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mirror_zfs/config/kernel-bio.m4

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Linux compat: Minimum kernel version 3.10 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
2019-11-12 19:59:06 +03:00
dnl #
dnl # 2.6.36 API change,
dnl # REQ_FAILFAST_{DEV|TRANSPORT|DRIVER}
dnl # REQ_DISCARD
dnl # REQ_FLUSH
dnl #
dnl # 4.8 - 4.9 API,
dnl # REQ_FLUSH was renamed to REQ_PREFLUSH
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_REQ], [
ZFS_LINUX_TEST_SRC([req_failfast_mask], [
#include <linux/bio.h>
],[
int flags __attribute__ ((unused));
flags = REQ_FAILFAST_MASK;
])
ZFS_LINUX_TEST_SRC([req_discard], [
#include <linux/bio.h>
],[
int flags __attribute__ ((unused));
flags = REQ_DISCARD;
])
ZFS_LINUX_TEST_SRC([req_flush], [
#include <linux/bio.h>
],[
int flags __attribute__ ((unused));
flags = REQ_FLUSH;
])
ZFS_LINUX_TEST_SRC([req_preflush], [
#include <linux/bio.h>
],[
int flags __attribute__ ((unused));
flags = REQ_PREFLUSH;
])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_REQ_FAILFAST_MASK], [
AC_MSG_CHECKING([whether REQ_FAILFAST_MASK is defined])
ZFS_LINUX_TEST_RESULT([req_failfast_mask], [
AC_MSG_RESULT(yes)
],[
ZFS_LINUX_TEST_ERROR([REQ_FAILFAST_MASK])
])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_REQ_DISCARD], [
AC_MSG_CHECKING([whether REQ_DISCARD is defined])
ZFS_LINUX_TEST_RESULT([req_discard], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_REQ_DISCARD, 1, [REQ_DISCARD is defined])
],[
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_REQ_FLUSH], [
AC_MSG_CHECKING([whether REQ_FLUSH is defined])
ZFS_LINUX_TEST_RESULT([req_flush], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_REQ_FLUSH, 1, [REQ_FLUSH is defined])
],[
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_REQ_PREFLUSH], [
AC_MSG_CHECKING([whether REQ_PREFLUSH is defined])
ZFS_LINUX_TEST_RESULT([req_preflush], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_REQ_PREFLUSH, 1, [REQ_PREFLUSH is defined])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # Linux 4.8 API,
dnl #
dnl # The bio_op() helper was introduced as a replacement for explicitly
dnl # checking the bio->bi_rw flags. The following checks are used to
dnl # detect if a specific operation is supported.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BIO_OPS], [
ZFS_LINUX_TEST_SRC([req_op_discard], [
#include <linux/blk_types.h>
],[
int op __attribute__ ((unused)) = REQ_OP_DISCARD;
])
ZFS_LINUX_TEST_SRC([req_op_secure_erase], [
#include <linux/blk_types.h>
],[
int op __attribute__ ((unused)) = REQ_OP_SECURE_ERASE;
])
ZFS_LINUX_TEST_SRC([req_op_flush], [
#include <linux/blk_types.h>
],[
int op __attribute__ ((unused)) = REQ_OP_FLUSH;
])
ZFS_LINUX_TEST_SRC([bio_bi_opf], [
#include <linux/bio.h>
],[
struct bio bio __attribute__ ((unused));
bio.bi_opf = 0;
])
ZFS_LINUX_TEST_SRC([bio_set_op_attrs], [
#include <linux/bio.h>
],[
struct bio *bio __attribute__ ((unused)) = NULL;
bio_set_op_attrs(bio, 0, 0);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_REQ_OP_DISCARD], [
AC_MSG_CHECKING([whether REQ_OP_DISCARD is defined])
ZFS_LINUX_TEST_RESULT([req_op_discard], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_REQ_OP_DISCARD, 1, [REQ_OP_DISCARD is defined])
],[
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_REQ_OP_SECURE_ERASE], [
AC_MSG_CHECKING([whether REQ_OP_SECURE_ERASE is defined])
ZFS_LINUX_TEST_RESULT([req_op_secure_erase], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_REQ_OP_SECURE_ERASE, 1,
[REQ_OP_SECURE_ERASE is defined])
],[
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_REQ_OP_FLUSH], [
AC_MSG_CHECKING([whether REQ_OP_FLUSH is defined])
ZFS_LINUX_TEST_RESULT([req_op_flush], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_REQ_OP_FLUSH, 1, [REQ_OP_FLUSH is defined])
],[
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_BI_OPF], [
