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restore rw support for vvfat

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(Carlo Marcelo Arenas)


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4080 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aurel32 2008-03-18 06:52:48 +00:00
parent 4bf27c24bf
commit 7852e5da32
1 changed files with 9 additions and 5 deletions
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14
block-qcow.c
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@ -752,11 +752,15 @@ static int qcow_create(const char *filename, int64_t total_size,
header_size = sizeof(header);
backing_filename_len = 0;
if (backing_file) {
header.backing_file_offset = cpu_to_be64(header_size);
backing_filename_len = strlen(backing_file);
header.backing_file_size = cpu_to_be32(backing_filename_len);
header_size += backing_filename_len;
header.mtime = cpu_to_be32(0);
if (strcmp(backing_file, "fat:")) {
header.backing_file_offset = cpu_to_be64(header_size);
backing_filename_len = strlen(backing_file);
header.backing_file_size = cpu_to_be32(backing_filename_len);
header_size += backing_filename_len;
} else {
/* special backing file for vvfat */
backing_file = NULL;
}
header.cluster_bits = 9; /* 512 byte cluster to avoid copying
unmodifyed sectors */
header.l2_bits = 12; /* 32 KB L2 tables */