[linux-2.6-block.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 = d_inode(direntry)->i_sb;
	if (sb == NULL)
		return -EIO;

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

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

	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, 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_remap(cifs_sb));
#else
		cifs_dbg(FYI, "Query POSIX ACL not supported yet\n");
#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_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 = d_inode(direntry)->i_sb;
	if (sb == NULL)
		return -EIO;

	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;
2b0143b5	55	sb = d_inode(direntry)->i_sb;
79a58d1f	56	if (sb == NULL)
1da177e4	57	return -EIO;
79a58d1f	58
1da177e4	59	cifs_sb = CIFS_SB(sb);
7ffec372 JL	60	tlink = cifs_sb_tlink(cifs_sb);
	61	if (IS_ERR(tlink))
	62	return PTR_ERR(tlink);
	63	pTcon = tlink_tcon(tlink);
	64
6d5786a3	65	xid = get_xid();
79a58d1f	66
1da177e4	67	full_path = build_path_from_dentry(direntry);
79a58d1f	68	if (full_path == NULL) {
0f3bc09e	69	rc = -ENOMEM;
7ffec372	70	goto remove_ea_exit;
1da177e4	71	}
79a58d1f	72	if (ea_name == NULL) {
f96637be	73	cifs_dbg(FYI, "Null xattr names not supported\n");
f995e740 MZ	74	} else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
f995e740 MZ	75	&& (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN))) {
f96637be JP	76	cifs_dbg(FYI,
	77	"illegal xattr request %s (only user namespace supported)\n",
	78	ea_name);
1da177e4 LT	79	/* BB what if no namespace prefix? */
	80	/* Should we just pass them to server, except for
	81	system and perhaps security prefixes? */
	82	} else {
79a58d1f	83	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
1da177e4 LT	84	goto remove_ea_exit;
1da177e4 LT	85
f995e740	86	ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
666753c3 SF	87	if (pTcon->ses->server->ops->set_EA)
	88	rc = pTcon->ses->server->ops->set_EA(xid, pTcon,
	89	full_path, ea_name, NULL, (__u16)0,
2baa2682	90	cifs_sb->local_nls, cifs_remap(cifs_sb));
1da177e4 LT	91	}
1da177e4 LT	92	remove_ea_exit:
f99d49ad	93	kfree(full_path);
6d5786a3	94	free_xid(xid);
7ffec372	95	cifs_put_tlink(tlink);
1da177e4 LT	96	#endif
	97	return rc;
	98	}
	99
79a58d1f SF	100	int cifs_setxattr(struct dentry direntry, const char ea_name,
79a58d1f SF	101	const void *ea_value, size_t value_size, int flags)
1da177e4 LT	102	{
	103	int rc = -EOPNOTSUPP;
	104	#ifdef CONFIG_CIFS_XATTR
6d5786a3	105	unsigned int xid;
1da177e4	106	struct cifs_sb_info *cifs_sb;
7ffec372	107	struct tcon_link *tlink;
96daf2b0	108	struct cifs_tcon *pTcon;
79a58d1f SF	109	struct super_block *sb;
79a58d1f SF	110	char *full_path;
1da177e4	111
79a58d1f	112	if (direntry == NULL)
1da177e4	113	return -EIO;
2b0143b5	114	if (d_really_is_negative(direntry))
1da177e4	115	return -EIO;
2b0143b5	116	sb = d_inode(direntry)->i_sb;
79a58d1f	117	if (sb == NULL)
1da177e4	118	return -EIO;
1da177e4 LT	119
1da177e4 LT	120	cifs_sb = CIFS_SB(sb);
