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 /* FIXME: check for inode number changes? */
90 if (dentry->d_inode != NULL)
96 dentry = d_alloc(parent, name);
100 inode = cifs_iget(sb, fattr);
106 alias = d_materialise_unique(dentry, inode);
118 cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb)
120 fattr->cf_uid = cifs_sb->mnt_uid;
121 fattr->cf_gid = cifs_sb->mnt_gid;
123 if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
124 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
125 fattr->cf_dtype = DT_DIR;
127 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
128 fattr->cf_dtype = DT_REG;
131 if (fattr->cf_cifsattrs & ATTR_READONLY)
132 fattr->cf_mode &= ~S_IWUGO;
134 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL &&
135 fattr->cf_cifsattrs & ATTR_SYSTEM) {
136 if (fattr->cf_eof == 0) {
137 fattr->cf_mode &= ~S_IFMT;
138 fattr->cf_mode |= S_IFIFO;
139 fattr->cf_dtype = DT_FIFO;
142 * trying to get the type and mode via SFU can be slow,
143 * so just call those regular files for now, and mark
146 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
152 cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info,
153 struct cifs_sb_info *cifs_sb)
155 memset(fattr, 0, sizeof(*fattr));
156 fattr->cf_cifsattrs = le32_to_cpu(info->ExtFileAttributes);
157 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
158 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
159 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
160 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
161 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
162 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
164 cifs_fill_common_info(fattr, cifs_sb);
168 cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info,
169 struct cifs_sb_info *cifs_sb)
171 int offset = cifs_sb_master_tcon(cifs_sb)->ses->server->timeAdj;
173 memset(fattr, 0, sizeof(*fattr));
174 fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate,
175 info->LastAccessTime, offset);
176 fattr->cf_ctime = cnvrtDosUnixTm(info->LastWriteDate,
177 info->LastWriteTime, offset);
178 fattr->cf_mtime = cnvrtDosUnixTm(info->LastWriteDate,
179 info->LastWriteTime, offset);
181 fattr->cf_cifsattrs = le16_to_cpu(info->Attributes);
182 fattr->cf_bytes = le32_to_cpu(info->AllocationSize);
183 fattr->cf_eof = le32_to_cpu(info->DataSize);
185 cifs_fill_common_info(fattr, cifs_sb);
188 /* BB eventually need to add the following helper function to
189 resolve NT_STATUS_STOPPED_ON_SYMLINK return code when
190 we try to do FindFirst on (NTFS) directory symlinks */
192 int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
199 struct cifs_tcon *ptcon = cifs_sb_tcon(cifs_sb);
202 rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ,
203 OPEN_REPARSE_POINT, &fid, &oplock, NULL,
205 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
207 tmpbuffer = kmalloc(maxpath);
208 rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path,
213 if (CIFSSMBClose(xid, ptcon, fid)) {
214 cFYI(1, "Error closing temporary reparsepoint open");
220 static int initiate_cifs_search(const int xid, struct file *file)
223 char *full_path = NULL;
224 struct cifsFileInfo *cifsFile;
225 struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
226 struct tcon_link *tlink = NULL;
227 struct cifs_tcon *pTcon;
229 if (file->private_data == NULL) {
230 tlink = cifs_sb_tlink(cifs_sb);
232 return PTR_ERR(tlink);
234 cifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
235 if (cifsFile == NULL) {
239 file->private_data = cifsFile;
240 cifsFile->tlink = cifs_get_tlink(tlink);
241 pTcon = tlink_tcon(tlink);
243 cifsFile = file->private_data;
244 pTcon = tlink_tcon(cifsFile->tlink);
247 cifsFile->invalidHandle = true;
248 cifsFile->srch_inf.endOfSearch = false;
250 full_path = build_path_from_dentry(file->f_path.dentry);
251 if (full_path == NULL) {
256 cFYI(1, "Full path: %s start at: %lld", full_path, file->f_pos);
259 /* test for Unix extensions */
260 /* but now check for them on the share/mount not on the SMB session */
261 /* if (pTcon->ses->capabilities & CAP_UNIX) { */
263 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
264 else if ((pTcon->ses->capabilities &
265 (CAP_NT_SMBS | CAP_NT_FIND)) == 0) {
266 cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
267 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
268 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
269 } else /* not srvinos - BB fixme add check for backlevel? */ {
270 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
