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Commit f5062003 authored by Trond Myklebust's avatar Trond Myklebust
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NFS: Set an attribute barrier on all updates 



Ensure that we update the attribute barrier even if there were no
invalidations, provided that this value is newer than the old one.

Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
Tested-by: default avatarChuck Lever <chuck.lever@oracle.com>
parent f044636d

fs/nfs/inode.c

+4 −0
Original line number Diff line number Diff line
@@ -1738,6 +1738,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) 
		nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);

		nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);

		nfsi->attrtimeo_timestamp = now;

		/* Set barrier to be more recent than all outstanding updates */

		nfsi->attr_gencount = nfs_inc_attr_generation_counter();

	} else {

		if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
@@ -1745,6 +1746,9 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) 
				nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);

			nfsi->attrtimeo_timestamp = now;

		}

		/* Set the barrier to be more recent than this fattr */

		if ((long)fattr->gencount - (long)nfsi->attr_gencount > 0)

			nfsi->attr_gencount = fattr->gencount;

	}

	invalid &= ~NFS_INO_INVALID_ATTR;

	/* Don't invalidate the data if we were to blame */