diff options
author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-05-21 16:34:03 -0300 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-05-28 18:37:43 -0300 |
commit | f6af095668b7799a7514378824dcc74869df3994 (patch) | |
tree | c54e5cbf83ab72ab997243b613508d619ef12069 /tools | |
parent | f5b91dbba1a51d30a3fe78a5c6096392fa99471e (diff) |
perf trace: Beautify 'fsmount' arguments
Use existing beautifiers for the first arg, fd, assigned using the
heuristic that looks for syscall arg names and associates SCA_FD with
'fd' named argumes, and wire up the recently introduced fsmount
attr_flags table generator.
Now it should be possible to just use:
perf trace -e fsmount
As root and see all fsmount syscalls with its args beautified.
# cat sys_fsmount.c
#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <unistd.h>
#include <sys/syscall.h> /* For SYS_xxx definitions */
#define __NR_fsmount 432
#define MOUNT_ATTR_RDONLY 0x00000001 /* Mount read-only */
#define MOUNT_ATTR_NOSUID 0x00000002 /* Ignore suid and sgid bits */
#define MOUNT_ATTR_NODEV 0x00000004 /* Disallow access to device special files */
#define MOUNT_ATTR_NOEXEC 0x00000008 /* Disallow program execution */
#define MOUNT_ATTR__ATIME 0x00000070 /* Setting on how atime should be updated */
#define MOUNT_ATTR_RELATIME 0x00000000 /* - Update atime relative to mtime/ctime. */
#define MOUNT_ATTR_NOATIME 0x00000010 /* - Do not update access times. */
#define MOUNT_ATTR_STRICTATIME 0x00000020 /* - Always perform atime updates */
#define MOUNT_ATTR_NODIRATIME 0x00000080 /* Do not update directory access times */
static inline int sys_fsmount(int fs_fd, int flags, int attr_flags)
{
syscall(__NR_fsmount, fs_fd, flags, attr_flags);
}
int main(int argc, char *argv[])
{
int attr_flags = 0, fs_fd = 0;
sys_fsmount(fs_fd++, 0, attr_flags);
attr_flags |= MOUNT_ATTR_RDONLY;
sys_fsmount(fs_fd++, 1, attr_flags);
attr_flags |= MOUNT_ATTR_NOSUID;
sys_fsmount(fs_fd++, 0, attr_flags);
attr_flags |= MOUNT_ATTR_NODEV;
sys_fsmount(fs_fd++, 1, attr_flags);
attr_flags |= MOUNT_ATTR_NOEXEC;
sys_fsmount(fs_fd++, 0, attr_flags);
attr_flags |= MOUNT_ATTR_NOATIME;
sys_fsmount(fs_fd++, 1, attr_flags);
attr_flags |= MOUNT_ATTR_STRICTATIME;
sys_fsmount(fs_fd++, 0, attr_flags);
attr_flags |= MOUNT_ATTR_NODIRATIME;
sys_fsmount(fs_fd++, 0, attr_flags);
return 0;
}
#
# perf trace -e fsmount ./sys_fsmount
fsmount(0, 0, MOUNT_ATTR_RELATIME) = -1 EINVAL (Invalid argument)
fsmount(1, FSMOUNT_CLOEXEC, MOUNT_ATTR_RDONLY|MOUNT_ATTR_RELATIME) = -1 EINVAL (Invalid argument)
fsmount(2, 0, MOUNT_ATTR_RDONLY|MOUNT_ATTR_NOSUID|MOUNT_ATTR_RELATIME) = -1 EINVAL (Invalid argument)
fsmount(3, FSMOUNT_CLOEXEC, MOUNT_ATTR_RDONLY|MOUNT_ATTR_NOSUID|MOUNT_ATTR_NODEV|MOUNT_ATTR_RELATIME) = -1 EBADF (Bad file descriptor)
fsmount(4, 0, MOUNT_ATTR_RDONLY|MOUNT_ATTR_NOSUID|MOUNT_ATTR_NODEV|MOUNT_ATTR_NOEXEC|MOUNT_ATTR_RELATIME) = -1 EBADF (Bad file descriptor)
