From a8686a9b2b347d0619141e950221c4d6d0311d0b Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Mon, 20 Jun 2011 11:35:18 +0200 Subject: [PATCH] virtio-blk: Turn drive serial into a qdev property It needs to be a qdev property, because it belongs to the drive's guest part. Precedence: commit a0fef654 and 6ced55a5. Bonus: info qtree now shows the serial number. Signed-off-by: Markus Armbruster Signed-off-by: Kevin Wolf --- hw/s390-virtio-bus.c | 4 +++- hw/s390-virtio-bus.h | 1 + hw/virtio-blk.c | 29 +++++++++++++++++++---------- hw/virtio-blk.h | 2 ++ hw/virtio-pci.c | 4 +++- hw/virtio-pci.h | 1 + hw/virtio.h | 3 ++- 7 files changed, 31 insertions(+), 13 deletions(-) diff --git a/hw/s390-virtio-bus.c b/hw/s390-virtio-bus.c index d4a12f7531..2bf4821a11 100644 --- a/hw/s390-virtio-bus.c +++ b/hw/s390-virtio-bus.c @@ -128,7 +128,8 @@ static int s390_virtio_blk_init(VirtIOS390Device *dev) { VirtIODevice *vdev; - vdev = virtio_blk_init((DeviceState *)dev, &dev->block); + vdev = virtio_blk_init((DeviceState *)dev, &dev->block, + &dev->block_serial); if (!vdev) { return -1; } @@ -355,6 +356,7 @@ static VirtIOS390DeviceInfo s390_virtio_blk = { .qdev.size = sizeof(VirtIOS390Device), .qdev.props = (Property[]) { DEFINE_BLOCK_PROPERTIES(VirtIOS390Device, block), + DEFINE_PROP_STRING("serial", VirtIOS390Device, block_serial), DEFINE_PROP_END_OF_LIST(), }, }; diff --git a/hw/s390-virtio-bus.h b/hw/s390-virtio-bus.h index 0c412d08e1..f1bece738b 100644 --- a/hw/s390-virtio-bus.h +++ b/hw/s390-virtio-bus.h @@ -42,6 +42,7 @@ typedef struct VirtIOS390Device { uint8_t feat_len; VirtIODevice *vdev; BlockConf block; + char *block_serial; NICConf nic; uint32_t host_features; virtio_serial_conf serial; diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c index 91e0394af9..6471ac85ab 100644 --- a/hw/virtio-blk.c +++ b/hw/virtio-blk.c @@ -28,8 +28,8 @@ typedef struct VirtIOBlock void *rq; QEMUBH *bh; BlockConf *conf; + char *serial; unsigned short sector_mask; - char sn[BLOCK_SERIAL_STRLEN]; DeviceState *qdev; } VirtIOBlock; @@ -362,8 +362,13 @@ static void virtio_blk_handle_request(VirtIOBlockReq *req, } else if (type & VIRTIO_BLK_T_GET_ID) { VirtIOBlock *s = req->dev; - memcpy(req->elem.in_sg[0].iov_base, s->sn, - MIN(req->elem.in_sg[0].iov_len, sizeof(s->sn))); + /* + * NB: per existing s/n string convention the string is + * terminated by '\0' only when shorter than buffer. + */ + strncpy(req->elem.in_sg[0].iov_base, + s->serial ? s->serial : "", + MIN(req->elem.in_sg[0].iov_len, VIRTIO_BLK_ID_BYTES)); virtio_blk_req_complete(req, VIRTIO_BLK_S_OK); } else if (type & VIRTIO_BLK_T_OUT) { qemu_iovec_init_external(&req->qiov, &req->elem.out_sg[1], @@ -531,7 +536,8 @@ static void virtio_blk_change_cb(void *opaque, int reason) } } -VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf *conf) +VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf *conf, + char **serial) { VirtIOBlock *s; int cylinders, heads, secs; @@ -547,6 +553,14 @@ VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf *conf) return NULL; } + if (!*serial) { + /* try to fall back to value set with legacy -drive serial=... */ + dinfo = drive_get_by_blockdev(conf->bs); + if (*dinfo->serial) { + *serial = strdup(dinfo->serial); + } + } + s = (VirtIOBlock *)virtio_common_init("virtio-blk", VIRTIO_ID_BLOCK, sizeof(struct virtio_blk_config), sizeof(VirtIOBlock)); @@ -556,16 +570,11 @@ VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf *conf) s->vdev.reset = virtio_blk_reset; s->bs = conf->bs; s->conf = conf; + s->serial = *serial; s->rq = NULL; s->sector_mask = (s->conf->logical_block_size / BDRV_SECTOR_SIZE) - 1; bdrv_guess_geometry(s->bs, &cylinders, &heads, &secs); - /* NB: per existing s/n string convention the string is terminated - * by '\0' only when less than sizeof (s->sn) - */ - dinfo = drive_get_by_blockdev(s->bs); - strncpy(s->sn, dinfo->serial, sizeof (s->sn)); - s->vq = virtio_add_queue(&s->vdev, 128, virtio_blk_handle_output); qemu_add_vm_change_state_handler(virtio_blk_dma_restart_cb, s); diff --git a/hw/virtio-blk.h b/hw/virtio-blk.h index fff46da7db..5645d2bf3c 100644 --- a/hw/virtio-blk.h +++ b/hw/virtio-blk.h @@ -34,6 +34,8 @@ #define VIRTIO_BLK_F_WCACHE 9 /* write cache enabled */ #define VIRTIO_BLK_F_TOPOLOGY 10 /* Topology information is available */ +#define VIRTIO_BLK_ID_BYTES 20 /* ID string length */ + struct virtio_blk_config { uint64_t capacity; diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c index b3e7ba5d12..d685243728 100644 --- a/hw/virtio-pci.c +++ b/hw/virtio-pci.c @@ -700,7 +700,8 @@ static int virtio_blk_init_pci(PCIDevice *pci_dev) proxy->class_code != PCI_CLASS_STORAGE_OTHER) proxy->class_code = PCI_CLASS_STORAGE_SCSI; - vdev = virtio_blk_init(&pci_dev->qdev, &proxy->block); + vdev = virtio_blk_init(&pci_dev->qdev, &proxy->block, + &proxy->block_serial); if (!vdev) { return -1; } @@ -805,6 +806,7 @@ static PCIDeviceInfo virtio_info[] = { .qdev.props = (Property[]) { DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), DEFINE_BLOCK_PROPERTIES(VirtIOPCIProxy, block), + DEFINE_PROP_STRING("serial", VirtIOPCIProxy, block_serial), DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), diff --git a/hw/virtio-pci.h b/hw/virtio-pci.h index b5189172de..1f0de5684d 100644 --- a/hw/virtio-pci.h +++ b/hw/virtio-pci.h @@ -26,6 +26,7 @@ typedef struct { uint32_t class_code; uint32_t nvectors; BlockConf block; + char *block_serial; NICConf nic; uint32_t host_features; #ifdef CONFIG_LINUX diff --git a/hw/virtio.h b/hw/virtio.h index 69e6bb1a4e..0fd0bb0ac5 100644 --- a/hw/virtio.h +++ b/hw/virtio.h @@ -197,7 +197,8 @@ void virtio_bind_device(VirtIODevice *vdev, const VirtIOBindings *binding, void *opaque); /* Base devices. */ -VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf *conf); +VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf *conf, + char **serial); struct virtio_net_conf; VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf, struct virtio_net_conf *net);