Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * fs/cifs/readdir.c | |
3 | * | |
4 | * Directory search handling | |
5 | * | |
3677db10 | 6 | * Copyright (C) International Business Machines Corp., 2004, 2007 |
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)); |
e6a00296 | 71 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 LT |
72 | pTcon = cifs_sb->tcon; |
73 | ||
74 | qstring->hash = full_name_hash(qstring->name, qstring->len); | |
e6a00296 | 75 | tmp_dentry = d_lookup(file->f_path.dentry, qstring); |
1da177e4 | 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) { | |
e6a00296 | 81 | *ptmp_inode = new_inode(file->f_path.dentry->d_sb); |
1da177e4 LT |
82 | if(*ptmp_inode == NULL) |
83 | return rc; | |
84 | rc = 1; | |
1da177e4 | 85 | } |
1b2b2126 SF |
86 | if(file->f_path.dentry->d_sb->s_flags & MS_NOATIME) |
87 | (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME; | |
1da177e4 | 88 | } else { |
e6a00296 | 89 | tmp_dentry = d_alloc(file->f_path.dentry, qstring); |
1da177e4 LT |
90 | if(tmp_dentry == NULL) { |
91 | cERROR(1,("Failed allocating dentry")); | |
92 | *ptmp_inode = NULL; | |
93 | return rc; | |
94 | } | |
95 | ||
e6a00296 | 96 | *ptmp_inode = new_inode(file->f_path.dentry->d_sb); |
b92327fe SF |
97 | if (pTcon->nocase) |
98 | tmp_dentry->d_op = &cifs_ci_dentry_ops; | |
99 | else | |
100 | tmp_dentry->d_op = &cifs_dentry_ops; | |
1da177e4 LT |
101 | if(*ptmp_inode == NULL) |
102 | return rc; | |
1b2b2126 SF |
103 | if(file->f_path.dentry->d_sb->s_flags & MS_NOATIME) |
104 | (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME; | |
b835bebe | 105 | rc = 2; |
1da177e4 LT |
106 | } |
107 | ||
108 | tmp_dentry->d_time = jiffies; | |
109 | *pnew_dentry = tmp_dentry; | |
110 | return rc; | |
111 | } | |
112 | ||
533f90af SF |
113 | static void AdjustForTZ(struct cifsTconInfo * tcon, struct inode * inode) |
114 | { | |
115 | if((tcon) && (tcon->ses) && (tcon->ses->server)) { | |
ddae957d SF |
116 | inode->i_ctime.tv_sec += tcon->ses->server->timeAdj; |
117 | inode->i_mtime.tv_sec += tcon->ses->server->timeAdj; | |
118 | inode->i_atime.tv_sec += tcon->ses->server->timeAdj; | |
533f90af SF |
119 | } |
120 | return; | |
121 | } | |
122 | ||
123 | ||
5bafd765 SF |
124 | static void fill_in_inode(struct inode *tmp_inode, int new_buf_type, |
125 | char * buf, int *pobject_type, int isNewInode) | |
1da177e4 | 126 | { |
966ca923 SF |
127 | loff_t local_size; |
128 | struct timespec local_mtime; | |
129 | ||
1da177e4 LT |
130 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
131 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
5bafd765 SF |
132 | __u32 attr; |
133 | __u64 allocation_size; | |
134 | __u64 end_of_file; | |
1da177e4 | 135 | |
966ca923 SF |
136 | /* save mtime and size */ |
137 | local_mtime = tmp_inode->i_mtime; | |
138 | local_size = tmp_inode->i_size; | |
139 | ||
5bafd765 SF |
140 | if(new_buf_type) { |
141 | FILE_DIRECTORY_INFO *pfindData = (FILE_DIRECTORY_INFO *)buf; | |
142 | ||
143 | attr = le32_to_cpu(pfindData->ExtFileAttributes); | |
144 | allocation_size = le64_to_cpu(pfindData->AllocationSize); | |
145 | end_of_file = le64_to_cpu(pfindData->EndOfFile); | |
146 | tmp_inode->i_atime = | |
147 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); | |
148 | tmp_inode->i_mtime = | |
149 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime)); | |
150 | tmp_inode->i_ctime = | |
151 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime)); | |
152 | } else { /* legacy, OS2 and DOS style */ | |
1bd5bbcb | 153 | /* struct timespec ts;*/ |
5bafd765 SF |
154 | FIND_FILE_STANDARD_INFO * pfindData = |
155 | (FIND_FILE_STANDARD_INFO *)buf; | |
156 | ||
268f3be1 | 157 | tmp_inode->i_mtime = cnvrtDosUnixTm( |
1bd5bbcb | 158 | le16_to_cpu(pfindData->LastWriteDate), |
268f3be1 SF |
159 | le16_to_cpu(pfindData->LastWriteTime)); |
160 | tmp_inode->i_atime = cnvrtDosUnixTm( | |
161 | le16_to_cpu(pfindData->LastAccessDate), | |
162 | le16_to_cpu(pfindData->LastAccessTime)); | |
a850790f SF |
163 | tmp_inode->i_ctime = cnvrtDosUnixTm( |
164 | le16_to_cpu(pfindData->LastWriteDate), | |
165 | le16_to_cpu(pfindData->LastWriteTime)); | |
533f90af | 166 | AdjustForTZ(cifs_sb->tcon, tmp_inode); |
5bafd765 SF |
167 | attr = le16_to_cpu(pfindData->Attributes); |
168 | allocation_size = le32_to_cpu(pfindData->AllocationSize); | |
169 | end_of_file = le32_to_cpu(pfindData->DataSize); | |
5bafd765 SF |
170 | } |
171 | ||
1da177e4 | 172 | /* Linux can not store file creation time unfortunately so ignore it */ |
5bafd765 SF |
173 | |
174 | cifsInfo->cifsAttrs = attr; | |
175 | cifsInfo->time = jiffies; | |
176 | ||
1da177e4 LT |
177 | /* treat dos attribute of read-only as read-only mode bit e.g. 555? */ |
178 | /* 2767 perms - indicate mandatory locking */ | |
179 | /* BB fill in uid and gid here? with help from winbind? | |
180 | or retrieve from NTFS stream extended attribute */ | |
181 | if (atomic_read(&cifsInfo->inUse) == 0) { | |
182 | tmp_inode->i_uid = cifs_sb->mnt_uid; | |
183 | tmp_inode->i_gid = cifs_sb->mnt_gid; | |
184 | /* set default mode. will override for dirs below */ | |
185 | tmp_inode->i_mode = cifs_sb->mnt_file_mode; | |
3020a1f5 SF |
186 | } else { |
187 | /* mask off the type bits since it gets set | |
188 | below and we do not want to get two type | |
189 | bits set */ | |
190 | tmp_inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
191 | } |
192 | ||
1da177e4 LT |
193 | if (attr & ATTR_DIRECTORY) { |
