Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * fs/cifs/readdir.c | |
3 | * | |
4 | * Directory search handling | |
6dc0f87e | 5 | * |
3677db10 | 6 | * Copyright (C) International Business Machines Corp., 2004, 2007 |
1da177e4 LT |
7 | * Author(s): Steve French (sfrench@us.ibm.com) |
8 | * | |
9 | * This library is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU Lesser General Public License as published | |
11 | * by the Free Software Foundation; either version 2.1 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
17 | * the GNU Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public License | |
20 | * along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | #include <linux/fs.h> | |
273d81d6 | 24 | #include <linux/pagemap.h> |
1da177e4 | 25 | #include <linux/stat.h> |
1da177e4 LT |
26 | #include "cifspdu.h" |
27 | #include "cifsglob.h" | |
28 | #include "cifsproto.h" | |
29 | #include "cifs_unicode.h" | |
30 | #include "cifs_debug.h" | |
31 | #include "cifs_fs_sb.h" | |
32 | #include "cifsfs.h" | |
33 | ||
3979877e SF |
34 | #ifdef CONFIG_CIFS_DEBUG2 |
35 | static void dump_cifs_file_struct(struct file *file, char *label) | |
1da177e4 | 36 | { |
6dc0f87e | 37 | struct cifsFileInfo *cf; |
1da177e4 | 38 | |
4523cc30 | 39 | if (file) { |
1da177e4 | 40 | cf = file->private_data; |
4523cc30 | 41 | if (cf == NULL) { |
6dc0f87e | 42 | cFYI(1, ("empty cifs private file data")); |
1da177e4 LT |
43 | return; |
44 | } | |
4523cc30 | 45 | if (cf->invalidHandle) { |
6dc0f87e | 46 | cFYI(1, ("invalid handle")); |
1da177e4 | 47 | } |
4523cc30 | 48 | if (cf->srch_inf.endOfSearch) { |
6dc0f87e | 49 | cFYI(1, ("end of search")); |
1da177e4 | 50 | } |
4523cc30 | 51 | if (cf->srch_inf.emptyDir) { |
6dc0f87e | 52 | cFYI(1, ("empty dir")); |
1da177e4 LT |
53 | } |
54 | ||
55 | } | |
3979877e SF |
56 | } |
57 | #endif /* DEBUG2 */ | |
1da177e4 LT |
58 | |
59 | /* Returns one if new inode created (which therefore needs to be hashed) */ | |
60 | /* Might check in the future if inode number changed so we can rehash inode */ | |
61 | static int construct_dentry(struct qstr *qstring, struct file *file, | |
62 | struct inode **ptmp_inode, struct dentry **pnew_dentry) | |
63 | { | |
64 | struct dentry *tmp_dentry; | |
65 | struct cifs_sb_info *cifs_sb; | |
66 | struct cifsTconInfo *pTcon; | |
67 | int rc = 0; | |
68 | ||
966ca923 | 69 | cFYI(1, ("For %s", qstring->name)); |
e6a00296 | 70 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 LT |
71 | pTcon = cifs_sb->tcon; |
72 | ||
73 | qstring->hash = full_name_hash(qstring->name, qstring->len); | |
e6a00296 | 74 | tmp_dentry = d_lookup(file->f_path.dentry, qstring); |
1da177e4 | 75 | if (tmp_dentry) { |
6dc0f87e SF |
76 | cFYI(0, ("existing dentry with inode 0x%p", |
77 | tmp_dentry->d_inode)); | |
1da177e4 LT |
78 | *ptmp_inode = tmp_dentry->d_inode; |
79 | /* BB overwrite old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len??*/ | |
4523cc30 | 80 | if (*ptmp_inode == NULL) { |
e6a00296 | 81 | *ptmp_inode = new_inode(file->f_path.dentry->d_sb); |
4523cc30 | 82 | if (*ptmp_inode == NULL) |
1da177e4 LT |
83 | return rc; |
84 | rc = 1; | |
1da177e4 | 85 | } |
4523cc30 | 86 | if (file->f_path.dentry->d_sb->s_flags & MS_NOATIME) |
1b2b2126 | 87 | (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME; |
1da177e4 | 88 | } else { |
e6a00296 | 89 | tmp_dentry = d_alloc(file->f_path.dentry, qstring); |
4523cc30 | 90 | if (tmp_dentry == NULL) { |
6dc0f87e | 91 | cERROR(1, ("Failed allocating dentry")); |
1da177e4 LT |
92 | *ptmp_inode = NULL; |
93 | return rc; | |
94 | } | |
95 | ||
e6a00296 | 96 | *ptmp_inode = new_inode(file->f_path.dentry->d_sb); |
b92327fe SF |
97 | if (pTcon->nocase) |
98 | tmp_dentry->d_op = &cifs_ci_dentry_ops; | |
99 | else | |
100 | tmp_dentry->d_op = &cifs_dentry_ops; | |
4523cc30 | 101 | if (*ptmp_inode == NULL) |
1da177e4 | 102 | return rc; |
4523cc30 | 103 | if (file->f_path.dentry->d_sb->s_flags & MS_NOATIME) |
1b2b2126 | 104 | (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME; |
b835bebe | 105 | rc = 2; |
1da177e4 LT |
106 | } |
107 | ||
108 | tmp_dentry->d_time = jiffies; | |
109 | *pnew_dentry = tmp_dentry; | |
110 | return rc; | |
111 | } | |
112 | ||
790fe579 | 113 | static void AdjustForTZ(struct cifsTconInfo *tcon, struct inode *inode) |
533f90af | 114 | { |
4523cc30 | 115 | if ((tcon) && (tcon->ses) && (tcon->ses->server)) { |
ddae957d SF |
116 | inode->i_ctime.tv_sec += tcon->ses->server->timeAdj; |
117 | inode->i_mtime.tv_sec += tcon->ses->server->timeAdj; | |
118 | inode->i_atime.tv_sec += tcon->ses->server->timeAdj; | |
533f90af SF |
119 | } |
120 | return; | |
121 | } | |
122 | ||
123 | ||
5bafd765 | 124 | static void fill_in_inode(struct inode *tmp_inode, int new_buf_type, |
790fe579 | 125 | char *buf, int *pobject_type, int isNewInode) |
1da177e4 | 126 | { |
966ca923 SF |
127 | loff_t local_size; |
128 | struct timespec local_mtime; | |
129 | ||
1da177e4 LT |
130 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
131 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
5bafd765 SF |
132 | __u32 attr; |
133 | __u64 allocation_size; | |
134 | __u64 end_of_file; | |
1da177e4 | 135 | |
966ca923 SF |
136 | /* save mtime and size */ |
137 | local_mtime = tmp_inode->i_mtime; | |
138 | local_size = tmp_inode->i_size; | |
139 | ||
4523cc30 | 140 | if (new_buf_type) { |
5bafd765 SF |
141 | FILE_DIRECTORY_INFO *pfindData = (FILE_DIRECTORY_INFO *)buf; |
142 | ||
143 | attr = le32_to_cpu(pfindData->ExtFileAttributes); | |
144 | allocation_size = le64_to_cpu(pfindData->AllocationSize); | |
145 | end_of_file = le64_to_cpu(pfindData->EndOfFile); | |
146 | tmp_inode->i_atime = | |
147 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); | |
148 | tmp_inode->i_mtime = | |
149 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime)); | |
150 | tmp_inode->i_ctime = | |
151 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime)); | |
