[linux.git] / fs / cifs / link.c

/*
 *   fs/cifs/link.c
 *
 *   Copyright (C) International Business Machines  Corp., 2002,2003
 *   Author(s): Steve French ([email protected])
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published
 *   by the Free Software Foundation; either version 2.1 of the License, or
 *   (at your option) any later version.
 *
 *   This library is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
#include <linux/fs.h>
#include <linux/stat.h>
#include <linux/namei.h>
#include "cifsfs.h"
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
#include "cifs_debug.h"
#include "cifs_fs_sb.h"

int
cifs_hardlink(struct dentry *old_file, struct inode *inode,
	      struct dentry *direntry)
{
	int rc = -EACCES;
	int xid;
	char *fromName = NULL;
	char *toName = NULL;
	struct cifs_sb_info *cifs_sb_target;
	struct cifsTconInfo *pTcon;
	struct cifsInodeInfo *cifsInode;

	xid = GetXid();

	cifs_sb_target = CIFS_SB(inode->i_sb);
	pTcon = cifs_sb_target->tcon;

/* No need to check for cross device links since server will do that
   BB note DFS case in future though (when we may have to check) */

	fromName = build_path_from_dentry(old_file);
	toName = build_path_from_dentry(direntry);
	if((fromName == NULL) || (toName == NULL)) {
		rc = -ENOMEM;
		goto cifs_hl_exit;
	}

	if (cifs_sb_target->tcon->ses->capabilities & CAP_UNIX)
		rc = CIFSUnixCreateHardLink(xid, pTcon, fromName, toName,
					    cifs_sb_target->local_nls, 
					    cifs_sb_target->mnt_cifs_flags &
						CIFS_MOUNT_MAP_SPECIAL_CHR);
	else {
		rc = CIFSCreateHardLink(xid, pTcon, fromName, toName,
					cifs_sb_target->local_nls, 
					cifs_sb_target->mnt_cifs_flags &
						CIFS_MOUNT_MAP_SPECIAL_CHR);
		if((rc == -EIO) || (rc == -EINVAL))
			rc = -EOPNOTSUPP;  
	}

	d_drop(direntry);	/* force new lookup from server of target */

	/* if source file is cached (oplocked) revalidate will not go to server
	   until the file is closed or oplock broken so update nlinks locally */
	if(old_file->d_inode) {
		cifsInode = CIFS_I(old_file->d_inode);
		if(rc == 0) {
			old_file->d_inode->i_nlink++;
/* BB should we make this contingent on superblock flag NOATIME? */
/*			old_file->d_inode->i_ctime = CURRENT_TIME;*/
			/* parent dir timestamps will update from srv
			within a second, would it really be worth it
			to set the parent dir cifs inode time to zero
			to force revalidate (faster) for it too? */
		}
		/* if not oplocked will force revalidate to get info 
		   on source file from srv */
		cifsInode->time = 0;

                /* Will update parent dir timestamps from srv within a second.
		   Would it really be worth it to set the parent dir (cifs
		   inode) time field to zero to force revalidate on parent
		   directory faster ie 
			CIFS_I(inode)->time = 0;  */
	}

cifs_hl_exit:
	kfree(fromName);
	kfree(toName);
	FreeXid(xid);
	return rc;
}

void *
cifs_follow_link(struct dentry *direntry, struct nameidata *nd)
{
	struct inode *inode = direntry->d_inode;
	int rc = -EACCES;
	int xid;
	char *full_path = NULL;
	char * target_path = ERR_PTR(-ENOMEM);
	struct cifs_sb_info *cifs_sb;
	struct cifsTconInfo *pTcon;

	xid = GetXid();

	full_path = build_path_from_dentry(direntry);

	if (!full_path)
		goto out_no_free;

	cFYI(1, ("Full path: %s inode = 0x%p", full_path, inode));
	cifs_sb = CIFS_SB(inode->i_sb);
	pTcon = cifs_sb->tcon;
	target_path = kmalloc(PATH_MAX, GFP_KERNEL);
	if (!target_path) {
		target_path = ERR_PTR(-ENOMEM);
		goto out;
	}