273 rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls,
274 &cifsFile->netfid, &cifsFile->srch_inf,
275 cifs_sb->mnt_cifs_flags &
276 CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
278 cifsFile->invalidHandle = false;
279 /* BB add following call to handle readdir on new NTFS symlink errors
280 else if STATUS_STOPPED_ON_SYMLINK
281 call get_symlink_reparse_path and retry with new path */
282 else if ((rc == -EOPNOTSUPP) &&
283 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
284 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
289 cifs_put_tlink(tlink);
293 /* return length of unicode string in bytes */
294 static int cifs_unicode_bytelen(const char *str)
297 const __le16 *ustr = (const __le16 *)str;
299 for (len = 0; len <= PATH_MAX; len++) {
303 cFYI(1, "Unicode string longer than PATH_MAX found");
307 static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
310 FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
312 if (level == SMB_FIND_FILE_INFO_STANDARD) {
313 FIND_FILE_STANDARD_INFO *pfData;
314 pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
316 new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
317 pfData->FileNameLength;
319 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
320 cFYI(1, "new entry %p old entry %p", new_entry, old_entry);
321 /* validate that new_entry is not past end of SMB */
322 if (new_entry >= end_of_smb) {
323 cERROR(1, "search entry %p began after end of SMB %p old entry %p",
324 new_entry, end_of_smb, old_entry);
326 } else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
327 (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb))
328 || ((level != SMB_FIND_FILE_INFO_STANDARD) &&
329 (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
330 cERROR(1, "search entry %p extends after end of SMB %p",
331 new_entry, end_of_smb);
345 static void cifs_fill_dirent_unix(struct cifs_dirent *de,
346 const FILE_UNIX_INFO *info, bool is_unicode)
348 de->name = &info->FileName[0];
350 de->namelen = cifs_unicode_bytelen(de->name);
352 de->namelen = strnlen(de->name, PATH_MAX);
353 de->resume_key = info->ResumeKey;
354 de->ino = le64_to_cpu(info->basic.UniqueId);
357 static void cifs_fill_dirent_dir(struct cifs_dirent *de,
358 const FILE_DIRECTORY_INFO *info)
360 de->name = &info->FileName[0];
361 de->namelen = le32_to_cpu(info->FileNameLength);
362 de->resume_key = info->FileIndex;
365 static void cifs_fill_dirent_full(struct cifs_dirent *de,
366 const FILE_FULL_DIRECTORY_INFO *info)
368 de->name = &info->FileName[0];
369 de->namelen = le32_to_cpu(info->FileNameLength);
370 de->resume_key = info->FileIndex;
373 static void cifs_fill_dirent_search(struct cifs_dirent *de,
374 const SEARCH_ID_FULL_DIR_INFO *info)
376 de->name = &info->FileName[0];
377 de->namelen = le32_to_cpu(info->FileNameLength);
378 de->resume_key = info->FileIndex;
379 de->ino = le64_to_cpu(info->UniqueId);
382 static void cifs_fill_dirent_both(struct cifs_dirent *de,
383 const FILE_BOTH_DIRECTORY_INFO *info)
385 de->name = &info->FileName[0];
386 de->namelen = le32_to_cpu(info->FileNameLength);
387 de->resume_key = info->FileIndex;
390 static void cifs_fill_dirent_std(struct cifs_dirent *de,
391 const FIND_FILE_STANDARD_INFO *info)
393 de->name = &info->FileName[0];
394 /* one byte length, no endianess conversion */
395 de->namelen = info->FileNameLength;
396 de->resume_key = info->ResumeKey;
399 static int cifs_fill_dirent(struct cifs_dirent *de, const void *info,
400 u16 level, bool is_unicode)
402 memset(de, 0, sizeof(*de));
405 case SMB_FIND_FILE_UNIX:
406 cifs_fill_dirent_unix(de, info, is_unicode);
408 case SMB_FIND_FILE_DIRECTORY_INFO:
409 cifs_fill_dirent_dir(de, info);
411 case SMB_FIND_FILE_FULL_DIRECTORY_INFO:
412 cifs_fill_dirent_full(de, info);
414 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
415 cifs_fill_dirent_search(de, info);
417 case SMB_FIND_FILE_BOTH_DIRECTORY_INFO:
418 cifs_fill_dirent_both(de, info);
420 case SMB_FIND_FILE_INFO_STANDARD:
421 cifs_fill_dirent_std(de, info);
424 cFYI(1, "Unknown findfirst level %d", level);
431 #define UNICODE_DOT cpu_to_le16(0x2e)
433 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
434 static int cifs_entry_is_dot(struct cifs_dirent *de, bool is_unicode)
442 __le16 *ufilename = (__le16 *)de->name;
443 if (de->namelen == 2) {
445 if (ufilename[0] == UNICODE_DOT)
447 } else if (de->namelen == 4) {
449 if (ufilename[0] == UNICODE_DOT &&
450 ufilename[1] == UNICODE_DOT)
454 if (de->namelen == 1) {
455 if (de->name[0] == '.')