152 | } else { /* legacy, OS2 and DOS style */ | |
1bd5bbcb | 153 | /* struct timespec ts;*/ |
790fe579 | 154 | FIND_FILE_STANDARD_INFO * pfindData = |
5bafd765 SF |
155 | (FIND_FILE_STANDARD_INFO *)buf; |
156 | ||
268f3be1 | 157 | tmp_inode->i_mtime = cnvrtDosUnixTm( |
1bd5bbcb | 158 | le16_to_cpu(pfindData->LastWriteDate), |
268f3be1 SF |
159 | le16_to_cpu(pfindData->LastWriteTime)); |
160 | tmp_inode->i_atime = cnvrtDosUnixTm( | |
161 | le16_to_cpu(pfindData->LastAccessDate), | |
162 | le16_to_cpu(pfindData->LastAccessTime)); | |
a850790f SF |
163 | tmp_inode->i_ctime = cnvrtDosUnixTm( |
164 | le16_to_cpu(pfindData->LastWriteDate), | |
165 | le16_to_cpu(pfindData->LastWriteTime)); | |
533f90af | 166 | AdjustForTZ(cifs_sb->tcon, tmp_inode); |
5bafd765 SF |
167 | attr = le16_to_cpu(pfindData->Attributes); |
168 | allocation_size = le32_to_cpu(pfindData->AllocationSize); | |
169 | end_of_file = le32_to_cpu(pfindData->DataSize); | |
5bafd765 SF |
170 | } |
171 | ||
1da177e4 | 172 | /* Linux can not store file creation time unfortunately so ignore it */ |
5bafd765 SF |
173 | |
174 | cifsInfo->cifsAttrs = attr; | |
175 | cifsInfo->time = jiffies; | |
176 | ||
1da177e4 LT |
177 | /* treat dos attribute of read-only as read-only mode bit e.g. 555? */ |
178 | /* 2767 perms - indicate mandatory locking */ | |
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; | |
184 | /* set default mode. will override for dirs below */ | |
185 | tmp_inode->i_mode = cifs_sb->mnt_file_mode; | |
3020a1f5 SF |
186 | } else { |
187 | /* mask off the type bits since it gets set | |
188 | below and we do not want to get two type | |
189 | bits set */ | |
190 | tmp_inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
191 | } |
192 | ||
1da177e4 LT |
193 | if (attr & ATTR_DIRECTORY) { |
194 | *pobject_type = DT_DIR; | |
195 | /* override default perms since we do not lock dirs */ | |
4523cc30 | 196 | if (atomic_read(&cifsInfo->inUse) == 0) { |
1da177e4 LT |
197 | tmp_inode->i_mode = cifs_sb->mnt_dir_mode; |
198 | } | |
199 | tmp_inode->i_mode |= S_IFDIR; | |
790fe579 | 200 | } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && |
3020a1f5 SF |
201 | (attr & ATTR_SYSTEM)) { |
202 | if (end_of_file == 0) { | |
203 | *pobject_type = DT_FIFO; | |
204 | tmp_inode->i_mode |= S_IFIFO; | |
205 | } else { | |
206 | /* rather than get the type here, we mark the | |
207 | inode as needing revalidate and get the real type | |
208 | (blk vs chr vs. symlink) later ie in lookup */ | |
209 | *pobject_type = DT_REG; | |
790fe579 SF |
210 | tmp_inode->i_mode |= S_IFREG; |
211 | cifsInfo->time = 0; | |
3020a1f5 | 212 | } |
1da177e4 LT |
213 | /* we no longer mark these because we could not follow them */ |
214 | /* } else if (attr & ATTR_REPARSE) { | |
790fe579 SF |
215 | *pobject_type = DT_LNK; |
216 | tmp_inode->i_mode |= S_IFLNK; */ | |
1da177e4 LT |
217 | } else { |
218 | *pobject_type = DT_REG; | |
219 | tmp_inode->i_mode |= S_IFREG; | |
220 | if (attr & ATTR_READONLY) | |
221 | tmp_inode->i_mode &= ~(S_IWUGO); | |
f5c1e2ea AT |
222 | else if ((tmp_inode->i_mode & S_IWUGO) == 0) |
223 | /* the ATTR_READONLY flag may have been changed on */ | |
790fe579 | 224 | /* server -- set any w bits allowed by mnt_file_mode */ |
f5c1e2ea | 225 | tmp_inode->i_mode |= (S_IWUGO & cifs_sb->mnt_file_mode); |
1da177e4 LT |
226 | } /* could add code here - to validate if device or weird share type? */ |
227 | ||
228 | /* can not fill in nlink here as in qpathinfo version and Unx search */ | |
229 | if (atomic_read(&cifsInfo->inUse) == 0) { | |
230 | atomic_set(&cifsInfo->inUse, 1); | |
231 | } | |
232 | ||
3677db10 | 233 | spin_lock(&tmp_inode->i_lock); |
7ba52631 | 234 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { |
790fe579 | 235 | /* can not safely change the file size here if the |
1da177e4 LT |
236 | client is writing to it due to potential races */ |
237 | i_size_write(tmp_inode, end_of_file); | |
238 | ||
239 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
240 | /* for this calculation, even though the reported blocksize is larger */ | |
241 | tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9; | |
242 | } | |
3677db10 | 243 | spin_unlock(&tmp_inode->i_lock); |
1da177e4 LT |
244 | |
245 | if (allocation_size < end_of_file) | |
246 | cFYI(1, ("May be sparse file, allocation less than file size")); | |
ba52de12 | 247 | cFYI(1, ("File Size %ld and blocks %llu", |
5515eff8 | 248 | (unsigned long)tmp_inode->i_size, |
ba52de12 | 249 | (unsigned long long)tmp_inode->i_blocks)); |
1da177e4 | 250 | if (S_ISREG(tmp_inode->i_mode)) { |
966ca923 | 251 | cFYI(1, ("File inode")); |
1da177e4 | 252 | tmp_inode->i_op = &cifs_file_inode_ops; |
4523cc30 SF |
253 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
254 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
8b94bcb9 SF |
255 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; |
256 | else | |
257 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
258 | ||
4523cc30 | 259 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
8b94bcb9 | 260 | tmp_inode->i_fop = &cifs_file_nobrl_ops; |
1da177e4 LT |
261 | else |
262 | tmp_inode->i_fop = &cifs_file_ops; | |
f3f6ec4b | 263 | |
4523cc30 | 264 | if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
bfa0d75a | 265 | (cifs_sb->tcon->ses->server->maxBuf < |
273d81d6 DK |
266 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
267 | tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
268 | else | |
269 | tmp_inode->i_data.a_ops = &cifs_addr_ops; | |
270 | ||
4523cc30 | 271 | if (isNewInode) |
dfb7533b SF |
272 | return; /* No sense invalidating pages for new inode |
273 | since have not started caching readahead file | |
274 | data yet */ | |
966ca923 SF |
275 | |
276 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
277 | (local_size == tmp_inode->i_size)) { | |
278 | cFYI(1, ("inode exists but unchanged")); | |
279 | } else { | |
