[PULLv3,15/32] slirp: move QEMU state saving to a separate unit

Message ID	20190205182848.29887-16-samuel.thibault@ens-lyon.org (mailing list archive)
State	New, archived
Headers	show Return-Path: <qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org> From: Samuel Thibault <samuel.thibault@ens-lyon.org> To: qemu-devel@nongnu.org, peter.maydell@linaro.org Date: Tue, 5 Feb 2019 20:28:31 +0200 Message-Id: <20190205182848.29887-16-samuel.thibault@ens-lyon.org> In-Reply-To: <20190205182848.29887-1-samuel.thibault@ens-lyon.org> References: <20190205182848.29887-1-samuel.thibault@ens-lyon.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PULLv3 15/32] slirp: move QEMU state saving to a separate unit Precedence: list Cc: =?utf-8?q?Marc-Andr=C3=A9_Lureau?= <marcandre.lureau@redhat.com>, Samuel Thibault <samuel.thibault@ens-lyon.org>, stefanha@redhat.com, jan.kiszka@siemens.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" <qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org>
Series	[PULLv3,01/32] slirp: Avoid unaligned 16bit memory access \| expand [PULLv3,01/32] slirp: Avoid unaligned 16bit memory access [PULLv3,02/32] slirp: Avoid marking naturally packed structs as QEMU_PACKED [PULLv3,03/32] slirp: Don't mark struct ipq or struct ipasfrag as packed [PULLv3,04/32] slirp: generalize guestfwd with a callback based approach [PULLv3,05/32] net/slirp: simplify checking for cmd: prefix [PULLv3,06/32] net/slirp: free forwarding rules on cleanup [PULLv3,07/32] net/slirp: fix leaks on forwarding rule registration error [PULLv3,08/32] slirp: add callbacks for timer [PULLv3,09/32] slirp: replace trace functions with DEBUG calls [PULLv3,10/32] slirp: replace QEMU_PACKED with SLIRP_PACKED [PULLv3,11/32] slirp: replace most qemu socket utilities with slirp own version [PULLv3,12/32] slirp: replace qemu_set_nonblock() [PULLv3,13/32] slirp: add unregister_poll_fd() callback [PULLv3,14/32] slirp: replace qemu_notify_event() with a callback [PULLv3,15/32] slirp: move QEMU state saving to a separate unit [PULLv3,16/32] slirp: do not include qemu headers in libslirp.h public API header [PULLv3,17/32] slirp: improve windows headers inclusion [PULLv3,18/32] slirp: add slirp own version of pstrcpy [PULLv3,19/32] slirp: remove qemu timer.h dependency [PULLv3,20/32] slirp: remove now useless QEMU headers inclusions [PULLv3,21/32] slirp: replace net/eth.h inclusion with own defines [PULLv3,22/32] slirp: replace qemu qtailq with slirp own copy [PULLv3,23/32] slirp: replace QEMU_BUILD_BUG_ON with G_STATIC_ASSERT [PULLv3,24/32] slirp: Move g_spawn_async_with_fds_qemu compatibility to slirp/ [PULLv3,25/32] slirp: replace remaining qemu headers dependency [PULLv3,26/32] slirp: prefer c99 types over BSD kind [PULLv3,27/32] slirp: improve send_packet() callback [PULLv3,28/32] slirp: replace global polling with per-instance & notifier [PULLv3,29/32] slirp: remove slirp_instances list [PULLv3,30/32] slirp: use polling callbacks, drop glib requirement [PULLv3,31/32] slirp: pass opaque to all callbacks [PULLv3,32/32] slirp: API is extern C

