Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * fs/cifs/readdir.c | |
3 | * | |
4 | * Directory search handling | |
5 | * | |
966ca923 | 6 | * Copyright (C) International Business Machines Corp., 2004, 2005 |
1da177e4 LT |
7 | * Author(s): Steve French (sfrench@us.ibm.com) |
8 | * | |
9 | * This library is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU Lesser General Public License as published | |
11 | * by the Free Software Foundation; either version 2.1 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
17 | * the GNU Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public License | |
20 | * along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | #include <linux/fs.h> | |
24 | #include <linux/stat.h> | |
25 | #include <linux/smp_lock.h> | |
26 | #include "cifspdu.h" | |
27 | #include "cifsglob.h" | |
28 | #include "cifsproto.h" | |
29 | #include "cifs_unicode.h" | |
30 | #include "cifs_debug.h" | |
31 | #include "cifs_fs_sb.h" | |
32 | #include "cifsfs.h" | |
33 | ||
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); | |
94 | tmp_dentry->d_op = &cifs_dentry_ops; | |
95 | if(*ptmp_inode == NULL) | |
96 | return rc; | |
97 | rc = 1; | |
98 | d_instantiate(tmp_dentry, *ptmp_inode); | |
99 | d_rehash(tmp_dentry); | |
100 | } | |
101 | ||
102 | tmp_dentry->d_time = jiffies; | |
103 | *pnew_dentry = tmp_dentry; | |
104 | return rc; | |
105 | } | |
106 | ||
107 | static void fill_in_inode(struct inode *tmp_inode, | |
966ca923 | 108 | FILE_DIRECTORY_INFO *pfindData, int *pobject_type, int isNewInode) |
1da177e4 | 109 | { |
966ca923 SF |
110 | loff_t local_size; |
111 | struct timespec local_mtime; | |
112 | ||
1da177e4 LT |
113 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
114 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
115 | __u32 attr = le32_to_cpu(pfindData->ExtFileAttributes); | |
116 | __u64 allocation_size = le64_to_cpu(pfindData->AllocationSize); | |
117 | __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile); | |
118 | ||
119 | cifsInfo->cifsAttrs = attr; | |
120 | cifsInfo->time = jiffies; | |
121 | ||
966ca923 SF |
122 | /* save mtime and size */ |
123 | local_mtime = tmp_inode->i_mtime; | |
124 | local_size = tmp_inode->i_size; | |
125 | ||
1da177e4 LT |
126 | /* Linux can not store file creation time unfortunately so ignore it */ |
127 | tmp_inode->i_atime = | |
128 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); | |
129 | tmp_inode->i_mtime = | |
130 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime)); | |
131 | tmp_inode->i_ctime = | |
132 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime)); | |
133 | /* treat dos attribute of read-only as read-only mode bit e.g. 555? */ | |
134 | /* 2767 perms - indicate mandatory locking */ | |
135 | /* BB fill in uid and gid here? with help from winbind? | |
136 | or retrieve from NTFS stream extended attribute */ | |
137 | if (atomic_read(&cifsInfo->inUse) == 0) { | |
138 | tmp_inode->i_uid = cifs_sb->mnt_uid; | |
139 | tmp_inode->i_gid = cifs_sb->mnt_gid; | |
140 | /* set default mode. will override for dirs below */ | |
141 | tmp_inode->i_mode = cifs_sb->mnt_file_mode; | |
142 | } | |
143 | ||
1da177e4 LT |
144 | if (attr & ATTR_DIRECTORY) { |
145 | *pobject_type = DT_DIR; | |
146 | /* override default perms since we do not lock dirs */ | |
147 | if(atomic_read(&cifsInfo->inUse) == 0) { | |
148 | tmp_inode->i_mode = cifs_sb->mnt_dir_mode; | |
149 | } | |
150 | tmp_inode->i_mode |= S_IFDIR; | |
151 | /* we no longer mark these because we could not follow them */ | |
152 | /* } else if (attr & ATTR_REPARSE) { | |
153 | *pobject_type = DT_LNK; | |
154 | tmp_inode->i_mode |= S_IFLNK; */ | |
155 | } else { | |
156 | *pobject_type = DT_REG; | |
157 | tmp_inode->i_mode |= S_IFREG; | |
158 | if (attr & ATTR_READONLY) | |
159 | tmp_inode->i_mode &= ~(S_IWUGO); | |
160 | } /* could add code here - to validate if device or weird share type? */ | |
161 | ||
162 | /* can not fill in nlink here as in qpathinfo version and Unx search */ | |
163 | if (atomic_read(&cifsInfo->inUse) == 0) { | |
164 | atomic_set(&cifsInfo->inUse, 1); | |
165 | } | |
166 | ||
167 | if (is_size_safe_to_change(cifsInfo)) { | |
168 | /* can not safely change the file size here if the | |
