diff options
| author | Andy Adamson <andros@netapp.com> | 2010-01-14 23:45:08 +0100 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2010-02-10 14:30:58 +0100 |
| commit | 4911096f1a5df73c12c287a42ece4e7b5d9c19ec (patch) | |
| tree | 4e59b70fe7bfbea730ebcf829312f2bce7350040 /fs/nfs/callback_xdr.c | |
| parent | nfs41: prepare for back channel drc (diff) | |
| download | linux-4911096f1a5df73c12c287a42ece4e7b5d9c19ec.tar.xz linux-4911096f1a5df73c12c287a42ece4e7b5d9c19ec.zip | |
nfs41: back channel drc minimal implementation
For now the back channel ca_maxresponsesize_cached is 0 and there is no
backchannel DRC. Return NFS4ERR_REP_TOO_BIG_TO_CACHE when a cb_sequence
cachethis is true. When it is false, return NFS4ERR_RETRY_UNCACHED_REP as the
next operation error.
Remember the replay error accross compound operation processing.
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/callback_xdr.c')
| -rw-r--r-- | fs/nfs/callback_xdr.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c index a6f2ded72b17..08b430d922c4 100644 --- a/fs/nfs/callback_xdr.c +++ b/fs/nfs/callback_xdr.c @@ -605,7 +605,7 @@ preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op) static __be32 process_op(uint32_t minorversion, int nop, struct svc_rqst *rqstp, struct xdr_stream *xdr_in, void *argp, - struct xdr_stream *xdr_out, void *resp) + struct xdr_stream *xdr_out, void *resp, int* drc_status) { struct callback_op *op = &callback_ops[0]; unsigned int op_nr; @@ -628,6 +628,11 @@ static __be32 process_op(uint32_t minorversion, int nop, if (status) goto encode_hdr; + if (*drc_status) { + status = *drc_status; + goto encode_hdr; + } + maxlen = xdr_out->end - xdr_out->p; if (maxlen > 0 && maxlen < PAGE_SIZE) { status = op->decode_args(rqstp, xdr_in, argp); @@ -636,6 +641,12 @@ static __be32 process_op(uint32_t minorversion, int nop, } else status = htonl(NFS4ERR_RESOURCE); + /* Only set by OP_CB_SEQUENCE processing */ + if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) { + *drc_status = status; + status = 0; + } + encode_hdr: res = encode_op_hdr(xdr_out, op_nr, status); if (unlikely(res)) @@ -655,7 +666,7 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *r struct cb_compound_hdr_res hdr_res = { NULL }; struct xdr_stream xdr_in, xdr_out; __be32 *p; - __be32 status; + __be32 status, drc_status = 0; unsigned int nops = 0; dprintk("%s: start\n", __func__); @@ -675,8 +686,8 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *r return rpc_system_err; while (status == 0 && nops != hdr_arg.nops) { - status = process_op(hdr_arg.minorversion, nops, - rqstp, &xdr_in, argp, &xdr_out, resp); + status = process_op(hdr_arg.minorversion, nops, rqstp, + &xdr_in, argp, &xdr_out, resp, &drc_status); nops++; } |