1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2004 Poul-Henning Kamp 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 #ifndef FAT_BUFOBJ_H 29 #define FAT_BUFOBJ_H 30 31 32 // Modified to support the Haiku FAT driver. 33 34 #include <sys/queue.h> 35 36 #include "sys/_rwlock.h" 37 38 39 SLIST_HEAD(buf_list, buf); 40 41 // For the device vnode, v_bufobj holds lists of struct bufs that are available for use 42 // by the functions defined in vfs_bio.c. For all other nodes, v_bufobj is not used. 43 struct bufobj { 44 struct rwlock bo_lock; 45 u_int bo_flag; 46 47 // Members added for Haiku port 48 struct buf_list bo_clusterbufs; 49 // an SLIST of buffers with b_bufsize equal to cluster size 50 uint32 bo_clusters; 51 // count of bufs in bo_clusterbufs 52 struct buf_list bo_fatbufs; 53 // SLIST of buffers of the size used to read the FAT. Currently, FAT16 and FAT32 volumes 54 // read the FAT in 512-byte blocks, and this is only useful for FAT12, which reads it in 55 // 1536-byte blocks. 56 uint32 bo_fatblocks; 57 struct buf_list bo_emptybufs; 58 // SLIST of buffers with no space allocated for b_data (b_data must be set to point to a 59 // block in the block cache). 60 uint32 bo_empties; 61 }; 62 63 #define BO_LOCK(bo) rw_lock_write_lock(BO_LOCKPTR(bo)) 64 #define BO_UNLOCK(bo) rw_lock_write_unlock(BO_LOCKPTR(bo)) 65 66 67 #endif // FAT_BUFOBJ_H 68