sys/vfs/hammer2/hammer2_vnops.c

   1 /*
   2  * Copyright (c) 2011-2014 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@dragonflybsd.org>
   6  * by Venkatesh Srinivas <vsrinivas@dragonflybsd.org>
   7  * by Daniel Flores (GSOC 2013 - mentored by Matthew Dillon, compression)
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  * 3. Neither the name of The DragonFly Project nor the names of its
  20  *    contributors may be used to endorse or promote products derived
  21  *    from this software without specific, prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  26  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  27  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  28  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  29  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  30  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  31  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  32  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  33  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36 /*
  37  * Kernel Filesystem interface
  38  *
  39  * NOTE! local ipdata pointers must be reloaded on any modifying operation
  40  *       to the inode as its underlying chain may have changed.
  41  */
  42
  43 #include <sys/param.h>
  44 #include <sys/systm.h>
  45 #include <sys/kernel.h>
  46 #include <sys/fcntl.h>
  47 #include <sys/buf.h>
  48 #include <sys/proc.h>
  49 #include <sys/namei.h>
  50 #include <sys/mount.h>
  51 #include <sys/vnode.h>
  52 #include <sys/mountctl.h>
  53 #include <sys/dirent.h>
  54 #include <sys/uio.h>
  55 #include <sys/objcache.h>
  56 #include <sys/event.h>
  57 #include <sys/file.h>
  58 #include <vfs/fifofs/fifo.h>
  59
  60 #include "hammer2.h"
  61 #include "hammer2_lz4.h"
  62
  63 #include "zlib/hammer2_zlib.h"
  64
  65 #define ZFOFFSET        (-2LL)
  66
  67 static int hammer2_read_file(hammer2_inode_t *ip, struct uio *uio,
  68                                 int seqcount);
  69 static int hammer2_write_file(hammer2_inode_t *ip, struct uio *uio,
  70                                 int ioflag, int seqcount);
  71 static void hammer2_extend_file(hammer2_inode_t *ip, hammer2_key_t nsize);
  72 static void hammer2_truncate_file(hammer2_inode_t *ip, hammer2_key_t nsize);
  73
  74 struct objcache *cache_buffer_read;
  75 struct objcache *cache_buffer_write;
  76
  77 /*
  78  * Callback used in read path in case that a block is compressed with LZ4.
  79  */
  80 static
  81 void
  82 hammer2_decompress_LZ4_callback(const char *data, u_int bytes, struct bio *bio)
  83 {
  84         struct buf *bp;
  85         char *compressed_buffer;
  86         int compressed_size;
  87         int result;
  88
  89         bp = bio->bio_buf;
  90
  91 #if 0
  92         if bio->bio_caller_info2.index &&
  93               bio->bio_caller_info1.uvalue32 !=
  94               crc32(bp->b_data, bp->b_bufsize) --- return error
  95 #endif
  96
  97         KKASSERT(bp->b_bufsize <= HAMMER2_PBUFSIZE);
  98         compressed_size = *(const int *)data;
  99         KKASSERT(compressed_size <= bytes - sizeof(int));
 100
 101         compressed_buffer = objcache_get(cache_buffer_read, M_INTWAIT);
 102         result = LZ4_decompress_safe(__DECONST(char *, &data[sizeof(int)]),
 103                                      compressed_buffer,
 104                                      compressed_size,
 105                                      bp->b_bufsize);
 106         if (result < 0) {
 107                 kprintf("READ PATH: Error during decompression."
 108                         "bio %016jx/%d\n",
 109                         (intmax_t)bio->bio_offset, bytes);
 110                 /* make sure it isn't random garbage */
 111                 bzero(compressed_buffer, bp->b_bufsize);
 112         }
 113         KKASSERT(result <= bp->b_bufsize);
 114         bcopy(compressed_buffer, bp->b_data, bp->b_bufsize);
 115         if (result < bp->b_bufsize)
 116                 bzero(bp->b_data + result, bp->b_bufsize - result);
 117         objcache_put(cache_buffer_read, compressed_buffer);
 118         bp->b_resid = 0;
 119         bp->b_flags |= B_AGE;
 120 }
 121
 122 /*
 123  * Callback used in read path in case that a block is compressed with ZLIB.
 124  * It is almost identical to LZ4 callback, so in theory they can be unified,
 125  * but we didn't want to make changes in bio structure for that.
 126  */
 127 static
 128 void
 129 hammer2_decompress_ZLIB_callback(const char *data, u_int bytes, struct bio *bio)
 130 {
 131         struct buf *bp;
 132         char *compressed_buffer;
 133         z_stream strm_decompress;
 134         int result;
 135         int ret;
 136
 137         bp = bio->bio_buf;
 138
 139         KKASSERT(bp->b_bufsize <= HAMMER2_PBUFSIZE);
 140         strm_decompress.avail_in = 0;
 141         strm_decompress.next_in = Z_NULL;
 142
 143         ret = inflateInit(&strm_decompress);
 144
 145         if (ret != Z_OK)
 146                 kprintf("HAMMER2 ZLIB: Fatal error in inflateInit.\n");
 147
 148         compressed_buffer = objcache_get(cache_buffer_read, M_INTWAIT);
 149         strm_decompress.next_in = __DECONST(char *, data);
 150
 151         /* XXX supply proper size, subset of device bp */
 152         strm_decompress.avail_in = bytes;
 153         strm_decompress.next_out = compressed_buffer;
 154         strm_decompress.avail_out = bp->b_bufsize;
 155
 156         ret = inflate(&strm_decompress, Z_FINISH);
 157         if (ret != Z_STREAM_END) {
 158                 kprintf("HAMMER2 ZLIB: Fatar error during decompression.\n");
 159                 bzero(compressed_buffer, bp->b_bufsize);
 160         }
 161         bcopy(compressed_buffer, bp->b_data, bp->b_bufsize);
 162         result = bp->b_bufsize - strm_decompress.avail_out;
 163         if (result < bp->b_bufsize)
 164                 bzero(bp->b_data + result, strm_decompress.avail_out);
 165         objcache_put(cache_buffer_read, compressed_buffer);
 166         ret = inflateEnd(&strm_decompress);
 167
 168         bp->b_resid = 0;
 169         bp->b_flags |= B_AGE;
 170 }
 171
 172 static __inline
 173 void
 174 hammer2_knote(struct vnode *vp, int flags)
 175 {
 176         if (flags)
 177                 KNOTE(&vp->v_pollinfo.vpi_kqinfo.ki_note, flags);
 178 }
 179
 180 /*
 181  * Last reference to a vnode is going away but it is still cached.
 182  */
 183 static
 184 int
 185 hammer2_vop_inactive(struct vop_inactive_args *ap)
 186 {
 187         hammer2_inode_t *ip;
 188         hammer2_cluster_t *cluster;
 189         struct vnode *vp;
 190
 191         LOCKSTART;
 192         vp = ap->a_vp;
 193         ip = VTOI(vp);
 194
 195         /*
 196          * Degenerate case
 197          */
 198         if (ip == NULL) {
 199                 vrecycle(vp);
 200                 LOCKSTOP;
 201                 return (0);
 202         }
 203
 204         /*
 205          * Detect updates to the embedded data which may be synchronized by
 206          * the strategy code.  Simply mark the inode modified so it gets
 207          * picked up by our normal flush.
 208          */
 209         cluster = hammer2_inode_lock(ip, HAMMER2_RESOLVE_NEVER |
 210                                          HAMMER2_RESOLVE_RDONLY);
 211         KKASSERT(cluster);
 212
 213         /*
 214          * Check for deleted inodes and recycle immediately.
 215          *
 216          * WARNING: nvtruncbuf() can only be safely called without the inode
 217          *          lock held due to the way our write thread works.
 218          */
 219         if (hammer2_cluster_isunlinked(cluster)) {
 220                 hammer2_key_t lbase;
 221                 int nblksize;
 222
 223                 nblksize = hammer2_calc_logical(ip, 0, &lbase, NULL);
 224                 hammer2_inode_unlock(ip, cluster);
 225                 nvtruncbuf(vp, 0, nblksize, 0, 0);
 226                 vrecycle(vp);
 227         } else {
 228                 hammer2_inode_unlock(ip, cluster);
 229         }
 230         LOCKSTOP;
 231         return (0);
 232 }
 233
 234 /*
 235  * Reclaim a vnode so that it can be reused; after the inode is
 236  * disassociated, the filesystem must manage it alone.
 237  */
 238 static
 239 int
 240 hammer2_vop_reclaim(struct vop_reclaim_args *ap)
 241 {
 242         hammer2_cluster_t *cluster;
 243         hammer2_inode_t *ip;
 244         hammer2_pfs_t *pmp;
 245         struct vnode *vp;
 246
 247         LOCKSTART;
 248         vp = ap->a_vp;
 249         ip = VTOI(vp);
 250         if (ip == NULL) {
 251                 LOCKSTOP;
 252                 return(0);
 253         }
 254
 255         /*
 256          * Inode must be locked for reclaim.
 257          */
 258         pmp = ip->pmp;
 259         cluster = hammer2_inode_lock(ip, HAMMER2_RESOLVE_NEVER |
 260                                          HAMMER2_RESOLVE_RDONLY);
 261
 262         /*
 263          * The final close of a deleted file or directory marks it for
 264          * destruction.  The DELETED flag allows the flusher to shortcut
 265          * any modified blocks still unflushed (that is, just ignore them).
 266          *
 267          * HAMMER2 usually does not try to optimize the freemap by returning
 268          * deleted blocks to it as it does not usually know how many snapshots
 269          * might be referencing portions of the file/dir.
 270          */
 271         vp->v_data = NULL;
 272         ip->vp = NULL;
 273
 274         /*
 275          * NOTE! We do not attempt to flush chains here, flushing is
 276          *       really fragile and could also deadlock.
 277          */
 278         vclrisdirty(vp);
 279
 280         /*
 281          * A reclaim can occur at any time so we cannot safely start a
 282          * transaction to handle reclamation of unlinked files.  Instead,
 283          * the ip is left with a reference and placed on a linked list and
 284          * handled later on.
 285          */
 286         if (hammer2_cluster_isunlinked(cluster)) {
 287                 hammer2_inode_unlink_t *ipul;
 288
 289                 ipul = kmalloc(sizeof(*ipul), pmp->minode, M_WAITOK | M_ZERO);
 290                 ipul->ip = ip;
 291
 292                 hammer2_spin_ex(&pmp->list_spin);
 293                 TAILQ_INSERT_TAIL(&pmp->unlinkq, ipul, entry);
 294                 hammer2_spin_unex(&pmp->list_spin);
 295                 hammer2_inode_unlock(ip, cluster);      /* unlock */
 296                 /* retain ref from vp for ipul */
 297         } else {
 298                 hammer2_inode_unlock(ip, cluster);      /* unlock */
 299                 hammer2_inode_drop(ip);                 /* vp ref */
 300         }
 301         /* cluster no longer referenced */
 302         /* cluster = NULL; not needed */
 303
 304         /*
 305          * XXX handle background sync when ip dirty, kernel will no longer
 306          * notify us regarding this inode because there is no longer a
 307          * vnode attached to it.
 308          */
 309
 310         LOCKSTOP;
 311         return (0);
 312 }
 313
 314 static
 315 int
 316 hammer2_vop_fsync(struct vop_fsync_args *ap)
 317 {
 318         hammer2_inode_t *ip;
 319         hammer2_trans_t trans;
 320         hammer2_cluster_t *cluster;
 321         struct vnode *vp;
 322
 323         LOCKSTART;
 324         vp = ap->a_vp;
 325         ip = VTOI(vp);
 326
 327 #if 0
 328         /* XXX can't do this yet */
 329         hammer2_trans_init(&trans, ip->pmp, HAMMER2_TRANS_ISFLUSH);
 330         vfsync(vp, ap->a_waitfor, 1, NULL, NULL);
 331 #endif
 332         hammer2_trans_init(&trans, ip->pmp, 0);
 333         vfsync(vp, ap->a_waitfor, 1, NULL, NULL);
 334
 335         /*
 336          * Calling chain_flush here creates a lot of duplicative
 337          * COW operations due to non-optimal vnode ordering.
 338          *
 339          * Only do it for an actual fsync() syscall.  The other forms
 340          * which call this function will eventually call chain_flush
 341          * on the volume root as a catch-all, which is far more optimal.
