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| author | Ricardo Labiaga <Ricardo.Labiaga@netapp.com> | 2009-04-01 15:22:54 +0200 |
|---|---|---|
| committer | Benny Halevy <bhalevy@panasas.com> | 2009-06-17 21:43:46 +0200 |
| commit | f4a2e418bfd03a1f25f515e8a92ecd584d96cfc1 (patch) | |
| tree | 31ea603214b4c68c338af9373b85eedfe0c11275 /net/sunrpc/clnt.c | |
| parent | nfs41: Add ability to read RPC call direction on TCP stream. (diff) | |
| download | linux-f4a2e418bfd03a1f25f515e8a92ecd584d96cfc1.tar.xz linux-f4a2e418bfd03a1f25f515e8a92ecd584d96cfc1.zip | |
nfs41: Process the RPC call direction
Reading and storing the RPC direction is a three step process.
1. xs_tcp_read_calldir() reads the RPC direction, but it will not store it
in the XDR buffer since the 'struct rpc_rqst' is not yet available.
2. The 'struct rpc_rqst' is obtained during the TCP_RCV_COPY_DATA state.
This state need not necessarily be preceeded by the TCP_RCV_READ_CALLDIR.
For example, we may be reading a continuation packet to a large reply.
Therefore, we can't simply obtain the 'struct rpc_rqst' during the
TCP_RCV_READ_CALLDIR state and assume it's available during TCP_RCV_COPY_DATA.
This patch adds a new TCP_RCV_READ_CALLDIR flag to indicate the need to
read the RPC direction. It then uses TCP_RCV_COPY_CALLDIR to indicate the
RPC direction needs to be saved after the 'struct rpc_rqst' has been allocated.
3. The 'struct rpc_rqst' is obtained by the xs_tcp_read_data() helper
functions. xs_tcp_read_common() then saves the RPC direction in the XDR
buffer if TCP_RCV_COPY_CALLDIR is set. This will happen when we're reading
the data immediately after the direction was read. xs_tcp_read_common()
then clears this flag.
[was nfs41: Skip past the RPC call direction]
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: sunrpc: Add RPC direction back into the XDR buffer]
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: sunrpc: Don't skip past the RPC call direction]
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Diffstat (limited to 'net/sunrpc/clnt.c')
| -rw-r--r-- | net/sunrpc/clnt.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index d00e8135f866..aca3ab6fc140 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -1390,13 +1390,14 @@ rpc_verify_header(struct rpc_task *task) } if ((len -= 3) < 0) goto out_overflow; - p += 1; /* skip XID */ + p += 1; /* skip XID */ if ((n = ntohl(*p++)) != RPC_REPLY) { dprintk("RPC: %5u %s: not an RPC reply: %x\n", - task->tk_pid, __func__, n); + task->tk_pid, __func__, n); goto out_garbage; } + if ((n = ntohl(*p++)) != RPC_MSG_ACCEPTED) { if (--len < 0) goto out_overflow; |