| 1 | /* $NetBSD: lfs_vfsops.c,v 1.351 2016/07/07 06:55:44 msaitoh Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1999, 2000, 2001, 2002, 2003, 2007, 2007 |
| 5 | * The NetBSD Foundation, Inc. |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * This code is derived from software contributed to The NetBSD Foundation |
| 9 | * by Konrad E. Schroder <perseant@hhhh.org>. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer. |
| 16 | * 2. Redistributions in binary form must reproduce the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer in the |
| 18 | * documentation and/or other materials provided with the distribution. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 22 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 23 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 24 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 30 | * POSSIBILITY OF SUCH DAMAGE. |
| 31 | */ |
| 32 | /*- |
| 33 | * Copyright (c) 1989, 1991, 1993, 1994 |
| 34 | * The Regents of the University of California. All rights reserved. |
| 35 | * |
| 36 | * Redistribution and use in source and binary forms, with or without |
| 37 | * modification, are permitted provided that the following conditions |
| 38 | * are met: |
| 39 | * 1. Redistributions of source code must retain the above copyright |
| 40 | * notice, this list of conditions and the following disclaimer. |
| 41 | * 2. Redistributions in binary form must reproduce the above copyright |
| 42 | * notice, this list of conditions and the following disclaimer in the |
| 43 | * documentation and/or other materials provided with the distribution. |
| 44 | * 3. Neither the name of the University nor the names of its contributors |
| 45 | * may be used to endorse or promote products derived from this software |
| 46 | * without specific prior written permission. |
| 47 | * |
| 48 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 49 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 50 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 51 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 52 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 53 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 54 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 55 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 56 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 57 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 58 | * SUCH DAMAGE. |
| 59 | * |
| 60 | * @(#)lfs_vfsops.c 8.20 (Berkeley) 6/10/95 |
| 61 | */ |
| 62 | |
| 63 | #include <sys/cdefs.h> |
| 64 | __KERNEL_RCSID(0, "$NetBSD: lfs_vfsops.c,v 1.351 2016/07/07 06:55:44 msaitoh Exp $" ); |
| 65 | |
| 66 | #if defined(_KERNEL_OPT) |
| 67 | #include "opt_lfs.h" |
| 68 | #include "opt_quota.h" |
| 69 | #endif |
| 70 | |
| 71 | #include <sys/param.h> |
| 72 | #include <sys/systm.h> |
| 73 | #include <sys/namei.h> |
| 74 | #include <sys/proc.h> |
| 75 | #include <sys/kernel.h> |
| 76 | #include <sys/vnode.h> |
| 77 | #include <sys/mount.h> |
| 78 | #include <sys/kthread.h> |
| 79 | #include <sys/buf.h> |
| 80 | #include <sys/device.h> |
| 81 | #include <sys/mbuf.h> |
| 82 | #include <sys/file.h> |
| 83 | #include <sys/disklabel.h> |
| 84 | #include <sys/ioctl.h> |
| 85 | #include <sys/errno.h> |
| 86 | #include <sys/malloc.h> |
| 87 | #include <sys/pool.h> |
| 88 | #include <sys/socket.h> |
| 89 | #include <sys/syslog.h> |
| 90 | #include <uvm/uvm_extern.h> |
| 91 | #include <sys/sysctl.h> |
| 92 | #include <sys/conf.h> |
| 93 | #include <sys/kauth.h> |
| 94 | #include <sys/module.h> |
| 95 | #include <sys/syscallvar.h> |
| 96 | #include <sys/syscall.h> |
| 97 | #include <sys/syscallargs.h> |
| 98 | |
| 99 | #include <miscfs/specfs/specdev.h> |
| 100 | |
| 101 | #include <ufs/lfs/ulfs_quotacommon.h> |
| 102 | #include <ufs/lfs/ulfs_inode.h> |
| 103 | #include <ufs/lfs/ulfsmount.h> |
| 104 | #include <ufs/lfs/ulfs_bswap.h> |
| 105 | #include <ufs/lfs/ulfs_extern.h> |
| 106 | |
| 107 | #include <uvm/uvm.h> |
| 108 | #include <uvm/uvm_stat.h> |
| 109 | #include <uvm/uvm_pager.h> |
| 110 | #include <uvm/uvm_pdaemon.h> |
| 111 | |
| 112 | #include <ufs/lfs/lfs.h> |
| 113 | #include <ufs/lfs/lfs_accessors.h> |
| 114 | #include <ufs/lfs/lfs_kernel.h> |
| 115 | #include <ufs/lfs/lfs_extern.h> |
| 116 | |
| 117 | #include <miscfs/genfs/genfs.h> |
| 118 | #include <miscfs/genfs/genfs_node.h> |
| 119 | |
| 120 | MODULE(MODULE_CLASS_VFS, lfs, NULL); |
| 121 | |
| 122 | static int lfs_gop_write(struct vnode *, struct vm_page **, int, int); |
| 123 | static int lfs_mountfs(struct vnode *, struct mount *, struct lwp *); |
| 124 | |
| 125 | static struct sysctllog *lfs_sysctl_log; |
| 126 | |
| 127 | extern const struct vnodeopv_desc lfs_vnodeop_opv_desc; |
| 128 | extern const struct vnodeopv_desc lfs_specop_opv_desc; |
| 129 | extern const struct vnodeopv_desc lfs_fifoop_opv_desc; |
| 130 | |
| 131 | pid_t lfs_writer_daemon = 0; |
| 132 | lwpid_t lfs_writer_lid = 0; |
| 133 | int lfs_do_flush = 0; |
| 134 | #ifdef LFS_KERNEL_RFW |
| 135 | int lfs_do_rfw = 0; |
| 136 | #endif |
| 137 | |
| 138 | const struct vnodeopv_desc * const lfs_vnodeopv_descs[] = { |
| 139 | &lfs_vnodeop_opv_desc, |
| 140 | &lfs_specop_opv_desc, |
| 141 | &lfs_fifoop_opv_desc, |
| 142 | NULL, |
| 143 | }; |
| 144 | |
| 145 | struct vfsops lfs_vfsops = { |
| 146 | .vfs_name = MOUNT_LFS, |
| 147 | .vfs_min_mount_data = sizeof (struct ulfs_args), |
| 148 | .vfs_mount = lfs_mount, |
| 149 | .vfs_start = ulfs_start, |
| 150 | .vfs_unmount = lfs_unmount, |
| 151 | .vfs_root = ulfs_root, |
| 152 | .vfs_quotactl = ulfs_quotactl, |
| 153 | .vfs_statvfs = lfs_statvfs, |
| 154 | .vfs_sync = lfs_sync, |
| 155 | .vfs_vget = lfs_vget, |
| 156 | .vfs_loadvnode = lfs_loadvnode, |
| 157 | .vfs_newvnode = lfs_newvnode, |
| 158 | .vfs_fhtovp = lfs_fhtovp, |
| 159 | .vfs_vptofh = lfs_vptofh, |
| 160 | .vfs_init = lfs_init, |
| 161 | .vfs_reinit = lfs_reinit, |
| 162 | .vfs_done = lfs_done, |
| 163 | .vfs_mountroot = lfs_mountroot, |
| 164 | .vfs_snapshot = (void *)eopnotsupp, |
| 165 | .vfs_extattrctl = lfs_extattrctl, |
| 166 | .vfs_suspendctl = (void *)eopnotsupp, |
| 167 | .vfs_renamelock_enter = genfs_renamelock_enter, |
| 168 | .vfs_renamelock_exit = genfs_renamelock_exit, |
| 169 | .vfs_fsync = (void *)eopnotsupp, |
| 170 | .vfs_opv_descs = lfs_vnodeopv_descs |
| 171 | }; |
| 172 | |
| 173 | const struct genfs_ops lfs_genfsops = { |
| 174 | .gop_size = lfs_gop_size, |
| 175 | .gop_alloc = ulfs_gop_alloc, |
| 176 | .gop_write = lfs_gop_write, |
| 177 | .gop_markupdate = ulfs_gop_markupdate, |
| 178 | }; |
| 179 | |
| 180 | struct shortlong { |
| 181 | const char *sname; |
| 182 | const char *lname; |
| 183 | }; |
| 184 | |
| 185 | static int |
| 186 | sysctl_lfs_dostats(SYSCTLFN_ARGS) |
| 187 | { |
| 188 | extern struct lfs_stats lfs_stats; |
| 189 | extern int lfs_dostats; |
| 190 | int error; |
| 191 | |
| 192 | error = sysctl_lookup(SYSCTLFN_CALL(rnode)); |
| 193 | if (error || newp == NULL) |
| 194 | return (error); |
| 195 | |
| 196 | if (lfs_dostats == 0) |
| 197 | memset(&lfs_stats, 0, sizeof(lfs_stats)); |
| 198 | |
| 199 | return (0); |
| 200 | } |
| 201 | |
| 202 | static void |
| 203 | lfs_sysctl_setup(struct sysctllog **clog) |
| 204 | { |
| 205 | int i; |
| 206 | extern int lfs_writeindir, lfs_dostats, lfs_clean_vnhead, |
| 207 | lfs_fs_pagetrip, lfs_ignore_lazy_sync; |
| 208 | #ifdef DEBUG |
| 209 | extern int lfs_debug_log_subsys[DLOG_MAX]; |
| 210 | struct shortlong dlog_names[DLOG_MAX] = { /* Must match lfs.h ! */ |
| 211 | { "rollforward" , "Debug roll-forward code" }, |
| 212 | { "alloc" , "Debug inode allocation and free list" }, |
| 213 | { "avail" , "Debug space-available-now accounting" }, |
| 214 | { "flush" , "Debug flush triggers" }, |
| 215 | { "lockedlist" , "Debug locked list accounting" }, |
| 216 | { "vnode_verbose" , "Verbose per-vnode-written debugging" }, |
| 217 | { "vnode" , "Debug vnode use during segment write" }, |
| 218 | { "segment" , "Debug segment writing" }, |
| 219 | { "seguse" , "Debug segment used-bytes accounting" }, |
| 220 | { "cleaner" , "Debug cleaning routines" }, |
| 221 | { "mount" , "Debug mount/unmount routines" }, |
| 222 | { "pagecache" , "Debug UBC interactions" }, |
| 223 | { "dirop" , "Debug directory-operation accounting" }, |
| 224 | { "malloc" , "Debug private malloc accounting" }, |
| 225 | }; |
| 226 | #endif /* DEBUG */ |
| 227 | struct shortlong stat_names[] = { /* Must match lfs.h! */ |
| 228 | { "segsused" , "Number of new segments allocated" }, |
| 229 | { "psegwrites" , "Number of partial-segment writes" }, |
| 230 | { "psyncwrites" , "Number of synchronous partial-segment" |
| 231 | " writes" }, |
| 232 | { "pcleanwrites" , "Number of partial-segment writes by the" |
| 233 | " cleaner" }, |
| 234 | { "blocktot" , "Number of blocks written" }, |
| 235 | { "cleanblocks" , "Number of blocks written by the cleaner" }, |
| 236 | { "ncheckpoints" , "Number of checkpoints made" }, |
| 237 | { "nwrites" , "Number of whole writes" }, |
| 238 | { "nsync_writes" , "Number of synchronous writes" }, |
| 239 | { "wait_exceeded" , "Number of times writer waited for" |
| 240 | " cleaner" }, |
| 241 | { "write_exceeded" , "Number of times writer invoked flush" }, |
| 242 | { "flush_invoked" , "Number of times flush was invoked" }, |
| 243 | { "vflush_invoked" , "Number of time vflush was called" }, |
| 244 | { "clean_inlocked" , "Number of vnodes skipped for being dead" }, |
| 245 | { "clean_vnlocked" , "Number of vnodes skipped for vget failure" }, |
| 246 | { "segs_reclaimed" , "Number of segments reclaimed" }, |
| 247 | }; |
| 248 | |
| 249 | sysctl_createv(clog, 0, NULL, NULL, |
| 250 | CTLFLAG_PERMANENT, |
| 251 | CTLTYPE_NODE, "lfs" , |
| 252 | SYSCTL_DESCR("Log-structured file system" ), |
| 253 | NULL, 0, NULL, 0, |
| 254 | CTL_VFS, 5, CTL_EOL); |
| 255 | /* |
| 256 | * XXX the "5" above could be dynamic, thereby eliminating one |
| 257 | * more instance of the "number to vfs" mapping problem, but |
| 258 | * "5" is the order as taken from sys/mount.h |
| 259 | */ |
| 260 | |
| 261 | sysctl_createv(clog, 0, NULL, NULL, |
| 262 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 263 | CTLTYPE_INT, "flushindir" , NULL, |
| 264 | NULL, 0, &lfs_writeindir, 0, |
| 265 | CTL_VFS, 5, LFS_WRITEINDIR, CTL_EOL); |
| 266 | sysctl_createv(clog, 0, NULL, NULL, |
| 267 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 268 | CTLTYPE_INT, "clean_vnhead" , NULL, |
| 269 | NULL, 0, &lfs_clean_vnhead, 0, |
| 270 | CTL_VFS, 5, LFS_CLEAN_VNHEAD, CTL_EOL); |
| 271 | sysctl_createv(clog, 0, NULL, NULL, |
| 272 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 273 | CTLTYPE_INT, "dostats" , |
| 274 | SYSCTL_DESCR("Maintain statistics on LFS operations" ), |
| 275 | sysctl_lfs_dostats, 0, &lfs_dostats, 0, |
| 276 | CTL_VFS, 5, LFS_DOSTATS, CTL_EOL); |
| 277 | sysctl_createv(clog, 0, NULL, NULL, |
| 278 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 279 | CTLTYPE_INT, "pagetrip" , |
| 280 | SYSCTL_DESCR("How many dirty pages in fs triggers" |
| 281 | " a flush" ), |
| 282 | NULL, 0, &lfs_fs_pagetrip, 0, |
| 283 | CTL_VFS, 5, LFS_FS_PAGETRIP, CTL_EOL); |
| 284 | sysctl_createv(clog, 0, NULL, NULL, |
| 285 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 286 | CTLTYPE_INT, "ignore_lazy_sync" , |
| 287 | SYSCTL_DESCR("Lazy Sync is ignored entirely" ), |
| 288 | NULL, 0, &lfs_ignore_lazy_sync, 0, |
| 289 | CTL_VFS, 5, LFS_IGNORE_LAZY_SYNC, CTL_EOL); |
| 290 | #ifdef LFS_KERNEL_RFW |
| 291 | sysctl_createv(clog, 0, NULL, NULL, |
