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 | ||
3979877e SF |
34 | #ifdef CONFIG_CIFS_DEBUG2 |
35 | static void dump_cifs_file_struct(struct file *file, char *label) | |
1da177e4 | 36 | { |
6dc0f87e | 37 | struct cifsFileInfo *cf; |
1da177e4 | 38 | |
4523cc30 | 39 | if (file) { |
1da177e4 | 40 | cf = file->private_data; |
4523cc30 | 41 | if (cf == NULL) { |
6dc0f87e | 42 | cFYI(1, ("empty cifs private file data")); |
1da177e4 LT |
43 | return; |
44 | } | |
ad7a2926 | 45 | if (cf->invalidHandle) |
6dc0f87e | 46 | cFYI(1, ("invalid handle")); |
ad7a2926 | 47 | if (cf->srch_inf.endOfSearch) |
6dc0f87e | 48 | cFYI(1, ("end of search")); |
ad7a2926 | 49 | if (cf->srch_inf.emptyDir) |
6dc0f87e | 50 | cFYI(1, ("empty dir")); |
1da177e4 | 51 | } |
3979877e | 52 | } |
90c81e0b SF |
53 | #else |
54 | static inline void dump_cifs_file_struct(struct file *file, char *label) | |
55 | { | |
56 | } | |
3979877e | 57 | #endif /* DEBUG2 */ |
1da177e4 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) |
3870253e | 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, |
2c2130e1 | 125 | char *buf, unsigned 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;*/ |
ad7a2926 | 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; | |
a6f8de3d SF |
175 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
176 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
177 | /* get more accurate mode via ACL - so force inode refresh */ | |
178 | cifsInfo->time = 0; | |
179 | } else | |
180 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ | |
181 | cifsInfo->time = jiffies; | |
5bafd765 | 182 | |
1da177e4 LT |
183 | /* treat dos attribute of read-only as read-only mode bit e.g. 555? */ |
184 | /* 2767 perms - indicate mandatory locking */ | |
790fe579 | 185 | /* BB fill in uid and gid here? with help from winbind? |
1da177e4 LT |
186 | or retrieve from NTFS stream extended attribute */ |
187 | if (atomic_read(&cifsInfo->inUse) == 0) { | |
188 | tmp_inode->i_uid = cifs_sb->mnt_uid; | |
189 | tmp_inode->i_gid = cifs_sb->mnt_gid; | |
190 | /* set default mode. will override for dirs below */ | |
191 | tmp_inode->i_mode = cifs_sb->mnt_file_mode; | |
3020a1f5 SF |
192 | } else { |
193 | /* mask off the type bits since it gets set | |
194 | below and we do not want to get two type | |
195 | bits set */ | |
196 | tmp_inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
197 | } |
198 | ||
1da177e4 LT |
199 | if (attr & ATTR_DIRECTORY) { |
200 | *pobject_type = DT_DIR; | |
201 | /* override default perms since we do not lock dirs */ | |
ad7a2926 | 202 | if (atomic_read(&cifsInfo->inUse) == 0) |
1da177e4 | 203 | tmp_inode->i_mode = cifs_sb->mnt_dir_mode; |
1da177e4 | 204 | tmp_inode->i_mode |= S_IFDIR; |
790fe579 | 205 | } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && |
3020a1f5 SF |
206 | (attr & ATTR_SYSTEM)) { |
207 | if (end_of_file == 0) { | |
208 | *pobject_type = DT_FIFO; | |
209 | tmp_inode->i_mode |= S_IFIFO; | |
210 | } else { | |
211 | /* rather than get the type here, we mark the | |
212 | inode as needing revalidate and get the real type | |
213 | (blk vs chr vs. symlink) later ie in lookup */ | |
214 | *pobject_type = DT_REG; | |
790fe579 SF |
215 | tmp_inode->i_mode |= S_IFREG; |
216 | cifsInfo->time = 0; | |
3020a1f5 | 217 | } |
1da177e4 LT |
218 | /* we no longer mark these because we could not follow them */ |
219 | /* } else if (attr & ATTR_REPARSE) { | |
790fe579 SF |
220 | *pobject_type = DT_LNK; |
221 | tmp_inode->i_mode |= S_IFLNK; */ | |
1da177e4 LT |
222 | } else { |
223 | *pobject_type = DT_REG; | |
224 | tmp_inode->i_mode |= S_IFREG; | |
225 | if (attr & ATTR_READONLY) | |
226 | tmp_inode->i_mode &= ~(S_IWUGO); | |
f5c1e2ea AT |
227 | else if ((tmp_inode->i_mode & S_IWUGO) == 0) |
228 | /* the ATTR_READONLY flag may have been changed on */ | |
790fe579 | 229 | /* server -- set any w bits allowed by mnt_file_mode */ |
f5c1e2ea | 230 | tmp_inode->i_mode |= (S_IWUGO & cifs_sb->mnt_file_mode); |
1da177e4 LT |
231 | } /* could add code here - to validate if device or weird share type? */ |
232 | ||
233 | /* can not fill in nlink here as in qpathinfo version and Unx search */ | |
ad7a2926 | 234 | if (atomic_read(&cifsInfo->inUse) == 0) |
1da177e4 | 235 | atomic_set(&cifsInfo->inUse, 1); |
1da177e4 | 236 | |
3677db10 | 237 | spin_lock(&tmp_inode->i_lock); |
7ba52631 | 238 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { |
790fe579 | 239 | /* can not safely change the file size here if the |
1da177e4 LT |
240 | client is writing to it due to potential races */ |
241 | i_size_write(tmp_inode, end_of_file); | |
242 | ||
243 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
244 | /* for this calculation, even though the reported blocksize is larger */ | |
245 | tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9; | |
246 | } | |
3677db10 | 247 | spin_unlock(&tmp_inode->i_lock); |
1da177e4 LT |
248 | |
249 | if (allocation_size < end_of_file) | |
250 | cFYI(1, ("May be sparse file, allocation less than file size")); | |
ba52de12 | 251 | cFYI(1, ("File Size %ld and blocks %llu", |
5515eff8 | 252 | (unsigned long)tmp_inode->i_size, |
ba52de12 | 253 | (unsigned long long)tmp_inode->i_blocks)); |
1da177e4 | 254 | if (S_ISREG(tmp_inode->i_mode)) { |
966ca923 | 255 | cFYI(1, ("File inode")); |
1da177e4 | 256 | tmp_inode->i_op = &cifs_file_inode_ops; |
4523cc30 SF |
