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[linux-2.6] / fs / cifs / readdir.c
1 /*
2  *   fs/cifs/readdir.c
3  *
4  *   Directory search handling
5  * 
6  *   Copyright (C) International Business Machines  Corp., 2004, 2007
7  *   Author(s): Steve French (sfrench@us.ibm.com)
8  *
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.
13  *
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.
18  *
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
22  */
23 #include <linux/fs.h>
24 #include <linux/pagemap.h>
25 #include <linux/stat.h>
26 #include "cifspdu.h"
27 #include "cifsglob.h"
28 #include "cifsproto.h"
29 #include "cifs_unicode.h"
30 #include "cifs_debug.h"
31 #include "cifs_fs_sb.h"
32 #include "cifsfs.h"
33
34 #ifdef CONFIG_CIFS_DEBUG2
35 static void dump_cifs_file_struct(struct file *file, char *label)
36 {
37         struct cifsFileInfo * cf;
38
39         if (file) {
40                 cf = file->private_data;
41                 if (cf == NULL) {
42                         cFYI(1,("empty cifs private file data"));
43                         return;
44                 }
45                 if (cf->invalidHandle) {
46                         cFYI(1,("invalid handle"));
47                 }
48                 if (cf->srch_inf.endOfSearch) {
49                         cFYI(1,("end of search"));
50                 }
51                 if (cf->srch_inf.emptyDir) {
52                         cFYI(1,("empty dir"));
53                 }
54                 
55         }
56 }
57 #endif /* DEBUG2 */
58
59 /* Returns one if new inode created (which therefore needs to be hashed) */
60 /* Might check in the future if inode number changed so we can rehash inode */
61 static int construct_dentry(struct qstr *qstring, struct file *file,
62         struct inode **ptmp_inode, struct dentry **pnew_dentry)
63 {
64         struct dentry *tmp_dentry;
65         struct cifs_sb_info *cifs_sb;
66         struct cifsTconInfo *pTcon;
67         int rc = 0;
68
69         cFYI(1, ("For %s", qstring->name));
70         cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
71         pTcon = cifs_sb->tcon;
72
73         qstring->hash = full_name_hash(qstring->name, qstring->len);
74         tmp_dentry = d_lookup(file->f_path.dentry, qstring);
75         if (tmp_dentry) {
76                 cFYI(0, ("existing dentry with inode 0x%p", tmp_dentry->d_inode));
77                 *ptmp_inode = tmp_dentry->d_inode;
78 /* BB overwrite old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len??*/
79                 if (*ptmp_inode == NULL) {
80                         *ptmp_inode = new_inode(file->f_path.dentry->d_sb);
81                         if (*ptmp_inode == NULL)
82                                 return rc;
83                         rc = 1;
84                 }
85                 if (file->f_path.dentry->d_sb->s_flags & MS_NOATIME)
86                         (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME;
87         } else {
88                 tmp_dentry = d_alloc(file->f_path.dentry, qstring);
89                 if (tmp_dentry == NULL) {
90                         cERROR(1,("Failed allocating dentry"));
91                         *ptmp_inode = NULL;
92                         return rc;
93                 }
94
95                 *ptmp_inode = new_inode(file->f_path.dentry->d_sb);
96                 if (pTcon->nocase)
97                         tmp_dentry->d_op = &cifs_ci_dentry_ops;
98                 else
99                         tmp_dentry->d_op = &cifs_dentry_ops;
100                 if (*ptmp_inode == NULL)
101                         return rc;
102                 if (file->f_path.dentry->d_sb->s_flags & MS_NOATIME)
103                         (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME;                       
104                 rc = 2;
105         }
106
107         tmp_dentry->d_time = jiffies;
108         *pnew_dentry = tmp_dentry;
109         return rc;
110 }
111
112 static void AdjustForTZ(struct cifsTconInfo * tcon, struct inode * inode)
113 {
114         if ((tcon) && (tcon->ses) && (tcon->ses->server)) {
115                 inode->i_ctime.tv_sec += tcon->ses->server->timeAdj;
116                 inode->i_mtime.tv_sec += tcon->ses->server->timeAdj;
117                 inode->i_atime.tv_sec += tcon->ses->server->timeAdj;
118         }
119         return;
120 }
121
122
123 static void fill_in_inode(struct inode *tmp_inode, int new_buf_type,
124                 char * buf, int *pobject_type, int isNewInode)
125 {
126         loff_t local_size;
127         struct timespec local_mtime;
128
129         struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
130         struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
131         __u32 attr;
132         __u64 allocation_size;
133         __u64 end_of_file;
134
135         /* save mtime and size */
136         local_mtime = tmp_inode->i_mtime;
137         local_size  = tmp_inode->i_size;
138
139         if (new_buf_type) {
140                 FILE_DIRECTORY_INFO *pfindData = (FILE_DIRECTORY_INFO *)buf;
141
142                 attr = le32_to_cpu(pfindData->ExtFileAttributes);
143                 allocation_size = le64_to_cpu(pfindData->AllocationSize);
144                 end_of_file = le64_to_cpu(pfindData->EndOfFile);
145                 tmp_inode->i_atime =
146                       cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
147                 tmp_inode->i_mtime =
148                       cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
149                 tmp_inode->i_ctime =
150                       cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
151         } else { /* legacy, OS2 and DOS style */
152 /*              struct timespec ts;*/
153                 FIND_FILE_STANDARD_INFO * pfindData = 
154                         (FIND_FILE_STANDARD_INFO *)buf;
155
156                 tmp_inode->i_mtime = cnvrtDosUnixTm(
157                                 le16_to_cpu(pfindData->LastWriteDate),
158                                 le16_to_cpu(pfindData->LastWriteTime));
159                 tmp_inode->i_atime = cnvrtDosUnixTm(
160                                 le16_to_cpu(pfindData->LastAccessDate),
161                                 le16_to_cpu(pfindData->LastAccessTime));
162                 tmp_inode->i_ctime = cnvrtDosUnixTm(
163                                 le16_to_cpu(pfindData->LastWriteDate),
164                                 le16_to_cpu(pfindData->LastWriteTime));
165                 AdjustForTZ(cifs_sb->tcon, tmp_inode);
166                 attr = le16_to_cpu(pfindData->Attributes);
167                 allocation_size = le32_to_cpu(pfindData->AllocationSize);
168                 end_of_file = le32_to_cpu(pfindData->DataSize);
169         }
170
171         /* Linux can not store file creation time unfortunately so ignore it */
172
173         cifsInfo->cifsAttrs = attr;
174         cifsInfo->time = jiffies;
175
176         /* treat dos attribute of read-only as read-only mode bit e.g. 555? */
177         /* 2767 perms - indicate mandatory locking */
178                 /* BB fill in uid and gid here? with help from winbind? 
