4 * Directory search handling
6 * Copyright (C) International Business Machines Corp., 2004, 2005
7 * Author(s): Steve French (sfrench@us.ibm.com)
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.
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.
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
24 #include <linux/stat.h>
25 #include <linux/smp_lock.h>
28 #include "cifsproto.h"
29 #include "cifs_unicode.h"
30 #include "cifs_debug.h"
31 #include "cifs_fs_sb.h"
34 /* BB fixme - add debug wrappers around this function to disable it fixme BB */
35 /* static void dump_cifs_file_struct(struct file *file, char *label)
37 struct cifsFileInfo * cf;
40 cf = file->private_data;
42 cFYI(1,("empty cifs private file data"));
45 if(cf->invalidHandle) {
46 cFYI(1,("invalid handle"));
48 if(cf->srch_inf.endOfSearch) {
49 cFYI(1,("end of search"));
51 if(cf->srch_inf.emptyDir) {
52 cFYI(1,("empty dir"));
58 /* Returns one if new inode created (which therefore needs to be hashed) */
59 /* Might check in the future if inode number changed so we can rehash inode */
60 static int construct_dentry(struct qstr *qstring, struct file *file,
61 struct inode **ptmp_inode, struct dentry **pnew_dentry)
63 struct dentry *tmp_dentry;
64 struct cifs_sb_info *cifs_sb;
65 struct cifsTconInfo *pTcon;
68 cFYI(1, ("For %s", qstring->name));
69 cifs_sb = CIFS_SB(file->f_dentry->d_sb);
70 pTcon = cifs_sb->tcon;
72 qstring->hash = full_name_hash(qstring->name, qstring->len);
73 tmp_dentry = d_lookup(file->f_dentry, qstring);
75 cFYI(0, ("existing dentry with inode 0x%p", tmp_dentry->d_inode));
76 *ptmp_inode = tmp_dentry->d_inode;
77 /* BB overwrite old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len??*/
78 if(*ptmp_inode == NULL) {
79 *ptmp_inode = new_inode(file->f_dentry->d_sb);
80 if(*ptmp_inode == NULL)
83 d_instantiate(tmp_dentry, *ptmp_inode);
86 tmp_dentry = d_alloc(file->f_dentry, qstring);
87 if(tmp_dentry == NULL) {
88 cERROR(1,("Failed allocating dentry"));
93 *ptmp_inode = new_inode(file->f_dentry->d_sb);
95 tmp_dentry->d_op = &cifs_ci_dentry_ops;
97 tmp_dentry->d_op = &cifs_dentry_ops;
98 if(*ptmp_inode == NULL)
101 d_instantiate(tmp_dentry, *ptmp_inode);
102 d_rehash(tmp_dentry);
105 tmp_dentry->d_time = jiffies;
106 *pnew_dentry = tmp_dentry;
110 static void fill_in_inode(struct inode *tmp_inode,
111 FILE_DIRECTORY_INFO *pfindData, int *pobject_type, int isNewInode)
114 struct timespec local_mtime;
116 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
117 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
118 __u32 attr = le32_to_cpu(pfindData->ExtFileAttributes);
119 __u64 allocation_size = le64_to_cpu(pfindData->AllocationSize);
120 __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile);
122 cifsInfo->cifsAttrs = attr;
123 cifsInfo->time = jiffies;
125 /* save mtime and size */
126 local_mtime = tmp_inode->i_mtime;
127 local_size = tmp_inode->i_size;
129 /* Linux can not store file creation time unfortunately so ignore it */
131 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
133 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
135 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
136 /* treat dos attribute of read-only as read-only mode bit e.g. 555? */
137 /* 2767 perms - indicate mandatory locking */
138 /* BB fill in uid and gid here? with help from winbind?
