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

/*
 *   fs/cifs/link.c
 *
 *   Copyright (C) International Business Machines  Corp., 2002,2008
 *   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)*/
	if (pTcon->unix_ext)
		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;
	}

	/* We could change this to:
		if (pTcon->unix_ext)
	   but there does not seem any point in refusing to
	   get symlink info if we can, even if unix extensions
	   turned off for this mount */

	if (pTcon->ses->capabilities & CAP_UNIX)
		rc = CIFSSMBUnixQuerySymLink(xid, pTcon, full_path,
					     target_path,
					     PATH_MAX-1,
					     cifs_sb->local_nls);
	else {
		/* BB add read reparse point symlink code here */
		/* 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 (pTcon->unix_ext)
		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->unix_ext)
			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, NULL);

		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 = 0;
	struct cifs_sb_info *cifs_sb;
	struct cifsTconInfo *pTcon;
	char *full_path = NULL;
	char *tmpbuffer;
	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 */
/* We could disable this based on pTcon->unix_ext flag instead ... but why? */
	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 it is a DFS junction earlier we would have gotten
			   PATH_NOT_COVERED returned from server so we do
			   not need to request the DFS info here */
		}
	}
	/* 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	*
366781c1	4	* Copyright (C) International Business Machines Corp., 2002,2008
1da177e4 LT	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);
fb8c4b14	53	if ((fromName == NULL) \|\| (toName == NULL)) {
1da177e4 LT	54	rc = -ENOMEM;
	55	goto cifs_hl_exit;
	56	}
	57
c18c842b SF	58	/* if (cifs_sb_target->tcon->ses->capabilities & CAP_UNIX)*/
c18c842b SF	59	if (pTcon->unix_ext)
1da177e4	60	rc = CIFSUnixCreateHardLink(xid, pTcon, fromName, toName,
fb8c4b14	61	cifs_sb_target->local_nls,
737b758c SF	62	cifs_sb_target->mnt_cifs_flags &
737b758c SF	63	CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 LT	64	else {
1da177e4 LT	65	rc = CIFSCreateHardLink(xid, pTcon, fromName, toName,
fb8c4b14	66	cifs_sb_target->local_nls,
737b758c SF	67	cifs_sb_target->mnt_cifs_flags &
737b758c SF	68	CIFS_MOUNT_MAP_SPECIAL_CHR);
fb8c4b14 SF	69	if ((rc == -EIO) \|\| (rc == -EINVAL))
fb8c4b14 SF	70	rc = -EOPNOTSUPP;
1da177e4 LT	71	}
1da177e4 LT	72
31ec35d6 SF	73	d_drop(direntry); /* force new lookup from server of target */
	74
	75	/* if source file is cached (oplocked) revalidate will not go to server
	76	until the file is closed or oplock broken so update nlinks locally */
fb8c4b14	77	if (old_file->d_inode) {
31ec35d6	78	cifsInode = CIFS_I(old_file->d_inode);
fb8c4b14	79	if (rc == 0) {
31ec35d6	80	old_file->d_inode->i_nlink++;
1b2b2126 SF	81	/* BB should we make this contingent on superblock flag NOATIME? */
1b2b2126 SF	82	/* old_file->d_inode->i_ctime = CURRENT_TIME;*/
31ec35d6 SF	83	/* parent dir timestamps will update from srv
	84	within a second, would it really be worth it
	85	to set the parent dir cifs inode time to zero
	86	to force revalidate (faster) for it too? */
	87	}
fb8c4b14	88	/* if not oplocked will force revalidate to get info
31ec35d6 SF	89	on source file from srv */
	90	cifsInode->time = 0;
	91
fb8c4b14	92	/* Will update parent dir timestamps from srv within a second.
