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 * Attempt to preload the dcache with the results from the FIND_FIRST/NEXT
71 * Find the dentry that matches "name". If there isn't one, create one. If it's
72 * a negative dentry or the uniqueid changed, then drop it and recreate it.
75 cifs_prime_dcache(struct dentry
*parent
, struct qstr
*name
,
76 struct cifs_fattr
*fattr
)
78 struct dentry
*dentry
, *alias
;
80 struct super_block
*sb
= parent
->d_inode
->i_sb
;
81 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
83 cFYI(1, "%s: for %s", __func__
, name
->name
);
85 dentry
= d_hash_and_lookup(parent
, name
);
86 if (unlikely(IS_ERR(dentry
)))
92 inode
= dentry
->d_inode
;
95 * If we're generating inode numbers, then we don't
96 * want to clobber the existing one with the one that
97 * the readdir code created.
99 if (!(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
))
100 fattr
->cf_uniqueid
= CIFS_I(inode
)->uniqueid
;
102 /* update inode in place if i_ino didn't change */
103 if (CIFS_I(inode
)->uniqueid
== fattr
->cf_uniqueid
) {
104 cifs_fattr_to_inode(inode
, fattr
);
108 err
= d_invalidate(dentry
);
114 dentry
= d_alloc(parent
, name
);
118 inode
= cifs_iget(sb
, fattr
);
122 alias
= d_materialise_unique(dentry
, inode
);
123 if (alias
&& !IS_ERR(alias
))
130 cifs_fill_common_info(struct cifs_fattr
*fattr
, struct cifs_sb_info
*cifs_sb
)
132 fattr
->cf_uid
= cifs_sb
->mnt_uid
;
133 fattr
->cf_gid
= cifs_sb
->mnt_gid
;
135 if (fattr
->cf_cifsattrs
& ATTR_DIRECTORY
) {
136 fattr
->cf_mode
= S_IFDIR
| cifs_sb
->mnt_dir_mode
;
137 fattr
->cf_dtype
= DT_DIR
;
139 fattr
->cf_mode
= S_IFREG
| cifs_sb
->mnt_file_mode
;
140 fattr
->cf_dtype
= DT_REG
;
143 if (fattr
->cf_cifsattrs
& ATTR_READONLY
)
144 fattr
->cf_mode
&= ~S_IWUGO
;
147 * We of course don't get ACL info in FIND_FIRST/NEXT results, so
148 * mark it for revalidation so that "ls -l" will look right. It might
149 * be super-slow, but if we don't do this then the ownership of files
150 * may look wrong since the inodes may not have timed out by the time
151 * "ls" does a stat() call on them.
153 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_CIFS_ACL
)
154 fattr
->cf_flags
|= CIFS_FATTR_NEED_REVAL
;
156 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UNX_EMUL
&&
157 fattr
->cf_cifsattrs
& ATTR_SYSTEM
) {
158 if (fattr
->cf_eof
== 0) {
159 fattr
->cf_mode
&= ~S_IFMT
;
160 fattr
->cf_mode
|= S_IFIFO
;
161 fattr
->cf_dtype
= DT_FIFO
;
164 * trying to get the type and mode via SFU can be slow,
165 * so just call those regular files for now, and mark
168 fattr
->cf_flags
|= CIFS_FATTR_NEED_REVAL
;
174 cifs_dir_info_to_fattr(struct cifs_fattr
*fattr
, FILE_DIRECTORY_INFO
*info
,
175 struct cifs_sb_info
*cifs_sb
)
177 memset(fattr
, 0, sizeof(*fattr
));
178 fattr
->cf_cifsattrs
= le32_to_cpu(info
->ExtFileAttributes
);
179 fattr
->cf_eof
= le64_to_cpu(info
->EndOfFile
);
180 fattr
->cf_bytes
= le64_to_cpu(info
->AllocationSize
);
181 fattr
->cf_createtime
= le64_to_cpu(info
->CreationTime
);
182 fattr
->cf_atime
= cifs_NTtimeToUnix(info
->LastAccessTime
);
183 fattr
->cf_ctime
