[mirror_ubuntu-artful-kernel.git] / fs / cifs / xattr.c

/*
 *   fs/cifs/xattr.c
 *
 *   Copyright (c) International Business Machines  Corp., 2003, 2007
 *   Author(s): Steve French (sfrench@us.ibm.com)
 *
 *   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 <linux/slab.h>
#include <linux/xattr.h>
#include "cifsfs.h"
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
#include "cifs_debug.h"
#include "cifs_fs_sb.h"
#include "cifs_unicode.h"

#define MAX_EA_VALUE_SIZE 65535
#define CIFS_XATTR_DOS_ATTRIB "user.DosAttrib"
#define CIFS_XATTR_CIFS_ACL "system.cifs_acl"

/* 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
	unsigned int xid;
	struct cifs_sb_info *cifs_sb;
	struct tcon_link *tlink;
	struct cifs_tcon *pTcon;
	struct super_block *sb;
	char *full_path = NULL;

	if (direntry == NULL)
		return -EIO;
	if (d_really_is_negative(direntry))
		return -EIO;
	sb = direntry->d_sb;

	cifs_sb = CIFS_SB(sb);
	tlink = cifs_sb_tlink(cifs_sb);
	if (IS_ERR(tlink))
		return PTR_ERR(tlink);
	pTcon = tlink_tcon(tlink);

	xid = get_xid();

	full_path = build_path_from_dentry(direntry);
	if (full_path == NULL) {
		rc = -ENOMEM;
		goto remove_ea_exit;
	}
	if (ea_name == NULL) {
		cifs_dbg(FYI, "Null xattr names not supported\n");
	} else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
		&& (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN))) {
		cifs_dbg(FYI,
			 "illegal xattr request %s (only user namespace supported)\n",
			 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 += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
		if (pTcon->ses->server->ops->set_EA)
			rc = pTcon->ses->server->ops->set_EA(xid, pTcon,
				full_path, ea_name, NULL, (__u16)0,
				cifs_sb->local_nls, cifs_remap(cifs_sb));
	}
remove_ea_exit:
	kfree(full_path);
	free_xid(xid);
	cifs_put_tlink(tlink);
#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
	unsigned int xid;
	struct cifs_sb_info *cifs_sb;
	struct tcon_link *tlink;
	struct cifs_tcon *pTcon;
	struct super_block *sb;
	char *full_path;

	if (direntry == NULL)
		return -EIO;
	if (d_really_is_negative(direntry))
		return -EIO;
	sb = direntry->d_sb;

	cifs_sb = CIFS_SB(sb);
	tlink = cifs_sb_tlink(cifs_sb);
	if (IS_ERR(tlink))
		return PTR_ERR(tlink);
	pTcon = tlink_tcon(tlink);

	xid = get_xid();

	full_path = build_path_from_dentry(direntry);
	if (full_path == NULL) {
		rc = -ENOMEM;
		goto set_ea_exit;
	}
	/* 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) {
		cifs_dbg(FYI, "size of EA value too large\n");
		rc = -EOPNOTSUPP;
		goto set_ea_exit;
	}

	if (ea_name == NULL) {
		cifs_dbg(FYI, "Null xattr names not supported\n");
	} else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
		   == 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)
			cifs_dbg(FYI, "attempt to set cifs inode metadata\n");

		ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
		if (pTcon->ses->server->ops->set_EA)
			rc = pTcon->ses->server->ops->set_EA(xid, pTcon,
				full_path, ea_name, ea_value, (__u16)value_size,
				cifs_sb->local_nls, cifs_remap(cifs_sb));
	} else if (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN)
		   == 0) {
		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
			goto set_ea_exit;

