jiffies; |
| 520 | ctl.head.eof = 0; |
| 521 | ctl.fpos = 2; |
| 522 | ctl.ofs = 0; |
| 523 | ctl.idx = NCP_DIRCACHE_START; |
| 524 | ctl.filled = 0; |
| 525 | ctl.valid = 1; |
| 526 | read_really: |
| 527 | if (ncp_is_server_root(inode)) { |
| 528 | ncp_read_volume_list(filp, dirent, filldir, &ctl); |
| 529 | } else { |
| 530 | ncp_do_readdir(filp, dirent, filldir, &ctl); |
| 531 | } |
| 532 | ctl.head.end = ctl.fpos - 1; |
| 533 | ctl.head.eof = ctl.valid; |
| 534 | finished: |
| 535 | if (page) { |
| 536 | cache->head = ctl.head; |
| 537 | kunmap(page); |
| 538 | SetPageUptodate(page); |
| 539 | unlock_page(page); |
| 540 | page_cache_release(page); |
| 541 | } |
| 542 | if (ctl.page) { |
| 543 | kunmap(ctl.page); |
| 544 | SetPageUptodate(ctl.page); |
| 545 | unlock_page(ctl.page); |
| 546 | page_cache_release(ctl.page); |
| 547 | } |
| 548 | out: |
| 549 | unlock_kernel(); |
| 550 | return result; |
| 551 | } |
| 552 | |
| 553 | static int |
| 554 | ncp_fill_cache(struct file *filp, void *dirent, filldir_t filldir, |
| 555 | struct ncp_cache_control *ctrl, struct ncp_entry_info *entry) |
| 556 | { |
| 557 | struct dentry *newdent, *dentry = filp->f_path.dentry; |
| 558 | struct inode *newino, *inode = dentry->d_inode; |
| 559 | struct ncp_cache_control ctl = *ctrl; |
| 560 | struct qstr qname; |
| 561 | int valid = 0; |
| 562 | int hashed = 0; |
| 563 | ino_t ino = 0; |
| 564 | __u8 __name[NCP_MAXPATHLEN + 1]; |
| 565 | |
| 566 | qname.len = sizeof(__name); |
| 567 | if (ncp_vol2io(NCP_SERVER(inode), __name, &qname.len, |
| 568 | entry->i.entryName, entry->i.nameLen, |
| 569 | !ncp_preserve_entry_case(inode, entry->i.NSCreator))) |
| 570 | return 1; /* I'm not sure */ |
| 571 | |
| 572 | qname.name = __name; |
| 573 | qname.hash = full_name_hash(qname.name, qname.len); |
| 574 | |
| 575 | if (dentry->d_op && dentry->d_op->d_hash) |
| 576 | if (dentry->d_op->d_hash(dentry, &qname) != 0) |
| 577 | goto end_advance; |
| 578 | |
| 579 | newdent = d_lookup(dentry, &qname); |
| 580 | |
| 581 | if (!newdent) { |
| 582 | newdent = d_alloc(dentry, &qname); |
| 583 | if (!newdent) |
| 584 | goto end_advance; |
| 585 | } else { |
| 586 | hashed = 1; |
| 587 | memcpy((char *) newdent->d_name.name, qname.name, |
| 588 | newdent->d_name.len); |
| 589 | } |
| 590 | |
| 591 | if (!newdent->d_inode) { |
| 592 | entry->opened = 0; |
| 593 | entry->ino = iunique(inode->i_sb, 2); |
| 594 | newino = ncp_iget(inode->i_sb, entry); |
| 595 | if (newino) { |
| 596 | newdent->d_op = &ncp_dentry_operations; |
| 597 | d_instantiate(newdent, newino); |
| 598 | if (!hashed) |
| 599 | d_rehash(newdent); |
| 600 | } |
| 601 | } else |
| 602 | ncp_update_inode2(newdent->d_inode, entry); |
| 603 | |
| 604 | if (newdent->d_inode) { |
| 605 | ino = newdent->d_inode->i_ino; |
| 606 | newdent->d_fsdata = (void *) ctl.fpos; |
| 607 | ncp_new_dentry(newdent); |
| 608 | } |
| 609 | |
| 610 | if (ctl.idx >= NCP_DIRCACHE_SIZE) { |
| 611 | if (ctl.page) { |
| 612 | kunmap(ctl.page); |
| 613 | SetPageUptodate(ctl.page); |
