Revision 31f38120
| b/block/cow.c | ||
|---|---|---|
| 209 | 209 |
struct stat st; |
| 210 | 210 |
int64_t image_sectors = 0; |
| 211 | 211 |
const char *image_filename = NULL; |
| 212 |
int ret; |
|
| 212 | 213 |
|
| 213 | 214 |
/* Read out options */ |
| 214 | 215 |
while (options && options->name) {
|
| ... | ... | |
| 248 | 249 |
} |
| 249 | 250 |
cow_header.sectorsize = cpu_to_be32(512); |
| 250 | 251 |
cow_header.size = cpu_to_be64(image_sectors * 512); |
| 251 |
write(cow_fd, &cow_header, sizeof(cow_header)); |
|
| 252 |
ret = qemu_write_full(cow_fd, &cow_header, sizeof(cow_header)); |
|
| 253 |
if (ret != sizeof(cow_header)) {
|
|
| 254 |
ret = -1; |
|
| 255 |
goto exit; |
|
| 256 |
} |
|
| 257 |
|
|
| 252 | 258 |
/* resize to include at least all the bitmap */ |
| 253 |
ftruncate(cow_fd, sizeof(cow_header) + ((image_sectors + 7) >> 3)); |
|
| 259 |
ret = ftruncate(cow_fd, sizeof(cow_header) + ((image_sectors + 7) >> 3)); |
|
| 260 |
if (ret) {
|
|
| 261 |
ret = -errno; |
|
| 262 |
goto exit; |
|
| 263 |
} |
|
| 264 |
|
|
| 265 |
ret = 0; |
|
| 266 |
exit: |
|
| 254 | 267 |
close(cow_fd); |
| 255 |
return 0;
|
|
| 268 |
return ret;
|
|
| 256 | 269 |
} |
| 257 | 270 |
|
| 258 | 271 |
static void cow_flush(BlockDriverState *bs) |
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