169 | client is writing to it due to potential races */ | |
170 | i_size_write(tmp_inode, end_of_file); | |
171 | ||
172 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
173 | /* for this calculation, even though the reported blocksize is larger */ | |
174 | tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9; | |
175 | } | |
176 | ||
177 | if (allocation_size < end_of_file) | |
178 | cFYI(1, ("May be sparse file, allocation less than file size")); | |
179 | cFYI(1, | |
180 | ("File Size %ld and blocks %ld and blocksize %ld", | |
181 | (unsigned long)tmp_inode->i_size, tmp_inode->i_blocks, | |
182 | tmp_inode->i_blksize)); | |
183 | if (S_ISREG(tmp_inode->i_mode)) { | |
966ca923 | 184 | cFYI(1, ("File inode")); |
1da177e4 LT |
185 | tmp_inode->i_op = &cifs_file_inode_ops; |
186 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) | |
187 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
188 | else | |
189 | tmp_inode->i_fop = &cifs_file_ops; | |
190 | tmp_inode->i_data.a_ops = &cifs_addr_ops; | |
966ca923 SF |
191 | |
192 | if(isNewInode) | |
dfb7533b SF |
193 | return; /* No sense invalidating pages for new inode |
194 | since have not started caching readahead file | |
195 | data yet */ | |
966ca923 SF |
196 | |
197 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
198 | (local_size == tmp_inode->i_size)) { | |
199 | cFYI(1, ("inode exists but unchanged")); | |
200 | } else { | |
201 | /* file may have changed on server */ | |
202 | cFYI(1, ("invalidate inode, readdir detected change")); | |
203 | invalidate_remote_inode(tmp_inode); | |
204 | } | |
1da177e4 | 205 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
966ca923 | 206 | cFYI(1, ("Directory inode")); |
1da177e4 LT |
207 | tmp_inode->i_op = &cifs_dir_inode_ops; |
208 | tmp_inode->i_fop = &cifs_dir_ops; | |
209 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
966ca923 | 210 | cFYI(1, ("Symbolic Link inode")); |
1da177e4 LT |
211 | tmp_inode->i_op = &cifs_symlink_inode_ops; |
212 | } else { | |
966ca923 | 213 | cFYI(1, ("Init special inode")); |
1da177e4 LT |
214 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
215 | tmp_inode->i_rdev); | |
216 | } | |
217 | } | |
218 | ||
219 | static void unix_fill_in_inode(struct inode *tmp_inode, | |
966ca923 | 220 | FILE_UNIX_INFO *pfindData, int *pobject_type, int isNewInode) |
1da177e4 | 221 | { |
966ca923 SF |
222 | loff_t local_size; |
223 | struct timespec local_mtime; | |
224 | ||
1da177e4 LT |
225 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
226 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
227 | ||
228 | __u32 type = le32_to_cpu(pfindData->Type); | |
229 | __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes); | |
230 | __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile); | |
231 | cifsInfo->time = jiffies; | |
232 | atomic_inc(&cifsInfo->inUse); | |
233 | ||
966ca923 SF |
234 | /* save mtime and size */ |
235 | local_mtime = tmp_inode->i_mtime; | |
236 | local_size = tmp_inode->i_size; | |
237 | ||
1da177e4 LT |
238 | tmp_inode->i_atime = |
239 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); | |
240 | tmp_inode->i_mtime = | |
241 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime)); | |
242 | tmp_inode->i_ctime = | |
243 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange)); | |
244 | ||
245 | tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions); | |
246 | if (type == UNIX_FILE) { | |
247 | *pobject_type = DT_REG; | |
248 | tmp_inode->i_mode |= S_IFREG; | |
249 | } else if (type == UNIX_SYMLINK) { | |
250 | *pobject_type = DT_LNK; | |
251 | tmp_inode->i_mode |= S_IFLNK; | |
252 | } else if (type == UNIX_DIR) { | |
253 | *pobject_type = DT_DIR; | |
254 | tmp_inode->i_mode |= S_IFDIR; | |
255 | } else if (type == UNIX_CHARDEV) { | |
256 | *pobject_type = DT_CHR; | |
257 | tmp_inode->i_mode |= S_IFCHR; | |
258 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
259 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
260 | } else if (type == UNIX_BLOCKDEV) { | |
261 | *pobject_type = DT_BLK; | |
262 | tmp_inode->i_mode |= S_IFBLK; | |
263 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
264 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
265 | } else if (type == UNIX_FIFO) { | |
266 | *pobject_type = DT_FIFO; | |
