4 * Directory search handling
6 * Copyright (C) International Business Machines Corp., 2004, 2005
7 * Author(s): Steve French (sfrench@us.ibm.com)
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <linux/stat.h>
25 #include <linux/smp_lock.h>
28 #include "cifsproto.h"
29 #include "cifs_unicode.h"
30 #include "cifs_debug.h"
31 #include "cifs_fs_sb.h"
34 /* BB fixme - add debug wrappers around this function to disable it fixme BB */
35 /* static void dump_cifs_file_struct(struct file *file, char *label)
37 struct cifsFileInfo * cf;
40 cf = file->private_data;
42 cFYI(1,("empty cifs private file data"));
45 if(cf->invalidHandle) {
46 cFYI(1,("invalid handle"));
48 if(cf->srch_inf.endOfSearch) {
49 cFYI(1,("end of search"));
51 if(cf->srch_inf.emptyDir) {
52 cFYI(1,("empty dir"));
58 /* Returns one if new inode created (which therefore needs to be hashed) */
59 /* Might check in the future if inode number changed so we can rehash inode */
60 static int construct_dentry(struct qstr
*qstring
, struct file
*file
,
61 struct inode
**ptmp_inode
, struct dentry
**pnew_dentry
)
63 struct dentry
*tmp_dentry
;
64 struct cifs_sb_info
*cifs_sb
;
65 struct cifsTconInfo
*pTcon
;
68 cFYI(1, ("For %s", qstring
->name
));
69 cifs_sb
= CIFS_SB(file
->f_dentry
->d_sb
);
70 pTcon
= cifs_sb
->tcon
;
72 qstring
->hash
= full_name_hash(qstring
->name
, qstring
->len
);
73 tmp_dentry
= d_lookup(file
->f_dentry
, qstring
);
75 cFYI(0, ("existing dentry with inode 0x%p", tmp_dentry
->d_inode
));
76 *ptmp_inode
= tmp_dentry
->d_inode
;
77 /* BB overwrite old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len??*/
78 if(*ptmp_inode
== NULL
) {
79 *ptmp_inode
= new_inode(file
->f_dentry
->d_sb
);
80 if(*ptmp_inode
== NULL
)
83 d_instantiate(tmp_dentry
, *ptmp_inode
);
86 tmp_dentry
= d_alloc(file
->f_dentry
, qstring
);
87 if(tmp_dentry
== NULL
) {
88 cERROR(1,("Failed allocating dentry"));
93 *ptmp_inode
= new_inode(file
->f_dentry
->d_sb
);
94 tmp_dentry
->d_op
= &cifs_dentry_ops
;
95 if(*ptmp_inode
== NULL
)
98 d_instantiate(tmp_dentry
, *ptmp_inode
);
102 tmp_dentry
->d_time
= jiffies
;
103 *pnew_dentry
= tmp_dentry
;
107 static void fill_in_inode(struct inode
*tmp_inode
,
108 FILE_DIRECTORY_INFO
*pfindData
, int *pobject_type
, int isNewInode
)
111 struct timespec local_mtime
;
113 struct cifsInodeInfo
*cifsInfo
= CIFS_I(tmp_inode
);
114 struct cifs_sb_info
*cifs_sb
= CIFS_SB(tmp_inode
->i_sb
);
115 __u32 attr
= le32_to_cpu(pfindData
->ExtFileAttributes
);
116 __u64 allocation_size
= le64_to_cpu(pfindData
->AllocationSize
);
117 __u64 end_of_file
= le64_to_cpu(pfindData
->EndOfFile
);
119 cifsInfo
->cifsAttrs
= attr
;
120 cifsInfo
->time
= jiffies
;
122 /* save mtime and size */
123 local_mtime
= tmp_inode
->i_mtime
;
124 local_size
= tmp_inode
->i_size
;
126 /* Linux can not store file creation time unfortunately so ignore it */
128 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastAccessTime
));
130 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastWriteTime
));
132 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->ChangeTime
));
133 /* treat dos attribute of read-only as read-only mode bit e.g. 555? */
134 /* 2767 perms - indicate mandatory locking */
135 /* BB fill in uid and gid here? with help from winbind?
