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 | 81 | if (parent->d_op && parent->d_op->d_hash) |
b1e6a015 | 82 | parent->d_op->d_hash(parent, parent->d_inode, name); |
05507fa2 JL |
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 | ||
0d424ad0 | 105 | if (cifs_sb_master_tcon(CIFS_SB(sb))->nocase) |
fb045adb | 106 | d_set_d_op(dentry, &cifs_ci_dentry_ops); |
cc0bad75 | 107 | else |
fb045adb | 108 | d_set_d_op(dentry, &cifs_dentry_ops); |
cc0bad75 JL |
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 | { | |
0d424ad0 | 174 | int offset = cifs_sb_master_tcon(cifs_sb)->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; | |
a6e8a845 | 202 | struct cifsTconInfo *ptcon = cifs_sb_tcon(cifs_sb); |
0e0d2cf3 SF |
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; | |
7ffec372 | 226 | char *full_path = NULL; |
3870253e | 227 | struct cifsFileInfo *cifsFile; |
7ffec372 | 228 | struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
59c55ba1 | 229 | struct tcon_link *tlink = NULL; |
1da177e4 LT |
230 | struct cifsTconInfo *pTcon; |
231 | ||
7ffec372 | 232 | if (file->private_data == NULL) { |
59c55ba1 JL |
233 | tlink = cifs_sb_tlink(cifs_sb); |
234 | if (IS_ERR(tlink)) | |
235 | return PTR_ERR(tlink); | |
236 | ||
237 | cifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); | |
238 | if (cifsFile == NULL) { | |
239 | rc = -ENOMEM; | |
240 | goto error_exit; | |
241 | } | |
242 | file->private_data = cifsFile; | |
243 | cifsFile->tlink = cifs_get_tlink(tlink); | |
244 | pTcon = tlink_tcon(tlink); | |
245 | } else { | |
246 | cifsFile = file->private_data; | |
247 | pTcon = tlink_tcon(cifsFile->tlink); | |
7ffec372 | 248 | } |
1da177e4 | 249 | |
4b18f2a9 SF |
250 | cifsFile->invalidHandle = true; |
251 | cifsFile->srch_inf.endOfSearch = false; | |
1da177e4 | 252 | |
e6a00296 | 253 | full_path = build_path_from_dentry(file->f_path.dentry); |
7ffec372 JL |
254 | if (full_path == NULL) { |
255 | rc = -ENOMEM; | |
256 | goto error_exit; | |
257 | } | |
1da177e4 | 258 | |
b6b38f70 | 259 | cFYI(1, "Full path: %s start at: %lld", full_path, file->f_pos); |
1da177e4 | 260 | |
75cf6bdc | 261 | ffirst_retry: |
1da177e4 | 262 | /* test for Unix extensions */ |
c18c842b SF |
263 | /* but now check for them on the share/mount not on the SMB session */ |
264 | /* if (pTcon->ses->capabilities & CAP_UNIX) { */ | |
ad7a2926 | 265 | if (pTcon->unix_ext) |
5bafd765 | 266 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX; |
ad7a2926 | 267 | else if ((pTcon->ses->capabilities & |
5bafd765 SF |
268 | (CAP_NT_SMBS | CAP_NT_FIND)) == 0) { |
269 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD; | |
1da177e4 LT |
270 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
271 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; | |
272 | } else /* not srvinos - BB fixme add check for backlevel? */ { | |
273 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
274 | } | |
275 | ||
3870253e | 276 | rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls, |
737b758c | 277 | &cifsFile->netfid, &cifsFile->srch_inf, |
3870253e | 278 | cifs_sb->mnt_cifs_flags & |
eafe8701 | 279 | CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); |
4523cc30 | 280 | if (rc == 0) |
4b18f2a9 | 281 | cifsFile->invalidHandle = false; |
e836f015 | 282 | /* BB add following call to handle readdir on new NTFS symlink errors |
0e0d2cf3 SF |
283 | else if STATUS_STOPPED_ON_SYMLINK |
284 | call get_symlink_reparse_path and retry with new path */ | |
285 | else if ((rc == -EOPNOTSUPP) && | |
75cf6bdc SF |
286 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
287 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; | |
288 | goto ffirst_retry; | |
