Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * fs/cifs/readdir.c | |
3 | * | |
4 | * Directory search handling | |
5 | * | |
966ca923 | 6 | * Copyright (C) International Business Machines Corp., 2004, 2005 |
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> | |
24 | #include <linux/stat.h> | |
25 | #include <linux/smp_lock.h> | |
26 | #include "cifspdu.h" | |
27 | #include "cifsglob.h" | |
28 | #include "cifsproto.h" | |
29 | #include "cifs_unicode.h" | |
30 | #include "cifs_debug.h" | |
31 | #include "cifs_fs_sb.h" | |
32 | #include "cifsfs.h" | |
33 | ||
3979877e SF |
34 | #ifdef CONFIG_CIFS_DEBUG2 |
35 | static void dump_cifs_file_struct(struct file *file, char *label) | |
1da177e4 LT |
36 | { |
37 | struct cifsFileInfo * cf; | |
38 | ||
39 | if(file) { | |
40 | cf = file->private_data; | |
41 | if(cf == NULL) { | |
42 | cFYI(1,("empty cifs private file data")); | |
43 | return; | |
44 | } | |
45 | if(cf->invalidHandle) { | |
46 | cFYI(1,("invalid handle")); | |
47 | } | |
48 | if(cf->srch_inf.endOfSearch) { | |
49 | cFYI(1,("end of search")); | |
50 | } | |
51 | if(cf->srch_inf.emptyDir) { | |
52 | cFYI(1,("empty dir")); | |
53 | } | |
54 | ||
55 | } | |
3979877e SF |
56 | } |
57 | #endif /* DEBUG2 */ | |
1da177e4 LT |
58 | |
59 | /* Returns one if new inode created (which therefore needs to be hashed) */ | |
60 | /* Might check in the future if inode number changed so we can rehash inode */ | |
61 | static int construct_dentry(struct qstr *qstring, struct file *file, | |
62 | struct inode **ptmp_inode, struct dentry **pnew_dentry) | |
63 | { | |
64 | struct dentry *tmp_dentry; | |
65 | struct cifs_sb_info *cifs_sb; | |
66 | struct cifsTconInfo *pTcon; | |
67 | int rc = 0; | |
68 | ||
966ca923 | 69 | cFYI(1, ("For %s", qstring->name)); |
1da177e4 LT |
70 | cifs_sb = CIFS_SB(file->f_dentry->d_sb); |
71 | pTcon = cifs_sb->tcon; | |
72 | ||
73 | qstring->hash = full_name_hash(qstring->name, qstring->len); | |
74 | tmp_dentry = d_lookup(file->f_dentry, qstring); | |
75 | if (tmp_dentry) { | |
966ca923 | 76 | cFYI(0, ("existing dentry with inode 0x%p", tmp_dentry->d_inode)); |
1da177e4 LT |
77 | *ptmp_inode = tmp_dentry->d_inode; |
78 | /* BB overwrite old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len??*/ | |
79 | if(*ptmp_inode == NULL) { | |
80 | *ptmp_inode = new_inode(file->f_dentry->d_sb); | |
81 | if(*ptmp_inode == NULL) | |
82 | return rc; | |
83 | rc = 1; | |
84 | d_instantiate(tmp_dentry, *ptmp_inode); | |
85 | } | |
86 | } else { | |
87 | tmp_dentry = d_alloc(file->f_dentry, qstring); | |
88 | if(tmp_dentry == NULL) { | |
89 | cERROR(1,("Failed allocating dentry")); | |
90 | *ptmp_inode = NULL; | |
91 | return rc; | |
92 | } | |
93 | ||
94 | *ptmp_inode = new_inode(file->f_dentry->d_sb); | |
b92327fe SF |
95 | if (pTcon->nocase) |
96 | tmp_dentry->d_op = &cifs_ci_dentry_ops; | |
97 | else | |
98 | tmp_dentry->d_op = &cifs_dentry_ops; | |
1da177e4 LT |
99 | if(*ptmp_inode == NULL) |
100 | return rc; | |
101 | rc = 1; | |
102 | d_instantiate(tmp_dentry, *ptmp_inode); | |
103 | d_rehash(tmp_dentry); | |
104 | } | |
105 | ||
106 | tmp_dentry->d_time = jiffies; | |
107 | *pnew_dentry = tmp_dentry; | |
108 | return rc; | |
109 | } | |
110 | ||
111 | static void fill_in_inode(struct inode *tmp_inode, | |
966ca923 | 112 | FILE_DIRECTORY_INFO *pfindData, int *pobject_type, int isNewInode) |
1da177e4 | 113 | { |
966ca923 SF |
114 | loff_t local_size; |
115 | struct timespec local_mtime; | |
116 | ||
1da177e4 LT |
117 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
118 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
119 | __u32 attr = le32_to_cpu(pfindData->ExtFileAttributes); | |
120 | __u64 allocation_size = le64_to_cpu(pfindData->AllocationSize); | |
121 | __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile); | |
122 | ||
123 | cifsInfo->cifsAttrs = attr; | |
124 | cifsInfo->time = jiffies; | |
125 | ||
966ca923 SF |
126 | /* save mtime and size */ |
127 | local_mtime = tmp_inode->i_mtime; | |
128 | local_size = tmp_inode->i_size; | |
129 | ||
1da177e4 LT |
130 | /* Linux can not store file creation time unfortunately so ignore it */ |
131 | tmp_inode->i_atime = | |
132 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); | |
133 | tmp_inode->i_mtime = | |
134 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime)); | |
135 | tmp_inode->i_ctime = | |
136 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime)); | |
137 | /* treat dos attribute of read-only as read-only mode bit e.g. 555? */ | |
138 | /* 2767 perms - indicate mandatory locking */ | |
139 | /* BB fill in uid and gid here? with help from winbind? | |
140 | or retrieve from NTFS stream extended attribute */ | |
141 | if (atomic_read(&cifsInfo->inUse) == 0) { | |
142 | tmp_inode->i_uid = cifs_sb->mnt_uid; | |
143 | tmp_inode->i_gid = cifs_sb->mnt_gid; | |
144 | /* set default mode. will override for dirs below */ | |
