//allocates a free block number
int balloc(int dev)
{
int i;
char buf[BLKSIZE];
//read block_map block
get_block(dev, bmap, buf);
for(i = 0; i < nblocks; i++)
{
if(tst_bit(buf, i) == 0)
{
set_bit(buf, i);
decFreeInodes(dev);
put_block(dev, bmap, buf);
return i + 1;
}
}
printf("ERROR: no more free blocks\n");
return 0;
}
int ialloc(int fd) {
fputs("ialloc: ##################################################", stdout);
char buf[BLOCK_SIZE];
_get_block(fd, 1, buf);
Super * super = (Super *) buf;
int ninodes = (int) super->s_inodes_count;
printf("ninodes = %d\n", ninodes);
_get_block(fd, 2, buf);
GroupDesc * gp = (GroupDesc *) buf;
int imap = (int) gp->bg_inode_bitmap;
printf("imap = %d\n", imap);
// read inode_bitmap block
_get_block(fd, imap, buf);
for (int i = 0; i < ninodes; i++) {
if (tst_bit(buf, i) == 0) {
set_bit(buf, i);
decFreeInodes(fd);
put_block(fd, imap, buf);
return i + 1;
}
}
printf("ialloc(): no more free inodes\n");
return 0;
}
