| 315,6 → 315,57 |
|---|
| ipc_answer_1(rid, EOK, bytes); |
| } |
| |
| void tmpfs_write(ipc_callid_t rid, ipc_call_t *request) |
| { |
| int dev_handle = IPC_GET_ARG1(*request); |
| unsigned long index = IPC_GET_ARG2(*request); |
| off_t pos = IPC_GET_ARG3(*request); |
| |
| /* |
| * Lookup the respective dentry. |
| */ |
| link_t *hlp; |
| hlp = hash_table_find(&dentries, &index); |
| if (!hlp) { |
| ipc_answer_0(rid, ENOENT); |
| return; |
| } |
| tmpfs_dentry_t *dentry = hash_table_get_instance(hlp, tmpfs_dentry_t, |
| dh_link); |
| |
| /* |
| * Receive the write request. |
| */ |
| ipc_callid_t callid; |
| size_t size; |
| if (!ipc_data_write_receive(&callid, NULL, &size)) { |
| ipc_answer_0(callid, EINVAL); |
| ipc_answer_0(rid, EINVAL); |
| return; |
| } |
| |
| /* |
| * At this point, we are deliberately extremely straightforward and |
| * simply realloc the contents of the file on every write. In the end, |
| * the situation might not be as bad as it may look: our heap allocator |
| * can save us and just grow the block whenever possible. |
| */ |
| void *newdata = realloc(dentry->data, size); |
| if (!newdata) { |
| ipc_answer_0(callid, ENOMEM); |
| ipc_answer_1(rid, EOK, 0); |
| return; |
| } |
| dentry->size = size; |
| dentry->data = newdata; |
| (void) ipc_data_write_deliver(callid, dentry->data + pos, size); |
| |
| /* |
| * Answer the VFS_WRITE call. |
| */ |
| ipc_answer_1(rid, EOK, size); |
| } |
| |
| /** |
| * @} |
| */ |