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         hammer2_inode_unlock(ip, cluster);
 350         hammer2_trans_done(&trans);
 351
 352         LOCKSTOP;
 353         return (0);
 354 }
 355
 356 static
 357 int
 358 hammer2_vop_access(struct vop_access_args *ap)
 359 {
 360         hammer2_inode_t *ip = VTOI(ap->a_vp);
 361         const hammer2_inode_data_t *ripdata;
 362         hammer2_cluster_t *cluster;
 363         uid_t uid;
 364         gid_t gid;
 365         int error;
 366
 367         LOCKSTART;
 368         cluster = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS |
 369                                          HAMMER2_RESOLVE_SHARED);
 370         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
 371         uid = hammer2_to_unix_xid(&ripdata->uid);
 372         gid = hammer2_to_unix_xid(&ripdata->gid);
 373         error = vop_helper_access(ap, uid, gid, ripdata->mode, ripdata->uflags);
 374         hammer2_inode_unlock(ip, cluster);
 375
 376         LOCKSTOP;
 377         return (error);
 378 }
 379
 380 static
 381 int
 382 hammer2_vop_getattr(struct vop_getattr_args *ap)
 383 {
 384         const hammer2_inode_data_t *ripdata;
 385         hammer2_cluster_t *cluster;
 386         hammer2_pfs_t *pmp;
 387         hammer2_inode_t *ip;
 388         hammer2_blockref_t bref;
 389         struct vnode *vp;
 390         struct vattr *vap;
 391
 392         LOCKSTART;
 393         vp = ap->a_vp;
 394         vap = ap->a_vap;
 395
 396         ip = VTOI(vp);
 397         pmp = ip->pmp;
 398
 399         cluster = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS |
 400                                          HAMMER2_RESOLVE_SHARED);
 401         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
 402         KKASSERT(hammer2_cluster_type(cluster) == HAMMER2_BREF_TYPE_INODE);
 403         hammer2_cluster_bref(cluster, &bref);
 404
 405         vap->va_fsid = pmp->mp->mnt_stat.f_fsid.val[0];
 406         vap->va_fileid = ripdata->inum;
 407         vap->va_mode = ripdata->mode;
 408         vap->va_nlink = ripdata->nlinks;
 409         vap->va_uid = hammer2_to_unix_xid(&ripdata->uid);
 410         vap->va_gid = hammer2_to_unix_xid(&ripdata->gid);
 411         vap->va_rmajor = 0;
 412         vap->va_rminor = 0;
 413         vap->va_size = ip->size;        /* protected by shared lock */
 414         vap->va_blocksize = HAMMER2_PBUFSIZE;
 415         vap->va_flags = ripdata->uflags;
 416         hammer2_time_to_timespec(ripdata->ctime, &vap->va_ctime);
 417         hammer2_time_to_timespec(ripdata->mtime, &vap->va_mtime);
 418         hammer2_time_to_timespec(ripdata->mtime, &vap->va_atime);
 419         vap->va_gen = 1;
 420         vap->va_bytes = bref.data_count;
 421         vap->va_type = hammer2_get_vtype(ripdata);
 422         vap->va_filerev = 0;
 423         vap->va_uid_uuid = ripdata->uid;
 424         vap->va_gid_uuid = ripdata->gid;
 425         vap->va_vaflags = VA_UID_UUID_VALID | VA_GID_UUID_VALID |
 426                           VA_FSID_UUID_VALID;
 427
 428         hammer2_inode_unlock(ip, cluster);
 429
 430         LOCKSTOP;
 431         return (0);
 432 }
 433
 434 static
 435 int
 436 hammer2_vop_setattr(struct vop_setattr_args *ap)
 437 {
 438         const hammer2_inode_data_t *ripdata;
 439         hammer2_inode_data_t *wipdata;
 440         hammer2_inode_t *ip;
 441         hammer2_cluster_t *cluster;
 442         hammer2_trans_t trans;
 443         struct vnode *vp;
 444         struct vattr *vap;
 445         int error;
 446         int kflags = 0;
 447         int domtime = 0;
 448         int dosync = 0;
 449         uint64_t ctime;
 450
 451         LOCKSTART;
 452         vp = ap->a_vp;
 453         vap = ap->a_vap;
 454         hammer2_update_time(&ctime);
 455
 456         ip = VTOI(vp);
 457
 458         if (ip->pmp->ronly) {
 459                 LOCKSTOP;
 460                 return(EROFS);
 461         }
 462
 463         hammer2_pfs_memory_wait(ip->pmp);
 464         hammer2_trans_init(&trans, ip->pmp, 0);
 465         cluster = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS);
 466         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
 467         error = 0;
 468
 469         if (vap->va_flags != VNOVAL) {
 470                 u_int32_t flags;
 471
 472                 flags = ripdata->uflags;
 473                 error = vop_helper_setattr_flags(&flags, vap->va_flags,
 474                                          hammer2_to_unix_xid(&ripdata->uid),
 475                                          ap->a_cred);
 476                 if (error == 0) {
 477                         if (ripdata->uflags != flags) {
 478                                 wipdata = hammer2_cluster_modify_ip(&trans, ip,
 479                                                                     cluster, 0);
 480                                 wipdata->uflags = flags;
 481                                 wipdata->ctime = ctime;
 482                                 kflags |= NOTE_ATTRIB;
 483                                 dosync = 1;
 484                                 ripdata = wipdata;
 485                         }
 486                         if (ripdata->uflags & (IMMUTABLE | APPEND)) {
 487                                 error = 0;
 488                                 goto done;
 489                         }
 490                 }
 491                 goto done;
 492         }
 493         if (ripdata->uflags & (IMMUTABLE | APPEND)) {
 494                 error = EPERM;
 495                 goto done;
 496         }
 497         if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
 498                 mode_t cur_mode = ripdata->mode;
 499                 uid_t cur_uid = hammer2_to_unix_xid(&ripdata->uid);
 500                 gid_t cur_gid = hammer2_to_unix_xid(&ripdata->gid);
 501                 uuid_t uuid_uid;
 502                 uuid_t uuid_gid;
 503
 504                 error = vop_helper_chown(ap->a_vp, vap->va_uid, vap->va_gid,
 505                                          ap->a_cred,
 506                                          &cur_uid, &cur_gid, &cur_mode);
 507                 if (error == 0) {
 508                         hammer2_guid_to_uuid(&uuid_uid, cur_uid);
 509                         hammer2_guid_to_uuid(&uuid_gid, cur_gid);
 510                         if (bcmp(&uuid_uid, &ripdata->uid, sizeof(uuid_uid)) ||
 511                             bcmp(&uuid_gid, &ripdata->gid, sizeof(uuid_gid)) ||
 512                             ripdata->mode != cur_mode
 513                         ) {
 514                                 wipdata = hammer2_cluster_modify_ip(&trans, ip,
 515                                                                     cluster, 0);
 516                                 wipdata->uid = uuid_uid;
 517                                 wipdata->gid = uuid_gid;
 518                                 wipdata->mode = cur_mode;
 519                                 wipdata->ctime = ctime;
 520                                 dosync = 1;
 521                                 ripdata = wipdata;
 522                         }
 523                         kflags |= NOTE_ATTRIB;
 524                 }
 525         }
 526
 527         /*
 528          * Resize the file
 529          */
 530         if (vap->va_size != VNOVAL && ip->size != vap->va_size) {
 531                 switch(vp->v_type) {
 532                 case VREG:
 533                         if (vap->va_size == ip->size)
 534                                 break;
 535                         hammer2_inode_unlock(ip, cluster);
 536                         if (vap->va_size < ip->size) {
 537                                 hammer2_truncate_file(ip, vap->va_size);
 538                         } else {
 539                                 hammer2_extend_file(ip, vap->va_size);
 540                         }
 541                         cluster = hammer2_inode_lock(ip,
 542                                                      HAMMER2_RESOLVE_ALWAYS);
 543                         /* RELOAD */
 544                         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
 545                         domtime = 1;
 546                         break;
 547                 default:
 548                         error = EINVAL;
 549                         goto done;
 550                 }
 551         }
 552 #if 0
 553         /* atime not supported */
 554         if (vap->va_atime.tv_sec != VNOVAL) {
 555                 wipdata = hammer2_cluster_modify_ip(&trans, ip, cluster, 0);
 556                 wipdata->atime = hammer2_timespec_to_time(&vap->va_atime);
 557                 kflags |= NOTE_ATTRIB;
 558                 dosync = 1;
 559                 ripdata = wipdata;
 560         }
 561 #endif
 562         if (vap->va_mtime.tv_sec != VNOVAL) {
 563                 wipdata = hammer2_cluster_modify_ip(&trans, ip, cluster, 0);
 564                 wipdata->mtime = hammer2_timespec_to_time(&vap->va_mtime);
 565                 kflags |= NOTE_ATTRIB;
 566                 domtime = 0;
 567                 dosync = 1;
 568                 ripdata = wipdata;
 569         }
 570         if (vap->va_mode != (mode_t)VNOVAL) {
 571                 mode_t cur_mode = ripdata->mode;
 572                 uid_t cur_uid = hammer2_to_unix_xid(&ripdata->uid);
 573                 gid_t cur_gid = hammer2_to_unix_xid(&ripdata->gid);
 574
 575                 error = vop_helper_chmod(ap->a_vp, vap->va_mode, ap->a_cred,
 576                                          cur_uid, cur_gid, &cur_mode);
 577                 if (error == 0 && ripdata->mode != cur_mode) {
 578                         wipdata = hammer2_cluster_modify_ip(&trans, ip,
 579                                                             cluster, 0);
 580                         wipdata->mode = cur_mode;
 581                         wipdata->ctime = ctime;
 582                         kflags |= NOTE_ATTRIB;
 583                         dosync = 1;
 584                         ripdata = wipdata;
 585                 }
 586         }
 587
 588         /*
 589          * If a truncation occurred we must call inode_fsync() now in order
 590          * to trim the related data chains, otherwise a later expansion can
 591          * cause havoc.
 592          */
 593         if (dosync) {
 594                 hammer2_cluster_modsync(cluster);
 595                 dosync = 0;
 596         }
 597         hammer2_inode_fsync(&trans, ip, cluster);
 598
 599         /*
 600          * Cleanup.  If domtime is set an additional inode modification
 601          * must be flagged.  All other modifications will have already
 602          * set INODE_MODIFIED and called vsetisdirty().
