From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Update the file creation helper to try fallocate when restoring a
filesystem before it tries RESVSP.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
configure.ac | 2 ++
include/builddefs.in | 1 +
m4/Makefile | 1 +
m4/package_libcdev.m4 | 15 +++++++++++++++
restore/Makefile | 4 ++++
restore/dirattr.c | 11 +++++++++++
6 files changed, 34 insertions(+)
create mode 100644 m4/package_libcdev.m4
diff --git a/configure.ac b/configure.ac
index a77054c..73dedd7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -84,6 +84,8 @@ AC_PACKAGE_NEED_ATTRIBUTES_H
AC_PACKAGE_NEED_ATTRIBUTES_MACROS
AC_PACKAGE_NEED_ATTRGET_LIBATTR
+AC_HAVE_FALLOCATE
+
AC_MANUAL_FORMAT
AC_CONFIG_FILES([include/builddefs])
diff --git a/include/builddefs.in b/include/builddefs.in
index 269c928..1c7e12f 100644
--- a/include/builddefs.in
+++ b/include/builddefs.in
@@ -69,6 +69,7 @@ ENABLE_SHARED = @enable_shared@
ENABLE_GETTEXT = @enable_gettext@
HAVE_ZIPPED_MANPAGES = @have_zipped_manpages@
+HAVE_FALLOCATE = @have_fallocate@
GCCFLAGS = -funsigned-char -fno-strict-aliasing -Wall
# -Wbitwise -Wno-transparent-union -Wno-old-initializer -Wno-decl
diff --git a/m4/Makefile b/m4/Makefile
index 9a35056..ae452f7 100644
--- a/m4/Makefile
+++ b/m4/Makefile
@@ -16,6 +16,7 @@ LSRCFILES = \
manual_format.m4 \
package_attrdev.m4 \
package_globals.m4 \
+ package_libcdev.m4 \
package_ncurses.m4 \
package_pthread.m4 \
package_utilies.m4 \
diff --git a/m4/package_libcdev.m4 b/m4/package_libcdev.m4
new file mode 100644
index 0000000..050f82c
--- /dev/null
+++ b/m4/package_libcdev.m4
@@ -0,0 +1,15 @@
+#
+# Check if we have a fallocate libc call (Linux)
+#
+AC_DEFUN([AC_HAVE_FALLOCATE],
+ [ AC_MSG_CHECKING([for fallocate])
+ AC_TRY_LINK([
+#include <fcntl.h>
+#include <linux/falloc.h>
+ ], [
+ fallocate(0, 0, 0, 0);
+ ], have_fallocate=yes
+ AC_MSG_RESULT(yes),
+ AC_MSG_RESULT(no))
+ AC_SUBST(have_fallocate)
+ ])
diff --git a/restore/Makefile b/restore/Makefile
index 20c870a..ac3f8c8 100644
--- a/restore/Makefile
+++ b/restore/Makefile
@@ -102,6 +102,10 @@ LTDEPENDENCIES = $(LIBRMT)
LCFLAGS = -DRESTORE
+ifeq ($(HAVE_FALLOCATE),yes)
+LCFLAGS += -DHAVE_FALLOCATE
+endif
+
default: depend $(LTCOMMAND)
include $(BUILDRULES)
diff --git a/restore/dirattr.c b/restore/dirattr.c
index 267bef0..15a16d1 100644
--- a/restore/dirattr.c
+++ b/restore/dirattr.c
@@ -75,6 +75,17 @@ create_filled_file(
if (fd < 0)
return fd;
+#ifdef HAVE_FALLOCATE
+ ret = fallocate(fd, 0, 0, size);
+ if (ret && (errno != EOPNOTSUPP && errno != ENOTTY))
+ mlog(MLOG_VERBOSE | MLOG_NOTE,
+_("attempt to reserve %lld bytes for %s using %s failed: %s (%d)\n"),
+ size, pathname, "fallocate",
+ strerror(errno), errno);
+ if (ret == 0)
+ goto done;
+#endif
+
ret = ioctl(fd, XFS_IOC_RESVSP64, &fl);
if (ret && (errno != EOPNOTSUPP && errno != ENOTTY))
mlog(MLOG_VERBOSE | MLOG_NOTE,
