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Commit 44dd151d authored by Trond Myklebust's avatar Trond Myklebust
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NFS: Don't mark a written page as uptodate until it is on disk 



The write may fail, so we should not mark the page as uptodate until we are
certain that the data has been accepted and written to disk by the server.

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent d9df8d6b

fs/nfs/write.c

+11 −3
Original line number Diff line number Diff line
@@ -191,8 +191,6 @@ static int nfs_writepage_setup(struct nfs_open_context *ctx, struct page *page, 
	}

	/* Update file length */

	nfs_grow_file(page, offset, count);

	/* Set the PG_uptodate flag? */

	nfs_mark_uptodate(page, offset, count);

	nfs_unlock_request(req);

	return 0;

}
@@ -751,7 +749,12 @@ int nfs_updatepage(struct file *file, struct page *page, 
static void nfs_writepage_release(struct nfs_page *req)

{



	if (PageError(req->wb_page) || !nfs_reschedule_unstable_write(req)) {

	if (PageError(req->wb_page)) {

		nfs_end_page_writeback(req->wb_page);

		nfs_inode_remove_request(req);

	} else if (!nfs_reschedule_unstable_write(req)) {

		/* Set the PG_uptodate flag */

		nfs_mark_uptodate(req->wb_page, req->wb_pgbase, req->wb_bytes);

		nfs_end_page_writeback(req->wb_page);

		nfs_inode_remove_request(req);

	} else
@@ -1039,6 +1042,8 @@ static void nfs_writeback_done_full(struct rpc_task *task, void *calldata) 
			dprintk(" marked for commit\n");

			goto next;

		}

		/* Set the PG_uptodate flag? */

		nfs_mark_uptodate(page, req->wb_pgbase, req->wb_bytes);

		dprintk(" OK\n");

remove_request:

		nfs_end_page_writeback(page);
@@ -1249,6 +1254,9 @@ static void nfs_commit_done(struct rpc_task *task, void *calldata) 
		 * returned by the server against all stored verfs. */

		if (!memcmp(req->wb_verf.verifier, data->verf.verifier, sizeof(data->verf.verifier))) {

			/* We have a match */

			/* Set the PG_uptodate flag */

			nfs_mark_uptodate(req->wb_page, req->wb_pgbase,

					req->wb_bytes);

			nfs_inode_remove_request(req);

			dprintk(" OK\n");

			goto next;