145 | tmp_inode->i_mode = cifs_sb->mnt_file_mode; | |
3020a1f5 SF |
146 | } else { |
147 | /* mask off the type bits since it gets set | |
148 | below and we do not want to get two type | |
149 | bits set */ | |
150 | tmp_inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
151 | } |
152 | ||
1da177e4 LT |
153 | if (attr & ATTR_DIRECTORY) { |
154 | *pobject_type = DT_DIR; | |
155 | /* override default perms since we do not lock dirs */ | |
156 | if(atomic_read(&cifsInfo->inUse) == 0) { | |
157 | tmp_inode->i_mode = cifs_sb->mnt_dir_mode; | |
158 | } | |
159 | tmp_inode->i_mode |= S_IFDIR; | |
eda3c029 | 160 | } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && |
3020a1f5 SF |
161 | (attr & ATTR_SYSTEM)) { |
162 | if (end_of_file == 0) { | |
163 | *pobject_type = DT_FIFO; | |
164 | tmp_inode->i_mode |= S_IFIFO; | |
165 | } else { | |
166 | /* rather than get the type here, we mark the | |
167 | inode as needing revalidate and get the real type | |
168 | (blk vs chr vs. symlink) later ie in lookup */ | |
169 | *pobject_type = DT_REG; | |
170 | tmp_inode->i_mode |= S_IFREG; | |
171 | cifsInfo->time = 0; | |
172 | } | |
1da177e4 LT |
173 | /* we no longer mark these because we could not follow them */ |
174 | /* } else if (attr & ATTR_REPARSE) { | |
175 | *pobject_type = DT_LNK; | |
176 | tmp_inode->i_mode |= S_IFLNK; */ | |
177 | } else { | |
178 | *pobject_type = DT_REG; | |
179 | tmp_inode->i_mode |= S_IFREG; | |
180 | if (attr & ATTR_READONLY) | |
181 | tmp_inode->i_mode &= ~(S_IWUGO); | |
182 | } /* could add code here - to validate if device or weird share type? */ | |
183 | ||
184 | /* can not fill in nlink here as in qpathinfo version and Unx search */ | |
185 | if (atomic_read(&cifsInfo->inUse) == 0) { | |
186 | atomic_set(&cifsInfo->inUse, 1); | |
187 | } | |
188 | ||
189 | if (is_size_safe_to_change(cifsInfo)) { | |
190 | /* can not safely change the file size here if the | |
191 | client is writing to it due to potential races */ | |
192 | i_size_write(tmp_inode, end_of_file); | |
193 | ||
194 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
195 | /* for this calculation, even though the reported blocksize is larger */ | |
196 | tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9; | |
197 | } | |
198 | ||
199 | if (allocation_size < end_of_file) | |
200 | cFYI(1, ("May be sparse file, allocation less than file size")); | |
5515eff8 AM |
201 | cFYI(1, ("File Size %ld and blocks %llu and blocksize %ld", |
202 | (unsigned long)tmp_inode->i_size, | |
203 | (unsigned long long)tmp_inode->i_blocks, | |
204 | tmp_inode->i_blksize)); | |
1da177e4 | 205 | if (S_ISREG(tmp_inode->i_mode)) { |
966ca923 | 206 | cFYI(1, ("File inode")); |
1da177e4 | 207 | tmp_inode->i_op = &cifs_file_inode_ops; |
8b94bcb9 SF |
208 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
209 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
210 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; | |
211 | else | |
212 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
213 | ||
214 | } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
215 | tmp_inode->i_fop = &cifs_file_nobrl_ops; | |
1da177e4 LT |
216 | else |
217 | tmp_inode->i_fop = &cifs_file_ops; | |
f3f6ec4b | 218 | |
1da177e4 | 219 | tmp_inode->i_data.a_ops = &cifs_addr_ops; |
bfa0d75a SF |
220 | if((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
221 | (cifs_sb->tcon->ses->server->maxBuf < | |
222 | 4096 + MAX_CIFS_HDR_SIZE)) | |
223 | tmp_inode->i_data.a_ops->readpages = NULL; | |
966ca923 | 224 | if(isNewInode) |
dfb7533b SF |
225 | return; /* No sense invalidating pages for new inode |
226 | since have not started caching readahead file | |
227 | data yet */ | |
966ca923 SF |
228 | |
229 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
230 | (local_size == tmp_inode->i_size)) { | |
231 | cFYI(1, ("inode exists but unchanged")); | |
232 | } else { | |
233 | /* file may have changed on server */ | |
234 | cFYI(1, ("invalidate inode, readdir detected change")); | |
235 | invalidate_remote_inode(tmp_inode); | |
236 | } | |
1da177e4 | 237 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
966ca923 | 238 | cFYI(1, ("Directory inode")); |
1da177e4 LT |
239 | tmp_inode->i_op = &cifs_dir_inode_ops; |
240 | tmp_inode->i_fop = &cifs_dir_ops; | |
241 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
966ca923 | 242 | cFYI(1, ("Symbolic Link inode")); |
1da177e4 LT |
243 | tmp_inode->i_op = &cifs_symlink_inode_ops; |
244 | } else { | |
966ca923 | 245 | cFYI(1, ("Init special inode")); |
1da177e4 LT |
246 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
247 | tmp_inode->i_rdev); | |
248 | } | |
249 | } | |
250 | ||
251 | static void unix_fill_in_inode(struct inode *tmp_inode, | |
966ca923 | 252 | FILE_UNIX_INFO *pfindData, int *pobject_type, int isNewInode) |
1da177e4 | 253 | { |
966ca923 SF |
254 | loff_t local_size; |
255 | struct timespec local_mtime; | |
