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; | |
1da177e4 LT |
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; | |
b835bebe | 101 | rc = 2; |
1da177e4 LT |
102 | } |
103 | ||
104 | tmp_dentry->d_time = jiffies; | |
105 | *pnew_dentry = tmp_dentry; | |
106 | return rc; | |
107 | } | |
108 | ||
5bafd765 SF |
109 | static void fill_in_inode(struct inode *tmp_inode, int new_buf_type, |
110 | char * buf, int *pobject_type, int isNewInode) | |
1da177e4 | 111 | { |
966ca923 SF |
112 | loff_t local_size; |
113 | struct timespec local_mtime; | |
114 | ||
1da177e4 LT |
115 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
116 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
5bafd765 SF |
117 | __u32 attr; |
118 | __u64 allocation_size; | |
119 | __u64 end_of_file; | |
1da177e4 | 120 | |
966ca923 SF |
121 | /* save mtime and size */ |
122 | local_mtime = tmp_inode->i_mtime; | |
123 | local_size = tmp_inode->i_size; | |
124 | ||
5bafd765 SF |
125 | if(new_buf_type) { |
126 | FILE_DIRECTORY_INFO *pfindData = (FILE_DIRECTORY_INFO *)buf; | |
127 | ||
128 | attr = le32_to_cpu(pfindData->ExtFileAttributes); | |
129 | allocation_size = le64_to_cpu(pfindData->AllocationSize); | |
130 | end_of_file = le64_to_cpu(pfindData->EndOfFile); | |
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 | } else { /* legacy, OS2 and DOS style */ | |
1bd5bbcb | 138 | /* struct timespec ts;*/ |
5bafd765 SF |
139 | FIND_FILE_STANDARD_INFO * pfindData = |
140 | (FIND_FILE_STANDARD_INFO *)buf; | |
141 | ||
268f3be1 | 142 | tmp_inode->i_mtime = cnvrtDosUnixTm( |
1bd5bbcb | 143 | le16_to_cpu(pfindData->LastWriteDate), |
268f3be1 SF |
144 | le16_to_cpu(pfindData->LastWriteTime)); |
145 | tmp_inode->i_atime = cnvrtDosUnixTm( | |
146 | le16_to_cpu(pfindData->LastAccessDate), | |
147 | le16_to_cpu(pfindData->LastAccessTime)); | |
148 | tmp_inode->i_ctime = cnvrtDosUnixTm( | |
149 | le16_to_cpu(pfindData->LastWriteDate), | |
150 | le16_to_cpu(pfindData->LastWriteTime)); | |
151 | ||
5bafd765 SF |
152 | attr = le16_to_cpu(pfindData->Attributes); |
153 | allocation_size = le32_to_cpu(pfindData->AllocationSize); | |
154 | end_of_file = le32_to_cpu(pfindData->DataSize); | |
5bafd765 SF |
155 | } |
156 | ||
1da177e4 | 157 | /* Linux can not store file creation time unfortunately so ignore it */ |
5bafd765 SF |
158 | |
159 | cifsInfo->cifsAttrs = attr; | |
160 | cifsInfo->time = jiffies; | |
161 | ||
1da177e4 LT |
162 | /* treat dos attribute of read-only as read-only mode bit e.g. 555? */ |
163 | /* 2767 perms - indicate mandatory locking */ | |
164 | /* BB fill in uid and gid here? with help from winbind? | |
165 | or retrieve from NTFS stream extended attribute */ | |
166 | if (atomic_read(&cifsInfo->inUse) == 0) { | |
167 | tmp_inode->i_uid = cifs_sb->mnt_uid; | |
168 | tmp_inode->i_gid = cifs_sb->mnt_gid; | |
169 | /* set default mode. will override for dirs below */ | |
170 | tmp_inode->i_mode = cifs_sb->mnt_file_mode; | |
3020a1f5 SF |
171 | } else { |
172 | /* mask off the type bits since it gets set | |
173 | below and we do not want to get two type | |
174 | bits set */ | |
175 | tmp_inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
176 | } |
177 | ||
1da177e4 LT |
178 | if (attr & ATTR_DIRECTORY) { |
179 | *pobject_type = DT_DIR; | |
180 | /* override default perms since we do not lock dirs */ | |
181 | if(atomic_read(&cifsInfo->inUse) == 0) { | |
182 | tmp_inode->i_mode = cifs_sb->mnt_dir_mode; | |
183 | } | |
184 | tmp_inode->i_mode |= S_IFDIR; | |
eda3c029 | 185 | } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && |
3020a1f5 SF |
186 | (attr & ATTR_SYSTEM)) { |
187 | if (end_of_file == 0) { | |
188 | *pobject_type = DT_FIFO; | |
189 | tmp_inode->i_mode |= S_IFIFO; | |
190 | } else { | |
191 | /* rather than get the type here, we mark the | |
192 | inode as needing revalidate and get the real type | |
193 | (blk vs chr vs. symlink) later ie in lookup */ | |
194 | *pobject_type = DT_REG; | |
195 | tmp_inode->i_mode |= S_IFREG; | |
196 | cifsInfo->time = 0; | |
197 | } | |
1da177e4 LT |
198 | /* we no longer mark these because we could not follow them */ |
199 | /* } else if (attr & ATTR_REPARSE) { | |
200 | *pobject_type = DT_LNK; | |
201 | tmp_inode->i_mode |= S_IFLNK; */ | |
202 | } else { | |
203 | *pobject_type = DT_REG; | |
204 | tmp_inode->i_mode |= S_IFREG; | |
205 | if (attr & ATTR_READONLY) | |
206 | tmp_inode->i_mode &= ~(S_IWUGO); | |
207 | } /* could add code here - to validate if device or weird share type? */ | |
208 | ||
209 | /* can not fill in nlink here as in qpathinfo version and Unx search */ | |
210 | if (atomic_read(&cifsInfo->inUse) == 0) { | |
211 | atomic_set(&cifsInfo->inUse, 1); | |
212 | } | |
213 | ||
214 | if (is_size_safe_to_change(cifsInfo)) { | |
215 | /* can not safely change the file size here if the | |
216 | client is writing to it due to potential races */ | |
217 | i_size_write(tmp_inode, end_of_file); | |
218 | ||
219 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
220 | /* for this calculation, even though the reported blocksize is larger */ | |
