evl: sanitize uapi/ headers (enable CONFIG_UAPI_HEADER_TEST)

Ensure that CONFIG_UAPI_HEADER_TEST passes with the EVL uapi/
headers. This involves:

- removing all direct mention of the uapi/ root in include directives
  from uapi/ headers.

- rename the header containing the ABI definitions for each
  uapi/evl/<element>.h to uapi/evl/<element>-abi.h, so that we can
  include it unambiguously from any uapi/ header as
  evl/<element>-abi.h, solving the name clash with the associated
  kernel header.

- moving a few bits to the relevant implementation file (kernel and/or
  libevl) whenever possible, dropping the requirement for maintaining
  an uapi header for it (e.g. uapi/evl/mutex.h).

At this chance, remove some unnecessary include directives from a few
implementation files as well.

Signed-off-by: Philippe Gerum <[email protected]>

include/evl/clock.h

@@ -14,7 +14,8 @@
 #include <linux/cpumask.h>
 #include <evl/list.h>
 #include <evl/factory.h>
-#include <uapi/evl/clock.h>
+#include <uapi/evl/types.h>
+#include <uapi/evl/clock-abi.h>
 
 #define ONE_BILLION  1000000000
 

include/evl/control.h

@@ -10,6 +10,8 @@
 #include <linux/atomic.h>
 #include <linux/notifier.h>
 #include <evl/factory.h>
+#include <uapi/evl/sched-abi.h>
+#include <uapi/evl/control-abi.h>
 
 enum evl_run_states {
 	EVL_STATE_DISABLED,

include/evl/factory.h

@@ -23,7 +23,7 @@
 #include <evl/assert.h>
 #include <evl/file.h>
 #include <uapi/evl/types.h>
-#include <uapi/evl/factory.h>
+#include <uapi/evl/factory-abi.h>
 
 #define element_of(__filp, __type)					\
 	({								\

include/evl/monitor.h

@@ -7,9 +7,8 @@
 #ifndef _EVL_MONITOR_H
 #define _EVL_MONITOR_H
 
-#include <evl/factory.h>
 #include <evl/thread.h>
-#include <evl/sched.h>
+#include <uapi/evl/monitor-abi.h>
 
 int evl_signal_monitor_targeted(struct evl_thread *target,
 				int monfd);

include/evl/mutex.h

@@ -15,7 +15,6 @@
 #include <evl/timer.h>
 #include <evl/wait.h>
 #include <evl/sched.h>
-#include <uapi/evl/mutex.h>
 
 struct evl_clock;
 struct evl_thread;
@@ -93,6 +92,12 @@ bool evl_requeue_mutex_wait(struct evl_wait_channel *wchan,
 
 void evl_drop_current_ownership(void);
 
+static inline bool
+evl_is_mutex_owner(atomic_t *fastlock, fundle_t ownerh)
+{
+	return evl_get_index(atomic_read(fastlock)) == ownerh;
+}
+
 struct evl_kmutex {
 	struct evl_mutex mutex;
 	atomic_t fastlock;

include/evl/net/socket.h

@@ -16,7 +16,9 @@
 #include <evl/file.h>
 #include <evl/poll.h>
 #include <evl/crossing.h>
-#include <uapi/evl/net/socket.h>
+#include <uapi/evl/types.h>
+#include <uapi/evl/fcntl.h>
+#include <uapi/evl/net/socket-abi.h>
 
 struct evl_socket;
 struct net;

include/evl/observable.h

@@ -14,7 +14,8 @@
 #include <evl/factory.h>
 #include <evl/wait.h>
 #include <evl/poll.h>
-#include <uapi/evl/observable.h>
+#include <uapi/evl/types.h>
+#include <uapi/evl/observable-abi.h>
 
 struct file;
 

include/evl/poll.h

@@ -14,7 +14,8 @@
 #include <linux/poll.h>
 #include <evl/wait.h>
 #include <evl/factory.h>
-#include <uapi/evl/poll.h>
+#include <uapi/evl/types.h>
+#include <uapi/evl/poll-abi.h>
 
 struct file;
 

include/evl/thread.h

@@ -22,9 +22,9 @@
 #include <evl/sched/param.h>
 #include <evl/factory.h>
 #include <evl/assert.h>
-#include <uapi/evl/thread.h>
+#include <uapi/evl/thread-abi.h>
+#include <uapi/evl/sched-abi.h>
 #include <uapi/evl/signal.h>
-#include <uapi/evl/sched.h>
 #include <asm/evl/thread.h>
 
