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29 July 2024, 15:18:00 UTC
Revision cbe7fba8edfc8cb8e621599e376f8ac5c224fa72 authored by Amir Goldstein on 15 November 2019, 11:33:03 UTC, committed by Miklos Szeredi on 10 December 2019, 15:00:55 UTC 
ovl: make sure that real fid is 32bit aligned in memory
 
Seprate on-disk encoding from in-memory and on-wire resresentation
of overlay file handle.

In-memory and on-wire we only ever pass around pointers to struct
ovl_fh, which encapsulates at offset 3 the on-disk format struct
ovl_fb. struct ovl_fb encapsulates at offset 21 the real file handle.
That makes sure that the real file handle is always 32bit aligned
in-memory when passed down to the underlying filesystem.

On-disk format remains the same and store/load are done into
correctly aligned buffer.

New nfs exported file handles are exported with aligned real fid.
Old nfs file handles are copied to an aligned buffer before being
decoded.

Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
1 parent 7e63c87
History
Tip revision: cbe7fba8edfc8cb8e621599e376f8ac5c224fa72 authored by Amir Goldstein on 15 November 2019, 11:33:03 UTC
ovl: make sure that real fid is 32bit aligned in memory
Tip revision: cbe7fba
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