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>
26 #include "cifsproto.h"
27 #include "cifs_debug.h"
28 #include "cifs_fs_sb.h"
31 cifs_hardlink(struct dentry *old_file, struct inode *inode,
32 struct dentry *direntry)
36 char *fromName = NULL;
38 struct cifs_sb_info *cifs_sb_target;
39 struct cifsTconInfo *pTcon;
40 struct cifsInodeInfo *cifsInode;
44 cifs_sb_target = CIFS_SB(inode->i_sb);
45 pTcon = cifs_sb_target->tcon;
47 /* No need to check for cross device links since server will do that
48 BB note DFS case in future though (when we may have to check) */
50 down(&inode->i_sb->s_vfs_rename_sem);
51 fromName = build_path_from_dentry(old_file);
52 toName = build_path_from_dentry(direntry);
53 up(&inode->i_sb->s_vfs_rename_sem);
54 if((fromName == NULL) || (toName == NULL)) {
59 if (cifs_sb_target->tcon->ses->capabilities & CAP_UNIX)
60 rc = CIFSUnixCreateHardLink(xid, pTcon, fromName, toName,
61 cifs_sb_target->local_nls);
63 rc = CIFSCreateHardLink(xid, pTcon, fromName, toName,
64 cifs_sb_target->local_nls);
71 /* renew_parental_timestamps(old_file);
73 mark_inode_dirty(inode);
74 d_instantiate(direntry, inode); */
75 /* BB add call to either mark inode dirty or refresh its data and timestamp to current time */
77 d_drop(direntry); /* force new lookup from server */
78 cifsInode = CIFS_I(old_file->d_inode);
79 cifsInode->time = 0; /* will force revalidate to go get info when needed */
91 cifs_follow_link(struct dentry *direntry, struct nameidata *nd)
93 struct inode *inode = direntry->d_inode;
96 char *full_path = NULL;
98 struct cifs_sb_info *cifs_sb;
99 struct cifsTconInfo *pTcon;
103 down(&direntry->d_sb->s_vfs_rename_sem);
104 full_path = build_path_from_dentry(direntry);
105 up(&direntry->d_sb->s_vfs_rename_sem);
107 if(full_path == NULL) {
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);
115 if(target_path == NULL) {
121 /* can not call the following line due to EFAULT in vfs_readlink which is presumably expecting a user space buffer */
122 /* length = cifs_readlink(direntry,target_path, sizeof(target_path) - 1); */
124 /* BB add read reparse point symlink code and Unix extensions symlink code here BB */
125 if (pTcon->ses->capabilities & CAP_UNIX)
126 rc = CIFSSMBUnixQuerySymLink(xid, pTcon, full_path,
131 /* rc = CIFSSMBQueryReparseLinkInfo */
132 /* BB Add code to Query ReparsePoint info */
134 /* BB Anything else to do to handle recursive links? */
135 /* BB Should we be using page symlink ops here? */
139 /* BB Add special case check for Samba DFS symlinks */
141 target_path[PATH_MAX-1] = 0;
142 rc = vfs_follow_link(nd, target_path);
155 cifs_symlink(struct inode *inode, struct dentry *direntry, const char *symname)
157 int rc = -EOPNOTSUPP;
159 struct cifs_sb_info *cifs_sb;
160 struct cifsTconInfo *pTcon;
161 char *full_path = NULL;
162 struct inode *newinode = NULL;
166 cifs_sb = CIFS_SB(inode->i_sb);
167 pTcon = cifs_sb->tcon;
169 down(&inode->i_sb->s_vfs_rename_sem);
170 full_path = build_path_from_dentry(direntry);
171 up(&inode->i_sb->s_vfs_rename_sem);
173 if(full_path == NULL) {
178 cFYI(1, ("Full path: %s ", full_path));
179 cFYI(1, ("symname is %s", symname));
181 /* BB what if DFS and this volume is on different share? BB */
182 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
183 rc = CIFSUnixCreateSymLink(xid, pTcon, full_path, symname,
186 rc = CIFSCreateReparseSymLink(xid, pTcon, fromName, toName,cifs_sb_target->local_nls); */
189 if (pTcon->ses->capabilities & CAP_UNIX)
190 rc = cifs_get_inode_info_unix(&newinode, full_path,
193 rc = cifs_get_inode_info(&newinode, full_path, NULL,
198 ("Create symlink worked but get_inode_info failed with rc = %d ",
201 direntry->d_op = &cifs_dentry_ops;
202 d_instantiate(direntry, newinode);
213 cifs_readlink(struct dentry *direntry, char __user *pBuffer, int buflen)
215 struct inode *inode = direntry->d_inode;
219 struct cifs_sb_info *cifs_sb;
220 struct cifsTconInfo *pTcon;
221 char *full_path = NULL;
222 char *tmp_path = NULL;
224 unsigned char * referrals = NULL;
225 int num_referrals = 0;
230 cifs_sb = CIFS_SB(inode->i_sb);
231 pTcon = cifs_sb->tcon;
233 /* BB would it be safe against deadlock to grab this sem
234 even though rename itself grabs the sem and calls lookup? */
235 /* down(&inode->i_sb->s_vfs_rename_sem);*/
236 full_path = build_path_from_dentry(direntry);
237 /* up(&inode->i_sb->s_vfs_rename_sem);*/
239 if(full_path == NULL) {
245 ("Full path: %s inode = 0x%p pBuffer = 0x%p buflen = %d",
246 full_path, inode, pBuffer, buflen));
247 if(buflen > PATH_MAX)
251 tmpbuffer = kmalloc(len,GFP_KERNEL);
252 if(tmpbuffer == NULL) {
259 /* BB add read reparse point symlink code and Unix extensions symlink code here BB */
260 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
261 rc = CIFSSMBUnixQuerySymLink(xid, pTcon, full_path,
266 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, GENERIC_READ,
267 OPEN_REPARSE_POINT,&fid, &oplock, NULL, cifs_sb->local_nls);
269 rc = CIFSSMBQueryReparseLinkInfo(xid, pTcon, full_path,
274 if(CIFSSMBClose(xid, pTcon, fid)) {
275 cFYI(1,("Error closing junction point (open for ioctl)"));
278 /* Query if DFS Junction */
280 kmalloc(MAX_TREE_SIZE + MAX_PATHCONF + 1,
283 strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
284 strncat(tmp_path, full_path, MAX_PATHCONF);
285 rc = get_dfs_path(xid, pTcon->ses, tmp_path,
286 cifs_sb->local_nls, &num_referrals, &referrals);
287 cFYI(1,("Get DFS for %s rc = %d ",tmp_path, rc));
288 if((num_referrals == 0) && (rc == 0))
291 cFYI(1,("num referral: %d",num_referrals));
293 cFYI(1,("referral string: %s ",referrals));
294 strncpy(tmpbuffer, referrals, len-1);
304 /* BB add code like else decode referrals then memcpy to
305 tmpbuffer and free referrals string array BB */
309 /* BB Anything else to do to handle recursive links? */
310 /* BB Should we be using page ops here? */
312 /* BB null terminate returned string in pBuffer? BB */
314 rc = vfs_readlink(direntry, pBuffer, len, tmpbuffer);
316 ("vfs_readlink called from cifs_readlink returned %d",