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Switch from passing msg->iov_iter.iov to passing msg itself
Signed-off-by: Al Viro <[email protected]>
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As it is, zero msg_iovlen means that the first iovec in the kernel
array of iovecs is left uninitialized, so checking if its ->iov_base
is NULL is random. Since the real users of that thing are doing
sendto(fd, NULL, 0, ...), they are getting msg_iovlen = 1 and
msg_iov[0] = {NULL, 0}, which is what this test is trying to catch.
As suggested by davem, let's just check that msg_iovlen was 1 and
msg_iov[0].iov_base was NULL - _that_ is well-defined and it catches
what we want to catch.
Signed-off-by: Al Viro <[email protected]>
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The functions "cipso_v4_doi_putdef" and "kfree" could be called in some cases
by the netlbl_mgmt_add_common() function during error handling even if the
passed variables contained still a null pointer.
* This implementation detail could be improved by adjustments for jump labels.
* Let us return immediately after the first failed function call according to
the current Linux coding style convention.
* Let us delete also an unnecessary check for the variable "entry" there.
Signed-off-by: Markus Elfring <[email protected]>
Acked-by: Paul Moore <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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"cipso_v4_doi_free"
The cipso_v4_doi_free() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <[email protected]>
Acked-by: Paul Moore <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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"cipso_v4_doi_putdef"
The cipso_v4_doi_putdef() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <[email protected]>
Acked-by: Paul Moore <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Fix an Oopsable condition when nsm_mon_unmon is called as part of the
namespace cleanup, which now apparently happens after the utsname
has been freed.
Link: http://lkml.kernel.org/r/[email protected]
Reported-by: Bruno Prémont <[email protected]>
Cc: [email protected] # 3.18
Signed-off-by: Trond Myklebust <[email protected]>
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* flexfiles: (53 commits)
pnfs: lookup new lseg at lseg boundary
nfs41: .init_read and .init_write can be called with valid pg_lseg
pnfs: Update documentation on the Layout Drivers
pnfs/flexfiles: Add the FlexFile Layout Driver
nfs: count DIO good bytes correctly with mirroring
nfs41: wait for LAYOUTRETURN before retrying LAYOUTGET
nfs: add a helper to set NFS_ODIRECT_RESCHED_WRITES to direct writes
nfs41: add NFS_LAYOUT_RETRY_LAYOUTGET to layout header flags
nfs/flexfiles: send layoutreturn before freeing lseg
nfs41: introduce NFS_LAYOUT_RETURN_BEFORE_CLOSE
nfs41: allow async version layoutreturn
nfs41: add range to layoutreturn args
pnfs: allow LD to ask to resend read through pnfs
nfs: add nfs_pgio_current_mirror helper
nfs: only reset desc->pg_mirror_idx when mirroring is supported
nfs41: add a debug warning if we destroy an unempty layout
pnfs: fail comparison when bucket verifier not set
nfs: mirroring support for direct io
nfs: add mirroring support to pgio layer
pnfs: pass ds_commit_idx through the commit path
...
Conflicts:
fs/nfs/pnfs.c
fs/nfs/pnfs.h
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Add a call to tally stats for a task under a different statsidx than
what's contained in the task structure.
This is needed to properly account for pnfs reads/writes when the
DS nfs version != the MDS version.
Signed-off-by: Weston Andros Adamson <[email protected]>
Signed-off-by: Tom Haynes <[email protected]>
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NFS: Client side changes for RDMA
These patches improve the scalability of the NFSoRDMA client and take large
variables off of the stack. Additionally, the GFP_* flags are updated to
match what TCP uses.
Signed-off-by: Anna Schumaker <[email protected]>
* tag 'nfs-rdma-for-3.20' of git://git.linux-nfs.org/projects/anna/nfs-rdma: (21 commits)
xprtrdma: Update the GFP flags used in xprt_rdma_allocate()
xprtrdma: Clean up after adding regbuf management
xprtrdma: Allocate zero pad separately from rpcrdma_buffer
xprtrdma: Allocate RPC/RDMA receive buffer separately from struct rpcrdma_rep
xprtrdma: Allocate RPC/RDMA send buffer separately from struct rpcrdma_req
xprtrdma: Allocate RPC send buffer separately from struct rpcrdma_req
xprtrdma: Add struct rpcrdma_regbuf and helpers
xprtrdma: Refactor rpcrdma_buffer_create() and rpcrdma_buffer_destroy()
xprtrdma: Simplify synopsis of rpcrdma_buffer_create()
xprtrdma: Take struct ib_qp_attr and ib_qp_init_attr off the stack
xprtrdma: Take struct ib_device_attr off the stack
xprtrdma: Free the pd if ib_query_qp() fails
xprtrdma: Remove rpcrdma_ep::rep_func and ::rep_xprt
xprtrdma: Move credit update to RPC reply handler
xprtrdma: Remove rl_mr field, and the mr_chunk union
xprtrdma: Remove rpcrdma_ep::rep_ia
xprtrdma: Rename "xprt" and "rdma_connect" fields in struct rpcrdma_xprt
xprtrdma: Clean up hdrlen
xprtrdma: Display XIDs in host byte order
xprtrdma: Modernize htonl and ntohl
...
