CVS commit: src/sys/fs/puffs

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

Module Name:    src
Committed By:   manu
Date:           Tue Nov  4 09:14:42 UTC 2014

Modified Files:
        src/sys/fs/puffs: puffs_vnops.c

Log Message:
PUFFS direct I/O cache fix

There are a few situations where we must take care of the cache if direct
I/O was enabled:
- if we do direct I/O for write but not for read, then any write must
  invalidate the cache so that a reader gets the written data and not
  the not-updated cache.
- if we used a vnode without direct I/O and it is enabled for writing,
  we must flush the cache before compeling the open operation, so that
  the cachec write are not lost.

And at inactive time, we wipe direct I/O flags so that a new open without
direct I/O does not inherit direct I/O.


To generate a diff of this commit:
cvs rdiff -u -r1.197 -r1.198 src/sys/fs/puffs/puffs_vnops.c

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