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/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/types.h> 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/conf.h> 35 #include <sys/kernel.h> 36 #include <sys/lock.h> 37 #include <sys/malloc.h> 38 #include <sys/mutex.h> 39 #include <sys/proc.h> 40 #include <sys/errno.h> 41 #include <sys/uio.h> 42 #include <sys/buf.h> 43 #include <sys/file.h> 44 #include <sys/kmem.h> 45 #include <sys/conf.h> 46 #include <sys/cmn_err.h> 47 #include <sys/stat.h> 48 #include <sys/zfs_ioctl.h> 49 #include <sys/zfs_vfsops.h> 50 #include <sys/zfs_znode.h> 51 #include <sys/zap.h> 52 #include <sys/spa.h> 53 #include <sys/spa_impl.h> 54 #include <sys/vdev.h> 55 #include <sys/vdev_impl.h> 56 #include <sys/dmu.h> 57 #include <sys/dsl_dir.h> 58 #include <sys/dsl_dataset.h> 59 #include <sys/dsl_prop.h> 60 #include <sys/dsl_deleg.h> 61 #include <sys/dmu_objset.h> 62 #include <sys/dmu_impl.h> 63 #include <sys/dmu_tx.h> 64 #include <sys/sunddi.h> 65 #include <sys/policy.h> 66 #include <sys/zone.h> 67 #include <sys/nvpair.h> 68 #include <sys/mount.h> 69 #include <sys/taskqueue.h> 70 #include <sys/sdt.h> 71 #include <sys/fs/zfs.h> 72 #include <sys/zfs_ctldir.h> 73 #include <sys/zfs_dir.h> 74 #include <sys/zfs_onexit.h> 75 #include <sys/zvol.h> 76 #include <sys/dsl_scan.h> 77 #include <sys/dmu_objset.h> 78 #include <sys/dmu_send.h> 79 #include <sys/dsl_destroy.h> 80 #include <sys/dsl_bookmark.h> 81 #include <sys/dsl_userhold.h> 82 #include <sys/zfeature.h> 83 #include <sys/zcp.h> 84 #include <sys/zio_checksum.h> 85 #include <sys/vdev_removal.h> 86 #include <sys/dsl_crypt.h> 87 88 #include <sys/zfs_ioctl_compat.h> 89 #include <sys/zfs_context.h> 90 91 #include <sys/arc_impl.h> 92 #include <sys/dsl_pool.h> 93 94 95 /* BEGIN CSTYLED */ 96 SYSCTL_DECL(_vfs_zfs); 97 SYSCTL_NODE(_vfs_zfs, OID_AUTO, arc, CTLFLAG_RW, 0, "ZFS adaptive replacement cache"); 98 SYSCTL_NODE(_vfs_zfs, OID_AUTO, condense, CTLFLAG_RW, 0, "ZFS condense"); 99 SYSCTL_NODE(_vfs_zfs, OID_AUTO, dbuf, CTLFLAG_RW, 0, "ZFS disk buf cache"); 100 SYSCTL_NODE(_vfs_zfs, OID_AUTO, dbuf_cache, CTLFLAG_RW, 0, "ZFS disk buf cache"); 101 SYSCTL_NODE(_vfs_zfs, OID_AUTO, deadman, CTLFLAG_RW, 0, "ZFS deadman"); 102 SYSCTL_NODE(_vfs_zfs, OID_AUTO, dedup, CTLFLAG_RW, 0, "ZFS dedup"); 103 SYSCTL_NODE(_vfs_zfs, OID_AUTO, l2arc, CTLFLAG_RW, 0, "ZFS l2arc"); 104 SYSCTL_NODE(_vfs_zfs, OID_AUTO, livelist, CTLFLAG_RW, 0, "ZFS livelist"); 105 SYSCTL_NODE(_vfs_zfs, OID_AUTO, lua, CTLFLAG_RW, 0, "ZFS lua"); 106 SYSCTL_NODE(_vfs_zfs, OID_AUTO, metaslab, CTLFLAG_RW, 0, "ZFS metaslab"); 107 SYSCTL_NODE(_vfs_zfs, OID_AUTO, mg, CTLFLAG_RW, 0, "ZFS metaslab group"); 108 SYSCTL_NODE(_vfs_zfs, OID_AUTO, multihost, CTLFLAG_RW, 0, "ZFS multihost protection"); 109 SYSCTL_NODE(_vfs_zfs, OID_AUTO, prefetch, CTLFLAG_RW, 0, "ZFS prefetch"); 110 SYSCTL_NODE(_vfs_zfs, OID_AUTO, reconstruct, CTLFLAG_RW, 0, "ZFS reconstruct"); 111 SYSCTL_NODE(_vfs_zfs, OID_AUTO, recv, CTLFLAG_RW, 0, "ZFS receive"); 112 SYSCTL_NODE(_vfs_zfs, OID_AUTO, send, CTLFLAG_RW, 