		ea_name += XATTR_OS2_PREFIX_LEN; /* skip past os2. prefix */
		if (pTcon->ses->server->ops->set_EA)
			rc = pTcon->ses->server->ops->set_EA(xid, pTcon,
				full_path, ea_name, ea_value, (__u16)value_size,
				cifs_sb->local_nls, cifs_remap(cifs_sb));
	} else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL,
			strlen(CIFS_XATTR_CIFS_ACL)) == 0) {
#ifdef CONFIG_CIFS_ACL
		struct cifs_ntsd *pacl;
		pacl = kmalloc(value_size, GFP_KERNEL);
		if (!pacl) {
			rc = -ENOMEM;
		} else {
			memcpy(pacl, ea_value, value_size);
			if (pTcon->ses->server->ops->set_acl)
				rc = pTcon->ses->server->ops->set_acl(pacl,
						value_size, d_inode(direntry),
						full_path, CIFS_ACL_DACL);
			else
				rc = -EOPNOTSUPP;
			if (rc == 0) /* force revalidate of the inode */
				CIFS_I(d_inode(direntry))->time = 0;
			kfree(pacl);
		}
#else
		cifs_dbg(FYI, "Set CIFS ACL not supported yet\n");
#endif /* CONFIG_CIFS_ACL */
	} else {
		int temp;
		temp = strncmp(ea_name, XATTR_NAME_POSIX_ACL_ACCESS,
			strlen(XATTR_NAME_POSIX_ACL_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_remap(cifs_sb));
			cifs_dbg(FYI, "set POSIX ACL rc %d\n", rc);
#else
			cifs_dbg(FYI, "set POSIX ACL not supported\n");
#endif
		} else if (strncmp(ea_name, XATTR_NAME_POSIX_ACL_DEFAULT,
				   strlen(XATTR_NAME_POSIX_ACL_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_remap(cifs_sb));
			cifs_dbg(FYI, "set POSIX default ACL rc %d\n", rc);
#else
			cifs_dbg(FYI, "set default POSIX ACL not supported\n");
#endif
		} else {
			cifs_dbg(FYI, "illegal xattr request %s (only user namespace supported)\n",
				 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);
	free_xid(xid);
	cifs_put_tlink(tlink);
#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
	unsigned int xid;
	struct cifs_sb_info *cifs_sb;
	struct tcon_link *tlink;
	struct cifs_tcon *pTcon;
	struct super_block *sb;
	char *full_path;

	if (direntry == NULL)
		return -EIO;
	if (d_really_is_negative(direntry))
		return -EIO;
	sb = direntry->d_sb;

	cifs_sb = CIFS_SB(sb);
	tlink = cifs_sb_tlink(cifs_sb);
	if (IS_ERR(tlink))
		return PTR_ERR(tlink);
	pTcon = tlink_tcon(tlink);

	xid = get_xid();

	full_path = build_path_from_dentry(direntry);
	if (full_path == NULL) {
		rc = -ENOMEM;
		goto get_ea_exit;
	}
	/* return dos attributes as pseudo xattr */
	/* return alt name if available as pseudo attr */
	if (ea_name == NULL) {
		cifs_dbg(FYI, "Null xattr names not supported\n");
	} else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
		   == 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) {
			cifs_dbg(FYI, "attempt to query cifs inode metadata\n");
			/* revalidate/getattr then populate from inode */
		} /* BB add else when above is implemented */
		ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
		if (pTcon->ses->server->ops->query_all_EAs)
			rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
				full_path, ea_name, ea_value, buf_size,
				cifs_sb->local_nls, cifs_remap(cifs_sb));
	} else if (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) == 0) {
		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
			goto get_ea_exit;

