History log of /openbmc/linux/net/tipc/msg.h (Results 251 – 275 of 888)
Revision (<<< Hide revision tags) (Show revision tags >>>) Date Author Comments
# cf40a76e 28-Nov-2017 James Morris <james.l.morris@oracle.com>

Merge tag 'v4.15-rc1' into next-seccomp

Linux 4.15-rc1


# 69830d39 28-Nov-2017 Mark Brown <broonie@kernel.org>

Merge branch 'topic/disconnect' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into asoc-rcar


# bc686442 28-Nov-2017 Tony Lindgren <tony@atomide.com>

Merge branch 'dts-fixes' into omap-for-v4.15/fixes-dt


# 2db57789 28-Nov-2017 Tony Lindgren <tony@atomide.com>

Merge branch 'soc-fixes' into omap-for-v4.15/fixes


# 088fecfb 27-Nov-2017 Mauro Carvalho Chehab <mchehab@s-opensource.com>

Merge tag 'v4.15-rc1' into patchwork

Linux 4.15-rc1

* tag 'v4.15-rc1': (12179 commits)
Linux 4.15-rc1
ARM: BUG if jumping to usermode address in kernel mode
m68k/macboing: Fix missed timer ca

Merge tag 'v4.15-rc1' into patchwork

Linux 4.15-rc1

* tag 'v4.15-rc1': (12179 commits)
Linux 4.15-rc1
ARM: BUG if jumping to usermode address in kernel mode
m68k/macboing: Fix missed timer callback assignment
afs: remove redundant assignment of dvnode to itself
afs: cell: Remove unnecessary code in afs_lookup_cell
afs: Fix signal handling in some file ops
afs: Fix some dentry handling in dir ops and missing key_puts
afs: Make afs_write_begin() avoid writing to a page that's being stored
sched/debug: Fix task state recording/printout
x86/decoder: Add new TEST instruction pattern
x86/PCI: Remove unused HyperTransport interrupt support
x86/umip: Fix insn_get_code_seg_params()'s return value
x86/boot/KASLR: Remove unused variable
genirq/matrix: Make - vs ?: Precedence explicit
irqchip/imgpdc: Use resource_size function on resource object
irqchip/qcom: Fix u32 comparison with value less than zero
ipvlan: Fix insufficient skb linear check for ipv6 icmp
ipvlan: Fix insufficient skb linear check for arp
geneve: only configure or fill UDP_ZERO_CSUM6_RX/TX info when CONFIG_IPV6
net: dsa: bcm_sf2: Clear IDDQ_GLOBAL_PWR bit for PHY
...

show more ...


# 1420edf7 27-Nov-2017 Daniel Vetter <daniel.vetter@ffwll.ch>

Merge tag 'v4.15-rc1' into drm-misc-fixes

Linux 4.15-rc1

Pull in the merge window to resync. Dave didn't get his -fixes pull
landed in time, and now there's another rockchip fix pending, so
fast-fo

Merge tag 'v4.15-rc1' into drm-misc-fixes

Linux 4.15-rc1

Pull in the merge window to resync. Dave didn't get his -fixes pull
landed in time, and now there's another rockchip fix pending, so
fast-forwarding isn't possible, hence backmerge.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

show more ...


Revision tags: v4.13.16
# 866c9b94 23-Nov-2017 Thomas Gleixner <tglx@linutronix.de>

Merge tag 'for-linus-timers-conversion-final-v4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux into timers/urgent

Pull the last batch of manual timer conversions from Kees Cook:

Merge tag 'for-linus-timers-conversion-final-v4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux into timers/urgent

Pull the last batch of manual timer conversions from Kees Cook:

- final batch of "non trivial" timer conversions (multi-tree dependencies,
things Coccinelle couldn't handle, etc).

- treewide conversions via Coccinelle, in 4 steps:
- DEFINE_TIMER() functions converted to struct timer_list * argument
- init_timer() -> setup_timer()
- setup_timer() -> timer_setup()
- setup_timer() -> timer_setup() (with a single embedded structure)

- deprecated timer API removals (init_timer(), setup_*timer())

- finalization of new API (remove global casts)

show more ...


