07 Oct, 2016
1 commit
-
Pull rpmsg updates from Bjorn Andersson:
"The bulk of these patches involve splitting the rpmsg implementation
into a framework/API part and a virtio specific backend part. It then
adds the Qualcomm Shared Memory Device (SMD) as an additional
supported wire format.Also included is a set of code style cleanups that have been lingering
for a while"* tag 'rpmsg-v4.9' of git://github.com/andersson/remoteproc: (26 commits)
rpmsg: smd: fix dependency on QCOM_SMD=n
rpmsg: Introduce Qualcomm SMD backend
rpmsg: Allow callback to return errors
rpmsg: Move virtio specifics from public header
rpmsg: virtio: Hide vrp pointer from the public API
rpmsg: Hide rpmsg indirection tables
rpmsg: Split rpmsg core and virtio backend
rpmsg: Split off generic tail of create_channel()
rpmsg: Move helper for finding rpmsg devices to core
rpmsg: Move endpoint related interface to rpmsg core
rpmsg: Indirection table for rpmsg_endpoint operations
rpmsg: Move rpmsg_device API to new file
rpmsg: Introduce indirection table for rpmsg_device operations
rpmsg: Clean up rpmsg device vs channel naming
rpmsg: Make rpmsg_create_ept() take channel_info struct
rpmsg: rpmsg_send() operations takes rpmsg_endpoint
rpmsg: Name rpmsg devices based on channel id
rpmsg: Enable matching devices with drivers based on DT
rpmsg: Drop prototypes for non-existing functions
samples/rpmsg: add support for multiple instances
...
29 Sep, 2016
1 commit
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Suppose you have a map array value that is something like this
struct foo {
unsigned iter;
int array[SOME_CONSTANT];
};You can easily insert this into an array, but you cannot modify the contents of
foo->array[] after the fact. This is because we have no way to verify we won't
go off the end of the array at verification time. This patch provides a start
for this work. We accomplish this by keeping track of a minimum and maximum
value a register could be while we're checking the code. Then at the time we
try to do an access into a MAP_VALUE we verify that the maximum offset into that
region is a valid access into that memory region. So in practice, code such as
thisunsigned index = 0;
if (foo->iter >= SOME_CONSTANT)
foo->iter = index;
else
index = foo->iter++;
foo->array[index] = bar;would be allowed, as we can verify that index will always be between 0 and
SOME_CONSTANT-1. If you wish to use signed values you'll have to have an extra
check to make sure the index isn't less than 0, or do something like index %=
SOME_CONSTANT.Signed-off-by: Josef Bacik
Acked-by: Alexei Starovoitov
Signed-off-by: David S. Miller
27 Sep, 2016
2 commits
-
seccomp_phase1() does not exist anymore. Instead, update sample to use
__seccomp_filter(). While at it, set max locked memory to unlimited.Signed-off-by: Naveen N. Rao
Acked-by: Alexei Starovoitov
Signed-off-by: David S. Miller -
These samples fail to compile as 'struct flow_keys' conflicts with
definition in net/flow_dissector.h. Fix the same by renaming the
structure used in the sample.Signed-off-by: Naveen N. Rao
Acked-by: Alexei Starovoitov
Signed-off-by: David S. Miller
21 Sep, 2016
1 commit
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Add couple of test cases for direct write and the negative size issue, and
also adjust the direct packet access test4 since it asserts that writes are
not possible, but since we've just added support for writes, we need to
invert the verdict to ACCEPT, of course. Summary: 133 PASSED, 0 FAILED.Signed-off-by: Daniel Borkmann
Acked-by: Alexei Starovoitov
Signed-off-by: David S. Miller
17 Sep, 2016
2 commits
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the test creates 3 namespaces with veth connected via bridge.
First two namespaces simulate two different hosts with the same
IPv4 and IPv6 addresses configured on the tunnel interface and they
communicate with outside world via standard tunnels.
Third namespace creates collect_md tunnel that is driven by BPF
program which selects different remote host (either first or
second namespace) based on tcp dest port number while tcp dst
ip is the same.
This scenario is rough approximation of load balancer use case.
The tests check both traditional tunnel configuration and collect_md mode.Signed-off-by: Alexei Starovoitov
Signed-off-by: David S. Miller -
extend existing tests for vxlan, geneve, gre to include IPIP tunnel.
