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xprtrdma: Add trace points in reply decoder path

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This includes decoding Write and Reply chunks, and fixing up inline
payloads.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever
2017-12-20 16:31:04 -05:00
committed by Anna Schumaker
parent 58f10ad40d
commit e11b7c9655
2 changed files with 102 additions and 20 deletions
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29
net/sunrpc/xprtrdma/rpc_rdma.c
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@@ -914,8 +914,7 @@ rpcrdma_inline_fixup(struct rpc_rqst *rqst, char *srcp, int copy_len, int pad)
curlen = rqst->rq_rcv_buf.head[0].iov_len;
if (curlen > copy_len)
curlen = copy_len;
dprintk("RPC: %s: srcp 0x%p len %d hdrlen %d\n",
__func__, srcp, copy_len, curlen);
trace_xprtrdma_fixup(rqst, copy_len, curlen);
srcp += curlen;
copy_len -= curlen;
@@ -935,9 +934,8 @@ rpcrdma_inline_fixup(struct rpc_rqst *rqst, char *srcp, int copy_len, int pad)
if (curlen > pagelist_len)
curlen = pagelist_len;
dprintk("RPC: %s: page %d"
" srcp 0x%p len %d curlen %d\n",
__func__, i, srcp, copy_len, curlen);
trace_xprtrdma_fixup_pg(rqst, i, srcp,
copy_len, curlen);
destp = kmap_atomic(ppages[i]);
memcpy(destp + page_base, srcp, curlen);
flush_dcache_page(ppages[i]);
@@ -1028,26 +1026,19 @@ out_short:
static int decode_rdma_segment(struct xdr_stream *xdr, u32 *length)
{
u32 handle;
u64 offset;
__be32 *p;
p = xdr_inline_decode(xdr, 4 * sizeof(*p));
if (unlikely(!p))
return -EIO;
ifdebug(FACILITY) {
u64 offset;
u32 handle;
handle = be32_to_cpup(p++);
*length = be32_to_cpup(p++);
xdr_decode_hyper(p, &offset);
dprintk("RPC: %s: segment %u@0x%016llx:0x%08x\n",
__func__, *length, (unsigned long long)offset,
handle);
} else {
*length = be32_to_cpup(p + 1);
}
handle = be32_to_cpup(p++);
*length = be32_to_cpup(p++);
xdr_decode_hyper(p, &offset);
trace_xprtrdma_decode_seg(handle, *length, offset);
return 0;
}
@@ -1068,8 +1059,6 @@ static int decode_write_chunk(struct xdr_stream *xdr, u32 *length)
*length += seglength;
}
dprintk("RPC: %s: segcount=%u, %u bytes\n",
__func__, be32_to_cpup(p), *length);
return 0;
}