/* BB add read reparse point symlink code and Unix extensions symlink code here BB */
	if (pTcon->ses->capabilities & CAP_UNIX)
		rc = CIFSSMBUnixQuerySymLink(xid, pTcon, full_path,
					     target_path,
					     PATH_MAX-1,
					     cifs_sb->local_nls);
	else {
		/* rc = CIFSSMBQueryReparseLinkInfo */
		/* BB Add code to Query ReparsePoint info */
		/* BB Add MAC style xsymlink check here if enabled */
	}

	if (rc == 0) {

/* BB Add special case check for Samba DFS symlinks */

		target_path[PATH_MAX-1] = 0;
	} else {
		kfree(target_path);
		target_path = ERR_PTR(rc);
	}

out:
	kfree(full_path);
out_no_free:
	FreeXid(xid);
	nd_set_link(nd, target_path);
	return NULL;	/* No cookie */
}

int
cifs_symlink(struct inode *inode, struct dentry *direntry, const char *symname)
{
	int rc = -EOPNOTSUPP;
	int xid;
	struct cifs_sb_info *cifs_sb;
	struct cifsTconInfo *pTcon;
	char *full_path = NULL;
	struct inode *newinode = NULL;

	xid = GetXid();

	cifs_sb = CIFS_SB(inode->i_sb);
	pTcon = cifs_sb->tcon;

	full_path = build_path_from_dentry(direntry);

	if(full_path == NULL) {
		FreeXid(xid);
		return -ENOMEM;
	}

	cFYI(1, ("Full path: %s", full_path));
	cFYI(1, ("symname is %s", symname));

	/* BB what if DFS and this volume is on different share? BB */
	if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
		rc = CIFSUnixCreateSymLink(xid, pTcon, full_path, symname,
					   cifs_sb->local_nls);
	/* else
	   rc = CIFSCreateReparseSymLink(xid, pTcon, fromName, toName,cifs_sb_target->local_nls); */

	if (rc == 0) {
		if (pTcon->ses->capabilities & CAP_UNIX)
			rc = cifs_get_inode_info_unix(&newinode, full_path,
						      inode->i_sb,xid);
		else
			rc = cifs_get_inode_info(&newinode, full_path, NULL,
						 inode->i_sb,xid);

		if (rc != 0) {
			cFYI(1, ("Create symlink ok, getinodeinfo fail rc = %d",
			      rc));
		} else {
			if (pTcon->nocase)
				direntry->d_op = &cifs_ci_dentry_ops;
			else
				direntry->d_op = &cifs_dentry_ops;
			d_instantiate(direntry, newinode);
		}
	}

	kfree(full_path);
	FreeXid(xid);
	return rc;
}

int
cifs_readlink(struct dentry *direntry, char __user *pBuffer, int buflen)
{
	struct inode *inode = direntry->d_inode;
	int rc = -EACCES;
	int xid;
	int oplock = FALSE;
	struct cifs_sb_info *cifs_sb;
	struct cifsTconInfo *pTcon;
	char *full_path = NULL;
	char *tmp_path =  NULL;
	char * tmpbuffer;
	unsigned char * referrals = NULL;
	int num_referrals = 0;
	int len;
	__u16 fid;

	xid = GetXid();
	cifs_sb = CIFS_SB(inode->i_sb);
	pTcon = cifs_sb->tcon;

/* BB would it be safe against deadlock to grab this sem 
      even though rename itself grabs the sem and calls lookup? */
/*       mutex_lock(&inode->i_sb->s_vfs_rename_mutex);*/
	full_path = build_path_from_dentry(direntry);
/*       mutex_unlock(&inode->i_sb->s_vfs_rename_mutex);*/

	if(full_path == NULL) {
		FreeXid(xid);
		return -ENOMEM;
	}

	cFYI(1,
	     ("Full path: %s inode = 0x%p pBuffer = 0x%p buflen = %d",
	      full_path, inode, pBuffer, buflen));
	if(buflen > PATH_MAX)
		len = PATH_MAX;
	else
		len = buflen;
	tmpbuffer = kmalloc(len,GFP_KERNEL);   
	if(tmpbuffer == NULL) {
		kfree(full_path);
		FreeXid(xid);
		return -ENOMEM;
	}

