1/* $NetBSD: v26.c,v 1.1 2022/01/22 08:09:40 pho Exp $ */ 2 3/* 4 * Copyright (c) 2021 The NetBSD Foundation, Inc. 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 * 3. The name of the author may not be used to endorse or promote 16 * products derived from this software without specific prior written 17 * permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 20 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 25 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h> 33#if !defined(lint) 34__RCSID("$NetBSD: v26.c,v 1.1 2022/01/22 08:09:40 pho Exp $"); 35#endif /* !lint */ 36 37#include <err.h> 38#include <fuse_internal.h> 39#include <stdlib.h> 40#include <string.h> 41 42struct fuse_chan * 43fuse_mount_v26(const char *mountpoint, struct fuse_args *args) { 44 int nominal_fd; 45 46 /* fuse_mount() in FUSE 2.6 returns a fuse_chan instead of fd. We 47 * still need to store the channel in the global list, because 48 * users may call fuse_destroy() before fuse_unmount(). 49 */ 50 nominal_fd = fuse_mount_v25(mountpoint, args); 51 if (nominal_fd == -1) 52 return NULL; 53 54 return fuse_chan_peek(nominal_fd); 55} 56 57static bool 58is_same_channel(struct fuse_chan* chan, void* priv) { 59 return chan == (struct fuse_chan*)priv; 60} 61 62void 63fuse_unmount_v26(const char *mountpoint, struct fuse_chan *ch) { 64 /* Although the API documentation doesn't say so, fuse_unmount() 65 * from FUSE >= 2.6 < 3.0 in fact allows "ch" to be NULL. */ 66 if (ch) 67 if (strcmp(mountpoint, fuse_chan_mountpoint(ch)) != 0) 68 warnx("%s: mountpoint `%s' differs from that was passed to fuse_mount(): %s", 69 __func__, mountpoint, fuse_chan_mountpoint(ch)); 70 71 /* Ask fuse_unmount_v11() to find the channel object that is 72 * already in our hand. We are going to need to know its index in 73 * the global list anyway. */ 74 fuse_unmount_v11(mountpoint); 75} 76 77struct fuse * 78fuse_new_v26(struct fuse_chan *ch, struct fuse_args *args, 79 const void *op, int op_version, 80 void *user_data) { 81 int idx; 82 83 /* Although the fuse_chan object is already in our hand, we need 84 * to know its index in the global list because that's what 85 * fuse_new_v25() wants. */ 86 if (fuse_chan_find(is_same_channel, &idx, ch) == NULL) 87 errx(EXIT_FAILURE, "%s: cannot find the channel index", __func__); 88 89 return fuse_new_v25(idx, args, op, op_version, user_data); 90} 91 92struct fuse * 93fuse_setup_v26(int argc, char *argv[], 94 const void *op, int op_version, 95 char **mountpoint, int *multithreaded, 96 void *user_data) { 97 struct fuse* fuse; 98 struct fuse_cmdline_opts opts; 99 100 fuse = __fuse_setup(argc, argv, op, op_version, user_data, &opts); 101 if (fuse == NULL) 102 return NULL; 103 104 *mountpoint = opts.mountpoint; /* Transfer the ownership of the string. */ 105 *multithreaded = !opts.singlethread; 106 return fuse; 107} 108 109void 110fuse_teardown_v26(struct fuse *fuse, 111 char *mountpoint __attribute__((__unused__))) { 112 __fuse_teardown(fuse); 113} 114