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Linux 2.6.36 compat, use REQ_FAILFAST_MASK and remove pre-2.6.36 support

Browse Source 
Commit f4af6bb783 which added support
for REQ_FAILFAST_MASK but the new autoconf test didn't use the same
preprocessor macro name as the code did.

The effect is that FAILFAST mode has not been enabled for ZoL in any
post-2.6.35 kernel.

Retire the HAVE_BIO_RW_FAILFAST interface used in pre-2.6.28 kernels.

Raise an error condition if the FAILFAST interface can't be detected.

Signed-off-by: Tim Chase <tim@onlight.com
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #3386
This commit is contained in:
Tim Chase 2015-05-08 15:49:56 -05:00 committed by Brian Behlendorf
parent 492b1d2ef0
commit e48533383b
3 changed files with 7 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
config/kernel-bio-failfast.m4
View File

@ -1,24 +1,8 @@
dnl #
dnl # Preferred interface for setting FAILFAST on a bio:
dnl # 2.6.12-2.6.27: BIO_RW_FAILFAST
dnl # 2.6.28-2.6.35: BIO_RW_FAILFAST_{DEV|TRANSPORT|DRIVER}
dnl # 2.6.36-2.6.xx: REQ_FAILFAST_{DEV|TRANSPORT|DRIVER}
dnl # >= 2.6.36: REQ_FAILFAST_{DEV|TRANSPORT|DRIVER}
dnl #
AC_DEFUN([ZFS_AC_KERNEL_BIO_FAILFAST], [
AC_MSG_CHECKING([whether BIO_RW_FAILFAST is defined])
ZFS_LINUX_TRY_COMPILE([
#include <linux/bio.h>
],[
int flags __attribute__ ((unused));
flags = (1 << BIO_RW_FAILFAST);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BIO_RW_FAILFAST, 1,
[BIO_RW_FAILFAST is defined])
],[
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_BIO_FAILFAST_DTD], [
AC_MSG_CHECKING([whether BIO_RW_FAILFAST_* are defined])
@ -47,7 +31,7 @@ AC_DEFUN([ZFS_AC_KERNEL_REQ_FAILFAST_MASK], [
flags = REQ_FAILFAST_MASK;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BIO_REQ_FAILFAST_MASK, 1,
AC_DEFINE(HAVE_REQ_FAILFAST_MASK, 1,
[REQ_FAILFAST_MASK is defined])
],[
AC_MSG_RESULT(no)

1
config/kernel.m4
View File

@ -19,7 +19,6 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE
ZFS_AC_KERNEL_BDEV_PHYSICAL_BLOCK_SIZE
ZFS_AC_KERNEL_BIO_BVEC_ITER
ZFS_AC_KERNEL_BIO_FAILFAST
ZFS_AC_KERNEL_BIO_FAILFAST_DTD
ZFS_AC_KERNEL_REQ_FAILFAST_MASK
ZFS_AC_KERNEL_BIO_END_IO_T_ARGS

15
include/linux/blkdev_compat.h
View File

@ -347,26 +347,21 @@ bio_set_flags_failfast(struct block_device *bdev, int *flags)
#endif /* BLOCK_EXT_MAJOR */
#endif /* CONFIG_BUG */
#ifdef HAVE_BIO_RW_FAILFAST_DTD
#if defined(HAVE_BIO_RW_FAILFAST_DTD)
/* BIO_RW_FAILFAST_* preferred interface from 2.6.28 - 2.6.35 */
*flags |= (
(1 << BIO_RW_FAILFAST_DEV) |
(1 << BIO_RW_FAILFAST_TRANSPORT) |
(1 << BIO_RW_FAILFAST_DRIVER));
#else
#ifdef HAVE_BIO_RW_FAILFAST
/* BIO_RW_FAILFAST preferred interface from 2.6.12 - 2.6.27 */
*flags |= (1 << BIO_RW_FAILFAST);
#else
#ifdef HAVE_REQ_FAILFAST_MASK
#elif defined(HAVE_REQ_FAILFAST_MASK)
/*
* REQ_FAILFAST_* preferred interface from 2.6.36 - 2.6.xx,
* the BIO_* and REQ_* flags were unified under REQ_* flags.
*/
*flags |= REQ_FAILFAST_MASK;
#endif /* HAVE_REQ_FAILFAST_MASK */
#endif /* HAVE_BIO_RW_FAILFAST */
#endif /* HAVE_BIO_RW_FAILFAST_DTD */
#else
#error "Undefined block IO FAILFAST interface."
#endif
}
/*