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Commit be3a5d23 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFSv.2/pnfs Add a LAYOUTSTATS rpc function 



Reviewed-by: default avatarJeff Layton <jeff.layton@primarydata.com>
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: default avatarPeng Tao <tao.peng@primarydata.com>
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent 1372a313

fs/nfs/nfs42.h

+8 −1
Original line number Diff line number Diff line
@@ -5,11 +5,18 @@ 
#ifndef __LINUX_FS_NFS_NFS4_2_H

#define __LINUX_FS_NFS_NFS4_2_H



/*

 * FIXME:  four LAYOUTSTATS calls per compound at most! Do we need to support

 * more? Need to consider not to pre-alloc too much for a compound.

 */

#define PNFS_LAYOUTSTATS_MAXDEV (4)



/* nfs4.2proc.c */

int nfs42_proc_allocate(struct file *, loff_t, loff_t);

int nfs42_proc_deallocate(struct file *, loff_t, loff_t);

loff_t nfs42_proc_llseek(struct file *, loff_t, int);



int nfs42_proc_layoutstats_generic(struct nfs_server *,

				   struct nfs42_layoutstat_data *);

/* nfs4.2xdr.h */

extern struct rpc_procinfo nfs4_2_procedures[];

fs/nfs/nfs42proc.c

+27 −0
Original line number Diff line number Diff line
@@ -165,3 +165,30 @@ loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) 


	return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);

}



static const struct rpc_call_ops nfs42_layoutstat_ops = {

};



int nfs42_proc_layoutstats_generic(struct nfs_server *server,

				   struct nfs42_layoutstat_data *data)

{

	struct rpc_message msg = {

		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],

		.rpc_argp = &data->args,

		.rpc_resp = &data->res,

	};

	struct rpc_task_setup task_setup = {

		.rpc_client = server->client,

		.rpc_message = &msg,

		.callback_ops = &nfs42_layoutstat_ops,

		.callback_data = data,

		.flags = RPC_TASK_ASYNC,

	};

	struct rpc_task *task;



	nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);

	task = rpc_run_task(&task_setup);

	if (IS_ERR(task))

		return PTR_ERR(task);

	return 0;

}

fs/nfs/nfs42xdr.c

+122 −0
Original line number Diff line number Diff line
@@ -4,6 +4,8 @@ 
#ifndef __LINUX_FS_NFS_NFS4_2XDR_H

#define __LINUX_FS_NFS_NFS4_2XDR_H



#include "nfs42.h"



#define encode_fallocate_maxsz		(encode_stateid_maxsz + \

					 2 /* offset */ + \

					 2 /* length */)
@@ -22,6 +24,16 @@ 
					 1 /* whence */ + \

					 2 /* offset */ + \

					 2 /* length */)

#define encode_io_info_maxsz		4

#define encode_layoutstats_maxsz	(op_decode_hdr_maxsz + \

					2 /* offset */ + \

					2 /* length */ + \

					encode_stateid_maxsz + \

					encode_io_info_maxsz + \

					encode_io_info_maxsz + \

					1 /* opaque devaddr4 length */ + \

					XDR_QUADLEN(PNFS_LAYOUTSTATS_MAXSIZE))

#define decode_layoutstats_maxsz	(op_decode_hdr_maxsz)



#define NFS4_enc_allocate_sz		(compound_encode_hdr_maxsz + \

					 encode_putfh_maxsz + \
@@ -45,6 +57,14 @@ 
#define NFS4_dec_seek_sz		(compound_decode_hdr_maxsz + \

					 decode_putfh_maxsz + \

					 decode_seek_maxsz)

#define NFS4_enc_layoutstats_sz		(compound_encode_hdr_maxsz + \

					 encode_sequence_maxsz + \

					 encode_putfh_maxsz + \

					 PNFS_LAYOUTSTATS_MAXDEV * encode_layoutstats_maxsz)

#define NFS4_dec_layoutstats_sz		(compound_decode_hdr_maxsz + \

					 decode_sequence_maxsz + \

					 decode_putfh_maxsz + \

					 PNFS_LAYOUTSTATS_MAXDEV * decode_layoutstats_maxsz)





static void encode_fallocate(struct xdr_stream *xdr,
@@ -81,6 +101,33 @@ static void encode_seek(struct xdr_stream *xdr, 
	encode_uint32(xdr, args->sa_what);

}



static void encode_layoutstats(struct xdr_stream *xdr,

			       struct nfs42_layoutstat_args *args,

			       struct nfs42_layoutstat_devinfo *devinfo,

			       struct compound_hdr *hdr)

