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configure: fix check for DEVLINK_CMD_ESWITCH_GET

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Instead of checking for all possible constants that every
kernel header with devlink support should have (and defining
HAVE_DECL_DEVLINK as 1 if any of them is present due to the
way AC_CHECK_DECLS works), only check for DEVLINK_CMD_ESWITCH_GET.

This is the name of the constant since kernel 4.11. Between 4.8
and 4.11, the now deprecated spelling DEVLINK_CMD_ESWITCH_MODE_GET
was used.

Assume DEVLINK_ESWITCH_MODE_SWITCHDEV is available, since it was
introduced along with the deprecated spelling.
This commit is contained in:
Ján Tomko 2017-09-18 13:21:47 -04:00
parent d085197ce2
commit cdd6eb99c2
2 changed files with 9 additions and 8 deletions
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13
configure.ac
View File

@ -628,15 +628,16 @@ if test "$with_linux" = "yes"; then
fi
dnl
dnl check for kernel headers required by devlink
dnl check for DEVLINK_CMD_ESWITCH_GET
dnl
dnl Assume DEVLINK_ESWITCH_MODE_SWITCHDEV is also
dnl available, as it was introudced in kernel 4.8
dnl along with the original spelling of this constant
dnl (DEVLINK_CMD_ESWITCH_MODE_GET, not supported by libvirt)
dnl
if test "$with_linux" = "yes"; then
AC_CHECK_HEADERS([linux/devlink.h])
AC_CHECK_DECLS([DEVLINK_GENL_VERSION, DEVLINK_GENL_NAME, DEVLINK_ATTR_MAX, DEVLINK_CMD_ESWITCH_GET, DEVLINK_ATTR_BUS_NAME, DEVLINK_ATTR_DEV_NAME, DEVLINK_ATTR_ESWITCH_MODE, DEVLINK_ESWITCH_MODE_SWITCHDEV],
[AC_DEFINE([HAVE_DECL_DEVLINK],
[1],
[whether devlink declarations are available])],
[],
AC_CHECK_DECLS([DEVLINK_CMD_ESWITCH_GET], [], [],
[[#include <linux/devlink.h>]])
fi

4
src/util/virnetdev.c
View File

@ -59,7 +59,7 @@
# include <net/if_dl.h>
#endif
#if HAVE_DECL_DEVLINK
#if HAVE_LINUX_DEVLINK_H
# include <linux/devlink.h>
#endif
@ -3120,7 +3120,7 @@ virNetDevGetEthtoolFeatures(virBitmapPtr bitmap,
}
# if HAVE_DECL_DEVLINK
# if HAVE_DECL_DEVLINK_CMD_ESWITCH_GET
/**
* virNetDevPutExtraHeader
* reserve and prepare room for an extra header