kernel/linux.git/net/appletalk/ddp.c, branch v6.4

net: remove noblock parameter from skb_recv_datagram()

2022-04-06T12:45:26+00:00

skb_recv_datagram() has two parameters 'flags' and 'noblock' that are merged inside skb_recv_datagram() by 'flags | (noblock ? MSG_DONTWAIT : 0)' As 'flags' may contain MSG_DONTWAIT as value most callers split the 'flags' into 'flags' and 'noblock' with finally obsolete bit operations like this: skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &rc); And this is not even done consistently with the 'flags' parameter. This patch removes the obsolete and costly splitting into two parameters and only performs bit operations when really needed on the caller side. One missing conversion thankfully reported by kernel test robot. I missed to enable kunit tests to build the mctp code. Reported-by: kernel test robot Signed-off-by: Oliver Hartkopp Signed-off-by: David S. Miller

net: socket: rework compat_ifreq_ioctl()

2021-07-23T13:20:25+00:00

compat_ifreq_ioctl() is one of the last users of copy_in_user() and compat_alloc_user_space(), as it attempts to convert the 'struct ifreq' arguments from 32-bit to 64-bit format as used by dev_ioctl() and a couple of socket family specific interpretations. The current implementation works correctly when calling dev_ioctl(), inet_ioctl(), ieee802154_sock_ioctl(), atalk_ioctl(), qrtr_ioctl() and packet_ioctl(). The ioctl handlers for x25, netrom, rose and x25 do not interpret the arguments and only block the corresponding commands, so they do not care. For af_inet6 and af_decnet however, the compat conversion is slightly incorrect, as it will copy more data than the native handler accesses, both of them use a structure that is shorter than ifreq. Replace the copy_in_user() conversion with a pair of accessor functions to read and write the ifreq data in place with the correct length where needed, while leaving the other ones to copy the (already compatible) structures directly. Signed-off-by: Arnd Bergmann Reviewed-by: Christoph Hellwig Signed-off-by: David S. Miller

net: appletalk: fix some mistakes in grammar

2021-06-09T02:27:57+00:00

Fix some mistakes in grammar. Signed-off-by: gushengxian Signed-off-by: David S. Miller

appletalk: Fix skb allocation size in loopback case

2021-02-13T00:40:28+00:00

If a DDP broadcast packet is sent out to a non-gateway target, it is also looped back. There is a potential for the loopback device to have a longer hardware header length than the original target route's device, which can result in the skb not being created with enough room for the loopback device's hardware header. This patch fixes the issue by determining that a loopback will be necessary prior to allocating the skb, and if so, ensuring the skb has enough room. This was discovered while testing a new driver that creates a LocalTalk network interface (LTALK_HLEN = 1). It caused an skb_under_panic. Signed-off-by: Doug Brown Signed-off-by: David S. Miller

net: appletalk: fix kerneldoc warnings

2020-10-30T18:48:17+00:00

net/appletalk/aarp.c:68: warning: Function parameter or member 'dev' not described in 'aarp_entry' net/appletalk/aarp.c:68: warning: Function parameter or member 'expires_at' not described in 'aarp_entry' net/appletalk/aarp.c:68: warning: Function parameter or member 'hwaddr' not described in 'aarp_entry' net/appletalk/aarp.c:68: warning: Function parameter or member 'last_sent' not described in 'aarp_entry' net/appletalk/aarp.c:68: warning: Function parameter or member 'next' not described in 'aarp_entry' net/appletalk/aarp.c:68: warning: Function parameter or member 'packet_queue' not described in 'aarp_entry' net/appletalk/aarp.c:68: warning: Function parameter or member 'status' not described in 'aarp_entry' net/appletalk/aarp.c:68: warning: Function parameter or member 'target_addr' not described in 'aarp_entry' net/appletalk/aarp.c:68: warning: Function parameter or member 'xmit_count' not described in 'aarp_entry' net/appletalk/ddp.c:1422: warning: Function parameter or member 'dev' not described in 'atalk_rcv' net/appletalk/ddp.c:1422: warning: Function parameter or member 'orig_dev' not described in 'atalk_rcv' net/appletalk/ddp.c:1422: warning: Function parameter or member 'pt' not described in 'atalk_rcv' net/appletalk/ddp.c:1422: warning: Function parameter or member 'skb' not described in 'atalk_rcv' Signed-off-by: Andrew Lunn Link: https://lore.kernel.org/r/20201028005527.930388-1-andrew@lunn.ch Signed-off-by: Jakub Kicinski

net: make ->{get,set}sockopt in proto_ops optional

2020-07-20T01:16:41+00:00

Just check for a NULL method instead of wiring up sock_no_{get,set}sockopt. Signed-off-by: Christoph Hellwig Acked-by: Marc Kleine-Budde Signed-off-by: David S. Miller

ipv4,appletalk: move SIOCADDRT and SIOCDELRT handling into ->compat_ioctl

2020-05-19T00:35:02+00:00

To prepare removing the global routing_ioctl hack start lifting the code into the ipv4 and appletalk ->compat_ioctl handlers. Unlike the existing handler we don't bother copying in the name - there are no compat issues for char arrays. Signed-off-by: Christoph Hellwig Signed-off-by: David S. Miller

appletalk: factor out a atrtr_ioctl_addrt helper

2020-05-19T00:35:02+00:00

Add a helper than can be shared with the upcoming compat ioctl handler. Signed-off-by: Christoph Hellwig Signed-off-by: David S. Miller

appletalk: enforce CAP_NET_RAW for raw sockets

2019-09-24T14:37:18+00:00

When creating a raw AF_APPLETALK socket, CAP_NET_RAW needs to be checked first. Signed-off-by: Ori Nimron Signed-off-by: Greg Kroah-Hartman Signed-off-by: David S. Miller

net: Use skb_frag_off accessors

2019-07-30T21:21:32+00:00

Use accessor functions for skb fragment's page_offset instead of direct references, in preparation for bvec conversion. Signed-off-by: Jonathan Lemon Signed-off-by: David S. Miller