 342          */
 343         cluster = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS);
 344         atomic_clear_int(&ip->flags, HAMMER2_INODE_MODIFIED);
 345         vclrisdirty(vp);
 346         if (ip->flags & (HAMMER2_INODE_RESIZED|HAMMER2_INODE_MTIME))
 347                 hammer2_inode_fsync(&trans, ip, cluster);
 348
 349 #if 0
 350         /*
 351          * XXX creates discontinuity w/modify_tid
 352          */
 353         if (ap->a_flags & VOP_FSYNC_SYSCALL) {
 354                 hammer2_flush(&trans, cluster);
 355         }
 356 #endif
 357         hammer2_inode_unlock(ip, cluster);
 358         hammer2_trans_done(&trans);
 359
 360         LOCKSTOP;
 361         return (0);
 362 }
 363
 364 static
 365 int
 366 hammer2_vop_access(struct vop_access_args *ap)
 367 {
 368         hammer2_inode_t *ip = VTOI(ap->a_vp);
 369         const hammer2_inode_data_t *ripdata;
 370         hammer2_cluster_t *cluster;
 371         uid_t uid;
 372         gid_t gid;
 373         int error;
 374
 375         LOCKSTART;
 376         cluster = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS |
 377                                          HAMMER2_RESOLVE_SHARED);
 378         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
 379         uid = hammer2_to_unix_xid(&ripdata->uid);
 380         gid = hammer2_to_unix_xid(&ripdata->gid);
 381         error = vop_helper_access(ap, uid, gid, ripdata->mode, ripdata->uflags);
 382         hammer2_inode_unlock(ip, cluster);
 383
 384         LOCKSTOP;
 385         return (error);
 386 }
 387
 388 static
 389 int
 390 hammer2_vop_getattr(struct vop_getattr_args *ap)
 391 {
 392         const hammer2_inode_data_t *ripdata;
 393         hammer2_cluster_t *cluster;
 394         hammer2_pfs_t *pmp;
 395         hammer2_inode_t *ip;
 396         struct vnode *vp;
 397         struct vattr *vap;
 398
 399         LOCKSTART;
 400         vp = ap->a_vp;
 401         vap = ap->a_vap;
 402
 403         ip = VTOI(vp);
 404         pmp = ip->pmp;
 405
 406         cluster = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS |
 407                                          HAMMER2_RESOLVE_SHARED);
 408         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
 409         KKASSERT(hammer2_cluster_type(cluster) == HAMMER2_BREF_TYPE_INODE);
 410
 411         vap->va_fsid = pmp->mp->mnt_stat.f_fsid.val[0];
 412         vap->va_fileid = ripdata->inum;
 413         vap->va_mode = ripdata->mode;
 414         vap->va_nlink = ripdata->nlinks;
 415         vap->va_uid = hammer2_to_unix_xid(&ripdata->uid);
 416         vap->va_gid = hammer2_to_unix_xid(&ripdata->gid);
 417         vap->va_rmajor = 0;
 418         vap->va_rminor = 0;
 419         vap->va_size = ip->size;        /* protected by shared lock */
 420         vap->va_blocksize = HAMMER2_PBUFSIZE;
 421         vap->va_flags = ripdata->uflags;
 422         hammer2_time_to_timespec(ripdata->ctime, &vap->va_ctime);
 423         hammer2_time_to_timespec(ripdata->mtime, &vap->va_mtime);
 424         hammer2_time_to_timespec(ripdata->mtime, &vap->va_atime);
 425         vap->va_gen = 1;
 426         vap->va_bytes = vap->va_size;   /* XXX */
 427         vap->va_type = hammer2_get_vtype(ripdata);
 428         vap->va_filerev = 0;
 429         vap->va_uid_uuid = ripdata->uid;
 430         vap->va_gid_uuid = ripdata->gid;
 431         vap->va_vaflags = VA_UID_UUID_VALID | VA_GID_UUID_VALID |
 432                           VA_FSID_UUID_VALID;
 433
 434         hammer2_inode_unlock(ip, cluster);
 435
 436         LOCKSTOP;
 437         return (0);
 438 }
 439
 440 static
 441 int
 442 hammer2_vop_setattr(struct vop_setattr_args *ap)
 443 {
 444         const hammer2_inode_data_t *ripdata;
 445         hammer2_inode_data_t *wipdata;
 446         hammer2_inode_t *ip;
 447         hammer2_cluster_t *cluster;
 448         hammer2_trans_t trans;
 449         struct vnode *vp;
 450         struct vattr *vap;
 451         int error;
 452         int kflags = 0;
 453         int domtime = 0;
 454         int dosync = 0;
 455         uint64_t ctime;
 456
 457         LOCKSTART;
 458         vp = ap->a_vp;
 459         vap = ap->a_vap;
 460         hammer2_update_time(&ctime);
 461
 462         ip = VTOI(vp);
 463
 464         if (ip->pmp->ronly) {
 465                 LOCKSTOP;
 466                 return(EROFS);
 467         }
 468
 469         hammer2_pfs_memory_wait(ip->pmp);
 470         hammer2_trans_init(&trans, ip->pmp, 0);
 471         cluster = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS);
 472         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
 473         error = 0;
 474
 475         if (vap->va_flags != VNOVAL) {
 476                 u_int32_t flags;
 477
 478                 flags = ripdata->uflags;
 479                 error = vop_helper_setattr_flags(&flags, vap->va_flags,
 480                                          hammer2_to_unix_xid(&ripdata->uid),
 481                                          ap->a_cred);
 482                 if (error == 0) {
 483                         if (ripdata->uflags != flags) {
 484                                 wipdata = hammer2_cluster_modify_ip(&trans, ip,
 485                                                                     cluster, 0);
 486                                 wipdata->uflags = flags;
 487                                 wipdata->ctime = ctime;
 488                                 kflags |= NOTE_ATTRIB;
 489                                 dosync = 1;
 490                                 ripdata = wipdata;
 491                         }
 492                         if (ripdata->uflags & (IMMUTABLE | APPEND)) {
 493                                 error = 0;
 494                                 goto done;
 495                         }
 496                 }
 497                 goto done;
 498         }
 499         if (ripdata->uflags & (IMMUTABLE | APPEND)) {
 500                 error = EPERM;
 501                 goto done;
 502         }
 503         if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
 504                 mode_t cur_mode = ripdata->mode;
 505                 uid_t cur_uid = hammer2_to_unix_xid(&ripdata->uid);
 506                 gid_t cur_gid = hammer2_to_unix_xid(&ripdata->gid);
 507                 uuid_t uuid_uid;
 508                 uuid_t uuid_gid;
 509
 510                 error = vop_helper_chown(ap->a_vp, vap->va_uid, vap->va_gid,
 511                                          ap->a_cred,
 512                                          &cur_uid, &cur_gid, &cur_mode);
 513                 if (error == 0) {
 514                         hammer2_guid_to_uuid(&uuid_uid, cur_uid);
 515                         hammer2_guid_to_uuid(&uuid_gid, cur_gid);
 516                         if (bcmp(&uuid_uid, &ripdata->uid, sizeof(uuid_uid)) ||
 517                             bcmp(&uuid_gid, &ripdata->gid, sizeof(uuid_gid)) ||
 518                             ripdata->mode != cur_mode
 519                         ) {
 520                                 wipdata = hammer2_cluster_modify_ip(&trans, ip,
 521                                                                     cluster, 0);
 522                                 wipdata->uid = uuid_uid;
 523                                 wipdata->gid = uuid_gid;
 524                                 wipdata->mode = cur_mode;
 525                                 wipdata->ctime = ctime;
 526                                 dosync = 1;
 527                                 ripdata = wipdata;
 528                         }
 529                         kflags |= NOTE_ATTRIB;
 530                 }
 531         }
 532
 533         /*
 534          * Resize the file
 535          */
 536         if (vap->va_size != VNOVAL && ip->size != vap->va_size) {
 537                 switch(vp->v_type) {
 538                 case VREG:
 539                         if (vap->va_size == ip->size)
 540                                 break;
 541                         hammer2_inode_unlock(ip, cluster);
 542                         if (vap->va_size < ip->size) {
 543                                 hammer2_truncate_file(ip, vap->va_size);
 544                         } else {
 545                                 hammer2_extend_file(ip, vap->va_size);
 546                         }
 547                         cluster = hammer2_inode_lock(ip,
 548                                                      HAMMER2_RESOLVE_ALWAYS);
 549                         /* RELOAD */
 550                         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
 551                         domtime = 1;
 552                         break;
 553                 default:
 554                         error = EINVAL;
 555                         goto done;
 556                 }
 557         }
 558 #if 0
 559         /* atime not supported */
 560         if (vap->va_atime.tv_sec != VNOVAL) {
 561                 wipdata = hammer2_cluster_modify_ip(&trans, ip, cluster, 0);
 562                 wipdata->atime = hammer2_timespec_to_time(&vap->va_atime);
 563                 kflags |= NOTE_ATTRIB;
 564                 dosync = 1;
 565                 ripdata = wipdata;
 566         }
 567 #endif
 568         if (vap->va_mtime.tv_sec != VNOVAL) {
 569                 wipdata = hammer2_cluster_modify_ip(&trans, ip, cluster, 0);
 570                 wipdata->mtime = hammer2_timespec_to_time(&vap->va_mtime);
 571                 kflags |= NOTE_ATTRIB;
 572                 domtime = 0;
 573                 dosync = 1;
 574                 ripdata = wipdata;
 575         }
 576         if (vap->va_mode != (mode_t)VNOVAL) {
 577                 mode_t cur_mode = ripdata->mode;
 578                 uid_t cur_uid = hammer2_to_unix_xid(&ripdata->uid);
 579                 gid_t cur_gid = hammer2_to_unix_xid(&ripdata->gid);
 580
 581                 error = vop_helper_chmod(ap->a_vp, vap->va_mode, ap->a_cred,
 582                                          cur_uid, cur_gid, &cur_mode);
 583                 if (error == 0 && ripdata->mode != cur_mode) {
 584                         wipdata = hammer2_cluster_modify_ip(&trans, ip,
 585                                                             cluster, 0);
 586                         wipdata->mode = cur_mode;
 587                         wipdata->ctime = ctime;
 588                         kflags |= NOTE_ATTRIB;
 589                         dosync = 1;
 590                         ripdata = wipdata;
 591                 }
 592         }
 593
 594         /*
 595          * If a truncation occurred we must call inode_fsync() now in order
 596          * to trim the related data chains, otherwise a later expansion can
 597          * cause havoc.
 598          */
 599         if (dosync) {
 600                 hammer2_cluster_modsync(cluster);
 601                 dosync = 0;
 602         }
 603         hammer2_inode_fsync(&trans, ip, cluster);
 604
 605         /*
 606          * Cleanup.  If domtime is set an additional inode modification
 607          * must be flagged.  All other modifications will have already
 608          * set INODE_MODIFIED and called vsetisdirty().
 609          */
 610 done:
 611         if (domtime) {
 612                 atomic_set_int(&ip->flags, HAMMER2_INODE_MODIFIED |
 613                                            HAMMER2_INODE_MTIME);
 614                 vsetisdirty(ip->vp);
 615         }
 616         if (dosync)
 617                 hammer2_cluster_modsync(cluster);
 618         hammer2_inode_unlock(ip, cluster);
 619         hammer2_trans_done(&trans);
 620         hammer2_knote(ip->vp, kflags);
 621
 622         LOCKSTOP;
 623         return (error);
 624 }
 625
 626 static
 627 int
 628 hammer2_vop_readdir(struct vop_readdir_args *ap)
 629 {
 630         const hammer2_inode_data_t *ripdata;
 631         hammer2_inode_t *ip;
 632         hammer2_inode_t *xip;
 633         hammer2_cluster_t *cparent;
 634         hammer2_cluster_t *cluster;
 635         hammer2_cluster_t *xcluster;
 636         hammer2_blockref_t bref;
 637         hammer2_tid_t inum;
 638         hammer2_key_t key_next;
 639         hammer2_key_t lkey;
 640         struct uio *uio;
 641         off_t *cookies;
 642         off_t saveoff;
 643         int cookie_index;
 644         int ncookies;
 645         int error;
 646         int dtype;
 647         int r;
 648
 649         LOCKSTART;
 650         ip = VTOI(ap->a_vp);
 651         uio = ap->a_uio;
 652         saveoff = uio->uio_offset;
 653
 654         /*
 655          * Setup cookies directory entry cookies if requested
 656          */
 657         if (ap->a_ncookies) {
 658                 ncookies = uio->uio_resid / 16 + 1;
 659                 if (ncookies > 1024)
 660                         ncookies = 1024;
 661                 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
 662         } else {
 663                 ncookies = -1;
 664                 cookies = NULL;
 665         }
 666         cookie_index = 0;
 667
 668         cparent = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS |
 669                                          HAMMER2_RESOLVE_SHARED);
 670
 671         ripdata = &hammer2_cluster_rdata(cparent)->ipdata;
 672
 673         /*
 674          * Handle artificial entries.  To ensure that only positive 64 bit
 675          * quantities are returned to userland we always strip off bit 63.
