1 /* 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2022 Tomohiro Kusumi <tkusumi@netbsd.org> 5 * Copyright (c) 2011-2022 The DragonFly Project. All rights reserved. 6 * 7 * This code is derived from software contributed to The DragonFly Project 8 * by Matthew Dillon <dillon@dragonflybsd.org> 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 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 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 3. Neither the name of The DragonFly Project nor the names of its 21 * contributors may be used to endorse or promote products derived 22 * from this software without specific, prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 25 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 26 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 27 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 28 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 29 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 30 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 31 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 32 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 33 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 34 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 /* 38 * Kernel Filesystem interface 39 * 40 * NOTE! local ipdata pointers must be reloaded on any modifying operation 41 * to the inode as its underlying chain may have changed. 42 */ 43 44 /* 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/fcntl.h> 49 #include <sys/buf.h> 50 #include <sys/proc.h> 51 #include <sys/mount.h> 52 #include <sys/vnode.h> 53 #include <sys/mountctl.h> 54 #include <sys/dirent.h> 55 #include <sys/uio.h> 56 #include <sys/objcache.h> 57 #include <sys/event.h> 58 #include <sys/file.h> 59 #include <vfs/fifofs/fifo.h> 60 */ 61 62 #include "hammer2.h" 63 64 static int hammer2_read_file(hammer2_inode_t *ip, struct uio *uio, 65 int seqcount); 66 static int hammer2_write_file(hammer2_inode_t *ip, struct uio *uio, 67 int ioflag, int seqcount); 68 static void hammer2_extend_file(hammer2_inode_t *ip, hammer2_key_t nsize); 69 static void hammer2_truncate_file(hammer2_inode_t *ip, hammer2_key_t nsize); 70 71 /* 72 * Last reference to a vnode is going away but it is still cached. 73 */ 74 static 75 int 76 hammer2_vop_inactive(struct vop_inactive_args *ap) 77 { 78 #if 0 79 hammer2_inode_t *ip; 80 struct m_vnode *vp; 81 82 vp = ap->a_vp; 83 ip = VTOI(vp); 84 85 /* 86 * Degenerate case 87 */ 88 if (ip == NULL) { 89 vrecycle(vp); 90 return (0); 91 } 92 93 /* 94 * Aquire the inode lock to interlock against vp updates via 95 * the inode path and file deletions and such (which can be 96 * namespace-only operations that might not hold the vnode). 97 */ 98 hammer2_inode_lock(ip, 0); 99 if (ip->flags & HAMMER2_INODE_ISUNLINKED) { 100 hammer2_key_t lbase; 101 int nblksize; 102 103 /* 104 * If the inode has been unlinked we can throw away all 105 * buffers (dirty or not) and clean the file out. 106 * 107 * Because vrecycle() calls are not guaranteed, try to 108 * dispose of the inode as much as possible right here. 109 */ 110 nblksize = hammer2_calc_logical(ip, 0, &lbase, NULL); 111 nvtruncbuf(vp, 0, nblksize, 0, 0); 112 113 /* 114 * Delete the file on-media. 115 */ 116 if ((ip->flags & HAMMER2_INODE_DELETING) == 0) { 117 atomic_set_int(&ip->flags, HAMMER2_INODE_DELETING); 118 hammer2_inode_delayed_sideq(ip); 119 } 120 hammer2_inode_unlock(ip); 121 122 /* 123 * Recycle immediately if possible 124 */ 125 vrecycle(vp); 126 } else { 127 hammer2_inode_unlock(ip); 128 } 129 return (0); 130 #endif 131 return (EOPNOTSUPP); 132 } 133 134 /* 135 * Reclaim a vnode so that it can be reused; after the inode is 136 * disassociated, the filesystem must manage it alone. 137 */ 138 static 139 int 140 hammer2_vop_reclaim(struct vop_reclaim_args *ap) 141 { 142 hammer2_inode_t *ip; 143 struct m_vnode *vp; 144 145 vp = ap->a_vp; 146 ip = VTOI(vp); 147 if (ip == NULL) 148 return(0); 149 150 /* 151 * NOTE! We do not attempt to flush chains here, flushing is 152 * really fragile and could also deadlock. 153 */ 154 vclrisdirty(vp); 155 156 /* 157 * The inode lock is required to disconnect it. 158 */ 159 hammer2_inode_lock(ip, 0); 160 vp->v_data = NULL; 161 ip->vp = NULL; 162 163 /* 164 * Delete the file on-media. This should have been handled by the 165 * inactivation. The operation is likely still queued on the inode 166 * though so only complain if the stars don't align. 167 */ 168 if ((ip->flags & (HAMMER2_INODE_ISUNLINKED | HAMMER2_INODE_DELETING)) == 169 HAMMER2_INODE_ISUNLINKED) 170 { 171 assert(0); 172 atomic_set_int(&ip->flags, HAMMER2_INODE_DELETING); 173 hammer2_inode_delayed_sideq(ip); 174 kprintf("hammer2: vp=%p ip=%p unlinked but not disposed\n", 175 vp, ip); 176 } 177 hammer2_inode_unlock(ip); 178 179 /* 180 * Modified inodes will already be on SIDEQ or SYNCQ, no further 181 * action is needed. 182 * 183 * We cannot safely synchronize the inode from inside the reclaim 184 * due to potentially deep locks held as-of when the reclaim occurs. 185 * Interactions and potential deadlocks abound. We also can't do it 186 * here without desynchronizing from the related directory entrie(s). 187 */ 188 hammer2_inode_drop(ip); /* vp ref */ 189 190 /* 191 * XXX handle background sync when ip dirty, kernel will no longer 192 * notify us regarding this inode because there is no longer a 193 * vnode attached to it. 194 */ 195 196 return (0); 197 } 198 199 int 200 hammer2_reclaim(struct m_vnode *vp) 201 { 202 struct vop_reclaim_args ap = { 203 .a_vp = vp, 204 }; 205 206 return hammer2_vop_reclaim(&ap); 207 } 208 209 /* 210 * Currently this function synchronizes the front-end inode state to the 211 * backend chain topology, then flushes the inode's chain and sub-topology 212 * to backend media. This function does not flush the root topology down to 213 * the inode. 214 */ 215 static 216 int 217 hammer2_vop_fsync(struct vop_fsync_args *ap) 218 { 219 #if 0 220 hammer2_inode_t *ip; 221 struct m_vnode *vp; 222 int error1; 223 int error2; 224 225 vp = ap->a_vp; 226 ip = VTOI(vp); 227 error1 = 0; 228 229 hammer2_trans_init(ip->pmp, 0); 230 231 /* 232 * Flush dirty buffers in the file's logical buffer cache. 233 * It is best to wait for the strategy code to commit the 234 * buffers to the device's backing buffer cache before 235 * then trying to flush the inode. 236 * 237 * This should be quick, but certain inode modifications cached 238 * entirely in the hammer2_inode structure may not trigger a 239 * buffer read until the flush so the fsync can wind up also 240 * doing scattered reads. 241 */ 242 vfsync(vp, ap->a_waitfor, 1, NULL, NULL); 243 bio_track_wait(&vp->v_track_write, 0, 0); 244 245 /* 246 * Flush any inode changes 247 */ 248 hammer2_inode_lock(ip, 0); 249 if (ip->flags & (HAMMER2_INODE_RESIZED|HAMMER2_INODE_MODIFIED)) 250 error1 = hammer2_inode_chain_sync(ip); 251 252 /* 253 * Flush dirty chains related to the inode. 254 * 255 * NOTE! We are not in a flush transaction. The inode remains on 256 * the sideq so the filesystem syncer can synchronize it to 257 * the volume root. 258 */ 259 error2 = hammer2_inode_chain_flush(ip, HAMMER2_XOP_INODE_STOP); 260 if (error2) 261 error1 = error2; 262 263 /* 264 * We may be able to clear the vnode dirty flag. 265 */ 266 if ((ip->flags & (HAMMER2_INODE_MODIFIED | 267 HAMMER2_INODE_RESIZED | 268 HAMMER2_INODE_DIRTYDATA)) == 0 && 269 RB_EMPTY(&vp->v_rbdirty_tree) && 270 !bio_track_active(&vp->v_track_write)) { 271 vclrisdirty(vp); 272 } 273 hammer2_inode_unlock(ip); 274 hammer2_trans_done(ip->pmp, 0); 275 276 return (error1); 277 #endif 278 return (EOPNOTSUPP); 279 } 280 281 /* 282 * No lock needed, just handle ip->update 283 */ 284 static 285 int 286 hammer2_vop_access(struct vop_access_args *ap) 287 { 288 #if 0 289 hammer2_inode_t *ip = VTOI(ap->a_vp); 290 uid_t uid; 291 gid_t gid; 292 mode_t mode; 293 uint32_t uflags; 294 int error; 295 int update; 296 297 retry: 298 update = spin_access_start(&ip->cluster_spin); 299 300 /*hammer2_inode_lock(ip, HAMMER2_RESOLVE_SHARED);*/ 301 uid = hammer2_to_unix_xid(&ip->meta.uid); 302 gid = hammer2_to_unix_xid(&ip->meta.gid); 303 mode = ip->meta.mode; 304 uflags = ip->meta.uflags; 305 /*hammer2_inode_unlock(ip);*/ 306 307 if (__predict_false(spin_access_end(&ip->cluster_spin, update))) 308 goto retry; 309 310 error = vop_helper_access(ap, uid, gid, mode, uflags); 311 312 return (error); 313 #endif 314 return (EOPNOTSUPP); 315 } 316 317 static 318 int 319 hammer2_vop_getattr(struct vop_getattr_args *ap) 320 { 321 #if 0 322 hammer2_pfs_t *pmp; 323 hammer2_inode_t *ip; 324 struct m_vnode *vp; 325 struct vattr *vap; 326 int update; 327 328 vp = ap->a_vp; 329 vap = ap->a_vap; 330 331 ip = VTOI(vp); 332 pmp = ip->pmp; 333 334 retry: 335 update = spin_access_start(&ip->cluster_spin); 336 337 vap->va_fsid = pmp->mp->mnt_stat.f_fsid.val[0]; 338 vap->va_fileid = ip->meta.inum; 339 vap->va_mode = ip->meta.mode; 340 vap->va_nlink = ip->meta.nlinks; 341 vap->va_uid = hammer2_to_unix_xid(&ip->meta.uid); 342 vap->va_gid = hammer2_to_unix_xid(&ip->meta.gid); 343 vap->va_rmajor = 0; 344 vap->va_rminor = 0; 345 vap->va_size = ip->meta.size; /* protected by shared lock */ 346 vap->va_blocksize = HAMMER2_PBUFSIZE; 347 vap->va_flags = ip->meta.uflags; 348 hammer2_time_to_timespec(ip->meta.ctime, &vap->va_ctime); 349 hammer2_time_to_timespec(ip->meta.mtime, &vap->va_mtime); 350 hammer2_time_to_timespec(ip->meta.mtime, &vap->va_atime); 351 vap->va_gen = 1; 352 vap->va_bytes = 0; 353 if (ip->meta.type == HAMMER2_OBJTYPE_DIRECTORY) { 354 /* 355 * Can't really calculate directory use sans the files under 356 * it, just assume