sys/vfs/hammer2/hammer2_vfsops.c

   1 /*-
   2  * Copyright (c) 2011, 2012 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@backplane.com>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36 #include <sys/kernel.h>
  37 #include <sys/nlookup.h>
  38 #include <sys/vnode.h>
  39 #include <sys/mount.h>
  40 #include <sys/fcntl.h>
  41 #include <sys/buf.h>
  42 #include <sys/uuid.h>
  43 #include <sys/vfsops.h>
  44 #include <sys/sysctl.h>
  45 #include <sys/socket.h>
  46
  47 #include "hammer2.h"
  48 #include "hammer2_disk.h"
  49 #include "hammer2_mount.h"
  50
  51 struct hammer2_sync_info {
  52         int error;
  53         int waitfor;
  54 };
  55
  56 TAILQ_HEAD(hammer2_mntlist, hammer2_mount);
  57 static struct hammer2_mntlist hammer2_mntlist;
  58 static struct lock hammer2_mntlk;
  59
  60 int hammer2_debug;
  61 int hammer2_cluster_enable = 1;
  62 int hammer2_hardlink_enable = 1;
  63 long hammer2_iod_file_read;
  64 long hammer2_iod_meta_read;
  65 long hammer2_iod_indr_read;
  66 long hammer2_iod_file_write;
  67 long hammer2_iod_meta_write;
  68 long hammer2_iod_indr_write;
  69 long hammer2_iod_volu_write;
  70 long hammer2_ioa_file_read;
  71 long hammer2_ioa_meta_read;
  72 long hammer2_ioa_indr_read;
  73 long hammer2_ioa_file_write;
  74 long hammer2_ioa_meta_write;
  75 long hammer2_ioa_indr_write;
  76 long hammer2_ioa_volu_write;
  77
  78 SYSCTL_NODE(_vfs, OID_AUTO, hammer2, CTLFLAG_RW, 0, "HAMMER2 filesystem");
  79
  80 SYSCTL_INT(_vfs_hammer2, OID_AUTO, debug, CTLFLAG_RW,
  81            &hammer2_debug, 0, "");
  82 SYSCTL_INT(_vfs_hammer2, OID_AUTO, cluster_enable, CTLFLAG_RW,
  83            &hammer2_cluster_enable, 0, "");
  84 SYSCTL_INT(_vfs_hammer2, OID_AUTO, hardlink_enable, CTLFLAG_RW,
  85            &hammer2_hardlink_enable, 0, "");
  86 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_read, CTLFLAG_RW,
  87            &hammer2_iod_file_read, 0, "");
  88 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_meta_read, CTLFLAG_RW,
  89            &hammer2_iod_meta_read, 0, "");
  90 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_indr_read, CTLFLAG_RW,
  91            &hammer2_iod_indr_read, 0, "");
  92 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_file_write, CTLFLAG_RW,
  93            &hammer2_iod_file_write, 0, "");
  94 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_meta_write, CTLFLAG_RW,
  95            &hammer2_iod_meta_write, 0, "");
  96 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_indr_write, CTLFLAG_RW,
  97            &hammer2_iod_indr_write, 0, "");
  98 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, iod_volu_write, CTLFLAG_RW,
  99            &hammer2_iod_volu_write, 0, "");
 100 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, ioa_file_read, CTLFLAG_RW,
 101            &hammer2_ioa_file_read, 0, "");
 102 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, ioa_meta_read, CTLFLAG_RW,
 103            &hammer2_ioa_meta_read, 0, "");
 104 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, ioa_indr_read, CTLFLAG_RW,
 105            &hammer2_ioa_indr_read, 0, "");
 106 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, ioa_file_write, CTLFLAG_RW,
 107            &hammer2_ioa_file_write, 0, "");
 108 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, ioa_meta_write, CTLFLAG_RW,
 109            &hammer2_ioa_meta_write, 0, "");
 110 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, ioa_indr_write, CTLFLAG_RW,
 111            &hammer2_ioa_indr_write, 0, "");
 112 SYSCTL_LONG(_vfs_hammer2, OID_AUTO, ioa_volu_write, CTLFLAG_RW,
 113            &hammer2_ioa_volu_write, 0, "");
 114
 115 static int hammer2_vfs_init(struct vfsconf *conf);
 116 static int hammer2_vfs_mount(struct mount *mp, char *path, caddr_t data,
 117                                 struct ucred *cred);
 118 static int hammer2_remount(struct mount *, char *, struct vnode *,
 119                                 struct ucred *);
 120 static int hammer2_vfs_unmount(struct mount *mp, int mntflags);
 121 static int hammer2_vfs_root(struct mount *mp, struct vnode **vpp);
 122 static int hammer2_vfs_statfs(struct mount *mp, struct statfs *sbp,
 123                                 struct ucred *cred);
 124 static int hammer2_vfs_statvfs(struct mount *mp, struct statvfs *sbp,
 125                                 struct ucred *cred);
 126 static int hammer2_vfs_sync(struct mount *mp, int waitfor);
 127 static int hammer2_vfs_vget(struct mount *mp, struct vnode *dvp,
 128                                 ino_t ino, struct vnode **vpp);
 129 static int hammer2_vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
 130                                 struct fid *fhp, struct vnode **vpp);
 131 static int hammer2_vfs_vptofh(struct vnode *vp, struct fid *fhp);
 132 static int hammer2_vfs_checkexp(struct mount *mp, struct sockaddr *nam,
 133                                 int *exflagsp, struct ucred **credanonp);
 134
 135 static int hammer2_install_volume_header(hammer2_mount_t *hmp);
 136 static int hammer2_sync_scan1(struct mount *mp, struct vnode *vp, void *data);
 137 static int hammer2_sync_scan2(struct mount *mp, struct vnode *vp, void *data);
 138
 139 static int hammer2_rcvdmsg(kdmsg_msg_t *msg);
 140 static void hammer2_autodmsg(kdmsg_msg_t *msg);
 141
 142 /*
 143  * HAMMER2 vfs operations.
