nfs_nfsdsocket.c: Allow Copy/Clone from a read-only fs

For some server file system types, such as ZFS, a Copy/Clone
operation can be done across file systems of the same file
system type.

However, without this patch, the Copy/Clone will fail with
EROFS if the input file is on a read-only mounted file system.
This happens because Copy/Clone will try to do a VOP_SETATTR()
of atime to set the atime.

This patch pretends the VOP_SETATTR() of atime worked for
read-only file systems.  It fixes a problem when copying
files from a ZFS snapshot.

PR:	294010

(cherry picked from commit b5815ee99a015c6ac118d7e9646d0c95b72e9f2d)

0 files changed, 0 insertions, 0 deletions