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48 commits

Author SHA1 Message Date
Cristiano Giuffrida
d1fd04e72a Initialization protocol for system services.
SYSLIB CHANGES:
- SEF framework now supports a new SEF Init request type from RS. 3 different
callbacks are available (init_fresh, init_lu, init_restart) to specify
initialization code when a service starts fresh, starts after a live update,
or restarts.

SYSTEM SERVICE CHANGES:
- Initialization code for system services is now enclosed in a callback SEF will
automatically call at init time. The return code of the callback will
tell RS whether the initialization completed successfully.
- Each init callback can access information passed by RS to initialize. As of
now, each system service has access to the public entries of RS's system process
table to gather all the information required to initialize. This design
eliminates many existing or potential races at boot time and provides a uniform
initialization interface to system services. The same interface will be reused
for the upcoming publish/subscribe model to handle dynamic 
registration / deregistration of system services.

VM CHANGES:
- Uniform privilege management for all system services. Every service uses the
same call mask format. For boot services, VM copies the call mask from init
data. For dynamic services, VM still receives the call mask via rs_set_priv
call that will be soon replaced by the upcoming publish/subscribe model.

RS CHANGES:
- The system process table has been reorganized and split into private entries
and public entries. Only the latter ones are exposed to system services.
- VM call masks are now entirely configured in rs/table.c
- RS has now its own slot in the system process table. Only kernel tasks and
user processes not included in the boot image are now left out from the system
process table.
- RS implements the initialization protocol for system services.
- For services in the boot image, RS blocks till initialization is complete and
panics when failure is reported back. Services are initialized in their order of
appearance in the boot image priv table and RS blocks to implements synchronous
initialization for every system service having the flag SF_SYNCH_BOOT set.
- For services started dynamically, the initialization protocol is implemented
as though it were the first ping for the service. In this case, if the
system service fails to report back (or reports failure), RS brings the service
down rather than trying to restart it.
2010-01-08 01:20:42 +00:00
Cristiano Giuffrida
1f5841c8ed Basic System Event Framework (SEF) with ping and live update.
SYSLIB CHANGES:
- SEF must be used by every system process and is thereby part of the system
library.
- The framework provides a receive() interface (sef_receive) for system
processes to automatically catch known system even messages and process them.
- SEF provides a default behavior for each type of system event, but allows
system processes to register callbacks to override the default behavior.
- Custom (local to the process) or predefined (provided by SEF) callback
implementations can be registered to SEF.
- SEF currently includes support for 2 types of system events:
  1. SEF Ping. The event occurs every time RS sends a ping to figure out
  whether a system process is still alive. The default callback implementation
  provided by SEF is to notify RS back to let it know the process is alive
  and kicking.
  2. SEF Live update. The event occurs every time RS sends a prepare to update
  message to let a system process know an update is available and to prepare
  for it. The live update support is very basic for now. SEF only deals with
  verifying if the prepare state can be supported by the process, dumping the
  state for debugging purposes, and providing an event-driven programming
  model to the process to react to state changes check-in when ready to update.
- SEF should be extended in the future to integrate support for more types of
system events. Ideally, all the cross-cutting concerns should be integrated into
SEF to avoid duplicating code and ease extensibility. Examples include:
  * PM notify messages primarily used at shutdown.
  * SYSTEM notify messages primarily used for signals.
  * CLOCK notify messages used for system alarms.
  * Debug messages. IS could still be in charge of fkey handling but would
  forward the debug message to the target process (e.g. PM, if the user
  requested debug information about PM). SEF would then catch the message and
  do nothing unless the process has registered an appropriate callback to
  deal with the event. This simplifies the programming model to print debug
  information, avoids duplicating code, and reduces the effort to print
  debug information.

SYSTEM PROCESSES CHANGES:
- Every system process registers SEF callbacks it needs to override the default
system behavior and calls sef_startup() right after being started.
- sef_startup() does almost nothing now, but will be extended in the future to
support callbacks of its own to let RS control and synchronize with every
system process at initialization time.
- Every system process calls sef_receive() now rather than receive() directly,
to let SEF handle predefined system events.

