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 |
cda0ec6a | 7 | * Copyright (C) Red Hat, Inc., 2011 |
1da177e4 LT |
8 | * Author(s): Steve French (sfrench@us.ibm.com) |
9 | * | |
10 | * This library is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU Lesser General Public License as published | |
12 | * by the Free Software Foundation; either version 2.1 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This library is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
18 | * the GNU Lesser General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU Lesser General Public License | |
21 | * along with this library; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
23 | */ | |
24 | #include <linux/fs.h> | |
273d81d6 | 25 | #include <linux/pagemap.h> |
5a0e3ad6 | 26 | #include <linux/slab.h> |
1da177e4 | 27 | #include <linux/stat.h> |
1da177e4 LT |
28 | #include "cifspdu.h" |
29 | #include "cifsglob.h" | |
30 | #include "cifsproto.h" | |
31 | #include "cifs_unicode.h" | |
32 | #include "cifs_debug.h" | |
33 | #include "cifs_fs_sb.h" | |
34 | #include "cifsfs.h" | |
3d519bd1 | 35 | #include "smb2proto.h" |
1da177e4 | 36 | |
f5884166 JL |
37 | /* |
38 | * To be safe - for UCS to UTF-8 with strings loaded with the rare long | |
39 | * characters alloc more to account for such multibyte target UTF-8 | |
40 | * characters. | |
41 | */ | |
42 | #define UNICODE_NAME_MAX ((4 * NAME_MAX) + 2) | |
43 | ||
3979877e SF |
44 | #ifdef CONFIG_CIFS_DEBUG2 |
45 | static void dump_cifs_file_struct(struct file *file, char *label) | |
1da177e4 | 46 | { |
6dc0f87e | 47 | struct cifsFileInfo *cf; |
1da177e4 | 48 | |
4523cc30 | 49 | if (file) { |
1da177e4 | 50 | cf = file->private_data; |
4523cc30 | 51 | if (cf == NULL) { |
f96637be | 52 | cifs_dbg(FYI, "empty cifs private file data\n"); |
1da177e4 LT |
53 | return; |
54 | } | |
ad7a2926 | 55 | if (cf->invalidHandle) |
a0a3036b | 56 | cifs_dbg(FYI, "Invalid handle\n"); |
ad7a2926 | 57 | if (cf->srch_inf.endOfSearch) |
f96637be | 58 | cifs_dbg(FYI, "end of search\n"); |
ad7a2926 | 59 | if (cf->srch_inf.emptyDir) |
f96637be | 60 | cifs_dbg(FYI, "empty dir\n"); |
1da177e4 | 61 | } |
3979877e | 62 | } |
90c81e0b SF |
63 | #else |
64 | static inline void dump_cifs_file_struct(struct file *file, char *label) | |
65 | { | |
66 | } | |
3979877e | 67 | #endif /* DEBUG2 */ |
1da177e4 | 68 | |
cc0bad75 | 69 | /* |
eb1b3fa5 JL |
70 | * Attempt to preload the dcache with the results from the FIND_FIRST/NEXT |
71 | * | |
cc0bad75 | 72 | * Find the dentry that matches "name". If there isn't one, create one. If it's |
9e6d722f NA |
73 | * a negative dentry or the uniqueid or filetype(mode) changed, |
74 | * then drop it and recreate it. | |
cc0bad75 | 75 | */ |
eb1b3fa5 JL |
76 | static void |
77 | cifs_prime_dcache(struct dentry *parent, struct qstr *name, | |
cc0bad75 JL |
78 | struct cifs_fattr *fattr) |
79 | { | |
80 | struct dentry *dentry, *alias; | |
81 | struct inode *inode; | |
fc64005c | 82 | struct super_block *sb = parent->d_sb; |
2f2591a3 | 83 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
3125d265 | 84 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq); |
cc0bad75 | 85 | |
f96637be | 86 | cifs_dbg(FYI, "%s: for %s\n", __func__, name->name); |
cc0bad75 | 87 | |
4f522a24 | 88 | dentry = d_hash_and_lookup(parent, name); |
3125d265 AV |
89 | if (!dentry) { |
90 | /* | |
91 | * If we know that the inode will need to be revalidated | |
92 | * immediately, then don't create a new dentry for it. | |
93 | * We'll end up doing an on the wire call either way and | |
94 | * this spares us an invalidation. | |
95 | */ | |
96 | if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL) | |
97 | return; | |
98 | retry: | |
99 | dentry = d_alloc_parallel(parent, name, &wq); | |
100 | } | |
a1c83681 | 101 | if (IS_ERR(dentry)) |
4f522a24 | 102 | return; |
3125d265 | 103 | if (!d_in_lookup(dentry)) { |
2b0143b5 | 104 | inode = d_inode(dentry); |
2f2591a3 | 105 | if (inode) { |
3125d265 AV |
106 | if (d_mountpoint(dentry)) { |
107 | dput(dentry); | |
108 | return; | |
109 | } | |
2f2591a3 JL |
110 | /* |
111 | * If we're generating inode numbers, then we don't | |
112 | * want to clobber the existing one with the one that | |
113 | * the readdir code created. | |
114 | */ | |
115 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) | |
116 | fattr->cf_uniqueid = CIFS_I(inode)->uniqueid; | |
117 | ||
9e6d722f NA |
118 | /* update inode in place |
119 | * if both i_ino and i_mode didn't change */ | |
120 | if (CIFS_I(inode)->uniqueid == fattr->cf_uniqueid && | |
121 | (inode->i_mode & S_IFMT) == | |
122 | (fattr->cf_mode & S_IFMT)) { | |
2f2591a3 | 123 | cifs_fattr_to_inode(inode, fattr); |
3125d265 AV |
124 | dput(dentry); |
125 | return; | |
2f2591a3 | 126 | } |
cd60042c | 127 | } |
5542aa2f | 128 | d_invalidate(dentry); |
cc0bad75 | 129 | dput(dentry); |
3125d265 AV |
130 | goto retry; |
131 | } else { | |
132 | inode = cifs_iget(sb, fattr); | |
133 | if (!inode) | |
134 | inode = ERR_PTR(-ENOMEM); | |
135 | alias = d_splice_alias(inode, dentry); | |
136 | d_lookup_done(dentry); | |
137 | if (alias && !IS_ERR(alias)) | |
