openwrt/staging/blogic.git
8 years agonetfilter: nft_lookup: remove superfluous element found check
Pablo Neira Ayuso [Tue, 20 Sep 2016 16:22:46 +0000 (18:22 +0200)]
netfilter: nft_lookup: remove superfluous element found check

We already checked for !found just a bit before:

        if (!found) {
                regs->verdict.code = NFT_BREAK;
                return;
        }

        if (found && set->flags & NFT_SET_MAP)
            ^^^^^

So this redundant check can just go away.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: xt_helper: Use sizeof(variable) instead of literal number
Gao Feng [Tue, 20 Sep 2016 02:31:04 +0000 (10:31 +0800)]
netfilter: xt_helper: Use sizeof(variable) instead of literal number

It's better to use sizeof(info->name)-1 as index to force set the string
tail instead of literal number '29'.

Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: Enhance the codes used to get random once
Gao Feng [Sun, 18 Sep 2016 02:52:25 +0000 (10:52 +0800)]
netfilter: Enhance the codes used to get random once

There are some codes which are used to get one random once in netfilter.
We could use net_get_random_once to simplify these codes.

Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nf_tables: check tprot_set first when we use xt.thoff
Liping Zhang [Sat, 17 Sep 2016 06:31:20 +0000 (14:31 +0800)]
netfilter: nf_tables: check tprot_set first when we use xt.thoff

pkt->xt.thoff is not always set properly, but we use it without any check.
For payload expr, it will cause wrong results. For nftrace, we may notify
the wrong network or transport header to the user space, furthermore,
input the following nft rules, warning message will be printed out:
  # nft add rule arp filter output meta nftrace set 1

  WARNING: CPU: 0 PID: 13428 at net/netfilter/nf_tables_trace.c:263
  nft_trace_notify+0x4a3/0x5e0 [nf_tables]
  Call Trace:
  [<ffffffff813d58ae>] dump_stack+0x63/0x85
  [<ffffffff810a4c0b>] __warn+0xcb/0xf0
  [<ffffffff810a4d3d>] warn_slowpath_null+0x1d/0x20
  [<ffffffffa0589703>] nft_trace_notify+0x4a3/0x5e0 [nf_tables]
  [ ... ]
  [<ffffffffa05690a8>] nft_do_chain_arp+0x78/0x90 [nf_tables_arp]
  [<ffffffff816f4aa2>] nf_iterate+0x62/0x80
  [<ffffffff816f4b33>] nf_hook_slow+0x73/0xd0
  [<ffffffff81732bbf>] arp_xmit+0x8f/0xb0
  [ ... ]
  [<ffffffff81732d36>] arp_solicit+0x106/0x2c0

So before we use pkt->xt.thoff, check the tprot_set first.

Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nf_tables: improve nft payload fast eval
Liping Zhang [Thu, 15 Sep 2016 13:29:08 +0000 (21:29 +0800)]
netfilter: nf_tables: improve nft payload fast eval

There's an off-by-one issue in nft_payload_fast_eval, skb_tail_pointer
and ptr + priv->len all point to the last valid address plus 1. So if
they are equal, we can still fetch the valid data. It's unnecessary to
fall back to nft_payload_eval.

Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nf_queue: improve queue range support for bridge family
Liping Zhang [Thu, 15 Sep 2016 12:50:16 +0000 (20:50 +0800)]
netfilter: nf_queue: improve queue range support for bridge family

After commit ac2863445686 ("netfilter: bridge: add nf_afinfo to enable
queuing to userspace"), we can queue packets to the user space in bridge
family. But when the user specify the queue range, packets will be only
delivered to the first queue num. Because in nfqueue_hash, we only support
ipv4 and ipv6 family. Now add support for bridge family too.

Suggested-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nft_queue: add _SREG_QNUM attr to select the queue number
Liping Zhang [Wed, 14 Sep 2016 15:41:46 +0000 (23:41 +0800)]
netfilter: nft_queue: add _SREG_QNUM attr to select the queue number

Currently, the user can specify the queue numbers by _QUEUE_NUM and
_QUEUE_TOTAL attributes, this is enough in most situations.

But acctually, it is not very flexible, for example:
  tcp dport 80 mapped to queue0
  tcp dport 81 mapped to queue1
  tcp dport 82 mapped to queue2
In order to do this thing, we must add 3 nft rules, and more
mapping meant more rules ...

So take one register to select the queue number, then we can add one
simple rule to mapping queues, maybe like this:
  queue num tcp dport map { 80:0, 81:1, 82:2 ... }

Florian Westphal also proposed wider usage scenarios:
  queue num jhash ip saddr . ip daddr mod ...
  queue num meta cpu ...
  queue num meta mark ...

The last point is how to load a queue number from sreg, although we can
use *(u16*)&regs->data[reg] to load the queue number, just like nat expr
to load its l4port do.

But we will cooperate with hash expr, meta cpu, meta mark expr and so on.
They all store the result to u32 type, so cast it to u16 pointer and
dereference it will generate wrong result in the big endian system.

So just keep it simple, we treat queue number as u32 type, although u16
type is already enough.

Suggested-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nf_tables: validate maximum value of u32 netlink attributes
Laura Garcia Liebana [Wed, 14 Sep 2016 13:00:02 +0000 (15:00 +0200)]
netfilter: nf_tables: validate maximum value of u32 netlink attributes

Fetch value and validate u32 netlink attribute. This validation is
usually required when the u32 netlink attributes are being stored in a
field whose size is smaller.

This patch revisits 4da449ae1df9 ("netfilter: nft_exthdr: Add size check
on u8 nft_exthdr attributes").

Fixes: 96518518cc41 ("netfilter: add nftables")
Suggested-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Laura Garcia Liebana <nevola@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nft_numgen: add number generation offset
Laura Garcia Liebana [Tue, 13 Sep 2016 11:49:53 +0000 (13:49 +0200)]
netfilter: nft_numgen: add number generation offset

Add support of an offset value for incremental counter and random. With
this option the sysadmin is able to start the counter to a certain value
and then apply the generated number.

Example:

meta mark set numgen inc mod 2 offset 100

This will generate marks with the serie 100, 101, 100, 101, ...

Suggested-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Laura Garcia Liebana <nevola@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nft_hash: fix hash overflow validation
Laura Garcia Liebana [Tue, 13 Sep 2016 08:21:46 +0000 (10:21 +0200)]
netfilter: nft_hash: fix hash overflow validation

The overflow validation in the init() function establishes that the
maximum value that the hash could reach is less than U32_MAX, which is
likely to be true.

The fix detects the overflow when the maximum hash value is less than
the offset itself.

Fixes: 70ca767ea1b2 ("netfilter: nft_hash: Add hash offset value")
Reported-by: Liping Zhang <liping.zhang@spreadtrum.com>
Signed-off-by: Laura Garcia Liebana <nevola@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nft_numgen: fix race between num generate and store it
Liping Zhang [Mon, 12 Sep 2016 14:21:36 +0000 (22:21 +0800)]
netfilter: nft_numgen: fix race between num generate and store it

After we generate a new number, we still use the priv->counter and
store it to the dreg. This is not correct, another cpu may already
change it to a new number. So we must use the generated number, not
the priv->counter itself.

Fixes: 91dbc6be0a62 ("netfilter: nf_tables: add number generator expression")
Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: conntrack: remove packet hotpath stats
Florian Westphal [Sun, 11 Sep 2016 20:55:53 +0000 (22:55 +0200)]
netfilter: conntrack: remove packet hotpath stats

These counters sit in hot path and do show up in perf, this is especially
true for 'found' and 'searched' which get incremented for every packet
processed.