280 | /* file may have changed on server */ | |
281 | cFYI(1, ("invalidate inode, readdir detected change")); | |
282 | invalidate_remote_inode(tmp_inode); | |
283 | } | |
1da177e4 | 284 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
966ca923 | 285 | cFYI(1, ("Directory inode")); |
1da177e4 LT |
286 | tmp_inode->i_op = &cifs_dir_inode_ops; |
287 | tmp_inode->i_fop = &cifs_dir_ops; | |
288 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
966ca923 | 289 | cFYI(1, ("Symbolic Link inode")); |
1da177e4 LT |
290 | tmp_inode->i_op = &cifs_symlink_inode_ops; |
291 | } else { | |
966ca923 | 292 | cFYI(1, ("Init special inode")); |
1da177e4 LT |
293 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
294 | tmp_inode->i_rdev); | |
295 | } | |
296 | } | |
297 | ||
298 | static void unix_fill_in_inode(struct inode *tmp_inode, | |
966ca923 | 299 | FILE_UNIX_INFO *pfindData, int *pobject_type, int isNewInode) |
1da177e4 | 300 | { |
966ca923 SF |
301 | loff_t local_size; |
302 | struct timespec local_mtime; | |
303 | ||
1da177e4 LT |
304 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
305 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
306 | ||
307 | __u32 type = le32_to_cpu(pfindData->Type); | |
308 | __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes); | |
309 | __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile); | |
310 | cifsInfo->time = jiffies; | |
311 | atomic_inc(&cifsInfo->inUse); | |
312 | ||
966ca923 SF |
313 | /* save mtime and size */ |
314 | local_mtime = tmp_inode->i_mtime; | |
315 | local_size = tmp_inode->i_size; | |
316 | ||
1da177e4 LT |
317 | tmp_inode->i_atime = |
318 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); | |
319 | tmp_inode->i_mtime = | |
320 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime)); | |
321 | tmp_inode->i_ctime = | |
322 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange)); | |
323 | ||
324 | tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions); | |
3020a1f5 | 325 | /* since we set the inode type below we need to mask off type |
790fe579 SF |
326 | to avoid strange results if bits above were corrupt */ |
327 | tmp_inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
328 | if (type == UNIX_FILE) { |
329 | *pobject_type = DT_REG; | |
330 | tmp_inode->i_mode |= S_IFREG; | |
331 | } else if (type == UNIX_SYMLINK) { | |
332 | *pobject_type = DT_LNK; | |
333 | tmp_inode->i_mode |= S_IFLNK; | |
334 | } else if (type == UNIX_DIR) { | |
335 | *pobject_type = DT_DIR; | |
336 | tmp_inode->i_mode |= S_IFDIR; | |
337 | } else if (type == UNIX_CHARDEV) { | |
338 | *pobject_type = DT_CHR; | |
339 | tmp_inode->i_mode |= S_IFCHR; | |
340 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
341 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
342 | } else if (type == UNIX_BLOCKDEV) { | |
343 | *pobject_type = DT_BLK; | |
344 | tmp_inode->i_mode |= S_IFBLK; | |
345 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
346 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
347 | } else if (type == UNIX_FIFO) { | |
348 | *pobject_type = DT_FIFO; | |
349 | tmp_inode->i_mode |= S_IFIFO; | |
350 | } else if (type == UNIX_SOCKET) { | |
351 | *pobject_type = DT_SOCK; | |
352 | tmp_inode->i_mode |= S_IFSOCK; | |
3020a1f5 SF |
353 | } else { |
354 | /* safest to just call it a file */ | |
355 | *pobject_type = DT_REG; | |
356 | tmp_inode->i_mode |= S_IFREG; | |
790fe579 | 357 | cFYI(1, ("unknown inode type %d", type)); |
1da177e4 LT |
358 | } |
359 | ||
4523cc30 SF |
360 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
361 | tmp_inode->i_uid = cifs_sb->mnt_uid; | |
362 | else | |
363 | tmp_inode->i_uid = le64_to_cpu(pfindData->Uid); | |
364 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) | |
365 | tmp_inode->i_gid = cifs_sb->mnt_gid; | |
366 | else | |
367 | tmp_inode->i_gid = le64_to_cpu(pfindData->Gid); | |
1da177e4 LT |
368 | tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks); |
369 | ||
3677db10 | 370 | spin_lock(&tmp_inode->i_lock); |
7ba52631 | 371 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { |
790fe579 | 372 | /* can not safely change the file size here if the |
1da177e4 | 373 | client is writing to it due to potential races */ |
7ba52631 | 374 | i_size_write(tmp_inode, end_of_file); |
1da177e4 LT |
375 | |
376 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
377 | /* for this calculation, not the real blocksize */ | |
378 | tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; | |
379 | } | |
3677db10 | 380 | spin_unlock(&tmp_inode->i_lock); |
1da177e4 LT |
381 | |
382 | if (S_ISREG(tmp_inode->i_mode)) { | |
383 | cFYI(1, ("File inode")); | |
384 | tmp_inode->i_op = &cifs_file_inode_ops; | |
f3f6ec4b | 385 | |
4523cc30 SF |
386 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
387 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
f3f6ec4b SF |
388 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; |
389 | else | |
390 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
4523cc30 | 391 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
f3f6ec4b | 392 | tmp_inode->i_fop = &cifs_file_nobrl_ops; |
1da177e4 LT |
393 | else |
394 | tmp_inode->i_fop = &cifs_file_ops; | |
f3f6ec4b | 395 | |
4523cc30 | 396 | if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
790fe579 | 397 | (cifs_sb->tcon->ses->server->maxBuf < |
273d81d6 DK |
398 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
399 | tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
400 | else | |
401 | tmp_inode->i_data.a_ops = &cifs_addr_ops; | |
966ca923 | 402 | |
4523cc30 | 403 | if (isNewInode) |
790fe579 SF |
404 | return; /* No sense invalidating pages for new inode |
405 | since we have not started caching readahead | |
406 | file data for it yet */ | |
966ca923 SF |
407 | |
408 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
409 | (local_size == tmp_inode->i_size)) { | |
410 | cFYI(1, ("inode exists but unchanged")); | |