256 | ||
1da177e4 LT |
257 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
258 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
259 | ||
260 | __u32 type = le32_to_cpu(pfindData->Type); | |
261 | __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes); | |
262 | __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile); | |
263 | cifsInfo->time = jiffies; | |
264 | atomic_inc(&cifsInfo->inUse); | |
265 | ||
966ca923 SF |
266 | /* save mtime and size */ |
267 | local_mtime = tmp_inode->i_mtime; | |
268 | local_size = tmp_inode->i_size; | |
269 | ||
1da177e4 LT |
270 | tmp_inode->i_atime = |
271 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); | |
272 | tmp_inode->i_mtime = | |
273 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime)); | |
274 | tmp_inode->i_ctime = | |
275 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange)); | |
276 | ||
277 | tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions); | |
3020a1f5 SF |
278 | /* since we set the inode type below we need to mask off type |
279 | to avoid strange results if bits above were corrupt */ | |
280 | tmp_inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
281 | if (type == UNIX_FILE) { |
282 | *pobject_type = DT_REG; | |
283 | tmp_inode->i_mode |= S_IFREG; | |
284 | } else if (type == UNIX_SYMLINK) { | |
285 | *pobject_type = DT_LNK; | |
286 | tmp_inode->i_mode |= S_IFLNK; | |
287 | } else if (type == UNIX_DIR) { | |
288 | *pobject_type = DT_DIR; | |
289 | tmp_inode->i_mode |= S_IFDIR; | |
290 | } else if (type == UNIX_CHARDEV) { | |
291 | *pobject_type = DT_CHR; | |
292 | tmp_inode->i_mode |= S_IFCHR; | |
293 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
294 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
295 | } else if (type == UNIX_BLOCKDEV) { | |
296 | *pobject_type = DT_BLK; | |
297 | tmp_inode->i_mode |= S_IFBLK; | |
298 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
299 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
300 | } else if (type == UNIX_FIFO) { | |
301 | *pobject_type = DT_FIFO; | |
302 | tmp_inode->i_mode |= S_IFIFO; | |
303 | } else if (type == UNIX_SOCKET) { | |
304 | *pobject_type = DT_SOCK; | |
305 | tmp_inode->i_mode |= S_IFSOCK; | |
3020a1f5 SF |
306 | } else { |
307 | /* safest to just call it a file */ | |
308 | *pobject_type = DT_REG; | |
309 | tmp_inode->i_mode |= S_IFREG; | |
310 | cFYI(1,("unknown inode type %d",type)); | |
1da177e4 LT |
311 | } |
312 | ||
313 | tmp_inode->i_uid = le64_to_cpu(pfindData->Uid); | |
314 | tmp_inode->i_gid = le64_to_cpu(pfindData->Gid); | |
315 | tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks); | |
316 | ||
317 | if (is_size_safe_to_change(cifsInfo)) { | |
318 | /* can not safely change the file size here if the | |
319 | client is writing to it due to potential races */ | |
320 | i_size_write(tmp_inode,end_of_file); | |
321 | ||
322 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
323 | /* for this calculation, not the real blocksize */ | |
324 | tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; | |
325 | } | |
326 | ||
327 | if (S_ISREG(tmp_inode->i_mode)) { | |
328 | cFYI(1, ("File inode")); | |
329 | tmp_inode->i_op = &cifs_file_inode_ops; | |
f3f6ec4b SF |
330 | |
331 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { | |
332 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
333 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; | |
334 | else | |
335 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
336 | ||
337 | } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
338 | tmp_inode->i_fop = &cifs_file_nobrl_ops; | |
1da177e4 LT |
339 | else |
340 | tmp_inode->i_fop = &cifs_file_ops; | |
f3f6ec4b | 341 | |
1da177e4 | 342 | tmp_inode->i_data.a_ops = &cifs_addr_ops; |
bfa0d75a SF |
343 | if((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
344 | (cifs_sb->tcon->ses->server->maxBuf < | |
345 | 4096 + MAX_CIFS_HDR_SIZE)) | |
346 | tmp_inode->i_data.a_ops->readpages = NULL; | |
966ca923 SF |
347 | |
348 | if(isNewInode) | |
349 | return; /* No sense invalidating pages for new inode since we | |
350 | have not started caching readahead file data yet */ | |
351 | ||
352 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
353 | (local_size == tmp_inode->i_size)) { | |
354 | cFYI(1, ("inode exists but unchanged")); | |
355 | } else { | |
356 | /* file may have changed on server */ | |
357 | cFYI(1, ("invalidate inode, readdir detected change")); | |
358 | invalidate_remote_inode(tmp_inode); | |
359 | } | |
1da177e4 LT |
360 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
361 | cFYI(1, ("Directory inode")); | |
362 | tmp_inode->i_op = &cifs_dir_inode_ops; | |
363 | tmp_inode->i_fop = &cifs_dir_ops; | |
364 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
365 | cFYI(1, ("Symbolic Link inode")); | |
366 | tmp_inode->i_op = &cifs_symlink_inode_ops; | |
367 | /* tmp_inode->i_fop = *//* do not need to set to anything */ | |
