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> | |
273d81d6 | 24 | #include <linux/pagemap.h> |
1da177e4 LT |
25 | #include <linux/stat.h> |
26 | #include <linux/smp_lock.h> | |
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 | ||
3979877e SF |
35 | #ifdef CONFIG_CIFS_DEBUG2 |
36 | static void dump_cifs_file_struct(struct file *file, char *label) | |
1da177e4 LT |
37 | { |
38 | struct cifsFileInfo * cf; | |
39 | ||
40 | if(file) { | |
41 | cf = file->private_data; | |
42 | if(cf == NULL) { | |
43 | cFYI(1,("empty cifs private file data")); | |
44 | return; | |
45 | } | |
46 | if(cf->invalidHandle) { | |
47 | cFYI(1,("invalid handle")); | |
48 | } | |
49 | if(cf->srch_inf.endOfSearch) { | |
50 | cFYI(1,("end of search")); | |
51 | } | |
52 | if(cf->srch_inf.emptyDir) { | |
53 | cFYI(1,("empty dir")); | |
54 | } | |
55 | ||
56 | } | |
3979877e SF |
57 | } |
58 | #endif /* DEBUG2 */ | |
1da177e4 LT |
59 | |
60 | /* Returns one if new inode created (which therefore needs to be hashed) */ | |
61 | /* Might check in the future if inode number changed so we can rehash inode */ | |
62 | static int construct_dentry(struct qstr *qstring, struct file *file, | |
63 | struct inode **ptmp_inode, struct dentry **pnew_dentry) | |
64 | { | |
65 | struct dentry *tmp_dentry; | |
66 | struct cifs_sb_info *cifs_sb; | |
67 | struct cifsTconInfo *pTcon; | |
68 | int rc = 0; | |
69 | ||
966ca923 | 70 | cFYI(1, ("For %s", qstring->name)); |
1da177e4 LT |
71 | cifs_sb = CIFS_SB(file->f_dentry->d_sb); |
72 | pTcon = cifs_sb->tcon; | |
73 | ||
74 | qstring->hash = full_name_hash(qstring->name, qstring->len); | |
75 | tmp_dentry = d_lookup(file->f_dentry, qstring); | |
76 | if (tmp_dentry) { | |
966ca923 | 77 | cFYI(0, ("existing dentry with inode 0x%p", tmp_dentry->d_inode)); |
1da177e4 LT |
78 | *ptmp_inode = tmp_dentry->d_inode; |
79 | /* BB overwrite old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len??*/ | |
80 | if(*ptmp_inode == NULL) { | |
81 | *ptmp_inode = new_inode(file->f_dentry->d_sb); | |
82 | if(*ptmp_inode == NULL) | |
83 | return rc; | |
84 | rc = 1; | |
85 | d_instantiate(tmp_dentry, *ptmp_inode); | |
86 | } | |
87 | } else { | |
88 | tmp_dentry = d_alloc(file->f_dentry, qstring); | |
89 | if(tmp_dentry == NULL) { | |
90 | cERROR(1,("Failed allocating dentry")); | |
91 | *ptmp_inode = NULL; | |
92 | return rc; | |
93 | } | |
94 | ||
95 | *ptmp_inode = new_inode(file->f_dentry->d_sb); | |
b92327fe SF |
96 | if (pTcon->nocase) |
97 | tmp_dentry->d_op = &cifs_ci_dentry_ops; | |
98 | else | |
99 | tmp_dentry->d_op = &cifs_dentry_ops; | |
1da177e4 LT |
100 | if(*ptmp_inode == NULL) |
101 | return rc; | |
102 | rc = 1; | |
103 | d_instantiate(tmp_dentry, *ptmp_inode); | |
104 | d_rehash(tmp_dentry); | |
105 | } | |
106 | ||
107 | tmp_dentry->d_time = jiffies; | |
108 | *pnew_dentry = tmp_dentry; | |
109 | return rc; | |
110 | } | |
111 | ||
5bafd765 SF |
112 | static void fill_in_inode(struct inode *tmp_inode, int new_buf_type, |
113 | char * buf, int *pobject_type, int isNewInode) | |
1da177e4 | 114 | { |
966ca923 SF |
115 | loff_t local_size; |
116 | struct timespec local_mtime; | |
117 | ||
1da177e4 LT |
118 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
119 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
5bafd765 SF |
120 | __u32 attr; |
121 | __u64 allocation_size; | |
122 | __u64 end_of_file; | |
1da177e4 | 123 | |
966ca923 SF |
124 | /* save mtime and size */ |
125 | local_mtime = tmp_inode->i_mtime; | |
126 | local_size = tmp_inode->i_size; | |
127 | ||
5bafd765 SF |
128 | if(new_buf_type) { |
129 | FILE_DIRECTORY_INFO *pfindData = (FILE_DIRECTORY_INFO *)buf; | |
130 | ||
131 | attr = le32_to_cpu(pfindData->ExtFileAttributes); | |
132 | allocation_size = le64_to_cpu(pfindData->AllocationSize); | |
133 | end_of_file = le64_to_cpu(pfindData->EndOfFile); | |
134 | tmp_inode->i_atime = | |
135 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); | |
136 | tmp_inode->i_mtime = | |
137 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime)); | |
138 | tmp_inode->i_ctime = | |
139 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime)); | |
140 | } else { /* legacy, OS2 and DOS style */ | |
141 | FIND_FILE_STANDARD_INFO * pfindData = | |
142 | (FIND_FILE_STANDARD_INFO *)buf; | |
143 | ||
144 | attr = le16_to_cpu(pfindData->Attributes); | |
145 | allocation_size = le32_to_cpu(pfindData->AllocationSize); | |
146 | end_of_file = le32_to_cpu(pfindData->DataSize); | |
147 | tmp_inode->i_atime = CURRENT_TIME; | |
148 | /* tmp_inode->i_mtime = BB FIXME - add dos time handling | |
149 | tmp_inode->i_ctime = 0; BB FIXME */ | |
150 | ||
151 | } | |
152 | ||
1da177e4 | 153 | /* Linux can not store file creation time unfortunately so ignore it */ |
5bafd765 SF |
154 | |
155 | cifsInfo->cifsAttrs = attr; | |
156 | cifsInfo->time = jiffies; | |
157 | ||
1da177e4 LT |
158 | /* treat dos attribute of read-only as read-only mode bit e.g. 555? */ |
159 | /* 2767 perms - indicate mandatory locking */ | |
160 | /* BB fill in uid and gid here? with help from winbind? | |
161 | or retrieve from NTFS stream extended attribute */ | |
162 | if (atomic_read(&cifsInfo->inUse) == 0) { | |
163 | tmp_inode->i_uid = cifs_sb->mnt_uid; | |
164 | tmp_inode->i_gid = cifs_sb->mnt_gid; | |
165 | /* set default mode. will override for dirs below */ | |
