225 lines
6.5 KiB
C
225 lines
6.5 KiB
C
/*
|
|
* CDDL HEADER START
|
|
*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License (the "License").
|
|
* You may not use this file except in compliance with the License.
|
|
*
|
|
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
|
|
* or http://www.opensolaris.org/os/licensing.
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
*
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
|
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
|
* If applicable, add the following below this CDDL HEADER, with the
|
|
* fields enclosed by brackets "[]" replaced with your own identifying
|
|
* information: Portions Copyright [yyyy] [name of copyright owner]
|
|
*
|
|
* CDDL HEADER END
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2011 Lawrence Livermore National Security, LLC.
|
|
*/
|
|
|
|
#ifndef _ZFS_XATTR_H
|
|
#define _ZFS_XATTR_H
|
|
|
|
#include <linux/posix_acl_xattr.h>
|
|
|
|
/*
|
|
* 2.6.35 API change,
|
|
* The const keyword was added to the 'struct xattr_handler' in the
|
|
* generic Linux super_block structure. To handle this we define an
|
|
* appropriate xattr_handler_t typedef which can be used. This was
|
|
* the preferred solution because it keeps the code clean and readable.
|
|
*/
|
|
#ifdef HAVE_CONST_XATTR_HANDLER
|
|
typedef const struct xattr_handler xattr_handler_t;
|
|
#else
|
|
typedef struct xattr_handler xattr_handler_t;
|
|
#endif
|
|
|
|
/*
|
|
* 3.7 API change,
|
|
* Preferred XATTR_NAME_* definitions introduced, these are mapped to
|
|
* the previous definitions for older kernels.
|
|
*/
|
|
#ifndef XATTR_NAME_POSIX_ACL_DEFAULT
|
|
#define XATTR_NAME_POSIX_ACL_DEFAULT POSIX_ACL_XATTR_DEFAULT
|
|
#endif
|
|
|
|
#ifndef XATTR_NAME_POSIX_ACL_ACCESS
|
|
#define XATTR_NAME_POSIX_ACL_ACCESS POSIX_ACL_XATTR_ACCESS
|
|
#endif
|
|
|
|
/*
|
|
* 4.5 API change,
|
|
*/
|
|
#if defined(HAVE_XATTR_LIST_SIMPLE)
|
|
#define ZPL_XATTR_LIST_WRAPPER(fn) \
|
|
static bool \
|
|
fn(struct dentry *dentry) \
|
|
{ \
|
|
return (!!__ ## fn(dentry->d_inode, NULL, 0, NULL, 0)); \
|
|
}
|
|
/*
|
|
* 4.4 API change,
|
|
*/
|
|
#elif defined(HAVE_XATTR_LIST_DENTRY)
|
|
#define ZPL_XATTR_LIST_WRAPPER(fn) \
|
|
static size_t \
|
|
fn(struct dentry *dentry, char *list, size_t list_size, \
|
|
const char *name, size_t name_len, int type) \
|
|
{ \
|
|
return (__ ## fn(dentry->d_inode, \
|
|
list, list_size, name, name_len)); \
|
|
}
|
|
/*
|
|
* 2.6.33 API change,
|
|
*/
|
|
#elif defined(HAVE_XATTR_LIST_HANDLER)
|
|
#define ZPL_XATTR_LIST_WRAPPER(fn) \
|
|
static size_t \
|
|
fn(const struct xattr_handler *handler, struct dentry *dentry, \
|
|
char *list, size_t list_size, const char *name, size_t name_len) \
|
|
{ \
|
|
return (__ ## fn(dentry->d_inode, \
|
|
list, list_size, name, name_len)); \
|
|
}
|
|
/*
|
|
* 2.6.32 API
|
|
*/
|
|
#elif defined(HAVE_XATTR_LIST_INODE)
|
|
#define ZPL_XATTR_LIST_WRAPPER(fn) \
|
|
static size_t \
|
|
fn(struct inode *ip, char *list, size_t list_size, \
|
|
const char *name, size_t name_len) \
|
|
{ \
|
|
return (__ ## fn(ip, list, list_size, name, name_len)); \
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* 4.4 API change,
|
|
* The xattr_handler->get() callback was changed to take a xattr_handler,
|
|
* and handler_flags argument was removed and should be accessed by
|
|
* handler->flags.
|
|
*/
|
|
#if defined(HAVE_XATTR_GET_HANDLER)
|
|
#define ZPL_XATTR_GET_WRAPPER(fn) \
|
|
static int \
|
|
fn(const struct xattr_handler *handler, struct dentry *dentry, \
|
|
const char *name, void *buffer, size_t size) \
|
|
{ \
|
|
return (__ ## fn(dentry->d_inode, name, buffer, size)); \
|
|
}
|
|
/*
|
|
* 2.6.33 API change,
|
|
* The xattr_handler->get() callback was changed to take a dentry
|
|
* instead of an inode, and a handler_flags argument was added.