138 | dput(alias); | |
cc0bad75 | 139 | } |
eb1b3fa5 | 140 | dput(dentry); |
cc0bad75 JL |
141 | } |
142 | ||
046aca3c PAS |
143 | static bool reparse_file_needs_reval(const struct cifs_fattr *fattr) |
144 | { | |
145 | if (!(fattr->cf_cifsattrs & ATTR_REPARSE)) | |
146 | return false; | |
147 | /* | |
148 | * The DFS tags should be only intepreted by server side as per | |
149 | * MS-FSCC 2.1.2.1, but let's include them anyway. | |
150 | * | |
151 | * Besides, if cf_cifstag is unset (0), then we still need it to be | |
152 | * revalidated to know exactly what reparse point it is. | |
153 | */ | |
154 | switch (fattr->cf_cifstag) { | |
155 | case IO_REPARSE_TAG_DFS: | |
156 | case IO_REPARSE_TAG_DFSR: | |
157 | case IO_REPARSE_TAG_SYMLINK: | |
158 | case IO_REPARSE_TAG_NFS: | |
159 | case 0: | |
160 | return true; | |
161 | } | |
162 | return false; | |
163 | } | |
164 | ||
0b8f18e3 JL |
165 | static void |
166 | cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb) | |
1da177e4 | 167 | { |
0b8f18e3 JL |
168 | fattr->cf_uid = cifs_sb->mnt_uid; |
169 | fattr->cf_gid = cifs_sb->mnt_gid; | |
1da177e4 | 170 | |
0b8f18e3 JL |
171 | if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { |
172 | fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode; | |
173 | fattr->cf_dtype = DT_DIR; | |
1da177e4 | 174 | } else { |
0b8f18e3 JL |
175 | fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode; |
176 | fattr->cf_dtype = DT_REG; | |
1da177e4 LT |
177 | } |
178 | ||
eb85d94b PS |
179 | /* |
180 | * We need to revalidate it further to make a decision about whether it | |
181 | * is a symbolic link, DFS referral or a reparse point with a direct | |
182 | * access like junctions, deduplicated files, NFS symlinks. | |
183 | */ | |
046aca3c | 184 | if (reparse_file_needs_reval(fattr)) |
eb85d94b PS |
185 | fattr->cf_flags |= CIFS_FATTR_NEED_REVAL; |
186 | ||
74d290da JM |
187 | /* non-unix readdir doesn't provide nlink */ |
188 | fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK; | |
189 | ||
0b8f18e3 JL |
190 | if (fattr->cf_cifsattrs & ATTR_READONLY) |
191 | fattr->cf_mode &= ~S_IWUGO; | |
5bafd765 | 192 | |
ccb5c001 JL |
193 | /* |
194 | * We of course don't get ACL info in FIND_FIRST/NEXT results, so | |
195 | * mark it for revalidation so that "ls -l" will look right. It might | |
196 | * be super-slow, but if we don't do this then the ownership of files | |
197 | * may look wrong since the inodes may not have timed out by the time | |
198 | * "ls" does a stat() call on them. | |
199 | */ | |
e3e056c3 AA |
200 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) || |
201 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) | |
ccb5c001 JL |
202 | fattr->cf_flags |= CIFS_FATTR_NEED_REVAL; |
203 | ||
0b8f18e3 JL |
204 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL && |
205 | fattr->cf_cifsattrs & ATTR_SYSTEM) { | |
206 | if (fattr->cf_eof == 0) { | |
207 | fattr->cf_mode &= ~S_IFMT; | |
208 | fattr->cf_mode |= S_IFIFO; | |
209 | fattr->cf_dtype = DT_FIFO; | |
3020a1f5 | 210 | } else { |
4468eb3f | 211 | /* |
0b8f18e3 JL |
212 | * trying to get the type and mode via SFU can be slow, |
213 | * so just call those regular files for now, and mark | |
214 | * for reval | |
4468eb3f | 215 | */ |
0b8f18e3 | 216 | fattr->cf_flags |= CIFS_FATTR_NEED_REVAL; |
4468eb3f JL |
217 | } |
218 | } | |
0b8f18e3 | 219 | } |
1da177e4 | 220 | |
3d519bd1 AA |
221 | /* Fill a cifs_fattr struct with info from SMB_FIND_FILE_POSIX_INFO. */ |
222 | static void | |
223 | cifs_posix_to_fattr(struct cifs_fattr *fattr, struct smb2_posix_info *info, | |
224 | struct cifs_sb_info *cifs_sb) | |
225 | { | |
226 | struct smb2_posix_info_parsed parsed; | |
227 | ||
228 | posix_info_parse(info, NULL, &parsed); | |
229 | ||
230 | memset(fattr, 0, sizeof(*fattr)); | |
231 | fattr->cf_uniqueid = le64_to_cpu(info->Inode); | |
232 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); | |
233 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
234 | ||
235 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
236 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); | |
237 | fattr->cf_ctime = cifs_NTtimeToUnix(info->CreationTime); | |
238 | ||
239 | fattr->cf_nlink = le32_to_cpu(info->HardLinks); | |
240 | fattr->cf_cifsattrs = le32_to_cpu(info->DosAttributes); | |
241 | ||
242 | /* | |
243 | * Since we set the inode type below we need to mask off | |
244 | * to avoid strange results if bits set above. | |
245 | * XXX: why not make server&client use the type bits? | |
246 | */ | |
247 | fattr->cf_mode = le32_to_cpu(info->Mode) & ~S_IFMT; | |
248 | ||
a0a3036b | 249 | cifs_dbg(FYI, "posix fattr: dev %d, reparse %d, mode %o\n", |
3d519bd1 AA |
250 | le32_to_cpu(info->DeviceId), |
251 | le32_to_cpu(info->ReparseTag), | |
252 | le32_to_cpu(info->Mode)); | |
253 | ||
254 | if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { | |
255 | fattr->cf_mode |= S_IFDIR; | |
256 | fattr->cf_dtype = DT_DIR; | |
257 | } else { | |
258 | /* | |
259 | * mark anything that is not a dir as regular | |
260 | * file. special files should have the REPARSE | |
