1 /* 2 * Copyright (c) 2020 iXsystems, Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28 #include <sys/param.h> 29 #include <sys/buf.h> 30 #include <sys/cmn_err.h> 31 #include <sys/conf.h> 32 #include <sys/dmu.h> 33 #include <sys/dmu_impl.h> 34 #include <sys/dmu_objset.h> 35 #include <sys/dmu_send.h> 36 #include <sys/dmu_tx.h> 37 #include <sys/dsl_bookmark.h> 38 #include <sys/dsl_crypt.h> 39 #include <sys/dsl_dataset.h> 40 #include <sys/dsl_deleg.h> 41 #include <sys/dsl_destroy.h> 42 #include <sys/dsl_dir.h> 43 #include <sys/dsl_prop.h> 44 #include <sys/dsl_scan.h> 45 #include <sys/dsl_userhold.h> 46 #include <sys/errno.h> 47 #include <sys/eventhandler.h> 48 #include <sys/file.h> 49 #include <sys/fm/util.h> 50 #include <sys/fs/zfs.h> 51 #include <sys/kernel.h> 52 #include <sys/kmem.h> 53 #include <sys/lock.h> 54 #include <sys/malloc.h> 55 #include <sys/mount.h> 56 #include <sys/mutex.h> 57 #include <sys/nvpair.h> 58 #include <sys/policy.h> 59 #include <sys/proc.h> 60 #include <sys/sdt.h> 61 #include <sys/spa.h> 62 #include <sys/spa_impl.h> 63 #include <sys/stat.h> 64 #include <sys/sunddi.h> 65 #include <sys/sysctl.h> 66 #include <sys/systm.h> 67 #include <sys/taskqueue.h> 68 #include <sys/uio.h> 69 #include <sys/vdev.h> 70 #include <sys/vdev_removal.h> 71 #include <sys/zap.h> 72 #include <sys/zcp.h> 73 #include <sys/zfeature.h> 74 #include <sys/zfs_context.h> 75 #include <sys/zfs_ctldir.h> 76 #include <sys/zfs_dir.h> 77 #include <sys/zfs_ioctl.h> 78 #include <sys/zfs_ioctl_compat.h> 79 #include <sys/zfs_ioctl_impl.h> 80 #include <sys/zfs_onexit.h> 81 #include <sys/zfs_vfsops.h> 82 #include <sys/zfs_znode.h> 83 #include <sys/zio_checksum.h> 84 #include <sys/zone.h> 85 #include <sys/zvol.h> 86 87 #include "zfs_comutil.h" 88 #include "zfs_deleg.h" 89 #include "zfs_namecheck.h" 90 #include "zfs_prop.h" 91 92 SYSCTL_DECL(_vfs_zfs); 93 SYSCTL_DECL(_vfs_zfs_vdev); 94 95 extern uint_t rrw_tsd_key; 96 static int zfs_version_ioctl = ZFS_IOCVER_OZFS; 97 SYSCTL_DECL(_vfs_zfs_version); 98 SYSCTL_INT(_vfs_zfs_version, OID_AUTO, ioctl, CTLFLAG_RD, &zfs_version_ioctl, 99 0, "ZFS_IOCTL_VERSION"); 100 101 static struct cdev *zfsdev; 102 103 static struct root_hold_token *zfs_root_token; 104 105 extern uint_t rrw_tsd_key; 106 extern uint_t zfs_allow_log_key; 107 extern uint_t zfs_geom_probe_vdev_key; 108 109 static int zfs__init(void); 110 static int zfs__fini(void); 111 static void zfs_shutdown(void *, int); 112 113 static eventhandler_tag zfs_shutdown_event_tag; 114 115 #define ZFS_MIN_KSTACK_PAGES 4 116 117 static int 118 zfsdev_ioctl(struct cdev *dev, ulong_t zcmd, caddr_t arg, int flag, 119 struct thread *td) 120 { 121 uint_t