From 80b832c300c2fc39c68e0ab095d408cb9199cfa0 Mon Sep 17 00:00:00 2001
From: Markus Armbruster <armbru@redhat.com>
Date: Fri, 15 May 2015 13:58:55 +0200
Subject: [PATCH] tap: Convert tap_set_sndbuf() to Error

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 1431691143-1015-8-git-send-email-armbru@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 net/tap-aix.c     | 3 +--
 net/tap-bsd.c     | 3 +--
 net/tap-haiku.c   | 3 +--
 net/tap-linux.c   | 6 ++----
 net/tap-solaris.c | 3 +--
 net/tap.c         | 4 +++-
 net/tap_int.h     | 2 +-
 7 files changed, 10 insertions(+), 14 deletions(-)

diff --git a/net/tap-aix.c b/net/tap-aix.c
index 804d16448d..0a3d46158f 100644
--- a/net/tap-aix.c
+++ b/net/tap-aix.c
@@ -32,9 +32,8 @@ int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
     return -1;
 }
 
-int tap_set_sndbuf(int fd, const NetdevTapOptions *tap)
+void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp)
 {
-    return 0;
 }
 
 int tap_probe_vnet_hdr(int fd)
diff --git a/net/tap-bsd.c b/net/tap-bsd.c
index bf91bd03fd..53cdd9f4e1 100644
--- a/net/tap-bsd.c
+++ b/net/tap-bsd.c
@@ -176,9 +176,8 @@ error:
 }
 #endif /* __FreeBSD__ */
 
-int tap_set_sndbuf(int fd, const NetdevTapOptions *tap)
+void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp)
 {
-    return 0;
 }
 
 int tap_probe_vnet_hdr(int fd)
diff --git a/net/tap-haiku.c b/net/tap-haiku.c
index e5ce436d24..0905b2887d 100644
--- a/net/tap-haiku.c
+++ b/net/tap-haiku.c
@@ -32,9 +32,8 @@ int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
     return -1;
 }
 
-int tap_set_sndbuf(int fd, const NetdevTapOptions *tap)
+void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp)
 {
-    return 0;
 }
 
 int tap_probe_vnet_hdr(int fd)
diff --git a/net/tap-linux.c b/net/tap-linux.c
index 812bf2dfc6..6fa27442bc 100644
--- a/net/tap-linux.c
+++ b/net/tap-linux.c
@@ -126,7 +126,7 @@ int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
  */
 #define TAP_DEFAULT_SNDBUF 0
 
-int tap_set_sndbuf(int fd, const NetdevTapOptions *tap)
+void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp)
 {
     int sndbuf;
 
@@ -139,10 +139,8 @@ int tap_set_sndbuf(int fd, const NetdevTapOptions *tap)
     }
 
     if (ioctl(fd, TUNSETSNDBUF, &sndbuf) == -1 && tap->has_sndbuf) {
-        error_report("TUNSETSNDBUF ioctl failed: %s", strerror(errno));
-        return -1;
+        error_setg_errno(errp, errno, "TUNSETSNDBUF ioctl failed");
     }
-    return 0;
 }
 
 int tap_probe_vnet_hdr(int fd)
diff --git a/net/tap-solaris.c b/net/tap-solaris.c
index 9c7278f1bf..7839323e20 100644
--- a/net/tap-solaris.c
+++ b/net/tap-solaris.c
@@ -198,9 +198,8 @@ int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
     return fd;
 }
 
-int tap_set_sndbuf(int fd, const NetdevTapOptions *tap)
+void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp)
 {
-    return 0;
 }
 
 int tap_probe_vnet_hdr(int fd)
diff --git a/net/tap.c b/net/tap.c
index 23c81faab5..d54222d068 100644
--- a/net/tap.c
+++ b/net/tap.c
@@ -610,7 +610,9 @@ static int net_init_tap_one(const NetdevTapOptions *tap, NetClientState *peer,
     TAPState *s = net_tap_fd_init(peer, model, name, fd, vnet_hdr);
     int vhostfd;
 
-    if (tap_set_sndbuf(s->fd, tap) < 0) {
+    tap_set_sndbuf(s->fd, tap, &err);
+    if (err) {
+        error_report_err(err);
         return -1;
     }
 
diff --git a/net/tap_int.h b/net/tap_int.h
index 79afdf2d58..6df271f823 100644
--- a/net/tap_int.h
+++ b/net/tap_int.h
@@ -34,7 +34,7 @@ int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
 
 ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen);
 
-int tap_set_sndbuf(int fd, const NetdevTapOptions *tap);
+void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp);
 int tap_probe_vnet_hdr(int fd);
 int tap_probe_vnet_hdr_len(int fd, int len);
 int tap_probe_has_ufo(int fd);