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This is yet another Broadcom bluetooth chip with ACPI ID BCM2E40.
Signed-off-by: Mika Westerberg <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>
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The bnep_get_device function may be triggered by an ioctl just after a
connection has gone down. In such a case the respective L2CAP chan->conn
pointer will get set to NULL (by l2cap_chan_del). This patch adds a
missing NULL check for this case in the bnep_get_device() function.
Reported-by: Patrik Flykt <[email protected]>
Signed-off-by: Johan Hedberg <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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Pablo Neira Ayuso says:
====================
Netfilter/IPVS fixes for net
The following patchset contains Netfilter/IPVS fixes for your net tree,
they are:
1) Validate hooks for nf_tables NAT expressions, otherwise users can
crash the kernel when using them from the wrong hook. We already
got one user trapped on this when configuring masquerading.
2) Fix a BUG splat in nf_tables with CONFIG_DEBUG_PREEMPT=y. Reported
by Andreas Schultz.
3) Avoid unnecessary reroute of traffic in the local input path
in IPVS that triggers a crash in in xfrm. Reported by Florian
Wiessner and fixes by Julian Anastasov.
4) Fix memory and module refcount leak from the error path of
nf_tables_newchain().
====================
Signed-off-by: David S. Miller <[email protected]>
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The kfree() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <[email protected]>
Acked-By: Neil Horman <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Currntly, if we are not doing UFO on the packet, all UDP
packets will start with CHECKSUM_NONE and thus perform full
checksum computations in software even if device support
IPv6 checksum offloading.
Let's start start with CHECKSUM_PARTIAL if the device
supports it and we are sending only a single packet at
or below mtu size.
Signed-off-by: Vladislav Yasevich <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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This commit adds the same functionaliy to IPv6 that
commit 903ab86d195cca295379699299c5fc10beba31c7
Author: Herbert Xu <[email protected]>
Date: Tue Mar 1 02:36:48 2011 +0000
udp: Add lockless transmit path
added to IPv4.
UDP transmit path can now run without a socket lock,
thus allowing multiple threads to send to a single socket
more efficiently.
This is only used when corking/MSG_MORE is not used.
Signed-off-by: Vladislav Yasevich <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Now that we can individually construct IPv6 skbs to send, add a
udpv6_send_skb() function to populate the udp header and send the
skb. This allows udp_v6_push_pending_frames() to re-use this
function as well as enables us to add lockless sendmsg() support.
Signed-off-by: Vladislav Yasevich <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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This commit is very similar to
commit 1c32c5ad6fac8cee1a77449f5abf211e911ff830
Author: Herbert Xu <[email protected]>
Date: Tue Mar 1 02:36:47 2011 +0000
inet: Add ip_make_skb and ip_finish_skb
It adds IPv6 version of the helpers ip6_make_skb and ip6_finish_skb.
The job of ip6_make_skb is to collect messages into an ipv6 packet
and poplulate ipv6 eader. The job of ip6_finish_skb is to transmit
the generated skb. Together they replicated the job of
ip6_push_pending_frames() while also provide the capability to be
called independently. This will be needed to add lockless UDP sendmsg
support.
Signed-off-by: Vladislav Yasevich <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Add the ability to append data to arbitrary queue. This
will be needed later to implement lockless UDP sends.
Signed-off-by: Vladislav Yasevich <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Pull IPv6 cork initialization into its own function that
can be re-used. IPv6 specific cork data did not have an
explicit data structure. This patch creats eone so that
just ipv6 cork data can be as arguemts. Also, since
IPv6 tries to save the flow label into inet_cork_full
tructure, pass the full cork.
Adjust ip6_cork_release() to take cork data structures.
Signed-off-by: Vladislav Yasevich <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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One deployment requirement of DCTCP is to be able to run
in a DC setting along with TCP traffic. As Glenn Judd's
NSDI'15 paper "Attaining the Promise and Avoiding the Pitfalls
of TCP in the Datacenter" [1] (tba) explains, one way to
solve this on switch side is to split DCTCP and TCP traffic
in two queues per switch port based on the DSCP: one queue
soley intended for DCTCP traffic and one for non-DCTCP traffic.
