1 /*- 2 * Copyright (c) 2011-2013 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/nlookup.h> 38 #include <sys/vnode.h> 39 #include <sys/mount.h> 40 #include <sys/fcntl.h> 41 #include <sys/buf.h> 42 #include <sys/uuid.h> 43 #include <sys/vfsops.h> 44 #include <sys/sysctl.h> 45 #include <sys/socket.h> 46 47 #include "hammer2.h" 48 #include "hammer2_disk.h" 49 #include "hammer2_mount.h" 50 51 #define REPORT_REFS_ERRORS 1 /* XXX remove me */ 52 53 struct hammer2_sync_info { 54 hammer2_trans_t trans; 55 int error; 56 int waitfor; 57 }; 58 59 TAILQ_HEAD(hammer2_mntlist, hammer2_mount); 60 static struct hammer2_mntlist hammer2_mntlist; 61 static struct lock hammer2_mntlk; 62 63 int hammer2_debug; 64 int hammer2_cluster_enable = 1; 65 int hammer2_hardlink_enable = 1; 66 long hammer2_iod_file_read; 67 long hammer2_iod_meta_read; 68 long hammer2_iod_indr_read; 69 long hammer2_iod_file_write; 70 long hammer2_iod_meta_write; 71 long hammer2_iod_indr_write; 72 long hammer2_iod_fmap_write; 73 long hammer2_iod_volu_write; 74 long hammer2_ioa_file_read; 75 long hammer2_ioa_meta_read; 76 long hammer2_ioa_indr_read; 77 long hammer2_ioa_fmap_write; 78 long hammer2_ioa_file_write; 79 long hammer2_ioa_meta_write; 80 long hammer2_ioa_indr_write; 81 long hammer2_ioa_volu_write; 82 83 SYSCTL_NODE(_vfs, OID_AUTO, hammer2, CTLFLAG_RW, 0, "HAMMER2 filesystem"); 84 85 SYSCTL_INT(_vfs_hammer2, OID_AUTO, debug, CTLFLAG_RW, 86 &hammer2_debug, 0, ""); 87 SYSCTL_INT(_vfs_hammer2, OID_AUTO, cluster_enable, CTLFLAG_RW, 88 &hammer2_cluster_enable, 0, ""); 89 SYSCTL_INT(_vfs_hammer2, OID_AUTO, hardlink_enable, CTLFLAG_RW, 90 &hammer2_hardlink_enable, 0, ""); 91 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_read, CTLFLAG_RW, 92 &hammer2_iod_file_read, 0, ""); 93 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_meta_read, CTLFLAG_RW, 94 &hammer2_iod_meta_read, 0, ""); 95 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_indr_read, CTLFLAG_RW, 96 &hammer2_iod_indr_read, 0, ""); 97 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_write, CTLFLAG_RW, 98 &hammer2_iod_file_write, 0, ""); 99 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_meta_write, CTLFLAG_RW, 100 &hammer2_iod_meta_write, 0, ""); 101 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_indr_write, CTLFLAG_RW, 102 &hammer2_iod_indr_write, 0, ""); 103 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_volu_write, CTLFLAG_RW, 104 &hammer2_iod_volu_write, 0, ""); 105 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, ioa_file_read, CTLFLAG_RW, 106 &hammer2_ioa_file_read, 0, ""); 107 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, ioa_meta_read, CTLFLAG_RW, 108 &hammer2_ioa_meta_read, 0, ""); 109 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, ioa_indr_read, CTLFLAG_RW, 110 &hammer2_ioa_indr_read, 0, ""); 111 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, ioa_file_write, CTLFLAG_RW, 112 &hammer2_ioa_file_write, 0, ""); 113 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, ioa_meta_write, CTLFLAG_RW, 114 &hammer2_ioa_meta_write, 0, ""); 115 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, ioa_indr_write, CTLFLAG_RW, 116 &hammer2_ioa_indr_write, 0, ""); 117 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, ioa_volu_write, CTLFLAG_RW, 118 &hammer2_ioa_volu_write, 0, ""); 119 120 static int hammer2_vfs_init(struct vfsconf *conf); 121 static int hammer2_vfs_mount(struct mount *mp, char *path, caddr_t data, 122 struct ucred *cred); 123 static int hammer2_remount(struct mount *, char *, struct vnode *, 124 struct ucred *); 125 static int hammer2_vfs_unmount(struct mount *mp, int mntflags); 126 static int hammer2_vfs_root(struct mount *mp, struct vnode **vpp); 127 static int hammer2_vfs_statfs(struct mount *mp, struct statfs *sbp, 128 struct ucred *cred); 129 static int hammer2_vfs_statvfs(struct mount *mp, struct statvfs *sbp, 130 struct ucred *cred); 131 static int hammer2_vfs_sync(struct mount *mp, int waitfor); 132 static int hammer2_vfs_vget(struct mount *mp, struct vnode *dvp, 133 ino_t ino, struct vnode **vpp); 134 static int hammer2_vfs_fhtovp(struct mount *mp, struct vnode *rootvp, 135 struct fid *fhp, struct vnode **vpp); 136 static int hammer2_vfs_vptofh(struct vnode *vp, struct fid *fhp); 137 static int hammer2_vfs_checkexp(struct mount *mp, struct sockaddr *nam, 138 int *exflagsp, struct ucred **credanonp); 139 140 static int hammer2_install_volume_header(hammer2_mount_t *hmp); 141 static int hammer2_sync_scan1(struct mount *mp, struct vnode *vp, void *data); 142 static int hammer2_sync_scan2(struct mount *mp, struct vnode *vp, void *data); 143 144 static int hammer2_rcvdmsg(kdmsg_msg_t *msg); 145 static void hammer2_autodmsg(kdmsg_msg_t *msg); 146 147 /* 148 * HAMMER2 vfs operations. 