From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53795) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ys8u7-0007Qq-8o for qemu-devel@nongnu.org; Tue, 12 May 2015 08:03:23 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Ys8u1-0003zn-Py for qemu-devel@nongnu.org; Tue, 12 May 2015 08:03:19 -0400 Received: from mx1.redhat.com ([209.132.183.28]:47445) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ys8u1-0003zF-JC for qemu-devel@nongnu.org; Tue, 12 May 2015 08:03:13 -0400 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id t4CC3CE6009092 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Tue, 12 May 2015 08:03:13 -0400 From: Markus Armbruster Date: Tue, 12 May 2015 14:03:01 +0200 Message-Id: <1431432187-10993-10-git-send-email-armbru@redhat.com> In-Reply-To: <1431432187-10993-1-git-send-email-armbru@redhat.com> References: <1431432187-10993-1-git-send-email-armbru@redhat.com> Subject: [Qemu-devel] [PATCH 09/15] tap: Convert launch_script() to Error List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: stefanha@redhat.com Fixes inappropriate use of stderr in monitor command handler. While there, improve the messages some. Signed-off-by: Markus Armbruster --- net/tap.c | 40 ++++++++++++++++++++++++++++------------ 1 file changed, 28 insertions(+), 12 deletions(-) diff --git a/net/tap.c b/net/tap.c index d1f5644..08bfc51 100644 --- a/net/tap.c +++ b/net/tap.c @@ -59,7 +59,8 @@ typedef struct TAPState { unsigned host_vnet_hdr_len; } TAPState; -static int launch_script(const char *setup_script, const char *ifname, int fd); +static void launch_script(const char *setup_script, const char *ifname, + int fd, Error **errp); static int tap_can_send(void *opaque); static void tap_send(void *opaque); @@ -288,6 +289,7 @@ static void tap_set_offload(NetClientState *nc, int csum, int tso4, static void tap_cleanup(NetClientState *nc) { TAPState *s = DO_UPCAST(TAPState, nc, nc); + Error **err = NULL; if (s->vhost_net) { vhost_net_cleanup(s->vhost_net); @@ -296,8 +298,12 @@ static void tap_cleanup(NetClientState *nc) qemu_purge_queued_packets(nc); - if (s->down_script[0]) - launch_script(s->down_script, s->down_script_arg, s->fd); + if (s->down_script[0]) { + launch_script(s->down_script, s->down_script_arg, s->fd, &err); + if (err) { + error_report_err(err); + } + } tap_read_poll(s, false); tap_write_poll(s, false); @@ -368,7 +374,8 @@ static TAPState *net_tap_fd_init(NetClientState *peer, return s; } -static int launch_script(const char *setup_script, const char *ifname, int fd) +static void launch_script(const char *setup_script, const char *ifname, + int fd, Error **errp) { int pid, status; char *args[3]; @@ -376,6 +383,11 @@ static int launch_script(const char *setup_script, const char *ifname, int fd) /* try to launch network script */ pid = fork(); + if (pid < 0) { + error_setg_errno(errp, errno, "could not launch network script %s", + setup_script); + return; + } if (pid == 0) { int open_max = sysconf(_SC_OPEN_MAX), i; @@ -390,17 +402,17 @@ static int launch_script(const char *setup_script, const char *ifname, int fd) *parg = NULL; execv(setup_script, args); _exit(1); - } else if (pid > 0) { + } else { while (waitpid(pid, &status, 0) != pid) { /* loop */ } if (WIFEXITED(status) && WEXITSTATUS(status) == 0) { - return 0; + return; } + error_setg(errp, "network script %s failed with status %d", + setup_script, status); } - fprintf(stderr, "%s: could not launch network script\n", setup_script); - return -1; } static int recv_fd(int c) @@ -571,6 +583,7 @@ static int net_tap_init(const NetdevTapOptions *tap, int *vnet_hdr, const char *setup_script, char *ifname, size_t ifname_sz, int mq_required) { + Error **err = NULL; int fd, vnet_hdr_required; if (tap->has_vnet_hdr) { @@ -589,10 +602,13 @@ static int net_tap_init(const NetdevTapOptions *tap, int *vnet_hdr, if (setup_script && setup_script[0] != '\0' && - strcmp(setup_script, "no") != 0 && - launch_script(setup_script, ifname, fd)) { - close(fd); - return -1; + strcmp(setup_script, "no") != 0) { + launch_script(setup_script, ifname, fd, &err); + if (err) { + error_report_err(err); + close(fd); + return -1; + } } return fd; -- 1.9.3