		ea_name += XATTR_OS2_PREFIX_LEN; /* skip past os2. prefix */
		if (pTcon->ses->server->ops->query_all_EAs)
			rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
				full_path, ea_name, ea_value, buf_size,
				cifs_sb->local_nls, cifs_remap(cifs_sb));
	} else if (strncmp(ea_name, XATTR_NAME_POSIX_ACL_ACCESS,
			  strlen(XATTR_NAME_POSIX_ACL_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_remap(cifs_sb));
#else
		cifs_dbg(FYI, "Query POSIX ACL not supported yet\n");
#endif /* CONFIG_CIFS_POSIX */
	} else if (strncmp(ea_name, XATTR_NAME_POSIX_ACL_DEFAULT,
			  strlen(XATTR_NAME_POSIX_ACL_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_remap(cifs_sb));
#else
		cifs_dbg(FYI, "Query POSIX default ACL not supported yet\n");
#endif /* CONFIG_CIFS_POSIX */
	} else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL,
				strlen(CIFS_XATTR_CIFS_ACL)) == 0) {
#ifdef CONFIG_CIFS_ACL
			u32 acllen;
			struct cifs_ntsd *pacl;

			if (pTcon->ses->server->ops->get_acl == NULL)
				goto get_ea_exit; /* rc already EOPNOTSUPP */

			pacl = pTcon->ses->server->ops->get_acl(cifs_sb,
					d_inode(direntry), full_path, &acllen);
			if (IS_ERR(pacl)) {
				rc = PTR_ERR(pacl);
				cifs_dbg(VFS, "%s: error %zd getting sec desc\n",
					 __func__, rc);
			} else {
				if (ea_value) {
					if (acllen > buf_size)
						acllen = -ERANGE;
					else
						memcpy(ea_value, pacl, acllen);
				}
				rc = acllen;
				kfree(pacl);
			}
#else
			cifs_dbg(FYI, "Query CIFS ACL not supported yet\n");
#endif /* CONFIG_CIFS_ACL */
	} else if (strncmp(ea_name,
		  XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) == 0) {
		cifs_dbg(FYI, "Trusted xattr namespace not supported yet\n");
	} else if (strncmp(ea_name,
		  XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) == 0) {
		cifs_dbg(FYI, "Security xattr namespace not supported yet\n");
	} else
		cifs_dbg(FYI,
			 "illegal xattr request %s (only user namespace supported)\n",
			 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);
	free_xid(xid);
	cifs_put_tlink(tlink);
#endif
	return rc;
}

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

	if (direntry == NULL)
		return -EIO;
	if (d_really_is_negative(direntry))
		return -EIO;
	sb = direntry->d_sb;

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

	tlink = cifs_sb_tlink(cifs_sb);
	if (IS_ERR(tlink))
		return PTR_ERR(tlink);
	pTcon = tlink_tcon(tlink);

	xid = get_xid();