AC_MSG_CHECKING([whether bio->bi_opf is defined])
ZFS_LINUX_TEST_RESULT([bio_bi_opf], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BIO_BI_OPF, 1, [bio->bi_opf is defined])
],[
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_SET_OP_ATTRS], [
AC_MSG_CHECKING([whether bio_set_op_attrs is available])
ZFS_LINUX_TEST_RESULT([bio_set_op_attrs], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BIO_SET_OP_ATTRS, 1,
[bio_set_op_attrs is available])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # Linux 4.14 API,
dnl #
dnl # The bio_set_dev() helper macro was introduced as part of the transition
dnl # to have struct gendisk in struct bio.
dnl #
dnl # Linux 5.0 API,
dnl #
dnl # The bio_set_dev() helper macro was updated to internally depend on
dnl # bio_associate_blkg() symbol which is exported GPL-only.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BIO_SET_DEV], [
ZFS_LINUX_TEST_SRC([bio_set_dev], [
#include <linux/bio.h>
#include <linux/fs.h>
],[
struct block_device *bdev = NULL;
struct bio *bio = NULL;
bio_set_dev(bio, bdev);
], [], [$ZFS_META_LICENSE])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_SET_DEV], [
AC_MSG_CHECKING([whether bio_set_dev() is available])
ZFS_LINUX_TEST_RESULT([bio_set_dev], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BIO_SET_DEV, 1, [bio_set_dev() is available])
AC_MSG_CHECKING([whether bio_set_dev() is GPL-only])
ZFS_LINUX_TEST_RESULT([bio_set_dev_license], [
AC_MSG_RESULT(no)
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BIO_SET_DEV_GPL_ONLY, 1,
[bio_set_dev() GPL-only])
])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 4.3 API change
dnl # Error argument dropped from bio_endio in favor of newly introduced
dnl # bio->bi_error. This also replaces bio->bi_flags value BIO_UPTODATE.
dnl # Introduced by torvalds/linux@4246a0b63bd8f56a1469b12eafeb875b1041a451
dnl # ("block: add a bi_error field to struct bio").
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BIO_END_IO_T_ARGS], [
ZFS_LINUX_TEST_SRC([bio_end_io_t_args], [
#include <linux/bio.h>
void wanted_end_io(struct bio *bio) { return; }
bio_end_io_t *end_io __attribute__ ((unused)) = wanted_end_io;
], [])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_END_IO_T_ARGS], [
AC_MSG_CHECKING([whether bio_end_io_t wants 1 arg])
ZFS_LINUX_TEST_RESULT([bio_end_io_t_args], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_1ARG_BIO_END_IO_T, 1,
[bio_end_io_t wants 1 arg])
], [
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 4.13 API change
dnl # The bio->bi_error field was replaced with bio->bi_status which is an
dnl # enum which describes all possible error types.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BIO_BI_STATUS], [
ZFS_LINUX_TEST_SRC([bio_bi_status], [
#include <linux/bio.h>
], [
struct bio bio __attribute__ ((unused));
blk_status_t status __attribute__ ((unused)) = BLK_STS_OK;
bio.bi_status = status;
])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_BI_STATUS], [
AC_MSG_CHECKING([whether bio->bi_status exists])
ZFS_LINUX_TEST_RESULT([bio_bi_status], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BIO_BI_STATUS, 1, [bio->bi_status exists])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 3.14 API change,
dnl # Immutable biovecs. A number of fields of struct bio are moved to
dnl # struct bvec_iter.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BIO_BVEC_ITER], [
ZFS_LINUX_TEST_SRC([bio_bvec_iter], [
#include <linux/bio.h>
],[
struct bio bio;
bio.bi_iter.bi_sector = 0;
])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_BVEC_ITER], [
AC_MSG_CHECKING([whether bio has bi_iter])
ZFS_LINUX_TEST_RESULT([bio_bvec_iter], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BIO_BVEC_ITER, 1, [bio has bi_iter])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 4.8 API change
dnl # The rw argument has been removed from submit_bio/submit_bio_wait.
