Commit c3766276 authored by Anna Schumaker's avatar Anna Schumaker Committed by Trond Myklebust
Browse files

NFS: Create a common multiple_pgios() function 



Once again, these two functions look identical in the read and write
case.  Time to combine them together!

Signed-off-by: default avatarAnna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent 1ed26f33

fs/nfs/internal.h

+1 −0
Original line number Diff line number Diff line
@@ -243,6 +243,7 @@ void nfs_pgio_data_release(struct nfs_pgio_data *); 
int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *);

int nfs_initiate_pgio(struct rpc_clnt *, struct nfs_pgio_data *,

		      const struct rpc_call_ops *, int, int);

int nfs_do_multiple_pgios(struct list_head *, const struct rpc_call_ops *, int);



static inline void nfs_iocounter_init(struct nfs_io_counter *c)

{

fs/nfs/pagelist.c

+21 −0
Original line number Diff line number Diff line
@@ -493,6 +493,27 @@ out: 
}

EXPORT_SYMBOL_GPL(nfs_initiate_pgio);



int nfs_do_multiple_pgios(struct list_head *head,

				 const struct rpc_call_ops *call_ops,

				 int how)

{

	struct nfs_pgio_data *data;

	int ret = 0;



	while (!list_empty(head)) {

		int ret2;



		data = list_first_entry(head, struct nfs_pgio_data, list);

		list_del_init(&data->list);



		ret2 = nfs_initiate_pgio(NFS_CLIENT(data->header->inode),

					 data, call_ops, how, 0);

		if (ret == 0)

			 ret = ret2;

	}

	return ret;

}



/**

 * nfs_pgio_error - Clean up from a pageio error

 * @desc: IO descriptor

fs/nfs/read.c

+2 −30
Original line number Diff line number Diff line
@@ -161,34 +161,6 @@ static void nfs_initiate_read(struct nfs_pgio_data *data, struct rpc_message *ms 
	NFS_PROTO(inode)->read_setup(data, msg);

}



static int nfs_do_read(struct nfs_pgio_data *data,

		const struct rpc_call_ops *call_ops)

{

	struct inode *inode = data->header->inode;



	return nfs_initiate_pgio(NFS_CLIENT(inode), data, call_ops, 0, 0);

}



static int

nfs_do_multiple_reads(struct list_head *head,

		const struct rpc_call_ops *call_ops)

{

	struct nfs_pgio_data *data;

	int ret = 0;



	while (!list_empty(head)) {

		int ret2;



		data = list_first_entry(head, struct nfs_pgio_data, list);

		list_del_init(&data->list);



		ret2 = nfs_do_read(data, call_ops);

		if (ret == 0)

			ret = ret2;

	}

	return ret;

}



static void

nfs_async_read_error(struct list_head *head)

{
@@ -222,8 +194,8 @@ static int nfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) 
	atomic_inc(&hdr->refcnt);

	ret = nfs_generic_pgio(desc, hdr);

	if (ret == 0)

		ret = nfs_do_multiple_reads(&hdr->rpc_list,

					    desc->pg_rpc_callops);

		ret = nfs_do_multiple_pgios(&hdr->rpc_list,

					    desc->pg_rpc_callops, 0);

	if (atomic_dec_and_test(&hdr->refcnt))

		hdr->completion_ops->completion(hdr);

	return ret;

fs/nfs/write.c

+1 −30
Original line number Diff line number Diff line
@@ -945,35 +945,6 @@ static void nfs_initiate_write(struct nfs_pgio_data *data, struct rpc_message *m 
				 &task_setup_data->rpc_client, msg, data);

}



static int nfs_do_write(struct nfs_pgio_data *data,

		const struct rpc_call_ops *call_ops,

		int how)

{

	struct inode *inode = data->header->inode;



	return nfs_initiate_pgio(NFS_CLIENT(inode), data, call_ops, how, 0);

}



static int nfs_do_multiple_writes(struct list_head *head,

		const struct rpc_call_ops *call_ops,

		int how)

{

	struct nfs_pgio_data *data;

	int ret = 0;



	while (!list_empty(head)) {

		int ret2;



		data = list_first_entry(head, struct nfs_pgio_data, list);

		list_del_init(&data->list);

		

		ret2 = nfs_do_write(data, call_ops, how);

		 if (ret == 0)

			 ret = ret2;

	}

	return ret;

}



/* If a nfs_flush_* function fails, it should remove reqs from @head and

 * call this on each, which will prepare them to be retried on next

 * writeback using standard nfs.
@@ -1018,7 +989,7 @@ static int nfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) 
	atomic_inc(&hdr->refcnt);

	ret = nfs_generic_pgio(desc, hdr);

	if (ret == 0)

		ret = nfs_do_multiple_writes(&hdr->rpc_list,

		ret = nfs_do_multiple_pgios(&hdr->rpc_list,

					     desc->pg_rpc_callops,

					     desc->pg_ioflags);

	if (atomic_dec_and_test(&hdr->refcnt))

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