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authorMat Martineau <mathewm@codeaurora.org>2010-09-08 10:05:29 -0700
committerGustavo F. Padovan <padovan@profusion.mobi>2010-10-12 12:44:51 -0300
commit6fdf482bb3298267816be59d9a3dce29632382d3 (patch)
treefdafe307f45bae2e185730db7e92553d4f946337 /net/bluetooth
parent3d7d01dffec4a6757ed1e3182f01c7ef5caa2539 (diff)
downloadlinux-6fdf482bb3298267816be59d9a3dce29632382d3.tar.bz2
Bluetooth: Use a stream-oriented recvmsg with SOCK_STREAM L2CAP sockets.
L2CAP ERTM sockets can be opened with the SOCK_STREAM socket type, which is a mandatory request for ERTM mode. However, these sockets still have SOCK_SEQPACKET read semantics when bt_sock_recvmsg() is used to pull data from the receive queue. If the application is only reading part of a frame, then the unread portion of the frame is discarded. If the application requests more bytes than are in the current frame, only the current frame's data is returned. This patch utilizes common code derived from RFCOMM's recvmsg() function to make L2CAP SOCK_STREAM reads behave like RFCOMM reads (and other SOCK_STREAM sockets in general). The application may read one byte at a time from the input stream and not lose any data, and may also read across L2CAP frame boundaries. Signed-off-by: Mat Martineau <mathewm@codeaurora.org> Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Diffstat (limited to 'net/bluetooth')
-rw-r--r--net/bluetooth/l2cap.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 2f625b87a89e..a9e7470d3cea 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -1951,6 +1951,9 @@ static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct ms
release_sock(sk);
+ if (sock->type == SOCK_STREAM)
+ return bt_sock_stream_recvmsg(iocb, sock, msg, len, flags);
+
return bt_sock_recvmsg(iocb, sock, msg, len, flags);
}