411 | } else { | |
412 | /* file may have changed on server */ | |
413 | cFYI(1, ("invalidate inode, readdir detected change")); | |
414 | invalidate_remote_inode(tmp_inode); | |
415 | } | |
1da177e4 LT |
416 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
417 | cFYI(1, ("Directory inode")); | |
418 | tmp_inode->i_op = &cifs_dir_inode_ops; | |
419 | tmp_inode->i_fop = &cifs_dir_ops; | |
420 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
421 | cFYI(1, ("Symbolic Link inode")); | |
422 | tmp_inode->i_op = &cifs_symlink_inode_ops; | |
423 | /* tmp_inode->i_fop = *//* do not need to set to anything */ | |
424 | } else { | |
790fe579 | 425 | cFYI(1, ("Special inode")); |
1da177e4 LT |
426 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
427 | tmp_inode->i_rdev); | |
428 | } | |
429 | } | |
430 | ||
431 | static int initiate_cifs_search(const int xid, struct file *file) | |
432 | { | |
433 | int rc = 0; | |
434 | char * full_path; | |
435 | struct cifsFileInfo * cifsFile; | |
436 | struct cifs_sb_info *cifs_sb; | |
437 | struct cifsTconInfo *pTcon; | |
438 | ||
4523cc30 | 439 | if (file->private_data == NULL) { |
1da177e4 | 440 | file->private_data = |
eaa33a9a | 441 | kzalloc(sizeof(struct cifsFileInfo),GFP_KERNEL); |
1da177e4 LT |
442 | } |
443 | ||
4523cc30 | 444 | if (file->private_data == NULL) |
1da177e4 | 445 | return -ENOMEM; |
1da177e4 LT |
446 | cifsFile = file->private_data; |
447 | cifsFile->invalidHandle = TRUE; | |
448 | cifsFile->srch_inf.endOfSearch = FALSE; | |
449 | ||
e6a00296 | 450 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
4523cc30 | 451 | if (cifs_sb == NULL) |
1da177e4 LT |
452 | return -EINVAL; |
453 | ||
454 | pTcon = cifs_sb->tcon; | |
4523cc30 | 455 | if (pTcon == NULL) |
1da177e4 LT |
456 | return -EINVAL; |
457 | ||
e6a00296 | 458 | full_path = build_path_from_dentry(file->f_path.dentry); |
1da177e4 | 459 | |
4523cc30 | 460 | if (full_path == NULL) { |
1da177e4 LT |
461 | return -ENOMEM; |
462 | } | |
463 | ||
966ca923 | 464 | cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos)); |
1da177e4 | 465 | |
75cf6bdc | 466 | ffirst_retry: |
1da177e4 LT |
467 | /* test for Unix extensions */ |
468 | if (pTcon->ses->capabilities & CAP_UNIX) { | |
5bafd765 SF |
469 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX; |
470 | } else if ((pTcon->ses->capabilities & | |
471 | (CAP_NT_SMBS | CAP_NT_FIND)) == 0) { | |
472 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD; | |
1da177e4 LT |
473 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
474 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; | |
475 | } else /* not srvinos - BB fixme add check for backlevel? */ { | |
476 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
477 | } | |
478 | ||
737b758c SF |
479 | rc = CIFSFindFirst(xid, pTcon,full_path,cifs_sb->local_nls, |
480 | &cifsFile->netfid, &cifsFile->srch_inf, | |
eafe8701 SF |
481 | cifs_sb->mnt_cifs_flags & |
482 | CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); | |
4523cc30 | 483 | if (rc == 0) |
1da177e4 | 484 | cifsFile->invalidHandle = FALSE; |
4523cc30 | 485 | if ((rc == -EOPNOTSUPP) && |
75cf6bdc SF |
486 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
487 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; | |
488 | goto ffirst_retry; | |
489 | } | |
1da177e4 LT |
490 | kfree(full_path); |
491 | return rc; | |
492 | } | |
493 | ||
494 | /* return length of unicode string in bytes */ | |
495 | static int cifs_unicode_bytelen(char *str) | |
496 | { | |
497 | int len; | |
498 | __le16 * ustr = (__le16 *)str; | |
499 | ||
500 | for(len=0;len <= PATH_MAX;len++) { | |
4523cc30 | 501 | if (ustr[len] == 0) |
1da177e4 LT |
502 | return len << 1; |
503 | } | |
790fe579 | 504 | cFYI(1, ("Unicode string longer than PATH_MAX found")); |
1da177e4 LT |
505 | return len << 1; |
506 | } | |
507 | ||
5bafd765 | 508 | static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level) |
1da177e4 LT |
509 | { |
510 | char * new_entry; | |
511 | FILE_DIRECTORY_INFO * pDirInfo = (FILE_DIRECTORY_INFO *)old_entry; | |
512 | ||
4523cc30 | 513 | if (level == SMB_FIND_FILE_INFO_STANDARD) { |
5bafd765 SF |
514 | FIND_FILE_STANDARD_INFO * pfData; |
515 | pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo; | |
516 | ||
517 | new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) + | |
518 | pfData->FileNameLength; | |
519 | } else | |
520 | new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset); | |
790fe579 | 521 | cFYI(1, ("new entry %p old entry %p", new_entry, old_entry)); |
1da177e4 | 522 | /* validate that new_entry is not past end of SMB */ |
4523cc30 | 523 | if (new_entry >= end_of_smb) { |
09d1db5c SF |
524 | cERROR(1, |
525 | ("search entry %p began after end of SMB %p old entry %p", | |
526 | new_entry, end_of_smb, old_entry)); | |
1da177e4 | 527 | return NULL; |
4523cc30 | 528 | } else if (((level == SMB_FIND_FILE_INFO_STANDARD) && |
5bafd765 SF |
529 | (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) || |
530 | ((level != SMB_FIND_FILE_INFO_STANDARD) && | |
531 | (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) { | |
09d1db5c SF |
532 | cERROR(1,("search entry %p extends after end of SMB %p", |
533 | new_entry, end_of_smb)); | |
534 | return NULL; | |
535 | } else | |
1da177e4 LT |
536 | return new_entry; |
537 | ||
538 | } | |
539 | ||
540 | #define UNICODE_DOT cpu_to_le16(0x2e) | |
541 | ||
542 | /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */ | |
543 | static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile) | |
544 | { | |
545 | int rc = 0; | |
546 | char * filename = NULL; | |
547 | int len = 0; | |
548 | ||
4523cc30 | 549 | if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) { |
1da177e4 LT |
550 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; |
551 | filename = &pFindData->FileName[0]; | |
4523cc30 | 552 | if (cfile->srch_inf.unicode) { |
1da177e4 LT |