221 | tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9; | |
222 | } | |
223 | ||
224 | if (allocation_size < end_of_file) | |
225 | cFYI(1, ("May be sparse file, allocation less than file size")); | |
5515eff8 AM |
226 | cFYI(1, ("File Size %ld and blocks %llu and blocksize %ld", |
227 | (unsigned long)tmp_inode->i_size, | |
228 | (unsigned long long)tmp_inode->i_blocks, | |
229 | tmp_inode->i_blksize)); | |
1da177e4 | 230 | if (S_ISREG(tmp_inode->i_mode)) { |
966ca923 | 231 | cFYI(1, ("File inode")); |
1da177e4 | 232 | tmp_inode->i_op = &cifs_file_inode_ops; |
8b94bcb9 SF |
233 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
234 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
235 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; | |
236 | else | |
237 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
238 | ||
239 | } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
240 | tmp_inode->i_fop = &cifs_file_nobrl_ops; | |
1da177e4 LT |
241 | else |
242 | tmp_inode->i_fop = &cifs_file_ops; | |
f3f6ec4b | 243 | |
bfa0d75a SF |
244 | if((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
245 | (cifs_sb->tcon->ses->server->maxBuf < | |
273d81d6 DK |
246 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
247 | tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
248 | else | |
249 | tmp_inode->i_data.a_ops = &cifs_addr_ops; | |
250 | ||
966ca923 | 251 | if(isNewInode) |
dfb7533b SF |
252 | return; /* No sense invalidating pages for new inode |
253 | since have not started caching readahead file | |
254 | data yet */ | |
966ca923 SF |
255 | |
256 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
257 | (local_size == tmp_inode->i_size)) { | |
258 | cFYI(1, ("inode exists but unchanged")); | |
259 | } else { | |
260 | /* file may have changed on server */ | |
261 | cFYI(1, ("invalidate inode, readdir detected change")); | |
262 | invalidate_remote_inode(tmp_inode); | |
263 | } | |
1da177e4 | 264 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
966ca923 | 265 | cFYI(1, ("Directory inode")); |
1da177e4 LT |
266 | tmp_inode->i_op = &cifs_dir_inode_ops; |
267 | tmp_inode->i_fop = &cifs_dir_ops; | |
268 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
966ca923 | 269 | cFYI(1, ("Symbolic Link inode")); |
1da177e4 LT |
270 | tmp_inode->i_op = &cifs_symlink_inode_ops; |
271 | } else { | |
966ca923 | 272 | cFYI(1, ("Init special inode")); |
1da177e4 LT |
273 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
274 | tmp_inode->i_rdev); | |
275 | } | |
276 | } | |
277 | ||
278 | static void unix_fill_in_inode(struct inode *tmp_inode, | |
966ca923 | 279 | FILE_UNIX_INFO *pfindData, int *pobject_type, int isNewInode) |
1da177e4 | 280 | { |
966ca923 SF |
281 | loff_t local_size; |
282 | struct timespec local_mtime; | |
283 | ||
1da177e4 LT |
284 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
285 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
286 | ||
287 | __u32 type = le32_to_cpu(pfindData->Type); | |
288 | __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes); | |
289 | __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile); | |
290 | cifsInfo->time = jiffies; | |
291 | atomic_inc(&cifsInfo->inUse); | |
292 | ||
966ca923 SF |
293 | /* save mtime and size */ |
294 | local_mtime = tmp_inode->i_mtime; | |
295 | local_size = tmp_inode->i_size; | |
296 | ||
1da177e4 LT |
297 | tmp_inode->i_atime = |
298 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); | |
299 | tmp_inode->i_mtime = | |
300 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime)); | |
301 | tmp_inode->i_ctime = | |
302 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange)); | |
303 | ||
304 | tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions); | |
3020a1f5 SF |
305 | /* since we set the inode type below we need to mask off type |
306 | to avoid strange results if bits above were corrupt */ | |
307 | tmp_inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
308 | if (type == UNIX_FILE) { |
309 | *pobject_type = DT_REG; | |
310 | tmp_inode->i_mode |= S_IFREG; | |
311 | } else if (type == UNIX_SYMLINK) { | |
312 | *pobject_type = DT_LNK; | |
313 | tmp_inode->i_mode |= S_IFLNK; | |
314 | } else if (type == UNIX_DIR) { | |
315 | *pobject_type = DT_DIR; | |
316 | tmp_inode->i_mode |= S_IFDIR; | |
317 | } else if (type == UNIX_CHARDEV) { | |
318 | *pobject_type = DT_CHR; | |
319 | tmp_inode->i_mode |= S_IFCHR; | |
320 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
321 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
322 | } else if (type == UNIX_BLOCKDEV) { | |
323 | *pobject_type = DT_BLK; | |
324 | tmp_inode->i_mode |= S_IFBLK; | |
325 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
326 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
327 | } else if (type == UNIX_FIFO) { | |
328 | *pobject_type = DT_FIFO; | |
329 | tmp_inode->i_mode |= S_IFIFO; | |
330 | } else if (type == UNIX_SOCKET) { | |
331 | *pobject_type = DT_SOCK; | |
332 | tmp_inode->i_mode |= S_IFSOCK; | |
