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Commit | Line | Data |
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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 | ||
ba00ba64 JL |
231 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
232 | if (cifs_sb == NULL) | |
233 | return -EINVAL; | |
234 | ||
235 | if (file->private_data == NULL) | |
3870253e SF |
236 | file->private_data = |
237 | kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); | |
1da177e4 | 238 | |
4523cc30 | 239 | if (file->private_data == NULL) |
1da177e4 | 240 | return -ENOMEM; |
1da177e4 | 241 | cifsFile = file->private_data; |
4b18f2a9 SF |
242 | cifsFile->invalidHandle = true; |
243 | cifsFile->srch_inf.endOfSearch = false; | |
ba00ba64 JL |
244 | cifsFile->tcon = cifs_sb->tcon; |
245 | pTcon = cifsFile->tcon; | |
4523cc30 | 246 | if (pTcon == NULL) |
1da177e4 LT |
247 | return -EINVAL; |
248 | ||
e6a00296 | 249 | full_path = build_path_from_dentry(file->f_path.dentry); |
1da177e4 | 250 | |
ad7a2926 | 251 | if (full_path == NULL) |
1da177e4 | 252 | return -ENOMEM; |
1da177e4 | 253 | |
b6b38f70 | 254 | cFYI(1, "Full path: %s start at: %lld", full_path, file->f_pos); |
1da177e4 | 255 | |
75cf6bdc | 256 | ffirst_retry: |
1da177e4 | 257 | /* test for Unix extensions */ |
c18c842b SF |
258 | /* but now check for them on the share/mount not on the SMB session */ |
259 | /* if (pTcon->ses->capabilities & CAP_UNIX) { */ | |
ad7a2926 | 260 | if (pTcon->unix_ext) |
5bafd765 | 261 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX; |
ad7a2926 | 262 | else if ((pTcon->ses->capabilities & |
5bafd765 SF |
263 | (CAP_NT_SMBS | CAP_NT_FIND)) == 0) { |
264 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD; | |
1da177e4 LT |
265 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
266 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; | |
267 | } else /* not srvinos - BB fixme add check for backlevel? */ { | |
268 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
269 | } | |
270 | ||
3870253e | 271 | rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls, |
737b758c | 272 | &cifsFile->netfid, &cifsFile->srch_inf, |
3870253e | 273 | cifs_sb->mnt_cifs_flags & |
eafe8701 | 274 | CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); |
4523cc30 | 275 | if (rc == 0) |
4b18f2a9 | 276 | cifsFile->invalidHandle = false; |
e836f015 | 277 | /* BB add following call to handle readdir on new NTFS symlink errors |
0e0d2cf3 SF |
278 | else if STATUS_STOPPED_ON_SYMLINK |
279 | call get_symlink_reparse_path and retry with new path */ | |
280 | else if ((rc == -EOPNOTSUPP) && | |
75cf6bdc SF |
281 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
282 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; | |
283 | goto ffirst_retry; | |
284 | } | |
1da177e4 LT |
285 | kfree(full_path); |
286 | return rc; | |
287 | } | |
288 | ||
289 | /* return length of unicode string in bytes */ | |
290 | static int cifs_unicode_bytelen(char *str) | |
291 | { | |
292 | int len; | |
63d2583f | 293 | __le16 *ustr = (__le16 *)str; |
1da177e4 | 294 | |
3870253e | 295 | for (len = 0; len <= PATH_MAX; len++) { |
4523cc30 | 296 | if (ustr[len] == 0) |
1da177e4 LT |
297 | return len << 1; |
298 | } | |
b6b38f70 | 299 | cFYI(1, "Unicode string longer than PATH_MAX found"); |
1da177e4 LT |
300 | return len << 1; |
301 | } | |
302 | ||
5bafd765 | 303 | static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level) |
1da177e4 | 304 | { |
3870253e | 305 | char *new_entry; |
ad7a2926 | 306 | FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry; |
1da177e4 | 307 | |
4523cc30 | 308 | if (level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 309 | FIND_FILE_STANDARD_INFO *pfData; |