| 292 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 293 | CTLTYPE_INT, "rfw" , |
| 294 | SYSCTL_DESCR("Use in-kernel roll-forward on mount" ), |
| 295 | NULL, 0, &lfs_do_rfw, 0, |
| 296 | CTL_VFS, 5, LFS_DO_RFW, CTL_EOL); |
| 297 | #endif |
| 298 | |
| 299 | sysctl_createv(clog, 0, NULL, NULL, |
| 300 | CTLFLAG_PERMANENT, |
| 301 | CTLTYPE_NODE, "stats" , |
| 302 | SYSCTL_DESCR("Debugging options" ), |
| 303 | NULL, 0, NULL, 0, |
| 304 | CTL_VFS, 5, LFS_STATS, CTL_EOL); |
| 305 | for (i = 0; i < sizeof(struct lfs_stats) / sizeof(u_int); i++) { |
| 306 | sysctl_createv(clog, 0, NULL, NULL, |
| 307 | CTLFLAG_PERMANENT|CTLFLAG_READONLY, |
| 308 | CTLTYPE_INT, stat_names[i].sname, |
| 309 | SYSCTL_DESCR(stat_names[i].lname), |
| 310 | NULL, 0, &(((u_int *)&lfs_stats.segsused)[i]), |
| 311 | 0, CTL_VFS, 5, LFS_STATS, i, CTL_EOL); |
| 312 | } |
| 313 | |
| 314 | #ifdef DEBUG |
| 315 | sysctl_createv(clog, 0, NULL, NULL, |
| 316 | CTLFLAG_PERMANENT, |
| 317 | CTLTYPE_NODE, "debug" , |
| 318 | SYSCTL_DESCR("Debugging options" ), |
| 319 | NULL, 0, NULL, 0, |
| 320 | CTL_VFS, 5, LFS_DEBUGLOG, CTL_EOL); |
| 321 | for (i = 0; i < DLOG_MAX; i++) { |
| 322 | sysctl_createv(clog, 0, NULL, NULL, |
| 323 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 324 | CTLTYPE_INT, dlog_names[i].sname, |
| 325 | SYSCTL_DESCR(dlog_names[i].lname), |
| 326 | NULL, 0, &(lfs_debug_log_subsys[i]), 0, |
| 327 | CTL_VFS, 5, LFS_DEBUGLOG, i, CTL_EOL); |
| 328 | } |
| 329 | #endif |
| 330 | } |
| 331 | |
| 332 | /* old cleaner syscall interface. see VOP_FCNTL() */ |
| 333 | static const struct syscall_package lfs_syscalls[] = { |
| 334 | { SYS_lfs_bmapv, 0, (sy_call_t *)sys_lfs_bmapv }, |
| 335 | { SYS_lfs_markv, 0, (sy_call_t *)sys_lfs_markv }, |
| 336 | { SYS___lfs_segwait50, 0, (sy_call_t *)sys___lfs_segwait50 }, |
| 337 | { SYS_lfs_segclean, 0, (sy_call_t *)sys_lfs_segclean }, |
| 338 | { 0, 0, NULL }, |
| 339 | }; |
| 340 | |
| 341 | static int |
| 342 | lfs_modcmd(modcmd_t cmd, void *arg) |
| 343 | { |
| 344 | int error; |
| 345 | |
| 346 | switch (cmd) { |
| 347 | case MODULE_CMD_INIT: |
| 348 | error = syscall_establish(NULL, lfs_syscalls); |
| 349 | if (error) |
| 350 | return error; |
| 351 | error = vfs_attach(&lfs_vfsops); |
| 352 | if (error != 0) { |
| 353 | syscall_disestablish(NULL, lfs_syscalls); |
| 354 | break; |
| 355 | } |
| 356 | lfs_sysctl_setup(&lfs_sysctl_log); |
| 357 | break; |
| 358 | case MODULE_CMD_FINI: |
| 359 | error = vfs_detach(&lfs_vfsops); |
| 360 | if (error != 0) |
| 361 | break; |
| 362 | syscall_disestablish(NULL, lfs_syscalls); |
| 363 | sysctl_teardown(&lfs_sysctl_log); |
| 364 | break; |
| 365 | default: |
| 366 | error = ENOTTY; |
| 367 | break; |
| 368 | } |
| 369 | |
| 370 | return (error); |
| 371 | } |
| 372 | |
| 373 | /* |
| 374 | * XXX Same structure as FFS inodes? Should we share a common pool? |
| 375 | */ |
| 376 | struct pool lfs_inode_pool; |
| 377 | struct pool lfs_dinode_pool; |
| 378 | struct pool lfs_inoext_pool; |
| 379 | struct pool lfs_lbnentry_pool; |
| 380 | |
| 381 | /* |
| 382 | * The writer daemon. UVM keeps track of how many dirty pages we are holding |
| 383 | * in lfs_subsys_pages; the daemon flushes the filesystem when this value |
| 384 | * crosses the (user-defined) threshhold LFS_MAX_PAGES. |
| 385 | */ |
| 386 | static void |
| 387 | lfs_writerd(void *arg) |
| 388 | { |
| 389 | struct mount *mp, *nmp; |
| 390 | struct lfs *fs; |
| 391 | struct vfsops *vfs = NULL; |
| 392 | int fsflags; |
| 393 | int skipc; |
| 394 | int lfsc; |
| 395 | int wrote_something = 0; |
| 396 | |
| 397 | mutex_enter(&lfs_lock); |
| 398 | lfs_writer_daemon = curproc->p_pid; |
| 399 | lfs_writer_lid = curlwp->l_lid; |
| 400 | mutex_exit(&lfs_lock); |
| 401 | |
| 402 | /* Take an extra reference to the LFS vfsops. */ |
| 403 | vfs = vfs_getopsbyname(MOUNT_LFS); |
| 404 | |
| 405 | mutex_enter(&lfs_lock); |
| 406 | for (;;) { |
| 407 | KASSERT(mutex_owned(&lfs_lock)); |
| 408 | if (wrote_something == 0) |
| 409 | mtsleep(&lfs_writer_daemon, PVM, "lfswriter" , hz/10 + 1, |
| 410 | &lfs_lock); |
| 411 | |
| 412 | KASSERT(mutex_owned(&lfs_lock)); |
| 413 | wrote_something = 0; |
| 414 | |
| 415 | /* |
| 416 | * If global state wants a flush, flush everything. |
| 417 | */ |
| 418 | if (lfs_do_flush || locked_queue_count > LFS_MAX_BUFS || |
| 419 | locked_queue_bytes > LFS_MAX_BYTES || |
| 420 | lfs_subsys_pages > LFS_MAX_PAGES) { |
| 421 | |
| 422 | if (lfs_do_flush) { |
| 423 | DLOG((DLOG_FLUSH, "lfs_writerd: lfs_do_flush\n" )); |
| 424 | } |
| 425 | if (locked_queue_count > LFS_MAX_BUFS) { |
| 426 | DLOG((DLOG_FLUSH, "lfs_writerd: lqc = %d, max %d\n" , |
| 427 | locked_queue_count, LFS_MAX_BUFS)); |
| 428 | } |
| 429 | if (locked_queue_bytes > LFS_MAX_BYTES) { |
| 430 | DLOG((DLOG_FLUSH, "lfs_writerd: lqb = %ld, max %ld\n" , |
| 431 | locked_queue_bytes, LFS_MAX_BYTES)); |
| 432 | } |
| 433 | if (lfs_subsys_pages > LFS_MAX_PAGES) { |
| 434 | DLOG((DLOG_FLUSH, "lfs_writerd: lssp = %d, max %d\n" , |
| 435 | lfs_subsys_pages, LFS_MAX_PAGES)); |
| 436 | } |
| 437 | |
| 438 | lfs_flush(NULL, SEGM_WRITERD, 0); |
| 439 | lfs_do_flush = 0; |
| 440 | KASSERT(mutex_owned(&lfs_lock)); |
| 441 | continue; |
| 442 | } |
| 443 | KASSERT(mutex_owned(&lfs_lock)); |
| 444 | mutex_exit(&lfs_lock); |
| 445 | |
| 446 | /* |
| 447 | * Look through the list of LFSs to see if any of them |
| 448 | * have requested pageouts. |
| 449 | */ |
| 450 | mutex_enter(&mountlist_lock); |
| 451 | lfsc = 0; |
| 452 | skipc = 0; |
| 453 | for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) { |
| 454 | if (vfs_busy(mp, &nmp)) { |
| 455 | ++skipc; |
| 456 | continue; |
| 457 | } |
| 458 | KASSERT(!mutex_owned(&lfs_lock)); |
| 459 | if (strncmp(mp->mnt_stat.f_fstypename, MOUNT_LFS, |
| 460 | sizeof(mp->mnt_stat.f_fstypename)) == 0) { |
| 461 | ++lfsc; |
| 462 | fs = VFSTOULFS(mp)->um_lfs; |
| 463 | daddr_t ooffset = 0; |
| 464 | fsflags = SEGM_SINGLE; |
| 465 | |
| 466 | mutex_enter(&lfs_lock); |
| 467 | ooffset = lfs_sb_getoffset(fs); |
| 468 | |
| 469 | if (lfs_sb_getnextseg(fs) < lfs_sb_getcurseg(fs) && fs->lfs_nowrap) { |
| 470 | /* Don't try to write if we're suspended */ |
| 471 | mutex_exit(&lfs_lock); |
| 472 | vfs_unbusy(mp, false, &nmp); |
| 473 | continue; |
| 474 | } |
| 475 | if (LFS_STARVED_FOR_SEGS(fs)) { |
| 476 | mutex_exit(&lfs_lock); |
| 477 | |
| 478 | DLOG((DLOG_FLUSH, "lfs_writerd: need cleaning before writing possible\n" )); |
| 479 | lfs_wakeup_cleaner(fs); |
| 480 | vfs_unbusy(mp, false, &nmp); |
| 481 | continue; |
| 482 | } |
| 483 | |
| 484 | if ((fs->lfs_dirvcount > LFS_MAX_FSDIROP(fs) || |
| 485 | lfs_dirvcount > LFS_MAX_DIROP) && |
| 486 | fs->lfs_dirops == 0) { |
| 487 | fsflags &= ~SEGM_SINGLE; |
| 488 | fsflags |= SEGM_CKP; |
| 489 | DLOG((DLOG_FLUSH, "lfs_writerd: checkpoint\n" )); |
| 490 | lfs_flush_fs(fs, fsflags); |
| 491 | } else if (fs->lfs_pdflush) { |
| 492 | DLOG((DLOG_FLUSH, "lfs_writerd: pdflush set\n" )); |
| 493 | lfs_flush_fs(fs, fsflags); |
| 494 | } else if (!TAILQ_EMPTY(&fs->lfs_pchainhd)) { |
| 495 | DLOG((DLOG_FLUSH, "lfs_writerd: pchain non-empty\n" )); |
| 496 | mutex_exit(&lfs_lock); |
| 497 | lfs_writer_enter(fs, "wrdirop" ); |
| 498 | lfs_flush_pchain(fs); |
| 499 | lfs_writer_leave(fs); |
| 500 | mutex_enter(&lfs_lock); |
| 501 | } |
| 502 | if (lfs_sb_getoffset(fs) != ooffset) |
| 503 | ++wrote_something; |
| 504 | mutex_exit(&lfs_lock); |
| 505 | } |
| 506 | KASSERT(!mutex_owned(&lfs_lock)); |
| 507 | vfs_unbusy(mp, false, &nmp); |
| 508 | } |
| 509 | if (lfsc + skipc == 0) { |
| 510 | mutex_enter(&lfs_lock); |
| 511 | lfs_writer_daemon = 0; |
| 512 | lfs_writer_lid = 0; |
| 513 | mutex_exit(&lfs_lock); |
| 514 | mutex_exit(&mountlist_lock); |
| 515 | break; |
| 516 | } |
| 517 | mutex_exit(&mountlist_lock); |
| 518 | |
| 519 | mutex_enter(&lfs_lock); |
| 520 | } |
| 521 | KASSERT(!mutex_owned(&lfs_lock)); |
| 522 | KASSERT(!mutex_owned(&mountlist_lock)); |
| 523 | |
| 524 | /* Give up our extra reference so the module can be unloaded. */ |
| 525 | mutex_enter(&vfs_list_lock); |
| 526 | if (vfs != NULL) |
| 527 | vfs->vfs_refcount--; |
| 528 | mutex_exit(&vfs_list_lock); |
| 529 | |
| 530 | /* Done! */ |
| 531 | kthread_exit(0); |
| 532 | } |
| 533 | |
| 534 | /* |
| 535 | * Initialize the filesystem, most work done by ulfs_init. |
| 536 | */ |
| 537 | void |
| 538 | lfs_init(void) |
| 539 | { |
| 540 | |
| 541 | /* |
| 542 | * XXX: should we use separate pools for 32-bit and 64-bit |
| 543 | * dinodes? |
| 544 | */ |
| 545 | malloc_type_attach(M_SEGMENT); |
| 546 | pool_init(&lfs_inode_pool, sizeof(struct inode), 0, 0, 0, |
| 547 | "lfsinopl" , &pool_allocator_nointr, IPL_NONE); |
| 548 | pool_init(&lfs_dinode_pool, sizeof(union lfs_dinode), 0, 0, 0, |
| 549 | "lfsdinopl" , &pool_allocator_nointr, IPL_NONE); |
| 550 | pool_init(&lfs_inoext_pool, sizeof(struct lfs_inode_ext), 8, 0, 0, |
| 551 | "lfsinoextpl" , &pool_allocator_nointr, IPL_NONE); |
| 552 | pool_init(&lfs_lbnentry_pool, sizeof(struct lbnentry), 0, 0, 0, |
| 553 | "lfslbnpool" , &pool_allocator_nointr, IPL_NONE); |
| 554 | ulfs_init(); |
| 555 | |
| 556 | #ifdef DEBUG |
| 557 | memset(lfs_log, 0, sizeof(lfs_log)); |
| 558 | #endif |
| 559 | mutex_init(&lfs_lock, MUTEX_DEFAULT, IPL_NONE); |
| 560 | cv_init(&locked_queue_cv, "lfsbuf" ); |
| 561 | cv_init(&lfs_writing_cv, "lfsflush" ); |
| 562 | } |
| 563 | |
| 564 | void |
| 565 | lfs_reinit(void) |
| 566 | { |
| 567 | ulfs_reinit(); |
| 568 | } |
| 569 | |
| 570 | void |
| 571 | lfs_done(void) |
| 572 | { |
| 573 | ulfs_done(); |
| 574 | mutex_destroy(&lfs_lock); |
| 575 | cv_destroy(&locked_queue_cv); |
| 576 | cv_destroy(&lfs_writing_cv); |
| 577 | pool_destroy(&lfs_inode_pool); |
| 578 | pool_destroy(&lfs_dinode_pool); |
| 579 | pool_destroy(&lfs_inoext_pool); |
| 580 | pool_destroy(&lfs_lbnentry_pool); |
| 581 | malloc_type_detach(M_SEGMENT); |
| 582 | } |
| 583 | |
| 584 | /* |
| 585 | * Called by main() when ulfs is going to be mounted as root. |
| 586 | */ |
| 587 | int |
| 588 | lfs_mountroot(void) |
| 589 | { |
| 590 | extern struct vnode *rootvp; |
| 591 | struct lfs *fs = NULL; /* LFS */ |
| 592 | struct mount *mp; |
| 593 | struct lwp *l = curlwp; |
| 594 | struct ulfsmount *ump; |
| 595 | int error; |
| 596 | |
| 597 | if (device_class(root_device) != DV_DISK) |
| 598 | return (ENODEV); |
| 599 | |
| 600 | if (rootdev == NODEV) |
| 601 | return (ENODEV); |
| 602 | if ((error = vfs_rootmountalloc(MOUNT_LFS, "root_device" , &mp))) { |
| 603 | vrele(rootvp); |
| 604 | return (error); |
| 605 | } |
| 606 | if ((error = lfs_mountfs(rootvp, mp, l))) { |
| 607 | vfs_unbusy(mp, false, NULL); |
| 608 | vfs_destroy(mp); |
| 609 | return (error); |
| 610 | } |
| 611 | mountlist_append(mp); |
| 612 | ump = VFSTOULFS(mp); |
| 613 | fs = ump->um_lfs; |
| 614 | lfs_sb_setfsmnt(fs, mp->mnt_stat.f_mntonname); |
| 615 | (void)lfs_statvfs(mp, &mp->mnt_stat); |
| 616 | vfs_unbusy(mp, false, NULL); |
| 617 | setrootfstime((time_t)lfs_sb_gettstamp(VFSTOULFS(mp)->um_lfs)); |
| 618 | return (0); |
| 619 | } |
| 620 | |
| 621 | /* |
| 622 | * VFS Operations. |
| 623 | * |
| 624 | * mount system call |
| 625 | */ |
| 626 | int |
| 627 | lfs_mount(struct mount *mp, const char *path, void *data, size_t *data_len) |
| 628 | { |
| 629 | struct lwp *l = curlwp; |
| 630 | struct vnode *devvp; |
| 631 | struct ulfs_args *args = data; |
| 632 | struct ulfsmount *ump = NULL; |
| 633 | struct lfs *fs = NULL; /* LFS */ |
| 634 | int error = 0, update; |
| 635 | mode_t accessmode; |
| 636 | |
| 637 | if (args == NULL) |
| 638 | return EINVAL; |
| 639 | if (*data_len < sizeof *args) |
