Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * proc.c |
| 3 | * |
| 4 | * Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke |
| 5 | * Copyright (C) 1997 by Volker Lendecke |
| 6 | * |
| 7 | * Please add a note about your changes to smbfs in the ChangeLog file. |
| 8 | */ |
| 9 | |
| 10 | #include <linux/types.h> |
Randy Dunlap | 16f7e0f | 2006-01-11 12:17:46 -0800 | [diff] [blame] | 11 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/errno.h> |
| 13 | #include <linux/slab.h> |
| 14 | #include <linux/fs.h> |
| 15 | #include <linux/file.h> |
| 16 | #include <linux/stat.h> |
| 17 | #include <linux/fcntl.h> |
| 18 | #include <linux/dcache.h> |
| 19 | #include <linux/dirent.h> |
| 20 | #include <linux/nls.h> |
| 21 | #include <linux/smp_lock.h> |
| 22 | #include <linux/net.h> |
| 23 | #include <linux/vfs.h> |
| 24 | #include <linux/smb_fs.h> |
| 25 | #include <linux/smbno.h> |
| 26 | #include <linux/smb_mount.h> |
| 27 | |
| 28 | #include <net/sock.h> |
| 29 | |
| 30 | #include <asm/string.h> |
| 31 | #include <asm/div64.h> |
| 32 | |
| 33 | #include "smb_debug.h" |
| 34 | #include "proto.h" |
| 35 | #include "request.h" |
| 36 | |
| 37 | |
| 38 | /* Features. Undefine if they cause problems, this should perhaps be a |
| 39 | config option. */ |
| 40 | #define SMBFS_POSIX_UNLINK 1 |
| 41 | |
| 42 | /* Allow smb_retry to be interrupted. */ |
| 43 | #define SMB_RETRY_INTR |
| 44 | |
| 45 | #define SMB_VWV(packet) ((packet) + SMB_HEADER_LEN) |
| 46 | #define SMB_CMD(packet) (*(packet+8)) |
| 47 | #define SMB_WCT(packet) (*(packet+SMB_HEADER_LEN - 1)) |
| 48 | |
| 49 | #define SMB_DIRINFO_SIZE 43 |
| 50 | #define SMB_STATUS_SIZE 21 |
| 51 | |
| 52 | #define SMB_ST_BLKSIZE (PAGE_SIZE) |
| 53 | #define SMB_ST_BLKSHIFT (PAGE_SHIFT) |
| 54 | |
| 55 | static struct smb_ops smb_ops_core; |
| 56 | static struct smb_ops smb_ops_os2; |
| 57 | static struct smb_ops smb_ops_win95; |
| 58 | static struct smb_ops smb_ops_winNT; |
| 59 | static struct smb_ops smb_ops_unix; |
| 60 | static struct smb_ops smb_ops_null; |
| 61 | |
| 62 | static void |
| 63 | smb_init_dirent(struct smb_sb_info *server, struct smb_fattr *fattr); |
| 64 | static void |
| 65 | smb_finish_dirent(struct smb_sb_info *server, struct smb_fattr *fattr); |
| 66 | static int |
| 67 | smb_proc_getattr_core(struct smb_sb_info *server, struct dentry *dir, |
| 68 | struct smb_fattr *fattr); |
| 69 | static int |
| 70 | smb_proc_getattr_ff(struct smb_sb_info *server, struct dentry *dentry, |
| 71 | struct smb_fattr *fattr); |
| 72 | static int |
| 73 | smb_proc_setattr_core(struct smb_sb_info *server, struct dentry *dentry, |
| 74 | u16 attr); |
| 75 | static int |
| 76 | smb_proc_setattr_ext(struct smb_sb_info *server, |
| 77 | struct inode *inode, struct smb_fattr *fattr); |
| 78 | static int |
| 79 | smb_proc_query_cifsunix(struct smb_sb_info *server); |
| 80 | static void |
| 81 | install_ops(struct smb_ops *dst, struct smb_ops *src); |
| 82 | |
| 83 | |
| 84 | static void |
| 85 | str_upper(char *name, int len) |
| 86 | { |
| 87 | while (len--) |
| 88 | { |
| 89 | if (*name >= 'a' && *name <= 'z') |
| 90 | *name -= ('a' - 'A'); |
| 91 | name++; |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | #if 0 |
| 96 | static void |
| 97 | str_lower(char *name, int len) |
| 98 | { |
| 99 | while (len--) |
| 100 | { |
| 101 | if (*name >= 'A' && *name <= 'Z') |
| 102 | *name += ('a' - 'A'); |
| 103 | name++; |
| 104 | } |
| 105 | } |
| 106 | #endif |
| 107 | |
| 108 | /* reverse a string inline. This is used by the dircache walking routines */ |
| 109 | static void reverse_string(char *buf, int len) |
| 110 | { |
| 111 | char c; |
| 112 | char *end = buf+len-1; |
| 113 | |
| 114 | while(buf < end) { |
| 115 | c = *buf; |
| 116 | *(buf++) = *end; |
| 117 | *(end--) = c; |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | /* no conversion, just a wrapper for memcpy. */ |
| 122 | static int convert_memcpy(unsigned char *output, int olen, |
| 123 | const unsigned char *input, int ilen, |
| 124 | struct nls_table *nls_from, |
| 125 | struct nls_table *nls_to) |
| 126 | { |
| 127 | if (olen < ilen) |
| 128 | return -ENAMETOOLONG; |
| 129 | memcpy(output, input, ilen); |
| 130 | return ilen; |
| 131 | } |
| 132 | |
| 133 | static inline int write_char(unsigned char ch, char *output, int olen) |
| 134 | { |
| 135 | if (olen < 4) |
| 136 | return -ENAMETOOLONG; |
| 137 | sprintf(output, ":x%02x", ch); |
| 138 | return 4; |
| 139 | } |
| 140 | |
| 141 | static inline int write_unichar(wchar_t ch, char *output, int olen) |
| 142 | { |
| 143 | if (olen < 5) |
| 144 | return -ENAMETOOLONG; |
| 145 | sprintf(output, ":%04x", ch); |
| 146 | return 5; |
| 147 | } |
| 148 | |
| 149 | /* convert from one "codepage" to another (possibly being utf8). */ |
| 150 | static int convert_cp(unsigned char *output, int olen, |
| 151 | const unsigned char *input, int ilen, |
| 152 | struct nls_table *nls_from, |
| 153 | struct nls_table *nls_to) |
| 154 | { |
| 155 | int len = 0; |
| 156 | int n; |
| 157 | wchar_t ch; |
| 158 | |
| 159 | while (ilen > 0) { |
| 160 | /* convert by changing to unicode and back to the new cp */ |
| 161 | n = nls_from->char2uni(input, ilen, &ch); |
| 162 | if (n == -EINVAL) { |
| 163 | ilen--; |
| 164 | n = write_char(*input++, output, olen); |
| 165 | if (n < 0) |
| 166 | goto fail; |
| 167 | output += n; |
| 168 | olen -= n; |
| 169 | len += n; |
| 170 | continue; |
| 171 | } else if (n < 0) |
| 172 | goto fail; |
| 173 | input += n; |
| 174 | ilen -= n; |
| 175 | |
| 176 | n = nls_to->uni2char(ch, output, olen); |
| 177 | if (n == -EINVAL) |
| 178 | n = write_unichar(ch, output, olen); |
| 179 | if (n < 0) |
| 180 | goto fail; |
| 181 | output += n; |
| 182 | olen -= n; |
| 183 | |
| 184 | len += n; |
| 185 | } |
| 186 | return len; |
| 187 | fail: |
| 188 | return n; |
| 189 | } |
| 190 | |
| 191 | /* ----------------------------------------------------------- */ |
| 192 | |
| 193 | /* |
| 194 | * nls_unicode |
| 195 | * |
| 196 | * This encodes/decodes little endian unicode format |
| 197 | */ |
| 198 | |
| 199 | static int uni2char(wchar_t uni, unsigned char *out, int boundlen) |
| 200 | { |
| 201 | if (boundlen < 2) |
| 202 | return -EINVAL; |
| 203 | *out++ = uni & 0xff; |
| 204 | *out++ = uni >> 8; |
| 205 | return 2; |
| 206 | } |
| 207 | |
| 208 | static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni) |
| 209 | { |
| 210 | if (boundlen < 2) |
| 211 | return -EINVAL; |
| 212 | *uni = (rawstring[1] << 8) | rawstring[0]; |
| 213 | return 2; |
| 214 | } |
| 215 | |
| 216 | static struct nls_table unicode_table = { |
| 217 | .charset = "unicode", |
| 218 | .uni2char = uni2char, |
| 219 | .char2uni = char2uni, |
| 220 | }; |
| 221 | |
| 222 | /* ----------------------------------------------------------- */ |
| 223 | |
| 224 | static int setcodepage(struct nls_table **p, char *name) |
| 225 | { |
| 226 | struct nls_table *nls; |
| 227 | |
| 228 | if (!name || !*name) { |
| 229 | nls = NULL; |
| 230 | } else if ( (nls = load_nls(name)) == NULL) { |
| 231 | printk (KERN_ERR "smbfs: failed to load nls '%s'\n", name); |
| 232 | return -EINVAL; |
| 233 | } |
| 234 | |
| 235 | /* if already set, unload the previous one. */ |
| 236 | if (*p && *p != &unicode_table) |
| 237 | unload_nls(*p); |
| 238 | *p = nls; |
| 239 | |
| 240 | return 0; |
| 241 | } |
| 242 | |
| 243 | /* Handles all changes to codepage settings. */ |
| 244 | int smb_setcodepage(struct smb_sb_info *server, struct smb_nls_codepage *cp) |
| 245 | { |
| 246 | int n = 0; |
| 247 | |
| 248 | smb_lock_server(server); |
| 249 | |
| 250 | /* Don't load any nls_* at all, if no remote is requested */ |
| 251 | if (!*cp->remote_name) |
| 252 | goto out; |
| 253 | |
| 254 | /* local */ |
| 255 | n = setcodepage(&server->local_nls, cp->local_name); |
| 256 | if (n != 0) |
| 257 | goto out; |
| 258 | |
| 259 | /* remote */ |
| 260 | if (!strcmp(cp->remote_name, "unicode")) { |
| 261 | server->remote_nls = &unicode_table; |
| 262 | } else { |
| 263 | n = setcodepage(&server->remote_nls, cp->remote_name); |
| 264 | if (n != 0) |
| 265 | setcodepage(&server->local_nls, NULL); |
| 266 | } |
| 267 | |
| 268 | out: |
| 269 | if (server->local_nls != NULL && server->remote_nls != NULL) |
| 270 | server->ops->convert = convert_cp; |
| 271 | else |
| 272 | server->ops->convert = convert_memcpy; |
| 273 | |
| 274 | smb_unlock_server(server); |
| 275 | return n; |
| 276 | } |
| 277 | |
| 278 | |
| 279 | /*****************************************************************************/ |
| 280 | /* */ |
| 281 | /* Encoding/Decoding section */ |
| 282 | /* */ |
| 283 | /*****************************************************************************/ |
| 284 | |
| 285 | static __u8 * |
| 286 | smb_encode_smb_length(__u8 * p, __u32 len) |
| 287 | { |
| 288 | *p = 0; |
| 289 | *(p+1) = 0; |
| 290 | *(p+2) = (len & 0xFF00) >> 8; |
| 291 | *(p+3) = (len & 0xFF); |
| 292 | if (len > 0xFFFF) |
| 293 | { |
| 294 | *(p+1) = 1; |
| 295 | } |
| 296 | return p + 4; |
| 297 | } |
| 298 | |
| 299 | /* |
| 300 | * smb_build_path: build the path to entry and name storing it in buf. |
| 301 | * The path returned will have the trailing '\0'. |
| 302 | */ |
| 303 | static int smb_build_path(struct smb_sb_info *server, unsigned char *buf, |
| 304 | int maxlen, |
| 305 | struct dentry *entry, struct qstr *name) |
| 306 | { |
| 307 | unsigned char *path = buf; |
| 308 | int len; |
| 309 | int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE) != 0; |
| 310 | |
| 311 | if (maxlen < (2<<unicode)) |
| 312 | return -ENAMETOOLONG; |
| 313 | |
| 314 | if (maxlen > SMB_MAXPATHLEN + 1) |
| 315 | maxlen = SMB_MAXPATHLEN + 1; |
| 316 | |
| 317 | if (entry == NULL) |
| 318 | goto test_name_and_out; |
| 319 | |
| 320 | /* |
| 321 | * If IS_ROOT, we have to do no walking at all. |
| 322 | */ |
| 323 | if (IS_ROOT(entry) && !name) { |
| 324 | *path++ = '\\'; |
| 325 | if (unicode) *path++ = '\0'; |
| 326 | *path++ = '\0'; |
| 327 | if (unicode) *path++ = '\0'; |
| 328 | return path-buf; |
| 329 | } |
| 330 | |
| 331 | /* |
| 332 | * Build the path string walking the tree backward from end to ROOT |
| 333 | * and store it in reversed order [see reverse_string()] |
| 334 | */ |
| 335 | dget(entry); |
| 336 | spin_lock(&entry->d_lock); |
| 337 | while (!IS_ROOT(entry)) { |
| 338 | struct dentry *parent; |
| 339 | |
| 340 | if (maxlen < (3<<unicode)) { |
| 341 | spin_unlock(&entry->d_lock); |
| 342 | dput(entry); |
| 343 | return -ENAMETOOLONG; |
| 344 | } |
| 345 | |
| 346 | len = server->ops->convert(path, maxlen-2, |
| 347 | entry->d_name.name, entry->d_name.len, |
| 348 | server->local_nls, server->remote_nls); |
| 349 | if (len < 0) { |
| 350 | spin_unlock(&entry->d_lock); |
| 351 | dput(entry); |
| 352 | return len; |
| 353 | } |
| 354 | reverse_string(path, len); |
| 355 | path += len; |
| 356 | if (unicode) { |
| 357 | /* Note: reverse order */ |
| 358 | *path++ = '\0'; |
| 359 | maxlen--; |
| 360 | } |
| 361 | *path++ = '\\'; |
| 362 | maxlen -= len+1; |
| 363 | |
| 364 | parent = entry->d_parent; |
| 365 | dget(parent); |
| 366 | spin_unlock(&entry->d_lock); |
| 367 | dput(entry); |
| 368 | entry = parent; |
| 369 | spin_lock(&entry->d_lock); |
| 370 | } |
| 371 | spin_unlock(&entry->d_lock); |
| 372 | dput(entry); |
| 373 | reverse_string(buf, path-buf); |
| 374 | |
| 375 | /* maxlen has space for at least one char */ |
| 376 | test_name_and_out: |
| 377 | if (name) { |
| 378 | if (maxlen < (3<<unicode)) |
| 379 | return -ENAMETOOLONG; |
| 380 | *path++ = '\\'; |
| 381 | if (unicode) { |
| 382 | *path++ = '\0'; |
| 383 | maxlen--; |
| 384 | } |
| 385 | len = server->ops->convert(path, maxlen-2, |
| 386 | name->name, name->len, |
| 387 | server->local_nls, server->remote_nls); |
| 388 | if (len < 0) |
| 389 | return len; |
| 390 | path += len; |
| 391 | maxlen -= len+1; |
| 392 | } |
| 393 | /* maxlen has space for at least one char */ |
| 394 | *path++ = '\0'; |
| 395 | if (unicode) *path++ = '\0'; |
| 396 | return path-buf; |
| 397 | } |
| 398 | |
| 399 | static int smb_encode_path(struct smb_sb_info *server, char *buf, int maxlen, |
| 400 | struct dentry *dir, struct qstr *name) |
| 401 | { |
| 402 | int result; |
| 403 | |
| 404 | result = smb_build_path(server, buf, maxlen, dir, name); |
| 405 | if (result < 0) |
| 406 | goto out; |
| 407 | if (server->opt.protocol <= SMB_PROTOCOL_COREPLUS) |
| 408 | str_upper(buf, result); |
| 409 | out: |
| 410 | return result; |
| 411 | } |
| 412 | |
| 413 | /* encode_path for non-trans2 request SMBs */ |
| 414 | static int smb_simple_encode_path(struct smb_request *req, char **p, |
| 415 | struct dentry * entry, struct qstr * name) |
| 416 | { |
| 417 | struct smb_sb_info *server = req->rq_server; |
| 418 | char *s = *p; |
| 419 | int res; |
| 420 | int maxlen = ((char *)req->rq_buffer + req->rq_bufsize) - s; |
| 421 | int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE); |
| 422 | |
| 423 | if (!maxlen) |
| 424 | return -ENAMETOOLONG; |
| 425 | *s++ = 4; /* ASCII data format */ |
| 426 | |
| 427 | /* |
| 428 | * SMB Unicode strings must be 16bit aligned relative the start of the |
| 429 | * packet. If they are not they must be padded with 0. |
| 430 | */ |
| 431 | if (unicode) { |
| 432 | int align = s - (char *)req->rq_buffer; |
| 433 | if (!(align & 1)) { |
| 434 | *s++ = '\0'; |
| 435 | maxlen--; |
| 436 | } |
| 437 | } |
| 438 | |
| 439 | res = smb_encode_path(server, s, maxlen-1, entry, name); |
| 440 | if (res < 0) |
| 441 | return res; |
| 442 | *p = s + res; |
| 443 | return 0; |
| 444 | } |
| 445 | |
| 446 | /* The following are taken directly from msdos-fs */ |
| 447 | |
| 448 | /* Linear day numbers of the respective 1sts in non-leap years. */ |
| 449 | |
| 450 | static int day_n[] = |
| 451 | {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, 0}; |
| 452 | /* JanFebMarApr May Jun Jul Aug Sep Oct Nov Dec */ |
| 453 | |
| 454 | |
| 455 | static time_t |
| 456 | utc2local(struct smb_sb_info *server, time_t time) |
| 457 | { |
| 458 | return time - server->opt.serverzone*60; |
| 459 | } |
| 460 | |
| 461 | static time_t |
| 462 | local2utc(struct smb_sb_info *server, time_t time) |
| 463 | { |
| 464 | return time + server->opt.serverzone*60; |
| 465 | } |
| 466 | |
| 467 | /* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */ |
| 468 | |
| 469 | static time_t |
| 470 | date_dos2unix(struct smb_sb_info *server, __u16 date, __u16 time) |
| 471 | { |
| 472 | int month, year; |
| 473 | time_t secs; |
| 474 | |
| 475 | /* first subtract and mask after that... Otherwise, if |
| 476 | date == 0, bad things happen */ |
| 477 | month = ((date >> 5) - 1) & 15; |
| 478 | year = date >> 9; |
| 479 | secs = (time & 31) * 2 + 60 * ((time >> 5) & 63) + (time >> 11) * 3600 + 86400 * |
