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
);
90 inode
= dentry
->d_inode
;
91 /* update inode in place if i_ino didn't change */
92 if (inode
&& CIFS_I(inode
)->uniqueid
== fattr
->cf_uniqueid
) {
93 cifs_fattr_to_inode(inode
, fattr
);
96 err
= d_invalidate(dentry
);
102 dentry
= d_alloc(parent
, name
);
106 inode
= cifs_iget(sb
, fattr
);
112 alias
= d_materialise_unique(dentry
, inode
);
124 cifs_fill_common_info(struct cifs_fattr
*fattr
, struct cifs_sb_info
*cifs_sb
)
126 fattr
->cf_uid
= cifs_sb
->mnt_uid
;
127 fattr
->cf_gid
= cifs_sb
->mnt_gid
;
129 if (fattr
->cf_cifsattrs
& ATTR_DIRECTORY
) {
130 fattr
->cf_mode
= S_IFDIR
| cifs_sb
->mnt_dir_mode
;
131 fattr
->cf_dtype
= DT_DIR
;
133 fattr
->cf_mode
= S_IFREG
| cifs_sb
->mnt_file_mode
;
134 fattr
->cf_dtype
= DT_REG
;
137 if (fattr
->cf_cifsattrs
& ATTR_READONLY
)
138 fattr
->cf_mode
&= ~S_IWUGO
;
141 * We of course don't get ACL info in FIND_FIRST/NEXT results, so
142 * mark it for revalidation so that "ls -l" will look right. It might
143 * be super-slow, but if we don't do this then the ownership of files
144 * may look wrong since the inodes may not have timed out by the time
145 * "ls" does a stat() call on them.
147 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_CIFS_ACL
)
148 fattr
->cf_flags
|= CIFS_FATTR_NEED_REVAL
;
150 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UNX_EMUL
&&
151 fattr
->cf_cifsattrs
& ATTR_SYSTEM
) {
152 if (fattr
->cf_eof
== 0) {
153 fattr
->cf_mode
&= ~S_IFMT
;
154 fattr
->cf_mode
|= S_IFIFO
;
155 fattr
->cf_dtype
= DT_FIFO
;
158 * trying to get the type and mode via SFU can be slow,
159 * so just call those regular files for now, and mark
162 fattr
->cf_flags
|= CIFS_FATTR_NEED_REVAL
;
168 cifs_dir_info_to_fattr(struct cifs_fattr
*fattr
, FILE_DIRECTORY_INFO
*info
,
169 struct cifs_sb_info
*cifs_sb
)
171 memset(fattr
, 0, sizeof(*fattr
));
172 fattr
->cf_cifsattrs
= le32_to_cpu(info
->ExtFileAttributes
);
173 fattr
->cf_eof
= le64_to_cpu(info
->EndOfFile
);
174 fattr
->cf_bytes
= le64_to_cpu(info
->AllocationSize
);
175 fattr
->cf_createtime
= le64_to_cpu(info
->CreationTime
);
176 fattr
->cf_atime
= cifs_NTtimeToUnix(info
->LastAccessTime
);
177 fattr
->cf_ctime
= cifs_NTtimeToUnix(info
->ChangeTime
);
178 fattr
->cf_mtime
= cifs_NTtimeToUnix(info
->LastWriteTime
);
180 cifs_fill_common_info(fattr
, cifs_sb
);
184 cifs_std_info_to_fattr(struct cifs_fattr
*fattr
, FIND_FILE_STANDARD_INFO
*info
,
185 struct cifs_sb_info
*cifs_sb
)
187 int offset
= cifs_sb_master_tcon(cifs_sb
)->ses
->server
->timeAdj
;
189 memset(fattr
, 0, sizeof(*fattr
));
190 fattr
->cf_atime
= cnvrtDosUnixTm(info
->LastAccessDate
,
191 info
->LastAccessTime
, offset
);
192 fattr
->cf_ctime
= cnvrtDosUnixTm(info
->LastWriteDate
,
193 info
->LastWriteTime
, offset
);
194 fattr
->cf_mtime
= cnvrtDosUnixTm(info
->LastWriteDate
,
195 info
->LastWriteTime
, offset
);
197 fattr
->cf_cifsattrs
= le16_to_cpu(info
->Attributes
);
198 fattr
->cf_bytes
= le32_to_cpu(info
->AllocationSize
);
199 fattr
->cf_eof
= le32_to_cpu(info
->DataSize
);
201 cifs_fill_common_info(fattr
, cifs_sb
);
