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6fd5396fbe
Now that we have our own allocated block cache struct we need to add a shrinker so that it's reclaimed under memory pressure. We keep clean blocks in a simple lru list that the shrinker walks to free the oldest blocks. Signed-off-by: Zach Brown <zab@versity.com> Reviewed-by: Mark Fasheh <mfasheh@versity.com>
39 lines
1.5 KiB
C
39 lines
1.5 KiB
C
#ifndef _SCOUTFS_BLOCK_H_
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#define _SCOUTFS_BLOCK_H_
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struct scoutfs_block;
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#include <linux/fs.h>
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struct scoutfs_block *scoutfs_block_read(struct super_block *sb, u64 blkno);
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struct scoutfs_block *scoutfs_block_read_ref(struct super_block *sb,
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struct scoutfs_block_ref *ref);
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struct scoutfs_block *scoutfs_block_dirty(struct super_block *sb, u64 blkno);
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struct scoutfs_block *scoutfs_block_dirty_alloc(struct super_block *sb);
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struct scoutfs_block *scoutfs_block_dirty_ref(struct super_block *sb,
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struct scoutfs_block_ref *ref);
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int scoutfs_block_has_dirty(struct super_block *sb);
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int scoutfs_block_write_dirty(struct super_block *sb);
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int scoutfs_block_write_sync(struct scoutfs_block *bl);
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void scoutfs_block_set_crc(struct scoutfs_block *bl);
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void scoutfs_block_zero(struct scoutfs_block *bl, size_t off);
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void scoutfs_block_zero_from(struct scoutfs_block *bl, void *ptr);
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void scoutfs_block_set_lock_class(struct scoutfs_block *bl,
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struct lock_class_key *class);
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void scoutfs_block_lock(struct scoutfs_block *bl, bool write, int subclass);
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void scoutfs_block_unlock(struct scoutfs_block *bl, bool write);
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void *scoutfs_block_data(struct scoutfs_block *bl);
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void *scoutfs_block_data_from_contents(const void *ptr);
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void scoutfs_block_forget(struct scoutfs_block *bl);
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void scoutfs_block_put(struct scoutfs_block *bl);
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int scoutfs_block_shrink(struct shrinker *shrink, struct shrink_control *sc);
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void scoutfs_block_destroy(struct super_block *sb);
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#endif
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