253 lines
7.8 KiB
C
253 lines
7.8 KiB
C
/* This file contains some utility routines for RS.
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*
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* Changes:
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* Nov 22, 2009: Created (Cristiano Giuffrida)
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*/
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#include "inc.h"
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#include <assert.h>
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#include <minix/sched.h>
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#include "kernel/proc.h"
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/*===========================================================================*
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* init_service *
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*===========================================================================*/
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PUBLIC int init_service(rp, type)
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struct rproc *rp; /* pointer to process slot */
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int type; /* type of initialization */
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{
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int r;
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message m;
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struct rprocpub *rpub;
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endpoint_t old_endpoint;
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rpub = rp->r_pub;
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rp->r_flags |= RS_INITIALIZING; /* now initializing */
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rp->r_check_tm = rp->r_alive_tm + 1; /* expect reply within period */
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/* In case of RS initialization, we are done. */
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if(rp->r_priv.s_flags & ROOT_SYS_PROC) {
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return OK;
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}
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/* Determine the old endpoint if this is a new instance. */
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old_endpoint = NONE;
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if(rp->r_old_rp) {
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old_endpoint = rp->r_old_rp->r_pub->endpoint;
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}
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else if(rp->r_prev_rp) {
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old_endpoint = rp->r_prev_rp->r_pub->endpoint;
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}
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/* Send initialization message. */
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m.m_type = RS_INIT;
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m.RS_INIT_TYPE = type;
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m.RS_INIT_RPROCTAB_GID = rinit.rproctab_gid;
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m.RS_INIT_OLD_ENDPOINT = old_endpoint;
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r = asynsend(rpub->endpoint, &m);
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return r;
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}
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/*===========================================================================*
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* fill_call_mask *
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*===========================================================================*/
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PUBLIC void fill_call_mask(calls, tot_nr_calls, call_mask, call_base, is_init)
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int *calls; /* the unordered set of calls */
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int tot_nr_calls; /* the total number of calls */
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bitchunk_t *call_mask; /* the call mask to fill in */
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int call_base; /* the base offset for the calls */
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int is_init; /* set when initializing a call mask */
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{
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/* Fill a call mask from an unordered set of calls. */
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int i;
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int call_mask_size, nr_calls;
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call_mask_size = BITMAP_CHUNKS(tot_nr_calls);
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/* Count the number of calls to fill in. */
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nr_calls = 0;
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for(i=0; calls[i] != NULL_C; i++) {
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nr_calls++;
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}
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/* See if all calls are allowed and call mask must be completely filled. */
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if(nr_calls == 1 && calls[0] == ALL_C) {
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for(i=0; i < call_mask_size; i++) {
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call_mask[i] = (~0);
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}
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}
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else {
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/* When initializing, reset the mask first. */
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if(is_init) {
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for(i=0; i < call_mask_size; i++) {
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call_mask[i] = 0;
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}
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}
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/* Enter calls bit by bit. */
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for(i=0; i < nr_calls; i++) {
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SET_BIT(call_mask, calls[i] - call_base);
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}
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}
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}
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/*===========================================================================*
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* srv_to_string *
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*===========================================================================*/
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PUBLIC char* srv_to_string(rp)
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struct rproc *rp; /* pointer to process slot */
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{
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struct rprocpub *rpub;
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int slot_nr;
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char *srv_string;
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static char srv_string_pool[3][RS_MAX_LABEL_LEN + (DEBUG ? 256 : 64)];
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static int srv_string_pool_index = 0;
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rpub = rp->r_pub;
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slot_nr = rp - rproc;
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srv_string = srv_string_pool[srv_string_pool_index];
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srv_string_pool_index = (srv_string_pool_index + 1) % 3;
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#define srv_str(cmd) ((cmd) == NULL || (cmd)[0] == '\0' ? "_" : (cmd))
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#define srv_ep_str(rp) (itoa((rp)->r_pub->endpoint))
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#define srv_active_str(rp) ((rp)->r_flags & RS_ACTIVE ? "*" : " ")
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#define srv_version_str(rp) ((rp)->r_new_rp || (rp)->r_next_rp ? "-" : \
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((rp)->r_old_rp || (rp)->r_prev_rp ? "+" : " "))
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#if DEBUG
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sprintf(srv_string, "service '%s'%s%s(slot %d, ep %d, pid %d, cmd %s, script %s, proc %s, major %d, style %d, flags 0x%03x, sys_flags 0x%02x)",
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rpub->label, srv_active_str(rp), srv_version_str(rp),
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slot_nr, rpub->endpoint, rp->r_pid, srv_str(rp->r_cmd),
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srv_str(rp->r_script), srv_str(rpub->proc_name), rpub->dev_nr,
