cb176df60f
UPDATING INFO:
20100317:
/usr/src/etc/system.conf updated to ignore default kernel calls: copy
it (or merge it) to /etc/system.conf.
The hello driver (/dev/hello) added to the distribution:
# cd /usr/src/commands/scripts && make clean install
# cd /dev && MAKEDEV hello
KERNEL CHANGES:
- Generic signal handling support. The kernel no longer assumes PM as a signal
manager for every process. The signal manager of a given process can now be
specified in its privilege slot. When a signal has to be delivered, the kernel
performs the lookup and forwards the signal to the appropriate signal manager.
PM is the default signal manager for user processes, RS is the default signal
manager for system processes. To enable ptrace()ing for system processes, it
is sufficient to change the default signal manager to PM. This will temporarily
disable crash recovery, though.
- sys_exit() is now split into sys_exit() (i.e. exit() for system processes,
which generates a self-termination signal), and sys_clear() (i.e. used by PM
to ask the kernel to clear a process slot when a process exits).
- Added a new kernel call (i.e. sys_update()) to swap two process slots and
implement live update.
PM CHANGES:
- Posix signal handling is no longer allowed for system processes. System
signals are split into two fixed categories: termination and non-termination
signals. When a non-termination signaled is processed, PM transforms the signal
into an IPC message and delivers the message to the system process. When a
termination signal is processed, PM terminates the process.
- PM no longer assumes itself as the signal manager for system processes. It now
makes sure that every system signal goes through the kernel before being
actually processes. The kernel will then dispatch the signal to the appropriate
signal manager which may or may not be PM.
SYSLIB CHANGES:
- Simplified SEF init and LU callbacks.
- Added additional predefined SEF callbacks to debug crash recovery and
live update.
- Fixed a temporary ack in the SEF init protocol. SEF init reply is now
completely synchronous.
- Added SEF signal event type to provide a uniform interface for system
processes to deal with signals. A sef_cb_signal_handler() callback is
available for system processes to handle every received signal. A
sef_cb_signal_manager() callback is used by signal managers to process
system signals on behalf of the kernel.
- Fixed a few bugs with memory mapping and DS.
VM CHANGES:
- Page faults and memory requests coming from the kernel are now implemented
using signals.
- Added a new VM call to swap two process slots and implement live update.
- The call is used by RS at update time and in turn invokes the kernel call
sys_update().
RS CHANGES:
- RS has been reworked with a better functional decomposition.
- Better kernel call masks. com.h now defines the set of very basic kernel calls
every system service is allowed to use. This makes system.conf simpler and
easier to maintain. In addition, this guarantees a higher level of isolation
for system libraries that use one or more kernel calls internally (e.g. printf).
- RS is the default signal manager for system processes. By default, RS
intercepts every signal delivered to every system process. This makes crash
recovery possible before bringing PM and friends in the loop.
- RS now supports fast rollback when something goes wrong while initializing
the new version during a live update.
- Live update is now implemented by keeping the two versions side-by-side and
swapping the process slots when the old version is ready to update.
- Crash recovery is now implemented by keeping the two versions side-by-side
and cleaning up the old version only when the recovery process is complete.
DS CHANGES:
- Fixed a bug when the process doing ds_publish() or ds_delete() is not known
by DS.
- Fixed the completely broken support for strings. String publishing is now
implemented in the system library and simply wraps publishing of memory ranges.
Ideally, we should adopt a similar approach for other data types as well.
- Test suite fixed.
DRIVER CHANGES:
- The hello driver has been added to the Minix distribution to demonstrate basic
live update and crash recovery functionalities.
- Other drivers have been adapted to conform the new SEF interface.
