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 | ||
790fe579 | 118 | static void AdjustForTZ(struct cifsTconInfo *tcon, struct inode *inode) |
533f90af | 119 | { |
4523cc30 | 120 | if ((tcon) && (tcon->ses) && (tcon->ses->server)) { |
ddae957d SF |
121 | inode->i_ctime.tv_sec += tcon->ses->server->timeAdj; |
122 | inode->i_mtime.tv_sec += tcon->ses->server->timeAdj; | |
123 | inode->i_atime.tv_sec += tcon->ses->server->timeAdj; | |
533f90af SF |
124 | } |
125 | return; | |
126 | } | |
127 | ||
128 | ||
5bafd765 | 129 | static void fill_in_inode(struct inode *tmp_inode, int new_buf_type, |
2c2130e1 | 130 | char *buf, unsigned int *pobject_type, int isNewInode) |
1da177e4 | 131 | { |
966ca923 SF |
132 | loff_t local_size; |
133 | struct timespec local_mtime; | |
134 | ||
1da177e4 LT |
135 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
136 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
5bafd765 SF |
137 | __u32 attr; |
138 | __u64 allocation_size; | |
139 | __u64 end_of_file; | |
4468eb3f | 140 | umode_t default_mode; |
1da177e4 | 141 | |
966ca923 SF |
142 | /* save mtime and size */ |
143 | local_mtime = tmp_inode->i_mtime; | |
144 | local_size = tmp_inode->i_size; | |
145 | ||
4523cc30 | 146 | if (new_buf_type) { |
5bafd765 SF |
147 | FILE_DIRECTORY_INFO *pfindData = (FILE_DIRECTORY_INFO *)buf; |
148 | ||
149 | attr = le32_to_cpu(pfindData->ExtFileAttributes); | |
150 | allocation_size = le64_to_cpu(pfindData->AllocationSize); | |
151 | end_of_file = le64_to_cpu(pfindData->EndOfFile); | |
152 | tmp_inode->i_atime = | |
153 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); | |
154 | tmp_inode->i_mtime = | |
155 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime)); | |
156 | tmp_inode->i_ctime = | |
157 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime)); | |
158 | } else { /* legacy, OS2 and DOS style */ | |
1bd5bbcb | 159 | /* struct timespec ts;*/ |
ad7a2926 | 160 | FIND_FILE_STANDARD_INFO *pfindData = |
5bafd765 SF |
161 | (FIND_FILE_STANDARD_INFO *)buf; |
162 | ||
268f3be1 | 163 | tmp_inode->i_mtime = cnvrtDosUnixTm( |
1bd5bbcb | 164 | le16_to_cpu(pfindData->LastWriteDate), |
268f3be1 SF |
165 | le16_to_cpu(pfindData->LastWriteTime)); |
166 | tmp_inode->i_atime = cnvrtDosUnixTm( | |
167 | le16_to_cpu(pfindData->LastAccessDate), | |
168 | le16_to_cpu(pfindData->LastAccessTime)); | |
a850790f SF |
169 | tmp_inode->i_ctime = cnvrtDosUnixTm( |
170 | le16_to_cpu(pfindData->LastWriteDate), | |
171 | le16_to_cpu(pfindData->LastWriteTime)); | |
533f90af | 172 | AdjustForTZ(cifs_sb->tcon, tmp_inode); |
5bafd765 SF |
173 | attr = le16_to_cpu(pfindData->Attributes); |
174 | allocation_size = le32_to_cpu(pfindData->AllocationSize); | |
175 | end_of_file = le32_to_cpu(pfindData->DataSize); | |
5bafd765 SF |
176 | } |
177 | ||
1da177e4 | 178 | /* Linux can not store file creation time unfortunately so ignore it */ |
5bafd765 SF |
179 | |
180 | cifsInfo->cifsAttrs = attr; | |
a6f8de3d SF |
181 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
182 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
183 | /* get more accurate mode via ACL - so force inode refresh */ | |
184 | cifsInfo->time = 0; | |
185 | } else | |
186 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
187 | cifsInfo->time = jiffies; | |
5bafd765 | 188 | |
1da177e4 LT |
189 | /* treat dos attribute of read-only as read-only mode bit e.g. 555? */ |
190 | /* 2767 perms - indicate mandatory locking */ | |
790fe579 | 191 | /* BB fill in uid and gid here? with help from winbind? |
1da177e4 LT |
192 | or retrieve from NTFS stream extended attribute */ |
193 | if (atomic_read(&cifsInfo->inUse) == 0) { | |
194 | tmp_inode->i_uid = cifs_sb->mnt_uid; | |
195 | tmp_inode->i_gid = cifs_sb->mnt_gid; | |
4468eb3f JL |
196 | } |
197 | ||
198 | if (attr & ATTR_DIRECTORY) | |
199 | default_mode = cifs_sb->mnt_dir_mode; | |
200 | else | |
201 | default_mode = cifs_sb->mnt_file_mode; | |
202 | ||
203 | /* set initial permissions */ | |
204 | if ((atomic_read(&cifsInfo->inUse) == 0) || | |
205 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) | |
206 | tmp_inode->i_mode = default_mode; | |
207 | else { | |
208 | /* just reenable write bits if !ATTR_READONLY */ | |
209 | if ((tmp_inode->i_mode & S_IWUGO) == 0 && | |
210 | (attr & ATTR_READONLY) == 0) | |
211 | tmp_inode->i_mode |= (S_IWUGO & default_mode); | |
212 | ||
3020a1f5 | 213 | tmp_inode->i_mode &= ~S_IFMT; |
1da177e4 LT |
214 | } |
215 | ||
4468eb3f JL |
216 | /* clear write bits if ATTR_READONLY is set */ |
217 | if (attr & ATTR_READONLY) | |
218 | tmp_inode->i_mode &= ~S_IWUGO; | |
219 | ||
220 | /* set inode type */ | |
221 | if ((attr & ATTR_SYSTEM) && | |
222 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) { | |
3020a1f5 | 223 | if (end_of_file == 0) { |
3020a1f5 | 224 | tmp_inode->i_mode |= S_IFIFO; |
4468eb3f | 225 | *pobject_type = DT_FIFO; |
3020a1f5 | 226 | } else { |
4468eb3f JL |
227 | /* |
228 | * trying to get the type can be slow, so just call | |
229 | * this a regular file for now, and mark for reval | |
230 | */ | |
790fe579 | 231 | tmp_inode->i_mode |= S_IFREG; |
4468eb3f | 232 | *pobject_type = DT_REG; |
790fe579 | 233 | cifsInfo->time = 0; |
3020a1f5 | 234 | } |
1da177e4 | 235 | } else { |
4468eb3f JL |
236 | if (attr & ATTR_DIRECTORY) { |
237 | tmp_inode->i_mode |= S_IFDIR; | |
238 | *pobject_type = DT_DIR; | |
239 | } else { | |
240 | tmp_inode->i_mode |= S_IFREG; | |
241 | *pobject_type = DT_REG; | |
242 | } | |
243 | } | |
1da177e4 LT |
244 | |
245 | /* can not fill in nlink here as in qpathinfo version and Unx search */ | |
