diff options
| author | Chuck Lever <chuck.lever@oracle.com> | 2017-08-01 12:00:14 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2017-08-24 22:13:50 -0400 |
| commit | 7075a867ce5748007b299bd28f12754cd51719d4 (patch) | |
| tree | b009fd5045e9ff602bb1682944b2e053ea23e37b /net/sunrpc/xprtrdma/svc_rdma_rw.c | |
| parent | afea5657c20b11ec9f895ac5cc33b560fb1e0276 (diff) | |
svcrdma: Clean up svc_rdma_build_read_chunk()
Dan Carpenter <dan.carpenter@oracle.com> observed that the while()
loop in svc_rdma_build_read_chunk() does not document the assumption
that the loop interior is always executed at least once.
Defensive: the function now returns -EINVAL if this assumption
fails.
Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'net/sunrpc/xprtrdma/svc_rdma_rw.c')
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_rw.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_rw.c b/net/sunrpc/xprtrdma/svc_rdma_rw.c index 933f79bed270..1f34fae7aec0 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_rw.c +++ b/net/sunrpc/xprtrdma/svc_rdma_rw.c @@ -660,19 +660,21 @@ out_initerr: return -EIO; } +/* Walk the segments in the Read chunk starting at @p and construct + * RDMA Read operations to pull the chunk to the server. + */ static int svc_rdma_build_read_chunk(struct svc_rqst *rqstp, struct svc_rdma_read_info *info, __be32 *p) { int ret; + ret = -EINVAL; info->ri_chunklen = 0; - while (*p++ != xdr_zero) { + while (*p++ != xdr_zero && be32_to_cpup(p++) == info->ri_position) { u32 rs_handle, rs_length; u64 rs_offset; - if (be32_to_cpup(p++) != info->ri_position) - break; rs_handle = be32_to_cpup(p++); rs_length = be32_to_cpup(p++); p = xdr_decode_hyper(p, &rs_offset); |