139 or retrieve from NTFS stream extended attribute */
140 if (atomic_read(&cifsInfo->inUse) == 0) {
141 tmp_inode->i_uid = cifs_sb->mnt_uid;
142 tmp_inode->i_gid = cifs_sb->mnt_gid;
143 /* set default mode. will override for dirs below */
144 tmp_inode->i_mode = cifs_sb->mnt_file_mode;
146 /* mask off the type bits since it gets set
147 below and we do not want to get two type
149 tmp_inode->i_mode &= ~S_IFMT;
152 if (attr & ATTR_DIRECTORY) {
153 *pobject_type = DT_DIR;
154 /* override default perms since we do not lock dirs */
155 if(atomic_read(&cifsInfo->inUse) == 0) {
156 tmp_inode->i_mode = cifs_sb->mnt_dir_mode;
158 tmp_inode->i_mode |= S_IFDIR;
159 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
160 (attr & ATTR_SYSTEM)) {
161 if (end_of_file == 0) {
162 *pobject_type = DT_FIFO;
163 tmp_inode->i_mode |= S_IFIFO;
165 /* rather than get the type here, we mark the
166 inode as needing revalidate and get the real type
167 (blk vs chr vs. symlink) later ie in lookup */
168 *pobject_type = DT_REG;
169 tmp_inode->i_mode |= S_IFREG;
172 /* we no longer mark these because we could not follow them */
173 /* } else if (attr & ATTR_REPARSE) {
174 *pobject_type = DT_LNK;
175 tmp_inode->i_mode |= S_IFLNK; */
177 *pobject_type = DT_REG;
178 tmp_inode->i_mode |= S_IFREG;
179 if (attr & ATTR_READONLY)
180 tmp_inode->i_mode &= ~(S_IWUGO);
181 } /* could add code here - to validate if device or weird share type? */
183 /* can not fill in nlink here as in qpathinfo version and Unx search */
184 if (atomic_read(&cifsInfo->inUse) == 0) {
185 atomic_set(&cifsInfo->inUse, 1);
188 if (is_size_safe_to_change(cifsInfo)) {
189 /* can not safely change the file size here if the
190 client is writing to it due to potential races */
191 i_size_write(tmp_inode, end_of_file);
193 /* 512 bytes (2**9) is the fake blocksize that must be used */
194 /* for this calculation, even though the reported blocksize is larger */
195 tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9;
198 if (allocation_size < end_of_file)
199 cFYI(1, ("May be sparse file, allocation less than file size"));
201 ("File Size %ld and blocks %ld and blocksize %ld",
202 (unsigned long)tmp_inode->i_size, tmp_inode->i_blocks,
203 tmp_inode->i_blksize));
204 if (S_ISREG(tmp_inode->i_mode)) {
205 cFYI(1, ("File inode"));
206 tmp_inode->i_op = &cifs_file_inode_ops;
207 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
208 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
209 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
211 tmp_inode->i_fop = &cifs_file_direct_ops;
213 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
214 tmp_inode->i_fop = &cifs_file_nobrl_ops;
216 tmp_inode->i_fop = &cifs_file_ops;
218 tmp_inode->i_data.a_ops = &cifs_addr_ops;
219 if((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
220 (cifs_sb->tcon->ses->server->maxBuf <
221 4096 + MAX_CIFS_HDR_SIZE))
222 tmp_inode->i_data.a_ops->readpages = NULL;
224 return; /* No sense invalidating pages for new inode
225 since have not started caching readahead file
228 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
229 (local_size == tmp_inode->i_size)) {
230 cFYI(1, ("inode exists but unchanged"));
232 /* file may have changed on server */
233 cFYI(1, ("invalidate inode, readdir detected change"));
234 invalidate_remote_inode(tmp_inode);
236 } else if (S_ISDIR(tmp_inode->i_mode)) {
237 cFYI(1, ("Directory inode"));
238 tmp_inode->i_op = &cifs_dir_inode_ops;
239 tmp_inode->i_fop = &cifs_dir_ops;
240 } else if (S_ISLNK(tmp_inode->i_mode)) {
241 cFYI(1, ("Symbolic Link inode"));
242 tmp_inode->i_op = &cifs_symlink_inode_ops;
244 cFYI(1, ("Init special inode"));
245 init_special_inode(tmp_inode, tmp_inode->i_mode,
250 static void unix_fill_in_inode(struct inode *tmp_inode,
251 FILE_UNIX_INFO *pfindData, int *pobject_type, int isNewInode)
254 struct timespec local_mtime;
256 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
257 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
259 __u32 type = le32_to_cpu(pfindData->Type);
