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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/readdir.c | |
3 | * | |
4 | * Directory search handling | |
6dc0f87e | 5 | * |
ad7a2926 | 6 | * Copyright (C) International Business Machines Corp., 2004, 2008 |
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 | 25 | #include <linux/stat.h> |
1da177e4 LT |
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 | ||
3979877e SF |
34 | #ifdef CONFIG_CIFS_DEBUG2 |
35 | static void dump_cifs_file_struct(struct file *file, char *label) | |
1da177e4 | 36 | { |
6dc0f87e | 37 | struct cifsFileInfo *cf; |
1da177e4 | 38 | |
4523cc30 | 39 | if (file) { |
1da177e4 | 40 | cf = file->private_data; |
4523cc30 | 41 | if (cf == NULL) { |
6dc0f87e | 42 | cFYI(1, ("empty cifs private file data")); |
1da177e4 LT |
43 | return; |
44 | } | |
ad7a2926 | 45 | if (cf->invalidHandle) |
6dc0f87e | 46 | cFYI(1, ("invalid handle")); |
ad7a2926 | 47 | if (cf->srch_inf.endOfSearch) |
6dc0f87e | 48 | cFYI(1, ("end of search")); |
ad7a2926 | 49 | if (cf->srch_inf.emptyDir) |
6dc0f87e | 50 | cFYI(1, ("empty dir")); |
1da177e4 | 51 | } |
3979877e | 52 | } |
90c81e0b SF |
53 | #else |
54 | static inline void dump_cifs_file_struct(struct file *file, char *label) | |
55 | { | |
56 | } | |
3979877e | 57 | #endif /* DEBUG2 */ |
1da177e4 | 58 | |
132ac7b7 | 59 | /* Returns 1 if new inode created, 2 if both dentry and inode were */ |
1da177e4 | 60 | /* Might check in the future if inode number changed so we can rehash inode */ |
132ac7b7 JL |
61 | static int |
62 | construct_dentry(struct qstr *qstring, struct file *file, | |
63 | struct inode **ptmp_inode, struct dentry **pnew_dentry, | |
950ec528 | 64 | __u64 *inum) |
1da177e4 | 65 | { |
132ac7b7 JL |
66 | struct dentry *tmp_dentry = NULL; |
67 | struct super_block *sb = file->f_path.dentry->d_sb; | |
1da177e4 LT |
68 | int rc = 0; |
69 | ||
966ca923 | 70 | cFYI(1, ("For %s", qstring->name)); |
1da177e4 LT |
71 | |
72 | qstring->hash = full_name_hash(qstring->name, qstring->len); | |
e6a00296 | 73 | tmp_dentry = d_lookup(file->f_path.dentry, qstring); |
1da177e4 | 74 | if (tmp_dentry) { |
132ac7b7 JL |
75 | /* BB: overwrite old name? i.e. tmp_dentry->d_name and |
76 | * tmp_dentry->d_name.len?? | |
77 | */ | |
6dc0f87e SF |
78 | cFYI(0, ("existing dentry with inode 0x%p", |
79 | tmp_dentry->d_inode)); | |
1da177e4 | 80 | *ptmp_inode = tmp_dentry->d_inode; |
4523cc30 | 81 | if (*ptmp_inode == NULL) { |
132ac7b7 | 82 | *ptmp_inode = cifs_new_inode(sb, inum); |
4523cc30 | 83 | if (*ptmp_inode == NULL) |
1da177e4 LT |
84 | return rc; |
85 | rc = 1; | |
1da177e4 LT |
86 | } |
87 | } else { | |
e6a00296 | 88 | tmp_dentry = d_alloc(file->f_path.dentry, qstring); |
4523cc30 | 89 | if (tmp_dentry == NULL) { |
6dc0f87e | 90 | cERROR(1, ("Failed allocating dentry")); |
1da177e4 LT |
91 | *ptmp_inode = NULL; |
92 | return rc; | |
93 | } | |
94 | ||
132ac7b7 | 95 | if (CIFS_SB(sb)->tcon->nocase) |
b92327fe SF |
96 | tmp_dentry->d_op = &cifs_ci_dentry_ops; |
97 | else | |
98 | tmp_dentry->d_op = &cifs_dentry_ops; | |
132ac7b7 JL |
99 | |
100 | *ptmp_inode = cifs_new_inode(sb, inum); | |
4523cc30 | 101 | if (*ptmp_inode == NULL) |
1da177e4 | 102 | return rc; |
b835bebe | 103 | rc = 2; |
1da177e4 LT |
104 | } |
105 | ||
106 | tmp_dentry->d_time = jiffies; | |
107 | *pnew_dentry = tmp_dentry; | |
108 | return rc; | |
109 | } | |
110 | ||
790fe579 | 111 | static void AdjustForTZ(struct cifsTconInfo *tcon, struct inode *inode) |
533f90af | 112 | { |
4523cc30 | 113 | if ((tcon) && (tcon->ses) && (tcon->ses->server)) { |
ddae957d SF |
114 | inode->i_ctime.tv_sec += tcon->ses->server->timeAdj; |
115 | inode->i_mtime.tv_sec += tcon->ses->server->timeAdj; | |
116 | inode->i_atime.tv_sec += tcon->ses->server->timeAdj; | |
533f90af SF |
117 | } |
118 | return; | |
119 | } | |
120 | ||
121 | ||
5bafd765 | 122 | static void fill_in_inode(struct inode *tmp_inode, int new_buf_type, |
2c2130e1 | 123 | char *buf, unsigned int *pobject_type, int isNewInode) |
1da177e4 | 124 | { |
966ca923 SF |
125 | loff_t local_size; |
126 | struct timespec local_mtime; | |
127 | ||
1da177e4 LT |
128 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
129 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
5bafd765 SF |
130 | __u32 attr; |
131 | __u64 allocation_size; | |
132 | __u64 end_of_file; | |
4468eb3f | 133 | umode_t default_mode; |
1da177e4 | 134 | |
966ca923 SF |
135 | /* save mtime and size */ |
136 | local_mtime = tmp_inode->i_mtime; | |
137 | local_size = tmp_inode->i_size; | |
138 | ||
4523cc30 | 139 | if (new_buf_type) { |
5bafd765 SF |
140 | FILE_DIRECTORY_INFO *pfindData = (FILE_DIRECTORY_INFO *)buf; |
141 | ||
142 | attr = le32_to_cpu(pfindData->ExtFileAttributes); | |
143 | allocation_size = le64_to_cpu(pfindData->AllocationSize); | |
144 | end_of_file = le64_to_cpu(pfindData->EndOfFile); | |
145 | tmp_inode->i_atime = | |
146 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); | |
147 | tmp_inode->i_mtime = | |
148 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime)); | |
149 | tmp_inode->i_ctime = | |
150 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime)); | |
151 | } else { /* legacy, OS2 and DOS style */ | |
1bd5bbcb | 152 | /* struct timespec ts;*/ |
ad7a2926 | 153 | FIND_FILE_STANDARD_INFO *pfindData = |
5bafd765 SF |
154 | (FIND_FILE_STANDARD_INFO *)buf; |
155 | ||
268f3be1 | 156 | tmp_inode->i_mtime = cnvrtDosUnixTm( |
1bd5bbcb | 157 | le16_to_cpu(pfindData->LastWriteDate), |
268f3be1 SF |
158 | le16_to_cpu(pfindData->LastWriteTime)); |
159 | tmp_inode->i_atime = cnvrtDosUnixTm( | |
160 | le16_to_cpu(pfindData->LastAccessDate), | |
161 | le16_to_cpu(pfindData->LastAccessTime)); | |
a850790f SF |
162 | tmp_inode->i_ctime = cnvrtDosUnixTm( |
163 | le16_to_cpu(pfindData->LastWriteDate), | |
164 | le16_to_cpu(pfindData->LastWriteTime)); | |
533f90af | 165 | AdjustForTZ(cifs_sb->tcon, tmp_inode); |
5bafd765 SF |
166 | attr = le16_to_cpu(pfindData->Attributes); |
