granicus.if.org Git - zfs/blob - config/kernel-bio-failfast.m4

   1 dnl #
   2 dnl # Preferred interface for setting FAILFAST on a bio:
   3 dnl #   2.6.28-2.6.35: BIO_RW_FAILFAST_{DEV|TRANSPORT|DRIVER}
   4 dnl #       >= 2.6.36: REQ_FAILFAST_{DEV|TRANSPORT|DRIVER}
   5 dnl #
   6
   7 AC_DEFUN([ZFS_AC_KERNEL_BIO_FAILFAST_DTD], [
   8         AC_MSG_CHECKING([whether BIO_RW_FAILFAST_* are defined])
   9         ZFS_LINUX_TRY_COMPILE([
  10                 #include <linux/bio.h>
  11         ],[
  12                 int flags __attribute__ ((unused));
  13                 flags = ((1 << BIO_RW_FAILFAST_DEV) |
  14                          (1 << BIO_RW_FAILFAST_TRANSPORT) |
  15                          (1 << BIO_RW_FAILFAST_DRIVER));
  16         ],[
  17                 AC_MSG_RESULT(yes)
  18                 AC_DEFINE(HAVE_BIO_RW_FAILFAST_DTD, 1,
  19                           [BIO_RW_FAILFAST_* are defined])
  20         ],[
  21                 AC_MSG_RESULT(no)
  22         ])
  23 ])
  24
  25 AC_DEFUN([ZFS_AC_KERNEL_REQ_FAILFAST_MASK], [
  26         AC_MSG_CHECKING([whether REQ_FAILFAST_MASK is defined])
  27         ZFS_LINUX_TRY_COMPILE([
  28                 #include <linux/bio.h>
  29         ],[
  30                 int flags __attribute__ ((unused));
  31                 flags = REQ_FAILFAST_MASK;
  32         ],[
  33                 AC_MSG_RESULT(yes)
  34                 AC_DEFINE(HAVE_REQ_FAILFAST_MASK, 1,
  35                           [REQ_FAILFAST_MASK is defined])
  36         ],[
  37                 AC_MSG_RESULT(no)
  38         ])
  39 ])