sanchayanmaity/minix
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

rs: New RS.

Browse source 
Change-Id: I46e335d5dac49104028d7cb0706b3e85de752bfe
This commit is contained in:
Cristiano Giuffrida 2014-10-27 22:36:25 +01:00 committed by David van Moolenbroek
parent d196e2c333
commit fb6bd596bf
14 changed files with 2424 additions and 566 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
etc/rs.inet
View file

@ -55,6 +55,8 @@ disabled()
exec > /dev/console
echo "Arguments: $@"
restarts=$(grep restarts /proc/service/$1 |cut -d: -f2)
restarts=$(( $restarts + 1 ))
service down "$1"
kill_by_name dhcpd
kill_by_name nonamed
@ -64,10 +66,10 @@ kill_by_name syslogd
sleep 3
if [ X`/bin/sysenv lwip` = Xyes ]
then
service up /service/lwip -script /etc/rs.inet -dev /dev/ip
service up /service/lwip -script /etc/rs.inet -dev /dev/ip -restarts $restarts
dhcpd --lwip &
else
service up /service/inet -script /etc/rs.inet -dev /dev/ip
service up /service/inet -script /etc/rs.inet -dev /dev/ip -restarts $restarts
daemonize dhcpd
fi
daemonize nonamed -L

26
minix/commands/service/service.c
View file

@ -84,7 +84,8 @@ static int known_request_types[] = {
#define OPT_REUSE "-r" /* reuse executable image */
#define OPT_NOBLOCK "-n" /* unblock caller immediately */
#define OPT_REPLICA "-p" /* create replica for the service */
#define OPT_BATCH "-b" /* batch mode */
#define OPT_NO_BIN_EXP "-b" /* no binary exponential backoff */
#define OPT_BATCH "-q" /* batch mode */
#define OPT_ASR_LU "-a" /* asr update */
#define OPT_PREPARE_ONLY_LU "-o" /* prepare-only update */
#define OPT_FORCE_SELF_LU "-s" /* force self update */
@ -134,6 +135,7 @@ static int known_request_types[] = {
#define ARG_TRG_LABELNAME "-trg-label" /* target label name */
#define ARG_LU_IPC_BL "-ipc_bl" /* IPC blacklist filter */
#define ARG_LU_IPC_WL "-ipc_wl" /* IPC whitelist filter */
#define ARG_RESTARTS "-restarts" /* number of restarts */
/* The function parse_arguments() verifies and parses the command line
* parameters passed to this utility. Request parameters that are needed
@ -154,6 +156,7 @@ static char *req_config = PATH_CONFIG;
static int custom_config_file = 0;
static int req_lu_state = DEFAULT_LU_STATE;
static int req_lu_maxtime = DEFAULT_LU_MAXTIME;
static int req_restarts = 0;
static long req_heap_prealloc = 0;
static long req_map_prealloc = 0;
static int req_sysctl_type = 0;
@ -171,15 +174,16 @@ static void print_usage(char *app_name, char *problem)
fprintf(stderr, "Warning, %s\n", problem);
fprintf(stderr, "Usage:\n");
fprintf(stderr,
" %s [%s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s] (up|run|edit|update) <binary|%s> [%s <args>] [%s <special>] [%s <major_nr>] [%s <dev_id>] [%s <ticks>] [%s <path>] [%s <name>] [%s <path>] [%s <state value|eval_expression>] [%s <time>] [%s <bytes>] [%s <bytes>] [%s <name>] [(%s|%s <src_label1,src_type1:src_label2,:,src_type3:...>)*]\n",
app_name, OPT_COPY, OPT_REUSE, OPT_NOBLOCK, OPT_REPLICA,
" %s [%s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s] (up|run|edit|update) <binary|%s> [%s <args>] [%s <special>] [%s <major_nr>] [%s <dev_id>] [%s <ticks>] [%s <path>] [%s <name>] [%s <path>] [%s <state value|eval_expression>] [%s <time>] [%s <bytes>] [%s <bytes>] [%s <name>] [(%s|%s <src_label1,src_type1:src_label2,:,src_type3:...>)*] [%s <restarts>]\n",
app_name, OPT_COPY, OPT_REUSE, OPT_NOBLOCK, OPT_REPLICA, OPT_NO_BIN_EXP,
OPT_BATCH, OPT_ASR_LU, OPT_PREPARE_ONLY_LU, OPT_FORCE_SELF_LU,
OPT_FORCE_INIT_CRASH, OPT_FORCE_INIT_FAIL, OPT_FORCE_INIT_TIMEOUT,
OPT_FORCE_INIT_DEFCB, OPT_UNSAFE_LU, OPT_NOMMAP_LU, OPT_DETACH,
OPT_NORESTART, OPT_FORCE_INIT_ST, SELF_BINARY,
ARG_ARGS, ARG_DEV, ARG_MAJOR, ARG_DEVMANID, ARG_PERIOD,
ARG_SCRIPT, ARG_LABELNAME, ARG_CONFIG, ARG_LU_STATE, ARG_LU_MAXTIME,
ARG_HEAP_PREALLOC, ARG_MAP_PREALLOC, ARG_TRG_LABELNAME, ARG_LU_IPC_BL, ARG_LU_IPC_WL);
ARG_HEAP_PREALLOC, ARG_MAP_PREALLOC, ARG_TRG_LABELNAME, ARG_LU_IPC_BL, ARG_LU_IPC_WL,
ARG_RESTARTS);
fprintf(stderr, " %s down <label>\n", app_name);
fprintf(stderr, " %s refresh <label>\n", app_name);
fprintf(stderr, " %s restart <label>\n", app_name);
@ -627,6 +631,14 @@ static int parse_arguments(int argc, char **argv, u32_t *rss_flags)
exit(r);
}
}
else if (strcmp(argv[i], ARG_RESTARTS)==0) {
errno=0;
req_restarts = strtol(argv[i+1], &buff, 10);
if(errno || strcmp(buff, "") || req_restarts<0) {
print_usage(argv[ARG_NAME], "bad number of restarts");
exit(EINVAL);
}
}
else {
print_usage(argv[ARG_NAME], "unknown optional argument given");
exit(EINVAL);
@ -726,6 +738,8 @@ int main(int argc, char **argv)
memset(&config, 0, sizeof(config));
if(!parse_config(progname, custom_config_file, req_config, &config))
errx(1, "couldn't parse config");
assert(config.rs_start.rss_priority < NR_SCHED_QUEUES);
assert(config.rs_start.rss_quantum > 0);
}
/* Set specifics */
@ -734,6 +748,7 @@ int main(int argc, char **argv)
config.rs_start.rss_major= req_major;
config.rs_start.rss_period= req_period;
config.rs_start.rss_script= req_script;
config.rs_start.rss_restarts= req_restarts;
config.rs_start.devman_id= devman_id;
config.rs_start.rss_heap_prealloc_bytes= req_heap_prealloc;
config.rs_start.rss_map_prealloc_bytes= req_map_prealloc;
@ -757,9 +772,6 @@ int main(int argc, char **argv)
else
config.rs_start.rss_scriptlen= 0;
assert(config.rs_start.rss_priority < NR_SCHED_QUEUES);
assert(config.rs_start.rss_quantum > 0);
/* State-related data. */
config.rs_start.rss_state_data.size =
sizeof(config.rs_start.rss_state_data);

4
minix/include/minix/rs.h
View file

@ -114,6 +114,7 @@ struct rs_start
long rss_period;
char *rss_script;
size_t rss_scriptlen;
long rss_restarts;
long rss_heap_prealloc_bytes;
long rss_map_prealloc_bytes;
int rss_nr_irq;
@ -191,9 +192,10 @@ struct rprocpub {
#define SF_USE_SCRIPT 0x200 /* set when process has restart script */
#define SF_DET_RESTART 0x400 /* set when process detaches on restart */
#define SF_NORESTART 0x800 /* set when process should not be restarted */
#define SF_NO_BIN_EXP 0x1000 /* set when we should ignore binary exp. offset */
#define IMM_SF \
(SF_CORE_SRV | SF_SYNCH_BOOT | SF_NEED_COPY | SF_NEED_REPL) /* immutable */
(SF_NO_BIN_EXP | SF_CORE_SRV | SF_SYNCH_BOOT | SF_NEED_COPY | SF_NEED_REPL) /* immutable */
int minix_rs_lookup(const char *name, endpoint_t *value);

6
minix/servers/rs/Makefile
View file

@ -2,7 +2,11 @@
# Makefile for Reincarnation Server (RS)
PROG= rs
SRCS= exec.c main.c request.c manager.c table.c utility.c error.c
SRCS= exec.c main.c request.c manager.c table.c utility.c error.c update.c
.if ${USE_PCI} != "no"
CPPFLAGS+= -DUSE_PCI
.endif
.if ${USE_PCI} != "no"
CPPFLAGS+= -DUSE_PCI

66
minix/servers/rs/const.h
View file

@ -22,6 +22,7 @@
#define MAX_IPC_LIST 256 /* Max size of list for IPC target
* process names
*/
#define MAX_DET_RESTART 10 /* maximum number of detached restarts. */
/* Flag values. */
#define RS_IN_USE 0x001 /* set when process slot is in use */
@ -32,17 +33,16 @@
#define RS_LATEREPLY 0x020 /* no reply sent to RS_DOWN caller yet */
#define RS_INITIALIZING 0x040 /* set when init is in progress */
#define RS_UPDATING 0x080 /* set when update is in progress */
#define RS_ACTIVE 0x100 /* set for the active instance of a service */
#define RS_REINCARNATE 0x200 /* after exit, restart with a new endpoint */
#define RS_PREPARE_DONE 0x100 /* set when updating and preparation is done */
#define RS_INIT_DONE 0x200 /* set when updating and init is done */
#define RS_INIT_PENDING 0x400 /* set when updating and init is pending */
#define RS_ACTIVE 0x800 /* set for the active instance of a service */
#define RS_DEAD 0x1000 /* set for an instance ready to be cleaned up */
#define RS_CLEANUP_DETACH 0x2000 /* detach at cleanup time */
#define RS_CLEANUP_SCRIPT 0x4000 /* run script at cleanup time */
#define RS_REINCARNATE 0x8000 /* after exit, restart with a new endpoint */
/* Sys flag values. */
#define SF_CORE_SRV 0x001 /* set for core system services */
#define SF_SYNCH_BOOT 0X002 /* set when process needs synch boot init */
#define SF_NEED_COPY 0x004 /* set when process needs copy to start */
#define SF_USE_COPY 0x008 /* set when process has a copy in memory */
#define SF_NEED_REPL 0x010 /* set when process needs replica to start */
#define SF_USE_REPL 0x020 /* set when process has a replica */
#define SF_NO_BIN_EXP 0x040 /* set when we should ignore binary exp. offset */
#define RS_SRV_IS_IDLE(S) (((S)->r_flags & RS_DEAD) || ((S)->r_flags & ~(RS_IN_USE|RS_ACTIVE|RS_CLEANUP_DETACH|RS_CLEANUP_SCRIPT)) == 0)
/* Constants determining RS period and binary exponential backoff. */
#define RS_INIT_T (system_hz * 10) /* allow T ticks for init */
@ -56,8 +56,6 @@
/* Constants for live update. */
#define RS_DEFAULT_PREPARE_MAXTIME 2*RS_DELTA_T /* default prepare max time */
#define RS_MAX_PREPARE_MAXTIME 20*RS_DELTA_T /* max prepare max time */
/* Definitions for boot info tables. */
#define NULL_BOOT_NR NR_BOOT_PROCS /* marks a null boot entry */
@ -75,10 +73,54 @@
/* Reply flags. */
#define RS_DONTREPLY 0
#define RS_REPLY 1
#define RS_CANCEL 2
/* Swap flags. */
#define RS_DONTSWAP 0
#define RS_SWAP 1
/* Configuration constants */
#define RS_VM_DEFAULT_MAP_PREALLOC_LEN (1024*1024*8)
#define RS_USE_PAGING 0
/* Update macros. */
#define RUPDATE_INIT() memset(&rupdate, 0, sizeof(rupdate))
#define RUPDATE_CLEAR() RUPDATE_INIT()
#define RUPDATE_ITER(HEAD, RPUPD_PREV, RPUPD, B) do { \
RPUPD = HEAD; \
RPUPD_PREV = NULL; \
while(RPUPD) { \
B \
RPUPD_PREV = RPUPD; \
RPUPD = RPUPD->next_rpupd; \
} \
} while(0)
#define RUPDATE_REV_ITER(TAIL, RPUPD_PREV, RPUPD, B) do { \
RPUPD = TAIL; \
while(RPUPD) { \
RPUPD_PREV = RPUPD->prev_rpupd; \
B \
RPUPD = RPUPD->prev_rpupd; \
} \
} while(0)
#define RUPDATE_IS_UPDATING() (rupdate.flags & RS_UPDATING)
#define RUPDATE_IS_VM_UPDATING() ((rupdate.flags & RS_UPDATING) && rupdate.vm_rpupd)
#define RUPDATE_IS_VM_INIT_DONE() (rproc_ptr[_ENDPOINT_P(VM_PROC_NR)]->r_flags & RS_INIT_DONE)
#define RUPDATE_IS_RS_UPDATING() ((rupdate.flags & RS_UPDATING) && rupdate.rs_rpupd)
#define RUPDATE_IS_RS_INIT_DONE() (rproc_ptr[_ENDPOINT_P(RS_PROC_NR)]->r_flags & RS_INIT_DONE)
#define RUPDATE_IS_INITIALIZING() (rupdate.flags & RS_INITIALIZING)
#define RUPDATE_IS_UPD_SCHEDULED() (rupdate.num_rpupds > 0 && !RUPDATE_IS_UPDATING())
#define RUPDATE_IS_UPD_MULTI() (rupdate.num_rpupds > 1)
#define RUPDATE_IS_UPD_VM_MULTI() (rupdate.vm_rpupd && RUPDATE_IS_UPD_MULTI())
#define SRV_IS_UPDATING(RP) ((RP)->r_flags & RS_UPDATING)
#define SRV_IS_UPDATING_AND_INITIALIZING(RP) (((RP)->r_flags & (RS_UPDATING|RS_INITIALIZING)) == (RS_UPDATING|RS_INITIALIZING))
#define UPD_INIT_MAXTIME(RPUPD) ((RPUPD)->prepare_maxtime != RS_DEFAULT_PREPARE_MAXTIME ? (RPUPD)->prepare_maxtime : RS_INIT_T)
#define UPD_IS_PREPARING_ONLY(RPUPD) ((RPUPD)->lu_flags & SEF_LU_PREPARE_ONLY)
#define SRV_IS_PREPARING_ONLY(RP) ((RP)->r_upd.rp && UPD_IS_PREPARING_ONLY(&(RP)->r_upd))
#define UPD_IS_UPD_SCHEDULED(RPUPD) (RUPDATE_IS_UPD_SCHEDULED() && (RPUPD)->rp)
#define SRV_IS_UPD_SCHEDULED(RP) UPD_IS_UPD_SCHEDULED(&(RP)->r_upd)
#endif /* RS_CONST_H */

3
minix/servers/rs/error.c
View file

@ -13,7 +13,8 @@ struct errentry {
/* Initialization errors. */
static struct errentry init_errlist[] = {
{ ENOSYS, "service does not support the requested initialization type" }
{ ENOSYS, "service does not support the requested initialization type" },
{ ERESTART, "service requested an initialization reset" }
};
static const int init_nerr = sizeof(init_errlist) / sizeof(init_errlist[0]);