 /* All bits which may cause an EVL thread to block in oob context. */

include/uapi/evl/clock.h → include/uapi/evl/clock-abi.h

@@ -4,10 +4,10 @@
  * Copyright (C) 2018 Philippe Gerum <[email protected]>
  */
 
-#ifndef _EVL_UAPI_CLOCK_H
-#define _EVL_UAPI_CLOCK_H
+#ifndef _EVL_UAPI_CLOCK_ABI_H
+#define _EVL_UAPI_CLOCK_ABI_H
 
-#include <uapi/evl/types.h>
+#include <linux/types.h>
 
 #define EVL_CLOCK_MONOTONIC_DEV		"monotonic"
 #define EVL_CLOCK_REALTIME_DEV		"realtime"
@@ -34,4 +34,4 @@ struct evl_timerfd_setreq {
 #define EVL_TFDIOC_SET	 _IOWR(EVL_TIMERFD_IOCBASE, 0, struct evl_timerfd_setreq)
 #define EVL_TFDIOC_GET	 _IOR(EVL_TIMERFD_IOCBASE, 1, struct __evl_itimerspec)
 
-#endif /* !_EVL_UAPI_CLOCK_H */
+#endif /* !_EVL_UAPI_CLOCK_ABI_H */

include/uapi/evl/control.h → include/uapi/evl/control-abi.h

@@ -4,11 +4,10 @@
  * Copyright (C) 2018 Philippe Gerum  <[email protected]>
  */
 
-#ifndef _EVL_UAPI_CONTROL_H
-#define _EVL_UAPI_CONTROL_H
+#ifndef _EVL_UAPI_CONTROL_ABI_H
+#define _EVL_UAPI_CONTROL_ABI_H
 
 #include <linux/types.h>
-#include <uapi/evl/sched.h>
 
 /* Earliest ABI level we support. */
 #define EVL_ABI_BASE   23
@@ -40,4 +39,4 @@ struct evl_cpu_state {
 #define EVL_CTLIOC_SCHEDCTL		_IOWR(EVL_CONTROL_IOCBASE, 1, struct evl_sched_ctlreq)
 #define EVL_CTLIOC_GET_CPUSTATE		_IOR(EVL_CONTROL_IOCBASE, 2, struct evl_cpu_state)
 
-#endif /* !_EVL_UAPI_CONTROL_H */
+#endif /* !_EVL_UAPI_CONTROL_ABI_H */

include/uapi/evl/factory.h → include/uapi/evl/factory-abi.h

@@ -4,8 +4,8 @@
  * Copyright (C) 2018 Philippe Gerum <[email protected]>
  */
 
-#ifndef _EVL_UAPI_FACTORY_H
-#define _EVL_UAPI_FACTORY_H
+#ifndef _EVL_UAPI_FACTORY_ABI_H
+#define _EVL_UAPI_FACTORY_ABI_H
 
 #include <linux/types.h>
 
@@ -45,4 +45,4 @@ struct evl_clone_req {
 
 #define EVL_IOC_CLONE	_IOWR(EVL_FACTORY_IOCBASE, 0, struct evl_clone_req)
 
-#endif /* !_EVL_UAPI_FACTORY_H */
+#endif /* !_EVL_UAPI_FACTORY_ABI_H */

include/uapi/evl/monitor.h → include/uapi/evl/monitor-abi.h

@@ -4,12 +4,10 @@
  * Copyright (C) 2018 Philippe Gerum  <[email protected]>
  */
 
-#ifndef _EVL_UAPI_MONITOR_H
-#define _EVL_UAPI_MONITOR_H
+#ifndef _EVL_UAPI_MONITOR_ABI_H
+#define _EVL_UAPI_MONITOR_ABI_H
 