| 480 | ((date & 31) - 1 + day_n[month] + (year / 4) + year * 365 - ((year & 3) == 0 && |
| 481 | month < 2 ? 1 : 0) + 3653); |
| 482 | /* days since 1.1.70 plus 80's leap day */ |
| 483 | return local2utc(server, secs); |
| 484 | } |
| 485 | |
| 486 | |
| 487 | /* Convert linear UNIX date to a MS-DOS time/date pair. */ |
| 488 | |
| 489 | static void |
| 490 | date_unix2dos(struct smb_sb_info *server, |
| 491 | int unix_date, __u16 *date, __u16 *time) |
| 492 | { |
| 493 | int day, year, nl_day, month; |
| 494 | |
| 495 | unix_date = utc2local(server, unix_date); |
| 496 | if (unix_date < 315532800) |
| 497 | unix_date = 315532800; |
| 498 | |
| 499 | *time = (unix_date % 60) / 2 + |
| 500 | (((unix_date / 60) % 60) << 5) + |
| 501 | (((unix_date / 3600) % 24) << 11); |
| 502 | |
| 503 | day = unix_date / 86400 - 3652; |
| 504 | year = day / 365; |
| 505 | if ((year + 3) / 4 + 365 * year > day) |
| 506 | year--; |
| 507 | day -= (year + 3) / 4 + 365 * year; |
| 508 | if (day == 59 && !(year & 3)) { |
| 509 | nl_day = day; |
| 510 | month = 2; |
| 511 | } else { |
| 512 | nl_day = (year & 3) || day <= 59 ? day : day - 1; |
| 513 | for (month = 0; month < 12; month++) |
| 514 | if (day_n[month] > nl_day) |
| 515 | break; |
| 516 | } |
| 517 | *date = nl_day - day_n[month - 1] + 1 + (month << 5) + (year << 9); |
| 518 | } |
| 519 | |
| 520 | /* The following are taken from fs/ntfs/util.c */ |
| 521 | |
| 522 | #define NTFS_TIME_OFFSET ((u64)(369*365 + 89) * 24 * 3600 * 10000000) |
| 523 | |
| 524 | /* |
| 525 | * Convert the NT UTC (based 1601-01-01, in hundred nanosecond units) |
| 526 | * into Unix UTC (based 1970-01-01, in seconds). |
| 527 | */ |
| 528 | static struct timespec |
| 529 | smb_ntutc2unixutc(u64 ntutc) |
| 530 | { |
| 531 | struct timespec ts; |
| 532 | /* FIXME: what about the timezone difference? */ |
| 533 | /* Subtract the NTFS time offset, then convert to 1s intervals. */ |
| 534 | u64 t = ntutc - NTFS_TIME_OFFSET; |
| 535 | ts.tv_nsec = do_div(t, 10000000) * 100; |
| 536 | ts.tv_sec = t; |
| 537 | return ts; |
| 538 | } |
| 539 | |
| 540 | /* Convert the Unix UTC into NT time */ |
| 541 | static u64 |
| 542 | smb_unixutc2ntutc(struct timespec ts) |
| 543 | { |
| 544 | /* Note: timezone conversion is probably wrong. */ |
| 545 | /* return ((u64)utc2local(server, t)) * 10000000 + NTFS_TIME_OFFSET; */ |
| 546 | return ((u64)ts.tv_sec) * 10000000 + ts.tv_nsec/100 + NTFS_TIME_OFFSET; |
| 547 | } |
| 548 | |
| 549 | #define MAX_FILE_MODE 6 |
| 550 | static mode_t file_mode[] = { |
| 551 | S_IFREG, S_IFDIR, S_IFLNK, S_IFCHR, S_IFBLK, S_IFIFO, S_IFSOCK |
| 552 | }; |
| 553 | |
| 554 | static int smb_filetype_to_mode(u32 filetype) |
| 555 | { |
| 556 | if (filetype > MAX_FILE_MODE) { |
| 557 | PARANOIA("Filetype out of range: %d\n", filetype); |
| 558 | return S_IFREG; |
| 559 | } |
| 560 | return file_mode[filetype]; |
| 561 | } |
| 562 | |
| 563 | static u32 smb_filetype_from_mode(int mode) |
| 564 | { |
| 565 | if (S_ISREG(mode)) |
| 566 | return UNIX_TYPE_FILE; |
| 567 | if (S_ISDIR(mode)) |
| 568 | return UNIX_TYPE_DIR; |
| 569 | if (S_ISLNK(mode)) |
| 570 | return UNIX_TYPE_SYMLINK; |
| 571 | if (S_ISCHR(mode)) |
| 572 | return UNIX_TYPE_CHARDEV; |
| 573 | if (S_ISBLK(mode)) |
| 574 | return UNIX_TYPE_BLKDEV; |
| 575 | if (S_ISFIFO(mode)) |
| 576 | return UNIX_TYPE_FIFO; |
| 577 | if (S_ISSOCK(mode)) |
| 578 | return UNIX_TYPE_SOCKET; |
| 579 | return UNIX_TYPE_UNKNOWN; |
| 580 | } |
| 581 | |
| 582 | |
| 583 | /*****************************************************************************/ |
| 584 | /* */ |
| 585 | /* Support section. */ |
| 586 | /* */ |
| 587 | /*****************************************************************************/ |
| 588 | |
| 589 | __u32 |
| 590 | smb_len(__u8 * p) |
| 591 | { |
| 592 | return ((*(p+1) & 0x1) << 16L) | (*(p+2) << 8L) | *(p+3); |
| 593 | } |
| 594 | |
| 595 | static __u16 |
| 596 | smb_bcc(__u8 * packet) |
| 597 | { |
| 598 | int pos = SMB_HEADER_LEN + SMB_WCT(packet) * sizeof(__u16); |
| 599 | return WVAL(packet, pos); |
| 600 | } |
| 601 | |
| 602 | /* smb_valid_packet: We check if packet fulfills the basic |
| 603 | requirements of a smb packet */ |
| 604 | |
| 605 | static int |
| 606 | smb_valid_packet(__u8 * packet) |
| 607 | { |
| 608 | return (packet[4] == 0xff |
| 609 | && packet[5] == 'S' |
| 610 | && packet[6] == 'M' |
| 611 | && packet[7] == 'B' |
| 612 | && (smb_len(packet) + 4 == SMB_HEADER_LEN |
| 613 | + SMB_WCT(packet) * 2 + smb_bcc(packet))); |
| 614 | } |
| 615 | |
| 616 | /* smb_verify: We check if we got the answer we expected, and if we |
| 617 | got enough data. If bcc == -1, we don't care. */ |
| 618 | |
| 619 | static int |
| 620 | smb_verify(__u8 * packet, int command, int wct, int bcc) |
| 621 | { |
| 622 | if (SMB_CMD(packet) != command) |
| 623 | goto bad_command; |
| 624 | if (SMB_WCT(packet) < wct) |
| 625 | goto bad_wct; |
| 626 | if (bcc != -1 && smb_bcc(packet) < bcc) |
| 627 | goto bad_bcc; |
| 628 | return 0; |
| 629 | |
| 630 | bad_command: |
| 631 | printk(KERN_ERR "smb_verify: command=%x, SMB_CMD=%x??\n", |
| 632 | command, SMB_CMD(packet)); |
| 633 | goto fail; |
| 634 | bad_wct: |
| 635 | printk(KERN_ERR "smb_verify: command=%x, wct=%d, SMB_WCT=%d??\n", |
| 636 | command, wct, SMB_WCT(packet)); |
| 637 | goto fail; |
| 638 | bad_bcc: |
| 639 | printk(KERN_ERR "smb_verify: command=%x, bcc=%d, SMB_BCC=%d??\n", |
| 640 | command, bcc, smb_bcc(packet)); |
| 641 | fail: |
| 642 | return -EIO; |
| 643 | } |
| 644 | |
| 645 | /* |
| 646 | * Returns the maximum read or write size for the "payload". Making all of the |
| 647 | * packet fit within the negotiated max_xmit size. |
| 648 | * |
| 649 | * N.B. Since this value is usually computed before locking the server, |
| 650 | * the server's packet size must never be decreased! |
| 651 | */ |
| 652 | static inline int |
| 653 | smb_get_xmitsize(struct smb_sb_info *server, int overhead) |
| 654 | { |
| 655 | return server->opt.max_xmit - overhead; |
| 656 | } |
| 657 | |
| 658 | /* |
| 659 | * Calculate the maximum read size |
| 660 | */ |
| 661 | int |
| 662 | smb_get_rsize(struct smb_sb_info *server) |
| 663 | { |
| 664 | /* readX has 12 parameters, read has 5 */ |
| 665 | int overhead = SMB_HEADER_LEN + 12 * sizeof(__u16) + 2 + 1 + 2; |
| 666 | int size = smb_get_xmitsize(server, overhead); |
| 667 | |
| 668 | VERBOSE("xmit=%d, size=%d\n", server->opt.max_xmit, size); |
| 669 | |
| 670 | return size; |
| 671 | } |
| 672 | |
| 673 | /* |
| 674 | * Calculate the maximum write size |
| 675 | */ |
| 676 | int |
| 677 | smb_get_wsize(struct smb_sb_info *server) |
| 678 | { |
| 679 | /* writeX has 14 parameters, write has 5 */ |
| 680 | int overhead = SMB_HEADER_LEN + 14 * sizeof(__u16) + 2 + 1 + 2; |
| 681 | int size = smb_get_xmitsize(server, overhead); |
| 682 | |
| 683 | VERBOSE("xmit=%d, size=%d\n", server->opt.max_xmit, size); |
| 684 | |
| 685 | return size; |
| 686 | } |
| 687 | |
| 688 | /* |
| 689 | * Convert SMB error codes to -E... errno values. |
| 690 | */ |
| 691 | int |
| 692 | smb_errno(struct smb_request *req) |
| 693 | { |
| 694 | int errcls = req->rq_rcls; |
| 695 | int error = req->rq_err; |
| 696 | char *class = "Unknown"; |
| 697 | |
| 698 | VERBOSE("errcls %d code %d from command 0x%x\n", |
| 699 | errcls, error, SMB_CMD(req->rq_header)); |
| 700 | |
| 701 | if (errcls == ERRDOS) { |
| 702 | switch (error) { |
| 703 | case ERRbadfunc: |
| 704 | return -EINVAL; |
| 705 | case ERRbadfile: |
| 706 | case ERRbadpath: |
| 707 | return -ENOENT; |
| 708 | case ERRnofids: |
| 709 | return -EMFILE; |
| 710 | case ERRnoaccess: |
| 711 | return -EACCES; |
| 712 | case ERRbadfid: |
| 713 | return -EBADF; |
| 714 | case ERRbadmcb: |
| 715 | return -EREMOTEIO; |
| 716 | case ERRnomem: |
| 717 | return -ENOMEM; |
| 718 | case ERRbadmem: |
| 719 | return -EFAULT; |
| 720 | case ERRbadenv: |
| 721 | case ERRbadformat: |
| 722 | return -EREMOTEIO; |
| 723 | case ERRbadaccess: |
| 724 | return -EACCES; |
| 725 | case ERRbaddata: |
| 726 | return -E2BIG; |
| 727 | case ERRbaddrive: |
| 728 | return -ENXIO; |
| 729 | case ERRremcd: |
| 730 | return -EREMOTEIO; |
| 731 | case ERRdiffdevice: |
| 732 | return -EXDEV; |
| 733 | case ERRnofiles: |
| 734 | return -ENOENT; |
| 735 | case ERRbadshare: |
| 736 | return -ETXTBSY; |
| 737 | case ERRlock: |
| 738 | return -EDEADLK; |
| 739 | case ERRfilexists: |
| 740 | return -EEXIST; |
| 741 | case ERROR_INVALID_PARAMETER: |
| 742 | return -EINVAL; |
| 743 | case ERROR_DISK_FULL: |
| 744 | return -ENOSPC; |
| 745 | case ERROR_INVALID_NAME: |
| 746 | return -ENOENT; |
| 747 | case ERROR_DIR_NOT_EMPTY: |
| 748 | return -ENOTEMPTY; |
| 749 | case ERROR_NOT_LOCKED: |
| 750 | return -ENOLCK; |
| 751 | case ERROR_ALREADY_EXISTS: |
| 752 | return -EEXIST; |
| 753 | default: |
| 754 | class = "ERRDOS"; |
| 755 | goto err_unknown; |
| 756 | } |
| 757 | } else if (errcls == ERRSRV) { |
| 758 | switch (error) { |
| 759 | /* N.B. This is wrong ... EIO ? */ |
| 760 | case ERRerror: |
| 761 | return -ENFILE; |
| 762 | case ERRbadpw: |
| 763 | return -EINVAL; |
| 764 | case ERRbadtype: |
| 765 | case ERRtimeout: |
| 766 | return -EIO; |
| 767 | case ERRaccess: |
| 768 | return -EACCES; |
| 769 | /* |
| 770 | * This is a fatal error, as it means the "tree ID" |
| 771 | * for this connection is no longer valid. We map |
| 772 | * to a special error code and get a new connection. |
| 773 | */ |
| 774 | case ERRinvnid: |
| 775 | return -EBADSLT; |
| 776 | default: |
| 777 | class = "ERRSRV"; |
| 778 | goto err_unknown; |
| 779 | } |
| 780 | } else if (errcls == ERRHRD) { |
| 781 | switch (error) { |
| 782 | case ERRnowrite: |
| 783 | return -EROFS; |
| 784 | case ERRbadunit: |
| 785 | return -ENODEV; |
| 786 | case ERRnotready: |
| 787 | return -EUCLEAN; |
| 788 | case ERRbadcmd: |
| 789 | case ERRdata: |
| 790 | return -EIO; |
| 791 | case ERRbadreq: |
| 792 | return -ERANGE; |
| 793 | case ERRbadshare: |
| 794 | return -ETXTBSY; |
| 795 | case ERRlock: |
| 796 | return -EDEADLK; |
| 797 | case ERRdiskfull: |
| 798 | return -ENOSPC; |
| 799 | default: |
| 800 | class = "ERRHRD"; |
| 801 | goto err_unknown; |
| 802 | } |
| 803 | } else if (errcls == ERRCMD) { |
| 804 | class = "ERRCMD"; |
| 805 | } else if (errcls == SUCCESS) { |
| 806 | return 0; /* This is the only valid 0 return */ |
| 807 | } |
| 808 | |
| 809 | err_unknown: |
| 810 | printk(KERN_ERR "smb_errno: class %s, code %d from command 0x%x\n", |
| 811 | class, error, SMB_CMD(req->rq_header)); |
| 812 | return -EIO; |
| 813 | } |
| 814 | |
| 815 | /* smb_request_ok: We expect the server to be locked. Then we do the |
| 816 | request and check the answer completely. When smb_request_ok |
| 817 | returns 0, you can be quite sure that everything went well. When |
| 818 | the answer is <=0, the returned number is a valid unix errno. */ |
| 819 | |
| 820 | static int |
| 821 | smb_request_ok(struct smb_request *req, int command, int wct, int bcc) |
| 822 | { |
| 823 | int result; |
| 824 | |
| 825 | req->rq_resp_wct = wct; |
| 826 | req->rq_resp_bcc = bcc; |
| 827 | |
| 828 | result = smb_add_request(req); |
| 829 | if (result != 0) { |
| 830 | DEBUG1("smb_request failed\n"); |
| 831 | goto out; |
| 832 | } |
| 833 | |
| 834 | if (smb_valid_packet(req->rq_header) != 0) { |
| 835 | PARANOIA("invalid packet!\n"); |
| 836 | goto out; |
| 837 | } |
| 838 | |
| 839 | result = smb_verify(req->rq_header, command, wct, bcc); |
| 840 | |
| 841 | out: |
| 842 | return result; |
| 843 | } |
| 844 | |
| 845 | /* |
| 846 | * This implements the NEWCONN ioctl. It installs the server pid, |
| 847 | * sets server->state to CONN_VALID, and wakes up the waiting process. |
| 848 | */ |
| 849 | int |
| 850 | smb_newconn(struct smb_sb_info *server, struct smb_conn_opt *opt) |
| 851 | { |
| 852 | struct file *filp; |
| 853 | struct sock *sk; |
| 854 | int error; |
| 855 | |
| 856 | VERBOSE("fd=%d, pid=%d\n", opt->fd, current->pid); |
| 857 | |
| 858 | smb_lock_server(server); |
| 859 | |
| 860 | /* |
| 861 | * Make sure we don't already have a valid connection ... |
| 862 | */ |
| 863 | error = -EINVAL; |
| 864 | if (server->state == CONN_VALID) |
| 865 | goto out; |
| 866 | |
| 867 | error = -EACCES; |
| 868 | if (current->uid != server->mnt->mounted_uid && |
| 869 | !capable(CAP_SYS_ADMIN)) |
| 870 | goto out; |
| 871 | |
| 872 | error = -EBADF; |
| 873 | filp = fget(opt->fd); |
| 874 | if (!filp) |
| 875 | goto out; |
| 876 | if (!smb_valid_socket(filp->f_dentry->d_inode)) |
| 877 | goto out_putf; |
| 878 | |
| 879 | server->sock_file = filp; |
| 880 | server->conn_pid = current->pid; |
| 881 | server->opt = *opt; |
| 882 | server->generation += 1; |
| 883 | server->state = CONN_VALID; |
| 884 | error = 0; |
| 885 | |
| 886 | if (server->conn_error) { |
| 887 | /* |
| 888 | * conn_error is the returncode we originally decided to |
| 889 | * drop the old connection on. This message should be positive |
| 890 | * and not make people ask questions on why smbfs is printing |
| 891 | * error messages ... |
| 892 | */ |
| 893 | printk(KERN_INFO "SMB connection re-established (%d)\n", |
| 894 | server->conn_error); |
| 895 | server->conn_error = 0; |
| 896 | } |
| 897 | |
| 898 | /* |
| 899 | * Store the server in sock user_data (Only used by sunrpc) |
| 900 | */ |
| 901 | sk = SOCKET_I(filp->f_dentry->d_inode)->sk; |
| 902 | sk->sk_user_data = server; |
| 903 | |
| 904 | /* chain into the data_ready callback */ |
| 905 | server->data_ready = xchg(&sk->sk_data_ready, smb_data_ready); |
| 906 | |
| 907 | /* check if we have an old smbmount that uses seconds for the |
| 908 | serverzone */ |
| 909 | if (server->opt.serverzone > 12*60 || server->opt.serverzone < -12*60) |
| 910 | server->opt.serverzone /= 60; |
| 911 | |
| 912 | /* now that we have an established connection we can detect the server |
| 913 | type and enable bug workarounds */ |
| 914 | if (server->opt.protocol < SMB_PROTOCOL_LANMAN2) |
| 915 | install_ops(server->ops, &smb_ops_core); |
| 916 | else if (server->opt.protocol == SMB_PROTOCOL_LANMAN2) |
| 917 | install_ops(server->ops, &smb_ops_os2); |
| 918 | else if (server->opt.protocol == SMB_PROTOCOL_NT1 && |
| 919 | (server->opt.max_xmit < 0x1000) && |
| 920 | !(server->opt.capabilities & SMB_CAP_NT_SMBS)) { |
| 921 | /* FIXME: can we kill the WIN95 flag now? */ |
| 922 | server->mnt->flags |= SMB_MOUNT_WIN95; |
| 923 | VERBOSE("detected WIN95 server\n"); |
| 924 | install_ops(server->ops, &smb_ops_win95); |
| 925 | } else { |
| 926 | /* |
| 927 | * Samba has max_xmit 65535 |
| 928 | * NT4spX has max_xmit 4536 (or something like that) |
| 929 | * win2k has ... |
| 930 | */ |
| 931 | VERBOSE("detected NT1 (Samba, NT4/5) server\n"); |
| 932 | install_ops(server->ops, &smb_ops_winNT); |
| 933 | } |
| 934 | |