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rpub->dev_style, rp->r_flags, rpub->sys_flags);
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#else
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sprintf(srv_string, "service '%s'%s%s(slot %d, ep %d, pid %d)",
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rpub->label, srv_active_str(rp), srv_version_str(rp),
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slot_nr, rpub->endpoint, rp->r_pid);
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#endif
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return srv_string;
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}
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/*===========================================================================*
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* reply *
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*===========================================================================*/
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PUBLIC void reply(who, rp, m_ptr)
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endpoint_t who; /* replyee */
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struct rproc *rp; /* replyee slot (if any) */
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message *m_ptr; /* reply message */
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{
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int r; /* send status */
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/* No need to actually reply to RS */
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if(who == RS_PROC_NR) {
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return;
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}
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if(rs_verbose && rp)
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printf("RS: %s being replied to\n", srv_to_string(rp));
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r = sendnb(who, m_ptr); /* send the message */
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if (r != OK)
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printf("RS: unable to send reply to %d: %d\n", who, r);
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}
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/*===========================================================================*
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* late_reply *
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*===========================================================================*/
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PUBLIC void late_reply(rp, code)
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struct rproc *rp; /* pointer to process slot */
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int code; /* status code */
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{
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/* If a caller is waiting for a reply, unblock it. */
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struct rprocpub *rpub;
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rpub = rp->r_pub;
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if(rp->r_flags & RS_LATEREPLY) {
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message m;
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m.m_type = code;
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if(rs_verbose)
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printf("RS: %s late reply %d to %d for request %d\n",
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srv_to_string(rp), code, rp->r_caller, rp->r_caller_request);
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reply(rp->r_caller, NULL, &m);
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rp->r_flags &= ~RS_LATEREPLY;
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}
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}
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/*===========================================================================*
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* rs_isokendpt *
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*===========================================================================*/
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PUBLIC int rs_isokendpt(endpoint_t endpoint, int *proc)
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{
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*proc = _ENDPOINT_P(endpoint);
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if(*proc < -NR_TASKS || *proc >= NR_PROCS)
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return EINVAL;
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return OK;
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}
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/*===========================================================================*
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* sched_init_proc *
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*===========================================================================*/
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PUBLIC int sched_init_proc(struct rproc *rp)
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{
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int s;
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int is_usr_proc;
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/* Make sure user processes have no scheduler. PM deals with them. */
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is_usr_proc = !(rp->r_priv.s_flags & SYS_PROC);
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if(is_usr_proc) assert(rp->r_scheduler == NONE);
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if(!is_usr_proc) assert(rp->r_scheduler != NONE);
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/* Start scheduling for the given process. */
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if ((s = sched_start(rp->r_scheduler, rp->r_pub->endpoint,
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RS_PROC_NR, rp->r_priority, rp->r_quantum,
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&rp->r_scheduler)) != OK) {
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return s;
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}
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return s;
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}
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/*===========================================================================*
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* update_sig_mgrs *
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*===========================================================================*/
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PUBLIC int update_sig_mgrs(struct rproc *rp, endpoint_t sig_mgr,
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endpoint_t bak_sig_mgr)
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{
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int r;
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struct rprocpub *rpub;
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rpub = rp->r_pub;
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if(rs_verbose)
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printf("RS: %s updates signal managers: %d%s / %d\n", srv_to_string(rp),
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sig_mgr == SELF ? rpub->endpoint : sig_mgr,
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sig_mgr == SELF ? "(SELF)" : "",
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bak_sig_mgr == NONE ? -1 : bak_sig_mgr);
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/* Synch privilege structure with the kernel. */
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if ((r = sys_getpriv(&rp->r_priv, rpub->endpoint)) != OK) {
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printf("unable to synch privilege structure: %d", r);
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return r;
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}
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/* Set signal managers. */
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rp->r_priv.s_sig_mgr = sig_mgr;
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rp->r_priv.s_bak_sig_mgr = bak_sig_mgr;
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/* Update privilege structure. */
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r = sys_privctl(rpub->endpoint, SYS_PRIV_UPDATE_SYS, &rp->r_priv);
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if(r != OK) {
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printf("unable to update privilege structure: %d", r);
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return r;
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}
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return OK;
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}
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