diff --git a/slirp/Makefile.objs b/slirp/Makefile.objs index d2ead94b3b..88340a583b 100644 --- a/slirp/Makefile.objs +++ b/slirp/Makefile.objs @@ -20,6 +20,7 @@ slirp.mo-objs = \ sbuf.o \ slirp.o \ socket.o \ + state.o \ tcp_input.o \ tcp_output.o \ tcp_subr.o \ diff --git a/slirp/slirp.c b/slirp/slirp.c index f0bd59fd6f..9ec1e4c62f 100644 --- a/slirp/slirp.c +++ b/slirp/slirp.c @@ -30,6 +30,10 @@ #include "hw/hw.h" #include "qemu/cutils.h" +#ifdef WITH_QEMU +#include "state.h" +#endif + #ifndef _WIN32 #include <net/if.h> #endif @@ -278,14 +282,6 @@ static void slirp_init_once(void) } -static void slirp_state_save(QEMUFile *f, void *opaque); -static int slirp_state_load(QEMUFile *f, void *opaque, int version_id); - -static SaveVMHandlers savevm_slirp_state = { - .save_state = slirp_state_save, - .load_state = slirp_state_load, -}; - Slirp *slirp_init(int restricted, bool in_enabled, struct in_addr vnetwork, struct in_addr vnetmask, struct in_addr vhost, bool in6_enabled, @@ -341,8 +337,9 @@ Slirp *slirp_init(int restricted, bool in_enabled, struct in_addr vnetwork, slirp->opaque = opaque; - register_savevm_live(NULL, "slirp", 0, 4, &savevm_slirp_state, slirp); - +#ifdef WITH_QEMU + slirp_state_register(slirp); +#endif QTAILQ_INSERT_TAIL(&slirp_instances, slirp, entry); return slirp; @@ -359,9 +356,9 @@ void slirp_cleanup(Slirp *slirp) } QTAILQ_REMOVE(&slirp_instances, slirp, entry); - - unregister_savevm(NULL, "slirp", slirp); - +#ifdef WITH_QEMU + slirp_state_unregister(slirp); +#endif ip_cleanup(slirp); ip6_cleanup(slirp); m_cleanup(slirp); @@ -1115,7 +1112,7 @@ ssize_t slirp_send(struct socket *so, const void *buf, size_t len, int flags) return send(so->s, buf, len, flags); } -static struct socket * +struct socket * slirp_find_ctl_socket(Slirp *slirp, struct in_addr guest_addr, int guest_port) { struct socket *so; @@ -1162,350 +1159,3 @@ void slirp_socket_recv(Slirp *slirp, struct in_addr guest_addr, int guest_port, if (ret > 0) tcp_output(sototcpcb(so)); } - -static int slirp_tcp_post_load(void *opaque, int version) -{ - tcp_template((struct tcpcb *)opaque); - - return 0; -} - -static const VMStateDescription vmstate_slirp_tcp = { - .name = "slirp-tcp", - .version_id = 0, - .post_load = slirp_tcp_post_load, - .fields = (VMStateField[]) { - VMSTATE_INT16(t_state, struct tcpcb), - VMSTATE_INT16_ARRAY(t_timer, struct tcpcb, TCPT_NTIMERS), - VMSTATE_INT16(t_rxtshift, struct tcpcb), - VMSTATE_INT16(t_rxtcur, struct tcpcb), - VMSTATE_INT16(t_dupacks, struct tcpcb), - VMSTATE_UINT16(t_maxseg, struct tcpcb), - VMSTATE_UINT8(t_force, struct tcpcb), - VMSTATE_UINT16(t_flags, struct tcpcb), - VMSTATE_UINT32(snd_una, struct tcpcb), - VMSTATE_UINT32(snd_nxt, struct tcpcb), - VMSTATE_UINT32(snd_up, struct tcpcb), - VMSTATE_UINT32(snd_wl1, struct tcpcb), - VMSTATE_UINT32(snd_wl2, struct tcpcb), - VMSTATE_UINT32(iss, struct tcpcb), - VMSTATE_UINT32(snd_wnd, struct tcpcb), - VMSTATE_UINT32(rcv_wnd, struct tcpcb), - VMSTATE_UINT32(rcv_nxt, struct tcpcb), - VMSTATE_UINT32(rcv_up, struct tcpcb), - VMSTATE_UINT32(irs, struct tcpcb), - VMSTATE_UINT32(rcv_adv, struct tcpcb), - VMSTATE_UINT32(snd_max, struct tcpcb), - VMSTATE_UINT32(snd_cwnd, struct tcpcb), - VMSTATE_UINT32(snd_ssthresh, struct tcpcb), - VMSTATE_INT16(t_idle, struct tcpcb), - VMSTATE_INT16(t_rtt, struct tcpcb), - VMSTATE_UINT32(t_rtseq, struct tcpcb), - VMSTATE_INT16(t_srtt, struct tcpcb), - VMSTATE_INT16(t_rttvar, struct tcpcb), - VMSTATE_UINT16(t_rttmin, struct tcpcb), - VMSTATE_UINT32(max_sndwnd, struct tcpcb), - VMSTATE_UINT8(t_oobflags, struct tcpcb), - VMSTATE_UINT8(t_iobc, struct tcpcb), - VMSTATE_INT16(t_softerror, struct