Commit Graph

69 Commits

Author SHA1 Message Date
Linus Torvalds 1827adb11a Merge branch 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull sched.h split-up from Ingo Molnar:
 "The point of these changes is to significantly reduce the
  <linux/sched.h> header footprint, to speed up the kernel build and to
  have a cleaner header structure.

  After these changes the new <linux/sched.h>'s typical preprocessed
  size goes down from a previous ~0.68 MB (~22K lines) to ~0.45 MB (~15K
  lines), which is around 40% faster to build on typical configs.

  Not much changed from the last version (-v2) posted three weeks ago: I
  eliminated quirks, backmerged fixes plus I rebased it to an upstream
  SHA1 from yesterday that includes most changes queued up in -next plus
  all sched.h changes that were pending from Andrew.

  I've re-tested the series both on x86 and on cross-arch defconfigs,
  and did a bisectability test at a number of random points.

  I tried to test as many build configurations as possible, but some
  build breakage is probably still left - but it should be mostly
  limited to architectures that have no cross-compiler binaries
  available on kernel.org, and non-default configurations"

* 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (146 commits)
  sched/headers: Clean up <linux/sched.h>
  sched/headers: Remove #ifdefs from <linux/sched.h>
  sched/headers: Remove the <linux/topology.h> include from <linux/sched.h>
  sched/headers, hrtimer: Remove the <linux/wait.h> include from <linux/hrtimer.h>
  sched/headers, x86/apic: Remove the <linux/pm.h> header inclusion from <asm/apic.h>
  sched/headers, timers: Remove the <linux/sysctl.h> include from <linux/timer.h>
  sched/headers: Remove <linux/magic.h> from <linux/sched/task_stack.h>
  sched/headers: Remove <linux/sched.h> from <linux/sched/init.h>
  sched/core: Remove unused prefetch_stack()
  sched/headers: Remove <linux/rculist.h> from <linux/sched.h>
  sched/headers: Remove the 'init_pid_ns' prototype from <linux/sched.h>
  sched/headers: Remove <linux/signal.h> from <linux/sched.h>
  sched/headers: Remove <linux/rwsem.h> from <linux/sched.h>
  sched/headers: Remove the runqueue_is_locked() prototype
  sched/headers: Remove <linux/sched.h> from <linux/sched/hotplug.h>
  sched/headers: Remove <linux/sched.h> from <linux/sched/debug.h>
  sched/headers: Remove <linux/sched.h> from <linux/sched/nohz.h>
  sched/headers: Remove <linux/sched.h> from <linux/sched/stat.h>
  sched/headers: Remove the <linux/gfp.h> include from <linux/sched.h>
  sched/headers: Remove <linux/rtmutex.h> from <linux/sched.h>
  ...
2017-03-03 10:16:38 -08:00
Ingo Molnar 174cd4b1e5 sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>
Fix up affected files that include this signal functionality via sched.h.

Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-03-02 08:42:32 +01:00
Christoph Hellwig fb5e31d970 virtio: allow drivers to request IRQ affinity when creating VQs
Add a struct irq_affinity pointer to the find_vqs methods, which if set
is used to tell the PCI layer to create the MSI-X vectors for our I/O
virtqueues with the proper affinity from the start.  Compared to after
the fact affinity hints this gives us an instantly working setup and
allows to allocate the irq descritors node-local and avoid interconnect
traffic.  Last but not least this will allow blk-mq queues are created
based on the interrupt affinity for storage drivers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2017-02-27 20:54:04 +02:00
Linus Torvalds 52f40e9d65 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes and cleanups from David Miller:

 1) Revert bogus nla_ok() change, from Alexey Dobriyan.

 2) Various bpf validator fixes from Daniel Borkmann.

 3) Add some necessary SET_NETDEV_DEV() calls to hsis_femac and hip04
    drivers, from Dongpo Li.

 4) Several ethtool ksettings conversions from Philippe Reynes.

