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

/*
 *   fs/cifs/xattr.c
 *
 *   Copyright (c) International Business Machines  Corp., 2003, 2007
 *   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;

	full_path = build_path_from_dentry(direntry);
	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 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? */
	} 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:
	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;

	full_path = build_path_from_dentry(direntry);
	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"));
		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:
	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;

	full_path = build_path_from_dentry(direntry);
	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);
#ifdef CONFIG_CIFS_EXPERIMENTAL
		else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
			__u16 fid;
			int oplock = 0;
			struct cifs_ntsd *pacl = NULL;
			__u32 buflen = 0;
			if (experimEnabled)
				rc = CIFSSMBOpen(xid, pTcon, full_path,
					FILE_OPEN, GENERIC_READ, 0, &fid,
					&oplock, NULL, cifs_sb->local_nls,
					cifs_sb->mnt_cifs_flags &
					CIFS_MOUNT_MAP_SPECIAL_CHR);
			/* else rc is EOPNOTSUPP from above */

			if (rc == 0) {
				rc = CIFSSMBGetCIFSACL(xid, pTcon, fid, &pacl,
						      &buflen);
				CIFSSMBClose(xid, pTcon, fid);
			}
		}
#endif /* EXPERIMENTAL */
#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 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:
	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;

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

	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
		return -EOPNOTSUPP;

	xid = GetXid();

	full_path = build_path_from_dentry(direntry);
	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);

