* Re: [PATCH bpf 1/2] bpf/test_run: fix unkillable BPF_PROG_TEST_RUN
From: Stanislav Fomichev @ 2019-02-18 17:29 UTC (permalink / raw)
To: Daniel Borkmann; +Cc: Stanislav Fomichev, netdev, davem, ast, syzbot
In-Reply-To: <74457479-d54c-69fa-958a-3cfb1ee9e5a2@iogearbox.net>
On 02/16, Daniel Borkmann wrote:
> On 02/13/2019 12:42 AM, Stanislav Fomichev wrote:
> > Syzbot found out that running BPF_PROG_TEST_RUN with repeat=0xffffffff
> > makes process unkillable. The problem is that when CONFIG_PREEMPT is
> > enabled, we never see need_resched() return true. This is due to the
> > fact that preempt_enable() (which we do in bpf_test_run_one on each
> > iteration) now handles resched if it's needed.
> >
> > Let's disable preemption for the whole run, not per test. In this case
> > we can properly see whether resched is needed.
> > Let's also properly return -EINTR to the userspace in case of a signal
> > interrupt.
> >
> > See recent discussion:
> > http://lore.kernel.org/netdev/CAH3MdRWHr4N8jei8jxDppXjmw-Nw=puNDLbu1dQOFQHxfU2onA@mail.gmail.com
> >
> > I'll follow up with the same fix bpf_prog_test_run_flow_dissector in
> > bpf-next.
> >
> > Reported-by: syzbot <syzkaller@googlegroups.com>
> > Signed-off-by: Stanislav Fomichev <sdf@google.com>
> > ---
> > net/bpf/test_run.c | 45 ++++++++++++++++++++++++---------------------
> > 1 file changed, 24 insertions(+), 21 deletions(-)
> >
> > diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c
> > index fa2644d276ef..e31e1b20f7f4 100644
> > --- a/net/bpf/test_run.c
> > +++ b/net/bpf/test_run.c
> > @@ -13,27 +13,13 @@
> > #include <net/sock.h>
> > #include <net/tcp.h>
> >
> > -static __always_inline u32 bpf_test_run_one(struct bpf_prog *prog, void *ctx,
> > - struct bpf_cgroup_storage *storage[MAX_BPF_CGROUP_STORAGE_TYPE])
> > -{
> > - u32 ret;
> > -
> > - preempt_disable();
> > - rcu_read_lock();
> > - bpf_cgroup_storage_set(storage);
> > - ret = BPF_PROG_RUN(prog, ctx);
> > - rcu_read_unlock();
> > - preempt_enable();
> > -
> > - return ret;
> > -}
> > -
> > -static int bpf_test_run(struct bpf_prog *prog, void *ctx, u32 repeat, u32 *ret,
> > - u32 *time)
> > +static int bpf_test_run(struct bpf_prog *prog, void *ctx, u32 repeat,
> > + u32 *retval, u32 *time)
> > {
> > struct bpf_cgroup_storage *storage[MAX_BPF_CGROUP_STORAGE_TYPE] = { 0 };
> > enum bpf_cgroup_storage_type stype;
> > u64 time_start, time_spent = 0;
> > + int ret = 0;
> > u32 i;
> >
> > for_each_cgroup_storage_type(stype) {
> > @@ -48,25 +34,42 @@ static int bpf_test_run(struct bpf_prog *prog, void *ctx, u32 repeat, u32 *ret,
> >
> > if (!repeat)
> > repeat = 1;
> > +
> > + rcu_read_lock();
> > + preempt_disable();
> > time_start = ktime_get_ns();
> > for (i = 0; i < repeat; i++) {
> > - *ret = bpf_test_run_one(prog, ctx, storage);
> > + bpf_cgroup_storage_set(storage);
> > + *retval = BPF_PROG_RUN(prog, ctx);
> > +
> > + if (signal_pending(current)) {
> > + ret = -EINTR;
> > + break;
> > + }
>
> Wouldn't it be enough to just move the signal_pending() test to
> the above as you did to actually fix the unkillable issue? For
> CONFIG_PREEMPT the below need_resched() is never triggered as you
> mention as preempt_enable() handles rescheduling internally in
> this situation, so moving it only out should suffice.
>
> The rationale for disabling preemption for the whole run is imho
> a bit different, namely that you would not screw up the ktime
> measurements due to rescheduling happening in between otherwise.
That's exactly the reason why we need to preempt_disable() the whole
run; we can't preempt on preempt_enable(), it would screw up our
ktime estimation.
> But then, once preemption is disabled for the whole run, is there
> a need to move out the extra signal_pending() test (presumably as
> need_resched() does not handle TIF_SIGPENDING but only TIF_NEED_RESCHED
> but we still wouldn't get into a unkillable situation here, no)?
I'm not sure, they look like two separate flags, it feels safer to handle
them separately (and we have a precedent in do_check in verifier.c). While
we do set them both when sending signal, it looks like need_resched is
for the cases where we wake up a task with a higher priority. So, in
theory, we can have a signal_pending without need_resched. (Also, with
CONFIG_PREEMT=y kernel, there is another complication with
preempt_count()).
