mirror of https://github.com/F-Stack/f-stack.git
johnjiang
GitHub
commit
c693ae49fc
|
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@ -1,4 +1,6 @@
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1982, 1986, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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@ -10,7 +12,7 @@
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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@ -34,6 +36,12 @@
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#ifndef _SYS_SOCKETVAR_H_
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#define _SYS_SOCKETVAR_H_
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/*
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* Socket generation count type. Also used in xinpcb, xtcpcb, xunpcb.
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*/
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typedef uint64_t so_gen_t;
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#if defined(_KERNEL) || defined(_WANT_SOCKET)
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#include <sys/queue.h> /* for TAILQ macros */
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#include <sys/selinfo.h> /* for struct selinfo */
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#include <sys/_lock.h>
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@ -41,7 +49,6 @@
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#include <sys/osd.h>
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#include <sys/_sx.h>
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#include <sys/sockbuf.h>
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#include <sys/sockstate.h>
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#ifdef _KERNEL
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#include <sys/caprights.h>
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#include <sys/sockopt.h>
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@ -55,68 +62,52 @@ struct vnet;
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* handle on protocol and pointer to protocol
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* private data and error information.
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*/
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typedef u_quad_t so_gen_t;
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typedef int so_upcall_t(struct socket *, void *, int);
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typedef void so_dtor_t(struct socket *);
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struct socket;
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enum socket_qstate {
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SQ_NONE = 0,
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SQ_INCOMP = 0x0800, /* on sol_incomp */
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SQ_COMP = 0x1000, /* on sol_comp */
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};
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/*-
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* Locking key to struct socket:
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* (a) constant after allocation, no locking required.
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* (b) locked by SOCK_LOCK(so).
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* (c) locked by SOCKBUF_LOCK(&so->so_rcv).
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* (e) locked by ACCEPT_LOCK().
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* (cr) locked by SOCKBUF_LOCK(&so->so_rcv).
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* (cs) locked by SOCKBUF_LOCK(&so->so_snd).
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* (e) locked by SOLISTEN_LOCK() of corresponding listening socket.
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* (f) not locked since integer reads/writes are atomic.
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* (g) used only as a sleep/wakeup address, no value.
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* (h) locked by global mutex so_global_mtx.
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* (k) locked by KTLS workqueue mutex
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*/
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TAILQ_HEAD(accept_queue, socket);
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struct socket {
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int so_count; /* (b) reference count */
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struct mtx so_lock;
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volatile u_int so_count; /* (b / refcount) */
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struct selinfo so_rdsel; /* (b/cr) for so_rcv/so_comp */
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struct selinfo so_wrsel; /* (b/cs) for so_snd */
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short so_type; /* (a) generic type, see socket.h */
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short so_options; /* from socket call, see socket.h */
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short so_linger; /* time to linger while closing */
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int so_options; /* (b) from socket call, see socket.h */
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short so_linger; /* time to linger close(2) */
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short so_state; /* (b) internal state flags SS_* */
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int so_qstate; /* (e) internal state flags SQ_* */
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void *so_pcb; /* protocol control block */
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struct vnet *so_vnet; /* (a) network stack instance */
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struct protosw *so_proto; /* (a) protocol handle */
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/*
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* Variables for connection queuing.
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* Socket where accepts occur is so_head in all subsidiary sockets.
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* If so_head is 0, socket is not related to an accept.
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* For head socket so_incomp queues partially completed connections,
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* while so_comp is a queue of connections ready to be accepted.
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* If a connection is aborted and it has so_head set, then
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* it has to be pulled out of either so_incomp or so_comp.
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* We allow connections to queue up based on current queue lengths
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* and limit on number of queued connections for this socket.
