[UNIKRAFT PATCH 07/11] lib/vfscore: Register `fsync` and `fdatasync` to syscall_shim

[Constantin Raducanu <raducanu.costi@xxxxxxxxx>]

Registers `fsync` and `fdatasync` system calls to syscall_shim library.

Signed-off-by: Constantin Raducanu <raducanu.costi@xxxxxxxxx>
---
 lib/vfscore/Makefile.uk   |  4 +++-
 lib/vfscore/exportsyms.uk |  4 ++++
 lib/vfscore/main.c        | 13 ++++++-------
 3 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/lib/vfscore/Makefile.uk b/lib/vfscore/Makefile.uk
index 63fc806..a643c03 100644
--- a/lib/vfscore/Makefile.uk
+++ b/lib/vfscore/Makefile.uk
@@ -48,4 +48,6 @@ UK_PROVIDED_SYSCALLS-$(CONFIG_LIBVFSCORE) += pwritev-4
 UK_PROVIDED_SYSCALLS-$(CONFIG_LIBVFSCORE) += utimes-2
 UK_PROVIDED_SYSCALLS-$(CONFIG_LIBVFSCORE) += mknod-3
 UK_PROVIDED_SYSCALLS-$(CONFIG_LIBVFSCORE) += rmdir-1
-UK_PROVIDED_SYSCALLS-$(CONFIG_LIBVFSCORE) += rename-2
\ No newline at end of file
+UK_PROVIDED_SYSCALLS-$(CONFIG_LIBVFSCORE) += rename-2
+UK_PROVIDED_SYSCALLS-$(CONFIG_LIBVFSCORE) += fsync-1
+UK_PROVIDED_SYSCALLS-$(CONFIG_LIBVFSCORE) += fdatasync-1
\ No newline at end of file
diff --git a/lib/vfscore/exportsyms.uk b/lib/vfscore/exportsyms.uk
index 4a8a4f4..d297957 100644
--- a/lib/vfscore/exportsyms.uk
+++ b/lib/vfscore/exportsyms.uk
@@ -25,6 +25,8 @@ uk_syscall_e_read
 uk_syscall_r_read
 mkdir
 fsync
+uk_syscall_e_fsync
+uk_syscall_r_fsync
 fstat
 uk_syscall_e_fstat
 uk_syscall_r_fstat
@@ -94,6 +96,8 @@ uk_syscall_r_mknod
 preadv
 ioctl
 fdatasync
+uk_syscall_e_fdatasync
+uk_syscall_r_fdatasync
 fdopendir
 dirfd
 rewinddir
diff --git a/lib/vfscore/main.c b/lib/vfscore/main.c
index 41c81f5..25da26b 100644
--- a/lib/vfscore/main.c
+++ b/lib/vfscore/main.c
@@ -489,7 +489,7 @@ UK_TRACEPOINT(trace_vfs_fsync, "%d", int);
 UK_TRACEPOINT(trace_vfs_fsync_ret, "");
 UK_TRACEPOINT(trace_vfs_fsync_err, "%d", int);
 
-int fsync(int fd)
+UK_SYSCALL_R_DEFINE(int, fsync, int, fd)
 {
        struct vfscore_file *fp;
        int error;
@@ -497,23 +497,22 @@ int fsync(int fd)
        trace_vfs_fsync(fd);
        error = fget(fd, &fp);
        if (error)
-               goto out_errno;
+               goto out_error;
 
        error = sys_fsync(fp);
        fdrop(fp);
 
        if (error)
-               goto out_errno;
+               goto out_error;
        trace_vfs_fsync_ret();
        return 0;
 
-       out_errno:
+       out_error:
        trace_vfs_fsync_err(error);
-       errno = error;
-       return -1;
+       return -error;
 }
 
-int fdatasync(int fd)
+UK_SYSCALL_R_DEFINE(int, fdatasync, int, fd)
 {
        // TODO: See if we can do less than fsync().
        return fsync(fd);
-- 
2.17.1