|
|
*/
|
|
#elif defined(HAVE_XATTR_GET_DENTRY)
|
|
#define ZPL_XATTR_GET_WRAPPER(fn) \
|
|
static int \
|
|
fn(struct dentry *dentry, const char *name, void *buffer, size_t size, \
|
|
int unused_handler_flags) \
|
|
{ \
|
|
return (__ ## fn(dentry->d_inode, name, buffer, size)); \
|
|
}
|
|
/*
|
|
* 2.6.32 API
|
|
*/
|
|
#elif defined(HAVE_XATTR_GET_INODE)
|
|
#define ZPL_XATTR_GET_WRAPPER(fn) \
|
|
static int \
|
|
fn(struct inode *ip, const char *name, void *buffer, size_t size) \
|
|
{ \
|
|
return (__ ## fn(ip, name, buffer, size)); \
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* 4.4 API change,
|
|
* The xattr_handler->set() callback was changed to take a xattr_handler,
|
|
* and handler_flags argument was removed and should be accessed by
|
|
* handler->flags.
|
|
*/
|
|
#if defined(HAVE_XATTR_SET_HANDLER)
|
|
#define ZPL_XATTR_SET_WRAPPER(fn) \
|
|
static int \
|
|
fn(const struct xattr_handler *handler, struct dentry *dentry, \
|
|
const char *name, const void *buffer, size_t size, int flags) \
|
|
{ \
|
|
return (__ ## fn(dentry->d_inode, name, buffer, size, flags)); \
|
|
}
|
|
/*
|
|
* 2.6.33 API change,
|
|
* The xattr_handler->set() callback was changed to take a dentry
|
|
* instead of an inode, and a handler_flags argument was added.
|
|
*/
|
|
#elif defined(HAVE_XATTR_SET_DENTRY)
|
|
#define ZPL_XATTR_SET_WRAPPER(fn) \
|
|
static int \
|
|
fn(struct dentry *dentry, const char *name, const void *buffer, \
|
|
size_t size, int flags, int unused_handler_flags) \
|
|
{ \
|
|
return (__ ## fn(dentry->d_inode, name, buffer, size, flags)); \
|
|
}
|
|
/*
|
|
* 2.6.32 API
|
|
*/
|
|
#elif defined(HAVE_XATTR_SET_INODE)
|
|
#define ZPL_XATTR_SET_WRAPPER(fn) \
|
|
static int \
|
|
fn(struct inode *ip, const char *name, const void *buffer, \
|
|
size_t size, int flags) \
|
|
{ \
|
|
return (__ ## fn(ip, name, buffer, size, flags)); \
|
|
}
|
|
#endif
|
|
|
|
#ifdef HAVE_6ARGS_SECURITY_INODE_INIT_SECURITY
|
|
#define zpl_security_inode_init_security(ip, dip, qstr, nm, val, len) \
|
|
security_inode_init_security(ip, dip, qstr, nm, val, len)
|
|
#else
|
|
#define zpl_security_inode_init_security(ip, dip, qstr, nm, val, len) \
|
|
security_inode_init_security(ip, dip, nm, val, len)
|
|
#endif /* HAVE_6ARGS_SECURITY_INODE_INIT_SECURITY */
|
|
|
|
/*
|
|
* Linux 3.7 API change. posix_acl_{from,to}_xattr gained the user_ns
|
|
* parameter. All callers are expected to pass the &init_user_ns which
|
|
* is available through the init credential (kcred).
|
|
*/
|
|
#ifdef HAVE_POSIX_ACL_FROM_XATTR_USERNS
|
|
static inline struct posix_acl *
|
|
zpl_acl_from_xattr(const void *value, int size)
|
|
{
|
|
return (posix_acl_from_xattr(kcred->user_ns, value, size));
|
|
}
|
|
|
|
static inline int
|
|
zpl_acl_to_xattr(struct posix_acl *acl, void *value, int size)
|
|
{
|
|
return (posix_acl_to_xattr(kcred->user_ns, acl, value, size));
|
|
}
|
|
|
|
#else
|
|
|
|
static inline struct posix_acl *
|
|
zpl_acl_from_xattr(const void *value, int size)
|
|
{
|
|
return (posix_acl_from_xattr(value, size));
|
|
}
|
|
|
|
static inline int
|
|
zpl_acl_to_xattr(struct posix_acl *acl, void *value, int size)
|
|
{
|
|
return (posix_acl_to_xattr(acl, value, size));
|
|
}
|
|
#endif /* HAVE_POSIX_ACL_FROM_XATTR_USERNS */
|
|
|
|
#endif /* _ZFS_XATTR_H */
|