 5) Fix bugs in inet port management wrt. soreuseport, from Tom Herbert.

 6) XDP support for virtio_net, from John Fastabend.

 7) Fix NAT handling within a vrf, from David Ahern.

 8) Endianness fixes in dpaa_eth driver, from Claudiu Manoil

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (63 commits)
  net: mv643xx_eth: fix build failure
  isdn: Constify some function parameters
  mlxsw: spectrum: Mark split ports as such
  cgroup: Fix CGROUP_BPF config
  qed: fix old-style function definition
  net: ipv6: check route protocol when deleting routes
  r6040: move spinlock in r6040_close as SOFTIRQ-unsafe lock order detected
  irda: w83977af_ir: cleanup an indent issue
  net: sfc: use new api ethtool_{get|set}_link_ksettings
  net: davicom: dm9000: use new api ethtool_{get|set}_link_ksettings
  net: cirrus: ep93xx: use new api ethtool_{get|set}_link_ksettings
  net: chelsio: cxgb3: use new api ethtool_{get|set}_link_ksettings
  net: chelsio: cxgb2: use new api ethtool_{get|set}_link_ksettings
  bpf: fix mark_reg_unknown_value for spilled regs on map value marking
  bpf: fix overflow in prog accounting
  bpf: dynamically allocate digest scratch buffer
  gtp: Fix initialization of Flags octet in GTPv1 header
  gtp: gtp_check_src_ms_ipv4() always return success
  net/x25: use designated initializers
  isdn: use designated initializers
  ...
2016-12-17 20:17:04 -08:00
Kees Cook 99a5e178bd ATM: use designated initializers
Prepare to mark sensitive kernel structures for randomization by making
sure they're using designated initializers. These were identified during
allyesconfig builds of x86, arm, and arm64, with most initializer fixes
extracted from grsecurity.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-17 11:56:57 -05:00
Michael S. Tsirkin f83f12d660 vsock/virtio: fix src/dst cid format
These fields are 64 bit, using le32_to_cpu and friends
on these will not do the right thing.
Fix this up.

Cc: stable@vger.kernel.org
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-12-15 06:59:19 +02:00
Michael S. Tsirkin 819483d806 vsock/virtio: mark an internal function static
virtio_transport_alloc_pkt is only used locally, make it static.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-12-15 06:59:19 +02:00
Michael S. Tsirkin 6c7efafdd5 vsock/virtio: add a missing __le annotation
guest cid is read from config space, therefore it's in little endian
format and is treated as such, annotate it accordingly.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-12-15 06:59:18 +02:00
Stefan Hajnoczi b911682318 VSOCK: add loopback to virtio_transport
The VMware VMCI transport supports loopback inside virtual machines.
This patch implements loopback for virtio-vsock.

Flow control is handled by the virtio-vsock protocol as usual.  The
sending process stops transmitting on a connection when the peer's
receive buffer space is exhausted.

Cathy Avery <cavery@redhat.com> noticed this difference between VMCI and
virtio-vsock when a test case using loopback failed.  Although loopback
isn't the main point of AF_VSOCK, it is useful for testing and
virtio-vsock must match VMCI semantics so that userspace programs run
regardless of the underlying transport.

My understanding is that loopback is not supported on the host side with
VMCI.  Follow that by implementing it only in the guest driver, not the
vhost host driver.

Cc: Jorgen Hansen <jhansen@vmware.com>
Reported-by: Cathy Avery <cavery@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-11-24 11:53:15 -05:00
WANG Cong d9dc8b0f8b net: fix sleeping for sk_wait_event()
Similar to commit 14135f30e3 ("inet: fix sleeping inside inet_wait_for_connect()"),
sk_wait_event() needs to fix too, because release_sock() is blocking,
it changes the process state back to running after sleep, which breaks
the previous prepare_to_wait().

Switch to the new wait API.

Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-11-14 13:17:21 -05:00
Jorgen Hansen 1190cfdb1a VSOCK: Don't dec ack backlog twice for rejected connections
If a pending socket is marked as rejected, we will decrease the
sk_ack_backlog twice. So don't decrement it for rejected sockets
in vsock_pending_work().

Testing of the rejected socket path was done through code
modifications.

Reported-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Jorgen Hansen <jhansen@vmware.com>
Reviewed-by: Adit Ranadive <aditr@vmware.com>
Reviewed-by: Aditya Sarwade <asarwade@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-09-27 07:59:25 -04:00
Gerard Garcia 21bc54fc0c vhost/vsock: drop space available check for TX vq
Remove unnecessary use of enable/disable callback notifications
and the incorrect more space available check.

The virtio_transport_tx_work handles when the TX virtqueue
has more buffers available.

Signed-off-by: Gerard Garcia <ggarcia@deic.uab.cat>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-08-15 05:05:21 +03:00
Asias He 304ba62fd4 VSOCK: Add Makefile and Kconfig
Enable virtio-vsock and vhost-vsock.

Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-08-02 02:57:30 +03:00
Asias He 0ea9e1d3a9 VSOCK: Introduce virtio_transport.ko
VM sockets virtio transport implementation.  This driver runs in the
guest.

Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-08-02 02:57:29 +03:00
Asias He 06a8fc7836 VSOCK: Introduce virtio_vsock_common.ko
This module contains the common code and header files for the following
virtio_transporto and vhost_vsock kernel modules.

Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-08-02 02:57:29 +03:00
Stefan Hajnoczi 6773b7dc39 VSOCK: defer sock removal to transports
The virtio transport will implement graceful shutdown and the related
SO_LINGER socket option.  This requires orphaning the sock but keeping
it in the table of connections after .release().

This patch adds the vsock_remove_sock() function and leaves it up to the
transport when to remove the sock.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-08-02 02:57:28 +03:00
Stefan Hajnoczi 0b01aeb3d2 VSOCK: transport-specific vsock_transport functions
struct vsock_transport contains function pointers called by AF_VSOCK
core code.  The transport may want its own transport-specific function
pointers and they can be added after struct vsock_transport.

Allow the transport to fetch vsock_transport.  It can downcast it to
access transport-specific function pointers.

The virtio transport will use this.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-08-02 02:57:28 +03:00
Stefan Hajnoczi 4192f672fa vsock: make listener child lock ordering explicit
There are several places where the listener and pending or accept queue
child sockets are accessed at the same time.  Lockdep is unhappy that
two locks from the same class are held.

Tell lockdep that it is safe and document the lock ordering.

Originally Claudio Imbrenda <imbrenda@linux.vnet.ibm.com> sent a similar
patch asking whether this is safe.  I have audited the code and also
covered the vsock_pending_work() function.

Suggested-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-06-27 10:44:46 -04:00
David S. Miller e800072c18 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
In netdevice.h we removed the structure in net-next that is being
changes in 'net'.  In macsec.c and rtnetlink.c we have overlaps
between fixes in 'net' and the u64 attribute changes in 'net-next'.

The mlx5 conflicts have to do with vxlan support dependencies.

Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-09 15:59:24 -04:00
Ian Campbell dedc58e067 VSOCK: do not disconnect socket when peer has shutdown SEND only
The peer may be expecting a reply having sent a request and then done a
shutdown(SHUT_WR), so tearing down the whole socket at this point seems
wrong and breaks for me with a client which does a SHUT_WR.

Looking at other socket family's stream_recvmsg callbacks doing a shutdown
here does not seem to be the norm and removing it does not seem to have
had any adverse effects that I can see.

I'm using Stefan's RFC virtio transport patches, I'm unsure of the impact
on the vmci transport.

