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| author |   Dan Williams <dan.j.williams@intel.com> | 2015-05-01 13:34:01 -0400 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2015-06-24 21:24:10 -0400 |
| commit | 1b40e09a1232de537b193fa1b6b3ef16d3a1e397 (patch) | |
| tree | 48111c53fa3125b7d1f46d0f01b9448acbee62d0 /include/linux/nd.h | |
| parent | libnvdimm: pmem label sets and namespace instantiation. (diff) | |
| download | wireguard-linux-1b40e09a1232de537b193fa1b6b3ef16d3a1e397.tar.xz wireguard-linux-1b40e09a1232de537b193fa1b6b3ef16d3a1e397.zip | |
libnvdimm: blk labels and namespace instantiation
A blk label set describes a namespace comprised of one or more
discontiguous dpa ranges on a single dimm. They may alias with one or
more pmem interleave sets that include the given dimm.
This is the runtime/volatile configuration infrastructure for sysfs
manipulation of 'alt_name', 'uuid', 'size', and 'sector_size'. A later
patch will make these settings persistent by writing back the label(s).
Unlike pmem namespaces, multiple blk namespaces can be created per
region. Once a blk namespace has been created a new seed device
(unconfigured child of a parent blk region) is instantiated. As long as
a region has 'available_size' != 0 new child namespaces may be created.
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>
Diffstat (limited to 'include/linux/nd.h')
| -rw-r--r-- | include/linux/nd.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/linux/nd.h b/include/linux/nd.h index 255c38a83083..23276ea91690 100644 --- a/include/linux/nd.h +++ b/include/linux/nd.h @@ -50,6 +50,26 @@ struct nd_namespace_pmem { u8 *uuid; }; +/** + * struct nd_namespace_blk - namespace for dimm-bounded persistent memory + * @dev: namespace device creation by the nd region driver + * @alt_name: namespace name supplied in the dimm label + * @uuid: namespace name supplied in the dimm label + * @id: ida allocated id + * @lbasize: blk namespaces have a native sector size when btt not present + * @num_resources: number of dpa extents to claim + * @res: discontiguous dpa extents for given dimm + */ +struct nd_namespace_blk { + struct device dev; + char *alt_name; + u8 *uuid; + int id; + unsigned long lbasize; + int num_resources; + struct resource **res; +}; + static inline struct nd_namespace_io *to_nd_namespace_io(struct device *dev) { return container_of(dev, struct nd_namespace_io, dev); @@ -62,6 +82,11 @@ static inline struct nd_namespace_pmem *to_nd_namespace_pmem(struct device *dev) return container_of(nsio, struct nd_namespace_pmem, nsio); } +static inline struct nd_namespace_blk *to_nd_namespace_blk(struct device *dev) +{ + return container_of(dev, struct nd_namespace_blk, dev); +} + #define MODULE_ALIAS_ND_DEVICE(type) \ MODULE_ALIAS("nd:t" __stringify(type) "*") #define ND_DEVICE_MODALIAS_FMT "nd:t%d" |