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Return to virtio-9p-device.c CVS log | Up to [Qemu by Fabrice Bellard] / qemu / hw / 9pfs |
1.1 root 1: /*
2: * Virtio 9p backend
3: *
4: * Copyright IBM, Corp. 2010
5: *
6: * Authors:
7: * Anthony Liguori <[email protected]>
8: *
9: * This work is licensed under the terms of the GNU GPL, version 2. See
10: * the COPYING file in the top-level directory.
11: *
12: */
13:
14: #include "hw/virtio.h"
15: #include "hw/pc.h"
16: #include "qemu_socket.h"
17: #include "hw/virtio-pci.h"
18: #include "virtio-9p.h"
19: #include "fsdev/qemu-fsdev.h"
20: #include "virtio-9p-xattr.h"
1.1.1.2 root 21: #include "virtio-9p-coth.h"
1.1 root 22:
23: static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features)
24: {
25: features |= 1 << VIRTIO_9P_MOUNT_TAG;
26: return features;
27: }
28:
29: static V9fsState *to_virtio_9p(VirtIODevice *vdev)
30: {
31: return (V9fsState *)vdev;
32: }
33:
34: static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config)
35: {
1.1.1.2 root 36: int len;
1.1 root 37: struct virtio_9p_config *cfg;
38: V9fsState *s = to_virtio_9p(vdev);
39:
1.1.1.2 root 40: len = strlen(s->tag);
41: cfg = g_malloc0(sizeof(struct virtio_9p_config) + len);
42: stw_raw(&cfg->tag_len, len);
43: /* We don't copy the terminating null to config space */
44: memcpy(cfg->tag, s->tag, len);
1.1 root 45: memcpy(config, cfg, s->config_size);
1.1.1.2 root 46: g_free(cfg);
1.1 root 47: }
48:
49: VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
1.1.1.2 root 50: {
1.1 root 51: V9fsState *s;
52: int i, len;
53: struct stat stat;
1.1.1.2 root 54: FsDriverEntry *fse;
55: V9fsPath path;
1.1 root 56:
57: s = (V9fsState *)virtio_common_init("virtio-9p",
58: VIRTIO_ID_9P,
59: sizeof(struct virtio_9p_config)+
60: MAX_TAG_LEN,
61: sizeof(V9fsState));
62: /* initialize pdu allocator */
63: QLIST_INIT(&s->free_list);
1.1.1.2 root 64: QLIST_INIT(&s->active_list);
1.1 root 65: for (i = 0; i < (MAX_REQ - 1); i++) {
66: QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next);
67: }
68:
69: s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output);
70:
71: fse = get_fsdev_fsentry(conf->fsdev_id);
72:
73: if (!fse) {
74: /* We don't have a fsdev identified by fsdev_id */
75: fprintf(stderr, "Virtio-9p device couldn't find fsdev with the "
76: "id = %s\n", conf->fsdev_id ? conf->fsdev_id : "NULL");
77: exit(1);
78: }
79:
1.1.1.3 ! root 80: if (!conf->tag) {
! 81: /* we haven't specified a mount_tag */
! 82: fprintf(stderr, "fsdev with id %s needs mount_tag arguments\n",
1.1 root 83: conf->fsdev_id);
84: exit(1);
85: }
86:
1.1.1.2 root 87: s->ctx.export_flags = fse->export_flags;
1.1.1.3 ! root 88: if (fse->path) {
! 89: s->ctx.fs_root = g_strdup(fse->path);
! 90: } else {
! 91: s->ctx.fs_root = NULL;
1.1 root 92: }
1.1.1.3 ! root 93: s->ctx.exops.get_st_gen = NULL;
1.1.1.2 root 94: len = strlen(conf->tag);
95: if (len > MAX_TAG_LEN - 1) {
96: fprintf(stderr, "mount tag '%s' (%d bytes) is longer than "
97: "maximum (%d bytes)", conf->tag, len, MAX_TAG_LEN - 1);
1.1 root 98: exit(1);
99: }
100:
1.1.1.2 root 101: s->tag = strdup(conf->tag);
1.1 root 102: s->ctx.uid = -1;
103:
104: s->ops = fse->ops;