3020a1f5 SF |
333 | } else { |
334 | /* safest to just call it a file */ | |
335 | *pobject_type = DT_REG; | |
336 | tmp_inode->i_mode |= S_IFREG; | |
337 | cFYI(1,("unknown inode type %d",type)); | |
1da177e4 LT |
338 | } |
339 | ||
340 | tmp_inode->i_uid = le64_to_cpu(pfindData->Uid); | |
341 | tmp_inode->i_gid = le64_to_cpu(pfindData->Gid); | |
342 | tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks); | |
343 | ||
344 | if (is_size_safe_to_change(cifsInfo)) { | |
345 | /* can not safely change the file size here if the | |
346 | client is writing to it due to potential races */ | |
347 | i_size_write(tmp_inode,end_of_file); | |
348 | ||
349 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
350 | /* for this calculation, not the real blocksize */ | |
351 | tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; | |
352 | } | |
353 | ||
354 | if (S_ISREG(tmp_inode->i_mode)) { | |
355 | cFYI(1, ("File inode")); | |
356 | tmp_inode->i_op = &cifs_file_inode_ops; | |
f3f6ec4b SF |
357 | |
358 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { | |
359 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
360 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; | |
361 | else | |
362 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
363 | ||
364 | } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
365 | tmp_inode->i_fop = &cifs_file_nobrl_ops; | |
1da177e4 LT |
366 | else |
367 | tmp_inode->i_fop = &cifs_file_ops; | |
f3f6ec4b | 368 | |
bfa0d75a SF |
369 | if((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
370 | (cifs_sb->tcon->ses->server->maxBuf < | |
273d81d6 DK |
371 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
372 | tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
373 | else | |
374 | tmp_inode->i_data.a_ops = &cifs_addr_ops; | |
966ca923 SF |
375 | |
376 | if(isNewInode) | |
377 | return; /* No sense invalidating pages for new inode since we | |
378 | have not started caching readahead file data yet */ | |
379 | ||
380 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
381 | (local_size == tmp_inode->i_size)) { | |
382 | cFYI(1, ("inode exists but unchanged")); | |
383 | } else { | |
384 | /* file may have changed on server */ | |
385 | cFYI(1, ("invalidate inode, readdir detected change")); | |
386 | invalidate_remote_inode(tmp_inode); | |
387 | } | |
1da177e4 LT |
388 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
389 | cFYI(1, ("Directory inode")); | |
390 | tmp_inode->i_op = &cifs_dir_inode_ops; | |
391 | tmp_inode->i_fop = &cifs_dir_ops; | |
392 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
393 | cFYI(1, ("Symbolic Link inode")); | |
394 | tmp_inode->i_op = &cifs_symlink_inode_ops; | |
395 | /* tmp_inode->i_fop = *//* do not need to set to anything */ | |
396 | } else { | |
397 | cFYI(1, ("Special inode")); | |
398 | init_special_inode(tmp_inode, tmp_inode->i_mode, | |
399 | tmp_inode->i_rdev); | |
400 | } | |
401 | } | |
402 | ||
403 | static int initiate_cifs_search(const int xid, struct file *file) | |
404 | { | |
405 | int rc = 0; | |
406 | char * full_path; | |
407 | struct cifsFileInfo * cifsFile; | |
408 | struct cifs_sb_info *cifs_sb; | |
409 | struct cifsTconInfo *pTcon; | |
410 | ||
411 | if(file->private_data == NULL) { | |
412 | file->private_data = | |
413 | kmalloc(sizeof(struct cifsFileInfo),GFP_KERNEL); | |
414 | } | |
415 | ||
416 | if(file->private_data == NULL) { | |
417 | return -ENOMEM; | |
418 | } else { | |
419 | memset(file->private_data,0,sizeof(struct cifsFileInfo)); | |
420 | } | |
421 | cifsFile = file->private_data; | |
422 | cifsFile->invalidHandle = TRUE; | |
423 | cifsFile->srch_inf.endOfSearch = FALSE; | |
424 | ||
425 | if(file->f_dentry == NULL) | |
426 | return -ENOENT; | |
427 | ||
428 | cifs_sb = CIFS_SB(file->f_dentry->d_sb); | |
429 | if(cifs_sb == NULL) | |
430 | return -EINVAL; | |
431 | ||
432 | pTcon = cifs_sb->tcon; | |
433 | if(pTcon == NULL) | |
434 | return -EINVAL; | |
435 | ||
7f57356b | 436 | full_path = build_path_from_dentry(file->f_dentry); |
1da177e4 LT |
437 | |
438 | if(full_path == NULL) { | |
439 | return -ENOMEM; | |
440 | } | |
441 | ||
966ca923 | 442 | cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos)); |
1da177e4 | 443 | |
75cf6bdc | 444 | ffirst_retry: |
1da177e4 LT |
445 | /* test for Unix extensions */ |
446 | if (pTcon->ses->capabilities & CAP_UNIX) { | |
5bafd765 SF |
447 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX; |
448 | } else if ((pTcon->ses->capabilities & | |
449 | (CAP_NT_SMBS | CAP_NT_FIND)) == 0) { | |
450 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD; | |
1da177e4 LT |
451 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
452 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; | |
453 | } else /* not srvinos - BB fixme add check for backlevel? */ { | |
454 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
455 | } | |
456 | ||
737b758c SF |
457 | rc = CIFSFindFirst(xid, pTcon,full_path,cifs_sb->local_nls, |
458 | &cifsFile->netfid, &cifsFile->srch_inf, | |
eafe8701 SF |