167 | allocation_size = le32_to_cpu(pfindData->AllocationSize); | |
168 | end_of_file = le32_to_cpu(pfindData->DataSize); | |
5bafd765 SF |
169 | } |
170 | ||
1da177e4 | 171 | /* Linux can not store file creation time unfortunately so ignore it */ |
5bafd765 SF |
172 | |
173 | cifsInfo->cifsAttrs = attr; | |
a6f8de3d SF |
174 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
175 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
176 | /* get more accurate mode via ACL - so force inode refresh */ | |
177 | cifsInfo->time = 0; | |
178 | } else | |
179 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
180 | cifsInfo->time = jiffies; | |
5bafd765 | 181 | |
1da177e4 LT |
182 | /* treat dos attribute of read-only as read-only mode bit e.g. 555? */ |
183 | /* 2767 perms - indicate mandatory locking */ | |
790fe579 | 184 | /* BB fill in uid and gid here? with help from winbind? |
1da177e4 LT |
185 | or retrieve from NTFS stream extended attribute */ |
186 | if (atomic_read(&cifsInfo->inUse) == 0) { | |
187 | tmp_inode->i_uid = cifs_sb->mnt_uid; | |
188 | tmp_inode->i_gid = cifs_sb->mnt_gid; | |
4468eb3f JL |
189 | } |
190 | ||
191 | if (attr & ATTR_DIRECTORY) | |
192 | default_mode = cifs_sb->mnt_dir_mode; | |
193 | else | |
194 | default_mode = cifs_sb->mnt_file_mode; | |
195 | ||
196 | /* set initial permissions */ | |
197 | if ((atomic_read(&cifsInfo->inUse) == 0) || | |
198 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) | |
199 | tmp_inode->i_mode = default_mode; | |
200 | else { | |
201 | /* just reenable write bits if !ATTR_READONLY */ | |
202 | if ((tmp_inode->i_mode & S_IWUGO) == 0 && | |
203 | (attr & ATTR_READONLY) == 0) | |
204 | tmp_inode->i_mode |= (S_IWUGO & default_mode); | |
205 | ||
3020a1f5 | 206 | tmp_inode->i_mode &= ~S_IFMT; |
1da177e4 LT |
207 | } |
208 | ||
4468eb3f JL |
209 | /* clear write bits if ATTR_READONLY is set */ |
210 | if (attr & ATTR_READONLY) | |
211 | tmp_inode->i_mode &= ~S_IWUGO; | |
212 | ||
213 | /* set inode type */ | |
214 | if ((attr & ATTR_SYSTEM) && | |
215 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) { | |
3020a1f5 | 216 | if (end_of_file == 0) { |
3020a1f5 | 217 | tmp_inode->i_mode |= S_IFIFO; |
4468eb3f | 218 | *pobject_type = DT_FIFO; |
3020a1f5 | 219 | } else { |
4468eb3f JL |
220 | /* |
221 | * trying to get the type can be slow, so just call | |
222 | * this a regular file for now, and mark for reval | |
223 | */ | |
790fe579 | 224 | tmp_inode->i_mode |= S_IFREG; |
4468eb3f | 225 | *pobject_type = DT_REG; |
790fe579 | 226 | cifsInfo->time = 0; |
3020a1f5 | 227 | } |
1da177e4 | 228 | } else { |
4468eb3f JL |
229 | if (attr & ATTR_DIRECTORY) { |
230 | tmp_inode->i_mode |= S_IFDIR; | |
231 | *pobject_type = DT_DIR; | |
232 | } else { | |
233 | tmp_inode->i_mode |= S_IFREG; | |
234 | *pobject_type = DT_REG; | |
235 | } | |
236 | } | |
1da177e4 LT |
237 | |
238 | /* can not fill in nlink here as in qpathinfo version and Unx search */ | |
ad7a2926 | 239 | if (atomic_read(&cifsInfo->inUse) == 0) |
1da177e4 | 240 | atomic_set(&cifsInfo->inUse, 1); |
1da177e4 | 241 | |
fbec9ab9 | 242 | cifsInfo->server_eof = end_of_file; |
3677db10 | 243 | spin_lock(&tmp_inode->i_lock); |
7ba52631 | 244 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { |
790fe579 | 245 | /* can not safely change the file size here if the |
1da177e4 LT |
246 | client is writing to it due to potential races */ |
247 | i_size_write(tmp_inode, end_of_file); | |
248 | ||
249 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
250 | /* for this calculation, even though the reported blocksize is larger */ | |
251 | tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9; | |
252 | } | |
3677db10 | 253 | spin_unlock(&tmp_inode->i_lock); |
1da177e4 LT |
254 | |
255 | if (allocation_size < end_of_file) | |
256 | cFYI(1, ("May be sparse file, allocation less than file size")); | |
ba52de12 | 257 | cFYI(1, ("File Size %ld and blocks %llu", |
5515eff8 | 258 | (unsigned long)tmp_inode->i_size, |
ba52de12 | 259 | (unsigned long long)tmp_inode->i_blocks)); |
1da177e4 | 260 | if (S_ISREG(tmp_inode->i_mode)) { |
966ca923 | 261 | cFYI(1, ("File inode")); |
1da177e4 | 262 | tmp_inode->i_op = &cifs_file_inode_ops; |
4523cc30 SF |
263 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
264 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
8b94bcb9 SF |
265 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; |
266 | else | |
267 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
4523cc30 | 268 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
8b94bcb9 | 269 | tmp_inode->i_fop = &cifs_file_nobrl_ops; |
1da177e4 LT |
270 | else |
271 | tmp_inode->i_fop = &cifs_file_ops; | |
f3f6ec4b | 272 | |
4523cc30 | 273 | if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
bfa0d75a | 274 | (cifs_sb->tcon->ses->server->maxBuf < |
273d81d6 DK |
275 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
276 | tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
277 | else | |
278 | tmp_inode->i_data.a_ops = &cifs_addr_ops; | |
279 | ||
4523cc30 | 280 | if (isNewInode) |
dfb7533b SF |
281 | return; /* No sense invalidating pages for new inode |
282 | since have not started caching readahead file | |
283 | data yet */ | |
966ca923 SF |
284 | |
285 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
286 | (local_size == tmp_inode->i_size)) { | |
287 | cFYI(1, ("inode exists but unchanged")); | |
288 | } else { | |
289 | /* file may have changed on server */ | |
290 | cFYI(1, ("invalidate inode, readdir detected change")); | |
291 | invalidate_remote_inode(tmp_inode); | |
292 | } | |
1da177e4 | 293 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
966ca923 | 294 | cFYI(1, ("Directory inode")); |
1da177e4 LT |
295 | tmp_inode->i_op = &cifs_dir_inode_ops; |
296 | tmp_inode->i_fop = &cifs_dir_ops; | |
297 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
966ca923 | 298 | cFYI(1, ("Symbolic Link inode")); |
1da177e4 LT |
299 | tmp_inode->i_op = &cifs_symlink_inode_ops; |
