root / hw / 9pfs / virtio-9p-device.c @ 9bba1eb1
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1 | f4f61d27 | Aneesh Kumar K.V | /*
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2 | f4f61d27 | Aneesh Kumar K.V | * Virtio 9p backend
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3 | f4f61d27 | Aneesh Kumar K.V | *
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4 | f4f61d27 | Aneesh Kumar K.V | * Copyright IBM, Corp. 2010
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5 | f4f61d27 | Aneesh Kumar K.V | *
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6 | f4f61d27 | Aneesh Kumar K.V | * Authors:
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7 | f4f61d27 | Aneesh Kumar K.V | * Anthony Liguori <aliguori@us.ibm.com>
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8 | f4f61d27 | Aneesh Kumar K.V | *
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9 | f4f61d27 | Aneesh Kumar K.V | * This work is licensed under the terms of the GNU GPL, version 2. See
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10 | f4f61d27 | Aneesh Kumar K.V | * the COPYING file in the top-level directory.
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11 | f4f61d27 | Aneesh Kumar K.V | *
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12 | f4f61d27 | Aneesh Kumar K.V | */
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13 | f4f61d27 | Aneesh Kumar K.V | |
14 | 873c3213 | Stefan Weil | #include "hw/virtio.h" |
15 | 873c3213 | Stefan Weil | #include "hw/pc.h" |
16 | f4f61d27 | Aneesh Kumar K.V | #include "qemu_socket.h" |
17 | 873c3213 | Stefan Weil | #include "hw/virtio-pci.h" |
18 | f4f61d27 | Aneesh Kumar K.V | #include "virtio-9p.h" |
19 | f4f61d27 | Aneesh Kumar K.V | #include "fsdev/qemu-fsdev.h" |
20 | f4f61d27 | Aneesh Kumar K.V | #include "virtio-9p-xattr.h" |
21 | f4f61d27 | Aneesh Kumar K.V | |
22 | f4f61d27 | Aneesh Kumar K.V | static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features)
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23 | f4f61d27 | Aneesh Kumar K.V | { |
24 | f4f61d27 | Aneesh Kumar K.V | features |= 1 << VIRTIO_9P_MOUNT_TAG;
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25 | f4f61d27 | Aneesh Kumar K.V | return features;
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26 | f4f61d27 | Aneesh Kumar K.V | } |
27 | f4f61d27 | Aneesh Kumar K.V | |
28 | f4f61d27 | Aneesh Kumar K.V | static V9fsState *to_virtio_9p(VirtIODevice *vdev)
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29 | f4f61d27 | Aneesh Kumar K.V | { |
30 | f4f61d27 | Aneesh Kumar K.V | return (V9fsState *)vdev;
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31 | f4f61d27 | Aneesh Kumar K.V | } |
32 | f4f61d27 | Aneesh Kumar K.V | |
33 | f4f61d27 | Aneesh Kumar K.V | static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config) |
34 | f4f61d27 | Aneesh Kumar K.V | { |
35 | f4f61d27 | Aneesh Kumar K.V | struct virtio_9p_config *cfg;
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36 | f4f61d27 | Aneesh Kumar K.V | V9fsState *s = to_virtio_9p(vdev); |
37 | f4f61d27 | Aneesh Kumar K.V | |
38 | f4f61d27 | Aneesh Kumar K.V | cfg = qemu_mallocz(sizeof(struct virtio_9p_config) + |
39 | f4f61d27 | Aneesh Kumar K.V | s->tag_len); |
40 | f4f61d27 | Aneesh Kumar K.V | stw_raw(&cfg->tag_len, s->tag_len); |
41 | f4f61d27 | Aneesh Kumar K.V | memcpy(cfg->tag, s->tag, s->tag_len); |
42 | f4f61d27 | Aneesh Kumar K.V | memcpy(config, cfg, s->config_size); |
43 | f4f61d27 | Aneesh Kumar K.V | qemu_free(cfg); |
44 | f4f61d27 | Aneesh Kumar K.V | } |
45 | f4f61d27 | Aneesh Kumar K.V | |