457 } else if (de->namelen == 2) {
458 if (de->name[0] == '.' && de->name[1] == '.')
466 /* Check if directory that we are searching has changed so we can decide
467 whether we can use the cached search results from the previous search */
468 static int is_dir_changed(struct file *file)
470 struct inode *inode = file->f_path.dentry->d_inode;
471 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
473 if (cifsInfo->time == 0)
474 return 1; /* directory was changed, perhaps due to unlink */
480 static int cifs_save_resume_key(const char *current_entry,
481 struct cifsFileInfo *cifsFile)
484 unsigned int len = 0;
488 if ((cifsFile == NULL) || (current_entry == NULL))
491 level = cifsFile->srch_inf.info_level;
493 if (level == SMB_FIND_FILE_UNIX) {
494 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
496 filename = &pFindData->FileName[0];
497 if (cifsFile->srch_inf.unicode) {
498 len = cifs_unicode_bytelen(filename);
500 /* BB should we make this strnlen of PATH_MAX? */
501 len = strnlen(filename, PATH_MAX);
503 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
504 } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {
505 FILE_DIRECTORY_INFO *pFindData =
506 (FILE_DIRECTORY_INFO *)current_entry;
507 filename = &pFindData->FileName[0];
508 len = le32_to_cpu(pFindData->FileNameLength);
509 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
510 } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
511 FILE_FULL_DIRECTORY_INFO *pFindData =
512 (FILE_FULL_DIRECTORY_INFO *)current_entry;
513 filename = &pFindData->FileName[0];
514 len = le32_to_cpu(pFindData->FileNameLength);
515 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
516 } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
517 SEARCH_ID_FULL_DIR_INFO *pFindData =
518 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
519 filename = &pFindData->FileName[0];
520 len = le32_to_cpu(pFindData->FileNameLength);
521 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
522 } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
523 FILE_BOTH_DIRECTORY_INFO *pFindData =
524 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
525 filename = &pFindData->FileName[0];
526 len = le32_to_cpu(pFindData->FileNameLength);
527 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
528 } else if (level == SMB_FIND_FILE_INFO_STANDARD) {
529 FIND_FILE_STANDARD_INFO *pFindData =
530 (FIND_FILE_STANDARD_INFO *)current_entry;
531 filename = &pFindData->FileName[0];
532 /* one byte length, no name conversion */
533 len = (unsigned int)pFindData->FileNameLength;
534 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
536 cFYI(1, "Unknown findfirst level %d", level);
539 cifsFile->srch_inf.resume_name_len = len;
540 cifsFile->srch_inf.presume_name = filename;
544 /* find the corresponding entry in the search */
545 /* Note that the SMB server returns search entries for . and .. which
546 complicates logic here if we choose to parse for them and we do not
547 assume that they are located in the findfirst return buffer.*/
548 /* We start counting in the buffer with entry 2 and increment for every
549 entry (do not increment for . or .. entry) */
550 static int find_cifs_entry(const int xid, struct cifs_tcon *pTcon,
551 struct file *file, char **ppCurrentEntry, int *num_to_ret)
555 loff_t first_entry_in_buffer;
556 loff_t index_to_find = file->f_pos;
557 struct cifsFileInfo *cifsFile = file->private_data;
558 /* check if index in the buffer */
560 if ((cifsFile == NULL) || (ppCurrentEntry == NULL) ||
561 (num_to_ret == NULL))
564 *ppCurrentEntry = NULL;
565 first_entry_in_buffer =
566 cifsFile->srch_inf.index_of_last_entry -
567 cifsFile->srch_inf.entries_in_buffer;
569 /* if first entry in buf is zero then is first buffer
570 in search response data which means it is likely . and ..