Information like

searched=212030105
new=623431
found=333613
delete=623327

does not seem too helpful nowadays:

- on busy systems found and searched will overflow every few hours
(these are 32bit integers), other more busy ones every few days.

- for debugging there are better methods, such as iptables' trace target,
the conntrack log sysctls.  Nowadays we also have perf tool.

This removes packet path stat counters except those that
are expected to be 0 (or close to 0) on a normal system, e.g.
'insert_failed' (race happened) or 'invalid' (proto tracker rejects).

The insert stat is retained for the ctnetlink case.
The found stat is retained for the tuple-is-taken check when NAT has to
determine if it needs to pick a different source address.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nf_queue: get rid of dependency on IP6_NF_IPTABLES
Liping Zhang [Sun, 11 Sep 2016 14:05:27 +0000 (22:05 +0800)]
netfilter: nf_queue: get rid of dependency on IP6_NF_IPTABLES

hash_v6 is used by both nftables and ip6tables, so depend on
IP6_NF_IPTABLES is not properly.

Actually, it only parses ipv6hdr and computes a hash value, so
even if IPV6 is disabled, there's no side effect too, remove it.

Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: Add the missed return value check of nft_register_chain_type
Gao Feng [Sat, 10 Sep 2016 02:04:30 +0000 (10:04 +0800)]
netfilter: Add the missed return value check of nft_register_chain_type

There are some codes of netfilter module which did not check the return
value of nft_register_chain_type. Add the checks now.

Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: Add the missed return value check of register_netdevice_notifier
Gao Feng [Fri, 9 Sep 2016 15:25:09 +0000 (23:25 +0800)]
netfilter: Add the missed return value check of register_netdevice_notifier

There are some codes of netfilter module which did not check the return
value of register_netdevice_notifier. Add the checks now.

Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nf_conntrack: simplify __nf_ct_try_assign_helper() return logic
Pablo Neira [Fri, 9 Sep 2016 12:01:26 +0000 (14:01 +0200)]
netfilter: nf_conntrack: simplify __nf_ct_try_assign_helper() return logic

Instead of several goto's just to return the result, simply return it.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nf_tables: don't drop IPv6 packets that cannot parse transport
Pablo Neira Ayuso [Fri, 9 Sep 2016 10:42:53 +0000 (12:42 +0200)]
netfilter: nf_tables: don't drop IPv6 packets that cannot parse transport

This is overly conservative and not flexible at all, so better let them
go through and let the filtering policy decide what to do with them. We
use skb_header_pointer() all over the place so we would just fail to
match when trying to access fields from malformed traffic.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nf_tables_bridge: use nft_set_pktinfo_ipv{4, 6}_validate
Pablo Neira Ayuso [Fri, 9 Sep 2016 10:42:52 +0000 (12:42 +0200)]
netfilter: nf_tables_bridge: use nft_set_pktinfo_ipv{4, 6}_validate

Consolidate pktinfo setup and validation by using the new generic
functions so we converge to the netdev family codebase.

We only need a linear IPv4 and IPv6 header from the reject expression,
so move nft_bridge_iphdr_validate() and nft_bridge_ip6hdr_validate()
to net/bridge/netfilter/nft_reject_bridge.c.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: introduce nft_set_pktinfo_{ipv4, ipv6}_validate()
Pablo Neira Ayuso [Fri, 9 Sep 2016 10:42:51 +0000 (12:42 +0200)]
netfilter: introduce nft_set_pktinfo_{ipv4, ipv6}_validate()

These functions are extracted from the netdev family, they initialize
the pktinfo structure and validate that the IPv4 and IPv6 headers are
well-formed given that these functions are called from a path where
layer 3 sanitization did not happen yet.

These functions are placed in include/net/netfilter/nf_tables_ipv{4,6}.h
so they can be reused by a follow up patch to use them from the bridge
family too.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nf_tables_ipv6: setup pktinfo transport field on failure to parse
Pablo Neira Ayuso [Fri, 9 Sep 2016 10:42:50 +0000 (12:42 +0200)]
netfilter: nf_tables_ipv6: setup pktinfo transport field on failure to parse

Make sure the pktinfo protocol fields are initialized if this fails to
parse the transport header.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nf_tables: ensure proper initialization of nft_pktinfo fields
Pablo Neira Ayuso [Fri, 9 Sep 2016 10:42:49 +0000 (12:42 +0200)]
netfilter: nf_tables: ensure proper initialization of nft_pktinfo fields

This patch introduces nft_set_pktinfo_unspec() that ensures proper
initialization all of pktinfo fields for non-IP traffic. This is used
by the bridge, netdev and arp families.

This new function relies on nft_set_pktinfo_proto_unspec() to set a new
tprot_set field that indicates if transport protocol information is
available. Remain fields are zeroed.

The meta expression has been also updated to check to tprot_set in first
place given that zero is a valid tprot value. Even a handcrafted packet
may come with the IPPROTO_RAW (255) protocol number so we can't rely on
this value as tprot unset.

Reported-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nft_dynset: allow to invert match criteria
Pablo Neira Ayuso [Wed, 7 Sep 2016 10:22:18 +0000 (12:22 +0200)]
netfilter: nft_dynset: allow to invert match criteria

The dynset expression matches if we can fit a new entry into the set.
If there is no room for it, then it breaks the rule evaluation.

This patch introduces the inversion flag so you can add rules to
explicitly drop packets that don't fit into the set. For example:

 # nft filter input flow table xyz size 4 { ip saddr timeout 120s counter } overflow drop

This is useful to provide a replacement for connlimit.

For the rule above, every new entry uses the IPv4 address as key in the
set, this entry gets a timeout of 120 seconds that gets refresh on every
packet seen. If we get new flow and our set already contains 4 entries
already, then this packet is dropped.

You can already express this in positive logic, assuming default policy
to drop:

 # nft filter input flow table xyz size 4 { ip saddr timeout 10s counter } accept

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nft_hash: Add hash offset value
Laura Garcia Liebana [Tue, 6 Sep 2016 06:44:19 +0000 (08:44 +0200)]
netfilter: nft_hash: Add hash offset value

Add support to pass through an offset to the hash value. With this
feature, the sysadmin is able to generate a hash with a given
offset value.

Example:

meta mark set jhash ip saddr mod 2 seed 0xabcd offset 100

This option generates marks according to the source address from 100 to
101.

Signed-off-by: Laura Garcia Liebana <nevola@gmail.com>
8 years agonetfilter: nf_conntrack: remove unused ctl_table_path member in nf_conntrack_l3proto
Liping Zhang [Tue, 6 Sep 2016 14:35:47 +0000 (22:35 +0800)]
netfilter: nf_conntrack: remove unused ctl_table_path member in nf_conntrack_l3proto

After commit adf0516845bc ("netfilter: remove ip_conntrack* sysctl
compat code"), ctl_table_path member in struct nf_conntrack_l3proto{}
is not used anymore, remove it.

Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nft_queue: check the validation of queues_total and queuenum
Liping Zhang [Tue, 6 Sep 2016 14:33:37 +0000 (22:33 +0800)]
netfilter: nft_queue: check the validation of queues_total and queuenum

Although the validation of queues_total and queuenum is checked in nft
utility, but user can add nft rules via nfnetlink, so it is necessary
to check the validation at the nft_queue expr init routine too.

