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 /* buf log item flags */ 12 #define XFS_BLI_HOLD 0x01 13 #define XFS_BLI_DIRTY 0x02 14 #define XFS_BLI_STALE 0x04 15 #define XFS_BLI_LOGGED 0x08 16 #define XFS_BLI_INODE_ALLOC_BUF 0x10 17 #define XFS_BLI_STALE_INODE 0x20 18 #define XFS_BLI_INODE_BUF 0x40 19 #define XFS_BLI_ORDERED 0x80 20 21 #define XFS_BLI_FLAGS \ 22 { XFS_BLI_HOLD, "HOLD" }, \ 23 { XFS_BLI_DIRTY, "DIRTY" }, \ 24 { XFS_BLI_STALE, "STALE" }, \ 25 { XFS_BLI_LOGGED, "LOGGED" }, \ 26 { XFS_BLI_INODE_ALLOC_BUF, "INODE_ALLOC" }, \ 27 { XFS_BLI_STALE_INODE, "STALE_INODE" }, \ 28 { XFS_BLI_INODE_BUF, "INODE_BUF" }, \ 29 { XFS_BLI_ORDERED, "ORDERED" } 30 31 32 struct xfs_buf; 33 struct xfs_mount; 34 struct xfs_buf_log_item; 35 36 /* 37 * This is the in core log item structure used to track information 38 * needed to log buffers. It tracks how many times the lock has been 39 * locked, and which 128 byte chunks of the buffer are dirty. 40 */ 41 struct xfs_buf_log_item { 42 struct xfs_log_item bli_item; /* common item structure */ 43 struct xfs_buf *bli_buf; /* real buffer pointer */ 44 unsigned int bli_flags; /* misc flags */ 45 unsigned int bli_recur; /* lock recursion count */ 46 atomic_t bli_refcount; /* cnt of tp refs */ 47 int bli_format_count; /* count of headers */ 48 struct xfs_buf_log_format *bli_formats; /* array of in-log header ptrs */ 49 struct xfs_buf_log_format __bli_format; /* embedded in-log header */ 50 }; 51 52 int xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *); 53 void xfs_buf_item_relse(struct xfs_buf *); 54 bool xfs_buf_item_put(struct xfs_buf_log_item *); 55 void xfs_buf_item_log(struct xfs_buf_log_item *, uint, uint); 56 bool xfs_buf_item_dirty_format(struct xfs_buf_log_item *); 57 void xfs_buf_attach_iodone(struct xfs_buf *, 58 void(*)(struct xfs_buf *, struct xfs_log_item *), 59 struct xfs_log_item *); 60 void xfs_buf_iodone_callbacks(struct xfs_buf *); 61 void xfs_buf_iodone(struct xfs_buf *, struct xfs_log_item *); 62 bool xfs_buf_resubmit_failed_buffers(struct xfs_buf *, 63 struct list_head *); 64 bool xfs_buf_log_check_iovec(struct xfs_log_iovec *iovec); 65 66 extern kmem_zone_t *xfs_buf_item_zone; 67 68 #endif /* __XFS_BUF_ITEM_H__ */ 69