| 1 | /* |
| 2 | * Copyright (c) 2011-2012 The DragonFly Project. All rights reserved. |
| 3 | * |
| 4 | * This code is derived from software contributed to The DragonFly Project |
| 5 | * by Matthew Dillon <dillon@dragonflybsd.org> |
| 6 | * by Venkatesh Srinivas <vsrinivas@dragonflybsd.org> |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in |
| 16 | * the documentation and/or other materials provided with the |
| 17 | * distribution. |
| 18 | * 3. Neither the name of The DragonFly Project nor the names of its |
| 19 | * contributors may be used to endorse or promote products derived |
| 20 | * from this software without specific, prior written permission. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 23 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 24 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 25 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 26 | * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 27 | * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 28 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 29 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 30 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 31 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 32 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 33 | * SUCH DAMAGE. |
| 34 | */ |
| 35 | /* |
| 36 | * Ioctl Functions. |
| 37 | * |
| 38 | * WARNING! The ioctl functions which manipulate the connection state need |
| 39 | * to be able to run without deadlock on the volume's chain lock. |
| 40 | * Most of these functions use a separate lock. |
| 41 | */ |
| 42 | |
| 43 | #include "hammer2.h" |
| 44 | |
| 45 | static int hammer2_ioctl_get_version(hammer2_inode_t *ip, void *data); |
| 46 | static int hammer2_ioctl_get_remote(hammer2_inode_t *ip, void *data); |
| 47 | static int hammer2_ioctl_add_remote(hammer2_inode_t *ip, void *data); |
| 48 | static int hammer2_ioctl_del_remote(hammer2_inode_t *ip, void *data); |
| 49 | static int hammer2_ioctl_rep_remote(hammer2_inode_t *ip, void *data); |
| 50 | static int hammer2_ioctl_get_socket(hammer2_inode_t *ip, void *data); |
| 51 | static int hammer2_ioctl_set_socket(hammer2_inode_t *ip, void *data); |
| 52 | |
| 53 | int |
| 54 | hammer2_ioctl(hammer2_inode_t *ip, u_long com, void *data, int fflag, |
| 55 | struct ucred *cred) |
| 56 | { |
| 57 | int error; |
| 58 | |
| 59 | /* |
| 60 | * Standard root cred checks, will be selectively ignored below |
| 61 | * for ioctls that do not require root creds. |
| 62 | */ |
| 63 | error = priv_check_cred(cred, PRIV_HAMMER_IOCTL, 0); |
| 64 | |
| 65 | switch(com) { |
| 66 | case HAMMER2IOC_GET_VERSION: |
| 67 | /* |
| 68 | * Retrieve version and basic status |
| 69 | */ |
| 70 | error = hammer2_ioctl_get_version(ip, data); |
| 71 | break; |
| 72 | case HAMMER2IOC_GET_REMOTE: |
| 73 | /* |
| 74 | * Retrieve information about a remote |
| 75 | */ |
| 76 | if (error == 0) |