179                    or retrieve from NTFS stream extended attribute */
180         if (atomic_read(&cifsInfo->inUse) == 0) {
181                 tmp_inode->i_uid = cifs_sb->mnt_uid;
182                 tmp_inode->i_gid = cifs_sb->mnt_gid;
183                 /* set default mode. will override for dirs below */
184                 tmp_inode->i_mode = cifs_sb->mnt_file_mode;
185         } else {
186                 /* mask off the type bits since it gets set
187                 below and we do not want to get two type
188                 bits set */
189                 tmp_inode->i_mode &= ~S_IFMT;
190         }
191
192         if (attr & ATTR_DIRECTORY) {
193                 *pobject_type = DT_DIR;
194                 /* override default perms since we do not lock dirs */
195                 if (atomic_read(&cifsInfo->inUse) == 0) {
196                         tmp_inode->i_mode = cifs_sb->mnt_dir_mode;
197                 }
198                 tmp_inode->i_mode |= S_IFDIR;
199         } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && 
200                    (attr & ATTR_SYSTEM)) {
201                 if (end_of_file == 0)  {
202                         *pobject_type = DT_FIFO;
203                         tmp_inode->i_mode |= S_IFIFO;
204                 } else {
205                         /* rather than get the type here, we mark the
206                         inode as needing revalidate and get the real type
207                         (blk vs chr vs. symlink) later ie in lookup */
208                         *pobject_type = DT_REG;
209                         tmp_inode->i_mode |= S_IFREG; 
210                         cifsInfo->time = 0;     
211                 }
212 /* we no longer mark these because we could not follow them */
213 /*        } else if (attr & ATTR_REPARSE) {
214                 *pobject_type = DT_LNK;
215                 tmp_inode->i_mode |= S_IFLNK; */
216         } else {
217                 *pobject_type = DT_REG;
218                 tmp_inode->i_mode |= S_IFREG;
219                 if (attr & ATTR_READONLY)
220                         tmp_inode->i_mode &= ~(S_IWUGO);
221                 else if ((tmp_inode->i_mode & S_IWUGO) == 0)
222                         /* the ATTR_READONLY flag may have been changed on   */
223                         /* server -- set any w bits allowed by mnt_file_mode */
224                         tmp_inode->i_mode |= (S_IWUGO & cifs_sb->mnt_file_mode);
225         } /* could add code here - to validate if device or weird share type? */
226
227         /* can not fill in nlink here as in qpathinfo version and Unx search */
228         if (atomic_read(&cifsInfo->inUse) == 0) {
229                 atomic_set(&cifsInfo->inUse, 1);
230         }
231
232         spin_lock(&tmp_inode->i_lock);
233         if (is_size_safe_to_change(cifsInfo, end_of_file)) {
234                 /* can not safely change the file size here if the 
235                 client is writing to it due to potential races */
236                 i_size_write(tmp_inode, end_of_file);
237
238         /* 512 bytes (2**9) is the fake blocksize that must be used */
239         /* for this calculation, even though the reported blocksize is larger */
240                 tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9;
241         }
242         spin_unlock(&tmp_inode->i_lock);
243
244         if (allocation_size < end_of_file)
245                 cFYI(1, ("May be sparse file, allocation less than file size"));
246         cFYI(1, ("File Size %ld and blocks %llu",
247                 (unsigned long)tmp_inode->i_size,
248                 (unsigned long long)tmp_inode->i_blocks));
249         if (S_ISREG(tmp_inode->i_mode)) {
250                 cFYI(1, ("File inode"));
251                 tmp_inode->i_op = &cifs_file_inode_ops;
252                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
253                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
254                                 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
255                         else
256                                 tmp_inode->i_fop = &cifs_file_direct_ops;
257                 
258                 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
259                         tmp_inode->i_fop = &cifs_file_nobrl_ops;
260                 else
261                         tmp_inode->i_fop = &cifs_file_ops;
262
263                 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
264                    (cifs_sb->tcon->ses->server->maxBuf <
265                         PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
266                         tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
267                 else
268                         tmp_inode->i_data.a_ops = &cifs_addr_ops;
269
270                 if (isNewInode)
271                         return; /* No sense invalidating pages for new inode
272                                    since have not started caching readahead file
273                                    data yet */
274
275                 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
276                         (local_size == tmp_inode->i_size)) {
277                         cFYI(1, ("inode exists but unchanged"));
278                 } else {
279                         /* file may have changed on server */
280                         cFYI(1, ("invalidate inode, readdir detected change"));
281                         invalidate_remote_inode(tmp_inode);
282                 }
283         } else if (S_ISDIR(tmp_inode->i_mode)) {
284                 cFYI(1, ("Directory inode"));
285                 tmp_inode->i_op = &cifs_dir_inode_ops;
286                 tmp_inode->i_fop = &cifs_dir_ops;
287         } else if (S_ISLNK(tmp_inode->i_mode)) {
288                 cFYI(1, ("Symbolic Link inode"));
289                 tmp_inode->i_op = &cifs_symlink_inode_ops;
290         } else {
291                 cFYI(1, ("Init special inode"));