204 /* BB eventually need to add the following helper function to
205 resolve NT_STATUS_STOPPED_ON_SYMLINK return code when
206 we try to do FindFirst on (NTFS) directory symlinks */
208 int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
215 struct cifs_tcon *ptcon = cifs_sb_tcon(cifs_sb);
218 rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ,
219 OPEN_REPARSE_POINT, &fid, &oplock, NULL,
221 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
223 tmpbuffer = kmalloc(maxpath);
224 rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path,
229 if (CIFSSMBClose(xid, ptcon, fid)) {
230 cFYI(1, "Error closing temporary reparsepoint open");
237 initiate_cifs_search(const unsigned int xid
, struct file
*file
)
241 char *full_path
= NULL
;
242 struct cifsFileInfo
*cifsFile
;
243 struct cifs_sb_info
*cifs_sb
= CIFS_SB(file
->f_path
.dentry
->d_sb
);
244 struct tcon_link
*tlink
= NULL
;
245 struct cifs_tcon
*tcon
;
246 struct TCP_Server_Info
*server
;
248 if (file
->private_data
== NULL
) {
249 tlink
= cifs_sb_tlink(cifs_sb
);
251 return PTR_ERR(tlink
);
253 cifsFile
= kzalloc(sizeof(struct cifsFileInfo
), GFP_KERNEL
);
254 if (cifsFile
== NULL
) {
258 file
->private_data
= cifsFile
;
259 cifsFile
->tlink
= cifs_get_tlink(tlink
);
260 tcon
= tlink_tcon(tlink
);
262 cifsFile
= file
->private_data
;
263 tcon
= tlink_tcon(cifsFile
->tlink
);
266 server
= tcon
->ses
->server
;
268 if (!server
->ops
->query_dir_first
) {
273 cifsFile
->invalidHandle
= true;
274 cifsFile
->srch_inf
.endOfSearch
= false;
276 full_path
= build_path_from_dentry(file
->f_path
.dentry
);
277 if (full_path
== NULL
) {
282 cFYI(1, "Full path: %s start at: %lld", full_path
, file
->f_pos
);
285 /* test for Unix extensions */
286 /* but now check for them on the share/mount not on the SMB session */
287 /* if (cap_unix(tcon->ses) { */
289 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_UNIX
;
290 else if ((tcon
->ses
->capabilities
&
291 tcon
->ses
->server
->vals
->cap_nt_find
) == 0) {
292 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_INFO_STANDARD
;
293 } else if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) {
294 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_ID_FULL_DIR_INFO
;
295 } else /* not srvinos - BB fixme add check for backlevel? */ {
296 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_DIRECTORY_INFO
;
299 search_flags
= CIFS_SEARCH_CLOSE_AT_END
| CIFS_SEARCH_RETURN_RESUME
;
300 if (backup_cred(cifs_sb
))
301 search_flags
|= CIFS_SEARCH_BACKUP_SEARCH
;
303 rc
= server
->ops
->query_dir_first(xid
, tcon
, full_path
, cifs_sb
,
304 &cifsFile
->fid
, search_flags
,
305 &cifsFile
->srch_inf
);
308 cifsFile
->invalidHandle
= false;
309 /* BB add following call to handle readdir on new NTFS symlink errors
310 else if STATUS_STOPPED_ON_SYMLINK
311 call get_symlink_reparse_path and retry with new path */
312 else if ((rc
== -EOPNOTSUPP
) &&
313 (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)) {
314 cifs_sb
->mnt_cifs_flags
&= ~CIFS_MOUNT_SERVER_INUM
;
319 cifs_put_tlink(tlink
);
323 /* return length of unicode string in bytes */
324 static int cifs_unicode_bytelen(const char *str
)
327 const __le16
