| Current Path : /sys/cddl/dev/dtrace/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/cddl/dev/dtrace/dtrace_ioctl.c |
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
* $FreeBSD: release/9.1.0/sys/cddl/dev/dtrace/dtrace_ioctl.c 211608 2010-08-22 10:53:32Z rpaulo $
*
*/
static int dtrace_verbose_ioctl;
SYSCTL_INT(_debug_dtrace, OID_AUTO, verbose_ioctl, CTLFLAG_RW, &dtrace_verbose_ioctl, 0, "");
#define DTRACE_IOCTL_PRINTF(fmt, ...) if (dtrace_verbose_ioctl) printf(fmt, ## __VA_ARGS__ )
static int
dtrace_ioctl_helper(struct cdev *dev, u_long cmd, caddr_t addr, int flags,
struct thread *td)
{
int rval;
dof_helper_t *dhp = NULL;
dof_hdr_t *dof = NULL;
switch (cmd) {
case DTRACEHIOC_ADDDOF:
dhp = (dof_helper_t *)addr;
/* XXX all because dofhp_dof is 64 bit */
#ifdef __i386
addr = (caddr_t)(uint32_t)dhp->dofhp_dof;
#else
addr = (caddr_t)dhp->dofhp_dof;
#endif
/* FALLTHROUGH */
case DTRACEHIOC_ADD:
dof = dtrace_dof_copyin((intptr_t)addr, &rval);
if (dof == NULL)
return (rval);
mutex_enter(&dtrace_lock);
if ((rval = dtrace_helper_slurp((dof_hdr_t *)dof, dhp)) != -1) {
if (dhp) {
dhp->gen = rval;
copyout(dhp, addr, sizeof(*dhp));
}
rval = 0;
} else {
rval = EINVAL;
}
mutex_exit(&dtrace_lock);
return (rval);
case DTRACEHIOC_REMOVE:
mutex_enter(&dtrace_lock);
rval = dtrace_helper_destroygen((int)*addr);
mutex_exit(&dtrace_lock);
return (rval);
default:
break;
}
return (ENOTTY);
}
/* ARGSUSED */
static int
dtrace_ioctl(struct cdev *dev, u_long cmd, caddr_t addr,
int flags __unused, struct thread *td)
{
#if __FreeBSD_version < 800039
dtrace_state_t *state = dev->si_drv1;
#else
dtrace_state_t *state;
devfs_get_cdevpriv((void **) &state);
#endif
int error = 0;
if (state == NULL)
return (EINVAL);
if (state->dts_anon) {
ASSERT(dtrace_anon.dta_state == NULL);
state = state->dts_anon;
}
switch (cmd) {
case DTRACEIOC_AGGDESC: {
dtrace_aggdesc_t **paggdesc = (dtrace_aggdesc_t **) addr;
dtrace_aggdesc_t aggdesc;
dtrace_action_t *act;
dtrace_aggregation_t *agg;
int nrecs;
uint32_t offs;
dtrace_recdesc_t *lrec;
void *buf;
size_t size;
uintptr_t dest;
DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_AGGDESC\n",__func__,__LINE__);
if (copyin((void *) *paggdesc, &aggdesc, sizeof (aggdesc)) != 0)
return (EFAULT);
mutex_enter(&dtrace_lock);
if ((agg = dtrace_aggid2agg(state, aggdesc.dtagd_id)) == NULL) {
mutex_exit(&dtrace_lock);
return (EINVAL);
}
aggdesc.dtagd_epid = agg->dtag_ecb->dte_epid;
nrecs = aggdesc.dtagd_nrecs;
aggdesc.dtagd_nrecs = 0;
offs = agg->dtag_base;
lrec = &agg->dtag_action.dta_rec;
aggdesc.dtagd_size = lrec->dtrd_offset + lrec->dtrd_size - offs;
for (act = agg->dtag_first; ; act = act->dta_next) {
ASSERT(act->dta_intuple ||
DTRACEACT_ISAGG(act->dta_kind));
/*
* If this action has a record size of zero, it
* denotes an argument to the aggregating action.
* Because the presence of this record doesn't (or
* shouldn't) affect the way the data is interpreted,
* we don't copy it out to save user-level the
* confusion of dealing with a zero-length record.
*/
if (act->dta_rec.dtrd_size == 0) {
ASSERT(agg->dtag_hasarg);
continue;
}
aggdesc.dtagd_nrecs++;
if (act == &agg->dtag_action)
break;
}
/*
* Now that we have the size, we need to allocate a temporary
* buffer in which to store the complete description. We need
* the temporary buffer to be able to drop dtrace_lock()
* across the copyout(), below.