tcpcb), - VMSTATE_UINT8(snd_scale, struct tcpcb), - VMSTATE_UINT8(rcv_scale, struct tcpcb), - VMSTATE_UINT8(request_r_scale, struct tcpcb), - VMSTATE_UINT8(requested_s_scale, struct tcpcb), - VMSTATE_UINT32(ts_recent, struct tcpcb), - VMSTATE_UINT32(ts_recent_age, struct tcpcb), - VMSTATE_UINT32(last_ack_sent, struct tcpcb), - VMSTATE_END_OF_LIST() - } -}; - -/* The sbuf has a pair of pointers that are migrated as offsets; - * we calculate the offsets and restore the pointers using - * pre_save/post_load on a tmp structure. - */ -struct sbuf_tmp { - struct sbuf *parent; - uint32_t roff, woff; -}; - -static int sbuf_tmp_pre_save(void *opaque) -{ - struct sbuf_tmp *tmp = opaque; - tmp->woff = tmp->parent->sb_wptr - tmp->parent->sb_data; - tmp->roff = tmp->parent->sb_rptr - tmp->parent->sb_data; - - return 0; -} - -static int sbuf_tmp_post_load(void *opaque, int version) -{ - struct sbuf_tmp *tmp = opaque; - uint32_t requested_len = tmp->parent->sb_datalen; - - /* Allocate the buffer space used by the field after the tmp */ - sbreserve(tmp->parent, tmp->parent->sb_datalen); - - if (tmp->parent->sb_datalen != requested_len) { - return -ENOMEM; - } - if (tmp->woff >= requested_len || - tmp->roff >= requested_len) { - g_critical("invalid sbuf offsets r/w=%u/%u len=%u", - tmp->roff, tmp->woff, requested_len); - return -EINVAL; - } - - tmp->parent->sb_wptr = tmp->parent->sb_data + tmp->woff; - tmp->parent->sb_rptr = tmp->parent->sb_data + tmp->roff; - - return 0; -} - - -static const VMStateDescription vmstate_slirp_sbuf_tmp = { - .name = "slirp-sbuf-tmp", - .post_load = sbuf_tmp_post_load, - .pre_save = sbuf_tmp_pre_save, - .version_id = 0, - .fields = (VMStateField[]) { - VMSTATE_UINT32(woff, struct sbuf_tmp), - VMSTATE_UINT32(roff, struct sbuf_tmp), - VMSTATE_END_OF_LIST() - } -}; - -static const VMStateDescription vmstate_slirp_sbuf = { - .name = "slirp-sbuf", - .version_id = 0, - .fields = (VMStateField[]) { - VMSTATE_UINT32(sb_cc, struct sbuf), - VMSTATE_UINT32(sb_datalen, struct sbuf), - VMSTATE_WITH_TMP(struct sbuf, struct sbuf_tmp, vmstate_slirp_sbuf_tmp), - VMSTATE_VBUFFER_UINT32(sb_data, struct sbuf, 0, NULL, sb_datalen), - VMSTATE_END_OF_LIST() - } -}; - -static bool slirp_older_than_v4(void *opaque, int version_id) -{ - return version_id < 4; -} - -static bool slirp_family_inet(void *opaque, int version_id) -{ - union slirp_sockaddr *ssa = (union slirp_sockaddr *)opaque; - return ssa->ss.ss_family == AF_INET; -} - -static int slirp_socket_pre_load(void *opaque) -{ - struct socket *so = opaque; - if (tcp_attach(so) < 0) { - return -ENOMEM; - } - /* Older versions don't load these fields */ - so->so_ffamily = AF_INET; - so->so_lfamily = AF_INET; - return 0; -} - -#ifndef _WIN32 -#define VMSTATE_SIN4_ADDR(f, s, t) VMSTATE_UINT32_TEST(f, s, t) -#else -/* Win uses u_long rather than uint32_t - but it's still 32bits long */ -#define VMSTATE_SIN4_ADDR(f, s, t) VMSTATE_SINGLE_TEST(f, s, t, 0, \ - vmstate_info_uint32, u_long) -#endif - -/* The OS provided ss_family field isn't that portable; it's size - * and type varies (16/8 bit, signed, unsigned) - * and the values it contains aren't fully portable. - */ -typedef struct SS_FamilyTmpStruct { - union slirp_sockaddr *parent; - uint16_t portable_family; -} SS_FamilyTmpStruct; - -#define SS_FAMILY_MIG_IPV4 2 /* Linux, BSD, Win... */ -#define SS_FAMILY_MIG_IPV6 10 /* Linux */ -#define SS_FAMILY_MIG_OTHER 0xffff - -static int ss_family_pre_save(void *opaque) -{ - SS_FamilyTmpStruct *tss = opaque; - - tss->portable_family = SS_FAMILY_MIG_OTHER; - - if (tss->parent->ss.ss_family == AF_INET) { - tss->portable_family = SS_FAMILY_MIG_IPV4; - } else if (tss->parent->ss.ss_family == AF_INET6) { - tss->portable_family = SS_FAMILY_MIG_IPV6; - } - - return 0; -} - -static int ss_family_post_load(void *opaque, int version_id) -{ - SS_FamilyTmpStruct *tss = opaque; - - switch (tss->portable_family) { - case SS_FAMILY_MIG_IPV4: - tss->parent->ss.ss_family = AF_INET; - break; - case SS_FAMILY_MIG_IPV6: - case 23: /* compatibility: AF_INET6 from mingw */ - case 28: /* compatibility: AF_INET6 from FreeBSD sys/socket.h */ - tss->parent->ss.ss_family = AF_INET6; - break; - default: - g_critical("invalid ss_family type %x", tss->portable_family); - return -EINVAL; - } - - return 0; -} - -static const VMStateDescription vmstate_slirp_ss_family = { - .name = "slirp-socket-addr/ss_family", - .pre_save = ss_family_pre_save, - .post_load = ss_family_post_load, - .fields = (VMStateField[]) { - VMSTATE_UINT16(portable_family, SS_FamilyTmpStruct), - VMSTATE_END_OF_LIST() - } -}; - -static const VMStateDescription vmstate_slirp_socket_addr = { - .name = "slirp-socket-addr", - .version_id = 4, - .fields = (VMStateField[]) { - VMSTATE_WITH_TMP(union slirp_sockaddr, SS_FamilyTmpStruct, - vmstate_slirp_ss_family), - VMSTATE_SIN4_ADDR(sin.sin_addr.s_addr, union slirp_sockaddr, - slirp_family_inet), - VMSTATE_UINT16_TEST(sin.sin_port, union slirp_sockaddr, - slirp_family_inet), - -#if 0 - /* Untested: Needs checking by someone with IPv6 test */ - VMSTATE_BUFFER_TEST(sin6.sin6_addr, union slirp_sockaddr, - slirp_family_inet6), - VMSTATE_UINT16_TEST(sin6.sin6_port, union slirp_sockaddr, - slirp_family_inet6), - VMSTATE_UINT32_TEST(sin6.sin6_flowinfo, union slirp_sockaddr, - slirp_family_inet6), - VMSTATE_UINT32_TEST(sin6.sin6_scope_id, union slirp_sockaddr, - slirp_family_inet6), -#endif - - VMSTATE_END_OF_LIST() - } -}; - -static const VMStateDescription vmstate_slirp_socket = { - .name = "slirp-socket", - .version_id = 4, - .pre_load = slirp_socket_pre_load, - .fields = (VMStateField[]) { - VMSTATE_UINT32(so_urgc, struct socket), - /* Pre-v4 versions */ - VMSTATE_SIN4_ADDR(so_faddr.s_addr, struct socket, - slirp_older_than_v4), - VMSTATE_SIN4_ADDR(so_laddr.s_addr, struct socket, - slirp_older_than_v4), - VMSTATE_UINT16_TEST(so_fport, struct socket, slirp_older_than_v4), - VMSTATE_UINT16_TEST(so_lport, struct socket, slirp_older_than_v4), - /* v4 and newer */ - VMSTATE_STRUCT(fhost, struct socket, 4, vmstate_slirp_socket_addr, - union slirp_sockaddr), - VMSTATE_STRUCT(lhost, struct socket, 4, vmstate_slirp_socket_addr, - union slirp_sockaddr), - - VMSTATE_UINT8(so_iptos, struct socket), - VMSTATE_UINT8(so_emu, struct socket), - VMSTATE_UINT8(so_type, struct socket), - VMSTATE_INT32(so_state, struct socket), - VMSTATE_STRUCT(so_rcv, struct socket, 0, vmstate_slirp_sbuf, - struct sbuf), - VMSTATE_STRUCT(so_snd, struct socket, 0, vmstate_slirp_sbuf, - struct sbuf), - VMSTATE_STRUCT_POINTER(so_tcpcb, struct socket, vmstate_slirp_tcp, - struct tcpcb), - VMSTATE_END_OF_LIST() - } -}; - -static const VMStateDescription vmstate_slirp_bootp_client = { - .name = "slirp_bootpclient", - .fields = (VMStateField[]) { - VMSTATE_UINT16(allocated, BOOTPClient), - VMSTATE_BUFFER(macaddr, BOOTPClient), - VMSTATE_END_OF_LIST() - } -}; - -static const VMStateDescription vmstate_slirp = { - .name = "slirp", - .version_id = 4, - .fields = (VMStateField[]) { - VMSTATE_UINT16_V(ip_id, Slirp, 2), - VMSTATE_STRUCT_ARRAY(bootp_clients, Slirp, NB_BOOTP_CLIENTS, 3, - vmstate_slirp_bootp_client, BOOTPClient), - VMSTATE_END_OF_LIST() - } -}; - -static void slirp_state_save(QEMUFile *f, void *opaque) -{ - Slirp *slirp = opaque; - struct gfwd_list *ex_ptr; - - for (ex_ptr = slirp->guestfwd_list; ex_ptr; ex_ptr = ex_ptr->ex_next) - if (ex_ptr->write_cb) { - struct socket *so; - so = slirp_find_ctl_socket(slirp, ex_ptr->ex_addr, - ntohs(ex_ptr->ex_fport)); - if (!so) - continue; - - qemu_put_byte(f, 42); - vmstate_save_state(f, &vmstate_slirp_socket, so, NULL); - } - qemu_put_byte(f, 0); - - vmstate_save_state(f, &vmstate_slirp, slirp, NULL); -} - - -static int slirp_state_load(QEMUFile *f, void *opaque, int version_id) -{ - Slirp *slirp = opaque; - struct gfwd_list *ex_ptr; - - while (qemu_get_byte(f)) { - int ret; - struct socket *so = socreate(slirp); - - ret = vmstate_load_state(f, &vmstate_slirp_socket, so, version_id); - - if (ret < 0) - return ret; - - if ((so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) != - slirp->vnetwork_addr.s_addr) { - return -EINVAL; - } - for (ex_ptr = slirp->guestfwd_list; ex_ptr; ex_ptr = ex_ptr->ex_next) { - if (ex_ptr->write_cb && - so->so_faddr.s_addr == ex_ptr->ex_addr.s_addr && - so->so_fport == ex_ptr->ex_fport) { - break; - } - } - if (!ex_ptr) - return -EINVAL; - } - - return vmstate_load_state(f, &vmstate_slirp, slirp, version_id); -} diff --git a/slirp/slirp.h b/slirp/slirp.h index 67ff4d610c..8d9d72ca9d 100644 --- a/slirp/slirp.h +++ b/slirp/slirp.h @@ -271,4 +271,7 @@ int tcp_emu(struct socket *, struct mbuf *); int tcp_ctl(struct socket *); struct tcpcb *tcp_drop(struct tcpcb *tp, int err); +struct socket * +slirp_find_ctl_socket(Slirp *slirp, struct in_addr guest_addr, int guest_port); + #endif diff --git a/slirp/state.c b/slirp/state.c new file mode 100644 index 0000000000..0e5a706e87 --- /dev/null +++ b/slirp/state.c @@ -0,0 +1,394 @@ +/* + * libslirp + * + * Copyright (c) 2004-2008 Fabrice Bellard + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +#include "qemu/osdep.h" + +#include "slirp.h" +#include "state.h" +#include "migration/vmstate.h" +#include "migration/qemu-file-types.h" +#include "migration/register.h" + +static int slirp_tcp_post_load(void *opaque, int version) +{ + tcp_template((struct tcpcb *)opaque); + + return 0; +} + +static const VMStateDescription vmstate_slirp_tcp = { + .name = "slirp-tcp", + .version_id = 0, + .post_load = slirp_tcp_post_load, + .fields = (VMStateField[]) { + VMSTATE_INT16(t_state, struct tcpcb), + VMSTATE_INT16_ARRAY(t_timer, struct tcpcb, TCPT_NTIMERS), + VMSTATE_INT16(t_rxtshift, struct tcpcb), + VMSTATE_INT16(t_rxtcur, struct tcpcb), + VMSTATE_INT16(t_dupacks, struct tcpcb), + VMSTATE_UINT16(t_maxseg, struct tcpcb), + VMSTATE_UINT8(t_force, struct tcpcb), + VMSTATE_UINT16(t_flags, struct tcpcb), + VMSTATE_UINT32(snd_una, struct tcpcb), + VMSTATE_UINT32(snd_nxt, struct tcpcb), + VMSTATE_UINT32(snd_up, struct tcpcb), + VMSTATE_UINT32(snd_wl1, struct tcpcb), + VMSTATE_UINT32(snd_wl2, struct