Commit | Line | Data |
---|---|---|
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 | ||
f5884166 JL |
34 | /* |
35 | * To be safe - for UCS to UTF-8 with strings loaded with the rare long | |
36 | * characters alloc more to account for such multibyte target UTF-8 | |
37 | * characters. | |
38 | */ | |
39 | #define UNICODE_NAME_MAX ((4 * NAME_MAX) + 2) | |
40 | ||
3979877e SF |
41 | #ifdef CONFIG_CIFS_DEBUG2 |
42 | static void dump_cifs_file_struct(struct file *file, char *label) | |
1da177e4 | 43 | { |
6dc0f87e | 44 | struct cifsFileInfo *cf; |
1da177e4 | 45 | |
4523cc30 | 46 | if (file) { |
1da177e4 | 47 | cf = file->private_data; |
4523cc30 | 48 | if (cf == NULL) { |
6dc0f87e | 49 | cFYI(1, ("empty cifs private file data")); |
1da177e4 LT |
50 | return; |
51 | } | |
ad7a2926 | 52 | if (cf->invalidHandle) |
6dc0f87e | 53 | cFYI(1, ("invalid handle")); |
ad7a2926 | 54 | if (cf->srch_inf.endOfSearch) |
6dc0f87e | 55 | cFYI(1, ("end of search")); |
ad7a2926 | 56 | if (cf->srch_inf.emptyDir) |
6dc0f87e | 57 | cFYI(1, ("empty dir")); |
1da177e4 | 58 | } |
3979877e | 59 | } |
90c81e0b SF |
60 | #else |
61 | static inline void dump_cifs_file_struct(struct file *file, char *label) | |
62 | { | |
63 | } | |
3979877e | 64 | #endif /* DEBUG2 */ |
1da177e4 | 65 | |
132ac7b7 | 66 | /* Returns 1 if new inode created, 2 if both dentry and inode were */ |
1da177e4 | 67 | /* Might check in the future if inode number changed so we can rehash inode */ |
132ac7b7 JL |
68 | static int |
69 | construct_dentry(struct qstr *qstring, struct file *file, | |
70 | struct inode **ptmp_inode, struct dentry **pnew_dentry, | |
950ec528 | 71 | __u64 *inum) |
1da177e4 | 72 | { |
132ac7b7 JL |
73 | struct dentry *tmp_dentry = NULL; |
74 | struct super_block *sb = file->f_path.dentry->d_sb; | |
1da177e4 LT |
75 | int rc = 0; |
76 | ||
966ca923 | 77 | cFYI(1, ("For %s", qstring->name)); |
1da177e4 LT |
78 | |
79 | qstring->hash = full_name_hash(qstring->name, qstring->len); | |
e6a00296 | 80 | tmp_dentry = d_lookup(file->f_path.dentry, qstring); |
1da177e4 | 81 | if (tmp_dentry) { |
132ac7b7 JL |
82 | /* BB: overwrite old name? i.e. tmp_dentry->d_name and |
83 | * tmp_dentry->d_name.len?? | |
84 | */ | |
6dc0f87e SF |
85 | cFYI(0, ("existing dentry with inode 0x%p", |
86 | tmp_dentry->d_inode)); | |
1da177e4 | 87 | *ptmp_inode = tmp_dentry->d_inode; |
4523cc30 | 88 | if (*ptmp_inode == NULL) { |
132ac7b7 | 89 | *ptmp_inode = cifs_new_inode(sb, inum); |
4523cc30 | 90 | if (*ptmp_inode == NULL) |
1da177e4 LT |
91 | return rc; |
92 | rc = 1; | |
1da177e4 LT |
93 | } |
94 | } else { | |
e6a00296 | 95 | tmp_dentry = d_alloc(file->f_path.dentry, qstring); |
4523cc30 | 96 | if (tmp_dentry == NULL) { |
6dc0f87e | 97 | cERROR(1, ("Failed allocating dentry")); |
1da177e4 LT |
98 | *ptmp_inode = NULL; |
99 | return rc; | |
100 | } | |
101 | ||
132ac7b7 | 102 | if (CIFS_SB(sb)->tcon->nocase) |
b92327fe SF |
103 | tmp_dentry->d_op = &cifs_ci_dentry_ops; |
104 | else | |
105 | tmp_dentry->d_op = &cifs_dentry_ops; | |
132ac7b7 JL |
106 | |
107 | *ptmp_inode = cifs_new_inode(sb, inum); | |
4523cc30 | 108 | if (*ptmp_inode == NULL) |
1da177e4 | 109 | return rc; |
b835bebe | 110 | rc = 2; |
1da177e4 LT |
111 | } |
112 | ||
113 | tmp_dentry->d_time = jiffies; | |
114 | *pnew_dentry = tmp_dentry; | |
115 | return rc; | |
116 | } | |
117 | ||
5bafd765 | 118 | static void fill_in_inode(struct inode *tmp_inode, int new_buf_type, |
2c2130e1 | 119 | char *buf, unsigned int *pobject_type, int isNewInode) |
1da177e4 | 120 | { |
966ca923 SF |
121 | loff_t local_size; |
122 | struct timespec local_mtime; | |
123 | ||
1da177e4 LT |
124 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
125 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
5bafd765 SF |
126 | __u32 attr; |
127 | __u64 allocation_size; | |
128 | __u64 end_of_file; | |
4468eb3f | 129 | umode_t default_mode; |
1da177e4 | 130 | |
966ca923 SF |
131 | /* save mtime and size */ |
132 | local_mtime = tmp_inode->i_mtime; | |
133 | local_size = tmp_inode->i_size; | |
134 | ||
4523cc30 | 135 | if (new_buf_type) { |
5bafd765 SF |
136 | FILE_DIRECTORY_INFO *pfindData = (FILE_DIRECTORY_INFO *)buf; |
137 | ||
138 | attr = le32_to_cpu(pfindData->ExtFileAttributes); | |
139 | allocation_size = le64_to_cpu(pfindData->AllocationSize); | |
140 | end_of_file = le64_to_cpu(pfindData->EndOfFile); | |
141 | tmp_inode->i_atime = | |
07119a4d | 142 | cifs_NTtimeToUnix(pfindData->LastAccessTime); |
5bafd765 | 143 | tmp_inode->i_mtime = |
07119a4d | 144 | cifs_NTtimeToUnix(pfindData->LastWriteTime); |
5bafd765 | 145 | tmp_inode->i_ctime = |
07119a4d | 146 | cifs_NTtimeToUnix(pfindData->ChangeTime); |
5bafd765 | 147 | } else { /* legacy, OS2 and DOS style */ |
c4a2c08d | 148 | int offset = cifs_sb->tcon->ses->server->timeAdj; |
ad7a2926 | 149 | FIND_FILE_STANDARD_INFO *pfindData = |
5bafd765 SF |
150 | (FIND_FILE_STANDARD_INFO *)buf; |
151 | ||
c4a2c08d JL |
152 | tmp_inode->i_mtime = cnvrtDosUnixTm(pfindData->LastWriteDate, |
153 | pfindData->LastWriteTime, | |
154 | offset); | |
155 | tmp_inode->i_atime = cnvrtDosUnixTm(pfindData->LastAccessDate, | |
156 | pfindData->LastAccessTime, | |
157 | offset); | |
158 | tmp_inode->i_ctime = cnvrtDosUnixTm(pfindData->LastWriteDate, | |
159 | pfindData->LastWriteTime, | |
160 | offset); | |
5bafd765 SF |
161 | attr = le16_to_cpu(pfindData->Attributes); |
162 | allocation_size = le32_to_cpu(pfindData->AllocationSize); | |
163 | end_of_file = le32_to_cpu(pfindData->DataSize); | |
5bafd765 SF |
164 | } |
165 | ||
1da177e4 | 166 | /* Linux can not store file creation time unfortunately so ignore it */ |
5bafd765 SF |
167 | |
168 | cifsInfo->cifsAttrs = attr; | |
a6f8de3d SF |
169 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
170 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
171 | /* get more accurate mode via ACL - so force inode refresh */ | |
172 | cifsInfo->time = 0; | |
173 | } else | |
174 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
175 | cifsInfo->time = jiffies; | |