ad7a2926 | 246 | if (atomic_read(&cifsInfo->inUse) == 0) |
1da177e4 | 247 | atomic_set(&cifsInfo->inUse, 1); |
1da177e4 | 248 | |
fbec9ab9 | 249 | cifsInfo->server_eof = end_of_file; |
3677db10 | 250 | spin_lock(&tmp_inode->i_lock); |
7ba52631 | 251 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { |
790fe579 | 252 | /* can not safely change the file size here if the |
1da177e4 LT |
253 | client is writing to it due to potential races */ |
254 | i_size_write(tmp_inode, end_of_file); | |
255 | ||
256 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
257 | /* for this calculation, even though the reported blocksize is larger */ | |
258 | tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9; | |
259 | } | |
3677db10 | 260 | spin_unlock(&tmp_inode->i_lock); |
1da177e4 LT |
261 | |
262 | if (allocation_size < end_of_file) | |
263 | cFYI(1, ("May be sparse file, allocation less than file size")); | |
ba52de12 | 264 | cFYI(1, ("File Size %ld and blocks %llu", |
5515eff8 | 265 | (unsigned long)tmp_inode->i_size, |
ba52de12 | 266 | (unsigned long long)tmp_inode->i_blocks)); |
1da177e4 | 267 | if (S_ISREG(tmp_inode->i_mode)) { |
966ca923 | 268 | cFYI(1, ("File inode")); |
1da177e4 | 269 | tmp_inode->i_op = &cifs_file_inode_ops; |
4523cc30 SF |
270 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
271 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
8b94bcb9 SF |
272 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; |
273 | else | |
274 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
4523cc30 | 275 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
8b94bcb9 | 276 | tmp_inode->i_fop = &cifs_file_nobrl_ops; |
1da177e4 LT |
277 | else |
278 | tmp_inode->i_fop = &cifs_file_ops; | |
f3f6ec4b | 279 | |
4523cc30 | 280 | if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
bfa0d75a | 281 | (cifs_sb->tcon->ses->server->maxBuf < |
273d81d6 DK |
282 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
283 | tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
284 | else | |
285 | tmp_inode->i_data.a_ops = &cifs_addr_ops; | |
286 | ||
4523cc30 | 287 | if (isNewInode) |
dfb7533b SF |
288 | return; /* No sense invalidating pages for new inode |
289 | since have not started caching readahead file | |
290 | data yet */ | |
966ca923 SF |
291 | |
292 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
293 | (local_size == tmp_inode->i_size)) { | |
294 | cFYI(1, ("inode exists but unchanged")); | |
295 | } else { | |
296 | /* file may have changed on server */ | |
297 | cFYI(1, ("invalidate inode, readdir detected change")); | |
298 | invalidate_remote_inode(tmp_inode); | |
299 | } | |
1da177e4 | 300 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
966ca923 | 301 | cFYI(1, ("Directory inode")); |
1da177e4 LT |
302 | tmp_inode->i_op = &cifs_dir_inode_ops; |
303 | tmp_inode->i_fop = &cifs_dir_ops; | |
304 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
966ca923 | 305 | cFYI(1, ("Symbolic Link inode")); |
1da177e4 LT |
306 | tmp_inode->i_op = &cifs_symlink_inode_ops; |
307 | } else { | |
966ca923 | 308 | cFYI(1, ("Init special inode")); |
1da177e4 LT |
309 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
310 | tmp_inode->i_rdev); | |
311 | } | |
312 | } | |
313 | ||
314 | static void unix_fill_in_inode(struct inode *tmp_inode, | |
2c2130e1 | 315 | FILE_UNIX_INFO *pfindData, unsigned int *pobject_type, int isNewInode) |
1da177e4 | 316 | { |
966ca923 SF |
317 | loff_t local_size; |
318 | struct timespec local_mtime; | |
319 | ||
1da177e4 LT |
320 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
321 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
322 | ||
323 | __u32 type = le32_to_cpu(pfindData->Type); | |
324 | __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes); | |
325 | __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile); | |
326 | cifsInfo->time = jiffies; | |
327 | atomic_inc(&cifsInfo->inUse); | |
328 | ||
966ca923 SF |
329 | /* save mtime and size */ |
330 | local_mtime = tmp_inode->i_mtime; | |
331 | local_size = tmp_inode->i_size; | |
332 | ||
1da177e4 LT |
333 | tmp_inode->i_atime = |
334 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); | |
335 | tmp_inode->i_mtime = | |
336 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime)); | |
337 | tmp_inode->i_ctime = | |
338 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange)); | |
339 | ||
340 | tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions); | |
3020a1f5 | 341 | /* since we set the inode type below we need to mask off type |
790fe579 SF |
342 | to avoid strange results if bits above were corrupt */ |
343 | tmp_inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
344 | if (type == UNIX_FILE) { |
345 | *pobject_type = DT_REG; | |
346 | tmp_inode->i_mode |= S_IFREG; | |
347 | } else if (type == UNIX_SYMLINK) { | |
348 | *pobject_type = DT_LNK; | |
349 | tmp_inode->i_mode |= S_IFLNK; | |
350 | } else if (type == UNIX_DIR) { | |
351 | *pobject_type = DT_DIR; | |
352 | tmp_inode->i_mode |= S_IFDIR; | |
353 | } else if (type == UNIX_CHARDEV) { | |
354 | *pobject_type = DT_CHR; | |
355 | tmp_inode->i_mode |= S_IFCHR; | |
356 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
357 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
358 | } else if (type == UNIX_BLOCKDEV) { | |
359 | *pobject_type = DT_BLK; | |
360 | tmp_inode->i_mode |= S_IFBLK; | |
361 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
362 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
363 | } else if (type == UNIX_FIFO) { | |
364 | *pobject_type = DT_FIFO; | |
365 | tmp_inode->i_mode |= S_IFIFO; | |