261 | * attribute and will be marked as needing revaluation | |
262 | */ | |
263 | fattr->cf_mode |= S_IFREG; | |
264 | fattr->cf_dtype = DT_REG; | |
265 | } | |
266 | ||
267 | if (reparse_file_needs_reval(fattr)) | |
268 | fattr->cf_flags |= CIFS_FATTR_NEED_REVAL; | |
269 | ||
270 | /* TODO map SIDs */ | |
271 | fattr->cf_uid = cifs_sb->mnt_uid; | |
272 | fattr->cf_gid = cifs_sb->mnt_gid; | |
273 | } | |
274 | ||
046aca3c PAS |
275 | static void __dir_info_to_fattr(struct cifs_fattr *fattr, const void *info) |
276 | { | |
277 | const FILE_DIRECTORY_INFO *fi = info; | |
278 | ||
279 | memset(fattr, 0, sizeof(*fattr)); | |
280 | fattr->cf_cifsattrs = le32_to_cpu(fi->ExtFileAttributes); | |
281 | fattr->cf_eof = le64_to_cpu(fi->EndOfFile); | |
282 | fattr->cf_bytes = le64_to_cpu(fi->AllocationSize); | |
283 | fattr->cf_createtime = le64_to_cpu(fi->CreationTime); | |
284 | fattr->cf_atime = cifs_NTtimeToUnix(fi->LastAccessTime); | |
285 | fattr->cf_ctime = cifs_NTtimeToUnix(fi->ChangeTime); | |
286 | fattr->cf_mtime = cifs_NTtimeToUnix(fi->LastWriteTime); | |
287 | } | |
288 | ||
c052e2b4 | 289 | void |
0b8f18e3 JL |
290 | cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info, |
291 | struct cifs_sb_info *cifs_sb) | |
292 | { | |
046aca3c PAS |
293 | __dir_info_to_fattr(fattr, info); |
294 | cifs_fill_common_info(fattr, cifs_sb); | |
295 | } | |
0b8f18e3 | 296 | |
046aca3c PAS |
297 | static void cifs_fulldir_info_to_fattr(struct cifs_fattr *fattr, |
298 | SEARCH_ID_FULL_DIR_INFO *info, | |
299 | struct cifs_sb_info *cifs_sb) | |
300 | { | |
301 | __dir_info_to_fattr(fattr, info); | |
302 | ||
303 | /* See MS-FSCC 2.4.18 FileIdFullDirectoryInformation */ | |
304 | if (fattr->cf_cifsattrs & ATTR_REPARSE) | |
305 | fattr->cf_cifstag = le32_to_cpu(info->EaSize); | |
0b8f18e3 JL |
306 | cifs_fill_common_info(fattr, cifs_sb); |
307 | } | |
1da177e4 | 308 | |
15dd4781 | 309 | static void |
0b8f18e3 JL |
310 | cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info, |
311 | struct cifs_sb_info *cifs_sb) | |
312 | { | |
0d424ad0 | 313 | int offset = cifs_sb_master_tcon(cifs_sb)->ses->server->timeAdj; |
1da177e4 | 314 | |
0b8f18e3 JL |
315 | memset(fattr, 0, sizeof(*fattr)); |
316 | fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate, | |
317 | info->LastAccessTime, offset); | |
318 | fattr->cf_ctime = cnvrtDosUnixTm(info->LastWriteDate, | |
319 | info->LastWriteTime, offset); | |
320 | fattr->cf_mtime = cnvrtDosUnixTm(info->LastWriteDate, | |
321 | info->LastWriteTime, offset); | |
322 | ||
323 | fattr->cf_cifsattrs = le16_to_cpu(info->Attributes); | |
324 | fattr->cf_bytes = le32_to_cpu(info->AllocationSize); | |
325 | fattr->cf_eof = le32_to_cpu(info->DataSize); | |
326 | ||
327 | cifs_fill_common_info(fattr, cifs_sb); | |
1da177e4 LT |
328 | } |
329 | ||
0e0d2cf3 SF |
330 | /* BB eventually need to add the following helper function to |
331 | resolve NT_STATUS_STOPPED_ON_SYMLINK return code when | |
332 | we try to do FindFirst on (NTFS) directory symlinks */ | |
333 | /* | |
334 | int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb, | |
6d5786a3 | 335 | unsigned int xid) |
0e0d2cf3 SF |
336 | { |
337 | __u16 fid; | |
338 | int len; | |
339 | int oplock = 0; | |
340 | int rc; | |
96daf2b0 | 341 | struct cifs_tcon *ptcon = cifs_sb_tcon(cifs_sb); |
0e0d2cf3 SF |
342 | char *tmpbuffer; |
343 | ||
344 | rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ, | |
345 | OPEN_REPARSE_POINT, &fid, &oplock, NULL, | |
346 | cifs_sb->local_nls, | |
2baa2682 | 347 | cifs_remap(cifs_sb); |
0e0d2cf3 SF |
348 | if (!rc) { |
349 | tmpbuffer = kmalloc(maxpath); | |
350 | rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path, | |
351 | tmpbuffer, | |
352 | maxpath -1, | |
353 | fid, | |
354 | cifs_sb->local_nls); | |
355 | if (CIFSSMBClose(xid, ptcon, fid)) { | |
f96637be | 356 | cifs_dbg(FYI, "Error closing temporary reparsepoint open\n"); |
0e0d2cf3 SF |
357 | } |
358 | } | |
359 | } | |
360 | */ | |
361 | ||
92fc65a7 PS |
362 | static int |
363 | initiate_cifs_search(const unsigned int xid, struct file *file) | |
1da177e4 | 364 | { |
2608bee7 | 365 | __u16 search_flags; |
1da177e4 | 366 | int rc = 0; |
7ffec372 | 367 | char *full_path = NULL; |
3870253e | 368 | struct cifsFileInfo *cifsFile; |
7119e220 | 369 | struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file); |
59c55ba1 | 370 | struct tcon_link *tlink = NULL; |
29e20f9c | 371 | struct cifs_tcon *tcon; |
92fc65a7 | 372 | struct TCP_Server_Info *server; |
1da177e4 | 373 | |
7ffec372 | 374 | if (file->private_data == NULL) { |
59c55ba1 JL |
375 | tlink = cifs_sb_tlink(cifs_sb); |
376 | if (IS_ERR(tlink)) | |
377 | return PTR_ERR(tlink); | |
378 | ||
379 | cifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); | |
380 | if (cifsFile == NULL) { | |
381 | rc = -ENOMEM; | |
382 | goto error_exit; | |
383 | } | |
81ddd8c0 | 384 | spin_lock_init(&cifsFile->file_info_lock); |
59c55ba1 JL |
385 | file->private_data = cifsFile; |
386 | cifsFile->tlink = cifs_get_tlink(tlink); | |
29e20f9c | 387 | tcon = tlink_tcon(tlink); |
59c55ba1 JL |
388 | } else { |
389 | cifsFile = file->private_data; | |