| 640 | return EINVAL; |
| 641 | |
| 642 | if (mp->mnt_flag & MNT_GETARGS) { |
| 643 | ump = VFSTOULFS(mp); |
| 644 | if (ump == NULL) |
| 645 | return EIO; |
| 646 | args->fspec = NULL; |
| 647 | *data_len = sizeof *args; |
| 648 | return 0; |
| 649 | } |
| 650 | |
| 651 | update = mp->mnt_flag & MNT_UPDATE; |
| 652 | |
| 653 | /* Check arguments */ |
| 654 | if (args->fspec != NULL) { |
| 655 | /* |
| 656 | * Look up the name and verify that it's sane. |
| 657 | */ |
| 658 | error = namei_simple_user(args->fspec, |
| 659 | NSM_FOLLOW_NOEMULROOT, &devvp); |
| 660 | if (error != 0) |
| 661 | return (error); |
| 662 | |
| 663 | if (!update) { |
| 664 | /* |
| 665 | * Be sure this is a valid block device |
| 666 | */ |
| 667 | if (devvp->v_type != VBLK) |
| 668 | error = ENOTBLK; |
| 669 | else if (bdevsw_lookup(devvp->v_rdev) == NULL) |
| 670 | error = ENXIO; |
| 671 | } else { |
| 672 | /* |
| 673 | * Be sure we're still naming the same device |
| 674 | * used for our initial mount |
| 675 | * |
| 676 | * XXX dholland 20151010: if namei gives us a |
| 677 | * different vnode for the same device, |
| 678 | * wouldn't it be better to use it going |
| 679 | * forward rather than ignore it in favor of |
| 680 | * the old one? |
| 681 | */ |
| 682 | ump = VFSTOULFS(mp); |
| 683 | fs = ump->um_lfs; |
| 684 | if (devvp != fs->lfs_devvp) { |
| 685 | if (devvp->v_rdev != fs->lfs_devvp->v_rdev) |
| 686 | error = EINVAL; |
| 687 | else { |
| 688 | vrele(devvp); |
| 689 | devvp = fs->lfs_devvp; |
| 690 | vref(devvp); |
| 691 | } |
| 692 | } |
| 693 | } |
| 694 | } else { |
| 695 | if (!update) { |
| 696 | /* New mounts must have a filename for the device */ |
| 697 | return (EINVAL); |
| 698 | } else { |
| 699 | /* Use the extant mount */ |
| 700 | ump = VFSTOULFS(mp); |
| 701 | fs = ump->um_lfs; |
| 702 | devvp = fs->lfs_devvp; |
| 703 | vref(devvp); |
| 704 | } |
| 705 | } |
| 706 | |
| 707 | |
| 708 | /* |
| 709 | * If mount by non-root, then verify that user has necessary |
| 710 | * permissions on the device. |
| 711 | */ |
| 712 | if (error == 0) { |
| 713 | accessmode = VREAD; |
| 714 | if (update ? |
| 715 | (mp->mnt_iflag & IMNT_WANTRDWR) != 0 : |
| 716 | (mp->mnt_flag & MNT_RDONLY) == 0) |
| 717 | accessmode |= VWRITE; |
| 718 | vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); |
| 719 | error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, |
| 720 | KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, |
| 721 | KAUTH_ARG(accessmode)); |
| 722 | VOP_UNLOCK(devvp); |
| 723 | } |
| 724 | |
| 725 | if (error) { |
| 726 | vrele(devvp); |
| 727 | return (error); |
| 728 | } |
| 729 | |
| 730 | if (!update) { |
| 731 | int flags; |
| 732 | |
| 733 | if (mp->mnt_flag & MNT_RDONLY) |
| 734 | flags = FREAD; |
| 735 | else |
| 736 | flags = FREAD|FWRITE; |
| 737 | vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); |
| 738 | error = VOP_OPEN(devvp, flags, FSCRED); |
| 739 | VOP_UNLOCK(devvp); |
| 740 | if (error) |
| 741 | goto fail; |
| 742 | error = lfs_mountfs(devvp, mp, l); /* LFS */ |
| 743 | if (error) { |
| 744 | vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); |
| 745 | (void)VOP_CLOSE(devvp, flags, NOCRED); |
| 746 | VOP_UNLOCK(devvp); |
| 747 | goto fail; |
| 748 | } |
| 749 | |
| 750 | ump = VFSTOULFS(mp); |
| 751 | fs = ump->um_lfs; |
| 752 | } else { |
| 753 | /* |
| 754 | * Update the mount. |
| 755 | */ |
| 756 | |
| 757 | /* |
| 758 | * The initial mount got a reference on this |
| 759 | * device, so drop the one obtained via |
| 760 | * namei(), above. |
| 761 | */ |
| 762 | vrele(devvp); |
| 763 | |
| 764 | ump = VFSTOULFS(mp); |
| 765 | fs = ump->um_lfs; |
| 766 | |
| 767 | if (fs->lfs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { |
| 768 | /* |
| 769 | * Changing from read/write to read-only. |
| 770 | * XXX: shouldn't we sync here? or does vfs do that? |
| 771 | */ |
| 772 | #ifdef LFS_QUOTA2 |
| 773 | /* XXX: quotas should remain on when readonly */ |
| 774 | if (fs->lfs_use_quota2) { |
| 775 | error = lfsquota2_umount(mp, 0); |
| 776 | if (error) { |
| 777 | return error; |
| 778 | } |
| 779 | } |
| 780 | #endif |
| 781 | } |
| 782 | |
| 783 | if (fs->lfs_ronly && (mp->mnt_iflag & IMNT_WANTRDWR)) { |
| 784 | /* |
| 785 | * Changing from read-only to read/write. |
| 786 | * Note in the superblocks that we're writing. |
| 787 | */ |
| 788 | |
| 789 | /* XXX: quotas should have been on even if readonly */ |
| 790 | if (fs->lfs_use_quota2) { |
| 791 | #ifdef LFS_QUOTA2 |
| 792 | error = lfs_quota2_mount(mp); |
| 793 | #else |
| 794 | uprintf("%s: no kernel support for this " |
| 795 | "filesystem's quotas\n" , |
| 796 | mp->mnt_stat.f_mntonname); |
| 797 | if (mp->mnt_flag & MNT_FORCE) { |
| 798 | uprintf("%s: mounting anyway; " |
| 799 | "fsck afterwards\n" , |
| 800 | mp->mnt_stat.f_mntonname); |
| 801 | } else { |
| 802 | error = EINVAL; |
| 803 | } |
| 804 | #endif |
| 805 | if (error) { |
| 806 | return error; |
| 807 | } |
| 808 | } |
| 809 | |
| 810 | fs->lfs_ronly = 0; |
| 811 | if (lfs_sb_getpflags(fs) & LFS_PF_CLEAN) { |
| 812 | lfs_sb_setpflags(fs, lfs_sb_getpflags(fs) & ~LFS_PF_CLEAN); |
| 813 | lfs_writesuper(fs, lfs_sb_getsboff(fs, 0)); |
| 814 | lfs_writesuper(fs, lfs_sb_getsboff(fs, 1)); |
| 815 | } |
| 816 | } |
| 817 | if (args->fspec == NULL) |
| 818 | return EINVAL; |
| 819 | } |
| 820 | |
| 821 | error = set_statvfs_info(path, UIO_USERSPACE, args->fspec, |
| 822 | UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); |
| 823 | if (error == 0) |
| 824 | lfs_sb_setfsmnt(fs, mp->mnt_stat.f_mntonname); |
| 825 | return error; |
| 826 | |
| 827 | fail: |
| 828 | vrele(devvp); |
| 829 | return (error); |
| 830 | } |
| 831 | |
| 832 | /* |
| 833 | * Helper for mountfs. Note that the fs pointer may be a dummy one |
| 834 | * pointing into a superblock buffer. (Which is gross; see below.) |
| 835 | */ |
| 836 | static int |
| 837 | lfs_checkmagic(struct lfs *fs) |
| 838 | { |
| 839 | switch (fs->lfs_dlfs_u.u_32.dlfs_magic) { |
| 840 | case LFS_MAGIC: |
| 841 | fs->lfs_is64 = false; |
| 842 | fs->lfs_dobyteswap = false; |
| 843 | break; |
| 844 | case LFS64_MAGIC: |
| 845 | fs->lfs_is64 = true; |
| 846 | fs->lfs_dobyteswap = false; |
| 847 | break; |
| 848 | #ifdef LFS_EI |
| 849 | case LFS_MAGIC_SWAPPED: |
| 850 | fs->lfs_is64 = false; |
| 851 | fs->lfs_dobyteswap = true; |
| 852 | break; |
| 853 | case LFS64_MAGIC_SWAPPED: |
| 854 | fs->lfs_is64 = true; |
| 855 | fs->lfs_dobyteswap = true; |
| 856 | break; |
| 857 | #endif |
| 858 | default: |
| 859 | /* XXX needs translation */ |
| 860 | return EINVAL; |
| 861 | } |
| 862 | return 0; |
| 863 | } |
| 864 | |
| 865 | /* |
| 866 | * Common code for mount and mountroot |
| 867 | * LFS specific |
| 868 | */ |
| 869 | int |
| 870 | lfs_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l) |
| 871 | { |
| 872 | struct lfs *primarysb, *altsb, *thesb; |
| 873 | struct buf *primarybuf, *altbuf; |
| 874 | struct lfs *fs; |
| 875 | struct ulfsmount *ump; |
| 876 | struct vnode *vp; |
| 877 | dev_t dev; |
| 878 | int error, i, ronly, fsbsize; |
| 879 | kauth_cred_t cred; |
| 880 | CLEANERINFO *cip; |
| 881 | SEGUSE *sup; |
| 882 | daddr_t sb_addr; |
| 883 | |
| 884 | cred = l ? l->l_cred : NOCRED; |
| 885 | |
| 886 | /* The superblock is supposed to be 512 bytes. */ |
| 887 | __CTASSERT(sizeof(struct dlfs) == DEV_BSIZE); |
| 888 | |
| 889 | /* |
| 890 | * Flush out any old buffers remaining from a previous use. |
| 891 | */ |
| 892 | vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); |
| 893 | error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); |
| 894 | VOP_UNLOCK(devvp); |
| 895 | if (error) |
| 896 | return (error); |
| 897 | |
| 898 | ronly = (mp->mnt_flag & MNT_RDONLY) != 0; |
| 899 | |
| 900 | /* Don't free random space on error. */ |
| 901 | primarybuf = NULL; |
| 902 | altbuf = NULL; |
| 903 | ump = NULL; |
| 904 | |
| 905 | sb_addr = LFS_LABELPAD / DEV_BSIZE; |
| 906 | while (1) { |
| 907 | /* |
| 908 | * Read in the superblock. |
| 909 | * |
| 910 | * Note that because LFS_SBPAD is substantially larger |
| 911 | * (8K) than the actual on-disk superblock (512 bytes) |
| 912 | * the buffer contains enough space to be used as a |
| 913 | * whole struct lfs (in-memory superblock) - we do this |
| 914 | * only so we can set and use the is64 and dobyteswap |
| 915 | * members. XXX this is gross and the logic here should |
| 916 | * be reworked. |
| 917 | */ |
| 918 | error = bread(devvp, sb_addr, LFS_SBPAD, 0, &primarybuf); |
| 919 | if (error) |
| 920 | goto out; |
| 921 | primarysb = (struct lfs *)primarybuf->b_data; |
| 922 | |
| 923 | /* Check the basics. */ |
| 924 | error = lfs_checkmagic(primarysb); |
| 925 | if (error) { |
| 926 | DLOG((DLOG_MOUNT, "lfs_mountfs: primary superblock wrong magic\n" )); |
| 927 | goto out; |
| 928 | } |
| 929 | if (lfs_sb_getbsize(primarysb) > MAXBSIZE || |
| 930 | lfs_sb_getversion(primarysb) > LFS_VERSION || |
| 931 | lfs_sb_getbsize(primarysb) < sizeof(struct dlfs)) { |
| 932 | DLOG((DLOG_MOUNT, "lfs_mountfs: primary superblock sanity failed\n" )); |
| 933 | /* XXX needs translation */ |
| 934 | error = EINVAL; |
| 935 | goto out; |
| 936 | } |
| 937 | if (lfs_sb_getinodefmt(primarysb) > LFS_MAXINODEFMT) { |
| 938 | DLOG((DLOG_MOUNT, "lfs_mountfs: unknown inode format %d\n" , |
| 939 | lfs_sb_getinodefmt(primarysb))); |
| 940 | error = EINVAL; |
| 941 | goto out; |
| 942 | } |
| 943 | |
| 944 | if (lfs_sb_getversion(primarysb) == 1) |
| 945 | fsbsize = DEV_BSIZE; |
| 946 | else { |
| 947 | fsbsize = 1 << lfs_sb_getffshift(primarysb); |
| 948 | /* |
| 949 | * Could be, if the frag size is large enough, that we |
| 950 | * don't have the "real" primary superblock. If that's |
| 951 | * the case, get the real one, and try again. |
| 952 | */ |
| 953 | if (sb_addr != (lfs_sb_getsboff(primarysb, 0) << (lfs_sb_getffshift(primarysb) - DEV_BSHIFT))) { |
| 954 | DLOG((DLOG_MOUNT, "lfs_mountfs: sb daddr" |
| 955 | " 0x%llx is not right, trying 0x%llx\n" , |
| 956 | (long long)sb_addr, |
| 957 | (long long)(lfs_sb_getsboff(primarysb, 0) << (lfs_sb_getffshift(primarysb) - DEV_BSHIFT)))); |
| 958 | sb_addr = lfs_sb_getsboff(primarysb, 0) << (lfs_sb_getffshift(primarysb) - DEV_BSHIFT); |
| 959 | brelse(primarybuf, BC_INVAL); |
| 960 | continue; |
| 961 | } |
| 962 | } |
| 963 | break; |
| 964 | } |
| 965 | |
| 966 | /* |
| 967 | * Check the second superblock to see which is newer; then mount |
| 968 | * using the older of the two. This is necessary to ensure that |
| 969 | * the filesystem is valid if it was not unmounted cleanly. |
| 970 | */ |
| 971 | |
| 972 | if (lfs_sb_getsboff(primarysb, 1) && |
| 973 | lfs_sb_getsboff(primarysb, 1) - LFS_LABELPAD / fsbsize > LFS_SBPAD / fsbsize) |
| 974 | { |
| 975 | error = bread(devvp, lfs_sb_getsboff(primarysb, 1) * (fsbsize / DEV_BSIZE), |
| 976 | LFS_SBPAD, 0, &altbuf); |
| 977 | if (error) |
| 978 | goto out; |
| 979 | altsb = (struct lfs *)altbuf->b_data; |
| 980 | |
| 981 | /* |
| 982 | * Note: this used to do the sanity check only if the |
| 983 | * timestamp/serial comparison required use of altsb; |
| 984 | * this way is less tolerant, but if altsb is corrupted |
| 985 | * enough that the magic number, version, and blocksize |
| 986 | * are bogus, why would the timestamp or serial fields |
| 987 | * mean anything either? If this kind of thing happens, |
| 988 | * you need to fsck anyway. |
| 989 | */ |
| 990 | |
| 991 | error = lfs_checkmagic(altsb); |
| 992 | if (error) |
| 993 | goto out; |
| 994 | |
| 995 | /* Check the basics. */ |
| 996 | if (lfs_sb_getbsize(altsb) > MAXBSIZE || |