For the DCTCP queue, there's the marking threshold K as
explained in commit e3118e8359bb ("net: tcp: add DCTCP congestion
control algorithm") for RED marking ECT(0) packets with CE.
For the non-DCTCP queue, there's f.e. a classic tail drop queue.
As already explained in e3118e8359bb, running DCTCP at scale
when not marking SYN/SYN-ACK packets with ECT(0) has severe
consequences as for non-ECT(0) packets, traversing the RED
marking DCTCP queue will result in a severe reduction of
connection probability.
This is due to the DCTCP queue being dominated by ECT(0) traffic
and switches handle non-ECT traffic in the RED marking queue
after passing K as drops, where K is usually a low watermark
in order to leave enough tailroom for bursts. Splitting DCTCP
traffic among several queues (ECN and non-ECN queue) is being
considered a terrible idea in the network community as it
splits single flows across multiple network paths.
Therefore, commit e3118e8359bb implements this on Linux as
ECT(0) marked traffic, as we argue that marking all packets
of a DCTCP flow is the only viable solution and also doesn't
speak against the draft.
However, recently, a DCTCP implementation for FreeBSD hit also
their mainline kernel [2]. In order to let them play well
together with Linux' DCTCP, we would need to loosen the
requirement that ECT(0) has to be asserted during the 3WHS as
not implemented in FreeBSD. This simplifies the ECN test and
lets DCTCP work together with FreeBSD.
Joint work with Daniel Borkmann.
[1] https://www.usenix.org/conference/nsdi15/technical-sessions/presentation/judd
[2] https://github.com/freebsd/freebsd/commit/8ad879445281027858a7fa706d13e458095b595f
Signed-off-by: Florian Westphal <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Cc: Glenn Judd <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Tx timestamps are looped onto the error queue on top of an skb. This
mechanism leaks packet headers to processes unless the no-payload
options SOF_TIMESTAMPING_OPT_TSONLY is set.
Add a sysctl that optionally drops looped timestamp with data. This
only affects processes without CAP_NET_RAW.
The policy is checked when timestamps are generated in the stack.
It is possible for timestamps with data to be reported after the
sysctl is set, if these were queued internally earlier.
No vulnerability is immediately known that exploits knowledge
gleaned from packet headers, but it may still be preferable to allow
administrators to lock down this path at the cost of possible
breakage of legacy applications.
Signed-off-by: Willem de Bruijn <[email protected]>
----
Changes
(v1 -> v2)
- test socket CAP_NET_RAW instead of capable(CAP_NET_RAW)
(rfc -> v1)
- document the sysctl in Documentation/sysctl/net.txt
- fix access control race: read .._OPT_TSONLY only once,
use same value for permission check and skb generation.
Signed-off-by: David S. Miller <[email protected]>
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Add timestamping option SOF_TIMESTAMPING_OPT_TSONLY. For transmit
timestamps, this loops timestamps on top of empty packets.
Doing so reduces the pressure on SO_RCVBUF. Payload inspection and
cmsg reception (aside from timestamps) are no longer possible. This
works together with a follow on patch that allows administrators to
only allow tx timestamping if it does not loop payload or metadata.
Signed-off-by: Willem de Bruijn <[email protected]>
----
Changes (rfc -> v1)
- add documentation
- remove unnecessary skb->len test (thanks to Richard Cochran)
Signed-off-by: David S. Miller <[email protected]>
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When receiving an interface activation notification, if
the RF interface is NCI_RF_INTERFACE_NFCEE_DIRECT, we
need to ignore the following parameters and change the NCI
state machine to NCI_LISTEN_ACTIVE. According to the NCI
specification, the parameters should be 0 and shall be
ignored.
Signed-off-by: Christophe Ricard <[email protected]>
Signed-off-by: Samuel Ortiz <[email protected]>
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The NFCC sends an NCI_OP_RF_NFCEE_ACTION_NTF notification
to the host (DH) to let it know that for example an RF
transaction with a payment reader is done.
For now the notification handler is empty.
Signed-off-by: Christophe Ricard <[email protected]>
Signed-off-by: Samuel Ortiz <[email protected]>
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NFC_EVT_TRANSACTION is sent through netlink in order for a
specific application running on a secure element to notify
userspace of an event. Typically the secure element application
counterpart on the host could interpret that event and act
upon it.