257 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
258 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
8b94bcb9 SF |
259 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; |
260 | else | |
261 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
4523cc30 | 262 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
8b94bcb9 | 263 | tmp_inode->i_fop = &cifs_file_nobrl_ops; |
1da177e4 LT |
264 | else |
265 | tmp_inode->i_fop = &cifs_file_ops; | |
f3f6ec4b | 266 | |
4523cc30 | 267 | if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
bfa0d75a | 268 | (cifs_sb->tcon->ses->server->maxBuf < |
273d81d6 DK |
269 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
270 | tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
271 | else | |
272 | tmp_inode->i_data.a_ops = &cifs_addr_ops; | |
273 | ||
4523cc30 | 274 | if (isNewInode) |
dfb7533b SF |
275 | return; /* No sense invalidating pages for new inode |
276 | since have not started caching readahead file | |
277 | data yet */ | |
966ca923 SF |
278 | |
279 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
280 | (local_size == tmp_inode->i_size)) { | |
281 | cFYI(1, ("inode exists but unchanged")); | |
282 | } else { | |
283 | /* file may have changed on server */ | |
284 | cFYI(1, ("invalidate inode, readdir detected change")); | |
285 | invalidate_remote_inode(tmp_inode); | |
286 | } | |
1da177e4 | 287 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
966ca923 | 288 | cFYI(1, ("Directory inode")); |
1da177e4 LT |
289 | tmp_inode->i_op = &cifs_dir_inode_ops; |
290 | tmp_inode->i_fop = &cifs_dir_ops; | |
291 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
966ca923 | 292 | cFYI(1, ("Symbolic Link inode")); |
1da177e4 LT |
293 | tmp_inode->i_op = &cifs_symlink_inode_ops; |
294 | } else { | |
966ca923 | 295 | cFYI(1, ("Init special inode")); |
1da177e4 LT |
296 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
297 | tmp_inode->i_rdev); | |
298 | } | |
299 | } | |
300 | ||
301 | static void unix_fill_in_inode(struct inode *tmp_inode, | |
2c2130e1 | 302 | FILE_UNIX_INFO *pfindData, unsigned int *pobject_type, int isNewInode) |
1da177e4 | 303 | { |
966ca923 SF |
304 | loff_t local_size; |
305 | struct timespec local_mtime; | |
306 | ||
1da177e4 LT |
307 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
308 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
309 | ||
310 | __u32 type = le32_to_cpu(pfindData->Type); | |
311 | __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes); | |
312 | __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile); | |
313 | cifsInfo->time = jiffies; | |
314 | atomic_inc(&cifsInfo->inUse); | |
315 | ||
966ca923 SF |
316 | /* save mtime and size */ |
317 | local_mtime = tmp_inode->i_mtime; | |
318 | local_size = tmp_inode->i_size; | |
319 | ||
1da177e4 LT |
320 | tmp_inode->i_atime = |
321 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); | |
322 | tmp_inode->i_mtime = | |
323 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime)); | |
324 | tmp_inode->i_ctime = | |
325 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange)); | |
326 | ||
327 | tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions); | |
3020a1f5 | 328 | /* since we set the inode type below we need to mask off type |
790fe579 SF |
329 | to avoid strange results if bits above were corrupt */ |
330 | tmp_inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
331 | if (type == UNIX_FILE) { |
332 | *pobject_type = DT_REG; | |
333 | tmp_inode->i_mode |= S_IFREG; | |
334 | } else if (type == UNIX_SYMLINK) { | |
335 | *pobject_type = DT_LNK; | |
336 | tmp_inode->i_mode |= S_IFLNK; | |
337 | } else if (type == UNIX_DIR) { | |
338 | *pobject_type = DT_DIR; | |
339 | tmp_inode->i_mode |= S_IFDIR; | |
340 | } else if (type == UNIX_CHARDEV) { | |
341 | *pobject_type = DT_CHR; | |
342 | tmp_inode->i_mode |= S_IFCHR; | |
343 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
344 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
345 | } else if (type == UNIX_BLOCKDEV) { | |
346 | *pobject_type = DT_BLK; | |
347 | tmp_inode->i_mode |= S_IFBLK; | |
348 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
349 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
350 | } else if (type == UNIX_FIFO) { | |
351 | *pobject_type = DT_FIFO; | |
352 | tmp_inode->i_mode |= S_IFIFO; | |
353 | } else if (type == UNIX_SOCKET) { | |
354 | *pobject_type = DT_SOCK; | |
355 | tmp_inode->i_mode |= S_IFSOCK; | |
3020a1f5 SF |
356 | } else { |
357 | /* safest to just call it a file */ | |
358 | *pobject_type = DT_REG; | |
359 | tmp_inode->i_mode |= S_IFREG; | |
790fe579 | 360 | cFYI(1, ("unknown inode type %d", type)); |
1da177e4 LT |
361 | } |
362 | ||
4523cc30 SF |
363 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
364 | tmp_inode->i_uid = cifs_sb->mnt_uid; | |
365 | else | |
366 | tmp_inode->i_uid = le64_to_cpu(pfindData->Uid); | |
367 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) | |
368 | tmp_inode->i_gid = cifs_sb->mnt_gid; | |
369 | else | |
370 | tmp_inode->i_gid = le64_to_cpu(pfindData->Gid); | |
1da177e4 LT |
371 | tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks); |
372 | ||
3677db10 | 373 | spin_lock(&tmp_inode->i_lock); |
7ba52631 | 374 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { |
790fe579 | 375 | /* can not safely change the file size here if the |