| 614 | unlock_page(ctl.page); |
| 615 | page_cache_release(ctl.page); |
| 616 | } |
| 617 | ctl.cache = NULL; |
| 618 | ctl.idx -= NCP_DIRCACHE_SIZE; |
| 619 | ctl.ofs += 1; |
| 620 | ctl.page = grab_cache_page(&inode->i_data, ctl.ofs); |
| 621 | if (ctl.page) |
| 622 | ctl.cache = kmap(ctl.page); |
| 623 | } |
| 624 | if (ctl.cache) { |
| 625 | ctl.cache->dentry[ctl.idx] = newdent; |
| 626 | valid = 1; |
| 627 | } |
| 628 | dput(newdent); |
| 629 | end_advance: |
| 630 | if (!valid) |
| 631 | ctl.valid = 0; |
| 632 | if (!ctl.filled && (ctl.fpos == filp->f_pos)) { |
| 633 | if (!ino) |
| 634 | ino = find_inode_number(dentry, &qname); |
| 635 | if (!ino) |
| 636 | ino = iunique(inode->i_sb, 2); |
| 637 | ctl.filled = filldir(dirent, qname.name, qname.len, |
| 638 | filp->f_pos, ino, DT_UNKNOWN); |
| 639 | if (!ctl.filled) |
| 640 | filp->f_pos += 1; |
| 641 | } |
| 642 | ctl.fpos += 1; |
| 643 | ctl.idx += 1; |
| 644 | *ctrl = ctl; |
| 645 | return (ctl.valid || !ctl.filled); |
| 646 | } |
| 647 | |
| 648 | static void |
| 649 | ncp_read_volume_list(struct file *filp, void *dirent, filldir_t filldir, |
| 650 | struct ncp_cache_control *ctl) |
| 651 | { |
| 652 | struct dentry *dentry = filp->f_path.dentry; |
| 653 | struct inode *inode = dentry->d_inode; |
| 654 | struct ncp_server *server = NCP_SERVER(inode); |
| 655 | struct ncp_volume_info info; |
| 656 | struct ncp_entry_info entry; |
| 657 | int i; |
| 658 | |
| 659 | DPRINTK("ncp_read_volume_list: pos=%ld\n", |
| 660 | (unsigned long) filp->f_pos); |
| 661 | |
| 662 | for (i = 0; i < NCP_NUMBER_OF_VOLUMES; i++) { |
| 663 | |
| 664 | if (ncp_get_volume_info_with_number(server, i, &info) != 0) |
| 665 | return; |
| 666 | if (!strlen(info.volume_name)) |
| 667 | continue; |
| 668 | |
| 669 | DPRINTK("ncp_read_volume_list: found vol: %s\n", |
| 670 | info.volume_name); |
| 671 | |
| 672 | if (ncp_lookup_volume(server, info.volume_name, |
| 673 | &entry.i)) { |
| 674 | DPRINTK("ncpfs: could not lookup vol %s\n", |
| 675 | info.volume_name); |
| 676 | continue; |
| 677 | } |
| 678 | entry.volume = entry.i.volNumber; |
| 679 | if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry)) |
| 680 | return; |
| 681 | } |
| 682 | } |
| 683 | |
| 684 | static void |
| 685 | ncp_do_readdir(struct file *filp, void *dirent, filldir_t filldir, |
| 686 | struct ncp_cache_control *ctl) |
| 687 | { |
| 688 | struct dentry *dentry = filp->f_path.dentry; |
| 689 | struct inode *dir = dentry->d_inode; |
| 690 | struct ncp_server *server = NCP_SERVER(dir); |
| 691 | struct nw_search_sequence seq; |
| 692 | struct ncp_entry_info entry; |
| 693 | int err; |
| 694 | void* buf; |
| 695 | int more; |
| 696 | size_t bufsize; |
| 697 | |
| 698 | DPRINTK("ncp_do_readdir: %s/%s, fpos=%ld\n", |
| 699 | dentry->d_parent->d_name.name, dentry->d_name.name, |
| 700 | (unsigned long) filp->f_pos); |
| 701 | PPRINTK("ncp_do_readdir: init %s, volnum=%d, dirent=%u\n", |
| 702 | dentry->d_name.name, NCP_FINFO(dir)->volNumber, |
| 703 | NCP_FINFO(dir)->dirEntNum); |
| 704 | |
