1#include "qemu/osdep.h"
2#include "hw/xen/xen_backend.h"
3#include "sysemu/block-backend.h"
4#include "sysemu/blockdev.h"
5
6
7
8struct xs_dirs {
9 char *xs_dir;
10 QTAILQ_ENTRY(xs_dirs) list;
11};
12static QTAILQ_HEAD(xs_dirs_head, xs_dirs) xs_cleanup = QTAILQ_HEAD_INITIALIZER(xs_cleanup);
13
14static void xen_config_cleanup_dir(char *dir)
15{
16 struct xs_dirs *d;
17
18 d = g_malloc(sizeof(*d));
19 d->xs_dir = dir;
20 QTAILQ_INSERT_TAIL(&xs_cleanup, d, list);
21}
22
23void xen_config_cleanup(void)
24{
25 struct xs_dirs *d;
26
27 QTAILQ_FOREACH(d, &xs_cleanup, list) {
28 xs_rm(xenstore, 0, d->xs_dir);
29 }
30}
31
32
33
34static int xen_config_dev_mkdir(char *dev, int p)
35{
36 struct xs_permissions perms[2] = {{
37 .id = 0,
38 },{
39 .id = xen_domid,
40 .perms = p,
41 }};
42
43 if (!xs_mkdir(xenstore, 0, dev)) {
44 xen_be_printf(NULL, 0, "xs_mkdir %s: failed\n", dev);
45 return -1;
46 }
47 xen_config_cleanup_dir(g_strdup(dev));
48
49 if (!xs_set_permissions(xenstore, 0, dev, perms, 2)) {
50 xen_be_printf(NULL, 0, "xs_set_permissions %s: failed\n", dev);
51 return -1;
52 }
53 return 0;
54}
55
56static int xen_config_dev_dirs(const char *ftype, const char *btype, int vdev,
57 char *fe, char *be, int len)
58{
59 char *dom;
60
61 dom = xs_get_domain_path(xenstore, xen_domid);
62 snprintf(fe, len, "%s/device/%s/%d", dom, ftype, vdev);
63 free(dom);
64
65 dom = xs_get_domain_path(xenstore, 0);
66 snprintf(be, len, "%s/backend/%s/%d/%d", dom, btype, xen_domid, vdev);
67 free(dom);
68
69 xen_config_dev_mkdir(fe, XS_PERM_READ | XS_PERM_WRITE);
70 xen_config_dev_mkdir(be, XS_PERM_READ);
71 return 0;
72}
73
74static int xen_config_dev_all(char *fe, char *be)
75{
76
77 if (xen_protocol)
78 xenstore_write_str(fe, "protocol", xen_protocol);
79
80 xenstore_write_int(fe, "state", XenbusStateInitialising);
81 xenstore_write_int(fe, "backend-id", 0);
82 xenstore_write_str(fe, "backend", be);
83
84
85 xenstore_write_str(be, "domain", qemu_name ? qemu_name : "no-name");
86 xenstore_write_int(be, "online", 1);
87 xenstore_write_int(be, "state", XenbusStateInitialising);
88 xenstore_write_int(be, "frontend-id", xen_domid);
89 xenstore_write_str(be, "frontend", fe);
90
91 return 0;
92}
93
94
95
96int xen_config_dev_blk(DriveInfo *disk)
97{
98 char fe[256], be[256], device_name[32];
99 int vdev = 202 * 256 + 16 * disk->unit;
100 int cdrom = disk->media_cd;
101 const char *devtype = cdrom ? "cdrom" : "disk";
102 const char *mode = cdrom ? "r" : "w";
103 const char *filename = qemu_opt_get(disk->opts, "file");
104
105 snprintf(device_name, sizeof(device_name), "xvd%c", 'a' + disk->unit);
106 xen_be_printf(NULL, 1, "config disk %d [%s]: %s\n",
107 disk->unit, device_name, filename);
108 xen_config_dev_dirs("vbd", "qdisk", vdev, fe, be, sizeof(fe));
109
110
111 xenstore_write_int(fe, "virtual-device", vdev);
112 xenstore_write_str(fe, "device-type", devtype);
113
114
115 xenstore_write_str(be, "dev", device_name);
116 xenstore_write_str(be, "type", "file");
117 xenstore_write_str(be, "params", filename);
118 xenstore_write_str(be, "mode", mode);
119
120
121 return xen_config_dev_all(fe, be);
122}
123
124int xen_config_dev_nic(NICInfo *nic)
125{
126 char fe[256], be[256];
127 char mac[20];
128 int vlan_id = -1;
129
130 net_hub_id_for_client(nic->netdev, &vlan_id);
131 snprintf(mac, sizeof(mac), "%02x:%02x:%02x:%02x:%02x:%02x",
132 nic->macaddr.a[0], nic->macaddr.a[1], nic->macaddr.a[2],
133 nic->macaddr.a[3], nic->macaddr.a[4], nic->macaddr.a[5]);
134 xen_be_printf(NULL, 1, "config nic %d: mac=\"%s\"\n", vlan_id, mac);
135 xen_config_dev_dirs("vif", "qnic", vlan_id, fe, be, sizeof(fe));
136
137
138 xenstore_write_int(fe, "handle", vlan_id);
139 xenstore_write_str(fe, "mac", mac);
140
141
142 xenstore_write_int(be, "handle", vlan_id);
143 xenstore_write_str(be, "mac", mac);
144
145
146 return xen_config_dev_all(fe, be);
147}
148
149int xen_config_dev_vfb(int vdev, const char *type)
150{
151 char fe[256], be[256];
152
153 xen_config_dev_dirs("vfb", "vfb", vdev, fe, be, sizeof(fe));
154
155
156 xenstore_write_str(be, "type", type);
157
158
159 return xen_config_dev_all(fe, be);
160}
161
162int xen_config_dev_vkbd(int vdev)
163{
164 char fe[256], be[256];
165
166 xen_config_dev_dirs("vkbd", "vkbd", vdev, fe, be, sizeof(fe));
167 return xen_config_dev_all(fe, be);
168}
169
170int xen_config_dev_console(int vdev)
171{
172 char fe[256], be[256];
173
174 xen_config_dev_dirs("console", "console", vdev, fe, be, sizeof(fe));
175 return xen_config_dev_all(fe, be);
176}
177