| 935 | /* FIXME: the win9x code wants to modify these ... (seek/trunc bug) */ |
| 936 | if (server->mnt->flags & SMB_MOUNT_OLDATTR) { |
| 937 | server->ops->getattr = smb_proc_getattr_core; |
| 938 | } else if (server->mnt->flags & SMB_MOUNT_DIRATTR) { |
| 939 | server->ops->getattr = smb_proc_getattr_ff; |
| 940 | } |
| 941 | |
| 942 | /* Decode server capabilities */ |
| 943 | if (server->opt.capabilities & SMB_CAP_LARGE_FILES) { |
| 944 | /* Should be ok to set this now, as no one can access the |
| 945 | mount until the connection has been established. */ |
| 946 | SB_of(server)->s_maxbytes = ~0ULL >> 1; |
| 947 | VERBOSE("LFS enabled\n"); |
| 948 | } |
| 949 | if (server->opt.capabilities & SMB_CAP_UNICODE) { |
| 950 | server->mnt->flags |= SMB_MOUNT_UNICODE; |
| 951 | VERBOSE("Unicode enabled\n"); |
| 952 | } else { |
| 953 | server->mnt->flags &= ~SMB_MOUNT_UNICODE; |
| 954 | } |
| 955 | #if 0 |
| 956 | /* flags we may test for other patches ... */ |
| 957 | if (server->opt.capabilities & SMB_CAP_LARGE_READX) { |
| 958 | VERBOSE("Large reads enabled\n"); |
| 959 | } |
| 960 | if (server->opt.capabilities & SMB_CAP_LARGE_WRITEX) { |
| 961 | VERBOSE("Large writes enabled\n"); |
| 962 | } |
| 963 | #endif |
| 964 | if (server->opt.capabilities & SMB_CAP_UNIX) { |
| 965 | struct inode *inode; |
| 966 | VERBOSE("Using UNIX CIFS extensions\n"); |
| 967 | install_ops(server->ops, &smb_ops_unix); |
| 968 | inode = SB_of(server)->s_root->d_inode; |
| 969 | if (inode) |
| 970 | inode->i_op = &smb_dir_inode_operations_unix; |
| 971 | } |
| 972 | |
| 973 | VERBOSE("protocol=%d, max_xmit=%d, pid=%d capabilities=0x%x\n", |
| 974 | server->opt.protocol, server->opt.max_xmit, server->conn_pid, |
| 975 | server->opt.capabilities); |
| 976 | |
| 977 | /* FIXME: this really should be done by smbmount. */ |
| 978 | if (server->opt.max_xmit > SMB_MAX_PACKET_SIZE) { |
| 979 | server->opt.max_xmit = SMB_MAX_PACKET_SIZE; |
| 980 | } |
| 981 | |
| 982 | smb_unlock_server(server); |
| 983 | smbiod_wake_up(); |
| 984 | if (server->opt.capabilities & SMB_CAP_UNIX) |
| 985 | smb_proc_query_cifsunix(server); |
| 986 | |
| 987 | server->conn_complete++; |
| 988 | wake_up_interruptible_all(&server->conn_wq); |
| 989 | return error; |
| 990 | |
| 991 | out: |
| 992 | smb_unlock_server(server); |
| 993 | smbiod_wake_up(); |
| 994 | return error; |
| 995 | |
| 996 | out_putf: |
| 997 | fput(filp); |
| 998 | goto out; |
| 999 | } |
| 1000 | |
| 1001 | /* smb_setup_header: We completely set up the packet. You only have to |
| 1002 | insert the command-specific fields */ |
| 1003 | |
| 1004 | __u8 * |
| 1005 | smb_setup_header(struct smb_request *req, __u8 command, __u16 wct, __u16 bcc) |
| 1006 | { |
| 1007 | __u32 xmit_len = SMB_HEADER_LEN + wct * sizeof(__u16) + bcc + 2; |
| 1008 | __u8 *p = req->rq_header; |
| 1009 | struct smb_sb_info *server = req->rq_server; |
| 1010 | |
| 1011 | p = smb_encode_smb_length(p, xmit_len - 4); |
| 1012 | |
| 1013 | *p++ = 0xff; |
| 1014 | *p++ = 'S'; |
| 1015 | *p++ = 'M'; |
| 1016 | *p++ = 'B'; |
| 1017 | *p++ = command; |
| 1018 | |
| 1019 | memset(p, '\0', 19); |
| 1020 | p += 19; |
| 1021 | p += 8; |
| 1022 | |
| 1023 | if (server->opt.protocol > SMB_PROTOCOL_CORE) { |
| 1024 | int flags = SMB_FLAGS_CASELESS_PATHNAMES; |
| 1025 | int flags2 = SMB_FLAGS2_LONG_PATH_COMPONENTS | |
| 1026 | SMB_FLAGS2_EXTENDED_ATTRIBUTES; /* EA? not really ... */ |
| 1027 | |
| 1028 | *(req->rq_header + smb_flg) = flags; |
| 1029 | if (server->mnt->flags & SMB_MOUNT_UNICODE) |
| 1030 | flags2 |= SMB_FLAGS2_UNICODE_STRINGS; |
| 1031 | WSET(req->rq_header, smb_flg2, flags2); |
| 1032 | } |
| 1033 | *p++ = wct; /* wct */ |
| 1034 | p += 2 * wct; |
| 1035 | WSET(p, 0, bcc); |
| 1036 | |
| 1037 | /* Include the header in the data to send */ |
| 1038 | req->rq_iovlen = 1; |
| 1039 | req->rq_iov[0].iov_base = req->rq_header; |
| 1040 | req->rq_iov[0].iov_len = xmit_len - bcc; |
| 1041 | |
| 1042 | return req->rq_buffer; |
| 1043 | } |
| 1044 | |
| 1045 | static void |
| 1046 | smb_setup_bcc(struct smb_request *req, __u8 *p) |
| 1047 | { |
| 1048 | u16 bcc = p - req->rq_buffer; |
| 1049 | u8 *pbcc = req->rq_header + SMB_HEADER_LEN + 2*SMB_WCT(req->rq_header); |
| 1050 | |
| 1051 | WSET(pbcc, 0, bcc); |
| 1052 | |
| 1053 | smb_encode_smb_length(req->rq_header, SMB_HEADER_LEN + |
| 1054 | 2*SMB_WCT(req->rq_header) - 2 + bcc); |
| 1055 | |
| 1056 | /* Include the "bytes" in the data to send */ |
| 1057 | req->rq_iovlen = 2; |
| 1058 | req->rq_iov[1].iov_base = req->rq_buffer; |
| 1059 | req->rq_iov[1].iov_len = bcc; |
| 1060 | } |
| 1061 | |
| 1062 | static int |
| 1063 | smb_proc_seek(struct smb_sb_info *server, __u16 fileid, |
| 1064 | __u16 mode, off_t offset) |
| 1065 | { |
| 1066 | int result; |
| 1067 | struct smb_request *req; |
| 1068 | |
| 1069 | result = -ENOMEM; |
| 1070 | if (! (req = smb_alloc_request(server, 0))) |
| 1071 | goto out; |
| 1072 | |
| 1073 | smb_setup_header(req, SMBlseek, 4, 0); |
| 1074 | WSET(req->rq_header, smb_vwv0, fileid); |
| 1075 | WSET(req->rq_header, smb_vwv1, mode); |
| 1076 | DSET(req->rq_header, smb_vwv2, offset); |
| 1077 | req->rq_flags |= SMB_REQ_NORETRY; |
| 1078 | |
| 1079 | result = smb_request_ok(req, SMBlseek, 2, 0); |
| 1080 | if (result < 0) { |
| 1081 | result = 0; |
| 1082 | goto out_free; |
| 1083 | } |
| 1084 | |
| 1085 | result = DVAL(req->rq_header, smb_vwv0); |
| 1086 | out_free: |
| 1087 | smb_rput(req); |
| 1088 | out: |
| 1089 | return result; |
| 1090 | } |
| 1091 | |
| 1092 | static int |
| 1093 | smb_proc_open(struct smb_sb_info *server, struct dentry *dentry, int wish) |
| 1094 | { |
| 1095 | struct inode *ino = dentry->d_inode; |
| 1096 | struct smb_inode_info *ei = SMB_I(ino); |
| 1097 | int mode, read_write = 0x42, read_only = 0x40; |
| 1098 | int res; |
| 1099 | char *p; |
| 1100 | struct smb_request *req; |
| 1101 | |
| 1102 | /* |
| 1103 | * Attempt to open r/w, unless there are no write privileges. |
| 1104 | */ |
| 1105 | mode = read_write; |
| 1106 | if (!(ino->i_mode & (S_IWUSR | S_IWGRP | S_IWOTH))) |
| 1107 | mode = read_only; |
| 1108 | #if 0 |
| 1109 | /* FIXME: why is this code not in? below we fix it so that a caller |
| 1110 | wanting RO doesn't get RW. smb_revalidate_inode does some |
| 1111 | optimization based on access mode. tail -f needs it to be correct. |
| 1112 | |
| 1113 | We must open rw since we don't do the open if called a second time |
| 1114 | with different 'wish'. Is that not supported by smb servers? */ |
| 1115 | if (!(wish & (O_WRONLY | O_RDWR))) |
| 1116 | mode = read_only; |
| 1117 | #endif |
| 1118 | |
| 1119 | res = -ENOMEM; |
| 1120 | if (! (req = smb_alloc_request(server, PAGE_SIZE))) |
| 1121 | goto out; |
| 1122 | |
| 1123 | retry: |
| 1124 | p = smb_setup_header(req, SMBopen, 2, 0); |
| 1125 | WSET(req->rq_header, smb_vwv0, mode); |
| 1126 | WSET(req->rq_header, smb_vwv1, aSYSTEM | aHIDDEN | aDIR); |
| 1127 | res = smb_simple_encode_path(req, &p, dentry, NULL); |
| 1128 | if (res < 0) |
| 1129 | goto out_free; |
| 1130 | smb_setup_bcc(req, p); |
| 1131 | |
| 1132 | res = smb_request_ok(req, SMBopen, 7, 0); |
| 1133 | if (res != 0) { |
| 1134 | if (mode == read_write && |
| 1135 | (res == -EACCES || res == -ETXTBSY || res == -EROFS)) |
| 1136 | { |
| 1137 | VERBOSE("%s/%s R/W failed, error=%d, retrying R/O\n", |
| 1138 | DENTRY_PATH(dentry), res); |
| 1139 | mode = read_only; |
| 1140 | req->rq_flags = 0; |
| 1141 | goto retry; |
| 1142 | } |
| 1143 | goto out_free; |
| 1144 | } |
| 1145 | /* We should now have data in vwv[0..6]. */ |
| 1146 | |
| 1147 | ei->fileid = WVAL(req->rq_header, smb_vwv0); |
| 1148 | ei->attr = WVAL(req->rq_header, smb_vwv1); |
| 1149 | /* smb_vwv2 has mtime */ |
| 1150 | /* smb_vwv4 has size */ |
| 1151 | ei->access = (WVAL(req->rq_header, smb_vwv6) & SMB_ACCMASK); |
| 1152 | ei->open = server->generation; |
| 1153 | |
| 1154 | out_free: |
| 1155 | smb_rput(req); |
| 1156 | out: |
| 1157 | return res; |
| 1158 | } |
| 1159 | |
| 1160 | /* |
| 1161 | * Make sure the file is open, and check that the access |
| 1162 | * is compatible with the desired access. |
| 1163 | */ |
| 1164 | int |
| 1165 | smb_open(struct dentry *dentry, int wish) |
| 1166 | { |
| 1167 | struct inode *inode = dentry->d_inode; |
| 1168 | int result; |
| 1169 | __u16 access; |
| 1170 | |
| 1171 | result = -ENOENT; |
| 1172 | if (!inode) { |
| 1173 | printk(KERN_ERR "smb_open: no inode for dentry %s/%s\n", |
| 1174 | DENTRY_PATH(dentry)); |
| 1175 | goto out; |
| 1176 | } |
| 1177 | |
| 1178 | if (!smb_is_open(inode)) { |
| 1179 | struct smb_sb_info *server = server_from_inode(inode); |
| 1180 | result = 0; |
| 1181 | if (!smb_is_open(inode)) |
| 1182 | result = smb_proc_open(server, dentry, wish); |
| 1183 | if (result) |
| 1184 | goto out; |
| 1185 | /* |
| 1186 | * A successful open means the path is still valid ... |
| 1187 | */ |
| 1188 | smb_renew_times(dentry); |
| 1189 | } |
| 1190 | |
| 1191 | /* |
| 1192 | * Check whether the access is compatible with the desired mode. |
| 1193 | */ |
| 1194 | result = 0; |
| 1195 | access = SMB_I(inode)->access; |
| 1196 | if (access != wish && access != SMB_O_RDWR) { |
| 1197 | PARANOIA("%s/%s access denied, access=%x, wish=%x\n", |
| 1198 | DENTRY_PATH(dentry), access, wish); |
| 1199 | result = -EACCES; |
| 1200 | } |
| 1201 | out: |
| 1202 | return result; |
| 1203 | } |
| 1204 | |
| 1205 | static int |
| 1206 | smb_proc_close(struct smb_sb_info *server, __u16 fileid, __u32 mtime) |
| 1207 | { |
| 1208 | struct smb_request *req; |
| 1209 | int result = -ENOMEM; |
| 1210 | |
| 1211 | if (! (req = smb_alloc_request(server, 0))) |
| 1212 | goto out; |
| 1213 | |
| 1214 | smb_setup_header(req, SMBclose, 3, 0); |
| 1215 | WSET(req->rq_header, smb_vwv0, fileid); |
| 1216 | DSET(req->rq_header, smb_vwv1, utc2local(server, mtime)); |
| 1217 | req->rq_flags |= SMB_REQ_NORETRY; |
| 1218 | result = smb_request_ok(req, SMBclose, 0, 0); |
| 1219 | |
| 1220 | smb_rput(req); |
| 1221 | out: |
| 1222 | return result; |
| 1223 | } |
| 1224 | |
| 1225 | /* |
| 1226 | * Win NT 4.0 has an apparent bug in that it fails to update the |
| 1227 | * modify time when writing to a file. As a workaround, we update |
| 1228 | * both modify and access time locally, and post the times to the |
| 1229 | * server when closing the file. |
| 1230 | */ |
| 1231 | static int |
| 1232 | smb_proc_close_inode(struct smb_sb_info *server, struct inode * ino) |
| 1233 | { |
| 1234 | struct smb_inode_info *ei = SMB_I(ino); |
| 1235 | int result = 0; |
| 1236 | if (smb_is_open(ino)) |
| 1237 | { |
| 1238 | /* |
| 1239 | * We clear the open flag in advance, in case another |
| 1240 | * process observes the value while we block below. |
| 1241 | */ |
| 1242 | ei->open = 0; |
| 1243 | |
| 1244 | /* |
| 1245 | * Kludge alert: SMB timestamps are accurate only to |
| 1246 | * two seconds ... round the times to avoid needless |
| 1247 | * cache invalidations! |
| 1248 | */ |
| 1249 | if (ino->i_mtime.tv_sec & 1) { |
| 1250 | ino->i_mtime.tv_sec--; |
| 1251 | ino->i_mtime.tv_nsec = 0; |
| 1252 | } |
| 1253 | if (ino->i_atime.tv_sec & 1) { |
| 1254 | ino->i_atime.tv_sec--; |
| 1255 | ino->i_atime.tv_nsec = 0; |
| 1256 | } |
| 1257 | /* |
| 1258 | * If the file is open with write permissions, |
| 1259 | * update the time stamps to sync mtime and atime. |
| 1260 | */ |
| 1261 | if ((server->opt.capabilities & SMB_CAP_UNIX) == 0 && |
| 1262 | (server->opt.protocol >= SMB_PROTOCOL_LANMAN2) && |
| 1263 | !(ei->access == SMB_O_RDONLY)) |
| 1264 | { |
| 1265 | struct smb_fattr fattr; |
| 1266 | smb_get_inode_attr(ino, &fattr); |
| 1267 | smb_proc_setattr_ext(server, ino, &fattr); |
| 1268 | } |
| 1269 | |
| 1270 | result = smb_proc_close(server, ei->fileid, ino->i_mtime.tv_sec); |
| 1271 | /* |
| 1272 | * Force a revalidation after closing ... some servers |
| 1273 | * don't post the size until the file has been closed. |
| 1274 | */ |
| 1275 | if (server->opt.protocol < SMB_PROTOCOL_NT1) |
| 1276 | ei->oldmtime = 0; |
| 1277 | ei->closed = jiffies; |
| 1278 | } |
| 1279 | return result; |
| 1280 | } |
| 1281 | |
| 1282 | int |
| 1283 | smb_close(struct inode *ino) |
| 1284 | { |
| 1285 | int result = 0; |
| 1286 | |
| 1287 | if (smb_is_open(ino)) { |
| 1288 | struct smb_sb_info *server = server_from_inode(ino); |
| 1289 | result = smb_proc_close_inode(server, ino); |
| 1290 | } |
| 1291 | return result; |
| 1292 | } |
| 1293 | |
| 1294 | /* |
| 1295 | * This is used to close a file following a failed instantiate. |
| 1296 | * Since we don't have an inode, we can't use any of the above. |
| 1297 | */ |
| 1298 | int |
| 1299 | smb_close_fileid(struct dentry *dentry, __u16 fileid) |
| 1300 | { |
| 1301 | struct smb_sb_info *server = server_from_dentry(dentry); |
| 1302 | int result; |
| 1303 | |
| 1304 | result = smb_proc_close(server, fileid, get_seconds()); |
| 1305 | return result; |
| 1306 | } |
| 1307 | |
| 1308 | /* In smb_proc_read and smb_proc_write we do not retry, because the |
| 1309 | file-id would not be valid after a reconnection. */ |
| 1310 | |
| 1311 | static void |
| 1312 | smb_proc_read_data(struct smb_request *req) |
| 1313 | { |
| 1314 | req->rq_iov[0].iov_base = req->rq_buffer; |
| 1315 | req->rq_iov[0].iov_len = 3; |
| 1316 | |
| 1317 | req->rq_iov[1].iov_base = req->rq_page; |
| 1318 | req->rq_iov[1].iov_len = req->rq_rsize; |
| 1319 | req->rq_iovlen = 2; |
| 1320 | |
| 1321 | req->rq_rlen = smb_len(req->rq_header) + 4 - req->rq_bytes_recvd; |
| 1322 | } |
| 1323 | |
| 1324 | static int |
| 1325 | smb_proc_read(struct inode *inode, loff_t offset, int count, char *data) |
| 1326 | { |
| 1327 | struct smb_sb_info *server = server_from_inode(inode); |
| 1328 | __u16 returned_count, data_len; |
| 1329 | unsigned char *buf; |
| 1330 | int result; |
| 1331 | struct smb_request *req; |
| 1332 | u8 rbuf[4]; |
| 1333 | |
| 1334 | result = -ENOMEM; |
| 1335 | if (! (req = smb_alloc_request(server, 0))) |
| 1336 | goto out; |
| 1337 | |
| 1338 | smb_setup_header(req, SMBread, 5, 0); |
| 1339 | buf = req->rq_header; |
| 1340 | WSET(buf, smb_vwv0, SMB_I(inode)->fileid); |
| 1341 | WSET(buf, smb_vwv1, count); |
| 1342 | DSET(buf, smb_vwv2, offset); |
| 1343 | WSET(buf, smb_vwv4, 0); |
| 1344 | |
| 1345 | req->rq_page = data; |
| 1346 | req->rq_rsize = count; |
| 1347 | req->rq_callback = smb_proc_read_data; |
| 1348 | req->rq_buffer = rbuf; |
| 1349 | req->rq_flags |= SMB_REQ_NORETRY | SMB_REQ_STATIC; |
| 1350 | |
| 1351 | result = smb_request_ok(req, SMBread, 5, -1); |
| 1352 | if (result < 0) |
| 1353 | goto out_free; |
| 1354 | returned_count = WVAL(req->rq_header, smb_vwv0); |
| 1355 | |
| 1356 | data_len = WVAL(rbuf, 1); |
| 1357 | |
| 1358 | if (returned_count != data_len) { |
| 1359 | printk(KERN_NOTICE "smb_proc_read: returned != data_len\n"); |
