| 1 | /* |
| 2 | * Copyright (c) 2007-2008 The DragonFly Project. All rights reserved. |
| 3 | * |
| 4 | * This code is derived from software contributed to The DragonFly Project |
| 5 | * by Matthew Dillon <dillon@backplane.com> |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in |
| 15 | * the documentation and/or other materials provided with the |
| 16 | * distribution. |
| 17 | * 3. Neither the name of The DragonFly Project nor the names of its |
| 18 | * contributors may be used to endorse or promote products derived |
| 19 | * from this software without specific, prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 22 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 23 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 24 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 25 | * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 26 | * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 27 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 28 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 29 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 30 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 31 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 32 | * SUCH DAMAGE. |
| 33 | */ |
| 34 | |
| 35 | #include <sys/nlookup.h> |
| 36 | #include <sys/fcntl.h> |
| 37 | #include <sys/sysctl.h> |
| 38 | |
| 39 | #include "hammer.h" |
| 40 | |
| 41 | /* |
| 42 | * NOTE! Global statistics may not be MPSAFE so HAMMER never uses them |
| 43 | * in conditionals. |
| 44 | */ |
| 45 | int hammer_supported_version = HAMMER_VOL_VERSION_DEFAULT; |
| 46 | int hammer_debug_io; |
| 47 | int hammer_debug_general; |
| 48 | int hammer_debug_debug = 1; /* medium-error panics */ |
| 49 | int hammer_debug_inode; |
| 50 | int hammer_debug_locks; |
| 51 | int hammer_debug_btree; |
| 52 | int hammer_debug_tid; |
| 53 | int hammer_debug_recover; /* -1 will disable, +1 will force */ |
| 54 | int hammer_debug_recover_faults; |
| 55 | int hammer_debug_critical; /* non-zero enter debugger on error */ |
| 56 | int hammer_cluster_enable = 1; /* enable read clustering by default */ |
| 57 | int hammer_live_dedup = 0; |
| 58 | int hammer_tdmux_ticks; |
| 59 | int hammer_count_fsyncs; |
| 60 | int hammer_count_inodes; |
| 61 | int hammer_count_iqueued; |
| 62 | int hammer_count_reclaims; |
| 63 | int hammer_count_records; |
| 64 | int hammer_count_record_datas; |
| 65 | int hammer_count_volumes; |
| 66 | int hammer_count_buffers; |
| 67 | int hammer_count_nodes; |
| 68 | int64_t hammer_count_extra_space_used; |
| 69 | int64_t hammer_stats_btree_lookups; |
| 70 | int64_t hammer_stats_btree_searches; |
| 71 | int64_t hammer_stats_btree_inserts; |
| 72 | int64_t hammer_stats_btree_deletes; |
| 73 | int64_t hammer_stats_btree_elements; |
| 74 | int64_t hammer_stats_btree_splits; |
| 75 | int64_t hammer_stats_btree_iterations; |
| 76 | int64_t hammer_stats_btree_root_iterations; |
| 77 | int64_t hammer_stats_record_iterations; |
| 78 | |
| 79 | int64_t hammer_stats_file_read; |
| 80 | int64_t hammer_stats_file_write; |
| 81 | int64_t hammer_stats_file_iopsr; |
| 82 | int64_t hammer_stats_file_iopsw; |
| 83 | int64_t hammer_stats_disk_read; |
| 84 | int64_t hammer_stats_disk_write; |
| 85 | int64_t hammer_stats_inode_flushes; |
| 86 | int64_t hammer_stats_commits; |
| 87 | int64_t hammer_stats_undo; |
| 88 | int64_t hammer_stats_redo; |
| 89 | |
| 90 | long hammer_count_dirtybufspace; /* global */ |
| 91 | int hammer_count_refedbufs; /* global */ |
| 92 | int hammer_count_reservations; |
| 93 | long hammer_count_io_running_read; |
| 94 | long hammer_count_io_running_write; |
| 95 | int hammer_count_io_locked; |
| 96 | long hammer_limit_dirtybufspace; /* per-mount */ |
| 97 | int hammer_limit_recs; /* as a whole XXX */ |
| 98 | int hammer_limit_inode_recs = 2048; /* per inode */ |
| 99 | int hammer_limit_reclaims; |
| 100 | int hammer_live_dedup_cache_size = DEDUP_CACHE_SIZE; |
| 101 | int hammer_limit_redo = 4096 * 1024; /* per inode */ |
| 102 | int hammer_autoflush = 500; /* auto flush (typ on reclaim) */ |
| 103 | int hammer_bio_count; |
| 104 | int hammer_verify_zone; |
| 105 | int hammer_verify_data = 1; |
| 106 | int hammer_write_mode; |
| 107 | int hammer_double_buffer; |
| 108 | int hammer_btree_full_undo = 1; |
| 109 | int hammer_yield_check = 16; |
| 110 | int hammer_fsync_mode = 3; |
| 111 | int64_t hammer_contention_count; |
| 112 | int64_t hammer_zone_limit; |
| 113 | |
| 114 | /* |
| 115 | * Live dedup debug counters (sysctls are writable so that counters |
| 116 | * can be reset from userspace). |
| 117 | */ |
| 118 | int64_t hammer_live_dedup_vnode_bcmps = 0; |
| 119 | int64_t hammer_live_dedup_device_bcmps = 0; |
| 120 | int64_t hammer_live_dedup_findblk_failures = 0; |
| 121 | int64_t hammer_live_dedup_bmap_saves = 0; |
| 122 | |
| 123 | |
| 124 | SYSCTL_NODE(_vfs, OID_AUTO, hammer, CTLFLAG_RW, 0, "HAMMER filesystem"); |
| 125 | |
| 126 | SYSCTL_INT(_vfs_hammer, OID_AUTO, supported_version, CTLFLAG_RD, |
| 127 | &hammer_supported_version, 0, ""); |
| 128 | SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_general, CTLFLAG_RW, |
| 129 | &hammer_debug_general, 0, ""); |
| 130 | SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_io, CTLFLAG_RW, |
| 131 | &hammer_debug_io, 0, ""); |
| 132 | SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_debug, CTLFLAG_RW, |
| 133 | &hammer_debug_debug, 0, ""); |
| 134 | SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_inode, CTLFLAG_RW, |
| 135 | &hammer_debug_inode, 0, ""); |
| 136 | SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_locks, CTLFLAG_RW, |
| 137 | &hammer_debug_locks, 0, ""); |
| 138 | SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_btree, CTLFLAG_RW, |
| 139 | &hammer_debug_btree, 0, ""); |
| 140 | SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_tid, CTLFLAG_RW, |
| 141 | &hammer_debug_tid, 0, ""); |