	kfree(full_path);
	FreeXid(xid);
#endif
	return rc;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* fs/cifs/xattr.c
	3	*
79a58d1f	4	* Copyright (c) International Business Machines Corp., 2003, 2007
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
	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 */
50c2f753	40
1da177e4 LT	41
1da177e4 LT	42
79a58d1f	43	int cifs_removexattr(struct dentry direntry, const char ea_name)
1da177e4 LT	44	{
	45	int rc = -EOPNOTSUPP;
	46	#ifdef CONFIG_CIFS_XATTR
	47	int xid;
	48	struct cifs_sb_info *cifs_sb;
	49	struct cifsTconInfo *pTcon;
79a58d1f SF	50	struct super_block *sb;
	51	char *full_path;
	52
	53	if (direntry == NULL)
1da177e4	54	return -EIO;
79a58d1f	55	if (direntry->d_inode == NULL)
1da177e4 LT	56	return -EIO;
1da177e4 LT	57	sb = direntry->d_inode->i_sb;
79a58d1f	58	if (sb == NULL)
1da177e4 LT	59	return -EIO;
1da177e4 LT	60	xid = GetXid();
79a58d1f	61
1da177e4 LT	62	cifs_sb = CIFS_SB(sb);
1da177e4 LT	63	pTcon = cifs_sb->tcon;
79a58d1f	64
1da177e4	65	full_path = build_path_from_dentry(direntry);
79a58d1f	66	if (full_path == NULL) {
1da177e4 LT	67	FreeXid(xid);
	68	return -ENOMEM;
	69	}
79a58d1f SF	70	if (ea_name == NULL) {
	71	cFYI(1, ("Null xattr names not supported"));
	72	} else if (strncmp(ea_name, CIFS_XATTR_USER_PREFIX, 5)
	73	&& (strncmp(ea_name, CIFS_XATTR_OS2_PREFIX, 4))) {
	74	cFYI(1,
	75	("illegal xattr request %s (only user namespace supported)",
	76	ea_name));
1da177e4 LT	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 {
79a58d1f	81	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
1da177e4 LT	82	goto remove_ea_exit;
1da177e4 LT	83
79a58d1f SF	84	ea_name += 5; /* skip past user. prefix */
79a58d1f SF	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	}
1da177e4 LT	89	remove_ea_exit:
f99d49ad	90	kfree(full_path);
1da177e4 LT	91	FreeXid(xid);
	92	#endif
	93	return rc;
	94	}
	95
79a58d1f SF	96	int cifs_setxattr(struct dentry direntry, const char ea_name,
79a58d1f SF	97	const void *ea_value, size_t value_size, int flags)
1da177e4 LT	98	{
	99	int rc = -EOPNOTSUPP;
	100	#ifdef CONFIG_CIFS_XATTR
	101	int xid;
	102	struct cifs_sb_info *cifs_sb;
	103	struct cifsTconInfo *pTcon;
79a58d1f SF	104	struct super_block *sb;
79a58d1f SF	105	char *full_path;
1da177e4	106
79a58d1f	107	if (direntry == NULL)
1da177e4	108	return -EIO;
79a58d1f	109	if (direntry->d_inode == NULL)
1da177e4 LT	110	return -EIO;
1da177e4 LT	111	sb = direntry->d_inode->i_sb;
79a58d1f	112	if (sb == NULL)
1da177e4 LT	113	return -EIO;
	114	xid = GetXid();
	115
	116	cifs_sb = CIFS_SB(sb);
	117	pTcon = cifs_sb->tcon;
	118
1da177e4	119	full_path = build_path_from_dentry(direntry);
79a58d1f	120	if (full_path == NULL) {
1da177e4 LT	121	FreeXid(xid);
	122	return -ENOMEM;
	123	}
	124	/* return dos attributes as pseudo xattr */
	125	/* return alt name if available as pseudo attr */
	126
	127	/* if proc/fs/cifs/streamstoxattr is set then
79a58d1f	128	search server for EAs or streams to
1da177e4	129	returns as xattrs */
79a58d1f SF	130	if (value_size > MAX_EA_VALUE_SIZE) {
79a58d1f SF	131	cFYI(1, ("size of EA value too large"));
f99d49ad	132	kfree(full_path);
1da177e4 LT	133	FreeXid(xid);
	134	return -EOPNOTSUPP;
	135	}
	136
79a58d1f SF	137	if (ea_name == NULL) {
	138	cFYI(1, ("Null xattr names not supported"));
	139	} else if (strncmp(ea_name, CIFS_XATTR_USER_PREFIX, 5) == 0) {
	140	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
1da177e4	141	goto set_ea_exit;
ad7a2926	142	if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0)
79a58d1f	143	cFYI(1, ("attempt to set cifs inode metadata"));
ad7a2926	144
1da177e4	145	ea_name += 5; /* skip past user. prefix */
79a58d1f	146	rc = CIFSSMBSetEA(xid, pTcon, full_path, ea_name, ea_value,
737b758c SF	147	(__u16)value_size, cifs_sb->local_nls,
737b758c SF	148	cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
79a58d1f SF	149	} else if (strncmp(ea_name, CIFS_XATTR_OS2_PREFIX, 4) == 0) {
79a58d1f SF	150	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
1da177e4 LT	151	goto set_ea_exit;
	152
	153	ea_name += 4; /* skip past os2. prefix */
79a58d1f	154	rc = CIFSSMBSetEA(xid, pTcon, full_path, ea_name, ea_value,