31ec35d6 SF	93	Would it really be worth it to set the parent dir (cifs
31ec35d6 SF	94	inode) time field to zero to force revalidate on parent
fb8c4b14	95	directory faster ie
31ec35d6	96	CIFS_I(inode)->time = 0; */
1da177e4	97	}
1da177e4 LT	98
1da177e4 LT	99	cifs_hl_exit:
f99d49ad JJ	100	kfree(fromName);
f99d49ad JJ	101	kfree(toName);
1da177e4 LT	102	FreeXid(xid);
	103	return rc;
	104	}
	105
cc314eef	106	void *
1da177e4 LT	107	cifs_follow_link(struct dentry direntry, struct nameidata nd)
	108	{
	109	struct inode *inode = direntry->d_inode;
	110	int rc = -EACCES;
	111	int xid;
	112	char *full_path = NULL;
fb8c4b14	113	char *target_path = ERR_PTR(-ENOMEM);
1da177e4 LT	114	struct cifs_sb_info *cifs_sb;
	115	struct cifsTconInfo *pTcon;
	116
	117	xid = GetXid();
	118
7f57356b	119	full_path = build_path_from_dentry(direntry);
1da177e4 LT	120
	121	if (!full_path)
	122	goto out_no_free;
	123
	124	cFYI(1, ("Full path: %s inode = 0x%p", full_path, inode));
7f57356b SF	125	cifs_sb = CIFS_SB(inode->i_sb);
7f57356b SF	126	pTcon = cifs_sb->tcon;
1da177e4 LT	127	target_path = kmalloc(PATH_MAX, GFP_KERNEL);
	128	if (!target_path) {
	129	target_path = ERR_PTR(-ENOMEM);
	130	goto out;
	131	}
	132
c18c842b SF	133	/* We could change this to:
	134	if (pTcon->unix_ext)
	135	but there does not seem any point in refusing to
	136	get symlink info if we can, even if unix extensions
	137	turned off for this mount */
	138
1da177e4 LT	139	if (pTcon->ses->capabilities & CAP_UNIX)
	140	rc = CIFSSMBUnixQuerySymLink(xid, pTcon, full_path,
	141	target_path,
	142	PATH_MAX-1,
	143	cifs_sb->local_nls);
	144	else {
c18c842b	145	/* BB add read reparse point symlink code here */
1da177e4 LT	146	/* rc = CIFSSMBQueryReparseLinkInfo */
	147	/* BB Add code to Query ReparsePoint info */
	148	/* BB Add MAC style xsymlink check here if enabled */
	149	}
	150
	151	if (rc == 0) {
	152
	153	/* BB Add special case check for Samba DFS symlinks */
	154
	155	target_path[PATH_MAX-1] = 0;
	156	} else {
	157	kfree(target_path);
	158	target_path = ERR_PTR(rc);
	159	}
	160
	161	out:
	162	kfree(full_path);
	163	out_no_free:
	164	FreeXid(xid);
	165	nd_set_link(nd, target_path);
cc314eef	166	return NULL; /* No cookie */
1da177e4 LT	167	}
	168
	169	int
	170	cifs_symlink(struct inode inode, struct dentry direntry, const char *symname)
	171	{
	172	int rc = -EOPNOTSUPP;
	173	int xid;
	174	struct cifs_sb_info *cifs_sb;
	175	struct cifsTconInfo *pTcon;
	176	char *full_path = NULL;
	177	struct inode *newinode = NULL;
	178
	179	xid = GetXid();
	180
	181	cifs_sb = CIFS_SB(inode->i_sb);
	182	pTcon = cifs_sb->tcon;
	183
7f57356b	184	full_path = build_path_from_dentry(direntry);
1da177e4	185
fb8c4b14	186	if (full_path == NULL) {
1da177e4 LT	187	FreeXid(xid);
	188	return -ENOMEM;
	189	}
	190
26a21b98	191	cFYI(1, ("Full path: %s", full_path));
1da177e4 LT	192	cFYI(1, ("symname is %s", symname));
	193
	194	/* BB what if DFS and this volume is on different share? BB */
c18c842b	195	if (pTcon->unix_ext)
1da177e4 LT	196	rc = CIFSUnixCreateSymLink(xid, pTcon, full_path, symname,
	197	cifs_sb->local_nls);
	198	/* else
fb8c4b14 SF	199	rc = CIFSCreateReparseSymLink(xid, pTcon, fromName, toName,
fb8c4b14 SF	200	cifs_sb_target->local_nls); */
1da177e4 LT	201
1da177e4 LT	202	if (rc == 0) {
c18c842b	203	if (pTcon->unix_ext)
1da177e4	204	rc = cifs_get_inode_info_unix(&newinode, full_path,
fb8c4b14	205	inode->i_sb, xid);
1da177e4 LT	206	else
1da177e4 LT	207	rc = cifs_get_inode_info(&newinode, full_path, NULL,
8b1327f6	208	inode->i_sb, xid, NULL);
1da177e4 LT	209
1da177e4 LT	210	if (rc != 0) {
26a21b98	211	cFYI(1, ("Create symlink ok, getinodeinfo fail rc = %d",
1da177e4 LT	212	rc));
1da177e4 LT	213	} else {