179
minix/servers/rs/main.c
View file

@ -24,6 +24,10 @@ static void get_work(message *m_ptr, int *status_ptr);
/* SEF functions and variables. */
static void sef_local_startup(void);
static int sef_cb_init_fresh(int type, sef_init_info_t *info);
static int sef_cb_init_restart(int type, sef_init_info_t *info);
static int sef_cb_init_lu(int type, sef_init_info_t *info);
static int sef_cb_init_response(message *m_ptr);
static int sef_cb_lu_response(message *m_ptr);
static void sef_cb_signal_handler(int signo);
static int sef_cb_signal_manager(endpoint_t target, int signo);
@ -54,6 +58,8 @@ int main(void)
/* Main loop - get work and do it, forever. */
while (TRUE) {
/* Perform sensitive background operations when RS is idle. */
rs_idle_period();
/* Wait for request message. */
get_work(&m, &ipc_status);
@ -103,8 +109,10 @@ int main(void)
case RS_SHUTDOWN: result = do_shutdown(&m); break;
case RS_UPDATE: result = do_update(&m); break;
case RS_CLONE: result = do_clone(&m); break;
case RS_UNCLONE: result = do_unclone(&m); break;
case RS_EDIT: result = do_edit(&m); break;
case RS_GETSYSINFO: result = do_getsysinfo(&m); break;
case RS_SYSCTL: result = do_sysctl(&m); break;
case RS_GETSYSINFO: result = do_getsysinfo(&m); break;
case RS_LOOKUP: result = do_lookup(&m); break;
/* Ready messages. */
case RS_INIT: result = do_init_ready(&m); break;
@ -130,12 +138,15 @@ int main(void)
static void sef_local_startup()
{
/* Register init callbacks. */
sef_setcb_init_response(do_init_ready);
sef_setcb_init_fresh(sef_cb_init_fresh);
sef_setcb_init_restart(sef_cb_init_fail);
sef_setcb_init_restart(sef_cb_init_restart);
sef_setcb_init_lu(sef_cb_init_lu);
/* Register live update callbacks. */
sef_setcb_lu_response(do_upd_ready);
/* Register response callbacks. */
sef_setcb_init_response(sef_cb_init_response);
sef_setcb_lu_response(sef_cb_lu_response);
/* No live update support for now. */
/* Register signal callbacks. */
sef_setcb_signal_handler(sef_cb_signal_handler);
@ -155,11 +166,14 @@ static int sef_cb_init_fresh(int UNUSED(type), sef_init_info_t *UNUSED(info))
int s,i;
int nr_image_srvs, nr_image_priv_srvs, nr_uncaught_init_srvs;
struct rproc *rp;
struct rproc *replica_rp;
struct rprocpub *rpub;
struct boot_image image[NR_BOOT_PROCS];
struct boot_image_priv *boot_image_priv;
struct boot_image_sys *boot_image_sys;
struct boot_image_dev *boot_image_dev;
int pid, replica_pid;
endpoint_t replica_endpoint;
int ipc_to;
int *calls;
int all_c[] = { ALL_C, NULL_C };
@ -179,7 +193,7 @@ static int sef_cb_init_fresh(int UNUSED(type), sef_init_info_t *UNUSED(info))
}
/* Initialize some global variables. */
rupdate.flags = 0;
RUPDATE_INIT();
shutting_down = FALSE;
/* Get a copy of the boot image table. */
@ -219,8 +233,11 @@ static int sef_cb_init_fresh(int UNUSED(type), sef_init_info_t *UNUSED(info))
/* Reset the system process table. */
for (rp=BEG_RPROC_ADDR; rp<END_RPROC_ADDR; rp++) {
rp->r_flags = 0;
rp->r_init_err = ERESTART;
rp->r_pub = &rprocpub[rp - rproc];
rp->r_pub->in_use = FALSE;
rp->r_pub->old_endpoint = NONE;
rp->r_pub->new_endpoint = NONE;
}
/* Initialize the system process table in 4 steps, each of them following
@ -254,6 +271,7 @@ static int sef_cb_init_fresh(int UNUSED(type), sef_init_info_t *UNUSED(info))
/* Initialize privilege bitmaps and signal manager. */
rp->r_priv.s_flags = boot_image_priv->flags; /* priv flags */
rp->r_priv.s_init_flags = SRV_OR_USR(rp, SRV_I, USR_I); /* init flags */
rp->r_priv.s_trap_mask= SRV_OR_USR(rp, SRV_T, USR_T); /* traps */
ipc_to = SRV_OR_USR(rp, SRV_M, USR_M); /* targets */
fill_send_mask(&rp->r_priv.s_ipc_to, ipc_to == ALL_M);
@ -345,7 +363,7 @@ static int sef_cb_init_fresh(int UNUSED(type), sef_init_info_t *UNUSED(info))
/* RS/VM are already running as we speak. */
if(boot_image_priv->endpoint == RS_PROC_NR ||
boot_image_priv->endpoint == VM_PROC_NR) {
if ((s = init_service(rp, SEF_INIT_FRESH)) != OK) {
if ((s = init_service(rp, SEF_INIT_FRESH, rp->r_priv.s_init_flags)) != OK) {
panic("unable to initialize %d: %d", boot_image_priv->endpoint, s);
}
/* VM will still send an RS_INIT message, though. */
@ -367,7 +385,7 @@ static int sef_cb_init_fresh(int UNUSED(type), sef_init_info_t *UNUSED(info))
* back to us here at boot time.
*/
if(boot_image_priv->flags & SYS_PROC) {
if ((s = init_service(rp, SEF_INIT_FRESH)) != OK) {
if ((s = init_service(rp, SEF_INIT_FRESH, rp->r_priv.s_init_flags)) != OK) {
panic("unable to initialize service: %d", s);
}
if(rpub->sys_flags & SF_SYNCH_BOOT) {
@ -440,7 +458,7 @@ static int sef_cb_init_fresh(int UNUSED(type), sef_init_info_t *UNUSED(info))
/* New RS instance running. */
/* Live update the old instance into the new one. */
s = update_service(&rp, &replica_rp, RS_SWAP);
s = update_service(&rp, &replica_rp, RS_SWAP, 0);
if(s != OK) {
panic("unable to live update RS: %d", s);
}
@ -450,7 +468,7 @@ static int sef_cb_init_fresh(int UNUSED(type), sef_init_info_t *UNUSED(info))
cleanup_service(rp);
/* Ask VM to pin memory for the new RS instance. */
if((s = vm_memctl(RS_PROC_NR, VM_RS_MEM_PIN)) != OK) {
if((s = vm_memctl(RS_PROC_NR, VM_RS_MEM_PIN, 0, 0)) != OK) {
panic("unable to pin memory for the new RS instance: %d", s);
}
}
@ -476,6 +494,138 @@ static int sef_cb_init_fresh(int UNUSED(type), sef_init_info_t *UNUSED(info))
return(OK);
}
/*===========================================================================*
* sef_cb_init_restart *
*===========================================================================*/
static int sef_cb_init_restart(int type, sef_init_info_t *info)
{
/* Restart the reincarnation server. */
int r;
struct rproc *old_rs_rp, *new_rs_rp;
assert(info->endpoint == RS_PROC_NR);
/* Perform default state transfer first. */
r = SEF_CB_INIT_RESTART_DEFAULT(type, info);
if(r != OK) {
printf("SEF_CB_INIT_RESTART_DEFAULT failed: %d\n", r);
return r;
}
/* New RS takes over. */
old_rs_rp = rproc_ptr[_ENDPOINT_P(RS_PROC_NR)];
new_rs_rp = rproc_ptr[_ENDPOINT_P(info->old_endpoint)];
if(rs_verbose)
printf("RS: %s is the new RS after restart\n", srv_to_string(new_rs_rp));
/* If an update was in progress, end it. */
if(SRV_IS_UPDATING(old_rs_rp)) {
end_update(ERESTART, RS_REPLY);
}
/* Update the service into the replica. */
r = update_service(&old_rs_rp, &new_rs_rp, RS_DONTSWAP, 0);
if(r != OK) {
printf("update_service failed: %d\n", r);
return r;
}
/* Initialize the new RS instance. */
r = init_service(new_rs_rp, SEF_INIT_RESTART, 0);
if(r != OK) {
printf("init_service failed: %d\n", r);
return r;
}
/* Reschedule a synchronous alarm for the next period. */
if (OK != (r=sys_setalarm(RS_DELTA_T, 0)))
panic("couldn't set alarm: %d", r);
return OK;
}
/*===========================================================================*
* sef_cb_init_lu *
*===========================================================================*/
static int sef_cb_init_lu(int type, sef_init_info_t *info)
{
/* Start a new version of the reincarnation server. */
int r;
struct rproc *old_rs_rp, *new_rs_rp;
assert(info->endpoint == RS_PROC_NR);
/* Perform default state transfer first. */
sef_setcb_init_restart(SEF_CB_INIT_RESTART_DEFAULT);
r = SEF_CB_INIT_LU_DEFAULT(type, info);
if(r != OK) {
printf("SEF_CB_INIT_LU_DEFAULT failed: %d\n", r);
return r;
}
/* New RS takes over. */
old_rs_rp = rproc_ptr[_ENDPOINT_P(RS_PROC_NR)];
new_rs_rp = rproc_ptr[_ENDPOINT_P(info->old_endpoint)];
if(rs_verbose)
printf("RS: %s is the new RS after live update\n",
srv_to_string(new_rs_rp));
/* Update the service into the replica. */
r = update_service(&old_rs_rp, &new_rs_rp, RS_DONTSWAP, 0);
if(r != OK) {
printf("update_service failed: %d\n", r);
return r;
}
/* Check if everything is as expected. */
assert(RUPDATE_IS_UPDATING());
assert(RUPDATE_IS_INITIALIZING());
assert(rupdate.num_rpupds > 0);
assert(rupdate.num_init_ready_pending > 0);
return OK;
}
/*===========================================================================*
* sef_cb_init_response *
*===========================================================================*/
int sef_cb_init_response(message *m_ptr)
{
int r;
/* Return now if RS initialization failed. */
r = m_ptr->m_rs_init.result;
if(r != OK) {
return r;
}
/* Simulate an RS-to-RS init message. */
r = do_init_ready(m_ptr);
/* Assume everything is OK if EDONTREPLY was returned. */
if(r == EDONTREPLY) {
r = OK;
}
return r;
}
/*===========================================================================*
* sef_cb_lu_response *
*===========================================================================*/
int sef_cb_lu_response(message *m_ptr)
{
int r;
/* Simulate an RS-to-RS update ready message. */
r = do_upd_ready(m_ptr);
/* If we get this far, we didn't get updated for some reason. Report error. */
if(r == EDONTREPLY) {
r = EGENERIC;
}
return r;
}
/*===========================================================================*
* sef_cb_signal_handler *
*===========================================================================*/
@ -500,7 +650,6 @@ static int sef_cb_signal_manager(endpoint_t target, int signo)
/* Process system signal on behalf of the kernel. */
int target_p;
struct rproc *rp;
struct rprocpub *rpub;
message m;
/* Lookup slot. */
@ -511,7 +660,6 @@ static int sef_cb_signal_manager(endpoint_t target, int signo)
return OK; /* clear the signal */
}
rp = rproc_ptr[target_p];
rpub = rp->r_pub;
/* Don't bother if a termination signal has already been processed. */
if((rp->r_flags & RS_TERMINATED) && !(rp->r_flags & RS_EXITING)) {
@ -539,14 +687,19 @@ static int sef_cb_signal_manager(endpoint_t target, int signo)
if(SIGS_IS_TERMINATION(signo)) {
rp->r_flags |= RS_TERMINATED;
terminate_service(rp);
rs_idle_period();
return EDEADEPT; /* process is now gone */
}
/* Never deliver signals to VM. */
if (rp->r_pub->endpoint == VM_PROC_NR) {
return OK;
}
/* Translate every non-termination signal into a message. */
m.m_type = SIGS_SIGNAL_RECEIVED;
m.m_pm_lsys_sigs_signal.num = signo;
asynsend3(rpub->endpoint, &m, AMF_NOREPLY);
rs_asynsend(rp, &m, 1);
return OK; /* signal has been delivered */
}