166 | tmp_inode->i_mode = cifs_sb->mnt_file_mode; | |
3020a1f5 SF |
167 | } else { |
168 | /* mask off the type bits since it gets set | |
169 | below and we do not want to get two type | |
170 | bits set */ | |
171 | tmp_inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
172 | } |
173 | ||
1da177e4 LT |
174 | if (attr & ATTR_DIRECTORY) { |
175 | *pobject_type = DT_DIR; | |
176 | /* override default perms since we do not lock dirs */ | |
177 | if(atomic_read(&cifsInfo->inUse) == 0) { | |
178 | tmp_inode->i_mode = cifs_sb->mnt_dir_mode; | |
179 | } | |
180 | tmp_inode->i_mode |= S_IFDIR; | |
eda3c029 | 181 | } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && |
3020a1f5 SF |
182 | (attr & ATTR_SYSTEM)) { |
183 | if (end_of_file == 0) { | |
184 | *pobject_type = DT_FIFO; | |
185 | tmp_inode->i_mode |= S_IFIFO; | |
186 | } else { | |
187 | /* rather than get the type here, we mark the | |
188 | inode as needing revalidate and get the real type | |
189 | (blk vs chr vs. symlink) later ie in lookup */ | |
190 | *pobject_type = DT_REG; | |
191 | tmp_inode->i_mode |= S_IFREG; | |
192 | cifsInfo->time = 0; | |
193 | } | |
1da177e4 LT |
194 | /* we no longer mark these because we could not follow them */ |
195 | /* } else if (attr & ATTR_REPARSE) { | |
196 | *pobject_type = DT_LNK; | |
197 | tmp_inode->i_mode |= S_IFLNK; */ | |
198 | } else { | |
199 | *pobject_type = DT_REG; | |
200 | tmp_inode->i_mode |= S_IFREG; | |
201 | if (attr & ATTR_READONLY) | |
202 | tmp_inode->i_mode &= ~(S_IWUGO); | |
203 | } /* could add code here - to validate if device or weird share type? */ | |
204 | ||
205 | /* can not fill in nlink here as in qpathinfo version and Unx search */ | |
206 | if (atomic_read(&cifsInfo->inUse) == 0) { | |
207 | atomic_set(&cifsInfo->inUse, 1); | |
208 | } | |
209 | ||
210 | if (is_size_safe_to_change(cifsInfo)) { | |
211 | /* can not safely change the file size here if the | |
212 | client is writing to it due to potential races */ | |
213 | i_size_write(tmp_inode, end_of_file); | |
214 | ||
215 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
216 | /* for this calculation, even though the reported blocksize is larger */ | |
217 | tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9; | |
218 | } | |
219 | ||
220 | if (allocation_size < end_of_file) | |
221 | cFYI(1, ("May be sparse file, allocation less than file size")); | |
5515eff8 AM |
222 | cFYI(1, ("File Size %ld and blocks %llu and blocksize %ld", |
223 | (unsigned long)tmp_inode->i_size, | |
224 | (unsigned long long)tmp_inode->i_blocks, | |
225 | tmp_inode->i_blksize)); | |
1da177e4 | 226 | if (S_ISREG(tmp_inode->i_mode)) { |
966ca923 | 227 | cFYI(1, ("File inode")); |
1da177e4 | 228 | tmp_inode->i_op = &cifs_file_inode_ops; |
8b94bcb9 SF |
229 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
230 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
231 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; | |
232 | else | |
233 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
234 | ||
235 | } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
236 | tmp_inode->i_fop = &cifs_file_nobrl_ops; | |
1da177e4 LT |
237 | else |
238 | tmp_inode->i_fop = &cifs_file_ops; | |
f3f6ec4b | 239 | |
bfa0d75a SF |
240 | if((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
241 | (cifs_sb->tcon->ses->server->maxBuf < | |
273d81d6 DK |
242 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
243 | tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
244 | else | |
245 | tmp_inode->i_data.a_ops = &cifs_addr_ops; | |
246 | ||
966ca923 | 247 | if(isNewInode) |
dfb7533b SF |
248 | return; /* No sense invalidating pages for new inode |
249 | since have not started caching readahead file | |
250 | data yet */ | |
966ca923 SF |
251 | |
252 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
253 | (local_size == tmp_inode->i_size)) { | |
254 | cFYI(1, ("inode exists but unchanged")); | |
255 | } else { | |
256 | /* file may have changed on server */ | |
257 | cFYI(1, ("invalidate inode, readdir detected change")); | |
258 | invalidate_remote_inode(tmp_inode); | |
259 | } | |
1da177e4 | 260 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
966ca923 | 261 | cFYI(1, ("Directory inode")); |
1da177e4 LT |
262 | tmp_inode->i_op = &cifs_dir_inode_ops; |
263 | tmp_inode->i_fop = &cifs_dir_ops; | |
264 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
966ca923 | 265 | cFYI(1, ("Symbolic Link inode")); |
1da177e4 LT |
266 | tmp_inode->i_op = &cifs_symlink_inode_ops; |
267 | } else { | |
966ca923 | 268 | cFYI(1, ("Init special inode")); |
1da177e4 LT |
269 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
270 | tmp_inode->i_rdev); | |
271 | } | |
272 | } | |
273 | ||
274 | static void unix_fill_in_inode(struct inode *tmp_inode, | |
966ca923 | 275 | FILE_UNIX_INFO *pfindData, int *pobject_type, int isNewInode) |
1da177e4 | 276 | { |
966ca923 SF |
277 | loff_t local_size; |
278 | struct timespec local_mtime; | |
279 | ||
1da177e4 LT |
280 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
281 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
282 | ||
283 | __u32 type = le32_to_cpu(pfindData->Type); | |
284 | __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes); | |
285 | __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile); | |