29e20f9c | 390 | tcon = tlink_tcon(cifsFile->tlink); |
7ffec372 | 391 | } |
1da177e4 | 392 | |
92fc65a7 PS |
393 | server = tcon->ses->server; |
394 | ||
395 | if (!server->ops->query_dir_first) { | |
396 | rc = -ENOSYS; | |
397 | goto error_exit; | |
398 | } | |
399 | ||
4b18f2a9 SF |
400 | cifsFile->invalidHandle = true; |
401 | cifsFile->srch_inf.endOfSearch = false; | |
1da177e4 | 402 | |
1f1735cb | 403 | full_path = build_path_from_dentry(file_dentry(file)); |
7ffec372 JL |
404 | if (full_path == NULL) { |
405 | rc = -ENOMEM; | |
406 | goto error_exit; | |
407 | } | |
1da177e4 | 408 | |
f96637be | 409 | cifs_dbg(FYI, "Full path: %s start at: %lld\n", full_path, file->f_pos); |
1da177e4 | 410 | |
75cf6bdc | 411 | ffirst_retry: |
1da177e4 | 412 | /* test for Unix extensions */ |
c18c842b | 413 | /* but now check for them on the share/mount not on the SMB session */ |
29e20f9c PS |
414 | /* if (cap_unix(tcon->ses) { */ |
415 | if (tcon->unix_ext) | |
5bafd765 | 416 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX; |
3d519bd1 AA |
417 | else if (tcon->posix_extensions) |
418 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_POSIX_INFO; | |
29e20f9c PS |
419 | else if ((tcon->ses->capabilities & |
420 | tcon->ses->server->vals->cap_nt_find) == 0) { | |
5bafd765 | 421 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD; |
1da177e4 LT |
422 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
423 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; | |
424 | } else /* not srvinos - BB fixme add check for backlevel? */ { | |
425 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
426 | } | |
427 | ||
2608bee7 SP |
428 | search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME; |
429 | if (backup_cred(cifs_sb)) | |
430 | search_flags |= CIFS_SEARCH_BACKUP_SEARCH; | |
431 | ||
92fc65a7 PS |
432 | rc = server->ops->query_dir_first(xid, tcon, full_path, cifs_sb, |
433 | &cifsFile->fid, search_flags, | |
434 | &cifsFile->srch_inf); | |
435 | ||
4523cc30 | 436 | if (rc == 0) |
4b18f2a9 | 437 | cifsFile->invalidHandle = false; |
e836f015 | 438 | /* BB add following call to handle readdir on new NTFS symlink errors |
0e0d2cf3 SF |
439 | else if STATUS_STOPPED_ON_SYMLINK |
440 | call get_symlink_reparse_path and retry with new path */ | |
441 | else if ((rc == -EOPNOTSUPP) && | |
75cf6bdc SF |
442 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
443 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; | |
444 | goto ffirst_retry; | |
445 | } | |
7ffec372 | 446 | error_exit: |
1da177e4 | 447 | kfree(full_path); |
7ffec372 | 448 | cifs_put_tlink(tlink); |
1da177e4 LT |
449 | return rc; |
450 | } | |
451 | ||
452 | /* return length of unicode string in bytes */ | |
cda0ec6a | 453 | static int cifs_unicode_bytelen(const char *str) |
1da177e4 LT |
454 | { |
455 | int len; | |
cda0ec6a | 456 | const __le16 *ustr = (const __le16 *)str; |
1da177e4 | 457 | |
3870253e | 458 | for (len = 0; len <= PATH_MAX; len++) { |
4523cc30 | 459 | if (ustr[len] == 0) |
1da177e4 LT |
460 | return len << 1; |
461 | } | |
f96637be | 462 | cifs_dbg(FYI, "Unicode string longer than PATH_MAX found\n"); |
1da177e4 LT |
463 | return len << 1; |
464 | } | |
465 | ||
5bafd765 | 466 | static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level) |
1da177e4 | 467 | { |
3870253e | 468 | char *new_entry; |
ad7a2926 | 469 | FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry; |
1da177e4 | 470 | |
4523cc30 | 471 | if (level == SMB_FIND_FILE_INFO_STANDARD) { |
ad7a2926 | 472 | FIND_FILE_STANDARD_INFO *pfData; |
5bafd765 SF |
473 | pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo; |
474 | ||
475 | new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) + | |
476 | pfData->FileNameLength; | |
8ad8aa35 DC |
477 | } else { |
478 | u32 next_offset = le32_to_cpu(pDirInfo->NextEntryOffset); | |
479 | ||
480 | if (old_entry + next_offset < old_entry) { | |
a0a3036b | 481 | cifs_dbg(VFS, "Invalid offset %u\n", next_offset); |
8ad8aa35 DC |
482 | return NULL; |
483 | } | |
484 | new_entry = old_entry + next_offset; | |
485 | } | |
f96637be | 486 | cifs_dbg(FYI, "new entry %p old entry %p\n", new_entry, old_entry); |
1da177e4 | 487 | /* validate that new_entry is not past end of SMB */ |
4523cc30 | 488 | if (new_entry >= end_of_smb) { |
f96637be JP |
489 | cifs_dbg(VFS, "search entry %p began after end of SMB %p old entry %p\n", |
490 | new_entry, end_of_smb, old_entry); | |
1da177e4 | 491 | return NULL; |
4523cc30 | 492 | } else if (((level == SMB_FIND_FILE_INFO_STANDARD) && |
3870253e SF |
493 | (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) |
494 | || ((level != SMB_FIND_FILE_INFO_STANDARD) && | |
5bafd765 | 495 | (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) { |
f96637be JP |
496 | cifs_dbg(VFS, "search entry %p extends after end of SMB %p\n", |
497 | new_entry, end_of_smb); | |
09d1db5c | 498 | return NULL; |
3870253e | 499 | } else |
1da177e4 LT |
500 | return new_entry; |
501 | ||
502 | } | |
503 | ||
cda0ec6a CH |
504 | struct cifs_dirent { |
505 | const char *name; | |
506 | size_t namelen; | |
507 | u32 resume_key; | |
508 | u64 ino; | |