1da177e4 | 376 | client is writing to it due to potential races */ |
7ba52631 | 377 | i_size_write(tmp_inode, end_of_file); |
1da177e4 LT |
378 | |
379 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
380 | /* for this calculation, not the real blocksize */ | |
381 | tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; | |
382 | } | |
3677db10 | 383 | spin_unlock(&tmp_inode->i_lock); |
1da177e4 LT |
384 | |
385 | if (S_ISREG(tmp_inode->i_mode)) { | |
386 | cFYI(1, ("File inode")); | |
387 | tmp_inode->i_op = &cifs_file_inode_ops; | |
f3f6ec4b | 388 | |
4523cc30 SF |
389 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
390 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
f3f6ec4b SF |
391 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; |
392 | else | |
393 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
4523cc30 | 394 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
f3f6ec4b | 395 | tmp_inode->i_fop = &cifs_file_nobrl_ops; |
1da177e4 LT |
396 | else |
397 | tmp_inode->i_fop = &cifs_file_ops; | |
f3f6ec4b | 398 | |
4523cc30 | 399 | if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
790fe579 | 400 | (cifs_sb->tcon->ses->server->maxBuf < |
273d81d6 DK |
401 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
402 | tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
403 | else | |
404 | tmp_inode->i_data.a_ops = &cifs_addr_ops; | |
966ca923 | 405 | |
4523cc30 | 406 | if (isNewInode) |
790fe579 SF |
407 | return; /* No sense invalidating pages for new inode |
408 | since we have not started caching readahead | |
409 | file data for it yet */ | |
966ca923 SF |
410 | |
411 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
412 | (local_size == tmp_inode->i_size)) { | |
413 | cFYI(1, ("inode exists but unchanged")); | |
414 | } else { | |
415 | /* file may have changed on server */ | |
416 | cFYI(1, ("invalidate inode, readdir detected change")); | |
417 | invalidate_remote_inode(tmp_inode); | |
418 | } | |
1da177e4 LT |
419 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
420 | cFYI(1, ("Directory inode")); | |
421 | tmp_inode->i_op = &cifs_dir_inode_ops; | |
422 | tmp_inode->i_fop = &cifs_dir_ops; | |
423 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
424 | cFYI(1, ("Symbolic Link inode")); | |
425 | tmp_inode->i_op = &cifs_symlink_inode_ops; | |
426 | /* tmp_inode->i_fop = *//* do not need to set to anything */ | |
427 | } else { | |
790fe579 | 428 | cFYI(1, ("Special inode")); |
1da177e4 LT |
429 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
430 | tmp_inode->i_rdev); | |
431 | } | |
432 | } | |
433 | ||
434 | static int initiate_cifs_search(const int xid, struct file *file) | |
435 | { | |
436 | int rc = 0; | |
3870253e SF |
437 | char *full_path; |
438 | struct cifsFileInfo *cifsFile; | |
1da177e4 LT |
439 | struct cifs_sb_info *cifs_sb; |
440 | struct cifsTconInfo *pTcon; | |
441 | ||
4523cc30 | 442 | if (file->private_data == NULL) { |
3870253e SF |
443 | file->private_data = |
444 | kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); | |
1da177e4 LT |
445 | } |
446 | ||
4523cc30 | 447 | if (file->private_data == NULL) |
1da177e4 | 448 | return -ENOMEM; |
1da177e4 | 449 | cifsFile = file->private_data; |
4b18f2a9 SF |
450 | cifsFile->invalidHandle = true; |
451 | cifsFile->srch_inf.endOfSearch = false; | |
1da177e4 | 452 | |
e6a00296 | 453 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
4523cc30 | 454 | if (cifs_sb == NULL) |
1da177e4 LT |
455 | return -EINVAL; |
456 | ||
457 | pTcon = cifs_sb->tcon; | |
4523cc30 | 458 | if (pTcon == NULL) |
1da177e4 LT |
459 | return -EINVAL; |
460 | ||
e6a00296 | 461 | full_path = build_path_from_dentry(file->f_path.dentry); |
1da177e4 | 462 | |
ad7a2926 | 463 | if (full_path == NULL) |
1da177e4 | 464 | return -ENOMEM; |
1da177e4 | 465 | |
966ca923 | 466 | cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos)); |
1da177e4 | 467 | |
75cf6bdc | 468 | ffirst_retry: |
1da177e4 | 469 | /* test for Unix extensions */ |
c18c842b SF |
470 | /* but now check for them on the share/mount not on the SMB session */ |
471 | /* if (pTcon->ses->capabilities & CAP_UNIX) { */ | |
ad7a2926 | 472 | if (pTcon->unix_ext) |
5bafd765 | 473 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX; |
ad7a2926 | 474 | else if ((pTcon->ses->capabilities & |
5bafd765 SF |
475 | (CAP_NT_SMBS | CAP_NT_FIND)) == 0) { |
476 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD; | |
1da177e4 LT |
477 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
478 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; | |
479 | } else /* not srvinos - BB fixme add check for backlevel? */ { | |
480 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
481 | } | |
482 | ||
3870253e | 483 | rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls, |
737b758c | 484 | &cifsFile->netfid, &cifsFile->srch_inf, |
3870253e | 485 | cifs_sb->mnt_cifs_flags & |
eafe8701 | 486 | CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); |
4523cc30 | 487 | if (rc == 0) |
4b18f2a9 | 488 | cifsFile->invalidHandle = false; |
3870253e | 489 | if ((rc == -EOPNOTSUPP) && |
75cf6bdc SF |
490 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
491 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; | |
492 | goto ffirst_retry; | |
493 | } | |
1da177e4 LT |
494 | kfree(full_path); |
495 | return rc; | |
496 | } | |
497 | ||
