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
);
95 tmp_dentry
->d_op
= &cifs_ci_dentry_ops
;
97 tmp_dentry
->d_op
= &cifs_dentry_ops
;
98 if(*ptmp_inode
== NULL
)
101 d_instantiate(tmp_dentry
, *ptmp_inode
);
102 d_rehash(tmp_dentry
);
105 tmp_dentry
->d_time
= jiffies
;
106 *pnew_dentry
= tmp_dentry
;
110 static void fill_in_inode(struct inode
*tmp_inode
,
111 FILE_DIRECTORY_INFO
*pfindData
, int *pobject_type
, int isNewInode
)
114 struct timespec local_mtime
;
116 struct cifsInodeInfo
*cifsInfo
= CIFS_I(tmp_inode
);
117 struct cifs_sb_info
*cifs_sb
= CIFS_SB(tmp_inode
->i_sb
);
118 __u32 attr
= le32_to_cpu(pfindData
->ExtFileAttributes
);
119 __u64 allocation_size
= le64_to_cpu(pfindData
->AllocationSize
);
120 __u64 end_of_file
= le64_to_cpu(pfindData
->EndOfFile
);
122 cifsInfo
->cifsAttrs
= attr
;
123 cifsInfo
->time
= jiffies
;
125 /* save mtime and size */
126 local_mtime
= tmp_inode
->i_mtime
;
127 local_size
= tmp_inode
->i_size
;
129 /* Linux can not store file creation time unfortunately so ignore it */
131 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastAccessTime
));
133 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastWriteTime
));
135 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->ChangeTime
));
136 /* treat dos attribute of read-only as read-only mode bit e.g. 555? */
137 /* 2767 perms - indicate mandatory locking */
138 /* BB fill in uid and gid here? with help from winbind?
139 or retrieve from NTFS stream extended attribute */
140 if (atomic_read(&cifsInfo
->inUse
) == 0) {
141 tmp_inode
->i_uid
= cifs_sb
->mnt_uid
;
142 tmp_inode
->i_gid
= cifs_sb
->mnt_gid
;
143 /* set default mode. will override for dirs below */
144 tmp_inode
->i_mode
= cifs_sb
->mnt_file_mode
;
146 /* mask off the type bits since it gets set
147 below and we do not want to get two type
149 tmp_inode
->i_mode
&= ~S_IFMT
;
152 if (attr
& ATTR_DIRECTORY
) {
153 *pobject_type
= DT_DIR
;
154 /* override default perms since we do not lock dirs */
155 if(atomic_read(&cifsInfo
->inUse
) == 0) {
156 tmp_inode
->i_mode
= cifs_sb
->mnt_dir_mode
;
158 tmp_inode
->i_mode
|= S_IFDIR
;
159 } else if ((cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UNX_EMUL
) &&
160 (attr
& ATTR_SYSTEM
)) {
161 if (end_of_file
== 0) {
162 *pobject_type
= DT_FIFO
;
163 tmp_inode
->i_mode
|= S_IFIFO
;
165 /* rather than get the type here, we mark the
166 inode as needing revalidate and get the real type
167 (blk vs chr vs. symlink) later ie in lookup */
168 *pobject_type
= DT_REG
;
169 tmp_inode
->i_mode
|= S_IFREG
;
172 /* we no longer mark these because we could not follow them */
173 /* } else if (attr & ATTR_REPARSE) {
174 *pobject_type = DT_LNK;
175 tmp_inode->i_mode |= S_IFLNK; */
177 *pobject_type
= DT_REG
;
178 tmp_inode
->i_mode
|= S_IFREG
;
179 if (attr
& ATTR_READONLY
)
180 tmp_inode
->i_mode
&= ~(S_IWUGO
);
181 } /* could add code here - to validate if device or weird share type? */
183 /* can not fill in nlink here as in qpathinfo version and Unx search */
184 if (atomic_read(&cifsInfo
->inUse
) == 0) {
185 atomic_set(&cifsInfo
->inUse
, 1);
188 if (is_size_safe_to_change(cifsInfo
)) {
189 /* can not safely change the file size here if the
190 client is writing to it due to potential races */
191 i_size_write(tmp_inode
, end_of_file
);
193 /* 512 bytes (2**9) is the fake blocksize that must be used */
194 /* for this calculation, even though the reported blocksize is larger */
195 tmp_inode
->i_blocks
= (512 - 1 + allocation_size
) >> 9;
198 if (allocation_size
