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

/*
 *   fs/cifs/xattr.c
 *
 *   Copyright (c) International Business Machines  Corp., 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/posix_acl_xattr.h>
#include "cifsfs.h"
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
#include "cifs_debug.h"

#define MAX_EA_VALUE_SIZE 65535
#define CIFS_XATTR_DOS_ATTRIB "user.DosAttrib"
#define CIFS_XATTR_USER_PREFIX "user."
#define CIFS_XATTR_SYSTEM_PREFIX "system."
#define CIFS_XATTR_OS2_PREFIX "os2."
#define CIFS_XATTR_SECURITY_PREFIX ".security"
#define CIFS_XATTR_TRUSTED_PREFIX "trusted."
#define XATTR_TRUSTED_PREFIX_LEN  8
#define XATTR_SECURITY_PREFIX_LEN 9
/* BB need to add server (Samba e.g) support for security and trusted prefix */
  

int cifs_removexattr(struct dentry * direntry, const char * ea_name)
{
	int rc = -EOPNOTSUPP;
#ifdef CONFIG_CIFS_XATTR
	int xid;
	struct cifs_sb_info *cifs_sb;
	struct cifsTconInfo *pTcon;
	struct super_block * sb;
	char * full_path;
                                                                                     
	if(direntry == NULL)
		return -EIO;
	if(direntry->d_inode == NULL)
		return -EIO;
	sb = direntry->d_inode->i_sb;
	if(sb == NULL)
		return -EIO;
	xid = GetXid();
                                                                                     
	cifs_sb = CIFS_SB(sb);
	pTcon = cifs_sb->tcon;
                                                                                     
	down(&sb->s_vfs_rename_sem);
	full_path = build_path_from_dentry(direntry);
	up(&sb->s_vfs_rename_sem);
	if(full_path == NULL) {
		FreeXid(xid);
		return -ENOMEM;
	}
	if(ea_name == NULL) {
		cFYI(1,("Null xattr names not supported"));
	} else if(strncmp(ea_name,CIFS_XATTR_USER_PREFIX,5)
		&& (strncmp(ea_name,CIFS_XATTR_OS2_PREFIX,4))) {
		cFYI(1,("illegal xattr namespace %s (only user namespace supported)",ea_name));
		/* BB what if no namespace prefix? */
		/* Should we just pass them to server, except for
		system and perhaps security prefixes? */
	} else {
		if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
			goto remove_ea_exit;

		ea_name+=5; /* skip past user. prefix */
		rc = CIFSSMBSetEA(xid,pTcon,full_path,ea_name,NULL,
			(__u16)0, cifs_sb->local_nls,
			cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
	}
remove_ea_exit:
	if (full_path)
		kfree(full_path);
	FreeXid(xid);
#endif
	return rc;
}

int cifs_setxattr(struct dentry * direntry, const char * ea_name,
        const void * ea_value, size_t value_size, int flags)
{
	int rc = -EOPNOTSUPP;
#ifdef CONFIG_CIFS_XATTR
	int xid;
	struct cifs_sb_info *cifs_sb;
	struct cifsTconInfo *pTcon;
	struct super_block * sb;
	char * full_path;

	if(direntry == NULL)
		return -EIO;
	if(direntry->d_inode == NULL)
		return -EIO;
	sb = direntry->d_inode->i_sb;
	if(sb == NULL)
		return -EIO;
	xid = GetXid();

	cifs_sb = CIFS_SB(sb);
	pTcon = cifs_sb->tcon;

	down(&sb->s_vfs_rename_sem);
	full_path = build_path_from_dentry(direntry);
	up(&sb->s_vfs_rename_sem);
	if(full_path == NULL) {
		FreeXid(xid);
		return -ENOMEM;
	}
	/* return dos attributes as pseudo xattr */
	/* return alt name if available as pseudo attr */

