| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 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 | xfs_log_item_t 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 *, xfs_log_item_t *), |
| 59 | xfs_log_item_t *); |
| 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 | |
| 65 | extern kmem_zone_t *xfs_buf_item_zone; |
| 66 | |
| 67 | #endif /* __XFS_BUF_ITEM_H__ */ |