fs/xfs/xfs_buf_item.h

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
   4  * All Rights Reserved.
   5  */
   6 #ifndef __XFS_BUF_ITEM_H__
   7 #define __XFS_BUF_ITEM_H__
   8
   9 /* kernel only definitions */
  10
  11 struct xfs_buf;
  12 struct xfs_mount;
  13
  14 /* buf log item flags */
  15 #define XFS_BLI_HOLD            (1u << 0)
  16 #define XFS_BLI_DIRTY           (1u << 1)
  17 #define XFS_BLI_STALE           (1u << 2)
  18 #define XFS_BLI_LOGGED          (1u << 3)
  19 #define XFS_BLI_INODE_ALLOC_BUF (1u << 4)
  20 #define XFS_BLI_STALE_INODE     (1u << 5)
  21 #define XFS_BLI_INODE_BUF       (1u << 6)
  22 #define XFS_BLI_ORDERED         (1u << 7)
  23
  24 #define XFS_BLI_FLAGS \
  25         { XFS_BLI_HOLD,         "HOLD" }, \
  26         { XFS_BLI_DIRTY,        "DIRTY" }, \
  27         { XFS_BLI_STALE,        "STALE" }, \
  28         { XFS_BLI_LOGGED,       "LOGGED" }, \
  29         { XFS_BLI_INODE_ALLOC_BUF, "INODE_ALLOC" }, \
  30         { XFS_BLI_STALE_INODE,  "STALE_INODE" }, \
  31         { XFS_BLI_INODE_BUF,    "INODE_BUF" }, \
  32         { XFS_BLI_ORDERED,      "ORDERED" }
  33
  34 /*
  35  * This is the in core log item structure used to track information
  36  * needed to log buffers.  It tracks how many times the lock has been
  37  * locked, and which 128 byte chunks of the buffer are dirty.
  38  */
  39 struct xfs_buf_log_item {
  40         struct xfs_log_item     bli_item;       /* common item structure */
  41         struct xfs_buf          *bli_buf;       /* real buffer pointer */
  42         unsigned int            bli_flags;      /* misc flags */
  43         unsigned int            bli_recur;      /* lock recursion count */
  44         atomic_t                bli_refcount;   /* cnt of tp refs */
  45         int                     bli_format_count;       /* count of headers */
  46         struct xfs_buf_log_format *bli_formats; /* array of in-log header ptrs */
  47         struct xfs_buf_log_format __bli_format; /* embedded in-log header */
  48 };
  49
  50 int     xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *);
  51 void    xfs_buf_item_done(struct xfs_buf *bp);
  52 void    xfs_buf_item_relse(struct xfs_buf *);
  53 bool    xfs_buf_item_put(struct xfs_buf_log_item *);
  54 void    xfs_buf_item_log(struct xfs_buf_log_item *, uint, uint);
  55 bool    xfs_buf_item_dirty_format(struct xfs_buf_log_item *);
  56 void    xfs_buf_inode_iodone(struct xfs_buf *);
  57 void    xfs_buf_inode_io_fail(struct xfs_buf *bp);
  58 #ifdef CONFIG_XFS_QUOTA
  59 void    xfs_buf_dquot_iodone(struct xfs_buf *);
  60 void    xfs_buf_dquot_io_fail(struct xfs_buf *bp);
  61 #else
  62 static inline void xfs_buf_dquot_iodone(struct xfs_buf *bp)
  63 {
  64 }
  65 static inline void xfs_buf_dquot_io_fail(struct xfs_buf *bp)
  66 {
  67 }
  68 #endif /* CONFIG_XFS_QUOTA */
  69 void    xfs_buf_iodone(struct xfs_buf *);
  70 bool    xfs_buf_log_check_iovec(struct xfs_log_iovec *iovec);
  71
  72 extern struct kmem_cache        *xfs_buf_item_cache;
  73
  74 #endif  /* __XFS_BUF_ITEM_H__ */