 603          */
 604 done:
 605         if (domtime) {
 606                 atomic_set_int(&ip->flags, HAMMER2_INODE_MODIFIED |
 607                                            HAMMER2_INODE_MTIME);
 608                 vsetisdirty(ip->vp);
 609         }
 610         if (dosync)
 611                 hammer2_cluster_modsync(cluster);
 612         hammer2_inode_unlock(ip, cluster);
 613         hammer2_trans_done(&trans);
 614         hammer2_knote(ip->vp, kflags);
 615
 616         LOCKSTOP;
 617         return (error);
 618 }
 619
 620 static
 621 int
 622 hammer2_vop_readdir(struct vop_readdir_args *ap)
 623 {
 624         const hammer2_inode_data_t *ripdata;
 625         hammer2_inode_t *ip;
 626         hammer2_inode_t *xip;
 627         hammer2_cluster_t *cparent;
 628         hammer2_cluster_t *cluster;
 629         hammer2_cluster_t *xcluster;
 630         hammer2_blockref_t bref;
 631         hammer2_tid_t inum;
 632         hammer2_key_t key_next;
 633         hammer2_key_t lkey;
 634         struct uio *uio;
 635         off_t *cookies;
 636         off_t saveoff;
 637         int cookie_index;
 638         int ncookies;
 639         int error;
 640         int dtype;
 641         int r;
 642
 643         LOCKSTART;
 644         ip = VTOI(ap->a_vp);
 645         uio = ap->a_uio;
 646         saveoff = uio->uio_offset;
 647
 648         /*
 649          * Setup cookies directory entry cookies if requested
 650          */
 651         if (ap->a_ncookies) {
 652                 ncookies = uio->uio_resid / 16 + 1;
 653                 if (ncookies > 1024)
 654                         ncookies = 1024;
 655                 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
 656         } else {
 657                 ncookies = -1;
 658                 cookies = NULL;
 659         }
 660         cookie_index = 0;
 661
 662         cparent = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS |
 663                                          HAMMER2_RESOLVE_SHARED);
 664
 665         ripdata = &hammer2_cluster_rdata(cparent)->ipdata;
 666
 667         /*
 668          * Handle artificial entries.  To ensure that only positive 64 bit
 669          * quantities are returned to userland we always strip off bit 63.
 670          * The hash code is designed such that codes 0x0000-0x7FFF are not
 671          * used, allowing us to use these codes for articial entries.
 672          *
 673          * Entry 0 is used for '.' and entry 1 is used for '..'.  Do not
 674          * allow '..' to cross the mount point into (e.g.) the super-root.
 675          */
 676         error = 0;
 677         cluster = (void *)(intptr_t)-1; /* non-NULL for early goto done case */
 678
 679         if (saveoff == 0) {
 680                 inum = ripdata->inum & HAMMER2_DIRHASH_USERMSK;
 681                 r = vop_write_dirent(&error, uio, inum, DT_DIR, 1, ".");
 682                 if (r)
 683                         goto done;
 684                 if (cookies)
 685                         cookies[cookie_index] = saveoff;
 686                 ++saveoff;
 687                 ++cookie_index;
 688                 if (cookie_index == ncookies)
 689                         goto done;
 690         }
 691
 692         if (saveoff == 1) {
 693                 /*
 694                  * Be careful with lockorder when accessing ".."
 695                  *
 696                  * (ip is the current dir. xip is the parent dir).
 697                  */
 698                 inum = ripdata->inum & HAMMER2_DIRHASH_USERMSK;
 699                 while (ip->pip != NULL && ip != ip->pmp->iroot) {
 700                         xip = ip->pip;
 701                         hammer2_inode_ref(xip);
 702                         hammer2_inode_unlock(ip, cparent);
 703                         xcluster = hammer2_inode_lock(xip,
 704                                                       HAMMER2_RESOLVE_ALWAYS |
 705                                                       HAMMER2_RESOLVE_SHARED);
 706
 707                         cparent = hammer2_inode_lock(ip,
 708                                                       HAMMER2_RESOLVE_ALWAYS |
 709                                                       HAMMER2_RESOLVE_SHARED);
 710                         hammer2_inode_drop(xip);
 711                         ripdata = &hammer2_cluster_rdata(cparent)->ipdata;
 712                         if (xip == ip->pip) {
 713                                 inum = hammer2_cluster_rdata(xcluster)->
 714                                         ipdata.inum & HAMMER2_DIRHASH_USERMSK;
 715                                 hammer2_inode_unlock(xip, xcluster);
 716                                 break;
 717                         }
 718                         hammer2_inode_unlock(xip, xcluster);
 719                 }
 720                 r = vop_write_dirent(&error, uio, inum, DT_DIR, 2, "..");
 721                 if (r)
 722                         goto done;
 723                 if (cookies)
 724                         cookies[cookie_index] = saveoff;
 725                 ++saveoff;
 726                 ++cookie_index;
 727                 if (cookie_index == ncookies)
 728                         goto done;
 729         }
 730
 731         lkey = saveoff | HAMMER2_DIRHASH_VISIBLE;
 732         if (hammer2_debug & 0x0020)
 733                 kprintf("readdir: lkey %016jx\n", lkey);
 734
 735         /*
 736          * parent is the inode cluster, already locked for us.  Don't
 737          * double lock shared locks as this will screw up upgrades.
 738          */
 739         if (error) {
 740                 goto done;
 741         }
 742         cluster = hammer2_cluster_lookup(cparent, &key_next, lkey, lkey,
 743                                      HAMMER2_LOOKUP_SHARED);
 744         if (cluster == NULL) {
 745                 cluster = hammer2_cluster_lookup(cparent, &key_next,
 746                                              lkey, (hammer2_key_t)-1,
 747                                              HAMMER2_LOOKUP_SHARED);
 748         }
 749         if (cluster)
 750                 hammer2_cluster_bref(cluster, &bref);
 751         while (cluster) {
 752                 if (hammer2_debug & 0x0020)
 753                         kprintf("readdir: p=%p chain=%p %016jx (next %016jx)\n",
 754                                 cparent->focus, cluster->focus,
 755                                 bref.key, key_next);
 756
 757                 if (bref.type == HAMMER2_BREF_TYPE_INODE) {
 758                         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
 759                         dtype = hammer2_get_dtype(ripdata);
 760                         saveoff = bref.key & HAMMER2_DIRHASH_USERMSK;
 761                         r = vop_write_dirent(&error, uio,
 762                                              ripdata->inum &
 763                                               HAMMER2_DIRHASH_USERMSK,
 764                                              dtype,
 765                                              ripdata->name_len,
 766                                              ripdata->filename);
 767                         if (r)
 768                                 break;
 769                         if (cookies)
 770                                 cookies[cookie_index] = saveoff;
 771                         ++cookie_index;
 772                 } else {
 773                         /* XXX chain error */
 774                         kprintf("bad chain type readdir %d\n", bref.type);
 775                 }
 776
 777                 /*
 778                  * Keys may not be returned in order so once we have a
 779                  * placemarker (cluster) the scan must allow the full range
 780                  * or some entries will be missed.
 781                  */
 782                 cluster = hammer2_cluster_next(cparent, cluster, &key_next,
 783                                                key_next, (hammer2_key_t)-1,
 784                                                HAMMER2_LOOKUP_SHARED);
 785                 if (cluster) {
 786                         hammer2_cluster_bref(cluster, &bref);
 787                         saveoff = (bref.key & HAMMER2_DIRHASH_USERMSK) + 1;
 788                 } else {
 789                         saveoff = (hammer2_key_t)-1;
 790                 }
 791                 if (cookie_index == ncookies)
 792                         break;
 793         }
 794         if (cluster) {
 795                 hammer2_cluster_unlock(cluster);
 796                 hammer2_cluster_drop(cluster);
 797         }
 798 done:
 799         hammer2_inode_unlock(ip, cparent);
 800         if (ap->a_eofflag)
 801                 *ap->a_eofflag = (cluster == NULL);
 802         if (hammer2_debug & 0x0020)
 803                 kprintf("readdir: done at %016jx\n", saveoff);
 804         uio->uio_offset = saveoff & ~HAMMER2_DIRHASH_VISIBLE;
 805         if (error && cookie_index == 0) {
 806                 if (cookies) {
 807                         kfree(cookies, M_TEMP);
 808                         *ap->a_ncookies = 0;
 809                         *ap->a_cookies = NULL;
 810                 }
 811         } else {
 812                 if (cookies) {
 813                         *ap->a_ncookies = cookie_index;
 814                         *ap->a_cookies = cookies;
 815                 }
 816         }
 817         LOCKSTOP;
 818         return (error);
 819 }
 820
 821 /*
 822  * hammer2_vop_readlink { vp, uio, cred }
 823  */
 824 static
 825 int
 826 hammer2_vop_readlink(struct vop_readlink_args *ap)
 827 {
 828         struct vnode *vp;
 829         hammer2_inode_t *ip;
 830         int error;
 831
 832         vp = ap->a_vp;
 833         if (vp->v_type != VLNK)
 834                 return (EINVAL);
 835         ip = VTOI(vp);
 836
 837         error = hammer2_read_file(ip, ap->a_uio, 0);
 838         return (error);
 839 }
 840
 841 static
 842 int
 843 hammer2_vop_read(struct vop_read_args *ap)
 844 {
 845         struct vnode *vp;
 846         hammer2_inode_t *ip;
 847         struct uio *uio;
 848         int error;
 849         int seqcount;
 850         int bigread;
 851
 852         /*
 853          * Read operations supported on this vnode?
 854          */
 855         vp = ap->a_vp;
 856         if (vp->v_type != VREG)
 857                 return (EINVAL);
 858
 859         /*
 860          * Misc
 861          */
 862         ip = VTOI(vp);
 863         uio = ap->a_uio;
 864         error = 0;
 865
 866         seqcount = ap->a_ioflag >> 16;
 867         bigread = (uio->uio_resid > 100 * 1024 * 1024);
 868
 869         error = hammer2_read_file(ip, uio, seqcount);
 870         return (error);
 871 }
 872
 873 static
 874 int
 875 hammer2_vop_write(struct vop_write_args *ap)
 876 {
 877         hammer2_inode_t *ip;
 878         hammer2_trans_t trans;
 879         thread_t td;
 880         struct vnode *vp;
 881         struct uio *uio;
 882         int error;
 883         int seqcount;
 884         int bigwrite;
 885
 886         /*
 887          * Read operations supported on this vnode?
 888          */
 889         vp = ap->a_vp;
 890         if (vp->v_type != VREG)
 891                 return (EINVAL);
 892
 893         /*
 894          * Misc
 895          */
 896         ip = VTOI(vp);
 897         uio = ap->a_uio;
 898         error = 0;
 899         if (ip->pmp->ronly) {
 900                 return (EROFS);
 901         }
 902
 903         seqcount = ap->a_ioflag >> 16;
 904         bigwrite = (uio->uio_resid > 100 * 1024 * 1024);
 905
 906         /*
 907          * Check resource limit
 908          */
 909         if (uio->uio_resid > 0 && (td = uio->uio_td) != NULL && td->td_proc &&
 910             uio->uio_offset + uio->uio_resid >
 911              td->td_proc->p_rlimit[RLIMIT_FSIZE].rlim_cur) {
 912                 lwpsignal(td->td_proc, td->td_lwp, SIGXFSZ);
 913                 return (EFBIG);
 914         }
 915
 916         bigwrite = (uio->uio_resid > 100 * 1024 * 1024);
 917
 918         /*
 919          * The transaction interlocks against flushes initiations
 920          * (note: but will run concurrently with the actual flush).
 921          */
 922         hammer2_trans_init(&trans, ip->pmp, 0);
 923         error = hammer2_write_file(ip, uio, ap->a_ioflag, seqcount);
 924         hammer2_trans_done(&trans);
 925
 926         return (error);
 927 }
 928
 929 /*
 930  * Perform read operations on a file or symlink given an UNLOCKED
 931  * inode and uio.
