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| author | Pankaj Gupta <pagupta@redhat.com> | 2019-07-05 19:33:22 +0530 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2019-07-05 15:19:10 -0700 |
| commit | c5d4355d10d414a96ca870b731756b89d068d57a (patch) | |
| tree | 9796dcbf336da17f018db742bd0f7e33ada85b2c /include/linux/libnvdimm.h | |
| parent | db5d00c93edc0afba1027e51ff3b38dc0e5f7728 (diff) | |
| download | lwn-c5d4355d10d414a96ca870b731756b89d068d57a.tar.gz lwn-c5d4355d10d414a96ca870b731756b89d068d57a.zip | |
libnvdimm: nd_region flush callback support
This patch adds functionality to perform flush from guest
to host over VIRTIO. We are registering a callback based
on 'nd_region' type. virtio_pmem driver requires this special
flush function. For rest of the region types we are registering
existing flush function. Report error returned by host fsync
failure to userspace.
Signed-off-by: Pankaj Gupta <pagupta@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include/linux/libnvdimm.h')
| -rw-r--r-- | include/linux/libnvdimm.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h index 03d5c3aece9d..e13100f424c8 100644 --- a/include/linux/libnvdimm.h +++ b/include/linux/libnvdimm.h @@ -11,6 +11,7 @@ #include <linux/types.h> #include <linux/uuid.h> #include <linux/spinlock.h> +#include <linux/bio.h> struct badrange_entry { u64 start; @@ -57,6 +58,9 @@ enum { */ ND_REGION_PERSIST_MEMCTRL = 2, + /* Platform provides asynchronous flush mechanism */ + ND_REGION_ASYNC = 3, + /* mark newly adjusted resources as requiring a label update */ DPA_RESOURCE_ADJUSTED = 1 << 0, }; @@ -113,6 +117,7 @@ struct nd_mapping_desc { int position; }; +struct nd_region; struct nd_region_desc { struct resource *res; struct nd_mapping_desc *mapping; @@ -125,6 +130,7 @@ struct nd_region_desc { int target_node; unsigned long flags; struct device_node *of_node; + int (*flush)(struct nd_region *nd_region, struct bio *bio); }; struct device; @@ -252,7 +258,8 @@ unsigned long nd_blk_memremap_flags(struct nd_blk_region *ndbr); unsigned int nd_region_acquire_lane(struct nd_region *nd_region); void nd_region_release_lane(struct nd_region *nd_region, unsigned int lane); u64 nd_fletcher64(void *addr, size_t len, bool le); -void nvdimm_flush(struct nd_region *nd_region); +int nvdimm_flush(struct nd_region *nd_region, struct bio *bio); +int generic_nvdimm_flush(struct nd_region *nd_region); int nvdimm_has_flush(struct nd_region *nd_region); int nvdimm_has_cache(struct nd_region *nd_region); int nvdimm_in_overwrite(struct nvdimm *nvdimm); |