void
slmbmaptimeothr_begin(struct psc_thread *thr)
{
struct bmap_mds_lease *bml;
int rc, nsecs = 0;
while (pscthr_run(thr)) {
spinlock(&mdsBmapTimeoTbl.btt_lock);
bml = pll_peekhead(&mdsBmapTimeoTbl.btt_leases);
if (!bml) {
freelock(&mdsBmapTimeoTbl.btt_lock);
nsecs = BMAP_TIMEO_MAX;
goto sleep;
}
if (!BML_TRYLOCK(bml)) {
freelock(&mdsBmapTimeoTbl.btt_lock);
nsecs = 1;
goto sleep;
}
if (bml->bml_refcnt) {
BML_ULOCK(bml);
freelock(&mdsBmapTimeoTbl.btt_lock);
nsecs = 1;
goto sleep;
}
if (!(bml->bml_flags & BML_FREEING)) {
nsecs = bml->bml_expire - time(NULL);
if (nsecs > 0) {
BML_ULOCK(bml);
freelock(&mdsBmapTimeoTbl.btt_lock);
goto sleep;
}
bml->bml_flags |= BML_FREEING;
}
BML_ULOCK(bml);
freelock(&mdsBmapTimeoTbl.btt_lock);
rc = mds_bmap_bml_release(bml);
if (rc) {
DEBUG_BMAP(PLL_WARN, bml_2_bmap(bml),
"rc=%d bml=%p fl=%d seq=%"PRId64,
rc, bml, bml->bml_flags, bml->bml_seq);
nsecs = 1;
} else
nsecs = 0;
sleep:
psclog_debug("nsecs=%d", nsecs);
if (nsecs > 0)
sleep((uint32_t)nsecs);
}
}
void
mds_bmap_timeotbl_remove(struct bmap_mds_lease *bml)
{
struct bmap_mds_lease *tmp;
int update = 0;
spinlock(&mdsBmapTimeoTbl.btt_lock);
if (pll_peekhead(&mdsBmapTimeoTbl.btt_leases) == bml)
update = 1;
pll_remove(&mdsBmapTimeoTbl.btt_leases, bml);
if (update) {
tmp = pll_peekhead(&mdsBmapTimeoTbl.btt_leases);
if (tmp)
mdsBmapTimeoTbl.btt_minseq = tmp->bml_seq;
else
mdsBmapTimeoTbl.btt_minseq =
mdsBmapTimeoTbl.btt_maxseq;
mds_bmap_timeotbl_journal_seqno();
}
freelock(&mdsBmapTimeoTbl.btt_lock);
}
void *
_lc_get(struct psc_listcache *plc, const struct timespec *abstime,
int flags)
{
int locked, rc;
void *p;
locked = LIST_CACHE_RLOCK(plc);
// if (plc->plc_flags & PLCF_DYING)
// pfl_assert(flags & PLCF_DYINGOK)
while (lc_empty(plc)) {
if ((plc->plc_flags & PLCF_DYING) ||
(flags & PLCBF_NOBLOCK)) {
LIST_CACHE_URLOCK(plc, locked);
return (NULL);
}
/* Alert listeners who want to know about exhaustion. */
pfl_waitq_wakeall(&plc->plc_wq_want);
if (abstime)
psclog_debug("lc@%p <%s> timed wait "PSCPRI_TIMESPEC,
plc, plc->plc_name, PSCPRI_TIMESPEC_ARGS(abstime));
else
psclog_debug("lc@%p <%s> blocking wait", plc,
plc->plc_name);
if (abstime) {
rc = pfl_waitq_waitabs(&plc->plc_wq_empty,
LIST_CACHE_GETLOCK(plc), abstime);
if (rc) {
pfl_assert(rc == ETIMEDOUT);
errno = rc;
return (NULL);
}
} else
pfl_waitq_wait(&plc->plc_wq_empty,
LIST_CACHE_GETLOCK(plc));
LIST_CACHE_LOCK(plc);
}
if (flags & PLCBF_TAIL)
p = pll_peektail(&plc->plc_pll);
else
p = pll_peekhead(&plc->plc_pll);
if ((flags & PLCBF_PEEK) == 0)
lc_remove(plc, p);
LIST_CACHE_URLOCK(plc, locked);
return (p);
}
