btrfs: link against libbtrfsutil

libblockdev has historically used btrfs-progs CLI utilities in the
meanwhile libbtrfsutil has been developed and used by snapper.

Not parsing CLI output and using the library functions should provide a
more stable way to gather information from btrfs.

.packit.yaml

@@ -62,6 +62,7 @@ srpm_build_deps:
  - autoconf
  - autoconf-archive
  - automake
+ - btrfs-progs-devel
  - cryptsetup-devel
  - device-mapper-devel
  - e2fsprogs-devel

configure.ac

@@ -229,6 +229,10 @@ AS_IF([test "x$with_fs" != "xno" -o "x$with_crypto" != "xno" -o "x$with_swap" !=
              [Define as neutral value if libblkid doesn't provide the definition])])]
       [])
 
+AS_IF([test "x$with_btrfs" != "xno"],
+      [LIBBLOCKDEV_PKG_CHECK_MODULES([LIBBTRFSUTIL], [libbtrfsutil >= 6.6])],
+      [])
+
 AS_IF([test "x$with_btrfs" != "xno" -o "x$with_mdraid" != "xno" -o "x$with_tools" != "xno"],
       [LIBBLOCKDEV_PKG_CHECK_MODULES([BYTESIZE], [bytesize >= 0.1])],
       [])

dist/libblockdev.spec.in

@@ -164,7 +164,7 @@ with the libblockdev-utils library.
 
 %if %{with_btrfs}
 %package btrfs
-BuildRequires: libbytesize-devel
+BuildRequires: libbytesize-devel btrfs-progs-devel
 Summary:     The BTRFS plugin for the libblockdev library
 Requires: %{name}-utils%{?_isa} = %{version}-%{release}
 Requires: btrfs-progs

misc/install-test-dependencies.yml

@@ -33,6 +33,7 @@
   - name: Install build dependencies not covered by dnf builddep (Fedora)
     package: name={{item}} state=present
     with_items:
+      - btrfs-progs-devel
       - libfdisk-devel
       - keyutils-libs-devel
       - libnvme-devel
@@ -162,6 +163,7 @@
   - name: Install build dependencies not covered by apt build-dep (Debian/Ubuntu)
     package: name={{item}} state=present
     with_items:
+      - libbtrfsutil-dev
       - libfdisk-dev
       - libkeyutils-dev
       - libext2fs-dev

src/plugins/Makefile.am

@@ -60,8 +60,8 @@ endif
 
 
 if WITH_BTRFS
-libbd_btrfs_la_CFLAGS = $(GLIB_CFLAGS) $(GIO_CFLAGS) $(BYTESIZE_CFLAGS) -Wall -Wextra -Werror
-libbd_btrfs_la_LIBADD = ${builddir}/../utils/libbd_utils.la $(GLIB_LIBS) $(GIO_LIBS) $(BYTESIZE_LIBS)
+libbd_btrfs_la_CFLAGS = $(GLIB_CFLAGS) $(GIO_CFLAGS) $(BYTESIZE_CFLAGS) $(LIBBTRFSUTIL_CFLAGS) -Wall -Wextra -Werror
+libbd_btrfs_la_LIBADD = ${builddir}/../utils/libbd_utils.la $(GLIB_LIBS) $(GIO_LIBS) $(BYTESIZE_LIBS) $(LIBBTRFSUTIL_LIBS)
 libbd_btrfs_la_LDFLAGS = -L${srcdir}/../utils/ -version-info 3:0:0 -Wl,--no-undefined -export-symbols-regex '^bd_.*'
 libbd_btrfs_la_CPPFLAGS = -I${builddir}/../../include/
 libbd_btrfs_la_SOURCES = btrfs.c btrfs.h check_deps.c check_deps.h