149 */ 150 static struct vfsops hammer2_vfsops = { 151 .vfs_init = hammer2_vfs_init, 152 .vfs_sync = hammer2_vfs_sync, 153 .vfs_mount = hammer2_vfs_mount, 154 .vfs_unmount = hammer2_vfs_unmount, 155 .vfs_root = hammer2_vfs_root, 156 .vfs_statfs = hammer2_vfs_statfs, 157 .vfs_statvfs = hammer2_vfs_statvfs, 158 .vfs_vget = hammer2_vfs_vget, 159 .vfs_vptofh = hammer2_vfs_vptofh, 160 .vfs_fhtovp = hammer2_vfs_fhtovp, 161 .vfs_checkexp = hammer2_vfs_checkexp 162 }; 163 164 MALLOC_DEFINE(M_HAMMER2, "HAMMER2-mount", ""); 165 166 VFS_SET(hammer2_vfsops, hammer2, 0); 167 MODULE_VERSION(hammer2, 1); 168 169 static 170 int 171 hammer2_vfs_init(struct vfsconf *conf) 172 { 173 int error; 174 175 error = 0; 176 177 if (HAMMER2_BLOCKREF_BYTES != sizeof(struct hammer2_blockref)) 178 error = EINVAL; 179 if (HAMMER2_INODE_BYTES != sizeof(struct hammer2_inode_data)) 180 error = EINVAL; 181 if (HAMMER2_VOLUME_BYTES != sizeof(struct hammer2_volume_data)) 182 error = EINVAL; 183 184 if (error) 185 kprintf("HAMMER2 structure size mismatch; cannot continue.\n"); 186 187 lockinit(&hammer2_mntlk, "mntlk", 0, 0); 188 TAILQ_INIT(&hammer2_mntlist); 189 190 return (error); 191 } 192 193 /* 194 * Mount or remount HAMMER2 fileystem from physical media 195 * 196 * mountroot 197 * mp mount point structure 198 * path NULL 199 * data <unused> 200 * cred <unused> 201 * 202 * mount 203 * mp mount point structure 204 * path path to mount point 205 * data pointer to argument structure in user space 206 * volume volume path (device@LABEL form) 207 * hflags user mount flags 208 * cred user credentials 209 * 210 * RETURNS: 0 Success 211 * !0 error number 212 */ 213 static 214 int 215 hammer2_vfs_mount(struct mount *mp, char *path, caddr_t data, 216 struct ucred *cred) 217 { 218 struct hammer2_mount_info info; 219 hammer2_pfsmount_t *pmp; 220 hammer2_mount_t *hmp; 221 hammer2_key_t lhc; 222 struct vnode *devvp; 223 struct nlookupdata nd; 224 hammer2_chain_t *parent; 225 hammer2_chain_t *schain; 226 hammer2_chain_t *rchain; 227 struct file *fp; 228 char devstr[MNAMELEN]; 229 size_t size; 230 size_t done; 231 char *dev; 232 char *label; 233 int ronly = 1; 234 int create_hmp; 235 int error; 236 237 hmp = NULL; 238 pmp = NULL; 239 dev = NULL; 240 label = NULL; 241 devvp = NULL; 242 243 kprintf("hammer2_mount\n"); 244 245 if (path == NULL) { 246 /* 247 * Root mount 248 */ 249 bzero(&info, sizeof(info)); 250 info.cluster_fd = -1; 251 return (EOPNOTSUPP); 252 } else { 253 /* 254 * Non-root mount or updating a mount 255 */ 256 error = copyin(data, &info, sizeof(info)); 257 if (error) 258 return (error); 259 260 error = copyinstr(info.volume, devstr, MNAMELEN - 1, &done); 261 if (error) 262 return (error); 263 264 /* Extract device and label */ 265 dev = devstr; 266 label = strchr(devstr, '@'); 267 if (label == NULL || 268 ((label + 1) - dev) > done) { 269 return (EINVAL); 270 } 271 *label = '\0'; 272 label++; 273 if (*label == '\0') 274 return (EINVAL); 275 276 if (mp->mnt_flag & MNT_UPDATE) { 277 /* Update mount */ 278 /* HAMMER2 implements NFS export via mountctl */ 279 hmp = MPTOHMP(mp); 280 devvp = hmp->devvp; 281 error = hammer2_remount(mp, path, devvp, cred); 282 return error; 283 } 284 } 285 286 /* 287 * PFS mount 288 * 289 * Lookup name and verify it refers to a block device. 290 */ 291 error = nlookup_init(&nd, dev, UIO_SYSSPACE, NLC_FOLLOW); 292 if (error == 0) 293 error = nlookup(&nd); 294 if (error == 0) 295 error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp); 296 nlookup_done(&nd); 297 298 if (error == 0) { 299 if (vn_isdisk(devvp, &error)) 300 error = vfs_mountedon(devvp); 301 } 302 303 /* 304 * Determine if the device has already been mounted. After this 305 * check hmp will be non-NULL if we are doing the second or more 306 * hammer2 mounts from the same device. 307 */ 308 lockmgr(&hammer2_mntlk, LK_EXCLUSIVE); 309 TAILQ_FOREACH(hmp, &hammer2_mntlist, mntentry) { 310 if (hmp->devvp == devvp) 311 break; 312 } 313 314 /* 315 * Open the device if this isn't a secondary mount 316 */ 317 if (hmp) { 318 create_hmp = 0; 319 } else { 320 create_hmp = 1; 321 if (error == 0 && vcount(devvp) > 0) 322 error = EBUSY; 323 324 /* 325 * Now open the device 326 */ 327 if (error == 0) { 328 ronly = ((mp->mnt_flag & MNT_RDONLY) != 0); 329 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 330 error = vinvalbuf(devvp, V_SAVE, 0, 0); 331 if (error == 0) { 332 error = VOP_OPEN(devvp, 333 ronly ? FREAD : FREAD | FWRITE, 334 FSCRED, NULL); 335 } 336 vn_unlock(devvp); 337 } 338 if (error && devvp) { 339 vrele(devvp); 340 devvp = NULL; 341 } 342 if (error) { 343 lockmgr(&hammer2_mntlk, LK_RELEASE); 344 return error; 345 } 346 } 347 348 /* 349 * Block device opened successfully, finish initializing the 350 * mount structure. 