5bafd765 | 176 | |
1da177e4 LT |
177 | /* treat dos attribute of read-only as read-only mode bit e.g. 555? */ |
178 | /* 2767 perms - indicate mandatory locking */ | |
790fe579 | 179 | /* BB fill in uid and gid here? with help from winbind? |
1da177e4 LT |
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; | |
4468eb3f JL |
184 | } |
185 | ||
186 | if (attr & ATTR_DIRECTORY) | |
187 | default_mode = cifs_sb->mnt_dir_mode; | |
188 | else | |
189 | default_mode = cifs_sb->mnt_file_mode; | |
190 | ||
191 | /* set initial permissions */ | |
192 | if ((atomic_read(&cifsInfo->inUse) == 0) || | |
193 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) | |
194 | tmp_inode->i_mode = default_mode; | |
195 | else { | |
196 | /* just reenable write bits if !ATTR_READONLY */ | |
197 | if ((tmp_inode->i_mode & S_IWUGO) == 0 && | |
198 | (attr & ATTR_READONLY) == 0) | |
199 | tmp_inode->i_mode |= (S_IWUGO & default_mode); | |
200 | ||
3020a1f5 | 201 | tmp_inode->i_mode &= ~S_IFMT; |
1da177e4 LT |
202 | } |
203 | ||
4468eb3f JL |
204 | /* clear write bits if ATTR_READONLY is set */ |
205 | if (attr & ATTR_READONLY) | |
206 | tmp_inode->i_mode &= ~S_IWUGO; | |
207 | ||
208 | /* set inode type */ | |
209 | if ((attr & ATTR_SYSTEM) && | |
210 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) { | |
3020a1f5 | 211 | if (end_of_file == 0) { |
3020a1f5 | 212 | tmp_inode->i_mode |= S_IFIFO; |
4468eb3f | 213 | *pobject_type = DT_FIFO; |
3020a1f5 | 214 | } else { |
4468eb3f JL |
215 | /* |
216 | * trying to get the type can be slow, so just call | |
217 | * this a regular file for now, and mark for reval | |
218 | */ | |
790fe579 | 219 | tmp_inode->i_mode |= S_IFREG; |
4468eb3f | 220 | *pobject_type = DT_REG; |
790fe579 | 221 | cifsInfo->time = 0; |
3020a1f5 | 222 | } |
1da177e4 | 223 | } else { |
4468eb3f JL |
224 | if (attr & ATTR_DIRECTORY) { |
225 | tmp_inode->i_mode |= S_IFDIR; | |
226 | *pobject_type = DT_DIR; | |
227 | } else { | |
228 | tmp_inode->i_mode |= S_IFREG; | |
229 | *pobject_type = DT_REG; | |
230 | } | |
231 | } | |
1da177e4 LT |
232 | |
233 | /* can not fill in nlink here as in qpathinfo version and Unx search */ | |
ad7a2926 | 234 | if (atomic_read(&cifsInfo->inUse) == 0) |
1da177e4 | 235 | atomic_set(&cifsInfo->inUse, 1); |
1da177e4 | 236 | |
fbec9ab9 | 237 | cifsInfo->server_eof = end_of_file; |
3677db10 | 238 | spin_lock(&tmp_inode->i_lock); |
7ba52631 | 239 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { |
790fe579 | 240 | /* can not safely change the file size here if the |
1da177e4 LT |
241 | client is writing to it due to potential races */ |
242 | i_size_write(tmp_inode, end_of_file); | |
243 | ||
244 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
245 | /* for this calculation, even though the reported blocksize is larger */ | |
246 | tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9; | |
247 | } | |
3677db10 | 248 | spin_unlock(&tmp_inode->i_lock); |
1da177e4 LT |
249 | |
250 | if (allocation_size < end_of_file) | |
251 | cFYI(1, ("May be sparse file, allocation less than file size")); | |
ba52de12 | 252 | cFYI(1, ("File Size %ld and blocks %llu", |
5515eff8 | 253 | (unsigned long)tmp_inode->i_size, |
ba52de12 | 254 | (unsigned long long)tmp_inode->i_blocks)); |
1da177e4 | 255 | if (S_ISREG(tmp_inode->i_mode)) { |
966ca923 | 256 | cFYI(1, ("File inode")); |
1da177e4 | 257 | tmp_inode->i_op = &cifs_file_inode_ops; |
4523cc30 SF |
258 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
259 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
8b94bcb9 SF |
260 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; |
261 | else | |
262 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
4523cc30 | 263 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
8b94bcb9 | 264 | tmp_inode->i_fop = &cifs_file_nobrl_ops; |
1da177e4 LT |
265 | else |
266 | tmp_inode->i_fop = &cifs_file_ops; | |
f3f6ec4b | 267 | |
4523cc30 | 268 | if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
bfa0d75a | 269 | (cifs_sb->tcon->ses->server->maxBuf < |
273d81d6 DK |
270 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
271 | tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
272 | else | |
273 | tmp_inode->i_data.a_ops = &cifs_addr_ops; | |
274 | ||
4523cc30 | 275 | if (isNewInode) |
dfb7533b SF |
276 | return; /* No sense invalidating pages for new inode |
277 | since have not started caching readahead file | |
278 | data yet */ | |
966ca923 SF |
279 | |
280 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
281 | (local_size == tmp_inode->i_size)) { | |
282 | cFYI(1, ("inode exists but unchanged")); | |
283 | } else { | |
284 | /* file may have changed on server */ | |
285 | cFYI(1, ("invalidate inode, readdir detected change")); | |
286 | invalidate_remote_inode(tmp_inode); | |
287 | } | |
1da177e4 | 288 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
966ca923 | 289 | cFYI(1, ("Directory inode")); |
1da177e4 LT |
290 | tmp_inode->i_op = &cifs_dir_inode_ops; |
291 | tmp_inode->i_fop = &cifs_dir_ops; | |
292 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
966ca923 | 293 | cFYI(1, ("Symbolic Link inode")); |
1da177e4 LT |
294 | tmp_inode->i_op = &cifs_symlink_inode_ops; |
295 | } else { | |
966ca923 | 296 | cFYI(1, ("Init special inode")); |
1da177e4 LT |
297 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
298 | tmp_inode->i_rdev); | |
299 | } | |
300 | } | |
301 | ||
302 | static void unix_fill_in_inode(struct inode *tmp_inode, | |
2c2130e1 | 303 | FILE_UNIX_INFO *pfindData, unsigned int *pobject_type, int isNewInode) |
1da177e4 | 304 | { |
966ca923 SF |
305 | loff_t local_size; |
306 | struct timespec local_mtime; | |
307 | ||
1da177e4 LT |
308 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
309 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
310 | ||
311 | __u32 type = le32_to_cpu(pfindData->Type); | |
312 | __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes); | |
313 | __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile); | |
