From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- tools/perf/trace/beauty/mount_flags.c | 43 +++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 tools/perf/trace/beauty/mount_flags.c (limited to 'tools/perf/trace/beauty/mount_flags.c') diff --git a/tools/perf/trace/beauty/mount_flags.c b/tools/perf/trace/beauty/mount_flags.c new file mode 100644 index 0000000000..10fb14cfaf --- /dev/null +++ b/tools/perf/trace/beauty/mount_flags.c @@ -0,0 +1,43 @@ +// SPDX-License-Identifier: LGPL-2.1 +/* + * trace/beauty/mount_flags.c + * + * Copyright (C) 2018, Red Hat Inc, Arnaldo Carvalho de Melo + */ + +#include "trace/beauty/beauty.h" +#include +#include +#include +#include + +static size_t mount__scnprintf_flags(unsigned long flags, char *bf, size_t size, bool show_prefix) +{ +#include "trace/beauty/generated/mount_flags_array.c" + static DEFINE_STRARRAY(mount_flags, "MS_"); + + return strarray__scnprintf_flags(&strarray__mount_flags, bf, size, show_prefix, flags); +} + +unsigned long syscall_arg__mask_val_mount_flags(struct syscall_arg *arg __maybe_unused, unsigned long flags) +{ + // do_mount in fs/namespace.c: + /* + * Pre-0.97 versions of mount() didn't have a flags word. When the + * flags word was introduced its top half was required to have the + * magic value 0xC0ED, and this remained so until 2.4.0-test9. + * Therefore, if this magic number is present, it carries no + * information and must be discarded. + */ + if ((flags & MS_MGC_MSK) == MS_MGC_VAL) + flags &= ~MS_MGC_MSK; + + return flags; +} + +size_t syscall_arg__scnprintf_mount_flags(char *bf, size_t size, struct syscall_arg *arg) +{ + unsigned long flags = arg->val; + + return mount__scnprintf_flags(flags, bf, size, arg->show_string_prefix); +} -- cgit v1.2.3