 932  *
 933  * The passed ip is not locked.
 934  */
 935 static
 936 int
 937 hammer2_read_file(hammer2_inode_t *ip, struct uio *uio, int seqcount)
 938 {
 939         hammer2_off_t size;
 940         struct buf *bp;
 941         int error;
 942
 943         error = 0;
 944
 945         /*
 946          * UIO read loop.
 947          *
 948          * WARNING! Assumes that the kernel interlocks size changes at the
 949          *          vnode level.
 950          */
 951         hammer2_mtx_sh(&ip->lock);
 952         size = ip->size;
 953         hammer2_mtx_unlock(&ip->lock);
 954
 955         while (uio->uio_resid > 0 && uio->uio_offset < size) {
 956                 hammer2_key_t lbase;
 957                 hammer2_key_t leof;
 958                 int lblksize;
 959                 int loff;
 960                 int n;
 961
 962                 lblksize = hammer2_calc_logical(ip, uio->uio_offset,
 963                                                 &lbase, &leof);
 964
 965                 error = cluster_read(ip->vp, leof, lbase, lblksize,
 966                                      uio->uio_resid, seqcount * BKVASIZE,
 967                                      &bp);
 968
 969                 if (error)
 970                         break;
 971                 loff = (int)(uio->uio_offset - lbase);
 972                 n = lblksize - loff;
 973                 if (n > uio->uio_resid)
 974                         n = uio->uio_resid;
 975                 if (n > size - uio->uio_offset)
 976                         n = (int)(size - uio->uio_offset);
 977                 bp->b_flags |= B_AGE;
 978                 uiomove((char *)bp->b_data + loff, n, uio);
 979                 bqrelse(bp);
 980         }
 981         return (error);
 982 }
 983
 984 /*
 985  * Write to the file represented by the inode via the logical buffer cache.
 986  * The inode may represent a regular file or a symlink.
 987  *
 988  * The inode must not be locked.
 989  */
 990 static
 991 int
 992 hammer2_write_file(hammer2_inode_t *ip,
 993                    struct uio *uio, int ioflag, int seqcount)
 994 {
 995         hammer2_key_t old_eof;
 996         hammer2_key_t new_eof;
 997         struct buf *bp;
 998         int kflags;
 999         int error;
1000         int modified;
1001
1002         /*
1003          * Setup if append
1004          *
1005          * WARNING! Assumes that the kernel interlocks size changes at the
1006          *          vnode level.
1007          */
1008         hammer2_mtx_ex(&ip->lock);
1009         if (ioflag & IO_APPEND)
1010                 uio->uio_offset = ip->size;
1011         old_eof = ip->size;
1012         hammer2_mtx_unlock(&ip->lock);
1013
1014         /*
1015          * Extend the file if necessary.  If the write fails at some point
1016          * we will truncate it back down to cover as much as we were able
1017          * to write.
1018          *
1019          * Doing this now makes it easier to calculate buffer sizes in
1020          * the loop.
1021          */
1022         kflags = 0;
1023         error = 0;
1024         modified = 0;
1025
1026         if (uio->uio_offset + uio->uio_resid > old_eof) {
1027                 new_eof = uio->uio_offset + uio->uio_resid;
1028                 modified = 1;
1029                 hammer2_extend_file(ip, new_eof);
1030                 kflags |= NOTE_EXTEND;
1031         } else {
1032                 new_eof = old_eof;
1033         }
1034
1035         /*
1036          * UIO write loop
1037          */
1038         while (uio->uio_resid > 0) {
1039                 hammer2_key_t lbase;
1040                 int trivial;
1041                 int endofblk;
1042                 int lblksize;
1043                 int loff;
1044                 int n;
1045
1046                 /*
1047                  * Don't allow the buffer build to blow out the buffer
1048                  * cache.
1049                  */
1050                 if ((ioflag & IO_RECURSE) == 0)
1051                         bwillwrite(HAMMER2_PBUFSIZE);
1052
1053                 /*
1054                  * This nominally tells us how much we can cluster and
1055                  * what the logical buffer size needs to be.  Currently
1056                  * we don't try to cluster the write and just handle one
1057                  * block at a time.
1058                  */
1059                 lblksize = hammer2_calc_logical(ip, uio->uio_offset,
1060                                                 &lbase, NULL);
1061                 loff = (int)(uio->uio_offset - lbase);
1062
1063                 KKASSERT(lblksize <= 65536);
1064
1065                 /*
1066                  * Calculate bytes to copy this transfer and whether the
1067                  * copy completely covers the buffer or not.
1068                  */
1069                 trivial = 0;
1070                 n = lblksize - loff;
1071                 if (n > uio->uio_resid) {
1072                         n = uio->uio_resid;
1073                         if (loff == lbase && uio->uio_offset + n == new_eof)
1074                                 trivial = 1;
1075                         endofblk = 0;
1076                 } else {
1077                         if (loff == 0)
1078                                 trivial = 1;
1079                         endofblk = 1;
1080                 }
1081
1082                 /*
1083                  * Get the buffer
1084                  */
1085                 if (uio->uio_segflg == UIO_NOCOPY) {
1086                         /*
1087                          * Issuing a write with the same data backing the
1088                          * buffer.  Instantiate the buffer to collect the
1089                          * backing vm pages, then read-in any missing bits.
1090                          *
1091                          * This case is used by vop_stdputpages().
1092                          */
1093                         bp = getblk(ip->vp, lbase, lblksize, GETBLK_BHEAVY, 0);
1094                         if ((bp->b_flags & B_CACHE) == 0) {
1095                                 bqrelse(bp);
1096                                 error = bread(ip->vp, lbase, lblksize, &bp);
1097                         }
1098                 } else if (trivial) {
1099                         /*
1100                          * Even though we are entirely overwriting the buffer
1101                          * we may still have to zero it out to avoid a
1102                          * mmap/write visibility issue.
1103                          */
1104                         bp = getblk(ip->vp, lbase, lblksize, GETBLK_BHEAVY, 0);
1105                         if ((bp->b_flags & B_CACHE) == 0)
1106                                 vfs_bio_clrbuf(bp);
1107                 } else {
1108                         /*
1109                          * Partial overwrite, read in any missing bits then
1110                          * replace the portion being written.
1111                          *
1112                          * (The strategy code will detect zero-fill physical
1113                          * blocks for this case).
1114                          */
1115                         error = bread(ip->vp, lbase, lblksize, &bp);
1116                         if (error == 0)
1117                                 bheavy(bp);
1118                 }
1119
1120                 if (error) {
1121                         brelse(bp);
1122                         break;
1123                 }
1124
1125                 /*
1126                  * Ok, copy the data in
1127                  */
1128                 error = uiomove(bp->b_data + loff, n, uio);
1129                 kflags |= NOTE_WRITE;
1130                 modified = 1;
1131                 if (error) {
1132                         brelse(bp);
1133                         break;
1134                 }
1135
1136                 /*
1137                  * WARNING: Pageout daemon will issue UIO_NOCOPY writes
1138                  *          with IO_SYNC or IO_ASYNC set.  These writes
1139                  *          must be handled as the pageout daemon expects.
1140                  */
1141                 if (ioflag & IO_SYNC) {
1142                         bwrite(bp);
1143                 } else if ((ioflag & IO_DIRECT) && endofblk) {
1144                         bawrite(bp);
1145                 } else if (ioflag & IO_ASYNC) {
1146                         bawrite(bp);
1147                 } else {
1148                         bdwrite(bp);
1149                 }
1150         }
1151
1152         /*
1153          * Cleanup.  If we extended the file EOF but failed to write through
1154          * the entire write is a failure and we have to back-up.
1155          */
1156         if (error && new_eof != old_eof) {
1157                 hammer2_truncate_file(ip, old_eof);
1158         } else if (modified) {
1159                 hammer2_mtx_ex(&ip->lock);
1160                 hammer2_update_time(&ip->mtime);
1161                 atomic_set_int(&ip->flags, HAMMER2_INODE_MTIME);
1162                 hammer2_mtx_unlock(&ip->lock);
1163         }
1164         atomic_set_int(&ip->flags, HAMMER2_INODE_MODIFIED);
1165         hammer2_knote(ip->vp, kflags);
1166         vsetisdirty(ip->vp);
1167         hammer2_trans_assert_strategy(ip->pmp);
1168
1169         return error;
1170 }
1171
1172 /*
1173  * Truncate the size of a file.  The inode must not be locked.
1174  *
1175  * NOTE:    Caller handles setting HAMMER2_INODE_MODIFIED
1176  *
1177  * WARNING: nvtruncbuf() can only be safely called without the inode lock
1178  *          held due to the way our write thread works.
1179  *
1180  * WARNING! Assumes that the kernel interlocks size changes at the
1181  *          vnode level.
1182  */
1183 static
1184 void
1185 hammer2_truncate_file(hammer2_inode_t *ip, hammer2_key_t nsize)
1186 {
1187         hammer2_key_t lbase;
1188         int nblksize;
1189
1190         LOCKSTART;
1191         if (ip->vp) {
1192                 nblksize = hammer2_calc_logical(ip, nsize, &lbase, NULL);
1193                 nvtruncbuf(ip->vp, nsize,
1194                            nblksize, (int)nsize & (nblksize - 1),
1195                            0);
1196         }
1197         hammer2_mtx_ex(&ip->lock);
1198         ip->size = nsize;
1199         atomic_set_int(&ip->flags, HAMMER2_INODE_RESIZED);
1200         hammer2_mtx_unlock(&ip->lock);
1201         LOCKSTOP;
1202 }
1203
1204 /*
1205  * Extend the size of a file.  The inode must not be locked.
1206  *
1207  * WARNING! Assumes that the kernel interlocks size changes at the
1208  *          vnode level.
1209  *
1210  * NOTE: Caller handles setting HAMMER2_INODE_MODIFIED
1211  */
1212 static
1213 void
1214 hammer2_extend_file(hammer2_inode_t *ip, hammer2_key_t nsize)
1215 {
1216         hammer2_key_t lbase;
1217         hammer2_key_t osize;
1218         int oblksize;
1219         int nblksize;
1220
1221         LOCKSTART;
1222         hammer2_mtx_ex(&ip->lock);
1223         osize = ip->size;
1224         ip->size = nsize;
1225         hammer2_mtx_unlock(&ip->lock);
1226
1227         if (ip->vp) {
1228                 oblksize = hammer2_calc_logical(ip, osize, &lbase, NULL);
1229                 nblksize = hammer2_calc_logical(ip, nsize, &lbase, NULL);
1230                 nvextendbuf(ip->vp,
1231                             osize, nsize,
1232                             oblksize, nblksize,
1233                             -1, -1, 0);
1234         }
1235         atomic_set_int(&ip->flags, HAMMER2_INODE_RESIZED);
1236         LOCKSTOP;
1237 }
1238
1239 static
1240 int
1241 hammer2_vop_nresolve(struct vop_nresolve_args *ap)
1242 {
1243         hammer2_inode_t *ip;
1244         hammer2_inode_t *dip;
1245         hammer2_cluster_t *cparent;
1246         hammer2_cluster_t *cluster;
1247         const hammer2_inode_data_t *ripdata;
1248         hammer2_key_t key_next;
1249         hammer2_key_t lhc;
1250         struct namecache *ncp;
1251         const uint8_t *name;
1252         size_t name_len;
1253         int error = 0;
1254         struct vnode *vp;
1255
1256         LOCKSTART;
1257         dip = VTOI(ap->a_dvp);
1258         ncp = ap->a_nch->ncp;
1259         name = ncp->nc_name;
1260         name_len = ncp->nc_nlen;
1261         lhc = hammer2_dirhash(name, name_len);
1262
1263         /*
1264          * Note: In DragonFly the kernel handles '.' and '..'.