194 | *pobject_type = DT_DIR; | |
195 | /* override default perms since we do not lock dirs */ | |
196 | if(atomic_read(&cifsInfo->inUse) == 0) { | |
197 | tmp_inode->i_mode = cifs_sb->mnt_dir_mode; | |
198 | } | |
199 | tmp_inode->i_mode |= S_IFDIR; | |
eda3c029 | 200 | } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && |
3020a1f5 SF |
201 | (attr & ATTR_SYSTEM)) { |
202 | if (end_of_file == 0) { | |
203 | *pobject_type = DT_FIFO; | |
204 | tmp_inode->i_mode |= S_IFIFO; | |
205 | } else { | |
206 | /* rather than get the type here, we mark the | |
207 | inode as needing revalidate and get the real type | |
208 | (blk vs chr vs. symlink) later ie in lookup */ | |
209 | *pobject_type = DT_REG; | |
210 | tmp_inode->i_mode |= S_IFREG; | |
211 | cifsInfo->time = 0; | |
212 | } | |
1da177e4 LT |
213 | /* we no longer mark these because we could not follow them */ |
214 | /* } else if (attr & ATTR_REPARSE) { | |
215 | *pobject_type = DT_LNK; | |
216 | tmp_inode->i_mode |= S_IFLNK; */ | |
217 | } else { | |
218 | *pobject_type = DT_REG; | |
219 | tmp_inode->i_mode |= S_IFREG; | |
220 | if (attr & ATTR_READONLY) | |
221 | tmp_inode->i_mode &= ~(S_IWUGO); | |
f5c1e2ea AT |
222 | else if ((tmp_inode->i_mode & S_IWUGO) == 0) |
223 | /* the ATTR_READONLY flag may have been changed on */ | |
224 | /* server -- set any w bits allowed by mnt_file_mode */ | |
225 | tmp_inode->i_mode |= (S_IWUGO & cifs_sb->mnt_file_mode); | |
1da177e4 LT |
226 | } /* could add code here - to validate if device or weird share type? */ |
227 | ||
228 | /* can not fill in nlink here as in qpathinfo version and Unx search */ | |
229 | if (atomic_read(&cifsInfo->inUse) == 0) { | |
230 | atomic_set(&cifsInfo->inUse, 1); | |
231 | } | |
232 | ||
3677db10 | 233 | spin_lock(&tmp_inode->i_lock); |
7ba52631 | 234 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { |
1da177e4 LT |
235 | /* can not safely change the file size here if the |
236 | client is writing to it due to potential races */ | |
237 | i_size_write(tmp_inode, end_of_file); | |
238 | ||
239 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
240 | /* for this calculation, even though the reported blocksize is larger */ | |
241 | tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9; | |
242 | } | |
3677db10 | 243 | spin_unlock(&tmp_inode->i_lock); |
1da177e4 LT |
244 | |
245 | if (allocation_size < end_of_file) | |
246 | cFYI(1, ("May be sparse file, allocation less than file size")); | |
ba52de12 | 247 | cFYI(1, ("File Size %ld and blocks %llu", |
5515eff8 | 248 | (unsigned long)tmp_inode->i_size, |
ba52de12 | 249 | (unsigned long long)tmp_inode->i_blocks)); |
1da177e4 | 250 | if (S_ISREG(tmp_inode->i_mode)) { |
966ca923 | 251 | cFYI(1, ("File inode")); |
1da177e4 | 252 | tmp_inode->i_op = &cifs_file_inode_ops; |
8b94bcb9 SF |
253 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
254 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
255 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; | |
256 | else | |
257 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
258 | ||
259 | } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
260 | tmp_inode->i_fop = &cifs_file_nobrl_ops; | |
1da177e4 LT |
261 | else |
262 | tmp_inode->i_fop = &cifs_file_ops; | |
f3f6ec4b | 263 | |
bfa0d75a SF |
264 | if((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
265 | (cifs_sb->tcon->ses->server->maxBuf < | |
273d81d6 DK |
266 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
267 | tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
268 | else | |
269 | tmp_inode->i_data.a_ops = &cifs_addr_ops; | |
270 | ||
966ca923 | 271 | if(isNewInode) |
dfb7533b SF |
272 | return; /* No sense invalidating pages for new inode |
273 | since have not started caching readahead file | |
274 | data yet */ | |
966ca923 SF |
275 | |
276 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
277 | (local_size == tmp_inode->i_size)) { | |
278 | cFYI(1, ("inode exists but unchanged")); | |
279 | } else { | |
280 | /* file may have changed on server */ | |
281 | cFYI(1, ("invalidate inode, readdir detected change")); | |
282 | invalidate_remote_inode(tmp_inode); | |
283 | } | |
1da177e4 | 284 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
966ca923 | 285 | cFYI(1, ("Directory inode")); |
1da177e4 LT |
286 | tmp_inode->i_op = &cifs_dir_inode_ops; |
287 | tmp_inode->i_fop = &cifs_dir_ops; | |
288 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
966ca923 | 289 | cFYI(1, ("Symbolic Link inode")); |
1da177e4 LT |
290 | tmp_inode->i_op = &cifs_symlink_inode_ops; |
291 | } else { | |
966ca923 | 292 | cFYI(1, ("Init special inode")); |
1da177e4 LT |
293 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
294 | tmp_inode->i_rdev); | |
295 | } | |
296 | } | |
297 | ||
298 | static void unix_fill_in_inode(struct inode *tmp_inode, | |
966ca923 | 299 | FILE_UNIX_INFO *pfindData, int *pobject_type, int isNewInode) |
1da177e4 | 300 | { |
966ca923 SF |
301 | loff_t local_size; |
302 | struct timespec local_mtime; | |
303 | ||
1da177e4 LT |
304 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
305 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
306 | ||
307 | __u32 type = le32_to_cpu(pfindData->Type); | |
308 | __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes); | |
309 | __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile); | |
310 | cifsInfo->time = jiffies; | |
311 | atomic_inc(&cifsInfo->inUse); | |
312 | ||
966ca923 SF |