# 81700247 17-Nov-2017 Linus Torvalds <torvalds@linux-foundation.org>

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Pull networking fixes from David Miller:

1) Revert regression inducing change to the IPSEC template resolver,
from Steffen Klasser

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Pull networking fixes from David Miller:

1) Revert regression inducing change to the IPSEC template resolver,
from Steffen Klassert.

2) Peeloffs can cause the wrong sk to be waken up in SCTP, fix from Xin
Long.

3) Min packet MTU size is wrong in cpsw driver, from Grygorii Strashko.

4) Fix build failure in netfilter ctnetlink, from Arnd Bergmann.

5) ISDN hisax driver checks pnp_irq() for errors incorrectly, from
Arvind Yadav.

6) Fix fealnx driver build failure on MIPS, from Huacai Chen.

7) Fix into leak in SCTP, the scope_id of socket addresses is not
always filled in. From Eric W. Biederman.

8) MTU inheritance between physical function and representor fix in nfp
driver, from Dirk van der Merwe.

9) Fix memory leak in rsi driver, from Colin Ian King.

10) Fix expiration and generation ID handling of cached ipv4 redirect
routes, from Xin Long.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (40 commits)
net: usb: hso.c: remove unneeded DRIVER_LICENSE #define
ibmvnic: fix dma_mapping_error call
ipvlan: NULL pointer dereference panic in ipvlan_port_destroy
route: also update fnhe_genid when updating a route cache
route: update fnhe_expires for redirect when the fnhe exists
sctp: set frag_point in sctp_setsockopt_maxseg correctly
rsi: fix memory leak on buf and usb_reg_buf
net/netlabel: Add list_next_rcu() in rcu_dereference().
nfp: remove false positive offloads in flower vxlan
nfp: register flower reprs for egress dev offload
nfp: inherit the max_mtu from the PF netdev
nfp: fix vlan receive MAC statistics typo
nfp: fix flower offload metadata flag usage
virto_net: remove empty file 'virtio_net.'
net/sctp: Always set scope_id in sctp_inet6_skb_msgname
fealnx: Fix building error on MIPS
isdn: hisax: Fix pnp_irq's error checking for setup_teles3
isdn: hisax: Fix pnp_irq's error checking for setup_sedlbauer_isapnp
isdn: hisax: Fix pnp_irq's error checking for setup_niccy
isdn: hisax: Fix pnp_irq's error checking for setup_ix1micro
...

show more ...


# d618d09a 15-Nov-2017 Jon Maloy <jon.maloy@ericsson.com>

tipc: enforce valid ratio between skb truesize and contents

The socket level flow control is based on the assumption that incoming
buffers meet the condition (skb->truesize / roundup(skb->len) <= 4)

tipc: enforce valid ratio between skb truesize and contents

The socket level flow control is based on the assumption that incoming
buffers meet the condition (skb->truesize / roundup(skb->len) <= 4),
where the latter value is rounded off upwards to the nearest 1k number.
This does empirically hold true for the device drivers we know, but we
cannot trust that it will always be so, e.g., in a system with jumbo
frames and very small packets.

We now introduce a check for this condition at packet arrival, and if
we find it to be false, we copy the packet to a new, smaller buffer,
where the condition will be true. We expect this to affect only a small
fraction of all incoming packets, if at all.

Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

show more ...


# 5bbcc0f5 15-Nov-2017 Linus Torvalds <torvalds@linux-foundation.org>

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:
"Highlights:

1) Maintain the TCP retransmit queue using an rbtree, with 1GB
w

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:
"Highlights:

1) Maintain the TCP retransmit queue using an rbtree, with 1GB
windows at 100Gb this really has become necessary. From Eric
Dumazet.

2) Multi-program support for cgroup+bpf, from Alexei Starovoitov.

3) Perform broadcast flooding in hardware in mv88e6xxx, from Andrew
Lunn.

4) Add meter action support to openvswitch, from Andy Zhou.

5) Add a data meta pointer for BPF accessible packets, from Daniel
Borkmann.

6) Namespace-ify almost all TCP sysctl knobs, from Eric Dumazet.

7) Turn on Broadcom Tags in b53 driver, from Florian Fainelli.

8) More work to move the RTNL mutex down, from Florian Westphal.

9) Add 'bpftool' utility, to help with bpf program introspection.
From Jakub Kicinski.

10) Add new 'cpumap' type for XDP_REDIRECT action, from Jesper
Dangaard Brouer.