1265          */
1266         cparent = hammer2_inode_lock(dip, HAMMER2_RESOLVE_ALWAYS |
1267                                           HAMMER2_RESOLVE_SHARED);
1268
1269         cluster = hammer2_cluster_lookup(cparent, &key_next,
1270                                          lhc, lhc + HAMMER2_DIRHASH_LOMASK,
1271                                          HAMMER2_LOOKUP_SHARED);
1272         while (cluster) {
1273                 if (hammer2_cluster_type(cluster) == HAMMER2_BREF_TYPE_INODE) {
1274                         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
1275                         if (ripdata->name_len == name_len &&
1276                             bcmp(ripdata->filename, name, name_len) == 0) {
1277                                 break;
1278                         }
1279                 }
1280                 cluster = hammer2_cluster_next(cparent, cluster, &key_next,
1281                                                key_next,
1282                                                lhc + HAMMER2_DIRHASH_LOMASK,
1283                                                HAMMER2_LOOKUP_SHARED);
1284         }
1285         hammer2_inode_unlock(dip, cparent);
1286
1287         /*
1288          * Resolve hardlink entries before acquiring the inode.
1289          */
1290         if (cluster) {
1291                 ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
1292                 if (ripdata->type == HAMMER2_OBJTYPE_HARDLINK) {
1293                         hammer2_tid_t inum = ripdata->inum;
1294                         error = hammer2_hardlink_find(dip, NULL, &cluster);
1295                         if (error) {
1296                                 kprintf("hammer2: unable to find hardlink "
1297                                         "0x%016jx\n", inum);
1298                                 LOCKSTOP;
1299
1300                                 return error;
1301                         }
1302                 }
1303         }
1304
1305         /*
1306          * nresolve needs to resolve hardlinks, the original cluster is not
1307          * sufficient.
1308          */
1309         if (cluster) {
1310                 ip = hammer2_inode_get(dip->pmp, dip, cluster);
1311                 ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
1312                 if (ripdata->type == HAMMER2_OBJTYPE_HARDLINK) {
1313                         kprintf("nresolve: fixup hardlink\n");
1314                         hammer2_inode_ref(ip);
1315                         hammer2_inode_unlock(ip, NULL);
1316                         hammer2_cluster_unlock(cluster);
1317                         hammer2_cluster_drop(cluster);
1318                         cluster = hammer2_inode_lock(ip,
1319                                                      HAMMER2_RESOLVE_ALWAYS);
1320                         ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
1321                         hammer2_inode_drop(ip);
1322                         kprintf("nresolve: fixup to type %02x\n",
1323                                 ripdata->type);
1324                 }
1325         } else {
1326                 ip = NULL;
1327         }
1328
1329 #if 0
1330         /*
1331          * Deconsolidate any hardlink whos nlinks == 1.  Ignore errors.
1332          * If an error occurs chain and ip are left alone.
1333          *
1334          * XXX upgrade shared lock?
1335          */
1336         if (ochain && chain &&
1337             chain->data->ipdata.nlinks == 1 && !dip->pmp->ronly) {
1338                 kprintf("hammer2: need to unconsolidate hardlink for %s\n",
1339                         chain->data->ipdata.filename);
1340                 /* XXX retain shared lock on dip? (currently not held) */
1341                 hammer2_trans_init(&trans, dip->pmp, 0);
1342                 hammer2_hardlink_deconsolidate(&trans, dip, &chain, &ochain);
1343                 hammer2_trans_done(&trans);
1344         }
1345 #endif
1346
1347         /*
1348          * Acquire the related vnode
1349          *
1350          * NOTE: For error processing, only ENOENT resolves the namecache
1351          *       entry to NULL, otherwise we just return the error and
1352          *       leave the namecache unresolved.
1353          *
1354          * NOTE: multiple hammer2_inode structures can be aliased to the
1355          *       same chain element, for example for hardlinks.  This
1356          *       use case does not 'reattach' inode associations that
1357          *       might already exist, but always allocates a new one.
1358          *
1359          * WARNING: inode structure is locked exclusively via inode_get
1360          *          but chain was locked shared.  inode_unlock()
1361          *          will handle it properly.
1362          */
1363         if (cluster) {
1364                 vp = hammer2_igetv(ip, cluster, &error);
1365                 if (error == 0) {
1366                         vn_unlock(vp);
1367                         cache_setvp(ap->a_nch, vp);
1368                 } else if (error == ENOENT) {
1369                         cache_setvp(ap->a_nch, NULL);
1370                 }
1371                 hammer2_inode_unlock(ip, cluster);
1372
1373                 /*
1374                  * The vp should not be released until after we've disposed
1375                  * of our locks, because it might cause vop_inactive() to
1376                  * be called.
1377                  */
1378                 if (vp)
1379                         vrele(vp);
1380         } else {
1381                 error = ENOENT;
1382                 cache_setvp(ap->a_nch, NULL);
1383         }
1384         KASSERT(error || ap->a_nch->ncp->nc_vp != NULL,
1385                 ("resolve error %d/%p ap %p\n",
1386                  error, ap->a_nch->ncp->nc_vp, ap));
1387         LOCKSTOP;
1388         return error;
1389 }
1390
1391 static
1392 int
1393 hammer2_vop_nlookupdotdot(struct vop_nlookupdotdot_args *ap)
1394 {
1395         hammer2_inode_t *dip;
1396         hammer2_inode_t *ip;
1397         hammer2_cluster_t *cparent;
1398         int error;
1399
1400         LOCKSTART;
1401         dip = VTOI(ap->a_dvp);
1402
1403         if ((ip = dip->pip) == NULL) {
1404                 *ap->a_vpp = NULL;
1405                 LOCKSTOP;
1406                 return ENOENT;
1407         }
1408         cparent = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS);
1409         *ap->a_vpp = hammer2_igetv(ip, cparent, &error);
1410         hammer2_inode_unlock(ip, cparent);
1411
1412         LOCKSTOP;
1413         return error;
1414 }
1415
1416 static
1417 int
1418 hammer2_vop_nmkdir(struct vop_nmkdir_args *ap)
1419 {
1420         hammer2_inode_t *dip;
1421         hammer2_inode_t *nip;
1422         hammer2_trans_t trans;
1423         hammer2_cluster_t *cluster;
1424         struct namecache *ncp;
1425         const uint8_t *name;
1426         size_t name_len;
1427         int error;
1428
1429         LOCKSTART;
1430         dip = VTOI(ap->a_dvp);
1431         if (dip->pmp->ronly) {
1432                 LOCKSTOP;
1433                 return (EROFS);
1434         }
1435
1436         ncp = ap->a_nch->ncp;
1437         name = ncp->nc_name;
1438         name_len = ncp->nc_nlen;
1439         cluster = NULL;
1440
1441         hammer2_pfs_memory_wait(dip->pmp);
1442         hammer2_trans_init(&trans, dip->pmp, HAMMER2_TRANS_NEWINODE);
1443         nip = hammer2_inode_create(&trans, dip, ap->a_vap, ap->a_cred,
1444                                    name, name_len,
1445                                    &cluster, 0, &error);
1446         if (error) {
1447                 KKASSERT(nip == NULL);
1448                 *ap->a_vpp = NULL;
1449         } else {
1450                 *ap->a_vpp = hammer2_igetv(nip, cluster, &error);
1451                 hammer2_inode_unlock(nip, cluster);
1452         }
1453         hammer2_trans_done(&trans);
1454
1455         if (error == 0) {
1456                 cache_setunresolved(ap->a_nch);
1457                 cache_setvp(ap->a_nch, *ap->a_vpp);
1458         }
1459         LOCKSTOP;
1460         return error;
1461 }
1462
1463 /*
1464  * Return the largest contiguous physical disk range for the logical
1465  * request, in bytes.
1466  *
1467  * (struct vnode *vp, off_t loffset, off_t *doffsetp, int *runp, int *runb)
1468  *
1469  * Basically disabled, the logical buffer write thread has to deal with
1470  * buffers one-at-a-time.
1471  */
1472 static
1473 int
1474 hammer2_vop_bmap(struct vop_bmap_args *ap)
1475 {
1476         *ap->a_doffsetp = NOOFFSET;
1477         if (ap->a_runp)
1478                 *ap->a_runp = 0;
1479         if (ap->a_runb)
1480                 *ap->a_runb = 0;
1481         return (EOPNOTSUPP);
1482 }
1483
1484 static
1485 int
1486 hammer2_vop_open(struct vop_open_args *ap)
1487 {
1488         return vop_stdopen(ap);
1489 }
1490
1491 /*
1492  * hammer2_vop_advlock { vp, id, op, fl, flags }
1493  */
1494 static
1495 int
1496 hammer2_vop_advlock(struct vop_advlock_args *ap)
1497 {
1498         hammer2_inode_t *ip = VTOI(ap->a_vp);
1499         const hammer2_inode_data_t *ripdata;
1500         hammer2_cluster_t *cparent;
1501         hammer2_off_t size;
1502
1503         cparent = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS |
1504                                          HAMMER2_RESOLVE_SHARED);
1505         ripdata = &hammer2_cluster_rdata(cparent)->ipdata;
1506         size = ripdata->size;
1507         hammer2_inode_unlock(ip, cparent);
1508         return (lf_advlock(ap, &ip->advlock, size));
1509 }
1510
1511
1512 static
1513 int
1514 hammer2_vop_close(struct vop_close_args *ap)
1515 {
1516         return vop_stdclose(ap);
1517 }
1518
1519 /*
1520  * hammer2_vop_nlink { nch, dvp, vp, cred }
1521  *
1522  * Create a hardlink from (vp) to {dvp, nch}.
1523  */
1524 static
1525 int
1526 hammer2_vop_nlink(struct vop_nlink_args *ap)
1527 {
1528         hammer2_inode_t *fdip;  /* target directory to create link in */
1529         hammer2_inode_t *tdip;  /* target directory to create link in */
1530         hammer2_inode_t *cdip;  /* common parent directory */
1531         hammer2_inode_t *ip;    /* inode we are hardlinking to */
1532         hammer2_cluster_t *cluster;
1533         hammer2_cluster_t *fdcluster;
1534         hammer2_cluster_t *tdcluster;
1535         hammer2_cluster_t *cdcluster;
1536         hammer2_trans_t trans;
1537         struct namecache *ncp;
1538         const uint8_t *name;
1539         size_t name_len;
1540         int error;
1541
1542         LOCKSTART;
1543         tdip = VTOI(ap->a_dvp);
1544         if (tdip->pmp->ronly) {
1545                 LOCKSTOP;
1546                 return (EROFS);
1547         }
1548
1549         ncp = ap->a_nch->ncp;
1550         name = ncp->nc_name;
1551         name_len = ncp->nc_nlen;
1552
1553         /*
1554          * ip represents the file being hardlinked.  The file could be a
1555          * normal file or a hardlink target if it has already been hardlinked.