366 | } else if (type == UNIX_SOCKET) { | |
367 | *pobject_type = DT_SOCK; | |
368 | tmp_inode->i_mode |= S_IFSOCK; | |
3020a1f5 SF |
369 | } else { |
370 | /* safest to just call it a file */ | |
371 | *pobject_type = DT_REG; | |
372 | tmp_inode->i_mode |= S_IFREG; | |
790fe579 | 373 | cFYI(1, ("unknown inode type %d", type)); |
1da177e4 LT |
374 | } |
375 | ||
4523cc30 SF |
376 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
377 | tmp_inode->i_uid = cifs_sb->mnt_uid; | |
378 | else | |
379 | tmp_inode->i_uid = le64_to_cpu(pfindData->Uid); | |
380 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) | |
381 | tmp_inode->i_gid = cifs_sb->mnt_gid; | |
382 | else | |
383 | tmp_inode->i_gid = le64_to_cpu(pfindData->Gid); | |
1da177e4 LT |
384 | tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks); |
385 | ||
fbec9ab9 | 386 | cifsInfo->server_eof = end_of_file; |
3677db10 | 387 | spin_lock(&tmp_inode->i_lock); |
7ba52631 | 388 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { |
790fe579 | 389 | /* can not safely change the file size here if the |
1da177e4 | 390 | client is writing to it due to potential races */ |
7ba52631 | 391 | i_size_write(tmp_inode, end_of_file); |
1da177e4 LT |
392 | |
393 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
394 | /* for this calculation, not the real blocksize */ | |
395 | tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; | |
396 | } | |
3677db10 | 397 | spin_unlock(&tmp_inode->i_lock); |
1da177e4 LT |
398 | |
399 | if (S_ISREG(tmp_inode->i_mode)) { | |
400 | cFYI(1, ("File inode")); | |
401 | tmp_inode->i_op = &cifs_file_inode_ops; | |
f3f6ec4b | 402 | |
4523cc30 SF |
403 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
404 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
f3f6ec4b SF |
405 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; |
406 | else | |
407 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
4523cc30 | 408 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
f3f6ec4b | 409 | tmp_inode->i_fop = &cifs_file_nobrl_ops; |
1da177e4 LT |
410 | else |
411 | tmp_inode->i_fop = &cifs_file_ops; | |
f3f6ec4b | 412 | |
4523cc30 | 413 | if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
790fe579 | 414 | (cifs_sb->tcon->ses->server->maxBuf < |
273d81d6 DK |
415 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
416 | tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
417 | else | |
418 | tmp_inode->i_data.a_ops = &cifs_addr_ops; | |
966ca923 | 419 | |
4523cc30 | 420 | if (isNewInode) |
790fe579 SF |
421 | return; /* No sense invalidating pages for new inode |
422 | since we have not started caching readahead | |
423 | file data for it yet */ | |
966ca923 SF |
424 | |
425 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
426 | (local_size == tmp_inode->i_size)) { | |
427 | cFYI(1, ("inode exists but unchanged")); | |
428 | } else { | |
429 | /* file may have changed on server */ | |
430 | cFYI(1, ("invalidate inode, readdir detected change")); | |
431 | invalidate_remote_inode(tmp_inode); | |
432 | } | |
1da177e4 LT |
433 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
434 | cFYI(1, ("Directory inode")); | |
435 | tmp_inode->i_op = &cifs_dir_inode_ops; | |
436 | tmp_inode->i_fop = &cifs_dir_ops; | |
437 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
438 | cFYI(1, ("Symbolic Link inode")); | |
439 | tmp_inode->i_op = &cifs_symlink_inode_ops; | |
440 | /* tmp_inode->i_fop = *//* do not need to set to anything */ | |
441 | } else { | |
790fe579 | 442 | cFYI(1, ("Special inode")); |
1da177e4 LT |
443 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
444 | tmp_inode->i_rdev); | |
445 | } | |
446 | } | |
447 | ||
0e0d2cf3 SF |
448 | /* BB eventually need to add the following helper function to |
449 | resolve NT_STATUS_STOPPED_ON_SYMLINK return code when | |
450 | we try to do FindFirst on (NTFS) directory symlinks */ | |
451 | /* | |
452 | int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb, | |
453 | int xid) | |
454 | { | |
455 | __u16 fid; | |
456 | int len; | |
457 | int oplock = 0; | |
458 | int rc; | |
459 | struct cifsTconInfo *ptcon = cifs_sb->tcon; | |
460 | char *tmpbuffer; | |
461 | ||
462 | rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ, | |
463 | OPEN_REPARSE_POINT, &fid, &oplock, NULL, | |
464 | cifs_sb->local_nls, | |
465 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
466 | if (!rc) { | |
467 | tmpbuffer = kmalloc(maxpath); | |
468 | rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path, | |
469 | tmpbuffer, | |
470 | maxpath -1, | |
471 | fid, | |
472 | cifs_sb->local_nls); | |
473 | if (CIFSSMBClose(xid, ptcon, fid)) { | |
474 | cFYI(1, ("Error closing temporary reparsepoint open)")); | |
475 | } | |
476 | } | |
477 | } | |
478 | */ | |
479 | ||
1da177e4 LT |
480 | static int initiate_cifs_search(const int xid, struct file *file) |
481 | { | |
482 | int rc = 0; | |
3870253e SF |
483 | char *full_path; |
484 | struct cifsFileInfo *cifsFile; | |
1da177e4 LT |
485 | struct cifs_sb_info *cifs_sb; |
486 | struct cifsTconInfo *pTcon; | |
487 | ||
4523cc30 | 488 | if (file->private_data == NULL) { |
3870253e SF |
489 | file->private_data = |
490 | kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); | |
1da177e4 LT |
491 | } |
492 | ||
4523cc30 | 493 | if (file->private_data == NULL) |
1da177e4 | 494 | return -ENOMEM; |
1da177e4 | 495 | cifsFile = file->private_data; |
4b18f2a9 SF |
496 | cifsFile->invalidHandle = true; |
497 | cifsFile->srch_inf.endOfSearch = false; | |
1da177e4 | 498 | |
e6a00296 | 499 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
