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 cifs_dbg(FYI
, "empty cifs private file data\n");
54 if (cf
->invalidHandle
)
55 cifs_dbg(FYI
, "invalid handle\n");
56 if (cf
->srch_inf
.endOfSearch
)
57 cifs_dbg(FYI
, "end of search\n");
58 if (cf
->srch_inf
.emptyDir
)
59 cifs_dbg(FYI
, "empty dir\n");
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 cifs_dbg(FYI
, "%s: for %s\n", __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
);
115 * If we know that the inode will need to be revalidated immediately,
116 * then don't create a new dentry for it. We'll end up doing an on
117 * the wire call either way and this spares us an invalidation.
119 if (fattr
->cf_flags
& CIFS_FATTR_NEED_REVAL
)
122 dentry
= d_alloc(parent
, name
);
126 inode
= cifs_iget(sb
, fattr
);
130 alias
= d_materialise_unique(dentry
, inode
);
131 if (alias
&& !IS_ERR(alias
))
138 cifs_fill_common_info(struct cifs_fattr
*fattr
, struct cifs_sb_info
*cifs_sb
)
140 fattr
->cf_uid
= cifs_sb
->mnt_uid
;
141 fattr
->cf_gid
= cifs_sb
->mnt_gid
;
143 if (fattr
->cf_cifsattrs
& ATTR_DIRECTORY
) {
144 fattr
->cf_mode
= S_IFDIR
| cifs_sb
->mnt_dir_mode
;
145 fattr
->cf_dtype
= DT_DIR
;
147 fattr
->cf_mode
= S_IFREG
| cifs_sb
->mnt_file_mode
;
148 fattr
->cf_dtype
= DT_REG
;
151 if (fattr
->cf_cifsattrs
& ATTR_READONLY
)
152 fattr
->cf_mode
&= ~S_IWUGO
;
155 * We of course don't get ACL info in FIND_FIRST/NEXT results, so
156 * mark it for revalidation so that "ls -l" will look right. It might
157 * be super-slow, but if we don't do this then the ownership of files
158 * may look wrong since the inodes may not have timed out by the time
159 * "ls" does a stat() call on them.
161 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_CIFS_ACL
)
162 fattr
->cf_flags
|= CIFS_FATTR_NEED_REVAL
;
164 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UNX_EMUL
&&
165 fattr
->cf_cifsattrs
& ATTR_SYSTEM
) {
166 if (fattr
->cf_eof
== 0) {
167 fattr
->cf_mode
&= ~S_IFMT
;
168 fattr
->cf_mode
|= S_IFIFO
;
169 fattr
->cf_dtype
= DT_FIFO
;
172 * trying to get the type and mode via SFU can be slow,
173 * so just call those regular files for now, and mark
176 fattr
->cf_flags
|= CIFS_FATTR_NEED_REVAL
;
182 cifs_dir_info_to_fattr(struct cifs_fattr
*fattr
, FILE_DIRECTORY_INFO
*info
,
183 struct cifs_sb_info
*cifs_sb
)
185 memset(fattr
, 0, sizeof(*fattr
));
186 fattr
->cf_cifsattrs
= le32_to_cpu(info
->ExtFileAttributes
);
187 fattr
->cf_eof
= le64_to_cpu(info
->EndOfFile
);
188 fattr
->cf_bytes
= le64_to_cpu(info
->AllocationSize
);
189 fattr
->cf_createtime
= le64_to_cpu(info
->CreationTime
);
190 fattr
->cf_atime
= cifs_NTtimeToUnix(info
->LastAccessTime
);
191 fattr
->cf_ctime
= cifs_NTtimeToUnix(info
->ChangeTime
);
192 fattr
->cf_mtime
= cifs_NTtimeToUnix(info
->LastWriteTime
);
194 cifs_fill_common_info(fattr
, cifs_sb
);
198 cifs_std_info_to_fattr(struct cifs_fattr
*fattr
, FIND_FILE_STANDARD_INFO
*info
,
199 struct cifs_sb_info
*cifs_sb
)
201 int offset