351 * 352 * From this point on we have to call hammer2_unmount() on failure. 353 */ 354 pmp = kmalloc(sizeof(*pmp), M_HAMMER2, M_WAITOK | M_ZERO); 355 mp->mnt_data = (qaddr_t)pmp; 356 pmp->mp = mp; 357 358 spin_init(&pmp->inum_spin); 359 RB_INIT(&pmp->inum_tree); 360 361 kmalloc_create(&pmp->mmsg, "HAMMER2-pfsmsg"); 362 kdmsg_iocom_init(&pmp->iocom, pmp, 363 KDMSG_IOCOMF_AUTOCONN | 364 KDMSG_IOCOMF_AUTOSPAN | 365 KDMSG_IOCOMF_AUTOCIRC, 366 pmp->mmsg, hammer2_rcvdmsg); 367 368 if (create_hmp) { 369 hmp = kmalloc(sizeof(*hmp), M_HAMMER2, M_WAITOK | M_ZERO); 370 hmp->ronly = ronly; 371 hmp->devvp = devvp; 372 kmalloc_create(&hmp->minode, "HAMMER2-inodes"); 373 kmalloc_create(&hmp->mchain, "HAMMER2-chains"); 374 TAILQ_INSERT_TAIL(&hammer2_mntlist, hmp, mntentry); 375 } 376 ccms_domain_init(&pmp->ccms_dom); 377 pmp->hmp = hmp; 378 ++hmp->pmp_count; 379 lockmgr(&hammer2_mntlk, LK_RELEASE); 380 kprintf("hammer2_mount hmp=%p pmpcnt=%d\n", hmp, hmp->pmp_count); 381 382 mp->mnt_flag = MNT_LOCAL; 383 mp->mnt_kern_flag |= MNTK_ALL_MPSAFE; /* all entry pts are SMP */ 384 385 if (create_hmp) { 386 /* 387 * Presetup 388 */ 389 lockinit(&hmp->alloclk, "h2alloc", 0, 0); 390 lockinit(&hmp->voldatalk, "voldata", 0, LK_CANRECURSE); 391 TAILQ_INIT(&hmp->transq); 392 393 /* 394 * vchain setup. vchain.data is special cased to NULL. 395 * vchain.refs is initialized and will never drop to 0. 396 */ 397 hmp->vchain.hmp = hmp; 398 hmp->vchain.refs = 1; 399 hmp->vchain.data = (void *)&hmp->voldata; 400 hmp->vchain.bref.type = HAMMER2_BREF_TYPE_VOLUME; 401 hmp->vchain.bref.data_off = 0 | HAMMER2_PBUFRADIX; 402 hmp->vchain.delete_tid = HAMMER2_MAX_TID; 403 hammer2_chain_core_alloc(&hmp->vchain, NULL); 404 /* hmp->vchain.u.xxx is left NULL */ 405 406 /* 407 * Install the volume header 408 */ 409 error = hammer2_install_volume_header(hmp); 410 if (error) { 411 hammer2_vfs_unmount(mp, MNT_FORCE); 412 return error; 413 } 414 } 415 416 /* 417 * required mount structure initializations 418 */ 419 mp->mnt_stat.f_iosize = HAMMER2_PBUFSIZE; 420 mp->mnt_stat.f_bsize = HAMMER2_PBUFSIZE; 421 422 mp->mnt_vstat.f_frsize = HAMMER2_PBUFSIZE; 423 mp->mnt_vstat.f_bsize = HAMMER2_PBUFSIZE; 424 425 /* 426 * Optional fields 427 */ 428 mp->mnt_iosize_max = MAXPHYS; 429 430 /* 431 * First locate the super-root inode, which is key 0 relative to the 432 * volume header's blockset. 433 * 434 * Then locate the root inode by scanning the directory keyspace 435 * represented by the label. 436 */ 437 if (create_hmp) { 438 parent = hammer2_chain_lookup_init(&hmp->vchain, 0); 439 schain = hammer2_chain_lookup(&parent, 440 HAMMER2_SROOT_KEY, HAMMER2_SROOT_KEY, 0); 441 hammer2_chain_lookup_done(parent); 442 if (schain == NULL) { 443 kprintf("hammer2_mount: invalid super-root\n"); 444 hammer2_vfs_unmount(mp, MNT_FORCE); 445 return EINVAL; 446 } 447 hammer2_chain_ref(schain); /* for hmp->schain */ 448 hmp->schain = schain; /* left locked for inode_get */ 449 hmp->sroot = hammer2_inode_get(hmp, NULL, NULL, schain); 450 hammer2_inode_ref(hmp->sroot); /* for hmp->sroot */ 451 hammer2_inode_unlock_ex(hmp->sroot, schain); 452 } else { 453 schain = hmp->schain; 454 } 455 456 /* 457 * schain only has 1 ref now for its hmp->schain assignment. 458 * Setup for lookup (which will lock it). 459 */ 460 parent = hammer2_chain_lookup_init(schain, 0); 461 lhc = hammer2_dirhash(label, strlen(label)); 462 rchain = hammer2_chain_lookup(&parent, 463 lhc, lhc + HAMMER2_DIRHASH_LOMASK, 464 0); 465 while (rchain) { 466 if (rchain->bref.type == HAMMER2_BREF_TYPE_INODE && 467 strcmp(label, rchain->data->ipdata.filename) == 0) { 468 break; 469 } 470 rchain = hammer2_chain_next(&parent, rchain, 471 lhc, lhc + HAMMER2_DIRHASH_LOMASK, 472 0); 473 } 474 hammer2_chain_lookup_done(parent); 475 if (rchain == NULL) { 476 kprintf("hammer2_mount: PFS label not found\n"); 477 hammer2_vfs_unmount(mp, MNT_FORCE); 478 return EINVAL; 479 } 480 if (rchain->flags & HAMMER2_CHAIN_MOUNTED) { 481 hammer2_chain_unlock(rchain); 482 kprintf("hammer2_mount: PFS label already mounted!