= cifs_NTtimeToUnix(info
->ChangeTime
);
184 fattr
->cf_mtime
= cifs_NTtimeToUnix(info
->LastWriteTime
);
186 cifs_fill_common_info(fattr
, cifs_sb
);
190 cifs_std_info_to_fattr(struct cifs_fattr
*fattr
, FIND_FILE_STANDARD_INFO
*info
,
191 struct cifs_sb_info
*cifs_sb
)
193 int offset
= cifs_sb_master_tcon(cifs_sb
)->ses
->server
->timeAdj
;
195 memset(fattr
, 0, sizeof(*fattr
));
196 fattr
->cf_atime
= cnvrtDosUnixTm(info
->LastAccessDate
,
197 info
->LastAccessTime
, offset
);
198 fattr
->cf_ctime
= cnvrtDosUnixTm(info
->LastWriteDate
,
199 info
->LastWriteTime
, offset
);
200 fattr
->cf_mtime
= cnvrtDosUnixTm(info
->LastWriteDate
,
201 info
->LastWriteTime
, offset
);
203 fattr
->cf_cifsattrs
= le16_to_cpu(info
->Attributes
);
204 fattr
->cf_bytes
= le32_to_cpu(info
->AllocationSize
);
205 fattr
->cf_eof
= le32_to_cpu(info
->DataSize
);
207 cifs_fill_common_info(fattr
, cifs_sb
);
210 /* BB eventually need to add the following helper function to
211 resolve NT_STATUS_STOPPED_ON_SYMLINK return code when
212 we try to do FindFirst on (NTFS) directory symlinks */
214 int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
221 struct cifs_tcon *ptcon = cifs_sb_tcon(cifs_sb);
224 rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ,
225 OPEN_REPARSE_POINT, &fid, &oplock, NULL,
227 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
229 tmpbuffer = kmalloc(maxpath);
230 rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path,
235 if (CIFSSMBClose(xid, ptcon, fid)) {
236 cFYI(1, "Error closing temporary reparsepoint open");
243 initiate_cifs_search(const unsigned int xid
, struct file
*file
)
247 char *full_path
= NULL
;
248 struct cifsFileInfo
*cifsFile
;
249 struct cifs_sb_info
*cifs_sb
= CIFS_SB(file
->f_path
.dentry
->d_sb
);
250 struct tcon_link
*tlink
= NULL
;
251 struct cifs_tcon
*tcon
;
252 struct TCP_Server_Info
*server
;
254 if (file
->private_data
== NULL
) {
255 tlink
= cifs_sb_tlink(cifs_sb
);
257 return PTR_ERR(tlink
);
259 cifsFile
= kzalloc(sizeof(struct cifsFileInfo
), GFP_KERNEL
);
260 if (cifsFile
== NULL
) {
264 file
->private_data
= cifsFile
;
265 cifsFile
->tlink
= cifs_get_tlink(tlink
);
266 tcon
= tlink_tcon(tlink
);
268 cifsFile
= file
->private_data
;
269 tcon
= tlink_tcon(cifsFile
->tlink
);
272 server
= tcon
->ses
->server
;
274 if (!server
->ops
->query_dir_first
) {
279 cifsFile
->invalidHandle
= true;
280 cifsFile
->srch_inf
.endOfSearch
= false;
282 full_path
= build_path_from_dentry(file
->f_path
.dentry
);
283 if (full_path
== NULL
) {
288 cFYI(1, "Full path: %s start at: %lld", full_path
, file
->f_pos
);
291 /* test for Unix extensions */
292 /* but now check for them on the share/mount not on the SMB session */
293 /* if (cap_unix(tcon->ses) { */
295 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_UNIX
;
296 else if ((tcon
->ses
->capabilities
&
297 tcon
->ses
->server
->vals
->cap_nt_find
) == 0) {
298 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_INFO_STANDARD
;
299 } else if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) {
300 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_ID_FULL_DIR_INFO