571 will be in this buffer, although some servers do not return
572 . and .. for the root of a drive and for those we need
573 to start two entries earlier */
575 dump_cifs_file_struct(file, "In fce ");
576 if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) &&
577 is_dir_changed(file)) ||
578 (index_to_find < first_entry_in_buffer)) {
579 /* close and restart search */
580 cFYI(1, "search backing up - close and restart search");
581 spin_lock(&cifs_file_list_lock);
582 if (!cifsFile->srch_inf.endOfSearch &&
583 !cifsFile->invalidHandle) {
584 cifsFile->invalidHandle = true;
585 spin_unlock(&cifs_file_list_lock);
586 CIFSFindClose(xid, pTcon, cifsFile->netfid);
588 spin_unlock(&cifs_file_list_lock);
589 if (cifsFile->srch_inf.ntwrk_buf_start) {
590 cFYI(1, "freeing SMB ff cache buf on search rewind");
591 if (cifsFile->srch_inf.smallBuf)
592 cifs_small_buf_release(cifsFile->srch_inf.
595 cifs_buf_release(cifsFile->srch_inf.
597 cifsFile->srch_inf.ntwrk_buf_start = NULL;
599 rc = initiate_cifs_search(xid, file);
601 cFYI(1, "error %d reinitiating a search on rewind",
605 cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
608 while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
609 (rc == 0) && !cifsFile->srch_inf.endOfSearch) {
610 cFYI(1, "calling findnext2");
611 rc = CIFSFindNext(xid, pTcon, cifsFile->netfid,
612 &cifsFile->srch_inf);
613 cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
617 if (index_to_find < cifsFile->srch_inf.index_of_last_entry) {
618 /* we found the buffer that contains the entry */
619 /* scan and find it */
622 char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
623 smbCalcSize((struct smb_hdr *)
624 cifsFile->srch_inf.ntwrk_buf_start);
626 current_entry = cifsFile->srch_inf.srch_entries_start;
627 first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
628 - cifsFile->srch_inf.entries_in_buffer;
629 pos_in_buf = index_to_find - first_entry_in_buffer;
630 cFYI(1, "found entry - pos_in_buf %d", pos_in_buf);
632 for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) {
633 /* go entry by entry figuring out which is first */
634 current_entry = nxt_dir_entry(current_entry, end_of_smb,
635 cifsFile->srch_inf.info_level);
637 if ((current_entry == NULL) && (i < pos_in_buf)) {
638 /* BB fixme - check if we should flag this error */
639 cERROR(1, "reached end of buf searching for pos in buf"
640 " %d index to find %lld rc %d",
641 pos_in_buf, index_to_find, rc);
644 *ppCurrentEntry = current_entry;
646 cFYI(1, "index not in buffer - could not findnext into it");
650 if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
651 cFYI(1, "can not return entries pos_in_buf beyond last");
654 *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
659 static int cifs_filldir(char *find_entry, struct file *file, filldir_t filldir,
660 void *dirent, char *scratch_buf, unsigned int max_len)
662 struct cifsFileInfo *file_info = file->private_data;
663 struct super_block *sb = file->f_path.dentry->d_sb;
664 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
665 struct cifs_dirent de = { NULL, };
666 struct cifs_fattr fattr;
667 struct dentry *dentry;
672 rc = cifs_fill_dirent(&de, find_entry, file_info->srch_inf.info_level,
673 file_info->srch_inf.unicode);
677 if (de.namelen > max_len) {
678 cERROR(1, "bad search response length %zd past smb end",
683 /* skip . and .. since we added them first */
684 if (cifs_entry_is_dot(&de, file_info->srch_inf.unicode))
687 if (file_info->srch_inf.unicode) {
688 struct nls_table *nlt = cifs_sb->local_nls;
690 name.name = scratch_buf;
692 cifs_from_ucs2((char *)name.name, (__le16 *)de.name,