0, "ZFS send"); 113 SYSCTL_NODE(_vfs_zfs, OID_AUTO, spa, CTLFLAG_RW, 0, "ZFS space allocation"); 114 SYSCTL_NODE(_vfs_zfs, OID_AUTO, trim, CTLFLAG_RW, 0, "ZFS TRIM"); 115 SYSCTL_NODE(_vfs_zfs, OID_AUTO, txg, CTLFLAG_RW, 0, "ZFS transaction group"); 116 SYSCTL_NODE(_vfs_zfs, OID_AUTO, vdev, CTLFLAG_RW, 0, "ZFS VDEV"); 117 SYSCTL_NODE(_vfs_zfs, OID_AUTO, zevent, CTLFLAG_RW, 0, "ZFS event"); 118 SYSCTL_NODE(_vfs_zfs, OID_AUTO, zil, CTLFLAG_RW, 0, "ZFS ZIL"); 119 SYSCTL_NODE(_vfs_zfs, OID_AUTO, zio, CTLFLAG_RW, 0, "ZFS ZIO"); 120 121 SYSCTL_NODE(_vfs_zfs_livelist, OID_AUTO, condense, CTLFLAG_RW, 0, 122 "ZFS livelist condense"); 123 SYSCTL_NODE(_vfs_zfs_vdev, OID_AUTO, cache, CTLFLAG_RW, 0, "ZFS VDEV Cache"); 124 SYSCTL_NODE(_vfs_zfs_vdev, OID_AUTO, file, CTLFLAG_RW, 0, "ZFS VDEV file"); 125 SYSCTL_NODE(_vfs_zfs_vdev, OID_AUTO, mirror, CTLFLAG_RD, 0, 126 "ZFS VDEV mirror"); 127 128 SYSCTL_DECL(_vfs_zfs_version); 129 SYSCTL_CONST_STRING(_vfs_zfs_version, OID_AUTO, module, CTLFLAG_RD, 130 (ZFS_META_VERSION "-" ZFS_META_RELEASE), "OpenZFS module version"); 131 132 extern arc_state_t ARC_anon; 133 extern arc_state_t ARC_mru; 134 extern arc_state_t ARC_mru_ghost; 135 extern arc_state_t ARC_mfu; 136 extern arc_state_t ARC_mfu_ghost; 137 extern arc_state_t ARC_l2c_only; 138 139 /* 140 * minimum lifespan of a prefetch block in clock ticks 141 * (initialized in arc_init()) 142 */ 143 144 /* arc.c */ 145 146 /* legacy compat */ 147 extern uint64_t l2arc_write_max; /* def max write size */ 148 extern uint64_t l2arc_write_boost; /* extra warmup write */ 149 extern uint64_t l2arc_headroom; /* # of dev writes */ 150 extern uint64_t l2arc_headroom_boost; 151 extern uint64_t l2arc_feed_secs; /* interval seconds */ 152 extern uint64_t l2arc_feed_min_ms; /* min interval msecs */ 153 extern int l2arc_noprefetch; /* don't cache prefetch bufs */ 154 extern int l2arc_feed_again; /* turbo warmup */ 155 extern int l2arc_norw; /* no reads during writes */ 156 157 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, l2arc_write_max, CTLFLAG_RW, 158 &l2arc_write_max, 0, "max write size (LEGACY)"); 159 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, l2arc_write_boost, CTLFLAG_RW, 160 &l2arc_write_boost, 0, "extra write during warmup (LEGACY)"); 161 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, l2arc_headroom, CTLFLAG_RW, 162 &l2arc_headroom, 0, "number of dev writes (LEGACY)"); 163 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, l2arc_feed_secs, CTLFLAG_RW, 164 &l2arc_feed_secs, 0, "interval seconds (LEGACY)"); 165 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, l2arc_feed_min_ms, CTLFLAG_RW, 166 &l2arc_feed_min_ms, 0, "min interval milliseconds (LEGACY)"); 167 168 SYSCTL_INT(_vfs_zfs, OID_AUTO, l2arc_noprefetch, CTLFLAG_RW, 169 &l2arc_noprefetch, 0, "don't cache prefetch bufs (LEGACY)"); 170 SYSCTL_INT(_vfs_zfs, OID_AUTO, l2arc_feed_again, CTLFLAG_RW, 171 &l2arc_feed_again, 0, "turbo warmup (LEGACY)"); 172 SYSCTL_INT(_vfs_zfs, OID_AUTO, l2arc_norw, CTLFLAG_RW, 