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)
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, parent->d_inode, name);
84 name->hash = full_name_hash(name->name, name->len);
86 dentry = d_lookup(parent, name);
88 inode = dentry->d_inode;
89 /* update inode in place if i_ino didn't change */
90 if (inode && CIFS_I(inode)->uniqueid == fattr->cf_uniqueid) {
91 cifs_fattr_to_inode(inode, fattr);
98 dentry = d_alloc(parent, name);
102 inode = cifs_iget(sb, fattr);
108 alias = d_materialise_unique(dentry, inode);
120 cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb)
122 fattr->cf_uid = cifs_sb->mnt_uid;
123 fattr->cf_gid = cifs_sb->mnt_gid;
125 if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
126 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
127 fattr->cf_dtype = DT_DIR;
129 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
130 fattr->cf_dtype = DT_REG;
133 if (fattr->cf_cifsattrs & ATTR_READONLY)
134 fattr->cf_mode &= ~S_IWUGO;
136 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL &&
137 fattr->cf_cifsattrs & ATTR_SYSTEM) {
138 if (fattr->cf_eof == 0) {
139 fattr->cf_mode &= ~S_IFMT;
140 fattr->cf_mode |= S_IFIFO;
141 fattr->cf_dtype = DT_FIFO;
144 * trying to get the type and mode via SFU can be slow,
145 * so just call those regular files for now, and mark
148 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
154 cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info,
155 struct cifs_sb_info *cifs_sb)
157 memset(fattr, 0, sizeof(*fattr));
158 fattr->cf_cifsattrs = le32_to_cpu(info->ExtFileAttributes);
159 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
160 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
161 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
162 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
163 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
164 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
166 cifs_fill_common_info(fattr, cifs_sb);
170 cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info,
171 struct cifs_sb_info *cifs_sb)
173 int offset = cifs_sb_master_tcon(cifs_sb)->ses->server->timeAdj;
175 memset(fattr, 0, sizeof(*fattr));
176 fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate,
177 info->LastAccessTime, offset);
178 fattr->cf_ctime = cnvrtDosUnixTm(info->LastWriteDate,
179 info->LastWriteTime, offset);
180 fattr->cf_mtime = cnvrtDosUnixTm(info->LastWriteDate,
181 info->LastWriteTime, offset);
183 fattr->cf_cifsattrs = le16_to_cpu(info->Attributes);
184 fattr->cf_bytes = le32_to_cpu(info->AllocationSize);
185 fattr->cf_eof = le32_to_cpu(info->DataSize);
187 cifs_fill_common_info(fattr, cifs_sb);
190 /* BB eventually need to add the following helper function to
191 resolve NT_STATUS_STOPPED_ON_SYMLINK return code when
192 we try to do FindFirst on (NTFS) directory symlinks */
194 int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
201 struct cifs_tcon *ptcon = cifs_sb_tcon(cifs_sb);
204 rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ,
205 OPEN_REPARSE_POINT, &fid, &oplock, NULL,
207 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
209 tmpbuffer = kmalloc(maxpath);
210 rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path,
215 if (CIFSSMBClose(xid, ptcon, fid)) {
216 cFYI(1, "Error closing temporary reparsepoint open");
222 static int initiate_cifs_search(const int xid, struct file *file)
225 char *full_path = NULL;
226 struct cifsFileInfo *cifsFile;
227 struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
228 struct tcon_link *tlink = NULL;
229 struct cifs_tcon *pTcon;
231 if (file->private_data == NULL) {
232 tlink = cifs_sb_tlink(cifs_sb);
234 return PTR_ERR(tlink);
236 cifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
237 if (cifsFile == NULL) {
241 file->private_data = cifsFile;
242 cifsFile->tlink = cifs_get_tlink(tlink);
243 pTcon = tlink_tcon(tlink);
245 cifsFile = file->private_data;
246 pTcon = tlink_tcon(cifsFile->tlink);
249 cifsFile->invalidHandle = true;
250 cifsFile->srch_inf.endOfSearch = false;
252 full_path = build_path_from_dentry(file->f_path.dentry);
253 if (full_path == NULL) {
258 cFYI(1, "Full path: %s start at: %lld", full_path, file->f_pos);
261 /* test for Unix extensions */
262 /* but now check for them on the share/mount not on the SMB session */
263 /* if (pTcon->ses->capabilities & CAP_UNIX) { */
265 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