267 | tmp_inode->i_mode |= S_IFIFO; | |
268 | } else if (type == UNIX_SOCKET) { | |
269 | *pobject_type = DT_SOCK; | |
270 | tmp_inode->i_mode |= S_IFSOCK; | |
271 | } | |
272 | ||
273 | tmp_inode->i_uid = le64_to_cpu(pfindData->Uid); | |
274 | tmp_inode->i_gid = le64_to_cpu(pfindData->Gid); | |
275 | tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks); | |
276 | ||
277 | if (is_size_safe_to_change(cifsInfo)) { | |
278 | /* can not safely change the file size here if the | |
279 | client is writing to it due to potential races */ | |
280 | i_size_write(tmp_inode,end_of_file); | |
281 | ||
282 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
283 | /* for this calculation, not the real blocksize */ | |
284 | tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; | |
285 | } | |
286 | ||
287 | if (S_ISREG(tmp_inode->i_mode)) { | |
288 | cFYI(1, ("File inode")); | |
289 | tmp_inode->i_op = &cifs_file_inode_ops; | |
290 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) | |
291 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
292 | else | |
293 | tmp_inode->i_fop = &cifs_file_ops; | |
294 | tmp_inode->i_data.a_ops = &cifs_addr_ops; | |
966ca923 SF |
295 | |
296 | if(isNewInode) | |
297 | return; /* No sense invalidating pages for new inode since we | |
298 | have not started caching readahead file data yet */ | |
299 | ||
300 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
301 | (local_size == tmp_inode->i_size)) { | |
302 | cFYI(1, ("inode exists but unchanged")); | |
303 | } else { | |
304 | /* file may have changed on server */ | |
305 | cFYI(1, ("invalidate inode, readdir detected change")); | |
306 | invalidate_remote_inode(tmp_inode); | |
307 | } | |
1da177e4 LT |
308 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
309 | cFYI(1, ("Directory inode")); | |
310 | tmp_inode->i_op = &cifs_dir_inode_ops; | |
311 | tmp_inode->i_fop = &cifs_dir_ops; | |
312 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
313 | cFYI(1, ("Symbolic Link inode")); | |
314 | tmp_inode->i_op = &cifs_symlink_inode_ops; | |
315 | /* tmp_inode->i_fop = *//* do not need to set to anything */ | |
316 | } else { | |
317 | cFYI(1, ("Special inode")); | |
318 | init_special_inode(tmp_inode, tmp_inode->i_mode, | |
319 | tmp_inode->i_rdev); | |
320 | } | |
321 | } | |
322 | ||
323 | static int initiate_cifs_search(const int xid, struct file *file) | |
324 | { | |
325 | int rc = 0; | |
326 | char * full_path; | |
327 | struct cifsFileInfo * cifsFile; | |
328 | struct cifs_sb_info *cifs_sb; | |
329 | struct cifsTconInfo *pTcon; | |
330 | ||
331 | if(file->private_data == NULL) { | |
332 | file->private_data = | |
333 | kmalloc(sizeof(struct cifsFileInfo),GFP_KERNEL); | |
334 | } | |
335 | ||
336 | if(file->private_data == NULL) { | |
337 | return -ENOMEM; | |
338 | } else { | |
339 | memset(file->private_data,0,sizeof(struct cifsFileInfo)); | |
340 | } | |
341 | cifsFile = file->private_data; | |
342 | cifsFile->invalidHandle = TRUE; | |
343 | cifsFile->srch_inf.endOfSearch = FALSE; | |
344 | ||
345 | if(file->f_dentry == NULL) | |
346 | return -ENOENT; | |
347 | ||
348 | cifs_sb = CIFS_SB(file->f_dentry->d_sb); | |
349 | if(cifs_sb == NULL) | |
350 | return -EINVAL; | |
351 | ||
352 | pTcon = cifs_sb->tcon; | |
353 | if(pTcon == NULL) | |
354 | return -EINVAL; | |
355 | ||
356 | down(&file->f_dentry->d_sb->s_vfs_rename_sem); | |
ac67055e | 357 | full_path = build_path_from_dentry(file->f_dentry, cifs_sb); |
1da177e4 LT |
358 | up(&file->f_dentry->d_sb->s_vfs_rename_sem); |
359 | ||
360 | if(full_path == NULL) { | |
361 | return -ENOMEM; | |
362 | } | |
363 | ||
966ca923 | 364 | cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos)); |
1da177e4 | 365 | |
75cf6bdc | 366 | ffirst_retry: |
1da177e4 LT |
367 | /* test for Unix extensions */ |
368 | if (pTcon->ses->capabilities & CAP_UNIX) { | |
369 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX; | |
370 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { | |
371 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; | |
372 | } else /* not srvinos - BB fixme add check for backlevel? */ { | |
373 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
374 | } | |
375 | ||
737b758c SF |