46 | f4f61d27 | Aneesh Kumar K.V | VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf) |
47 | f4f61d27 | Aneesh Kumar K.V | { |
48 | f4f61d27 | Aneesh Kumar K.V | V9fsState *s; |
49 | f4f61d27 | Aneesh Kumar K.V | int i, len;
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50 | f4f61d27 | Aneesh Kumar K.V | struct stat stat;
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51 | f4f61d27 | Aneesh Kumar K.V | FsTypeEntry *fse; |
52 | f4f61d27 | Aneesh Kumar K.V | |
53 | f4f61d27 | Aneesh Kumar K.V | |
54 | f4f61d27 | Aneesh Kumar K.V | s = (V9fsState *)virtio_common_init("virtio-9p",
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55 | f4f61d27 | Aneesh Kumar K.V | VIRTIO_ID_9P, |
56 | f4f61d27 | Aneesh Kumar K.V | sizeof(struct virtio_9p_config)+ |
57 | f4f61d27 | Aneesh Kumar K.V | MAX_TAG_LEN, |
58 | f4f61d27 | Aneesh Kumar K.V | sizeof(V9fsState));
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59 | f4f61d27 | Aneesh Kumar K.V | |
60 | f4f61d27 | Aneesh Kumar K.V | /* initialize pdu allocator */
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61 | f4f61d27 | Aneesh Kumar K.V | QLIST_INIT(&s->free_list); |
62 | f4f61d27 | Aneesh Kumar K.V | for (i = 0; i < (MAX_REQ - 1); i++) { |
63 | f4f61d27 | Aneesh Kumar K.V | QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); |
64 | f4f61d27 | Aneesh Kumar K.V | } |
65 | f4f61d27 | Aneesh Kumar K.V | |
66 | f4f61d27 | Aneesh Kumar K.V | s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output); |
67 | f4f61d27 | Aneesh Kumar K.V | |
68 | f4f61d27 | Aneesh Kumar K.V | fse = get_fsdev_fsentry(conf->fsdev_id); |
69 | f4f61d27 | Aneesh Kumar K.V | |
70 | f4f61d27 | Aneesh Kumar K.V | if (!fse) {
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71 | f4f61d27 | Aneesh Kumar K.V | /* We don't have a fsdev identified by fsdev_id */
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72 | f4f61d27 | Aneesh Kumar K.V | fprintf(stderr, "Virtio-9p device couldn't find fsdev with the "
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73 | f4f61d27 | Aneesh Kumar K.V | "id = %s\n", conf->fsdev_id ? conf->fsdev_id : "NULL"); |
74 | f4f61d27 | Aneesh Kumar K.V | exit(1);
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75 | f4f61d27 | Aneesh Kumar K.V | } |
76 | f4f61d27 | Aneesh Kumar K.V | |
77 | f4f61d27 | Aneesh Kumar K.V | if (!fse->path || !conf->tag) {
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78 | f4f61d27 | Aneesh Kumar K.V | /* we haven't specified a mount_tag or the path */
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79 | f4f61d27 | Aneesh Kumar K.V | fprintf(stderr, "fsdev with id %s needs path "
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80 | f4f61d27 | Aneesh Kumar K.V | "and Virtio-9p device needs mount_tag arguments\n",
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81 | f4f61d27 | Aneesh Kumar K.V | conf->fsdev_id); |
82 | f4f61d27 | Aneesh Kumar K.V | exit(1);
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83 | f4f61d27 | Aneesh Kumar K.V | } |
84 | f4f61d27 | Aneesh Kumar K.V | |
85 | f4f61d27 | Aneesh Kumar K.V | if (!strcmp(fse->security_model, "passthrough")) { |
86 | f4f61d27 | Aneesh Kumar K.V | /* Files on the Fileserver set to client user credentials */
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87 | f4f61d27 | Aneesh Kumar K.V | s->ctx.fs_sm = SM_PASSTHROUGH; |
88 | f4f61d27 | Aneesh Kumar K.V | s->ctx.xops = passthrough_xattr_ops; |
89 | f4f61d27 | Aneesh Kumar K.V | } else if (!strcmp(fse->security_model, "mapped")) { |
90 | f4f61d27 | Aneesh Kumar K.V | /* Files on the fileserver are set to QEMU credentials.
