rsocket: Handle SHUT_RD/WR shutdown flags

Sridhar Samudrala <sri@us.ibm.com> reported an error (EOPNOTSUPP)
after calling select().

The issue is that rshutdown(SHUT_WR) was called before select().
As part of shutdown, rsockets switches the underlying fd from
nonblocking to blocking to ensure that previously sent data has
completed.  shutdown(SHUT_WR) indicates that the socket should be
kept open for receiving data.

Delay handling the actual shutdown unless SHUT_RDWR is specified,
or the socket is closed.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>

diff --git a/src/rsocket.c b/src/rsocket.c
index c11179701833b0b18b2f5b42b9614948e3c6b2f9..8f20b4abdcaf0a1421ec85e5e5a943331d317061 100644 (file)
--- a/src/rsocket.c
+++ b/src/rsocket.c
@@ -1592,6 +1592,9 @@ int rshutdown(int socket, int how)
        struct rsocket *rs;
        int ret = 0;
 
+       if (how != SHUT_RDWR)
+               return 0;
+
        rs = idm_at(&idm, socket);
        if (rs->fd_flags & O_NONBLOCK)
                rs_set_nonblocking(rs, 0);