4523cc30 | 500 | if (cifs_sb == NULL) |
1da177e4 LT |
501 | return -EINVAL; |
502 | ||
503 | pTcon = cifs_sb->tcon; | |
4523cc30 | 504 | if (pTcon == NULL) |
1da177e4 LT |
505 | return -EINVAL; |
506 | ||
e6a00296 | 507 | full_path = build_path_from_dentry(file->f_path.dentry); |
1da177e4 | 508 | |
ad7a2926 | 509 | if (full_path == NULL) |
1da177e4 | 510 | return -ENOMEM; |
1da177e4 | 511 | |
966ca923 | 512 | cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos)); |
1da177e4 | 513 | |
75cf6bdc | 514 | ffirst_retry: |
1da177e4 | 515 | /* test for Unix extensions */ |
c18c842b SF |
516 | /* but now check for them on the share/mount not on the SMB session */ |
517 | /* if (pTcon->ses->capabilities & CAP_UNIX) { */ | |
ad7a2926 | 518 | if (pTcon->unix_ext) |
5bafd765 | 519 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX; |
ad7a2926 | 520 | else if ((pTcon->ses->capabilities & |
5bafd765 SF |
521 | (CAP_NT_SMBS | CAP_NT_FIND)) == 0) { |
522 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD; | |
1da177e4 LT |
523 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
524 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; | |
525 | } else /* not srvinos - BB fixme add check for backlevel? */ { | |
526 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
527 | } | |
528 | ||
3870253e | 529 | rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls, |
737b758c | 530 | &cifsFile->netfid, &cifsFile->srch_inf, |
3870253e | 531 | cifs_sb->mnt_cifs_flags & |
eafe8701 | 532 | CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); |
4523cc30 | 533 | if (rc == 0) |
4b18f2a9 | 534 | cifsFile->invalidHandle = false; |
0e0d2cf3 SF |
535 | /* BB add following call to handle readdir on new NTFS symlink errors |
536 | else if STATUS_STOPPED_ON_SYMLINK | |
537 | call get_symlink_reparse_path and retry with new path */ | |
538 | else if ((rc == -EOPNOTSUPP) && | |
75cf6bdc SF |
539 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
540 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; | |
541 | goto ffirst_retry; | |
542 | } | |
1da177e4 LT |
543 | kfree(full_path); |
544 | return rc; | |
545 | } | |
546 | ||
547 | /* return length of unicode string in bytes */ | |
548 | static int cifs_unicode_bytelen(char *str) | |
549 | { | |
550 | int len; | |
63d2583f | 551 | __le16 *ustr = (__le16 *)str; |
1da177e4 | 552 | |
3870253e | 553 | for (len = 0; len <= PATH_MAX; len++) { |
4523cc30 | 554 | if (ustr[len] == 0) |
1da177e4 LT |
555 | return len << 1; |
556 | } | |
790fe579 | 557 | cFYI(1, ("Unicode string longer than PATH_MAX found")); |
1da177e4 LT |
558 | return len << 1; |
559 | } | |
560 | ||
5bafd765 | 561 | static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level) |
1da177e4 | 562 | { |
3870253e | 563 | char *new_entry; |
ad7a2926 | 564 | FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry; |
1da177e4 | 565 | |
4523cc30 | 566 | if (level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 567 | FIND_FILE_STANDARD_INFO *pfData; |
5bafd765 SF |
568 | pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo; |
569 | ||
570 | new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) + | |
571 | pfData->FileNameLength; | |
572 | } else | |
573 | new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset); | |
790fe579 | 574 | cFYI(1, ("new entry %p old entry %p", new_entry, old_entry)); |
1da177e4 | 575 | /* validate that new_entry is not past end of SMB */ |
4523cc30 | 576 | if (new_entry >= end_of_smb) { |
09d1db5c SF |
577 | cERROR(1, |
578 | ("search entry %p began after end of SMB %p old entry %p", | |
3870253e | 579 | new_entry, end_of_smb, old_entry)); |
1da177e4 | 580 | return NULL; |
4523cc30 | 581 | } else if (((level == SMB_FIND_FILE_INFO_STANDARD) && |
3870253e SF |
582 | (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) |
583 | || ((level != SMB_FIND_FILE_INFO_STANDARD) && | |
5bafd765 | 584 | (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) { |
3870253e | 585 | cERROR(1, ("search entry %p extends after end of SMB %p", |
09d1db5c SF |
586 | new_entry, end_of_smb)); |
587 | return NULL; | |
3870253e | 588 | } else |
1da177e4 LT |
589 | return new_entry; |
590 | ||
591 | } | |
592 | ||
593 | #define UNICODE_DOT cpu_to_le16(0x2e) | |
594 | ||
595 | /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */ | |
596 | static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile) | |
597 | { | |
598 | int rc = 0; | |
3870253e SF |
599 | char *filename = NULL; |
600 | int len = 0; | |
1da177e4 | 601 | |
4523cc30 | 602 | if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) { |
ad7a2926 | 603 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; |
1da177e4 | 604 | filename = &pFindData->FileName[0]; |
4523cc30 | 605 | if (cfile->srch_inf.unicode) { |
1da177e4 LT |
606 | len = cifs_unicode_bytelen(filename); |
607 | } else { | |
608 | /* BB should we make this strnlen of PATH_MAX? */ | |
609 | len = strnlen(filename, 5); | |
610 | } | |
4523cc30 | 611 | } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) { |
ad7a2926 | 612 | FILE_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
613 | (FILE_DIRECTORY_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_FULL_DIRECTORY_INFO) { |
ad7a2926 | 618 | FILE_FULL_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
619 | (FILE_FULL_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 == |
5bafd765 | 623 | SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
ad7a2926 | 624 | SEARCH_ID_FULL_DIR_INFO *pFindData = |
1da177e4 LT |
625 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