289 | } | |
7ffec372 | 290 | error_exit: |
1da177e4 | 291 | kfree(full_path); |
7ffec372 | 292 | cifs_put_tlink(tlink); |
1da177e4 LT |
293 | return rc; |
294 | } | |
295 | ||
296 | /* return length of unicode string in bytes */ | |
297 | static int cifs_unicode_bytelen(char *str) | |
298 | { | |
299 | int len; | |
63d2583f | 300 | __le16 *ustr = (__le16 *)str; |
1da177e4 | 301 | |
3870253e | 302 | for (len = 0; len <= PATH_MAX; len++) { |
4523cc30 | 303 | if (ustr[len] == 0) |
1da177e4 LT |
304 | return len << 1; |
305 | } | |
b6b38f70 | 306 | cFYI(1, "Unicode string longer than PATH_MAX found"); |
1da177e4 LT |
307 | return len << 1; |
308 | } | |
309 | ||
5bafd765 | 310 | static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level) |
1da177e4 | 311 | { |
3870253e | 312 | char *new_entry; |
ad7a2926 | 313 | FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry; |
1da177e4 | 314 | |
4523cc30 | 315 | if (level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 316 | FIND_FILE_STANDARD_INFO *pfData; |
5bafd765 SF |
317 | pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo; |
318 | ||
319 | new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) + | |
320 | pfData->FileNameLength; | |
321 | } else | |
322 | new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset); | |
b6b38f70 | 323 | cFYI(1, "new entry %p old entry %p", new_entry, old_entry); |
1da177e4 | 324 | /* validate that new_entry is not past end of SMB */ |
4523cc30 | 325 | if (new_entry >= end_of_smb) { |
b6b38f70 JP |
326 | cERROR(1, "search entry %p began after end of SMB %p old entry %p", |
327 | new_entry, end_of_smb, old_entry); | |
1da177e4 | 328 | return NULL; |
4523cc30 | 329 | } else if (((level == SMB_FIND_FILE_INFO_STANDARD) && |
3870253e SF |
330 | (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) |
331 | || ((level != SMB_FIND_FILE_INFO_STANDARD) && | |
5bafd765 | 332 | (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) { |
b6b38f70 JP |
333 | cERROR(1, "search entry %p extends after end of SMB %p", |
334 | new_entry, end_of_smb); | |
09d1db5c | 335 | return NULL; |
3870253e | 336 | } else |
1da177e4 LT |
337 | return new_entry; |
338 | ||
339 | } | |
340 | ||
341 | #define UNICODE_DOT cpu_to_le16(0x2e) | |
342 | ||
343 | /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */ | |
344 | static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile) | |
345 | { | |
346 | int rc = 0; | |
3870253e SF |
347 | char *filename = NULL; |
348 | int len = 0; | |
1da177e4 | 349 | |
4523cc30 | 350 | if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) { |
ad7a2926 | 351 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; |
1da177e4 | 352 | filename = &pFindData->FileName[0]; |
4523cc30 | 353 | if (cfile->srch_inf.unicode) { |
1da177e4 LT |
354 | len = cifs_unicode_bytelen(filename); |
355 | } else { | |
356 | /* BB should we make this strnlen of PATH_MAX? */ | |
357 | len = strnlen(filename, 5); | |
358 | } | |
4523cc30 | 359 | } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) { |
ad7a2926 | 360 | FILE_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
361 | (FILE_DIRECTORY_INFO *)current_entry; |
362 | filename = &pFindData->FileName[0]; | |
363 | len = le32_to_cpu(pFindData->FileNameLength); | |
3870253e | 364 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 365 | SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
ad7a2926 | 366 | FILE_FULL_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
367 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
368 | filename = &pFindData->FileName[0]; | |
369 | len = le32_to_cpu(pFindData->FileNameLength); | |