1556          * If ip is a hardlinked target then ip->pip represents the location
1557          * of the hardlinked target, NOT the location of the hardlink pointer.
1558          *
1559          * Bump nlinks and potentially also create or move the hardlink
1560          * target in the parent directory common to (ip) and (tdip).  The
1561          * consolidation code can modify ip->cluster and ip->pip.  The
1562          * returned cluster is locked.
1563          */
1564         ip = VTOI(ap->a_vp);
1565         hammer2_pfs_memory_wait(ip->pmp);
1566         hammer2_trans_init(&trans, ip->pmp, HAMMER2_TRANS_NEWINODE);
1567
1568         /*
1569          * The common parent directory must be locked first to avoid deadlocks.
1570          * Also note that fdip and/or tdip might match cdip.
1571          */
1572         fdip = ip->pip;
1573         cdip = hammer2_inode_common_parent(fdip, tdip);
1574         cdcluster = hammer2_inode_lock(cdip, HAMMER2_RESOLVE_ALWAYS);
1575         fdcluster = hammer2_inode_lock(fdip, HAMMER2_RESOLVE_ALWAYS);
1576         tdcluster = hammer2_inode_lock(tdip, HAMMER2_RESOLVE_ALWAYS);
1577         cluster = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS);
1578         error = hammer2_hardlink_consolidate(&trans, ip, &cluster,
1579                                              cdip, cdcluster, 1);
1580         if (error)
1581                 goto done;
1582
1583         /*
1584          * Create a directory entry connected to the specified cluster.
1585          *
1586          * WARNING! chain can get moved by the connect (indirectly due to
1587          *          potential indirect block creation).
1588          */
1589         error = hammer2_inode_connect(&trans, &cluster, 1,
1590                                       tdip, tdcluster,
1591                                       name, name_len, 0);
1592         if (error == 0) {
1593                 cache_setunresolved(ap->a_nch);
1594                 cache_setvp(ap->a_nch, ap->a_vp);
1595         }
1596 done:
1597         hammer2_inode_unlock(ip, cluster);
1598         hammer2_inode_unlock(tdip, tdcluster);
1599         hammer2_inode_unlock(fdip, fdcluster);
1600         hammer2_inode_unlock(cdip, cdcluster);
1601         hammer2_inode_drop(cdip);
1602         hammer2_trans_done(&trans);
1603
1604         LOCKSTOP;
1605         return error;
1606 }
1607
1608 /*
1609  * hammer2_vop_ncreate { nch, dvp, vpp, cred, vap }
1610  *
1611  * The operating system has already ensured that the directory entry
1612  * does not exist and done all appropriate namespace locking.
1613  */
1614 static
1615 int
1616 hammer2_vop_ncreate(struct vop_ncreate_args *ap)
1617 {
1618         hammer2_inode_t *dip;
1619         hammer2_inode_t *nip;
1620         hammer2_trans_t trans;
1621         hammer2_cluster_t *ncluster;
1622         struct namecache *ncp;
1623         const uint8_t *name;
1624         size_t name_len;
1625         int error;
1626
1627         LOCKSTART;
1628         dip = VTOI(ap->a_dvp);
1629         if (dip->pmp->ronly) {
1630                 LOCKSTOP;
1631                 return (EROFS);
1632         }
1633
1634         ncp = ap->a_nch->ncp;
1635         name = ncp->nc_name;
1636         name_len = ncp->nc_nlen;
1637         hammer2_pfs_memory_wait(dip->pmp);
1638         hammer2_trans_init(&trans, dip->pmp, HAMMER2_TRANS_NEWINODE);
1639         ncluster = NULL;
1640
1641         nip = hammer2_inode_create(&trans, dip, ap->a_vap, ap->a_cred,
1642                                    name, name_len,
1643                                    &ncluster, 0, &error);
1644         if (error) {
1645                 KKASSERT(nip == NULL);
1646                 *ap->a_vpp = NULL;
1647         } else {
1648                 *ap->a_vpp = hammer2_igetv(nip, ncluster, &error);
1649                 hammer2_inode_unlock(nip, ncluster);
1650         }
1651         hammer2_trans_done(&trans);
1652
1653         if (error == 0) {
1654                 cache_setunresolved(ap->a_nch);
1655                 cache_setvp(ap->a_nch, *ap->a_vpp);
1656         }
1657         LOCKSTOP;
1658         return error;
1659 }
1660
1661 /*
1662  * Make a device node (typically a fifo)
1663  */
1664 static
1665 int
1666 hammer2_vop_nmknod(struct vop_nmknod_args *ap)
1667 {
1668         hammer2_inode_t *dip;
1669         hammer2_inode_t *nip;
1670         hammer2_trans_t trans;
1671         hammer2_cluster_t *ncluster;
1672         struct namecache *ncp;
1673         const uint8_t *name;
1674         size_t name_len;
1675         int error;
1676
1677         LOCKSTART;
1678         dip = VTOI(ap->a_dvp);
1679         if (dip->pmp->ronly) {
1680                 LOCKSTOP;
1681                 return (EROFS);
1682         }
1683
1684         ncp = ap->a_nch->ncp;
1685         name = ncp->nc_name;
1686         name_len = ncp->nc_nlen;
1687         hammer2_pfs_memory_wait(dip->pmp);
1688         hammer2_trans_init(&trans, dip->pmp, HAMMER2_TRANS_NEWINODE);
1689         ncluster = NULL;
1690
1691         nip = hammer2_inode_create(&trans, dip, ap->a_vap, ap->a_cred,
1692                                    name, name_len,
1693                                    &ncluster, 0, &error);
1694         if (error) {
1695                 KKASSERT(nip == NULL);
1696                 *ap->a_vpp = NULL;
1697         } else {
1698                 *ap->a_vpp = hammer2_igetv(nip, ncluster, &error);
1699                 hammer2_inode_unlock(nip, ncluster);
1700         }
1701         hammer2_trans_done(&trans);
1702
1703         if (error == 0) {
1704                 cache_setunresolved(ap->a_nch);
1705                 cache_setvp(ap->a_nch, *ap->a_vpp);
1706         }
1707         LOCKSTOP;
1708         return error;
1709 }
1710
1711 /*
1712  * hammer2_vop_nsymlink { nch, dvp, vpp, cred, vap, target }
1713  */
1714 static
1715 int
1716 hammer2_vop_nsymlink(struct vop_nsymlink_args *ap)
1717 {
1718         hammer2_inode_t *dip;
1719         hammer2_inode_t *nip;
1720         hammer2_cluster_t *ncparent;
1721         hammer2_trans_t trans;
1722         struct namecache *ncp;
1723         const uint8_t *name;
1724         size_t name_len;
1725         int error;
1726
1727         dip = VTOI(ap->a_dvp);
1728         if (dip->pmp->ronly)
1729                 return (EROFS);
1730
1731         ncp = ap->a_nch->ncp;
1732         name = ncp->nc_name;
1733         name_len = ncp->nc_nlen;
1734         hammer2_pfs_memory_wait(dip->pmp);
1735         hammer2_trans_init(&trans, dip->pmp, HAMMER2_TRANS_NEWINODE);
1736         ncparent = NULL;
1737
1738         ap->a_vap->va_type = VLNK;      /* enforce type */
1739
1740         nip = hammer2_inode_create(&trans, dip, ap->a_vap, ap->a_cred,
1741                                    name, name_len,
1742                                    &ncparent, 0, &error);
1743         if (error) {
1744                 KKASSERT(nip == NULL);
1745                 *ap->a_vpp = NULL;
1746                 hammer2_trans_done(&trans);
1747                 return error;
1748         }
1749         *ap->a_vpp = hammer2_igetv(nip, ncparent, &error);
1750
1751         /*
1752          * Build the softlink (~like file data) and finalize the namecache.
