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libminixfs, mfs, ext2: may re-evaluate cache size

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libminixfs may now be informed of changes to the block usage on the
filesystem. if the net change becomes big enough, libminixfs may
resize the cache based on the new usage.

	. update the 2 FSes to provide this information to libminixfs

Change-Id: I158815a11da801fd5572a8de89c9e6c039b82650
This commit is contained in:
Ben Gras
2013-04-26 13:57:08 +00:00
parent 988c7e39c0
commit f0cc010614
6 changed files with 87 additions and 20 deletions
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include/minix/libminixfs.h
+2
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@@ -56,6 +56,8 @@ void lmfs_put_block(struct buf *bp, int block_type);
void lmfs_rw_scattered(dev_t, struct buf **, int, int);
void lmfs_setquiet(int q);
int lmfs_do_bpeek(message *);
void lmfs_cache_reevaluate(dev_t dev);
void lmfs_blockschange(dev_t dev, int delta);
/* calls that libminixfs does into fs */
void fs_blockstats(u32_t *blocks, u32_t *free, u32_t *used);