;
301 } else /* not srvinos - BB fixme add check for backlevel? */ {
302 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_DIRECTORY_INFO
;
305 search_flags
= CIFS_SEARCH_CLOSE_AT_END
| CIFS_SEARCH_RETURN_RESUME
;
306 if (backup_cred(cifs_sb
))
307 search_flags
|= CIFS_SEARCH_BACKUP_SEARCH
;
309 rc
= server
->ops
->query_dir_first(xid
, tcon
, full_path
, cifs_sb
,
310 &cifsFile
->fid
, search_flags
,
311 &cifsFile
->srch_inf
);
314 cifsFile
->invalidHandle
= false;
315 /* BB add following call to handle readdir on new NTFS symlink errors
316 else if STATUS_STOPPED_ON_SYMLINK
317 call get_symlink_reparse_path and retry with new path */
318 else if ((rc
== -EOPNOTSUPP
) &&
319 (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)) {
320 cifs_sb
->mnt_cifs_flags
&= ~CIFS_MOUNT_SERVER_INUM
;
325 cifs_put_tlink(tlink
);
329 /* return length of unicode string in bytes */
330 static int cifs_unicode_bytelen(const char *str
)
333 const __le16
*ustr
= (const __le16
*)str
;
335 for (len
= 0; len
<= PATH_MAX
; len
++) {
339 cFYI(1, "Unicode string longer than PATH_MAX found");
343 static char *nxt_dir_entry(char *old_entry
, char *end_of_smb
, int level
)
346 FILE_DIRECTORY_INFO
*pDirInfo
= (FILE_DIRECTORY_INFO
*)old_entry
;
348 if (level
== SMB_FIND_FILE_INFO_STANDARD
) {
349 FIND_FILE_STANDARD_INFO
*pfData
;
350 pfData
= (FIND_FILE_STANDARD_INFO
*)pDirInfo
;
352 new_entry
= old_entry
+ sizeof(FIND_FILE_STANDARD_INFO
) +
353 pfData
->FileNameLength
;
355 new_entry
= old_entry
+ le32_to_cpu(pDirInfo
->NextEntryOffset
);
356 cFYI(1, "new entry %p old entry %p", new_entry
, old_entry
);
357 /* validate that new_entry is not past end of SMB */
358 if (new_entry
>= end_of_smb
) {
359 cERROR(1, "search entry %p began after end of SMB %p old entry %p",
360 new_entry
, end_of_smb
, old_entry
);
362 } else if (((level
== SMB_FIND_FILE_INFO_STANDARD
) &&
363 (new_entry
+ sizeof(FIND_FILE_STANDARD_INFO
) > end_of_smb
))
364 || ((level
!= SMB_FIND_FILE_INFO_STANDARD
) &&
365 (new_entry
+ sizeof(FILE_DIRECTORY_INFO
) > end_of_smb
))) {
366 cERROR(1, "search entry %p extends after end of SMB %p",
367 new_entry
, end_of_smb
);
381 static void cifs_fill_dirent_unix(struct cifs_dirent
*de
,
382 const FILE_UNIX_INFO
*info
, bool is_unicode
)
384 de
->name
= &info
->FileName
[0];
386 de
->namelen
= cifs_unicode_bytelen(de
->name
);
388 de
->namelen
= strnlen(de
->name
, PATH_MAX
);
389 de
->resume_key
= info
->ResumeKey
;
390 de
->ino
= le64_to_cpu(info
->basic
.UniqueId
);
393 static void cifs_fill_dirent_dir(struct cifs_dirent
*de
,
394 const FILE_DIRECTORY_INFO
*info
)
396 de
->name
= &info
->FileName
[0];
397 de
->namelen
= le32_to_cpu(info
->FileNameLength
);
398 de
->resume_key
= info
->FileIndex
;
401 static void cifs_fill_dirent_full(struct cifs_dirent
*de
,
402 const FILE_FULL_DIRECTORY_INFO
*info
)
404 de
->name
= &info
->FileName
[0];
405 de
->namelen
= le32_to_cpu(info
->FileNameLength
);
406 de
->resume_key
= info
->FileIndex
;
409 static void cifs_fill_dirent_search(struct cifs_dirent
*de
,
410 const SEARCH_ID_FULL_DIR_INFO
*info
)
412 de
->name
= &info
->FileName