459 | cifs_sb->mnt_cifs_flags & |
460 | CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); | |
1da177e4 LT |
461 | if(rc == 0) |
462 | cifsFile->invalidHandle = FALSE; | |
75cf6bdc SF |
463 | if((rc == -EOPNOTSUPP) && |
464 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { | |
465 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; | |
466 | goto ffirst_retry; | |
467 | } | |
1da177e4 LT |
468 | kfree(full_path); |
469 | return rc; | |
470 | } | |
471 | ||
472 | /* return length of unicode string in bytes */ | |
473 | static int cifs_unicode_bytelen(char *str) | |
474 | { | |
475 | int len; | |
476 | __le16 * ustr = (__le16 *)str; | |
477 | ||
478 | for(len=0;len <= PATH_MAX;len++) { | |
479 | if(ustr[len] == 0) | |
480 | return len << 1; | |
481 | } | |
482 | cFYI(1,("Unicode string longer than PATH_MAX found")); | |
483 | return len << 1; | |
484 | } | |
485 | ||
5bafd765 | 486 | static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level) |
1da177e4 LT |
487 | { |
488 | char * new_entry; | |
489 | FILE_DIRECTORY_INFO * pDirInfo = (FILE_DIRECTORY_INFO *)old_entry; | |
490 | ||
5bafd765 SF |
491 | if(level == SMB_FIND_FILE_INFO_STANDARD) { |
492 | FIND_FILE_STANDARD_INFO * pfData; | |
493 | pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo; | |
494 | ||
495 | new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) + | |
496 | pfData->FileNameLength; | |
497 | } else | |
498 | new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset); | |
1da177e4 LT |
499 | cFYI(1,("new entry %p old entry %p",new_entry,old_entry)); |
500 | /* validate that new_entry is not past end of SMB */ | |
501 | if(new_entry >= end_of_smb) { | |
09d1db5c SF |
502 | cERROR(1, |
503 | ("search entry %p began after end of SMB %p old entry %p", | |
504 | new_entry, end_of_smb, old_entry)); | |
1da177e4 | 505 | return NULL; |
5bafd765 SF |
506 | } else if(((level == SMB_FIND_FILE_INFO_STANDARD) && |
507 | (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) || | |
508 | ((level != SMB_FIND_FILE_INFO_STANDARD) && | |
509 | (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) { | |
09d1db5c SF |
510 | cERROR(1,("search entry %p extends after end of SMB %p", |
511 | new_entry, end_of_smb)); | |
512 | return NULL; | |
513 | } else | |
1da177e4 LT |
514 | return new_entry; |
515 | ||
516 | } | |
517 | ||
518 | #define UNICODE_DOT cpu_to_le16(0x2e) | |
519 | ||
520 | /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */ | |
521 | static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile) | |
522 | { | |
523 | int rc = 0; | |
524 | char * filename = NULL; | |
525 | int len = 0; | |
526 | ||
5bafd765 | 527 | if(cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) { |
1da177e4 LT |
528 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; |
529 | filename = &pFindData->FileName[0]; | |
530 | if(cfile->srch_inf.unicode) { | |
531 | len = cifs_unicode_bytelen(filename); | |
532 | } else { | |
533 | /* BB should we make this strnlen of PATH_MAX? */ | |
534 | len = strnlen(filename, 5); | |
535 | } | |
5bafd765 | 536 | } else if(cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) { |
1da177e4 LT |
537 | FILE_DIRECTORY_INFO * pFindData = |
538 | (FILE_DIRECTORY_INFO *)current_entry; | |
539 | filename = &pFindData->FileName[0]; | |
540 | len = le32_to_cpu(pFindData->FileNameLength); | |
5bafd765 SF |
541 | } else if(cfile->srch_inf.info_level == |
542 | SMB_FIND_FILE_FULL_DIRECTORY_INFO) { | |
1da177e4 LT |
543 | FILE_FULL_DIRECTORY_INFO * pFindData = |
544 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
545 | filename = &pFindData->FileName[0]; | |
546 | len = le32_to_cpu(pFindData->FileNameLength); | |
5bafd765 SF |
547 | } else if(cfile->srch_inf.info_level == |
548 | SMB_FIND_FILE_ID_FULL_DIR_INFO) { | |
1da177e4 LT |
549 | SEARCH_ID_FULL_DIR_INFO * pFindData = |
550 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
551 | filename = &pFindData->FileName[0]; | |
552 | len = le32_to_cpu(pFindData->FileNameLength); | |
5bafd765 SF |
553 | } else if(cfile->srch_inf.info_level == |
554 | SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { | |
1da177e4 LT |
555 | FILE_BOTH_DIRECTORY_INFO * pFindData = |
556 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
557 | filename = &pFindData->FileName[0]; | |
558 | len = le32_to_cpu(pFindData->FileNameLength); | |
5bafd765 SF |
559 | } else if(cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) { |
560 | FIND_FILE_STANDARD_INFO * pFindData = | |
561 | (FIND_FILE_STANDARD_INFO *)current_entry; | |
562 | filename = &pFindData->FileName[0]; | |
5ddaa683 | 563 | len = pFindData->FileNameLength; |
1da177e4 LT |
564 | } else { |
565 | cFYI(1,("Unknown findfirst level %d",cfile->srch_inf.info_level)); | |
566 | } | |
567 | ||
568 | if(filename) { | |
569 | if(cfile->srch_inf.unicode) { | |
570 | __le16 *ufilename = (__le16 *)filename; | |
571 | if(len == 2) { | |
572 | /* check for . */ | |
573 | if(ufilename[0] == UNICODE_DOT) | |
574 | rc = 1; | |
575 | } else if(len == 4) { | |
576 | /* check for .. */ | |
