4 * cc -I/usr/src/sys ncptrace.c -o /usr/local/bin/ncptrace -lkvm
9 * Trace and dump the kernel namecache hierarchy. If a path is specified
10 * the trace begins there, otherwise the trace begins at the root.
12 * $DragonFly: src/test/debug/ncptrace.c,v 1.1 2004/10/03 06:12:34 dillon Exp $
15 #define _KERNEL_STRUCTURES_
16 #include <sys/param.h>
18 #include <sys/malloc.h>
19 #include <sys/signalvar.h>
20 #include <sys/vnode.h>
21 #include <sys/namecache.h>
24 #include <vm/vm_page.h>
25 #include <vm/vm_kern.h>
26 #include <vm/swap_pager.h>
27 #include <vm/vnode_pager.h>
41 void kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes);
42 void dumpncp(kvm_t *kd, int tab, struct namecache *ncptr, const char *path);
44 main(int ac, char **av)
46 struct namecache *ncptr;
50 if ((kd = kvm_open(NULL, NULL, NULL, O_RDONLY, "kvm:")) == NULL) {
54 if (kvm_nlist(kd, Nl) != 0) {
58 kkread(kd, Nl[0].n_value, &ncptr, sizeof(ncptr));
60 dumpncp(kd, 0, ncptr, NULL);
62 for (i = 1; i < ac; ++i) {
64 fprintf(stderr, "%s: path must start at the root\n", av[i]);
65 dumpncp(kd, 0, ncptr, av[i]);
71 dumpncp(kvm_t *kd, int tab, struct namecache *ncptr, const char *path)
74 struct namecache *ncscan;
79 kkread(kd, (u_long)ncptr, &ncp, sizeof(ncp));
80 if (ncp.nc_nlen < sizeof(name)) {
81 kkread(kd, (u_long)ncp.nc_name, name, ncp.nc_nlen);
82 name[ncp.nc_nlen] = 0;
90 } else if (ncp.nc_flag & NCF_MOUNTPT) {
91 strcpy(name, "MOUNTGLUE");
92 } else if (name[0] == 0) {
97 if ((ptr = strchr(path, '/')) == NULL)
98 ptr = path + strlen(path);
99 if (strlen(name) != ptr - path ||
100 bcmp(name, path, ptr - path) != 0
111 if (ncp.nc_list.tqh_first)
117 printf("ELM [ncp=%p par=%p %04x vp=%p] %s\n",
118 ncptr, ncp.nc_parent, ncp.nc_flag,
121 printf("%*.*s%s [ncp=%p par=%p %04x vp=%p]%s\n", tab, tab, "", name,
122 ncptr, ncp.nc_parent, ncp.nc_flag, ncp.nc_vp,
123 haschildren ? " {" : "");
125 for (ncscan = ncp.nc_list.tqh_first; ncscan; ncscan = ncp.nc_entry.tqe_next) {
126 kkread(kd, (u_long)ncscan, &ncp, sizeof(ncp));
127 dumpncp(kd, (path ? (tab ? tab : 4) : tab + 4), ncscan, path);
129 if (haschildren && path == NULL)
130 printf("%*.*s}\n", tab, tab, "");
134 kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes)
136 if (kvm_read(kd, addr, buf, nbytes) != nbytes) {