314 | cifsInfo->time = jiffies; | |
315 | atomic_inc(&cifsInfo->inUse); | |
316 | ||
966ca923 SF |
317 | /* save mtime and size */ |
318 | local_mtime = tmp_inode->i_mtime; | |
319 | local_size = tmp_inode->i_size; | |
320 | ||
1da177e4 | 321 | tmp_inode->i_atime = |
07119a4d | 322 | cifs_NTtimeToUnix(pfindData->LastAccessTime); |
1da177e4 | 323 | tmp_inode->i_mtime = |
07119a4d | 324 | cifs_NTtimeToUnix(pfindData->LastModificationTime); |
1da177e4 | 325 | tmp_inode->i_ctime = |
07119a4d | 326 | cifs_NTtimeToUnix(pfindData->LastStatusChange); |
1da177e4 LT |
327 | |
328 | tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions); | |
3020a1f5 | 329 | /* since we set the inode type below we need to mask off type |
790fe579 SF |
330 | to avoid strange results if bits above were corrupt */ |
331 | tmp_inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
332 | if (type == UNIX_FILE) { |
333 | *pobject_type = DT_REG; | |
334 | tmp_inode->i_mode |= S_IFREG; | |
335 | } else if (type == UNIX_SYMLINK) { | |
336 | *pobject_type = DT_LNK; | |
337 | tmp_inode->i_mode |= S_IFLNK; | |
338 | } else if (type == UNIX_DIR) { | |
339 | *pobject_type = DT_DIR; | |
340 | tmp_inode->i_mode |= S_IFDIR; | |
341 | } else if (type == UNIX_CHARDEV) { | |
342 | *pobject_type = DT_CHR; | |
343 | tmp_inode->i_mode |= S_IFCHR; | |
344 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
345 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
346 | } else if (type == UNIX_BLOCKDEV) { | |
347 | *pobject_type = DT_BLK; | |
348 | tmp_inode->i_mode |= S_IFBLK; | |
349 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
350 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
351 | } else if (type == UNIX_FIFO) { | |
352 | *pobject_type = DT_FIFO; | |
353 | tmp_inode->i_mode |= S_IFIFO; | |
354 | } else if (type == UNIX_SOCKET) { | |
355 | *pobject_type = DT_SOCK; | |
356 | tmp_inode->i_mode |= S_IFSOCK; | |
3020a1f5 SF |
357 | } else { |
358 | /* safest to just call it a file */ | |
359 | *pobject_type = DT_REG; | |
360 | tmp_inode->i_mode |= S_IFREG; | |
790fe579 | 361 | cFYI(1, ("unknown inode type %d", type)); |
1da177e4 LT |
362 | } |
363 | ||
4523cc30 SF |
364 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
365 | tmp_inode->i_uid = cifs_sb->mnt_uid; | |
366 | else | |
367 | tmp_inode->i_uid = le64_to_cpu(pfindData->Uid); | |
368 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) | |
369 | tmp_inode->i_gid = cifs_sb->mnt_gid; | |
370 | else | |
371 | tmp_inode->i_gid = le64_to_cpu(pfindData->Gid); | |
1da177e4 LT |
372 | tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks); |
373 | ||
fbec9ab9 | 374 | cifsInfo->server_eof = end_of_file; |
3677db10 | 375 | spin_lock(&tmp_inode->i_lock); |
7ba52631 | 376 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { |
790fe579 | 377 | /* can not safely change the file size here if the |
1da177e4 | 378 | client is writing to it due to potential races */ |
7ba52631 | 379 | i_size_write(tmp_inode, end_of_file); |
1da177e4 LT |
380 | |
381 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
382 | /* for this calculation, not the real blocksize */ | |
383 | tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; | |
384 | } | |
3677db10 | 385 | spin_unlock(&tmp_inode->i_lock); |
1da177e4 LT |
386 | |
387 | if (S_ISREG(tmp_inode->i_mode)) { | |
388 | cFYI(1, ("File inode")); | |
389 | tmp_inode->i_op = &cifs_file_inode_ops; | |
f3f6ec4b | 390 | |
4523cc30 SF |
391 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
392 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
f3f6ec4b SF |
393 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; |
394 | else | |
395 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
4523cc30 | 396 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
f3f6ec4b | 397 | tmp_inode->i_fop = &cifs_file_nobrl_ops; |
1da177e4 LT |
398 | else |
399 | tmp_inode->i_fop = &cifs_file_ops; | |
f3f6ec4b | 400 | |
4523cc30 | 401 | if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
790fe579 | 402 | (cifs_sb->tcon->ses->server->maxBuf < |
273d81d6 DK |
403 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
404 | tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
405 | else | |
406 | tmp_inode->i_data.a_ops = &cifs_addr_ops; | |
966ca923 | 407 | |
4523cc30 | 408 | if (isNewInode) |
790fe579 SF |
409 | return; /* No sense invalidating pages for new inode |
410 | since we have not started caching readahead | |
411 | file data for it yet */ | |
966ca923 SF |
412 | |
413 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
414 | (local_size == tmp_inode->i_size)) { | |
415 | cFYI(1, ("inode exists but unchanged")); | |
416 | } else { | |
417 | /* file may have changed on server */ | |
418 | cFYI(1, ("invalidate inode, readdir detected change")); | |
419 | invalidate_remote_inode(tmp_inode); | |
420 | } | |
1da177e4 LT |
421 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
422 | cFYI(1, ("Directory inode")); | |
423 | tmp_inode->i_op = &cifs_dir_inode_ops; | |
424 | tmp_inode->i_fop = &cifs_dir_ops; | |
425 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
426 | cFYI(1, ("Symbolic Link inode")); | |
427 | tmp_inode->i_op = &cifs_symlink_inode_ops; | |
428 | /* tmp_inode->i_fop = *//* do not need to set to anything */ | |
429 | } else { | |
790fe579 | 430 | cFYI(1, ("Special inode")); |
1da177e4 LT |
431 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
432 | tmp_inode->i_rdev); | |
433 | } | |
434 | } | |
435 | ||
0e0d2cf3 SF |
436 | /* BB eventually need to add the following helper function to |
437 | resolve NT_STATUS_STOPPED_ON_SYMLINK return code when | |
438 | we try to do FindFirst on (NTFS) directory symlinks */ | |
439 | /* | |
440 | int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb, | |
441 | int xid) | |
442 | { | |
443 | __u16 fid; | |
444 | int len; | |
445 | int oplock = 0; | |
446 | int rc; | |
447 | struct cifsTconInfo *ptcon = cifs_sb->tcon; | |
448 | char *tmpbuffer; | |
449 | ||
