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libzfs: make userquota_propname_decode threadsafe 

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Signed-off-by: Richard Kojedzinszky <richard@kojedz.in>
Closes #15793
This commit is contained in:
Richard Kojedzinszky 2024-01-17 20:48:02 +01:00 committed by Brian Behlendorf
parent 0cbf135293
commit 692f0daba3
1 changed files with 10 additions and 2 deletions
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12
lib/libzfs/libzfs_dataset.c
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@ -67,6 +67,10 @@
#include "libzfs_impl.h"
#include "zfs_deleg.h"
static __thread struct passwd gpwd;
static __thread struct group ggrp;
static __thread char rpbuf[2048];
static int userquota_propname_decode(const char *propname, boolean_t zoned,
zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp);
@ -3195,11 +3199,15 @@ userquota_propname_decode(const char *propname, boolean_t zoned,
cp = strchr(propname, '@') + 1;
if (isuser && (pw = getpwnam(cp)) != NULL) {
if (isuser &&
getpwnam_r(cp, &gpwd, rpbuf, sizeof (rpbuf), &pw) == 0 &&
pw != NULL) {
if (zoned && getzoneid() == GLOBAL_ZONEID)
return (ENOENT);
*ridp = pw->pw_uid;
} else if (isgroup && (gr = getgrnam(cp)) != NULL) {
} else if (isgroup &&
getgrnam_r(cp, &ggrp, rpbuf, sizeof (rpbuf), &gr) == 0 &&
gr != NULL) {
if (zoned && getzoneid() == GLOBAL_ZONEID)
return (ENOENT);
*ridp = gr->gr_gid;