[PATCH liburing v1 1/4] arch/generic: Create arch generic syscall wrappers

[Ammar Faizi <ammarfaizi2@gnuweeb.org>]

From: Alviro Iskandar Setiawan <alviro.iskandar@gnuweeb.org>

This is a preparation for refactoring the syscall wrappers.

This creates a new file src/arch/generic/syscall.h. This file
contains libc syscall wrappers for architectures that don't
have arch specific code. In the next patches, we will include
this file from src/syscall.h.

It aims to reduce the usage of #ifdef/#endif that occurs in
every function in src/syscall.h file. Also, it will make the
arch specific code structure cleaner and easier to manage.

Cc: Nugra <richiisei@gmail.com>
Signed-off-by: Alviro Iskandar Setiawan <alviro.iskandar@gnuweeb.org>
Co-authored-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
---
 src/arch/generic/syscall.h | 83 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 src/arch/generic/syscall.h

diff --git a/src/arch/generic/syscall.h b/src/arch/generic/syscall.h
new file mode 100644
index 0000000..7136290
--- /dev/null
+++ b/src/arch/generic/syscall.h
@@ -0,0 +1,83 @@
+/* SPDX-License-Identifier: MIT */
+
+#ifndef LIBURING_ARCH_GENERIC_SYSCALL_H
+#define LIBURING_ARCH_GENERIC_SYSCALL_H
+
+static inline int ____sys_io_uring_register(int fd, unsigned opcode,
+					    const void *arg, unsigned nr_args)
+{
+	int ret;
+	ret = syscall(__NR_io_uring_register, fd, opcode, arg, nr_args);
+	return (ret < 0) ? -errno : ret;
+}
+
+static inline int ____sys_io_uring_setup(unsigned entries,
+					 struct io_uring_params *p)
+{
+	int ret;
+	ret = syscall(__NR_io_uring_setup, entries, p);
+	return (ret < 0) ? -errno : ret;
+}
+
+static inline int ____sys_io_uring_enter2(int fd, unsigned to_submit,
+					  unsigned min_complete, unsigned flags,
+					  sigset_t *sig, int sz)
+{
+	int ret;
+	ret = syscall(__NR_io_uring_enter, fd, to_submit, min_complete, flags,
+		      sig, sz);
+	return (ret < 0) ? -errno : ret;
+}
+
+static inline int ____sys_io_uring_enter(int fd, unsigned to_submit,
+					 unsigned min_complete, unsigned flags,
+					 sigset_t *sig)
+{
+	return ____sys_io_uring_enter2(fd, to_submit, min_complete, flags, sig,
+				       _NSIG / 8);
+}
+
+static inline void *uring_mmap(void *addr, size_t length, int prot, int flags,
+			       int fd, off_t offset)
+{
+	void *ret;
+	ret = mmap(addr, length, prot, flags, fd, offset);
+	return (ret == MAP_FAILED) ? ERR_PTR(-errno) : ret;
+}
+
+static inline int uring_munmap(void *addr, size_t length)
+{
+	int ret;
+	ret = munmap(addr, length);
+	return (ret < 0) ? -errno : ret;
+}
+
+static inline int uring_madvise(void *addr, size_t length, int advice)
+{
+	int ret;
+	ret = madvise(addr, length, advice);
+	return (ret < 0) ? -errno : ret;
+}
+
+static inline int uring_getrlimit(int resource, struct rlimit *rlim)
+{
+	int ret;
+	ret = getrlimit(resource, rlim);
+	return (ret < 0) ? -errno : ret;
+}
+
+static inline int uring_setrlimit(int resource, const struct rlimit *rlim)
+{
+	int ret;
+	ret = setrlimit(resource, rlim);
+	return (ret < 0) ? -errno : ret;
+}
+
+static inline int uring_close(int fd)
+{
+	int ret;
+	ret = close(fd);
+	return (ret < 0) ? -errno : ret;
+}
+
+#endif /* #ifndef LIBURING_ARCH_GENERIC_SYSCALL_H */
-- 
2.32.0