1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or https://opensource.org/licenses/CDDL-1.0. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2011, Fajar A. Nugraha. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <ctype.h> 27 #include <errno.h> 28 #include <fcntl.h> 29 #include <stdio.h> 30 #include <string.h> 31 #include <unistd.h> 32 #include <sys/fs/zfs.h> 33 #include <sys/ioctl.h> 34 #include <sys/stat.h> 35 36 #if defined(ZFS_ASAN_ENABLED) 37 /* 38 * zvol_id is invoked by udev with the help of ptrace() 39 * making sanitized binary with leak detection croak 40 * because of tracing mechanisms collision 41 */ 42 extern const char *__asan_default_options(void); 43 44 const char *__asan_default_options(void) { 45 return ("abort_on_error=true:halt_on_error=true:" 46 "allocator_may_return_null=true:disable_coredump=false:" 47 "detect_stack_use_after_return=true:detect_leaks=false"); 48 } 49 #endif 50 51 int 52 main(int argc, const char *const *argv) 53 { 54 if (argc != 2 || strncmp(argv[1], "/dev/zd", 7) != 0) { 55 fprintf(stderr, "usage: %s /dev/zdX\n", argv[0]); 56 return (1); 57 } 58 const char *dev_name = argv[1]; 59 size_t i, len; 60 61 int fd; 62 struct stat sb; 63 if ((fd = open(dev_name, O_RDONLY|O_CLOEXEC)) == -1 || 64 fstat(fd, &sb) != 0) { 65 fprintf(stderr, "%s: %s\n", dev_name, strerror(errno)); 66 return (1); 67 } 68 69 char zvol_name[MAXNAMELEN + strlen("-part") + 10]; 70 if (ioctl(fd, BLKZNAME, zvol_name) == -1) { 71 fprintf(stderr, "%s: BLKZNAME: %s\n", 72 dev_name, strerror(errno)); 73 return (1); 74 } 75 76 const char *dev_part = strrchr(dev_name, 'p'); 77 len = strlen(zvol_name); 78 if (dev_part != NULL) { 79 sprintf(zvol_name + len, "-part%s", dev_part + 1); 80 len = strlen(zvol_name); 81 } 82 83 for (i = 0; i < len; ++i) 84 if (isblank(zvol_name[i])) 85 zvol_name[i] = '+'; 86 87 puts(zvol_name); 88 89 return (0); 90 } 91