one block for now. 357 */ 358 vap->va_bytes += HAMMER2_INODE_BYTES; 359 } else { 360 vap->va_bytes = hammer2_inode_data_count(ip); 361 } 362 vap->va_type = hammer2_get_vtype(ip->meta.type); 363 vap->va_filerev = 0; 364 vap->va_uid_uuid = ip->meta.uid; 365 vap->va_gid_uuid = ip->meta.gid; 366 vap->va_vaflags = VA_UID_UUID_VALID | VA_GID_UUID_VALID | 367 VA_FSID_UUID_VALID; 368 369 if (__predict_false(spin_access_end(&ip->cluster_spin, update))) 370 goto retry; 371 372 return (0); 373 #endif 374 return (EOPNOTSUPP); 375 } 376 377 static 378 int 379 hammer2_vop_getattr_lite(struct vop_getattr_lite_args *ap) 380 { 381 #if 0 382 hammer2_pfs_t *pmp; 383 hammer2_inode_t *ip; 384 struct m_vnode *vp; 385 struct vattr_lite *lvap; 386 int update; 387 388 vp = ap->a_vp; 389 lvap = ap->a_lvap; 390 391 ip = VTOI(vp); 392 pmp = ip->pmp; 393 394 retry: 395 update = spin_access_start(&ip->cluster_spin); 396 397 #if 0 398 vap->va_fsid = pmp->mp->mnt_stat.f_fsid.val[0]; 399 vap->va_fileid = ip->meta.inum; 400 #endif 401 lvap->va_mode = ip->meta.mode; 402 lvap->va_nlink = ip->meta.nlinks; 403 lvap->va_uid = hammer2_to_unix_xid(&ip->meta.uid); 404 lvap->va_gid = hammer2_to_unix_xid(&ip->meta.gid); 405 #if 0 406 vap->va_rmajor = 0; 407 vap->va_rminor = 0; 408 #endif 409 lvap->va_size = ip->meta.size; 410 #if 0 411 vap->va_blocksize = HAMMER2_PBUFSIZE; 412 #endif 413 lvap->va_flags = ip->meta.uflags; 414 lvap->va_type = hammer2_get_vtype(ip->meta.type); 415 #if 0 416 vap->va_filerev = 0; 417 vap->va_uid_uuid = ip->meta.uid; 418 vap->va_gid_uuid = ip->meta.gid; 419 vap->va_vaflags = VA_UID_UUID_VALID | VA_GID_UUID_VALID | 420 VA_FSID_UUID_VALID; 421 #endif 422 423 if (__predict_false(spin_access_end(&ip->cluster_spin, update))) 424 goto retry; 425 426 return (0); 427 #endif 428 return (EOPNOTSUPP); 429 } 430 431 static 432 int 433 hammer2_vop_setattr(struct vop_setattr_args *ap) 434 { 435 #if 0 436 hammer2_inode_t *ip; 437 struct m_vnode *vp; 438 struct vattr *vap; 439 int error; 440 int kflags = 0; 441 uint64_t ctime; 442 443 vp = ap->a_vp; 444 vap = ap->a_vap; 445 hammer2_update_time(&ctime); 446 447 ip = VTOI(vp); 448 449 if (ip->pmp->ronly) 450 return (EROFS); 451 452 /* 453 * Normally disallow setattr if there is no space, unless we 454 * are in emergency mode (might be needed to chflags -R noschg 455 * files prior to removal). 456 */ 457 if ((ip->pmp->flags & HAMMER2_PMPF_EMERG) == 0 && 458 hammer2_vfs_enospace(ip, 0, ap->a_cred) > 1) { 459 return (ENOSPC); 460 } 461 462 hammer2_trans_init(ip->pmp, 0); 463 hammer2_inode_lock(ip, 0); 464 error = 0; 465 466 if (vap->va_flags != VNOVAL) { 467 uint32_t flags; 468 469 flags = ip->meta.uflags; 470 error = vop_helper_setattr_flags(&flags, vap->va_flags, 471 hammer2_to_unix_xid(&ip->meta.uid), 472 ap->a_cred); 473 if (error == 0) { 474 if (ip->meta.uflags != flags) { 475 hammer2_inode_modify(ip); 476 hammer2_spin_lock_update(&ip->cluster_spin); 477 ip->meta.uflags = flags; 478 ip->meta.ctime = ctime; 479 hammer2_spin_unlock_update(&ip->cluster_spin); 480 kflags |= NOTE_ATTRIB; 481 } 482 if (ip->meta.uflags & (IMMUTABLE | APPEND)) { 483 error = 0; 484 goto done; 485 } 486 } 487 goto done; 488 } 489 if (ip->meta.uflags & (IMMUTABLE | APPEND)) { 490 error = EPERM; 491 goto done; 492 } 493 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 494 mode_t cur_mode = ip->meta.mode; 495 uid_t cur_uid = hammer2_to_unix_xid(&ip->meta.uid); 496 gid_t cur_gid = hammer2_to_unix_xid(&ip->meta.gid); 497 uuid_t uuid_uid; 498 uuid_t uuid_gid; 499 500 error = vop_helper_chown(ap->a_vp, vap->va_uid, vap->va_gid, 501 ap->a_cred, 502 &cur_uid, &cur_gid, &cur_mode); 503 if (error == 0) { 504 hammer2_guid_to_uuid(&uuid_uid, cur_uid); 505 hammer2_guid_to_uuid(&uuid_gid, cur_gid); 506 if (bcmp(&uuid_uid, &ip->meta.uid, sizeof(uuid_uid)) || 507 bcmp(&uuid_gid, &ip->meta.gid, sizeof(uuid_gid)) || 508 ip->meta.mode != cur_mode 509 ) { 510 hammer2_inode_modify(ip); 511 hammer2_spin_lock_update(&ip->cluster_spin); 512 ip->meta.uid = uuid_uid; 513 ip->meta.gid = uuid_gid; 514 ip->meta.mode = cur_mode; 515 ip->meta.ctime = ctime; 516 hammer2_spin_unlock_update(&ip->cluster_spin); 517 } 518 kflags |= NOTE_ATTRIB; 519 } 520 } 521 522 /* 523 * Resize the file 524 */ 525 if (vap->va_size != VNOVAL && ip->meta.size != vap->va_size) { 526 switch(vp->v_type) { 527 case VREG: 528 if (vap->va_size == ip->meta.size) 529 break; 530 if (vap->va_size < ip->meta.size) { 531 hammer2_mtx_ex(&ip->truncate_lock); 532 hammer2_truncate_file(ip, vap->va_size); 533 hammer2_mtx_unlock(&ip->truncate_lock); 534 kflags |= NOTE_WRITE; 535 } else { 536 hammer2_extend_file(ip, vap->va_size); 537 kflags |= NOTE_WRITE | NOTE_EXTEND; 538 } 539 hammer2_inode_modify(ip); 540 ip->meta.mtime = ctime; 541 vclrflags(vp, VLASTWRITETS); 542 break; 543 default: 544 error = EINVAL; 545 goto done; 546 } 547 } 548 #if 0 549 /* atime not supported */ 550 if (vap->va_atime.tv_sec != VNOVAL) { 551 hammer2_inode_modify(ip); 552 ip->meta.atime = hammer2_timespec_to_time(&vap->va_atime); 553 kflags |= NOTE_ATTRIB; 554 } 555 #endif 556 if (vap->va_mode != (mode_t)VNOVAL) { 557 mode_t cur_mode = ip->meta.mode; 558 uid_t cur_uid = hammer2_to_unix_xid(&ip->meta.uid); 559 gid_t cur_gid = hammer2_to_unix_xid(&ip->meta.gid); 560 561 error = vop_helper_chmod(ap->a_vp, vap->va_mode, ap->a_cred, 562 cur_uid, cur_gid, &cur_mode); 563 if (error == 0) { 564 hammer2_inode_modify(ip); 565 hammer2_spin_lock_update(&ip->cluster_spin); 566 ip->meta.mode = cur_mode; 567 ip->meta.ctime = ctime; 568 hammer2_spin_unlock_update(&ip->cluster_spin); 569 kflags |= NOTE_ATTRIB; 570 } 571 } 572 573 if (vap->va_mtime.tv_sec != VNOVAL) { 574 hammer2_inode_modify(ip); 575 ip->meta.mtime = hammer2_timespec_to_time(&vap->va_mtime); 576 kflags |= NOTE_ATTRIB; 577 vclrflags(vp, VLASTWRITETS); 578 } 579 580 done: 581 /* 582 * If a truncation occurred we must call chain_sync() now in order 583 * to trim the related data chains, otherwise a later expansion can 584 * cause havoc. 585 * 586 * If an extend occured that changed the DIRECTDATA state, we must 587 * call inode_chain_sync now in order to prepare the inode's indirect 588 * block table. 589 * 590 * WARNING! This means we are making an adjustment to the inode's 591 * chain outside of sync/fsync, and not just to inode->meta, which 592 * may result in some consistency issues if a crash were to occur 593 * at just the wrong time. 594 */ 595 if (ip->flags & HAMMER2_INODE_RESIZED) 596 hammer2_inode_chain_sync(ip); 597 598 /* 599 * Cleanup. 600 */ 601 hammer2_inode_unlock(ip); 602 hammer2_trans_done(ip->pmp, HAMMER2_TRANS_SIDEQ); 603 hammer2_knote(ip->vp, kflags); 604 605 return (error); 606 #endif 607 return (EOPNOTSUPP); 608 } 609 610 static 611 int 612 hammer2_vop_readdir(struct vop_readdir_args *ap) 613 { 614 #if 0 615 hammer2_xop_readdir_t *xop; 616 hammer2_blockref_t bref; 617 hammer2_inode_t *ip; 618 hammer2_tid_t inum; 619 hammer2_key_t lkey; 620 struct uio *uio; 621 off_t *cookies; 622 off_t saveoff; 623 int cookie_index; 624 int ncookies; 625 int error; 626 int eofflag; 627 int r; 628 629 ip = VTOI(ap->a_vp); 630 uio = ap->a_uio; 631 saveoff = uio->uio_offset; 632 eofflag = 0; 633 error = 0; 634 635 /* 636 * Setup cookies directory entry cookies if requested 637 */ 638 if (ap->a_ncookies) { 639 ncookies = uio->uio_resid / 16 + 1; 640 if (ncookies > 1024) 641 ncookies = 1024; 642 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK); 643 } else { 644 ncookies = -1; 645 cookies = NULL; 646 } 647 cookie_index = 0; 648 649 hammer2_inode_lock(ip, HAMMER2_RESOLVE_SHARED); 650 651 /* 652 * Handle artificial entries. To ensure that only positive 64 bit 653 * quantities are returned to userland we always strip off bit 63. 654 * The hash code is designed such that codes 0x0000-0x7FFF are not 655 * used, allowing us to use these codes for articial entries. 656 * 657 * Entry 0 is used for '.' and entry 1 is used for '..'. Do not 658 * allow '..' to cross the mount point into (e.g.) the super-root. 659 */ 660 if (saveoff == 0) { 661 inum = ip->meta.inum & HAMMER2_DIRHASH_USERMSK; 662 r = vop_write_dirent(&error, uio, inum, DT_DIR, 1, "."); 663 if (r) 664 goto done; 665 if (cookies) 666 cookies[cookie_index] = saveoff; 667 ++saveoff; 668 ++cookie_index; 669 if (cookie_index == ncookies) 670 goto done; 671 } 672 673 if (saveoff == 1) { 674 inum = ip->meta.inum & HAMMER2_DIRHASH_USERMSK; 675 if (ip != ip->pmp->iroot) 676 inum = ip->meta.iparent & HAMMER2_DIRHASH_USERMSK; 677 r = vop_write_dirent(&error, uio, inum, DT_DIR, 2, ".."); 678 if (r) 679 goto done; 680 if (cookies) 681 cookies[cookie_index] = saveoff; 682 ++saveoff; 683 ++cookie_index; 684 if (cookie_index == ncookies) 685 goto done; 686 } 687 688 lkey = saveoff | HAMMER2_DIRHASH_VISIBLE; 689 if (hammer2_debug & 0x0020) 690 kprintf("readdir: lkey %016jx\n", lkey); 691 if (error) 692 goto done; 693 694 xop = hammer2_xop_alloc(ip, 0); 695 xop->lkey = lkey; 696 hammer2_xop_start(&xop->head, &hammer2_readdir_desc); 697 698 for (;;) { 699 const hammer2_inode_data_t *ripdata; 700 const char *dname; 701 int dtype; 702 703 error = hammer2_xop_collect(&xop->head, 0); 704 error = hammer2_error_to_errno(error); 705 if (error) { 706 break; 707 } 708 if (cookie_index == ncookies) 709 break; 710 if (hammer2_debug & 0x0020) 711 kprintf("cluster chain %p %p\n", 712 xop->head.cluster.focus, 713 (xop->head.cluster.focus ? 