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Don't reply to the caller on RS_DOWN until process is actually dead -

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otherwise (e.g.) mounts right after an unmount of the same device don't
work (duplicate label).
This commit is contained in:
Ben Gras 2007-01-22 16:44:03 +00:00
parent f9e4768eb4
commit 73e4e31376
2 changed files with 18 additions and 2 deletions
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18
servers/rs/manager.c
View file

@ -379,8 +379,13 @@ PUBLIC int do_down(message *m_ptr)
}
proc = _ENDPOINT_P(rp->r_proc_nr_e);
rproc_ptr[proc] = NULL;
return(OK);
}
return(OK);
/* Late reply - send a reply when process dies. */
rp->r_flags |= RS_LATEREPLY;
rp->r_caller = m_ptr->m_source;
return EDONTREPLY;
}
}
#if VERBOSE
@ -521,13 +526,22 @@ PUBLIC void do_exit(message *m_ptr)
rp->r_pid= -1;
if ((rp->r_flags & RS_EXITING) || shutting_down) {
rp->r_flags = 0; /* release slot */
/* No reply sent to RS_DOWN yet. */
if(rp->r_flags & RS_LATEREPLY) {
message rsm;
rsm.m_type = OK;
send(rp->r_caller, &rsm);
}
/* Release slot. */
rp->r_flags = 0;
if (rp->r_exec)
{
free(rp->r_exec);
rp->r_exec= NULL;
}
rproc_ptr[proc] = NULL;
}
else if(rp->r_flags & RS_REFRESHING) {
rp->r_restarts = -1; /* reset counter */

2
servers/rs/manager.h
View file

@ -33,6 +33,7 @@ extern struct rproc {
clock_t r_check_tm; /* timestamp of last check */
clock_t r_alive_tm; /* timestamp of last heartbeat */
clock_t r_stop_tm; /* timestamp of SIGTERM signal */
endpoint_t r_caller; /* RS_LATEREPLY caller */
char *r_exec; /* Executable image */
size_t r_exec_len; /* Length of image */
@ -68,6 +69,7 @@ extern struct rproc *rproc_ptr[NR_PROCS];
#define RS_NOPINGREPLY 0x010 /* driver failed to reply to a ping request */
#define RS_KILLED 0x020 /* driver is killed */
#define RS_CRASHED 0x040 /* driver crashed */
#define RS_LATEREPLY 0x080 /* no reply sent to RS_DOWN caller yet */
/* Constants determining RS period and binary exponential backoff. */
#define RS_DELTA_T 60 /* check every T ticks */