292                 init_special_inode(tmp_inode, tmp_inode->i_mode,
293                                    tmp_inode->i_rdev);
294         }
295 }
296
297 static void unix_fill_in_inode(struct inode *tmp_inode,
298         FILE_UNIX_INFO *pfindData, int *pobject_type, int isNewInode)
299 {
300         loff_t local_size;
301         struct timespec local_mtime;
302
303         struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
304         struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
305
306         __u32 type = le32_to_cpu(pfindData->Type);
307         __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes);
308         __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile);
309         cifsInfo->time = jiffies;
310         atomic_inc(&cifsInfo->inUse);
311
312         /* save mtime and size */
313         local_mtime = tmp_inode->i_mtime;
314         local_size  = tmp_inode->i_size;
315
316         tmp_inode->i_atime =
317             cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
318         tmp_inode->i_mtime =
319             cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime));
320         tmp_inode->i_ctime =
321             cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange));
322
323         tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions);
324         /* since we set the inode type below we need to mask off type
325            to avoid strange results if bits above were corrupt */
326         tmp_inode->i_mode &= ~S_IFMT;
327         if (type == UNIX_FILE) {
328                 *pobject_type = DT_REG;
329                 tmp_inode->i_mode |= S_IFREG;
330         } else if (type == UNIX_SYMLINK) {
331                 *pobject_type = DT_LNK;
332                 tmp_inode->i_mode |= S_IFLNK;
333         } else if (type == UNIX_DIR) {
334                 *pobject_type = DT_DIR;
335                 tmp_inode->i_mode |= S_IFDIR;
336         } else if (type == UNIX_CHARDEV) {
337                 *pobject_type = DT_CHR;
338                 tmp_inode->i_mode |= S_IFCHR;
339                 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
340                                 le64_to_cpu(pfindData->DevMinor) & MINORMASK);
341         } else if (type == UNIX_BLOCKDEV) {
342                 *pobject_type = DT_BLK;
343                 tmp_inode->i_mode |= S_IFBLK;
344                 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
345                                 le64_to_cpu(pfindData->DevMinor) & MINORMASK);
346         } else if (type == UNIX_FIFO) {
347                 *pobject_type = DT_FIFO;
348                 tmp_inode->i_mode |= S_IFIFO;
349         } else if (type == UNIX_SOCKET) {
350                 *pobject_type = DT_SOCK;
351                 tmp_inode->i_mode |= S_IFSOCK;
352         } else {
353                 /* safest to just call it a file */
354                 *pobject_type = DT_REG;
355                 tmp_inode->i_mode |= S_IFREG;
356                 cFYI(1,("unknown inode type %d",type)); 
357         }
358
359         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
360                 tmp_inode->i_uid = cifs_sb->mnt_uid;
361         else
362                 tmp_inode->i_uid = le64_to_cpu(pfindData->Uid);
363         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
364                 tmp_inode->i_gid = cifs_sb->mnt_gid;
365         else
366                 tmp_inode->i_gid = le64_to_cpu(pfindData->Gid);
367         tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks);
368
369         spin_lock(&tmp_inode->i_lock);
370         if (is_size_safe_to_change(cifsInfo, end_of_file)) {
371                 /* can not safely change the file size here if the 
372                 client is writing to it due to potential races */
373                 i_size_write(tmp_inode, end_of_file);
374
375         /* 512 bytes (2**9) is the fake blocksize that must be used */
376         /* for this calculation, not the real blocksize */
377                 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
378         }
379         spin_unlock(&tmp_inode->i_lock);
380
381         if (S_ISREG(tmp_inode->i_mode)) {
382                 cFYI(1, ("File inode"));
383                 tmp_inode->i_op = &cifs_file_inode_ops;
384
385                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
386                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
387                                 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
388                         else
389                                 tmp_inode->i_fop = &cifs_file_direct_ops;
390                 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
391                         tmp_inode->i_fop = &cifs_file_nobrl_ops;
392                 else
393                         tmp_inode->i_fop = &cifs_file_ops;
394
395                 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
396                    (cifs_sb->tcon->ses->server->maxBuf < 
397                         PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
398                         tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
399                 else
400                         tmp_inode->i_data.a_ops = &cifs_addr_ops;
401
402                 if (isNewInode)
403                         return; /* No sense invalidating pages for new inode since we
404                                            have not started caching readahead file data yet */
405
406                 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
407                         (local_size == tmp_inode->i_size)) {
408                         cFYI(1, ("inode exists but unchanged"));
409                 } else {
410                         /* file may have changed on server */
411                         cFYI(1, ("invalidate inode, readdir detected change"));
412                         invalidate_remote_inode(tmp_inode);
413                 }
414         } else if (S_ISDIR(tmp_inode->i_mode)) {