11) Support 'blocks' of transformations in the packet scheduler which
can span multiple network devices, from Jiri Pirko.

12) TC flower offload support in cxgb4, from Kumar Sanghvi.

13) Priority based stream scheduler for SCTP, from Marcelo Ricardo
Leitner.

14) Thunderbolt networking driver, from Amir Levy and Mika Westerberg.

15) Add RED qdisc offloadability, and use it in mlxsw driver. From
Nogah Frankel.

16) eBPF based device controller for cgroup v2, from Roman Gushchin.

17) Add some fundamental tracepoints for TCP, from Song Liu.

18) Remove garbage collection from ipv6 route layer, this is a
significant accomplishment. From Wei Wang.

19) Add multicast route offload support to mlxsw, from Yotam Gigi"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (2177 commits)
tcp: highest_sack fix
geneve: fix fill_info when link down
bpf: fix lockdep splat
net: cdc_ncm: GetNtbFormat endian fix
openvswitch: meter: fix NULL pointer dereference in ovs_meter_cmd_reply_start
netem: remove unnecessary 64 bit modulus
netem: use 64 bit divide by rate
tcp: Namespace-ify sysctl_tcp_default_congestion_control
net: Protect iterations over net::fib_notifier_ops in fib_seq_sum()
ipv6: set all.accept_dad to 0 by default
uapi: fix linux/tls.h userspace compilation error
usbnet: ipheth: prevent TX queue timeouts when device not ready
vhost_net: conditionally enable tx polling
uapi: fix linux/rxrpc.h userspace compilation errors
net: stmmac: fix LPI transitioning for dwmac4
atm: horizon: Fix irq release error
net-sysfs: trigger netlink notification on ifalias change via sysfs
openvswitch: Using kfree_rcu() to simplify the code
openvswitch: Make local function ovs_nsh_key_attr_size() static
openvswitch: Fix return value check in ovs_meter_cmd_features()
...

show more ...


Revision tags: v4.14
# 8d6e79d3 08-Nov-2017 Jon Maloy <jon.maloy@ericsson.com>

tipc: improve link resiliency when rps is activated

Currently, the TIPC RPS dissector is based only on the incoming packets'
source node address, hence steering all traffic from a node to the same
c

tipc: improve link resiliency when rps is activated

Currently, the TIPC RPS dissector is based only on the incoming packets'
source node address, hence steering all traffic from a node to the same
core. We have seen that this makes the links vulnerable to starvation
and unnecessary resets when we turn down the link tolerance to very low
values.

To reduce the risk of this happening, we exempt probe and probe replies
packets from the convergence to one core per source node. Instead, we do
the opposite, - we try to diverge those packets across as many cores as
possible, by randomizing the flow selector key.

To make such packets identifiable to the dissector, we add a new
'is_keepalive' bit to word 0 of the LINK_PROTOCOL header. This bit is
set both for PROBE and PROBE_REPLY messages, and only for those.

It should be noted that these packets are not part of any flow anyway,
and only constitute a minuscule fraction of all packets sent across a
link. Hence, there is no risk that this will affect overall performance.

Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

show more ...


# 396665e8 18-Oct-2017 Stefan Schmidt <stefan@datenfreihafen.org>

Merge remote-tracking branch 'net-next/master'


# a00344bd 13-Oct-2017 David S. Miller <davem@davemloft.net>

Merge branch 'tipc-comm-groups'

Jon Maloy says:

====================
tipc: Introduce Communcation Group feature

With this commit series we introduce a 'Group Communication' feature in
order to res

Merge branch 'tipc-comm-groups'

Jon Maloy says:

====================
tipc: Introduce Communcation Group feature

With this commit series we introduce a 'Group Communication' feature in
order to resolve the datagram and multicast flow control problem. This
new feature makes it possible for a user to instantiate multiple private
virtual brokerless message buses by just creating and joining member
sockets.

The main features are as follows:
---------------------------------
- Sockets can join a group via a new setsockopt() call TIPC_GROUP_JOIN.
If it is the first socket of the group this implies creation of the
group. This call takes four parameters: 'type' serves as group
identifier, 'instance' serves as member identifier, and 'scope'
indicates the visibility of the group (node/cluster/zone). Finally,
'flags' indicates different options for the socket joining the group.
For the time being, there are only two such flags: 1) 'LOOPBACK'
indicates if the creator of the socket wants to receive a copy of
broadcast or multicast messages it sends to the group, 2) EVENTS
indicates if it wants to receive membership (JOINED/LEFT) events for
the other members of the group.

