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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).
This commit is contained in:
pooka 2011-01-07 15:47:14 +00:00
parent c82905f94c
commit 27daa694a2
1 changed files with 36 additions and 1 deletions
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37
lib/libp2k/p2k.c
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@ -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 @@ makelwp(struct puffs_usermount *pu)
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 @@ setupfs(struct p2k_mount *p2m, const char *vfsname, const char *devpath,
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);