Commit graph

16 commits

Author SHA1 Message Date
Kees van Reeuwijk
df60646f98 Undo the use of #include <...> because it caused some errors. 2010-02-12 14:43:18 +00:00
Kees van Reeuwijk
064cb7583a Lots of small code cleanup: make symbols local, remove unused symbols,
fixed a typo, removed a now unused header file.
Use #include <..> for header files that represent libraries.
2010-02-09 15:23:38 +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
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
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
Ben Gras
0d39b17655 Changed order of -lsys and -lsysutil for printf() 2006-06-20 10:50:29 +00:00
Philip Homburg
24cf667abb PCI support in a separate driver. 2005-12-02 14:45:10 +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
5654996c07 New Makefiles for mkdep script. 2005-06-24 16:21:54 +00:00
Philip Homburg
b658df42d0 Use relative paths. 2005-06-06 16:18:05 +00:00
Ben Gras
308d9a693c prettified rtl driver:
. no more kmalloc
 . no more umaps + physcopies / abscopies
 . the status register is directly readable from the drivers own
   address space now, and no physcopy is needed to read it
 . map+physcopy call combinations are replaced by vircopy calls
2005-06-03 08:59:54 +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
fbe1641bd3 User-space networking!
- RTL8139 driver moved to user-space;
- PCI code moved to user-space;
Fixed IRQ hook dump at IS server.
2005-05-11 09:02:00 +00:00