It tests both traditional tunnel configuration and
dynamic via bpf helpers.Signed-off-by: Alexei Starovoitov
Signed-off-by: David S. Miller
09 Sep, 2016
4 commits
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Some rpmsg backends support holding on to and redelivering messages upon
failed handling of them, so provide a way for the callback to report and
error and allow the backends to handle this.Signed-off-by: Bjorn Andersson
-
The rpmsg device representing struct is called rpmsg_channel and the
variable name used throughout is rpdev, with the communication happening
on endpoints it's clearer to just call this a "device" in a public API.Signed-off-by: Bjorn Andersson
-
The rpmsg_send() operations has been taking a rpmsg_device, but this
forces users of secondary rpmsg_endpoints to use the rpmsg_sendto()
interface - by extracting source and destination from the given data
structures. If we instead pass the rpmsg_endpoint to these functions a
service can use rpmsg_sendto() to respond to messages, even on secondary
endpoints.In addition this would allow us to support operations on multiple
channels in future backends that does not support off-channel
operations.Signed-off-by: Bjorn Andersson
-
LLVM can generate code that tests for direct packet access via
skb->data/data_end in a way that currently gets rejected by the
verifier, example:[...]
7: (61) r3 = *(u32 *)(r6 +80)
8: (61) r9 = *(u32 *)(r6 +76)
9: (bf) r2 = r9
10: (07) r2 += 54
11: (3d) if r3 >= r2 goto pc+12
R1=inv R2=pkt(id=0,off=54,r=0) R3=pkt_end R4=inv R6=ctx
R9=pkt(id=0,off=0,r=0) R10=fp
12: (18) r4 = 0xffffff7a
14: (05) goto pc+430
[...]from 11 to 24: R1=inv R2=pkt(id=0,off=54,r=0) R3=pkt_end R4=inv
R6=ctx R9=pkt(id=0,off=0,r=0) R10=fp
24: (7b) *(u64 *)(r10 -40) = r1
25: (b7) r1 = 0
26: (63) *(u32 *)(r6 +56) = r1
27: (b7) r2 = 40
28: (71) r8 = *(u8 *)(r9 +20)
invalid access to packet, off=20 size=1, R9(id=0,off=0,r=0)The reason why this gets rejected despite a proper test is that we
currently call find_good_pkt_pointers() only in case where we detect
tests like rX > pkt_end, where rX is of type pkt(id=Y,off=Z,r=0) and
derived, for example, from a register of type pkt(id=Y,off=0,r=0)
pointing to skb->data. find_good_pkt_pointers() then fills the range
in the current branch to pkt(id=Y,off=0,r=Z) on success.For above case, we need to extend that to recognize pkt_end >= rX
pattern and mark the other branch that is taken on success with the
appropriate pkt(id=Y,off=0,r=Z) type via find_good_pkt_pointers().
Since eBPF operates on BPF_JGT (>) and BPF_JGE (>=), these are the
only two practical options to test for from what LLVM could have
generated, since there's no such thing as BPF_JLT (= r2 goto pc+12
R1=inv R2=pkt(id=0,off=54,r=0) R3=pkt_end R4=inv R6=ctx
R9=pkt(id=0,off=0,r=0) R10=fp
12: (18) r4 = 0xffffff7a
14: (05) goto pc+430
[...]from 11 to 24: R1=inv R2=pkt(id=0,off=54,r=54) R3=pkt_end R4=inv
R6=ctx R9=pkt(id=0,off=0,r=54) R10=fp
24: (7b) *(u64 *)(r10 -40) = r1
25: (b7) r1 = 0
26: (63) *(u32 *)(r6 +56) = r1
27: (b7) r2 = 40
28: (71) r8 = *(u8 *)(r9 +20)
29: (bf) r1 = r8
30: (25) if r8 > 0x3c goto pc+47
R1=inv56 R2=imm40 R3=pkt_end R4=inv R6=ctx R8=inv56
R9=pkt(id=0,off=0,r=54) R10=fp
31: (b7) r1 = 1
[...]Verifier test cases are also added in this work, one that demonstrates
the mentioned example here and one that tries a bad packet access for
the current/fall-through branch (the one with types pkt(id=X,off=Y,r=0),
pkt(id=X,off=0,r=0)), then a case with good and bad accesses, and two
with both test variants (>, >=).Fixes: 969bf05eb3ce ("bpf: direct packet access")
Signed-off-by: Daniel Borkmann
Acked-by: Alexei Starovoitov
Signed-off-by: David S. Miller
03 Sep, 2016
2 commits
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sample instruction pointer and frequency count in a BPF map
Signed-off-by: Brendan Gregg
Signed-off-by: Alexei Starovoitov
Signed-off-by: David S. Miller -
The bpf program is called 50 times a second and does hashmap[kern&user_stackid]++
It's primary purpose to check that key bpf helpers like map lookup, update,
get_stackid, trace_printk and ctx access are all working.