*ustr
= (const __le16
*)str
;
329 for (len
= 0; len
<= PATH_MAX
; len
++) {
333 cFYI(1, "Unicode string longer than PATH_MAX found");
337 static char *nxt_dir_entry(char *old_entry
, char *end_of_smb
, int level
)
340 FILE_DIRECTORY_INFO
*pDirInfo
= (FILE_DIRECTORY_INFO
*)old_entry
;
342 if (level
== SMB_FIND_FILE_INFO_STANDARD
) {
343 FIND_FILE_STANDARD_INFO
*pfData
;
344 pfData
= (FIND_FILE_STANDARD_INFO
*)pDirInfo
;
346 new_entry
= old_entry
+ sizeof(FIND_FILE_STANDARD_INFO
) +
347 pfData
->FileNameLength
;
349 new_entry
= old_entry
+ le32_to_cpu(pDirInfo
->NextEntryOffset
);
350 cFYI(1, "new entry %p old entry %p", new_entry
, old_entry
);
351 /* validate that new_entry is not past end of SMB */
352 if (new_entry
>= end_of_smb
) {
353 cERROR(1, "search entry %p began after end of SMB %p old entry %p",
354 new_entry
, end_of_smb
, old_entry
);
356 } else if (((level
== SMB_FIND_FILE_INFO_STANDARD
) &&
357 (new_entry
+ sizeof(FIND_FILE_STANDARD_INFO
) > end_of_smb
))
358 || ((level
!= SMB_FIND_FILE_INFO_STANDARD
) &&
359 (new_entry
+ sizeof(FILE_DIRECTORY_INFO
) > end_of_smb
))) {
360 cERROR(1, "search entry %p extends after end of SMB %p",
361 new_entry
, end_of_smb
);
375 static void cifs_fill_dirent_unix(struct cifs_dirent
*de
,
376 const FILE_UNIX_INFO
*info
, bool is_unicode
)
378 de
->name
= &info
->FileName
[0];
380 de
->namelen
= cifs_unicode_bytelen(de
->name
);
382 de
->namelen
= strnlen(de
->name
, PATH_MAX
);
383 de
->resume_key
= info
->ResumeKey
;
384 de
->ino
= le64_to_cpu(info
->basic
.UniqueId
);
387 static void cifs_fill_dirent_dir(struct cifs_dirent
*de
,
388 const FILE_DIRECTORY_INFO
*info
)
390 de
->name
= &info
->FileName
[0];
391 de
->namelen
= le32_to_cpu(info
->FileNameLength
);
392 de
->resume_key
= info
->FileIndex
;
395 static void cifs_fill_dirent_full(struct cifs_dirent
*de
,
396 const FILE_FULL_DIRECTORY_INFO
*info
)
398 de
->name
= &info
->FileName
[0];
399 de
->namelen
= le32_to_cpu(info
->FileNameLength
);
400 de
->resume_key
= info
->FileIndex
;
403 static void cifs_fill_dirent_search(struct cifs_dirent
*de
,
404 const SEARCH_ID_FULL_DIR_INFO
*info
)
406 de
->name
= &info
->FileName
[0];
407 de
->namelen
= le32_to_cpu(info
->FileNameLength
);
408 de
->resume_key
= info
->FileIndex
;
409 de
->ino
= le64_to_cpu(info
->UniqueId
);
412 static void cifs_fill_dirent_both(struct cifs_dirent
*de
,
413 const FILE_BOTH_DIRECTORY_INFO
*info
)
415 de
->name
= &info
->FileName
[0];
416 de
->namelen
= le32_to_cpu(info
->FileNameLength
);
417 de
->resume_key
= info
->FileIndex
;
420 static void cifs_fill_dirent_std(struct cifs_dirent
*de
,
421 const FIND_FILE_STANDARD_INFO
*info
)
423 de
->name
= &info
->FileName
[0];
424 /* one byte length, no endianess conversion */
425 de
->namelen
= info
->FileNameLength
;
426 de
->resume_key
= info
->ResumeKey
;
429 static int cifs_fill_dirent(struct cifs_dirent
*de
, const void *info
,
430 u16 level
, bool is_unicode
)
432 memset(de
, 0, sizeof(*de
));
435 case SMB_FIND_FILE_UNIX
:
436 cifs_fill_dirent_unix(de
, info
, is_unicode
);
438 case SMB_FIND_FILE_DIRECTORY_INFO
:
439 cifs_fill_dirent_dir(de
, info
);
441 case SMB_FIND_FILE_FULL_DIRECTORY_INFO
