1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org> 13 * Copyright (c) 2013, 2014 The FreeBSD Foundation 14 * 15 * Portions of this software were developed by Konstantin Belousov 16 * under sponsorship from the FreeBSD Foundation. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions 20 * are met: 21 * 1. Redistributions of source code must retain the above copyright 22 * notice, this list of conditions and the following disclaimer. 23 * 2. Redistributions in binary form must reproduce the above copyright 24 * notice, this list of conditions and the following disclaimer in the 25 * documentation and/or other materials provided with the distribution. 26 * 3. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 */ 42 43 44 // Modified to support the Haiku FAT driver. 45 46 #include "sys/param.h" 47 #include "sys/systm.h" 48 #include "sys/buf.h" 49 #include "sys/mount.h" 50 #include "sys/namei.h" 51 #include "sys/vnode.h" 52 53 54 struct deget_dotdot { 55 u_long cluster; 56 int blkoff; 57 }; 58 59 60 /*! Return in rvp the private node that is specified by alloc_arg, using the function alloc. 61 The FAT driver uses this to call deget when looking up ".." directory entries. 62 */ 63 int 64 vn_vget_ino_gen(struct vnode* vp, vn_get_ino_t alloc, void* alloc_arg, int lkflags, 65 struct vnode** rvp) 66 { 67 struct mount* bsdVolume = vp->v_mount; 68 struct msdosfsmount* fatVolume = (struct msdosfsmount*)bsdVolume->mnt_data; 69 struct deget_dotdot* dotdotLocation = alloc_arg; 70 uint64 inode 71 = (uint64)fatVolume->pm_bpcluster * dotdotLocation->cluster + dotdotLocation->blkoff; 72 73 status_t status = assign_inode(bsdVolume, (ino_t*)&inode); 74 ASSERT_ALWAYS(status == B_OK && node_exists(bsdVolume, inode)); 75 // It's important that this node has already been constructed. 76 // If it hasn't, then deget will construct a private node without publishing it to the VFS. 77 78 return alloc(bsdVolume, alloc_arg, lkflags, rvp); 79 } 80 81 82 /*! The driver uses this to free up memory if a low resource condition occurs after extending a 83 regular file. In FreeBSD, it does this by flushing dirty struct bufs associated with vp. 84 In the Haiku port, we remove all pages from this file's file cache. 85 */ 86 int 87 vn_fsync_buf(struct vnode* vp, int waitfor) 88 { 89 status_t status = B_OK; 90 91 if (waitfor == MNT_WAIT) { 92 vp->v_sync = true; 93 status = file_cache_disable(vp->v_cache); 94 vp->v_sync = false; 95 } else { 96 status = file_cache_disable(vp->v_cache); 97 } 98 99 if (status == B_OK) 100 file_cache_enable(vp->v_cache); 101 102 return B_TO_POSIX_ERROR(status); 103 } 104