| 1360 | printk(KERN_NOTICE "smb_proc_read: ret_c=%d, data_len=%d\n", |
| 1361 | returned_count, data_len); |
| 1362 | } |
| 1363 | result = data_len; |
| 1364 | |
| 1365 | out_free: |
| 1366 | smb_rput(req); |
| 1367 | out: |
| 1368 | VERBOSE("ino=%ld, fileid=%d, count=%d, result=%d\n", |
| 1369 | inode->i_ino, SMB_I(inode)->fileid, count, result); |
| 1370 | return result; |
| 1371 | } |
| 1372 | |
| 1373 | static int |
| 1374 | smb_proc_write(struct inode *inode, loff_t offset, int count, const char *data) |
| 1375 | { |
| 1376 | struct smb_sb_info *server = server_from_inode(inode); |
| 1377 | int result; |
| 1378 | u16 fileid = SMB_I(inode)->fileid; |
| 1379 | u8 buf[4]; |
| 1380 | struct smb_request *req; |
| 1381 | |
| 1382 | result = -ENOMEM; |
| 1383 | if (! (req = smb_alloc_request(server, 0))) |
| 1384 | goto out; |
| 1385 | |
| 1386 | VERBOSE("ino=%ld, fileid=%d, count=%d@%Ld\n", |
| 1387 | inode->i_ino, fileid, count, offset); |
| 1388 | |
| 1389 | smb_setup_header(req, SMBwrite, 5, count + 3); |
| 1390 | WSET(req->rq_header, smb_vwv0, fileid); |
| 1391 | WSET(req->rq_header, smb_vwv1, count); |
| 1392 | DSET(req->rq_header, smb_vwv2, offset); |
| 1393 | WSET(req->rq_header, smb_vwv4, 0); |
| 1394 | |
| 1395 | buf[0] = 1; |
| 1396 | WSET(buf, 1, count); /* yes, again ... */ |
| 1397 | req->rq_iov[1].iov_base = buf; |
| 1398 | req->rq_iov[1].iov_len = 3; |
| 1399 | req->rq_iov[2].iov_base = (char *) data; |
| 1400 | req->rq_iov[2].iov_len = count; |
| 1401 | req->rq_iovlen = 3; |
| 1402 | req->rq_flags |= SMB_REQ_NORETRY; |
| 1403 | |
| 1404 | result = smb_request_ok(req, SMBwrite, 1, 0); |
| 1405 | if (result >= 0) |
| 1406 | result = WVAL(req->rq_header, smb_vwv0); |
| 1407 | |
| 1408 | smb_rput(req); |
| 1409 | out: |
| 1410 | return result; |
| 1411 | } |
| 1412 | |
| 1413 | /* |
| 1414 | * In smb_proc_readX and smb_proc_writeX we do not retry, because the |
| 1415 | * file-id would not be valid after a reconnection. |
| 1416 | */ |
| 1417 | |
| 1418 | #define SMB_READX_MAX_PAD 64 |
| 1419 | static void |
| 1420 | smb_proc_readX_data(struct smb_request *req) |
| 1421 | { |
| 1422 | /* header length, excluding the netbios length (-4) */ |
| 1423 | int hdrlen = SMB_HEADER_LEN + req->rq_resp_wct*2 - 2; |
| 1424 | int data_off = WVAL(req->rq_header, smb_vwv6); |
| 1425 | |
| 1426 | /* |
| 1427 | * Some genius made the padding to the data bytes arbitrary. |
| 1428 | * So we must first calculate the amount of padding used by the server. |
| 1429 | */ |
| 1430 | data_off -= hdrlen; |
| 1431 | if (data_off > SMB_READX_MAX_PAD || data_off < 0) { |
| 1432 | PARANOIA("offset is larger than SMB_READX_MAX_PAD or negative!\n"); |
| 1433 | PARANOIA("%d > %d || %d < 0\n", data_off, SMB_READX_MAX_PAD, data_off); |
| 1434 | req->rq_rlen = req->rq_bufsize + 1; |
| 1435 | return; |
| 1436 | } |
| 1437 | req->rq_iov[0].iov_base = req->rq_buffer; |
| 1438 | req->rq_iov[0].iov_len = data_off; |
| 1439 | |
| 1440 | req->rq_iov[1].iov_base = req->rq_page; |
| 1441 | req->rq_iov[1].iov_len = req->rq_rsize; |
| 1442 | req->rq_iovlen = 2; |
| 1443 | |
| 1444 | req->rq_rlen = smb_len(req->rq_header) + 4 - req->rq_bytes_recvd; |
| 1445 | } |
| 1446 | |
| 1447 | static int |
| 1448 | smb_proc_readX(struct inode *inode, loff_t offset, int count, char *data) |
| 1449 | { |
| 1450 | struct smb_sb_info *server = server_from_inode(inode); |
| 1451 | unsigned char *buf; |
| 1452 | int result; |
| 1453 | struct smb_request *req; |
| 1454 | static char pad[SMB_READX_MAX_PAD]; |
| 1455 | |
| 1456 | result = -ENOMEM; |
| 1457 | if (! (req = smb_alloc_request(server, 0))) |
| 1458 | goto out; |
| 1459 | |
| 1460 | smb_setup_header(req, SMBreadX, 12, 0); |
| 1461 | buf = req->rq_header; |
| 1462 | WSET(buf, smb_vwv0, 0x00ff); |
| 1463 | WSET(buf, smb_vwv1, 0); |
| 1464 | WSET(buf, smb_vwv2, SMB_I(inode)->fileid); |
| 1465 | DSET(buf, smb_vwv3, (u32)offset); /* low 32 bits */ |
| 1466 | WSET(buf, smb_vwv5, count); |
| 1467 | WSET(buf, smb_vwv6, 0); |
| 1468 | DSET(buf, smb_vwv7, 0); |
| 1469 | WSET(buf, smb_vwv9, 0); |
| 1470 | DSET(buf, smb_vwv10, (u32)(offset >> 32)); /* high 32 bits */ |
| 1471 | WSET(buf, smb_vwv11, 0); |
| 1472 | |
| 1473 | req->rq_page = data; |
| 1474 | req->rq_rsize = count; |
| 1475 | req->rq_callback = smb_proc_readX_data; |
| 1476 | req->rq_buffer = pad; |
| 1477 | req->rq_bufsize = SMB_READX_MAX_PAD; |
| 1478 | req->rq_flags |= SMB_REQ_STATIC | SMB_REQ_NORETRY; |
| 1479 | |
| 1480 | result = smb_request_ok(req, SMBreadX, 12, -1); |
| 1481 | if (result < 0) |
| 1482 | goto out_free; |
| 1483 | result = WVAL(req->rq_header, smb_vwv5); |
| 1484 | |
| 1485 | out_free: |
| 1486 | smb_rput(req); |
| 1487 | out: |
| 1488 | VERBOSE("ino=%ld, fileid=%d, count=%d, result=%d\n", |
| 1489 | inode->i_ino, SMB_I(inode)->fileid, count, result); |
| 1490 | return result; |
| 1491 | } |
| 1492 | |
| 1493 | static int |
| 1494 | smb_proc_writeX(struct inode *inode, loff_t offset, int count, const char *data) |
| 1495 | { |
| 1496 | struct smb_sb_info *server = server_from_inode(inode); |
| 1497 | int result; |
| 1498 | u8 *p; |
| 1499 | static u8 pad[4]; |
| 1500 | struct smb_request *req; |
| 1501 | |
| 1502 | result = -ENOMEM; |
| 1503 | if (! (req = smb_alloc_request(server, 0))) |
| 1504 | goto out; |
| 1505 | |
| 1506 | VERBOSE("ino=%ld, fileid=%d, count=%d@%Ld\n", |
| 1507 | inode->i_ino, SMB_I(inode)->fileid, count, offset); |
| 1508 | |
| 1509 | p = smb_setup_header(req, SMBwriteX, 14, count + 1); |
| 1510 | WSET(req->rq_header, smb_vwv0, 0x00ff); |
| 1511 | WSET(req->rq_header, smb_vwv1, 0); |
| 1512 | WSET(req->rq_header, smb_vwv2, SMB_I(inode)->fileid); |
| 1513 | DSET(req->rq_header, smb_vwv3, (u32)offset); /* low 32 bits */ |
| 1514 | DSET(req->rq_header, smb_vwv5, 0); |
| 1515 | WSET(req->rq_header, smb_vwv7, 0); /* write mode */ |
| 1516 | WSET(req->rq_header, smb_vwv8, 0); |
| 1517 | WSET(req->rq_header, smb_vwv9, 0); |
| 1518 | WSET(req->rq_header, smb_vwv10, count); /* data length */ |
| 1519 | WSET(req->rq_header, smb_vwv11, smb_vwv12 + 2 + 1); |
| 1520 | DSET(req->rq_header, smb_vwv12, (u32)(offset >> 32)); |
| 1521 | |
| 1522 | req->rq_iov[1].iov_base = pad; |
| 1523 | req->rq_iov[1].iov_len = 1; |
| 1524 | req->rq_iov[2].iov_base = (char *) data; |
| 1525 | req->rq_iov[2].iov_len = count; |
| 1526 | req->rq_iovlen = 3; |
| 1527 | req->rq_flags |= SMB_REQ_NORETRY; |
| 1528 | |
| 1529 | result = smb_request_ok(req, SMBwriteX, 6, 0); |
| 1530 | if (result >= 0) |
| 1531 | result = WVAL(req->rq_header, smb_vwv2); |
| 1532 | |
| 1533 | smb_rput(req); |
| 1534 | out: |
| 1535 | return result; |
| 1536 | } |
| 1537 | |
| 1538 | int |
| 1539 | smb_proc_create(struct dentry *dentry, __u16 attr, time_t ctime, __u16 *fileid) |
| 1540 | { |
| 1541 | struct smb_sb_info *server = server_from_dentry(dentry); |
| 1542 | char *p; |
| 1543 | int result; |
| 1544 | struct smb_request *req; |
| 1545 | |
| 1546 | result = -ENOMEM; |
| 1547 | if (! (req = smb_alloc_request(server, PAGE_SIZE))) |
| 1548 | goto out; |
| 1549 | |
| 1550 | p = smb_setup_header(req, SMBcreate, 3, 0); |
| 1551 | WSET(req->rq_header, smb_vwv0, attr); |
| 1552 | DSET(req->rq_header, smb_vwv1, utc2local(server, ctime)); |
| 1553 | result = smb_simple_encode_path(req, &p, dentry, NULL); |
| 1554 | if (result < 0) |
| 1555 | goto out_free; |
| 1556 | smb_setup_bcc(req, p); |
| 1557 | |
| 1558 | result = smb_request_ok(req, SMBcreate, 1, 0); |
| 1559 | if (result < 0) |
| 1560 | goto out_free; |
| 1561 | |
| 1562 | *fileid = WVAL(req->rq_header, smb_vwv0); |
| 1563 | result = 0; |
| 1564 | |
| 1565 | out_free: |
| 1566 | smb_rput(req); |
| 1567 | out: |
| 1568 | return result; |
| 1569 | } |
| 1570 | |
| 1571 | int |
| 1572 | smb_proc_mv(struct dentry *old_dentry, struct dentry *new_dentry) |
| 1573 | { |
| 1574 | struct smb_sb_info *server = server_from_dentry(old_dentry); |
| 1575 | char *p; |
| 1576 | int result; |
| 1577 | struct smb_request *req; |
| 1578 | |
| 1579 | result = -ENOMEM; |
| 1580 | if (! (req = smb_alloc_request(server, PAGE_SIZE))) |
| 1581 | goto out; |
| 1582 | |
| 1583 | p = smb_setup_header(req, SMBmv, 1, 0); |
| 1584 | WSET(req->rq_header, smb_vwv0, aSYSTEM | aHIDDEN | aDIR); |
| 1585 | result = smb_simple_encode_path(req, &p, old_dentry, NULL); |
| 1586 | if (result < 0) |
| 1587 | goto out_free; |
| 1588 | result = smb_simple_encode_path(req, &p, new_dentry, NULL); |
| 1589 | if (result < 0) |
| 1590 | goto out_free; |
| 1591 | smb_setup_bcc(req, p); |
| 1592 | |
| 1593 | if ((result = smb_request_ok(req, SMBmv, 0, 0)) < 0) |
| 1594 | goto out_free; |
| 1595 | result = 0; |
| 1596 | |
| 1597 | out_free: |
| 1598 | smb_rput(req); |
| 1599 | out: |
| 1600 | return result; |
| 1601 | } |
| 1602 | |
| 1603 | /* |
| 1604 | * Code common to mkdir and rmdir. |
| 1605 | */ |
| 1606 | static int |
| 1607 | smb_proc_generic_command(struct dentry *dentry, __u8 command) |
| 1608 | { |
| 1609 | struct smb_sb_info *server = server_from_dentry(dentry); |
| 1610 | char *p; |
| 1611 | int result; |
| 1612 | struct smb_request *req; |
| 1613 | |
| 1614 | result = -ENOMEM; |
| 1615 | if (! (req = smb_alloc_request(server, PAGE_SIZE))) |
| 1616 | goto out; |
| 1617 | |
| 1618 | p = smb_setup_header(req, command, 0, 0); |
| 1619 | result = smb_simple_encode_path(req, &p, dentry, NULL); |
| 1620 | if (result < 0) |
| 1621 | goto out_free; |
| 1622 | smb_setup_bcc(req, p); |
| 1623 | |
| 1624 | result = smb_request_ok(req, command, 0, 0); |
| 1625 | if (result < 0) |
| 1626 | goto out_free; |
| 1627 | result = 0; |
| 1628 | |
| 1629 | out_free: |
| 1630 | smb_rput(req); |
| 1631 | out: |
| 1632 | return result; |
| 1633 | } |
| 1634 | |
| 1635 | int |
| 1636 | smb_proc_mkdir(struct dentry *dentry) |
| 1637 | { |
| 1638 | return smb_proc_generic_command(dentry, SMBmkdir); |
| 1639 | } |
| 1640 | |
| 1641 | int |
| 1642 | smb_proc_rmdir(struct dentry *dentry) |
| 1643 | { |
| 1644 | return smb_proc_generic_command(dentry, SMBrmdir); |
| 1645 | } |
| 1646 | |
| 1647 | #if SMBFS_POSIX_UNLINK |
| 1648 | /* |
| 1649 | * Removes readonly attribute from a file. Used by unlink to give posix |
| 1650 | * semantics. |
| 1651 | */ |
| 1652 | static int |
| 1653 | smb_set_rw(struct dentry *dentry,struct smb_sb_info *server) |
| 1654 | { |
| 1655 | int result; |
| 1656 | struct smb_fattr fattr; |
| 1657 | |
| 1658 | /* FIXME: cifsUE should allow removing a readonly file. */ |
| 1659 | |
| 1660 | /* first get current attribute */ |
| 1661 | smb_init_dirent(server, &fattr); |
| 1662 | result = server->ops->getattr(server, dentry, &fattr); |
| 1663 | smb_finish_dirent(server, &fattr); |
| 1664 | if (result < 0) |
| 1665 | return result; |
| 1666 | |
| 1667 | /* if RONLY attribute is set, remove it */ |
| 1668 | if (fattr.attr & aRONLY) { /* read only attribute is set */ |
| 1669 | fattr.attr &= ~aRONLY; |
| 1670 | result = smb_proc_setattr_core(server, dentry, fattr.attr); |
| 1671 | } |
| 1672 | return result; |
| 1673 | } |
| 1674 | #endif |
| 1675 | |
| 1676 | int |
| 1677 | smb_proc_unlink(struct dentry *dentry) |
| 1678 | { |
| 1679 | struct smb_sb_info *server = server_from_dentry(dentry); |
| 1680 | int flag = 0; |
| 1681 | char *p; |
| 1682 | int result; |
| 1683 | struct smb_request *req; |
| 1684 | |
| 1685 | result = -ENOMEM; |
| 1686 | if (! (req = smb_alloc_request(server, PAGE_SIZE))) |
| 1687 | goto out; |
| 1688 | |
| 1689 | retry: |
| 1690 | p = smb_setup_header(req, SMBunlink, 1, 0); |
| 1691 | WSET(req->rq_header, smb_vwv0, aSYSTEM | aHIDDEN); |
| 1692 | result = smb_simple_encode_path(req, &p, dentry, NULL); |
| 1693 | if (result < 0) |
| 1694 | goto out_free; |
| 1695 | smb_setup_bcc(req, p); |
| 1696 | |
| 1697 | if ((result = smb_request_ok(req, SMBunlink, 0, 0)) < 0) { |
| 1698 | #if SMBFS_POSIX_UNLINK |
| 1699 | if (result == -EACCES && !flag) { |
| 1700 | /* Posix semantics is for the read-only state |
| 1701 | of a file to be ignored in unlink(). In the |
| 1702 | SMB world a unlink() is refused on a |
| 1703 | read-only file. To make things easier for |
| 1704 | unix users we try to override the files |
| 1705 | permission if the unlink fails with the |
| 1706 | right error. |
| 1707 | This introduces a race condition that could |
| 1708 | lead to a file being written by someone who |
| 1709 | shouldn't have access, but as far as I can |
| 1710 | tell that is unavoidable */ |
| 1711 | |
| 1712 | /* remove RONLY attribute and try again */ |
| 1713 | result = smb_set_rw(dentry,server); |
| 1714 | if (result == 0) { |
| 1715 | flag = 1; |
| 1716 | req->rq_flags = 0; |
| 1717 | goto retry; |
| 1718 | } |
| 1719 | } |
| 1720 | #endif |
| 1721 | goto out_free; |
| 1722 | } |
| 1723 | result = 0; |
| 1724 | |
| 1725 | out_free: |
| 1726 | smb_rput(req); |
| 1727 | out: |
| 1728 | return result; |
| 1729 | } |
| 1730 | |
| 1731 | int |
| 1732 | smb_proc_flush(struct smb_sb_info *server, __u16 fileid) |
| 1733 | { |
| 1734 | int result; |
| 1735 | struct smb_request *req; |
| 1736 | |
| 1737 | result = -ENOMEM; |
| 1738 | if (! (req = smb_alloc_request(server, 0))) |
| 1739 | goto out; |
| 1740 | |
| 1741 | smb_setup_header(req, SMBflush, 1, 0); |
| 1742 | WSET(req->rq_header, smb_vwv0, fileid); |
| 1743 | req->rq_flags |= SMB_REQ_NORETRY; |
| 1744 | result = smb_request_ok(req, SMBflush, 0, 0); |
| 1745 | |
| 1746 | smb_rput(req); |
| 1747 | out: |
| 1748 | return result; |
| 1749 | } |
| 1750 | |
| 1751 | static int |
| 1752 | smb_proc_trunc32(struct inode *inode, loff_t length) |
| 1753 | { |
| 1754 | /* |
| 1755 | * Writing 0bytes is old-SMB magic for truncating files. |
| 1756 | * MAX_NON_LFS should prevent this from being called with a too |
| 1757 | * large offset. |
| 1758 | */ |
| 1759 | return smb_proc_write(inode, length, 0, NULL); |
| 1760 | } |
| 1761 | |
| 1762 | static int |
| 1763 | smb_proc_trunc64(struct inode *inode, loff_t length) |
| 1764 | { |
| 1765 | struct smb_sb_info *server = server_from_inode(inode); |
| 1766 | int result; |
| 1767 | char *param; |
| 1768 | char *data; |
| 1769 | struct smb_request *req; |
| 1770 | |
| 1771 | result = -ENOMEM; |
| 1772 | if (! (req = smb_alloc_request(server, 14))) |
| 1773 | goto out; |
| 1774 | |
| 1775 | param = req->rq_buffer; |
| 1776 | data = req->rq_buffer + 6; |
| 1777 | |
| 1778 | /* FIXME: must we also set allocation size? winNT seems to do that */ |
| 1779 | WSET(param, 0, SMB_I(inode)->fileid); |
| 1780 | WSET(param, 2, SMB_SET_FILE_END_OF_FILE_INFO); |
| 1781 | WSET(param, 4, 0); |
| 1782 | LSET(data, 0, length); |
| 1783 | |
| 1784 | req->rq_trans2_command = TRANSACT2_SETFILEINFO; |
| 1785 | req->rq_ldata = 8; |
| 1786 | req->rq_data = data; |
| 1787 | req->rq_lparm = 6; |
| 1788 | req->rq_parm = param; |
| 1789 | req->rq_flags |= SMB_REQ_NORETRY; |