	full_path = build_path_from_dentry(direntry);
	if (full_path == NULL) {
		rc = -ENOMEM;
		goto list_ea_exit;
	}
	/* 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 (pTcon->ses->server->ops->query_all_EAs)
		rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
				full_path, NULL, data, buf_size,
				cifs_sb->local_nls, cifs_remap(cifs_sb));
list_ea_exit:
	kfree(full_path);
	free_xid(xid);
	cifs_put_tlink(tlink);
#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 (sfrench@us.ibm.com)
	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>
5a0e3ad6	24	#include <linux/slab.h>
f995e740	25	#include <linux/xattr.h>
1da177e4 LT	26	#include "cifsfs.h"
	27	#include "cifspdu.h"
	28	#include "cifsglob.h"
	29	#include "cifsproto.h"
	30	#include "cifs_debug.h"
2baa2682 SF	31	#include "cifs_fs_sb.h"
2baa2682 SF	32	#include "cifs_unicode.h"
1da177e4 LT	33
	34	#define MAX_EA_VALUE_SIZE 65535
	35	#define CIFS_XATTR_DOS_ATTRIB "user.DosAttrib"
fbeba8bb	36	#define CIFS_XATTR_CIFS_ACL "system.cifs_acl"
1da177e4	37
f995e740	38	/* BB need to add server (Samba e.g) support for security and trusted prefix */
1da177e4	39
79a58d1f	40	int cifs_removexattr(struct dentry direntry, const char ea_name)
1da177e4 LT	41	{
	42	int rc = -EOPNOTSUPP;
	43	#ifdef CONFIG_CIFS_XATTR
6d5786a3	44	unsigned int xid;
1da177e4	45	struct cifs_sb_info *cifs_sb;
7ffec372	46	struct tcon_link *tlink;
96daf2b0	47	struct cifs_tcon *pTcon;
79a58d1f	48	struct super_block *sb;
7ffec372	49	char *full_path = NULL;
79a58d1f SF	50
79a58d1f SF	51	if (direntry == NULL)
1da177e4	52	return -EIO;
2b0143b5	53	if (d_really_is_negative(direntry))
1da177e4	54	return -EIO;
fc64005c	55	sb = direntry->d_sb;
79a58d1f	56
1da177e4	57	cifs_sb = CIFS_SB(sb);
7ffec372 JL	58	tlink = cifs_sb_tlink(cifs_sb);
	59	if (IS_ERR(tlink))
	60	return PTR_ERR(tlink);
	61	pTcon = tlink_tcon(tlink);
	62
6d5786a3	63	xid = get_xid();
79a58d1f	64
1da177e4	65	full_path = build_path_from_dentry(direntry);
79a58d1f	66	if (full_path == NULL) {
0f3bc09e	67	rc = -ENOMEM;
7ffec372	68	goto remove_ea_exit;
1da177e4	69	}
79a58d1f	70	if (ea_name == NULL) {
f96637be	71	cifs_dbg(FYI, "Null xattr names not supported\n");
f995e740 MZ	72	} else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
f995e740 MZ	73	&& (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN))) {
f96637be JP	74	cifs_dbg(FYI,
	75	"illegal xattr request %s (only user namespace supported)\n",
	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
f995e740	84	ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
666753c3 SF	85	if (pTcon->ses->server->ops->set_EA)
	86	rc = pTcon->ses->server->ops->set_EA(xid, pTcon,
	87	full_path, ea_name, NULL, (__u16)0,
2baa2682	88	cifs_sb->local_nls, cifs_remap(cifs_sb));
1da177e4 LT	89	}
1da177e4 LT	90	remove_ea_exit:
f99d49ad	91	kfree(full_path);
6d5786a3	92	free_xid(xid);
7ffec372	93	cifs_put_tlink(tlink);
1da177e4 LT	94	#endif
	95	return rc;
	96	}
	97
79a58d1f SF	98	int cifs_setxattr(struct dentry direntry, const char ea_name,
79a58d1f SF	99	const void *ea_value, size_t value_size, int flags)
1da177e4 LT	100	{
	101	int rc = -EOPNOTSUPP;