= cifs_sb_master_tcon(cifs_sb
)->ses
->server
->timeAdj
;
203 memset(fattr
, 0, sizeof(*fattr
));
204 fattr
->cf_atime
= cnvrtDosUnixTm(info
->LastAccessDate
,
205 info
->LastAccessTime
, offset
);
206 fattr
->cf_ctime
= cnvrtDosUnixTm(info
->LastWriteDate
,
207 info
->LastWriteTime
, offset
);
208 fattr
->cf_mtime
= cnvrtDosUnixTm(info
->LastWriteDate
,
209 info
->LastWriteTime
, offset
);
211 fattr
->cf_cifsattrs
= le16_to_cpu(info
->Attributes
);
212 fattr
->cf_bytes
= le32_to_cpu(info
->AllocationSize
);
213 fattr
->cf_eof
= le32_to_cpu(info
->DataSize
);
215 cifs_fill_common_info(fattr
, cifs_sb
);
218 /* BB eventually need to add the following helper function to
219 resolve NT_STATUS_STOPPED_ON_SYMLINK return code when
220 we try to do FindFirst on (NTFS) directory symlinks */
222 int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
229 struct cifs_tcon *ptcon = cifs_sb_tcon(cifs_sb);
232 rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ,
233 OPEN_REPARSE_POINT, &fid, &oplock, NULL,
235 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
237 tmpbuffer = kmalloc(maxpath);
238 rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path,
243 if (CIFSSMBClose(xid, ptcon, fid)) {
244 cifs_dbg(FYI, "Error closing temporary reparsepoint open\n");
251 initiate_cifs_search(const unsigned int xid
, struct file
*file
)
255 char *full_path
= NULL
;
256 struct cifsFileInfo
*cifsFile
;
257 struct cifs_sb_info
*cifs_sb
= CIFS_SB(file
->f_path
.dentry
->d_sb
);
258 struct tcon_link
*tlink
= NULL
;
259 struct cifs_tcon
*tcon
;
260 struct TCP_Server_Info
*server
;
262 if (file
->private_data
== NULL
) {
263 tlink
= cifs_sb_tlink(cifs_sb
);
265 return PTR_ERR(tlink
);
267 cifsFile
= kzalloc(sizeof(struct cifsFileInfo
), GFP_KERNEL
);
268 if (cifsFile
== NULL
) {
272 file
->private_data
= cifsFile
;
273 cifsFile
->tlink
= cifs_get_tlink(tlink
);
274 tcon
= tlink_tcon(tlink
);
276 cifsFile
= file
->private_data
;
277 tcon
= tlink_tcon(cifsFile
->tlink
);
280 server
= tcon
->ses
->server
;
282 if (!server
->ops
->query_dir_first
) {
287 cifsFile
->invalidHandle
= true;
288 cifsFile
->srch_inf
.endOfSearch
= false;
290 full_path
= build_path_from_dentry(file
->f_path
.dentry
);
291 if (full_path
== NULL
) {
296 cifs_dbg(FYI
, "Full path: %s start at: %lld\n", full_path
, file
->f_pos
);
299 /* test for Unix extensions */
300 /* but now check for them on the share/mount not on the SMB session */
301 /* if (cap_unix(tcon->ses) { */
303 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_UNIX
;
304 else if ((tcon
->ses
->capabilities
&
305 tcon
->ses
->server
->vals
->cap_nt_find
) == 0) {
306 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_INFO_STANDARD
;
307 } else if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) {
308 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_ID_FULL_DIR_INFO
;
309 } else /* not srvinos - BB fixme add check for backlevel? */ {
310 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_DIRECTORY_INFO
;