4523cc30 | 370 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 371 | SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
ad7a2926 | 372 | SEARCH_ID_FULL_DIR_INFO *pFindData = |
1da177e4 LT |
373 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
374 | filename = &pFindData->FileName[0]; | |
375 | len = le32_to_cpu(pFindData->FileNameLength); | |
3870253e | 376 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 377 | SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
ad7a2926 | 378 | FILE_BOTH_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
379 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
380 | filename = &pFindData->FileName[0]; | |
381 | len = le32_to_cpu(pFindData->FileNameLength); | |
4523cc30 | 382 | } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 383 | FIND_FILE_STANDARD_INFO *pFindData = |
5bafd765 SF |
384 | (FIND_FILE_STANDARD_INFO *)current_entry; |
385 | filename = &pFindData->FileName[0]; | |
5ddaa683 | 386 | len = pFindData->FileNameLength; |
1da177e4 | 387 | } else { |
b6b38f70 JP |
388 | cFYI(1, "Unknown findfirst level %d", |
389 | cfile->srch_inf.info_level); | |
1da177e4 LT |
390 | } |
391 | ||
4523cc30 SF |
392 | if (filename) { |
393 | if (cfile->srch_inf.unicode) { | |
1da177e4 | 394 | __le16 *ufilename = (__le16 *)filename; |
4523cc30 | 395 | if (len == 2) { |
1da177e4 | 396 | /* check for . */ |
4523cc30 | 397 | if (ufilename[0] == UNICODE_DOT) |
1da177e4 | 398 | rc = 1; |
4523cc30 | 399 | } else if (len == 4) { |
1da177e4 | 400 | /* check for .. */ |
4523cc30 | 401 | if ((ufilename[0] == UNICODE_DOT) |
3870253e | 402 | && (ufilename[1] == UNICODE_DOT)) |
1da177e4 LT |
403 | rc = 2; |
404 | } | |
405 | } else /* ASCII */ { | |
4523cc30 | 406 | if (len == 1) { |
3870253e | 407 | if (filename[0] == '.') |
1da177e4 | 408 | rc = 1; |
4523cc30 | 409 | } else if (len == 2) { |
790fe579 | 410 | if ((filename[0] == '.') && (filename[1] == '.')) |
1da177e4 LT |
411 | rc = 2; |
412 | } | |
413 | } | |
414 | } | |
415 | ||
416 | return rc; | |
417 | } | |
418 | ||
eafe8701 SF |
419 | /* Check if directory that we are searching has changed so we can decide |
420 | whether we can use the cached search results from the previous search */ | |
3870253e | 421 | static int is_dir_changed(struct file *file) |
eafe8701 | 422 | { |
c33f8d32 CH |
423 | struct inode *inode = file->f_path.dentry->d_inode; |
424 | struct cifsInodeInfo *cifsInfo = CIFS_I(inode); | |
eafe8701 | 425 | |
c33f8d32 | 426 | if (cifsInfo->time == 0) |
eafe8701 SF |
427 | return 1; /* directory was changed, perhaps due to unlink */ |
428 | else | |
429 | return 0; | |
430 | ||
431 | } | |
432 | ||
0752f152 SF |
433 | static int cifs_save_resume_key(const char *current_entry, |
434 | struct cifsFileInfo *cifsFile) | |
435 | { | |
436 | int rc = 0; | |
437 | unsigned int len = 0; | |
438 | __u16 level; | |
439 | char *filename; | |
440 | ||
441 | if ((cifsFile == NULL) || (current_entry == NULL)) | |
442 | return -EINVAL; | |
443 | ||
444 | level = cifsFile->srch_inf.info_level; | |
445 | ||
446 | if (level == SMB_FIND_FILE_UNIX) { | |
447 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; | |
448 | ||
449 | filename = &pFindData->FileName[0]; | |
450 | if (cifsFile->srch_inf.unicode) { | |
451 | len = cifs_unicode_bytelen(filename); | |
452 | } else { | |
453 | /* BB should we make this strnlen of PATH_MAX? */ | |
454 | len = strnlen(filename, PATH_MAX); | |
455 | } | |
456 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; | |
457 | } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) { | |
458 | FILE_DIRECTORY_INFO *pFindData = | |
459 | (FILE_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_FULL_DIRECTORY_INFO) { | |