| 77 | error = hammer2_ioctl_get_remote(ip, data); |
| 78 | break; |
| 79 | case HAMMER2IOC_ADD_REMOTE: |
| 80 | /* |
| 81 | * Add new remote entry. |
| 82 | */ |
| 83 | if (error == 0) |
| 84 | error = hammer2_ioctl_add_remote(ip, data); |
| 85 | break; |
| 86 | case HAMMER2IOC_DEL_REMOTE: |
| 87 | /* |
| 88 | * Delete existing remote entry |
| 89 | */ |
| 90 | if (error == 0) |
| 91 | error = hammer2_ioctl_del_remote(ip, data); |
| 92 | break; |
| 93 | case HAMMER2IOC_REP_REMOTE: |
| 94 | /* |
| 95 | * Replace existing remote entry |
| 96 | */ |
| 97 | if (error == 0) |
| 98 | error = hammer2_ioctl_rep_remote(ip, data); |
| 99 | break; |
| 100 | case HAMMER2IOC_GET_SOCKET: |
| 101 | /* |
| 102 | * Retrieve communications socket |
| 103 | */ |
| 104 | if (error == 0) |
| 105 | error = hammer2_ioctl_get_socket(ip, data); |
| 106 | break; |
| 107 | case HAMMER2IOC_SET_SOCKET: |
| 108 | /* |
| 109 | * Set communications socket for connection |
| 110 | */ |
| 111 | if (error == 0) |
| 112 | error = hammer2_ioctl_set_socket(ip, data); |
| 113 | break; |
| 114 | default: |
| 115 | error = EOPNOTSUPP; |
| 116 | break; |
| 117 | } |
| 118 | return (error); |
| 119 | } |
| 120 | |
| 121 | /* |
| 122 | * Retrieve version and basic info |
| 123 | */ |
| 124 | static int |
| 125 | hammer2_ioctl_get_version(hammer2_inode_t *ip, void *data) |
| 126 | { |
| 127 | hammer2_mount_t *hmp = ip->hmp; |
| 128 | hammer2_ioc_version_t *version = data; |
| 129 | |
| 130 | version->version = hmp->voldata.version; |
| 131 | return 0; |
| 132 | } |
| 133 | |
| 134 | /* |
| 135 | * Retrieve information about a remote |
| 136 | */ |
| 137 | static int |
| 138 | hammer2_ioctl_get_remote(hammer2_inode_t *ip, void *data) |
| 139 | { |
| 140 | hammer2_mount_t *hmp = ip->hmp; |
| 141 | hammer2_ioc_remote_t *remote = data; |
| 142 | int copyid = remote->copyid; |
| 143 | |
| 144 | if (copyid < 0 || copyid >= HAMMER2_COPYID_COUNT) |
| 145 | return (EINVAL); |
| 146 | |
| 147 | hammer2_voldata_lock(hmp); |
| 148 | remote->copy1 = hmp->voldata.copyinfo[copyid]; |
| 149 | hammer2_voldata_unlock(hmp); |
| 150 | |
| 151 | /* |
| 152 | * Adjust nextid (GET only) |
| 153 | */ |
| 154 | while (++copyid < HAMMER2_COPYID_COUNT && |
| 155 | hmp->voldata.copyinfo[copyid].copyid == 0) { |
| 156 | ++copyid; |
| 157 | } |
| 158 | if (copyid == HAMMER2_COPYID_COUNT) |
| 159 | remote->nextid = -1; |
| 160 | else |
| 161 | remote->nextid = copyid; |
| 162 | |
| 163 | return(0); |
| 164 | } |
| 165 | |
| 166 | /* |
| 167 | * Add new remote entry |
| 168 | */ |
| 169 | static int |
| 170 | hammer2_ioctl_add_remote(hammer2_inode_t *ip, void *data) |
| 171 | { |
| 172 | hammer2_mount_t *hmp = ip->hmp; |
| 173 | hammer2_ioc_remote_t *remote = data; |
| 174 | int copyid = remote->copyid; |
| 175 | int error = 0; |
| 176 | |
| 177 | if (copyid >= HAMMER2_COPYID_COUNT) |
| 178 | return (EINVAL); |
| 179 | |
| 180 | hammer2_voldata_lock(hmp); |
| 181 | if (copyid < 0) { |