173 &l2arc_norw, 0, "no reads during writes (LEGACY)"); 174 #if 0 175 extern int zfs_compressed_arc_enabled; 176 SYSCTL_INT(_vfs_zfs, OID_AUTO, compressed_arc_enabled, CTLFLAG_RW, 177 &zfs_compressed_arc_enabled, 1, "compressed arc buffers (LEGACY)"); 178 #endif 179 180 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, anon_size, CTLFLAG_RD, 181 &ARC_anon.arcs_size.rc_count, 0, "size of anonymous state"); 182 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, anon_metadata_esize, CTLFLAG_RD, 183 &ARC_anon.arcs_esize[ARC_BUFC_METADATA].rc_count, 0, 184 "size of anonymous state"); 185 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, anon_data_esize, CTLFLAG_RD, 186 &ARC_anon.arcs_esize[ARC_BUFC_DATA].rc_count, 0, 187 "size of anonymous state"); 188 189 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, mru_size, CTLFLAG_RD, 190 &ARC_mru.arcs_size.rc_count, 0, "size of mru state"); 191 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, mru_metadata_esize, CTLFLAG_RD, 192 &ARC_mru.arcs_esize[ARC_BUFC_METADATA].rc_count, 0, 193 "size of metadata in mru state"); 194 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, mru_data_esize, CTLFLAG_RD, 195 &ARC_mru.arcs_esize[ARC_BUFC_DATA].rc_count, 0, 196 "size of data in mru state"); 197 198 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, mru_ghost_size, CTLFLAG_RD, 199 &ARC_mru_ghost.arcs_size.rc_count, 0, "size of mru ghost state"); 200 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, mru_ghost_metadata_esize, CTLFLAG_RD, 201 &ARC_mru_ghost.arcs_esize[ARC_BUFC_METADATA].rc_count, 0, 202 "size of metadata in mru ghost state"); 203 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, mru_ghost_data_esize, CTLFLAG_RD, 204 &ARC_mru_ghost.arcs_esize[ARC_BUFC_DATA].rc_count, 0, 205 "size of data in mru ghost state"); 206 207 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, mfu_size, CTLFLAG_RD, 208 &ARC_mfu.arcs_size.rc_count, 0, "size of mfu state"); 209 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, mfu_metadata_esize, CTLFLAG_RD, 210 &ARC_mfu.arcs_esize[ARC_BUFC_METADATA].rc_count, 0, 211 "size of metadata in mfu state"); 212 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, mfu_data_esize, CTLFLAG_RD, 213 &ARC_mfu.arcs_esize[ARC_BUFC_DATA].rc_count, 0, 214 "size of data in mfu state"); 215 216 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, mfu_ghost_size, CTLFLAG_RD, 217 &ARC_mfu_ghost.arcs_size.rc_count, 0, "size of mfu ghost state"); 218 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, mfu_ghost_metadata_esize, CTLFLAG_RD, 219 &ARC_mfu_ghost.arcs_esize[ARC_BUFC_METADATA].rc_count, 0, 220 "size of metadata in mfu ghost state"); 221 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, mfu_ghost_data_esize, CTLFLAG_RD, 222 &ARC_mfu_ghost.arcs_esize[ARC_BUFC_DATA].rc_count, 0, 223 "size of data in mfu ghost state"); 224 225 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, l2c_only_size, CTLFLAG_RD, 226 &ARC_l2c_only.arcs_size.rc_count, 0, "size of