svn commit: r324227 - in head: lib/libprocstat sys/kern sys/netinet6 sys/sys usr.bin/bluetooth/btsockstat usr.bin/netstat usr.bin/sockstat usr.bin/systat
Gleb Smirnoff
glebius at FreeBSD.org
Mon Oct 2 23:29:59 UTC 2017
Author: glebius
Date: Mon Oct 2 23:29:56 2017
New Revision: 324227
URL: https://svnweb.freebsd.org/changeset/base/324227
Log:
Hide struct socket and struct unpcb from the userland.
Violators may define _WANT_SOCKET and _WANT_UNPCB respectively and
are not guaranteed for stability of the structures. The violators
list is the the usual one: libprocstat(3) and netstat(1) internally
and lsof in ports.
In struct xunpcb remove the inclusion of kernel structure and add
a bunch of spare fields. The xsocket already has socket not included,
but add there spares as well. Embed xsockbuf into xsocket.
Sort declarations in sys/socketvar.h to separate kernel only from
userland available ones.
PR: 221820 (exp-run)
Deleted:
head/sys/sys/sockstate.h
Modified:
head/lib/libprocstat/libprocstat.c
head/sys/kern/uipc_usrreq.c
head/sys/netinet6/send.c
head/sys/sys/param.h
head/sys/sys/sockbuf.h
head/sys/sys/socketvar.h
head/sys/sys/unpcb.h
head/usr.bin/bluetooth/btsockstat/btsockstat.c
head/usr.bin/netstat/inet.c
head/usr.bin/netstat/netgraph.c
head/usr.bin/netstat/unix.c
head/usr.bin/sockstat/sockstat.c
head/usr.bin/systat/netstat.c
Modified: head/lib/libprocstat/libprocstat.c
==============================================================================
--- head/lib/libprocstat/libprocstat.c Mon Oct 2 23:23:12 2017 (r324226)
+++ head/lib/libprocstat/libprocstat.c Mon Oct 2 23:29:56 2017 (r324227)
@@ -48,10 +48,12 @@ __FBSDID("$FreeBSD$");
#include <sys/stat.h>
#include <sys/vnode.h>
#include <sys/socket.h>
+#define _WANT_SOCKET
#include <sys/socketvar.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/un.h>
+#define _WANT_UNPCB
#include <sys/unpcb.h>
#include <sys/sysctl.h>
#include <sys/tty.h>
Modified: head/sys/kern/uipc_usrreq.c
==============================================================================
--- head/sys/kern/uipc_usrreq.c Mon Oct 2 23:23:12 2017 (r324226)
+++ head/sys/kern/uipc_usrreq.c Mon Oct 2 23:29:56 2017 (r324227)
@@ -1646,12 +1646,20 @@ unp_pcblist(SYSCTL_HANDLER_ARGS)
if (unp->unp_addr != NULL)
bcopy(unp->unp_addr, &xu->xu_addr,
unp->unp_addr->sun_len);
+ else
+ bzero(&xu->xu_addr, sizeof(xu->xu_addr));
if (unp->unp_conn != NULL &&
unp->unp_conn->unp_addr != NULL)
bcopy(unp->unp_conn->unp_addr,
&xu->xu_caddr,
unp->unp_conn->unp_addr->sun_len);
- bcopy(unp, &xu->xu_unp, sizeof *unp);
+ else
+ bzero(&xu->xu_caddr, sizeof(xu->xu_caddr));
+ xu->unp_vnode = unp->unp_vnode;
+ xu->unp_conn = unp->unp_conn;
+ xu->xu_firstref = LIST_FIRST(&unp->unp_refs);
+ xu->xu_nextref = LIST_NEXT(unp, unp_reflink);
+ xu->unp_gencnt = unp->unp_gencnt;
sotoxsocket(unp->unp_socket, &xu->xu_socket);
UNP_PCB_UNLOCK(unp);
error = SYSCTL_OUT(req, xu, sizeof *xu);
Modified: head/sys/netinet6/send.c
==============================================================================
--- head/sys/netinet6/send.c Mon Oct 2 23:23:12 2017 (r324226)
+++ head/sys/netinet6/send.c Mon Oct 2 23:29:56 2017 (r324227)
@@ -37,7 +37,6 @@ __FBSDID("$FreeBSD$");
#include <sys/sdt.h>
#include <sys/systm.h>
#include <sys/socket.h>
-#include <sys/sockstate.h>
#include <sys/sockbuf.h>
#include <sys/socketvar.h>
#include <sys/types.h>
Modified: head/sys/sys/param.h
==============================================================================
--- head/sys/sys/param.h Mon Oct 2 23:23:12 2017 (r324226)
+++ head/sys/sys/param.h Mon Oct 2 23:29:56 2017 (r324227)
@@ -58,7 +58,7 @@
* in the range 5 to 9.