498 | /* return length of unicode string in bytes */ | |
499 | static int cifs_unicode_bytelen(char *str) | |
500 | { | |
501 | int len; | |
63d2583f | 502 | __le16 *ustr = (__le16 *)str; |
1da177e4 | 503 | |
3870253e | 504 | for (len = 0; len <= PATH_MAX; len++) { |
4523cc30 | 505 | if (ustr[len] == 0) |
1da177e4 LT |
506 | return len << 1; |
507 | } | |
790fe579 | 508 | cFYI(1, ("Unicode string longer than PATH_MAX found")); |
1da177e4 LT |
509 | return len << 1; |
510 | } | |
511 | ||
5bafd765 | 512 | static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level) |
1da177e4 | 513 | { |
3870253e | 514 | char *new_entry; |
ad7a2926 | 515 | FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry; |
1da177e4 | 516 | |
4523cc30 | 517 | if (level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 518 | FIND_FILE_STANDARD_INFO *pfData; |
5bafd765 SF |
519 | pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo; |
520 | ||
521 | new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) + | |
522 | pfData->FileNameLength; | |
523 | } else | |
524 | new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset); | |
790fe579 | 525 | cFYI(1, ("new entry %p old entry %p", new_entry, old_entry)); |
1da177e4 | 526 | /* validate that new_entry is not past end of SMB */ |
4523cc30 | 527 | if (new_entry >= end_of_smb) { |
09d1db5c SF |
528 | cERROR(1, |
529 | ("search entry %p began after end of SMB %p old entry %p", | |
3870253e | 530 | new_entry, end_of_smb, old_entry)); |
1da177e4 | 531 | return NULL; |
4523cc30 | 532 | } else if (((level == SMB_FIND_FILE_INFO_STANDARD) && |
3870253e SF |
533 | (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) |
534 | || ((level != SMB_FIND_FILE_INFO_STANDARD) && | |
5bafd765 | 535 | (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) { |
3870253e | 536 | cERROR(1, ("search entry %p extends after end of SMB %p", |
09d1db5c SF |
537 | new_entry, end_of_smb)); |
538 | return NULL; | |
3870253e | 539 | } else |
1da177e4 LT |
540 | return new_entry; |
541 | ||
542 | } | |
543 | ||
544 | #define UNICODE_DOT cpu_to_le16(0x2e) | |
545 | ||
546 | /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */ | |
547 | static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile) | |
548 | { | |
549 | int rc = 0; | |
3870253e SF |
550 | char *filename = NULL; |
551 | int len = 0; | |
1da177e4 | 552 | |
4523cc30 | 553 | if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) { |
ad7a2926 | 554 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; |
1da177e4 | 555 | filename = &pFindData->FileName[0]; |
4523cc30 | 556 | if (cfile->srch_inf.unicode) { |
1da177e4 LT |
557 | len = cifs_unicode_bytelen(filename); |
558 | } else { | |
559 | /* BB should we make this strnlen of PATH_MAX? */ | |
560 | len = strnlen(filename, 5); | |
561 | } | |
4523cc30 | 562 | } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) { |
ad7a2926 | 563 | FILE_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
564 | (FILE_DIRECTORY_INFO *)current_entry; |
565 | filename = &pFindData->FileName[0]; | |
566 | len = le32_to_cpu(pFindData->FileNameLength); | |
3870253e | 567 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 568 | SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
ad7a2926 | 569 | FILE_FULL_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
570 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
571 | filename = &pFindData->FileName[0]; | |
572 | len = le32_to_cpu(pFindData->FileNameLength); | |
4523cc30 | 573 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 574 | SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
ad7a2926 | 575 | SEARCH_ID_FULL_DIR_INFO *pFindData = |
1da177e4 LT |
576 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
577 | filename = &pFindData->FileName[0]; | |
578 | len = le32_to_cpu(pFindData->FileNameLength); | |
3870253e | 579 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 580 | SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
ad7a2926 | 581 | FILE_BOTH_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
582 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
583 | filename = &pFindData->FileName[0]; | |
584 | len = le32_to_cpu(pFindData->FileNameLength); | |
4523cc30 | 585 | } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 586 | FIND_FILE_STANDARD_INFO *pFindData = |
5bafd765 SF |
587 | (FIND_FILE_STANDARD_INFO *)current_entry; |
588 | filename = &pFindData->FileName[0]; | |
5ddaa683 | 589 | len = pFindData->FileNameLength; |
1da177e4 | 590 | } else { |
790fe579 SF |
591 | cFYI(1, ("Unknown findfirst level %d", |
592 | cfile->srch_inf.info_level)); | |
1da177e4 LT |
593 | } |
594 | ||
4523cc30 SF |
595 | if (filename) { |
596 | if (cfile->srch_inf.unicode) { | |
1da177e4 | 597 | __le16 *ufilename = (__le16 *)filename; |
4523cc30 | 598 | if (len == 2) { |
1da177e4 | 599 | /* check for . */ |
4523cc30 | 600 | if (ufilename[0] == UNICODE_DOT) |
1da177e4 | 601 | rc = 1; |
4523cc30 | 602 | } else if (len == 4) { |
1da177e4 | 603 | /* check for .. */ |
4523cc30 | 604 | if ((ufilename[0] == UNICODE_DOT) |
3870253e | 605 | && (ufilename[1] == UNICODE_DOT)) |
1da177e4 LT |
606 | rc = 2; |
607 | } | |
608 | } else /* ASCII */ { | |
4523cc30 | 609 | if (len == 1) { |
3870253e | 610 | if (filename[0] == '.') |
1da177e4 | 611 | rc = 1; |
4523cc30 | 612 | } else if (len == 2) { |
790fe579 | 613 | if ((filename[0] == '.') && (filename[1] == '.')) |
