Revision db89119d block/qcow2.c
| b/block/qcow2.c | ||
|---|---|---|
| 844 | 844 |
uint64_t tmp, offset; |
| 845 | 845 |
QCowCreateState s1, *s = &s1; |
| 846 | 846 |
QCowExtension ext_bf = {0, 0};
|
| 847 |
|
|
| 847 |
int ret; |
|
| 848 | 848 |
|
| 849 | 849 |
memset(s, 0, sizeof(*s)); |
| 850 | 850 |
|
| ... | ... | |
| 927 | 927 |
ref_clusters * s->cluster_size); |
| 928 | 928 |
|
| 929 | 929 |
/* write all the data */ |
| 930 |
write(fd, &header, sizeof(header)); |
|
| 930 |
ret = qemu_write_full(fd, &header, sizeof(header)); |
|
| 931 |
if (ret != sizeof(header)) {
|
|
| 932 |
ret = -1; |
|
| 933 |
goto exit; |
|
| 934 |
} |
|
| 931 | 935 |
if (backing_file) {
|
| 932 | 936 |
if (backing_format_len) {
|
| 933 | 937 |
char zero[16]; |
| ... | ... | |
| 936 | 940 |
memset(zero, 0, sizeof(zero)); |
| 937 | 941 |
cpu_to_be32s(&ext_bf.magic); |
| 938 | 942 |
cpu_to_be32s(&ext_bf.len); |
| 939 |
write(fd, &ext_bf, sizeof(ext_bf)); |
|
| 940 |
write(fd, backing_format, backing_format_len); |
|
| 943 |
ret = qemu_write_full(fd, &ext_bf, sizeof(ext_bf)); |
|
| 944 |
if (ret != sizeof(ext_bf)) {
|
|
| 945 |
ret = -1; |
|
| 946 |
goto exit; |
|
| 947 |
} |
|
| 948 |
ret = qemu_write_full(fd, backing_format, backing_format_len); |
|
| 949 |
if (ret != backing_format_len) {
|
|
| 950 |
ret = -1; |
|
| 951 |
goto exit; |
|
| 952 |
} |
|
| 941 | 953 |
if (padding > 0) {
|
| 942 |
write(fd, zero, padding); |
|
| 954 |
ret = qemu_write_full(fd, zero, padding); |
|
| 955 |
if (ret != padding) {
|
|
| 956 |
ret = -1; |
|
| 957 |
goto exit; |
|
| 958 |
} |
|
| 943 | 959 |
} |
| 944 | 960 |
} |
| 945 |
write(fd, backing_file, backing_filename_len); |
|
| 961 |
ret = qemu_write_full(fd, backing_file, backing_filename_len); |
|
| 962 |
if (ret != backing_filename_len) {
|
|
| 963 |
ret = -1; |
|
| 964 |
goto exit; |
|
| 965 |
} |
|
| 946 | 966 |
} |
| 947 | 967 |
lseek(fd, s->l1_table_offset, SEEK_SET); |
| 948 | 968 |
tmp = 0; |
| 949 | 969 |
for(i = 0;i < l1_size; i++) {
|
| 950 |
write(fd, &tmp, sizeof(tmp)); |
|
| 970 |
ret = qemu_write_full(fd, &tmp, sizeof(tmp)); |
|
| 971 |
if (ret != sizeof(tmp)) {
|
|
| 972 |
ret = -1; |
|
| 973 |
goto exit; |
|
| 974 |
} |
|
| 951 | 975 |
} |
| 952 | 976 |
lseek(fd, s->refcount_table_offset, SEEK_SET); |
| 953 |
write(fd, s->refcount_table, s->cluster_size); |
|
| 977 |
ret = qemu_write_full(fd, s->refcount_table, s->cluster_size); |
|
| 978 |
if (ret != s->cluster_size) {
|
|
| 979 |
ret = -1; |
|
| 980 |
goto exit; |
|
| 981 |
} |
|
| 954 | 982 |
|
| 955 | 983 |
lseek(fd, s->refcount_block_offset, SEEK_SET); |
| 956 |
write(fd, s->refcount_block, ref_clusters * s->cluster_size); |
|
| 984 |
ret = qemu_write_full(fd, s->refcount_block, |
|
| 985 |
ref_clusters * s->cluster_size); |
|
| 986 |
if (ret != s->cluster_size) {
|
|
| 987 |
ret = -1; |
|
| 988 |
goto exit; |
|
| 989 |
} |
|
| 957 | 990 |
|
| 991 |
ret = 0; |
|
| 992 |
exit: |
|
| 958 | 993 |
qemu_free(s->refcount_table); |
| 959 | 994 |
qemu_free(s->refcount_block); |
| 960 | 995 |
close(fd); |
| ... | ... | |
| 968 | 1003 |
bdrv_close(bs); |
| 969 | 1004 |
} |
| 970 | 1005 |
|
| 971 |
return 0;
|
|
| 1006 |
return ret;
|
|
| 972 | 1007 |
} |
| 973 | 1008 |
|
| 974 | 1009 |
static int qcow_create(const char *filename, QEMUOptionParameter *options) |
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