mru state"); 227 228 static int 229 sysctl_vfs_zfs_arc_no_grow_shift(SYSCTL_HANDLER_ARGS) 230 { 231 uint32_t val; 232 int err; 233 234 val = arc_no_grow_shift; 235 err = sysctl_handle_32(oidp, &val, 0, req); 236 if (err != 0 || req->newptr == NULL) 237 return (err); 238 239 if (val >= arc_shrink_shift) 240 return (EINVAL); 241 242 arc_no_grow_shift = val; 243 return (0); 244 } 245 246 SYSCTL_PROC(_vfs_zfs, OID_AUTO, arc_no_grow_shift, CTLTYPE_U32 | CTLFLAG_RWTUN, 247 0, sizeof (uint32_t), sysctl_vfs_zfs_arc_no_grow_shift, "U", 248 "log2(fraction of ARC which must be free to allow growing)"); 249 250 int 251 param_set_arc_long(SYSCTL_HANDLER_ARGS) 252 { 253 int err; 254 255 err = sysctl_handle_long(oidp, arg1, 0, req); 256 if (err != 0 || req->newptr == NULL) 257 return (err); 258 259 arc_tuning_update(B_TRUE); 260 261 return (0); 262 } 263 264 int 265 param_set_arc_int(SYSCTL_HANDLER_ARGS) 266 { 267 int err; 268 269 err = sysctl_handle_int(oidp, arg1, 0, req); 270 if (err != 0 || req->newptr == NULL) 271 return (err); 272 273 arc_tuning_update(B_TRUE); 274 275 return (0); 276 } 277 278 SYSCTL_PROC(_vfs_zfs, OID_AUTO, arc_min, CTLTYPE_ULONG | CTLFLAG_RWTUN, 279 &zfs_arc_min, sizeof (zfs_arc_min), param_set_arc_long, "LU", 280 "min arc size (LEGACY)"); 281 SYSCTL_PROC(_vfs_zfs, OID_AUTO, arc_max, CTLTYPE_ULONG | CTLFLAG_RWTUN, 282 &zfs_arc_max, sizeof (zfs_arc_max), param_set_arc_long, "LU", 283 "max arc size (LEGACY)"); 284 285 /* dbuf.c */ 286 287 288 /* dmu.c */ 289 290 /* dmu_zfetch.c */ 291 SYSCTL_NODE(_vfs_zfs, OID_AUTO, zfetch, CTLFLAG_RW, 0, "ZFS ZFETCH (LEGACY)"); 292 293 /* max bytes to prefetch per stream (default 8MB) */ 294 extern uint32_t zfetch_max_distance; 295 SYSCTL_UINT(_vfs_zfs_zfetch, OID_AUTO, max_distance, CTLFLAG_RWTUN, 296 &zfetch_max_distance, 0, "Max bytes to prefetch per stream (LEGACY)"); 297 298 /* max bytes to prefetch indirects for per stream (default 64MB) */ 299 extern uint32_t zfetch_max_idistance; 300 SYSCTL_UINT(_vfs_zfs_prefetch, OID_AUTO, max_idistance, CTLFLAG_RWTUN, 301 &zfetch_max_idistance, 0, "Max bytes to prefetch indirects for per stream"); 302 303 /* dsl_pool.c */ 304 305 /* dnode.c */ 306 extern int zfs_default_bs; 307 SYSCTL_INT(_vfs_zfs, OID_AUTO, default_bs, CTLFLAG_RWTUN, 308 &zfs_default_bs, 0, "Default dnode block shift"); 309 310 extern int zfs_default_ibs; 311 SYSCTL_INT(_vfs_zfs, OID_AUTO, default_ibs, CTLFLAG_RWTUN, 312 &zfs_default_ibs, 0, "Default dnode indirect block shift"); 313 314 315 /* dsl_scan.c */ 316 317 /* metaslab.c */ 318 319 /* 320 * In pools where the log space map feature is not enabled we touch 321 * multiple metaslabs (and their respective space maps) with each 322 * transaction group. Thus, we benefit from having a small space map 323 * block size since it allows us to issue more I/O operations scattered 324 * around the disk. So a sane default for the space map block size 325 * is 8~16K. 326 */ 327 extern int zfs_metaslab_sm_blksz_no_log; 328 SYSCTL_INT(_vfs_zfs_metaslab, OID_AUTO, sm_blksz_no_log, CTLFLAG_RDTUN, 