- Groups are closed, i.e., sockets which have not joined a group will
not be able to send messages to or receive messages from members of
the group, and vice versa. A socket can only be member of one group
at a time.

- There are four transmission modes.
1: Unicast. The sender transmits a message using the port identity
(node:port tuple) of the receiving socket.
2: Anycast. The sender transmits a message using a port name (type:
instance:scope) of one of the receiving sockets. If more than
one member socket matches the given address a destination is
selected according to a round-robin algorithm, but also considering
the destination load (advertised window size) as an additional
criteria.
3: Multicast. The sender transmits a message using a port name
(type:instance:scope) of one or more of the receiving sockets.
All sockets in the group matching the given address will receive
a copy of the message.
4: Broadcast. The sender transmits a message using the primtive
send(). All members of the group, irrespective of their member
identity (instance) number receive a copy of the message.

- TIPC broadcast is used for carrying messages in mode 3 or 4 when
this is deemed more efficient, i.e., depending on number of actual
destinations.

- All transmission modes are flow controlled, so that messages never
are dropped or rejected, just like we are used to from connection
oriented communication. A special algorithm guarantees that this is
true even for multipoint-to-point communication, i.e., at occasions
where many source sockets may decide to send simultaneously towards
the same destination socket.

- Sequence order is always guaranteed, even between the different
transmission modes.

- Member join/leave events are received in all other member sockets
in guaranteed order. I.e., a 'JOINED' (an empty message with the OOB
bit set) will always be received before the first data message from
a new member, and a 'LEAVE' (like 'JOINED', but with EOR bit set) will
always arrive after the last data message from a leaving member.

-----
v2: Reordered variable declarations in descending length order, as per
feedback from David Miller. This was done as far as permitted by the
the initialization order.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

show more ...


# 04d7b574 13-Oct-2017 Jon Maloy <jon.maloy@ericsson.com>

tipc: add multipoint-to-point flow control

We already have point-to-multipoint flow control within a group. But
we even need the opposite; -a scheme which can handle that potentially
hundreds of sou

tipc: add multipoint-to-point flow control

We already have point-to-multipoint flow control within a group. But
we even need the opposite; -a scheme which can handle that potentially
hundreds of sources may try to send messages to the same destination
simultaneously without causing buffer overflow at the recipient. This
commit adds such a mechanism.

The algorithm works as follows:

- When a member detects a new, joining member, it initially set its
state to JOINED and advertises a minimum window to the new member.
This window is chosen so that the new member can send exactly one
maximum sized message, or several smaller ones, to the recipient
before it must stop and wait for an additional advertisement. This
minimum window ADV_IDLE is set to 65 1kB blocks.

- When a member receives the first data message from a JOINED member,
it changes the state of the latter to ACTIVE, and advertises a larger
window ADV_ACTIVE = 12 x ADV_IDLE blocks to the sender, so it can
continue sending with minimal disturbances to the data flow.

- The active members are kept in a dedicated linked list. Each time a
message is received from an active member, it will be moved to the
tail of that list. This way, we keep a record of which members have
been most (tail) and least (head) recently active.

- There is a maximum number (16) of permitted simultaneous active
senders per receiver. When this limit is reached, the receiver will
not advertise anything immediately to a new sender, but instead put
it in a PENDING state, and add it to a corresponding queue. At the
same time, it will pick the least recently active member, send it an
advertisement RECLAIM message, and set this member to state
RECLAIMING.

- The reclaimee member has to respond with a REMIT message, meaning that
it goes back to a send window of ADV_IDLE, and returns its unused
advertised blocks beyond that value to the reclaiming member.

- When the reclaiming member receives the REMIT message, it unlinks
the reclaimee from its active list, resets its state to JOINED, and
notes that it is now back at ADV_IDLE advertised blocks to that
member. If there are still unread data messages sent out by
reclaimee before the REMIT, the member goes into an intermediate
state REMITTED, where it stays until the said messages have been
consumed.