It checks:
- PERF_COUNT_HW_CPU_CYCLES on all cpus
- PERF_COUNT_HW_CPU_CYCLES for current process and inherited perf_events to children
- PERF_COUNT_SW_CPU_CLOCK on all cpus
- PERF_COUNT_SW_CPU_CLOCK for current processSigned-off-by: Alexei Starovoitov
Signed-off-by: David S. Miller
20 Aug, 2016
1 commit
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The patch creates sample code exercising bpf_skb_{set,get}_tunnel_key,
and bpf_skb_{set,get}_tunnel_opt for GRE, VXLAN, and GENEVE. A native
tunnel device is created in a namespace to interact with a lwtunnel
device out of the namespace, with metadata enabled. The bpf_skb_set_*
program is attached to tc egress and bpf_skb_get_* is attached to egress
qdisc. A ping between two tunnels is used to verify correctness and
the result of bpf_skb_get_* printed by bpf_trace_printk.Signed-off-by: William Tu
Signed-off-by: David S. Miller
18 Aug, 2016
2 commits
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Minor overlapping changes for both merge conflicts.
Resolution work done by Stephen Rothwell was used
as a reference.Signed-off-by: David S. Miller
-
Pull networking fixes from David Miller:
1) Buffers powersave frame test is reversed in cfg80211, fix from Felix
Fietkau.2) Remove bogus WARN_ON in openvswitch, from Jarno Rajahalme.
3) Fix some tg3 ethtool logic bugs, and one that would cause no
interrupts to be generated when rx-coalescing is set to 0. From
Satish Baddipadige and Siva Reddy Kallam.4) QLCNIC mailbox corruption and napi budget handling fix from Manish
Chopra.5) Fix fib_trie logic when walking the trie during /proc/net/route
output than can access a stale node pointer. From David Forster.6) Several sctp_diag fixes from Phil Sutter.
7) PAUSE frame handling fixes in mlxsw driver from Ido Schimmel.
8) Checksum fixup fixes in bpf from Daniel Borkmann.
9) Memork leaks in nfnetlink, from Liping Zhang.
10) Use after free in rxrpc, from David Howells.
11) Use after free in new skb_array code of macvtap driver, from Jason
Wang.12) Calipso resource leak, from Colin Ian King.
13) mediatek bug fixes (missing stats sync init, etc.) from Sean Wang.
14) Fix bpf non-linear packet write helpers, from Daniel Borkmann.
15) Fix lockdep splats in macsec, from Sabrina Dubroca.
16) hv_netvsc bug fixes from Vitaly Kuznetsov, mostly to do with VF
handling.17) Various tc-action bug fixes, from CONG Wang.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (116 commits)
net_sched: allow flushing tc police actions
net_sched: unify the init logic for act_police
net_sched: convert tcf_exts from list to pointer array
net_sched: move tc offload macros to pkt_cls.h
net_sched: fix a typo in tc_for_each_action()
net_sched: remove an unnecessary list_del()
net_sched: remove the leftover cleanup_a()
mlxsw: spectrum: Allow packets to be trapped from any PG
mlxsw: spectrum: Unmap 802.1Q FID before destroying it
mlxsw: spectrum: Add missing rollbacks in error path
mlxsw: reg: Fix missing op field fill-up
mlxsw: spectrum: Trap loop-backed packets
mlxsw: spectrum: Add missing packet traps
mlxsw: spectrum: Mark port as active before registering it
mlxsw: spectrum: Create PVID vPort before registering netdevice
mlxsw: spectrum: Remove redundant errors from the code
mlxsw: spectrum: Don't return upon error in removal path
i40e: check for and deal with non-contiguous TCs
ixgbe: Re-enable ability to toggle VLAN filtering
ixgbe: Force VLNCTRL.VFE to be set in all VMDq paths
...
