4 * Directory search handling
6 * Copyright (C) International Business Machines Corp., 2004, 2008
7 * Author(s): Steve French (sfrench@us.ibm.com)
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <linux/pagemap.h>
25 #include <linux/slab.h>
26 #include <linux/stat.h>
29 #include "cifsproto.h"
30 #include "cifs_unicode.h"
31 #include "cifs_debug.h"
32 #include "cifs_fs_sb.h"
36 * To be safe - for UCS to UTF-8 with strings loaded with the rare long
37 * characters alloc more to account for such multibyte target UTF-8
40 #define UNICODE_NAME_MAX ((4 * NAME_MAX) + 2)
42 #ifdef CONFIG_CIFS_DEBUG2
43 static void dump_cifs_file_struct(struct file *file, char *label)
45 struct cifsFileInfo *cf;
48 cf = file->private_data;
50 cFYI(1, ("empty cifs private file data"));
53 if (cf->invalidHandle)
54 cFYI(1, ("invalid handle"));
55 if (cf->srch_inf.endOfSearch)
56 cFYI(1, ("end of search"));
57 if (cf->srch_inf.emptyDir)
58 cFYI(1, ("empty dir"));
62 static inline void dump_cifs_file_struct(struct file *file, char *label)
68 * Find the dentry that matches "name". If there isn't one, create one. If it's
69 * a negative dentry or the uniqueid changed, then drop it and recreate it.
71 static struct dentry *
72 cifs_readdir_lookup(struct dentry *parent, struct qstr *name,
73 struct cifs_fattr *fattr)
75 struct dentry *dentry, *alias;
77 struct super_block *sb = parent->d_inode->i_sb;
79 cFYI(1, ("For %s", name->name));
81 if (parent->d_op && parent->d_op->d_hash)
82 parent->d_op->d_hash(parent, name);
84 name->hash = full_name_hash(name->name, name->len);
86 dentry = d_lookup(parent, name);
88 /* FIXME: check for inode number changes? */
89 if (dentry->d_inode != NULL)
95 dentry = d_alloc(parent, name);
99 inode = cifs_iget(sb, fattr);
105 if (CIFS_SB(sb)->tcon->nocase)
106 dentry->d_op = &cifs_ci_dentry_ops;
108 dentry->d_op = &cifs_dentry_ops;
110 alias = d_materialise_unique(dentry, inode);
122 cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb)
124 fattr->cf_uid = cifs_sb->mnt_uid;
125 fattr->cf_gid = cifs_sb->mnt_gid;
127 if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
128 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
129 fattr->cf_dtype = DT_DIR;
131 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
132 fattr->cf_dtype = DT_REG;
135 if (fattr->cf_cifsattrs & ATTR_READONLY)
136 fattr->cf_mode &= ~S_IWUGO;
138 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL &&
139 fattr->cf_cifsattrs & ATTR_SYSTEM) {
140 if (fattr->cf_eof == 0) {
141 fattr->cf_mode &= ~S_IFMT;
142 fattr->cf_mode |= S_IFIFO;
143 fattr->cf_dtype = DT_FIFO;
146 * trying to get the type and mode via SFU can be slow,
147 * so just call those regular files for now, and mark
150 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
156 cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info,
157 struct cifs_sb_info *cifs_sb)
159 memset(fattr, 0, sizeof(*fattr));
160 fattr->cf_cifsattrs = le32_to_cpu(info->ExtFileAttributes);
161 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
162 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
163 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
164 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
165 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
167 cifs_fill_common_info(fattr, cifs_sb);
171 cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info,
172 struct cifs_sb_info *cifs_sb)
174 int offset = cifs_sb->tcon->ses->server->timeAdj;
176 memset(fattr, 0, sizeof(*fattr));
177 fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate,
178 info->LastAccessTime, offset);
179 fattr->cf_ctime = cnvrtDosUnixTm(info->LastWriteDate,
180 info->LastWriteTime, offset);
181 fattr->cf_mtime = cnvrtDosUnixTm(info->LastWriteDate,
182 info->LastWriteTime, offset);
184 fattr->cf_cifsattrs = le16_to_cpu(info->Attributes);