- The returned advertised blocks can now be re-advertised to the
pending member, which is now set to state ACTIVE and added to
the active member list.

- To be proactive, i.e., to minimize the risk that any member will
end up in the pending queue, we start reclaiming resources already
when the number of active members exceeds 3/4 of the permitted
maximum.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

show more ...


# 2f487712 13-Oct-2017 Jon Maloy <jon.maloy@ericsson.com>

tipc: guarantee that group broadcast doesn't bypass group unicast

We need a mechanism guaranteeing that group unicasts sent out from a
socket are not bypassed by later sent broadcasts from the same

tipc: guarantee that group broadcast doesn't bypass group unicast

We need a mechanism guaranteeing that group unicasts sent out from a
socket are not bypassed by later sent broadcasts from the same socket.
We do this as follows:

- Each time a unicast is sent, we set a the broadcast method for the
socket to "replicast" and "mandatory". This forces the first
subsequent broadcast message to follow the same network and data path
as the preceding unicast to a destination, hence preventing it from
overtaking the latter.

- In order to make the 'same data path' statement above true, we let
group unicasts pass through the multicast link input queue, instead
of as previously through the unicast link input queue.

- In the first broadcast following a unicast, we set a new header flag,
requiring all recipients to immediately acknowledge its reception.

- During the period before all the expected acknowledges are received,
the socket refuses to accept any more broadcast attempts, i.e., by
blocking or returning EAGAIN. This period should typically not be
longer than a few microseconds.

- When all acknowledges have been received, the sending socket will
open up for subsequent broadcasts, this time giving the link layer
freedom to itself select the best transmission method.

- The forced and/or abrupt transmission method changes described above
may lead to broadcasts arriving out of order to the recipients. We
remedy this by introducing code that checks and if necessary
re-orders such messages at the receiving end.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

show more ...


# 5b8dddb6 13-Oct-2017 Jon Maloy <jon.maloy@ericsson.com>

tipc: introduce group multicast messaging

The previously introduced message transport to all group members is
based on the tipc multicast service, but is logically a broadcast
service within the gro

tipc: introduce group multicast messaging

The previously introduced message transport to all group members is
based on the tipc multicast service, but is logically a broadcast
service within the group, and that is what we call it.

We now add functionality for sending messages to all group members
having a certain identity. Correspondingly, we call this feature 'group
multicast'. The service is using unicast when only one destination is
found, otherwise it will use the bearer broadcast service to transfer
the messages. In the latter case, the receiving members filter arriving
messages by looking at the intended destination instance. If there is
no match, the message will be dropped, while still being considered
received and read as seen by the flow control mechanism.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

show more ...


# 27bd9ec0 13-Oct-2017 Jon Maloy <jon.maloy@ericsson.com>

tipc: introduce group unicast messaging

We now make it possible to send connectionless unicast messages
within a communication group. To send a message, the sender can use
either a direct port addre

tipc: introduce group unicast messaging

We now make it possible to send connectionless unicast messages
within a communication group. To send a message, the sender can use
either a direct port address, aka port identity, or an indirect port
name to be looked up.

This type of messages are subject to the same start synchronization
and flow control mechanism as group broadcast messages.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

show more ...


# b7d42635 13-Oct-2017 Jon Maloy <jon.maloy@ericsson.com>

tipc: introduce flow control for group broadcast messages

We introduce an end-to-end flow control mechanism for group broadcast
messages. This ensures that no messages are ever lost because of
desti

tipc: introduce flow control for group broadcast messages

We introduce an end-to-end flow control mechanism for group broadcast
messages. This ensures that no messages are ever lost because of
destination receive buffer overflow, with minimal impact on performance.
For now, the algorithm is based on the assumption that there is only one
active transmitter at any moment in time.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

show more ...


# ae236fb2 13-Oct-2017 Jon Maloy <jon.maloy@ericsson.com>

tipc: receive group membership events via member socket

Like with any other service, group members' availability can be
subscribed for by connecting to be topology server. However, because
the event

tipc: receive group membership events via member socket

Like with any other service, group members' availability can be
subscribed for by connecting to be topology server. However, because
the events arrive via a different socket than the member socket, there
is a real risk that membership events my arrive out of synch with the
actual JOIN/LEAVE action. I.e., it is possible to receive the first
messages from a new member before the corresponding JOIN event arrives,
just as it is possible to receive the last messages from a leaving
member after the LEAVE event has already been received.

