test/debug/vnodeinfo.c

   1 /*
   2  * VNODEINFO.C
   3  *
   4  * cc -I/usr/src/sys vnodeinfo.c -o /usr/local/bin/vnodeinfo -lkvm
   5  *
   6  * vnodeinfo
   7  *
   8  * Dump the mountlist and related vnodes.
   9  *
  10  *
  11  * Copyright (c) 2004 The DragonFly Project.  All rights reserved.
  12  *
  13  * This code is derived from software contributed to The DragonFly Project
  14  * by Matthew Dillon <dillon@backplane.com>
  15  *
  16  * Redistribution and use in source and binary forms, with or without
  17  * modification, are permitted provided that the following conditions
  18  * are met:
  19  *
  20  * 1. Redistributions of source code must retain the above copyright
  21  *    notice, this list of conditions and the following disclaimer.
  22  * 2. Redistributions in binary form must reproduce the above copyright
  23  *    notice, this list of conditions and the following disclaimer in
  24  *    the documentation and/or other materials provided with the
  25  *    distribution.
  26  * 3. Neither the name of The DragonFly Project nor the names of its
  27  *    contributors may be used to endorse or promote products derived
  28  *    from this software without specific, prior written permission.
  29  *
  30  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  31  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  32  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  33  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  34  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  35  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  36  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  37  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  38  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  39  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  40  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  41  * SUCH DAMAGE.
  42  *
  43  * $DragonFly: src/test/debug/vnodeinfo.c,v 1.13 2007/05/06 20:45:01 dillon Exp $
  44  */
  45
  46 #define _KERNEL_STRUCTURES
  47 #include <sys/param.h>
  48 #include <sys/user.h>
  49 #include <sys/malloc.h>
  50 #include <sys/signalvar.h>
  51 #include <sys/namecache.h>
  52 #include <sys/mount.h>
  53 #include <sys/vnode.h>
  54 #include <sys/buf.h>
  55
  56 #include <vm/vm.h>
  57 #include <vm/vm_page.h>
  58 #include <vm/vm_kern.h>
  59 #include <vm/vm_object.h>
  60 #include <vm/swap_pager.h>
  61 #include <vm/vnode_pager.h>
  62
  63 #include <vfs/ufs/quota.h>
  64 #include <vfs/ufs/inode.h>
  65
  66 #include <stdio.h>
  67 #include <stdlib.h>
  68 #include <string.h>
  69 #include <fcntl.h>
  70 #include <kvm.h>
  71 #include <nlist.h>
  72 #include <getopt.h>
  73
  74 struct nlist Nl[] = {
  75     { "_mountlist" },
  76     { "_vnode_free_list" },
  77     { NULL }
  78 };
  79
  80 static void kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes);
  81 static struct mount *dumpmount(kvm_t *kd, struct mount *mp);
  82 static struct vnode *dumpvp(kvm_t *kd, struct vnode *vp, int whichlist);
  83 static void dumpbufs(kvm_t *kd, void *bufp, const char *id);
  84 static void dumplocks(kvm_t *kd, struct lockf *lockf);
  85 static void dumplockinfo(kvm_t *kd, struct lockf_range *item);
  86 static int getobjpages(kvm_t *kd, struct vm_object *obj);
  87 static int getobjvnpsize(kvm_t *kd, struct vm_object *obj);
  88
  89 int tracebufs = 0;