1753          */
1754         if (error == 0) {
1755                 size_t bytes;
1756                 struct uio auio;
1757                 struct iovec aiov;
1758                 hammer2_inode_data_t *nipdata;
1759
1760                 nipdata = &hammer2_cluster_wdata(ncparent)->ipdata;
1761                 /* nipdata = &nip->chain->data->ipdata;XXX */
1762                 bytes = strlen(ap->a_target);
1763
1764                 if (bytes <= HAMMER2_EMBEDDED_BYTES) {
1765                         KKASSERT(nipdata->op_flags &
1766                                  HAMMER2_OPFLAG_DIRECTDATA);
1767                         bcopy(ap->a_target, nipdata->u.data, bytes);
1768                         nipdata->size = bytes;
1769                         nip->size = bytes;
1770                         hammer2_cluster_modsync(ncparent);
1771                         hammer2_inode_unlock(nip, ncparent);
1772                         /* nipdata = NULL; not needed */
1773                 } else {
1774                         hammer2_inode_unlock(nip, ncparent);
1775                         /* nipdata = NULL; not needed */
1776                         bzero(&auio, sizeof(auio));
1777                         bzero(&aiov, sizeof(aiov));
1778                         auio.uio_iov = &aiov;
1779                         auio.uio_segflg = UIO_SYSSPACE;
1780                         auio.uio_rw = UIO_WRITE;
1781                         auio.uio_resid = bytes;
1782                         auio.uio_iovcnt = 1;
1783                         auio.uio_td = curthread;
1784                         aiov.iov_base = ap->a_target;
1785                         aiov.iov_len = bytes;
1786                         error = hammer2_write_file(nip, &auio, IO_APPEND, 0);
1787                         /* XXX handle error */
1788                         error = 0;
1789                 }
1790         } else {
1791                 hammer2_inode_unlock(nip, ncparent);
1792         }
1793         hammer2_trans_done(&trans);
1794
1795         /*
1796          * Finalize namecache
1797          */
1798         if (error == 0) {
1799                 cache_setunresolved(ap->a_nch);
1800                 cache_setvp(ap->a_nch, *ap->a_vpp);
1801                 /* hammer2_knote(ap->a_dvp, NOTE_WRITE); */
1802         }
1803         return error;
1804 }
1805
1806 /*
1807  * hammer2_vop_nremove { nch, dvp, cred }
1808  */
1809 static
1810 int
1811 hammer2_vop_nremove(struct vop_nremove_args *ap)
1812 {
1813         hammer2_inode_t *dip;
1814         hammer2_trans_t trans;
1815         struct namecache *ncp;
1816         const uint8_t *name;
1817         size_t name_len;
1818         int error;
1819
1820         LOCKSTART;
1821         dip = VTOI(ap->a_dvp);
1822         if (dip->pmp->ronly) {
1823                 LOCKSTOP;
1824                 return(EROFS);
1825         }
1826
1827         ncp = ap->a_nch->ncp;
1828         name = ncp->nc_name;
1829         name_len = ncp->nc_nlen;
1830
1831         hammer2_pfs_memory_wait(dip->pmp);
1832         hammer2_trans_init(&trans, dip->pmp, 0);
1833         error = hammer2_unlink_file(&trans, dip, name, name_len,
1834                                     0, NULL, ap->a_nch, -1);
1835         hammer2_run_unlinkq(&trans, dip->pmp);
1836         hammer2_trans_done(&trans);
1837         if (error == 0)
1838                 cache_unlink(ap->a_nch);
1839         LOCKSTOP;
1840         return (error);
1841 }
1842
1843 /*
1844  * hammer2_vop_nrmdir { nch, dvp, cred }
1845  */
1846 static
1847 int
1848 hammer2_vop_nrmdir(struct vop_nrmdir_args *ap)
1849 {
1850         hammer2_inode_t *dip;
1851         hammer2_trans_t trans;
1852         struct namecache *ncp;
1853         const uint8_t *name;
1854         size_t name_len;
1855         int error;
1856
1857         LOCKSTART;
1858         dip = VTOI(ap->a_dvp);
1859         if (dip->pmp->ronly) {
1860                 LOCKSTOP;
1861                 return(EROFS);
1862         }
1863
1864         ncp = ap->a_nch->ncp;
1865         name = ncp->nc_name;
1866         name_len = ncp->nc_nlen;
1867
1868         hammer2_pfs_memory_wait(dip->pmp);
1869         hammer2_trans_init(&trans, dip->pmp, 0);
1870         hammer2_run_unlinkq(&trans, dip->pmp);
1871         error = hammer2_unlink_file(&trans, dip, name, name_len,
1872                                     1, NULL, ap->a_nch, -1);
1873         hammer2_trans_done(&trans);
1874         if (error == 0)
1875                 cache_unlink(ap->a_nch);
1876         LOCKSTOP;
1877         return (error);
1878 }
1879
1880 /*
1881  * hammer2_vop_nrename { fnch, tnch, fdvp, tdvp, cred }
1882  */
1883 static
1884 int
1885 hammer2_vop_nrename(struct vop_nrename_args *ap)
1886 {
1887         struct namecache *fncp;
1888         struct namecache *tncp;
1889         hammer2_inode_t *cdip;
1890         hammer2_inode_t *fdip;
1891         hammer2_inode_t *tdip;
1892         hammer2_inode_t *ip;
1893         hammer2_cluster_t *cluster;
1894         hammer2_cluster_t *fdcluster;
1895         hammer2_cluster_t *tdcluster;
1896         hammer2_cluster_t *cdcluster;
1897         hammer2_trans_t trans;
1898         const uint8_t *fname;
1899         size_t fname_len;
1900         const uint8_t *tname;
1901         size_t tname_len;
1902         int error;
1903         int tnch_error;
1904         int hlink;
1905
1906         if (ap->a_fdvp->v_mount != ap->a_tdvp->v_mount)
1907                 return(EXDEV);
1908         if (ap->a_fdvp->v_mount != ap->a_fnch->ncp->nc_vp->v_mount)
1909                 return(EXDEV);
1910
1911         fdip = VTOI(ap->a_fdvp);        /* source directory */
1912         tdip = VTOI(ap->a_tdvp);        /* target directory */
1913
1914         if (fdip->pmp->ronly)
1915                 return(EROFS);
1916
1917         LOCKSTART;
1918         fncp = ap->a_fnch->ncp;         /* entry name in source */
1919         fname = fncp->nc_name;
1920         fname_len = fncp->nc_nlen;
1921
1922         tncp = ap->a_tnch->ncp;         /* entry name in target */
1923         tname = tncp->nc_name;
1924         tname_len = tncp->nc_nlen;
1925
1926         hammer2_pfs_memory_wait(tdip->pmp);
1927         hammer2_trans_init(&trans, tdip->pmp, 0);
1928
1929         /*
1930          * ip is the inode being renamed.  If this is a hardlink then
1931          * ip represents the actual file and not the hardlink marker.
1932          */
1933         ip = VTOI(fncp->nc_vp);
1934         cluster = NULL;
1935
1936
1937         /*
1938          * The common parent directory must be locked first to avoid deadlocks.
1939          * Also note that fdip and/or tdip might match cdip.
1940          *
1941          * WARNING! fdip may not match ip->pip.  That is, if the source file
1942          *          is already a hardlink then what we are renaming is the
1943          *          hardlink pointer, not the hardlink itself.  The hardlink
1944          *          directory (ip->pip) will already be at a common parent
1945          *          of fdrip.
1946          *
1947          *          Be sure to use ip->pip when finding the common parent
1948          *          against tdip or we might accidently move the hardlink
1949          *          target into a subdirectory that makes it inaccessible to
1950          *          other pointers.
1951          */
1952         cdip = hammer2_inode_common_parent(ip->pip, tdip);
1953         cdcluster = hammer2_inode_lock(cdip, HAMMER2_RESOLVE_ALWAYS);
1954         fdcluster = hammer2_inode_lock(fdip, HAMMER2_RESOLVE_ALWAYS);
1955         tdcluster = hammer2_inode_lock(tdip, HAMMER2_RESOLVE_ALWAYS);
1956
1957         /*
1958          * Keep a tight grip on the inode so the temporary unlinking from
1959          * the source location prior to linking to the target location
1960          * does not cause the cluster to be destroyed.
1961          *
1962          * NOTE: To avoid deadlocks we cannot lock (ip) while we are
1963          *       unlinking elements from their directories.  Locking
1964          *       the nlinks field does not lock the whole inode.
1965          */
1966         hammer2_inode_ref(ip);
1967
1968         /*
1969          * Remove target if it exists.
1970          */
1971         error = hammer2_unlink_file(&trans, tdip, tname, tname_len,
1972                                     -1, NULL, ap->a_tnch, -1);
1973         tnch_error = error;
1974         if (error && error != ENOENT)
1975                 goto done;
1976
1977         /*
1978          * When renaming a hardlinked file we may have to re-consolidate
1979          * the location of the hardlink target.
1980          *
1981          * If ip represents a regular file the consolidation code essentially
1982          * does nothing other than return the same locked cluster that was
1983          * passed in.
1984          *
1985          * The returned cluster will be locked.
1986          *
1987          * WARNING!  We do not currently have a local copy of ipdata but
1988          *           we do use one later remember that it must be reloaded
1989          *           on any modification to the inode, including connects.
1990          */
1991         cluster = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS);
1992         error = hammer2_hardlink_consolidate(&trans, ip, &cluster,
1993                                              cdip, cdcluster, 0);
1994         if (error)
1995                 goto done;
1996
1997         /*
1998          * Disconnect (fdip, fname) from the source directory.  This will
1999          * disconnect (ip) if it represents a direct file.  If (ip) represents
2000          * a hardlink the HARDLINK pointer object will be removed but the
2001          * hardlink will stay intact.
2002          *
2003          * Always pass nch as NULL because we intend to reconnect the inode,
2004          * so we don't want hammer2_unlink_file() to rename it to the hidden
2005          * open-but-unlinked directory.
2006          *
2007          * The target cluster may be marked DELETED but will not be destroyed
2008          * since we retain our hold on ip and cluster.
2009          *
2010          * NOTE: We pass nlinks as 0 (not -1) in order to retain the file's
2011          *       link count.
2012          */
2013         error = hammer2_unlink_file(&trans, fdip, fname, fname_len,
2014                                     -1, &hlink, NULL, 0);
2015         KKASSERT(error != EAGAIN);
2016         if (error)
2017                 goto done;
2018
2019         /*
2020          * Reconnect ip to target directory using cluster.  Chains cannot
2021          * actually be moved, so this will duplicate the cluster in the new
2022          * spot and assign it to the ip, replacing the old cluster.
2023          *
2024          * WARNING: Because recursive locks are allowed and we unlinked the
2025          *          file that we have a cluster-in-hand for just above, the
2026          *          cluster might have been delete-duplicated.  We must
2027          *          refactor the cluster.
2028          *
2029          * WARNING: Chain locks can lock buffer cache buffers, to avoid
2030          *          deadlocks we want to unlock before issuing a cache_*()
2031          *          op (that might have to lock a vnode).
2032          *
2033          * NOTE:    Pass nlinks as 0 because we retained the link count from
2034          *          the unlink, so we do not have to modify it.
2035          */
2036         error = hammer2_inode_connect(&trans, &cluster, hlink,
2037                                       tdip, tdcluster,
2038                                       tname, tname_len, 0);
2039         if (error == 0) {
2040                 KKASSERT(cluster != NULL);
2041                 hammer2_inode_repoint(ip, (hlink ? ip->pip : tdip), cluster);
2042         }
2043 done:
2044         hammer2_inode_unlock(ip, cluster);
2045         hammer2_inode_unlock(tdip, tdcluster);
2046         hammer2_inode_unlock(fdip, fdcluster);
2047         hammer2_inode_unlock(cdip, cdcluster);
2048         hammer2_inode_drop(ip);
2049         hammer2_inode_drop(cdip);
2050         hammer2_run_unlinkq(&trans, fdip->pmp);
2051         hammer2_trans_done(&trans);
2052
2053         /*
2054          * Issue the namecache update after unlocking all the internal
2055          * hammer structures, otherwise we might deadlock.
2056          */
2057         if (tnch_error == 0) {
2058                 cache_unlink(ap->a_tnch);
2059                 cache_setunresolved(ap->a_tnch);
2060         }
2061         if (error == 0)
2062                 cache_rename(ap->a_fnch, ap->a_tnch);
2063
2064         LOCKSTOP;
2065         return (error);
2066 }
2067
2068 /*
2069  * Strategy code (async logical file buffer I/O from system)
2070  *
2071  * WARNING: The strategy code cannot safely use hammer2 transactions
2072  *          as this can deadlock against vfs_sync's vfsync() call
2073  *          if multiple flushes are queued.  All H2 structures must
2074  *          already be present and ready for the DIO.
2075  *
2076  *          Reads can be initiated asynchronously, writes have to be
2077  *          spooled to a separate thread for action to avoid deadlocks.
2078  */
2079 static int hammer2_strategy_read(struct vop_strategy_args *ap);
2080 static int hammer2_strategy_write(struct vop_strategy_args *ap);
2081 static void hammer2_strategy_read_callback(hammer2_iocb_t *iocb);
2082
2083 static
2084 int
2085 hammer2_vop_strategy(struct vop_strategy_args *ap)
2086 {
2087         struct bio *biop;
2088         struct buf *bp;
2089         int error;
2090
2091         biop = ap->a_bio;
2092         bp = biop->bio_buf;
2093
2094         switch(bp->b_cmd) {
2095         case BUF_CMD_READ:
2096                 error = hammer2_strategy_read(ap);
2097                 ++hammer2_iod_file_read;
2098                 break;
2099         case BUF_CMD_WRITE:
2100                 error = hammer2_strategy_write(ap);
2101                 ++hammer2_iod_file_write;
2102                 break;
2103         default:
2104                 bp->b_error = error = EINVAL;
2105                 bp->b_flags |= B_ERROR;
2106                 biodone(biop);
2107                 break;
2108         }
2109         return (error);
2110 }
2111
2112 /*
2113  * Logical buffer I/O, async read.