-#include <linux/types.h>
-#include <uapi/evl/types.h>
-#include <uapi/evl/factory.h>
+#include <evl/factory-abi.h>
 
 #define EVL_MONITOR_DEV		"monitor"
 
@@ -39,14 +37,14 @@ struct evl_monitor_state {
 	__u32 flags;
 	union {
 		struct {
-			atomic_t owner;
+			__u32 owner; /* atomic_t */
 			__u32 ceiling;
 			__u32 recursive: 1,
 				nesting : 31;
 		} gate;
 		struct {
-			atomic_t value;
-			atomic_t pollrefs;
+			__u32 value; /* atomic_t */
+			__u32 pollrefs; /* atomic_t */
 			__u32 gate_offset;
 		} event;
 	} u;
@@ -87,4 +85,4 @@ struct evl_monitor_binding {
 #define EVL_MONIOC_TRYWAIT		_IOWR(EVL_MONITOR_IOCBASE, 9, struct evl_monitor_trywaitreq)
 #define EVL_MONIOC_TRYWAIT_EXACT	_IOWR(EVL_MONITOR_IOCBASE, 10, struct evl_monitor_trywaitreq)
 
-#endif /* !_EVL_UAPI_MONITOR_H */
+#endif /* !_EVL_UAPI_MONITOR_ABI_H */

include/uapi/evl/net/socket.h → include/uapi/evl/net/socket-abi.h

@@ -4,11 +4,10 @@
  * Copyright (C) 2020 Philippe Gerum  <[email protected]>
  */
 
-#ifndef _EVL_UAPI_NET_SOCKET_H
-#define _EVL_UAPI_NET_SOCKET_H
+#ifndef _EVL_UAPI_NET_SOCKET_ABI_H
+#define _EVL_UAPI_NET_SOCKET_ABI_H
 
-#include <uapi/evl/types.h>
-#include <uapi/evl/fcntl.h>
+#include <evl/types.h>
 
 #define AF_OOB		46	/* Out-of-band domain sockets */
 
@@ -42,4 +41,4 @@ struct evl_netdev_activation {
 #define EVL_SOCKIOC_SETRECVSZ	_IOW(EVL_SOCKET_IOCBASE, 6, int)
 #define EVL_SOCKIOC_SETSENDSZ	_IOW(EVL_SOCKET_IOCBASE, 7, int)
 
-#endif /* !_EVL_UAPI_NET_SOCKET_H */
+#endif /* !_EVL_UAPI_NET_SOCKET_ABI_H */

include/uapi/evl/observable.h → include/uapi/evl/observable-abi.h

@@ -4,10 +4,10 @@
  * Copyright (C) 2020 Philippe Gerum  <[email protected]>
  */
 
-#ifndef _EVL_UAPI_OBSERVABLE_H
-#define _EVL_UAPI_OBSERVABLE_H
+#ifndef _EVL_UAPI_OBSERVABLE_ABI_H
+#define _EVL_UAPI_OBSERVABLE_ABI_H
 
-#include <uapi/evl/types.h>
+#include <evl/types.h>
 
 #define EVL_OBSERVABLE_DEV	"observable"
 
@@ -42,4 +42,4 @@ struct __evl_notification {
 #define EVL_OBSIOC_SUBSCRIBE		_IOW(EVL_OBSERVABLE_IOCBASE, 0, struct evl_subscription)
 #define EVL_OBSIOC_UNSUBSCRIBE		_IO(EVL_OBSERVABLE_IOCBASE, 1)
 
-#endif /* !_EVL_UAPI_OBSERVABLE_H */
+#endif /* !_EVL_UAPI_OBSERVABLE_ABI_H */

include/uapi/evl/poll.h → include/uapi/evl/poll-abi.h

@@ -4,10 +4,10 @@
  * Copyright (C) 2018 Philippe Gerum  <[email protected]>
  */
 
-#ifndef _EVL_UAPI_POLL_H
-#define _EVL_UAPI_POLL_H
+#ifndef _EVL_UAPI_POLL_ABI_H
+#define _EVL_UAPI_POLL_ABI_H
 
-#include <uapi/evl/types.h>
+#include <evl/types.h>
 
 #define EVL_POLL_DEV		"poll"
 