< end_of_file
)
199 cFYI(1, ("May be sparse file, allocation less than file size"));
201 ("File Size %ld and blocks %ld and blocksize %ld",
202 (unsigned long)tmp_inode
->i_size
, tmp_inode
->i_blocks
,
203 tmp_inode
->i_blksize
));
204 if (S_ISREG(tmp_inode
->i_mode
)) {
205 cFYI(1, ("File inode"));
206 tmp_inode
->i_op
= &cifs_file_inode_ops
;
207 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
) {
208 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
209 tmp_inode
->i_fop
= &cifs_file_direct_nobrl_ops
;
211 tmp_inode
->i_fop
= &cifs_file_direct_ops
;
213 } else if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
214 tmp_inode
->i_fop
= &cifs_file_nobrl_ops
;
216 tmp_inode
->i_fop
= &cifs_file_ops
;
218 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops
;
219 if((cifs_sb
->tcon
) && (cifs_sb
->tcon
->ses
) &&
220 (cifs_sb
->tcon
->ses
->server
->maxBuf
<
221 4096 + MAX_CIFS_HDR_SIZE
))
222 tmp_inode
->i_data
.a_ops
->readpages
= NULL
;
224 return; /* No sense invalidating pages for new inode
225 since have not started caching readahead file
228 if (timespec_equal(&tmp_inode
->i_mtime
, &local_mtime
) &&
229 (local_size
== tmp_inode
->i_size
)) {
230 cFYI(1, ("inode exists but unchanged"));
232 /* file may have changed on server */
233 cFYI(1, ("invalidate inode, readdir detected change"));
234 invalidate_remote_inode(tmp_inode
);
236 } else if (S_ISDIR(tmp_inode
->i_mode
)) {
237 cFYI(1, ("Directory inode"));
238 tmp_inode
->i_op
= &cifs_dir_inode_ops
;
239 tmp_inode
->i_fop
= &cifs_dir_ops
;
240 } else if (S_ISLNK(tmp_inode
->i_mode
)) {
241 cFYI(1, ("Symbolic Link inode"));
242 tmp_inode
->i_op
= &cifs_symlink_inode_ops
;
244 cFYI(1, ("Init special inode"));
245 init_special_inode(tmp_inode
, tmp_inode
->i_mode
,
250 static void unix_fill_in_inode(struct inode
*tmp_inode
,
251 FILE_UNIX_INFO
*pfindData
, int *pobject_type
, int isNewInode
)
254 struct timespec local_mtime
;
256 struct cifsInodeInfo
*cifsInfo
= CIFS_I(tmp_inode
);
257 struct cifs_sb_info
*cifs_sb
= CIFS_SB(tmp_inode
->i_sb
);
259 __u32 type
= le32_to_cpu(pfindData
->Type
);
260 __u64 num_of_bytes
= le64_to_cpu(pfindData
->NumOfBytes
);
261 __u64 end_of_file
= le64_to_cpu(pfindData
->EndOfFile
);
262 cifsInfo
->time
= jiffies
;
263 atomic_inc(&cifsInfo
->inUse
);
265 /* save mtime and size */
266 local_mtime
= tmp_inode
->i_mtime
;
267 local_size
= tmp_inode
->i_size
;
270 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastAccessTime
));
272 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastModificationTime
));
274 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastStatusChange
));
276 tmp_inode
->i_mode
= le64_to_cpu(pfindData
->Permissions
);
277 /* since we set the inode type below we need to mask off type
278 to avoid strange results if bits above were corrupt */
279 tmp_inode
->i_mode
&= ~S_IFMT
;
280 if (type
== UNIX_FILE
) {
281 *pobject_type
= DT_REG
;
282 tmp_inode
->i_mode
|= S_IFREG
;
283 } else if (type
== UNIX_SYMLINK
) {
284 *pobject_type
= DT_LNK
;
285 tmp_inode
->i_mode
|= S_IFLNK
;
286 } else if (type
== UNIX_DIR
) {
287 *pobject_type
= DT_DIR
;
288 tmp_inode
->i_mode
|= S_IFDIR
;
289 } else if (type
== UNIX_CHARDEV
) {
290 *pobject_type
= DT_CHR
;
291 tmp_inode
->i_mode
|= S_IFCHR
;
292 tmp_inode
->i_rdev
= MKDEV(le64_to_cpu(pfindData
->DevMajor
),
293 le64_to_cpu(pfindData
->DevMinor
) & MINORMASK
);
294 } else if (type
== UNIX_BLOCKDEV
) {
295 *pobject_type
= DT_BLK
;
296 tmp_inode
->i_mode
|= S_IFBLK
;
297 tmp_inode
->i_rdev