>
> > if (need_resched()) {
> > - if (signal_pending(current))
> > - break;
> > time_spent += ktime_get_ns() - time_start;
> > + preempt_enable();
> > + rcu_read_unlock();
> > +
> > cond_resched();
> > +
> > + rcu_read_lock();
> > + preempt_disable();
> > time_start = ktime_get_ns();
> > }
> > }
> > time_spent += ktime_get_ns() - time_start;
> > + preempt_enable();
> > + rcu_read_unlock();
> > +
> > do_div(time_spent, repeat);
> > *time = time_spent > U32_MAX ? U32_MAX : (u32)time_spent;
> >
> > for_each_cgroup_storage_type(stype)
> > bpf_cgroup_storage_free(storage[stype]);
> >
> > - return 0;
> > + return ret;
> > }
> >
> > static int bpf_test_finish(const union bpf_attr *kattr,
> >
>
^ permalink raw reply
* [PATCH net] net: hns: Fixes the missing put_device in positive leg for roce reset
From: Salil Mehta @ 2019-02-18 17:40 UTC (permalink / raw)
To: davem
Cc: salil.mehta, yisen.zhuang, lipeng321, mehta.salil, netdev,
linux-kernel, linux-rdma, linuxarm
This patch fixes the missing device reference release-after-use in
the positive leg of the roce reset API of the HNS DSAF.
Fixes: c969c6e7ab8c ("net: hns: Fix object reference leaks in hns_dsaf_roce_reset()")
Reported-by: John Garry <john.garry@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
---
drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c
index b8155f5..ac55db0 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c
@@ -3128,6 +3128,9 @@ int hns_dsaf_roce_reset(struct fwnode_handle *dsaf_fwnode, bool dereset)
dsaf_set_bit(credit, DSAF_SBM_ROCEE_CFG_CRD_EN_B, 1);
dsaf_write_dev(dsaf_dev, DSAF_SBM_ROCEE_CFG_REG_REG, credit);
}
+
+ put_device(&pdev->dev);
+
return 0;
}
EXPORT_SYMBOL(hns_dsaf_roce_reset);
--
2.7.4
^ permalink raw reply related
* Re: -Wimplicit-fallthrough not working with ccache
From: Gustavo A. R. Silva @ 2019-02-18 17:49 UTC (permalink / raw)
To: Kalle Valo
Cc: netdev, linux-wireless, linux-kernel, ath10k, David S. Miller,
linux-kbuild, Kees Cook
In-Reply-To: <87zhqwuggt.fsf_-_@kamboji.qca.qualcomm.com>
Hi Kalle,
On 2/16/19 5:21 AM, Kalle Valo wrote:
> (replying to an old thread but renaming it)
>
> Kalle Valo <kvalo@codeaurora.org> writes:
>
>> "Gustavo A. R. Silva" <gustavo@embeddedor.com> wrote:
>>
>>> In preparation to enabling -Wimplicit-fallthrough, mark switch cases
>>> where we are expecting to fall through.
>>>
>>> Notice that in this particular case, I replaced "pass through" with
>>> a proper "fall through" comment, which is what GCC is expecting
>>> to find.
>>>
>>> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
>>> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
>>
>> Patch applied to ath-next branch of ath.git, thanks.
>>
>> f1d270ae10ff ath10k: htt_tx: mark expected switch fall-throughs
>
> Gustavo, I enabled W=1 on my ath10k build checks and it took me a while
> to figure out why GCC was warning about fall through annotations missing
> even I knew you had fixed them. Finally I figured out that the reason
> was ccache, which I need because I work with different branches and need
> to recompile the kernel quite often.
>
> If the plan is to enable -Wimplicit-fallthrough by default in the kernel
> IMHO this might become an issue, as otherwise people using ccache start
> seeing lots of invalid warnings. Apparently CCACHE_COMMENTS=1 will fix
> that but my version of ccache doesn't support it, and how would everyone
> learn that trick anyway? Or maybe CCACHE_COMMENTS can enabled through
> kernel Makefile?
>
Can you share with me the warning messages you get?