626 | filename = &pFindData->FileName[0]; | |
627 | len = le32_to_cpu(pFindData->FileNameLength); | |
3870253e | 628 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 629 | SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
ad7a2926 | 630 | FILE_BOTH_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
631 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
632 | filename = &pFindData->FileName[0]; | |
633 | len = le32_to_cpu(pFindData->FileNameLength); | |
4523cc30 | 634 | } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 635 | FIND_FILE_STANDARD_INFO *pFindData = |
5bafd765 SF |
636 | (FIND_FILE_STANDARD_INFO *)current_entry; |
637 | filename = &pFindData->FileName[0]; | |
5ddaa683 | 638 | len = pFindData->FileNameLength; |
1da177e4 | 639 | } else { |
790fe579 SF |
640 | cFYI(1, ("Unknown findfirst level %d", |
641 | cfile->srch_inf.info_level)); | |
1da177e4 LT |
642 | } |
643 | ||
4523cc30 SF |
644 | if (filename) { |
645 | if (cfile->srch_inf.unicode) { | |
1da177e4 | 646 | __le16 *ufilename = (__le16 *)filename; |
4523cc30 | 647 | if (len == 2) { |
1da177e4 | 648 | /* check for . */ |
4523cc30 | 649 | if (ufilename[0] == UNICODE_DOT) |
1da177e4 | 650 | rc = 1; |
4523cc30 | 651 | } else if (len == 4) { |
1da177e4 | 652 | /* check for .. */ |
4523cc30 | 653 | if ((ufilename[0] == UNICODE_DOT) |
3870253e | 654 | && (ufilename[1] == UNICODE_DOT)) |
1da177e4 LT |
655 | rc = 2; |
656 | } | |
657 | } else /* ASCII */ { | |
4523cc30 | 658 | if (len == 1) { |
3870253e | 659 | if (filename[0] == '.') |
1da177e4 | 660 | rc = 1; |
4523cc30 | 661 | } else if (len == 2) { |
790fe579 | 662 | if ((filename[0] == '.') && (filename[1] == '.')) |
1da177e4 LT |
663 | rc = 2; |
664 | } | |
665 | } | |
666 | } | |
667 | ||
668 | return rc; | |
669 | } | |
670 | ||
eafe8701 SF |
671 | /* Check if directory that we are searching has changed so we can decide |
672 | whether we can use the cached search results from the previous search */ | |
3870253e | 673 | static int is_dir_changed(struct file *file) |
eafe8701 | 674 | { |
c33f8d32 CH |
675 | struct inode *inode = file->f_path.dentry->d_inode; |
676 | struct cifsInodeInfo *cifsInfo = CIFS_I(inode); | |
eafe8701 | 677 | |
c33f8d32 | 678 | if (cifsInfo->time == 0) |
eafe8701 SF |
679 | return 1; /* directory was changed, perhaps due to unlink */ |
680 | else | |
681 | return 0; | |
682 | ||
683 | } | |
684 | ||
0752f152 SF |
685 | static int cifs_save_resume_key(const char *current_entry, |
686 | struct cifsFileInfo *cifsFile) | |
687 | { | |
688 | int rc = 0; | |
689 | unsigned int len = 0; | |
690 | __u16 level; | |
691 | char *filename; | |
692 | ||
693 | if ((cifsFile == NULL) || (current_entry == NULL)) | |
694 | return -EINVAL; | |
695 | ||
696 | level = cifsFile->srch_inf.info_level; | |
697 | ||
698 | if (level == SMB_FIND_FILE_UNIX) { | |
699 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; | |
700 | ||
701 | filename = &pFindData->FileName[0]; | |
702 | if (cifsFile->srch_inf.unicode) { | |
703 | len = cifs_unicode_bytelen(filename); | |
704 | } else { | |
705 | /* BB should we make this strnlen of PATH_MAX? */ | |
706 | len = strnlen(filename, PATH_MAX); | |
707 | } | |
708 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; | |
709 | } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) { | |
710 | FILE_DIRECTORY_INFO *pFindData = | |
711 | (FILE_DIRECTORY_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_FULL_DIRECTORY_INFO) { | |
716 | FILE_FULL_DIRECTORY_INFO *pFindData = | |
717 | (FILE_FULL_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_ID_FULL_DIR_INFO) { | |
722 | SEARCH_ID_FULL_DIR_INFO *pFindData = | |
723 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
724 | filename = &pFindData->FileName[0]; | |
725 | len = le32_to_cpu(pFindData->FileNameLength); | |
726 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
727 | } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { | |
728 | FILE_BOTH_DIRECTORY_INFO *pFindData = | |
729 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
730 | filename = &pFindData->FileName[0]; | |
731 | len = le32_to_cpu(pFindData->FileNameLength); | |
732 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
733 | } else if (level == SMB_FIND_FILE_INFO_STANDARD) { | |
734 | FIND_FILE_STANDARD_INFO *pFindData = | |
735 | (FIND_FILE_STANDARD_INFO *)current_entry; | |
736 | filename = &pFindData->FileName[0]; | |
737 | /* one byte length, no name conversion */ | |
738 | len = (unsigned int)pFindData->FileNameLength; | |
739 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; | |
740 | } else { | |
741 | cFYI(1, ("Unknown findfirst level %d", level)); | |
742 | return -EINVAL; | |
743 | } | |
744 | cifsFile->srch_inf.resume_name_len = len; | |
745 | cifsFile->srch_inf.presume_name = filename; | |
746 | return rc; | |
747 | } | |
748 | ||
1da177e4 LT |
749 | /* find the corresponding entry in the search */ |
750 | /* Note that the SMB server returns search entries for . and .. which | |
751 | complicates logic here if we choose to parse for them and we do not | |
752 | assume that they are located in the findfirst return buffer.*/ | |
753 | /* We start counting in the buffer with entry 2 and increment for every | |
754 | entry (do not increment for . or .. entry) */ | |
755 | static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon, | |
3870253e | 756 | struct file *file, char **ppCurrentEntry, int *num_to_ret) |
1da177e4 LT |
757 | { |
758 | int rc = 0; | |
759 | int pos_in_buf = 0; | |
760 | loff_t first_entry_in_buffer; | |
761 | loff_t index_to_find = file->f_pos; | |