260 __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes);
261 __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile);
262 cifsInfo->time = jiffies;
263 atomic_inc(&cifsInfo->inUse);
265 /* save mtime and size */
266 local_mtime = tmp_inode->i_mtime;
267 local_size = tmp_inode->i_size;
270 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
272 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime));
274 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange));
276 tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions);
277 /* since we set the inode type below we need to mask off type
278 to avoid strange results if bits above were corrupt */
279 tmp_inode->i_mode &= ~S_IFMT;
280 if (type == UNIX_FILE) {
281 *pobject_type = DT_REG;
282 tmp_inode->i_mode |= S_IFREG;
283 } else if (type == UNIX_SYMLINK) {
284 *pobject_type = DT_LNK;
285 tmp_inode->i_mode |= S_IFLNK;
286 } else if (type == UNIX_DIR) {
287 *pobject_type = DT_DIR;
288 tmp_inode->i_mode |= S_IFDIR;
289 } else if (type == UNIX_CHARDEV) {
290 *pobject_type = DT_CHR;
291 tmp_inode->i_mode |= S_IFCHR;
292 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
293 le64_to_cpu(pfindData->DevMinor) & MINORMASK);
294 } else if (type == UNIX_BLOCKDEV) {
295 *pobject_type = DT_BLK;
296 tmp_inode->i_mode |= S_IFBLK;
297 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
298 le64_to_cpu(pfindData->DevMinor) & MINORMASK);
299 } else if (type == UNIX_FIFO) {
300 *pobject_type = DT_FIFO;
301 tmp_inode->i_mode |= S_IFIFO;
302 } else if (type == UNIX_SOCKET) {
303 *pobject_type = DT_SOCK;
304 tmp_inode->i_mode |= S_IFSOCK;
306 /* safest to just call it a file */
307 *pobject_type = DT_REG;
308 tmp_inode->i_mode |= S_IFREG;
309 cFYI(1,("unknown inode type %d",type));
312 tmp_inode->i_uid = le64_to_cpu(pfindData->Uid);
313 tmp_inode->i_gid = le64_to_cpu(pfindData->Gid);
314 tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks);
316 if (is_size_safe_to_change(cifsInfo)) {
317 /* can not safely change the file size here if the
318 client is writing to it due to potential races */
319 i_size_write(tmp_inode,end_of_file);
321 /* 512 bytes (2**9) is the fake blocksize that must be used */
322 /* for this calculation, not the real blocksize */
323 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
326 if (S_ISREG(tmp_inode->i_mode)) {
327 cFYI(1, ("File inode"));
328 tmp_inode->i_op = &cifs_file_inode_ops;
330 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
331 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
332 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
334 tmp_inode->i_fop = &cifs_file_direct_ops;
336 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
337 tmp_inode->i_fop = &cifs_file_nobrl_ops;
339 tmp_inode->i_fop = &cifs_file_ops;
341 tmp_inode->i_data.a_ops = &cifs_addr_ops;
342 if((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
343 (cifs_sb->tcon->ses->server->maxBuf <
344 4096 + MAX_CIFS_HDR_SIZE))
345 tmp_inode->i_data.a_ops->readpages = NULL;
348 return; /* No sense invalidating pages for new inode since we
349 have not started caching readahead file data yet */
351 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
352 (local_size == tmp_inode->i_size)) {
353 cFYI(1, ("inode exists but unchanged"));
355 /* file may have changed on server */
356 cFYI(1, ("invalidate inode, readdir detected change"));
357 invalidate_remote_inode(tmp_inode);
359 } else if (S_ISDIR(tmp_inode->i_mode)) {
360 cFYI(1, ("Directory inode"));
361 tmp_inode->i_op = &cifs_dir_inode_ops;
362 tmp_inode->i_fop = &cifs_dir_ops;
363 } else if (S_ISLNK(tmp_inode->i_mode)) {
364 cFYI(1, ("Symbolic Link inode"));
365 tmp_inode->i_op = &cifs_symlink_inode_ops;
366 /* tmp_inode->i_fop = *//* do not need to set to anything */
368 cFYI(1, ("Special inode"));
369 init_special_inode(tmp_inode, tmp_inode->i_mode,
374 static int initiate_cifs_search(const int xid, struct file *file)
378 struct cifsFileInfo * cifsFile;
379 struct cifs_sb_info *cifs_sb;
380 struct cifsTconInfo *pTcon;
382 if(file->private_data == NULL) {
