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  */
  44
  45 #define _KERNEL_STRUCTURES
  46 #include <sys/param.h>
  47 #include <sys/user.h>
  48 #include <sys/malloc.h>
  49 #include <sys/signalvar.h>
  50 #include <sys/namecache.h>
  51 #include <sys/mount.h>
  52 #include <sys/vnode.h>
  53 #include <sys/buf.h>
  54
  55 #include <vm/vm.h>
  56 #include <vm/vm_page.h>
  57 #include <vm/vm_kern.h>
  58 #include <vm/vm_object.h>
  59 #include <vm/swap_pager.h>
  60 #include <vm/vnode_pager.h>
  61
  62 #include <vfs/ufs/quota.h>
  63 #include <vfs/ufs/inode.h>
  64
  65 #include <stdio.h>
  66 #include <stdlib.h>
  67 #include <string.h>
  68 #include <fcntl.h>
  69 #include <kvm.h>
  70 #include <nlist.h>
  71 #include <getopt.h>
  72
  73 struct nlist Nl[] = {
  74     { "_mountlist" },
  75     { "_vnode_inactive_list" },
  76     { "_vnode_active_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, char *vfc_name);
  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 static const struct dump_private_data {
  90         char vfc_name[MFSNAMELEN];
  91         void (*dumpfn)(kvm_t *, void *);
  92 } dumplist[] = {
  93         { "", NULL }
  94 };
  95
  96 int tracebufs = 0;
  97 int tracelocks = 0;
  98 int withnames = 0;
  99 int fsprivate = 0;
 100
 101 int
 102 main(int ac, char **av)
 103 {
 104     struct mount *mp;
 105     struct vnode *vp;
 106     kvm_t *kd;
 107     int ch;
 108     const char *corefile = NULL;
 109     const char *sysfile = NULL;
 110
 111     while ((ch = getopt(ac, av, "alnbM:N:p")) != -1) {
 112         switch(ch) {
 113         case 'b':
 114             tracebufs = 1;
 115             break;
 116         case 'n':
 117             withnames = 1;
 118             break;
 119         case 'l':
 120             tracelocks = 1;
 121             break;
 122         case 'a':
 123             tracebufs = 1;
 124             tracelocks = 1;
 125             withnames = 1;
 126             fsprivate = 1;
 127             break;
 128         case 'p':
 129             fsprivate = 1;
 130             break;
 131         case 'M':
 132             corefile = optarg;
 133             break;
 134         case 'N':
 135             sysfile = optarg;
 136             break;
 137         default:
 138             fprintf(stderr, "%s [-pbnla] [-M core] [-N system]\n", av[0]);
 139             exit(1);
 140         }
 141     }
 142
 143     if ((kd = kvm_open(sysfile, corefile, NULL, O_RDONLY, "kvm:")) == NULL) {
 144         perror("kvm_open");
 145         exit(1);
 146     }
 147     if (kvm_nlist(kd, Nl) != 0) {
 148         perror("kvm_nlist");
 149         exit(1);
 150     }
 151     kkread(kd, Nl[0].n_value, &mp, sizeof(mp));
 152     while (mp)
 153         mp = dumpmount(kd, mp);
 154     printf("INACTIVELIST {\n");
 155     kkread(kd, Nl[1].n_value, &vp, sizeof(vp));
 156     while (vp)
 157             vp = dumpvp(kd, vp, 0, NULL);
 158     printf("}\n");
 159     printf("ACTIVELIST {\n");
 160     kkread(kd, Nl[2].n_value, &vp, sizeof(vp));
 161     while (vp)
 162             vp = dumpvp(kd, vp, 0, NULL);
 163     printf("}\n");
 164     return(0);
 165 }
 166
 167 static struct mount *
 168 dumpmount(kvm_t *kd, struct mount *mp)
 169 {
 170     struct mount mnt;
 171     struct vnode *vp;
 172     struct vfsconf vfc;
 173
 174     kkread(kd, (u_long)mp, &mnt, sizeof(mnt));
 175     printf("MOUNTPOINT %s on %s {\n",
 176         mnt.mnt_stat.f_mntfromname, mnt.mnt_stat.f_mntonname);
 177     printf("    lk_flags %08x count %08x holder = %p\n",
 178         mnt.mnt_lock.lk_flags, mnt.mnt_lock.lk_count,
 179         mnt.mnt_lock.lk_lockholder);
 180     printf("    mnt_flag %08x mnt_kern_flag %08x\n",
 181         mnt.mnt_flag, mnt.mnt_kern_flag);
 182     printf("    mnt_nvnodelistsize %d\n", mnt.mnt_nvnodelistsize);
 183     printf("    mnt_stat.f_fsid %08x %08x\n", mnt.mnt_stat.f_fsid.val[0],
 184         mnt.mnt_stat.f_fsid.val[1]);
 185
 186     /* Dump fs private node data */
 187     kkread(kd, (u_long)mnt.mnt_vfc, &vfc, sizeof(vfc));
 188     vp = mnt.mnt_nvnodelist.tqh_first;
 189     while (vp)
 190             vp = dumpvp(kd, vp, 1, vfc.vfc_name);
