minix/fs/ext2/misc.c

   1 /* Created (MFS based):
   2  *   February 2010 (Evgeniy Ivanov)
   3  */
   4
   5 #include "fs.h"
   6 #include "inode.h"
   7 #include "super.h"
   8 #include <assert.h>
   9
  10 /*===========================================================================*
  11  *                              fs_sync                                      *
  12  *===========================================================================*/
  13 void fs_sync(void)
  14 {
  15 /* Perform the sync() system call.  Flush all the tables.
  16  * The order in which the various tables are flushed is critical.  The
  17  * blocks must be flushed last, since rw_inode() leaves its results in
  18  * the block cache.
  19  */
  20   struct inode *rip;
  21
  22   if (superblock->s_rd_only)
  23         return; /* nothing to sync */
  24
  25   /* Write all the dirty inodes to the disk. */
  26   for(rip = &inode[0]; rip < &inode[NR_INODES]; rip++)
  27         if(rip->i_count > 0 && rip->i_dirt == IN_DIRTY) rw_inode(rip, WRITING);
  28
  29   lmfs_flushall();
  30
  31   if (superblock->s_dev != NO_DEV) {
  32         superblock->s_wtime = clock_time(NULL);
  33         write_super(superblock);
  34   }
  35 }