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86ff184279
Recognize the NFSv4.2 per-file UNCACHEABLE_FILE_DATA attribute (attr 87, draft-ietf-nfsv4-uncacheable-files): decode it via GETATTR, track per- exported-filesystem support, and record on the inode whether a regular file's data must not be cached. Acting on the attribute (opening such files O_DIRECT) is done by a subsequent change. If the NFSv4 server reports a regular file's UNCACHEABLE_FILE_DATA as true, it indicates the file's data must not be cached; the client records this in NFS_I(inode)->uncacheable_file_data for use by the I/O paths. The UNCACHEABLE_FILE_DATA attribute applies only to regular files (NF4REG); per the draft a server MUST reject a query of it on any other object type with NFS4ERR_INVAL. A subsequent commit gates the client accordingly. Link: https://datatracker.ietf.org/doc/draft-ietf-nfsv4-uncacheable-files/ Signed-off-by: Tom Haynes <loghyr@hammerspace.com> [snitzer: adapt Tom's original code focused on metadata for ABE] Co-developed-by: Mike Snitzer <snitzer@hammerspace.com> Signed-off-by: Mike Snitzer <snitzer@hammerspace.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org> Assisted-by: Claude:claude-opus-4-8 Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
1987 lines
50 KiB
1987 lines
50 KiB