/* BB add read reparse point symlink code and Unix extensions symlink code here BB */
	if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
		rc = CIFSSMBUnixQuerySymLink(xid, pTcon, full_path,
				tmpbuffer,
				len - 1,
				cifs_sb->local_nls);
	else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
		cERROR(1,("SFU style symlinks not implemented yet"));
		/* add open and read as in fs/cifs/inode.c */
	
	} else {
		rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, GENERIC_READ,
				OPEN_REPARSE_POINT,&fid, &oplock, NULL, 
				cifs_sb->local_nls, 
				cifs_sb->mnt_cifs_flags & 
					CIFS_MOUNT_MAP_SPECIAL_CHR);
		if(!rc) {
			rc = CIFSSMBQueryReparseLinkInfo(xid, pTcon, full_path,
				tmpbuffer,
				len - 1, 
				fid,
				cifs_sb->local_nls);
			if(CIFSSMBClose(xid, pTcon, fid)) {
				cFYI(1,("Error closing junction point (open for ioctl)"));
			}
			if(rc == -EIO) {
				/* Query if DFS Junction */
				tmp_path =
					kmalloc(MAX_TREE_SIZE + MAX_PATHCONF + 1,
						GFP_KERNEL);
				if (tmp_path) {
					strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
					strncat(tmp_path, full_path, MAX_PATHCONF);
					rc = get_dfs_path(xid, pTcon->ses, tmp_path,
						cifs_sb->local_nls,
						&num_referrals, &referrals,
						cifs_sb->mnt_cifs_flags &
						    CIFS_MOUNT_MAP_SPECIAL_CHR);
					cFYI(1,("Get DFS for %s rc = %d ",tmp_path, rc));
					if((num_referrals == 0) && (rc == 0))
						rc = -EACCES;
					else {
						cFYI(1,("num referral: %d",num_referrals));
						if(referrals) {
							cFYI(1,("referral string: %s",referrals));
							strncpy(tmpbuffer, referrals, len-1);                            
						}
					}
					kfree(referrals);
					kfree(tmp_path);
}
				/* BB add code like else decode referrals then memcpy to
				  tmpbuffer and free referrals string array BB */
			}
		}
	}
	/* BB Anything else to do to handle recursive links? */
	/* BB Should we be using page ops here? */

	/* BB null terminate returned string in pBuffer? BB */
	if (rc == 0) {
		rc = vfs_readlink(direntry, pBuffer, len, tmpbuffer);
		cFYI(1,
		     ("vfs_readlink called from cifs_readlink returned %d",
		      rc));
	}