737b758c SF	155	(__u16)value_size, cifs_sb->local_nls,
737b758c SF	156	cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4	157	} else {
79a58d1f SF	158	int temp;
79a58d1f SF	159	temp = strncmp(ea_name, POSIX_ACL_XATTR_ACCESS,
1da177e4 LT	160	strlen(POSIX_ACL_XATTR_ACCESS));
	161	if (temp == 0) {
	162	#ifdef CONFIG_CIFS_POSIX
79a58d1f SF	163	if (sb->s_flags & MS_POSIXACL)
	164	rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
	165	ea_value, (const int)value_size,
	166	ACL_TYPE_ACCESS, cifs_sb->local_nls,
	167	cifs_sb->mnt_cifs_flags &
737b758c	168	CIFS_MOUNT_MAP_SPECIAL_CHR);
79a58d1f	169	cFYI(1, ("set POSIX ACL rc %d", rc));
1da177e4	170	#else
79a58d1f	171	cFYI(1, ("set POSIX ACL not supported"));
1da177e4	172	#endif
79a58d1f SF	173	} else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT,
79a58d1f SF	174	strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
1da177e4	175	#ifdef CONFIG_CIFS_POSIX
79a58d1f SF	176	if (sb->s_flags & MS_POSIXACL)
	177	rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
	178	ea_value, (const int)value_size,
737b758c	179	ACL_TYPE_DEFAULT, cifs_sb->local_nls,
79a58d1f	180	cifs_sb->mnt_cifs_flags &
737b758c	181	CIFS_MOUNT_MAP_SPECIAL_CHR);
79a58d1f	182	cFYI(1, ("set POSIX default ACL rc %d", rc));
1da177e4	183	#else
79a58d1f	184	cFYI(1, ("set default POSIX ACL not supported"));
1da177e4 LT	185	#endif
1da177e4 LT	186	} else {
63135e08 SF	187	cFYI(1, ("illegal xattr request %s (only user namespace"
63135e08 SF	188	" supported)", ea_name));
1da177e4	189	/* BB what if no namespace prefix? */
79a58d1f	190	/* Should we just pass them to server, except for
1da177e4 LT	191	system and perhaps security prefixes? */
	192	}
	193	}
	194
	195	set_ea_exit:
f99d49ad	196	kfree(full_path);
1da177e4 LT	197	FreeXid(xid);
	198	#endif
	199	return rc;
	200	}
	201
79a58d1f SF	202	ssize_t cifs_getxattr(struct dentry direntry, const char ea_name,
79a58d1f SF	203	void *ea_value, size_t buf_size)
1da177e4 LT	204	{
	205	ssize_t rc = -EOPNOTSUPP;
	206	#ifdef CONFIG_CIFS_XATTR
	207	int xid;
	208	struct cifs_sb_info *cifs_sb;
	209	struct cifsTconInfo *pTcon;
79a58d1f SF	210	struct super_block *sb;
79a58d1f SF	211	char *full_path;
1da177e4	212
79a58d1f	213	if (direntry == NULL)
1da177e4	214	return -EIO;
79a58d1f	215	if (direntry->d_inode == NULL)
1da177e4 LT	216	return -EIO;
1da177e4 LT	217	sb = direntry->d_inode->i_sb;
79a58d1f	218	if (sb == NULL)
1da177e4 LT	219	return -EIO;
	220
	221	xid = GetXid();
	222
	223	cifs_sb = CIFS_SB(sb);
	224	pTcon = cifs_sb->tcon;
	225
1da177e4	226	full_path = build_path_from_dentry(direntry);
79a58d1f	227	if (full_path == NULL) {
1da177e4 LT	228	FreeXid(xid);
	229	return -ENOMEM;
	230	}
	231	/* return dos attributes as pseudo xattr */
	232	/* return alt name if available as pseudo attr */
79a58d1f SF	233	if (ea_name == NULL) {
	234	cFYI(1, ("Null xattr names not supported"));
	235	} else if (strncmp(ea_name, CIFS_XATTR_USER_PREFIX, 5) == 0) {
	236	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
1da177e4 LT	237	goto get_ea_exit;
1da177e4 LT	238
79a58d1f SF	239	if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0) {
79a58d1f SF	240	cFYI(1, ("attempt to query cifs inode metadata"));
1da177e4 LT	241	/* revalidate/getattr then populate from inode */
	242	} /* BB add else when above is implemented */
	243	ea_name += 5; /* skip past user. prefix */
79a58d1f	244	rc = CIFSSMBQueryEA(xid, pTcon, full_path, ea_name, ea_value,
737b758c SF	245	buf_size, cifs_sb->local_nls,
737b758c SF	246	cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
79a58d1f SF	247	} else if (strncmp(ea_name, CIFS_XATTR_OS2_PREFIX, 4) == 0) {
79a58d1f SF	248	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
1da177e4 LT	249	goto get_ea_exit;
	250
	251	ea_name += 4; /* skip past os2. prefix */
79a58d1f	252	rc = CIFSSMBQueryEA(xid, pTcon, full_path, ea_name, ea_value,
737b758c SF	253	buf_size, cifs_sb->local_nls,
737b758c SF	254	cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
79a58d1f	255	} else if (strncmp(ea_name, POSIX_ACL_XATTR_ACCESS,
0a4b92c0	256	strlen(POSIX_ACL_XATTR_ACCESS)) == 0) {
1da177e4	257	#ifdef CONFIG_CIFS_POSIX
