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ahci: driver improve diagnostic messages for empty ports

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Fix #3709
This commit is contained in:
Emery Hemingway 2020-03-22 19:16:43 +05:30 committed by Norman Feske
parent 358fdd54b9
commit 7a5841b637
1 changed files with 20 additions and 26 deletions
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46
repos/os/src/drivers/ahci/main.cc
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@ -154,24 +154,33 @@ class Ahci::Driver : Noncopyable
/* clear status register */
_hba.ack_irq();
}
Port &port(long device, char const *model_num, char const *serial_num)
Port &port(Session_label const &label, Session_policy const &policy)
{
/* try read device port number attribute */
long device = policy.attribute_value("device", -1L);
/* try read device model and serial number attributes */
auto const model = policy.attribute_value("model", String<64>());
auto const serial = policy.attribute_value("serial", String<64>());
/* check for model/device */
if (model_num && serial_num) {
if (model != "" && serial != "") {
for (long index = 0; index < MAX_PORTS; index++) {
if (!_ata[index].constructed()) continue;
Ata::Protocol &protocol = *_ata[index];
if (*protocol.model == model_num && *protocol.serial == serial_num)
if (*protocol.model == model.string() && *protocol.serial == serial.string())
return *_ports[index];
}
warning("No device with model ", model, " and serial ", serial, " found for \"", label, "\"");
}
/* check for device number */
if (device >= 0 && device < MAX_PORTS && _ports[device].constructed())
return *_ports[device];
throw -1;
warning("No device found on port ", device, " for \"", label, "\"");
throw Service_denied();
}
template <typename FN> void for_each_port(FN const &fn)
@ -353,31 +362,16 @@ struct Ahci::Main : Rpc_object<Typed_root<Block::Session>>,
throw Insufficient_ram_quota();
}
/* try read device port number attribute */
long device = policy.attribute_value("device", -1L);
Port &port = driver->port(label, policy);
/* try read device model and serial number attributes */
auto const model = policy.attribute_value("model", String<64>());
auto const serial = policy.attribute_value("serial", String<64>());
bool const writeable = policy.attribute_value("writeable", false);
try {
Port &port = driver->port(device, model.string(), serial.string());
if (block_session[port.index].constructed()) {
error("Device with number=", port.index, " is already in use");
throw Service_denied();
}
port.writeable(writeable);
block_session[port.index].construct(env, port, tx_buf_size);
return block_session[port.index]->cap();
} catch (...) {
error("rejecting session request, no matching policy for '", label, "'",
" (model=", model, " serial=", serial, " device index=", device, ")");
if (block_session[port.index].constructed()) {
error("Device with number=", port.index, " is already in use");
throw Service_denied();
}
throw Service_denied();
port.writeable(policy.attribute_value("writeable", false));
block_session[port.index].construct(env, port, tx_buf_size);
return block_session[port.index]->cap();
}
void upgrade(Session_capability, Root::Upgrade_args const&) override { }