Tested by run ./nft-test.py any/queue.t:
  any/queue.t: 6 unit tests, 0 error, 0 warning

Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nf_ct_sip: allow tab character in SIP headers
Marco Angaroni [Tue, 30 Aug 2016 16:52:22 +0000 (18:52 +0200)]
netfilter: nf_ct_sip: allow tab character in SIP headers

Current parsing methods for SIP headers do not allow the presence of
tab characters between header name and header value. As a result Call-ID
SIP headers like the following are discarded by IPVS SIP persistence
engine:

"Call-ID\t: mycallid@abcde"
"Call-ID:\tmycallid@abcde"

In above examples Call-IDs are represented as strings in C language.
Obviously in real message we have byte "09" before/after colon (":").

Proposed fix is in nf_conntrack_sip module.
Function sip_skip_whitespace() should skip tabs in addition to spaces,
since in SIP grammar whitespace (WSP) corresponds to space or tab.

Below is an extract of relevant SIP ABNF syntax.

Call-ID  =  ( "Call-ID" / "i" ) HCOLON callid
callid   =  word [ "@" word ]

HCOLON  =  *( SP / HTAB ) ":" SWS
SWS     =  [LWS] ; sep whitespace
LWS     =  [*WSP CRLF] 1*WSP ; linear whitespace
WSP     =  SP / HTAB
word    =  1*(alphanum / "-" / "." / "!" / "%" / "*" /
           "_" / "+" / "`" / "'" / "~" /
           "(" / ")" / "<" / ">" /
           ":" / "\" / DQUOTE /
           "/" / "[" / "]" / "?" /
           "{" / "}" )

Signed-off-by: Marco Angaroni <marcoangaroni@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nft_quota: introduce nft_overquota()
Pablo Neira Ayuso [Fri, 2 Sep 2016 19:00:59 +0000 (21:00 +0200)]
netfilter: nft_quota: introduce nft_overquota()

This is patch renames the existing function to nft_overquota() and make
it return a boolean that tells us if we have exceeded our byte quota.
Just a cleanup.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nft_quota: fix overquota logic
Pablo Neira Ayuso [Fri, 2 Sep 2016 19:00:58 +0000 (21:00 +0200)]
netfilter: nft_quota: fix overquota logic

Use xor to decide to break further rule evaluation or not, since the
existing logic doesn't achieve the expected inversion.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nft_numgen: rename until attribute by modulus
Laura Garcia Liebana [Fri, 2 Sep 2016 13:05:57 +0000 (15:05 +0200)]
netfilter: nft_numgen: rename until attribute by modulus

The _until_ attribute is renamed to _modulus_ as the behaviour is similar to
other expresions with number limits (ex. nft_hash).

Renaming is possible because there isn't a kernel release yet with these
changes.

Signed-off-by: Laura Garcia Liebana <nevola@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: ftp: Remove the useless code
Gao Feng [Thu, 1 Sep 2016 10:59:02 +0000 (18:59 +0800)]
netfilter: ftp: Remove the useless code

There are some debug code which are commented out in find_pattern by #if 0.
Now remove them.

Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: ftp: Remove the useless dlen==0 condition check in find_pattern
Gao Feng [Thu, 1 Sep 2016 10:58:29 +0000 (18:58 +0800)]
netfilter: ftp: Remove the useless dlen==0 condition check in find_pattern

The caller function "help" has already make sure the datalen could not be zero
before invoke find_pattern as a parameter by the following codes

        if (dataoff >= skb->len) {
                pr_debug("ftp: dataoff(%u) >= skblen(%u)\n", dataoff,
                         skb->len);
                return NF_ACCEPT;
        }
        datalen = skb->len - dataoff;

And the latter codes "ends_in_nl = (fb_ptr[datalen - 1] == '\n');" use datalen
directly without checking if it is zero.

So it is unneccessary to check it in find_pattern too.

Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nf_ct_sip: correct allowed characters in Call-ID SIP header
Marco Angaroni [Tue, 30 Aug 2016 16:48:24 +0000 (18:48 +0200)]
netfilter: nf_ct_sip: correct allowed characters in Call-ID SIP header

Current parsing methods for SIP header Call-ID do not check correctly all
characters allowed by RFC 3261. In particular "," character is allowed
instead of "'" character. As a result Call-ID headers like the following
are discarded by IPVS SIP persistence engine.

Call-ID: -.!%*_+`'~()<>:\"/[]?{}

Above example is composed using all non-alphanumeric characters listed
in RFC 3261 for Call-ID header syntax.

Proposed fix is in nf_conntrack_sip module; function iswordc() checks this
range: (c >= '(' && c <= '/') which includes these characters: ()*+,-./
They are all allowed except ",". Instead "'" is not included in the list.

Below is an extract of relevant SIP ABNF syntax.

Call-ID  =  ( "Call-ID" / "i" ) HCOLON callid
callid   =  word [ "@" word ]

HCOLON  =  *( SP / HTAB ) ":" SWS
SWS     =  [LWS] ; sep whitespace
LWS     =  [*WSP CRLF] 1*WSP ; linear whitespace
WSP     =  SP / HTAB
word    =  1*(alphanum / "-" / "." / "!" / "%" / "*" /
           "_" / "+" / "`" / "'" / "~" /
           "(" / ")" / "<" / ">" /
           ":" / "\" / DQUOTE /
           "/" / "[" / "]" / "?" /
           "{" / "}" )

Signed-off-by: Marco Angaroni <marcoangaroni@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nf_ct_sip: correct parsing of continuation lines in SIP headers
Marco Angaroni [Tue, 30 Aug 2016 16:48:19 +0000 (18:48 +0200)]
netfilter: nf_ct_sip: correct parsing of continuation lines in SIP headers

Current parsing methods for SIP headers do not properly manage
continuation lines: in case of Call-ID header the first character of
Call-ID header value is truncated. As a result IPVS SIP persistence
engine hashes over a call-id that is not exactly the one present in
the originale message.

Example: "Call-ID: \r\n abcdeABCDE1234"
results in extracted call-id equal to "bcdeABCDE1234".

In above example Call-ID is represented as a string in C language.
Obviously in real message the first bytes after colon (":") are
"20 0d 0a 20".

Proposed fix is in nf_conntrack_sip module.
Since sip_follow_continuation() function walks past the leading
spaces or tabs of the continuation line, sip_skip_whitespace()
should simply return the ouput of sip_follow_continuation().
Otherwise another iteration of the for loop is done and dptr
is incremented by one pointing to the second character of the
first word in the header.

Below is an extract of relevant SIP ABNF syntax.

Call-ID  =  ( "Call-ID" / "i" ) HCOLON callid
callid   =  word [ "@" word ]

HCOLON  =  *( SP / HTAB ) ":" SWS
SWS     =  [LWS] ; sep whitespace
LWS     =  [*WSP CRLF] 1*WSP ; linear whitespace
WSP     =  SP / HTAB
word    =  1*(alphanum / "-" / "." / "!" / "%" / "*" /
           "_" / "+" / "`" / "'" / "~" /
           "(" / ")" / "<" / ">" /
           ":" / "\" / DQUOTE /
           "/" / "[" / "]" / "?" /
           "{" / "}" )

Signed-off-by: Marco Angaroni <marcoangaroni@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: gre: Use consistent GRE and PTTP header structure instead of the ones...
Gao Feng [Thu, 25 Aug 2016 15:08:47 +0000 (23:08 +0800)]
netfilter: gre: Use consistent GRE and PTTP header structure instead of the ones defined by netfilter

There are two existing strutures which defines the GRE and PPTP header.
So use these two structures instead of the ones defined by netfilter to
keep consitent with other codes.

Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: gre: Use consistent GRE_* macros instead of ones defined by netfilter.
Gao Feng [Thu, 25 Aug 2016 15:08:11 +0000 (23:08 +0800)]
netfilter: gre: Use consistent GRE_* macros instead of ones defined by netfilter.