tcpcb), + VMSTATE_UINT32(iss, struct tcpcb), + VMSTATE_UINT32(snd_wnd, struct tcpcb), + VMSTATE_UINT32(rcv_wnd, struct tcpcb), + VMSTATE_UINT32(rcv_nxt, struct tcpcb), + VMSTATE_UINT32(rcv_up, struct tcpcb), + VMSTATE_UINT32(irs, struct tcpcb), + VMSTATE_UINT32(rcv_adv, struct tcpcb), + VMSTATE_UINT32(snd_max, struct tcpcb), + VMSTATE_UINT32(snd_cwnd, struct tcpcb), + VMSTATE_UINT32(snd_ssthresh, struct tcpcb), + VMSTATE_INT16(t_idle, struct tcpcb), + VMSTATE_INT16(t_rtt, struct tcpcb), + VMSTATE_UINT32(t_rtseq, struct tcpcb), + VMSTATE_INT16(t_srtt, struct tcpcb), + VMSTATE_INT16(t_rttvar, struct tcpcb), + VMSTATE_UINT16(t_rttmin, struct tcpcb), + VMSTATE_UINT32(max_sndwnd, struct tcpcb), + VMSTATE_UINT8(t_oobflags, struct tcpcb), + VMSTATE_UINT8(t_iobc, struct tcpcb), + VMSTATE_INT16(t_softerror, struct tcpcb), + VMSTATE_UINT8(snd_scale, struct tcpcb), + VMSTATE_UINT8(rcv_scale, struct tcpcb), + VMSTATE_UINT8(request_r_scale, struct tcpcb), + VMSTATE_UINT8(requested_s_scale, struct tcpcb), + VMSTATE_UINT32(ts_recent, struct tcpcb), + VMSTATE_UINT32(ts_recent_age, struct tcpcb), + VMSTATE_UINT32(last_ack_sent, struct tcpcb), + VMSTATE_END_OF_LIST() + } +}; + +/* The sbuf has a pair of pointers that are migrated as offsets; + * we calculate the offsets and restore the pointers using + * pre_save/post_load on a tmp structure. + */ +struct sbuf_tmp { + struct sbuf *parent; + uint32_t roff, woff; +}; + +static int sbuf_tmp_pre_save(void *opaque) +{ + struct sbuf_tmp *tmp = opaque; + tmp->woff = tmp->parent->sb_wptr - tmp->parent->sb_data; + tmp->roff = tmp->parent->sb_rptr - tmp->parent->sb_data; + + return 0; +} + +static int sbuf_tmp_post_load(void *opaque, int version) +{ + struct sbuf_tmp *tmp = opaque; + uint32_t requested_len = tmp->parent->sb_datalen; + + /* Allocate the buffer space used by the field after the tmp */ + sbreserve(tmp->parent, tmp->parent->sb_datalen); + + if (tmp->parent->sb_datalen != requested_len) { + return -ENOMEM; + } + if (tmp->woff >= requested_len || + tmp->roff >= requested_len) { + g_critical("invalid sbuf offsets r/w=%u/%u len=%u", + tmp->roff, tmp->woff, requested_len); + return -EINVAL; + } + + tmp->parent->sb_wptr = tmp->parent->sb_data + tmp->woff; + tmp->parent->sb_rptr = tmp->parent->sb_data + tmp->roff; + + return 0; +} + + +static const VMStateDescription vmstate_slirp_sbuf_tmp = { + .name = "slirp-sbuf-tmp", + .post_load = sbuf_tmp_post_load, + .pre_save = sbuf_tmp_pre_save, + .version_id = 0, + .fields = (VMStateField[]) { + VMSTATE_UINT32(woff, struct sbuf_tmp), + VMSTATE_UINT32(roff, struct sbuf_tmp), + VMSTATE_END_OF_LIST() + } +}; + +static const VMStateDescription vmstate_slirp_sbuf = { + .name = "slirp-sbuf", + .version_id = 0, + .fields = (VMStateField[]) { + VMSTATE_UINT32(sb_cc, struct sbuf), + VMSTATE_UINT32(sb_datalen, struct sbuf), + VMSTATE_WITH_TMP(struct sbuf, struct sbuf_tmp, vmstate_slirp_sbuf_tmp), + VMSTATE_VBUFFER_UINT32(sb_data, struct sbuf, 0, NULL, sb_datalen), + VMSTATE_END_OF_LIST() + } +}; + +static bool slirp_older_than_v4(void *opaque, int version_id) +{ + return version_id < 4; +} + +static bool slirp_family_inet(void *opaque, int version_id) +{ + union slirp_sockaddr *ssa = (union slirp_sockaddr *)opaque; + return ssa->ss.ss_family == AF_INET; +} + +static int slirp_socket_pre_load(void *opaque) +{ + struct