376 | rc = CIFSFindFirst(xid, pTcon,full_path,cifs_sb->local_nls, |
377 | &cifsFile->netfid, &cifsFile->srch_inf, | |
ac67055e | 378 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); |
1da177e4 LT |
379 | if(rc == 0) |
380 | cifsFile->invalidHandle = FALSE; | |
75cf6bdc SF |
381 | if((rc == -EOPNOTSUPP) && |
382 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { | |
383 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; | |
384 | goto ffirst_retry; | |
385 | } | |
1da177e4 LT |
386 | kfree(full_path); |
387 | return rc; | |
388 | } | |
389 | ||
390 | /* return length of unicode string in bytes */ | |
391 | static int cifs_unicode_bytelen(char *str) | |
392 | { | |
393 | int len; | |
394 | __le16 * ustr = (__le16 *)str; | |
395 | ||
396 | for(len=0;len <= PATH_MAX;len++) { | |
397 | if(ustr[len] == 0) | |
398 | return len << 1; | |
399 | } | |
400 | cFYI(1,("Unicode string longer than PATH_MAX found")); | |
401 | return len << 1; | |
402 | } | |
403 | ||
404 | static char *nxt_dir_entry(char *old_entry, char *end_of_smb) | |
405 | { | |
406 | char * new_entry; | |
407 | FILE_DIRECTORY_INFO * pDirInfo = (FILE_DIRECTORY_INFO *)old_entry; | |
408 | ||
409 | new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset); | |
410 | cFYI(1,("new entry %p old entry %p",new_entry,old_entry)); | |
411 | /* validate that new_entry is not past end of SMB */ | |
412 | if(new_entry >= end_of_smb) { | |
09d1db5c SF |
413 | cERROR(1, |
414 | ("search entry %p began after end of SMB %p old entry %p", | |
415 | new_entry, end_of_smb, old_entry)); | |
1da177e4 | 416 | return NULL; |
09d1db5c SF |
417 | } else if (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb) { |
418 | cERROR(1,("search entry %p extends after end of SMB %p", | |
419 | new_entry, end_of_smb)); | |
420 | return NULL; | |
421 | } else | |
1da177e4 LT |
422 | return new_entry; |
423 | ||
424 | } | |
425 | ||
426 | #define UNICODE_DOT cpu_to_le16(0x2e) | |
427 | ||
428 | /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */ | |
429 | static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile) | |
430 | { | |
431 | int rc = 0; | |
432 | char * filename = NULL; | |
433 | int len = 0; | |
434 | ||
435 | if(cfile->srch_inf.info_level == 0x202) { | |
436 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; | |
437 | filename = &pFindData->FileName[0]; | |
438 | if(cfile->srch_inf.unicode) { | |
439 | len = cifs_unicode_bytelen(filename); | |
440 | } else { | |
441 | /* BB should we make this strnlen of PATH_MAX? */ | |
442 | len = strnlen(filename, 5); | |
443 | } | |
444 | } else if(cfile->srch_inf.info_level == 0x101) { | |
445 | FILE_DIRECTORY_INFO * pFindData = | |
446 | (FILE_DIRECTORY_INFO *)current_entry; | |
447 | filename = &pFindData->FileName[0]; | |
448 | len = le32_to_cpu(pFindData->FileNameLength); | |
449 | } else if(cfile->srch_inf.info_level == 0x102) { | |
450 | FILE_FULL_DIRECTORY_INFO * pFindData = | |
451 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
452 | filename = &pFindData->FileName[0]; | |
453 | len = le32_to_cpu(pFindData->FileNameLength); | |
454 | } else if(cfile->srch_inf.info_level == 0x105) { | |
455 | SEARCH_ID_FULL_DIR_INFO * pFindData = | |
456 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
457 | filename = &pFindData->FileName[0]; | |
458 | len = le32_to_cpu(pFindData->FileNameLength); | |
459 | } else if(cfile->srch_inf.info_level == 0x104) { | |
460 | FILE_BOTH_DIRECTORY_INFO * pFindData = | |
461 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
462 | filename = &pFindData->FileName[0]; | |
463 | len = le32_to_cpu(pFindData->FileNameLength); | |
464 | } else { | |
465 | cFYI(1,("Unknown findfirst level %d",cfile->srch_inf.info_level)); | |
466 | } | |
467 | ||
468 | if(filename) { | |
469 | if(cfile->srch_inf.unicode) { | |
470 | __le16 *ufilename = (__le16 *)filename; | |
471 | if(len == 2) { | |
472 | /* check for . */ | |
473 | if(ufilename[0] == UNICODE_DOT) | |
474 | rc = 1; | |
475 | } else if(len == 4) { | |
476 | /* check for .. */ | |
477 | if((ufilename[0] == UNICODE_DOT) | |
478 | &&(ufilename[1] == UNICODE_DOT)) | |
479 | rc = 2; | |
480 | } | |
481 | } else /* ASCII */ { | |
482 | if(len == 1) { | |
483 | if(filename[0] == '.') | |
484 | rc = 1; | |
485 | } else if(len == 2) { | |