509 | }; | |
510 | ||
3d519bd1 AA |
511 | static void cifs_fill_dirent_posix(struct cifs_dirent *de, |
512 | const struct smb2_posix_info *info) | |
513 | { | |
514 | struct smb2_posix_info_parsed parsed; | |
515 | ||
516 | /* payload should have already been checked at this point */ | |
517 | if (posix_info_parse(info, NULL, &parsed) < 0) { | |
a0a3036b | 518 | cifs_dbg(VFS, "Invalid POSIX info payload\n"); |
3d519bd1 AA |
519 | return; |
520 | } | |
521 | ||
522 | de->name = parsed.name; | |
523 | de->namelen = parsed.name_len; | |
524 | de->resume_key = info->Ignored; | |
525 | de->ino = le64_to_cpu(info->Inode); | |
526 | } | |
527 | ||
cda0ec6a CH |
528 | static void cifs_fill_dirent_unix(struct cifs_dirent *de, |
529 | const FILE_UNIX_INFO *info, bool is_unicode) | |
530 | { | |
531 | de->name = &info->FileName[0]; | |
532 | if (is_unicode) | |
533 | de->namelen = cifs_unicode_bytelen(de->name); | |
534 | else | |
535 | de->namelen = strnlen(de->name, PATH_MAX); | |
536 | de->resume_key = info->ResumeKey; | |
537 | de->ino = le64_to_cpu(info->basic.UniqueId); | |
538 | } | |
539 | ||
540 | static void cifs_fill_dirent_dir(struct cifs_dirent *de, | |
541 | const FILE_DIRECTORY_INFO *info) | |
542 | { | |
543 | de->name = &info->FileName[0]; | |
544 | de->namelen = le32_to_cpu(info->FileNameLength); | |
545 | de->resume_key = info->FileIndex; | |
546 | } | |
547 | ||
548 | static void cifs_fill_dirent_full(struct cifs_dirent *de, | |
549 | const FILE_FULL_DIRECTORY_INFO *info) | |
550 | { | |
551 | de->name = &info->FileName[0]; | |
552 | de->namelen = le32_to_cpu(info->FileNameLength); | |
553 | de->resume_key = info->FileIndex; | |
554 | } | |
555 | ||
556 | static void cifs_fill_dirent_search(struct cifs_dirent *de, | |
557 | const SEARCH_ID_FULL_DIR_INFO *info) | |
558 | { | |
559 | de->name = &info->FileName[0]; | |
560 | de->namelen = le32_to_cpu(info->FileNameLength); | |
561 | de->resume_key = info->FileIndex; | |
562 | de->ino = le64_to_cpu(info->UniqueId); | |
563 | } | |
564 | ||
565 | static void cifs_fill_dirent_both(struct cifs_dirent *de, | |
566 | const FILE_BOTH_DIRECTORY_INFO *info) | |
567 | { | |
568 | de->name = &info->FileName[0]; | |
569 | de->namelen = le32_to_cpu(info->FileNameLength); | |
570 | de->resume_key = info->FileIndex; | |
571 | } | |
572 | ||
573 | static void cifs_fill_dirent_std(struct cifs_dirent *de, | |
574 | const FIND_FILE_STANDARD_INFO *info) | |
575 | { | |
576 | de->name = &info->FileName[0]; | |
577 | /* one byte length, no endianess conversion */ | |
578 | de->namelen = info->FileNameLength; | |
579 | de->resume_key = info->ResumeKey; | |
580 | } | |
581 | ||
582 | static int cifs_fill_dirent(struct cifs_dirent *de, const void *info, | |
583 | u16 level, bool is_unicode) | |
584 | { | |
585 | memset(de, 0, sizeof(*de)); | |
586 | ||
587 | switch (level) { | |
3d519bd1 AA |
588 | case SMB_FIND_FILE_POSIX_INFO: |
589 | cifs_fill_dirent_posix(de, info); | |
590 | break; | |
cda0ec6a CH |
591 | case SMB_FIND_FILE_UNIX: |
592 | cifs_fill_dirent_unix(de, info, is_unicode); | |
593 | break; | |
594 | case SMB_FIND_FILE_DIRECTORY_INFO: | |
595 | cifs_fill_dirent_dir(de, info); | |
596 | break; | |
597 | case SMB_FIND_FILE_FULL_DIRECTORY_INFO: | |
598 | cifs_fill_dirent_full(de, info); | |
599 | break; | |
600 | case SMB_FIND_FILE_ID_FULL_DIR_INFO: | |
601 | cifs_fill_dirent_search(de, info); | |
602 | break; | |
603 | case SMB_FIND_FILE_BOTH_DIRECTORY_INFO: | |
604 | cifs_fill_dirent_both(de, info); | |
605 | break; | |
606 | case SMB_FIND_FILE_INFO_STANDARD: | |
607 | cifs_fill_dirent_std(de, info); | |
608 | break; | |
609 | default: | |
f96637be | 610 | cifs_dbg(FYI, "Unknown findfirst level %d\n", level); |
cda0ec6a CH |
611 | return -EINVAL; |
612 | } | |
613 | ||
614 | return 0; | |
615 | } | |
616 | ||
1da177e4 LT |
617 | #define UNICODE_DOT cpu_to_le16(0x2e) |
618 | ||
619 | /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */ | |
cda0ec6a | 620 | static int cifs_entry_is_dot(struct cifs_dirent *de, bool is_unicode) |
1da177e4 LT |
621 | { |
622 | int rc = 0; | |
1da177e4 | 623 | |
cda0ec6a CH |
624 | if (!de->name) |
625 | return 0; | |
1da177e4 | 626 | |
cda0ec6a CH |
627 | if (is_unicode) { |
628 | __le16 *ufilename = (__le16 *)de->name; | |
629 | if (de->namelen == 2) { | |
630 | /* check for . */ | |
631 | if (ufilename[0] == UNICODE_DOT) | |
632 | rc = 1; | |
633 | } else if (de->namelen == 4) { | |
634 | /* check for .. */ | |
635 | if (ufilename[0] == UNICODE_DOT && | |
636 | ufilename[1] == UNICODE_DOT) | |
637 | rc = 2; | |
638 | } | |
639 | } else /* ASCII */ { | |
640 | if (de->namelen == 1) { | |
641 | if (de->name[0] == '.') | |
642 | rc = 1; | |
643 | } else if (de->namelen == 2) { | |
644 | if (de->name[0] == '.' && de->name[1] == '.') | |
645 | rc = 2; | |
1da177e4 LT |
646 | } |
647 | } | |
648 | ||
649 | return rc; | |
650 | } | |
651 | ||
eafe8701 SF |
652 | /* Check if directory that we are searching has changed so we can decide |
653 | whether we can use the cached search results from the previous search */ | |
3870253e | 654 | static int is_dir_changed(struct file *file) |