I just see the following warnings with linux-next:
$ make CC="ccache gcc" W=1 drivers/net/wireless/ath/ath10k/htt_tx.o
CC [M] drivers/net/wireless/ath/ath10k/htt_tx.o
In file included from drivers/net/wireless/ath/ath10k/htt_tx.c:19:
drivers/net/wireless/ath/ath10k/htt.h:1727:1: warning: alignment 1 of ‘struct ath10k_htt_txbuf_32’ is less than 4 [-Wpacked-not-aligned]
} __packed;
^
drivers/net/wireless/ath/ath10k/htt.h:1734:1: warning: alignment 1 of ‘struct ath10k_htt_txbuf_64’ is less than 4 [-Wpacked-not-aligned]
} __packed;
^
In my Makefile I have:
KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough=3,)
Thanks
--
Gustavo
^ permalink raw reply
* RE: [PATCH] net: hns: Fix object reference leaks in hns_dsaf_roce_reset()
From: Salil Mehta @ 2019-02-18 17:54 UTC (permalink / raw)
To: John Garry, Huang Zijiang, Zhuangyuzeng (Yisen)
Cc: davem@davemloft.net, lipeng (Y), liuyonglong, yuehaibing,
keescook@chromium.org, wangxi (M), netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, wang.yi59@zte.com.cn, Linuxarm
In-Reply-To: <4ca251e6-22a1-a792-bb64-2498d8cb6fcd@huawei.com>
> From: John Garry
> Sent: Friday, February 15, 2019 12:00 PM
>
> On 15/02/2019 11:25, Salil Mehta wrote:
> >> From: John Garry
> >> Sent: Friday, February 15, 2019 10:52 AM
> >>
> >> On 14/02/2019 06:41, Huang Zijiang wrote:
> >>> The of_find_device_by_node() takes a reference to the underlying device
> >>> structure, we should release that reference.
> >>
> >> of_find_device_by_node() is not called for every path, so is this change proper:
> >
> >
> > It looks okay to me and with the suggested device reference is being
> > released from every possible error leg in the function. Could you be
> > more specific which error path is not being addressed?
> >
> >> /* find the platform device corresponding to fwnode */
> >> if (is_of_node(dsaf_fwnode)) {
> >> pdev = of_find_device_by_node(to_of_node(dsaf_fwnode));
> >
> >
> > This will get the reference to the device, which needs to be
> > released later.
> >
> >
> >> } else if (is_acpi_device_node(dsaf_fwnode)) {
> >> pdev = hns_dsaf_find_platform_device(dsaf_fwnode);
> >
> >
> > This will also get the reference to the device when bus_find_device()
> > gets called and returns the 'device'. Therefore, this needs to be
> > released as well using put_device()
>
> OK, I see. That's non-obvious.
>
> And so the commit message was simply incomplete.
>
> So who finally drops this reference? This patch only seems to release on
> error path. I checked the callers and they don't seem to.
Yes, in the positive leg the put_device() was missing. Thanks for identifying!
I have floated the patch to fix it https://www.lkml.org/lkml/2019/2/18/1161
Salil.
^ permalink raw reply
* [PATCH RFC] net-sysfs: consistent behavior between ioctl and sysfs
From: Julius Niedworok @ 2019-02-18 18:02 UTC (permalink / raw)
To: netdev
Cc: julius.n, ga58taw, David S. Miller, Alexander Duyck, Tyler Hicks,
Amritha Nambiar, Jeff Kirsher, Petr Machata, Dmitry Torokhov,
Joe Perches, linux-kernel
The flags of a network interface can be read either from
/sys/class/net/<dev>/flags or from the ioctl SIOCGIFFLAGS. When the ioctl
is used, dev_get_flags is called to extract the flags. However, reads on
the sysfs file return the plain content of the flags integer and do not
call dev_get_flags.
In order to fix this inconsistent behavior, replace the NETDEVICE_SHOW_RW
macro by the functions format_flags and flags_show. These functions extract
the flags by calling dev_get_flags and return them formatted for the user.
This makes the behavior between calling the SIOCGIFFLAGS ioctl and reading
/sys/class/net/<dev>/flags consistent.
Co-developed-by: Charlie Groh <ga58taw@mytum.de>
Signed-off-by: Charlie Groh <ga58taw@mytum.de>
Signed-off-by: Julius Niedworok <julius.n@gmx.net>
---
net/core/net-sysfs.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index ff9fd2b..8ae8be5 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -345,7 +345,19 @@ static ssize_t flags_store(struct device *dev, struct device_attribute *attr,
{
return netdev_store(dev, attr, buf, len, change_flags);
}
-NETDEVICE_SHOW_RW(flags, fmt_hex);
+
+static ssize_t format_flags(const struct net_device *dev, char *buf)
+{
+ return sprintf(buf, fmt_hex, dev_get_flags(dev));
+}
+
+static ssize_t flags_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return netdev_show(dev, attr, buf, format_flags);
+}
+static DEVICE_ATTR_RW(flags);
static ssize_t tx_queue_len_store(struct device *dev,
struct device_attribute *attr,
--
2.10.1 (Apple Git-78)
^ permalink raw reply related
* Re: stmmac / meson8b-dwmac
From: Simon Huelck @ 2019-02-18 18:05 UTC (permalink / raw)
To: Jose Abreu, Martin Blumenstingl
Cc: Emiliano Ingrassia, Gpeppe.cavallaro, alexandre.torgue,
linux-amlogic, netdev
In-Reply-To: <adafe6d7-e619-45e9-7ecb-76f003b0c7d9@synopsys.com>
[-- Attachment #1: Type: text/plain, Size: 2787 bytes --]
Am 18.02.2019 um 18:05 schrieb Jose Abreu:
> On 2/18/2019 4:51 PM, Simon Huelck wrote:
>> Hi,
>>
>> no im testing vanilla mainline kernel and against 4.14. where
>> performance was ok. but turning off EEE via ethtool should have same
>> results than removal of that patch.
