| 849,11 → 849,23 |
|---|
| ipc_answer_1(rid, EOK, (ipcarg_t)bytes); |
| } |
| |
| static void fat_fill_gap(fat_node_t *nodep, off_t start, off_t stop) |
| static void |
| fat_fill_gap(fat_node_t *nodep, fat_cluster_t mclst, off_t pos) |
| { |
| /* TODO */ |
| } |
| |
| static int |
| fat_alloc_clusters(unsigned nclsts, fat_cluster_t *mcl, fat_cluster_t *lcl) |
| { |
| return ENOTSUP; /* TODO */ |
| } |
| |
| static void |
| fat_append_clusters(fat_node_t *nodep, fat_cluster_t mcl) |
| { |
| } |
| |
| void fat_write(ipc_callid_t rid, ipc_call_t *request) |
| { |
| dev_handle_t dev_handle = (dev_handle_t)IPC_GET_ARG1(*request); |
| 909,17 → 921,16 |
|---|
| * the limits of the last cluster. The node size may grow to the |
| * next block size boundary. |
| */ |
| if (pos > nodep->size) |
| fat_fill_gap(nodep, nodep->size, pos); |
| fat_fill_gap(nodep, FAT_CLST_RES0, pos); |
| b = fat_block_get(nodep, pos / bps); |
| (void) ipc_data_write_finalize(callid, b->data + pos % bps, |
| bytes); |
| b->dirty = true; /* need to sync block */ |
| block_put(b); |
| if (pos + bytes > nodep->size) { |
| nodep->size = pos + bytes; |
| nodep->dirty = true; /* need to sync node */ |
| } |
| block_put(b); |
| fat_node_put(nodep); |
| ipc_answer_1(rid, EOK, bytes); |
| return; |
| 928,13 → 939,39 |
|---|
| * This is the more difficult case. We must allocate new |
| * clusters for the node and zero them out. |
| */ |
| int status; |
| unsigned nclsts; |
| |
| fat_cluster_t mcl, lcl; |
| |
| nclsts = (ROUND_UP(pos + bytes, bps * spc) - clst_boundary) / |
| bps * spc; |
| |
| bps * spc; |
| /* create an independent chain of nclsts clusters in all FATs */ |
| status = fat_alloc_clusters(nclsts, &mcl, &lcl); |
| if (status != EOK) { |
| /* could not allocate a chain of nclsts clusters */ |
| fat_node_put(nodep); |
| ipc_answer_0(callid, status); |
| ipc_answer_0(rid, status); |
| return; |
| } |
| /* zero fill any gaps */ |
| fat_fill_gap(nodep, mcl, pos); |
| b = _fat_block_get(dev_handle, lcl, (pos / bps) % spc); |
| (void) ipc_data_write_finalize(callid, b->data + pos % bps, |
| bytes); |
| b->dirty = true; |
| block_put(b); |
| /* |
| * Append the cluster chain starting in mcl to the end of the |
| * node's cluster chain. |
| */ |
| fat_append_clusters(nodep, mcl); |
| nodep->size = pos + bytes; |
| nodep->dirty = true; |
| fat_node_put(nodep); |
| ipc_answer_1(rid, EOK, bytes); |
| return; |
| } |
| |
| } |
| |
| /** |