| 182 | for (copyid = 1; copyid < HAMMER2_COPYID_COUNT; ++copyid) { |
| 183 | if (hmp->voldata.copyinfo[copyid].copyid == 0) |
| 184 | break; |
| 185 | } |
| 186 | if (copyid == HAMMER2_COPYID_COUNT) { |
| 187 | error = ENOSPC; |
| 188 | goto failed; |
| 189 | } |
| 190 | } |
| 191 | hammer2_modify_volume(hmp); |
| 192 | kprintf("copyid %d\n", copyid); |
| 193 | remote->copy1.copyid = copyid; |
| 194 | hmp->voldata.copyinfo[copyid] = remote->copy1; |
| 195 | failed: |
| 196 | hammer2_voldata_unlock(hmp); |
| 197 | return (error); |
| 198 | } |
| 199 | |
| 200 | /* |
| 201 | * Delete existing remote entry |
| 202 | */ |
| 203 | static int |
| 204 | hammer2_ioctl_del_remote(hammer2_inode_t *ip, void *data) |
| 205 | { |
| 206 | hammer2_mount_t *hmp = ip->hmp; |
| 207 | hammer2_ioc_remote_t *remote = data; |
| 208 | int copyid = remote->copyid; |
| 209 | int error = 0; |
| 210 | |
| 211 | if (copyid >= HAMMER2_COPYID_COUNT) |
| 212 | return (EINVAL); |
| 213 | remote->copy1.path[sizeof(remote->copy1.path) - 1] = 0; |
| 214 | hammer2_voldata_lock(hmp); |
| 215 | if (copyid < 0) { |
| 216 | for (copyid = 1; copyid < HAMMER2_COPYID_COUNT; ++copyid) { |
| 217 | if (hmp->voldata.copyinfo[copyid].copyid == 0) |
| 218 | continue; |
| 219 | if (strcmp(remote->copy1.path, |
| 220 | hmp->voldata.copyinfo[copyid].path) == 0) { |
| 221 | break; |
| 222 | } |
| 223 | } |
| 224 | if (copyid == HAMMER2_COPYID_COUNT) { |
| 225 | error = ENOENT; |
| 226 | goto failed; |
| 227 | } |
| 228 | } |
| 229 | hammer2_modify_volume(hmp); |
| 230 | hmp->voldata.copyinfo[copyid].copyid = 0; |
| 231 | failed: |
| 232 | hammer2_voldata_unlock(hmp); |
| 233 | return (error); |
| 234 | } |
| 235 | |
| 236 | /* |
| 237 | * Replace existing remote entry |
| 238 | */ |
| 239 | static int |
| 240 | hammer2_ioctl_rep_remote(hammer2_inode_t *ip, void *data) |
| 241 | { |
| 242 | hammer2_mount_t *hmp = ip->hmp; |
| 243 | hammer2_ioc_remote_t *remote = data; |
| 244 | int copyid = remote->copyid; |
| 245 | |
| 246 | if (copyid < 0 || copyid >= HAMMER2_COPYID_COUNT) |
| 247 | return (EINVAL); |
| 248 | |
| 249 | hammer2_voldata_lock(hmp); |
| 250 | hammer2_voldata_unlock(hmp); |
| 251 | |
| 252 | return(0); |
| 253 | } |
| 254 | |
| 255 | /* |
| 256 | * Retrieve communications socket |
| 257 | */ |
| 258 | static int |
| 259 | hammer2_ioctl_get_socket(hammer2_inode_t *ip, void *data) |
| 260 | { |
| 261 | return (EOPNOTSUPP); |
| 262 | } |
| 263 | |
| 264 | /* |
| 265 | * Set communications socket for connection |
| 266 | */ |
| 267 | static int |
| 268 | hammer2_ioctl_set_socket(hammer2_inode_t *ip, void *data) |
| 269 | { |
| 270 | hammer2_mount_t *hmp = ip->hmp; |
| 271 | hammer2_ioc_remote_t *remote = data; |
| 272 | int copyid = remote->copyid; |
| 273 | |
| 274 | if (copyid < 0 || copyid >= HAMMER2_COPYID_COUNT) |
| 275 | return (EINVAL); |
| 276 | |
| 277 | hammer2_voldata_lock(hmp); |
| 278 | hammer2_voldata_unlock(hmp); |
| 279 | |
| 280 | return(0); |
| 281 | } |