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