[src/trunk]: src/lib/libp2k In case of a P2K_DEBUG mount, dump mount point co...

[pooka <pooka%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/58ba03c1b575
branches:  trunk
changeset: 760565:58ba03c1b575
user:      pooka <pooka%NetBSD.org@localhost>
date:      Fri Jan 07 15:47:14 2011 +0000

description:
In case of a P2K_DEBUG mount, dump mount point contents when the
process receives SIGINFO.  Additionally, dump vnode status if the
process gets SIGUSR1 (can be quite quite verbose, therefore not
displayed with SIGINFO).

diffstat:

 lib/libp2k/p2k.c |  37 ++++++++++++++++++++++++++++++++++++-
 1 files changed, 36 insertions(+), 1 deletions(-)

diffs (58 lines):

diff -r d64a7aafe286 -r 58ba03c1b575 lib/libp2k/p2k.c
--- a/lib/libp2k/p2k.c  Fri Jan 07 15:32:11 2011 +0000
+++ b/lib/libp2k/p2k.c  Fri Jan 07 15:47:14 2011 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: p2k.c,v 1.52 2011/01/07 15:30:09 pooka Exp $   */
+/*     $NetBSD: p2k.c,v 1.53 2011/01/07 15:47:14 pooka Exp $   */
 
 /*
  * Copyright (c) 2007, 2008, 2009  Antti Kantee.  All Rights Reserved.
@@ -150,6 +150,29 @@
        rump_pub_allbetsareoff_setid(pid, lid);
 }
 
+static volatile sig_atomic_t dodump;
+static void
+dumpmp(struct puffs_usermount *pu)
+{
+       struct statvfs svfsb;
+
+       if (dodump && p2k_fs_statvfs(pu, &svfsb) == 0) {
+               rump_pub_vfs_mount_print(svfsb.f_mntonname, dodump-1);
+       }
+
+       dodump = 0;
+}
+
+static void
+sighand(int sig)
+{
+
+       if (sig == SIGINFO)
+               dodump = 1;
+       else if (sig == SIGUSR1)
+               dodump = 2;
+}
+
 static __inline struct p2k_vp_hash *
 gethash(struct p2k_mount *p2m, struct vnode *vp)
 {
@@ -444,6 +467,18 @@
        puffs_setstacksize(pu, PUFFS_STACKSIZE_MIN);
        puffs_fakecc = 1;
        puffs_set_prepost(pu, makelwp, NULL);
+
+       if (p2m->p2m_hasdebug) {
+               struct timespec ts;
+
+               signal(SIGINFO, sighand);
+               signal(SIGUSR1, sighand);
+
+               ts.tv_sec = 0;
+               ts.tv_nsec = 1000*1000*10; /* 10ms */
+               puffs_ml_setloopfn(pu, dumpmp);
+               puffs_ml_settimeout(pu, &ts);
+       }
        puffs_set_errnotify(pu, p2k_errcatcher);
 
        puffs_setspecific(pu, p2m);