\n"); 483 hammer2_vfs_unmount(mp, MNT_FORCE); 484 return EBUSY; 485 } 486 if (rchain->flags & HAMMER2_CHAIN_RECYCLE) { 487 kprintf("hammer2_mount: PFS label currently recycling\n"); 488 hammer2_vfs_unmount(mp, MNT_FORCE); 489 return EBUSY; 490 } 491 492 atomic_set_int(&rchain->flags, HAMMER2_CHAIN_MOUNTED); 493 494 /* 495 * NOTE: *_get() integrates chain's lock into the inode lock. 496 */ 497 hammer2_chain_ref(rchain); /* for pmp->rchain */ 498 pmp->rchain = rchain; /* left held & unlocked */ 499 pmp->iroot = hammer2_inode_get(hmp, pmp, NULL, rchain); 500 hammer2_inode_ref(pmp->iroot); /* ref for pmp->iroot */ 501 hammer2_inode_unlock_ex(pmp->iroot, rchain); 502 503 kprintf("iroot %p\n", pmp->iroot); 504 505 /* 506 * Ref the cluster management messaging descriptor. The mount 507 * program deals with the other end of the communications pipe. 508 */ 509 fp = holdfp(curproc->p_fd, info.cluster_fd, -1); 510 if (fp == NULL) { 511 kprintf("hammer2_mount: bad cluster_fd!\n"); 512 hammer2_vfs_unmount(mp, MNT_FORCE); 513 return EBADF; 514 } 515 hammer2_cluster_reconnect(pmp, fp); 516 517 /* 518 * Finish setup 519 */ 520 vfs_getnewfsid(mp); 521 vfs_add_vnodeops(mp, &hammer2_vnode_vops, &mp->mnt_vn_norm_ops); 522 vfs_add_vnodeops(mp, &hammer2_spec_vops, &mp->mnt_vn_spec_ops); 523 vfs_add_vnodeops(mp, &hammer2_fifo_vops, &mp->mnt_vn_fifo_ops); 524 525 copyinstr(info.volume, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size); 526 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 527 bzero(mp->mnt_stat.f_mntonname, sizeof(mp->mnt_stat.f_mntonname)); 528 copyinstr(path, mp->mnt_stat.f_mntonname, 529 sizeof(mp->mnt_stat.f_mntonname) - 1, 530 &size); 531 532 /* 533 * Initial statfs to prime mnt_stat. 534 */ 535 hammer2_vfs_statfs(mp, &mp->mnt_stat, cred); 536 537 return 0; 538 } 539 540 static 541 int 542 hammer2_remount(struct mount *mp, char *path, struct vnode *devvp, 543 struct ucred *cred) 544 { 545 return (0); 546 } 547 548 static 549 int 550 hammer2_vfs_unmount(struct mount *mp, int mntflags) 551 { 552 hammer2_pfsmount_t *pmp; 553 hammer2_mount_t *hmp; 554 int flags; 555 int error = 0; 556 int ronly = ((mp->mnt_flag & MNT_RDONLY) != 0); 557 int dumpcnt; 558 struct vnode *devvp; 559 560 pmp = MPTOPMP(mp); 561 hmp = pmp->hmp; 562 flags = 0; 563 564 if (mntflags & MNT_FORCE) 565 flags |= FORCECLOSE; 566 567 hammer2_mount_exlock(hmp); 568 569 /* 570 * If mount initialization proceeded far enough we must flush 571 * its vnodes. 572 */ 573 if (pmp->iroot) 574 error = vflush(mp, 0, flags); 575 576 if (error) { 577 hammer2_mount_unlock(hmp); 578 return error; 579 } 580 581 lockmgr(&hammer2_mntlk, LK_EXCLUSIVE); 582 --hmp->pmp_count; 583 kprintf("hammer2_unmount hmp=%p pmpcnt=%d\n", hmp, hmp->pmp_count); 584 585 /* 586 * Flush any left over chains. The voldata lock is only used 587 * to synchronize against HAMMER2_CHAIN_MODIFIED_AUX. 588 */ 589 hammer2_voldata_lock(hmp); 590 if (hmp->vchain.flags & (HAMMER2_CHAIN_MODIFIED | 591 HAMMER2_CHAIN_SUBMODIFIED)) { 592 hammer2_voldata_unlock(hmp, 0); 593 hammer2_vfs_sync(mp, MNT_WAIT); 594 } else { 595 hammer2_voldata_unlock(hmp, 0); 596 } 597 if (hmp->pmp_count == 0) { 598 if (hmp->vchain.flags & (HAMMER2_CHAIN_MODIFIED | 599 HAMMER2_CHAIN_SUBMODIFIED)) { 600 kprintf("hammer2_unmount: chains left over after " 601 "final sync\n"); 602 if (hammer2_debug & 0x0010) 603 Debugger("entered debugger"); 604 } 605 } 606 607 /* 608 * Cleanup the root and super-root chain elements (which should be 609 * clean). 610 */ 611 if (pmp->iroot) { 612 #if REPORT_REFS_ERRORS 613 if (pmp->iroot->refs != 1) 614 kprintf("PMP->IROOT %p REFS WRONG %d\n", 615 pmp->iroot, pmp->iroot->refs); 616 #else 617 KKASSERT(pmp->iroot->refs == 1); 618 #endif 619 hammer2_inode_drop(pmp->iroot); /* ref for pmp->iroot */ 620 pmp->iroot = NULL; 621 } 622 if (pmp->rchain) { 623 atomic_clear_int(&pmp->rchain->flags, HAMMER2_CHAIN_MOUNTED); 624 #if REPORT_REFS_ERRORS 625 if (pmp->rchain->refs != 1) 626 kprintf("PMP->RCHAIN %p REFS WRONG %d\n", 627 pmp->rchain, pmp->rchain->refs); 628 #else 629 KKASSERT(pmp->rchain->refs == 1); 630 #endif 631 hammer2_chain_drop(pmp->rchain); 632 pmp->rchain = NULL; 633 } 634 ccms_domain_uninit(&pmp->ccms_dom); 635 636 /* 637 * Kill cluster controller 638 */ 639 kdmsg_iocom_uninit(&pmp->iocom); 640 641 /* 642 * If no PFS's left drop the master hammer2_mount for the device. 643 */ 644 if (hmp->pmp_count == 0) { 645 if (hmp->sroot) { 646 hammer2_inode_drop(hmp->sroot); 647 hmp->sroot = NULL; 648 } 649 if (hmp->schain) { 650 #if REPORT_REFS_ERRORS 651 if (hmp->schain->refs != 1) 652 kprintf("HMP->SCHAIN %p REFS WRONG %d\n", 653 hmp->schain, hmp->schain->refs); 654 #else 655 KKASSERT(hmp->schain->refs == 1); 656 #endif 657 hammer2_chain_drop(hmp->schain); 658 hmp->schain = NULL; 659 } 660 661 /* 662 * Finish up with the device vnode 663 */ 664 if ((devvp = hmp->devvp) != NULL) { 665 vinvalbuf(devvp, (ronly ? 