714 xop->head.cluster.focus->data : (void *)-1)); 715 hammer2_cluster_bref(&xop->head.cluster, &bref); 716 717 if (bref.type == HAMMER2_BREF_TYPE_INODE) { 718 ripdata = &hammer2_xop_gdata(&xop->head)->ipdata; 719 dtype = hammer2_get_dtype(ripdata->meta.type); 720 saveoff = bref.key & HAMMER2_DIRHASH_USERMSK; 721 r = vop_write_dirent(&error, uio, 722 ripdata->meta.inum & 723 HAMMER2_DIRHASH_USERMSK, 724 dtype, 725 ripdata->meta.name_len, 726 ripdata->filename); 727 hammer2_xop_pdata(&xop->head); 728 if (r) 729 break; 730 if (cookies) 731 cookies[cookie_index] = saveoff; 732 ++cookie_index; 733 } else if (bref.type == HAMMER2_BREF_TYPE_DIRENT) { 734 uint16_t namlen; 735 736 dtype = hammer2_get_dtype(bref.embed.dirent.type); 737 saveoff = bref.key & HAMMER2_DIRHASH_USERMSK; 738 namlen = bref.embed.dirent.namlen; 739 if (namlen <= sizeof(bref.check.buf)) { 740 dname = bref.check.buf; 741 } else { 742 dname = hammer2_xop_gdata(&xop->head)->buf; 743 } 744 r = vop_write_dirent(&error, uio, 745 bref.embed.dirent.inum, dtype, 746 namlen, dname); 747 if (namlen > sizeof(bref.check.buf)) 748 hammer2_xop_pdata(&xop->head); 749 if (r) 750 break; 751 if (cookies) 752 cookies[cookie_index] = saveoff; 753 ++cookie_index; 754 } else { 755 /* XXX chain error */ 756 kprintf("bad chain type readdir %d\n", bref.type); 757 } 758 } 759 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 760 if (error == ENOENT) { 761 error = 0; 762 eofflag = 1; 763 saveoff = (hammer2_key_t)-1; 764 } else { 765 saveoff = bref.key & HAMMER2_DIRHASH_USERMSK; 766 } 767 done: 768 hammer2_inode_unlock(ip); 769 if (ap->a_eofflag) 770 *ap->a_eofflag = eofflag; 771 if (hammer2_debug & 0x0020) 772 kprintf("readdir: done at %016jx\n", saveoff); 773 uio->uio_offset = saveoff & ~HAMMER2_DIRHASH_VISIBLE; 774 if (error && cookie_index == 0) { 775 if (cookies) { 776 kfree(cookies, M_TEMP); 777 *ap->a_ncookies = 0; 778 *ap->a_cookies = NULL; 779 } 780 } else { 781 if (cookies) { 782 *ap->a_ncookies = cookie_index; 783 *ap->a_cookies = cookies; 784 } 785 } 786 return (error); 787 #endif 788 return (EOPNOTSUPP); 789 } 790 791 /* 792 * hammer2_vop_readlink { vp, uio, cred } 793 */ 794 static 795 int 796 hammer2_vop_readlink(struct vop_readlink_args *ap) 797 { 798 struct m_vnode *vp; 799 hammer2_inode_t *ip; 800 int error; 801 802 vp = ap->a_vp; 803 if (vp->v_type != VLNK) 804 return (EINVAL); 805 ip = VTOI(vp); 806 807 error = hammer2_read_file(ip, ap->a_uio, 0); 808 return (error); 809 } 810 811 int 812 hammer2_readlink(struct m_vnode *vp, void *buf, size_t size) 813 { 814 assert(buf); 815 assert(size > 0); 816 assert(size <= HAMMER2_PBUFSIZE); 817 818 struct iovec iov = { 819 .iov_base = buf, 820 .iov_len = size, 821 }; 822 struct uio uio = { 823 .uio_iov = &iov, 824 .uio_iovcnt = 1, 825 .uio_offset = 0, 826 .uio_resid = size, 827 .uio_segflg = UIO_USERSPACE, 828 .uio_rw = UIO_READ, 829 .uio_td = NULL, 830 }; 831 struct vop_readlink_args ap = { 832 .a_vp = vp, 833 .a_uio = &uio, 834 .a_cred = NULL, 835 }; 836 837 return hammer2_vop_readlink(&ap); 838 } 839 840 static 841 int 842 hammer2_vop_read(struct vop_read_args *ap) 843 { 844 #if 0 845 struct m_vnode *vp; 846 hammer2_inode_t *ip; 847 struct uio *uio; 848 int error; 849 int seqcount; 850 851 /* 852 * Read operations supported on this vnode? 853 */ 854 vp = ap->a_vp; 855 if (vp->v_type == VDIR) 856 return (EISDIR); 857 if (vp->v_type != VREG) 858 return (EINVAL); 859 860 /* 861 * Misc 862 */ 863 ip = VTOI(vp); 864 uio = ap->a_uio; 865 error = 0; 866 867 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 868 869 error = hammer2_read_file(ip, uio, seqcount); 870 return (error); 871 #endif 872 return (EOPNOTSUPP); 873 } 874 875 static 876 int 877 hammer2_vop_write(struct vop_write_args *ap) 878 { 879 hammer2_inode_t *ip; 880 //thread_t td; 881 struct m_vnode *vp; 882 struct uio *uio; 883 int error; 884 int seqcount; 885 int ioflag; 886 887 /* 888 * Read operations supported on this vnode? 889 */ 890 vp = ap->a_vp; 891 if (vp->v_type != VREG) 892 return (EINVAL); 893 894 /* 895 * Misc 896 */ 897 ip = VTOI(vp); 898 ioflag = ap->a_ioflag; 899 uio = ap->a_uio; 900 error = 0; 901 if (ip->pmp->ronly || (ip->pmp->flags & HAMMER2_PMPF_EMERG)) 902 return (EROFS); 903 switch (hammer2_vfs_enospace(ip, uio->uio_resid, ap->a_cred)) { 904 case 2: 905 return (ENOSPC); 906 case 1: 907 ioflag |= IO_DIRECT; /* semi-synchronous */ 908 /* fall through */ 909 default: 910 break; 911 } 912 913 seqcount = ioflag >> IO_SEQSHIFT; 914 915 /* 916 * Check resource limit 917 */ 918 /* 919 if (uio->uio_resid > 0 && (td = uio->uio_td) != NULL && td->td_proc && 920 uio->uio_offset + uio->uio_resid > 921 td->td_proc->p_rlimit[RLIMIT_FSIZE].rlim_cur) { 922 lwpsignal(td->td_proc, td->td_lwp, SIGXFSZ); 923 return (EFBIG); 924 } 925 */ 926 927 /* 928 * The transaction interlocks against flush initiations 929 * (note: but will run concurrently with the actual flush). 930 * 931 * To avoid deadlocking against the VM system, we must flag any 932 * transaction related to the buffer cache or other direct 933 * VM page manipulation. 934 */ 935 if (uio->uio_segflg == UIO_NOCOPY) { 936 assert(0); /* no UIO_NOCOPY in makefs */ 937 hammer2_trans_init(ip->pmp, HAMMER2_TRANS_BUFCACHE); 938 } else { 939 hammer2_trans_init(ip->pmp, 0); 940 } 941 error = hammer2_write_file(ip, uio, ioflag, seqcount); 942 if (uio->uio_segflg == UIO_NOCOPY) { 943 assert(0); /* no UIO_NOCOPY in makefs */ 944 hammer2_trans_done(ip->pmp, HAMMER2_TRANS_BUFCACHE | 945 HAMMER2_TRANS_SIDEQ); 946 } else 947 hammer2_trans_done(ip->pmp, HAMMER2_TRANS_SIDEQ); 948 949 return (error); 950 } 951 952 int 953 hammer2_write(struct m_vnode *vp, void *buf, size_t size, off_t offset) 954 { 955 assert(buf); 956 assert(size > 0); 957 assert(size <= HAMMER2_PBUFSIZE); 958 959 struct iovec iov = { 960 .iov_base = buf, 961 .iov_len = size, 962 }; 963 struct uio uio = { 964 .uio_iov = &iov, 965 .uio_iovcnt = 1, 966 .uio_offset = offset, 967 .uio_resid = size, 968 .uio_segflg = UIO_USERSPACE, 969 .uio_rw = UIO_WRITE, 970 .uio_td = NULL, 971 }; 972 struct vop_write_args ap = { 973 .a_vp = vp, 974 .a_uio = &uio, 975 .a_ioflag = 0, 976 .a_cred = NULL, 977 }; 978 979 return hammer2_vop_write(&ap); 980 } 981 982 /* 983 * Perform read operations on a file or symlink given an UNLOCKED 984 * inode and uio. 985 * 986 * The passed ip is not locked. 987 */ 988 static 989 int 990 hammer2_read_file(hammer2_inode_t *ip, struct uio *uio, int seqcount) 991 { 992 hammer2_off_t size; 993 struct m_buf *bp; 994 int error; 995 996 error = 0; 997 998 /* 999 * UIO read loop. 1000 * 1001 * WARNING! Assumes that the kernel interlocks size changes at the 1002 * vnode level. 1003 */ 1004 hammer2_mtx_sh(&ip->lock); 1005 hammer2_mtx_sh(&ip->truncate_lock); 1006 size = ip->meta.size; 1007 hammer2_mtx_unlock(&ip->lock); 1008 1009 while (uio->uio_resid > 0 && uio->uio_offset < size) { 1010 hammer2_key_t lbase; 1011 hammer2_key_t leof; 1012 int lblksize; 1013 int loff; 1014 int n; 1015 1016 lblksize = hammer2_calc_logical(ip, uio->uio_offset, 1017 &lbase, &leof); 1018 #if 0 1019 #if 1 1020 bp = NULL; 1021 error = cluster_readx(ip->vp, leof, lbase, lblksize, 1022 B_NOTMETA | B_KVABIO, 1023 uio->uio_resid, 1024 seqcount * MAXBSIZE, 1025 &bp); 1026 #else 1027 if (uio->uio_segflg == UIO_NOCOPY) { 1028 bp = getblk(ip->vp, lbase, lblksize, 1029 GETBLK_BHEAVY | GETBLK_KVABIO, 0); 1030 if (bp->b_flags & B_CACHE) { 1031 int i; 1032 int j = 0; 1033 if (bp->b_xio.xio_npages != 16) 1034 kprintf("NPAGES BAD\n"); 1035 for (i = 0; i < bp->b_xio.xio_npages; ++i) { 1036 vm_page_t m; 1037 m = bp->b_xio.xio_pages[i]; 1038 if (m == NULL || m->valid == 0) { 1039 kprintf("bp %016jx %016jx pg %d inv", 1040 lbase, leof, i); 1041 if (m) 1042 kprintf("m->object %p/%p", m->object, ip->vp->v_object); 1043 kprintf("\n"); 1044 j = 1; 1045 } 1046 } 1047 if (j) 1048 kprintf("b_flags %08x, b_error %d\n", bp->b_flags, bp->b_error); 1049 } 1050 bqrelse(bp); 1051 } 1052 error = bread_kvabio(ip->vp, lbase, lblksize, &bp); 1053 #endif 1054 #else 1055 bp = getblkx(ip->vp, lbase, lblksize, 1056 GETBLK_BHEAVY | GETBLK_KVABIO, 0); 1057 bp->b_cmd = BUF_CMD_READ; 1058 1059 struct bio bio; 1060 bio.bio_buf = bp; 1061 bio.bio_offset = lbase; 1062 1063 struct vop_strategy_args ap; 1064 ap.a_vp = ip->vp; 1065 ap.a_bio = &bio; 1066 1067 error = hammer2_vop_strategy(&ap); 1068 assert(!error); 1069 #endif 1070 if (error) { 1071 brelse(bp); 1072 break; 1073 } 1074 bkvasync(bp); 1075 loff = (int)(uio->uio_offset - lbase); 1076 n = lblksize - loff; 1077 if (n > uio->uio_resid) 1078 n = uio->uio_resid; 1079 if (n > size - uio->uio_offset) 1080 n = (int)(size - uio->uio_offset); 1081 //bp->b_flags |= B_AGE; 1082 uiomovebp(bp, bp->b_data + loff, n, uio); 1083 bqrelse(bp); 1084 } 1085 hammer2_mtx_unlock(&ip->truncate_lock); 1086 1087 return (error); 1088 } 1089 1090 /* 1091 * Write to the file represented by the inode via the logical buffer cache. 1092 * The inode may represent a regular file or a symlink. 1093 * 1094 * The inode must not be locked. 1095 */ 1096 static 1097 int 1098 hammer2_write_file(hammer2_inode_t *ip, struct uio *uio, 1099 int ioflag, int seqcount) 1100 { 1101 hammer2_key_t old_eof; 1102 hammer2_key_t new_eof; 1103 struct m_buf *bp; 1104 int kflags; 1105 int error; 1106 int modified; 1107 1108 /* 1109 * Setup if append 1110 * 1111 * WARNING! Assumes that the kernel interlocks size changes at the 1112 * vnode level. 1113 */ 1114 hammer2_mtx_ex(&ip->lock); 1115 hammer2_mtx_sh(&ip->truncate_lock); 1116 if (ioflag & IO_APPEND) 1117 uio->uio_offset = ip->meta.size; 1118 old_eof = ip->meta.size; 1119 1120 /* 1121 * Extend the file if necessary. If the write fails at some point 1122 * we will truncate it back down to cover as much as we were able 1123 * to write. 