13 Aug, 2016
4 commits
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test various corner cases of the helper function access to the packet
via crafted XDP programs.Signed-off-by: Aaron Yue
Signed-off-by: Alexei Starovoitov
Acked-by: Daniel Borkmann
Signed-off-by: David S. Miller -
While hashing out BPF's current_task_under_cgroup helper bits, it came
to discussion that the skb_in_cgroup helper name was suboptimally chosen.Tejun says:
So, I think in_cgroup should mean that the object is in that
particular cgroup while under_cgroup in the subhierarchy of that
cgroup. Let's rename the other subhierarchy test to under too. I
think that'd be a lot less confusing going forward.[...]
It's more intuitive and gives us the room to implement the real
"in" test if ever necessary in the future.Since this touches uapi bits, we need to change this as long as v4.8
is not yet officially released. Thus, change the helper enum and rename
related bits.Fixes: 4a482f34afcc ("cgroup: bpf: Add bpf_skb_in_cgroup_proto")
Reference: http://patchwork.ozlabs.org/patch/658500/
Suggested-by: Sargun Dhillon
Suggested-by: Tejun Heo
Signed-off-by: Daniel Borkmann
Acked-by: Alexei Starovoitov -
This test has a BPF program which writes the last known pid to call the
sync syscall within a given cgroup to a map.The user mode program creates its own mount namespace, and mounts the
cgroupsv2 hierarchy in there, as on all current test systems
(Ubuntu 16.04, Debian), the cgroupsv2 vfs is unmounted by default.
Once it does this, it proceeds to test.The test checks for positive and negative condition. It ensures that
when it's part of a given cgroup, its pid is captured in the map,
and that when it leaves the cgroup, this doesn't happen.It populate a cgroups arraymap prior to execution in userspace. This means
that the program must be run in the same cgroups namespace as the programs
that are being traced.Signed-off-by: Sargun Dhillon
Cc: Alexei Starovoitov
Cc: Daniel Borkmann
Cc: Tejun Heo
Acked-by: Alexei Starovoitov
Signed-off-by: David S. Miller -
The current rpmsg_client_sample is a very simple example and
is not designed to handle multiple instances. Add support for
multiple instances, so that the same number of pings are sent
to each instance. The instances can be on one or multiple
remote processors.Signed-off-by: Suman Anna
Signed-off-by: Bjorn Andersson
11 Aug, 2016
1 commit
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The commit 555c8a8623a3 ("bpf: avoid stack copy and use skb ctx for event output")
started using 20 of initially reserved upper 32-bits of 'flags' argument
in bpf_perf_event_output(). Adjust corresponding prototype in samples/bpf/bpf_helpers.hSigned-off-by: Adam Barth
Signed-off-by: Alexei Starovoitov
Acked-by: Daniel Borkmann
Signed-off-by: David S. Miller
07 Aug, 2016
1 commit
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increase test coverage to check previously missing 'update when full'
Signed-off-by: Alexei Starovoitov
Signed-off-by: David S. Miller
04 Aug, 2016
4 commits
-
The regs_return_value() returns "unsigned long" or "long" value. But the
retval is int type now, it may cause overflow, the log may becomes:[ 2911.078869] do_brk returned -2003877888 and took 4620 ns to execute
This patch converts the retval to "unsigned long" type, and fixes the
overflow issue.Link: http://lkml.kernel.org/r/1464143083-3877-4-git-send-email-shijie.huang@arm.com
Signed-off-by: Huang Shijie
Cc: Petr Mladek
Cc: Steve Capper
Cc: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Cc: Masami Hiramatsu
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
We prefer to use the pr_* to print out the log now, this patch converts
the printk to pr_info. In the error path, use the pr_err to replace the
printk.Link: http://lkml.kernel.org/r/1464143083-3877-3-git-send-email-shijie.huang@arm.com
Signed-off-by: Huang Shijie
Cc: Petr Mladek
Cc: Steve Capper
Cc: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Cc: Masami Hiramatsu
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
We prefer to use the pr_* to print out the log now, this patch converts
the printk to pr_info. In the error path, use the pr_err to replace the
printk.Link: http://lkml.kernel.org/r/1464143083-3877-2-git-send-email-shijie.huang@arm.com
Signed-off-by: Huang Shijie
Cc: Petr Mladek
Cc: Steve Capper
Cc: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Cc: Masami Hiramatsu
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
We prefer to use the pr_* to print out the log now, this patch converts