266 else if ((pTcon->ses->capabilities &
267 (CAP_NT_SMBS | CAP_NT_FIND)) == 0) {
268 cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
269 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
270 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
271 } else /* not srvinos - BB fixme add check for backlevel? */ {
272 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
275 rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls,
276 &cifsFile->netfid, &cifsFile->srch_inf,
277 cifs_sb->mnt_cifs_flags &
278 CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
280 cifsFile->invalidHandle = false;
281 /* BB add following call to handle readdir on new NTFS symlink errors
282 else if STATUS_STOPPED_ON_SYMLINK
283 call get_symlink_reparse_path and retry with new path */
284 else if ((rc == -EOPNOTSUPP) &&
285 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
286 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
291 cifs_put_tlink(tlink);
295 /* return length of unicode string in bytes */
296 static int cifs_unicode_bytelen(char *str)
299 __le16 *ustr = (__le16 *)str;
301 for (len = 0; len <= PATH_MAX; len++) {
305 cFYI(1, "Unicode string longer than PATH_MAX found");
309 static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
312 FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
314 if (level == SMB_FIND_FILE_INFO_STANDARD) {
315 FIND_FILE_STANDARD_INFO *pfData;
316 pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
318 new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
319 pfData->FileNameLength;
321 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
322 cFYI(1, "new entry %p old entry %p", new_entry, old_entry);
323 /* validate that new_entry is not past end of SMB */
324 if (new_entry >= end_of_smb) {
325 cERROR(1, "search entry %p began after end of SMB %p old entry %p",
326 new_entry, end_of_smb, old_entry);
328 } else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
329 (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb))
330 || ((level != SMB_FIND_FILE_INFO_STANDARD) &&
331 (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
332 cERROR(1, "search entry %p extends after end of SMB %p",
333 new_entry, end_of_smb);
340 #define UNICODE_DOT cpu_to_le16(0x2e)
342 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
343 static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile)
346 char *filename = NULL;
349 if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) {
350 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
351 filename = &pFindData->FileName[0];
352 if (cfile->srch_inf.unicode) {
353 len = cifs_unicode_bytelen(filename);
355 /* BB should we make this strnlen of PATH_MAX? */
356 len = strnlen(filename, 5);
358 } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) {
359 FILE_DIRECTORY_INFO *pFindData =
360 (FILE_DIRECTORY_INFO *)current_entry;
361 filename = &pFindData->FileName[0];
362 len = le32_to_cpu(pFindData->FileNameLength);
363 } else if (cfile->srch_inf.info_level ==
364 SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
365 FILE_FULL_DIRECTORY_INFO *pFindData =
366 (FILE_FULL_DIRECTORY_INFO *)current_entry;
367 filename = &pFindData->FileName[0];
368 len = le32_to_cpu(pFindData->FileNameLength);
369 } else if (cfile->srch_inf.info_level ==
370 SMB_FIND_FILE_ID_FULL_DIR_INFO) {
371 SEARCH_ID_FULL_DIR_INFO *pFindData =
372 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
373 filename = &pFindData->FileName[0];
374 len = le32_to_cpu(pFindData->FileNameLength);
375 } else if (cfile->srch_inf.info_level ==
376 SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
377 FILE_BOTH_DIRECTORY_INFO *pFindData =
378 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
379 filename = &pFindData->FileName[0];
380 len = le32_to_cpu(pFindData->FileNameLength);
381 } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) {
382 FIND_FILE_STANDARD_INFO *pFindData =
383 (FIND_FILE_STANDARD_INFO *)current_entry;
384 filename = &pFindData->FileName[0];
385 len = pFindData->FileNameLength;
387 cFYI(1, "Unknown findfirst level %d",
388 cfile->srch_inf.info_level);
392 if (cfile->srch_inf.unicode) {
393 __le16 *ufilename = (__le16 *)filename;
396 if (ufilename[0] == UNICODE_DOT)
398 } else if (len == 4) {
400 if ((ufilename[0] == UNICODE_DOT)
401 && (ufilename[1] == UNICODE_DOT))
406 if (filename[0] == '.')
408 } else if (len == 2) {
409 if ((filename[0] == '.') && (filename[1] == '.'))