450 | rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ, | |
451 | OPEN_REPARSE_POINT, &fid, &oplock, NULL, | |
452 | cifs_sb->local_nls, | |
453 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
454 | if (!rc) { | |
455 | tmpbuffer = kmalloc(maxpath); | |
456 | rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path, | |
457 | tmpbuffer, | |
458 | maxpath -1, | |
459 | fid, | |
460 | cifs_sb->local_nls); | |
461 | if (CIFSSMBClose(xid, ptcon, fid)) { | |
462 | cFYI(1, ("Error closing temporary reparsepoint open)")); | |
463 | } | |
464 | } | |
465 | } | |
466 | */ | |
467 | ||
1da177e4 LT |
468 | static int initiate_cifs_search(const int xid, struct file *file) |
469 | { | |
470 | int rc = 0; | |
3870253e SF |
471 | char *full_path; |
472 | struct cifsFileInfo *cifsFile; | |
1da177e4 LT |
473 | struct cifs_sb_info *cifs_sb; |
474 | struct cifsTconInfo *pTcon; | |
475 | ||
4523cc30 | 476 | if (file->private_data == NULL) { |
3870253e SF |
477 | file->private_data = |
478 | kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); | |
1da177e4 LT |
479 | } |
480 | ||
4523cc30 | 481 | if (file->private_data == NULL) |
1da177e4 | 482 | return -ENOMEM; |
1da177e4 | 483 | cifsFile = file->private_data; |
4b18f2a9 SF |
484 | cifsFile->invalidHandle = true; |
485 | cifsFile->srch_inf.endOfSearch = false; | |
1da177e4 | 486 | |
e6a00296 | 487 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
4523cc30 | 488 | if (cifs_sb == NULL) |
1da177e4 LT |
489 | return -EINVAL; |
490 | ||
491 | pTcon = cifs_sb->tcon; | |
4523cc30 | 492 | if (pTcon == NULL) |
1da177e4 LT |
493 | return -EINVAL; |
494 | ||
e6a00296 | 495 | full_path = build_path_from_dentry(file->f_path.dentry); |
1da177e4 | 496 | |
ad7a2926 | 497 | if (full_path == NULL) |
1da177e4 | 498 | return -ENOMEM; |
1da177e4 | 499 | |
966ca923 | 500 | cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos)); |
1da177e4 | 501 | |
75cf6bdc | 502 | ffirst_retry: |
1da177e4 | 503 | /* test for Unix extensions */ |
c18c842b SF |
504 | /* but now check for them on the share/mount not on the SMB session */ |
505 | /* if (pTcon->ses->capabilities & CAP_UNIX) { */ | |
ad7a2926 | 506 | if (pTcon->unix_ext) |
5bafd765 | 507 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX; |
ad7a2926 | 508 | else if ((pTcon->ses->capabilities & |
5bafd765 SF |
509 | (CAP_NT_SMBS | CAP_NT_FIND)) == 0) { |
510 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD; | |
1da177e4 LT |
511 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
512 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; | |
513 | } else /* not srvinos - BB fixme add check for backlevel? */ { | |
514 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
515 | } | |
516 | ||
3870253e | 517 | rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls, |
737b758c | 518 | &cifsFile->netfid, &cifsFile->srch_inf, |
3870253e | 519 | cifs_sb->mnt_cifs_flags & |
eafe8701 | 520 | CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); |
4523cc30 | 521 | if (rc == 0) |
4b18f2a9 | 522 | cifsFile->invalidHandle = false; |
e836f015 | 523 | /* BB add following call to handle readdir on new NTFS symlink errors |
0e0d2cf3 SF |
524 | else if STATUS_STOPPED_ON_SYMLINK |
525 | call get_symlink_reparse_path and retry with new path */ | |
526 | else if ((rc == -EOPNOTSUPP) && | |
75cf6bdc SF |
527 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
528 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; | |
529 | goto ffirst_retry; | |
530 | } | |
1da177e4 LT |
531 | kfree(full_path); |
532 | return rc; | |
533 | } | |
534 | ||
535 | /* return length of unicode string in bytes */ | |
536 | static int cifs_unicode_bytelen(char *str) | |
537 | { | |
538 | int len; | |
63d2583f | 539 | __le16 *ustr = (__le16 *)str; |
1da177e4 | 540 | |
3870253e | 541 | for (len = 0; len <= PATH_MAX; len++) { |
4523cc30 | 542 | if (ustr[len] == 0) |
1da177e4 LT |
543 | return len << 1; |
544 | } | |
790fe579 | 545 | cFYI(1, ("Unicode string longer than PATH_MAX found")); |
1da177e4 LT |
546 | return len << 1; |
547 | } | |
548 | ||
5bafd765 | 549 | static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level) |
1da177e4 | 550 | { |
3870253e | 551 | char *new_entry; |
ad7a2926 | 552 | FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry; |
1da177e4 | 553 | |
4523cc30 | 554 | if (level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 555 | FIND_FILE_STANDARD_INFO *pfData; |
5bafd765 SF |
556 | pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo; |
557 | ||
558 | new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) + | |
559 | pfData->FileNameLength; | |
560 | } else | |
561 | new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset); | |
790fe579 | 562 | cFYI(1, ("new entry %p old entry %p", new_entry, old_entry)); |
1da177e4 | 563 | /* validate that new_entry is not past end of SMB */ |
4523cc30 | 564 | if (new_entry >= end_of_smb) { |
09d1db5c SF |
565 | cERROR(1, |
566 | ("search entry %p began after end of SMB %p old entry %p", | |
3870253e | 567 | new_entry, end_of_smb, old_entry)); |
1da177e4 | 568 | return NULL; |
4523cc30 | 569 | } else if (((level == SMB_FIND_FILE_INFO_STANDARD) && |
3870253e SF |
570 | (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) |
571 | || ((level != SMB_FIND_FILE_INFO_STANDARD) && | |
5bafd765 | 572 | (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) { |
3870253e | 573 | cERROR(1, ("search entry %p extends after end of SMB %p", |
09d1db5c SF |
574 | new_entry, end_of_smb)); |
575 | return NULL; | |
3870253e | 576 | } else |
1da177e4 LT |
577 | return new_entry; |
578 | ||
579 | } | |
580 | ||
581 | #define UNICODE_DOT cpu_to_le16(0x2e) | |
582 | ||
583 | /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */ | |
584 | static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile) | |
585 | { | |
586 | int rc = 0; | |
3870253e SF |
587 | char *filename = NULL; |
588 | int len = 0; | |
1da177e4 | 589 | |
4523cc30 | 590 | if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) { |