 144  */
 145 static struct vfsops hammer2_vfsops = {
 146         .vfs_init       = hammer2_vfs_init,
 147         .vfs_sync       = hammer2_vfs_sync,
 148         .vfs_mount      = hammer2_vfs_mount,
 149         .vfs_unmount    = hammer2_vfs_unmount,
 150         .vfs_root       = hammer2_vfs_root,
 151         .vfs_statfs     = hammer2_vfs_statfs,
 152         .vfs_statvfs    = hammer2_vfs_statvfs,
 153         .vfs_vget       = hammer2_vfs_vget,
 154         .vfs_vptofh     = hammer2_vfs_vptofh,
 155         .vfs_fhtovp     = hammer2_vfs_fhtovp,
 156         .vfs_checkexp   = hammer2_vfs_checkexp
 157 };
 158
 159 MALLOC_DEFINE(M_HAMMER2, "HAMMER2-mount", "");
 160
 161 VFS_SET(hammer2_vfsops, hammer2, 0);
 162 MODULE_VERSION(hammer2, 1);
 163
 164 static
 165 int
 166 hammer2_vfs_init(struct vfsconf *conf)
 167 {
 168         int error;
 169
 170         error = 0;
 171
 172         if (HAMMER2_BLOCKREF_BYTES != sizeof(struct hammer2_blockref))
 173                 error = EINVAL;
 174         if (HAMMER2_INODE_BYTES != sizeof(struct hammer2_inode_data))
 175                 error = EINVAL;
 176         if (HAMMER2_ALLOCREF_BYTES != sizeof(struct hammer2_allocref))
 177                 error = EINVAL;
 178         if (HAMMER2_VOLUME_BYTES != sizeof(struct hammer2_volume_data))
 179                 error = EINVAL;
 180
 181         if (error)
 182                 kprintf("HAMMER2 structure size mismatch; cannot continue.\n");
 183
 184         lockinit(&hammer2_mntlk, "mntlk", 0, 0);
 185         TAILQ_INIT(&hammer2_mntlist);
 186
 187         return (error);
 188 }
 189
 190 /*
 191  * Mount or remount HAMMER2 fileystem from physical media
 192  *
 193  *      mountroot
 194  *              mp              mount point structure
 195  *              path            NULL
 196  *              data            <unused>
 197  *              cred            <unused>
 198  *
 199  *      mount
 200  *              mp              mount point structure
 201  *              path            path to mount point
 202  *              data            pointer to argument structure in user space
 203  *                      volume  volume path (device@LABEL form)
 204  *                      hflags  user mount flags
 205  *              cred            user credentials
 206  *
 207  * RETURNS:     0       Success
 208  *              !0      error number
 209  */
 210 static
 211 int
 212 hammer2_vfs_mount(struct mount *mp, char *path, caddr_t data,
 213                   struct ucred *cred)
 214 {
 215         struct hammer2_mount_info info;
 216         hammer2_pfsmount_t *pmp;
 217         hammer2_mount_t *hmp;
 218         hammer2_key_t lhc;
 219         struct vnode *devvp;
 220         struct nlookupdata nd;
 221         hammer2_chain_t *parent;
 222         hammer2_chain_t *schain;
 223         hammer2_chain_t *rchain;
 224         struct file *fp;
 225         char devstr[MNAMELEN];
 226         size_t size;
 227         size_t done;
 228         char *dev;
 229         char *label;
 230         int ronly = 1;
 231         int create_hmp;
 232         int error;
 233
 234         hmp = NULL;
 235         pmp = NULL;
 236         dev = NULL;
 237         label = NULL;
 238         devvp = NULL;
 239
 240         kprintf("hammer2_mount\n");
 241
 242         if (path == NULL) {
 243                 /*
 244                  * Root mount
 245                  */
 246                 bzero(&info, sizeof(info));
 247                 info.cluster_fd = -1;
 248                 return (EOPNOTSUPP);
 249         } else {
 250                 /*
 251                  * Non-root mount or updating a mount
 252                  */
 253                 error = copyin(data, &info, sizeof(info));
 254                 if (error)
 255                         return (error);
 256
 257                 error = copyinstr(info.volume, devstr, MNAMELEN - 1, &done);
 258                 if (error)
 259                         return (error);
 260
 261                 /* Extract device and label */
 262                 dev = devstr;
 263                 label = strchr(devstr, '@');
 264                 if (label == NULL ||
 265                     ((label + 1) - dev) > done) {
 266                         return (EINVAL);
 267                 }
 268                 *label = '\0';
 269                 label++;
 270                 if (*label == '\0')
 271                         return (EINVAL);
 272
 273                 if (mp->mnt_flag & MNT_UPDATE) {
 274                         /* Update mount */
 275                         /* HAMMER2 implements NFS export via mountctl */
 276                         hmp = MPTOHMP(mp);
 277                         devvp = hmp->devvp;
 278                         error = hammer2_remount(mp, path, devvp, cred);
 279                         return error;
 280                 }
 281         }
 282
 283         /*
 284          * PFS mount
 285          *
 286          * Lookup name and verify it refers to a block device.
 287          */
 288         error = nlookup_init(&nd, dev, UIO_SYSSPACE, NLC_FOLLOW);
 289         if (error == 0)
 290                 error = nlookup(&nd);
 291         if (error == 0)
 292                 error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp);
 293         nlookup_done(&nd);
 294
 295         if (error == 0) {
 296                 if (vn_isdisk(devvp, &error))
 297                         error = vfs_mountedon(devvp);
 298         }
 299
 300         /*
 301          * Determine if the device has already been mounted.  After this
 302          * check hmp will be non-NULL if we are doing the second or more
 303          * hammer2 mounts from the same device.