*/
size = sizeof (dtrace_aggdesc_t) +
(aggdesc.dtagd_nrecs * sizeof (dtrace_recdesc_t));
buf = kmem_alloc(size, KM_SLEEP);
dest = (uintptr_t)buf;
bcopy(&aggdesc, (void *)dest, sizeof (aggdesc));
dest += offsetof(dtrace_aggdesc_t, dtagd_rec[0]);
for (act = agg->dtag_first; ; act = act->dta_next) {
dtrace_recdesc_t rec = act->dta_rec;
/*
* See the comment in the above loop for why we pass
* over zero-length records.
*/
if (rec.dtrd_size == 0) {
ASSERT(agg->dtag_hasarg);
continue;
}
if (nrecs-- == 0)
break;
rec.dtrd_offset -= offs;
bcopy(&rec, (void *)dest, sizeof (rec));
dest += sizeof (dtrace_recdesc_t);
if (act == &agg->dtag_action)
break;
}
mutex_exit(&dtrace_lock);
if (copyout(buf, (void *) *paggdesc, dest - (uintptr_t)buf) != 0) {
kmem_free(buf, size);
return (EFAULT);
}
kmem_free(buf, size);
return (0);
}
case DTRACEIOC_AGGSNAP:
case DTRACEIOC_BUFSNAP: {
dtrace_bufdesc_t **pdesc = (dtrace_bufdesc_t **) addr;
dtrace_bufdesc_t desc;
caddr_t cached;
dtrace_buffer_t *buf;
dtrace_debug_output();
if (copyin((void *) *pdesc, &desc, sizeof (desc)) != 0)
return (EFAULT);
DTRACE_IOCTL_PRINTF("%s(%d): %s curcpu %d cpu %d\n",
__func__,__LINE__,
cmd == DTRACEIOC_AGGSNAP ?
"DTRACEIOC_AGGSNAP":"DTRACEIOC_BUFSNAP",
curcpu, desc.dtbd_cpu);
if (desc.dtbd_cpu < 0 || desc.dtbd_cpu >= NCPU)
return (ENOENT);
if (pcpu_find(desc.dtbd_cpu) == NULL)
return (ENOENT);
mutex_enter(&dtrace_lock);
if (cmd == DTRACEIOC_BUFSNAP) {
buf = &state->dts_buffer[desc.dtbd_cpu];
} else {
buf = &state->dts_aggbuffer[desc.dtbd_cpu];
}
if (buf->dtb_flags & (DTRACEBUF_RING | DTRACEBUF_FILL)) {
size_t sz = buf->dtb_offset;
if (state->dts_activity != DTRACE_ACTIVITY_STOPPED) {
mutex_exit(&dtrace_lock);
return (EBUSY);
}
/*
* If this buffer has already been consumed, we're
* going to indicate that there's nothing left here
* to consume.
*/
if (buf->dtb_flags & DTRACEBUF_CONSUMED) {
mutex_exit(&dtrace_lock);
desc.dtbd_size = 0;
desc.dtbd_drops = 0;
desc.dtbd_errors = 0;
desc.dtbd_oldest = 0;
sz = sizeof (desc);
if (copyout(&desc, (void *) *pdesc, sz) != 0)
return (EFAULT);
return (0);
}
/*
* If this is a ring buffer that has wrapped, we want
* to copy the whole thing out.
*/
if (buf->dtb_flags & DTRACEBUF_WRAPPED) {
dtrace_buffer_polish(buf);
sz = buf->dtb_size;
}
if (copyout(buf->dtb_tomax, desc.dtbd_data, sz) != 0) {
mutex_exit(&dtrace_lock);
return (EFAULT);
}
desc.dtbd_size = sz;
desc.dtbd_drops = buf->dtb_drops;
desc.dtbd_errors = buf->dtb_errors;
desc.dtbd_oldest = buf->dtb_xamot_offset;
mutex_exit(&dtrace_lock);
if (copyout(&desc, (void *) *pdesc, sizeof (desc)) != 0)
return (EFAULT);
buf->dtb_flags |= DTRACEBUF_CONSUMED;
return (0);
}
if (buf->dtb_tomax == NULL) {
ASSERT(buf->dtb_xamot == NULL);
mutex_exit(&dtrace_lock);
return (ENOENT);
}
cached = buf->dtb_tomax;
ASSERT(!(buf->dtb_flags & DTRACEBUF_NOSWITCH));
dtrace_xcall(desc.dtbd_cpu,
(dtrace_xcall_t)dtrace_buffer_switch, buf);
state->dts_errors += buf->dtb_xamot_errors;
/*
* If the buffers did not actually switch, then the cross call
* did not take place -- presumably because the given CPU is
* not in the ready set. If this is the case, we'll return
* ENOENT.