300 | } else { | |
966ca923 | 301 | cFYI(1, ("Init special inode")); |
1da177e4 LT |
302 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
303 | tmp_inode->i_rdev); | |
304 | } | |
305 | } | |
306 | ||
307 | static void unix_fill_in_inode(struct inode *tmp_inode, | |
2c2130e1 | 308 | FILE_UNIX_INFO *pfindData, unsigned int *pobject_type, int isNewInode) |
1da177e4 | 309 | { |
966ca923 SF |
310 | loff_t local_size; |
311 | struct timespec local_mtime; | |
312 | ||
1da177e4 LT |
313 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
314 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
315 | ||
316 | __u32 type = le32_to_cpu(pfindData->Type); | |
317 | __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes); | |
318 | __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile); | |
319 | cifsInfo->time = jiffies; | |
320 | atomic_inc(&cifsInfo->inUse); | |
321 | ||
966ca923 SF |
322 | /* save mtime and size */ |
323 | local_mtime = tmp_inode->i_mtime; | |
324 | local_size = tmp_inode->i_size; | |
325 | ||
1da177e4 LT |
326 | tmp_inode->i_atime = |
327 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); | |
328 | tmp_inode->i_mtime = | |
329 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime)); | |
330 | tmp_inode->i_ctime = | |
331 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange)); | |
332 | ||
333 | tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions); | |
3020a1f5 | 334 | /* since we set the inode type below we need to mask off type |
790fe579 SF |
335 | to avoid strange results if bits above were corrupt */ |
336 | tmp_inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
337 | if (type == UNIX_FILE) { |
338 | *pobject_type = DT_REG; | |
339 | tmp_inode->i_mode |= S_IFREG; | |
340 | } else if (type == UNIX_SYMLINK) { | |
341 | *pobject_type = DT_LNK; | |
342 | tmp_inode->i_mode |= S_IFLNK; | |
343 | } else if (type == UNIX_DIR) { | |
344 | *pobject_type = DT_DIR; | |
345 | tmp_inode->i_mode |= S_IFDIR; | |
346 | } else if (type == UNIX_CHARDEV) { | |
347 | *pobject_type = DT_CHR; | |
348 | tmp_inode->i_mode |= S_IFCHR; | |
349 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
350 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
351 | } else if (type == UNIX_BLOCKDEV) { | |
352 | *pobject_type = DT_BLK; | |
353 | tmp_inode->i_mode |= S_IFBLK; | |
354 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
355 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
356 | } else if (type == UNIX_FIFO) { | |
357 | *pobject_type = DT_FIFO; | |
358 | tmp_inode->i_mode |= S_IFIFO; | |
359 | } else if (type == UNIX_SOCKET) { | |
360 | *pobject_type = DT_SOCK; | |
361 | tmp_inode->i_mode |= S_IFSOCK; | |
3020a1f5 SF |
362 | } else { |
363 | /* safest to just call it a file */ | |
364 | *pobject_type = DT_REG; | |
365 | tmp_inode->i_mode |= S_IFREG; | |
790fe579 | 366 | cFYI(1, ("unknown inode type %d", type)); |
1da177e4 LT |
367 | } |
368 | ||
4523cc30 SF |
369 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
370 | tmp_inode->i_uid = cifs_sb->mnt_uid; | |
371 | else | |
372 | tmp_inode->i_uid = le64_to_cpu(pfindData->Uid); | |
373 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) | |
374 | tmp_inode->i_gid = cifs_sb->mnt_gid; | |
375 | else | |
376 | tmp_inode->i_gid = le64_to_cpu(pfindData->Gid); | |
1da177e4 LT |
377 | tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks); |
378 | ||
fbec9ab9 | 379 | cifsInfo->server_eof = end_of_file; |
3677db10 | 380 | spin_lock(&tmp_inode->i_lock); |
7ba52631 | 381 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { |
790fe579 | 382 | /* can not safely change the file size here if the |
1da177e4 | 383 | client is writing to it due to potential races */ |
7ba52631 | 384 | i_size_write(tmp_inode, end_of_file); |
1da177e4 LT |
385 | |
386 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
387 | /* for this calculation, not the real blocksize */ | |
388 | tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; | |
389 | } | |
3677db10 | 390 | spin_unlock(&tmp_inode->i_lock); |
1da177e4 LT |
391 | |
392 | if (S_ISREG(tmp_inode->i_mode)) { | |
393 | cFYI(1, ("File inode")); | |
394 | tmp_inode->i_op = &cifs_file_inode_ops; | |
f3f6ec4b | 395 | |
4523cc30 SF |
396 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
397 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
f3f6ec4b SF |
398 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; |
399 | else | |
400 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
4523cc30 | 401 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
f3f6ec4b | 402 | tmp_inode->i_fop = &cifs_file_nobrl_ops; |
1da177e4 LT |
403 | else |
404 | tmp_inode->i_fop = &cifs_file_ops; | |
f3f6ec4b | 405 | |
4523cc30 | 406 | if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
790fe579 | 407 | (cifs_sb->tcon->ses->server->maxBuf < |
273d81d6 DK |
408 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
409 | tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
410 | else | |
411 | tmp_inode->i_data.a_ops = &cifs_addr_ops; | |
966ca923 | 412 | |
4523cc30 | 413 | if (isNewInode) |
790fe579 SF |
414 | return; /* No sense invalidating pages for new inode |
415 | since we have not started caching readahead | |
416 | file data for it yet */ | |
966ca923 SF |
417 | |
418 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
419 | (local_size == tmp_inode->i_size)) { | |
420 | cFYI(1, ("inode exists but unchanged")); | |
421 | } else { | |
422 | /* file may have changed on server */ | |
423 | cFYI(1, ("invalidate inode, readdir detected change")); | |
424 | invalidate_remote_inode(tmp_inode); | |
425 | } | |
1da177e4 LT |
426 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
427 | cFYI(1, ("Directory inode")); | |
428 | tmp_inode->i_op = &cifs_dir_inode_ops; | |
429 | tmp_inode->i_fop = &cifs_dir_ops; | |
430 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
431 | cFYI(1, ("Symbolic Link inode")); | |
432 | tmp_inode->i_op = &cifs_symlink_inode_ops; | |