*/
#undef __FreeBSD_version
-#define __FreeBSD_version 1200047 /* Master, propagated to newvers */
+#define __FreeBSD_version 1200048 /* Master, propagated to newvers */
/*
* __FreeBSD_kernel__ indicates that this system uses the kernel of FreeBSD,
Modified: head/sys/sys/sockbuf.h
==============================================================================
--- head/sys/sys/sockbuf.h Mon Oct 2 23:23:12 2017 (r324226)
+++ head/sys/sys/sockbuf.h Mon Oct 2 23:29:56 2017 (r324227)
@@ -65,18 +65,6 @@ struct socket;
struct thread;
struct selinfo;
-struct xsockbuf {
- u_int sb_cc;
- u_int sb_hiwat;
- u_int sb_mbcnt;
- u_int sb_mcnt;
- u_int sb_ccnt;
- u_int sb_mbmax;
- int sb_lowat;
- int sb_timeo;
- short sb_flags;
-};
-
/*
* Variables for socket buffering.
*
@@ -174,7 +162,6 @@ struct mbuf *
sbsndptr(struct sockbuf *sb, u_int off, u_int len, u_int *moff);
struct mbuf *
sbsndmbuf(struct sockbuf *sb, u_int off, u_int *moff);
-void sbtoxsockbuf(struct sockbuf *sb, struct xsockbuf *xsb);
int sbwait(struct sockbuf *sb);
int sblock(struct sockbuf *sb, int flags);
void sbunlock(struct sockbuf *sb);
Modified: head/sys/sys/socketvar.h
==============================================================================
--- head/sys/sys/socketvar.h Mon Oct 2 23:23:12 2017 (r324226)
+++ head/sys/sys/socketvar.h Mon Oct 2 23:29:56 2017 (r324227)
@@ -34,6 +34,12 @@
#ifndef _SYS_SOCKETVAR_H_
#define _SYS_SOCKETVAR_H_
+/*
+ * Socket generation count type. Also used in xinpcb, xtcpcb, xunpcb.
+ */
+typedef uint64_t so_gen_t;
+
+#if defined(_KERNEL) || defined(_WANT_SOCKET)
#include <sys/queue.h> /* for TAILQ macros */
#include <sys/selinfo.h> /* for struct selinfo */
#include <sys/_lock.h>
@@ -41,7 +47,6 @@
#include <sys/osd.h>
#include <sys/_sx.h>
#include <sys/sockbuf.h>
-#include <sys/sockstate.h>
#ifdef _KERNEL
#include <sys/caprights.h>
#include <sys/sockopt.h>
@@ -55,7 +60,6 @@ struct vnet;
* handle on protocol and pointer to protocol
* private data and error information.
*/
-typedef uint64_t so_gen_t;
typedef int so_upcall_t(struct socket *, void *, int);
struct socket;
@@ -167,7 +171,40 @@ struct socket {
};
};
};
+#endif /* defined(_KERNEL) || defined(_WANT_SOCKET) */
+/*
+ * Socket state bits.
+ *
+ * Historically, this bits were all kept in the so_state field. For
+ * locking reasons, they are now in multiple fields, as they are
+ * locked differently. so_state maintains basic socket state protected
+ * by the socket lock. so_qstate holds information about the socket
+ * accept queues. Each socket buffer also has a state field holding
+ * information relevant to that socket buffer (can't send, rcv). Many
+ * fields will be read without locks to improve performance and avoid
+ * lock order issues. However, this approach must be used with caution.