329 &zfs_metaslab_sm_blksz_no_log, 0, 330 "Block size for space map in pools with log space map disabled. " 331 "Power of 2 and greater than 4096."); 332 333 /* 334 * When the log space map feature is enabled, we accumulate a lot of 335 * changes per metaslab that are flushed once in a while so we benefit 336 * from a bigger block size like 128K for the metaslab space maps. 337 */ 338 extern int zfs_metaslab_sm_blksz_with_log; 339 SYSCTL_INT(_vfs_zfs_metaslab, OID_AUTO, sm_blksz_with_log, CTLFLAG_RDTUN, 340 &zfs_metaslab_sm_blksz_with_log, 0, 341 "Block size for space map in pools with log space map enabled. " 342 "Power of 2 and greater than 4096."); 343 344 /* 345 * The in-core space map representation is more compact than its on-disk form. 346 * The zfs_condense_pct determines how much more compact the in-core 347 * space map representation must be before we compact it on-disk. 348 * Values should be greater than or equal to 100. 349 */ 350 extern int zfs_condense_pct; 351 SYSCTL_INT(_vfs_zfs, OID_AUTO, condense_pct, CTLFLAG_RWTUN, 352 &zfs_condense_pct, 0, 353 "Condense on-disk spacemap when it is more than this many percents" 354 " of in-memory counterpart"); 355 356 extern int zfs_remove_max_segment; 357 SYSCTL_INT(_vfs_zfs, OID_AUTO, remove_max_segment, CTLFLAG_RWTUN, 358 &zfs_remove_max_segment, 0, "Largest contiguous segment ZFS will attempt to" 359 " allocate when removing a device"); 360 361 extern int zfs_removal_suspend_progress; 362 SYSCTL_INT(_vfs_zfs, OID_AUTO, removal_suspend_progress, CTLFLAG_RWTUN, 363 &zfs_removal_suspend_progress, 0, "Ensures certain actions can happen while" 364 " in the middle of a removal"); 365 366 367 /* 368 * Minimum size which forces the dynamic allocator to change 369 * it's allocation strategy. Once the space map cannot satisfy 370 * an allocation of this size then it switches to using more 371 * aggressive strategy (i.e search by size rather than offset). 372 */ 373 extern uint64_t metaslab_df_alloc_threshold; 374 SYSCTL_QUAD(_vfs_zfs_metaslab, OID_AUTO, df_alloc_threshold, CTLFLAG_RWTUN, 375 &metaslab_df_alloc_threshold, 0, 376 "Minimum size which forces the dynamic allocator to change it's allocation strategy"); 377 378 /* 379 * The minimum free space, in percent, which must be available 380 * in a space map to continue allocations in a first-fit fashion. 381 * Once the space map's free space drops below this level we dynamically 382 * switch to using best-fit allocations. 383 */ 384 extern int metaslab_df_free_pct; 385 SYSCTL_INT(_vfs_zfs_metaslab, OID_AUTO, df_free_pct, CTLFLAG_RWTUN, 386 &metaslab_df_free_pct, 0, 387 "The minimum free space, in percent, which must be available in a " 388 "space map to continue allocations in a first-fit fashion"); 389 390 /* 391 * Percentage of all cpus that can be used by the metaslab taskq. 392 */ 393 extern int metaslab_load_pct; 394 SYSCTL_INT(_vfs_zfs_metaslab, OID_AUTO, load_pct, CTLFLAG_RWTUN, 395 &metaslab_load_pct, 0, 396 "Percentage of cpus that can be used by the metaslab taskq"); 397 398 /* 399 * Max number of metaslabs per group to preload. 