lib/libpuffs/misc.c

   1 /* Created (MFS based):
   2  *   June 2011 (Evgeniy Ivanov)
   3  */
   4
   5 #include "fs.h"
   6 #include <assert.h>
   7 #include <minix/vfsif.h>
   8
   9 #include "puffs.h"
  10 #include "puffs_priv.h"
  11
  12 /*===========================================================================*
  13  *                              fs_sync                                      *
  14  *===========================================================================*/
  15 int fs_sync(void)
  16 {
  17 /* Perform the sync() system call.  Flush all the tables.
  18  * The order in which the various tables are flushed is critical.
  19  */
  20   int r;
  21   PUFFS_MAKECRED(pcr, &global_kcred);
  22
  23   if (is_readonly_fs)
  24         return(OK); /* nothing to sync */
  25
  26   r = global_pu->pu_ops.puffs_fs_sync(global_pu, MNT_WAIT, pcr);
  27   if (r) {
  28         lpuffs_debug("Warning: sync failed!\n");
  29   }
  30
  31   return(OK);           /* sync() can't fail */
  32 }
  33
  34
  35 /*===========================================================================*
  36  *                              fs_flush                                     *
  37  *===========================================================================*/
  38 int fs_flush(void)
  39 {
  40 /* Flush the blocks of a device from the cache after writing any dirty blocks
  41  * to disk.
  42  */
  43 #if 0
  44   dev_t dev = fs_m_in.m_vfs_fs_flush.device;
  45
  46   if(dev == fs_dev) return(EBUSY);
  47
  48   flushall(dev);
  49   invalidate(dev);
  50 #endif
  51
  52   return(OK);
  53 }
  54
  55
  56 /*===========================================================================*
  57  *                              fs_new_driver                                *
  58  *===========================================================================*/
  59 int fs_new_driver(void)
  60 {
  61 /* Do not do anything. */
  62
  63   return(OK);
  64 }