*/
if (buf->dtb_tomax == cached) {
ASSERT(buf->dtb_xamot != cached);
mutex_exit(&dtrace_lock);
return (ENOENT);
}
ASSERT(cached == buf->dtb_xamot);
DTRACE_IOCTL_PRINTF("%s(%d): copyout the buffer snapshot\n",__func__,__LINE__);
/*
* We have our snapshot; now copy it out.
*/
if (copyout(buf->dtb_xamot, desc.dtbd_data,
buf->dtb_xamot_offset) != 0) {
mutex_exit(&dtrace_lock);
return (EFAULT);
}
desc.dtbd_size = buf->dtb_xamot_offset;
desc.dtbd_drops = buf->dtb_xamot_drops;
desc.dtbd_errors = buf->dtb_xamot_errors;
desc.dtbd_oldest = 0;
mutex_exit(&dtrace_lock);
DTRACE_IOCTL_PRINTF("%s(%d): copyout buffer desc: size %zd drops %lu errors %lu\n",__func__,__LINE__,(size_t) desc.dtbd_size,(u_long) desc.dtbd_drops,(u_long) desc.dtbd_errors);
/*
* Finally, copy out the buffer description.
*/
if (copyout(&desc, (void *) *pdesc, sizeof (desc)) != 0)
return (EFAULT);
return (0);
}
case DTRACEIOC_CONF: {
dtrace_conf_t conf;
DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_CONF\n",__func__,__LINE__);
bzero(&conf, sizeof (conf));
conf.dtc_difversion = DIF_VERSION;
conf.dtc_difintregs = DIF_DIR_NREGS;
conf.dtc_diftupregs = DIF_DTR_NREGS;
conf.dtc_ctfmodel = CTF_MODEL_NATIVE;
*((dtrace_conf_t *) addr) = conf;
return (0);
}
case DTRACEIOC_DOFGET: {
dof_hdr_t **pdof = (dof_hdr_t **) addr;
dof_hdr_t hdr, *dof = *pdof;
int rval;
uint64_t len;
DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_DOFGET\n",__func__,__LINE__);
if (copyin((void *)dof, &hdr, sizeof (hdr)) != 0)
return (EFAULT);
mutex_enter(&dtrace_lock);
dof = dtrace_dof_create(state);
mutex_exit(&dtrace_lock);
len = MIN(hdr.dofh_loadsz, dof->dofh_loadsz);
rval = copyout(dof, (void *) *pdof, len);
dtrace_dof_destroy(dof);
return (rval == 0 ? 0 : EFAULT);
}
case DTRACEIOC_ENABLE: {
dof_hdr_t *dof = NULL;
dtrace_enabling_t *enab = NULL;
dtrace_vstate_t *vstate;
int err = 0;
int rval;
dtrace_enable_io_t *p = (dtrace_enable_io_t *) addr;
DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_ENABLE\n",__func__,__LINE__);
/*
* If a NULL argument has been passed, we take this as our
* cue to reevaluate our enablings.