678
minix/servers/rs/manager.c
View file

@ -13,6 +13,8 @@
#include "kernel/proc.h"
static int run_script(struct rproc *rp);
/*===========================================================================*
* caller_is_root *
*===========================================================================*/
@ -102,9 +104,14 @@ struct rproc *rp;
if(call != RS_EDIT) return EPERM;
}
/* Disallow the call if an update is in progress. */
if(RUPDATE_IS_UPDATING()) {
return EBUSY;
}
/* Disallow the call if another call is in progress for the service. */
if((rp->r_flags & RS_LATEREPLY)
|| (rp->r_flags & RS_INITIALIZING) || (rp->r_flags & RS_UPDATING)) {
|| (rp->r_flags & RS_INITIALIZING)) {
return EBUSY;
}
@ -161,6 +168,121 @@ size_t dst_len;
return OK;
}
/*===========================================================================*
* init_state_data *
*===========================================================================*/
int init_state_data(endpoint_t src_e, int prepare_state,
struct rs_state_data *src_rs_state_data,
struct rs_state_data *dst_rs_state_data)
{
int s, i, j, num_ipc_filters = 0;
struct rs_ipc_filter_el (*rs_ipc_filter_els)[IPCF_MAX_ELEMENTS];
struct rs_ipc_filter_el rs_ipc_filter[IPCF_MAX_ELEMENTS];
size_t rs_ipc_filter_size = sizeof(rs_ipc_filter);
ipc_filter_el_t (*ipcf_els_buff)[IPCF_MAX_ELEMENTS];
size_t ipcf_els_buff_size;
dst_rs_state_data->size = 0;
dst_rs_state_data->eval_addr = NULL;
dst_rs_state_data->eval_len = 0;
dst_rs_state_data->ipcf_els = NULL;
dst_rs_state_data->ipcf_els_size = 0;
if(src_rs_state_data->size != sizeof(struct rs_state_data)) {
return E2BIG;
}
/* Initialize eval expression. */
if(prepare_state == SEF_LU_STATE_EVAL) {
if(src_rs_state_data->eval_len == 0 || !src_rs_state_data->eval_addr) {
return EINVAL;
}
dst_rs_state_data->eval_addr = malloc(src_rs_state_data->eval_len+1);
dst_rs_state_data->eval_len = src_rs_state_data->eval_len;
if(!dst_rs_state_data->eval_addr) {
return ENOMEM;
}
s = sys_datacopy(src_e, (vir_bytes) src_rs_state_data->eval_addr,
SELF, (vir_bytes) dst_rs_state_data->eval_addr,
dst_rs_state_data->eval_len);
if(s != OK) {
return s;
}
*((char*)dst_rs_state_data->eval_addr + dst_rs_state_data->eval_len) = '\0';
dst_rs_state_data->size = src_rs_state_data->size;
}
/* Initialize ipc filters. */
if(src_rs_state_data->ipcf_els_size % rs_ipc_filter_size) {
return E2BIG;
}
rs_ipc_filter_els = src_rs_state_data->ipcf_els;
num_ipc_filters = src_rs_state_data->ipcf_els_size / rs_ipc_filter_size;
if(!rs_ipc_filter_els) {
return OK;
}
ipcf_els_buff_size = sizeof(ipc_filter_el_t)*IPCF_MAX_ELEMENTS*num_ipc_filters;
if(src_e == VM_PROC_NR) {
ipcf_els_buff_size += sizeof(ipc_filter_el_t)*IPCF_MAX_ELEMENTS;
}
ipcf_els_buff = malloc(ipcf_els_buff_size);
if(!ipcf_els_buff) {
return ENOMEM;
}
memset(ipcf_els_buff, 0, ipcf_els_buff_size);
for(i=0;i<num_ipc_filters;i++) {
s = sys_datacopy(src_e, (vir_bytes) rs_ipc_filter_els[i],
SELF, (vir_bytes) rs_ipc_filter, rs_ipc_filter_size);
if(s != OK) {
return s;
}
for(j=0;j<IPCF_MAX_ELEMENTS && rs_ipc_filter[j].flags;j++) {
endpoint_t m_source = 0;
int m_type = 0;
int flags = rs_ipc_filter[j].flags;
if(flags & IPCF_MATCH_M_TYPE) {
m_type = rs_ipc_filter[j].m_type;
}
if(flags & IPCF_MATCH_M_SOURCE) {
if(ds_retrieve_label_endpt(rs_ipc_filter[j].m_label,&m_source) != OK) {
/* try to see if an endpoint was provided as label */
char *buff;
if(!strcmp("ANY_USR", rs_ipc_filter[j].m_label)) {
m_source = ANY_USR;
}
else if(!strcmp("ANY_SYS", rs_ipc_filter[j].m_label)) {
m_source = ANY_SYS;
}
else if(!strcmp("ANY_TSK", rs_ipc_filter[j].m_label)) {
m_source = ANY_TSK;
}
else {
errno=0;
m_source = strtol(rs_ipc_filter[j].m_label, &buff, 10);
if(errno || strcmp(buff, "")) {
return ESRCH;
}
}
}
}
ipcf_els_buff[i][j].flags = flags;
ipcf_els_buff[i][j].m_source = m_source;
ipcf_els_buff[i][j].m_type = m_type;
}
}
if(src_e == VM_PROC_NR) {
/* Make sure VM can still talk to us at update time. */
ipcf_els_buff[i][0].flags = (IPCF_EL_WHITELIST|IPCF_MATCH_M_SOURCE|IPCF_MATCH_M_TYPE);
ipcf_els_buff[i][0].m_source = RS_PROC_NR;
ipcf_els_buff[i][0].m_type = VM_RS_UPDATE;
}
dst_rs_state_data->size = src_rs_state_data->size;
dst_rs_state_data->ipcf_els = ipcf_els_buff;
dst_rs_state_data->ipcf_els_size = ipcf_els_buff_size;
return OK;
}
/*===========================================================================*
* build_cmd_dep *
*===========================================================================*/
@ -213,122 +335,35 @@ void build_cmd_dep(struct rproc *rp)
}
/*===========================================================================*
* srv_update *
* end_srv_init *
*===========================================================================*/
int srv_update(endpoint_t src_e, endpoint_t dst_e)
void end_srv_init(struct rproc *rp)
{
int r;
int sys_upd_flags = 0;
/* Ask VM to swap the slots of the two processes and tell the kernel to
* do the same. If VM is the service being updated, only perform the kernel
* part of the call. The new instance of VM will do the rest at
* initialization time.
*/
if(src_e != VM_PROC_NR) {
r = vm_update(src_e, dst_e, sys_upd_flags);
}
else {
r = sys_update(src_e, dst_e, sys_upd_flags);
}
return r;
}
/*===========================================================================*
* update_period *
*===========================================================================*/
void update_period(message *m_ptr)
{
clock_t now = m_ptr->m_notify.timestamp;
short has_update_timed_out;
message m;
struct rprocpub *rpub;
int r;
rpub = rupdate.rp->r_pub;
rpub = rp->r_pub;
/* See if a timeout has occurred. */
has_update_timed_out = (now - rupdate.prepare_tm > rupdate.prepare_maxtime);
/* See if a late reply has to be sent. */
late_reply(rp, OK);
/* If an update timed out, end the update process and notify
* the old version that the update has been canceled. From now on, the old
* version will continue executing.
/* If the service has completed initialization after a crash
* make the new instance active and cleanup the old replica.
* If the service was part of a scheduled update, schedule the new
* replica for the same update.
*/
if(has_update_timed_out) {
printf("RS: update failed: maximum prepare time reached\n");
end_update(EINTR, RS_DONTREPLY);
/* Prepare cancel request. */
m.m_type = RS_LU_PREPARE;
m.m_rs_update.state = SEF_LU_STATE_NULL;
if(rpub->endpoint == RS_PROC_NR) {
/* RS can process the request directly. */
do_sef_lu_request(&m);
}
else {
/* Send request message to the system service. */
asynsend(rpub->endpoint, &m);
if(rp->r_prev_rp) {
if(SRV_IS_UPD_SCHEDULED(rp->r_prev_rp)) {
rupdate_upd_move(rp->r_prev_rp, rp);
}
cleanup_service(rp->r_prev_rp);
rp->r_prev_rp = NULL;
rp->r_restarts += 1;
if(rs_verbose)
printf("RS: %s completed restart\n", srv_to_string(rp));
}
}
/*===========================================================================*
* end_update *
*===========================================================================*/
void end_update(int result, int reply_flag)
{
/* End the update process. There are two possibilities:
* 1) the update succeeded. In that case, cleanup the old version and mark the
* new version as no longer under update.
* 2) the update failed. In that case, cleanup the new version and mark the old
* version as no longer under update. Eventual late ready to update
* messages (if any) will simply be ignored and the service can
* continue executing. In addition, reset the check timestamp, so that if the
* service has a period, a status request will be forced in the next period.
*/
struct rproc *old_rp, *new_rp, *exiting_rp, *surviving_rp;
struct rproc **rps;
int nr_rps, i;
old_rp = rupdate.rp;
new_rp = old_rp->r_new_rp;
if(rs_verbose)
printf("RS: ending update from %s to %s with result: %d\n",
srv_to_string(old_rp), srv_to_string(new_rp), result);
/* Decide which version has to die out and which version has to survive. */
surviving_rp = (result == OK ? new_rp : old_rp);
exiting_rp = (result == OK ? old_rp : new_rp);
/* End update. */
rupdate.flags &= ~RS_UPDATING;
rupdate.rp = NULL;
old_rp->r_new_rp = NULL;
new_rp->r_old_rp = NULL;
old_rp->r_check_tm = 0;
/* Send a late reply if necessary. */
late_reply(old_rp, result);
/* Mark the version that has to survive as no longer updating and
* reply when asked to.
*/
surviving_rp->r_flags &= ~RS_UPDATING;
if(reply_flag == RS_REPLY) {
message m;
m.m_type = result;
reply(surviving_rp->r_pub->endpoint, surviving_rp, &m);
}
/* Cleanup the version that has to die out. */
get_service_instances(exiting_rp, &rps, &nr_rps);
for(i=0;i<nr_rps;i++) {
cleanup_service(rps[i]);
}
if(rs_verbose)
printf("RS: %s ended the update\n", srv_to_string(surviving_rp));
rp->r_next_rp = NULL;
}
/*===========================================================================*
@ -385,30 +420,120 @@ int line;
struct rproc *rp;
{
struct rprocpub *rpub;
int detach, cleanup_script;
int s;
rpub = rp->r_pub;
if(rs_verbose)
printf("RS: %s cleaned up at %s:%d\n", srv_to_string(rp),
file, line);
if(!(rp->r_flags & RS_DEAD)) {
if(rs_verbose)
printf("RS: %s marked for cleanup at %s:%d\n", srv_to_string(rp),
file, line);
/* Tell scheduler this process is finished */
if ((s = sched_stop(rp->r_scheduler, rpub->endpoint)) != OK) {
printf("RS: warning: scheduler won't give up process: %d\n", s);
/* Unlink service the first time. */
if(rp->r_next_rp) {
rp->r_next_rp->r_prev_rp = NULL;
rp->r_next_rp = NULL;
}
if(rp->r_prev_rp) {
rp->r_prev_rp->r_next_rp = NULL;
rp->r_prev_rp = NULL;
}
if(rp->r_new_rp) {
rp->r_new_rp->r_old_rp = NULL;
rp->r_new_rp = NULL;
}
if(rp->r_old_rp) {
rp->r_old_rp->r_new_rp = NULL;
rp->r_old_rp = NULL;
}
rp->r_flags |= RS_DEAD;
/* Make sure the service can no longer run and unblock IPC callers. */
sys_privctl(rpub->endpoint, SYS_PRIV_DISALLOW, NULL);
sys_privctl(rpub->endpoint, SYS_PRIV_CLEAR_IPC_REFS, NULL);
rp->r_flags &= ~RS_ACTIVE;
/* Send a late reply if there is any pending. */
late_reply(rp, OK);
return;
}
/* Ask PM to exit the service */
if(rp->r_pid == -1) {
printf("RS: warning: attempt to kill pid -1!\n");
cleanup_script = rp->r_flags & RS_CLEANUP_SCRIPT;
detach = rp->r_flags & RS_CLEANUP_DETACH;
/* Cleanup the service when not detaching. */
if(!detach) {
if(rs_verbose)
printf("RS: %s cleaned up at %s:%d\n", srv_to_string(rp),
file, line);
/* Tell scheduler this process is finished */
if ((s = sched_stop(rp->r_scheduler, rpub->endpoint)) != OK) {
printf("RS: warning: scheduler won't give up process: %d\n", s);
}
/* Ask PM to exit the service */
if(rp->r_pid == -1) {
printf("RS: warning: attempt to kill pid -1!\n");
}
else {
srv_kill(rp->r_pid, SIGKILL);
}
}
/* See if we need to run a script now. */
if(cleanup_script) {
rp->r_flags &= ~RS_CLEANUP_SCRIPT;
s = run_script(rp);
if(s != OK) {
printf("RS: warning: cannot run cleanup script: %d\n", s);
}
}
if(detach) {
/* Detach service when asked to. */
detach_service(rp);
}
else {
srv_kill(rp->r_pid, SIGKILL);
/* Free slot otherwise, unless we're about to reuse it */
if (!(rp->r_flags & RS_REINCARNATE))
free_slot(rp);
}
}
/* Free slot, unless we're about to reuse it */
if (!(rp->r_flags & RS_REINCARNATE))
free_slot(rp);
/*===========================================================================*
* detach_service_debug *
*===========================================================================*/
void detach_service_debug(file, line, rp)
char *file;
int line;
struct rproc *rp;
{
/* Detach the given system service. */
static unsigned long detach_counter = 0;
char label[RS_MAX_LABEL_LEN];
struct rprocpub *rpub;
rpub = rp->r_pub;
/* Publish a new unique label for the system service. */
rpub->label[RS_MAX_LABEL_LEN-1] = '\0';
strcpy(label, rpub->label);
snprintf(rpub->label, RS_MAX_LABEL_LEN, "%lu.%s", ++detach_counter, label);
ds_publish_label(rpub->label, rpub->endpoint, DSF_OVERWRITE);
if(rs_verbose)
printf("RS: %s detached at %s:%d\n", srv_to_string(rp),
file, line);
/* Allow the service to run. */
rp->r_flags = RS_IN_USE | RS_ACTIVE;
rpub->sys_flags &= ~(SF_CORE_SRV|SF_DET_RESTART);
rp->r_period = 0;
rpub->dev_nr = 0;
sys_privctl(rpub->endpoint, SYS_PRIV_ALLOW, NULL);
}
/*===========================================================================*
@ -495,7 +620,7 @@ struct rproc *rp;
if ((s = sched_init_proc(rp)) != OK) {
printf("RS: unable to start scheduling: %d\n", s);
cleanup_service(rp);
vm_memctl(RS_PROC_NR, VM_RS_MEM_PIN,0,0);
vm_memctl(RS_PROC_NR, VM_RS_MEM_PIN, 0, 0);
return s;
}
@ -529,8 +654,37 @@ struct rproc *rp;
free_exec(rp);
}
/* The purpose of non-blocking forks is to avoid involving VFS in the forking
* process, because VFS may be blocked on a sendrec() to a MFS that is
* waiting for a endpoint update for a dead driver. We have just published
* that update, but VFS may still be blocked. As a result, VFS may not yet
* have received PM's fork message. Hence, if we call mapdriver()
* immediately, VFS may not know about the process and thus refuse to add the
* driver entry. The following temporary hack works around this by forcing
* blocking communication from PM to VFS. Once VFS has been made non-blocking
* towards MFS instances, this hack and the big part of srv_fork() can go.
*/
setuid(0);
/* If this is a RS instance, pin memory. */
if(rp->r_priv.s_flags & ROOT_SYS_PROC) {
if(rs_verbose)
printf("RS: pinning memory of RS instance %s\n", srv_to_string(rp));
s = vm_memctl(rpub->endpoint, VM_RS_MEM_PIN, 0, 0);
if(s != OK) {
printf("vm_memctl failed: %d\n", s);
cleanup_service(rp);
return s;
}
}
/* If this is a VM instance, let VM know now. */
if(rp->r_priv.s_flags & VM_SYS_PROC) {
struct rproc *rs_rp;
struct rproc **rs_rps;
int i, nr_rs_rps;
if(rs_verbose)
printf("RS: informing VM of instance %s\n", srv_to_string(rp));
@ -540,6 +694,15 @@ struct rproc *rp;
cleanup_service(rp);
return s;
}
/* VM may start actually pinning memory for us only now.
* Ask again for all our instances.
*/
rs_rp = rproc_ptr[_ENDPOINT_P(RS_PROC_NR)];
get_service_instances(rs_rp, &rs_rps, &nr_rs_rps);
for(i=0;i<nr_rs_rps;i++) {
vm_memctl(rs_rps[i]->r_pub->endpoint, VM_RS_MEM_PIN, 0, 0);
}
}
/* Tell VM about allowed calls. */
@ -558,9 +721,7 @@ struct rproc *rp;
/*===========================================================================*
* clone_service *
*===========================================================================*/
int clone_service(rp, instance_flag)
struct rproc *rp;
int instance_flag;
int clone_service(struct rproc *rp, int instance_flag, int init_flags)
{
/* Clone the given system service instance. */
struct rproc *replica_rp;
@ -572,7 +733,16 @@ int instance_flag;
int r;
if(rs_verbose)
printf("RS: creating a replica for %s\n", srv_to_string(rp));
printf("RS: %s creating a replica\n", srv_to_string(rp));
/* VM can only reliably support one replica at the time for now.
* XXX TO-DO: Fix VM's rs_memctl_make_vm_instance to allow multiple replicas.
*/
if(rp->r_pub->endpoint == VM_PROC_NR && instance_flag == LU_SYS_PROC
&& rp->r_next_rp) {
cleanup_service_now(rp->r_next_rp);
rp->r_next_rp = NULL;
}
/* Clone slot. */
if((r = clone_slot(rp, &replica_rp)) != OK) {
@ -590,6 +760,7 @@ int instance_flag;
replica_link = &replica_rp->r_prev_rp;
}
replica_rp->r_priv.s_flags |= instance_flag;
replica_rp->r_priv.s_init_flags |= init_flags;
/* Link the two slots. */
*rp_link = replica_rp;
@ -737,7 +908,7 @@ struct rproc *rp; /* pointer to service slot */
r = ds_retrieve_label_endpt("devman",&ep);
if (r != OK) {
printf("RS: devman not running?");
printf("RS: devman not running?");
} else {
m.m_type = DEVMAN_UNBIND;
m.DEVMAN_ENDPOINT = rpub->endpoint;
@ -759,9 +930,7 @@ struct rproc *rp; /* pointer to service slot */
/*===========================================================================*
* run_service *
*===========================================================================*/
int run_service(rp, init_type)
struct rproc *rp;
int init_type;
int run_service(struct rproc *rp, int init_type, int init_flags)
{
/* Let a newly created service run. */
struct rprocpub *rpub;
@ -775,7 +944,7 @@ int init_type;
}
/* Initialize service. */
if((s = init_service(rp, init_type)) != OK) {
if((s = init_service(rp, init_type, init_flags)) != OK) {
return kill_service(rp, "unable to initialize service", s);
}
@ -788,16 +957,16 @@ int init_type;
/*===========================================================================*
* start_service *
*===========================================================================*/
int start_service(rp)
struct rproc *rp;
int start_service(struct rproc *rp, int init_flags)
{
/* Start a system service. */
int r, init_type;
int r;
struct rprocpub *rpub;
rpub = rp->r_pub;
/* Create and make active. */
rp->r_priv.s_init_flags |= init_flags;
r = create_service(rp);
if(r != OK) {
return r;
@ -811,8 +980,7 @@ struct rproc *rp;
}
/* Run. */
init_type = SEF_INIT_FRESH;
r = run_service(rp, init_type);
r = run_service(rp, SEF_INIT_FRESH, init_flags);
if(r != OK) {
return r;
}
@ -849,66 +1017,6 @@ void stop_service(struct rproc *rp,int how)
getticks(&rp->r_stop_tm); /* record current time */
}
/*===========================================================================*
* update_service *
*===========================================================================*/
int update_service(src_rpp, dst_rpp, swap_flag)
struct rproc **src_rpp;
struct rproc **dst_rpp;
int swap_flag;
{
/* Update an existing service. */
int r;
struct rproc *src_rp;
struct rproc *dst_rp;
struct rprocpub *src_rpub;
struct rprocpub *dst_rpub;
int pid;
endpoint_t endpoint;
src_rp = *src_rpp;
dst_rp = *dst_rpp;
src_rpub = src_rp->r_pub;
dst_rpub = dst_rp->r_pub;
if(rs_verbose)
printf("RS: %s updating into %s\n",
srv_to_string(src_rp), srv_to_string(dst_rp));
/* Swap the slots of the two processes when asked to. */
if(swap_flag == RS_SWAP) {
if((r = srv_update(src_rpub->endpoint, dst_rpub->endpoint)) != OK) {
return r;
}
}
/* Swap slots here as well. */
pid = src_rp->r_pid;
endpoint = src_rpub->endpoint;
swap_slot(&src_rp, &dst_rp);
/* Reassign pids and endpoints. */
src_rp->r_pid = dst_rp->r_pid;
src_rp->r_pub->endpoint = dst_rp->r_pub->endpoint;
rproc_ptr[_ENDPOINT_P(src_rp->r_pub->endpoint)] = src_rp;
dst_rp->r_pid = pid;
dst_rp->r_pub->endpoint = endpoint;
rproc_ptr[_ENDPOINT_P(dst_rp->r_pub->endpoint)] = dst_rp;
/* Adjust input pointers. */
*src_rpp = src_rp;
*dst_rpp = dst_rp;
/* Make the new version active. */
activate_service(dst_rp, src_rp);
if(rs_verbose)
printf("RS: %s updated into %s\n",
srv_to_string(src_rp), srv_to_string(dst_rp));
return OK;
}
/*===========================================================================*
* activate_service *
*===========================================================================*/
@ -932,35 +1040,23 @@ void activate_service(struct rproc *rp, struct rproc *ex_rp)
/*===========================================================================*
* reincarnate_service *
*===========================================================================*/
void reincarnate_service(struct rproc *rp)
void reincarnate_service(struct rproc *old_rp)
{
/* Restart a service as if it were never started before. */
struct rprocpub *rpub;
int i;
struct rproc *rp;
int r, restarts;
rpub = rp->r_pub;
if ((r = clone_slot(old_rp, &rp)) != OK) {
printf("RS: Failed to clone the slot: %d\n", r);
return;
}
rp->r_flags &= RS_IN_USE;
rp->r_pid = -1;
rproc_ptr[_ENDPOINT_P(rpub->endpoint)] = NULL;
rp->r_flags = RS_IN_USE;
rproc_ptr[_ENDPOINT_P(rp->r_pub->endpoint)] = NULL;
/* Restore original IRQ and I/O range tables in the priv struct. This is the
* only part of the privilege structure that can be modified by processes
* other than RS itself.
*/
rp->r_priv.s_nr_irq = rp->r_nr_irq;
for (i = 0; i < rp->r_nr_irq; i++)
rp->r_priv.s_irq_tab[i] = rp->r_irq_tab[i];
rp->r_priv.s_nr_io_range = rp->r_nr_io_range;
for (i = 0; i < rp->r_nr_io_range; i++)
rp->r_priv.s_io_tab[i] = rp->r_io_tab[i];
rp->r_old_rp = NULL;
rp->r_new_rp = NULL;
rp->r_prev_rp = NULL;
rp->r_next_rp = NULL;
start_service(rp);
restarts = rp->r_restarts;
start_service(rp, SEF_INIT_FRESH);
rp->r_restarts = restarts + 1;
}
/*===========================================================================*
@ -971,7 +1067,7 @@ void terminate_service(struct rproc *rp)
/* Handle a termination event for a system service. */
struct rproc **rps;
struct rprocpub *rpub;
int nr_rps;
int nr_rps, norestart;
int i, r;
rpub = rp->r_pub;
@ -981,6 +1077,14 @@ void terminate_service(struct rproc *rp)
/* Deal with failures during initialization. */
if(rp->r_flags & RS_INITIALIZING) {
/* If updating, rollback. */
if(SRV_IS_UPDATING(rp)) {
printf("RS: update failed: state transfer failed. Rolling back...\n");
end_update(rp->r_init_err, RS_REPLY);
rp->r_init_err = ERESTART;
return;
}
if (rpub->sys_flags & SF_NO_BIN_EXP) {
/* If service was deliberately started with binary exponential offset
* disabled, we're going to assume we want to refresh a service upon
@ -993,33 +1097,51 @@ void terminate_service(struct rproc *rp)
} else {
if(rs_verbose)
printf("RS: service '%s' exited during initialization; "
"not restarting\n", rpub->label);
"exiting\n", rpub->label);
rp->r_flags |= RS_EXITING; /* don't restart. */
}
}
/* If updating, rollback. */
if(rp->r_flags & RS_UPDATING) {
struct rproc *old_rp, *new_rp;
printf("RS: update failed: state transfer failed. Rolling back...\n");
new_rp = rp;
old_rp = new_rp->r_old_rp;
new_rp->r_flags &= ~RS_INITIALIZING;
r = update_service(&new_rp, &old_rp, RS_SWAP);
assert(r == OK); /* can't fail */
end_update(ERESTART, RS_REPLY);
return;
/* If an update process is in progress, end it before doing anything else.
* This is to be on the safe side, since there may be some weird dependencies
* with services under update, while we perform recovery actions.
*/
if(RUPDATE_IS_UPDATING()) {
printf("RS: aborting the update after a crash...\n");
abort_update_proc(ERESTART);
}
/* Force exit when no restart is requested. */
norestart = !(rp->r_flags & RS_EXITING) && (rp->r_pub->sys_flags & SF_NORESTART);
if(norestart) {
rp->r_flags |= RS_EXITING;
if((rp->r_pub->sys_flags & SF_DET_RESTART)
&& (rp->r_restarts < MAX_DET_RESTART)) {
/* Detach at cleanup time. */
rp->r_flags |= RS_CLEANUP_DETACH;
}
if(rp->r_script[0] != '\0') {
/* Run script at cleanup time. */
rp->r_flags |= RS_CLEANUP_SCRIPT;
}
}
if (rp->r_flags & RS_EXITING) {
/* If a core system service is exiting, we are in trouble. */
if (rp->r_pub->sys_flags & SF_CORE_SRV && !shutting_down) {
if ((rp->r_pub->sys_flags & SF_CORE_SRV) && !shutting_down) {
printf("core system service died: %s\n", srv_to_string(rp));
_exit(1);
}
/* If this service was scheduled for the update, abort the update now. */
if(SRV_IS_UPD_SCHEDULED(rp)) {
printf("RS: aborting the scheduled update, one of the services part of it is exiting...\n");
abort_update_proc(EDEADSRCDST);
}
/* See if a late reply has to be sent. */
r = (rp->r_caller_request == RS_DOWN ? OK : EDEADEPT);
r = (rp->r_caller_request == RS_DOWN
|| (rp->r_caller_request == RS_REFRESH && norestart) ? OK : EDEADEPT);
late_reply(rp, r);
/* Unpublish the service. */
@ -1036,6 +1158,7 @@ void terminate_service(struct rproc *rp)
* If this fails, start_service() itself will perform cleanup.
*/
if (rp->r_flags & RS_REINCARNATE) {
rp->r_flags &= ~RS_REINCARNATE;
reincarnate_service(rp);
}
}
@ -1044,13 +1167,6 @@ void terminate_service(struct rproc *rp)
restart_service(rp);
}
else {
/* If an update is in progress, end it. The old version
* that just exited will continue executing.
*/
if(rp->r_flags & RS_UPDATING) {
end_update(ERESTART, RS_DONTREPLY);
}
/* Determine what to do. If this is the first unexpected
* exit, immediately restart this service. Otherwise use
* a binary exponential backoff.
@ -1104,7 +1220,7 @@ static int run_script(struct rproc *rp)
switch(pid)
{
case -1:
return kill_service(rp, "unable to fork script", errno);
return errno;
case 0:
execle(_PATH_BSHELL, "sh", rp->r_script, rpub->label, reason,
incarnation_str, (char*) NULL, envp);
@ -1146,25 +1262,19 @@ void restart_service(struct rproc *rp)
/* See if a late reply has to be sent. */
late_reply(rp, OK);
/* This hack disables restarting of file servers, which at the moment always
* cause VFS to hang indefinitely. As soon as VFS no longer blocks on calls
* to file servers, this exception can be removed again.
*/
if (!strncmp(rp->r_pub->label, "fs_", 3)) {
kill_service(rp, "file servers cannot be restarted yet", ENOSYS);
return;
}
/* Run a recovery script if available. */
if (rp->r_script[0] != '\0') {
run_script(rp);
r = run_script(rp);
if(r != OK) {
kill_service(rp, "unable to run script", errno);
}
return;
}
/* Restart directly. We need a replica if not already available. */
if(rp->r_next_rp == NULL) {
/* Create the replica. */
r = clone_service(rp, RST_SYS_PROC);
r = clone_service(rp, RST_SYS_PROC, 0);
if(r != OK) {
kill_service(rp, "unable to clone service", r);
return;
@ -1173,19 +1283,25 @@ void restart_service(struct rproc *rp)
replica_rp = rp->r_next_rp;
/* Update the service into the replica. */
r = update_service(&rp, &replica_rp, RS_SWAP);
r = update_service(&rp, &replica_rp, RS_SWAP, 0);
if(r != OK) {
kill_service(rp, "unable to update into new replica", r);
return;
}
/* Let the new replica run. */
r = run_service(replica_rp, SEF_INIT_RESTART);
r = run_service(replica_rp, SEF_INIT_RESTART, 0);
if(r != OK) {
kill_service(rp, "unable to let the replica run", r);
return;
}
/* See if the old version needs to be detached. */
if((rp->r_pub->sys_flags & SF_DET_RESTART)
&& (rp->r_restarts < MAX_DET_RESTART)) {
rp->r_flags |= RS_CLEANUP_DETACH;
}
if(rs_verbose)
printf("RS: %s restarted into %s\n",
srv_to_string(rp), srv_to_string(replica_rp));
@ -1499,11 +1615,13 @@ endpoint_t source;
/* Update recovery script. */
if (rs_start->rss_scriptlen > MAX_SCRIPT_LEN-1) return(E2BIG);
if (rs_start->rss_script != NULL && !(rpub->sys_flags & SF_CORE_SRV)) {
if (rs_start->rss_script != NULL && rs_start->rss_scriptlen > 0
&& !(rpub->sys_flags & SF_CORE_SRV)) {
s=sys_datacopy(source, (vir_bytes) rs_start->rss_script,
SELF, (vir_bytes) rp->r_script, rs_start->rss_scriptlen);
if (s != OK) return(s);
rp->r_script[rs_start->rss_scriptlen] = '\0';
rpub->sys_flags |= SF_USE_SCRIPT;
}
/* Update system flags and in-memory copy. */
@ -1518,9 +1636,6 @@ endpoint_t source;
for(i = 0; i < NR_SYS_PROCS; i++) {
rp2 = &rproc[i];
if (!(rp2->r_flags & RS_IN_USE)) {
continue;
}
rpub2 = rproc[i].r_pub;
if(strcmp(rpub->proc_name, rpub2->proc_name) == 0 &&
(rpub2->sys_flags & SF_USE_COPY)) {
@ -1549,12 +1664,32 @@ endpoint_t source;
if (rs_start->rss_flags & RSS_NO_BIN_EXP) {
rpub->sys_flags |= SF_NO_BIN_EXP;
}
if (rs_start->rss_flags & RSS_DETACH) {
rpub->sys_flags |= SF_DET_RESTART;
}
else {
rpub->sys_flags &= ~SF_DET_RESTART;
}
if (rs_start->rss_flags & RSS_NORESTART) {
if(rpub->sys_flags & SF_CORE_SRV) {
return EPERM;
}
rpub->sys_flags |= SF_NORESTART;
}
else {
rpub->sys_flags &= ~SF_NORESTART;
}
/* Update period. */
if(rpub->endpoint != RS_PROC_NR) {
rp->r_period = rs_start->rss_period;
}
/* Update restarts. */
if(rs_start->rss_restarts) {
rp->r_restarts = rs_start->rss_restarts;
}
/* (Re)initialize privilege settings. */
init_privs(rp, &rp->r_priv);
@ -1581,6 +1716,7 @@ endpoint_t source;
*/
rpub->sys_flags = DSRV_SF; /* system flags */
rp->r_priv.s_flags = DSRV_F; /* privilege flags */
rp->r_priv.s_init_flags = DSRV_I; /* init flags */
rp->r_priv.s_trap_mask = DSRV_T; /* allowed traps */
rp->r_priv.s_bak_sig_mgr = NONE; /* backup signal manager */
@ -1622,7 +1758,7 @@ endpoint_t source;
(unsigned int) rpub->pci_acl.rsp_class[i].pciclass,
(unsigned int) rpub->pci_acl.rsp_class[i].mask);
}
/* Initialize some fields. */
rp->r_restarts = 0; /* no restarts yet */
rp->r_old_rp = NULL; /* no old version yet */
@ -1635,6 +1771,9 @@ endpoint_t source;
rpub->label[0]= '\0'; /* no label yet */
rp->r_scheduler = -1; /* no scheduler yet */
rp->r_priv.s_sig_mgr = -1; /* no signal manager yet */
rp->r_map_prealloc_addr = 0; /* no preallocated memory */
rp->r_map_prealloc_len = 0;
rp->r_init_err = ERESTART; /* default init error `*/
/* Initialize editable slot settings. */
return edit_slot(rp, rs_start, source);
@ -1671,6 +1810,7 @@ struct rproc **clone_rpp;
*clone_rpub = *rpub;
/* Deep copy. */
clone_rp->r_init_err = ERESTART; /* default init error */
clone_rp->r_flags &= ~RS_ACTIVE; /* the clone is not active yet */
clone_rp->r_pid = -1; /* no pid yet */
clone_rpub->endpoint = -1; /* no endpoint yet */
@ -1689,6 +1829,7 @@ struct rproc **clone_rpp;
/* Clear instance flags. */
clone_rp->r_priv.s_flags &= ~(LU_SYS_PROC | RST_SYS_PROC);
clone_rp->r_priv.s_init_flags = 0;
*clone_rpp = clone_rp;
return OK;
@ -1716,12 +1857,11 @@ struct rproc **src_rpp;
struct rproc **dst_rpp;
{
/* Swap two service slots. */
struct rproc *src_rp;
struct rproc *dst_rp;
struct rprocpub *src_rpub;
struct rprocpub *dst_rpub;
struct rproc *src_rp, *dst_rp;
struct rprocpub *src_rpub, *dst_rpub;
struct rproc orig_src_rproc, orig_dst_rproc;
struct rprocpub orig_src_rprocpub, orig_dst_rprocpub;
struct rprocupd *prev_rpupd, *rpupd;
src_rp = *src_rpp;
dst_rp = *dst_rpp;
@ -1740,9 +1880,11 @@ struct rproc **dst_rpp;
*dst_rp = orig_src_rproc;
*dst_rpub = orig_src_rprocpub;
/* Restore public entries. */
/* Restore public entries and update descriptors. */
src_rp->r_pub = orig_src_rproc.r_pub;
dst_rp->r_pub = orig_dst_rproc.r_pub;
src_rp->r_upd = orig_src_rproc.r_upd;
dst_rp->r_upd = orig_dst_rproc.r_upd;
/* Rebuild command dependencies. */
build_cmd_dep(src_rp);
@ -1759,7 +1901,9 @@ struct rproc **dst_rpp;
swap_slot_pointer(&dst_rp->r_new_rp, src_rp, dst_rp);
/* Swap global slot pointers. */
swap_slot_pointer(&rupdate.rp, src_rp, dst_rp);
RUPDATE_ITER(rupdate.first_rpupd, prev_rpupd, rpupd,
swap_slot_pointer(&rpupd->rp, src_rp, dst_rp);
);
swap_slot_pointer(&rproc_ptr[_ENDPOINT_P(src_rp->r_pub->endpoint)],
src_rp, dst_rp);
swap_slot_pointer(&rproc_ptr[_ENDPOINT_P(dst_rp->r_pub->endpoint)],

