root / spice-qemu-char.c @ cbcc6336
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1 | cbcc6336 | Alon Levy | #include "config-host.h" |
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2 | cbcc6336 | Alon Levy | #include "trace.h" |
3 | cbcc6336 | Alon Levy | #include "ui/qemu-spice.h" |
4 | cbcc6336 | Alon Levy | #include <spice.h> |
5 | cbcc6336 | Alon Levy | #include <spice-experimental.h> |
6 | cbcc6336 | Alon Levy | |
7 | cbcc6336 | Alon Levy | #include "osdep.h" |
8 | cbcc6336 | Alon Levy | |
9 | cbcc6336 | Alon Levy | #define dprintf(_scd, _level, _fmt, ...) \
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10 | cbcc6336 | Alon Levy | do { \
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11 | cbcc6336 | Alon Levy | static unsigned __dprintf_counter = 0; \ |
12 | cbcc6336 | Alon Levy | if (_scd->debug >= _level) { \
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13 | cbcc6336 | Alon Levy | fprintf(stderr, "scd: %3d: " _fmt, ++__dprintf_counter, ## __VA_ARGS__);\ |
14 | cbcc6336 | Alon Levy | } \ |
15 | cbcc6336 | Alon Levy | } while (0) |
16 | cbcc6336 | Alon Levy | |
17 | cbcc6336 | Alon Levy | #define VMC_MAX_HOST_WRITE 2048 |
18 | cbcc6336 | Alon Levy | |
19 | cbcc6336 | Alon Levy | typedef struct SpiceCharDriver { |
20 | cbcc6336 | Alon Levy | CharDriverState* chr; |
21 | cbcc6336 | Alon Levy | SpiceCharDeviceInstance sin; |
22 | cbcc6336 | Alon Levy | char *subtype;
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23 | cbcc6336 | Alon Levy | bool active;
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24 | cbcc6336 | Alon Levy | uint8_t *buffer; |
25 | cbcc6336 | Alon Levy | uint8_t *datapos; |
26 | cbcc6336 | Alon Levy | ssize_t bufsize, datalen; |
27 | cbcc6336 | Alon Levy | uint32_t debug; |
28 | cbcc6336 | Alon Levy | } SpiceCharDriver; |
29 | cbcc6336 | Alon Levy | |
30 | cbcc6336 | Alon Levy | static int vmc_write(SpiceCharDeviceInstance *sin, const uint8_t *buf, int len) |
31 | cbcc6336 | Alon Levy | { |
32 | cbcc6336 | Alon Levy | SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin); |
33 | cbcc6336 | Alon Levy | ssize_t out = 0;
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34 | cbcc6336 | Alon Levy | ssize_t last_out; |
35 | cbcc6336 | Alon Levy | uint8_t* p = (uint8_t*)buf; |
36 | cbcc6336 | Alon Levy | |
37 | cbcc6336 | Alon Levy | while (len > 0) { |
38 | cbcc6336 | Alon Levy | last_out = MIN(len, VMC_MAX_HOST_WRITE); |
39 | cbcc6336 | Alon Levy | qemu_chr_read(scd->chr, p, last_out); |
40 | cbcc6336 | Alon Levy | if (last_out > 0) { |
41 | cbcc6336 | Alon Levy | out += last_out; |
42 | cbcc6336 | Alon Levy | len -= last_out; |
43 | cbcc6336 | Alon Levy | p += last_out; |
44 | cbcc6336 | Alon Levy | } else {
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45 | cbcc6336 | Alon Levy | break;
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46 | cbcc6336 | Alon Levy | } |
47 | cbcc6336 | Alon Levy | } |
48 | cbcc6336 | Alon Levy | |
49 | cbcc6336 | Alon Levy | dprintf(scd, 3, "%s: %lu/%zd\n", __func__, out, len + out); |
50 | cbcc6336 | Alon Levy | trace_spice_vmc_write(out, len + out); |
51 | cbcc6336 | Alon Levy | return out;
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52 | cbcc6336 | Alon Levy | } |
53 | cbcc6336 | Alon Levy | |
54 | cbcc6336 | Alon Levy | static int vmc_read(SpiceCharDeviceInstance *sin, uint8_t *buf, int len) |
55 | cbcc6336 | Alon Levy | { |
56 | cbcc6336 | Alon Levy | SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin); |
57 | cbcc6336 | Alon Levy | int bytes = MIN(len, scd->datalen);
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58 | cbcc6336 | Alon Levy | |
59 | cbcc6336 | Alon Levy | dprintf(scd, 2, "%s: %p %d/%d/%zd\n", __func__, scd->datapos, len, bytes, scd->datalen); |
60 | cbcc6336 | Alon Levy | if (bytes > 0) { |
61 | cbcc6336 | Alon Levy | memcpy(buf, scd->datapos, bytes); |
62 | cbcc6336 | Alon Levy | scd->datapos += bytes; |
63 | cbcc6336 | Alon Levy | scd->datalen -= bytes; |
64 | cbcc6336 | Alon Levy | assert(scd->datalen >= 0);
