Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * fs/cifs/readdir.c | |
3 | * | |
4 | * Directory search handling | |
6dc0f87e | 5 | * |
ad7a2926 | 6 | * Copyright (C) International Business Machines Corp., 2004, 2008 |
1da177e4 LT |
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> | |
273d81d6 | 24 | #include <linux/pagemap.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
1da177e4 | 26 | #include <linux/stat.h> |
1da177e4 LT |
27 | #include "cifspdu.h" |
28 | #include "cifsglob.h" | |
29 | #include "cifsproto.h" | |
30 | #include "cifs_unicode.h" | |
31 | #include "cifs_debug.h" | |
32 | #include "cifs_fs_sb.h" | |
33 | #include "cifsfs.h" | |
34 | ||
f5884166 JL |
35 | /* |
36 | * To be safe - for UCS to UTF-8 with strings loaded with the rare long | |
37 | * characters alloc more to account for such multibyte target UTF-8 | |
38 | * characters. | |
39 | */ | |
40 | #define UNICODE_NAME_MAX ((4 * NAME_MAX) + 2) | |
41 | ||
3979877e SF |
42 | #ifdef CONFIG_CIFS_DEBUG2 |
43 | static void dump_cifs_file_struct(struct file *file, char *label) | |
1da177e4 | 44 | { |
6dc0f87e | 45 | struct cifsFileInfo *cf; |
1da177e4 | 46 | |
4523cc30 | 47 | if (file) { |
1da177e4 | 48 | cf = file->private_data; |
4523cc30 | 49 | if (cf == NULL) { |
b6b38f70 | 50 | cFYI(1, "empty cifs private file data"); |
1da177e4 LT |
51 | return; |
52 | } | |
ad7a2926 | 53 | if (cf->invalidHandle) |
b6b38f70 | 54 | cFYI(1, "invalid handle"); |
ad7a2926 | 55 | if (cf->srch_inf.endOfSearch) |
b6b38f70 | 56 | cFYI(1, "end of search"); |
ad7a2926 | 57 | if (cf->srch_inf.emptyDir) |
b6b38f70 | 58 | cFYI(1, "empty dir"); |
1da177e4 | 59 | } |
3979877e | 60 | } |
90c81e0b SF |
61 | #else |
62 | static inline void dump_cifs_file_struct(struct file *file, char *label) | |
63 | { | |
64 | } | |
3979877e | 65 | #endif /* DEBUG2 */ |
1da177e4 | 66 | |
cc0bad75 JL |
67 | /* |
68 | * Find the dentry that matches "name". If there isn't one, create one. If it's | |
69 | * a negative dentry or the uniqueid changed, then drop it and recreate it. | |
70 | */ | |
71 | static struct dentry * | |
72 | cifs_readdir_lookup(struct dentry *parent, struct qstr *name, | |
73 | struct cifs_fattr *fattr) | |
74 | { | |
75 | struct dentry *dentry, *alias; | |
76 | struct inode *inode; | |
77 | struct super_block *sb = parent->d_inode->i_sb; | |
78 | ||
b6b38f70 | 79 | cFYI(1, "For %s", name->name); |
cc0bad75 | 80 | |
05507fa2 JL |
81 | if (parent->d_op && parent->d_op->d_hash) |
82 | parent->d_op->d_hash(parent, name); | |
83 | else | |
84 | name->hash = full_name_hash(name->name, name->len); | |
85 | ||
cc0bad75 JL |
86 | dentry = d_lookup(parent, name); |
87 | if (dentry) { | |
88 | /* FIXME: check for inode number changes? */ | |
89 | if (dentry->d_inode != NULL) | |
90 | return dentry; | |
91 | d_drop(dentry); | |
92 | dput(dentry); | |
93 | } | |
94 | ||
95 | dentry = d_alloc(parent, name); | |
96 | if (dentry == NULL) | |
97 | return NULL; | |
98 | ||
99 | inode = cifs_iget(sb, fattr); | |
100 | if (!inode) { | |
101 | dput(dentry); | |
102 | return NULL; | |
103 | } | |
104 | ||
105 | if (CIFS_SB(sb)->tcon->nocase) | |
106 | dentry->d_op = &cifs_ci_dentry_ops; | |
107 | else | |
108 | dentry->d_op = &cifs_dentry_ops; | |
109 | ||
110 | alias = d_materialise_unique(dentry, inode); | |
111 | if (alias != NULL) { | |
112 | dput(dentry); | |
113 | if (IS_ERR(alias)) | |
114 | return NULL; | |
115 | dentry = alias; | |
116 | } | |
117 | ||
118 | return dentry; | |
119 | } | |
120 | ||
0b8f18e3 JL |
121 | static void |
122 | cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb) | |
1da177e4 | 123 | { |
0b8f18e3 JL |
124 | fattr->cf_uid = cifs_sb->mnt_uid; |
125 | fattr->cf_gid = cifs_sb->mnt_gid; | |
1da177e4 | 126 | |
0b8f18e3 JL |
127 | if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { |
128 | fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode; | |
129 | fattr->cf_dtype = DT_DIR; | |
1da177e4 | 130 | } else { |
0b8f18e3 JL |
131 | fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode; |
132 | fattr->cf_dtype = DT_REG; | |
1da177e4 LT |
133 | } |
134 | ||
0b8f18e3 JL |
135 | if (fattr->cf_cifsattrs & ATTR_READONLY) |
136 | fattr->cf_mode &= ~S_IWUGO; | |
5bafd765 | 137 | |
0b8f18e3 JL |
138 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL && |
139 | fattr->cf_cifsattrs & ATTR_SYSTEM) { | |
140 | if (fattr->cf_eof == 0) { | |
141 | fattr->cf_mode &= ~S_IFMT; | |
142 | fattr->cf_mode |= S_IFIFO; | |
143 | fattr->cf_dtype = DT_FIFO; | |
3020a1f5 | 144 | } else { |
4468eb3f | 145 | /* |
0b8f18e3 JL |