313 search_flags
= CIFS_SEARCH_CLOSE_AT_END
| CIFS_SEARCH_RETURN_RESUME
;
314 if (backup_cred(cifs_sb
))
315 search_flags
|= CIFS_SEARCH_BACKUP_SEARCH
;
317 rc
= server
->ops
->query_dir_first(xid
, tcon
, full_path
, cifs_sb
,
318 &cifsFile
->fid
, search_flags
,
319 &cifsFile
->srch_inf
);
322 cifsFile
->invalidHandle
= false;
323 /* BB add following call to handle readdir on new NTFS symlink errors
324 else if STATUS_STOPPED_ON_SYMLINK
325 call get_symlink_reparse_path and retry with new path */
326 else if ((rc
== -EOPNOTSUPP
) &&
327 (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)) {
328 cifs_sb
->mnt_cifs_flags
&= ~CIFS_MOUNT_SERVER_INUM
;
333 cifs_put_tlink(tlink
);
337 /* return length of unicode string in bytes */
338 static int cifs_unicode_bytelen(const char *str
)
341 const __le16
*ustr
= (const __le16
*)str
;
343 for (len
= 0; len
<= PATH_MAX
; len
++) {
347 cifs_dbg(FYI
, "Unicode string longer than PATH_MAX found\n");
351 static char *nxt_dir_entry(char *old_entry
, char *end_of_smb
, int level
)
354 FILE_DIRECTORY_INFO
*pDirInfo
= (FILE_DIRECTORY_INFO
*)old_entry
;
356 if (level
== SMB_FIND_FILE_INFO_STANDARD
) {
357 FIND_FILE_STANDARD_INFO
*pfData
;
358 pfData
= (FIND_FILE_STANDARD_INFO
*)pDirInfo
;
360 new_entry
= old_entry
+ sizeof(FIND_FILE_STANDARD_INFO
) +
361 pfData
->FileNameLength
;
363 new_entry
= old_entry
+ le32_to_cpu(pDirInfo
->NextEntryOffset
);
364 cifs_dbg(FYI
, "new entry %p old entry %p\n", new_entry
, old_entry
);
365 /* validate that new_entry is not past end of SMB */
366 if (new_entry
>= end_of_smb
) {
367 cifs_dbg(VFS
, "search entry %p began after end of SMB %p old entry %p\n",
368 new_entry
, end_of_smb
, old_entry
);
370 } else if (((level
== SMB_FIND_FILE_INFO_STANDARD
) &&
371 (new_entry
+ sizeof(FIND_FILE_STANDARD_INFO
) > end_of_smb
))
372 || ((level
!= SMB_FIND_FILE_INFO_STANDARD
) &&
373 (new_entry
+ sizeof(FILE_DIRECTORY_INFO
) > end_of_smb
))) {
374 cifs_dbg(VFS
, "search entry %p extends after end of SMB %p\n",
375 new_entry
, end_of_smb
);
389 static void cifs_fill_dirent_unix(struct cifs_dirent
*de
,
390 const FILE_UNIX_INFO
*info
, bool is_unicode
)
392 de
->name
= &info
->FileName
[0];
394 de
->namelen
= cifs_unicode_bytelen(de
->name
);
396 de
->namelen
= strnlen(de
->name
, PATH_MAX
);
397 de
->resume_key
= info
->ResumeKey
;
398 de
->ino
= le64_to_cpu(info
->basic
.UniqueId
);
401 static void cifs_fill_dirent_dir(struct cifs_dirent
*de
,
402 const FILE_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_full(struct cifs_dirent
*de
,
410 const FILE_FULL_DIRECTORY_INFO
*info
)
412 de
->name
= &info
->FileName
[0];
413 de
->namelen
= le32_to_cpu(info
->FileNameLength
);
414 de
->resume_key
= info
->FileIndex
;
417 static void cifs_fill_dirent_search(struct cifs_dirent
*de
,
418 const SEARCH_ID_FULL_DIR_INFO
*info
)
420 de
->name
= &info
->FileName
[0];
421 de
->namelen
= le32_to_cpu(info
->FileNameLength
);
422 de
->resume_key
= info
->FileIndex
;
423 de
->ino
= le64_to_cpu(info