694 min(de.namelen, (size_t)max_len), nlt,
695 cifs_sb->mnt_cifs_flags &
696 CIFS_MOUNT_MAP_SPECIAL_CHR);
697 name.len -= nls_nullsize(nlt);
700 name.len = de.namelen;
703 switch (file_info->srch_inf.info_level) {
704 case SMB_FIND_FILE_UNIX:
705 cifs_unix_basic_to_fattr(&fattr,
706 &((FILE_UNIX_INFO *)find_entry)->basic,
709 case SMB_FIND_FILE_INFO_STANDARD:
710 cifs_std_info_to_fattr(&fattr,
711 (FIND_FILE_STANDARD_INFO *)find_entry,
715 cifs_dir_info_to_fattr(&fattr,
716 (FILE_DIRECTORY_INFO *)find_entry,
721 if (de.ino && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
722 fattr.cf_uniqueid = de.ino;
724 fattr.cf_uniqueid = iunique(sb, ROOT_I);
725 cifs_autodisable_serverino(cifs_sb);
728 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) &&
729 CIFSCouldBeMFSymlink(&fattr))
731 * trying to get the type and mode can be slow,
732 * so just call those regular files for now, and mark
735 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
737 ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid);
738 dentry = cifs_readdir_lookup(file->f_dentry, &name, &fattr);
740 rc = filldir(dirent, name.name, name.len, file->f_pos, ino,
748 int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
752 struct cifs_tcon *pTcon;
753 struct cifsFileInfo *cifsFile = NULL;
756 char *tmp_buf = NULL;
758 unsigned int max_len;
763 * Ensure FindFirst doesn't fail before doing filldir() for '.' and
764 * '..'. Otherwise we won't be able to notify VFS in case of failure.
766 if (file->private_data == NULL) {
767 rc = initiate_cifs_search(xid, file);
768 cFYI(1, "initiate cifs search rc %d", rc);
773 switch ((int) file->f_pos) {
775 if (filldir(direntry, ".", 1, file->f_pos,
776 file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) {
777 cERROR(1, "Filldir for current dir failed");
783 if (filldir(direntry, "..", 2, file->f_pos,
784 file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
785 cERROR(1, "Filldir for parent dir failed");
791 /* 1) If search is active,
792 is in current search buffer?
793 if it before then restart search
794 if after then keep searching till find it */
796 if (file->private_data == NULL) {
801 cifsFile = file->private_data;
802 if (cifsFile->srch_inf.endOfSearch) {
803 if (cifsFile->srch_inf.emptyDir) {
804 cFYI(1, "End of search, empty dir");
809 cifsFile->invalidHandle = true;
810 CIFSFindClose(xid, pTcon, cifsFile->netfid);
813 pTcon = tlink_tcon(cifsFile->tlink);
814 rc = find_cifs_entry(xid, pTcon, file,
815 ¤t_entry, &num_to_fill);
817 cFYI(1, "fce error %d", rc);
819 } else if (current_entry != NULL) {
820 cFYI(1, "entry %lld found", file->f_pos);
822 cFYI(1, "could not find entry");
825 cFYI(1, "loop through %d times filling dir for net buf %p",
826 num_to_fill, cifsFile->srch_inf.ntwrk_buf_start);
827 max_len = smbCalcSize((struct smb_hdr *)
828 cifsFile->srch_inf.ntwrk_buf_start);
829 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
831 tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL);
832 if (tmp_buf == NULL) {
837 for (i = 0; (i < num_to_fill) && (rc == 0); i++) {
838 if (current_entry == NULL) {
839 /* evaluate whether this case is an error */
840 cERROR(1, "past SMB end, num to fill %d i %d",
844 /* if buggy server returns . and .. late do
845 we want to check for that here? */
846 rc = cifs_filldir(current_entry, file,
847 filldir, direntry, tmp_buf, max_len);
848 if (rc == -EOVERFLOW) {
855 cifsFile->srch_inf.index_of_last_entry) {
856 cFYI(1, "last entry in buf at pos %lld %s",
857 file->f_pos, tmp_buf);
858 cifs_save_resume_key(current_entry, cifsFile);
862 nxt_dir_entry(current_entry, end_of_smb,
863 cifsFile->srch_inf.info_level);