	102	#ifdef CONFIG_CIFS_XATTR
6d5786a3	103	unsigned int xid;
1da177e4	104	struct cifs_sb_info *cifs_sb;
7ffec372	105	struct tcon_link *tlink;
96daf2b0	106	struct cifs_tcon *pTcon;
79a58d1f SF	107	struct super_block *sb;
79a58d1f SF	108	char *full_path;
1da177e4	109
79a58d1f	110	if (direntry == NULL)
1da177e4	111	return -EIO;
2b0143b5	112	if (d_really_is_negative(direntry))
1da177e4	113	return -EIO;
fc64005c	114	sb = direntry->d_sb;
1da177e4 LT	115
1da177e4 LT	116	cifs_sb = CIFS_SB(sb);
7ffec372 JL	117	tlink = cifs_sb_tlink(cifs_sb);
	118	if (IS_ERR(tlink))
	119	return PTR_ERR(tlink);
	120	pTcon = tlink_tcon(tlink);
	121
6d5786a3	122	xid = get_xid();
1da177e4	123
1da177e4	124	full_path = build_path_from_dentry(direntry);
79a58d1f	125	if (full_path == NULL) {
0f3bc09e	126	rc = -ENOMEM;
7ffec372	127	goto set_ea_exit;
1da177e4 LT	128	}
	129	/* return dos attributes as pseudo xattr */
	130	/* return alt name if available as pseudo attr */
	131
	132	/* if proc/fs/cifs/streamstoxattr is set then
79a58d1f	133	search server for EAs or streams to
1da177e4	134	returns as xattrs */
79a58d1f	135	if (value_size > MAX_EA_VALUE_SIZE) {
f96637be	136	cifs_dbg(FYI, "size of EA value too large\n");
7ffec372 JL	137	rc = -EOPNOTSUPP;
7ffec372 JL	138	goto set_ea_exit;
1da177e4 LT	139	}
1da177e4 LT	140
79a58d1f	141	if (ea_name == NULL) {
f96637be	142	cifs_dbg(FYI, "Null xattr names not supported\n");
f995e740 MZ	143	} else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
f995e740 MZ	144	== 0) {
79a58d1f	145	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
1da177e4	146	goto set_ea_exit;
ad7a2926	147	if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0)
f96637be	148	cifs_dbg(FYI, "attempt to set cifs inode metadata\n");
ad7a2926	149
f995e740	150	ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
666753c3 SF	151	if (pTcon->ses->server->ops->set_EA)
	152	rc = pTcon->ses->server->ops->set_EA(xid, pTcon,
	153	full_path, ea_name, ea_value, (__u16)value_size,
2baa2682	154	cifs_sb->local_nls, cifs_remap(cifs_sb));
f995e740 MZ	155	} else if (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN)
f995e740 MZ	156	== 0) {
79a58d1f	157	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
1da177e4 LT	158	goto set_ea_exit;
1da177e4 LT	159
f995e740	160	ea_name += XATTR_OS2_PREFIX_LEN; /* skip past os2. prefix */
666753c3 SF	161	if (pTcon->ses->server->ops->set_EA)
	162	rc = pTcon->ses->server->ops->set_EA(xid, pTcon,
	163	full_path, ea_name, ea_value, (__u16)value_size,
2baa2682	164	cifs_sb->local_nls, cifs_remap(cifs_sb));
b73b9a4b SF	165	} else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL,
b73b9a4b SF	166	strlen(CIFS_XATTR_CIFS_ACL)) == 0) {
b0f8ef20 SN	167	#ifdef CONFIG_CIFS_ACL
b0f8ef20 SN	168	struct cifs_ntsd *pacl;
b73b9a4b SF	169	pacl = kmalloc(value_size, GFP_KERNEL);
b73b9a4b SF	170	if (!pacl) {
b73b9a4b SF	171	rc = -ENOMEM;
b73b9a4b SF	172	} else {
b73b9a4b	173	memcpy(pacl, ea_value, value_size);
83e3bc23 SF	174	if (pTcon->ses->server->ops->set_acl)
83e3bc23 SF	175	rc = pTcon->ses->server->ops->set_acl(pacl,
2b0143b5	176	value_size, d_inode(direntry),