415                 cFYI(1, ("Directory inode"));
416                 tmp_inode->i_op = &cifs_dir_inode_ops;
417                 tmp_inode->i_fop = &cifs_dir_ops;
418         } else if (S_ISLNK(tmp_inode->i_mode)) {
419                 cFYI(1, ("Symbolic Link inode"));
420                 tmp_inode->i_op = &cifs_symlink_inode_ops;
421 /* tmp_inode->i_fop = *//* do not need to set to anything */
422         } else {
423                 cFYI(1, ("Special inode")); 
424                 init_special_inode(tmp_inode, tmp_inode->i_mode,
425                                    tmp_inode->i_rdev);
426         }
427 }
428
429 static int initiate_cifs_search(const int xid, struct file *file)
430 {
431         int rc = 0;
432         char * full_path;
433         struct cifsFileInfo * cifsFile;
434         struct cifs_sb_info *cifs_sb;
435         struct cifsTconInfo *pTcon;
436
437         if (file->private_data == NULL) {
438                 file->private_data = 
439                         kzalloc(sizeof(struct cifsFileInfo),GFP_KERNEL);
440         }
441
442         if (file->private_data == NULL)
443                 return -ENOMEM;
444         cifsFile = file->private_data;
445         cifsFile->invalidHandle = TRUE;
446         cifsFile->srch_inf.endOfSearch = FALSE;
447
448         cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
449         if (cifs_sb == NULL)
450                 return -EINVAL;
451
452         pTcon = cifs_sb->tcon;
453         if (pTcon == NULL)
454                 return -EINVAL;
455
456         full_path = build_path_from_dentry(file->f_path.dentry);
457
458         if (full_path == NULL) {
459                 return -ENOMEM;
460         }
461
462         cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos));
463
464 ffirst_retry:
465         /* test for Unix extensions */
466         if (pTcon->ses->capabilities & CAP_UNIX) {
467                 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
468         } else if ((pTcon->ses->capabilities & 
469                         (CAP_NT_SMBS | CAP_NT_FIND)) == 0) {
470                 cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
471         } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
472                 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
473         } else /* not srvinos - BB fixme add check for backlevel? */ {
474                 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
475         }
476
477         rc = CIFSFindFirst(xid, pTcon,full_path,cifs_sb->local_nls,
478                 &cifsFile->netfid, &cifsFile->srch_inf,
479                 cifs_sb->mnt_cifs_flags & 
480                         CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
481         if (rc == 0)
482                 cifsFile->invalidHandle = FALSE;
483         if ((rc == -EOPNOTSUPP) && 
484                 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
485                 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
486                 goto ffirst_retry;
487         }
488         kfree(full_path);
489         return rc;
490 }
491
492 /* return length of unicode string in bytes */
493 static int cifs_unicode_bytelen(char *str)
494 {
495         int len;
496         __le16 * ustr = (__le16 *)str;
497
498         for(len=0;len <= PATH_MAX;len++) {
499                 if (ustr[len] == 0)
500                         return len << 1;
501         }
502         cFYI(1,("Unicode string longer than PATH_MAX found"));
503         return len << 1;
504 }
505
506 static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
507 {
508         char * new_entry;
509         FILE_DIRECTORY_INFO * pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
510
511         if (level == SMB_FIND_FILE_INFO_STANDARD) {
512                 FIND_FILE_STANDARD_INFO * pfData;
513                 pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
514
515                 new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
516                                 pfData->FileNameLength;
517         } else
518                 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
519         cFYI(1,("new entry %p old entry %p",new_entry,old_entry));
520         /* validate that new_entry is not past end of SMB */
521         if (new_entry >= end_of_smb) {
522                 cERROR(1,
523                       ("search entry %p began after end of SMB %p old entry %p",
524                         new_entry, end_of_smb, old_entry)); 
525                 return NULL;
526         } else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
527                    (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) ||
528                   ((level != SMB_FIND_FILE_INFO_STANDARD) &&
529                    (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb)))  {
530                 cERROR(1,("search entry %p extends after end of SMB %p",
531                         new_entry, end_of_smb));
532                 return NULL;
533         } else 
534                 return new_entry;
535
536 }
537
538 #define UNICODE_DOT cpu_to_le16(0x2e)
539
540 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
541 static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile)
542 {
543         int rc = 0;
544         char * filename = NULL;
545         int len = 0; 
546
547         if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) {
548                 FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
549                 filename = &pFindData->FileName[0];
550                 if (cfile->srch_inf.unicode) {
551                         len = cifs_unicode_bytelen(filename);
552                 } else {
553                         /* BB should we make this strnlen of PATH_MAX? */
554                         len = strnlen(filename, 5);
555                 }
556         } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) {
557                 FILE_DIRECTORY_INFO * pFindData = 
558                         (FILE_DIRECTORY_INFO *)current_entry;