5bafd765 SF |
310 | pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo; |
311 | ||
312 | new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) + | |
313 | pfData->FileNameLength; | |
314 | } else | |
315 | new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset); | |
b6b38f70 | 316 | cFYI(1, "new entry %p old entry %p", new_entry, old_entry); |
1da177e4 | 317 | /* validate that new_entry is not past end of SMB */ |
4523cc30 | 318 | if (new_entry >= end_of_smb) { |
b6b38f70 JP |
319 | cERROR(1, "search entry %p began after end of SMB %p old entry %p", |
320 | new_entry, end_of_smb, old_entry); | |
1da177e4 | 321 | return NULL; |
4523cc30 | 322 | } else if (((level == SMB_FIND_FILE_INFO_STANDARD) && |
3870253e SF |
323 | (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) |
324 | || ((level != SMB_FIND_FILE_INFO_STANDARD) && | |
5bafd765 | 325 | (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) { |
b6b38f70 JP |
326 | cERROR(1, "search entry %p extends after end of SMB %p", |
327 | new_entry, end_of_smb); | |
09d1db5c | 328 | return NULL; |
3870253e | 329 | } else |
1da177e4 LT |
330 | return new_entry; |
331 | ||
332 | } | |
333 | ||
334 | #define UNICODE_DOT cpu_to_le16(0x2e) | |
335 | ||
336 | /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */ | |
337 | static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile) | |
338 | { | |
339 | int rc = 0; | |
3870253e SF |
340 | char *filename = NULL; |
341 | int len = 0; | |
1da177e4 | 342 | |
4523cc30 | 343 | if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) { |
ad7a2926 | 344 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; |
1da177e4 | 345 | filename = &pFindData->FileName[0]; |
4523cc30 | 346 | if (cfile->srch_inf.unicode) { |
1da177e4 LT |
347 | len = cifs_unicode_bytelen(filename); |
348 | } else { | |
349 | /* BB should we make this strnlen of PATH_MAX? */ | |
350 | len = strnlen(filename, 5); | |
351 | } | |
4523cc30 | 352 | } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) { |
ad7a2926 | 353 | FILE_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
354 | (FILE_DIRECTORY_INFO *)current_entry; |
355 | filename = &pFindData->FileName[0]; | |
356 | len = le32_to_cpu(pFindData->FileNameLength); | |
3870253e | 357 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 358 | SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
ad7a2926 | 359 | FILE_FULL_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
360 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
361 | filename = &pFindData->FileName[0]; | |
362 | len = le32_to_cpu(pFindData->FileNameLength); | |
4523cc30 | 363 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 364 | SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
ad7a2926 | 365 | SEARCH_ID_FULL_DIR_INFO *pFindData = |
1da177e4 LT |
366 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
367 | filename = &pFindData->FileName[0]; | |
368 | len = le32_to_cpu(pFindData->FileNameLength); | |
3870253e | 369 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 370 | SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
ad7a2926 | 371 | FILE_BOTH_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
372 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
373 | filename = &pFindData->FileName[0]; | |
374 | len = le32_to_cpu(pFindData->FileNameLength); | |
4523cc30 | 375 | } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 376 | FIND_FILE_STANDARD_INFO *pFindData = |
5bafd765 SF |
377 | (FIND_FILE_STANDARD_INFO *)current_entry; |
378 | filename = &pFindData->FileName[0]; | |
5ddaa683 | 379 | len = pFindData->FileNameLength; |
