From 25b1d45a1975fd8624c37b5bf42e8502ccf53460 Mon Sep 17 00:00:00 2001 From: Changpeng Liu Date: Tue, 29 May 2018 09:24:35 +0800 Subject: [PATCH] vhost-blk: turn on pre-defined RO feature bit Read only feature shouldn't be negotiable, because if the backend device reported Read only feature supported, QEMU host driver shouldn't change backend's RO attribute. While here, also enable the vhost-user-blk test utility to test RO feature. Signed-off-by: Changpeng Liu Reviewed-by: Stefan Hajnoczi Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- contrib/vhost-user-blk/vhost-user-blk.c | 48 ++++++++++++++++++++++++--------- hw/block/vhost-user-blk.c | 5 +--- include/hw/virtio/vhost-user-blk.h | 1 - 3 files changed, 36 insertions(+), 18 deletions(-) diff --git a/contrib/vhost-user-blk/vhost-user-blk.c b/contrib/vhost-user-blk/vhost-user-blk.c index a6a132a492..571f114a56 100644 --- a/contrib/vhost-user-blk/vhost-user-blk.c +++ b/contrib/vhost-user-blk/vhost-user-blk.c @@ -31,6 +31,7 @@ typedef struct VubDev { VugDev parent; int blk_fd; struct virtio_blk_config blkcfg; + bool enable_ro; char *blk_name; GMainLoop *loop; } VubDev; @@ -301,14 +302,27 @@ static void vub_queue_set_started(VuDev *vu_dev, int idx, bool started) static uint64_t vub_get_features(VuDev *dev) { - return 1ull << VIRTIO_BLK_F_SIZE_MAX | - 1ull << VIRTIO_BLK_F_SEG_MAX | - 1ull << VIRTIO_BLK_F_TOPOLOGY | - 1ull << VIRTIO_BLK_F_BLK_SIZE | - 1ull << VIRTIO_BLK_F_FLUSH | - 1ull << VIRTIO_BLK_F_CONFIG_WCE | - 1ull << VIRTIO_F_VERSION_1 | - 1ull << VHOST_USER_F_PROTOCOL_FEATURES; + uint64_t features; + VugDev *gdev; + VubDev *vdev_blk; + + gdev = container_of(dev, VugDev, parent); + vdev_blk = container_of(gdev, VubDev, parent); + + features = 1ull << VIRTIO_BLK_F_SIZE_MAX | + 1ull << VIRTIO_BLK_F_SEG_MAX | + 1ull << VIRTIO_BLK_F_TOPOLOGY | + 1ull << VIRTIO_BLK_F_BLK_SIZE | + 1ull << VIRTIO_BLK_F_FLUSH | + 1ull << VIRTIO_BLK_F_CONFIG_WCE | + 1ull << VIRTIO_F_VERSION_1 | + 1ull << VHOST_USER_F_PROTOCOL_FEATURES; + + if (vdev_blk->enable_ro) { + features |= 1ull << VIRTIO_BLK_F_RO; + } + + return features; } static uint64_t @@ -476,6 +490,7 @@ vub_new(char *blk_file) vub_free(vdev_blk); return NULL; } + vdev_blk->enable_ro = false; vdev_blk->blkcfg.wce = 0; vdev_blk->blk_name = blk_file; @@ -490,10 +505,11 @@ int main(int argc, char **argv) int opt; char *unix_socket = NULL; char *blk_file = NULL; + bool enable_ro = false; int lsock = -1, csock = -1; VubDev *vdev_blk = NULL; - while ((opt = getopt(argc, argv, "b:s:h")) != -1) { + while ((opt = getopt(argc, argv, "b:rs:h")) != -1) { switch (opt) { case 'b': blk_file = g_strdup(optarg); @@ -501,17 +517,20 @@ int main(int argc, char **argv) case 's': unix_socket = g_strdup(optarg); break; + case 'r': + enable_ro = true; + break; case 'h': default: - printf("Usage: %s [-b block device or file, -s UNIX domain socket]" - " | [ -h ]\n", argv[0]); + printf("Usage: %s [ -b block device or file, -s UNIX domain socket" + " | -r Enable read-only ] | [ -h ]\n", argv[0]); return 0; } } if (!unix_socket || !blk_file) { - printf("Usage: %s [-b block device or file, -s UNIX domain socket] |" - " [ -h ]\n", argv[0]); + printf("Usage: %s [ -b block device or file, -s UNIX domain socket" + " | -r Enable read-only ] | [ -h ]\n", argv[0]); return -1; } @@ -530,6 +549,9 @@ int main(int argc, char **argv) if (!vdev_blk) { goto err; } + if (enable_ro) { + vdev_blk->enable_ro = true; + } vug_init(&vdev_blk->parent, csock, vub_panic_cb, &vub_iface); diff --git a/hw/block/vhost-user-blk.c b/hw/block/vhost-user-blk.c index 7c3fa8bb1c..d755223643 100644 --- a/hw/block/vhost-user-blk.c +++ b/hw/block/vhost-user-blk.c @@ -203,13 +203,11 @@ static uint64_t vhost_user_blk_get_features(VirtIODevice *vdev, virtio_add_feature(&features, VIRTIO_BLK_F_TOPOLOGY); virtio_add_feature(&features, VIRTIO_BLK_F_BLK_SIZE); virtio_add_feature(&features, VIRTIO_BLK_F_FLUSH); + virtio_add_feature(&features, VIRTIO_BLK_F_RO); if (s->config_wce) { virtio_add_feature(&features, VIRTIO_BLK_F_CONFIG_WCE); } - if (s->config_ro) { - virtio_add_feature(&features, VIRTIO_BLK_F_RO); - } if (s->num_queues > 1) { virtio_add_feature(&features, VIRTIO_BLK_F_MQ); } @@ -339,7 +337,6 @@ static Property vhost_user_blk_properties[] = { DEFINE_PROP_UINT16("num-queues", VHostUserBlk, num_queues, 1), DEFINE_PROP_UINT32("queue-size", VHostUserBlk, queue_size, 128), DEFINE_PROP_BIT("config-wce", VHostUserBlk, config_wce, 0, true), - DEFINE_PROP_BIT("config-ro", VHostUserBlk, config_ro, 0, false), DEFINE_PROP_END_OF_LIST(), }; diff --git a/include/hw/virtio/vhost-user-blk.h b/include/hw/virtio/vhost-user-blk.h index f1258ae545..d52944aeeb 100644 --- a/include/hw/virtio/vhost-user-blk.h +++ b/include/hw/virtio/vhost-user-blk.h @@ -35,7 +35,6 @@ typedef struct VHostUserBlk { uint16_t num_queues; uint32_t queue_size; uint32_t config_wce; - uint32_t config_ro; struct vhost_dev dev; VhostUserState *vhost_user; } VHostUserBlk; -- 2.11.0