fs/xfs/xfs_inode_item.h

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2000,2005 Silicon Graphics, Inc.
   4  * All Rights Reserved.
   5  */
   6 #ifndef __XFS_INODE_ITEM_H__
   7 #define __XFS_INODE_ITEM_H__
   8
   9 /* kernel only definitions */
  10
  11 struct xfs_buf;
  12 struct xfs_bmbt_rec;
  13 struct xfs_inode;
  14 struct xfs_mount;
  15
  16 struct xfs_inode_log_item {
  17         struct xfs_log_item     ili_item;          /* common portion */
  18         struct xfs_inode        *ili_inode;        /* inode ptr */
  19         unsigned short          ili_lock_flags;    /* inode lock flags */
  20         /*
  21          * The ili_lock protects the interactions between the dirty state and
  22          * the flush state of the inode log item. This allows us to do atomic
  23          * modifications of multiple state fields without having to hold a
  24          * specific inode lock to serialise them.
  25          *
  26          * We need atomic changes between inode dirtying, inode flushing and
  27          * inode completion, but these all hold different combinations of
  28          * ILOCK and IFLUSHING and hence we need some other method of
  29          * serialising updates to the flush state.
  30          */
  31         spinlock_t              ili_lock;          /* flush state lock */
  32         unsigned int            ili_last_fields;   /* fields when flushed */
  33         unsigned int            ili_fields;        /* fields to be logged */
  34         unsigned int            ili_fsync_fields;  /* logged since last fsync */
  35         xfs_lsn_t               ili_flush_lsn;     /* lsn at last flush */
  36         xfs_lsn_t               ili_last_lsn;      /* lsn at last transaction */
  37 };
  38
  39 static inline int xfs_inode_clean(struct xfs_inode *ip)
  40 {
  41         return !ip->i_itemp || !(ip->i_itemp->ili_fields & XFS_ILOG_ALL);
  42 }
  43
  44 extern void xfs_inode_item_init(struct xfs_inode *, struct xfs_mount *);
  45 extern void xfs_inode_item_destroy(struct xfs_inode *);
  46 extern void xfs_iflush_abort(struct xfs_inode *);
  47 extern int xfs_inode_item_format_convert(xfs_log_iovec_t *,
  48                                          struct xfs_inode_log_format *);
  49
  50 extern struct kmem_zone *xfs_ili_zone;
  51
  52 #endif  /* __XFS_INODE_ITEM_H__ */