/** Handle data requests.
*
* @param fun ddf_fun_t function.
* @param id callid
* @param call IPC request.
*
*/
void default_handler(ddf_fun_t *fun, ipc_callid_t id, ipc_call_t *call)
{
const sysarg_t method = IPC_GET_IMETHOD(*call);
const size_t size = IPC_GET_ARG1(*call);
switch (method) {
case IPC_CHAR_READ:
if (size <= 4 * sizeof(sysarg_t)) {
sysarg_t message[4] = {};
i8042_read(fun, (char *) message, size);
async_answer_4(id, size, message[0], message[1],
message[2], message[3]);
} else
async_answer_0(id, ELIMIT);
break;
case IPC_CHAR_WRITE:
if (size <= 3 * sizeof(sysarg_t)) {
const sysarg_t message[3] = {
IPC_GET_ARG2(*call),
IPC_GET_ARG3(*call),
IPC_GET_ARG4(*call)
};
i8042_write(fun, (char *) message, size);
async_answer_0(id, size);
} else
async_answer_0(id, ELIMIT);
default:
async_answer_0(id, EINVAL);
}
}
static void notification_received(ipc_callid_t callid, ipc_call_t *call)
{
switch (IPC_GET_IMETHOD(*call)) {
case VFS_TASK_STATE_CHANGE:
if (IPC_GET_ARG1(*call) == VFS_PASS_HANDLE)
vfs_pass_handle(
(task_id_t) MERGE_LOUP32(IPC_GET_ARG4(*call),
IPC_GET_ARG5(*call)), call->in_task_id,
(int) IPC_GET_ARG2(*call));
break;
default:
break;
}
}
/** Forward a received call to another destination - slow version.
*
* This function is the slow verision of the sys_ipc_forward_fast interface.
* It can copy all five new arguments and the new interface and method from
* the userspace. It naturally extends the functionality of the fast version.
* For system methods, it additionally stores the new value of arg3 to ARG4.
* For non-system methods, it additionally stores the new value of arg3, arg4
* and arg5, respectively, to ARG3, ARG4 and ARG5, respectively.
*
* @param callid Hash of the call to forward.
* @param phoneid Phone handle to use for forwarding.
* @param data Userspace address of the new IPC data.
* @param mode Flags that specify mode of the forward operation.
*
* @return 0 on succes, otherwise an error code.
*
*/
sysarg_t sys_ipc_forward_slow(sysarg_t callid, sysarg_t phoneid,
ipc_data_t *data, unsigned int mode)
{
ipc_data_t newdata;
int rc = copy_from_uspace(&newdata.args, &data->args,
sizeof(newdata.args));
if (rc != 0)
return (sysarg_t) rc;
return sys_ipc_forward_common(callid, phoneid,
IPC_GET_IMETHOD(newdata), IPC_GET_ARG1(newdata),
IPC_GET_ARG2(newdata), IPC_GET_ARG3(newdata),
IPC_GET_ARG4(newdata), IPC_GET_ARG5(newdata), mode, true);
}
#ifdef __32_BITS__
printf("%10p ", call);
#endif
#ifdef __64_BITS__
printf("%18p ", call);
#endif
spinlock_lock(&call->forget_lock);
printf("%-8" PRIun " %-6" PRIun " %-6" PRIun " %-6" PRIun
" %-6" PRIun " %-6" PRIun " %-7x",
IPC_GET_IMETHOD(call->data), IPC_GET_ARG1(call->data),
IPC_GET_ARG2(call->data), IPC_GET_ARG3(call->data),
IPC_GET_ARG4(call->data), IPC_GET_ARG5(call->data),
call->flags);
if (call->forget) {
printf(" ? (call forgotten)\n");
} else {
printf(" %" PRIu64 " (%s)\n",
call->sender->taskid, call->sender->name);
}
spinlock_unlock(&call->forget_lock);
}
}
/** List answerbox contents.
*
/**
* Server side implementation of the hound protocol. IPC connection handler.