| 997 | lfs_sb_getversion(altsb) > LFS_VERSION || |
| 998 | lfs_sb_getbsize(altsb) < sizeof(struct dlfs)) { |
| 999 | DLOG((DLOG_MOUNT, "lfs_mountfs: alt superblock" |
| 1000 | " sanity failed\n" )); |
| 1001 | error = EINVAL; /* XXX needs translation */ |
| 1002 | goto out; |
| 1003 | } |
| 1004 | |
| 1005 | if (lfs_sb_getversion(primarysb) == 1) { |
| 1006 | /* 1s resolution comparison */ |
| 1007 | if (lfs_sb_gettstamp(altsb) < lfs_sb_gettstamp(primarysb)) |
| 1008 | thesb = altsb; |
| 1009 | else |
| 1010 | thesb = primarysb; |
| 1011 | } else { |
| 1012 | /* monotonic infinite-resolution comparison */ |
| 1013 | if (lfs_sb_getserial(altsb) < lfs_sb_getserial(primarysb)) |
| 1014 | thesb = altsb; |
| 1015 | else |
| 1016 | thesb = primarysb; |
| 1017 | } |
| 1018 | } else { |
| 1019 | DLOG((DLOG_MOUNT, "lfs_mountfs: invalid alt superblock location" |
| 1020 | " daddr=0x%x\n" , lfs_sb_getsboff(primarysb, 1))); |
| 1021 | error = EINVAL; |
| 1022 | goto out; |
| 1023 | } |
| 1024 | |
| 1025 | /* |
| 1026 | * Allocate the mount structure, copy the superblock into it. |
| 1027 | * Note that the 32-bit and 64-bit superblocks are the same size. |
| 1028 | */ |
| 1029 | fs = kmem_zalloc(sizeof(struct lfs), KM_SLEEP); |
| 1030 | memcpy(&fs->lfs_dlfs_u.u_32, &thesb->lfs_dlfs_u.u_32, |
| 1031 | sizeof(struct dlfs)); |
| 1032 | fs->lfs_is64 = thesb->lfs_is64; |
| 1033 | fs->lfs_dobyteswap = thesb->lfs_dobyteswap; |
| 1034 | fs->lfs_hasolddirfmt = false; /* set for real below */ |
| 1035 | |
| 1036 | /* Compatibility */ |
| 1037 | if (lfs_sb_getversion(fs) < 2) { |
| 1038 | lfs_sb_setsumsize(fs, LFS_V1_SUMMARY_SIZE); |
| 1039 | lfs_sb_setibsize(fs, lfs_sb_getbsize(fs)); |
| 1040 | lfs_sb_sets0addr(fs, lfs_sb_getsboff(fs, 0)); |
| 1041 | lfs_sb_settstamp(fs, lfs_sb_getotstamp(fs)); |
| 1042 | lfs_sb_setfsbtodb(fs, 0); |
| 1043 | } |
| 1044 | if (lfs_sb_getresvseg(fs) == 0) |
| 1045 | lfs_sb_setresvseg(fs, MIN(lfs_sb_getminfreeseg(fs) - 1, \ |
| 1046 | MAX(MIN_RESV_SEGS, lfs_sb_getminfreeseg(fs) / 2 + 1))); |
| 1047 | |
| 1048 | /* |
| 1049 | * If we aren't going to be able to write meaningfully to this |
| 1050 | * filesystem, and were not mounted readonly, bomb out now. |
| 1051 | */ |
| 1052 | if (lfs_fsbtob(fs, LFS_NRESERVE(fs)) > LFS_MAX_BYTES && !ronly) { |
| 1053 | DLOG((DLOG_MOUNT, "lfs_mount: to mount this filesystem read/write," |
| 1054 | " we need BUFPAGES >= %lld\n" , |
| 1055 | (long long)((bufmem_hiwater / bufmem_lowater) * |
| 1056 | LFS_INVERSE_MAX_BYTES( |
| 1057 | lfs_fsbtob(fs, LFS_NRESERVE(fs))) >> PAGE_SHIFT))); |
| 1058 | kmem_free(fs, sizeof(struct lfs)); |
| 1059 | error = EFBIG; /* XXX needs translation */ |
| 1060 | goto out; |
| 1061 | } |
| 1062 | |
| 1063 | /* Before rolling forward, lock so vget will sleep for other procs */ |
| 1064 | if (l != NULL) { |
| 1065 | fs->lfs_flags = LFS_NOTYET; |
| 1066 | fs->lfs_rfpid = l->l_proc->p_pid; |
| 1067 | } |
| 1068 | |
| 1069 | ump = kmem_zalloc(sizeof(*ump), KM_SLEEP); |
| 1070 | ump->um_lfs = fs; |
| 1071 | ump->um_fstype = fs->lfs_is64 ? ULFS2 : ULFS1; |
| 1072 | /* ump->um_cleaner_thread = NULL; */ |
| 1073 | brelse(primarybuf, BC_INVAL); |
| 1074 | brelse(altbuf, BC_INVAL); |
| 1075 | primarybuf = NULL; |
| 1076 | altbuf = NULL; |
| 1077 | |
| 1078 | |
| 1079 | /* Set up the I/O information */ |
| 1080 | fs->lfs_devbsize = DEV_BSIZE; |
| 1081 | fs->lfs_iocount = 0; |
| 1082 | fs->lfs_diropwait = 0; |
| 1083 | fs->lfs_activesb = 0; |
| 1084 | lfs_sb_setuinodes(fs, 0); |
| 1085 | fs->lfs_ravail = 0; |
| 1086 | fs->lfs_favail = 0; |
| 1087 | fs->lfs_sbactive = 0; |
| 1088 | |
| 1089 | /* Set up the ifile and lock aflags */ |
| 1090 | fs->lfs_doifile = 0; |
| 1091 | fs->lfs_writer = 0; |
| 1092 | fs->lfs_dirops = 0; |
| 1093 | fs->lfs_nadirop = 0; |
| 1094 | fs->lfs_seglock = 0; |
| 1095 | fs->lfs_pdflush = 0; |
| 1096 | fs->lfs_sleepers = 0; |
| 1097 | fs->lfs_pages = 0; |
| 1098 | rw_init(&fs->lfs_fraglock); |
| 1099 | rw_init(&fs->lfs_iflock); |
| 1100 | cv_init(&fs->lfs_stopcv, "lfsstop" ); |
| 1101 | |
| 1102 | /* Set the file system readonly/modify bits. */ |
| 1103 | fs->lfs_ronly = ronly; |
| 1104 | if (ronly == 0) |
| 1105 | fs->lfs_fmod = 1; |
| 1106 | |
| 1107 | /* Device we're using */ |
| 1108 | dev = devvp->v_rdev; |
| 1109 | fs->lfs_dev = dev; |
| 1110 | fs->lfs_devvp = devvp; |
| 1111 | |
| 1112 | /* ulfs-level information */ |
| 1113 | fs->um_flags = 0; |
| 1114 | fs->um_bptrtodb = lfs_sb_getffshift(fs) - DEV_BSHIFT; |
| 1115 | fs->um_seqinc = lfs_sb_getfrag(fs); |
| 1116 | fs->um_nindir = lfs_sb_getnindir(fs); |
| 1117 | fs->um_lognindir = ffs(lfs_sb_getnindir(fs)) - 1; |
| 1118 | fs->um_maxsymlinklen = lfs_sb_getmaxsymlinklen(fs); |
| 1119 | fs->um_dirblksiz = LFS_DIRBLKSIZ; |
| 1120 | fs->um_maxfilesize = lfs_sb_getmaxfilesize(fs); |
| 1121 | |
| 1122 | /* quota stuff */ |
| 1123 | /* XXX: these need to come from the on-disk superblock to be used */ |
| 1124 | fs->lfs_use_quota2 = 0; |
| 1125 | fs->lfs_quota_magic = 0; |
| 1126 | fs->lfs_quota_flags = 0; |
| 1127 | fs->lfs_quotaino[0] = 0; |
| 1128 | fs->lfs_quotaino[1] = 0; |
| 1129 | |
| 1130 | /* Initialize the mount structure. */ |
| 1131 | mp->mnt_data = ump; |
| 1132 | mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; |
| 1133 | mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_LFS); |
| 1134 | mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; |
| 1135 | mp->mnt_stat.f_namemax = LFS_MAXNAMLEN; |
| 1136 | mp->mnt_stat.f_iosize = lfs_sb_getbsize(fs); |
| 1137 | mp->mnt_flag |= MNT_LOCAL; |
| 1138 | mp->mnt_fs_bshift = lfs_sb_getbshift(fs); |
| 1139 | if (fs->um_maxsymlinklen > 0) |
| 1140 | mp->mnt_iflag |= IMNT_DTYPE; |
| 1141 | else |
| 1142 | fs->lfs_hasolddirfmt = true; |
| 1143 | |
| 1144 | ump->um_mountp = mp; |
| 1145 | for (i = 0; i < ULFS_MAXQUOTAS; i++) |
| 1146 | ump->um_quotas[i] = NULLVP; |
| 1147 | spec_node_setmountedfs(devvp, mp); |
| 1148 | |
| 1149 | /* Set up reserved memory for pageout */ |
| 1150 | lfs_setup_resblks(fs); |
| 1151 | /* Set up vdirop tailq */ |
| 1152 | TAILQ_INIT(&fs->lfs_dchainhd); |
| 1153 | /* and paging tailq */ |
| 1154 | TAILQ_INIT(&fs->lfs_pchainhd); |
| 1155 | /* and delayed segment accounting for truncation list */ |
| 1156 | LIST_INIT(&fs->lfs_segdhd); |
| 1157 | |
| 1158 | /* |
| 1159 | * We use the ifile vnode for almost every operation. Instead of |
| 1160 | * retrieving it from the hash table each time we retrieve it here, |
| 1161 | * artificially increment the reference count and keep a pointer |
| 1162 | * to it in the incore copy of the superblock. |
| 1163 | */ |
| 1164 | if ((error = VFS_VGET(mp, LFS_IFILE_INUM, &vp)) != 0) { |
| 1165 | DLOG((DLOG_MOUNT, "lfs_mountfs: ifile vget failed, error=%d\n" , error)); |
| 1166 | goto out; |
| 1167 | } |
| 1168 | fs->lfs_ivnode = vp; |
| 1169 | vref(vp); |
| 1170 | |
| 1171 | /* Set up inode bitmap and order free list */ |
| 1172 | lfs_order_freelist(fs); |
| 1173 | |
| 1174 | /* Set up segment usage flags for the autocleaner. */ |
| 1175 | fs->lfs_nactive = 0; |
| 1176 | fs->lfs_suflags = malloc(2 * sizeof(u_int32_t *), |
| 1177 | M_SEGMENT, M_WAITOK); |
| 1178 | fs->lfs_suflags[0] = malloc(lfs_sb_getnseg(fs) * sizeof(u_int32_t), |
| 1179 | M_SEGMENT, M_WAITOK); |
| 1180 | fs->lfs_suflags[1] = malloc(lfs_sb_getnseg(fs) * sizeof(u_int32_t), |
| 1181 | M_SEGMENT, M_WAITOK); |
| 1182 | memset(fs->lfs_suflags[1], 0, lfs_sb_getnseg(fs) * sizeof(u_int32_t)); |
| 1183 | for (i = 0; i < lfs_sb_getnseg(fs); i++) { |
| 1184 | int changed; |
| 1185 | struct buf *bp; |
| 1186 | |
| 1187 | LFS_SEGENTRY(sup, fs, i, bp); |
| 1188 | changed = 0; |
| 1189 | if (!ronly) { |
| 1190 | if (sup->su_nbytes == 0 && |
| 1191 | !(sup->su_flags & SEGUSE_EMPTY)) { |
| 1192 | sup->su_flags |= SEGUSE_EMPTY; |
| 1193 | ++changed; |
| 1194 | } else if (!(sup->su_nbytes == 0) && |
| 1195 | (sup->su_flags & SEGUSE_EMPTY)) { |
| 1196 | sup->su_flags &= ~SEGUSE_EMPTY; |
| 1197 | ++changed; |
| 1198 | } |
| 1199 | if (sup->su_flags & (SEGUSE_ACTIVE|SEGUSE_INVAL)) { |
| 1200 | sup->su_flags &= ~(SEGUSE_ACTIVE|SEGUSE_INVAL); |
| 1201 | ++changed; |
| 1202 | } |
| 1203 | } |
| 1204 | fs->lfs_suflags[0][i] = sup->su_flags; |
| 1205 | if (changed) |
| 1206 | LFS_WRITESEGENTRY(sup, fs, i, bp); |
| 1207 | else |
| 1208 | brelse(bp, 0); |
| 1209 | } |
| 1210 | |
| 1211 | /* |
| 1212 | * XXX: if the fs has quotas, quotas should be on even if |
| 1213 | * readonly. Otherwise you can't query the quota info! |
| 1214 | * However, that's not how the quota2 code got written and I |
| 1215 | * don't know if it'll behave itself if enabled while |
| 1216 | * readonly, so for now use the same enable logic as ffs. |
| 1217 | * |
| 1218 | * XXX: also, if you use the -f behavior allowed here (and |
| 1219 | * equivalently above for remount) it will corrupt the fs. It |
| 1220 | * ought not to allow that. It should allow mounting readonly |
| 1221 | * if there are quotas and the kernel doesn't have the quota |
| 1222 | * code, but only readonly. |
| 1223 | * |
| 1224 | * XXX: and if you use the -f behavior allowed here it will |
| 1225 | * likely crash at unmount time (or remount time) because we |
| 1226 | * think quotas are active. |
| 1227 | * |
| 1228 | * Although none of this applies until there's a way to set |
| 1229 | * lfs_use_quota2 and have quotas in the fs at all. |
| 1230 | */ |
| 1231 | if (!ronly && fs->lfs_use_quota2) { |
| 1232 | #ifdef LFS_QUOTA2 |
| 1233 | error = lfs_quota2_mount(mp); |
| 1234 | #else |
| 1235 | uprintf("%s: no kernel support for this filesystem's quotas\n" , |
| 1236 | mp->mnt_stat.f_mntonname); |
| 1237 | if (mp->mnt_flag & MNT_FORCE) { |
| 1238 | uprintf("%s: mounting anyway; fsck afterwards\n" , |
| 1239 | mp->mnt_stat.f_mntonname); |
| 1240 | } else { |
| 1241 | error = EINVAL; |
| 1242 | } |
| 1243 | #endif |
| 1244 | if (error) { |
| 1245 | /* XXX XXX must clean up the stuff immediately above */ |
| 1246 | printf("lfs_mountfs: sorry, leaking some memory\n" ); |
| 1247 | goto out; |
| 1248 | } |
| 1249 | } |
| 1250 | |
| 1251 | #ifdef LFS_KERNEL_RFW |
| 1252 | lfs_roll_forward(fs, mp, l); |
| 1253 | #endif |
| 1254 | |
| 1255 | /* If writing, sb is not clean; record in case of immediate crash */ |
| 1256 | if (!fs->lfs_ronly) { |
| 1257 | lfs_sb_setpflags(fs, lfs_sb_getpflags(fs) & ~LFS_PF_CLEAN); |
| 1258 | lfs_writesuper(fs, lfs_sb_getsboff(fs, 0)); |
| 1259 | lfs_writesuper(fs, lfs_sb_getsboff(fs, 1)); |
| 1260 | } |
| 1261 | |
| 1262 | /* Allow vget now that roll-forward is complete */ |
| 1263 | fs->lfs_flags &= ~(LFS_NOTYET); |
| 1264 | wakeup(&fs->lfs_flags); |
| 1265 | |
| 1266 | /* |
| 1267 | * Initialize the ifile cleaner info with information from |
| 1268 | * the superblock. |
| 1269 | */ |
| 1270 | { |
| 1271 | struct buf *bp; |
| 1272 | |
| 1273 | LFS_CLEANERINFO(cip, fs, bp); |
| 1274 | lfs_ci_setclean(fs, cip, lfs_sb_getnclean(fs)); |
| 1275 | lfs_ci_setdirty(fs, cip, lfs_sb_getnseg(fs) - lfs_sb_getnclean(fs)); |
| 1276 | lfs_ci_setavail(fs, cip, lfs_sb_getavail(fs)); |
| 1277 | lfs_ci_setbfree(fs, cip, lfs_sb_getbfree(fs)); |
| 1278 | (void) LFS_BWRITE_LOG(bp); /* Ifile */ |
| 1279 | } |
| 1280 | |
| 1281 | /* |
| 1282 | * Mark the current segment as ACTIVE, since we're going to |
| 1283 | * be writing to it. |
| 1284 | */ |
| 1285 | { |
| 1286 | struct buf *bp; |
| 1287 | |
| 1288 | LFS_SEGENTRY(sup, fs, lfs_dtosn(fs, lfs_sb_getoffset(fs)), bp); |
| 1289 | sup->su_flags |= SEGUSE_DIRTY | SEGUSE_ACTIVE; |
| 1290 | fs->lfs_nactive++; |
| 1291 | LFS_WRITESEGENTRY(sup, fs, lfs_dtosn(fs, lfs_sb_getoffset(fs)), bp); /* Ifile */ |