->UniqueId
);
426 static void cifs_fill_dirent_both(struct cifs_dirent
*de
,
427 const FILE_BOTH_DIRECTORY_INFO
*info
)
429 de
->name
= &info
->FileName
[0];
430 de
->namelen
= le32_to_cpu(info
->FileNameLength
);
431 de
->resume_key
= info
->FileIndex
;
434 static void cifs_fill_dirent_std(struct cifs_dirent
*de
,
435 const FIND_FILE_STANDARD_INFO
*info
)
437 de
->name
= &info
->FileName
[0];
438 /* one byte length, no endianess conversion */
439 de
->namelen
= info
->FileNameLength
;
440 de
->resume_key
= info
->ResumeKey
;
443 static int cifs_fill_dirent(struct cifs_dirent
*de
, const void *info
,
444 u16 level
, bool is_unicode
)
446 memset(de
, 0, sizeof(*de
));
449 case SMB_FIND_FILE_UNIX
:
450 cifs_fill_dirent_unix(de
, info
, is_unicode
);
452 case SMB_FIND_FILE_DIRECTORY_INFO
:
453 cifs_fill_dirent_dir(de
, info
);
455 case SMB_FIND_FILE_FULL_DIRECTORY_INFO
:
456 cifs_fill_dirent_full(de
, info
);
458 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
459 cifs_fill_dirent_search(de
, info
);
461 case SMB_FIND_FILE_BOTH_DIRECTORY_INFO
:
462 cifs_fill_dirent_both(de
, info
);
464 case SMB_FIND_FILE_INFO_STANDARD
:
465 cifs_fill_dirent_std(de
, info
);
468 cifs_dbg(FYI
, "Unknown findfirst level %d\n", level
);
475 #define UNICODE_DOT cpu_to_le16(0x2e)
477 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
478 static int cifs_entry_is_dot(struct cifs_dirent
*de
, bool is_unicode
)
486 __le16
*ufilename
= (__le16
*)de
->name
;
487 if (de
->namelen
== 2) {
489 if (ufilename
[0] == UNICODE_DOT
)
491 } else if (de
->namelen
== 4) {
493 if (ufilename
[0] == UNICODE_DOT
&&
494 ufilename
[1] == UNICODE_DOT
)
498 if (de
->namelen
== 1) {
499 if (de
->name
[0] == '.')
501 } else if (de
->namelen
== 2) {
502 if (de
->name
[0] == '.' && de
->name
[1] == '.')
510 /* Check if directory that we are searching has changed so we can decide
511 whether we can use the cached search results from the previous search */
512 static int is_dir_changed(struct file
*file
)
514 struct inode
*inode
= file_inode(file
);
515 struct cifsInodeInfo
*cifsInfo
= CIFS_I(inode
);
517 if (cifsInfo
->time
== 0)
518 return 1; /* directory was changed, perhaps due to unlink */
524 static int cifs_save_resume_key(const char *current_entry
,
525 struct cifsFileInfo
*file_info
)
527 struct cifs_dirent de
;
530 rc
= cifs_fill_dirent(&de
, current_entry
, file_info
->srch_inf
.info_level
,
531 file_info
->srch_inf
.unicode
);
533 file_info
->srch_inf
.presume_name
= de
.name
;
534 file_info
->srch_inf
.resume_name_len
= de
.namelen
;
535 file_info
->srch_inf
.resume_key
= de
.resume_key
;
541 * Find the corresponding entry in the search. Note that the SMB server returns
542 * search entries for . and .. which complicates logic here if we choose to
543 * parse for them and we do not assume that they are located in the findfirst
544 * return buffer. We start counting in the buffer with entry 2 and increment for
545 * every entry (do not increment for . or .. entry).