* @param iid initial call id
* @param icall pointer to initial call structure.
* @param arg (unused)
*/
void hound_connection_handler(ipc_callid_t iid, ipc_call_t *icall, void *arg)
{
/* Accept connection if there is a valid iface*/
if (server_iface) {
async_answer_0(iid, EOK);
} else {
async_answer_0(iid, ENOTSUP);
return;
}
while (1) {
ipc_call_t call;
ipc_callid_t callid = async_get_call(&call);
switch (IPC_GET_IMETHOD(call)) {
case IPC_M_HOUND_CONTEXT_REGISTER: {
/* check interface functions */
if (!server_iface || !server_iface->add_context) {
async_answer_0(callid, ENOTSUP);
break;
}
bool record = IPC_GET_ARG1(call);
void *name;
/* Get context name */
int ret =
async_data_write_accept(&name, true, 0, 0, 0, 0);
if (ret != EOK) {
async_answer_0(callid, ret);
break;
}
hound_context_id_t id = 0;
ret = server_iface->add_context(server_iface->server,
&id, name, record);
/** new context should create a copy */
free(name);
if (ret != EOK) {
async_answer_0(callid, ret);
} else {
async_answer_1(callid, EOK, id);
}
break;
}
case IPC_M_HOUND_CONTEXT_UNREGISTER: {
/* check interface functions */
if (!server_iface || !server_iface->rem_context) {
async_answer_0(callid, ENOTSUP);
break;
}
/* get id, 1st param */
hound_context_id_t id = IPC_GET_ARG1(call);
const int ret =
server_iface->rem_context(server_iface->server, id);
async_answer_0(callid, ret);
break;
}
case IPC_M_HOUND_GET_LIST: {
/* check interface functions */
if (!server_iface || !server_iface->get_list) {
async_answer_0(callid, ENOTSUP);
break;
}
const char **list = NULL;
const int flags = IPC_GET_ARG1(call);
size_t count = IPC_GET_ARG2(call);
const bool conn = IPC_GET_ARG3(call);
char *conn_name = NULL;
int ret = EOK;
/* get connected actor name if provided */
if (conn)
ret = async_data_write_accept(
(void**)&conn_name, true, 0, 0, 0, 0);
if (ret == EOK)
ret = server_iface->get_list(
server_iface->server, &list, &count,
conn_name, flags);
free(conn_name);
/* Alloc string sizes array */
size_t *sizes = NULL;
if (count)
sizes = calloc(count, sizeof(size_t));
if (count && !sizes)
ret = ENOMEM;
async_answer_1(callid, ret, count);
/* We are done */
if (count == 0 || ret != EOK)
break;
/* Prepare sizes table */
for (unsigned i = 0; i < count; ++i)
sizes[i] = str_size(list[i]);
/* Send sizes table */
ipc_callid_t id;
if (async_data_read_receive(&id, NULL)) {
ret = async_data_read_finalize(id, sizes,
count * sizeof(size_t));
}
free(sizes);
/* Proceed to send names */
for (unsigned i = 0; i < count; ++i) {
size_t size = str_size(list[i]);
ipc_callid_t id;
if (ret == EOK &&
async_data_read_receive(&id, NULL)) {
ret = async_data_read_finalize(id,
list[i], size);
}
free(list[i]);
}
free(list);
break;
}
case IPC_M_HOUND_CONNECT: {
/* check interface functions */
if (!server_iface || !server_iface->connect) {
async_answer_0(callid, ENOTSUP);
break;
}
void *source = NULL;
void *sink = NULL;
/* read source name */
int ret =
async_data_write_accept(&source, true, 0, 0, 0, 0);
/* read sink name */
if (ret == EOK)
ret = async_data_write_accept(&sink,
true, 0, 0, 0, 0);
if (ret == EOK)
ret = server_iface->connect(
server_iface->server, source, sink);
free(source);
free(sink);
async_answer_0(callid, ret);
break;
}
case IPC_M_HOUND_DISCONNECT: {