RS CHANGES:
- RS supports a basic single-component live update protocol now, as follows:
  * When an update command is issued (via "service update *"), RS notifies the
  target system process to prepare for a specific update state.
  * If the process doesn't respond back in time, the update is aborted.
  * When the process responds back, RS kills it and marks it for refreshing.
  * The process is then automatically restarted as for a buggy process and can
  start running again.
  * Live update is currently prototyped as a controlled failure.
2009-12-21 14:12:21 +00:00
David van Moolenbroek
b423d7b477 Merge of David's ptrace branch. Summary:
o Support for ptrace T_ATTACH/T_DETACH and T_SYSCALL
o PM signal handling logic should now work properly, even with debuggers
  being present
o Asynchronous PM/VFS protocol, full IPC support for senda(), and
  AMF_NOREPLY senda() flag

DETAILS

Process stop and delay call handling of PM:
o Added sys_runctl() kernel call with sys_stop() and sys_resume()
  aliases, for PM to stop and resume a process
o Added exception for sending/syscall-traced processes to sys_runctl(),
  and matching SIGKREADY pseudo-signal to PM
o Fixed PM signal logic to deal with requests from a process after
  stopping it (so-called "delay calls"), using the SIGKREADY facility
o Fixed various PM panics due to race conditions with delay calls versus
  VFS calls
o Removed special PRIO_STOP priority value
o Added SYS_LOCK RTS kernel flag, to stop an individual process from
  running while modifying its process structure

Signal and debugger handling in PM:
o Fixed debugger signals being dropped if a second signal arrives when
  the debugger has not retrieved the first one
o Fixed debugger signals being sent to the debugger more than once
o Fixed debugger signals unpausing process in VFS; removed PM_UNPAUSE_TR
  protocol message
o Detached debugger signals from general signal logic and from being
  blocked on VFS calls, meaning that even VFS can now be traced
o Fixed debugger being unable to receive more than one pending signal in
  one process stop
o Fixed signal delivery being delayed needlessly when multiple signals
  are pending
o Fixed wait test for tracer, which was returning for children that were
  not waited for
o Removed second parallel pending call from PM to VFS for any process
o Fixed process becoming runnable between exec() and debugger trap
o Added support for notifying the debugger before the parent when a
  debugged child exits
o Fixed debugger death causing child to remain stopped forever
o Fixed consistently incorrect use of _NSIG

Extensions to ptrace():
o Added T_ATTACH and T_DETACH ptrace request, to attach and detach a
  debugger to and from a process
o Added T_SYSCALL ptrace request, to trace system calls
o Added T_SETOPT ptrace request, to set trace options
o Added TO_TRACEFORK trace option, to attach automatically to children
  of a traced process
o Added TO_ALTEXEC trace option, to send SIGSTOP instead of SIGTRAP upon
  a successful exec() of the tracee
o Extended T_GETUSER ptrace support to allow retrieving a process's priv
  structure
o Removed T_STOP ptrace request again, as it does not help implementing
  debuggers properly
o Added MINIX3-specific ptrace test (test42)
o Added proper manual page for ptrace(2)

Asynchronous PM/VFS interface:
o Fixed asynchronous messages not being checked when receive() is called
  with an endpoint other than ANY
o Added AMF_NOREPLY senda() flag, preventing such messages from
  satisfying the receive part of a sendrec()
o Added asynsend3() that takes optional flags; asynsend() is now a
  #define passing in 0 as third parameter
o Made PM/VFS protocol asynchronous; reintroduced tell_fs()
o Made PM_BASE request/reply number range unique
o Hacked in a horrible temporary workaround into RS to deal with newly
  revealed RS-PM-VFS race condition triangle until VFS is asynchronous

System signal handling:
o Fixed shutdown logic of device drivers; removed old SIGKSTOP signal
o Removed is-superuser check from PM's do_procstat() (aka getsigset())
o Added sigset macros to allow system processes to deal with the full
  signal set, rather than just the POSIX subset

Miscellaneous PM fixes:
o Split do_getset into do_get and do_set, merging common code and making
  structure clearer
o Fixed setpriority() being able to put to sleep processes using an
  invalid parameter, or revive zombie processes
o Made find_proc() global; removed obsolete proc_from_pid()
o Cleanup here and there

