afs: Locally edit directory data for mkdir/create/unlink/...

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Locally edit the contents of an AFS directory upon a successful inode
operation that modifies that directory (such as mkdir, create and unlink)
so that we can avoid the current practice of re-downloading the directory
after each change.

This is viable provided that the directory version number we get back from
the modifying RPC op is exactly incremented by 1 from what we had
previously.  The data in the directory contents is in a defined format that
we have to parse locally to perform lookups and readdir, so modifying isn't
a problem.

If the edit fails, we just clear the VALID flag on the directory and it
will be reloaded next time it is needed.

Signed-off-by: David Howells <dhowells@redhat.com>

...

This commit is contained in:

David Howells 2018-04-06 14:17:25 +01:00

parent 0031763698

commit 63a4681ff3

8 changed files with 715 additions and 29 deletions

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include/trace/events/afs.h

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