1da177e4 LT |
614 | rc = 2; |
615 | } | |
616 | } | |
617 | } | |
618 | ||
619 | return rc; | |
620 | } | |
621 | ||
eafe8701 SF |
622 | /* Check if directory that we are searching has changed so we can decide |
623 | whether we can use the cached search results from the previous search */ | |
3870253e | 624 | static int is_dir_changed(struct file *file) |
eafe8701 | 625 | { |
c33f8d32 CH |
626 | struct inode *inode = file->f_path.dentry->d_inode; |
627 | struct cifsInodeInfo *cifsInfo = CIFS_I(inode); | |
eafe8701 | 628 | |
c33f8d32 | 629 | if (cifsInfo->time == 0) |
eafe8701 SF |
630 | return 1; /* directory was changed, perhaps due to unlink */ |
631 | else | |
632 | return 0; | |
633 | ||
634 | } | |
635 | ||
1da177e4 LT |
636 | /* find the corresponding entry in the search */ |
637 | /* Note that the SMB server returns search entries for . and .. which | |
638 | complicates logic here if we choose to parse for them and we do not | |
639 | assume that they are located in the findfirst return buffer.*/ | |
640 | /* We start counting in the buffer with entry 2 and increment for every | |
641 | entry (do not increment for . or .. entry) */ | |
642 | static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon, | |
3870253e | 643 | struct file *file, char **ppCurrentEntry, int *num_to_ret) |
1da177e4 LT |
644 | { |
645 | int rc = 0; | |
646 | int pos_in_buf = 0; | |
647 | loff_t first_entry_in_buffer; | |
648 | loff_t index_to_find = file->f_pos; | |
3870253e | 649 | struct cifsFileInfo *cifsFile = file->private_data; |
1da177e4 | 650 | /* check if index in the buffer */ |
50c2f753 | 651 | |
3870253e | 652 | if ((cifsFile == NULL) || (ppCurrentEntry == NULL) || |
eafe8701 | 653 | (num_to_ret == NULL)) |
1da177e4 | 654 | return -ENOENT; |
50c2f753 | 655 | |
1da177e4 | 656 | *ppCurrentEntry = NULL; |
3870253e SF |
657 | first_entry_in_buffer = |
658 | cifsFile->srch_inf.index_of_last_entry - | |
1da177e4 | 659 | cifsFile->srch_inf.entries_in_buffer; |
60808233 SF |
660 | |
661 | /* if first entry in buf is zero then is first buffer | |
662 | in search response data which means it is likely . and .. | |
663 | will be in this buffer, although some servers do not return | |
664 | . and .. for the root of a drive and for those we need | |
665 | to start two entries earlier */ | |
666 | ||
3979877e | 667 | dump_cifs_file_struct(file, "In fce "); |
3870253e SF |
668 | if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) && |
669 | is_dir_changed(file)) || | |
eafe8701 | 670 | (index_to_find < first_entry_in_buffer)) { |
1da177e4 | 671 | /* close and restart search */ |
790fe579 | 672 | cFYI(1, ("search backing up - close and restart search")); |
77c57ec8 SF |
673 | if (!cifsFile->srch_inf.endOfSearch && |
674 | !cifsFile->invalidHandle) { | |
675 | cifsFile->invalidHandle = true; | |
676 | CIFSFindClose(xid, pTcon, cifsFile->netfid); | |
677 | } | |
4523cc30 | 678 | if (cifsFile->srch_inf.ntwrk_buf_start) { |
790fe579 | 679 | cFYI(1, ("freeing SMB ff cache buf on search rewind")); |
4523cc30 | 680 | if (cifsFile->srch_inf.smallBuf) |
d47d7c1a SF |
681 | cifs_small_buf_release(cifsFile->srch_inf. |
682 | ntwrk_buf_start); | |
683 | else | |
684 | cifs_buf_release(cifsFile->srch_inf. | |
685 | ntwrk_buf_start); | |
1da177e4 | 686 | } |
3870253e | 687 | rc = initiate_cifs_search(xid, file); |
4523cc30 | 688 | if (rc) { |
790fe579 SF |
689 | cFYI(1, ("error %d reinitiating a search on rewind", |
690 | rc)); | |
1da177e4 LT |
691 | return rc; |
692 | } | |
693 | } | |
694 | ||
3870253e | 695 | while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) && |
4b18f2a9 | 696 | (rc == 0) && !cifsFile->srch_inf.endOfSearch) { |
790fe579 | 697 | cFYI(1, ("calling findnext2")); |
3870253e | 698 | rc = CIFSFindNext(xid, pTcon, cifsFile->netfid, |
dfb7533b | 699 | &cifsFile->srch_inf); |
4523cc30 | 700 | if (rc) |
1da177e4 LT |
701 | return -ENOENT; |
702 | } | |
4523cc30 | 703 | if (index_to_find < cifsFile->srch_inf.index_of_last_entry) { |
1da177e4 LT |
704 | /* we found the buffer that contains the entry */ |
705 | /* scan and find it */ | |
706 | int i; | |
3870253e SF |
707 | char *current_entry; |
708 | char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + | |
1da177e4 LT |
709 | smbCalcSize((struct smb_hdr *) |
710 | cifsFile->srch_inf.ntwrk_buf_start); | |
60808233 SF |
711 | |
712 | current_entry = cifsFile->srch_inf.srch_entries_start; | |
1da177e4 LT |
713 | first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry |
714 | - cifsFile->srch_inf.entries_in_buffer; | |
715 | pos_in_buf = index_to_find - first_entry_in_buffer; | |
790fe579 | 716 | cFYI(1, ("found entry - pos_in_buf %d", pos_in_buf)); |
5bafd765 | 717 | |
ad7a2926 | 718 | for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) { |
dfb7533b | 719 | /* go entry by entry figuring out which is first */ |
3870253e | 720 | current_entry = nxt_dir_entry(current_entry, end_of_smb, |
5bafd765 | 721 | cifsFile->srch_inf.info_level); |
1da177e4 | 722 | } |
790fe579 | 723 | if ((current_entry == NULL) && (i < pos_in_buf)) { |
1da177e4 | 724 | /* BB fixme - check if we should flag this error */ |
3870253e | 725 | cERROR(1, ("reached end of buf searching for pos in buf" |
1da177e4 | 726 | " %d index to find %lld rc %d", |
3870253e | 727 | pos_in_buf, index_to_find, rc)); |
1da177e4 LT |
728 | } |
729 | rc = 0; | |