	/* if proc/fs/cifs/streamstoxattr is set then
		search server for EAs or streams to 
		returns as xattrs */
	if(value_size > MAX_EA_VALUE_SIZE) {
		cFYI(1,("size of EA value too large"));
		if(full_path)
			kfree(full_path);
		FreeXid(xid);
		return -EOPNOTSUPP;
	}

	if(ea_name == NULL) {
		cFYI(1,("Null xattr names not supported"));
	} else if(strncmp(ea_name,CIFS_XATTR_USER_PREFIX,5) == 0) {
		if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
			goto set_ea_exit;
		if(strncmp(ea_name,CIFS_XATTR_DOS_ATTRIB,14) == 0) {
			cFYI(1,("attempt to set cifs inode metadata"));
		}
		ea_name += 5; /* skip past user. prefix */
		rc = CIFSSMBSetEA(xid,pTcon,full_path,ea_name,ea_value,
			(__u16)value_size, cifs_sb->local_nls,
			cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
	} else if(strncmp(ea_name, CIFS_XATTR_OS2_PREFIX,4) == 0) {
		if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
			goto set_ea_exit;

		ea_name += 4; /* skip past os2. prefix */
		rc = CIFSSMBSetEA(xid,pTcon,full_path,ea_name,ea_value,
			(__u16)value_size, cifs_sb->local_nls,
			cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
	} else {
		int temp; 
		temp = strncmp(ea_name,POSIX_ACL_XATTR_ACCESS,
			strlen(POSIX_ACL_XATTR_ACCESS));
		if (temp == 0) {
#ifdef CONFIG_CIFS_POSIX
			if(sb->s_flags & MS_POSIXACL)
				rc = CIFSSMBSetPosixACL(xid, pTcon,full_path,
					ea_value, (const int)value_size, 
					ACL_TYPE_ACCESS,cifs_sb->local_nls,
					cifs_sb->mnt_cifs_flags & 
						CIFS_MOUNT_MAP_SPECIAL_CHR);
			cFYI(1,("set POSIX ACL rc %d",rc));
#else
			cFYI(1,("set POSIX ACL not supported"));
#endif
		} else if(strncmp(ea_name,POSIX_ACL_XATTR_DEFAULT,strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
#ifdef CONFIG_CIFS_POSIX
			if(sb->s_flags & MS_POSIXACL)
				rc = CIFSSMBSetPosixACL(xid, pTcon,full_path,
					ea_value, (const int)value_size, 
					ACL_TYPE_DEFAULT, cifs_sb->local_nls,
					cifs_sb->mnt_cifs_flags & 
						CIFS_MOUNT_MAP_SPECIAL_CHR);
			cFYI(1,("set POSIX default ACL rc %d",rc));
#else
			cFYI(1,("set default POSIX ACL not supported"));
#endif
		} else {
			cFYI(1,("illegal xattr request %s (only user namespace supported)",ea_name));
		  /* BB what if no namespace prefix? */
		  /* Should we just pass them to server, except for 
		  system and perhaps security prefixes? */
		}
	}

set_ea_exit:
	if (full_path)
		kfree(full_path);
	FreeXid(xid);
#endif
	return rc;
}

ssize_t cifs_getxattr(struct dentry * direntry, const char * ea_name,
         void * ea_value, size_t buf_size)
{
	ssize_t rc = -EOPNOTSUPP;
#ifdef CONFIG_CIFS_XATTR
	int xid;
	struct cifs_sb_info *cifs_sb;
	struct cifsTconInfo *pTcon;
	struct super_block * sb;
	char * full_path;

	if(direntry == NULL)
		return -EIO;
	if(direntry->d_inode == NULL)
		return -EIO;
	sb = direntry->d_inode->i_sb;
	if(sb == NULL)
		return -EIO;

	xid = GetXid();

	cifs_sb = CIFS_SB(sb);
	pTcon = cifs_sb->tcon;