There are already some GRE_* macros in kernel, so it is unnecessary
to define these macros. And remove some useless macros

Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agoptp: ixp46x: remove NO_IRQ handling
Arnd Bergmann [Tue, 6 Sep 2016 19:20:36 +0000 (21:20 +0200)]
ptp: ixp46x: remove NO_IRQ handling

gpio_to_irq does not return NO_IRQ but instead returns a negative
error code on failure. Returning NO_IRQ from the function has no
negative effects as we only compare the result to the expected
interrupt number, but it's better to return a proper failure
code for consistency, and we should remove NO_IRQ from the kernel
entirely.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosfc: check MTU against minimum threshold
Bert Kenward [Tue, 6 Sep 2016 16:50:00 +0000 (17:50 +0100)]
sfc: check MTU against minimum threshold

Reported-by: Ma Yuying <yuma@redhat.com>
Suggested-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Bert Kenward <bkenward@solarflare.com>
Reviewed-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoperf, bpf: fix conditional call to bpf_overflow_handler
Arnd Bergmann [Tue, 6 Sep 2016 13:10:22 +0000 (15:10 +0200)]
perf, bpf: fix conditional call to bpf_overflow_handler

The newly added bpf_overflow_handler function is only built of both
CONFIG_EVENT_TRACING and CONFIG_BPF_SYSCALL are enabled, but the caller
only checks the latter:

kernel/events/core.c: In function 'perf_event_alloc':
kernel/events/core.c:9106:27: error: 'bpf_overflow_handler' undeclared (first use in this function)

This changes the caller so we also skip this call if CONFIG_EVENT_TRACING
is disabled entirely.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: aa6a5f3cb2b2 ("perf, bpf: add perf events core support for BPF_PROG_TYPE_PERF_EVENT programs")
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: arc_emac: mark arc_mdio_reset() static
Baoyou Xie [Tue, 6 Sep 2016 08:21:56 +0000 (16:21 +0800)]
net: arc_emac: mark arc_mdio_reset() static

We get 1 warning when building kernel with W=1:
drivers/net/ethernet/arc/emac_mdio.c:107:5: warning: no previous prototype for 'arc_mdio_reset' [-Wmissing-prototypes]

In fact, this function is only used in the file in which it is
declared and don't need a declaration, but can be made static.
so this patch marks this function with 'static'.

Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agolan78xx: mark symbols static where possible
Baoyou Xie [Tue, 6 Sep 2016 08:19:02 +0000 (16:19 +0800)]
lan78xx: mark symbols static where possible

We get a few warnings when building kernel with W=1:
drivers/net/usb/lan78xx.c:1182:6: warning: no previous prototype for 'lan78xx_defer_kevent' [-Wmissing-prototypes]
drivers/net/usb/lan78xx.c:1409:5: warning: no previous prototype for 'lan78xx_nway_reset' [-Wmissing-prototypes]
drivers/net/usb/lan78xx.c:2000:5: warning: no previous prototype for 'lan78xx_set_mac_addr' [-Wmissing-prototypes]
....

In fact, these functions are only used in the file in which they are
declared and don't need a declaration, but can be made static.
so this patch marks these functions with 'static'.

Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'qed-get_regs'
David S. Miller [Tue, 6 Sep 2016 21:24:02 +0000 (14:24 -0700)]
Merge branch 'qed-get_regs'

8 years agoqed: Add infrastructure for debug data collection
Tomer Tayar [Mon, 5 Sep 2016 11:35:10 +0000 (14:35 +0300)]
qed: Add infrastructure for debug data collection

Adds support for several infrastructure operations that are done as part of
debug data collection.

Signed-off-by: Tomer Tayar <Tomer.Tayar@qlogic.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobnx2x: Add support for segmentation of tunnels with outer checksums
Alexander Duyck [Mon, 5 Sep 2016 10:26:33 +0000 (13:26 +0300)]
bnx2x: Add support for segmentation of tunnels with outer checksums

Signed-off-by: Alexander Duyck <aduyck@mirantis.com>
Tested-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoqed: Remove OOM messages
Joe Perches [Sun, 4 Sep 2016 21:24:03 +0000 (14:24 -0700)]
qed: Remove OOM messages

These messages are unnecessary as OOM allocation failures already do
a dump_stack() giving more or less the same information.

$ size drivers/net/ethernet/qlogic/qed/built-in.o* (defconfig x86-64)
   text    data     bss     dec     hex filename
 127817   27969   32800  188586   2e0aa drivers/net/ethernet/qlogic/qed/built-in.o.new
 132474   27969   32800  193243   2f2db drivers/net/ethernet/qlogic/qed/built-in.o.old

Miscellanea:

o Change allocs to the generally preferred forms where possible.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge tag 'rxrpc-rewrite-20160904-2' of git://git.kernel.org/pub/scm/linux/kernel...
David S. Miller [Tue, 6 Sep 2016 20:53:29 +0000 (13:53 -0700)]
Merge tag 'rxrpc-rewrite-20160904-2' of git://git./linux/kernel/git/dhowells/linux-fs

David Howells says:

====================
rxrpc: Split output code from sendmsg code

Here's a set of small patches that split the packet transmission code from
the sendmsg code and simply rearrange the new file to make it more
logically laid out ready for being rewritten.  An enum is also moved out of
the header file to there as it's only used there.  This needs to be applied
on top of the just-posted fixes patch set.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge tag 'rxrpc-rewrite-20160904-1' of git://git.kernel.org/pub/scm/linux/kernel...
David S. Miller [Tue, 6 Sep 2016 20:46:26 +0000 (13:46 -0700)]
Merge tag 'rxrpc-rewrite-20160904-1' of git://git./linux/kernel/git/dhowells/linux-fs

David Howells says:

====================
rxrpc: Small fixes

Here's a set of small fix patches:

 (1) Fix some uninitialised variables.

 (2) Set the client call state before making it live by attaching it to the
     conn struct.

 (3) Randomise the epoch and starting client conn ID values, and don't
     change the epoch when the client conn ID rolls round.

 (4) Replace deprecated create_singlethread_workqueue() calls.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agovxlan: Update tx_errors statistics if vxlan_build_skb return err.
Haishuang Yan [Sun, 4 Sep 2016 10:52:51 +0000 (18:52 +0800)]
vxlan: Update tx_errors statistics if vxlan_build_skb return err.

If vxlan_build_skb return err < 0, tx_errors should be also increased.

Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>
Acked-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet/mlx4_en: protect ring->xdp_prog with rcu_read_lock
Brenden Blanco [Sun, 4 Sep 2016 04:29:58 +0000 (21:29 -0700)]
net/mlx4_en: protect ring->xdp_prog with rcu_read_lock

Depending on the preempt mode, the bpf_prog stored in xdp_prog may be
freed despite the use of call_rcu inside bpf_prog_put. The situation is
possible when running in PREEMPT_RCU=y mode, for instance, since the rcu
callback for destroying the bpf prog can run even during the bh handling
in the mlx4 rx path.

Several options were considered before this patch was settled on:

Add a napi_synchronize loop in mlx4_xdp_set, which would occur after all
of the rings are updated with the new program.
This approach has the disadvantage that as the number of rings
increases, the speed of update will slow down significantly due to
napi_synchronize's msleep(1).

Add a new rcu_head in bpf_prog_aux, to be used by a new bpf_prog_put_bh.
The action of the bpf_prog_put_bh would be to then call bpf_prog_put
later. Those drivers that consume a bpf prog in a bh context (like mlx4)
would then use the bpf_prog_put_bh instead when the ring is up. This has
the problem of complexity, in maintaining proper refcnts and rcu lists,
and would likely be harder to review. In addition, this approach to
freeing must be exclusive with other frees of the bpf prog, for instance
a _bh prog must not be referenced from a prog array that is consumed by
a non-_bh prog.