553 | len = cifs_unicode_bytelen(filename); |
554 | } else { | |
555 | /* BB should we make this strnlen of PATH_MAX? */ | |
556 | len = strnlen(filename, 5); | |
557 | } | |
4523cc30 | 558 | } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) { |
1da177e4 LT |
559 | FILE_DIRECTORY_INFO * pFindData = |
560 | (FILE_DIRECTORY_INFO *)current_entry; | |
561 | filename = &pFindData->FileName[0]; | |
562 | len = le32_to_cpu(pFindData->FileNameLength); | |
4523cc30 | 563 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 564 | SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
1da177e4 LT |
565 | FILE_FULL_DIRECTORY_INFO * pFindData = |
566 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
567 | filename = &pFindData->FileName[0]; | |
568 | len = le32_to_cpu(pFindData->FileNameLength); | |
4523cc30 | 569 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 570 | SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
1da177e4 LT |
571 | SEARCH_ID_FULL_DIR_INFO * pFindData = |
572 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
573 | filename = &pFindData->FileName[0]; | |
574 | len = le32_to_cpu(pFindData->FileNameLength); | |
4523cc30 | 575 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 576 | SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
1da177e4 LT |
577 | FILE_BOTH_DIRECTORY_INFO * pFindData = |
578 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
579 | filename = &pFindData->FileName[0]; | |
580 | len = le32_to_cpu(pFindData->FileNameLength); | |
4523cc30 | 581 | } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) { |
5bafd765 SF |
582 | FIND_FILE_STANDARD_INFO * pFindData = |
583 | (FIND_FILE_STANDARD_INFO *)current_entry; | |
584 | filename = &pFindData->FileName[0]; | |
5ddaa683 | 585 | len = pFindData->FileNameLength; |
1da177e4 | 586 | } else { |
790fe579 SF |
587 | cFYI(1, ("Unknown findfirst level %d", |
588 | cfile->srch_inf.info_level)); | |
1da177e4 LT |
589 | } |
590 | ||
4523cc30 SF |
591 | if (filename) { |
592 | if (cfile->srch_inf.unicode) { | |
1da177e4 | 593 | __le16 *ufilename = (__le16 *)filename; |
4523cc30 | 594 | if (len == 2) { |
1da177e4 | 595 | /* check for . */ |
4523cc30 | 596 | if (ufilename[0] == UNICODE_DOT) |
1da177e4 | 597 | rc = 1; |
4523cc30 | 598 | } else if (len == 4) { |
1da177e4 | 599 | /* check for .. */ |
4523cc30 | 600 | if ((ufilename[0] == UNICODE_DOT) |
1da177e4 LT |
601 | &&(ufilename[1] == UNICODE_DOT)) |
602 | rc = 2; | |
603 | } | |
604 | } else /* ASCII */ { | |
4523cc30 SF |
605 | if (len == 1) { |
606 | if (filename[0] == '.') | |
1da177e4 | 607 | rc = 1; |
4523cc30 | 608 | } else if (len == 2) { |
790fe579 | 609 | if ((filename[0] == '.') && (filename[1] == '.')) |
1da177e4 LT |
610 | rc = 2; |
611 | } | |
612 | } | |
613 | } | |
614 | ||
615 | return rc; | |
616 | } | |
617 | ||
eafe8701 SF |
618 | /* Check if directory that we are searching has changed so we can decide |
619 | whether we can use the cached search results from the previous search */ | |
620 | static int is_dir_changed(struct file * file) | |
621 | { | |
c33f8d32 CH |
622 | struct inode *inode = file->f_path.dentry->d_inode; |
623 | struct cifsInodeInfo *cifsInfo = CIFS_I(inode); | |
eafe8701 | 624 | |
c33f8d32 | 625 | if (cifsInfo->time == 0) |
eafe8701 SF |
626 | return 1; /* directory was changed, perhaps due to unlink */ |
627 | else | |
628 | return 0; | |
629 | ||
630 | } | |
631 | ||
1da177e4 LT |
632 | /* find the corresponding entry in the search */ |
633 | /* Note that the SMB server returns search entries for . and .. which | |
634 | complicates logic here if we choose to parse for them and we do not | |
635 | assume that they are located in the findfirst return buffer.*/ | |
636 | /* We start counting in the buffer with entry 2 and increment for every | |
637 | entry (do not increment for . or .. entry) */ | |
638 | static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon, | |
639 | struct file *file, char **ppCurrentEntry, int *num_to_ret) | |
640 | { | |
641 | int rc = 0; | |
642 | int pos_in_buf = 0; | |
643 | loff_t first_entry_in_buffer; | |
644 | loff_t index_to_find = file->f_pos; | |
645 | struct cifsFileInfo * cifsFile = file->private_data; | |
646 | /* check if index in the buffer */ | |
647 | ||
4523cc30 | 648 | if ((cifsFile == NULL) || (ppCurrentEntry == NULL) || |
eafe8701 | 649 | (num_to_ret == NULL)) |
1da177e4 LT |
650 | return -ENOENT; |
651 | ||
652 | *ppCurrentEntry = NULL; | |
653 | first_entry_in_buffer = | |
654 | cifsFile->srch_inf.index_of_last_entry - | |
655 | cifsFile->srch_inf.entries_in_buffer; | |
60808233 SF |
656 | |
657 | /* if first entry in buf is zero then is first buffer | |
658 | in search response data which means it is likely . and .. | |
659 | will be in this buffer, although some servers do not return | |
660 | . and .. for the root of a drive and for those we need | |
661 | to start two entries earlier */ | |
662 | ||
3979877e SF |
663 | #ifdef CONFIG_CIFS_DEBUG2 |
664 | dump_cifs_file_struct(file, "In fce "); | |
665 | #endif | |
4523cc30 | 666 | if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) && |
eafe8701 SF |
667 | is_dir_changed(file)) || |
668 | (index_to_find < first_entry_in_buffer)) { | |
1da177e4 | 669 | /* close and restart search */ |
790fe579 | 670 | cFYI(1, ("search backing up - close and restart search")); |
1da177e4 LT |
671 | cifsFile->invalidHandle = TRUE; |
672 | CIFSFindClose(xid, pTcon, cifsFile->netfid); | |
673 | kfree(cifsFile->search_resume_name); | |
674 | cifsFile->search_resume_name = NULL; | |
4523cc30 | 675 | if (cifsFile->srch_inf.ntwrk_buf_start) { |
790fe579 | 676 | cFYI(1, ("freeing SMB ff cache buf on search rewind")); |
4523cc30 | 677 | if (cifsFile->srch_inf.smallBuf) |
d47d7c1a SF |
678 | cifs_small_buf_release(cifsFile->srch_inf. |
679 | ntwrk_buf_start); | |
680 | else | |
681 | cifs_buf_release(cifsFile->srch_inf. | |
682 | ntwrk_buf_start); | |