| 705 | err = ncp_initialize_search(server, dir, &seq); |
| 706 | if (err) { |
| 707 | DPRINTK("ncp_do_readdir: init failed, err=%d\n", err); |
| 708 | return; |
| 709 | } |
| 710 | /* We MUST NOT use server->buffer_size handshaked with server if we are |
| 711 | using UDP, as for UDP server uses max. buffer size determined by |
| 712 | MTU, and for TCP server uses hardwired value 65KB (== 66560 bytes). |
| 713 | So we use 128KB, just to be sure, as there is no way how to know |
| 714 | this value in advance. */ |
| 715 | bufsize = 131072; |
| 716 | buf = vmalloc(bufsize); |
| 717 | if (!buf) |
| 718 | return; |
| 719 | do { |
| 720 | int cnt; |
| 721 | char* rpl; |
| 722 | size_t rpls; |
| 723 | |
| 724 | err = ncp_search_for_fileset(server, &seq, &more, &cnt, buf, bufsize, &rpl, &rpls); |
| 725 | if (err) /* Error */ |
| 726 | break; |
| 727 | if (!cnt) /* prevent endless loop */ |
| 728 | break; |
| 729 | while (cnt--) { |
| 730 | size_t onerpl; |
| 731 | |
| 732 | if (rpls < offsetof(struct nw_info_struct, entryName)) |
| 733 | break; /* short packet */ |
| 734 | ncp_extract_file_info(rpl, &entry.i); |
| 735 | onerpl = offsetof(struct nw_info_struct, entryName) + entry.i.nameLen; |
| 736 | if (rpls < onerpl) |
| 737 | break; /* short packet */ |
| 738 | (void)ncp_obtain_nfs_info(server, &entry.i); |
| 739 | rpl += onerpl; |
| 740 | rpls -= onerpl; |
| 741 | entry.volume = entry.i.volNumber; |
| 742 | if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry)) |
| 743 | break; |
| 744 | } |
| 745 | } while (more); |
| 746 | vfree(buf); |
| 747 | return; |
| 748 | } |
| 749 | |
| 750 | int ncp_conn_logged_in(struct super_block *sb) |
| 751 | { |
| 752 | struct ncp_server* server = NCP_SBP(sb); |
| 753 | int result; |
| 754 | |
| 755 | if (ncp_single_volume(server)) { |
| 756 | int len; |
| 757 | struct dentry* dent; |
| 758 | __u32 volNumber; |
| 759 | __le32 dirEntNum; |
| 760 | __le32 DosDirNum; |
| 761 | __u8 __name[NCP_MAXPATHLEN + 1]; |
| 762 | |
| 763 | len = sizeof(__name); |
| 764 | result = ncp_io2vol(server, __name, &len, server->m.mounted_vol, |
| 765 | strlen(server->m.mounted_vol), 1); |
| 766 | if (result) |
| 767 | goto out; |
| 768 | result = -ENOENT; |
| 769 | if (ncp_get_volume_root(server, __name, &volNumber, &dirEntNum, &DosDirNum)) { |
| 770 | PPRINTK("ncp_conn_logged_in: %s not found\n", |
| 771 | server->m.mounted_vol); |
| 772 | goto out; |
| 773 | } |
| 774 | dent = sb->s_root; |
| 775 | if (dent) { |
| 776 | struct inode* ino = dent->d_inode; |
| 777 | if (ino) { |
| 778 | NCP_FINFO(ino)->volNumber = volNumber; |
| 779 | NCP_FINFO(ino)->dirEntNum = dirEntNum; |
| 780 | NCP_FINFO(ino)->DosDirNum = DosDirNum; |
| 781 | } else { |
| 782 | DPRINTK("ncpfs: sb->s_root->d_inode == NULL!\n"); |
| 783 | } |
| 784 | } else { |
| 785 | DPRINTK("ncpfs: sb->s_root == NULL!\n"); |
| 786 | } |
| 787 | } |
| 788 | result = 0; |
| 789 | |
| 790 | out: |
| 791 | return result; |
| 792 | } |
| 793 | |
| 794 | static struct dentry *ncp_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) |