7ffec372 JL	121	tlink = cifs_sb_tlink(cifs_sb);
	122	if (IS_ERR(tlink))
	123	return PTR_ERR(tlink);
	124	pTcon = tlink_tcon(tlink);
	125
6d5786a3	126	xid = get_xid();
1da177e4	127
1da177e4	128	full_path = build_path_from_dentry(direntry);
79a58d1f	129	if (full_path == NULL) {
0f3bc09e	130	rc = -ENOMEM;
7ffec372	131	goto set_ea_exit;
1da177e4 LT	132	}
	133	/* return dos attributes as pseudo xattr */
	134	/* return alt name if available as pseudo attr */
	135
	136	/* if proc/fs/cifs/streamstoxattr is set then
79a58d1f	137	search server for EAs or streams to
1da177e4	138	returns as xattrs */
79a58d1f	139	if (value_size > MAX_EA_VALUE_SIZE) {
f96637be	140	cifs_dbg(FYI, "size of EA value too large\n");
7ffec372 JL	141	rc = -EOPNOTSUPP;
7ffec372 JL	142	goto set_ea_exit;
1da177e4 LT	143	}
1da177e4 LT	144
79a58d1f	145	if (ea_name == NULL) {
f96637be	146	cifs_dbg(FYI, "Null xattr names not supported\n");
f995e740 MZ	147	} else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
f995e740 MZ	148	== 0) {
79a58d1f	149	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
1da177e4	150	goto set_ea_exit;
ad7a2926	151	if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0)
f96637be	152	cifs_dbg(FYI, "attempt to set cifs inode metadata\n");
ad7a2926	153
f995e740	154	ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
666753c3 SF	155	if (pTcon->ses->server->ops->set_EA)
	156	rc = pTcon->ses->server->ops->set_EA(xid, pTcon,
	157	full_path, ea_name, ea_value, (__u16)value_size,
2baa2682	158	cifs_sb->local_nls, cifs_remap(cifs_sb));
f995e740 MZ	159	} else if (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN)
f995e740 MZ	160	== 0) {
79a58d1f	161	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
1da177e4 LT	162	goto set_ea_exit;
1da177e4 LT	163
f995e740	164	ea_name += XATTR_OS2_PREFIX_LEN; /* skip past os2. prefix */
666753c3 SF	165	if (pTcon->ses->server->ops->set_EA)
	166	rc = pTcon->ses->server->ops->set_EA(xid, pTcon,
	167	full_path, ea_name, ea_value, (__u16)value_size,
2baa2682	168	cifs_sb->local_nls, cifs_remap(cifs_sb));
b73b9a4b SF	169	} else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL,
b73b9a4b SF	170	strlen(CIFS_XATTR_CIFS_ACL)) == 0) {
b0f8ef20 SN	171	#ifdef CONFIG_CIFS_ACL
b0f8ef20 SN	172	struct cifs_ntsd *pacl;
b73b9a4b SF	173	pacl = kmalloc(value_size, GFP_KERNEL);
b73b9a4b SF	174	if (!pacl) {
b73b9a4b SF	175	rc = -ENOMEM;
b73b9a4b SF	176	} else {
b73b9a4b	177	memcpy(pacl, ea_value, value_size);
83e3bc23 SF	178	if (pTcon->ses->server->ops->set_acl)
83e3bc23 SF	179	rc = pTcon->ses->server->ops->set_acl(pacl,
2b0143b5	180	value_size, d_inode(direntry),
83e3bc23 SF	181	full_path, CIFS_ACL_DACL);
	182	else
	183	rc = -EOPNOTSUPP;
b73b9a4b	184	if (rc == 0) /* force revalidate of the inode */
2b0143b5	185	CIFS_I(d_inode(direntry))->time = 0;
b73b9a4b	186	kfree(pacl);
b0f8ef20	187	}
b73b9a4b	188	#else
f96637be	189	cifs_dbg(FYI, "Set CIFS ACL not supported yet\n");
b73b9a4b	190	#endif /* CONFIG_CIFS_ACL */
1da177e4	191	} else {
79a58d1f SF	192	int temp;
