4 * Copyright (C) International Business Machines Corp., 2002,2003
5 * Author(s): Steve French (sfrench@us.ibm.com)
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <linux/stat.h>
23 #include <linux/namei.h>
27 #include "cifsproto.h"
28 #include "cifs_debug.h"
29 #include "cifs_fs_sb.h"
32 cifs_hardlink(struct dentry
*old_file
, struct inode
*inode
,
33 struct dentry
*direntry
)
37 char *fromName
= NULL
;
39 struct cifs_sb_info
*cifs_sb_target
;
40 struct cifsTconInfo
*pTcon
;
41 struct cifsInodeInfo
*cifsInode
;
45 cifs_sb_target
= CIFS_SB(inode
->i_sb
);
46 pTcon
= cifs_sb_target
->tcon
;
48 /* No need to check for cross device links since server will do that
49 BB note DFS case in future though (when we may have to check) */
51 down(&inode
->i_sb
->s_vfs_rename_sem
);
52 fromName
= build_path_from_dentry(old_file
);
53 toName
= build_path_from_dentry(direntry
);
54 up(&inode
->i_sb
->s_vfs_rename_sem
);
55 if((fromName
== NULL
) || (toName
== NULL
)) {
60 if (cifs_sb_target
->tcon
->ses
->capabilities
& CAP_UNIX
)
61 rc
= CIFSUnixCreateHardLink(xid
, pTcon
, fromName
, toName
,
62 cifs_sb_target
->local_nls
);
64 rc
= CIFSCreateHardLink(xid
, pTcon
, fromName
, toName
,
65 cifs_sb_target
->local_nls
);
72 /* renew_parental_timestamps(old_file);
74 mark_inode_dirty(inode);
75 d_instantiate(direntry, inode); */
76 /* BB add call to either mark inode dirty or refresh its data and timestamp to current time */
78 d_drop(direntry
); /* force new lookup from server */
79 cifsInode
= CIFS_I(old_file
->d_inode
);
80 cifsInode
->time
= 0; /* will force revalidate to go get info when needed */
92 cifs_follow_link(struct dentry
*direntry
, struct nameidata
*nd
)
94 struct inode
*inode
= direntry
->d_inode
;
97 char *full_path
= NULL
;
98 char * target_path
= ERR_PTR(-ENOMEM
);
99 struct cifs_sb_info
*cifs_sb
;
100 struct cifsTconInfo
*pTcon
;
104 down(&direntry
->d_sb
->s_vfs_rename_sem
);
105 full_path
= build_path_from_dentry(direntry
);
106 up(&direntry
->d_sb
->s_vfs_rename_sem
);
111 cFYI(1, ("Full path: %s inode = 0x%p", full_path
, inode
));
112 cifs_sb
= CIFS_SB(inode
->i_sb
);
113 pTcon
= cifs_sb
->tcon
;
114 target_path
= kmalloc(PATH_MAX
, GFP_KERNEL
);
116 target_path
= ERR_PTR(-ENOMEM
);
120 /* BB add read reparse point symlink code and Unix extensions symlink code here BB */
121 if (pTcon
->ses
->capabilities
& CAP_UNIX
)
122 rc
= CIFSSMBUnixQuerySymLink(xid
, pTcon
, full_path
,
127 /* rc = CIFSSMBQueryReparseLinkInfo */
128 /* BB Add code to Query ReparsePoint info */
129 /* BB Add MAC style xsymlink check here if enabled */
134 /* BB Add special case check for Samba DFS symlinks */
136 target_path
[PATH_MAX
-1] = 0;
139 target_path
= ERR_PTR(rc
);
146 nd_set_link(nd
, target_path
);
151 cifs_symlink(struct inode
*inode
, struct dentry
*direntry
, const char *symname
)
153 int rc
= -EOPNOTSUPP
;
155 struct cifs_sb_info
*cifs_sb
;
156 struct cifsTconInfo
*pTcon
;
157 char *full_path
= NULL
;
158 struct inode
*newinode
= NULL
;
162 cifs_sb
= CIFS_SB(inode
->i_sb
);
163 pTcon
= cifs_sb
->tcon
;
165 down(&inode
->i_sb
->s_vfs_rename_sem
);
166 full_path
= build_path_from_dentry(direntry
);
167 up(&inode
->i_sb