83e3bc23 SF	177	full_path, CIFS_ACL_DACL);
	178	else
	179	rc = -EOPNOTSUPP;
b73b9a4b	180	if (rc == 0) /* force revalidate of the inode */
2b0143b5	181	CIFS_I(d_inode(direntry))->time = 0;
b73b9a4b	182	kfree(pacl);
b0f8ef20	183	}
b73b9a4b	184	#else
f96637be	185	cifs_dbg(FYI, "Set CIFS ACL not supported yet\n");
b73b9a4b	186	#endif /* CONFIG_CIFS_ACL */
1da177e4	187	} else {
79a58d1f	188	int temp;
97d79299 AG	189	temp = strncmp(ea_name, XATTR_NAME_POSIX_ACL_ACCESS,
97d79299 AG	190	strlen(XATTR_NAME_POSIX_ACL_ACCESS));
1da177e4 LT	191	if (temp == 0) {
1da177e4 LT	192	#ifdef CONFIG_CIFS_POSIX
79a58d1f SF	193	if (sb->s_flags & MS_POSIXACL)
	194	rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
	195	ea_value, (const int)value_size,
	196	ACL_TYPE_ACCESS, cifs_sb->local_nls,
2baa2682	197	cifs_remap(cifs_sb));
f96637be	198	cifs_dbg(FYI, "set POSIX ACL rc %d\n", rc);
1da177e4	199	#else
f96637be	200	cifs_dbg(FYI, "set POSIX ACL not supported\n");
1da177e4	201	#endif
97d79299 AG	202	} else if (strncmp(ea_name, XATTR_NAME_POSIX_ACL_DEFAULT,
97d79299 AG	203	strlen(XATTR_NAME_POSIX_ACL_DEFAULT)) == 0) {
1da177e4	204	#ifdef CONFIG_CIFS_POSIX
79a58d1f SF	205	if (sb->s_flags & MS_POSIXACL)
	206	rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
	207	ea_value, (const int)value_size,
737b758c	208	ACL_TYPE_DEFAULT, cifs_sb->local_nls,
2baa2682	209	cifs_remap(cifs_sb));
f96637be	210	cifs_dbg(FYI, "set POSIX default ACL rc %d\n", rc);
1da177e4	211	#else
f96637be	212	cifs_dbg(FYI, "set default POSIX ACL not supported\n");
1da177e4 LT	213	#endif
1da177e4 LT	214	} else {
f96637be JP	215	cifs_dbg(FYI, "illegal xattr request %s (only user namespace supported)\n",
f96637be JP	216	ea_name);
1da177e4	217	/* BB what if no namespace prefix? */
79a58d1f	218	/* Should we just pass them to server, except for
1da177e4 LT	219	system and perhaps security prefixes? */
	220	}
	221	}
	222
	223	set_ea_exit:
f99d49ad	224	kfree(full_path);
6d5786a3	225	free_xid(xid);
7ffec372	226	cifs_put_tlink(tlink);
1da177e4 LT	227	#endif
	228	return rc;
	229	}
	230
79a58d1f SF	231	ssize_t cifs_getxattr(struct dentry direntry, const char ea_name,
79a58d1f SF	232	void *ea_value, size_t buf_size)
1da177e4 LT	233	{
	234	ssize_t rc = -EOPNOTSUPP;
	235	#ifdef CONFIG_CIFS_XATTR
6d5786a3	236	unsigned int xid;
1da177e4	237	struct cifs_sb_info *cifs_sb;
7ffec372	238	struct tcon_link *tlink;
96daf2b0	239	struct cifs_tcon *pTcon;
79a58d1f SF	240	struct super_block *sb;
79a58d1f SF	241	char *full_path;
1da177e4	242
79a58d1f	243	if (direntry == NULL)
1da177e4	244	return -EIO;
2b0143b5	245	if (d_really_is_negative(direntry))
1da177e4	246	return -EIO;
fc64005c	247	sb = direntry->d_sb;
1da177e4	248
1da177e4	249	cifs_sb = CIFS_SB(sb);
7ffec372 JL	250	tlink = cifs_sb_tlink(cifs_sb);
	251	if (IS_ERR(tlink))
	252	return PTR_ERR(tlink);
	253	pTcon = tlink_tcon(tlink);
	254
6d5786a3	255	xid = get_xid();
1da177e4	256
1da177e4	257	full_path = build_path_from_dentry(direntry);
79a58d1f	258	if (full_path == NULL) {
0f3bc09e	259	rc = -ENOMEM;
7ffec372	260	goto get_ea_exit;
1da177e4 LT	261	}
