minix/servers/vfs/type.h

   1 #ifndef __VFS_TYPE_H__
   2 #define __VFS_TYPE_H__
   3
   4 /* VFS<->FS communication */
   5
   6 typedef struct {
   7   int c_max_reqs;       /* Max requests an FS can handle simultaneously */
   8   int c_cur_reqs;       /* Number of requests the FS is currently handling */
   9   struct worker_thread *c_req_queue;/* Queue of procs waiting to send a message */
  10 } comm_t;
  11
  12 /*
  13  * Cached statvfs fields.  We are not using struct statvfs itself because that
  14  * would add over 2K of unused memory per mount table entry.
  15  */
  16 struct statvfs_cache {
  17   unsigned long f_flag;         /* copy of mount exported flags */
  18   unsigned long f_bsize;        /* file system block size */
  19   unsigned long f_frsize;       /* fundamental file system block size */
  20   unsigned long f_iosize;       /* optimal file system block size */
  21
  22   fsblkcnt_t    f_blocks;       /* number of blocks in file system, */
  23   fsblkcnt_t    f_bfree;        /* free blocks avail in file system */
  24   fsblkcnt_t    f_bavail;       /* free blocks avail to non-root */
  25   fsblkcnt_t    f_bresvd;       /* blocks reserved for root */
  26
  27   fsfilcnt_t    f_files;        /* total file nodes in file system */
  28   fsfilcnt_t    f_ffree;        /* free file nodes in file system */
  29   fsfilcnt_t    f_favail;       /* free file nodes avail to non-root */
  30   fsfilcnt_t    f_fresvd;       /* file nodes reserved for root */
  31
  32   uint64_t      f_syncreads;    /* count of sync reads since mount */
  33   uint64_t      f_syncwrites;   /* count of sync writes since mount */
  34
  35   uint64_t      f_asyncreads;   /* count of async reads since mount */
  36   uint64_t      f_asyncwrites;  /* count of async writes since mount */
  37
  38   unsigned long f_namemax;      /* maximum filename length */
  39 };
  40
  41 #endif