79a58d1f SF	193	temp = strncmp(ea_name, POSIX_ACL_XATTR_ACCESS,
1da177e4 LT	194	strlen(POSIX_ACL_XATTR_ACCESS));
	195	if (temp == 0) {
	196	#ifdef CONFIG_CIFS_POSIX
79a58d1f SF	197	if (sb->s_flags & MS_POSIXACL)
	198	rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
	199	ea_value, (const int)value_size,
	200	ACL_TYPE_ACCESS, cifs_sb->local_nls,
2baa2682	201	cifs_remap(cifs_sb));
f96637be	202	cifs_dbg(FYI, "set POSIX ACL rc %d\n", rc);
1da177e4	203	#else
f96637be	204	cifs_dbg(FYI, "set POSIX ACL not supported\n");
1da177e4	205	#endif
79a58d1f SF	206	} else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT,
79a58d1f SF	207	strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
1da177e4	208	#ifdef CONFIG_CIFS_POSIX
79a58d1f SF	209	if (sb->s_flags & MS_POSIXACL)
	210	rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
	211	ea_value, (const int)value_size,
737b758c	212	ACL_TYPE_DEFAULT, cifs_sb->local_nls,
2baa2682	213	cifs_remap(cifs_sb));
f96637be	214	cifs_dbg(FYI, "set POSIX default ACL rc %d\n", rc);
1da177e4	215	#else
f96637be	216	cifs_dbg(FYI, "set default POSIX ACL not supported\n");
1da177e4 LT	217	#endif
1da177e4 LT	218	} else {
f96637be JP	219	cifs_dbg(FYI, "illegal xattr request %s (only user namespace supported)\n",
f96637be JP	220	ea_name);
1da177e4	221	/* BB what if no namespace prefix? */
79a58d1f	222	/* Should we just pass them to server, except for
1da177e4 LT	223	system and perhaps security prefixes? */
	224	}
	225	}
	226
	227	set_ea_exit:
f99d49ad	228	kfree(full_path);
6d5786a3	229	free_xid(xid);
7ffec372	230	cifs_put_tlink(tlink);
1da177e4 LT	231	#endif
	232	return rc;
	233	}
	234
79a58d1f SF	235	ssize_t cifs_getxattr(struct dentry direntry, const char ea_name,
79a58d1f SF	236	void *ea_value, size_t buf_size)
1da177e4 LT	237	{
	238	ssize_t rc = -EOPNOTSUPP;
	239	#ifdef CONFIG_CIFS_XATTR
6d5786a3	240	unsigned int xid;
1da177e4	241	struct cifs_sb_info *cifs_sb;
7ffec372	242	struct tcon_link *tlink;
96daf2b0	243	struct cifs_tcon *pTcon;
79a58d1f SF	244	struct super_block *sb;
79a58d1f SF	245	char *full_path;
1da177e4	246
79a58d1f	247	if (direntry == NULL)
1da177e4	248	return -EIO;
2b0143b5	249	if (d_really_is_negative(direntry))
1da177e4	250	return -EIO;
2b0143b5	251	sb = d_inode(direntry)->i_sb;
79a58d1f	252	if (sb == NULL)
1da177e4 LT	253	return -EIO;
1da177e4 LT	254
1da177e4	255	cifs_sb = CIFS_SB(sb);
7ffec372 JL	256	tlink = cifs_sb_tlink(cifs_sb);
	257	if (IS_ERR(tlink))
	258	return PTR_ERR(tlink);
	259	pTcon = tlink_tcon(tlink);
	260
6d5786a3	261	xid = get_xid();
1da177e4	262
1da177e4	263	full_path = build_path_from_dentry(direntry);
79a58d1f	264	if (full_path == NULL) {
0f3bc09e	265	rc = -ENOMEM;
7ffec372	266	goto get_ea_exit;
1da177e4 LT	267	}
	268	/* return dos attributes as pseudo xattr */
	269	/* return alt name if available as pseudo attr */
79a58d1f	270	if (ea_name == NULL) {
f96637be	271	cifs_dbg(FYI, "Null xattr names not supported\n");
f995e740 MZ	272	} else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