286 | cifsInfo->time = jiffies; | |
287 | atomic_inc(&cifsInfo->inUse); | |
288 | ||
966ca923 SF |
289 | /* save mtime and size */ |
290 | local_mtime = tmp_inode->i_mtime; | |
291 | local_size = tmp_inode->i_size; | |
292 | ||
1da177e4 LT |
293 | tmp_inode->i_atime = |
294 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); | |
295 | tmp_inode->i_mtime = | |
296 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime)); | |
297 | tmp_inode->i_ctime = | |
298 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange)); | |
299 | ||
300 | tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions); | |
3020a1f5 SF |
301 | /* since we set the inode type below we need to mask off type |
302 | to avoid strange results if bits above were corrupt */ | |
303 | tmp_inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
304 | if (type == UNIX_FILE) { |
305 | *pobject_type = DT_REG; | |
306 | tmp_inode->i_mode |= S_IFREG; | |
307 | } else if (type == UNIX_SYMLINK) { | |
308 | *pobject_type = DT_LNK; | |
309 | tmp_inode->i_mode |= S_IFLNK; | |
310 | } else if (type == UNIX_DIR) { | |
311 | *pobject_type = DT_DIR; | |
312 | tmp_inode->i_mode |= S_IFDIR; | |
313 | } else if (type == UNIX_CHARDEV) { | |
314 | *pobject_type = DT_CHR; | |
315 | tmp_inode->i_mode |= S_IFCHR; | |
316 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
317 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
318 | } else if (type == UNIX_BLOCKDEV) { | |
319 | *pobject_type = DT_BLK; | |
320 | tmp_inode->i_mode |= S_IFBLK; | |
321 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
322 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
323 | } else if (type == UNIX_FIFO) { | |
324 | *pobject_type = DT_FIFO; | |
325 | tmp_inode->i_mode |= S_IFIFO; | |
326 | } else if (type == UNIX_SOCKET) { | |
327 | *pobject_type = DT_SOCK; | |
328 | tmp_inode->i_mode |= S_IFSOCK; | |
3020a1f5 SF |
329 | } else { |
330 | /* safest to just call it a file */ | |
331 | *pobject_type = DT_REG; | |
332 | tmp_inode->i_mode |= S_IFREG; | |
333 | cFYI(1,("unknown inode type %d",type)); | |
1da177e4 LT |
334 | } |
335 | ||
336 | tmp_inode->i_uid = le64_to_cpu(pfindData->Uid); | |
337 | tmp_inode->i_gid = le64_to_cpu(pfindData->Gid); | |
338 | tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks); | |
339 | ||
340 | if (is_size_safe_to_change(cifsInfo)) { | |
341 | /* can not safely change the file size here if the | |
342 | client is writing to it due to potential races */ | |
343 | i_size_write(tmp_inode,end_of_file); | |
344 | ||
345 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
346 | /* for this calculation, not the real blocksize */ | |
347 | tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; | |
348 | } | |
349 | ||
350 | if (S_ISREG(tmp_inode->i_mode)) { | |
351 | cFYI(1, ("File inode")); | |
352 | tmp_inode->i_op = &cifs_file_inode_ops; | |
f3f6ec4b SF |
353 | |
354 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { | |
355 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
356 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; | |
357 | else | |
358 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
359 | ||
360 | } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
361 | tmp_inode->i_fop = &cifs_file_nobrl_ops; | |
1da177e4 LT |
362 | else |
363 | tmp_inode->i_fop = &cifs_file_ops; | |
f3f6ec4b | 364 | |
bfa0d75a SF |
365 | if((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
366 | (cifs_sb->tcon->ses->server->maxBuf < | |
273d81d6 DK |
367 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
368 | tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
369 | else | |
370 | tmp_inode->i_data.a_ops = &cifs_addr_ops; | |
966ca923 SF |
371 | |
372 | if(isNewInode) | |
373 | return; /* No sense invalidating pages for new inode since we | |
374 | have not started caching readahead file data yet */ | |
375 | ||
376 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
377 | (local_size == tmp_inode->i_size)) { | |
378 | cFYI(1, ("inode exists but unchanged")); | |
379 | } else { | |
380 | /* file may have changed on server */ | |
381 | cFYI(1, ("invalidate inode, readdir detected change")); | |
382 | invalidate_remote_inode(tmp_inode); | |
383 | } | |
1da177e4 LT |
384 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
385 | cFYI(1, ("Directory inode")); | |
386 | tmp_inode->i_op = &cifs_dir_inode_ops; | |
387 | tmp_inode->i_fop = &cifs_dir_ops; | |
388 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
389 | cFYI(1, ("Symbolic Link inode")); | |
390 | tmp_inode->i_op = &cifs_symlink_inode_ops; | |
391 | /* tmp_inode->i_fop = *//* do not need to set to anything */ | |
392 | } else { | |
393 | cFYI(1, ("Special inode")); | |
394 | init_special_inode(tmp_inode, tmp_inode->i_mode, | |
395 | tmp_inode->i_rdev); | |
396 | } | |
397 | } | |
398 | ||
399 | static int initiate_cifs_search(const int xid, struct file *file) | |
400 | { | |
401 | int rc = 0; | |
402 | char * full_path; | |
403 | struct cifsFileInfo * cifsFile; | |
404 | struct cifs_sb_info *cifs_sb; | |
405 | struct cifsTconInfo *pTcon; | |
406 | ||
407 | if(file->private_data == NULL) { | |
408 | file->private_data = | |
409 | kmalloc(sizeof(struct cifsFileInfo),GFP_KERNEL); | |
410 | } | |
411 | ||
412 | if(file->private_data == NULL) { | |