ad7a2926 | 591 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; |
1da177e4 | 592 | filename = &pFindData->FileName[0]; |
4523cc30 | 593 | if (cfile->srch_inf.unicode) { |
1da177e4 LT |
594 | len = cifs_unicode_bytelen(filename); |
595 | } else { | |
596 | /* BB should we make this strnlen of PATH_MAX? */ | |
597 | len = strnlen(filename, 5); | |
598 | } | |
4523cc30 | 599 | } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) { |
ad7a2926 | 600 | FILE_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
601 | (FILE_DIRECTORY_INFO *)current_entry; |
602 | filename = &pFindData->FileName[0]; | |
603 | len = le32_to_cpu(pFindData->FileNameLength); | |
3870253e | 604 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 605 | SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
ad7a2926 | 606 | FILE_FULL_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
607 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
608 | filename = &pFindData->FileName[0]; | |
609 | len = le32_to_cpu(pFindData->FileNameLength); | |
4523cc30 | 610 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 611 | SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
ad7a2926 | 612 | SEARCH_ID_FULL_DIR_INFO *pFindData = |
1da177e4 LT |
613 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
614 | filename = &pFindData->FileName[0]; | |
615 | len = le32_to_cpu(pFindData->FileNameLength); | |
3870253e | 616 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 617 | SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
ad7a2926 | 618 | FILE_BOTH_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
619 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
620 | filename = &pFindData->FileName[0]; | |
621 | len = le32_to_cpu(pFindData->FileNameLength); | |
4523cc30 | 622 | } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 623 | FIND_FILE_STANDARD_INFO *pFindData = |
5bafd765 SF |
624 | (FIND_FILE_STANDARD_INFO *)current_entry; |
625 | filename = &pFindData->FileName[0]; | |
5ddaa683 | 626 | len = pFindData->FileNameLength; |
1da177e4 | 627 | } else { |
790fe579 SF |
628 | cFYI(1, ("Unknown findfirst level %d", |
629 | cfile->srch_inf.info_level)); | |
1da177e4 LT |
630 | } |
631 | ||
4523cc30 SF |
632 | if (filename) { |
633 | if (cfile->srch_inf.unicode) { | |
1da177e4 | 634 | __le16 *ufilename = (__le16 *)filename; |
4523cc30 | 635 | if (len == 2) { |
1da177e4 | 636 | /* check for . */ |
4523cc30 | 637 | if (ufilename[0] == UNICODE_DOT) |
1da177e4 | 638 | rc = 1; |
4523cc30 | 639 | } else if (len == 4) { |
1da177e4 | 640 | /* check for .. */ |
4523cc30 | 641 | if ((ufilename[0] == UNICODE_DOT) |
3870253e | 642 | && (ufilename[1] == UNICODE_DOT)) |
1da177e4 LT |
643 | rc = 2; |
644 | } | |
645 | } else /* ASCII */ { | |
4523cc30 | 646 | if (len == 1) { |
3870253e | 647 | if (filename[0] == '.') |
1da177e4 | 648 | rc = 1; |
4523cc30 | 649 | } else if (len == 2) { |
790fe579 | 650 | if ((filename[0] == '.') && (filename[1] == '.')) |
1da177e4 LT |
651 | rc = 2; |
652 | } | |
653 | } | |
654 | } | |
655 | ||
656 | return rc; | |
657 | } | |
658 | ||
eafe8701 SF |
659 | /* Check if directory that we are searching has changed so we can decide |
660 | whether we can use the cached search results from the previous search */ | |
3870253e | 661 | static int is_dir_changed(struct file *file) |
eafe8701 | 662 | { |
c33f8d32 CH |
663 | struct inode *inode = file->f_path.dentry->d_inode; |
664 | struct cifsInodeInfo *cifsInfo = CIFS_I(inode); | |
eafe8701 | 665 | |
c33f8d32 | 666 | if (cifsInfo->time == 0) |
eafe8701 SF |
667 | return 1; /* directory was changed, perhaps due to unlink */ |
668 | else | |
669 | return 0; | |
670 | ||
671 | } | |
672 | ||
0752f152 SF |
673 | static int cifs_save_resume_key(const char *current_entry, |
674 | struct cifsFileInfo *cifsFile) | |
675 | { | |
676 | int rc = 0; | |
677 | unsigned int len = 0; | |
678 | __u16 level; | |
679 | char *filename; | |
680 | ||
681 | if ((cifsFile == NULL) || (current_entry == NULL)) | |
682 | return -EINVAL; | |
683 | ||
684 | level = cifsFile->srch_inf.info_level; | |
685 | ||
686 | if (level == SMB_FIND_FILE_UNIX) { | |
687 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; | |
688 | ||
689 | filename = &pFindData->FileName[0]; | |
690 | if (cifsFile->srch_inf.unicode) { | |
691 | len = cifs_unicode_bytelen(filename); | |
692 | } else { | |
693 | /* BB should we make this strnlen of PATH_MAX? */ | |
694 | len = strnlen(filename, PATH_MAX); | |
695 | } | |
696 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; | |
697 | } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) { | |
698 | FILE_DIRECTORY_INFO *pFindData = | |
699 | (FILE_DIRECTORY_INFO *)current_entry; | |
700 | filename = &pFindData->FileName[0]; | |
701 | len = le32_to_cpu(pFindData->FileNameLength); | |
702 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
703 | } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { | |
704 | FILE_FULL_DIRECTORY_INFO *pFindData = | |
705 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
706 | filename = &pFindData->FileName[0]; | |
707 | len = le32_to_cpu(pFindData->FileNameLength); | |
708 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
709 | } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { | |
710 | SEARCH_ID_FULL_DIR_INFO *pFindData = | |
711 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
712 | filename = &pFindData->FileName[0]; | |
713 | len = le32_to_cpu(pFindData->FileNameLength); | |
714 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
715 | } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { | |
716 | FILE_BOTH_DIRECTORY_INFO *pFindData = | |
717 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
718 | filename = &pFindData->FileName[0]; | |
719 | len = le32_to_cpu(pFindData->FileNameLength); | |
720 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
721 | } else if (level == SMB_FIND_FILE_INFO_STANDARD) { | |
722 | FIND_FILE_STANDARD_INFO *pFindData = | |
723 | (FIND_FILE_STANDARD_INFO *)current_entry; | |