730 | *ppCurrentEntry = current_entry; | |
731 | } else { | |
790fe579 | 732 | cFYI(1, ("index not in buffer - could not findnext into it")); |
1da177e4 LT |
733 | return 0; |
734 | } | |
735 | ||
790fe579 SF |
736 | if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) { |
737 | cFYI(1, ("can not return entries pos_in_buf beyond last")); | |
1da177e4 LT |
738 | *num_to_ret = 0; |
739 | } else | |
740 | *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf; | |
1da177e4 LT |
741 | |
742 | return rc; | |
743 | } | |
744 | ||
745 | /* inode num, inode type and filename returned */ | |
746 | static int cifs_get_name_from_search_buf(struct qstr *pqst, | |
747 | char *current_entry, __u16 level, unsigned int unicode, | |
3870253e | 748 | struct cifs_sb_info *cifs_sb, int max_len, ino_t *pinum) |
1da177e4 LT |
749 | { |
750 | int rc = 0; | |
751 | unsigned int len = 0; | |
3870253e SF |
752 | char *filename; |
753 | struct nls_table *nlt = cifs_sb->local_nls; | |
1da177e4 LT |
754 | |
755 | *pinum = 0; | |
756 | ||
790fe579 | 757 | if (level == SMB_FIND_FILE_UNIX) { |
3870253e | 758 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; |
1da177e4 LT |
759 | |
760 | filename = &pFindData->FileName[0]; | |
790fe579 | 761 | if (unicode) { |
1da177e4 LT |
762 | len = cifs_unicode_bytelen(filename); |
763 | } else { | |
764 | /* BB should we make this strnlen of PATH_MAX? */ | |
765 | len = strnlen(filename, PATH_MAX); | |
766 | } | |
767 | ||
3870253e | 768 | /* BB fixme - hash low and high 32 bits if not 64 bit arch BB */ |
790fe579 | 769 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) |
1da177e4 | 770 | *pinum = pFindData->UniqueId; |
790fe579 | 771 | } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) { |
3870253e | 772 | FILE_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
773 | (FILE_DIRECTORY_INFO *)current_entry; |
774 | filename = &pFindData->FileName[0]; | |
775 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 776 | } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
3870253e | 777 | FILE_FULL_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
778 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
779 | filename = &pFindData->FileName[0]; | |
780 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 781 | } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
3870253e | 782 | SEARCH_ID_FULL_DIR_INFO *pFindData = |
1da177e4 LT |
783 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
784 | filename = &pFindData->FileName[0]; | |
785 | len = le32_to_cpu(pFindData->FileNameLength); | |
786 | *pinum = pFindData->UniqueId; | |
790fe579 | 787 | } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
3870253e | 788 | FILE_BOTH_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
789 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
790 | filename = &pFindData->FileName[0]; | |
791 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 792 | } else if (level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 793 | FIND_FILE_STANDARD_INFO *pFindData = |
5bafd765 SF |
794 | (FIND_FILE_STANDARD_INFO *)current_entry; |
795 | filename = &pFindData->FileName[0]; | |
796 | /* one byte length, no name conversion */ | |
797 | len = (unsigned int)pFindData->FileNameLength; | |
1da177e4 | 798 | } else { |
790fe579 | 799 | cFYI(1, ("Unknown findfirst level %d", level)); |
1da177e4 LT |
800 | return -EINVAL; |
801 | } | |
5bafd765 | 802 | |
790fe579 | 803 | if (len > max_len) { |
3870253e | 804 | cERROR(1, ("bad search response length %d past smb end", len)); |
5bafd765 SF |
805 | return -EINVAL; |
806 | } | |
807 | ||
790fe579 | 808 | if (unicode) { |
1da177e4 LT |
809 | /* BB fixme - test with long names */ |
810 | /* Note converted filename can be longer than in unicode */ | |
790fe579 | 811 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) |
6a0b4824 SF |
812 | pqst->len = cifs_convertUCSpath((char *)pqst->name, |
813 | (__le16 *)filename, len/2, nlt); | |
814 | else | |
6a0b4824 | 815 | pqst->len = cifs_strfromUCS_le((char *)pqst->name, |
3870253e | 816 | (__le16 *)filename, len/2, nlt); |
1da177e4 LT |
817 | } else { |
818 | pqst->name = filename; | |
819 | pqst->len = len; | |
820 | } | |
3870253e | 821 | pqst->hash = full_name_hash(pqst->name, pqst->len); |
790fe579 | 822 | /* cFYI(1, ("filldir on %s",pqst->name)); */ |
1da177e4 LT |
823 | return rc; |
824 | } | |
825 | ||
826 | static int cifs_filldir(char *pfindEntry, struct file *file, | |
5bafd765 | 827 | filldir_t filldir, void *direntry, char *scratch_buf, int max_len) |
1da177e4 LT |
828 | { |
829 | int rc = 0; | |
830 | struct qstr qstring; | |
3870253e | 831 | struct cifsFileInfo *pCifsF; |
2c2130e1 | 832 | unsigned int obj_type; |
1da177e4 | 833 | ino_t inum; |
3870253e | 834 | struct cifs_sb_info *cifs_sb; |
1da177e4 LT |
835 | struct inode *tmp_inode; |
836 | struct dentry *tmp_dentry; | |
837 | ||
838 | /* get filename and len into qstring */ | |
839 | /* get dentry */ | |
840 | /* decide whether to create and populate ionde */ | |
790fe579 | 841 | if ((direntry == NULL) || (file == NULL)) |
1da177e4 LT |
842 | return -EINVAL; |
843 | ||
844 | pCifsF = file->private_data; | |
50c2f753 | 845 | |
790fe579 | 846 | if ((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL)) |
1da177e4 LT |
847 | return -ENOENT; |
848 | ||
3870253e | 849 | rc = cifs_entry_is_dot(pfindEntry, pCifsF); |
