760df0d121
* Cleanups (Philippe) * virtio-scsi fix (Pan Nengyuan) * Tweak Skylake-v3 model id (Kashyap) * x86 UCODE_REV support and nested live migration fix (myself) * Advisory mode for pvpanic (Zhenwei) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQEcBAABAgAGBQJeK1CXAAoJEL/70l94x66DXtkIAI6W5wEY0Yme4M9Q5mGc0RV8 uscPLg0wsg88u6xne8ucCiGymvDREym2ii/aVI0Hi5ish84ZMdCrdck9cd+llpMf +a3slL26AKlOW8WtYSuyAE1RdLFXngeXdwal5KtWPEExJorkDUPTbwhBzQduQK1a myoHHcbwdd/96v7FvKnfG8jM6KZtHPQQ0i6+6fX4PN44jaULQNjze8GIrRBEwqw5 uCKJFQPBXiVcxKjH5/kzI1vl2hLJbF2ZGVEzX/U8OPZwyGPHIkWquURo8lvUTPfb ySlNTUTV2CyrN65TBRXQp/mJi44WvME5Jxlf5rNLBaYXPpL0zhmILKn5X5ya4U0= =TD0Y -----END PGP SIGNATURE----- Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging * Register qdev properties as class properties (Marc-André) * Cleanups (Philippe) * virtio-scsi fix (Pan Nengyuan) * Tweak Skylake-v3 model id (Kashyap) * x86 UCODE_REV support and nested live migration fix (myself) * Advisory mode for pvpanic (Zhenwei) # gpg: Signature made Fri 24 Jan 2020 20:16:23 GMT # gpg: using RSA key BFFBD25F78C7AE83 # gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full] # gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" [full] # Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1 # Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83 * remotes/bonzini/tags/for-upstream: (58 commits) build-sys: clean up flags included in the linker command line target/i386: Add the 'model-id' for Skylake -v3 CPU models qdev: use object_property_help() qapi/qmp: add ObjectPropertyInfo.default-value qom: introduce object_property_help() qom: simplify qmp_device_list_properties() vl: print default value in object help qdev: register properties as class properties qdev: move instance properties to class properties qdev: rename DeviceClass.props qdev: set properties with device_class_set_props() object: return self in object_ref() object: release all props object: add object_class_property_add_link() object: express const link with link property object: add direct link flag object: rename link "child" to "target" object: check strong flag with & object: do not free class properties object: add object_property_set_default ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
272 lines
7.6 KiB
C
272 lines
7.6 KiB
C
/*
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* Virtio 9p backend
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*
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* Copyright IBM, Corp. 2010
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#include "qemu/osdep.h"
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#include "hw/virtio/virtio.h"
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#include "qemu/sockets.h"
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#include "virtio-9p.h"
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#include "fsdev/qemu-fsdev.h"
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#include "coth.h"
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#include "hw/qdev-properties.h"
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#include "hw/virtio/virtio-access.h"
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#include "qemu/iov.h"
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#include "qemu/module.h"
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static void virtio_9p_push_and_notify(V9fsPDU *pdu)
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{
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V9fsState *s = pdu->s;
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V9fsVirtioState *v = container_of(s, V9fsVirtioState, state);
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VirtQueueElement *elem = v->elems[pdu->idx];
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/* push onto queue and notify */
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virtqueue_push(v->vq, elem, pdu->size);
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g_free(elem);
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v->elems[pdu->idx] = NULL;
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/* FIXME: we should batch these completions */
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virtio_notify(VIRTIO_DEVICE(v), v->vq);
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}
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static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq)
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{
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V9fsVirtioState *v = (V9fsVirtioState *)vdev;
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V9fsState *s = &v->state;
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V9fsPDU *pdu;
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ssize_t len;
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VirtQueueElement *elem;
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while ((pdu = pdu_alloc(s))) {
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P9MsgHeader out;
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elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
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if (!elem) {
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goto out_free_pdu;
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}
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if (iov_size(elem->in_sg, elem->in_num) < 7) {
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virtio_error(vdev,
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"The guest sent a VirtFS request without space for "
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"the reply");
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goto out_free_req;
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}
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len = iov_to_buf(elem->out_sg, elem->out_num, 0, &out, 7);
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if (len != 7) {
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virtio_error(vdev, "The guest sent a malformed VirtFS request: "
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"header size is %zd, should be 7", len);
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goto out_free_req;
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}
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v->elems[pdu->idx] = elem;
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pdu_submit(pdu, &out);
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}
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return;