486 | if((filename[0] == '.') && (filename[1] == '.')) | |
487 | rc = 2; | |
488 | } | |
489 | } | |
490 | } | |
491 | ||
492 | return rc; | |
493 | } | |
494 | ||
495 | /* find the corresponding entry in the search */ | |
496 | /* Note that the SMB server returns search entries for . and .. which | |
497 | complicates logic here if we choose to parse for them and we do not | |
498 | assume that they are located in the findfirst return buffer.*/ | |
499 | /* We start counting in the buffer with entry 2 and increment for every | |
500 | entry (do not increment for . or .. entry) */ | |
501 | static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon, | |
502 | struct file *file, char **ppCurrentEntry, int *num_to_ret) | |
503 | { | |
504 | int rc = 0; | |
505 | int pos_in_buf = 0; | |
506 | loff_t first_entry_in_buffer; | |
507 | loff_t index_to_find = file->f_pos; | |
508 | struct cifsFileInfo * cifsFile = file->private_data; | |
509 | /* check if index in the buffer */ | |
510 | ||
511 | if((cifsFile == NULL) || (ppCurrentEntry == NULL) || (num_to_ret == NULL)) | |
512 | return -ENOENT; | |
513 | ||
514 | *ppCurrentEntry = NULL; | |
515 | first_entry_in_buffer = | |
516 | cifsFile->srch_inf.index_of_last_entry - | |
517 | cifsFile->srch_inf.entries_in_buffer; | |
518 | /* dump_cifs_file_struct(file, "In fce ");*/ | |
519 | if(index_to_find < first_entry_in_buffer) { | |
520 | /* close and restart search */ | |
521 | cFYI(1,("search backing up - close and restart search")); | |
522 | cifsFile->invalidHandle = TRUE; | |
523 | CIFSFindClose(xid, pTcon, cifsFile->netfid); | |
524 | kfree(cifsFile->search_resume_name); | |
525 | cifsFile->search_resume_name = NULL; | |
526 | if(cifsFile->srch_inf.ntwrk_buf_start) { | |
527 | cFYI(1,("freeing SMB ff cache buf on search rewind")); | |
528 | cifs_buf_release(cifsFile->srch_inf.ntwrk_buf_start); | |
529 | } | |
530 | rc = initiate_cifs_search(xid,file); | |
531 | if(rc) { | |
532 | cFYI(1,("error %d reinitiating a search on rewind",rc)); | |
533 | return rc; | |
534 | } | |
535 | } | |
536 | ||
537 | while((index_to_find >= cifsFile->srch_inf.index_of_last_entry) && | |
538 | (rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)){ | |
539 | cFYI(1,("calling findnext2")); | |
dfb7533b SF |
540 | rc = CIFSFindNext(xid,pTcon,cifsFile->netfid, |
541 | &cifsFile->srch_inf); | |
1da177e4 LT |
542 | if(rc) |
543 | return -ENOENT; | |
544 | } | |
545 | if(index_to_find < cifsFile->srch_inf.index_of_last_entry) { | |
546 | /* we found the buffer that contains the entry */ | |
547 | /* scan and find it */ | |
548 | int i; | |
549 | char * current_entry; | |
550 | char * end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + | |
551 | smbCalcSize((struct smb_hdr *) | |
552 | cifsFile->srch_inf.ntwrk_buf_start); | |
553 | /* dump_cifs_file_struct(file,"found entry in fce "); */ | |
554 | first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry | |
555 | - cifsFile->srch_inf.entries_in_buffer; | |
556 | pos_in_buf = index_to_find - first_entry_in_buffer; | |
557 | cFYI(1,("found entry - pos_in_buf %d",pos_in_buf)); | |
558 | current_entry = cifsFile->srch_inf.srch_entries_start; | |
559 | for(i=0;(i<(pos_in_buf)) && (current_entry != NULL);i++) { | |
dfb7533b | 560 | /* go entry by entry figuring out which is first */ |
1da177e4 LT |
561 | /* if( . or ..) |
562 | skip */ | |
563 | rc = cifs_entry_is_dot(current_entry,cifsFile); | |
564 | if(rc == 1) /* is . or .. so skip */ { | |
565 | cFYI(1,("Entry is .")); /* BB removeme BB */ | |
566 | /* continue; */ | |
567 | } else if (rc == 2 ) { | |
568 | cFYI(1,("Entry is ..")); /* BB removeme BB */ | |
569 | /* continue; */ | |
570 | } | |
571 | current_entry = nxt_dir_entry(current_entry,end_of_smb); | |
572 | } | |
573 | if((current_entry == NULL) && (i < pos_in_buf)) { | |
574 | /* BB fixme - check if we should flag this error */ | |
575 | cERROR(1,("reached end of buf searching for pos in buf" | |
576 | " %d index to find %lld rc %d", | |
577 | pos_in_buf,index_to_find,rc)); | |
578 | } | |
579 | rc = 0; | |
580 | *ppCurrentEntry = current_entry; | |
581 | } else { | |
582 | cFYI(1,("index not in buffer - could not findnext into it")); | |
583 | return 0; | |
584 | } | |
585 | ||