Signed-off-by: Ian Campbell <ian.campbell@docker.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Cc: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
Cc: Andy King <acking@vmware.com>
Cc: Dmitry Torokhov <dtor@vmware.com>
Cc: Jorgen Hansen <jhansen@vmware.com>
Cc: Adit Ranadive <aditr@vmware.com>
Cc: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-05 23:31:29 -04:00
Julia Lawall 56130915bb VSOCK: constify vsock_transport structure
The vsock_transport structure is never modified, so declare it as const.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-03 13:03:05 -04:00
Jorgen Hansen 9c995cc9a2 VSOCK: Only check error on skb_recv_datagram when skb is NULL
If skb_recv_datagram returns an skb, we should ignore the err
value returned. Otherwise, datagram receives will return EAGAIN
when they have to wait for a datagram.

Acked-by: Adit Ranadive <aditr@vmware.com>
Signed-off-by: Jorgen Hansen <jhansen@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-19 20:42:01 -04:00
Jorgen Hansen 8ab18d71de VSOCK: Detach QP check should filter out non matching QPs.
The check in vmci_transport_peer_detach_cb should only allow a
detach when the qp handle of the transport matches the one in
the detach message.

Testing: Before this change, a detach from a peer on a different
socket would cause an active stream socket to register a detach.

Reviewed-by: George Zhang <georgezhang@vmware.com>
Signed-off-by: Jorgen Hansen <jhansen@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-06 16:39:09 -04:00
Claudio Imbrenda f7f9b5e7f8 AF_VSOCK: Shrink the area influenced by prepare_to_wait
When a thread is prepared for waiting by calling prepare_to_wait, sleeping
is not allowed until either the wait has taken place or finish_wait has
been called.  The existing code in af_vsock imposed unnecessary no-sleep
assumptions to a broad list of backend functions.
This patch shrinks the influence of prepare_to_wait to the area where it
is strictly needed, therefore relaxing the no-sleep restriction there.

Signed-off-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-22 16:18:41 -04:00
Claudio Imbrenda 6f57e56a15 Revert "vsock: Fix blocking ops call in prepare_to_wait"
This reverts commit 5988818008 ("vsock: Fix
blocking ops call in prepare_to_wait")

The commit reverted with this patch caused us to potentially miss wakeups.
Since the condition is not checked between the prepare_to_wait and the
schedule(), if a wakeup happens after the condition is checked but before
the sleep happens, we will miss it. ( A description of the problem can be
found here: http://www.makelinux.net/ldd3/chp-6-sect-2 ).

By reverting the patch, the behaviour is still incorrect (since we
shouldn't sleep between the prepare_to_wait and the schedule) but at least
it will not miss wakeups.

The next patch in the series actually fixes the behaviour.

Signed-off-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-22 16:18:41 -04:00
Laura Abbott 5988818008 vsock: Fix blocking ops call in prepare_to_wait
We receoved a bug report from someone using vmware:

WARNING: CPU: 3 PID: 660 at kernel/sched/core.c:7389
__might_sleep+0x7d/0x90()
do not call blocking ops when !TASK_RUNNING; state=1 set at
[<ffffffff810fa68d>] prepare_to_wait+0x2d/0x90
Modules linked in: vmw_vsock_vmci_transport vsock snd_seq_midi
snd_seq_midi_event snd_ens1371 iosf_mbi gameport snd_rawmidi
snd_ac97_codec ac97_bus snd_seq coretemp snd_seq_device snd_pcm
snd_timer snd soundcore ppdev crct10dif_pclmul crc32_pclmul
ghash_clmulni_intel vmw_vmci vmw_balloon i2c_piix4 shpchp parport_pc
parport acpi_cpufreq nfsd auth_rpcgss nfs_acl lockd grace sunrpc btrfs
xor raid6_pq 8021q garp stp llc mrp crc32c_intel serio_raw mptspi vmwgfx
drm_kms_helper ttm drm scsi_transport_spi mptscsih e1000 ata_generic
mptbase pata_acpi
CPU: 3 PID: 660 Comm: vmtoolsd Not tainted
4.2.0-0.rc1.git3.1.fc23.x86_64 #1
Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop
Reference Platform, BIOS 6.00 05/20/2014
 0000000000000000 0000000049e617f3 ffff88006ac37ac8 ffffffff818641f5
 0000000000000000 ffff88006ac37b20 ffff88006ac37b08 ffffffff810ab446
 ffff880068009f40 ffffffff81c63bc0 0000000000000061 0000000000000000
Call Trace:
 [<ffffffff818641f5>] dump_stack+0x4c/0x65
 [<ffffffff810ab446>] warn_slowpath_common+0x86/0xc0
 [<ffffffff810ab4d5>] warn_slowpath_fmt+0x55/0x70
 [<ffffffff8112551d>] ? debug_lockdep_rcu_enabled+0x1d/0x20
 [<ffffffff810fa68d>] ? prepare_to_wait+0x2d/0x90
 [<ffffffff810fa68d>] ? prepare_to_wait+0x2d/0x90
 [<ffffffff810da2bd>] __might_sleep+0x7d/0x90
 [<ffffffff812163b3>] __might_fault+0x43/0xa0
 [<ffffffff81430477>] copy_from_iter+0x87/0x2a0
 [<ffffffffa039460a>] __qp_memcpy_to_queue+0x9a/0x1b0 [vmw_vmci]
 [<ffffffffa0394740>] ? qp_memcpy_to_queue+0x20/0x20 [vmw_vmci]
 [<ffffffffa0394757>] qp_memcpy_to_queue_iov+0x17/0x20 [vmw_vmci]
 [<ffffffffa0394d50>] qp_enqueue_locked+0xa0/0x140 [vmw_vmci]
 [<ffffffffa039593f>] vmci_qpair_enquev+0x4f/0xd0 [vmw_vmci]
 [<ffffffffa04847bb>] vmci_transport_stream_enqueue+0x1b/0x20
[vmw_vsock_vmci_transport]
 [<ffffffffa047ae05>] vsock_stream_sendmsg+0x2c5/0x320 [vsock]
 [<ffffffff810fabd0>] ? wake_atomic_t_function+0x70/0x70
 [<ffffffff81702af8>] sock_sendmsg+0x38/0x50
 [<ffffffff81702ff4>] SYSC_sendto+0x104/0x190
 [<ffffffff8126e25a>] ? vfs_read+0x8a/0x140
 [<ffffffff817042ee>] SyS_sendto+0xe/0x10
 [<ffffffff8186d9ae>] entry_SYSCALL_64_fastpath+0x12/0x76

transport->stream_enqueue may call copy_to_user so it should
not be called inside a prepare_to_wait. Narrow the scope of
the prepare_to_wait to avoid the bad call. This also applies
to vsock_stream_recvmsg as well.

Reported-by: Vinson Lee <vlee@freedesktop.org>
Tested-by: Vinson Lee <vlee@freedesktop.org>
Signed-off-by: Laura Abbott <labbott@fedoraproject.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-13 05:57:39 -05:00
Stefan Hajnoczi 8ac2837c89 Revert "Merge branch 'vsock-virtio'"
This reverts commit 0d76d6e8b2 and merge
commit c402293bd7, reversing changes made
to c89359a42e.

The virtio-vsock device specification is not finalized yet.  Michael
Tsirkin voiced concerned about merging this code when the hardware
interface (and possibly the userspace interface) could still change.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-08 21:55:49 -05:00
Asias He 8a2a202989 VSOCK: Add Makefile and Kconfig
Enable virtio-vsock and vhost-vsock.

Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03 15:05:55 -05:00
Asias He 32e61b06b6 VSOCK: Introduce virtio-vsock.ko
VM sockets virtio transport implementation. This module runs in guest
kernel.

Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03 15:05:55 -05:00
Asias He 80a19e338d VSOCK: Introduce virtio-vsock-common.ko
This module contains the common code and header files for the following
virtio-vsock and virtio-vhost kernel modules.

Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03 15:05:55 -05:00
Asias He 357ab2234d VSOCK: Introduce vsock_find_unbound_socket and vsock_bind_dgram_generic
Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03 15:05:54 -05:00
Julia Lawall 3b22dae38d VSOCK: constify vmci_transport_notify_ops structures
The vmci_transport_notify_ops structures are never modified, so declare
them as const.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-23 15:49:29 -05:00
Stefan Hajnoczi 7362945aea VSOCK: call sk->sk_data_ready() on accept()
When a listen socket enqueues a connection for userspace to accept(),
the sk->sk_data_ready() callback should be invoked.  In-kernel socket
users rely on this callback to detect when incoming connections are
available.

Currently the sk->sk_state_change() callback is invoked by
vmci_transport.c.  This happens to work for userspace applications since
sk->sk_state_change = sock_def_wakeup() and sk->sk_data_ready =
sock_def_readable() both wake up the accept() waiter.  In-kernel socket
users, on the other hand, fail to detect incoming connections.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-04 22:03:10 -05:00
Stefan Hajnoczi ea3803c193 VSOCK: define VSOCK_SS_LISTEN once only
The SS_LISTEN socket state is defined by both af_vsock.c and
vmci_transport.c.  This is risky since the value could be changed in one
file and the other would be out of sync.

Rename from SS_LISTEN to VSOCK_SS_LISTEN since the constant is not part
of enum socket_state (SS_CONNECTED, ...).  This way it is clear that the
constant is vsock-specific.

The big text reflow in af_vsock.c was necessary to keep to the maximum
line length.  Text is unchanged except for s/SS_LISTEN/VSOCK_SS_LISTEN/.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-01 12:14:47 -05:00
Jorgen Hansen 8566b86ab9 VSOCK: Fix lockdep issue.
The recent fix for the vsock sock_put issue used the wrong
initializer for the transport spin_lock causing an issue when
running with lockdep checking.

Testing: Verified fix on kernel with lockdep enabled.

Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Jorgen Hansen <jhansen@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-22 18:26:29 -07:00
Jorgen Hansen 4ef7ea9195 VSOCK: sock_put wasn't safe to call in interrupt context
In the vsock vmci_transport driver, sock_put wasn't safe to call
in interrupt context, since that may call the vsock destructor
which in turn calls several functions that should only be called
from process context. This change defers the callling of these
functions  to a worker thread. All these functions were
deallocation of resources related to the transport itself.

Furthermore, an unused callback was removed to simplify the
cleanup.

Multiple customers have been hitting this issue when using
VMware tools on vSphere 2015.

Also added a version to the vmci transport module (starting from
1.0.2.0-k since up until now it appears that this module was
sharing version with vsock that is currently at 1.0.1.0-k).

Reviewed-by: Aditya Asarwade <asarwade@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Jorgen Hansen <jhansen@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-22 07:21:05 -07:00
Gao feng f6a835bb04 vsock: fix missing cleanup when misc_register failed
reset transport and unlock if misc_register failed.

Signed-off-by: Gao feng <omarapazanadi@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-21 07:41:06 -07:00
Eric W. Biederman 11aa9c28b4 net: Pass kern from net_proto_family.create to sk_alloc
In preparation for changing how struct net is refcounted
on kernel sockets pass the knowledge that we are creating
a kernel socket from sock_create_kern through to sk_alloc.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-11 10:50:17 -04:00
Ying Xue 1b78414047 net: Remove iocb argument from sendmsg and recvmsg
After TIPC doesn't depend on iocb argument in its internal
implementations of sendmsg() and recvmsg() hooks defined in proto
structure, no any user is using iocb argument in them at all now.
Then we can drop the redundant iocb argument completely from kinds of
implementations of both sendmsg() and recvmsg() in the entire
networking stack.

