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authorJoe Damato <jdamato@fastly.com>2024-05-29 07:23:50 +0000
committerWaldemar Brodkorb <wbx@openadk.org>2024-05-31 09:14:19 +0200
commit8bb33a2e1f2baec2078581d77e181f1ead5f51aa (patch)
tree5721961d8cec967203af4d2f261c31181a9e7b2a /libc/sysdeps
parent7be734848bd619c44a3b2639ce164558534111ba (diff)
epoll.h: Add epoll ioctls
add two ioctls to get and set struct epoll_params to allow users to control epoll based busy polling of network sockets. added to uapi in commit 18e2bf0edf4dd88d9656ec92395aa47392e85b61 (Linux kernel 6.9 and newer). Signed-off-by: Joe Damato <jdamato@fastly.com>
Diffstat (limited to 'libc/sysdeps')
-rw-r--r--libc/sysdeps/linux/common/sys/epoll.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/common/sys/epoll.h b/libc/sysdeps/linux/common/sys/epoll.h
index 5551bed0d..5138d77a9 100644
--- a/libc/sysdeps/linux/common/sys/epoll.h
+++ b/libc/sysdeps/linux/common/sys/epoll.h
@@ -19,6 +19,7 @@
#define _SYS_EPOLL_H 1
#include <stdint.h>
+#include <sys/ioctl.h>
#include <sys/types.h>
/* Get __sigset_t. */
@@ -87,6 +88,19 @@ struct epoll_event
epoll_data_t data; /* User data variable */
} __EPOLL_PACKED;
+struct epoll_params
+{
+ uint32_t busy_poll_usecs;
+ uint16_t busy_poll_budget;
+ uint8_t prefer_busy_poll;
+
+ /* pad the struct to a multiple of 64bits */
+ uint8_t __pad;
+};
+
+#define EPOLL_IOC_TYPE 0x8A
+#define EPIOCSPARAMS _IOW(EPOLL_IOC_TYPE, 0x01, struct epoll_params)
+#define EPIOCGPARAMS _IOR(EPOLL_IOC_TYPE, 0x02, struct epoll_params)
__BEGIN_DECLS