400 */ 401 extern int metaslab_preload_limit; 402 SYSCTL_INT(_vfs_zfs_metaslab, OID_AUTO, preload_limit, CTLFLAG_RWTUN, 403 &metaslab_preload_limit, 0, 404 "Max number of metaslabs per group to preload"); 405 406 /* refcount.c */ 407 extern int reference_tracking_enable; 408 SYSCTL_INT(_vfs_zfs, OID_AUTO, reference_tracking_enable, CTLFLAG_RDTUN, 409 &reference_tracking_enable, 0, 410 "Track reference holders to refcount_t objects, used mostly by ZFS"); 411 412 /* spa.c */ 413 extern int zfs_ccw_retry_interval; 414 SYSCTL_INT(_vfs_zfs, OID_AUTO, ccw_retry_interval, CTLFLAG_RWTUN, 415 &zfs_ccw_retry_interval, 0, 416 "Configuration cache file write, retry after failure, interval (seconds)"); 417 418 extern uint64_t zfs_max_missing_tvds_cachefile; 419 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, max_missing_tvds_cachefile, CTLFLAG_RWTUN, 420 &zfs_max_missing_tvds_cachefile, 0, 421 "allow importing pools with missing top-level vdevs in cache file"); 422 423 extern uint64_t zfs_max_missing_tvds_scan; 424 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, max_missing_tvds_scan, CTLFLAG_RWTUN, 425 &zfs_max_missing_tvds_scan, 0, 426 "allow importing pools with missing top-level vdevs during scan"); 427 428 /* spa_misc.c */ 429 extern int zfs_flags; 430 static int 431 sysctl_vfs_zfs_debug_flags(SYSCTL_HANDLER_ARGS) 432 { 433 int err, val; 434 435 val = zfs_flags; 436 err = sysctl_handle_int(oidp, &val, 0, req); 437 if (err != 0 || req->newptr == NULL) 438 return (err); 439 440 /* 441 * ZFS_DEBUG_MODIFY must be enabled prior to boot so all 442 * arc buffers in the system have the necessary additional 443 * checksum data. However, it is safe to disable at any 444 * time. 445 */ 446 if (!(zfs_flags & ZFS_DEBUG_MODIFY)) 447 val &= ~ZFS_DEBUG_MODIFY; 448 zfs_flags = val; 449 450 return (0); 451 } 452 453 SYSCTL_PROC(_vfs_zfs, OID_AUTO, debugflags, 454 CTLTYPE_UINT | CTLFLAG_MPSAFE | CTLFLAG_RWTUN, NULL, 0, 455 sysctl_vfs_zfs_debug_flags, "IU", "Debug flags for ZFS testing."); 456 457 int 458 param_set_deadman_synctime(SYSCTL_HANDLER_ARGS) 459 { 460 unsigned long val; 461 int err; 462 463 val = zfs_deadman_synctime_ms; 464 err = sysctl_handle_long(oidp, &val, 0, req); 465 if (err != 0 || req->newptr == NULL) 466 return (err); 467 zfs_deadman_synctime_ms = val; 468 469 spa_set_deadman_synctime(MSEC2NSEC(zfs_deadman_synctime_ms)); 470 471 return (0); 472 } 473 474 int 475 param_set_deadman_ziotime(SYSCTL_HANDLER_ARGS) 476 { 477 unsigned long val; 478 int err; 479 480 val = zfs_deadman_ziotime_ms; 481 err = sysctl_handle_long(oidp, &val, 0, req); 482 if (err != 0 || req->newptr == NULL) 483 return (err); 484 zfs_deadman_ziotime_ms = val; 485 486 spa_set_deadman_ziotime(MSEC2NSEC(zfs_deadman_synctime_ms)); 487 488 return (0); 489 } 490 491 int 492 param_set_deadman_failmode(SYSCTL_HANDLER_ARGS) 493 { 494 char buf[16]; 495 int rc; 496 497 if (req->newptr == NULL) 498 strlcpy(buf, zfs_deadman_failmode, sizeof (buf)); 499 500 rc = sysctl_handle_string(oidp, buf, sizeof (buf), req); 501 if (rc || req->newptr == NULL) 502 return (rc); 503 if (strcmp(buf, zfs_deadman_failmode) == 0) 504 return (0); 505 if (!strcmp(buf, "wait")) 506 zfs_deadman_failmode = "wait"; 507 if (!strcmp(buf, "continue")) 508 zfs_deadman_failmode = "continue"; 509 if (!strcmp(buf, "panic")) 510 zfs_deadman_failmode = "panic"; 511 512 return (-param_set_deadman_failmode_common(buf)); 513 } 514 515 516 /* spacemap.c */ 517 extern int space_map_ibs; 518 SYSCTL_INT(_vfs_zfs, OID_AUTO, space_map_ibs, CTLFLAG_RWTUN, 519 &space_map_ibs, 0, "Space map indirect block shift"); 520 521 522 /* vdev.c */ 523 int 524 param_set_min_auto_ashift(SYSCTL_HANDLER_ARGS) 525 { 526 uint64_t val; 527 int err; 528 529 val = zfs_vdev_min_auto_ashift; 530 err = sysctl_handle_64(oidp, &val, 0, req); 531 if (err != 0 || req->newptr == NULL) 532 return (SET_ERROR(err)); 533 534 if (val < ASHIFT_MIN || val > zfs_vdev_max_auto_ashift) 535 return (SET_ERROR(EINVAL)); 536 537 zfs_vdev_min_auto_ashift = val; 538 539 return (0); 540 } 541 542 int 543 param_set_max_auto_ashift(SYSCTL_HANDLER_ARGS) 544 { 545 uint64_t val; 546 int err; 547 548 val = zfs_vdev_max_auto_ashift; 549 err = sysctl_handle_64(oidp, &val, 0, req); 550 if (err != 0 || req->newptr == NULL) 551 return (SET_ERROR(err)); 552 553 if (val > ASHIFT_MAX || val < zfs_vdev_min_auto_ashift) 554 return (SET_ERROR(EINVAL)); 555 556 zfs_vdev_max_auto_ashift = val; 557 558 return (0); 559 } 560 561 SYSCTL_PROC(_vfs_zfs, OID_AUTO, min_auto_ashift, CTLTYPE_U64 | CTLFLAG_RWTUN, 562 &zfs_vdev_min_auto_ashift, sizeof (zfs_vdev_min_auto_ashift), 563 param_set_min_auto_ashift, "QU", 564 "Min ashift used when creating new top-level vdev. (LEGACY)"); 565 SYSCTL_PROC(_vfs_zfs, OID_AUTO, max_auto_ashift, CTLTYPE_U64 | CTLFLAG_RWTUN, 566 &zfs_vdev_max_auto_ashift, sizeof (zfs_vdev_max_auto_ashift), 567 param_set_max_auto_ashift, "QU", 568 "Max ashift used when optimizing for logical -> physical sector size on " 569 "new top-level vdevs. (LEGACY)"); 570 571 /* 572 * Since the DTL space map of a vdev is not expected to have a lot of 573 * entries, we default its block size to 4K. 574 */ 575 extern int zfs_vdev_dtl_sm_blksz; 576 SYSCTL_INT(_vfs_zfs, OID_AUTO, dtl_sm_blksz, CTLFLAG_RDTUN, 577 &zfs_vdev_dtl_sm_blksz, 0, 578 "Block size for DTL space map. Power of 2 and greater than 4096."); 579 580 /* 581 * vdev-wide space maps that have lots of entries written to them at 582 * the end of each transaction can benefit from a higher I/O bandwidth 583 * (e.g. vdev_obsolete_sm), thus we default their block size to 128K. 584 */ 585 extern int zfs_vdev_standard_sm_blksz; 586 SYSCTL_INT(_vfs_zfs, OID_AUTO, standard_sm_blksz, CTLFLAG_RDTUN, 587 &zfs_vdev_standard_sm_blksz, 0, 588 "Block size for standard space map. Power of 2 and greater than 4096."); 589 590 extern int vdev_validate_skip; 591 SYSCTL_INT(_vfs_zfs, OID_AUTO, validate_skip, CTLFLAG_RDTUN, 592 &vdev_validate_skip, 0, 593 "Enable to bypass