413 | return -ENOMEM; | |
414 | } else { | |
415 | memset(file->private_data,0,sizeof(struct cifsFileInfo)); | |
416 | } | |
417 | cifsFile = file->private_data; | |
418 | cifsFile->invalidHandle = TRUE; | |
419 | cifsFile->srch_inf.endOfSearch = FALSE; | |
420 | ||
421 | if(file->f_dentry == NULL) | |
422 | return -ENOENT; | |
423 | ||
424 | cifs_sb = CIFS_SB(file->f_dentry->d_sb); | |
425 | if(cifs_sb == NULL) | |
426 | return -EINVAL; | |
427 | ||
428 | pTcon = cifs_sb->tcon; | |
429 | if(pTcon == NULL) | |
430 | return -EINVAL; | |
431 | ||
7f57356b | 432 | full_path = build_path_from_dentry(file->f_dentry); |
1da177e4 LT |
433 | |
434 | if(full_path == NULL) { | |
435 | return -ENOMEM; | |
436 | } | |
437 | ||
966ca923 | 438 | cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos)); |
1da177e4 | 439 | |
75cf6bdc | 440 | ffirst_retry: |
1da177e4 LT |
441 | /* test for Unix extensions */ |
442 | if (pTcon->ses->capabilities & CAP_UNIX) { | |
5bafd765 SF |
443 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX; |
444 | } else if ((pTcon->ses->capabilities & | |
445 | (CAP_NT_SMBS | CAP_NT_FIND)) == 0) { | |
446 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD; | |
1da177e4 LT |
447 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
448 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; | |
449 | } else /* not srvinos - BB fixme add check for backlevel? */ { | |
450 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
451 | } | |
452 | ||
737b758c SF |
453 | rc = CIFSFindFirst(xid, pTcon,full_path,cifs_sb->local_nls, |
454 | &cifsFile->netfid, &cifsFile->srch_inf, | |
eafe8701 SF |
455 | cifs_sb->mnt_cifs_flags & |
456 | CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); | |
1da177e4 LT |
457 | if(rc == 0) |
458 | cifsFile->invalidHandle = FALSE; | |
75cf6bdc SF |
459 | if((rc == -EOPNOTSUPP) && |
460 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { | |
461 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; | |
462 | goto ffirst_retry; | |
463 | } | |
1da177e4 LT |
464 | kfree(full_path); |
465 | return rc; | |
466 | } | |
467 | ||
468 | /* return length of unicode string in bytes */ | |
469 | static int cifs_unicode_bytelen(char *str) | |
470 | { | |
471 | int len; | |
472 | __le16 * ustr = (__le16 *)str; | |
473 | ||
474 | for(len=0;len <= PATH_MAX;len++) { | |
475 | if(ustr[len] == 0) | |
476 | return len << 1; | |
477 | } | |
478 | cFYI(1,("Unicode string longer than PATH_MAX found")); | |
479 | return len << 1; | |
480 | } | |
481 | ||
5bafd765 | 482 | static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level) |
1da177e4 LT |
483 | { |
484 | char * new_entry; | |
485 | FILE_DIRECTORY_INFO * pDirInfo = (FILE_DIRECTORY_INFO *)old_entry; | |
486 | ||
5bafd765 SF |
487 | if(level == SMB_FIND_FILE_INFO_STANDARD) { |
488 | FIND_FILE_STANDARD_INFO * pfData; | |
489 | pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo; | |
490 | ||
491 | new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) + | |
492 | pfData->FileNameLength; | |
493 | } else | |
494 | new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset); | |
1da177e4 LT |
495 | cFYI(1,("new entry %p old entry %p",new_entry,old_entry)); |
496 | /* validate that new_entry is not past end of SMB */ | |
497 | if(new_entry >= end_of_smb) { | |
09d1db5c SF |
498 | cERROR(1, |
499 | ("search entry %p began after end of SMB %p old entry %p", | |
500 | new_entry, end_of_smb, old_entry)); | |
1da177e4 | 501 | return NULL; |
5bafd765 SF |
502 | } else if(((level == SMB_FIND_FILE_INFO_STANDARD) && |
503 | (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) || | |
504 | ((level != SMB_FIND_FILE_INFO_STANDARD) && | |
505 | (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) { | |
09d1db5c SF |
506 | cERROR(1,("search entry %p extends after end of SMB %p", |
507 | new_entry, end_of_smb)); | |
508 | return NULL; | |
509 | } else | |
1da177e4 LT |
510 | return new_entry; |
511 | ||
512 | } | |
513 | ||
514 | #define UNICODE_DOT cpu_to_le16(0x2e) | |
515 | ||
516 | /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */ | |
517 | static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile) | |
518 | { | |
519 | int rc = 0; | |
520 | char * filename = NULL; | |
521 | int len = 0; | |
522 | ||
5bafd765 | 523 | if(cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) { |
1da177e4 LT |
524 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; |
525 | filename = &pFindData->FileName[0]; | |
526 | if(cfile->srch_inf.unicode) { | |
527 | len = cifs_unicode_bytelen(filename); | |
528 | } else { | |
529 | /* BB should we make this strnlen of PATH_MAX? */ | |
530 | len = strnlen(filename, 5); | |
531 | } | |
5bafd765 | 532 | } else if(cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) { |
1da177e4 LT |
533 | FILE_DIRECTORY_INFO * pFindData = |
534 | (FILE_DIRECTORY_INFO *)current_entry; | |
535 | filename = &pFindData->FileName[0]; | |
536 | len = le32_to_cpu(pFindData->FileNameLength); | |
5bafd765 SF |
537 | } else if(cfile->srch_inf.info_level == |
538 | SMB_FIND_FILE_FULL_DIRECTORY_INFO) { | |
1da177e4 LT |
539 | FILE_FULL_DIRECTORY_INFO * pFindData = |
540 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
541 | filename = &pFindData->FileName[0]; | |
542 | len = le32_to_cpu(pFindData->FileNameLength); | |
5bafd765 SF |
