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Commit 62e4a769 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFS: Revert pnfs ugliness from the generic NFS read code path 



pNFS-specific code belongs in the pnfs layer. It should not be
hijacking generic NFS read or write code paths.

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 2aa13531

fs/nfs/internal.h

+2 −0
Original line number Diff line number Diff line
@@ -299,6 +299,8 @@ extern void nfs_read_prepare(struct rpc_task *task, void *calldata); 
extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc,

		struct list_head *head);



extern void nfs_pageio_init_read_mds(struct nfs_pageio_descriptor *pgio,

		struct inode *inode);

extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);

extern void nfs_readdata_release(struct nfs_read_data *rdata);

fs/nfs/pnfs.c

+21 −5
Original line number Diff line number Diff line
@@ -1259,6 +1259,25 @@ pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) 
}

EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages);



static void pnfs_ld_handle_read_error(struct nfs_read_data *data)

{

	struct nfs_pageio_descriptor pgio;



	put_lseg(data->lseg);

	data->lseg = NULL;

	dprintk("pnfs write error = %d\n", data->pnfs_error);



	nfs_pageio_init_read_mds(&pgio, data->inode);



	while (!list_empty(&data->pages)) {

		struct nfs_page *req = nfs_list_entry(data->pages.next);



		nfs_list_remove_request(req);

		nfs_pageio_add_request(&pgio, req);

	}

	nfs_pageio_complete(&pgio);

}



/*

 * Called by non rpc-based layout drivers

 */
@@ -1267,11 +1286,8 @@ void pnfs_ld_read_done(struct nfs_read_data *data) 
	if (likely(!data->pnfs_error)) {

		__nfs4_read_done_cb(data);

		data->mds_ops->rpc_call_done(&data->task, data);

	} else {

		put_lseg(data->lseg);

		data->lseg = NULL;

		dprintk("pnfs write error = %d\n", data->pnfs_error);

	}

	} else

		pnfs_ld_handle_read_error(data);

	data->mds_ops->rpc_release(data);

}

EXPORT_SYMBOL_GPL(pnfs_ld_read_done);

fs/nfs/read.c

+2 −12
Original line number Diff line number Diff line
@@ -109,7 +109,7 @@ static void nfs_readpage_truncate_uninitialised_page(struct nfs_read_data *data) 
	}

}



static void nfs_pageio_init_read_mds(struct nfs_pageio_descriptor *pgio,

void nfs_pageio_init_read_mds(struct nfs_pageio_descriptor *pgio,

		struct inode *inode)

{

	nfs_pageio_init(pgio, inode, &nfs_pageio_read_ops,
@@ -534,23 +534,13 @@ static void nfs_readpage_result_full(struct rpc_task *task, void *calldata) 
static void nfs_readpage_release_full(void *calldata)

{

	struct nfs_read_data *data = calldata;

	struct nfs_pageio_descriptor pgio;



	if (data->pnfs_error) {

		nfs_pageio_init_read_mds(&pgio, data->inode);

		pgio.pg_recoalesce = 1;

	}

	while (!list_empty(&data->pages)) {

		struct nfs_page *req = nfs_list_entry(data->pages.next);



		nfs_list_remove_request(req);

		if (!data->pnfs_error)

		nfs_readpage_release(req);

		else

			nfs_pageio_add_request(&pgio, req);

	}

	if (data->pnfs_error)

		nfs_pageio_complete(&pgio);

	nfs_readdata_release(calldata);

}