 191
 192     printf("}\n");
 193
 194     return(mnt.mnt_list.tqe_next);
 195 }
 196
 197 static const char *
 198 vtype(enum vtype type)
 199 {
 200     static char buf[32];
 201
 202     switch(type) {
 203     case VNON:
 204         return("VNON");
 205     case VREG:
 206         return("VREG");
 207     case VDIR:
 208         return("VDIR");
 209     case VBLK:
 210         return("VBLK");
 211     case VCHR:
 212         return("VCHR");
 213     case VLNK:
 214         return("VLNK");
 215     case VSOCK:
 216         return("VSOCK");
 217     case VFIFO:
 218         return("VFIFO");
 219     case VBAD:
 220         return("VBAD");
 221     default:
 222         break;
 223     }
 224     snprintf(buf, sizeof(buf), "%d", (int)type);
 225     return(buf);
 226 }
 227
 228 static struct vnode *
 229 dumpvp(kvm_t *kd, struct vnode *vp, int whichlist, char *vfc_name)
 230 {
 231     struct vnode vn;
 232
 233     kkread(kd, (u_long)vp, &vn, sizeof(vn));
 234
 235     printf("    vnode %p.%d refcnt %08x auxcnt %d type=%s flags %08x",
 236         vp, vn.v_state, vn.v_refcnt, vn.v_auxrefs, vtype(vn.v_type), vn.v_flag);
 237
 238     if ((vn.v_flag & VOBJBUF) && vn.v_object) {
 239         int npages = getobjpages(kd, vn.v_object);
 240         int vnpsize = getobjvnpsize(kd, vn.v_object);
 241         if (npages || vnpsize)
 242             printf(" vmobjpgs=%d vnpsize=%d", npages, vnpsize);
 243     }
 244
 245     if (vn.v_flag & VROOT)
 246         printf(" VROOT");
 247     if (vn.v_flag & VTEXT)
 248         printf(" VTEXT");
 249     if (vn.v_flag & VSYSTEM)
 250         printf(" VSYSTEM");
 251     if (vn.v_flag & VISTTY)
 252         printf(" VISTTY");
 253 #ifdef VXLOCK
 254     if (vn.v_flag & VXLOCK)
 255         printf(" VXLOCK");
 256     if (vn.v_flag & VXWANT)
 257         printf(" VXWANT");
 258 #endif
 259 #ifdef VRECLAIMED
 260     if (vn.v_flag & VRECLAIMED)
 261         printf(" VRECLAIMED");
 262     if (vn.v_flag & VINACTIVE)
 263         printf(" VINACTIVE");
 264 #endif
 265     if (vn.v_flag & VOBJBUF)
 266         printf(" VOBJBUF");
 267 #ifdef VSWAPCACHE
 268     if (vn.v_flag & VSWAPCACHE)
 269         printf(" VSWAPCACHE");
 270 #endif
 271     switch(vn.v_flag & (VAGE0 | VAGE1)) {
 272     case 0:
 273         printf(" VAGE0");
 274         break;
 275     case VAGE0:
 276         printf(" VAGE1");
 277         break;
 278     case VAGE1:
 279         printf(" VAGE2");
 280         break;
 281     case VAGE0 | VAGE1:
 282         printf(" VAGE3");
 283         break;
 284     }
 285 #ifdef VDOOMED
 286     if (vn.v_flag & VDOOMED)
 287         printf(" VDOOMED");
 288 #endif
 289 #ifdef VINFREE
 290     if (vn.v_flag & VINFREE)
 291         printf(" VINFREE");
 292 #endif
 293     if (vn.v_flag & VONWORKLST)
 294         printf(" VONWORKLST");
 295     if (vn.v_flag & VOBJDIRTY)
 296         printf(" VOBJDIRTY");
 297     if (vn.v_flag & VMAYHAVELOCKS)
 298         printf(" VMAYHAVELOCKS");
 299
 300     printf("\n");
 301
 302     if (vn.v_lock.lk_count || vn.v_lock.lk_lockholder != LK_NOTHREAD) {
 303         printf("\tlk_flags %08x count %08x holder = %p\n",
 304             vn.v_lock.lk_flags, vn.v_lock.lk_count,
 305             vn.v_lock.lk_lockholder);
 306     }
 307
 308     if (withnames && TAILQ_FIRST(&vn.v_namecache)) {
 309         struct namecache ncp;
 310         int nlen;
 311         char buf[1024];
 312
 313         kkread(kd, (u_long)TAILQ_FIRST(&vn.v_namecache), &ncp, sizeof(ncp));
 314         if ((nlen = ncp.nc_nlen) >= sizeof(buf))
 315                 nlen = sizeof(buf) - 1;
 316         if (nlen < 0)
 317                 nlen = 0;
 318         if (nlen) {
 319                 kkread(kd, (u_long)ncp.nc_name, buf, nlen);
 320                 buf[nlen] = 0;
 321                 printf("\tfilename %s\n", buf);
 322         }
 323     }
 324
 325     if (tracebufs) {
 326         if (vn.v_rbclean_tree.rbh_root) {
 327             printf("\tCLEAN BUFFERS\n");
 328             dumpbufs(kd, vn.v_rbclean_tree.rbh_root, "ROOT");
 329         }
 330         if (vn.v_rbdirty_tree.rbh_root) {
 331             printf("\tDIRTY BUFFERS\n");
