chflags: Add a new UF_NOCACHE flagHEADmain

This internet draft (which is close to being an RFC)
specifies a new NFSv4.2 attribute which tells the NFSv4.2
client to not cache file data. (Similar to O_DIRECT, but
triggered by this attribute set on the file on the NFSv4.2
server and not by the application's open(2).)

https://datatracker.ietf.org/doc/draft-ietf-nfsv4-uncacheable-files/

This patch adds a new chflags(1) flag called UF_NOCACHE to
implement this.

Patches for NFS and ZFS will be done separately.

This is a redo of the patch, with a requested name change
and a #ifdef in strtofflags.c so that it doesn't break some
Linux cross build.  The name change was requested by fuz@.

Reviewed by:	kib (earlier version)
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D58181

0 files changed, 0 insertions, 0 deletions