  90 int tracelocks = 0;
  91 int withnames = 0;
  92
  93 int
  94 main(int ac, char **av)
  95 {
  96     struct mount *mp;
  97     struct vnode *vp;
  98     kvm_t *kd;
  99     int i;
 100     int ch;
 101     const char *corefile = NULL;
 102     const char *sysfile = NULL;
 103
 104     while ((ch = getopt(ac, av, "alnbM:N:")) != -1) {
 105         switch(ch) {
 106         case 'b':
 107             tracebufs = 1;
 108             break;
 109         case 'n':
 110             withnames = 1;
 111             break;
 112         case 'l':
 113             tracelocks = 1;
 114             break;
 115         case 'a':
 116             tracebufs = 1;
 117             tracelocks = 1;
 118             withnames = 1;
 119             break;
 120         case 'M':
 121             corefile = optarg;
 122             break;
 123         case 'N':
 124             sysfile = optarg;
 125             break;
 126         default:
 127             fprintf(stderr, "%s [-M core] [-N system]\n", av[0]);
 128             exit(1);
 129         }
 130     }
 131
 132     if ((kd = kvm_open(sysfile, corefile, NULL, O_RDONLY, "kvm:")) == NULL) {
 133         perror("kvm_open");
 134         exit(1);
 135     }
 136     if (kvm_nlist(kd, Nl) != 0) {
 137         perror("kvm_nlist");
 138         exit(1);
 139     }
 140     kkread(kd, Nl[0].n_value, &mp, sizeof(mp));
 141     while (mp)
 142         mp = dumpmount(kd, mp);
 143     kkread(kd, Nl[1].n_value, &vp, sizeof(vp));
 144     printf("VNODEFREELIST {\n");
 145     while (vp)
 146         vp = dumpvp(kd, vp, 0);
 147     printf("}\n");
 148     return(0);
 149 }
 150
 151 static struct mount *
 152 dumpmount(kvm_t *kd, struct mount *mp)
 153 {
 154     struct mount mnt;
 155     struct vnode *vp;
 156
 157     kkread(kd, (u_long)mp, &mnt, sizeof(mnt));
 158     printf("MOUNTPOINT %s on %s {\n",
 159         mnt.mnt_stat.f_mntfromname, mnt.mnt_stat.f_mntonname);
 160     printf("    lk_flags %08x share %d wait %d excl %d holder = %p\n",
 161         mnt.mnt_lock.lk_flags, mnt.mnt_lock.lk_sharecount,
 162         mnt.mnt_lock.lk_waitcount, mnt.mnt_lock.lk_exclusivecount,
 163         mnt.mnt_lock.lk_lockholder);
 164     printf("    mnt_flag %08x mnt_kern_flag %08x\n",
 165         mnt.mnt_flag, mnt.mnt_kern_flag);
 166     printf("    mnt_nvnodelistsize %d\n", mnt.mnt_nvnodelistsize);
 167     printf("    mnt_stat.f_fsid %08x %08x\n", mnt.mnt_stat.f_fsid.val[0],
 168         mnt.mnt_stat.f_fsid.val[1]);
 169     vp = mnt.mnt_nvnodelist.tqh_first;
 170     while (vp)
 171         vp = dumpvp(kd, vp, 1);
 172
 173     printf("}\n");
 174
 175     return(mnt.mnt_list.tqe_next);
 176 }
 177
 178 static const char *
 179 vtype(enum vtype type)
 180 {
 181     static char buf[32];
 182
 183     switch(type) {
 184     case VNON:
 185         return("VNON");
 186     case VREG:
 187         return("VREG");
 188     case VDIR:
 189         return("VDIR");
 190     case VBLK:
 191         return("VBLK");
 192     case VCHR:
 193         return("VCHR");
 194     case VLNK:
 195         return("VLNK");
 196     case VSOCK:
 197         return("VSOCK");
 198     case VFIFO:
 199         return("VFIFO");
 200     case VBAD:
 201         return("VBAD");
 202     default:
 203         break;
 204     }
 205     snprintf(buf, sizeof(buf), "%d", (int)type);
 206     return(buf);
 207 }
 208
 209 static struct vnode *