586 | if(pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) { | |
587 | cFYI(1,("can not return entries when pos_in_buf beyond last entry")); | |
588 | *num_to_ret = 0; | |
589 | } else | |
590 | *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf; | |
591 | /* dump_cifs_file_struct(file, "end fce ");*/ | |
592 | ||
593 | return rc; | |
594 | } | |
595 | ||
596 | /* inode num, inode type and filename returned */ | |
597 | static int cifs_get_name_from_search_buf(struct qstr *pqst, | |
598 | char *current_entry, __u16 level, unsigned int unicode, | |
599 | struct cifs_sb_info * cifs_sb, ino_t *pinum) | |
600 | { | |
601 | int rc = 0; | |
602 | unsigned int len = 0; | |
603 | char * filename; | |
604 | struct nls_table * nlt = cifs_sb->local_nls; | |
605 | ||
606 | *pinum = 0; | |
607 | ||
608 | if(level == SMB_FIND_FILE_UNIX) { | |
609 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; | |
610 | ||
611 | filename = &pFindData->FileName[0]; | |
612 | if(unicode) { | |
613 | len = cifs_unicode_bytelen(filename); | |
614 | } else { | |
615 | /* BB should we make this strnlen of PATH_MAX? */ | |
616 | len = strnlen(filename, PATH_MAX); | |
617 | } | |
618 | ||
619 | /* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */ | |
620 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
621 | *pinum = pFindData->UniqueId; | |
622 | } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) { | |
623 | FILE_DIRECTORY_INFO * pFindData = | |
624 | (FILE_DIRECTORY_INFO *)current_entry; | |
625 | filename = &pFindData->FileName[0]; | |
626 | len = le32_to_cpu(pFindData->FileNameLength); | |
627 | } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { | |
628 | FILE_FULL_DIRECTORY_INFO * pFindData = | |
629 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
630 | filename = &pFindData->FileName[0]; | |
631 | len = le32_to_cpu(pFindData->FileNameLength); | |
632 | } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { | |
633 | SEARCH_ID_FULL_DIR_INFO * pFindData = | |
634 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
635 | filename = &pFindData->FileName[0]; | |
636 | len = le32_to_cpu(pFindData->FileNameLength); | |
637 | *pinum = pFindData->UniqueId; | |
638 | } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { | |
639 | FILE_BOTH_DIRECTORY_INFO * pFindData = | |
640 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
641 | filename = &pFindData->FileName[0]; | |
642 | len = le32_to_cpu(pFindData->FileNameLength); | |
643 | } else { | |
644 | cFYI(1,("Unknown findfirst level %d",level)); | |
645 | return -EINVAL; | |
646 | } | |
647 | if(unicode) { | |
648 | /* BB fixme - test with long names */ | |
649 | /* Note converted filename can be longer than in unicode */ | |
6a0b4824 SF |
650 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) |
651 | pqst->len = cifs_convertUCSpath((char *)pqst->name, | |
652 | (__le16 *)filename, len/2, nlt); | |
653 | else | |
6a0b4824 SF |
654 | pqst->len = cifs_strfromUCS_le((char *)pqst->name, |
655 | (wchar_t *)filename,len/2,nlt); | |
1da177e4 LT |
656 | } else { |
657 | pqst->name = filename; | |
658 | pqst->len = len; | |
659 | } | |
660 | pqst->hash = full_name_hash(pqst->name,pqst->len); | |
661 | /* cFYI(1,("filldir on %s",pqst->name)); */ | |
662 | return rc; | |
663 | } | |
664 | ||
665 | static int cifs_filldir(char *pfindEntry, struct file *file, | |
666 | filldir_t filldir, void *direntry, char *scratch_buf) | |
667 | { | |
668 | int rc = 0; | |
669 | struct qstr qstring; | |
670 | struct cifsFileInfo * pCifsF; | |
671 | unsigned obj_type; | |
672 | ino_t inum; | |
673 | struct cifs_sb_info * cifs_sb; | |
674 | struct inode *tmp_inode; | |
675 | struct dentry *tmp_dentry; | |
676 | ||
677 | /* get filename and len into qstring */ | |
678 | /* get dentry */ | |
679 | /* decide whether to create and populate ionde */ | |
680 | if((direntry == NULL) || (file == NULL)) | |
681 | return -EINVAL; | |
682 | ||
683 | pCifsF = file->private_data; | |
684 | ||
685 | if((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL)) | |
686 | return -ENOENT; | |
687 | ||
688 | if(file->f_dentry == NULL) | |
689 | return -ENOENT; | |
690 | ||
691 | cifs_sb = CIFS_SB(file->f_dentry->d_sb); | |
692 | ||
693 | qstring.name = scratch_buf; | |