+ */
+#define SS_NOFDREF 0x0001 /* no file table ref any more */
+#define SS_ISCONNECTED 0x0002 /* socket connected to a peer */
+#define SS_ISCONNECTING 0x0004 /* in process of connecting to peer */
+#define SS_ISDISCONNECTING 0x0008 /* in process of disconnecting */
+#define SS_NBIO 0x0100 /* non-blocking ops */
+#define SS_ASYNC 0x0200 /* async i/o notify */
+#define SS_ISCONFIRMING 0x0400 /* deciding to accept connection req */
+#define SS_ISDISCONNECTED 0x2000 /* socket disconnected from peer */
+
+/*
+ * Protocols can mark a socket as SS_PROTOREF to indicate that, following
+ * pru_detach, they still want the socket to persist, and will free it
+ * themselves when they are done. Protocols should only ever call sofree()
+ * following setting this flag in pru_detach(), and never otherwise, as
+ * sofree() bypasses socket reference counting.
+ */
+#define SS_PROTOREF 0x4000 /* strong protocol reference */
+
+#ifdef _KERNEL
+
#define SOCK_MTX(so) &(so)->so_lock
#define SOCK_LOCK(so) mtx_lock(&(so)->so_lock)
#define SOCK_OWNED(so) mtx_owned(&(so)->so_lock)
@@ -194,32 +231,6 @@ struct socket {
} while (0)
/*
- * Externalized form of struct socket used by the sysctl(3) interface.
- */
-struct xsocket {
- size_t xso_len; /* length of this structure */
- struct socket *xso_so; /* makes a convenient handle sometimes */
- short so_type;
- short so_options;
- short so_linger;
- short so_state;
- caddr_t so_pcb; /* another convenient handle */
- int xso_protocol;
- int xso_family;
- u_int so_qlen;
- u_int so_incqlen;
- u_int so_qlimit;
- short so_timeo;
- u_short so_error;
- pid_t so_pgid;
- u_long so_oobmark;
- struct xsockbuf so_rcv, so_snd;
- uid_t so_uid; /* XXX */
-};
-
-#ifdef _KERNEL
-
-/*
* Macros for sockets and socket buffering.
*/
@@ -422,7 +433,6 @@ int sosend_generic(struct socket *so, struct sockaddr
struct uio *uio, struct mbuf *top, struct mbuf *control,
int flags, struct thread *td);
int soshutdown(struct socket *so, int how);
-void sotoxsocket(struct socket *so, struct xsocket *xso);
void soupcall_clear(struct socket *, int);
void soupcall_set(struct socket *, int, so_upcall_t, void *);
void solisten_upcall_set(struct socket *, so_upcall_t, void *);
@@ -431,6 +441,14 @@ void sowakeup_aio(struct socket *so, struct sockbuf *s
void solisten_wakeup(struct socket *);
int selsocket(struct socket *so, int events, struct timeval *tv,
struct thread *td);
+void soisconnected(struct socket *so);
+void soisconnecting(struct socket *so);
+void soisdisconnected(struct socket *so);
+void soisdisconnecting(struct socket *so);
+void socantrcvmore(struct socket *so);
+void socantrcvmore_locked(struct socket *so);
+void socantsendmore(struct socket *so);
+void socantsendmore_locked(struct socket *so);
/*
* Accept filter functions (duh).
@@ -446,5 +464,59 @@ int accept_filt_generic_mod_event(module_t mod, int ev
#endif
#endif /* _KERNEL */
+
+/*
+ * Structure to export socket from kernel to utilities, via sysctl(3).
+ */
+struct xsocket {
+ size_t xso_len; /* length of this structure */
+ union {
+ void *xso_so; /* kernel address of struct socket */
+ int64_t ph_so;
+ };
+ union {
+ void *so_pcb; /* kernel address of struct inpcb */
+ int64_t ph_pcb;
+ };
+ uint64_t so_oobmark;
+ int64_t so_spare64[8];
+ int32_t xso_protocol;
+ int32_t xso_family;
+ uint32_t so_qlen;
+ uint32_t so_incqlen;
+ uint32_t so_qlimit;
+ pid_t so_pgid;
+ uid_t so_uid;
+ int32_t so_spare32[8];
+ int16_t so_type;
+ int16_t so_options;
+ int16_t so_linger;
+ int16_t so_state;
+ int16_t so_timeo;
+ uint16_t so_error;
+ struct xsockbuf {
+ uint32_t sb_cc;
+ uint32_t sb_hiwat;
+ uint32_t sb_mbcnt;
+ uint32_t sb_mcnt;
+ uint32_t sb_ccnt;
+ uint32_t sb_mbmax;
+ int32_t sb_lowat;
+ int32_t sb_timeo;
+ int16_t sb_flags;
+ } so_rcv, so_snd;
+};
+
+#ifdef _KERNEL
+void sotoxsocket(struct socket *so, struct xsocket *xso);
+void sbtoxsockbuf(struct sockbuf *sb, struct xsockbuf *xsb);
+#endif
+
+/*
+ * Socket buffer state bits. Exported via libprocstat(3).