136 or retrieve from NTFS stream extended attribute */
137 if (atomic_read(&cifsInfo
->inUse
) == 0) {
138 tmp_inode
->i_uid
= cifs_sb
->mnt_uid
;
139 tmp_inode
->i_gid
= cifs_sb
->mnt_gid
;
140 /* set default mode. will override for dirs below */
141 tmp_inode
->i_mode
= cifs_sb
->mnt_file_mode
;
144 if (attr
& ATTR_DIRECTORY
) {
145 *pobject_type
= DT_DIR
;
146 /* override default perms since we do not lock dirs */
147 if(atomic_read(&cifsInfo
->inUse
) == 0) {
148 tmp_inode
->i_mode
= cifs_sb
->mnt_dir_mode
;
150 tmp_inode
->i_mode
|= S_IFDIR
;
151 } else if ((cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UNX_EMUL
) &&
152 (attr
& ATTR_SYSTEM
) && (end_of_file
== 0)) {
153 *pobject_type
= DT_FIFO
;
154 tmp_inode
->i_mode
|= S_IFIFO
;
155 /* BB Finish for SFU style symlinks and devies */
156 /* } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
157 (attr & ATTR_SYSTEM) && ) { */
158 /* we no longer mark these because we could not follow them */
159 /* } else if (attr & ATTR_REPARSE) {
160 *pobject_type = DT_LNK;
161 tmp_inode->i_mode |= S_IFLNK; */
163 *pobject_type
= DT_REG
;
164 tmp_inode
->i_mode
|= S_IFREG
;
165 if (attr
& ATTR_READONLY
)
166 tmp_inode
->i_mode
&= ~(S_IWUGO
);
167 } /* could add code here - to validate if device or weird share type? */
169 /* can not fill in nlink here as in qpathinfo version and Unx search */
170 if (atomic_read(&cifsInfo
->inUse
) == 0) {
171 atomic_set(&cifsInfo
->inUse
, 1);
174 if (is_size_safe_to_change(cifsInfo
)) {
175 /* can not safely change the file size here if the
176 client is writing to it due to potential races */
177 i_size_write(tmp_inode
, end_of_file
);
179 /* 512 bytes (2**9) is the fake blocksize that must be used */
180 /* for this calculation, even though the reported blocksize is larger */
181 tmp_inode
->i_blocks
= (512 - 1 + allocation_size
) >> 9;
184 if (allocation_size
< end_of_file
)
185 cFYI(1, ("May be sparse file, allocation less than file size"));
187 ("File Size %ld and blocks %ld and blocksize %ld",
188 (unsigned long)tmp_inode
->i_size
, tmp_inode
->i_blocks
,
189 tmp_inode
->i_blksize
));
190 if (S_ISREG(tmp_inode
->i_mode
)) {
191 cFYI(1, ("File inode"));
192 tmp_inode
->i_op
= &cifs_file_inode_ops
;
193 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
)
194 tmp_inode
->i_fop
= &cifs_file_direct_ops
;
196 tmp_inode
->i_fop
= &cifs_file_ops
;
197 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops
;
200 return; /* No sense invalidating pages for new inode
201 since have not started caching readahead file
204 if (timespec_equal(&tmp_inode
->i_mtime
, &local_mtime
) &&
205 (local_size
== tmp_inode
->i_size
)) {
206 cFYI(1, ("inode exists but unchanged"));
208 /* file may have changed on server */
209 cFYI(1, ("invalidate inode, readdir detected change"));
210 invalidate_remote_inode(tmp_inode
);
212 } else if (S_ISDIR(tmp_inode
->i_mode
)) {
213 cFYI(1, ("Directory inode"));
214 tmp_inode
->i_op
= &cifs_dir_inode_ops
;
215 tmp_inode
->i_fop
= &cifs_dir_ops
;
216 } else if (S_ISLNK(tmp_inode
->i_mode
)) {
217 cFYI(1, ("Symbolic Link inode"));
218 tmp_inode
->i_op
= &cifs_symlink_inode_ops
;
220 cFYI(1, ("Init special inode"));
221 init_special_inode(tmp_inode
, tmp_inode
->i_mode
,
226 static void unix_fill_in_inode(struct inode
*tmp_inode
,
227 FILE_UNIX_INFO
*pfindData
, int *pobject_type
, int isNewInode
)
230 struct timespec local_mtime
;
232 struct cifsInodeInfo