464 | FILE_FULL_DIRECTORY_INFO *pFindData = | |
465 | (FILE_FULL_DIRECTORY_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_ID_FULL_DIR_INFO) { | |
470 | SEARCH_ID_FULL_DIR_INFO *pFindData = | |
471 | (SEARCH_ID_FULL_DIR_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_BOTH_DIRECTORY_INFO) { | |
476 | FILE_BOTH_DIRECTORY_INFO *pFindData = | |
477 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
478 | filename = &pFindData->FileName[0]; | |
479 | len = le32_to_cpu(pFindData->FileNameLength); | |
480 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
481 | } else if (level == SMB_FIND_FILE_INFO_STANDARD) { | |
482 | FIND_FILE_STANDARD_INFO *pFindData = | |
483 | (FIND_FILE_STANDARD_INFO *)current_entry; | |
484 | filename = &pFindData->FileName[0]; | |
485 | /* one byte length, no name conversion */ | |
486 | len = (unsigned int)pFindData->FileNameLength; | |
487 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; | |
488 | } else { | |
b6b38f70 | 489 | cFYI(1, "Unknown findfirst level %d", level); |
0752f152 SF |
490 | return -EINVAL; |
491 | } | |
492 | cifsFile->srch_inf.resume_name_len = len; | |
493 | cifsFile->srch_inf.presume_name = filename; | |
494 | return rc; | |
495 | } | |
496 | ||
1da177e4 LT |
497 | /* find the corresponding entry in the search */ |
498 | /* Note that the SMB server returns search entries for . and .. which | |
499 | complicates logic here if we choose to parse for them and we do not | |
500 | assume that they are located in the findfirst return buffer.*/ | |
501 | /* We start counting in the buffer with entry 2 and increment for every | |
502 | entry (do not increment for . or .. entry) */ | |
503 | static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon, | |
3870253e | 504 | struct file *file, char **ppCurrentEntry, int *num_to_ret) |
1da177e4 LT |
505 | { |
506 | int rc = 0; | |
507 | int pos_in_buf = 0; | |
508 | loff_t first_entry_in_buffer; | |
509 | loff_t index_to_find = file->f_pos; | |
3870253e | 510 | struct cifsFileInfo *cifsFile = file->private_data; |
1da177e4 | 511 | /* check if index in the buffer */ |
50c2f753 | 512 | |
3870253e | 513 | if ((cifsFile == NULL) || (ppCurrentEntry == NULL) || |
eafe8701 | 514 | (num_to_ret == NULL)) |
1da177e4 | 515 | return -ENOENT; |
50c2f753 | 516 | |
1da177e4 | 517 | *ppCurrentEntry = NULL; |
3870253e SF |
518 | first_entry_in_buffer = |
519 | cifsFile->srch_inf.index_of_last_entry - | |
1da177e4 | 520 | cifsFile->srch_inf.entries_in_buffer; |
60808233 SF |
521 | |
522 | /* if first entry in buf is zero then is first buffer | |
523 | in search response data which means it is likely . and .. | |
524 | will be in this buffer, although some servers do not return | |
525 | . and .. for the root of a drive and for those we need | |
526 | to start two entries earlier */ | |
527 | ||
3979877e | 528 | dump_cifs_file_struct(file, "In fce "); |
3870253e SF |
529 | if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) && |
530 | is_dir_changed(file)) || | |
eafe8701 | 531 | (index_to_find < first_entry_in_buffer)) { |
1da177e4 | 532 | /* close and restart search */ |
b6b38f70 | 533 | cFYI(1, "search backing up - close and restart search"); |
4477288a | 534 | spin_lock(&cifs_file_list_lock); |
77c57ec8 SF |
535 | if (!cifsFile->srch_inf.endOfSearch && |
536 | !cifsFile->invalidHandle) { | |
537 | cifsFile->invalidHandle = true; | |
4477288a | 538 | spin_unlock(&cifs_file_list_lock); |
77c57ec8 | 539 | CIFSFindClose(xid, pTcon, cifsFile->netfid); |
ddb4cbfc | 540 | } else |
4477288a | 541 | spin_unlock(&cifs_file_list_lock); |
4523cc30 | 542 | if (cifsFile->srch_inf.ntwrk_buf_start) { |
b6b38f70 | 543 | cFYI(1, "freeing SMB ff cache buf on search rewind"); |