694 | rc = cifs_get_name_from_search_buf(&qstring,pfindEntry, | |
695 | pCifsF->srch_inf.info_level, | |
696 | pCifsF->srch_inf.unicode,cifs_sb, | |
697 | &inum /* returned */); | |
698 | ||
699 | if(rc) | |
700 | return rc; | |
701 | ||
702 | rc = construct_dentry(&qstring,file,&tmp_inode, &tmp_dentry); | |
703 | if((tmp_inode == NULL) || (tmp_dentry == NULL)) | |
704 | return -ENOMEM; | |
705 | ||
706 | if(rc) { | |
707 | /* inode created, we need to hash it with right inode number */ | |
708 | if(inum != 0) { | |
709 | /* BB fixme - hash the 2 32 quantities bits together if necessary BB */ | |
710 | tmp_inode->i_ino = inum; | |
711 | } | |
712 | insert_inode_hash(tmp_inode); | |
713 | } | |
714 | ||
966ca923 SF |
715 | /* we pass in rc below, indicating whether it is a new inode, |
716 | so we can figure out whether to invalidate the inode cached | |
717 | data if the file has changed */ | |
1da177e4 | 718 | if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) { |
966ca923 SF |
719 | unix_fill_in_inode(tmp_inode, |
720 | (FILE_UNIX_INFO *)pfindEntry,&obj_type, rc); | |
1da177e4 | 721 | } else { |
966ca923 SF |
722 | fill_in_inode(tmp_inode, |
723 | (FILE_DIRECTORY_INFO *)pfindEntry,&obj_type, rc); | |
1da177e4 LT |
724 | } |
725 | ||
dfb7533b SF |
726 | rc = filldir(direntry,qstring.name,qstring.len,file->f_pos, |
727 | tmp_inode->i_ino,obj_type); | |
1da177e4 LT |
728 | if(rc) { |
729 | cFYI(1,("filldir rc = %d",rc)); | |
730 | } | |
731 | ||
732 | dput(tmp_dentry); | |
733 | return rc; | |
734 | } | |
735 | ||
736 | static int cifs_save_resume_key(const char *current_entry, | |
737 | struct cifsFileInfo *cifsFile) | |
738 | { | |
739 | int rc = 0; | |
740 | unsigned int len = 0; | |
741 | __u16 level; | |
742 | char * filename; | |
743 | ||
744 | if((cifsFile == NULL) || (current_entry == NULL)) | |
745 | return -EINVAL; | |
746 | ||
747 | level = cifsFile->srch_inf.info_level; | |
748 | ||
749 | if(level == SMB_FIND_FILE_UNIX) { | |
750 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; | |
751 | ||
752 | filename = &pFindData->FileName[0]; | |
753 | if(cifsFile->srch_inf.unicode) { | |
754 | len = cifs_unicode_bytelen(filename); | |
755 | } else { | |
756 | /* BB should we make this strnlen of PATH_MAX? */ | |
757 | len = strnlen(filename, PATH_MAX); | |
758 | } | |
759 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; | |
760 | } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) { | |
761 | FILE_DIRECTORY_INFO * pFindData = | |
762 | (FILE_DIRECTORY_INFO *)current_entry; | |
763 | filename = &pFindData->FileName[0]; | |
764 | len = le32_to_cpu(pFindData->FileNameLength); | |
765 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
766 | } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { | |
767 | FILE_FULL_DIRECTORY_INFO * pFindData = | |
768 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
769 | filename = &pFindData->FileName[0]; | |
770 | len = le32_to_cpu(pFindData->FileNameLength); | |
771 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
772 | } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { | |
773 | SEARCH_ID_FULL_DIR_INFO * pFindData = | |
774 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
775 | filename = &pFindData->FileName[0]; | |
776 | len = le32_to_cpu(pFindData->FileNameLength); | |
777 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
778 | } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { | |
779 | FILE_BOTH_DIRECTORY_INFO * pFindData = | |
780 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
781 | filename = &pFindData->FileName[0]; | |
782 | len = le32_to_cpu(pFindData->FileNameLength); | |
783 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
784 | } else { | |
785 | cFYI(1,("Unknown findfirst level %d",level)); | |
786 | return -EINVAL; | |
787 | } | |
788 | cifsFile->srch_inf.resume_name_len = len; | |
789 | cifsFile->srch_inf.presume_name = filename; | |
790 | return rc; | |
791 | } | |
792 | ||
793 | int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) | |
794 | { | |
795 | int rc = 0; | |
796 | int xid,i; | |
797 | struct cifs_sb_info *cifs_sb; | |
798 | struct cifsTconInfo *pTcon; | |
799 | struct cifsFileInfo *cifsFile = NULL; | |
800 | char * current_entry; | |
801 | int num_to_fill = 0; | |