*cifsInfo
= CIFS_I(tmp_inode
);
233 struct cifs_sb_info
*cifs_sb
= CIFS_SB(tmp_inode
->i_sb
);
235 __u32 type
= le32_to_cpu(pfindData
->Type
);
236 __u64 num_of_bytes
= le64_to_cpu(pfindData
->NumOfBytes
);
237 __u64 end_of_file
= le64_to_cpu(pfindData
->EndOfFile
);
238 cifsInfo
->time
= jiffies
;
239 atomic_inc(&cifsInfo
->inUse
);
241 /* save mtime and size */
242 local_mtime
= tmp_inode
->i_mtime
;
243 local_size
= tmp_inode
->i_size
;
246 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastAccessTime
));
248 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastModificationTime
));
250 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastStatusChange
));
252 tmp_inode
->i_mode
= le64_to_cpu(pfindData
->Permissions
);
253 if (type
== UNIX_FILE
) {
254 *pobject_type
= DT_REG
;
255 tmp_inode
->i_mode
|= S_IFREG
;
256 } else if (type
== UNIX_SYMLINK
) {
257 *pobject_type
= DT_LNK
;
258 tmp_inode
->i_mode
|= S_IFLNK
;
259 } else if (type
== UNIX_DIR
) {
260 *pobject_type
= DT_DIR
;
261 tmp_inode
->i_mode
|= S_IFDIR
;
262 } else if (type
== UNIX_CHARDEV
) {
263 *pobject_type
= DT_CHR
;
264 tmp_inode
->i_mode
|= S_IFCHR
;
265 tmp_inode
->i_rdev
= MKDEV(le64_to_cpu(pfindData
->DevMajor
),
266 le64_to_cpu(pfindData
->DevMinor
) & MINORMASK
);
267 } else if (type
== UNIX_BLOCKDEV
) {
268 *pobject_type
= DT_BLK
;
269 tmp_inode
->i_mode
|= S_IFBLK
;
270 tmp_inode
->i_rdev
= MKDEV(le64_to_cpu(pfindData
->DevMajor
),
271 le64_to_cpu(pfindData
->DevMinor
) & MINORMASK
);
272 } else if (type
== UNIX_FIFO
) {
273 *pobject_type
= DT_FIFO
;
274 tmp_inode
->i_mode
|= S_IFIFO
;
275 } else if (type
== UNIX_SOCKET
) {
276 *pobject_type
= DT_SOCK
;
277 tmp_inode
->i_mode
|= S_IFSOCK
;
280 tmp_inode
->i_uid
= le64_to_cpu(pfindData
->Uid
);
281 tmp_inode
->i_gid
= le64_to_cpu(pfindData
->Gid
);
282 tmp_inode
->i_nlink
= le64_to_cpu(pfindData
->Nlinks
);
284 if (is_size_safe_to_change(cifsInfo
)) {
285 /* can not safely change the file size here if the
286 client is writing to it due to potential races */
287 i_size_write(tmp_inode
,end_of_file
);
289 /* 512 bytes (2**9) is the fake blocksize that must be used */
290 /* for this calculation, not the real blocksize */
291 tmp_inode
->i_blocks
= (512 - 1 + num_of_bytes
) >> 9;
294 if (S_ISREG(tmp_inode
->i_mode
)) {
295 cFYI(1, ("File inode"));
296 tmp_inode
->i_op
= &cifs_file_inode_ops
;
297 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
)
298 tmp_inode
->i_fop
= &cifs_file_direct_ops
;
300 tmp_inode
->i_fop
= &cifs_file_ops
;
301 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops
;
304 return; /* No sense invalidating pages for new inode since we
305 have not started caching readahead file data yet */
307 if (timespec_equal(&tmp_inode
->i_mtime
, &local_mtime
) &&
308 (local_size
== tmp_inode
->i_size
)) {
309 cFYI(1, ("inode exists but unchanged"));
311 /* file may have changed on server */
312 cFYI(1, ("invalidate inode, readdir detected change"));
313 invalidate_remote_inode(tmp_inode
);
315 } else if (S_ISDIR(tmp_inode
->i_mode
)) {
316 cFYI(1, ("Directory inode"));
317 tmp_inode
->i_op
= &cifs_dir_inode_ops
;
318 tmp_inode
->i_fop
= &cifs_dir_ops
;
319 } else if (S_ISLNK(tmp_inode
->i_mode
)) {
320 cFYI(1, ("Symbolic Link inode"));
321 tmp_inode
->i_op
= &cifs_symlink_inode_ops
;
322 /* tmp_inode->i_fop = *//* do not need to set to anything */
324 cFYI(1, ("Special inode"));