| 1790 | result = smb_add_request(req); |
| 1791 | if (result < 0) |
| 1792 | goto out_free; |
| 1793 | |
| 1794 | result = 0; |
| 1795 | if (req->rq_rcls != 0) |
| 1796 | result = smb_errno(req); |
| 1797 | |
| 1798 | out_free: |
| 1799 | smb_rput(req); |
| 1800 | out: |
| 1801 | return result; |
| 1802 | } |
| 1803 | |
| 1804 | static int |
| 1805 | smb_proc_trunc95(struct inode *inode, loff_t length) |
| 1806 | { |
| 1807 | struct smb_sb_info *server = server_from_inode(inode); |
| 1808 | int result = smb_proc_trunc32(inode, length); |
| 1809 | |
| 1810 | /* |
| 1811 | * win9x doesn't appear to update the size immediately. |
| 1812 | * It will return the old file size after the truncate, |
| 1813 | * confusing smbfs. So we force an update. |
| 1814 | * |
| 1815 | * FIXME: is this still necessary? |
| 1816 | */ |
| 1817 | smb_proc_flush(server, SMB_I(inode)->fileid); |
| 1818 | return result; |
| 1819 | } |
| 1820 | |
| 1821 | static void |
| 1822 | smb_init_dirent(struct smb_sb_info *server, struct smb_fattr *fattr) |
| 1823 | { |
| 1824 | memset(fattr, 0, sizeof(*fattr)); |
| 1825 | |
| 1826 | fattr->f_nlink = 1; |
| 1827 | fattr->f_uid = server->mnt->uid; |
| 1828 | fattr->f_gid = server->mnt->gid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1829 | fattr->f_unix = 0; |
| 1830 | } |
| 1831 | |
| 1832 | static void |
| 1833 | smb_finish_dirent(struct smb_sb_info *server, struct smb_fattr *fattr) |
| 1834 | { |
| 1835 | if (fattr->f_unix) |
| 1836 | return; |
| 1837 | |
| 1838 | fattr->f_mode = server->mnt->file_mode; |
| 1839 | if (fattr->attr & aDIR) { |
| 1840 | fattr->f_mode = server->mnt->dir_mode; |
| 1841 | fattr->f_size = SMB_ST_BLKSIZE; |
| 1842 | } |
| 1843 | /* Check the read-only flag */ |
| 1844 | if (fattr->attr & aRONLY) |
| 1845 | fattr->f_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH); |
| 1846 | |
| 1847 | /* How many 512 byte blocks do we need for this file? */ |
| 1848 | fattr->f_blocks = 0; |
| 1849 | if (fattr->f_size != 0) |
| 1850 | fattr->f_blocks = 1 + ((fattr->f_size-1) >> 9); |
| 1851 | return; |
| 1852 | } |
| 1853 | |
| 1854 | void |
| 1855 | smb_init_root_dirent(struct smb_sb_info *server, struct smb_fattr *fattr, |
| 1856 | struct super_block *sb) |
| 1857 | { |
| 1858 | smb_init_dirent(server, fattr); |
| 1859 | fattr->attr = aDIR; |
| 1860 | fattr->f_ino = 2; /* traditional root inode number */ |
| 1861 | fattr->f_mtime = current_fs_time(sb); |
| 1862 | smb_finish_dirent(server, fattr); |
| 1863 | } |
| 1864 | |
| 1865 | /* |
| 1866 | * Decode a dirent for old protocols |
| 1867 | * |
| 1868 | * qname is filled with the decoded, and possibly translated, name. |
| 1869 | * fattr receives decoded attributes |
| 1870 | * |
| 1871 | * Bugs Noted: |
| 1872 | * (1) Pathworks servers may pad the name with extra spaces. |
| 1873 | */ |
| 1874 | static char * |
| 1875 | smb_decode_short_dirent(struct smb_sb_info *server, char *p, |
| 1876 | struct qstr *qname, struct smb_fattr *fattr, |
| 1877 | unsigned char *name_buf) |
| 1878 | { |
| 1879 | int len; |
| 1880 | |
| 1881 | /* |
| 1882 | * SMB doesn't have a concept of inode numbers ... |
| 1883 | */ |
| 1884 | smb_init_dirent(server, fattr); |
| 1885 | fattr->f_ino = 0; /* FIXME: do we need this? */ |
| 1886 | |
| 1887 | p += SMB_STATUS_SIZE; /* reserved (search_status) */ |
| 1888 | fattr->attr = *p; |
| 1889 | fattr->f_mtime.tv_sec = date_dos2unix(server, WVAL(p, 3), WVAL(p, 1)); |
| 1890 | fattr->f_mtime.tv_nsec = 0; |
| 1891 | fattr->f_size = DVAL(p, 5); |
| 1892 | fattr->f_ctime = fattr->f_mtime; |
| 1893 | fattr->f_atime = fattr->f_mtime; |
| 1894 | qname->name = p + 9; |
| 1895 | len = strnlen(qname->name, 12); |
| 1896 | |
| 1897 | /* |
| 1898 | * Trim trailing blanks for Pathworks servers |
| 1899 | */ |
| 1900 | while (len > 2 && qname->name[len-1] == ' ') |
| 1901 | len--; |
| 1902 | |
| 1903 | smb_finish_dirent(server, fattr); |
| 1904 | |
| 1905 | #if 0 |
| 1906 | /* FIXME: These only work for ascii chars, and recent smbmount doesn't |
| 1907 | allow the flag to be set anyway. It kills const. Remove? */ |
| 1908 | switch (server->opt.case_handling) { |
| 1909 | case SMB_CASE_UPPER: |
| 1910 | str_upper(entry->name, len); |
| 1911 | break; |
| 1912 | case SMB_CASE_LOWER: |
| 1913 | str_lower(entry->name, len); |
| 1914 | break; |
| 1915 | default: |
| 1916 | break; |
| 1917 | } |
| 1918 | #endif |
| 1919 | |
| 1920 | qname->len = 0; |
| 1921 | len = server->ops->convert(name_buf, SMB_MAXNAMELEN, |
| 1922 | qname->name, len, |
| 1923 | server->remote_nls, server->local_nls); |
| 1924 | if (len > 0) { |
| 1925 | qname->len = len; |
| 1926 | qname->name = name_buf; |
| 1927 | DEBUG1("len=%d, name=%.*s\n",qname->len,qname->len,qname->name); |
| 1928 | } |
| 1929 | |
| 1930 | return p + 22; |
| 1931 | } |
| 1932 | |
| 1933 | /* |
| 1934 | * This routine is used to read in directory entries from the network. |
| 1935 | * Note that it is for short directory name seeks, i.e.: protocol < |
| 1936 | * SMB_PROTOCOL_LANMAN2 |
| 1937 | */ |
| 1938 | static int |
| 1939 | smb_proc_readdir_short(struct file *filp, void *dirent, filldir_t filldir, |
| 1940 | struct smb_cache_control *ctl) |
| 1941 | { |
| 1942 | struct dentry *dir = filp->f_dentry; |
| 1943 | struct smb_sb_info *server = server_from_dentry(dir); |
| 1944 | struct qstr qname; |
| 1945 | struct smb_fattr fattr; |
| 1946 | char *p; |
| 1947 | int result; |
| 1948 | int i, first, entries_seen, entries; |
| 1949 | int entries_asked = (server->opt.max_xmit - 100) / SMB_DIRINFO_SIZE; |
| 1950 | __u16 bcc; |
| 1951 | __u16 count; |
| 1952 | char status[SMB_STATUS_SIZE]; |
| 1953 | static struct qstr mask = { |
| 1954 | .name = "*.*", |
| 1955 | .len = 3, |
| 1956 | }; |
| 1957 | unsigned char *last_status; |
| 1958 | struct smb_request *req; |
| 1959 | unsigned char *name_buf; |
| 1960 | |
| 1961 | VERBOSE("%s/%s\n", DENTRY_PATH(dir)); |
| 1962 | |
| 1963 | lock_kernel(); |
| 1964 | |
| 1965 | result = -ENOMEM; |
| 1966 | if (! (name_buf = kmalloc(SMB_MAXNAMELEN, GFP_KERNEL))) |
| 1967 | goto out; |
| 1968 | |
| 1969 | first = 1; |
| 1970 | entries = 0; |
| 1971 | entries_seen = 2; /* implicit . and .. */ |
| 1972 | |
| 1973 | result = -ENOMEM; |
| 1974 | if (! (req = smb_alloc_request(server, server->opt.max_xmit))) |
| 1975 | goto out_name; |
| 1976 | |
| 1977 | while (1) { |
| 1978 | p = smb_setup_header(req, SMBsearch, 2, 0); |
| 1979 | WSET(req->rq_header, smb_vwv0, entries_asked); |
| 1980 | WSET(req->rq_header, smb_vwv1, aDIR); |
| 1981 | if (first == 1) { |
| 1982 | result = smb_simple_encode_path(req, &p, dir, &mask); |
| 1983 | if (result < 0) |
| 1984 | goto out_free; |
| 1985 | if (p + 3 > (char *)req->rq_buffer + req->rq_bufsize) { |
| 1986 | result = -ENAMETOOLONG; |
| 1987 | goto out_free; |
| 1988 | } |
| 1989 | *p++ = 5; |
| 1990 | WSET(p, 0, 0); |
| 1991 | p += 2; |
| 1992 | first = 0; |
| 1993 | } else { |
| 1994 | if (p + 5 + SMB_STATUS_SIZE > |
| 1995 | (char *)req->rq_buffer + req->rq_bufsize) { |
| 1996 | result = -ENAMETOOLONG; |
| 1997 | goto out_free; |
| 1998 | } |
| 1999 | |
| 2000 | *p++ = 4; |
| 2001 | *p++ = 0; |
| 2002 | *p++ = 5; |
| 2003 | WSET(p, 0, SMB_STATUS_SIZE); |
| 2004 | p += 2; |
| 2005 | memcpy(p, status, SMB_STATUS_SIZE); |
| 2006 | p += SMB_STATUS_SIZE; |
| 2007 | } |
| 2008 | |
| 2009 | smb_setup_bcc(req, p); |
| 2010 | |
| 2011 | result = smb_request_ok(req, SMBsearch, 1, -1); |
| 2012 | if (result < 0) { |
| 2013 | if ((req->rq_rcls == ERRDOS) && |
| 2014 | (req->rq_err == ERRnofiles)) |
| 2015 | break; |
| 2016 | goto out_free; |
| 2017 | } |
| 2018 | count = WVAL(req->rq_header, smb_vwv0); |
| 2019 | if (count <= 0) |
| 2020 | break; |
| 2021 | |
| 2022 | result = -EIO; |
| 2023 | bcc = smb_bcc(req->rq_header); |
| 2024 | if (bcc != count * SMB_DIRINFO_SIZE + 3) |
| 2025 | goto out_free; |
| 2026 | p = req->rq_buffer + 3; |
| 2027 | |
| 2028 | |
| 2029 | /* Make sure the response fits in the buffer. Fixed sized |
| 2030 | entries means we don't have to check in the decode loop. */ |
| 2031 | |
| 2032 | last_status = req->rq_buffer + 3 + (count-1) * SMB_DIRINFO_SIZE; |
| 2033 | |
| 2034 | if (last_status + SMB_DIRINFO_SIZE >= |
| 2035 | req->rq_buffer + req->rq_bufsize) { |
| 2036 | printk(KERN_ERR "smb_proc_readdir_short: " |
| 2037 | "last dir entry outside buffer! " |
| 2038 | "%d@%p %d@%p\n", SMB_DIRINFO_SIZE, last_status, |
| 2039 | req->rq_bufsize, req->rq_buffer); |
| 2040 | goto out_free; |
| 2041 | } |
| 2042 | |
| 2043 | /* Read the last entry into the status field. */ |
| 2044 | memcpy(status, last_status, SMB_STATUS_SIZE); |
| 2045 | |
| 2046 | |
| 2047 | /* Now we are ready to parse smb directory entries. */ |
| 2048 | |
| 2049 | for (i = 0; i < count; i++) { |
| 2050 | p = smb_decode_short_dirent(server, p, |
| 2051 | &qname, &fattr, name_buf); |
| 2052 | if (qname.len == 0) |
| 2053 | continue; |
| 2054 | |
| 2055 | if (entries_seen == 2 && qname.name[0] == '.') { |
| 2056 | if (qname.len == 1) |
| 2057 | continue; |
| 2058 | if (qname.name[1] == '.' && qname.len == 2) |
| 2059 | continue; |
| 2060 | } |
| 2061 | if (!smb_fill_cache(filp, dirent, filldir, ctl, |
| 2062 | &qname, &fattr)) |
| 2063 | ; /* stop reading? */ |
| 2064 | entries_seen++; |
| 2065 | } |
| 2066 | } |
| 2067 | result = entries; |
| 2068 | |
| 2069 | out_free: |
| 2070 | smb_rput(req); |
| 2071 | out_name: |
| 2072 | kfree(name_buf); |
| 2073 | out: |
| 2074 | unlock_kernel(); |
| 2075 | return result; |
| 2076 | } |
| 2077 | |
| 2078 | static void smb_decode_unix_basic(struct smb_fattr *fattr, struct smb_sb_info *server, char *p) |
| 2079 | { |
| 2080 | u64 size, disk_bytes; |
| 2081 | |
| 2082 | /* FIXME: verify nls support. all is sent as utf8? */ |
| 2083 | |
| 2084 | fattr->f_unix = 1; |
| 2085 | fattr->f_mode = 0; |
| 2086 | |
| 2087 | /* FIXME: use the uniqueID from the remote instead? */ |
| 2088 | /* 0 L file size in bytes */ |
| 2089 | /* 8 L file size on disk in bytes (block count) */ |
| 2090 | /* 40 L uid */ |
| 2091 | /* 48 L gid */ |
| 2092 | /* 56 W file type */ |
| 2093 | /* 60 L devmajor */ |
| 2094 | /* 68 L devminor */ |
| 2095 | /* 76 L unique ID (inode) */ |
| 2096 | /* 84 L permissions */ |
| 2097 | /* 92 L link count */ |
| 2098 | |
| 2099 | size = LVAL(p, 0); |
| 2100 | disk_bytes = LVAL(p, 8); |
| 2101 | |
| 2102 | /* |
| 2103 | * Some samba versions round up on-disk byte usage |
| 2104 | * to 1MB boundaries, making it useless. When seeing |
| 2105 | * that, use the size instead. |
| 2106 | */ |
| 2107 | if (!(disk_bytes & 0xfffff)) |
| 2108 | disk_bytes = size+511; |
| 2109 | |
| 2110 | fattr->f_size = size; |
| 2111 | fattr->f_blocks = disk_bytes >> 9; |
| 2112 | fattr->f_ctime = smb_ntutc2unixutc(LVAL(p, 16)); |
| 2113 | fattr->f_atime = smb_ntutc2unixutc(LVAL(p, 24)); |
| 2114 | fattr->f_mtime = smb_ntutc2unixutc(LVAL(p, 32)); |
| 2115 | |
| 2116 | if (server->mnt->flags & SMB_MOUNT_UID) |
| 2117 | fattr->f_uid = server->mnt->uid; |
| 2118 | else |
| 2119 | fattr->f_uid = LVAL(p, 40); |
| 2120 | |
| 2121 | if (server->mnt->flags & SMB_MOUNT_GID) |
| 2122 | fattr->f_gid = server->mnt->gid; |
| 2123 | else |
| 2124 | fattr->f_gid = LVAL(p, 48); |
| 2125 | |
| 2126 | fattr->f_mode |= smb_filetype_to_mode(WVAL(p, 56)); |
| 2127 | |
| 2128 | if (S_ISBLK(fattr->f_mode) || S_ISCHR(fattr->f_mode)) { |
| 2129 | __u64 major = LVAL(p, 60); |
| 2130 | __u64 minor = LVAL(p, 68); |
| 2131 | |
| 2132 | fattr->f_rdev = MKDEV(major & 0xffffffff, minor & 0xffffffff); |
| 2133 | if (MAJOR(fattr->f_rdev) != (major & 0xffffffff) || |
| 2134 | MINOR(fattr->f_rdev) != (minor & 0xffffffff)) |
| 2135 | fattr->f_rdev = 0; |
| 2136 | } |
| 2137 | |
| 2138 | fattr->f_mode |= LVAL(p, 84); |
| 2139 | |
| 2140 | if ( (server->mnt->flags & SMB_MOUNT_DMODE) && |
| 2141 | (S_ISDIR(fattr->f_mode)) ) |
| 2142 | fattr->f_mode = (server->mnt->dir_mode & S_IRWXUGO) | S_IFDIR; |
| 2143 | else if ( (server->mnt->flags & SMB_MOUNT_FMODE) && |
| 2144 | !(S_ISDIR(fattr->f_mode)) ) |
| 2145 | fattr->f_mode = (server->mnt->file_mode & S_IRWXUGO) | |
| 2146 | (fattr->f_mode & S_IFMT); |
| 2147 | |
| 2148 | } |
| 2149 | |
| 2150 | /* |
| 2151 | * Interpret a long filename structure using the specified info level: |
| 2152 | * level 1 for anything below NT1 protocol |
| 2153 | * level 260 for NT1 protocol |
| 2154 | * |
| 2155 | * qname is filled with the decoded, and possibly translated, name |
| 2156 | * fattr receives decoded attributes. |
| 2157 | * |
| 2158 | * Bugs Noted: |
| 2159 | * (1) Win NT 4.0 appends a null byte to names and counts it in the length! |
| 2160 | */ |
| 2161 | static char * |
| 2162 | smb_decode_long_dirent(struct smb_sb_info *server, char *p, int level, |
| 2163 | struct qstr *qname, struct smb_fattr *fattr, |
| 2164 | unsigned char *name_buf) |
| 2165 | { |
| 2166 | char *result; |
| 2167 | unsigned int len = 0; |
| 2168 | int n; |
| 2169 | __u16 date, time; |
| 2170 | int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE); |
| 2171 | |
| 2172 | /* |
| 2173 | * SMB doesn't have a concept of inode numbers ... |
| 2174 | */ |
| 2175 | smb_init_dirent(server, fattr); |
| 2176 | fattr->f_ino = 0; /* FIXME: do we need this? */ |
| 2177 | |
| 2178 | switch (level) { |
| 2179 | case 1: |
| 2180 | len = *((unsigned char *) p + 22); |
| 2181 | qname->name = p + 23; |
| 2182 | result = p + 24 + len; |
| 2183 | |
| 2184 | date = WVAL(p, 0); |
| 2185 | time = WVAL(p, 2); |
| 2186 | fattr->f_ctime.tv_sec = date_dos2unix(server, date, time); |
| 2187 | fattr->f_ctime.tv_nsec = 0; |
| 2188 | |
| 2189 | date = WVAL(p, 4); |
| 2190 | time = WVAL(p, 6); |
| 2191 | fattr->f_atime.tv_sec = date_dos2unix(server, date, time); |
| 2192 | fattr->f_atime.tv_nsec = 0; |
| 2193 | |
| 2194 | date = WVAL(p, 8); |
| 2195 | time = WVAL(p, 10); |
| 2196 | fattr->f_mtime.tv_sec = date_dos2unix(server, date, time); |
| 2197 | fattr->f_mtime.tv_nsec = 0; |
| 2198 | fattr->f_size = DVAL(p, 12); |
| 2199 | /* ULONG allocation size */ |
| 2200 | fattr->attr = WVAL(p, 20); |
| 2201 | |
| 2202 | VERBOSE("info 1 at %p, len=%d, name=%.*s\n", |
| 2203 | p, len, len, qname->name); |
| 2204 | break; |
| 2205 | case 260: |
| 2206 | result = p + WVAL(p, 0); |
| 2207 | len = DVAL(p, 60); |
| 2208 | if (len > 255) len = 255; |
| 2209 | /* NT4 null terminates, unless we are using unicode ... */ |
| 2210 | qname->name = p + 94; |
| 2211 | if (!unicode && len && qname->name[len-1] == '\0') |
| 2212 | len--; |
| 2213 | |
| 2214 | fattr->f_ctime = smb_ntutc2unixutc(LVAL(p, 8)); |
| 2215 | fattr->f_atime = smb_ntutc2unixutc(LVAL(p, 16)); |
| 2216 | fattr->f_mtime = smb_ntutc2unixutc(LVAL(p, 24)); |
| 2217 | /* change time (32) */ |
| 2218 | fattr->f_size = LVAL(p, 40); |
| 2219 | /* alloc size (48) */ |
| 2220 | fattr->attr = DVAL(p, 56); |
| 2221 | |