The placement of rcu_read_lock in this patch is functionally the same as
putting an rcu_read_lock in napi_poll. Actually doing so could be a
potentially controversial change, but would bring the implementation in
line with sk_busy_loop (though of course the nature of those two paths
is substantially different), and would also avoid future copy/paste
problems with future supporters of XDP. Still, this patch does not take
that opinionated option.

Testing was done with kernels in either PREEMPT_RCU=y or
CONFIG_PREEMPT_VOLUNTARY=y+PREEMPT_RCU=n modes, with neither exhibiting
any drawback. With PREEMPT_RCU=n, the extra call to rcu_read_lock did
not show up in the perf report whatsoever, and with PREEMPT_RCU=y the
overhead of rcu_read_lock (according to perf) was the same before/after.
In the rx path, rcu_read_lock is eventually called for every packet
from netif_receive_skb_internal, so the napi poll call's rcu_read_lock
is easily amortized.

v2:
Remove extra rcu_read_lock in mlx4_en_process_rx_cq body
Annotate xdp_prog with __rcu, and convert all usages to rcu_assign or
rcu_dereference[_protected] as appropriate.
Add explicit mutex lock around rcu_assign instead of xchg loop.

Fixes: d576acf0a22 ("net/mlx4_en: add page recycle to prepare rx ring for tx support")
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'mediatek-rx-path-enhancements'
David S. Miller [Tue, 6 Sep 2016 20:33:20 +0000 (13:33 -0700)]
Merge branch 'mediatek-rx-path-enhancements'

Sean Wang says:

====================
net: ethernet: mediatek: add enhancements to RX path

Changes since v1:
- fix message typos and add coverletter

Changes since v2:
- split from the previous series for submitting add enhancements as
a series targeting 'net-next' and add indents before comments.

Changes since v3:
- merge the patch using PDMA RX path
- fixed the input of mtk_poll_rx is with the remaining budget

Changes since v4:
- save one wmb and register update when no packet is being handled
inside mtk_poll_rx call
- fixed incorrect return packet count from mtk_napi_rx
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: ethernet: mediatek: enhance RX path by aggregating more SKBs into NAPI
Sean Wang [Sat, 3 Sep 2016 09:59:27 +0000 (17:59 +0800)]
net: ethernet: mediatek: enhance RX path by aggregating more SKBs into NAPI

The patch adds support for aggregating more SKBs feed into NAPI in
order to get more benefits from generic receive offload (GRO) by
peeking at the RX ring status and moving more packets right before
returning from NAPI RX polling handler if NAPI budgets are still
available and some packets already present in hardware.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: ethernet: mediatek: enhance RX path by reducing the frequency of the memory...
Sean Wang [Sat, 3 Sep 2016 09:59:26 +0000 (17:59 +0800)]
net: ethernet: mediatek: enhance RX path by reducing the frequency of the memory barrier used

The patch makes move wmb() to outside the loop that could help
RX path handling more faster although that RX descriptors aren't
freed for DMA to use as soon as possible, but based on my experiment
and the result shows it still can reach about 943Mbpis without
performance drop that is tested based on the setup with one port
using Giga PHY and 256 RX descriptors for DMA to move.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'hso-neatening'
David S. Miller [Tue, 6 Sep 2016 20:29:59 +0000 (13:29 -0700)]
Merge branch 'hso-neatening'

Joe Perches says:

====================
hso: neatening

This seems to be the only code in the kernel that uses
macro defines with a trailing underscore.  Fix that.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agohso: Convert printk to pr_<level>
Joe Perches [Fri, 2 Sep 2016 22:58:02 +0000 (15:58 -0700)]
hso: Convert printk to pr_<level>

Use a more common logging style

Miscellanea:

o Add pr_fmt to prefix each output message
o Realign arguments

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agohso: Use a more common logging style
Joe Perches [Fri, 2 Sep 2016 22:58:01 +0000 (15:58 -0700)]
hso: Use a more common logging style

Macros that end in an underscore are just odd.
Add hso_dbg(level, fmt, ...) and use it everwhere instead.

Several uses had additional unnecessary newlines as the
macro added a newline.  Remove the newline from the macro
and add newlines to each use as appropriate.

Remove now unused D<digit> macros.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosmsc95xx: Add mdix control via ethtool
Woojung Huh [Fri, 2 Sep 2016 20:34:22 +0000 (20:34 +0000)]
smsc95xx: Add mdix control via ethtool

Add mdix control through ethtool.

Signed-off-by: Woojung Huh <Woojung.huh@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosmsc95xx: Add register define
Woojung Huh [Fri, 2 Sep 2016 20:34:20 +0000 (20:34 +0000)]
smsc95xx: Add register define

Add STRAP_STATUS defines.

Signed-off-by: Woojung Huh <Woojung.huh@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosmsc95xx: Add maintainer
Woojung Huh [Fri, 2 Sep 2016 20:34:19 +0000 (20:34 +0000)]
smsc95xx: Add maintainer

Add Microchip Linux Driver Support as maintainer
because this driver is maintaining by Microchip.

Signed-off-by: Woojung Huh <Woojung.huh@gmail.com>
Acked-by: Steve Glendinning <steve.glendinning@shawell.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'mv88e6xxx-isolate-Global2'
David S. Miller [Tue, 6 Sep 2016 19:58:14 +0000 (12:58 -0700)]
Merge branch 'mv88e6xxx-isolate-Global2'

Vivien Didelot says:

====================
net: dsa: mv88e6xxx: isolate Global2 support

Registers of Marvell chips are organized in internal SMI devices.

One of them at address 0x1C is called Global2. It provides an extended
set of registers, used for interrupt control, EEPROM access, indirect
PHY access (to bypass the PHY Polling Unit) and cross-chip setup.

Most chips have it, but some others don't (older ones such as 6060).

Now that its related code is isolated in mv88e6xxx_g2_* functions, move
it to its own global2.c file, making most of its setup code static.

Then make its compilation optional, which allows to reduce the size of
the mv88e6xxx driver for devices such as home routers embedding Ethernet
chips without Global2 support.

It is present on most recent chips, thus enable its support by default.

Changes in v2: fail probe if GLOBAL2 is required but not enabled.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: mv88e6xxx: make global2 code optional
Vivien Didelot [Fri, 2 Sep 2016 18:45:34 +0000 (14:45 -0400)]
net: dsa: mv88e6xxx: make global2 code optional

Since not every chip has a Global2 set of registers, make its support
optional, in which case the related functions will return -EOPNOTSUPP.

This also allows to reduce the size of the mv88e6xxx driver for devices
such as home routers embedding Ethernet chips without Global2 support.

It is present on most recent chips, thus enable its support by default.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: mv88e6xxx: move Global2 code
Vivien Didelot [Fri, 2 Sep 2016 18:45:33 +0000 (14:45 -0400)]
net: dsa: mv88e6xxx: move Global2 code

Marvell chips are composed of multiple SMI devices. One of them at
address 0x1C is called Global2. It provides an extended set of
registers, used for interrupt control, EEPROM access, indirect PHY
access (to bypass the PHY Polling Unit) and cross-chip related setup.

Most chips have it, but some others don't (older ones such as 6060).

Now that its related code is isolated in mv88e6xxx_g2_* functions, move
it to its own global2.c file, making most of its setup code static.
Document each registers in the meantime.