fsmount(5, FSMOUNT_CLOEXEC, MOUNT_ATTR_RDONLY|MOUNT_ATTR_NOSUID|MOUNT_ATTR_NODEV|MOUNT_ATTR_NOEXEC|MOUNT_ATTR_NOATIME) = -1 EBADF (Bad file descriptor)
fsmount(6, 0, MOUNT_ATTR_RDONLY|MOUNT_ATTR_NOSUID|MOUNT_ATTR_NODEV|MOUNT_ATTR_NOEXEC|MOUNT_ATTR_NOATIME|MOUNT_ATTR_STRICTATIME) = -1 EINVAL (Invalid argument)
fsmount(7, 0, MOUNT_ATTR_RDONLY|MOUNT_ATTR_NOSUID|MOUNT_ATTR_NODEV|MOUNT_ATTR_NOEXEC|MOUNT_ATTR_NOATIME|MOUNT_ATTR_STRICTATIME|MOUNT_ATTR_NODIRATIME) = -1 EINVAL (Invalid argument)
#
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-w71uge0sfo6ns9uclhwtthca@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r-- | tools/perf/Makefile.perf | 8 | ||||
-rw-r--r-- | tools/perf/builtin-trace.c | 12 | ||||
-rw-r--r-- | tools/perf/trace/beauty/Build | 1 | ||||
-rw-r--r-- | tools/perf/trace/beauty/beauty.h | 3 | ||||
-rw-r--r-- | tools/perf/trace/beauty/fsmount.c | 34 |
5 files changed, 58 insertions, 0 deletions
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index 22e92a9ee871..326ca5d6a7ef 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -419,6 +419,12 @@ fadvise_advice_tbl := $(srctree)/tools/perf/trace/beauty/fadvise.sh $(fadvise_advice_array): $(linux_uapi_dir)/in.h $(fadvise_advice_tbl) $(Q)$(SHELL) '$(fadvise_advice_tbl)' $(linux_uapi_dir) > $@ +fsmount_arrays := $(beauty_outdir)/fsmount_arrays.c +fsmount_tbls := $(srctree)/tools/perf/trace/beauty/fsmount.sh + +$(fsmount_arrays): $(linux_uapi_dir)/fs.h $(fsmount_tbls) + $(Q)$(SHELL) '$(fsmount_tbls)' $(linux_uapi_dir) > $@ + fspick_arrays := $(beauty_outdir)/fspick_arrays.c fspick_tbls := $(srctree)/tools/perf/trace/beauty/fspick.sh @@ -647,6 +653,7 @@ build-dir = $(if $(__build-dir),$(__build-dir),.) prepare: $(OUTPUT)PERF-VERSION-FILE $(OUTPUT)common-cmds.h archheaders $(drm_ioctl_array) \ $(fadvise_advice_array) \ $(fsconfig_arrays) \ + $(fsmount_arrays) \ $(fspick_arrays) \ $(pkey_alloc_access_rights_array) \ $(sndrv_pcm_ioctl_array) \ @@ -944,6 +951,7 @@ clean:: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean $(LIBBPF)-clean $(LIBSUBCMD)-clea $(OUTPUT)pmu-events/pmu-events.c \ $(OUTPUT)$(fadvise_advice_array) \ $(OUTPUT)$(fsconfig_arrays) \ + $(OUTPUT)$(fsmount_arrays) \ $(OUTPUT)$(fspick_arrays) \ $(OUTPUT)$(madvise_behavior_array) \ $(OUTPUT)$(mmap_flags_array) \ diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 16bb8c04c689..3a2ab68a8b85 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -487,6 +487,11 @@ static const char *bpf_cmd[] = { }; static DEFINE_STRARRAY(bpf_cmd, "BPF_"); +static const char *fsmount_flags[] = { + [1] = "CLOEXEC", +}; +static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_"); + #include "trace/beauty/generated/fsconfig_arrays.c" static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_"); @@ -651,6 +656,10 @@ static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size, { .scnprintf = SCA_STRARRAY, \ .parm = &strarray__##array, } +#define STRARRAY_FLAGS(name, array) \ + { .scnprintf = SCA_STRARRAY_FLAGS, \ + .parm = &strarray__##array, } + #include "trace/beauty/arch_errno_names.c" #include "trace/beauty/eventfd.c" #include "trace/beauty/futex_op.c" @@ -724,6 +733,9 @@ static struct syscall_fmt { .