90
minix/servers/rs/proto.h
View file

@ -2,6 +2,7 @@
/* Structs used in prototypes must be declared as such first. */
struct rproc;
struct rprocupd;
/* exec.c */
int srv_execve(int proc_e, char *exec, size_t exec_len, char *argv[],
@ -16,6 +17,7 @@ int do_down(message *m);
int do_refresh(message *m);
int do_restart(message *m);
int do_clone(message *m);
int do_unclone(message *m);
int do_edit(message *m);
int do_shutdown(message *m);
void do_period(message *m);
@ -25,6 +27,7 @@ int do_upd_ready(message *m);
void do_sigchld(void);
int do_getsysinfo(message *m);
int do_lookup(message *m);
int do_sysctl(message *m);
/* manager.c */
int check_call_permission(endpoint_t caller, int call, struct rproc
@ -33,8 +36,10 @@ int copy_rs_start(endpoint_t src_e, char *src_rs_start, struct rs_start
*rs_start);
int copy_label(endpoint_t src_e, char *src_label, size_t src_len, char
*dst_label, size_t dst_len);
int init_state_data(endpoint_t src_e, int prepare_state,
struct rs_state_data *src_rs_state_data,
struct rs_state_data *dst_rs_state_data);
void build_cmd_dep(struct rproc *rp);
int srv_update(endpoint_t src_e, endpoint_t dst_e);
#define kill_service(rp, errstr, err) \
kill_service_debug(__FILE__, __LINE__, rp, errstr, err)
int kill_service_debug(char *file, int line, struct rproc *rp, char
@ -44,29 +49,35 @@ int kill_service_debug(char *file, int line, struct rproc *rp, char
int crash_service_debug(char *file, int line, struct rproc *rp);
#define cleanup_service(rp) \
cleanup_service_debug(__FILE__, __LINE__, rp)
void cleanup_service_debug(char *file, int line, struct rproc *rp);
#define cleanup_service_now(rp) \
do { struct rproc *rpt = rp; cleanup_service(rpt); cleanup_service(rpt); } while(0)
void cleanup_service_debug(char *file, int line,
struct rproc *rp);
#define detach_service(rp) \
detach_service_debug(__FILE__, __LINE__, rp)
void detach_service_debug(char *file, int line,
struct rproc *rp);
int create_service(struct rproc *rp);
int clone_service(struct rproc *rp, int instance_flag);
int clone_service(struct rproc *rp, int instance_flag, int init_flags);
int publish_service(struct rproc *rp);
int unpublish_service(struct rproc *rp);
int run_service(struct rproc *rp, int init_type);
int start_service(struct rproc *rp);
int run_service(struct rproc *rp, int init_type, int init_flags);
int start_service(struct rproc *rp, int init_flags);
void stop_service(struct rproc *rp,int how);
int update_service(struct rproc **src_rpp, struct rproc **dst_rpp, int
swap_flag);
void activate_service(struct rproc *rp, struct rproc *ex_rp);
void terminate_service(struct rproc *rp);
void restart_service(struct rproc *rp);
void inherit_service_defaults(struct rproc *def_rp, struct rproc *rp);
void get_service_instances(struct rproc *rp, struct rproc ***rps, int
*length);
void inherit_service_defaults(struct rproc *def_rp,
struct rproc *rp);
void get_service_instances(struct rproc *rp, struct rproc ***rps,
int *length);
int read_exec(struct rproc *rp);
void share_exec(struct rproc *rp_src, struct rproc *rp_dst);
void free_exec(struct rproc *rp);
int init_slot(struct rproc *rp, struct rs_start *rs_start, endpoint_t
source);
int edit_slot(struct rproc *rp, struct rs_start *rs_start, endpoint_t
source);
int init_slot(struct rproc *rp, struct rs_start *rs_start,
endpoint_t source);
int edit_slot(struct rproc *rp, struct rs_start *rs_start,
endpoint_t source);
int clone_slot(struct rproc *rp, struct rproc **clone_rpp);
void swap_slot(struct rproc **src_rpp, struct rproc **dst_rpp);
struct rproc* lookup_slot_by_label(char *label);
@ -79,21 +90,58 @@ char *get_next_label(char *ptr, char *label, char *caller_label);
void add_forward_ipc(struct rproc *rp, struct priv *privp);
void add_backward_ipc(struct rproc *rp, struct priv *privp);
void init_privs(struct rproc *rp, struct priv *privp);
void end_srv_init(struct rproc *rp);
/* update.c */
void rupdate_clear_upds(void);
void rupdate_add_upd(struct rprocupd* rpupd);
void rupdate_set_new_upd_flags(struct rprocupd* rpupd);
void rupdate_upd_init(struct rprocupd* rpupd, struct rproc *rp);
void rupdate_upd_clear(struct rprocupd* rpupd);
void rupdate_upd_move(struct rproc* src_rp, struct rproc* dst_rp);
#define request_prepare_update_service(rp, state) \
request_prepare_update_service_debug(__FILE__, __LINE__, rp, state)
void request_prepare_update_service_debug(char *file, int line,
struct rproc *rp, int state);
int srv_update(endpoint_t src_e, endpoint_t dst_e, int sys_upd_flags);
int update_service(struct rproc **src_rpp,
struct rproc **dst_rpp, int swap_flag, int sys_upd_flags);
void rollback_service(struct rproc **src_rpp,
struct rproc **dst_rpp);
void update_period(message *m_ptr);
void end_update(int result, int reply_flag);
int start_update_prepare(int allow_retries);
struct rprocupd* start_update_prepare_next(void);
int start_update(void);
int start_srv_update(struct rprocupd *rpupd);
int complete_srv_update(struct rprocupd *rpupd);
void end_srv_update(struct rprocupd *rpupd, int result, int reply_flag);
int abort_update_proc(int reason);
#define end_update(result, reply_flag) \
end_update_debug(__FILE__, __LINE__, result, reply_flag)
void end_update_debug(char *file, int line,
int result, int reply_flag);
/* utility.c */
int init_service(struct rproc *rp, int type);
int init_service(struct rproc *rp, int type, int flags);
void fill_send_mask(sys_map_t *send_mask, int set_bits);
void fill_call_mask( int *calls, int tot_nr_calls, bitchunk_t
*call_mask, int call_base, int is_init);
char* srv_to_string(struct rproc *rp);
void fill_call_mask( int *calls, int tot_nr_calls,
bitchunk_t *call_mask, int call_base, int is_init);
#define srv_to_string(RP) srv_to_string_gen(RP, DEBUG)
char* srv_to_string_gen(struct rproc *rp, int is_verbose);
char* srv_upd_to_string(struct rprocupd *rpupd);
int rs_asynsend(struct rproc *rp, message *m_ptr, int no_reply);
int rs_receive_ticks(endpoint_t src, message *m_ptr,
int *status_ptr, int ticks);
void reply(endpoint_t who, struct rproc *rp, message *m_ptr);
void late_reply(struct rproc *rp, int code);
int rs_isokendpt(endpoint_t endpoint, int *proc);
int sched_init_proc(struct rproc *rp);
int update_sig_mgrs(struct rproc *rp, endpoint_t sig_mgr, endpoint_t
bak_sig_mgr);
int update_sig_mgrs(struct rproc *rp, endpoint_t sig_mgr,
endpoint_t bak_sig_mgr);
int rs_is_idle(void);
void rs_idle_period(void);
void print_services_status(void);
void print_update_status(void);
/* error.c */
char * init_strerror(int errnum);