559                 filename = &pFindData->FileName[0];
560                 len = le32_to_cpu(pFindData->FileNameLength);
561         } else if (cfile->srch_inf.info_level == 
562                         SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
563                 FILE_FULL_DIRECTORY_INFO * pFindData = 
564                         (FILE_FULL_DIRECTORY_INFO *)current_entry;
565                 filename = &pFindData->FileName[0];
566                 len = le32_to_cpu(pFindData->FileNameLength);
567         } else if (cfile->srch_inf.info_level ==
568                         SMB_FIND_FILE_ID_FULL_DIR_INFO) {
569                 SEARCH_ID_FULL_DIR_INFO * pFindData = 
570                         (SEARCH_ID_FULL_DIR_INFO *)current_entry;
571                 filename = &pFindData->FileName[0];
572                 len = le32_to_cpu(pFindData->FileNameLength);
573         } else if (cfile->srch_inf.info_level == 
574                         SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
575                 FILE_BOTH_DIRECTORY_INFO * pFindData = 
576                         (FILE_BOTH_DIRECTORY_INFO *)current_entry;
577                 filename = &pFindData->FileName[0];
578                 len = le32_to_cpu(pFindData->FileNameLength);
579         } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) {
580                 FIND_FILE_STANDARD_INFO * pFindData =
581                         (FIND_FILE_STANDARD_INFO *)current_entry;
582                 filename = &pFindData->FileName[0];
583                 len = pFindData->FileNameLength;
584         } else {
585                 cFYI(1,("Unknown findfirst level %d",cfile->srch_inf.info_level));
586         }
587
588         if (filename) {
589                 if (cfile->srch_inf.unicode) {
590                         __le16 *ufilename = (__le16 *)filename;
591                         if (len == 2) {
592                                 /* check for . */
593                                 if (ufilename[0] == UNICODE_DOT)
594                                         rc = 1;
595                         } else if (len == 4) {
596                                 /* check for .. */
597                                 if ((ufilename[0] == UNICODE_DOT)
598                                    &&(ufilename[1] == UNICODE_DOT))
599                                         rc = 2;
600                         }
601                 } else /* ASCII */ {
602                         if (len == 1) {
603                                 if (filename[0] == '.') 
604                                         rc = 1;
605                         } else if (len == 2) {
606                                 if((filename[0] == '.') && (filename[1] == '.'))
607                                         rc = 2;
608                         }
609                 }
610         }
611
612         return rc;
613 }
614
615 /* Check if directory that we are searching has changed so we can decide
616    whether we can use the cached search results from the previous search */
617 static int is_dir_changed(struct file * file)
618 {
619         struct inode *inode = file->f_path.dentry->d_inode;
620         struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
621
622         if (cifsInfo->time == 0)
623                 return 1; /* directory was changed, perhaps due to unlink */
624         else
625                 return 0;
626
627 }
628
629 /* find the corresponding entry in the search */
630 /* Note that the SMB server returns search entries for . and .. which
631    complicates logic here if we choose to parse for them and we do not
632    assume that they are located in the findfirst return buffer.*/
633 /* We start counting in the buffer with entry 2 and increment for every
634    entry (do not increment for . or .. entry) */
635 static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
636         struct file *file, char **ppCurrentEntry, int *num_to_ret) 
637 {
638         int rc = 0;
639         int pos_in_buf = 0;
640         loff_t first_entry_in_buffer;
641         loff_t index_to_find = file->f_pos;
642         struct cifsFileInfo * cifsFile = file->private_data;
643         /* check if index in the buffer */
644         
645         if ((cifsFile == NULL) || (ppCurrentEntry == NULL) || 
646            (num_to_ret == NULL))
647                 return -ENOENT;
648         
649         *ppCurrentEntry = NULL;
650         first_entry_in_buffer = 
651                 cifsFile->srch_inf.index_of_last_entry - 
652                         cifsFile->srch_inf.entries_in_buffer;
653
654         /* if first entry in buf is zero then is first buffer
655         in search response data which means it is likely . and ..
656         will be in this buffer, although some servers do not return
657         . and .. for the root of a drive and for those we need
658         to start two entries earlier */
659
660 #ifdef CONFIG_CIFS_DEBUG2
661         dump_cifs_file_struct(file, "In fce ");
662 #endif
663         if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) && 
664              is_dir_changed(file)) || 
665            (index_to_find < first_entry_in_buffer)) {
666                 /* close and restart search */
667                 cFYI(1,("search backing up - close and restart search"));
668                 cifsFile->invalidHandle = TRUE;
669                 CIFSFindClose(xid, pTcon, cifsFile->netfid);
670                 kfree(cifsFile->search_resume_name);
671                 cifsFile->search_resume_name = NULL;
672                 if (cifsFile->srch_inf.ntwrk_buf_start) {
673                         cFYI(1,("freeing SMB ff cache buf on search rewind"));
674                         if (cifsFile->srch_inf.smallBuf)
675                                 cifs_small_buf_release(cifsFile->srch_inf.
676                                                 ntwrk_buf_start);
677                         else
678                                 cifs_buf_release(cifsFile->srch_inf.