1124 * 1125 * Doing this now makes it easier to calculate buffer sizes in 1126 * the loop. 1127 */ 1128 kflags = 0; 1129 error = 0; 1130 modified = 0; 1131 1132 if (uio->uio_offset + uio->uio_resid > old_eof) { 1133 new_eof = uio->uio_offset + uio->uio_resid; 1134 modified = 1; 1135 hammer2_extend_file(ip, new_eof); 1136 kflags |= NOTE_EXTEND; 1137 } else { 1138 new_eof = old_eof; 1139 } 1140 hammer2_mtx_unlock(&ip->lock); 1141 1142 /* 1143 * UIO write loop 1144 */ 1145 while (uio->uio_resid > 0) { 1146 hammer2_key_t lbase; 1147 int trivial; 1148 int endofblk; 1149 int lblksize; 1150 int loff; 1151 int n; 1152 1153 /* 1154 * Don't allow the buffer build to blow out the buffer 1155 * cache. 1156 */ 1157 if ((ioflag & IO_RECURSE) == 0) 1158 bwillwrite(HAMMER2_PBUFSIZE); 1159 1160 /* 1161 * This nominally tells us how much we can cluster and 1162 * what the logical buffer size needs to be. Currently 1163 * we don't try to cluster the write and just handle one 1164 * block at a time. 1165 */ 1166 lblksize = hammer2_calc_logical(ip, uio->uio_offset, 1167 &lbase, NULL); 1168 loff = (int)(uio->uio_offset - lbase); 1169 1170 KKASSERT(lblksize <= MAXBSIZE); 1171 1172 /* 1173 * Calculate bytes to copy this transfer and whether the 1174 * copy completely covers the buffer or not. 1175 */ 1176 trivial = 0; 1177 n = lblksize - loff; 1178 if (n > uio->uio_resid) { 1179 n = uio->uio_resid; 1180 if (loff == lbase && uio->uio_offset + n == new_eof) 1181 trivial = 1; 1182 endofblk = 0; 1183 } else { 1184 if (loff == 0) 1185 trivial = 1; 1186 endofblk = 1; 1187 } 1188 if (lbase >= new_eof) 1189 trivial = 1; 1190 trivial = 1; /* force trivial for makefs */ 1191 1192 /* 1193 * Get the buffer 1194 */ 1195 if (uio->uio_segflg == UIO_NOCOPY) { 1196 assert(0); /* no UIO_NOCOPY in makefs */ 1197 /* 1198 * Issuing a write with the same data backing the 1199 * buffer. Instantiate the buffer to collect the 1200 * backing vm pages, then read-in any missing bits. 1201 * 1202 * This case is used by vop_stdputpages(). 1203 */ 1204 bp = getblkx(ip->vp, lbase, lblksize, 1205 GETBLK_BHEAVY | GETBLK_KVABIO, 0); 1206 /* 1207 if ((bp->b_flags & B_CACHE) == 0) { 1208 bqrelse(bp); 1209 error = bread_kvabio(ip->vp, lbase, 1210 lblksize, &bp); 1211 } 1212 */ 1213 } else if (trivial) { 1214 /* 1215 * Even though we are entirely overwriting the buffer 1216 * we may still have to zero it out to avoid a 1217 * mmap/write visibility issue. 1218 */ 1219 bp = getblkx(ip->vp, lbase, lblksize, 1220 GETBLK_BHEAVY | GETBLK_KVABIO, 0); 1221 /* 1222 if ((bp->b_flags & B_CACHE) == 0) 1223 vfs_bio_clrbuf(bp); 1224 */ 1225 } else { 1226 assert(0); /* no partial write in makefs */ 1227 /* 1228 * Partial overwrite, read in any missing bits then 1229 * replace the portion being written. 1230 * 1231 * (The strategy code will detect zero-fill physical 1232 * blocks for this case). 1233 */ 1234 error = bread_kvabio(ip->vp, lbase, lblksize, &bp); 1235 if (error == 0) 1236 bheavy(bp); 1237 } 1238 1239 if (error) { 1240 brelse(bp); 1241 break; 1242 } 1243 1244 /* 1245 * Ok, copy the data in 1246 */ 1247 bkvasync(bp); 1248 error = uiomovebp(bp, bp->b_data + loff, n, uio); 1249 kflags |= NOTE_WRITE; 1250 modified = 1; 1251 if (error) { 1252 brelse(bp); 1253 break; 1254 } 1255 1256 /* 1257 * WARNING: Pageout daemon will issue UIO_NOCOPY writes 1258 * with IO_SYNC or IO_ASYNC set. These writes 1259 * must be handled as the pageout daemon expects. 1260 * 1261 * NOTE! H2 relies on cluster_write() here because it 1262 * cannot preallocate disk blocks at the logical 1263 * level due to not knowing what the compression 1264 * size will be at this time. 1265 * 1266 * We must use cluster_write() here and we depend 1267 * on the write-behind feature to flush buffers 1268 * appropriately. If we let the buffer daemons do 1269 * it the block allocations will be all over the 1270 * map. 1271 */ 1272 if (1) { 1273 bp->b_cmd = BUF_CMD_WRITE; 1274 1275 struct bio bio; 1276 bio.bio_buf = bp; 1277 bio.bio_offset = lbase; 1278 1279 struct vop_strategy_args ap; 1280 ap.a_vp = ip->vp; 1281 ap.a_bio = &bio; 1282 1283 error = hammer2_vop_strategy(&ap); 1284 assert(!error); 1285 1286 brelse(bp); 1287 } else if (ioflag & IO_SYNC) { 1288 assert(0); 1289 bwrite(bp); 1290 } else if ((ioflag & IO_DIRECT) && endofblk) { 1291 assert(0); 1292 bawrite(bp); 1293 } else if (ioflag & IO_ASYNC) { 1294 assert(0); 1295 bawrite(bp); 1296 } else if (0 /*ip->vp->v_mount->mnt_flag & MNT_NOCLUSTERW*/) { 1297 assert(0); 1298 bdwrite(bp); 1299 } else { 1300 assert(0); 1301 #if 0 1302 #if 1 1303 bp->b_flags |= B_CLUSTEROK; 1304 cluster_write(bp, new_eof, lblksize, seqcount); 1305 #else 1306 bp->b_flags |= B_CLUSTEROK; 1307 bdwrite(bp); 1308 #endif 1309 #endif 1310 } 1311 } 1312 1313 /* 1314 * Cleanup. If we extended the file EOF but failed to write through 1315 * the entire write is a failure and we have to back-up. 1316 */ 1317 if (error && new_eof != old_eof) { 1318 hammer2_mtx_unlock(&ip->truncate_lock); 1319 hammer2_mtx_ex(&ip->lock); /* note lock order */ 1320 hammer2_mtx_ex(&ip->truncate_lock); /* note lock order */ 1321 hammer2_truncate_file(ip, old_eof); 1322 if (ip->flags & HAMMER2_INODE_MODIFIED) 1323 hammer2_inode_chain_sync(ip); 1324 hammer2_mtx_unlock(&ip->lock); 1325 } else if (modified) { 1326 struct m_vnode *vp = ip->vp; 1327 1328 hammer2_mtx_ex(&ip->lock); 1329 hammer2_inode_modify(ip); 1330 if (uio->uio_segflg == UIO_NOCOPY) { 1331 assert(0); /* no UIO_NOCOPY in makefs */ 1332 /* 1333 if (vp->v_flag & VLASTWRITETS) { 1334 ip->meta.mtime = 1335 (unsigned long)vp->v_lastwrite_ts.tv_sec * 1336 1000000 + 1337 vp->v_lastwrite_ts.tv_nsec / 1000; 1338 } 1339 */ 1340 } else { 1341 hammer2_update_time(&ip->meta.mtime, true); 1342 vclrflags(vp, VLASTWRITETS); 1343 } 1344 1345 #if 0 1346 /* 1347 * REMOVED - handled by hammer2_extend_file(). Do not issue 1348 * a chain_sync() outside of a sync/fsync except for DIRECTDATA 1349 * state changes. 1350 * 1351 * Under normal conditions we only issue a chain_sync if 1352 * the inode's DIRECTDATA state changed. 1353 */ 1354 if (ip->flags & HAMMER2_INODE_RESIZED) 1355 hammer2_inode_chain_sync(ip); 1356 #endif 1357 hammer2_mtx_unlock(&ip->lock); 1358 hammer2_knote(ip->vp, kflags); 1359 } 1360 hammer2_trans_assert_strategy(ip->pmp); 1361 hammer2_mtx_unlock(&ip->truncate_lock); 1362 1363 return error; 1364 } 1365 1366 /* 1367 * Truncate the size of a file. The inode must be locked. 1368 * 1369 * We must unconditionally set HAMMER2_INODE_RESIZED to properly 1370 * ensure that any on-media data beyond the new file EOF has been destroyed. 1371 * 1372 * WARNING: nvtruncbuf() can only be safely called without the inode lock 1373 * held due to the way our write thread works. If the truncation 1374 * occurs in the middle of a buffer, nvtruncbuf() is responsible 1375 * for dirtying that buffer and zeroing out trailing bytes. 1376 * 1377 * WARNING! Assumes that the kernel interlocks size changes at the 1378 * vnode level. 1379 * 1380 * WARNING! Caller assumes responsibility for removing dead blocks 1381 * if INODE_RESIZED is set. 1382 */ 1383 static 1384 void 1385 hammer2_truncate_file(hammer2_inode_t *ip, hammer2_key_t nsize) 1386 { 1387 hammer2_key_t lbase; 1388 int nblksize; 1389 1390 hammer2_mtx_unlock(&ip->lock); 1391 if (ip->vp) { 1392 nblksize = hammer2_calc_logical(ip, nsize, &lbase, NULL); 1393 nvtruncbuf(ip->vp, nsize, 1394 nblksize, (int)nsize & (nblksize - 1), 1395 0); 1396 } 1397 hammer2_mtx_ex(&ip->lock); 1398 KKASSERT((ip->flags & HAMMER2_INODE_RESIZED) == 0); 1399 ip->osize = ip->meta.size; 1400 ip->meta.size = nsize; 1401 atomic_set_int(&ip->flags, HAMMER2_INODE_RESIZED); 1402 hammer2_inode_modify(ip); 1403 } 1404 1405 /* 1406 * Extend the size of a file. The inode must be locked. 1407 * 1408 * Even though the file size is changing, we do not have to set the 1409 * INODE_RESIZED bit unless the file size crosses the EMBEDDED_BYTES 1410 * boundary. When this occurs a hammer2_inode_chain_sync() is required 1411 * to prepare the inode cluster's indirect block table, otherwise 1412 * async execution of the strategy code will implode on us. 1413 * 1414 * WARNING! Assumes that the kernel interlocks size changes at the 1415 * vnode level. 1416 * 1417 * WARNING! Caller assumes responsibility for transitioning out 1418 * of the inode DIRECTDATA mode if INODE_RESIZED is set. 1419 */ 1420 static 1421 void 1422 hammer2_extend_file(hammer2_inode_t *ip, hammer2_key_t nsize) 1423 { 1424 hammer2_key_t lbase; 1425 hammer2_key_t osize; 1426 int oblksize; 1427 int nblksize; 1428 int error; 1429 1430 KKASSERT((ip->flags & HAMMER2_INODE_RESIZED) == 0); 1431 hammer2_inode_modify(ip); 1432 osize = ip->meta.size; 1433 ip->osize = osize; 1434 ip->meta.size = nsize; 1435 1436 /* 1437 * We must issue a chain_sync() when the DIRECTDATA state changes 1438 * to prevent confusion between the flush code and the in-memory 1439 * state. This is not perfect because we are doing it outside of 1440 * a sync/fsync operation, so it might not be fully synchronized 1441 * with the meta-data topology flush. 1442 * 1443 * We must retain and re-dirty the buffer cache buffer containing 1444 * the direct data so it can be written to a real block. It should 1445 * not be possible for a bread error to occur since the original data 1446 * is extracted from the inode structure directly. 