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91 | f4f61d27 | Aneesh Kumar K.V | * Client user credentials are saved in extended attributes.
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92 | f4f61d27 | Aneesh Kumar K.V | */
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93 | f4f61d27 | Aneesh Kumar K.V | s->ctx.fs_sm = SM_MAPPED; |
94 | f4f61d27 | Aneesh Kumar K.V | s->ctx.xops = mapped_xattr_ops; |
95 | f4f61d27 | Aneesh Kumar K.V | } else if (!strcmp(fse->security_model, "none")) { |
96 | f4f61d27 | Aneesh Kumar K.V | /*
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97 | f4f61d27 | Aneesh Kumar K.V | * Files on the fileserver are set to QEMU credentials.
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98 | f4f61d27 | Aneesh Kumar K.V | */
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99 | f4f61d27 | Aneesh Kumar K.V | s->ctx.fs_sm = SM_NONE; |
100 | f4f61d27 | Aneesh Kumar K.V | s->ctx.xops = none_xattr_ops; |
101 | f4f61d27 | Aneesh Kumar K.V | } else {
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102 | f4f61d27 | Aneesh Kumar K.V | fprintf(stderr, "Default to security_model=none. You may want"
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103 | f4f61d27 | Aneesh Kumar K.V | " enable advanced security model using "
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104 | f4f61d27 | Aneesh Kumar K.V | "security option:\n\t security_model=passthrough\n\t "
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105 | f4f61d27 | Aneesh Kumar K.V | "security_model=mapped\n");
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106 | f4f61d27 | Aneesh Kumar K.V | s->ctx.fs_sm = SM_NONE; |
107 | f4f61d27 | Aneesh Kumar K.V | s->ctx.xops = none_xattr_ops; |
108 | f4f61d27 | Aneesh Kumar K.V | } |
109 | f4f61d27 | Aneesh Kumar K.V | |
110 | f4f61d27 | Aneesh Kumar K.V | if (lstat(fse->path, &stat)) {
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111 | f4f61d27 | Aneesh Kumar K.V | fprintf(stderr, "share path %s does not exist\n", fse->path);
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112 | f4f61d27 | Aneesh Kumar K.V | exit(1);
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113 | f4f61d27 | Aneesh Kumar K.V | } else if (!S_ISDIR(stat.st_mode)) { |
114 | f4f61d27 | Aneesh Kumar K.V | fprintf(stderr, "share path %s is not a directory\n", fse->path);
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115 | f4f61d27 | Aneesh Kumar K.V | exit(1);
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116 | f4f61d27 | Aneesh Kumar K.V | } |
117 | f4f61d27 | Aneesh Kumar K.V | |
118 | f4f61d27 | Aneesh Kumar K.V | s->ctx.fs_root = qemu_strdup(fse->path); |
119 | f4f61d27 | Aneesh Kumar K.V | len = strlen(conf->tag); |
120 | f4f61d27 | Aneesh Kumar K.V | if (len > MAX_TAG_LEN) {
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121 | f4f61d27 | Aneesh Kumar K.V | len = MAX_TAG_LEN; |
122 | f4f61d27 | Aneesh Kumar K.V | } |
123 | f4f61d27 | Aneesh Kumar K.V | /* s->tag is non-NULL terminated string */
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124 | f4f61d27 | Aneesh Kumar K.V | s->tag = qemu_malloc(len); |
125 | f4f61d27 | Aneesh Kumar K.V | memcpy(s->tag, conf->tag, len); |
126 | f4f61d27 | Aneesh Kumar K.V | s->tag_len = len; |
127 | f4f61d27 | Aneesh Kumar K.V | s->ctx.uid = -1;
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128 | f4f61d27 | Aneesh Kumar K.V | |