{

	__be32 *p;



	encode_op_hdr(xdr, OP_LAYOUTSTATS, decode_layoutstats_maxsz, hdr);

	p = reserve_space(xdr, 8 + 8);

	p = xdr_encode_hyper(p, devinfo->offset);

	p = xdr_encode_hyper(p, devinfo->length);

	encode_nfs4_stateid(xdr, &args->stateid);

	p = reserve_space(xdr, 4*8 + NFS4_DEVICEID4_SIZE + 4);

	p = xdr_encode_hyper(p, devinfo->read_count);

	p = xdr_encode_hyper(p, devinfo->read_bytes);

	p = xdr_encode_hyper(p, devinfo->write_count);

	p = xdr_encode_hyper(p, devinfo->write_bytes);

	p = xdr_encode_opaque_fixed(p, devinfo->dev_id.data,

			NFS4_DEVICEID4_SIZE);

	/* Encode layoutupdate4 */

	*p++ = cpu_to_be32(devinfo->layout_type);

	if (devinfo->layoutstats_encode != NULL)

		devinfo->layoutstats_encode(xdr, args, devinfo);

	else

		encode_uint32(xdr, 0);

}



/*

 * Encode ALLOCATE request

 */
@@ -137,6 +184,28 @@ static void nfs4_xdr_enc_seek(struct rpc_rqst *req, 
	encode_nops(&hdr);

}



/*

 * Encode LAYOUTSTATS request

 */

static void nfs4_xdr_enc_layoutstats(struct rpc_rqst *req,

				     struct xdr_stream *xdr,

				     struct nfs42_layoutstat_args *args)

{

	int i;



	struct compound_hdr hdr = {

		.minorversion = nfs4_xdr_minorversion(&args->seq_args),

	};



	encode_compound_hdr(xdr, req, &hdr);

	encode_sequence(xdr, &args->seq_args, &hdr);

	encode_putfh(xdr, args->fh, &hdr);

	WARN_ON(args->num_dev > PNFS_LAYOUTSTATS_MAXDEV);

	for (i = 0; i < args->num_dev; i++)

		encode_layoutstats(xdr, args, &args->devinfo[i], &hdr);

	encode_nops(&hdr);

}



static int decode_allocate(struct xdr_stream *xdr, struct nfs42_falloc_res *res)

{

	return decode_op_hdr(xdr, OP_ALLOCATE);
@@ -169,6 +238,28 @@ static int decode_seek(struct xdr_stream *xdr, struct nfs42_seek_res *res) 
	return -EIO;

}



static int decode_layoutstats(struct xdr_stream *xdr,

			      struct nfs42_layoutstat_res *res)

{

	int status;

	__be32 *p;



	status = decode_op_hdr(xdr, OP_LAYOUTSTATS);

	if (status)

		return status;



	p = xdr_inline_decode(xdr, 4);

	if (unlikely(!p))

		goto out_overflow;



	res->rpc_status = be32_to_cpup(p++);

	return 0;



out_overflow:

	print_overflow_msg(__func__, xdr);

	return -EIO;

}



/*

 * Decode ALLOCATE request

 */
@@ -246,4 +337,35 @@ static int nfs4_xdr_dec_seek(struct rpc_rqst *rqstp, 
out:

	return status;

}



/*

 * Decode LAYOUTSTATS request

 */

static int nfs4_xdr_dec_layoutstats(struct rpc_rqst *rqstp,

				    struct xdr_stream *xdr,

				    struct nfs42_layoutstat_res *res)

{

	struct compound_hdr hdr;

	int status, i;



	status = decode_compound_hdr(xdr, &hdr);

	if (status)

		goto out;

	status = decode_sequence(xdr, &res->seq_res, rqstp);

	if (status)

		goto out;

	status = decode_putfh(xdr);

	if (status)

		goto out;

	WARN_ON(res->num_dev > PNFS_LAYOUTSTATS_MAXDEV);

	for (i = 0; i < res->num_dev; i++) {

		status = decode_layoutstats(xdr, res);

		if (status)

			goto out;

	}

out:

	res->rpc_status = status;

	return status;

}



#endif /* __LINUX_FS_NFS_NFS4_2XDR_H */

fs/nfs/nfs4_fs.h

+1 −0
Original line number Diff line number Diff line
@@ -233,6 +233,7 @@ extern int nfs4_handle_exception(struct nfs_server *, int, struct nfs4_exception 
extern int nfs4_call_sync(struct rpc_clnt *, struct nfs_server *,

			  struct rpc_message *, struct nfs4_sequence_args *,

			  struct nfs4_sequence_res *, int);

extern void nfs4_init_sequence(struct nfs4_sequence_args *, struct nfs4_sequence_res *, int);

extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struct rpc_cred *, struct nfs4_setclientid_res *);

extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct nfs4_setclientid_res *arg, struct rpc_cred *);

extern int nfs4_proc_get_rootfh(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *, bool);

fs/nfs/nfs4proc.c

+2 −2
Original line number Diff line number Diff line
@@ -476,7 +476,7 @@ struct nfs4_call_sync_data { 
	struct nfs4_sequence_res *seq_res;

};



static void nfs4_init_sequence(struct nfs4_sequence_args *args,

void nfs4_init_sequence(struct nfs4_sequence_args *args,

			struct nfs4_sequence_res *res, int cache_reply)

{

	args->sa_slot = NULL;