	down(&sb->s_vfs_rename_sem);
	full_path = build_path_from_dentry(direntry);
	up(&sb->s_vfs_rename_sem);
	if(full_path == NULL) {
		FreeXid(xid);
		return -ENOMEM;
	}
	/* return dos attributes as pseudo xattr */
	/* return alt name if available as pseudo attr */
	if(ea_name == NULL) {
		cFYI(1,("Null xattr names not supported"));
	} else if(strncmp(ea_name,CIFS_XATTR_USER_PREFIX,5) == 0) {
		if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
			goto get_ea_exit;

		if(strncmp(ea_name,CIFS_XATTR_DOS_ATTRIB,14) == 0) {
			cFYI(1,("attempt to query cifs inode metadata"));
			/* revalidate/getattr then populate from inode */
		} /* BB add else when above is implemented */
		ea_name += 5; /* skip past user. prefix */
		rc = CIFSSMBQueryEA(xid,pTcon,full_path,ea_name,ea_value,
			buf_size, cifs_sb->local_nls,
			cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
	} else if(strncmp(ea_name, CIFS_XATTR_OS2_PREFIX,4) == 0) {
		if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
			goto get_ea_exit;

		ea_name += 4; /* skip past os2. prefix */
		rc = CIFSSMBQueryEA(xid,pTcon,full_path,ea_name,ea_value,
			buf_size, cifs_sb->local_nls,
			cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
	} else if(strncmp(ea_name,POSIX_ACL_XATTR_ACCESS,strlen(POSIX_ACL_XATTR_ACCESS)) == 0) {
#ifdef CONFIG_CIFS_POSIX
		if(sb->s_flags & MS_POSIXACL)
			rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
				ea_value, buf_size, ACL_TYPE_ACCESS, 
				cifs_sb->local_nls,
				cifs_sb->mnt_cifs_flags & 
					CIFS_MOUNT_MAP_SPECIAL_CHR);
#else 
		cFYI(1,("query POSIX ACL not supported yet"));
#endif /* CONFIG_CIFS_POSIX */
	} else if(strncmp(ea_name,POSIX_ACL_XATTR_DEFAULT,strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
#ifdef CONFIG_CIFS_POSIX
		if(sb->s_flags & MS_POSIXACL)
			rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
				ea_value, buf_size, ACL_TYPE_DEFAULT, 
				cifs_sb->local_nls,
				cifs_sb->mnt_cifs_flags & 
					CIFS_MOUNT_MAP_SPECIAL_CHR);
#else 
		cFYI(1,("query POSIX default ACL not supported yet"));
#endif
	} else if(strncmp(ea_name,
		  CIFS_XATTR_TRUSTED_PREFIX,XATTR_TRUSTED_PREFIX_LEN) == 0) {
		cFYI(1,("Trusted xattr namespace not supported yet"));
	} else if(strncmp(ea_name,
		  CIFS_XATTR_SECURITY_PREFIX,XATTR_SECURITY_PREFIX_LEN) == 0) {
		cFYI(1,("Security xattr namespace not supported yet"));
	} else {
		cFYI(1,("illegal xattr name request %s (only user namespace supported)",ea_name));
	}

	/* We could add an additional check for streams ie 
	    if proc/fs/cifs/streamstoxattr is set then
		search server for EAs or streams to 
		returns as xattrs */

	if(rc == -EINVAL)
		rc = -EOPNOTSUPP; 

get_ea_exit:
	if (full_path)
		kfree(full_path);
	FreeXid(xid);
#endif
	return rc;
}

ssize_t cifs_listxattr(struct dentry * direntry, char * data, size_t buf_size)
{
	ssize_t rc = -EOPNOTSUPP;
#ifdef CONFIG_CIFS_XATTR
	int xid;
	struct cifs_sb_info *cifs_sb;
	struct cifsTconInfo *pTcon;
	struct super_block * sb;
	char * full_path;

	if(direntry == NULL)
		return -EIO;
	if(direntry->d_inode == NULL)
		return -EIO;
	sb = direntry->d_inode->i_sb;
	if(sb == NULL)
		return -EIO;
	xid = GetXid();

	cifs_sb = CIFS_SB(sb);
	pTcon = cifs_sb->tcon;

	down(&sb->s_vfs_rename_sem);
	full_path = build_path_from_dentry(direntry);
	up(&sb->s_vfs_rename_sem);
	if(full_path == NULL) {
		FreeXid(xid);
		return -ENOMEM;
	}
	/* return dos attributes as pseudo xattr */
	/* return alt name if available as pseudo attr */