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out_free_req:
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virtqueue_detach_element(vq, elem, 0);
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g_free(elem);
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out_free_pdu:
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pdu_free(pdu);
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}
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static uint64_t virtio_9p_get_features(VirtIODevice *vdev, uint64_t features,
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Error **errp)
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{
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virtio_add_feature(&features, VIRTIO_9P_MOUNT_TAG);
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return features;
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}
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static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config)
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{
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int len;
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struct virtio_9p_config *cfg;
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V9fsVirtioState *v = VIRTIO_9P(vdev);
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V9fsState *s = &v->state;
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len = strlen(s->tag);
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cfg = g_malloc0(sizeof(struct virtio_9p_config) + len);
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virtio_stw_p(vdev, &cfg->tag_len, len);
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/* We don't copy the terminating null to config space */
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memcpy(cfg->tag, s->tag, len);
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memcpy(config, cfg, v->config_size);
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g_free(cfg);
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}
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static void virtio_9p_reset(VirtIODevice *vdev)
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{
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V9fsVirtioState *v = (V9fsVirtioState *)vdev;
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v9fs_reset(&v->state);
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}
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static ssize_t virtio_pdu_vmarshal(V9fsPDU *pdu, size_t offset,
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const char *fmt, va_list ap)
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{
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V9fsState *s = pdu->s;
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V9fsVirtioState *v = container_of(s, V9fsVirtioState, state);
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VirtQueueElement *elem = v->elems[pdu->idx];
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ssize_t ret;
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ret = v9fs_iov_vmarshal(elem->in_sg, elem->in_num, offset, 1, fmt, ap);
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if (ret < 0) {
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VirtIODevice *vdev = VIRTIO_DEVICE(v);
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virtio_error(vdev, "Failed to encode VirtFS reply type %d",
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pdu->id + 1);
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}
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return ret;
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}
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static ssize_t virtio_pdu_vunmarshal(V9fsPDU *pdu, size_t offset,
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const char *fmt, va_list ap)
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{
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V9fsState *s = pdu->s;
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V9fsVirtioState *v = container_of(s, V9fsVirtioState, state);
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VirtQueueElement *elem = v->elems[pdu->idx];
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ssize_t ret;
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ret = v9fs_iov_vunmarshal(elem->out_sg, elem->out_num, offset, 1, fmt, ap);
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if (ret < 0) {
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VirtIODevice *vdev = VIRTIO_DEVICE(v);
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virtio_error(vdev, "Failed to decode VirtFS request type %d", pdu->id);
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}
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return ret;
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}
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static void virtio_init_in_iov_from_pdu(V9fsPDU *pdu, struct iovec **piov,
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unsigned int *pniov, size_t *size)
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{
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V9fsState *s = pdu->s;
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V9fsVirtioState *v = container_of(s, V9fsVirtioState, state);
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VirtQueueElement *elem = v->elems[pdu->idx];
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size_t buf_size = iov_size(elem->in_sg, elem->in_num);
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if (buf_size < P9_IOHDRSZ) {
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VirtIODevice *vdev = VIRTIO_DEVICE(v);
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virtio_error(vdev,
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"VirtFS reply type %d needs %zu bytes, buffer has %zu, less than minimum",
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pdu->id + 1, *size, buf_size);
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}
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if (buf_size < *size) {
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*size = buf_size;
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}
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*piov = elem->in_sg;
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*pniov = elem->in_num;
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}
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static void virtio_init_out_iov_from_pdu(V9fsPDU *pdu, struct iovec **piov,
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unsigned int *pniov, size_t size)