len; 122 int vecnum; 123 zfs_iocparm_t *zp; 124 zfs_cmd_t *zc; 125 #ifdef ZFS_LEGACY_SUPPORT 126 zfs_cmd_legacy_t *zcl; 127 #endif 128 int rc, error; 129 void *uaddr; 130 131 len = IOCPARM_LEN(zcmd); 132 vecnum = zcmd & 0xff; 133 zp = (void *)arg; 134 error = 0; 135 #ifdef ZFS_LEGACY_SUPPORT 136 zcl = NULL; 137 #endif 138 139 if (len != sizeof (zfs_iocparm_t)) 140 return (EINVAL); 141 142 uaddr = (void *)(uintptr_t)zp->zfs_cmd; 143 zc = vmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 144 #ifdef ZFS_LEGACY_SUPPORT 145 /* 146 * Remap ioctl code for legacy user binaries 147 */ 148 if (zp->zfs_ioctl_version == ZFS_IOCVER_LEGACY) { 149 vecnum = zfs_ioctl_legacy_to_ozfs(vecnum); 150 if (vecnum < 0) { 151 vmem_free(zc, sizeof (zfs_cmd_t)); 152 return (ENOTSUP); 153 } 154 zcl = vmem_zalloc(sizeof (zfs_cmd_legacy_t), KM_SLEEP); 155 if (copyin(uaddr, zcl, sizeof (zfs_cmd_legacy_t))) { 156 error = SET_ERROR(EFAULT); 157 goto out; 158 } 159 zfs_cmd_legacy_to_ozfs(zcl, zc); 160 } else 161 #endif 162 if (copyin(uaddr, zc, sizeof (zfs_cmd_t))) { 163 error = SET_ERROR(EFAULT); 164 goto out; 165 } 166 error = zfsdev_ioctl_common(vecnum, zc, 0); 167 #ifdef ZFS_LEGACY_SUPPORT 168 if (zcl) { 169 zfs_cmd_ozfs_to_legacy(zc, zcl); 170 rc = copyout(zcl, uaddr, sizeof (*zcl)); 171 } else 172 #endif 173 { 174 rc = copyout(zc, uaddr, sizeof (*zc)); 175 } 176 if (error == 0 && rc != 0) 177 error = SET_ERROR(EFAULT); 178 out: 179 #ifdef ZFS_LEGACY_SUPPORT 180 if (zcl) 181 vmem_free(zcl, sizeof (zfs_cmd_legacy_t)); 182 #endif 183 vmem_free(zc, sizeof (zfs_cmd_t)); 184 MPASS(tsd_get(rrw_tsd_key) == NULL); 185 return (error); 186 } 187 188 static void 189 zfsdev_close(void *data) 190 { 191 zfsdev_state_destroy(data); 192 } 193 194 void 195 zfsdev_private_set_state(void *priv __unused, zfsdev_state_t *zs) 196 { 197 devfs_set_cdevpriv(zs, zfsdev_close); 198 } 199 200 zfsdev_state_t * 201 zfsdev_private_get_state(void *priv) 202 { 203 return (priv); 204 } 205 206 static int 207 zfsdev_open(struct cdev *devp __unused, int flag __unused, int mode __unused, 208 struct thread *td __unused) 209 { 210 int error; 211 212 mutex_enter(&zfsdev_state_lock); 213 error = zfsdev_state_init(NULL); 214 mutex_exit(&zfsdev_state_lock); 215 216 return (error); 217 } 218 219 static struct cdevsw zfs_cdevsw = { 220 .d_version = D_VERSION, 221 .d_open = zfsdev_open, 222 .d_ioctl = zfsdev_ioctl, 223 .d_name = ZFS_DRIVER 224 }; 225 226 int 227 zfsdev_attach(void) 228 { 229 struct make_dev_args args; 230 231 make_dev_args_init(&args); 232 args.mda_flags = MAKEDEV_CHECKNAME | MAKEDEV_WAITOK; 233 args.mda_devsw = &zfs_cdevsw; 234 args.mda_cr = NULL; 235 args.mda_uid = UID_ROOT; 236 args.mda_gid = GID_OPERATOR; 237 args.mda_mode = 0666; 238 return (make_dev_s(&args, &zfsdev, ZFS_DRIVER)); 239 } 240 241 void 242 zfsdev_detach(void) 243 { 244 if (zfsdev != NULL) 245 destroy_dev(zfsdev); 246 } 247 248 int 249 zfs__init(void) 250 { 251 int error; 252 253 #if KSTACK_PAGES < ZFS_MIN_KSTACK_PAGES 254 printf("ZFS NOTICE: KSTACK_PAGES is %d which could result in stack " 255 "overflow panic!\nPlease consider adding " 256 "'options KSTACK_PAGES=%d' to your kernel config\n", KSTACK_PAGES, 257 ZFS_MIN_KSTACK_PAGES); 258 #endif 259 zfs_root_token = root_mount_hold("ZFS"); 260 if ((error = zfs_kmod_init()) != 0) { 261 printf("ZFS: Failed to Load ZFS Filesystem" 262 ", rc = %d\n", error); 263 root_mount_rel(zfs_root_token); 264 return (error); 265 } 266 267 268 tsd_create(&zfs_geom_probe_vdev_key, NULL); 269 270 printf("ZFS storage pool version: features support (" 271 SPA_VERSION_STRING ")\n"); 272 root_mount_rel(zfs_root_token); 273 ddi_sysevent_init(); 274 return (0); 275 } 276 277 int 278 zfs__fini(void) 279 { 280 if (zfs_busy() || zvol_busy() || 281 zio_injection_enabled) { 282 return (EBUSY); 283 } 284 zfs_kmod_fini(); 285 tsd_destroy(&zfs_geom_probe_vdev_key); 286 return (0); 287 } 288 289 static void 290 zfs_shutdown(void *arg __unused, int howto __unused) 291 { 292 293 /* 294 * ZFS fini routines can not properly work in a panic-ed system. 295 */ 296 if (panicstr == NULL) 297 zfs__fini(); 298 } 299 300 static int 301 zfs_modevent(module_t mod, int type, void *unused __unused) 302 { 303 int err; 304 305 switch (type) { 306 case MOD_LOAD: 307 err = zfs__init(); 308 if (err == 0) 309 zfs_shutdown_event_tag = EVENTHANDLER_REGISTER( 310 shutdown_post_sync, zfs_shutdown, NULL, 311 SHUTDOWN_PRI_FIRST); 312 return (err); 313 case MOD_UNLOAD: 314 err = zfs__fini(); 315 if (err == 0 && zfs_shutdown_event_tag != NULL) 316 EVENTHANDLER_DEREGISTER(shutdown_post_sync, 317 zfs_shutdown_event_tag); 318 return (err); 319 case MOD_SHUTDOWN: 320 return (0); 321 default: 322 break; 323 } 324 return (EOPNOTSUPP); 325 } 326 327 static moduledata_t zfs_mod = { 328 "zfsctrl", 329 zfs_modevent, 330 0 331 }; 332 333 #ifdef _KERNEL 334 EVENTHANDLER_DEFINE(mountroot, spa_boot_init, NULL, 0); 335 #endif 336 337 FEATURE(zfs, "OpenZFS support"); 338 339 DECLARE_MODULE(zfsctrl, zfs_mod, SI_SUB_CLOCKS, SI_ORDER_ANY); 340 MODULE_VERSION(zfsctrl, 1); 341 #if __FreeBSD_version > 1300092 342 MODULE_DEPEND(zfsctrl, xdr, 1, 1, 1); 343 #else 344 MODULE_DEPEND(zfsctrl, krpc, 1, 1, 1); 345 #endif 346 MODULE_DEPEND(zfsctrl, acl_nfs4, 1, 1, 1); 347 MODULE_DEPEND(zfsctrl, crypto, 1, 1, 1); 348 MODULE_DEPEND(zfsctrl, zlib, 1, 1, 1); 349