1da177e4 LT |
683 | } |
684 | rc = initiate_cifs_search(xid,file); | |
4523cc30 | 685 | if (rc) { |
790fe579 SF |
686 | cFYI(1, ("error %d reinitiating a search on rewind", |
687 | rc)); | |
1da177e4 LT |
688 | return rc; |
689 | } | |
690 | } | |
691 | ||
692 | while((index_to_find >= cifsFile->srch_inf.index_of_last_entry) && | |
693 | (rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)){ | |
790fe579 | 694 | cFYI(1, ("calling findnext2")); |
dfb7533b SF |
695 | rc = CIFSFindNext(xid,pTcon,cifsFile->netfid, |
696 | &cifsFile->srch_inf); | |
4523cc30 | 697 | if (rc) |
1da177e4 LT |
698 | return -ENOENT; |
699 | } | |
4523cc30 | 700 | if (index_to_find < cifsFile->srch_inf.index_of_last_entry) { |
1da177e4 LT |
701 | /* we found the buffer that contains the entry */ |
702 | /* scan and find it */ | |
703 | int i; | |
704 | char * current_entry; | |
705 | char * end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + | |
706 | smbCalcSize((struct smb_hdr *) | |
707 | cifsFile->srch_inf.ntwrk_buf_start); | |
60808233 SF |
708 | |
709 | current_entry = cifsFile->srch_inf.srch_entries_start; | |
1da177e4 LT |
710 | first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry |
711 | - cifsFile->srch_inf.entries_in_buffer; | |
712 | pos_in_buf = index_to_find - first_entry_in_buffer; | |
790fe579 | 713 | cFYI(1, ("found entry - pos_in_buf %d", pos_in_buf)); |
5bafd765 | 714 | |
1da177e4 | 715 | for(i=0;(i<(pos_in_buf)) && (current_entry != NULL);i++) { |
dfb7533b | 716 | /* go entry by entry figuring out which is first */ |
5bafd765 SF |
717 | current_entry = nxt_dir_entry(current_entry,end_of_smb, |
718 | cifsFile->srch_inf.info_level); | |
1da177e4 | 719 | } |
790fe579 | 720 | if ((current_entry == NULL) && (i < pos_in_buf)) { |
1da177e4 LT |
721 | /* BB fixme - check if we should flag this error */ |
722 | cERROR(1,("reached end of buf searching for pos in buf" | |
723 | " %d index to find %lld rc %d", | |
724 | pos_in_buf,index_to_find,rc)); | |
725 | } | |
726 | rc = 0; | |
727 | *ppCurrentEntry = current_entry; | |
728 | } else { | |
790fe579 | 729 | cFYI(1, ("index not in buffer - could not findnext into it")); |
1da177e4 LT |
730 | return 0; |
731 | } | |
732 | ||
790fe579 SF |
733 | if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) { |
734 | cFYI(1, ("can not return entries pos_in_buf beyond last")); | |
1da177e4 LT |
735 | *num_to_ret = 0; |
736 | } else | |
737 | *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf; | |
1da177e4 LT |
738 | |
739 | return rc; | |
740 | } | |
741 | ||
742 | /* inode num, inode type and filename returned */ | |
743 | static int cifs_get_name_from_search_buf(struct qstr *pqst, | |
744 | char *current_entry, __u16 level, unsigned int unicode, | |
5bafd765 | 745 | struct cifs_sb_info * cifs_sb, int max_len, ino_t *pinum) |
1da177e4 LT |
746 | { |
747 | int rc = 0; | |
748 | unsigned int len = 0; | |
749 | char * filename; | |
750 | struct nls_table * nlt = cifs_sb->local_nls; | |
751 | ||
752 | *pinum = 0; | |
753 | ||
790fe579 | 754 | if (level == SMB_FIND_FILE_UNIX) { |
1da177e4 LT |
755 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; |
756 | ||
757 | filename = &pFindData->FileName[0]; | |
790fe579 | 758 | if (unicode) { |
1da177e4 LT |
759 | len = cifs_unicode_bytelen(filename); |
760 | } else { | |
761 | /* BB should we make this strnlen of PATH_MAX? */ | |
762 | len = strnlen(filename, PATH_MAX); | |
763 | } | |
764 | ||
765 | /* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */ | |
790fe579 | 766 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) |
1da177e4 | 767 | *pinum = pFindData->UniqueId; |
790fe579 | 768 | } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) { |
1da177e4 LT |
769 | FILE_DIRECTORY_INFO * pFindData = |
770 | (FILE_DIRECTORY_INFO *)current_entry; | |
771 | filename = &pFindData->FileName[0]; | |
772 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 773 | } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
1da177e4 LT |
774 | FILE_FULL_DIRECTORY_INFO * pFindData = |
775 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
776 | filename = &pFindData->FileName[0]; | |
777 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 778 | } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
1da177e4 LT |
779 | SEARCH_ID_FULL_DIR_INFO * pFindData = |
780 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
781 | filename = &pFindData->FileName[0]; | |
782 | len = le32_to_cpu(pFindData->FileNameLength); | |
783 | *pinum = pFindData->UniqueId; | |
790fe579 | 784 | } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
1da177e4 LT |
785 | FILE_BOTH_DIRECTORY_INFO * pFindData = |
786 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
787 | filename = &pFindData->FileName[0]; | |
788 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 789 | } else if (level == SMB_FIND_FILE_INFO_STANDARD) { |
5bafd765 SF |
790 | FIND_FILE_STANDARD_INFO * pFindData = |
791 | (FIND_FILE_STANDARD_INFO *)current_entry; | |
792 | filename = &pFindData->FileName[0]; | |
793 | /* one byte length, no name conversion */ | |
794 | len = (unsigned int)pFindData->FileNameLength; | |
1da177e4 | 795 | } else { |
790fe579 | 796 | cFYI(1, ("Unknown findfirst level %d", level)); |
1da177e4 LT |
797 | return -EINVAL; |
798 | } | |
5bafd765 | 799 | |
790fe579 | 800 | if (len > max_len) { |
5bafd765 SF |
801 | cERROR(1,("bad search response length %d past smb end", len)); |
802 | return -EINVAL; | |
803 | } | |
804 | ||
790fe579 | 805 | if (unicode) { |
1da177e4 LT |
806 | /* BB fixme - test with long names */ |
807 | /* Note converted filename can be longer than in unicode */ | |
790fe579 | 808 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) |
6a0b4824 SF |
809 | pqst->len = cifs_convertUCSpath((char *)pqst->name, |
810 | (__le16 *)filename, len/2, nlt); | |
811 | else | |
6a0b4824 | 812 | pqst->len = cifs_strfromUCS_le((char *)pqst->name, |
