Call socreate() before falloc() in sys_socket().

This is similar to what we do in sys_socketpair() and will allow us
to grab the KERNEL_LOCK() only after having created a socket.

ok tedu@

diff --git a/sys/kern/uipc_syscalls.c b/sys/kern/uipc_syscalls.c
index 75918cc..fb83d1b 100644 (file)
--- a/sys/kern/uipc_syscalls.c
+++ b/sys/kern/uipc_syscalls.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: uipc_syscalls.c,v 1.162 2018/01/09 15:14:23 mpi Exp $ */
+/*     $OpenBSD: uipc_syscalls.c,v 1.163 2018/02/09 07:32:35 mpi Exp $ */
 /*     $NetBSD: uipc_syscalls.c,v 1.19 1996/02/09 19:00:48 christos Exp $      */
 
 /*
@@ -83,7 +83,7 @@ sys_socket(struct proc *p, void *v, register_t *retval)
        struct file *fp;
        int type = SCARG(uap, type);
        int domain = SCARG(uap, domain);
-       int fd, error;
+       int fd, cloexec, nonblock, fflag, error;
        unsigned int ss = 0;
 
        if ((type & SOCK_DNS) && !(domain == AF_INET || domain == AF_INET6))
@@ -95,23 +95,24 @@ sys_socket(struct proc *p, void *v, register_t *retval)
        if (error)
                return (error);
 
-       fdplock(fdp);
-       error = falloc(p, (type & SOCK_CLOEXEC) ? UF_EXCLOSE : 0, &fp, &fd);
-       fdpunlock(fdp);
+       type &= ~(SOCK_CLOEXEC | SOCK_NONBLOCK | SOCK_DNS);
+       cloexec = (SCARG(uap, type) & SOCK_CLOEXEC) ? UF_EXCLOSE : 0;
+       nonblock = SCARG(uap, type) &  SOCK_NONBLOCK;
+       fflag = FREAD | FWRITE | (nonblock ? FNONBLOCK : 0);
+
+       error = socreate(SCARG(uap, domain), &so, type, SCARG(uap, protocol));
        if (error != 0)
                goto out;
 
-       fp->f_flag = FREAD | FWRITE | (type & SOCK_NONBLOCK ? FNONBLOCK : 0);
-       fp->f_type = DTYPE_SOCKET;
-       fp->f_ops = &socketops;
-       error = socreate(SCARG(uap, domain), &so,
-           type & ~(SOCK_CLOEXEC | SOCK_NONBLOCK | SOCK_DNS), SCARG(uap, protocol));
+       fdplock(fdp);
+       error = falloc(p, cloexec, &fp, &fd);
+       fdpunlock(fdp);
        if (error) {
-               fdplock(fdp);
-               fdremove(fdp, fd);
-               closef(fp, p);
-               fdpunlock(fdp);
+               soclose(so);
        } else {
+               fp->f_flag = fflag;
+               fp->f_type = DTYPE_SOCKET;
+               fp->f_ops = &socketops;
                if (type & SOCK_NONBLOCK)
                        so->so_state |= SS_NBIO;
                so->so_state |= ss;