 676          * The hash code is designed such that codes 0x0000-0x7FFF are not
 677          * used, allowing us to use these codes for articial entries.
 678          *
 679          * Entry 0 is used for '.' and entry 1 is used for '..'.  Do not
 680          * allow '..' to cross the mount point into (e.g.) the super-root.
 681          */
 682         error = 0;
 683         cluster = (void *)(intptr_t)-1; /* non-NULL for early goto done case */
 684
 685         if (saveoff == 0) {
 686                 inum = ripdata->inum & HAMMER2_DIRHASH_USERMSK;
 687                 r = vop_write_dirent(&error, uio, inum, DT_DIR, 1, ".");
 688                 if (r)
 689                         goto done;
 690                 if (cookies)
 691                         cookies[cookie_index] = saveoff;
 692                 ++saveoff;
 693                 ++cookie_index;
 694                 if (cookie_index == ncookies)
 695                         goto done;
 696         }
 697
 698         if (saveoff == 1) {
 699                 /*
 700                  * Be careful with lockorder when accessing ".."
 701                  *
 702                  * (ip is the current dir. xip is the parent dir).
 703                  */
 704                 inum = ripdata->inum & HAMMER2_DIRHASH_USERMSK;
 705                 while (ip->pip != NULL && ip != ip->pmp->iroot) {
 706                         xip = ip->pip;
 707                         hammer2_inode_ref(xip);
 708                         hammer2_inode_unlock(ip, cparent);
 709                         xcluster = hammer2_inode_lock(xip,
 710                                                       HAMMER2_RESOLVE_ALWAYS |
 711                                                       HAMMER2_RESOLVE_SHARED);
 712
 713                         cparent = hammer2_inode_lock(ip,
 714                                                       HAMMER2_RESOLVE_ALWAYS |
 715                                                       HAMMER2_RESOLVE_SHARED);
 716                         hammer2_inode_drop(xip);
 717                         ripdata = &hammer2_cluster_rdata(cparent)->ipdata;
 718                         if (xip == ip->pip) {
 719                                 inum = hammer2_cluster_rdata(xcluster)->
 720                                         ipdata.inum & HAMMER2_DIRHASH_USERMSK;
 721                                 hammer2_inode_unlock(xip, xcluster);
 722                                 break;
 723                         }
 724                         hammer2_inode_unlock(xip, xcluster);
 725                 }
 726                 r = vop_write_dirent(&error, uio, inum, DT_DIR, 2, "..");
 727                 if (r)
 728                         goto done;
 729                 if (cookies)
 730                         cookies[cookie_index] = saveoff;
 731                 ++saveoff;
 732                 ++cookie_index;
 733                 if (cookie_index == ncookies)
 734                         goto done;
 735         }
 736
 737         lkey = saveoff | HAMMER2_DIRHASH_VISIBLE;
 738         if (hammer2_debug & 0x0020)
 739                 kprintf("readdir: lkey %016jx\n", lkey);
 740
 741         /*
 742          * parent is the inode cluster, already locked for us.  Don't
 743          * double lock shared locks as this will screw up upgrades.
 744          */
 745         if (error) {
 746                 goto done;
 747         }
 748         cluster = hammer2_cluster_lookup(cparent, &key_next, lkey, lkey,
 749                                      HAMMER2_LOOKUP_SHARED);
 750         if (cluster == NULL) {
 751                 cluster = hammer2_cluster_lookup(cparent, &key_next,
 752                                              lkey, (hammer2_key_t)-1,
 753                                              HAMMER2_LOOKUP_SHARED);
 754         }
 755         if (cluster)
 756                 hammer2_cluster_bref(cluster, &bref);
 757         while (cluster) {
 758                 if (hammer2_debug & 0x0020)
 759                         kprintf("readdir: p=%p chain=%p %016jx (next %016jx)\n",
 760                                 cparent->focus, cluster->focus,
 761                                 bref.key, key_next);
 762
 763                 if (bref.type == HAMMER2_BREF_TYPE_INODE) {
 764                         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
 765                         dtype = hammer2_get_dtype(ripdata);
 766                         saveoff = bref.key & HAMMER2_DIRHASH_USERMSK;
 767                         r = vop_write_dirent(&error, uio,
 768                                              ripdata->inum &
 769                                               HAMMER2_DIRHASH_USERMSK,
 770                                              dtype,
 771                                              ripdata->name_len,
 772                                              ripdata->filename);
 773                         if (r)
 774                                 break;
 775                         if (cookies)
 776                                 cookies[cookie_index] = saveoff;
 777                         ++cookie_index;
 778                 } else {
 779                         /* XXX chain error */
 780                         kprintf("bad chain type readdir %d\n", bref.type);
 781                 }
 782
 783                 /*
 784                  * Keys may not be returned in order so once we have a
 785                  * placemarker (cluster) the scan must allow the full range
 786                  * or some entries will be missed.
 787                  */
 788                 cluster = hammer2_cluster_next(cparent, cluster, &key_next,
 789                                                key_next, (hammer2_key_t)-1,
 790                                                HAMMER2_LOOKUP_SHARED);
 791                 if (cluster) {
 792                         hammer2_cluster_bref(cluster, &bref);
 793                         saveoff = (bref.key & HAMMER2_DIRHASH_USERMSK) + 1;
 794                 } else {
 795                         saveoff = (hammer2_key_t)-1;
 796                 }
 797                 if (cookie_index == ncookies)
 798                         break;
 799         }
 800         if (cluster) {
 801                 hammer2_cluster_unlock(cluster);
 802                 hammer2_cluster_drop(cluster);
 803         }
 804 done:
 805         hammer2_inode_unlock(ip, cparent);
 806         if (ap->a_eofflag)
 807                 *ap->a_eofflag = (cluster == NULL);
 808         if (hammer2_debug & 0x0020)
 809                 kprintf("readdir: done at %016jx\n", saveoff);
 810         uio->uio_offset = saveoff & ~HAMMER2_DIRHASH_VISIBLE;
 811         if (error && cookie_index == 0) {
 812                 if (cookies) {
 813                         kfree(cookies, M_TEMP);
 814                         *ap->a_ncookies = 0;
 815                         *ap->a_cookies = NULL;
 816                 }
 817         } else {
 818                 if (cookies) {
 819                         *ap->a_ncookies = cookie_index;
 820                         *ap->a_cookies = cookies;
 821                 }
 822         }
 823         LOCKSTOP;
 824         return (error);
 825 }
 826
 827 /*
 828  * hammer2_vop_readlink { vp, uio, cred }
 829  */
 830 static
 831 int
 832 hammer2_vop_readlink(struct vop_readlink_args *ap)
 833 {
 834         struct vnode *vp;
 835         hammer2_inode_t *ip;
 836         int error;
 837
 838         vp = ap->a_vp;
 839         if (vp->v_type != VLNK)
 840                 return (EINVAL);
 841         ip = VTOI(vp);
 842
 843         error = hammer2_read_file(ip, ap->a_uio, 0);
 844         return (error);
 845 }
 846
 847 static
 848 int
 849 hammer2_vop_read(struct vop_read_args *ap)
 850 {
 851         struct vnode *vp;
 852         hammer2_inode_t *ip;
 853         struct uio *uio;
 854         int error;
 855         int seqcount;
 856         int bigread;
 857
 858         /*
 859          * Read operations supported on this vnode?
 860          */
 861         vp = ap->a_vp;
 862         if (vp->v_type != VREG)
 863                 return (EINVAL);
 864
 865         /*
 866          * Misc
 867          */
 868         ip = VTOI(vp);
 869         uio = ap->a_uio;
 870         error = 0;
 871
 872         seqcount = ap->a_ioflag >> 16;
 873         bigread = (uio->uio_resid > 100 * 1024 * 1024);
 874
 875         error = hammer2_read_file(ip, uio, seqcount);
 876         return (error);
 877 }
 878
 879 static
 880 int
 881 hammer2_vop_write(struct vop_write_args *ap)
 882 {
 883         hammer2_inode_t *ip;
 884         hammer2_trans_t trans;
 885         thread_t td;
 886         struct vnode *vp;
 887         struct uio *uio;
 888         int error;
 889         int seqcount;
 890         int bigwrite;
 891
 892         /*
 893          * Read operations supported on this vnode?
 894          */
 895         vp = ap->a_vp;
 896         if (vp->v_type != VREG)
 897                 return (EINVAL);
 898
 899         /*
 900          * Misc
 901          */
 902         ip = VTOI(vp);
 903         uio = ap->a_uio;
 904         error = 0;
 905         if (ip->pmp->ronly) {
 906                 return (EROFS);
 907         }
 908
 909         seqcount = ap->a_ioflag >> 16;
 910         bigwrite = (uio->uio_resid > 100 * 1024 * 1024);
 911
 912         /*
 913          * Check resource limit
 914          */
 915         if (uio->uio_resid > 0 && (td = uio->uio_td) != NULL && td->td_proc &&
 916             uio->uio_offset + uio->uio_resid >
 917              td->td_proc->p_rlimit[RLIMIT_FSIZE].rlim_cur) {
 918                 lwpsignal(td->td_proc, td->td_lwp, SIGXFSZ);
 919                 return (EFBIG);
 920         }
 921
 922         bigwrite = (uio->uio_resid > 100 * 1024 * 1024);
 923
 924         /*
 925          * The transaction interlocks against flushes initiations
 926          * (note: but will run concurrently with the actual flush).
 927          */
 928         hammer2_trans_init(&trans, ip->pmp, 0);
 929         error = hammer2_write_file(ip, uio, ap->a_ioflag, seqcount);
 930         hammer2_trans_done(&trans);
 931
 932         return (error);
 933 }
 934
 935 /*
 936  * Perform read operations on a file or symlink given an UNLOCKED
 937  * inode and uio.
 938  *
 939  * The passed ip is not locked.
 940  */
 941 static
 942 int
 943 hammer2_read_file(hammer2_inode_t *ip, struct uio *uio, int seqcount)
 944 {
 945         hammer2_off_t size;
 946         struct buf *bp;
 947         int error;
 948
 949         error = 0;
 950
 951         /*
 952          * UIO read loop.
 953          *
 954          * WARNING! Assumes that the kernel interlocks size changes at the
 955          *          vnode level.
 956          */
 957         hammer2_mtx_sh(&ip->lock);
 958         size = ip->size;
 959         hammer2_mtx_unlock(&ip->lock);
 960
 961         while (uio->uio_resid > 0 && uio->uio_offset < size) {
 962                 hammer2_key_t lbase;
 963                 hammer2_key_t leof;
 964                 int lblksize;
 965                 int loff;
 966                 int n;
 967
 968                 lblksize = hammer2_calc_logical(ip, uio->uio_offset,
 969                                                 &lbase, &leof);
 970
 971                 error = cluster_read(ip->vp, leof, lbase, lblksize,
 972                                      uio->uio_resid, seqcount * BKVASIZE,
 973                                      &bp);
 974
 975                 if (error)
 976                         break;
 977                 loff = (int)(uio->uio_offset - lbase);
 978                 n = lblksize - loff;
 979                 if (n > uio->uio_resid)
 980                         n = uio->uio_resid;
 981                 if (n > size - uio->uio_offset)
 982                         n = (int)(size - uio->uio_offset);
 983                 bp->b_flags |= B_AGE;
 984                 uiomove((char *)bp->b_data + loff, n, uio);
 985                 bqrelse(bp);
 986         }
 987         return (error);
 988 }
 989
 990 /*
 991  * Write to the file represented by the inode via the logical buffer cache.
 992  * The inode may represent a regular file or a symlink.
 993  *
 994  * The inode must not be locked.
 995  */
 996 static
 997 int
 998 hammer2_write_file(hammer2_inode_t *ip,
 999                    struct uio *uio, int ioflag, int seqcount)
1000 {
1001         hammer2_key_t old_eof;
1002         hammer2_key_t new_eof;
1003         struct buf *bp;
1004         int kflags;
1005         int error;
1006         int modified;
1007
1008         /*
1009          * Setup if append
1010          *
1011          * WARNING! Assumes that the kernel interlocks size changes at the
1012          *          vnode level.
1013          */
1014         hammer2_mtx_ex(&ip->lock);
1015         if (ioflag & IO_APPEND)
1016                 uio->uio_offset = ip->size;
1017         old_eof = ip->size;
1018         hammer2_mtx_unlock(&ip->lock);
1019
1020         /*
1021          * Extend the file if necessary.  If the write fails at some point
1022          * we will truncate it back down to cover as much as we were able
1023          * to write.