543 | } else if(cfile->srch_inf.info_level == |
544 | SMB_FIND_FILE_ID_FULL_DIR_INFO) { | |
1da177e4 LT |
545 | SEARCH_ID_FULL_DIR_INFO * pFindData = |
546 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
547 | filename = &pFindData->FileName[0]; | |
548 | len = le32_to_cpu(pFindData->FileNameLength); | |
5bafd765 SF |
549 | } else if(cfile->srch_inf.info_level == |
550 | SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { | |
1da177e4 LT |
551 | FILE_BOTH_DIRECTORY_INFO * pFindData = |
552 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
553 | filename = &pFindData->FileName[0]; | |
554 | len = le32_to_cpu(pFindData->FileNameLength); | |
5bafd765 SF |
555 | } else if(cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) { |
556 | FIND_FILE_STANDARD_INFO * pFindData = | |
557 | (FIND_FILE_STANDARD_INFO *)current_entry; | |
558 | filename = &pFindData->FileName[0]; | |
5ddaa683 | 559 | len = pFindData->FileNameLength; |
1da177e4 LT |
560 | } else { |
561 | cFYI(1,("Unknown findfirst level %d",cfile->srch_inf.info_level)); | |
562 | } | |
563 | ||
564 | if(filename) { | |
565 | if(cfile->srch_inf.unicode) { | |
566 | __le16 *ufilename = (__le16 *)filename; | |
567 | if(len == 2) { | |
568 | /* check for . */ | |
569 | if(ufilename[0] == UNICODE_DOT) | |
570 | rc = 1; | |
571 | } else if(len == 4) { | |
572 | /* check for .. */ | |
573 | if((ufilename[0] == UNICODE_DOT) | |
574 | &&(ufilename[1] == UNICODE_DOT)) | |
575 | rc = 2; | |
576 | } | |
577 | } else /* ASCII */ { | |
578 | if(len == 1) { | |
579 | if(filename[0] == '.') | |
580 | rc = 1; | |
581 | } else if(len == 2) { | |
582 | if((filename[0] == '.') && (filename[1] == '.')) | |
583 | rc = 2; | |
584 | } | |
585 | } | |
586 | } | |
587 | ||
588 | return rc; | |
589 | } | |
590 | ||
eafe8701 SF |
591 | /* Check if directory that we are searching has changed so we can decide |
592 | whether we can use the cached search results from the previous search */ | |
593 | static int is_dir_changed(struct file * file) | |
594 | { | |
595 | struct inode * inode; | |
596 | struct cifsInodeInfo *cifsInfo; | |
597 | ||
598 | if(file->f_dentry == NULL) | |
599 | return 0; | |
600 | ||
601 | inode = file->f_dentry->d_inode; | |
602 | ||
603 | if(inode == NULL) | |
604 | return 0; | |
605 | ||
606 | cifsInfo = CIFS_I(inode); | |
607 | ||
608 | if(cifsInfo->time == 0) | |
609 | return 1; /* directory was changed, perhaps due to unlink */ | |
610 | else | |
611 | return 0; | |
612 | ||
613 | } | |
614 | ||
1da177e4 LT |
615 | /* find the corresponding entry in the search */ |
616 | /* Note that the SMB server returns search entries for . and .. which | |
617 | complicates logic here if we choose to parse for them and we do not | |
618 | assume that they are located in the findfirst return buffer.*/ | |
619 | /* We start counting in the buffer with entry 2 and increment for every | |
620 | entry (do not increment for . or .. entry) */ | |
621 | static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon, | |
622 | struct file *file, char **ppCurrentEntry, int *num_to_ret) | |
623 | { | |
624 | int rc = 0; | |
625 | int pos_in_buf = 0; | |
626 | loff_t first_entry_in_buffer; | |
627 | loff_t index_to_find = file->f_pos; | |
628 | struct cifsFileInfo * cifsFile = file->private_data; | |
629 | /* check if index in the buffer */ | |
630 | ||
eafe8701 SF |
631 | if((cifsFile == NULL) || (ppCurrentEntry == NULL) || |
632 | (num_to_ret == NULL)) | |
1da177e4 LT |
633 | return -ENOENT; |
634 | ||
635 | *ppCurrentEntry = NULL; | |
636 | first_entry_in_buffer = | |
637 | cifsFile->srch_inf.index_of_last_entry - | |
638 | cifsFile->srch_inf.entries_in_buffer; | |
60808233 SF |
639 | |
640 | /* if first entry in buf is zero then is first buffer | |
641 | in search response data which means it is likely . and .. | |
642 | will be in this buffer, although some servers do not return | |
643 | . and .. for the root of a drive and for those we need | |
644 | to start two entries earlier */ | |
645 | ||
3979877e SF |
646 | #ifdef CONFIG_CIFS_DEBUG2 |
647 | dump_cifs_file_struct(file, "In fce "); | |
648 | #endif | |
eafe8701 SF |
649 | if(((index_to_find < cifsFile->srch_inf.index_of_last_entry) && |
650 | is_dir_changed(file)) || | |
651 | (index_to_find < first_entry_in_buffer)) { | |
1da177e4 LT |
652 | /* close and restart search */ |
653 | cFYI(1,("search backing up - close and restart search")); | |
654 | cifsFile->invalidHandle = TRUE; | |
655 | CIFSFindClose(xid, pTcon, cifsFile->netfid); | |
656 | kfree(cifsFile->search_resume_name); | |
657 | cifsFile->search_resume_name = NULL; | |
658 | if(cifsFile->srch_inf.ntwrk_buf_start) { | |
659 | cFYI(1,("freeing SMB ff cache buf on search rewind")); | |
d47d7c1a SF |
660 | if(cifsFile->srch_inf.smallBuf) |
661 | cifs_small_buf_release(cifsFile->srch_inf. | |
662 | ntwrk_buf_start); | |
663 | else | |
664 | cifs_buf_release(cifsFile->srch_inf. | |
665 | ntwrk_buf_start); | |
1da177e4 LT |
666 | } |
667 | rc = initiate_cifs_search(xid,file); | |
668 | if(rc) { | |
669 | cFYI(1,("error %d reinitiating a search on rewind",rc)); | |
670 | return rc; | |
671 | } | |
672 | } | |
673 | ||
674 | while((index_to_find >= cifsFile->srch_inf.index_of_last_entry) && | |
675 | (rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)){ | |