368 | } else { | |
369 | cFYI(1, ("Special inode")); | |
370 | init_special_inode(tmp_inode, tmp_inode->i_mode, | |
371 | tmp_inode->i_rdev); | |
372 | } | |
373 | } | |
374 | ||
375 | static int initiate_cifs_search(const int xid, struct file *file) | |
376 | { | |
377 | int rc = 0; | |
378 | char * full_path; | |
379 | struct cifsFileInfo * cifsFile; | |
380 | struct cifs_sb_info *cifs_sb; | |
381 | struct cifsTconInfo *pTcon; | |
382 | ||
383 | if(file->private_data == NULL) { | |
384 | file->private_data = | |
385 | kmalloc(sizeof(struct cifsFileInfo),GFP_KERNEL); | |
386 | } | |
387 | ||
388 | if(file->private_data == NULL) { | |
389 | return -ENOMEM; | |
390 | } else { | |
391 | memset(file->private_data,0,sizeof(struct cifsFileInfo)); | |
392 | } | |
393 | cifsFile = file->private_data; | |
394 | cifsFile->invalidHandle = TRUE; | |
395 | cifsFile->srch_inf.endOfSearch = FALSE; | |
396 | ||
397 | if(file->f_dentry == NULL) | |
398 | return -ENOENT; | |
399 | ||
400 | cifs_sb = CIFS_SB(file->f_dentry->d_sb); | |
401 | if(cifs_sb == NULL) | |
402 | return -EINVAL; | |
403 | ||
404 | pTcon = cifs_sb->tcon; | |
405 | if(pTcon == NULL) | |
406 | return -EINVAL; | |
407 | ||
7f57356b | 408 | full_path = build_path_from_dentry(file->f_dentry); |
1da177e4 LT |
409 | |
410 | if(full_path == NULL) { | |
411 | return -ENOMEM; | |
412 | } | |
413 | ||
966ca923 | 414 | cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos)); |
1da177e4 | 415 | |
75cf6bdc | 416 | ffirst_retry: |
1da177e4 LT |
417 | /* test for Unix extensions */ |
418 | if (pTcon->ses->capabilities & CAP_UNIX) { | |
419 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX; | |
420 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { | |
421 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; | |
422 | } else /* not srvinos - BB fixme add check for backlevel? */ { | |
423 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
424 | } | |
425 | ||
737b758c SF |
426 | rc = CIFSFindFirst(xid, pTcon,full_path,cifs_sb->local_nls, |
427 | &cifsFile->netfid, &cifsFile->srch_inf, | |
eafe8701 SF |
428 | cifs_sb->mnt_cifs_flags & |
429 | CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); | |
1da177e4 LT |
430 | if(rc == 0) |
431 | cifsFile->invalidHandle = FALSE; | |
75cf6bdc SF |
432 | if((rc == -EOPNOTSUPP) && |
433 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { | |
434 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; | |
435 | goto ffirst_retry; | |
436 | } | |
1da177e4 LT |
437 | kfree(full_path); |
438 | return rc; | |
439 | } | |
440 | ||
441 | /* return length of unicode string in bytes */ | |
442 | static int cifs_unicode_bytelen(char *str) | |
443 | { | |
444 | int len; | |
445 | __le16 * ustr = (__le16 *)str; | |
446 | ||
447 | for(len=0;len <= PATH_MAX;len++) { | |
448 | if(ustr[len] == 0) | |
449 | return len << 1; | |
450 | } | |
451 | cFYI(1,("Unicode string longer than PATH_MAX found")); | |
452 | return len << 1; | |
453 | } | |
454 | ||
455 | static char *nxt_dir_entry(char *old_entry, char *end_of_smb) | |
456 | { | |
457 | char * new_entry; | |
458 | FILE_DIRECTORY_INFO * pDirInfo = (FILE_DIRECTORY_INFO *)old_entry; | |
459 | ||
460 | new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset); | |
461 | cFYI(1,("new entry %p old entry %p",new_entry,old_entry)); | |
462 | /* validate that new_entry is not past end of SMB */ | |
463 | if(new_entry >= end_of_smb) { | |
09d1db5c SF |
464 | cERROR(1, |
465 | ("search entry %p began after end of SMB %p old entry %p", | |
466 | new_entry, end_of_smb, old_entry)); | |
1da177e4 | 467 | return NULL; |
09d1db5c SF |
468 | } else if (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb) { |
469 | cERROR(1,("search entry %p extends after end of SMB %p", | |
470 | new_entry, end_of_smb)); | |
471 | return NULL; | |
472 | } else | |
1da177e4 LT |
473 | return new_entry; |
474 | ||
475 | } | |
476 | ||
477 | #define UNICODE_DOT cpu_to_le16(0x2e) | |
478 | ||
479 | /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */ | |
480 | static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile) | |
481 | { | |
482 | int rc = 0; | |
483 | char * filename = NULL; | |
484 | int len = 0; | |
485 | ||
486 | if(cfile->srch_inf.info_level == 0x202) { | |
487 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; | |
488 | filename = &pFindData->FileName[0]; | |
489 | if(cfile->srch_inf.unicode) { | |
490 | len = cifs_unicode_bytelen(filename); | |
491 | } else { | |
492 | /* BB should we make this strnlen of PATH_MAX? */ | |
493 | len = strnlen(filename, 5); | |
494 | } | |
495 | } else if(cfile->srch_inf.info_level == 0x101) { | |
496 | FILE_DIRECTORY_INFO * pFindData = | |
497 | (FILE_DIRECTORY_INFO *)current_entry; | |
498 | filename = &pFindData->FileName[0]; | |
499 | len = le32_to_cpu(pFindData->FileNameLength); | |
500 | } else if(cfile->srch_inf.info_level == 0x102) { | |