433 | /* tmp_inode->i_fop = *//* do not need to set to anything */ | |
434 | } else { | |
790fe579 | 435 | cFYI(1, ("Special inode")); |
1da177e4 LT |
436 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
437 | tmp_inode->i_rdev); | |
438 | } | |
439 | } | |
440 | ||
441 | static int initiate_cifs_search(const int xid, struct file *file) | |
442 | { | |
443 | int rc = 0; | |
3870253e SF |
444 | char *full_path; |
445 | struct cifsFileInfo *cifsFile; | |
1da177e4 LT |
446 | struct cifs_sb_info *cifs_sb; |
447 | struct cifsTconInfo *pTcon; | |
448 | ||
4523cc30 | 449 | if (file->private_data == NULL) { |
3870253e SF |
450 | file->private_data = |
451 | kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); | |
1da177e4 LT |
452 | } |
453 | ||
4523cc30 | 454 | if (file->private_data == NULL) |
1da177e4 | 455 | return -ENOMEM; |
1da177e4 | 456 | cifsFile = file->private_data; |
4b18f2a9 SF |
457 | cifsFile->invalidHandle = true; |
458 | cifsFile->srch_inf.endOfSearch = false; | |
1da177e4 | 459 | |
e6a00296 | 460 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
4523cc30 | 461 | if (cifs_sb == NULL) |
1da177e4 LT |
462 | return -EINVAL; |
463 | ||
464 | pTcon = cifs_sb->tcon; | |
4523cc30 | 465 | if (pTcon == NULL) |
1da177e4 LT |
466 | return -EINVAL; |
467 | ||
e6a00296 | 468 | full_path = build_path_from_dentry(file->f_path.dentry); |
1da177e4 | 469 | |
ad7a2926 | 470 | if (full_path == NULL) |
1da177e4 | 471 | return -ENOMEM; |
1da177e4 | 472 | |
966ca923 | 473 | cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos)); |
1da177e4 | 474 | |
75cf6bdc | 475 | ffirst_retry: |
1da177e4 | 476 | /* test for Unix extensions */ |
c18c842b SF |
477 | /* but now check for them on the share/mount not on the SMB session */ |
478 | /* if (pTcon->ses->capabilities & CAP_UNIX) { */ | |
ad7a2926 | 479 | if (pTcon->unix_ext) |
5bafd765 | 480 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX; |
ad7a2926 | 481 | else if ((pTcon->ses->capabilities & |
5bafd765 SF |
482 | (CAP_NT_SMBS | CAP_NT_FIND)) == 0) { |
483 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD; | |
1da177e4 LT |
484 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
485 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; | |
486 | } else /* not srvinos - BB fixme add check for backlevel? */ { | |
487 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
488 | } | |
489 | ||
3870253e | 490 | rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls, |
737b758c | 491 | &cifsFile->netfid, &cifsFile->srch_inf, |
3870253e | 492 | cifs_sb->mnt_cifs_flags & |
eafe8701 | 493 | CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); |
4523cc30 | 494 | if (rc == 0) |
4b18f2a9 | 495 | cifsFile->invalidHandle = false; |
3870253e | 496 | if ((rc == -EOPNOTSUPP) && |
75cf6bdc SF |
497 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
498 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; | |
499 | goto ffirst_retry; | |
500 | } | |
1da177e4 LT |
501 | kfree(full_path); |
502 | return rc; | |
503 | } | |
504 | ||
505 | /* return length of unicode string in bytes */ | |
506 | static int cifs_unicode_bytelen(char *str) | |
507 | { | |
508 | int len; | |
63d2583f | 509 | __le16 *ustr = (__le16 *)str; |
1da177e4 | 510 | |
3870253e | 511 | for (len = 0; len <= PATH_MAX; len++) { |
4523cc30 | 512 | if (ustr[len] == 0) |
1da177e4 LT |
513 | return len << 1; |
514 | } | |
790fe579 | 515 | cFYI(1, ("Unicode string longer than PATH_MAX found")); |
1da177e4 LT |
516 | return len << 1; |
517 | } | |
518 | ||
5bafd765 | 519 | static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level) |
1da177e4 | 520 | { |
3870253e | 521 | char *new_entry; |
ad7a2926 | 522 | FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry; |
1da177e4 | 523 | |
4523cc30 | 524 | if (level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 525 | FIND_FILE_STANDARD_INFO *pfData; |
5bafd765 SF |
526 | pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo; |
527 | ||
528 | new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) + | |
529 | pfData->FileNameLength; | |
530 | } else | |
531 | new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset); | |
790fe579 | 532 | cFYI(1, ("new entry %p old entry %p", new_entry, old_entry)); |
1da177e4 | 533 | /* validate that new_entry is not past end of SMB */ |
4523cc30 | 534 | if (new_entry >= end_of_smb) { |
09d1db5c SF |
535 | cERROR(1, |
536 | ("search entry %p began after end of SMB %p old entry %p", | |
3870253e | 537 | new_entry, end_of_smb, old_entry)); |
1da177e4 | 538 | return NULL; |
4523cc30 | 539 | } else if (((level == SMB_FIND_FILE_INFO_STANDARD) && |
3870253e SF |
540 | (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) |
541 | || ((level != SMB_FIND_FILE_INFO_STANDARD) && | |
5bafd765 | 542 | (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) { |
3870253e | 543 | cERROR(1, ("search entry %p extends after end of SMB %p", |
09d1db5c SF |
544 | new_entry, end_of_smb)); |
545 | return NULL; | |
3870253e | 546 | } else |
1da177e4 LT |
547 | return new_entry; |
548 | ||
549 | } | |
550 | ||
551 | #define UNICODE_DOT cpu_to_le16(0x2e) | |
552 | ||
553 | /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */ | |
554 | static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile) | |
555 | { | |
556 | int rc = 0; | |
3870253e SF |
557 | char *filename = NULL; |
558 | int len = 0; | |
1da177e4 | 559 | |
4523cc30 | 560 | if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) { |
ad7a2926 | 561 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; |
1da177e4 | 562 | filename = &pFindData->FileName[0]; |
4523cc30 | 563 | if (cfile->srch_inf.unicode) { |
1da177e4 LT |
564 | len = cifs_unicode_bytelen(filename); |
565 | } else { | |
566 | /* BB should we make this strnlen of PATH_MAX? */ | |
567 | len = strnlen(filename, 5); | |
568 | } | |
4523cc30 | 569 | } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) { |
ad7a2926 | 570 | FILE_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
