4 * Directory search handling
6 * Copyright (C) International Business Machines Corp., 2004, 2008
7 * Copyright (C) Red Hat, Inc., 2011
8 * Author(s): Steve French (sfrench@us.ibm.com)
10 * This library is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU Lesser General Public License as published
12 * by the Free Software Foundation; either version 2.1 of the License, or
13 * (at your option) any later version.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
18 * the GNU Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this library; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include <linux/pagemap.h>
26 #include <linux/slab.h>
27 #include <linux/stat.h>
30 #include "cifsproto.h"
31 #include "cifs_unicode.h"
32 #include "cifs_debug.h"
33 #include "cifs_fs_sb.h"
37 * To be safe - for UCS to UTF-8 with strings loaded with the rare long
38 * characters alloc more to account for such multibyte target UTF-8
41 #define UNICODE_NAME_MAX ((4 * NAME_MAX) + 2)
43 #ifdef CONFIG_CIFS_DEBUG2
44 static void dump_cifs_file_struct(struct file *file, char *label)
46 struct cifsFileInfo *cf;
49 cf = file->private_data;
51 cFYI(1, "empty cifs private file data");
54 if (cf->invalidHandle)
55 cFYI(1, "invalid handle");
56 if (cf->srch_inf.endOfSearch)
57 cFYI(1, "end of search");
58 if (cf->srch_inf.emptyDir)
63 static inline void dump_cifs_file_struct(struct file *file, char *label)
69 * Find the dentry that matches "name". If there isn't one, create one. If it's
70 * a negative dentry or the uniqueid changed, then drop it and recreate it.
72 static struct dentry *
73 cifs_readdir_lookup(struct dentry *parent, struct qstr *name,
74 struct cifs_fattr *fattr)
76 struct dentry *dentry, *alias;
78 struct super_block *sb = parent->d_inode->i_sb;
80 cFYI(1, "For %s", name->name);
82 if (parent->d_op && parent->d_op->d_hash)
83 parent->d_op->d_hash(parent, parent->d_inode, name);
85 name->hash = full_name_hash(name->name, name->len);
87 dentry = d_lookup(parent, name);
89 inode = dentry->d_inode;
90 /* update inode in place if i_ino didn't change */
91 if (inode && CIFS_I(inode)->uniqueid == fattr->cf_uniqueid) {
92 cifs_fattr_to_inode(inode, fattr);
100 * If we know that the inode will need to be revalidated immediately,
101 * then don't create a new dentry for it. We'll end up doing an on
102 * the wire call either way and this spares us an invalidation.
104 if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)
107 dentry = d_alloc(parent, name);
111 inode = cifs_iget(sb, fattr);
117 alias = d_materialise_unique(dentry, inode);
129 cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb)
131 fattr->cf_uid = cifs_sb->mnt_uid;
132 fattr->cf_gid = cifs_sb->mnt_gid;
134 if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
135 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
136 fattr->cf_dtype = DT_DIR;
138 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
139 fattr->cf_dtype = DT_REG;
142 if (fattr->cf_cifsattrs & ATTR_READONLY)
143 fattr->cf_mode &= ~S_IWUGO;
145 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL &&
146 fattr->cf_cifsattrs & ATTR_SYSTEM) {
147 if (fattr->cf_eof == 0) {
148 fattr->cf_mode &= ~S_IFMT;
149 fattr->cf_mode |= S_IFIFO;
150 fattr->cf_dtype = DT_FIFO;
153 * trying to get the type and mode via SFU can be slow,
154 * so just call those regular files for now, and mark
157 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
163 cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info,
164 struct cifs_sb_info *cifs_sb)
166 memset(fattr, 0, sizeof(*fattr));
167 fattr->cf_cifsattrs = le32_to_cpu(info->ExtFileAttributes);
168 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
169 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
170 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
171 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
172 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
173 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
175 cifs_fill_common_info(fattr, cifs_sb);
179 cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info,
180 struct cifs_sb_info *cifs_sb)
182 int offset = cifs_sb_master_tcon(cifs_sb)->ses->server->timeAdj;
184 memset(fattr, 0, sizeof(*fattr));
185 fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate,
186 info->LastAccessTime, offset);
187 fattr->cf_ctime = cnvrtDosUnixTm(info->LastWriteDate,
188 info->LastWriteTime, offset);
189 fattr->cf_mtime = cnvrtDosUnixTm(info->LastWriteDate,
190 info->LastWriteTime, offset);