[0];
413 de
->namelen
= le32_to_cpu(info
->FileNameLength
);
414 de
->resume_key
= info
->FileIndex
;
415 de
->ino
= le64_to_cpu(info
->UniqueId
);
418 static void cifs_fill_dirent_both(struct cifs_dirent
*de
,
419 const FILE_BOTH_DIRECTORY_INFO
*info
)
421 de
->name
= &info
->FileName
[0];
422 de
->namelen
= le32_to_cpu(info
->FileNameLength
);
423 de
->resume_key
= info
->FileIndex
;
426 static void cifs_fill_dirent_std(struct cifs_dirent
*de
,
427 const FIND_FILE_STANDARD_INFO
*info
)
429 de
->name
= &info
->FileName
[0];
430 /* one byte length, no endianess conversion */
431 de
->namelen
= info
->FileNameLength
;
432 de
->resume_key
= info
->ResumeKey
;
435 static int cifs_fill_dirent(struct cifs_dirent
*de
, const void *info
,
436 u16 level
, bool is_unicode
)
438 memset(de
, 0, sizeof(*de
));
441 case SMB_FIND_FILE_UNIX
:
442 cifs_fill_dirent_unix(de
, info
, is_unicode
);
444 case SMB_FIND_FILE_DIRECTORY_INFO
:
445 cifs_fill_dirent_dir(de
, info
);
447 case SMB_FIND_FILE_FULL_DIRECTORY_INFO
:
448 cifs_fill_dirent_full(de
, info
);
450 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
451 cifs_fill_dirent_search(de
, info
);
453 case SMB_FIND_FILE_BOTH_DIRECTORY_INFO
:
454 cifs_fill_dirent_both(de
, info
);
456 case SMB_FIND_FILE_INFO_STANDARD
:
457 cifs_fill_dirent_std(de
, info
);
460 cFYI(1, "Unknown findfirst level %d", level
);
467 #define UNICODE_DOT cpu_to_le16(0x2e)
469 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
470 static int cifs_entry_is_dot(struct cifs_dirent
*de
, bool is_unicode
)
478 __le16
*ufilename
= (__le16
*)de
->name
;
479 if (de
->namelen
== 2) {
481 if (ufilename
[0] == UNICODE_DOT
)
483 } else if (de
->namelen
== 4) {
485 if (ufilename
[0] == UNICODE_DOT
&&
486 ufilename
[1] == UNICODE_DOT
)
490 if (de
->namelen
== 1) {
491 if (de
->name
[0] == '.')
493 } else if (de
->namelen
== 2) {
494 if (de
->name
[0] == '.' && de
->name
[1] == '.')
502 /* Check if directory that we are searching has changed so we can decide
503 whether we can use the cached search results from the previous search */
504 static int is_dir_changed(struct file
*file
)
506 struct inode
*inode
= file_inode(file
);
507 struct cifsInodeInfo
*cifsInfo
= CIFS_I(inode
);
509 if (cifsInfo
->time
== 0)
510 return 1; /* directory was changed, perhaps due to unlink */
516 static int cifs_save_resume_key(const char *current_entry
,
517 struct cifsFileInfo
*file_info
)
519 struct cifs_dirent de
;
522 rc
= cifs_fill_dirent(&de
, current_entry
, file_info
->srch_inf
.info_level
,
523 file_info
->srch_inf
.unicode
);
525 file_info
->srch_inf
.presume_name
= de
.name
;
526 file_info
->srch_inf
.resume_name_len
= de
.namelen
;
527 file_info
->srch_inf
.resume_key
= de
.resume_key
;
533 * Find the corresponding entry in the search. Note that the SMB server returns
534 * search entries for . and .. which complicates logic here if we choose to
535 * parse for them and we do not assume that they are located in the findfirst
536 * return buffer. We start counting in the buffer with entry 2 and increment for
537 * every entry (do not increment for . or .. entry).