105: s->vdev.get_features = virtio_9p_get_features;
1.1.1.2 root 106: s->config_size = sizeof(struct virtio_9p_config) + len;
1.1 root 107: s->vdev.get_config = virtio_9p_get_config;
1.1.1.2 root 108: s->fid_list = NULL;
109: qemu_co_rwlock_init(&s->rename_lock);
110:
111: if (s->ops->init(&s->ctx) < 0) {
112: fprintf(stderr, "Virtio-9p Failed to initialize fs-driver with id:%s"
113: " and export path:%s\n", conf->fsdev_id, s->ctx.fs_root);
114: exit(1);
115: }
116: if (v9fs_init_worker_threads() < 0) {
117: fprintf(stderr, "worker thread initialization failed\n");
118: exit(1);
119: }
120:
121: /*
122: * Check details of export path, We need to use fs driver
123: * call back to do that. Since we are in the init path, we don't
124: * use co-routines here.
125: */
126: v9fs_path_init(&path);
127: if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) {
128: fprintf(stderr,
129: "error in converting name to path %s", strerror(errno));
130: exit(1);
131: }
132: if (s->ops->lstat(&s->ctx, &path, &stat)) {
133: fprintf(stderr, "share path %s does not exist\n", fse->path);
134: exit(1);
135: } else if (!S_ISDIR(stat.st_mode)) {
136: fprintf(stderr, "share path %s is not a directory\n", fse->path);
137: exit(1);
138: }
139: v9fs_path_free(&path);
1.1 root 140:
141: return &s->vdev;
142: }
143:
144: static int virtio_9p_init_pci(PCIDevice *pci_dev)
145: {
146: VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
147: VirtIODevice *vdev;
148:
149: vdev = virtio_9p_init(&pci_dev->qdev, &proxy->fsconf);
150: vdev->nvectors = proxy->nvectors;
151: virtio_init_pci(proxy, vdev);
152: /* make the actual value visible */
153: proxy->nvectors = vdev->nvectors;
154: return 0;
155: }
156:
1.1.1.3 ! root 157: static Property virtio_9p_properties[] = {
! 158: DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
! 159: DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
! 160: DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
! 161: DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy, fsconf.tag),
! 162: DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy, fsconf.fsdev_id),
! 163: DEFINE_PROP_END_OF_LIST(),
! 164: };
! 165:
! 166: static void virtio_9p_class_init(ObjectClass *klass, void *data)
! 167: {
! 168: DeviceClass *dc = DEVICE_CLASS(klass);
! 169: PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
! 170:
! 171: k->init = virtio_9p_init_pci;
! 172: k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
! 173: k->device_id = 0x1009;
! 174: k->revision = VIRTIO_PCI_ABI_VERSION;
! 175: k->class_id = 0x2;
! 176: dc->props = virtio_9p_properties;
! 177: dc->reset = virtio_pci_reset;
! 178: }
! 179:
! 180: static TypeInfo virtio_9p_info = {
! 181: .name = "virtio-9p-pci",
! 182: .parent = TYPE_PCI_DEVICE,
! 183: .instance_size = sizeof(VirtIOPCIProxy),
! 184: .class_init = virtio_9p_class_init,
1.1 root 185: };
186:
1.1.1.3 ! root 187: static void virtio_9p_register_types(void)
1.1 root 188: {
1.1.1.3 ! root 189: type_register_static(&virtio_9p_info);
1.1.1.2 root 190: virtio_9p_set_fd_limit();
1.1 root 191: }
192:
1.1.1.3 ! root 193: type_init(virtio_9p_register_types)
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