= MKDEV(le64_to_cpu(pfindData
->DevMajor
),
298 le64_to_cpu(pfindData
->DevMinor
) & MINORMASK
);
299 } else if (type
== UNIX_FIFO
) {
300 *pobject_type
= DT_FIFO
;
301 tmp_inode
->i_mode
|= S_IFIFO
;
302 } else if (type
== UNIX_SOCKET
) {
303 *pobject_type
= DT_SOCK
;
304 tmp_inode
->i_mode
|= S_IFSOCK
;
306 /* safest to just call it a file */
307 *pobject_type
= DT_REG
;
308 tmp_inode
->i_mode
|= S_IFREG
;
309 cFYI(1,("unknown inode type %d",type
));
312 tmp_inode
->i_uid
= le64_to_cpu(pfindData
->Uid
);
313 tmp_inode
->i_gid
= le64_to_cpu(pfindData
->Gid
);
314 tmp_inode
->i_nlink
= le64_to_cpu(pfindData
->Nlinks
);
316 if (is_size_safe_to_change(cifsInfo
)) {
317 /* can not safely change the file size here if the
318 client is writing to it due to potential races */
319 i_size_write(tmp_inode
,end_of_file
);
321 /* 512 bytes (2**9) is the fake blocksize that must be used */
322 /* for this calculation, not the real blocksize */
323 tmp_inode
->i_blocks
= (512 - 1 + num_of_bytes
) >> 9;
326 if (S_ISREG(tmp_inode
->i_mode
)) {
327 cFYI(1, ("File inode"));
328 tmp_inode
->i_op
= &cifs_file_inode_ops
;
330 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
) {
331 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
332 tmp_inode
->i_fop
= &cifs_file_direct_nobrl_ops
;
334 tmp_inode
->i_fop
= &cifs_file_direct_ops
;
336 } else if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
337 tmp_inode
->i_fop
= &cifs_file_nobrl_ops
;
339 tmp_inode
->i_fop
= &cifs_file_ops
;
341 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops
;
342 if((cifs_sb
->tcon
) && (cifs_sb
->tcon
->ses
) &&
343 (cifs_sb
->tcon
->ses
->server
->maxBuf
<
344 4096 + MAX_CIFS_HDR_SIZE
))
345 tmp_inode
->i_data
.a_ops
->readpages
= NULL
;
348 return; /* No sense invalidating pages for new inode since we
349 have not started caching readahead file data yet */
351 if (timespec_equal(&tmp_inode
->i_mtime
, &local_mtime
) &&
352 (local_size
== tmp_inode
->i_size
)) {
353 cFYI(1, ("inode exists but unchanged"));
355 /* file may have changed on server */
356 cFYI(1, ("invalidate inode, readdir detected change"));
357 invalidate_remote_inode(tmp_inode
);
359 } else if (S_ISDIR(tmp_inode
->i_mode
)) {
360 cFYI(1, ("Directory inode"));
361 tmp_inode
->i_op
= &cifs_dir_inode_ops
;
362 tmp_inode
->i_fop
= &cifs_dir_ops
;
363 } else if (S_ISLNK(tmp_inode
->i_mode
)) {
364 cFYI(1, ("Symbolic Link inode"));
365 tmp_inode
->i_op
= &cifs_symlink_inode_ops
;
366 /* tmp_inode->i_fop = *//* do not need to set to anything */
368 cFYI(1, ("Special inode"));
369 init_special_inode(tmp_inode
, tmp_inode
->i_mode
,
374 static int initiate_cifs_search(const int xid
, struct file
*file
)
378 struct cifsFileInfo
* cifsFile
;
379 struct cifs_sb_info
*cifs_sb
;
380 struct cifsTconInfo
*pTcon
;
382 if(file
->private_data
== NULL
) {
384 kmalloc(sizeof(struct cifsFileInfo
),GFP_KERNEL
);
387 if(file
->private_data
== NULL
) {
390 memset(file
->private_data
,0,sizeof(struct cifsFileInfo
));
392 cifsFile
= file
->private_data
;
393 cifsFile
->invalidHandle
= TRUE
;
394 cifsFile
->srch_inf
.endOfSearch
= FALSE
;
396 if(file
->f_dentry
== NULL
)
399 cifs_sb
= CIFS_SB(file
->f_dentry
->d_sb
);
403 pTcon
= cifs_sb
->tcon
;
407 down(&file
->f_dentry
->d_sb
->s_vfs_rename_sem
);
408 full_path
= build_path_from_dentry(file
->f_dentry
);
409 up(&file
->f_dentry
->d_sb
->s_vfs_rename_sem
);
411 if(full_path
== NULL
) {
415 cFYI(1, ("Full path: %s start at: %lld", full_path
, file
->f_pos
));
418 /* test for Unix extensions */
