From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46771) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZNKU3-0002De-CQ for qemu-devel@nongnu.org; Thu, 06 Aug 2015 08:41:20 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZNKU2-0008PK-9r for qemu-devel@nongnu.org; Thu, 06 Aug 2015 08:41:19 -0400 Received: from mail-qk0-x229.google.com ([2607:f8b0:400d:c09::229]:34751) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZNKU2-0008PG-5G for qemu-devel@nongnu.org; Thu, 06 Aug 2015 08:41:18 -0400 Received: by qkcs67 with SMTP id s67so3204339qkc.1 for ; Thu, 06 Aug 2015 05:41:17 -0700 (PDT) Sender: =?UTF-8?B?TWFyYy1BbmRyw6kgTHVyZWF1?= From: marcandre.lureau@redhat.com Date: Thu, 6 Aug 2015 14:40:44 +0200 Message-Id: <1438864852-4939-9-git-send-email-marcandre.lureau@redhat.com> In-Reply-To: <1438864852-4939-1-git-send-email-marcandre.lureau@redhat.com> References: <1438864852-4939-1-git-send-email-marcandre.lureau@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [Qemu-devel] [PATCH v3 08/16] vhost-user: send log shm fd along with log_base List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: haifeng.lin@huawei.com, mst@redhat.com, thibaut.collet@6wind.com, jasowang@redhat.com, pbonzini@redhat.com, =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= From: Marc-André Lureau Send the shm for the dirty pages logging if the backend support VHOST_USER_PROTOCOL_F_LOG_SHMFD. Signed-off-by: Marc-André Lureau --- hw/virtio/vhost-user.c | 16 ++++++++++++++-- hw/virtio/vhost.c | 5 +++-- 2 files changed, 17 insertions(+), 4 deletions(-) diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c index 21ecbcd..b2f46a9 100644 --- a/hw/virtio/vhost-user.c +++ b/hw/virtio/vhost-user.c @@ -26,7 +26,9 @@ #define VHOST_MEMORY_MAX_NREGIONS 8 #define VHOST_USER_F_PROTOCOL_FEATURES 30 -#define VHOST_USER_PROTOCOL_FEATURE_MASK 0x0ULL + +#define VHOST_USER_PROTOCOL_FEATURE_MASK 0x1ULL +#define VHOST_USER_PROTOCOL_F_LOG_SHMFD 0 typedef enum VhostUserRequest { VHOST_USER_NONE = 0, @@ -215,8 +217,18 @@ static int vhost_user_call(struct vhost_dev *dev, need_reply = 1; break; + case VHOST_USER_SET_LOG_BASE: { + struct vhost_log *log = va_arg(ap, struct vhost_log *); + + if (__virtio_has_feature(dev->protocol_features, + VHOST_USER_PROTOCOL_F_LOG_SHMFD) && + log->fd != -1) { + fds[fd_num++] = log->fd; + } + } + /* fall through */ + case VHOST_USER_SET_FEATURES: - case VHOST_USER_SET_LOG_BASE: msg.u64 = *((__u64 *) arg); msg.size = sizeof(m.u64); break; diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 057d548..ed8b1a5 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -359,7 +359,7 @@ static inline void vhost_dev_log_resize(struct vhost_dev* dev, uint64_t size) /* inform backend of log switching, this must be done before releasing the current log, to ensure no logging is lost */ - r = dev->vhost_ops->vhost_call(dev, VHOST_SET_LOG_BASE, &log_base); + r = dev->vhost_ops->vhost_call(dev, VHOST_SET_LOG_BASE, &log_base, log); assert(r >= 0); vhost_log_put(dev, true); dev->log = log; @@ -1167,7 +1167,8 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev) hdev->log = vhost_log_get(hdev->log_size, share); log_base = (uintptr_t)hdev->log->log; r = hdev->vhost_ops->vhost_call(hdev, VHOST_SET_LOG_BASE, - hdev->log_size ? &log_base : NULL); + hdev->log_size ? &log_base : NULL, + hdev->log); if (r < 0) { r = -errno; goto fail_log; -- 2.4.3