Also included:
o Fixed false-positive boot order kernel warning
o Removed last traces of old NOTIFY_FROM code

THINGS OF POSSIBLE INTEREST

o It should now be possible to run PM at any priority, even lower than
  user processes
o No assumptions are made about communication speed between PM and VFS,
  although communication must be FIFO
o A debugger will now receive incoming debuggee signals at kill time
  only; the process may not yet be fully stopped
o A first step has been made towards making the SYSTEM task preemptible
2009-09-30 09:57:22 +00:00
Tomas Hruby
4dad30937b Removed macros that depend on NOTIFY_FROM from servers and drivers. They
determine the information defined by these macros from the m_source field of the
notify message.
2009-09-29 18:47:56 +00:00
David van Moolenbroek
7e9e0ce9bc FXP: support for 8086/1064 (reported and tested by Jose Luis Sanchez) 2009-08-30 16:13:46 +00:00
Erik van der Kouwe
ada4859302 Extend Intel PRO/100 support 2009-08-26 21:01:46 +00:00
Ben Gras
1d8aed840c . no more HZ, but use sys_hz() to get that value
. memory maps in physical memory (for /dev/mem) with new vm interface
 . pci complete_bars() seems to be buggy behaviour sometimes
 . startup script opens its own stdout, stderr and stdin so init doesn't
   have to do it
2008-12-11 14:42:23 +00:00
Ben Gras
c078ec0331 Basic VM and other minor improvements.
Not complete, probably not fully debugged or optimized.
2008-11-19 12:26:10 +00:00
Philip Homburg
668515afe2 More heap for fxp, support for I/O MMU. 2008-02-25 10:12:09 +00:00
Ben Gras
03446f5554 micro_delay in sysutil, used in ti1225, dp8390, fxp and
orinoco now. Uses a combination of tickdelay (where possible) and
calibrated busywait (where necessary).
2007-07-31 15:01:49 +00:00
Philip Homburg
2d49b4ecb5 Use ds_retrieve_u32 to get the endpoint of inet. 2007-05-02 11:39:10 +00:00
Philip Homburg
50f81c4939 Ethernet driver changes for asynchronous inet. 2007-04-23 15:38:00 +00:00
Ben Gras
9f2f3dd488 don't call mkdep with an absolute path 2007-02-08 16:26:20 +00:00
Ben Gras
7195fe3325 System statistical and call profiling
support by Rogier Meurs <rogier@meurs.org>.
2006-10-30 15:53:38 +00:00
Ben Gras
21ed846479 More memory for these drivers 2006-10-25 13:39:53 +00:00
Philip Homburg
2cf649db2e Safecopy support in ethernet drivers. 2006-07-10 12:43:38 +00:00
Ben Gras
0d39b17655 Changed order of -lsys and -lsysutil for printf() 2006-06-20 10:50:29 +00:00
Ben Gras
7b58dd7f9b Renamed findproc() to _pm_findproc() to reduce polluting of application
namespace.
2006-03-25 04:49:04 +00:00
Ben Gras
71fd7596fa Understand PROC_EVENT 2006-03-10 16:27:21 +00:00
Philip Homburg
24cf667abb PCI support in a separate driver. 2005-12-02 14:45:10 +00:00
Philip Homburg
83df200475 Less restrictive I/O port check. 2005-11-03 13:42:56 +00:00
Ben Gras
2b23d38c5b Panic fix 2005-10-21 18:20:26 +00:00
Jorrit Herder
f8edaa7de4 Added replies to status requests from RS. 2005-10-21 14:39:21 +00:00
Philip Homburg
724813fdce Prelim commit for ethernet driver crash recovery. 2005-10-21 11:51:45 +00:00
Philip Homburg
5871979657 More stack space for dp8390, floppy, and fxp 2005-09-30 13:02:17 +00:00
Ben Gras
e2e90b1fdc Remove double-blank lines (Al) 2005-08-22 15:17:42 +00:00
Ben Gras
53eba5e044 'send locked' debug statement #if 0ed 2005-08-05 12:55:18 +00:00
Ben Gras
2be2bce18c #if VERBOSE
debug statements