 210 dumpvp(kvm_t *kd, struct vnode *vp, int whichlist)
 211 {
 212     struct vnode vn;
 213
 214     kkread(kd, (u_long)vp, &vn, sizeof(vn));
 215
 216     printf("    vnode %p usecnt %08x holdcnt %d type=%s flags %08x",
 217         vp, vn.v_sysref.refcnt, vn.v_auxrefs, vtype(vn.v_type), vn.v_flag);
 218
 219     if ((vn.v_flag & VOBJBUF) && vn.v_object) {
 220         int npages = getobjpages(kd, vn.v_object);
 221         int vnpsize = getobjvnpsize(kd, vn.v_object);
 222         if (npages || vnpsize)
 223             printf(" vmobjpgs=%d vnpsize=%d", npages, vnpsize);
 224     }
 225
 226     if (vn.v_flag & VROOT)
 227         printf(" VROOT");
 228     if (vn.v_flag & VTEXT)
 229         printf(" VTEXT");
 230     if (vn.v_flag & VSYSTEM)
 231         printf(" VSYSTEM");
 232     if (vn.v_flag & VISTTY)
 233         printf(" VISTTY");
 234 #ifdef VXLOCK
 235     if (vn.v_flag & VXLOCK)
 236         printf(" VXLOCK");
 237     if (vn.v_flag & VXWANT)
 238         printf(" VXWANT");
 239 #endif
 240 #ifdef VRECLAIMED
 241     if (vn.v_flag & VRECLAIMED)
 242         printf(" VRECLAIMED");
 243     if (vn.v_flag & VINACTIVE)
 244         printf(" VINACTIVE");
 245 #endif
 246     if (vn.v_flag & VOBJBUF)
 247         printf(" VOBJBUF");
 248     if (vn.v_flag & VAGE)
 249         printf(" VAGE");
 250     if (vn.v_flag & VOLOCK)
 251         printf(" VOLOCK");
 252     if (vn.v_flag & VOWANT)
 253         printf(" VOWANT");
 254 #ifdef VDOOMED
 255     if (vn.v_flag & VDOOMED)
 256         printf(" VDOOMED");
 257 #endif
 258     if (vn.v_flag & VFREE)
 259         printf(" VFREE");
 260     if (vn.v_flag & VCACHED)
 261         printf(" VCACHED");
 262 #ifdef VINFREE
 263     if (vn.v_flag & VINFREE)
 264         printf(" VINFREE");
 265 #endif
 266     if (vn.v_flag & VONWORKLST)
 267         printf(" VONWORKLST");
 268     if (vn.v_flag & VMOUNT)
 269         printf(" VMOUNT");
 270     if (vn.v_flag & VOBJDIRTY)
 271         printf(" VOBJDIRTY");
 272     if (vn.v_flag & VMAYHAVELOCKS)
 273         printf(" VMAYHAVELOCKS");
 274
 275     printf("\n");
 276
 277     if (vn.v_lock.lk_sharecount || vn.v_lock.lk_waitcount ||
 278         vn.v_lock.lk_exclusivecount || vn.v_lock.lk_lockholder != LK_NOTHREAD) {
 279         printf("\tlk_flags %08x share %d wait %d excl %d holder = %p\n",
 280             vn.v_lock.lk_flags, vn.v_lock.lk_sharecount,
 281             vn.v_lock.lk_waitcount, vn.v_lock.lk_exclusivecount,
 282             vn.v_lock.lk_lockholder);
 283     }
 284
 285     if (withnames && TAILQ_FIRST(&vn.v_namecache)) {
 286         struct namecache ncp;
 287         int nlen;
 288         char buf[1024];
 289
 290         kkread(kd, (u_long)TAILQ_FIRST(&vn.v_namecache), &ncp, sizeof(ncp));
 291         if ((nlen = ncp.nc_nlen) >= sizeof(buf))
 292                 nlen = sizeof(buf) - 1;
 293         if (nlen < 0)
 294                 nlen = 0;
 295         if (nlen) {
 296                 kkread(kd, (u_long)ncp.nc_name, buf, nlen);
 297                 buf[nlen] = 0;
 298                 printf("\tfilename %s\n", buf);
 299         }
 300     }
 301
 302     if (tracebufs) {
 303         if (vn.v_rbclean_tree.rbh_root) {
 304             printf("\tCLEAN BUFFERS\n");
 305             dumpbufs(kd, vn.v_rbclean_tree.rbh_root, "ROOT");
 306         }
 307         if (vn.v_rbdirty_tree.rbh_root) {
 308             printf("\tDIRTY BUFFERS\n");