501 | FILE_FULL_DIRECTORY_INFO * pFindData = | |
502 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
503 | filename = &pFindData->FileName[0]; | |
504 | len = le32_to_cpu(pFindData->FileNameLength); | |
505 | } else if(cfile->srch_inf.info_level == 0x105) { | |
506 | SEARCH_ID_FULL_DIR_INFO * pFindData = | |
507 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
508 | filename = &pFindData->FileName[0]; | |
509 | len = le32_to_cpu(pFindData->FileNameLength); | |
510 | } else if(cfile->srch_inf.info_level == 0x104) { | |
511 | FILE_BOTH_DIRECTORY_INFO * pFindData = | |
512 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
513 | filename = &pFindData->FileName[0]; | |
514 | len = le32_to_cpu(pFindData->FileNameLength); | |
515 | } else { | |
516 | cFYI(1,("Unknown findfirst level %d",cfile->srch_inf.info_level)); | |
517 | } | |
518 | ||
519 | if(filename) { | |
520 | if(cfile->srch_inf.unicode) { | |
521 | __le16 *ufilename = (__le16 *)filename; | |
522 | if(len == 2) { | |
523 | /* check for . */ | |
524 | if(ufilename[0] == UNICODE_DOT) | |
525 | rc = 1; | |
526 | } else if(len == 4) { | |
527 | /* check for .. */ | |
528 | if((ufilename[0] == UNICODE_DOT) | |
529 | &&(ufilename[1] == UNICODE_DOT)) | |
530 | rc = 2; | |
531 | } | |
532 | } else /* ASCII */ { | |
533 | if(len == 1) { | |
534 | if(filename[0] == '.') | |
535 | rc = 1; | |
536 | } else if(len == 2) { | |
537 | if((filename[0] == '.') && (filename[1] == '.')) | |
538 | rc = 2; | |
539 | } | |
540 | } | |
541 | } | |
542 | ||
543 | return rc; | |
544 | } | |
545 | ||
eafe8701 SF |
546 | /* Check if directory that we are searching has changed so we can decide |
547 | whether we can use the cached search results from the previous search */ | |
548 | static int is_dir_changed(struct file * file) | |
549 | { | |
550 | struct inode * inode; | |
551 | struct cifsInodeInfo *cifsInfo; | |
552 | ||
553 | if(file->f_dentry == NULL) | |
554 | return 0; | |
555 | ||
556 | inode = file->f_dentry->d_inode; | |
557 | ||
558 | if(inode == NULL) | |
559 | return 0; | |
560 | ||
561 | cifsInfo = CIFS_I(inode); | |
562 | ||
563 | if(cifsInfo->time == 0) | |
564 | return 1; /* directory was changed, perhaps due to unlink */ | |
565 | else | |
566 | return 0; | |
567 | ||
568 | } | |
569 | ||
1da177e4 LT |
570 | /* find the corresponding entry in the search */ |
571 | /* Note that the SMB server returns search entries for . and .. which | |
572 | complicates logic here if we choose to parse for them and we do not | |
573 | assume that they are located in the findfirst return buffer.*/ | |
574 | /* We start counting in the buffer with entry 2 and increment for every | |
575 | entry (do not increment for . or .. entry) */ | |
576 | static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon, | |
577 | struct file *file, char **ppCurrentEntry, int *num_to_ret) | |
578 | { | |
579 | int rc = 0; | |
580 | int pos_in_buf = 0; | |
581 | loff_t first_entry_in_buffer; | |
582 | loff_t index_to_find = file->f_pos; | |
583 | struct cifsFileInfo * cifsFile = file->private_data; | |
584 | /* check if index in the buffer */ | |
585 | ||
eafe8701 SF |
586 | if((cifsFile == NULL) || (ppCurrentEntry == NULL) || |
587 | (num_to_ret == NULL)) | |
1da177e4 LT |
588 | return -ENOENT; |
589 | ||
590 | *ppCurrentEntry = NULL; | |
591 | first_entry_in_buffer = | |
592 | cifsFile->srch_inf.index_of_last_entry - | |
593 | cifsFile->srch_inf.entries_in_buffer; | |
60808233 SF |
594 | |
595 | /* if first entry in buf is zero then is first buffer | |
596 | in search response data which means it is likely . and .. | |
597 | will be in this buffer, although some servers do not return | |
598 | . and .. for the root of a drive and for those we need | |
599 | to start two entries earlier */ | |
600 | ||
3979877e SF |
601 | #ifdef CONFIG_CIFS_DEBUG2 |
602 | dump_cifs_file_struct(file, "In fce "); | |
603 | #endif | |
eafe8701 SF |
604 | if(((index_to_find < cifsFile->srch_inf.index_of_last_entry) && |
605 | is_dir_changed(file)) || | |
606 | (index_to_find < first_entry_in_buffer)) { | |
1da177e4 LT |
607 | /* close and restart search */ |
608 | cFYI(1,("search backing up - close and restart search")); | |
609 | cifsFile->invalidHandle = TRUE; | |
610 | CIFSFindClose(xid, pTcon, cifsFile->netfid); | |
611 | kfree(cifsFile->search_resume_name); | |
612 | cifsFile->search_resume_name = NULL; | |
613 | if(cifsFile->srch_inf.ntwrk_buf_start) { | |
614 | cFYI(1,("freeing SMB ff cache buf on search rewind")); | |
d47d7c1a SF |
615 | if(cifsFile->srch_inf.smallBuf) |
616 | cifs_small_buf_release(cifsFile->srch_inf. | |
617 | ntwrk_buf_start); | |
618 | else | |
619 | cifs_buf_release(cifsFile->srch_inf. | |
620 | ntwrk_buf_start); | |
1da177e4 LT |
621 | } |
622 | rc = initiate_cifs_search(xid,file); | |
623 | if(rc) { | |
624 | cFYI(1,("error %d reinitiating a search on rewind",rc)); | |
625 | return rc; | |