577 | if((ufilename[0] == UNICODE_DOT) | |
578 | &&(ufilename[1] == UNICODE_DOT)) | |
579 | rc = 2; | |
580 | } | |
581 | } else /* ASCII */ { | |
582 | if(len == 1) { | |
583 | if(filename[0] == '.') | |
584 | rc = 1; | |
585 | } else if(len == 2) { | |
586 | if((filename[0] == '.') && (filename[1] == '.')) | |
587 | rc = 2; | |
588 | } | |
589 | } | |
590 | } | |
591 | ||
592 | return rc; | |
593 | } | |
594 | ||
eafe8701 SF |
595 | /* Check if directory that we are searching has changed so we can decide |
596 | whether we can use the cached search results from the previous search */ | |
597 | static int is_dir_changed(struct file * file) | |
598 | { | |
599 | struct inode * inode; | |
600 | struct cifsInodeInfo *cifsInfo; | |
601 | ||
602 | if(file->f_dentry == NULL) | |
603 | return 0; | |
604 | ||
605 | inode = file->f_dentry->d_inode; | |
606 | ||
607 | if(inode == NULL) | |
608 | return 0; | |
609 | ||
610 | cifsInfo = CIFS_I(inode); | |
611 | ||
612 | if(cifsInfo->time == 0) | |
613 | return 1; /* directory was changed, perhaps due to unlink */ | |
614 | else | |
615 | return 0; | |
616 | ||
617 | } | |
618 | ||
1da177e4 LT |
619 | /* find the corresponding entry in the search */ |
620 | /* Note that the SMB server returns search entries for . and .. which | |
621 | complicates logic here if we choose to parse for them and we do not | |
622 | assume that they are located in the findfirst return buffer.*/ | |
623 | /* We start counting in the buffer with entry 2 and increment for every | |
624 | entry (do not increment for . or .. entry) */ | |
625 | static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon, | |
626 | struct file *file, char **ppCurrentEntry, int *num_to_ret) | |
627 | { | |
628 | int rc = 0; | |
629 | int pos_in_buf = 0; | |
630 | loff_t first_entry_in_buffer; | |
631 | loff_t index_to_find = file->f_pos; | |
632 | struct cifsFileInfo * cifsFile = file->private_data; | |
633 | /* check if index in the buffer */ | |
634 | ||
eafe8701 SF |
635 | if((cifsFile == NULL) || (ppCurrentEntry == NULL) || |
636 | (num_to_ret == NULL)) | |
1da177e4 LT |
637 | return -ENOENT; |
638 | ||
639 | *ppCurrentEntry = NULL; | |
640 | first_entry_in_buffer = | |
641 | cifsFile->srch_inf.index_of_last_entry - | |
642 | cifsFile->srch_inf.entries_in_buffer; | |
60808233 SF |
643 | |
644 | /* if first entry in buf is zero then is first buffer | |
645 | in search response data which means it is likely . and .. | |
646 | will be in this buffer, although some servers do not return | |
647 | . and .. for the root of a drive and for those we need | |
648 | to start two entries earlier */ | |
649 | ||
3979877e SF |
650 | #ifdef CONFIG_CIFS_DEBUG2 |
651 | dump_cifs_file_struct(file, "In fce "); | |
652 | #endif | |
eafe8701 SF |
653 | if(((index_to_find < cifsFile->srch_inf.index_of_last_entry) && |
654 | is_dir_changed(file)) || | |
655 | (index_to_find < first_entry_in_buffer)) { | |
1da177e4 LT |
656 | /* close and restart search */ |
657 | cFYI(1,("search backing up - close and restart search")); | |
658 | cifsFile->invalidHandle = TRUE; | |
659 | CIFSFindClose(xid, pTcon, cifsFile->netfid); | |
660 | kfree(cifsFile->search_resume_name); | |
661 | cifsFile->search_resume_name = NULL; | |
662 | if(cifsFile->srch_inf.ntwrk_buf_start) { | |
663 | cFYI(1,("freeing SMB ff cache buf on search rewind")); | |
d47d7c1a SF |
664 | if(cifsFile->srch_inf.smallBuf) |
665 | cifs_small_buf_release(cifsFile->srch_inf. | |
666 | ntwrk_buf_start); | |
667 | else | |
668 | cifs_buf_release(cifsFile->srch_inf. | |
669 | ntwrk_buf_start); | |
1da177e4 LT |
670 | } |
671 | rc = initiate_cifs_search(xid,file); | |
672 | if(rc) { | |
673 | cFYI(1,("error %d reinitiating a search on rewind",rc)); | |
674 | return rc; | |
675 | } | |
676 | } | |
677 | ||
678 | while((index_to_find >= cifsFile->srch_inf.index_of_last_entry) && | |
679 | (rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)){ | |
680 | cFYI(1,("calling findnext2")); | |
dfb7533b SF |
681 | rc = CIFSFindNext(xid,pTcon,cifsFile->netfid, |
682 | &cifsFile->srch_inf); | |
1da177e4 LT |
683 | if(rc) |
684 | return -ENOENT; | |
685 | } | |
686 | if(index_to_find < cifsFile->srch_inf.index_of_last_entry) { | |
687 | /* we found the buffer that contains the entry */ | |
688 | /* scan and find it */ | |
689 | int i; | |
690 | char * current_entry; | |
691 | char * end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + | |
692 | smbCalcSize((struct smb_hdr *) | |
693 | cifsFile->srch_inf.ntwrk_buf_start); | |
60808233 SF |
694 | |
695 | current_entry = cifsFile->srch_inf.srch_entries_start; | |
1da177e4 LT |
696 | first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry |
697 | - cifsFile->srch_inf.entries_in_buffer; | |
698 | pos_in_buf = index_to_find - first_entry_in_buffer; | |
5bafd765 SF |
699 | cFYI(1,("found entry - pos_in_buf %d",pos_in_buf)); |
700 | ||
1da177e4 | 701 | for(i=0;(i<(pos_in_buf)) && (current_entry != NULL);i++) { |
dfb7533b | 702 | /* go entry by entry figuring out which is first */ |
5bafd765 SF |