| 1292 | } |
| 1293 | |
| 1294 | /* Now that roll-forward is done, unlock the Ifile */ |
| 1295 | vput(vp); |
| 1296 | |
| 1297 | /* Start the pagedaemon-anticipating daemon */ |
| 1298 | mutex_enter(&lfs_lock); |
| 1299 | if (lfs_writer_daemon == 0 && lfs_writer_lid == 0 && |
| 1300 | kthread_create(PRI_BIO, 0, NULL, |
| 1301 | lfs_writerd, NULL, NULL, "lfs_writer" ) != 0) |
| 1302 | panic("fork lfs_writer" ); |
| 1303 | mutex_exit(&lfs_lock); |
| 1304 | |
| 1305 | printf("WARNING: the log-structured file system is experimental\n" |
| 1306 | "WARNING: it may cause system crashes and/or corrupt data\n" ); |
| 1307 | |
| 1308 | return (0); |
| 1309 | |
| 1310 | out: |
| 1311 | if (primarybuf) |
| 1312 | brelse(primarybuf, BC_INVAL); |
| 1313 | if (altbuf) |
| 1314 | brelse(altbuf, BC_INVAL); |
| 1315 | if (ump) { |
| 1316 | kmem_free(ump->um_lfs, sizeof(struct lfs)); |
| 1317 | kmem_free(ump, sizeof(*ump)); |
| 1318 | mp->mnt_data = NULL; |
| 1319 | } |
| 1320 | |
| 1321 | return (error); |
| 1322 | } |
| 1323 | |
| 1324 | /* |
| 1325 | * unmount system call |
| 1326 | */ |
| 1327 | int |
| 1328 | lfs_unmount(struct mount *mp, int mntflags) |
| 1329 | { |
| 1330 | struct lwp *l = curlwp; |
| 1331 | struct ulfsmount *ump; |
| 1332 | struct lfs *fs; |
| 1333 | int error, flags, ronly; |
| 1334 | vnode_t *vp; |
| 1335 | |
| 1336 | flags = 0; |
| 1337 | if (mntflags & MNT_FORCE) |
| 1338 | flags |= FORCECLOSE; |
| 1339 | |
| 1340 | ump = VFSTOULFS(mp); |
| 1341 | fs = ump->um_lfs; |
| 1342 | |
| 1343 | /* Two checkpoints */ |
| 1344 | lfs_segwrite(mp, SEGM_CKP | SEGM_SYNC); |
| 1345 | lfs_segwrite(mp, SEGM_CKP | SEGM_SYNC); |
| 1346 | |
| 1347 | /* wake up the cleaner so it can die */ |
| 1348 | /* XXX: shouldn't this be *after* the error cases below? */ |
| 1349 | lfs_wakeup_cleaner(fs); |
| 1350 | mutex_enter(&lfs_lock); |
| 1351 | while (fs->lfs_sleepers) |
| 1352 | mtsleep(&fs->lfs_sleepers, PRIBIO + 1, "lfs_sleepers" , 0, |
| 1353 | &lfs_lock); |
| 1354 | mutex_exit(&lfs_lock); |
| 1355 | |
| 1356 | #ifdef LFS_EXTATTR |
| 1357 | if (ump->um_fstype == ULFS1) { |
| 1358 | if (ump->um_extattr.uepm_flags & ULFS_EXTATTR_UEPM_STARTED) { |
| 1359 | ulfs_extattr_stop(mp, curlwp); |
| 1360 | } |
| 1361 | if (ump->um_extattr.uepm_flags & ULFS_EXTATTR_UEPM_INITIALIZED) { |
| 1362 | ulfs_extattr_uepm_destroy(&ump->um_extattr); |
| 1363 | mp->mnt_flag &= ~MNT_EXTATTR; |
| 1364 | } |
| 1365 | } |
| 1366 | #endif |
| 1367 | #ifdef LFS_QUOTA |
| 1368 | if ((error = lfsquota1_umount(mp, flags)) != 0) |
| 1369 | return (error); |
| 1370 | #endif |
| 1371 | #ifdef LFS_QUOTA2 |
| 1372 | if ((error = lfsquota2_umount(mp, flags)) != 0) |
| 1373 | return (error); |
| 1374 | #endif |
| 1375 | if ((error = vflush(mp, fs->lfs_ivnode, flags)) != 0) |
| 1376 | return (error); |
| 1377 | if ((error = VFS_SYNC(mp, 1, l->l_cred)) != 0) |
| 1378 | return (error); |
| 1379 | vp = fs->lfs_ivnode; |
| 1380 | mutex_enter(vp->v_interlock); |
| 1381 | if (LIST_FIRST(&vp->v_dirtyblkhd)) |
| 1382 | panic("lfs_unmount: still dirty blocks on ifile vnode" ); |
| 1383 | mutex_exit(vp->v_interlock); |
| 1384 | |
| 1385 | /* Explicitly write the superblock, to update serial and pflags */ |
| 1386 | lfs_sb_setpflags(fs, lfs_sb_getpflags(fs) | LFS_PF_CLEAN); |
| 1387 | lfs_writesuper(fs, lfs_sb_getsboff(fs, 0)); |
| 1388 | lfs_writesuper(fs, lfs_sb_getsboff(fs, 1)); |
| 1389 | mutex_enter(&lfs_lock); |
| 1390 | while (fs->lfs_iocount) |
| 1391 | mtsleep(&fs->lfs_iocount, PRIBIO + 1, "lfs_umount" , 0, |
| 1392 | &lfs_lock); |
| 1393 | mutex_exit(&lfs_lock); |
| 1394 | |
| 1395 | /* Finish with the Ifile, now that we're done with it */ |
| 1396 | vgone(fs->lfs_ivnode); |
| 1397 | |
| 1398 | ronly = !fs->lfs_ronly; |
| 1399 | if (fs->lfs_devvp->v_type != VBAD) |
| 1400 | spec_node_setmountedfs(fs->lfs_devvp, NULL); |
| 1401 | vn_lock(fs->lfs_devvp, LK_EXCLUSIVE | LK_RETRY); |
| 1402 | error = VOP_CLOSE(fs->lfs_devvp, |
| 1403 | ronly ? FREAD : FREAD|FWRITE, NOCRED); |
| 1404 | vput(fs->lfs_devvp); |
| 1405 | |
| 1406 | /* Complain about page leakage */ |
| 1407 | if (fs->lfs_pages > 0) |
| 1408 | printf("lfs_unmount: still claim %d pages (%d in subsystem)\n" , |
| 1409 | fs->lfs_pages, lfs_subsys_pages); |
| 1410 | |
| 1411 | /* Free per-mount data structures */ |
| 1412 | free(fs->lfs_ino_bitmap, M_SEGMENT); |
| 1413 | free(fs->lfs_suflags[0], M_SEGMENT); |
| 1414 | free(fs->lfs_suflags[1], M_SEGMENT); |
| 1415 | free(fs->lfs_suflags, M_SEGMENT); |
| 1416 | lfs_free_resblks(fs); |
| 1417 | cv_destroy(&fs->lfs_stopcv); |
| 1418 | rw_destroy(&fs->lfs_fraglock); |
| 1419 | rw_destroy(&fs->lfs_iflock); |
| 1420 | |
| 1421 | kmem_free(fs, sizeof(struct lfs)); |
| 1422 | kmem_free(ump, sizeof(*ump)); |
| 1423 | |
| 1424 | mp->mnt_data = NULL; |
| 1425 | mp->mnt_flag &= ~MNT_LOCAL; |
| 1426 | return (error); |
| 1427 | } |
| 1428 | |
| 1429 | /* |
| 1430 | * Get file system statistics. |
| 1431 | * |
| 1432 | * NB: We don't lock to access the superblock here, because it's not |
| 1433 | * really that important if we get it wrong. |
| 1434 | */ |
| 1435 | int |
| 1436 | lfs_statvfs(struct mount *mp, struct statvfs *sbp) |
| 1437 | { |
| 1438 | struct lfs *fs; |
| 1439 | struct ulfsmount *ump; |
| 1440 | |
| 1441 | ump = VFSTOULFS(mp); |
| 1442 | fs = ump->um_lfs; |
| 1443 | |
| 1444 | sbp->f_bsize = lfs_sb_getbsize(fs); |
| 1445 | sbp->f_frsize = lfs_sb_getfsize(fs); |
| 1446 | sbp->f_iosize = lfs_sb_getbsize(fs); |
| 1447 | sbp->f_blocks = LFS_EST_NONMETA(fs) - VTOI(fs->lfs_ivnode)->i_lfs_effnblks; |
| 1448 | |
| 1449 | sbp->f_bfree = LFS_EST_BFREE(fs); |
| 1450 | /* |
| 1451 | * XXX this should be lfs_sb_getsize (measured in frags) |
| 1452 | * rather than dsize (measured in diskblocks). However, |
| 1453 | * getsize needs a format version check (for version 1 it |
| 1454 | * needs to be blockstofrags'd) so for the moment I'm going to |
| 1455 | * leave this... it won't fire wrongly as frags are at least |
| 1456 | * as big as diskblocks. |
| 1457 | */ |
| 1458 | KASSERT(sbp->f_bfree <= lfs_sb_getdsize(fs)); |
| 1459 | #if 0 |
| 1460 | if (sbp->f_bfree < 0) |
| 1461 | sbp->f_bfree = 0; |
| 1462 | #endif |
| 1463 | |
| 1464 | sbp->f_bresvd = LFS_EST_RSVD(fs); |
| 1465 | if (sbp->f_bfree > sbp->f_bresvd) |
| 1466 | sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd; |
| 1467 | else |
| 1468 | sbp->f_bavail = 0; |
| 1469 | |
| 1470 | /* XXX: huh? - dholland 20150728 */ |
| 1471 | sbp->f_files = lfs_sb_getbfree(fs) / lfs_btofsb(fs, lfs_sb_getibsize(fs)) |
| 1472 | * LFS_INOPB(fs); |
| 1473 | sbp->f_ffree = sbp->f_files - lfs_sb_getnfiles(fs); |
| 1474 | sbp->f_favail = sbp->f_ffree; |
| 1475 | sbp->f_fresvd = 0; |
| 1476 | copy_statvfs_info(sbp, mp); |
| 1477 | return (0); |
| 1478 | } |
| 1479 | |
| 1480 | /* |
| 1481 | * Go through the disk queues to initiate sandbagged IO; |
| 1482 | * go through the inodes to write those that have been modified; |
| 1483 | * initiate the writing of the super block if it has been modified. |
| 1484 | * |
| 1485 | * Note: we are always called with the filesystem marked `MPBUSY'. |
| 1486 | */ |
| 1487 | int |
| 1488 | lfs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) |
| 1489 | { |
| 1490 | int error; |
| 1491 | struct lfs *fs; |
| 1492 | |
| 1493 | fs = VFSTOULFS(mp)->um_lfs; |
| 1494 | if (fs->lfs_ronly) |
| 1495 | return 0; |
| 1496 | |
| 1497 | /* Snapshots should not hose the syncer */ |
| 1498 | /* |
| 1499 | * XXX Sync can block here anyway, since we don't have a very |
| 1500 | * XXX good idea of how much data is pending. If it's more |
| 1501 | * XXX than a segment and lfs_nextseg is close to the end of |
| 1502 | * XXX the log, we'll likely block. |
| 1503 | */ |
| 1504 | mutex_enter(&lfs_lock); |
| 1505 | if (fs->lfs_nowrap && lfs_sb_getnextseg(fs) < lfs_sb_getcurseg(fs)) { |
| 1506 | mutex_exit(&lfs_lock); |
| 1507 | return 0; |
| 1508 | } |
| 1509 | mutex_exit(&lfs_lock); |
| 1510 | |
| 1511 | lfs_writer_enter(fs, "lfs_dirops" ); |
| 1512 | |
| 1513 | /* All syncs must be checkpoints until roll-forward is implemented. */ |
| 1514 | DLOG((DLOG_FLUSH, "lfs_sync at 0x%jx\n" , |
| 1515 | (uintmax_t)lfs_sb_getoffset(fs))); |
| 1516 | error = lfs_segwrite(mp, SEGM_CKP | (waitfor ? SEGM_SYNC : 0)); |
| 1517 | lfs_writer_leave(fs); |
| 1518 | #ifdef LFS_QUOTA |
| 1519 | lfs_qsync(mp); |
| 1520 | #endif |
| 1521 | return (error); |
| 1522 | } |
| 1523 | |
| 1524 | /* |
| 1525 | * Look up an LFS dinode number to find its incore vnode. If not already |
| 1526 | * in core, read it in from the specified device. Return the inode locked. |
| 1527 | * Detection and handling of mount points must be done by the calling routine. |
| 1528 | */ |
| 1529 | int |
| 1530 | lfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) |
| 1531 | { |
| 1532 | int error; |
| 1533 | |
| 1534 | error = vcache_get(mp, &ino, sizeof(ino), vpp); |
| 1535 | if (error) |
| 1536 | return error; |
| 1537 | error = vn_lock(*vpp, LK_EXCLUSIVE); |
| 1538 | if (error) { |
| 1539 | vrele(*vpp); |
| 1540 | *vpp = NULL; |
| 1541 | return error; |
| 1542 | } |
| 1543 | |
| 1544 | return 0; |
| 1545 | } |
| 1546 | |
| 1547 | /* |
| 1548 | * Create a new vnode/inode pair and initialize what fields we can. |
| 1549 | */ |
| 1550 | static void |
| 1551 | lfs_init_vnode(struct ulfsmount *ump, ino_t ino, struct vnode *vp) |
| 1552 | { |
| 1553 | struct lfs *fs = ump->um_lfs; |
| 1554 | struct inode *ip; |
| 1555 | union lfs_dinode *dp; |
| 1556 | |
| 1557 | ASSERT_NO_SEGLOCK(fs); |
| 1558 | |
| 1559 | /* Initialize the inode. */ |
| 1560 | ip = pool_get(&lfs_inode_pool, PR_WAITOK); |
| 1561 | memset(ip, 0, sizeof(*ip)); |
| 1562 | dp = pool_get(&lfs_dinode_pool, PR_WAITOK); |
| 1563 | memset(dp, 0, sizeof(*dp)); |
| 1564 | ip->inode_ext.lfs = pool_get(&lfs_inoext_pool, PR_WAITOK); |
| 1565 | memset(ip->inode_ext.lfs, 0, sizeof(*ip->inode_ext.lfs)); |
| 1566 | ip->i_din = dp; |
| 1567 | ip->i_ump = ump; |
| 1568 | ip->i_vnode = vp; |
| 1569 | ip->i_dev = fs->lfs_dev; |
| 1570 | lfs_dino_setinumber(fs, dp, ino); |
| 1571 | ip->i_number = ino; |
| 1572 | ip->i_lfs = fs; |
| 1573 | ip->i_lfs_effnblks = 0; |
| 1574 | SPLAY_INIT(&ip->i_lfs_lbtree); |
| 1575 | ip->i_lfs_nbtree = 0; |
| 1576 | LIST_INIT(&ip->i_lfs_segdhd); |
| 1577 | |
| 1578 | vp->v_tag = VT_LFS; |
| 1579 | vp->v_op = lfs_vnodeop_p; |
| 1580 | vp->v_data = ip; |
| 1581 | } |
| 1582 | |
| 1583 | /* |
| 1584 | * Undo lfs_init_vnode(). |
| 1585 | */ |
| 1586 | static void |
| 1587 | lfs_deinit_vnode(struct ulfsmount *ump, struct vnode *vp) |
| 1588 | { |
| 1589 | struct inode *ip = VTOI(vp); |
| 1590 | |
| 1591 | pool_put(&lfs_inoext_pool, ip->inode_ext.lfs); |
| 1592 | pool_put(&lfs_dinode_pool, ip->i_din); |
| 1593 | pool_put(&lfs_inode_pool, ip); |
| 1594 | vp->v_data = NULL; |
| 1595 | } |
| 1596 | |
| 1597 | /* |
| 1598 | * Read an inode from disk and initialize this vnode / inode pair. |
| 1599 | * Caller assures no other thread will try to load this inode. |
| 1600 | */ |
| 1601 | int |
| 1602 | lfs_loadvnode(struct mount *mp, struct vnode *vp, |
| 1603 | const void *key, size_t key_len, const void **new_key) |
| 1604 | { |
| 1605 | struct lfs *fs; |
| 1606 | union lfs_dinode *dip; |
| 1607 | struct inode *ip; |
| 1608 | struct buf *bp; |
| 1609 | IFILE *ifp; |
| 1610 | struct ulfsmount *ump; |
| 1611 | ino_t ino; |
| 1612 | daddr_t daddr; |
| 1613 | int error, retries; |
| 1614 | struct timespec ts; |
| 1615 | |
| 1616 | KASSERT(key_len == sizeof(ino)); |
| 1617 | memcpy(&ino, key, key_len); |
| 1618 | |
| 1619 | memset(&ts, 0, sizeof ts); /* XXX gcc */ |
| 1620 | |