724 | filename = &pFindData->FileName[0]; | |
725 | /* one byte length, no name conversion */ | |
726 | len = (unsigned int)pFindData->FileNameLength; | |
727 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; | |
728 | } else { | |
729 | cFYI(1, ("Unknown findfirst level %d", level)); | |
730 | return -EINVAL; | |
731 | } | |
732 | cifsFile->srch_inf.resume_name_len = len; | |
733 | cifsFile->srch_inf.presume_name = filename; | |
734 | return rc; | |
735 | } | |
736 | ||
1da177e4 LT |
737 | /* find the corresponding entry in the search */ |
738 | /* Note that the SMB server returns search entries for . and .. which | |
739 | complicates logic here if we choose to parse for them and we do not | |
740 | assume that they are located in the findfirst return buffer.*/ | |
741 | /* We start counting in the buffer with entry 2 and increment for every | |
742 | entry (do not increment for . or .. entry) */ | |
743 | static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon, | |
3870253e | 744 | struct file *file, char **ppCurrentEntry, int *num_to_ret) |
1da177e4 LT |
745 | { |
746 | int rc = 0; | |
747 | int pos_in_buf = 0; | |
748 | loff_t first_entry_in_buffer; | |
749 | loff_t index_to_find = file->f_pos; | |
3870253e | 750 | struct cifsFileInfo *cifsFile = file->private_data; |
1da177e4 | 751 | /* check if index in the buffer */ |
50c2f753 | 752 | |
3870253e | 753 | if ((cifsFile == NULL) || (ppCurrentEntry == NULL) || |
eafe8701 | 754 | (num_to_ret == NULL)) |
1da177e4 | 755 | return -ENOENT; |
50c2f753 | 756 | |
1da177e4 | 757 | *ppCurrentEntry = NULL; |
3870253e SF |
758 | first_entry_in_buffer = |
759 | cifsFile->srch_inf.index_of_last_entry - | |
1da177e4 | 760 | cifsFile->srch_inf.entries_in_buffer; |
60808233 SF |
761 | |
762 | /* if first entry in buf is zero then is first buffer | |
763 | in search response data which means it is likely . and .. | |
764 | will be in this buffer, although some servers do not return | |
765 | . and .. for the root of a drive and for those we need | |
766 | to start two entries earlier */ | |
767 | ||
3979877e | 768 | dump_cifs_file_struct(file, "In fce "); |
3870253e SF |
769 | if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) && |
770 | is_dir_changed(file)) || | |
eafe8701 | 771 | (index_to_find < first_entry_in_buffer)) { |
1da177e4 | 772 | /* close and restart search */ |
790fe579 | 773 | cFYI(1, ("search backing up - close and restart search")); |
ddb4cbfc | 774 | write_lock(&GlobalSMBSeslock); |
77c57ec8 SF |
775 | if (!cifsFile->srch_inf.endOfSearch && |
776 | !cifsFile->invalidHandle) { | |
777 | cifsFile->invalidHandle = true; | |
ddb4cbfc | 778 | write_unlock(&GlobalSMBSeslock); |
77c57ec8 | 779 | CIFSFindClose(xid, pTcon, cifsFile->netfid); |
ddb4cbfc SF |
780 | } else |
781 | write_unlock(&GlobalSMBSeslock); | |
4523cc30 | 782 | if (cifsFile->srch_inf.ntwrk_buf_start) { |
790fe579 | 783 | cFYI(1, ("freeing SMB ff cache buf on search rewind")); |
4523cc30 | 784 | if (cifsFile->srch_inf.smallBuf) |
d47d7c1a SF |
785 | cifs_small_buf_release(cifsFile->srch_inf. |
786 | ntwrk_buf_start); | |
787 | else | |
788 | cifs_buf_release(cifsFile->srch_inf. | |
789 | ntwrk_buf_start); | |
76c510ad | 790 | cifsFile->srch_inf.ntwrk_buf_start = NULL; |
1da177e4 | 791 | } |
3870253e | 792 | rc = initiate_cifs_search(xid, file); |
4523cc30 | 793 | if (rc) { |
790fe579 SF |
794 | cFYI(1, ("error %d reinitiating a search on rewind", |
795 | rc)); | |
1da177e4 LT |
796 | return rc; |
797 | } | |
a364bc0b | 798 | cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile); |
1da177e4 LT |
799 | } |
800 | ||
3870253e | 801 | while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) && |
4b18f2a9 | 802 | (rc == 0) && !cifsFile->srch_inf.endOfSearch) { |
790fe579 | 803 | cFYI(1, ("calling findnext2")); |
3870253e | 804 | rc = CIFSFindNext(xid, pTcon, cifsFile->netfid, |
dfb7533b | 805 | &cifsFile->srch_inf); |
a364bc0b | 806 | cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile); |
4523cc30 | 807 | if (rc) |
1da177e4 LT |
808 | return -ENOENT; |
809 | } | |
4523cc30 | 810 | if (index_to_find < cifsFile->srch_inf.index_of_last_entry) { |
1da177e4 LT |
811 | /* we found the buffer that contains the entry */ |
812 | /* scan and find it */ | |
813 | int i; | |
3870253e SF |
814 | char *current_entry; |
815 | char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + | |
1da177e4 LT |
816 | smbCalcSize((struct smb_hdr *) |
817 | cifsFile->srch_inf.ntwrk_buf_start); | |
60808233 SF |
818 | |
819 | current_entry = cifsFile->srch_inf.srch_entries_start; | |
1da177e4 LT |
820 | first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry |
821 | - cifsFile->srch_inf.entries_in_buffer; | |
822 | pos_in_buf = index_to_find - first_entry_in_buffer; | |
790fe579 | 823 | cFYI(1, ("found entry - pos_in_buf %d", pos_in_buf)); |
5bafd765 | 824 | |
ad7a2926 | 825 | for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) { |
dfb7533b | 826 | /* go entry by entry figuring out which is first */ |
3870253e | 827 | current_entry = nxt_dir_entry(current_entry, end_of_smb, |
5bafd765 | 828 | cifsFile->srch_inf.info_level); |
1da177e4 | 829 | } |
790fe579 | 830 | if ((current_entry == NULL) && (i < pos_in_buf)) { |
1da177e4 | 831 | /* BB fixme - check if we should flag this error */ |
3870253e | 832 | cERROR(1, ("reached end of buf searching for pos in buf" |
1da177e4 | 833 | " %d index to find %lld rc %d", |
3870253e | 834 | pos_in_buf, index_to_find, rc)); |
1da177e4 LT |
835 | } |
836 | rc = 0; | |
837 | *ppCurrentEntry = current_entry; | |
838 | } else { | |
790fe579 | 839 | cFYI(1, ("index not in buffer - could not findnext into it")); |
1da177e4 LT |
840 | return 0; |
841 | } | |
842 | ||
790fe579 SF |
843 | if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) { |
844 | cFYI(1, ("can not return entries pos_in_buf beyond last")); | |
1da177e4 LT |
845 | *num_to_ret = 0; |
846 | } else | |
847 | *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf; | |
1da177e4 LT |
848 | |