Its compilation can be later avoided for chips without such registers.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: mv88e6xxx: fix module naming
Vivien Didelot [Fri, 2 Sep 2016 18:45:32 +0000 (14:45 -0400)]
net: dsa: mv88e6xxx: fix module naming

Since the mv88e6xxx.c file has been renamed, the driver compiled as a
module is called chip.ko instead of mv88e6xxx.ko. Fix this.

Fixes: fad09c73c270 ("net: dsa: mv88e6xxx: rename single-chip support")
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next
David S. Miller [Tue, 6 Sep 2016 19:45:26 +0000 (12:45 -0700)]
Merge git://git./linux/kernel/git/pablo/nf-next

Pablo Neira Ayuso says:

====================
Netfilter updates for net-next

The following patchset contains Netfilter updates for your net-next
tree.  Most relevant updates are the removal of per-conntrack timers to
use a workqueue/garbage collection approach instead from Florian
Westphal, the hash and numgen expression for nf_tables from Laura
Garcia, updates on nf_tables hash set to honor the NLM_F_EXCL flag,
removal of ip_conntrack sysctl and many other incremental updates on our
Netfilter codebase.

More specifically, they are:

1) Retrieve only 4 bytes to fetch ports in case of non-linear skb
   transport area in dccp, sctp, tcp, udp and udplite protocol
   conntrackers, from Gao Feng.

2) Missing whitespace on error message in physdev match, from Hangbin Liu.

3) Skip redundant IPv4 checksum calculation in nf_dup_ipv4, from Liping Zhang.

4) Add nf_ct_expires() helper function and use it, from Florian Westphal.

5) Replace opencoded nf_ct_kill() call in IPVS conntrack support, also
   from Florian.

6) Rename nf_tables set implementation to nft_set_{name}.c

7) Introduce the hash expression to allow arbitrary hashing of selector
   concatenations, from Laura Garcia Liebana.

8) Remove ip_conntrack sysctl backward compatibility code, this code has
   been around for long time already, and we have two interfaces to do
   this already: nf_conntrack sysctl and ctnetlink.

9) Use nf_conntrack_get_ht() helper function whenever possible, instead
   of opencoding fetch of hashtable pointer and size, patch from Liping Zhang.

10) Add quota expression for nf_tables.

11) Add number generator expression for nf_tables, this supports
    incremental and random generators that can be combined with maps,
    very useful for load balancing purpose, again from Laura Garcia Liebana.

12) Fix a typo in a debug message in FTP conntrack helper, from Colin Ian King.

13) Introduce a nft_chain_parse_hook() helper function to parse chain hook
    configuration, this is used by a follow up patch to perform better chain
    update validation.

14) Add rhashtable_lookup_get_insert_key() to rhashtable and use it from the
    nft_set_hash implementation to honor the NLM_F_EXCL flag.

15) Missing nulls check in nf_conntrack from nf_conntrack_tuple_taken(),
    patch from Florian Westphal.

16) Don't use the DYING bit to know if the conntrack event has been already
    delivered, instead a state variable to track event re-delivery
    states, also from Florian.

17) Remove the per-conntrack timer, use the workqueue approach that was
    discussed during the NFWS, from Florian Westphal.

18) Use the netlink conntrack table dump path to kill stale entries,
    again from Florian.

19) Add a garbage collector to get rid of stale conntracks, from
    Florian.

20) Reschedule garbage collector if eviction rate is high.

21) Get rid of the __nf_ct_kill_acct() helper.

22) Use ARPHRD_ETHER instead of hardcoded 1 from ARP logger.

23) Make nf_log_set() interface assertive on unsupported families.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agorxrpc Move enum rxrpc_command to sendmsg.c
David Howells [Sun, 4 Sep 2016 12:25:21 +0000 (13:25 +0100)]
rxrpc Move enum rxrpc_command to sendmsg.c

Move enum rxrpc_command to sendmsg.c as it's now only used in that file.

Signed-off-by: David Howells <dhowells@redhat.com>
8 years agofs/afs/flock: Remove deprecated create_singlethread_workqueue
Bhaktipriya Shridhar [Sun, 4 Sep 2016 15:24:58 +0000 (20:54 +0530)]
fs/afs/flock: Remove deprecated create_singlethread_workqueue

The workqueue "afs_lock_manager" queues work item &vnode->lock_work,
per vnode. Since there can be multiple vnodes and since their work items
can be executed concurrently, alloc_workqueue has been used to replace
the deprecated create_singlethread_workqueue instance.

The WQ_MEM_RECLAIM flag has been set to ensure forward progress under
memory pressure because the workqueue is being used on a memory reclaim
path.

Since there are fixed number of work items, explicit concurrency
limit is unnecessary here.

Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
8 years agorxrpc: Rearrange net/rxrpc/sendmsg.c
David Howells [Fri, 2 Sep 2016 21:39:45 +0000 (22:39 +0100)]
rxrpc: Rearrange net/rxrpc/sendmsg.c

Rearrange net/rxrpc/sendmsg.c to be in a more logical order.  This makes it
easier to follow and eliminates forward declarations.

Signed-off-by: David Howells <dhowells@redhat.com>
8 years agofs/afs/callback: Remove deprecated create_singlethread_workqueue
Bhaktipriya Shridhar [Sun, 4 Sep 2016 15:24:11 +0000 (20:54 +0530)]
fs/afs/callback: Remove deprecated create_singlethread_workqueue

The workqueue "afs_callback_update_worker" queues multiple work items
viz  &vnode->cb_broken_work, &server->cb_break_work which require strict
execution ordering. Hence, an ordered dedicated workqueue has been used.

Since the workqueue is being used on a memory reclaim path, WQ_MEM_RECLAIM
has been set to ensure forward progress under memory pressure.

Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
8 years agorxrpc: Split sendmsg from packet transmission code
David Howells [Fri, 2 Sep 2016 21:39:45 +0000 (22:39 +0100)]
rxrpc: Split sendmsg from packet transmission code

Split the sendmsg code from the packet transmission code (mostly to be
found in output.c).

Signed-off-by: David Howells <dhowells@redhat.com>
8 years agofs/afs/rxrpc: Remove deprecated create_singlethread_workqueue
Bhaktipriya Shridhar [Sun, 4 Sep 2016 15:23:42 +0000 (20:53 +0530)]
fs/afs/rxrpc: Remove deprecated create_singlethread_workqueue

The workqueue "afs_async_calls" queues work item
&call->async_work per afs_call. Since there could be multiple calls and since
these calls can be run concurrently, alloc_workqueue has been used to replace
the deprecated create_singlethread_workqueue instance.

The WQ_MEM_RECLAIM flag has been set to ensure forward progress under
memory pressure because the workqueue is being used on a memory reclaim
path.

Since there are fixed number of work items, explicit concurrency
limit is unnecessary here.

Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
8 years agofs/afs/vlocation: Remove deprecated create_singlethread_workqueue
Bhaktipriya Shridhar [Sun, 4 Sep 2016 15:22:39 +0000 (20:52 +0530)]
fs/afs/vlocation: Remove deprecated create_singlethread_workqueue

The workqueue "afs_vlocation_update_worker" queues a single work item
&afs_vlocation_update and hence it doesn't require execution ordering.
Hence, alloc_workqueue has been used to replace the deprecated
create_singlethread_workqueue instance.

Since the workqueue is being used on a memory reclaim path, WQ_MEM_RECLAIM
flag has been set to ensure forward progress under memory pressure.

Since there are fixed number of work items, explicit concurrency
limit is unnecessary here.

Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
8 years agorxrpc: Don't change the epoch
David Howells [Sun, 4 Sep 2016 12:14:46 +0000 (13:14 +0100)]
rxrpc: Don't change the epoch

It seems the local epoch should only be changed on boot, so remove the code
that changes it for client connections.

