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NFSv4.1: layoutcommit

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The filelayout driver sends LAYOUTCOMMIT only when COMMIT goes to
the data server (as opposed to the MDS) and the data server WRITE
is not NFS_FILE_SYNC.

Only whole file layout support means that there is only one IOMODE_RW layout
segment.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Alexandros Batsakis <batsakis@netapp.com>
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Dean Hildebrand <dhildeb@us.ibm.com>
Signed-off-by: Fred Isaman <iisaman@citi.umich.edu>
Signed-off-by: Mingyang Guo <guomingyang@nrchpc.ac.cn>
Signed-off-by: Tao Guo <guotao@nrchpc.ac.cn>
Signed-off-by: Zhang Jingwang <zhangjingwang@nrchpc.ac.cn>
Tested-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Andy Adamson
2011-03-23 13:27:54 +00:00
committed by Trond Myklebust
parent e0c2b38018
commit 863a3c6c68
11 changed files with 387 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

129
fs/nfs/nfs4xdr.c
View File

@@ -324,6 +324,18 @@ static int nfs4_stat_to_errno(int);
#define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
decode_stateid_maxsz + \
XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
#define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
2 /* offset */ + \
2 /* length */ + \
1 /* reclaim */ + \
encode_stateid_maxsz + \
1 /* new offset (true) */ + \
2 /* last byte written */ + \
1 /* nt_timechanged (false) */ + \
1 /* layoutupdate4 layout type */ + \
1 /* NULL filelayout layoutupdate4 payload */)
#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
#else /* CONFIG_NFS_V4_1 */
#define encode_sequence_maxsz 0
#define decode_sequence_maxsz 0
@@ -727,6 +739,17 @@ static int nfs4_stat_to_errno(int);
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_layoutget_maxsz)
#define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz +\
encode_putfh_maxsz + \
encode_layoutcommit_maxsz + \
encode_getattr_maxsz)
#define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_layoutcommit_maxsz + \
decode_getattr_maxsz)
const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
compound_encode_hdr_maxsz +
@@ -1816,6 +1839,34 @@ encode_layoutget(struct xdr_stream *xdr,
hdr->nops++;
hdr->replen += decode_layoutget_maxsz;
}
static int
encode_layoutcommit(struct xdr_stream *xdr,
const struct nfs4_layoutcommit_args *args,
struct compound_hdr *hdr)
{
__be32 *p;
dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
NFS_SERVER(args->inode)->pnfs_curr_ld->id);
p = reserve_space(xdr, 48 + NFS4_STATEID_SIZE);
*p++ = cpu_to_be32(OP_LAYOUTCOMMIT);
/* Only whole file layouts */
p = xdr_encode_hyper(p, 0); /* offset */
p = xdr_encode_hyper(p, NFS4_MAX_UINT64); /* length */
*p++ = cpu_to_be32(0); /* reclaim */
p = xdr_encode_opaque_fixed(p, args->stateid.data, NFS4_STATEID_SIZE);
*p++ = cpu_to_be32(1); /* newoffset = TRUE */
p = xdr_encode_hyper(p, args->lastbytewritten);
*p++ = cpu_to_be32(0); /* Never send time_modify_changed */
*p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
*p++ = cpu_to_be32(0); /* no file layout payload */
hdr->nops++;
hdr->replen += decode_layoutcommit_maxsz;
return 0;
}
#endif /* CONFIG_NFS_V4_1 */
/*
@@ -2607,6 +2658,26 @@ static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
encode_layoutget(xdr, args, &hdr);
encode_nops(&hdr);
}
/*
* Encode LAYOUTCOMMIT request
*/
static int nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs4_layoutcommit_args *args)
{
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, NFS_FH(args->inode), &hdr);
encode_layoutcommit(xdr, args, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
encode_nops(&hdr);
return 0;
}
#endif /* CONFIG_NFS_V4_1 */
static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
@@ -5007,6 +5078,35 @@ out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
static int decode_layoutcommit(struct xdr_stream *xdr,
struct rpc_rqst *req,
struct nfs4_layoutcommit_res *res)
{
__be32 *p;
__u32 sizechanged;
int status;
status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
if (status)
return status;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
sizechanged = be32_to_cpup(p);
if (sizechanged) {
/* throw away new size */
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
}
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
#endif /* CONFIG_NFS_V4_1 */
/*
@@ -6068,6 +6168,34 @@ static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
out:
return status;
}
/*
* Decode LAYOUTCOMMIT response
*/
static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs4_layoutcommit_res *res)
{
struct compound_hdr hdr;
int status;
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;
status = decode_layoutcommit(xdr, rqstp, res);
if (status)
goto out;
decode_getfattr(xdr, res->fattr, res->server,
!RPC_IS_ASYNC(rqstp->rq_task));
out:
return status;
}
#endif /* CONFIG_NFS_V4_1 */
/**
@@ -6269,6 +6397,7 @@ struct rpc_procinfo nfs4_procedures[] = {
PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
#endif /* CONFIG_NFS_V4_1 */
};