This commit streamlines the interaction between the Wifi::Manager
and the wpa_supplicant's CTRL interface.
As user-facing changes it alters some default settings and introduces
new features:
* Every configured network now needs to explicitly have its
'auto_connect' (to be considered an option for joining) attribute
set to 'true' whereas this was previously the default value if the
attribute was not set at all.
* The 'log_level' attribute is added and configures the supplicant's
verbosity. Valid values correspond to levels used by the supplicant
and are as follows 'excessive', 'msgdump', 'debug', 'info', 'warning'
and 'error'. The default value is 'error' and configures the least
amount of verbosity.
* The 'bgscan' attribute may be used to configure the way the
supplicant performs background-scanning to steer or rather optimize
roaming decision within the same network. The default value is set
to 'simple:30:-70:600'. It can be disabled by specifying an empty
value, e.g. 'bgscan=""'.
* The 'verbose_state' attribute was removed alltogether and similar
functionality is now coverted by 'verbose' attribute.
Implementation-wise the internals changed significantly and are
outlined in the following paragraphs.
Formerly the interaction between the manager and the supplicant
was handled in an apparent way where the internal state of each
interaction was in plain sight. This made the flow cumbersome to
follow and therefor each interaction is now confined to its own
'Action' object that encapsulates the ping-pong of commands and
responses between the manager and the supplicant. All actions are
processed in an sequential way and thus there is no longer any
need to defer pending actions depending on the interal state of
the current interaction. Configuration changes as well as events
issued by the supplicant where new actions can be created are
handled in this fashion. Of note are both signal-handlers,
'_handle_cmds' and '_handle_events' respectively.
The state report, which provides the information about the current
state of connectivity to a given wireless network, was dealt with
in the same vein and its handling was spread across the manager
implementation. Again, to make it easier to follow, the generation
of the state report is now purely driven by the 'Join_state' object.
This object encapsulates the state of connectivity and is normally
updated by events issued from the supplicant (see '_handle_events').
It is also incorporated when handling command responses (see
'_handle_cmds').
Handling of timed-actions, like scan and signal quality
update requests, was done by setting a timeout at the Timer session
directly and thus only one timed-action could be pending at any time.
This excluded dealing with timed-actions like connected-scanning
and signal quality polling concurrently. This was changed and now
a One_shot_timeout is used to programm each concurrent timed-action.
For implementing the communication channel for the CTRL interface the
manager and supplicant use a shared memory buffer, the Msg_buffer.
Since the CTRL interface for Genode was implemented using C, some
shenanigans were performed to access the memory buffer. Now the
CTRL interface implementation uses C++ and only exports the functions
required by the supplicant as C. This simplifies the usage of the
Msg_buffer and allows for removing the global functions needed for
synchronizing the Msg_buffer access as those are now part of the
object itself via the 'Notify_interface'.
Fixes#5341.
The 'convert_errno_from_linux' function was already used internally to
convert the Linux errno values to the matching FreeBSD libc ones when
calling socket functions.
It will now also be used to convert the error values included in
netlink messages as those, naturally, also correspond to the Linux
ones.
Issue #5341.
Now, we schedule before unblocking the rx_task. This is done in order to
execute a potentially ready ksoftirqd before unblocking the rx_task,
which in turn may execute soft-interrupt handlers through bottom half
code leading to double lock attempts of the socket spinlock.
Issue #5264
Unmasking of a pending interrupt did not lead to immediate IRQ handler
execution in all cases.
This commit also addresses some style concerns risen during the issue
discussion.
- Replace multi-boolean IRQ state by state enum
- EOI and ACK should be same in DDE context
- Unify x86 and ARM irqchip.c
- Remove Pending_irq type
- Remove dde_irq_set_wake()
Fixes#5164
The use of the Linux-internal SLUB allocator is supported by lx_emul and
drivers may now decide between the Linux implementation or our emulation
of kmem_cache. Drivers for pc and virt already use SLUB, while other
drivers still use the emulation and may be adapted step-by-step incl.
the testing on the devices.