+ */
+#define SBS_CANTSENDMORE 0x0010 /* can't send more data to peer */
+#define SBS_CANTRCVMORE 0x0020 /* can't receive more data from peer */
+#define SBS_RCVATMARK 0x0040 /* at mark on input */
#endif /* !_SYS_SOCKETVAR_H_ */
Modified: head/sys/sys/unpcb.h
==============================================================================
--- head/sys/sys/unpcb.h Mon Oct 2 23:23:12 2017 (r324226)
+++ head/sys/sys/unpcb.h Mon Oct 2 23:29:56 2017 (r324227)
@@ -33,6 +33,9 @@
#ifndef _SYS_UNPCB_H_
#define _SYS_UNPCB_H_
+typedef uint64_t unp_gen_t;
+
+#if defined(_KERNEL) || defined(_WANT_UNPCB)
#include <sys/queue.h>
#include <sys/ucred.h>
@@ -61,7 +64,6 @@
* so that changes in the sockbuf may be computed to modify
* back pressure on the sender accordingly.
*/
-typedef u_quad_t unp_gen_t;
LIST_HEAD(unp_head, unpcb);
struct unpcb {
@@ -74,8 +76,6 @@ struct unpcb {
struct unp_head unp_refs; /* referencing socket linked list */
LIST_ENTRY(unpcb) unp_reflink; /* link in unp_refs list */
struct sockaddr_un *unp_addr; /* bound address of socket */
- int reserved1;
- int reserved2;
unp_gen_t unp_gencnt; /* generation count of this instance */
short unp_flags; /* flags */
short unp_gcflag; /* Garbage collector flags. */
@@ -116,32 +116,50 @@ struct unpcb {
#define sotounpcb(so) ((struct unpcb *)((so)->so_pcb))
-/* Hack alert -- this structure depends on <sys/socketvar.h>. */
+#endif /* _KERNEL || _WANT_UNPCB */
+
+/*
+ * UNPCB structure exported to user-land via sysctl(3).
+ *
+ * Fields prefixed with "xu_" are unique to the export structure, and fields
+ * with "unp_" or other prefixes match corresponding fields of 'struct unpcb'.
+ *
+ * Legend:
+ * (s) - used by userland utilities in src
+ * (p) - used by utilities in ports
+ * (3) - is known to be used by third party software not in ports
+ * (n) - no known usage
+ *
+ * Evil hack: declare only if sys/socketvar.h have been included.