:
442 cifs_fill_dirent_full(de
, info
);
444 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
445 cifs_fill_dirent_search(de
, info
);
447 case SMB_FIND_FILE_BOTH_DIRECTORY_INFO
:
448 cifs_fill_dirent_both(de
, info
);
450 case SMB_FIND_FILE_INFO_STANDARD
:
451 cifs_fill_dirent_std(de
, info
);
454 cFYI(1, "Unknown findfirst level %d", level
);
461 #define UNICODE_DOT cpu_to_le16(0x2e)
463 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
464 static int cifs_entry_is_dot(struct cifs_dirent
*de
, bool is_unicode
)
472 __le16
*ufilename
= (__le16
*)de
->name
;
473 if (de
->namelen
== 2) {
475 if (ufilename
[0] == UNICODE_DOT
)
477 } else if (de
->namelen
== 4) {
479 if (ufilename
[0] == UNICODE_DOT
&&
480 ufilename
[1] == UNICODE_DOT
)
484 if (de
->namelen
== 1) {
485 if (de
->name
[0] == '.')
487 } else if (de
->namelen
== 2) {
488 if (de
->name
[0] == '.' && de
->name
[1] == '.')
496 /* Check if directory that we are searching has changed so we can decide
497 whether we can use the cached search results from the previous search */
498 static int is_dir_changed(struct file
*file
)
500 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
501 struct cifsInodeInfo
*cifsInfo
= CIFS_I(inode
);
503 if (cifsInfo
->time
== 0)
504 return 1; /* directory was changed, perhaps due to unlink */
510 static int cifs_save_resume_key(const char *current_entry
,
511 struct cifsFileInfo
*file_info
)
513 struct cifs_dirent de
;
516 rc
= cifs_fill_dirent(&de
, current_entry
, file_info
->srch_inf
.info_level
,
517 file_info
->srch_inf
.unicode
);
519 file_info
->srch_inf
.presume_name
= de
.name
;
520 file_info
->srch_inf
.resume_name_len
= de
.namelen
;
521 file_info
->srch_inf
.resume_key
= de
.resume_key
;
527 * Find the corresponding entry in the search. Note that the SMB server returns
528 * search entries for . and .. which complicates logic here if we choose to
529 * parse for them and we do not assume that they are located in the findfirst
530 * return buffer. We start counting in the buffer with entry 2 and increment for
531 * every entry (do not increment for . or .. entry).
534 find_cifs_entry(const unsigned int xid
, struct cifs_tcon
*tcon
,
535 struct file
*file
, char **current_entry
, int *num_to_ret
)
540 loff_t first_entry_in_buffer
;
541 loff_t index_to_find
= file
->f_pos
;
542 struct cifsFileInfo
*cfile
= file
->private_data
;
543 struct cifs_sb_info
*cifs_sb
= CIFS_SB(file
->f_path
.dentry
->d_sb
);
544 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
545 /* check if index in the buffer */
547 if (!server
->ops
->query_dir_first
|| !server
->ops
->query_dir_next
)
550 if ((cfile
== NULL
) || (current_entry
== NULL
) || (num_to_ret
== NULL
))
553 *current_entry
= NULL
;
554 first_entry_in_buffer
= cfile
->srch_inf
.index_of_last_entry
-
555 cfile
->srch_inf
.entries_in_buffer
;
558 * If first entry in buf is zero then is first buffer
559 * in search response data which means it is likely . and ..
560 * will be in this buffer, although some servers do not return
561 * . and .. for the root of a drive and for those we need
562 * to start two entries earlier.
