source: trunk/minix/servers/rs/manager.h@ 10

Last change on this file since 10 was 9, checked in by Mattia Monga, 13 years ago

Minix 3.1.2a

File size: 2.1 KB
Line 
1/* This table has one slot per system process. It contains information for
2 * servers and driver needed by the reincarnation server to keep track of
3 * each process' status.
4 */
5
6/* Space reserved for program and arguments. */
7#define MAX_COMMAND_LEN 512 /* maximum argument string length */
8#define MAX_NR_ARGS 4 /* maximum number of arguments */
9#define MAX_RESCUE_DIR_LEN 64 /* maximum rescue dir length */
10
11/* Definition of the system process table. This table only has entries for
12 * the servers and drivers, and thus is not directly indexed by slot number.
13 */
14extern struct rproc {
15 int r_proc_nr_e; /* process endpoint number */
16 pid_t r_pid; /* process id */
17 dev_t r_dev_nr; /* major device number */
18 int r_dev_style; /* device style */
19
20 int r_restarts; /* number of restarts (initially zero) */
21 long r_backoff; /* number of periods to wait before revive */
22 unsigned r_flags; /* status and policy flags */
23
24 long r_period; /* heartbeat period (or zero) */
25 clock_t r_check_tm; /* timestamp of last check */
26 clock_t r_alive_tm; /* timestamp of last heartbeat */
27 clock_t r_stop_tm; /* timestamp of SIGTERM signal */
28
29 char r_cmd[MAX_COMMAND_LEN]; /* raw command plus arguments */
30 char *r_argv[MAX_NR_ARGS+2]; /* parsed arguments vector */
31 int r_argc; /* number of arguments */
32} rproc[NR_SYS_PROCS];
33
34/* Mapping for fast access to the system process table. */
35extern struct rproc *rproc_ptr[NR_PROCS];
36extern int nr_in_use;
37
38/* Flag values. */
39#define RS_IN_USE 0x001 /* set when process slot is in use */
40#define RS_EXITING 0x002 /* set when exit is expected */
41#define RS_REFRESHING 0x004 /* set when refresh must be done */
42
43/* Constants determining RS period and binary exponential backoff. */
44#define RS_DELTA_T 60 /* check every T ticks */
45#define BACKOFF_BITS (sizeof(long)*8) /* bits in backoff field */
46#define MAX_BACKOFF 30 /* max backoff in RS_DELTA_T */
47
48/* Magic process table addresses. */
49#define BEG_RPROC_ADDR (&rproc[0])
50#define END_RPROC_ADDR (&rproc[NR_SYS_PROCS])
51#define NIL_RPROC ((struct mproc *) 0)
52
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