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Tsirkin" , Jason Wang , Akihiko Odaki Subject: [PATCH v4 01/20] tap: Remove tap_probe_vnet_hdr_len() Date: Sun, 15 Oct 2023 23:02:33 +0900 Message-ID: <20231015140259.259434-2-akihiko.odaki@daynix.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231015140259.259434-1-akihiko.odaki@daynix.com> References: <20231015140259.259434-1-akihiko.odaki@daynix.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: none client-ip=2607:f8b0:4864:20::c29; envelope-from=akihiko.odaki@daynix.com; helo=mail-oo1-xc29.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @daynix-com.20230601.gappssmtp.com) X-ZM-MESSAGEID: 1697378634304100001 Content-Type: text/plain; charset="utf-8" It was necessary since an Linux older than 2.6.35 may implement the virtio-net header but may not allow to change its length. Remove it since such an old Linux is no longer supported. Signed-off-by: Akihiko Odaki Acked-by: Michael S. Tsirkin --- net/tap_int.h | 1 - net/tap-bsd.c | 5 ----- net/tap-linux.c | 20 -------------------- net/tap-solaris.c | 5 ----- net/tap-stub.c | 5 ----- net/tap.c | 10 ++-------- 6 files changed, 2 insertions(+), 44 deletions(-) diff --git a/net/tap_int.h b/net/tap_int.h index 547f8a5a28..ff7ab23ad7 100644 --- a/net/tap_int.h +++ b/net/tap_int.h @@ -35,7 +35,6 @@ ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxl= en); =20 void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp); int tap_probe_vnet_hdr(int fd, Error **errp); -int tap_probe_vnet_hdr_len(int fd, int len); int tap_probe_has_ufo(int fd); void tap_fd_set_offload(int fd, int csum, int tso4, int tso6, int ecn, int= ufo); void tap_fd_set_vnet_hdr_len(int fd, int len); diff --git a/net/tap-bsd.c b/net/tap-bsd.c index 4c98fdd337..bcd9e894a8 100644 --- a/net/tap-bsd.c +++ b/net/tap-bsd.c @@ -212,11 +212,6 @@ int tap_probe_has_ufo(int fd) return 0; } =20 -int tap_probe_vnet_hdr_len(int fd, int len) -{ - return 0; -} - void tap_fd_set_vnet_hdr_len(int fd, int len) { } diff --git a/net/tap-linux.c b/net/tap-linux.c index f54f308d35..985287816e 100644 --- a/net/tap-linux.c +++ b/net/tap-linux.c @@ -173,26 +173,6 @@ int tap_probe_has_ufo(int fd) return 1; } =20 -/* Verify that we can assign given length */ -int tap_probe_vnet_hdr_len(int fd, int len) -{ - int orig; - if (ioctl(fd, TUNGETVNETHDRSZ, &orig) =3D=3D -1) { - return 0; - } - if (ioctl(fd, TUNSETVNETHDRSZ, &len) =3D=3D -1) { - return 0; - } - /* Restore original length: we can't handle failure. */ - if (ioctl(fd, TUNSETVNETHDRSZ, &orig) =3D=3D -1) { - fprintf(stderr, "TUNGETVNETHDRSZ ioctl() failed: %s. Exiting.\n", - strerror(errno)); - abort(); - return -errno; - } - return 1; -} - void tap_fd_set_vnet_hdr_len(int fd, int len) { if (ioctl(fd, TUNSETVNETHDRSZ, &len) =3D=3D -1) { diff --git a/net/tap-solaris.c b/net/tap-solaris.c index 38e15028bf..6ad79fecad 100644 --- a/net/tap-solaris.c +++ b/net/tap-solaris.c @@ -216,11 +216,6 @@ int tap_probe_has_ufo(int fd) return 0; } =20 -int tap_probe_vnet_hdr_len(int fd, int len) -{ - return 0; -} - void tap_fd_set_vnet_hdr_len(int fd, int len) { } diff --git a/net/tap-stub.c b/net/tap-stub.c index a0fa25804b..422257668c 100644 --- a/net/tap-stub.c +++ b/net/tap-stub.c @@ -47,11 +47,6 @@ int tap_probe_has_ufo(int fd) return 0; } =20 -int tap_probe_vnet_hdr_len(int fd, int len) -{ - return 0; -} - void tap_fd_set_vnet_hdr_len(int fd, int len) { } diff --git a/net/tap.c b/net/tap.c index c6639d9f20..0403729739 100644 --- a/net/tap.c +++ b/net/tap.c @@ -248,11 +248,7 @@ static bool tap_has_vnet_hdr(NetClientState *nc) =20 static bool tap_has_vnet_hdr_len(NetClientState *nc, int len) { - TAPState *s =3D DO_UPCAST(TAPState, nc, nc); - - assert(nc->info->type =3D=3D NET_CLIENT_DRIVER_TAP); - - return !!tap_probe_vnet_hdr_len(s->fd, len); + return tap_has_vnet_hdr(nc); } =20 static int tap_get_vnet_hdr_len(NetClientState *nc) @@ -419,9 +415,7 @@ static TAPState *net_tap_fd_init(NetClientState *peer, * Make sure host header length is set correctly in tap: * it might have been modified by another instance of qemu. */ - if (tap_probe_vnet_hdr_len(s->fd, s->host_vnet_hdr_len)) { - tap_fd_set_vnet_hdr_len(s->fd, s->host_vnet_hdr_len); - } + tap_fd_set_vnet_hdr_len(s->fd, s->host_vnet_hdr_len); tap_read_poll(s, true); s->vhost_net =3D NULL; =20 --=20 2.42.0