>>
>> But, since it was mainlined recently , not long ago, i think this was
>> tested ??
> The thing is that phy_init_eee() is called by stmmac and this
> function does not take into account the broken modes if it's
> called too early which will cause driver to enable LPI in MAC.
>
> And anyway, if you have lpi values in the ethtool stats then EEE
> is being enabled by stmmac.
>
> Please try the change I suggested.
>
> Thanks,
> Jose Miguel Abreu
Hi,
disabling EEE doesnt help ( did it via the entry in the .dtb / .dts ),
the results are the same. I can confirm the LPI counters are zero or one
only after the test.....
C:\Users\Simon\Downloads\iperf-2.0.9-win64>iperf -c 10.10.11.1 -i1 -d
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 208 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to 10.10.11.1, TCP port 5001
TCP window size: 208 KByte (default)
------------------------------------------------------------
[ 4] local 10.10.11.100 port 56114 connected with 10.10.11.1 port 5001
[ 5] local 10.10.11.100 port 5001 connected with 10.10.11.1 port 47866
[ ID] Interval Transfer Bandwidth
[ 4] 0.0- 1.0 sec 20.1 MBytes 169 Mbits/sec
[ 5] 0.0- 1.0 sec 75.8 MBytes 635 Mbits/sec
[ 4] 1.0- 2.0 sec 18.1 MBytes 152 Mbits/sec
[ 5] 1.0- 2.0 sec 69.0 MBytes 579 Mbits/sec
[ 4] 2.0- 3.0 sec 15.6 MBytes 131 Mbits/sec
[ 5] 2.0- 3.0 sec 70.7 MBytes 593 Mbits/sec
[ 4] 3.0- 4.0 sec 15.9 MBytes 133 Mbits/sec
[ 5] 3.0- 4.0 sec 70.3 MBytes 590 Mbits/sec
[ 4] 4.0- 5.0 sec 16.4 MBytes 137 Mbits/sec
[ 5] 4.0- 5.0 sec 69.5 MBytes 583 Mbits/sec
[ 4] 5.0- 6.0 sec 16.5 MBytes 138 Mbits/sec
[ 5] 5.0- 6.0 sec 69.0 MBytes 579 Mbits/sec
[ 4] 6.0- 7.0 sec 18.2 MBytes 153 Mbits/sec
[ 5] 6.0- 7.0 sec 69.8 MBytes 585 Mbits/sec
[ 4] 7.0- 8.0 sec 15.6 MBytes 131 Mbits/sec
[ 5] 7.0- 8.0 sec 70.0 MBytes 587 Mbits/sec
[ 4] 8.0- 9.0 sec 16.2 MBytes 136 Mbits/sec
[ 5] 8.0- 9.0 sec 69.6 MBytes 583 Mbits/sec
[ 4] 9.0-10.0 sec 17.1 MBytes 144 Mbits/sec
[ 4] 0.0-10.0 sec 170 MBytes 142 Mbits/sec
[ 5] 9.0-10.0 sec 69.1 MBytes 580 Mbits/sec
[ 5] 0.0-10.0 sec 703 MBytes 589 Mbits/sec
regards,
Simon
[-- Attachment #2: ethtool_test2.txt --]
[-- Type: text/plain, Size: 5373 bytes --]
NIC statistics:
mmc_tx_octetcount_gb: 0
mmc_tx_framecount_gb: 0
mmc_tx_broadcastframe_g: 0
mmc_tx_multicastframe_g: 0
mmc_tx_64_octets_gb: 0
mmc_tx_65_to_127_octets_gb: 0
mmc_tx_128_to_255_octets_gb: 0
mmc_tx_256_to_511_octets_gb: 0
mmc_tx_512_to_1023_octets_gb: 0
mmc_tx_1024_to_max_octets_gb: 0
mmc_tx_unicast_gb: 0
mmc_tx_multicast_gb: 0
mmc_tx_broadcast_gb: 0
mmc_tx_underflow_error: 0
mmc_tx_singlecol_g: 0
mmc_tx_multicol_g: 0
mmc_tx_deferred: 0
mmc_tx_latecol: 0
mmc_tx_exesscol: 0
mmc_tx_carrier_error: 0
mmc_tx_octetcount_g: 0
mmc_tx_framecount_g: 0
mmc_tx_excessdef: 0
mmc_tx_pause_frame: 0
mmc_tx_vlan_frame_g: 0
mmc_rx_framecount_gb: 2348653
mmc_rx_octetcount_gb: 3299190414
mmc_rx_octetcount_g: 3299190413
mmc_rx_broadcastframe_g: 92816
mmc_rx_multicastframe_g: 249
mmc_rx_crc_error: 2
mmc_rx_align_error: 0
mmc_rx_run_error: 2
mmc_rx_jabber_error: 0
mmc_rx_undersize_g: 0
mmc_rx_oversize_g: 0
mmc_rx_64_octets_gb: 0
mmc_rx_65_to_127_octets_gb: 172809
mmc_rx_128_to_255_octets_gb: 15902