dnl # Callers are now expected to set bio->bi_rw instead of passing it in.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BIO_SUBMIT_BIO], [
ZFS_LINUX_TEST_SRC([submit_bio], [
#include <linux/bio.h>
],[
blk_qc_t blk_qc;
struct bio *bio = NULL;
blk_qc = submit_bio(bio);
])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_SUBMIT_BIO], [
AC_MSG_CHECKING([whether submit_bio() wants 1 arg])
ZFS_LINUX_TEST_RESULT([submit_bio], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_1ARG_SUBMIT_BIO, 1, [submit_bio() wants 1 arg])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.34 API change
dnl # current->bio_list
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_BIO_CURRENT_BIO_LIST], [
ZFS_LINUX_TEST_SRC([current_bio_list], [
#include <linux/sched.h>
], [
current->bio_list = (struct bio_list *) NULL;
])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_CURRENT_BIO_LIST], [
AC_MSG_CHECKING([whether current->bio_list exists])
ZFS_LINUX_TEST_RESULT([current_bio_list], [
AC_MSG_RESULT(yes)
],[
ZFS_LINUX_TEST_ERROR([bio_list])
])
])
AC_DEFUN([ZFS_AC_KERNEL_SRC_BIO], [
ZFS_AC_KERNEL_SRC_REQ
ZFS_AC_KERNEL_SRC_BIO_OPS
ZFS_AC_KERNEL_SRC_BIO_SET_DEV
ZFS_AC_KERNEL_SRC_BIO_END_IO_T_ARGS
ZFS_AC_KERNEL_SRC_BIO_BI_STATUS
ZFS_AC_KERNEL_SRC_BIO_BVEC_ITER
ZFS_AC_KERNEL_SRC_BIO_SUBMIT_BIO
ZFS_AC_KERNEL_SRC_BIO_CURRENT_BIO_LIST
])
AC_DEFUN([ZFS_AC_KERNEL_BIO], [
ZFS_AC_KERNEL_BIO_REQ_FAILFAST_MASK
ZFS_AC_KERNEL_BIO_REQ_DISCARD
ZFS_AC_KERNEL_BIO_REQ_FLUSH
ZFS_AC_KERNEL_BIO_REQ_PREFLUSH
ZFS_AC_KERNEL_BIO_REQ_OP_DISCARD
ZFS_AC_KERNEL_BIO_REQ_OP_SECURE_ERASE
ZFS_AC_KERNEL_BIO_REQ_OP_FLUSH
ZFS_AC_KERNEL_BIO_BI_OPF
ZFS_AC_KERNEL_BIO_SET_OP_ATTRS
ZFS_AC_KERNEL_BIO_SET_DEV
ZFS_AC_KERNEL_BIO_END_IO_T_ARGS
ZFS_AC_KERNEL_BIO_BI_STATUS
ZFS_AC_KERNEL_BIO_BVEC_ITER
ZFS_AC_KERNEL_BIO_SUBMIT_BIO
ZFS_AC_KERNEL_BIO_CURRENT_BIO_LIST
])
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