626 | } | |
627 | } | |
628 | ||
629 | while((index_to_find >= cifsFile->srch_inf.index_of_last_entry) && | |
630 | (rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)){ | |
631 | cFYI(1,("calling findnext2")); | |
dfb7533b SF |
632 | rc = CIFSFindNext(xid,pTcon,cifsFile->netfid, |
633 | &cifsFile->srch_inf); | |
1da177e4 LT |
634 | if(rc) |
635 | return -ENOENT; | |
636 | } | |
637 | if(index_to_find < cifsFile->srch_inf.index_of_last_entry) { | |
638 | /* we found the buffer that contains the entry */ | |
639 | /* scan and find it */ | |
640 | int i; | |
641 | char * current_entry; | |
642 | char * end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + | |
643 | smbCalcSize((struct smb_hdr *) | |
644 | cifsFile->srch_inf.ntwrk_buf_start); | |
60808233 SF |
645 | |
646 | current_entry = cifsFile->srch_inf.srch_entries_start; | |
1da177e4 LT |
647 | first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry |
648 | - cifsFile->srch_inf.entries_in_buffer; | |
649 | pos_in_buf = index_to_find - first_entry_in_buffer; | |
650 | cFYI(1,("found entry - pos_in_buf %d",pos_in_buf)); | |
1da177e4 | 651 | for(i=0;(i<(pos_in_buf)) && (current_entry != NULL);i++) { |
dfb7533b | 652 | /* go entry by entry figuring out which is first */ |
1da177e4 LT |
653 | current_entry = nxt_dir_entry(current_entry,end_of_smb); |
654 | } | |
655 | if((current_entry == NULL) && (i < pos_in_buf)) { | |
656 | /* BB fixme - check if we should flag this error */ | |
657 | cERROR(1,("reached end of buf searching for pos in buf" | |
658 | " %d index to find %lld rc %d", | |
659 | pos_in_buf,index_to_find,rc)); | |
660 | } | |
661 | rc = 0; | |
662 | *ppCurrentEntry = current_entry; | |
663 | } else { | |
664 | cFYI(1,("index not in buffer - could not findnext into it")); | |
665 | return 0; | |
666 | } | |
667 | ||
668 | if(pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) { | |
eafe8701 | 669 | cFYI(1,("can not return entries pos_in_buf beyond last entry")); |
1da177e4 LT |
670 | *num_to_ret = 0; |
671 | } else | |
672 | *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf; | |
1da177e4 LT |
673 | |
674 | return rc; | |
675 | } | |
676 | ||
677 | /* inode num, inode type and filename returned */ | |
678 | static int cifs_get_name_from_search_buf(struct qstr *pqst, | |
679 | char *current_entry, __u16 level, unsigned int unicode, | |
680 | struct cifs_sb_info * cifs_sb, ino_t *pinum) | |
681 | { | |
682 | int rc = 0; | |
683 | unsigned int len = 0; | |
684 | char * filename; | |
685 | struct nls_table * nlt = cifs_sb->local_nls; | |
686 | ||
687 | *pinum = 0; | |
688 | ||
689 | if(level == SMB_FIND_FILE_UNIX) { | |
690 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; | |
691 | ||
692 | filename = &pFindData->FileName[0]; | |
693 | if(unicode) { | |
694 | len = cifs_unicode_bytelen(filename); | |
695 | } else { | |
696 | /* BB should we make this strnlen of PATH_MAX? */ | |
697 | len = strnlen(filename, PATH_MAX); | |
698 | } | |
699 | ||
700 | /* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */ | |
701 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
702 | *pinum = pFindData->UniqueId; | |
703 | } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) { | |
704 | FILE_DIRECTORY_INFO * pFindData = | |
705 | (FILE_DIRECTORY_INFO *)current_entry; | |
706 | filename = &pFindData->FileName[0]; | |
707 | len = le32_to_cpu(pFindData->FileNameLength); | |
708 | } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { | |
709 | FILE_FULL_DIRECTORY_INFO * pFindData = | |
710 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
711 | filename = &pFindData->FileName[0]; | |
712 | len = le32_to_cpu(pFindData->FileNameLength); | |
713 | } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { | |
714 | SEARCH_ID_FULL_DIR_INFO * pFindData = | |
715 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
716 | filename = &pFindData->FileName[0]; | |
717 | len = le32_to_cpu(pFindData->FileNameLength); | |
718 | *pinum = pFindData->UniqueId; | |
719 | } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { | |
720 | FILE_BOTH_DIRECTORY_INFO * pFindData = | |
721 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
722 | filename = &pFindData->FileName[0]; | |
723 | len = le32_to_cpu(pFindData->FileNameLength); | |
724 | } else { | |
725 | cFYI(1,("Unknown findfirst level %d",level)); | |
726 | return -EINVAL; | |
727 | } | |
728 | if(unicode) { | |
729 | /* BB fixme - test with long names */ | |
730 | /* Note converted filename can be longer than in unicode */ | |
6a0b4824 SF |
731 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) |
732 | pqst->len = cifs_convertUCSpath((char *)pqst->name, | |
733 | (__le16 *)filename, len/2, nlt); | |
734 | else | |
6a0b4824 | 735 | pqst->len = cifs_strfromUCS_le((char *)pqst->name, |
e89dc920 | 736 | (__le16 *)filename,len/2,nlt); |
1da177e4 LT |
737 | } else { |
738 | pqst->name = filename; | |