540 find_cifs_entry(const unsigned int xid
, struct cifs_tcon
*tcon
,
541 struct file
*file
, char **current_entry
, int *num_to_ret
)
546 loff_t first_entry_in_buffer
;
547 loff_t index_to_find
= file
->f_pos
;
548 struct cifsFileInfo
*cfile
= file
->private_data
;
549 struct cifs_sb_info
*cifs_sb
= CIFS_SB(file
->f_path
.dentry
->d_sb
);
550 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
551 /* check if index in the buffer */
553 if (!server
->ops
->query_dir_first
|| !server
->ops
->query_dir_next
)
556 if ((cfile
== NULL
) || (current_entry
== NULL
) || (num_to_ret
== NULL
))
559 *current_entry
= NULL
;
560 first_entry_in_buffer
= cfile
->srch_inf
.index_of_last_entry
-
561 cfile
->srch_inf
.entries_in_buffer
;
564 * If first entry in buf is zero then is first buffer
565 * in search response data which means it is likely . and ..
566 * will be in this buffer, although some servers do not return
567 * . and .. for the root of a drive and for those we need
568 * to start two entries earlier.
571 dump_cifs_file_struct(file
, "In fce ");
572 if (((index_to_find
< cfile
->srch_inf
.index_of_last_entry
) &&
573 is_dir_changed(file
)) || (index_to_find
< first_entry_in_buffer
)) {
574 /* close and restart search */
575 cFYI(1, "search backing up - close and restart search");
576 spin_lock(&cifs_file_list_lock
);
577 if (!cfile
->srch_inf
.endOfSearch
&& !cfile
->invalidHandle
) {
578 cfile
->invalidHandle
= true;
579 spin_unlock(&cifs_file_list_lock
);
580 if (server
->ops
->close
)
581 server
->ops
->close(xid
, tcon
, &cfile
->fid
);
583 spin_unlock(&cifs_file_list_lock
);
584 if (cfile
->srch_inf
.ntwrk_buf_start
) {
585 cFYI(1, "freeing SMB ff cache buf on search rewind");
586 if (cfile
->srch_inf
.smallBuf
)
587 cifs_small_buf_release(cfile
->srch_inf
.
590 cifs_buf_release(cfile
->srch_inf
.
592 cfile
->srch_inf
.ntwrk_buf_start
= NULL
;
594 rc
= initiate_cifs_search(xid
, file
);
596 cFYI(1, "error %d reinitiating a search on rewind",
600 /* FindFirst/Next set last_entry to NULL on malformed reply */
601 if (cfile
->srch_inf
.last_entry
)
602 cifs_save_resume_key(cfile
->srch_inf
.last_entry
, cfile
);
605 search_flags
= CIFS_SEARCH_CLOSE_AT_END
| CIFS_SEARCH_RETURN_RESUME
;
606 if (backup_cred(cifs_sb
))
607 search_flags
|= CIFS_SEARCH_BACKUP_SEARCH
;
609 while ((index_to_find
>= cfile
->srch_inf
.index_of_last_entry
) &&
610 (rc
== 0) && !cfile
->srch_inf
.endOfSearch
) {
611 cFYI(1, "calling findnext2");
612 rc
= server
->ops
->query_dir_next(xid
, tcon
, &cfile
->fid
,
615 /* FindFirst/Next set last_entry to NULL on malformed reply */
616 if (cfile
->srch_inf
.last_entry
)
617 cifs_save_resume_key(cfile
->srch_inf
.last_entry
, cfile
);
621 if (index_to_find
< cfile
->srch_inf
.index_of_last_entry
) {
622 /* we found the buffer that contains the entry */
623 /* scan and find it */
626 char *end_of_smb
= cfile
->srch_inf
.ntwrk_buf_start
+
627 server
->ops
->calc_smb_size(
628 cfile
->srch_inf
.ntwrk_buf_start
);
630 cur_ent
= cfile
->srch_inf
.srch_entries_start
;
631 first_entry_in_buffer
= cfile
->srch_inf
.index_of_last_entry
632 - cfile
->srch_inf
.entries_in_buffer
;
633 pos_in_buf
= index_to_find
- first_entry_in_buffer
;