mmc_rx_256_to_511_octets_gb: 659
mmc_rx_512_to_1023_octets_gb: 370
mmc_rx_1024_to_max_octets_gb: 2158911
mmc_rx_unicast_g: 2255586
mmc_rx_length_error: 2
mmc_rx_autofrangetype: 0
mmc_rx_pause_frames: 0
mmc_rx_fifo_overflow: 2924
mmc_rx_vlan_frames_gb: 2348591
mmc_rx_watchdog_error: 0
mmc_rx_ipc_intr_mask: 4294377460
mmc_rx_ipc_intr: 0
mmc_rx_ipv4_gd: 2255929
mmc_rx_ipv4_hderr: 0
mmc_rx_ipv4_nopay: 21
mmc_rx_ipv4_frag: 0
mmc_rx_ipv4_udsbl: 1
mmc_rx_ipv4_gd_octets: 3242768541
mmc_rx_ipv4_hderr_octets: 0
mmc_rx_ipv4_nopay_octets: 982
mmc_rx_ipv4_frag_octets: 0
mmc_rx_ipv4_udsbl_octets: 12
mmc_rx_ipv6_gd_octets: 20851
mmc_rx_ipv6_hderr_octets: 0
mmc_rx_ipv6_nopay_octets: 0
mmc_rx_ipv6_gd: 93
mmc_rx_ipv6_hderr: 0
mmc_rx_ipv6_nopay: 0
mmc_rx_udp_gd: 1942
mmc_rx_udp_err: 0
mmc_rx_tcp_gd: 2254045
mmc_rx_tcp_err: 0
mmc_rx_icmp_gd: 34
mmc_rx_icmp_err: 0
mmc_rx_udp_gd_octets: 885355
mmc_rx_udp_err_octets: 0
mmc_rx_tcp_gd_octets: 3196780259
mmc_rx_tcp_err_octets: 0
mmc_rx_icmp_gd_octets: 1300
mmc_rx_icmp_err_octets: 0
tx_underflow: 0
tx_carrier: 0
tx_losscarrier: 0
vlan_tag: 2345667
tx_deferred: 0
tx_vlan: 655982
tx_jabber: 0
tx_frame_flushed: 0
tx_payload_error: 0
tx_ip_header_error: 0
rx_desc: 0
sa_filter_fail: 0
overflow_error: 0
ipc_csum_error: 0
rx_collision: 0
rx_crc_errors: 0
dribbling_bit: 0
rx_length: 0
rx_mii: 0
rx_multicast: 0
rx_gmac_overflow: 0
rx_watchdog: 0
da_rx_filter_fail: 0
sa_rx_filter_fail: 0
rx_missed_cntr: 0
rx_overflow_cntr: 0
rx_vlan: 0
tx_undeflow_irq: 0
tx_process_stopped_irq: 0
tx_jabber_irq: 0
rx_overflow_irq: 0
rx_buf_unav_irq: 0
rx_process_stopped_irq: 0
rx_watchdog_irq: 0
tx_early_irq: 0
fatal_bus_error_irq: 0
rx_early_irq: 20521
threshold: 1
tx_pkt_n: 655982
rx_pkt_n: 2345727
normal_irq_n: 227466
rx_normal_irq_n: 195493
napi_poll: 227438
tx_normal_irq_n: 28972
tx_clean: 227438
tx_set_ic_bit: 26239
irq_receive_pmt_irq_n: 0
mmc_tx_irq_n: 0
mmc_rx_irq_n: 0
mmc_rx_csum_offload_irq_n: 0
irq_tx_path_in_lpi_mode_n: 0
irq_tx_path_exit_lpi_mode_n: 0
irq_rx_path_in_lpi_mode_n: 1
irq_rx_path_exit_lpi_mode_n: 1
phy_eee_wakeup_error_n: 0
ip_hdr_err: 0
ip_payload_err: 0
ip_csum_bypassed: 0
ipv4_pkt_rcvd: 0
ipv6_pkt_rcvd: 0
no_ptp_rx_msg_type_ext: 0
ptp_rx_msg_type_sync: 0
ptp_rx_msg_type_follow_up: 0
ptp_rx_msg_type_delay_req: 0
ptp_rx_msg_type_delay_resp: 0
ptp_rx_msg_type_pdelay_req: 0
ptp_rx_msg_type_pdelay_resp: 0
ptp_rx_msg_type_pdelay_follow_up: 0
ptp_rx_msg_type_announce: 0
ptp_rx_msg_type_management: 0
ptp_rx_msg_pkt_reserved_type: 0
ptp_frame_type: 0
ptp_ver: 0
timestamp_dropped: 0
av_pkt_rcvd: 0
av_tagged_pkt_rcvd: 0
vlan_tag_priority_val: 0
l3_filter_match: 0
l4_filter_match: 0
l3_l4_filter_no_match: 0
irq_pcs_ane_n: 0
irq_pcs_link_n: 0
irq_rgmii_n: 0
mtl_tx_status_fifo_full: 0
mtl_tx_fifo_not_empty: 0
mmtl_fifo_ctrl: 0
mtl_tx_fifo_read_ctrl_write: 0
mtl_tx_fifo_read_ctrl_wait: 0
mtl_tx_fifo_read_ctrl_read: 0
mtl_tx_fifo_read_ctrl_idle: 0
mac_tx_in_pause: 0
mac_tx_frame_ctrl_xfer: 0
mac_tx_frame_ctrl_idle: 0
mac_tx_frame_ctrl_wait: 0
mac_tx_frame_ctrl_pause: 0
mac_gmii_tx_proto_engine: 0
mtl_rx_fifo_fill_level_full: 0
mtl_rx_fifo_fill_above_thresh: 0
mtl_rx_fifo_fill_below_thresh: 0
