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NFSD: Add a helper to decode channel_attrs4

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De-duplicate some code.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2020-11-16 15:35:05 -05:00
parent 10ff842281
commit 3a3f1fbacb
1 changed files with 38 additions and 33 deletions
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71
fs/nfsd/nfs4xdr.c
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@ -1614,6 +1614,38 @@ nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
return nfsd4_decode_nfs_impl_id4(argp, exid);
}
static __be32
nfsd4_decode_channel_attrs4(struct nfsd4_compoundargs *argp,
struct nfsd4_channel_attrs *ca)
{
__be32 *p;
p = xdr_inline_decode(argp->xdr, XDR_UNIT * 7);
if (!p)
return nfserr_bad_xdr;
/* headerpadsz is ignored */
p++;
ca->maxreq_sz = be32_to_cpup(p++);
ca->maxresp_sz = be32_to_cpup(p++);
ca->maxresp_cached = be32_to_cpup(p++);
ca->maxops = be32_to_cpup(p++);
ca->maxreqs = be32_to_cpup(p++);
ca->nr_rdma_attrs = be32_to_cpup(p);
switch (ca->nr_rdma_attrs) {
case 0:
break;
case 1:
if (xdr_stream_decode_u32(argp->xdr, &ca->rdma_attrs) < 0)
return nfserr_bad_xdr;
break;
default:
return nfserr_bad_xdr;
}
return nfs_ok;
}
static __be32
nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
struct nfsd4_create_session *sess)
@ -1625,39 +1657,12 @@ nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
sess->seqid = be32_to_cpup(p++);
sess->flags = be32_to_cpup(p++);
/* Fore channel attrs */
READ_BUF(28);
p++; /* headerpadsz is always 0 */
sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
sess->fore_channel.maxops = be32_to_cpup(p++);
sess->fore_channel.maxreqs = be32_to_cpup(p++);
sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
if (sess->fore_channel.nr_rdma_attrs == 1) {
READ_BUF(4);
sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
} else if (sess->fore_channel.nr_rdma_attrs > 1) {
dprintk("Too many fore channel attr bitmaps!\n");
goto xdr_error;
}
/* Back channel attrs */
READ_BUF(28);
p++; /* headerpadsz is always 0 */
sess->back_channel.maxreq_sz = be32_to_cpup(p++);
sess->back_channel.maxresp_sz = be32_to_cpup(p++);
sess->back_channel.maxresp_cached = be32_to_cpup(p++);
sess->back_channel.maxops = be32_to_cpup(p++);
sess->back_channel.maxreqs = be32_to_cpup(p++);
sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
if (sess->back_channel.nr_rdma_attrs == 1) {
READ_BUF(4);
sess->back_channel.rdma_attrs = be32_to_cpup(p++);
} else if (sess->back_channel.nr_rdma_attrs > 1) {
dprintk("Too many back channel attr bitmaps!\n");
goto xdr_error;
}
status = nfsd4_decode_channel_attrs4(argp, &sess->fore_channel);
if (status)
return status;
status = nfsd4_decode_channel_attrs4(argp, &sess->back_channel);
if (status)
return status;
READ_BUF(4);
sess->callback_prog = be32_to_cpup(p++);