Forwarded information contains:
- SE host generating the event
- Application IDentifier doing the operation
- Applications parameters
Signed-off-by: Christophe Ricard <[email protected]>
Signed-off-by: Samuel Ortiz <[email protected]>
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According to the NCI specification, one can use HCI over NCI
to talk with specific NFCEE. The HCI network is viewed as one
logical NFCEE.
This is needed to support secure element running HCI only
firmwares embedded on an NCI capable chipset, like e.g. the
st21nfcb.
There is some duplication between this piece of code and the
HCI core code, but the latter would need to be abstracted even
more to be able to use NCI as a logical transport for HCP packets.
Signed-off-by: Christophe Ricard <[email protected]>
Signed-off-by: Samuel Ortiz <[email protected]>
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In order to communicate with an NFCEE, we need to open a logical
connection to it, by sending the NCI_OP_CORE_CONN_CREATE_CMD
command to the NFCC. It's left up to the drivers to decide when
to close an already opened logical connection.
Signed-off-by: Christophe Ricard <[email protected]>
Signed-off-by: Samuel Ortiz <[email protected]>
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NFCEEs can be enabled or disabled by sending the
NCI_OP_NFCEE_MODE_SET_CMD command to the NFCC. This patch
provides an API for drivers to enable and disable e.g. their
NCI discoveredd secure elements.
Signed-off-by: Christophe Ricard <[email protected]>
Signed-off-by: Samuel Ortiz <[email protected]>
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NFCEEs (NFC Execution Environment) have to be explicitly
discovered by sending the NCI_OP_NFCEE_DISCOVER_CMD
command. The NFCC will respond to this command by telling
us how many NFCEEs are connected to it. Then the NFCC sends
a notification command for each and every NFCEE connected.
Here we implement support for sending
NCI_OP_NFCEE_DISCOVER_CMD command, receiving the response
and the potential notifications.
Signed-off-by: Christophe Ricard <[email protected]>
Signed-off-by: Samuel Ortiz <[email protected]>
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The current NCI core only support the RF static connection.
For other NFC features such as Secure Element communication, we
may need to create logical connections to the NFCEE (Execution
Environment.
In order to track each logical connection ID dynamically, we add a
linked list of connection info pointers to the nci_dev structure.
Signed-off-by: Christophe Ricard <[email protected]>
Signed-off-by: Samuel Ortiz <[email protected]>
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This extended return parameters struct conflicts with the new Read Local
OOB Extended Data command definition. To avoid the conflict simply
rename the old "extended" version to the normal one and update the code
appropriately to take into account the two possible response PDU sizes.
Signed-off-by: Johan Hedberg <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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Christoph's block pnfs patches have some minor dependencies on these
lock patches.
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When using LE_SCAN_FILTER_DUP_ENABLE, some controllers would send
advertising report from each LE device only once. That means that we
don't get any updates on RSSI value, and makes Service Discovery very
slow. This patch adds restarting scan when in Service Discovery, and
device with filtered uuid is found, but it's not in RSSI range to send
event yet. This way if device moves into range, we will quickly get RSSI
update.
Signed-off-by: Jakub Pawlowski <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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Currently there is no way to restart le scan, and it's needed in
service scan method. The way it work: it disable, and then enable le
scan on controller.
During the restart, we must remember when the scan was started, and
it's duration, to later re-schedule the le_scan_disable work, that was
stopped during the stop scan phase.
Signed-off-by: Jakub Pawlowski <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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This patch adds support to set/del bridge port attributes in hardware from
the bridge driver.
With this, when the user sends a bridge setlink message with no flags or
master flags set,
- the bridge driver ndo_bridge_setlink handler sets settings in the kernel
- calls the swicthdev api to propagate the attrs to the switchdev
hardware
You can still use the self flag to go to the switch hw or switch port
driver directly.
With this, it also makes sure a notification goes out only after the
attributes are set both in the kernel and hw.
The patch calls switchdev api only if BRIDGE_FLAGS_SELF is not set.
This is because the offload cases with BRIDGE_FLAGS_SELF are handled in
the caller (in rtnetlink.c).
Signed-off-by: Roopa Prabhu <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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This patch adds two new api's netdev_switch_port_bridge_setlink
and netdev_switch_port_bridge_dellink to offload bridge port attributes
to switch port
(The names of the apis look odd with 'switch_port_bridge',
but am more inclined to change the prefix of the api to something else.
Will take any suggestions).
The api's look at the NETIF_F_HW_SWITCH_OFFLOAD feature flag to
pass bridge port attributes to the port device.
