1 /* 2 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #ifndef __XFS_BUF_ITEM_H__ 19 #define __XFS_BUF_ITEM_H__ 20 21 /* kernel only definitions */ 22 23 /* buf log item flags */ 24 #define XFS_BLI_HOLD 0x01 25 #define XFS_BLI_DIRTY 0x02 26 #define XFS_BLI_STALE 0x04 27 #define XFS_BLI_LOGGED 0x08 28 #define XFS_BLI_INODE_ALLOC_BUF 0x10 29 #define XFS_BLI_STALE_INODE 0x20 30 #define XFS_BLI_INODE_BUF 0x40 31 #define XFS_BLI_ORDERED 0x80 32 33 #define XFS_BLI_FLAGS \ 34 { XFS_BLI_HOLD, "HOLD" }, \ 35 { XFS_BLI_DIRTY, "DIRTY" }, \ 36 { XFS_BLI_STALE, "STALE" }, \ 37 { XFS_BLI_LOGGED, "LOGGED" }, \ 38 { XFS_BLI_INODE_ALLOC_BUF, "INODE_ALLOC" }, \ 39 { XFS_BLI_STALE_INODE, "STALE_INODE" }, \ 40 { XFS_BLI_INODE_BUF, "INODE_BUF" }, \ 41 { XFS_BLI_ORDERED, "ORDERED" } 42 43 44 struct xfs_buf; 45 struct xfs_mount; 46 struct xfs_buf_log_item; 47 48 /* 49 * This is the in core log item structure used to track information 50 * needed to log buffers. It tracks how many times the lock has been 51 * locked, and which 128 byte chunks of the buffer are dirty. 52 */ 53 typedef struct xfs_buf_log_item { 54 xfs_log_item_t bli_item; /* common item structure */ 55 struct xfs_buf *bli_buf; /* real buffer pointer */ 56 unsigned int bli_flags; /* misc flags */ 57 unsigned int bli_recur; /* lock recursion count */ 58 atomic_t bli_refcount; /* cnt of tp refs */ 59 int bli_format_count; /* count of headers */ 60 struct xfs_buf_log_format *bli_formats; /* array of in-log header ptrs */ 61 struct xfs_buf_log_format __bli_format; /* embedded in-log header */ 62 } xfs_buf_log_item_t; 63 64 int xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *); 65 void xfs_buf_item_relse(struct xfs_buf *); 66 void xfs_buf_item_log(xfs_buf_log_item_t *, uint, uint); 67 bool xfs_buf_item_dirty_format(struct xfs_buf_log_item *); 68 void xfs_buf_attach_iodone(struct xfs_buf *, 69 void(*)(struct xfs_buf *, xfs_log_item_t *), 70 xfs_log_item_t *); 71 void xfs_buf_iodone_callbacks(struct xfs_buf *); 72 void xfs_buf_iodone(struct xfs_buf *, struct xfs_log_item *); 73 bool xfs_buf_resubmit_failed_buffers(struct xfs_buf *, 74 struct xfs_log_item *, 75 struct list_head *); 76 77 extern kmem_zone_t *xfs_buf_item_zone; 78 79 #endif /* __XFS_BUF_ITEM_H__ */ 80