*/
if (p->dof == NULL) {
dtrace_enabling_matchall();
return (0);
}
if ((dof = dtrace_dof_copyin((uintptr_t) p->dof, &rval)) == NULL)
return (EINVAL);
mutex_enter(&cpu_lock);
mutex_enter(&dtrace_lock);
vstate = &state->dts_vstate;
if (state->dts_activity != DTRACE_ACTIVITY_INACTIVE) {
mutex_exit(&dtrace_lock);
mutex_exit(&cpu_lock);
dtrace_dof_destroy(dof);
return (EBUSY);
}
if (dtrace_dof_slurp(dof, vstate, td->td_ucred, &enab, 0, B_TRUE) != 0) {
mutex_exit(&dtrace_lock);
mutex_exit(&cpu_lock);
dtrace_dof_destroy(dof);
return (EINVAL);
}
if ((rval = dtrace_dof_options(dof, state)) != 0) {
dtrace_enabling_destroy(enab);
mutex_exit(&dtrace_lock);
mutex_exit(&cpu_lock);
dtrace_dof_destroy(dof);
return (rval);
}
if ((err = dtrace_enabling_match(enab, &p->n_matched)) == 0) {
err = dtrace_enabling_retain(enab);
} else {
dtrace_enabling_destroy(enab);
}
mutex_exit(&cpu_lock);
mutex_exit(&dtrace_lock);
dtrace_dof_destroy(dof);
return (err);
}
case DTRACEIOC_EPROBE: {
dtrace_eprobedesc_t **pepdesc = (dtrace_eprobedesc_t **) addr;
dtrace_eprobedesc_t epdesc;
dtrace_ecb_t *ecb;
dtrace_action_t *act;
void *buf;
size_t size;
uintptr_t dest;
int nrecs;
DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_EPROBE\n",__func__,__LINE__);
if (copyin((void *)*pepdesc, &epdesc, sizeof (epdesc)) != 0)
return (EFAULT);
mutex_enter(&dtrace_lock);
if ((ecb = dtrace_epid2ecb(state, epdesc.dtepd_epid)) == NULL) {
mutex_exit(&dtrace_lock);
return (EINVAL);
}
if (ecb->dte_probe == NULL) {
mutex_exit(&dtrace_lock);
return (EINVAL);
}
epdesc.dtepd_probeid = ecb->dte_probe->dtpr_id;
epdesc.dtepd_uarg = ecb->dte_uarg;
epdesc.dtepd_size = ecb->dte_size;
nrecs = epdesc.dtepd_nrecs;
epdesc.dtepd_nrecs = 0;
for (act = ecb->dte_action; act != NULL; act = act->dta_next) {
if (DTRACEACT_ISAGG(act->dta_kind) || act->dta_intuple)
continue;
epdesc.dtepd_nrecs++;
}
/*
* Now that we have the size, we need to allocate a temporary
* buffer in which to store the complete description. We need
* the temporary buffer to be able to drop dtrace_lock()
* across the copyout(), below.
*/
size = sizeof (dtrace_eprobedesc_t) +
(epdesc.dtepd_nrecs * sizeof (dtrace_recdesc_t));
buf = kmem_alloc(size, KM_SLEEP);
dest = (uintptr_t)buf;
bcopy(&epdesc, (void *)dest, sizeof (epdesc));
dest += offsetof(dtrace_eprobedesc_t, dtepd_rec[0]);
for (act = ecb->dte_action; act != NULL; act = act->dta_next) {
if (DTRACEACT_ISAGG(act->dta_kind) || act->dta_intuple)
continue;
if (nrecs-- == 0)
break;
bcopy(&act->dta_rec, (void *)dest,
sizeof (dtrace_recdesc_t));
dest += sizeof (dtrace_recdesc_t);
}
mutex_exit(&dtrace_lock);
if (copyout(buf, (void *) *pepdesc, dest - (uintptr_t)buf) != 0) {
kmem_free(buf, size);
return (EFAULT);
}
kmem_free(buf, size);
return (0);
}
case DTRACEIOC_FORMAT: {
dtrace_fmtdesc_t *fmt = (dtrace_fmtdesc_t *) addr;
char *str;
int len;
DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_FORMAT\n",__func__,__LINE__);
mutex_enter(&dtrace_lock);
if (fmt->dtfd_format == 0 ||
fmt->dtfd_format > state->dts_nformats) {
mutex_exit(&dtrace_lock);
return (EINVAL);
}
/*
* Format strings are allocated contiguously and they are
* never freed; if a format index is less than the number
* of formats, we can assert that the format map is non-NULL
* and that the format for the specified index is non-NULL.
*/
ASSERT(state->dts_formats != NULL);
str = state->dts_formats[fmt->dtfd_format - 1];
ASSERT(str != NULL);
len = strlen(str) + 1;
if (len > fmt->dtfd_length) {
fmt->dtfd_length = len;
} else {
if (copyout(str, fmt->dtfd_string, len) != 0) {
mutex_exit(&dtrace_lock);
return (EINVAL);
}
}
mutex_exit(&dtrace_lock);
return (0);
}
case DTRACEIOC_GO: {
int rval;
processorid_t *cpuid = (processorid_t *) addr;
DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_GO\n",__func__,__LINE__);
rval = dtrace_state_go(state, cpuid);
return (rval);
}
case DTRACEIOC_PROBEARG: {
dtrace_argdesc_t *desc = (dtrace_argdesc_t *) addr;
dtrace_probe_t *probe;
dtrace_provider_t *prov;
DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_PROBEARG\n",__func__,__LINE__);
if (desc->dtargd_id == DTRACE_IDNONE)
return (EINVAL);
if (desc->dtargd_ndx == DTRACE_ARGNONE)
return (EINVAL);
mutex_enter(&dtrace_provider_lock);
mutex_enter(&mod_lock);
mutex_enter(&dtrace_lock);
if (desc->dtargd_id > dtrace_nprobes) {
mutex_exit(&dtrace_lock);
mutex_exit(&mod_lock);
mutex_exit(&dtrace_provider_lock);
return (EINVAL);
}
if ((probe = dtrace_probes[desc->dtargd_id - 1]) == NULL) {
mutex_exit(&dtrace_lock);
mutex_exit(&mod_lock);
mutex_exit(&dtrace_provider_lock);
return (EINVAL);
}
mutex_exit(&dtrace_lock);
prov = probe->dtpr_provider;
if (prov->dtpv_pops.dtps_getargdesc == NULL) {
/*
* There isn't any typed information for this probe.