 304          */
 305         lockmgr(&hammer2_mntlk, LK_EXCLUSIVE);
 306         TAILQ_FOREACH(hmp, &hammer2_mntlist, mntentry) {
 307                 if (hmp->devvp == devvp)
 308                         break;
 309         }
 310
 311         /*
 312          * Open the device if this isn't a secondary mount
 313          */
 314         if (hmp) {
 315                 create_hmp = 0;
 316         } else {
 317                 create_hmp = 1;
 318                 if (error == 0 && vcount(devvp) > 0)
 319                         error = EBUSY;
 320
 321                 /*
 322                  * Now open the device
 323                  */
 324                 if (error == 0) {
 325                         ronly = ((mp->mnt_flag & MNT_RDONLY) != 0);
 326                         vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
 327                         error = vinvalbuf(devvp, V_SAVE, 0, 0);
 328                         if (error == 0) {
 329                                 error = VOP_OPEN(devvp,
 330                                                  ronly ? FREAD : FREAD | FWRITE,
 331                                                  FSCRED, NULL);
 332                         }
 333                         vn_unlock(devvp);
 334                 }
 335                 if (error && devvp) {
 336                         vrele(devvp);
 337                         devvp = NULL;
 338                 }
 339                 if (error) {
 340                         lockmgr(&hammer2_mntlk, LK_RELEASE);
 341                         return error;
 342                 }
 343         }
 344
 345         /*
 346          * Block device opened successfully, finish initializing the
 347          * mount structure.
 348          *
 349          * From this point on we have to call hammer2_unmount() on failure.
 350          */
 351         pmp = kmalloc(sizeof(*pmp), M_HAMMER2, M_WAITOK | M_ZERO);
 352         mp->mnt_data = (qaddr_t)pmp;
 353         pmp->mp = mp;
 354
 355         kmalloc_create(&pmp->mmsg, "HAMMER2-pfsmsg");
 356         kdmsg_iocom_init(&pmp->iocom, pmp,
 357                          KDMSG_IOCOMF_AUTOCONN |
 358                          KDMSG_IOCOMF_AUTOSPAN |
 359                          KDMSG_IOCOMF_AUTOCIRC,
 360                          pmp->mmsg, hammer2_rcvdmsg);
 361
 362         if (create_hmp) {
 363                 hmp = kmalloc(sizeof(*hmp), M_HAMMER2, M_WAITOK | M_ZERO);
 364                 hmp->ronly = ronly;
 365                 hmp->devvp = devvp;
 366                 kmalloc_create(&hmp->minode, "HAMMER2-inodes");
 367                 kmalloc_create(&hmp->mchain, "HAMMER2-chains");
 368                 TAILQ_INSERT_TAIL(&hammer2_mntlist, hmp, mntentry);
 369         }
 370         ccms_domain_init(&pmp->ccms_dom);
 371         pmp->hmp = hmp;
 372         ++hmp->pmp_count;
 373         lockmgr(&hammer2_mntlk, LK_RELEASE);
 374         kprintf("hammer2_mount hmp=%p pmpcnt=%d\n", hmp, hmp->pmp_count);
 375
 376         mp->mnt_flag = MNT_LOCAL;
 377         mp->mnt_kern_flag |= MNTK_ALL_MPSAFE;   /* all entry pts are SMP */
 378
 379         if (create_hmp) {
 380                 /*
 381                  * vchain setup. vchain.data is special cased to NULL.
 382                  * vchain.refs is initialized and will never drop to 0.
 383                  */
 384                 hmp->vchain.refs = 1;
 385                 hmp->vchain.data = (void *)&hmp->voldata;
 386                 hmp->vchain.bref.type = HAMMER2_BREF_TYPE_VOLUME;
 387                 hmp->vchain.bref.data_off = 0 | HAMMER2_PBUFRADIX;
 388                 hmp->vchain.bref_flush = hmp->vchain.bref;
 389                 ccms_cst_init(&hmp->vchain.cst, NULL);
 390                 /* hmp->vchain.u.xxx is left NULL */
 391                 lockinit(&hmp->alloclk, "h2alloc", 0, 0);
 392                 lockinit(&hmp->voldatalk, "voldata", 0, LK_CANRECURSE);
 393
 394                 /*
 395                  * Install the volume header
 396                  */
 397                 error = hammer2_install_volume_header(hmp);
 398                 if (error) {
 399                         hammer2_vfs_unmount(mp, MNT_FORCE);
 400                         return error;
 401                 }
 402         }
 403
 404         /*
 405          * required mount structure initializations
 406          */
 407         mp->mnt_stat.f_iosize = HAMMER2_PBUFSIZE;
 408         mp->mnt_stat.f_bsize = HAMMER2_PBUFSIZE;
 409
 410         mp->mnt_vstat.f_frsize = HAMMER2_PBUFSIZE;
 411         mp->mnt_vstat.f_bsize = HAMMER2_PBUFSIZE;
 412
 413         /*
 414          * Optional fields
 415          */
 416         mp->mnt_iosize_max = MAXPHYS;
 417
 418         /*
 419          * First locate the super-root inode, which is key 0 relative to the
 420          * volume header's blockset.
 421          *
 422          * Then locate the root inode by scanning the directory keyspace
 423          * represented by the label.
 424          */
 425         if (create_hmp) {
 426                 parent = &hmp->vchain;
 427                 hammer2_chain_lock(hmp, parent, HAMMER2_RESOLVE_ALWAYS);
 428                 schain = hammer2_chain_lookup(hmp, &parent,
 429                                       HAMMER2_SROOT_KEY, HAMMER2_SROOT_KEY, 0);
 430                 hammer2_chain_unlock(hmp, parent);
 431                 if (schain == NULL) {
 432                         kprintf("hammer2_mount: invalid super-root\n");
 433                         hammer2_vfs_unmount(mp, MNT_FORCE);
 434                         return EINVAL;
 435                 }
 436                 hammer2_chain_ref(hmp, schain); /* for hmp->schain */
 437                 hmp->schain = schain;           /* left locked */
 438         } else {
 439                 schain = hmp->schain;
 440                 hammer2_chain_lock(hmp, schain, HAMMER2_RESOLVE_ALWAYS);
 441         }
 442
 443         parent = schain;
 444         lhc = hammer2_dirhash(label, strlen(label));
 445         rchain = hammer2_chain_lookup(hmp, &parent,
 446                                       lhc, lhc + HAMMER2_DIRHASH_LOMASK,
 447                                       0);
 448         while (rchain) {
 449                 if (rchain->bref.type == HAMMER2_BREF_TYPE_INODE &&
 450                     rchain->u.ip &&
 451                     strcmp(label, rchain->data->ipdata.filename) == 0) {
 452                         break;
 453                 }
 454                 rchain = hammer2_chain_next(hmp, &parent, rchain,
 455                                             lhc, lhc + HAMMER2_DIRHASH_LOMASK,
 456                                             0);
 457         }
 458         hammer2_chain_unlock(hmp, parent);
 459         if (rchain == NULL) {
 460                 kprintf("hammer2_mount: PFS label not found\n");
 461                 hammer2_vfs_unmount(mp, MNT_FORCE);
 462                 return EINVAL;
 463         }
 464         if (rchain->flags & HAMMER2_CHAIN_MOUNTED) {
 465                 hammer2_chain_unlock(hmp, rchain);
 466                 kprintf("hammer2_mount: PFS label already mounted!\n");
 467                 hammer2_vfs_unmount(mp, MNT_FORCE);
 468                 return EBUSY;
 469         }
 470         atomic_set_int(&rchain->flags, HAMMER2_CHAIN_MOUNTED);
 471
 472         hammer2_chain_ref(hmp, rchain); /* for pmp->rchain */
 473         hammer2_chain_unlock(hmp, rchain);
 474         pmp->rchain = rchain;           /* left held & unlocked */
 475         pmp->iroot = rchain->u.ip;      /* implied hold from rchain */
 476         pmp->iroot->pmp = pmp;
 477
 478         kprintf("iroot %p\n", pmp->iroot);
 479
 480         /*
 481          * Ref the cluster management messaging descriptor.  The mount
 482          * program deals with the other end of the communications pipe.