1da177e4 | 380 | } else { |
b6b38f70 JP |
381 | cFYI(1, "Unknown findfirst level %d", |
382 | cfile->srch_inf.info_level); | |
1da177e4 LT |
383 | } |
384 | ||
4523cc30 SF |
385 | if (filename) { |
386 | if (cfile->srch_inf.unicode) { | |
1da177e4 | 387 | __le16 *ufilename = (__le16 *)filename; |
4523cc30 | 388 | if (len == 2) { |
1da177e4 | 389 | /* check for . */ |
4523cc30 | 390 | if (ufilename[0] == UNICODE_DOT) |
1da177e4 | 391 | rc = 1; |
4523cc30 | 392 | } else if (len == 4) { |
1da177e4 | 393 | /* check for .. */ |
4523cc30 | 394 | if ((ufilename[0] == UNICODE_DOT) |
3870253e | 395 | && (ufilename[1] == UNICODE_DOT)) |
1da177e4 LT |
396 | rc = 2; |
397 | } | |
398 | } else /* ASCII */ { | |
4523cc30 | 399 | if (len == 1) { |
3870253e | 400 | if (filename[0] == '.') |
1da177e4 | 401 | rc = 1; |
4523cc30 | 402 | } else if (len == 2) { |
790fe579 | 403 | if ((filename[0] == '.') && (filename[1] == '.')) |
1da177e4 LT |
404 | rc = 2; |
405 | } | |
406 | } | |
407 | } | |
408 | ||
409 | return rc; | |
410 | } | |
411 | ||
eafe8701 SF |
412 | /* Check if directory that we are searching has changed so we can decide |
413 | whether we can use the cached search results from the previous search */ | |
3870253e | 414 | static int is_dir_changed(struct file *file) |
eafe8701 | 415 | { |
c33f8d32 CH |
416 | struct inode *inode = file->f_path.dentry->d_inode; |
417 | struct cifsInodeInfo *cifsInfo = CIFS_I(inode); | |
eafe8701 | 418 | |
c33f8d32 | 419 | if (cifsInfo->time == 0) |
eafe8701 SF |
420 | return 1; /* directory was changed, perhaps due to unlink */ |
421 | else | |
422 | return 0; | |
423 | ||
424 | } | |
425 | ||
0752f152 SF |
426 | static int cifs_save_resume_key(const char *current_entry, |
427 | struct cifsFileInfo *cifsFile) | |
428 | { | |
429 | int rc = 0; | |
430 | unsigned int len = 0; | |
431 | __u16 level; | |
432 | char *filename; | |
433 | ||
434 | if ((cifsFile == NULL) || (current_entry == NULL)) | |
435 | return -EINVAL; | |
436 | ||
437 | level = cifsFile->srch_inf.info_level; | |
438 | ||
439 | if (level == SMB_FIND_FILE_UNIX) { | |
440 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; | |
441 | ||
442 | filename = &pFindData->FileName[0]; | |
443 | if (cifsFile->srch_inf.unicode) { | |
444 | len = cifs_unicode_bytelen(filename); | |
445 | } else { | |
446 | /* BB should we make this strnlen of PATH_MAX? */ | |
447 | len = strnlen(filename, PATH_MAX); | |
448 | } | |
449 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; | |
450 | } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) { | |
451 | FILE_DIRECTORY_INFO *pFindData = | |
452 | (FILE_DIRECTORY_INFO *)current_entry; | |
453 | filename = &pFindData->FileName[0]; | |
454 | len = le32_to_cpu(pFindData->FileNameLength); | |
455 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
456 | } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { | |
457 | FILE_FULL_DIRECTORY_INFO *pFindData = | |
458 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
459 | filename = &pFindData->FileName[0]; | |
460 | len = le32_to_cpu(pFindData->FileNameLength); | |
461 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
462 | } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { | |
463 | SEARCH_ID_FULL_DIR_INFO *pFindData = | |
464 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
465 | filename = &pFindData->FileName[0]; | |
466 | len = le32_to_cpu(pFindData->FileNameLength); | |
467 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
468 | } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { | |
469 | FILE_BOTH_DIRECTORY_INFO *pFindData = | |
470 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