4523cc30 | 544 | if (cifsFile->srch_inf.smallBuf) |
d47d7c1a SF |
545 | cifs_small_buf_release(cifsFile->srch_inf. |
546 | ntwrk_buf_start); | |
547 | else | |
548 | cifs_buf_release(cifsFile->srch_inf. | |
549 | ntwrk_buf_start); | |
76c510ad | 550 | cifsFile->srch_inf.ntwrk_buf_start = NULL; |
1da177e4 | 551 | } |
3870253e | 552 | rc = initiate_cifs_search(xid, file); |
4523cc30 | 553 | if (rc) { |
b6b38f70 JP |
554 | cFYI(1, "error %d reinitiating a search on rewind", |
555 | rc); | |
1da177e4 LT |
556 | return rc; |
557 | } | |
a364bc0b | 558 | cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile); |
1da177e4 LT |
559 | } |
560 | ||
3870253e | 561 | while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) && |
4b18f2a9 | 562 | (rc == 0) && !cifsFile->srch_inf.endOfSearch) { |
b6b38f70 | 563 | cFYI(1, "calling findnext2"); |
3870253e | 564 | rc = CIFSFindNext(xid, pTcon, cifsFile->netfid, |
dfb7533b | 565 | &cifsFile->srch_inf); |
a364bc0b | 566 | cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile); |
4523cc30 | 567 | if (rc) |
1da177e4 LT |
568 | return -ENOENT; |
569 | } | |
4523cc30 | 570 | if (index_to_find < cifsFile->srch_inf.index_of_last_entry) { |
1da177e4 LT |
571 | /* we found the buffer that contains the entry */ |
572 | /* scan and find it */ | |
573 | int i; | |
3870253e SF |
574 | char *current_entry; |
575 | char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + | |
1da177e4 LT |
576 | smbCalcSize((struct smb_hdr *) |
577 | cifsFile->srch_inf.ntwrk_buf_start); | |
60808233 SF |
578 | |
579 | current_entry = cifsFile->srch_inf.srch_entries_start; | |
1da177e4 LT |
580 | first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry |
581 | - cifsFile->srch_inf.entries_in_buffer; | |
582 | pos_in_buf = index_to_find - first_entry_in_buffer; | |
b6b38f70 | 583 | cFYI(1, "found entry - pos_in_buf %d", pos_in_buf); |
5bafd765 | 584 | |
ad7a2926 | 585 | for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) { |
dfb7533b | 586 | /* go entry by entry figuring out which is first */ |
3870253e | 587 | current_entry = nxt_dir_entry(current_entry, end_of_smb, |
5bafd765 | 588 | cifsFile->srch_inf.info_level); |
1da177e4 | 589 | } |
790fe579 | 590 | if ((current_entry == NULL) && (i < pos_in_buf)) { |
1da177e4 | 591 | /* BB fixme - check if we should flag this error */ |
b6b38f70 | 592 | cERROR(1, "reached end of buf searching for pos in buf" |
1da177e4 | 593 | " %d index to find %lld rc %d", |
b6b38f70 | 594 | pos_in_buf, index_to_find, rc); |
1da177e4 LT |
595 | } |
596 | rc = 0; | |
597 | *ppCurrentEntry = current_entry; | |
598 | } else { | |
b6b38f70 | 599 | cFYI(1, "index not in buffer - could not findnext into it"); |
1da177e4 LT |
600 | return 0; |
601 | } | |
602 | ||
790fe579 | 603 | if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) { |
b6b38f70 | 604 | cFYI(1, "can not return entries pos_in_buf beyond last"); |
1da177e4 LT |
605 | *num_to_ret = 0; |
606 | } else | |
607 | *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf; | |
1da177e4 LT |
608 | |
609 | return rc; | |
610 | } | |
611 | ||
612 | /* inode num, inode type and filename returned */ | |
613 | static int cifs_get_name_from_search_buf(struct qstr *pqst, | |
614 | char *current_entry, __u16 level, unsigned int unicode, | |
18295796 | 615 | struct cifs_sb_info *cifs_sb, unsigned int max_len, __u64 *pinum) |
1da177e4 LT |
616 | { |
617 | int rc = 0; | |
618 | unsigned int len = 0; | |
3870253e SF |
619 | char *filename; |
620 | struct nls_table *nlt = cifs_sb->local_nls; | |
1da177e4 LT |
621 | |
622 | *pinum = 0; | |
623 | ||
790fe579 | 624 | if (level == SMB_FIND_FILE_UNIX) { |
