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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 /drivers/nvdimm/core.c | |
| parent | bf9bccc14c05dae8caba29df6187c731710f5380 (diff) | |
| download | linux-1b40e09a1232de537b193fa1b6b3ef16d3a1e397.tar.bz2 | |
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 'drivers/nvdimm/core.c')
| -rw-r--r-- | drivers/nvdimm/core.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/nvdimm/core.c b/drivers/nvdimm/core.c index cf99cce8ef33..dd824d7c2669 100644 --- a/drivers/nvdimm/core.c +++ b/drivers/nvdimm/core.c @@ -173,6 +173,46 @@ int nd_uuid_store(struct device *dev, u8 **uuid_out, const char *buf, return 0; } +ssize_t nd_sector_size_show(unsigned long current_lbasize, + const unsigned long *supported, char *buf) +{ + ssize_t len = 0; + int i; + + for (i = 0; supported[i]; i++) + if (current_lbasize == supported[i]) + len += sprintf(buf + len, "[%ld] ", supported[i]); + else + len += sprintf(buf + len, "%ld ", supported[i]); + len += sprintf(buf + len, "\n"); + return len; +} + +ssize_t nd_sector_size_store(struct device *dev, const char *buf, + unsigned long *current_lbasize, const unsigned long *supported) +{ + unsigned long lbasize; + int rc, i; + + if (dev->driver) + return -EBUSY; + + rc = kstrtoul(buf, 0, &lbasize); + if (rc) + return rc; + + for (i = 0; supported[i]; i++) + if (lbasize == supported[i]) + break; + + if (supported[i]) { + *current_lbasize = lbasize; + return 0; + } else { + return -EINVAL; + } +} + static ssize_t commands_show(struct device *dev, struct device_attribute *attr, char *buf) { |