tools/perf/trace/beauty/msg_flags.c

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

File Facts

System
Linux kernel
Corpus path
tools/perf/trace/beauty/msg_flags.c
Extension
.c
Size
1749 bytes
Lines
77
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 <sys/types.h>
#include <sys/socket.h>

#ifndef MSG_PROBE
#define MSG_PROBE		     0x10
#endif
#ifndef MSG_WAITFORONE
#define MSG_WAITFORONE		   0x10000
#endif
#ifndef MSG_BATCH
#define MSG_BATCH		   0x40000
#endif
#ifndef MSG_SOCK_DEVMEM
#define MSG_SOCK_DEVMEM		 0x2000000
#endif
#ifndef MSG_ZEROCOPY
#define MSG_ZEROCOPY		 0x4000000
#endif
#ifndef MSG_SPLICE_PAGES
#define MSG_SPLICE_PAGES	0x8000000
#endif
#ifndef MSG_FASTOPEN
#define MSG_FASTOPEN		0x20000000
#endif
#ifndef MSG_CMSG_CLOEXEC
# define MSG_CMSG_CLOEXEC	0x40000000
#endif

static size_t syscall_arg__scnprintf_msg_flags(char *bf, size_t size,
					       struct syscall_arg *arg)
{
	bool show_prefix = arg->show_string_prefix;
	const char *prefix = "MSG_";
	int printed = 0, flags = arg->val;

	if (flags == 0)
		return scnprintf(bf, size, "NONE");
#define	P_MSG_FLAG(n) \
	if (flags & MSG_##n) { \
		printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
		flags &= ~MSG_##n; \
	}

	P_MSG_FLAG(OOB);
	P_MSG_FLAG(PEEK);
	P_MSG_FLAG(DONTROUTE);
	P_MSG_FLAG(CTRUNC);
	P_MSG_FLAG(PROBE);
	P_MSG_FLAG(TRUNC);
	P_MSG_FLAG(DONTWAIT);
	P_MSG_FLAG(EOR);
	P_MSG_FLAG(WAITALL);
	P_MSG_FLAG(FIN);
	P_MSG_FLAG(SYN);
	P_MSG_FLAG(CONFIRM);
	P_MSG_FLAG(RST);
	P_MSG_FLAG(ERRQUEUE);
	P_MSG_FLAG(NOSIGNAL);
	P_MSG_FLAG(MORE);
	P_MSG_FLAG(WAITFORONE);
	P_MSG_FLAG(BATCH);
	P_MSG_FLAG(SOCK_DEVMEM);
	P_MSG_FLAG(ZEROCOPY);
	P_MSG_FLAG(SPLICE_PAGES);
	P_MSG_FLAG(FASTOPEN);
	P_MSG_FLAG(CMSG_CLOEXEC);
#undef P_MSG_FLAG

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

	return printed;
}

#define SCA_MSG_FLAGS syscall_arg__scnprintf_msg_flags

Annotation

Implementation Notes