471 | filename = &pFindData->FileName[0]; | |
472 | len = le32_to_cpu(pFindData->FileNameLength); | |
473 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
474 | } else if (level == SMB_FIND_FILE_INFO_STANDARD) { | |
475 | FIND_FILE_STANDARD_INFO *pFindData = | |
476 | (FIND_FILE_STANDARD_INFO *)current_entry; | |
477 | filename = &pFindData->FileName[0]; | |
478 | /* one byte length, no name conversion */ | |
479 | len = (unsigned int)pFindData->FileNameLength; | |
480 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; | |
481 | } else { | |
b6b38f70 | 482 | cFYI(1, "Unknown findfirst level %d", level); |
0752f152 SF |
483 | return -EINVAL; |
484 | } | |
485 | cifsFile->srch_inf.resume_name_len = len; | |
486 | cifsFile->srch_inf.presume_name = filename; | |
487 | return rc; | |
488 | } | |
489 | ||
1da177e4 LT |
490 | /* find the corresponding entry in the search */ |
491 | /* Note that the SMB server returns search entries for . and .. which | |
492 | complicates logic here if we choose to parse for them and we do not | |
493 | assume that they are located in the findfirst return buffer.*/ | |
494 | /* We start counting in the buffer with entry 2 and increment for every | |
495 | entry (do not increment for . or .. entry) */ | |
496 | static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon, | |
3870253e | 497 | struct file *file, char **ppCurrentEntry, int *num_to_ret) |
1da177e4 LT |
498 | { |
499 | int rc = 0; | |
500 | int pos_in_buf = 0; | |
501 | loff_t first_entry_in_buffer; | |
502 | loff_t index_to_find = file->f_pos; | |
3870253e | 503 | struct cifsFileInfo *cifsFile = file->private_data; |
1da177e4 | 504 | /* check if index in the buffer */ |
50c2f753 | 505 | |
3870253e | 506 | if ((cifsFile == NULL) || (ppCurrentEntry == NULL) || |
eafe8701 | 507 | (num_to_ret == NULL)) |
1da177e4 | 508 | return -ENOENT; |
50c2f753 | 509 | |
1da177e4 | 510 | *ppCurrentEntry = NULL; |
3870253e SF |
511 | first_entry_in_buffer = |
512 | cifsFile->srch_inf.index_of_last_entry - | |
1da177e4 | 513 | cifsFile->srch_inf.entries_in_buffer; |
60808233 SF |
514 | |
515 | /* if first entry in buf is zero then is first buffer | |
516 | in search response data which means it is likely . and .. | |
517 | will be in this buffer, although some servers do not return | |
518 | . and .. for the root of a drive and for those we need | |
519 | to start two entries earlier */ | |
520 | ||
3979877e | 521 | dump_cifs_file_struct(file, "In fce "); |
3870253e SF |
522 | if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) && |
523 | is_dir_changed(file)) || | |
eafe8701 | 524 | (index_to_find < first_entry_in_buffer)) { |
1da177e4 | 525 | /* close and restart search */ |
b6b38f70 | 526 | cFYI(1, "search backing up - close and restart search"); |
ddb4cbfc | 527 | write_lock(&GlobalSMBSeslock); |
77c57ec8 SF |
528 | if (!cifsFile->srch_inf.endOfSearch && |
529 | !cifsFile->invalidHandle) { | |
530 | cifsFile->invalidHandle = true; | |
ddb4cbfc | 531 | write_unlock(&GlobalSMBSeslock); |
77c57ec8 | 532 | CIFSFindClose(xid, pTcon, cifsFile->netfid); |
ddb4cbfc SF |
533 | } else |
534 | write_unlock(&GlobalSMBSeslock); | |
4523cc30 | 535 | if (cifsFile->srch_inf.ntwrk_buf_start) { |
b6b38f70 | 536 | cFYI(1, "freeing SMB ff cache buf on search rewind"); |
4523cc30 | 537 | if (cifsFile->srch_inf.smallBuf) |
d47d7c1a SF |
538 | cifs_small_buf_release(cifsFile->srch_inf. |
539 | ntwrk_buf_start); | |
540 | else | |
541 | cifs_buf_release(cifsFile->srch_inf. | |
542 | ntwrk_buf_start); | |
76c510ad | 543 | cifsFile->srch_inf.ntwrk_buf_start = NULL; |
1da177e4 | 544 | } |
3870253e | 545 | rc = initiate_cifs_search(xid, file); |