571 | (FILE_DIRECTORY_INFO *)current_entry; |
572 | filename = &pFindData->FileName[0]; | |
573 | len = le32_to_cpu(pFindData->FileNameLength); | |
3870253e | 574 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 575 | SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
ad7a2926 | 576 | FILE_FULL_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
577 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
578 | filename = &pFindData->FileName[0]; | |
579 | len = le32_to_cpu(pFindData->FileNameLength); | |
4523cc30 | 580 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 581 | SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
ad7a2926 | 582 | SEARCH_ID_FULL_DIR_INFO *pFindData = |
1da177e4 LT |
583 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
584 | filename = &pFindData->FileName[0]; | |
585 | len = le32_to_cpu(pFindData->FileNameLength); | |
3870253e | 586 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 587 | SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
ad7a2926 | 588 | FILE_BOTH_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
589 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
590 | filename = &pFindData->FileName[0]; | |
591 | len = le32_to_cpu(pFindData->FileNameLength); | |
4523cc30 | 592 | } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 593 | FIND_FILE_STANDARD_INFO *pFindData = |
5bafd765 SF |
594 | (FIND_FILE_STANDARD_INFO *)current_entry; |
595 | filename = &pFindData->FileName[0]; | |
5ddaa683 | 596 | len = pFindData->FileNameLength; |
1da177e4 | 597 | } else { |
790fe579 SF |
598 | cFYI(1, ("Unknown findfirst level %d", |
599 | cfile->srch_inf.info_level)); | |
1da177e4 LT |
600 | } |
601 | ||
4523cc30 SF |
602 | if (filename) { |
603 | if (cfile->srch_inf.unicode) { | |
1da177e4 | 604 | __le16 *ufilename = (__le16 *)filename; |
4523cc30 | 605 | if (len == 2) { |
1da177e4 | 606 | /* check for . */ |
4523cc30 | 607 | if (ufilename[0] == UNICODE_DOT) |
1da177e4 | 608 | rc = 1; |
4523cc30 | 609 | } else if (len == 4) { |
1da177e4 | 610 | /* check for .. */ |
4523cc30 | 611 | if ((ufilename[0] == UNICODE_DOT) |
3870253e | 612 | && (ufilename[1] == UNICODE_DOT)) |
1da177e4 LT |
613 | rc = 2; |
614 | } | |
615 | } else /* ASCII */ { | |
4523cc30 | 616 | if (len == 1) { |
3870253e | 617 | if (filename[0] == '.') |
1da177e4 | 618 | rc = 1; |
4523cc30 | 619 | } else if (len == 2) { |
790fe579 | 620 | if ((filename[0] == '.') && (filename[1] == '.')) |
1da177e4 LT |
621 | rc = 2; |
622 | } | |
623 | } | |
624 | } | |
625 | ||
626 | return rc; | |
627 | } | |
628 | ||
eafe8701 SF |
629 | /* Check if directory that we are searching has changed so we can decide |
630 | whether we can use the cached search results from the previous search */ | |
3870253e | 631 | static int is_dir_changed(struct file *file) |
eafe8701 | 632 | { |
c33f8d32 CH |
633 | struct inode *inode = file->f_path.dentry->d_inode; |
634 | struct cifsInodeInfo *cifsInfo = CIFS_I(inode); | |
eafe8701 | 635 | |
c33f8d32 | 636 | if (cifsInfo->time == 0) |
eafe8701 SF |
637 | return 1; /* directory was changed, perhaps due to unlink */ |
638 | else | |
639 | return 0; | |
640 | ||
641 | } | |
642 | ||
0752f152 SF |
643 | static int cifs_save_resume_key(const char *current_entry, |
644 | struct cifsFileInfo *cifsFile) | |
645 | { | |
646 | int rc = 0; | |
647 | unsigned int len = 0; | |
648 | __u16 level; | |
649 | char *filename; | |
650 | ||
651 | if ((cifsFile == NULL) || (current_entry == NULL)) | |
652 | return -EINVAL; | |
653 | ||
654 | level = cifsFile->srch_inf.info_level; | |
655 | ||
656 | if (level == SMB_FIND_FILE_UNIX) { | |
657 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; | |
658 | ||
659 | filename = &pFindData->FileName[0]; | |
660 | if (cifsFile->srch_inf.unicode) { | |
661 | len = cifs_unicode_bytelen(filename); | |
662 | } else { | |
663 | /* BB should we make this strnlen of PATH_MAX? */ | |
664 | len = strnlen(filename, PATH_MAX); | |
665 | } | |
666 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; | |
667 | } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) { | |
668 | FILE_DIRECTORY_INFO *pFindData = | |
669 | (FILE_DIRECTORY_INFO *)current_entry; | |
670 | filename = &pFindData->FileName[0]; | |
671 | len = le32_to_cpu(pFindData->FileNameLength); | |
672 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
673 | } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { | |
674 | FILE_FULL_DIRECTORY_INFO *pFindData = | |
675 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
676 | filename = &pFindData->FileName[0]; | |
677 | len = le32_to_cpu(pFindData->FileNameLength); | |
678 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
679 | } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { | |
680 | SEARCH_ID_FULL_DIR_INFO *pFindData = | |
681 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
682 | filename = &pFindData->FileName[0]; | |
683 | len = le32_to_cpu(pFindData->FileNameLength); | |
684 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
685 | } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { | |
686 | FILE_BOTH_DIRECTORY_INFO *pFindData = | |
687 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
688 | filename = &pFindData->FileName[0]; | |
689 | len = le32_to_cpu(pFindData->FileNameLength); | |
690 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
691 | } else if (level == SMB_FIND_FILE_INFO_STANDARD) { | |
692 | FIND_FILE_STANDARD_INFO *pFindData = | |
693 | (FIND_FILE_STANDARD_INFO *)current_entry; | |
694 | filename = &pFindData->FileName[0]; | |
695 | /* one byte length, no name conversion */ | |
696 | len = (unsigned int)pFindData->FileNameLength; | |
697 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; | |
698 | } else { | |
699 | cFYI(1, ("Unknown findfirst level %d", level)); | |
700 | return -EINVAL; | |
701 | } | |
702 | cifsFile->srch_inf.resume_name_len = len; | |
703 | cifsFile->srch_inf.presume_name = filename; | |
704 | return rc; | |
705 | } | |
706 | ||