676 | cFYI(1,("calling findnext2")); | |
dfb7533b SF |
677 | rc = CIFSFindNext(xid,pTcon,cifsFile->netfid, |
678 | &cifsFile->srch_inf); | |
1da177e4 LT |
679 | if(rc) |
680 | return -ENOENT; | |
681 | } | |
682 | if(index_to_find < cifsFile->srch_inf.index_of_last_entry) { | |
683 | /* we found the buffer that contains the entry */ | |
684 | /* scan and find it */ | |
685 | int i; | |
686 | char * current_entry; | |
687 | char * end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + | |
688 | smbCalcSize((struct smb_hdr *) | |
689 | cifsFile->srch_inf.ntwrk_buf_start); | |
60808233 SF |
690 | |
691 | current_entry = cifsFile->srch_inf.srch_entries_start; | |
1da177e4 LT |
692 | first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry |
693 | - cifsFile->srch_inf.entries_in_buffer; | |
694 | pos_in_buf = index_to_find - first_entry_in_buffer; | |
5bafd765 SF |
695 | cFYI(1,("found entry - pos_in_buf %d",pos_in_buf)); |
696 | ||
1da177e4 | 697 | for(i=0;(i<(pos_in_buf)) && (current_entry != NULL);i++) { |
dfb7533b | 698 | /* go entry by entry figuring out which is first */ |
5bafd765 SF |
699 | current_entry = nxt_dir_entry(current_entry,end_of_smb, |
700 | cifsFile->srch_inf.info_level); | |
1da177e4 LT |
701 | } |
702 | if((current_entry == NULL) && (i < pos_in_buf)) { | |
703 | /* BB fixme - check if we should flag this error */ | |
704 | cERROR(1,("reached end of buf searching for pos in buf" | |
705 | " %d index to find %lld rc %d", | |
706 | pos_in_buf,index_to_find,rc)); | |
707 | } | |
708 | rc = 0; | |
709 | *ppCurrentEntry = current_entry; | |
710 | } else { | |
711 | cFYI(1,("index not in buffer - could not findnext into it")); | |
712 | return 0; | |
713 | } | |
714 | ||
715 | if(pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) { | |
eafe8701 | 716 | cFYI(1,("can not return entries pos_in_buf beyond last entry")); |
1da177e4 LT |
717 | *num_to_ret = 0; |
718 | } else | |
719 | *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf; | |
1da177e4 LT |
720 | |
721 | return rc; | |
722 | } | |
723 | ||
724 | /* inode num, inode type and filename returned */ | |
725 | static int cifs_get_name_from_search_buf(struct qstr *pqst, | |
726 | char *current_entry, __u16 level, unsigned int unicode, | |
5bafd765 | 727 | struct cifs_sb_info * cifs_sb, int max_len, ino_t *pinum) |
1da177e4 LT |
728 | { |
729 | int rc = 0; | |
730 | unsigned int len = 0; | |
731 | char * filename; | |
732 | struct nls_table * nlt = cifs_sb->local_nls; | |
733 | ||
734 | *pinum = 0; | |
735 | ||
736 | if(level == SMB_FIND_FILE_UNIX) { | |
737 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; | |
738 | ||
739 | filename = &pFindData->FileName[0]; | |
740 | if(unicode) { | |
741 | len = cifs_unicode_bytelen(filename); | |
742 | } else { | |
743 | /* BB should we make this strnlen of PATH_MAX? */ | |
744 | len = strnlen(filename, PATH_MAX); | |
745 | } | |
746 | ||
747 | /* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */ | |
748 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
749 | *pinum = pFindData->UniqueId; | |
750 | } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) { | |
751 | FILE_DIRECTORY_INFO * pFindData = | |
752 | (FILE_DIRECTORY_INFO *)current_entry; | |
753 | filename = &pFindData->FileName[0]; | |
754 | len = le32_to_cpu(pFindData->FileNameLength); | |
755 | } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { | |
756 | FILE_FULL_DIRECTORY_INFO * pFindData = | |
757 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
758 | filename = &pFindData->FileName[0]; | |
759 | len = le32_to_cpu(pFindData->FileNameLength); | |
760 | } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { | |
761 | SEARCH_ID_FULL_DIR_INFO * pFindData = | |
762 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
763 | filename = &pFindData->FileName[0]; | |
764 | len = le32_to_cpu(pFindData->FileNameLength); | |
765 | *pinum = pFindData->UniqueId; | |
766 | } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { | |
767 | FILE_BOTH_DIRECTORY_INFO * pFindData = | |
768 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
769 | filename = &pFindData->FileName[0]; | |
770 | len = le32_to_cpu(pFindData->FileNameLength); | |
5bafd765 SF |
771 | } else if(level == SMB_FIND_FILE_INFO_STANDARD) { |
772 | FIND_FILE_STANDARD_INFO * pFindData = | |
773 | (FIND_FILE_STANDARD_INFO *)current_entry; | |
774 | filename = &pFindData->FileName[0]; | |
775 | /* one byte length, no name conversion */ | |
776 | len = (unsigned int)pFindData->FileNameLength; | |
1da177e4 LT |
777 | } else { |
778 | cFYI(1,("Unknown findfirst level %d",level)); | |
779 | return -EINVAL; | |
780 | } | |
5bafd765 SF |
781 | |
782 | if(len > max_len) { | |
783 | cERROR(1,("bad search response length %d past smb end", len)); | |
784 | return -EINVAL; | |
785 | } | |
786 | ||
1da177e4 LT |
787 | if(unicode) { |
788 | /* BB fixme - test with long names */ | |
789 | /* Note converted filename can be longer than in unicode */ | |
6a0b4824 SF |
790 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) |
791 | pqst->len = cifs_convertUCSpath((char *)pqst->name, | |
792 | (__le16 *)filename, len/2, nlt); | |
793 | else | |
6a0b4824 | 794 | pqst->len = cifs_strfromUCS_le((char *)pqst->name, |
e89dc920 | 795 | (__le16 *)filename,len/2,nlt); |
1da177e4 LT |
796 | } else { |