325 init_special_inode(tmp_inode
, tmp_inode
->i_mode
,
330 static int initiate_cifs_search(const int xid
, struct file
*file
)
334 struct cifsFileInfo
* cifsFile
;
335 struct cifs_sb_info
*cifs_sb
;
336 struct cifsTconInfo
*pTcon
;
338 if(file
->private_data
== NULL
) {
340 kmalloc(sizeof(struct cifsFileInfo
),GFP_KERNEL
);
343 if(file
->private_data
== NULL
) {
346 memset(file
->private_data
,0,sizeof(struct cifsFileInfo
));
348 cifsFile
= file
->private_data
;
349 cifsFile
->invalidHandle
= TRUE
;
350 cifsFile
->srch_inf
.endOfSearch
= FALSE
;
352 if(file
->f_dentry
== NULL
)
355 cifs_sb
= CIFS_SB(file
->f_dentry
->d_sb
);
359 pTcon
= cifs_sb
->tcon
;
363 down(&file
->f_dentry
->d_sb
->s_vfs_rename_sem
);
364 full_path
= build_path_from_dentry(file
->f_dentry
, cifs_sb
);
365 up(&file
->f_dentry
->d_sb
->s_vfs_rename_sem
);
367 if(full_path
== NULL
) {
371 cFYI(1, ("Full path: %s start at: %lld", full_path
, file
->f_pos
));
374 /* test for Unix extensions */
375 if (pTcon
->ses
->capabilities
& CAP_UNIX
) {
376 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_UNIX
;
377 } else if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) {
378 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_ID_FULL_DIR_INFO
;
379 } else /* not srvinos - BB fixme add check for backlevel? */ {
380 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_DIRECTORY_INFO
;
383 rc
= CIFSFindFirst(xid
, pTcon
,full_path
,cifs_sb
->local_nls
,
384 &cifsFile
->netfid
, &cifsFile
->srch_inf
,
385 cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
, CIFS_DIR_SEP(cifs_sb
));
387 cifsFile
->invalidHandle
= FALSE
;
388 if((rc
== -EOPNOTSUPP
) &&
389 (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)) {
390 cifs_sb
->mnt_cifs_flags
&= ~CIFS_MOUNT_SERVER_INUM
;
397 /* return length of unicode string in bytes */
398 static int cifs_unicode_bytelen(char *str
)
401 __le16
* ustr
= (__le16
*)str
;
403 for(len
=0;len
<= PATH_MAX
;len
++) {
407 cFYI(1,("Unicode string longer than PATH_MAX found"));
411 static char *nxt_dir_entry(char *old_entry
, char *end_of_smb
)
414 FILE_DIRECTORY_INFO
* pDirInfo
= (FILE_DIRECTORY_INFO
*)old_entry
;
416 new_entry
= old_entry
+ le32_to_cpu(pDirInfo
->NextEntryOffset
);
417 cFYI(1,("new entry %p old entry %p",new_entry
,old_entry
));
418 /* validate that new_entry is not past end of SMB */
419 if(new_entry
>= end_of_smb
) {
421 ("search entry %p began after end of SMB %p old entry %p",
422 new_entry
, end_of_smb
, old_entry
));
424 } else if (new_entry
+ sizeof(FILE_DIRECTORY_INFO
) > end_of_smb
) {
425 cERROR(1,("search entry %p extends after end of SMB %p",
426 new_entry
, end_of_smb
));
433 #define UNICODE_DOT cpu_to_le16(0x2e)
435 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
436 static int cifs_entry_is_dot(char *current_entry
, struct cifsFileInfo
*cfile
)
439 char * filename
= NULL
;
442 if(cfile
->srch_inf
.info_level
== 0x202) {
443 FILE_UNIX_INFO
* pFindData
= (FILE_UNIX_INFO
*)current_entry
;
444 filename
= &pFindData
->FileName
[0];
445 if(cfile
->srch_inf
.unicode
) {
446 len
= cifs_unicode_bytelen(filename
);
448 /* BB should we make this strnlen of PATH_MAX? */
449 len
= strnlen(filename
, 5);
451 } else if(cfile
->srch_inf
.info_level
== 0x101) {
452 FILE_DIRECTORY_INFO
* pFindData
=
453 (FILE_DIRECTORY_INFO
*)current_entry
;
454 filename
= &pFindData
->FileName
[0];
455 len
= le32_to_cpu(pFindData
->FileNameLength
);