socket *so = opaque; + if (tcp_attach(so) < 0) { + return -ENOMEM; + } + /* Older versions don't load these fields */ + so->so_ffamily = AF_INET; + so->so_lfamily = AF_INET; + return 0; +} + +#ifndef _WIN32 +#define VMSTATE_SIN4_ADDR(f, s, t) VMSTATE_UINT32_TEST(f, s, t) +#else +/* Win uses u_long rather than uint32_t - but it's still 32bits long */ +#define VMSTATE_SIN4_ADDR(f, s, t) VMSTATE_SINGLE_TEST(f, s, t, 0, \ + vmstate_info_uint32, u_long) +#endif + +/* The OS provided ss_family field isn't that portable; it's size + * and type varies (16/8 bit, signed, unsigned) + * and the values it contains aren't fully portable. + */ +typedef struct SS_FamilyTmpStruct { + union slirp_sockaddr *parent; + uint16_t portable_family; +} SS_FamilyTmpStruct; + +#define SS_FAMILY_MIG_IPV4 2 /* Linux, BSD, Win... */ +#define SS_FAMILY_MIG_IPV6 10 /* Linux */ +#define SS_FAMILY_MIG_OTHER 0xffff + +static int ss_family_pre_save(void *opaque) +{ + SS_FamilyTmpStruct *tss = opaque; + + tss->portable_family = SS_FAMILY_MIG_OTHER; + + if (tss->parent->ss.ss_family == AF_INET) { + tss->portable_family = SS_FAMILY_MIG_IPV4; + } else if (tss->parent->ss.ss_family == AF_INET6) { + tss->portable_family = SS_FAMILY_MIG_IPV6; + } + + return 0; +} + +static int ss_family_post_load(void *opaque, int version_id) +{ + SS_FamilyTmpStruct *tss = opaque; + + switch (tss->portable_family) { + case SS_FAMILY_MIG_IPV4: + tss->parent->ss.ss_family = AF_INET; + break; + case SS_FAMILY_MIG_IPV6: + case 23: /* compatibility: AF_INET6 from mingw */ + case 28: /* compatibility: AF_INET6 from FreeBSD sys/socket.h */ + tss->parent->ss.ss_family = AF_INET6; + break; + default: + g_critical("invalid ss_family type %x", tss->portable_family); + return -EINVAL; + } + + return 0; +} + +static const VMStateDescription vmstate_slirp_ss_family = { + .name = "slirp-socket-addr/ss_family", + .pre_save = ss_family_pre_save, + .post_load = ss_family_post_load, + .fields = (VMStateField[]) { + VMSTATE_UINT16(portable_family, SS_FamilyTmpStruct), + VMSTATE_END_OF_LIST() + } +}; + +static const VMStateDescription vmstate_slirp_socket_addr = { + .name = "slirp-socket-addr", + .version_id = 4, + .fields = (VMStateField[]) { + VMSTATE_WITH_TMP(union slirp_sockaddr, SS_FamilyTmpStruct, + vmstate_slirp_ss_family), + VMSTATE_SIN4_ADDR(sin.sin_addr.s_addr, union slirp_sockaddr, + slirp_family_inet), + VMSTATE_UINT16_TEST(sin.sin_port, union slirp_sockaddr, + slirp_family_inet), + +#if 0 + /* Untested: Needs checking by someone with IPv6 test */ + VMSTATE_BUFFER_TEST(sin6.sin6_addr, union slirp_sockaddr, + slirp_family_inet6), + VMSTATE_UINT16_TEST(sin6.sin6_port, union slirp_sockaddr, + slirp_family_inet6), + VMSTATE_UINT32_TEST(sin6.sin6_flowinfo, union slirp_sockaddr, + slirp_family_inet6), + VMSTATE_UINT32_TEST(sin6.sin6_scope_id, union slirp_sockaddr, + slirp_family_inet6), +#endif + + VMSTATE_END_OF_LIST() + } +}; + +static const VMStateDescription vmstate_slirp_socket = { + .name = "slirp-socket", + .version_id = 4, + .pre_load = slirp_socket_pre_load, + .fields = (VMStateField[]) { + VMSTATE_UINT32(so_urgc, struct socket), + /* Pre-v4 versions */ + VMSTATE_SIN4_ADDR(so_faddr.s_addr, struct socket, + slirp_older_than_v4), + VMSTATE_SIN4_ADDR(so_laddr.s_addr, struct socket, + slirp_older_than_v4), + VMSTATE_UINT16_TEST(so_fport, struct