| 1621 | ump = VFSTOULFS(mp); |
| 1622 | fs = ump->um_lfs; |
| 1623 | |
| 1624 | /* |
| 1625 | * If the filesystem is not completely mounted yet, suspend |
| 1626 | * any access requests (wait for roll-forward to complete). |
| 1627 | */ |
| 1628 | mutex_enter(&lfs_lock); |
| 1629 | while ((fs->lfs_flags & LFS_NOTYET) && curproc->p_pid != fs->lfs_rfpid) |
| 1630 | mtsleep(&fs->lfs_flags, PRIBIO+1, "lfs_notyet" , 0, |
| 1631 | &lfs_lock); |
| 1632 | mutex_exit(&lfs_lock); |
| 1633 | |
| 1634 | /* Translate the inode number to a disk address. */ |
| 1635 | if (ino == LFS_IFILE_INUM) |
| 1636 | daddr = lfs_sb_getidaddr(fs); |
| 1637 | else { |
| 1638 | /* XXX bounds-check this too */ |
| 1639 | LFS_IENTRY(ifp, fs, ino, bp); |
| 1640 | daddr = lfs_if_getdaddr(fs, ifp); |
| 1641 | if (lfs_sb_getversion(fs) > 1) { |
| 1642 | ts.tv_sec = lfs_if_getatime_sec(fs, ifp); |
| 1643 | ts.tv_nsec = lfs_if_getatime_nsec(fs, ifp); |
| 1644 | } |
| 1645 | |
| 1646 | brelse(bp, 0); |
| 1647 | if (daddr == LFS_UNUSED_DADDR) |
| 1648 | return (ENOENT); |
| 1649 | } |
| 1650 | |
| 1651 | /* Allocate/init new vnode/inode. */ |
| 1652 | lfs_init_vnode(ump, ino, vp); |
| 1653 | ip = VTOI(vp); |
| 1654 | |
| 1655 | /* If the cleaner supplied the inode, use it. */ |
| 1656 | if (curlwp == fs->lfs_cleaner_thread && fs->lfs_cleaner_hint != NULL && |
| 1657 | fs->lfs_cleaner_hint->bi_lbn == LFS_UNUSED_LBN) { |
| 1658 | dip = fs->lfs_cleaner_hint->bi_bp; |
| 1659 | if (fs->lfs_is64) { |
| 1660 | error = copyin(dip, &ip->i_din->u_64, |
| 1661 | sizeof(struct lfs64_dinode)); |
| 1662 | } else { |
| 1663 | error = copyin(dip, &ip->i_din->u_32, |
| 1664 | sizeof(struct lfs32_dinode)); |
| 1665 | } |
| 1666 | if (error) { |
| 1667 | lfs_deinit_vnode(ump, vp); |
| 1668 | return error; |
| 1669 | } |
| 1670 | KASSERT(ip->i_number == ino); |
| 1671 | goto out; |
| 1672 | } |
| 1673 | |
| 1674 | /* Read in the disk contents for the inode, copy into the inode. */ |
| 1675 | retries = 0; |
| 1676 | again: |
| 1677 | error = bread(fs->lfs_devvp, LFS_FSBTODB(fs, daddr), |
| 1678 | (lfs_sb_getversion(fs) == 1 ? lfs_sb_getbsize(fs) : lfs_sb_getibsize(fs)), |
| 1679 | 0, &bp); |
| 1680 | if (error) { |
| 1681 | lfs_deinit_vnode(ump, vp); |
| 1682 | return error; |
| 1683 | } |
| 1684 | |
| 1685 | dip = lfs_ifind(fs, ino, bp); |
| 1686 | if (dip == NULL) { |
| 1687 | /* Assume write has not completed yet; try again */ |
| 1688 | brelse(bp, BC_INVAL); |
| 1689 | ++retries; |
| 1690 | if (retries <= LFS_IFIND_RETRIES) { |
| 1691 | mutex_enter(&lfs_lock); |
| 1692 | if (fs->lfs_iocount) { |
| 1693 | DLOG((DLOG_VNODE, |
| 1694 | "%s: dinode %d not found, retrying...\n" , |
| 1695 | __func__, ino)); |
| 1696 | (void)mtsleep(&fs->lfs_iocount, PRIBIO + 1, |
| 1697 | "lfs ifind" , 1, &lfs_lock); |
| 1698 | } else |
| 1699 | retries = LFS_IFIND_RETRIES; |
| 1700 | mutex_exit(&lfs_lock); |
| 1701 | goto again; |
| 1702 | } |
| 1703 | #ifdef DEBUG |
| 1704 | /* If the seglock is held look at the bpp to see |
| 1705 | what is there anyway */ |
| 1706 | mutex_enter(&lfs_lock); |
| 1707 | if (fs->lfs_seglock > 0) { |
| 1708 | struct buf **bpp; |
| 1709 | union lfs_dinode *dp; |
| 1710 | int i; |
| 1711 | |
| 1712 | for (bpp = fs->lfs_sp->bpp; |
| 1713 | bpp != fs->lfs_sp->cbpp; ++bpp) { |
| 1714 | if ((*bpp)->b_vp == fs->lfs_ivnode && |
| 1715 | bpp != fs->lfs_sp->bpp) { |
| 1716 | /* Inode block */ |
| 1717 | printf("%s: block 0x%" PRIx64 ": " , |
| 1718 | __func__, (*bpp)->b_blkno); |
| 1719 | for (i = 0; i < LFS_INOPB(fs); i++) { |
| 1720 | dp = DINO_IN_BLOCK(fs, |
| 1721 | (*bpp)->b_data, i); |
| 1722 | if (lfs_dino_getinumber(fs, dp)) |
| 1723 | printf("%ju " , |
| 1724 | (uintmax_t)lfs_dino_getinumber(fs, dp)); |
| 1725 | } |
| 1726 | printf("\n" ); |
| 1727 | } |
| 1728 | } |
| 1729 | } |
| 1730 | mutex_exit(&lfs_lock); |
| 1731 | #endif /* DEBUG */ |
| 1732 | panic("lfs_loadvnode: dinode not found" ); |
| 1733 | } |
| 1734 | lfs_copy_dinode(fs, ip->i_din, dip); |
| 1735 | brelse(bp, 0); |
| 1736 | |
| 1737 | out: |
| 1738 | if (lfs_sb_getversion(fs) > 1) { |
| 1739 | lfs_dino_setatime(fs, ip->i_din, ts.tv_sec); |
| 1740 | lfs_dino_setatimensec(fs, ip->i_din, ts.tv_nsec); |
| 1741 | } |
| 1742 | |
| 1743 | lfs_vinit(mp, &vp); |
| 1744 | |
| 1745 | *new_key = &ip->i_number; |
| 1746 | return 0; |
| 1747 | } |
| 1748 | |
| 1749 | /* |
| 1750 | * Create a new inode and initialize this vnode / inode pair. |
| 1751 | */ |
| 1752 | int |
| 1753 | lfs_newvnode(struct mount *mp, struct vnode *dvp, struct vnode *vp, |
| 1754 | struct vattr *vap, kauth_cred_t cred, |
| 1755 | size_t *key_len, const void **new_key) |
| 1756 | { |
| 1757 | ino_t ino; |
| 1758 | struct inode *ip; |
| 1759 | struct ulfsmount *ump; |
| 1760 | struct lfs *fs; |
| 1761 | int error, mode, gen; |
| 1762 | |
| 1763 | KASSERT(dvp != NULL || vap->va_fileid > 0); |
| 1764 | KASSERT(dvp != NULL && dvp->v_mount == mp); |
| 1765 | KASSERT(vap->va_type != VNON); |
| 1766 | |
| 1767 | *key_len = sizeof(ino); |
| 1768 | ump = VFSTOULFS(mp); |
| 1769 | fs = ump->um_lfs; |
| 1770 | mode = MAKEIMODE(vap->va_type, vap->va_mode); |
| 1771 | |
| 1772 | /* |
| 1773 | * Allocate fresh inode. With "dvp == NULL" take the inode number |
| 1774 | * and version from "vap". |
| 1775 | */ |
| 1776 | if (dvp == NULL) { |
| 1777 | ino = vap->va_fileid; |
| 1778 | gen = vap->va_gen; |
| 1779 | error = lfs_valloc_fixed(fs, ino, gen); |
| 1780 | } else { |
| 1781 | error = lfs_valloc(dvp, mode, cred, &ino, &gen); |
| 1782 | } |
| 1783 | if (error) |
| 1784 | return error; |
| 1785 | |
| 1786 | /* Attach inode to vnode. */ |
| 1787 | lfs_init_vnode(ump, ino, vp); |
| 1788 | ip = VTOI(vp); |
| 1789 | |
| 1790 | mutex_enter(&lfs_lock); |
| 1791 | LFS_SET_UINO(ip, IN_CHANGE); |
| 1792 | mutex_exit(&lfs_lock); |
| 1793 | |
| 1794 | /* Note no blocks yet */ |
| 1795 | ip->i_lfs_hiblk = -1; |
| 1796 | |
| 1797 | /* Set a new generation number for this inode. */ |
| 1798 | ip->i_gen = gen; |
| 1799 | lfs_dino_setgen(fs, ip->i_din, gen); |
| 1800 | |
| 1801 | memset(ip->i_lfs_fragsize, 0, |
| 1802 | ULFS_NDADDR * sizeof(*ip->i_lfs_fragsize)); |
| 1803 | |
| 1804 | /* Set uid / gid. */ |
| 1805 | if (cred == NOCRED || cred == FSCRED) { |
| 1806 | ip->i_gid = 0; |
| 1807 | ip->i_uid = 0; |
| 1808 | } else { |
| 1809 | ip->i_gid = VTOI(dvp)->i_gid; |
| 1810 | ip->i_uid = kauth_cred_geteuid(cred); |
| 1811 | } |
| 1812 | DIP_ASSIGN(ip, gid, ip->i_gid); |
| 1813 | DIP_ASSIGN(ip, uid, ip->i_uid); |
| 1814 | |
| 1815 | #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) |
| 1816 | error = lfs_chkiq(ip, 1, cred, 0); |
| 1817 | if (error) { |
| 1818 | lfs_vfree(dvp, ino, mode); |
| 1819 | lfs_deinit_vnode(ump, vp); |
| 1820 | |
| 1821 | return error; |
| 1822 | } |
| 1823 | #endif |
| 1824 | |
| 1825 | /* Set type and finalize. */ |
| 1826 | ip->i_flags = 0; |
| 1827 | DIP_ASSIGN(ip, flags, 0); |
| 1828 | ip->i_mode = mode; |
| 1829 | DIP_ASSIGN(ip, mode, mode); |
| 1830 | if (vap->va_rdev != VNOVAL) { |
| 1831 | /* |
| 1832 | * Want to be able to use this to make badblock |
| 1833 | * inodes, so don't truncate the dev number. |
| 1834 | */ |
| 1835 | // XXX clean this up |
| 1836 | if (ump->um_fstype == ULFS1) |
| 1837 | ip->i_din->u_32.di_rdev = ulfs_rw32(vap->va_rdev, |
| 1838 | ULFS_MPNEEDSWAP(fs)); |
| 1839 | else |
| 1840 | ip->i_din->u_64.di_rdev = ulfs_rw64(vap->va_rdev, |
| 1841 | ULFS_MPNEEDSWAP(fs)); |
| 1842 | } |
| 1843 | lfs_vinit(mp, &vp); |
| 1844 | |
| 1845 | *new_key = &ip->i_number; |
| 1846 | return 0; |
| 1847 | } |
| 1848 | |
| 1849 | /* |
| 1850 | * File handle to vnode |
| 1851 | */ |
| 1852 | int |
| 1853 | lfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) |
| 1854 | { |
| 1855 | struct lfid lfh; |
| 1856 | struct lfs *fs; |
| 1857 | |
| 1858 | if (fhp->fid_len != sizeof(struct lfid)) |
| 1859 | return EINVAL; |
| 1860 | |
| 1861 | memcpy(&lfh, fhp, sizeof(lfh)); |
| 1862 | if (lfh.lfid_ino < LFS_IFILE_INUM) |
| 1863 | return ESTALE; |
| 1864 | |
| 1865 | fs = VFSTOULFS(mp)->um_lfs; |
| 1866 | if (lfh.lfid_ident != lfs_sb_getident(fs)) |
| 1867 | return ESTALE; |
| 1868 | |
| 1869 | if (lfh.lfid_ino > |
| 1870 | ((lfs_dino_getsize(fs, VTOI(fs->lfs_ivnode)->i_din) >> lfs_sb_getbshift(fs)) - |
| 1871 | lfs_sb_getcleansz(fs) - lfs_sb_getsegtabsz(fs)) * lfs_sb_getifpb(fs)) |
| 1872 | return ESTALE; |
| 1873 | |
| 1874 | return (ulfs_fhtovp(mp, &lfh.lfid_ufid, vpp)); |
| 1875 | } |
| 1876 | |
| 1877 | /* |
| 1878 | * Vnode pointer to File handle |
| 1879 | */ |
| 1880 | /* ARGSUSED */ |
| 1881 | int |
| 1882 | lfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) |
| 1883 | { |
| 1884 | struct inode *ip; |
| 1885 | struct lfid lfh; |
| 1886 | |
| 1887 | if (*fh_size < sizeof(struct lfid)) { |
| 1888 | *fh_size = sizeof(struct lfid); |
| 1889 | return E2BIG; |
| 1890 | } |
| 1891 | *fh_size = sizeof(struct lfid); |
| 1892 | ip = VTOI(vp); |
| 1893 | memset(&lfh, 0, sizeof(lfh)); |
| 1894 | lfh.lfid_len = sizeof(struct lfid); |
| 1895 | lfh.lfid_ino = ip->i_number; |
| 1896 | lfh.lfid_gen = ip->i_gen; |
| 1897 | lfh.lfid_ident = lfs_sb_getident(ip->i_lfs); |
| 1898 | memcpy(fhp, &lfh, sizeof(lfh)); |
| 1899 | return (0); |
| 1900 | } |
| 1901 | |
| 1902 | /* |
| 1903 | * ulfs_bmaparray callback function for writing. |
| 1904 | * |
| 1905 | * Since blocks will be written to the new segment anyway, |
| 1906 | * we don't care about current daddr of them. |
| 1907 | */ |
| 1908 | static bool |
| 1909 | lfs_issequential_hole(const struct lfs *fs, |
| 1910 | daddr_t daddr0, daddr_t daddr1) |
| 1911 | { |
| 1912 | (void)fs; /* not used */ |
| 1913 | |
| 1914 | KASSERT(daddr0 == UNWRITTEN || |
| 1915 | (0 <= daddr0 && daddr0 <= LFS_MAX_DADDR(fs))); |
| 1916 | KASSERT(daddr1 == UNWRITTEN || |
| 1917 | (0 <= daddr1 && daddr1 <= LFS_MAX_DADDR(fs))); |
| 1918 | |
| 1919 | /* NOTE: all we want to know here is 'hole or not'. */ |
| 1920 | /* NOTE: UNASSIGNED is converted to 0 by ulfs_bmaparray. */ |
| 1921 | |
| 1922 | /* |
| 1923 | * treat UNWRITTENs and all resident blocks as 'contiguous' |
| 1924 | */ |
| 1925 | if (daddr0 != 0 && daddr1 != 0) |
| 1926 | return true; |
| 1927 | |
| 1928 | /* |
| 1929 | * both are in hole? |
| 1930 | */ |
| 1931 | if (daddr0 == 0 && daddr1 == 0) |
| 1932 | return true; /* all holes are 'contiguous' for us. */ |
| 1933 | |
| 1934 | return false; |
| 1935 | } |
| 1936 | |
| 1937 | /* |
| 1938 | * lfs_gop_write functions exactly like genfs_gop_write, except that |
| 1939 | * (1) it requires the seglock to be held by its caller, and sp->fip |
| 1940 | * to be properly initialized (it will return without re-initializing |
| 1941 | * sp->fip, and without calling lfs_writeseg). |
| 1942 | * (2) it uses the remaining space in the segment, rather than VOP_BMAP, |
| 1943 | * to determine how large a block it can write at once (though it does |
| 1944 | * still use VOP_BMAP to find holes in the file); |
| 1945 | * (3) it calls lfs_gatherblock instead of VOP_STRATEGY on its blocks |
| 1946 | * (leaving lfs_writeseg to deal with the cluster blocks, so we might |
| 1947 | * now have clusters of clusters, ick.) |
| 1948 | */ |
| 1949 | static int |
| 1950 | lfs_gop_write(struct vnode *vp, struct vm_page **pgs, int npages, |
| 1951 | int flags) |
| 1952 | { |
| 1953 | int i, error, run, haveeof = 0; |
| 1954 | int fs_bshift; |
| 1955 | vaddr_t kva; |
| 1956 | off_t eof, offset, startoffset = 0; |
| 1957 | size_t bytes, iobytes, skipbytes; |
| 1958 | bool async = (flags & PGO_SYNCIO) == 0; |
| 1959 | daddr_t lbn, blkno; |
| 1960 | struct vm_page *pg; |
| 1961 | struct buf *mbp, *bp; |