3870253e | 762 | struct cifsFileInfo *cifsFile = file->private_data; |
1da177e4 | 763 | /* check if index in the buffer */ |
50c2f753 | 764 | |
3870253e | 765 | if ((cifsFile == NULL) || (ppCurrentEntry == NULL) || |
eafe8701 | 766 | (num_to_ret == NULL)) |
1da177e4 | 767 | return -ENOENT; |
50c2f753 | 768 | |
1da177e4 | 769 | *ppCurrentEntry = NULL; |
3870253e SF |
770 | first_entry_in_buffer = |
771 | cifsFile->srch_inf.index_of_last_entry - | |
1da177e4 | 772 | cifsFile->srch_inf.entries_in_buffer; |
60808233 SF |
773 | |
774 | /* if first entry in buf is zero then is first buffer | |
775 | in search response data which means it is likely . and .. | |
776 | will be in this buffer, although some servers do not return | |
777 | . and .. for the root of a drive and for those we need | |
778 | to start two entries earlier */ | |
779 | ||
3979877e | 780 | dump_cifs_file_struct(file, "In fce "); |
3870253e SF |
781 | if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) && |
782 | is_dir_changed(file)) || | |
eafe8701 | 783 | (index_to_find < first_entry_in_buffer)) { |
1da177e4 | 784 | /* close and restart search */ |
790fe579 | 785 | cFYI(1, ("search backing up - close and restart search")); |
ddb4cbfc | 786 | write_lock(&GlobalSMBSeslock); |
77c57ec8 SF |
787 | if (!cifsFile->srch_inf.endOfSearch && |
788 | !cifsFile->invalidHandle) { | |
789 | cifsFile->invalidHandle = true; | |
ddb4cbfc | 790 | write_unlock(&GlobalSMBSeslock); |
77c57ec8 | 791 | CIFSFindClose(xid, pTcon, cifsFile->netfid); |
ddb4cbfc SF |
792 | } else |
793 | write_unlock(&GlobalSMBSeslock); | |
4523cc30 | 794 | if (cifsFile->srch_inf.ntwrk_buf_start) { |
790fe579 | 795 | cFYI(1, ("freeing SMB ff cache buf on search rewind")); |
4523cc30 | 796 | if (cifsFile->srch_inf.smallBuf) |
d47d7c1a SF |
797 | cifs_small_buf_release(cifsFile->srch_inf. |
798 | ntwrk_buf_start); | |
799 | else | |
800 | cifs_buf_release(cifsFile->srch_inf. | |
801 | ntwrk_buf_start); | |
76c510ad | 802 | cifsFile->srch_inf.ntwrk_buf_start = NULL; |
1da177e4 | 803 | } |
3870253e | 804 | rc = initiate_cifs_search(xid, file); |
4523cc30 | 805 | if (rc) { |
790fe579 SF |
806 | cFYI(1, ("error %d reinitiating a search on rewind", |
807 | rc)); | |
1da177e4 LT |
808 | return rc; |
809 | } | |
a364bc0b | 810 | cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile); |
1da177e4 LT |
811 | } |
812 | ||
3870253e | 813 | while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) && |
4b18f2a9 | 814 | (rc == 0) && !cifsFile->srch_inf.endOfSearch) { |
790fe579 | 815 | cFYI(1, ("calling findnext2")); |
3870253e | 816 | rc = CIFSFindNext(xid, pTcon, cifsFile->netfid, |
dfb7533b | 817 | &cifsFile->srch_inf); |
a364bc0b | 818 | cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile); |
4523cc30 | 819 | if (rc) |
1da177e4 LT |
820 | return -ENOENT; |
821 | } | |
4523cc30 | 822 | if (index_to_find < cifsFile->srch_inf.index_of_last_entry) { |
1da177e4 LT |
823 | /* we found the buffer that contains the entry */ |
824 | /* scan and find it */ | |
825 | int i; | |
3870253e SF |
826 | char *current_entry; |
827 | char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + | |
1da177e4 LT |
828 | smbCalcSize((struct smb_hdr *) |
829 | cifsFile->srch_inf.ntwrk_buf_start); | |
60808233 SF |
830 | |
831 | current_entry = cifsFile->srch_inf.srch_entries_start; | |
1da177e4 LT |
832 | first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry |
833 | - cifsFile->srch_inf.entries_in_buffer; | |
834 | pos_in_buf = index_to_find - first_entry_in_buffer; | |
790fe579 | 835 | cFYI(1, ("found entry - pos_in_buf %d", pos_in_buf)); |
5bafd765 | 836 | |
ad7a2926 | 837 | for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) { |
dfb7533b | 838 | /* go entry by entry figuring out which is first */ |
3870253e | 839 | current_entry = nxt_dir_entry(current_entry, end_of_smb, |
5bafd765 | 840 | cifsFile->srch_inf.info_level); |
1da177e4 | 841 | } |
790fe579 | 842 | if ((current_entry == NULL) && (i < pos_in_buf)) { |
1da177e4 | 843 | /* BB fixme - check if we should flag this error */ |
3870253e | 844 | cERROR(1, ("reached end of buf searching for pos in buf" |
1da177e4 | 845 | " %d index to find %lld rc %d", |
3870253e | 846 | pos_in_buf, index_to_find, rc)); |
1da177e4 LT |
847 | } |
848 | rc = 0; | |
849 | *ppCurrentEntry = current_entry; | |
850 | } else { | |
790fe579 | 851 | cFYI(1, ("index not in buffer - could not findnext into it")); |
1da177e4 LT |
852 | return 0; |
853 | } | |
854 | ||
790fe579 SF |
855 | if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) { |
856 | cFYI(1, ("can not return entries pos_in_buf beyond last")); | |
1da177e4 LT |
857 | *num_to_ret = 0; |
858 | } else | |
859 | *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf; | |
1da177e4 LT |
860 | |
861 | return rc; | |
862 | } | |
863 | ||
864 | /* inode num, inode type and filename returned */ | |
865 | static int cifs_get_name_from_search_buf(struct qstr *pqst, | |
866 | char *current_entry, __u16 level, unsigned int unicode, | |
18295796 | 867 | struct cifs_sb_info *cifs_sb, unsigned int max_len, __u64 *pinum) |
1da177e4 LT |
868 | { |
869 | int rc = 0; | |
870 | unsigned int len = 0; | |
3870253e SF |
871 | char *filename; |
872 | struct nls_table *nlt = cifs_sb->local_nls; | |
1da177e4 LT |
873 | |
874 | *pinum = 0; | |
875 | ||
790fe579 | 876 | if (level == SMB_FIND_FILE_UNIX) { |
3870253e | 877 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; |
1da177e4 LT |
878 | |
879 | filename = &pFindData->FileName[0]; | |
790fe579 | 880 | if (unicode) { |
1da177e4 LT |
881 | len = cifs_unicode_bytelen(filename); |