548 find_cifs_entry(const unsigned int xid
, struct cifs_tcon
*tcon
,
549 struct file
*file
, char **current_entry
, int *num_to_ret
)
554 loff_t first_entry_in_buffer
;
555 loff_t index_to_find
= file
->f_pos
;
556 struct cifsFileInfo
*cfile
= file
->private_data
;
557 struct cifs_sb_info
*cifs_sb
= CIFS_SB(file
->f_path
.dentry
->d_sb
);
558 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
559 /* check if index in the buffer */
561 if (!server
->ops
->query_dir_first
|| !server
->ops
->query_dir_next
)
564 if ((cfile
== NULL
) || (current_entry
== NULL
) || (num_to_ret
== NULL
))
567 *current_entry
= NULL
;
568 first_entry_in_buffer
= cfile
->srch_inf
.index_of_last_entry
-
569 cfile
->srch_inf
.entries_in_buffer
;
572 * If first entry in buf is zero then is first buffer
573 * in search response data which means it is likely . and ..
574 * will be in this buffer, although some servers do not return
575 * . and .. for the root of a drive and for those we need
576 * to start two entries earlier.
579 dump_cifs_file_struct(file
, "In fce ");
580 if (((index_to_find
< cfile
->srch_inf
.index_of_last_entry
) &&
581 is_dir_changed(file
)) || (index_to_find
< first_entry_in_buffer
)) {
582 /* close and restart search */
583 cifs_dbg(FYI
, "search backing up - close and restart search\n");
584 spin_lock(&cifs_file_list_lock
);
585 if (server
->ops
->dir_needs_close(cfile
)) {
586 cfile
->invalidHandle
= true;
587 spin_unlock(&cifs_file_list_lock
);
588 if (server
->ops
->close_dir
)
589 server
->ops
->close_dir(xid
, tcon
, &cfile
->fid
);
591 spin_unlock(&cifs_file_list_lock
);
592 if (cfile
->srch_inf
.ntwrk_buf_start
) {
593 cifs_dbg(FYI
, "freeing SMB ff cache buf on search rewind\n");
594 if (cfile
->srch_inf
.smallBuf
)
595 cifs_small_buf_release(cfile
->srch_inf
.
598 cifs_buf_release(cfile
->srch_inf
.
600 cfile
->srch_inf
.ntwrk_buf_start
= NULL
;
602 rc
= initiate_cifs_search(xid
, file
);
604 cifs_dbg(FYI
, "error %d reinitiating a search on rewind\n",
608 /* FindFirst/Next set last_entry to NULL on malformed reply */
609 if (cfile
->srch_inf
.last_entry
)
610 cifs_save_resume_key(cfile
->srch_inf
.last_entry
, cfile
);
613 search_flags
= CIFS_SEARCH_CLOSE_AT_END
| CIFS_SEARCH_RETURN_RESUME
;
614 if (backup_cred(cifs_sb
))
615 search_flags
|= CIFS_SEARCH_BACKUP_SEARCH
;
617 while ((index_to_find
>= cfile
->srch_inf
.index_of_last_entry
) &&
618 (rc
== 0) && !cfile
->srch_inf
.endOfSearch
) {
619 cifs_dbg(FYI
, "calling findnext2\n");
620 rc
= server
->ops
->query_dir_next(xid
, tcon
, &cfile
->fid
,
623 /* FindFirst/Next set last_entry to NULL on malformed reply */
624 if (cfile
->srch_inf
.last_entry
)
625 cifs_save_resume_key(cfile
->srch_inf
.last_entry
, cfile
);
629 if (index_to_find
< cfile
->srch_inf
.index_of_last_entry
) {
630 /* we found the buffer that contains the entry */
631 /* scan and find it */
634 char *end_of_smb
= cfile
->srch_inf
.ntwrk_buf_start
+
635 server
->ops
->calc_smb_size(
636 cfile
->srch_inf
.ntwrk_buf_start
);
638 cur_ent
= cfile
->srch_inf
.srch_entries_start
;
639 first_entry_in_buffer
= cfile
->srch_inf
.index_of_last_entry
640 - cfile
->srch_inf
.entries_in_buffer
;
641 pos_in_buf
= index_to_find
- first_entry_in_buffer
;
642 cifs_dbg(FYI