| 795 | { |
| 796 | struct ncp_server *server = NCP_SERVER(dir); |
| 797 | struct inode *inode = NULL; |
| 798 | struct ncp_entry_info finfo; |
| 799 | int error, res, len; |
| 800 | __u8 __name[NCP_MAXPATHLEN + 1]; |
| 801 | |
| 802 | lock_kernel(); |
| 803 | error = -EIO; |
| 804 | if (!ncp_conn_valid(server)) |
| 805 | goto finished; |
| 806 | |
| 807 | PPRINTK("ncp_lookup: server lookup for %s/%s\n", |
| 808 | dentry->d_parent->d_name.name, dentry->d_name.name); |
| 809 | |
| 810 | len = sizeof(__name); |
| 811 | if (ncp_is_server_root(dir)) { |
| 812 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, |
| 813 | dentry->d_name.len, 1); |
| 814 | if (!res) |
| 815 | res = ncp_lookup_volume(server, __name, &(finfo.i)); |
| 816 | } else { |
| 817 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, |
| 818 | dentry->d_name.len, !ncp_preserve_case(dir)); |
| 819 | if (!res) |
| 820 | res = ncp_obtain_info(server, dir, __name, &(finfo.i)); |
| 821 | } |
| 822 | PPRINTK("ncp_lookup: looked for %s/%s, res=%d\n", |
| 823 | dentry->d_parent->d_name.name, __name, res); |
| 824 | /* |
| 825 | * If we didn't find an entry, make a negative dentry. |
| 826 | */ |
| 827 | if (res) |
| 828 | goto add_entry; |
| 829 | |
| 830 | /* |
| 831 | * Create an inode for the entry. |
| 832 | */ |
| 833 | finfo.opened = 0; |
| 834 | finfo.ino = iunique(dir->i_sb, 2); |
| 835 | finfo.volume = finfo.i.volNumber; |
| 836 | error = -EACCES; |
| 837 | inode = ncp_iget(dir->i_sb, &finfo); |
| 838 | |
| 839 | if (inode) { |
| 840 | ncp_new_dentry(dentry); |
| 841 | add_entry: |
| 842 | dentry->d_op = &ncp_dentry_operations; |
| 843 | d_add(dentry, inode); |
| 844 | error = 0; |
| 845 | } |
| 846 | |
| 847 | finished: |
| 848 | PPRINTK("ncp_lookup: result=%d\n", error); |
| 849 | unlock_kernel(); |
| 850 | return ERR_PTR(error); |
| 851 | } |
| 852 | |
| 853 | /* |
| 854 | * This code is common to create, mkdir, and mknod. |
| 855 | */ |
| 856 | static int ncp_instantiate(struct inode *dir, struct dentry *dentry, |
| 857 | struct ncp_entry_info *finfo) |
| 858 | { |
| 859 | struct inode *inode; |
| 860 | int error = -EINVAL; |
| 861 | |
| 862 | finfo->ino = iunique(dir->i_sb, 2); |
| 863 | inode = ncp_iget(dir->i_sb, finfo); |
| 864 | if (!inode) |
| 865 | goto out_close; |
| 866 | d_instantiate(dentry,inode); |
| 867 | error = 0; |
| 868 | out: |
| 869 | return error; |
| 870 | |
| 871 | out_close: |
| 872 | PPRINTK("ncp_instantiate: %s/%s failed, closing file\n", |
| 873 | dentry->d_parent->d_name.name, dentry->d_name.name); |
| 874 | ncp_close_file(NCP_SERVER(dir), finfo->file_handle); |
| 875 | goto out; |
| 876 | } |
| 877 | |
| 878 | int ncp_create_new(struct inode *dir, struct dentry *dentry, int mode, |
| 879 | dev_t rdev, __le32 attributes) |
| 880 | { |
| 881 | struct ncp_server *server = NCP_SERVER(dir); |
| 882 | struct ncp_entry_info finfo; |
| 883 | int error, result, len; |
| 884 | int opmode; |
| 885 | __u8 __name[NCP_MAXPATHLEN + 1]; |
| 886 | |
| 887 | PPRINTK("ncp_create_new: creating %s/%s, mode=%x\n", |