	kfree(tmpbuffer);
	kfree(full_path);
	FreeXid(xid);
	return rc;
}

void cifs_put_link(struct dentry *direntry, struct nameidata *nd, void *cookie)
{
	char *p = nd_get_link(nd);
	if (!IS_ERR(p))
		kfree(p);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* fs/cifs/link.c
	3	*
	4	* Copyright (C) International Business Machines Corp., 2002,2003
	5	* Author(s): Steve French ([email protected])
	6	*
	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.
	11	*
	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.
	16	*
	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
	20	*/
	21	#include <linux/fs.h>
	22	#include <linux/stat.h>
	23	#include <linux/namei.h>
	24	#include "cifsfs.h"
	25	#include "cifspdu.h"
	26	#include "cifsglob.h"
	27	#include "cifsproto.h"
	28	#include "cifs_debug.h"
	29	#include "cifs_fs_sb.h"
	30
	31	int
	32	cifs_hardlink(struct dentry old_file, struct inode inode,
	33	struct dentry *direntry)
	34	{
	35	int rc = -EACCES;
	36	int xid;
	37	char *fromName = NULL;
	38	char *toName = NULL;
	39	struct cifs_sb_info *cifs_sb_target;
	40	struct cifsTconInfo *pTcon;
	41	struct cifsInodeInfo *cifsInode;
	42
	43	xid = GetXid();
	44
	45	cifs_sb_target = CIFS_SB(inode->i_sb);
	46	pTcon = cifs_sb_target->tcon;
	47
	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) */
	50
7f57356b SF	51	fromName = build_path_from_dentry(old_file);
7f57356b SF	52	toName = build_path_from_dentry(direntry);
1da177e4 LT	53	if((fromName == NULL) \|\| (toName == NULL)) {
	54	rc = -ENOMEM;
	55	goto cifs_hl_exit;
	56	}
	57
	58	if (cifs_sb_target->tcon->ses->capabilities & CAP_UNIX)
	59	rc = CIFSUnixCreateHardLink(xid, pTcon, fromName, toName,
737b758c SF	60	cifs_sb_target->local_nls,
	61	cifs_sb_target->mnt_cifs_flags &
	62	CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 LT	63	else {
1da177e4 LT	64	rc = CIFSCreateHardLink(xid, pTcon, fromName, toName,
737b758c SF	65	cifs_sb_target->local_nls,
	66	cifs_sb_target->mnt_cifs_flags &
	67	CIFS_MOUNT_MAP_SPECIAL_CHR);
083d3a2c	68	if((rc == -EIO) \|\| (rc == -EINVAL))
1da177e4 LT	69	rc = -EOPNOTSUPP;
	70	}
	71
31ec35d6 SF	72	d_drop(direntry); /* force new lookup from server of target */
	73
	74	/* if source file is cached (oplocked) revalidate will not go to server
	75	until the file is closed or oplock broken so update nlinks locally */
	76	if(old_file->d_inode) {
	77	cifsInode = CIFS_I(old_file->d_inode);
	78	if(rc == 0) {
	79	old_file->d_inode->i_nlink++;
1b2b2126 SF	80	/* BB should we make this contingent on superblock flag NOATIME? */
1b2b2126 SF	81	/* old_file->d_inode->i_ctime = CURRENT_TIME;*/
31ec35d6 SF	82	/* parent dir timestamps will update from srv
	83	within a second, would it really be worth it
	84	to set the parent dir cifs inode time to zero
	85	to force revalidate (faster) for it too? */
	86	}
	87	/* if not oplocked will force revalidate to get info
	88	on source file from srv */
	89	cifsInode->time = 0;
	90
	91	/* Will update parent dir timestamps from srv within a second.
	92	Would it really be worth it to set the parent dir (cifs
	93	inode) time field to zero to force revalidate on parent
	94	directory faster ie
	95	CIFS_I(inode)->time = 0; */
1da177e4	96	}
1da177e4 LT	97
1da177e4 LT	98	cifs_hl_exit:
f99d49ad JJ	99	kfree(fromName);
f99d49ad JJ	100	kfree(toName);
1da177e4 LT	101	FreeXid(xid);
	102	return rc;
	103	}
	104
cc314eef	105	void *
1da177e4 LT	106	cifs_follow_link(struct dentry direntry, struct nameidata nd)
	107	{
	108	struct inode *inode = direntry->d_inode;
	109	int rc = -EACCES;