313 | /* save mtime and size */ |
314 | local_mtime = tmp_inode->i_mtime; | |
315 | local_size = tmp_inode->i_size; | |
316 | ||
1da177e4 LT |
317 | tmp_inode->i_atime = |
318 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); | |
319 | tmp_inode->i_mtime = | |
320 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime)); | |
321 | tmp_inode->i_ctime = | |
322 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange)); | |
323 | ||
324 | tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions); | |
3020a1f5 SF |
325 | /* since we set the inode type below we need to mask off type |
326 | to avoid strange results if bits above were corrupt */ | |
327 | tmp_inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
328 | if (type == UNIX_FILE) { |
329 | *pobject_type = DT_REG; | |
330 | tmp_inode->i_mode |= S_IFREG; | |
331 | } else if (type == UNIX_SYMLINK) { | |
332 | *pobject_type = DT_LNK; | |
333 | tmp_inode->i_mode |= S_IFLNK; | |
334 | } else if (type == UNIX_DIR) { | |
335 | *pobject_type = DT_DIR; | |
336 | tmp_inode->i_mode |= S_IFDIR; | |
337 | } else if (type == UNIX_CHARDEV) { | |
338 | *pobject_type = DT_CHR; | |
339 | tmp_inode->i_mode |= S_IFCHR; | |
340 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
341 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
342 | } else if (type == UNIX_BLOCKDEV) { | |
343 | *pobject_type = DT_BLK; | |
344 | tmp_inode->i_mode |= S_IFBLK; | |
345 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
346 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
347 | } else if (type == UNIX_FIFO) { | |
348 | *pobject_type = DT_FIFO; | |
349 | tmp_inode->i_mode |= S_IFIFO; | |
350 | } else if (type == UNIX_SOCKET) { | |
351 | *pobject_type = DT_SOCK; | |
352 | tmp_inode->i_mode |= S_IFSOCK; | |
3020a1f5 SF |
353 | } else { |
354 | /* safest to just call it a file */ | |
355 | *pobject_type = DT_REG; | |
356 | tmp_inode->i_mode |= S_IFREG; | |
357 | cFYI(1,("unknown inode type %d",type)); | |
1da177e4 LT |
358 | } |
359 | ||
360 | tmp_inode->i_uid = le64_to_cpu(pfindData->Uid); | |
361 | tmp_inode->i_gid = le64_to_cpu(pfindData->Gid); | |
362 | tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks); | |
363 | ||
3677db10 | 364 | spin_lock(&tmp_inode->i_lock); |
7ba52631 | 365 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { |
1da177e4 LT |
366 | /* can not safely change the file size here if the |
367 | client is writing to it due to potential races */ | |
7ba52631 | 368 | i_size_write(tmp_inode, end_of_file); |
1da177e4 LT |
369 | |
370 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
371 | /* for this calculation, not the real blocksize */ | |
372 | tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; | |
373 | } | |
3677db10 | 374 | spin_unlock(&tmp_inode->i_lock); |
1da177e4 LT |
375 | |
376 | if (S_ISREG(tmp_inode->i_mode)) { | |
377 | cFYI(1, ("File inode")); | |
378 | tmp_inode->i_op = &cifs_file_inode_ops; | |
f3f6ec4b SF |
379 | |
380 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { | |
381 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
382 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; | |
383 | else | |
384 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
385 | ||
386 | } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
387 | tmp_inode->i_fop = &cifs_file_nobrl_ops; | |
1da177e4 LT |
388 | else |
389 | tmp_inode->i_fop = &cifs_file_ops; | |
f3f6ec4b | 390 | |
bfa0d75a SF |
391 | if((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
392 | (cifs_sb->tcon->ses->server->maxBuf < | |
273d81d6 DK |
393 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
394 | tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
395 | else | |
396 | tmp_inode->i_data.a_ops = &cifs_addr_ops; | |
966ca923 SF |
397 | |
398 | if(isNewInode) | |
399 | return; /* No sense invalidating pages for new inode since we | |
400 | have not started caching readahead file data yet */ | |
401 | ||
402 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
403 | (local_size == tmp_inode->i_size)) { | |
404 | cFYI(1, ("inode exists but unchanged")); | |
405 | } else { | |
406 | /* file may have changed on server */ | |
407 | cFYI(1, ("invalidate inode, readdir detected change")); | |
408 | invalidate_remote_inode(tmp_inode); | |
409 | } | |
1da177e4 LT |
410 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
411 | cFYI(1, ("Directory inode")); | |
412 | tmp_inode->i_op = &cifs_dir_inode_ops; | |
413 | tmp_inode->i_fop = &cifs_dir_ops; | |
414 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
415 | cFYI(1, ("Symbolic Link inode")); | |
416 | tmp_inode->i_op = &cifs_symlink_inode_ops; | |
417 | /* tmp_inode->i_fop = *//* do not need to set to anything */ | |
418 | } else { | |
419 | cFYI(1, ("Special inode")); | |
420 | init_special_inode(tmp_inode, tmp_inode->i_mode, | |
421 | tmp_inode->i_rdev); | |
422 | } | |
423 | } | |
424 | ||
425 | static int initiate_cifs_search(const int xid, struct file *file) | |
426 | { | |
427 | int rc = 0; | |
428 | char * full_path; | |
429 | struct cifsFileInfo * cifsFile; | |
430 | struct cifs_sb_info *cifs_sb; | |
431 | struct cifsTconInfo *pTcon; | |
432 | ||
433 | if(file->private_data == NULL) { | |
434 | file->private_data = | |
435 | kmalloc(sizeof(struct cifsFileInfo),GFP_KERNEL); | |
436 | } | |
437 | ||
438 | if(file->private_data == NULL) { | |
439 | return -ENOMEM; | |
440 | } else { | |
441 | memset(file->private_data,0,sizeof(struct cifsFileInfo)); | |