146 | * trying to get the type and mode via SFU can be slow, |
147 | * so just call those regular files for now, and mark | |
148 | * for reval | |
4468eb3f | 149 | */ |
0b8f18e3 | 150 | fattr->cf_flags |= CIFS_FATTR_NEED_REVAL; |
4468eb3f JL |
151 | } |
152 | } | |
0b8f18e3 | 153 | } |
1da177e4 | 154 | |
15dd4781 | 155 | static void |
0b8f18e3 JL |
156 | cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info, |
157 | struct cifs_sb_info *cifs_sb) | |
158 | { | |
159 | memset(fattr, 0, sizeof(*fattr)); | |
160 | fattr->cf_cifsattrs = le32_to_cpu(info->ExtFileAttributes); | |
161 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
162 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); | |
163 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
164 | fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); | |
165 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); | |
166 | ||
167 | cifs_fill_common_info(fattr, cifs_sb); | |
168 | } | |
1da177e4 | 169 | |
15dd4781 | 170 | static void |
0b8f18e3 JL |
171 | cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info, |
172 | struct cifs_sb_info *cifs_sb) | |
173 | { | |
174 | int offset = cifs_sb->tcon->ses->server->timeAdj; | |
1da177e4 | 175 | |
0b8f18e3 JL |
176 | memset(fattr, 0, sizeof(*fattr)); |
177 | fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate, | |
178 | info->LastAccessTime, offset); | |
179 | fattr->cf_ctime = cnvrtDosUnixTm(info->LastWriteDate, | |
180 | info->LastWriteTime, offset); | |
181 | fattr->cf_mtime = cnvrtDosUnixTm(info->LastWriteDate, | |
182 | info->LastWriteTime, offset); | |
183 | ||
184 | fattr->cf_cifsattrs = le16_to_cpu(info->Attributes); | |
185 | fattr->cf_bytes = le32_to_cpu(info->AllocationSize); | |
186 | fattr->cf_eof = le32_to_cpu(info->DataSize); | |
187 | ||
188 | cifs_fill_common_info(fattr, cifs_sb); | |
1da177e4 LT |
189 | } |
190 | ||
0e0d2cf3 SF |
191 | /* BB eventually need to add the following helper function to |
192 | resolve NT_STATUS_STOPPED_ON_SYMLINK return code when | |
193 | we try to do FindFirst on (NTFS) directory symlinks */ | |
194 | /* | |
195 | int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb, | |
196 | int xid) | |
197 | { | |
198 | __u16 fid; | |
199 | int len; | |
200 | int oplock = 0; | |
201 | int rc; | |
202 | struct cifsTconInfo *ptcon = cifs_sb->tcon; | |
203 | char *tmpbuffer; | |
204 | ||
205 | rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ, | |
206 | OPEN_REPARSE_POINT, &fid, &oplock, NULL, | |
207 | cifs_sb->local_nls, | |
208 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
209 | if (!rc) { | |
210 | tmpbuffer = kmalloc(maxpath); | |
211 | rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path, | |
212 | tmpbuffer, | |
213 | maxpath -1, | |
214 | fid, | |
215 | cifs_sb->local_nls); | |
216 | if (CIFSSMBClose(xid, ptcon, fid)) { | |
b6b38f70 | 217 | cFYI(1, "Error closing temporary reparsepoint open"); |
0e0d2cf3 SF |
218 | } |
219 | } | |
220 | } | |
221 | */ | |
222 | ||
1da177e4 LT |
223 | static int initiate_cifs_search(const int xid, struct file *file) |
224 | { | |
225 | int rc = 0; | |
3870253e SF |
226 | char *full_path; |
227 | struct cifsFileInfo *cifsFile; | |
1da177e4 LT |
228 | struct cifs_sb_info *cifs_sb; |
229 | struct cifsTconInfo *pTcon; | |
230 | ||
4523cc30 | 231 | if (file->private_data == NULL) { |
3870253e SF |
232 | file->private_data = |
233 | kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); | |
1da177e4 LT |
234 | } |
235 | ||
4523cc30 | 236 | if (file->private_data == NULL) |
1da177e4 | 237 | return -ENOMEM; |
1da177e4 | 238 | cifsFile = file->private_data; |
4b18f2a9 SF |
239 | cifsFile->invalidHandle = true; |
240 | cifsFile->srch_inf.endOfSearch = false; | |
1da177e4 | 241 | |
e6a00296 | 242 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
4523cc30 | 243 | if (cifs_sb == NULL) |
1da177e4 LT |
244 | return -EINVAL; |
245 | ||
246 | pTcon = cifs_sb->tcon; | |
4523cc30 | 247 | if (pTcon == NULL) |
1da177e4 LT |
248 | return -EINVAL; |
249 | ||
e6a00296 | 250 | full_path = build_path_from_dentry(file->f_path.dentry); |
1da177e4 | 251 | |
ad7a2926 | 252 | if (full_path == NULL) |
1da177e4 | 253 | return -ENOMEM; |
1da177e4 | 254 | |
b6b38f70 | 255 | cFYI(1, "Full path: %s start at: %lld", full_path, file->f_pos); |
1da177e4 | 256 | |
75cf6bdc | 257 | ffirst_retry: |
1da177e4 | 258 | /* test for Unix extensions */ |
c18c842b SF |
259 | /* but now check for them on the share/mount not on the SMB session */ |
260 | /* if (pTcon->ses->capabilities & CAP_UNIX) { */ | |
ad7a2926 | 261 | if (pTcon->unix_ext) |
