Sergio Lopez b7faf4fdc1 vhost_user_fs: Add the WRITE_KILL_PRIV write flag.
Add the WRITE_KILL_PRIV write flag, corresponding to
FUSE_WRITE_KILL_PRIV introduced in 7.31, and use to only remove the
setuid and setgid bits (by switching credentials) conditionally.

Signed-off-by: Sergio Lopez <slp@redhat.com>
2020-04-17 15:42:40 +01:00
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