| 888 | dentry->d_parent->d_name.name, dentry->d_name.name, mode); |
| 889 | |
| 890 | error = -EIO; |
| 891 | lock_kernel(); |
| 892 | if (!ncp_conn_valid(server)) |
| 893 | goto out; |
| 894 | |
| 895 | ncp_age_dentry(server, dentry); |
| 896 | len = sizeof(__name); |
| 897 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, |
| 898 | dentry->d_name.len, !ncp_preserve_case(dir)); |
| 899 | if (error) |
| 900 | goto out; |
| 901 | |
| 902 | error = -EACCES; |
| 903 | |
| 904 | if (S_ISREG(mode) && |
| 905 | (server->m.flags & NCP_MOUNT_EXTRAS) && |
| 906 | (mode & S_IXUGO)) |
| 907 | attributes |= aSYSTEM | aSHARED; |
| 908 | |
| 909 | result = ncp_open_create_file_or_subdir(server, dir, __name, |
| 910 | OC_MODE_CREATE | OC_MODE_OPEN | OC_MODE_REPLACE, |
| 911 | attributes, AR_READ | AR_WRITE, &finfo); |
| 912 | opmode = O_RDWR; |
| 913 | if (result) { |
| 914 | result = ncp_open_create_file_or_subdir(server, dir, __name, |
| 915 | OC_MODE_CREATE | OC_MODE_OPEN | OC_MODE_REPLACE, |
| 916 | attributes, AR_WRITE, &finfo); |
| 917 | if (result) { |
| 918 | if (result == 0x87) |
| 919 | error = -ENAMETOOLONG; |
| 920 | DPRINTK("ncp_create: %s/%s failed\n", |
| 921 | dentry->d_parent->d_name.name, dentry->d_name.name); |
| 922 | goto out; |
| 923 | } |
| 924 | opmode = O_WRONLY; |
| 925 | } |
| 926 | finfo.access = opmode; |
| 927 | if (ncp_is_nfs_extras(server, finfo.volume)) { |
| 928 | finfo.i.nfs.mode = mode; |
| 929 | finfo.i.nfs.rdev = new_encode_dev(rdev); |
| 930 | if (ncp_modify_nfs_info(server, finfo.volume, |
| 931 | finfo.i.dirEntNum, |
| 932 | mode, new_encode_dev(rdev)) != 0) |
| 933 | goto out; |
| 934 | } |
| 935 | |
| 936 | error = ncp_instantiate(dir, dentry, &finfo); |
| 937 | out: |
| 938 | unlock_kernel(); |
| 939 | return error; |
| 940 | } |
| 941 | |
| 942 | static int ncp_create(struct inode *dir, struct dentry *dentry, int mode, |
| 943 | struct nameidata *nd) |
| 944 | { |
| 945 | return ncp_create_new(dir, dentry, mode, 0, 0); |
| 946 | } |
| 947 | |
| 948 | static int ncp_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
| 949 | { |
| 950 | struct ncp_entry_info finfo; |
| 951 | struct ncp_server *server = NCP_SERVER(dir); |
| 952 | int error, len; |
| 953 | __u8 __name[NCP_MAXPATHLEN + 1]; |
| 954 | |
| 955 | DPRINTK("ncp_mkdir: making %s/%s\n", |
| 956 | dentry->d_parent->d_name.name, dentry->d_name.name); |
| 957 | |
| 958 | error = -EIO; |
| 959 | lock_kernel(); |
| 960 | if (!ncp_conn_valid(server)) |
| 961 | goto out; |
| 962 | |
| 963 | ncp_age_dentry(server, dentry); |
| 964 | len = sizeof(__name); |
| 965 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, |
| 966 | dentry->d_name.len, !ncp_preserve_case(dir)); |
| 967 | if (error) |
| 968 | goto out; |
| 969 | |
| 970 | error = -EACCES; |
| 971 | if (ncp_open_create_file_or_subdir(server, dir, __name, |
| 972 | OC_MODE_CREATE, aDIR, |
| 973 | cpu_to_le16(0xffff), |
| 974 | &finfo) == 0) |
| 975 | { |
| 976 | if (ncp_is_nfs_extras(server, finfo.volume)) { |