384 kmalloc(sizeof(struct cifsFileInfo),GFP_KERNEL);
387 if(file->private_data == NULL) {
390 memset(file->private_data,0,sizeof(struct cifsFileInfo));
392 cifsFile = file->private_data;
393 cifsFile->invalidHandle = TRUE;
394 cifsFile->srch_inf.endOfSearch = FALSE;
396 if(file->f_dentry == NULL)
399 cifs_sb = CIFS_SB(file->f_dentry->d_sb);
403 pTcon = cifs_sb->tcon;
407 down(&file->f_dentry->d_sb->s_vfs_rename_sem);
408 full_path = build_path_from_dentry(file->f_dentry);
409 up(&file->f_dentry->d_sb->s_vfs_rename_sem);
411 if(full_path == NULL) {
415 cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos));
418 /* test for Unix extensions */
419 if (pTcon->ses->capabilities & CAP_UNIX) {
420 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
421 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
422 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
423 } else /* not srvinos - BB fixme add check for backlevel? */ {
424 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
427 rc = CIFSFindFirst(xid, pTcon,full_path,cifs_sb->local_nls,
428 &cifsFile->netfid, &cifsFile->srch_inf,
429 cifs_sb->mnt_cifs_flags &
430 CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
432 cifsFile->invalidHandle = FALSE;
433 if((rc == -EOPNOTSUPP) &&
434 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
435 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
442 /* return length of unicode string in bytes */
443 static int cifs_unicode_bytelen(char *str)
446 __le16 * ustr = (__le16 *)str;
448 for(len=0;len <= PATH_MAX;len++) {
452 cFYI(1,("Unicode string longer than PATH_MAX found"));
456 static char *nxt_dir_entry(char *old_entry, char *end_of_smb)
459 FILE_DIRECTORY_INFO * pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
461 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
462 cFYI(1,("new entry %p old entry %p",new_entry,old_entry));
463 /* validate that new_entry is not past end of SMB */
464 if(new_entry >= end_of_smb) {
466 ("search entry %p began after end of SMB %p old entry %p",
467 new_entry, end_of_smb, old_entry));
469 } else if (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb) {
470 cERROR(1,("search entry %p extends after end of SMB %p",
471 new_entry, end_of_smb));
478 #define UNICODE_DOT cpu_to_le16(0x2e)
480 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
481 static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile)
484 char * filename = NULL;
487 if(cfile->srch_inf.info_level == 0x202) {
488 FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
489 filename = &pFindData->FileName[0];
490 if(cfile->srch_inf.unicode) {
491 len = cifs_unicode_bytelen(filename);
493 /* BB should we make this strnlen of PATH_MAX? */
494 len = strnlen(filename, 5);
496 } else if(cfile->srch_inf.info_level == 0x101) {
497 FILE_DIRECTORY_INFO * pFindData =
498 (FILE_DIRECTORY_INFO *)current_entry;
499 filename = &pFindData->FileName[0];
500 len = le32_to_cpu(pFindData->FileNameLength);
501 } else if(cfile->srch_inf.info_level == 0x102) {
502 FILE_FULL_DIRECTORY_INFO * pFindData =
503 (FILE_FULL_DIRECTORY_INFO *)current_entry;
504 filename = &pFindData->FileName[0];
505 len = le32_to_cpu(pFindData->FileNameLength);
506 } else if(cfile->srch_inf.info_level == 0x105) {
507 SEARCH_ID_FULL_DIR_INFO * pFindData =
508 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
509 filename = &pFindData->FileName[0];
510 len = le32_to_cpu(pFindData->FileNameLength);
511 } else if(cfile->srch_inf.info_level == 0x104) {
512 FILE_BOTH_DIRECTORY_INFO * pFindData =
513 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
514 filename = &pFindData->FileName[0];
515 len = le32_to_cpu(pFindData->FileNameLength);
517 cFYI(1,("Unknown findfirst level %d",cfile->srch_inf.info_level));
521 if(cfile->srch_inf.unicode) {
522 __le16 *ufilename = (__le16 *)filename;
525 if(ufilename[0] == UNICODE_DOT)
527 } else if(len == 4) {
529 if((ufilename[0] == UNICODE_DOT)
530 &&(ufilename[1] == UNICODE_DOT))
535 if(filename[0] == '.')
537 } else if(len == 2) {
538 if((filename[0] == '.') && (filename[1] == '.'))
