X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=module%2Fzfs%2Fzvol.c;fp=module%2Fzfs%2Fzvol.c;h=125d58de918b750611034a6f9cc4043eca2fa0fa;hb=74497b7ab6af69434453e03c755d3f6e6e655aee;hp=ba26543f783a155e6e5e9564277c6f0c1d5e1fb6;hpb=bc98d6c80944dcd920d1147e6bff2192e886a2f5;p=zfs.git

diff --git a/module/zfs/zvol.c b/module/zfs/zvol.c
index ba26543..125d58d 100644
--- a/module/zfs/zvol.c
+++ b/module/zfs/zvol.c
@@ -46,6 +46,7 @@
 #include <sys/zvol.h>
 #include <linux/blkdev_compat.h>
 
+unsigned int zvol_inhibit_dev = 0;
 unsigned int zvol_major = ZVOL_MAJOR;
 unsigned int zvol_threads = 32;
 
@@ -1341,6 +1342,9 @@ zvol_create_minors(const char *pool)
 	spa_t *spa = NULL;
 	int error = 0;
 
+	if (zvol_inhibit_dev)
+		return (0);
+
 	mutex_enter(&zvol_state_lock);
 	if (pool) {
 		error = dmu_objset_find_spa(NULL, pool, zvol_create_minors_cb,
@@ -1370,6 +1374,9 @@ zvol_remove_minors(const char *pool)
 	zvol_state_t *zv, *zv_next;
 	char *str;
 
+	if (zvol_inhibit_dev)
+		return;
+
 	str = kmem_zalloc(MAXNAMELEN, KM_SLEEP);
 	if (pool) {
 		(void) strncpy(str, pool, strlen(pool));
@@ -1431,6 +1438,9 @@ zvol_fini(void)
 	list_destroy(&zvol_state_list);
 }
 
+module_param(zvol_inhibit_dev, uint, 0644);
+MODULE_PARM_DESC(zvol_inhibit_dev, "Do not create zvol device nodes");
+
 module_param(zvol_major, uint, 0444);
 MODULE_PARM_DESC(zvol_major, "Major number for zvol device");