/* * File: datagram.c * * Datagram (ISI) Phonet sockets * * Copyright (C) 2008 Nokia Corporation. * * Authors: Sakari Ailus * Rémi Denis-Courmont * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA */ #include #include #include #include #include #include #include #include static int pn_backlog_rcv(struct sock *sk, struct sk_buff *skb); /* associated socket ceases to exist */ static void pn_sock_close(struct sock *sk, long timeout) { sk_common_release(sk); } static int pn_ioctl(struct sock *sk, int cmd, unsigned long arg) { struct sk_buff *skb; int answ; switch (cmd) { case SIOCINQ: lock_sock(sk); skb = skb_peek(&sk->sk_receive_queue); answ = skb ? skb->len : 0; release_sock(sk); return put_user(answ, (int __user *)arg); case SIOCPNADDRESOURCE: case SIOCPNDELRESOURCE: { u32 res; if (get_user(res, (u32 __user *)arg)) return -EFAULT; if (res >= 256) return -EINVAL; if (cmd == SIOCPNADDRESOURCE) return pn_sock_bind_res(sk, res); else return pn_sock_unbind_res(sk, res); } } return -ENOIOCTLCMD; } /* Destroy socket. All references are gone. */ static void pn_destruct(struct sock *sk) { skb_queue_purge(&sk->sk_receive_queue); } static int pn_init(struct sock *sk) { sk->sk_destruct = pn_destruct; return 0; } static int pn_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) { DECLARE_SOCKADDR(struct sockaddr_pn *, target, msg->msg_name); struct sk_buff *skb; int err; if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_NOSIGNAL| MSG_CMSG_COMPAT)) return -EOPNOTSUPP; if (target == NULL) return -EDESTADDRREQ; if (msg->msg_namelen < sizeof(struct sockaddr_pn)) return -EINVAL; if (target->spn_family != AF_PHONET) return -EAFNOSUPPORT; skb = sock_alloc_send_skb(sk, MAX_PHONET_HEADER + len, msg->msg_flags & MSG_DONTWAIT, &err); if (skb == NULL) return err; skb_reserve(skb, MAX_PHONET_HEADER); err = memcpy_from_msg((void *)skb_put(skb, len), msg, len); if (err < 0) { kfree_skb(skb); return err; } /* * Fill in the Phonet header and * finally pass the packet forwards. */ err = pn_skb_send(sk, skb, target); /* If ok, return len. */ return (err >= 0) ? len : err; } static int pn_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int noblock, int flags, int *addr_len) { struct sk_buff *skb = NULL; struct sockaddr_pn sa; int rval = -EOPNOTSUPP; int copylen; if (flags & ~(MSG_PEEK|MSG_TRUNC|MSG_DONTWAIT|MSG_NOSIGNAL| MSG_CMSG_COMPAT)) goto out_nofree; skb = skb_recv_datagram(sk, flags, noblock, &rval); if (skb == NULL) goto out_nofree; pn_skb_get_src_sockaddr(skb, &sa); copylen = skb->len; if (len < copylen) { msg->msg_flags |= MSG_TRUNC; copylen = len; } rval = skb_copy_datagram_msg(skb, 0, msg, copylen); if (rval) { rval = -EFAULT; goto out; } rval = (flags & MSG_TRUNC) ? skb->len : copylen; if (msg->msg_name != NULL) { __sockaddr_check_size(sizeof(sa)); memcpy(msg->msg_name, &sa, sizeof(sa)); *addr_len = sizeof(sa); } out: skb_free_datagram(sk, skb); out_nofree: return rval; } /* Queue an skb for a sock. */ static int pn_backlog_rcv(struct sock *sk, struct sk_buff *skb) { int err = sock_queue_rcv_skb(sk, skb); if (err < 0) kfree_skb(skb); return err ? NET_RX_DROP : NET_RX_SUCCESS; } /* Module registration */ static struct proto pn_proto = { .close = pn_sock_close, .ioctl = pn_ioctl, .init = pn_init, .sendmsg = pn_sendmsg, .recvmsg = pn_recvmsg, .backlog_rcv = pn_backlog_rcv, .hash = pn_sock_hash, .unhash = pn_sock_unhash, .get_port = pn_sock_get_port, .obj_size = sizeof(struct pn_sock), .owner = THIS_MODULE, .name = "PHONET", }; static struct phonet_protocol pn_dgram_proto = { .ops = &phonet_dgram_ops, .prot = &pn_proto, .sock_type = SOCK_DGRAM, }; int __init isi_register(void) { return phonet_proto_register(PN_PROTO_PHONET, &pn_dgram_proto); } void __exit isi_unregister(void) { phonet_proto_unregister(PN_PROTO_PHONET, &pn_dgram_proto); } put type='submit' value='reload'/>
authorChristoph Hellwig <hch@lst.de>2017-01-30 13:15:41 +0100
committerBjorn Helgaas <bhelgaas@google.com>2017-02-02 10:35:46 -0600
commitdfef358bd1beb4e7b5c94eca944be9cd23dfc752 (patch)
treeb9a2afb38a4c2ac8ad31f49ec0d71fe9e5b1994c /net/appletalk/dev.c
parent030305d69fc6963c16003f50d7e8d74b02d0a143 (diff)
PCI/MSI: Don't apply affinity if there aren't enough vectors left
Bart reported a problem wіth an out of bounds access in the low-level IRQ affinity code, which we root caused to the qla2xxx driver assigning all its MSI-X vectors to the pre and post vectors, and not having any left for the actually spread IRQs. Fix this issue by not asking for affinity assignment when there are no vectors to assign left. Fixes: 402723ad5c62 ("PCI/MSI: Provide pci_alloc_irq_vectors_affinity()") Link: https://lkml.kernel.org/r/1485359225.3093.3.camel@sandisk.com Reported-by: Bart Van Assche <bart.vanassche@sandisk.com> Tested-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'net/appletalk/dev.c')