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*/
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struct socket *so_head; /* (e) back pointer to listen socket */
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TAILQ_HEAD(, socket) so_incomp; /* (e) queue of partial unaccepted connections */
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TAILQ_HEAD(, socket) so_comp; /* (e) queue of complete unaccepted connections */
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TAILQ_ENTRY(socket) so_list; /* (e) list of unaccepted connections */
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u_int so_qlen; /* (e) number of unaccepted connections */
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u_int so_incqlen; /* (e) number of unaccepted incomplete
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connections */
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u_int so_qlimit; /* (e) max number queued connections */
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short so_timeo; /* (g) connection timeout */
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u_short so_error; /* (f) error affecting connection */
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struct sigio *so_sigio; /* [sg] information for async I/O or
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out of band data (SIGURG) */
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u_long so_oobmark; /* (c) chars to oob mark */
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struct sockbuf so_rcv, so_snd;
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struct ucred *so_cred; /* (a) user credentials */
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struct label *so_label; /* (b) MAC label for socket */
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struct label *so_peerlabel; /* (b) cached MAC label for peer */
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/* NB: generation count must not be first. */
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so_gen_t so_gencnt; /* (h) generation count */
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void *so_emuldata; /* (b) private data for emulators */
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struct so_accf {
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struct accept_filter *so_accept_filter;
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void *so_accept_filter_arg; /* saved filter args */
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char *so_accept_filter_str; /* saved user args */
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} *so_accf;
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so_dtor_t *so_dtor; /* (b) optional destructor */
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struct osd osd; /* Object Specific extensions */
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/*
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* so_fibnum, so_user_cookie and friends can be used to attach
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@ -127,65 +118,134 @@ struct socket {
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int so_fibnum; /* routing domain for this socket */
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uint32_t so_user_cookie;
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void *so_pspare[2]; /* packet pacing / general use */
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int so_ispare[2]; /* packet pacing / general use */
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int so_ts_clock; /* type of the clock used for timestamps */
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uint32_t so_max_pacing_rate; /* (f) TX rate limit in bytes/s */
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union {
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/* Regular (data flow) socket. */
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struct {
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/* (cr, cs) Receive and send buffers. */
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struct sockbuf so_rcv, so_snd;
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/* (e) Our place on accept queue. */
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TAILQ_ENTRY(socket) so_list;
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struct socket *so_listen; /* (b) */
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enum socket_qstate so_qstate; /* (b) */
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/* (b) cached MAC label for peer */
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struct label *so_peerlabel;
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u_long so_oobmark; /* chars to oob mark */
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/* (k) Our place on KTLS RX work queue. */
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STAILQ_ENTRY(socket) so_ktls_rx_list;
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};
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/*
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* Listening socket, where accepts occur, is so_listen in all
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* subsidiary sockets. If so_listen is NULL, socket is not
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* related to an accept. For a listening socket itself
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* sol_incomp queues partially completed connections, while
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* sol_comp is a queue of connections ready to be accepted.
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* If a connection is aborted and it has so_listen set, then
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* it has to be pulled out of either sol_incomp or sol_comp.
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* We allow connections to queue up based on current queue
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* lengths and limit on number of queued connections for this
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* socket.
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*/
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struct {
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/* (e) queue of partial unaccepted connections */
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struct accept_queue sol_incomp;
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/* (e) queue of complete unaccepted connections */
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struct accept_queue sol_comp;
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u_int sol_qlen; /* (e) sol_comp length */
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u_int sol_incqlen; /* (e) sol_incomp length */
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u_int sol_qlimit; /* (e) queue limit */
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/* accept_filter(9) optional data */
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struct accept_filter *sol_accept_filter;
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void *sol_accept_filter_arg; /* saved filter args */
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char *sol_accept_filter_str; /* saved user args */
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/* Optional upcall, for kernel socket. */
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so_upcall_t *sol_upcall; /* (e) */
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void *sol_upcallarg; /* (e) */
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/* Socket buffer parameters, to be copied to
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* dataflow sockets, accepted from this one. */
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int sol_sbrcv_lowat;
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int sol_sbsnd_lowat;
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u_int sol_sbrcv_hiwat;
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u_int sol_sbsnd_hiwat;
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short sol_sbrcv_flags;
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short sol_sbsnd_flags;
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sbintime_t sol_sbrcv_timeo;
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sbintime_t sol_sbsnd_timeo;
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/* Information tracking listen queue overflows. */
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struct timeval sol_lastover; /* (e) */
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int sol_overcount; /* (e) */
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};
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};
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#ifdef LVS_TCPOPT_TOA
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uint8_t so_toa[8]; /* lvs toa option */
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#endif
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};
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#endif /* defined(_KERNEL) || defined(_WANT_SOCKET) */
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/*
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* Global accept mutex to serialize access to accept queues and
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* fields associated with multiple sockets. This allows us to
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* avoid defining a lock order between listen and accept sockets
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* until such time as it proves to be a good idea.