882 | } else { | |
883 | /* BB should we make this strnlen of PATH_MAX? */ | |
884 | len = strnlen(filename, PATH_MAX); | |
885 | } | |
886 | ||
85a6dac5 | 887 | *pinum = le64_to_cpu(pFindData->UniqueId); |
790fe579 | 888 | } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) { |
3870253e | 889 | FILE_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
890 | (FILE_DIRECTORY_INFO *)current_entry; |
891 | filename = &pFindData->FileName[0]; | |
892 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 893 | } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
3870253e | 894 | FILE_FULL_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
895 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
896 | filename = &pFindData->FileName[0]; | |
897 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 898 | } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
3870253e | 899 | SEARCH_ID_FULL_DIR_INFO *pFindData = |
1da177e4 LT |
900 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
901 | filename = &pFindData->FileName[0]; | |
902 | len = le32_to_cpu(pFindData->FileNameLength); | |
85a6dac5 | 903 | *pinum = le64_to_cpu(pFindData->UniqueId); |
790fe579 | 904 | } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
3870253e | 905 | FILE_BOTH_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
906 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
907 | filename = &pFindData->FileName[0]; | |
908 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 909 | } else if (level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 910 | FIND_FILE_STANDARD_INFO *pFindData = |
5bafd765 SF |
911 | (FIND_FILE_STANDARD_INFO *)current_entry; |
912 | filename = &pFindData->FileName[0]; | |
913 | /* one byte length, no name conversion */ | |
914 | len = (unsigned int)pFindData->FileNameLength; | |
1da177e4 | 915 | } else { |
790fe579 | 916 | cFYI(1, ("Unknown findfirst level %d", level)); |
1da177e4 LT |
917 | return -EINVAL; |
918 | } | |
5bafd765 | 919 | |
790fe579 | 920 | if (len > max_len) { |
3870253e | 921 | cERROR(1, ("bad search response length %d past smb end", len)); |
5bafd765 SF |
922 | return -EINVAL; |
923 | } | |
924 | ||
790fe579 | 925 | if (unicode) { |
f5884166 JL |
926 | pqst->len = cifs_from_ucs2((char *) pqst->name, |
927 | (__le16 *) filename, | |
18295796 JL |
928 | UNICODE_NAME_MAX, |
929 | min(len, max_len), nlt, | |
f5884166 JL |
930 | cifs_sb->mnt_cifs_flags & |
931 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
932 | } else { |
933 | pqst->name = filename; | |
934 | pqst->len = len; | |
935 | } | |
3870253e | 936 | pqst->hash = full_name_hash(pqst->name, pqst->len); |
790fe579 | 937 | /* cFYI(1, ("filldir on %s",pqst->name)); */ |
1da177e4 LT |
938 | return rc; |
939 | } | |
940 | ||
18295796 JL |
941 | static int cifs_filldir(char *pfindEntry, struct file *file, filldir_t filldir, |
942 | void *direntry, char *scratch_buf, unsigned int max_len) | |
1da177e4 LT |
943 | { |
944 | int rc = 0; | |
945 | struct qstr qstring; | |
3870253e | 946 | struct cifsFileInfo *pCifsF; |
2c2130e1 | 947 | unsigned int obj_type; |
950ec528 | 948 | __u64 inum; |
3870253e | 949 | struct cifs_sb_info *cifs_sb; |
1da177e4 LT |
950 | struct inode *tmp_inode; |
951 | struct dentry *tmp_dentry; | |
952 | ||
953 | /* get filename and len into qstring */ | |
954 | /* get dentry */ | |
955 | /* decide whether to create and populate ionde */ | |
790fe579 | 956 | if ((direntry == NULL) || (file == NULL)) |
1da177e4 LT |
957 | return -EINVAL; |
958 | ||
959 | pCifsF = file->private_data; | |
50c2f753 | 960 | |
790fe579 | 961 | if ((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL)) |
1da177e4 LT |
962 | return -ENOENT; |
963 | ||
3870253e | 964 | rc = cifs_entry_is_dot(pfindEntry, pCifsF); |
60808233 | 965 | /* skip . and .. since we added them first */ |
790fe579 | 966 | if (rc != 0) |
60808233 SF |
967 | return 0; |
968 | ||
e6a00296 | 969 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 LT |
970 | |
971 | qstring.name = scratch_buf; | |
3870253e | 972 | rc = cifs_get_name_from_search_buf(&qstring, pfindEntry, |
1da177e4 | 973 | pCifsF->srch_inf.info_level, |
3870253e | 974 | pCifsF->srch_inf.unicode, cifs_sb, |
5bafd765 | 975 | max_len, |
1da177e4 LT |
976 | &inum /* returned */); |
977 | ||
790fe579 | 978 | if (rc) |
1da177e4 LT |
979 | return rc; |
980 | ||
132ac7b7 JL |
981 | /* only these two infolevels return valid inode numbers */ |
982 | if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX || | |
983 | pCifsF->srch_inf.info_level == SMB_FIND_FILE_ID_FULL_DIR_INFO) | |
984 | rc = construct_dentry(&qstring, file, &tmp_inode, &tmp_dentry, | |
985 | &inum); | |
986 | else | |
987 | rc = construct_dentry(&qstring, file, &tmp_inode, &tmp_dentry, | |
988 | NULL); | |
989 | ||
790fe579 | 990 | if ((tmp_inode == NULL) || (tmp_dentry == NULL)) |
1da177e4 LT |
991 | return -ENOMEM; |
992 | ||
966ca923 SF |
993 | /* we pass in rc below, indicating whether it is a new inode, |
994 | so we can figure out whether to invalidate the inode cached | |
995 | data if the file has changed */ | |
790fe579 | 996 | if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) |
966ca923 | 997 | unix_fill_in_inode(tmp_inode, |
5bafd765 SF |
998 | (FILE_UNIX_INFO *)pfindEntry, |
999 | &obj_type, rc); | |
790fe579 | 1000 | else if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) |
5bafd765 SF |
1001 | fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */, |
1002 | pfindEntry, &obj_type, rc); | |
1003 | else | |
1004 | fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc); | |
b835bebe | 1005 | |