5bafd765 | 262 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX; |
ad7a2926 | 263 | else if ((pTcon->ses->capabilities & |
5bafd765 SF |
264 | (CAP_NT_SMBS | CAP_NT_FIND)) == 0) { |
265 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD; | |
1da177e4 LT |
266 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
267 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; | |
268 | } else /* not srvinos - BB fixme add check for backlevel? */ { | |
269 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
270 | } | |
271 | ||
3870253e | 272 | rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls, |
737b758c | 273 | &cifsFile->netfid, &cifsFile->srch_inf, |
3870253e | 274 | cifs_sb->mnt_cifs_flags & |
eafe8701 | 275 | CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); |
4523cc30 | 276 | if (rc == 0) |
4b18f2a9 | 277 | cifsFile->invalidHandle = false; |
e836f015 | 278 | /* BB add following call to handle readdir on new NTFS symlink errors |
0e0d2cf3 SF |
279 | else if STATUS_STOPPED_ON_SYMLINK |
280 | call get_symlink_reparse_path and retry with new path */ | |
281 | else if ((rc == -EOPNOTSUPP) && | |
75cf6bdc SF |
282 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
283 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; | |
284 | goto ffirst_retry; | |
285 | } | |
1da177e4 LT |
286 | kfree(full_path); |
287 | return rc; | |
288 | } | |
289 | ||
290 | /* return length of unicode string in bytes */ | |
291 | static int cifs_unicode_bytelen(char *str) | |
292 | { | |
293 | int len; | |
63d2583f | 294 | __le16 *ustr = (__le16 *)str; |
1da177e4 | 295 | |
3870253e | 296 | for (len = 0; len <= PATH_MAX; len++) { |
4523cc30 | 297 | if (ustr[len] == 0) |
1da177e4 LT |
298 | return len << 1; |
299 | } | |
b6b38f70 | 300 | cFYI(1, "Unicode string longer than PATH_MAX found"); |
1da177e4 LT |
301 | return len << 1; |
302 | } | |
303 | ||
5bafd765 | 304 | static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level) |
1da177e4 | 305 | { |
3870253e | 306 | char *new_entry; |
ad7a2926 | 307 | FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry; |
1da177e4 | 308 | |
4523cc30 | 309 | if (level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 310 | FIND_FILE_STANDARD_INFO *pfData; |
5bafd765 SF |
311 | pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo; |
312 | ||
313 | new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) + | |
314 | pfData->FileNameLength; | |
315 | } else | |
316 | new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset); | |
b6b38f70 | 317 | cFYI(1, "new entry %p old entry %p", new_entry, old_entry); |
1da177e4 | 318 | /* validate that new_entry is not past end of SMB */ |
4523cc30 | 319 | if (new_entry >= end_of_smb) { |
b6b38f70 JP |
320 | cERROR(1, "search entry %p began after end of SMB %p old entry %p", |
321 | new_entry, end_of_smb, old_entry); | |
1da177e4 | 322 | return NULL; |
4523cc30 | 323 | } else if (((level == SMB_FIND_FILE_INFO_STANDARD) && |
3870253e SF |
324 | (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) |
325 | || ((level != SMB_FIND_FILE_INFO_STANDARD) && | |
5bafd765 | 326 | (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) { |
b6b38f70 JP |
327 | cERROR(1, "search entry %p extends after end of SMB %p", |
328 | new_entry, end_of_smb); | |
09d1db5c | 329 | return NULL; |
3870253e | 330 | } else |
1da177e4 LT |
331 | return new_entry; |
332 | ||
333 | } | |
334 | ||
335 | #define UNICODE_DOT cpu_to_le16(0x2e) | |
336 | ||
337 | /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */ | |
338 | static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile) | |
339 | { | |
340 | int rc = 0; | |
3870253e SF |
341 | char *filename = NULL; |
342 | int len = 0; | |
1da177e4 | 343 | |
4523cc30 | 344 | if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) { |
ad7a2926 | 345 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; |
1da177e4 | 346 | filename = &pFindData->FileName[0]; |
4523cc30 | 347 | if (cfile->srch_inf.unicode) { |
1da177e4 LT |
348 | len = cifs_unicode_bytelen(filename); |
349 | } else { | |
350 | /* BB should we make this strnlen of PATH_MAX? */ | |
351 | len = strnlen(filename, 5); | |
352 | } | |
4523cc30 | 353 | } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) { |
ad7a2926 | 354 | FILE_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
355 | (FILE_DIRECTORY_INFO *)current_entry; |
356 | filename = &pFindData->FileName[0]; | |
357 | len = le32_to_cpu(pFindData->FileNameLength); | |
3870253e | 358 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 359 | SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