 309             dumpbufs(kd, vn.v_rbdirty_tree.rbh_root, "ROOT");
 310         }
 311     }
 312
 313     if (tracelocks) {
 314         if (vn.v_tag == VT_UFS && vn.v_data) {
 315             struct inode *ip = vn.v_data;
 316             struct lockf lockf;
 317
 318             kkread(kd, (u_long)&ip->i_lockf, &lockf, sizeof(lockf));
 319             dumplocks(kd, &lockf);
 320         }
 321     }
 322
 323
 324     if (whichlist)
 325         return(vn.v_nmntvnodes.tqe_next);
 326     else
 327         return(vn.v_freelist.tqe_next);
 328 }
 329
 330 static void
 331 dumpbufs(kvm_t *kd, void *bufp, const char *id)
 332 {
 333         struct buf buf;
 334
 335         kkread(kd, (u_long)bufp, &buf, sizeof(buf));
 336         printf("\t    %-8s %p loffset %08llx foffset %08llx\n",
 337                 id, bufp,
 338                 buf.b_bio1.bio_offset,
 339                 buf.b_bio2.bio_offset);
 340
 341         if (buf.b_rbnode.rbe_left)
 342             dumpbufs(kd, buf.b_rbnode.rbe_left, "LEFT");
 343         if (buf.b_rbnode.rbe_right)
 344             dumpbufs(kd, buf.b_rbnode.rbe_right, "RIGHT");
 345 }
 346
 347 static void
 348 dumplocks(kvm_t *kd, struct lockf *lockf)
 349 {
 350         struct lockf_range item;
 351         struct lockf_range *scan;
 352
 353         if ((scan = TAILQ_FIRST(&lockf->lf_range)) != NULL) {
 354                 printf("\tLOCKS\n");
 355                 do {
 356                         kkread(kd, (u_long)scan, &item, sizeof(item));
 357                         dumplockinfo(kd, &item);
 358                 } while ((scan = TAILQ_NEXT(&item, lf_link)) != NULL);
 359                 printf("\n");
 360         }
 361         if ((scan = TAILQ_FIRST(&lockf->lf_blocked)) != NULL) {
 362                 printf("\tBLKED\n");
 363                 do {
 364                         kkread(kd, (u_long)scan, &item, sizeof(item));
 365                         dumplockinfo(kd, &item);
 366                 } while ((scan = TAILQ_NEXT(&item, lf_link)) != NULL);
 367                 printf("\n");
 368         }
 369
 370 }
 371
 372 static void
 373 dumplockinfo(kvm_t *kd, struct lockf_range *item)
 374 {
 375         int ownerpid;
 376
 377         if (item->lf_owner && (item->lf_flags & F_POSIX)) {
 378                 kkread(kd, (u_long)&item->lf_owner->p_pid,
 379                         &ownerpid, sizeof(ownerpid));
 380         } else {
 381                 ownerpid = -1;
 382         }
 383
 384         printf("\t    ty=%d flgs=%04x %lld-%lld owner=%d\n",
 385                 item->lf_type, item->lf_flags,
 386                 item->lf_start, item->lf_end,
 387                 ownerpid
 388         );
 389 }
 390
 391 static
 392 int
 393 getobjpages(kvm_t *kd, struct vm_object *obj)
 394 {
 395         struct vm_object vmobj;
 396
 397         kkread(kd, (u_long)obj, &vmobj, sizeof(vmobj));
 398         return(vmobj.resident_page_count);
 399 }
 400
 401 static
 402 int
 403 getobjvnpsize(kvm_t *kd, struct vm_object *obj)
 404 {
 405         struct vm_object vmobj;
 406
 407         kkread(kd, (u_long)obj, &vmobj, sizeof(vmobj));
 408         return ((int)vmobj.size);
 409 }
 410
 411 static void
 412 kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes)
 413 {
 414     if (kvm_read(kd, addr, buf, nbytes) != nbytes) {
 415         perror("kvm_read");
 416         exit(1);
 417     }
 418 }
 419