4472b590c7
This patch changes the prefetch API so that file systems must now provide a set of block numbers, rather than a set of buffers. The result is a leaner and more well-defined API; linear computation of the range of blocks to prefetch; duplicates no longer interfering with the prefetch process; guaranteed inclusion of the block needed next into the prefetch range; and, limits and policy decisions better established by libminixfs now actually being moved into libminixfs. Change-Id: I7e44daf2d2d164bc5e2f1473ad717f3ff0f0a77f
36 lines
959 B
C
36 lines
959 B
C
/* Created (MFS based):
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* February 2010 (Evgeniy Ivanov)
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*/
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#include "fs.h"
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#include "inode.h"
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#include "super.h"
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#include <assert.h>
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/*===========================================================================*
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* fs_sync *
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*===========================================================================*/
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void fs_sync(void)
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{
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/* Perform the sync() system call. Flush all the tables.
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* The order in which the various tables are flushed is critical. The
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* blocks must be flushed last, since rw_inode() leaves its results in
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* the block cache.
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*/
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struct inode *rip;
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if (superblock->s_rd_only)
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return; /* nothing to sync */
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/* Write all the dirty inodes to the disk. */
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for(rip = &inode[0]; rip < &inode[NR_INODES]; rip++)
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if(rip->i_count > 0 && rip->i_dirt == IN_DIRTY) rw_inode(rip, WRITING);
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lmfs_flushall();
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if (superblock->s_dev != NO_DEV) {
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superblock->s_wtime = clock_time(NULL);
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write_super(superblock);
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}
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}
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