From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- drivers/md/dm-hw-handler.h | 61 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 drivers/md/dm-hw-handler.h (limited to 'drivers/md/dm-hw-handler.h') diff --git a/drivers/md/dm-hw-handler.h b/drivers/md/dm-hw-handler.h new file mode 100644 index 00000000000..15f5629e231 --- /dev/null +++ b/drivers/md/dm-hw-handler.h @@ -0,0 +1,61 @@ +/* + * Copyright (C) 2004 Red Hat, Inc. All rights reserved. + * + * This file is released under the GPL. + * + * Multipath hardware handler registration. + */ + +#ifndef DM_HW_HANDLER_H +#define DM_HW_HANDLER_H + +#include + +#include "dm-mpath.h" + +struct hw_handler_type; +struct hw_handler { + struct hw_handler_type *type; + void *context; +}; + +/* + * Constructs a hardware handler object, takes custom arguments + */ +/* Information about a hardware handler type */ +struct hw_handler_type { + char *name; + struct module *module; + + int (*create) (struct hw_handler *handler, unsigned int argc, + char **argv); + void (*destroy) (struct hw_handler *hwh); + + void (*pg_init) (struct hw_handler *hwh, unsigned bypassed, + struct path *path); + unsigned (*error) (struct hw_handler *hwh, struct bio *bio); + int (*status) (struct hw_handler *hwh, status_type_t type, + char *result, unsigned int maxlen); +}; + +/* Register a hardware handler */ +int dm_register_hw_handler(struct hw_handler_type *type); + +/* Unregister a hardware handler */ +int dm_unregister_hw_handler(struct hw_handler_type *type); + +/* Returns a registered hardware handler type */ +struct hw_handler_type *dm_get_hw_handler(const char *name); + +/* Releases a hardware handler */ +void dm_put_hw_handler(struct hw_handler_type *hwht); + +/* Default err function */ +unsigned dm_scsi_err_handler(struct hw_handler *hwh, struct bio *bio); + +/* Error flags for err and dm_pg_init_complete */ +#define MP_FAIL_PATH 1 +#define MP_BYPASS_PG 2 +#define MP_ERROR_IO 4 /* Don't retry this I/O */ + +#endif -- cgit v1.2.3