79a58d1f	258	if (sb->s_flags & MS_POSIXACL)
1da0c78b	259	rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
79a58d1f	260	ea_value, buf_size, ACL_TYPE_ACCESS,
737b758c	261	cifs_sb->local_nls,
79a58d1f	262	cifs_sb->mnt_cifs_flags &
737b758c	263	CIFS_MOUNT_MAP_SPECIAL_CHR);
d12fd121	264	#ifdef CONFIG_CIFS_EXPERIMENTAL
ad7a2926	265	else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
0a4b92c0	266	__u16 fid;
4b18f2a9	267	int oplock = 0;
630f3f0c SF	268	struct cifs_ntsd *pacl = NULL;
630f3f0c SF	269	__u32 buflen = 0;
63d2583f	270	if (experimEnabled)
d12fd121 SF	271	rc = CIFSSMBOpen(xid, pTcon, full_path,
	272	FILE_OPEN, GENERIC_READ, 0, &fid,
	273	&oplock, NULL, cifs_sb->local_nls,
	274	cifs_sb->mnt_cifs_flags &
	275	CIFS_MOUNT_MAP_SPECIAL_CHR);
	276	/* else rc is EOPNOTSUPP from above */
	277
63d2583f	278	if (rc == 0) {
630f3f0c SF	279	rc = CIFSSMBGetCIFSACL(xid, pTcon, fid, &pacl,
630f3f0c SF	280	&buflen);
2fe87f02	281	CIFSSMBClose(xid, pTcon, fid);
0a4b92c0	282	}
d12fd121 SF	283	}
d12fd121 SF	284	#endif /* EXPERIMENTAL */
79a58d1f SF	285	#else
79a58d1f SF	286	cFYI(1, ("query POSIX ACL not supported yet"));
1da177e4	287	#endif /* CONFIG_CIFS_POSIX */
79a58d1f	288	} else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT,
0a4b92c0	289	strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
1da177e4	290	#ifdef CONFIG_CIFS_POSIX
79a58d1f	291	if (sb->s_flags & MS_POSIXACL)
1da0c78b	292	rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
79a58d1f	293	ea_value, buf_size, ACL_TYPE_DEFAULT,
737b758c	294	cifs_sb->local_nls,
79a58d1f	295	cifs_sb->mnt_cifs_flags &
737b758c	296	CIFS_MOUNT_MAP_SPECIAL_CHR);
79a58d1f SF	297	#else
79a58d1f SF	298	cFYI(1, ("query POSIX default ACL not supported yet"));
1da177e4	299	#endif
79a58d1f SF	300	} else if (strncmp(ea_name,
	301	CIFS_XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) == 0) {
	302	cFYI(1, ("Trusted xattr namespace not supported yet"));
	303	} else if (strncmp(ea_name,
	304	CIFS_XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) == 0) {
	305	cFYI(1, ("Security xattr namespace not supported yet"));
ad7a2926	306	} else
79a58d1f SF	307	cFYI(1,
	308	("illegal xattr request %s (only user namespace supported)",
	309	ea_name));
1da177e4	310
79a58d1f	311	/* We could add an additional check for streams ie
1da177e4	312	if proc/fs/cifs/streamstoxattr is set then
79a58d1f	313	search server for EAs or streams to
1da177e4 LT	314	returns as xattrs */
1da177e4 LT	315
79a58d1f SF	316	if (rc == -EINVAL)
79a58d1f SF	317	rc = -EOPNOTSUPP;
1da177e4 LT	318
1da177e4 LT	319	get_ea_exit:
f99d49ad	320	kfree(full_path);
1da177e4 LT	321	FreeXid(xid);
	322	#endif
	323	return rc;
	324	}
	325
79a58d1f	326	ssize_t cifs_listxattr(struct dentry direntry, char data, size_t buf_size)
1da177e4 LT	327	{
	328	ssize_t rc = -EOPNOTSUPP;
	329	#ifdef CONFIG_CIFS_XATTR
	330	int xid;
	331	struct cifs_sb_info *cifs_sb;
	332	struct cifsTconInfo *pTcon;
79a58d1f SF	333	struct super_block *sb;
79a58d1f SF	334	char *full_path;
1da177e4	335
79a58d1f	336	if (direntry == NULL)
1da177e4	337	return -EIO;
79a58d1f	338	if (direntry->d_inode == NULL)
1da177e4 LT	339	return -EIO;
1da177e4 LT	340	sb = direntry->d_inode->i_sb;
79a58d1f	341	if (sb == NULL)
1da177e4	342	return -EIO;
1da177e4 LT	343
	344	cifs_sb = CIFS_SB(sb);
	345	pTcon = cifs_sb->tcon;
	346
79a58d1f	347	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
ea4c07d7 SF	348	return -EOPNOTSUPP;
	349
	350	xid = GetXid();
	351
1da177e4	352	full_path = build_path_from_dentry(direntry);
79a58d1f	353	if (full_path == NULL) {
1da177e4 LT	354	FreeXid(xid);
	355	return -ENOMEM;
	356	}
	357	/* return dos attributes as pseudo xattr */
	358	/* return alt name if available as pseudo attr */
	359
	360	/* if proc/fs/cifs/streamstoxattr is set then
79a58d1f	361	search server for EAs or streams to
1da177e4	362	returns as xattrs */
79a58d1f	363	rc = CIFSSMBQAllEAs(xid, pTcon, full_path, data, buf_size,
737b758c	364	cifs_sb->local_nls,
79a58d1f	365	cifs_sb->mnt_cifs_flags &
737b758c	366	CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4	367
f99d49ad	368	kfree(full_path);
1da177e4 LT	369	FreeXid(xid);
	370	#endif
	371	return rc;
	372	}