ad7a2926 | 360 | FILE_FULL_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
361 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
362 | filename = &pFindData->FileName[0]; | |
363 | len = le32_to_cpu(pFindData->FileNameLength); | |
4523cc30 | 364 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 365 | SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
ad7a2926 | 366 | SEARCH_ID_FULL_DIR_INFO *pFindData = |
1da177e4 LT |
367 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
368 | filename = &pFindData->FileName[0]; | |
369 | len = le32_to_cpu(pFindData->FileNameLength); | |
3870253e | 370 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 371 | SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
ad7a2926 | 372 | FILE_BOTH_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
373 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
374 | filename = &pFindData->FileName[0]; | |
375 | len = le32_to_cpu(pFindData->FileNameLength); | |
4523cc30 | 376 | } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 377 | FIND_FILE_STANDARD_INFO *pFindData = |
5bafd765 SF |
378 | (FIND_FILE_STANDARD_INFO *)current_entry; |
379 | filename = &pFindData->FileName[0]; | |
5ddaa683 | 380 | len = pFindData->FileNameLength; |
1da177e4 | 381 | } else { |
b6b38f70 JP |
382 | cFYI(1, "Unknown findfirst level %d", |
383 | cfile->srch_inf.info_level); | |
1da177e4 LT |
384 | } |
385 | ||
4523cc30 SF |
386 | if (filename) { |
387 | if (cfile->srch_inf.unicode) { | |
1da177e4 | 388 | __le16 *ufilename = (__le16 *)filename; |
4523cc30 | 389 | if (len == 2) { |
1da177e4 | 390 | /* check for . */ |
4523cc30 | 391 | if (ufilename[0] == UNICODE_DOT) |
1da177e4 | 392 | rc = 1; |
4523cc30 | 393 | } else if (len == 4) { |
1da177e4 | 394 | /* check for .. */ |
4523cc30 | 395 | if ((ufilename[0] == UNICODE_DOT) |
3870253e | 396 | && (ufilename[1] == UNICODE_DOT)) |
1da177e4 LT |
397 | rc = 2; |
398 | } | |
399 | } else /* ASCII */ { | |
4523cc30 | 400 | if (len == 1) { |
3870253e | 401 | if (filename[0] == '.') |
1da177e4 | 402 | rc = 1; |
4523cc30 | 403 | } else if (len == 2) { |
790fe579 | 404 | if ((filename[0] == '.') && (filename[1] == '.')) |
1da177e4 LT |
405 | rc = 2; |
406 | } | |
407 | } | |
408 | } | |
409 | ||
410 | return rc; | |
411 | } | |
412 | ||
eafe8701 SF |
413 | /* Check if directory that we are searching has changed so we can decide |
414 | whether we can use the cached search results from the previous search */ | |
3870253e | 415 | static int is_dir_changed(struct file *file) |
eafe8701 | 416 | { |
c33f8d32 CH |
417 | struct inode *inode = file->f_path.dentry->d_inode; |
418 | struct cifsInodeInfo *cifsInfo = CIFS_I(inode); | |
eafe8701 | 419 | |
c33f8d32 | 420 | if (cifsInfo->time == 0) |
eafe8701 SF |
421 | return 1; /* directory was changed, perhaps due to unlink */ |
422 | else | |
423 | return 0; | |
424 | ||
425 | } | |
426 | ||
0752f152 SF |
427 | static int cifs_save_resume_key(const char *current_entry, |
428 | struct cifsFileInfo *cifsFile) | |
429 | { | |
430 | int rc = 0; | |
431 | unsigned int len = 0; | |
432 | __u16 level; | |
433 | char *filename; | |
434 | ||
435 | if ((cifsFile == NULL) || (current_entry == NULL)) | |
436 | return -EINVAL; | |
437 | ||
438 | level = cifsFile->srch_inf.info_level; | |
439 | ||
440 | if (level == SMB_FIND_FILE_UNIX) { | |
441 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; | |
442 | ||
443 | filename = &pFindData->FileName[0]; | |
444 | if (cifsFile->srch_inf.unicode) { | |
445 | len = cifs_unicode_bytelen(filename); | |
446 | } else { | |
447 | /* BB should we make this strnlen of PATH_MAX? */ | |
448 | len = strnlen(filename, PATH_MAX); | |
449 | } | |
450 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; | |
451 | } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) { | |
452 | FILE_DIRECTORY_INFO *pFindData = | |
453 | (FILE_DIRECTORY_INFO *)current_entry; | |
454 | filename = &pFindData->FileName[0]; | |
455 | len = le32_to_cpu(pFindData->FileNameLength); | |
456 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
457 | } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { | |
458 | FILE_FULL_DIRECTORY_INFO *pFindData = | |
459 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
460 | filename = &pFindData->FileName[0]; | |
461 | len = le32_to_cpu(pFindData->FileNameLength); | |
462 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
463 | } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { | |
464 | SEARCH_ID_FULL_DIR_INFO *pFindData = | |
465 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
466 | filename = &pFindData->FileName[0]; | |