565 dump_cifs_file_struct(file
, "In fce ");
566 if (((index_to_find
< cfile
->srch_inf
.index_of_last_entry
) &&
567 is_dir_changed(file
)) || (index_to_find
< first_entry_in_buffer
)) {
568 /* close and restart search */
569 cFYI(1, "search backing up - close and restart search");
570 spin_lock(&cifs_file_list_lock
);
571 if (!cfile
->srch_inf
.endOfSearch
&& !cfile
->invalidHandle
) {
572 cfile
->invalidHandle
= true;
573 spin_unlock(&cifs_file_list_lock
);
574 if (server
->ops
->close
)
575 server
->ops
->close(xid
, tcon
, &cfile
->fid
);
577 spin_unlock(&cifs_file_list_lock
);
578 if (cfile
->srch_inf
.ntwrk_buf_start
) {
579 cFYI(1, "freeing SMB ff cache buf on search rewind");
580 if (cfile
->srch_inf
.smallBuf
)
581 cifs_small_buf_release(cfile
->srch_inf
.
584 cifs_buf_release(cfile
->srch_inf
.
586 cfile
->srch_inf
.ntwrk_buf_start
= NULL
;
588 rc
= initiate_cifs_search(xid
, file
);
590 cFYI(1, "error %d reinitiating a search on rewind",
594 /* FindFirst/Next set last_entry to NULL on malformed reply */
595 if (cfile
->srch_inf
.last_entry
)
596 cifs_save_resume_key(cfile
->srch_inf
.last_entry
, cfile
);
599 search_flags
= CIFS_SEARCH_CLOSE_AT_END
| CIFS_SEARCH_RETURN_RESUME
;
600 if (backup_cred(cifs_sb
))
601 search_flags
|= CIFS_SEARCH_BACKUP_SEARCH
;
603 while ((index_to_find
>= cfile
->srch_inf
.index_of_last_entry
) &&
604 (rc
== 0) && !cfile
->srch_inf
.endOfSearch
) {
605 cFYI(1, "calling findnext2");
606 rc
= server
->ops
->query_dir_next(xid
, tcon
, &cfile
->fid
,
609 /* FindFirst/Next set last_entry to NULL on malformed reply */
610 if (cfile
->srch_inf
.last_entry
)
611 cifs_save_resume_key(cfile
->srch_inf
.last_entry
, cfile
);
615 if (index_to_find
< cfile
->srch_inf
.index_of_last_entry
) {
616 /* we found the buffer that contains the entry */
617 /* scan and find it */
620 char *end_of_smb
= cfile
->srch_inf
.ntwrk_buf_start
+
621 server
->ops
->calc_smb_size(
622 cfile
->srch_inf
.ntwrk_buf_start
);
624 cur_ent
= cfile
->srch_inf
.srch_entries_start
;
625 first_entry_in_buffer
= cfile
->srch_inf
.index_of_last_entry
626 - cfile
->srch_inf
.entries_in_buffer
;
627 pos_in_buf
= index_to_find
- first_entry_in_buffer
;
628 cFYI(1, "found entry - pos_in_buf %d", pos_in_buf
);
630 for (i
= 0; (i
< (pos_in_buf
)) && (cur_ent
!= NULL
); i
++) {
631 /* go entry by entry figuring out which is first */
632 cur_ent
= nxt_dir_entry(cur_ent
, end_of_smb
,
633 cfile
->srch_inf
.info_level
);
635 if ((cur_ent
== NULL
) && (i
< pos_in_buf
)) {
636 /* BB fixme - check if we should flag this error */
637 cERROR(1, "reached end of buf searching for pos in buf"
638 " %d index to find %lld rc %d", pos_in_buf
,
642 *current_entry
= cur_ent
;
644 cFYI(1, "index not in buffer - could not findnext into it");
648 if (pos_in_buf
>= cfile
->srch_inf
.entries_in_buffer
) {
649 cFYI(1, "can not return entries pos_in_buf beyond last");
652 *num_to_ret
= cfile
->srch_inf
.entries_in_buffer
- pos_in_buf
;
657 static int cifs_filldir(char *find_entry
, struct file
*file
, filldir_t filldir
,
658 void *dirent
