Hello folks,
I'm using the code below to retrieve configuration data for my vDPA file
via ioctl. I get as output:
Configuration data (24 bytes):
5a c3 5f 68 48 a9 01 00 08 00 dc 05 00 00 00 00
00 00 00 00 00 00 00 00
ASCII representation:
Z._hH...................
Could a good Samaritan point me in the right direction for the docs I need
to understand these values and convert them to a human-readable format?
hank you in advance!
Regards,
Carlos
---
void check_config(int fd) {
uint32_t size;
struct vhost_vdpa_config *config;
uint8_t *buf;
if (ioctl(fd, VHOST_VDPA_GET_CONFIG_SIZE, &size) < 0) {
perror("ioctl failed");
return;
}
config = malloc(sizeof(struct vhost_vdpa_config) + size);
if (!config) {
perror("malloc failed");
return;
}
memset(config, 0, sizeof(struct vhost_vdpa_config) + size);
config->len = size;
config->off = 0;
buf = config->buf;
if (ioctl(fd, VHOST_VDPA_GET_CONFIG, config) < 0) {
perror("ioctl failed");
} else {
printf("Configuration data (%u bytes):\n", size);
/* Print the data in a human-readable format */
for (unsigned int i = 0; i < size; i++) {
if (i % 16 == 0 && i != 0) printf("\n");
printf("%02x ", buf[i]);
}
printf("\n");
printf("ASCII representation:\n");
for (unsigned int i = 0; i < size; i++) {
if (buf[i] >= 32 && buf[i] <= 126) {
printf("%c", buf[i]);
} else {
printf(".");
}
}
printf("\n");
}
free(config);
}