442 | } | |
443 | cifsFile = file->private_data; | |
444 | cifsFile->invalidHandle = TRUE; | |
445 | cifsFile->srch_inf.endOfSearch = FALSE; | |
446 | ||
e6a00296 | 447 | if(file->f_path.dentry == NULL) |
1da177e4 LT |
448 | return -ENOENT; |
449 | ||
e6a00296 | 450 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 LT |
451 | if(cifs_sb == NULL) |
452 | return -EINVAL; | |
453 | ||
454 | pTcon = cifs_sb->tcon; | |
455 | if(pTcon == NULL) | |
456 | return -EINVAL; | |
457 | ||
e6a00296 | 458 | full_path = build_path_from_dentry(file->f_path.dentry); |
1da177e4 LT |
459 | |
460 | if(full_path == NULL) { | |
461 | return -ENOMEM; | |
462 | } | |
463 | ||
966ca923 | 464 | cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos)); |
1da177e4 | 465 | |
75cf6bdc | 466 | ffirst_retry: |
1da177e4 LT |
467 | /* test for Unix extensions */ |
468 | if (pTcon->ses->capabilities & CAP_UNIX) { | |
5bafd765 SF |
469 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX; |
470 | } else if ((pTcon->ses->capabilities & | |
471 | (CAP_NT_SMBS | CAP_NT_FIND)) == 0) { | |
472 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD; | |
1da177e4 LT |
473 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
474 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; | |
475 | } else /* not srvinos - BB fixme add check for backlevel? */ { | |
476 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
477 | } | |
478 | ||
737b758c SF |
479 | rc = CIFSFindFirst(xid, pTcon,full_path,cifs_sb->local_nls, |
480 | &cifsFile->netfid, &cifsFile->srch_inf, | |
eafe8701 SF |
481 | cifs_sb->mnt_cifs_flags & |
482 | CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); | |
1da177e4 LT |
483 | if(rc == 0) |
484 | cifsFile->invalidHandle = FALSE; | |
75cf6bdc SF |
485 | if((rc == -EOPNOTSUPP) && |
486 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { | |
487 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; | |
488 | goto ffirst_retry; | |
489 | } | |
1da177e4 LT |
490 | kfree(full_path); |
491 | return rc; | |
492 | } | |
493 | ||
494 | /* return length of unicode string in bytes */ | |
495 | static int cifs_unicode_bytelen(char *str) | |
496 | { | |
497 | int len; | |
498 | __le16 * ustr = (__le16 *)str; | |
499 | ||
500 | for(len=0;len <= PATH_MAX;len++) { | |
501 | if(ustr[len] == 0) | |
502 | return len << 1; | |
503 | } | |
504 | cFYI(1,("Unicode string longer than PATH_MAX found")); | |
505 | return len << 1; | |
506 | } | |
507 | ||
5bafd765 | 508 | static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level) |
1da177e4 LT |
509 | { |
510 | char * new_entry; | |
511 | FILE_DIRECTORY_INFO * pDirInfo = (FILE_DIRECTORY_INFO *)old_entry; | |
512 | ||
5bafd765 SF |
513 | if(level == SMB_FIND_FILE_INFO_STANDARD) { |
514 | FIND_FILE_STANDARD_INFO * pfData; | |
515 | pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo; | |
516 | ||
517 | new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) + | |
518 | pfData->FileNameLength; | |
519 | } else | |
520 | new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset); | |
1da177e4 LT |
521 | cFYI(1,("new entry %p old entry %p",new_entry,old_entry)); |
522 | /* validate that new_entry is not past end of SMB */ | |
523 | if(new_entry >= end_of_smb) { | |
09d1db5c SF |
524 | cERROR(1, |
525 | ("search entry %p began after end of SMB %p old entry %p", | |
526 | new_entry, end_of_smb, old_entry)); | |
1da177e4 | 527 | return NULL; |
5bafd765 SF |
528 | } else if(((level == SMB_FIND_FILE_INFO_STANDARD) && |
529 | (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) || | |
530 | ((level != SMB_FIND_FILE_INFO_STANDARD) && | |
531 | (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) { | |
09d1db5c SF |
532 | cERROR(1,("search entry %p extends after end of SMB %p", |
533 | new_entry, end_of_smb)); | |
534 | return NULL; | |
535 | } else | |
1da177e4 LT |
536 | return new_entry; |
537 | ||
538 | } | |
539 | ||
540 | #define UNICODE_DOT cpu_to_le16(0x2e) | |
541 | ||
542 | /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */ | |
543 | static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile) | |
544 | { | |
545 | int rc = 0; | |
546 | char * filename = NULL; | |
547 | int len = 0; | |
548 | ||
5bafd765 | 549 | if(cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) { |
1da177e4 LT |
550 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; |
551 | filename = &pFindData->FileName[0]; | |
552 | if(cfile->srch_inf.unicode) { | |
553 | len = cifs_unicode_bytelen(filename); | |
554 | } else { | |
555 | /* BB should we make this strnlen of PATH_MAX? */ | |
556 | len = strnlen(filename, 5); | |
557 | } | |
5bafd765 | 558 | } else if(cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) { |
1da177e4 LT |
559 | FILE_DIRECTORY_INFO * pFindData = |
560 | (FILE_DIRECTORY_INFO *)current_entry; | |
561 | filename = &pFindData->FileName[0]; | |
562 | len = le32_to_cpu(pFindData->FileNameLength); | |
5bafd765 SF |
563 | } else if(cfile->srch_inf.info_level == |
564 | SMB_FIND_FILE_FULL_DIRECTORY_INFO) { | |
1da177e4 LT |
565 | FILE_FULL_DIRECTORY_INFO * pFindData = |
566 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
567 | filename = &pFindData->FileName[0]; | |
568 | len = le32_to_cpu(pFindData->FileNameLength); | |
5bafd765 SF |
569 | } else if(cfile->srch_inf.info_level == |
570 | SMB_FIND_FILE_ID_FULL_DIR_INFO) { | |
1da177e4 LT |
571 | SEARCH_ID_FULL_DIR_INFO * pFindData = |
572 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
