servers/rs/const.h

   1 /* Global constants used in RS.
   2  */
   3 #ifndef RS_CONST_H
   4 #define RS_CONST_H
   5
   6 /* Space reserved for program and arguments. */
   7 #define MAX_COMMAND_LEN     512         /* maximum argument string length */
   8 #define MAX_SCRIPT_LEN      256         /* maximum restart script name length */
   9 #define MAX_NR_ARGS           4         /* maximum number of arguments */
  10
  11 #define MAX_IPC_LIST        256         /* Max size of list for IPC target
  12                                          * process names
  13                                          */
  14
  15 /* Flag values. */
  16 #define RS_IN_USE       0x001    /* set when process slot is in use */
  17 #define RS_EXITING      0x004    /* set when exit is expected */
  18 #define RS_REFRESHING   0x008    /* set when refresh must be done */
  19 #define RS_NOPINGREPLY  0x010    /* service failed to reply to a ping request */
  20 #define RS_KILLED       0x020    /* service is killed */
  21 #define RS_CRASHED      0x040    /* service crashed */
  22 #define RS_LATEREPLY    0x080    /* no reply sent to RS_DOWN caller yet */
  23 #define RS_SIGNALED     0x100    /* service crashed */
  24 #define RS_INITIALIZING 0x200    /* set when init is in progress */
  25 #define RS_UPDATING     0x400    /* set when update is in progress */
  26
  27 /* Sys flag values. */
  28 #define SF_CORE_SRV     0x001    /* set for core system services
  29                                   * XXX FIXME: This should trigger a system
  30                                   * panic when a CORE_SRV service cannot
  31                                   * be restarted. We need better error-handling
  32                                   * in RS to change this.
  33                                   */
  34 #define SF_SYNCH_BOOT   0X002    /* set when process needs synch boot init */
  35 #define SF_NEED_COPY    0x004    /* set when process needs copy to restart */
  36 #define SF_USE_COPY     0x008    /* set when process has a copy in memory */
  37
  38 /* Constants determining RS period and binary exponential backoff. */
  39 #define RS_INIT_T       600                     /* allow T ticks for init */
  40 #define RS_DELTA_T       60                     /* check every T ticks */
  41 #define BACKOFF_BITS    (sizeof(long)*8)        /* bits in backoff field */
  42 #define MAX_BACKOFF      30                     /* max backoff in RS_DELTA_T */
  43
  44 /* Magic process table addresses. */
  45 #define BEG_RPROC_ADDR  (&rproc[0])
  46 #define END_RPROC_ADDR  (&rproc[NR_SYS_PROCS])
  47 #define NIL_RPROC ((struct mproc *) 0)
  48
  49 /* Constants for live update. */
  50 #define RS_DEFAULT_PREPARE_MAXTIME 2*RS_DELTA_T   /* default prepare max time */
  51 #define RS_MAX_PREPARE_MAXTIME     20*RS_DELTA_T  /* max prepare max time */
  52
  53
  54 /* Definitions for boot info tables. */
  55 #define NULL_BOOT_NR    NR_BOOT_PROCS        /* marks a null boot entry */
  56 #define DEFAULT_BOOT_NR NR_BOOT_PROCS        /* marks the default boot entry */
  57 #define SYS_ALL_C       (-1)                 /* specifies all calls */
  58 #define SYS_NULL_C      (-2)                 /* marks a null call entry */
  59
  60 /* Define privilege flags for the various process types. */
  61 #define SRV_F  (SYS_PROC | PREEMPTIBLE)            /* system services */
  62 #define DSRV_F (SRV_F | DYN_PRIV_ID | CHECK_IO_PORT | CHECK_IRQ)
  63                                                    /* dynamic system services */
  64 #define VM_F   (SYS_PROC)                          /* vm  */
  65 #define RUSR_F (BILLABLE | PREEMPTIBLE)            /* root user proc */
  66
  67 /* Define system call traps for the various process types. These call masks
  68  * determine what system call traps a process is allowed to make.
  69  */
  70 #define SRV_T   (~0)                               /* system services */
  71 #define DSRV_T  SRV_T                              /* dynamic system services */
  72 #define RUSR_T  (1 << SENDREC)                     /* root user proc */
  73
  74 /* Send masks determine to whom processes can send messages or notifications. */
  75 #define SRV_M   (~0)                               /* system services */
  76 #define RUSR_M \
  77     ( spi_to(PM_PROC_NR) | spi_to(FS_PROC_NR) | spi_to(RS_PROC_NR) \
  78     | spi_to(VM_PROC_NR) )                         /* root user proc */
  79
  80 /* Define sys flags for the various process types. */
  81 #define SRV_SF   (SF_CORE_SRV | SF_NEED_COPY)  /* system services */
  82 #define SRVC_SF  (SRV_SF | SF_USE_COPY)        /* system services with a copy */
  83 #define DSRV_SF  (0)                           /* dynamic system services */
  84 #define VM_SF    (SRV_SF | SF_SYNCH_BOOT)      /* vm */
  85
  86 #endif /* RS_CONST_H */
  87