socket, slirp_older_than_v4), + VMSTATE_UINT16_TEST(so_lport, struct socket, slirp_older_than_v4), + /* v4 and newer */ + VMSTATE_STRUCT(fhost, struct socket, 4, vmstate_slirp_socket_addr, + union slirp_sockaddr), + VMSTATE_STRUCT(lhost, struct socket, 4, vmstate_slirp_socket_addr, + union slirp_sockaddr), + + VMSTATE_UINT8(so_iptos, struct socket), + VMSTATE_UINT8(so_emu, struct socket), + VMSTATE_UINT8(so_type, struct socket), + VMSTATE_INT32(so_state, struct socket), + VMSTATE_STRUCT(so_rcv, struct socket, 0, vmstate_slirp_sbuf, + struct sbuf), + VMSTATE_STRUCT(so_snd, struct socket, 0, vmstate_slirp_sbuf, + struct sbuf), + VMSTATE_STRUCT_POINTER(so_tcpcb, struct socket, vmstate_slirp_tcp, + struct tcpcb), + VMSTATE_END_OF_LIST() + } +}; + +static const VMStateDescription vmstate_slirp_bootp_client = { + .name = "slirp_bootpclient", + .fields = (VMStateField[]) { + VMSTATE_UINT16(allocated, BOOTPClient), + VMSTATE_BUFFER(macaddr, BOOTPClient), + VMSTATE_END_OF_LIST() + } +}; + +static const VMStateDescription vmstate_slirp = { + .name = "slirp", + .version_id = 4, + .fields = (VMStateField[]) { + VMSTATE_UINT16_V(ip_id, Slirp, 2), + VMSTATE_STRUCT_ARRAY(bootp_clients, Slirp, NB_BOOTP_CLIENTS, 3, + vmstate_slirp_bootp_client, BOOTPClient), + VMSTATE_END_OF_LIST() + } +}; + +static void slirp_state_save(QEMUFile *f, void *opaque) +{ + Slirp *slirp = opaque; + struct gfwd_list *ex_ptr; + + for (ex_ptr = slirp->guestfwd_list; ex_ptr; ex_ptr = ex_ptr->ex_next) + if (ex_ptr->write_cb) { + struct socket *so; + so = slirp_find_ctl_socket(slirp, ex_ptr->ex_addr, + ntohs(ex_ptr->ex_fport)); + if (!so) { + continue; + } + + qemu_put_byte(f, 42); + vmstate_save_state(f, &vmstate_slirp_socket, so, NULL); + } + qemu_put_byte(f, 0); + + vmstate_save_state(f, &vmstate_slirp, slirp, NULL); +} + + +static int slirp_state_load(QEMUFile *f, void *opaque, int version_id) +{ + Slirp *slirp = opaque; + struct gfwd_list *ex_ptr; + + while (qemu_get_byte(f)) { + int ret; + struct socket *so = socreate(slirp); + + ret = vmstate_load_state(f, &vmstate_slirp_socket, so, version_id); + if (ret < 0) { + return ret; + } + + if ((so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) != + slirp->vnetwork_addr.s_addr) { + return -EINVAL; + } + for (ex_ptr = slirp->guestfwd_list; ex_ptr; ex_ptr = ex_ptr->ex_next) { + if (ex_ptr->write_cb && + so->so_faddr.s_addr == ex_ptr->ex_addr.s_addr && + so->so_fport == ex_ptr->ex_fport) { + break; + } + } + if (!ex_ptr) { + return -EINVAL; + } + } + + return vmstate_load_state(f, &vmstate_slirp, slirp, version_id); +} + +void slirp_state_register(Slirp *slirp) +{ + static SaveVMHandlers savevm_slirp_state = { + .save_state = slirp_state_save, + .load_state = slirp_state_load, + }; + + register_savevm_live(NULL, "slirp", 0, 4, &savevm_slirp_state, slirp); +} + +void slirp_state_unregister(Slirp *slirp) +{ + unregister_savevm(NULL, "slirp", slirp); +} diff --git a/slirp/state.h b/slirp/state.h new file mode 100644 index 0000000000..154866898f --- /dev/null +++ b/slirp/state.h @@ -0,0 +1,9 @@ +#ifndef SLIRP_STATE_H_ +#define SLIRP_STATE_H_ + +#include "libslirp.h" + +void slirp_state_register(Slirp *slirp); +void slirp_state_unregister(Slirp *slirp); + +#endif /* SLIRP_STATE_H_ */

[PULLv3,15/32] slirp: move QEMU state saving to a separate unit

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