4523cc30 | 546 | if (rc) { |
b6b38f70 JP |
547 | cFYI(1, "error %d reinitiating a search on rewind", |
548 | rc); | |
1da177e4 LT |
549 | return rc; |
550 | } | |
a364bc0b | 551 | cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile); |
1da177e4 LT |
552 | } |
553 | ||
3870253e | 554 | while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) && |
4b18f2a9 | 555 | (rc == 0) && !cifsFile->srch_inf.endOfSearch) { |
b6b38f70 | 556 | cFYI(1, "calling findnext2"); |
3870253e | 557 | rc = CIFSFindNext(xid, pTcon, cifsFile->netfid, |
dfb7533b | 558 | &cifsFile->srch_inf); |
a364bc0b | 559 | cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile); |
4523cc30 | 560 | if (rc) |
1da177e4 LT |
561 | return -ENOENT; |
562 | } | |
4523cc30 | 563 | if (index_to_find < cifsFile->srch_inf.index_of_last_entry) { |
1da177e4 LT |
564 | /* we found the buffer that contains the entry */ |
565 | /* scan and find it */ | |
566 | int i; | |
3870253e SF |
567 | char *current_entry; |
568 | char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + | |
1da177e4 LT |
569 | smbCalcSize((struct smb_hdr *) |
570 | cifsFile->srch_inf.ntwrk_buf_start); | |
60808233 SF |
571 | |
572 | current_entry = cifsFile->srch_inf.srch_entries_start; | |
1da177e4 LT |
573 | first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry |
574 | - cifsFile->srch_inf.entries_in_buffer; | |
575 | pos_in_buf = index_to_find - first_entry_in_buffer; | |
b6b38f70 | 576 | cFYI(1, "found entry - pos_in_buf %d", pos_in_buf); |
5bafd765 | 577 | |
ad7a2926 | 578 | for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) { |
dfb7533b | 579 | /* go entry by entry figuring out which is first */ |
3870253e | 580 | current_entry = nxt_dir_entry(current_entry, end_of_smb, |
5bafd765 | 581 | cifsFile->srch_inf.info_level); |
1da177e4 | 582 | } |
790fe579 | 583 | if ((current_entry == NULL) && (i < pos_in_buf)) { |
1da177e4 | 584 | /* BB fixme - check if we should flag this error */ |
b6b38f70 | 585 | cERROR(1, "reached end of buf searching for pos in buf" |
1da177e4 | 586 | " %d index to find %lld rc %d", |
b6b38f70 | 587 | pos_in_buf, index_to_find, rc); |
1da177e4 LT |
588 | } |
589 | rc = 0; | |
590 | *ppCurrentEntry = current_entry; | |
591 | } else { | |
b6b38f70 | 592 | cFYI(1, "index not in buffer - could not findnext into it"); |
1da177e4 LT |
593 | return 0; |
594 | } | |
595 | ||
790fe579 | 596 | if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) { |
b6b38f70 | 597 | cFYI(1, "can not return entries pos_in_buf beyond last"); |
1da177e4 LT |
598 | *num_to_ret = 0; |
599 | } else | |
600 | *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf; | |
1da177e4 LT |
601 | |
602 | return rc; | |
603 | } | |
604 | ||
605 | /* inode num, inode type and filename returned */ | |
606 | static int cifs_get_name_from_search_buf(struct qstr *pqst, | |
607 | char *current_entry, __u16 level, unsigned int unicode, | |
18295796 | 608 | struct cifs_sb_info *cifs_sb, unsigned int max_len, __u64 *pinum) |
1da177e4 LT |
609 | { |
610 | int rc = 0; | |
611 | unsigned int len = 0; | |
3870253e SF |
612 | char *filename; |
613 | struct nls_table *nlt = cifs_sb->local_nls; | |
1da177e4 LT |
614 | |
615 | *pinum = 0; | |
616 | ||
790fe579 | 617 | if (level == SMB_FIND_FILE_UNIX) { |
3870253e | 618 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; |
1da177e4 LT |
619 | |
620 | filename = &pFindData->FileName[0]; | |
790fe579 | 621 | if (unicode) { |
1da177e4 LT |
622 | len = cifs_unicode_bytelen(filename); |
623 | } else { | |
624 | /* BB should we make this strnlen of PATH_MAX? */ | |
625 | len = strnlen(filename, PATH_MAX); | |
626 | } | |
627 | ||