| 1962 | struct vnode *devvp = VTOI(vp)->i_devvp; |
| 1963 | struct inode *ip = VTOI(vp); |
| 1964 | struct lfs *fs = ip->i_lfs; |
| 1965 | struct segment *sp = fs->lfs_sp; |
| 1966 | SEGSUM *ssp; |
| 1967 | UVMHIST_FUNC("lfs_gop_write" ); UVMHIST_CALLED(ubchist); |
| 1968 | const char * failreason = NULL; |
| 1969 | |
| 1970 | ASSERT_SEGLOCK(fs); |
| 1971 | |
| 1972 | /* The Ifile lives in the buffer cache */ |
| 1973 | KASSERT(vp != fs->lfs_ivnode); |
| 1974 | |
| 1975 | /* |
| 1976 | * We don't want to fill the disk before the cleaner has a chance |
| 1977 | * to make room for us. If we're in danger of doing that, fail |
| 1978 | * with EAGAIN. The caller will have to notice this, unlock |
| 1979 | * so the cleaner can run, relock and try again. |
| 1980 | * |
| 1981 | * We must write everything, however, if our vnode is being |
| 1982 | * reclaimed. |
| 1983 | */ |
| 1984 | mutex_enter(vp->v_interlock); |
| 1985 | if (LFS_STARVED_FOR_SEGS(fs) && vdead_check(vp, VDEAD_NOWAIT) == 0) { |
| 1986 | mutex_exit(vp->v_interlock); |
| 1987 | failreason = "Starved for segs and not flushing vp" ; |
| 1988 | goto tryagain; |
| 1989 | } |
| 1990 | mutex_exit(vp->v_interlock); |
| 1991 | |
| 1992 | /* |
| 1993 | * Sometimes things slip past the filters in lfs_putpages, |
| 1994 | * and the pagedaemon tries to write pages---problem is |
| 1995 | * that the pagedaemon never acquires the segment lock. |
| 1996 | * |
| 1997 | * Alternatively, pages that were clean when we called |
| 1998 | * genfs_putpages may have become dirty in the meantime. In this |
| 1999 | * case the segment header is not properly set up for blocks |
| 2000 | * to be added to it. |
| 2001 | * |
| 2002 | * Unbusy and unclean the pages, and put them on the ACTIVE |
| 2003 | * queue under the hypothesis that they couldn't have got here |
| 2004 | * unless they were modified *quite* recently. |
| 2005 | * |
| 2006 | * XXXUBC that last statement is an oversimplification of course. |
| 2007 | */ |
| 2008 | if (!LFS_SEGLOCK_HELD(fs)) { |
| 2009 | failreason = "Seglock not held" ; |
| 2010 | goto tryagain; |
| 2011 | } |
| 2012 | if (ip->i_lfs_iflags & LFSI_NO_GOP_WRITE) { |
| 2013 | failreason = "Inode with no_gop_write" ; |
| 2014 | goto tryagain; |
| 2015 | } |
| 2016 | if ((pgs[0]->offset & lfs_sb_getbmask(fs)) != 0) { |
| 2017 | failreason = "Bad page offset" ; |
| 2018 | goto tryagain; |
| 2019 | } |
| 2020 | |
| 2021 | UVMHIST_LOG(ubchist, "vp %p pgs %p npages %d flags 0x%x" , |
| 2022 | vp, pgs, npages, flags); |
| 2023 | |
| 2024 | GOP_SIZE(vp, vp->v_size, &eof, 0); |
| 2025 | haveeof = 1; |
| 2026 | |
| 2027 | if (vp->v_type == VREG) |
| 2028 | fs_bshift = vp->v_mount->mnt_fs_bshift; |
| 2029 | else |
| 2030 | fs_bshift = DEV_BSHIFT; |
| 2031 | error = 0; |
| 2032 | pg = pgs[0]; |
| 2033 | startoffset = pg->offset; |
| 2034 | KASSERT(eof >= 0); |
| 2035 | |
| 2036 | if (startoffset >= eof) { |
| 2037 | failreason = "Offset beyond EOF" ; |
| 2038 | goto tryagain; |
| 2039 | } else |
| 2040 | bytes = MIN(npages << PAGE_SHIFT, eof - startoffset); |
| 2041 | skipbytes = 0; |
| 2042 | |
| 2043 | KASSERT(bytes != 0); |
| 2044 | |
| 2045 | /* Swap PG_DELWRI for PG_PAGEOUT */ |
| 2046 | for (i = 0; i < npages; i++) { |
| 2047 | if (pgs[i]->flags & PG_DELWRI) { |
| 2048 | KASSERT(!(pgs[i]->flags & PG_PAGEOUT)); |
| 2049 | pgs[i]->flags &= ~PG_DELWRI; |
| 2050 | pgs[i]->flags |= PG_PAGEOUT; |
| 2051 | uvm_pageout_start(1); |
| 2052 | mutex_enter(vp->v_interlock); |
| 2053 | mutex_enter(&uvm_pageqlock); |
| 2054 | uvm_pageunwire(pgs[i]); |
| 2055 | mutex_exit(&uvm_pageqlock); |
| 2056 | mutex_exit(vp->v_interlock); |
| 2057 | } |
| 2058 | } |
| 2059 | |
| 2060 | /* |
| 2061 | * Check to make sure we're starting on a block boundary. |
| 2062 | * We'll check later to make sure we always write entire |
| 2063 | * blocks (or fragments). |
| 2064 | */ |
| 2065 | if (startoffset & lfs_sb_getbmask(fs)) |
| 2066 | printf("%" PRId64 " & %" PRIu64 " = %" PRId64 "\n" , |
| 2067 | startoffset, lfs_sb_getbmask(fs), |
| 2068 | startoffset & lfs_sb_getbmask(fs)); |
| 2069 | KASSERT((startoffset & lfs_sb_getbmask(fs)) == 0); |
| 2070 | if (bytes & lfs_sb_getffmask(fs)) { |
| 2071 | printf("lfs_gop_write: asked to write %ld bytes\n" , (long)bytes); |
| 2072 | panic("lfs_gop_write: non-integer blocks" ); |
| 2073 | } |
| 2074 | |
| 2075 | /* |
| 2076 | * We could deadlock here on pager_map with UVMPAGER_MAPIN_WAITOK. |
| 2077 | * If we would, write what we have and try again. If we don't |
| 2078 | * have anything to write, we'll have to sleep. |
| 2079 | */ |
| 2080 | ssp = (SEGSUM *)sp->segsum; |
| 2081 | if ((kva = uvm_pagermapin(pgs, npages, UVMPAGER_MAPIN_WRITE | |
| 2082 | (lfs_ss_getnfinfo(fs, ssp) < 1 ? |
| 2083 | UVMPAGER_MAPIN_WAITOK : 0))) == 0x0) { |
| 2084 | DLOG((DLOG_PAGE, "lfs_gop_write: forcing write\n" )); |
| 2085 | #if 0 |
| 2086 | " with nfinfo=%d at offset 0x%jx\n" , |
| 2087 | (int)lfs_ss_getnfinfo(fs, ssp), |
| 2088 | (uintmax_t)lfs_sb_getoffset(fs))); |
| 2089 | #endif |
| 2090 | lfs_updatemeta(sp); |
| 2091 | lfs_release_finfo(fs); |
| 2092 | (void) lfs_writeseg(fs, sp); |
| 2093 | |
| 2094 | lfs_acquire_finfo(fs, ip->i_number, ip->i_gen); |
| 2095 | |
| 2096 | /* |
| 2097 | * Having given up all of the pager_map we were holding, |
| 2098 | * we can now wait for aiodoned to reclaim it for us |
| 2099 | * without fear of deadlock. |
| 2100 | */ |
| 2101 | kva = uvm_pagermapin(pgs, npages, UVMPAGER_MAPIN_WRITE | |
| 2102 | UVMPAGER_MAPIN_WAITOK); |
| 2103 | } |
| 2104 | |
| 2105 | mbp = getiobuf(NULL, true); |
| 2106 | UVMHIST_LOG(ubchist, "vp %p mbp %p num now %d bytes 0x%x" , |
| 2107 | vp, mbp, vp->v_numoutput, bytes); |
| 2108 | mbp->b_bufsize = npages << PAGE_SHIFT; |
| 2109 | mbp->b_data = (void *)kva; |
| 2110 | mbp->b_resid = mbp->b_bcount = bytes; |
| 2111 | mbp->b_cflags = BC_BUSY|BC_AGE; |
| 2112 | mbp->b_iodone = uvm_aio_biodone; |
| 2113 | |
| 2114 | bp = NULL; |
| 2115 | for (offset = startoffset; |
| 2116 | bytes > 0; |
| 2117 | offset += iobytes, bytes -= iobytes) { |
| 2118 | lbn = offset >> fs_bshift; |
| 2119 | error = ulfs_bmaparray(vp, lbn, &blkno, NULL, NULL, &run, |
| 2120 | lfs_issequential_hole); |
| 2121 | if (error) { |
| 2122 | UVMHIST_LOG(ubchist, "ulfs_bmaparray() -> %d" , |
| 2123 | error,0,0,0); |
| 2124 | skipbytes += bytes; |
| 2125 | bytes = 0; |
| 2126 | break; |
| 2127 | } |
| 2128 | |
| 2129 | iobytes = MIN((((off_t)lbn + 1 + run) << fs_bshift) - offset, |
| 2130 | bytes); |
| 2131 | if (blkno == (daddr_t)-1) { |
| 2132 | skipbytes += iobytes; |
| 2133 | continue; |
| 2134 | } |
| 2135 | |
| 2136 | /* |
| 2137 | * Discover how much we can really pack into this buffer. |
| 2138 | */ |
| 2139 | /* If no room in the current segment, finish it up */ |
| 2140 | if (sp->sum_bytes_left < sizeof(int32_t) || |
| 2141 | sp->seg_bytes_left < (1 << lfs_sb_getbshift(fs))) { |
| 2142 | int vers; |
| 2143 | |
| 2144 | lfs_updatemeta(sp); |
| 2145 | vers = lfs_fi_getversion(fs, sp->fip); |
| 2146 | lfs_release_finfo(fs); |
| 2147 | (void) lfs_writeseg(fs, sp); |
| 2148 | |
| 2149 | lfs_acquire_finfo(fs, ip->i_number, vers); |
| 2150 | } |
| 2151 | /* Check both for space in segment and space in segsum */ |
| 2152 | iobytes = MIN(iobytes, (sp->seg_bytes_left >> fs_bshift) |
| 2153 | << fs_bshift); |
| 2154 | iobytes = MIN(iobytes, (sp->sum_bytes_left / sizeof(int32_t)) |
| 2155 | << fs_bshift); |
| 2156 | KASSERT(iobytes > 0); |
| 2157 | |
| 2158 | /* if it's really one i/o, don't make a second buf */ |
| 2159 | if (offset == startoffset && iobytes == bytes) { |
| 2160 | bp = mbp; |
| 2161 | /* |
| 2162 | * All the LFS output is done by the segwriter. It |
| 2163 | * will increment numoutput by one for all the bufs it |
| 2164 | * recieves. However this buffer needs one extra to |
| 2165 | * account for aiodone. |
| 2166 | */ |
| 2167 | mutex_enter(vp->v_interlock); |
| 2168 | vp->v_numoutput++; |
| 2169 | mutex_exit(vp->v_interlock); |
| 2170 | } else { |
| 2171 | bp = getiobuf(NULL, true); |
| 2172 | UVMHIST_LOG(ubchist, "vp %p bp %p num now %d" , |
| 2173 | vp, bp, vp->v_numoutput, 0); |
| 2174 | nestiobuf_setup(mbp, bp, offset - pg->offset, iobytes); |
| 2175 | /* |
| 2176 | * LFS doesn't like async I/O here, dies with |
| 2177 | * an assert in lfs_bwrite(). Is that assert |
| 2178 | * valid? I retained non-async behaviour when |
| 2179 | * converted this to use nestiobuf --pooka |
| 2180 | */ |
| 2181 | bp->b_flags &= ~B_ASYNC; |
| 2182 | } |
| 2183 | |
| 2184 | /* XXX This is silly ... is this necessary? */ |
| 2185 | mutex_enter(&bufcache_lock); |
| 2186 | mutex_enter(vp->v_interlock); |
| 2187 | bgetvp(vp, bp); |
| 2188 | mutex_exit(vp->v_interlock); |
| 2189 | mutex_exit(&bufcache_lock); |
| 2190 | |
| 2191 | bp->b_lblkno = lfs_lblkno(fs, offset); |
| 2192 | bp->b_private = mbp; |
| 2193 | if (devvp->v_type == VBLK) { |
| 2194 | bp->b_dev = devvp->v_rdev; |
| 2195 | } |
| 2196 | VOP_BWRITE(bp->b_vp, bp); |
| 2197 | while (lfs_gatherblock(sp, bp, NULL)) |
| 2198 | continue; |
| 2199 | } |
| 2200 | |
| 2201 | nestiobuf_done(mbp, skipbytes, error); |
| 2202 | if (skipbytes) { |
| 2203 | UVMHIST_LOG(ubchist, "skipbytes %d" , skipbytes, 0,0,0); |
| 2204 | } |
| 2205 | UVMHIST_LOG(ubchist, "returning 0" , 0,0,0,0); |
| 2206 | |
| 2207 | if (!async) { |
| 2208 | /* Start a segment write. */ |
| 2209 | UVMHIST_LOG(ubchist, "flushing" , 0,0,0,0); |
| 2210 | mutex_enter(&lfs_lock); |
| 2211 | lfs_flush(fs, 0, 1); |
| 2212 | mutex_exit(&lfs_lock); |
| 2213 | } |
| 2214 | |
| 2215 | if ((sp->seg_flags & SEGM_SINGLE) && lfs_sb_getcurseg(fs) != fs->lfs_startseg) |
| 2216 | return EAGAIN; |
| 2217 | |
| 2218 | return (0); |
| 2219 | |
| 2220 | tryagain: |
| 2221 | /* |
| 2222 | * We can't write the pages, for whatever reason. |
| 2223 | * Clean up after ourselves, and make the caller try again. |
| 2224 | */ |
| 2225 | mutex_enter(vp->v_interlock); |
| 2226 | |
| 2227 | /* Tell why we're here, if we know */ |
| 2228 | if (failreason != NULL) { |
| 2229 | DLOG((DLOG_PAGE, "lfs_gop_write: %s\n" , failreason)); |
| 2230 | } |
| 2231 | if (haveeof && startoffset >= eof) { |
| 2232 | DLOG((DLOG_PAGE, "lfs_gop_write: ino %d start 0x%" PRIx64 |
| 2233 | " eof 0x%" PRIx64 " npages=%d\n" , VTOI(vp)->i_number, |
| 2234 | pgs[0]->offset, eof, npages)); |
| 2235 | } |
| 2236 | |
| 2237 | mutex_enter(&uvm_pageqlock); |
| 2238 | for (i = 0; i < npages; i++) { |
| 2239 | pg = pgs[i]; |
| 2240 | |
| 2241 | if (pg->flags & PG_PAGEOUT) |
| 2242 | uvm_pageout_done(1); |
| 2243 | if (pg->flags & PG_DELWRI) { |
| 2244 | uvm_pageunwire(pg); |
| 2245 | } |
| 2246 | uvm_pageactivate(pg); |
| 2247 | pg->flags &= ~(PG_CLEAN|PG_DELWRI|PG_PAGEOUT|PG_RELEASED); |
| 2248 | DLOG((DLOG_PAGE, "pg[%d] = %p (vp %p off %" PRIx64 ")\n" , i, pg, |
| 2249 | vp, pg->offset)); |
| 2250 | DLOG((DLOG_PAGE, "pg[%d]->flags = %x\n" , i, pg->flags)); |
| 2251 | DLOG((DLOG_PAGE, "pg[%d]->pqflags = %x\n" , i, pg->pqflags)); |
| 2252 | DLOG((DLOG_PAGE, "pg[%d]->uanon = %p\n" , i, pg->uanon)); |
| 2253 | DLOG((DLOG_PAGE, "pg[%d]->uobject = %p\n" , i, pg->uobject)); |
| 2254 | DLOG((DLOG_PAGE, "pg[%d]->wire_count = %d\n" , i, |
| 2255 | pg->wire_count)); |
| 2256 | DLOG((DLOG_PAGE, "pg[%d]->loan_count = %d\n" , i, |
| 2257 | pg->loan_count)); |
| 2258 | } |
| 2259 | /* uvm_pageunbusy takes care of PG_BUSY, PG_WANTED */ |
| 2260 | uvm_page_unbusy(pgs, npages); |
| 2261 | mutex_exit(&uvm_pageqlock); |
| 2262 | mutex_exit(vp->v_interlock); |
| 2263 | return EAGAIN; |
| 2264 | } |
| 2265 | |
| 2266 | /* |
| 2267 | * finish vnode/inode initialization. |
| 2268 | * used by lfs_vget. |