192 fattr->cf_cifsattrs = le16_to_cpu(info->Attributes);
193 fattr->cf_bytes = le32_to_cpu(info->AllocationSize);
194 fattr->cf_eof = le32_to_cpu(info->DataSize);
196 cifs_fill_common_info(fattr, cifs_sb);
199 /* BB eventually need to add the following helper function to
200 resolve NT_STATUS_STOPPED_ON_SYMLINK return code when
201 we try to do FindFirst on (NTFS) directory symlinks */
203 int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
210 struct cifs_tcon *ptcon = cifs_sb_tcon(cifs_sb);
213 rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ,
214 OPEN_REPARSE_POINT, &fid, &oplock, NULL,
216 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
218 tmpbuffer = kmalloc(maxpath);
219 rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path,
224 if (CIFSSMBClose(xid, ptcon, fid)) {
225 cFYI(1, "Error closing temporary reparsepoint open");
231 static int initiate_cifs_search(const int xid, struct file *file)
235 char *full_path = NULL;
236 struct cifsFileInfo *cifsFile;
237 struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
238 struct tcon_link *tlink = NULL;
239 struct cifs_tcon *pTcon;
241 if (file->private_data == NULL) {
242 tlink = cifs_sb_tlink(cifs_sb);
244 return PTR_ERR(tlink);
246 cifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
247 if (cifsFile == NULL) {
251 file->private_data = cifsFile;
252 cifsFile->tlink = cifs_get_tlink(tlink);
253 pTcon = tlink_tcon(tlink);
255 cifsFile = file->private_data;
256 pTcon = tlink_tcon(cifsFile->tlink);
259 cifsFile->invalidHandle = true;
260 cifsFile->srch_inf.endOfSearch = false;
262 full_path = build_path_from_dentry(file->f_path.dentry);
263 if (full_path == NULL) {
268 cFYI(1, "Full path: %s start at: %lld", full_path, file->f_pos);
271 /* test for Unix extensions */
272 /* but now check for them on the share/mount not on the SMB session */
273 /* if (pTcon->ses->capabilities & CAP_UNIX) { */
275 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
276 else if ((pTcon->ses->capabilities &
277 (CAP_NT_SMBS | CAP_NT_FIND)) == 0) {
278 cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
279 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
280 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
281 } else /* not srvinos - BB fixme add check for backlevel? */ {
282 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
285 search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
286 if (backup_cred(cifs_sb))
287 search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
289 rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls,
290 &cifsFile->netfid, search_flags, &cifsFile->srch_inf,
291 cifs_sb->mnt_cifs_flags &
292 CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
294 cifsFile->invalidHandle = false;
295 /* BB add following call to handle readdir on new NTFS symlink errors
296 else if STATUS_STOPPED_ON_SYMLINK
297 call get_symlink_reparse_path and retry with new path */
298 else if ((rc == -EOPNOTSUPP) &&
299 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
300 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
305 cifs_put_tlink(tlink);
309 /* return length of unicode string in bytes */
310 static int cifs_unicode_bytelen(const char *str)
313 const __le16 *ustr = (const __le16 *)str;
315 for (len = 0; len <= PATH_MAX; len++) {
319 cFYI(1, "Unicode string longer than PATH_MAX found");
323 static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
326 FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
328 if (level == SMB_FIND_FILE_INFO_STANDARD) {
329 FIND_FILE_STANDARD_INFO *pfData;
330 pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
332 new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
333 pfData->FileNameLength;
335 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
336 cFYI(1, "new entry %p old entry %p", new_entry, old_entry);
337 /* validate that new_entry is not past end of SMB */
338 if (new_entry >= end_of_smb) {
339 cERROR(1, "search entry %p began after end of SMB %p old entry %p",
340 new_entry, end_of_smb, old_entry);
342 } else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
343 (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb))
344 || ((level != SMB_FIND_FILE_INFO_STANDARD) &&
345 (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
346 cERROR(1, "search entry %p extends after end of SMB %p",
347 new_entry, end_of_smb);
361 static void cifs_fill_dirent_unix(struct cifs_dirent *de,
362 const FILE_UNIX_INFO *info, bool is_unicode)
364 de->name = &info->FileName[0];