0 : V_SAVE), 0, 0); 666 hmp->devvp = NULL; 667 VOP_CLOSE(devvp, (ronly ? FREAD : FREAD|FWRITE)); 668 vrele(devvp); 669 devvp = NULL; 670 } 671 672 /* 673 * Final drop of embedded volume root chain to clean up 674 * vchain.core (vchain structure is not flagged ALLOCATED 675 * so it is cleaned out and then left). 676 */ 677 dumpcnt = 50; 678 hammer2_dump_chain(&hmp->vchain, 0, &dumpcnt); 679 hammer2_mount_unlock(hmp); 680 hammer2_chain_drop(&hmp->vchain); 681 } else { 682 hammer2_mount_unlock(hmp); 683 } 684 685 pmp->mp = NULL; 686 pmp->hmp = NULL; 687 mp->mnt_data = NULL; 688 689 kmalloc_destroy(&pmp->mmsg); 690 691 kfree(pmp, M_HAMMER2); 692 if (hmp->pmp_count == 0) { 693 TAILQ_REMOVE(&hammer2_mntlist, hmp, mntentry); 694 kmalloc_destroy(&hmp->minode); 695 kmalloc_destroy(&hmp->mchain); 696 kfree(hmp, M_HAMMER2); 697 } 698 lockmgr(&hammer2_mntlk, LK_RELEASE); 699 return (error); 700 } 701 702 static 703 int 704 hammer2_vfs_vget(struct mount *mp, struct vnode *dvp, 705 ino_t ino, struct vnode **vpp) 706 { 707 kprintf("hammer2_vget\n"); 708 return (EOPNOTSUPP); 709 } 710 711 static 712 int 713 hammer2_vfs_root(struct mount *mp, struct vnode **vpp) 714 { 715 hammer2_pfsmount_t *pmp; 716 hammer2_mount_t *hmp; 717 hammer2_chain_t *parent; 718 int error; 719 struct vnode *vp; 720 721 pmp = MPTOPMP(mp); 722 hmp = pmp->hmp; 723 hammer2_mount_exlock(hmp); 724 if (pmp->iroot == NULL) { 725 *vpp = NULL; 726 error = EINVAL; 727 } else { 728 parent = hammer2_inode_lock_sh(pmp->iroot); 729 vp = hammer2_igetv(pmp->iroot, &error); 730 hammer2_inode_unlock_sh(pmp->iroot, parent); 731 *vpp = vp; 732 if (vp == NULL) 733 kprintf("vnodefail\n"); 734 } 735 hammer2_mount_unlock(hmp); 736 737 return (error); 738 } 739 740 /* 741 * Filesystem status 742 * 743 * XXX incorporate ipdata->inode_quota and data_quota 744 */ 745 static 746 int 747 hammer2_vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 748 { 749 hammer2_pfsmount_t *pmp; 750 hammer2_mount_t *hmp; 751 752 pmp = MPTOPMP(mp); 753 hmp = MPTOHMP(mp); 754 755 mp->mnt_stat.f_files = pmp->inode_count; 756 mp->mnt_stat.f_ffree = 0; 757 mp->mnt_stat.f_blocks = hmp->voldata.allocator_size / HAMMER2_PBUFSIZE; 758 mp->mnt_stat.f_bfree = (hmp->voldata.allocator_size - 759 hmp->voldata.allocator_beg) / HAMMER2_PBUFSIZE; 760 mp->mnt_stat.f_bavail = mp->mnt_stat.f_bfree; 761 762 *sbp = mp->mnt_stat; 763 return (0); 764 } 765 766 static 767 int 768 hammer2_vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred) 769 { 770 hammer2_pfsmount_t *pmp; 771 hammer2_mount_t *hmp; 772 773 pmp = MPTOPMP(mp); 774 hmp = MPTOHMP(mp); 775 776 mp->mnt_vstat.f_bsize = HAMMER2_PBUFSIZE; 777 mp->mnt_vstat.f_files = pmp->inode_count; 778 mp->mnt_vstat.f_ffree = 0; 779 mp->mnt_vstat.f_blocks = hmp->voldata.allocator_size / HAMMER2_PBUFSIZE; 780 mp->mnt_vstat.f_bfree = (hmp->voldata.allocator_size - 781 hmp->voldata.allocator_beg) / HAMMER2_PBUFSIZE; 782 mp->mnt_vstat.f_bavail = mp->mnt_vstat.f_bfree; 783 784 *sbp = mp->mnt_vstat; 785 return (0); 786 } 787 788 /* 789 * Sync the entire filesystem; this is called from the filesystem syncer 790 * process periodically and whenever a user calls sync(1) on the hammer 791 * mountpoint. 792 * 793 * Currently is actually called from the syncer! \o/ 794 * 795 * This task will have to snapshot the state of the dirty inode chain. 796 * From that, it will have to make sure all of the inodes on the dirty 797 * chain have IO initiated. We make sure that io is initiated for the root 798 * block. 799 * 800 * If waitfor is set, we wait for media to acknowledge the new rootblock. 801 * 802 * THINKS: side A vs side B, to have sync not stall all I/O? 803 */ 804 static 805 int 806 hammer2_vfs_sync(struct mount *mp, int waitfor) 807 { 808 struct hammer2_sync_info info; 809 hammer2_mount_t *hmp; 810 int flags; 811 int error; 812 int i; 813 #if 0 814 int dumpcnt; 815 #endif 816 817 hmp = MPTOHMP(mp); 818 #if 0 819 if ((waitfor & MNT_LAZY) == 0) { 820 dumpcnt = 50; 821 hammer2_dump_chain(&hmp->vchain, 0, &dumpcnt); 822 } 823 #endif 824 825 flags = VMSC_GETVP; 826 if (waitfor & MNT_LAZY) 827 flags |= VMSC_ONEPASS; 828 829 hammer2_trans_init(hmp, &info.trans, HAMMER2_TRANS_ISFLUSH); 830 831 info.error = 0; 832 info.waitfor = MNT_NOWAIT; 833 vmntvnodescan(mp, flags | VMSC_NOWAIT, 834 hammer2_sync_scan1, 835 hammer2_sync_scan2, &info); 836 if (info.error == 0 && (waitfor & MNT_WAIT)) { 837 info.waitfor = waitfor; 838 vmntvnodescan(mp, flags, 839 hammer2_sync_scan1, 840 hammer2_sync_scan2, &info); 841 842 } 843 #if 0 844 if (waitfor == MNT_WAIT) { 845 /* XXX */ 846 } else { 847 /* XXX */ 848 } 849 #endif 850 /* 851 * Rollup flush. The fsyncs above basically just flushed 852 * data blocks. The flush below gets all the meta-data. 853 */ 854 hammer2_chain_lock(&hmp->vchain, HAMMER2_RESOLVE_ALWAYS); 855 if (hmp->vchain.flags & (HAMMER2_CHAIN_MODIFIED | 856 HAMMER2_CHAIN_SUBMODIFIED)) { 857 hammer2_chain_flush(&info.trans, &hmp->vchain); 858 } 859 hammer2_chain_unlock(&hmp->vchain); 860 861 error = 0; 862 863 /* 864 * We can't safely flush the volume header until we have 865 * flushed any device buffers which have built up. 866 * 867 * XXX this isn't being incremental 868 */ 869 vn_lock(hmp->devvp, LK_EXCLUSIVE | LK_RETRY); 870 error = VOP_FSYNC(hmp->devvp, MNT_WAIT, 0); 871 vn_unlock(hmp->devvp); 872 873 /* 874 * The flush code sets CHAIN_VOLUMESYNC to indicate that the 875 * volume header needs synchronization via hmp->volsync. 876 * 877 * XXX synchronize the flag & data with only this flush XXX 878 */ 879 if (error == 0 && (hmp->vchain.flags & HAMMER2_CHAIN_VOLUMESYNC)) { 880 struct buf *bp; 881 882 /* 883 * Synchronize the disk before flushing the volume 884 * header. 885 */ 886 bp = getpbuf(NULL); 887 bp->b_bio1.bio_offset = 0; 888 bp->b_bufsize = 0; 889 bp->b_bcount = 0; 890 bp->b_cmd = BUF_CMD_FLUSH; 891 bp->b_bio1.bio_done = biodone_sync; 892 bp->b_bio1.bio_flags |= BIO_SYNC; 893 vn_strategy(hmp->devvp, &bp->b_bio1); 894 biowait(&bp->b_bio1, "h2vol"); 895 relpbuf(bp, NULL); 896 897 /* 898 * Then we can safely flush the version of the volume header 899 * synchronized by the flush code. 900 */ 901 i = hmp->volhdrno + 1; 902 if (i >= HAMMER2_NUM_VOLHDRS) 903 i = 0; 904 if (i * HAMMER2_ZONE_BYTES64 + HAMMER2_SEGSIZE > 905 hmp->volsync.volu_size) { 906 i = 0; 907 } 908 kprintf("sync volhdr %d %jd\n", 909 i, (intmax_t)hmp->volsync.volu_size); 910 bp = getblk(hmp->devvp, i * HAMMER2_ZONE_BYTES64, 911 HAMMER2_PBUFSIZE, 0, 0); 912 atomic_clear_int(&hmp->vchain.flags, HAMMER2_CHAIN_VOLUMESYNC); 913 bcopy(&hmp->volsync, bp->b_data, HAMMER2_PBUFSIZE); 914 bawrite(bp); 915 hmp->volhdrno = i; 916 } 917 hammer2_trans_done(&info.trans); 918 return (error); 919 } 920 921 /* 922 * Sync passes. 923 * 924 * NOTE: We don't test SUBMODIFIED or MOVED here because the fsync code 925 * won't flush on those flags. The syncer code above will do a 926 * general meta-data flush globally that will catch these flags. 927 */ 928 static int 929 hammer2_sync_scan1(struct mount *mp, struct vnode *vp, void *data) 930 { 931 hammer2_inode_t *ip; 932 933 ip = VTOI(vp); 934 if (vp->v_type == VNON || ip == NULL || 935 ((ip->flags & HAMMER2_INODE_MODIFIED) == 0 && 936 RB_EMPTY(&vp->v_rbdirty_tree))) { 937 return(-1); 938 } 939 return(0); 940 } 941 942 static int 943 hammer2_sync_scan2(struct mount *mp, struct vnode *vp, void *data) 944 { 945 struct hammer2_sync_info *info = data; 946 hammer2_inode_t *ip; 947 hammer2_chain_t *parent; 948 int error; 949 950 ip = VTOI(vp); 951 if (vp->v_type == VNON || vp->v_type == VBAD || 952 ((ip->flags & HAMMER2_INODE_MODIFIED) == 0 && 953 RB_EMPTY(&vp->v_rbdirty_tree))) { 954 return(0); 955 } 956 957 /* 958 * VOP_FSYNC will start a new transaction so replicate some code 959 * here to do it inline (see hammer2_vop_fsync()). 960 */ 961 parent = hammer2_inode_lock_ex(ip); 962 atomic_clear_int(&ip->flags, HAMMER2_INODE_MODIFIED); 963 if (ip->vp) 964 vfsync(ip->vp, MNT_NOWAIT, 1, NULL, NULL); 965 hammer2_chain_flush(&info->trans, parent); 966 hammer2_inode_unlock_ex(ip, parent); 967 error = 0; 968 #if 0 969 error = VOP_FSYNC(vp, MNT_NOWAIT, 0); 970 #endif 971 if (error) 972 info->error = error; 973 return(0); 974 } 975 976 static 977 int 978 hammer2_vfs_vptofh(struct vnode *vp, struct fid *fhp) 979 { 980 return (0); 981 } 982 983 static 984 int 985 hammer2_vfs_fhtovp(struct mount *mp, struct vnode *rootvp, 986 struct fid *fhp, struct vnode **vpp) 987 { 988 return (0); 989 } 990 991 static 992 int 993 hammer2_vfs_checkexp(struct mount *mp, struct sockaddr *nam, 994 int *exflagsp, struct ucred **credanonp) 995 { 996 return (0); 997 } 998 999 /* 1000 * Support code for hammer2_mount(). Read, verify, and install the volume 1001 * header into the HMP 1002 * 1003 * XXX read four volhdrs and use the one with the highest TID whos CRC 1004 * matches. 1005 * 1006 * XXX check iCRCs. 1007 * 1008 * XXX For filesystems w/ less than 4 volhdrs, make sure to not write to 1009 * nonexistant locations. 