797 | pqst->name = filename; | |
798 | pqst->len = len; | |
799 | } | |
800 | pqst->hash = full_name_hash(pqst->name,pqst->len); | |
801 | /* cFYI(1,("filldir on %s",pqst->name)); */ | |
802 | return rc; | |
803 | } | |
804 | ||
805 | static int cifs_filldir(char *pfindEntry, struct file *file, | |
5bafd765 | 806 | filldir_t filldir, void *direntry, char *scratch_buf, int max_len) |
1da177e4 LT |
807 | { |
808 | int rc = 0; | |
809 | struct qstr qstring; | |
810 | struct cifsFileInfo * pCifsF; | |
811 | unsigned obj_type; | |
812 | ino_t inum; | |
813 | struct cifs_sb_info * cifs_sb; | |
814 | struct inode *tmp_inode; | |
815 | struct dentry *tmp_dentry; | |
816 | ||
817 | /* get filename and len into qstring */ | |
818 | /* get dentry */ | |
819 | /* decide whether to create and populate ionde */ | |
820 | if((direntry == NULL) || (file == NULL)) | |
821 | return -EINVAL; | |
822 | ||
823 | pCifsF = file->private_data; | |
824 | ||
825 | if((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL)) | |
826 | return -ENOENT; | |
827 | ||
828 | if(file->f_dentry == NULL) | |
829 | return -ENOENT; | |
830 | ||
b66ac3ea | 831 | rc = cifs_entry_is_dot(pfindEntry,pCifsF); |
60808233 SF |
832 | /* skip . and .. since we added them first */ |
833 | if(rc != 0) | |
834 | return 0; | |
835 | ||
1da177e4 LT |
836 | cifs_sb = CIFS_SB(file->f_dentry->d_sb); |
837 | ||
838 | qstring.name = scratch_buf; | |
839 | rc = cifs_get_name_from_search_buf(&qstring,pfindEntry, | |
840 | pCifsF->srch_inf.info_level, | |
841 | pCifsF->srch_inf.unicode,cifs_sb, | |
5bafd765 | 842 | max_len, |
1da177e4 LT |
843 | &inum /* returned */); |
844 | ||
845 | if(rc) | |
846 | return rc; | |
847 | ||
848 | rc = construct_dentry(&qstring,file,&tmp_inode, &tmp_dentry); | |
849 | if((tmp_inode == NULL) || (tmp_dentry == NULL)) | |
850 | return -ENOMEM; | |
851 | ||
852 | if(rc) { | |
853 | /* inode created, we need to hash it with right inode number */ | |
854 | if(inum != 0) { | |
855 | /* BB fixme - hash the 2 32 quantities bits together if necessary BB */ | |
856 | tmp_inode->i_ino = inum; | |
857 | } | |
858 | insert_inode_hash(tmp_inode); | |
859 | } | |
860 | ||
966ca923 SF |
861 | /* we pass in rc below, indicating whether it is a new inode, |
862 | so we can figure out whether to invalidate the inode cached | |
863 | data if the file has changed */ | |
5bafd765 | 864 | if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) |
966ca923 | 865 | unix_fill_in_inode(tmp_inode, |
5bafd765 SF |
866 | (FILE_UNIX_INFO *)pfindEntry, |
867 | &obj_type, rc); | |
868 | else if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) | |
869 | fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */, | |
870 | pfindEntry, &obj_type, rc); | |
871 | else | |
872 | fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc); | |
873 | ||
1da177e4 | 874 | |
dfb7533b SF |
875 | rc = filldir(direntry,qstring.name,qstring.len,file->f_pos, |
876 | tmp_inode->i_ino,obj_type); | |
1da177e4 LT |
877 | if(rc) { |
878 | cFYI(1,("filldir rc = %d",rc)); | |
879 | } | |
880 | ||
881 | dput(tmp_dentry); | |
882 | return rc; | |
883 | } | |
884 | ||
885 | static int cifs_save_resume_key(const char *current_entry, | |
886 | struct cifsFileInfo *cifsFile) | |
887 | { | |
888 | int rc = 0; | |
889 | unsigned int len = 0; | |
890 | __u16 level; | |
891 | char * filename; | |
892 | ||
893 | if((cifsFile == NULL) || (current_entry == NULL)) | |
894 | return -EINVAL; | |
895 | ||
896 | level = cifsFile->srch_inf.info_level; | |
897 | ||
898 | if(level == SMB_FIND_FILE_UNIX) { | |
899 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; | |
900 | ||
901 | filename = &pFindData->FileName[0]; | |
902 | if(cifsFile->srch_inf.unicode) { | |
903 | len = cifs_unicode_bytelen(filename); | |
904 | } else { | |
905 | /* BB should we make this strnlen of PATH_MAX? */ | |
906 | len = strnlen(filename, PATH_MAX); | |
907 | } | |
908 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; | |
909 | } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) { | |
910 | FILE_DIRECTORY_INFO * pFindData = | |
911 | (FILE_DIRECTORY_INFO *)current_entry; | |
912 | filename = &pFindData->FileName[0]; | |
913 | len = le32_to_cpu(pFindData->FileNameLength); | |
914 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
915 | } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { | |
916 | FILE_FULL_DIRECTORY_INFO * pFindData = | |
917 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
918 | filename = &pFindData->FileName[0]; | |
919 | len = le32_to_cpu(pFindData->FileNameLength); | |
920 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
921 | } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { | |
922 | SEARCH_ID_FULL_DIR_INFO * pFindData = | |
923 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
924 | filename = &pFindData->FileName[0]; | |
925 | len = le32_to_cpu(pFindData->FileNameLength); | |
926 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
927 | } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { | |
928 | FILE_BOTH_DIRECTORY_INFO * pFindData = | |
929 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
930 | filename = &pFindData->FileName[0]; | |
931 | len = le32_to_cpu(pFindData->FileNameLength); | |
932 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
5bafd765 SF |