 483          */
 484         fp = holdfp(curproc->p_fd, info.cluster_fd, -1);
 485         if (fp == NULL) {
 486                 kprintf("hammer2_mount: bad cluster_fd!\n");
 487                 hammer2_vfs_unmount(mp, MNT_FORCE);
 488                 return EBADF;
 489         }
 490         hammer2_cluster_reconnect(pmp, fp);
 491
 492         /*
 493          * Finish setup
 494          */
 495         vfs_getnewfsid(mp);
 496         vfs_add_vnodeops(mp, &hammer2_vnode_vops, &mp->mnt_vn_norm_ops);
 497         vfs_add_vnodeops(mp, &hammer2_spec_vops, &mp->mnt_vn_spec_ops);
 498         vfs_add_vnodeops(mp, &hammer2_fifo_vops, &mp->mnt_vn_fifo_ops);
 499
 500         copyinstr(info.volume, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
 501         bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
 502         bzero(mp->mnt_stat.f_mntonname, sizeof(mp->mnt_stat.f_mntonname));
 503         copyinstr(path, mp->mnt_stat.f_mntonname,
 504                   sizeof(mp->mnt_stat.f_mntonname) - 1,
 505                   &size);
 506
 507         /*
 508          * Initial statfs to prime mnt_stat.
 509          */
 510         hammer2_vfs_statfs(mp, &mp->mnt_stat, cred);
 511
 512         return 0;
 513 }
 514
 515 static
 516 int
 517 hammer2_remount(struct mount *mp, char *path, struct vnode *devvp,
 518                 struct ucred *cred)
 519 {
 520         return (0);
 521 }
 522
 523 static
 524 int
 525 hammer2_vfs_unmount(struct mount *mp, int mntflags)
 526 {
 527         hammer2_pfsmount_t *pmp;
 528         hammer2_mount_t *hmp;
 529         int flags;
 530         int error = 0;
 531         int ronly = ((mp->mnt_flag & MNT_RDONLY) != 0);
 532         struct vnode *devvp;
 533
 534         pmp = MPTOPMP(mp);
 535         hmp = pmp->hmp;
 536         flags = 0;
 537
 538         if (mntflags & MNT_FORCE)
 539                 flags |= FORCECLOSE;
 540
 541         hammer2_mount_exlock(hmp);
 542
 543         /*
 544          * If mount initialization proceeded far enough we must flush
 545          * its vnodes.
 546          */
 547         if (pmp->iroot)
 548                 error = vflush(mp, 0, flags);
 549
 550         if (error)
 551                 return error;
 552
 553         lockmgr(&hammer2_mntlk, LK_EXCLUSIVE);
 554         --hmp->pmp_count;
 555         kprintf("hammer2_unmount hmp=%p pmpcnt=%d\n", hmp, hmp->pmp_count);
 556
 557         /*
 558          * Flush any left over chains.  The voldata lock is only used
 559          * to synchronize against HAMMER2_CHAIN_MODIFIED_AUX.
 560          */
 561         hammer2_voldata_lock(hmp);
 562         if (hmp->vchain.flags & (HAMMER2_CHAIN_MODIFIED |
 563                                  HAMMER2_CHAIN_MODIFIED_AUX |
 564                                  HAMMER2_CHAIN_SUBMODIFIED)) {
 565                 hammer2_voldata_unlock(hmp);
 566                 hammer2_vfs_sync(mp, MNT_WAIT);
 567         } else {
 568                 hammer2_voldata_unlock(hmp);
 569         }
 570         if (hmp->pmp_count == 0) {
 571                 if (hmp->vchain.flags & (HAMMER2_CHAIN_MODIFIED |
 572                                          HAMMER2_CHAIN_MODIFIED_AUX |
 573                                          HAMMER2_CHAIN_SUBMODIFIED)) {
 574                         kprintf("hammer2_unmount: chains left over after "
 575                                 "final sync\n");
 576                         if (hammer2_debug & 0x0010)
 577                                 Debugger("entered debugger");
 578                 }
 579         }
 580
 581         /*
 582          * Cleanup the root and super-root chain elements (which should be
 583          * clean).
 584          */
 585         pmp->iroot = NULL;
 586         if (pmp->rchain) {
 587                 atomic_clear_int(&pmp->rchain->flags, HAMMER2_CHAIN_MOUNTED);
 588                 KKASSERT(pmp->rchain->refs == 1);
 589                 hammer2_chain_drop(hmp, pmp->rchain);
 590                 pmp->rchain = NULL;
 591         }
 592         ccms_domain_uninit(&pmp->ccms_dom);
 593
 594         /*
 595          * Kill cluster controller
 596          */
 597         kdmsg_iocom_uninit(&pmp->iocom);
 598
 599         /*
 600          * If no PFS's left drop the master hammer2_mount for the device.