| 142 | SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_recover, CTLFLAG_RW, |
| 143 | &hammer_debug_recover, 0, ""); |
| 144 | SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_recover_faults, CTLFLAG_RW, |
| 145 | &hammer_debug_recover_faults, 0, ""); |
| 146 | SYSCTL_INT(_vfs_hammer, OID_AUTO, debug_critical, CTLFLAG_RW, |
| 147 | &hammer_debug_critical, 0, ""); |
| 148 | SYSCTL_INT(_vfs_hammer, OID_AUTO, cluster_enable, CTLFLAG_RW, |
| 149 | &hammer_cluster_enable, 0, ""); |
| 150 | /* |
| 151 | * 0 - live dedup is disabled |
| 152 | * 1 - dedup cache is populated on reads only |
| 153 | * 2 - dedup cache is populated on both reads and writes |
| 154 | * |
| 155 | * LIVE_DEDUP IS DISABLED PERMANENTLY! This feature appears to cause |
| 156 | * blockmap corruption over time so we've turned it off permanently. |
| 157 | */ |
| 158 | SYSCTL_INT(_vfs_hammer, OID_AUTO, live_dedup, CTLFLAG_RD, |
| 159 | &hammer_live_dedup, 0, "Enable live dedup (experimental)"); |
| 160 | SYSCTL_INT(_vfs_hammer, OID_AUTO, tdmux_ticks, CTLFLAG_RW, |
| 161 | &hammer_tdmux_ticks, 0, "Hammer tdmux ticks"); |
| 162 | |
| 163 | SYSCTL_LONG(_vfs_hammer, OID_AUTO, limit_dirtybufspace, CTLFLAG_RW, |
| 164 | &hammer_limit_dirtybufspace, 0, ""); |
| 165 | SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_recs, CTLFLAG_RW, |
| 166 | &hammer_limit_recs, 0, ""); |
| 167 | SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_inode_recs, CTLFLAG_RW, |
| 168 | &hammer_limit_inode_recs, 0, ""); |
| 169 | SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_reclaims, CTLFLAG_RW, |
| 170 | &hammer_limit_reclaims, 0, ""); |
| 171 | SYSCTL_INT(_vfs_hammer, OID_AUTO, live_dedup_cache_size, CTLFLAG_RW, |
| 172 | &hammer_live_dedup_cache_size, 0, |
| 173 | "Number of cache entries"); |
| 174 | SYSCTL_INT(_vfs_hammer, OID_AUTO, limit_redo, CTLFLAG_RW, |
| 175 | &hammer_limit_redo, 0, ""); |
| 176 | |
| 177 | SYSCTL_INT(_vfs_hammer, OID_AUTO, count_fsyncs, CTLFLAG_RD, |
| 178 | &hammer_count_fsyncs, 0, ""); |
| 179 | SYSCTL_INT(_vfs_hammer, OID_AUTO, count_inodes, CTLFLAG_RD, |
| 180 | &hammer_count_inodes, 0, ""); |
| 181 | SYSCTL_INT(_vfs_hammer, OID_AUTO, count_iqueued, CTLFLAG_RD, |
| 182 | &hammer_count_iqueued, 0, ""); |
| 183 | SYSCTL_INT(_vfs_hammer, OID_AUTO, count_reclaims, CTLFLAG_RD, |
| 184 | &hammer_count_reclaims, 0, ""); |
| 185 | SYSCTL_INT(_vfs_hammer, OID_AUTO, count_records, CTLFLAG_RD, |
| 186 | &hammer_count_records, 0, ""); |
| 187 | SYSCTL_INT(_vfs_hammer, OID_AUTO, count_record_datas, CTLFLAG_RD, |
| 188 | &hammer_count_record_datas, 0, ""); |
| 189 | SYSCTL_INT(_vfs_hammer, OID_AUTO, count_volumes, CTLFLAG_RD, |
| 190 | &hammer_count_volumes, 0, ""); |
| 191 | SYSCTL_INT(_vfs_hammer, OID_AUTO, count_buffers, CTLFLAG_RD, |
| 192 | &hammer_count_buffers, 0, ""); |
| 193 | SYSCTL_INT(_vfs_hammer, OID_AUTO, count_nodes, CTLFLAG_RD, |
| 194 | &hammer_count_nodes, 0, ""); |
| 195 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, count_extra_space_used, CTLFLAG_RD, |
| 196 | &hammer_count_extra_space_used, 0, ""); |
| 197 | |
| 198 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_searches, CTLFLAG_RD, |
| 199 | &hammer_stats_btree_searches, 0, ""); |
| 200 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_lookups, CTLFLAG_RD, |
| 201 | &hammer_stats_btree_lookups, 0, ""); |
| 202 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_inserts, CTLFLAG_RD, |
| 203 | &hammer_stats_btree_inserts, 0, ""); |
| 204 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_deletes, CTLFLAG_RD, |
| 205 | &hammer_stats_btree_deletes, 0, ""); |
| 206 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_elements, CTLFLAG_RD, |
| 207 | &hammer_stats_btree_elements, 0, ""); |
| 208 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_splits, CTLFLAG_RD, |
| 209 | &hammer_stats_btree_splits, 0, ""); |
| 210 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_iterations, CTLFLAG_RD, |
| 211 | &hammer_stats_btree_iterations, 0, ""); |
| 212 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_btree_root_iterations, CTLFLAG_RD, |
| 213 | &hammer_stats_btree_root_iterations, 0, ""); |
| 214 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_record_iterations, CTLFLAG_RD, |
| 215 | &hammer_stats_record_iterations, 0, ""); |
| 216 | |
| 217 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_read, CTLFLAG_RD, |
| 218 | &hammer_stats_file_read, 0, ""); |
| 219 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_write, CTLFLAG_RD, |
| 220 | &hammer_stats_file_write, 0, ""); |
| 221 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_iopsr, CTLFLAG_RD, |
| 222 | &hammer_stats_file_iopsr, 0, ""); |
| 223 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_file_iopsw, CTLFLAG_RD, |
| 224 | &hammer_stats_file_iopsw, 0, ""); |
| 225 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_disk_read, CTLFLAG_RD, |
| 226 | &hammer_stats_disk_read, 0, ""); |
| 227 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_disk_write, CTLFLAG_RD, |
| 228 | &hammer_stats_disk_write, 0, ""); |
| 229 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_inode_flushes, CTLFLAG_RD, |
| 230 | &hammer_stats_inode_flushes, 0, ""); |
| 231 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_commits, CTLFLAG_RD, |
| 232 | &hammer_stats_commits, 0, ""); |
| 233 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_undo, CTLFLAG_RD, |
| 234 | &hammer_stats_undo, 0, ""); |
| 235 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, stats_redo, CTLFLAG_RD, |
| 236 | &hammer_stats_redo, 0, ""); |
| 237 | |
| 238 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, live_dedup_vnode_bcmps, CTLFLAG_RW, |
| 239 | &hammer_live_dedup_vnode_bcmps, 0, |
| 240 | "successful vnode buffer comparisons"); |
| 241 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, live_dedup_device_bcmps, CTLFLAG_RW, |
| 242 | &hammer_live_dedup_device_bcmps, 0, |