1447 */ 1448 if (osize <= HAMMER2_EMBEDDED_BYTES && nsize > HAMMER2_EMBEDDED_BYTES) { 1449 if (osize) { 1450 assert(0); /* no such transition in makefs */ 1451 struct m_buf *bp; 1452 1453 oblksize = hammer2_calc_logical(ip, 0, NULL, NULL); 1454 error = bread_kvabio(ip->vp, 0, oblksize, &bp); 1455 atomic_set_int(&ip->flags, HAMMER2_INODE_RESIZED); 1456 hammer2_inode_chain_sync(ip); 1457 if (error == 0) { 1458 bheavy(bp); 1459 bdwrite(bp); 1460 } else { 1461 brelse(bp); 1462 } 1463 } else { 1464 atomic_set_int(&ip->flags, HAMMER2_INODE_RESIZED); 1465 hammer2_inode_chain_sync(ip); 1466 } 1467 } 1468 hammer2_mtx_unlock(&ip->lock); 1469 if (ip->vp) { 1470 oblksize = hammer2_calc_logical(ip, osize, &lbase, NULL); 1471 nblksize = hammer2_calc_logical(ip, nsize, &lbase, NULL); 1472 nvextendbuf(ip->vp, 1473 osize, nsize, 1474 oblksize, nblksize, 1475 -1, -1, 0); 1476 } 1477 hammer2_mtx_ex(&ip->lock); 1478 } 1479 1480 static 1481 int 1482 hammer2_vop_nresolve(struct vop_nresolve_args *ap) 1483 { 1484 hammer2_xop_nresolve_t *xop; 1485 hammer2_inode_t *ip; 1486 hammer2_inode_t *dip; 1487 struct namecache *ncp; 1488 struct m_vnode *vp; 1489 int error; 1490 1491 dip = VTOI(ap->a_dvp); 1492 xop = hammer2_xop_alloc(dip, 0); 1493 1494 ncp = ap->a_nch->ncp; 1495 hammer2_xop_setname(&xop->head, ncp->nc_name, ncp->nc_nlen); 1496 1497 /* 1498 * Note: In DragonFly the kernel handles '.' and '..'. 1499 */ 1500 hammer2_inode_lock(dip, HAMMER2_RESOLVE_SHARED); 1501 hammer2_xop_start(&xop->head, &hammer2_nresolve_desc); 1502 1503 error = hammer2_xop_collect(&xop->head, 0); 1504 error = hammer2_error_to_errno(error); 1505 if (error) { 1506 ip = NULL; 1507 } else { 1508 ip = hammer2_inode_get(dip->pmp, &xop->head, -1, -1); 1509 } 1510 hammer2_inode_unlock(dip); 1511 1512 /* 1513 * Acquire the related vnode 1514 * 1515 * NOTE: For error processing, only ENOENT resolves the namecache 1516 * entry to NULL, otherwise we just return the error and 1517 * leave the namecache unresolved. 1518 * 1519 * WARNING: inode structure is locked exclusively via inode_get 1520 * but chain was locked shared. inode_unlock() 1521 * will handle it properly. 1522 */ 1523 if (ip) { 1524 vp = hammer2_igetv(ip, &error); /* error set to UNIX error */ 1525 if (error == 0) { 1526 vn_unlock(vp); 1527 cache_setvp(ap->a_nch, vp); 1528 *ap->a_vpp = vp; 1529 } else if (error == ENOENT) { 1530 cache_setvp(ap->a_nch, NULL); 1531 } 1532 hammer2_inode_unlock(ip); 1533 1534 /* 1535 * The vp should not be released until after we've disposed 1536 * of our locks, because it might cause vop_inactive() to 1537 * be called. 1538 */ 1539 if (vp) 1540 vrele(vp); 1541 } else { 1542 error = ENOENT; 1543 cache_setvp(ap->a_nch, NULL); 1544 } 1545 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 1546 /* 1547 KASSERT(error || ap->a_nch->ncp->nc_vp != NULL, 1548 ("resolve error %d/%p ap %p\n", 1549 error, ap->a_nch->ncp->nc_vp, ap)); 1550 */ 1551 1552 return error; 1553 } 1554 1555 int 1556 hammer2_nresolve(struct m_vnode *dvp, struct m_vnode **vpp, char *name, int nlen) 1557 { 1558 *vpp = NULL; 1559 struct namecache nc = { 1560 .nc_name = name, 1561 .nc_nlen = nlen, 1562 }; 1563 struct nchandle nch = { 1564 .ncp = &nc, 1565 }; 1566 struct vop_nresolve_args ap = { 1567 .a_nch = &nch, 1568 .a_dvp = dvp, 1569 .a_vpp = vpp, 1570 }; 1571 1572 return hammer2_vop_nresolve(&ap); 1573 } 1574 1575 static 1576 int 1577 hammer2_vop_nlookupdotdot(struct vop_nlookupdotdot_args *ap) 1578 { 1579 #if 0 1580 hammer2_inode_t *dip; 1581 hammer2_tid_t inum; 1582 int error; 1583 1584 dip = VTOI(ap->a_dvp); 1585 inum = dip->meta.iparent; 1586 *ap->a_vpp = NULL; 1587 1588 if (inum) { 1589 error = hammer2_vfs_vget(ap->a_dvp->v_mount, NULL, 1590 inum, ap->a_vpp); 1591 } else { 1592 error = ENOENT; 1593 } 1594 return error; 1595 #endif 1596 return (EOPNOTSUPP); 1597 } 1598 1599 static 1600 int 1601 hammer2_vop_nmkdir(struct vop_nmkdir_args *ap) 1602 { 1603 hammer2_inode_t *dip; 1604 hammer2_inode_t *nip; 1605 struct namecache *ncp; 1606 const char *name; 1607 size_t name_len; 1608 hammer2_tid_t inum; 1609 int error; 1610 1611 dip = VTOI(ap->a_dvp); 1612 if (dip->pmp->ronly || (dip->pmp->flags & HAMMER2_PMPF_EMERG)) 1613 return (EROFS); 1614 if (hammer2_vfs_enospace(dip, 0, ap->a_cred) > 1) 1615 return (ENOSPC); 1616 1617 ncp = ap->a_nch->ncp; 1618 name = ncp->nc_name; 1619 name_len = ncp->nc_nlen; 1620 1621 hammer2_trans_init(dip->pmp, 0); 1622 1623 inum = hammer2_trans_newinum(dip->pmp); 1624 1625 /* 1626 * Create the actual inode as a hidden file in the iroot, then 1627 * create the directory entry. The creation of the actual inode 1628 * sets its nlinks to 1 which is the value we desire. 1629 * 1630 * dip must be locked before nip to avoid deadlock. 1631 */ 1632 hammer2_inode_lock(dip, 0); 1633 nip = hammer2_inode_create_normal(dip, ap->a_vap, ap->a_cred, 1634 inum, &error); 1635 if (error) { 1636 error = hammer2_error_to_errno(error); 1637 } else { 1638 error = hammer2_dirent_create(dip, name, name_len, 1639 nip->meta.inum, nip->meta.type); 1640 /* returns UNIX error code */ 1641 } 1642 if (error) { 1643 if (nip) { 1644 hammer2_inode_unlink_finisher(nip, NULL); 1645 hammer2_inode_unlock(nip); 1646 nip = NULL; 1647 } 1648 *ap->a_vpp = NULL; 1649 } else { 1650 /* 1651 * inode_depend() must occur before the igetv() because 1652 * the igetv() can temporarily release the inode lock. 1653 */ 1654 hammer2_inode_depend(dip, nip); /* before igetv */ 1655 *ap->a_vpp = hammer2_igetv(nip, &error); 1656 hammer2_inode_unlock(nip); 1657 } 1658 1659 /* 1660 * Update dip's mtime 1661 * 1662 * We can use a shared inode lock and allow the meta.mtime update 1663 * SMP race. hammer2_inode_modify() is MPSAFE w/a shared lock. 1664 */ 1665 if (error == 0) { 1666 uint64_t mtime; 1667 1668 /*hammer2_inode_lock(dip, HAMMER2_RESOLVE_SHARED);*/ 1669 hammer2_update_time(&mtime, true); 1670 hammer2_inode_modify(dip); 1671 dip->meta.mtime = mtime; 1672 /*hammer2_inode_unlock(dip);*/ 1673 } 1674 hammer2_inode_unlock(dip); 1675 1676 hammer2_trans_done(dip->pmp, HAMMER2_TRANS_SIDEQ); 1677 1678 if (error == 0) { 1679 cache_setunresolved(ap->a_nch); 1680 cache_setvp(ap->a_nch, *ap->a_vpp); 1681 hammer2_knote(ap->a_dvp, NOTE_WRITE | NOTE_LINK); 1682 } 1683 return error; 1684 } 1685 1686 int 1687 hammer2_nmkdir(struct m_vnode *dvp, struct m_vnode **vpp, char *name, int nlen, 1688 mode_t mode) 1689 { 1690 struct namecache nc = { 1691 .nc_name = name, 1692 .nc_nlen = nlen, 1693 }; 1694 struct nchandle nch = { 1695 .ncp = &nc, 1696 }; 1697 uid_t va_uid = VNOVAL; //getuid(); 1698 uid_t va_gid = VNOVAL; //getgid(); 1699 struct vattr va = { 1700 .va_type = VDIR, 1701 .va_mode = mode & ~S_IFMT, 1702 .va_uid = va_uid, 1703 .va_gid = va_gid, 1704 }; 1705 struct vop_nmkdir_args ap = { 1706 .a_nch = &nch, 1707 .a_dvp = dvp, 1708 .a_vpp = vpp, 1709 .a_vap = &va, 1710 }; 1711 1712 return hammer2_vop_nmkdir(&ap); 1713 } 1714 1715 static 1716 int 1717 hammer2_vop_open(struct vop_open_args *ap) 1718 { 1719 #if 0 1720 return vop_stdopen(ap); 1721 #endif 1722 return (EOPNOTSUPP); 1723 } 1724 1725 /* 1726 * hammer2_vop_advlock { vp, id, op, fl, flags } 1727 */ 1728 static 1729 int 1730 hammer2_vop_advlock(struct vop_advlock_args *ap) 1731 { 1732 #if 0 1733 hammer2_inode_t *ip = VTOI(ap->a_vp); 1734 hammer2_off_t size; 1735 1736 size = ip->meta.size; 1737 return (lf_advlock(ap, &ip->advlock, size)); 1738 #endif 1739 return (EOPNOTSUPP); 1740 } 1741 1742 static 1743 int 1744 hammer2_vop_close(struct vop_close_args *ap) 1745 { 1746 #if 0 1747 return vop_stdclose(ap); 1748 #endif 1749 return (EOPNOTSUPP); 1750 } 1751 1752 /* 1753 * hammer2_vop_nlink { nch, dvp, vp, cred } 1754 * 1755 * Create a hardlink from (vp) to {dvp, nch}. 1756 */ 1757 static 1758 int 1759 hammer2_vop_nlink(struct vop_nlink_args *ap) 1760 { 1761 hammer2_inode_t *tdip; /* target directory to create link in */ 1762 hammer2_inode_t *ip; /* inode we are hardlinking to */ 1763 struct namecache *ncp; 1764 const char *name; 1765 size_t name_len; 1766 int error; 1767 uint64_t cmtime; 1768 1769 /* We know it's the same in makefs */ 1770 /* 1771 if (ap->a_dvp->v_mount != ap->a_vp->v_mount) 1772 return(EXDEV); 1773 */ 1774 1775 tdip = VTOI(ap->a_dvp); 1776 if (tdip->pmp->ronly || (tdip->pmp->flags & HAMMER2_PMPF_EMERG)) 1777 return (EROFS); 1778 if (hammer2_vfs_enospace(tdip, 0, ap->a_cred) > 1) 1779 return (ENOSPC); 1780 1781 ncp = ap->a_nch->ncp; 1782 name = ncp->nc_name; 1783 name_len = ncp->nc_nlen; 1784 1785 /* 1786 * ip represents the file being hardlinked. The file could be a 1787 * normal file or a hardlink target if it has already been hardlinked. 1788 * (with the new semantics, it will almost always be a hardlink 1789 * target). 1790 * 1791 * Bump nlinks and potentially also create or move the hardlink 1792 * target in the parent directory common to (ip) and (tdip). The 1793 * consolidation code can modify ip->cluster. The returned cluster 1794 * is locked. 1795 */ 1796 ip = VTOI(ap->a_vp); 1797 KASSERT(ip->pmp, ("ip->pmp is NULL %p %p", ip, ip->pmp)); 1798 hammer2_trans_init(ip->pmp, 0); 1799 1800 /* 1801 * Target should be an indexed inode or there's no way we will ever 1802 * be able to find it! 1803 */ 1804 KKASSERT((ip->meta.name_key & HAMMER2_DIRHASH_VISIBLE) == 0); 1805 1806 error = 0; 1807 1808 /* 1809 * Can return NULL and error == EXDEV if the common parent 1810 * crosses a directory with the xlink flag set. 1811 */ 1812 hammer2_inode_lock4(tdip, ip, NULL, NULL); 1813 1814 hammer2_update_time(&cmtime, true); 1815 1816 /* 1817 * Create the directory entry and bump nlinks. 1818 * Also update ip's ctime. 