1da177e4 LT |
707 | /* find the corresponding entry in the search */ |
708 | /* Note that the SMB server returns search entries for . and .. which | |
709 | complicates logic here if we choose to parse for them and we do not | |
710 | assume that they are located in the findfirst return buffer.*/ | |
711 | /* We start counting in the buffer with entry 2 and increment for every | |
712 | entry (do not increment for . or .. entry) */ | |
713 | static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon, | |
3870253e | 714 | struct file *file, char **ppCurrentEntry, int *num_to_ret) |
1da177e4 LT |
715 | { |
716 | int rc = 0; | |
717 | int pos_in_buf = 0; | |
718 | loff_t first_entry_in_buffer; | |
719 | loff_t index_to_find = file->f_pos; | |
3870253e | 720 | struct cifsFileInfo *cifsFile = file->private_data; |
1da177e4 | 721 | /* check if index in the buffer */ |
50c2f753 | 722 | |
3870253e | 723 | if ((cifsFile == NULL) || (ppCurrentEntry == NULL) || |
eafe8701 | 724 | (num_to_ret == NULL)) |
1da177e4 | 725 | return -ENOENT; |
50c2f753 | 726 | |
1da177e4 | 727 | *ppCurrentEntry = NULL; |
3870253e SF |
728 | first_entry_in_buffer = |
729 | cifsFile->srch_inf.index_of_last_entry - | |
1da177e4 | 730 | cifsFile->srch_inf.entries_in_buffer; |
60808233 SF |
731 | |
732 | /* if first entry in buf is zero then is first buffer | |
733 | in search response data which means it is likely . and .. | |
734 | will be in this buffer, although some servers do not return | |
735 | . and .. for the root of a drive and for those we need | |
736 | to start two entries earlier */ | |
737 | ||
3979877e | 738 | dump_cifs_file_struct(file, "In fce "); |
3870253e SF |
739 | if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) && |
740 | is_dir_changed(file)) || | |
eafe8701 | 741 | (index_to_find < first_entry_in_buffer)) { |
1da177e4 | 742 | /* close and restart search */ |
790fe579 | 743 | cFYI(1, ("search backing up - close and restart search")); |
ddb4cbfc | 744 | write_lock(&GlobalSMBSeslock); |
77c57ec8 SF |
745 | if (!cifsFile->srch_inf.endOfSearch && |
746 | !cifsFile->invalidHandle) { | |
747 | cifsFile->invalidHandle = true; | |
ddb4cbfc | 748 | write_unlock(&GlobalSMBSeslock); |
77c57ec8 | 749 | CIFSFindClose(xid, pTcon, cifsFile->netfid); |
ddb4cbfc SF |
750 | } else |
751 | write_unlock(&GlobalSMBSeslock); | |
4523cc30 | 752 | if (cifsFile->srch_inf.ntwrk_buf_start) { |
790fe579 | 753 | cFYI(1, ("freeing SMB ff cache buf on search rewind")); |
4523cc30 | 754 | if (cifsFile->srch_inf.smallBuf) |
d47d7c1a SF |
755 | cifs_small_buf_release(cifsFile->srch_inf. |
756 | ntwrk_buf_start); | |
757 | else | |
758 | cifs_buf_release(cifsFile->srch_inf. | |
759 | ntwrk_buf_start); | |
76c510ad | 760 | cifsFile->srch_inf.ntwrk_buf_start = NULL; |
1da177e4 | 761 | } |
3870253e | 762 | rc = initiate_cifs_search(xid, file); |
4523cc30 | 763 | if (rc) { |
790fe579 SF |
764 | cFYI(1, ("error %d reinitiating a search on rewind", |
765 | rc)); | |
1da177e4 LT |
766 | return rc; |
767 | } | |
a364bc0b | 768 | cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile); |
1da177e4 LT |
769 | } |
770 | ||
3870253e | 771 | while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) && |
4b18f2a9 | 772 | (rc == 0) && !cifsFile->srch_inf.endOfSearch) { |
790fe579 | 773 | cFYI(1, ("calling findnext2")); |
3870253e | 774 | rc = CIFSFindNext(xid, pTcon, cifsFile->netfid, |
dfb7533b | 775 | &cifsFile->srch_inf); |
a364bc0b | 776 | cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile); |
4523cc30 | 777 | if (rc) |
1da177e4 LT |
778 | return -ENOENT; |
779 | } | |
4523cc30 | 780 | if (index_to_find < cifsFile->srch_inf.index_of_last_entry) { |
1da177e4 LT |
781 | /* we found the buffer that contains the entry */ |
782 | /* scan and find it */ | |
783 | int i; | |
3870253e SF |
784 | char *current_entry; |
785 | char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + | |
1da177e4 LT |
786 | smbCalcSize((struct smb_hdr *) |
787 | cifsFile->srch_inf.ntwrk_buf_start); | |
60808233 SF |
788 | |
789 | current_entry = cifsFile->srch_inf.srch_entries_start; | |
1da177e4 LT |
790 | first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry |
791 | - cifsFile->srch_inf.entries_in_buffer; | |
792 | pos_in_buf = index_to_find - first_entry_in_buffer; | |
790fe579 | 793 | cFYI(1, ("found entry - pos_in_buf %d", pos_in_buf)); |
5bafd765 | 794 | |
ad7a2926 | 795 | for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) { |
dfb7533b | 796 | /* go entry by entry figuring out which is first */ |
3870253e | 797 | current_entry = nxt_dir_entry(current_entry, end_of_smb, |
5bafd765 | 798 | cifsFile->srch_inf.info_level); |
1da177e4 | 799 | } |
790fe579 | 800 | if ((current_entry == NULL) && (i < pos_in_buf)) { |
1da177e4 | 801 | /* BB fixme - check if we should flag this error */ |
3870253e | 802 | cERROR(1, ("reached end of buf searching for pos in buf" |
1da177e4 | 803 | " %d index to find %lld rc %d", |
3870253e | 804 | pos_in_buf, index_to_find, rc)); |
1da177e4 LT |
805 | } |
806 | rc = 0; | |
807 | *ppCurrentEntry = current_entry; | |
808 | } else { | |
790fe579 | 809 | cFYI(1, ("index not in buffer - could not findnext into it")); |
1da177e4 LT |
810 | return 0; |
811 | } | |
812 | ||
790fe579 SF |
813 | if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) { |
814 | cFYI(1, ("can not return entries pos_in_buf beyond last")); | |
1da177e4 LT |
815 | *num_to_ret = 0; |
816 | } else | |
817 | *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf; | |
1da177e4 LT |
818 | |
819 | return rc; | |
820 | } | |
821 | ||
822 | /* inode num, inode type and filename returned */ | |
823 | static int cifs_get_name_from_search_buf(struct qstr *pqst, | |
824 | char *current_entry, __u16 level, unsigned int unicode, | |
950ec528 | 825 | struct cifs_sb_info *cifs_sb, int max_len, __u64 *pinum) |
1da177e4 LT |
826 | { |
827 | int rc = 0; | |
828 | unsigned int len = 0; | |
3870253e SF |
829 | char *filename; |