679                                                 ntwrk_buf_start);
680                 }
681                 rc = initiate_cifs_search(xid,file);
682                 if (rc) {
683                         cFYI(1,("error %d reinitiating a search on rewind",rc));
684                         return rc;
685                 }
686         }
687
688         while((index_to_find >= cifsFile->srch_inf.index_of_last_entry) && 
689               (rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)){
690                 cFYI(1,("calling findnext2"));
691                 rc = CIFSFindNext(xid,pTcon,cifsFile->netfid, 
692                                   &cifsFile->srch_inf);
693                 if (rc)
694                         return -ENOENT;
695         }
696         if (index_to_find < cifsFile->srch_inf.index_of_last_entry) {
697                 /* we found the buffer that contains the entry */
698                 /* scan and find it */
699                 int i;
700                 char * current_entry;
701                 char * end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + 
702                         smbCalcSize((struct smb_hdr *)
703                                 cifsFile->srch_inf.ntwrk_buf_start);
704
705                 current_entry = cifsFile->srch_inf.srch_entries_start;
706                 first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
707                                         - cifsFile->srch_inf.entries_in_buffer;
708                 pos_in_buf = index_to_find - first_entry_in_buffer;
709                 cFYI(1,("found entry - pos_in_buf %d",pos_in_buf));
710
711                 for(i=0;(i<(pos_in_buf)) && (current_entry != NULL);i++) {
712                         /* go entry by entry figuring out which is first */
713                         current_entry = nxt_dir_entry(current_entry,end_of_smb,
714                                                 cifsFile->srch_inf.info_level);
715                 }
716                 if((current_entry == NULL) && (i < pos_in_buf)) {
717                         /* BB fixme - check if we should flag this error */
718                         cERROR(1,("reached end of buf searching for pos in buf"
719                           " %d index to find %lld rc %d",
720                           pos_in_buf,index_to_find,rc));
721                 }
722                 rc = 0;
723                 *ppCurrentEntry = current_entry;
724         } else {
725                 cFYI(1,("index not in buffer - could not findnext into it"));
726                 return 0;
727         }
728
729         if(pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
730                 cFYI(1,("can not return entries pos_in_buf beyond last entry"));
731                 *num_to_ret = 0;
732         } else
733                 *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
734
735         return rc;
736 }
737
738 /* inode num, inode type and filename returned */
739 static int cifs_get_name_from_search_buf(struct qstr *pqst,
740         char *current_entry, __u16 level, unsigned int unicode,
741         struct cifs_sb_info * cifs_sb, int max_len, ino_t *pinum)
742 {
743         int rc = 0;
744         unsigned int len = 0;
745         char * filename;
746         struct nls_table * nlt = cifs_sb->local_nls;
747
748         *pinum = 0;
749
750         if(level == SMB_FIND_FILE_UNIX) {
751                 FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
752
753                 filename = &pFindData->FileName[0];
754                 if(unicode) {
755                         len = cifs_unicode_bytelen(filename);
756                 } else {
757                         /* BB should we make this strnlen of PATH_MAX? */
758                         len = strnlen(filename, PATH_MAX);
759                 }
760
761                 /* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */
762                 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
763                         *pinum = pFindData->UniqueId;
764         } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) {
765                 FILE_DIRECTORY_INFO * pFindData = 
766                         (FILE_DIRECTORY_INFO *)current_entry;
767                 filename = &pFindData->FileName[0];
768                 len = le32_to_cpu(pFindData->FileNameLength);
769         } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
770                 FILE_FULL_DIRECTORY_INFO * pFindData = 
771                         (FILE_FULL_DIRECTORY_INFO *)current_entry;
772                 filename = &pFindData->FileName[0];
773                 len = le32_to_cpu(pFindData->FileNameLength);
774         } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
775                 SEARCH_ID_FULL_DIR_INFO * pFindData = 
776                         (SEARCH_ID_FULL_DIR_INFO *)current_entry;
777                 filename = &pFindData->FileName[0];
778                 len = le32_to_cpu(pFindData->FileNameLength);
779                 *pinum = pFindData->UniqueId;
780         } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
781                 FILE_BOTH_DIRECTORY_INFO * pFindData = 
782                         (FILE_BOTH_DIRECTORY_INFO *)current_entry;
783                 filename = &pFindData->FileName[0];
784                 len = le32_to_cpu(pFindData->FileNameLength);
785         } else if(level == SMB_FIND_FILE_INFO_STANDARD) {
786                 FIND_FILE_STANDARD_INFO * pFindData =
787                         (FIND_FILE_STANDARD_INFO *)current_entry;
788                 filename = &pFindData->FileName[0];
789                 /* one byte length, no name conversion */
790                 len = (unsigned int)pFindData->FileNameLength;
791         } else {
792                 cFYI(1,("Unknown findfirst level %d",level));
793                 return -EINVAL;
794         }
795
796         if(len > max_len) {
797                 cERROR(1,("bad search response length %d past smb end", len));
798                 return -EINVAL;
799         }
800
801         if(unicode) {
802                 /* BB fixme - test with long names */
803                 /* Note converted filename can be longer than in unicode */
804                 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
805                         pqst->len = cifs_convertUCSpath((char *)pqst->name,
806                                         (__le16 *)filename, len/2, nlt);
807                 else
808                         pqst->len = cifs_strfromUCS_le((char *)pqst->name,
