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NFSv.2/pnfs Add a LAYOUTSTATS rpc function

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Reviewed-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust
2015-06-23 19:51:55 +08:00
parent 1372a3130a
commit be3a5d2339
8 changed files with 205 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

122
fs/nfs/nfs42xdr.c
View File

@@ -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 @@ out_overflow:
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 */