/* check interface functions */
if (!server_iface || !server_iface->disconnect) {
async_answer_0(callid, ENOTSUP);
break;
}
void *source = NULL;
void *sink = NULL;
/* read source name */
int ret =
async_data_write_accept(&source, true, 0, 0, 0, 0);
/*read sink name */
if (ret == EOK)
ret = async_data_write_accept(&sink,
true, 0, 0, 0, 0);
if (ret == EOK)
ret = server_iface->connect(
server_iface->server, source, sink);
free(source);
free(sink);
async_answer_0(callid, ret);
break;
}
case IPC_M_HOUND_STREAM_ENTER: {
/* check interface functions */
if (!server_iface || !server_iface->is_record_context
|| !server_iface->add_stream
|| !server_iface->rem_stream) {
async_answer_0(callid, ENOTSUP);
break;
}
/* get parameters */
hound_context_id_t id = IPC_GET_ARG1(call);
const int flags = IPC_GET_ARG2(call);
const format_convert_t c = {.arg = IPC_GET_ARG3(call)};
const pcm_format_t f = {
.sampling_rate = c.f.rate * 100,
.channels = c.f.channels,
.sample_format = c.f.format,
};
size_t bsize = IPC_GET_ARG4(call);
void *stream;
int ret = server_iface->add_stream(server_iface->server,
id, flags, f, bsize, &stream);
if (ret != EOK) {
async_answer_0(callid, ret);
break;
}
const bool rec = server_iface->is_record_context(
server_iface->server, id);
if (rec) {
if(server_iface->stream_data_read) {
async_answer_0(callid, EOK);
/* start answering read calls */
hound_server_write_data(stream);
server_iface->rem_stream(
server_iface->server, stream);
} else {
async_answer_0(callid, ENOTSUP);
}
} else {
if (server_iface->stream_data_write) {
async_answer_0(callid, EOK);
/* accept write calls */
hound_server_read_data(stream);
server_iface->rem_stream(
server_iface->server, stream);
} else {
async_answer_0(callid, ENOTSUP);
}
}
break;
}
case IPC_M_HOUND_STREAM_EXIT:
case IPC_M_HOUND_STREAM_DRAIN:
/* Stream exit/drain is only allowed in stream context*/
async_answer_0(callid, EINVAL);
break;
default:
async_answer_0(callid, ENOTSUP);
return;
}
}
}
/**
* Read data and push it to the stream.
* @param stream target stream, will push data there.
*/
static void hound_server_read_data(void *stream)
{
ipc_callid_t callid;
ipc_call_t call;
size_t size = 0;
int ret_answer = EOK;
/* accept data write or drain */
while (async_data_write_receive_call(&callid, &call, &size)
|| (IPC_GET_IMETHOD(call) == IPC_M_HOUND_STREAM_DRAIN)) {
/* check drain first */
if (IPC_GET_IMETHOD(call) == IPC_M_HOUND_STREAM_DRAIN) {
int ret = ENOTSUP;
if (server_iface->drain_stream)
ret = server_iface->drain_stream(stream);
async_answer_0(callid, ret);
continue;
}
/* there was an error last time */
if (ret_answer != EOK) {
async_answer_0(callid, ret_answer);
continue;
}
char *buffer = malloc(size);
if (!buffer) {
async_answer_0(callid, ENOMEM);
continue;
}
const int ret = async_data_write_finalize(callid, buffer, size);
if (ret == EOK) {
/* push data to stream */
ret_answer = server_iface->stream_data_write(
stream, buffer, size);
}
}
const int ret = IPC_GET_IMETHOD(call) == IPC_M_HOUND_STREAM_EXIT
? EOK : EINVAL;
async_answer_0(callid, ret);
}
/** Perform a path lookup.
*
* @param path Path to be resolved; it must be a NULL-terminated
* string.
* @param lflag Flags to be used during lookup.
* @param result Empty structure where the lookup result will be stored.
