Myklebust, Trond <Trond.Myklebust@xxxxxxxxxx> wrote:
> Hmm... As far as I can see you are still doing an nfs_revalidate_inode()
> in the non-forced case. That will cause expired attributes to be
> retrieved from the server.
Revalidation is only done when you force it or explicitly ask for a basic stat
or the data version number:
- if (need_atime)
- err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
- else
- err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
- if (!err) {
- generic_fillattr(inode, stat);
- stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
+ if (force || stat->request_mask & (XSTAT_BASIC_STATS | XSTAT_VERSION)) {
+ if (force || need_atime)
+ err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
+ else
+ err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
+ if (err)
+ goto out;
Unfortunately, I think I have to revalidate if any of XSTAT_BASIC_STATS are
requested to maintain compatibility with stat() so that stat() can be done
with xstat(). On the other hand, stat() could be done by userspace with
xstat() and AT_FORCE_ATTR_SYNC, I suppose.
David
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