1024          *
1025          * Doing this now makes it easier to calculate buffer sizes in
1026          * the loop.
1027          */
1028         kflags = 0;
1029         error = 0;
1030         modified = 0;
1031
1032         if (uio->uio_offset + uio->uio_resid > old_eof) {
1033                 new_eof = uio->uio_offset + uio->uio_resid;
1034                 modified = 1;
1035                 hammer2_extend_file(ip, new_eof);
1036                 kflags |= NOTE_EXTEND;
1037         } else {
1038                 new_eof = old_eof;
1039         }
1040
1041         /*
1042          * UIO write loop
1043          */
1044         while (uio->uio_resid > 0) {
1045                 hammer2_key_t lbase;
1046                 int trivial;
1047                 int endofblk;
1048                 int lblksize;
1049                 int loff;
1050                 int n;
1051
1052                 /*
1053                  * Don't allow the buffer build to blow out the buffer
1054                  * cache.
1055                  */
1056                 if ((ioflag & IO_RECURSE) == 0)
1057                         bwillwrite(HAMMER2_PBUFSIZE);
1058
1059                 /*
1060                  * This nominally tells us how much we can cluster and
1061                  * what the logical buffer size needs to be.  Currently
1062                  * we don't try to cluster the write and just handle one
1063                  * block at a time.
1064                  */
1065                 lblksize = hammer2_calc_logical(ip, uio->uio_offset,
1066                                                 &lbase, NULL);
1067                 loff = (int)(uio->uio_offset - lbase);
1068
1069                 KKASSERT(lblksize <= 65536);
1070
1071                 /*
1072                  * Calculate bytes to copy this transfer and whether the
1073                  * copy completely covers the buffer or not.
1074                  */
1075                 trivial = 0;
1076                 n = lblksize - loff;
1077                 if (n > uio->uio_resid) {
1078                         n = uio->uio_resid;
1079                         if (loff == lbase && uio->uio_offset + n == new_eof)
1080                                 trivial = 1;
1081                         endofblk = 0;
1082                 } else {
1083                         if (loff == 0)
1084                                 trivial = 1;
1085                         endofblk = 1;
1086                 }
1087
1088                 /*
1089                  * Get the buffer
1090                  */
1091                 if (uio->uio_segflg == UIO_NOCOPY) {
1092                         /*
1093                          * Issuing a write with the same data backing the
1094                          * buffer.  Instantiate the buffer to collect the
1095                          * backing vm pages, then read-in any missing bits.
1096                          *
1097                          * This case is used by vop_stdputpages().
1098                          */
1099                         bp = getblk(ip->vp, lbase, lblksize, GETBLK_BHEAVY, 0);
1100                         if ((bp->b_flags & B_CACHE) == 0) {
1101                                 bqrelse(bp);
1102                                 error = bread(ip->vp, lbase, lblksize, &bp);
1103                         }
1104                 } else if (trivial) {
1105                         /*
1106                          * Even though we are entirely overwriting the buffer
1107                          * we may still have to zero it out to avoid a
1108                          * mmap/write visibility issue.
1109                          */
1110                         bp = getblk(ip->vp, lbase, lblksize, GETBLK_BHEAVY, 0);
1111                         if ((bp->b_flags & B_CACHE) == 0)
1112                                 vfs_bio_clrbuf(bp);
1113                 } else {
1114                         /*
1115                          * Partial overwrite, read in any missing bits then
1116                          * replace the portion being written.
1117                          *
1118                          * (The strategy code will detect zero-fill physical
1119                          * blocks for this case).
1120                          */
1121                         error = bread(ip->vp, lbase, lblksize, &bp);
1122                         if (error == 0)
1123                                 bheavy(bp);
1124                 }
1125
1126                 if (error) {
1127                         brelse(bp);
1128                         break;
1129                 }
1130
1131                 /*
1132                  * Ok, copy the data in
1133                  */
1134                 error = uiomove(bp->b_data + loff, n, uio);
1135                 kflags |= NOTE_WRITE;
1136                 modified = 1;
1137                 if (error) {
1138                         brelse(bp);
1139                         break;
1140                 }
1141
1142                 /*
1143                  * WARNING: Pageout daemon will issue UIO_NOCOPY writes
1144                  *          with IO_SYNC or IO_ASYNC set.  These writes
1145                  *          must be handled as the pageout daemon expects.
1146                  */
1147                 if (ioflag & IO_SYNC) {
1148                         bwrite(bp);
1149                 } else if ((ioflag & IO_DIRECT) && endofblk) {
1150                         bawrite(bp);
1151                 } else if (ioflag & IO_ASYNC) {
1152                         bawrite(bp);
1153                 } else {
1154                         bdwrite(bp);
1155                 }
1156         }
1157
1158         /*
1159          * Cleanup.  If we extended the file EOF but failed to write through
1160          * the entire write is a failure and we have to back-up.
1161          */
1162         if (error && new_eof != old_eof) {
1163                 hammer2_truncate_file(ip, old_eof);
1164         } else if (modified) {
1165                 hammer2_mtx_ex(&ip->lock);
1166                 hammer2_update_time(&ip->mtime);
1167                 atomic_set_int(&ip->flags, HAMMER2_INODE_MTIME);
1168                 hammer2_mtx_unlock(&ip->lock);
1169         }
1170         atomic_set_int(&ip->flags, HAMMER2_INODE_MODIFIED);
1171         hammer2_knote(ip->vp, kflags);
1172         vsetisdirty(ip->vp);
1173
1174         return error;
1175 }
1176
1177 /*
1178  * Truncate the size of a file.  The inode must not be locked.
1179  *
1180  * NOTE:    Caller handles setting HAMMER2_INODE_MODIFIED
1181  *
1182  * WARNING: nvtruncbuf() can only be safely called without the inode lock
1183  *          held due to the way our write thread works.
1184  *
1185  * WARNING! Assumes that the kernel interlocks size changes at the
1186  *          vnode level.
1187  */
1188 static
1189 void
1190 hammer2_truncate_file(hammer2_inode_t *ip, hammer2_key_t nsize)
1191 {
1192         hammer2_key_t lbase;
1193         int nblksize;
1194
1195         LOCKSTART;
1196         if (ip->vp) {
1197                 nblksize = hammer2_calc_logical(ip, nsize, &lbase, NULL);
1198                 nvtruncbuf(ip->vp, nsize,
1199                            nblksize, (int)nsize & (nblksize - 1),
1200                            0);
1201         }
1202         hammer2_mtx_ex(&ip->lock);
1203         ip->size = nsize;
1204         atomic_set_int(&ip->flags, HAMMER2_INODE_RESIZED);
1205         hammer2_mtx_unlock(&ip->lock);
1206         LOCKSTOP;
1207 }
1208
1209 /*
1210  * Extend the size of a file.  The inode must not be locked.
1211  *
1212  * WARNING! Assumes that the kernel interlocks size changes at the
1213  *          vnode level.
1214  *
1215  * NOTE: Caller handles setting HAMMER2_INODE_MODIFIED
1216  */
1217 static
1218 void
1219 hammer2_extend_file(hammer2_inode_t *ip, hammer2_key_t nsize)
1220 {
1221         hammer2_key_t lbase;
1222         hammer2_key_t osize;
1223         int oblksize;
1224         int nblksize;
1225
1226         LOCKSTART;
1227         hammer2_mtx_ex(&ip->lock);
1228         osize = ip->size;
1229         ip->size = nsize;
1230         hammer2_mtx_unlock(&ip->lock);
1231
1232         if (ip->vp) {
1233                 oblksize = hammer2_calc_logical(ip, osize, &lbase, NULL);
1234                 nblksize = hammer2_calc_logical(ip, nsize, &lbase, NULL);
1235                 nvextendbuf(ip->vp,
1236                             osize, nsize,
1237                             oblksize, nblksize,
1238                             -1, -1, 0);
1239         }
1240         atomic_set_int(&ip->flags, HAMMER2_INODE_RESIZED);
1241         LOCKSTOP;
1242 }
1243
1244 static
1245 int
1246 hammer2_vop_nresolve(struct vop_nresolve_args *ap)
1247 {
1248         hammer2_inode_t *ip;
1249         hammer2_inode_t *dip;
1250         hammer2_cluster_t *cparent;
1251         hammer2_cluster_t *cluster;
1252         const hammer2_inode_data_t *ripdata;
1253         hammer2_key_t key_next;
1254         hammer2_key_t lhc;
1255         struct namecache *ncp;
1256         const uint8_t *name;
1257         size_t name_len;
1258         int error = 0;
1259         struct vnode *vp;
1260
1261         LOCKSTART;
1262         dip = VTOI(ap->a_dvp);
1263         ncp = ap->a_nch->ncp;
1264         name = ncp->nc_name;
1265         name_len = ncp->nc_nlen;
1266         lhc = hammer2_dirhash(name, name_len);
1267
1268         /*
1269          * Note: In DragonFly the kernel handles '.' and '..'.
1270          */
1271         cparent = hammer2_inode_lock(dip, HAMMER2_RESOLVE_ALWAYS |
1272                                           HAMMER2_RESOLVE_SHARED);
1273
1274         cluster = hammer2_cluster_lookup(cparent, &key_next,
1275                                          lhc, lhc + HAMMER2_DIRHASH_LOMASK,
1276                                          HAMMER2_LOOKUP_SHARED);
1277         while (cluster) {
1278                 if (hammer2_cluster_type(cluster) == HAMMER2_BREF_TYPE_INODE) {
1279                         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
1280                         if (ripdata->name_len == name_len &&
1281                             bcmp(ripdata->filename, name, name_len) == 0) {
1282                                 break;
1283                         }
1284                 }
1285                 cluster = hammer2_cluster_next(cparent, cluster, &key_next,
1286                                                key_next,
1287                                                lhc + HAMMER2_DIRHASH_LOMASK,
1288                                                HAMMER2_LOOKUP_SHARED);
1289         }
1290         hammer2_inode_unlock(dip, cparent);
1291
1292         /*
1293          * Resolve hardlink entries before acquiring the inode.
1294          */
1295         if (cluster) {
1296                 ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
1297                 if (ripdata->type == HAMMER2_OBJTYPE_HARDLINK) {
1298                         hammer2_tid_t inum = ripdata->inum;
1299                         error = hammer2_hardlink_find(dip, NULL, &cluster);
1300                         if (error) {
1301                                 kprintf("hammer2: unable to find hardlink "
1302                                         "0x%016jx\n", inum);
1303                                 LOCKSTOP;
1304
1305                                 return error;
1306                         }
1307                 }
1308         }
1309
1310         /*
1311          * nresolve needs to resolve hardlinks, the original cluster is not
1312          * sufficient.
1313          */
1314         if (cluster) {
1315                 ip = hammer2_inode_get(dip->pmp, dip, cluster);
1316                 ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
1317                 if (ripdata->type == HAMMER2_OBJTYPE_HARDLINK) {
1318                         kprintf("nresolve: fixup hardlink\n");
1319                         hammer2_inode_ref(ip);
1320                         hammer2_inode_unlock(ip, NULL);
1321                         hammer2_cluster_unlock(cluster);
1322                         hammer2_cluster_drop(cluster);
1323                         cluster = hammer2_inode_lock(ip,
1324                                                      HAMMER2_RESOLVE_ALWAYS);
1325                         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
1326                         hammer2_inode_drop(ip);
1327                         kprintf("nresolve: fixup to type %02x\n",
1328                                 ripdata->type);
1329                 }
1330         } else {
1331                 ip = NULL;
1332         }
1333
1334 #if 0
1335         /*
1336          * Deconsolidate any hardlink whos nlinks == 1.  Ignore errors.
1337          * If an error occurs chain and ip are left alone.
1338          *
1339          * XXX upgrade shared lock?
1340          */
1341         if (ochain && chain &&
1342             chain->data->ipdata.nlinks == 1 && !dip->pmp->ronly) {
1343                 kprintf("hammer2: need to unconsolidate hardlink for %s\n",
1344                         chain->data->ipdata.filename);
1345                 /* XXX retain shared lock on dip? (currently not held) */
1346                 hammer2_trans_init(&trans, dip->pmp, 0);
1347                 hammer2_hardlink_deconsolidate(&trans, dip, &chain, &ochain);
1348                 hammer2_trans_done(&trans);
1349         }
1350 #endif
1351
1352         /*
1353          * Acquire the related vnode
1354          *
1355          * NOTE: For error processing, only ENOENT resolves the namecache
1356          *       entry to NULL, otherwise we just return the error and
1357          *       leave the namecache unresolved.