129 | f4f61d27 | Aneesh Kumar K.V | s->ops = fse->ops; |
130 | f4f61d27 | Aneesh Kumar K.V | s->vdev.get_features = virtio_9p_get_features; |
131 | f4f61d27 | Aneesh Kumar K.V | s->config_size = sizeof(struct virtio_9p_config) + |
132 | f4f61d27 | Aneesh Kumar K.V | s->tag_len; |
133 | f4f61d27 | Aneesh Kumar K.V | s->vdev.get_config = virtio_9p_get_config; |
134 | f4f61d27 | Aneesh Kumar K.V | |
135 | f4f61d27 | Aneesh Kumar K.V | return &s->vdev;
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136 | f4f61d27 | Aneesh Kumar K.V | } |
137 | f4f61d27 | Aneesh Kumar K.V | |
138 | f4f61d27 | Aneesh Kumar K.V | static int virtio_9p_init_pci(PCIDevice *pci_dev) |
139 | f4f61d27 | Aneesh Kumar K.V | { |
140 | f4f61d27 | Aneesh Kumar K.V | VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
141 | f4f61d27 | Aneesh Kumar K.V | VirtIODevice *vdev; |
142 | f4f61d27 | Aneesh Kumar K.V | |
143 | f4f61d27 | Aneesh Kumar K.V | vdev = virtio_9p_init(&pci_dev->qdev, &proxy->fsconf); |
144 | f4f61d27 | Aneesh Kumar K.V | vdev->nvectors = proxy->nvectors; |
145 | f4f61d27 | Aneesh Kumar K.V | virtio_init_pci(proxy, vdev, |
146 | f4f61d27 | Aneesh Kumar K.V | PCI_VENDOR_ID_REDHAT_QUMRANET, |
147 | f4f61d27 | Aneesh Kumar K.V | 0x1009,
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148 | f4f61d27 | Aneesh Kumar K.V | 0x2,
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149 | f4f61d27 | Aneesh Kumar K.V | 0x00);
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150 | f4f61d27 | Aneesh Kumar K.V | /* make the actual value visible */
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151 | f4f61d27 | Aneesh Kumar K.V | proxy->nvectors = vdev->nvectors; |
152 | f4f61d27 | Aneesh Kumar K.V | return 0; |
153 | f4f61d27 | Aneesh Kumar K.V | } |
154 | f4f61d27 | Aneesh Kumar K.V | |
155 | f4f61d27 | Aneesh Kumar K.V | static PCIDeviceInfo virtio_9p_info = {
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156 | f4f61d27 | Aneesh Kumar K.V | .qdev.name = "virtio-9p-pci",
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157 | f4f61d27 | Aneesh Kumar K.V | .qdev.size = sizeof(VirtIOPCIProxy),
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158 | f4f61d27 | Aneesh Kumar K.V | .init = virtio_9p_init_pci, |
159 | f4f61d27 | Aneesh Kumar K.V | .qdev.props = (Property[]) { |
160 | f4f61d27 | Aneesh Kumar K.V | DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), |
161 | f4f61d27 | Aneesh Kumar K.V | DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
162 | f4f61d27 | Aneesh Kumar K.V | DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy, fsconf.tag),
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163 | f4f61d27 | Aneesh Kumar K.V | DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy, fsconf.fsdev_id),
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164 | f4f61d27 | Aneesh Kumar K.V | DEFINE_PROP_END_OF_LIST(), |
165 | f4f61d27 | Aneesh Kumar K.V | } |
166 | f4f61d27 | Aneesh Kumar K.V | }; |
167 | f4f61d27 | Aneesh Kumar K.V | |
168 | f4f61d27 | Aneesh Kumar K.V | static void virtio_9p_register_devices(void) |
169 | f4f61d27 | Aneesh Kumar K.V | { |
170 | f4f61d27 | Aneesh Kumar K.V | pci_qdev_register(&virtio_9p_info); |
171 | f4f61d27 | Aneesh Kumar K.V | } |
172 | f4f61d27 | Aneesh Kumar K.V | |
173 | f4f61d27 | Aneesh Kumar K.V | device_init(virtio_9p_register_devices) |