cc0bad75 | 628 | *pinum = le64_to_cpu(pFindData->basic.UniqueId); |
790fe579 | 629 | } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) { |
3870253e | 630 | FILE_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
631 | (FILE_DIRECTORY_INFO *)current_entry; |
632 | filename = &pFindData->FileName[0]; | |
633 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 634 | } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
3870253e | 635 | FILE_FULL_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
636 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
637 | filename = &pFindData->FileName[0]; | |
638 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 639 | } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
3870253e | 640 | SEARCH_ID_FULL_DIR_INFO *pFindData = |
1da177e4 LT |
641 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
642 | filename = &pFindData->FileName[0]; | |
643 | len = le32_to_cpu(pFindData->FileNameLength); | |
85a6dac5 | 644 | *pinum = le64_to_cpu(pFindData->UniqueId); |
790fe579 | 645 | } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
3870253e | 646 | FILE_BOTH_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
647 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
648 | filename = &pFindData->FileName[0]; | |
649 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 650 | } else if (level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 651 | FIND_FILE_STANDARD_INFO *pFindData = |
5bafd765 SF |
652 | (FIND_FILE_STANDARD_INFO *)current_entry; |
653 | filename = &pFindData->FileName[0]; | |
654 | /* one byte length, no name conversion */ | |
655 | len = (unsigned int)pFindData->FileNameLength; | |
1da177e4 | 656 | } else { |
b6b38f70 | 657 | cFYI(1, "Unknown findfirst level %d", level); |
1da177e4 LT |
658 | return -EINVAL; |
659 | } | |
5bafd765 | 660 | |
790fe579 | 661 | if (len > max_len) { |
b6b38f70 | 662 | cERROR(1, "bad search response length %d past smb end", len); |
5bafd765 SF |
663 | return -EINVAL; |
664 | } | |
665 | ||
790fe579 | 666 | if (unicode) { |
f5884166 JL |
667 | pqst->len = cifs_from_ucs2((char *) pqst->name, |
668 | (__le16 *) filename, | |
18295796 JL |
669 | UNICODE_NAME_MAX, |
670 | min(len, max_len), nlt, | |
f5884166 JL |
671 | cifs_sb->mnt_cifs_flags & |
672 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
f12f98db | 673 | pqst->len -= nls_nullsize(nlt); |
1da177e4 LT |
674 | } else { |
675 | pqst->name = filename; | |
676 | pqst->len = len; | |
677 | } | |
1da177e4 LT |
678 | return rc; |
679 | } | |
680 | ||
18295796 JL |
681 | static int cifs_filldir(char *pfindEntry, struct file *file, filldir_t filldir, |
682 | void *direntry, char *scratch_buf, unsigned int max_len) | |
1da177e4 LT |
683 | { |
684 | int rc = 0; | |
685 | struct qstr qstring; | |
3870253e | 686 | struct cifsFileInfo *pCifsF; |
0b8f18e3 | 687 | u64 inum; |
cc0bad75 | 688 | ino_t ino; |
0b8f18e3 | 689 | struct super_block *sb; |
3870253e | 690 | struct cifs_sb_info *cifs_sb; |
1da177e4 | 691 | struct dentry *tmp_dentry; |
cc0bad75 | 692 | struct cifs_fattr fattr; |
1da177e4 LT |
693 | |
694 | /* get filename and len into qstring */ | |
695 | /* get dentry */ | |
696 | /* decide whether to create and populate ionde */ | |
790fe579 | 697 | if ((direntry == NULL) || (file == NULL)) |
1da177e4 LT |
698 | return -EINVAL; |
699 | ||
700 | pCifsF = file->private_data; | |
50c2f753 | 701 | |
790fe579 | 702 | if ((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL)) |
1da177e4 LT |
703 | return -ENOENT; |
704 | ||
3870253e | 705 | rc = cifs_entry_is_dot(pfindEntry, pCifsF); |
60808233 | 706 | /* skip . and .. since we added them first */ |
790fe579 | 707 | if (rc != 0) |