eafe8701 | 655 | { |
496ad9aa | 656 | struct inode *inode = file_inode(file); |
c33f8d32 | 657 | struct cifsInodeInfo *cifsInfo = CIFS_I(inode); |
eafe8701 | 658 | |
c33f8d32 | 659 | if (cifsInfo->time == 0) |
eafe8701 SF |
660 | return 1; /* directory was changed, perhaps due to unlink */ |
661 | else | |
662 | return 0; | |
663 | ||
664 | } | |
665 | ||
0752f152 | 666 | static int cifs_save_resume_key(const char *current_entry, |
eaf35b1e | 667 | struct cifsFileInfo *file_info) |
0752f152 | 668 | { |
eaf35b1e CH |
669 | struct cifs_dirent de; |
670 | int rc; | |
0752f152 | 671 | |
eaf35b1e CH |
672 | rc = cifs_fill_dirent(&de, current_entry, file_info->srch_inf.info_level, |
673 | file_info->srch_inf.unicode); | |
674 | if (!rc) { | |
675 | file_info->srch_inf.presume_name = de.name; | |
676 | file_info->srch_inf.resume_name_len = de.namelen; | |
677 | file_info->srch_inf.resume_key = de.resume_key; | |
0752f152 | 678 | } |
0752f152 SF |
679 | return rc; |
680 | } | |
681 | ||
92fc65a7 PS |
682 | /* |
683 | * Find the corresponding entry in the search. Note that the SMB server returns | |
684 | * search entries for . and .. which complicates logic here if we choose to | |
685 | * parse for them and we do not assume that they are located in the findfirst | |
686 | * return buffer. We start counting in the buffer with entry 2 and increment for | |
687 | * every entry (do not increment for . or .. entry). | |
688 | */ | |
689 | static int | |
be4ccdcc | 690 | find_cifs_entry(const unsigned int xid, struct cifs_tcon *tcon, loff_t pos, |
92fc65a7 | 691 | struct file *file, char **current_entry, int *num_to_ret) |
1da177e4 | 692 | { |
2608bee7 | 693 | __u16 search_flags; |
1da177e4 LT |
694 | int rc = 0; |
695 | int pos_in_buf = 0; | |
696 | loff_t first_entry_in_buffer; | |
be4ccdcc | 697 | loff_t index_to_find = pos; |
92fc65a7 | 698 | struct cifsFileInfo *cfile = file->private_data; |
7119e220 | 699 | struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file); |
92fc65a7 | 700 | struct TCP_Server_Info *server = tcon->ses->server; |
1da177e4 | 701 | /* check if index in the buffer */ |
50c2f753 | 702 | |
92fc65a7 PS |
703 | if (!server->ops->query_dir_first || !server->ops->query_dir_next) |
704 | return -ENOSYS; | |
705 | ||
706 | if ((cfile == NULL) || (current_entry == NULL) || (num_to_ret == NULL)) | |
1da177e4 | 707 | return -ENOENT; |
50c2f753 | 708 | |
92fc65a7 PS |
709 | *current_entry = NULL; |
710 | first_entry_in_buffer = cfile->srch_inf.index_of_last_entry - | |
711 | cfile->srch_inf.entries_in_buffer; | |
60808233 | 712 | |
92fc65a7 PS |
713 | /* |
714 | * If first entry in buf is zero then is first buffer | |
715 | * in search response data which means it is likely . and .. | |
716 | * will be in this buffer, although some servers do not return | |
717 | * . and .. for the root of a drive and for those we need | |
718 | * to start two entries earlier. | |
719 | */ | |
60808233 | 720 | |
3979877e | 721 | dump_cifs_file_struct(file, "In fce "); |
92fc65a7 PS |
722 | if (((index_to_find < cfile->srch_inf.index_of_last_entry) && |
723 | is_dir_changed(file)) || (index_to_find < first_entry_in_buffer)) { | |
1da177e4 | 724 | /* close and restart search */ |
f96637be | 725 | cifs_dbg(FYI, "search backing up - close and restart search\n"); |
3afca265 | 726 | spin_lock(&cfile->file_info_lock); |
52755808 | 727 | if (server->ops->dir_needs_close(cfile)) { |
92fc65a7 | 728 | cfile->invalidHandle = true; |
3afca265 | 729 | spin_unlock(&cfile->file_info_lock); |
f736906a PS |
730 | if (server->ops->close_dir) |
731 | server->ops->close_dir(xid, tcon, &cfile->fid); | |
ddb4cbfc | 732 | } else |
3afca265 | 733 | spin_unlock(&cfile->file_info_lock); |
92fc65a7 | 734 | if (cfile->srch_inf.ntwrk_buf_start) { |
f96637be | 735 | cifs_dbg(FYI, "freeing SMB ff cache buf on search rewind\n"); |
92fc65a7 PS |
736 | if (cfile->srch_inf.smallBuf) |
737 | cifs_small_buf_release(cfile->srch_inf. | |
d47d7c1a SF |
738 | ntwrk_buf_start); |
739 | else | |
92fc65a7 | 740 | cifs_buf_release(cfile->srch_inf. |
d47d7c1a | 741 | ntwrk_buf_start); |
92fc65a7 | 742 | cfile->srch_inf.ntwrk_buf_start = NULL; |
1da177e4 | 743 | } |
3870253e | 744 | rc = initiate_cifs_search(xid, file); |
4523cc30 | 745 | if (rc) { |
f96637be | 746 | cifs_dbg(FYI, "error %d reinitiating a search on rewind\n", |
b6b38f70 | 747 | rc); |
1da177e4 LT |
748 | return rc; |
749 | } | |
7023676f | 750 | /* FindFirst/Next set last_entry to NULL on malformed reply */ |
92fc65a7 PS |
751 | if (cfile->srch_inf.last_entry) |
752 | cifs_save_resume_key(cfile->srch_inf.last_entry, cfile); | |
1da177e4 LT |
753 | } |
754 | ||
2608bee7 SP |
755 | search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME; |
756 | if (backup_cred(cifs_sb)) | |
757 | search_flags |= CIFS_SEARCH_BACKUP_SEARCH; | |
758 | ||
92fc65a7 PS |
759 | while ((index_to_find >= cfile->srch_inf.index_of_last_entry) && |
760 | (rc == 0) && !cfile->srch_inf.endOfSearch) { | |
f96637be | 761 | cifs_dbg(FYI, "calling findnext2\n"); |
92fc65a7 PS |
762 | rc = server->ops->query_dir_next(xid, tcon, &cfile->fid, |
763 | search_flags, | |