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* Socket state bits.
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*
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* Historically, these bits were all kept in the so_state field.
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* They are now split into separate, lock-specific fields.
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* so_state maintains basic socket state protected by the socket lock.
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* so_qstate holds information about the socket accept queues.
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* Each socket buffer also has a state field holding information
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* relevant to that socket buffer (can't send, rcv).
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* Many fields will be read without locks to improve performance and avoid
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* lock order issues. However, this approach must be used with caution.
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*/
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extern struct mtx accept_mtx;
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#define ACCEPT_LOCK_ASSERT() mtx_assert(&accept_mtx, MA_OWNED)
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#define ACCEPT_UNLOCK_ASSERT() mtx_assert(&accept_mtx, MA_NOTOWNED)
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#define ACCEPT_LOCK() mtx_lock(&accept_mtx)
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#define ACCEPT_UNLOCK() mtx_unlock(&accept_mtx)
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#define SS_NOFDREF 0x0001 /* no file table ref any more */
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#define SS_ISCONNECTED 0x0002 /* socket connected to a peer */
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#define SS_ISCONNECTING 0x0004 /* in process of connecting to peer */
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#define SS_ISDISCONNECTING 0x0008 /* in process of disconnecting */
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#define SS_NBIO 0x0100 /* non-blocking ops */
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#define SS_ASYNC 0x0200 /* async i/o notify */
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#define SS_ISCONFIRMING 0x0400 /* deciding to accept connection req */
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#define SS_ISDISCONNECTED 0x2000 /* socket disconnected from peer */
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/*
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* Per-socket mutex: we reuse the receive socket buffer mutex for space
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* efficiency. This decision should probably be revisited as we optimize
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* locking for the socket code.
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* Protocols can mark a socket as SS_PROTOREF to indicate that, following
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* pru_detach, they still want the socket to persist, and will free it
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* themselves when they are done. Protocols should only ever call sofree()
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* following setting this flag in pru_detach(), and never otherwise, as
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* sofree() bypasses socket reference counting.
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*/
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#define SOCK_MTX(_so) SOCKBUF_MTX(&(_so)->so_rcv)
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#define SOCK_LOCK(_so) SOCKBUF_LOCK(&(_so)->so_rcv)
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#define SOCK_OWNED(_so) SOCKBUF_OWNED(&(_so)->so_rcv)
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#define SOCK_UNLOCK(_so) SOCKBUF_UNLOCK(&(_so)->so_rcv)
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#define SOCK_LOCK_ASSERT(_so) SOCKBUF_LOCK_ASSERT(&(_so)->so_rcv)
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/*
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* Socket state bits stored in so_qstate.
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*/
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#define SQ_INCOMP 0x0800 /* unaccepted, incomplete connection */
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#define SQ_COMP 0x1000 /* unaccepted, complete connection */
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/*
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* Externalized form of struct socket used by the sysctl(3) interface.