* Set the argument number to DTRACE_ARGNONE.
*/
desc->dtargd_ndx = DTRACE_ARGNONE;
} else {
desc->dtargd_native[0] = '\0';
desc->dtargd_xlate[0] = '\0';
desc->dtargd_mapping = desc->dtargd_ndx;
prov->dtpv_pops.dtps_getargdesc(prov->dtpv_arg,
probe->dtpr_id, probe->dtpr_arg, desc);
}
mutex_exit(&mod_lock);
mutex_exit(&dtrace_provider_lock);
return (0);
}
case DTRACEIOC_PROBEMATCH:
case DTRACEIOC_PROBES: {
dtrace_probedesc_t *p_desc = (dtrace_probedesc_t *) addr;
dtrace_probe_t *probe = NULL;
dtrace_probekey_t pkey;
dtrace_id_t i;
int m = 0;
uint32_t priv = 0;
uid_t uid = 0;
zoneid_t zoneid = 0;
DTRACE_IOCTL_PRINTF("%s(%d): %s\n",__func__,__LINE__,
cmd == DTRACEIOC_PROBEMATCH ?
"DTRACEIOC_PROBEMATCH":"DTRACEIOC_PROBES");
p_desc->dtpd_provider[DTRACE_PROVNAMELEN - 1] = '\0';
p_desc->dtpd_mod[DTRACE_MODNAMELEN - 1] = '\0';
p_desc->dtpd_func[DTRACE_FUNCNAMELEN - 1] = '\0';
p_desc->dtpd_name[DTRACE_NAMELEN - 1] = '\0';
/*
* Before we attempt to match this probe, we want to give
* all providers the opportunity to provide it.
*/
if (p_desc->dtpd_id == DTRACE_IDNONE) {
mutex_enter(&dtrace_provider_lock);
dtrace_probe_provide(p_desc, NULL);
mutex_exit(&dtrace_provider_lock);
p_desc->dtpd_id++;
}
if (cmd == DTRACEIOC_PROBEMATCH) {
dtrace_probekey(p_desc, &pkey);
pkey.dtpk_id = DTRACE_IDNONE;
}
dtrace_cred2priv(td->td_ucred, &priv, &uid, &zoneid);
mutex_enter(&dtrace_lock);
if (cmd == DTRACEIOC_PROBEMATCH) {
for (i = p_desc->dtpd_id; i <= dtrace_nprobes; i++) {
if ((probe = dtrace_probes[i - 1]) != NULL &&
(m = dtrace_match_probe(probe, &pkey,
priv, uid, zoneid)) != 0)
break;
}
if (m < 0) {
mutex_exit(&dtrace_lock);
return (EINVAL);
}
} else {
for (i = p_desc->dtpd_id; i <= dtrace_nprobes; i++) {
if ((probe = dtrace_probes[i - 1]) != NULL &&
dtrace_match_priv(probe, priv, uid, zoneid))
break;
}
}
if (probe == NULL) {
mutex_exit(&dtrace_lock);
return (ESRCH);
}
dtrace_probe_description(probe, p_desc);
mutex_exit(&dtrace_lock);
return (0);
}
case DTRACEIOC_PROVIDER: {
dtrace_providerdesc_t *pvd = (dtrace_providerdesc_t *) addr;
dtrace_provider_t *pvp;
DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_PROVIDER\n",__func__,__LINE__);
pvd->dtvd_name[DTRACE_PROVNAMELEN - 1] = '\0';
mutex_enter(&dtrace_provider_lock);
for (pvp = dtrace_provider; pvp != NULL; pvp = pvp->dtpv_next) {
if (strcmp(pvp->dtpv_name, pvd->dtvd_name) == 0)
break;
}
mutex_exit(&dtrace_provider_lock);
if (pvp == NULL)
return (ESRCH);
bcopy(&pvp->dtpv_priv, &pvd->dtvd_priv, sizeof (dtrace_ppriv_t));
bcopy(&pvp->dtpv_attr, &pvd->dtvd_attr, sizeof (dtrace_pattr_t));
return (0);
}
case DTRACEIOC_REPLICATE: {
dtrace_repldesc_t *desc = (dtrace_repldesc_t *) addr;
dtrace_probedesc_t *match = &desc->dtrpd_match;