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65 | cbcc6336 | Alon Levy | if (scd->datalen == 0) { |
66 | cbcc6336 | Alon Levy | scd->datapos = 0;
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67 | cbcc6336 | Alon Levy | } |
68 | cbcc6336 | Alon Levy | } |
69 | cbcc6336 | Alon Levy | trace_spice_vmc_read(bytes, len); |
70 | cbcc6336 | Alon Levy | return bytes;
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71 | cbcc6336 | Alon Levy | } |
72 | cbcc6336 | Alon Levy | |
73 | cbcc6336 | Alon Levy | static SpiceCharDeviceInterface vmc_interface = {
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74 | cbcc6336 | Alon Levy | .base.type = SPICE_INTERFACE_CHAR_DEVICE, |
75 | cbcc6336 | Alon Levy | .base.description = "spice virtual channel char device",
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76 | cbcc6336 | Alon Levy | .base.major_version = SPICE_INTERFACE_CHAR_DEVICE_MAJOR, |
77 | cbcc6336 | Alon Levy | .base.minor_version = SPICE_INTERFACE_CHAR_DEVICE_MINOR, |
78 | cbcc6336 | Alon Levy | .write = vmc_write, |
79 | cbcc6336 | Alon Levy | .read = vmc_read, |
80 | cbcc6336 | Alon Levy | }; |
81 | cbcc6336 | Alon Levy | |
82 | cbcc6336 | Alon Levy | |
83 | cbcc6336 | Alon Levy | static void vmc_register_interface(SpiceCharDriver *scd) |
84 | cbcc6336 | Alon Levy | { |
85 | cbcc6336 | Alon Levy | if (scd->active) {
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86 | cbcc6336 | Alon Levy | return;
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87 | cbcc6336 | Alon Levy | } |
88 | cbcc6336 | Alon Levy | dprintf(scd, 1, "%s\n", __func__); |
89 | cbcc6336 | Alon Levy | scd->sin.base.sif = &vmc_interface.base; |
90 | cbcc6336 | Alon Levy | qemu_spice_add_interface(&scd->sin.base); |
91 | cbcc6336 | Alon Levy | scd->active = true;
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92 | cbcc6336 | Alon Levy | trace_spice_vmc_register_interface(scd); |
93 | cbcc6336 | Alon Levy | } |
94 | cbcc6336 | Alon Levy | |
95 | cbcc6336 | Alon Levy | static void vmc_unregister_interface(SpiceCharDriver *scd) |
96 | cbcc6336 | Alon Levy | { |
97 | cbcc6336 | Alon Levy | if (!scd->active) {
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98 | cbcc6336 | Alon Levy | return;
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99 | cbcc6336 | Alon Levy | } |
100 | cbcc6336 | Alon Levy | dprintf(scd, 1, "%s\n", __func__); |
101 | cbcc6336 | Alon Levy | spice_server_remove_interface(&scd->sin.base); |
102 | cbcc6336 | Alon Levy | scd->active = false;
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103 | cbcc6336 | Alon Levy | trace_spice_vmc_unregister_interface(scd); |
104 | cbcc6336 | Alon Levy | } |
105 | cbcc6336 | Alon Levy | |
106 | cbcc6336 | Alon Levy | |
107 | cbcc6336 | Alon Levy | static int spice_chr_write(CharDriverState *chr, const uint8_t *buf, int len) |
108 | cbcc6336 | Alon Levy | { |
109 | cbcc6336 | Alon Levy | SpiceCharDriver *s = chr->opaque; |
110 | cbcc6336 | Alon Levy | |
111 | cbcc6336 | Alon Levy | dprintf(s, 2, "%s: %d\n", __func__, len); |
112 | cbcc6336 | Alon Levy | vmc_register_interface(s); |
113 | cbcc6336 | Alon Levy | assert(s->datalen == 0);
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114 | cbcc6336 | Alon Levy | if (s->bufsize < len) {
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115 | cbcc6336 | Alon Levy | s->bufsize = len; |
116 | cbcc6336 | Alon Levy | s->buffer = qemu_realloc(s->buffer, s->bufsize); |
117 | cbcc6336 | Alon Levy | } |
118 | cbcc6336 | Alon Levy | memcpy(s->buffer, buf, len); |
119 | cbcc6336 | Alon Levy | s->datapos = s->buffer; |
120 | cbcc6336 | Alon Levy | s->datalen = len; |
121 | cbcc6336 | Alon Levy | spice_server_char_device_wakeup(&s->sin); |
122 | cbcc6336 | Alon Levy | return len;
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123 | cbcc6336 | Alon Levy | } |
124 | cbcc6336 | Alon Levy | |
125 | cbcc6336 | Alon Levy | static void spice_chr_close(struct CharDriverState *chr) |
126 | cbcc6336 | Alon Levy | { |
127 | cbcc6336 | Alon Levy | SpiceCharDriver *s = chr->opaque; |
