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A complete label set is a PMEM-label per-dimm per-interleave-set where all the UUIDs match and the interleave set cookie matches the hosting interleave set. Present sysfs attributes for manipulation of a PMEM-namespace's 'alt_name', 'uuid', and 'size' attributes. A later patch will make these settings persistent by writing back the label. Note that PMEM allocations grow forwards from the start of an interleave set (lowest dimm-physical-address (DPA)). BLK-namespaces that alias with a PMEM interleave set will grow allocations backward from the highest DPA. Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Neil Brown <neilb@suse.de> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
74 lines
2.2 KiB
C
74 lines
2.2 KiB
C
/*
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* Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#ifndef __LINUX_ND_H__
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#define __LINUX_ND_H__
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#include <linux/ndctl.h>
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#include <linux/device.h>
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struct nd_device_driver {
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struct device_driver drv;
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unsigned long type;
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int (*probe)(struct device *dev);
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int (*remove)(struct device *dev);
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};
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static inline struct nd_device_driver *to_nd_device_driver(
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struct device_driver *drv)
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{
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return container_of(drv, struct nd_device_driver, drv);
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};
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/**
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* struct nd_namespace_io - infrastructure for loading an nd_pmem instance
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* @dev: namespace device created by the nd region driver
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* @res: struct resource conversion of a NFIT SPA table
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*/
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struct nd_namespace_io {
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struct device dev;
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struct resource res;
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};
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/**
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* struct nd_namespace_pmem - namespace device for dimm-backed interleaved memory
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* @nsio: device and system physical address range to drive
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* @alt_name: namespace name supplied in the dimm label
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* @uuid: namespace name supplied in the dimm label
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*/
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struct nd_namespace_pmem {
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struct nd_namespace_io nsio;
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char *alt_name;
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u8 *uuid;
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};
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static inline struct nd_namespace_io *to_nd_namespace_io(struct device *dev)
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{
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return container_of(dev, struct nd_namespace_io, dev);
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}
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static inline struct nd_namespace_pmem *to_nd_namespace_pmem(struct device *dev)
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{
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struct nd_namespace_io *nsio = to_nd_namespace_io(dev);
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return container_of(nsio, struct nd_namespace_pmem, nsio);
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}
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#define MODULE_ALIAS_ND_DEVICE(type) \
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MODULE_ALIAS("nd:t" __stringify(type) "*")
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#define ND_DEVICE_MODALIAS_FMT "nd:t%d"
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int __must_check __nd_driver_register(struct nd_device_driver *nd_drv,
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struct module *module, const char *mod_name);
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#define nd_driver_register(driver) \
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__nd_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
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#endif /* __LINUX_ND_H__ */
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