 332             dumpbufs(kd, vn.v_rbdirty_tree.rbh_root, "ROOT");
 333         }
 334     }
 335
 336     if (tracelocks) {
 337         if (vn.v_tag == VT_UFS && vn.v_data) {
 338             struct inode *ip = vn.v_data;
 339             struct lockf lockf;
 340
 341             kkread(kd, (u_long)&ip->i_lockf, &lockf, sizeof(lockf));
 342             dumplocks(kd, &lockf);
 343         }
 344     }
 345
 346     if (fsprivate && vfc_name) {
 347             /*
 348              * Actually find whether the filesystem can dump
 349              * detailed inode information out of the vnode
 350              */
 351             const struct dump_private_data *dpd;
 352
 353             for (dpd = dumplist; dpd->dumpfn != NULL; dpd++) {
 354                     if ((strcmp(dpd->vfc_name, vfc_name) == 0) &&
 355                         vn.v_data != NULL)
 356                             dpd->dumpfn(kd, vn.v_data);
 357             }
 358     }
 359
 360     if (whichlist)
 361         return(vn.v_nmntvnodes.tqe_next);
 362     else
 363         return(vn.v_list.tqe_next);
 364 }
 365
 366 static void
 367 dumpbufs(kvm_t *kd, void *bufp, const char *id)
 368 {
 369         struct buf buf;
 370
 371         kkread(kd, (u_long)bufp, &buf, sizeof(buf));
 372         printf("\t    %-8s %p loffset %012lx/%05x foffset %08lx",
 373                 id, bufp,
 374                 buf.b_bio1.bio_offset,
 375                 buf.b_bufsize,
 376                 buf.b_bio2.bio_offset);
 377         printf(" q=%d count=%08x flags=%08x refs=%08x dep=%p",
 378                 buf.b_qindex, buf.b_lock.lk_count,
 379                 buf.b_flags, buf.b_refs, buf.b_dep.lh_first);
 380         printf("\n");
 381
 382         if (buf.b_rbnode.rbe_left)
 383             dumpbufs(kd, buf.b_rbnode.rbe_left, "LEFT");
 384         if (buf.b_rbnode.rbe_right)
 385             dumpbufs(kd, buf.b_rbnode.rbe_right, "RIGHT");
 386 }
 387
 388 static void
 389 dumplocks(kvm_t *kd, struct lockf *lockf)
 390 {
 391         struct lockf_range item;
 392         struct lockf_range *scan;
 393
 394         if ((scan = TAILQ_FIRST(&lockf->lf_range)) != NULL) {
 395                 printf("\tLOCKS\n");
 396                 do {
 397                         kkread(kd, (u_long)scan, &item, sizeof(item));
 398                         dumplockinfo(kd, &item);
 399                 } while ((scan = TAILQ_NEXT(&item, lf_link)) != NULL);
 400                 printf("\n");
 401         }
 402         if ((scan = TAILQ_FIRST(&lockf->lf_blocked)) != NULL) {
 403                 printf("\tBLKED\n");
 404                 do {
 405                         kkread(kd, (u_long)scan, &item, sizeof(item));
 406                         dumplockinfo(kd, &item);
 407                 } while ((scan = TAILQ_NEXT(&item, lf_link)) != NULL);
 408                 printf("\n");
 409         }
 410
 411 }
 412
 413 static void
 414 dumplockinfo(kvm_t *kd, struct lockf_range *item)
 415 {
 416         int ownerpid;
 417
 418         if (item->lf_owner && (item->lf_flags & F_POSIX)) {
 419                 kkread(kd, (u_long)&item->lf_owner->p_pid,
 420                         &ownerpid, sizeof(ownerpid));
 421         } else {
 422                 ownerpid = -1;
 423         }
 424
 425         printf("\t    ty=%d flgs=%04x %ld-%ld owner=%d\n",
 426                 item->lf_type, item->lf_flags,
 427                 item->lf_start, item->lf_end,
 428                 ownerpid
 429         );
 430 }
 431
 432 static
 433 int
 434 getobjpages(kvm_t *kd, struct vm_object *obj)
 435 {
 436         struct vm_object vmobj;
 437
 438         kkread(kd, (u_long)obj, &vmobj, sizeof(vmobj));
 439         return(vmobj.resident_page_count);
 440 }
 441
 442 static
 443 int
 444 getobjvnpsize(kvm_t *kd, struct vm_object *obj)
 445 {
 446         struct vm_object vmobj;
 447
 448         kkread(kd, (u_long)obj, &vmobj, sizeof(vmobj));
 449         return ((int)vmobj.size);
 450 }
 451
 452 static void
 453 kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes)
 454 {
 455     if (kvm_read(kd, addr, buf, nbytes) != nbytes) {
 456         perror("kvm_read");
 457         exit(1);
 458     }
 459 }