| 977 | mode |= S_IFDIR; |
| 978 | finfo.i.nfs.mode = mode; |
| 979 | if (ncp_modify_nfs_info(server, |
| 980 | finfo.volume, |
| 981 | finfo.i.dirEntNum, |
| 982 | mode, 0) != 0) |
| 983 | goto out; |
| 984 | } |
| 985 | error = ncp_instantiate(dir, dentry, &finfo); |
| 986 | } |
| 987 | out: |
| 988 | unlock_kernel(); |
| 989 | return error; |
| 990 | } |
| 991 | |
| 992 | static int ncp_rmdir(struct inode *dir, struct dentry *dentry) |
| 993 | { |
| 994 | struct ncp_server *server = NCP_SERVER(dir); |
| 995 | int error, result, len; |
| 996 | __u8 __name[NCP_MAXPATHLEN + 1]; |
| 997 | |
| 998 | DPRINTK("ncp_rmdir: removing %s/%s\n", |
| 999 | dentry->d_parent->d_name.name, dentry->d_name.name); |
| 1000 | |
| 1001 | error = -EIO; |
| 1002 | lock_kernel(); |
| 1003 | if (!ncp_conn_valid(server)) |
| 1004 | goto out; |
| 1005 | |
| 1006 | error = -EBUSY; |
| 1007 | if (!d_unhashed(dentry)) |
| 1008 | goto out; |
| 1009 | |
| 1010 | len = sizeof(__name); |
| 1011 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, |
| 1012 | dentry->d_name.len, !ncp_preserve_case(dir)); |
| 1013 | if (error) |
| 1014 | goto out; |
| 1015 | |
| 1016 | result = ncp_del_file_or_subdir(server, dir, __name); |
| 1017 | switch (result) { |
| 1018 | case 0x00: |
| 1019 | error = 0; |
| 1020 | break; |
| 1021 | case 0x85: /* unauthorized to delete file */ |
| 1022 | case 0x8A: /* unauthorized to delete file */ |
| 1023 | error = -EACCES; |
| 1024 | break; |
| 1025 | case 0x8F: |
| 1026 | case 0x90: /* read only */ |
| 1027 | error = -EPERM; |
| 1028 | break; |
| 1029 | case 0x9F: /* in use by another client */ |
| 1030 | error = -EBUSY; |
| 1031 | break; |
| 1032 | case 0xA0: /* directory not empty */ |
| 1033 | error = -ENOTEMPTY; |
| 1034 | break; |
| 1035 | case 0xFF: /* someone deleted file */ |
| 1036 | error = -ENOENT; |
| 1037 | break; |
| 1038 | default: |
| 1039 | error = -EACCES; |
| 1040 | break; |
| 1041 | } |
| 1042 | out: |
| 1043 | unlock_kernel(); |
| 1044 | return error; |
| 1045 | } |
| 1046 | |
| 1047 | static int ncp_unlink(struct inode *dir, struct dentry *dentry) |
| 1048 | { |
| 1049 | struct inode *inode = dentry->d_inode; |
| 1050 | struct ncp_server *server; |
| 1051 | int error; |
| 1052 | |
| 1053 | lock_kernel(); |
| 1054 | server = NCP_SERVER(dir); |
| 1055 | DPRINTK("ncp_unlink: unlinking %s/%s\n", |
| 1056 | dentry->d_parent->d_name.name, dentry->d_name.name); |
| 1057 | |
| 1058 | error = -EIO; |
| 1059 | if (!ncp_conn_valid(server)) |
| 1060 | goto out; |
| 1061 | |
| 1062 | /* |
| 1063 | * Check whether to close the file ... |
| 1064 | */ |
| 1065 | if (inode) { |
| 1066 | PPRINTK("ncp_unlink: closing file\n"); |
| 1067 | ncp_make_closed(inode); |
| 1068 | } |
| 1069 | |
| 1070 | error = ncp_del_file_or_subdir2(server, dentry); |
| 1071 | #ifdef CONFIG_NCPFS_STRONG |
| 1072 | /* 9C is Invalid path.. It should be 8F, 90 - read only, but |
| 1073 | it is not :-( */ |
| 1074 | if ((error == 0x9C || error == 0x90) && server->m.flags & NCP_MOUNT_STRONG) { /* R/O */ |
