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authorDan Williams <dan.j.williams@intel.com>2017-04-19 15:14:31 -0700
committerDan Williams <dan.j.williams@intel.com>2017-04-19 15:14:31 -0700
commit72058005411ffddcae6c06f7b691d635489132af (patch)
treea92ff7c7c6c968e2c7fc17a0b0e85b5fc3514af5 /include/linux/dax.h
parent7b6be8444e0f0dd675b54d059793423d3c9b4c03 (diff)
dax: add a facility to lookup a dax device by 'host' device name
For the current block_device based filesystem-dax path, we need a way for it to lookup the dax_device associated with a block_device. Add a 'host' property of a dax_device that can be used for this purpose. It is a free form string, but for a dax_device associated with a block device it is the bdev name. This is a stop-gap until filesystems are able to mount on a dax-inode directly. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include/linux/dax.h')
-rw-r--r--include/linux/dax.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/dax.h b/include/linux/dax.h
index 5b62f5d19aea..9b2d5ba10d7d 100644
--- a/include/linux/dax.h
+++ b/include/linux/dax.h
@@ -10,6 +10,7 @@ struct iomap_ops;
int dax_read_lock(void);
void dax_read_unlock(int id);
+struct dax_device *dax_get_by_host(const char *host);
/*
* We use lowest available bit in exceptional entry for locking, one bit for