ovl: return required buffer size for file handles

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Overlayfs doesn't work well with the fanotify mechanism.

Fanotify first probes for the required buffer size for the file handle,
but overlayfs currently bails out without passing the size back.

That results in errors in the kernel log, such as:

[527944.485384] overlayfs: failed to encode file handle (/, err=-75, buflen=0, len=29, type=1)
[527944.485386] fanotify: failed to encode fid (fsid=ae521e68.a434d95f, type=255, bytes=0, err=-2)

Signed-off-by: Lubos Dolezel <lubos@dolezel.info>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

...

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Lubos Dolezel 2020-05-04 21:35:09 +02:00 • committed by Miklos Szeredi

parent 399c109d35

commit 144da23bea

1 changed files with 8 additions and 10 deletions

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18

fs/overlayfs/export.c

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