| 1075 | error = ncp_force_unlink(dir, dentry); |
| 1076 | } |
| 1077 | #endif |
| 1078 | switch (error) { |
| 1079 | case 0x00: |
| 1080 | DPRINTK("ncp: removed %s/%s\n", |
| 1081 | dentry->d_parent->d_name.name, dentry->d_name.name); |
| 1082 | break; |
| 1083 | case 0x85: |
| 1084 | case 0x8A: |
| 1085 | error = -EACCES; |
| 1086 | break; |
| 1087 | case 0x8D: /* some files in use */ |
| 1088 | case 0x8E: /* all files in use */ |
| 1089 | error = -EBUSY; |
| 1090 | break; |
| 1091 | case 0x8F: /* some read only */ |
| 1092 | case 0x90: /* all read only */ |
| 1093 | case 0x9C: /* !!! returned when in-use or read-only by NW4 */ |
| 1094 | error = -EPERM; |
| 1095 | break; |
| 1096 | case 0xFF: |
| 1097 | error = -ENOENT; |
| 1098 | break; |
| 1099 | default: |
| 1100 | error = -EACCES; |
| 1101 | break; |
| 1102 | } |
| 1103 | |
| 1104 | out: |
| 1105 | unlock_kernel(); |
| 1106 | return error; |
| 1107 | } |
| 1108 | |
| 1109 | static int ncp_rename(struct inode *old_dir, struct dentry *old_dentry, |
| 1110 | struct inode *new_dir, struct dentry *new_dentry) |
| 1111 | { |
| 1112 | struct ncp_server *server = NCP_SERVER(old_dir); |
| 1113 | int error; |
| 1114 | int old_len, new_len; |
| 1115 | __u8 __old_name[NCP_MAXPATHLEN + 1], __new_name[NCP_MAXPATHLEN + 1]; |
| 1116 | |
| 1117 | DPRINTK("ncp_rename: %s/%s to %s/%s\n", |
| 1118 | old_dentry->d_parent->d_name.name, old_dentry->d_name.name, |
| 1119 | new_dentry->d_parent->d_name.name, new_dentry->d_name.name); |
| 1120 | |
| 1121 | error = -EIO; |
| 1122 | lock_kernel(); |
| 1123 | if (!ncp_conn_valid(server)) |
| 1124 | goto out; |
| 1125 | |
| 1126 | ncp_age_dentry(server, old_dentry); |
| 1127 | ncp_age_dentry(server, new_dentry); |
| 1128 | |
| 1129 | old_len = sizeof(__old_name); |
| 1130 | error = ncp_io2vol(server, __old_name, &old_len, |
| 1131 | old_dentry->d_name.name, old_dentry->d_name.len, |
| 1132 | !ncp_preserve_case(old_dir)); |
| 1133 | if (error) |
| 1134 | goto out; |
| 1135 | |
| 1136 | new_len = sizeof(__new_name); |
| 1137 | error = ncp_io2vol(server, __new_name, &new_len, |
| 1138 | new_dentry->d_name.name, new_dentry->d_name.len, |
| 1139 | !ncp_preserve_case(new_dir)); |
| 1140 | if (error) |
| 1141 | goto out; |
| 1142 | |
| 1143 | error = ncp_ren_or_mov_file_or_subdir(server, old_dir, __old_name, |
| 1144 | new_dir, __new_name); |
| 1145 | #ifdef CONFIG_NCPFS_STRONG |
| 1146 | if ((error == 0x90 || error == 0x8B || error == -EACCES) && |
| 1147 | server->m.flags & NCP_MOUNT_STRONG) { /* RO */ |
| 1148 | error = ncp_force_rename(old_dir, old_dentry, __old_name, |
| 1149 | new_dir, new_dentry, __new_name); |
| 1150 | } |
| 1151 | #endif |
| 1152 | switch (error) { |
| 1153 | case 0x00: |
| 1154 | DPRINTK("ncp renamed %s -> %s.\n", |
| 1155 | old_dentry->d_name.name,new_dentry->d_name.name); |
| 1156 | break; |
| 1157 | case 0x9E: |
| 1158 | error = -ENAMETOOLONG; |
| 1159 | break; |
| 1160 | case 0xFF: |
| 1161 | error = -ENOENT; |
| 1162 | break; |
| 1163 | default: |
| 1164 | error = -EACCES; |
| 1165 | break; |
| 1166 | } |