mtl_rx_fifo_fill_level_empty: 0
mtl_rx_fifo_read_ctrl_flush: 0
mtl_rx_fifo_read_ctrl_read_data: 0
mtl_rx_fifo_read_ctrl_status: 0
mtl_rx_fifo_read_ctrl_idle: 0
mtl_rx_fifo_ctrl_active: 0
mac_rx_frame_ctrl_fifo: 0
mac_gmii_rx_proto_engine: 0
tx_tso_frames: 0
tx_tso_nfrags: 0
^ permalink raw reply
* Re: [PATCH 1/2] wireless: mt76: call hweight8() instead of __sw_hweight8()
From: Kalle Valo @ 2019-02-18 18:08 UTC (permalink / raw)
To: Masahiro Yamada
Cc: Ingo Molnar, Thomas Gleixner, Borislav Petkov, H . Peter Anvin,
x86, linux-wireless, Christoph Hellwig, David S. Miller, netdev,
linux-kernel, Lorenzo Bianconi, linux-mediatek, linux-arm-kernel,
Felix Fietkau, Matthias Brugger
In-Reply-To: <1550469571-25933-2-git-send-email-yamada.masahiro@socionext.com>
Masahiro Yamada <yamada.masahiro@socionext.com> writes:
> __sw_hweight8() is just internal implementation.
>
> Drivers should use the common API, hweight8().
>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Kalle Valo <kvalo@codeaurora.org>
> This patch should go to x86 tree along with 2/2.
>
> Otherwise, all{yes,mod}config of x86 would be broken.
>
> This patch is trivial enough.
> I want ACK from the net/wireless maintainer
> so that this can go in via x86 tree.
Sounds good to me, feel free to push via the x86 tree.
--
Kalle Valo
^ permalink raw reply
* Re: [PATCH][next] Bluetooth: a2mp: Use struct_size() helper
From: Gustavo A. R. Silva @ 2019-02-18 17:50 UTC (permalink / raw)
To: Marcel Holtmann
Cc: Johan Hedberg, David S. Miller, linux-bluetooth, netdev,
linux-kernel
In-Reply-To: <F03ABE42-2AB3-4519-9E64-43E4600C6A42@holtmann.org>
On 2/18/19 7:02 AM, Marcel Holtmann wrote:
> Hi Gustavo,
>
>> One of the more common cases of allocation size calculations is finding
>> the size of a structure that has a zero-sized array at the end, along
>> with memory for some number of elements for that array. For example:
>>
>> struct foo {
>> int stuff;
>> struct boo entry[];
>> };
>>
>> size = sizeof(struct foo) + count * sizeof(struct boo);
>> instance = alloc(size, GFP_KERNEL)
>>
>> Instead of leaving these open-coded and prone to type mistakes, we can
>> now use the new struct_size() helper:
>>
>> size = struct_size(instance, entry, count);
>> instance = alloc(size, GFP_KERNEL)
>>
>> This code was detected with the help of Coccinelle.
>>
>> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
>> ---
>> net/bluetooth/a2mp.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> patch has been applied to bluetooth-next tree.
>
Thanks Marcel.
--
Gustavo
^ permalink raw reply
* Re: No traffic with Marvell switch and latest linux-next
From: Heiner Kallweit @ 2019-02-18 18:16 UTC (permalink / raw)
To: Andrew Lunn
Cc: Russell King - ARM Linux admin, Florian Fainelli,
netdev@vger.kernel.org
In-Reply-To: <20190217171027.GH5968@lunn.ch>
On 17.02.2019 18:10, Andrew Lunn wrote:
>> Sorry, I may have been too fast with this statement. With this patch
>> reverted it worked, but now I have a build with this patch still included,
>> and it works too. Need to dig deeper ..
>
> Hi Heiner
>
> Watch out for boot vs reboot, and when rebooting if port 8 had link or
> not before you reboot.