1819 */ 1820 if (error == 0) { 1821 error = hammer2_dirent_create(tdip, name, name_len, 1822 ip->meta.inum, ip->meta.type); 1823 hammer2_inode_modify(ip); 1824 ++ip->meta.nlinks; 1825 ip->meta.ctime = cmtime; 1826 } 1827 if (error == 0) { 1828 /* 1829 * Update dip's [cm]time 1830 */ 1831 hammer2_inode_modify(tdip); 1832 tdip->meta.mtime = cmtime; 1833 tdip->meta.ctime = cmtime; 1834 1835 cache_setunresolved(ap->a_nch); 1836 cache_setvp(ap->a_nch, ap->a_vp); 1837 } 1838 hammer2_inode_unlock(ip); 1839 hammer2_inode_unlock(tdip); 1840 1841 hammer2_trans_done(ip->pmp, HAMMER2_TRANS_SIDEQ); 1842 hammer2_knote(ap->a_vp, NOTE_LINK); 1843 hammer2_knote(ap->a_dvp, NOTE_WRITE); 1844 1845 return error; 1846 } 1847 1848 int 1849 hammer2_nlink(struct m_vnode *dvp, struct m_vnode *vp, char *name, int nlen) 1850 { 1851 struct namecache nc = { 1852 .nc_name = name, 1853 .nc_nlen = nlen, 1854 }; 1855 struct nchandle nch = { 1856 .ncp = &nc, 1857 }; 1858 struct vop_nlink_args ap = { 1859 .a_nch = &nch, 1860 .a_dvp = dvp, 1861 .a_vp = vp, 1862 }; 1863 1864 return hammer2_vop_nlink(&ap); 1865 } 1866 1867 /* 1868 * hammer2_vop_ncreate { nch, dvp, vpp, cred, vap } 1869 * 1870 * The operating system has already ensured that the directory entry 1871 * does not exist and done all appropriate namespace locking. 1872 */ 1873 static 1874 int 1875 hammer2_vop_ncreate(struct vop_ncreate_args *ap) 1876 { 1877 hammer2_inode_t *dip; 1878 hammer2_inode_t *nip; 1879 struct namecache *ncp; 1880 const char *name; 1881 size_t name_len; 1882 hammer2_tid_t inum; 1883 int error; 1884 1885 dip = VTOI(ap->a_dvp); 1886 if (dip->pmp->ronly || (dip->pmp->flags & HAMMER2_PMPF_EMERG)) 1887 return (EROFS); 1888 if (hammer2_vfs_enospace(dip, 0, ap->a_cred) > 1) 1889 return (ENOSPC); 1890 1891 ncp = ap->a_nch->ncp; 1892 name = ncp->nc_name; 1893 name_len = ncp->nc_nlen; 1894 hammer2_trans_init(dip->pmp, 0); 1895 1896 inum = hammer2_trans_newinum(dip->pmp); 1897 1898 /* 1899 * Create the actual inode as a hidden file in the iroot, then 1900 * create the directory entry. The creation of the actual inode 1901 * sets its nlinks to 1 which is the value we desire. 1902 * 1903 * dip must be locked before nip to avoid deadlock. 1904 */ 1905 hammer2_inode_lock(dip, 0); 1906 nip = hammer2_inode_create_normal(dip, ap->a_vap, ap->a_cred, 1907 inum, &error); 1908 1909 if (error) { 1910 error = hammer2_error_to_errno(error); 1911 } else { 1912 error = hammer2_dirent_create(dip, name, name_len, 1913 nip->meta.inum, nip->meta.type); 1914 } 1915 if (error) { 1916 if (nip) { 1917 hammer2_inode_unlink_finisher(nip, NULL); 1918 hammer2_inode_unlock(nip); 1919 nip = NULL; 1920 } 1921 *ap->a_vpp = NULL; 1922 } else { 1923 hammer2_inode_depend(dip, nip); /* before igetv */ 1924 *ap->a_vpp = hammer2_igetv(nip, &error); 1925 hammer2_inode_unlock(nip); 1926 } 1927 1928 /* 1929 * Update dip's mtime 1930 */ 1931 if (error == 0) { 1932 uint64_t mtime; 1933 1934 /*hammer2_inode_lock(dip, HAMMER2_RESOLVE_SHARED);*/ 1935 hammer2_update_time(&mtime, true); 1936 hammer2_inode_modify(dip); 1937 dip->meta.mtime = mtime; 1938 /*hammer2_inode_unlock(dip);*/ 1939 } 1940 hammer2_inode_unlock(dip); 1941 1942 hammer2_trans_done(dip->pmp, HAMMER2_TRANS_SIDEQ); 1943 1944 if (error == 0) { 1945 cache_setunresolved(ap->a_nch); 1946 cache_setvp(ap->a_nch, *ap->a_vpp); 1947 hammer2_knote(ap->a_dvp, NOTE_WRITE); 1948 } 1949 return error; 1950 } 1951 1952 int 1953 hammer2_ncreate(struct m_vnode *dvp, struct m_vnode **vpp, char *name, int nlen, 1954 mode_t mode) 1955 { 1956 struct namecache nc = { 1957 .nc_name = name, 1958 .nc_nlen = nlen, 1959 }; 1960 struct nchandle nch = { 1961 .ncp = &nc, 1962 }; 1963 uid_t va_uid = VNOVAL; //getuid(); 1964 uid_t va_gid = VNOVAL; //getgid(); 1965 struct vattr va = { 1966 .va_type = VREG, 1967 .va_mode = mode & ~S_IFMT, 1968 .va_uid = va_uid, 1969 .va_gid = va_gid, 1970 }; 1971 struct vop_ncreate_args ap = { 1972 .a_nch = &nch, 1973 .a_dvp = dvp, 1974 .a_vpp = vpp, 1975 .a_vap = &va, 1976 }; 1977 1978 return hammer2_vop_ncreate(&ap); 1979 } 1980 1981 /* 1982 * Make a device node (typically a fifo) 1983 */ 1984 static 1985 int 1986 hammer2_vop_nmknod(struct vop_nmknod_args *ap) 1987 { 1988 hammer2_inode_t *dip; 1989 hammer2_inode_t *nip; 1990 struct namecache *ncp; 1991 const char *name; 1992 size_t name_len; 1993 hammer2_tid_t inum; 1994 int error; 1995 1996 dip = VTOI(ap->a_dvp); 1997 if (dip->pmp->ronly || (dip->pmp->flags & HAMMER2_PMPF_EMERG)) 1998 return (EROFS); 1999 if (hammer2_vfs_enospace(dip, 0, ap->a_cred) > 1) 2000 return (ENOSPC); 2001 2002 ncp = ap->a_nch->ncp; 2003 name = ncp->nc_name; 2004 name_len = ncp->nc_nlen; 2005 hammer2_trans_init(dip->pmp, 0); 2006 2007 /* 2008 * Create the device inode and then create the directory entry. 2009 * 2010 * dip must be locked before nip to avoid deadlock. 2011 */ 2012 inum = hammer2_trans_newinum(dip->pmp); 2013 2014 hammer2_inode_lock(dip, 0); 2015 nip = hammer2_inode_create_normal(dip, ap->a_vap, ap->a_cred, 2016 inum, &error); 2017 if (error == 0) { 2018 error = hammer2_dirent_create(dip, name, name_len, 2019 nip->meta.inum, nip->meta.type); 2020 } 2021 if (error) { 2022 if (nip) { 2023 hammer2_inode_unlink_finisher(nip, NULL); 2024 hammer2_inode_unlock(nip); 2025 nip = NULL; 2026 } 2027 *ap->a_vpp = NULL; 2028 } else { 2029 hammer2_inode_depend(dip, nip); /* before igetv */ 2030 *ap->a_vpp = hammer2_igetv(nip, &error); 2031 hammer2_inode_unlock(nip); 2032 } 2033 2034 /* 2035 * Update dip's mtime 2036 */ 2037 if (error == 0) { 2038 uint64_t mtime; 2039 2040 /*hammer2_inode_lock(dip, HAMMER2_RESOLVE_SHARED);*/ 2041 hammer2_update_time(&mtime, true); 2042 hammer2_inode_modify(dip); 2043 dip->meta.mtime = mtime; 2044 /*hammer2_inode_unlock(dip);*/ 2045 } 2046 hammer2_inode_unlock(dip); 2047 2048 hammer2_trans_done(dip->pmp, HAMMER2_TRANS_SIDEQ); 2049 2050 if (error == 0) { 2051 cache_setunresolved(ap->a_nch); 2052 cache_setvp(ap->a_nch, *ap->a_vpp); 2053 hammer2_knote(ap->a_dvp, NOTE_WRITE); 2054 } 2055 return error; 2056 } 2057 2058 int 2059 hammer2_nmknod(struct m_vnode *dvp, struct m_vnode **vpp, char *name, int nlen, 2060 int type, mode_t mode) 2061 { 2062 struct namecache nc = { 2063 .nc_name = name, 2064 .nc_nlen = nlen, 2065 }; 2066 struct nchandle nch = { 2067 .ncp = &nc, 2068 }; 2069 uid_t va_uid = VNOVAL; //getuid(); 2070 uid_t va_gid = VNOVAL; //getgid(); 2071 struct vattr va = { 2072 .va_type = type, 2073 .va_mode = mode & ~S_IFMT, 2074 .va_uid = va_uid, 2075 .va_gid = va_gid, 2076 }; 2077 struct vop_nmknod_args ap = { 2078 .a_nch = &nch, 2079 .a_dvp = dvp, 2080 .a_vpp = vpp, 2081 .a_vap = &va, 2082 }; 2083 2084 return hammer2_vop_nmknod(&ap); 2085 } 2086 2087 /* 2088 * hammer2_vop_nsymlink { nch, dvp, vpp, cred, vap, target } 2089 */ 2090 static 2091 int 2092 hammer2_vop_nsymlink(struct vop_nsymlink_args *ap) 2093 { 2094 hammer2_inode_t *dip; 2095 hammer2_inode_t *nip; 2096 struct namecache *ncp; 2097 const char *name; 2098 size_t name_len; 2099 hammer2_tid_t inum; 2100 int error; 2101 2102 dip = VTOI(ap->a_dvp); 2103 if (dip->pmp->ronly || (dip->pmp->flags & HAMMER2_PMPF_EMERG)) 2104 return (EROFS); 2105 if (hammer2_vfs_enospace(dip, 0, ap->a_cred) > 1) 2106 return (ENOSPC); 2107 2108 ncp = ap->a_nch->ncp; 2109 name = ncp->nc_name; 2110 name_len = ncp->nc_nlen; 2111 hammer2_trans_init(dip->pmp, 0); 2112 2113 ap->a_vap->va_type = VLNK; /* enforce type */ 2114 2115 /* 2116 * Create the softlink as an inode and then create the directory 2117 * entry. 2118 * 2119 * dip must be locked before nip to avoid deadlock. 2120 */ 2121 inum = hammer2_trans_newinum(dip->pmp); 2122 2123 hammer2_inode_lock(dip, 0); 2124 nip = hammer2_inode_create_normal(dip, ap->a_vap, ap->a_cred, 2125 inum, &error); 2126 if (error == 0) { 2127 error = hammer2_dirent_create(dip, name, name_len, 2128 nip->meta.inum, nip->meta.type); 2129 } 2130 if (error) { 2131 if (nip) { 2132 hammer2_inode_unlink_finisher(nip, NULL); 2133 hammer2_inode_unlock(nip); 2134 nip = NULL; 2135 } 2136 *ap->a_vpp = NULL; 2137 hammer2_inode_unlock(dip); 2138 hammer2_trans_done(dip->pmp, HAMMER2_TRANS_SIDEQ); 2139 return error; 2140 } 2141 hammer2_inode_depend(dip, nip); /* before igetv */ 2142 *ap->a_vpp = hammer2_igetv(nip, &error); 2143 2144 /* 2145 * Build the softlink (~like file data) and finalize the namecache. 2146 */ 2147 if (error == 0) { 2148 size_t bytes; 2149 struct uio auio; 2150 struct iovec aiov; 2151 2152 bytes = strlen(ap->a_target); 2153 2154 hammer2_inode_unlock(nip); 2155 bzero(&auio, sizeof(auio)); 2156 bzero(&aiov, sizeof(aiov)); 2157 auio.uio_iov = &aiov; 2158 auio.uio_segflg = UIO_SYSSPACE; 2159 auio.uio_rw = UIO_WRITE; 2160 auio.uio_resid = bytes; 2161 auio.uio_iovcnt = 1; 2162 auio.uio_td = curthread; 2163 aiov.iov_base = ap->a_target; 2164 aiov.iov_len = bytes; 2165 error = hammer2_write_file(nip, &auio, IO_APPEND, 0); 2166 /* XXX handle error */ 2167 error = 0; 2168 } else { 2169 hammer2_inode_unlock(nip); 2170 } 2171 2172 /* 2173 * Update dip's mtime 2174 */ 2175 if (error == 0) { 2176 uint64_t mtime; 2177 2178 /*hammer2_inode_lock(dip, HAMMER2_RESOLVE_SHARED);*/ 2179 hammer2_update_time(&mtime, true); 2180 hammer2_inode_modify(dip); 2181 dip->meta.mtime = mtime; 2182 /*hammer2_inode_unlock(dip);*/ 2183 } 2184 hammer2_inode_unlock(dip); 2185 2186 hammer2_trans_done(dip->pmp, HAMMER2_TRANS_SIDEQ); 2187 2188 /* 2189 * Finalize namecache 2190 */ 2191 if (error == 0) { 2192 cache_setunresolved(ap->a_nch); 2193 cache_setvp(ap->a_nch, *ap->a_vpp); 2194 hammer2_knote(ap->a_dvp, NOTE_WRITE); 2195 } 2196 return error; 2197 } 2198 2199 int 2200 hammer2_nsymlink(struct m_vnode *dvp, struct m_vnode **vpp, char *name, int nlen, 2201 char *target, mode_t mode) 2202 { 2203 struct namecache nc = { 2204 .nc_name = name, 2205 .nc_nlen = nlen, 2206 }; 2207 struct nchandle nch = { 2208 .ncp = &nc, 2209 }; 2210 uid_t va_uid = VNOVAL; //getuid(); 2211 uid_t va_gid = VNOVAL; //getgid(); 2212 struct vattr va = { 2213 .va_type = VDIR, 2214 .va_mode = mode & ~S_IFMT, 2215 .va_uid = va_uid, 2216 .va_gid = va_gid, 2217 }; 2218 struct vop_nsymlink_args ap = { 2219 .a_nch = &nch, 2220 .a_dvp = dvp, 2221 .a_vpp = vpp, 2222 .a_vap = &va, 2223 .a_target = target, 2224 }; 2225 2226 return hammer2_vop_nsymlink(&ap); 2227 } 2228 2229 /* 2230 * hammer2_vop_nremove { nch, dvp, cred } 2231 */ 2232 static 2233 int 2234 hammer2_vop_nremove(struct vop_nremove_args *ap) 2235 { 2236 #if 0 2237 hammer2_xop_unlink_t *xop; 2238 hammer2_inode_t *dip; 2239 hammer2_inode_t *ip; 2240 struct m_vnode *vprecycle; 2241 struct namecache *ncp; 2242 int error; 2243 2244 dip = VTOI(ap->a_dvp); 2245 if (dip->pmp->ronly) 2246 return (EROFS); 2247 #if 0 2248 /* allow removals, except user to also bulkfree */ 2249 if (hammer2_vfs_enospace(dip, 0, ap->a_cred) > 1) 2250 return (ENOSPC); 2251 #endif 2252 2253 ncp = ap->a_nch->ncp; 2254 2255 if (hammer2_debug_inode && dip->meta.inum == hammer2_debug_inode) { 2256 kprintf("hammer2: attempt to delete inside debug inode: %s\n", 2257 ncp->nc_name); 2258 while (hammer2_debug_inode && 2259 dip->meta.inum == hammer2_debug_inode) { 2260 tsleep(&hammer2_debug_inode, 0, "h2debug", hz*5); 2261 } 2262 } 2263 2264 hammer2_trans_init(dip->pmp, 0); 2265 hammer2_inode_lock(dip, 0); 2266 2267 /* 2268 * The unlink XOP unlinks the path from the directory and 2269 * locates and returns the cluster associated with the real inode. 