60808233 SF |
708 | return 0; |
709 | ||
0b8f18e3 JL |
710 | sb = file->f_path.dentry->d_sb; |
711 | cifs_sb = CIFS_SB(sb); | |
1da177e4 LT |
712 | |
713 | qstring.name = scratch_buf; | |
3870253e | 714 | rc = cifs_get_name_from_search_buf(&qstring, pfindEntry, |
1da177e4 | 715 | pCifsF->srch_inf.info_level, |
3870253e | 716 | pCifsF->srch_inf.unicode, cifs_sb, |
0b8f18e3 | 717 | max_len, &inum /* returned */); |
1da177e4 | 718 | |
790fe579 | 719 | if (rc) |
1da177e4 LT |
720 | return rc; |
721 | ||
0b8f18e3 | 722 | if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) |
cc0bad75 JL |
723 | cifs_unix_basic_to_fattr(&fattr, |
724 | &((FILE_UNIX_INFO *) pfindEntry)->basic, | |
725 | cifs_sb); | |
0b8f18e3 JL |
726 | else if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) |
727 | cifs_std_info_to_fattr(&fattr, (FIND_FILE_STANDARD_INFO *) | |
728 | pfindEntry, cifs_sb); | |
729 | else | |
730 | cifs_dir_info_to_fattr(&fattr, (FILE_DIRECTORY_INFO *) | |
731 | pfindEntry, cifs_sb); | |
b835bebe | 732 | |
ec06aedd | 733 | if (inum && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
0b8f18e3 | 734 | fattr.cf_uniqueid = inum; |
ec06aedd | 735 | } else { |
0b8f18e3 | 736 | fattr.cf_uniqueid = iunique(sb, ROOT_I); |
ec06aedd JL |
737 | cifs_autodisable_serverino(cifs_sb); |
738 | } | |
50c2f753 | 739 | |
1b12b9c1 SM |
740 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) && |
741 | CIFSCouldBeMFSymlink(&fattr)) | |
742 | /* | |
743 | * trying to get the type and mode can be slow, | |
744 | * so just call those regular files for now, and mark | |
745 | * for reval | |
746 | */ | |
747 | fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; | |
748 | ||
0b8f18e3 JL |
749 | ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid); |
750 | tmp_dentry = cifs_readdir_lookup(file->f_dentry, &qstring, &fattr); | |
3870253e SF |
751 | |
752 | rc = filldir(direntry, qstring.name, qstring.len, file->f_pos, | |
0b8f18e3 JL |
753 | ino, fattr.cf_dtype); |
754 | ||
755 | /* | |
756 | * we can not return filldir errors to the caller since they are | |
757 | * "normal" when the stat blocksize is too small - we return remapped | |
758 | * error instead | |
759 | * | |
760 | * FIXME: This looks bogus. filldir returns -EOVERFLOW in the above | |
761 | * case already. Why should we be clobbering other errors from it? | |
762 | */ | |
790fe579 | 763 | if (rc) { |
b6b38f70 | 764 | cFYI(1, "filldir rc = %d", rc); |
7ca85ba7 | 765 | rc = -EOVERFLOW; |
1da177e4 | 766 | } |
1da177e4 LT |
767 | dput(tmp_dentry); |
768 | return rc; | |
769 | } | |
770 | ||
1da177e4 LT |
771 | |
772 | int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) | |
773 | { | |
774 | int rc = 0; | |
3870253e | 775 | int xid, i; |
1da177e4 LT |
776 | struct cifs_sb_info *cifs_sb; |
777 | struct cifsTconInfo *pTcon; | |
778 | struct cifsFileInfo *cifsFile = NULL; | |
3870253e | 779 | char *current_entry; |
1da177e4 | 780 | int num_to_fill = 0; |
3870253e | 781 | char *tmp_buf = NULL; |
50c2f753 | 782 | char *end_of_smb; |
18295796 | 783 | unsigned int max_len; |
1da177e4 LT |
784 | |
785 | xid = GetXid(); | |
786 | ||
e6a00296 | 787 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 | 788 | |
1da177e4 LT |
789 | switch ((int) file->f_pos) { |
790 | case 0: | |
60808233 | 791 | if (filldir(direntry, ".", 1, file->f_pos, |
e6a00296 | 792 | file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) { |
b6b38f70 | 793 | cERROR(1, "Filldir for current dir failed"); |
1da177e4 LT |
794 | rc = -ENOMEM; |
795 | break; | |
796 | } | |
60808233 | 797 | file->f_pos++; |
1da177e4 | 798 | case 1: |
60808233 | 799 | if (filldir(direntry, "..", 2, file->f_pos, |
