1 /* 2 * Copyright 2008 Red Hat, Inc. All rights reserved. 3 * Copyright 2008 Ian Kent <[email protected]> 4 * 5 * This file is part of the Linux kernel and is made available under 6 * the terms of the GNU General Public License, version 2, or at your 7 * option, any later version, incorporated herein by reference. 8 */ 9 10 #ifndef _LINUX_AUTO_DEV_IOCTL_H 11 #define _LINUX_AUTO_DEV_IOCTL_H 12 13 #include <linux/auto_fs.h> 14 15 #ifdef __KERNEL__ 16 #include <linux/string.h> 17 #else 18 #include <string.h> 19 #endif /* __KERNEL__ */ 20 21 #define AUTOFS_DEVICE_NAME "autofs" 22 23 #define AUTOFS_DEV_IOCTL_VERSION_MAJOR 1 24 #define AUTOFS_DEV_IOCTL_VERSION_MINOR 0 25 26 #define AUTOFS_DEVID_LEN 16 27 28 #define AUTOFS_DEV_IOCTL_SIZE sizeof(struct autofs_dev_ioctl) 29 30 /* 31 * An ioctl interface for autofs mount point control. 32 */ 33 34 struct args_protover { 35 __u32 version; 36 }; 37 38 struct args_protosubver { 39 __u32 sub_version; 40 }; 41 42 struct args_openmount { 43 __u32 devid; 44 }; 45 46 struct args_ready { 47 __u32 token; 48 }; 49 50 struct args_fail { 51 __u32 token; 52 __s32 status; 53 }; 54 55 struct args_setpipefd { 56 __s32 pipefd; 57 }; 58 59 struct args_timeout { 60 __u64 timeout; 61 }; 62 63 struct args_requester { 64 __u32 uid; 65 __u32 gid; 66 }; 67 68 struct args_expire { 69 __u32 how; 70 }; 71 72 struct args_askumount { 73 __u32 may_umount; 74 }; 75 76 struct args_ismountpoint { 77 union { 78 struct args_in { 79 __u32 type; 80 } in; 81 struct args_out { 82 __u32 devid; 83 __u32 magic; 84 } out; 85 }; 86 }; 87 88 /* 89 * All the ioctls use this structure. 90 * When sending a path size must account for the total length 91 * of the chunk of memory otherwise is is the size of the 92 * structure. 93 */ 94 95 struct autofs_dev_ioctl { 96 __u32 ver_major; 97 __u32 ver_minor; 98 __u32 size; /* total size of data passed in 99 * including this struct */ 100 __s32 ioctlfd; /* automount command fd */ 101 102 /* Command parameters */ 103 104 union { 105 struct args_protover protover; 106 struct args_protosubver protosubver; 107 struct args_openmount openmount; 108 struct args_ready ready; 109 struct args_fail fail; 110 struct args_setpipefd setpipefd; 111 struct args_timeout timeout; 112 struct args_requester requester; 113 struct args_expire expire; 114 struct args_askumount askumount; 115 struct args_ismountpoint ismountpoint; 116 }; 117 118 char path[0]; 119 }; 120 121 static inline void init_autofs_dev_ioctl(struct autofs_dev_ioctl *in) 122 { 123 memset(in, 0, sizeof(struct autofs_dev_ioctl)); 124 in->ver_major = AUTOFS_DEV_IOCTL_VERSION_MAJOR; 125 in->ver_minor = AUTOFS_DEV_IOCTL_VERSION_MINOR; 126 in->size = sizeof(struct autofs_dev_ioctl); 127 in->ioctlfd = -1; 128 } 129 130 /* 131 * If you change this make sure you make the corresponding change 132 * to autofs-dev-ioctl.c:lookup_ioctl() 133 */ 134 enum { 135 /* Get various version info */ 136 AUTOFS_DEV_IOCTL_VERSION_CMD = 0x71, 137 AUTOFS_DEV_IOCTL_PROTOVER_CMD, 138 AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD, 139 140 /* Open mount ioctl fd */ 141 AUTOFS_DEV_IOCTL_OPENMOUNT_CMD, 142 143 /* Close mount ioctl fd */ 144 AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD, 145 146 /* Mount/expire status returns */ 147 AUTOFS_DEV_IOCTL_READY_CMD, 148 AUTOFS_DEV_IOCTL_FAIL_CMD, 149 150 /* Activate/deactivate autofs mount */ 151 AUTOFS_DEV_IOCTL_SETPIPEFD_CMD, 152 AUTOFS_DEV_IOCTL_CATATONIC_CMD, 153 154 /* Expiry timeout */ 155 AUTOFS_DEV_IOCTL_TIMEOUT_CMD, 156 157 /* Get mount last requesting uid and gid */ 158 AUTOFS_DEV_IOCTL_REQUESTER_CMD, 159 160 /* Check for eligible expire candidates */ 161 AUTOFS_DEV_IOCTL_EXPIRE_CMD, 162 163 /* Request busy status */ 164 AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD, 165 166 /* Check if path is a mountpoint */ 167 AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD, 168 }; 169 170 #define AUTOFS_IOCTL 0x93 171 172 #define AUTOFS_DEV_IOCTL_VERSION \ 173 _IOWR(AUTOFS_IOCTL, \ 174 AUTOFS_DEV_IOCTL_VERSION_CMD, struct autofs_dev_ioctl) 175 176 #define AUTOFS_DEV_IOCTL_PROTOVER \ 177 _IOWR(AUTOFS_IOCTL, \ 178 AUTOFS_DEV_IOCTL_PROTOVER_CMD, struct autofs_dev_ioctl) 179 180 #define AUTOFS_DEV_IOCTL_PROTOSUBVER \ 181 _IOWR(AUTOFS_IOCTL, \ 182 AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD, struct autofs_dev_ioctl) 183 184 #define AUTOFS_DEV_IOCTL_OPENMOUNT \ 185 _IOWR(AUTOFS_IOCTL, \ 186 AUTOFS_DEV_IOCTL_OPENMOUNT_CMD, struct autofs_dev_ioctl) 187 188 #define AUTOFS_DEV_IOCTL_CLOSEMOUNT \ 189 _IOWR(AUTOFS_IOCTL, \ 190 AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD, struct autofs_dev_ioctl) 191 192 #define AUTOFS_DEV_IOCTL_READY \ 193 _IOWR(AUTOFS_IOCTL, \ 194 AUTOFS_DEV_IOCTL_READY_CMD, struct autofs_dev_ioctl) 195 196 #define AUTOFS_DEV_IOCTL_FAIL \ 197 _IOWR(AUTOFS_IOCTL, \ 198 AUTOFS_DEV_IOCTL_FAIL_CMD, struct autofs_dev_ioctl) 199 200 #define AUTOFS_DEV_IOCTL_SETPIPEFD \ 201 _IOWR(AUTOFS_IOCTL, \ 202 AUTOFS_DEV_IOCTL_SETPIPEFD_CMD, struct autofs_dev_ioctl) 203 204 #define AUTOFS_DEV_IOCTL_CATATONIC \ 205 _IOWR(AUTOFS_IOCTL, \ 206 AUTOFS_DEV_IOCTL_CATATONIC_CMD, struct autofs_dev_ioctl) 207 208 #define AUTOFS_DEV_IOCTL_TIMEOUT \ 209 _IOWR(AUTOFS_IOCTL, \ 210 AUTOFS_DEV_IOCTL_TIMEOUT_CMD, struct autofs_dev_ioctl) 211 212 #define AUTOFS_DEV_IOCTL_REQUESTER \ 213 _IOWR(AUTOFS_IOCTL, \ 214 AUTOFS_DEV_IOCTL_REQUESTER_CMD, struct autofs_dev_ioctl) 215 216 #define AUTOFS_DEV_IOCTL_EXPIRE \ 217 _IOWR(AUTOFS_IOCTL, \ 218 AUTOFS_DEV_IOCTL_EXPIRE_CMD, struct autofs_dev_ioctl) 219 220 #define AUTOFS_DEV_IOCTL_ASKUMOUNT \ 221 _IOWR(AUTOFS_IOCTL, \ 222 AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD, struct autofs_dev_ioctl) 223 224 #define AUTOFS_DEV_IOCTL_ISMOUNTPOINT \ 225 _IOWR(AUTOFS_IOCTL, \ 226 AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD, struct autofs_dev_ioctl) 227 228 #endif /* _LINUX_AUTO_DEV_IOCTL_H */ 229