366 de->namelen = cifs_unicode_bytelen(de->name);
368 de->namelen = strnlen(de->name, PATH_MAX);
369 de->resume_key = info->ResumeKey;
370 de->ino = le64_to_cpu(info->basic.UniqueId);
373 static void cifs_fill_dirent_dir(struct cifs_dirent *de,
374 const FILE_DIRECTORY_INFO *info)
376 de->name = &info->FileName[0];
377 de->namelen = le32_to_cpu(info->FileNameLength);
378 de->resume_key = info->FileIndex;
381 static void cifs_fill_dirent_full(struct cifs_dirent *de,
382 const FILE_FULL_DIRECTORY_INFO *info)
384 de->name = &info->FileName[0];
385 de->namelen = le32_to_cpu(info->FileNameLength);
386 de->resume_key = info->FileIndex;
389 static void cifs_fill_dirent_search(struct cifs_dirent *de,
390 const SEARCH_ID_FULL_DIR_INFO *info)
392 de->name = &info->FileName[0];
393 de->namelen = le32_to_cpu(info->FileNameLength);
394 de->resume_key = info->FileIndex;
395 de->ino = le64_to_cpu(info->UniqueId);
398 static void cifs_fill_dirent_both(struct cifs_dirent *de,
399 const FILE_BOTH_DIRECTORY_INFO *info)
401 de->name = &info->FileName[0];
402 de->namelen = le32_to_cpu(info->FileNameLength);
403 de->resume_key = info->FileIndex;
406 static void cifs_fill_dirent_std(struct cifs_dirent *de,
407 const FIND_FILE_STANDARD_INFO *info)
409 de->name = &info->FileName[0];
410 /* one byte length, no endianess conversion */
411 de->namelen = info->FileNameLength;
412 de->resume_key = info->ResumeKey;
415 static int cifs_fill_dirent(struct cifs_dirent *de, const void *info,
416 u16 level, bool is_unicode)
418 memset(de, 0, sizeof(*de));
421 case SMB_FIND_FILE_UNIX:
422 cifs_fill_dirent_unix(de, info, is_unicode);
424 case SMB_FIND_FILE_DIRECTORY_INFO:
425 cifs_fill_dirent_dir(de, info);
427 case SMB_FIND_FILE_FULL_DIRECTORY_INFO:
428 cifs_fill_dirent_full(de, info);
430 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
431 cifs_fill_dirent_search(de, info);
433 case SMB_FIND_FILE_BOTH_DIRECTORY_INFO:
434 cifs_fill_dirent_both(de, info);
436 case SMB_FIND_FILE_INFO_STANDARD:
437 cifs_fill_dirent_std(de, info);
440 cFYI(1, "Unknown findfirst level %d", level);
447 #define UNICODE_DOT cpu_to_le16(0x2e)
449 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
450 static int cifs_entry_is_dot(struct cifs_dirent *de, bool is_unicode)
458 __le16 *ufilename = (__le16 *)de->name;
459 if (de->namelen == 2) {
461 if (ufilename[0] == UNICODE_DOT)
463 } else if (de->namelen == 4) {
465 if (ufilename[0] == UNICODE_DOT &&
466 ufilename[1] == UNICODE_DOT)
470 if (de->namelen == 1) {
471 if (de->name[0] == '.')
473 } else if (de->namelen == 2) {
474 if (de->name[0] == '.' && de->name[1] == '.')
482 /* Check if directory that we are searching has changed so we can decide
483 whether we can use the cached search results from the previous search */
484 static int is_dir_changed(struct file *file)
486 struct inode *inode = file->f_path.dentry->d_inode;
487 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
489 if (cifsInfo->time == 0)
490 return 1; /* directory was changed, perhaps due to unlink */
496 static int cifs_save_resume_key(const char *current_entry,
497 struct cifsFileInfo *file_info)
499 struct cifs_dirent de;
502 rc = cifs_fill_dirent(&de, current_entry, file_info->srch_inf.info_level,
503 file_info->srch_inf.unicode);
505 file_info->srch_inf.presume_name = de.name;
506 file_info->srch_inf.resume_name_len = de.namelen;
507 file_info->srch_inf.resume_key = de.resume_key;
512 /* find the corresponding entry in the search */
513 /* Note that the SMB server returns search entries for . and .. which
514 complicates logic here if we choose to parse for them and we do not
515 assume that they are located in the findfirst return buffer.*/
516 /* We start counting in the buffer with entry 2 and increment for every
517 entry (do not increment for . or .. entry) */
518 static int find_cifs_entry(const int xid, struct cifs_tcon *pTcon,
519 struct file *file, char **ppCurrentEntry, int *num_to_ret)
524 loff_t first_entry_in_buffer;
525 loff_t index_to_find = file->f_pos;
526 struct cifsFileInfo *cifsFile = file->private_data;
527 struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
528 /* check if index in the buffer */
530 if ((cifsFile == NULL) || (ppCurrentEntry == NULL) ||
531 (num_to_ret == NULL))
534 *ppCurrentEntry = NULL;
535 first_entry_in_buffer =
536 cifsFile->srch_inf.index_of_last_entry -
537 cifsFile->srch_inf.entries_in_buffer;
539 /* if first entry in buf is zero then is first buffer
540 in search response data which means it is likely . and ..