849 | return rc; | |
850 | } | |
851 | ||
852 | /* inode num, inode type and filename returned */ | |
853 | static int cifs_get_name_from_search_buf(struct qstr *pqst, | |
854 | char *current_entry, __u16 level, unsigned int unicode, | |
18295796 | 855 | struct cifs_sb_info *cifs_sb, unsigned int max_len, __u64 *pinum) |
1da177e4 LT |
856 | { |
857 | int rc = 0; | |
858 | unsigned int len = 0; | |
3870253e SF |
859 | char *filename; |
860 | struct nls_table *nlt = cifs_sb->local_nls; | |
1da177e4 LT |
861 | |
862 | *pinum = 0; | |
863 | ||
790fe579 | 864 | if (level == SMB_FIND_FILE_UNIX) { |
3870253e | 865 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; |
1da177e4 LT |
866 | |
867 | filename = &pFindData->FileName[0]; | |
790fe579 | 868 | if (unicode) { |
1da177e4 LT |
869 | len = cifs_unicode_bytelen(filename); |
870 | } else { | |
871 | /* BB should we make this strnlen of PATH_MAX? */ | |
872 | len = strnlen(filename, PATH_MAX); | |
873 | } | |
874 | ||
85a6dac5 | 875 | *pinum = le64_to_cpu(pFindData->UniqueId); |
790fe579 | 876 | } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) { |
3870253e | 877 | FILE_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
878 | (FILE_DIRECTORY_INFO *)current_entry; |
879 | filename = &pFindData->FileName[0]; | |
880 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 881 | } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
3870253e | 882 | FILE_FULL_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
883 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
884 | filename = &pFindData->FileName[0]; | |
885 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 886 | } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
3870253e | 887 | SEARCH_ID_FULL_DIR_INFO *pFindData = |
1da177e4 LT |
888 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
889 | filename = &pFindData->FileName[0]; | |
890 | len = le32_to_cpu(pFindData->FileNameLength); | |
85a6dac5 | 891 | *pinum = le64_to_cpu(pFindData->UniqueId); |
790fe579 | 892 | } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
3870253e | 893 | FILE_BOTH_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
894 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
895 | filename = &pFindData->FileName[0]; | |
896 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 897 | } else if (level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 898 | FIND_FILE_STANDARD_INFO *pFindData = |
5bafd765 SF |
899 | (FIND_FILE_STANDARD_INFO *)current_entry; |
900 | filename = &pFindData->FileName[0]; | |
901 | /* one byte length, no name conversion */ | |
902 | len = (unsigned int)pFindData->FileNameLength; | |
1da177e4 | 903 | } else { |
790fe579 | 904 | cFYI(1, ("Unknown findfirst level %d", level)); |
1da177e4 LT |
905 | return -EINVAL; |
906 | } | |
5bafd765 | 907 | |
790fe579 | 908 | if (len > max_len) { |
3870253e | 909 | cERROR(1, ("bad search response length %d past smb end", len)); |
5bafd765 SF |
910 | return -EINVAL; |
911 | } | |
912 | ||
790fe579 | 913 | if (unicode) { |
f5884166 JL |
914 | pqst->len = cifs_from_ucs2((char *) pqst->name, |
915 | (__le16 *) filename, | |
18295796 JL |
916 | UNICODE_NAME_MAX, |
917 | min(len, max_len), nlt, | |
f5884166 JL |
918 | cifs_sb->mnt_cifs_flags & |
919 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
920 | } else { |
921 | pqst->name = filename; | |
922 | pqst->len = len; | |
923 | } | |
3870253e | 924 | pqst->hash = full_name_hash(pqst->name, pqst->len); |
790fe579 | 925 | /* cFYI(1, ("filldir on %s",pqst->name)); */ |
1da177e4 LT |
926 | return rc; |
927 | } | |
928 | ||
18295796 JL |
929 | static int cifs_filldir(char *pfindEntry, struct file *file, filldir_t filldir, |
930 | void *direntry, char *scratch_buf, unsigned int max_len) | |
1da177e4 LT |
931 | { |
932 | int rc = 0; | |
933 | struct qstr qstring; | |
3870253e | 934 | struct cifsFileInfo *pCifsF; |
2c2130e1 | 935 | unsigned int obj_type; |
950ec528 | 936 | __u64 inum; |
3870253e | 937 | struct cifs_sb_info *cifs_sb; |
1da177e4 LT |
938 | struct inode *tmp_inode; |
939 | struct dentry *tmp_dentry; | |
940 | ||
941 | /* get filename and len into qstring */ | |
942 | /* get dentry */ | |
943 | /* decide whether to create and populate ionde */ | |
790fe579 | 944 | if ((direntry == NULL) || (file == NULL)) |
1da177e4 LT |
945 | return -EINVAL; |
946 | ||
947 | pCifsF = file->private_data; | |
50c2f753 | 948 | |
790fe579 | 949 | if ((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL)) |
1da177e4 LT |
950 | return -ENOENT; |
951 | ||
3870253e | 952 | rc = cifs_entry_is_dot(pfindEntry, pCifsF); |
60808233 | 953 | /* skip . and .. since we added them first */ |
790fe579 | 954 | if (rc != 0) |
60808233 SF |
955 | return 0; |
956 | ||
e6a00296 | 957 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 LT |
958 | |
959 | qstring.name = scratch_buf; | |
3870253e | 960 | rc = cifs_get_name_from_search_buf(&qstring, pfindEntry, |
1da177e4 | 961 | pCifsF->srch_inf.info_level, |
3870253e | 962 | pCifsF->srch_inf.unicode, cifs_sb, |
5bafd765 | 963 | max_len, |
1da177e4 LT |
964 | &inum /* returned */); |
965 | ||
790fe579 | 966 | if (rc) |
1da177e4 LT |
967 | return rc; |
968 | ||
132ac7b7 JL |
969 | /* only these two infolevels return valid inode numbers */ |
970 | if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX || | |
971 | pCifsF->srch_inf.info_level == SMB_FIND_FILE_ID_FULL_DIR_INFO) | |
972 | rc = construct_dentry(&qstring, file, &tmp_inode, &tmp_dentry, | |
973 | &inum); | |
974 | else | |
975 | rc = construct_dentry(&qstring, file, &tmp_inode, &tmp_dentry, | |
976 | NULL); | |
977 | ||
790fe579 | 978 | if ((tmp_inode == NULL) || (tmp_dentry == NULL)) |
1da177e4 LT |
979 | return -ENOMEM; |
980 | ||
966ca923 SF |
981 | /* we pass in rc below, indicating whether it is a new inode, |
982 | so we can figure out whether to invalidate the inode cached | |
983 | data if the file has changed */ | |
790fe579 | 984 | if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) |