809                                         (__le16 *)filename,len/2,nlt);
810         } else {
811                 pqst->name = filename;
812                 pqst->len = len;
813         }
814         pqst->hash = full_name_hash(pqst->name,pqst->len);
815 /*      cFYI(1,("filldir on %s",pqst->name));  */
816         return rc;
817 }
818
819 static int cifs_filldir(char *pfindEntry, struct file *file,
820         filldir_t filldir, void *direntry, char *scratch_buf, int max_len)
821 {
822         int rc = 0;
823         struct qstr qstring;
824         struct cifsFileInfo * pCifsF;
825         unsigned obj_type;
826         ino_t  inum;
827         struct cifs_sb_info * cifs_sb;
828         struct inode *tmp_inode;
829         struct dentry *tmp_dentry;
830
831         /* get filename and len into qstring */
832         /* get dentry */
833         /* decide whether to create and populate ionde */
834         if((direntry == NULL) || (file == NULL))
835                 return -EINVAL;
836
837         pCifsF = file->private_data;
838         
839         if((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL))
840                 return -ENOENT;
841
842         rc = cifs_entry_is_dot(pfindEntry,pCifsF);
843         /* skip . and .. since we added them first */
844         if(rc != 0) 
845                 return 0;
846
847         cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
848
849         qstring.name = scratch_buf;
850         rc = cifs_get_name_from_search_buf(&qstring,pfindEntry,
851                         pCifsF->srch_inf.info_level,
852                         pCifsF->srch_inf.unicode,cifs_sb,
853                         max_len,
854                         &inum /* returned */);
855
856         if(rc)
857                 return rc;
858
859         rc = construct_dentry(&qstring,file,&tmp_inode, &tmp_dentry);
860         if((tmp_inode == NULL) || (tmp_dentry == NULL))
861                 return -ENOMEM;
862
863         if(rc) {
864                 /* inode created, we need to hash it with right inode number */
865                 if(inum != 0) {
866                         /* BB fixme - hash the 2 32 quantities bits together if necessary BB */
867                         tmp_inode->i_ino = inum;
868                 }
869                 insert_inode_hash(tmp_inode);
870         }
871
872         /* we pass in rc below, indicating whether it is a new inode,
873            so we can figure out whether to invalidate the inode cached
874            data if the file has changed */
875         if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX)
876                 unix_fill_in_inode(tmp_inode,
877                                    (FILE_UNIX_INFO *)pfindEntry,
878                                    &obj_type, rc);
879         else if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD)
880                 fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */,
881                                 pfindEntry, &obj_type, rc);
882         else
883                 fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc);
884
885         if(rc) /* new inode - needs to be tied to dentry */ {
886                 d_instantiate(tmp_dentry, tmp_inode);
887                 if(rc == 2)
888                         d_rehash(tmp_dentry);
889         }
890         
891         
892         rc = filldir(direntry,qstring.name,qstring.len,file->f_pos,
893                      tmp_inode->i_ino,obj_type);
894         if(rc) {
895                 cFYI(1,("filldir rc = %d",rc));
896                 /* we can not return filldir errors to the caller
897                 since they are "normal" when the stat blocksize
898                 is too small - we return remapped error instead */
899                 rc = -EOVERFLOW;
900         }
901
902         dput(tmp_dentry);
903         return rc;
904 }
905
906 static int cifs_save_resume_key(const char *current_entry,
907         struct cifsFileInfo *cifsFile)
908 {
909         int rc = 0;
910         unsigned int len = 0;
911         __u16 level;
912         char * filename;
913
914         if((cifsFile == NULL) || (current_entry == NULL))
915                 return -EINVAL;
916
917         level = cifsFile->srch_inf.info_level;
918
919         if(level == SMB_FIND_FILE_UNIX) {
920                 FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
921
922                 filename = &pFindData->FileName[0];
923                 if(cifsFile->srch_inf.unicode) {
924                         len = cifs_unicode_bytelen(filename);
925                 } else {
926                         /* BB should we make this strnlen of PATH_MAX? */
927                         len = strnlen(filename, PATH_MAX);
928                 }
929                 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
930         } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) {
931                 FILE_DIRECTORY_INFO * pFindData = 
932                         (FILE_DIRECTORY_INFO *)current_entry;
933                 filename = &pFindData->FileName[0];
934                 len = le32_to_cpu(pFindData->FileNameLength);
935                 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
936         } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
937                 FILE_FULL_DIRECTORY_INFO * pFindData = 
938                         (FILE_FULL_DIRECTORY_INFO *)current_entry;
939                 filename = &pFindData->FileName[0];
940                 len = le32_to_cpu(pFindData->FileNameLength);
941                 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
942         } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
943                 SEARCH_ID_FULL_DIR_INFO * pFindData = 
944                         (SEARCH_ID_FULL_DIR_INFO *)current_entry;
945                 filename = &pFindData->FileName[0];
946                 len = le32_to_cpu(pFindData->FileNameLength);
947                 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
948         } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
949                 FILE_BOTH_DIRECTORY_INFO * pFindData = 
950                         (FILE_BOTH_DIRECTORY_INFO *)current_entry;
951                 filename = &pFindData->FileName[0];
952                 len = le32_to_cpu(pFindData->FileNameLength);
953                 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
954         } else if(level == SMB_FIND_FILE_INFO_STANDARD) {
955                 FIND_FILE_STANDARD_INFO * pFindData =
956                         (FIND_FILE_STANDARD_INFO *)current_entry;
957                 filename = &pFindData->FileName[0];