| 1167 | out: |
| 1168 | unlock_kernel(); |
| 1169 | return error; |
| 1170 | } |
| 1171 | |
| 1172 | static int ncp_mknod(struct inode * dir, struct dentry *dentry, |
| 1173 | int mode, dev_t rdev) |
| 1174 | { |
| 1175 | if (!new_valid_dev(rdev)) |
| 1176 | return -EINVAL; |
| 1177 | if (ncp_is_nfs_extras(NCP_SERVER(dir), NCP_FINFO(dir)->volNumber)) { |
| 1178 | DPRINTK(KERN_DEBUG "ncp_mknod: mode = 0%o\n", mode); |
| 1179 | return ncp_create_new(dir, dentry, mode, rdev, 0); |
| 1180 | } |
| 1181 | return -EPERM; /* Strange, but true */ |
| 1182 | } |
| 1183 | |
| 1184 | /* The following routines are taken directly from msdos-fs */ |
| 1185 | |
| 1186 | /* Linear day numbers of the respective 1sts in non-leap years. */ |
| 1187 | |
| 1188 | static int day_n[] = |
| 1189 | {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, 0}; |
| 1190 | /* Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec */ |
| 1191 | |
| 1192 | |
| 1193 | extern struct timezone sys_tz; |
| 1194 | |
| 1195 | static int utc2local(int time) |
| 1196 | { |
| 1197 | return time - sys_tz.tz_minuteswest * 60; |
| 1198 | } |
| 1199 | |
| 1200 | static int local2utc(int time) |
| 1201 | { |
| 1202 | return time + sys_tz.tz_minuteswest * 60; |
| 1203 | } |
| 1204 | |
| 1205 | /* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */ |
| 1206 | int |
| 1207 | ncp_date_dos2unix(__le16 t, __le16 d) |
| 1208 | { |
| 1209 | unsigned short time = le16_to_cpu(t), date = le16_to_cpu(d); |
| 1210 | int month, year, secs; |
| 1211 | |
| 1212 | /* first subtract and mask after that... Otherwise, if |
| 1213 | date == 0, bad things happen */ |
| 1214 | month = ((date >> 5) - 1) & 15; |
| 1215 | year = date >> 9; |
| 1216 | secs = (time & 31) * 2 + 60 * ((time >> 5) & 63) + (time >> 11) * 3600 + |
| 1217 | 86400 * ((date & 31) - 1 + day_n[month] + (year / 4) + |
| 1218 | year * 365 - ((year & 3) == 0 && month < 2 ? 1 : 0) + 3653); |
| 1219 | /* days since 1.1.70 plus 80's leap day */ |
| 1220 | return local2utc(secs); |
| 1221 | } |
| 1222 | |
| 1223 | |
| 1224 | /* Convert linear UNIX date to a MS-DOS time/date pair. */ |
| 1225 | void |
| 1226 | ncp_date_unix2dos(int unix_date, __le16 *time, __le16 *date) |
| 1227 | { |
| 1228 | int day, year, nl_day, month; |
| 1229 | |
| 1230 | unix_date = utc2local(unix_date); |
| 1231 | *time = cpu_to_le16( |
| 1232 | (unix_date % 60) / 2 + (((unix_date / 60) % 60) << 5) + |
| 1233 | (((unix_date / 3600) % 24) << 11)); |
| 1234 | day = unix_date / 86400 - 3652; |
| 1235 | year = day / 365; |
| 1236 | if ((year + 3) / 4 + 365 * year > day) |
| 1237 | year--; |
| 1238 | day -= (year + 3) / 4 + 365 * year; |
| 1239 | if (day == 59 && !(year & 3)) { |
| 1240 | nl_day = day; |
| 1241 | month = 2; |
| 1242 | } else { |
| 1243 | nl_day = (year & 3) || day <= 59 ? day : day - 1; |
| 1244 | for (month = 0; month < 12; month++) |
| 1245 | if (day_n[month] > nl_day) |
| 1246 | break; |
| 1247 | } |
| 1248 | *date = cpu_to_le16(nl_day - day_n[month - 1] + 1 + (month << 5) + (year << 9)); |
| 1249 | } |