634 cFYI(1, "found entry - pos_in_buf %d", pos_in_buf
);
636 for (i
= 0; (i
< (pos_in_buf
)) && (cur_ent
!= NULL
); i
++) {
637 /* go entry by entry figuring out which is first */
638 cur_ent
= nxt_dir_entry(cur_ent
, end_of_smb
,
639 cfile
->srch_inf
.info_level
);
641 if ((cur_ent
== NULL
) && (i
< pos_in_buf
)) {
642 /* BB fixme - check if we should flag this error */
643 cERROR(1, "reached end of buf searching for pos in buf"
644 " %d index to find %lld rc %d", pos_in_buf
,
648 *current_entry
= cur_ent
;
650 cFYI(1, "index not in buffer - could not findnext into it");
654 if (pos_in_buf
>= cfile
->srch_inf
.entries_in_buffer
) {
655 cFYI(1, "can not return entries pos_in_buf beyond last");
658 *num_to_ret
= cfile
->srch_inf
.entries_in_buffer
- pos_in_buf
;
663 static int cifs_filldir(char *find_entry
, struct file
*file
, filldir_t filldir
,
664 void *dirent
, char *scratch_buf
, unsigned int max_len
)
666 struct cifsFileInfo
*file_info
= file
->private_data
;
667 struct super_block
*sb
= file
->f_path
.dentry
->d_sb
;
668 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
669 struct cifs_dirent de
= { NULL
, };
670 struct cifs_fattr fattr
;
675 rc
= cifs_fill_dirent(&de
, find_entry
, file_info
->srch_inf
.info_level
,
676 file_info
->srch_inf
.unicode
);
680 if (de
.namelen
> max_len
) {
681 cERROR(1, "bad search response length %zd past smb end",
686 /* skip . and .. since we added them first */
687 if (cifs_entry_is_dot(&de
, file_info
->srch_inf
.unicode
))
690 if (file_info
->srch_inf
.unicode
) {
691 struct nls_table
*nlt
= cifs_sb
->local_nls
;
693 name
.name
= scratch_buf
;
695 cifs_from_utf16((char *)name
.name
, (__le16
*)de
.name
,
697 min_t(size_t, de
.namelen
,
698 (size_t)max_len
), nlt
,
699 cifs_sb
->mnt_cifs_flags
&
700 CIFS_MOUNT_MAP_SPECIAL_CHR
);
701 name
.len
-= nls_nullsize(nlt
);
704 name
.len
= de
.namelen
;
707 switch (file_info
->srch_inf
.info_level
) {
708 case SMB_FIND_FILE_UNIX
:
709 cifs_unix_basic_to_fattr(&fattr
,
710 &((FILE_UNIX_INFO
*)find_entry
)->basic
,
713 case SMB_FIND_FILE_INFO_STANDARD
:
714 cifs_std_info_to_fattr(&fattr
,
715 (FIND_FILE_STANDARD_INFO
*)find_entry
,
719 cifs_dir_info_to_fattr(&fattr
,
720 (FILE_DIRECTORY_INFO
*)find_entry
,
725 if (de
.ino
&& (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)) {
726 fattr
.cf_uniqueid
= de
.ino
;
728 fattr
.cf_uniqueid
= iunique(sb
, ROOT_I
);
729 cifs_autodisable_serverino(cifs_sb
);
732 if ((cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MF_SYMLINKS
) &&
733 CIFSCouldBeMFSymlink(&fattr
))
735 * trying to get the type and mode can be slow,
736 * so just call those regular files for now, and mark
739 fattr
.cf_flags
|= CIFS_FATTR_NEED_REVAL
;
741 cifs_prime_dcache(file
->f_dentry
, &name
, &fattr
);
743 ino
= cifs_uniqueid_to_ino_t(fattr
.cf_uniqueid
);
744 rc
= filldir(dirent
, name
.name
, name
.len
, file
->f_pos
, ino
,
750 int cifs_readdir(struct file
*file
, void *direntry
, filldir_t filldir
)
755 struct cifs_tcon
*tcon
;
756 struct cifsFileInfo
*cifsFile
= NULL
;
759 char *tmp_buf
= NULL
;
761 unsigned int max_len
;
766 * Ensure FindFirst doesn't fail before doing filldir() for '.' and
767 * '..'. Otherwise we won't be able to notify VFS in case of failure.
