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