1358          *
1359          * NOTE: multiple hammer2_inode structures can be aliased to the
1360          *       same chain element, for example for hardlinks.  This
1361          *       use case does not 'reattach' inode associations that
1362          *       might already exist, but always allocates a new one.
1363          *
1364          * WARNING: inode structure is locked exclusively via inode_get
1365          *          but chain was locked shared.  inode_unlock()
1366          *          will handle it properly.
1367          */
1368         if (cluster) {
1369                 vp = hammer2_igetv(ip, cluster, &error);
1370                 if (error == 0) {
1371                         vn_unlock(vp);
1372                         cache_setvp(ap->a_nch, vp);
1373                 } else if (error == ENOENT) {
1374                         cache_setvp(ap->a_nch, NULL);
1375                 }
1376                 hammer2_inode_unlock(ip, cluster);
1377
1378                 /*
1379                  * The vp should not be released until after we've disposed
1380                  * of our locks, because it might cause vop_inactive() to
1381                  * be called.
1382                  */
1383                 if (vp)
1384                         vrele(vp);
1385         } else {
1386                 error = ENOENT;
1387                 cache_setvp(ap->a_nch, NULL);
1388         }
1389         KASSERT(error || ap->a_nch->ncp->nc_vp != NULL,
1390                 ("resolve error %d/%p ap %p\n",
1391                  error, ap->a_nch->ncp->nc_vp, ap));
1392         LOCKSTOP;
1393         return error;
1394 }
1395
1396 static
1397 int
1398 hammer2_vop_nlookupdotdot(struct vop_nlookupdotdot_args *ap)
1399 {
1400         hammer2_inode_t *dip;
1401         hammer2_inode_t *ip;
1402         hammer2_cluster_t *cparent;
1403         int error;
1404
1405         LOCKSTART;
1406         dip = VTOI(ap->a_dvp);
1407
1408         if ((ip = dip->pip) == NULL) {
1409                 *ap->a_vpp = NULL;
1410                 LOCKSTOP;
1411                 return ENOENT;
1412         }
1413         cparent = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS);
1414         *ap->a_vpp = hammer2_igetv(ip, cparent, &error);
1415         hammer2_inode_unlock(ip, cparent);
1416
1417         LOCKSTOP;
1418         return error;
1419 }
1420
1421 static
1422 int
1423 hammer2_vop_nmkdir(struct vop_nmkdir_args *ap)
1424 {
1425         hammer2_inode_t *dip;
1426         hammer2_inode_t *nip;
1427         hammer2_trans_t trans;
1428         hammer2_cluster_t *cluster;
1429         struct namecache *ncp;
1430         const uint8_t *name;
1431         size_t name_len;
1432         int error;
1433
1434         LOCKSTART;
1435         dip = VTOI(ap->a_dvp);
1436         if (dip->pmp->ronly) {
1437                 LOCKSTOP;
1438                 return (EROFS);
1439         }
1440
1441         ncp = ap->a_nch->ncp;
1442         name = ncp->nc_name;
1443         name_len = ncp->nc_nlen;
1444         cluster = NULL;
1445
1446         hammer2_pfs_memory_wait(dip->pmp);
1447         hammer2_trans_init(&trans, dip->pmp, HAMMER2_TRANS_NEWINODE);
1448         nip = hammer2_inode_create(&trans, dip, ap->a_vap, ap->a_cred,
1449                                    name, name_len,
1450                                    &cluster, 0, &error);
1451         if (error) {
1452                 KKASSERT(nip == NULL);
1453                 *ap->a_vpp = NULL;
1454         } else {
1455                 *ap->a_vpp = hammer2_igetv(nip, cluster, &error);
1456                 hammer2_inode_unlock(nip, cluster);
1457         }
1458         hammer2_trans_done(&trans);
1459
1460         if (error == 0) {
1461                 cache_setunresolved(ap->a_nch);
1462                 cache_setvp(ap->a_nch, *ap->a_vpp);
1463         }
1464         LOCKSTOP;
1465         return error;
1466 }
1467
1468 /*
1469  * Return the largest contiguous physical disk range for the logical
1470  * request, in bytes.
1471  *
1472  * (struct vnode *vp, off_t loffset, off_t *doffsetp, int *runp, int *runb)
1473  *
1474  * Basically disabled, the logical buffer write thread has to deal with
1475  * buffers one-at-a-time.
1476  */
1477 static
1478 int
1479 hammer2_vop_bmap(struct vop_bmap_args *ap)
1480 {
1481         *ap->a_doffsetp = NOOFFSET;
1482         if (ap->a_runp)
1483                 *ap->a_runp = 0;
1484         if (ap->a_runb)
1485                 *ap->a_runb = 0;
1486         return (EOPNOTSUPP);
1487 }
1488
1489 static
1490 int
1491 hammer2_vop_open(struct vop_open_args *ap)
1492 {
1493         return vop_stdopen(ap);
1494 }
1495
1496 /*
1497  * hammer2_vop_advlock { vp, id, op, fl, flags }
1498  */
1499 static
1500 int
1501 hammer2_vop_advlock(struct vop_advlock_args *ap)
1502 {
1503         hammer2_inode_t *ip = VTOI(ap->a_vp);
1504         const hammer2_inode_data_t *ripdata;
1505         hammer2_cluster_t *cparent;
1506         hammer2_off_t size;
1507
1508         cparent = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS |
1509                                          HAMMER2_RESOLVE_SHARED);
1510         ripdata = &hammer2_cluster_rdata(cparent)->ipdata;
1511         size = ripdata->size;
1512         hammer2_inode_unlock(ip, cparent);
1513         return (lf_advlock(ap, &ip->advlock, size));
1514 }
1515
1516
1517 static
1518 int
1519 hammer2_vop_close(struct vop_close_args *ap)
1520 {
1521         return vop_stdclose(ap);
1522 }
1523
1524 /*
1525  * hammer2_vop_nlink { nch, dvp, vp, cred }
1526  *
1527  * Create a hardlink from (vp) to {dvp, nch}.
1528  */
1529 static
1530 int
1531 hammer2_vop_nlink(struct vop_nlink_args *ap)
1532 {
1533         hammer2_inode_t *fdip;  /* target directory to create link in */
1534         hammer2_inode_t *tdip;  /* target directory to create link in */
1535         hammer2_inode_t *cdip;  /* common parent directory */
1536         hammer2_inode_t *ip;    /* inode we are hardlinking to */
1537         hammer2_cluster_t *cluster;
1538         hammer2_cluster_t *fdcluster;
1539         hammer2_cluster_t *tdcluster;
1540         hammer2_cluster_t *cdcluster;
1541         hammer2_trans_t trans;
1542         struct namecache *ncp;
1543         const uint8_t *name;
1544         size_t name_len;
1545         int error;
1546
1547         LOCKSTART;
1548         tdip = VTOI(ap->a_dvp);
1549         if (tdip->pmp->ronly) {
1550                 LOCKSTOP;
1551                 return (EROFS);
1552         }
1553
1554         ncp = ap->a_nch->ncp;
1555         name = ncp->nc_name;
1556         name_len = ncp->nc_nlen;
1557
1558         /*
1559          * ip represents the file being hardlinked.  The file could be a
1560          * normal file or a hardlink target if it has already been hardlinked.
1561          * If ip is a hardlinked target then ip->pip represents the location
1562          * of the hardlinked target, NOT the location of the hardlink pointer.
1563          *
1564          * Bump nlinks and potentially also create or move the hardlink
1565          * target in the parent directory common to (ip) and (tdip).  The
1566          * consolidation code can modify ip->cluster and ip->pip.  The
1567          * returned cluster is locked.
1568          */
1569         ip = VTOI(ap->a_vp);
1570         hammer2_pfs_memory_wait(ip->pmp);
1571         hammer2_trans_init(&trans, ip->pmp, HAMMER2_TRANS_NEWINODE);
1572
1573         /*
1574          * The common parent directory must be locked first to avoid deadlocks.
1575          * Also note that fdip and/or tdip might match cdip.
1576          */
1577         fdip = ip->pip;
1578         cdip = hammer2_inode_common_parent(fdip, tdip);
1579         cdcluster = hammer2_inode_lock(cdip, HAMMER2_RESOLVE_ALWAYS);
1580         fdcluster = hammer2_inode_lock(fdip, HAMMER2_RESOLVE_ALWAYS);
1581         tdcluster = hammer2_inode_lock(tdip, HAMMER2_RESOLVE_ALWAYS);
1582         cluster = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS);
1583         error = hammer2_hardlink_consolidate(&trans, ip, &cluster,
1584                                              cdip, cdcluster, 1);
1585         if (error)
1586                 goto done;
1587
1588         /*
1589          * Create a directory entry connected to the specified cluster.
1590          *
1591          * WARNING! chain can get moved by the connect (indirectly due to
1592          *          potential indirect block creation).
1593          */
1594         error = hammer2_inode_connect(&trans, &cluster, 1,
1595                                       tdip, tdcluster,
1596                                       name, name_len, 0);
1597         if (error == 0) {
1598                 cache_setunresolved(ap->a_nch);
1599                 cache_setvp(ap->a_nch, ap->a_vp);
1600         }
1601 done:
1602         hammer2_inode_unlock(ip, cluster);
1603         hammer2_inode_unlock(tdip, tdcluster);
1604         hammer2_inode_unlock(fdip, fdcluster);
1605         hammer2_inode_unlock(cdip, cdcluster);
1606         hammer2_inode_drop(cdip);
1607         hammer2_trans_done(&trans);
1608
1609         LOCKSTOP;
1610         return error;
1611 }
1612
1613 /*
1614  * hammer2_vop_ncreate { nch, dvp, vpp, cred, vap }
1615  *
1616  * The operating system has already ensured that the directory entry
1617  * does not exist and done all appropriate namespace locking.
1618  */
1619 static
1620 int
1621 hammer2_vop_ncreate(struct vop_ncreate_args *ap)
1622 {
1623         hammer2_inode_t *dip;
1624         hammer2_inode_t *nip;
1625         hammer2_trans_t trans;
1626         hammer2_cluster_t *ncluster;
1627         struct namecache *ncp;
1628         const uint8_t *name;
1629         size_t name_len;
1630         int error;
1631
1632         LOCKSTART;
1633         dip = VTOI(ap->a_dvp);
1634         if (dip->pmp->ronly) {
1635                 LOCKSTOP;
1636                 return (EROFS);
1637         }
1638
1639         ncp = ap->a_nch->ncp;
1640         name = ncp->nc_name;
1641         name_len = ncp->nc_nlen;
1642         hammer2_pfs_memory_wait(dip->pmp);
1643         hammer2_trans_init(&trans, dip->pmp, HAMMER2_TRANS_NEWINODE);
1644         ncluster = NULL;
1645
1646         nip = hammer2_inode_create(&trans, dip, ap->a_vap, ap->a_cred,
1647                                    name, name_len,
1648                                    &ncluster, 0, &error);
1649         if (error) {
1650                 KKASSERT(nip == NULL);
1651                 *ap->a_vpp = NULL;
1652         } else {
1653                 *ap->a_vpp = hammer2_igetv(nip, ncluster, &error);
1654                 hammer2_inode_unlock(nip, ncluster);
1655         }
1656         hammer2_trans_done(&trans);
1657
1658         if (error == 0) {
1659                 cache_setunresolved(ap->a_nch);
1660                 cache_setvp(ap->a_nch, *ap->a_vpp);
1661         }
1662         LOCKSTOP;
1663         return error;
1664 }
1665
1666 /*
1667  * Make a device node (typically a fifo)
1668  */
1669 static
1670 int
1671 hammer2_vop_nmknod(struct vop_nmknod_args *ap)
1672 {
1673         hammer2_inode_t *dip;
1674         hammer2_inode_t *nip;
1675         hammer2_trans_t trans;
1676         hammer2_cluster_t *ncluster;
1677         struct namecache *ncp;
1678         const uint8_t *name;
1679         size_t name_len;
1680         int error;
1681
1682         LOCKSTART;
1683         dip = VTOI(ap->a_dvp);
1684         if (dip->pmp->ronly) {
1685                 LOCKSTOP;
1686                 return (EROFS);
1687         }
1688
1689         ncp = ap->a_nch->ncp;
1690         name = ncp->nc_name;
1691         name_len = ncp->nc_nlen;
1692         hammer2_pfs_memory_wait(dip->pmp);
1693         hammer2_trans_init(&trans, dip->pmp, HAMMER2_TRANS_NEWINODE);
1694         ncluster = NULL;
1695
1696         nip = hammer2_inode_create(&trans, dip, ap->a_vap, ap->a_cred,
1697                                    name, name_len,
1698                                    &ncluster, 0, &error);
1699         if (error) {
1700                 KKASSERT(nip == NULL);
1701                 *ap->a_vpp = NULL;
1702         } else {
1703                 *ap->a_vpp = hammer2_igetv(nip, ncluster, &error);
1704                 hammer2_inode_unlock(nip, ncluster);
1705         }
1706         hammer2_trans_done(&trans);
1707
1708         if (error == 0) {
1709                 cache_setunresolved(ap->a_nch);
1710                 cache_setvp(ap->a_nch, *ap->a_vpp);
1711         }
1712         LOCKSTOP;
1713         return error;
1714 }
1715
1716 /*
1717  * hammer2_vop_nsymlink { nch, dvp, vpp, cred, vap, target }
1718  */
1719 static
1720 int
1721 hammer2_vop_nsymlink(struct vop_nsymlink_args *ap)
1722 {
1723         hammer2_inode_t *dip;
1724         hammer2_inode_t *nip;
1725         hammer2_cluster_t *ncparent;
1726         hammer2_trans_t trans;
1727         struct namecache *ncp;
1728         const uint8_t *name;
1729         size_t name_len;
1730         int error;
1731
1732         dip = VTOI(ap->a_dvp);
1733         if (dip->pmp->ronly)
1734                 return (EROFS);
1735
1736         ncp = ap->a_nch->ncp;
1737         name = ncp->nc_name;
1738         name_len = ncp->nc_nlen;
1739         hammer2_pfs_memory_wait(dip->pmp);
1740         hammer2_trans_init(&trans, dip->pmp, HAMMER2_TRANS_NEWINODE);
1741         ncparent = NULL;
1742
1743         ap->a_vap->va_type = VLNK;      /* enforce type */
1744
1745         nip = hammer2_inode_create(&trans, dip, ap->a_vap, ap->a_cred,
1746                                    name, name_len,
1747                                    &ncparent, 0, &error);
1748         if (error) {
1749                 KKASSERT(nip == NULL);
1750                 *ap->a_vpp = NULL;
1751                 hammer2_trans_done(&trans);
1752                 return error;
1753         }
1754         *ap->a_vpp = hammer2_igetv(nip, ncparent, &error);
1755
1756         /*
1757          * Build the softlink (~like file data) and finalize the namecache.