467 | len = le32_to_cpu(pFindData->FileNameLength); | |
468 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
469 | } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { | |
470 | FILE_BOTH_DIRECTORY_INFO *pFindData = | |
471 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
472 | filename = &pFindData->FileName[0]; | |
473 | len = le32_to_cpu(pFindData->FileNameLength); | |
474 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
475 | } else if (level == SMB_FIND_FILE_INFO_STANDARD) { | |
476 | FIND_FILE_STANDARD_INFO *pFindData = | |
477 | (FIND_FILE_STANDARD_INFO *)current_entry; | |
478 | filename = &pFindData->FileName[0]; | |
479 | /* one byte length, no name conversion */ | |
480 | len = (unsigned int)pFindData->FileNameLength; | |
481 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; | |
482 | } else { | |
b6b38f70 | 483 | cFYI(1, "Unknown findfirst level %d", level); |
0752f152 SF |
484 | return -EINVAL; |
485 | } | |
486 | cifsFile->srch_inf.resume_name_len = len; | |
487 | cifsFile->srch_inf.presume_name = filename; | |
488 | return rc; | |
489 | } | |
490 | ||
1da177e4 LT |
491 | /* find the corresponding entry in the search */ |
492 | /* Note that the SMB server returns search entries for . and .. which | |
493 | complicates logic here if we choose to parse for them and we do not | |
494 | assume that they are located in the findfirst return buffer.*/ | |
495 | /* We start counting in the buffer with entry 2 and increment for every | |
496 | entry (do not increment for . or .. entry) */ | |
497 | static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon, | |
3870253e | 498 | struct file *file, char **ppCurrentEntry, int *num_to_ret) |
1da177e4 LT |
499 | { |
500 | int rc = 0; | |
501 | int pos_in_buf = 0; | |
502 | loff_t first_entry_in_buffer; | |
503 | loff_t index_to_find = file->f_pos; | |
3870253e | 504 | struct cifsFileInfo *cifsFile = file->private_data; |
1da177e4 | 505 | /* check if index in the buffer */ |
50c2f753 | 506 | |
3870253e | 507 | if ((cifsFile == NULL) || (ppCurrentEntry == NULL) || |
eafe8701 | 508 | (num_to_ret == NULL)) |
1da177e4 | 509 | return -ENOENT; |
50c2f753 | 510 | |
1da177e4 | 511 | *ppCurrentEntry = NULL; |
3870253e SF |
512 | first_entry_in_buffer = |
513 | cifsFile->srch_inf.index_of_last_entry - | |
1da177e4 | 514 | cifsFile->srch_inf.entries_in_buffer; |
60808233 SF |
515 | |
516 | /* if first entry in buf is zero then is first buffer | |
517 | in search response data which means it is likely . and .. | |
518 | will be in this buffer, although some servers do not return | |
519 | . and .. for the root of a drive and for those we need | |
520 | to start two entries earlier */ | |
521 | ||
3979877e | 522 | dump_cifs_file_struct(file, "In fce "); |
3870253e SF |
523 | if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) && |
524 | is_dir_changed(file)) || | |
eafe8701 | 525 | (index_to_find < first_entry_in_buffer)) { |
1da177e4 | 526 | /* close and restart search */ |
b6b38f70 | 527 | cFYI(1, "search backing up - close and restart search"); |
ddb4cbfc | 528 | write_lock(&GlobalSMBSeslock); |
77c57ec8 SF |
529 | if (!cifsFile->srch_inf.endOfSearch && |
530 | !cifsFile->invalidHandle) { | |
531 | cifsFile->invalidHandle = true; | |
ddb4cbfc | 532 | write_unlock(&GlobalSMBSeslock); |
77c57ec8 | 533 | CIFSFindClose(xid, pTcon, cifsFile->netfid); |
ddb4cbfc SF |
534 | } else |
535 | write_unlock(&GlobalSMBSeslock); | |
4523cc30 | 536 | if (cifsFile->srch_inf.ntwrk_buf_start) { |
b6b38f70 | 537 | cFYI(1, "freeing SMB ff cache buf on search rewind"); |
4523cc30 | 538 | if (cifsFile->srch_inf.smallBuf) |
d47d7c1a SF |
539 | cifs_small_buf_release(cifsFile->srch_inf. |
540 | ntwrk_buf_start); | |
541 | else | |
542 | cifs_buf_release(cifsFile->srch_inf. | |
543 | ntwrk_buf_start); | |
76c510ad | 544 | cifsFile->srch_inf.ntwrk_buf_start = NULL; |
1da177e4 | 545 | } |
3870253e | 546 | rc = initiate_cifs_search(xid, file); |
4523cc30 | 547 | if (rc) { |
b6b38f70 JP |
548 | cFYI(1, "error %d reinitiating a search on rewind", |
549 | rc); | |
1da177e4 LT |
550 | return rc; |
551 | } | |
a364bc0b | 552 | cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile); |
1da177e4 LT |
553 | } |
554 | ||
3870253e | 555 | while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) && |
4b18f2a9 | 556 | (rc == 0) && !cifsFile->srch_inf.endOfSearch) { |
b6b38f70 | 557 | cFYI(1, "calling findnext2"); |
3870253e | 558 | rc = CIFSFindNext(xid, pTcon, cifsFile->netfid, |
dfb7533b | 559 | &cifsFile->srch_inf); |