 601          */
 602         if (hmp->pmp_count == 0) {
 603                 if (hmp->schain) {
 604                         KKASSERT(hmp->schain->refs == 1);
 605                         hammer2_chain_drop(hmp, hmp->schain);
 606                         hmp->schain = NULL;
 607                 }
 608
 609                 /*
 610                  * Finish up with the device vnode
 611                  */
 612                 if ((devvp = hmp->devvp) != NULL) {
 613                         vinvalbuf(devvp, (ronly ? 0 : V_SAVE), 0, 0);
 614                         hmp->devvp = NULL;
 615                         VOP_CLOSE(devvp, (ronly ? FREAD : FREAD|FWRITE));
 616                         vrele(devvp);
 617                         devvp = NULL;
 618                 }
 619         }
 620         hammer2_mount_unlock(hmp);
 621
 622         pmp->mp = NULL;
 623         pmp->hmp = NULL;
 624         mp->mnt_data = NULL;
 625
 626         kmalloc_destroy(&pmp->mmsg);
 627
 628         kfree(pmp, M_HAMMER2);
 629         if (hmp->pmp_count == 0) {
 630                 TAILQ_REMOVE(&hammer2_mntlist, hmp, mntentry);
 631                 kmalloc_destroy(&hmp->minode);
 632                 kmalloc_destroy(&hmp->mchain);
 633                 kfree(hmp, M_HAMMER2);
 634         }
 635         lockmgr(&hammer2_mntlk, LK_RELEASE);
 636         return (error);
 637 }
 638
 639 static
 640 int
 641 hammer2_vfs_vget(struct mount *mp, struct vnode *dvp,
 642              ino_t ino, struct vnode **vpp)
 643 {
 644         kprintf("hammer2_vget\n");
 645         return (EOPNOTSUPP);
 646 }
 647
 648 static
 649 int
 650 hammer2_vfs_root(struct mount *mp, struct vnode **vpp)
 651 {
 652         hammer2_pfsmount_t *pmp;
 653         hammer2_mount_t *hmp;
 654         int error;
 655         struct vnode *vp;
 656
 657         pmp = MPTOPMP(mp);
 658         hmp = pmp->hmp;
 659         hammer2_mount_exlock(hmp);
 660         if (pmp->iroot == NULL) {
 661                 *vpp = NULL;
 662                 error = EINVAL;
 663         } else {
 664                 hammer2_chain_lock(hmp, &pmp->iroot->chain,
 665                                    HAMMER2_RESOLVE_ALWAYS |
 666                                    HAMMER2_RESOLVE_SHARED);
 667                 vp = hammer2_igetv(pmp->iroot, &error);
 668                 hammer2_chain_unlock(hmp, &pmp->iroot->chain);
 669                 *vpp = vp;
 670                 if (vp == NULL)
 671                         kprintf("vnodefail\n");
 672         }
 673         hammer2_mount_unlock(hmp);
 674
 675         return (error);
 676 }
 677
 678 /*
 679  * Filesystem status
 680  *
 681  * XXX incorporate pmp->iroot->ip_data.inode_quota and data_quota
 682  */
 683 static
 684 int
 685 hammer2_vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
 686 {
 687         hammer2_pfsmount_t *pmp;
 688         hammer2_mount_t *hmp;
 689
 690         pmp = MPTOPMP(mp);
 691         hmp = MPTOHMP(mp);
 692
 693         mp->mnt_stat.f_files = pmp->iroot->ip_data.inode_count +
 694                                pmp->iroot->delta_icount;
 695         mp->mnt_stat.f_ffree = 0;
 696         mp->mnt_stat.f_blocks = hmp->voldata.allocator_size / HAMMER2_PBUFSIZE;
 697         mp->mnt_stat.f_bfree = (hmp->voldata.allocator_size -
 698                                 hmp->voldata.allocator_beg) / HAMMER2_PBUFSIZE;
 699         mp->mnt_stat.f_bavail = mp->mnt_stat.f_bfree;
 700
 701         *sbp = mp->mnt_stat;
 702         return (0);
 703 }
 704
 705 static
 706 int
 707 hammer2_vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred)
 708 {
 709         hammer2_pfsmount_t *pmp;
 710         hammer2_mount_t *hmp;
 711
 712         pmp = MPTOPMP(mp);
 713         hmp = MPTOHMP(mp);
 714
 715         mp->mnt_vstat.f_bsize = HAMMER2_PBUFSIZE;
 716         mp->mnt_vstat.f_files = pmp->iroot->ip_data.inode_count +
 717                                 pmp->iroot->delta_icount;
 718         mp->mnt_vstat.f_ffree = 0;
 719         mp->mnt_vstat.f_blocks = hmp->voldata.allocator_size / HAMMER2_PBUFSIZE;
 720         mp->mnt_vstat.f_bfree = (hmp->voldata.allocator_size -
 721                                  hmp->voldata.allocator_beg) / HAMMER2_PBUFSIZE;
 722         mp->mnt_vstat.f_bavail = mp->mnt_vstat.f_bfree;
 723
 724         *sbp = mp->mnt_vstat;
 725         return (0);
 726 }
 727
 728 /*
 729  * Sync the entire filesystem; this is called from the filesystem syncer
 730  * process periodically and whenever a user calls sync(1) on the hammer
 731  * mountpoint.
 732  *
 733  * Currently is actually called from the syncer! \o/
 734  *
 735  * This task will have to snapshot the state of the dirty inode chain.
 736  * From that, it will have to make sure all of the inodes on the dirty
 737  * chain have IO initiated. We make sure that io is initiated for the root
 738  * block.
 739  *
 740  * If waitfor is set, we wait for media to acknowledge the new rootblock.
 741  *
 742  * THINKS: side A vs side B, to have sync not stall all I/O?