Since each member socket is internally also subscribing for membership
events, we now fix this problem by passing those events on to the user
via the member socket. We leverage the already present member synch-
ronization protocol to guarantee correct message/event order. An event
is delivered to the user as an empty message where the two source
addresses identify the new/lost member. Furthermore, we set the MSG_OOB
bit in the message flags to mark it as an event. If the event is an
indication about a member loss we also set the MSG_EOR bit, so it can
be distinguished from a member addition event.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

show more ...


# 31c82a2d 13-Oct-2017 Jon Maloy <jon.maloy@ericsson.com>

tipc: add second source address to recvmsg()/recvfrom()

With group communication, it becomes important for a message receiver to
identify not only from which socket (identfied by a node:port tuple)

tipc: add second source address to recvmsg()/recvfrom()

With group communication, it becomes important for a message receiver to
identify not only from which socket (identfied by a node:port tuple) the
message was sent, but also the logical identity (type:instance) of the
sending member.

We fix this by adding a second instance of struct sockaddr_tipc to the
source address area when a message is read. The extra address struct
is filled in with data found in the received message header (type,) and
in the local member representation struct (instance.)

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

show more ...


# 75da2163 13-Oct-2017 Jon Maloy <jon.maloy@ericsson.com>

tipc: introduce communication groups

As a preparation for introducing flow control for multicast and datagram
messaging we need a more strictly defined framework than we have now. A
socket must be a

tipc: introduce communication groups

As a preparation for introducing flow control for multicast and datagram
messaging we need a more strictly defined framework than we have now. A
socket must be able keep track of exactly how many and which other
sockets it is allowed to communicate with at any moment, and keep the
necessary state for those.

We therefore introduce a new concept we have named Communication Group.
Sockets can join a group via a new setsockopt() call TIPC_GROUP_JOIN.
The call takes four parameters: 'type' serves as group identifier,
'instance' serves as an logical member identifier, and 'scope' indicates
the visibility of the group (node/cluster/zone). Finally, 'flags' makes
it possible to set certain properties for the member. For now, there is
only one flag, indicating if the creator of the socket wants to receive
a copy of broadcast or multicast messages it is sending via the socket,
and if wants to be eligible as destination for its own anycasts.

A group is closed, i.e., sockets which have not joined a group will
not be able to send messages to or receive messages from members of
the group, and vice versa.

Any member of a group can send multicast ('group broadcast') messages
to all group members, optionally including itself, using the primitive
send(). The messages are received via the recvmsg() primitive. A socket
can only be member of one group at a time.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

show more ...


# 64ac5f59 13-Oct-2017 Jon Maloy <jon.maloy@ericsson.com>

tipc: refactor function filter_rcv()

In the following commits we will need to handle multiple incoming and
rejected/returned buffers in the function socket.c::filter_rcv().
As a preparation for this

tipc: refactor function filter_rcv()

In the following commits we will need to handle multiple incoming and
rejected/returned buffers in the function socket.c::filter_rcv().
As a preparation for this, we generalize the function by handling
buffer queues instead of individual buffers. We also introduce a
help function tipc_skb_reject(), and rename filter_rcv() to
tipc_sk_filter_rcv() in line with other functions in socket.c.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

show more ...


# 14c04493 13-Oct-2017 Jon Maloy <jon.maloy@ericsson.com>

tipc: add ability to order and receive topology events in driver

As preparation for introducing communication groups, we add the ability
to issue topology subscriptions and receive topology events f

tipc: add ability to order and receive topology events in driver

As preparation for introducing communication groups, we add the ability
to issue topology subscriptions and receive topology events from kernel
space. This will make it possible for group member sockets to keep track
of other group members.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

show more ...


Revision tags: v4.13.5, v4.13, v4.12, v4.10.17, v4.10.16, v4.10.15, v4.10.14
# 0337966d 02-May-2017 Dmitry Torokhov <dmitry.torokhov@gmail.com>

Merge branch 'next' into for-linus

Prepare input updates for 4.12 merge window.


# 4d6ca227 02-May-2017 Jiri Kosina <jkosina@suse.cz>

Merge branch 'for-4.12/asus' into for-linus


1...<<11121314151617181920>>...36