1010 * 1011 * XXX Record selected volhdr and ring updates to each of 4 volhdrs 1012 */ 1013 static 1014 int 1015 hammer2_install_volume_header(hammer2_mount_t *hmp) 1016 { 1017 hammer2_volume_data_t *vd; 1018 struct buf *bp; 1019 hammer2_crc32_t crc0, crc, bcrc0, bcrc; 1020 int error_reported; 1021 int error; 1022 int valid; 1023 int i; 1024 1025 error_reported = 0; 1026 error = 0; 1027 valid = 0; 1028 bp = NULL; 1029 1030 /* 1031 * There are up to 4 copies of the volume header (syncs iterate 1032 * between them so there is no single master). We don't trust the 1033 * volu_size field so we don't know precisely how large the filesystem 1034 * is, so depend on the OS to return an error if we go beyond the 1035 * block device's EOF. 1036 */ 1037 for (i = 0; i < HAMMER2_NUM_VOLHDRS; i++) { 1038 error = bread(hmp->devvp, i * HAMMER2_ZONE_BYTES64, 1039 HAMMER2_VOLUME_BYTES, &bp); 1040 if (error) { 1041 brelse(bp); 1042 bp = NULL; 1043 continue; 1044 } 1045 1046 vd = (struct hammer2_volume_data *) bp->b_data; 1047 if ((vd->magic != HAMMER2_VOLUME_ID_HBO) && 1048 (vd->magic != HAMMER2_VOLUME_ID_ABO)) { 1049 brelse(bp); 1050 bp = NULL; 1051 continue; 1052 } 1053 1054 if (vd->magic == HAMMER2_VOLUME_ID_ABO) { 1055 /* XXX: Reversed-endianness filesystem */ 1056 kprintf("hammer2: reverse-endian filesystem detected"); 1057 brelse(bp); 1058 bp = NULL; 1059 continue; 1060 } 1061 1062 crc = vd->icrc_sects[HAMMER2_VOL_ICRC_SECT0]; 1063 crc0 = hammer2_icrc32(bp->b_data + HAMMER2_VOLUME_ICRC0_OFF, 1064 HAMMER2_VOLUME_ICRC0_SIZE); 1065 bcrc = vd->icrc_sects[HAMMER2_VOL_ICRC_SECT1]; 1066 bcrc0 = hammer2_icrc32(bp->b_data + HAMMER2_VOLUME_ICRC1_OFF, 1067 HAMMER2_VOLUME_ICRC1_SIZE); 1068 if ((crc0 != crc) || (bcrc0 != bcrc)) { 1069 kprintf("hammer2 volume header crc " 1070 "mismatch copy #%d %08x/%08x\n", 1071 i, crc0, crc); 1072 error_reported = 1; 1073 brelse(bp); 1074 bp = NULL; 1075 continue; 1076 } 1077 if (valid == 0 || hmp->voldata.mirror_tid < vd->mirror_tid) { 1078 valid = 1; 1079 hmp->voldata = *vd; 1080 hmp->volhdrno = i; 1081 } 1082 brelse(bp); 1083 bp = NULL; 1084 } 1085 if (valid) { 1086 hmp->volsync = hmp->voldata; 1087 error = 0; 1088 if (error_reported || bootverbose || 1) { /* 1/DEBUG */ 1089 kprintf("hammer2: using volume header #%d\n", 1090 hmp->volhdrno); 1091 } 1092 } else { 1093 error = EINVAL; 1094 kprintf("hammer2: no valid volume headers found!\n"); 1095 } 1096 return (error); 1097 } 1098 1099 /* 1100 * Reconnect using the passed file pointer. The caller must ref the 1101 * fp for us. 1102 */ 1103 void 1104 hammer2_cluster_reconnect(hammer2_pfsmount_t *pmp, struct file *fp) 1105 { 1106 hammer2_inode_data_t *ipdata; 1107 hammer2_chain_t *parent; 1108 size_t name_len; 1109 1110 /* 1111 * Closes old comm descriptor, kills threads, cleans up 1112 * states, then installs the new descriptor and creates 1113 * new threads. 1114 */ 1115 kdmsg_iocom_reconnect(&pmp->iocom, fp, "hammer2"); 1116 1117 /* 1118 * Setup LNK_CONN fields for autoinitiated state machine 1119 */ 1120 parent = hammer2_inode_lock_ex(pmp->iroot); 1121 ipdata = &parent->data->ipdata; 1122 pmp->iocom.auto_lnk_conn.pfs_clid = ipdata->pfs_clid; 1123 pmp->iocom.auto_lnk_conn.pfs_fsid = ipdata->pfs_fsid; 1124 pmp->iocom.auto_lnk_conn.pfs_type = ipdata->pfs_type; 1125 pmp->iocom.auto_lnk_conn.proto_version = DMSG_SPAN_PROTO_1; 1126 pmp->iocom.auto_lnk_conn.peer_type = pmp->hmp->voldata.peer_type; 1127 1128 /* 1129 * Filter adjustment. Clients do not need visibility into other 1130 * clients (otherwise millions of clients would present a serious 1131 * problem). The fs_label also serves to restrict the namespace. 1132 */ 1133 pmp->iocom.auto_lnk_conn.peer_mask = 1LLU << HAMMER2_PEER_HAMMER2; 1134 pmp->iocom.auto_lnk_conn.pfs_mask = (uint64_t)-1; 1135 switch (ipdata->pfs_type) { 1136 case DMSG_PFSTYPE_CLIENT: 1137 pmp->iocom.auto_lnk_conn.peer_mask &= 1138 ~(1LLU << DMSG_PFSTYPE_CLIENT); 1139 break; 1140 default: 1141 break; 1142 } 1143 1144 name_len = ipdata->name_len; 1145 if (name_len >= sizeof(pmp->iocom.auto_lnk_conn.fs_label)) 1146 name_len = sizeof(pmp->iocom.auto_lnk_conn.fs_label) - 1; 1147 bcopy(ipdata->filename, 1148 pmp->iocom.auto_lnk_conn.fs_label, 1149 name_len); 1150 pmp->iocom.auto_lnk_conn.fs_label[name_len] = 0; 1151 1152 /* 1153 * Setup LNK_SPAN fields for autoinitiated state machine 1154 */ 1155 pmp->iocom.auto_lnk_span.pfs_clid = ipdata->pfs_clid; 1156 pmp->iocom.auto_lnk_span.pfs_fsid = ipdata->pfs_fsid; 1157 pmp->iocom.auto_lnk_span.pfs_type = ipdata->pfs_type; 1158 pmp->iocom.auto_lnk_span.peer_type = pmp->hmp->voldata.peer_type; 1159 pmp->iocom.auto_lnk_span.proto_version = DMSG_SPAN_PROTO_1; 1160 name_len = ipdata->name_len; 1161 if (name_len >= sizeof(pmp->iocom.auto_lnk_span.fs_label)) 1162 name_len = sizeof(pmp->iocom.auto_lnk_span.fs_label) - 1; 1163 bcopy(ipdata->filename, 1164 pmp->iocom.auto_lnk_span.fs_label, 1165 name_len); 1166 pmp->iocom.auto_lnk_span.fs_label[name_len] = 0; 1167 hammer2_inode_unlock_ex(pmp->iroot, parent); 