| 71 |
71 |
return copied;
|
| 72 |
72 |
}
|
| 73 |
73 |
|
|
74 |
static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size)
|
|
75 |
{
|
|
76 |
return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num,
|
|
77 |
offset, size, 0);
|
|
78 |
}
|
|
79 |
|
|
80 |
static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src,
|
|
81 |
size_t size)
|
|
82 |
{
|
|
83 |
return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num,
|
|
84 |
offset, size, 1);
|
|
85 |
}
|
|
86 |
|
|
87 |
static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg)
|
|
88 |
{
|
|
89 |
size_t pos = 0;
|
|
90 |
int i, j;
|
|
91 |
struct iovec *src_sg;
|
|
92 |
unsigned int num;
|
|
93 |
|
|
94 |
if (rx) {
|
|
95 |
src_sg = pdu->elem.in_sg;
|
|
96 |
num = pdu->elem.in_num;
|
|
97 |
} else {
|
|
98 |
src_sg = pdu->elem.out_sg;
|
|
99 |
num = pdu->elem.out_num;
|
|
100 |
}
|
|
101 |
|
|
102 |
j = 0;
|
|
103 |
for (i = 0; i < num; i++) {
|
|
104 |
if (offset <= pos) {
|
|
105 |
sg[j].iov_base = src_sg[i].iov_base;
|
|
106 |
sg[j].iov_len = src_sg[i].iov_len;
|
|
107 |
j++;
|
|
108 |
} else if (offset < (src_sg[i].iov_len + pos)) {
|
|
109 |
sg[j].iov_base = src_sg[i].iov_base;
|
|
110 |
sg[j].iov_len = src_sg[i].iov_len;
|
|
111 |
sg[j].iov_base += (offset - pos);
|
|
112 |
sg[j].iov_len -= (offset - pos);
|
|
113 |
j++;
|
|
114 |
}
|
|
115 |
pos += src_sg[i].iov_len;
|
|
116 |
}
|
|
117 |
|
|
118 |
return j;
|
|
119 |
}
|
|
120 |
|
|
121 |
static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...)
|
|
122 |
{
|
|
123 |
size_t old_offset = offset;
|
|
124 |
va_list ap;
|
|
125 |
int i;
|
|
126 |
|
|
127 |
va_start(ap, fmt);
|
|
128 |
for (i = 0; fmt[i]; i++) {
|
|
129 |
switch (fmt[i]) {
|
|
130 |
case 'b': {
|
|
131 |
uint8_t *valp = va_arg(ap, uint8_t *);
|
|
132 |
offset += pdu_unpack(valp, pdu, offset, sizeof(*valp));
|
|
133 |
break;
|
|
134 |
}
|
|
135 |
case 'w': {
|
|
136 |
uint16_t val, *valp;
|
|
137 |
valp = va_arg(ap, uint16_t *);
|
|
138 |
val = le16_to_cpupu(valp);
|
|
139 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
|
140 |
*valp = val;
|
|
141 |
break;
|
|
142 |
}
|
|
143 |
case 'd': {
|
|
144 |
uint32_t val, *valp;
|
|
145 |
valp = va_arg(ap, uint32_t *);
|
|
146 |
val = le32_to_cpupu(valp);
|
|
147 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
|
148 |
*valp = val;
|
|
149 |
break;
|
|
150 |
}
|
|
151 |
case 'q': {
|
|
152 |
uint64_t val, *valp;
|
|
153 |
valp = va_arg(ap, uint64_t *);
|
|
154 |
val = le64_to_cpup(valp);
|
|
155 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
|
156 |
*valp = val;
|
|
157 |
break;
|
|
158 |
}
|
|
159 |
case 'v': {
|
|
160 |
struct iovec *iov = va_arg(ap, struct iovec *);
|
|
161 |
int *iovcnt = va_arg(ap, int *);
|
|
162 |
*iovcnt = pdu_copy_sg(pdu, offset, 0, iov);
|
|
163 |
break;
|
|
164 |
}
|
|
165 |
case 's': {
|
|
166 |
V9fsString *str = va_arg(ap, V9fsString *);
|
|
167 |
offset += pdu_unmarshal(pdu, offset, "w", &str->size);
|
|
168 |
/* FIXME: sanity check str->size */
|
|
169 |
str->data = qemu_malloc(str->size + 1);
|
|
170 |
offset += pdu_unpack(str->data, pdu, offset, str->size);
|
|
171 |
str->data[str->size] = 0;
|
|
172 |
break;
|
|
173 |
}
|
|
174 |
case 'Q': {
|
|
175 |
V9fsQID *qidp = va_arg(ap, V9fsQID *);
|
|
176 |
offset += pdu_unmarshal(pdu, offset, "bdq",
|
|
177 |
&qidp->type, &qidp->version, &qidp->path);
|
|
178 |
break;
|
|
179 |
}
|
|
180 |
case 'S': {
|
|
181 |
V9fsStat *statp = va_arg(ap, V9fsStat *);
|
|
182 |
offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd",
|
|
183 |
&statp->size, &statp->type, &statp->dev,
|
|
184 |
&statp->qid, &statp->mode, &statp->atime,
|
|
185 |
&statp->mtime, &statp->length,
|
|
186 |
&statp->name, &statp->uid, &statp->gid,
|
|
187 |
&statp->muid, &statp->extension,
|
|
188 |
&statp->n_uid, &statp->n_gid,
|
|
189 |
&statp->n_muid);
|
|
190 |
break;
|
|
191 |
}
|
|
192 |
default:
|
|
193 |
break;
|
|
194 |
}
|
|
195 |
}
|
|
196 |
|
|
197 |
va_end(ap);
|
|
198 |
|
|
199 |
return offset - old_offset;
|
|
200 |
}
|
|
201 |
|
|
202 |
static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...)
