CVS commit: src/lib/libperfuse

["Emmanuel Dreyfus" <manu%netbsd.org@localhost>]

Module Name:    src
Committed By:   manu
Date:           Fri Nov 16 02:39:02 UTC 2018

Modified Files:
        src/lib/libperfuse: debug.c ops.c perfuse.c perfuse_priv.h

Log Message:
Use reclaim2 to fix reclaim/lookup race conditions

The PUFFS reclaim operation had a race condition with lookups: we could
be asked to lookup a node, then to reclaim it before lookup completion.
At lookup completion, we would then create a leaked node.

Enter the PUFFS reclaim2 operation, which features a nlookup argument.
That let us count how many lookups are pending and avoid the above
described scenario. It also makes the codes simplier.


To generate a diff of this commit:
cvs rdiff -u -r1.12 -r1.13 src/lib/libperfuse/debug.c
cvs rdiff -u -r1.84 -r1.85 src/lib/libperfuse/ops.c
cvs rdiff -u -r1.40 -r1.41 src/lib/libperfuse/perfuse.c
cvs rdiff -u -r1.36 -r1.37 src/lib/libperfuse/perfuse_priv.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.