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btrfs-progs: build: improve autodetection of zoned mode

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The zoned support requires a header file and some structures for full
support. There are distros that have only part of that and the
autodetection at configure time does not handle that properly, assuming
the user requested the support.

Check if there was any of the --*able-zoned options and if not detect
the support level and fallback to no zoned eventually, not requiring
users to specify --disable-zoned as before.

Issue: #425
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2022-02-07 18:41:03 +01:00
parent b2acf53520
commit 5ef8654eb7
1 changed files with 23 additions and 2 deletions
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25
configure.ac
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@ -282,10 +282,31 @@ AC_CHECK_HEADER(linux/blkzoned.h, [blkzoned_found=yes], [blkzoned_found=no])
AC_CHECK_MEMBER([struct blk_zone.capacity], [blkzoned_capacity=yes], [blkzoned_capacity=no], [[#include <linux/blkzoned.h>]])
AX_CHECK_DEFINE([linux/blkzoned.h], [BLKGETZONESZ], [blkzoned_getzonesz=yes], [blkzoned_getzonesz=no])
AC_ARG_ENABLE([zoned],
AS_HELP_STRING([--disable-zoned], [disable zoned block device support]),
[], [enable_zoned=$blkzoned_found]
AS_HELP_STRING([--disable-zoned], [disable zoned block device support (default: detect)]),
[], [enable_zoned=$blkzoned_capacity]
)
# Autodetect zoned support
AS_IF([test "x$enableval" = "x"], [
cansupportzoned=yes
if test "x$blkzoned_found" = xno; then
cansupportzoned=no
fi
if test "x$blkzoned_capacity" = xno; then
cansupportzoned=no
fi
if test "x$blkzoned_getzonesz" = xno; then
cansupportzoned=no
fi
if test "x$cansupportzoned" = xno; then
AC_MSG_NOTICE([insufficient support for zoned mode, cannot enable])
enable_zoned=no
else
enable_zoned=yes
fi
])
# Explicitly requested by --enable-zoned
AS_IF([test "x$enable_zoned" = xyes], [
if test "x$blkzoned_found" = xno; then
AC_MSG_ERROR([Couldn't find linux/blkzoned.h])