3870253e | 625 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; |
1da177e4 LT |
626 | |
627 | filename = &pFindData->FileName[0]; | |
790fe579 | 628 | if (unicode) { |
1da177e4 LT |
629 | len = cifs_unicode_bytelen(filename); |
630 | } else { | |
631 | /* BB should we make this strnlen of PATH_MAX? */ | |
632 | len = strnlen(filename, PATH_MAX); | |
633 | } | |
634 | ||
cc0bad75 | 635 | *pinum = le64_to_cpu(pFindData->basic.UniqueId); |
790fe579 | 636 | } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) { |
3870253e | 637 | FILE_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
638 | (FILE_DIRECTORY_INFO *)current_entry; |
639 | filename = &pFindData->FileName[0]; | |
640 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 641 | } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
3870253e | 642 | FILE_FULL_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
643 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
644 | filename = &pFindData->FileName[0]; | |
645 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 646 | } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
3870253e | 647 | SEARCH_ID_FULL_DIR_INFO *pFindData = |
1da177e4 LT |
648 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
649 | filename = &pFindData->FileName[0]; | |
650 | len = le32_to_cpu(pFindData->FileNameLength); | |
85a6dac5 | 651 | *pinum = le64_to_cpu(pFindData->UniqueId); |
790fe579 | 652 | } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
3870253e | 653 | FILE_BOTH_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
654 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
655 | filename = &pFindData->FileName[0]; | |
656 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 657 | } else if (level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 658 | FIND_FILE_STANDARD_INFO *pFindData = |
5bafd765 SF |
659 | (FIND_FILE_STANDARD_INFO *)current_entry; |
660 | filename = &pFindData->FileName[0]; | |
661 | /* one byte length, no name conversion */ | |
662 | len = (unsigned int)pFindData->FileNameLength; | |
1da177e4 | 663 | } else { |
b6b38f70 | 664 | cFYI(1, "Unknown findfirst level %d", level); |
1da177e4 LT |
665 | return -EINVAL; |
666 | } | |
5bafd765 | 667 | |
790fe579 | 668 | if (len > max_len) { |
b6b38f70 | 669 | cERROR(1, "bad search response length %d past smb end", len); |
5bafd765 SF |
670 | return -EINVAL; |
671 | } | |
672 | ||
790fe579 | 673 | if (unicode) { |
f5884166 JL |
674 | pqst->len = cifs_from_ucs2((char *) pqst->name, |
675 | (__le16 *) filename, | |
18295796 JL |
676 | UNICODE_NAME_MAX, |
677 | min(len, max_len), nlt, | |
f5884166 JL |
678 | cifs_sb->mnt_cifs_flags & |
679 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
f12f98db | 680 | pqst->len -= nls_nullsize(nlt); |
1da177e4 LT |
681 | } else { |
682 | pqst->name = filename; | |
683 | pqst->len = len; | |
684 | } | |
1da177e4 LT |
685 | return rc; |
686 | } | |
687 | ||
18295796 JL |
688 | static int cifs_filldir(char *pfindEntry, struct file *file, filldir_t filldir, |
689 | void *direntry, char *scratch_buf, unsigned int max_len) | |
1da177e4 LT |
690 | { |
691 | int rc = 0; | |
692 | struct qstr qstring; | |
3870253e | 693 | struct cifsFileInfo *pCifsF; |
0b8f18e3 | 694 | u64 inum; |
cc0bad75 | 695 | ino_t ino; |
0b8f18e3 | 696 | struct super_block *sb; |
3870253e | 697 | struct cifs_sb_info *cifs_sb; |
1da177e4 | 698 | struct dentry *tmp_dentry; |
cc0bad75 | 699 | struct cifs_fattr fattr; |
1da177e4 LT |
700 | |
701 | /* get filename and len into qstring */ | |
702 | /* get dentry */ | |
703 | /* decide whether to create and populate ionde */ | |
790fe579 | 704 | if ((direntry == NULL) || (file == NULL)) |