666
minix/servers/rs/request.c Executable file → Normal file
View file

@ -21,6 +21,7 @@ message *m_ptr; /* request message pointer */
int r;
struct rs_start rs_start;
int noblock;
int init_flags = 0;
/* Check if the call can be allowed. */
if((r = check_call_permission(m_ptr->m_source, RS_UP, NULL)) != OK)
@ -43,7 +44,21 @@ message *m_ptr; /* request message pointer */
if (r != OK) {
return r;
}
/* Check flags. */
noblock = (rs_start.rss_flags & RSS_NOBLOCK);
if(rs_start.rss_flags & RSS_FORCE_INIT_CRASH) {
init_flags |= SEF_INIT_CRASH;
}
if(rs_start.rss_flags & RSS_FORCE_INIT_FAIL) {
init_flags |= SEF_INIT_FAIL;
}
if(rs_start.rss_flags & RSS_FORCE_INIT_TIMEOUT) {
init_flags |= SEF_INIT_TIMEOUT;
}
if(rs_start.rss_flags & RSS_FORCE_INIT_DEFCB) {
init_flags |= SEF_INIT_DEFCB;
}
/* Initialize the slot as requested. */
r = init_slot(rp, &rs_start, m_ptr->m_source);
@ -65,7 +80,7 @@ message *m_ptr; /* request message pointer */
}
/* All information was gathered. Now try to start the system service. */
r = start_service(rp);
r = start_service(rp, init_flags);
if(r != OK) {
return r;
}
@ -217,7 +232,7 @@ int do_clone(message *m_ptr)
/* Clone the service as requested. */
rpub->sys_flags |= SF_USE_REPL;
if ((r = clone_service(rp, RST_SYS_PROC)) != OK) {
if ((r = clone_service(rp, RST_SYS_PROC, 0)) != OK) {
rpub->sys_flags &= ~SF_USE_REPL;
return r;
}
@ -225,6 +240,51 @@ int do_clone(message *m_ptr)
return OK;
}
/*===========================================================================*
* do_unclone *
*===========================================================================*/
int do_unclone(message *m_ptr)
{
struct rproc *rp;
struct rprocpub *rpub;
int s, r;
char label[RS_MAX_LABEL_LEN];
/* Copy label. */
s = copy_label(m_ptr->m_source, m_ptr->m_rs_req.addr,
m_ptr->m_rs_req.len, label, sizeof(label));
if(s != OK) {
return s;
}
/* Lookup slot by label. */
rp = lookup_slot_by_label(label);
if(!rp) {
if(rs_verbose)
printf("RS: do_unclone: service '%s' not found\n", label);
return(ESRCH);
}
rpub = rp->r_pub;
/* Check if the call can be allowed. */
if((r = check_call_permission(m_ptr->m_source, RS_UNCLONE, rp)) != OK)
return r;
/* Don't unclone if no replica is available. */
if(!(rpub->sys_flags & SF_USE_REPL)) {
return ENOENT;
}
/* Unclone the service as requested. */
rpub->sys_flags &= ~SF_USE_REPL;
if(rp->r_next_rp) {
cleanup_service_now(rp->r_next_rp);
rp->r_next_rp = NULL;
}
return OK;
}
/*===========================================================================*
* do_edit *
*===========================================================================*/
@ -309,7 +369,7 @@ int do_edit(message *m_ptr)
cleanup_service(rp->r_next_rp);
rp->r_next_rp = NULL;
}
if ((r = clone_service(rp, RST_SYS_PROC)) != OK) {
if ((r = clone_service(rp, RST_SYS_PROC, 0)) != OK) {
printf("RS: warning: unable to clone %s\n", srv_to_string(rp));
}
}
@ -350,7 +410,12 @@ int do_refresh(message *m_ptr)
printf("RS: %s refreshing\n", srv_to_string(rp));
stop_service(rp,RS_REFRESHING);
return OK;
/* Late reply - send a reply when refresh completes. */
rp->r_flags |= RS_LATEREPLY;
rp->r_caller = m_ptr->m_source;
rp->r_caller_request = RS_REFRESH;
return EDONTREPLY;
}
/*===========================================================================*
@ -391,20 +456,14 @@ int do_init_ready(message *m_ptr)
{
int who_p;
message m;
struct rproc *rp;
struct rproc *rp, *new_rp;
struct rprocpub *rpub;
int result, is_rs;
int result;
int r;
is_rs = (m_ptr->m_source == RS_PROC_NR);
who_p = _ENDPOINT_P(m_ptr->m_source);
result = m_ptr->m_rs_init.result;
/* Check for RS failing initialization first. */
if(is_rs && result != OK) {
return result;
}
rp = rproc_ptr[who_p];
rpub = rp->r_pub;
@ -423,55 +482,43 @@ int do_init_ready(message *m_ptr)
if(rs_verbose)
printf("RS: %s initialization error: %s\n", srv_to_string(rp),
init_strerror(result));
if (result == ERESTART)
if (result == ERESTART && !SRV_IS_UPDATING(rp))
rp->r_flags |= RS_REINCARNATE;
crash_service(rp); /* simulate crash */
rp->r_init_err = result;
return EDONTREPLY;
}
/* Mark the slot as no longer initializing. */
rp->r_flags &= ~RS_INITIALIZING;
rp->r_check_tm = 0;
getticks(&rp->r_alive_tm);
/* Reply and unblock the service before doing anything else. */
m.m_type = OK;
reply(rpub->endpoint, rp, &m);
/* See if a late reply has to be sent. */
late_reply(rp, OK);
if(rs_verbose)
printf("RS: %s initialized\n", srv_to_string(rp));
/* If the service has completed initialization after a live
* update, end the update now.
/* If updating, check if there is no service to update left. In that case,
* end the update process. If VM has completed initialization as part of
* multi-component live update, let the other services under update run now.
*/
if(rp->r_flags & RS_UPDATING) {
printf("RS: update succeeded\n");
end_update(OK, RS_DONTREPLY);
}
/* If the service has completed initialization after a crash
* make the new instance active and cleanup the old replica.
*/
if(rp->r_prev_rp) {
cleanup_service(rp->r_prev_rp);
rp->r_prev_rp = NULL;
rp->r_restarts += 1;
if(rs_verbose)
printf("RS: %s completed restart\n", srv_to_string(rp));
}
/* If we must keep a replica of this system service, create it now. */
if(rpub->sys_flags & SF_USE_REPL) {
if ((r = clone_service(rp, RST_SYS_PROC)) != OK) {
printf("RS: warning: unable to clone %s\n", srv_to_string(rp));
if(SRV_IS_UPDATING(rp)) {
rupdate.num_init_ready_pending--;
rp->r_flags |= RS_INIT_DONE;
if(rupdate.num_init_ready_pending == 0) {
printf("RS: update succeeded\n");
end_update(OK, RS_REPLY);
}
}
else {
/* Mark the slot as no longer initializing. */
rp->r_flags &= ~RS_INITIALIZING;
rp->r_check_tm = 0;
getticks(&rp->r_alive_tm);
/* Reply and unblock the service before doing anything else. */
m.m_type = OK;
reply(rpub->endpoint, rp, &m);
/* Finalize initialization. */
end_srv_init(rp);
}
return is_rs ? OK : EDONTREPLY; /* return what the caller expects */
return EDONTREPLY;
}
/*===========================================================================*
@ -480,26 +527,25 @@ int do_init_ready(message *m_ptr)
int do_update(message *m_ptr)
{
struct rproc *rp;
struct rproc *trg_rp;
struct rproc *new_rp;
struct rprocpub *rpub;
struct rprocupd *rpupd;
struct rs_start rs_start;
int noblock, do_self_update;
int noblock, do_self_update, force_self_update, batch_mode, prepare_only;
int s;
char label[RS_MAX_LABEL_LEN];
int lu_state;
int prepare_maxtime;
int prepare_state, prepare_maxtime;
endpoint_t state_endpoint;
int lu_flags = 0;
int init_flags = 0;
int allow_retries = 0;
/* Copy the request structure. */
s = copy_rs_start(m_ptr->m_source, m_ptr->m_rs_req.addr, &rs_start);
if (s != OK) {
return s;
}
noblock = (rs_start.rss_flags & RSS_NOBLOCK);
do_self_update = (rs_start.rss_flags & RSS_SELF_LU);
s = check_request(&rs_start);
if (s != OK) {
return s;
}
/* Copy label. */
s = copy_label(m_ptr->m_source, rs_start.rss_label.l_addr,
@ -517,130 +563,323 @@ int do_update(message *m_ptr)
}
rpub = rp->r_pub;
/* Check flags. */
noblock = (rs_start.rss_flags & RSS_NOBLOCK);
do_self_update = (rs_start.rss_flags & RSS_SELF_LU);
force_self_update = (rs_start.rss_flags & RSS_FORCE_SELF_LU);
batch_mode = (rs_start.rss_flags & RSS_BATCH);
prepare_only = (rs_start.rss_flags & RSS_PREPARE_ONLY_LU);
if(do_self_update || force_self_update) {
lu_flags |= SEF_LU_SELF;
}
if(prepare_only) {
lu_flags |= SEF_LU_PREPARE_ONLY;
}
if(rs_start.rss_flags & RSS_ASR_LU) {
lu_flags |= SEF_LU_ASR;
}
if(rs_start.rss_flags & RSS_UNSAFE_LU) {
lu_flags |= SEF_LU_UNSAFE;
}
if(!prepare_only && (rs_start.rss_flags & RSS_DETACH)) {
lu_flags |= SEF_LU_DETACHED;
}
if(rs_start.rss_map_prealloc_bytes <= 0
&& rpub->endpoint == VM_PROC_NR
&& (((lu_flags & (SEF_LU_SELF|SEF_LU_ASR)) != SEF_LU_SELF) || rs_start.rss_flags & RSS_FORCE_INIT_ST)
&& RS_VM_DEFAULT_MAP_PREALLOC_LEN > 0) {
/* Give VM some mmapped regions by default on non-identical updates.*/
rs_start.rss_map_prealloc_bytes = RS_VM_DEFAULT_MAP_PREALLOC_LEN;
if(rs_verbose)
printf("RS: %s gets %ld default mmap bytes\n", srv_to_string(rp),
rs_start.rss_map_prealloc_bytes);
}
if((rs_start.rss_flags & RSS_NOMMAP_LU) || rs_start.rss_map_prealloc_bytes) {
/* Don't inherit mmapped regions at update time if requested or if
* mmap preallocation is used.
*/
lu_flags |= SEF_LU_NOMMAP;
}
if(rs_start.rss_flags & RSS_FORCE_INIT_CRASH) {
init_flags |= SEF_INIT_CRASH;
}
if(rs_start.rss_flags & RSS_FORCE_INIT_FAIL) {
init_flags |= SEF_INIT_FAIL;
}
if(rs_start.rss_flags & RSS_FORCE_INIT_TIMEOUT) {
init_flags |= SEF_INIT_TIMEOUT;
}
if(rs_start.rss_flags & RSS_FORCE_INIT_DEFCB) {
init_flags |= SEF_INIT_DEFCB;
}
if(rs_start.rss_flags & RSS_FORCE_INIT_ST) {
init_flags |= SEF_INIT_ST;
}
init_flags |= lu_flags;
/* Lookup target label (if any). */
trg_rp = NULL;
state_endpoint = NONE;
if(rs_start.rss_trg_label.l_len > 0) {
s = copy_label(m_ptr->m_source, rs_start.rss_trg_label.l_addr,
rs_start.rss_trg_label.l_len, label, sizeof(label));
if(s != OK) {
return s;
}
trg_rp = lookup_slot_by_label(label);
if(!trg_rp) {
if(rs_verbose)
printf("RS: do_update: target service '%s' not found\n", label);
return ESRCH;
}
state_endpoint = trg_rp->r_pub->endpoint;
}
/* Check if the call can be allowed. */
if((s = check_call_permission(m_ptr->m_source, RS_UPDATE, rp)) != OK)
return s;
/* Retrieve live update state. */
lu_state = m_ptr->m_rs_update.state;
if(lu_state == SEF_LU_STATE_NULL) {
prepare_state = m_ptr->m_rs_update.state;
if(prepare_state == SEF_LU_STATE_NULL) {
return(EINVAL);
}
/* Retrieve prepare max time. */
prepare_maxtime = m_ptr->m_rs_update.prepare_maxtime;
if(prepare_maxtime) {
if(prepare_maxtime < 0 || prepare_maxtime > RS_MAX_PREPARE_MAXTIME) {
return(EINVAL);
}
}
else {
if(prepare_maxtime == 0) {
prepare_maxtime = RS_DEFAULT_PREPARE_MAXTIME;
}
/* Make sure we are not already updating. */
if(rupdate.flags & RS_UPDATING) {
if(rs_verbose)
printf("RS: do_update: an update is already in progress\n");
if(RUPDATE_IS_UPDATING()) {
printf("RS: an update is already in progress\n");
return EBUSY;
}
/* If an update is already scheduled, check constraints. */
if(RUPDATE_IS_UPD_SCHEDULED()) {
if(!batch_mode) {
printf("RS: an update is already scheduled, cannot start a new one\n");
return EBUSY;
}
if(SRV_IS_UPD_SCHEDULED(rp)) {
printf("RS: the specified process is already part of the currently scheduled update\n");
return EINVAL;
}
if(rupdate.last_rpupd->rp->r_pub->endpoint == RS_PROC_NR) {
printf("RS: RS should always be the last service to update in a multi-component update\n");
return EINVAL;
}
}
/* Prepare-only update for VM, PM, and VFS is only supported with an unreachable state. */
if(prepare_only
&& (rp->r_pub->endpoint == VM_PROC_NR || rp->r_pub->endpoint == PM_PROC_NR || rp->r_pub->endpoint == VFS_PROC_NR)) {
if(prepare_state != SEF_LU_STATE_UNREACHABLE) {
printf("RS: prepare-only update for VM, PM and VFS is only supported with state %d\n", SEF_LU_STATE_UNREACHABLE);
return EINVAL;
}
}
/* Prepare-only update for RS is not supported. */
if(prepare_only && rp->r_pub->endpoint == RS_PROC_NR) {
printf("RS: prepare-only update for RS is not supported\n");
return EINVAL;
}
/* Initialize update descriptor. */
rpupd = &rp->r_upd;
rupdate_upd_init(rpupd, rp);
rpupd->lu_flags |= lu_flags;
rpupd->init_flags |= init_flags;
rupdate_set_new_upd_flags(rpupd);
/* A self update live updates a service instance into a replica, a regular
* update live updates a service instance into a new version, as specified
* by the given binary.
*/
if(do_self_update) {
if(rs_verbose)
printf("RS: %s performs self update\n", srv_to_string(rp));
/* Clone the system service and use the replica as the new version. */
s = clone_service(rp, LU_SYS_PROC);
if(s != OK) {
printf("RS: do_update: unable to clone service: %d\n", s);
return s;
if(!prepare_only) {
if(do_self_update) {
if(rs_verbose)
printf("RS: %s requested to perform self update\n", srv_to_string(rp));
/* Clone the system service and use the replica as the new version. */
s = clone_service(rp, LU_SYS_PROC, rpupd->init_flags);
if(s != OK) {
printf("RS: do_update: unable to clone service: %d\n", s);
return s;
}
new_rp = rp->r_new_rp;
}
}
else {
if(rs_verbose)
printf("RS: %s performs regular update\n", srv_to_string(rp));
/* Allocate a system service slot for the new version. */
s = alloc_slot(&new_rp);
if(s != OK) {
printf("RS: do_update: unable to allocate a new slot: %d\n", s);
return s;
else {
if(rs_verbose)
printf("RS: %s requested to perform %s update\n", srv_to_string(rp),
force_self_update ? "(forced) self" : "regular");
/* Allocate a system service slot for the new version. */
s = alloc_slot(&new_rp);
if(s != OK) {
printf("RS: do_update: unable to allocate a new slot: %d\n", s);
return s;
}
/* Initialize the slot as requested. */
s = init_slot(new_rp, &rs_start, m_ptr->m_source);
if(s != OK) {
printf("RS: do_update: unable to init the new slot: %d\n", s);
return s;
}
/* Let the new version inherit defaults from the old one. */
inherit_service_defaults(rp, new_rp);
/* Link the two versions. */
rp->r_new_rp = new_rp;
new_rp->r_old_rp = rp;
/* Create new version of the service but don't let it run. */
new_rp->r_priv.s_flags |= LU_SYS_PROC;
new_rp->r_priv.s_init_flags |= rpupd->init_flags;
s = create_service(new_rp);
if(s != OK) {
printf("RS: do_update: unable to create a new service: %d\n", s);
return s;
}
}
/* Initialize the slot as requested. */
s = init_slot(new_rp, &rs_start, m_ptr->m_source);
if(s != OK) {
printf("RS: do_update: unable to init the new slot: %d\n", s);
return s;
/* Set default state endpoint. */
if(state_endpoint == NONE) {
state_endpoint = new_rp->r_pub->endpoint;
}
/* Let the new version inherit defaults from the old one. */
inherit_service_defaults(rp, new_rp);
/* If RS is updating, set up signal managers for the new instance.
* The current RS instance must be made the backup signal manager to
* support rollback in case of a crash during initialization.
*/
if(rp->r_priv.s_flags & ROOT_SYS_PROC) {
s = update_sig_mgrs(new_rp, SELF, new_rp->r_pub->endpoint);
if(s != OK) {
cleanup_service(new_rp);
return s;
}
}
/* Link the two versions. */
rp->r_new_rp = new_rp;
new_rp->r_old_rp = rp;
/* Preallocate heap regions if requested. */
if(rs_start.rss_heap_prealloc_bytes < 0) {
rs_start.rss_heap_prealloc_bytes = 0;
}
if(rs_start.rss_heap_prealloc_bytes) {
size_t len;
if(rs_verbose)
printf("RS: %s preallocating %ld heap bytes\n", srv_to_string(new_rp),
rs_start.rss_heap_prealloc_bytes);
/* Create new version of the service but don't let it run. */
new_rp->r_priv.s_flags |= LU_SYS_PROC;
s = create_service(new_rp);
if(s != OK) {
printf("RS: do_update: unable to create a new service: %d\n", s);
return s;
len = rs_start.rss_heap_prealloc_bytes;
s = vm_memctl(new_rp->r_pub->endpoint, VM_RS_MEM_HEAP_PREALLOC,
NULL, &len);
if(s != OK) {
printf("vm_memctl(VM_RS_MEM_HEAP_PREALLOC) failed: %d\n", s);
cleanup_service(new_rp);
return s;
}
if(rp->r_priv.s_flags & ROOT_SYS_PROC) {
vm_memctl(new_rp->r_pub->endpoint, VM_RS_MEM_PIN, 0, 0);
}
}
/* Preallocate mmapped regions if requested. */
if(rs_start.rss_map_prealloc_bytes < 0) {
rs_start.rss_map_prealloc_bytes = 0;
}
if(rs_start.rss_map_prealloc_bytes) {
void *addr = NULL;
if(rs_verbose)
printf("RS: %s preallocating %ld mmap bytes\n", srv_to_string(new_rp),
rs_start.rss_map_prealloc_bytes);
new_rp->r_map_prealloc_len = rs_start.rss_map_prealloc_bytes;
s = vm_memctl(new_rp->r_pub->endpoint, VM_RS_MEM_MAP_PREALLOC,
&addr, &new_rp->r_map_prealloc_len);
if(s != OK) {
printf("vm_memctl(VM_RS_MEM_MAP_PREALLOC) failed: %d\n", s);
cleanup_service(new_rp);
return s;
}
new_rp->r_map_prealloc_addr = (vir_bytes) addr;
}
}
/* Mark both versions as updating. */
rp->r_flags |= RS_UPDATING;
rp->r_new_rp->r_flags |= RS_UPDATING;
rupdate.flags |= RS_UPDATING;
getticks(&rupdate.prepare_tm);
rupdate.prepare_maxtime = prepare_maxtime;
rupdate.rp = rp;
/* Process state data. */
s = init_state_data(m_ptr->m_source, prepare_state, &rs_start.rss_state_data, &rpupd->prepare_state_data);
if(s != OK) {
rupdate_upd_clear(rpupd);
return s;
}
/* Create update grants. */
if(rpupd->prepare_state_data.size > 0) {
struct rs_state_data *state_data = &rpupd->prepare_state_data;
rpupd->prepare_state_data_gid = cpf_grant_direct(rpub->endpoint, (vir_bytes) state_data,
state_data->size, CPF_READ);
if(rpupd->prepare_state_data_gid == GRANT_INVALID) {
rupdate_upd_clear(rpupd);
return ENOMEM;
}
state_data->ipcf_els_gid = GRANT_INVALID;
if(state_data->ipcf_els) {
state_data->ipcf_els_gid = (int) cpf_grant_direct(rpub->endpoint, (vir_bytes) state_data->ipcf_els,
state_data->ipcf_els_size, CPF_READ);
if(state_data->ipcf_els_gid == GRANT_INVALID) {
rupdate_upd_clear(rpupd);
return ENOMEM;
}
}
state_data->eval_gid = GRANT_INVALID;
if(state_data->eval_addr) {
state_data->eval_gid = (int) cpf_grant_direct(rpub->endpoint, (vir_bytes) state_data->eval_addr,
state_data->eval_len, CPF_READ);
if(state_data->eval_gid == GRANT_INVALID) {
rupdate_upd_clear(rpupd);
return ENOMEM;
}
}
}
/* Fill the new update descriptor and add it to the update chain. */
rpupd->prepare_state = prepare_state;
rpupd->state_endpoint = state_endpoint;
getticks(&rpupd->prepare_tm);
rpupd->prepare_maxtime = prepare_maxtime;
rupdate_add_upd(rpupd);
if(rs_verbose)
printf("RS: %s updating\n", srv_to_string(rp));
printf("RS: %s scheduled for %s\n", srv_to_string(rp), srv_upd_to_string(rpupd));
/* If RS is updating, set up signal managers for the new instance.
* The current RS instance must be made the backup signal manager to
* support rollback in case of a crash during initialization.
*/
if(rp->r_priv.s_flags & ROOT_SYS_PROC) {
new_rp = rp->r_new_rp;
s = update_sig_mgrs(new_rp, SELF, new_rp->r_pub->endpoint);
if(s != OK) {
cleanup_service(new_rp);
return s;
}
/* If batch mode, reply immediately. More services to update will follow. */
if(batch_mode) {
return OK;
}
/* Start preparing for the update process. */
s = start_update_prepare(allow_retries);
if(s == ESRCH) {
/* No process left in the update chain. We are done already. */
return OK;
}
if(s != OK) {
return s;
}
/* Unblock the caller immediately if requested. */
if(noblock) {
/* Unblock the caller immediately if requested. */
m_ptr->m_type = OK;
reply(m_ptr->m_source, NULL, m_ptr);
}
else {
/* Send a reply when the new version completes initialization. */
rp->r_flags |= RS_LATEREPLY;
rp->r_caller = m_ptr->m_source;
rp->r_caller_request = RS_UPDATE;
return OK;
}
/* Request to update. */
m_ptr->m_type = RS_LU_PREPARE;
if(rpub->endpoint == RS_PROC_NR) {
/* RS can process the request directly. */
do_sef_lu_request(m_ptr);
}
else {
/* Send request message to the system service. */
asynsend3(rpub->endpoint, m_ptr, AMF_NOREPLY);
}
/* Otherwise, send a reply when the new version completes initialization. */
rupdate.last_rpupd->rp->r_flags |= RS_LATEREPLY;
rupdate.last_rpupd->rp->r_caller = m_ptr->m_source;
rupdate.last_rpupd->rp->r_caller_request = RS_UPDATE;
return EDONTREPLY;
}
@ -650,75 +889,51 @@ int do_update(message *m_ptr)
*===========================================================================*/
int do_upd_ready(message *m_ptr)
{
struct rproc *rp, *old_rp, *new_rp;
struct rproc *rp;
struct rprocupd *prev_rpupd, *rpupd;
int who_p;
int result;
int is_rs;
int r;
int i;
who_p = _ENDPOINT_P(m_ptr->m_source);
rp = rproc_ptr[who_p];
result = m_ptr->m_rs_update.result;
is_rs = (m_ptr->m_source == RS_PROC_NR);
/* Make sure the originating service was requested to prepare for update. */
if(rp != rupdate.rp) {
rpupd = rupdate.curr_rpupd;
if(!rpupd || rp != rpupd->rp || RUPDATE_IS_INITIALIZING()) {
if(rs_verbose)
printf("RS: do_upd_ready: got unexpected update ready msg from %d\n",
m_ptr->m_source);
printf("RS: %s sent late/unexpected update ready msg\n",
srv_to_string(rp));
return EINVAL;
}
rp->r_flags |= RS_PREPARE_DONE;
/* Check if something went wrong and the service failed to prepare
* for the update. In that case, end the update process. The old version will
* be replied to and continue executing.
*/
if(result != OK) {
printf("RS: update failed: %s\n", lu_strerror(result));
end_update(result, RS_REPLY);
printf("RS: update failed: %s\n", lu_strerror(result));
return is_rs ? result : EDONTREPLY; /* return what the caller expects */
}
old_rp = rp;
new_rp = rp->r_new_rp;
/* If RS itself is updating, yield control to the new version immediately. */
if(is_rs) {
r = init_service(new_rp, SEF_INIT_LU);
if(r != OK) {
panic("unable to initialize the new RS instance: %d", r);
}
r = sys_privctl(new_rp->r_pub->endpoint, SYS_PRIV_YIELD, NULL);
if(r != OK) {
panic("unable to yield control to the new RS instance: %d", r);
}
/* If we get this far, the new version failed to initialize. Rollback. */
r = srv_update(RS_PROC_NR, new_rp->r_pub->endpoint);
assert(r == OK); /* can't fail */
end_update(ERESTART, RS_REPLY);
return ERESTART;
}
/* Perform the update. */
r = update_service(&old_rp, &new_rp, RS_SWAP);
if(r != OK) {
end_update(r, RS_REPLY);
printf("RS: update failed: error %d\n", r);
return EDONTREPLY;
}
/* Let the new version run. */
r = run_service(new_rp, SEF_INIT_LU);
if(r != OK) {
/* Something went wrong. Rollback. */
r = update_service(&new_rp, &old_rp, RS_SWAP);
assert(r == OK); /* can't fail */
end_update(r, RS_REPLY);
printf("RS: update failed: error %d\n", r);
if(rs_verbose)
printf("RS: %s ready to update\n", srv_to_string(rp));
/* If this is a multi-component update and this is not the last service
* in the update, request the next process to update.
*/
if(start_update_prepare_next() != NULL) {
return EDONTREPLY;
}
/* Now perform the update and request each new instance to initialize. */
start_update();
return EDONTREPLY;
}
@ -735,7 +950,7 @@ message *m_ptr;
long period;
/* If an update is in progress, check its status. */
if(rupdate.flags & RS_UPDATING) {
if(RUPDATE_IS_UPDATING() && !RUPDATE_IS_INITIALIZING()) {
update_period(m_ptr);
}
@ -744,12 +959,13 @@ message *m_ptr;
*/
for (rp=BEG_RPROC_ADDR; rp<END_RPROC_ADDR; rp++) {
rpub = rp->r_pub;
if ((rp->r_flags & RS_ACTIVE) && !(rp->r_flags & RS_UPDATING)) {
if ((rp->r_flags & RS_ACTIVE) && (!SRV_IS_UPDATING(rp) || ((rp->r_flags & (RS_INITIALIZING|RS_INIT_DONE|RS_INIT_PENDING)) == RS_INITIALIZING))) {
/* Compute period. */
period = rp->r_period;
if(rp->r_flags & RS_INITIALIZING) {
period = RS_INIT_T;
period = SRV_IS_UPDATING(rp) ? UPD_INIT_MAXTIME(&rp->r_upd) : RS_INIT_T;
}
/* If the service is to be revived (because it repeatedly exited,
@ -787,10 +1003,16 @@ message *m_ptr;
*/
if (rp->r_alive_tm < rp->r_check_tm) {
if (now - rp->r_alive_tm > 2*period &&
rp->r_pid > 0 && !(rp->r_flags & RS_NOPINGREPLY)) {
rp->r_pid > 0 && !(rp->r_flags & RS_NOPINGREPLY)) {
struct rproc *rp2;
int init_flag;
if(rs_verbose)
printf("RS: %s reported late\n", srv_to_string(rp));
if(lookup_slot_by_flags(RS_INITIALIZING)) {
init_flag = rp->r_flags & RS_INITIALIZING;
rp->r_flags &= ~RS_INITIALIZING;
rp2 = lookup_slot_by_flags(RS_INITIALIZING);
rp->r_flags |= init_flag;
if(rp2 != NULL && !SRV_IS_UPDATING(rp)) {
/* Skip for now. */
if(rs_verbose)
printf("RS: %s gets a free pass\n",
@ -801,6 +1023,9 @@ message *m_ptr;
}
rp->r_flags |= RS_NOPINGREPLY;
crash_service(rp); /* simulate crash */
if(rp->r_flags & RS_INITIALIZING) {
rp->r_init_err = EINTR;
}
}
}
@ -830,7 +1055,7 @@ void do_sigchld()
int status;
struct rproc *rp;
struct rproc **rps;
int i, nr_rps;
int i, nr_rps, found;
if(rs_verbose)
printf("RS: got SIGCHLD signal, cleaning up dead children\n");
@ -848,13 +1073,18 @@ void do_sigchld()
* free slots for all the service instances and send a late
* reply if necessary.
*/
found = 0;
get_service_instances(rp, &rps, &nr_rps);
for(i=0;i<nr_rps;i++) {
if(rupdate.flags & RS_UPDATING) {
rupdate.flags &= ~RS_UPDATING;
if(SRV_IS_UPDATING(rps[i])) {
rps[i]->r_flags &= ~(RS_UPDATING|RS_PREPARE_DONE|RS_INIT_DONE|RS_INIT_PENDING);
found = 1;
}
free_slot(rps[i]);
}
if(found) {
rupdate_clear_upds();
}
}
}
}
@ -945,6 +1175,54 @@ message *m_ptr;
return OK;
}
/*===========================================================================*
* do_sysctl *
*===========================================================================*/
int do_sysctl(message *m_ptr)
{
int request_type = m_ptr->m_rs_req.subtype;
int r, allow_retries = 1;
switch(request_type) {
case RS_SYSCTL_SRV_STATUS:
print_services_status();
break;
case RS_SYSCTL_UPD_START:
case RS_SYSCTL_UPD_RUN:
r = start_update_prepare(allow_retries);
print_update_status();
if(r != OK) {
if(r == ESRCH) {
/* We are done already. */
r = OK;
}
return r;
}
if(request_type == RS_SYSCTL_UPD_START) {
return OK;
}
/* Send a reply when done. */
rupdate.last_rpupd->rp->r_flags |= RS_LATEREPLY;
rupdate.last_rpupd->rp->r_caller = m_ptr->m_source;
rupdate.last_rpupd->rp->r_caller_request = RS_UPDATE;
return EDONTREPLY;
break;
case RS_SYSCTL_UPD_STOP:
r = abort_update_proc(EINTR);
print_update_status();
return r;
break;
case RS_SYSCTL_UPD_STATUS:
print_update_status();
break;
default:
printf("RS: bad sysctl type\n");
return EINVAL;
break;
}
return OK;
}
/*===========================================================================*
* check_request *
*===========================================================================*/