185 fattr->cf_bytes = le32_to_cpu(info->AllocationSize);
186 fattr->cf_eof = le32_to_cpu(info->DataSize);
188 cifs_fill_common_info(fattr, cifs_sb);
191 /* BB eventually need to add the following helper function to
192 resolve NT_STATUS_STOPPED_ON_SYMLINK return code when
193 we try to do FindFirst on (NTFS) directory symlinks */
195 int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
202 struct cifsTconInfo *ptcon = cifs_sb->tcon;
205 rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ,
206 OPEN_REPARSE_POINT, &fid, &oplock, NULL,
208 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
210 tmpbuffer = kmalloc(maxpath);
211 rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path,
216 if (CIFSSMBClose(xid, ptcon, fid)) {
217 cFYI(1, ("Error closing temporary reparsepoint open)"));
223 static int initiate_cifs_search(const int xid, struct file *file)
227 struct cifsFileInfo *cifsFile;
228 struct cifs_sb_info *cifs_sb;
229 struct cifsTconInfo *pTcon;
231 if (file->private_data == NULL) {
233 kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
236 if (file->private_data == NULL)
238 cifsFile = file->private_data;
239 cifsFile->invalidHandle = true;
240 cifsFile->srch_inf.endOfSearch = false;
242 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
246 pTcon = cifs_sb->tcon;
250 full_path = build_path_from_dentry(file->f_path.dentry);
252 if (full_path == NULL)
255 cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos));
258 /* test for Unix extensions */
259 /* but now check for them on the share/mount not on the SMB session */
260 /* if (pTcon->ses->capabilities & CAP_UNIX) { */
262 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
263 else if ((pTcon->ses->capabilities &
264 (CAP_NT_SMBS | CAP_NT_FIND)) == 0) {
265 cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
266 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
267 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
268 } else /* not srvinos - BB fixme add check for backlevel? */ {
269 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
272 rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls,
273 &cifsFile->netfid, &cifsFile->srch_inf,
274 cifs_sb->mnt_cifs_flags &
275 CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
277 cifsFile->invalidHandle = false;
278 /* BB add following call to handle readdir on new NTFS symlink errors
279 else if STATUS_STOPPED_ON_SYMLINK
280 call get_symlink_reparse_path and retry with new path */
281 else if ((rc == -EOPNOTSUPP) &&
282 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
283 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
290 /* return length of unicode string in bytes */
291 static int cifs_unicode_bytelen(char *str)
294 __le16 *ustr = (__le16 *)str;
296 for (len = 0; len <= PATH_MAX; len++) {
300 cFYI(1, ("Unicode string longer than PATH_MAX found"));
304 static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
307 FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
309 if (level == SMB_FIND_FILE_INFO_STANDARD) {
310 FIND_FILE_STANDARD_INFO *pfData;
311 pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
313 new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
314 pfData->FileNameLength;
316 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
317 cFYI(1, ("new entry %p old entry %p", new_entry, old_entry));
318 /* validate that new_entry is not past end of SMB */
319 if (new_entry >= end_of_smb) {
321 ("search entry %p began after end of SMB %p old entry %p",
322 new_entry, end_of_smb, old_entry));
324 } else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
325 (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb))
326 || ((level != SMB_FIND_FILE_INFO_STANDARD) &&
327 (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
328 cERROR(1, ("search entry %p extends after end of SMB %p",
329 new_entry, end_of_smb));