	/* if proc/fs/cifs/streamstoxattr is set then
		search server for EAs or streams to 
		returns as xattrs */
	rc = CIFSSMBQAllEAs(xid,pTcon,full_path,data,buf_size,
				cifs_sb->local_nls,
				cifs_sb->mnt_cifs_flags & 
					CIFS_MOUNT_MAP_SPECIAL_CHR);

	if (full_path)
		kfree(full_path);
	FreeXid(xid);
#endif
	return rc;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* fs/cifs/xattr.c
	3	*
	4	* Copyright (c) International Business Machines Corp., 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
	22	#include <linux/fs.h>
	23	#include <linux/posix_acl_xattr.h>
	24	#include "cifsfs.h"
	25	#include "cifspdu.h"
	26	#include "cifsglob.h"
	27	#include "cifsproto.h"
	28	#include "cifs_debug.h"
	29
	30	#define MAX_EA_VALUE_SIZE 65535
	31	#define CIFS_XATTR_DOS_ATTRIB "user.DosAttrib"
	32	#define CIFS_XATTR_USER_PREFIX "user."
	33	#define CIFS_XATTR_SYSTEM_PREFIX "system."
	34	#define CIFS_XATTR_OS2_PREFIX "os2."
	35	#define CIFS_XATTR_SECURITY_PREFIX ".security"
	36	#define CIFS_XATTR_TRUSTED_PREFIX "trusted."
	37	#define XATTR_TRUSTED_PREFIX_LEN 8
	38	#define XATTR_SECURITY_PREFIX_LEN 9
	39	/* BB need to add server (Samba e.g) support for security and trusted prefix */
	40
	41
	42
	43	int cifs_removexattr(struct dentry * direntry, const char * ea_name)
	44	{
	45	int rc = -EOPNOTSUPP;
	46	#ifdef CONFIG_CIFS_XATTR
	47	int xid;
	48	struct cifs_sb_info *cifs_sb;
	49	struct cifsTconInfo *pTcon;
	50	struct super_block * sb;
	51	char * full_path;
	52
	53	if(direntry == NULL)
	54	return -EIO;
	55	if(direntry->d_inode == NULL)
	56	return -EIO;
	57	sb = direntry->d_inode->i_sb;
	58	if(sb == NULL)
	59	return -EIO;
	60	xid = GetXid();
	61
	62	cifs_sb = CIFS_SB(sb);
	63	pTcon = cifs_sb->tcon;
	64
65	down(&sb->s_vfs_rename_sem);
66	full_path = build_path_from_dentry(direntry);
67	up(&sb->s_vfs_rename_sem);
68	if(full_path == NULL) {
69	FreeXid(xid);
70	return -ENOMEM;
71	}
72	if(ea_name == NULL) {
73	cFYI(1,("Null xattr names not supported"));
74	} else if(strncmp(ea_name,CIFS_XATTR_USER_PREFIX,5)
75	&& (strncmp(ea_name,CIFS_XATTR_OS2_PREFIX,4))) {
76	cFYI(1,("illegal xattr namespace %s (only user namespace supported)",ea_name));
77	/* BB what if no namespace prefix? */
78	/* Should we just pass them to server, except for
79	system and perhaps security prefixes? */
80	} else {
81	if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
82	goto remove_ea_exit;
83
84	ea_name+=5; /* skip past user. prefix */
85	rc = CIFSSMBSetEA(xid,pTcon,full_path,ea_name,NULL,
737b758c SF	86	(__u16)0, cifs_sb->local_nls,
737b758c SF	87	cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 LT	88	}
	89	remove_ea_exit:
	90	if (full_path)
	91	kfree(full_path);
	92	FreeXid(xid);
	93	#endif
	94	return rc;
	95	}
	96
	97	int cifs_setxattr(struct dentry * direntry, const char * ea_name,
	98	const void * ea_value, size_t value_size, int flags)