, "found entry - pos_in_buf %d\n", pos_in_buf
);
644 for (i
= 0; (i
< (pos_in_buf
)) && (cur_ent
!= NULL
); i
++) {
645 /* go entry by entry figuring out which is first */
646 cur_ent
= nxt_dir_entry(cur_ent
, end_of_smb
,
647 cfile
->srch_inf
.info_level
);
649 if ((cur_ent
== NULL
) && (i
< pos_in_buf
)) {
650 /* BB fixme - check if we should flag this error */
651 cifs_dbg(VFS
, "reached end of buf searching for pos in buf %d index to find %lld rc %d\n",
652 pos_in_buf
, index_to_find
, rc
);
655 *current_entry
= cur_ent
;
657 cifs_dbg(FYI
, "index not in buffer - could not findnext into it\n");
661 if (pos_in_buf
>= cfile
->srch_inf
.entries_in_buffer
) {
662 cifs_dbg(FYI
, "can not return entries pos_in_buf beyond last\n");
665 *num_to_ret
= cfile
->srch_inf
.entries_in_buffer
- pos_in_buf
;
670 static int cifs_filldir(char *find_entry
, struct file
*file
, filldir_t filldir
,
671 void *dirent
, char *scratch_buf
, unsigned int max_len
)
673 struct cifsFileInfo
*file_info
= file
->private_data
;
674 struct super_block
*sb
= file
->f_path
.dentry
->d_sb
;
675 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
676 struct cifs_dirent de
= { NULL
, };
677 struct cifs_fattr fattr
;
682 rc
= cifs_fill_dirent(&de
, find_entry
, file_info
->srch_inf
.info_level
,
683 file_info
->srch_inf
.unicode
);
687 if (de
.namelen
> max_len
) {
688 cifs_dbg(VFS
, "bad search response length %zd past smb end\n",
693 /* skip . and .. since we added them first */
694 if (cifs_entry_is_dot(&de
, file_info
->srch_inf
.unicode
))
697 if (file_info
->srch_inf
.unicode
) {
698 struct nls_table
*nlt
= cifs_sb
->local_nls
;
700 name
.name
= scratch_buf
;
702 cifs_from_utf16((char *)name
.name
, (__le16
*)de
.name
,
704 min_t(size_t, de
.namelen
,
705 (size_t)max_len
), nlt
,
706 cifs_sb
->mnt_cifs_flags
&
707 CIFS_MOUNT_MAP_SPECIAL_CHR
);
708 name
.len
-= nls_nullsize(nlt
);
711 name
.len
= de
.namelen
;
714 switch (file_info
->srch_inf
.info_level
) {
715 case SMB_FIND_FILE_UNIX
:
716 cifs_unix_basic_to_fattr(&fattr
,
717 &((FILE_UNIX_INFO
*)find_entry
)->basic
,
720 case SMB_FIND_FILE_INFO_STANDARD
:
721 cifs_std_info_to_fattr(&fattr
,
722 (FIND_FILE_STANDARD_INFO
*)find_entry
,
726 cifs_dir_info_to_fattr(&fattr
,
727 (FILE_DIRECTORY_INFO
*)find_entry
,
732 if (de
.ino
&& (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)) {
733 fattr
.cf_uniqueid
= de
.ino
;
735 fattr
.cf_uniqueid
= iunique(sb
, ROOT_I
);
736 cifs_autodisable_serverino(cifs_sb
);
739 if ((cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MF_SYMLINKS
) &&
740 CIFSCouldBeMFSymlink(&fattr
))
742 * trying to get the type and mode can be slow,
743 * so just call those regular files for now, and mark
746 fattr
.cf_flags
|= CIFS_FATTR_NEED_REVAL
;
748 cifs_prime_dcache(file
->f_dentry
, &name
, &fattr
);
750 ino
= cifs_uniqueid_to_ino_t(fattr
.cf_uniqueid
);
751 rc
= filldir(dirent
, name
.name
, name
.len
, file
->f_pos
, ino
,
757 int cifs_readdir(struct file
*file
, void *direntry
, filldir_t filldir
)
762 struct cifs_tcon
*tcon
;
763 struct cifsFileInfo
*cifsFile
= NULL
;
766 char *tmp_buf
= NULL
;
768 unsigned int max_len
;
773 * Ensure FindFirst doesn't fail before doing filldir() for '.' and
774 * '..'. Otherwise we won't be able to notify VFS in case of failure.
