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a5e046eaac
[bio] The req_op enum was changed to req_opf. Update the "Linux 4.8 API"
autotools checks to use an int to determine whether the various REQ_OP
values are defined. This should work properly on kernels >= 4.8.
[bio] bio_set_op_attrs() is now an inline function and can't be detected
with #ifdef. Add a configure check to determine whether bio_set_op_attrs()
is defined. Move the local definition of it from vdev_disk.c to
blkdev_compat.h for consistency with other related compability shims.
[bio] The read/write flags and their modifiers, including WRITE_FLUSH,
WRITE_FUA and WRITE_FLUSH_FUA have been removed from fs.h. Add the new
bio_set_flush() compatibility wrapper to replace VDEV_WRITE_FLUSH_FUA
and set the flags appropriately for each supported kernel version.
[vfs] The generic_readlink() function has been made static. If .readlink
in inode_operations is NULL, generic_readlink() is used.
[zol typo] Completely unrelated to 4.10 compat, fix a typo in the check
for REQ_OP_SECURE_ERASE so that the proper macro is defined:
s/HAVE_REQ_OP_SECURE_DISCARD/HAVE_REQ_OP_SECURE_ERASE/
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Chunwei Chen <david.chen@osnexus.com>
Signed-off-by: Tim Chase <tim@chase2k.com>
Closes #5499
85 lines
1.9 KiB
Plaintext
85 lines
1.9 KiB
Plaintext
dnl #
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dnl # Linux 4.8 API,
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dnl #
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dnl # The bio_op() helper was introduced as a replacement for explicitly
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dnl # checking the bio->bi_rw flags. The following checks are used to
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dnl # detect if a specific operation is supported.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_REQ_OP_DISCARD], [
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AC_MSG_CHECKING([whether REQ_OP_DISCARD is defined])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/blk_types.h>
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],[
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int op __attribute__ ((unused)) = REQ_OP_DISCARD;
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_REQ_OP_DISCARD, 1,
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[REQ_OP_DISCARD is defined])
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],[
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AC_MSG_RESULT(no)
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_REQ_OP_SECURE_ERASE], [
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AC_MSG_CHECKING([whether REQ_OP_SECURE_ERASE is defined])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/blk_types.h>
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],[
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int op __attribute__ ((unused)) = REQ_OP_SECURE_ERASE;
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_REQ_OP_SECURE_ERASE, 1,
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[REQ_OP_SECURE_ERASE is defined])
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],[
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AC_MSG_RESULT(no)
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_REQ_OP_FLUSH], [
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AC_MSG_CHECKING([whether REQ_OP_FLUSH is defined])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/blk_types.h>
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],[
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int op __attribute__ ((unused)) = REQ_OP_FLUSH;
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_REQ_OP_FLUSH, 1,
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[REQ_OP_FLUSH is defined])
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],[
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AC_MSG_RESULT(no)
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_BIO_BI_OPF], [
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AC_MSG_CHECKING([whether bio->bi_opf is defined])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/bio.h>
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],[
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struct bio bio __attribute__ ((unused));
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bio.bi_opf = 0;
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_BIO_BI_OPF, 1, [bio->bi_opf is defined])
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],[
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AC_MSG_RESULT(no)
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_HAVE_BIO_SET_OP_ATTRS], [
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AC_MSG_CHECKING([whether bio_set_op_attrs is available])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/blk_types.h>
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],[
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struct bio *bio __attribute__ ((unused)) = NULL;
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bio_set_op_attrs(bio, 0, 0);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_BIO_SET_OP_ATTRS, 1,
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[bio_set_op_attrs 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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