* Can be NULL.
* @param altroot If non-empty, will be used instead of rootfs as the root
* of the whole VFS tree.
*
* @return EOK on success or an error code from errno.h.
*
*/
int vfs_lookup_internal(char *path, int lflag, vfs_lookup_res_t *result,
vfs_pair_t *altroot, ...)
{
vfs_pair_t *root;
if (altroot)
root = altroot;
else
root = &rootfs;
if (!root->fs_handle)
return ENOENT;
size_t len;
path = canonify(path, &len);
if (!path)
return EINVAL;
fs_index_t index = 0;
if (lflag & L_LINK) {
va_list ap;
va_start(ap, altroot);
index = va_arg(ap, fs_index_t);
va_end(ap);
}
fibril_mutex_lock(&plb_mutex);
plb_entry_t entry;
link_initialize(&entry.plb_link);
entry.len = len;
size_t first; /* the first free index */
size_t last; /* the last free index */
if (list_empty(&plb_entries)) {
first = 0;
last = PLB_SIZE - 1;
} else {
plb_entry_t *oldest = list_get_instance(
list_first(&plb_entries), plb_entry_t, plb_link);
plb_entry_t *newest = list_get_instance(
list_last(&plb_entries), plb_entry_t, plb_link);
first = (newest->index + newest->len) % PLB_SIZE;
last = (oldest->index - 1) % PLB_SIZE;
}
if (first <= last) {
if ((last - first) + 1 < len) {
/*
* The buffer cannot absorb the path.
*/
fibril_mutex_unlock(&plb_mutex);
return ELIMIT;
}
} else {
if (PLB_SIZE - ((first - last) + 1) < len) {
/*
* The buffer cannot absorb the path.
*/
fibril_mutex_unlock(&plb_mutex);
return ELIMIT;
}
}
/*
* We know the first free index in PLB and we also know that there is
* enough space in the buffer to hold our path.
*/
entry.index = first;
entry.len = len;
/*
* Claim PLB space by inserting the entry into the PLB entry ring
* buffer.
*/
list_append(&entry.plb_link, &plb_entries);
fibril_mutex_unlock(&plb_mutex);
/*
* Copy the path into PLB.
*/
size_t cnt1 = min(len, (PLB_SIZE - first) + 1);
size_t cnt2 = len - cnt1;
memcpy(&plb[first], path, cnt1);
memcpy(plb, &path[cnt1], cnt2);
ipc_call_t answer;
async_exch_t *exch = vfs_exchange_grab(root->fs_handle);
aid_t req = async_send_5(exch, VFS_OUT_LOOKUP, (sysarg_t) first,
(sysarg_t) (first + len - 1) % PLB_SIZE,
(sysarg_t) root->service_id, (sysarg_t) lflag, (sysarg_t) index,
&answer);
sysarg_t rc;
async_wait_for(req, &rc);
vfs_exchange_release(exch);
fibril_mutex_lock(&plb_mutex);
list_remove(&entry.plb_link);
/*
* Erasing the path from PLB will come handy for debugging purposes.
*/
memset(&plb[first], 0, cnt1);
memset(plb, 0, cnt2);
fibril_mutex_unlock(&plb_mutex);
if ((int) rc < EOK)
return (int) rc;
if (!result)
return EOK;
result->triplet.fs_handle = (fs_handle_t) rc;
result->triplet.service_id = (service_id_t) IPC_GET_ARG1(answer);
result->triplet.index = (fs_index_t) IPC_GET_ARG2(answer);
result->size =
(aoff64_t) MERGE_LOUP32(IPC_GET_ARG3(answer), IPC_GET_ARG4(answer));
result->lnkcnt = (unsigned int) IPC_GET_ARG5(answer);
if (lflag & L_FILE)
result->type = VFS_NODE_FILE;
else if (lflag & L_DIRECTORY)
result->type = VFS_NODE_DIRECTORY;
else
result->type = VFS_NODE_UNKNOWN;
return EOK;
}