1758          */
1759         if (error == 0) {
1760                 size_t bytes;
1761                 struct uio auio;
1762                 struct iovec aiov;
1763                 hammer2_inode_data_t *nipdata;
1764
1765                 nipdata = &hammer2_cluster_wdata(ncparent)->ipdata;
1766                 /* nipdata = &nip->chain->data->ipdata;XXX */
1767                 bytes = strlen(ap->a_target);
1768
1769                 if (bytes <= HAMMER2_EMBEDDED_BYTES) {
1770                         KKASSERT(nipdata->op_flags &
1771                                  HAMMER2_OPFLAG_DIRECTDATA);
1772                         bcopy(ap->a_target, nipdata->u.data, bytes);
1773                         nipdata->size = bytes;
1774                         nip->size = bytes;
1775                         hammer2_cluster_modsync(ncparent);
1776                         hammer2_inode_unlock(nip, ncparent);
1777                         /* nipdata = NULL; not needed */
1778                 } else {
1779                         hammer2_inode_unlock(nip, ncparent);
1780                         /* nipdata = NULL; not needed */
1781                         bzero(&auio, sizeof(auio));
1782                         bzero(&aiov, sizeof(aiov));
1783                         auio.uio_iov = &aiov;
1784                         auio.uio_segflg = UIO_SYSSPACE;
1785                         auio.uio_rw = UIO_WRITE;
1786                         auio.uio_resid = bytes;
1787                         auio.uio_iovcnt = 1;
1788                         auio.uio_td = curthread;
1789                         aiov.iov_base = ap->a_target;
1790                         aiov.iov_len = bytes;
1791                         error = hammer2_write_file(nip, &auio, IO_APPEND, 0);
1792                         /* XXX handle error */
1793                         error = 0;
1794                 }
1795         } else {
1796                 hammer2_inode_unlock(nip, ncparent);
1797         }
1798         hammer2_trans_done(&trans);
1799
1800         /*
1801          * Finalize namecache
1802          */
1803         if (error == 0) {
1804                 cache_setunresolved(ap->a_nch);
1805                 cache_setvp(ap->a_nch, *ap->a_vpp);
1806                 /* hammer2_knote(ap->a_dvp, NOTE_WRITE); */
1807         }
1808         return error;
1809 }
1810
1811 /*
1812  * hammer2_vop_nremove { nch, dvp, cred }
1813  */
1814 static
1815 int
1816 hammer2_vop_nremove(struct vop_nremove_args *ap)
1817 {
1818         hammer2_inode_t *dip;
1819         hammer2_trans_t trans;
1820         struct namecache *ncp;
1821         const uint8_t *name;
1822         size_t name_len;
1823         int error;
1824
1825         LOCKSTART;
1826         dip = VTOI(ap->a_dvp);
1827         if (dip->pmp->ronly) {
1828                 LOCKSTOP;
1829                 return(EROFS);
1830         }
1831
1832         ncp = ap->a_nch->ncp;
1833         name = ncp->nc_name;
1834         name_len = ncp->nc_nlen;
1835
1836         hammer2_pfs_memory_wait(dip->pmp);
1837         hammer2_trans_init(&trans, dip->pmp, 0);
1838         error = hammer2_unlink_file(&trans, dip, name, name_len,
1839                                     0, NULL, ap->a_nch, -1);
1840         hammer2_run_unlinkq(&trans, dip->pmp);
1841         hammer2_trans_done(&trans);
1842         if (error == 0)
1843                 cache_unlink(ap->a_nch);
1844         LOCKSTOP;
1845         return (error);
1846 }
1847
1848 /*
1849  * hammer2_vop_nrmdir { nch, dvp, cred }
1850  */
1851 static
1852 int
1853 hammer2_vop_nrmdir(struct vop_nrmdir_args *ap)
1854 {
1855         hammer2_inode_t *dip;
1856         hammer2_trans_t trans;
1857         struct namecache *ncp;
1858         const uint8_t *name;
1859         size_t name_len;
1860         int error;
1861
1862         LOCKSTART;
1863         dip = VTOI(ap->a_dvp);
1864         if (dip->pmp->ronly) {
1865                 LOCKSTOP;
1866                 return(EROFS);
1867         }
1868
1869         ncp = ap->a_nch->ncp;
1870         name = ncp->nc_name;
1871         name_len = ncp->nc_nlen;
1872
1873         hammer2_pfs_memory_wait(dip->pmp);
1874         hammer2_trans_init(&trans, dip->pmp, 0);
1875         hammer2_run_unlinkq(&trans, dip->pmp);
1876         error = hammer2_unlink_file(&trans, dip, name, name_len,
1877                                     1, NULL, ap->a_nch, -1);
1878         hammer2_trans_done(&trans);
1879         if (error == 0)
1880                 cache_unlink(ap->a_nch);
1881         LOCKSTOP;
1882         return (error);
1883 }
1884
1885 /*
1886  * hammer2_vop_nrename { fnch, tnch, fdvp, tdvp, cred }
1887  */
1888 static
1889 int
1890 hammer2_vop_nrename(struct vop_nrename_args *ap)
1891 {
1892         struct namecache *fncp;
1893         struct namecache *tncp;
1894         hammer2_inode_t *cdip;
1895         hammer2_inode_t *fdip;
1896         hammer2_inode_t *tdip;
1897         hammer2_inode_t *ip;
1898         hammer2_cluster_t *cluster;
1899         hammer2_cluster_t *fdcluster;
1900         hammer2_cluster_t *tdcluster;
1901         hammer2_cluster_t *cdcluster;
1902         hammer2_trans_t trans;
1903         const uint8_t *fname;
1904         size_t fname_len;
1905         const uint8_t *tname;
1906         size_t tname_len;
1907         int error;
1908         int tnch_error;
1909         int hlink;
1910
1911         if (ap->a_fdvp->v_mount != ap->a_tdvp->v_mount)
1912                 return(EXDEV);
1913         if (ap->a_fdvp->v_mount != ap->a_fnch->ncp->nc_vp->v_mount)
1914                 return(EXDEV);
1915
1916         fdip = VTOI(ap->a_fdvp);        /* source directory */
1917         tdip = VTOI(ap->a_tdvp);        /* target directory */
1918
1919         if (fdip->pmp->ronly)
1920                 return(EROFS);
1921
1922         LOCKSTART;
1923         fncp = ap->a_fnch->ncp;         /* entry name in source */
1924         fname = fncp->nc_name;
1925         fname_len = fncp->nc_nlen;
1926
1927         tncp = ap->a_tnch->ncp;         /* entry name in target */
1928         tname = tncp->nc_name;
1929         tname_len = tncp->nc_nlen;
1930
1931         hammer2_pfs_memory_wait(tdip->pmp);
1932         hammer2_trans_init(&trans, tdip->pmp, 0);
1933
1934         /*
1935          * ip is the inode being renamed.  If this is a hardlink then
1936          * ip represents the actual file and not the hardlink marker.
1937          */
1938         ip = VTOI(fncp->nc_vp);
1939         cluster = NULL;
1940
1941
1942         /*
1943          * The common parent directory must be locked first to avoid deadlocks.
1944          * Also note that fdip and/or tdip might match cdip.
1945          *
1946          * WARNING! fdip may not match ip->pip.  That is, if the source file
1947          *          is already a hardlink then what we are renaming is the
1948          *          hardlink pointer, not the hardlink itself.  The hardlink
1949          *          directory (ip->pip) will already be at a common parent
1950          *          of fdrip.
1951          *
1952          *          Be sure to use ip->pip when finding the common parent
1953          *          against tdip or we might accidently move the hardlink
1954          *          target into a subdirectory that makes it inaccessible to
1955          *          other pointers.
1956          */
1957         cdip = hammer2_inode_common_parent(ip->pip, tdip);
1958         cdcluster = hammer2_inode_lock(cdip, HAMMER2_RESOLVE_ALWAYS);
1959         fdcluster = hammer2_inode_lock(fdip, HAMMER2_RESOLVE_ALWAYS);
1960         tdcluster = hammer2_inode_lock(tdip, HAMMER2_RESOLVE_ALWAYS);
1961
1962         /*
1963          * Keep a tight grip on the inode so the temporary unlinking from
1964          * the source location prior to linking to the target location
1965          * does not cause the cluster to be destroyed.
1966          *
1967          * NOTE: To avoid deadlocks we cannot lock (ip) while we are
1968          *       unlinking elements from their directories.  Locking
1969          *       the nlinks field does not lock the whole inode.
1970          */
1971         hammer2_inode_ref(ip);
1972
1973         /*
1974          * Remove target if it exists.
1975          */
1976         error = hammer2_unlink_file(&trans, tdip, tname, tname_len,
1977                                     -1, NULL, ap->a_tnch, -1);
1978         tnch_error = error;
1979         if (error && error != ENOENT)
1980                 goto done;
1981
1982         /*
1983          * When renaming a hardlinked file we may have to re-consolidate
1984          * the location of the hardlink target.
1985          *
1986          * If ip represents a regular file the consolidation code essentially
1987          * does nothing other than return the same locked cluster that was
1988          * passed in.
1989          *
1990          * The returned cluster will be locked.
1991          *
1992          * WARNING!  We do not currently have a local copy of ipdata but
1993          *           we do use one later remember that it must be reloaded
1994          *           on any modification to the inode, including connects.
1995          */
1996         cluster = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS);
1997         error = hammer2_hardlink_consolidate(&trans, ip, &cluster,
1998                                              cdip, cdcluster, 0);
1999         if (error)
2000                 goto done;
2001
2002         /*
2003          * Disconnect (fdip, fname) from the source directory.  This will
2004          * disconnect (ip) if it represents a direct file.  If (ip) represents
2005          * a hardlink the HARDLINK pointer object will be removed but the
2006          * hardlink will stay intact.
2007          *
2008          * Always pass nch as NULL because we intend to reconnect the inode,
2009          * so we don't want hammer2_unlink_file() to rename it to the hidden
2010          * open-but-unlinked directory.
2011          *
2012          * The target cluster may be marked DELETED but will not be destroyed
2013          * since we retain our hold on ip and cluster.
2014          *
2015          * NOTE: We pass nlinks as 0 (not -1) in order to retain the file's
2016          *       link count.
2017          */
2018         error = hammer2_unlink_file(&trans, fdip, fname, fname_len,
2019                                     -1, &hlink, NULL, 0);
2020         KKASSERT(error != EAGAIN);
2021         if (error)
2022                 goto done;
2023
2024         /*
2025          * Reconnect ip to target directory using cluster.  Chains cannot
2026          * actually be moved, so this will duplicate the cluster in the new
2027          * spot and assign it to the ip, replacing the old cluster.