| 2222 | VERBOSE("info 260 at %p, len=%d, name=%.*s\n", |
| 2223 | p, len, len, qname->name); |
| 2224 | break; |
| 2225 | case SMB_FIND_FILE_UNIX: |
| 2226 | result = p + WVAL(p, 0); |
| 2227 | qname->name = p + 108; |
| 2228 | |
| 2229 | len = strlen(qname->name); |
| 2230 | /* FIXME: should we check the length?? */ |
| 2231 | |
| 2232 | p += 8; |
| 2233 | smb_decode_unix_basic(fattr, server, p); |
| 2234 | VERBOSE("info SMB_FIND_FILE_UNIX at %p, len=%d, name=%.*s\n", |
| 2235 | p, len, len, qname->name); |
| 2236 | break; |
| 2237 | default: |
| 2238 | PARANOIA("Unknown info level %d\n", level); |
| 2239 | result = p + WVAL(p, 0); |
| 2240 | goto out; |
| 2241 | } |
| 2242 | |
| 2243 | smb_finish_dirent(server, fattr); |
| 2244 | |
| 2245 | #if 0 |
| 2246 | /* FIXME: These only work for ascii chars, and recent smbmount doesn't |
| 2247 | allow the flag to be set anyway. Remove? */ |
| 2248 | switch (server->opt.case_handling) { |
| 2249 | case SMB_CASE_UPPER: |
| 2250 | str_upper(qname->name, len); |
| 2251 | break; |
| 2252 | case SMB_CASE_LOWER: |
| 2253 | str_lower(qname->name, len); |
| 2254 | break; |
| 2255 | default: |
| 2256 | break; |
| 2257 | } |
| 2258 | #endif |
| 2259 | |
| 2260 | qname->len = 0; |
| 2261 | n = server->ops->convert(name_buf, SMB_MAXNAMELEN, |
| 2262 | qname->name, len, |
| 2263 | server->remote_nls, server->local_nls); |
| 2264 | if (n > 0) { |
| 2265 | qname->len = n; |
| 2266 | qname->name = name_buf; |
| 2267 | } |
| 2268 | |
| 2269 | out: |
| 2270 | return result; |
| 2271 | } |
| 2272 | |
| 2273 | /* findfirst/findnext flags */ |
| 2274 | #define SMB_CLOSE_AFTER_FIRST (1<<0) |
| 2275 | #define SMB_CLOSE_IF_END (1<<1) |
| 2276 | #define SMB_REQUIRE_RESUME_KEY (1<<2) |
| 2277 | #define SMB_CONTINUE_BIT (1<<3) |
| 2278 | |
| 2279 | /* |
| 2280 | * Note: samba-2.0.7 (at least) has a very similar routine, cli_list, in |
| 2281 | * source/libsmb/clilist.c. When looking for smb bugs in the readdir code, |
| 2282 | * go there for advise. |
| 2283 | * |
| 2284 | * Bugs Noted: |
| 2285 | * (1) When using Info Level 1 Win NT 4.0 truncates directory listings |
| 2286 | * for certain patterns of names and/or lengths. The breakage pattern |
| 2287 | * is completely reproducible and can be toggled by the creation of a |
| 2288 | * single file. (E.g. echo hi >foo breaks, rm -f foo works.) |
| 2289 | */ |
| 2290 | static int |
| 2291 | smb_proc_readdir_long(struct file *filp, void *dirent, filldir_t filldir, |
| 2292 | struct smb_cache_control *ctl) |
| 2293 | { |
| 2294 | struct dentry *dir = filp->f_dentry; |
| 2295 | struct smb_sb_info *server = server_from_dentry(dir); |
| 2296 | struct qstr qname; |
| 2297 | struct smb_fattr fattr; |
| 2298 | |
| 2299 | unsigned char *p, *lastname; |
| 2300 | char *mask, *param; |
| 2301 | __u16 command; |
| 2302 | int first, entries_seen; |
| 2303 | |
| 2304 | /* Both NT and OS/2 accept info level 1 (but see note below). */ |
| 2305 | int info_level = 260; |
| 2306 | const int max_matches = 512; |
| 2307 | |
| 2308 | unsigned int ff_searchcount = 0; |
| 2309 | unsigned int ff_eos = 0; |
| 2310 | unsigned int ff_lastname = 0; |
| 2311 | unsigned int ff_dir_handle = 0; |
| 2312 | unsigned int loop_count = 0; |
| 2313 | unsigned int mask_len, i; |
| 2314 | int result; |
| 2315 | struct smb_request *req; |
| 2316 | unsigned char *name_buf; |
| 2317 | static struct qstr star = { |
| 2318 | .name = "*", |
| 2319 | .len = 1, |
| 2320 | }; |
| 2321 | |
| 2322 | lock_kernel(); |
| 2323 | |
| 2324 | /* |
| 2325 | * We always prefer unix style. Use info level 1 for older |
| 2326 | * servers that don't do 260. |
| 2327 | */ |
| 2328 | if (server->opt.capabilities & SMB_CAP_UNIX) |
| 2329 | info_level = SMB_FIND_FILE_UNIX; |
| 2330 | else if (server->opt.protocol < SMB_PROTOCOL_NT1) |
| 2331 | info_level = 1; |
| 2332 | |
| 2333 | result = -ENOMEM; |
| 2334 | if (! (name_buf = kmalloc(SMB_MAXNAMELEN+2, GFP_KERNEL))) |
| 2335 | goto out; |
| 2336 | if (! (req = smb_alloc_request(server, server->opt.max_xmit))) |
| 2337 | goto out_name; |
| 2338 | param = req->rq_buffer; |
| 2339 | |
| 2340 | /* |
| 2341 | * Encode the initial path |
| 2342 | */ |
| 2343 | mask = param + 12; |
| 2344 | |
| 2345 | result = smb_encode_path(server, mask, SMB_MAXPATHLEN+1, dir, &star); |
| 2346 | if (result <= 0) |
| 2347 | goto out_free; |
| 2348 | mask_len = result - 1; /* mask_len is strlen, not #bytes */ |
| 2349 | result = 0; |
| 2350 | first = 1; |
| 2351 | VERBOSE("starting mask_len=%d, mask=%s\n", mask_len, mask); |
| 2352 | |
| 2353 | entries_seen = 2; |
| 2354 | ff_eos = 0; |
| 2355 | |
| 2356 | while (ff_eos == 0) { |
| 2357 | loop_count += 1; |
| 2358 | if (loop_count > 10) { |
| 2359 | printk(KERN_WARNING "smb_proc_readdir_long: " |
| 2360 | "Looping in FIND_NEXT??\n"); |
| 2361 | result = -EIO; |
| 2362 | break; |
| 2363 | } |
| 2364 | |
| 2365 | if (first != 0) { |
| 2366 | command = TRANSACT2_FINDFIRST; |
| 2367 | WSET(param, 0, aSYSTEM | aHIDDEN | aDIR); |
| 2368 | WSET(param, 2, max_matches); /* max count */ |
| 2369 | WSET(param, 4, SMB_CLOSE_IF_END); |
| 2370 | WSET(param, 6, info_level); |
| 2371 | DSET(param, 8, 0); |
| 2372 | } else { |
| 2373 | command = TRANSACT2_FINDNEXT; |
| 2374 | |
| 2375 | VERBOSE("handle=0x%X, lastname=%d, mask=%.*s\n", |
| 2376 | ff_dir_handle, ff_lastname, mask_len, mask); |
| 2377 | |
| 2378 | WSET(param, 0, ff_dir_handle); /* search handle */ |
| 2379 | WSET(param, 2, max_matches); /* max count */ |
| 2380 | WSET(param, 4, info_level); |
| 2381 | DSET(param, 6, 0); |
| 2382 | WSET(param, 10, SMB_CONTINUE_BIT|SMB_CLOSE_IF_END); |
| 2383 | } |
| 2384 | |
| 2385 | req->rq_trans2_command = command; |
| 2386 | req->rq_ldata = 0; |
| 2387 | req->rq_data = NULL; |
| 2388 | req->rq_lparm = 12 + mask_len + 1; |
| 2389 | req->rq_parm = param; |
| 2390 | req->rq_flags = 0; |
| 2391 | result = smb_add_request(req); |
| 2392 | if (result < 0) { |
| 2393 | PARANOIA("error=%d, breaking\n", result); |
| 2394 | break; |
| 2395 | } |
| 2396 | |
| 2397 | if (req->rq_rcls == ERRSRV && req->rq_err == ERRerror) { |
| 2398 | /* a damn Win95 bug - sometimes it clags if you |
| 2399 | ask it too fast */ |
Nishanth Aravamudan | 041e0e3 | 2005-09-10 00:27:23 -0700 | [diff] [blame] | 2400 | schedule_timeout_interruptible(msecs_to_jiffies(200)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2401 | continue; |
| 2402 | } |
| 2403 | |
| 2404 | if (req->rq_rcls != 0) { |
| 2405 | result = smb_errno(req); |
| 2406 | PARANOIA("name=%s, result=%d, rcls=%d, err=%d\n", |
| 2407 | mask, result, req->rq_rcls, req->rq_err); |
| 2408 | break; |
| 2409 | } |
| 2410 | |
| 2411 | /* parse out some important return info */ |
| 2412 | if (first != 0) { |
| 2413 | ff_dir_handle = WVAL(req->rq_parm, 0); |
| 2414 | ff_searchcount = WVAL(req->rq_parm, 2); |
| 2415 | ff_eos = WVAL(req->rq_parm, 4); |
| 2416 | ff_lastname = WVAL(req->rq_parm, 8); |
| 2417 | } else { |
| 2418 | ff_searchcount = WVAL(req->rq_parm, 0); |
| 2419 | ff_eos = WVAL(req->rq_parm, 2); |
| 2420 | ff_lastname = WVAL(req->rq_parm, 6); |
| 2421 | } |
| 2422 | |
| 2423 | if (ff_searchcount == 0) |
| 2424 | break; |
| 2425 | |
| 2426 | /* Now we are ready to parse smb directory entries. */ |
| 2427 | |
| 2428 | /* point to the data bytes */ |
| 2429 | p = req->rq_data; |
| 2430 | for (i = 0; i < ff_searchcount; i++) { |
| 2431 | /* make sure we stay within the buffer */ |
| 2432 | if (p >= req->rq_data + req->rq_ldata) { |
| 2433 | printk(KERN_ERR "smb_proc_readdir_long: " |
| 2434 | "dirent pointer outside buffer! " |
| 2435 | "%p %d@%p\n", |
| 2436 | p, req->rq_ldata, req->rq_data); |
| 2437 | result = -EIO; /* always a comm. error? */ |
| 2438 | goto out_free; |
| 2439 | } |
| 2440 | |
| 2441 | p = smb_decode_long_dirent(server, p, info_level, |
| 2442 | &qname, &fattr, name_buf); |
| 2443 | |
| 2444 | /* ignore . and .. from the server */ |
| 2445 | if (entries_seen == 2 && qname.name[0] == '.') { |
| 2446 | if (qname.len == 1) |
| 2447 | continue; |
| 2448 | if (qname.name[1] == '.' && qname.len == 2) |
| 2449 | continue; |
| 2450 | } |
| 2451 | |
| 2452 | if (!smb_fill_cache(filp, dirent, filldir, ctl, |
| 2453 | &qname, &fattr)) |
| 2454 | ; /* stop reading? */ |
| 2455 | entries_seen++; |
| 2456 | } |
| 2457 | |
| 2458 | VERBOSE("received %d entries, eos=%d\n", ff_searchcount,ff_eos); |
| 2459 | |
| 2460 | /* |
| 2461 | * We might need the lastname for continuations. |
| 2462 | * |
| 2463 | * Note that some servers (win95?) point to the filename and |
| 2464 | * others (NT4, Samba using NT1) to the dir entry. We assume |
| 2465 | * here that those who do not point to a filename do not need |
| 2466 | * this info to continue the listing. |
| 2467 | * |
| 2468 | * OS/2 needs this and talks infolevel 1. |
| 2469 | * NetApps want lastname with infolevel 260. |
| 2470 | * win2k want lastname with infolevel 260, and points to |
| 2471 | * the record not to the name. |
| 2472 | * Samba+CifsUnixExt doesn't need lastname. |
| 2473 | * |
| 2474 | * Both are happy if we return the data they point to. So we do. |
| 2475 | * (FIXME: above is not true with win2k) |
| 2476 | */ |
| 2477 | mask_len = 0; |
| 2478 | if (info_level != SMB_FIND_FILE_UNIX && |
| 2479 | ff_lastname > 0 && ff_lastname < req->rq_ldata) { |
| 2480 | lastname = req->rq_data + ff_lastname; |
| 2481 | |
| 2482 | switch (info_level) { |
| 2483 | case 260: |
| 2484 | mask_len = req->rq_ldata - ff_lastname; |
| 2485 | break; |
| 2486 | case 1: |
| 2487 | /* lastname points to a length byte */ |
| 2488 | mask_len = *lastname++; |
| 2489 | if (ff_lastname + 1 + mask_len > req->rq_ldata) |
| 2490 | mask_len = req->rq_ldata - ff_lastname - 1; |
| 2491 | break; |
| 2492 | } |
| 2493 | |
| 2494 | /* |
| 2495 | * Update the mask string for the next message. |
| 2496 | */ |
| 2497 | if (mask_len > 255) |
| 2498 | mask_len = 255; |
| 2499 | if (mask_len) |
| 2500 | strncpy(mask, lastname, mask_len); |
| 2501 | } |
| 2502 | mask_len = strnlen(mask, mask_len); |
| 2503 | VERBOSE("new mask, len=%d@%d of %d, mask=%.*s\n", |
| 2504 | mask_len, ff_lastname, req->rq_ldata, mask_len, mask); |
| 2505 | |
| 2506 | first = 0; |
| 2507 | loop_count = 0; |
| 2508 | } |
| 2509 | |
| 2510 | out_free: |
| 2511 | smb_rput(req); |
| 2512 | out_name: |
| 2513 | kfree(name_buf); |
| 2514 | out: |
| 2515 | unlock_kernel(); |
| 2516 | return result; |
| 2517 | } |
| 2518 | |
| 2519 | /* |
| 2520 | * This version uses the trans2 TRANSACT2_FINDFIRST message |
| 2521 | * to get the attribute data. |
| 2522 | * |
| 2523 | * Bugs Noted: |
| 2524 | */ |
| 2525 | static int |
| 2526 | smb_proc_getattr_ff(struct smb_sb_info *server, struct dentry *dentry, |
| 2527 | struct smb_fattr *fattr) |
| 2528 | { |
| 2529 | char *param, *mask; |
| 2530 | __u16 date, time; |
| 2531 | int mask_len, result; |
| 2532 | struct smb_request *req; |
| 2533 | |
| 2534 | result = -ENOMEM; |
| 2535 | if (! (req = smb_alloc_request(server, PAGE_SIZE))) |
| 2536 | goto out; |
| 2537 | param = req->rq_buffer; |
| 2538 | mask = param + 12; |
| 2539 | |
| 2540 | mask_len = smb_encode_path(server, mask, SMB_MAXPATHLEN+1, dentry,NULL); |
| 2541 | if (mask_len < 0) { |
| 2542 | result = mask_len; |
| 2543 | goto out_free; |
| 2544 | } |
| 2545 | VERBOSE("name=%s, len=%d\n", mask, mask_len); |
| 2546 | WSET(param, 0, aSYSTEM | aHIDDEN | aDIR); |
| 2547 | WSET(param, 2, 1); /* max count */ |
| 2548 | WSET(param, 4, 1); /* close after this call */ |
| 2549 | WSET(param, 6, 1); /* info_level */ |
| 2550 | DSET(param, 8, 0); |
| 2551 | |
| 2552 | req->rq_trans2_command = TRANSACT2_FINDFIRST; |
| 2553 | req->rq_ldata = 0; |
| 2554 | req->rq_data = NULL; |
| 2555 | req->rq_lparm = 12 + mask_len; |
| 2556 | req->rq_parm = param; |
| 2557 | req->rq_flags = 0; |
| 2558 | result = smb_add_request(req); |
| 2559 | if (result < 0) |
| 2560 | goto out_free; |
| 2561 | if (req->rq_rcls != 0) { |
| 2562 | result = smb_errno(req); |
| 2563 | #ifdef SMBFS_PARANOIA |
| 2564 | if (result != -ENOENT) |
| 2565 | PARANOIA("error for %s, rcls=%d, err=%d\n", |
| 2566 | mask, req->rq_rcls, req->rq_err); |
| 2567 | #endif |
| 2568 | goto out_free; |
| 2569 | } |
| 2570 | /* Make sure we got enough data ... */ |
| 2571 | result = -EINVAL; |
| 2572 | if (req->rq_ldata < 22 || WVAL(req->rq_parm, 2) != 1) { |
| 2573 | PARANOIA("bad result for %s, len=%d, count=%d\n", |
| 2574 | mask, req->rq_ldata, WVAL(req->rq_parm, 2)); |
| 2575 | goto out_free; |
| 2576 | } |
| 2577 | |
| 2578 | /* |
| 2579 | * Decode the response into the fattr ... |
| 2580 | */ |
| 2581 | date = WVAL(req->rq_data, 0); |
| 2582 | time = WVAL(req->rq_data, 2); |
| 2583 | fattr->f_ctime.tv_sec = date_dos2unix(server, date, time); |
| 2584 | fattr->f_ctime.tv_nsec = 0; |
| 2585 | |
| 2586 | date = WVAL(req->rq_data, 4); |
| 2587 | time = WVAL(req->rq_data, 6); |
| 2588 | fattr->f_atime.tv_sec = date_dos2unix(server, date, time); |
| 2589 | fattr->f_atime.tv_nsec = 0; |
| 2590 | |
| 2591 | date = WVAL(req->rq_data, 8); |
| 2592 | time = WVAL(req->rq_data, 10); |
| 2593 | fattr->f_mtime.tv_sec = date_dos2unix(server, date, time); |
| 2594 | fattr->f_mtime.tv_nsec = 0; |
| 2595 | VERBOSE("name=%s, date=%x, time=%x, mtime=%ld\n", |
| 2596 | mask, date, time, fattr->f_mtime); |
| 2597 | fattr->f_size = DVAL(req->rq_data, 12); |
| 2598 | /* ULONG allocation size */ |
| 2599 | fattr->attr = WVAL(req->rq_data, 20); |
| 2600 | result = 0; |
| 2601 | |
| 2602 | out_free: |
| 2603 | smb_rput(req); |
| 2604 | out: |
| 2605 | return result; |
| 2606 | } |
| 2607 | |
| 2608 | static int |
| 2609 | smb_proc_getattr_core(struct smb_sb_info *server, struct dentry *dir, |
| 2610 | struct smb_fattr *fattr) |
| 2611 | { |
| 2612 | int result; |
| 2613 | char *p; |
| 2614 | struct smb_request *req; |
| 2615 | |
| 2616 | result = -ENOMEM; |
| 2617 | if (! (req = smb_alloc_request(server, PAGE_SIZE))) |
| 2618 | goto out; |
| 2619 | |
| 2620 | p = smb_setup_header(req, SMBgetatr, 0, 0); |
| 2621 | result = smb_simple_encode_path(req, &p, dir, NULL); |
| 2622 | if (result < 0) |
| 2623 | goto out_free; |
| 2624 | smb_setup_bcc(req, p); |
| 2625 | |
| 2626 | if ((result = smb_request_ok(req, SMBgetatr, 10, 0)) < 0) |
| 2627 | goto out_free; |
| 2628 | fattr->attr = WVAL(req->rq_header, smb_vwv0); |
| 2629 | fattr->f_mtime.tv_sec = local2utc(server, DVAL(req->rq_header, smb_vwv1)); |
| 2630 | fattr->f_mtime.tv_nsec = 0; |
| 2631 | fattr->f_size = DVAL(req->rq_header, smb_vwv3); |
| 2632 | fattr->f_ctime = fattr->f_mtime; |
| 2633 | fattr->f_atime = fattr->f_mtime; |
| 2634 | #ifdef SMBFS_DEBUG_TIMESTAMP |
| 2635 | printk("getattr_core: %s/%s, mtime=%ld\n", |
| 2636 | DENTRY_PATH(dir), fattr->f_mtime); |
| 2637 | #endif |
| 2638 | result = 0; |
| 2639 | |
| 2640 | out_free: |
| 2641 | smb_rput(req); |
| 2642 | out: |
| 2643 | return result; |