336 #define UNICODE_DOT cpu_to_le16(0x2e)
338 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
339 static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile)
342 char *filename = NULL;
345 if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) {
346 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
347 filename = &pFindData->FileName[0];
348 if (cfile->srch_inf.unicode) {
349 len = cifs_unicode_bytelen(filename);
351 /* BB should we make this strnlen of PATH_MAX? */
352 len = strnlen(filename, 5);
354 } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) {
355 FILE_DIRECTORY_INFO *pFindData =
356 (FILE_DIRECTORY_INFO *)current_entry;
357 filename = &pFindData->FileName[0];
358 len = le32_to_cpu(pFindData->FileNameLength);
359 } else if (cfile->srch_inf.info_level ==
360 SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
361 FILE_FULL_DIRECTORY_INFO *pFindData =
362 (FILE_FULL_DIRECTORY_INFO *)current_entry;
363 filename = &pFindData->FileName[0];
364 len = le32_to_cpu(pFindData->FileNameLength);
365 } else if (cfile->srch_inf.info_level ==
366 SMB_FIND_FILE_ID_FULL_DIR_INFO) {
367 SEARCH_ID_FULL_DIR_INFO *pFindData =
368 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
369 filename = &pFindData->FileName[0];
370 len = le32_to_cpu(pFindData->FileNameLength);
371 } else if (cfile->srch_inf.info_level ==
372 SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
373 FILE_BOTH_DIRECTORY_INFO *pFindData =
374 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
375 filename = &pFindData->FileName[0];
376 len = le32_to_cpu(pFindData->FileNameLength);
377 } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) {
378 FIND_FILE_STANDARD_INFO *pFindData =
379 (FIND_FILE_STANDARD_INFO *)current_entry;
380 filename = &pFindData->FileName[0];
381 len = pFindData->FileNameLength;
383 cFYI(1, ("Unknown findfirst level %d",
384 cfile->srch_inf.info_level));
388 if (cfile->srch_inf.unicode) {
389 __le16 *ufilename = (__le16 *)filename;
392 if (ufilename[0] == UNICODE_DOT)
394 } else if (len == 4) {
396 if ((ufilename[0] == UNICODE_DOT)
397 && (ufilename[1] == UNICODE_DOT))
402 if (filename[0] == '.')
404 } else if (len == 2) {
405 if ((filename[0] == '.') && (filename[1] == '.'))
414 /* Check if directory that we are searching has changed so we can decide
415 whether we can use the cached search results from the previous search */
416 static int is_dir_changed(struct file *file)
418 struct inode *inode = file->f_path.dentry->d_inode;
419 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
421 if (cifsInfo->time == 0)
422 return 1; /* directory was changed, perhaps due to unlink */
428 static int cifs_save_resume_key(const char *current_entry,
429 struct cifsFileInfo *cifsFile)
432 unsigned int len = 0;
436 if ((cifsFile == NULL) || (current_entry == NULL))
439 level = cifsFile->srch_inf.info_level;
441 if (level == SMB_FIND_FILE_UNIX) {
442 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
444 filename = &pFindData->FileName[0];
445 if (cifsFile->srch_inf.unicode) {
446 len = cifs_unicode_bytelen(filename);
448 /* BB should we make this strnlen of PATH_MAX? */
449 len = strnlen(filename, PATH_MAX);
451 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
452 } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {
453 FILE_DIRECTORY_INFO *pFindData =
454 (FILE_DIRECTORY_INFO *)current_entry;
455 filename = &pFindData->FileName[0];
456 len = le32_to_cpu(pFindData->FileNameLength);
457 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
458 } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
459 FILE_FULL_DIRECTORY_INFO *pFindData =
460 (FILE_FULL_DIRECTORY_INFO *)current_entry;
461 filename = &pFindData->FileName[0];
462 len = le32_to_cpu(pFindData->FileNameLength);
463 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
464 } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
