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qemu.10255
0349-9pfs-introduce-V9fsVirtioState.patch
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File 0349-9pfs-introduce-V9fsVirtioState.patch of Package qemu.10255
From c490011a9b83a040d0288199c68ad07432e65123 Mon Sep 17 00:00:00 2001 From: Wei Liu <wei.liu2@citrix.com> Date: Mon, 11 Jan 2016 09:29:37 +0000 Subject: [PATCH] 9pfs: introduce V9fsVirtioState V9fsState now only contains generic fields. Introduce V9fsVirtioState for virtio transport. Change virtio-pci and virtio-ccw to use V9fsVirtioState. Signed-off-by: Wei Liu <wei.liu2@citrix.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> (cherry picked from commit 00588a0aa2ade2e32a552633bbbefdc6ae5e32a2) [BR: Fix and/or infrastructure for BSC#1020427 CVE-2016-9602] Signed-off-by: Bruce Rogers <brogers@suse.com> --- hw/9pfs/9p.c | 11 +++-- hw/9pfs/9p.h | 6 +-- hw/9pfs/virtio-9p-device.c | 96 +++++++++++++++++++++++--------------- hw/9pfs/virtio-9p.h | 12 ++++- hw/virtio/virtio-pci.h | 2 +- 5 files changed, 79 insertions(+), 48 deletions(-) diff --git a/hw/9pfs/9p.c b/hw/9pfs/9p.c index 3d9f4935c7..cd442a445e 100644 --- a/hw/9pfs/9p.c +++ b/hw/9pfs/9p.c @@ -1584,6 +1584,8 @@ static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, size_t offset = 7; int read_count; int64_t xattr_len; + V9fsVirtioState *v = container_of(s, V9fsVirtioState, state); + VirtQueueElement *elem = &v->elems[pdu->idx]; xattr_len = fidp->fs.xattr.len; read_count = xattr_len - off; @@ -1600,7 +1602,8 @@ static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, return err; } offset += err; - err = v9fs_pack(pdu->elem.in_sg, pdu->elem.in_num, offset, + + err = v9fs_pack(elem->in_sg, elem->in_num, offset, ((char *)fidp->fs.xattr.value) + off, read_count); if (err < 0) { @@ -3268,6 +3271,7 @@ void pdu_submit(V9fsPDU *pdu) /* Returns 0 on success, 1 on failure. */ int v9fs_device_realize_common(V9fsState *s, Error **errp) { + V9fsVirtioState *v = container_of(s, V9fsVirtioState, state); int i, len; struct stat stat; FsDriverEntry *fse; @@ -3278,8 +3282,9 @@ int v9fs_device_realize_common(V9fsState *s, Error **errp) QLIST_INIT(&s->free_list); QLIST_INIT(&s->active_list); for (i = 0; i < (MAX_REQ - 1); i++) { - QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); - s->pdus[i].s = s; + QLIST_INSERT_HEAD(&s->free_list, &v->pdus[i], next); + v->pdus[i].s = s; + v->pdus[i].idx = i; } v9fs_path_init(&path); diff --git a/hw/9pfs/9p.h b/hw/9pfs/9p.h index 3fe4da4e28..edcd51be15 100644 --- a/hw/9pfs/9p.h +++ b/hw/9pfs/9p.h @@ -131,9 +131,9 @@ struct V9fsPDU uint8_t id; uint8_t cancelled; CoQueue complete; - VirtQueueElement elem; struct V9fsState *s; QLIST_ENTRY(V9fsPDU) next; + uint32_t idx; }; @@ -205,16 +205,12 @@ struct V9fsFidState typedef struct V9fsState { - VirtIODevice parent_obj; - VirtQueue *vq; - V9fsPDU pdus[MAX_REQ]; QLIST_HEAD(, V9fsPDU) free_list; QLIST_HEAD(, V9fsPDU) active_list; V9fsFidState *fid_list; FileOperations *ops; FsContext ctx; char *tag; - size_t config_size; enum p9_proto_version proto_version; int32_t msize; /* diff --git a/hw/9pfs/virtio-9p-device.c b/hw/9pfs/virtio-9p-device.c index 9cfcbc6b7e..b02e7f9d2a 100644 --- a/hw/9pfs/virtio-9p-device.c +++ b/hw/9pfs/virtio-9p-device.c @@ -21,25 +21,44 @@ #include "hw/virtio/virtio-access.h" #include "qemu/iov.h" +void virtio_9p_push_and_notify(V9fsPDU *pdu) +{ + V9fsState *s = pdu->s; + V9fsVirtioState *v = container_of(s, V9fsVirtioState, state); + VirtQueueElement *elem = &v->elems[pdu->idx]; + + /* push onto queue and notify */ + virtqueue_push(v->vq, elem, pdu->size); + + /* FIXME: we should batch these completions */ + virtio_notify(VIRTIO_DEVICE(v), v->vq); +} + static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) { - V9fsState *s = (V9fsState *)vdev; + V9fsVirtioState *v = (V9fsVirtioState *)vdev; + V9fsState *s = &v->state; V9fsPDU *pdu; ssize_t len; - while ((pdu = pdu_alloc(s)) && - (len = virtqueue_pop(vq, &pdu->elem)) != 0) { + while ((pdu = pdu_alloc(s))) { struct { uint32_t size_le; uint8_t id; uint16_t tag_le; } QEMU_PACKED out; - int len; + VirtQueueElement *elem = &v->elems[pdu->idx]; + + len = virtqueue_pop(vq, elem); + if (!len) { + pdu_free(pdu); + break; + } - BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); + BUG_ON(elem->out_num == 0 || elem->in_num == 0); QEMU_BUILD_BUG_ON(sizeof out != 7); - len = iov_to_buf(pdu->elem.out_sg, pdu->elem.out_num, 0, + len = iov_to_buf(elem->out_sg, elem->out_num, 0, &out, sizeof out); BUG_ON(len != sizeof out); @@ -51,18 +70,6 @@ static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) qemu_co_queue_init(&pdu->complete); pdu_submit(pdu); } - pdu_free(pdu); -} - -void virtio_9p_push_and_notify(V9fsPDU *pdu) -{ - V9fsState *s = pdu->s; - - /* push onto queue and notify */ - virtqueue_push(s->vq, &pdu->elem, pdu->size); - - /* FIXME: we should batch these completions */ - virtio_notify(VIRTIO_DEVICE(s), s->vq); } static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features) @@ -75,14 +82,15 @@ static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config) { int len; struct virtio_9p_config *cfg; - V9fsState *s = VIRTIO_9P(vdev); + V9fsVirtioState *v = VIRTIO_9P(vdev); + V9fsState *s = &v->state; len = strlen(s->tag); cfg = g_malloc0(sizeof(struct virtio_9p_config) + len); virtio_stw_p(vdev, &cfg->tag_len, len); /* We don't copy the terminating null to config space */ memcpy(cfg->tag, s->tag, len); - memcpy(config, cfg, s->config_size); + memcpy(config, cfg, v->config_size); g_free(cfg); } @@ -99,16 +107,17 @@ static int virtio_9p_load(QEMUFile *f, void *opaque, int version_id) static void virtio_9p_device_realize(DeviceState *dev, Error **errp) { VirtIODevice *vdev = VIRTIO_DEVICE(dev); - V9fsState *s = VIRTIO_9P(dev); + V9fsVirtioState *v = VIRTIO_9P(dev); + V9fsState *s = &v->state; if (v9fs_device_realize_common(s, errp)) { goto out; } - s->config_size = sizeof(struct virtio_9p_config) + strlen(s->fsconf.tag); - virtio_init(vdev, "virtio-9p", VIRTIO_ID_9P, s->config_size); - s->vq = virtio_add_queue(vdev, MAX_REQ, handle_9p_output); - register_savevm(dev, "virtio-9p", -1, 1, virtio_9p_save, virtio_9p_load, s); + v->config_size = sizeof(struct virtio_9p_config) + strlen(s->fsconf.tag); + virtio_init(vdev, "virtio-9p", VIRTIO_ID_9P, v->config_size); + v->vq = virtio_add_queue(vdev, MAX_REQ, handle_9p_output); + register_savevm(dev, "virtio-9p", -1, 1, virtio_9p_save, virtio_9p_load, v); out: return; @@ -117,44 +126,55 @@ out: static void virtio_9p_device_unrealize(DeviceState *dev, Error **errp) { VirtIODevice *vdev = VIRTIO_DEVICE(dev); - V9fsState *s = VIRTIO_9P(dev); + V9fsVirtioState *v = VIRTIO_9P(dev); + V9fsState *s = &v->state; virtio_cleanup(vdev); - unregister_savevm(dev, "virtio-9p", s); + unregister_savevm(dev, "virtio-9p", v); v9fs_device_unrealize_common(s, errp); } ssize_t virtio_pdu_vmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, va_list ap) { - return v9fs_iov_vmarshal(pdu->elem.in_sg, pdu->elem.in_num, - offset, 1, fmt, ap); + V9fsState *s = pdu->s; + V9fsVirtioState *v = container_of(s, V9fsVirtioState, state); + VirtQueueElement *elem = &v->elems[pdu->idx]; + + return v9fs_iov_vmarshal(elem->in_sg, elem->in_num, offset, 1, fmt, ap); } ssize_t virtio_pdu_vunmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, va_list ap) { - return v9fs_iov_vunmarshal(pdu->elem.out_sg, pdu->elem.out_num, - offset, 1, fmt, ap); + V9fsState *s = pdu->s; + V9fsVirtioState *v = container_of(s, V9fsVirtioState, state); + VirtQueueElement *elem = &v->elems[pdu->idx]; + + return v9fs_iov_vunmarshal(elem->out_sg, elem->out_num, offset, 1, fmt, ap); } void virtio_init_iov_from_pdu(V9fsPDU *pdu, struct iovec **piov, unsigned int *pniov, bool is_write) { + V9fsState *s = pdu->s; + V9fsVirtioState *v = container_of(s, V9fsVirtioState, state); + VirtQueueElement *elem = &v->elems[pdu->idx]; + if (is_write) { - *piov = pdu->elem.out_sg; - *pniov = pdu->elem.out_num; + *piov = elem->out_sg; + *pniov = elem->out_num; } else { - *piov = pdu->elem.in_sg; - *pniov = pdu->elem.in_num; + *piov = elem->in_sg; + *pniov = elem->in_num; } } /* virtio-9p device */ static Property virtio_9p_properties[] = { - DEFINE_PROP_STRING("mount_tag", V9fsState, fsconf.tag), - DEFINE_PROP_STRING("fsdev", V9fsState, fsconf.fsdev_id), + DEFINE_PROP_STRING("mount_tag", V9fsVirtioState, state.fsconf.tag), + DEFINE_PROP_STRING("fsdev", V9fsVirtioState, state.fsconf.fsdev_id), DEFINE_PROP_END_OF_LIST(), }; @@ -174,7 +194,7 @@ static void virtio_9p_class_init(ObjectClass *klass, void *data) static const TypeInfo virtio_device_info = { .name = TYPE_VIRTIO_9P, .parent = TYPE_VIRTIO_DEVICE, - .instance_size = sizeof(V9fsState), + .instance_size = sizeof(V9fsVirtioState), .class_init = virtio_9p_class_init, }; diff --git a/hw/9pfs/virtio-9p.h b/hw/9pfs/virtio-9p.h index 474ab94c08..1cdf0a2d65 100644 --- a/hw/9pfs/virtio-9p.h +++ b/hw/9pfs/virtio-9p.h @@ -5,6 +5,16 @@ #include "hw/virtio/virtio.h" #include "9p.h" +typedef struct V9fsVirtioState +{ + VirtIODevice parent_obj; + VirtQueue *vq; + size_t config_size; + V9fsPDU pdus[MAX_REQ]; + VirtQueueElement elems[MAX_REQ]; + V9fsState state; +} V9fsVirtioState; + extern void virtio_9p_push_and_notify(V9fsPDU *pdu); ssize_t virtio_pdu_vmarshal(V9fsPDU *pdu, size_t offset, @@ -16,6 +26,6 @@ void virtio_init_iov_from_pdu(V9fsPDU *pdu, struct iovec **piov, #define TYPE_VIRTIO_9P "virtio-9p-device" #define VIRTIO_9P(obj) \ - OBJECT_CHECK(V9fsState, (obj), TYPE_VIRTIO_9P) + OBJECT_CHECK(V9fsVirtioState, (obj), TYPE_VIRTIO_9P) #endif diff --git a/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h index 1d779242e7..e43ade0db9 100644 --- a/hw/virtio/virtio-pci.h +++ b/hw/virtio/virtio-pci.h @@ -181,7 +181,7 @@ struct VirtIONetPCI { typedef struct V9fsPCIState { VirtIOPCIProxy parent_obj; - V9fsState vdev; + V9fsVirtioState vdev; } V9fsPCIState; #endif
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