vdev_validate()."); 594 595 596 /* vdev_cache.c */ 597 598 /* vdev_mirror.c */ 599 /* 600 * The load configuration settings below are tuned by default for 601 * the case where all devices are of the same rotational type. 602 * 603 * If there is a mixture of rotating and non-rotating media, setting 604 * non_rotating_seek_inc to 0 may well provide better results as it 605 * will direct more reads to the non-rotating vdevs which are more 606 * likely to have a higher performance. 607 */ 608 609 610 /* vdev_queue.c */ 611 #define ZFS_VDEV_QUEUE_KNOB_MIN(name) \ 612 extern uint32_t zfs_vdev_ ## name ## _min_active; \ 613 SYSCTL_UINT(_vfs_zfs_vdev, OID_AUTO, name ## _min_active, CTLFLAG_RWTUN,\ 614 &zfs_vdev_ ## name ## _min_active, 0, \ 615 "Initial number of I/O requests of type " #name \ 616 " active for each device"); 617 618 #define ZFS_VDEV_QUEUE_KNOB_MAX(name) \ 619 extern uint32_t zfs_vdev_ ## name ## _max_active; \ 620 SYSCTL_UINT(_vfs_zfs_vdev, OID_AUTO, name ## _max_active, CTLFLAG_RWTUN, \ 621 &zfs_vdev_ ## name ## _max_active, 0, \ 622 "Maximum number of I/O requests of type " #name \ 623 " active for each device"); 624 625 626 #undef ZFS_VDEV_QUEUE_KNOB 627 628 extern uint32_t zfs_vdev_max_active; 629 SYSCTL_UINT(_vfs_zfs, OID_AUTO, top_maxinflight, CTLFLAG_RWTUN, 630 &zfs_vdev_max_active, 0, 631 "The maximum number of I/Os of all types active for each device. (LEGACY)"); 632 633 extern int zfs_vdev_def_queue_depth; 634 SYSCTL_INT(_vfs_zfs_vdev, OID_AUTO, def_queue_depth, CTLFLAG_RWTUN, 635 &zfs_vdev_def_queue_depth, 0, 636 "Default queue depth for each allocator"); 637 638 /*extern uint64_t zfs_multihost_history; 639 SYSCTL_UQUAD(_vfs_zfs, OID_AUTO, multihost_history, CTLFLAG_RWTUN, 640 &zfs_multihost_history, 0, 641 "Historical staticists for the last N multihost updates");*/ 642 643 #ifdef notyet 644 SYSCTL_INT(_vfs_zfs_vdev, OID_AUTO, trim_on_init, CTLFLAG_RW, 645 &vdev_trim_on_init, 0, "Enable/disable full vdev trim on initialisation"); 646 #endif 647 648 649 /* zio.c */ 650 #if defined(__LP64__) 651 int zio_use_uma = 1; 652 #else 653 int zio_use_uma = 0; 654 #endif 655 656 SYSCTL_INT(_vfs_zfs_zio, OID_AUTO, use_uma, CTLFLAG_RDTUN, &zio_use_uma, 0, 657 "Use uma(9) for ZIO allocations"); 658 SYSCTL_INT(_vfs_zfs_zio, OID_AUTO, exclude_metadata, CTLFLAG_RDTUN, &zio_exclude_metadata, 0, 659 "Exclude metadata buffers from dumps as well"); 660 661 int 662 param_set_slop_shift(SYSCTL_HANDLER_ARGS) 663 { 664 int val; 665 int err; 666 667 val = *(int *)arg1; 668 669 err = sysctl_handle_int(oidp, &val, 0, req); 670 if (err != 0 || req->newptr == NULL) 671 return (err); 672 673 if (val < 1 || val > 31) 674 return (EINVAL); 675 676 *(int *)arg1 = val; 677 678 return (0); 679 } 680 681 int 682 param_set_multihost_interval(SYSCTL_HANDLER_ARGS) 683 { 684 int err; 685 686 err = sysctl_handle_long(oidp, arg1, 0, req); 687 if (err != 0 || req->newptr == NULL) 688 return (err); 689 690 if (spa_mode_global != SPA_MODE_UNINIT) 691 mmp_signal_all_threads(); 692 693 return (0); 694 } 695