465 SEARCH_ID_FULL_DIR_INFO *pFindData =
466 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
467 filename = &pFindData->FileName[0];
468 len = le32_to_cpu(pFindData->FileNameLength);
469 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
470 } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
471 FILE_BOTH_DIRECTORY_INFO *pFindData =
472 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
473 filename = &pFindData->FileName[0];
474 len = le32_to_cpu(pFindData->FileNameLength);
475 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
476 } else if (level == SMB_FIND_FILE_INFO_STANDARD) {
477 FIND_FILE_STANDARD_INFO *pFindData =
478 (FIND_FILE_STANDARD_INFO *)current_entry;
479 filename = &pFindData->FileName[0];
480 /* one byte length, no name conversion */
481 len = (unsigned int)pFindData->FileNameLength;
482 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
484 cFYI(1, ("Unknown findfirst level %d", level));
487 cifsFile->srch_inf.resume_name_len = len;
488 cifsFile->srch_inf.presume_name = filename;
492 /* find the corresponding entry in the search */
493 /* Note that the SMB server returns search entries for . and .. which
494 complicates logic here if we choose to parse for them and we do not
495 assume that they are located in the findfirst return buffer.*/
496 /* We start counting in the buffer with entry 2 and increment for every
497 entry (do not increment for . or .. entry) */
498 static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
499 struct file *file, char **ppCurrentEntry, int *num_to_ret)
503 loff_t first_entry_in_buffer;
504 loff_t index_to_find = file->f_pos;
505 struct cifsFileInfo *cifsFile = file->private_data;
506 /* check if index in the buffer */
508 if ((cifsFile == NULL) || (ppCurrentEntry == NULL) ||
509 (num_to_ret == NULL))
512 *ppCurrentEntry = NULL;
513 first_entry_in_buffer =
514 cifsFile->srch_inf.index_of_last_entry -
515 cifsFile->srch_inf.entries_in_buffer;
517 /* if first entry in buf is zero then is first buffer
518 in search response data which means it is likely . and ..
519 will be in this buffer, although some servers do not return
520 . and .. for the root of a drive and for those we need
521 to start two entries earlier */
523 dump_cifs_file_struct(file, "In fce ");
524 if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) &&
525 is_dir_changed(file)) ||
526 (index_to_find < first_entry_in_buffer)) {
527 /* close and restart search */
528 cFYI(1, ("search backing up - close and restart search"));
529 write_lock(&GlobalSMBSeslock);
530 if (!cifsFile->srch_inf.endOfSearch &&
531 !cifsFile->invalidHandle) {
532 cifsFile->invalidHandle = true;
533 write_unlock(&GlobalSMBSeslock);
534 CIFSFindClose(xid, pTcon, cifsFile->netfid);
536 write_unlock(&GlobalSMBSeslock);
537 if (cifsFile->srch_inf.ntwrk_buf_start) {
538 cFYI(1, ("freeing SMB ff cache buf on search rewind"));
539 if (cifsFile->srch_inf.smallBuf)
540 cifs_small_buf_release(cifsFile->srch_inf.
543 cifs_buf_release(cifsFile->srch_inf.
545 cifsFile->srch_inf.ntwrk_buf_start = NULL;
547 rc = initiate_cifs_search(xid, file);
549 cFYI(1, ("error %d reinitiating a search on rewind",
553 cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
556 while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
557 (rc == 0) && !cifsFile->srch_inf.endOfSearch) {
558 cFYI(1, ("calling findnext2"));
559 rc = CIFSFindNext(xid, pTcon, cifsFile->netfid,
560 &cifsFile->srch_inf);
561 cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
565 if (index_to_find < cifsFile->srch_inf.index_of_last_entry) {
566 /* we found the buffer that contains the entry */
567 /* scan and find it */
570 char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
571 smbCalcSize((struct smb_hdr *)
572 cifsFile->srch_inf.ntwrk_buf_start);
574 current_entry = cifsFile->srch_inf.srch_entries_start;
