linux-imx

/* SPDX-License-Identifier: GPL-2.0 */

​

#ifndef BTRFS_EXTENT_IO_H

#define BTRFS_EXTENT_IO_H

​

#include <linux/rbtree.h>

#include <linux/refcount.h>

#include "ulist.h"

​

/* bits for the extent state */

#define EXTENT_DIRTY        (1U << 0)

#define EXTENT_WRITEBACK    (1U << 1)

#define EXTENT_UPTODATE     (1U << 2)

#define EXTENT_LOCKED       (1U << 3)

#define EXTENT_NEW      (1U << 4)

#define EXTENT_DELALLOC     (1U << 5)

#define EXTENT_DEFRAG       (1U << 6)

#define EXTENT_BOUNDARY     (1U << 9)

#define EXTENT_NODATASUM    (1U << 10)

#define EXTENT_CLEAR_META_RESV  (1U << 11)

#define EXTENT_NEED_WAIT    (1U << 12)

#define EXTENT_DAMAGED      (1U << 13)

#define EXTENT_NORESERVE    (1U << 14)

#define EXTENT_QGROUP_RESERVED  (1U << 15)

#define EXTENT_CLEAR_DATA_RESV  (1U << 16)

#define EXTENT_DELALLOC_NEW (1U << 17)

#define EXTENT_IOBITS       (EXTENT_LOCKED | EXTENT_WRITEBACK)

#define EXTENT_DO_ACCOUNTING    (EXTENT_CLEAR_META_RESV | \

                 EXTENT_CLEAR_DATA_RESV)

#define EXTENT_CTLBITS      (EXTENT_DO_ACCOUNTING)

​

/*

 * flags for bio submission. The high bits indicate the compression

 * type for this bio

 */

#define EXTENT_BIO_COMPRESSED 1

#define EXTENT_BIO_FLAG_SHIFT 16

​

enum {

    EXTENT_BUFFER_UPTODATE,

    EXTENT_BUFFER_DIRTY,

    EXTENT_BUFFER_CORRUPT,

    /* this got triggered by readahead */

    EXTENT_BUFFER_READAHEAD,

    EXTENT_BUFFER_TREE_REF,

    EXTENT_BUFFER_STALE,

    EXTENT_BUFFER_WRITEBACK,

    /* read IO error */

    EXTENT_BUFFER_READ_ERR,

    EXTENT_BUFFER_UNMAPPED,

    EXTENT_BUFFER_IN_TREE,

    /* write IO error */

    EXTENT_BUFFER_WRITE_ERR,

};

​

/* these are flags for __process_pages_contig */

#define PAGE_UNLOCK     (1 << 0)

#define PAGE_CLEAR_DIRTY    (1 << 1)

#define PAGE_SET_WRITEBACK  (1 << 2)

#define PAGE_END_WRITEBACK  (1 << 3)

#define PAGE_SET_PRIVATE2   (1 << 4)

#define PAGE_SET_ERROR      (1 << 5)

#define PAGE_LOCK       (1 << 6)