	110	int xid;
	111	char *full_path = NULL;
	112	char * target_path = ERR_PTR(-ENOMEM);
	113	struct cifs_sb_info *cifs_sb;
	114	struct cifsTconInfo *pTcon;
	115
	116	xid = GetXid();
	117
7f57356b	118	full_path = build_path_from_dentry(direntry);
1da177e4 LT	119
	120	if (!full_path)
	121	goto out_no_free;
	122
	123	cFYI(1, ("Full path: %s inode = 0x%p", full_path, inode));
7f57356b SF	124	cifs_sb = CIFS_SB(inode->i_sb);
7f57356b SF	125	pTcon = cifs_sb->tcon;
1da177e4 LT	126	target_path = kmalloc(PATH_MAX, GFP_KERNEL);
	127	if (!target_path) {
	128	target_path = ERR_PTR(-ENOMEM);
	129	goto out;
	130	}
	131
	132	/* BB add read reparse point symlink code and Unix extensions symlink code here BB */
	133	if (pTcon->ses->capabilities & CAP_UNIX)
	134	rc = CIFSSMBUnixQuerySymLink(xid, pTcon, full_path,
	135	target_path,
	136	PATH_MAX-1,
	137	cifs_sb->local_nls);
	138	else {
	139	/* rc = CIFSSMBQueryReparseLinkInfo */
	140	/* BB Add code to Query ReparsePoint info */
	141	/* BB Add MAC style xsymlink check here if enabled */
	142	}
	143
	144	if (rc == 0) {
	145
	146	/* BB Add special case check for Samba DFS symlinks */
	147
	148	target_path[PATH_MAX-1] = 0;
	149	} else {
	150	kfree(target_path);
	151	target_path = ERR_PTR(rc);
	152	}
	153
	154	out:
	155	kfree(full_path);
	156	out_no_free:
	157	FreeXid(xid);
	158	nd_set_link(nd, target_path);
cc314eef	159	return NULL; /* No cookie */
1da177e4 LT	160	}
	161
	162	int
	163	cifs_symlink(struct inode inode, struct dentry direntry, const char *symname)
	164	{
	165	int rc = -EOPNOTSUPP;
	166	int xid;
	167	struct cifs_sb_info *cifs_sb;
	168	struct cifsTconInfo *pTcon;
	169	char *full_path = NULL;
	170	struct inode *newinode = NULL;
	171
	172	xid = GetXid();
	173
	174	cifs_sb = CIFS_SB(inode->i_sb);
	175	pTcon = cifs_sb->tcon;
	176
7f57356b	177	full_path = build_path_from_dentry(direntry);
1da177e4 LT	178
	179	if(full_path == NULL) {
	180	FreeXid(xid);
	181	return -ENOMEM;
	182	}
	183
26a21b98	184	cFYI(1, ("Full path: %s", full_path));
1da177e4 LT	185	cFYI(1, ("symname is %s", symname));
	186
	187	/* BB what if DFS and this volume is on different share? BB */
	188	if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
	189	rc = CIFSUnixCreateSymLink(xid, pTcon, full_path, symname,
	190	cifs_sb->local_nls);
	191	/* else
	192	rc = CIFSCreateReparseSymLink(xid, pTcon, fromName, toName,cifs_sb_target->local_nls); */
	193
	194	if (rc == 0) {
	195	if (pTcon->ses->capabilities & CAP_UNIX)
	196	rc = cifs_get_inode_info_unix(&newinode, full_path,
	197	inode->i_sb,xid);
	198	else
	199	rc = cifs_get_inode_info(&newinode, full_path, NULL,
	200	inode->i_sb,xid);
	201
	202	if (rc != 0) {
26a21b98	203	cFYI(1, ("Create symlink ok, getinodeinfo fail rc = %d",
1da177e4 LT	204	rc));
1da177e4 LT	205	} else {
b92327fe SF	206	if (pTcon->nocase)
	207	direntry->d_op = &cifs_ci_dentry_ops;
	208	else
	209	direntry->d_op = &cifs_dentry_ops;
1da177e4 LT	210	d_instantiate(direntry, newinode);
	211	}
	212	}
	213
f99d49ad	214	kfree(full_path);
1da177e4 LT	215	FreeXid(xid);
	216	return rc;
	217	}
	218
	219	int
	220	cifs_readlink(struct dentry direntry, char __user pBuffer, int buflen)
	221	{
	222	struct inode *inode = direntry->d_inode;
	223	int rc = -EACCES;
	224	int xid;
	225	int oplock = FALSE;
	226	struct cifs_sb_info *cifs_sb;
	227	struct cifsTconInfo *pTcon;
	228	char *full_path = NULL;
	229	char *tmp_path = NULL;
	230	char * tmpbuffer;
	231	unsigned char * referrals = NULL;
	232	int num_referrals = 0;
	233	int len;
	234	__u16 fid;
	235