->s_vfs_rename_sem
);
169 if(full_path
== NULL
) {
174 cFYI(1, ("Full path: %s ", full_path
));
175 cFYI(1, ("symname is %s", symname
));
177 /* BB what if DFS and this volume is on different share? BB */
178 if (cifs_sb
->tcon
->ses
->capabilities
& CAP_UNIX
)
179 rc
= CIFSUnixCreateSymLink(xid
, pTcon
, full_path
, symname
,
182 rc = CIFSCreateReparseSymLink(xid, pTcon, fromName, toName,cifs_sb_target->local_nls); */
185 if (pTcon
->ses
->capabilities
& CAP_UNIX
)
186 rc
= cifs_get_inode_info_unix(&newinode
, full_path
,
189 rc
= cifs_get_inode_info(&newinode
, full_path
, NULL
,
194 ("Create symlink worked but get_inode_info failed with rc = %d ",
197 direntry
->d_op
= &cifs_dentry_ops
;
198 d_instantiate(direntry
, newinode
);
209 cifs_readlink(struct dentry
*direntry
, char __user
*pBuffer
, int buflen
)
211 struct inode
*inode
= direntry
->d_inode
;
215 struct cifs_sb_info
*cifs_sb
;
216 struct cifsTconInfo
*pTcon
;
217 char *full_path
= NULL
;
218 char *tmp_path
= NULL
;
220 unsigned char * referrals
= NULL
;
221 int num_referrals
= 0;
226 cifs_sb
= CIFS_SB(inode
->i_sb
);
227 pTcon
= cifs_sb
->tcon
;
229 /* BB would it be safe against deadlock to grab this sem
230 even though rename itself grabs the sem and calls lookup? */
231 /* down(&inode->i_sb->s_vfs_rename_sem);*/
232 full_path
= build_path_from_dentry(direntry
);
233 /* up(&inode->i_sb->s_vfs_rename_sem);*/
235 if(full_path
== NULL
) {
241 ("Full path: %s inode = 0x%p pBuffer = 0x%p buflen = %d",
242 full_path
, inode
, pBuffer
, buflen
));
243 if(buflen
> PATH_MAX
)
247 tmpbuffer
= kmalloc(len
,GFP_KERNEL
);
248 if(tmpbuffer
== NULL
) {
255 /* BB add read reparse point symlink code and Unix extensions symlink code here BB */
256 if (cifs_sb
->tcon
->ses
->capabilities
& CAP_UNIX
)
257 rc
= CIFSSMBUnixQuerySymLink(xid
, pTcon
, full_path
,
262 rc
= CIFSSMBOpen(xid
, pTcon
, full_path
, FILE_OPEN
, GENERIC_READ
,
263 OPEN_REPARSE_POINT
,&fid
, &oplock
, NULL
, cifs_sb
->local_nls
);
265 rc
= CIFSSMBQueryReparseLinkInfo(xid
, pTcon
, full_path
,
270 if(CIFSSMBClose(xid
, pTcon
, fid
)) {
271 cFYI(1,("Error closing junction point (open for ioctl)"));
274 /* Query if DFS Junction */
276 kmalloc(MAX_TREE_SIZE
+ MAX_PATHCONF
+ 1,
279 strncpy(tmp_path
, pTcon
->treeName
, MAX_TREE_SIZE
);
280 strncat(tmp_path
, full_path
, MAX_PATHCONF
);
281 rc
= get_dfs_path(xid
, pTcon
->ses
, tmp_path
,
282 cifs_sb
->local_nls
, &num_referrals
, &referrals
);
283 cFYI(1,("Get DFS for %s rc = %d ",tmp_path
, rc
));
284 if((num_referrals
== 0) && (rc
== 0))
287 cFYI(1,("num referral: %d",num_referrals
));
289 cFYI(1,("referral string: %s ",referrals
));
290 strncpy(tmpbuffer
, referrals
, len
-1);
297 /* BB add code like else decode referrals then memcpy to
298 tmpbuffer and free referrals string array BB */
302 /* BB Anything else to do to handle recursive links? */
303 /* BB Should we be using page ops here? */
305 /* BB null terminate returned string in pBuffer? BB */
307 rc
= vfs_readlink(direntry
, pBuffer
, len
, tmpbuffer
);
309 ("vfs_readlink called from cifs_readlink returned %d",
323 void cifs_put_link(struct dentry
*direntry
, struct nameidata
*nd
)
325 char *p
= nd_get_link(nd
);