Signed-off-by: David Howells <dhowells@redhat.com>
8 years agorxrpc: Randomise epoch and starting client conn ID values
David Howells [Fri, 2 Sep 2016 21:39:45 +0000 (22:39 +0100)]
rxrpc: Randomise epoch and starting client conn ID values

Create a random epoch value rather than a time-based one on startup and set
the top bit to indicate that this is the case.

Also create a random starting client connection ID value.  This will be
incremented from here as new client connections are created.

Signed-off-by: David Howells <dhowells@redhat.com>
8 years agonet: ti: cpmac: Fix compiler warning due to type confusion
Paul Burton [Fri, 2 Sep 2016 14:22:48 +0000 (15:22 +0100)]
net: ti: cpmac: Fix compiler warning due to type confusion

cpmac_start_xmit() used the max() macro on skb->len (an unsigned int)
and ETH_ZLEN (a signed int literal). This led to the following compiler
warning:

  In file included from include/linux/list.h:8:0,
                   from include/linux/module.h:9,
                   from drivers/net/ethernet/ti/cpmac.c:19:
  drivers/net/ethernet/ti/cpmac.c: In function 'cpmac_start_xmit':
  include/linux/kernel.h:748:17: warning: comparison of distinct pointer
  types lacks a cast
    (void) (&_max1 == &_max2);  \
                   ^
  drivers/net/ethernet/ti/cpmac.c:560:8: note: in expansion of macro 'max'
    len = max(skb->len, ETH_ZLEN);
          ^

On top of this, it assigned the result of the max() macro to a signed
integer whilst all further uses of it result in it being cast to varying
widths of unsigned integer.

Fix this up by using max_t to ensure the comparison is performed as
unsigned integers, and for consistency change the type of the len
variable to unsigned int.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agocxgb4: Add support for ndo_get_vf_config
Hariprasad Shenai [Fri, 2 Sep 2016 13:43:53 +0000 (19:13 +0530)]
cxgb4: Add support for ndo_get_vf_config

Adds support for ndo_get_vf_config, also fill the default mac address
that will be provided to the VF by firmware, in case user doesn't
provide one. So user can get the default MAC address address also
through ndo_get_vf_config.

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'netns-opt'
David S. Miller [Sun, 4 Sep 2016 18:39:59 +0000 (11:39 -0700)]
Merge branch 'netns-opt'

Cong Wang says:

====================
net: some minor optimization for netns id

Cong Wang (2):
  vxlan: call peernet2id() in fdb notification
  netns: avoid disabling irq for netns id
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonetns: avoid disabling irq for netns id
WANG Cong [Fri, 2 Sep 2016 04:53:45 +0000 (21:53 -0700)]
netns: avoid disabling irq for netns id

We never read or change netns id in hardirq context,
the only place we read netns id in softirq context
is in vxlan_xmit(). So, it should be enough to just
disable BH.

Cc: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agovxlan: call peernet2id() in fdb notification
WANG Cong [Fri, 2 Sep 2016 04:53:44 +0000 (21:53 -0700)]
vxlan: call peernet2id() in fdb notification

netns id should be already allocated each time we change
netns, that is, in dev_change_net_namespace() (more precisely
in rtnl_fill_ifinfo()). It is safe to just call peernet2id() here.

Cc: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoopenvswitch: Free tmpl with tmpl_free.
Joe Stringer [Fri, 2 Sep 2016 01:01:47 +0000 (18:01 -0700)]
openvswitch: Free tmpl with tmpl_free.

When an error occurs during conntrack template creation as part of
actions validation, we need to free the template. Previously we've been
using nf_ct_put() to do this, but nf_ct_tmpl_free() is more appropriate.

Signed-off-by: Joe Stringer <joe@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agorxrpc: The client call state must be changed before attachment to conn
David Howells [Sun, 4 Sep 2016 12:10:10 +0000 (13:10 +0100)]
rxrpc: The client call state must be changed before attachment to conn

We must set the client call state to RXRPC_CALL_CLIENT_SEND_REQUEST before
attaching the call to the connection struct, not after, as it's liable to
receive errors and conn aborts as soon as the assignment is made - and
these will cause its state to be changed outside of the initiating thread's
control.

Signed-off-by: David Howells <dhowells@redhat.com>
8 years agoMerge branch 'liquidio-CN23XX-part-2'
David S. Miller [Sat, 3 Sep 2016 00:11:32 +0000 (17:11 -0700)]
Merge branch 'liquidio-CN23XX-part-2'

Raghu Vatsavayi says:

====================
liquidio CN23XX support

I am posting the remaining half of patchset after the
acceptance of first half. With this patchset I am able
to completely submit the code of V3 patchset  which you
earlier advised me to split into smaller ones.

This V5 patch also addresses all the comments from previous
submission:
1) Avoid busy loop while reading registers.
2) Other minor comments about debug messages and constants.

Please apply patches in following order as some of the
patches depend on earlier patches.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoliquidio:CN23XX pause frame support
Raghu Vatsavayi [Thu, 1 Sep 2016 18:16:11 +0000 (11:16 -0700)]
liquidio:CN23XX pause frame support

Adds support for pause frame and priv flag for cn23xx
device.

Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com>
Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com>
Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoliquidio: CN23XX napi support
Raghu Vatsavayi [Thu, 1 Sep 2016 18:16:10 +0000 (11:16 -0700)]
liquidio: CN23XX napi support

This patch adds NAPI related support for cn23xx device.

Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com>
Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com>
Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoliquidio: CN23XX health monitoring
Raghu Vatsavayi [Thu, 1 Sep 2016 18:16:09 +0000 (11:16 -0700)]
liquidio: CN23XX health monitoring

Adds support for watchdog based health monitoring
of octeon cores on cn23xx device.

Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com>
Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com>
Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoliquidio: ethtool and led control support
Raghu Vatsavayi [Thu, 1 Sep 2016 18:16:08 +0000 (11:16 -0700)]
liquidio: ethtool and led control support

This patch adds support for some control operations like
LED identification, ethtool statistics and intr config for
cn23xx device.

Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com>
Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com>
Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoliquidio: CN23XX octeon3 instruction
Raghu Vatsavayi [Thu, 1 Sep 2016 18:16:07 +0000 (11:16 -0700)]
liquidio: CN23XX octeon3 instruction

Adds support for data path related changes based
on octeon3 instruction header(ih3) for cn23xx.

Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com>
Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com>
Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoliquidio: CN23XX IQ access
Raghu Vatsavayi [Thu, 1 Sep 2016 18:16:06 +0000 (11:16 -0700)]
liquidio: CN23XX IQ access

Adds support for Instruction Queue(IQ) index manipulation
routines through bar1 of cn23xx.

Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com>
Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com>
Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoliquidio: RX control commands
Raghu Vatsavayi [Thu, 1 Sep 2016 18:16:05 +0000 (11:16 -0700)]
liquidio: RX control commands

Adds support for RX control commands on cn23xx device.

Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com>
Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com>
Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoliquidio: link and control commands
Raghu Vatsavayi [Thu, 1 Sep 2016 18:16:04 +0000 (11:16 -0700)]
liquidio: link and control commands

This patch adds work queue support for link status and
control commands.

Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com>
Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com>
Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'tipc-scalable-broadcast-NACK'
David S. Miller [Sat, 3 Sep 2016 00:10:25 +0000 (17:10 -0700)]
Merge branch 'tipc-scalable-broadcast-NACK'

Jon Maloy says:

====================
tipc: improve broadcast NACK mechanism

The broadcast protocol has turned out to not scale well beyond 70-80
nodes, while it is now possible to build TIPC clusters of at least ten
times that size. This commit series improves the NACK/retransmission
mechanism of the broadcast protocol to make is at scalable as the rest
of TIPC.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agotipc: send broadcast nack directly upon sequence gap detection
Jon Paul Maloy [Thu, 1 Sep 2016 17:52:51 +0000 (13:52 -0400)]
tipc: send broadcast nack directly upon sequence gap detection

Because of the risk of an excessive number of NACK messages and
retransissions, receivers have until now abstained from sending
broadcast NACKS directly upon detection of a packet sequence number
gap. We have instead relied on such gaps being detected by link
protocol STATE message exchange, something that by necessity delays
such detection and subsequent retransmissions.

With the introduction of unicast NACK transmission and rate control
of retransmissions we can now remove this limitation. We now allow
receiving nodes to send NACKS immediately, while coordinating the
permission to do so among the nodes in order to avoid NACK storms.

Reviewed-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>
8 years agotipc: rate limit broadcast retransmissions
Jon Paul Maloy [Thu, 1 Sep 2016 17:52:50 +0000 (13:52 -0400)]
tipc: rate limit broadcast retransmissions

As cluster sizes grow, so does the amount of identical or overlapping
broadcast NACKs generated by the packet receivers. This often leads to
'NACK crunches' resulting in huge numbers of redundant retransmissions
of the same packet ranges.

In this commit, we introduce rate control of broadcast retransmissions,
so that a retransmitted range cannot be retransmitted again until after
at least 10 ms. This reduces the frequency of duplicate, redundant
retransmissions by an order of magnitude, while having a significant
positive impact on overall throughput and scalability.

Reviewed-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>
8 years agotipc: transfer broadcast nacks in link state messages
Jon Paul Maloy [Thu, 1 Sep 2016 17:52:49 +0000 (13:52 -0400)]
tipc: transfer broadcast nacks in link state messages

When we send broadcasts in clusters of more 70-80 nodes, we sometimes
see the broadcast link resetting because of an excessive number of
retransmissions. This is caused by a combination of two factors:

1) A 'NACK crunch", where loss of broadcast packets is discovered
   and NACK'ed by several nodes simultaneously, leading to multiple
   redundant broadcast retransmissions.

2) The fact that the NACKS as such also are sent as broadcast, leading
   to excessive load and packet loss on the transmitting switch/bridge.

This commit deals with the latter problem, by moving sending of
broadcast nacks from the dedicated BCAST_PROTOCOL/NACK message type
to regular unicast LINK_PROTOCOL/STATE messages. We allocate 10 unused
bits in word 8 of the said message for this purpose, and introduce a
new capability bit, TIPC_BCAST_STATE_NACK in order to keep the change
backwards compatible.

Reviewed-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>
8 years agonet: stmmac: dwmac-rk: add pd_gmac support for rk3399
David Wu [Thu, 1 Sep 2016 17:50:01 +0000 (01:50 +0800)]
net: stmmac: dwmac-rk: add pd_gmac support for rk3399

Add the gmac power domain support for rk3399, in order to save more
power consumption.

Signed-off-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: stmmac: dwmac-rk: fixes the gmac resume after PD on/off
Roger Chen [Thu, 1 Sep 2016 17:50:00 +0000 (01:50 +0800)]
net: stmmac: dwmac-rk: fixes the gmac resume after PD on/off

GMAC Power Domain(PD) will be disabled during suspend.
That will causes GRF registers reset.
So corresponding GRF registers for GMAC must be setup again.

Signed-off-by: Roger Chen <roger.chen@rock-chips.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: stmmac: dwmac-rk: add rk3366 & rk3399 specific data
Roger Chen [Thu, 1 Sep 2016 17:49:59 +0000 (01:49 +0800)]
net: stmmac: dwmac-rk: add rk3366 & rk3399 specific data

Add constants and callback functions for the dwmac on rk3228/rk3229 socs.
As can be seen, the base structure is the same, only registers and the
bits in them moved slightly.

Signed-off-by: Roger Chen <roger.chen@rock-chips.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agorxrpc: Fix uninitialised variable warning
David Howells [Fri, 2 Sep 2016 21:39:44 +0000 (22:39 +0100)]
rxrpc: Fix uninitialised variable warning

Fix the following uninitialised variable warning:

../net/rxrpc/call_event.c: In function 'rxrpc_process_call':
../net/rxrpc/call_event.c:879:58: warning: 'error' may be used uninitialized in this function [-Wmaybe-uninitialized]
    _debug("post net error %d", error);
                                                          ^

Signed-off-by: David Howells <dhowells@redhat.com>
8 years agorxrpc: fix undefined behavior in rxrpc_mark_call_released
Arnd Bergmann [Fri, 2 Sep 2016 21:39:44 +0000 (22:39 +0100)]
rxrpc: fix undefined behavior in rxrpc_mark_call_released

gcc -Wmaybe-initialized correctly points out a newly introduced bug
through which we can end up calling rxrpc_queue_call() for a dead
connection:

net/rxrpc/call_object.c: In function 'rxrpc_mark_call_released':
net/rxrpc/call_object.c:600:5: error: 'sched' may be used uninitialized in this function [-Werror=maybe-uninitialized]

This sets the 'sched' variable to zero to restore the previous
behavior.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: f5c17aaeb2ae ("rxrpc: Calls should only have one terminal state")
Signed-off-by: David Howells <dhowells@redhat.com>
8 years agoswitchdev: Fix return value of switchdev_port_fdb_dump().
Rosen, Rami [Fri, 2 Sep 2016 11:11:57 +0000 (14:11 +0300)]
switchdev: Fix return value of switchdev_port_fdb_dump().

This patch fixes the retun value of switchdev_port_fdb_dump() when
CONFIG_NET_SWITCHDEV is not set. This avoids getting "warning: return makes
integer from pointer without a cast [-Wint-conversion]" when building
when CONFIG_NET_SWITCHDEV is not set under several compiler versions.
This warning is due to commit d297653dd6f07afbe7e6c702a4bcd7615680002e
("rtnetlink: fdb dump: optimize by saving last interface markers").

Signed-off-by: Rami Rosen <rami.rosen@intel.com>
Acked-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'bpf-perf-hw-sw-events'
David S. Miller [Fri, 2 Sep 2016 17:46:45 +0000 (10:46 -0700)]
Merge branch 'bpf-perf-hw-sw-events'

Alexei Starovoitov says:

====================
perf, bpf: add support for bpf in sw/hw perf_events

this patch set is a follow up to the discussion:
https://lkml.kernel.org/r/20160804142853.GO6862%20()%20twins%20!%20programming%20!%20kicks-ass%20!%20net
It turned out to be simpler than what we discussed.

Patches 1-3 is bpf-side prep for the main patch 4
that adds bpf program as an overflow_handler to sw and hw perf_events.

Patches 5 and 6 are examples from myself and Brendan.

Peter,
to implement your suggestion to add ifdef CONFIG_BPF_SYSCALL
inside struct perf_event, I had to shuffle ifdefs in events/core.c
Please double check whether that is what you wanted to see.

v2->v3: fixed few more minor issues
v1->v2: fixed issues spotted by Peter and Daniel.
====================

Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosamples/bpf: add sampleip example
Brendan Gregg [Fri, 2 Sep 2016 01:37:26 +0000 (18:37 -0700)]
samples/bpf: add sampleip example

sample instruction pointer and frequency count in a BPF map

Signed-off-by: Brendan Gregg <bgregg@netflix.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosamples/bpf: add perf_event+bpf example
Alexei Starovoitov [Fri, 2 Sep 2016 01:37:25 +0000 (18:37 -0700)]
samples/bpf: add perf_event+bpf example

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 process

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>