| 2269 | */ |
| 2270 | void |
| 2271 | lfs_vinit(struct mount *mp, struct vnode **vpp) |
| 2272 | { |
| 2273 | struct vnode *vp = *vpp; |
| 2274 | struct inode *ip = VTOI(vp); |
| 2275 | struct ulfsmount *ump = VFSTOULFS(mp); |
| 2276 | struct lfs *fs = ump->um_lfs; |
| 2277 | int i; |
| 2278 | |
| 2279 | ip->i_mode = lfs_dino_getmode(fs, ip->i_din); |
| 2280 | ip->i_nlink = lfs_dino_getnlink(fs, ip->i_din); |
| 2281 | ip->i_lfs_osize = ip->i_size = lfs_dino_getsize(fs, ip->i_din); |
| 2282 | ip->i_flags = lfs_dino_getflags(fs, ip->i_din); |
| 2283 | ip->i_gen = lfs_dino_getgen(fs, ip->i_din); |
| 2284 | ip->i_uid = lfs_dino_getuid(fs, ip->i_din); |
| 2285 | ip->i_gid = lfs_dino_getgid(fs, ip->i_din); |
| 2286 | |
| 2287 | ip->i_lfs_effnblks = lfs_dino_getblocks(fs, ip->i_din); |
| 2288 | ip->i_lfs_odnlink = lfs_dino_getnlink(fs, ip->i_din); |
| 2289 | |
| 2290 | /* |
| 2291 | * Initialize the vnode from the inode, check for aliases. In all |
| 2292 | * cases re-init ip, the underlying vnode/inode may have changed. |
| 2293 | */ |
| 2294 | ulfs_vinit(mp, lfs_specop_p, lfs_fifoop_p, &vp); |
| 2295 | ip = VTOI(vp); |
| 2296 | |
| 2297 | memset(ip->i_lfs_fragsize, 0, ULFS_NDADDR * sizeof(*ip->i_lfs_fragsize)); |
| 2298 | if (vp->v_type != VLNK || ip->i_size >= ip->i_lfs->um_maxsymlinklen) { |
| 2299 | #ifdef DEBUG |
| 2300 | for (i = (ip->i_size + lfs_sb_getbsize(fs) - 1) >> lfs_sb_getbshift(fs); |
| 2301 | i < ULFS_NDADDR; i++) { |
| 2302 | if ((vp->v_type == VBLK || vp->v_type == VCHR) && |
| 2303 | i == 0) |
| 2304 | continue; |
| 2305 | if (lfs_dino_getdb(fs, ip->i_din, i) != 0) { |
| 2306 | lfs_dump_dinode(fs, ip->i_din); |
| 2307 | panic("inconsistent inode (direct)" ); |
| 2308 | } |
| 2309 | } |
| 2310 | for ( ; i < ULFS_NDADDR + ULFS_NIADDR; i++) { |
| 2311 | if (lfs_dino_getib(fs, ip->i_din, i - ULFS_NDADDR) != 0) { |
| 2312 | lfs_dump_dinode(fs, ip->i_din); |
| 2313 | panic("inconsistent inode (indirect)" ); |
| 2314 | } |
| 2315 | } |
| 2316 | #endif /* DEBUG */ |
| 2317 | for (i = 0; i < ULFS_NDADDR; i++) |
| 2318 | if (lfs_dino_getdb(fs, ip->i_din, i) != 0) |
| 2319 | ip->i_lfs_fragsize[i] = lfs_blksize(fs, ip, i); |
| 2320 | } |
| 2321 | |
| 2322 | #ifdef DIAGNOSTIC |
| 2323 | if (vp->v_type == VNON) { |
| 2324 | # ifdef DEBUG |
| 2325 | lfs_dump_dinode(fs, ip->i_din); |
| 2326 | # endif |
| 2327 | panic("lfs_vinit: ino %llu is type VNON! (ifmt=%o)\n" , |
| 2328 | (unsigned long long)ip->i_number, |
| 2329 | (ip->i_mode & LFS_IFMT) >> 12); |
| 2330 | } |
| 2331 | #endif /* DIAGNOSTIC */ |
| 2332 | |
| 2333 | /* |
| 2334 | * Finish inode initialization now that aliasing has been resolved. |
| 2335 | */ |
| 2336 | |
| 2337 | ip->i_devvp = fs->lfs_devvp; |
| 2338 | vref(ip->i_devvp); |
| 2339 | #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) |
| 2340 | ulfsquota_init(ip); |
| 2341 | #endif |
| 2342 | genfs_node_init(vp, &lfs_genfsops); |
| 2343 | uvm_vnp_setsize(vp, ip->i_size); |
| 2344 | |
| 2345 | /* Initialize hiblk from file size */ |
| 2346 | ip->i_lfs_hiblk = lfs_lblkno(ip->i_lfs, ip->i_size + lfs_sb_getbsize(ip->i_lfs) - 1) - 1; |
| 2347 | |
| 2348 | *vpp = vp; |
| 2349 | } |
| 2350 | |
| 2351 | /* |
| 2352 | * Resize the filesystem to contain the specified number of segments. |
| 2353 | */ |
| 2354 | int |
| 2355 | lfs_resize_fs(struct lfs *fs, int newnsegs) |
| 2356 | { |
| 2357 | SEGUSE *sup; |
| 2358 | CLEANERINFO *cip; |
| 2359 | struct buf *bp, *obp; |
| 2360 | daddr_t olast, nlast, ilast, noff, start, end; |
| 2361 | struct vnode *ivp; |
| 2362 | struct inode *ip; |
| 2363 | int error, badnews, inc, oldnsegs; |
| 2364 | int sbbytes, csbbytes, gain, cgain; |
| 2365 | int i; |
| 2366 | |
| 2367 | /* Only support v2 and up */ |
| 2368 | if (lfs_sb_getversion(fs) < 2) |
| 2369 | return EOPNOTSUPP; |
| 2370 | |
| 2371 | /* If we're doing nothing, do it fast */ |
| 2372 | oldnsegs = lfs_sb_getnseg(fs); |
| 2373 | if (newnsegs == oldnsegs) |
| 2374 | return 0; |
| 2375 | |
| 2376 | /* We always have to have two superblocks */ |
| 2377 | if (newnsegs <= lfs_dtosn(fs, lfs_sb_getsboff(fs, 1))) |
| 2378 | /* XXX this error code is rather nonsense */ |
| 2379 | return EFBIG; |
| 2380 | |
| 2381 | ivp = fs->lfs_ivnode; |
| 2382 | ip = VTOI(ivp); |
| 2383 | error = 0; |
| 2384 | |
| 2385 | /* Take the segment lock so no one else calls lfs_newseg() */ |
| 2386 | lfs_seglock(fs, SEGM_PROT); |
| 2387 | |
| 2388 | /* |
| 2389 | * Make sure the segments we're going to be losing, if any, |
| 2390 | * are in fact empty. We hold the seglock, so their status |
| 2391 | * cannot change underneath us. Count the superblocks we lose, |
| 2392 | * while we're at it. |
| 2393 | */ |
| 2394 | sbbytes = csbbytes = 0; |
| 2395 | cgain = 0; |
| 2396 | for (i = newnsegs; i < oldnsegs; i++) { |
| 2397 | LFS_SEGENTRY(sup, fs, i, bp); |
| 2398 | badnews = sup->su_nbytes || !(sup->su_flags & SEGUSE_INVAL); |
| 2399 | if (sup->su_flags & SEGUSE_SUPERBLOCK) |
| 2400 | sbbytes += LFS_SBPAD; |
| 2401 | if (!(sup->su_flags & SEGUSE_DIRTY)) { |
| 2402 | ++cgain; |
| 2403 | if (sup->su_flags & SEGUSE_SUPERBLOCK) |
| 2404 | csbbytes += LFS_SBPAD; |
| 2405 | } |
| 2406 | brelse(bp, 0); |
| 2407 | if (badnews) { |
| 2408 | error = EBUSY; |
| 2409 | goto out; |
| 2410 | } |
| 2411 | } |
| 2412 | |
| 2413 | /* Note old and new segment table endpoints, and old ifile size */ |
| 2414 | olast = lfs_sb_getcleansz(fs) + lfs_sb_getsegtabsz(fs); |
| 2415 | nlast = howmany(newnsegs, lfs_sb_getsepb(fs)) + lfs_sb_getcleansz(fs); |
| 2416 | ilast = ivp->v_size >> lfs_sb_getbshift(fs); |
| 2417 | noff = nlast - olast; |
| 2418 | |
| 2419 | /* |
| 2420 | * Make sure no one can use the Ifile while we change it around. |
| 2421 | * Even after taking the iflock we need to make sure no one still |
| 2422 | * is holding Ifile buffers, so we get each one, to drain them. |
| 2423 | * (XXX this could be done better.) |
| 2424 | */ |
| 2425 | rw_enter(&fs->lfs_iflock, RW_WRITER); |
| 2426 | for (i = 0; i < ilast; i++) { |
| 2427 | /* XXX what to do if bread fails? */ |
| 2428 | bread(ivp, i, lfs_sb_getbsize(fs), 0, &bp); |
| 2429 | brelse(bp, 0); |
| 2430 | } |
| 2431 | |
| 2432 | /* Allocate new Ifile blocks */ |
| 2433 | for (i = ilast; i < ilast + noff; i++) { |
| 2434 | if (lfs_balloc(ivp, i * lfs_sb_getbsize(fs), lfs_sb_getbsize(fs), NOCRED, 0, |
| 2435 | &bp) != 0) |
| 2436 | panic("balloc extending ifile" ); |
| 2437 | memset(bp->b_data, 0, lfs_sb_getbsize(fs)); |
| 2438 | VOP_BWRITE(bp->b_vp, bp); |
| 2439 | } |
| 2440 | |
| 2441 | /* Register new ifile size */ |
| 2442 | ip->i_size += noff * lfs_sb_getbsize(fs); |
| 2443 | lfs_dino_setsize(fs, ip->i_din, ip->i_size); |
| 2444 | uvm_vnp_setsize(ivp, ip->i_size); |
| 2445 | |
| 2446 | /* Copy the inode table to its new position */ |
| 2447 | if (noff != 0) { |
| 2448 | if (noff < 0) { |
| 2449 | start = nlast; |
| 2450 | end = ilast + noff; |
| 2451 | inc = 1; |
| 2452 | } else { |
| 2453 | start = ilast + noff - 1; |
| 2454 | end = nlast - 1; |
| 2455 | inc = -1; |
| 2456 | } |
| 2457 | for (i = start; i != end; i += inc) { |
| 2458 | if (bread(ivp, i, lfs_sb_getbsize(fs), |
| 2459 | B_MODIFY, &bp) != 0) |
| 2460 | panic("resize: bread dst blk failed" ); |
| 2461 | if (bread(ivp, i - noff, lfs_sb_getbsize(fs), |
| 2462 | 0, &obp)) |
| 2463 | panic("resize: bread src blk failed" ); |
| 2464 | memcpy(bp->b_data, obp->b_data, lfs_sb_getbsize(fs)); |
| 2465 | VOP_BWRITE(bp->b_vp, bp); |
| 2466 | brelse(obp, 0); |
| 2467 | } |
| 2468 | } |
| 2469 | |
| 2470 | /* If we are expanding, write the new empty SEGUSE entries */ |
| 2471 | if (newnsegs > oldnsegs) { |
| 2472 | for (i = oldnsegs; i < newnsegs; i++) { |
| 2473 | if ((error = bread(ivp, i / lfs_sb_getsepb(fs) + |
| 2474 | lfs_sb_getcleansz(fs), lfs_sb_getbsize(fs), |
| 2475 | B_MODIFY, &bp)) != 0) |
| 2476 | panic("lfs: ifile read: %d" , error); |
| 2477 | while ((i + 1) % lfs_sb_getsepb(fs) && i < newnsegs) { |
| 2478 | sup = &((SEGUSE *)bp->b_data)[i % lfs_sb_getsepb(fs)]; |
| 2479 | memset(sup, 0, sizeof(*sup)); |
| 2480 | i++; |
| 2481 | } |
| 2482 | VOP_BWRITE(bp->b_vp, bp); |
| 2483 | } |
| 2484 | } |
| 2485 | |
| 2486 | /* Zero out unused superblock offsets */ |
| 2487 | for (i = 2; i < LFS_MAXNUMSB; i++) |
| 2488 | if (lfs_dtosn(fs, lfs_sb_getsboff(fs, i)) >= newnsegs) |
| 2489 | lfs_sb_setsboff(fs, i, 0x0); |
| 2490 | |
| 2491 | /* |
| 2492 | * Correct superblock entries that depend on fs size. |
| 2493 | * The computations of these are as follows: |
| 2494 | * |
| 2495 | * size = lfs_segtod(fs, nseg) |
| 2496 | * dsize = lfs_segtod(fs, nseg - minfreeseg) - lfs_btofsb(#super * LFS_SBPAD) |
| 2497 | * bfree = dsize - lfs_btofsb(fs, bsize * nseg / 2) - blocks_actually_used |
| 2498 | * avail = lfs_segtod(fs, nclean) - lfs_btofsb(#clean_super * LFS_SBPAD) |
| 2499 | * + (lfs_segtod(fs, 1) - (offset - curseg)) |
| 2500 | * - lfs_segtod(fs, minfreeseg - (minfreeseg / 2)) |
| 2501 | * |
| 2502 | * XXX - we should probably adjust minfreeseg as well. |
| 2503 | */ |
| 2504 | gain = (newnsegs - oldnsegs); |
| 2505 | lfs_sb_setnseg(fs, newnsegs); |
| 2506 | lfs_sb_setsegtabsz(fs, nlast - lfs_sb_getcleansz(fs)); |
| 2507 | lfs_sb_addsize(fs, gain * lfs_btofsb(fs, lfs_sb_getssize(fs))); |
| 2508 | lfs_sb_adddsize(fs, gain * lfs_btofsb(fs, lfs_sb_getssize(fs)) - lfs_btofsb(fs, sbbytes)); |
| 2509 | lfs_sb_addbfree(fs, gain * lfs_btofsb(fs, lfs_sb_getssize(fs)) - lfs_btofsb(fs, sbbytes) |
| 2510 | - gain * lfs_btofsb(fs, lfs_sb_getbsize(fs) / 2)); |
| 2511 | if (gain > 0) { |
| 2512 | lfs_sb_addnclean(fs, gain); |
| 2513 | lfs_sb_addavail(fs, gain * lfs_btofsb(fs, lfs_sb_getssize(fs))); |
| 2514 | } else { |
| 2515 | lfs_sb_subnclean(fs, cgain); |
| 2516 | lfs_sb_subavail(fs, cgain * lfs_btofsb(fs, lfs_sb_getssize(fs)) - |
| 2517 | lfs_btofsb(fs, csbbytes)); |
| 2518 | } |
| 2519 | |
| 2520 | /* Resize segment flag cache */ |
| 2521 | fs->lfs_suflags[0] = realloc(fs->lfs_suflags[0], |
| 2522 | lfs_sb_getnseg(fs) * sizeof(u_int32_t), M_SEGMENT, M_WAITOK); |
| 2523 | fs->lfs_suflags[1] = realloc(fs->lfs_suflags[1], |
| 2524 | lfs_sb_getnseg(fs) * sizeof(u_int32_t), M_SEGMENT, M_WAITOK); |
| 2525 | for (i = oldnsegs; i < newnsegs; i++) |
| 2526 | fs->lfs_suflags[0][i] = fs->lfs_suflags[1][i] = 0x0; |
| 2527 | |
| 2528 | /* Truncate Ifile if necessary */ |
| 2529 | if (noff < 0) |
| 2530 | lfs_truncate(ivp, ivp->v_size + (noff << lfs_sb_getbshift(fs)), 0, |
| 2531 | NOCRED); |
| 2532 | |
| 2533 | /* Update cleaner info so the cleaner can die */ |
| 2534 | /* XXX what to do if bread fails? */ |
| 2535 | bread(ivp, 0, lfs_sb_getbsize(fs), B_MODIFY, &bp); |
| 2536 | cip = bp->b_data; |
| 2537 | lfs_ci_setclean(fs, cip, lfs_sb_getnclean(fs)); |
| 2538 | lfs_ci_setdirty(fs, cip, lfs_sb_getnseg(fs) - lfs_sb_getnclean(fs)); |
| 2539 | VOP_BWRITE(bp->b_vp, bp); |
| 2540 | |
| 2541 | /* Let Ifile accesses proceed */ |
| 2542 | rw_exit(&fs->lfs_iflock); |
| 2543 | |
| 2544 | out: |
| 2545 | lfs_segunlock(fs); |
| 2546 | return error; |
| 2547 | } |
| 2548 | |
| 2549 | /* |
| 2550 | * Extended attribute dispatch |
| 2551 | */ |
| 2552 | int |
| 2553 | lfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp, |
| 2554 | int attrnamespace, const char *attrname) |
| 2555 | { |
| 2556 | #ifdef LFS_EXTATTR |
| 2557 | struct ulfsmount *ump; |
| 2558 | |
| 2559 | ump = VFSTOULFS(mp); |
| 2560 | if (ump->um_fstype == ULFS1) { |
| 2561 | return ulfs_extattrctl(mp, cmd, vp, attrnamespace, attrname); |
| 2562 | } |
| 2563 | #endif |
| 2564 | return vfs_stdextattrctl(mp, cmd, vp, attrnamespace, attrname); |
| 2565 | } |
| 2566 | |