419 if (pTcon
->ses
->capabilities
& CAP_UNIX
) {
420 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_UNIX
;
421 } else if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) {
422 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_ID_FULL_DIR_INFO
;
423 } else /* not srvinos - BB fixme add check for backlevel? */ {
424 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_DIRECTORY_INFO
;
427 rc
= CIFSFindFirst(xid
, pTcon
,full_path
,cifs_sb
->local_nls
,
428 &cifsFile
->netfid
, &cifsFile
->srch_inf
,
429 cifs_sb
->mnt_cifs_flags
&
430 CIFS_MOUNT_MAP_SPECIAL_CHR
, CIFS_DIR_SEP(cifs_sb
));
432 cifsFile
->invalidHandle
= FALSE
;
433 if((rc
== -EOPNOTSUPP
) &&
434 (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)) {
435 cifs_sb
->mnt_cifs_flags
&= ~CIFS_MOUNT_SERVER_INUM
;
442 /* return length of unicode string in bytes */
443 static int cifs_unicode_bytelen(char *str
)
446 __le16
* ustr
= (__le16
*)str
;
448 for(len
=0;len
<= PATH_MAX
;len
++) {
452 cFYI(1,("Unicode string longer than PATH_MAX found"));
456 static char *nxt_dir_entry(char *old_entry
, char *end_of_smb
)
459 FILE_DIRECTORY_INFO
* pDirInfo
= (FILE_DIRECTORY_INFO
*)old_entry
;
461 new_entry
= old_entry
+ le32_to_cpu(pDirInfo
->NextEntryOffset
);
462 cFYI(1,("new entry %p old entry %p",new_entry
,old_entry
));
463 /* validate that new_entry is not past end of SMB */
464 if(new_entry
>= end_of_smb
) {
466 ("search entry %p began after end of SMB %p old entry %p",
467 new_entry
, end_of_smb
, old_entry
));
469 } else if (new_entry
+ sizeof(FILE_DIRECTORY_INFO
) > end_of_smb
) {
470 cERROR(1,("search entry %p extends after end of SMB %p",
471 new_entry
, end_of_smb
));
478 #define UNICODE_DOT cpu_to_le16(0x2e)
480 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
481 static int cifs_entry_is_dot(char *current_entry
, struct cifsFileInfo
*cfile
)
484 char * filename
= NULL
;
487 if(cfile
->srch_inf
.info_level
== 0x202) {
488 FILE_UNIX_INFO
* pFindData
= (FILE_UNIX_INFO
*)current_entry
;
489 filename
= &pFindData
->FileName
[0];
490 if(cfile
->srch_inf
.unicode
) {
491 len
= cifs_unicode_bytelen(filename
);
493 /* BB should we make this strnlen of PATH_MAX? */
494 len
= strnlen(filename
, 5);
496 } else if(cfile
->srch_inf
.info_level
== 0x101) {
497 FILE_DIRECTORY_INFO
* pFindData
=
498 (FILE_DIRECTORY_INFO
*)current_entry
;
499 filename
= &pFindData
->FileName
[0];
500 len
= le32_to_cpu(pFindData
->FileNameLength
);
501 } else if(cfile
->srch_inf
.info_level
== 0x102) {
502 FILE_FULL_DIRECTORY_INFO
* pFindData
=
503 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
504 filename
= &pFindData
->FileName
[0];
505 len
= le32_to_cpu(pFindData
->FileNameLength
);
506 } else if(cfile
->srch_inf
.info_level
== 0x105) {
507 SEARCH_ID_FULL_DIR_INFO
* pFindData
=
508 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
509 filename
= &pFindData
->FileName
[0];
510 len
= le32_to_cpu(pFindData
->FileNameLength
);
511 } else if(cfile
->srch_inf
.info_level
== 0x104) {
512 FILE_BOTH_DIRECTORY_INFO
* pFindData
=
513 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
514 filename
= &pFindData
->FileName
[0];
515 len
= le32_to_cpu(pFindData
->FileNameLength
);
517 cFYI(1,("Unknown findfirst level %d",cfile
->srch_inf
.info_level
));
521 if(cfile
->srch_inf
.unicode
) {
522 __le16
*ufilename
= (__le16
*)filename
;
525 if(ufilename
[0] == UNICODE_DOT
)
527 } else if(len
== 4) {
529 if((ufilename
[0] == UNICODE_DOT
)
530 &&(ufilename
[1] == UNICODE_DOT
))
535 if(filename
[0] == '.')