+ */
#ifdef _SYS_SOCKETVAR_H_
struct xunpcb {
- size_t xu_len; /* length of this structure */
- struct unpcb *xu_unpp; /* to help netstat, fstat */
- struct unpcb xu_unp; /* our information */
+ size_t xu_len; /* length of this structure */
+ void *xu_unpp; /* to help netstat, fstat */
+ void *unp_vnode; /* (s) */
+ void *unp_conn; /* (s) */
+ void *xu_firstref; /* (s) */
+ void *xu_nextref; /* (s) */
+ unp_gen_t unp_gencnt; /* (s) */
+ int64_t xu_spare64[8];
+ int32_t xu_spare32[8];
union {
- struct sockaddr_un xuu_addr; /* our bound address */
+ struct sockaddr_un xu_addr; /* our bound address */
char xu_dummy1[256];
- } xu_au;
-#define xu_addr xu_au.xuu_addr
+ };
union {
- struct sockaddr_un xuu_caddr; /* their bound address */
+ struct sockaddr_un xu_caddr; /* their bound address */
char xu_dummy2[256];
- } xu_cau;
-#define xu_caddr xu_cau.xuu_caddr
- struct xsocket xu_socket;
- u_quad_t xu_alignment_hack;
-};
+ };
+ struct xsocket xu_socket;
+} __aligned(8);
struct xunpgen {
size_t xug_len;
u_int xug_count;
unp_gen_t xug_gen;
so_gen_t xug_sogen;
-};
+} __aligned(8);;
#endif /* _SYS_SOCKETVAR_H_ */
#endif /* _SYS_UNPCB_H_ */
Modified: head/usr.bin/bluetooth/btsockstat/btsockstat.c
==============================================================================
--- head/usr.bin/bluetooth/btsockstat/btsockstat.c Mon Oct 2 23:23:12 2017 (r324226)
+++ head/usr.bin/bluetooth/btsockstat/btsockstat.c Mon Oct 2 23:29:56 2017 (r324227)
@@ -35,6 +35,7 @@
#include <sys/protosw.h>
#include <sys/queue.h>
#include <sys/socket.h>
+#define _WANT_SOCKET
#include <sys/socketvar.h>
#include <net/if.h>
Modified: head/usr.bin/netstat/inet.c
==============================================================================
--- head/usr.bin/netstat/inet.c Mon Oct 2 23:23:12 2017 (r324226)
+++ head/usr.bin/netstat/inet.c Mon Oct 2 23:29:56 2017 (r324227)
@@ -41,6 +41,7 @@ __FBSDID("$FreeBSD$");
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/socket.h>
+#define _WANT_SOCKET
#include <sys/socketvar.h>
#include <sys/sysctl.h>
@@ -172,7 +173,7 @@ sotoxsocket(struct socket *so, struct xsocket *xso)
xso->xso_family = domain.dom_family;
xso->so_timeo = so->so_timeo;
xso->so_error = so->so_error;
- if (SOLISTENING(so)) {
+ if ((so->so_options & SO_ACCEPTCONN) != 0) {
xso->so_qlen = so->sol_qlen;
xso->so_incqlen = so->sol_incqlen;
xso->so_qlimit = so->sol_qlimit;
Modified: head/usr.bin/netstat/netgraph.c
==============================================================================
--- head/usr.bin/netstat/netgraph.c Mon Oct 2 23:23:12 2017 (r324226)
+++ head/usr.bin/netstat/netgraph.c Mon Oct 2 23:29:56 2017 (r324227)
@@ -38,6 +38,7 @@ __FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/socket.h>
+#define _WANT_SOCKET
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <sys/linker.h>
Modified: head/usr.bin/netstat/unix.c
==============================================================================
--- head/usr.bin/netstat/unix.c Mon Oct 2 23:23:12 2017 (r324226)
+++ head/usr.bin/netstat/unix.c Mon Oct 2 23:29:56 2017 (r324227)
@@ -43,10 +43,12 @@ __FBSDID("$FreeBSD$");
#include <sys/queue.h>
#include <sys/protosw.h>
#include <sys/socket.h>
+#define _WANT_SOCKET
#include <sys/socketvar.h>
#include <sys/mbuf.h>
#include <sys/sysctl.h>
#include <sys/un.h>
+#define _WANT_UNPCB
#include <sys/unpcb.h>
#include <netinet/in.h>
@@ -100,7 +102,7 @@ static int
pcblist_kvm(u_long count_off, u_long gencnt_off, u_long head_off, char **bufp)
{
struct unp_head head;
- struct unpcb *unp, unp_conn;