547 /* Check if directory that we are searching has changed so we can decide
548 whether we can use the cached search results from the previous search */
549 static int is_dir_changed(struct file * file)
551 struct inode * inode;
552 struct cifsInodeInfo *cifsInfo;
554 if(file->f_dentry == NULL)
557 inode = file->f_dentry->d_inode;
562 cifsInfo = CIFS_I(inode);
564 if(cifsInfo->time == 0)
565 return 1; /* directory was changed, perhaps due to unlink */
571 /* find the corresponding entry in the search */
572 /* Note that the SMB server returns search entries for . and .. which
573 complicates logic here if we choose to parse for them and we do not
574 assume that they are located in the findfirst return buffer.*/
575 /* We start counting in the buffer with entry 2 and increment for every
576 entry (do not increment for . or .. entry) */
577 static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
578 struct file *file, char **ppCurrentEntry, int *num_to_ret)
582 loff_t first_entry_in_buffer;
583 loff_t index_to_find = file->f_pos;
584 struct cifsFileInfo * cifsFile = file->private_data;
585 /* check if index in the buffer */
587 if((cifsFile == NULL) || (ppCurrentEntry == NULL) ||
588 (num_to_ret == NULL))
591 *ppCurrentEntry = NULL;
592 first_entry_in_buffer =
593 cifsFile->srch_inf.index_of_last_entry -
594 cifsFile->srch_inf.entries_in_buffer;
595 /* dump_cifs_file_struct(file, "In fce ");*/
596 if(((index_to_find < cifsFile->srch_inf.index_of_last_entry) &&
597 is_dir_changed(file)) ||
598 (index_to_find < first_entry_in_buffer)) {
599 /* close and restart search */
600 cFYI(1,("search backing up - close and restart search"));
601 cifsFile->invalidHandle = TRUE;
602 CIFSFindClose(xid, pTcon, cifsFile->netfid);
603 kfree(cifsFile->search_resume_name);
604 cifsFile->search_resume_name = NULL;
605 if(cifsFile->srch_inf.ntwrk_buf_start) {
606 cFYI(1,("freeing SMB ff cache buf on search rewind"));
607 if(cifsFile->srch_inf.smallBuf)
608 cifs_small_buf_release(cifsFile->srch_inf.
611 cifs_buf_release(cifsFile->srch_inf.
614 rc = initiate_cifs_search(xid,file);
616 cFYI(1,("error %d reinitiating a search on rewind",rc));
621 while((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
622 (rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)){
623 cFYI(1,("calling findnext2"));
624 rc = CIFSFindNext(xid,pTcon,cifsFile->netfid,
625 &cifsFile->srch_inf);
629 if(index_to_find < cifsFile->srch_inf.index_of_last_entry) {
630 /* we found the buffer that contains the entry */
631 /* scan and find it */
633 char * current_entry;
634 char * end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
635 smbCalcSize((struct smb_hdr *)
636 cifsFile->srch_inf.ntwrk_buf_start);
637 first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
638 - cifsFile->srch_inf.entries_in_buffer;
639 pos_in_buf = index_to_find - first_entry_in_buffer;
640 cFYI(1,("found entry - pos_in_buf %d",pos_in_buf));
641 current_entry = cifsFile->srch_inf.srch_entries_start;
642 for(i=0;(i<(pos_in_buf)) && (current_entry != NULL);i++) {
643 /* go entry by entry figuring out which is first */
646 rc = cifs_entry_is_dot(current_entry,cifsFile);
647 if(rc == 1) /* is . or .. so skip */ {
648 cFYI(1,("Entry is .")); /* BB removeme BB */
650 } else if (rc == 2 ) {
651 cFYI(1,("Entry is ..")); /* BB removeme BB */
654 current_entry = nxt_dir_entry(current_entry,end_of_smb);
656 if((current_entry == NULL) && (i < pos_in_buf)) {
657 /* BB fixme - check if we should flag this error */
658 cERROR(1,("reached end of buf searching for pos in buf"
659 " %d index to find %lld rc %d",
660 pos_in_buf,index_to_find,rc));
663 *ppCurrentEntry = current_entry;
665 cFYI(1,("index not in buffer - could not findnext into it"));
669 if(pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
670 cFYI(1,("can not return entries pos_in_buf beyond last entry"));
673 *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
678 /* inode num, inode type and filename returned */
679 static int cifs_get_name_from_search_buf(struct qstr *pqst,
680 char *current_entry, __u16 level, unsigned int unicode,
681 struct cifs_sb_info * cifs_sb, ino_t *pinum)