966ca923 | 985 | unix_fill_in_inode(tmp_inode, |
5bafd765 SF |
986 | (FILE_UNIX_INFO *)pfindEntry, |
987 | &obj_type, rc); | |
790fe579 | 988 | else if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) |
5bafd765 SF |
989 | fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */, |
990 | pfindEntry, &obj_type, rc); | |
991 | else | |
992 | fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc); | |
b835bebe | 993 | |
790fe579 | 994 | if (rc) /* new inode - needs to be tied to dentry */ { |
b835bebe | 995 | d_instantiate(tmp_dentry, tmp_inode); |
790fe579 | 996 | if (rc == 2) |
b835bebe SF |
997 | d_rehash(tmp_dentry); |
998 | } | |
50c2f753 | 999 | |
3870253e SF |
1000 | |
1001 | rc = filldir(direntry, qstring.name, qstring.len, file->f_pos, | |
1002 | tmp_inode->i_ino, obj_type); | |
790fe579 SF |
1003 | if (rc) { |
1004 | cFYI(1, ("filldir rc = %d", rc)); | |
7ca85ba7 SF |
1005 | /* we can not return filldir errors to the caller |
1006 | since they are "normal" when the stat blocksize | |
1007 | is too small - we return remapped error instead */ | |
1008 | rc = -EOVERFLOW; | |
1da177e4 LT |
1009 | } |
1010 | ||
1011 | dput(tmp_dentry); | |
1012 | return rc; | |
1013 | } | |
1014 | ||
1da177e4 LT |
1015 | |
1016 | int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) | |
1017 | { | |
1018 | int rc = 0; | |
3870253e | 1019 | int xid, i; |
1da177e4 LT |
1020 | struct cifs_sb_info *cifs_sb; |
1021 | struct cifsTconInfo *pTcon; | |
1022 | struct cifsFileInfo *cifsFile = NULL; | |
3870253e | 1023 | char *current_entry; |
1da177e4 | 1024 | int num_to_fill = 0; |
3870253e | 1025 | char *tmp_buf = NULL; |
50c2f753 | 1026 | char *end_of_smb; |
18295796 | 1027 | unsigned int max_len; |
1da177e4 LT |
1028 | |
1029 | xid = GetXid(); | |
1030 | ||
e6a00296 | 1031 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 | 1032 | pTcon = cifs_sb->tcon; |
790fe579 | 1033 | if (pTcon == NULL) |
1da177e4 LT |
1034 | return -EINVAL; |
1035 | ||
1da177e4 LT |
1036 | switch ((int) file->f_pos) { |
1037 | case 0: | |
60808233 | 1038 | if (filldir(direntry, ".", 1, file->f_pos, |
e6a00296 | 1039 | file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) { |
60808233 | 1040 | cERROR(1, ("Filldir for current dir failed")); |
1da177e4 LT |
1041 | rc = -ENOMEM; |
1042 | break; | |
1043 | } | |
60808233 | 1044 | file->f_pos++; |
1da177e4 | 1045 | case 1: |
60808233 | 1046 | if (filldir(direntry, "..", 2, file->f_pos, |
e6a00296 | 1047 | file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) { |
26a21b98 | 1048 | cERROR(1, ("Filldir for parent dir failed")); |
1da177e4 LT |
1049 | rc = -ENOMEM; |
1050 | break; | |
1051 | } | |
60808233 SF |
1052 | file->f_pos++; |
1053 | default: | |
3870253e SF |
1054 | /* 1) If search is active, |
1055 | is in current search buffer? | |
1da177e4 LT |
1056 | if it before then restart search |
1057 | if after then keep searching till find it */ | |
1058 | ||
790fe579 | 1059 | if (file->private_data == NULL) { |
3870253e | 1060 | rc = initiate_cifs_search(xid, file); |
790fe579 SF |
1061 | cFYI(1, ("initiate cifs search rc %d", rc)); |
1062 | if (rc) { | |
1da177e4 LT |
1063 | FreeXid(xid); |
1064 | return rc; | |
1065 | } | |
1066 | } | |
790fe579 | 1067 | if (file->private_data == NULL) { |
1da177e4 LT |
1068 | rc = -EINVAL; |
1069 | FreeXid(xid); | |
1070 | return rc; | |
1071 | } | |
1072 | cifsFile = file->private_data; | |
1073 | if (cifsFile->srch_inf.endOfSearch) { | |
790fe579 | 1074 | if (cifsFile->srch_inf.emptyDir) { |
1da177e4 LT |
1075 | cFYI(1, ("End of search, empty dir")); |
1076 | rc = 0; | |
1077 | break; | |
1078 | } | |
1079 | } /* else { | |
4b18f2a9 | 1080 | cifsFile->invalidHandle = true; |
1da177e4 | 1081 | CIFSFindClose(xid, pTcon, cifsFile->netfid); |
aaa9bbe0 | 1082 | } */ |
1da177e4 | 1083 | |
3870253e SF |
1084 | rc = find_cifs_entry(xid, pTcon, file, |
1085 | ¤t_entry, &num_to_fill); | |
790fe579 SF |
1086 | if (rc) { |
1087 | cFYI(1, ("fce error %d", rc)); | |
1da177e4 LT |
1088 | goto rddir2_exit; |
1089 | } else if (current_entry != NULL) { | |
790fe579 | 1090 | cFYI(1, ("entry %lld found", file->f_pos)); |
1da177e4 | 1091 | } else { |
790fe579 | 1092 | cFYI(1, ("could not find entry")); |
1da177e4 LT |
1093 | goto rddir2_exit; |
1094 | } | |
790fe579 SF |
1095 | cFYI(1, ("loop through %d times filling dir for net buf %p", |
1096 | num_to_fill, cifsFile->srch_inf.ntwrk_buf_start)); | |
5bafd765 SF |
1097 | max_len = smbCalcSize((struct smb_hdr *) |
1098 | cifsFile->srch_inf.ntwrk_buf_start); | |
1099 | end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len; | |
1100 | ||
f5884166 | 1101 | tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL); |
790fe579 SF |
1102 | for (i = 0; (i < num_to_fill) && (rc == 0); i++) { |
1103 | if (current_entry == NULL) { | |
1da177e4 | 1104 | /* evaluate whether this case is an error */ |
26f57364 | 1105 | cERROR(1, ("past SMB end, num to fill %d i %d", |
1da177e4 LT |
1106 | num_to_fill, i)); |
1107 | break; | |
1108 | } | |
60808233 SF |
1109 | /* if buggy server returns . and .. late do |
1110 | we want to check for that here? */ | |
5bafd765 SF |
1111 | rc = cifs_filldir(current_entry, file, |
1112 | filldir, direntry, tmp_buf, max_len); | |
790fe579 | 1113 | if (rc == -EOVERFLOW) { |
7ca85ba7 SF |
1114 | rc = 0; |
1115 | break; | |
1116 | } | |
1117 | ||
1da177e4 | 1118 | file->f_pos++; |
790fe579 | 1119 | if (file->f_pos == |
3979877e | 1120 | cifsFile->srch_inf.index_of_last_entry) { |
790fe579 SF |
1121 | cFYI(1, ("last entry in buf at pos %lld %s", |
1122 | file->f_pos, tmp_buf)); | |
1123 | cifs_save_resume_key(current_entry, cifsFile); | |
1da177e4 | 1124 | break; |
790fe579 SF |
1125 | } else |
1126 | current_entry = | |
5bafd765 SF |
1127 | nxt_dir_entry(current_entry, end_of_smb, |
1128 | cifsFile->srch_inf.info_level); | |
1da177e4 LT |
1129 | } |
1130 | kfree(tmp_buf); | |
1131 | break; | |
1132 | } /* end switch */ | |
1133 | ||
1134 | rddir2_exit: | |
1da177e4 LT |
1135 | FreeXid(xid); |
1136 | return rc; | |
1137 | } |