virtio-9p: Move device specific code to virtio-9p-device

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>

1 files changed, 173 insertions, 0 deletions

diff --git a/hw/9pfs/virtio-9p-device.c b/hw/9pfs/virtio-9p-device.c
new file mode 100644
index 0000000000..f9854861aa
--- /dev/null
+++ b/hw/9pfs/virtio-9p-device.c
@@ -0,0 +1,173 @@
+/*
+ * Virtio 9p backend
+ *
+ * Copyright IBM, Corp. 2010
+ *
+ * Authors:
+ *  Anthony Liguori   <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#include "virtio.h"
+#include "pc.h"
+#include "qemu_socket.h"
+#include "virtio-pci.h"
+#include "virtio-9p.h"
+#include "fsdev/qemu-fsdev.h"
+#include "virtio-9p-xattr.h"
+
+static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features)
+{
+    features |= 1 << VIRTIO_9P_MOUNT_TAG;
+    return features;
+}
+
+static V9fsState *to_virtio_9p(VirtIODevice *vdev)
+{
+    return (V9fsState *)vdev;
+}
+
+static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config)
+{
+    struct virtio_9p_config *cfg;
+    V9fsState *s = to_virtio_9p(vdev);
+
+    cfg = qemu_mallocz(sizeof(struct virtio_9p_config) +
+                        s->tag_len);
+    stw_raw(&cfg->tag_len, s->tag_len);
+    memcpy(cfg->tag, s->tag, s->tag_len);
+    memcpy(config, cfg, s->config_size);
+    qemu_free(cfg);
+}
+
+VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
+ {
+    V9fsState *s;
+    int i, len;
+    struct stat stat;
+    FsTypeEntry *fse;
+
+
+    s = (V9fsState *)virtio_common_init("virtio-9p",
+                                    VIRTIO_ID_9P,
+                                    sizeof(struct virtio_9p_config)+
+                                    MAX_TAG_LEN,
+                                    sizeof(V9fsState));
+
+    /* initialize pdu allocator */
+    QLIST_INIT(&s->free_list);
+    for (i = 0; i < (MAX_REQ - 1); i++) {
+        QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next);
+    }
+
+    s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output);
+
+    fse = get_fsdev_fsentry(conf->fsdev_id);
+
+    if (!fse) {
+        /* We don't have a fsdev identified by fsdev_id */
+        fprintf(stderr, "Virtio-9p device couldn't find fsdev with the "
+                "id = %s\n", conf->fsdev_id ? conf->fsdev_id : "NULL");
+        exit(1);
+    }
+
+    if (!fse->path || !conf->tag) {
+        /* we haven't specified a mount_tag or the path */
+        fprintf(stderr, "fsdev with id %s needs path "
+                "and Virtio-9p device needs mount_tag arguments\n",
+                conf->fsdev_id);
+        exit(1);
+    }
+
+    if (!strcmp(fse->security_model, "passthrough")) {
+        /* Files on the Fileserver set to client user credentials */
+        s->ctx.fs_sm = SM_PASSTHROUGH;
+        s->ctx.xops = passthrough_xattr_ops;
+    } else if (!strcmp(fse->security_model, "mapped")) {
+        /* Files on the fileserver are set to QEMU credentials.
+         * Client user credentials are saved in extended attributes.
+         */
+        s->ctx.fs_sm = SM_MAPPED;
+        s->ctx.xops = mapped_xattr_ops;
+    } else if (!strcmp(fse->security_model, "none")) {
+        /*
+         * Files on the fileserver are set to QEMU credentials.
+         */
+        s->ctx.fs_sm = SM_NONE;
+        s->ctx.xops = none_xattr_ops;
+    } else {
+        fprintf(stderr, "Default to security_model=none. You may want"
+                " enable advanced security model using "
+                "security option:\n\t security_model=passthrough\n\t "
+                "security_model=mapped\n");
+        s->ctx.fs_sm = SM_NONE;
+        s->ctx.xops = none_xattr_ops;
+    }
+
+    if (lstat(fse->path, &stat)) {
+        fprintf(stderr, "share path %s does not exist\n", fse->path);
+        exit(1);
+    } else if (!S_ISDIR(stat.st_mode)) {
+        fprintf(stderr, "share path %s is not a directory\n", fse->path);
+        exit(1);
+    }
+
+    s->ctx.fs_root = qemu_strdup(fse->path);
+    len = strlen(conf->tag);
+    if (len > MAX_TAG_LEN) {
+        len = MAX_TAG_LEN;
+    }
+    /* s->tag is non-NULL terminated string */
+    s->tag = qemu_malloc(len);
+    memcpy(s->tag, conf->tag, len);
+    s->tag_len = len;
+    s->ctx.uid = -1;
+
+    s->ops = fse->ops;
+    s->vdev.get_features = virtio_9p_get_features;
+    s->config_size = sizeof(struct virtio_9p_config) +
+                        s->tag_len;
+    s->vdev.get_config = virtio_9p_get_config;
+
+    return &s->vdev;
+}
+
+static int virtio_9p_init_pci(PCIDevice *pci_dev)
+{
+    VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
+    VirtIODevice *vdev;
+
+    vdev = virtio_9p_init(&pci_dev->qdev, &proxy->fsconf);
+    vdev->nvectors = proxy->nvectors;
+    virtio_init_pci(proxy, vdev,
+                    PCI_VENDOR_ID_REDHAT_QUMRANET,
+                    0x1009,
+                    0x2,
+                    0x00);
+    /* make the actual value visible */
+    proxy->nvectors = vdev->nvectors;
+    return 0;
+}
+
+static PCIDeviceInfo virtio_9p_info = {
+    .qdev.name = "virtio-9p-pci",
+    .qdev.size = sizeof(VirtIOPCIProxy),
+    .init      = virtio_9p_init_pci,
+    .qdev.props = (Property[]) {
+        DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
+        DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
+        DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy, fsconf.tag),
+        DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy, fsconf.fsdev_id),
+        DEFINE_PROP_END_OF_LIST(),
+    }
+};
+
+static void virtio_9p_register_devices(void)
+{
+    pci_qdev_register(&virtio_9p_info);
+}
+
+device_init(virtio_9p_register_devices)