573 | filename = &pFindData->FileName[0]; | |
574 | len = le32_to_cpu(pFindData->FileNameLength); | |
5bafd765 SF |
575 | } else if(cfile->srch_inf.info_level == |
576 | SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { | |
1da177e4 LT |
577 | FILE_BOTH_DIRECTORY_INFO * pFindData = |
578 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
579 | filename = &pFindData->FileName[0]; | |
580 | len = le32_to_cpu(pFindData->FileNameLength); | |
5bafd765 SF |
581 | } else if(cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) { |
582 | FIND_FILE_STANDARD_INFO * pFindData = | |
583 | (FIND_FILE_STANDARD_INFO *)current_entry; | |
584 | filename = &pFindData->FileName[0]; | |
5ddaa683 | 585 | len = pFindData->FileNameLength; |
1da177e4 LT |
586 | } else { |
587 | cFYI(1,("Unknown findfirst level %d",cfile->srch_inf.info_level)); | |
588 | } | |
589 | ||
590 | if(filename) { | |
591 | if(cfile->srch_inf.unicode) { | |
592 | __le16 *ufilename = (__le16 *)filename; | |
593 | if(len == 2) { | |
594 | /* check for . */ | |
595 | if(ufilename[0] == UNICODE_DOT) | |
596 | rc = 1; | |
597 | } else if(len == 4) { | |
598 | /* check for .. */ | |
599 | if((ufilename[0] == UNICODE_DOT) | |
600 | &&(ufilename[1] == UNICODE_DOT)) | |
601 | rc = 2; | |
602 | } | |
603 | } else /* ASCII */ { | |
604 | if(len == 1) { | |
605 | if(filename[0] == '.') | |
606 | rc = 1; | |
607 | } else if(len == 2) { | |
608 | if((filename[0] == '.') && (filename[1] == '.')) | |
609 | rc = 2; | |
610 | } | |
611 | } | |
612 | } | |
613 | ||
614 | return rc; | |
615 | } | |
616 | ||
eafe8701 SF |
617 | /* Check if directory that we are searching has changed so we can decide |
618 | whether we can use the cached search results from the previous search */ | |
619 | static int is_dir_changed(struct file * file) | |
620 | { | |
621 | struct inode * inode; | |
622 | struct cifsInodeInfo *cifsInfo; | |
623 | ||
e6a00296 | 624 | if(file->f_path.dentry == NULL) |
eafe8701 SF |
625 | return 0; |
626 | ||
e6a00296 | 627 | inode = file->f_path.dentry->d_inode; |
eafe8701 SF |
628 | |
629 | if(inode == NULL) | |
630 | return 0; | |
631 | ||
632 | cifsInfo = CIFS_I(inode); | |
633 | ||
634 | if(cifsInfo->time == 0) | |
635 | return 1; /* directory was changed, perhaps due to unlink */ | |
636 | else | |
637 | return 0; | |
638 | ||
639 | } | |
640 | ||
1da177e4 LT |
641 | /* find the corresponding entry in the search */ |
642 | /* Note that the SMB server returns search entries for . and .. which | |
643 | complicates logic here if we choose to parse for them and we do not | |
644 | assume that they are located in the findfirst return buffer.*/ | |
645 | /* We start counting in the buffer with entry 2 and increment for every | |
646 | entry (do not increment for . or .. entry) */ | |
647 | static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon, | |
648 | struct file *file, char **ppCurrentEntry, int *num_to_ret) | |
649 | { | |
650 | int rc = 0; | |
651 | int pos_in_buf = 0; | |
652 | loff_t first_entry_in_buffer; | |
653 | loff_t index_to_find = file->f_pos; | |
654 | struct cifsFileInfo * cifsFile = file->private_data; | |
655 | /* check if index in the buffer */ | |
656 | ||
eafe8701 SF |
657 | if((cifsFile == NULL) || (ppCurrentEntry == NULL) || |
658 | (num_to_ret == NULL)) | |
1da177e4 LT |
659 | return -ENOENT; |
660 | ||
661 | *ppCurrentEntry = NULL; | |
662 | first_entry_in_buffer = | |
663 | cifsFile->srch_inf.index_of_last_entry - | |
664 | cifsFile->srch_inf.entries_in_buffer; | |
60808233 SF |
665 | |
666 | /* if first entry in buf is zero then is first buffer | |
667 | in search response data which means it is likely . and .. | |
668 | will be in this buffer, although some servers do not return | |
669 | . and .. for the root of a drive and for those we need | |
670 | to start two entries earlier */ | |
671 | ||
3979877e SF |
672 | #ifdef CONFIG_CIFS_DEBUG2 |
673 | dump_cifs_file_struct(file, "In fce "); | |
674 | #endif | |
eafe8701 SF |
675 | if(((index_to_find < cifsFile->srch_inf.index_of_last_entry) && |
676 | is_dir_changed(file)) || | |
677 | (index_to_find < first_entry_in_buffer)) { | |
1da177e4 LT |
678 | /* close and restart search */ |
679 | cFYI(1,("search backing up - close and restart search")); | |
680 | cifsFile->invalidHandle = TRUE; | |
681 | CIFSFindClose(xid, pTcon, cifsFile->netfid); | |
682 | kfree(cifsFile->search_resume_name); | |
683 | cifsFile->search_resume_name = NULL; | |
684 | if(cifsFile->srch_inf.ntwrk_buf_start) { | |
685 | cFYI(1,("freeing SMB ff cache buf on search rewind")); | |
d47d7c1a SF |
686 | if(cifsFile->srch_inf.smallBuf) |
687 | cifs_small_buf_release(cifsFile->srch_inf. | |
688 | ntwrk_buf_start); | |
689 | else | |
690 | cifs_buf_release(cifsFile->srch_inf. | |
691 | ntwrk_buf_start); | |
1da177e4 LT |
692 | } |
693 | rc = initiate_cifs_search(xid,file); | |
694 | if(rc) { | |
695 | cFYI(1,("error %d reinitiating a search on rewind",rc)); | |
696 | return rc; | |
697 | } | |
698 | } | |
699 | ||
700 | while((index_to_find >= cifsFile->srch_inf.index_of_last_entry) && | |
701 | (rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)){ | |
702 | cFYI(1,("calling findnext2")); | |
dfb7533b SF |
703 | rc = CIFSFindNext(xid,pTcon,cifsFile->netfid, |
704 | &cifsFile->srch_inf); | |
1da177e4 LT |
705 | if(rc) |
706 | return -ENOENT; | |
707 | } | |
708 | if(index_to_find < cifsFile->srch_inf.index_of_last_entry) { | |
709 | /* we found the buffer that contains the entry */ | |
