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Currently NFSD hard codes checking support for block-style layouts.
Lift the checks into a file system-helper and provide a exportfs-level
helper to implement the typical checks.
This prepares for supporting block layout export of multiple devices
per file system.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Link: https://patch.msgid.link/20260423181854.743150-5-cel@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
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The only thing ->commit_blocks really needs is the new size, with a magic
-1 placeholder 0 for "do not change the size" because it only ever
extends the size.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Link: https://patch.msgid.link/20260423181854.743150-4-cel@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
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The support to grant layouts for direct block device access works
at a very different layer than the rest of exports. Split the methods
for it into a separate struct, and move that into a separate header
to better split things out. The pointer to the new operation vector
is kept in export_operations to avoid bloating the super_block.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Link: https://patch.msgid.link/20260423181854.743150-3-cel@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
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