	262	/* return dos attributes as pseudo xattr */
	263	/* return alt name if available as pseudo attr */
79a58d1f	264	if (ea_name == NULL) {
f96637be	265	cifs_dbg(FYI, "Null xattr names not supported\n");
f995e740 MZ	266	} else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
f995e740 MZ	267	== 0) {
79a58d1f	268	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
1da177e4 LT	269	goto get_ea_exit;
1da177e4 LT	270
79a58d1f	271	if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0) {
f96637be	272	cifs_dbg(FYI, "attempt to query cifs inode metadata\n");
1da177e4 LT	273	/* revalidate/getattr then populate from inode */
1da177e4 LT	274	} /* BB add else when above is implemented */
f995e740	275	ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
666753c3 SF	276	if (pTcon->ses->server->ops->query_all_EAs)
	277	rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
	278	full_path, ea_name, ea_value, buf_size,
2baa2682	279	cifs_sb->local_nls, cifs_remap(cifs_sb));
f995e740	280	} else if (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) == 0) {
79a58d1f	281	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
1da177e4 LT	282	goto get_ea_exit;
1da177e4 LT	283
f995e740	284	ea_name += XATTR_OS2_PREFIX_LEN; /* skip past os2. prefix */
666753c3 SF	285	if (pTcon->ses->server->ops->query_all_EAs)
	286	rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
	287	full_path, ea_name, ea_value, buf_size,
2baa2682	288	cifs_sb->local_nls, cifs_remap(cifs_sb));
97d79299 AG	289	} else if (strncmp(ea_name, XATTR_NAME_POSIX_ACL_ACCESS,
97d79299 AG	290	strlen(XATTR_NAME_POSIX_ACL_ACCESS)) == 0) {
1da177e4	291	#ifdef CONFIG_CIFS_POSIX
79a58d1f	292	if (sb->s_flags & MS_POSIXACL)
1da0c78b	293	rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
79a58d1f	294	ea_value, buf_size, ACL_TYPE_ACCESS,
737b758c	295	cifs_sb->local_nls,
2baa2682	296	cifs_remap(cifs_sb));
79a58d1f	297	#else
f96637be	298	cifs_dbg(FYI, "Query POSIX ACL not supported yet\n");
1da177e4	299	#endif /* CONFIG_CIFS_POSIX */
97d79299 AG	300	} else if (strncmp(ea_name, XATTR_NAME_POSIX_ACL_DEFAULT,
97d79299 AG	301	strlen(XATTR_NAME_POSIX_ACL_DEFAULT)) == 0) {
1da177e4	302	#ifdef CONFIG_CIFS_POSIX
79a58d1f	303	if (sb->s_flags & MS_POSIXACL)
1da0c78b	304	rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
79a58d1f	305	ea_value, buf_size, ACL_TYPE_DEFAULT,
737b758c	306	cifs_sb->local_nls,
2baa2682	307	cifs_remap(cifs_sb));
79a58d1f	308	#else
f96637be	309	cifs_dbg(FYI, "Query POSIX default ACL not supported yet\n");
fbeba8bb SP	310	#endif /* CONFIG_CIFS_POSIX */
	311	} else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL,
	312	strlen(CIFS_XATTR_CIFS_ACL)) == 0) {
	313	#ifdef CONFIG_CIFS_ACL
	314	u32 acllen;
	315	struct cifs_ntsd *pacl;
	316
83e3bc23 SF	317	if (pTcon->ses->server->ops->get_acl == NULL)
	318	goto get_ea_exit; /* rc already EOPNOTSUPP */
	319
	320	pacl = pTcon->ses->server->ops->get_acl(cifs_sb,
2b0143b5	321	d_inode(direntry), full_path, &acllen);
fbeba8bb SP	322	if (IS_ERR(pacl)) {
fbeba8bb SP	323	rc = PTR_ERR(pacl);
f96637be JP	324	cifs_dbg(VFS, "%s: error %zd getting sec desc\n",