537 } else if(len
== 2) {
538 if((filename
[0] == '.') && (filename
[1] == '.'))
547 /* Check if directory that we are searching has changed so we can decide
548 whether we can use the cached search results from the previous search */
549 static int is_dir_changed(struct file
* file
)
551 struct inode
* inode
;
552 struct cifsInodeInfo
*cifsInfo
;
554 if(file
->f_dentry
== NULL
)
557 inode
= file
->f_dentry
->d_inode
;
562 cifsInfo
= CIFS_I(inode
);
564 if(cifsInfo
->time
== 0)
565 return 1; /* directory was changed, perhaps due to unlink */
571 /* find the corresponding entry in the search */
572 /* Note that the SMB server returns search entries for . and .. which
573 complicates logic here if we choose to parse for them and we do not
574 assume that they are located in the findfirst return buffer.*/
575 /* We start counting in the buffer with entry 2 and increment for every
576 entry (do not increment for . or .. entry) */
577 static int find_cifs_entry(const int xid
, struct cifsTconInfo
*pTcon
,
578 struct file
*file
, char **ppCurrentEntry
, int *num_to_ret
)
582 loff_t first_entry_in_buffer
;
583 loff_t index_to_find
= file
->f_pos
;
584 struct cifsFileInfo
* cifsFile
= file
->private_data
;
585 /* check if index in the buffer */
587 if((cifsFile
== NULL
) || (ppCurrentEntry
== NULL
) ||
588 (num_to_ret
== NULL
))
591 *ppCurrentEntry
= NULL
;
592 first_entry_in_buffer
=
593 cifsFile
->srch_inf
.index_of_last_entry
-
594 cifsFile
->srch_inf
.entries_in_buffer
;
595 /* dump_cifs_file_struct(file, "In fce ");*/
596 if(((index_to_find
< cifsFile
->srch_inf
.index_of_last_entry
) &&
597 is_dir_changed(file
)) ||
598 (index_to_find
< first_entry_in_buffer
)) {
599 /* close and restart search */
600 cFYI(1,("search backing up - close and restart search"));
601 cifsFile
->invalidHandle
= TRUE
;
602 CIFSFindClose(xid
, pTcon
, cifsFile
->netfid
);
603 kfree(cifsFile
->search_resume_name
);
604 cifsFile
->search_resume_name
= NULL
;
605 if(cifsFile
->srch_inf
.ntwrk_buf_start
) {
606 cFYI(1,("freeing SMB ff cache buf on search rewind"));
607 if(cifsFile
->srch_inf
.smallBuf
)
608 cifs_small_buf_release(cifsFile
->srch_inf
.
611 cifs_buf_release(cifsFile
->srch_inf
.