769 if (file
->private_data
== NULL
) {
770 rc
= initiate_cifs_search(xid
, file
);
771 cFYI(1, "initiate cifs search rc %d", rc
);
776 switch ((int) file
->f_pos
) {
778 if (filldir(direntry
, ".", 1, file
->f_pos
,
779 file_inode(file
)->i_ino
, DT_DIR
) < 0) {
780 cERROR(1, "Filldir for current dir failed");
786 if (filldir(direntry
, "..", 2, file
->f_pos
,
787 parent_ino(file
->f_path
.dentry
), DT_DIR
) < 0) {
788 cERROR(1, "Filldir for parent dir failed");
794 /* 1) If search is active,
795 is in current search buffer?
796 if it before then restart search
797 if after then keep searching till find it */
799 if (file
->private_data
== NULL
) {
804 cifsFile
= file
->private_data
;
805 if (cifsFile
->srch_inf
.endOfSearch
) {
806 if (cifsFile
->srch_inf
.emptyDir
) {
807 cFYI(1, "End of search, empty dir");
812 cifsFile->invalidHandle = true;
813 tcon->ses->server->close(xid, tcon, &cifsFile->fid);
816 tcon
= tlink_tcon(cifsFile
->tlink
);
817 rc
= find_cifs_entry(xid
, tcon
, file
, ¤t_entry
,
820 cFYI(1, "fce error %d", rc
);
822 } else if (current_entry
!= NULL
) {
823 cFYI(1, "entry %lld found", file
->f_pos
);
825 cFYI(1, "could not find entry");
828 cFYI(1, "loop through %d times filling dir for net buf %p",
829 num_to_fill
, cifsFile
->srch_inf
.ntwrk_buf_start
);
830 max_len
= tcon
->ses
->server
->ops
->calc_smb_size(
831 cifsFile
->srch_inf
.ntwrk_buf_start
);
832 end_of_smb
= cifsFile
->srch_inf
.ntwrk_buf_start
+ max_len
;
834 tmp_buf
= kmalloc(UNICODE_NAME_MAX
, GFP_KERNEL
);
835 if (tmp_buf
== NULL
) {
840 for (i
= 0; (i
< num_to_fill
) && (rc
== 0); i
++) {
841 if (current_entry
== NULL
) {
842 /* evaluate whether this case is an error */
843 cERROR(1, "past SMB end, num to fill %d i %d",
848 * if buggy server returns . and .. late do we want to
849 * check for that here?
851 rc
= cifs_filldir(current_entry
, file
, filldir
,
852 direntry
, tmp_buf
, max_len
);
853 if (rc
== -EOVERFLOW
) {
860 cifsFile
->srch_inf
.index_of_last_entry
) {
861 cFYI(1, "last entry in buf at pos %lld %s",
862 file
->f_pos
, tmp_buf
);
863 cifs_save_resume_key(current_entry
, cifsFile
);
867 nxt_dir_entry(current_entry
, end_of_smb
,
868 cifsFile
->srch_inf
.info_level
);