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 _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 }; 113 114 static inline void init_autofs_dev_ioctl(struct autofs_dev_ioctl *in) 115 { 116 memset(in, 0, AUTOFS_DEV_IOCTL_SIZE); 117 in->ver_major = AUTOFS_DEV_IOCTL_VERSION_MAJOR; 118 in->ver_minor = AUTOFS_DEV_IOCTL_VERSION_MINOR; 119 in->size = AUTOFS_DEV_IOCTL_SIZE; 120 in->ioctlfd = -1; 121 } 122 123 enum { 124 /* Get various version info */ 125 AUTOFS_DEV_IOCTL_VERSION_CMD = 0x71, 126 AUTOFS_DEV_IOCTL_PROTOVER_CMD, 127 AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD, 128 129 /* Open mount ioctl fd */ 130 AUTOFS_DEV_IOCTL_OPENMOUNT_CMD, 131 132 /* Close mount ioctl fd */ 133 AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD, 134 135 /* Mount/expire status returns */ 136 AUTOFS_DEV_IOCTL_READY_CMD, 137 AUTOFS_DEV_IOCTL_FAIL_CMD, 138 139 /* Activate/deactivate autofs mount */ 140 AUTOFS_DEV_IOCTL_SETPIPEFD_CMD, 141 AUTOFS_DEV_IOCTL_CATATONIC_CMD, 142 143 /* Expiry timeout */ 144 AUTOFS_DEV_IOCTL_TIMEOUT_CMD, 145 146 /* Get mount last requesting uid and gid */ 147 AUTOFS_DEV_IOCTL_REQUESTER_CMD, 148 149 /* Check for eligible expire candidates */ 150 AUTOFS_DEV_IOCTL_EXPIRE_CMD, 151 152 /* Request busy status */ 153 AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD, 154 155 /* Check if path is a mountpoint */ 156 AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD, 157 }; 158 159 #define AUTOFS_DEV_IOCTL_VERSION \ 160 _IOWR(AUTOFS_IOCTL, \ 161 AUTOFS_DEV_IOCTL_VERSION_CMD, struct autofs_dev_ioctl) 162 163 #define AUTOFS_DEV_IOCTL_PROTOVER \ 164 _IOWR(AUTOFS_IOCTL, \ 165 AUTOFS_DEV_IOCTL_PROTOVER_CMD, struct autofs_dev_ioctl) 166 167 #define AUTOFS_DEV_IOCTL_PROTOSUBVER \ 168 _IOWR(AUTOFS_IOCTL, \ 169 AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD, struct autofs_dev_ioctl) 170 171 #define AUTOFS_DEV_IOCTL_OPENMOUNT \ 172 _IOWR(AUTOFS_IOCTL, \ 173 AUTOFS_DEV_IOCTL_OPENMOUNT_CMD, struct autofs_dev_ioctl) 174 175 #define AUTOFS_DEV_IOCTL_CLOSEMOUNT \ 176 _IOWR(AUTOFS_IOCTL, \ 177 AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD, struct autofs_dev_ioctl) 178 179 #define AUTOFS_DEV_IOCTL_READY \ 180 _IOWR(AUTOFS_IOCTL, \ 181 AUTOFS_DEV_IOCTL_READY_CMD, struct autofs_dev_ioctl) 182 183 #define AUTOFS_DEV_IOCTL_FAIL \ 184 _IOWR(AUTOFS_IOCTL, \ 185 AUTOFS_DEV_IOCTL_FAIL_CMD, struct autofs_dev_ioctl) 186 187 #define AUTOFS_DEV_IOCTL_SETPIPEFD \ 188 _IOWR(AUTOFS_IOCTL, \ 189 AUTOFS_DEV_IOCTL_SETPIPEFD_CMD, struct autofs_dev_ioctl) 190 191 #define AUTOFS_DEV_IOCTL_CATATONIC \ 192 _IOWR(AUTOFS_IOCTL, \ 193 AUTOFS_DEV_IOCTL_CATATONIC_CMD, struct autofs_dev_ioctl) 194 195 #define AUTOFS_DEV_IOCTL_TIMEOUT \ 196 _IOWR(AUTOFS_IOCTL, \ 197 AUTOFS_DEV_IOCTL_TIMEOUT_CMD, struct autofs_dev_ioctl) 198 199 #define AUTOFS_DEV_IOCTL_REQUESTER \ 200 _IOWR(AUTOFS_IOCTL, \ 201 AUTOFS_DEV_IOCTL_REQUESTER_CMD, struct autofs_dev_ioctl) 202 203 #define AUTOFS_DEV_IOCTL_EXPIRE \ 204 _IOWR(AUTOFS_IOCTL, \ 205 AUTOFS_DEV_IOCTL_EXPIRE_CMD, struct autofs_dev_ioctl) 206 207 #define AUTOFS_DEV_IOCTL_ASKUMOUNT \ 208 _IOWR(AUTOFS_IOCTL, \ 209 AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD, struct autofs_dev_ioctl) 210 211 #define AUTOFS_DEV_IOCTL_ISMOUNTPOINT \ 212 _IOWR(AUTOFS_IOCTL, \ 213 AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD, struct autofs_dev_ioctl) 214 215 #endif /* _UAPI_LINUX_AUTO_DEV_IOCTL_H */ 216