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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
167 lines
4.1 KiB
Plaintext
167 lines
4.1 KiB
Plaintext
dnl #
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dnl # 3.4.0 API change
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dnl # Added d_make_root() to replace previous d_alloc_root() function.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_D_MAKE_ROOT], [
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ZFS_LINUX_TEST_SRC([d_make_root], [
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#include <linux/dcache.h>
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], [
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d_make_root(NULL);
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_D_MAKE_ROOT], [
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AC_MSG_CHECKING([whether d_make_root() is available])
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ZFS_LINUX_TEST_RESULT_SYMBOL([d_make_root],
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[d_make_root], [fs/dcache.c], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_D_MAKE_ROOT, 1, [d_make_root() is available])
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], [
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AC_MSG_RESULT(no)
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])
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])
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dnl #
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dnl # 2.6.28 API change
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dnl # Added d_obtain_alias() helper function.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_D_OBTAIN_ALIAS], [
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ZFS_LINUX_TEST_SRC([d_obtain_alias], [
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#include <linux/dcache.h>
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], [
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d_obtain_alias(NULL);
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_D_OBTAIN_ALIAS], [
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AC_MSG_CHECKING([whether d_obtain_alias() is available])
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ZFS_LINUX_TEST_RESULT_SYMBOL([d_obtain_alias],
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[d_obtain_alias], [fs/dcache.c], [
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AC_MSG_RESULT(yes)
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], [
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ZFS_LINUX_TEST_ERROR([d_obtain_alias()])
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])
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])
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dnl #
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dnl # 2.6.12 API change
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dnl # d_prune_aliases() helper function available.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_D_PRUNE_ALIASES], [
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ZFS_LINUX_TEST_SRC([d_prune_aliases], [
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#include <linux/dcache.h>
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], [
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struct inode *ip = NULL;
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d_prune_aliases(ip);
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_D_PRUNE_ALIASES], [
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AC_MSG_CHECKING([whether d_prune_aliases() is available])
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ZFS_LINUX_TEST_RESULT_SYMBOL([d_prune_aliases],
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[d_prune_aliases], [fs/dcache.c], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_D_PRUNE_ALIASES, 1,
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[d_prune_aliases() is available])
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], [
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ZFS_LINUX_TEST_ERROR([d_prune_aliases()])
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])
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])
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dnl #
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dnl # 2.6.38 API change
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dnl # Added d_set_d_op() helper function.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_D_SET_D_OP], [
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ZFS_LINUX_TEST_SRC([d_set_d_op], [
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#include <linux/dcache.h>
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], [
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d_set_d_op(NULL, NULL);
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_D_SET_D_OP], [
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AC_MSG_CHECKING([whether d_set_d_op() is available])
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ZFS_LINUX_TEST_RESULT_SYMBOL([d_set_d_op],
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[d_set_d_op], [fs/dcache.c], [
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AC_MSG_RESULT(yes)
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], [
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ZFS_LINUX_TEST_ERROR([d_set_d_op])
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])
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])
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dnl #
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dnl # 3.6 API change
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_D_REVALIDATE_NAMEIDATA], [
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ZFS_LINUX_TEST_SRC([dentry_operations_revalidate], [
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#include <linux/dcache.h>
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#include <linux/sched.h>
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int revalidate (struct dentry *dentry,
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struct nameidata *nidata) { return 0; }
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static const struct dentry_operations
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dops __attribute__ ((unused)) = {
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.d_revalidate = revalidate,
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};
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],[])
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])
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AC_DEFUN([ZFS_AC_KERNEL_D_REVALIDATE_NAMEIDATA], [
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AC_MSG_CHECKING([whether dops->d_revalidate() takes struct nameidata])
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ZFS_LINUX_TEST_RESULT([dentry_operations_revalidate], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_D_REVALIDATE_NAMEIDATA, 1,
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[dops->d_revalidate() operation takes nameidata])
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],[
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AC_MSG_RESULT(no)
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])
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])
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dnl #
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dnl # 2.6.30 API change
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dnl # The 'struct dentry_operations' was constified in the dentry structure.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_CONST_DENTRY_OPERATIONS], [
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ZFS_LINUX_TEST_SRC([dentry_operations_const], [
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#include <linux/dcache.h>
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const struct dentry_operations test_d_op = {
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.d_revalidate = NULL,
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};
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],[
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struct dentry d __attribute__ ((unused));
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d.d_op = &test_d_op;
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_CONST_DENTRY_OPERATIONS], [
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AC_MSG_CHECKING([whether dentry uses const struct dentry_operations])
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ZFS_LINUX_TEST_RESULT([dentry_operations_const], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_CONST_DENTRY_OPERATIONS, 1,
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[dentry uses const struct dentry_operations])
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],[
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ZFS_LINUX_TEST_ERROR([const dentry_operations])
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_SRC_DENTRY], [
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ZFS_AC_KERNEL_SRC_D_MAKE_ROOT
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ZFS_AC_KERNEL_SRC_D_OBTAIN_ALIAS
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ZFS_AC_KERNEL_SRC_D_PRUNE_ALIASES
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ZFS_AC_KERNEL_SRC_D_SET_D_OP
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ZFS_AC_KERNEL_SRC_D_REVALIDATE_NAMEIDATA
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ZFS_AC_KERNEL_SRC_CONST_DENTRY_OPERATIONS
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])
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AC_DEFUN([ZFS_AC_KERNEL_DENTRY], [
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ZFS_AC_KERNEL_D_MAKE_ROOT
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ZFS_AC_KERNEL_D_OBTAIN_ALIAS
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ZFS_AC_KERNEL_D_PRUNE_ALIASES
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ZFS_AC_KERNEL_D_SET_D_OP
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ZFS_AC_KERNEL_D_REVALIDATE_NAMEIDATA
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ZFS_AC_KERNEL_CONST_DENTRY_OPERATIONS
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])
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