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https://github.com/versity/scoutfs.git
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44ac668afa
Add two quick functions which perform IO on small fixed size 4K blocks to or from the caller's buffer with privately allocated pages and bios. Callers have no interaction with each other. This matches the behaviour expected by callers of scoutfs_read_super and _write_super. Signed-off-by: Zach Brown <zab@versity.com>
65 lines
2.4 KiB
C
65 lines
2.4 KiB
C
#ifndef _SCOUTFS_BLOCK_H_
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#define _SCOUTFS_BLOCK_H_
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struct scoutfs_block_writer {
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spinlock_t lock;
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struct list_head dirty_list;
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u64 nr_dirty_blocks;
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};
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struct scoutfs_block {
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u64 blkno;
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void *data;
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};
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__le32 scoutfs_block_calc_crc(struct scoutfs_block_header *hdr);
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bool scoutfs_block_valid_crc(struct scoutfs_block_header *hdr);
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bool scoutfs_block_valid_ref(struct super_block *sb,
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struct scoutfs_block_header *hdr,
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__le64 seq, __le64 blkno);
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bool scoutfs_block_tas_visited(struct super_block *sb,
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struct scoutfs_block *bl);
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void scoutfs_block_clear_visited(struct super_block *sb,
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struct scoutfs_block *bl);
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struct scoutfs_block *scoutfs_block_create(struct super_block *sb, u64 blkno);
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struct scoutfs_block *scoutfs_block_read(struct super_block *sb, u64 blkno);
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void scoutfs_block_invalidate(struct super_block *sb, struct scoutfs_block *bl);
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bool scoutfs_block_consistent_ref(struct super_block *sb,
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struct scoutfs_block *bl,
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__le64 seq, __le64 blkno, u32 magic);
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void scoutfs_block_put(struct super_block *sb, struct scoutfs_block *bl);
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void scoutfs_block_writer_init(struct super_block *sb,
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struct scoutfs_block_writer *wri);
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void scoutfs_block_writer_mark_dirty(struct super_block *sb,
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struct scoutfs_block_writer *wri,
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struct scoutfs_block *bl);
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bool scoutfs_block_writer_is_dirty(struct super_block *sb,
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struct scoutfs_block *bl);
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int scoutfs_block_writer_write(struct super_block *sb,
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struct scoutfs_block_writer *wri);
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void scoutfs_block_writer_forget_all(struct super_block *sb,
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struct scoutfs_block_writer *wri);
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void scoutfs_block_writer_forget(struct super_block *sb,
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struct scoutfs_block_writer *wri,
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struct scoutfs_block *bl);
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void scoutfs_block_move(struct super_block *sb,
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struct scoutfs_block_writer *wri,
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struct scoutfs_block *bl, u64 blkno);
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bool scoutfs_block_writer_has_dirty(struct super_block *sb,
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struct scoutfs_block_writer *wri);
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u64 scoutfs_block_writer_dirty_bytes(struct super_block *sb,
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struct scoutfs_block_writer *wri);
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int scoutfs_block_read_sm(struct super_block *sb, u64 blkno,
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struct scoutfs_block_header *hdr, size_t len,
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__le32 *blk_crc);
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int scoutfs_block_write_sm(struct super_block *sb, u64 blkno,
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struct scoutfs_block_header *hdr, size_t len);
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int scoutfs_block_setup(struct super_block *sb);
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void scoutfs_block_destroy(struct super_block *sb);
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#endif
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