958                 /* one byte length, no name conversion */
959                 len = (unsigned int)pFindData->FileNameLength;
960                 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
961         } else {
962                 cFYI(1,("Unknown findfirst level %d",level));
963                 return -EINVAL;
964         }
965         cifsFile->srch_inf.resume_name_len = len;
966         cifsFile->srch_inf.presume_name = filename;
967         return rc;
968 }
969
970 int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
971 {
972         int rc = 0;
973         int xid,i;
974         struct cifs_sb_info *cifs_sb;
975         struct cifsTconInfo *pTcon;
976         struct cifsFileInfo *cifsFile = NULL;
977         char * current_entry;
978         int num_to_fill = 0;
979         char * tmp_buf = NULL;
980         char * end_of_smb;
981         int max_len;
982
983         xid = GetXid();
984
985         cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
986         pTcon = cifs_sb->tcon;
987         if(pTcon == NULL)
988                 return -EINVAL;
989
990         switch ((int) file->f_pos) {
991         case 0:
992                 if (filldir(direntry, ".", 1, file->f_pos,
993                      file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) {
994                         cERROR(1, ("Filldir for current dir failed"));
995                         rc = -ENOMEM;
996                         break;
997                 }
998                 file->f_pos++;
999         case 1:
1000                 if (filldir(direntry, "..", 2, file->f_pos,
1001                      file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
1002                         cERROR(1, ("Filldir for parent dir failed"));
1003                         rc = -ENOMEM;
1004                         break;
1005                 }
1006                 file->f_pos++;
1007         default:
1008                 /* 1) If search is active, 
1009                         is in current search buffer? 
1010                         if it before then restart search
1011                         if after then keep searching till find it */
1012
1013                 if(file->private_data == NULL) {
1014                         rc = initiate_cifs_search(xid,file);
1015                         cFYI(1,("initiate cifs search rc %d",rc));
1016                         if(rc) {
1017                                 FreeXid(xid);
1018                                 return rc;
1019                         }
1020                 }
1021                 if(file->private_data == NULL) {
1022                         rc = -EINVAL;
1023                         FreeXid(xid);
1024                         return rc;
1025                 }
1026                 cifsFile = file->private_data;
1027                 if (cifsFile->srch_inf.endOfSearch) {
1028                         if(cifsFile->srch_inf.emptyDir) {
1029                                 cFYI(1, ("End of search, empty dir"));
1030                                 rc = 0;
1031                                 break;
1032                         }
1033                 } /* else {
1034                         cifsFile->invalidHandle = TRUE;
1035                         CIFSFindClose(xid, pTcon, cifsFile->netfid);
1036                 } 
1037                 kfree(cifsFile->search_resume_name);
1038                 cifsFile->search_resume_name = NULL; */
1039
1040                 rc = find_cifs_entry(xid,pTcon, file,
1041                                 &current_entry,&num_to_fill);
1042                 if(rc) {
1043                         cFYI(1,("fce error %d",rc)); 
1044                         goto rddir2_exit;
1045                 } else if (current_entry != NULL) {
1046                         cFYI(1,("entry %lld found",file->f_pos));
1047                 } else {
1048                         cFYI(1,("could not find entry"));
1049                         goto rddir2_exit;
1050                 }
1051                 cFYI(1,("loop through %d times filling dir for net buf %p",
1052                         num_to_fill,cifsFile->srch_inf.ntwrk_buf_start));
1053                 max_len = smbCalcSize((struct smb_hdr *)
1054                                 cifsFile->srch_inf.ntwrk_buf_start);
1055                 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
1056
1057                 /* To be safe - for UCS to UTF-8 with strings loaded
1058                 with the rare long characters alloc more to account for
1059                 such multibyte target UTF-8 characters. cifs_unicode.c,
1060                 which actually does the conversion, has the same limit */
1061                 tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL);
1062                 for(i=0;(i<num_to_fill) && (rc == 0);i++) {
1063                         if(current_entry == NULL) {
1064                                 /* evaluate whether this case is an error */
1065                                 cERROR(1,("past end of SMB num to fill %d i %d",
1066                                           num_to_fill, i));
1067                                 break;
1068                         }
1069                         /* if buggy server returns . and .. late do
1070                         we want to check for that here? */
1071                         rc = cifs_filldir(current_entry, file,
1072                                         filldir, direntry, tmp_buf, max_len);
1073                         if(rc == -EOVERFLOW) {
1074                                 rc = 0;
1075                                 break;
1076                         }
1077
1078                         file->f_pos++;
1079                         if(file->f_pos == 
1080                                 cifsFile->srch_inf.index_of_last_entry) {
1081                                 cFYI(1,("last entry in buf at pos %lld %s",
1082                                         file->f_pos,tmp_buf));
1083                                 cifs_save_resume_key(current_entry,cifsFile);
1084                                 break;
1085                         } else 
1086                                 current_entry = 
1087                                         nxt_dir_entry(current_entry, end_of_smb,
1088                                                 cifsFile->srch_inf.info_level);
1089                 }
1090                 kfree(tmp_buf);
1091                 break;
1092         } /* end switch */
1093
1094 rddir2_exit:
1095         FreeXid(xid);
1096         return rc;
1097 }