f995e740 MZ	273	== 0) {
79a58d1f	274	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
1da177e4 LT	275	goto get_ea_exit;
1da177e4 LT	276
79a58d1f	277	if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0) {
f96637be	278	cifs_dbg(FYI, "attempt to query cifs inode metadata\n");
1da177e4 LT	279	/* revalidate/getattr then populate from inode */
1da177e4 LT	280	} /* BB add else when above is implemented */
f995e740	281	ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
666753c3 SF	282	if (pTcon->ses->server->ops->query_all_EAs)
	283	rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
	284	full_path, ea_name, ea_value, buf_size,
2baa2682	285	cifs_sb->local_nls, cifs_remap(cifs_sb));
f995e740	286	} else if (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) == 0) {
79a58d1f	287	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
1da177e4 LT	288	goto get_ea_exit;
1da177e4 LT	289
f995e740	290	ea_name += XATTR_OS2_PREFIX_LEN; /* skip past os2. prefix */
666753c3 SF	291	if (pTcon->ses->server->ops->query_all_EAs)
	292	rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
	293	full_path, ea_name, ea_value, buf_size,
2baa2682	294	cifs_sb->local_nls, cifs_remap(cifs_sb));
79a58d1f	295	} else if (strncmp(ea_name, POSIX_ACL_XATTR_ACCESS,
0a4b92c0	296	strlen(POSIX_ACL_XATTR_ACCESS)) == 0) {
1da177e4	297	#ifdef CONFIG_CIFS_POSIX
79a58d1f	298	if (sb->s_flags & MS_POSIXACL)
1da0c78b	299	rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
79a58d1f	300	ea_value, buf_size, ACL_TYPE_ACCESS,
737b758c	301	cifs_sb->local_nls,
2baa2682	302	cifs_remap(cifs_sb));
79a58d1f	303	#else
f96637be	304	cifs_dbg(FYI, "Query POSIX ACL not supported yet\n");
1da177e4	305	#endif /* CONFIG_CIFS_POSIX */
79a58d1f	306	} else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT,
0a4b92c0	307	strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
1da177e4	308	#ifdef CONFIG_CIFS_POSIX
79a58d1f	309	if (sb->s_flags & MS_POSIXACL)
1da0c78b	310	rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
79a58d1f	311	ea_value, buf_size, ACL_TYPE_DEFAULT,
737b758c	312	cifs_sb->local_nls,
2baa2682	313	cifs_remap(cifs_sb));
79a58d1f	314	#else
f96637be	315	cifs_dbg(FYI, "Query POSIX default ACL not supported yet\n");
fbeba8bb SP	316	#endif /* CONFIG_CIFS_POSIX */
	317	} else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL,
	318	strlen(CIFS_XATTR_CIFS_ACL)) == 0) {
	319	#ifdef CONFIG_CIFS_ACL
	320	u32 acllen;
	321	struct cifs_ntsd *pacl;
	322
83e3bc23 SF	323	if (pTcon->ses->server->ops->get_acl == NULL)
	324	goto get_ea_exit; /* rc already EOPNOTSUPP */
	325
	326	pacl = pTcon->ses->server->ops->get_acl(cifs_sb,
2b0143b5	327	d_inode(direntry), full_path, &acllen);
fbeba8bb SP	328	if (IS_ERR(pacl)) {
fbeba8bb SP	329	rc = PTR_ERR(pacl);
f96637be JP	330	cifs_dbg(VFS, "%s: error %zd getting sec desc\n",
f96637be JP	331	__func__, rc);
fbeba8bb SP	332	} else {
	333	if (ea_value) {
	334	if (acllen > buf_size)
	335	acllen = -ERANGE;
	336	else
	337	memcpy(ea_value, pacl, acllen);
