54 RW_SYSINIT(khelplistlock, &khelp_list_lock, "helper list lock");
56 static TAILQ_HEAD(helper_head, helper) helpers = TAILQ_HEAD_INITIALIZER(helpers);
59 static inline void khelp_remove_osd(struct helper *h, struct osd *hosd);
69 khelp_register_helper(struct helper *h)  in khelp_register_helper()
71 	struct helper *tmph;  in khelp_register_helper()
118 khelp_deregister_helper(struct helper *h)  in khelp_deregister_helper()
120 	struct helper *tmph;  in khelp_deregister_helper()
150 	struct helper *h;  in khelp_init_osd()
160 		/* If helper is correct class and needs to store OSD... */  in khelp_init_osd()
187 	struct helper *h;  in khelp_destroy_osd()
209 khelp_remove_osd(struct helper *h, struct osd *hosd)  in khelp_remove_osd()
215 		 * If the current helper uses OSD and calling osd_get()  in khelp_remove_osd()
216 		 * on the helper's h_id returns non-NULL, the helper has  in khelp_remove_osd()
238 	struct helper *h;  in khelp_get_id()
262 	 * helper's h_hooks struct member.  in khelp_add_hhook()
276 	 * helper's h_hooks struct member.  in khelp_remove_hhook()
290 	struct helper *h;  in khelp_new_hhook_registered()
324 		if (kmd->helper->h_flags & HELPER_NEEDS_OSD) {  in khelp_modevent()
330 			kmd->helper->h_zone = uma_zcreate(kmd->name,  in khelp_modevent()
334 		strlcpy(kmd->helper->h_name, kmd->name, HELPER_NAME_MAXLEN);  in khelp_modevent()
335 		kmd->helper->h_hooks = kmd->hooks;  in khelp_modevent()
336 		kmd->helper->h_nhooks = kmd->nhooks;  in khelp_modevent()
337 		if (kmd->helper->mod_init != NULL)  in khelp_modevent()
338 			error = kmd->helper->mod_init();  in khelp_modevent()
340 			error = khelp_register_helper(kmd->helper);  in khelp_modevent()
346 		error = khelp_deregister_helper(kmd->helper);  in khelp_modevent()
348 			if (kmd->helper->h_flags & HELPER_NEEDS_OSD)  in khelp_modevent()
349 				uma_zdestroy(kmd->helper->h_zone);  in khelp_modevent()
350 			if (kmd->helper->mod_destroy != NULL)  in khelp_modevent()
351 				kmd->helper->mod_destroy();  in khelp_modevent()
353 			/* Do nothing and allow unload if helper not in list. */  in khelp_modevent()
358 			    kmd->helper->h_refcount);  in khelp_modevent()