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intermezzo_psdev.h
Package: linux-2.4.20.tar.gz　[view]
Upload User: jlfgdled
Upload Date: 2013-04-10
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Code Size: 2k
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Linux-Unix program

Development Platform:

Unix_Linux

intermezzo_psdev.h：Code Content
  1. /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
  2.  * vim:expandtab:shiftwidth=8:tabstop=8:
  3.  */
  5. #ifndef __PRESTO_PSDEV_H
  6. #define __PRESTO_PSDEV_H
  8. #define MAX_CHANNEL 16
  9. #define PROCNAME_SIZE 32
  10. #include <linux/locks.h>
  11. #include <linux/smp_lock.h>
  12. #include <linux/version.h>
  14. /* represents state of an instance reached with /dev/intermezzo */
  15. /* communication pending & processing queues */
  16. struct upc_channel {
  17.         unsigned int         uc_seq;
  18.         wait_queue_head_t    uc_waitq;    /* Lento wait queue */
  19.         struct list_head     uc_pending;
  20.         struct list_head     uc_processing;
  21.         spinlock_t            uc_lock;
  22.         int                  uc_pid;      /* Lento's pid */
  23.         int                  uc_hard;     /* allows signals during upcalls */
  24.         int                  uc_no_filter;
  25.         int                  uc_no_journal;
  26.         int                  uc_no_upcall;
  27.         int                  uc_timeout;  /* . sec: signals will dequeue upc */
  28.         long                 uc_errorval; /* for testing I/O failures */
  29.         struct list_head     uc_cache_list;
  30.         int                  uc_minor;
  31. };
  33. #define ISLENTO(minor) (current->pid == izo_channels[minor].uc_pid 
  34.                 || current->p_pptr->pid == izo_channels[minor].uc_pid 
  35.                 || current->p_pptr->p_pptr->pid == izo_channels[minor].uc_pid)
  37. extern struct upc_channel izo_channels[MAX_CHANNEL];
  39. /* message types between presto filesystem in kernel */
  40. #define REQ_READ   1
  41. #define REQ_WRITE  2
  42. #define REQ_ASYNC  4
  43. #define REQ_DEAD   8
  45. struct upc_req {
  46.         struct list_head   rq_chain;
  47.         caddr_t            rq_data;
  48.         int                rq_flags;
  49.         int                rq_bufsize;
  50.         int                rq_rep_size;
  51.         int                rq_opcode;  /* copied from data to save lookup */
  52.         int                rq_unique;
  53.         wait_queue_head_t  rq_sleep;   /* process' wait queue */
  54.         unsigned long      rq_posttime;
  55. };
  57. #endif