2270 * We have to handle nlinks here on the frontend. 2271 */ 2272 xop = hammer2_xop_alloc(dip, HAMMER2_XOP_MODIFYING); 2273 hammer2_xop_setname(&xop->head, ncp->nc_name, ncp->nc_nlen); 2274 2275 xop->isdir = 0; 2276 xop->dopermanent = 0; 2277 hammer2_xop_start(&xop->head, &hammer2_unlink_desc); 2278 2279 /* 2280 * Collect the real inode and adjust nlinks, destroy the real 2281 * inode if nlinks transitions to 0 and it was the real inode 2282 * (else it has already been removed). 2283 */ 2284 error = hammer2_xop_collect(&xop->head, 0); 2285 error = hammer2_error_to_errno(error); 2286 vprecycle = NULL; 2287 2288 if (error == 0) { 2289 ip = hammer2_inode_get(dip->pmp, &xop->head, -1, -1); 2290 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 2291 if (ip) { 2292 if (hammer2_debug_inode && 2293 ip->meta.inum == hammer2_debug_inode) { 2294 kprintf("hammer2: attempt to delete debug " 2295 "inode!\n"); 2296 while (hammer2_debug_inode && 2297 ip->meta.inum == hammer2_debug_inode) { 2298 tsleep(&hammer2_debug_inode, 0, 2299 "h2debug", hz*5); 2300 } 2301 } 2302 hammer2_inode_unlink_finisher(ip, &vprecycle); 2303 hammer2_inode_depend(dip, ip); /* after modified */ 2304 hammer2_inode_unlock(ip); 2305 } 2306 } else { 2307 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 2308 } 2309 2310 /* 2311 * Update dip's mtime 2312 */ 2313 if (error == 0) { 2314 uint64_t mtime; 2315 2316 /*hammer2_inode_lock(dip, HAMMER2_RESOLVE_SHARED);*/ 2317 hammer2_update_time(&mtime); 2318 hammer2_inode_modify(dip); 2319 dip->meta.mtime = mtime; 2320 /*hammer2_inode_unlock(dip);*/ 2321 } 2322 hammer2_inode_unlock(dip); 2323 2324 hammer2_trans_done(dip->pmp, HAMMER2_TRANS_SIDEQ); 2325 if (error == 0) { 2326 cache_unlink(ap->a_nch); 2327 hammer2_knote(ap->a_dvp, NOTE_WRITE); 2328 } 2329 if (vprecycle) 2330 hammer2_inode_vprecycle(vprecycle); 2331 2332 return (error); 2333 #endif 2334 return (EOPNOTSUPP); 2335 } 2336 2337 /* 2338 * hammer2_vop_nrmdir { nch, dvp, cred } 2339 */ 2340 static 2341 int 2342 hammer2_vop_nrmdir(struct vop_nrmdir_args *ap) 2343 { 2344 #if 0 2345 hammer2_xop_unlink_t *xop; 2346 hammer2_inode_t *dip; 2347 hammer2_inode_t *ip; 2348 struct namecache *ncp; 2349 struct m_vnode *vprecycle; 2350 int error; 2351 2352 dip = VTOI(ap->a_dvp); 2353 if (dip->pmp->ronly) 2354 return (EROFS); 2355 #if 0 2356 /* allow removals, except user to also bulkfree */ 2357 if (hammer2_vfs_enospace(dip, 0, ap->a_cred) > 1) 2358 return (ENOSPC); 2359 #endif 2360 2361 hammer2_trans_init(dip->pmp, 0); 2362 hammer2_inode_lock(dip, 0); 2363 2364 xop = hammer2_xop_alloc(dip, HAMMER2_XOP_MODIFYING); 2365 2366 ncp = ap->a_nch->ncp; 2367 hammer2_xop_setname(&xop->head, ncp->nc_name, ncp->nc_nlen); 2368 xop->isdir = 1; 2369 xop->dopermanent = 0; 2370 hammer2_xop_start(&xop->head, &hammer2_unlink_desc); 2371 2372 /* 2373 * Collect the real inode and adjust nlinks, destroy the real 2374 * inode if nlinks transitions to 0 and it was the real inode 2375 * (else it has already been removed). 2376 */ 2377 error = hammer2_xop_collect(&xop->head, 0); 2378 error = hammer2_error_to_errno(error); 2379 vprecycle = NULL; 2380 2381 if (error == 0) { 2382 ip = hammer2_inode_get(dip->pmp, &xop->head, -1, -1); 2383 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 2384 if (ip) { 2385 hammer2_inode_unlink_finisher(ip, &vprecycle); 2386 hammer2_inode_depend(dip, ip); /* after modified */ 2387 hammer2_inode_unlock(ip); 2388 } 2389 } else { 2390 hammer2_xop_retire(&xop->head, HAMMER2_XOPMASK_VOP); 2391 } 2392 2393 /* 2394 * Update dip's mtime 2395 */ 2396 if (error == 0) { 2397 uint64_t mtime; 2398 2399 /*hammer2_inode_lock(dip, HAMMER2_RESOLVE_SHARED);*/ 2400 hammer2_update_time(&mtime); 2401 hammer2_inode_modify(dip); 2402 dip->meta.mtime = mtime; 2403 /*hammer2_inode_unlock(dip);*/ 2404 } 2405 hammer2_inode_unlock(dip); 2406 2407 hammer2_trans_done(dip->pmp, HAMMER2_TRANS_SIDEQ); 2408 if (error == 0) { 2409 cache_unlink(ap->a_nch); 2410 hammer2_knote(ap->a_dvp, NOTE_WRITE | NOTE_LINK); 2411 } 2412 if (vprecycle) 2413 hammer2_inode_vprecycle(vprecycle); 2414 return (error); 2415 #endif 2416 return (EOPNOTSUPP); 2417 } 2418 2419 /* 2420 * hammer2_vop_nrename { fnch, tnch, fdvp, tdvp, cred } 2421 */ 2422 static 2423 int 2424 hammer2_vop_nrename(struct vop_nrename_args *ap) 2425 { 2426 #if 0 2427 struct namecache *fncp; 2428 struct namecache *tncp; 2429 hammer2_inode_t *fdip; /* source directory */ 2430 hammer2_inode_t *tdip; /* target directory */ 2431 hammer2_inode_t *ip; /* file being renamed */ 2432 hammer2_inode_t *tip; /* replaced target during rename or NULL */ 2433 struct m_vnode *vprecycle; 2434 const char *fname; 2435 size_t fname_len; 2436 const char *tname; 2437 size_t tname_len; 2438 int error; 2439 int update_tdip; 2440 int update_fdip; 2441 hammer2_key_t tlhc; 2442 2443 if (ap->a_fdvp->v_mount != ap->a_tdvp->v_mount) 2444 return(EXDEV); 2445 if (ap->a_fdvp->v_mount != ap->a_fnch->ncp->nc_vp->v_mount) 2446 return(EXDEV); 2447 2448 fdip = VTOI(ap->a_fdvp); /* source directory */ 2449 tdip = VTOI(ap->a_tdvp); /* target directory */ 2450 2451 if (fdip->pmp->ronly || (fdip->pmp->flags & HAMMER2_PMPF_EMERG)) 2452 return (EROFS); 2453 if (hammer2_vfs_enospace(fdip, 0, ap->a_cred) > 1) 2454 return (ENOSPC); 2455 2456 fncp = ap->a_fnch->ncp; /* entry name in source */ 2457 fname = fncp->nc_name; 2458 fname_len = fncp->nc_nlen; 2459 2460 tncp = ap->a_tnch->ncp; /* entry name in target */ 2461 tname = tncp->nc_name; 2462 tname_len = tncp->nc_nlen; 2463 2464 hammer2_trans_init(tdip->pmp, 0); 2465 2466 update_tdip = 0; 2467 update_fdip = 0; 2468 2469 ip = VTOI(fncp->nc_vp); 2470 hammer2_inode_ref(ip); /* extra ref */ 2471 2472 /* 2473 * Lookup the target name to determine if a directory entry 2474 * is being overwritten. We only hold related inode locks 2475 * temporarily, the operating system is expected to protect 2476 * against rename races. 2477 */ 2478 tip = tncp->nc_vp ? VTOI(tncp->nc_vp) : NULL; 2479 if (tip) 2480 hammer2_inode_ref(tip); /* extra ref */ 2481 2482 /* 2483 * Can return NULL and error == EXDEV if the common parent 2484 * crosses a directory with the xlink flag set. 2485 * 2486 * For now try to avoid deadlocks with a simple pointer address 2487 * test. (tip) can be NULL. 2488 */ 2489 error = 0; 2490 { 2491 hammer2_inode_t *ip1 = fdip; 2492 hammer2_inode_t *ip2 = tdip; 2493 hammer2_inode_t *ip3 = ip; 2494 hammer2_inode_t *ip4 = tip; /* may be NULL */ 2495 2496 if (fdip > tdip) { 2497 ip1 = tdip; 2498 ip2 = fdip; 2499 } 2500 if (tip && ip > tip) { 2501 ip3 = tip; 2502 ip4 = ip; 2503 } 2504 hammer2_inode_lock4(ip1, ip2, ip3, ip4); 2505 } 2506 2507 /* 2508 * Resolve the collision space for (tdip, tname, tname_len) 2509 * 2510 * tdip must be held exclusively locked to prevent races since 2511 * multiple filenames can end up in the same collision space. 2512 */ 2513 { 2514 hammer2_xop_scanlhc_t *sxop; 2515 hammer2_tid_t lhcbase; 2516 2517 tlhc = hammer2_dirhash(tname, tname_len); 2518 lhcbase = tlhc; 2519 sxop = hammer2_xop_alloc(tdip, HAMMER2_XOP_MODIFYING); 2520 sxop->lhc = tlhc; 2521 hammer2_xop_start(&sxop->head, &hammer2_scanlhc_desc); 2522 while ((error = hammer2_xop_collect(&sxop->head, 0)) == 0) { 2523 if (tlhc != sxop->head.cluster.focus->bref.key) 2524 break; 2525 ++tlhc; 2526 } 2527 error = hammer2_error_to_errno(error); 2528 hammer2_xop_retire(&sxop->head, HAMMER2_XOPMASK_VOP); 2529 2530 if (error) { 2531 if (error != ENOENT) 2532 goto done2; 2533 ++tlhc; 2534 error = 0; 2535 } 2536 if ((lhcbase ^ tlhc) & ~HAMMER2_DIRHASH_LOMASK) { 2537 error = ENOSPC; 2538 goto done2; 2539 } 2540 } 2541 2542 /* 2543 * Ready to go, issue the rename to the backend. Note that meta-data 2544 * updates to the related inodes occur separately from the rename 2545 * operation. 2546 * 2547 * NOTE: While it is not necessary to update ip->meta.name*, doing 2548 * so aids catastrophic recovery and debugging. 2549 */ 2550 if (error == 0) { 2551 hammer2_xop_nrename_t *xop4; 2552 2553 xop4 = hammer2_xop_alloc(fdip, HAMMER2_XOP_MODIFYING); 2554 xop4->lhc = tlhc; 2555 xop4->ip_key = ip->meta.name_key; 2556 hammer2_xop_setip2(&xop4->head, ip); 2557 hammer2_xop_setip3(&xop4->head, tdip); 2558 if (tip && tip->meta.type == HAMMER2_OBJTYPE_DIRECTORY) 2559 hammer2_xop_setip4(&xop4->head, tip); 2560 hammer2_xop_setname(&xop4->head, fname, fname_len); 2561 hammer2_xop_setname2(&xop4->head, tname, tname_len); 2562 hammer2_xop_start(&xop4->head, &hammer2_nrename_desc); 2563 2564 error = hammer2_xop_collect(&xop4->head, 0); 2565 error = hammer2_error_to_errno(error); 2566 hammer2_xop_retire(&xop4->head, HAMMER2_XOPMASK_VOP); 2567 2568 if (error == ENOENT) 2569 error = 0; 2570 2571 /* 2572 * Update inode meta-data. 2573 * 2574 * WARNING! The in-memory inode (ip) structure does not 2575 * maintain a copy of the inode's filename buffer. 