614 rc
= initiate_cifs_search(xid
,file
);
616 cFYI(1,("error %d reinitiating a search on rewind",rc
));
621 while((index_to_find
>= cifsFile
->srch_inf
.index_of_last_entry
) &&
622 (rc
== 0) && (cifsFile
->srch_inf
.endOfSearch
== FALSE
)){
623 cFYI(1,("calling findnext2"));
624 rc
= CIFSFindNext(xid
,pTcon
,cifsFile
->netfid
,
625 &cifsFile
->srch_inf
);
629 if(index_to_find
< cifsFile
->srch_inf
.index_of_last_entry
) {
630 /* we found the buffer that contains the entry */
631 /* scan and find it */
633 char * current_entry
;
634 char * end_of_smb
= cifsFile
->srch_inf
.ntwrk_buf_start
+
635 smbCalcSize((struct smb_hdr
*)
636 cifsFile
->srch_inf
.ntwrk_buf_start
);
637 first_entry_in_buffer
= cifsFile
->srch_inf
.index_of_last_entry
638 - cifsFile
->srch_inf
.entries_in_buffer
;
639 pos_in_buf
= index_to_find
- first_entry_in_buffer
;
640 cFYI(1,("found entry - pos_in_buf %d",pos_in_buf
));
641 current_entry
= cifsFile
->srch_inf
.srch_entries_start
;
642 for(i
=0;(i
<(pos_in_buf
)) && (current_entry
!= NULL
);i
++) {
643 /* go entry by entry figuring out which is first */
646 rc
= cifs_entry_is_dot(current_entry
,cifsFile
);
647 if(rc
== 1) /* is . or .. so skip */ {
648 cFYI(1,("Entry is .")); /* BB removeme BB */
650 } else if (rc
== 2 ) {
651 cFYI(1,("Entry is ..")); /* BB removeme BB */
654 current_entry
= nxt_dir_entry(current_entry
,end_of_smb
);
656 if((current_entry
== NULL
) && (i
< pos_in_buf
)) {
657 /* BB fixme - check if we should flag this error */
658 cERROR(1,("reached end of buf searching for pos in buf"
659 " %d index to find %lld rc %d",
660 pos_in_buf
,index_to_find
,rc
));
663 *ppCurrentEntry
= current_entry
;
665 cFYI(1,("index not in buffer - could not findnext into it"));
669 if(pos_in_buf
>= cifsFile
->srch_inf
.entries_in_buffer
) {
670 cFYI(1,("can not return entries pos_in_buf beyond last entry"));
673 *num_to_ret
= cifsFile
->srch_inf
.entries_in_buffer
- pos_in_buf
;
678 /* inode num, inode type and filename returned */
679 static int cifs_get_name_from_search_buf(struct qstr
*pqst
,
680 char *current_entry
, __u16 level
, unsigned int unicode
,
681 struct cifs_sb_info
* cifs_sb
, ino_t
*pinum
)
684 unsigned int len
= 0;
686 struct nls_table
* nlt
= cifs_sb
->local_nls
;
690 if(level
== SMB_FIND_FILE_UNIX
) {
691 FILE_UNIX_INFO
* pFindData
= (FILE_UNIX_INFO
*)current_entry
;
693 filename
= &pFindData
->FileName
[0];
695 len
= cifs_unicode_bytelen(filename
);
697 /* BB should we make this strnlen of PATH_MAX? */
698 len
= strnlen(filename
, PATH_MAX
);
701 /* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */
702 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)
703 *pinum
= pFindData
->UniqueId
;
704 } else if(level
== SMB_FIND_FILE_DIRECTORY_INFO
) {
705 FILE_DIRECTORY_INFO
* pFindData
=
706 (FILE_DIRECTORY_INFO
*)current_entry
;
707 filename
= &pFindData
->FileName
[0];
708 len
= le32_to_cpu(pFindData
->FileNameLength
);
709 } else if(level
== SMB_FIND_FILE_FULL_DIRECTORY_INFO
) {
710 FILE_FULL_DIRECTORY_INFO
* pFindData
=
711 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
712 filename
= &pFindData
->FileName
[0];
713 len
= le32_to_cpu(pFindData
->FileNameLength
);
714 } else if(level
== SMB_FIND_FILE_ID_FULL_DIR_INFO
) {
715 SEARCH_ID_FULL_DIR_INFO
* pFindData
=
716 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
717 filename
= &pFindData
->FileName
[0];
718 len
= le32_to_cpu(pFindData
->FileNameLength
);
719 *pinum
= pFindData
->UniqueId
;
720 } else if(level
== SMB_FIND_FILE_BOTH_DIRECTORY_INFO
) {
721 FILE_BOTH_DIRECTORY_INFO
* pFindData