710 | /* scan and find it */ | |
711 | int i; | |
712 | char * current_entry; | |
713 | char * end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + | |
714 | smbCalcSize((struct smb_hdr *) | |
715 | cifsFile->srch_inf.ntwrk_buf_start); | |
60808233 SF |
716 | |
717 | current_entry = cifsFile->srch_inf.srch_entries_start; | |
1da177e4 LT |
718 | first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry |
719 | - cifsFile->srch_inf.entries_in_buffer; | |
720 | pos_in_buf = index_to_find - first_entry_in_buffer; | |
5bafd765 SF |
721 | cFYI(1,("found entry - pos_in_buf %d",pos_in_buf)); |
722 | ||
1da177e4 | 723 | for(i=0;(i<(pos_in_buf)) && (current_entry != NULL);i++) { |
dfb7533b | 724 | /* go entry by entry figuring out which is first */ |
5bafd765 SF |
725 | current_entry = nxt_dir_entry(current_entry,end_of_smb, |
726 | cifsFile->srch_inf.info_level); | |
1da177e4 LT |
727 | } |
728 | if((current_entry == NULL) && (i < pos_in_buf)) { | |
729 | /* BB fixme - check if we should flag this error */ | |
730 | cERROR(1,("reached end of buf searching for pos in buf" | |
731 | " %d index to find %lld rc %d", | |
732 | pos_in_buf,index_to_find,rc)); | |
733 | } | |
734 | rc = 0; | |
735 | *ppCurrentEntry = current_entry; | |
736 | } else { | |
737 | cFYI(1,("index not in buffer - could not findnext into it")); | |
738 | return 0; | |
739 | } | |
740 | ||
741 | if(pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) { | |
eafe8701 | 742 | cFYI(1,("can not return entries pos_in_buf beyond last entry")); |
1da177e4 LT |
743 | *num_to_ret = 0; |
744 | } else | |
745 | *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf; | |
1da177e4 LT |
746 | |
747 | return rc; | |
748 | } | |
749 | ||
750 | /* inode num, inode type and filename returned */ | |
751 | static int cifs_get_name_from_search_buf(struct qstr *pqst, | |
752 | char *current_entry, __u16 level, unsigned int unicode, | |
5bafd765 | 753 | struct cifs_sb_info * cifs_sb, int max_len, ino_t *pinum) |
1da177e4 LT |
754 | { |
755 | int rc = 0; | |
756 | unsigned int len = 0; | |
757 | char * filename; | |
758 | struct nls_table * nlt = cifs_sb->local_nls; | |
759 | ||
760 | *pinum = 0; | |
761 | ||
762 | if(level == SMB_FIND_FILE_UNIX) { | |
763 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; | |
764 | ||
765 | filename = &pFindData->FileName[0]; | |
766 | if(unicode) { | |
767 | len = cifs_unicode_bytelen(filename); | |
768 | } else { | |
769 | /* BB should we make this strnlen of PATH_MAX? */ | |
770 | len = strnlen(filename, PATH_MAX); | |
771 | } | |
772 | ||
773 | /* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */ | |
774 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
775 | *pinum = pFindData->UniqueId; | |
776 | } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) { | |
777 | FILE_DIRECTORY_INFO * pFindData = | |
778 | (FILE_DIRECTORY_INFO *)current_entry; | |
779 | filename = &pFindData->FileName[0]; | |
780 | len = le32_to_cpu(pFindData->FileNameLength); | |
781 | } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { | |
782 | FILE_FULL_DIRECTORY_INFO * pFindData = | |
783 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
784 | filename = &pFindData->FileName[0]; | |
785 | len = le32_to_cpu(pFindData->FileNameLength); | |
786 | } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { | |
787 | SEARCH_ID_FULL_DIR_INFO * pFindData = | |
788 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
789 | filename = &pFindData->FileName[0]; | |
790 | len = le32_to_cpu(pFindData->FileNameLength); | |
791 | *pinum = pFindData->UniqueId; | |
792 | } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { | |
793 | FILE_BOTH_DIRECTORY_INFO * pFindData = | |
794 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
795 | filename = &pFindData->FileName[0]; | |
796 | len = le32_to_cpu(pFindData->FileNameLength); | |
5bafd765 SF |
797 | } else if(level == SMB_FIND_FILE_INFO_STANDARD) { |
798 | FIND_FILE_STANDARD_INFO * pFindData = | |
799 | (FIND_FILE_STANDARD_INFO *)current_entry; | |
800 | filename = &pFindData->FileName[0]; | |
801 | /* one byte length, no name conversion */ | |
802 | len = (unsigned int)pFindData->FileNameLength; | |
1da177e4 LT |
803 | } else { |
804 | cFYI(1,("Unknown findfirst level %d",level)); | |
805 | return -EINVAL; | |
806 | } | |
5bafd765 SF |
807 | |
808 | if(len > max_len) { | |
809 | cERROR(1,("bad search response length %d past smb end", len)); | |
810 | return -EINVAL; | |
811 | } | |
812 | ||
1da177e4 LT |
813 | if(unicode) { |
814 | /* BB fixme - test with long names */ | |
815 | /* Note converted filename can be longer than in unicode */ | |
6a0b4824 SF |
816 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) |
817 | pqst->len = cifs_convertUCSpath((char *)pqst->name, | |
818 | (__le16 *)filename, len/2, nlt); | |
819 | else | |
6a0b4824 | 820 | pqst->len = cifs_strfromUCS_le((char *)pqst->name, |
e89dc920 | 821 | (__le16 *)filename,len/2,nlt); |
1da177e4 LT |
822 | } else { |
823 | pqst->name = filename; | |
824 | pqst->len = len; | |
825 | } | |
826 | pqst->hash = full_name_hash(pqst->name,pqst->len); | |
827 | /* cFYI(1,("filldir on %s",pqst->name)); */ | |
828 | return rc; | |
829 | } | |
830 | ||
831 | static int cifs_filldir(char *pfindEntry, struct file *file, | |
5bafd765 | 832 | filldir_t filldir, void *direntry, char *scratch_buf, int max_len) |
1da177e4 LT |
833 | { |
834 | int rc = 0; | |
835 | struct qstr qstring; | |
