static int
sli_open_backing_file(struct fidc_membh *f)
{
int lvl = PLL_DIAG, incr, rc = 0;
char fidfn[PATH_MAX];
/*
* XXX hit setrlimit: operation not permitted, but no open-fail.
* This per open system call should go! Hit again due to fs.nr_open
* sysctl limit.
*/
incr = psc_rlim_adj(RLIMIT_NOFILE, 1);
sli_fg_makepath(&f->fcmh_fg, fidfn);
fcmh_2_fd(f) = open(fidfn, O_CREAT|O_RDWR, 0600);
if (fcmh_2_fd(f) == -1) {
rc = errno;
if (incr)
psc_rlim_adj(RLIMIT_NOFILE, -1);
OPSTAT_INCR("open-fail");
lvl = PLL_WARN;
} else
OPSTAT_INCR("open-succeed");
psclog(lvl, "opened backing file path=%s fd=%d rc=%d",
strstr(fidfn, SL_RPATH_FIDNS_DIR), fcmh_2_fd(f), rc);
return (rc);
}
static int
sli_open_backing_file(struct fidc_membh *f)
{
int lvl = PLL_DIAG, incr, rc = 0;
char fidfn[PATH_MAX];
incr = psc_rlim_adj(RLIMIT_NOFILE, 1);
sli_fg_makepath(&f->fcmh_fg, fidfn);
fcmh_2_fd(f) = open(fidfn, O_CREAT|O_RDWR, 0600);
if (fcmh_2_fd(f) == -1) {
rc = errno;
if (incr)
psc_rlim_adj(RLIMIT_NOFILE, -1);
OPSTAT_INCR("open-fail");
lvl = PLL_WARN;
} else
OPSTAT_INCR("open-succeed");
psclog(lvl, "opened backing file path=%s fd=%d rc=%d",
strstr(fidfn, SL_RPATH_FIDNS_DIR), fcmh_2_fd(f), rc);
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);
}