|
|
203 |
{
|
|
204 |
size_t old_offset = offset;
|
|
205 |
va_list ap;
|
|
206 |
int i;
|
|
207 |
|
|
208 |
va_start(ap, fmt);
|
|
209 |
for (i = 0; fmt[i]; i++) {
|
|
210 |
switch (fmt[i]) {
|
|
211 |
case 'b': {
|
|
212 |
uint8_t val = va_arg(ap, int);
|
|
213 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
|
214 |
break;
|
|
215 |
}
|
|
216 |
case 'w': {
|
|
217 |
uint16_t val;
|
|
218 |
cpu_to_le16w(&val, va_arg(ap, int));
|
|
219 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
|
220 |
break;
|
|
221 |
}
|
|
222 |
case 'd': {
|
|
223 |
uint32_t val;
|
|
224 |
cpu_to_le32w(&val, va_arg(ap, uint32_t));
|
|
225 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
|
226 |
break;
|
|
227 |
}
|
|
228 |
case 'q': {
|
|
229 |
uint64_t val;
|
|
230 |
cpu_to_le64w(&val, va_arg(ap, uint64_t));
|
|
231 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
|
232 |
break;
|
|
233 |
}
|
|
234 |
case 'v': {
|
|
235 |
struct iovec *iov = va_arg(ap, struct iovec *);
|
|
236 |
int *iovcnt = va_arg(ap, int *);
|
|
237 |
*iovcnt = pdu_copy_sg(pdu, offset, 1, iov);
|
|
238 |
break;
|
|
239 |
}
|
|
240 |
case 's': {
|
|
241 |
V9fsString *str = va_arg(ap, V9fsString *);
|
|
242 |
offset += pdu_marshal(pdu, offset, "w", str->size);
|
|
243 |
offset += pdu_pack(pdu, offset, str->data, str->size);
|
|
244 |
break;
|
|
245 |
}
|
|
246 |
case 'Q': {
|
|
247 |
V9fsQID *qidp = va_arg(ap, V9fsQID *);
|
|
248 |
offset += pdu_marshal(pdu, offset, "bdq",
|
|
249 |
qidp->type, qidp->version, qidp->path);
|
|
250 |
break;
|
|
251 |
}
|
|
252 |
case 'S': {
|
|
253 |
V9fsStat *statp = va_arg(ap, V9fsStat *);
|
|
254 |
offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd",
|
|
255 |
statp->size, statp->type, statp->dev,
|
|
256 |
&statp->qid, statp->mode, statp->atime,
|
|
257 |
statp->mtime, statp->length, &statp->name,
|
|
258 |
&statp->uid, &statp->gid, &statp->muid,
|
|
259 |
&statp->extension, statp->n_uid,
|
|
260 |
statp->n_gid, statp->n_muid);
|
|
261 |
break;
|
|
262 |
}
|
|
263 |
default:
|
|
264 |
break;
|
|
265 |
}
|
|
266 |
}
|
|
267 |
va_end(ap);
|
|
268 |
|
|
269 |
return offset - old_offset;
|
|
270 |
}
|
|
271 |
|
|
272 |
static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len)
|
|
273 |
{
|
|
274 |
int8_t id = pdu->id + 1; /* Response */
|
|
275 |
|
|
276 |
if (len < 0) {
|
|
277 |
V9fsString str;
|
|
278 |
int err = -len;
|
|
279 |
|
|
280 |
str.data = strerror(err);
|
|
281 |
str.size = strlen(str.data);
|
|
282 |
|
|
283 |
len = 7;
|
|
284 |
len += pdu_marshal(pdu, len, "s", &str);
|
|
285 |
if (dotu) {
|
|
286 |
len += pdu_marshal(pdu, len, "d", err);
|
|
287 |
}
|
|
288 |
|
|
289 |
id = P9_RERROR;
|
|
290 |
}
|
|
291 |
|
|
292 |
/* fill out the header */
|
|
293 |
pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag);
|
|
294 |
|
|
295 |
/* keep these in sync */
|
|
296 |
pdu->size = len;
|
|
297 |
pdu->id = id;
|
|
298 |
|
|
299 |
/* push onto queue and notify */
|
|
300 |
virtqueue_push(s->vq, &pdu->elem, len);
|
|
301 |
|
|
302 |
/* FIXME: we should batch these completions */
|
|
303 |
virtio_notify(&s->vdev, s->vq);
|
|
304 |
|
|
305 |
free_pdu(s, pdu);
|
|
306 |
}
|
|
307 |
|
|
308 |
static void v9fs_dummy(V9fsState *s, V9fsPDU *pdu)
|
|
309 |
{
|
|
310 |
/* Note: The following have been added to prevent GCC from complaining
|
|
311 |
* They will be removed in the subsequent patches */
|
|
312 |
(void)pdu_unmarshal;
|
|
313 |
(void) complete_pdu;
|
|
314 |
|
|
315 |
}
|
| 74 |
316 |
static void v9fs_version(V9fsState *s, V9fsPDU *pdu)
|
| 75 |
317 |
{
|
| 76 |
318 |
if (debug_9p_pdu) {
|
| ... | ... | |
| 135 |
377 |
|
| 136 |
378 |
static void v9fs_flush(V9fsState *s, V9fsPDU *pdu)
|
| 137 |
379 |
{
|
|
380 |
v9fs_dummy(s, pdu);
|
| 138 |
381 |
if (debug_9p_pdu) {
|
| 139 |
382 |
pprint_pdu(pdu);
|
| 140 |
383 |
}
|