| 243 | "successful device buffer comparisons"); |
| 244 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, live_dedup_findblk_failures, CTLFLAG_RW, |
| 245 | &hammer_live_dedup_findblk_failures, 0, |
| 246 | "block lookup failures for comparison"); |
| 247 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, live_dedup_bmap_saves, CTLFLAG_RW, |
| 248 | &hammer_live_dedup_bmap_saves, 0, |
| 249 | "useful physical block lookups"); |
| 250 | |
| 251 | SYSCTL_LONG(_vfs_hammer, OID_AUTO, count_dirtybufspace, CTLFLAG_RD, |
| 252 | &hammer_count_dirtybufspace, 0, ""); |
| 253 | SYSCTL_INT(_vfs_hammer, OID_AUTO, count_refedbufs, CTLFLAG_RD, |
| 254 | &hammer_count_refedbufs, 0, ""); |
| 255 | SYSCTL_INT(_vfs_hammer, OID_AUTO, count_reservations, CTLFLAG_RD, |
| 256 | &hammer_count_reservations, 0, ""); |
| 257 | SYSCTL_LONG(_vfs_hammer, OID_AUTO, count_io_running_read, CTLFLAG_RD, |
| 258 | &hammer_count_io_running_read, 0, ""); |
| 259 | SYSCTL_INT(_vfs_hammer, OID_AUTO, count_io_locked, CTLFLAG_RD, |
| 260 | &hammer_count_io_locked, 0, ""); |
| 261 | SYSCTL_LONG(_vfs_hammer, OID_AUTO, count_io_running_write, CTLFLAG_RD, |
| 262 | &hammer_count_io_running_write, 0, ""); |
| 263 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, zone_limit, CTLFLAG_RW, |
| 264 | &hammer_zone_limit, 0, ""); |
| 265 | SYSCTL_QUAD(_vfs_hammer, OID_AUTO, contention_count, CTLFLAG_RW, |
| 266 | &hammer_contention_count, 0, ""); |
| 267 | SYSCTL_INT(_vfs_hammer, OID_AUTO, autoflush, CTLFLAG_RW, |
| 268 | &hammer_autoflush, 0, ""); |
| 269 | SYSCTL_INT(_vfs_hammer, OID_AUTO, verify_zone, CTLFLAG_RW, |
| 270 | &hammer_verify_zone, 0, ""); |
| 271 | SYSCTL_INT(_vfs_hammer, OID_AUTO, verify_data, CTLFLAG_RW, |
| 272 | &hammer_verify_data, 0, ""); |
| 273 | SYSCTL_INT(_vfs_hammer, OID_AUTO, write_mode, CTLFLAG_RW, |
| 274 | &hammer_write_mode, 0, ""); |
| 275 | SYSCTL_INT(_vfs_hammer, OID_AUTO, double_buffer, CTLFLAG_RW, |
| 276 | &hammer_double_buffer, 0, ""); |
| 277 | SYSCTL_INT(_vfs_hammer, OID_AUTO, btree_full_undo, CTLFLAG_RW, |
| 278 | &hammer_btree_full_undo, 0, ""); |
| 279 | SYSCTL_INT(_vfs_hammer, OID_AUTO, yield_check, CTLFLAG_RW, |
| 280 | &hammer_yield_check, 0, ""); |
| 281 | SYSCTL_INT(_vfs_hammer, OID_AUTO, fsync_mode, CTLFLAG_RW, |
| 282 | &hammer_fsync_mode, 0, ""); |
| 283 | |
| 284 | /* KTR_INFO_MASTER(hammer); */ |
| 285 | |
| 286 | /* |
| 287 | * VFS ABI |
| 288 | */ |
| 289 | static void hammer_free_hmp(struct mount *mp); |
| 290 | |
| 291 | static int hammer_vfs_mount(struct mount *mp, char *path, caddr_t data, |
| 292 | struct ucred *cred); |
| 293 | static int hammer_vfs_unmount(struct mount *mp, int mntflags); |
| 294 | static int hammer_vfs_root(struct mount *mp, struct vnode **vpp); |
| 295 | static int hammer_vfs_statfs(struct mount *mp, struct statfs *sbp, |
| 296 | struct ucred *cred); |
| 297 | static int hammer_vfs_statvfs(struct mount *mp, struct statvfs *sbp, |
| 298 | struct ucred *cred); |
| 299 | static int hammer_vfs_sync(struct mount *mp, int waitfor); |
| 300 | static int hammer_vfs_vget(struct mount *mp, struct vnode *dvp, |
| 301 | ino_t ino, struct vnode **vpp); |
| 302 | static int hammer_vfs_init(struct vfsconf *conf); |
| 303 | static int hammer_vfs_fhtovp(struct mount *mp, struct vnode *rootvp, |
| 304 | struct fid *fhp, struct vnode **vpp); |
| 305 | static int hammer_vfs_vptofh(struct vnode *vp, struct fid *fhp); |
| 306 | static int hammer_vfs_checkexp(struct mount *mp, struct sockaddr *nam, |
| 307 | int *exflagsp, struct ucred **credanonp); |
| 308 | |
| 309 | |
| 310 | static struct vfsops hammer_vfsops = { |
| 311 | .vfs_mount = hammer_vfs_mount, |
| 312 | .vfs_unmount = hammer_vfs_unmount, |
| 313 | .vfs_root = hammer_vfs_root, |
| 314 | .vfs_statfs = hammer_vfs_statfs, |
| 315 | .vfs_statvfs = hammer_vfs_statvfs, |
| 316 | .vfs_sync = hammer_vfs_sync, |
| 317 | .vfs_vget = hammer_vfs_vget, |
| 318 | .vfs_init = hammer_vfs_init, |
| 319 | .vfs_vptofh = hammer_vfs_vptofh, |
| 320 | .vfs_fhtovp = hammer_vfs_fhtovp, |
| 321 | .vfs_checkexp = hammer_vfs_checkexp |
| 322 | }; |
| 323 | |
| 324 | MALLOC_DEFINE(M_HAMMER, "HAMMER-mount", ""); |
| 325 | |
| 326 | VFS_SET(hammer_vfsops, hammer, 0); |
| 327 | MODULE_VERSION(hammer, 1); |
| 328 | |
| 329 | static int |
| 330 | hammer_vfs_init(struct vfsconf *conf) |
| 331 | { |
| 332 | long n; |
| 333 | |
| 334 | /* |
| 335 | * Wait up to this long for an exclusive deadlock to clear |
| 336 | * before acquiring a new shared lock on the ip. The deadlock |
| 337 | * may have occured on a b-tree node related to the ip. |
| 338 | */ |
| 339 | if (hammer_tdmux_ticks == 0) |
| 340 | hammer_tdmux_ticks = hz / 5; |
| 341 | |
| 342 | /* |
| 343 | * Autosize, but be careful because a hammer filesystem's |
| 344 | * reserve is partially calculated based on dirtybufspace, |
| 345 | * so we simply cannot allow it to get too large. |
| 346 | */ |
| 347 | if (hammer_limit_recs == 0) { |
| 348 | n = nbuf * 25; |
| 349 | if (n > kmalloc_limit(M_HAMMER) / 512) |
| 350 | n = kmalloc_limit(M_HAMMER) / 512; |
| 351 | if (n > 2 * 1024 * 1024) |
| 352 | n = 2 * 1024 * 1024; |
| 353 | hammer_limit_recs = (int)n; |
| 354 | } |
| 355 | if (hammer_limit_dirtybufspace == 0) { |
| 356 | hammer_limit_dirtybufspace = hidirtybufspace / 2; |
| 357 | if (hammer_limit_dirtybufspace < 1L * 1024 * 1024) |
| 358 | hammer_limit_dirtybufspace = 1024L * 1024; |
| 359 | if (hammer_limit_dirtybufspace > 1024L * 1024 * 1024) |
| 360 | hammer_limit_dirtybufspace = 1024L * 1024 * 1024; |
| 361 | } |
| 362 | |
| 363 | /* |
| 364 | * The hammer_inode structure detaches from the vnode on reclaim. |
| 365 | * This limits the number of inodes in this state to prevent a |
| 366 | * memory pool blowout. |
| 367 | */ |
| 368 | if (hammer_limit_reclaims == 0) |
| 369 | hammer_limit_reclaims = desiredvnodes / 10; |
| 370 | |
| 371 | return(0); |
| 372 | } |
| 373 | |
| 374 | static int |