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*/
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struct xsocket {
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size_t xso_len; /* length of this structure */
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struct socket *xso_so; /* makes a convenient handle sometimes */
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short so_type;
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short so_options;
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short so_linger;
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short so_state;
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caddr_t so_pcb; /* another convenient handle */
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int xso_protocol;
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int xso_family;
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u_int so_qlen;
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u_int so_incqlen;
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u_int so_qlimit;
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short so_timeo;
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u_short so_error;
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pid_t so_pgid;
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u_long so_oobmark;
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struct xsockbuf so_rcv, so_snd;
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uid_t so_uid; /* XXX */
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};
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#define SS_PROTOREF 0x4000 /* strong protocol reference */
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#ifdef _KERNEL
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#define SOCK_MTX(so) &(so)->so_lock
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#define SOCK_LOCK(so) mtx_lock(&(so)->so_lock)
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#define SOCK_OWNED(so) mtx_owned(&(so)->so_lock)
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#define SOCK_UNLOCK(so) mtx_unlock(&(so)->so_lock)
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#define SOCK_LOCK_ASSERT(so) mtx_assert(&(so)->so_lock, MA_OWNED)
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#define SOCK_UNLOCK_ASSERT(so) mtx_assert(&(so)->so_lock, MA_NOTOWNED)
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#define SOLISTENING(sol) (((sol)->so_options & SO_ACCEPTCONN) != 0)
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#define SOLISTEN_LOCK(sol) do { \
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mtx_lock(&(sol)->so_lock); \
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KASSERT(SOLISTENING(sol), \
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("%s: %p not listening", __func__, (sol))); \
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} while (0)
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#define SOLISTEN_TRYLOCK(sol) mtx_trylock(&(sol)->so_lock)
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#define SOLISTEN_UNLOCK(sol) do { \
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KASSERT(SOLISTENING(sol), \
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("%s: %p not listening", __func__, (sol))); \
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mtx_unlock(&(sol)->so_lock); \
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} while (0)
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#define SOLISTEN_LOCK_ASSERT(sol) do { \
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mtx_assert(&(sol)->so_lock, MA_OWNED); \
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KASSERT(SOLISTENING(sol), \
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("%s: %p not listening", __func__, (sol))); \
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} while (0)
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/*
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* Macros for sockets and socket buffering.
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*/
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@ -209,8 +269,7 @@ struct xsocket {
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/* can we read something from so? */
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#define soreadabledata(so) \
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(sbavail(&(so)->so_rcv) >= (so)->so_rcv.sb_lowat || \
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!TAILQ_EMPTY(&(so)->so_comp) || (so)->so_error)
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(sbavail(&(so)->so_rcv) >= (so)->so_rcv.sb_lowat || (so)->so_error)
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#define soreadable(so) \
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(soreadabledata(so) || ((so)->so_rcv.sb_state & SBS_CANTRCVMORE))
|
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|
|
@ -223,26 +282,19 @@ struct xsocket {
|
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(so)->so_error)
|
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|
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/*
|
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* soref()/sorele() ref-count the socket structure. Note that you must
|
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* still explicitly close the socket, but the last ref count will free
|
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* the structure.
|
