From 52572b6fdd88a9a9349581c03625126dd7de80b0 Mon Sep 17 00:00:00 2001
From: "Dmitry V. Levin" <ldv@altlinux.org>
Date: Thu, 11 Dec 2014 19:21:54 +0000
Subject: [PATCH] Implement decoding of fallocate FALLOC_FL_* flags

* xlat/falloc_flags.in: New file.
* configure.ac (AC_CHECK_HEADERS): Add linux/falloc.h.
* fallocate.c [HAVE_LINUX_FALLOC_H]: Include <linux/falloc.h>.
Include xlat/falloc_flags.h.
(sys_fallocate): Decode flags.
---
 configure.ac         |  1 +
 fallocate.c          | 24 ++++++++++++++++++++----
 xlat/falloc_flags.in |  5 +++++
 3 files changed, 26 insertions(+), 4 deletions(-)
 create mode 100644 xlat/falloc_flags.in

diff --git a/configure.ac b/configure.ac
index 8dba8afd..fbd8a83d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -232,6 +232,7 @@ AC_CHECK_HEADERS(m4_normalize([
 	elf.h
 	inttypes.h
 	ioctls.h
+	linux/falloc.h
 	linux/perf_event.h
 	linux/ptrace.h
 	linux/utsname.h
diff --git a/fallocate.c b/fallocate.c
index c906cc53..990106d2 100644
--- a/fallocate.c
+++ b/fallocate.c
@@ -1,14 +1,30 @@
 #include "defs.h"
 
+#ifdef HAVE_LINUX_FALLOC_H
+# include <linux/falloc.h>
+#endif
+
+#include "xlat/falloc_flags.h"
+
 int
 sys_fallocate(struct tcb *tcp)
 {
 	if (entering(tcp)) {
 		int argn;
-		printfd(tcp, tcp->u_arg[0]);		/* fd */
-		tprintf(", %#lo, ", tcp->u_arg[1]);	/* mode */
-		argn = printllval(tcp, "%llu, ", 2);	/* offset */
-		printllval(tcp, "%llu", argn);		/* len */
+
+		/* fd */
+		printfd(tcp, tcp->u_arg[0]);
+		tprints(", ");
+
+		/* mode */
+		printflags(falloc_flags, tcp->u_arg[1], "FALLOC_FL_???");
+		tprints(", ");
+
+		/* offset */
+		argn = printllval(tcp, "%llu, ", 2);
+
+		/* len */
+		printllval(tcp, "%llu", argn);
 	}
 	return 0;
 }
diff --git a/xlat/falloc_flags.in b/xlat/falloc_flags.in
new file mode 100644
index 00000000..ff411bb3
--- /dev/null
+++ b/xlat/falloc_flags.in
@@ -0,0 +1,5 @@
+FALLOC_FL_KEEP_SIZE
+FALLOC_FL_PUNCH_HOLE
+FALLOC_FL_NO_HIDE_STALE
+FALLOC_FL_COLLAPSE_RANGE
+FALLOC_FL_ZERO_RANGE
-- 
2.40.0