the printk to pr_info. In the error path, use the pr_err to replace the
printk.Link: http://lkml.kernel.org/r/1464143083-3877-1-git-send-email-shijie.huang@arm.com
Signed-off-by: Huang Shijie
Cc: Petr Mladek
Cc: Steve Capper
Cc: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Cc: Masami Hiramatsu
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
30 Jul, 2016
1 commit
-
Pull security subsystem updates from James Morris:
"Highlights:- TPM core and driver updates/fixes
- IPv6 security labeling (CALIPSO)
- Lots of Apparmor fixes
- Seccomp: remove 2-phase API, close hole where ptrace can change
syscall #"* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (156 commits)
apparmor: fix SECURITY_APPARMOR_HASH_DEFAULT parameter handling
tpm: Add TPM 2.0 support to the Nuvoton i2c driver (NPCT6xx family)
tpm: Factor out common startup code
tpm: use devm_add_action_or_reset
tpm2_i2c_nuvoton: add irq validity check
tpm: read burstcount from TPM_STS in one 32-bit transaction
tpm: fix byte-order for the value read by tpm2_get_tpm_pt
tpm_tis_core: convert max timeouts from msec to jiffies
apparmor: fix arg_size computation for when setprocattr is null terminated
apparmor: fix oops, validate buffer size in apparmor_setprocattr()
apparmor: do not expose kernel stack
apparmor: fix module parameters can be changed after policy is locked
apparmor: fix oops in profile_unpack() when policy_db is not present
apparmor: don't check for vmalloc_addr if kvzalloc() failed
apparmor: add missing id bounds check on dfa verification
apparmor: allow SYS_CAP_RESOURCE to be sufficient to prlimit another task
apparmor: use list_next_entry instead of list_entry_next
apparmor: fix refcount race when finding a child profile
apparmor: fix ref count leak when profile sha1 hash is read
apparmor: check that xindex is in trans_table bounds
...
29 Jul, 2016
1 commit
-
Pull tracing updates from Steven Rostedt:
"This is mostly clean ups and small fixes. Some of the more visible
changes are:- The function pid code uses the event pid filtering logic
- [ku]probe events have access to current->comm
- trace_printk now has sample code
- PCI devices now trace physical addresses
- stack tracing has less unnessary functions traced"* tag 'trace-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
printk, tracing: Avoiding unneeded blank lines
tracing: Use __get_str() when manipulating strings
tracing, RAS: Cleanup on __get_str() usage
tracing: Use outer () on __get_str() definition
ftrace: Reduce size of function graph entries
tracing: Have HIST_TRIGGERS select TRACING
tracing: Using for_each_set_bit() to simplify trace_pid_write()
ftrace: Move toplevel init out of ftrace_init_tracefs()
tracing/function_graph: Fix filters for function_graph threshold
tracing: Skip more functions when doing stack tracing of events
tracing: Expose CPU physical addresses (resource values) for PCI devices
tracing: Show the preempt count of when the event was called
tracing: Add trace_printk sample code
tracing: Choose static tp_printk buffer by explicit nesting count
tracing: expose current->comm to [ku]probe events
ftrace: Have set_ftrace_pid use the bitmap like events do
tracing: Move pid_list write processing into its own function
tracing: Move the pid_list seq_file functions to be global
tracing: Move filtered_pid helper functions into trace.c
tracing: Make the pid filtering helper functions global
28 Jul, 2016
2 commits
-
Pull networking updates from David Miller:
1) Unified UDP encapsulation offload methods for drivers, from
Alexander Duyck.2) Make DSA binding more sane, from Andrew Lunn.
3) Support QCA9888 chips in ath10k, from Anilkumar Kolli.
4) Several workqueue usage cleanups, from Bhaktipriya Shridhar.
5) Add XDP (eXpress Data Path), essentially running BPF programs on RX
packets as soon as the device sees them, with the option to mirror
the packet on TX via the same interface. From Brenden Blanco and
others.6) Allow qdisc/class stats dumps to run lockless, from Eric Dumazet.
7) Add VLAN support to b53 and bcm_sf2, from Florian Fainelli.
8) Simplify netlink conntrack entry layout, from Florian Westphal.
9) Add ipv4 forwarding support to mlxsw spectrum driver, from Ido
Schimmel, Yotam Gigi, and Jiri Pirko.10) Add SKB array infrastructure and convert tun and macvtap over to it.
From Michael S Tsirkin and Jason Wang.11) Support qdisc packet injection in pktgen, from John Fastabend.
12) Add neighbour monitoring framework to TIPC, from Jon Paul Maloy.
