linux-kernel - [PATCH 3/5] perf beauty: Introduce faccessat2 flags scnprintf routine

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Message-ID: <20240320193115.811899-4-acme@kernel.org>
Date: Wed, 20 Mar 2024 16:31:13 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ian Rogers <irogers@...gle.com>
Cc: Jiri Olsa <jolsa@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	linux-kernel@...r.kernel.org,
	linux-perf-users@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 3/5] perf beauty: Introduce faccessat2 flags scnprintf routine

From: Arnaldo Carvalho de Melo <acme@...hat.com>

The fsaccessat and fsaccessat2 now have beautifiers for its arguments.

Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Ian Rogers <irogers@...gle.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/builtin-trace.c            |  9 +++++++++
 tools/perf/trace/beauty/beauty.h      |  3 +++
 tools/perf/trace/beauty/fs_at_flags.c | 24 ++++++++++++++++++++++++
 3 files changed, 36 insertions(+)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 8417387aafa8295d..58546e8af9fcf481 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -947,6 +947,15 @@ static const struct syscall_fmt syscall_fmts[] = {
 	  .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
 	{ .name	    = "eventfd2",
 	  .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
+	{ .name     = "faccessat",
+	  .arg = { [0] = { .scnprintf = SCA_FDAT,	  /* dirfd */ },
+		   [1] = { .scnprintf = SCA_FILENAME,	  /* pathname */ },
+		   [2] = { .scnprintf = SCA_ACCMODE,	  /* mode */ }, }, },
+	{ .name     = "faccessat2",
+	  .arg = { [0] = { .scnprintf = SCA_FDAT,	  /* dirfd */ },
+		   [1] = { .scnprintf = SCA_FILENAME,	  /* pathname */ },
+		   [2] = { .scnprintf = SCA_ACCMODE,	  /* mode */ },
+		   [3] = { .scnprintf = SCA_FACCESSAT2_FLAGS, /* flags */ }, }, },
 	{ .name	    = "fchmodat",
 	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
 	{ .name	    = "fchownat",
diff --git a/tools/perf/trace/beauty/beauty.h b/tools/perf/trace/beauty/beauty.h
index c94ae8701bc65a2f..78d10d92d351f8e2 100644
--- a/tools/perf/trace/beauty/beauty.h
+++ b/tools/perf/trace/beauty/beauty.h
@@ -237,6 +237,9 @@ size_t syscall_arg__scnprintf_socket_level(char *bf, size_t size, struct syscall
 size_t syscall_arg__scnprintf_fs_at_flags(char *bf, size_t size, struct syscall_arg *arg);
 #define SCA_FS_AT_FLAGS syscall_arg__scnprintf_fs_at_flags
 
+size_t syscall_arg__scnprintf_faccessat2_flags(char *bf, size_t size, struct syscall_arg *arg);
+#define SCA_FACCESSAT2_FLAGS syscall_arg__scnprintf_faccessat2_flags
+
 size_t syscall_arg__scnprintf_statx_mask(char *bf, size_t size, struct syscall_arg *arg);
 #define SCA_STATX_MASK syscall_arg__scnprintf_statx_mask
 
diff --git a/tools/perf/trace/beauty/fs_at_flags.c b/tools/perf/trace/beauty/fs_at_flags.c
index 2a099953d9935782..c1365e8f0b96ef43 100644
--- a/tools/perf/trace/beauty/fs_at_flags.c
+++ b/tools/perf/trace/beauty/fs_at_flags.c
@@ -7,6 +7,7 @@
 
 #include "trace/beauty/beauty.h"
 #include <sys/types.h>
+#include <linux/fcntl.h>
 #include <linux/log2.h>
 
 #include "trace/beauty/generated/fs_at_flags_array.c"
@@ -24,3 +25,26 @@ size_t syscall_arg__scnprintf_fs_at_flags(char *bf, size_t size, struct syscall_
 
 	return fs_at__scnprintf_flags(flags, bf, size, show_prefix);
 }
+
+static size_t faccessat2__scnprintf_flags(unsigned long flags, char *bf, size_t size, bool show_prefix)
+{
+	int printed = 0;
+
+	// AT_EACCESS is the same as AT_REMOVEDIR, that is in fs_at_flags_array,
+	// special case it here.
+	if (flags & AT_EACCESS) {
+		flags &= ~AT_EACCESS;
+		printed += scnprintf(bf + printed, size - printed, "%sEACCESS%s",
+				     show_prefix ? strarray__fs_at_flags.prefix : "", flags ? "|" : "");
+	}
+
+	return strarray__scnprintf_flags(&strarray__fs_at_flags, bf + printed, size - printed, show_prefix, flags);
+}
+
+size_t syscall_arg__scnprintf_faccessat2_flags(char *bf, size_t size, struct syscall_arg *arg)
+{
+	bool show_prefix = arg->show_string_prefix;
+	int flags = arg->val;
+
+	return faccessat2__scnprintf_flags(flags, bf, size, show_prefix);
+}
-- 
2.44.0