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