830 | struct nls_table *nlt = cifs_sb->local_nls; | |
1da177e4 LT |
831 | |
832 | *pinum = 0; | |
833 | ||
790fe579 | 834 | if (level == SMB_FIND_FILE_UNIX) { |
3870253e | 835 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; |
1da177e4 LT |
836 | |
837 | filename = &pFindData->FileName[0]; | |
790fe579 | 838 | if (unicode) { |
1da177e4 LT |
839 | len = cifs_unicode_bytelen(filename); |
840 | } else { | |
841 | /* BB should we make this strnlen of PATH_MAX? */ | |
842 | len = strnlen(filename, PATH_MAX); | |
843 | } | |
844 | ||
85a6dac5 | 845 | *pinum = le64_to_cpu(pFindData->UniqueId); |
790fe579 | 846 | } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) { |
3870253e | 847 | FILE_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
848 | (FILE_DIRECTORY_INFO *)current_entry; |
849 | filename = &pFindData->FileName[0]; | |
850 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 851 | } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
3870253e | 852 | FILE_FULL_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
853 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
854 | filename = &pFindData->FileName[0]; | |
855 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 856 | } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
3870253e | 857 | SEARCH_ID_FULL_DIR_INFO *pFindData = |
1da177e4 LT |
858 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
859 | filename = &pFindData->FileName[0]; | |
860 | len = le32_to_cpu(pFindData->FileNameLength); | |
85a6dac5 | 861 | *pinum = le64_to_cpu(pFindData->UniqueId); |
790fe579 | 862 | } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
3870253e | 863 | FILE_BOTH_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
864 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
865 | filename = &pFindData->FileName[0]; | |
866 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 867 | } else if (level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 868 | FIND_FILE_STANDARD_INFO *pFindData = |
5bafd765 SF |
869 | (FIND_FILE_STANDARD_INFO *)current_entry; |
870 | filename = &pFindData->FileName[0]; | |
871 | /* one byte length, no name conversion */ | |
872 | len = (unsigned int)pFindData->FileNameLength; | |
1da177e4 | 873 | } else { |
790fe579 | 874 | cFYI(1, ("Unknown findfirst level %d", level)); |
1da177e4 LT |
875 | return -EINVAL; |
876 | } | |
5bafd765 | 877 | |
790fe579 | 878 | if (len > max_len) { |
3870253e | 879 | cERROR(1, ("bad search response length %d past smb end", len)); |
5bafd765 SF |
880 | return -EINVAL; |
881 | } | |
882 | ||
790fe579 | 883 | if (unicode) { |
1da177e4 LT |
884 | /* BB fixme - test with long names */ |
885 | /* Note converted filename can be longer than in unicode */ | |
790fe579 | 886 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) |
6a0b4824 SF |
887 | pqst->len = cifs_convertUCSpath((char *)pqst->name, |
888 | (__le16 *)filename, len/2, nlt); | |
889 | else | |
6a0b4824 | 890 | pqst->len = cifs_strfromUCS_le((char *)pqst->name, |
3870253e | 891 | (__le16 *)filename, len/2, nlt); |
1da177e4 LT |
892 | } else { |
893 | pqst->name = filename; | |
894 | pqst->len = len; | |
895 | } | |
3870253e | 896 | pqst->hash = full_name_hash(pqst->name, pqst->len); |
790fe579 | 897 | /* cFYI(1, ("filldir on %s",pqst->name)); */ |
1da177e4 LT |
898 | return rc; |
899 | } | |
900 | ||
901 | static int cifs_filldir(char *pfindEntry, struct file *file, | |
5bafd765 | 902 | filldir_t filldir, void *direntry, char *scratch_buf, int max_len) |
1da177e4 LT |
903 | { |
904 | int rc = 0; | |
905 | struct qstr qstring; | |
3870253e | 906 | struct cifsFileInfo *pCifsF; |
2c2130e1 | 907 | unsigned int obj_type; |
950ec528 | 908 | __u64 inum; |
3870253e | 909 | struct cifs_sb_info *cifs_sb; |
1da177e4 LT |
910 | struct inode *tmp_inode; |
911 | struct dentry *tmp_dentry; | |
912 | ||
913 | /* get filename and len into qstring */ | |
914 | /* get dentry */ | |
915 | /* decide whether to create and populate ionde */ | |
790fe579 | 916 | if ((direntry == NULL) || (file == NULL)) |
1da177e4 LT |
917 | return -EINVAL; |
918 | ||
919 | pCifsF = file->private_data; | |
50c2f753 | 920 | |
790fe579 | 921 | if ((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL)) |
1da177e4 LT |
922 | return -ENOENT; |
923 | ||
3870253e | 924 | rc = cifs_entry_is_dot(pfindEntry, pCifsF); |
60808233 | 925 | /* skip . and .. since we added them first */ |
790fe579 | 926 | if (rc != 0) |
60808233 SF |
927 | return 0; |
928 | ||
e6a00296 | 929 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 LT |
930 | |
931 | qstring.name = scratch_buf; | |
3870253e | 932 | rc = cifs_get_name_from_search_buf(&qstring, pfindEntry, |
1da177e4 | 933 | pCifsF->srch_inf.info_level, |
3870253e | 934 | pCifsF->srch_inf.unicode, cifs_sb, |
5bafd765 | 935 | max_len, |
1da177e4 LT |
936 | &inum /* returned */); |
937 | ||
790fe579 | 938 | if (rc) |
1da177e4 LT |
939 | return rc; |
940 | ||
132ac7b7 JL |
941 | /* only these two infolevels return valid inode numbers */ |
942 | if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX || | |
943 | pCifsF->srch_inf.info_level == SMB_FIND_FILE_ID_FULL_DIR_INFO) | |
944 | rc = construct_dentry(&qstring, file, &tmp_inode, &tmp_dentry, | |
945 | &inum); | |
946 | else | |
947 | rc = construct_dentry(&qstring, file, &tmp_inode, &tmp_dentry, | |
948 | NULL); | |
949 | ||
790fe579 | 950 | if ((tmp_inode == NULL) || (tmp_dentry == NULL)) |
1da177e4 LT |
951 | return -ENOMEM; |
952 | ||
966ca923 SF |
953 | /* we pass in rc below, indicating whether it is a new inode, |
954 | so we can figure out whether to invalidate the inode cached | |
955 | data if the file has changed */ | |
790fe579 | 956 | if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) |
966ca923 | 957 | unix_fill_in_inode(tmp_inode, |
5bafd765 SF |
958 | (FILE_UNIX_INFO *)pfindEntry, |
959 | &obj_type, rc); | |
790fe579 | 960 | else if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) |
5bafd765 SF |
961 | fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */, |