802 | char * tmp_buf = NULL; | |
803 | char * end_of_smb; | |
804 | ||
805 | xid = GetXid(); | |
806 | ||
807 | if(file->f_dentry == NULL) { | |
808 | FreeXid(xid); | |
809 | return -EIO; | |
810 | } | |
811 | /* dump_cifs_file_struct(file, "Begin rdir "); */ | |
812 | ||
813 | cifs_sb = CIFS_SB(file->f_dentry->d_sb); | |
814 | pTcon = cifs_sb->tcon; | |
815 | if(pTcon == NULL) | |
816 | return -EINVAL; | |
817 | ||
818 | /* cFYI(1,("readdir2 pos: %lld",file->f_pos)); */ | |
819 | ||
820 | switch ((int) file->f_pos) { | |
821 | case 0: | |
822 | /*if (filldir(direntry, ".", 1, file->f_pos, | |
823 | file->f_dentry->d_inode->i_ino, DT_DIR) < 0) { | |
824 | cERROR(1, ("Filldir for current dir failed ")); | |
825 | rc = -ENOMEM; | |
826 | break; | |
827 | } | |
828 | file->f_pos++; */ | |
829 | case 1: | |
830 | /* if (filldir(direntry, "..", 2, file->f_pos, | |
831 | file->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) { | |
832 | cERROR(1, ("Filldir for parent dir failed ")); | |
833 | rc = -ENOMEM; | |
834 | break; | |
835 | } | |
836 | file->f_pos++; */ | |
837 | case 2: | |
838 | /* 1) If search is active, | |
839 | is in current search buffer? | |
840 | if it before then restart search | |
841 | if after then keep searching till find it */ | |
842 | ||
843 | if(file->private_data == NULL) { | |
844 | rc = initiate_cifs_search(xid,file); | |
845 | cFYI(1,("initiate cifs search rc %d",rc)); | |
846 | if(rc) { | |
847 | FreeXid(xid); | |
848 | return rc; | |
849 | } | |
850 | } | |
851 | default: | |
852 | if(file->private_data == NULL) { | |
853 | rc = -EINVAL; | |
854 | FreeXid(xid); | |
855 | return rc; | |
856 | } | |
857 | cifsFile = file->private_data; | |
858 | if (cifsFile->srch_inf.endOfSearch) { | |
859 | if(cifsFile->srch_inf.emptyDir) { | |
860 | cFYI(1, ("End of search, empty dir")); | |
861 | rc = 0; | |
862 | break; | |
863 | } | |
864 | } /* else { | |
865 | cifsFile->invalidHandle = TRUE; | |
866 | CIFSFindClose(xid, pTcon, cifsFile->netfid); | |
867 | } | |
868 | kfree(cifsFile->search_resume_name); | |
869 | cifsFile->search_resume_name = NULL; */ | |
870 | ||
871 | /* BB account for . and .. in f_pos as special case */ | |
872 | /* dump_cifs_file_struct(file, "rdir after default ");*/ | |
873 | ||
874 | rc = find_cifs_entry(xid,pTcon, file, | |
875 | ¤t_entry,&num_to_fill); | |
876 | if(rc) { | |
877 | cFYI(1,("fce error %d",rc)); | |
878 | goto rddir2_exit; | |
879 | } else if (current_entry != NULL) { | |
880 | cFYI(1,("entry %lld found",file->f_pos)); | |
881 | } else { | |
882 | cFYI(1,("could not find entry")); | |
883 | goto rddir2_exit; | |
884 | } | |
885 | cFYI(1,("loop through %d times filling dir for net buf %p", | |
886 | num_to_fill,cifsFile->srch_inf.ntwrk_buf_start)); | |
887 | end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + | |
888 | smbCalcSize((struct smb_hdr *) | |
889 | cifsFile->srch_inf.ntwrk_buf_start); | |
6a0b4824 SF |
890 | /* To be safe - for UCS to UTF-8 with strings loaded |
891 | with the rare long characters alloc more to account for | |
892 | such multibyte target UTF-8 characters. cifs_unicode.c, | |
893 | which actually does the conversion, has the same limit */ | |
894 | tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL); | |
1da177e4 LT |
895 | for(i=0;(i<num_to_fill) && (rc == 0);i++) { |
896 | if(current_entry == NULL) { | |
897 | /* evaluate whether this case is an error */ | |
898 | cERROR(1,("past end of SMB num to fill %d i %d", | |
899 | num_to_fill, i)); | |
900 | break; | |
901 | } | |
902 | ||
1da177e4 LT |
903 | rc = cifs_filldir(current_entry, file, |
904 | filldir, direntry,tmp_buf); | |
905 | file->f_pos++; | |
906 | if(file->f_pos == cifsFile->srch_inf.index_of_last_entry) { | |
907 | cFYI(1,("last entry in buf at pos %lld %s", | |
908 | file->f_pos,tmp_buf)); /* BB removeme BB */ | |
909 | cifs_save_resume_key(current_entry,cifsFile); | |
910 | break; | |
911 | } else | |
dfb7533b SF |
912 | current_entry = nxt_dir_entry(current_entry, |
913 | end_of_smb); | |
1da177e4 LT |
914 | } |
915 | kfree(tmp_buf); | |
916 | break; | |
917 | } /* end switch */ | |
918 | ||
919 | rddir2_exit: | |
920 | /* dump_cifs_file_struct(file, "end rdir "); */ | |
921 | FreeXid(xid); | |
922 | return rc; | |
923 | } |