575 first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
576 - cifsFile->srch_inf.entries_in_buffer;
577 pos_in_buf = index_to_find - first_entry_in_buffer;
578 cFYI(1, ("found entry - pos_in_buf %d", pos_in_buf));
580 for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) {
581 /* go entry by entry figuring out which is first */
582 current_entry = nxt_dir_entry(current_entry, end_of_smb,
583 cifsFile->srch_inf.info_level);
585 if ((current_entry == NULL) && (i < pos_in_buf)) {
586 /* BB fixme - check if we should flag this error */
587 cERROR(1, ("reached end of buf searching for pos in buf"
588 " %d index to find %lld rc %d",
589 pos_in_buf, index_to_find, rc));
592 *ppCurrentEntry = current_entry;
594 cFYI(1, ("index not in buffer - could not findnext into it"));
598 if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
599 cFYI(1, ("can not return entries pos_in_buf beyond last"));
602 *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
607 /* inode num, inode type and filename returned */
608 static int cifs_get_name_from_search_buf(struct qstr *pqst,
609 char *current_entry, __u16 level, unsigned int unicode,
610 struct cifs_sb_info *cifs_sb, unsigned int max_len, __u64 *pinum)
613 unsigned int len = 0;
615 struct nls_table *nlt = cifs_sb->local_nls;
619 if (level == SMB_FIND_FILE_UNIX) {
620 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
622 filename = &pFindData->FileName[0];
624 len = cifs_unicode_bytelen(filename);
626 /* BB should we make this strnlen of PATH_MAX? */
627 len = strnlen(filename, PATH_MAX);
630 *pinum = le64_to_cpu(pFindData->basic.UniqueId);
631 } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {
632 FILE_DIRECTORY_INFO *pFindData =
633 (FILE_DIRECTORY_INFO *)current_entry;
634 filename = &pFindData->FileName[0];
635 len = le32_to_cpu(pFindData->FileNameLength);
636 } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
637 FILE_FULL_DIRECTORY_INFO *pFindData =
638 (FILE_FULL_DIRECTORY_INFO *)current_entry;
639 filename = &pFindData->FileName[0];
640 len = le32_to_cpu(pFindData->FileNameLength);
641 } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
642 SEARCH_ID_FULL_DIR_INFO *pFindData =
643 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
644 filename = &pFindData->FileName[0];
645 len = le32_to_cpu(pFindData->FileNameLength);
646 *pinum = le64_to_cpu(pFindData->UniqueId);
647 } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
648 FILE_BOTH_DIRECTORY_INFO *pFindData =
649 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
650 filename = &pFindData->FileName[0];
651 len = le32_to_cpu(pFindData->FileNameLength);
652 } else if (level == SMB_FIND_FILE_INFO_STANDARD) {
653 FIND_FILE_STANDARD_INFO *pFindData =
654 (FIND_FILE_STANDARD_INFO *)current_entry;
655 filename = &pFindData->FileName[0];
656 /* one byte length, no name conversion */
657 len = (unsigned int)pFindData->FileNameLength;
659 cFYI(1, ("Unknown findfirst level %d", level));
664 cERROR(1, ("bad search response length %d past smb end", len));
669 pqst->len = cifs_from_ucs2((char *) pqst->name,
672 min(len, max_len), nlt,
673 cifs_sb->mnt_cifs_flags &
674 CIFS_MOUNT_MAP_SPECIAL_CHR);
675 pqst->len -= nls_nullsize(nlt);
677 pqst->name = filename;
683 static int cifs_filldir(char *pfindEntry, struct file *file, filldir_t filldir,
684 void *direntry, char *scratch_buf, unsigned int max_len)
688 struct cifsFileInfo *pCifsF;
691 struct super_block *sb;
692 struct cifs_sb_info *cifs_sb;
693 struct dentry *tmp_dentry;
694 struct cifs_fattr fattr;
696 /* get filename and len into qstring */
698 /* decide whether to create and populate ionde */
699 if ((direntry == NULL) || (file == NULL))
702 pCifsF = file->private_data;
704 if ((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL))
707 rc = cifs_entry_is_dot(pfindEntry, pCifsF);
