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| author | Dan Williams <dan.j.williams@intel.com> | 2017-06-06 11:39:30 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-06-15 14:31:40 -0700 |
| commit | 8f2bc2430e4ec53ea961997d760c3b35f729e444 (patch) | |
| tree | b22d8530aca1b1c470c34f6ae46110f030bc4198 /drivers/nvdimm | |
| parent | faec6f8a1cd2c44e439de35ab3328c5cf7bf52d8 (diff) | |
| download | linux-0-day-8f2bc2430e4ec53ea961997d760c3b35f729e444.tar.gz linux-0-day-8f2bc2430e4ec53ea961997d760c3b35f729e444.tar.xz | |
libnvdimm, label: populate 'isetcookie' for blk-aperture namespaces
Starting with the v1.2 definition of namespace labels, the isetcookie
field is populated and validated for blk-aperture namespaces. This adds
some safety against inadvertent copying of namespace labels from one
DIMM-device to another.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm')
| -rw-r--r-- | drivers/nvdimm/label.c | 12 | ||||
| -rw-r--r-- | drivers/nvdimm/namespace_devs.c | 20 |
2 files changed, 25 insertions, 7 deletions
diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c index d8b87d3a0ebe1..ba0582fb0e213 100644 --- a/drivers/nvdimm/label.c +++ b/drivers/nvdimm/label.c @@ -787,7 +787,17 @@ static int __blk_label_update(struct nd_region *nd_region, nd_label->flags = __cpu_to_le32(NSLABEL_FLAG_LOCAL); nd_label->nlabel = __cpu_to_le16(0); /* N/A */ nd_label->position = __cpu_to_le16(0); /* N/A */ - nd_label->isetcookie = __cpu_to_le64(0); /* N/A */ + + /* + * Use the presence of the type_guid as a flag to + * determine isetcookie usage for blk-aperture + * namespaces. + */ + if (namespace_label_has(ndd, type_guid)) + nd_label->isetcookie = __cpu_to_le64(nd_set->cookie2); + else + nd_label->isetcookie = __cpu_to_le64(0); /* N/A */ + nd_label->dpa = __cpu_to_le64(res->start); nd_label->rawsize = __cpu_to_le64(resource_size(res)); nd_label->lbasize = __cpu_to_le64(nsblk->lbasize); diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index e101aec186c77..7aba9a569c8e5 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -2065,12 +2065,20 @@ struct device *create_namespace_blk(struct nd_region *nd_region, struct device *dev = NULL; struct resource *res; - if (namespace_label_has(ndd, type_guid) - && !guid_equal(&nd_set->type_guid, - &nd_label->type_guid)) { - dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb\n", - nd_set->type_guid.b, nd_label->type_guid.b); - return ERR_PTR(-EAGAIN); + if (namespace_label_has(ndd, type_guid)) { + if (!guid_equal(&nd_set->type_guid, &nd_label->type_guid)) { + dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb\n", + nd_set->type_guid.b, + nd_label->type_guid.b); + return ERR_PTR(-EAGAIN); + } + + if (nd_label->isetcookie != __cpu_to_le64(nd_set->cookie2)) { + dev_dbg(ndd->dev, "expect cookie %#llx got %#llx\n", + nd_set->cookie2, + __le64_to_cpu(nd_label->isetcookie)); + return ERR_PTR(-EAGAIN); + } } nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); |