418 /* Check if directory that we are searching has changed so we can decide
419 whether we can use the cached search results from the previous search */
420 static int is_dir_changed(struct file *file)
422 struct inode *inode = file->f_path.dentry->d_inode;
423 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
425 if (cifsInfo->time == 0)
426 return 1; /* directory was changed, perhaps due to unlink */
432 static int cifs_save_resume_key(const char *current_entry,
433 struct cifsFileInfo *cifsFile)
436 unsigned int len = 0;
440 if ((cifsFile == NULL) || (current_entry == NULL))
443 level = cifsFile->srch_inf.info_level;
445 if (level == SMB_FIND_FILE_UNIX) {
446 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
448 filename = &pFindData->FileName[0];
449 if (cifsFile->srch_inf.unicode) {
450 len = cifs_unicode_bytelen(filename);
452 /* BB should we make this strnlen of PATH_MAX? */
453 len = strnlen(filename, PATH_MAX);
455 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
456 } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {
457 FILE_DIRECTORY_INFO *pFindData =
458 (FILE_DIRECTORY_INFO *)current_entry;
459 filename = &pFindData->FileName[0];
460 len = le32_to_cpu(pFindData->FileNameLength);
461 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
462 } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
463 FILE_FULL_DIRECTORY_INFO *pFindData =
464 (FILE_FULL_DIRECTORY_INFO *)current_entry;
465 filename = &pFindData->FileName[0];
466 len = le32_to_cpu(pFindData->FileNameLength);
467 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
468 } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
469 SEARCH_ID_FULL_DIR_INFO *pFindData =
470 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
471 filename = &pFindData->FileName[0];
472 len = le32_to_cpu(pFindData->FileNameLength);
473 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
474 } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
475 FILE_BOTH_DIRECTORY_INFO *pFindData =
476 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
477 filename = &pFindData->FileName[0];
478 len = le32_to_cpu(pFindData->FileNameLength);
479 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
480 } else if (level == SMB_FIND_FILE_INFO_STANDARD) {
481 FIND_FILE_STANDARD_INFO *pFindData =
482 (FIND_FILE_STANDARD_INFO *)current_entry;
483 filename = &pFindData->FileName[0];
484 /* one byte length, no name conversion */
485 len = (unsigned int)pFindData->FileNameLength;
486 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
488 cFYI(1, "Unknown findfirst level %d", level);
491 cifsFile->srch_inf.resume_name_len = len;
492 cifsFile->srch_inf.presume_name = filename;
496 /* find the corresponding entry in the search */
497 /* Note that the SMB server returns search entries for . and .. which
498 complicates logic here if we choose to parse for them and we do not
499 assume that they are located in the findfirst return buffer.*/
500 /* We start counting in the buffer with entry 2 and increment for every
501 entry (do not increment for . or .. entry) */
502 static int find_cifs_entry(const int xid, struct cifs_tcon *pTcon,
503 struct file *file, char **ppCurrentEntry, int *num_to_ret)
507 loff_t first_entry_in_buffer;
508 loff_t index_to_find = file->f_pos;
509 struct cifsFileInfo *cifsFile = file->private_data;
510 /* check if index in the buffer */
512 if ((cifsFile == NULL) || (ppCurrentEntry == NULL) ||
513 (num_to_ret == NULL))
516 *ppCurrentEntry = NULL;
517 first_entry_in_buffer =
518 cifsFile->srch_inf.index_of_last_entry -
519 cifsFile->srch_inf.entries_in_buffer;
521 /* if first entry in buf is zero then is first buffer
522 in search response data which means it is likely . and ..
523 will be in this buffer, although some servers do not return
524 . and .. for the root of a drive and for those we need
525 to start two entries earlier */
527 dump_cifs_file_struct(file, "In fce ");
528 if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) &&
529 is_dir_changed(file)) ||
530 (index_to_find < first_entry_in_buffer)) {
531 /* close and restart search */
532 cFYI(1, "search backing up - close and restart search");
533 spin_lock(&cifs_file_list_lock);
534 if (!cifsFile->srch_inf.endOfSearch &&
535 !cifsFile->invalidHandle) {
536 cifsFile->invalidHandle = true;
537 spin_unlock(&cifs_file_list_lock);
538 CIFSFindClose(xid, pTcon, cifsFile->netfid);
540 spin_unlock(&cifs_file_list_lock);
541 if (cifsFile->srch_inf.ntwrk_buf_start) {
542 cFYI(1, "freeing SMB ff cache buf on search rewind");
543 if (cifsFile->srch_inf.smallBuf)
544 cifs_small_buf_release(cifsFile->srch_inf.
547 cifs_buf_release(cifsFile->srch_inf.
