tools/perf/trace/beauty/flock.c

Source file repositories/reference/linux-study-clean/tools/perf/trace/beauty/flock.c

File Facts

System
Linux kernel
Corpus path
tools/perf/trace/beauty/flock.c
Extension
.c
Size
1003 bytes
Lines
52
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: LGPL-2.1

#include "trace/beauty/beauty.h"
#include <linux/kernel.h>
#include <linux/fcntl.h>

#ifndef LOCK_MAND
#define LOCK_MAND	 32
#endif

#ifndef LOCK_READ
#define LOCK_READ	 64
#endif

#ifndef LOCK_WRITE
#define LOCK_WRITE	128
#endif

#ifndef LOCK_RW
#define LOCK_RW		192
#endif

size_t syscall_arg__scnprintf_flock(char *bf, size_t size, struct syscall_arg *arg)
{
	bool show_prefix = arg->show_string_prefix;
	const char *prefix = "LOCK_";
	int printed = 0, op = arg->val;

	if (op == 0)
		return scnprintf(bf, size, "NONE");
#define	P_CMD(cmd) \
	if ((op & LOCK_##cmd) == LOCK_##cmd) { \
		printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #cmd); \
		op &= ~LOCK_##cmd; \
	}

	P_CMD(SH);
	P_CMD(EX);
	P_CMD(NB);
	P_CMD(UN);
	P_CMD(MAND);
	P_CMD(RW);
	P_CMD(READ);
	P_CMD(WRITE);
#undef P_OP

	if (op)
		printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", op);

	return printed;
}

Annotation

Implementation Notes