 743  */
 744 static
 745 int
 746 hammer2_vfs_sync(struct mount *mp, int waitfor)
 747 {
 748         struct hammer2_sync_info info;
 749         hammer2_mount_t *hmp;
 750         int flags;
 751         int error;
 752         int haswork;
 753         int i;
 754
 755         hmp = MPTOHMP(mp);
 756
 757         flags = VMSC_GETVP;
 758         if (waitfor & MNT_LAZY)
 759                 flags |= VMSC_ONEPASS;
 760
 761         info.error = 0;
 762         info.waitfor = MNT_NOWAIT;
 763         vmntvnodescan(mp, flags | VMSC_NOWAIT,
 764                       hammer2_sync_scan1,
 765                       hammer2_sync_scan2, &info);
 766         if (info.error == 0 && (waitfor & MNT_WAIT)) {
 767                 info.waitfor = waitfor;
 768                     vmntvnodescan(mp, flags,
 769                                   hammer2_sync_scan1,
 770                                   hammer2_sync_scan2, &info);
 771
 772         }
 773 #if 0
 774         if (waitfor == MNT_WAIT) {
 775                 /* XXX */
 776         } else {
 777                 /* XXX */
 778         }
 779 #endif
 780         hammer2_chain_lock(hmp, &hmp->vchain, HAMMER2_RESOLVE_ALWAYS);
 781         if (hmp->vchain.flags & (HAMMER2_CHAIN_MODIFIED |
 782                                  HAMMER2_CHAIN_MODIFIED_AUX |
 783                                  HAMMER2_CHAIN_SUBMODIFIED)) {
 784                 hammer2_chain_flush(hmp, &hmp->vchain, 0);
 785                 haswork = 1;
 786         } else {
 787                 haswork = 0;
 788         }
 789         hammer2_chain_unlock(hmp, &hmp->vchain);
 790
 791         error = 0;
 792
 793         /*
 794          * We can't safely flush the volume header until we have
 795          * flushed any device buffers which have built up.
 796          */
 797 #if 0
 798         if ((waitfor & MNT_LAZY) == 0) {
 799                 waitfor = MNT_NOWAIT;
 800                 vn_lock(hmp->devvp, LK_EXCLUSIVE | LK_RETRY);
 801                 error = VOP_FSYNC(hmp->devvp, waitfor, 0);
 802                 vn_unlock(hmp->devvp);
 803         }
 804 #endif
 805         vn_lock(hmp->devvp, LK_EXCLUSIVE | LK_RETRY);
 806         error = VOP_FSYNC(hmp->devvp, MNT_WAIT, 0);
 807         vn_unlock(hmp->devvp);
 808
 809         if (error == 0 && haswork) {
 810                 struct buf *bp;
 811
 812                 /*
 813                  * Synchronize the disk before flushing the volume
 814                  * header.
 815                  */
 816                 bp = getpbuf(NULL);
 817                 bp->b_bio1.bio_offset = 0;
 818                 bp->b_bufsize = 0;
 819                 bp->b_bcount = 0;
 820                 bp->b_cmd = BUF_CMD_FLUSH;
 821                 bp->b_bio1.bio_done = biodone_sync;
 822                 bp->b_bio1.bio_flags |= BIO_SYNC;
 823                 vn_strategy(hmp->devvp, &bp->b_bio1);
 824                 biowait(&bp->b_bio1, "h2vol");
 825                 relpbuf(bp, NULL);
 826
 827                 /*
 828                  * Then we can safely flush the version of the volume header
 829                  * synchronized by the flush code.
 830                  */
 831                 i = hmp->volhdrno + 1;
 832                 if (i >= HAMMER2_NUM_VOLHDRS)
 833                         i = 0;
 834                 if (i * HAMMER2_ZONE_BYTES64 + HAMMER2_SEGSIZE >
 835                     hmp->volsync.volu_size) {
 836                         i = 0;
 837                 }
 838                 kprintf("sync volhdr %d %jd\n",
 839                         i, (intmax_t)hmp->volsync.volu_size);
 840                 bp = getblk(hmp->devvp, i * HAMMER2_ZONE_BYTES64,
 841                             HAMMER2_PBUFSIZE, 0, 0);
 842                 bcopy(&hmp->volsync, bp->b_data, HAMMER2_PBUFSIZE);
 843                 bawrite(bp);
 844                 hmp->volhdrno = i;
 845         }
 846         return (error);
 847 }
 848
 849 /*
 850  * Sync passes.
 851  *
 852  * NOTE: We don't test SUBMODIFIED or MOVED here because the fsync code
 853  *       won't flush on those flags.  The syncer code above will do a
 854  *       general meta-data flush globally that will catch these flags.
 855  */
 856 static int
 857 hammer2_sync_scan1(struct mount *mp, struct vnode *vp, void *data)
 858 {
 859         hammer2_inode_t *ip;
 860
 861         ip = VTOI(vp);
 862         if (vp->v_type == VNON || ip == NULL ||
 863             ((ip->chain.flags & (HAMMER2_CHAIN_MODIFIED |
 864                                  HAMMER2_CHAIN_DIRTYEMBED)) == 0 &&
 865              RB_EMPTY(&vp->v_rbdirty_tree))) {
 866                 return(-1);
 867         }
 868         return(0);
 869 }
 870
 871 static int
 872 hammer2_sync_scan2(struct mount *mp, struct vnode *vp, void *data)
 873 {
 874         struct hammer2_sync_info *info = data;
 875         hammer2_inode_t *ip;
 876         int error;
 877
 878         ip = VTOI(vp);
 879         if (vp->v_type == VNON || vp->v_type == VBAD ||
 880             ((ip->chain.flags & (HAMMER2_CHAIN_MODIFIED |
 881                                  HAMMER2_CHAIN_DIRTYEMBED)) == 0 &&
 882             RB_EMPTY(&vp->v_rbdirty_tree))) {
 883                 return(0);
 884         }
 885         error = VOP_FSYNC(vp, MNT_NOWAIT, 0);
 886         if (error)
 887                 info->error = error;
 888         return(0);
 889 }
 890
 891 static
 892 int
 893 hammer2_vfs_vptofh(struct vnode *vp, struct fid *fhp)
 894 {
 895         return (0);
 896 }
 897
 898 static
 899 int
 900 hammer2_vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
 901                struct fid *fhp, struct vnode **vpp)
 902 {
 903         return (0);
 904 }
 905
 906 static
 907 int
 908 hammer2_vfs_checkexp(struct mount *mp, struct sockaddr *nam,
 909                  int *exflagsp, struct ucred **credanonp)
 910 {
 911         return (0);
 912 }
 913
 914 /*
 915  * Support code for hammer2_mount().  Read, verify, and install the volume
 916  * header into the HMP
 917  *
 918  * XXX read four volhdrs and use the one with the highest TID whos CRC
 919  *     matches.
