From: Andrei Tatar <andrei@unikraft.io>
Date: Fri, 24 Nov 2023 15:46:14 +0000 (+0100)
Subject: lib/posix-timerfd: Add syscall interface
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=refs%2Fpull%2F1179%2Fhead;p=unikraft%2Funikraft.git

lib/posix-timerfd: Add syscall interface

This change implements the syscall interface to posix-timerfd, adding
the following syscalls to Unikraft:
- timerfd_create
- timerfd_settime
- timerfd_gettime

Signed-off-by: Andrei Tatar <andrei@unikraft.io>
---

diff --git a/lib/posix-timerfd/Makefile.uk b/lib/posix-timerfd/Makefile.uk
index ea68dc070..e5f010ce4 100644
--- a/lib/posix-timerfd/Makefile.uk
+++ b/lib/posix-timerfd/Makefile.uk
@@ -4,3 +4,7 @@ CINCLUDES-$(CONFIG_LIBPOSIX_TIMERFD) += -I$(LIBPOSIX_TIMERFD_BASE)/include
 CXXINCLUDES-$(CONFIG_LIBPOSIX_TIMERFD) += -I$(LIBPOSIX_TIMERFD_BASE)/include
 
 LIBPOSIX_TIMERFD_SRCS-y += $(LIBPOSIX_TIMERFD_BASE)/timerfd.c
+
+UK_PROVIDED_SYSCALLS-$(CONFIG_LIBPOSIX_TIMERFD) += timerfd_create-2
+UK_PROVIDED_SYSCALLS-$(CONFIG_LIBPOSIX_TIMERFD) += timerfd_settime-4
+UK_PROVIDED_SYSCALLS-$(CONFIG_LIBPOSIX_TIMERFD) += timerfd_gettime-2
diff --git a/lib/posix-timerfd/timerfd.c b/lib/posix-timerfd/timerfd.c
index ec690a0cb..fc895b40e 100644
--- a/lib/posix-timerfd/timerfd.c
+++ b/lib/posix-timerfd/timerfd.c
@@ -17,6 +17,7 @@
 #include <uk/mutex.h>
 #include <uk/sched.h>
 #include <uk/timeutil.h>
+#include <uk/syscall.h>
 
 
 static const char TIMERFD_VOLID[] = "timerfd_vol";
@@ -330,3 +331,45 @@ int uk_sys_timerfd_gettime(const struct uk_file *f,
 	curr_value->it_value = uk_time_spec_from_nsec(st.next);
 	return 0;
 }
+
+/* Syscalls */
+
+UK_SYSCALL_R_DEFINE(int, timerfd_create, int, id, int, flags)
+{
+	return uk_sys_timerfd_create(id, flags);
+}
+
+UK_SYSCALL_R_DEFINE(int, timerfd_settime, int, fd, int, flags,
+		    const struct itimerspec *, new_value,
+		    struct itimerspec *, old_value)
+{
+	int r;
+	struct uk_ofile *of;
+
+	if (unlikely(!new_value))
+		return -EFAULT;
+
+	of = uk_fdtab_get(fd);
+	if (unlikely(!of))
+		return -EBADF;
+	r = uk_sys_timerfd_settime(of->file, flags, new_value, old_value);
+	uk_fdtab_ret(of);
+	return r;
+}
+
+UK_SYSCALL_R_DEFINE(int, timerfd_gettime, int, fd,
+		    struct itimerspec *, curr_value)
+{
+	int r;
+	struct uk_ofile *of;
+
+	if (unlikely(!curr_value))
+		return -EFAULT;
+
+	of = uk_fdtab_get(fd);
+	if (unlikely(!of))
+		return -EBADF;
+	r = uk_sys_timerfd_gettime(of->file, curr_value);
+	uk_fdtab_ret(of);
+	return r;
+}