764 | &cfile->srch_inf); | |
7023676f | 765 | /* FindFirst/Next set last_entry to NULL on malformed reply */ |
92fc65a7 PS |
766 | if (cfile->srch_inf.last_entry) |
767 | cifs_save_resume_key(cfile->srch_inf.last_entry, cfile); | |
4523cc30 | 768 | if (rc) |
1da177e4 LT |
769 | return -ENOENT; |
770 | } | |
92fc65a7 | 771 | if (index_to_find < cfile->srch_inf.index_of_last_entry) { |
1da177e4 LT |
772 | /* we found the buffer that contains the entry */ |
773 | /* scan and find it */ | |
774 | int i; | |
92fc65a7 | 775 | char *cur_ent; |
59a63e47 RS |
776 | char *end_of_smb; |
777 | ||
778 | if (cfile->srch_inf.ntwrk_buf_start == NULL) { | |
779 | cifs_dbg(VFS, "ntwrk_buf_start is NULL during readdir\n"); | |
780 | return -EIO; | |
781 | } | |
782 | ||
783 | end_of_smb = cfile->srch_inf.ntwrk_buf_start + | |
92fc65a7 | 784 | server->ops->calc_smb_size( |
9ec672bd RS |
785 | cfile->srch_inf.ntwrk_buf_start, |
786 | server); | |
92fc65a7 PS |
787 | |
788 | cur_ent = cfile->srch_inf.srch_entries_start; | |
789 | first_entry_in_buffer = cfile->srch_inf.index_of_last_entry | |
790 | - cfile->srch_inf.entries_in_buffer; | |
1da177e4 | 791 | pos_in_buf = index_to_find - first_entry_in_buffer; |
f96637be | 792 | cifs_dbg(FYI, "found entry - pos_in_buf %d\n", pos_in_buf); |
5bafd765 | 793 | |
92fc65a7 | 794 | for (i = 0; (i < (pos_in_buf)) && (cur_ent != NULL); i++) { |
dfb7533b | 795 | /* go entry by entry figuring out which is first */ |
92fc65a7 PS |
796 | cur_ent = nxt_dir_entry(cur_ent, end_of_smb, |
797 | cfile->srch_inf.info_level); | |
1da177e4 | 798 | } |
92fc65a7 | 799 | if ((cur_ent == NULL) && (i < pos_in_buf)) { |
1da177e4 | 800 | /* BB fixme - check if we should flag this error */ |
f96637be JP |
801 | cifs_dbg(VFS, "reached end of buf searching for pos in buf %d index to find %lld rc %d\n", |
802 | pos_in_buf, index_to_find, rc); | |
1da177e4 LT |
803 | } |
804 | rc = 0; | |
92fc65a7 | 805 | *current_entry = cur_ent; |
1da177e4 | 806 | } else { |
f96637be | 807 | cifs_dbg(FYI, "index not in buffer - could not findnext into it\n"); |
1da177e4 LT |
808 | return 0; |
809 | } | |
810 | ||
92fc65a7 | 811 | if (pos_in_buf >= cfile->srch_inf.entries_in_buffer) { |
f96637be | 812 | cifs_dbg(FYI, "can not return entries pos_in_buf beyond last\n"); |
1da177e4 LT |
813 | *num_to_ret = 0; |
814 | } else | |
92fc65a7 | 815 | *num_to_ret = cfile->srch_inf.entries_in_buffer - pos_in_buf; |
1da177e4 LT |
816 | |
817 | return rc; | |
818 | } | |
819 | ||
be4ccdcc AV |
820 | static int cifs_filldir(char *find_entry, struct file *file, |
821 | struct dir_context *ctx, | |
822 | char *scratch_buf, unsigned int max_len) | |
1da177e4 | 823 | { |
9feed6f8 | 824 | struct cifsFileInfo *file_info = file->private_data; |
7119e220 | 825 | struct super_block *sb = file_inode(file)->i_sb; |
9feed6f8 | 826 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
cda0ec6a | 827 | struct cifs_dirent de = { NULL, }; |
cc0bad75 | 828 | struct cifs_fattr fattr; |
9feed6f8 | 829 | struct qstr name; |
1da177e4 | 830 | int rc = 0; |
9feed6f8 | 831 | ino_t ino; |
1da177e4 | 832 | |
cda0ec6a CH |
833 | rc = cifs_fill_dirent(&de, find_entry, file_info->srch_inf.info_level, |
834 | file_info->srch_inf.unicode); | |
835 | if (rc) | |
836 | return rc; | |
5bafd765 | 837 | |
f16d59b4 | 838 | if (de.namelen > max_len) { |
f96637be JP |
839 | cifs_dbg(VFS, "bad search response length %zd past smb end\n", |
840 | de.namelen); | |
5bafd765 SF |
841 | return -EINVAL; |
842 | } | |
843 | ||
60808233 | 844 | /* skip . and .. since we added them first */ |
cda0ec6a | 845 | if (cifs_entry_is_dot(&de, file_info->srch_inf.unicode)) |
60808233 SF |
846 | return 0; |
847 | ||
f16d59b4 CH |
848 | if (file_info->srch_inf.unicode) { |
849 | struct nls_table *nlt = cifs_sb->local_nls; | |
b693855f SF |
850 | int map_type; |
851 | ||
2baa2682 | 852 | map_type = cifs_remap(cifs_sb); |
f16d59b4 CH |
853 | name.name = scratch_buf; |
854 | name.len = | |
acbbb76a SF |
855 | cifs_from_utf16((char *)name.name, (__le16 *)de.name, |
856 | UNICODE_NAME_MAX, | |
857 | min_t(size_t, de.namelen, | |
b693855f | 858 | (size_t)max_len), nlt, map_type); |
f16d59b4 CH |
859 | name.len -= nls_nullsize(nlt); |
860 | } else { | |
861 | name.name = de.name; | |
862 | name.len = de.namelen; | |
863 | } | |
1da177e4 | 864 | |
9feed6f8 | 865 | switch (file_info->srch_inf.info_level) { |
3d519bd1 AA |
866 | case SMB_FIND_FILE_POSIX_INFO: |
867 | cifs_posix_to_fattr(&fattr, | |
868 | (struct smb2_posix_info *)find_entry, | |
869 | cifs_sb); | |
870 | break; | |
9feed6f8 | 871 | case SMB_FIND_FILE_UNIX: |
cc0bad75 | 872 | cifs_unix_basic_to_fattr(&fattr, |
9feed6f8 CH |
873 | &((FILE_UNIX_INFO *)find_entry)->basic, |
874 | cifs_sb); | |
875 | break; | |
876 | case SMB_FIND_FILE_INFO_STANDARD: | |
877 | cifs_std_info_to_fattr(&fattr, | |
878 | (FIND_FILE_STANDARD_INFO *)find_entry, | |
879 | cifs_sb); | |
880 | break; | |
046aca3c PAS |
881 | case SMB_FIND_FILE_ID_FULL_DIR_INFO: |
882 | cifs_fulldir_info_to_fattr(&fattr, | |
883 | (SEARCH_ID_FULL_DIR_INFO *)find_entry, | |
884 | cifs_sb); | |
885 | break; | |
9feed6f8 CH |
886 | default: |
