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Commit ce59515c authored by Anna Schumaker's avatar Anna Schumaker Committed by Trond Myklebust
Browse files

NFS: Create a common rpcsetup function for reads and writes 



Write adds a little bit of code dealing with flush flags, but since
"how" will always be 0 when reading we can share the code.

Signed-off-by: default avatarAnna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent 6f92fa45

fs/nfs/internal.h

+3 −0
Original line number Diff line number Diff line
@@ -242,6 +242,8 @@ struct nfs_rw_header *nfs_rw_header_alloc(const struct nfs_rw_ops *); 
void nfs_rw_header_free(struct nfs_pgio_header *);

struct nfs_pgio_data *nfs_pgio_data_alloc(struct nfs_pgio_header *, unsigned int);

void nfs_pgio_data_release(struct nfs_pgio_data *);

void nfs_pgio_rpcsetup(struct nfs_pgio_data *, unsigned int, unsigned int, int,

		       struct nfs_commit_info *);



static inline void nfs_iocounter_init(struct nfs_io_counter *c)

{
@@ -446,6 +448,7 @@ extern void nfs_init_commit(struct nfs_commit_data *data, 
			    struct nfs_commit_info *cinfo);

int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,

			 struct nfs_commit_info *cinfo, int max);

unsigned long nfs_reqs_to_commit(struct nfs_commit_info *);

int nfs_scan_commit(struct inode *inode, struct list_head *dst,

		    struct nfs_commit_info *cinfo);

void nfs_mark_request_commit(struct nfs_page *req,

fs/nfs/pagelist.c

+44 −0
Original line number Diff line number Diff line
@@ -388,6 +388,50 @@ void nfs_pgio_data_release(struct nfs_pgio_data *data) 
}

EXPORT_SYMBOL_GPL(nfs_pgio_data_release);



/**

 * nfs_pgio_rpcsetup - Set up arguments for a pageio call

 * @data: The pageio data

 * @count: Number of bytes to read

 * @offset: Initial offset

 * @how: How to commit data (writes only)

 * @cinfo: Commit information for the call (writes only)

 */

void nfs_pgio_rpcsetup(struct nfs_pgio_data *data,

			      unsigned int count, unsigned int offset,

			      int how, struct nfs_commit_info *cinfo)

{

	struct nfs_page *req = data->header->req;



	/* Set up the RPC argument and reply structs

	 * NB: take care not to mess about with data->commit et al. */



	data->args.fh     = NFS_FH(data->header->inode);

	data->args.offset = req_offset(req) + offset;

	/* pnfs_set_layoutcommit needs this */

	data->mds_offset = data->args.offset;

	data->args.pgbase = req->wb_pgbase + offset;

	data->args.pages  = data->pages.pagevec;

	data->args.count  = count;

	data->args.context = get_nfs_open_context(req->wb_context);

	data->args.lock_context = req->wb_lock_context;

	data->args.stable  = NFS_UNSTABLE;

	switch (how & (FLUSH_STABLE | FLUSH_COND_STABLE)) {

	case 0:

		break;

	case FLUSH_COND_STABLE:

		if (nfs_reqs_to_commit(cinfo))

			break;

	default:

		data->args.stable = NFS_FILE_SYNC;

	}



	data->res.fattr   = &data->fattr;

	data->res.count   = count;

	data->res.eof     = 0;

	data->res.verf    = &data->verf;

	nfs_fattr_init(&data->fattr);

}



/**

 * nfs_pgio_prepare - Prepare pageio data to go over the wire

 * @task: The current task

fs/nfs/read.c

+2 −24
Original line number Diff line number Diff line
@@ -192,28 +192,6 @@ int nfs_initiate_read(struct rpc_clnt *clnt, 
}

EXPORT_SYMBOL_GPL(nfs_initiate_read);



/*

 * Set up the NFS read request struct

 */

static void nfs_read_rpcsetup(struct nfs_pgio_data *data,

		unsigned int count, unsigned int offset)

{

	struct nfs_page *req = data->header->req;



	data->args.fh     = NFS_FH(data->header->inode);

	data->args.offset = req_offset(req) + offset;

	data->args.pgbase = req->wb_pgbase + offset;

	data->args.pages  = data->pages.pagevec;

	data->args.count  = count;

	data->args.context = get_nfs_open_context(req->wb_context);

	data->args.lock_context = req->wb_lock_context;



	data->res.fattr   = &data->fattr;

	data->res.count   = count;

	data->res.eof     = 0;

	nfs_fattr_init(&data->fattr);