1168 1169 kdmsg_iocom_autoinitiate(&pmp->iocom, hammer2_autodmsg); 1170 } 1171 1172 static int 1173 hammer2_rcvdmsg(kdmsg_msg_t *msg) 1174 { 1175 switch(msg->any.head.cmd & DMSGF_TRANSMASK) { 1176 case DMSG_DBG_SHELL: 1177 /* 1178 * (non-transaction) 1179 * Execute shell command (not supported atm) 1180 */ 1181 kdmsg_msg_reply(msg, DMSG_ERR_NOSUPP); 1182 break; 1183 case DMSG_DBG_SHELL | DMSGF_REPLY: 1184 /* 1185 * (non-transaction) 1186 */ 1187 if (msg->aux_data) { 1188 msg->aux_data[msg->aux_size - 1] = 0; 1189 kprintf("HAMMER2 DBG: %s\n", msg->aux_data); 1190 } 1191 break; 1192 default: 1193 /* 1194 * Unsupported message received. We only need to 1195 * reply if it's a transaction in order to close our end. 1196 * Ignore any one-way messages are any further messages 1197 * associated with the transaction. 1198 * 1199 * NOTE: This case also includes DMSG_LNK_ERROR messages 1200 * which might be one-way, replying to those would 1201 * cause an infinite ping-pong. 1202 */ 1203 if (msg->any.head.cmd & DMSGF_CREATE) 1204 kdmsg_msg_reply(msg, DMSG_ERR_NOSUPP); 1205 break; 1206 } 1207 return(0); 1208 } 1209 1210 /* 1211 * This function is called after KDMSG has automatically handled processing 1212 * of a LNK layer message (typically CONN, SPAN, or CIRC). 1213 * 1214 * We tag off the LNK_CONN to trigger our LNK_VOLCONF messages which 1215 * advertises all available hammer2 super-root volumes. 1216 */ 1217 static void 1218 hammer2_autodmsg(kdmsg_msg_t *msg) 1219 { 1220 hammer2_pfsmount_t *pmp = msg->iocom->handle; 1221 hammer2_mount_t *hmp = pmp->hmp; 1222 int copyid; 1223 1224 /* 1225 * We only care about replies to our LNK_CONN auto-request. kdmsg 1226 * has already processed the reply, we use this calback as a shim 1227 * to know when we can advertise available super-root volumes. 1228 */ 1229 if ((msg->any.head.cmd & DMSGF_TRANSMASK) != 1230 (DMSG_LNK_CONN | DMSGF_CREATE | DMSGF_REPLY) || 1231 msg->state == NULL) { 1232 return; 1233 } 1234 1235 kprintf("LNK_CONN REPLY RECEIVED CMD %08x\n", msg->any.head.cmd); 1236 1237 if (msg->any.head.cmd & DMSGF_CREATE) { 1238 kprintf("HAMMER2: VOLDATA DUMP\n"); 1239 1240 /* 1241 * Dump the configuration stored in the volume header 1242 */ 1243 hammer2_voldata_lock(hmp); 1244 for (copyid = 0; copyid < HAMMER2_COPYID_COUNT; ++copyid) { 1245 if (hmp->voldata.copyinfo[copyid].copyid == 0) 1246 continue; 1247 hammer2_volconf_update(pmp, copyid); 1248 } 1249 hammer2_voldata_unlock(hmp, 0); 1250 } 1251 if ((msg->any.head.cmd & DMSGF_DELETE) && 1252 msg->state && (msg->state->txcmd & DMSGF_DELETE) == 0) { 1253 kprintf("HAMMER2: CONN WAS TERMINATED\n"); 1254 } 1255 } 1256 1257 /* 1258 * Volume configuration updates are passed onto the userland service 1259 * daemon via the open LNK_CONN transaction. 1260 */ 1261 void 1262 hammer2_volconf_update(hammer2_pfsmount_t *pmp, int index) 1263 { 1264 hammer2_mount_t *hmp = pmp->hmp; 1265 kdmsg_msg_t *msg; 1266 1267 /* XXX interlock against connection state termination */ 1268 kprintf("volconf update %p\n", pmp->iocom.conn_state); 1269 if (pmp->iocom.conn_state) { 1270 kprintf("TRANSMIT VOLCONF VIA OPEN CONN TRANSACTION\n"); 1271 msg = kdmsg_msg_alloc_state(pmp->iocom.conn_state, 1272 DMSG_LNK_VOLCONF, NULL, NULL); 1273 msg->any.lnk_volconf.copy = hmp->voldata.copyinfo[index]; 1274 msg->any.lnk_volconf.mediaid = hmp->voldata.fsid; 1275 msg->any.lnk_volconf.index = index; 1276 kdmsg_msg_write(msg); 1277 } 1278 } 1279 1280 void 1281 hammer2_dump_chain(hammer2_chain_t *chain, int tab, int *countp) 1282 { 1283 hammer2_chain_t *scan; 1284 1285 --*countp; 1286 if (*countp == 0) { 1287 kprintf("%*.*s...\n", tab, tab, ""); 1288 return; 1289 } 1290 if (*countp < 0) 1291 return; 1292 kprintf("%*.*schain[%d] %p.%d [%08x][core=%p] (%s) dl=%p dt=%s refs=%d", 1293 tab, tab, "", 1294 chain->index, chain, chain->bref.type, chain->flags, 1295 chain->core, 1296 ((chain->bref.type == HAMMER2_BREF_TYPE_INODE && 1297 chain->data) ? (char *)chain->data->ipdata.filename : "?"), 1298 chain->next_parent, 1299 (chain->delete_tid == HAMMER2_MAX_TID ? "max" : "fls"), 1300 chain->refs); 1301 if (chain->core == NULL || RB_EMPTY(&chain->core->rbtree)) 1302 kprintf("\n"); 1303 else 1304 kprintf(" {\n"); 1305 RB_FOREACH(scan, hammer2_chain_tree, &chain->core->rbtree) { 1306 hammer2_dump_chain(scan, tab + 4, countp); 1307 } 1308 if (chain->core && !RB_EMPTY(&chain->core->rbtree)) { 1309 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE && chain->data) 1310 kprintf("%*.*s}(%s)\n", tab, tab, "", 1311 chain->data->ipdata.filename); 1312 else 1313 kprintf("%*.*s}\n", tab, tab, ""); 1314 } 1315 } 1316