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066e825221
Increase the minimum supported kernel version from 2.6.32 to 3.10.
This removes support for the following Linux enterprise distributions.
Distribution | Kernel | End of Life
---------------- | ------ | -------------
Ubuntu 12.04 LTS | 3.2 | Apr 28, 2017
SLES 11 | 3.0 | Mar 32, 2019
RHEL / CentOS 6 | 2.6.32 | Nov 30, 2020
The following changes were made as part of removing support.
* Updated `configure` to enforce a minimum kernel version as
specified in the META file (Linux-Minimum: 3.10).
configure: error:
*** Cannot build against kernel version 2.6.32.
*** The minimum supported kernel version is 3.10.
* Removed all `configure` kABI checks and matching C code for
interfaces which solely predate the Linux 3.10 kernel.
* Updated all `configure` kABI checks to fail when an interface is
missing which was in the 3.10 kernel up to the latest 5.1 kernel.
Removed the HAVE_* preprocessor defines for these checks and
updated the code to unconditionally use the verified interface.
* Inverted the detection logic in several kABI checks to match
the new interface as it appears in 3.10 and newer and not the
legacy interface.
* Consolidated the following checks in to individual files. Due
the large number of changes in the checks it made sense to handle
this now. It would be desirable to group other related checks in
the same fashion, but this as left as future work.
- config/kernel-blkdev.m4 - Block device kABI checks
- config/kernel-blk-queue.m4 - Block queue kABI checks
- config/kernel-bio.m4 - Bio interface kABI checks
* Removed the kABI checks for sops->nr_cached_objects() and
sops->free_cached_objects(). These interfaces are currently unused.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #9566
185 lines
5.6 KiB
C
185 lines
5.6 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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#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->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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#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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