}



static int nfs_do_read(struct nfs_pgio_data *data,

		const struct rpc_call_ops *call_ops)

{
@@ -305,7 +283,7 @@ static int nfs_pagein_multi(struct nfs_pageio_descriptor *desc, 
			return -ENOMEM;

		}

		data->pages.pagevec[0] = page;

		nfs_read_rpcsetup(data, len, offset);

		nfs_pgio_rpcsetup(data, len, offset, 0, NULL);

		list_add(&data->list, &hdr->rpc_list);

		nbytes -= len;

		offset += len;
@@ -340,7 +318,7 @@ static int nfs_pagein_one(struct nfs_pageio_descriptor *desc, 
		*pages++ = req->wb_page;

	}



	nfs_read_rpcsetup(data, desc->pg_count, 0);

	nfs_pgio_rpcsetup(data, desc->pg_count, 0, 0, NULL);

	list_add(&data->list, &hdr->rpc_list);

	desc->pg_rpc_callops = &nfs_pgio_common_ops;

	return 0;

fs/nfs/write.c

+4 −42
Original line number Diff line number Diff line
@@ -603,7 +603,7 @@ static void nfs_write_completion(struct nfs_pgio_header *hdr) 
}



#if  IS_ENABLED(CONFIG_NFS_V3) || IS_ENABLED(CONFIG_NFS_V4)

static unsigned long

unsigned long

nfs_reqs_to_commit(struct nfs_commit_info *cinfo)

{

	return cinfo->mds->ncommit;
@@ -660,7 +660,7 @@ nfs_scan_commit(struct inode *inode, struct list_head *dst, 
}



#else

static unsigned long nfs_reqs_to_commit(struct nfs_commit_info *cinfo)

unsigned long nfs_reqs_to_commit(struct nfs_commit_info *cinfo)

{

	return 0;

}
@@ -987,44 +987,6 @@ int nfs_initiate_write(struct rpc_clnt *clnt, 
}

EXPORT_SYMBOL_GPL(nfs_initiate_write);



/*

 * Set up the argument/result storage required for the RPC call.

 */

static void nfs_write_rpcsetup(struct nfs_pgio_data *data,

		unsigned int count, unsigned int offset,

		int how, struct nfs_commit_info *cinfo)

{

	struct nfs_page *req = data->header->req;



	/* Set up the RPC argument and reply structs

	 * NB: take care not to mess about with data->commit et al. */



	data->args.fh     = NFS_FH(data->header->inode);

	data->args.offset = req_offset(req) + offset;

	/* pnfs_set_layoutcommit needs this */

	data->mds_offset = data->args.offset;

	data->args.pgbase = req->wb_pgbase + offset;

	data->args.pages  = data->pages.pagevec;

	data->args.count  = count;

	data->args.context = get_nfs_open_context(req->wb_context);

	data->args.lock_context = req->wb_lock_context;

	data->args.stable  = NFS_UNSTABLE;

	switch (how & (FLUSH_STABLE | FLUSH_COND_STABLE)) {

	case 0:

		break;

	case FLUSH_COND_STABLE:

		if (nfs_reqs_to_commit(cinfo))

			break;

	default:

		data->args.stable = NFS_FILE_SYNC;

	}



	data->res.fattr   = &data->fattr;

	data->res.count   = count;

	data->res.verf    = &data->verf;

	nfs_fattr_init(&data->fattr);

}



static int nfs_do_write(struct nfs_pgio_data *data,

		const struct rpc_call_ops *call_ops,

		int how)
@@ -1129,7 +1091,7 @@ static int nfs_flush_multi(struct nfs_pageio_descriptor *desc, 
			return -ENOMEM;

		}

		data->pages.pagevec[0] = page;

		nfs_write_rpcsetup(data, len, offset, desc->pg_ioflags, &cinfo);

		nfs_pgio_rpcsetup(data, len, offset, desc->pg_ioflags, &cinfo);

		list_add(&data->list, &hdr->rpc_list);

		requests++;

		nbytes -= len;
@@ -1179,7 +1141,7 @@ static int nfs_flush_one(struct nfs_pageio_descriptor *desc, 
		desc->pg_ioflags &= ~FLUSH_COND_STABLE;



	/* Set up the argument struct */

	nfs_write_rpcsetup(data, desc->pg_count, 0, desc->pg_ioflags, &cinfo);

	nfs_pgio_rpcsetup(data, desc->pg_count, 0, desc->pg_ioflags, &cinfo);

	list_add(&data->list, &hdr->rpc_list);

	desc->pg_rpc_callops = &nfs_pgio_common_ops;

	return 0;