Signed-off-by: Roopa Prabhu <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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bridge flags are needed inside ndo_bridge_setlink/dellink handlers to
avoid another call to parse IFLA_AF_SPEC inside these handlers
This is used later in this series
Signed-off-by: Roopa Prabhu <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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In commit be9f4a44e7d41 ("ipv4: tcp: remove per net tcp_sock")
I tried to address contention on a socket lock, but the solution
I chose was horrible :
commit 3a7c384ffd57e ("ipv4: tcp: unicast_sock should not land outside
of TCP stack") addressed a selinux regression.
commit 0980e56e506b ("ipv4: tcp: set unicast_sock uc_ttl to -1")
took care of another regression.
commit b5ec8eeac46 ("ipv4: fix ip_send_skb()") fixed another regression.
commit 811230cd85 ("tcp: ipv4: initialize unicast_sock sk_pacing_rate")
was another shot in the dark.
Really, just use a proper socket per cpu, and remove the skb_orphan()
call, to re-enable flow control.
This solves a serious problem with FQ packet scheduler when used in
hostile environments, as we do not want to allocate a flow structure
for every RST packet sent in response to a spoofed packet.
Signed-off-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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When using Secure Connections Only mode, then only P-256 OOB data is
valid and should be provided. In case userspace provides P-192 and P-256
OOB data, then the P-192 values will be set to zero. However the present
value of the IO capability exchange still mentioned that both values
would be available. Fix this by telling the controller clearly that only
the P-256 OOB data is present.
Signed-off-by: Marcel Holtmann <[email protected]>
Signed-off-by: Johan Hedberg <[email protected]>
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For debugging purposes it is good to know which OOB data is actually
currently loaded for each controller. So expose that list via debugfs.
Signed-off-by: Marcel Holtmann <[email protected]>
Signed-off-by: Johan Hedberg <[email protected]>
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When the Hardware Error event is send by the controller, the Bluetooth
core stores the error code. Expose it via debugfs so it can be retrieved
later on.
Signed-off-by: Marcel Holtmann <[email protected]>
Signed-off-by: Johan Hedberg <[email protected]>
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To allow easier debugging when debug keys are generated, provide debugfs
entry for checking the setting of debug keys usage.
Signed-off-by: Marcel Holtmann <[email protected]>
Signed-off-by: Johan Hedberg <[email protected]>
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When the HCI Write Simple Pairing Debug Mode command has been issued,
the result needs to be tracked and stored. The hdev->ssp_debug_mode
variable is already present, but was never updated when the mode in
the controller was actually changed.
Signed-off-by: Marcel Holtmann <[email protected]>
Signed-off-by: Johan Hedberg <[email protected]>
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The value of the ssp_debug_mode should be accessible via debugfs to be
able to determine if a BR/EDR controller generates debugs keys or not.
Signed-off-by: Marcel Holtmann <[email protected]>
Signed-off-by: Johan Hedberg <[email protected]>
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Get rid of nr_cpu_ids and use modern percpu allocation.
Note that the sockets themselves are not yet allocated
using NUMA affinity.
Signed-off-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Current behavior only passes RTTs from sequentially acked data to CC.
If sender gets a combined ACK for segment 1 and SACK for segment 3, then the
computed RTT for CC is the time between sending segment 1 and receiving SACK
for segment 3.
Pass the minimum computed RTT from any acked data to CC, i.e. time between
sending segment 3 and receiving SACK for segment 3.
Signed-off-by: Kenneth Klette Jonassen <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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In case the remote only provided P-192 or P-256 data for OOB pairing,
then make sure that the data value pointers are correctly set. That way
the core can provide correct information when remote OOB data present
information have to be communicated.
Signed-off-by: Marcel Holtmann <[email protected]>
Signed-off-by: Johan Hedberg <[email protected]>
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Before setting the OOB data present flag with SMP pairing, check the
newly introduced present tracking that actual OOB data values have
been provided. The existence of remote OOB data structure does not
actually mean that the correct data values are available.
Signed-off-by: Marcel Holtmann <[email protected]>
Signed-off-by: Johan Hedberg <[email protected]>
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When BR/EDR Secure Connections has been enabled, the OOB data present
value can take 2 additional values. The host has to clearly provide
details about if P-192 OOB data, P-256 OOB data or a combination of
P-192 and P-256 OOB data is present.
In case BR/EDR Secure Connections is not enabled or not supported,
then check that P-192 OOB data is actually present and return the
correct value based on that.
Signed-off-by: Marcel Holtmann <[email protected]>
Signed-off-by: Johan Hedberg <[email protected]>
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Instead of doing complex calculation every time the OOB data is used,
just calculate the OOB data present value and store it with the OOB
data raw values.
Signed-off-by: Marcel Holtmann <[email protected]>
Signed-off-by: Johan Hedberg <[email protected]>
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