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{
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V9fsState *s = pdu->s;
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V9fsVirtioState *v = container_of(s, V9fsVirtioState, state);
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VirtQueueElement *elem = v->elems[pdu->idx];
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size_t buf_size = iov_size(elem->out_sg, elem->out_num);
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if (buf_size < size) {
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VirtIODevice *vdev = VIRTIO_DEVICE(v);
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virtio_error(vdev,
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"VirtFS request type %d needs %zu bytes, buffer has %zu",
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pdu->id, size, buf_size);
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}
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*piov = elem->out_sg;
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*pniov = elem->out_num;
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}
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static const V9fsTransport virtio_9p_transport = {
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.pdu_vmarshal = virtio_pdu_vmarshal,
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.pdu_vunmarshal = virtio_pdu_vunmarshal,
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.init_in_iov_from_pdu = virtio_init_in_iov_from_pdu,
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.init_out_iov_from_pdu = virtio_init_out_iov_from_pdu,
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.push_and_notify = virtio_9p_push_and_notify,
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};
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static void virtio_9p_device_realize(DeviceState *dev, Error **errp)
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{
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VirtIODevice *vdev = VIRTIO_DEVICE(dev);
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V9fsVirtioState *v = VIRTIO_9P(dev);
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V9fsState *s = &v->state;
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if (v9fs_device_realize_common(s, &virtio_9p_transport, errp)) {
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return;
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}
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v->config_size = sizeof(struct virtio_9p_config) + strlen(s->fsconf.tag);
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virtio_init(vdev, "virtio-9p", VIRTIO_ID_9P, v->config_size);
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v->vq = virtio_add_queue(vdev, MAX_REQ, handle_9p_output);
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}
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static void virtio_9p_device_unrealize(DeviceState *dev, Error **errp)
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{
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VirtIODevice *vdev = VIRTIO_DEVICE(dev);
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V9fsVirtioState *v = VIRTIO_9P(dev);
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V9fsState *s = &v->state;
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virtio_delete_queue(v->vq);
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virtio_cleanup(vdev);
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v9fs_device_unrealize_common(s, errp);
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}
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/* virtio-9p device */
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static const VMStateDescription vmstate_virtio_9p = {
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.name = "virtio-9p",
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.minimum_version_id = 1,
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.version_id = 1,
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.fields = (VMStateField[]) {
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VMSTATE_VIRTIO_DEVICE,
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VMSTATE_END_OF_LIST()
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},
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};
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static Property virtio_9p_properties[] = {
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DEFINE_PROP_STRING("mount_tag", V9fsVirtioState, state.fsconf.tag),
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DEFINE_PROP_STRING("fsdev", V9fsVirtioState, state.fsconf.fsdev_id),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void virtio_9p_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
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device_class_set_props(dc, virtio_9p_properties);
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dc->vmsd = &vmstate_virtio_9p;
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set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
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vdc->realize = virtio_9p_device_realize;
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vdc->unrealize = virtio_9p_device_unrealize;
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vdc->get_features = virtio_9p_get_features;
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vdc->get_config = virtio_9p_get_config;
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vdc->reset = virtio_9p_reset;
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}
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static const TypeInfo virtio_device_info = {
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.name = TYPE_VIRTIO_9P,
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.parent = TYPE_VIRTIO_DEVICE,
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.instance_size = sizeof(V9fsVirtioState),
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.class_init = virtio_9p_class_init,
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};
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static void virtio_9p_register_types(void)
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{
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type_register_static(&virtio_device_info);
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}
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type_init(virtio_9p_register_types)
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