 920  *
 921  * XXX check iCRCs.
 922  *
 923  * XXX For filesystems w/ less than 4 volhdrs, make sure to not write to
 924  *     nonexistant locations.
 925  *
 926  * XXX Record selected volhdr and ring updates to each of 4 volhdrs
 927  */
 928 static
 929 int
 930 hammer2_install_volume_header(hammer2_mount_t *hmp)
 931 {
 932         hammer2_volume_data_t *vd;
 933         struct buf *bp;
 934         hammer2_crc32_t crc0, crc, bcrc0, bcrc;
 935         int error_reported;
 936         int error;
 937         int valid;
 938         int i;
 939
 940         error_reported = 0;
 941         error = 0;
 942         valid = 0;
 943         bp = NULL;
 944
 945         /*
 946          * There are up to 4 copies of the volume header (syncs iterate
 947          * between them so there is no single master).  We don't trust the
 948          * volu_size field so we don't know precisely how large the filesystem
 949          * is, so depend on the OS to return an error if we go beyond the
 950          * block device's EOF.
 951          */
 952         for (i = 0; i < HAMMER2_NUM_VOLHDRS; i++) {
 953                 error = bread(hmp->devvp, i * HAMMER2_ZONE_BYTES64,
 954                               HAMMER2_VOLUME_BYTES, &bp);
 955                 if (error) {
 956                         brelse(bp);
 957                         bp = NULL;
 958                         continue;
 959                 }
 960
 961                 vd = (struct hammer2_volume_data *) bp->b_data;
 962                 if ((vd->magic != HAMMER2_VOLUME_ID_HBO) &&
 963                     (vd->magic != HAMMER2_VOLUME_ID_ABO)) {
 964                         brelse(bp);
 965                         bp = NULL;
 966                         continue;
 967                 }
 968
 969                 if (vd->magic == HAMMER2_VOLUME_ID_ABO) {
 970                         /* XXX: Reversed-endianness filesystem */
 971                         kprintf("hammer2: reverse-endian filesystem detected");
 972                         brelse(bp);
 973                         bp = NULL;
 974                         continue;
 975                 }
 976
 977                 crc = vd->icrc_sects[HAMMER2_VOL_ICRC_SECT0];
 978                 crc0 = hammer2_icrc32(bp->b_data + HAMMER2_VOLUME_ICRC0_OFF,
 979                                       HAMMER2_VOLUME_ICRC0_SIZE);
 980                 bcrc = vd->icrc_sects[HAMMER2_VOL_ICRC_SECT1];
 981                 bcrc0 = hammer2_icrc32(bp->b_data + HAMMER2_VOLUME_ICRC1_OFF,
 982                                        HAMMER2_VOLUME_ICRC1_SIZE);
 983                 if ((crc0 != crc) || (bcrc0 != bcrc)) {
 984                         kprintf("hammer2 volume header crc "
 985                                 "mismatch copy #%d %08x/%08x\n",
 986                                 i, crc0, crc);
 987                         error_reported = 1;
 988                         brelse(bp);
 989                         bp = NULL;
 990                         continue;
 991                 }
 992                 if (valid == 0 || hmp->voldata.mirror_tid < vd->mirror_tid) {
 993                         valid = 1;
 994                         hmp->voldata = *vd;
 995                         hmp->volhdrno = i;
 996                 }
 997                 brelse(bp);
 998                 bp = NULL;
 999         }
1000         if (valid) {
1001                 hmp->volsync = hmp->voldata;
1002                 error = 0;
1003                 if (error_reported || bootverbose || 1) { /* 1/DEBUG */
1004                         kprintf("hammer2: using volume header #%d\n",
1005                                 hmp->volhdrno);
1006                 }
1007         } else {
1008                 error = EINVAL;
1009                 kprintf("hammer2: no valid volume headers found!\n");
1010         }
1011         return (error);
1012 }
1013
1014 /*
1015  * Reconnect using the passed file pointer.  The caller must ref the
1016  * fp for us.
1017  */
1018 void
1019 hammer2_cluster_reconnect(hammer2_pfsmount_t *pmp, struct file *fp)
1020 {
1021         size_t name_len;
1022
1023         /*
1024          * Closes old comm descriptor, kills threads, cleans up
1025          * states, then installs the new descriptor and creates
1026          * new threads.
1027          */
1028         kdmsg_iocom_reconnect(&pmp->iocom, fp, "hammer2");
1029
1030         /*
1031          * Setup LNK_CONN fields for autoinitiated state machine
1032          */
1033         pmp->iocom.auto_lnk_conn.pfs_clid = pmp->iroot->ip_data.pfs_clid;
1034         pmp->iocom.auto_lnk_conn.pfs_fsid = pmp->iroot->ip_data.pfs_fsid;
1035         pmp->iocom.auto_lnk_conn.pfs_type = pmp->iroot->ip_data.pfs_type;
1036         pmp->iocom.auto_lnk_conn.proto_version = DMSG_SPAN_PROTO_1;
1037         pmp->iocom.auto_lnk_conn.peer_type = pmp->hmp->voldata.peer_type;
1038
1039         /*
1040          * Filter adjustment.  Clients do not need visibility into other
1041          * clients (otherwise millions of clients would present a serious
1042          * problem).  The fs_label also serves to restrict the namespace.
