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Linux 4.9 compat: group_info changes

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In Linux 4.9, torvalds/linux@81243ea, group_info changed from 2d array via
->blocks to 1d array via ->gid. We change the spl cred functions accordingly.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Closes #581
This commit is contained in:
Chunwei Chen
2016-10-18 17:30:41 -07:00
committed by Brian Behlendorf
parent 87063d7dc3
commit ae7eda1dde
4 changed files with 41 additions and 2 deletions
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config/spl-build.m4
+23
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@@ -49,6 +49,7 @@ AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
SPL_AC_WAIT_ON_BIT
SPL_AC_MUTEX_OWNER
SPL_AC_INODE_LOCK
SPL_AC_GROUP_INFO_GID
])
AC_DEFUN([SPL_AC_MODULE_SYMVERS], [
@@ -1574,3 +1575,25 @@ AC_DEFUN([SPL_AC_INODE_LOCK], [
])
EXTRA_KCFLAGS="$tmp_flags"
])
dnl #
dnl # 4.9 API change
dnl # group_info changed from 2d array via >blocks to 1d array via ->gid
dnl #
AC_DEFUN([SPL_AC_GROUP_INFO_GID], [
AC_MSG_CHECKING([whether group_info->gid exists])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
SPL_LINUX_TRY_COMPILE([
#include <linux/cred.h>
],[
struct group_info *gi = groups_alloc(1);
gi->gid[0] = KGIDT_INIT(0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_GROUP_INFO_GID, 1, [group_info->gid exists])
],[
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])