684 unsigned int len = 0;
686 struct nls_table * nlt = cifs_sb->local_nls;
690 if(level == SMB_FIND_FILE_UNIX) {
691 FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
693 filename = &pFindData->FileName[0];
695 len = cifs_unicode_bytelen(filename);
697 /* BB should we make this strnlen of PATH_MAX? */
698 len = strnlen(filename, PATH_MAX);
701 /* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */
702 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
703 *pinum = pFindData->UniqueId;
704 } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) {
705 FILE_DIRECTORY_INFO * pFindData =
706 (FILE_DIRECTORY_INFO *)current_entry;
707 filename = &pFindData->FileName[0];
708 len = le32_to_cpu(pFindData->FileNameLength);
709 } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
710 FILE_FULL_DIRECTORY_INFO * pFindData =
711 (FILE_FULL_DIRECTORY_INFO *)current_entry;
712 filename = &pFindData->FileName[0];
713 len = le32_to_cpu(pFindData->FileNameLength);
714 } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
715 SEARCH_ID_FULL_DIR_INFO * pFindData =
716 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
717 filename = &pFindData->FileName[0];
718 len = le32_to_cpu(pFindData->FileNameLength);
719 *pinum = pFindData->UniqueId;
720 } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
721 FILE_BOTH_DIRECTORY_INFO * pFindData =
722 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
723 filename = &pFindData->FileName[0];
724 len = le32_to_cpu(pFindData->FileNameLength);
726 cFYI(1,("Unknown findfirst level %d",level));
730 /* BB fixme - test with long names */
731 /* Note converted filename can be longer than in unicode */
732 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
733 pqst->len = cifs_convertUCSpath((char *)pqst->name,
734 (__le16 *)filename, len/2, nlt);
736 pqst->len = cifs_strfromUCS_le((char *)pqst->name,
737 (__le16 *)filename,len/2,nlt);
739 pqst->name = filename;
742 pqst->hash = full_name_hash(pqst->name,pqst->len);
743 /* cFYI(1,("filldir on %s",pqst->name)); */
747 static int cifs_filldir(char *pfindEntry, struct file *file,
748 filldir_t filldir, void *direntry, char *scratch_buf)
752 struct cifsFileInfo * pCifsF;
755 struct cifs_sb_info * cifs_sb;
756 struct inode *tmp_inode;
757 struct dentry *tmp_dentry;
759 /* get filename and len into qstring */
761 /* decide whether to create and populate ionde */
762 if((direntry == NULL) || (file == NULL))
765 pCifsF = file->private_data;
767 if((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL))
770 if(file->f_dentry == NULL)
773 cifs_sb = CIFS_SB(file->f_dentry->d_sb);
775 qstring.name = scratch_buf;
776 rc = cifs_get_name_from_search_buf(&qstring,pfindEntry,
777 pCifsF->srch_inf.info_level,
778 pCifsF->srch_inf.unicode,cifs_sb,
779 &inum /* returned */);
784 rc = construct_dentry(&qstring,file,&tmp_inode, &tmp_dentry);
785 if((tmp_inode == NULL) || (tmp_dentry == NULL))
789 /* inode created, we need to hash it with right inode number */
791 /* BB fixme - hash the 2 32 quantities bits together if necessary BB */
792 tmp_inode->i_ino = inum;
794 insert_inode_hash(tmp_inode);
797 /* we pass in rc below, indicating whether it is a new inode,
798 so we can figure out whether to invalidate the inode cached
799 data if the file has changed */
800 if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) {
801 unix_fill_in_inode(tmp_inode,
802 (FILE_UNIX_INFO *)pfindEntry,&obj_type, rc);
804 fill_in_inode(tmp_inode,
805 (FILE_DIRECTORY_INFO *)pfindEntry,&obj_type, rc);
808 rc = filldir(direntry,qstring.name,qstring.len,file->f_pos,
809 tmp_inode->i_ino,obj_type);
811 cFYI(1,("filldir rc = %d",rc));
818 static int cifs_save_resume_key(const char *current_entry,
819 struct cifsFileInfo *cifsFile)
822 unsigned int len = 0;
826 if((cifsFile == NULL) || (current_entry == NULL))
829 level = cifsFile->srch_inf.info_level;
831 if(level == SMB_FIND_FILE_UNIX) {
832 FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
834 filename = &pFindData->FileName[0];
835 if(cifsFile->srch_inf.unicode) {
836 len = cifs_unicode_bytelen(filename);
838 /* BB should we make this strnlen of PATH_MAX? */