| 2644 | } |
| 2645 | |
| 2646 | /* |
| 2647 | * Bugs Noted: |
| 2648 | * (1) Win 95 swaps the date and time fields in the standard info level. |
| 2649 | */ |
| 2650 | static int |
| 2651 | smb_proc_getattr_trans2(struct smb_sb_info *server, struct dentry *dir, |
| 2652 | struct smb_request *req, int infolevel) |
| 2653 | { |
| 2654 | char *p, *param; |
| 2655 | int result; |
| 2656 | |
| 2657 | param = req->rq_buffer; |
| 2658 | WSET(param, 0, infolevel); |
| 2659 | DSET(param, 2, 0); |
| 2660 | result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, dir, NULL); |
| 2661 | if (result < 0) |
| 2662 | goto out; |
| 2663 | p = param + 6 + result; |
| 2664 | |
| 2665 | req->rq_trans2_command = TRANSACT2_QPATHINFO; |
| 2666 | req->rq_ldata = 0; |
| 2667 | req->rq_data = NULL; |
| 2668 | req->rq_lparm = p - param; |
| 2669 | req->rq_parm = param; |
| 2670 | req->rq_flags = 0; |
| 2671 | result = smb_add_request(req); |
| 2672 | if (result < 0) |
| 2673 | goto out; |
| 2674 | if (req->rq_rcls != 0) { |
| 2675 | VERBOSE("for %s: result=%d, rcls=%d, err=%d\n", |
| 2676 | ¶m[6], result, req->rq_rcls, req->rq_err); |
| 2677 | result = smb_errno(req); |
| 2678 | goto out; |
| 2679 | } |
| 2680 | result = -ENOENT; |
| 2681 | if (req->rq_ldata < 22) { |
| 2682 | PARANOIA("not enough data for %s, len=%d\n", |
| 2683 | ¶m[6], req->rq_ldata); |
| 2684 | goto out; |
| 2685 | } |
| 2686 | |
| 2687 | result = 0; |
| 2688 | out: |
| 2689 | return result; |
| 2690 | } |
| 2691 | |
| 2692 | static int |
| 2693 | smb_proc_getattr_trans2_std(struct smb_sb_info *server, struct dentry *dir, |
| 2694 | struct smb_fattr *attr) |
| 2695 | { |
| 2696 | u16 date, time; |
| 2697 | int off_date = 0, off_time = 2; |
| 2698 | int result; |
| 2699 | struct smb_request *req; |
| 2700 | |
| 2701 | result = -ENOMEM; |
| 2702 | if (! (req = smb_alloc_request(server, PAGE_SIZE))) |
| 2703 | goto out; |
| 2704 | |
| 2705 | result = smb_proc_getattr_trans2(server, dir, req, SMB_INFO_STANDARD); |
| 2706 | if (result < 0) |
| 2707 | goto out_free; |
| 2708 | |
| 2709 | /* |
| 2710 | * Kludge alert: Win 95 swaps the date and time field, |
| 2711 | * contrary to the CIFS docs and Win NT practice. |
| 2712 | */ |
| 2713 | if (server->mnt->flags & SMB_MOUNT_WIN95) { |
| 2714 | off_date = 2; |
| 2715 | off_time = 0; |
| 2716 | } |
| 2717 | date = WVAL(req->rq_data, off_date); |
| 2718 | time = WVAL(req->rq_data, off_time); |
| 2719 | attr->f_ctime.tv_sec = date_dos2unix(server, date, time); |
| 2720 | attr->f_ctime.tv_nsec = 0; |
| 2721 | |
| 2722 | date = WVAL(req->rq_data, 4 + off_date); |
| 2723 | time = WVAL(req->rq_data, 4 + off_time); |
| 2724 | attr->f_atime.tv_sec = date_dos2unix(server, date, time); |
| 2725 | attr->f_atime.tv_nsec = 0; |
| 2726 | |
| 2727 | date = WVAL(req->rq_data, 8 + off_date); |
| 2728 | time = WVAL(req->rq_data, 8 + off_time); |
| 2729 | attr->f_mtime.tv_sec = date_dos2unix(server, date, time); |
| 2730 | attr->f_mtime.tv_nsec = 0; |
| 2731 | #ifdef SMBFS_DEBUG_TIMESTAMP |
| 2732 | printk(KERN_DEBUG "getattr_trans2: %s/%s, date=%x, time=%x, mtime=%ld\n", |
| 2733 | DENTRY_PATH(dir), date, time, attr->f_mtime); |
| 2734 | #endif |
| 2735 | attr->f_size = DVAL(req->rq_data, 12); |
| 2736 | attr->attr = WVAL(req->rq_data, 20); |
| 2737 | |
| 2738 | out_free: |
| 2739 | smb_rput(req); |
| 2740 | out: |
| 2741 | return result; |
| 2742 | } |
| 2743 | |
| 2744 | static int |
| 2745 | smb_proc_getattr_trans2_all(struct smb_sb_info *server, struct dentry *dir, |
| 2746 | struct smb_fattr *attr) |
| 2747 | { |
| 2748 | struct smb_request *req; |
| 2749 | int result; |
| 2750 | |
| 2751 | result = -ENOMEM; |
| 2752 | if (! (req = smb_alloc_request(server, PAGE_SIZE))) |
| 2753 | goto out; |
| 2754 | |
| 2755 | result = smb_proc_getattr_trans2(server, dir, req, |
| 2756 | SMB_QUERY_FILE_ALL_INFO); |
| 2757 | if (result < 0) |
| 2758 | goto out_free; |
| 2759 | |
| 2760 | attr->f_ctime = smb_ntutc2unixutc(LVAL(req->rq_data, 0)); |
| 2761 | attr->f_atime = smb_ntutc2unixutc(LVAL(req->rq_data, 8)); |
| 2762 | attr->f_mtime = smb_ntutc2unixutc(LVAL(req->rq_data, 16)); |
| 2763 | /* change (24) */ |
| 2764 | attr->attr = WVAL(req->rq_data, 32); |
| 2765 | /* pad? (34) */ |
| 2766 | /* allocated size (40) */ |
| 2767 | attr->f_size = LVAL(req->rq_data, 48); |
| 2768 | |
| 2769 | out_free: |
| 2770 | smb_rput(req); |
| 2771 | out: |
| 2772 | return result; |
| 2773 | } |
| 2774 | |
| 2775 | static int |
| 2776 | smb_proc_getattr_unix(struct smb_sb_info *server, struct dentry *dir, |
| 2777 | struct smb_fattr *attr) |
| 2778 | { |
| 2779 | struct smb_request *req; |
| 2780 | int result; |
| 2781 | |
| 2782 | result = -ENOMEM; |
| 2783 | if (! (req = smb_alloc_request(server, PAGE_SIZE))) |
| 2784 | goto out; |
| 2785 | |
| 2786 | result = smb_proc_getattr_trans2(server, dir, req, |
| 2787 | SMB_QUERY_FILE_UNIX_BASIC); |
| 2788 | if (result < 0) |
| 2789 | goto out_free; |
| 2790 | |
| 2791 | smb_decode_unix_basic(attr, server, req->rq_data); |
| 2792 | |
| 2793 | out_free: |
| 2794 | smb_rput(req); |
| 2795 | out: |
| 2796 | return result; |
| 2797 | } |
| 2798 | |
| 2799 | static int |
| 2800 | smb_proc_getattr_95(struct smb_sb_info *server, struct dentry *dir, |
| 2801 | struct smb_fattr *attr) |
| 2802 | { |
| 2803 | struct inode *inode = dir->d_inode; |
| 2804 | int result; |
| 2805 | |
| 2806 | /* FIXME: why not use the "all" version? */ |
| 2807 | result = smb_proc_getattr_trans2_std(server, dir, attr); |
| 2808 | if (result < 0) |
| 2809 | goto out; |
| 2810 | |
| 2811 | /* |
| 2812 | * None of the getattr versions here can make win9x return the right |
| 2813 | * filesize if there are changes made to an open file. |
| 2814 | * A seek-to-end does return the right size, but we only need to do |
| 2815 | * that on files we have written. |
| 2816 | */ |
| 2817 | if (inode && SMB_I(inode)->flags & SMB_F_LOCALWRITE && |
| 2818 | smb_is_open(inode)) |
| 2819 | { |
| 2820 | __u16 fileid = SMB_I(inode)->fileid; |
| 2821 | attr->f_size = smb_proc_seek(server, fileid, 2, 0); |
| 2822 | } |
| 2823 | |
| 2824 | out: |
| 2825 | return result; |
| 2826 | } |
| 2827 | |
| 2828 | static int |
| 2829 | smb_proc_ops_wait(struct smb_sb_info *server) |
| 2830 | { |
| 2831 | int result; |
| 2832 | |
| 2833 | result = wait_event_interruptible_timeout(server->conn_wq, |
| 2834 | server->conn_complete, 30*HZ); |
| 2835 | |
| 2836 | if (!result || signal_pending(current)) |
| 2837 | return -EIO; |
| 2838 | |
| 2839 | return 0; |
| 2840 | } |
| 2841 | |
| 2842 | static int |
| 2843 | smb_proc_getattr_null(struct smb_sb_info *server, struct dentry *dir, |
| 2844 | struct smb_fattr *fattr) |
| 2845 | { |
| 2846 | int result; |
| 2847 | |
| 2848 | if (smb_proc_ops_wait(server) < 0) |
| 2849 | return -EIO; |
| 2850 | |
| 2851 | smb_init_dirent(server, fattr); |
| 2852 | result = server->ops->getattr(server, dir, fattr); |
| 2853 | smb_finish_dirent(server, fattr); |
| 2854 | |
| 2855 | return result; |
| 2856 | } |
| 2857 | |
| 2858 | static int |
| 2859 | smb_proc_readdir_null(struct file *filp, void *dirent, filldir_t filldir, |
| 2860 | struct smb_cache_control *ctl) |
| 2861 | { |
| 2862 | struct smb_sb_info *server = server_from_dentry(filp->f_dentry); |
| 2863 | |
| 2864 | if (smb_proc_ops_wait(server) < 0) |
| 2865 | return -EIO; |
| 2866 | |
| 2867 | return server->ops->readdir(filp, dirent, filldir, ctl); |
| 2868 | } |
| 2869 | |
| 2870 | int |
| 2871 | smb_proc_getattr(struct dentry *dir, struct smb_fattr *fattr) |
| 2872 | { |
| 2873 | struct smb_sb_info *server = server_from_dentry(dir); |
| 2874 | int result; |
| 2875 | |
| 2876 | smb_init_dirent(server, fattr); |
| 2877 | result = server->ops->getattr(server, dir, fattr); |
| 2878 | smb_finish_dirent(server, fattr); |
| 2879 | |
| 2880 | return result; |
| 2881 | } |
| 2882 | |
| 2883 | |
| 2884 | /* |
| 2885 | * Because of bugs in the core protocol, we use this only to set |
| 2886 | * attributes. See smb_proc_settime() below for timestamp handling. |
| 2887 | * |
| 2888 | * Bugs Noted: |
| 2889 | * (1) If mtime is non-zero, both Win 3.1 and Win 95 fail |
| 2890 | * with an undocumented error (ERRDOS code 50). Setting |
| 2891 | * mtime to 0 allows the attributes to be set. |
| 2892 | * (2) The extra parameters following the name string aren't |
| 2893 | * in the CIFS docs, but seem to be necessary for operation. |
| 2894 | */ |
| 2895 | static int |
| 2896 | smb_proc_setattr_core(struct smb_sb_info *server, struct dentry *dentry, |
| 2897 | __u16 attr) |
| 2898 | { |
| 2899 | char *p; |
| 2900 | int result; |
| 2901 | struct smb_request *req; |
| 2902 | |
| 2903 | result = -ENOMEM; |
| 2904 | if (! (req = smb_alloc_request(server, PAGE_SIZE))) |
| 2905 | goto out; |
| 2906 | |
| 2907 | p = smb_setup_header(req, SMBsetatr, 8, 0); |
| 2908 | WSET(req->rq_header, smb_vwv0, attr); |
| 2909 | DSET(req->rq_header, smb_vwv1, 0); /* mtime */ |
| 2910 | WSET(req->rq_header, smb_vwv3, 0); /* reserved values */ |
| 2911 | WSET(req->rq_header, smb_vwv4, 0); |
| 2912 | WSET(req->rq_header, smb_vwv5, 0); |
| 2913 | WSET(req->rq_header, smb_vwv6, 0); |
| 2914 | WSET(req->rq_header, smb_vwv7, 0); |
| 2915 | result = smb_simple_encode_path(req, &p, dentry, NULL); |
| 2916 | if (result < 0) |
| 2917 | goto out_free; |
| 2918 | if (p + 2 > (char *)req->rq_buffer + req->rq_bufsize) { |
| 2919 | result = -ENAMETOOLONG; |
| 2920 | goto out_free; |
| 2921 | } |
| 2922 | *p++ = 4; |
| 2923 | *p++ = 0; |
| 2924 | smb_setup_bcc(req, p); |
| 2925 | |
| 2926 | result = smb_request_ok(req, SMBsetatr, 0, 0); |
| 2927 | if (result < 0) |
| 2928 | goto out_free; |
| 2929 | result = 0; |
| 2930 | |
| 2931 | out_free: |
| 2932 | smb_rput(req); |
| 2933 | out: |
| 2934 | return result; |
| 2935 | } |
| 2936 | |
| 2937 | /* |
| 2938 | * Because of bugs in the trans2 setattr messages, we must set |
| 2939 | * attributes and timestamps separately. The core SMBsetatr |
| 2940 | * message seems to be the only reliable way to set attributes. |
| 2941 | */ |
| 2942 | int |
| 2943 | smb_proc_setattr(struct dentry *dir, struct smb_fattr *fattr) |
| 2944 | { |
| 2945 | struct smb_sb_info *server = server_from_dentry(dir); |
| 2946 | int result; |
| 2947 | |
| 2948 | VERBOSE("setting %s/%s, open=%d\n", |
| 2949 | DENTRY_PATH(dir), smb_is_open(dir->d_inode)); |
| 2950 | result = smb_proc_setattr_core(server, dir, fattr->attr); |
| 2951 | return result; |
| 2952 | } |
| 2953 | |
| 2954 | /* |
| 2955 | * Sets the timestamps for an file open with write permissions. |
| 2956 | */ |
| 2957 | static int |
| 2958 | smb_proc_setattr_ext(struct smb_sb_info *server, |
| 2959 | struct inode *inode, struct smb_fattr *fattr) |
| 2960 | { |
| 2961 | __u16 date, time; |
| 2962 | int result; |
| 2963 | struct smb_request *req; |
| 2964 | |
| 2965 | result = -ENOMEM; |
| 2966 | if (! (req = smb_alloc_request(server, 0))) |
| 2967 | goto out; |
| 2968 | |
| 2969 | smb_setup_header(req, SMBsetattrE, 7, 0); |
| 2970 | WSET(req->rq_header, smb_vwv0, SMB_I(inode)->fileid); |
| 2971 | /* We don't change the creation time */ |
| 2972 | WSET(req->rq_header, smb_vwv1, 0); |
| 2973 | WSET(req->rq_header, smb_vwv2, 0); |
| 2974 | date_unix2dos(server, fattr->f_atime.tv_sec, &date, &time); |
| 2975 | WSET(req->rq_header, smb_vwv3, date); |
| 2976 | WSET(req->rq_header, smb_vwv4, time); |
| 2977 | date_unix2dos(server, fattr->f_mtime.tv_sec, &date, &time); |
| 2978 | WSET(req->rq_header, smb_vwv5, date); |
| 2979 | WSET(req->rq_header, smb_vwv6, time); |
| 2980 | #ifdef SMBFS_DEBUG_TIMESTAMP |
| 2981 | printk(KERN_DEBUG "smb_proc_setattr_ext: date=%d, time=%d, mtime=%ld\n", |
| 2982 | date, time, fattr->f_mtime); |
| 2983 | #endif |
| 2984 | |
| 2985 | req->rq_flags |= SMB_REQ_NORETRY; |
| 2986 | result = smb_request_ok(req, SMBsetattrE, 0, 0); |
| 2987 | if (result < 0) |
| 2988 | goto out_free; |
| 2989 | result = 0; |
| 2990 | out_free: |
| 2991 | smb_rput(req); |
| 2992 | out: |
| 2993 | return result; |
| 2994 | } |
| 2995 | |
| 2996 | /* |
| 2997 | * Bugs Noted: |
| 2998 | * (1) The TRANSACT2_SETPATHINFO message under Win NT 4.0 doesn't |
| 2999 | * set the file's attribute flags. |
| 3000 | */ |
| 3001 | static int |
| 3002 | smb_proc_setattr_trans2(struct smb_sb_info *server, |
| 3003 | struct dentry *dir, struct smb_fattr *fattr) |
| 3004 | { |
| 3005 | __u16 date, time; |
| 3006 | char *p, *param; |
| 3007 | int result; |
| 3008 | char data[26]; |
| 3009 | struct smb_request *req; |
| 3010 | |
| 3011 | result = -ENOMEM; |
| 3012 | if (! (req = smb_alloc_request(server, PAGE_SIZE))) |
| 3013 | goto out; |
| 3014 | param = req->rq_buffer; |
| 3015 | |
| 3016 | WSET(param, 0, 1); /* Info level SMB_INFO_STANDARD */ |
| 3017 | DSET(param, 2, 0); |
| 3018 | result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, dir, NULL); |
| 3019 | if (result < 0) |
| 3020 | goto out_free; |
| 3021 | p = param + 6 + result; |
| 3022 | |
| 3023 | WSET(data, 0, 0); /* creation time */ |
| 3024 | WSET(data, 2, 0); |
| 3025 | date_unix2dos(server, fattr->f_atime.tv_sec, &date, &time); |
| 3026 | WSET(data, 4, date); |
| 3027 | WSET(data, 6, time); |
| 3028 | date_unix2dos(server, fattr->f_mtime.tv_sec, &date, &time); |
| 3029 | WSET(data, 8, date); |
| 3030 | WSET(data, 10, time); |
| 3031 | #ifdef SMBFS_DEBUG_TIMESTAMP |
| 3032 | printk(KERN_DEBUG "setattr_trans2: %s/%s, date=%x, time=%x, mtime=%ld\n", |
| 3033 | DENTRY_PATH(dir), date, time, fattr->f_mtime); |
| 3034 | #endif |
| 3035 | DSET(data, 12, 0); /* size */ |
| 3036 | DSET(data, 16, 0); /* blksize */ |
| 3037 | WSET(data, 20, 0); /* attr */ |
| 3038 | DSET(data, 22, 0); /* ULONG EA size */ |
| 3039 | |
| 3040 | req->rq_trans2_command = TRANSACT2_SETPATHINFO; |
| 3041 | req->rq_ldata = 26; |
| 3042 | req->rq_data = data; |
| 3043 | req->rq_lparm = p - param; |
| 3044 | req->rq_parm = param; |
| 3045 | req->rq_flags = 0; |
| 3046 | result = smb_add_request(req); |
| 3047 | if (result < 0) |
| 3048 | goto out_free; |
| 3049 | result = 0; |
| 3050 | if (req->rq_rcls != 0) |
| 3051 | result = smb_errno(req); |
| 3052 | |
| 3053 | out_free: |
| 3054 | smb_rput(req); |
| 3055 | out: |
| 3056 | return result; |
| 3057 | } |
| 3058 | |
| 3059 | /* |
| 3060 | * ATTR_MODE 0x001 |
| 3061 | * ATTR_UID 0x002 |
| 3062 | * ATTR_GID 0x004 |
| 3063 | * ATTR_SIZE 0x008 |
| 3064 | * ATTR_ATIME 0x010 |
| 3065 | * ATTR_MTIME 0x020 |
| 3066 | * ATTR_CTIME 0x040 |
| 3067 | * ATTR_ATIME_SET 0x080 |
| 3068 | * ATTR_MTIME_SET 0x100 |
| 3069 | * ATTR_FORCE 0x200 |
| 3070 | * ATTR_ATTR_FLAG 0x400 |
| 3071 | * |
| 3072 | * major/minor should only be set by mknod. |
| 3073 | */ |
| 3074 | int |
| 3075 | smb_proc_setattr_unix(struct dentry *d, struct iattr *attr, |
| 3076 | unsigned int major, unsigned int minor) |
| 3077 | { |