| 375 | hammer_vfs_mount(struct mount *mp, char *mntpt, caddr_t data, |
| 376 | struct ucred *cred) |
| 377 | { |
| 378 | struct hammer_mount_info info; |
| 379 | hammer_mount_t hmp; |
| 380 | hammer_volume_t rootvol; |
| 381 | struct vnode *rootvp; |
| 382 | struct vnode *devvp = NULL; |
| 383 | const char *upath; /* volume name in userspace */ |
| 384 | char *path; /* volume name in system space */ |
| 385 | int error; |
| 386 | int i; |
| 387 | int master_id; |
| 388 | int nvolumes; |
| 389 | char *next_volume_ptr = NULL; |
| 390 | |
| 391 | /* |
| 392 | * Accept hammer_mount_info. mntpt is NULL for root mounts at boot. |
| 393 | */ |
| 394 | if (mntpt == NULL) { |
| 395 | bzero(&info, sizeof(info)); |
| 396 | info.asof = 0; |
| 397 | info.hflags = 0; |
| 398 | info.nvolumes = 1; |
| 399 | |
| 400 | next_volume_ptr = mp->mnt_stat.f_mntfromname; |
| 401 | |
| 402 | /* Count number of volumes separated by ':' */ |
| 403 | for (char *p = next_volume_ptr; *p != '\0'; ++p) { |
| 404 | if (*p == ':') { |
| 405 | ++info.nvolumes; |
| 406 | } |
| 407 | } |
| 408 | |
| 409 | mp->mnt_flag &= ~MNT_RDONLY; /* mount R/W */ |
| 410 | } else { |
| 411 | if ((error = copyin(data, &info, sizeof(info))) != 0) |
| 412 | return (error); |
| 413 | } |
| 414 | |
| 415 | /* |
| 416 | * updating or new mount |
| 417 | */ |
| 418 | if (mp->mnt_flag & MNT_UPDATE) { |
| 419 | hmp = (void *)mp->mnt_data; |
| 420 | KKASSERT(hmp != NULL); |
| 421 | } else { |
| 422 | if (info.nvolumes <= 0 || info.nvolumes > HAMMER_MAX_VOLUMES) |
| 423 | return (EINVAL); |
| 424 | hmp = NULL; |
| 425 | } |
| 426 | |
| 427 | /* |
| 428 | * master-id validation. The master id may not be changed by a |
| 429 | * mount update. |
| 430 | */ |
| 431 | if (info.hflags & HMNT_MASTERID) { |
| 432 | if (hmp && hmp->master_id != info.master_id) { |
| 433 | kprintf("HAMMER: cannot change master id " |
| 434 | "with mount update\n"); |
| 435 | return(EINVAL); |
| 436 | } |
| 437 | master_id = info.master_id; |
| 438 | if (master_id < -1 || master_id >= HAMMER_MAX_MASTERS) |
| 439 | return (EINVAL); |
| 440 | } else { |
| 441 | if (hmp) |
| 442 | master_id = hmp->master_id; |
| 443 | else |
| 444 | master_id = 0; |
| 445 | } |
| 446 | |
| 447 | /* |
| 448 | * Internal mount data structure |
| 449 | */ |
| 450 | if (hmp == NULL) { |
| 451 | hmp = kmalloc(sizeof(*hmp), M_HAMMER, M_WAITOK | M_ZERO); |
| 452 | mp->mnt_data = (qaddr_t)hmp; |
| 453 | hmp->mp = mp; |
| 454 | |
| 455 | /* |
| 456 | * Make sure kmalloc type limits are set appropriately. |
| 457 | * |
| 458 | * Our inode kmalloc group is sized based on maxvnodes |
| 459 | * (controlled by the system, not us). |
| 460 | */ |
| 461 | kmalloc_create(&hmp->m_misc, "HAMMER-others"); |
| 462 | kmalloc_create(&hmp->m_inodes, "HAMMER-inodes"); |
| 463 | |
| 464 | kmalloc_raise_limit(hmp->m_inodes, 0); /* unlimited */ |
| 465 | |
| 466 | hmp->root_btree_beg.localization = 0x00000000U; |
| 467 | hmp->root_btree_beg.obj_id = -0x8000000000000000LL; |
| 468 | hmp->root_btree_beg.key = -0x8000000000000000LL; |
| 469 | hmp->root_btree_beg.create_tid = 1; |
| 470 | hmp->root_btree_beg.delete_tid = 1; |
| 471 | hmp->root_btree_beg.rec_type = 0; |
| 472 | hmp->root_btree_beg.obj_type = 0; |
| 473 | hmp->root_btree_beg.btype = HAMMER_BTREE_TYPE_NONE; |
| 474 | |
| 475 | hmp->root_btree_end.localization = 0xFFFFFFFFU; |
| 476 | hmp->root_btree_end.obj_id = 0x7FFFFFFFFFFFFFFFLL; |
| 477 | hmp->root_btree_end.key = 0x7FFFFFFFFFFFFFFFLL; |
| 478 | hmp->root_btree_end.create_tid = 0xFFFFFFFFFFFFFFFFULL; |
| 479 | hmp->root_btree_end.delete_tid = 0; /* special case */ |
| 480 | hmp->root_btree_end.rec_type = 0xFFFFU; |
| 481 | hmp->root_btree_end.obj_type = 0; |
| 482 | hmp->root_btree_end.btype = HAMMER_BTREE_TYPE_NONE; |
| 483 | |
| 484 | hmp->krate.freq = 1; /* maximum reporting rate (hz) */ |
| 485 | hmp->krate.count = -16; /* initial burst */ |
| 486 | hmp->kdiag.freq = 1; /* maximum reporting rate (hz) */ |
| 487 | hmp->kdiag.count = -16; /* initial burst */ |
| 488 | |
| 489 | hmp->sync_lock.refs = 1; |
| 490 | hmp->free_lock.refs = 1; |
| 491 | hmp->undo_lock.refs = 1; |
| 492 | hmp->blkmap_lock.refs = 1; |
| 493 | hmp->snapshot_lock.refs = 1; |
| 494 | hmp->volume_lock.refs = 1; |
| 495 | |
| 496 | TAILQ_INIT(&hmp->delay_list); |
| 497 | TAILQ_INIT(&hmp->flush_group_list); |
| 498 | TAILQ_INIT(&hmp->objid_cache_list); |
| 499 | TAILQ_INIT(&hmp->undo_lru_list); |
| 500 | TAILQ_INIT(&hmp->reclaim_list); |
| 501 | |
| 502 | RB_INIT(&hmp->rb_dedup_crc_root); |
| 503 | RB_INIT(&hmp->rb_dedup_off_root); |
| 504 | TAILQ_INIT(&hmp->dedup_lru_list); |
| 505 | } |
| 506 | hmp->hflags &= ~HMNT_USERFLAGS; |
| 507 | hmp->hflags |= info.hflags & HMNT_USERFLAGS; |
| 508 | |
| 509 | hmp->master_id = master_id; |
| 510 | |
| 511 | if (info.asof) { |
| 512 | mp->mnt_flag |= MNT_RDONLY; |
| 513 | hmp->asof = info.asof; |
| 514 | } else { |
| 515 | hmp->asof = HAMMER_MAX_TID; |
| 516 | } |
| 517 | |
| 518 | hmp->volume_to_remove = -1; |
| 519 | |
| 520 | /* |
| 521 | * Re-open read-write if originally read-only, or vise-versa. |
| 522 | * |
| 523 | * When going from read-only to read-write execute the stage2 |
| 524 | * recovery if it has not already been run. |
| 525 | */ |
| 526 | if (mp->mnt_flag & MNT_UPDATE) { |
| 527 | lwkt_gettoken(&hmp->fs_token); |
| 528 | error = 0; |
| 529 | if (hmp->ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) { |
| 530 | kprintf("HAMMER: read-only -> read-write\n"); |
| 531 | hmp->ronly = 0; |
| 532 | RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL, |
| 533 | hammer_adjust_volume_mode, NULL); |
| 534 | rootvol = hammer_get_root_volume(hmp, &error); |
| 535 | if (rootvol) { |
| 536 | hammer_recover_flush_buffers(hmp, rootvol, 1); |
| 537 | error = hammer_recover_stage2(hmp, rootvol); |
| 538 | bcopy(rootvol->ondisk->vol0_blockmap, |
| 539 | hmp->blockmap, |
| 540 | sizeof(hmp->blockmap)); |
| 541 | hammer_rel_volume(rootvol, 0); |