a364bc0b | 560 | cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile); |
4523cc30 | 561 | if (rc) |
1da177e4 LT |
562 | return -ENOENT; |
563 | } | |
4523cc30 | 564 | if (index_to_find < cifsFile->srch_inf.index_of_last_entry) { |
1da177e4 LT |
565 | /* we found the buffer that contains the entry */ |
566 | /* scan and find it */ | |
567 | int i; | |
3870253e SF |
568 | char *current_entry; |
569 | char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + | |
1da177e4 LT |
570 | smbCalcSize((struct smb_hdr *) |
571 | cifsFile->srch_inf.ntwrk_buf_start); | |
60808233 SF |
572 | |
573 | current_entry = cifsFile->srch_inf.srch_entries_start; | |
1da177e4 LT |
574 | first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry |
575 | - cifsFile->srch_inf.entries_in_buffer; | |
576 | pos_in_buf = index_to_find - first_entry_in_buffer; | |
b6b38f70 | 577 | cFYI(1, "found entry - pos_in_buf %d", pos_in_buf); |
5bafd765 | 578 | |
ad7a2926 | 579 | for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) { |
dfb7533b | 580 | /* go entry by entry figuring out which is first */ |
3870253e | 581 | current_entry = nxt_dir_entry(current_entry, end_of_smb, |
5bafd765 | 582 | cifsFile->srch_inf.info_level); |
1da177e4 | 583 | } |
790fe579 | 584 | if ((current_entry == NULL) && (i < pos_in_buf)) { |
1da177e4 | 585 | /* BB fixme - check if we should flag this error */ |
b6b38f70 | 586 | cERROR(1, "reached end of buf searching for pos in buf" |
1da177e4 | 587 | " %d index to find %lld rc %d", |
b6b38f70 | 588 | pos_in_buf, index_to_find, rc); |
1da177e4 LT |
589 | } |
590 | rc = 0; | |
591 | *ppCurrentEntry = current_entry; | |
592 | } else { | |
b6b38f70 | 593 | cFYI(1, "index not in buffer - could not findnext into it"); |
1da177e4 LT |
594 | return 0; |
595 | } | |
596 | ||
790fe579 | 597 | if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) { |
b6b38f70 | 598 | cFYI(1, "can not return entries pos_in_buf beyond last"); |
1da177e4 LT |
599 | *num_to_ret = 0; |
600 | } else | |
601 | *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf; | |
1da177e4 LT |
602 | |
603 | return rc; | |
604 | } | |
605 | ||
606 | /* inode num, inode type and filename returned */ | |
607 | static int cifs_get_name_from_search_buf(struct qstr *pqst, | |
608 | char *current_entry, __u16 level, unsigned int unicode, | |
18295796 | 609 | struct cifs_sb_info *cifs_sb, unsigned int max_len, __u64 *pinum) |
1da177e4 LT |
610 | { |
611 | int rc = 0; | |
612 | unsigned int len = 0; | |
3870253e SF |
613 | char *filename; |
614 | struct nls_table *nlt = cifs_sb->local_nls; | |
1da177e4 LT |
615 | |
616 | *pinum = 0; | |
617 | ||
790fe579 | 618 | if (level == SMB_FIND_FILE_UNIX) { |
3870253e | 619 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; |
1da177e4 LT |
620 | |
621 | filename = &pFindData->FileName[0]; | |
790fe579 | 622 | if (unicode) { |
1da177e4 LT |
623 | len = cifs_unicode_bytelen(filename); |
624 | } else { | |
625 | /* BB should we make this strnlen of PATH_MAX? */ | |
626 | len = strnlen(filename, PATH_MAX); | |
627 | } | |
628 | ||
cc0bad75 | 629 | *pinum = le64_to_cpu(pFindData->basic.UniqueId); |
790fe579 | 630 | } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) { |
3870253e | 631 | FILE_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
632 | (FILE_DIRECTORY_INFO *)current_entry; |
633 | filename = &pFindData->FileName[0]; | |
634 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 635 | } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
3870253e | 636 | FILE_FULL_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
637 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
638 | filename = &pFindData->FileName[0]; | |
639 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 640 | } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
3870253e | 641 | SEARCH_ID_FULL_DIR_INFO *pFindData = |
1da177e4 LT |
642 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
643 | filename = &pFindData->FileName[0]; | |
644 | len = le32_to_cpu(pFindData->FileNameLength); | |
85a6dac5 | 645 | *pinum = le64_to_cpu(pFindData->UniqueId); |
790fe579 | 646 | } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
3870253e | 647 | FILE_BOTH_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
648 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
649 | filename = &pFindData->FileName[0]; | |
650 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 651 | } else if (level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 652 | FIND_FILE_STANDARD_INFO *pFindData = |
5bafd765 SF |
653 | (FIND_FILE_STANDARD_INFO *)current_entry; |
654 | filename = &pFindData->FileName[0]; | |