b92327fe SF	214	if (pTcon->nocase)
	215	direntry->d_op = &cifs_ci_dentry_ops;
	216	else
	217	direntry->d_op = &cifs_dentry_ops;
1da177e4 LT	218	d_instantiate(direntry, newinode);
	219	}
	220	}
	221
f99d49ad	222	kfree(full_path);
1da177e4 LT	223	FreeXid(xid);
	224	return rc;
	225	}
	226
	227	int
	228	cifs_readlink(struct dentry direntry, char __user pBuffer, int buflen)
	229	{
	230	struct inode *inode = direntry->d_inode;
	231	int rc = -EACCES;
	232	int xid;
4b18f2a9	233	int oplock = 0;
1da177e4 LT	234	struct cifs_sb_info *cifs_sb;
	235	struct cifsTconInfo *pTcon;
	236	char *full_path = NULL;
fb8c4b14	237	char *tmpbuffer;
1da177e4 LT	238	int len;
	239	__u16 fid;
	240
	241	xid = GetXid();
	242	cifs_sb = CIFS_SB(inode->i_sb);
	243	pTcon = cifs_sb->tcon;
	244
fb8c4b14	245	/* BB would it be safe against deadlock to grab this sem
1da177e4	246	even though rename itself grabs the sem and calls lookup? */
a11f3a05	247	/* mutex_lock(&inode->i_sb->s_vfs_rename_mutex);*/
7f57356b	248	full_path = build_path_from_dentry(direntry);
a11f3a05	249	/* mutex_unlock(&inode->i_sb->s_vfs_rename_mutex);*/
1da177e4	250
fb8c4b14	251	if (full_path == NULL) {
1da177e4 LT	252	FreeXid(xid);
	253	return -ENOMEM;
	254	}
	255
	256	cFYI(1,
	257	("Full path: %s inode = 0x%p pBuffer = 0x%p buflen = %d",
	258	full_path, inode, pBuffer, buflen));
fb8c4b14	259	if (buflen > PATH_MAX)
1da177e4 LT	260	len = PATH_MAX;
	261	else
	262	len = buflen;
fb8c4b14 SF	263	tmpbuffer = kmalloc(len, GFP_KERNEL);
fb8c4b14 SF	264	if (tmpbuffer == NULL) {
f99d49ad	265	kfree(full_path);
1da177e4 LT	266	FreeXid(xid);
	267	return -ENOMEM;
	268	}
	269
fb8c4b14 SF	270	/* BB add read reparse point symlink code and
fb8c4b14 SF	271	Unix extensions symlink code here BB */
c18c842b	272	/* We could disable this based on pTcon->unix_ext flag instead ... but why? */
1da177e4 LT	273	if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
	274	rc = CIFSSMBUnixQuerySymLink(xid, pTcon, full_path,
	275	tmpbuffer,
	276	len - 1,
	277	cifs_sb->local_nls);
1bd5bbcb	278	else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
fb8c4b14	279	cERROR(1, ("SFU style symlinks not implemented yet"));
1bd5bbcb	280	/* add open and read as in fs/cifs/inode.c */
1bd5bbcb	281	} else {
1da177e4	282	rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, GENERIC_READ,
fb8c4b14 SF	283	OPEN_REPARSE_POINT, &fid, &oplock, NULL,
	284	cifs_sb->local_nls,
	285	cifs_sb->mnt_cifs_flags &
737b758c	286	CIFS_MOUNT_MAP_SPECIAL_CHR);
fb8c4b14	287	if (!rc) {
1da177e4 LT	288	rc = CIFSSMBQueryReparseLinkInfo(xid, pTcon, full_path,
1da177e4 LT	289	tmpbuffer,
fb8c4b14	290	len - 1,
1da177e4 LT	291	fid,
1da177e4 LT	292	cifs_sb->local_nls);
fb8c4b14	293	if (CIFSSMBClose(xid, pTcon, fid)) {
63135e08 SF	294	cFYI(1, ("Error closing junction point "
63135e08 SF	295	"(open for ioctl)"));
1da177e4	296	}
646dd539 SF	297	/* If it is a DFS junction earlier we would have gotten
	298	PATH_NOT_COVERED returned from server so we do
	299	not need to request the DFS info here */
1da177e4 LT	300	}
	301	}
	302	/* BB Anything else to do to handle recursive links? */
	303	/* BB Should we be using page ops here? */
	304
	305	/* BB null terminate returned string in pBuffer? BB */
	306	if (rc == 0) {
	307	rc = vfs_readlink(direntry, pBuffer, len, tmpbuffer);
	308	cFYI(1,
	309	("vfs_readlink called from cifs_readlink returned %d",
	310	rc));
	311	}
	312
f99d49ad JJ	313	kfree(tmpbuffer);
f99d49ad JJ	314	kfree(full_path);
1da177e4 LT	315	FreeXid(xid);
	316	return rc;
	317	}
	318
cc314eef	319	void cifs_put_link(struct dentry direntry, struct nameidata nd, void *cookie)
1da177e4 LT	320	{
	321	char *p = nd_get_link(nd);
	322	if (!IS_ERR(p))
	323	kfree(p);
	324	}