836 | struct cifsFileInfo * pCifsF; | |
837 | unsigned obj_type; | |
838 | ino_t inum; | |
839 | struct cifs_sb_info * cifs_sb; | |
840 | struct inode *tmp_inode; | |
841 | struct dentry *tmp_dentry; | |
842 | ||
843 | /* get filename and len into qstring */ | |
844 | /* get dentry */ | |
845 | /* decide whether to create and populate ionde */ | |
846 | if((direntry == NULL) || (file == NULL)) | |
847 | return -EINVAL; | |
848 | ||
849 | pCifsF = file->private_data; | |
850 | ||
851 | if((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL)) | |
852 | return -ENOENT; | |
853 | ||
e6a00296 | 854 | if(file->f_path.dentry == NULL) |
1da177e4 LT |
855 | return -ENOENT; |
856 | ||
b66ac3ea | 857 | rc = cifs_entry_is_dot(pfindEntry,pCifsF); |
60808233 SF |
858 | /* skip . and .. since we added them first */ |
859 | if(rc != 0) | |
860 | return 0; | |
861 | ||
e6a00296 | 862 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 LT |
863 | |
864 | qstring.name = scratch_buf; | |
865 | rc = cifs_get_name_from_search_buf(&qstring,pfindEntry, | |
866 | pCifsF->srch_inf.info_level, | |
867 | pCifsF->srch_inf.unicode,cifs_sb, | |
5bafd765 | 868 | max_len, |
1da177e4 LT |
869 | &inum /* returned */); |
870 | ||
871 | if(rc) | |
872 | return rc; | |
873 | ||
874 | rc = construct_dentry(&qstring,file,&tmp_inode, &tmp_dentry); | |
875 | if((tmp_inode == NULL) || (tmp_dentry == NULL)) | |
876 | return -ENOMEM; | |
877 | ||
878 | if(rc) { | |
879 | /* inode created, we need to hash it with right inode number */ | |
880 | if(inum != 0) { | |
881 | /* BB fixme - hash the 2 32 quantities bits together if necessary BB */ | |
882 | tmp_inode->i_ino = inum; | |
883 | } | |
884 | insert_inode_hash(tmp_inode); | |
885 | } | |
886 | ||
966ca923 SF |
887 | /* we pass in rc below, indicating whether it is a new inode, |
888 | so we can figure out whether to invalidate the inode cached | |
889 | data if the file has changed */ | |
5bafd765 | 890 | if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) |
966ca923 | 891 | unix_fill_in_inode(tmp_inode, |
5bafd765 SF |
892 | (FILE_UNIX_INFO *)pfindEntry, |
893 | &obj_type, rc); | |
894 | else if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) | |
895 | fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */, | |
896 | pfindEntry, &obj_type, rc); | |
897 | else | |
898 | fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc); | |
b835bebe SF |
899 | |
900 | if(rc) /* new inode - needs to be tied to dentry */ { | |
901 | d_instantiate(tmp_dentry, tmp_inode); | |
902 | if(rc == 2) | |
903 | d_rehash(tmp_dentry); | |
904 | } | |
5bafd765 | 905 | |
1da177e4 | 906 | |
dfb7533b SF |
907 | rc = filldir(direntry,qstring.name,qstring.len,file->f_pos, |
908 | tmp_inode->i_ino,obj_type); | |
1da177e4 LT |
909 | if(rc) { |
910 | cFYI(1,("filldir rc = %d",rc)); | |
7ca85ba7 SF |
911 | /* we can not return filldir errors to the caller |
912 | since they are "normal" when the stat blocksize | |
913 | is too small - we return remapped error instead */ | |
914 | rc = -EOVERFLOW; | |
1da177e4 LT |
915 | } |
916 | ||
917 | dput(tmp_dentry); | |
918 | return rc; | |
919 | } | |
920 | ||
921 | static int cifs_save_resume_key(const char *current_entry, | |
922 | struct cifsFileInfo *cifsFile) | |
923 | { | |
924 | int rc = 0; | |
925 | unsigned int len = 0; | |
926 | __u16 level; | |
927 | char * filename; | |
928 | ||
929 | if((cifsFile == NULL) || (current_entry == NULL)) | |
930 | return -EINVAL; | |
931 | ||
932 | level = cifsFile->srch_inf.info_level; | |
933 | ||
934 | if(level == SMB_FIND_FILE_UNIX) { | |
935 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; | |
936 | ||
937 | filename = &pFindData->FileName[0]; | |
938 | if(cifsFile->srch_inf.unicode) { | |
939 | len = cifs_unicode_bytelen(filename); | |
940 | } else { | |
941 | /* BB should we make this strnlen of PATH_MAX? */ | |
942 | len = strnlen(filename, PATH_MAX); | |
943 | } | |
944 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; | |
945 | } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) { | |
946 | FILE_DIRECTORY_INFO * pFindData = | |
947 | (FILE_DIRECTORY_INFO *)current_entry; | |
948 | filename = &pFindData->FileName[0]; | |
949 | len = le32_to_cpu(pFindData->FileNameLength); | |
950 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
951 | } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { | |
952 | FILE_FULL_DIRECTORY_INFO * pFindData = | |
953 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
954 | filename = &pFindData->FileName[0]; | |
955 | len = le32_to_cpu(pFindData->FileNameLength); | |
956 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
957 | } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { | |
958 | SEARCH_ID_FULL_DIR_INFO * pFindData = | |
959 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
960 | filename = &pFindData->FileName[0]; | |
961 | len = le32_to_cpu(pFindData->FileNameLength); | |
962 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
963 | } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { | |
964 | FILE_BOTH_DIRECTORY_INFO * pFindData = | |
965 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
966 | filename = &pFindData->FileName[0]; | |
967 | len = le32_to_cpu(pFindData->FileNameLength); | |
968 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
5bafd765 SF |
969 | } else if(level == SMB_FIND_FILE_INFO_STANDARD) { |
970 | FIND_FILE_STANDARD_INFO * pFindData = | |
971 | (FIND_FILE_STANDARD_INFO *)current_entry; | |
