From patchwork Thu Feb 7 14:02:48 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Samuel Thibault X-Patchwork-Id: 10801351 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E7F0913A4 for ; Thu, 7 Feb 2019 14:27:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D65962D9CD for ; Thu, 7 Feb 2019 14:27:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CA6412D9D5; Thu, 7 Feb 2019 14:27:00 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 018BE2D9CD for ; Thu, 7 Feb 2019 14:27:00 +0000 (UTC) Received: from localhost ([127.0.0.1]:40915 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1grkdn-0003FP-5y for patchwork-qemu-devel@patchwork.kernel.org; Thu, 07 Feb 2019 09:26:59 -0500 Received: from eggs.gnu.org ([209.51.188.92]:57473) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1grkHV-00027M-1w for qemu-devel@nongnu.org; Thu, 07 Feb 2019 09:04:04 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1grkHP-0000yI-TK for qemu-devel@nongnu.org; Thu, 07 Feb 2019 09:03:56 -0500 Received: from hera.aquilenet.fr ([185.233.100.1]:41618) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1grkHN-0000mk-Nr for qemu-devel@nongnu.org; Thu, 07 Feb 2019 09:03:51 -0500 Received: from localhost (localhost [127.0.0.1]) by hera.aquilenet.fr (Postfix) with ESMTP id 35AF9CD08; Thu, 7 Feb 2019 15:03:24 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at aquilenet.fr Received: from hera.aquilenet.fr ([127.0.0.1]) by localhost (hera.aquilenet.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 0FZuO3obu4Y4; Thu, 7 Feb 2019 15:03:22 +0100 (CET) Received: from function (unknown [160.40.205.85]) by hera.aquilenet.fr (Postfix) with ESMTPSA id B34F5CD1D; Thu, 7 Feb 2019 15:03:18 +0100 (CET) Received: from samy by function with local (Exim 4.92-RC4) (envelope-from ) id 1grkGq-0004D6-Th; Thu, 07 Feb 2019 15:03:16 +0100 From: Samuel Thibault To: qemu-devel@nongnu.org, peter.maydell@linaro.org Date: Thu, 7 Feb 2019 16:02:48 +0200 Message-Id: <20190207140316.16103-5-samuel.thibault@ens-lyon.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190207140316.16103-1-samuel.thibault@ens-lyon.org> References: <20190207140316.16103-1-samuel.thibault@ens-lyon.org> MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 185.233.100.1 Subject: [Qemu-devel] [PULLv4 04/32] slirp: generalize guestfwd with a callback based approach X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Samuel Thibault , stefanha@redhat.com, jan.kiszka@siemens.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Marc-André Lureau Instead of calling into QEMU chardev directly, and mixing it with slirp_add_exec() handling, add a new function slirp_add_guestfwd() which takes a write callback. Signed-off-by: Marc-André Lureau Signed-off-by: Samuel Thibault --- net/slirp.c | 14 ++++++++++---- slirp/libslirp.h | 6 +++++- slirp/misc.c | 37 +++++++++++++++++++++++-------------- slirp/misc.h | 15 +++++++++++++-- slirp/slirp.c | 27 +++++++++++++++++++-------- slirp/socket.h | 4 +++- slirp/tcp_subr.c | 4 ++-- 7 files changed, 75 insertions(+), 32 deletions(-) diff --git a/net/slirp.c b/net/slirp.c index f98425ee9f..ec07f662c0 100644 --- a/net/slirp.c +++ b/net/slirp.c @@ -704,8 +704,8 @@ static int slirp_smb(SlirpState* s, const char *exported_dir, CONFIG_SMBD_COMMAND, s->smb_dir, smb_conf); g_free(smb_conf); - if (slirp_add_exec(s->slirp, NULL, smb_cmdline, &vserver_addr, 139) < 0 || - slirp_add_exec(s->slirp, NULL, smb_cmdline, &vserver_addr, 445) < 0) { + if (slirp_add_exec(s->slirp, smb_cmdline, &vserver_addr, 139) < 0 || + slirp_add_exec(s->slirp, smb_cmdline, &vserver_addr, 445) < 0) { slirp_smb_cleanup(s); g_free(smb_cmdline); error_setg(errp, "Conflicting/invalid smbserver address"); @@ -736,6 +736,11 @@ static void guestfwd_read(void *opaque, const uint8_t *buf, int size) slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size); } +static int guestfwd_write(const void *buf, size_t len, void *chr) +{ + return qemu_chr_fe_write_all(chr, buf, len); +} + static int slirp_guestfwd(SlirpState *s, const char *config_str, Error **errp) { struct in_addr server = { .s_addr = 0 }; @@ -769,7 +774,7 @@ static int slirp_guestfwd(SlirpState *s, const char *config_str, Error **errp) snprintf(buf, sizeof(buf), "guestfwd.tcp.