Cc: Christoph Hellwig <hch@lst.de>
Suggested-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-02 13:06:31 -05:00
Al Viro 4c946d9c11 vmci: propagate msghdr all way down to __qp_memcpy_to_queue()
Switch from passing msg->iov_iter.iov to passing msg itself

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-02-04 01:34:14 -05:00
Al Viro c0371da604 put iov_iter into msghdr
Note that the code _using_ ->msg_iter at that point will be very
unhappy with anything other than unshifted iovec-backed iov_iter.
We still need to convert users to proper primitives.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-12-09 16:29:03 -05:00
Al Viro d838df2e5d vmci: propagate msghdr all way down to __qp_memcpy_from_queue()
... and switch it to memcpy_to_msg()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-12-09 16:28:23 -05:00
Al Viro 0f7db23a07 vmci_transport: switch ->enqeue_dgram, ->enqueue_stream and ->dequeue_stream to msghdr
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-11-24 05:16:42 -05:00
David S. Miller 51f3d02b98 net: Add and use skb_copy_datagram_msg() helper.
This encapsulates all of the skb_copy_datagram_iovec() callers
with call argument signature "skb, offset, msghdr->msg_iov, length".

When we move to iov_iters in the networking, the iov_iter object will
sit in the msghdr.

Having a helper like this means there will be less places to touch
during that transformation.

Based upon descriptions and patch from Al Viro.

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-05 16:46:40 -05:00
Andy King 2c4a336e0a vsock: Make transport the proto owner
Right now the core vsock module is the owner of the proto family. This
means there's nothing preventing the transport module from unloading if
there are open sockets, which results in a panic. Fix that by allowing
the transport to be the owner, which will refcount it properly.

Includes version bump to 1.0.1.0-k

Passes checkpatch this time, I swear...

Acked-by: Dmitry Torokhov <dtor@vmware.com>
Signed-off-by: Andy King <acking@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-05-05 13:13:50 -04:00
David S. Miller 676d23690f net: Fix use after free by removing length arg from sk_data_ready callbacks.
Several spots in the kernel perform a sequence like:

	skb_queue_tail(&sk->s_receive_queue, skb);
	sk->sk_data_ready(sk, skb->len);

But at the moment we place the SKB onto the socket receive queue it
can be consumed and freed up.  So this skb->len access is potentially
to freed up memory.

Furthermore, the skb->len can be modified by the consumer so it is
possible that the value isn't accurate.

And finally, no actual implementation of this callback actually uses
the length argument.  And since nobody actually cared about it's
value, lots of call sites pass arbitrary values in such as '0' and
even '1'.

So just remove the length argument from the callback, that way there
is no confusion whatsoever and all of these use-after-free cases get
fixed as a side effect.

Based upon a patch by Eric Dumazet and his suggestion to audit this
issue tree-wide.

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-11 16:15:36 -04:00
Steffen Hurrle 342dfc306f net: add build-time checks for msg->msg_name size
This is a follow-up patch to f3d3342602 ("net: rework recvmsg
handler msg_name and msg_namelen logic").

DECLARE_SOCKADDR validates that the structure we use for writing the
name information to is not larger than the buffer which is reserved
for msg->msg_name (which is 128 bytes). Also use DECLARE_SOCKADDR
consistently in sendmsg code paths.

Signed-off-by: Steffen Hurrle <steffen@hurrle.net>
Suggested-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-18 23:04:16 -08:00
Hannes Frederic Sowa f3d3342602 net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.

This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.

Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.

Also document these changes in include/linux/net.h as suggested by David
Miller.

Changes since RFC:

Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.

With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
	msg->msg_name = NULL
".

This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.

Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.

Cc: David Miller <davem@davemloft.net>
Suggested-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-20 21:52:30 -05:00
Masanari Iida 8c88126bbb treewide: Fix typo in Kconfig
Correct spelling typo in Kconfig.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-10-14 15:23:02 +02:00
David S. Miller 2ff1cf12c9 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-08-16 15:37:26 -07:00