40
minix/servers/rs/type.h
View file

@ -25,6 +25,32 @@ struct boot_image_dev {
dev_t dev_nr; /* major device number */
};
/* Definition of the update descriptors. */
struct rproc;
struct rprocupd {
int lu_flags; /* user-specified live update flags */
int init_flags; /* user-specified init flags */
int prepare_state; /* the state the process has to prepare for the update */
endpoint_t state_endpoint; /* the custom process to transfer the state from (if any). */
clock_t prepare_tm; /* timestamp of when the update was scheduled */
clock_t prepare_maxtime; /* max time to wait for the process to be ready */
struct rproc *rp; /* the process under update */
struct rs_state_data prepare_state_data; /* state data for the update */
cp_grant_id_t prepare_state_data_gid; /* state data gid */
struct rprocupd *prev_rpupd; /* the previous process under update */
struct rprocupd *next_rpupd; /* the next process under update */
};
struct rupdate {
int flags; /* flags to keep track of the status of the update */
int num_rpupds; /* number of descriptors scheduled for the update */
int num_init_ready_pending; /* number of pending init ready messages */
struct rprocupd *curr_rpupd; /* the current descriptor under update */
struct rprocupd *first_rpupd; /* first descriptor scheduled for the update */
struct rprocupd *last_rpupd; /* last descriptor scheduled for the update */
struct rprocupd *vm_rpupd; /* VM descriptor scheduled for the update */
struct rprocupd *rs_rpupd; /* RS descriptor scheduled for the update */
};
/* Definition of an entry of the system process table. */
struct rproc {
struct rprocpub *r_pub; /* pointer to the corresponding public entry */
@ -32,11 +58,13 @@ struct rproc {
struct rproc *r_new_rp; /* pointer to the slot with the new version */
struct rproc *r_prev_rp; /* pointer to the slot with the prev replica */
struct rproc *r_next_rp; /* pointer to the slot with the next replica */
struct rprocupd r_upd; /* update descriptor */
pid_t r_pid; /* process id, -1 if the process is not there */
int r_restarts; /* number of restarts (initially zero) */
long r_backoff; /* number of periods to wait before revive */
unsigned r_flags; /* status and policy flags */
int r_init_err; /* error code at initialization time */
long r_period; /* heartbeat period (or zero) */
clock_t r_check_tm; /* timestamp of last check */
@ -63,6 +91,8 @@ struct rproc {
int r_priority; /* negative values are reserved for special meanings */
int r_quantum;
int r_cpu;
vir_bytes r_map_prealloc_addr; /* preallocated mmap address */
size_t r_map_prealloc_len; /* preallocated mmap len */
/* Backup values from the privilege structure. */
struct io_range r_io_tab[NR_IO_RANGE];
@ -75,12 +105,6 @@ struct rproc {
char r_control[RS_NR_CONTROL][RS_MAX_LABEL_LEN];
};
/* Definition of the global update descriptor. */
struct rupdate {
int flags; /* flags to keep track of the status of the update */
clock_t prepare_tm; /* timestamp of when the update was scheduled */
clock_t prepare_maxtime; /* max time to wait for the process to be ready */
struct rproc *rp; /* the process under update */
};
#endif /* RS_TYPE_H */