%d", port); if ((strlen(p) > 4) && !strncmp(p, "cmd:", 4)) { - if (slirp_add_exec(s->slirp, NULL, &p[4], &server, port) < 0) { + if (slirp_add_exec(s->slirp, &p[4], &server, port) < 0) { error_setg(errp, "Conflicting/invalid host:port in guest " "forwarding rule '%s'", config_str); return -1; @@ -796,7 +801,8 @@ static int slirp_guestfwd(SlirpState *s, const char *config_str, Error **errp) return -1; } - if (slirp_add_exec(s->slirp, &fwd->hd, NULL, &server, port) < 0) { + if (slirp_add_guestfwd(s->slirp, guestfwd_write, &fwd->hd, + &server, port) < 0) { error_setg(errp, "Conflicting/invalid host:port in guest " "forwarding rule '%s'", config_str); g_free(fwd); diff --git a/slirp/libslirp.h b/slirp/libslirp.h index 4611a7447b..ea019828e8 100644 --- a/slirp/libslirp.h +++ b/slirp/libslirp.h @@ -5,6 +5,8 @@ typedef struct Slirp Slirp; +typedef int (*SlirpWriteCb)(const void *buf, size_t len, void *opaque); + /* * Callbacks from slirp * @@ -45,7 +47,9 @@ int slirp_add_hostfwd(Slirp *slirp, int is_udp, struct in_addr guest_addr, int guest_port); int slirp_remove_hostfwd(Slirp *slirp, int is_udp, struct in_addr host_addr, int host_port); -int slirp_add_exec(Slirp *slirp, void *chardev, const char *cmdline, +int slirp_add_exec(Slirp *slirp, const char *cmdline, + struct in_addr *guest_addr, int guest_port); +int slirp_add_guestfwd(Slirp *slirp, SlirpWriteCb write_cb, void *opaque, struct in_addr *guest_addr, int guest_port); char *slirp_connection_info(Slirp *slirp); diff --git a/slirp/misc.c b/slirp/misc.c index eae9596a55..b8a2bf971a 100644 --- a/slirp/misc.c +++ b/slirp/misc.c @@ -32,24 +32,33 @@ remque(void *a) element->qh_rlink = NULL; } -int add_exec(struct gfwd_list **ex_ptr, void *chardev, const char *cmdline, +struct gfwd_list * +add_guestfwd(struct gfwd_list **ex_ptr, + SlirpWriteCb write_cb, void *opaque, struct in_addr addr, int port) { - struct gfwd_list *tmp_ptr; - - tmp_ptr = *ex_ptr; - *ex_ptr = g_new0(struct gfwd_list, 1); - (*ex_ptr)->ex_fport = port; - (*ex_ptr)->ex_addr = addr; - if (chardev) { - (*ex_ptr)->ex_chardev = chardev; - } else { - (*ex_ptr)->ex_exec = g_strdup(cmdline); - } - (*ex_ptr)->ex_next = tmp_ptr; - return 0; + struct gfwd_list *f = g_new0(struct gfwd_list, 1); + + f->write_cb = write_cb; + f->opaque = opaque; + f->ex_fport = port; + f->ex_addr = addr; + f->ex_next = *ex_ptr; + *ex_ptr = f; + + return f; } +struct gfwd_list * +add_exec(struct gfwd_list **ex_ptr, const char *cmdline, + struct in_addr addr, int port) +{ + struct gfwd_list *f = add_guestfwd(ex_ptr, NULL, NULL, addr, port); + + f->ex_exec = g_strdup(cmdline); + + return f; +} static int slirp_socketpair_with_oob(int sv[2]) diff --git a/slirp/misc.h b/slirp/misc.h index 1df707c052..c2ceadb591 100644 --- a/slirp/misc.h +++ b/slirp/misc.h @@ -8,8 +8,11 @@ #ifndef MISC_H #define MISC_H +#include "libslirp.h" + struct gfwd_list { - void *ex_chardev; + SlirpWriteCb write_cb; + void *opaque; struct in_addr ex_addr; /* Server address */ int ex_fport; /* Port to telnet to */ char *ex_exec; /* Command line of what to exec */ @@ -51,7 +54,15 @@ struct slirp_quehead { void slirp_insque(void *, void *); void slirp_remque(void *); -int add_exec(struct gfwd_list **, void *, const char *, struct in_addr, int); int fork_exec(struct socket *so, const char *ex); +struct gfwd_list * +add_guestfwd(struct gfwd_list **ex_ptr, + SlirpWriteCb write_cb, void *opaque, + struct in_addr addr, int port); + +struct gfwd_list * +add_exec(struct gfwd_list **ex_ptr, const char *cmdline, + struct in_addr addr, int port); + #endif diff --git a/slirp/slirp.c b/slirp/slirp.c index 739f364770..a411221914 100644 --- a/slirp/slirp.c +++ b/slirp/slirp.c @@ -25,7 +25,6 @@ #include "qemu-common.h" #include "qemu/timer.h" #include "qemu/error-report.h" -#include "chardev/char-fe.h" #include "migration/register.h" #include "slirp.h" #include "hw/hw.h" @@ -1068,23 +1067,35 @@ check_guestfwd(Slirp *slirp, struct in_addr *guest_addr, int guest_port) return true; } -int slirp_add_exec(Slirp *slirp, void *chardev, const char *cmdline, +int slirp_add_exec(Slirp *slirp, const char *cmdline, struct in_addr *guest_addr, int guest_port) { if (!check_guestfwd(slirp, guest_addr, guest_port)) { return -1; } - return add_exec(&slirp->guestfwd_list, chardev, cmdline, *guest_addr, - htons(guest_port)); + add_exec(&slirp->guestfwd_list, cmdline, *guest_addr, htons(guest_port)); + return 0; +} + +int slirp_add_guestfwd(Slirp *slirp, SlirpWriteCb write_cb, void *opaque, + struct in_addr *guest_addr, int guest_port) +{ + if (!check_guestfwd(slirp, guest_addr, guest_port)) { + return -1; + } + + add_guestfwd(&slirp->guestfwd_list, write_cb, opaque, + *guest_addr, htons(guest_port)); + return 0; } ssize_t slirp_send(struct socket *so, const void *buf, size_t len, int flags) { - if (so->s == -1 && so->chardev) { + if (so->s == -1 && so->guestfwd) { /* XXX this blocks entire thread. Rewrite to use * qemu_chr_fe_write and background I/O callbacks */ - qemu_chr_fe_write_all(so->chardev, buf, len); + so->guestfwd->write_cb(buf, len, so->guestfwd->opaque); return len; } @@ -1449,7 +1460,7 @@ static void slirp_state_save(QEMUFile *f, void *opaque) struct gfwd_list *ex_ptr; for (ex_ptr = slirp->guestfwd_list; ex_ptr; ex_ptr = ex_ptr->ex_next) - if (ex_ptr->ex_chardev) { + if (ex_ptr->write_cb) { struct socket *so; so = slirp_find_ctl_socket(slirp, ex_ptr->ex_addr, ntohs(ex_ptr->ex_fport)); @@ -1484,7 +1495,7 @@ static int slirp_state_load(QEMUFile *f, void *opaque, int version_id) return -EINVAL; } for (ex_ptr = slirp->guestfwd_list; ex_ptr; ex_ptr = ex_ptr->ex_next) { - if (ex_ptr->ex_chardev && + if (ex_ptr->write_cb && so->so_faddr.s_addr == ex_ptr->ex_addr.s_addr && so->so_fport == ex_ptr->ex_fport) { break; diff --git a/slirp/socket.h b/slirp/socket.h index 930ed95972..fc35ca5f72 100644 --- a/slirp/socket.h +++ b/slirp/socket.h @@ -8,6 +8,8 @@ #ifndef SLIRP_SOCKET_H #define SLIRP_SOCKET_H +#include "misc.h" + #define SO_EXPIRE 240000 #define SO_EXPIREFAST 10000 @@ -25,6 +27,7 @@ struct socket { struct socket *so_next,*so_prev; /* For a linked list of sockets */ int s; /* The actual socket */ + struct gfwd_list *guestfwd; int pollfds_idx; /* GPollFD GArray index */ @@ -67,7 +70,6 @@ struct socket { struct sbuf so_rcv; /* Receive buffer */ struct sbuf so_snd; /* Send buffer */ - void * chardev; }; diff --git a/slirp/tcp_subr.c b/slirp/tcp_subr.c index 23a841f26e..4e81736d6f 100644 --- a/slirp/tcp_subr.c +++ b/slirp/tcp_subr.c @@ -964,9 +964,9 @@ int tcp_ctl(struct socket *so) for (ex_ptr = slirp->guestfwd_list; ex_ptr; ex_ptr = ex_ptr->ex_next) { if (ex_ptr->ex_fport == so->so_fport && so->so_faddr.s_addr == ex_ptr->ex_addr.s_addr) { - if (ex_ptr->ex_chardev) { + if (ex_ptr->write_cb) { so->s = -1; - so->chardev = ex_ptr->ex_chardev; + so->guestfwd = ex_ptr; return 1; } DEBUG_MISC(" executing %s", ex_ptr->ex_exec);