+ struct unpcb *unp, unp0, unp_conn;
u_char sun_len;
struct socket so;
struct xunpgen xug;
@@ -150,8 +152,8 @@ pcblist_kvm(u_long count_off, u_long gencnt_off, u_lon
KREAD(head_off, &head, sizeof(head));
LIST_FOREACH(unp, &head, unp_link) {
xu.xu_unpp = unp;
- KREAD(unp, &xu.xu_unp, sizeof (*unp));
- unp = &xu.xu_unp;
+ KREAD(unp, &unp0, sizeof (*unp));
+ unp = &unp0;
if (unp->unp_gencnt > unp_gencnt)
continue;
@@ -236,7 +238,7 @@ unixpr(u_long count_off, u_long gencnt_off, u_long dhe
so = &xunp->xu_socket;
/* Ignore PCBs which were freed during copyout. */
- if (xunp->xu_unp.unp_gencnt > oxug->xug_gen)
+ if (xunp->unp_gencnt > oxug->xug_gen)
continue;
if (*first) {
xo_open_list("socket");
@@ -268,7 +270,6 @@ unixpr(u_long count_off, u_long gencnt_off, u_long dhe
static void
unixdomainpr(struct xunpcb *xunp, struct xsocket *so)
{
- struct unpcb *unp;
struct sockaddr_un *sa;
static int first = 1;
char buf1[33];
@@ -292,11 +293,7 @@ unixdomainpr(struct xunpcb *xunp, struct xsocket *so)
};
int fmt = (sizeof(void *) == 8) ? 1 : 0;
- unp = &xunp->xu_unp;
- if (unp->unp_addr)
- sa = &xunp->xu_addr;
- else
- sa = (struct sockaddr_un *)0;
+ sa = (xunp->xu_addr.sun_family == AF_UNIX) ? &xunp->xu_addr : NULL;
if (first && !Lflag) {
xo_emit("{T:Active UNIX domain sockets}\n");
@@ -318,10 +315,9 @@ unixdomainpr(struct xunpcb *xunp, struct xsocket *so)
} else {
xo_emit(format[fmt],
(long)so->so_pcb, socktype[so->so_type], so->so_rcv.sb_cc,
- so->so_snd.sb_cc, (long)unp->unp_vnode,
- (long)unp->unp_conn,
- (long)LIST_FIRST(&unp->unp_refs),
- (long)LIST_NEXT(unp, unp_reflink));
+ so->so_snd.sb_cc, (long)xunp->unp_vnode,
+ (long)xunp->unp_conn, (long)xunp->xu_firstref,
+ (long)xunp->xu_nextref);
}
if (sa)
xo_emit(" {:path/%.*s}",
Modified: head/usr.bin/sockstat/sockstat.c
==============================================================================
--- head/usr.bin/sockstat/sockstat.c Mon Oct 2 23:23:12 2017 (r324226)
+++ head/usr.bin/sockstat/sockstat.c Mon Oct 2 23:29:56 2017 (r324227)
@@ -37,6 +37,7 @@ __FBSDID("$FreeBSD$");
#include <sys/user.h>
#include <sys/un.h>
+#define _WANT_UNPCB
#include <sys/unpcb.h>
#include <net/route.h>
@@ -784,8 +785,8 @@ gather_unix(int proto)
warnx("struct xunpcb size mismatch");
goto out;
}
- if ((xup->xu_unp.unp_conn == NULL && !opt_l) ||
- (xup->xu_unp.unp_conn != NULL && !opt_c))
+ if ((xup->unp_conn == NULL && !opt_l) ||
+ (xup->unp_conn != NULL && !opt_c))
continue;
if ((sock = calloc(1, sizeof(*sock))) == NULL)
err(1, "malloc()");
@@ -798,11 +799,11 @@ gather_unix(int proto)
sock->proto = proto;
sock->family = AF_UNIX;
sock->protoname = protoname;
- if (xup->xu_unp.unp_addr != NULL)
+ if (xup->xu_addr.sun_family == AF_UNIX)
laddr->address =
*(struct sockaddr_storage *)(void *)&xup->xu_addr;
- else if (xup->xu_unp.unp_conn != NULL)
- *(void **)&(faddr->address) = xup->xu_unp.unp_conn;
+ else if (xup->unp_conn != NULL)
+ *(void **)&(faddr->address) = xup->unp_conn;
laddr->next = NULL;
faddr->next = NULL;
sock->laddr = laddr;
Modified: head/usr.bin/systat/netstat.c
==============================================================================
--- head/usr.bin/systat/netstat.c Mon Oct 2 23:23:12 2017 (r324226)
+++ head/usr.bin/systat/netstat.c Mon Oct 2 23:29:56 2017 (r324227)
@@ -41,6 +41,7 @@ static const char sccsid[] = "@(#)netstat.c 8.1 (Berke
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/socket.h>
+#define _WANT_SOCKET
#include <sys/socketvar.h>
#include <sys/protosw.h>
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