minix/servers/vfs/fproc.h

   1 #ifndef __VFS_FPROC_H__
   2 #define __VFS_FPROC_H__
   3
   4 #include "threads.h"
   5
   6 #include <sys/select.h>
   7 #include <minix/safecopies.h>
   8
   9 /* This is the per-process information.  A slot is reserved for each potential
  10  * process. Thus NR_PROCS must be the same as in the kernel. It is not
  11  * possible or even necessary to tell when a slot is free here.
  12  */
  13 #define LOCK_DEBUG 0
  14 EXTERN struct fproc {
  15   unsigned fp_flags;
  16
  17   pid_t fp_pid;                 /* process id */
  18   endpoint_t fp_endpoint;       /* kernel endpoint number of this process */
  19
  20   struct vnode *fp_wd;          /* working directory; NULL during reboot */
  21   struct vnode *fp_rd;          /* root directory; NULL during reboot */
  22
  23   struct filp *fp_filp[OPEN_MAX];/* the file descriptor table (free if NULL) */
  24   fd_set fp_cloexec_set;        /* bit map for POSIX Table 6-2 FD_CLOEXEC */
  25
  26   dev_t fp_tty;                 /* major/minor of controlling tty */
  27
  28   int fp_blocked_on;            /* what is it blocked on */
  29   int fp_block_callnr;          /* blocked call if rd/wr can't finish */
  30   int  fp_cum_io_partial;       /* partial byte count if rd/wr can't finish */
  31   endpoint_t fp_task;           /* which task is proc suspended on */
  32   cp_grant_id_t fp_grant;       /* revoke this grant on unsuspend if > -1 */
  33
  34   uid_t fp_realuid;             /* real user id */
  35   uid_t fp_effuid;              /* effective user id */
  36   gid_t fp_realgid;             /* real group id */
  37   gid_t fp_effgid;              /* effective group id */
  38   int fp_ngroups;               /* number of supplemental groups */
  39   gid_t fp_sgroups[NGROUPS_MAX];/* supplemental groups */
  40   mode_t fp_umask;              /* mask set by umask system call */
  41
  42   mutex_t fp_lock;              /* mutex to lock fproc object */
  43   struct worker_thread *fp_worker;/* active worker thread, or NULL */
  44   void (*fp_func)();            /* handler function for pending work */
  45   message fp_msg;               /* pending or active message from process */
  46   message fp_pm_msg;            /* pending/active postponed PM request */
  47
  48   char fp_name[PROC_NAME_LEN];  /* Last exec() */
  49 #if LOCK_DEBUG
  50   int fp_vp_rdlocks;            /* number of read-only locks on vnodes */
  51   int fp_vmnt_rdlocks;          /* number of read-only locks on vmnts */
  52 #endif
  53
  54   vir_bytes text_size;          /* text segment size of current process */
  55   vir_bytes data_size;          /* data segment size of current process */
  56 } fproc[NR_PROCS];
  57
  58 /* fp_flags */
  59 #define FP_NOFLAGS       0000
  60 #define FP_SRV_PROC      0001   /* Set if process is a service */
  61 #define FP_REVIVED       0002   /* Indicates process is being revived */
  62 #define FP_SESLDR        0004   /* Set if process is session leader */
  63 #define FP_PENDING       0010   /* Set if process has pending work */
  64 #define FP_EXITING       0020   /* Set if process is exiting */
  65 #define FP_PM_WORK       0040   /* Set if process has a postponed PM request */
  66
  67 /* Field values. */
  68 #define NOT_REVIVING       0xC0FFEEE    /* process is not being revived */
  69 #define REVIVING           0xDEEAD      /* process is being revived from suspension */
  70 #define PID_FREE           0    /* process slot free */
  71
  72 #endif /* __VFS_FPROC_H__ */