13) Add NV congestion control support to TCP, from Lawrence Brakmo.
14) Add GSO support to SCTP, from Marcelo Ricardo Leitner.
15) Allow GRO and RPS to function on macsec devices, from Paolo Abeni.
16) Support MPLS over IPV4, from Simon Horman.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1622 commits)
xgene: Fix build warning with ACPI disabled.
be2net: perform temperature query in adapter regardless of its interface state
l2tp: Correctly return -EBADF from pppol2tp_getname.
net/mlx5_core/health: Remove deprecated create_singlethread_workqueue
net: ipmr/ip6mr: update lastuse on entry change
macsec: ensure rx_sa is set when validation is disabled
tipc: dump monitor attributes
tipc: add a function to get the bearer name
tipc: get monitor threshold for the cluster
tipc: make cluster size threshold for monitoring configurable
tipc: introduce constants for tipc address validation
net: neigh: disallow transition to NUD_STALE if lladdr is unchanged in neigh_update()
MAINTAINERS: xgene: Add driver and documentation path
Documentation: dtb: xgene: Add MDIO node
dtb: xgene: Add MDIO node
drivers: net: xgene: ethtool: Use phy_ethtool_gset and sset
drivers: net: xgene: Use exported functions
drivers: net: xgene: Enable MDIO driver
drivers: net: xgene: Add backward compatibility
drivers: net: phy: xgene: Add MDIO driver
... -
Pull arm64 updates from Catalin Marinas:
- Kexec support for arm64
- Kprobes support
- Expose MIDR_EL1 and REVIDR_EL1 CPU identification registers to sysfs
- Trapping of user space cache maintenance operations and emulation in
the kernel (CPU errata workaround)- Clean-up of the early page tables creation (kernel linear mapping,
EFI run-time maps) to avoid splitting larger blocks (e.g. pmds) into
smaller ones (e.g. ptes)- VDSO support for CLOCK_MONOTONIC_RAW in clock_gettime()
- ARCH_HAS_KCOV enabled for arm64
- Optimise IP checksum helpers
- SWIOTLB optimisation to only allocate/initialise the buffer if the
available RAM is beyond the 32-bit mask- Properly handle the "nosmp" command line argument
- Fix for the initialisation of the CPU debug state during early boot
- vdso-offsets.h build dependency workaround
- Build fix when RANDOMIZE_BASE is enabled with MODULES off
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (64 commits)
arm64: arm: Fix-up the removal of the arm64 regs_query_register_name() prototype
arm64: Only select ARM64_MODULE_PLTS if MODULES=y
arm64: mm: run pgtable_page_ctor() on non-swapper translation table pages
arm64: mm: make create_mapping_late() non-allocating
arm64: Honor nosmp kernel command line option
arm64: Fix incorrect per-cpu usage for boot CPU
arm64: kprobes: Add KASAN instrumentation around stack accesses
arm64: kprobes: Cleanup jprobe_return
arm64: kprobes: Fix overflow when saving stack
arm64: kprobes: WARN if attempting to step with PSTATE.D=1
arm64: debug: remove unused local_dbg_{enable, disable} macros
arm64: debug: remove redundant spsr manipulation
arm64: debug: unmask PSTATE.D earlier
arm64: localise Image objcopy flags
arm64: ptrace: remove extra define for CPSR's E bit
kprobes: Add arm64 case in kprobe example module
arm64: Add kernel return probes support (kretprobes)
arm64: Add trampoline code for kretprobes
arm64: kprobes instruction simulation support
arm64: Treat all entry code as non-kprobe-able
...
26 Jul, 2016
2 commits
-
This example shows using a kprobe to act as a dnat mechanism to divert
traffic for arbitrary endpoints. It rewrite the arguments to a syscall
while they're still in userspace, and before the syscall has a chance
to copy the argument into kernel space.Although this is an example, it also acts as a test because the mapped
address is 255.255.255.255:555 -> real address, and that's not a legal
address to connect to. If the helper is broken, the example will fail
on the intermediate steps, as well as the final step to verify the
rewrite of userspace memory succeeded.Signed-off-by: Sargun Dhillon
Cc: Alexei Starovoitov
Cc: Daniel Borkmann
Acked-by: Alexei Starovoitov
Signed-off-by: David S. Miller -
This allows user memory to be written to during the course of a kprobe.