@@ -39,4 +39,4 @@ struct evl_poll_waitreq {
 #define EVL_POLIOC_CTL		_IOW(EVL_POLL_IOCBASE, 0, struct evl_poll_ctlreq)
 #define EVL_POLIOC_WAIT		_IOWR(EVL_POLL_IOCBASE, 1, struct evl_poll_waitreq)
 
-#endif /* !_EVL_UAPI_POLL_H */
+#endif /* !_EVL_UAPI_POLL_ABI_H */

include/uapi/evl/proxy.h → include/uapi/evl/proxy-abi.h

@@ -4,8 +4,8 @@
  * Copyright (C) 2019 Philippe Gerum  <[email protected]>
  */
 
-#ifndef _EVL_UAPI_PROXY_H
-#define _EVL_UAPI_PROXY_H
+#ifndef _EVL_UAPI_PROXY_ABI_H
+#define _EVL_UAPI_PROXY_ABI_H
 
 #include <linux/types.h>
 
@@ -17,4 +17,4 @@ struct evl_proxy_attrs {
 	__u32 granularity;
 };
 
-#endif /* !_EVL_UAPI_PROXY_H */
+#endif /* !_EVL_UAPI_PROXY_ABI_H */

include/uapi/evl/sched.h → include/uapi/evl/sched-abi.h

@@ -5,10 +5,10 @@
  * Copyright (C) 2005, 2018 Philippe Gerum  <[email protected]>
  */
 
-#ifndef _EVL_UAPI_SCHED_H
-#define _EVL_UAPI_SCHED_H
+#ifndef _EVL_UAPI_SCHED_ABI_H
+#define _EVL_UAPI_SCHED_ABI_H
 
-#include <uapi/evl/types.h>
+#include <evl/types.h>
 
 #define EVL_CPU_OOB      (1 << 0)
 #define EVL_CPU_ISOL     (1 << 1)
@@ -130,4 +130,4 @@ struct evl_sched_ctlreq {
 	__u64 info_ptr;	 /* (union evl_sched_ctlinfo __user *info) */
 };
 
-#endif /* !_EVL_UAPI_SCHED_H */
+#endif /* !_EVL_UAPI_SCHED_ABI_H */

include/uapi/evl/syscall.h → include/uapi/evl/syscall-abi.h

@@ -4,13 +4,13 @@
  * Copyright (C) 2018 Philippe Gerum <[email protected]>
  */
 
-#ifndef _EVL_UAPI_SYSCALL_H
-#define _EVL_UAPI_SYSCALL_H
+#ifndef _EVL_UAPI_SYSCALL_ABI_H
+#define _EVL_UAPI_SYSCALL_ABI_H
 
 #define sys_evl_read	0	/* oob_read() */
 #define sys_evl_write	1	/* oob_write() */
 #define sys_evl_ioctl	2	/* oob_ioctl() */
 
 #define NR_EVL_SYSCALLS 3
 
-#endif /* !_EVL_UAPI_SYSCALL_H */
+#endif /* !_EVL_UAPI_SYSCALL_ABI_H */

include/uapi/evl/thread.h → include/uapi/evl/thread-abi.h

@@ -5,11 +5,10 @@
  * Copyright (C) 2005, 2018 Philippe Gerum <[email protected]>
  */
 
-#ifndef _EVL_UAPI_THREAD_H
-#define _EVL_UAPI_THREAD_H
+#ifndef _EVL_UAPI_THREAD_ABI_H
+#define _EVL_UAPI_THREAD_ABI_H
 
-#include <linux/types.h>
-#include <uapi/evl/sched.h>
+#include <evl/sched-abi.h>
 
 #define EVL_THREAD_DEV		"thread"
 
@@ -131,4 +130,4 @@ struct evl_thread_state {
 #define EVL_THRIOC_DEMOTE		_IO(EVL_THREAD_IOCBASE, 11)
 #define EVL_THRIOC_YIELD		_IO(EVL_THREAD_IOCBASE, 12)
 
-#endif /* !_EVL_UAPI_THREAD_H */
+#endif /* !_EVL_UAPI_THREAD_ABI_H */