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| author | Jane Chu <jane.chu@oracle.com> | 2022-05-13 15:10:58 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2022-05-16 13:35:56 -0700 |
| commit | e511c4a3d2a1f64aafc1f5df37a2ffcf7ef91b55 (patch) | |
| tree | eccb155ac340c8bd514ab14af30edfc48208b3bd /drivers/dax | |
| parent | 5898b43af954b83c4a4ee4ab85c4dbafa395822a (diff) | |
| download | linux-stable-e511c4a3d2a1f64aafc1f5df37a2ffcf7ef91b55.tar.gz linux-stable-e511c4a3d2a1f64aafc1f5df37a2ffcf7ef91b55.tar.bz2 linux-stable-e511c4a3d2a1f64aafc1f5df37a2ffcf7ef91b55.zip | |
dax: introduce DAX_RECOVERY_WRITE dax access mode
Up till now, dax_direct_access() is used implicitly for normal
access, but for the purpose of recovery write, dax range with
poison is requested. To make the interface clear, introduce
enum dax_access_mode {
DAX_ACCESS,
DAX_RECOVERY_WRITE,
}
where DAX_ACCESS is used for normal dax access, and
DAX_RECOVERY_WRITE is used for dax recovery write.
Suggested-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jane Chu <jane.chu@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Mike Snitzer <snitzer@redhat.com>
Reviewed-by: Vivek Goyal <vgoyal@redhat.com>
Link: https://lore.kernel.org/r/165247982851.52965.11024212198889762949.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dax')
| -rw-r--r-- | drivers/dax/super.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/dax/super.c b/drivers/dax/super.c index 0211e6f7b47a..5405eb553430 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -117,6 +117,7 @@ enum dax_device_flags { * @dax_dev: a dax_device instance representing the logical memory range * @pgoff: offset in pages from the start of the device to translate * @nr_pages: number of consecutive pages caller can handle relative to @pfn + * @mode: indicator on normal access or recovery write * @kaddr: output parameter that returns a virtual address mapping of pfn * @pfn: output parameter that returns an absolute pfn translation of @pgoff * @@ -124,7 +125,7 @@ enum dax_device_flags { * pages accessible at the device relative @pgoff. */ long dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, long nr_pages, - void **kaddr, pfn_t *pfn) + enum dax_access_mode mode, void **kaddr, pfn_t *pfn) { long avail; @@ -138,7 +139,7 @@ long dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, long nr_pages, return -EINVAL; avail = dax_dev->ops->direct_access(dax_dev, pgoff, nr_pages, - kaddr, pfn); + mode, kaddr, pfn); if (!avail) return -ERANGE; return min(avail, nr_pages); |