2114  */
2115 static
2116 int
2117 hammer2_strategy_read(struct vop_strategy_args *ap)
2118 {
2119         struct buf *bp;
2120         struct bio *bio;
2121         struct bio *nbio;
2122         hammer2_inode_t *ip;
2123         hammer2_cluster_t *cparent;
2124         hammer2_cluster_t *cluster;
2125         hammer2_key_t key_dummy;
2126         hammer2_key_t lbase;
2127         uint8_t btype;
2128
2129         bio = ap->a_bio;
2130         bp = bio->bio_buf;
2131         ip = VTOI(ap->a_vp);
2132         nbio = push_bio(bio);
2133
2134         lbase = bio->bio_offset;
2135         KKASSERT(((int)lbase & HAMMER2_PBUFMASK) == 0);
2136
2137         /*
2138          * Lookup the file offset.
2139          */
2140         cparent = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS |
2141                                          HAMMER2_RESOLVE_SHARED);
2142         cluster = hammer2_cluster_lookup(cparent, &key_dummy,
2143                                        lbase, lbase,
2144                                        HAMMER2_LOOKUP_NODATA |
2145                                        HAMMER2_LOOKUP_SHARED);
2146         hammer2_inode_unlock(ip, cparent);
2147
2148         /*
2149          * Data is zero-fill if no cluster could be found
2150          * (XXX or EIO on a cluster failure).
2151          */
2152         if (cluster == NULL) {
2153                 bp->b_resid = 0;
2154                 bp->b_error = 0;
2155                 bzero(bp->b_data, bp->b_bcount);
2156                 biodone(nbio);
2157                 return(0);
2158         }
2159
2160         /*
2161          * Cluster elements must be type INODE or type DATA, but the
2162          * compression mode (or not) for DATA chains can be different for
2163          * each chain.  This will be handled by the callback.
2164          *
2165          * If the cluster already has valid data the callback will be made
2166          * immediately/synchronously.
2167          */
2168         btype = hammer2_cluster_type(cluster);
2169         if (btype != HAMMER2_BREF_TYPE_INODE &&
2170             btype != HAMMER2_BREF_TYPE_DATA) {
2171                 panic("READ PATH: hammer2_strategy_read: unknown bref type");
2172         }
2173         hammer2_cluster_load_async(cluster, hammer2_strategy_read_callback,
2174                                    nbio);
2175         return(0);
2176 }
2177
2178 /*
2179  * Read callback for hammer2_cluster_load_async().  The load function may
2180  * start several actual I/Os but will only make one callback, typically with
2181  * the first valid I/O XXX
2182  */
2183 static
2184 void
2185 hammer2_strategy_read_callback(hammer2_iocb_t *iocb)
2186 {
2187         struct bio *bio = iocb->ptr;    /* original logical buffer */
2188         struct buf *bp = bio->bio_buf;  /* original logical buffer */
2189         hammer2_chain_t *chain;
2190         hammer2_cluster_t *cluster;
2191         hammer2_io_t *dio;
2192         char *data;
2193         int i;
2194
2195         /*
2196          * Extract data and handle iteration on I/O failure.  iocb->off
2197          * is the cluster index for iteration.
2198          */
2199         cluster = iocb->cluster;
2200         dio = iocb->dio;        /* can be NULL if iocb not in progress */
2201
2202         /*
2203          * Work to do if INPROG set, else dio is already good or dio is
2204          * NULL (which is the shortcut case if chain->data is already good).
2205          */
2206         if (iocb->flags & HAMMER2_IOCB_INPROG) {
2207                 /*
2208                  * Read attempt not yet made.  Issue an asynchronous read
2209                  * if necessary and return, operation will chain back to
2210                  * this function.
2211                  */
2212                 if ((iocb->flags & HAMMER2_IOCB_READ) == 0) {
2213                         if (dio->bp == NULL ||
2214                             (dio->bp->b_flags & B_CACHE) == 0) {
2215                                 if (dio->bp) {
2216                                         bqrelse(dio->bp);
2217                                         dio->bp = NULL;
2218                                 }
2219                                 iocb->flags |= HAMMER2_IOCB_READ;
2220                                 breadcb(dio->hmp->devvp,
2221                                         dio->pbase, dio->psize,
2222                                         hammer2_io_callback, iocb);
2223                                 return;
2224                         }
2225                 }
2226         }
2227
2228         /*
2229          * If we have a DIO it is now done, check for an error and
2230          * calculate the data.
2231          *
2232          * If there is no DIO it is an optimization by
2233          * hammer2_cluster_load_async(), the data is available in
2234          * chain->data.
2235          */
2236         if (dio) {
2237                 if (dio->bp->b_flags & B_ERROR) {
2238                         i = (int)iocb->lbase + 1;
2239                         if (i >= cluster->nchains) {
2240                                 bp->b_flags |= B_ERROR;
2241                                 bp->b_error = dio->bp->b_error;
2242                                 hammer2_io_complete(iocb);
2243                                 biodone(bio);
2244                                 hammer2_cluster_unlock(cluster);
2245                                 hammer2_cluster_drop(cluster);
2246                         } else {
2247                                 hammer2_io_complete(iocb); /* XXX */
2248                                 chain = cluster->array[i].chain;
2249                                 kprintf("hammer2: IO CHAIN-%d %p\n", i, chain);
2250                                 hammer2_adjreadcounter(&chain->bref,
2251                                                        chain->bytes);
2252                                 iocb->chain = chain;
2253                                 iocb->lbase = (off_t)i;
2254                                 iocb->flags = 0;
2255                                 iocb->error = 0;
2256                                 hammer2_io_getblk(chain->hmp,
2257                                                   chain->bref.data_off,
2258                                                   chain->bytes,
2259                                                   iocb);
2260                         }
2261                         return;
2262                 }
2263                 chain = iocb->chain;
2264                 data = hammer2_io_data(dio, chain->bref.data_off);
2265         } else {
2266                 /*
2267                  * Special synchronous case, data present in chain->data.
2268                  */
2269                 chain = iocb->chain;
2270                 data = (void *)chain->data;
2271         }
2272
2273         if (chain->bref.type == HAMMER2_BREF_TYPE_INODE) {
2274                 /*
2275                  * Data is embedded in the inode (copy from inode).
2276                  */
2277                 bcopy(((hammer2_inode_data_t *)data)->u.data,
2278                       bp->b_data, HAMMER2_EMBEDDED_BYTES);
2279                 bzero(bp->b_data + HAMMER2_EMBEDDED_BYTES,
2280                       bp->b_bcount - HAMMER2_EMBEDDED_BYTES);
2281                 bp->b_resid = 0;
2282                 bp->b_error = 0;
2283         } else if (chain->bref.type == HAMMER2_BREF_TYPE_DATA) {
2284                 /*
2285                  * Data is on-media, issue device I/O and copy.
2286                  *
2287                  * XXX direct-IO shortcut could go here XXX.
2288                  */
2289                 switch (HAMMER2_DEC_COMP(chain->bref.methods)) {
2290                 case HAMMER2_COMP_LZ4:
2291                         hammer2_decompress_LZ4_callback(data, chain->bytes,
2292                                                         bio);
2293                         break;
2294                 case HAMMER2_COMP_ZLIB:
2295                         hammer2_decompress_ZLIB_callback(data, chain->bytes,
2296                                                          bio);
2297                         break;
2298                 case HAMMER2_COMP_NONE:
2299                         KKASSERT(chain->bytes <= bp->b_bcount);
2300                         bcopy(data, bp->b_data, chain->bytes);
2301                         if (chain->bytes < bp->b_bcount) {
2302                                 bzero(bp->b_data + chain->bytes,
2303                                       bp->b_bcount - chain->bytes);
2304                         }
2305                         bp->b_flags |= B_NOTMETA;
2306                         bp->b_resid = 0;
2307                         bp->b_error = 0;
2308                         break;
2309                 default:
2310                         panic("hammer2_strategy_read: "
2311                               "unknown compression type");
2312                 }
2313         } else {
2314                 /* bqrelse the dio to help stabilize the call to panic() */
2315                 if (dio)
2316                         hammer2_io_bqrelse(&dio);
2317                 panic("hammer2_strategy_read: unknown bref type");
2318         }
2319
2320         /*
2321          * Once the iocb is cleaned up the DIO (if any) will no longer be
2322          * in-progress but will still have a ref.  Be sure to release
2323          * the ref.
2324          */
2325         hammer2_io_complete(iocb);              /* physical management */
2326         if (dio)                                /* physical dio & buffer */
2327                 hammer2_io_bqrelse(&dio);
2328         hammer2_cluster_unlock(cluster);        /* cluster management */
2329         hammer2_cluster_drop(cluster);          /* cluster management */
2330         biodone(bio);                           /* logical buffer */
2331 }
2332
2333 static
2334 int
2335 hammer2_strategy_write(struct vop_strategy_args *ap)
2336 {
2337         hammer2_pfs_t *pmp;
2338         struct bio *bio;
2339         struct buf *bp;
2340         hammer2_inode_t *ip;
2341
2342         bio = ap->a_bio;
2343         bp = bio->bio_buf;
2344         ip = VTOI(ap->a_vp);
2345         pmp = ip->pmp;
2346
2347         hammer2_lwinprog_ref(pmp);
2348         hammer2_trans_assert_strategy(pmp);
2349         hammer2_mtx_ex(&pmp->wthread_mtx);
2350         if (TAILQ_EMPTY(&pmp->wthread_bioq.queue)) {
2351                 bioq_insert_tail(&pmp->wthread_bioq, ap->a_bio);
2352                 hammer2_mtx_unlock(&pmp->wthread_mtx);
2353                 wakeup(&pmp->wthread_bioq);
2354         } else {
2355                 bioq_insert_tail(&pmp->wthread_bioq, ap->a_bio);
2356                 hammer2_mtx_unlock(&pmp->wthread_mtx);
2357         }
2358         hammer2_lwinprog_wait(pmp);
2359
2360         return(0);
2361 }
2362
2363 /*
2364  * hammer2_vop_ioctl { vp, command, data, fflag, cred }
2365  */
2366 static
2367 int
2368 hammer2_vop_ioctl(struct vop_ioctl_args *ap)
2369 {
2370         hammer2_inode_t *ip;
2371         int error;
2372
2373         LOCKSTART;
2374         ip = VTOI(ap->a_vp);
2375
2376         error = hammer2_ioctl(ip, ap->a_command, (void *)ap->a_data,
2377                               ap->a_fflag, ap->a_cred);
2378         LOCKSTOP;
2379         return (error);
2380 }
2381
2382 static
2383 int
2384 hammer2_vop_mountctl(struct vop_mountctl_args *ap)
2385 {
2386         struct mount *mp;
2387         hammer2_pfs_t *pmp;
2388         int rc;
2389
2390         LOCKSTART;
2391         switch (ap->a_op) {
2392         case (MOUNTCTL_SET_EXPORT):
2393                 mp = ap->a_head.a_ops->head.vv_mount;
2394                 pmp = MPTOPMP(mp);
2395
2396                 if (ap->a_ctllen != sizeof(struct export_args))
2397                         rc = (EINVAL);
2398                 else
2399                         rc = vfs_export(mp, &pmp->export,
2400                                         (const struct export_args *)ap->a_ctl);
2401                 break;
2402         default:
2403                 rc = vop_stdmountctl(ap);
2404                 break;
2405         }
2406         LOCKSTOP;
2407         return (rc);
2408 }
2409
2410 /*
2411  * This handles unlinked open files after the vnode is finally dereferenced.