972 | filename = &pFindData->FileName[0]; | |
973 | /* one byte length, no name conversion */ | |
974 | len = (unsigned int)pFindData->FileNameLength; | |
203cf2fc | 975 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; |
1da177e4 LT |
976 | } else { |
977 | cFYI(1,("Unknown findfirst level %d",level)); | |
978 | return -EINVAL; | |
979 | } | |
980 | cifsFile->srch_inf.resume_name_len = len; | |
981 | cifsFile->srch_inf.presume_name = filename; | |
982 | return rc; | |
983 | } | |
984 | ||
985 | int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) | |
986 | { | |
987 | int rc = 0; | |
988 | int xid,i; | |
989 | struct cifs_sb_info *cifs_sb; | |
990 | struct cifsTconInfo *pTcon; | |
991 | struct cifsFileInfo *cifsFile = NULL; | |
992 | char * current_entry; | |
993 | int num_to_fill = 0; | |
994 | char * tmp_buf = NULL; | |
995 | char * end_of_smb; | |
5bafd765 | 996 | int max_len; |
1da177e4 LT |
997 | |
998 | xid = GetXid(); | |
999 | ||
e6a00296 | 1000 | if(file->f_path.dentry == NULL) { |
1da177e4 LT |
1001 | FreeXid(xid); |
1002 | return -EIO; | |
1003 | } | |
1da177e4 | 1004 | |
e6a00296 | 1005 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 LT |
1006 | pTcon = cifs_sb->tcon; |
1007 | if(pTcon == NULL) | |
1008 | return -EINVAL; | |
1009 | ||
1da177e4 LT |
1010 | switch ((int) file->f_pos) { |
1011 | case 0: | |
60808233 | 1012 | if (filldir(direntry, ".", 1, file->f_pos, |
e6a00296 | 1013 | file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) { |
60808233 | 1014 | cERROR(1, ("Filldir for current dir failed")); |
1da177e4 LT |
1015 | rc = -ENOMEM; |
1016 | break; | |
1017 | } | |
60808233 | 1018 | file->f_pos++; |
1da177e4 | 1019 | case 1: |
60808233 | 1020 | if (filldir(direntry, "..", 2, file->f_pos, |
e6a00296 | 1021 | file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) { |
26a21b98 | 1022 | cERROR(1, ("Filldir for parent dir failed")); |
1da177e4 LT |
1023 | rc = -ENOMEM; |
1024 | break; | |
1025 | } | |
60808233 SF |
1026 | file->f_pos++; |
1027 | default: | |
1da177e4 LT |
1028 | /* 1) If search is active, |
1029 | is in current search buffer? | |
1030 | if it before then restart search | |
1031 | if after then keep searching till find it */ | |
1032 | ||
1033 | if(file->private_data == NULL) { | |
1034 | rc = initiate_cifs_search(xid,file); | |
1035 | cFYI(1,("initiate cifs search rc %d",rc)); | |
1036 | if(rc) { | |
1037 | FreeXid(xid); | |
1038 | return rc; | |
1039 | } | |
1040 | } | |
1da177e4 LT |
1041 | if(file->private_data == NULL) { |
1042 | rc = -EINVAL; | |
1043 | FreeXid(xid); | |
1044 | return rc; | |
1045 | } | |
1046 | cifsFile = file->private_data; | |
1047 | if (cifsFile->srch_inf.endOfSearch) { | |
1048 | if(cifsFile->srch_inf.emptyDir) { | |
1049 | cFYI(1, ("End of search, empty dir")); | |
1050 | rc = 0; | |
1051 | break; | |
1052 | } | |
1053 | } /* else { | |
1054 | cifsFile->invalidHandle = TRUE; | |
1055 | CIFSFindClose(xid, pTcon, cifsFile->netfid); | |
1056 | } | |
1057 | kfree(cifsFile->search_resume_name); | |
1058 | cifsFile->search_resume_name = NULL; */ | |
1059 | ||
1da177e4 LT |
1060 | rc = find_cifs_entry(xid,pTcon, file, |
1061 | ¤t_entry,&num_to_fill); | |
1062 | if(rc) { | |
1063 | cFYI(1,("fce error %d",rc)); | |
1064 | goto rddir2_exit; | |
1065 | } else if (current_entry != NULL) { | |
1066 | cFYI(1,("entry %lld found",file->f_pos)); | |
1067 | } else { | |
1068 | cFYI(1,("could not find entry")); | |
1069 | goto rddir2_exit; | |
1070 | } | |
1071 | cFYI(1,("loop through %d times filling dir for net buf %p", | |
5bafd765 SF |
1072 | num_to_fill,cifsFile->srch_inf.ntwrk_buf_start)); |
1073 | max_len = smbCalcSize((struct smb_hdr *) | |
1074 | cifsFile->srch_inf.ntwrk_buf_start); | |
1075 | end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len; | |
1076 | ||
6a0b4824 SF |
1077 | /* To be safe - for UCS to UTF-8 with strings loaded |
1078 | with the rare long characters alloc more to account for | |
1079 | such multibyte target UTF-8 characters. cifs_unicode.c, | |
1080 | which actually does the conversion, has the same limit */ | |
1081 | tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL); | |
1da177e4 LT |
1082 | for(i=0;(i<num_to_fill) && (rc == 0);i++) { |
1083 | if(current_entry == NULL) { | |
1084 | /* evaluate whether this case is an error */ | |
1085 | cERROR(1,("past end of SMB num to fill %d i %d", | |
1086 | num_to_fill, i)); | |
1087 | break; | |
1088 | } | |
60808233 SF |
1089 | /* if buggy server returns . and .. late do |
1090 | we want to check for that here? */ | |
5bafd765 SF |
1091 | rc = cifs_filldir(current_entry, file, |
1092 | filldir, direntry, tmp_buf, max_len); | |
7ca85ba7 SF |
1093 | if(rc == -EOVERFLOW) { |
1094 | rc = 0; | |
1095 | break; | |
1096 | } | |
1097 | ||
1da177e4 | 1098 | file->f_pos++; |
3979877e SF |
1099 | if(file->f_pos == |
1100 | cifsFile->srch_inf.index_of_last_entry) { | |
1da177e4 | 1101 | cFYI(1,("last entry in buf at pos %lld %s", |
3979877e | 1102 | file->f_pos,tmp_buf)); |
1da177e4 LT |
1103 | cifs_save_resume_key(current_entry,cifsFile); |
1104 | break; | |
1105 | } else | |
5bafd765 SF |
1106 | current_entry = |
1107 | nxt_dir_entry(current_entry, end_of_smb, | |
1108 | cifsFile->srch_inf.info_level); | |
1da177e4 LT |
1109 | } |
1110 | kfree(tmp_buf); | |
1111 | break; | |
1112 | } /* end switch */ | |
1113 | ||
1114 | rddir2_exit: | |
1da177e4 LT |
1115 | FreeXid(xid); |
1116 | return rc; | |
1117 | } |