708 /* skip . and .. since we added them first */
712 sb = file->f_path.dentry->d_sb;
713 cifs_sb = CIFS_SB(sb);
715 qstring.name = scratch_buf;
716 rc = cifs_get_name_from_search_buf(&qstring, pfindEntry,
717 pCifsF->srch_inf.info_level,
718 pCifsF->srch_inf.unicode, cifs_sb,
719 max_len, &inum /* returned */);
724 if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX)
725 cifs_unix_basic_to_fattr(&fattr,
726 &((FILE_UNIX_INFO *) pfindEntry)->basic,
728 else if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD)
729 cifs_std_info_to_fattr(&fattr, (FIND_FILE_STANDARD_INFO *)
730 pfindEntry, cifs_sb);
732 cifs_dir_info_to_fattr(&fattr, (FILE_DIRECTORY_INFO *)
733 pfindEntry, cifs_sb);
735 if (inum && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
736 fattr.cf_uniqueid = inum;
738 fattr.cf_uniqueid = iunique(sb, ROOT_I);
739 cifs_autodisable_serverino(cifs_sb);
742 ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid);
743 tmp_dentry = cifs_readdir_lookup(file->f_dentry, &qstring, &fattr);
745 rc = filldir(direntry, qstring.name, qstring.len, file->f_pos,
746 ino, fattr.cf_dtype);
749 * we can not return filldir errors to the caller since they are
750 * "normal" when the stat blocksize is too small - we return remapped
753 * FIXME: This looks bogus. filldir returns -EOVERFLOW in the above
754 * case already. Why should we be clobbering other errors from it?
757 cFYI(1, ("filldir rc = %d", rc));
765 int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
769 struct cifs_sb_info *cifs_sb;
770 struct cifsTconInfo *pTcon;
771 struct cifsFileInfo *cifsFile = NULL;
774 char *tmp_buf = NULL;
776 unsigned int max_len;
780 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
781 pTcon = cifs_sb->tcon;
785 switch ((int) file->f_pos) {
787 if (filldir(direntry, ".", 1, file->f_pos,
788 file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) {
789 cERROR(1, ("Filldir for current dir failed"));
795 if (filldir(direntry, "..", 2, file->f_pos,
796 file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
797 cERROR(1, ("Filldir for parent dir failed"));
803 /* 1) If search is active,
804 is in current search buffer?
805 if it before then restart search
806 if after then keep searching till find it */
808 if (file->private_data == NULL) {
809 rc = initiate_cifs_search(xid, file);
810 cFYI(1, ("initiate cifs search rc %d", rc));
816 if (file->private_data == NULL) {
821 cifsFile = file->private_data;
822 if (cifsFile->srch_inf.endOfSearch) {
823 if (cifsFile->srch_inf.emptyDir) {
824 cFYI(1, ("End of search, empty dir"));
829 cifsFile->invalidHandle = true;
830 CIFSFindClose(xid, pTcon, cifsFile->netfid);
833 rc = find_cifs_entry(xid, pTcon, file,
834 ¤t_entry, &num_to_fill);
836 cFYI(1, ("fce error %d", rc));
838 } else if (current_entry != NULL) {
839 cFYI(1, ("entry %lld found", file->f_pos));
841 cFYI(1, ("could not find entry"));
844 cFYI(1, ("loop through %d times filling dir for net buf %p",
845 num_to_fill, cifsFile->srch_inf.ntwrk_buf_start));
846 max_len = smbCalcSize((struct smb_hdr *)
847 cifsFile->srch_inf.ntwrk_buf_start);
848 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
850 tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL);
851 for (i = 0; (i < num_to_fill) && (rc == 0); i++) {
852 if (current_entry == NULL) {
853 /* evaluate whether this case is an error */
854 cERROR(1, ("past SMB end, num to fill %d i %d",
858 /* if buggy server returns . and .. late do
859 we want to check for that here? */
860 rc = cifs_filldir(current_entry, file,
861 filldir, direntry, tmp_buf, max_len);
862 if (rc == -EOVERFLOW) {
869 cifsFile->srch_inf.index_of_last_entry) {
870 cFYI(1, ("last entry in buf at pos %lld %s",
871 file->f_pos, tmp_buf));
872 cifs_save_resume_key(current_entry, cifsFile);
876 nxt_dir_entry(current_entry, end_of_smb,
877 cifsFile->srch_inf.info_level);