549 cifsFile->srch_inf.ntwrk_buf_start = NULL;
551 rc = initiate_cifs_search(xid, file);
553 cFYI(1, "error %d reinitiating a search on rewind",
557 cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
560 while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
561 (rc == 0) && !cifsFile->srch_inf.endOfSearch) {
562 cFYI(1, "calling findnext2");
563 rc = CIFSFindNext(xid, pTcon, cifsFile->netfid,
564 &cifsFile->srch_inf);
565 cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
569 if (index_to_find < cifsFile->srch_inf.index_of_last_entry) {
570 /* we found the buffer that contains the entry */
571 /* scan and find it */
574 char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
575 smbCalcSize((struct smb_hdr *)
576 cifsFile->srch_inf.ntwrk_buf_start);
578 current_entry = cifsFile->srch_inf.srch_entries_start;
579 first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
580 - cifsFile->srch_inf.entries_in_buffer;
581 pos_in_buf = index_to_find - first_entry_in_buffer;
582 cFYI(1, "found entry - pos_in_buf %d", pos_in_buf);
584 for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) {
585 /* go entry by entry figuring out which is first */
586 current_entry = nxt_dir_entry(current_entry, end_of_smb,
587 cifsFile->srch_inf.info_level);
589 if ((current_entry == NULL) && (i < pos_in_buf)) {
590 /* BB fixme - check if we should flag this error */
591 cERROR(1, "reached end of buf searching for pos in buf"
592 " %d index to find %lld rc %d",
593 pos_in_buf, index_to_find, rc);
596 *ppCurrentEntry = current_entry;
598 cFYI(1, "index not in buffer - could not findnext into it");
602 if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
603 cFYI(1, "can not return entries pos_in_buf beyond last");
606 *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
611 /* inode num, inode type and filename returned */
612 static int cifs_get_name_from_search_buf(struct qstr *pqst,
613 char *current_entry, __u16 level, unsigned int unicode,
614 struct cifs_sb_info *cifs_sb, unsigned int max_len, __u64 *pinum)
617 unsigned int len = 0;
619 struct nls_table *nlt = cifs_sb->local_nls;
623 if (level == SMB_FIND_FILE_UNIX) {
624 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
626 filename = &pFindData->FileName[0];
628 len = cifs_unicode_bytelen(filename);
630 /* BB should we make this strnlen of PATH_MAX? */
631 len = strnlen(filename, PATH_MAX);
634 *pinum = le64_to_cpu(pFindData->basic.UniqueId);
635 } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {
636 FILE_DIRECTORY_INFO *pFindData =
637 (FILE_DIRECTORY_INFO *)current_entry;
638 filename = &pFindData->FileName[0];
639 len = le32_to_cpu(pFindData->FileNameLength);
640 } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
641 FILE_FULL_DIRECTORY_INFO *pFindData =
642 (FILE_FULL_DIRECTORY_INFO *)current_entry;
643 filename = &pFindData->FileName[0];
644 len = le32_to_cpu(pFindData->FileNameLength);
645 } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
646 SEARCH_ID_FULL_DIR_INFO *pFindData =
647 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
648 filename = &pFindData->FileName[0];
649 len = le32_to_cpu(pFindData->FileNameLength);
650 *pinum = le64_to_cpu(pFindData->UniqueId);
651 } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
652 FILE_BOTH_DIRECTORY_INFO *pFindData =
653 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
654 filename = &pFindData->FileName[0];
655 len = le32_to_cpu(pFindData->FileNameLength);
656 } else if (level == SMB_FIND_FILE_INFO_STANDARD) {
657 FIND_FILE_STANDARD_INFO *pFindData =
658 (FIND_FILE_STANDARD_INFO *)current_entry;
659 filename = &pFindData->FileName[0];
660 /* one byte length, no name conversion */
661 len = (unsigned int)pFindData->FileNameLength;
663 cFYI(1, "Unknown findfirst level %d", level);
668 cERROR(1, "bad search response length %d past smb end", len);
673 pqst->len = cifs_from_ucs2((char *) pqst->name,
676 min(len, max_len), nlt,
677 cifs_sb->mnt_cifs_flags &
678 CIFS_MOUNT_MAP_SPECIAL_CHR);
679 pqst->len -= nls_nullsize(nlt);
681 pqst->name = filename;
687 static int cifs_filldir(char *pfindEntry, struct file *file, filldir_t filldir,
688 void *direntry, char *scratch_buf, unsigned int max_len)
692 struct cifsFileInfo *pCifsF;
695 struct super_block *sb;