1da177e4 LT |
705 | return -EINVAL; |
706 | ||
707 | pCifsF = file->private_data; | |
50c2f753 | 708 | |
790fe579 | 709 | if ((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL)) |
1da177e4 LT |
710 | return -ENOENT; |
711 | ||
3870253e | 712 | rc = cifs_entry_is_dot(pfindEntry, pCifsF); |
60808233 | 713 | /* skip . and .. since we added them first */ |
790fe579 | 714 | if (rc != 0) |
60808233 SF |
715 | return 0; |
716 | ||
0b8f18e3 JL |
717 | sb = file->f_path.dentry->d_sb; |
718 | cifs_sb = CIFS_SB(sb); | |
1da177e4 LT |
719 | |
720 | qstring.name = scratch_buf; | |
3870253e | 721 | rc = cifs_get_name_from_search_buf(&qstring, pfindEntry, |
1da177e4 | 722 | pCifsF->srch_inf.info_level, |
3870253e | 723 | pCifsF->srch_inf.unicode, cifs_sb, |
0b8f18e3 | 724 | max_len, &inum /* returned */); |
1da177e4 | 725 | |
790fe579 | 726 | if (rc) |
1da177e4 LT |
727 | return rc; |
728 | ||
0b8f18e3 | 729 | if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) |
cc0bad75 JL |
730 | cifs_unix_basic_to_fattr(&fattr, |
731 | &((FILE_UNIX_INFO *) pfindEntry)->basic, | |
732 | cifs_sb); | |
0b8f18e3 JL |
733 | else if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) |
734 | cifs_std_info_to_fattr(&fattr, (FIND_FILE_STANDARD_INFO *) | |
735 | pfindEntry, cifs_sb); | |
736 | else | |
737 | cifs_dir_info_to_fattr(&fattr, (FILE_DIRECTORY_INFO *) | |
738 | pfindEntry, cifs_sb); | |
b835bebe | 739 | |
ec06aedd | 740 | if (inum && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
0b8f18e3 | 741 | fattr.cf_uniqueid = inum; |
ec06aedd | 742 | } else { |
0b8f18e3 | 743 | fattr.cf_uniqueid = iunique(sb, ROOT_I); |
ec06aedd JL |
744 | cifs_autodisable_serverino(cifs_sb); |
745 | } | |
50c2f753 | 746 | |
1b12b9c1 SM |
747 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) && |
748 | CIFSCouldBeMFSymlink(&fattr)) | |
749 | /* | |
750 | * trying to get the type and mode can be slow, | |
751 | * so just call those regular files for now, and mark | |
752 | * for reval | |
753 | */ | |
754 | fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; | |
755 | ||
0b8f18e3 JL |
756 | ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid); |
757 | tmp_dentry = cifs_readdir_lookup(file->f_dentry, &qstring, &fattr); | |
3870253e SF |
758 | |
759 | rc = filldir(direntry, qstring.name, qstring.len, file->f_pos, | |
0b8f18e3 JL |
760 | ino, fattr.cf_dtype); |
761 | ||
1da177e4 LT |
762 | dput(tmp_dentry); |
763 | return rc; | |
764 | } | |
765 | ||
1da177e4 LT |
766 | |
767 | int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) | |
768 | { | |
769 | int rc = 0; | |
3870253e | 770 | int xid, i; |
1da177e4 LT |
771 | struct cifs_sb_info *cifs_sb; |
772 | struct cifsTconInfo *pTcon; | |
773 | struct cifsFileInfo *cifsFile = NULL; | |
3870253e | 774 | char *current_entry; |
1da177e4 | 775 | int num_to_fill = 0; |
3870253e | 776 | char *tmp_buf = NULL; |
50c2f753 | 777 | char *end_of_smb; |
18295796 | 778 | unsigned int max_len; |
1da177e4 LT |
779 | |
780 | xid = GetXid(); | |
781 | ||
e6a00296 | 782 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 | 783 | |
6221ddd0 SJ |
784 | /* |
785 | * Ensure FindFirst doesn't fail before doing filldir() for '.' and | |
786 | * '..'. Otherwise we won't be able to notify VFS in case of failure. | |
787 | */ | |
788 | if (file->private_data == NULL) { | |
789 | rc = initiate_cifs_search(xid, file); | |
790 | cFYI(1, "initiate cifs search rc %d", rc); | |
791 | if (rc) | |
792 | goto rddir2_exit; | |
793 | } | |
794 | ||
1da177e4 LT |
795 | switch ((int) file->f_pos) { |
796 | case 0: | |
60808233 | 797 | if (filldir(direntry, ".", 1, file->f_pos, |
e6a00296 | 798 | file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) { |