>
Will do. Is there some known issue or bug?
> Andrew
>
Heiner
^ permalink raw reply
* Re: [PATCH net-next 02/12] net: sched: flower: refactor fl_change
From: Stefano Brivio @ 2019-02-18 18:20 UTC (permalink / raw)
To: Vlad Buslov, jiri@resnulli.us
Cc: netdev@vger.kernel.org, jhs@mojatatu.com,
xiyou.wangcong@gmail.com, davem@davemloft.net
In-Reply-To: <vbf8syhja0k.fsf@mellanox.com>
On Fri, 15 Feb 2019 16:25:52 +0000
Vlad Buslov <vladbu@mellanox.com> wrote:
> On Fri 15 Feb 2019 at 10:47, Stefano Brivio <sbrivio@redhat.com> wrote:
>
> > Ah, of course. Thanks for clarifying. By the way, what tricked me here
> > was this check in fl_change():
> >
> > if (fold && handle && fold->handle != handle)
> > ...
> >
> > which could be turned into:
> >
> > if (fold && fold->handle != handle)
> > ...
> >
> > at this point.
>
> At this point I don't think this check is needed at all because fold
> can't suddenly change its handle in between this check and initial
> lookup in cls API.
Oh, right.
> Looking at commit history, this check is present since original commit
> by Jiri that implements flower classifier. Maybe semantics of cls API
> was different back then?
I wasn't able to figure that out either... Jiri?
--
Stefano
^ permalink raw reply
* [RFC PATCH net-next v3 02/21] ethtool: move to its own directory
From: Michal Kubecek @ 2019-02-18 18:21 UTC (permalink / raw)
To: netdev; +Cc: David Miller, Andrew Lunn, Jakub Kicinski, Jiri Pirko,
linux-kernel
In-Reply-To: <cover.1550513384.git.mkubecek@suse.cz>
The ethtool netlink interface is going to be split into multiple files so
that it will be more convenient to put all of them in a separate directory
net/ethtool. Start by moving current ethtool.c with ioctl interface into
this directory and renaming it to ioct.c.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
---
net/Makefile | 2 +-
net/core/Makefile | 2 +-
net/ethtool/Makefile | 3 +++
net/{core/ethtool.c => ethtool/ioctl.c} | 0
4 files changed, 5 insertions(+), 2 deletions(-)
create mode 100644 net/ethtool/Makefile
rename net/{core/ethtool.c => ethtool/ioctl.c} (100%)
diff --git a/net/Makefile b/net/Makefile
index bdaf53925acd..6c68520e5eb9 100644
--- a/net/Makefile
+++ b/net/Makefile
@@ -13,7 +13,7 @@ obj-$(CONFIG_NET) += $(tmp-y)
# LLC has to be linked before the files in net/802/
obj-$(CONFIG_LLC) += llc/
-obj-$(CONFIG_NET) += ethernet/ 802/ sched/ netlink/ bpf/
+obj-$(CONFIG_NET) += ethernet/ 802/ sched/ netlink/ bpf/ ethtool/
obj-$(CONFIG_NETFILTER) += netfilter/
obj-$(CONFIG_INET) += ipv4/
obj-$(CONFIG_TLS) += tls/
diff --git a/net/core/Makefile b/net/core/Makefile
index f97d6254e564..9ddc2f3ecd97 100644
--- a/net/core/Makefile
+++ b/net/core/Makefile
@@ -8,7 +8,7 @@ obj-y := sock.o request_sock.o skbuff.o datagram.o stream.o scm.o \
obj-$(CONFIG_SYSCTL) += sysctl_net_core.o
-obj-y += dev.o ethtool.o dev_addr_lists.o dst.o netevent.o \
+obj-y += dev.o dev_addr_lists.o dst.o netevent.o \
neighbour.o rtnetlink.o utils.o link_watch.o filter.o \
sock_diag.o dev_ioctl.o tso.o sock_reuseport.o \
fib_notifier.o xdp.o flow_offload.o
diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile
new file mode 100644
index 000000000000..3ebfab2bca66
--- /dev/null
+++ b/net/ethtool/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-y += ioctl.o
diff --git a/net/core/ethtool.c b/net/ethtool/ioctl.c
similarity index 100%
rename from net/core/ethtool.c
rename to net/ethtool/ioctl.c
--
2.20.1
^ permalink raw reply related
* Re: No traffic with Marvell switch and latest linux-next
From: Andrew Lunn @ 2019-02-18 18:21 UTC (permalink / raw)
To: Heiner Kallweit
Cc: Russell King - ARM Linux admin, Florian Fainelli,
netdev@vger.kernel.org
In-Reply-To: <33f9ef8d-df62-e154-f880-f886abf54e0a@gmail.com>
> > Hi Heiner
> >
> > Watch out for boot vs reboot, and when rebooting if port 8 had link or
> > not before you reboot.
> >
> Will do. Is there some known issue or bug?