It shouldn't be used to implement any kind of security mechanism
because of TOC-TOU attacks, but rather to debug, divert, and
manipulate execution of semi-cooperative processes.Although it uses probe_kernel_write, we limit the address space
the probe can write into by checking the space with access_ok.
We do this as opposed to calling copy_to_user directly, in order
to avoid sleeping. In addition we ensure the threads's current fs
/ segment is USER_DS and the thread isn't exiting nor a kernel thread.Given this feature is meant for experiments, and it has a risk of
crashing the system, and running programs, we print a warning on
when a proglet that attempts to use this helper is installed,
along with the pid and process name.Signed-off-by: Sargun Dhillon
Cc: Alexei Starovoitov
Cc: Daniel Borkmann
Acked-by: Alexei Starovoitov
Signed-off-by: David S. Miller
21 Jul, 2016
2 commits
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Add a '-6' option to the sample pktgen scripts for sending out
IPv6 packets.[root@kerneldev010.prn1 ~/pktgen]# ./pktgen_sample03_burst_single_flow.sh -i eth0 -s 64 -d fe80::f652:14ff:fec2:a14c -m f4:52:14:c2:a1:4c -b 32 -6
[root@kerneldev011.prn1 ~]# tcpdump -i eth0 -nn -c3 port 9
tcpdump: WARNING: eth0: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
14:38:51.815297 IP6 fe80::f652:14ff:fec2:2ad2.9 > fe80::f652:14ff:fec2:a14c.9: UDP, length 16
14:38:51.815311 IP6 fe80::f652:14ff:fec2:2ad2.9 > fe80::f652:14ff:fec2:a14c.9: UDP, length 16
14:38:51.815313 IP6 fe80::f652:14ff:fec2:2ad2.9 > fe80::f652:14ff:fec2:a14c.9: UDP, length 16Signed-off-by: Martin KaFai Lau
Acked-by: Alexei Starovoitov
Signed-off-by: David S. Miller -
The naming choice of index is not terribly descriptive, and dropcnt is
in fact incorrect for xdp2. Pick better names for these: ipproto and
rxcnt.Signed-off-by: Brenden Blanco
Acked-by: Alexei Starovoitov
Signed-off-by: David S. Miller
20 Jul, 2016
2 commits
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Add a sample that rewrites and forwards packets out on the same
interface. Observed single core forwarding performance of ~10Mpps.Since the mlx4 driver under test recycles every single packet page, the
perf output shows almost exclusively just the ring management and bpf
program work. Slowdowns are likely occurring due to cache misses.Signed-off-by: Brenden Blanco
Acked-by: Alexei Starovoitov
Signed-off-by: David S. Miller -
Add a sample program that only drops packets at the BPF_PROG_TYPE_XDP_RX
hook of a link. With the drop-only program, observed single core rate is
~20Mpps.Other tests were run, for instance without the dropcnt increment or
without reading from the packet header, the packet rate was mostly
unchanged.$ perf record -a samples/bpf/xdp1 $(
Acked-by: Alexei Starovoitov
Signed-off-by: David S. Miller
19 Jul, 2016
1 commit
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Add info prints in sample kprobe handlers for ARM64
Signed-off-by: Sandeepa Prabhu
Signed-off-by: David A. Long
Acked-by: Masami Hiramatsu
Signed-off-by: Catalin Marinas
15 Jul, 2016
3 commits
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Removing the pktgen sample script pktgen.conf-1-1-rdos, because
it does not contain anything that is not covered by the other and
newer style sample scripts.Signed-off-by: Jesper Dangaard Brouer
Signed-off-by: David S. Miller -
This pktgen sample script is useful for scalability testing a
receiver. The script will simply generate one flow per
thread (option -t N) using the thread number as part of the
source IP-address.The single flow sample (pktgen_sample03_burst_single_flow.sh)
have become quite popular, but it is important that developers
also make sure to benchmark scalability of multiple receive
queues.Signed-off-by: Jesper Dangaard Brouer
Acked-by: Alexei Starovoitov
Signed-off-by: David S. Miller -
Adding a pktgen sample script that demonstrates how to use pktgen
for simulating flows. Script will generate a certain number of
concurrent flows ($FLOWS) and each flow will contain $FLOWLEN
packets, which will be send back-to-back, before switching to a
new flow, due to flag FLOW_SEQ.This script obsoletes the old sample script 'pktgen.conf-1-1-flows',
which is removed.Signed-off-by: Jesper Dangaard Brouer
Signed-off-by: David S. Miller