b6b38f70 | 799 | cERROR(1, "Filldir for current dir failed"); |
1da177e4 LT |
800 | rc = -ENOMEM; |
801 | break; | |
802 | } | |
60808233 | 803 | file->f_pos++; |
1da177e4 | 804 | case 1: |
60808233 | 805 | if (filldir(direntry, "..", 2, file->f_pos, |
e6a00296 | 806 | file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) { |
b6b38f70 | 807 | cERROR(1, "Filldir for parent dir failed"); |
1da177e4 LT |
808 | rc = -ENOMEM; |
809 | break; | |
810 | } | |
60808233 SF |
811 | file->f_pos++; |
812 | default: | |
3870253e SF |
813 | /* 1) If search is active, |
814 | is in current search buffer? | |
1da177e4 LT |
815 | if it before then restart search |
816 | if after then keep searching till find it */ | |
817 | ||
790fe579 | 818 | if (file->private_data == NULL) { |
1da177e4 LT |
819 | rc = -EINVAL; |
820 | FreeXid(xid); | |
821 | return rc; | |
822 | } | |
823 | cifsFile = file->private_data; | |
824 | if (cifsFile->srch_inf.endOfSearch) { | |
790fe579 | 825 | if (cifsFile->srch_inf.emptyDir) { |
b6b38f70 | 826 | cFYI(1, "End of search, empty dir"); |
1da177e4 LT |
827 | rc = 0; |
828 | break; | |
829 | } | |
830 | } /* else { | |
4b18f2a9 | 831 | cifsFile->invalidHandle = true; |
1da177e4 | 832 | CIFSFindClose(xid, pTcon, cifsFile->netfid); |
aaa9bbe0 | 833 | } */ |
1da177e4 | 834 | |
13cfb733 | 835 | pTcon = tlink_tcon(cifsFile->tlink); |
3870253e SF |
836 | rc = find_cifs_entry(xid, pTcon, file, |
837 | ¤t_entry, &num_to_fill); | |
790fe579 | 838 | if (rc) { |
b6b38f70 | 839 | cFYI(1, "fce error %d", rc); |
1da177e4 LT |
840 | goto rddir2_exit; |
841 | } else if (current_entry != NULL) { | |
b6b38f70 | 842 | cFYI(1, "entry %lld found", file->f_pos); |
1da177e4 | 843 | } else { |
b6b38f70 | 844 | cFYI(1, "could not find entry"); |
1da177e4 LT |
845 | goto rddir2_exit; |
846 | } | |
b6b38f70 JP |
847 | cFYI(1, "loop through %d times filling dir for net buf %p", |
848 | num_to_fill, cifsFile->srch_inf.ntwrk_buf_start); | |
5bafd765 SF |
849 | max_len = smbCalcSize((struct smb_hdr *) |
850 | cifsFile->srch_inf.ntwrk_buf_start); | |
851 | end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len; | |
852 | ||
f5884166 | 853 | tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL); |
f55fdcca KV |
854 | if (tmp_buf == NULL) { |
855 | rc = -ENOMEM; | |
856 | break; | |
857 | } | |
858 | ||
790fe579 SF |
859 | for (i = 0; (i < num_to_fill) && (rc == 0); i++) { |
860 | if (current_entry == NULL) { | |
1da177e4 | 861 | /* evaluate whether this case is an error */ |
b6b38f70 JP |
862 | cERROR(1, "past SMB end, num to fill %d i %d", |
863 | num_to_fill, i); | |
1da177e4 LT |
864 | break; |
865 | } | |
60808233 SF |
866 | /* if buggy server returns . and .. late do |
867 | we want to check for that here? */ | |
5bafd765 SF |
868 | rc = cifs_filldir(current_entry, file, |
869 | filldir, direntry, tmp_buf, max_len); | |
790fe579 | 870 | if (rc == -EOVERFLOW) { |
7ca85ba7 SF |
871 | rc = 0; |
872 | break; | |
873 | } | |
874 | ||
1da177e4 | 875 | file->f_pos++; |
790fe579 | 876 | if (file->f_pos == |
3979877e | 877 | cifsFile->srch_inf.index_of_last_entry) { |
b6b38f70 JP |
878 | cFYI(1, "last entry in buf at pos %lld %s", |
879 | file->f_pos, tmp_buf); | |
790fe579 | 880 | cifs_save_resume_key(current_entry, cifsFile); |
1da177e4 | 881 | break; |
790fe579 SF |
882 | } else |
883 | current_entry = | |
5bafd765 SF |
884 | nxt_dir_entry(current_entry, end_of_smb, |
885 | cifsFile->srch_inf.info_level); | |
1da177e4 LT |
886 | } |
887 | kfree(tmp_buf); | |
888 | break; | |
889 | } /* end switch */ | |
890 | ||
891 | rddir2_exit: | |
1da177e4 LT |
892 | FreeXid(xid); |
893 | return rc; | |
894 | } |