	338	}
	339	rc = acllen;
	340	kfree(pacl);
	341	}
	342	#else
f96637be	343	cifs_dbg(FYI, "Query CIFS ACL not supported yet\n");
fbeba8bb	344	#endif /* CONFIG_CIFS_ACL */
79a58d1f	345	} else if (strncmp(ea_name,
f995e740	346	XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) == 0) {
f96637be	347	cifs_dbg(FYI, "Trusted xattr namespace not supported yet\n");
79a58d1f	348	} else if (strncmp(ea_name,
f995e740	349	XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) == 0) {
f96637be	350	cifs_dbg(FYI, "Security xattr namespace not supported yet\n");
ad7a2926	351	} else
f96637be JP	352	cifs_dbg(FYI,
	353	"illegal xattr request %s (only user namespace supported)\n",
	354	ea_name);
1da177e4	355
79a58d1f	356	/* We could add an additional check for streams ie
1da177e4	357	if proc/fs/cifs/streamstoxattr is set then
79a58d1f	358	search server for EAs or streams to
1da177e4 LT	359	returns as xattrs */
1da177e4 LT	360
79a58d1f SF	361	if (rc == -EINVAL)
79a58d1f SF	362	rc = -EOPNOTSUPP;
1da177e4 LT	363
1da177e4 LT	364	get_ea_exit:
f99d49ad	365	kfree(full_path);
6d5786a3	366	free_xid(xid);
7ffec372	367	cifs_put_tlink(tlink);
1da177e4 LT	368	#endif
	369	return rc;
	370	}
	371
79a58d1f	372	ssize_t cifs_listxattr(struct dentry direntry, char data, size_t buf_size)
1da177e4 LT	373	{
	374	ssize_t rc = -EOPNOTSUPP;
	375	#ifdef CONFIG_CIFS_XATTR
6d5786a3	376	unsigned int xid;
1da177e4	377	struct cifs_sb_info *cifs_sb;
7ffec372	378	struct tcon_link *tlink;
96daf2b0	379	struct cifs_tcon *pTcon;
79a58d1f SF	380	struct super_block *sb;
79a58d1f SF	381	char *full_path;
1da177e4	382
79a58d1f	383	if (direntry == NULL)
1da177e4	384	return -EIO;
2b0143b5	385	if (d_really_is_negative(direntry))
1da177e4	386	return -EIO;
2b0143b5	387	sb = d_inode(direntry)->i_sb;
79a58d1f	388	if (sb == NULL)
1da177e4	389	return -EIO;
1da177e4 LT	390
1da177e4 LT	391	cifs_sb = CIFS_SB(sb);
79a58d1f	392	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
ea4c07d7 SF	393	return -EOPNOTSUPP;
ea4c07d7 SF	394
7ffec372 JL	395	tlink = cifs_sb_tlink(cifs_sb);
	396	if (IS_ERR(tlink))
	397	return PTR_ERR(tlink);
	398	pTcon = tlink_tcon(tlink);
	399
6d5786a3	400	xid = get_xid();
ea4c07d7	401
1da177e4	402	full_path = build_path_from_dentry(direntry);
79a58d1f	403	if (full_path == NULL) {
0f3bc09e	404	rc = -ENOMEM;
7ffec372	405	goto list_ea_exit;
1da177e4 LT	406	}
	407	/* return dos attributes as pseudo xattr */
	408	/* return alt name if available as pseudo attr */
	409
	410	/* if proc/fs/cifs/streamstoxattr is set then
79a58d1f	411	search server for EAs or streams to
1da177e4	412	returns as xattrs */
1da177e4	413
666753c3 SF	414	if (pTcon->ses->server->ops->query_all_EAs)
	415	rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
	416	full_path, NULL, data, buf_size,
2baa2682	417	cifs_sb->local_nls, cifs_remap(cifs_sb));
7ffec372	418	list_ea_exit:
f99d49ad	419	kfree(full_path);
6d5786a3	420	free_xid(xid);
7ffec372	421	cifs_put_tlink(tlink);
1da177e4 LT	422	#endif
	423	return rc;
	424	}