2576 */ 2577 if (error == 0 && 2578 (ip->meta.name_key & HAMMER2_DIRHASH_VISIBLE)) { 2579 hammer2_inode_modify(ip); 2580 ip->meta.name_len = tname_len; 2581 ip->meta.name_key = tlhc; 2582 } 2583 if (error == 0) { 2584 hammer2_inode_modify(ip); 2585 ip->meta.iparent = tdip->meta.inum; 2586 } 2587 update_fdip = 1; 2588 update_tdip = 1; 2589 } 2590 2591 done2: 2592 /* 2593 * If no error, the backend has replaced the target directory entry. 2594 * We must adjust nlinks on the original replace target if it exists. 2595 */ 2596 vprecycle = NULL; 2597 if (error == 0 && tip) { 2598 hammer2_inode_unlink_finisher(tip, &vprecycle); 2599 } 2600 2601 /* 2602 * Update directory mtimes to represent the something changed. 2603 */ 2604 if (update_fdip || update_tdip) { 2605 uint64_t mtime; 2606 2607 hammer2_update_time(&mtime); 2608 if (update_fdip) { 2609 hammer2_inode_modify(fdip); 2610 fdip->meta.mtime = mtime; 2611 } 2612 if (update_tdip) { 2613 hammer2_inode_modify(tdip); 2614 tdip->meta.mtime = mtime; 2615 } 2616 } 2617 if (tip) { 2618 hammer2_inode_unlock(tip); 2619 hammer2_inode_drop(tip); 2620 } 2621 hammer2_inode_unlock(ip); 2622 hammer2_inode_unlock(tdip); 2623 hammer2_inode_unlock(fdip); 2624 hammer2_inode_drop(ip); 2625 hammer2_trans_done(tdip->pmp, HAMMER2_TRANS_SIDEQ); 2626 2627 /* 2628 * Issue the namecache update after unlocking all the internal 2629 * hammer2 structures, otherwise we might deadlock. 2630 * 2631 * WARNING! The target namespace must be updated atomically, 2632 * and we depend on cache_rename() to handle that for 2633 * us. Do not do a separate cache_unlink() because 2634 * that leaves a small window of opportunity for other 2635 * threads to allocate the target namespace before we 2636 * manage to complete our rename. 2637 * 2638 * WARNING! cache_rename() (and cache_unlink()) will properly 2639 * set VREF_FINALIZE on any attached vnode. Do not 2640 * call cache_setunresolved() manually before-hand as 2641 * this will prevent the flag from being set later via 2642 * cache_rename(). If VREF_FINALIZE is not properly set 2643 * and the inode is no longer in the topology, related 2644 * chains can remain dirty indefinitely. 2645 */ 2646 if (error == 0 && tip) { 2647 /*cache_unlink(ap->a_tnch); see above */ 2648 /*cache_setunresolved(ap->a_tnch); see above */ 2649 } 2650 if (error == 0) { 2651 cache_rename(ap->a_fnch, ap->a_tnch); 2652 hammer2_knote(ap->a_fdvp, NOTE_WRITE); 2653 hammer2_knote(ap->a_tdvp, NOTE_WRITE); 2654 hammer2_knote(fncp->nc_vp, NOTE_RENAME); 2655 } 2656 if (vprecycle) 2657 hammer2_inode_vprecycle(vprecycle); 2658 2659 return (error); 2660 #endif 2661 return (EOPNOTSUPP); 2662 } 2663 2664 /* 2665 * hammer2_vop_ioctl { vp, command, data, fflag, cred } 2666 */ 2667 static 2668 int 2669 hammer2_vop_ioctl(struct vop_ioctl_args *ap) 2670 { 2671 #if 0 2672 hammer2_inode_t *ip; 2673 int error; 2674 2675 ip = VTOI(ap->a_vp); 2676 2677 error = hammer2_ioctl(ip, ap->a_command, (void *)ap->a_data, 2678 ap->a_fflag, ap->a_cred); 2679 return (error); 2680 #endif 2681 return (EOPNOTSUPP); 2682 } 2683 2684 static 2685 int 2686 hammer2_vop_mountctl(struct vop_mountctl_args *ap) 2687 { 2688 #if 0 2689 struct mount *mp; 2690 hammer2_pfs_t *pmp; 2691 int rc; 2692 2693 switch (ap->a_op) { 2694 case (MOUNTCTL_SET_EXPORT): 2695 mp = ap->a_head.a_ops->head.vv_mount; 2696 pmp = MPTOPMP(mp); 2697 2698 if (ap->a_ctllen != sizeof(struct export_args)) 2699 rc = (EINVAL); 2700 else 2701 rc = vfs_export(mp, &pmp->export, 2702 (const struct export_args *)ap->a_ctl); 2703 break; 2704 default: 2705 rc = vop_stdmountctl(ap); 2706 break; 2707 } 2708 return (rc); 2709 #endif 2710 return (EOPNOTSUPP); 2711 } 2712 2713 /* 2714 * KQFILTER 2715 */ 2716 /* 2717 static void filt_hammer2detach(struct knote *kn); 2718 static int filt_hammer2read(struct knote *kn, long hint); 2719 static int filt_hammer2write(struct knote *kn, long hint); 2720 static int filt_hammer2vnode(struct knote *kn, long hint); 2721 2722 static struct filterops hammer2read_filtops = 2723 { FILTEROP_ISFD | FILTEROP_MPSAFE, 2724 NULL, filt_hammer2detach, filt_hammer2read }; 2725 static struct filterops hammer2write_filtops = 2726 { FILTEROP_ISFD | FILTEROP_MPSAFE, 2727 NULL, filt_hammer2detach, filt_hammer2write }; 2728 static struct filterops hammer2vnode_filtops = 2729 { FILTEROP_ISFD | FILTEROP_MPSAFE, 2730 NULL, filt_hammer2detach, filt_hammer2vnode }; 2731 */ 2732 2733 static 2734 int 2735 hammer2_vop_kqfilter(struct vop_kqfilter_args *ap) 2736 { 2737 #if 0 2738 struct m_vnode *vp = ap->a_vp; 2739 struct knote *kn = ap->a_kn; 2740 2741 switch (kn->kn_filter) { 2742 case EVFILT_READ: 2743 kn->kn_fop = &hammer2read_filtops; 2744 break; 2745 case EVFILT_WRITE: 2746 kn->kn_fop = &hammer2write_filtops; 2747 break; 2748 case EVFILT_VNODE: 2749 kn->kn_fop = &hammer2vnode_filtops; 2750 break; 2751 default: 2752 return (EOPNOTSUPP); 2753 } 2754 2755 kn->kn_hook = (caddr_t)vp; 2756 2757 knote_insert(&vp->v_pollinfo.vpi_kqinfo.ki_note, kn); 2758 2759 return(0); 2760 #endif 2761 return (EOPNOTSUPP); 2762 } 2763 2764 #if 0 2765 static void 2766 filt_hammer2detach(struct knote *kn) 2767 { 2768 struct m_vnode *vp = (void *)kn->kn_hook; 2769 2770 knote_remove(&vp->v_pollinfo.vpi_kqinfo.ki_note, kn); 2771 } 2772 2773 static int 2774 filt_hammer2read(struct knote *kn, long hint) 2775 { 2776 struct m_vnode *vp = (void *)kn->kn_hook; 2777 hammer2_inode_t *ip = VTOI(vp); 2778 off_t off; 2779 2780 if (hint == NOTE_REVOKE) { 2781 kn->kn_flags |= (EV_EOF | EV_NODATA | EV_ONESHOT); 2782 return(1); 2783 } 2784 off = ip->meta.size - kn->kn_fp->f_offset; 2785 kn->kn_data = (off < INTPTR_MAX) ? off : INTPTR_MAX; 2786 if (kn->kn_sfflags & NOTE_OLDAPI) 2787 return(1); 2788 return (kn->kn_data != 0); 2789 } 2790 2791 2792 static int 2793 filt_hammer2write(struct knote *kn, long hint) 2794 { 2795 if (hint == NOTE_REVOKE) 2796 kn->kn_flags |= (EV_EOF | EV_NODATA | EV_ONESHOT); 2797 kn->kn_data = 0; 2798 return (1); 2799 } 2800 2801 static int 2802 filt_hammer2vnode(struct knote *kn, long hint) 2803 { 2804 if (kn->kn_sfflags & hint) 2805 kn->kn_fflags |= hint; 2806 if (hint == NOTE_REVOKE) { 2807 kn->kn_flags |= (EV_EOF | EV_NODATA); 2808 return (1); 2809 } 2810 return (kn->kn_fflags != 0); 2811 } 2812 #endif 2813 2814 /* 2815 * FIFO VOPS 2816 */ 2817 static 2818 int 2819 hammer2_vop_markatime(struct vop_markatime_args *ap) 2820 { 2821 #if 0 2822 hammer2_inode_t *ip; 2823 struct m_vnode *vp; 2824 2825 vp = ap->a_vp; 2826 ip = VTOI(vp); 2827 2828 if (ip->pmp->ronly || (ip->pmp->flags & HAMMER2_PMPF_EMERG)) 2829 return (EROFS); 2830 return(0); 2831 #endif 2832 return (EOPNOTSUPP); 2833 } 2834 2835 static 2836 int 2837 hammer2_vop_fifokqfilter(struct vop_kqfilter_args *ap) 2838 { 2839 #if 0 2840 int error; 2841 2842 error = VOCALL(&fifo_vnode_vops, &ap->a_head); 2843 if (error) 2844 error = hammer2_vop_kqfilter(ap); 2845 return(error); 2846 #endif 2847 return (EOPNOTSUPP); 2848 } 2849 2850 /* 2851 * VOPS vector 2852 */ 2853 struct vop_ops hammer2_vnode_vops = { 2854 .vop_default = vop_defaultop, 2855 .vop_fsync = hammer2_vop_fsync, 2856 .vop_getpages = vop_stdgetpages, 2857 .vop_putpages = vop_stdputpages, 2858 .vop_access = hammer2_vop_access, 2859 .vop_advlock = hammer2_vop_advlock, 2860 .vop_close = hammer2_vop_close, 2861 .vop_nlink = hammer2_vop_nlink, 2862 .vop_ncreate = hammer2_vop_ncreate, 2863 .vop_nsymlink = hammer2_vop_nsymlink, 2864 .vop_nremove = hammer2_vop_nremove, 2865 .vop_nrmdir = hammer2_vop_nrmdir, 2866 .vop_nrename = hammer2_vop_nrename, 2867 .vop_getattr = hammer2_vop_getattr, 2868 .vop_getattr_lite = hammer2_vop_getattr_lite, 2869 .vop_setattr = hammer2_vop_setattr, 2870 .vop_readdir = hammer2_vop_readdir, 2871 .vop_readlink = hammer2_vop_readlink, 2872 .vop_read = hammer2_vop_read, 2873 .vop_write = hammer2_vop_write, 2874 .vop_open = hammer2_vop_open, 2875 .vop_inactive = hammer2_vop_inactive, 2876 .vop_reclaim = hammer2_vop_reclaim, 2877 .vop_nresolve = hammer2_vop_nresolve, 2878 .vop_nlookupdotdot = hammer2_vop_nlookupdotdot, 2879 .vop_nmkdir = hammer2_vop_nmkdir, 2880 .vop_nmknod = hammer2_vop_nmknod, 2881 .vop_ioctl = hammer2_vop_ioctl, 2882 .vop_mountctl = hammer2_vop_mountctl, 2883 .vop_bmap = hammer2_vop_bmap, 2884 .vop_strategy = hammer2_vop_strategy, 2885 .vop_kqfilter = hammer2_vop_kqfilter 2886 }; 2887 2888 struct vop_ops hammer2_spec_vops = { 2889 .vop_default = vop_defaultop, 2890 .vop_fsync = hammer2_vop_fsync, 2891 .vop_read = vop_stdnoread, 2892 .vop_write = vop_stdnowrite, 2893 .vop_access = hammer2_vop_access, 2894 .vop_close = hammer2_vop_close, 2895 .vop_markatime = hammer2_vop_markatime, 2896 .vop_getattr = hammer2_vop_getattr, 2897 .vop_inactive = hammer2_vop_inactive, 2898 .vop_reclaim = hammer2_vop_reclaim, 2899 .vop_setattr = hammer2_vop_setattr 2900 }; 2901 2902 struct vop_ops hammer2_fifo_vops = { 2903 .vop_default = fifo_vnoperate, 2904 .vop_fsync = hammer2_vop_fsync, 2905 #if 0 2906 .vop_read = hammer2_vop_fiforead, 2907 .vop_write = hammer2_vop_fifowrite, 2908 #endif 2909 .vop_access = hammer2_vop_access, 2910 #if 0 2911 .vop_close = hammer2_vop_fifoclose, 2912 #endif 2913 .vop_markatime = hammer2_vop_markatime, 2914 .vop_getattr = hammer2_vop_getattr, 2915 .vop_inactive = hammer2_vop_inactive, 2916 .vop_reclaim = hammer2_vop_reclaim, 2917 .vop_setattr = hammer2_vop_setattr, 2918 .vop_kqfilter = hammer2_vop_fifokqfilter 2919 }; 2920 2921