703 | current_entry = nxt_dir_entry(current_entry,end_of_smb, |
704 | cifsFile->srch_inf.info_level); | |
1da177e4 LT |
705 | } |
706 | if((current_entry == NULL) && (i < pos_in_buf)) { | |
707 | /* BB fixme - check if we should flag this error */ | |
708 | cERROR(1,("reached end of buf searching for pos in buf" | |
709 | " %d index to find %lld rc %d", | |
710 | pos_in_buf,index_to_find,rc)); | |
711 | } | |
712 | rc = 0; | |
713 | *ppCurrentEntry = current_entry; | |
714 | } else { | |
715 | cFYI(1,("index not in buffer - could not findnext into it")); | |
716 | return 0; | |
717 | } | |
718 | ||
719 | if(pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) { | |
eafe8701 | 720 | cFYI(1,("can not return entries pos_in_buf beyond last entry")); |
1da177e4 LT |
721 | *num_to_ret = 0; |
722 | } else | |
723 | *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf; | |
1da177e4 LT |
724 | |
725 | return rc; | |
726 | } | |
727 | ||
728 | /* inode num, inode type and filename returned */ | |
729 | static int cifs_get_name_from_search_buf(struct qstr *pqst, | |
730 | char *current_entry, __u16 level, unsigned int unicode, | |
5bafd765 | 731 | struct cifs_sb_info * cifs_sb, int max_len, ino_t *pinum) |
1da177e4 LT |
732 | { |
733 | int rc = 0; | |
734 | unsigned int len = 0; | |
735 | char * filename; | |
736 | struct nls_table * nlt = cifs_sb->local_nls; | |
737 | ||
738 | *pinum = 0; | |
739 | ||
740 | if(level == SMB_FIND_FILE_UNIX) { | |
741 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; | |
742 | ||
743 | filename = &pFindData->FileName[0]; | |
744 | if(unicode) { | |
745 | len = cifs_unicode_bytelen(filename); | |
746 | } else { | |
747 | /* BB should we make this strnlen of PATH_MAX? */ | |
748 | len = strnlen(filename, PATH_MAX); | |
749 | } | |
750 | ||
751 | /* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */ | |
752 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
753 | *pinum = pFindData->UniqueId; | |
754 | } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) { | |
755 | FILE_DIRECTORY_INFO * pFindData = | |
756 | (FILE_DIRECTORY_INFO *)current_entry; | |
757 | filename = &pFindData->FileName[0]; | |
758 | len = le32_to_cpu(pFindData->FileNameLength); | |
759 | } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { | |
760 | FILE_FULL_DIRECTORY_INFO * pFindData = | |
761 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
762 | filename = &pFindData->FileName[0]; | |
763 | len = le32_to_cpu(pFindData->FileNameLength); | |
764 | } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { | |
765 | SEARCH_ID_FULL_DIR_INFO * pFindData = | |
766 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
767 | filename = &pFindData->FileName[0]; | |
768 | len = le32_to_cpu(pFindData->FileNameLength); | |
769 | *pinum = pFindData->UniqueId; | |
770 | } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { | |
771 | FILE_BOTH_DIRECTORY_INFO * pFindData = | |
772 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
773 | filename = &pFindData->FileName[0]; | |
774 | len = le32_to_cpu(pFindData->FileNameLength); | |
5bafd765 SF |
775 | } else if(level == SMB_FIND_FILE_INFO_STANDARD) { |
776 | FIND_FILE_STANDARD_INFO * pFindData = | |
777 | (FIND_FILE_STANDARD_INFO *)current_entry; | |
778 | filename = &pFindData->FileName[0]; | |
779 | /* one byte length, no name conversion */ | |
780 | len = (unsigned int)pFindData->FileNameLength; | |
1da177e4 LT |
781 | } else { |
782 | cFYI(1,("Unknown findfirst level %d",level)); | |
783 | return -EINVAL; | |
784 | } | |
5bafd765 SF |
785 | |
786 | if(len > max_len) { | |
787 | cERROR(1,("bad search response length %d past smb end", len)); | |
788 | return -EINVAL; | |
789 | } | |
790 | ||
1da177e4 LT |
791 | if(unicode) { |
792 | /* BB fixme - test with long names */ | |
793 | /* Note converted filename can be longer than in unicode */ | |
6a0b4824 SF |
794 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) |
795 | pqst->len = cifs_convertUCSpath((char *)pqst->name, | |
796 | (__le16 *)filename, len/2, nlt); | |
797 | else | |
6a0b4824 | 798 | pqst->len = cifs_strfromUCS_le((char *)pqst->name, |
e89dc920 | 799 | (__le16 *)filename,len/2,nlt); |
1da177e4 LT |
800 | } else { |
801 | pqst->name = filename; | |
802 | pqst->len = len; | |
803 | } | |
804 | pqst->hash = full_name_hash(pqst->name,pqst->len); | |
805 | /* cFYI(1,("filldir on %s",pqst->name)); */ | |
806 | return rc; | |
807 | } | |
808 | ||
809 | static int cifs_filldir(char *pfindEntry, struct file *file, | |
5bafd765 | 810 | filldir_t filldir, void *direntry, char *scratch_buf, int max_len) |
1da177e4 LT |
811 | { |
812 | int rc = 0; | |
813 | struct qstr qstring; | |
814 | struct cifsFileInfo * pCifsF; | |
815 | unsigned obj_type; | |
816 | ino_t inum; | |
817 | struct cifs_sb_info * cifs_sb; | |
818 | struct inode *tmp_inode; | |
819 | struct dentry *tmp_dentry; | |
820 | ||
821 | /* get filename and len into qstring */ | |
822 | /* get dentry */ | |
823 | /* decide whether to create and populate ionde */ | |