=
722 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
723 filename
= &pFindData
->FileName
[0];
724 len
= le32_to_cpu(pFindData
->FileNameLength
);
726 cFYI(1,("Unknown findfirst level %d",level
));
730 /* BB fixme - test with long names */
731 /* Note converted filename can be longer than in unicode */
732 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
)
733 pqst
->len
= cifs_convertUCSpath((char *)pqst
->name
,
734 (__le16
*)filename
, len
/2, nlt
);
736 pqst
->len
= cifs_strfromUCS_le((char *)pqst
->name
,
737 (__le16
*)filename
,len
/2,nlt
);
739 pqst
->name
= filename
;
742 pqst
->hash
= full_name_hash(pqst
->name
,pqst
->len
);
743 /* cFYI(1,("filldir on %s",pqst->name)); */
747 static int cifs_filldir(char *pfindEntry
, struct file
*file
,
748 filldir_t filldir
, void *direntry
, char *scratch_buf
)
752 struct cifsFileInfo
* pCifsF
;
755 struct cifs_sb_info
* cifs_sb
;
756 struct inode
*tmp_inode
;
757 struct dentry
*tmp_dentry
;
759 /* get filename and len into qstring */
761 /* decide whether to create and populate ionde */
762 if((direntry
== NULL
) || (file
== NULL
))
765 pCifsF
= file
->private_data
;
767 if((scratch_buf
== NULL
) || (pfindEntry
== NULL
) || (pCifsF
== NULL
))
770 if(file
->f_dentry
== NULL
)
773 cifs_sb
= CIFS_SB(file
->f_dentry
->d_sb
);
775 qstring
.name
= scratch_buf
;
776 rc
= cifs_get_name_from_search_buf(&qstring
,pfindEntry
,
777 pCifsF
->srch_inf
.info_level
,
778 pCifsF
->srch_inf
.unicode
,cifs_sb
,
779 &inum
/* returned */);
784 rc
= construct_dentry(&qstring
,file
,&tmp_inode
, &tmp_dentry
);
785 if((tmp_inode
== NULL
) || (tmp_dentry
== NULL
))
789 /* inode created, we need to hash it with right inode number */
791 /* BB fixme - hash the 2 32 quantities bits together if necessary BB */
792 tmp_inode
->i_ino
= inum
;
794 insert_inode_hash(tmp_inode
);
797 /* we pass in rc below, indicating whether it is a new inode,
798 so we can figure out whether to invalidate the inode cached
799 data if the file has changed */
800 if(pCifsF
->srch_inf
.info_level
== SMB_FIND_FILE_UNIX
) {
801 unix_fill_in_inode(tmp_inode
,
802 (FILE_UNIX_INFO
*)pfindEntry
,&obj_type
, rc
);
804 fill_in_inode(tmp_inode
,
805 (FILE_DIRECTORY_INFO
*)pfindEntry
,&obj_type
, rc
);
808 rc
= filldir(direntry
,qstring
.name
,qstring
.len
,file
->f_pos
,
809 tmp_inode
->i_ino
,obj_type
);
811 cFYI(1,("filldir rc = %d",rc
));
818 static int cifs_save_resume_key(const char *current_entry
,
819 struct cifsFileInfo
*cifsFile
)
822 unsigned int len
= 0;
826 if((cifsFile
== NULL
) || (current_entry
== NULL
))
829 level
= cifsFile
->srch_inf
.info_level
;
831 if(level
== SMB_FIND_FILE_UNIX
) {
832 FILE_UNIX_INFO
* pFindData
= (FILE_UNIX_INFO
*)current_entry
;
834 filename
= &pFindData
->FileName
[0];
835 if(cifsFile
->srch_inf
.unicode
) {
836 len
= cifs_unicode_bytelen(filename
);
838 /* BB should we make this strnlen of PATH_MAX? */
839 len
= strnlen(filename
, PATH_MAX
);
841 cifsFile
->srch_inf
.resume_key
= pFindData
->ResumeKey
;
842 } else if(level
== SMB_FIND_FILE_DIRECTORY_INFO
) {
843 FILE_DIRECTORY_INFO
* pFindData
=
844 (FILE_DIRECTORY_INFO
*)current_entry
;
845 filename
= &pFindData
->FileName
[0];
846 len
= le32_to_cpu(pFindData
->FileNameLength
);
847 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
848 } else if(level
== SMB_FIND_FILE_FULL_DIRECTORY_INFO
) {
849 FILE_FULL_DIRECTORY_INFO
* pFindData
=
850 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
851 filename
= &pFindData
->FileName
[0];
852 len
= le32_to_cpu(pFindData
->FileNameLength
);