655 | /* one byte length, no name conversion */ | |
656 | len = (unsigned int)pFindData->FileNameLength; | |
1da177e4 | 657 | } else { |
b6b38f70 | 658 | cFYI(1, "Unknown findfirst level %d", level); |
1da177e4 LT |
659 | return -EINVAL; |
660 | } | |
5bafd765 | 661 | |
790fe579 | 662 | if (len > max_len) { |
b6b38f70 | 663 | cERROR(1, "bad search response length %d past smb end", len); |
5bafd765 SF |
664 | return -EINVAL; |
665 | } | |
666 | ||
790fe579 | 667 | if (unicode) { |
f5884166 JL |
668 | pqst->len = cifs_from_ucs2((char *) pqst->name, |
669 | (__le16 *) filename, | |
18295796 JL |
670 | UNICODE_NAME_MAX, |
671 | min(len, max_len), nlt, | |
f5884166 JL |
672 | cifs_sb->mnt_cifs_flags & |
673 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
f12f98db | 674 | pqst->len -= nls_nullsize(nlt); |
1da177e4 LT |
675 | } else { |
676 | pqst->name = filename; | |
677 | pqst->len = len; | |
678 | } | |
1da177e4 LT |
679 | return rc; |
680 | } | |
681 | ||
18295796 JL |
682 | static int cifs_filldir(char *pfindEntry, struct file *file, filldir_t filldir, |
683 | void *direntry, char *scratch_buf, unsigned int max_len) | |
1da177e4 LT |
684 | { |
685 | int rc = 0; | |
686 | struct qstr qstring; | |
3870253e | 687 | struct cifsFileInfo *pCifsF; |
0b8f18e3 | 688 | u64 inum; |
cc0bad75 | 689 | ino_t ino; |
0b8f18e3 | 690 | struct super_block *sb; |
3870253e | 691 | struct cifs_sb_info *cifs_sb; |
1da177e4 | 692 | struct dentry *tmp_dentry; |
cc0bad75 | 693 | struct cifs_fattr fattr; |
1da177e4 LT |
694 | |
695 | /* get filename and len into qstring */ | |
696 | /* get dentry */ | |
697 | /* decide whether to create and populate ionde */ | |
790fe579 | 698 | if ((direntry == NULL) || (file == NULL)) |
1da177e4 LT |
699 | return -EINVAL; |
700 | ||
701 | pCifsF = file->private_data; | |
50c2f753 | 702 | |
790fe579 | 703 | if ((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL)) |
1da177e4 LT |
704 | return -ENOENT; |
705 | ||
3870253e | 706 | rc = cifs_entry_is_dot(pfindEntry, pCifsF); |
60808233 | 707 | /* skip . and .. since we added them first */ |
790fe579 | 708 | if (rc != 0) |
60808233 SF |
709 | return 0; |
710 | ||
0b8f18e3 JL |
711 | sb = file->f_path.dentry->d_sb; |
712 | cifs_sb = CIFS_SB(sb); | |
1da177e4 LT |
713 | |
714 | qstring.name = scratch_buf; | |
3870253e | 715 | rc = cifs_get_name_from_search_buf(&qstring, pfindEntry, |
1da177e4 | 716 | pCifsF->srch_inf.info_level, |
3870253e | 717 | pCifsF->srch_inf.unicode, cifs_sb, |
0b8f18e3 | 718 | max_len, &inum /* returned */); |
1da177e4 | 719 | |
790fe579 | 720 | if (rc) |
1da177e4 LT |
721 | return rc; |
722 | ||
0b8f18e3 | 723 | if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) |
cc0bad75 JL |
724 | cifs_unix_basic_to_fattr(&fattr, |
725 | &((FILE_UNIX_INFO *) pfindEntry)->basic, | |
726 | cifs_sb); | |
0b8f18e3 JL |
727 | else if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) |
728 | cifs_std_info_to_fattr(&fattr, (FIND_FILE_STANDARD_INFO *) | |
729 | pfindEntry, cifs_sb); | |
730 | else | |
731 | cifs_dir_info_to_fattr(&fattr, (FILE_DIRECTORY_INFO *) | |
732 | pfindEntry, cifs_sb); | |
b835bebe | 733 | |
ec06aedd | 734 | if (inum && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
0b8f18e3 | 735 | fattr.cf_uniqueid = inum; |
ec06aedd | 736 | } else { |
0b8f18e3 | 737 | fattr.cf_uniqueid = iunique(sb, ROOT_I); |
ec06aedd JL |
738 | cifs_autodisable_serverino(cifs_sb); |
739 | } | |
50c2f753 | 740 | |
0b8f18e3 JL |
741 | ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid); |
742 | tmp_dentry = cifs_readdir_lookup(file->f_dentry, &qstring, &fattr); | |
3870253e SF |
743 | |
744 | rc = filldir(direntry, qstring.name, qstring.len, file->f_pos, | |
0b8f18e3 JL |
745 | ino, fattr.cf_dtype); |
746 | ||
747 | /* | |
748 | * we can not return filldir errors to the caller since they are | |
749 | * "normal" when the stat blocksize is too small - we return remapped | |
750 | * error instead | |
751 | * | |
752 | * FIXME: This looks bogus. filldir returns -EOVERFLOW in the above | |
753 | * case already. Why should we be clobbering other errors from it? | |
754 | */ | |
790fe579 | 755 | if (rc) { |
b6b38f70 | 756 | cFYI(1, "filldir rc = %d", rc); |
7ca85ba7 | 757 | rc = -EOVERFLOW; |
1da177e4 | 758 | } |
1da177e4 LT |
759 | dput(tmp_dentry); |
760 | return rc; | |
761 | } | |
762 | ||
1da177e4 LT |
763 | |
764 | int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) | |
765 | { | |
766 | int rc = 0; | |
3870253e | 767 | int xid, i; |
1da177e4 LT |
768 | struct cifs_sb_info *cifs_sb; |
769 | struct cifsTconInfo *pTcon; | |