887 | cifs_dir_info_to_fattr(&fattr, | |
888 | (FILE_DIRECTORY_INFO *)find_entry, | |
889 | cifs_sb); | |
890 | break; | |
891 | } | |
b835bebe | 892 | |
f16d59b4 CH |
893 | if (de.ino && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
894 | fattr.cf_uniqueid = de.ino; | |
ec06aedd | 895 | } else { |
0b8f18e3 | 896 | fattr.cf_uniqueid = iunique(sb, ROOT_I); |
ec06aedd JL |
897 | cifs_autodisable_serverino(cifs_sb); |
898 | } | |
50c2f753 | 899 | |
1b12b9c1 | 900 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) && |
cb084b1a | 901 | couldbe_mf_symlink(&fattr)) |
1b12b9c1 SM |
902 | /* |
903 | * trying to get the type and mode can be slow, | |
904 | * so just call those regular files for now, and mark | |
905 | * for reval | |
906 | */ | |
907 | fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; | |
908 | ||
1f1735cb | 909 | cifs_prime_dcache(file_dentry(file), &name, &fattr); |
3870253e | 910 | |
eb1b3fa5 | 911 | ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid); |
be4ccdcc | 912 | return !dir_emit(ctx, name.name, name.len, ino, fattr.cf_dtype); |
1da177e4 LT |
913 | } |
914 | ||
1da177e4 | 915 | |
be4ccdcc | 916 | int cifs_readdir(struct file *file, struct dir_context *ctx) |
1da177e4 LT |
917 | { |
918 | int rc = 0; | |
6d5786a3 PS |
919 | unsigned int xid; |
920 | int i; | |
92fc65a7 | 921 | struct cifs_tcon *tcon; |
1da177e4 | 922 | struct cifsFileInfo *cifsFile = NULL; |
3870253e | 923 | char *current_entry; |
1da177e4 | 924 | int num_to_fill = 0; |
3870253e | 925 | char *tmp_buf = NULL; |
50c2f753 | 926 | char *end_of_smb; |
18295796 | 927 | unsigned int max_len; |
1da177e4 | 928 | |
6d5786a3 | 929 | xid = get_xid(); |
1da177e4 | 930 | |
6221ddd0 SJ |
931 | /* |
932 | * Ensure FindFirst doesn't fail before doing filldir() for '.' and | |
933 | * '..'. Otherwise we won't be able to notify VFS in case of failure. | |
934 | */ | |
935 | if (file->private_data == NULL) { | |
936 | rc = initiate_cifs_search(xid, file); | |
f96637be | 937 | cifs_dbg(FYI, "initiate cifs search rc %d\n", rc); |
6221ddd0 SJ |
938 | if (rc) |
939 | goto rddir2_exit; | |
940 | } | |
941 | ||
be4ccdcc AV |
942 | if (!dir_emit_dots(file, ctx)) |
943 | goto rddir2_exit; | |
1da177e4 | 944 | |
be4ccdcc AV |
945 | /* 1) If search is active, |
946 | is in current search buffer? | |
947 | if it before then restart search | |
948 | if after then keep searching till find it */ | |
949 | ||
be4ccdcc AV |
950 | cifsFile = file->private_data; |
951 | if (cifsFile->srch_inf.endOfSearch) { | |
952 | if (cifsFile->srch_inf.emptyDir) { | |
953 | cifs_dbg(FYI, "End of search, empty dir\n"); | |
954 | rc = 0; | |
1da177e4 LT |
955 | goto rddir2_exit; |
956 | } | |
be4ccdcc AV |
957 | } /* else { |
958 | cifsFile->invalidHandle = true; | |
959 | tcon->ses->server->close(xid, tcon, &cifsFile->fid); | |
960 | } */ | |
961 | ||
962 | tcon = tlink_tcon(cifsFile->tlink); | |
963 | rc = find_cifs_entry(xid, tcon, ctx->pos, file, ¤t_entry, | |
964 | &num_to_fill); | |
965 | if (rc) { | |
966 | cifs_dbg(FYI, "fce error %d\n", rc); | |
967 | goto rddir2_exit; | |
968 | } else if (current_entry != NULL) { | |
969 | cifs_dbg(FYI, "entry %lld found\n", ctx->pos); | |
970 | } else { | |
a0a3036b | 971 | cifs_dbg(FYI, "Could not find entry\n"); |
be4ccdcc AV |
972 | goto rddir2_exit; |
973 | } | |
974 | cifs_dbg(FYI, "loop through %d times filling dir for net buf %p\n", | |
975 | num_to_fill, cifsFile->srch_inf.ntwrk_buf_start); | |
976 | max_len = tcon->ses->server->ops->calc_smb_size( | |
9ec672bd RS |
977 | cifsFile->srch_inf.ntwrk_buf_start, |
978 | tcon->ses->server); | |
be4ccdcc AV |
979 | end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len; |
980 | ||
981 | tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL); | |
982 | if (tmp_buf == NULL) { | |
983 | rc = -ENOMEM; | |
984 | goto rddir2_exit; | |
985 | } | |
986 | ||
987 | for (i = 0; i < num_to_fill; i++) { | |
988 | if (current_entry == NULL) { | |
989 | /* evaluate whether this case is an error */ | |
990 | cifs_dbg(VFS, "past SMB end, num to fill %d i %d\n", | |
991 | num_to_fill, i); | |
f55fdcca KV |
992 | break; |
993 | } | |
be4ccdcc AV |
994 | /* |
995 | * if buggy server returns . and .. late do we want to | |
996 | * check for that here? | |
997 | */ | |
01b9b0b2 | 998 | *tmp_buf = 0; |
be4ccdcc AV |
999 | rc = cifs_filldir(current_entry, file, ctx, |
1000 | tmp_buf, max_len); | |
1001 | if (rc) { | |
1002 | if (rc > 0) | |
7ca85ba7 | 1003 | rc = 0; |
be4ccdcc | 1004 | break; |
1da177e4 | 1005 | } |
be4ccdcc AV |
1006 | |
1007 | ctx->pos++; | |
1008 | if (ctx->pos == | |
1009 | cifsFile->srch_inf.index_of_last_entry) { | |
1010 | cifs_dbg(FYI, "last entry in buf at pos %lld %s\n", | |
1011 | ctx->pos, tmp_buf); | |
1012 | cifs_save_resume_key(current_entry, cifsFile); | |
1013 | break; | |
1014 | } else | |
1015 | current_entry = | |
1016 | nxt_dir_entry(current_entry, end_of_smb, | |
1017 | cifsFile->srch_inf.info_level); | |
1018 | } | |
1019 | kfree(tmp_buf); | |
1da177e4 LT |
1020 | |
1021 | rddir2_exit: | |
6d5786a3 | 1022 | free_xid(xid); |
1da177e4 LT |
1023 | return rc; |
1024 | } |