minix/servers/rs/const.h

   1 /* Global constants used in RS.
   2  */
   3 #ifndef RS_CONST_H
   4 #define RS_CONST_H
   5
   6 #define DEBUG_DEFAULT      0
   7 #define PRIV_DEBUG_DEFAULT 0
   8
   9 #ifndef DEBUG
  10 #define DEBUG DEBUG_DEFAULT
  11 #endif
  12
  13 #ifndef PRIV_DEBUG
  14 #define PRIV_DEBUG PRIV_DEBUG_DEFAULT
  15 #endif
  16
  17 /* Space reserved for program and arguments. */
  18 #define MAX_COMMAND_LEN     512         /* maximum argument string length */
  19 #define MAX_SCRIPT_LEN      256         /* maximum restart script name length */
  20 #define MAX_NR_ARGS          10         /* maximum number of arguments */
  21
  22 #define MAX_IPC_LIST        256         /* Max size of list for IPC target
  23                                          * process names
  24                                          */
  25
  26 /* Flag values. */
  27 #define RS_IN_USE       0x001    /* set when process slot is in use */
  28 #define RS_EXITING      0x002    /* set when exit is expected */
  29 #define RS_REFRESHING   0x004    /* set when refresh must be done */
  30 #define RS_NOPINGREPLY  0x008    /* service failed to reply to a ping request */
  31 #define RS_TERMINATED   0x010    /* service has terminated */
  32 #define RS_LATEREPLY    0x020    /* no reply sent to RS_DOWN caller yet */
  33 #define RS_INITIALIZING 0x040    /* set when init is in progress */
  34 #define RS_UPDATING     0x080    /* set when update is in progress */
  35 #define RS_ACTIVE       0x100    /* set for the active instance of a service */
  36 #define RS_REINCARNATE  0x200    /* after exit, restart with a new endpoint */
  37
  38 /* Sys flag values. */
  39 #define SF_CORE_SRV     0x001    /* set for core system services */
  40 #define SF_SYNCH_BOOT   0X002    /* set when process needs synch boot init */
  41 #define SF_NEED_COPY    0x004    /* set when process needs copy to start */
  42 #define SF_USE_COPY     0x008    /* set when process has a copy in memory */
  43 #define SF_NEED_REPL    0x010    /* set when process needs replica to start */
  44 #define SF_USE_REPL     0x020    /* set when process has a replica */
  45 #define SF_NO_BIN_EXP   0x040    /* set when we should ignore binary exp. offset */
  46 #define IMM_SF          \
  47     (SF_NO_BIN_EXP | SF_CORE_SRV | SF_SYNCH_BOOT | SF_NEED_COPY | SF_NEED_REPL) /* immutable */
  48
  49 /* Constants determining RS period and binary exponential backoff. */
  50 #define RS_INIT_T       (system_hz * 10)        /* allow T ticks for init */
  51 #define RS_DELTA_T      (system_hz)             /* check every T ticks */
  52 #define BACKOFF_BITS    (sizeof(long)*8)        /* bits in backoff field */
  53 #define MAX_BACKOFF      30                     /* max backoff in RS_DELTA_T */
  54
  55 /* Magic process table addresses. */
  56 #define BEG_RPROC_ADDR  (&rproc[0])
  57 #define END_RPROC_ADDR  (&rproc[NR_SYS_PROCS])
  58
  59 /* Constants for live update. */
  60 #define RS_DEFAULT_PREPARE_MAXTIME 2*RS_DELTA_T   /* default prepare max time */
  61 #define RS_MAX_PREPARE_MAXTIME     20*RS_DELTA_T  /* max prepare max time */
  62
  63
  64 /* Definitions for boot info tables. */
  65 #define NULL_BOOT_NR    NR_BOOT_PROCS        /* marks a null boot entry */
  66 #define DEFAULT_BOOT_NR NR_BOOT_PROCS        /* marks the default boot entry */
  67
  68 /* Define sys flags for the various process types. */
  69 #define SRV_SF   (SF_CORE_SRV)                 /* system services */
  70 #define SRVR_SF  (SRV_SF | SF_NEED_REPL)       /* services needing a replica */
  71 #define DSRV_SF  (0)                           /* dynamic system services */
  72 #define VM_SF    (SRVR_SF)                      /* vm */
  73
  74 /* Shorthands. */
  75 #define SRV_OR_USR(rp, X, Y) (rp->r_priv.s_flags & SYS_PROC ? X : Y)
  76
  77 /* Reply flags. */
  78 #define RS_DONTREPLY    0
  79 #define RS_REPLY        1
  80
  81 /* Swap flags. */
  82 #define RS_DONTSWAP     0
  83 #define RS_SWAP         1
  84
  85 #endif /* RS_CONST_H */
  86