541 will be in this buffer, although some servers do not return
542 . and .. for the root of a drive and for those we need
543 to start two entries earlier */
545 dump_cifs_file_struct(file, "In fce ");
546 if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) &&
547 is_dir_changed(file)) ||
548 (index_to_find < first_entry_in_buffer)) {
549 /* close and restart search */
550 cFYI(1, "search backing up - close and restart search");
551 spin_lock(&cifs_file_list_lock);
552 if (!cifsFile->srch_inf.endOfSearch &&
553 !cifsFile->invalidHandle) {
554 cifsFile->invalidHandle = true;
555 spin_unlock(&cifs_file_list_lock);
556 CIFSFindClose(xid, pTcon, cifsFile->netfid);
558 spin_unlock(&cifs_file_list_lock);
559 if (cifsFile->srch_inf.ntwrk_buf_start) {
560 cFYI(1, "freeing SMB ff cache buf on search rewind");
561 if (cifsFile->srch_inf.smallBuf)
562 cifs_small_buf_release(cifsFile->srch_inf.
565 cifs_buf_release(cifsFile->srch_inf.
567 cifsFile->srch_inf.ntwrk_buf_start = NULL;
569 rc = initiate_cifs_search(xid, file);
571 cFYI(1, "error %d reinitiating a search on rewind",
575 /* FindFirst/Next set last_entry to NULL on malformed reply */
576 if (cifsFile->srch_inf.last_entry)
577 cifs_save_resume_key(cifsFile->srch_inf.last_entry,
581 search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
582 if (backup_cred(cifs_sb))
583 search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
585 while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
586 (rc == 0) && !cifsFile->srch_inf.endOfSearch) {
587 cFYI(1, "calling findnext2");
588 rc = CIFSFindNext(xid, pTcon, cifsFile->netfid, search_flags,
589 &cifsFile->srch_inf);
590 /* FindFirst/Next set last_entry to NULL on malformed reply */
591 if (cifsFile->srch_inf.last_entry)
592 cifs_save_resume_key(cifsFile->srch_inf.last_entry,
597 if (index_to_find < cifsFile->srch_inf.index_of_last_entry) {
598 /* we found the buffer that contains the entry */
599 /* scan and find it */
602 char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
603 smbCalcSize((struct smb_hdr *)
604 cifsFile->srch_inf.ntwrk_buf_start);
606 current_entry = cifsFile->srch_inf.srch_entries_start;
607 first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
608 - cifsFile->srch_inf.entries_in_buffer;
609 pos_in_buf = index_to_find - first_entry_in_buffer;
610 cFYI(1, "found entry - pos_in_buf %d", pos_in_buf);
612 for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) {
613 /* go entry by entry figuring out which is first */
614 current_entry = nxt_dir_entry(current_entry, end_of_smb,
615 cifsFile->srch_inf.info_level);
617 if ((current_entry == NULL) && (i < pos_in_buf)) {
618 /* BB fixme - check if we should flag this error */
619 cERROR(1, "reached end of buf searching for pos in buf"
620 " %d index to find %lld rc %d",
621 pos_in_buf, index_to_find, rc);
624 *ppCurrentEntry = current_entry;
626 cFYI(1, "index not in buffer - could not findnext into it");
630 if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
631 cFYI(1, "can not return entries pos_in_buf beyond last");
634 *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
639 static int cifs_filldir(char *find_entry, struct file *file, filldir_t filldir,
640 void *dirent, char *scratch_buf, unsigned int max_len)
642 struct cifsFileInfo *file_info = file->private_data;
643 struct super_block *sb = file->f_path.dentry->d_sb;
644 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
645 struct cifs_dirent de = { NULL, };
646 struct cifs_fattr fattr;
647 struct dentry *dentry;
652 rc = cifs_fill_dirent(&de, find_entry, file_info->srch_inf.info_level,
653 file_info->srch_inf.unicode);
657 if (de.namelen > max_len) {
658 cERROR(1, "bad search response length %zd past smb end",
663 /* skip . and .. since we added them first */
664 if (cifs_entry_is_dot(&de, file_info->srch_inf.unicode))