| 542 | } |
| 543 | RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL, |
| 544 | hammer_reload_inode, NULL); |
| 545 | /* kernel clears MNT_RDONLY */ |
| 546 | } else if (hmp->ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { |
| 547 | kprintf("HAMMER: read-write -> read-only\n"); |
| 548 | hmp->ronly = 1; /* messy */ |
| 549 | RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL, |
| 550 | hammer_reload_inode, NULL); |
| 551 | hmp->ronly = 0; |
| 552 | hammer_flusher_sync(hmp); |
| 553 | hammer_flusher_sync(hmp); |
| 554 | hammer_flusher_sync(hmp); |
| 555 | hmp->ronly = 1; |
| 556 | RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL, |
| 557 | hammer_adjust_volume_mode, NULL); |
| 558 | } |
| 559 | lwkt_reltoken(&hmp->fs_token); |
| 560 | return(error); |
| 561 | } |
| 562 | |
| 563 | RB_INIT(&hmp->rb_vols_root); |
| 564 | RB_INIT(&hmp->rb_inos_root); |
| 565 | RB_INIT(&hmp->rb_redo_root); |
| 566 | RB_INIT(&hmp->rb_nods_root); |
| 567 | RB_INIT(&hmp->rb_undo_root); |
| 568 | RB_INIT(&hmp->rb_resv_root); |
| 569 | RB_INIT(&hmp->rb_bufs_root); |
| 570 | RB_INIT(&hmp->rb_pfsm_root); |
| 571 | |
| 572 | hmp->ronly = ((mp->mnt_flag & MNT_RDONLY) != 0); |
| 573 | |
| 574 | RB_INIT(&hmp->volu_root); |
| 575 | RB_INIT(&hmp->undo_root); |
| 576 | RB_INIT(&hmp->data_root); |
| 577 | RB_INIT(&hmp->meta_root); |
| 578 | RB_INIT(&hmp->lose_root); |
| 579 | TAILQ_INIT(&hmp->iorun_list); |
| 580 | |
| 581 | lwkt_token_init(&hmp->fs_token, "hammerfs"); |
| 582 | lwkt_token_init(&hmp->io_token, "hammerio"); |
| 583 | |
| 584 | lwkt_gettoken(&hmp->fs_token); |
| 585 | |
| 586 | /* |
| 587 | * Load volumes |
| 588 | */ |
| 589 | path = objcache_get(namei_oc, M_WAITOK); |
| 590 | hmp->nvolumes = -1; |
| 591 | for (i = 0; i < info.nvolumes; ++i) { |
| 592 | if (mntpt == NULL) { |
| 593 | /* |
| 594 | * Root mount. |
| 595 | */ |
| 596 | KKASSERT(next_volume_ptr != NULL); |
| 597 | strcpy(path, ""); |
| 598 | if (*next_volume_ptr != '/') { |
| 599 | /* relative path */ |
| 600 | strcpy(path, "/dev/"); |
| 601 | } |
| 602 | int k; |
| 603 | for (k = strlen(path); k < MAXPATHLEN-1; ++k) { |
| 604 | if (*next_volume_ptr == '\0') { |
| 605 | break; |
| 606 | } else if (*next_volume_ptr == ':') { |
| 607 | ++next_volume_ptr; |
| 608 | break; |
| 609 | } else { |
| 610 | path[k] = *next_volume_ptr; |
| 611 | ++next_volume_ptr; |
| 612 | } |
| 613 | } |
| 614 | path[k] = '\0'; |
| 615 | |
| 616 | error = 0; |
| 617 | cdev_t dev = kgetdiskbyname(path); |
| 618 | error = bdevvp(dev, &devvp); |
| 619 | if (error) { |
| 620 | kprintf("hammer_mount: can't find devvp\n"); |
| 621 | } |
| 622 | } else { |
| 623 | error = copyin(&info.volumes[i], &upath, |
| 624 | sizeof(char *)); |
| 625 | if (error == 0) |
| 626 | error = copyinstr(upath, path, |
| 627 | MAXPATHLEN, NULL); |
| 628 | } |
| 629 | if (error == 0) |
| 630 | error = hammer_install_volume(hmp, path, devvp, NULL); |
| 631 | if (error) |
| 632 | break; |
| 633 | } |
| 634 | objcache_put(namei_oc, path); |
| 635 | |
| 636 | /* |
| 637 | * Make sure we found a root volume |
| 638 | */ |
| 639 | if (hmp->rootvol == NULL) { |
| 640 | kprintf("hammer_mount: No root volume found!\n"); |
| 641 | error = EINVAL; |
| 642 | goto failed; |
| 643 | } |
| 644 | |
| 645 | /* |
| 646 | * Check that all required volumes are available |
| 647 | */ |
| 648 | if (error == 0 && hammer_mountcheck_volumes(hmp)) { |
| 649 | kprintf("hammer_mount: Missing volumes, cannot mount!\n"); |
| 650 | error = EINVAL; |
| 651 | goto failed; |
| 652 | } |
| 653 | |
| 654 | /* |
| 655 | * Other errors |
| 656 | */ |
| 657 | if (error) { |
| 658 | kprintf("hammer_mount: Failed to load volumes!\n"); |
| 659 | goto failed; |
| 660 | } |
| 661 | |
| 662 | nvolumes = hammer_get_installed_volumes(hmp); |
| 663 | if (hmp->nvolumes != nvolumes) { |
| 664 | kprintf("hammer_mount: volume header says %d volumes, " |
| 665 | "but %d installed\n", |
| 666 | hmp->nvolumes, nvolumes); |
| 667 | error = EINVAL; |
| 668 | goto failed; |
| 669 | } |
| 670 | |
| 671 | /* |
| 672 | * No errors, setup enough of the mount point so we can lookup the |
| 673 | * root vnode. |
| 674 | */ |
| 675 | mp->mnt_iosize_max = MAXPHYS; |
| 676 | mp->mnt_kern_flag |= MNTK_FSMID; |
| 677 | mp->mnt_kern_flag |= MNTK_THR_SYNC; /* new vsyncscan semantics */ |
| 678 | |
| 679 | /* |
| 680 | * MPSAFE code. Note that VOPs and VFSops which are not MPSAFE |
| 681 | * will acquire a per-mount token prior to entry and release it |
| 682 | * on return. |
| 683 | */ |
| 684 | mp->mnt_kern_flag |= MNTK_ALL_MPSAFE; |
| 685 | |
| 686 | /* |
| 687 | * note: f_iosize is used by vnode_pager_haspage() when constructing |
| 688 | * its VOP_BMAP call. |
| 689 | */ |
| 690 | mp->mnt_stat.f_iosize = HAMMER_BUFSIZE; |
| 691 | mp->mnt_stat.f_bsize = HAMMER_BUFSIZE; |
| 692 | |
| 693 | mp->mnt_vstat.f_frsize = HAMMER_BUFSIZE; |
| 694 | mp->mnt_vstat.f_bsize = HAMMER_BUFSIZE; |
| 695 | |
| 696 | mp->mnt_maxsymlinklen = 255; |
| 697 | mp->mnt_flag |= MNT_LOCAL; |
| 698 | |
| 699 | vfs_add_vnodeops(mp, &hammer_vnode_vops, &mp->mnt_vn_norm_ops); |
| 700 | vfs_add_vnodeops(mp, &hammer_spec_vops, &mp->mnt_vn_spec_ops); |
| 701 | vfs_add_vnodeops(mp, &hammer_fifo_vops, &mp->mnt_vn_fifo_ops); |
| 702 | |
| 703 | /* |
| 704 | * The root volume's ondisk pointer is only valid if we hold a |
| 705 | * reference to it. |
| 706 | */ |
| 707 | rootvol = hammer_get_root_volume(hmp, &error); |
| 708 | if (error) |
| 709 | goto failed; |
| 710 | |
| 711 | /* |
| 712 | * Perform any necessary UNDO operations. The recovery code does |
| 713 | * call hammer_undo_lookup() so we have to pre-cache the blockmap, |
| 714 | * and then re-copy it again after recovery is complete. |
| 715 | * |
| 716 | * If this is a read-only mount the UNDO information is retained |
| 717 | * in memory in the form of dirty buffer cache buffers, and not |
| 718 | * written back to the media. |
| 719 | */ |
