Commit 2b83d3de authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFSv4/pnfs: Ensure we don't miss a file extension 



pNFS writes don't return attributes, however that doesn't mean that we
should ignore the fact that they may be extending the file. This patch
ensures that if a write is seen to extend the file, then we always set
an attribute barrier, and update the cached file size.

Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent 3c38cbe2

fs/nfs/write.c

+9 −6
Original line number Diff line number Diff line
@@ -1378,24 +1378,27 @@ static void nfs_writeback_check_extend(struct nfs_pgio_header *hdr, 
{

	struct nfs_pgio_args *argp = &hdr->args;

	struct nfs_pgio_res *resp = &hdr->res;

	u64 size = argp->offset + resp->count;



	if (!(fattr->valid & NFS_ATTR_FATTR_SIZE))

		fattr->size = size;

	if (nfs_size_to_loff_t(fattr->size) < i_size_read(hdr->inode)) {

		fattr->valid &= ~NFS_ATTR_FATTR_SIZE;

		return;

	if (argp->offset + resp->count != fattr->size)

		return;

	if (nfs_size_to_loff_t(fattr->size) < i_size_read(hdr->inode))

	}

	if (size != fattr->size)

		return;

	/* Set attribute barrier */

	nfs_fattr_set_barrier(fattr);

	/* ...and update size */

	fattr->valid |= NFS_ATTR_FATTR_SIZE;

}



void nfs_writeback_update_inode(struct nfs_pgio_header *hdr)

{

	struct nfs_fattr *fattr = hdr->res.fattr;

	struct nfs_fattr *fattr = &hdr->fattr;

	struct inode *inode = hdr->inode;



	if (fattr == NULL)

		return;

	spin_lock(&inode->i_lock);

	nfs_writeback_check_extend(hdr, fattr);

	nfs_post_op_update_inode_force_wcc_locked(inode, fattr);

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