128 | cbcc6336 | Alon Levy | |
129 | cbcc6336 | Alon Levy | printf("%s\n", __func__);
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130 | cbcc6336 | Alon Levy | vmc_unregister_interface(s); |
131 | cbcc6336 | Alon Levy | qemu_free(s); |
132 | cbcc6336 | Alon Levy | } |
133 | cbcc6336 | Alon Levy | |
134 | cbcc6336 | Alon Levy | static void print_allowed_subtypes(void) |
135 | cbcc6336 | Alon Levy | { |
136 | cbcc6336 | Alon Levy | const char** psubtype; |
137 | cbcc6336 | Alon Levy | int i;
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138 | cbcc6336 | Alon Levy | |
139 | cbcc6336 | Alon Levy | fprintf(stderr, "allowed names: ");
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140 | cbcc6336 | Alon Levy | for(i=0, psubtype = spice_server_char_device_recognized_subtypes(); |
141 | cbcc6336 | Alon Levy | *psubtype != NULL; ++psubtype, ++i) {
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142 | cbcc6336 | Alon Levy | if (i == 0) { |
143 | cbcc6336 | Alon Levy | fprintf(stderr, "%s", *psubtype);
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144 | cbcc6336 | Alon Levy | } else {
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145 | cbcc6336 | Alon Levy | fprintf(stderr, ", %s", *psubtype);
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146 | cbcc6336 | Alon Levy | } |
147 | cbcc6336 | Alon Levy | } |
148 | cbcc6336 | Alon Levy | fprintf(stderr, "\n");
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149 | cbcc6336 | Alon Levy | } |
150 | cbcc6336 | Alon Levy | |
151 | cbcc6336 | Alon Levy | CharDriverState *qemu_chr_open_spice(QemuOpts *opts) |
152 | cbcc6336 | Alon Levy | { |
153 | cbcc6336 | Alon Levy | CharDriverState *chr; |
154 | cbcc6336 | Alon Levy | SpiceCharDriver *s; |
155 | cbcc6336 | Alon Levy | const char* name = qemu_opt_get(opts, "name"); |
156 | cbcc6336 | Alon Levy | uint32_t debug = qemu_opt_get_number(opts, "debug", 0); |
157 | cbcc6336 | Alon Levy | const char** psubtype = spice_server_char_device_recognized_subtypes(); |
158 | cbcc6336 | Alon Levy | const char *subtype = NULL; |
159 | cbcc6336 | Alon Levy | |
160 | cbcc6336 | Alon Levy | if (name == NULL) { |
161 | cbcc6336 | Alon Levy | fprintf(stderr, "spice-qemu-char: missing name parameter\n");
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162 | cbcc6336 | Alon Levy | print_allowed_subtypes(); |
163 | cbcc6336 | Alon Levy | return NULL; |
164 | cbcc6336 | Alon Levy | } |
165 | cbcc6336 | Alon Levy | for(;*psubtype != NULL; ++psubtype) { |
166 | cbcc6336 | Alon Levy | if (strcmp(name, *psubtype) == 0) { |
167 | cbcc6336 | Alon Levy | subtype = *psubtype; |
168 | cbcc6336 | Alon Levy | break;
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169 | cbcc6336 | Alon Levy | } |
170 | cbcc6336 | Alon Levy | } |
171 | cbcc6336 | Alon Levy | if (subtype == NULL) { |
172 | cbcc6336 | Alon Levy | fprintf(stderr, "spice-qemu-char: unsupported name\n");
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173 | cbcc6336 | Alon Levy | print_allowed_subtypes(); |
174 | cbcc6336 | Alon Levy | return NULL; |
175 | cbcc6336 | Alon Levy | } |
176 | cbcc6336 | Alon Levy | |
177 | cbcc6336 | Alon Levy | chr = qemu_mallocz(sizeof(CharDriverState));
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178 | cbcc6336 | Alon Levy | s = qemu_mallocz(sizeof(SpiceCharDriver));
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179 | cbcc6336 | Alon Levy | s->chr = chr; |
180 | cbcc6336 | Alon Levy | s->debug = debug; |
181 | cbcc6336 | Alon Levy | s->active = false;
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182 | cbcc6336 | Alon Levy | s->sin.subtype = subtype; |
183 | cbcc6336 | Alon Levy | chr->opaque = s; |
184 | cbcc6336 | Alon Levy | chr->chr_write = spice_chr_write; |
185 | cbcc6336 | Alon Levy | chr->chr_close = spice_chr_close; |
186 | cbcc6336 | Alon Levy | |
187 | cbcc6336 | Alon Levy | qemu_chr_generic_open(chr); |
188 | cbcc6336 | Alon Levy | |
189 | cbcc6336 | Alon Levy | return chr;
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190 | cbcc6336 | Alon Levy | } |