73d141adce
# trace -e mount mount -o ro -t debugfs nodev /mnt
0.000 ( 1.040 ms): mount/27235 mount(dev_name: 0x5601cc8c64e0, dir_name: 0x5601cc8c6500, type: 0x5601cc8c6480, flags: RDONLY) = 0
# trace -e mount mount -o remount,relatime -t debugfs nodev /mnt
0.000 ( 2.946 ms): mount/27262 mount(dev_name: 0x55f4a73d64e0, dir_name: 0x55f4a73d6500, type: 0x55f4a73d6480, flags: REMOUNT|RELATIME) = 0
# trace -e mount mount -o remount,strictatime -t debugfs nodev /mnt
0.000 ( 2.934 ms): mount/27265 mount(dev_name: 0x5617f71d94e0, dir_name: 0x5617f71d9500, type: 0x5617f71d9480, flags: REMOUNT|STRICTATIME) = 0
# trace -e mount mount -o remount,suid,silent -t debugfs nodev /mnt
0.000 ( 0.049 ms): mount/27273 mount(dev_name: 0x55ad65df24e0, dir_name: 0x55ad65df2500, type: 0x55ad65df2480, flags: REMOUNT|SILENT) = 0
# trace -e mount mount -o remount,rw,sync,lazytime -t debugfs nodev /mnt
0.000 ( 2.684 ms): mount/27281 mount(dev_name: 0x561216055530, dir_name: 0x561216055550, type: 0x561216055510, flags: SYNCHRONOUS|REMOUNT|LAZYTIME) = 0
# trace -e mount mount -o remount,dirsync -t debugfs nodev /mnt
0.000 ( 3.512 ms): mount/27314 mount(dev_name: 0x55c4e7188480, dir_name: 0x55c4e7188530, type: 0x55c4e71884a0, flags: REMOUNT|DIRSYNC, data: 0x55c4e71884e0) = 0
#
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Benjamin Peterson <benjamin@python.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-i5ncao73c0bd02qprgrq6wb9@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
// SPDX-License-Identifier: LGPL-2.1
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/*
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* trace/beauty/mount_flags.c
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*
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* Copyright (C) 2018, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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*/
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#include "trace/beauty/beauty.h"
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#include <linux/compiler.h>
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#include <linux/kernel.h>
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#include <linux/log2.h>
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#include <sys/mount.h>
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static size_t mount__scnprintf_flags(unsigned long flags, char *bf, size_t size)
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{
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#include "trace/beauty/generated/mount_flags_array.c"
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static DEFINE_STRARRAY(mount_flags);
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return strarray__scnprintf_flags(&strarray__mount_flags, bf, size, flags);
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}
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unsigned long syscall_arg__mask_val_mount_flags(struct syscall_arg *arg __maybe_unused, unsigned long flags)
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{
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// do_mount in fs/namespace.c:
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/*
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* Pre-0.97 versions of mount() didn't have a flags word. When the
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* flags word was introduced its top half was required to have the
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* magic value 0xC0ED, and this remained so until 2.4.0-test9.
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* Therefore, if this magic number is present, it carries no
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* information and must be discarded.
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*/
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if ((flags & MS_MGC_MSK) == MS_MGC_VAL)
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flags &= ~MS_MGC_MSK;
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return flags;
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}
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size_t syscall_arg__scnprintf_mount_flags(char *bf, size_t size, struct syscall_arg *arg)
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{
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unsigned long flags = arg->val;
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return mount__scnprintf_flags(flags, bf, size);
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}
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