1 // SPDX-License-Identifier: LGPL-2.1
2 #include <sched.h>
3 
4 /*
5  * Not defined anywhere else, probably, just to make sure we
6  * catch future flags
7  */
8 #define SCHED_POLICY_MASK 0xff
9 
10 #ifndef SCHED_DEADLINE
11 #define SCHED_DEADLINE 6
12 #endif
13 #ifndef SCHED_RESET_ON_FORK
14 #define SCHED_RESET_ON_FORK 0x40000000
15 #endif
16 
17 static size_t syscall_arg__scnprintf_sched_policy(char *bf, size_t size,
18 						  struct syscall_arg *arg)
19 {
20 	bool show_prefix = arg->show_string_prefix;
21 	const char *prefix = "SCHED_";
22 	const char *policies[] = {
23 		"NORMAL", "FIFO", "RR", "BATCH", "ISO", "IDLE", "DEADLINE",
24 	};
25 	size_t printed;
26 	int policy = arg->val,
27 	    flags = policy & ~SCHED_POLICY_MASK;
28 
29 	policy &= SCHED_POLICY_MASK;
30 	if (policy <= SCHED_DEADLINE)
31 		printed = scnprintf(bf, size, "%s%s", show_prefix ? prefix : "", policies[policy]);
32 	else
33 		printed = scnprintf(bf, size, "%#x", policy);
34 
35 #define	P_POLICY_FLAG(n) \
36 	if (flags & SCHED_##n) { \
37 		printed += scnprintf(bf + printed, size - printed, "|%s%s", show_prefix ? prefix : "",  #n); \
38 		flags &= ~SCHED_##n; \
39 	}
40 
41 	P_POLICY_FLAG(RESET_ON_FORK);
42 #undef P_POLICY_FLAG
43 
44 	if (flags)
45 		printed += scnprintf(bf + printed, size - printed, "|%#x", flags);
46 
47 	return printed;
48 }
49 
50 #define SCA_SCHED_POLICY syscall_arg__scnprintf_sched_policy
51