// Sets 'blockpos' to point to the next block segment for the inode (and moves onto the
// next block descriptor inode if necessary)
int pfsBlockSeekNextSegment(pfs_cache_t *clink, pfs_blockpos_t *blockpos)
{
pfs_cache_t *nextSegment;
int result=0;
if (blockpos->byte_offset)
{
PFS_PRINTF(PFS_DRV_NAME": Panic: This is a bug!\n");
return -1;
}
// If we're at the end of the block descriptor array for the current
// inode, then move onto the next inode
if (pfsFixIndex(blockpos->block_segment+1)==0)
{
if ((nextSegment=pfsBlockGetNextSegment(pfsCacheUsedAdd(blockpos->inode), &result)) == NULL)
return result;
pfsCacheFree(blockpos->inode);
blockpos->inode=nextSegment;
if (clink->u.inode->number_data-1 == ++blockpos->block_segment)
return -EINVAL;
}
blockpos->block_offset=0;
blockpos->block_segment++;
return result;
}
int pfsInodeSync(pfs_blockpos_t *blockpos, u64 size, u32 used_segments)
{
int result=0;
u32 i;
u16 count;
for(i=pfsBlockSyncPos(blockpos, size); i; )
{
count=blockpos->inode->u.inode->data[pfsFixIndex(blockpos->block_segment)].count;
i+=blockpos->block_offset;
if (i < count){
blockpos->block_offset=i;
break;
}
i-=count;
if (blockpos->block_segment + 1 == used_segments)
{
blockpos->block_offset=count;
if (i || blockpos->byte_offset){
PFS_PRINTF(PFS_DRV_NAME": panic: fp exceeds file.\n");
return -EINVAL;
}
}else{
blockpos->block_offset=0;
blockpos->block_segment++;
}
if (pfsFixIndex(blockpos->block_segment))
continue;
if ((blockpos->inode = pfsBlockGetNextSegment(blockpos->inode, &result)) == 0)
break;
i++;
}
return result;
}