// Sets 'blockpos' to point to the next block segment for the inode (and moves onto the // next block descriptor inode if necessary) int blockSeekNextSegment(pfs_cache_t *clink, pfs_blockpos_t *blockpos) { pfs_cache_t *nextSegment; int result=0; if (blockpos->byte_offset) { printf("ps2fs: 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 (fixIndex(blockpos->block_segment+1)==0) { if ((nextSegment=blockGetNextSegment(cacheUsedAdd(blockpos->inode), &result)) == NULL) return result; cacheAdd(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; }
void ioctl2Free(pfs_cache_t *pfree) { pfs_blockinfo b; int result; pfs_mount_t *pfsMount = pfree->pfsMount; pfs_inode *inode = pfree->u.inode; u32 nextsegdesc = 1, limit = inode->number_data, i, j = 0, zones; pfs_blockinfo *bi; pfs_cache_t *clink; zones = inode->size / pfsMount->zsize; if(inode->size % pfsMount->zsize) zones++; if(inode->number_segdesg + zones == inode->number_blocks) return; j = zones; b.number = 0; clink = cacheUsedAdd(pfree); // iterate through each of the block segments used by the inode for (i = 1; i < limit && j; i++) { if(fixIndex(i) == 0) { if ((clink = blockGetNextSegment(clink, &result)) == 0) return; nextsegdesc++; } else if(j < clink->u.inode->data[fixIndex(i)].count) { clink->u.inode->data[fixIndex(i)].count -= j; b.subpart = clink->u.inode->data[fixIndex(i)].subpart; b.count = j; b.number = clink->u.inode->data[fixIndex(i)].number + clink->u.inode->data[fixIndex(i)].count; j = 0; clink->flags |= CACHE_FLAG_DIRTY; } else j -= clink->u.inode->data[fixIndex(i)].count; } pfree->u.inode->number_data = i; pfree->u.inode->number_blocks = zones + nextsegdesc; pfree->u.inode->number_segdesg = nextsegdesc; pfree->u.inode->last_segment.number = clink->u.inode->data[0].number; pfree->u.inode->last_segment.subpart= clink->u.inode->data[0].subpart; pfree->u.inode->last_segment.count = clink->u.inode->data[0].count; pfree->flags |= CACHE_FLAG_DIRTY; if (b.number) bitmapFreeBlockSegment(pfsMount, &b); while(i < limit) { if (fixIndex(i) == 0) { if((clink = blockGetNextSegment(clink, &result)) == 0) return; } bi = &clink->u.inode->data[fixIndex(i++)]; bitmapFreeBlockSegment(pfsMount, bi); cacheMarkClean(pfsMount, bi->subpart, bi->number<<pfsMount->inode_scale, (bi->number+bi->count)<<pfsMount->inode_scale); } cacheAdd(clink); }