960
minix/servers/rs/update.c Normal file
View file

@ -0,0 +1,960 @@
#include "inc.h"
/*===========================================================================*
* rupdate_clear_upds *
*===========================================================================*/
void rupdate_clear_upds()
{
/* Clear the update chain and the global update descriptor. */
struct rprocupd *prev_rpupd, *rpupd;
RUPDATE_ITER(rupdate.first_rpupd, prev_rpupd, rpupd,
if(prev_rpupd) {
rupdate_upd_clear(prev_rpupd);
}
);
rupdate_upd_clear(rupdate.last_rpupd);
RUPDATE_CLEAR();
}
/*===========================================================================*
* rupdate_add_upd *
*===========================================================================*/
void rupdate_add_upd(struct rprocupd* rpupd)
{
/* Add an update descriptor to the update chain. */
struct rprocupd* prev_rpupd;
int lu_flags;
rpupd->prev_rpupd = rupdate.last_rpupd;
if(rupdate.num_rpupds == 0) {
rupdate.first_rpupd = rpupd;
rupdate.curr_rpupd = rpupd;
}
else {
rupdate.last_rpupd->next_rpupd = rpupd;
}
rupdate.last_rpupd = rpupd;
rupdate.num_rpupds++;
/* Propagate relevant flags from the new descriptor. */
lu_flags = rpupd->lu_flags & (SEF_LU_INCLUDES_VM|SEF_LU_INCLUDES_RS|SEF_LU_UNSAFE|SEF_LU_MULTI);
if(lu_flags) {
RUPDATE_ITER(rupdate.first_rpupd, prev_rpupd, rpupd,
rpupd->lu_flags |= lu_flags;
rpupd->init_flags |= lu_flags;
);
}
/* Set VM/RS update descriptor pointers. */
if(!rupdate.vm_rpupd && (lu_flags & SEF_LU_INCLUDES_VM)) {
rupdate.vm_rpupd = rupdate.last_rpupd;
}
else if(!rupdate.rs_rpupd && (lu_flags & SEF_LU_INCLUDES_RS)) {
rupdate.rs_rpupd = rupdate.last_rpupd;
}
}
/*===========================================================================*
* rupdate_set_new_upd_flags *
*===========================================================================*/
void rupdate_set_new_upd_flags(struct rprocupd* rpupd)
{
/* Set multi-component update flags. */
if(rupdate.num_rpupds > 0) {
rpupd->lu_flags |= SEF_LU_MULTI;
rpupd->init_flags |= SEF_LU_MULTI;
}
/* Propagate relevant flags from last service under update (if any). */
if(rupdate.last_rpupd) {
int lu_flags = rupdate.last_rpupd->lu_flags & (SEF_LU_INCLUDES_VM|SEF_LU_INCLUDES_RS|SEF_LU_UNSAFE);
rpupd->lu_flags |= lu_flags;
rpupd->init_flags |= lu_flags;
}
if(UPD_IS_PREPARING_ONLY(rpupd)) {
return;
}
/* Set VM/RS update flags. */
if(rpupd->rp->r_pub->endpoint == VM_PROC_NR) {
rpupd->lu_flags |= SEF_LU_INCLUDES_VM;
rpupd->init_flags |= SEF_LU_INCLUDES_VM;
}
else if(rpupd->rp->r_pub->endpoint == RS_PROC_NR) {
rpupd->lu_flags |= SEF_LU_INCLUDES_RS;
rpupd->init_flags |= SEF_LU_INCLUDES_RS;
}
}
/*===========================================================================*
* rupdate_upd_init *
*===========================================================================*/
void rupdate_upd_init(struct rprocupd* rpupd, struct rproc *rp)
{
/* Initialize an update descriptor for a given service. */
memset(rpupd, 0, sizeof(*(rpupd)));
rpupd->prepare_state_data_gid = GRANT_INVALID;
rpupd->prepare_state_data.ipcf_els_gid = GRANT_INVALID;
rpupd->prepare_state_data.eval_gid = GRANT_INVALID;
rpupd->state_endpoint = NONE;
rpupd->rp = rp;
}
/*===========================================================================*
* rupdate_upd_clear *
*===========================================================================*/
void rupdate_upd_clear(struct rprocupd* rpupd)
{
/* Clear an update descriptor. */
if(rpupd->rp->r_new_rp) {
cleanup_service(rpupd->rp->r_new_rp);
}
if(rpupd->prepare_state_data_gid != GRANT_INVALID) {
cpf_revoke(rpupd->prepare_state_data_gid);
}
if(rpupd->prepare_state_data.size > 0) {
if(rpupd->prepare_state_data.ipcf_els_gid != GRANT_INVALID) {
cpf_revoke(rpupd->prepare_state_data.ipcf_els_gid);
}
if(rpupd->prepare_state_data.eval_gid != GRANT_INVALID) {
cpf_revoke(rpupd->prepare_state_data.eval_gid);
}
if(rpupd->prepare_state_data.ipcf_els) {
free(rpupd->prepare_state_data.ipcf_els);
}
if(rpupd->prepare_state_data.eval_addr) {
free(rpupd->prepare_state_data.eval_addr);
}
}
rupdate_upd_init(rpupd,NULL);
}
/*===========================================================================*
* rupdate_upd_move *
*===========================================================================*/
void rupdate_upd_move(struct rproc* src_rp, struct rproc* dst_rp)
{
/* Move an update descriptor from one service instance to another. */
dst_rp->r_upd = src_rp->r_upd;
dst_rp->r_upd.rp = dst_rp;
if(src_rp->r_new_rp) {
assert(!dst_rp->r_new_rp);
dst_rp->r_new_rp = src_rp->r_new_rp;
dst_rp->r_new_rp->r_old_rp = dst_rp;
}
if(dst_rp->r_upd.prev_rpupd) dst_rp->r_upd.prev_rpupd->next_rpupd = &dst_rp->r_upd;
if(dst_rp->r_upd.next_rpupd) dst_rp->r_upd.next_rpupd->prev_rpupd = &dst_rp->r_upd;
if(rupdate.first_rpupd == &src_rp->r_upd) rupdate.first_rpupd = &dst_rp->r_upd;
if(rupdate.last_rpupd == &src_rp->r_upd) rupdate.last_rpupd = &dst_rp->r_upd;
rupdate_upd_init(&src_rp->r_upd, NULL);
src_rp->r_new_rp = NULL;
}
/*===========================================================================*
* request_prepare_update_service_debug *
*===========================================================================*/
void request_prepare_update_service_debug(char *file, int line,
struct rproc *rp, int state)
{
/* Request a service to prepare/cancel the update. */
message m;
struct rprocpub *rpub;
int no_reply;
rpub = rp->r_pub;
if(state != SEF_LU_STATE_NULL) {
struct rprocupd *rpupd = &rp->r_upd;
getticks(&rpupd->prepare_tm);
if(!UPD_IS_PREPARING_ONLY(rpupd)) {
assert(rp->r_new_rp);
rp->r_flags |= RS_UPDATING;
rp->r_new_rp->r_flags |= RS_UPDATING;
}
else {
assert(!rp->r_new_rp);
}
m.m_rs_update.flags = rpupd->lu_flags;
m.m_rs_update.state_data_gid = rpupd->prepare_state_data_gid;
if(rs_verbose)
printf("RS: %s being requested to prepare for the %s at %s:%d\n",
srv_to_string(rp), srv_upd_to_string(rpupd), file, line);
}
else {
if(rs_verbose)
printf("RS: %s being requested to cancel the update at %s:%d\n",
srv_to_string(rp), file, line);
}
/* Request to prepare for the update or cancel the update. */
m.m_type = RS_LU_PREPARE;
m.m_rs_update.state = state;
no_reply = !(rp->r_flags & RS_PREPARE_DONE);
rs_asynsend(rp, &m, no_reply);
}
/*===========================================================================*
* srv_update *
*===========================================================================*/
int srv_update(endpoint_t src_e, endpoint_t dst_e, int sys_upd_flags)
{
int r = OK;
/* Ask VM to swap the slots of the two processes and tell the kernel to
* do the same. If VM is being updated, only perform the kernel
* part of the call. The new instance of VM will do the rest at
* initialization time. If a multi-component update includes VM, let VM
* handle updates at state transfer time and rollbacks afterwards.
*/
if(src_e == VM_PROC_NR) {
if(rs_verbose)
printf("RS: executing sys_update(%d, %d)\n", src_e, dst_e);
r = sys_update(src_e, dst_e,
sys_upd_flags & SF_VM_ROLLBACK ? SYS_UPD_ROLLBACK : 0);
}
else if(!RUPDATE_IS_UPD_VM_MULTI() || RUPDATE_IS_VM_INIT_DONE()) {
if(rs_verbose)
printf("RS: executing vm_update(%d, %d)\n", src_e, dst_e);
r = vm_update(src_e, dst_e, sys_upd_flags);
}
else {
if(rs_verbose)
printf("RS: skipping srv_update(%d, %d)\n", src_e, dst_e);
}
return r;
}
/*===========================================================================*
* update_service *
*===========================================================================*/
int update_service(src_rpp, dst_rpp, swap_flag, sys_upd_flags)
struct rproc **src_rpp;
struct rproc **dst_rpp;
int swap_flag;
int sys_upd_flags;
{
/* Update an existing service. */
int r;
struct rproc *src_rp;
struct rproc *dst_rp;
struct rprocpub *src_rpub;
struct rprocpub *dst_rpub;
int pid;
endpoint_t endpoint;
src_rp = *src_rpp;
dst_rp = *dst_rpp;
src_rpub = src_rp->r_pub;
dst_rpub = dst_rp->r_pub;
if(rs_verbose)
printf("RS: %s updating into %s\n",
srv_to_string(src_rp), srv_to_string(dst_rp));
/* Swap the slots of the two processes when asked to. */
if(swap_flag == RS_SWAP) {
if((r = srv_update(src_rpub->endpoint, dst_rpub->endpoint, sys_upd_flags)) != OK) {
return r;
}
}
/* Swap slots here as well. */
pid = src_rp->r_pid;
endpoint = src_rpub->endpoint;
swap_slot(&src_rp, &dst_rp);
/* Reassign pids and endpoints. */
src_rp->r_pid = dst_rp->r_pid;
src_rp->r_pub->endpoint = dst_rp->r_pub->endpoint;
rproc_ptr[_ENDPOINT_P(src_rp->r_pub->endpoint)] = src_rp;
dst_rp->r_pid = pid;
dst_rp->r_pub->endpoint = endpoint;
rproc_ptr[_ENDPOINT_P(dst_rp->r_pub->endpoint)] = dst_rp;
/* Adjust input pointers. */
*src_rpp = src_rp;
*dst_rpp = dst_rp;
/* Make the new version active. */
activate_service(dst_rp, src_rp);
if(rs_verbose)
printf("RS: %s updated into %s\n",
srv_to_string(src_rp), srv_to_string(dst_rp));
return OK;
}
/*===========================================================================*
* rollback_service *
*===========================================================================*/
void rollback_service(struct rproc **new_rpp, struct rproc **old_rpp)
{
/* Rollback an updated service. */
int r = OK;
/* RS is special, we may only need to swap the slots to rollback. */
if((*old_rpp)->r_pub->endpoint == RS_PROC_NR) {
endpoint_t me = NONE;
char name[20];
int priv_flags, init_flags;
r = sys_whoami(&me, name, sizeof(name), &priv_flags, &init_flags);
assert(r == OK);
if(me != RS_PROC_NR) {
r = vm_update((*new_rpp)->r_pub->endpoint, (*old_rpp)->r_pub->endpoint, SF_VM_ROLLBACK);
if(rs_verbose)
printf("RS: %s performed rollback\n", srv_to_string(*new_rpp));
}
}
else {
int swap_flag = ((*new_rpp)->r_flags & RS_INIT_PENDING ? RS_DONTSWAP : RS_SWAP);
if(rs_verbose)
printf("RS: %s performs rollback\n", srv_to_string(*new_rpp));
if(swap_flag == RS_SWAP) {
/* Freeze the new instance to rollback safely. */
sys_privctl((*new_rpp)->r_pub->endpoint, SYS_PRIV_DISALLOW, NULL);
}
r = update_service(new_rpp, old_rpp, swap_flag, SF_VM_ROLLBACK);
}
assert(r == OK); /* can't fail */
}
/*===========================================================================*
* update_period *
*===========================================================================*/
void update_period(message *m_ptr)
{
/* Periodically check the status of the update (preparation phase). */
clock_t now = m_ptr->m_notify.timestamp;
short has_update_timed_out;
message m;
struct rprocupd *rpupd;
struct rproc *rp;
struct rprocpub *rpub;
rpupd = rupdate.curr_rpupd;
rp = rpupd->rp;
rpub = rp->r_pub;
/* See if a timeout has occurred. */
has_update_timed_out = (rpupd->prepare_maxtime > 0) && (now - rpupd->prepare_tm > rpupd->prepare_maxtime);
/* If an update timed out, end the update process and notify
* the old version that the update has been canceled. From now on, the old
* version will continue executing.
*/
if(has_update_timed_out) {
printf("RS: update failed: maximum prepare time reached\n");
end_update(EINTR, RS_CANCEL);
}
}
/*===========================================================================*
* start_update_prepare *
*===========================================================================*/
int start_update_prepare(int allow_retries)
{
/* Start the preparation phase of the update process. */
struct rprocupd *prev_rpupd, *rpupd;
struct rproc *rp, *new_rp;
int r;
if(!RUPDATE_IS_UPD_SCHEDULED()) {
return EINVAL;
}
if(!rs_is_idle()) {
printf("RS: not idle now, try again\n");
if(!allow_retries) {
abort_update_proc(EAGAIN);
}
return EAGAIN;
}
if(rs_verbose)
printf("RS: starting the preparation phase of the update process\n");
if(rupdate.rs_rpupd) {
assert(rupdate.rs_rpupd == rupdate.last_rpupd);
assert(rupdate.rs_rpupd->rp->r_pub->endpoint == RS_PROC_NR);
assert(!UPD_IS_PREPARING_ONLY(rupdate.rs_rpupd));
}
if(rupdate.vm_rpupd) {
assert(rupdate.vm_rpupd->rp->r_pub->endpoint == VM_PROC_NR);
assert(!UPD_IS_PREPARING_ONLY(rupdate.vm_rpupd));
}
/* If a multi-component update includes VM, fill information about old
* and new endpoints, as well as update flags. VM needs this to complete
* the update internally at state transfer time.
*/
if(RUPDATE_IS_UPD_VM_MULTI()) {
RUPDATE_ITER(rupdate.first_rpupd, prev_rpupd, rpupd,
if(!UPD_IS_PREPARING_ONLY(rpupd)) {
rp = rpupd->rp;
new_rp = rp->r_new_rp;
assert(rp && new_rp);
rp->r_pub->old_endpoint = rpupd->state_endpoint;
rp->r_pub->new_endpoint = rp->r_pub->endpoint;
if(rpupd != rupdate.vm_rpupd && rpupd != rupdate.rs_rpupd) {
rp->r_pub->sys_flags |= SF_VM_UPDATE;
if(rpupd->lu_flags & SEF_LU_NOMMAP) {
rp->r_pub->sys_flags |= SF_VM_NOMMAP;
}
if(!(rpupd->lu_flags & SEF_LU_UNSAFE)) {
if(rs_verbose)
printf("RS: %s pinning memory\n", srv_to_string(rp));
vm_memctl(rp->r_pub->new_endpoint, VM_RS_MEM_PIN, 0, 0);
if(rs_verbose)
printf("RS: %s pinning memory\n", srv_to_string(new_rp));
vm_memctl(new_rp->r_pub->endpoint, VM_RS_MEM_PIN, 0, 0);
}
}
}
);
}
/* Request the first service to prepare for the update. */
if(start_update_prepare_next() == NULL) {
/* If we are done already, end the update now. */
end_update(OK, RS_REPLY);
return ESRCH;
}
return OK;
}
/*===========================================================================*
* start_update_prepare_next *
*===========================================================================*/
struct rprocupd* start_update_prepare_next()
{
/* Request the next service in the update chain to prepare for the update. */
struct rprocupd *rpupd = NULL;
if(!RUPDATE_IS_UPDATING()) {
rpupd = rupdate.first_rpupd;
}
else {
rpupd = rupdate.curr_rpupd->next_rpupd;
}
if(!rpupd) {
return NULL;
}
rupdate.flags |= RS_UPDATING;
while(1) {
rupdate.curr_rpupd = rpupd;
request_prepare_update_service(rupdate.curr_rpupd->rp, rupdate.curr_rpupd->prepare_state);
if(!UPD_IS_PREPARING_ONLY(rpupd)) {
/* Continue only if the current service requires a prepare-only update. */
break;
}
if(!rupdate.curr_rpupd->next_rpupd) {
/* Continue only if there are services left. */
break;
}
rpupd = rupdate.curr_rpupd->next_rpupd;
}
return rpupd;
}
/*===========================================================================*
* start_update *
*===========================================================================*/
int start_update()
{
/* Start the update phase of the update process. */
struct rprocupd *prev_rpupd, *rpupd;
int r, init_ready_pending=0;
if(rs_verbose)
printf("RS: starting a %s-component update process\n",
RUPDATE_IS_UPD_MULTI() ? "multi" : "single");
assert(RUPDATE_IS_UPDATING());
assert(rupdate.num_rpupds > 0);
assert(rupdate.num_init_ready_pending == 0);
assert(rupdate.first_rpupd);
assert(rupdate.last_rpupd);
assert(rupdate.curr_rpupd == rupdate.last_rpupd);
rupdate.flags |= RS_INITIALIZING;
/* Cancel the update for the prepare-only services now. */
RUPDATE_ITER(rupdate.first_rpupd, prev_rpupd, rpupd,
if(UPD_IS_PREPARING_ONLY(rpupd)) {
request_prepare_update_service(rpupd->rp, SEF_LU_STATE_NULL);
}
);
/* Iterate over all the processes scheduled for the update. Update each
* service and initialize the new instance. If VM is part of a
* multi-component live update, initialize VM first.
*/
RUPDATE_ITER(rupdate.first_rpupd, prev_rpupd, rpupd,
rupdate.curr_rpupd = rpupd;
if(!UPD_IS_PREPARING_ONLY(rpupd)) {
init_ready_pending=1;
r = start_srv_update(rpupd);
if(r != OK) {
return r;
}
if(!RUPDATE_IS_UPD_VM_MULTI() || rpupd == rupdate.vm_rpupd) {
r = complete_srv_update(rpupd);
if(r != OK) {
return r;
}
}
}
);
/* End update if there is nothing more to do. */
if (!init_ready_pending) {
end_update(OK, 0);
return OK;
}
/* Handle multi-component live updates including VM. */
if(RUPDATE_IS_UPD_VM_MULTI()) {
message m;
/* Check VM initialization, assume failure after timeout. */
if (rs_verbose)
printf("RS: waiting for VM to initialize...\n");
r = rs_receive_ticks(VM_PROC_NR, &m, NULL, UPD_INIT_MAXTIME(rupdate.vm_rpupd));
if(r != OK || m.m_type != RS_INIT || m.m_rs_init.result != OK) {
r = (r == OK && m.m_type == RS_INIT ? m.m_rs_init.result : EINTR);
m.m_source = VM_PROC_NR;
m.m_type = RS_INIT;
m.m_rs_init.result = r;
}
do_init_ready(&m);
/* If initialization was successfull, complete the update. */
if(r == OK) {
/* Reply and unblock VM immediately. */
m.m_type = OK;
reply(VM_PROC_NR, NULL, &m);
/* Initialize other services. */
RUPDATE_ITER(rupdate.first_rpupd, prev_rpupd, rpupd,
if(!UPD_IS_PREPARING_ONLY(rpupd) && rpupd != rupdate.vm_rpupd) {
r = complete_srv_update(rpupd);
if(r != OK) {
return r;
}
}
);
}
}
return OK;
}
/*===========================================================================*
* start_srv_update *
*===========================================================================*/
int start_srv_update(struct rprocupd *rpupd)
{
/* Start updating a single service given its update descriptor. */
struct rproc *old_rp, *new_rp;
int r, sys_upd_flags = 0;
old_rp = rpupd->rp;
new_rp = old_rp->r_new_rp;
assert(old_rp && new_rp);
if(rs_verbose)
printf("RS: %s starting the %s\n", srv_to_string(old_rp), srv_upd_to_string(rpupd));
rupdate.num_init_ready_pending++;
new_rp->r_flags |= RS_INITIALIZING;
new_rp->r_flags |= RS_INIT_PENDING;
if(rpupd->lu_flags & SEF_LU_NOMMAP) {
sys_upd_flags |= SF_VM_NOMMAP;
}
/* Perform the update, skip for RS. */
if(old_rp->r_pub->endpoint != RS_PROC_NR) {
r = update_service(&old_rp, &new_rp, RS_SWAP, sys_upd_flags);
if(r != OK) {
end_update(r, RS_REPLY);
printf("RS: update failed: error %d\n", r);
return r;
}
}
return OK;
}
/*===========================================================================*
* complete_srv_update *
*===========================================================================*/
int complete_srv_update(struct rprocupd *rpupd)
{
/* Complete update of a service given its update descriptor. */
struct rproc *old_rp, *new_rp;
int r;
old_rp = rpupd->rp;
new_rp = old_rp->r_new_rp;
assert(old_rp && new_rp);
if(rs_verbose)
printf("RS: %s completing the %s\n", srv_to_string(old_rp), srv_upd_to_string(rpupd));
new_rp->r_flags &= ~RS_INIT_PENDING;
/* If RS itself is updating, yield control to the new version immediately. */
if(old_rp->r_pub->endpoint == RS_PROC_NR) {
r = init_service(new_rp, SEF_INIT_LU, rpupd->init_flags);
if(r != OK) {
panic("unable to initialize the new RS instance: %d", r);
}
if(rs_verbose)
printf("RS: %s is the new RS instance we'll yield control to\n", srv_to_string(new_rp));
r = sys_privctl(new_rp->r_pub->endpoint, SYS_PRIV_YIELD, NULL);
if(r != OK) {
panic("unable to yield control to the new RS instance: %d", r);
}
/* If we get this far, the new version failed to initialize. Rollback. */
rollback_service(&new_rp, &old_rp);
end_update(ERESTART, RS_REPLY);
printf("RS: update failed: state transfer failed for the new RS instance\n");
return ERESTART;
}
/* Let the new version run. */
r = run_service(new_rp, SEF_INIT_LU, rpupd->init_flags);
if(r != OK) {
/* Something went wrong. Rollback. */
rollback_service(&new_rp, &old_rp);
end_update(r, RS_REPLY);
printf("RS: update failed: error %d\n", r);
return r;
}
return OK;
}
/*===========================================================================*
* abort_update_proc *
*===========================================================================*/
int abort_update_proc(int reason)
{
/* This function is called to abort a scheduled/in-progress update process
* indiscriminately. If the update is in progress, simply pretend the
* current service is causing premature termination of the update.
*/
int is_updating = RUPDATE_IS_UPDATING();
assert(reason != OK);
if(!is_updating && !RUPDATE_IS_UPD_SCHEDULED()) {
return EINVAL;
}
if(rs_verbose)
printf("RS: aborting the %s update process prematurely\n",
is_updating ? "in-progress" : "scheduled");
if(!is_updating) {
rupdate_clear_upds();
return OK;
}
if(rupdate.flags & RS_INITIALIZING) {
/* Pretend the current service under update failed to initialize. */
end_update(reason, RS_REPLY);
}
else {
/* Pretend the current service under update failed to prepare. */
end_update(reason, RS_CANCEL);
}
return OK;
}
/*===========================================================================*
* end_update_curr *
*===========================================================================*/
static void end_update_curr(struct rprocupd *rpupd, int result, int reply_flag)
{
/* Execute the requested action on the current service under update. */
struct rproc *old_rp, *new_rp;
assert(rpupd == rupdate.curr_rpupd);
old_rp = rpupd->rp;
new_rp = old_rp->r_new_rp;
assert(old_rp && new_rp);
if(result != OK && SRV_IS_UPDATING_AND_INITIALIZING(new_rp) && rpupd != rupdate.rs_rpupd) {
/* Rollback in case of failures at initialization time. */
rollback_service(&new_rp, &old_rp);
}
end_srv_update(rpupd, result, reply_flag);
}
/*===========================================================================*
* end_update_before_prepare *
*===========================================================================*/
static void end_update_before_prepare(struct rprocupd *rpupd, int result)
{
/* The service is still waiting for the update. Cleanup the new version and
* keep the old version running.
*/
struct rproc *old_rp, *new_rp;
assert(result != OK);
old_rp = rpupd->rp;
new_rp = old_rp->r_new_rp;
assert(old_rp && new_rp);
cleanup_service(new_rp);
}
/*===========================================================================*
* end_update_prepare_done *
*===========================================================================*/
static void end_update_prepare_done(struct rprocupd *rpupd, int result)
{
/* The service is blocked after preparing for the update. Unblock it
* and cleanup the new version.
*/
assert(!RUPDATE_IS_INITIALIZING());
assert(result != OK);
assert(!(rpupd->rp->r_flags & RS_INITIALIZING));
end_srv_update(rpupd, result, RS_REPLY);
}
/*===========================================================================*
* end_update_initializing *
*===========================================================================*/
static void end_update_initializing(struct rprocupd *rpupd, int result)
{
/* The service is initializing after a live udate. Cleanup the version that
* has to die out and let the other version run.
*/
struct rproc *old_rp, *new_rp;
old_rp = rpupd->rp;
new_rp = old_rp->r_new_rp;
assert(old_rp && new_rp);
assert(SRV_IS_UPDATING_AND_INITIALIZING(new_rp));
if(result != OK && rpupd != rupdate.rs_rpupd) {
/* Rollback in case of failures at initialization time. */
rollback_service(&new_rp, &old_rp);
}
end_srv_update(rpupd, result, RS_REPLY);
}
/*===========================================================================*
* end_update_rev_iter *
*===========================================================================*/
static void end_update_rev_iter(int result, int reply_flag,
struct rprocupd *skip_rpupd, struct rprocupd *only_rpupd)
{
/* End the update for all the requested services. */
struct rprocupd *prev_rpupd, *rpupd;
short is_curr, is_before_curr, is_after_curr;
is_after_curr = 1;
RUPDATE_REV_ITER(rupdate.last_rpupd, prev_rpupd, rpupd,
is_curr = (rupdate.curr_rpupd == rpupd);
is_after_curr = is_after_curr && !is_curr;
if(!UPD_IS_PREPARING_ONLY(rpupd)) {
short is_before_prepare;
short is_prepare_done;
short is_initializing;
is_before_curr = !is_curr && !is_after_curr;
if(RUPDATE_IS_INITIALIZING()) {
is_before_prepare = 0;
is_prepare_done = is_after_curr;
is_initializing = is_before_curr;
}
else {
is_before_prepare = is_after_curr;
is_prepare_done = is_before_curr;
is_initializing = 0;
}
if((!skip_rpupd || rpupd != skip_rpupd) && (!only_rpupd || rpupd == only_rpupd)) {
/* Analyze different cases. */
if(is_curr) {
end_update_curr(rpupd, result, reply_flag);
}
else if(is_before_prepare) {
end_update_before_prepare(rpupd, result);
}
else if(is_prepare_done) {
end_update_prepare_done(rpupd, result);
}
else {
assert(is_initializing);
end_update_initializing(rpupd, result);
}
}
}
);
}
/*===========================================================================*
* end_update_debug *
*===========================================================================*/
void end_update_debug(char *file, int line,
int result, int reply_flag)
{
/* End an in-progress update process. */
struct rprocupd *prev_rpupd, *rpupd, *rpupd_it;
struct rproc *rp, *old_rp, *new_rp;
int i, r, slot_nr;
assert(RUPDATE_IS_UPDATING());
if(rs_verbose)
printf("RS: %s ending the update: result=%d, reply=%d at %s:%d\n",
srv_to_string(rupdate.curr_rpupd->rp), result, (reply_flag==RS_REPLY),
file, line);
/* If the new instance of RS is active and the update failed, ending
* the update couldn't be any easier.
*/
if(result != OK && RUPDATE_IS_RS_INIT_DONE()) {
if(rs_verbose)
printf("RS: update failed, new RS instance will now exit\n");
exit(1);
}
/* If VM is updated as part of a multi-component live update and something
* goes wrong after VM has completed initialization, rollback is only
* supported in a best-effort way in unsafe mode. The new VM instance might
* have important state changes that won't be reflected in the old version
* once we rollback.
*/
if(result != OK && RUPDATE_IS_UPD_VM_MULTI() && RUPDATE_IS_VM_INIT_DONE() && (rupdate.vm_rpupd->lu_flags & SEF_LU_UNSAFE)) {
printf("RS: Warning rollbacking in unsafe multi-component update including VM!\n");
}
/* Handle prepare-only services first: simply cancel the update. */
RUPDATE_ITER(rupdate.first_rpupd, prev_rpupd, rpupd,
if(UPD_IS_PREPARING_ONLY(rpupd)) {
if(!RUPDATE_IS_INITIALIZING()) {
request_prepare_update_service(rpupd->rp, SEF_LU_STATE_NULL);
}
rpupd->rp->r_flags &= ~RS_PREPARE_DONE;
}
);
/* Handle all the other services now, VM always last to support rollback. */
end_update_rev_iter(result, reply_flag, rupdate.vm_rpupd, NULL);
if(rupdate.vm_rpupd) {
end_update_rev_iter(result, reply_flag, NULL, rupdate.vm_rpupd);
}
/* End the update and complete initialization in case of success. */
RUPDATE_ITER(rupdate.first_rpupd, prev_rpupd, rpupd,
if(prev_rpupd) {
rupdate_upd_clear(prev_rpupd);
}
if(result == OK && !UPD_IS_PREPARING_ONLY(rpupd)) {
/* The rp pointer points to the new instance in this case. */
new_rp = rpupd->rp;
end_srv_init(new_rp);
}
);
late_reply(rupdate.last_rpupd->rp, result);
rupdate_upd_clear(rupdate.last_rpupd);
RUPDATE_CLEAR();
/* Clear all the old/new endpoints and update flags in the public entries. */
for(slot_nr = 0; slot_nr < NR_SYS_PROCS; slot_nr++) {
rp = &rproc[slot_nr];
rp->r_pub->old_endpoint = NONE;
rp->r_pub->new_endpoint = NONE;
rp->r_pub->sys_flags &= ~(SF_VM_UPDATE|SF_VM_ROLLBACK|SF_VM_NOMMAP);
}
}
/*===========================================================================*
* end_srv_update *
*===========================================================================*/
void end_srv_update(struct rprocupd *rpupd, int result, int reply_flag)
{
/* End the update for the given service. There are two possibilities:
* 1) the update succeeded. In that case, cleanup the old version and mark the
* new version as no longer under update.
* 2) the update failed. In that case, cleanup the new version and mark the old
* version as no longer under update. Eventual late ready to update
* messages (if any) will simply be ignored and the service can
* continue executing. In addition, reset the check timestamp, so that if the
* service has a period, a status request will be forced in the next period.
*/
struct rproc *old_rp, *new_rp, *exiting_rp, *surviving_rp;
struct rproc **rps;
struct rprocpub *rpub;
int nr_rps, i;
old_rp = rpupd->rp;
new_rp = old_rp->r_new_rp;
assert(old_rp && new_rp);
if(result == OK && new_rp->r_pub->endpoint == VM_PROC_NR && RUPDATE_IS_UPD_MULTI()) {
/* VM has already been replied to in case of multi-component live update.
* Send an update cancel message to trigger cleanup.
*/
reply_flag = RS_CANCEL;
}
if(rs_verbose)
printf("RS: ending update from %s to %s with result=%d, reply=%d\n",
srv_to_string(old_rp), srv_to_string(new_rp), result, (reply_flag==RS_REPLY));
/* Decide which version has to die out and which version has to survive. */
surviving_rp = (result == OK ? new_rp : old_rp);
exiting_rp = (result == OK ? old_rp : new_rp);
surviving_rp->r_flags &= ~RS_INITIALIZING;
surviving_rp->r_check_tm = 0;
getticks(&surviving_rp->r_alive_tm);
/* Keep track of the surviving process in the update descriptor from now on. */
rpupd->rp = surviving_rp;
/* Unlink the two versions. */
old_rp->r_new_rp = NULL;
new_rp->r_old_rp = NULL;
/* Mark the version that has to survive as no longer updating and
* reply when asked to.
*/
surviving_rp->r_flags &= ~(RS_UPDATING|RS_PREPARE_DONE|RS_INIT_DONE|RS_INIT_PENDING);
if(reply_flag == RS_REPLY) {
message m;
m.m_type = result;
reply(surviving_rp->r_pub->endpoint, surviving_rp, &m);
}
else if(reply_flag == RS_CANCEL) {
if(!(surviving_rp->r_flags & RS_TERMINATED)) {
request_prepare_update_service(surviving_rp, SEF_LU_STATE_NULL);
}
}
/* Cleanup or detach the version that has to die out. */
get_service_instances(exiting_rp, &rps, &nr_rps);
for(i=0;i<nr_rps;i++) {
if(rps[i] == old_rp && (rpupd->lu_flags & SEF_LU_DETACHED)) {
message m;
m.m_type = EDEADEPT;
rps[i]->r_flags |= RS_CLEANUP_DETACH;
cleanup_service(rps[i]);
reply(rps[i]->r_pub->endpoint, rps[i], &m);
}
else {
cleanup_service(rps[i]);
}
}
if(rs_verbose)
printf("RS: %s ended the %s\n", srv_to_string(surviving_rp),
srv_upd_to_string(rpupd));
}