dtrace_probedesc_t *create = &desc->dtrpd_create;
int err;
DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_REPLICATE\n",__func__,__LINE__);
match->dtpd_provider[DTRACE_PROVNAMELEN - 1] = '\0';
match->dtpd_mod[DTRACE_MODNAMELEN - 1] = '\0';
match->dtpd_func[DTRACE_FUNCNAMELEN - 1] = '\0';
match->dtpd_name[DTRACE_NAMELEN - 1] = '\0';
create->dtpd_provider[DTRACE_PROVNAMELEN - 1] = '\0';
create->dtpd_mod[DTRACE_MODNAMELEN - 1] = '\0';
create->dtpd_func[DTRACE_FUNCNAMELEN - 1] = '\0';
create->dtpd_name[DTRACE_NAMELEN - 1] = '\0';
mutex_enter(&dtrace_lock);
err = dtrace_enabling_replicate(state, match, create);
mutex_exit(&dtrace_lock);
return (err);
}
case DTRACEIOC_STATUS: {
dtrace_status_t *stat = (dtrace_status_t *) addr;
dtrace_dstate_t *dstate;
int i, j;
uint64_t nerrs;
DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_STATUS\n",__func__,__LINE__);
/*
* See the comment in dtrace_state_deadman() for the reason
* for setting dts_laststatus to INT64_MAX before setting
* it to the correct value.
*/
state->dts_laststatus = INT64_MAX;
dtrace_membar_producer();
state->dts_laststatus = dtrace_gethrtime();
bzero(stat, sizeof (*stat));
mutex_enter(&dtrace_lock);
if (state->dts_activity == DTRACE_ACTIVITY_INACTIVE) {
mutex_exit(&dtrace_lock);
return (ENOENT);
}
if (state->dts_activity == DTRACE_ACTIVITY_DRAINING)
stat->dtst_exiting = 1;
nerrs = state->dts_errors;
dstate = &state->dts_vstate.dtvs_dynvars;
for (i = 0; i < NCPU; i++) {
#if !defined(sun)
if (pcpu_find(i) == NULL)
continue;
#endif
dtrace_dstate_percpu_t *dcpu = &dstate->dtds_percpu[i];
stat->dtst_dyndrops += dcpu->dtdsc_drops;
stat->dtst_dyndrops_dirty += dcpu->dtdsc_dirty_drops;
stat->dtst_dyndrops_rinsing += dcpu->dtdsc_rinsing_drops;
if (state->dts_buffer[i].dtb_flags & DTRACEBUF_FULL)
stat->dtst_filled++;
nerrs += state->dts_buffer[i].dtb_errors;
for (j = 0; j < state->dts_nspeculations; j++) {
dtrace_speculation_t *spec;
dtrace_buffer_t *buf;
spec = &state->dts_speculations[j];
buf = &spec->dtsp_buffer[i];
stat->dtst_specdrops += buf->dtb_xamot_drops;
}
}
stat->dtst_specdrops_busy = state->dts_speculations_busy;
stat->dtst_specdrops_unavail = state->dts_speculations_unavail;
stat->dtst_stkstroverflows = state->dts_stkstroverflows;
stat->dtst_dblerrors = state->dts_dblerrors;
stat->dtst_killed =
(state->dts_activity == DTRACE_ACTIVITY_KILLED);
stat->dtst_errors = nerrs;
mutex_exit(&dtrace_lock);
return (0);
}
case DTRACEIOC_STOP: {
int rval;
processorid_t *cpuid = (processorid_t *) addr;
DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_STOP\n",__func__,__LINE__);
mutex_enter(&dtrace_lock);
rval = dtrace_state_stop(state, cpuid);
mutex_exit(&dtrace_lock);
return (rval);
}
default:
error = ENOTTY;
}
return (error);
}