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Since the concept of a kuid and the need to translate from it to ordinary integer type was added in kernel version 3.5 implement necessary plumbing to be able to detect this condition during compile time. If the kernel doesn't support the kuid then just fall back to directly accessing the respective struct inode's members Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Issue #4685 Issue #227
23 lines
570 B
Plaintext
23 lines
570 B
Plaintext
dnl #
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dnl # 3.5 API change,
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dnl # Since usernamespaces were introduced in kernel version 3.5, it
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dnl # became necessary to go through one more level of indirection
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dnl # when dealing with uid/gid - namely the kuid type.
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dnl #
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_KUID_HELPERS], [
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AC_MSG_CHECKING([whether i_(uid|gid)_(read|write) exist])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/fs.h>
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],[
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struct inode *ip = NULL;
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(void) i_uid_read(ip);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_KUID_HELPERS, 1,
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[i_(uid|gid)_(read|write) exist])
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],[
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AC_MSG_RESULT(no)
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])
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])
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