, char *scratch_buf
, unsigned int max_len
)
660 struct cifsFileInfo
*file_info
= file
->private_data
;
661 struct super_block
*sb
= file
->f_path
.dentry
->d_sb
;
662 struct cifs_sb_info
*cifs_sb
= CIFS_SB(sb
);
663 struct cifs_dirent de
= { NULL
, };
664 struct cifs_fattr fattr
;
665 struct dentry
*dentry
;
670 rc
= cifs_fill_dirent(&de
, find_entry
, file_info
->srch_inf
.info_level
,
671 file_info
->srch_inf
.unicode
);
675 if (de
.namelen
> max_len
) {
676 cERROR(1, "bad search response length %zd past smb end",
681 /* skip . and .. since we added them first */
682 if (cifs_entry_is_dot(&de
, file_info
->srch_inf
.unicode
))
685 if (file_info
->srch_inf
.unicode
) {
686 struct nls_table
*nlt
= cifs_sb
->local_nls
;
688 name
.name
= scratch_buf
;
690 cifs_from_utf16((char *)name
.name
, (__le16
*)de
.name
,
692 min_t(size_t, de
.namelen
,
693 (size_t)max_len
), nlt
,
694 cifs_sb
->mnt_cifs_flags
&
695 CIFS_MOUNT_MAP_SPECIAL_CHR
);
696 name
.len
-= nls_nullsize(nlt
);
699 name
.len
= de
.namelen
;
702 switch (file_info
->srch_inf
.info_level
) {
703 case SMB_FIND_FILE_UNIX
:
704 cifs_unix_basic_to_fattr(&fattr
,
705 &((FILE_UNIX_INFO
*)find_entry
)->basic
,
708 case SMB_FIND_FILE_INFO_STANDARD
:
709 cifs_std_info_to_fattr(&fattr
,
710 (FIND_FILE_STANDARD_INFO
*)find_entry
,
714 cifs_dir_info_to_fattr(&fattr
,
715 (FILE_DIRECTORY_INFO
*)find_entry
,
720 if (de
.ino
&& (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)) {
721 fattr
.cf_uniqueid
= de
.ino
;
723 fattr
.cf_uniqueid
= iunique(sb
, ROOT_I
);
724 cifs_autodisable_serverino(cifs_sb
);
727 if ((cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MF_SYMLINKS
) &&
728 CIFSCouldBeMFSymlink(&fattr
))
730 * trying to get the type and mode can be slow,
731 * so just call those regular files for now, and mark
734 fattr
.cf_flags
|= CIFS_FATTR_NEED_REVAL
;
736 ino
= cifs_uniqueid_to_ino_t(fattr
.cf_uniqueid
);
737 dentry
= cifs_readdir_lookup(file
->f_dentry
, &name
, &fattr
);
739 rc
= filldir(dirent
, name
.name
, name
.len
, file
->f_pos
, ino
,
747 int cifs_readdir(struct file
*file
, void *direntry
, filldir_t filldir
)
752 struct cifs_tcon
*tcon
;
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 parent_ino(file
->f_path
.dentry
), 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 tcon->ses->server->close(xid, tcon, &cifsFile->fid);
813 tcon
= tlink_tcon(cifsFile
->tlink
);
814 rc
= find_cifs_entry(xid
, tcon
, file
, ¤t_entry
,
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
= tcon
->ses
->server
->ops
->calc_smb_size(
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",
845 * if buggy server returns . and .. late do we want to
846 * check for that here?
848 rc
= cifs_filldir(current_entry
, file
, filldir
,
849 direntry
, tmp_buf
, max_len
);
850 if (rc
== -EOVERFLOW
) {
857 cifsFile
->srch_inf
.index_of_last_entry
) {
858 cFYI(1, "last entry in buf at pos %lld %s",
859 file
->f_pos
, tmp_buf
);
860 cifs_save_resume_key(current_entry
, cifsFile
);
864 nxt_dir_entry(current_entry
, end_of_smb
,
865 cifsFile
->srch_inf
.info_level
);