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21d5f25724
Use statx to verify that path-based unmounts proceed only if the mountpoint reported by statx matches the MNTTAB entry reported by libzfs, aborting the operation if they differ. Align `zfs umount /path` behavior with `zfs umount dataset`. Reviewed-by: Alexander Motin <mav@FreeBSD.org> Signed-off-by: Ameer Hamza <ahamza@ixsystems.com> Closes #17481
35 lines
847 B
Plaintext
35 lines
847 B
Plaintext
dnl #
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dnl # Check for statx() function and STATX_MNT_ID availability
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dnl #
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AC_DEFUN([ZFS_AC_CONFIG_USER_STATX], [
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AC_CHECK_HEADERS([linux/stat.h],
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[have_stat_headers=yes],
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[have_stat_headers=no])
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AS_IF([test "x$have_stat_headers" = "xyes"], [
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AC_CHECK_FUNC([statx], [
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AC_DEFINE([HAVE_STATX], [1], [statx() is available])
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dnl Check for STATX_MNT_ID availability
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AC_MSG_CHECKING([for STATX_MNT_ID])
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AC_COMPILE_IFELSE([
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AC_LANG_PROGRAM([[
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#include <linux/stat.h>
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]], [[
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struct statx stx;
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int mask = STATX_MNT_ID;
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(void)mask;
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(void)stx.stx_mnt_id;
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]])
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], [
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AC_MSG_RESULT([yes])
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AC_DEFINE([HAVE_STATX_MNT_ID], [1], [STATX_MNT_ID 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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], [
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AC_MSG_WARN([linux/stat.h not found; skipping statx support])
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])
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]) dnl end AC_DEFUN
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