456 } else if(cfile
->srch_inf
.info_level
== 0x102) {
457 FILE_FULL_DIRECTORY_INFO
* pFindData
=
458 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
459 filename
= &pFindData
->FileName
[0];
460 len
= le32_to_cpu(pFindData
->FileNameLength
);
461 } else if(cfile
->srch_inf
.info_level
== 0x105) {
462 SEARCH_ID_FULL_DIR_INFO
* pFindData
=
463 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
464 filename
= &pFindData
->FileName
[0];
465 len
= le32_to_cpu(pFindData
->FileNameLength
);
466 } else if(cfile
->srch_inf
.info_level
== 0x104) {
467 FILE_BOTH_DIRECTORY_INFO
* pFindData
=
468 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
469 filename
= &pFindData
->FileName
[0];
470 len
= le32_to_cpu(pFindData
->FileNameLength
);
472 cFYI(1,("Unknown findfirst level %d",cfile
->srch_inf
.info_level
));
476 if(cfile
->srch_inf
.unicode
) {
477 __le16
*ufilename
= (__le16
*)filename
;
480 if(ufilename
[0] == UNICODE_DOT
)
482 } else if(len
== 4) {
484 if((ufilename
[0] == UNICODE_DOT
)
485 &&(ufilename
[1] == UNICODE_DOT
))
490 if(filename
[0] == '.')
492 } else if(len
== 2) {
493 if((filename
[0] == '.') && (filename
[1] == '.'))
502 /* find the corresponding entry in the search */
503 /* Note that the SMB server returns search entries for . and .. which
504 complicates logic here if we choose to parse for them and we do not
505 assume that they are located in the findfirst return buffer.*/
506 /* We start counting in the buffer with entry 2 and increment for every
507 entry (do not increment for . or .. entry) */
508 static int find_cifs_entry(const int xid
, struct cifsTconInfo
*pTcon
,
509 struct file
*file
, char **ppCurrentEntry
, int *num_to_ret
)
513 loff_t first_entry_in_buffer
;
514 loff_t index_to_find
= file
->f_pos
;
515 struct cifsFileInfo
* cifsFile
= file
->private_data
;
516 /* check if index in the buffer */
518 if((cifsFile
== NULL
) || (ppCurrentEntry
== NULL
) || (num_to_ret
== NULL
))
521 *ppCurrentEntry
= NULL
;
522 first_entry_in_buffer
=
523 cifsFile
->srch_inf
.index_of_last_entry
-
524 cifsFile
->srch_inf
.entries_in_buffer
;
525 /* dump_cifs_file_struct(file, "In fce ");*/
526 if(index_to_find
< first_entry_in_buffer
) {
527 /* close and restart search */
528 cFYI(1,("search backing up - close and restart search"));
529 cifsFile
->invalidHandle
= TRUE
;
530 CIFSFindClose(xid
, pTcon
, cifsFile
->netfid
);
531 kfree(cifsFile
->search_resume_name
);
532 cifsFile
->search_resume_name
= NULL
;
533 if(cifsFile
->srch_inf
.ntwrk_buf_start
) {
534 cFYI(1,("freeing SMB ff cache buf on search rewind"));
535 cifs_buf_release(cifsFile
->srch_inf
.ntwrk_buf_start
);
537 rc
= initiate_cifs_search(xid
,file
);
539 cFYI(1,("error %d reinitiating a search on rewind",rc
));
544 while((index_to_find
>= cifsFile
->srch_inf
.index_of_last_entry
) &&
545 (rc
== 0) && (cifsFile
->srch_inf
.endOfSearch
== FALSE
)){
546 cFYI(1,("calling findnext2"));
547 rc
= CIFSFindNext(xid
,pTcon
,cifsFile
->netfid
,
548 &cifsFile
->srch_inf
);
552 if(index_to_find
< cifsFile
->srch_inf
.index_of_last_entry
) {
553 /* we found the buffer that contains the entry */
554 /* scan and find it */
556 char * current_entry
;
557 char * end_of_smb
= cifsFile
->srch_inf
.ntwrk_buf_start
+
558 smbCalcSize((struct smb_hdr
*)
559 cifsFile
->srch_inf
.ntwrk_buf_start
);
560 /* dump_cifs_file_struct(file,"found entry in fce "); */
561 first_entry_in_buffer
= cifsFile
->srch_inf