| 720 | bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap, |
| 721 | sizeof(hmp->blockmap)); |
| 722 | |
| 723 | /* |
| 724 | * Check filesystem version |
| 725 | */ |
| 726 | hmp->version = rootvol->ondisk->vol_version; |
| 727 | if (hmp->version < HAMMER_VOL_VERSION_MIN || |
| 728 | hmp->version > HAMMER_VOL_VERSION_MAX) { |
| 729 | kprintf("HAMMER: mount unsupported fs version %d\n", |
| 730 | hmp->version); |
| 731 | error = ERANGE; |
| 732 | goto done; |
| 733 | } |
| 734 | |
| 735 | /* |
| 736 | * The undo_rec_limit limits the size of flush groups to avoid |
| 737 | * blowing out the UNDO FIFO. This calculation is typically in |
| 738 | * the tens of thousands and is designed primarily when small |
| 739 | * HAMMER filesystems are created. |
| 740 | */ |
| 741 | hmp->undo_rec_limit = hammer_undo_max(hmp) / 8192 + 100; |
| 742 | if (hammer_debug_general & 0x0001) |
| 743 | kprintf("HAMMER: undo_rec_limit %d\n", hmp->undo_rec_limit); |
| 744 | |
| 745 | /* |
| 746 | * NOTE: Recover stage1 not only handles meta-data recovery, it |
| 747 | * also sets hmp->undo_seqno for HAMMER VERSION 4+ filesystems. |
| 748 | */ |
| 749 | error = hammer_recover_stage1(hmp, rootvol); |
| 750 | if (error) { |
| 751 | kprintf("Failed to recover HAMMER filesystem on mount\n"); |
| 752 | goto done; |
| 753 | } |
| 754 | |
| 755 | /* |
| 756 | * Finish setup now that we have a good root volume. |
| 757 | * |
| 758 | * The top 16 bits of fsid.val[1] is a pfs id. |
| 759 | */ |
| 760 | ksnprintf(mp->mnt_stat.f_mntfromname, |
| 761 | sizeof(mp->mnt_stat.f_mntfromname), "%s", |
| 762 | rootvol->ondisk->vol_name); |
| 763 | mp->mnt_stat.f_fsid.val[0] = |
| 764 | crc32((char *)&rootvol->ondisk->vol_fsid + 0, 8); |
| 765 | mp->mnt_stat.f_fsid.val[1] = |
| 766 | crc32((char *)&rootvol->ondisk->vol_fsid + 8, 8); |
| 767 | mp->mnt_stat.f_fsid.val[1] &= 0x0000FFFF; |
| 768 | |
| 769 | mp->mnt_vstat.f_fsid_uuid = rootvol->ondisk->vol_fsid; |
| 770 | mp->mnt_vstat.f_fsid = crc32(&mp->mnt_vstat.f_fsid_uuid, |
| 771 | sizeof(mp->mnt_vstat.f_fsid_uuid)); |
| 772 | |
| 773 | /* |
| 774 | * Certain often-modified fields in the root volume are cached in |
| 775 | * the hammer_mount structure so we do not have to generate lots |
| 776 | * of little UNDO structures for them. |
| 777 | * |
| 778 | * Recopy after recovery. This also has the side effect of |
| 779 | * setting our cached undo FIFO's first_offset, which serves to |
| 780 | * placemark the FIFO start for the NEXT flush cycle while the |
| 781 | * on-disk first_offset represents the LAST flush cycle. |
| 782 | */ |
| 783 | hmp->next_tid = rootvol->ondisk->vol0_next_tid; |
| 784 | hmp->flush_tid1 = hmp->next_tid; |
| 785 | hmp->flush_tid2 = hmp->next_tid; |
| 786 | bcopy(rootvol->ondisk->vol0_blockmap, hmp->blockmap, |
| 787 | sizeof(hmp->blockmap)); |
| 788 | hmp->copy_stat_freebigblocks = rootvol->ondisk->vol0_stat_freebigblocks; |
| 789 | |
| 790 | hammer_flusher_create(hmp); |
| 791 | |
| 792 | /* |
| 793 | * Locate the root directory with an obj_id of 1. |
| 794 | */ |
| 795 | error = hammer_vfs_vget(mp, NULL, HAMMER_OBJID_ROOT, &rootvp); |
| 796 | if (error) |
| 797 | goto done; |
| 798 | vput(rootvp); |
| 799 | if (hmp->ronly == 0) |
| 800 | error = hammer_recover_stage2(hmp, rootvol); |
| 801 | |
| 802 | /* |
| 803 | * If the stage2 recovery fails be sure to clean out all cached |
| 804 | * vnodes before throwing away the mount structure or bad things |
| 805 | * will happen. |
| 806 | */ |
| 807 | if (error) |
| 808 | vflush(mp, 0, 0); |
| 809 | |
| 810 | done: |
| 811 | if ((mp->mnt_flag & MNT_UPDATE) == 0) { |
| 812 | /* New mount */ |
| 813 | |
| 814 | /* Populate info for mount point (NULL pad)*/ |
| 815 | bzero(mp->mnt_stat.f_mntonname, MNAMELEN); |
| 816 | size_t size; |
| 817 | if (mntpt) { |
| 818 | copyinstr(mntpt, mp->mnt_stat.f_mntonname, |
| 819 | MNAMELEN -1, &size); |
| 820 | } else { /* Root mount */ |
| 821 | mp->mnt_stat.f_mntonname[0] = '/'; |
| 822 | } |
| 823 | } |
| 824 | (void)VFS_STATFS(mp, &mp->mnt_stat, cred); |
| 825 | hammer_rel_volume(rootvol, 0); |
| 826 | failed: |
| 827 | /* |
| 828 | * Cleanup and return. |
| 829 | */ |
| 830 | if (error) { |
| 831 | /* called with fs_token held */ |
| 832 | hammer_free_hmp(mp); |
| 833 | } else { |
| 834 | lwkt_reltoken(&hmp->fs_token); |
| 835 | } |
| 836 | return (error); |
| 837 | } |
| 838 | |
| 839 | static int |
| 840 | hammer_vfs_unmount(struct mount *mp, int mntflags) |
| 841 | { |
| 842 | hammer_mount_t hmp = (void *)mp->mnt_data; |
| 843 | int flags; |
| 844 | int error; |
| 845 | |
| 846 | /* |
| 847 | * Clean out the vnodes |
| 848 | */ |
| 849 | lwkt_gettoken(&hmp->fs_token); |
| 850 | flags = 0; |
| 851 | if (mntflags & MNT_FORCE) |
| 852 | flags |= FORCECLOSE; |
| 853 | error = vflush(mp, 0, flags); |
| 854 | |
| 855 | /* |
| 856 | * Clean up the internal mount structure and related entities. This |
| 857 | * may issue I/O. |
| 858 | */ |
| 859 | if (error == 0) { |
| 860 | /* called with fs_token held */ |
| 861 | hammer_free_hmp(mp); |
| 862 | } else { |
| 863 | lwkt_reltoken(&hmp->fs_token); |
| 864 | } |
| 865 | return(error); |
| 866 | } |
| 867 | |
| 868 | /* |
| 869 | * Clean up the internal mount structure and disassociate it from the mount. |
| 870 | * This may issue I/O. |
| 871 | * |
| 872 | * Called with fs_token held. |
| 873 | */ |
| 874 | static void |
| 875 | hammer_free_hmp(struct mount *mp) |
| 876 | { |
| 877 | hammer_mount_t hmp = (void *)mp->mnt_data; |
| 878 | hammer_flush_group_t flg; |
| 879 | |
| 880 | /* |
| 881 | * Flush anything dirty. This won't even run if the |
| 882 | * filesystem errored-out. |
| 883 | */ |
| 884 | hammer_flush_dirty(hmp, 30); |
| 885 | |
| 886 | /* |
| 887 | * If the mount had a critical error we have to destroy any |
| 888 | * remaining inodes before we can finish cleaning up the flusher. |
| 889 | */ |
| 890 | if (hmp->flags & HAMMER_MOUNT_CRITICAL_ERROR) { |