| 3078 | struct smb_sb_info *server = server_from_dentry(d); |
| 3079 | u64 nttime; |
| 3080 | char *p, *param; |
| 3081 | int result; |
| 3082 | char data[100]; |
| 3083 | struct smb_request *req; |
| 3084 | |
| 3085 | result = -ENOMEM; |
| 3086 | if (! (req = smb_alloc_request(server, PAGE_SIZE))) |
| 3087 | goto out; |
| 3088 | param = req->rq_buffer; |
| 3089 | |
| 3090 | DEBUG1("valid flags = 0x%04x\n", attr->ia_valid); |
| 3091 | |
| 3092 | WSET(param, 0, SMB_SET_FILE_UNIX_BASIC); |
| 3093 | DSET(param, 2, 0); |
| 3094 | result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, d, NULL); |
| 3095 | if (result < 0) |
| 3096 | goto out_free; |
| 3097 | p = param + 6 + result; |
| 3098 | |
| 3099 | /* 0 L file size in bytes */ |
| 3100 | /* 8 L file size on disk in bytes (block count) */ |
| 3101 | /* 40 L uid */ |
| 3102 | /* 48 L gid */ |
| 3103 | /* 56 W file type enum */ |
| 3104 | /* 60 L devmajor */ |
| 3105 | /* 68 L devminor */ |
| 3106 | /* 76 L unique ID (inode) */ |
| 3107 | /* 84 L permissions */ |
| 3108 | /* 92 L link count */ |
| 3109 | LSET(data, 0, SMB_SIZE_NO_CHANGE); |
| 3110 | LSET(data, 8, SMB_SIZE_NO_CHANGE); |
| 3111 | LSET(data, 16, SMB_TIME_NO_CHANGE); |
| 3112 | LSET(data, 24, SMB_TIME_NO_CHANGE); |
| 3113 | LSET(data, 32, SMB_TIME_NO_CHANGE); |
| 3114 | LSET(data, 40, SMB_UID_NO_CHANGE); |
| 3115 | LSET(data, 48, SMB_GID_NO_CHANGE); |
Maciej W. Rozycki | ac34dd0 | 2006-01-08 01:04:50 -0800 | [diff] [blame] | 3116 | DSET(data, 56, smb_filetype_from_mode(attr->ia_mode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3117 | LSET(data, 60, major); |
| 3118 | LSET(data, 68, minor); |
| 3119 | LSET(data, 76, 0); |
| 3120 | LSET(data, 84, SMB_MODE_NO_CHANGE); |
| 3121 | LSET(data, 92, 0); |
| 3122 | |
| 3123 | if (attr->ia_valid & ATTR_SIZE) { |
| 3124 | LSET(data, 0, attr->ia_size); |
| 3125 | LSET(data, 8, 0); /* can't set anyway */ |
| 3126 | } |
| 3127 | |
| 3128 | /* |
| 3129 | * FIXME: check the conversion function it the correct one |
| 3130 | * |
| 3131 | * we can't set ctime but we might as well pass this to the server |
| 3132 | * and let it ignore it. |
| 3133 | */ |
| 3134 | if (attr->ia_valid & ATTR_CTIME) { |
| 3135 | nttime = smb_unixutc2ntutc(attr->ia_ctime); |
| 3136 | LSET(data, 16, nttime); |
| 3137 | } |
| 3138 | if (attr->ia_valid & ATTR_ATIME) { |
| 3139 | nttime = smb_unixutc2ntutc(attr->ia_atime); |
| 3140 | LSET(data, 24, nttime); |
| 3141 | } |
| 3142 | if (attr->ia_valid & ATTR_MTIME) { |
| 3143 | nttime = smb_unixutc2ntutc(attr->ia_mtime); |
| 3144 | LSET(data, 32, nttime); |
| 3145 | } |
| 3146 | |
| 3147 | if (attr->ia_valid & ATTR_UID) { |
| 3148 | LSET(data, 40, attr->ia_uid); |
| 3149 | } |
| 3150 | if (attr->ia_valid & ATTR_GID) { |
| 3151 | LSET(data, 48, attr->ia_gid); |
| 3152 | } |
| 3153 | |
| 3154 | if (attr->ia_valid & ATTR_MODE) { |
| 3155 | LSET(data, 84, attr->ia_mode); |
| 3156 | } |
| 3157 | |
| 3158 | req->rq_trans2_command = TRANSACT2_SETPATHINFO; |
| 3159 | req->rq_ldata = 100; |
| 3160 | req->rq_data = data; |
| 3161 | req->rq_lparm = p - param; |
| 3162 | req->rq_parm = param; |
| 3163 | req->rq_flags = 0; |
| 3164 | result = smb_add_request(req); |
| 3165 | |
| 3166 | out_free: |
| 3167 | smb_rput(req); |
| 3168 | out: |
| 3169 | return result; |
| 3170 | } |
| 3171 | |
| 3172 | |
| 3173 | /* |
| 3174 | * Set the modify and access timestamps for a file. |
| 3175 | * |
| 3176 | * Incredibly enough, in all of SMB there is no message to allow |
| 3177 | * setting both attributes and timestamps at once. |
| 3178 | * |
| 3179 | * Bugs Noted: |
| 3180 | * (1) Win 95 doesn't support the TRANSACT2_SETFILEINFO message |
| 3181 | * with info level 1 (INFO_STANDARD). |
| 3182 | * (2) Win 95 seems not to support setting directory timestamps. |
| 3183 | * (3) Under the core protocol apparently the only way to set the |
| 3184 | * timestamp is to open and close the file. |
| 3185 | */ |
| 3186 | int |
| 3187 | smb_proc_settime(struct dentry *dentry, struct smb_fattr *fattr) |
| 3188 | { |
| 3189 | struct smb_sb_info *server = server_from_dentry(dentry); |
| 3190 | struct inode *inode = dentry->d_inode; |
| 3191 | int result; |
| 3192 | |
| 3193 | VERBOSE("setting %s/%s, open=%d\n", |
| 3194 | DENTRY_PATH(dentry), smb_is_open(inode)); |
| 3195 | |
| 3196 | /* setting the time on a Win95 server fails (tridge) */ |
| 3197 | if (server->opt.protocol >= SMB_PROTOCOL_LANMAN2 && |
| 3198 | !(server->mnt->flags & SMB_MOUNT_WIN95)) { |
| 3199 | if (smb_is_open(inode) && SMB_I(inode)->access != SMB_O_RDONLY) |
| 3200 | result = smb_proc_setattr_ext(server, inode, fattr); |
| 3201 | else |
| 3202 | result = smb_proc_setattr_trans2(server, dentry, fattr); |
| 3203 | } else { |
| 3204 | /* |
| 3205 | * Fail silently on directories ... timestamp can't be set? |
| 3206 | */ |
| 3207 | result = 0; |
| 3208 | if (S_ISREG(inode->i_mode)) { |
| 3209 | /* |
| 3210 | * Set the mtime by opening and closing the file. |
| 3211 | * Note that the file is opened read-only, but this |
| 3212 | * still allows us to set the date (tridge) |
| 3213 | */ |
| 3214 | result = -EACCES; |
| 3215 | if (!smb_is_open(inode)) |
| 3216 | smb_proc_open(server, dentry, SMB_O_RDONLY); |
| 3217 | if (smb_is_open(inode)) { |
| 3218 | inode->i_mtime = fattr->f_mtime; |
| 3219 | result = smb_proc_close_inode(server, inode); |
| 3220 | } |
| 3221 | } |
| 3222 | } |
| 3223 | |
| 3224 | return result; |
| 3225 | } |
| 3226 | |
| 3227 | int |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 3228 | smb_proc_dskattr(struct dentry *dentry, struct kstatfs *attr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3229 | { |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 3230 | struct smb_sb_info *server = SMB_SB(dentry->d_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3231 | int result; |
| 3232 | char *p; |
| 3233 | long unit; |
| 3234 | struct smb_request *req; |
| 3235 | |
| 3236 | result = -ENOMEM; |
| 3237 | if (! (req = smb_alloc_request(server, 0))) |
| 3238 | goto out; |
| 3239 | |
| 3240 | smb_setup_header(req, SMBdskattr, 0, 0); |
| 3241 | if ((result = smb_request_ok(req, SMBdskattr, 5, 0)) < 0) |
| 3242 | goto out_free; |
| 3243 | p = SMB_VWV(req->rq_header); |
| 3244 | unit = (WVAL(p, 2) * WVAL(p, 4)) >> SMB_ST_BLKSHIFT; |
| 3245 | attr->f_blocks = WVAL(p, 0) * unit; |
| 3246 | attr->f_bsize = SMB_ST_BLKSIZE; |
| 3247 | attr->f_bavail = attr->f_bfree = WVAL(p, 6) * unit; |
| 3248 | result = 0; |
| 3249 | |
| 3250 | out_free: |
| 3251 | smb_rput(req); |
| 3252 | out: |
| 3253 | return result; |
| 3254 | } |
| 3255 | |
| 3256 | int |
| 3257 | smb_proc_read_link(struct smb_sb_info *server, struct dentry *d, |
| 3258 | char *buffer, int len) |
| 3259 | { |
| 3260 | char *p, *param; |
| 3261 | int result; |
| 3262 | struct smb_request *req; |
| 3263 | |
| 3264 | DEBUG1("readlink of %s/%s\n", DENTRY_PATH(d)); |
| 3265 | |
| 3266 | result = -ENOMEM; |
| 3267 | if (! (req = smb_alloc_request(server, PAGE_SIZE))) |
| 3268 | goto out; |
| 3269 | param = req->rq_buffer; |
| 3270 | |
| 3271 | WSET(param, 0, SMB_QUERY_FILE_UNIX_LINK); |
| 3272 | DSET(param, 2, 0); |
| 3273 | result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, d, NULL); |
| 3274 | if (result < 0) |
| 3275 | goto out_free; |
| 3276 | p = param + 6 + result; |
| 3277 | |
| 3278 | req->rq_trans2_command = TRANSACT2_QPATHINFO; |
| 3279 | req->rq_ldata = 0; |
| 3280 | req->rq_data = NULL; |
| 3281 | req->rq_lparm = p - param; |
| 3282 | req->rq_parm = param; |
| 3283 | req->rq_flags = 0; |
| 3284 | result = smb_add_request(req); |
| 3285 | if (result < 0) |
| 3286 | goto out_free; |
| 3287 | DEBUG1("for %s: result=%d, rcls=%d, err=%d\n", |
| 3288 | ¶m[6], result, req->rq_rcls, req->rq_err); |
| 3289 | |
| 3290 | /* copy data up to the \0 or buffer length */ |
| 3291 | result = len; |
| 3292 | if (req->rq_ldata < len) |
| 3293 | result = req->rq_ldata; |
| 3294 | strncpy(buffer, req->rq_data, result); |
| 3295 | |
| 3296 | out_free: |
| 3297 | smb_rput(req); |
| 3298 | out: |
| 3299 | return result; |
| 3300 | } |
| 3301 | |
| 3302 | |
| 3303 | /* |
| 3304 | * Create a symlink object called dentry which points to oldpath. |
| 3305 | * Samba does not permit dangling links but returns a suitable error message. |
| 3306 | */ |
| 3307 | int |
| 3308 | smb_proc_symlink(struct smb_sb_info *server, struct dentry *d, |
| 3309 | const char *oldpath) |
| 3310 | { |
| 3311 | char *p, *param; |
| 3312 | int result; |
| 3313 | struct smb_request *req; |
| 3314 | |
| 3315 | result = -ENOMEM; |
| 3316 | if (! (req = smb_alloc_request(server, PAGE_SIZE))) |
| 3317 | goto out; |
| 3318 | param = req->rq_buffer; |
| 3319 | |
| 3320 | WSET(param, 0, SMB_SET_FILE_UNIX_LINK); |
| 3321 | DSET(param, 2, 0); |
| 3322 | result = smb_encode_path(server, param + 6, SMB_MAXPATHLEN+1, d, NULL); |
| 3323 | if (result < 0) |
| 3324 | goto out_free; |
| 3325 | p = param + 6 + result; |
| 3326 | |
| 3327 | req->rq_trans2_command = TRANSACT2_SETPATHINFO; |
| 3328 | req->rq_ldata = strlen(oldpath) + 1; |
| 3329 | req->rq_data = (char *) oldpath; |
| 3330 | req->rq_lparm = p - param; |
| 3331 | req->rq_parm = param; |
| 3332 | req->rq_flags = 0; |
| 3333 | result = smb_add_request(req); |
| 3334 | if (result < 0) |
| 3335 | goto out_free; |
| 3336 | |
| 3337 | DEBUG1("for %s: result=%d, rcls=%d, err=%d\n", |
| 3338 | ¶m[6], result, req->rq_rcls, req->rq_err); |
| 3339 | result = 0; |
| 3340 | |
| 3341 | out_free: |
| 3342 | smb_rput(req); |
| 3343 | out: |
| 3344 | return result; |
| 3345 | } |
| 3346 | |
| 3347 | /* |
| 3348 | * Create a hard link object called new_dentry which points to dentry. |
| 3349 | */ |
| 3350 | int |
| 3351 | smb_proc_link(struct smb_sb_info *server, struct dentry *dentry, |
| 3352 | struct dentry *new_dentry) |
| 3353 | { |
| 3354 | char *p, *param; |
| 3355 | int result; |
| 3356 | struct smb_request *req; |
| 3357 | |
| 3358 | result = -ENOMEM; |
| 3359 | if (! (req = smb_alloc_request(server, PAGE_SIZE))) |
| 3360 | goto out; |
| 3361 | param = req->rq_buffer; |
| 3362 | |
| 3363 | WSET(param, 0, SMB_SET_FILE_UNIX_HLINK); |
| 3364 | DSET(param, 2, 0); |
| 3365 | result = smb_encode_path(server, param + 6, SMB_MAXPATHLEN+1, |
| 3366 | new_dentry, NULL); |
| 3367 | if (result < 0) |
| 3368 | goto out_free; |
| 3369 | p = param + 6 + result; |
| 3370 | |
| 3371 | /* Grr, pointless separation of parameters and data ... */ |
| 3372 | req->rq_data = p; |
| 3373 | req->rq_ldata = smb_encode_path(server, p, SMB_MAXPATHLEN+1, |
| 3374 | dentry, NULL); |
| 3375 | |
| 3376 | req->rq_trans2_command = TRANSACT2_SETPATHINFO; |
| 3377 | req->rq_lparm = p - param; |
| 3378 | req->rq_parm = param; |
| 3379 | req->rq_flags = 0; |
| 3380 | result = smb_add_request(req); |
| 3381 | if (result < 0) |
| 3382 | goto out_free; |
| 3383 | |
| 3384 | DEBUG1("for %s: result=%d, rcls=%d, err=%d\n", |
| 3385 | ¶m[6], result, req->rq_rcls, req->rq_err); |
| 3386 | result = 0; |
| 3387 | |
| 3388 | out_free: |
| 3389 | smb_rput(req); |
| 3390 | out: |
| 3391 | return result; |
| 3392 | } |
| 3393 | |
| 3394 | static int |
| 3395 | smb_proc_query_cifsunix(struct smb_sb_info *server) |
| 3396 | { |
| 3397 | int result; |
| 3398 | int major, minor; |
| 3399 | u64 caps; |
| 3400 | char param[2]; |
| 3401 | struct smb_request *req; |
| 3402 | |
| 3403 | result = -ENOMEM; |
| 3404 | if (! (req = smb_alloc_request(server, 100))) |
| 3405 | goto out; |
| 3406 | |
| 3407 | WSET(param, 0, SMB_QUERY_CIFS_UNIX_INFO); |
| 3408 | |
| 3409 | req->rq_trans2_command = TRANSACT2_QFSINFO; |
| 3410 | req->rq_ldata = 0; |
| 3411 | req->rq_data = NULL; |
| 3412 | req->rq_lparm = 2; |
| 3413 | req->rq_parm = param; |
| 3414 | req->rq_flags = 0; |
| 3415 | result = smb_add_request(req); |
| 3416 | if (result < 0) |
| 3417 | goto out_free; |
| 3418 | |
| 3419 | if (req->rq_ldata < 12) { |
| 3420 | PARANOIA("Not enough data\n"); |
| 3421 | goto out_free; |
| 3422 | } |
| 3423 | major = WVAL(req->rq_data, 0); |
| 3424 | minor = WVAL(req->rq_data, 2); |
| 3425 | |
| 3426 | DEBUG1("Server implements CIFS Extensions for UNIX systems v%d.%d\n", |
| 3427 | major, minor); |
| 3428 | /* FIXME: verify that we are ok with this major/minor? */ |
| 3429 | |
| 3430 | caps = LVAL(req->rq_data, 4); |
| 3431 | DEBUG1("Server capabilities 0x%016llx\n", caps); |
| 3432 | |
| 3433 | out_free: |
| 3434 | smb_rput(req); |
| 3435 | out: |
| 3436 | return result; |
| 3437 | } |
| 3438 | |
| 3439 | |
| 3440 | static void |
| 3441 | install_ops(struct smb_ops *dst, struct smb_ops *src) |
| 3442 | { |
| 3443 | memcpy(dst, src, sizeof(void *) * SMB_OPS_NUM_STATIC); |
| 3444 | } |
| 3445 | |
| 3446 | /* < LANMAN2 */ |
| 3447 | static struct smb_ops smb_ops_core = |
| 3448 | { |
| 3449 | .read = smb_proc_read, |
| 3450 | .write = smb_proc_write, |
| 3451 | .readdir = smb_proc_readdir_short, |
| 3452 | .getattr = smb_proc_getattr_core, |
| 3453 | .truncate = smb_proc_trunc32, |
| 3454 | }; |
| 3455 | |
| 3456 | /* LANMAN2, OS/2, others? */ |
| 3457 | static struct smb_ops smb_ops_os2 = |
| 3458 | { |
| 3459 | .read = smb_proc_read, |
| 3460 | .write = smb_proc_write, |
| 3461 | .readdir = smb_proc_readdir_long, |
| 3462 | .getattr = smb_proc_getattr_trans2_std, |
| 3463 | .truncate = smb_proc_trunc32, |
| 3464 | }; |
| 3465 | |
| 3466 | /* Win95, and possibly some NetApp versions too */ |
| 3467 | static struct smb_ops smb_ops_win95 = |
| 3468 | { |
| 3469 | .read = smb_proc_read, /* does not support 12word readX */ |
| 3470 | .write = smb_proc_write, |
| 3471 | .readdir = smb_proc_readdir_long, |
| 3472 | .getattr = smb_proc_getattr_95, |
| 3473 | .truncate = smb_proc_trunc95, |
| 3474 | }; |
| 3475 | |
| 3476 | /* Samba, NT4 and NT5 */ |
| 3477 | static struct smb_ops smb_ops_winNT = |
| 3478 | { |
| 3479 | .read = smb_proc_readX, |
| 3480 | .write = smb_proc_writeX, |
| 3481 | .readdir = smb_proc_readdir_long, |
| 3482 | .getattr = smb_proc_getattr_trans2_all, |
| 3483 | .truncate = smb_proc_trunc64, |
| 3484 | }; |
| 3485 | |
| 3486 | /* Samba w/ unix extensions. Others? */ |
| 3487 | static struct smb_ops smb_ops_unix = |
| 3488 | { |
| 3489 | .read = smb_proc_readX, |
| 3490 | .write = smb_proc_writeX, |
| 3491 | .readdir = smb_proc_readdir_long, |
| 3492 | .getattr = smb_proc_getattr_unix, |
| 3493 | /* FIXME: core/ext/time setattr needs to be cleaned up! */ |
| 3494 | /* .setattr = smb_proc_setattr_unix, */ |
| 3495 | .truncate = smb_proc_trunc64, |
| 3496 | }; |
| 3497 | |
| 3498 | /* Place holder until real ops are in place */ |
| 3499 | static struct smb_ops smb_ops_null = |
| 3500 | { |
| 3501 | .readdir = smb_proc_readdir_null, |
| 3502 | .getattr = smb_proc_getattr_null, |
| 3503 | }; |
| 3504 | |
| 3505 | void smb_install_null_ops(struct smb_ops *ops) |
| 3506 | { |
| 3507 | install_ops(ops, &smb_ops_null); |
| 3508 | } |