int
sl_fcmh_checkacls(struct fidc_membh *f, struct pscfs_req *pfr,
const struct pscfs_creds *pcrp, int accmode)
{
int locked, rv;
acl_t a;
a = slc_acl_get_fcmh(pfr, pcrp, f);
if (a == NULL) {
int rc;
#ifdef SLOPT_POSIX_ACLS_REVERT
locked = FCMH_RLOCK(f);
rc = checkcreds(&f->fcmh_sstb, pcrp, accmode);
FCMH_URLOCK(f, locked);
#else
rc = EACCES;
#endif
return (rc);
}
locked = FCMH_RLOCK(f);
rv = sl_checkacls(a, &f->fcmh_sstb, pcrp, accmode);
FCMH_URLOCK(f, locked);
acl_free(a);
return (rv);
}
int
mdsio_fcmh_refreshattr(struct fidc_membh *f, struct srt_stat *out_sstb)
{
int locked, rc, vfsid;
pthread_t pthr;
pthr = pthread_self();
locked = FCMH_RLOCK(f);
fcmh_wait_locked(f, (f->fcmh_flags & FCMH_BUSY) &&
f->fcmh_owner != pthr);
rc = slfid_to_vfsid(fcmh_2_fid(f), &vfsid);
psc_assert(rc == 0);
rc = mdsio_getattr(vfsid, fcmh_2_mfid(f),
fcmh_2_mfh(f), &rootcreds, &f->fcmh_sstb);
if (out_sstb)
*out_sstb = f->fcmh_sstb;
FCMH_URLOCK(f, locked);
return (rc);
}
/*
* If the generation number changes, we assume a full truncation has
* happened. We need to open a new backing file and attach it to the
* fcmh.
*/
int
sli_fcmh_reopen(struct fidc_membh *f, slfgen_t fgen)
{
int rc = 0;
FCMH_LOCK_ENSURE(f);
OPSTAT_INCR("reopen");
if (fgen == FGEN_ANY) {
OPSTAT_INCR("generation-bogus");
return (EBADF);
}
if (fgen < fcmh_2_gen(f)) {
OPSTAT_INCR("generation-stale");
return (ESTALE);
}
/*
* If our generation number is still unknown try to set it here.
*/
if (fcmh_2_gen(f) == FGEN_ANY && fgen != FGEN_ANY) {
OPSTAT_INCR("generation-fix");
fcmh_2_gen(f) = fgen;
}
if (fgen > fcmh_2_gen(f)) {
struct sl_fidgen oldfg;
char fidfn[PATH_MAX];
DEBUG_FCMH(PLL_DIAG, f, "reopening new backing file");
OPSTAT_INCR("slvr-remove-reopen");
slvr_remove_all(f);
/*
* It's possible the pruning of all slivers and bmaps
* ended up fcmh_op_done() our fcmh so ensure it is
* locked upon finishing.
*/
FCMH_RLOCK(f);
/*
* Need to reopen the backing file and possibly remove
* the old one.
*/
if (f->fcmh_flags & FCMH_IOD_BACKFILE) {
if (close(fcmh_2_fd(f)) == -1) {
OPSTAT_INCR("close-fail");
DEBUG_FCMH(PLL_ERROR, f,
"reopen/close errno=%d", errno);
} else {
OPSTAT_INCR("close-succeed");
}
fcmh_2_fd(f) = -1;
psc_rlim_adj(RLIMIT_NOFILE, -1);
f->fcmh_flags &= ~FCMH_IOD_BACKFILE;
}
oldfg.fg_fid = fcmh_2_fid(f);
oldfg.fg_gen = fcmh_2_gen(f);
fcmh_2_gen(f) = fgen;
rc = sli_open_backing_file(f);
/* Notify upper layers that open() has failed. */
if (!rc)
f->fcmh_flags |= FCMH_IOD_BACKFILE;
/* Do some upfront garbage collection. */
sli_fg_makepath(&oldfg, fidfn);
errno = 0;
unlink(fidfn);
DEBUG_FCMH(PLL_INFO, f, "upfront unlink(), errno=%d",
errno);
} else if (!(f->fcmh_flags & FCMH_IOD_BACKFILE)) {
rc = sli_open_backing_file(f);
if (!rc)
f->fcmh_flags |= FCMH_IOD_BACKFILE;
OPSTAT_INCR("generation-same");
}
return (rc);
}