739 | pqst->len = len; | |
740 | } | |
741 | pqst->hash = full_name_hash(pqst->name,pqst->len); | |
742 | /* cFYI(1,("filldir on %s",pqst->name)); */ | |
743 | return rc; | |
744 | } | |
745 | ||
746 | static int cifs_filldir(char *pfindEntry, struct file *file, | |
747 | filldir_t filldir, void *direntry, char *scratch_buf) | |
748 | { | |
749 | int rc = 0; | |
750 | struct qstr qstring; | |
751 | struct cifsFileInfo * pCifsF; | |
752 | unsigned obj_type; | |
753 | ino_t inum; | |
754 | struct cifs_sb_info * cifs_sb; | |
755 | struct inode *tmp_inode; | |
756 | struct dentry *tmp_dentry; | |
757 | ||
758 | /* get filename and len into qstring */ | |
759 | /* get dentry */ | |
760 | /* decide whether to create and populate ionde */ | |
761 | if((direntry == NULL) || (file == NULL)) | |
762 | return -EINVAL; | |
763 | ||
764 | pCifsF = file->private_data; | |
765 | ||
766 | if((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL)) | |
767 | return -ENOENT; | |
768 | ||
769 | if(file->f_dentry == NULL) | |
770 | return -ENOENT; | |
771 | ||
b66ac3ea | 772 | rc = cifs_entry_is_dot(pfindEntry,pCifsF); |
60808233 SF |
773 | /* skip . and .. since we added them first */ |
774 | if(rc != 0) | |
775 | return 0; | |
776 | ||
1da177e4 LT |
777 | cifs_sb = CIFS_SB(file->f_dentry->d_sb); |
778 | ||
779 | qstring.name = scratch_buf; | |
780 | rc = cifs_get_name_from_search_buf(&qstring,pfindEntry, | |
781 | pCifsF->srch_inf.info_level, | |
782 | pCifsF->srch_inf.unicode,cifs_sb, | |
783 | &inum /* returned */); | |
784 | ||
785 | if(rc) | |
786 | return rc; | |
787 | ||
788 | rc = construct_dentry(&qstring,file,&tmp_inode, &tmp_dentry); | |
789 | if((tmp_inode == NULL) || (tmp_dentry == NULL)) | |
790 | return -ENOMEM; | |
791 | ||
792 | if(rc) { | |
793 | /* inode created, we need to hash it with right inode number */ | |
794 | if(inum != 0) { | |
795 | /* BB fixme - hash the 2 32 quantities bits together if necessary BB */ | |
796 | tmp_inode->i_ino = inum; | |
797 | } | |
798 | insert_inode_hash(tmp_inode); | |
799 | } | |
800 | ||
966ca923 SF |
801 | /* we pass in rc below, indicating whether it is a new inode, |
802 | so we can figure out whether to invalidate the inode cached | |
803 | data if the file has changed */ | |
1da177e4 | 804 | if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) { |
966ca923 SF |
805 | unix_fill_in_inode(tmp_inode, |
806 | (FILE_UNIX_INFO *)pfindEntry,&obj_type, rc); | |
1da177e4 | 807 | } else { |
966ca923 SF |
808 | fill_in_inode(tmp_inode, |
809 | (FILE_DIRECTORY_INFO *)pfindEntry,&obj_type, rc); | |
1da177e4 LT |
810 | } |
811 | ||
dfb7533b SF |
812 | rc = filldir(direntry,qstring.name,qstring.len,file->f_pos, |
813 | tmp_inode->i_ino,obj_type); | |
1da177e4 LT |
814 | if(rc) { |
815 | cFYI(1,("filldir rc = %d",rc)); | |
816 | } | |
817 | ||
818 | dput(tmp_dentry); | |
819 | return rc; | |
820 | } | |
821 | ||
822 | static int cifs_save_resume_key(const char *current_entry, | |
823 | struct cifsFileInfo *cifsFile) | |
824 | { | |
825 | int rc = 0; | |
826 | unsigned int len = 0; | |
827 | __u16 level; | |
828 | char * filename; | |
829 | ||
830 | if((cifsFile == NULL) || (current_entry == NULL)) | |
831 | return -EINVAL; | |
832 | ||
833 | level = cifsFile->srch_inf.info_level; | |
834 | ||
835 | if(level == SMB_FIND_FILE_UNIX) { | |
836 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; | |
837 | ||
838 | filename = &pFindData->FileName[0]; | |
839 | if(cifsFile->srch_inf.unicode) { | |
840 | len = cifs_unicode_bytelen(filename); | |
841 | } else { | |
842 | /* BB should we make this strnlen of PATH_MAX? */ | |
843 | len = strnlen(filename, PATH_MAX); | |
844 | } | |
845 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; | |
846 | } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) { | |
847 | FILE_DIRECTORY_INFO * pFindData = | |
848 | (FILE_DIRECTORY_INFO *)current_entry; | |
849 | filename = &pFindData->FileName[0]; | |
850 | len = le32_to_cpu(pFindData->FileNameLength); | |
851 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
852 | } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { | |
853 | FILE_FULL_DIRECTORY_INFO * pFindData = | |
854 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
855 | filename = &pFindData->FileName[0]; | |
856 | len = le32_to_cpu(pFindData->FileNameLength); | |
857 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
858 | } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { | |
859 | SEARCH_ID_FULL_DIR_INFO * pFindData = | |
860 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
861 | filename = &pFindData->FileName[0]; | |
862 | len = le32_to_cpu(pFindData->FileNameLength); | |
863 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
864 | } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { | |
865 | FILE_BOTH_DIRECTORY_INFO * pFindData = | |
866 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
867 | filename = &pFindData->FileName[0]; | |