Fixes#5236
- Move C++ sources from lib/wireguard to app/wireguard, which require
Genode include paths (that conflict with linux)
- Rename lib/wireguard_lx_inc_dirs to lib/wireguard, which builds linux
sources with linux include paths
This commit remedies the somewhat lazy attempt to address unique names
for drivers where the name is directly derived from KBUILD_MODNAME,
e.g. rtlwifi, and also modifies the name accordingly to the rules
of Linux' build-system. The last part becomes necessary as driver
matching tables may rely on that as has already happend with the
ti-sn65dsi86 driver.
The IP stack checks "user" pointer access, for example, for iov's using
'access_ok' which in turn calls '__access_ok'. The function checks if the
pointer is below TASK_SIZE_MAX, which is usually a big value on 64 bit
systems, but 3GB on 32 bit systems. Because the IP stack is mostly used with
Genode's libc, where pointers on some kernels (base-linux) can be >3GB and we
don't want to make an additional copy of each buffer/iov interacting with the
IP stack, we short circuit the function
issue #5165
The added hook 'OBJ_POSTPROC_SRC' gives us a way to post-process object
files for generating supplemental code. By using this hook, the
initcall_table.c generated by import-lx_emul_common.inc gets reliably
executed after all object files are built.
Fixes#5159
The option is used during the generation of initcall_table.c.
However, it happens to strip the first argument following the option.
The long option --defined-only works as expected.
Issue #5155
When SMP is enabled multicore specific instructions (e.g., pldw) are
generated. These are not supported and lead to invalid instruction
faults on uni-processor systems (like Cortex-A8). Therefore, we disable
SMP for arm_v7 in Linux code. This requires also a switch from the RCU
tree implementation to RCU tiny, which we shadow and dummy implemented.
issue #5104
Adjust the plugin to use the socket C-API found under
dde_linux/src/lib/lxip/include/genode_c_api/socket.h'.
This is the first minor step in generalizing the plugin.
isse #5104
This commit updates lxip from version 4.4.3 to 6.1.20. It uses the
current lx_kit approach and is a shared library again. The stack has
been tested for x86_32/x86_64/arm_v6/arm_v7/arm_8.
The C-interface of the IP stack can be found under
lxip/include/genode_c_api/socket.h.
issue #5104
Functions registered with 'module_init' (i.e., '__define_initcalls'),
'OF_DECLARE', and 'DECLARE_PCI_FIXUP_CLASS_FINAL' used to be static
constructors and had be explicitly registered using
'exec_static_constructors' before executing any Linux code.
With this commit we remove the constructor attributes from these
functions and create a global function pointer in the form of
__initptr_<name>_<id>_<counter>_<line number of macro>
'import-lx_emul_common.inc' will collect these '__initptr' symbols after
the compile step and generate a 'lx_emul_register_initcalls' function
that executes the functions pointed to. This step is now automatically
performed in 'lx_emul_start_kernel'. This way a call to
'exec_static_constructors' can be omitted in case there are no other
constructors in place.
issue #5096
The management of Linux page structs is now tied to the life time of DMA
buffers. Thus, page structs are created when a buffer is allocated and
deallocated only when a buffer is freed - not on lx_emul_mem_free()
because DMA buffers are cached. Page struct refcounting was entirely
reworked in lx_emul/shadow/mm/page_alloc.c.
Fixes#4809
This commit adds support to initialize the timekeeping for
the Linux subsystem with the value from the RTC.
Only the seconds part of timespec64 is supported.
Issue genodelabs/genode#4957
The driver is superseded by the USB network driver (usb_net) which also
contains MBIM support for LTE modems previously provided by this
driver.
issue #4958
Since the wireless LAN driver is actually a 'Libc::Component' due to
its incorporation of the 'wpa_spplicant' application, we have to
intercept its construction because we have to initialize the Lx_kit
environment before any static ctors are executed. Most Linux initcalls
are implemented as ctors that will be otherwise implicitly executed
before the controll is given to us in 'Libc::Component::construct'.
Issue #4927.