790fe579 | 1006 | if (rc) /* new inode - needs to be tied to dentry */ { |
b835bebe | 1007 | d_instantiate(tmp_dentry, tmp_inode); |
790fe579 | 1008 | if (rc == 2) |
b835bebe SF |
1009 | d_rehash(tmp_dentry); |
1010 | } | |
50c2f753 | 1011 | |
3870253e SF |
1012 | |
1013 | rc = filldir(direntry, qstring.name, qstring.len, file->f_pos, | |
1014 | tmp_inode->i_ino, obj_type); | |
790fe579 SF |
1015 | if (rc) { |
1016 | cFYI(1, ("filldir rc = %d", rc)); | |
7ca85ba7 SF |
1017 | /* we can not return filldir errors to the caller |
1018 | since they are "normal" when the stat blocksize | |
1019 | is too small - we return remapped error instead */ | |
1020 | rc = -EOVERFLOW; | |
1da177e4 LT |
1021 | } |
1022 | ||
1023 | dput(tmp_dentry); | |
1024 | return rc; | |
1025 | } | |
1026 | ||
1da177e4 LT |
1027 | |
1028 | int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) | |
1029 | { | |
1030 | int rc = 0; | |
3870253e | 1031 | int xid, i; |
1da177e4 LT |
1032 | struct cifs_sb_info *cifs_sb; |
1033 | struct cifsTconInfo *pTcon; | |
1034 | struct cifsFileInfo *cifsFile = NULL; | |
3870253e | 1035 | char *current_entry; |
1da177e4 | 1036 | int num_to_fill = 0; |
3870253e | 1037 | char *tmp_buf = NULL; |
50c2f753 | 1038 | char *end_of_smb; |
18295796 | 1039 | unsigned int max_len; |
1da177e4 LT |
1040 | |
1041 | xid = GetXid(); | |
1042 | ||
e6a00296 | 1043 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 | 1044 | pTcon = cifs_sb->tcon; |
790fe579 | 1045 | if (pTcon == NULL) |
1da177e4 LT |
1046 | return -EINVAL; |
1047 | ||
1da177e4 LT |
1048 | switch ((int) file->f_pos) { |
1049 | case 0: | |
60808233 | 1050 | if (filldir(direntry, ".", 1, file->f_pos, |
e6a00296 | 1051 | file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) { |
60808233 | 1052 | cERROR(1, ("Filldir for current dir failed")); |
1da177e4 LT |
1053 | rc = -ENOMEM; |
1054 | break; | |
1055 | } | |
60808233 | 1056 | file->f_pos++; |
1da177e4 | 1057 | case 1: |
60808233 | 1058 | if (filldir(direntry, "..", 2, file->f_pos, |
e6a00296 | 1059 | file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) { |
26a21b98 | 1060 | cERROR(1, ("Filldir for parent dir failed")); |
1da177e4 LT |
1061 | rc = -ENOMEM; |
1062 | break; | |
1063 | } | |
60808233 SF |
1064 | file->f_pos++; |
1065 | default: | |
3870253e SF |
1066 | /* 1) If search is active, |
1067 | is in current search buffer? | |
1da177e4 LT |
1068 | if it before then restart search |
1069 | if after then keep searching till find it */ | |
1070 | ||
790fe579 | 1071 | if (file->private_data == NULL) { |
3870253e | 1072 | rc = initiate_cifs_search(xid, file); |
790fe579 SF |
1073 | cFYI(1, ("initiate cifs search rc %d", rc)); |
1074 | if (rc) { | |
1da177e4 LT |
1075 | FreeXid(xid); |
1076 | return rc; | |
1077 | } | |
1078 | } | |
790fe579 | 1079 | if (file->private_data == NULL) { |
1da177e4 LT |
1080 | rc = -EINVAL; |
1081 | FreeXid(xid); | |
1082 | return rc; | |
1083 | } | |
1084 | cifsFile = file->private_data; | |
1085 | if (cifsFile->srch_inf.endOfSearch) { | |
790fe579 | 1086 | if (cifsFile->srch_inf.emptyDir) { |
1da177e4 LT |
1087 | cFYI(1, ("End of search, empty dir")); |
1088 | rc = 0; | |
1089 | break; | |
1090 | } | |
1091 | } /* else { | |
4b18f2a9 | 1092 | cifsFile->invalidHandle = true; |
1da177e4 | 1093 | CIFSFindClose(xid, pTcon, cifsFile->netfid); |
aaa9bbe0 | 1094 | } */ |
1da177e4 | 1095 | |
3870253e SF |
1096 | rc = find_cifs_entry(xid, pTcon, file, |
1097 | ¤t_entry, &num_to_fill); | |
790fe579 SF |
1098 | if (rc) { |
1099 | cFYI(1, ("fce error %d", rc)); | |
1da177e4 LT |
1100 | goto rddir2_exit; |
1101 | } else if (current_entry != NULL) { | |
790fe579 | 1102 | cFYI(1, ("entry %lld found", file->f_pos)); |
1da177e4 | 1103 | } else { |
790fe579 | 1104 | cFYI(1, ("could not find entry")); |
1da177e4 LT |
1105 | goto rddir2_exit; |
1106 | } | |
790fe579 SF |
1107 | cFYI(1, ("loop through %d times filling dir for net buf %p", |
1108 | num_to_fill, cifsFile->srch_inf.ntwrk_buf_start)); | |
5bafd765 SF |
1109 | max_len = smbCalcSize((struct smb_hdr *) |
1110 | cifsFile->srch_inf.ntwrk_buf_start); | |
1111 | end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len; | |
1112 | ||
f5884166 | 1113 | tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL); |
790fe579 SF |
1114 | for (i = 0; (i < num_to_fill) && (rc == 0); i++) { |
1115 | if (current_entry == NULL) { | |
1da177e4 | 1116 | /* evaluate whether this case is an error */ |
26f57364 | 1117 | cERROR(1, ("past SMB end, num to fill %d i %d", |
1da177e4 LT |
1118 | num_to_fill, i)); |
1119 | break; | |
1120 | } | |
60808233 SF |
1121 | /* if buggy server returns . and .. late do |
1122 | we want to check for that here? */ | |
5bafd765 SF |
1123 | rc = cifs_filldir(current_entry, file, |
1124 | filldir, direntry, tmp_buf, max_len); | |
790fe579 | 1125 | if (rc == -EOVERFLOW) { |
7ca85ba7 SF |
1126 | rc = 0; |
1127 | break; | |
1128 | } | |
1129 | ||
1da177e4 | 1130 | file->f_pos++; |
790fe579 | 1131 | if (file->f_pos == |
3979877e | 1132 | cifsFile->srch_inf.index_of_last_entry) { |
790fe579 SF |
1133 | cFYI(1, ("last entry in buf at pos %lld %s", |
1134 | file->f_pos, tmp_buf)); | |
1135 | cifs_save_resume_key(current_entry, cifsFile); | |
1da177e4 | 1136 | break; |
790fe579 SF |
1137 | } else |
1138 | current_entry = | |
5bafd765 SF |
1139 | nxt_dir_entry(current_entry, end_of_smb, |
1140 | cifsFile->srch_inf.info_level); | |
1da177e4 LT |
1141 | } |
1142 | kfree(tmp_buf); | |
1143 | break; | |
1144 | } /* end switch */ | |
1145 | ||
1146 | rddir2_exit: | |
1da177e4 LT |
1147 | FreeXid(xid); |
1148 | return rc; | |
1149 | } |