962 | pfindEntry, &obj_type, rc); | |
963 | else | |
964 | fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc); | |
b835bebe | 965 | |
790fe579 | 966 | if (rc) /* new inode - needs to be tied to dentry */ { |
b835bebe | 967 | d_instantiate(tmp_dentry, tmp_inode); |
790fe579 | 968 | if (rc == 2) |
b835bebe SF |
969 | d_rehash(tmp_dentry); |
970 | } | |
50c2f753 | 971 | |
3870253e SF |
972 | |
973 | rc = filldir(direntry, qstring.name, qstring.len, file->f_pos, | |
974 | tmp_inode->i_ino, obj_type); | |
790fe579 SF |
975 | if (rc) { |
976 | cFYI(1, ("filldir rc = %d", rc)); | |
7ca85ba7 SF |
977 | /* we can not return filldir errors to the caller |
978 | since they are "normal" when the stat blocksize | |
979 | is too small - we return remapped error instead */ | |
980 | rc = -EOVERFLOW; | |
1da177e4 LT |
981 | } |
982 | ||
983 | dput(tmp_dentry); | |
984 | return rc; | |
985 | } | |
986 | ||
1da177e4 LT |
987 | |
988 | int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) | |
989 | { | |
990 | int rc = 0; | |
3870253e | 991 | int xid, i; |
1da177e4 LT |
992 | struct cifs_sb_info *cifs_sb; |
993 | struct cifsTconInfo *pTcon; | |
994 | struct cifsFileInfo *cifsFile = NULL; | |
3870253e | 995 | char *current_entry; |
1da177e4 | 996 | int num_to_fill = 0; |
3870253e | 997 | char *tmp_buf = NULL; |
50c2f753 | 998 | char *end_of_smb; |
5bafd765 | 999 | int max_len; |
1da177e4 LT |
1000 | |
1001 | xid = GetXid(); | |
1002 | ||
e6a00296 | 1003 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 | 1004 | pTcon = cifs_sb->tcon; |
790fe579 | 1005 | if (pTcon == NULL) |
1da177e4 LT |
1006 | return -EINVAL; |
1007 | ||
1da177e4 LT |
1008 | switch ((int) file->f_pos) { |
1009 | case 0: | |
60808233 | 1010 | if (filldir(direntry, ".", 1, file->f_pos, |
e6a00296 | 1011 | file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) { |
60808233 | 1012 | cERROR(1, ("Filldir for current dir failed")); |
1da177e4 LT |
1013 | rc = -ENOMEM; |
1014 | break; | |
1015 | } | |
60808233 | 1016 | file->f_pos++; |
1da177e4 | 1017 | case 1: |
60808233 | 1018 | if (filldir(direntry, "..", 2, file->f_pos, |
e6a00296 | 1019 | file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) { |
26a21b98 | 1020 | cERROR(1, ("Filldir for parent dir failed")); |
1da177e4 LT |
1021 | rc = -ENOMEM; |
1022 | break; | |
1023 | } | |
60808233 SF |
1024 | file->f_pos++; |
1025 | default: | |
3870253e SF |
1026 | /* 1) If search is active, |
1027 | is in current search buffer? | |
1da177e4 LT |
1028 | if it before then restart search |
1029 | if after then keep searching till find it */ | |
1030 | ||
790fe579 | 1031 | if (file->private_data == NULL) { |
3870253e | 1032 | rc = initiate_cifs_search(xid, file); |
790fe579 SF |
1033 | cFYI(1, ("initiate cifs search rc %d", rc)); |
1034 | if (rc) { | |
1da177e4 LT |
1035 | FreeXid(xid); |
1036 | return rc; | |
1037 | } | |
1038 | } | |
790fe579 | 1039 | if (file->private_data == NULL) { |
1da177e4 LT |
1040 | rc = -EINVAL; |
1041 | FreeXid(xid); | |
1042 | return rc; | |
1043 | } | |
1044 | cifsFile = file->private_data; | |
1045 | if (cifsFile->srch_inf.endOfSearch) { | |
790fe579 | 1046 | if (cifsFile->srch_inf.emptyDir) { |
1da177e4 LT |
1047 | cFYI(1, ("End of search, empty dir")); |
1048 | rc = 0; | |
1049 | break; | |
1050 | } | |
1051 | } /* else { | |
4b18f2a9 | 1052 | cifsFile->invalidHandle = true; |
1da177e4 | 1053 | CIFSFindClose(xid, pTcon, cifsFile->netfid); |
aaa9bbe0 | 1054 | } */ |
1da177e4 | 1055 | |
3870253e SF |
1056 | rc = find_cifs_entry(xid, pTcon, file, |
1057 | ¤t_entry, &num_to_fill); | |
790fe579 SF |
1058 | if (rc) { |
1059 | cFYI(1, ("fce error %d", rc)); | |
1da177e4 LT |
1060 | goto rddir2_exit; |
1061 | } else if (current_entry != NULL) { | |
790fe579 | 1062 | cFYI(1, ("entry %lld found", file->f_pos)); |
1da177e4 | 1063 | } else { |
790fe579 | 1064 | cFYI(1, ("could not find entry")); |
1da177e4 LT |
1065 | goto rddir2_exit; |
1066 | } | |
790fe579 SF |
1067 | cFYI(1, ("loop through %d times filling dir for net buf %p", |
1068 | num_to_fill, cifsFile->srch_inf.ntwrk_buf_start)); | |
5bafd765 SF |
1069 | max_len = smbCalcSize((struct smb_hdr *) |
1070 | cifsFile->srch_inf.ntwrk_buf_start); | |
1071 | end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len; | |
1072 | ||
6a0b4824 SF |
1073 | /* To be safe - for UCS to UTF-8 with strings loaded |
1074 | with the rare long characters alloc more to account for | |
1075 | such multibyte target UTF-8 characters. cifs_unicode.c, | |
1076 | which actually does the conversion, has the same limit */ | |
7b0c8fcf | 1077 | tmp_buf = kmalloc((4 * NAME_MAX) + 2, GFP_KERNEL); |
790fe579 SF |
1078 | for (i = 0; (i < num_to_fill) && (rc == 0); i++) { |
1079 | if (current_entry == NULL) { | |
1da177e4 | 1080 | /* evaluate whether this case is an error */ |
26f57364 | 1081 | cERROR(1, ("past SMB end, num to fill %d i %d", |
1da177e4 LT |
1082 | num_to_fill, i)); |
1083 | break; | |
1084 | } | |
60808233 SF |
1085 | /* if buggy server returns . and .. late do |
1086 | we want to check for that here? */ | |
5bafd765 SF |
1087 | rc = cifs_filldir(current_entry, file, |
1088 | filldir, direntry, tmp_buf, max_len); | |
790fe579 | 1089 | if (rc == -EOVERFLOW) { |
7ca85ba7 SF |
1090 | rc = 0; |
1091 | break; | |
1092 | } | |
1093 | ||
1da177e4 | 1094 | file->f_pos++; |
790fe579 | 1095 | if (file->f_pos == |
3979877e | 1096 | cifsFile->srch_inf.index_of_last_entry) { |
790fe579 SF |
1097 | cFYI(1, ("last entry in buf at pos %lld %s", |
1098 | file->f_pos, tmp_buf)); | |
1099 | cifs_save_resume_key(current_entry, cifsFile); | |
1da177e4 | 1100 | break; |
790fe579 SF |
1101 | } else |
1102 | current_entry = | |
5bafd765 SF |
1103 | nxt_dir_entry(current_entry, end_of_smb, |
1104 | cifsFile->srch_inf.info_level); | |
1da177e4 LT |
1105 | } |
1106 | kfree(tmp_buf); | |
1107 | break; | |
1108 | } /* end switch */ | |
1109 | ||
1110 | rddir2_exit: | |
1da177e4 LT |
1111 | FreeXid(xid); |
1112 | return rc; | |
1113 | } |