	99	{
	100	int rc = -EOPNOTSUPP;
	101	#ifdef CONFIG_CIFS_XATTR
	102	int xid;
	103	struct cifs_sb_info *cifs_sb;
	104	struct cifsTconInfo *pTcon;
	105	struct super_block * sb;
	106	char * full_path;
	107
	108	if(direntry == NULL)
	109	return -EIO;
	110	if(direntry->d_inode == NULL)
	111	return -EIO;
	112	sb = direntry->d_inode->i_sb;
	113	if(sb == NULL)
	114	return -EIO;
	115	xid = GetXid();
	116
	117	cifs_sb = CIFS_SB(sb);
	118	pTcon = cifs_sb->tcon;
	119
	120	down(&sb->s_vfs_rename_sem);
	121	full_path = build_path_from_dentry(direntry);
	122	up(&sb->s_vfs_rename_sem);
	123	if(full_path == NULL) {
	124	FreeXid(xid);
	125	return -ENOMEM;
	126	}
	127	/* return dos attributes as pseudo xattr */
	128	/* return alt name if available as pseudo attr */
	129
	130	/* if proc/fs/cifs/streamstoxattr is set then
	131	search server for EAs or streams to
	132	returns as xattrs */
	133	if(value_size > MAX_EA_VALUE_SIZE) {
	134	cFYI(1,("size of EA value too large"));
	135	if(full_path)
	136	kfree(full_path);
	137	FreeXid(xid);
	138	return -EOPNOTSUPP;
	139	}
	140
	141	if(ea_name == NULL) {
	142	cFYI(1,("Null xattr names not supported"));
	143	} else if(strncmp(ea_name,CIFS_XATTR_USER_PREFIX,5) == 0) {
	144	if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
	145	goto set_ea_exit;
	146	if(strncmp(ea_name,CIFS_XATTR_DOS_ATTRIB,14) == 0) {
	147	cFYI(1,("attempt to set cifs inode metadata"));
	148	}
	149	ea_name += 5; /* skip past user. prefix */
	150	rc = CIFSSMBSetEA(xid,pTcon,full_path,ea_name,ea_value,
737b758c SF	151	(__u16)value_size, cifs_sb->local_nls,
737b758c SF	152	cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 LT	153	} else if(strncmp(ea_name, CIFS_XATTR_OS2_PREFIX,4) == 0) {
	154	if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
	155	goto set_ea_exit;
	156
	157	ea_name += 4; /* skip past os2. prefix */
	158	rc = CIFSSMBSetEA(xid,pTcon,full_path,ea_name,ea_value,
737b758c SF	159	(__u16)value_size, cifs_sb->local_nls,
737b758c SF	160	cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 LT	161	} else {
	162	int temp;
	163	temp = strncmp(ea_name,POSIX_ACL_XATTR_ACCESS,
	164	strlen(POSIX_ACL_XATTR_ACCESS));
	165	if (temp == 0) {
	166	#ifdef CONFIG_CIFS_POSIX
1da0c78b SF	167	if(sb->s_flags & MS_POSIXACL)
	168	rc = CIFSSMBSetPosixACL(xid, pTcon,full_path,
	169	ea_value, (const int)value_size,
737b758c SF	170	ACL_TYPE_ACCESS,cifs_sb->local_nls,
	171	cifs_sb->mnt_cifs_flags &
	172	CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 LT	173	cFYI(1,("set POSIX ACL rc %d",rc));
	174	#else
	175	cFYI(1,("set POSIX ACL not supported"));
	176	#endif
	177	} else if(strncmp(ea_name,POSIX_ACL_XATTR_DEFAULT,strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
	178	#ifdef CONFIG_CIFS_POSIX
1da0c78b SF	179	if(sb->s_flags & MS_POSIXACL)
	180	rc = CIFSSMBSetPosixACL(xid, pTcon,full_path,