933 | } else if(level == SMB_FIND_FILE_INFO_STANDARD) { |
934 | FIND_FILE_STANDARD_INFO * pFindData = | |
935 | (FIND_FILE_STANDARD_INFO *)current_entry; | |
936 | filename = &pFindData->FileName[0]; | |
937 | /* one byte length, no name conversion */ | |
938 | len = (unsigned int)pFindData->FileNameLength; | |
1da177e4 LT |
939 | } else { |
940 | cFYI(1,("Unknown findfirst level %d",level)); | |
941 | return -EINVAL; | |
942 | } | |
943 | cifsFile->srch_inf.resume_name_len = len; | |
944 | cifsFile->srch_inf.presume_name = filename; | |
945 | return rc; | |
946 | } | |
947 | ||
948 | int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) | |
949 | { | |
950 | int rc = 0; | |
951 | int xid,i; | |
952 | struct cifs_sb_info *cifs_sb; | |
953 | struct cifsTconInfo *pTcon; | |
954 | struct cifsFileInfo *cifsFile = NULL; | |
955 | char * current_entry; | |
956 | int num_to_fill = 0; | |
957 | char * tmp_buf = NULL; | |
958 | char * end_of_smb; | |
5bafd765 | 959 | int max_len; |
1da177e4 LT |
960 | |
961 | xid = GetXid(); | |
962 | ||
963 | if(file->f_dentry == NULL) { | |
964 | FreeXid(xid); | |
965 | return -EIO; | |
966 | } | |
1da177e4 LT |
967 | |
968 | cifs_sb = CIFS_SB(file->f_dentry->d_sb); | |
969 | pTcon = cifs_sb->tcon; | |
970 | if(pTcon == NULL) | |
971 | return -EINVAL; | |
972 | ||
1da177e4 LT |
973 | switch ((int) file->f_pos) { |
974 | case 0: | |
60808233 | 975 | if (filldir(direntry, ".", 1, file->f_pos, |
1da177e4 | 976 | file->f_dentry->d_inode->i_ino, DT_DIR) < 0) { |
60808233 | 977 | cERROR(1, ("Filldir for current dir failed")); |
1da177e4 LT |
978 | rc = -ENOMEM; |
979 | break; | |
980 | } | |
60808233 | 981 | file->f_pos++; |
1da177e4 | 982 | case 1: |
60808233 | 983 | if (filldir(direntry, "..", 2, file->f_pos, |
1da177e4 | 984 | file->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) { |
26a21b98 | 985 | cERROR(1, ("Filldir for parent dir failed")); |
1da177e4 LT |
986 | rc = -ENOMEM; |
987 | break; | |
988 | } | |
60808233 SF |
989 | file->f_pos++; |
990 | default: | |
1da177e4 LT |
991 | /* 1) If search is active, |
992 | is in current search buffer? | |
993 | if it before then restart search | |
994 | if after then keep searching till find it */ | |
995 | ||
996 | if(file->private_data == NULL) { | |
997 | rc = initiate_cifs_search(xid,file); | |
998 | cFYI(1,("initiate cifs search rc %d",rc)); | |
999 | if(rc) { | |
1000 | FreeXid(xid); | |
1001 | return rc; | |
1002 | } | |
1003 | } | |
1da177e4 LT |
1004 | if(file->private_data == NULL) { |
1005 | rc = -EINVAL; | |
1006 | FreeXid(xid); | |
1007 | return rc; | |
1008 | } | |
1009 | cifsFile = file->private_data; | |
1010 | if (cifsFile->srch_inf.endOfSearch) { | |
1011 | if(cifsFile->srch_inf.emptyDir) { | |
1012 | cFYI(1, ("End of search, empty dir")); | |
1013 | rc = 0; | |
1014 | break; | |
1015 | } | |
1016 | } /* else { | |
1017 | cifsFile->invalidHandle = TRUE; | |
1018 | CIFSFindClose(xid, pTcon, cifsFile->netfid); | |
1019 | } | |
1020 | kfree(cifsFile->search_resume_name); | |
1021 | cifsFile->search_resume_name = NULL; */ | |
1022 | ||
1da177e4 LT |
1023 | rc = find_cifs_entry(xid,pTcon, file, |
1024 | ¤t_entry,&num_to_fill); | |
1025 | if(rc) { | |
1026 | cFYI(1,("fce error %d",rc)); | |
1027 | goto rddir2_exit; | |
1028 | } else if (current_entry != NULL) { | |
1029 | cFYI(1,("entry %lld found",file->f_pos)); | |
1030 | } else { | |
1031 | cFYI(1,("could not find entry")); | |
1032 | goto rddir2_exit; | |
1033 | } | |
1034 | cFYI(1,("loop through %d times filling dir for net buf %p", | |
5bafd765 SF |
1035 | num_to_fill,cifsFile->srch_inf.ntwrk_buf_start)); |
1036 | max_len = smbCalcSize((struct smb_hdr *) | |
1037 | cifsFile->srch_inf.ntwrk_buf_start); | |
1038 | end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len; | |
1039 | ||
6a0b4824 SF |
1040 | /* To be safe - for UCS to UTF-8 with strings loaded |
1041 | with the rare long characters alloc more to account for | |
1042 | such multibyte target UTF-8 characters. cifs_unicode.c, | |
1043 | which actually does the conversion, has the same limit */ | |
1044 | tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL); | |
1da177e4 LT |
1045 | for(i=0;(i<num_to_fill) && (rc == 0);i++) { |
1046 | if(current_entry == NULL) { | |
1047 | /* evaluate whether this case is an error */ | |
1048 | cERROR(1,("past end of SMB num to fill %d i %d", | |
1049 | num_to_fill, i)); | |
1050 | break; | |
1051 | } | |
60808233 SF |
1052 | /* if buggy server returns . and .. late do |
1053 | we want to check for that here? */ | |
5bafd765 SF |
1054 | rc = cifs_filldir(current_entry, file, |
1055 | filldir, direntry, tmp_buf, max_len); | |
1da177e4 | 1056 | file->f_pos++; |
3979877e SF |
1057 | if(file->f_pos == |
1058 | cifsFile->srch_inf.index_of_last_entry) { | |
1da177e4 | 1059 | cFYI(1,("last entry in buf at pos %lld %s", |
3979877e | 1060 | file->f_pos,tmp_buf)); |
1da177e4 LT |
1061 | cifs_save_resume_key(current_entry,cifsFile); |
1062 | break; | |
1063 | } else | |
5bafd765 SF |
1064 | current_entry = |
1065 | nxt_dir_entry(current_entry, end_of_smb, | |
1066 | cifsFile->srch_inf.info_level); | |
1da177e4 LT |
1067 | } |
1068 | kfree(tmp_buf); | |
1069 | break; | |
1070 | } /* end switch */ | |
1071 | ||
1072 | rddir2_exit: | |
1da177e4 LT |
1073 | FreeXid(xid); |
1074 | return rc; | |
1075 | } |