1043          */
1044         pmp->iocom.auto_lnk_conn.peer_mask = 1LLU << HAMMER2_PEER_HAMMER2;
1045         pmp->iocom.auto_lnk_conn.pfs_mask = (uint64_t)-1;
1046         switch (pmp->iroot->ip_data.pfs_type) {
1047         case DMSG_PFSTYPE_CLIENT:
1048                 pmp->iocom.auto_lnk_conn.peer_mask &=
1049                                 ~(1LLU << DMSG_PFSTYPE_CLIENT);
1050                 break;
1051         default:
1052                 break;
1053         }
1054
1055         name_len = pmp->iroot->ip_data.name_len;
1056         if (name_len >= sizeof(pmp->iocom.auto_lnk_conn.fs_label))
1057                 name_len = sizeof(pmp->iocom.auto_lnk_conn.fs_label) - 1;
1058         bcopy(pmp->iroot->ip_data.filename,
1059               pmp->iocom.auto_lnk_conn.fs_label,
1060               name_len);
1061         pmp->iocom.auto_lnk_conn.fs_label[name_len] = 0;
1062
1063         /*
1064          * Setup LNK_SPAN fields for autoinitiated state machine
1065          */
1066         pmp->iocom.auto_lnk_span.pfs_clid = pmp->iroot->ip_data.pfs_clid;
1067         pmp->iocom.auto_lnk_span.pfs_fsid = pmp->iroot->ip_data.pfs_fsid;
1068         pmp->iocom.auto_lnk_span.pfs_type = pmp->iroot->ip_data.pfs_type;
1069         pmp->iocom.auto_lnk_span.peer_type = pmp->hmp->voldata.peer_type;
1070         pmp->iocom.auto_lnk_span.proto_version = DMSG_SPAN_PROTO_1;
1071         name_len = pmp->iroot->ip_data.name_len;
1072         if (name_len >= sizeof(pmp->iocom.auto_lnk_span.fs_label))
1073                 name_len = sizeof(pmp->iocom.auto_lnk_span.fs_label) - 1;
1074         bcopy(pmp->iroot->ip_data.filename,
1075               pmp->iocom.auto_lnk_span.fs_label,
1076               name_len);
1077         pmp->iocom.auto_lnk_span.fs_label[name_len] = 0;
1078
1079         kdmsg_iocom_autoinitiate(&pmp->iocom, hammer2_autodmsg);
1080 }
1081
1082 static int
1083 hammer2_rcvdmsg(kdmsg_msg_t *msg)
1084 {
1085         switch(msg->any.head.cmd & DMSGF_TRANSMASK) {
1086         case DMSG_DBG_SHELL:
1087                 /*
1088                  * (non-transaction)
1089                  * Execute shell command (not supported atm)
1090                  */
1091                 kdmsg_msg_reply(msg, DMSG_ERR_NOSUPP);
1092                 break;
1093         case DMSG_DBG_SHELL | DMSGF_REPLY:
1094                 /*
1095                  * (non-transaction)
1096                  */
1097                 if (msg->aux_data) {
1098                         msg->aux_data[msg->aux_size - 1] = 0;
1099                         kprintf("HAMMER2 DBG: %s\n", msg->aux_data);
1100                 }
1101                 break;
1102         default:
1103                 /*
1104                  * Unsupported message received.  We only need to
1105                  * reply if it's a transaction in order to close our end.
1106                  * Ignore any one-way messages are any further messages
1107                  * associated with the transaction.
1108                  *
1109                  * NOTE: This case also includes DMSG_LNK_ERROR messages
1110                  *       which might be one-way, replying to those would
1111                  *       cause an infinite ping-pong.
1112                  */
1113                 if (msg->any.head.cmd & DMSGF_CREATE)
1114                         kdmsg_msg_reply(msg, DMSG_ERR_NOSUPP);
1115                 break;
1116         }
1117         return(0);
1118 }
1119
1120 /*
1121  * This function is called after KDMSG has automatically handled processing
1122  * of a LNK layer message (typically CONN, SPAN, or CIRC).
1123  *
1124  * We tag off the LNK_CONN to trigger our LNK_VOLCONF messages which
1125  * advertises all available hammer2 super-root volumes.
1126  */
1127 static void
1128 hammer2_autodmsg(kdmsg_msg_t *msg)
1129 {
1130         hammer2_pfsmount_t *pmp = msg->iocom->handle;
1131         hammer2_mount_t *hmp = pmp->hmp;
1132         int copyid;
1133
1134         /*
1135          * We only care about replies to our LNK_CONN auto-request.  kdmsg
1136          * has already processed the reply, we use this calback as a shim
1137          * to know when we can advertise available super-root volumes.
1138          */
1139         if ((msg->any.head.cmd & DMSGF_TRANSMASK) !=
1140             (DMSG_LNK_CONN | DMSGF_CREATE | DMSGF_REPLY) ||
1141             msg->state == NULL) {
1142                 return;
1143         }
1144
1145         kprintf("LNK_CONN REPLY RECEIVED CMD %08x\n", msg->any.head.cmd);
1146
1147         if (msg->any.head.cmd & DMSGF_CREATE) {
1148                 kprintf("HAMMER2: VOLDATA DUMP\n");
1149
1150                 /*
1151                  * Dump the configuration stored in the volume header
1152                  */
1153                 hammer2_voldata_lock(hmp);
1154                 for (copyid = 0; copyid < HAMMER2_COPYID_COUNT; ++copyid) {
1155                         if (hmp->voldata.copyinfo[copyid].copyid == 0)
1156                                 continue;
1157                         hammer2_volconf_update(pmp, copyid);
1158                 }
1159                 hammer2_voldata_unlock(hmp);
1160         }
1161         if ((msg->any.head.cmd & DMSGF_DELETE) &&
1162             msg->state && (msg->state->txcmd & DMSGF_DELETE) == 0) {
1163                 kprintf("HAMMER2: CONN WAS TERMINATED\n");
1164         }
1165 }
1166
1167 /*
1168  * Volume configuration updates are passed onto the userland service
1169  * daemon via the open LNK_CONN transaction.
1170  */
1171 void
1172 hammer2_volconf_update(hammer2_pfsmount_t *pmp, int index)
1173 {
1174         hammer2_mount_t *hmp = pmp->hmp;
1175         kdmsg_msg_t *msg;
1176
1177         /* XXX interlock against connection state termination */
1178         kprintf("volconf update %p\n", pmp->iocom.conn_state);
1179         if (pmp->iocom.conn_state) {
1180                 kprintf("TRANSMIT VOLCONF VIA OPEN CONN TRANSACTION\n");
1181                 msg = kdmsg_msg_alloc_state(pmp->iocom.conn_state,
1182                                             DMSG_LNK_VOLCONF, NULL, NULL);
1183                 msg->any.lnk_volconf.copy = hmp->voldata.copyinfo[index];
1184                 msg->any.lnk_volconf.mediaid = hmp->voldata.fsid;
1185                 msg->any.lnk_volconf.index = index;
1186                 kdmsg_msg_write(msg);
1187         }
1188 }