	181	ea_value, (const int)value_size,
737b758c SF	182	ACL_TYPE_DEFAULT, cifs_sb->local_nls,
	183	cifs_sb->mnt_cifs_flags &
	184	CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 LT	185	cFYI(1,("set POSIX default ACL rc %d",rc));
	186	#else
	187	cFYI(1,("set default POSIX ACL not supported"));
	188	#endif
	189	} else {
	190	cFYI(1,("illegal xattr request %s (only user namespace supported)",ea_name));
	191	/* BB what if no namespace prefix? */
	192	/* Should we just pass them to server, except for
	193	system and perhaps security prefixes? */
	194	}
	195	}
	196
	197	set_ea_exit:
	198	if (full_path)
	199	kfree(full_path);
	200	FreeXid(xid);
	201	#endif
	202	return rc;
	203	}
	204
	205	ssize_t cifs_getxattr(struct dentry * direntry, const char * ea_name,
	206	void * ea_value, size_t buf_size)
	207	{
	208	ssize_t rc = -EOPNOTSUPP;
	209	#ifdef CONFIG_CIFS_XATTR
	210	int xid;
	211	struct cifs_sb_info *cifs_sb;
	212	struct cifsTconInfo *pTcon;
	213	struct super_block * sb;
	214	char * full_path;
	215
	216	if(direntry == NULL)
	217	return -EIO;
	218	if(direntry->d_inode == NULL)
	219	return -EIO;
	220	sb = direntry->d_inode->i_sb;
	221	if(sb == NULL)
	222	return -EIO;
	223
	224	xid = GetXid();
	225
	226	cifs_sb = CIFS_SB(sb);
	227	pTcon = cifs_sb->tcon;
	228
	229	down(&sb->s_vfs_rename_sem);
	230	full_path = build_path_from_dentry(direntry);
	231	up(&sb->s_vfs_rename_sem);
	232	if(full_path == NULL) {
	233	FreeXid(xid);
	234	return -ENOMEM;
	235	}
	236	/* return dos attributes as pseudo xattr */
	237	/* return alt name if available as pseudo attr */
	238	if(ea_name == NULL) {
	239	cFYI(1,("Null xattr names not supported"));
	240	} else if(strncmp(ea_name,CIFS_XATTR_USER_PREFIX,5) == 0) {
	241	if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
	242	goto get_ea_exit;
	243
	244	if(strncmp(ea_name,CIFS_XATTR_DOS_ATTRIB,14) == 0) {
	245	cFYI(1,("attempt to query cifs inode metadata"));
	246	/* revalidate/getattr then populate from inode */
	247	} /* BB add else when above is implemented */
	248	ea_name += 5; /* skip past user. prefix */
249	rc = CIFSSMBQueryEA(xid,pTcon,full_path,ea_name,ea_value,
737b758c SF	250	buf_size, cifs_sb->local_nls,
737b758c SF	251	cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 LT	252	} else if(strncmp(ea_name, CIFS_XATTR_OS2_PREFIX,4) == 0) {
	253	if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
	254	goto get_ea_exit;
	255
	256	ea_name += 4; /* skip past os2. prefix */
	257	rc = CIFSSMBQueryEA(xid,pTcon,full_path,ea_name,ea_value,
737b758c SF	258	buf_size, cifs_sb->local_nls,
737b758c SF	259	cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 LT	260	} else if(strncmp(ea_name,POSIX_ACL_XATTR_ACCESS,strlen(POSIX_ACL_XATTR_ACCESS)) == 0) {
1da177e4 LT	261	#ifdef CONFIG_CIFS_POSIX
1da0c78b SF	262	if(sb->s_flags & MS_POSIXACL)
1da0c78b SF	263	rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
