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f0aca5f7bb
Linux kernel 6.3 changed a bunch of APIs to use the dedicated idmap type for mounts (struct mnt_idmap), we need to detect these changes and make zfs work with the new APIs. NOTE: This backport only includes the configure checks to detect the 6.3 idmap API changes. It does not include support for idmap. When provided the idmap variable is ignored in most case in the same way the user_ns argument was ignored. This change is solely to provide compatibility with the new interfaces. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Youzhong Yang <yyang@mathworks.com> Closes #14682
231 lines
7.2 KiB
C
231 lines
7.2 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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typedef const struct xattr_handler xattr_handler_t;
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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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#else
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#error "Unsupported kernel"
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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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* Android API change,
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* The xattr_handler->get() callback was changed to take a dentry and inode
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* and flags, because the dentry might not be attached to an inode yet.
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*/
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#elif defined(HAVE_XATTR_GET_DENTRY_INODE_FLAGS)
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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, \
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size_t size, int flags) \
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{ \
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return (__ ## fn(inode, name, buffer, size)); \
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}
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#else
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#error "Unsupported kernel"
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#endif
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/*
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* 6.3 API change,
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* The xattr_handler->set() callback was changed to take the
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* struct mnt_idmap* as the first arg, to support idmapped
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* mounts.
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*/
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#if defined(HAVE_XATTR_SET_IDMAP)
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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 mnt_idmap *user_ns, \
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struct dentry *dentry, struct inode *inode, const char *name, \
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const void *buffer, size_t size, int flags) \
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{ \
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return (__ ## fn(user_ns, inode, name, buffer, size, flags)); \
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}
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/*
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* 5.12 API change,
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* The xattr_handler->set() callback was changed to take the
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* struct user_namespace* as the first arg, to support idmapped
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* mounts.
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*/
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#elif defined(HAVE_XATTR_SET_USERNS)
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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 user_namespace *user_ns, \
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struct dentry *dentry, struct inode *inode, const char *name, \
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const void *buffer, size_t size, int flags) \
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{ \
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return (__ ## fn(user_ns, inode, name, buffer, size, flags)); \
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}
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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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#elif 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(kcred->user_ns, 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(kcred->user_ns, dentry->d_inode, name, \
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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(kcred->user_ns, dentry->d_inode, name, buffer, \
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size, flags)); \
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}
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#else
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#error "Unsupported kernel"
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#endif
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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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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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#endif /* _ZFS_XATTR_H */
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