251
minix/servers/rs/utility.c
View file

@ -10,21 +10,19 @@
#include <minix/sched.h>
#include "kernel/proc.h"
#define PRINT_SEP() printf("---------------------------------------------------------------------------------\n")
/*===========================================================================*
* init_service *
*===========================================================================*/
int init_service(rp, type)
struct rproc *rp; /* pointer to process slot */
int type; /* type of initialization */
int init_service(struct rproc *rp, int type, int flags)
{
int r;
message m;
struct rprocpub *rpub;
endpoint_t old_endpoint;
rpub = rp->r_pub;
rp->r_flags |= RS_INITIALIZING; /* now initializing */
getticks(&rp->r_alive_tm);
rp->r_check_tm = rp->r_alive_tm + 1; /* expect reply within period */
/* In case of RS initialization, we are done. */
@ -35,19 +33,29 @@ int type; /* type of initialization */
/* Determine the old endpoint if this is a new instance. */
old_endpoint = NONE;
if(rp->r_old_rp) {
old_endpoint = rp->r_old_rp->r_pub->endpoint;
old_endpoint = rp->r_upd.state_endpoint;
}
else if(rp->r_prev_rp) {
old_endpoint = rp->r_prev_rp->r_pub->endpoint;
}
/* Check flags. */
if(rp->r_pub->sys_flags & SF_USE_SCRIPT) {
flags |= SEF_INIT_SCRIPT_RESTART;
}
/* Send initialization message. */
memset(&m, 0, sizeof(message));
m.m_type = RS_INIT;
m.m_rs_init.type = type;
m.m_rs_init.type = (short) type;
m.m_rs_init.flags = flags;
m.m_rs_init.rproctab_gid = rinit.rproctab_gid;
m.m_rs_init.old_endpoint = old_endpoint;
r = asynsend(rpub->endpoint, &m);
m.m_rs_init.restarts = (short) rp->r_restarts+1;
m.m_rs_init.buff_addr = rp->r_map_prealloc_addr;
m.m_rs_init.buff_len = rp->r_map_prealloc_len;
rp->r_map_prealloc_addr = 0;
rp->r_map_prealloc_len = 0;
r = rs_asynsend(rp, &m, 0);
return r;
}
@ -113,15 +121,14 @@ int is_init; /* set when initializing a call mask */
}
/*===========================================================================*
* srv_to_string *
* srv_to_string_gen *
*===========================================================================*/
char* srv_to_string(rp)
struct rproc *rp; /* pointer to process slot */
char* srv_to_string_gen(struct rproc *rp, int is_verbose)
{
struct rprocpub *rpub;
int slot_nr;
char *srv_string;
static char srv_string_pool[3][RS_MAX_LABEL_LEN + (DEBUG ? 256 : 64)];
static char srv_string_pool[3][RS_MAX_LABEL_LEN + 256];
static int srv_string_pool_index = 0;
rpub = rp->r_pub;
@ -130,26 +137,94 @@ struct rproc *rp; /* pointer to process slot */
srv_string_pool_index = (srv_string_pool_index + 1) % 3;
#define srv_str(cmd) ((cmd) == NULL || (cmd)[0] == '\0' ? "_" : (cmd))
#define srv_ep_str(rp) (itoa((rp)->r_pub->endpoint))
#define srv_active_str(rp) ((rp)->r_flags & RS_ACTIVE ? "*" : " ")
#define srv_version_str(rp) ((rp)->r_new_rp || (rp)->r_next_rp ? "-" : \
((rp)->r_old_rp || (rp)->r_prev_rp ? "+" : " "))
#if DEBUG
sprintf(srv_string, "service '%s'%s%s(slot %d, ep %d, pid %d, cmd %s, script %s, proc %s, major %d, flags 0x%03x, sys_flags 0x%02x)",
rpub->label, srv_active_str(rp), srv_version_str(rp),
slot_nr, rpub->endpoint, rp->r_pid, srv_str(rp->r_cmd),
srv_str(rp->r_script), srv_str(rpub->proc_name), rpub->dev_nr,
rp->r_flags, rpub->sys_flags);
#else
sprintf(srv_string, "service '%s'%s%s(slot %d, ep %d, pid %d)",
rpub->label, srv_active_str(rp), srv_version_str(rp),
slot_nr, rpub->endpoint, rp->r_pid);
#endif
if(is_verbose) {
sprintf(srv_string, "service '%s'%s%s(slot %d, ep %d, pid %d, cmd %s, script %s, proc %s, major %d, flags 0x%03x, sys_flags 0x%02x)",
rpub->label, srv_active_str(rp), srv_version_str(rp),
slot_nr, rpub->endpoint, rp->r_pid, srv_str(rp->r_cmd),
srv_str(rp->r_script), srv_str(rpub->proc_name), rpub->dev_nr,
rp->r_flags, rpub->sys_flags);
}
else {
sprintf(srv_string, "service '%s'%s%s(slot %d, ep %d, pid %d)",
rpub->label, srv_active_str(rp), srv_version_str(rp),
slot_nr, rpub->endpoint, rp->r_pid);
}
#undef srv_str
#undef srv_active_str
#undef srv_version_str
return srv_string;
}
/*===========================================================================*
* srv_upd_to_string *
*===========================================================================*/
char* srv_upd_to_string(struct rprocupd *rpupd)
{
static char srv_upd_string[256];
struct rprocpub *rpub, *next_rpub, *prev_rpub;
rpub = rpupd->rp ? rpupd->rp->r_pub : NULL;
next_rpub = rpupd->next_rpupd && rpupd->next_rpupd->rp ? rpupd->next_rpupd->rp->r_pub : NULL;
prev_rpub = rpupd->prev_rpupd && rpupd->prev_rpupd->rp ? rpupd->prev_rpupd->rp->r_pub : NULL;
#define srv_ep(RPUB) (RPUB ? (RPUB)->endpoint : -1)
#define srv_upd_luflag_c(F) (rpupd->lu_flags & F ? '1' : '0')
#define srv_upd_iflag_c(F) (rpupd->init_flags & F ? '1' : '0')
sprintf(srv_upd_string, "update (lu_flags(SAMPUNDRV)=%c%c%c%c%c%c%c%c%c, init_flags=(FCTD)=%c%c%c%c, state %d (%s), tm %lu, maxtime %lu, endpoint %d, state_data_gid %d, prev_ep %d, next_ep %d)",
srv_upd_luflag_c(SEF_LU_SELF), srv_upd_luflag_c(SEF_LU_ASR),
srv_upd_luflag_c(SEF_LU_MULTI), srv_upd_luflag_c(SEF_LU_PREPARE_ONLY),
srv_upd_luflag_c(SEF_LU_UNSAFE), srv_upd_luflag_c(SEF_LU_NOMMAP),
srv_upd_luflag_c(SEF_LU_DETACHED), srv_upd_luflag_c(SEF_LU_INCLUDES_RS),
srv_upd_luflag_c(SEF_LU_INCLUDES_VM), srv_upd_iflag_c(SEF_INIT_FAIL),
srv_upd_iflag_c(SEF_INIT_CRASH), srv_upd_iflag_c(SEF_INIT_TIMEOUT),
srv_upd_iflag_c(SEF_INIT_DEFCB), rpupd->prepare_state,
rpupd->prepare_state_data.eval_addr ? rpupd->prepare_state_data.eval_addr : "", rpupd->prepare_tm,
rpupd->prepare_maxtime, srv_ep(rpub), rpupd->prepare_state_data_gid,
srv_ep(prev_rpub), srv_ep(next_rpub));
return srv_upd_string;
}
/*===========================================================================*
* rs_asynsend *
*===========================================================================*/
int rs_asynsend(struct rproc *rp, message *m_ptr, int no_reply)
{
struct rprocpub *rpub;
int r;
rpub = rp->r_pub;
if(no_reply) {
r = asynsend3(rpub->endpoint, m_ptr, AMF_NOREPLY);
}
else {
r = asynsend(rpub->endpoint, m_ptr);
}
if(rs_verbose)
printf("RS: %s being asynsent to with message type %d, noreply=%d, result=%d\n",
srv_to_string(rp), m_ptr->m_type, no_reply, r);
return r;
}
/*===========================================================================*
* rs_receive_ticks *
*===========================================================================*/
int rs_receive_ticks(endpoint_t src, message *m_ptr,
int *status_ptr, int ticks)
{
printf("RS: rs_receive_ticks not implemented\n");
return ENOSYS;
}
/*===========================================================================*
* reply *
*===========================================================================*/
@ -166,7 +241,7 @@ message *m_ptr; /* reply message */
}
if(rs_verbose && rp)
printf("RS: %s being replied to\n", srv_to_string(rp));
printf("RS: %s being replied to with message type %d\n", srv_to_string(rp), m_ptr->m_type);
r = ipc_sendnb(who, m_ptr); /* send the message */
if (r != OK)
@ -265,3 +340,125 @@ int update_sig_mgrs(struct rproc *rp, endpoint_t sig_mgr,
return OK;
}
/*===========================================================================*
* rs_is_idle *
*===========================================================================*/
int rs_is_idle()
{
int slot_nr;
struct rproc *rp;
for (slot_nr = 0; slot_nr < NR_SYS_PROCS; slot_nr++) {
rp = &rproc[slot_nr];
if (!(rp->r_flags & RS_IN_USE)) {
continue;
}
if(!RS_SRV_IS_IDLE(rp)) {
return 0;
}
}
return 1;
}
/*===========================================================================*
* rs_idle_period *
*===========================================================================*/
void rs_idle_period()
{
struct rproc *rp;
struct rprocpub *rpub;
int r;
/* Not much to do when RS is not idle. */
if(!rs_is_idle()) {
return;
}
/* Cleanup dead services. */
for (rp=BEG_RPROC_ADDR; rp<END_RPROC_ADDR; rp++) {
if((rp->r_flags & (RS_IN_USE|RS_DEAD)) == (RS_IN_USE|RS_DEAD)) {
cleanup_service(rp);
}
}
/* Create missing replicas when necessary. */
for (rp=BEG_RPROC_ADDR; rp<END_RPROC_ADDR; rp++) {
rpub = rp->r_pub;
if((rp->r_flags & RS_ACTIVE) && (rpub->sys_flags & SF_USE_REPL) && rp->r_next_rp == NULL) {
if(rpub->endpoint == VM_PROC_NR && (rp->r_old_rp || rp->r_new_rp)) {
/* Only one replica at the time for VM. */
continue;
}
if ((r = clone_service(rp, RST_SYS_PROC, 0)) != OK) {
printf("RS: warning: unable to clone %s (error %d)\n",
srv_to_string(rp), r);
}
}
}
}
/*===========================================================================*
* print_services_status *
*===========================================================================*/
void print_services_status()
{
int slot_nr;
struct rproc *rp;
int num_services = 0;
int num_service_instances = 0;
int is_verbose = 1;
PRINT_SEP();
printf("Printing information about all the system service instances:\n");
PRINT_SEP();
for (slot_nr = 0; slot_nr < NR_SYS_PROCS; slot_nr++) {
rp = &rproc[slot_nr];
if (!(rp->r_flags & RS_IN_USE)) {
continue;
}
if (rp->r_flags & RS_ACTIVE) {
num_services++;
}
num_service_instances++;
printf("%s\n", srv_to_string_gen(rp, is_verbose));
}
PRINT_SEP();
printf("Found %d service instances, of which %d are active services\n",
num_service_instances, num_services);
PRINT_SEP();
}
/*===========================================================================*
* print_update_status *
*===========================================================================*/
void print_update_status()
{
struct rprocupd *prev_rpupd, *rpupd;
int is_updating = RUPDATE_IS_UPDATING();
int i;
#define rupdate_flag_c(F) (rupdate.flags & F ? '1' : '0')
if(!is_updating && !RUPDATE_IS_UPD_SCHEDULED()) {
PRINT_SEP();
printf("No update is in progress or scheduled\n");
PRINT_SEP();
return;
}
PRINT_SEP();
i = 1;
printf("A %s-component update is %s, flags(UIRV)=%c%c%c%c:\n", RUPDATE_IS_UPD_MULTI() ? "multi" : "single",
is_updating ? "in progress" : "scheduled",
rupdate_flag_c(RS_UPDATING), rupdate_flag_c(RS_INITIALIZING),
rupdate.rs_rpupd ? '1' : '0', rupdate.vm_rpupd ? '1' : '0');
PRINT_SEP();
RUPDATE_ITER(rupdate.first_rpupd, prev_rpupd, rpupd,
printf("%d. %s %s %s\n", i++, srv_to_string(rpupd->rp),
is_updating ? "updating with" : "scheduled for",
srv_upd_to_string(rpupd));
);
PRINT_SEP();
#undef rupdate_flag_c
}

15
minix/servers/vm/rs.c
View file

@ -276,20 +276,11 @@ int do_rs_memctl(message *m_ptr)
switch(req)
{
case VM_RS_MEM_PIN:
/* Do not perform VM_RS_MEM_PIN yet - it costs the full
* size of the RS stack (64MB by default) in memory,
* and it's needed for functionality that isn't complete /
* merged in current Minix (surviving VM crashes).
*/
#if 0
/* Only actually pin RS memory if VM can recover from crashes (saves memory). */
if (num_vm_instances <= 1)
return OK;
r = map_pin_memory(vmp);
return r;
#else
return OK;
#endif
case VM_RS_MEM_MAKE_VM:
r = rs_memctl_make_vm_instance(vmp);
return r;