#endif
2005-08-04 08:07:29 +00:00
Jorrit Herder
3f28baac83 Disabled comments from FXP driver with #define VERBOSE 0.
Fixed all troubles reported at shutdown.
No more illegal FS calls by dead processes.
2005-08-03 16:58:22 +00:00
Jorrit Herder
375f6f8754 Miscellaneous cleanups. 2005-08-03 11:53:36 +00:00
Jorrit Herder
0bd61375ad Miscellaneous small fixes to prettify startup output. 2005-08-02 15:56:24 +00:00
Jorrit Herder
52965b6f17 Various updates to support dynamically starting drivers.
Output during initialization should be suppressed. Unless an error occurs.
Note that main() can now be main(int argc, char **argv) and arguments can
be passed when bringing up the driver.
2005-08-02 15:30:36 +00:00
Jorrit Herder
aec394a330 Updated drivers according to syslib interface changes. 2005-07-29 15:00:22 +00:00
Jorrit Herder
d62e515660 Small update to SYS_IRQCTL -> setting an interrupt policy now allows the caller
to provide an index (0 .. 31) that is passed in the HARD_INT message when an
interrupt occurs. The NOTIFY_ARG field contains a bitmap with all indexes for
which an interrupt occured.
2005-07-29 12:44:42 +00:00
Jorrit Herder
d2d975246d Kernel sends SIGKSTOP just before shutdown. Drivers do clean up and exit. 2005-07-20 15:28:05 +00:00
Jorrit Herder
5594b767c0 Renamed src/lib/utils to src/lib/sysutil --- because of new src/lib/util 2005-07-19 13:21:51 +00:00
Jorrit Herder
8c024e28a1 Changed Makefiles: drivers are now installed in /usr/sbin.
TTY now gets SYS_EVENT message with sigset (e.g., SIGKMESS, SIGKSTOP).
2005-07-19 12:12:48 +00:00
Jorrit Herder
279250889f Renamed some system library functionality. 2005-07-14 15:15:18 +00:00
Ben Gras
e0e5e62230 Increased timeout to avoid 'CU does not accept command' panic.. 2005-07-13 11:50:30 +00:00
Philip Homburg
ed66b0ff02 Increased mii_read timeout. 2005-07-11 13:09:44 +00:00
Ben Gras
62cb81cb3a Fixed typo in printf() in fxp debug statement (caused delta
value not to be printed)
2005-06-27 08:55:34 +00:00
Jorrit Herder
5654996c07 New Makefiles for mkdep script. 2005-06-24 16:21:54 +00:00
Ben Gras
4ab7f34ea0 Workaround for fishy situation that caused checksum on outgoing packets
to be broken in certain cases. (Seemingly when 2 short packets sent
back-to-back.) Buffer alignment seems to fix this ...
2005-06-22 15:22:34 +00:00
Ben Gras
471e0448c3 Changed timer library function args.
Added select() support for tty fd's (not ptys yet).
2005-06-17 13:37:41 +00:00
Philip Homburg
b658df42d0 Use relative paths. 2005-06-06 16:18:05 +00:00
Jorrit Herder
6d23f072f3 Cleaned up src/lib/utils library. Renamed server_ functions to more logical
names. All system processes can now either use panic() or report() from
libutils, or redefine their own function. Assertions are done via the standard
<assert.h> functionality.
2005-06-01 14:31:00 +00:00
Jorrit Herder
0165662cd9 Replaced flagalrm() timers with another technique to check for timeouts.
This allowed removing the p_flagarlm timer from the kernel's process table.
Furthermore, I merged p_syncalrm and p_signalrm into p_alarm_timer to save
even more space. Note that processes can no longer have both a signal and
synchronous alarm timer outstanding as of now.
2005-05-31 14:43:04 +00:00
Philip Homburg
129b82d207 Added fxp driver for the Intel Pro/100 series ethernet cards
Print PC in hex for easier debugging.
2005-05-19 13:27:05 +00:00