1da177e4	264	ea_value, buf_size, ACL_TYPE_ACCESS,
737b758c SF	265	cifs_sb->local_nls,
	266	cifs_sb->mnt_cifs_flags &
	267	CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 LT	268	#else
	269	cFYI(1,("query POSIX ACL not supported yet"));
	270	#endif /* CONFIG_CIFS_POSIX */
	271	} else if(strncmp(ea_name,POSIX_ACL_XATTR_DEFAULT,strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
	272	#ifdef CONFIG_CIFS_POSIX
1da0c78b SF	273	if(sb->s_flags & MS_POSIXACL)
1da0c78b SF	274	rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
1da177e4	275	ea_value, buf_size, ACL_TYPE_DEFAULT,
737b758c SF	276	cifs_sb->local_nls,
	277	cifs_sb->mnt_cifs_flags &
	278	CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 LT	279	#else
	280	cFYI(1,("query POSIX default ACL not supported yet"));
	281	#endif
	282	} else if(strncmp(ea_name,
	283	CIFS_XATTR_TRUSTED_PREFIX,XATTR_TRUSTED_PREFIX_LEN) == 0) {
	284	cFYI(1,("Trusted xattr namespace not supported yet"));
	285	} else if(strncmp(ea_name,
	286	CIFS_XATTR_SECURITY_PREFIX,XATTR_SECURITY_PREFIX_LEN) == 0) {
	287	cFYI(1,("Security xattr namespace not supported yet"));
	288	} else {
	289	cFYI(1,("illegal xattr name request %s (only user namespace supported)",ea_name));
	290	}
	291
	292	/* We could add an additional check for streams ie
	293	if proc/fs/cifs/streamstoxattr is set then
	294	search server for EAs or streams to
	295	returns as xattrs */
	296
	297	if(rc == -EINVAL)
	298	rc = -EOPNOTSUPP;
	299
	300	get_ea_exit:
	301	if (full_path)
	302	kfree(full_path);
	303	FreeXid(xid);
	304	#endif
	305	return rc;
	306	}
	307
	308	ssize_t cifs_listxattr(struct dentry * direntry, char * data, size_t buf_size)
	309	{
	310	ssize_t rc = -EOPNOTSUPP;
	311	#ifdef CONFIG_CIFS_XATTR
	312	int xid;
	313	struct cifs_sb_info *cifs_sb;
	314	struct cifsTconInfo *pTcon;
	315	struct super_block * sb;
	316	char * full_path;
	317
	318	if(direntry == NULL)
	319	return -EIO;
	320	if(direntry->d_inode == NULL)
	321	return -EIO;
	322	sb = direntry->d_inode->i_sb;
	323	if(sb == NULL)
	324	return -EIO;
	325	xid = GetXid();
	326
	327	cifs_sb = CIFS_SB(sb);
	328	pTcon = cifs_sb->tcon;
	329
	330	down(&sb->s_vfs_rename_sem);
	331	full_path = build_path_from_dentry(direntry);
	332	up(&sb->s_vfs_rename_sem);
	333	if(full_path == NULL) {
	334	FreeXid(xid);
	335	return -ENOMEM;
	336	}
	337	/* return dos attributes as pseudo xattr */
	338	/* return alt name if available as pseudo attr */
	339
	340	/* if proc/fs/cifs/streamstoxattr is set then
	341	search server for EAs or streams to
	342	returns as xattrs */
343	rc = CIFSSMBQAllEAs(xid,pTcon,full_path,data,buf_size,
737b758c SF	344	cifs_sb->local_nls,
	345	cifs_sb->mnt_cifs_flags &
	346	CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 LT	347
	348	if (full_path)
	349	kfree(full_path);
	350	FreeXid(xid);
	351	#endif
	352	return rc;
	353	}