Fix per-jail zfs.mount_snapshot setting

When jail.conf set the nopersist flag during startup, it was incorrectly destroying the per-jail ZFS settings. Reported-by: Martin Matuska <[email protected]> Reviewed-by: Ryan Moeller <[email protected]> Signed-off-by: Allan Jude <[email protected]> Sponsored-by: Modirum MDPay Sponsored-by: Klara, Inc. Closes #14509
0mp · Feb 22, 2023 · 1d56c6d · 1d56c6d
1 parent 0f32b1f
commit 1d56c6d
Showing 1 changed file with 14 additions and 2 deletions.
diff --git a/module/os/freebsd/zfs/zfs_vfsops.c b/module/os/freebsd/zfs/zfs_vfsops.c
@@ -2495,7 +2495,9 @@ zfs_jailparam_set(void *obj, void *data)
 		mount_snapshot = -1;
 	else
 		jsys = JAIL_SYS_NEW;
-	if (jsys == JAIL_SYS_NEW) {
+	switch (jsys) {
+	case JAIL_SYS_NEW:
+	{
 		/* "zfs=new" or "zfs.*": the prison gets its own ZFS info. */
 		struct zfs_jailparam *zjp;
 
@@ -2513,12 +2515,22 @@ zfs_jailparam_set(void *obj, void *data)
 		if (mount_snapshot != -1)
 			zjp->mount_snapshot = mount_snapshot;
 		mtx_unlock(&pr->pr_mtx);
-	} else {
+		break;
+	}
+	case JAIL_SYS_INHERIT:
 		/* "zfs=inherit": inherit the parent's ZFS info. */
 		mtx_lock(&pr->pr_mtx);
 		osd_jail_del(pr, zfs_jailparam_slot);
 		mtx_unlock(&pr->pr_mtx);
+		break;
+	case -1:
+		/*
+		 * If the setting being changed is not ZFS related
+		 * then do nothing.
+		 */
+		break;
 	}
+
 	return (0);
 }