f96637be JP	325	__func__, rc);
fbeba8bb SP	326	} else {
	327	if (ea_value) {
	328	if (acllen > buf_size)
	329	acllen = -ERANGE;
	330	else
	331	memcpy(ea_value, pacl, acllen);
	332	}
	333	rc = acllen;
	334	kfree(pacl);
	335	}
	336	#else
f96637be	337	cifs_dbg(FYI, "Query CIFS ACL not supported yet\n");
fbeba8bb	338	#endif /* CONFIG_CIFS_ACL */
79a58d1f	339	} else if (strncmp(ea_name,
f995e740	340	XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) == 0) {
f96637be	341	cifs_dbg(FYI, "Trusted xattr namespace not supported yet\n");
79a58d1f	342	} else if (strncmp(ea_name,
f995e740	343	XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) == 0) {
f96637be	344	cifs_dbg(FYI, "Security xattr namespace not supported yet\n");
ad7a2926	345	} else
f96637be JP	346	cifs_dbg(FYI,
	347	"illegal xattr request %s (only user namespace supported)\n",
	348	ea_name);
1da177e4	349
79a58d1f	350	/* We could add an additional check for streams ie
1da177e4	351	if proc/fs/cifs/streamstoxattr is set then
79a58d1f	352	search server for EAs or streams to
1da177e4 LT	353	returns as xattrs */
1da177e4 LT	354
79a58d1f SF	355	if (rc == -EINVAL)
79a58d1f SF	356	rc = -EOPNOTSUPP;
1da177e4 LT	357
1da177e4 LT	358	get_ea_exit:
f99d49ad	359	kfree(full_path);
6d5786a3	360	free_xid(xid);
7ffec372	361	cifs_put_tlink(tlink);
1da177e4 LT	362	#endif
	363	return rc;
	364	}
	365
79a58d1f	366	ssize_t cifs_listxattr(struct dentry direntry, char data, size_t buf_size)
1da177e4 LT	367	{
	368	ssize_t rc = -EOPNOTSUPP;
	369	#ifdef CONFIG_CIFS_XATTR
6d5786a3	370	unsigned int xid;
1da177e4	371	struct cifs_sb_info *cifs_sb;
7ffec372	372	struct tcon_link *tlink;
96daf2b0	373	struct cifs_tcon *pTcon;
79a58d1f SF	374	struct super_block *sb;
79a58d1f SF	375	char *full_path;
1da177e4	376
79a58d1f	377	if (direntry == NULL)
1da177e4	378	return -EIO;
2b0143b5	379	if (d_really_is_negative(direntry))
1da177e4	380	return -EIO;
fc64005c	381	sb = direntry->d_sb;
1da177e4 LT	382
1da177e4 LT	383	cifs_sb = CIFS_SB(sb);
79a58d1f	384	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
ea4c07d7 SF	385	return -EOPNOTSUPP;
ea4c07d7 SF	386
7ffec372 JL	387	tlink = cifs_sb_tlink(cifs_sb);
	388	if (IS_ERR(tlink))
	389	return PTR_ERR(tlink);
	390	pTcon = tlink_tcon(tlink);
	391
6d5786a3	392	xid = get_xid();
ea4c07d7	393
1da177e4	394	full_path = build_path_from_dentry(direntry);
79a58d1f	395	if (full_path == NULL) {
0f3bc09e	396	rc = -ENOMEM;
7ffec372	397	goto list_ea_exit;
1da177e4 LT	398	}
	399	/* return dos attributes as pseudo xattr */
	400	/* return alt name if available as pseudo attr */
	401
	402	/* if proc/fs/cifs/streamstoxattr is set then
79a58d1f	403	search server for EAs or streams to
1da177e4	404	returns as xattrs */
1da177e4	405
666753c3 SF	406	if (pTcon->ses->server->ops->query_all_EAs)
	407	rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
	408	full_path, NULL, data, buf_size,
2baa2682	409	cifs_sb->local_nls, cifs_remap(cifs_sb));
7ffec372	410	list_ea_exit:
f99d49ad	411	kfree(full_path);
6d5786a3	412	free_xid(xid);
7ffec372	413	cifs_put_tlink(tlink);
1da177e4 LT	414	#endif
	415	return rc;
	416	}