824 | if((direntry == NULL) || (file == NULL)) | |
825 | return -EINVAL; | |
826 | ||
827 | pCifsF = file->private_data; | |
828 | ||
829 | if((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL)) | |
830 | return -ENOENT; | |
831 | ||
832 | if(file->f_dentry == NULL) | |
833 | return -ENOENT; | |
834 | ||
b66ac3ea | 835 | rc = cifs_entry_is_dot(pfindEntry,pCifsF); |
60808233 SF |
836 | /* skip . and .. since we added them first */ |
837 | if(rc != 0) | |
838 | return 0; | |
839 | ||
1da177e4 LT |
840 | cifs_sb = CIFS_SB(file->f_dentry->d_sb); |
841 | ||
842 | qstring.name = scratch_buf; | |
843 | rc = cifs_get_name_from_search_buf(&qstring,pfindEntry, | |
844 | pCifsF->srch_inf.info_level, | |
845 | pCifsF->srch_inf.unicode,cifs_sb, | |
5bafd765 | 846 | max_len, |
1da177e4 LT |
847 | &inum /* returned */); |
848 | ||
849 | if(rc) | |
850 | return rc; | |
851 | ||
852 | rc = construct_dentry(&qstring,file,&tmp_inode, &tmp_dentry); | |
853 | if((tmp_inode == NULL) || (tmp_dentry == NULL)) | |
854 | return -ENOMEM; | |
855 | ||
856 | if(rc) { | |
857 | /* inode created, we need to hash it with right inode number */ | |
858 | if(inum != 0) { | |
859 | /* BB fixme - hash the 2 32 quantities bits together if necessary BB */ | |
860 | tmp_inode->i_ino = inum; | |
861 | } | |
862 | insert_inode_hash(tmp_inode); | |
863 | } | |
864 | ||
966ca923 SF |
865 | /* we pass in rc below, indicating whether it is a new inode, |
866 | so we can figure out whether to invalidate the inode cached | |
867 | data if the file has changed */ | |
5bafd765 | 868 | if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) |
966ca923 | 869 | unix_fill_in_inode(tmp_inode, |
5bafd765 SF |
870 | (FILE_UNIX_INFO *)pfindEntry, |
871 | &obj_type, rc); | |
872 | else if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) | |
873 | fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */, | |
874 | pfindEntry, &obj_type, rc); | |
875 | else | |
876 | fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc); | |
b835bebe SF |
877 | |
878 | if(rc) /* new inode - needs to be tied to dentry */ { | |
879 | d_instantiate(tmp_dentry, tmp_inode); | |
880 | if(rc == 2) | |
881 | d_rehash(tmp_dentry); | |
882 | } | |
5bafd765 | 883 | |
1da177e4 | 884 | |
dfb7533b SF |
885 | rc = filldir(direntry,qstring.name,qstring.len,file->f_pos, |
886 | tmp_inode->i_ino,obj_type); | |
1da177e4 LT |
887 | if(rc) { |
888 | cFYI(1,("filldir rc = %d",rc)); | |
889 | } | |
890 | ||
891 | dput(tmp_dentry); | |
892 | return rc; | |
893 | } | |
894 | ||
895 | static int cifs_save_resume_key(const char *current_entry, | |
896 | struct cifsFileInfo *cifsFile) | |
897 | { | |
898 | int rc = 0; | |
899 | unsigned int len = 0; | |
900 | __u16 level; | |
901 | char * filename; | |
902 | ||
903 | if((cifsFile == NULL) || (current_entry == NULL)) | |
904 | return -EINVAL; | |
905 | ||
906 | level = cifsFile->srch_inf.info_level; | |
907 | ||
908 | if(level == SMB_FIND_FILE_UNIX) { | |
909 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; | |
910 | ||
911 | filename = &pFindData->FileName[0]; | |
912 | if(cifsFile->srch_inf.unicode) { | |
913 | len = cifs_unicode_bytelen(filename); | |
914 | } else { | |
915 | /* BB should we make this strnlen of PATH_MAX? */ | |
916 | len = strnlen(filename, PATH_MAX); | |
917 | } | |
918 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; | |
919 | } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) { | |
920 | FILE_DIRECTORY_INFO * pFindData = | |
921 | (FILE_DIRECTORY_INFO *)current_entry; | |
922 | filename = &pFindData->FileName[0]; | |
923 | len = le32_to_cpu(pFindData->FileNameLength); | |
924 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
925 | } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { | |
926 | FILE_FULL_DIRECTORY_INFO * pFindData = | |
927 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
928 | filename = &pFindData->FileName[0]; | |
929 | len = le32_to_cpu(pFindData->FileNameLength); | |
930 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
931 | } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { | |
932 | SEARCH_ID_FULL_DIR_INFO * pFindData = | |
933 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
934 | filename = &pFindData->FileName[0]; | |
935 | len = le32_to_cpu(pFindData->FileNameLength); | |
936 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
937 | } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { | |
938 | FILE_BOTH_DIRECTORY_INFO * pFindData = | |
939 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
940 | filename = &pFindData->FileName[0]; | |
941 | len = le32_to_cpu(pFindData->FileNameLength); | |
942 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
5bafd765 SF |
943 | } else if(level == SMB_FIND_FILE_INFO_STANDARD) { |
944 | FIND_FILE_STANDARD_INFO * pFindData = | |
945 | (FIND_FILE_STANDARD_INFO *)current_entry; | |
946 | filename = &pFindData->FileName[0]; | |
947 | /* one byte length, no name conversion */ | |
948 | len = (unsigned int)pFindData->FileNameLength; | |
203cf2fc | 949 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; |