776 if (file
->private_data
== NULL
) {
777 rc
= initiate_cifs_search(xid
, file
);
778 cifs_dbg(FYI
, "initiate cifs search rc %d\n", rc
);
783 switch ((int) file
->f_pos
) {
785 if (filldir(direntry
, ".", 1, file
->f_pos
,
786 file_inode(file
)->i_ino
, DT_DIR
) < 0) {
787 cifs_dbg(VFS
, "Filldir for current dir failed\n");
793 if (filldir(direntry
, "..", 2, file
->f_pos
,
794 parent_ino(file
->f_path
.dentry
), DT_DIR
) < 0) {
795 cifs_dbg(VFS
, "Filldir for parent dir failed\n");
801 /* 1) If search is active,
802 is in current search buffer?
803 if it before then restart search
804 if after then keep searching till find it */
806 if (file
->private_data
== NULL
) {
811 cifsFile
= file
->private_data
;
812 if (cifsFile
->srch_inf
.endOfSearch
) {
813 if (cifsFile
->srch_inf
.emptyDir
) {
814 cifs_dbg(FYI
, "End of search, empty dir\n");
819 cifsFile->invalidHandle = true;
820 tcon->ses->server->close(xid, tcon, &cifsFile->fid);
823 tcon
= tlink_tcon(cifsFile
->tlink
);
824 rc
= find_cifs_entry(xid
, tcon
, file
, ¤t_entry
,
827 cifs_dbg(FYI
, "fce error %d\n", rc
);
829 } else if (current_entry
!= NULL
) {
830 cifs_dbg(FYI
, "entry %lld found\n", file
->f_pos
);
832 cifs_dbg(FYI
, "could not find entry\n");
835 cifs_dbg(FYI
, "loop through %d times filling dir for net buf %p\n",
836 num_to_fill
, cifsFile
->srch_inf
.ntwrk_buf_start
);
837 max_len
= tcon
->ses
->server
->ops
->calc_smb_size(
838 cifsFile
->srch_inf
.ntwrk_buf_start
);
839 end_of_smb
= cifsFile
->srch_inf
.ntwrk_buf_start
+ max_len
;
841 tmp_buf
= kmalloc(UNICODE_NAME_MAX
, GFP_KERNEL
);
842 if (tmp_buf
== NULL
) {
847 for (i
= 0; (i
< num_to_fill
) && (rc
== 0); i
++) {
848 if (current_entry
== NULL
) {
849 /* evaluate whether this case is an error */
850 cifs_dbg(VFS
, "past SMB end, num to fill %d i %d\n",
855 * if buggy server returns . and .. late do we want to
856 * check for that here?
858 rc
= cifs_filldir(current_entry
, file
, filldir
,
859 direntry
, tmp_buf
, max_len
);
860 if (rc
== -EOVERFLOW
) {
867 cifsFile
->srch_inf
.index_of_last_entry
) {
868 cifs_dbg(FYI
, "last entry in buf at pos %lld %s\n",
869 file
->f_pos
, tmp_buf
);
870 cifs_save_resume_key(current_entry
, cifsFile
);
874 nxt_dir_entry(current_entry
, end_of_smb
,
875 cifsFile
->srch_inf
.info_level
);