696 struct cifs_sb_info *cifs_sb;
697 struct dentry *tmp_dentry;
698 struct cifs_fattr fattr;
700 /* get filename and len into qstring */
702 /* decide whether to create and populate ionde */
703 if ((direntry == NULL) || (file == NULL))
706 pCifsF = file->private_data;
708 if ((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL))
711 rc = cifs_entry_is_dot(pfindEntry, pCifsF);
712 /* skip . and .. since we added them first */
716 sb = file->f_path.dentry->d_sb;
717 cifs_sb = CIFS_SB(sb);
719 qstring.name = scratch_buf;
720 rc = cifs_get_name_from_search_buf(&qstring, pfindEntry,
721 pCifsF->srch_inf.info_level,
722 pCifsF->srch_inf.unicode, cifs_sb,
723 max_len, &inum /* returned */);
728 if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX)
729 cifs_unix_basic_to_fattr(&fattr,
730 &((FILE_UNIX_INFO *) pfindEntry)->basic,
732 else if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD)
733 cifs_std_info_to_fattr(&fattr, (FIND_FILE_STANDARD_INFO *)
734 pfindEntry, cifs_sb);
736 cifs_dir_info_to_fattr(&fattr, (FILE_DIRECTORY_INFO *)
737 pfindEntry, cifs_sb);
739 if (inum && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
740 fattr.cf_uniqueid = inum;
742 fattr.cf_uniqueid = iunique(sb, ROOT_I);
743 cifs_autodisable_serverino(cifs_sb);
746 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) &&
747 CIFSCouldBeMFSymlink(&fattr))
749 * trying to get the type and mode can be slow,
750 * so just call those regular files for now, and mark
753 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
755 ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid);
756 tmp_dentry = cifs_readdir_lookup(file->f_dentry, &qstring, &fattr);
758 rc = filldir(direntry, qstring.name, qstring.len, file->f_pos,
759 ino, fattr.cf_dtype);
766 int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
770 struct cifs_tcon *pTcon;
771 struct cifsFileInfo *cifsFile = NULL;
774 char *tmp_buf = NULL;
776 unsigned int max_len;
781 * Ensure FindFirst doesn't fail before doing filldir() for '.' and
782 * '..'. Otherwise we won't be able to notify VFS in case of failure.
784 if (file->private_data == NULL) {
785 rc = initiate_cifs_search(xid, file);
786 cFYI(1, "initiate cifs search rc %d", rc);
791 switch ((int) file->f_pos) {
793 if (filldir(direntry, ".", 1, file->f_pos,
794 file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) {
795 cERROR(1, "Filldir for current dir failed");
801 if (filldir(direntry, "..", 2, file->f_pos,
802 file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
803 cERROR(1, "Filldir for parent dir failed");
809 /* 1) If search is active,
810 is in current search buffer?
811 if it before then restart search
812 if after then keep searching till find it */
814 if (file->private_data == NULL) {
819 cifsFile = file->private_data;
820 if (cifsFile->srch_inf.endOfSearch) {
821 if (cifsFile->srch_inf.emptyDir) {
822 cFYI(1, "End of search, empty dir");
827 cifsFile->invalidHandle = true;
828 CIFSFindClose(xid, pTcon, cifsFile->netfid);
831 pTcon = tlink_tcon(cifsFile->tlink);
832 rc = find_cifs_entry(xid, pTcon, file,
833 ¤t_entry, &num_to_fill);
835 cFYI(1, "fce error %d", rc);
837 } else if (current_entry != NULL) {
838 cFYI(1, "entry %lld found", file->f_pos);
840 cFYI(1, "could not find entry");
843 cFYI(1, "loop through %d times filling dir for net buf %p",
844 num_to_fill, cifsFile->srch_inf.ntwrk_buf_start);
845 max_len = smbCalcSize((struct smb_hdr *)
846 cifsFile->srch_inf.ntwrk_buf_start);
847 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
849 tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL);
850 if (tmp_buf == NULL) {
855 for (i = 0; (i < num_to_fill) && (rc == 0); i++) {
856 if (current_entry == NULL) {
857 /* evaluate whether this case is an error */
858 cERROR(1, "past SMB end, num to fill %d i %d",
862 /* if buggy server returns . and .. late do
863 we want to check for that here? */
864 rc = cifs_filldir(current_entry, file,
865 filldir, direntry, tmp_buf, max_len);
866 if (rc == -EOVERFLOW) {
873 cifsFile->srch_inf.index_of_last_entry) {
874 cFYI(1, "last entry in buf at pos %lld %s",
875 file->f_pos, tmp_buf);
876 cifs_save_resume_key(current_entry, cifsFile);
880 nxt_dir_entry(current_entry, end_of_smb,
881 cifsFile->srch_inf.info_level);