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NFSv4: Add support for the RELEASE_LOCKOWNER operation

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This is needed by NFSv4.0 servers in order to keep the number of locking
stateids at a manageable level.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust
2010-07-01 12:49:01 -04:00
parent daccbded7f
commit d3c7b7ccc1
6 changed files with 91 additions and 0 deletions
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55
fs/nfs/nfs4xdr.c
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@@ -220,6 +220,11 @@ static int nfs4_stat_to_errno(int);
4)
#define decode_locku_maxsz (op_decode_hdr_maxsz + \
decode_stateid_maxsz)
#define encode_release_lockowner_maxsz \
(op_encode_hdr_maxsz + \
encode_lockowner_maxsz)
#define decode_release_lockowner_maxsz \
(op_decode_hdr_maxsz)
#define encode_access_maxsz (op_encode_hdr_maxsz + 1)
#define decode_access_maxsz (op_decode_hdr_maxsz + 2)
#define encode_symlink_maxsz (op_encode_hdr_maxsz + \
@@ -474,6 +479,12 @@ static int nfs4_stat_to_errno(int);
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_locku_maxsz)
#define NFS4_enc_release_lockowner_sz \
(compound_encode_hdr_maxsz + \
encode_lockowner_maxsz)
#define NFS4_dec_release_lockowner_sz \
(compound_decode_hdr_maxsz + \
decode_lockowner_maxsz)
#define NFS4_enc_access_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
@@ -1116,6 +1127,17 @@ static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *ar
hdr->replen += decode_locku_maxsz;
}
static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
{
__be32 *p;
p = reserve_space(xdr, 4);
*p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
encode_lockowner(xdr, lowner);
hdr->nops++;
hdr->replen += decode_release_lockowner_maxsz;
}
static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
{
int len = name->len;
@@ -2056,6 +2078,20 @@ static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_
return 0;
}
static int nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req, __be32 *p, struct nfs_release_lockowner_args *args)
{
struct xdr_stream xdr;
struct compound_hdr hdr = {
.minorversion = 0,
};
xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_compound_hdr(&xdr, req, &hdr);
encode_release_lockowner(&xdr, &args->lock_owner, &hdr);
encode_nops(&hdr);
return 0;
}
/*
* Encode a READLINK request
*/
@@ -3981,6 +4017,11 @@ static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
return status;
}
static int decode_release_lockowner(struct xdr_stream *xdr)
{
return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
}
static int decode_lookup(struct xdr_stream *xdr)
{
return decode_op_hdr(xdr, OP_LOOKUP);
@@ -5267,6 +5308,19 @@ out:
return status;
}
static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
{
struct xdr_stream xdr;
struct compound_hdr hdr;
int status;
xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
status = decode_compound_hdr(&xdr, &hdr);
if (!status)
status = decode_release_lockowner(&xdr);
return status;
}
/*
* Decode READLINK response
*/
@@ -5874,6 +5928,7 @@ struct rpc_procinfo nfs4_procedures[] = {
PROC(GETACL, enc_getacl, dec_getacl),
PROC(SETACL, enc_setacl, dec_setacl),
PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
#if defined(CONFIG_NFS_V4_1)
PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
PROC(CREATE_SESSION, enc_create_session, dec_create_session),