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 1.6 2005/04/06 18:40:25 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/mount.h>
  52 #include <sys/vnode.h>
  53
  54 #include <vm/vm.h>
  55 #include <vm/vm_page.h>
  56 #include <vm/vm_kern.h>
  57 #include <vm/vm_object.h>
  58 #include <vm/swap_pager.h>
  59 #include <vm/vnode_pager.h>
  60
  61 #include <stdio.h>
  62 #include <stdlib.h>
  63 #include <string.h>
  64 #include <fcntl.h>
  65 #include <kvm.h>
  66 #include <nlist.h>
  67 #include <getopt.h>
  68
  69 struct nlist Nl[] = {
  70     { "_mountlist" },
  71     { "_vnode_free_list" },
  72     { NULL }
  73 };
  74
  75 static void kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes);
  76 static struct mount *dumpmount(kvm_t *kd, struct mount *mp);
  77 static struct vnode *dumpvp(kvm_t *kd, struct vnode *vp, int whichlist);
  78 static int getobjpages(kvm_t *kd, struct vm_object *obj);
  79 static int getobjvnpsize(kvm_t *kd, struct vm_object *obj);
  80
  81 main(int ac, char **av)
  82 {
  83     struct mount *mp;
  84     struct vnode *vp;
  85     kvm_t *kd;
  86     int i;
  87     int ch;
  88     const char *corefile = NULL;
  89     const char *sysfile = NULL;
  90
  91     while ((ch = getopt(ac, av, "M:N:")) != -1) {
  92         switch(ch) {
  93         case 'M':
  94             corefile = optarg;
  95             break;
  96         case 'N':
  97             sysfile = optarg;
  98             break;
  99         default:
 100             fprintf(stderr, "%s [-M core] [-N system]\n", av[0]);
 101             exit(1);
 102         }
 103     }
 104
 105     if ((kd = kvm_open(sysfile, corefile, NULL, O_RDONLY, "kvm:")) == NULL) {
 106         perror("kvm_open");
 107         exit(1);
 108     }
 109     if (kvm_nlist(kd, Nl) != 0) {
 110         perror("kvm_nlist");
 111         exit(1);
 112     }
 113     kkread(kd, Nl[0].n_value, &mp, sizeof(mp));
 114     while (mp)
 115         mp = dumpmount(kd, mp);
 116     kkread(kd, Nl[1].n_value, &vp, sizeof(vp));
 117     printf("VNODEFREELIST {\n");
 118     while (vp)
 119         vp = dumpvp(kd, vp, 0);
 120     printf("}\n");
 121     return(0);
 122 }
 123
 124 static struct mount *
 125 dumpmount(kvm_t *kd, struct mount *mp)
 126 {
 127     struct mount mnt;
 128     struct vnode *vp;
 129
 130     kkread(kd, (u_long)mp, &mnt, sizeof(mnt));
 131     printf("MOUNTPOINT %s on %s {\n",
 132         mnt.mnt_stat.f_mntfromname, mnt.mnt_stat.f_mntonname);
 133     printf("    lk_flags %08x share %d wait %d excl %d holder = %p\n",
 134         mnt.mnt_lock.lk_flags, mnt.mnt_lock.lk_sharecount,
 135         mnt.mnt_lock.lk_waitcount, mnt.mnt_lock.lk_exclusivecount,
 136         mnt.mnt_lock.lk_lockholder);
 137     printf("    mnt_flag %08x mnt_kern_flag %08x\n",
 138         mnt.mnt_flag, mnt.mnt_kern_flag);
 139     printf("    mnt_nvnodelistsize %d\n", mnt.mnt_nvnodelistsize);
 140     printf("    mnt_stat.f_fsid %08x %08x\n", mnt.mnt_stat.f_fsid.val[0],
 141         mnt.mnt_stat.f_fsid.val[1]);
 142     vp = mnt.mnt_nvnodelist.tqh_first;
 143     while (vp)
 144         vp = dumpvp(kd, vp, 1);
 145
 146     printf("}\n");
 147
 148     return(mnt.mnt_list.tqe_next);
 149 }
 150
 151 static const char *
 152 vtype(enum vtype type)
 153 {
 154     static char buf[32];
 155
 156     switch(type) {
 157     case VNON:
 158         return("VNON");
 159     case VREG:
 160         return("VREG");
 161     case VDIR:
 162         return("VDIR");
 163     case VBLK:
 164         return("VBLK");
 165     case VCHR:
 166         return("VCHR");
 167     case VLNK:
 168         return("VLNK");
 169     case VSOCK:
 170         return("VSOCK");
 171     case VFIFO:
 172         return("VFIFO");
 173     case VBAD:
 174         return("VBAD");
 175     default:
 176         break;
 177     }
 178     snprintf(buf, sizeof(buf), "%d", (int)type);
 179     return(buf);
 180 }
 181
 182 static struct vnode *
 183 dumpvp(kvm_t *kd, struct vnode *vp, int whichlist)
 184 {
 185     struct vnode vn;
 186
 187     kkread(kd, (u_long)vp, &vn, sizeof(vn));
 188
 189     printf("    vnode %p usecnt %d holdcnt %d type=%s flags %08x",
 190         vp, vn.v_usecount, vn.v_holdcnt, vtype(vn.v_type), vn.v_flag);
 191
 192     if ((vn.v_flag & VOBJBUF) && vn.v_object) {
 193         int npages = getobjpages(kd, vn.v_object);
 194         int vnpsize = getobjvnpsize(kd, vn.v_object);
 195         if (npages || vnpsize)
 196             printf(" vmobjpgs=%d vnpsize=%d", npages, vnpsize);
 197     }
 198
 199     if (vn.v_flag & VROOT)
 200         printf(" VROOT");
 201     if (vn.v_flag & VTEXT)
 202         printf(" VTEXT");
 203     if (vn.v_flag & VSYSTEM)
 204         printf(" VSYSTEM");
 205     if (vn.v_flag & VISTTY)
 206         printf(" VISTTY");
 207 #ifdef VXLOCK
 208     if (vn.v_flag & VXLOCK)
 209         printf(" VXLOCK");
 210     if (vn.v_flag & VXWANT)
 211         printf(" VXWANT");
 212 #endif
 213 #ifdef VRECLAIMED
 214     if (vn.v_flag & VRECLAIMED)
 215         printf(" VRECLAIMED");
 216     if (vn.v_flag & VINACTIVE)
 217         printf(" VINACTIVE");
 218 #endif
 219     if (vn.v_flag & VBWAIT)
 220         printf(" VBWAIT");
 221     if (vn.v_flag & VOBJBUF)
 222         printf(" VOBJBUF");
 223     if (vn.v_flag & VAGE)
 224         printf(" VAGE");
 225     if (vn.v_flag & VOLOCK)
 226         printf(" VOLOCK");
 227     if (vn.v_flag & VOWANT)
 228         printf(" VOWANT");
 229 #ifdef VDOOMED
 230     if (vn.v_flag & VDOOMED)
 231         printf(" VDOOMED");
 232 #endif
 233     if (vn.v_flag & VFREE)
 234         printf(" VFREE");
 235 #ifdef VINFREE
 236     if (vn.v_flag & VINFREE)
 237         printf(" VINFREE");
 238 #endif
 239     if (vn.v_flag & VONWORKLST)
 240         printf(" VONWORKLST");
 241     if (vn.v_flag & VMOUNT)
 242         printf(" VMOUNT");
 243     if (vn.v_flag & VOBJDIRTY)
 244         printf(" VOBJDIRTY");
 245     if (vn.v_flag & VPLACEMARKER)
 246         printf(" VPLACEMARKER");
 247
 248     printf("\n");
 249
 250     if (vn.v_lock.lk_sharecount || vn.v_lock.lk_waitcount ||
 251         vn.v_lock.lk_exclusivecount || vn.v_lock.lk_lockholder != LK_NOTHREAD) {
 252         printf("\tlk_flags %08x share %d wait %d excl %d holder = %p\n",
 253             vn.v_lock.lk_flags, vn.v_lock.lk_sharecount,
 254             vn.v_lock.lk_waitcount, vn.v_lock.lk_exclusivecount,
 255             vn.v_lock.lk_lockholder);
 256     }
 257
 258     if (whichlist)
 259         return(vn.v_nmntvnodes.tqe_next);
 260     else
 261         return(vn.v_freelist.tqe_next);
 262 }
 263
 264 static
 265 int
 266 getobjpages(kvm_t *kd, struct vm_object *obj)
 267 {
 268         struct vm_object vmobj;
 269
 270         kkread(kd, (u_long)obj, &vmobj, sizeof(vmobj));
 271         return(vmobj.resident_page_count);
 272 }
 273
 274 static
 275 int
 276 getobjvnpsize(kvm_t *kd, struct vm_object *obj)
 277 {
 278         struct vm_object vmobj;
 279
 280         kkread(kd, (u_long)obj, &vmobj, sizeof(vmobj));
 281         return(vmobj.un_pager.vnp.vnp_size);
 282 }
 283
 284 static void
 285 kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes)
 286 {
 287     if (kvm_read(kd, addr, buf, nbytes) != nbytes) {
 288         perror("kvm_read");
 289         exit(1);
 290     }
 291 }
 292