667 if (file_info->srch_inf.unicode) {
668 struct nls_table *nlt = cifs_sb->local_nls;
670 name.name = scratch_buf;
672 cifs_from_ucs2((char *)name.name, (__le16 *)de.name,
674 min(de.namelen, (size_t)max_len), nlt,
675 cifs_sb->mnt_cifs_flags &
676 CIFS_MOUNT_MAP_SPECIAL_CHR);
677 name.len -= nls_nullsize(nlt);
680 name.len = de.namelen;
683 switch (file_info->srch_inf.info_level) {
684 case SMB_FIND_FILE_UNIX:
685 cifs_unix_basic_to_fattr(&fattr,
686 &((FILE_UNIX_INFO *)find_entry)->basic,
689 case SMB_FIND_FILE_INFO_STANDARD:
690 cifs_std_info_to_fattr(&fattr,
691 (FIND_FILE_STANDARD_INFO *)find_entry,
695 cifs_dir_info_to_fattr(&fattr,
696 (FILE_DIRECTORY_INFO *)find_entry,
701 if (de.ino && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
702 fattr.cf_uniqueid = de.ino;
704 fattr.cf_uniqueid = iunique(sb, ROOT_I);
705 cifs_autodisable_serverino(cifs_sb);
708 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) &&
709 CIFSCouldBeMFSymlink(&fattr))
711 * trying to get the type and mode can be slow,
712 * so just call those regular files for now, and mark
715 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
717 ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid);
718 dentry = cifs_readdir_lookup(file->f_dentry, &name, &fattr);
720 rc = filldir(dirent, name.name, name.len, file->f_pos, ino,
728 int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
732 struct cifs_tcon *pTcon;
733 struct cifsFileInfo *cifsFile = NULL;
736 char *tmp_buf = NULL;
738 unsigned int max_len;
743 * Ensure FindFirst doesn't fail before doing filldir() for '.' and
744 * '..'. Otherwise we won't be able to notify VFS in case of failure.
746 if (file->private_data == NULL) {
747 rc = initiate_cifs_search(xid, file);
748 cFYI(1, "initiate cifs search rc %d", rc);
753 switch ((int) file->f_pos) {
755 if (filldir(direntry, ".", 1, file->f_pos,
756 file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) {
757 cERROR(1, "Filldir for current dir failed");
763 if (filldir(direntry, "..", 2, file->f_pos,
764 parent_ino(file->f_path.dentry), DT_DIR) < 0) {
765 cERROR(1, "Filldir for parent dir failed");
771 /* 1) If search is active,
772 is in current search buffer?
773 if it before then restart search
774 if after then keep searching till find it */
776 if (file->private_data == NULL) {
781 cifsFile = file->private_data;
782 if (cifsFile->srch_inf.endOfSearch) {
783 if (cifsFile->srch_inf.emptyDir) {
784 cFYI(1, "End of search, empty dir");
789 cifsFile->invalidHandle = true;
790 CIFSFindClose(xid, pTcon, cifsFile->netfid);
793 pTcon = tlink_tcon(cifsFile->tlink);
794 rc = find_cifs_entry(xid, pTcon, file,
795 ¤t_entry, &num_to_fill);
797 cFYI(1, "fce error %d", rc);
799 } else if (current_entry != NULL) {
800 cFYI(1, "entry %lld found", file->f_pos);
802 cFYI(1, "could not find entry");
805 cFYI(1, "loop through %d times filling dir for net buf %p",
806 num_to_fill, cifsFile->srch_inf.ntwrk_buf_start);
807 max_len = smbCalcSize((struct smb_hdr *)
808 cifsFile->srch_inf.ntwrk_buf_start);
809 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
811 tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL);
812 if (tmp_buf == NULL) {
817 for (i = 0; (i < num_to_fill) && (rc == 0); i++) {
818 if (current_entry == NULL) {
819 /* evaluate whether this case is an error */
820 cERROR(1, "past SMB end, num to fill %d i %d",
824 /* if buggy server returns . and .. late do
825 we want to check for that here? */
827 rc = cifs_filldir(current_entry, file,
828 filldir, direntry, tmp_buf, max_len);
829 if (rc == -EOVERFLOW) {
836 cifsFile->srch_inf.index_of_last_entry) {
837 cFYI(1, "last entry in buf at pos %lld %s",
838 file->f_pos, tmp_buf);
839 cifs_save_resume_key(current_entry, cifsFile);
843 nxt_dir_entry(current_entry, end_of_smb,
844 cifsFile->srch_inf.info_level);