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* soref()/sorele() ref-count the socket structure.
|
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* soref() may be called without owning socket lock, but in that case a
|
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* caller must own something that holds socket, and so_count must be not 0.
|
||||
* Note that you must still explicitly close the socket, but the last ref
|
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* count will free the structure.
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*/
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#define soref(so) do { \
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SOCK_LOCK_ASSERT(so); \
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++(so)->so_count; \
|
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} while (0)
|
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|
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#define soref(so) refcount_acquire(&(so)->so_count)
|
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#define sorele(so) do { \
|
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ACCEPT_LOCK_ASSERT(); \
|
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SOCK_LOCK_ASSERT(so); \
|
||||
if ((so)->so_count <= 0) \
|
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panic("sorele"); \
|
||||
if (--(so)->so_count == 0) \
|
||||
if (refcount_release(&(so)->so_count)) \
|
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sofree(so); \
|
||||
else { \
|
||||
else \
|
||||
SOCK_UNLOCK(so); \
|
||||
ACCEPT_UNLOCK(); \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
/*
|
||||
|
|
@ -290,6 +342,22 @@ struct accept_filter {
|
|||
SLIST_ENTRY(accept_filter) accf_next;
|
||||
};
|
||||
|
||||
#define ACCEPT_FILTER_DEFINE(modname, filtname, cb, create, destroy, ver) \
|
||||
static struct accept_filter modname##_filter = { \
|
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.accf_name = filtname, \
|
||||
.accf_callback = cb, \
|
||||
.accf_create = create, \
|
||||
.accf_destroy = destroy, \
|
||||
}; \
|
||||
static moduledata_t modname##_mod = { \
|
||||
.name = __XSTRING(modname), \
|
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.evhand = accept_filt_generic_mod_event, \
|
||||
.priv = &modname##_filter, \
|
||||
}; \
|
||||
DECLARE_MODULE(modname, modname##_mod, SI_SUB_DRIVERS, \
|
||||
SI_ORDER_MIDDLE); \
|
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MODULE_VERSION(modname, ver)
|
||||
|
||||
#ifdef MALLOC_DECLARE
|
||||
MALLOC_DECLARE(M_ACCF);
|
||||
MALLOC_DECLARE(M_PCB);
|
||||
|
|
@ -321,6 +389,7 @@ extern u_long sb_max;
|
|||
extern so_gen_t so_gencnt;
|
||||
|
||||
struct file;
|
||||
struct filecaps;
|
||||
struct filedesc;
|
||||
struct mbuf;
|
||||
struct sockaddr;
|
||||
|
|
@ -338,9 +407,10 @@ struct uio;
|
|||
/*
|
||||
* From uipc_socket and friends
|
||||
*/
|
||||
int getsockaddr(struct sockaddr **namp, caddr_t uaddr, size_t len);
|
||||
int getsockaddr(struct sockaddr **namp, const struct sockaddr *uaddr,
|
||||
size_t len);
|
||||
int getsock_cap(struct thread *td, int fd, cap_rights_t *rightsp,
|
||||
struct file **fpp, u_int *fflagp);
|
||||
struct file **fpp, u_int *fflagp, struct filecaps *havecaps);
|
||||
void soabort(struct socket *so);
|
||||
int soaccept(struct socket *so, struct sockaddr **nam);
|
||||
void soaio_enqueue(struct task *task);
|
||||
|
|
@ -358,16 +428,18 @@ int soconnect2(struct socket *so1, struct socket *so2);
|
|||
int socreate(int dom, struct socket **aso, int type, int proto,
|
||||
struct ucred *cred, struct thread *td);
|
||||
int sodisconnect(struct socket *so);
|
||||
void sodtor_set(struct socket *, so_dtor_t *);
|
||||
struct sockaddr *sodupsockaddr(const struct sockaddr *sa, int mflags);
|
||||
void sofree(struct socket *so);
|
||||
void sohasoutofband(struct socket *so);
|
||||
int solisten(struct socket *so, int backlog, struct thread *td);
|
||||
void solisten_proto(struct socket *so, int backlog);
|
||||
int solisten_proto_check(struct socket *so);
|
||||
int solisten_dequeue(struct socket *, struct socket **, int);
|
||||
struct socket *
|
||||
sonewconn(struct socket *head, int connstatus);
|
||||
|
||||
|
||||
struct socket *
|
||||
sopeeloff(struct socket *);
|
||||
int sopoll(struct socket *so, int events, struct ucred *active_cred,
|
||||
struct thread *td);
|
||||
int sopoll_generic(struct socket *so, int events,
|
||||
|
|
@ -395,14 +467,22 @@ int sosend_generic(struct socket *so, struct sockaddr *addr,
|
|||
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 *so, int which);
|
||||
void soupcall_set(struct socket *so, int which,
|
||||
int (*func)(struct socket *, void *, int), void *arg);
|
||||
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 *);
|
||||
void sowakeup(struct socket *so, struct sockbuf *sb);
|
||||
void sowakeup_aio(struct socket *so, struct sockbuf *sb);
|
||||
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).
|
||||
|
|
@ -419,4 +499,52 @@ int accept_filt_generic_mod_event(module_t mod, int event, void *data);
|
|||
|
||||
#endif /* _KERNEL */
|
||||
|
||||
/*
|
||||
* Structure to export socket from kernel to utilities, via sysctl(3).
|
||||
*/
|
||||
struct xsocket {
|
||||
ksize_t xso_len; /* length of this structure */
|
||||
kvaddr_t xso_so; /* kernel address of struct socket */
|
||||
kvaddr_t so_pcb; /* kernel address of struct inpcb */
|
||||
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_ */
|
||||
|
|
|
|||
Loading…
Reference in New Issue