60808233 | 850 | /* skip . and .. since we added them first */ |
790fe579 | 851 | if (rc != 0) |
60808233 SF |
852 | return 0; |
853 | ||
e6a00296 | 854 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 LT |
855 | |
856 | qstring.name = scratch_buf; | |
3870253e | 857 | rc = cifs_get_name_from_search_buf(&qstring, pfindEntry, |
1da177e4 | 858 | pCifsF->srch_inf.info_level, |
3870253e | 859 | pCifsF->srch_inf.unicode, cifs_sb, |
5bafd765 | 860 | max_len, |
1da177e4 LT |
861 | &inum /* returned */); |
862 | ||
790fe579 | 863 | if (rc) |
1da177e4 LT |
864 | return rc; |
865 | ||
3870253e | 866 | rc = construct_dentry(&qstring, file, &tmp_inode, &tmp_dentry); |
790fe579 | 867 | if ((tmp_inode == NULL) || (tmp_dentry == NULL)) |
1da177e4 LT |
868 | return -ENOMEM; |
869 | ||
790fe579 | 870 | if (rc) { |
1da177e4 | 871 | /* inode created, we need to hash it with right inode number */ |
790fe579 | 872 | if (inum != 0) { |
3870253e SF |
873 | /* BB fixme - hash the 2 32 quantities bits together if |
874 | * necessary BB */ | |
1da177e4 LT |
875 | tmp_inode->i_ino = inum; |
876 | } | |
877 | insert_inode_hash(tmp_inode); | |
878 | } | |
879 | ||
966ca923 SF |
880 | /* we pass in rc below, indicating whether it is a new inode, |
881 | so we can figure out whether to invalidate the inode cached | |
882 | data if the file has changed */ | |
790fe579 | 883 | if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) |
966ca923 | 884 | unix_fill_in_inode(tmp_inode, |
5bafd765 SF |
885 | (FILE_UNIX_INFO *)pfindEntry, |
886 | &obj_type, rc); | |
790fe579 | 887 | else if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) |
5bafd765 SF |
888 | fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */, |
889 | pfindEntry, &obj_type, rc); | |
890 | else | |
891 | fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc); | |
b835bebe | 892 | |
790fe579 | 893 | if (rc) /* new inode - needs to be tied to dentry */ { |
b835bebe | 894 | d_instantiate(tmp_dentry, tmp_inode); |
790fe579 | 895 | if (rc == 2) |
b835bebe SF |
896 | d_rehash(tmp_dentry); |
897 | } | |
50c2f753 | 898 | |
3870253e SF |
899 | |
900 | rc = filldir(direntry, qstring.name, qstring.len, file->f_pos, | |
901 | tmp_inode->i_ino, obj_type); | |
790fe579 SF |
902 | if (rc) { |
903 | cFYI(1, ("filldir rc = %d", rc)); | |
7ca85ba7 SF |
904 | /* we can not return filldir errors to the caller |
905 | since they are "normal" when the stat blocksize | |
906 | is too small - we return remapped error instead */ | |
907 | rc = -EOVERFLOW; | |
1da177e4 LT |
908 | } |
909 | ||
910 | dput(tmp_dentry); | |
911 | return rc; | |
912 | } | |
913 | ||
914 | static int cifs_save_resume_key(const char *current_entry, | |
915 | struct cifsFileInfo *cifsFile) | |
916 | { | |
917 | int rc = 0; | |
918 | unsigned int len = 0; | |
919 | __u16 level; | |
3870253e | 920 | char *filename; |
1da177e4 | 921 | |
790fe579 | 922 | if ((cifsFile == NULL) || (current_entry == NULL)) |
1da177e4 LT |
923 | return -EINVAL; |
924 | ||
925 | level = cifsFile->srch_inf.info_level; | |
926 | ||
790fe579 | 927 | if (level == SMB_FIND_FILE_UNIX) { |
ad7a2926 | 928 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; |
1da177e4 LT |
929 | |
930 | filename = &pFindData->FileName[0]; | |
790fe579 | 931 | if (cifsFile->srch_inf.unicode) { |
1da177e4 LT |
932 | len = cifs_unicode_bytelen(filename); |
933 | } else { | |
934 | /* BB should we make this strnlen of PATH_MAX? */ | |
935 | len = strnlen(filename, PATH_MAX); | |
936 | } | |
937 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; | |
790fe579 | 938 | } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) { |
3870253e | 939 | FILE_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
940 | (FILE_DIRECTORY_INFO *)current_entry; |
941 | filename = &pFindData->FileName[0]; | |
942 | len = le32_to_cpu(pFindData->FileNameLength); | |
943 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
790fe579 | 944 | } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
3870253e | 945 | FILE_FULL_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
946 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
947 | filename = &pFindData->FileName[0]; | |
948 | len = le32_to_cpu(pFindData->FileNameLength); | |
949 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
790fe579 | 950 | } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
3870253e | 951 | SEARCH_ID_FULL_DIR_INFO *pFindData = |
1da177e4 LT |
952 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
953 | filename = &pFindData->FileName[0]; | |
954 | len = le32_to_cpu(pFindData->FileNameLength); | |
955 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
790fe579 | 956 | } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
50c2f753 | 957 | FILE_BOTH_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
958 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
959 | filename = &pFindData->FileName[0]; | |
960 | len = le32_to_cpu(pFindData->FileNameLength); | |
961 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
790fe579 | 962 | } else if (level == SMB_FIND_FILE_INFO_STANDARD) { |
3870253e | 963 | FIND_FILE_STANDARD_INFO *pFindData = |
5bafd765 SF |
964 | (FIND_FILE_STANDARD_INFO *)current_entry; |
965 | filename = &pFindData->FileName[0]; | |
966 | /* one byte length, no name conversion */ | |
967 | len = (unsigned int)pFindData->FileNameLength; | |