868 | len = le32_to_cpu(pFindData->FileNameLength); | |
869 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
870 | } else { | |
871 | cFYI(1,("Unknown findfirst level %d",level)); | |
872 | return -EINVAL; | |
873 | } | |
874 | cifsFile->srch_inf.resume_name_len = len; | |
875 | cifsFile->srch_inf.presume_name = filename; | |
876 | return rc; | |
877 | } | |
878 | ||
879 | int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) | |
880 | { | |
881 | int rc = 0; | |
882 | int xid,i; | |
883 | struct cifs_sb_info *cifs_sb; | |
884 | struct cifsTconInfo *pTcon; | |
885 | struct cifsFileInfo *cifsFile = NULL; | |
886 | char * current_entry; | |
887 | int num_to_fill = 0; | |
888 | char * tmp_buf = NULL; | |
889 | char * end_of_smb; | |
890 | ||
891 | xid = GetXid(); | |
892 | ||
893 | if(file->f_dentry == NULL) { | |
894 | FreeXid(xid); | |
895 | return -EIO; | |
896 | } | |
1da177e4 LT |
897 | |
898 | cifs_sb = CIFS_SB(file->f_dentry->d_sb); | |
899 | pTcon = cifs_sb->tcon; | |
900 | if(pTcon == NULL) | |
901 | return -EINVAL; | |
902 | ||
1da177e4 LT |
903 | switch ((int) file->f_pos) { |
904 | case 0: | |
60808233 | 905 | if (filldir(direntry, ".", 1, file->f_pos, |
1da177e4 | 906 | file->f_dentry->d_inode->i_ino, DT_DIR) < 0) { |
60808233 | 907 | cERROR(1, ("Filldir for current dir failed")); |
1da177e4 LT |
908 | rc = -ENOMEM; |
909 | break; | |
910 | } | |
60808233 | 911 | file->f_pos++; |
1da177e4 | 912 | case 1: |
60808233 | 913 | if (filldir(direntry, "..", 2, file->f_pos, |
1da177e4 | 914 | file->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) { |
26a21b98 | 915 | cERROR(1, ("Filldir for parent dir failed")); |
1da177e4 LT |
916 | rc = -ENOMEM; |
917 | break; | |
918 | } | |
60808233 SF |
919 | file->f_pos++; |
920 | default: | |
1da177e4 LT |
921 | /* 1) If search is active, |
922 | is in current search buffer? | |
923 | if it before then restart search | |
924 | if after then keep searching till find it */ | |
925 | ||
926 | if(file->private_data == NULL) { | |
927 | rc = initiate_cifs_search(xid,file); | |
928 | cFYI(1,("initiate cifs search rc %d",rc)); | |
929 | if(rc) { | |
930 | FreeXid(xid); | |
931 | return rc; | |
932 | } | |
933 | } | |
1da177e4 LT |
934 | if(file->private_data == NULL) { |
935 | rc = -EINVAL; | |
936 | FreeXid(xid); | |
937 | return rc; | |
938 | } | |
939 | cifsFile = file->private_data; | |
940 | if (cifsFile->srch_inf.endOfSearch) { | |
941 | if(cifsFile->srch_inf.emptyDir) { | |
942 | cFYI(1, ("End of search, empty dir")); | |
943 | rc = 0; | |
944 | break; | |
945 | } | |
946 | } /* else { | |
947 | cifsFile->invalidHandle = TRUE; | |
948 | CIFSFindClose(xid, pTcon, cifsFile->netfid); | |
949 | } | |
950 | kfree(cifsFile->search_resume_name); | |
951 | cifsFile->search_resume_name = NULL; */ | |
952 | ||
1da177e4 LT |
953 | rc = find_cifs_entry(xid,pTcon, file, |
954 | ¤t_entry,&num_to_fill); | |
955 | if(rc) { | |
956 | cFYI(1,("fce error %d",rc)); | |
957 | goto rddir2_exit; | |
958 | } else if (current_entry != NULL) { | |
959 | cFYI(1,("entry %lld found",file->f_pos)); | |
960 | } else { | |
961 | cFYI(1,("could not find entry")); | |
962 | goto rddir2_exit; | |
963 | } | |
964 | cFYI(1,("loop through %d times filling dir for net buf %p", | |
965 | num_to_fill,cifsFile->srch_inf.ntwrk_buf_start)); | |
966 | end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + | |
967 | smbCalcSize((struct smb_hdr *) | |
968 | cifsFile->srch_inf.ntwrk_buf_start); | |
6a0b4824 SF |
969 | /* To be safe - for UCS to UTF-8 with strings loaded |
970 | with the rare long characters alloc more to account for | |
971 | such multibyte target UTF-8 characters. cifs_unicode.c, | |
972 | which actually does the conversion, has the same limit */ | |
973 | tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL); | |
1da177e4 LT |
974 | for(i=0;(i<num_to_fill) && (rc == 0);i++) { |
975 | if(current_entry == NULL) { | |
976 | /* evaluate whether this case is an error */ | |
977 | cERROR(1,("past end of SMB num to fill %d i %d", | |
978 | num_to_fill, i)); | |
979 | break; | |
980 | } | |
60808233 SF |
981 | /* if buggy server returns . and .. late do |
982 | we want to check for that here? */ | |
1da177e4 LT |
983 | rc = cifs_filldir(current_entry, file, |
984 | filldir, direntry,tmp_buf); | |
985 | file->f_pos++; | |
3979877e SF |
986 | if(file->f_pos == |
987 | cifsFile->srch_inf.index_of_last_entry) { | |
1da177e4 | 988 | cFYI(1,("last entry in buf at pos %lld %s", |
3979877e | 989 | file->f_pos,tmp_buf)); |
1da177e4 LT |
990 | cifs_save_resume_key(current_entry,cifsFile); |
991 | break; | |
992 | } else | |
dfb7533b SF |
993 | current_entry = nxt_dir_entry(current_entry, |
994 | end_of_smb); | |
1da177e4 LT |
995 | } |
996 | kfree(tmp_buf); | |
997 | break; | |
998 | } /* end switch */ | |
999 | ||
1000 | rddir2_exit: | |
1da177e4 LT |
1001 | FreeXid(xid); |
1002 | return rc; | |
1003 | } |