.index_of_last_entry
562 - cifsFile
->srch_inf
.entries_in_buffer
;
563 pos_in_buf
= index_to_find
- first_entry_in_buffer
;
564 cFYI(1,("found entry - pos_in_buf %d",pos_in_buf
));
565 current_entry
= cifsFile
->srch_inf
.srch_entries_start
;
566 for(i
=0;(i
<(pos_in_buf
)) && (current_entry
!= NULL
);i
++) {
567 /* go entry by entry figuring out which is first */
570 rc
= cifs_entry_is_dot(current_entry
,cifsFile
);
571 if(rc
== 1) /* is . or .. so skip */ {
572 cFYI(1,("Entry is .")); /* BB removeme BB */
574 } else if (rc
== 2 ) {
575 cFYI(1,("Entry is ..")); /* BB removeme BB */
578 current_entry
= nxt_dir_entry(current_entry
,end_of_smb
);
580 if((current_entry
== NULL
) && (i
< pos_in_buf
)) {
581 /* BB fixme - check if we should flag this error */
582 cERROR(1,("reached end of buf searching for pos in buf"
583 " %d index to find %lld rc %d",
584 pos_in_buf
,index_to_find
,rc
));
587 *ppCurrentEntry
= current_entry
;
589 cFYI(1,("index not in buffer - could not findnext into it"));
593 if(pos_in_buf
>= cifsFile
->srch_inf
.entries_in_buffer
) {
594 cFYI(1,("can not return entries when pos_in_buf beyond last entry"));
597 *num_to_ret
= cifsFile
->srch_inf
.entries_in_buffer
- pos_in_buf
;
598 /* dump_cifs_file_struct(file, "end fce ");*/
603 /* inode num, inode type and filename returned */
604 static int cifs_get_name_from_search_buf(struct qstr
*pqst
,
605 char *current_entry
, __u16 level
, unsigned int unicode
,
606 struct cifs_sb_info
* cifs_sb
, ino_t
*pinum
)
609 unsigned int len
= 0;
611 struct nls_table
* nlt
= cifs_sb
->local_nls
;
615 if(level
== SMB_FIND_FILE_UNIX
) {
616 FILE_UNIX_INFO
* pFindData
= (FILE_UNIX_INFO
*)current_entry
;
618 filename
= &pFindData
->FileName
[0];
620 len
= cifs_unicode_bytelen(filename
);
622 /* BB should we make this strnlen of PATH_MAX? */
623 len
= strnlen(filename
, PATH_MAX
);
626 /* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */
627 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)
628 *pinum
= pFindData
->UniqueId
;
629 } else if(level
== SMB_FIND_FILE_DIRECTORY_INFO
) {
630 FILE_DIRECTORY_INFO
* pFindData
=
631 (FILE_DIRECTORY_INFO
*)current_entry
;
632 filename
= &pFindData
->FileName
[0];
633 len
= le32_to_cpu(pFindData
->FileNameLength
);
634 } else if(level
== SMB_FIND_FILE_FULL_DIRECTORY_INFO
) {
635 FILE_FULL_DIRECTORY_INFO
* pFindData
=
636 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
637 filename
= &pFindData
->FileName
[0];
638 len
= le32_to_cpu(pFindData
->FileNameLength
);
639 } else if(level
== SMB_FIND_FILE_ID_FULL_DIR_INFO
) {
640 SEARCH_ID_FULL_DIR_INFO
* pFindData
=
641 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
642 filename
= &pFindData
->FileName
[0];
643 len
= le32_to_cpu(pFindData
->FileNameLength
);
644 *pinum
= pFindData
->UniqueId
;
645 } else if(level
== SMB_FIND_FILE_BOTH_DIRECTORY_INFO
) {
646 FILE_BOTH_DIRECTORY_INFO
* pFindData
=
647 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
648 filename
= &pFindData
->FileName
[0];
649 len
= le32_to_cpu(pFindData
->FileNameLength
);
651 cFYI(1,("Unknown findfirst level %d",level
));
655 /* BB fixme - test with long names */
656 /* Note converted filename can be longer than in unicode */
657 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
)
658 pqst
->len
= cifs_convertUCSpath((char *)pqst
->name
,
659 (__le16
*)filename
, len
/2, nlt
);
661 pqst
->len
= cifs_strfromUCS_le((char *)pqst