203cf2fc | 968 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; |
1da177e4 | 969 | } else { |
790fe579 | 970 | cFYI(1, ("Unknown findfirst level %d", level)); |
1da177e4 LT |
971 | return -EINVAL; |
972 | } | |
973 | cifsFile->srch_inf.resume_name_len = len; | |
974 | cifsFile->srch_inf.presume_name = filename; | |
975 | return rc; | |
976 | } | |
977 | ||
978 | int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) | |
979 | { | |
980 | int rc = 0; | |
3870253e | 981 | int xid, i; |
1da177e4 LT |
982 | struct cifs_sb_info *cifs_sb; |
983 | struct cifsTconInfo *pTcon; | |
984 | struct cifsFileInfo *cifsFile = NULL; | |
3870253e | 985 | char *current_entry; |
1da177e4 | 986 | int num_to_fill = 0; |
3870253e | 987 | char *tmp_buf = NULL; |
50c2f753 | 988 | char *end_of_smb; |
5bafd765 | 989 | int max_len; |
1da177e4 LT |
990 | |
991 | xid = GetXid(); | |
992 | ||
e6a00296 | 993 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 | 994 | pTcon = cifs_sb->tcon; |
790fe579 | 995 | if (pTcon == NULL) |
1da177e4 LT |
996 | return -EINVAL; |
997 | ||
1da177e4 LT |
998 | switch ((int) file->f_pos) { |
999 | case 0: | |
60808233 | 1000 | if (filldir(direntry, ".", 1, file->f_pos, |
e6a00296 | 1001 | file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) { |
60808233 | 1002 | cERROR(1, ("Filldir for current dir failed")); |
1da177e4 LT |
1003 | rc = -ENOMEM; |
1004 | break; | |
1005 | } | |
60808233 | 1006 | file->f_pos++; |
1da177e4 | 1007 | case 1: |
60808233 | 1008 | if (filldir(direntry, "..", 2, file->f_pos, |
e6a00296 | 1009 | file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) { |
26a21b98 | 1010 | cERROR(1, ("Filldir for parent dir failed")); |
1da177e4 LT |
1011 | rc = -ENOMEM; |
1012 | break; | |
1013 | } | |
60808233 SF |
1014 | file->f_pos++; |
1015 | default: | |
3870253e SF |
1016 | /* 1) If search is active, |
1017 | is in current search buffer? | |
1da177e4 LT |
1018 | if it before then restart search |
1019 | if after then keep searching till find it */ | |
1020 | ||
790fe579 | 1021 | if (file->private_data == NULL) { |
3870253e | 1022 | rc = initiate_cifs_search(xid, file); |
790fe579 SF |
1023 | cFYI(1, ("initiate cifs search rc %d", rc)); |
1024 | if (rc) { | |
1da177e4 LT |
1025 | FreeXid(xid); |
1026 | return rc; | |
1027 | } | |
1028 | } | |
790fe579 | 1029 | if (file->private_data == NULL) { |
1da177e4 LT |
1030 | rc = -EINVAL; |
1031 | FreeXid(xid); | |
1032 | return rc; | |
1033 | } | |
1034 | cifsFile = file->private_data; | |
1035 | if (cifsFile->srch_inf.endOfSearch) { | |
790fe579 | 1036 | if (cifsFile->srch_inf.emptyDir) { |
1da177e4 LT |
1037 | cFYI(1, ("End of search, empty dir")); |
1038 | rc = 0; | |
1039 | break; | |
1040 | } | |
1041 | } /* else { | |
4b18f2a9 | 1042 | cifsFile->invalidHandle = true; |
1da177e4 | 1043 | CIFSFindClose(xid, pTcon, cifsFile->netfid); |
aaa9bbe0 | 1044 | } */ |
1da177e4 | 1045 | |
3870253e SF |
1046 | rc = find_cifs_entry(xid, pTcon, file, |
1047 | ¤t_entry, &num_to_fill); | |
790fe579 SF |
1048 | if (rc) { |
1049 | cFYI(1, ("fce error %d", rc)); | |
1da177e4 LT |
1050 | goto rddir2_exit; |
1051 | } else if (current_entry != NULL) { | |
790fe579 | 1052 | cFYI(1, ("entry %lld found", file->f_pos)); |
1da177e4 | 1053 | } else { |
790fe579 | 1054 | cFYI(1, ("could not find entry")); |
1da177e4 LT |
1055 | goto rddir2_exit; |
1056 | } | |
790fe579 SF |
1057 | cFYI(1, ("loop through %d times filling dir for net buf %p", |
1058 | num_to_fill, cifsFile->srch_inf.ntwrk_buf_start)); | |
5bafd765 SF |
1059 | max_len = smbCalcSize((struct smb_hdr *) |
1060 | cifsFile->srch_inf.ntwrk_buf_start); | |
1061 | end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len; | |
1062 | ||
6a0b4824 SF |
1063 | /* To be safe - for UCS to UTF-8 with strings loaded |
1064 | with the rare long characters alloc more to account for | |
1065 | such multibyte target UTF-8 characters. cifs_unicode.c, | |
1066 | which actually does the conversion, has the same limit */ | |
1067 | tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL); | |
790fe579 SF |
1068 | for (i = 0; (i < num_to_fill) && (rc == 0); i++) { |
1069 | if (current_entry == NULL) { | |
1da177e4 | 1070 | /* evaluate whether this case is an error */ |
26f57364 | 1071 | cERROR(1, ("past SMB end, num to fill %d i %d", |
1da177e4 LT |
1072 | num_to_fill, i)); |
1073 | break; | |
1074 | } | |
60808233 SF |
1075 | /* if buggy server returns . and .. late do |
1076 | we want to check for that here? */ | |
5bafd765 SF |
1077 | rc = cifs_filldir(current_entry, file, |
1078 | filldir, direntry, tmp_buf, max_len); | |
790fe579 | 1079 | if (rc == -EOVERFLOW) { |
7ca85ba7 SF |
1080 | rc = 0; |
1081 | break; | |
1082 | } | |
1083 | ||
1da177e4 | 1084 | file->f_pos++; |
790fe579 | 1085 | if (file->f_pos == |
3979877e | 1086 | cifsFile->srch_inf.index_of_last_entry) { |
790fe579 SF |
1087 | cFYI(1, ("last entry in buf at pos %lld %s", |
1088 | file->f_pos, tmp_buf)); | |
1089 | cifs_save_resume_key(current_entry, cifsFile); | |
1da177e4 | 1090 | break; |
790fe579 SF |
1091 | } else |
1092 | current_entry = | |
5bafd765 SF |
1093 | nxt_dir_entry(current_entry, end_of_smb, |
1094 | cifsFile->srch_inf.info_level); | |
1da177e4 LT |
1095 | } |
1096 | kfree(tmp_buf); | |
1097 | break; | |
1098 | } /* end switch */ | |
1099 | ||
1100 | rddir2_exit: | |
1da177e4 LT |
1101 | FreeXid(xid); |
1102 | return rc; | |
1103 | } |