e89dc920 | 813 | (__le16 *)filename,len/2,nlt); |
1da177e4 LT |
814 | } else { |
815 | pqst->name = filename; | |
816 | pqst->len = len; | |
817 | } | |
818 | pqst->hash = full_name_hash(pqst->name,pqst->len); | |
790fe579 | 819 | /* cFYI(1, ("filldir on %s",pqst->name)); */ |
1da177e4 LT |
820 | return rc; |
821 | } | |
822 | ||
823 | static int cifs_filldir(char *pfindEntry, struct file *file, | |
5bafd765 | 824 | filldir_t filldir, void *direntry, char *scratch_buf, int max_len) |
1da177e4 LT |
825 | { |
826 | int rc = 0; | |
827 | struct qstr qstring; | |
828 | struct cifsFileInfo * pCifsF; | |
829 | unsigned obj_type; | |
830 | ino_t inum; | |
831 | struct cifs_sb_info * cifs_sb; | |
832 | struct inode *tmp_inode; | |
833 | struct dentry *tmp_dentry; | |
834 | ||
835 | /* get filename and len into qstring */ | |
836 | /* get dentry */ | |
837 | /* decide whether to create and populate ionde */ | |
790fe579 | 838 | if ((direntry == NULL) || (file == NULL)) |
1da177e4 LT |
839 | return -EINVAL; |
840 | ||
841 | pCifsF = file->private_data; | |
842 | ||
790fe579 | 843 | if ((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL)) |
1da177e4 LT |
844 | return -ENOENT; |
845 | ||
b66ac3ea | 846 | rc = cifs_entry_is_dot(pfindEntry,pCifsF); |
60808233 | 847 | /* skip . and .. since we added them first */ |
790fe579 | 848 | if (rc != 0) |
60808233 SF |
849 | return 0; |
850 | ||
e6a00296 | 851 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 LT |
852 | |
853 | qstring.name = scratch_buf; | |
854 | rc = cifs_get_name_from_search_buf(&qstring,pfindEntry, | |
855 | pCifsF->srch_inf.info_level, | |
856 | pCifsF->srch_inf.unicode,cifs_sb, | |
5bafd765 | 857 | max_len, |
1da177e4 LT |
858 | &inum /* returned */); |
859 | ||
790fe579 | 860 | if (rc) |
1da177e4 LT |
861 | return rc; |
862 | ||
863 | rc = construct_dentry(&qstring,file,&tmp_inode, &tmp_dentry); | |
790fe579 | 864 | if ((tmp_inode == NULL) || (tmp_dentry == NULL)) |
1da177e4 LT |
865 | return -ENOMEM; |
866 | ||
790fe579 | 867 | if (rc) { |
1da177e4 | 868 | /* inode created, we need to hash it with right inode number */ |
790fe579 | 869 | if (inum != 0) { |
1da177e4 LT |
870 | /* BB fixme - hash the 2 32 quantities bits together if necessary BB */ |
871 | tmp_inode->i_ino = inum; | |
872 | } | |
873 | insert_inode_hash(tmp_inode); | |
874 | } | |
875 | ||
966ca923 SF |
876 | /* we pass in rc below, indicating whether it is a new inode, |
877 | so we can figure out whether to invalidate the inode cached | |
878 | data if the file has changed */ | |
790fe579 | 879 | if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) |
966ca923 | 880 | unix_fill_in_inode(tmp_inode, |
5bafd765 SF |
881 | (FILE_UNIX_INFO *)pfindEntry, |
882 | &obj_type, rc); | |
790fe579 | 883 | else if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) |
5bafd765 SF |
884 | fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */, |
885 | pfindEntry, &obj_type, rc); | |
886 | else | |
887 | fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc); | |
b835bebe | 888 | |
790fe579 | 889 | if (rc) /* new inode - needs to be tied to dentry */ { |
b835bebe | 890 | d_instantiate(tmp_dentry, tmp_inode); |
790fe579 | 891 | if (rc == 2) |
b835bebe SF |
892 | d_rehash(tmp_dentry); |
893 | } | |
5bafd765 | 894 | |
1da177e4 | 895 | |
dfb7533b SF |
896 | rc = filldir(direntry,qstring.name,qstring.len,file->f_pos, |
897 | tmp_inode->i_ino,obj_type); | |
790fe579 SF |
898 | if (rc) { |
899 | cFYI(1, ("filldir rc = %d", rc)); | |
7ca85ba7 SF |
900 | /* we can not return filldir errors to the caller |
901 | since they are "normal" when the stat blocksize | |
902 | is too small - we return remapped error instead */ | |
903 | rc = -EOVERFLOW; | |
1da177e4 LT |
904 | } |
905 | ||
906 | dput(tmp_dentry); | |
907 | return rc; | |
908 | } | |
909 | ||
910 | static int cifs_save_resume_key(const char *current_entry, | |
911 | struct cifsFileInfo *cifsFile) | |
912 | { | |
913 | int rc = 0; | |
914 | unsigned int len = 0; | |
915 | __u16 level; | |
916 | char * filename; | |
917 | ||
790fe579 | 918 | if ((cifsFile == NULL) || (current_entry == NULL)) |
1da177e4 LT |
919 | return -EINVAL; |
920 | ||
921 | level = cifsFile->srch_inf.info_level; | |
922 | ||
790fe579 | 923 | if (level == SMB_FIND_FILE_UNIX) { |
1da177e4 LT |
924 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; |
925 | ||
926 | filename = &pFindData->FileName[0]; | |
790fe579 | 927 | if (cifsFile->srch_inf.unicode) { |
1da177e4 LT |
928 | len = cifs_unicode_bytelen(filename); |
929 | } else { | |
930 | /* BB should we make this strnlen of PATH_MAX? */ | |
931 | len = strnlen(filename, PATH_MAX); | |
932 | } | |
933 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; | |
790fe579 | 934 | } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) { |
1da177e4 LT |
935 | FILE_DIRECTORY_INFO * pFindData = |
936 | (FILE_DIRECTORY_INFO *)current_entry; | |
937 | filename = &pFindData->FileName[0]; | |
938 | len = le32_to_cpu(pFindData->FileNameLength); | |
939 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
790fe579 | 940 | } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
1da177e4 LT |
941 | FILE_FULL_DIRECTORY_INFO * pFindData = |
942 | (FILE_FULL_DIRECTORY_INFO *)current_entry; | |
943 | filename = &pFindData->FileName[0]; | |
944 | len = le32_to_cpu(pFindData->FileNameLength); | |
945 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
790fe579 | 946 | } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
1da177e4 LT |
947 | SEARCH_ID_FULL_DIR_INFO * pFindData = |
948 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; | |
949 | filename = &pFindData->FileName[0]; | |
950 | len = le32_to_cpu(pFindData->FileNameLength); | |
951 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
790fe579 | 952 | } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
1da177e4 LT |
953 | FILE_BOTH_DIRECTORY_INFO * pFindData = |