104 lines
4.6 KiB
C
104 lines
4.6 KiB
C
/* Function prototypes. */
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/* Structs used in prototypes must be declared as such first. */
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struct rproc;
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/* exec.c */
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_PROTOTYPE( int srv_execve, (int proc_e,
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char *exec, size_t exec_len, char *argv[], char **env));
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/* main.c */
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_PROTOTYPE( int main, (void));
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/* request.c */
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_PROTOTYPE( int do_up, (message *m));
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_PROTOTYPE( int do_down, (message *m));
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_PROTOTYPE( int do_refresh, (message *m));
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_PROTOTYPE( int do_restart, (message *m));
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_PROTOTYPE( int do_shutdown, (message *m));
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_PROTOTYPE( void do_period, (message *m));
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_PROTOTYPE( int do_init_ready, (message *m));
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_PROTOTYPE( int do_update, (message *m));
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_PROTOTYPE( int do_upd_ready, (message *m));
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_PROTOTYPE( void do_sigchld, (void));
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_PROTOTYPE( int do_getsysinfo, (message *m));
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_PROTOTYPE( int do_lookup, (message *m));
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/* manager.c */
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_PROTOTYPE( int caller_is_root, (endpoint_t endpoint) );
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_PROTOTYPE( int caller_can_control, (endpoint_t endpoint, char *label) );
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_PROTOTYPE( int check_call_permission, (endpoint_t caller, int call,
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struct rproc *rp) );
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_PROTOTYPE( int copy_rs_start, (endpoint_t src_e, char *src_rs_start,
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struct rs_start *rs_start) );
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_PROTOTYPE( int copy_label, (endpoint_t src_e, char *src_label, size_t src_len,
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char *dst_label, size_t dst_len) );
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_PROTOTYPE( void build_cmd_dep, (struct rproc *rp) );
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_PROTOTYPE( int srv_fork, (void) );
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_PROTOTYPE( int srv_kill, (pid_t pid, int sig) );
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#define kill_service(rp, errstr, err) \
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kill_service_debug(__FILE__, __LINE__, rp, errstr, err)
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_PROTOTYPE( int kill_service_debug, (char *file, int line, struct rproc *rp,
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char *errstr, int err) );
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#define crash_service(rp) \
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crash_service_debug(__FILE__, __LINE__, rp)
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_PROTOTYPE( int crash_service_debug, (char *file, int line, struct rproc *rp) );
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#define cleanup_service(rp) \
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cleanup_service_debug(__FILE__, __LINE__, rp)
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_PROTOTYPE( void cleanup_service_debug, (char *file, int line,
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struct rproc *rp) );
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_PROTOTYPE( int create_service, (struct rproc *rp) );
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_PROTOTYPE( int publish_service, (struct rproc *rp) );
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_PROTOTYPE( int publish_process, (struct rproc *rp) );
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_PROTOTYPE( int unpublish_service, (struct rproc *rp) );
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_PROTOTYPE( int unpublish_process, (struct rproc *rp) );
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_PROTOTYPE( int run_service, (struct rproc *rp, int init_type) );
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_PROTOTYPE( int start_service, (struct rproc *rp) );
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_PROTOTYPE( void stop_service, (struct rproc *rp,int how) );
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_PROTOTYPE( int update_service, (struct rproc **src_rpp,
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struct rproc **dst_rpp) );
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_PROTOTYPE( void activate_service, (struct rproc *rp, struct rproc *ex_rp) );
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_PROTOTYPE( void terminate_service, (struct rproc *rp));
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_PROTOTYPE( void restart_service, (struct rproc *rp) );
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_PROTOTYPE( void inherit_service_defaults, (struct rproc *def_rp,
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struct rproc *rp) );
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_PROTOTYPE( void get_service_instances, (struct rproc *rp, struct rproc ***rps,
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int *length) );
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_PROTOTYPE( int read_exec, (struct rproc *rp) );
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_PROTOTYPE( void share_exec, (struct rproc *rp_src, struct rproc *rp_dst) );
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_PROTOTYPE( void free_exec, (struct rproc *rp) );
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_PROTOTYPE( int init_slot, (struct rproc *rp, struct rs_start *rs_start,
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endpoint_t source) );
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_PROTOTYPE( int clone_slot, (struct rproc *rp, struct rproc **clone_rpp) );
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_PROTOTYPE( void swap_slot, (struct rproc **src_rpp, struct rproc **dst_rpp) );
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_PROTOTYPE( struct rproc* lookup_slot_by_label, (char *label) );
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_PROTOTYPE( struct rproc* lookup_slot_by_pid, (pid_t pid) );
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_PROTOTYPE( int alloc_slot, (struct rproc **rpp) );
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_PROTOTYPE( void free_slot, (struct rproc *rp) );
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_PROTOTYPE( int run_script, (struct rproc *rp) );
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_PROTOTYPE( char *get_next_label, (char *ptr, char *label, char *caller_label));
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_PROTOTYPE( void add_forward_ipc, (struct rproc *rp, struct priv *privp) );
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_PROTOTYPE( void add_backward_ipc, (struct rproc *rp, struct priv *privp) );
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_PROTOTYPE( void init_privs, (struct rproc *rp, struct priv *privp) );
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_PROTOTYPE( void update_period, (message *m_ptr) );
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_PROTOTYPE( void end_update, (int result) );
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/* utility.c */
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_PROTOTYPE( int init_service, (struct rproc *rp, int type));
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_PROTOTYPE(void fill_call_mask, ( int *calls, int tot_nr_calls,
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bitchunk_t *call_mask, int call_base, int is_init));
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_PROTOTYPE( char* srv_to_string, (struct rproc *rp));
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_PROTOTYPE( void reply, (endpoint_t who, message *m_ptr));
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_PROTOTYPE( void late_reply, (struct rproc *rp, int code));
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_PROTOTYPE( int rs_isokendpt, (endpoint_t endpoint, int *proc));
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/* memory.c */
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_PROTOTYPE( void* rs_startup_sbrk, (size_t size));
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_PROTOTYPE( void* rs_startup_sbrk_synch, (size_t size));
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_PROTOTYPE( int rs_startup_segcopy, (endpoint_t src_proc, int src_s,
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int dst_s, vir_bytes dst_vir, phys_bytes bytes));
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/* error.c */
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_PROTOTYPE( char * init_strerror, (int errnum) );
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_PROTOTYPE( char * lu_strerror, (int errnum) );
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