| 891 | RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL, |
| 892 | hammer_destroy_inode_callback, NULL); |
| 893 | } |
| 894 | |
| 895 | /* |
| 896 | * There shouldn't be any inodes left now and any left over |
| 897 | * flush groups should now be empty. |
| 898 | */ |
| 899 | KKASSERT(RB_EMPTY(&hmp->rb_inos_root)); |
| 900 | while ((flg = TAILQ_FIRST(&hmp->flush_group_list)) != NULL) { |
| 901 | TAILQ_REMOVE(&hmp->flush_group_list, flg, flush_entry); |
| 902 | KKASSERT(RB_EMPTY(&flg->flush_tree)); |
| 903 | if (flg->refs) { |
| 904 | kprintf("HAMMER: Warning, flush_group %p was " |
| 905 | "not empty on umount!\n", flg); |
| 906 | } |
| 907 | kfree(flg, hmp->m_misc); |
| 908 | } |
| 909 | |
| 910 | /* |
| 911 | * We can finally destroy the flusher |
| 912 | */ |
| 913 | hammer_flusher_destroy(hmp); |
| 914 | |
| 915 | /* |
| 916 | * We may have held recovered buffers due to a read-only mount. |
| 917 | * These must be discarded. |
| 918 | */ |
| 919 | if (hmp->ronly) |
| 920 | hammer_recover_flush_buffers(hmp, NULL, -1); |
| 921 | |
| 922 | /* |
| 923 | * Unload buffers and then volumes |
| 924 | */ |
| 925 | RB_SCAN(hammer_buf_rb_tree, &hmp->rb_bufs_root, NULL, |
| 926 | hammer_unload_buffer, NULL); |
| 927 | RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL, |
| 928 | hammer_unload_volume, NULL); |
| 929 | |
| 930 | mp->mnt_data = NULL; |
| 931 | mp->mnt_flag &= ~MNT_LOCAL; |
| 932 | hmp->mp = NULL; |
| 933 | hammer_destroy_objid_cache(hmp); |
| 934 | hammer_destroy_dedup_cache(hmp); |
| 935 | if (hmp->dedup_free_cache != NULL) { |
| 936 | kfree(hmp->dedup_free_cache, hmp->m_misc); |
| 937 | hmp->dedup_free_cache = NULL; |
| 938 | } |
| 939 | kmalloc_destroy(&hmp->m_misc); |
| 940 | kmalloc_destroy(&hmp->m_inodes); |
| 941 | lwkt_reltoken(&hmp->fs_token); |
| 942 | kfree(hmp, M_HAMMER); |
| 943 | } |
| 944 | |
| 945 | /* |
| 946 | * Report critical errors. ip may be NULL. |
| 947 | */ |
| 948 | void |
| 949 | hammer_critical_error(hammer_mount_t hmp, hammer_inode_t ip, |
| 950 | int error, const char *msg) |
| 951 | { |
| 952 | hmp->flags |= HAMMER_MOUNT_CRITICAL_ERROR; |
| 953 | |
| 954 | krateprintf(&hmp->krate, |
| 955 | "HAMMER(%s): Critical error inode=%jd error=%d %s\n", |
| 956 | hmp->mp->mnt_stat.f_mntfromname, |
| 957 | (intmax_t)(ip ? ip->obj_id : -1), |
| 958 | error, msg); |
| 959 | |
| 960 | if (hmp->ronly == 0) { |
| 961 | hmp->ronly = 2; /* special errored read-only mode */ |
| 962 | hmp->mp->mnt_flag |= MNT_RDONLY; |
| 963 | RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL, |
| 964 | hammer_adjust_volume_mode, NULL); |
| 965 | kprintf("HAMMER(%s): Forcing read-only mode\n", |
| 966 | hmp->mp->mnt_stat.f_mntfromname); |
| 967 | } |
| 968 | hmp->error = error; |
| 969 | if (hammer_debug_critical) |
| 970 | Debugger("Entering debugger"); |
| 971 | } |
| 972 | |
| 973 | |
| 974 | /* |
| 975 | * Obtain a vnode for the specified inode number. An exclusively locked |
| 976 | * vnode is returned. |
| 977 | */ |
| 978 | int |
| 979 | hammer_vfs_vget(struct mount *mp, struct vnode *dvp, |
| 980 | ino_t ino, struct vnode **vpp) |
| 981 | { |
| 982 | struct hammer_transaction trans; |
| 983 | struct hammer_mount *hmp = (void *)mp->mnt_data; |
| 984 | struct hammer_inode *ip; |
| 985 | int error; |
| 986 | u_int32_t localization; |
| 987 | |
| 988 | lwkt_gettoken(&hmp->fs_token); |
| 989 | hammer_simple_transaction(&trans, hmp); |
| 990 | |
| 991 | /* |
| 992 | * If a directory vnode is supplied (mainly NFS) then we can acquire |
| 993 | * the PFS domain from it. Otherwise we would only be able to vget |
| 994 | * inodes in the root PFS. |
| 995 | */ |
| 996 | if (dvp) { |
| 997 | localization = HAMMER_DEF_LOCALIZATION + |
| 998 | VTOI(dvp)->obj_localization; |
| 999 | } else { |
| 1000 | localization = HAMMER_DEF_LOCALIZATION; |
| 1001 | } |
| 1002 | |
| 1003 | /* |
| 1004 | * Lookup the requested HAMMER inode. The structure must be |
| 1005 | * left unlocked while we manipulate the related vnode to avoid |
| 1006 | * a deadlock. |
| 1007 | */ |
| 1008 | ip = hammer_get_inode(&trans, NULL, ino, |
| 1009 | hmp->asof, localization, |
| 1010 | 0, &error); |
| 1011 | if (ip == NULL) { |
| 1012 | *vpp = NULL; |
| 1013 | } else { |
| 1014 | error = hammer_get_vnode(ip, vpp); |
| 1015 | hammer_rel_inode(ip, 0); |
| 1016 | } |
| 1017 | hammer_done_transaction(&trans); |
| 1018 | lwkt_reltoken(&hmp->fs_token); |
| 1019 | return (error); |
| 1020 | } |
| 1021 | |
| 1022 | /* |
| 1023 | * Return the root vnode for the filesystem. |
| 1024 | * |
| 1025 | * HAMMER stores the root vnode in the hammer_mount structure so |
| 1026 | * getting it is easy. |
| 1027 | */ |
| 1028 | static int |
| 1029 | hammer_vfs_root(struct mount *mp, struct vnode **vpp) |
| 1030 | { |
| 1031 | int error; |
| 1032 | |
| 1033 | error = hammer_vfs_vget(mp, NULL, HAMMER_OBJID_ROOT, vpp); |
| 1034 | return (error); |
| 1035 | } |
| 1036 | |
| 1037 | static int |
| 1038 | hammer_vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) |
| 1039 | { |
| 1040 | struct hammer_mount *hmp = (void *)mp->mnt_data; |
| 1041 | hammer_volume_t volume; |
| 1042 | hammer_volume_ondisk_t ondisk; |
| 1043 | int error; |
| 1044 | int64_t bfree; |
| 1045 | int64_t breserved; |
| 1046 | |
| 1047 | lwkt_gettoken(&hmp->fs_token); |
| 1048 | volume = hammer_get_root_volume(hmp, &error); |
| 1049 | if (error) { |
| 1050 | lwkt_reltoken(&hmp->fs_token); |
| 1051 | return(error); |
| 1052 | } |
| 1053 | ondisk = volume->ondisk; |
| 1054 | |
| 1055 | /* |
| 1056 | * Basic stats |
| 1057 | */ |
| 1058 | _hammer_checkspace(hmp, HAMMER_CHKSPC_WRITE, &breserved); |
| 1059 | mp->mnt_stat.f_files = ondisk->vol0_stat_inodes; |
| 1060 | bfree = ondisk->vol0_stat_freebigblocks * HAMMER_BIGBLOCK_SIZE; |
| 1061 | hammer_rel_volume(volume, 0); |
| 1062 | |
| 1063 | mp->mnt_stat.f_bfree = (bfree - breserved) / HAMMER_BUFSIZE; |