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, }, { .name = "fsconfig", .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, }, + { .name = "fsmount", + .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags), + [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, }, { .name = "fspick", .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, [1] = { .scnprintf = SCA_FILENAME, /* path */ }, diff --git a/tools/perf/trace/beauty/Build b/tools/perf/trace/beauty/Build index c2d38b2b606b..338c61b8ed22 100644 --- a/tools/perf/trace/beauty/Build +++ b/tools/perf/trace/beauty/Build @@ -1,6 +1,7 @@ perf-y += clone.o perf-y += fcntl.o perf-y += flock.o +perf-y += fsmount.o perf-y += fspick.o ifeq ($(SRCARCH),$(filter $(SRCARCH),x86)) perf-y += ioctl.o diff --git a/tools/perf/trace/beauty/beauty.h b/tools/perf/trace/beauty/beauty.h index ad874e0beba5..9385d1cb121a 100644 --- a/tools/perf/trace/beauty/beauty.h +++ b/tools/perf/trace/beauty/beauty.h @@ -144,6 +144,9 @@ size_t syscall_arg__scnprintf_fcntl_arg(char *bf, size_t size, struct syscall_ar size_t syscall_arg__scnprintf_flock(char *bf, size_t size, struct syscall_arg *arg); #define SCA_FLOCK syscall_arg__scnprintf_flock +size_t syscall_arg__scnprintf_fsmount_attr_flags(char *bf, size_t size, struct syscall_arg *arg); +#define SCA_FSMOUNT_ATTR_FLAGS syscall_arg__scnprintf_fsmount_attr_flags + size_t syscall_arg__scnprintf_fspick_flags(char *bf, size_t size, struct syscall_arg *arg); #define SCA_FSPICK_FLAGS syscall_arg__scnprintf_fspick_flags diff --git a/tools/perf/trace/beauty/fsmount.c b/tools/perf/trace/beauty/fsmount.c new file mode 100644 index 000000000000..30c8c082a3c3 --- /dev/null +++ b/tools/perf/trace/beauty/fsmount.c @@ -0,0 +1,34 @@ +// SPDX-License-Identifier: LGPL-2.1 +/* + * trace/beauty/fsmount.c + * + * Copyright (C) 2019, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> + */ + +#include "trace/beauty/beauty.h" +#include <linux/log2.h> +#include <uapi/linux/mount.h> + +static size_t fsmount__scnprintf_attr_flags(unsigned long flags, char *bf, size_t size, bool show_prefix) +{ +#include "trace/beauty/generated/fsmount_arrays.c" + static DEFINE_STRARRAY(fsmount_attr_flags, "MOUNT_ATTR_"); + size_t printed = 0; + + if ((flags & ~MOUNT_ATTR__ATIME) != 0) + printed += strarray__scnprintf_flags(&strarray__fsmount_attr_flags, bf, size, show_prefix, flags); + + if ((flags & MOUNT_ATTR__ATIME) == MOUNT_ATTR_RELATIME) { + printed += scnprintf(bf + printed, size - printed, "%s%s%s", + printed ? "|" : "", show_prefix ? "MOUNT_ATTR_" : "", "RELATIME"); + } + + return printed; +} + +size_t syscall_arg__scnprintf_fsmount_attr_flags(char *bf, size_t size, struct syscall_arg *arg) +{ + unsigned long flags = arg->val; + + return fsmount__scnprintf_attr_flags(flags, bf, size, arg->show_string_prefix); +} |