2028          *
2029          * WARNING: Because recursive locks are allowed and we unlinked the
2030          *          file that we have a cluster-in-hand for just above, the
2031          *          cluster might have been delete-duplicated.  We must
2032          *          refactor the cluster.
2033          *
2034          * WARNING: Chain locks can lock buffer cache buffers, to avoid
2035          *          deadlocks we want to unlock before issuing a cache_*()
2036          *          op (that might have to lock a vnode).
2037          *
2038          * NOTE:    Pass nlinks as 0 because we retained the link count from
2039          *          the unlink, so we do not have to modify it.
2040          */
2041         error = hammer2_inode_connect(&trans, &cluster, hlink,
2042                                       tdip, tdcluster,
2043                                       tname, tname_len, 0);
2044         if (error == 0) {
2045                 KKASSERT(cluster != NULL);
2046                 hammer2_inode_repoint(ip, (hlink ? ip->pip : tdip), cluster);
2047         }
2048 done:
2049         hammer2_inode_unlock(ip, cluster);
2050         hammer2_inode_unlock(tdip, tdcluster);
2051         hammer2_inode_unlock(fdip, fdcluster);
2052         hammer2_inode_unlock(cdip, cdcluster);
2053         hammer2_inode_drop(ip);
2054         hammer2_inode_drop(cdip);
2055         hammer2_run_unlinkq(&trans, fdip->pmp);
2056         hammer2_trans_done(&trans);
2057
2058         /*
2059          * Issue the namecache update after unlocking all the internal
2060          * hammer structures, otherwise we might deadlock.
2061          */
2062         if (tnch_error == 0) {
2063                 cache_unlink(ap->a_tnch);
2064                 cache_setunresolved(ap->a_tnch);
2065         }
2066         if (error == 0)
2067                 cache_rename(ap->a_fnch, ap->a_tnch);
2068
2069         LOCKSTOP;
2070         return (error);
2071 }
2072
2073 /*
2074  * Strategy code (async logical file buffer I/O from system)
2075  *
2076  * WARNING: The strategy code cannot safely use hammer2 transactions
2077  *          as this can deadlock against vfs_sync's vfsync() call
2078  *          if multiple flushes are queued.  All H2 structures must
2079  *          already be present and ready for the DIO.
2080  *
2081  *          Reads can be initiated asynchronously, writes have to be
2082  *          spooled to a separate thread for action to avoid deadlocks.
2083  */
2084 static int hammer2_strategy_read(struct vop_strategy_args *ap);
2085 static int hammer2_strategy_write(struct vop_strategy_args *ap);
2086 static void hammer2_strategy_read_callback(hammer2_iocb_t *iocb);
2087
2088 static
2089 int
2090 hammer2_vop_strategy(struct vop_strategy_args *ap)
2091 {
2092         struct bio *biop;
2093         struct buf *bp;
2094         int error;
2095
2096         biop = ap->a_bio;
2097         bp = biop->bio_buf;
2098
2099         switch(bp->b_cmd) {
2100         case BUF_CMD_READ:
2101                 error = hammer2_strategy_read(ap);
2102                 ++hammer2_iod_file_read;
2103                 break;
2104         case BUF_CMD_WRITE:
2105                 error = hammer2_strategy_write(ap);
2106                 ++hammer2_iod_file_write;
2107                 break;
2108         default:
2109                 bp->b_error = error = EINVAL;
2110                 bp->b_flags |= B_ERROR;
2111                 biodone(biop);
2112                 break;
2113         }
2114         return (error);
2115 }
2116
2117 /*
2118  * Logical buffer I/O, async read.
2119  */
2120 static
2121 int
2122 hammer2_strategy_read(struct vop_strategy_args *ap)
2123 {
2124         struct buf *bp;
2125         struct bio *bio;
2126         struct bio *nbio;
2127         hammer2_inode_t *ip;
2128         hammer2_cluster_t *cparent;
2129         hammer2_cluster_t *cluster;
2130         hammer2_key_t key_dummy;
2131         hammer2_key_t lbase;
2132         uint8_t btype;
2133
2134         bio = ap->a_bio;
2135         bp = bio->bio_buf;
2136         ip = VTOI(ap->a_vp);
2137         nbio = push_bio(bio);
2138
2139         lbase = bio->bio_offset;
2140         KKASSERT(((int)lbase & HAMMER2_PBUFMASK) == 0);
2141
2142         /*
2143          * Lookup the file offset.
2144          */
2145         cparent = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS |
2146                                          HAMMER2_RESOLVE_SHARED);
2147         cluster = hammer2_cluster_lookup(cparent, &key_dummy,
2148                                        lbase, lbase,
2149                                        HAMMER2_LOOKUP_NODATA |
2150                                        HAMMER2_LOOKUP_SHARED);
2151         hammer2_inode_unlock(ip, cparent);
2152
2153         /*
2154          * Data is zero-fill if no cluster could be found
2155          * (XXX or EIO on a cluster failure).
2156          */
2157         if (cluster == NULL) {
2158                 bp->b_resid = 0;
2159                 bp->b_error = 0;
2160                 bzero(bp->b_data, bp->b_bcount);
2161                 biodone(nbio);
2162                 return(0);
2163         }
2164
2165         /*
2166          * Cluster elements must be type INODE or type DATA, but the
2167          * compression mode (or not) for DATA chains can be different for
2168          * each chain.  This will be handled by the callback.
2169          *
2170          * If the cluster already has valid data the callback will be made
2171          * immediately/synchronously.
2172          */
2173         btype = hammer2_cluster_type(cluster);
2174         if (btype != HAMMER2_BREF_TYPE_INODE &&
2175             btype != HAMMER2_BREF_TYPE_DATA) {
2176                 panic("READ PATH: hammer2_strategy_read: unknown bref type");
2177         }
2178         hammer2_cluster_load_async(cluster, hammer2_strategy_read_callback,
2179                                    nbio);
2180         return(0);
2181 }
2182
2183 /*
2184  * Read callback for hammer2_cluster_load_async().  The load function may
2185  * start several actual I/Os but will only make one callback, typically with
2186  * the first valid I/O XXX
2187  */
2188 static
2189 void
2190 hammer2_strategy_read_callback(hammer2_iocb_t *iocb)
2191 {
2192         struct bio *bio = iocb->ptr;    /* original logical buffer */
2193         struct buf *bp = bio->bio_buf;  /* original logical buffer */
2194         hammer2_chain_t *chain;
2195         hammer2_cluster_t *cluster;
2196         hammer2_io_t *dio;
2197         char *data;
2198         int i;
2199
2200         /*
2201          * Extract data and handle iteration on I/O failure.  iocb->off
2202          * is the cluster index for iteration.
2203          */
2204         cluster = iocb->cluster;
2205         dio = iocb->dio;        /* can be NULL if iocb not in progress */
2206
2207         /*
2208          * Work to do if INPROG set, else dio is already good or dio is
2209          * NULL (which is the shortcut case if chain->data is already good).
2210          */
2211         if (iocb->flags & HAMMER2_IOCB_INPROG) {
2212                 /*
2213                  * Read attempt not yet made.  Issue an asynchronous read
2214                  * if necessary and return, operation will chain back to
2215                  * this function.
2216                  */
2217                 if ((iocb->flags & HAMMER2_IOCB_READ) == 0) {
2218                         if (dio->bp == NULL ||
2219                             (dio->bp->b_flags & B_CACHE) == 0) {
2220                                 if (dio->bp) {
2221                                         bqrelse(dio->bp);
2222                                         dio->bp = NULL;
2223                                 }
2224                                 iocb->flags |= HAMMER2_IOCB_READ;
2225                                 breadcb(dio->hmp->devvp,
2226                                         dio->pbase, dio->psize,
2227                                         hammer2_io_callback, iocb);
2228                                 return;
2229                         }
2230                 }
2231         }
2232
2233         /*
2234          * If we have a DIO it is now done, check for an error and
2235          * calculate the data.
2236          *
2237          * If there is no DIO it is an optimization by
2238          * hammer2_cluster_load_async(), the data is available in
2239          * chain->data.
2240          */
2241         if (dio) {
2242                 if (dio->bp->b_flags & B_ERROR) {
2243                         i = (int)iocb->lbase + 1;
2244                         if (i >= cluster->nchains) {
2245                                 bp->b_flags |= B_ERROR;
2246                                 bp->b_error = dio->bp->b_error;
2247                                 hammer2_io_complete(iocb);
2248                                 biodone(bio);
2249                                 hammer2_cluster_unlock(cluster);
2250                                 hammer2_cluster_drop(cluster);
2251                         } else {
2252                                 hammer2_io_complete(iocb); /* XXX */
2253                                 chain = cluster->array[i].chain;
2254                                 kprintf("hammer2: IO CHAIN-%d %p\n", i, chain);
2255                                 hammer2_adjreadcounter(&chain->bref,
2256                                                        chain->bytes);
2257                                 iocb->chain = chain;
2258                                 iocb->lbase = (off_t)i;
2259                                 iocb->flags = 0;
2260                                 iocb->error = 0;
2261                                 hammer2_io_getblk(chain->hmp,
2262                                                   chain->bref.data_off,
2263                                                   chain->bytes,
2264                                                   iocb);
2265                         }
2266                         return;
2267                 }
2268                 chain = iocb->chain;
2269                 data = hammer2_io_data(dio, chain->bref.data_off);
2270         } else {
2271                 /*
2272                  * Special synchronous case, data present in chain->data.
2273                  */
2274                 chain = iocb->chain;
2275                 data = (void *)chain->data;
2276         }
2277
2278         if (chain->bref.type == HAMMER2_BREF_TYPE_INODE) {
2279                 /*
2280                  * Data is embedded in the inode (copy from inode).
2281                  */
2282                 bcopy(((hammer2_inode_data_t *)data)->u.data,
2283                       bp->b_data, HAMMER2_EMBEDDED_BYTES);
2284                 bzero(bp->b_data + HAMMER2_EMBEDDED_BYTES,
2285                       bp->b_bcount - HAMMER2_EMBEDDED_BYTES);
2286                 bp->b_resid = 0;
2287                 bp->b_error = 0;
2288         } else if (chain->bref.type == HAMMER2_BREF_TYPE_DATA) {
2289                 /*
2290                  * Data is on-media, issue device I/O and copy.
2291                  *
2292                  * XXX direct-IO shortcut could go here XXX.
2293                  */
2294                 switch (HAMMER2_DEC_COMP(chain->bref.methods)) {
2295                 case HAMMER2_COMP_LZ4:
2296                         hammer2_decompress_LZ4_callback(data, chain->bytes,
2297                                                         bio);
2298                         break;
2299                 case HAMMER2_COMP_ZLIB:
2300                         hammer2_decompress_ZLIB_callback(data, chain->bytes,
2301                                                          bio);
2302                         break;
2303                 case HAMMER2_COMP_NONE:
2304                         KKASSERT(chain->bytes <= bp->b_bcount);
2305                         bcopy(data, bp->b_data, chain->bytes);
2306                         if (chain->bytes < bp->b_bcount) {
2307                                 bzero(bp->b_data + chain->bytes,
2308                                       bp->b_bcount - chain->bytes);
2309                         }
2310                         bp->b_flags |= B_NOTMETA;
2311                         bp->b_resid = 0;
2312                         bp->b_error = 0;
2313                         break;
2314                 default:
2315                         panic("hammer2_strategy_read: "
2316                               "unknown compression type");
2317                 }
2318         } else {
2319                 /* bqrelse the dio to help stabilize the call to panic() */
2320                 if (dio)
2321                         hammer2_io_bqrelse(&dio);
2322                 panic("hammer2_strategy_read: unknown bref type");
2323         }
2324
2325         /*
2326          * Once the iocb is cleaned up the DIO (if any) will no longer be
2327          * in-progress but will still have a ref.  Be sure to release
2328          * the ref.