e6a00296 | 800 | file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) { |
b6b38f70 | 801 | cERROR(1, "Filldir for parent dir failed"); |
1da177e4 LT |
802 | rc = -ENOMEM; |
803 | break; | |
804 | } | |
60808233 SF |
805 | file->f_pos++; |
806 | default: | |
3870253e SF |
807 | /* 1) If search is active, |
808 | is in current search buffer? | |
1da177e4 LT |
809 | if it before then restart search |
810 | if after then keep searching till find it */ | |
811 | ||
790fe579 | 812 | if (file->private_data == NULL) { |
3870253e | 813 | rc = initiate_cifs_search(xid, file); |
b6b38f70 | 814 | cFYI(1, "initiate cifs search rc %d", rc); |
790fe579 | 815 | if (rc) { |
1da177e4 LT |
816 | FreeXid(xid); |
817 | return rc; | |
818 | } | |
819 | } | |
790fe579 | 820 | if (file->private_data == NULL) { |
1da177e4 LT |
821 | rc = -EINVAL; |
822 | FreeXid(xid); | |
823 | return rc; | |
824 | } | |
825 | cifsFile = file->private_data; | |
826 | if (cifsFile->srch_inf.endOfSearch) { | |
790fe579 | 827 | if (cifsFile->srch_inf.emptyDir) { |
b6b38f70 | 828 | cFYI(1, "End of search, empty dir"); |
1da177e4 LT |
829 | rc = 0; |
830 | break; | |
831 | } | |
832 | } /* else { | |
4b18f2a9 | 833 | cifsFile->invalidHandle = true; |
1da177e4 | 834 | CIFSFindClose(xid, pTcon, cifsFile->netfid); |
aaa9bbe0 | 835 | } */ |
1da177e4 | 836 | |
ba00ba64 | 837 | pTcon = cifsFile->tcon; |
3870253e SF |
838 | rc = find_cifs_entry(xid, pTcon, file, |
839 | ¤t_entry, &num_to_fill); | |
790fe579 | 840 | if (rc) { |
b6b38f70 | 841 | cFYI(1, "fce error %d", rc); |
1da177e4 LT |
842 | goto rddir2_exit; |
843 | } else if (current_entry != NULL) { | |
b6b38f70 | 844 | cFYI(1, "entry %lld found", file->f_pos); |
1da177e4 | 845 | } else { |
b6b38f70 | 846 | cFYI(1, "could not find entry"); |
1da177e4 LT |
847 | goto rddir2_exit; |
848 | } | |
b6b38f70 JP |
849 | cFYI(1, "loop through %d times filling dir for net buf %p", |
850 | num_to_fill, cifsFile->srch_inf.ntwrk_buf_start); | |
5bafd765 SF |
851 | max_len = smbCalcSize((struct smb_hdr *) |
852 | cifsFile->srch_inf.ntwrk_buf_start); | |
853 | end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len; | |
854 | ||
f5884166 | 855 | tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL); |
f55fdcca KV |
856 | if (tmp_buf == NULL) { |
857 | rc = -ENOMEM; | |
858 | break; | |
859 | } | |
860 | ||
790fe579 SF |
861 | for (i = 0; (i < num_to_fill) && (rc == 0); i++) { |
862 | if (current_entry == NULL) { | |
1da177e4 | 863 | /* evaluate whether this case is an error */ |
b6b38f70 JP |
864 | cERROR(1, "past SMB end, num to fill %d i %d", |
865 | num_to_fill, i); | |
1da177e4 LT |
866 | break; |
867 | } | |
60808233 SF |
868 | /* if buggy server returns . and .. late do |
869 | we want to check for that here? */ | |
5bafd765 SF |
870 | rc = cifs_filldir(current_entry, file, |
871 | filldir, direntry, tmp_buf, max_len); | |
790fe579 | 872 | if (rc == -EOVERFLOW) { |
7ca85ba7 SF |
873 | rc = 0; |
874 | break; | |
875 | } | |
876 | ||
1da177e4 | 877 | file->f_pos++; |
790fe579 | 878 | if (file->f_pos == |
3979877e | 879 | cifsFile->srch_inf.index_of_last_entry) { |
b6b38f70 JP |
880 | cFYI(1, "last entry in buf at pos %lld %s", |
881 | file->f_pos, tmp_buf); | |
790fe579 | 882 | cifs_save_resume_key(current_entry, cifsFile); |
1da177e4 | 883 | break; |
790fe579 SF |
884 | } else |
885 | current_entry = | |
5bafd765 SF |
886 | nxt_dir_entry(current_entry, end_of_smb, |
887 | cifsFile->srch_inf.info_level); | |
1da177e4 LT |
888 | } |
889 | kfree(tmp_buf); | |
890 | break; | |
891 | } /* end switch */ | |
892 | ||
893 | rddir2_exit: | |
1da177e4 LT |
894 | FreeXid(xid); |
895 | return rc; | |
896 | } |