839 len = strnlen(filename, PATH_MAX);
841 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
842 } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) {
843 FILE_DIRECTORY_INFO * pFindData =
844 (FILE_DIRECTORY_INFO *)current_entry;
845 filename = &pFindData->FileName[0];
846 len = le32_to_cpu(pFindData->FileNameLength);
847 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
848 } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
849 FILE_FULL_DIRECTORY_INFO * pFindData =
850 (FILE_FULL_DIRECTORY_INFO *)current_entry;
851 filename = &pFindData->FileName[0];
852 len = le32_to_cpu(pFindData->FileNameLength);
853 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
854 } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
855 SEARCH_ID_FULL_DIR_INFO * pFindData =
856 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
857 filename = &pFindData->FileName[0];
858 len = le32_to_cpu(pFindData->FileNameLength);
859 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
860 } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
861 FILE_BOTH_DIRECTORY_INFO * pFindData =
862 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
863 filename = &pFindData->FileName[0];
864 len = le32_to_cpu(pFindData->FileNameLength);
865 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
867 cFYI(1,("Unknown findfirst level %d",level));
870 cifsFile->srch_inf.resume_name_len = len;
871 cifsFile->srch_inf.presume_name = filename;
875 int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
879 struct cifs_sb_info *cifs_sb;
880 struct cifsTconInfo *pTcon;
881 struct cifsFileInfo *cifsFile = NULL;
882 char * current_entry;
884 char * tmp_buf = NULL;
889 if(file->f_dentry == NULL) {
894 cifs_sb = CIFS_SB(file->f_dentry->d_sb);
895 pTcon = cifs_sb->tcon;
899 switch ((int) file->f_pos) {
901 /*if (filldir(direntry, ".", 1, file->f_pos,
902 file->f_dentry->d_inode->i_ino, DT_DIR) < 0) {
903 cERROR(1, ("Filldir for current dir failed "));
909 /* if (filldir(direntry, "..", 2, file->f_pos,
910 file->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
911 cERROR(1, ("Filldir for parent dir failed "));
917 /* 1) If search is active,
918 is in current search buffer?
919 if it before then restart search
920 if after then keep searching till find it */
922 if(file->private_data == NULL) {
923 rc = initiate_cifs_search(xid,file);
924 cFYI(1,("initiate cifs search rc %d",rc));
931 if(file->private_data == NULL) {
936 cifsFile = file->private_data;
937 if (cifsFile->srch_inf.endOfSearch) {
938 if(cifsFile->srch_inf.emptyDir) {
939 cFYI(1, ("End of search, empty dir"));
944 cifsFile->invalidHandle = TRUE;
945 CIFSFindClose(xid, pTcon, cifsFile->netfid);
947 kfree(cifsFile->search_resume_name);
948 cifsFile->search_resume_name = NULL; */
950 /* BB account for . and .. in f_pos as special case */
952 rc = find_cifs_entry(xid,pTcon, file,
953 ¤t_entry,&num_to_fill);
955 cFYI(1,("fce error %d",rc));
957 } else if (current_entry != NULL) {
958 cFYI(1,("entry %lld found",file->f_pos));
960 cFYI(1,("could not find entry"));
963 cFYI(1,("loop through %d times filling dir for net buf %p",
964 num_to_fill,cifsFile->srch_inf.ntwrk_buf_start));
965 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
966 smbCalcSize((struct smb_hdr *)
967 cifsFile->srch_inf.ntwrk_buf_start);
968 /* To be safe - for UCS to UTF-8 with strings loaded
969 with the rare long characters alloc more to account for
970 such multibyte target UTF-8 characters. cifs_unicode.c,
971 which actually does the conversion, has the same limit */
972 tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL);
973 for(i=0;(i<num_to_fill) && (rc == 0);i++) {
974 if(current_entry == NULL) {
975 /* evaluate whether this case is an error */
976 cERROR(1,("past end of SMB num to fill %d i %d",
981 rc = cifs_filldir(current_entry, file,
982 filldir, direntry,tmp_buf);
984 if(file->f_pos == cifsFile->srch_inf.index_of_last_entry) {
985 cFYI(1,("last entry in buf at pos %lld %s",
986 file->f_pos,tmp_buf)); /* BB removeme BB */
987 cifs_save_resume_key(current_entry,cifsFile);
990 current_entry = nxt_dir_entry(current_entry,