->name
,
662 (wchar_t *)filename
,len
/2,nlt
);
664 pqst
->name
= filename
;
667 pqst
->hash
= full_name_hash(pqst
->name
,pqst
->len
);
668 /* cFYI(1,("filldir on %s",pqst->name)); */
672 static int cifs_filldir(char *pfindEntry
, struct file
*file
,
673 filldir_t filldir
, void *direntry
, char *scratch_buf
)
677 struct cifsFileInfo
* pCifsF
;
680 struct cifs_sb_info
* cifs_sb
;
681 struct inode
*tmp_inode
;
682 struct dentry
*tmp_dentry
;
684 /* get filename and len into qstring */
686 /* decide whether to create and populate ionde */
687 if((direntry
== NULL
) || (file
== NULL
))
690 pCifsF
= file
->private_data
;
692 if((scratch_buf
== NULL
) || (pfindEntry
== NULL
) || (pCifsF
== NULL
))
695 if(file
->f_dentry
== NULL
)
698 cifs_sb
= CIFS_SB(file
->f_dentry
->d_sb
);
700 qstring
.name
= scratch_buf
;
701 rc
= cifs_get_name_from_search_buf(&qstring
,pfindEntry
,
702 pCifsF
->srch_inf
.info_level
,
703 pCifsF
->srch_inf
.unicode
,cifs_sb
,
704 &inum
/* returned */);
709 rc
= construct_dentry(&qstring
,file
,&tmp_inode
, &tmp_dentry
);
710 if((tmp_inode
== NULL
) || (tmp_dentry
== NULL
))
714 /* inode created, we need to hash it with right inode number */
716 /* BB fixme - hash the 2 32 quantities bits together if necessary BB */
717 tmp_inode
->i_ino
= inum
;
719 insert_inode_hash(tmp_inode
);
722 /* we pass in rc below, indicating whether it is a new inode,
723 so we can figure out whether to invalidate the inode cached
724 data if the file has changed */
725 if(pCifsF
->srch_inf
.info_level
== SMB_FIND_FILE_UNIX
) {
726 unix_fill_in_inode(tmp_inode
,
727 (FILE_UNIX_INFO
*)pfindEntry
,&obj_type
, rc
);
729 fill_in_inode(tmp_inode
,
730 (FILE_DIRECTORY_INFO
*)pfindEntry
,&obj_type
, rc
);
733 rc
= filldir(direntry
,qstring
.name
,qstring
.len
,file
->f_pos
,
734 tmp_inode
->i_ino
,obj_type
);
736 cFYI(1,("filldir rc = %d",rc
));
743 static int cifs_save_resume_key(const char *current_entry
,
744 struct cifsFileInfo
*cifsFile
)
747 unsigned int len
= 0;
751 if((cifsFile
== NULL
) || (current_entry
== NULL
))
754 level
= cifsFile
->srch_inf
.info_level
;
756 if(level
== SMB_FIND_FILE_UNIX
) {
757 FILE_UNIX_INFO
* pFindData
= (FILE_UNIX_INFO
*)current_entry
;
759 filename
= &pFindData
->FileName
[0];
760 if(cifsFile
->srch_inf
.unicode
) {
761 len
= cifs_unicode_bytelen(filename
);
763 /* BB should we make this strnlen of PATH_MAX? */
764 len
= strnlen(filename
, PATH_MAX
);
766 cifsFile
->srch_inf
.resume_key
= pFindData
->ResumeKey
;
767 } else if(level
== SMB_FIND_FILE_DIRECTORY_INFO
) {
768 FILE_DIRECTORY_INFO
* pFindData
=
769 (FILE_DIRECTORY_INFO
*)current_entry
;
770 filename
= &pFindData
->FileName
[0];
771 len
= le32_to_cpu(pFindData
->FileNameLength
);
772 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
773 } else if(level
== SMB_FIND_FILE_FULL_DIRECTORY_INFO
) {
774 FILE_FULL_DIRECTORY_INFO
* pFindData
=
775 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
776 filename
= &pFindData
->FileName
[0];
777 len
= le32_to_cpu(pFindData
->FileNameLength
);
778 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
779 } else if(level
== SMB_FIND_FILE_ID_FULL_DIR_INFO
) {
780 SEARCH_ID_FULL_DIR_INFO
* pFindData
=
781 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
782 filename
= &pFindData
->FileName
[0];
783 len
= le32_to_cpu(pFindData
->FileNameLength
);
784 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
785 } else if(level