853 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
854 } else if(level
== SMB_FIND_FILE_ID_FULL_DIR_INFO
) {
855 SEARCH_ID_FULL_DIR_INFO
* pFindData
=
856 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
857 filename
= &pFindData
->FileName
[0];
858 len
= le32_to_cpu(pFindData
->FileNameLength
);
859 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
860 } else if(level
== SMB_FIND_FILE_BOTH_DIRECTORY_INFO
) {
861 FILE_BOTH_DIRECTORY_INFO
* pFindData
=
862 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
863 filename
= &pFindData
->FileName
[0];
864 len
= le32_to_cpu(pFindData
->FileNameLength
);
865 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
867 cFYI(1,("Unknown findfirst level %d",level
));
870 cifsFile
->srch_inf
.resume_name_len
= len
;
871 cifsFile
->srch_inf
.presume_name
= filename
;
875 int cifs_readdir(struct file
*file
, void *direntry
, filldir_t filldir
)
879 struct cifs_sb_info
*cifs_sb
;
880 struct cifsTconInfo
*pTcon
;
881 struct cifsFileInfo
*cifsFile
= NULL
;
882 char * current_entry
;
884 char * tmp_buf
= NULL
;
889 if(file
->f_dentry
== NULL
) {
894 cifs_sb
= CIFS_SB(file
->f_dentry
->d_sb
);
895 pTcon
= cifs_sb
->tcon
;
899 switch ((int) file
->f_pos
) {
901 /*if (filldir(direntry, ".", 1, file->f_pos,
902 file->f_dentry->d_inode->i_ino, DT_DIR) < 0) {
903 cERROR(1, ("Filldir for current dir failed "));
909 /* if (filldir(direntry, "..", 2, file->f_pos,
910 file->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
911 cERROR(1, ("Filldir for parent dir failed "));
917 /* 1) If search is active,
918 is in current search buffer?
919 if it before then restart search
920 if after then keep searching till find it */
922 if(file
->private_data
== NULL
) {
923 rc
= initiate_cifs_search(xid
,file
);
924 cFYI(1,("initiate cifs search rc %d",rc
));
931 if(file
->private_data
== NULL
) {
936 cifsFile
= file
->private_data
;
937 if (cifsFile
->srch_inf
.endOfSearch
) {
938 if(cifsFile
->srch_inf
.emptyDir
) {
939 cFYI(1, ("End of search, empty dir"));
944 cifsFile->invalidHandle = TRUE;
945 CIFSFindClose(xid, pTcon, cifsFile->netfid);
947 kfree(cifsFile->search_resume_name);
948 cifsFile->search_resume_name = NULL; */
950 /* BB account for . and .. in f_pos as special case */
952 rc
= find_cifs_entry(xid
,pTcon
, file
,
953 ¤t_entry
,&num_to_fill
);
955 cFYI(1,("fce error %d",rc
));
957 } else if (current_entry
!= NULL
) {
958 cFYI(1,("entry %lld found",file
->f_pos
));
960 cFYI(1,("could not find entry"));
963 cFYI(1,("loop through %d times filling dir for net buf %p",
964 num_to_fill
,cifsFile
->srch_inf
.ntwrk_buf_start
));
965 end_of_smb
= cifsFile
->srch_inf
.ntwrk_buf_start
+
966 smbCalcSize((struct smb_hdr
*)
967 cifsFile
->srch_inf
.ntwrk_buf_start
);
968 /* To be safe - for UCS to UTF-8 with strings loaded
969 with the rare long characters alloc more to account for
970 such multibyte target UTF-8 characters. cifs_unicode.c,
971 which actually does the conversion, has the same limit */
972 tmp_buf
= kmalloc((2 * NAME_MAX
) + 4, GFP_KERNEL
);
973 for(i
=0;(i
<num_to_fill
) && (rc
== 0);i
++) {
974 if(current_entry
== NULL
) {
975 /* evaluate whether this case is an error */
976 cERROR(1,("past end of SMB num to fill %d i %d",
981 rc
= cifs_filldir(current_entry
, file
,
982 filldir
, direntry
,tmp_buf
);
984 if(file
->f_pos
== cifsFile
->srch_inf
.index_of_last_entry
) {
985 cFYI(1,("last entry in buf at pos %lld %s",
986 file
->f_pos
,tmp_buf
)); /* BB removeme BB */
987 cifs_save_resume_key(current_entry
,cifsFile
);
990 current_entry
= nxt_dir_entry(current_entry
,