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e862b7ecfc
Stock kernels older than 4.10 do not export the has_capability()
function which is required by commit e59a377. To avoid breaking
the build on older kernels revert to the safe legacy behavior and
return EACCES when privileges cannot be checked.
Reviewed-by: Ryan Moeller <ryan@ixsystems.com>
Reviewed-by: Matt Ahrens <matt@delphix.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #10565
Closes #10573
107 lines
2.6 KiB
Plaintext
107 lines
2.6 KiB
Plaintext
dnl #
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dnl # 2.6.38 API change
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dnl # ns_capable() was introduced
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_NS_CAPABLE], [
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ZFS_LINUX_TEST_SRC([ns_capable], [
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#include <linux/capability.h>
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],[
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ns_capable((struct user_namespace *)NULL, CAP_SYS_ADMIN);
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_NS_CAPABLE], [
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AC_MSG_CHECKING([whether ns_capable exists])
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ZFS_LINUX_TEST_RESULT([ns_capable], [
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AC_MSG_RESULT(yes)
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],[
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ZFS_LINUX_TEST_ERROR([ns_capable()])
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])
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])
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dnl #
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dnl # 4.10 API change
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dnl # has_capability() was exported.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_HAS_CAPABILITY], [
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ZFS_LINUX_TEST_SRC([has_capability], [
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#include <linux/capability.h>
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],[
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struct task_struct *task = NULL;
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int cap = 0;
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bool result __attribute__ ((unused));
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result = has_capability(task, cap);
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_HAS_CAPABILITY], [
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AC_MSG_CHECKING([whether has_capability() is available])
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ZFS_LINUX_TEST_RESULT_SYMBOL([has_capability],
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[has_capability], [kernel/capability.c], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_HAS_CAPABILITY, 1, [has_capability() 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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dnl #
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dnl # 2.6.39 API change
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dnl # struct user_namespace was added to struct cred_t as cred->user_ns member
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_CRED_USER_NS], [
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ZFS_LINUX_TEST_SRC([cred_user_ns], [
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#include <linux/cred.h>
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],[
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struct cred cr;
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cr.user_ns = (struct user_namespace *)NULL;
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_CRED_USER_NS], [
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AC_MSG_CHECKING([whether cred_t->user_ns exists])
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ZFS_LINUX_TEST_RESULT([cred_user_ns], [
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AC_MSG_RESULT(yes)
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],[
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ZFS_LINUX_TEST_ERROR([cred_t->user_ns()])
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])
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])
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dnl #
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dnl # 3.4 API change
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dnl # kuid_has_mapping() and kgid_has_mapping() were added to distinguish
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dnl # between internal kernel uids/gids and user namespace uids/gids.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_KUID_HAS_MAPPING], [
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ZFS_LINUX_TEST_SRC([kuid_has_mapping], [
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#include <linux/uidgid.h>
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],[
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kuid_has_mapping((struct user_namespace *)NULL, KUIDT_INIT(0));
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kgid_has_mapping((struct user_namespace *)NULL, KGIDT_INIT(0));
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_KUID_HAS_MAPPING], [
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AC_MSG_CHECKING([whether kuid_has_mapping/kgid_has_mapping exist])
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ZFS_LINUX_TEST_RESULT([kuid_has_mapping], [
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AC_MSG_RESULT(yes)
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],[
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ZFS_LINUX_TEST_ERROR([kuid_has_mapping()])
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_SRC_USERNS_CAPABILITIES], [
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ZFS_AC_KERNEL_SRC_NS_CAPABLE
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ZFS_AC_KERNEL_SRC_HAS_CAPABILITY
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ZFS_AC_KERNEL_SRC_CRED_USER_NS
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ZFS_AC_KERNEL_SRC_KUID_HAS_MAPPING
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])
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AC_DEFUN([ZFS_AC_KERNEL_USERNS_CAPABILITIES], [
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ZFS_AC_KERNEL_NS_CAPABLE
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ZFS_AC_KERNEL_HAS_CAPABILITY
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ZFS_AC_KERNEL_CRED_USER_NS
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ZFS_AC_KERNEL_KUID_HAS_MAPPING
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])
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