xref: /dragonfly/test/debug/vnodeinfo.c (revision 99dd49c5)
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 %012llx foffset %08llx",
337 		id, bufp,
338 		buf.b_bio1.bio_offset,
339 		buf.b_bio2.bio_offset);
340 	printf(" q=%d lck=%d/%d flags=%08x dep=%p",
341 		buf.b_qindex, buf.b_lock.lk_sharecount,
342 		buf.b_lock.lk_exclusivecount,
343 		buf.b_flags, buf.b_dep.lh_first);
344 	printf("\n");
345 
346 	if (buf.b_rbnode.rbe_left)
347 	    dumpbufs(kd, buf.b_rbnode.rbe_left, "LEFT");
348 	if (buf.b_rbnode.rbe_right)
349 	    dumpbufs(kd, buf.b_rbnode.rbe_right, "RIGHT");
350 }
351 
352 static void
353 dumplocks(kvm_t *kd, struct lockf *lockf)
354 {
355 	struct lockf_range item;
356 	struct lockf_range *scan;
357 
358 	if ((scan = TAILQ_FIRST(&lockf->lf_range)) != NULL) {
359 		printf("\tLOCKS\n");
360 		do {
361 			kkread(kd, (u_long)scan, &item, sizeof(item));
362 			dumplockinfo(kd, &item);
363 		} while ((scan = TAILQ_NEXT(&item, lf_link)) != NULL);
364 		printf("\n");
365 	}
366 	if ((scan = TAILQ_FIRST(&lockf->lf_blocked)) != NULL) {
367 		printf("\tBLKED\n");
368 		do {
369 			kkread(kd, (u_long)scan, &item, sizeof(item));
370 			dumplockinfo(kd, &item);
371 		} while ((scan = TAILQ_NEXT(&item, lf_link)) != NULL);
372 		printf("\n");
373 	}
374 
375 }
376 
377 static void
378 dumplockinfo(kvm_t *kd, struct lockf_range *item)
379 {
380 	int ownerpid;
381 
382 	if (item->lf_owner && (item->lf_flags & F_POSIX)) {
383 		kkread(kd, (u_long)&item->lf_owner->p_pid,
384 			&ownerpid, sizeof(ownerpid));
385 	} else {
386 		ownerpid = -1;
387 	}
388 
389 	printf("\t    ty=%d flgs=%04x %lld-%lld owner=%d\n",
390 		item->lf_type, item->lf_flags,
391 		item->lf_start, item->lf_end,
392 		ownerpid
393 	);
394 }
395 
396 static
397 int
398 getobjpages(kvm_t *kd, struct vm_object *obj)
399 {
400 	struct vm_object vmobj;
401 
402 	kkread(kd, (u_long)obj, &vmobj, sizeof(vmobj));
403 	return(vmobj.resident_page_count);
404 }
405 
406 static
407 int
408 getobjvnpsize(kvm_t *kd, struct vm_object *obj)
409 {
410 	struct vm_object vmobj;
411 
412 	kkread(kd, (u_long)obj, &vmobj, sizeof(vmobj));
413 	return ((int)vmobj.size);
414 }
415 
416 static void
417 kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes)
418 {
419     if (kvm_read(kd, addr, buf, nbytes) != nbytes) {
420         perror("kvm_read");
421         exit(1);
422     }
423 }
424 
425