2412  * To avoid deadlocks it cannot be called from the normal vnode recycling
2413  * path, so we call it (1) after a unlink, rmdir, or rename, (2) on every
2414  * flush, and (3) on umount.
2415  */
2416 void
2417 hammer2_run_unlinkq(hammer2_trans_t *trans, hammer2_pfs_t *pmp)
2418 {
2419         const hammer2_inode_data_t *ripdata;
2420         hammer2_inode_unlink_t *ipul;
2421         hammer2_inode_t *ip;
2422         hammer2_cluster_t *cluster;
2423         hammer2_cluster_t *cparent;
2424
2425         if (TAILQ_EMPTY(&pmp->unlinkq))
2426                 return;
2427
2428         LOCKSTART;
2429         hammer2_spin_ex(&pmp->list_spin);
2430         while ((ipul = TAILQ_FIRST(&pmp->unlinkq)) != NULL) {
2431                 TAILQ_REMOVE(&pmp->unlinkq, ipul, entry);
2432                 hammer2_spin_unex(&pmp->list_spin);
2433                 ip = ipul->ip;
2434                 kfree(ipul, pmp->minode);
2435
2436                 cluster = hammer2_inode_lock(ip, HAMMER2_RESOLVE_ALWAYS);
2437                 ripdata = &hammer2_cluster_rdata(cluster)->ipdata;
2438                 if (hammer2_debug & 0x400) {
2439                         kprintf("hammer2: unlink on reclaim: %s refs=%d\n",
2440                                 ripdata->filename, ip->refs);
2441                 }
2442
2443                 /*
2444                  * NOTE: Due to optimizations to avoid I/O on the inode for
2445                  *       the last unlink, ripdata->nlinks is not necessarily
2446                  *       0 here.
2447                  */
2448                 /* KKASSERT(ripdata->nlinks == 0); (see NOTE) */
2449                 cparent = hammer2_cluster_parent(cluster);
2450                 hammer2_cluster_delete(trans, cparent, cluster,
2451                                        HAMMER2_DELETE_PERMANENT);
2452                 hammer2_cluster_unlock(cparent);
2453                 hammer2_cluster_drop(cparent);
2454                 hammer2_inode_unlock(ip, cluster);      /* inode lock */
2455                 hammer2_inode_drop(ip);                 /* ipul ref */
2456
2457                 hammer2_spin_ex(&pmp->list_spin);
2458         }
2459         hammer2_spin_unex(&pmp->list_spin);
2460         LOCKSTOP;
2461 }
2462
2463
2464 /*
2465  * KQFILTER
2466  */
2467 static void filt_hammer2detach(struct knote *kn);
2468 static int filt_hammer2read(struct knote *kn, long hint);
2469 static int filt_hammer2write(struct knote *kn, long hint);
2470 static int filt_hammer2vnode(struct knote *kn, long hint);
2471
2472 static struct filterops hammer2read_filtops =
2473         { FILTEROP_ISFD | FILTEROP_MPSAFE,
2474           NULL, filt_hammer2detach, filt_hammer2read };
2475 static struct filterops hammer2write_filtops =
2476         { FILTEROP_ISFD | FILTEROP_MPSAFE,
2477           NULL, filt_hammer2detach, filt_hammer2write };
2478 static struct filterops hammer2vnode_filtops =
2479         { FILTEROP_ISFD | FILTEROP_MPSAFE,
2480           NULL, filt_hammer2detach, filt_hammer2vnode };
2481
2482 static
2483 int
2484 hammer2_vop_kqfilter(struct vop_kqfilter_args *ap)
2485 {
2486         struct vnode *vp = ap->a_vp;
2487         struct knote *kn = ap->a_kn;
2488
2489         switch (kn->kn_filter) {
2490         case EVFILT_READ:
2491                 kn->kn_fop = &hammer2read_filtops;
2492                 break;
2493         case EVFILT_WRITE:
2494                 kn->kn_fop = &hammer2write_filtops;
2495                 break;
2496         case EVFILT_VNODE:
2497                 kn->kn_fop = &hammer2vnode_filtops;
2498                 break;
2499         default:
2500                 return (EOPNOTSUPP);
2501         }
2502
2503         kn->kn_hook = (caddr_t)vp;
2504
2505         knote_insert(&vp->v_pollinfo.vpi_kqinfo.ki_note, kn);
2506
2507         return(0);
2508 }
2509
2510 static void
2511 filt_hammer2detach(struct knote *kn)
2512 {
2513         struct vnode *vp = (void *)kn->kn_hook;
2514
2515         knote_remove(&vp->v_pollinfo.vpi_kqinfo.ki_note, kn);
2516 }
2517
2518 static int
2519 filt_hammer2read(struct knote *kn, long hint)
2520 {
2521         struct vnode *vp = (void *)kn->kn_hook;
2522         hammer2_inode_t *ip = VTOI(vp);
2523         off_t off;
2524
2525         if (hint == NOTE_REVOKE) {
2526                 kn->kn_flags |= (EV_EOF | EV_NODATA | EV_ONESHOT);
2527                 return(1);
2528         }
2529         off = ip->size - kn->kn_fp->f_offset;
2530         kn->kn_data = (off < INTPTR_MAX) ? off : INTPTR_MAX;
2531         if (kn->kn_sfflags & NOTE_OLDAPI)
2532                 return(1);
2533         return (kn->kn_data != 0);
2534 }
2535
2536
2537 static int
2538 filt_hammer2write(struct knote *kn, long hint)
2539 {
2540         if (hint == NOTE_REVOKE)
2541                 kn->kn_flags |= (EV_EOF | EV_NODATA | EV_ONESHOT);
2542         kn->kn_data = 0;
2543         return (1);
2544 }
2545
2546 static int
2547 filt_hammer2vnode(struct knote *kn, long hint)
2548 {
2549         if (kn->kn_sfflags & hint)
2550                 kn->kn_fflags |= hint;
2551         if (hint == NOTE_REVOKE) {
2552                 kn->kn_flags |= (EV_EOF | EV_NODATA);
2553                 return (1);
2554         }
2555         return (kn->kn_fflags != 0);
2556 }
2557
2558 /*
2559  * FIFO VOPS
2560  */
2561 static
2562 int
2563 hammer2_vop_markatime(struct vop_markatime_args *ap)
2564 {
2565         hammer2_inode_t *ip;
2566         struct vnode *vp;
2567
2568         vp = ap->a_vp;
2569         ip = VTOI(vp);
2570
2571         if (ip->pmp->ronly)
2572                 return(EROFS);
2573         return(0);
2574 }
2575
2576 static
2577 int
2578 hammer2_vop_fifokqfilter(struct vop_kqfilter_args *ap)
2579 {
2580         int error;
2581
2582         error = VOCALL(&fifo_vnode_vops, &ap->a_head);
2583         if (error)
2584                 error = hammer2_vop_kqfilter(ap);
2585         return(error);
2586 }
2587
2588 /*
2589  * VOPS vector
2590  */
2591 struct vop_ops hammer2_vnode_vops = {
2592         .vop_default    = vop_defaultop,
2593         .vop_fsync      = hammer2_vop_fsync,
2594         .vop_getpages   = vop_stdgetpages,
2595         .vop_putpages   = vop_stdputpages,
2596         .vop_access     = hammer2_vop_access,
2597         .vop_advlock    = hammer2_vop_advlock,
2598         .vop_close      = hammer2_vop_close,
2599         .vop_nlink      = hammer2_vop_nlink,
2600         .vop_ncreate    = hammer2_vop_ncreate,
2601         .vop_nsymlink   = hammer2_vop_nsymlink,
2602         .vop_nremove    = hammer2_vop_nremove,
2603         .vop_nrmdir     = hammer2_vop_nrmdir,
2604         .vop_nrename    = hammer2_vop_nrename,
2605         .vop_getattr    = hammer2_vop_getattr,
2606         .vop_setattr    = hammer2_vop_setattr,
2607         .vop_readdir    = hammer2_vop_readdir,
2608         .vop_readlink   = hammer2_vop_readlink,
2609         .vop_getpages   = vop_stdgetpages,
2610         .vop_putpages   = vop_stdputpages,
2611         .vop_read       = hammer2_vop_read,
2612         .vop_write      = hammer2_vop_write,
2613         .vop_open       = hammer2_vop_open,
2614         .vop_inactive   = hammer2_vop_inactive,
2615         .vop_reclaim    = hammer2_vop_reclaim,
2616         .vop_nresolve   = hammer2_vop_nresolve,
2617         .vop_nlookupdotdot = hammer2_vop_nlookupdotdot,
2618         .vop_nmkdir     = hammer2_vop_nmkdir,
2619         .vop_nmknod     = hammer2_vop_nmknod,
2620         .vop_ioctl      = hammer2_vop_ioctl,
2621         .vop_mountctl   = hammer2_vop_mountctl,
2622         .vop_bmap       = hammer2_vop_bmap,
2623         .vop_strategy   = hammer2_vop_strategy,
2624         .vop_kqfilter   = hammer2_vop_kqfilter
2625 };
2626
2627 struct vop_ops hammer2_spec_vops = {
2628         .vop_default =          vop_defaultop,
2629         .vop_fsync =            hammer2_vop_fsync,
2630         .vop_read =             vop_stdnoread,
2631         .vop_write =            vop_stdnowrite,
2632         .vop_access =           hammer2_vop_access,
2633         .vop_close =            hammer2_vop_close,
2634         .vop_markatime =        hammer2_vop_markatime,
2635         .vop_getattr =          hammer2_vop_getattr,
2636         .vop_inactive =         hammer2_vop_inactive,
2637         .vop_reclaim =          hammer2_vop_reclaim,
2638         .vop_setattr =          hammer2_vop_setattr
2639 };
2640
2641 struct vop_ops hammer2_fifo_vops = {
2642         .vop_default =          fifo_vnoperate,
2643         .vop_fsync =            hammer2_vop_fsync,
2644 #if 0
2645         .vop_read =             hammer2_vop_fiforead,
2646         .vop_write =            hammer2_vop_fifowrite,
2647 #endif
2648         .vop_access =           hammer2_vop_access,
2649 #if 0
2650         .vop_close =            hammer2_vop_fifoclose,
2651 #endif
2652         .vop_markatime =        hammer2_vop_markatime,
2653         .vop_getattr =          hammer2_vop_getattr,
2654         .vop_inactive =         hammer2_vop_inactive,
2655         .vop_reclaim =          hammer2_vop_reclaim,
2656         .vop_setattr =          hammer2_vop_setattr,
2657         .vop_kqfilter =         hammer2_vop_fifokqfilter
2658 };
2659