	236	xid = GetXid();
	237	cifs_sb = CIFS_SB(inode->i_sb);
	238	pTcon = cifs_sb->tcon;
	239
	240	/* BB would it be safe against deadlock to grab this sem
	241	even though rename itself grabs the sem and calls lookup? */
a11f3a05	242	/* mutex_lock(&inode->i_sb->s_vfs_rename_mutex);*/
7f57356b	243	full_path = build_path_from_dentry(direntry);
a11f3a05	244	/* mutex_unlock(&inode->i_sb->s_vfs_rename_mutex);*/
1da177e4 LT	245
	246	if(full_path == NULL) {
	247	FreeXid(xid);
	248	return -ENOMEM;
	249	}
	250
	251	cFYI(1,
	252	("Full path: %s inode = 0x%p pBuffer = 0x%p buflen = %d",
	253	full_path, inode, pBuffer, buflen));
	254	if(buflen > PATH_MAX)
	255	len = PATH_MAX;
	256	else
	257	len = buflen;
	258	tmpbuffer = kmalloc(len,GFP_KERNEL);
	259	if(tmpbuffer == NULL) {
f99d49ad	260	kfree(full_path);
1da177e4 LT	261	FreeXid(xid);
	262	return -ENOMEM;
	263	}
	264
	265	/* BB add read reparse point symlink code and Unix extensions symlink code here BB */
	266	if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
	267	rc = CIFSSMBUnixQuerySymLink(xid, pTcon, full_path,
	268	tmpbuffer,
	269	len - 1,
	270	cifs_sb->local_nls);
1bd5bbcb SF	271	else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
	272	cERROR(1,("SFU style symlinks not implemented yet"));
	273	/* add open and read as in fs/cifs/inode.c */
	274
	275	} else {
1da177e4	276	rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, GENERIC_READ,
737b758c SF	277	OPEN_REPARSE_POINT,&fid, &oplock, NULL,
	278	cifs_sb->local_nls,
	279	cifs_sb->mnt_cifs_flags &
	280	CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 LT	281	if(!rc) {
	282	rc = CIFSSMBQueryReparseLinkInfo(xid, pTcon, full_path,
	283	tmpbuffer,
	284	len - 1,
	285	fid,
	286	cifs_sb->local_nls);
	287	if(CIFSSMBClose(xid, pTcon, fid)) {
	288	cFYI(1,("Error closing junction point (open for ioctl)"));
	289	}
	290	if(rc == -EIO) {
	291	/* Query if DFS Junction */
	292	tmp_path =
	293	kmalloc(MAX_TREE_SIZE + MAX_PATHCONF + 1,
	294	GFP_KERNEL);
	295	if (tmp_path) {
	296	strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
	297	strncat(tmp_path, full_path, MAX_PATHCONF);
	298	rc = get_dfs_path(xid, pTcon->ses, tmp_path,
737b758c SF	299	cifs_sb->local_nls,
	300	&num_referrals, &referrals,
	301	cifs_sb->mnt_cifs_flags &
	302	CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 LT	303	cFYI(1,("Get DFS for %s rc = %d ",tmp_path, rc));
	304	if((num_referrals == 0) && (rc == 0))
	305	rc = -EACCES;
	306	else {
	307	cFYI(1,("num referral: %d",num_referrals));
	308	if(referrals) {
26a21b98	309	cFYI(1,("referral string: %s",referrals));
1da177e4 LT	310	strncpy(tmpbuffer, referrals, len-1);
	311	}
	312	}
f99d49ad	313	kfree(referrals);
1da177e4 LT	314	kfree(tmp_path);
	315	}
	316	/* BB add code like else decode referrals then memcpy to
	317	tmpbuffer and free referrals string array BB */
	318	}
	319	}
	320	}
	321	/* BB Anything else to do to handle recursive links? */
	322	/* BB Should we be using page ops here? */
	323
	324	/* BB null terminate returned string in pBuffer? BB */
	325	if (rc == 0) {
	326	rc = vfs_readlink(direntry, pBuffer, len, tmpbuffer);
	327	cFYI(1,
	328	("vfs_readlink called from cifs_readlink returned %d",
	329	rc));
	330	}
	331
f99d49ad JJ	332	kfree(tmpbuffer);
f99d49ad JJ	333	kfree(full_path);
1da177e4 LT	334	FreeXid(xid);
	335	return rc;
	336	}
	337
cc314eef	338	void cifs_put_link(struct dentry direntry, struct nameidata nd, void *cookie)
1da177e4 LT	339	{
	340	char *p = nd_get_link(nd);
	341	if (!IS_ERR(p))
	342	kfree(p);
	343	}