== SMB_FIND_FILE_BOTH_DIRECTORY_INFO
) {
786 FILE_BOTH_DIRECTORY_INFO
* pFindData
=
787 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
788 filename
= &pFindData
->FileName
[0];
789 len
= le32_to_cpu(pFindData
->FileNameLength
);
790 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
792 cFYI(1,("Unknown findfirst level %d",level
));
795 cifsFile
->srch_inf
.resume_name_len
= len
;
796 cifsFile
->srch_inf
.presume_name
= filename
;
800 int cifs_readdir(struct file
*file
, void *direntry
, filldir_t filldir
)
804 struct cifs_sb_info
*cifs_sb
;
805 struct cifsTconInfo
*pTcon
;
806 struct cifsFileInfo
*cifsFile
= NULL
;
807 char * current_entry
;
809 char * tmp_buf
= NULL
;
814 if(file
->f_dentry
== NULL
) {
818 /* dump_cifs_file_struct(file, "Begin rdir "); */
820 cifs_sb
= CIFS_SB(file
->f_dentry
->d_sb
);
821 pTcon
= cifs_sb
->tcon
;
825 /* cFYI(1,("readdir2 pos: %lld",file->f_pos)); */
827 switch ((int) file
->f_pos
) {
829 /*if (filldir(direntry, ".", 1, file->f_pos,
830 file->f_dentry->d_inode->i_ino, DT_DIR) < 0) {
831 cERROR(1, ("Filldir for current dir failed "));
837 /* if (filldir(direntry, "..", 2, file->f_pos,
838 file->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
839 cERROR(1, ("Filldir for parent dir failed "));
845 /* 1) If search is active,
846 is in current search buffer?
847 if it before then restart search
848 if after then keep searching till find it */
850 if(file
->private_data
== NULL
) {
851 rc
= initiate_cifs_search(xid
,file
);
852 cFYI(1,("initiate cifs search rc %d",rc
));
859 if(file
->private_data
== NULL
) {
864 cifsFile
= file
->private_data
;
865 if (cifsFile
->srch_inf
.endOfSearch
) {
866 if(cifsFile
->srch_inf
.emptyDir
) {
867 cFYI(1, ("End of search, empty dir"));
872 cifsFile->invalidHandle = TRUE;
873 CIFSFindClose(xid, pTcon, cifsFile->netfid);
875 kfree(cifsFile->search_resume_name);
876 cifsFile->search_resume_name = NULL; */
878 /* BB account for . and .. in f_pos as special case */
879 /* dump_cifs_file_struct(file, "rdir after default ");*/
881 rc
= find_cifs_entry(xid
,pTcon
, file
,
882 ¤t_entry
,&num_to_fill
);
884 cFYI(1,("fce error %d",rc
));
886 } else if (current_entry
!= NULL
) {
887 cFYI(1,("entry %lld found",file
->f_pos
));
889 cFYI(1,("could not find entry"));
892 cFYI(1,("loop through %d times filling dir for net buf %p",
893 num_to_fill
,cifsFile
->srch_inf
.ntwrk_buf_start
));
894 end_of_smb
= cifsFile
->srch_inf
.ntwrk_buf_start
+
895 smbCalcSize((struct smb_hdr
*)
896 cifsFile
->srch_inf
.ntwrk_buf_start
);
897 /* To be safe - for UCS to UTF-8 with strings loaded
898 with the rare long characters alloc more to account for
899 such multibyte target UTF-8 characters. cifs_unicode.c,
900 which actually does the conversion, has the same limit */
901 tmp_buf
= kmalloc((2 * NAME_MAX
) + 4, GFP_KERNEL
);
902 for(i
=0;(i
<num_to_fill
) && (rc
== 0);i
++) {
903 if(current_entry
== NULL
) {
904 /* evaluate whether this case is an error */
905 cERROR(1,("past end of SMB num to fill %d i %d",
910 rc
= cifs_filldir(current_entry
, file
,
911 filldir
, direntry
,tmp_buf
);
913 if(file
->f_pos
== cifsFile
->srch_inf
.index_of_last_entry
) {
914 cFYI(1,("last entry in buf at pos %lld %s",
915 file
->f_pos
,tmp_buf
)); /* BB removeme BB */
916 cifs_save_resume_key(current_entry
,cifsFile
);
919 current_entry
= nxt_dir_entry(current_entry
,
927 /* dump_cifs_file_struct(file, "end rdir "); */