770 | struct cifsFileInfo *cifsFile = NULL; | |
3870253e | 771 | char *current_entry; |
1da177e4 | 772 | int num_to_fill = 0; |
3870253e | 773 | char *tmp_buf = NULL; |
50c2f753 | 774 | char *end_of_smb; |
18295796 | 775 | unsigned int max_len; |
1da177e4 LT |
776 | |
777 | xid = GetXid(); | |
778 | ||
e6a00296 | 779 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 | 780 | pTcon = cifs_sb->tcon; |
790fe579 | 781 | if (pTcon == NULL) |
1da177e4 LT |
782 | return -EINVAL; |
783 | ||
1da177e4 LT |
784 | switch ((int) file->f_pos) { |
785 | case 0: | |
60808233 | 786 | if (filldir(direntry, ".", 1, file->f_pos, |
e6a00296 | 787 | file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) { |
b6b38f70 | 788 | cERROR(1, "Filldir for current dir failed"); |
1da177e4 LT |
789 | rc = -ENOMEM; |
790 | break; | |
791 | } | |
60808233 | 792 | file->f_pos++; |
1da177e4 | 793 | case 1: |
60808233 | 794 | if (filldir(direntry, "..", 2, file->f_pos, |
e6a00296 | 795 | file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) { |
b6b38f70 | 796 | cERROR(1, "Filldir for parent dir failed"); |
1da177e4 LT |
797 | rc = -ENOMEM; |
798 | break; | |
799 | } | |
60808233 SF |
800 | file->f_pos++; |
801 | default: | |
3870253e SF |
802 | /* 1) If search is active, |
803 | is in current search buffer? | |
1da177e4 LT |
804 | if it before then restart search |
805 | if after then keep searching till find it */ | |
806 | ||
790fe579 | 807 | if (file->private_data == NULL) { |
3870253e | 808 | rc = initiate_cifs_search(xid, file); |
b6b38f70 | 809 | cFYI(1, "initiate cifs search rc %d", rc); |
790fe579 | 810 | if (rc) { |
1da177e4 LT |
811 | FreeXid(xid); |
812 | return rc; | |
813 | } | |
814 | } | |
790fe579 | 815 | if (file->private_data == NULL) { |
1da177e4 LT |
816 | rc = -EINVAL; |
817 | FreeXid(xid); | |
818 | return rc; | |
819 | } | |
820 | cifsFile = file->private_data; | |
821 | if (cifsFile->srch_inf.endOfSearch) { | |
790fe579 | 822 | if (cifsFile->srch_inf.emptyDir) { |
b6b38f70 | 823 | cFYI(1, "End of search, empty dir"); |
1da177e4 LT |
824 | rc = 0; |
825 | break; | |
826 | } | |
827 | } /* else { | |
4b18f2a9 | 828 | cifsFile->invalidHandle = true; |
1da177e4 | 829 | CIFSFindClose(xid, pTcon, cifsFile->netfid); |
aaa9bbe0 | 830 | } */ |
1da177e4 | 831 | |
3870253e SF |
832 | rc = find_cifs_entry(xid, pTcon, file, |
833 | ¤t_entry, &num_to_fill); | |
790fe579 | 834 | if (rc) { |
b6b38f70 | 835 | cFYI(1, "fce error %d", rc); |
1da177e4 LT |
836 | goto rddir2_exit; |
837 | } else if (current_entry != NULL) { | |
b6b38f70 | 838 | cFYI(1, "entry %lld found", file->f_pos); |
1da177e4 | 839 | } else { |
b6b38f70 | 840 | cFYI(1, "could not find entry"); |
1da177e4 LT |
841 | goto rddir2_exit; |
842 | } | |
b6b38f70 JP |
843 | cFYI(1, "loop through %d times filling dir for net buf %p", |
844 | num_to_fill, cifsFile->srch_inf.ntwrk_buf_start); | |
5bafd765 SF |
845 | max_len = smbCalcSize((struct smb_hdr *) |
846 | cifsFile->srch_inf.ntwrk_buf_start); | |
847 | end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len; | |
848 | ||
f5884166 | 849 | tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL); |
f55fdcca KV |
850 | if (tmp_buf == NULL) { |
851 | rc = -ENOMEM; | |
852 | break; | |
853 | } | |
854 | ||
790fe579 SF |
855 | for (i = 0; (i < num_to_fill) && (rc == 0); i++) { |
856 | if (current_entry == NULL) { | |
1da177e4 | 857 | /* evaluate whether this case is an error */ |
b6b38f70 JP |
858 | cERROR(1, "past SMB end, num to fill %d i %d", |
859 | num_to_fill, i); | |
1da177e4 LT |
860 | break; |
861 | } | |
60808233 SF |
862 | /* if buggy server returns . and .. late do |
863 | we want to check for that here? */ | |
5bafd765 SF |
864 | rc = cifs_filldir(current_entry, file, |
865 | filldir, direntry, tmp_buf, max_len); | |
790fe579 | 866 | if (rc == -EOVERFLOW) { |
7ca85ba7 SF |
867 | rc = 0; |
868 | break; | |
869 | } | |
870 | ||
1da177e4 | 871 | file->f_pos++; |
790fe579 | 872 | if (file->f_pos == |
3979877e | 873 | cifsFile->srch_inf.index_of_last_entry) { |
b6b38f70 JP |
874 | cFYI(1, "last entry in buf at pos %lld %s", |
875 | file->f_pos, tmp_buf); | |
790fe579 | 876 | cifs_save_resume_key(current_entry, cifsFile); |
1da177e4 | 877 | break; |
790fe579 SF |
878 | } else |
879 | current_entry = | |
5bafd765 SF |
880 | nxt_dir_entry(current_entry, end_of_smb, |
881 | cifsFile->srch_inf.info_level); | |
1da177e4 LT |
882 | } |
883 | kfree(tmp_buf); | |
884 | break; | |
885 | } /* end switch */ | |
886 | ||
887 | rddir2_exit: | |
1da177e4 LT |
888 | FreeXid(xid); |
889 | return rc; | |
890 | } |