1da177e4 LT |
950 | } else { |
951 | cFYI(1,("Unknown findfirst level %d",level)); | |
952 | return -EINVAL; | |
953 | } | |
954 | cifsFile->srch_inf.resume_name_len = len; | |
955 | cifsFile->srch_inf.presume_name = filename; | |
956 | return rc; | |
957 | } | |
958 | ||
959 | int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) | |
960 | { | |
961 | int rc = 0; | |
962 | int xid,i; | |
963 | struct cifs_sb_info *cifs_sb; | |
964 | struct cifsTconInfo *pTcon; | |
965 | struct cifsFileInfo *cifsFile = NULL; | |
966 | char * current_entry; | |
967 | int num_to_fill = 0; | |
968 | char * tmp_buf = NULL; | |
969 | char * end_of_smb; | |
5bafd765 | 970 | int max_len; |
1da177e4 LT |
971 | |
972 | xid = GetXid(); | |
973 | ||
974 | if(file->f_dentry == NULL) { | |
975 | FreeXid(xid); | |
976 | return -EIO; | |
977 | } | |
1da177e4 LT |
978 | |
979 | cifs_sb = CIFS_SB(file->f_dentry->d_sb); | |
980 | pTcon = cifs_sb->tcon; | |
981 | if(pTcon == NULL) | |
982 | return -EINVAL; | |
983 | ||
1da177e4 LT |
984 | switch ((int) file->f_pos) { |
985 | case 0: | |
60808233 | 986 | if (filldir(direntry, ".", 1, file->f_pos, |
1da177e4 | 987 | file->f_dentry->d_inode->i_ino, DT_DIR) < 0) { |
60808233 | 988 | cERROR(1, ("Filldir for current dir failed")); |
1da177e4 LT |
989 | rc = -ENOMEM; |
990 | break; | |
991 | } | |
60808233 | 992 | file->f_pos++; |
1da177e4 | 993 | case 1: |
60808233 | 994 | if (filldir(direntry, "..", 2, file->f_pos, |
1da177e4 | 995 | file->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) { |
26a21b98 | 996 | cERROR(1, ("Filldir for parent dir failed")); |
1da177e4 LT |
997 | rc = -ENOMEM; |
998 | break; | |
999 | } | |
60808233 SF |
1000 | file->f_pos++; |
1001 | default: | |
1da177e4 LT |
1002 | /* 1) If search is active, |
1003 | is in current search buffer? | |
1004 | if it before then restart search | |
1005 | if after then keep searching till find it */ | |
1006 | ||
1007 | if(file->private_data == NULL) { | |
1008 | rc = initiate_cifs_search(xid,file); | |
1009 | cFYI(1,("initiate cifs search rc %d",rc)); | |
1010 | if(rc) { | |
1011 | FreeXid(xid); | |
1012 | return rc; | |
1013 | } | |
1014 | } | |
1da177e4 LT |
1015 | if(file->private_data == NULL) { |
1016 | rc = -EINVAL; | |
1017 | FreeXid(xid); | |
1018 | return rc; | |
1019 | } | |
1020 | cifsFile = file->private_data; | |
1021 | if (cifsFile->srch_inf.endOfSearch) { | |
1022 | if(cifsFile->srch_inf.emptyDir) { | |
1023 | cFYI(1, ("End of search, empty dir")); | |
1024 | rc = 0; | |
1025 | break; | |
1026 | } | |
1027 | } /* else { | |
1028 | cifsFile->invalidHandle = TRUE; | |
1029 | CIFSFindClose(xid, pTcon, cifsFile->netfid); | |
1030 | } | |
1031 | kfree(cifsFile->search_resume_name); | |
1032 | cifsFile->search_resume_name = NULL; */ | |
1033 | ||
1da177e4 LT |
1034 | rc = find_cifs_entry(xid,pTcon, file, |
1035 | ¤t_entry,&num_to_fill); | |
1036 | if(rc) { | |
1037 | cFYI(1,("fce error %d",rc)); | |
1038 | goto rddir2_exit; | |
1039 | } else if (current_entry != NULL) { | |
1040 | cFYI(1,("entry %lld found",file->f_pos)); | |
1041 | } else { | |
1042 | cFYI(1,("could not find entry")); | |
1043 | goto rddir2_exit; | |
1044 | } | |
1045 | cFYI(1,("loop through %d times filling dir for net buf %p", | |
5bafd765 SF |
1046 | num_to_fill,cifsFile->srch_inf.ntwrk_buf_start)); |
1047 | max_len = smbCalcSize((struct smb_hdr *) | |
1048 | cifsFile->srch_inf.ntwrk_buf_start); | |
1049 | end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len; | |
1050 | ||
6a0b4824 SF |
1051 | /* To be safe - for UCS to UTF-8 with strings loaded |
1052 | with the rare long characters alloc more to account for | |
1053 | such multibyte target UTF-8 characters. cifs_unicode.c, | |
1054 | which actually does the conversion, has the same limit */ | |
1055 | tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL); | |
1da177e4 LT |
1056 | for(i=0;(i<num_to_fill) && (rc == 0);i++) { |
1057 | if(current_entry == NULL) { | |
1058 | /* evaluate whether this case is an error */ | |
1059 | cERROR(1,("past end of SMB num to fill %d i %d", | |
1060 | num_to_fill, i)); | |
1061 | break; | |
1062 | } | |
60808233 SF |
1063 | /* if buggy server returns . and .. late do |
1064 | we want to check for that here? */ | |
5bafd765 SF |
1065 | rc = cifs_filldir(current_entry, file, |
1066 | filldir, direntry, tmp_buf, max_len); | |
1da177e4 | 1067 | file->f_pos++; |
3979877e SF |
1068 | if(file->f_pos == |
1069 | cifsFile->srch_inf.index_of_last_entry) { | |
1da177e4 | 1070 | cFYI(1,("last entry in buf at pos %lld %s", |
3979877e | 1071 | file->f_pos,tmp_buf)); |
1da177e4 LT |
1072 | cifs_save_resume_key(current_entry,cifsFile); |
1073 | break; | |
1074 | } else | |
5bafd765 SF |
1075 | current_entry = |
1076 | nxt_dir_entry(current_entry, end_of_smb, | |
1077 | cifsFile->srch_inf.info_level); | |
1da177e4 LT |
1078 | } |
1079 | kfree(tmp_buf); | |
1080 | break; | |
1081 | } /* end switch */ | |
1082 | ||
1083 | rddir2_exit: | |
1da177e4 LT |
1084 | FreeXid(xid); |
1085 | return rc; | |
1086 | } |