2329          */
2330         hammer2_io_complete(iocb);              /* physical management */
2331         if (dio)                                /* physical dio & buffer */
2332                 hammer2_io_bqrelse(&dio);
2333         hammer2_cluster_unlock(cluster);        /* cluster management */
2334         hammer2_cluster_drop(cluster);          /* cluster management */
2335         biodone(bio);                           /* logical buffer */
2336 }
2337
2338 static
2339 int
2340 hammer2_strategy_write(struct vop_strategy_args *ap)
2341 {
2342         hammer2_pfs_t *pmp;
2343         struct bio *bio;
2344         struct buf *bp;
2345         hammer2_inode_t *ip;
2346
2347         bio = ap->a_bio;
2348         bp = bio->bio_buf;
2349         ip = VTOI(ap->a_vp);
2350         pmp = ip->pmp;
2351
2352         hammer2_lwinprog_ref(pmp);
2353         hammer2_mtx_ex(&pmp->wthread_mtx);
2354         if (TAILQ_EMPTY(&pmp->wthread_bioq.queue)) {
2355                 bioq_insert_tail(&pmp->wthread_bioq, ap->a_bio);
2356                 hammer2_mtx_unlock(&pmp->wthread_mtx);
2357                 wakeup(&pmp->wthread_bioq);
2358         } else {
2359                 bioq_insert_tail(&pmp->wthread_bioq, ap->a_bio);
2360                 hammer2_mtx_unlock(&pmp->wthread_mtx);
2361         }
2362         hammer2_lwinprog_wait(pmp);
2363
2364         return(0);
2365 }
2366
2367 /*
2368  * hammer2_vop_ioctl { vp, command, data, fflag, cred }
2369  */
2370 static
2371 int
2372 hammer2_vop_ioctl(struct vop_ioctl_args *ap)
2373 {
2374         hammer2_inode_t *ip;
2375         int error;
2376
2377         LOCKSTART;
2378         ip = VTOI(ap->a_vp);
2379
2380         error = hammer2_ioctl(ip, ap->a_command, (void *)ap->a_data,
2381                               ap->a_fflag, ap->a_cred);
2382         LOCKSTOP;
2383         return (error);
2384 }
2385
2386 static
2387 int
2388 hammer2_vop_mountctl(struct vop_mountctl_args *ap)
2389 {
2390         struct mount *mp;
2391         hammer2_pfs_t *pmp;
2392         int rc;
2393
2394         LOCKSTART;
2395         switch (ap->a_op) {
2396         case (MOUNTCTL_SET_EXPORT):
2397                 mp = ap->a_head.a_ops->head.vv_mount;
2398                 pmp = MPTOPMP(mp);
2399
2400                 if (ap->a_ctllen != sizeof(struct export_args))
2401                         rc = (EINVAL);
2402                 else
2403                         rc = vfs_export(mp, &pmp->export,
2404                                         (const struct export_args *)ap->a_ctl);
2405                 break;
2406         default:
2407                 rc = vop_stdmountctl(ap);
2408                 break;
2409         }
2410         LOCKSTOP;
2411         return (rc);
2412 }
2413
2414 /*
2415  * This handles unlinked open files after the vnode is finally dereferenced.
2416  * To avoid deadlocks it cannot be called from the normal vnode recycling
2417  * path, so we call it (1) after a unlink, rmdir, or rename, (2) on every
2418  * flush, and (3) on umount.
2419  */
2420 void
2421 hammer2_run_unlinkq(hammer2_trans_t *trans, hammer2_pfs_t *pmp)
2422 {
2423         const hammer2_inode_data_t *ripdata;
2424         hammer2_inode_unlink_t *ipul;
2425         hammer2_inode_t *ip;
2426         hammer2_cluster_t *cluster;
2427         hammer2_cluster_t *cparent;
2428
2429         if (TAILQ_EMPTY(&pmp->unlinkq))
2430                 return;
2431
2432         LOCKSTART;
2433         hammer2_spin_ex(&pmp->list_spin);
2434         while ((ipul = TAILQ_FIRST(&pmp->unlinkq)) != NULL) {
2435                 TAILQ_REMOVE(&pmp->unlinkq, ipul, entry);
2436                 hammer2_spin_unex(&pmp->list_spin);
2437                 ip = ipul->ip;
2438                 kfree(ipul, pmp->minode);
2439
2440                 cluster = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS);
2441                 ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
2442                 if (hammer2_debug & 0x400) {
2443                         kprintf("hammer2: unlink on reclaim: %s refs=%d\n",
2444                                 ripdata->filename, ip->refs);
2445                 }
2446                 KKASSERT(ripdata->nlinks == 0);
2447
2448                 cparent = hammer2_cluster_parent(cluster);
2449                 hammer2_cluster_delete(trans, cparent, cluster,
2450                                        HAMMER2_DELETE_PERMANENT);
2451                 hammer2_cluster_unlock(cparent);
2452                 hammer2_cluster_drop(cparent);
2453                 hammer2_inode_unlock(ip, cluster);      /* inode lock */
2454                 hammer2_inode_drop(ip);                 /* ipul ref */
2455
2456                 hammer2_spin_ex(&pmp->list_spin);
2457         }
2458         hammer2_spin_unex(&pmp->list_spin);
2459         LOCKSTOP;
2460 }
2461
2462
2463 /*
2464  * KQFILTER
2465  */
2466 static void filt_hammer2detach(struct knote *kn);
2467 static int filt_hammer2read(struct knote *kn, long hint);
2468 static int filt_hammer2write(struct knote *kn, long hint);
2469 static int filt_hammer2vnode(struct knote *kn, long hint);
2470
2471 static struct filterops hammer2read_filtops =
2472         { FILTEROP_ISFD | FILTEROP_MPSAFE,
2473           NULL, filt_hammer2detach, filt_hammer2read };
2474 static struct filterops hammer2write_filtops =
2475         { FILTEROP_ISFD | FILTEROP_MPSAFE,
2476           NULL, filt_hammer2detach, filt_hammer2write };
2477 static struct filterops hammer2vnode_filtops =
2478         { FILTEROP_ISFD | FILTEROP_MPSAFE,
2479           NULL, filt_hammer2detach, filt_hammer2vnode };
2480
2481 static
2482 int
2483 hammer2_vop_kqfilter(struct vop_kqfilter_args *ap)
2484 {
2485         struct vnode *vp = ap->a_vp;
2486         struct knote *kn = ap->a_kn;
2487
2488         switch (kn->kn_filter) {
2489         case EVFILT_READ:
2490                 kn->kn_fop = &hammer2read_filtops;
2491                 break;
2492         case EVFILT_WRITE:
2493                 kn->kn_fop = &hammer2write_filtops;
2494                 break;
2495         case EVFILT_VNODE:
2496                 kn->kn_fop = &hammer2vnode_filtops;
2497                 break;
2498         default:
2499                 return (EOPNOTSUPP);
2500         }
2501
2502         kn->kn_hook = (caddr_t)vp;
2503
2504         knote_insert(&vp->v_pollinfo.vpi_kqinfo.ki_note, kn);
2505
2506         return(0);
2507 }
2508
2509 static void
2510 filt_hammer2detach(struct knote *kn)
2511 {
2512         struct vnode *vp = (void *)kn->kn_hook;
2513
2514         knote_remove(&vp->v_pollinfo.vpi_kqinfo.ki_note, kn);
2515 }
2516
2517 static int
2518 filt_hammer2read(struct knote *kn, long hint)
2519 {
2520         struct vnode *vp = (void *)kn->kn_hook;
2521         hammer2_inode_t *ip = VTOI(vp);
2522         off_t off;
2523
2524         if (hint == NOTE_REVOKE) {
2525                 kn->kn_flags |= (EV_EOF | EV_NODATA | EV_ONESHOT);
2526                 return(1);
2527         }
2528         off = ip->size - kn->kn_fp->f_offset;
2529         kn->kn_data = (off < INTPTR_MAX) ? off : INTPTR_MAX;
2530         if (kn->kn_sfflags & NOTE_OLDAPI)
2531                 return(1);
2532         return (kn->kn_data != 0);
2533 }
2534
2535
2536 static int
2537 filt_hammer2write(struct knote *kn, long hint)
2538 {
2539         if (hint == NOTE_REVOKE)
2540                 kn->kn_flags |= (EV_EOF | EV_NODATA | EV_ONESHOT);
2541         kn->kn_data = 0;
2542         return (1);
2543 }
2544
2545 static int
2546 filt_hammer2vnode(struct knote *kn, long hint)
2547 {
2548         if (kn->kn_sfflags & hint)
2549                 kn->kn_fflags |= hint;
2550         if (hint == NOTE_REVOKE) {
2551                 kn->kn_flags |= (EV_EOF | EV_NODATA);
2552                 return (1);
2553         }
2554         return (kn->kn_fflags != 0);
2555 }
2556
2557 /*
2558  * FIFO VOPS
2559  */
2560 static
2561 int
2562 hammer2_vop_markatime(struct vop_markatime_args *ap)
2563 {
2564         hammer2_inode_t *ip;
2565         struct vnode *vp;
2566
2567         vp = ap->a_vp;
2568         ip = VTOI(vp);
2569
2570         if (ip->pmp->ronly)
2571                 return(EROFS);
2572         return(0);
2573 }
2574
2575 static
2576 int
2577 hammer2_vop_fifokqfilter(struct vop_kqfilter_args *ap)
2578 {
2579         int error;
2580
2581         error = VOCALL(&fifo_vnode_vops, &ap->a_head);
2582         if (error)
2583                 error = hammer2_vop_kqfilter(ap);
2584         return(error);
2585 }
2586
2587 /*
2588  * VOPS vector
2589  */
2590 struct vop_ops hammer2_vnode_vops = {
2591         .vop_default    = vop_defaultop,
2592         .vop_fsync      = hammer2_vop_fsync,
2593         .vop_getpages   = vop_stdgetpages,
2594         .vop_putpages   = vop_stdputpages,
2595         .vop_access     = hammer2_vop_access,
2596         .vop_advlock    = hammer2_vop_advlock,
2597         .vop_close      = hammer2_vop_close,
2598         .vop_nlink      = hammer2_vop_nlink,
2599         .vop_ncreate    = hammer2_vop_ncreate,
2600         .vop_nsymlink   = hammer2_vop_nsymlink,
2601         .vop_nremove    = hammer2_vop_nremove,
2602         .vop_nrmdir     = hammer2_vop_nrmdir,
2603         .vop_nrename    = hammer2_vop_nrename,
2604         .vop_getattr    = hammer2_vop_getattr,
2605         .vop_setattr    = hammer2_vop_setattr,
2606         .vop_readdir    = hammer2_vop_readdir,
2607         .vop_readlink   = hammer2_vop_readlink,
2608         .vop_getpages   = vop_stdgetpages,
2609         .vop_putpages   = vop_stdputpages,
2610         .vop_read       = hammer2_vop_read,
2611         .vop_write      = hammer2_vop_write,
2612         .vop_open       = hammer2_vop_open,
2613         .vop_inactive   = hammer2_vop_inactive,
2614         .vop_reclaim    = hammer2_vop_reclaim,
2615         .vop_nresolve   = hammer2_vop_nresolve,
2616         .vop_nlookupdotdot = hammer2_vop_nlookupdotdot,
2617         .vop_nmkdir     = hammer2_vop_nmkdir,
2618         .vop_nmknod     = hammer2_vop_nmknod,
2619         .vop_ioctl      = hammer2_vop_ioctl,
2620         .vop_mountctl   = hammer2_vop_mountctl,
2621         .vop_bmap       = hammer2_vop_bmap,
2622         .vop_strategy   = hammer2_vop_strategy,
2623         .vop_kqfilter   = hammer2_vop_kqfilter
2624 };
2625
2626 struct vop_ops hammer2_spec_vops = {
2627         .vop_default =          vop_defaultop,
2628         .vop_fsync =            hammer2_vop_fsync,
2629         .vop_read =             vop_stdnoread,
2630         .vop_write =            vop_stdnowrite,
2631         .vop_access =           hammer2_vop_access,
2632         .vop_close =            hammer2_vop_close,
2633         .vop_markatime =        hammer2_vop_markatime,
2634         .vop_getattr =          hammer2_vop_getattr,
2635         .vop_inactive =         hammer2_vop_inactive,
2636         .vop_reclaim =          hammer2_vop_reclaim,
2637         .vop_setattr =          hammer2_vop_setattr
2638 };
2639
2640 struct vop_ops hammer2_fifo_vops = {
2641         .vop_default =          fifo_vnoperate,
2642         .vop_fsync =            hammer2_vop_fsync,
2643 #if 0
2644         .vop_read =             hammer2_vop_fiforead,
2645         .vop_write =            hammer2_vop_fifowrite,
2646 #endif
2647         .vop_access =           hammer2_vop_access,
2648 #if 0
2649         .vop_close =            hammer2_vop_fifoclose,
2650 #endif
2651         .vop_markatime =        hammer2_vop_markatime,
2652         .vop_getattr =          hammer2_vop_getattr,
2653         .vop_inactive =         hammer2_vop_inactive,
2654         .vop_reclaim =          hammer2_vop_reclaim,
2655         .vop_setattr =          hammer2_vop_setattr,
2656         .vop_kqfilter =         hammer2_vop_fifokqfilter
2657 };
2658