954 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; | |
955 | filename = &pFindData->FileName[0]; | |
956 | len = le32_to_cpu(pFindData->FileNameLength); | |
957 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
790fe579 | 958 | } else if (level == SMB_FIND_FILE_INFO_STANDARD) { |
5bafd765 SF |
959 | FIND_FILE_STANDARD_INFO * pFindData = |
960 | (FIND_FILE_STANDARD_INFO *)current_entry; | |
961 | filename = &pFindData->FileName[0]; | |
962 | /* one byte length, no name conversion */ | |
963 | len = (unsigned int)pFindData->FileNameLength; | |
203cf2fc | 964 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; |
1da177e4 | 965 | } else { |
790fe579 | 966 | cFYI(1, ("Unknown findfirst level %d", level)); |
1da177e4 LT |
967 | return -EINVAL; |
968 | } | |
969 | cifsFile->srch_inf.resume_name_len = len; | |
970 | cifsFile->srch_inf.presume_name = filename; | |
971 | return rc; | |
972 | } | |
973 | ||
974 | int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) | |
975 | { | |
976 | int rc = 0; | |
977 | int xid,i; | |
978 | struct cifs_sb_info *cifs_sb; | |
979 | struct cifsTconInfo *pTcon; | |
980 | struct cifsFileInfo *cifsFile = NULL; | |
981 | char * current_entry; | |
982 | int num_to_fill = 0; | |
983 | char * tmp_buf = NULL; | |
984 | char * end_of_smb; | |
5bafd765 | 985 | int max_len; |
1da177e4 LT |
986 | |
987 | xid = GetXid(); | |
988 | ||
e6a00296 | 989 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 | 990 | pTcon = cifs_sb->tcon; |
790fe579 | 991 | if (pTcon == NULL) |
1da177e4 LT |
992 | return -EINVAL; |
993 | ||
1da177e4 LT |
994 | switch ((int) file->f_pos) { |
995 | case 0: | |
60808233 | 996 | if (filldir(direntry, ".", 1, file->f_pos, |
e6a00296 | 997 | file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) { |
60808233 | 998 | cERROR(1, ("Filldir for current dir failed")); |
1da177e4 LT |
999 | rc = -ENOMEM; |
1000 | break; | |
1001 | } | |
60808233 | 1002 | file->f_pos++; |
1da177e4 | 1003 | case 1: |
60808233 | 1004 | if (filldir(direntry, "..", 2, file->f_pos, |
e6a00296 | 1005 | file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) { |
26a21b98 | 1006 | cERROR(1, ("Filldir for parent dir failed")); |
1da177e4 LT |
1007 | rc = -ENOMEM; |
1008 | break; | |
1009 | } | |
60808233 SF |
1010 | file->f_pos++; |
1011 | default: | |
1da177e4 LT |
1012 | /* 1) If search is active, |
1013 | is in current search buffer? | |
1014 | if it before then restart search | |
1015 | if after then keep searching till find it */ | |
1016 | ||
790fe579 | 1017 | if (file->private_data == NULL) { |
1da177e4 | 1018 | rc = initiate_cifs_search(xid,file); |
790fe579 SF |
1019 | cFYI(1, ("initiate cifs search rc %d", rc)); |
1020 | if (rc) { | |
1da177e4 LT |
1021 | FreeXid(xid); |
1022 | return rc; | |
1023 | } | |
1024 | } | |
790fe579 | 1025 | if (file->private_data == NULL) { |
1da177e4 LT |
1026 | rc = -EINVAL; |
1027 | FreeXid(xid); | |
1028 | return rc; | |
1029 | } | |
1030 | cifsFile = file->private_data; | |
1031 | if (cifsFile->srch_inf.endOfSearch) { | |
790fe579 | 1032 | if (cifsFile->srch_inf.emptyDir) { |
1da177e4 LT |
1033 | cFYI(1, ("End of search, empty dir")); |
1034 | rc = 0; | |
1035 | break; | |
1036 | } | |
1037 | } /* else { | |
1038 | cifsFile->invalidHandle = TRUE; | |
1039 | CIFSFindClose(xid, pTcon, cifsFile->netfid); | |
1040 | } | |
1041 | kfree(cifsFile->search_resume_name); | |
1042 | cifsFile->search_resume_name = NULL; */ | |
1043 | ||
1da177e4 LT |
1044 | rc = find_cifs_entry(xid,pTcon, file, |
1045 | ¤t_entry,&num_to_fill); | |
790fe579 SF |
1046 | if (rc) { |
1047 | cFYI(1, ("fce error %d", rc)); | |
1da177e4 LT |
1048 | goto rddir2_exit; |
1049 | } else if (current_entry != NULL) { | |
790fe579 | 1050 | cFYI(1, ("entry %lld found", file->f_pos)); |
1da177e4 | 1051 | } else { |
790fe579 | 1052 | cFYI(1, ("could not find entry")); |
1da177e4 LT |
1053 | goto rddir2_exit; |
1054 | } | |
790fe579 SF |
1055 | cFYI(1, ("loop through %d times filling dir for net buf %p", |
1056 | num_to_fill, cifsFile->srch_inf.ntwrk_buf_start)); | |
5bafd765 SF |
1057 | max_len = smbCalcSize((struct smb_hdr *) |
1058 | cifsFile->srch_inf.ntwrk_buf_start); | |
1059 | end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len; | |
1060 | ||
6a0b4824 SF |
1061 | /* To be safe - for UCS to UTF-8 with strings loaded |
1062 | with the rare long characters alloc more to account for | |
1063 | such multibyte target UTF-8 characters. cifs_unicode.c, | |
1064 | which actually does the conversion, has the same limit */ | |
1065 | tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL); | |
790fe579 SF |
1066 | for (i = 0; (i < num_to_fill) && (rc == 0); i++) { |
1067 | if (current_entry == NULL) { | |
1da177e4 LT |
1068 | /* evaluate whether this case is an error */ |
1069 | cERROR(1,("past end of SMB num to fill %d i %d", | |
1070 | num_to_fill, i)); | |
1071 | break; | |
1072 | } | |
60808233 SF |
1073 | /* if buggy server returns . and .. late do |
1074 | we want to check for that here? */ | |
5bafd765 SF |
1075 | rc = cifs_filldir(current_entry, file, |
1076 | filldir, direntry, tmp_buf, max_len); | |
790fe579 | 1077 | if (rc == -EOVERFLOW) { |
7ca85ba7 SF |
1078 | rc = 0; |
1079 | break; | |
1080 | } | |
1081 | ||
1da177e4 | 1082 | file->f_pos++; |
790fe579 | 1083 | if (file->f_pos == |
3979877e | 1084 | cifsFile->srch_inf.index_of_last_entry) { |
790fe579 SF |
1085 | cFYI(1, ("last entry in buf at pos %lld %s", |
1086 | file->f_pos, tmp_buf)); | |
1087 | cifs_save_resume_key(current_entry, cifsFile); | |
1da177e4 | 1088 | break; |
790fe579 SF |
1089 | } else |
1090 | current_entry = | |
5bafd765 SF |
1091 | nxt_dir_entry(current_entry, end_of_smb, |
1092 | cifsFile->srch_inf.info_level); | |
1da177e4 LT |
1093 | } |
1094 | kfree(tmp_buf); | |
1095 | break; | |
1096 | } /* end switch */ | |
1097 | ||
1098 | rddir2_exit: | |
1da177e4 LT |
1099 | FreeXid(xid); |
1100 | return rc; | |
1101 | } |