| 1064 | mp->mnt_stat.f_bavail = mp->mnt_stat.f_bfree; |
| 1065 | if (mp->mnt_stat.f_files < 0) |
| 1066 | mp->mnt_stat.f_files = 0; |
| 1067 | |
| 1068 | *sbp = mp->mnt_stat; |
| 1069 | lwkt_reltoken(&hmp->fs_token); |
| 1070 | return(0); |
| 1071 | } |
| 1072 | |
| 1073 | static int |
| 1074 | hammer_vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred) |
| 1075 | { |
| 1076 | struct hammer_mount *hmp = (void *)mp->mnt_data; |
| 1077 | hammer_volume_t volume; |
| 1078 | hammer_volume_ondisk_t ondisk; |
| 1079 | int error; |
| 1080 | int64_t bfree; |
| 1081 | int64_t breserved; |
| 1082 | |
| 1083 | lwkt_gettoken(&hmp->fs_token); |
| 1084 | volume = hammer_get_root_volume(hmp, &error); |
| 1085 | if (error) { |
| 1086 | lwkt_reltoken(&hmp->fs_token); |
| 1087 | return(error); |
| 1088 | } |
| 1089 | ondisk = volume->ondisk; |
| 1090 | |
| 1091 | /* |
| 1092 | * Basic stats |
| 1093 | */ |
| 1094 | _hammer_checkspace(hmp, HAMMER_CHKSPC_WRITE, &breserved); |
| 1095 | mp->mnt_vstat.f_files = ondisk->vol0_stat_inodes; |
| 1096 | bfree = ondisk->vol0_stat_freebigblocks * HAMMER_BIGBLOCK_SIZE; |
| 1097 | hammer_rel_volume(volume, 0); |
| 1098 | |
| 1099 | mp->mnt_vstat.f_bfree = (bfree - breserved) / HAMMER_BUFSIZE; |
| 1100 | mp->mnt_vstat.f_bavail = mp->mnt_vstat.f_bfree; |
| 1101 | if (mp->mnt_vstat.f_files < 0) |
| 1102 | mp->mnt_vstat.f_files = 0; |
| 1103 | *sbp = mp->mnt_vstat; |
| 1104 | lwkt_reltoken(&hmp->fs_token); |
| 1105 | return(0); |
| 1106 | } |
| 1107 | |
| 1108 | /* |
| 1109 | * Sync the filesystem. Currently we have to run it twice, the second |
| 1110 | * one will advance the undo start index to the end index, so if a crash |
| 1111 | * occurs no undos will be run on mount. |
| 1112 | * |
| 1113 | * We do not sync the filesystem if we are called from a panic. If we did |
| 1114 | * we might end up blowing up a sync that was already in progress. |
| 1115 | */ |
| 1116 | static int |
| 1117 | hammer_vfs_sync(struct mount *mp, int waitfor) |
| 1118 | { |
| 1119 | struct hammer_mount *hmp = (void *)mp->mnt_data; |
| 1120 | int error; |
| 1121 | |
| 1122 | lwkt_gettoken(&hmp->fs_token); |
| 1123 | if (panicstr == NULL) { |
| 1124 | error = hammer_sync_hmp(hmp, waitfor); |
| 1125 | } else { |
| 1126 | error = EIO; |
| 1127 | } |
| 1128 | lwkt_reltoken(&hmp->fs_token); |
| 1129 | return (error); |
| 1130 | } |
| 1131 | |
| 1132 | /* |
| 1133 | * Convert a vnode to a file handle. |
| 1134 | * |
| 1135 | * Accesses read-only fields on already-referenced structures so |
| 1136 | * no token is needed. |
| 1137 | */ |
| 1138 | static int |
| 1139 | hammer_vfs_vptofh(struct vnode *vp, struct fid *fhp) |
| 1140 | { |
| 1141 | hammer_inode_t ip; |
| 1142 | |
| 1143 | KKASSERT(MAXFIDSZ >= 16); |
| 1144 | ip = VTOI(vp); |
| 1145 | fhp->fid_len = offsetof(struct fid, fid_data[16]); |
| 1146 | fhp->fid_ext = ip->obj_localization >> 16; |
| 1147 | bcopy(&ip->obj_id, fhp->fid_data + 0, sizeof(ip->obj_id)); |
| 1148 | bcopy(&ip->obj_asof, fhp->fid_data + 8, sizeof(ip->obj_asof)); |
| 1149 | return(0); |
| 1150 | } |
| 1151 | |
| 1152 | |
| 1153 | /* |
| 1154 | * Convert a file handle back to a vnode. |
| 1155 | * |
| 1156 | * Use rootvp to enforce PFS isolation when a PFS is exported via a |
| 1157 | * null mount. |
| 1158 | */ |
| 1159 | static int |
| 1160 | hammer_vfs_fhtovp(struct mount *mp, struct vnode *rootvp, |
| 1161 | struct fid *fhp, struct vnode **vpp) |
| 1162 | { |
| 1163 | hammer_mount_t hmp = (void *)mp->mnt_data; |
| 1164 | struct hammer_transaction trans; |
| 1165 | struct hammer_inode *ip; |
| 1166 | struct hammer_inode_info info; |
| 1167 | int error; |
| 1168 | u_int32_t localization; |
| 1169 | |
| 1170 | bcopy(fhp->fid_data + 0, &info.obj_id, sizeof(info.obj_id)); |
| 1171 | bcopy(fhp->fid_data + 8, &info.obj_asof, sizeof(info.obj_asof)); |
| 1172 | if (rootvp) |
| 1173 | localization = VTOI(rootvp)->obj_localization; |
| 1174 | else |
| 1175 | localization = (u_int32_t)fhp->fid_ext << 16; |
| 1176 | |
| 1177 | lwkt_gettoken(&hmp->fs_token); |
| 1178 | hammer_simple_transaction(&trans, hmp); |
| 1179 | |
| 1180 | /* |
| 1181 | * Get/allocate the hammer_inode structure. The structure must be |
| 1182 | * unlocked while we manipulate the related vnode to avoid a |
| 1183 | * deadlock. |
| 1184 | */ |
| 1185 | ip = hammer_get_inode(&trans, NULL, info.obj_id, |
| 1186 | info.obj_asof, localization, 0, &error); |
| 1187 | if (ip) { |
| 1188 | error = hammer_get_vnode(ip, vpp); |
| 1189 | hammer_rel_inode(ip, 0); |
| 1190 | } else { |
| 1191 | *vpp = NULL; |
| 1192 | } |
| 1193 | hammer_done_transaction(&trans); |
| 1194 | lwkt_reltoken(&hmp->fs_token); |
| 1195 | return (error); |
| 1196 | } |
| 1197 | |
| 1198 | static int |
| 1199 | hammer_vfs_checkexp(struct mount *mp, struct sockaddr *nam, |
| 1200 | int *exflagsp, struct ucred **credanonp) |
| 1201 | { |
| 1202 | hammer_mount_t hmp = (void *)mp->mnt_data; |
| 1203 | struct netcred *np; |
| 1204 | int error; |
| 1205 | |
| 1206 | lwkt_gettoken(&hmp->fs_token); |
| 1207 | np = vfs_export_lookup(mp, &hmp->export, nam); |
| 1208 | if (np) { |
| 1209 | *exflagsp = np->netc_exflags; |
| 1210 | *credanonp = &np->netc_anon; |
| 1211 | error = 0; |
| 1212 | } else { |
| 1213 | error = EACCES; |
| 1214 | } |
| 1215 | lwkt_reltoken(&hmp->fs_token); |
| 1216 | return (error); |
| 1217 | |
| 1218 | } |
| 1219 | |
| 1220 | int |
| 1221 | hammer_vfs_export(struct mount *mp, int op, const struct export_args *export) |
| 1222 | { |
| 1223 | hammer_mount_t hmp = (void *)mp->mnt_data; |
| 1224 | int error; |
| 1225 | |
| 1226 | lwkt_gettoken(&hmp->fs_token); |
| 1227 | |
| 1228 | switch(op) { |
| 1229 | case MOUNTCTL_SET_EXPORT: |
| 1230 | error = vfs_export(mp, &hmp->export, export); |
| 1231 | break; |
| 1232 | default: |
| 1233 | error = EOPNOTSUPP; |
| 1234 | break; |
| 1235 | } |
| 1236 | lwkt_reltoken(&hmp->fs_token); |
| 1237 | |
| 1238 | return(error); |
| 1239 | } |
| 1240 | |