Hi Heiner
No, but it is a variable which can make a difference. The fix i made
for the Freescale GPIO controller was not an issue for cold boot, but
reboot with link up did cause interrupt problems, etc.
Andrew
^ permalink raw reply
* [RFC PATCH net-next v3 03/21] ethtool: introduce ethtool netlink interface
From: Michal Kubecek @ 2019-02-18 18:21 UTC (permalink / raw)
To: netdev; +Cc: David Miller, Andrew Lunn, Jakub Kicinski, Jiri Pirko,
linux-kernel
In-Reply-To: <cover.1550513384.git.mkubecek@suse.cz>
Basic genetlink and init infrastructure for the netlink interface, register
genetlink family "ethtool". Introduce CONFIG_ETHTOOL_NETLINK Kconfig
option. Add interface description into Documentation/networking.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
---
Documentation/networking/ethtool-netlink.txt | 167 +++++++++++++++++++
include/linux/ethtool_netlink.h | 9 +
include/uapi/linux/ethtool_netlink.h | 19 +++
net/Kconfig | 8 +
net/ethtool/Makefile | 6 +-
net/ethtool/netlink.c | 34 ++++
net/ethtool/netlink.h | 12 ++
7 files changed, 254 insertions(+), 1 deletion(-)
create mode 100644 Documentation/networking/ethtool-netlink.txt
create mode 100644 include/linux/ethtool_netlink.h
create mode 100644 include/uapi/linux/ethtool_netlink.h
create mode 100644 net/ethtool/netlink.c
create mode 100644 net/ethtool/netlink.h
diff --git a/Documentation/networking/ethtool-netlink.txt b/Documentation/networking/ethtool-netlink.txt
new file mode 100644
index 000000000000..09c36e0392a8
--- /dev/null
+++ b/Documentation/networking/ethtool-netlink.txt
@@ -0,0 +1,167 @@
+ Netlink interface for ethtool
+ =============================
+
+
+Basic information
+-----------------
+
+Netlink interface for ethtool uses generic netlink family "ethtool" (userspace
+application should use macros ETHTOOL_GENL_NAME and ETHTOOL_GENL_VERSION
+defined in <linux/ethtool_netlink.h> uapi header). This family does not use
+a specific header, all information in requests and replies is passed using
+netlink attributes.
+
+In requests, device can be identified by ifindex or by name; if both are used,
+they must match. In replies, kernel fills both. The meaning of flags,
+info_mask and index fields depends on request type.
+
+The ethtool netlink interface uses extended ACK for error and warning
+reporting, userspace application developers are encouraged to make these
+messages available to user in a suitable way.
+
+Requests can be divided into three categories: "get" (retrieving information),
+"set" (setting parameters) and "action" (invoking an action).
+
+All "set" and "action" type requests require admin privileges (CAP_NET_ADMIN
+in the namespace). Most "get" type request are allowed for anyone but there
+are exceptions (where the response contains sensitive information). In some
+cases, the request as such is allowed for anyone but unprivileged users have
+attributes with sensitive information (e.g. wake-on-lan password) omitted.
+
+
+Conventions
+-----------
+
+Attributes which represent a boolean value usually use u8 type so that we can
+distinguish three states: "on", "off" and "not present" (meaning the
+information is not available in "get" requests or value is not to be changed
+in "set" requests). For these attributes, the "true" value should be passed as
+number 1 but any non-zero value should be understood as "true" by recipient.
+
+Some request types allow passing an attribute named ETHA_*_INFOMASK with
+a bitmask telling kernel that we are only interested in some parts of the
+information. If info mask is omitted, all available information is returned.
+Meaning of info mask bits depends on request type and is listed below.
+
+
+Device identification
+---------------------
+
+When appropriate, network device is identified by a nested attribute named
+ETHA_*_DEV. This attribute can contain
+
+ ETHA_DEV_INDEX (u32) device ifindex
+ ETHA_DEV_NAME (string) device name
+
+In device related requests, one of these is sufficient; if both are used, they
+must match (i.e. identify the same device). In device related replies both are
+provided by kernel. In dump requests, device is not specified and kernel
+replies with one message per network device (only those for which the request
+is supported).
+
+List of message types
+---------------------
+
+All constants use ETHNL_CMD_ prefix, usually followed by "GET", "SET" or "ACT"
+to indicate the type.
+
+Messages of type "get" are used by userspace to request information and
+usually do not contain any attributes (that may be added later for dump
+filtering). Kernel response is in the form of corresponding "set" message;
+the same message can be also used to set (some of) the parameters, except for
+messages marked as "response only" in the table above. "Get" messages with
+NLM_F_DUMP flags and no device identification dump the information for all
+devices supporting the request.
+
+Later sections describe the format and semantics of these request messages.
+
+
+Request translation
+-------------------
+
+The following table maps iosctl commands to netlink commands providing their
+functionality. Entries with "n/a" in right column are commands which do not
+have their netlink replacement yet.
+
+ioctl command netlink command
+---------------------------------------------------------------------
+ETHTOOL_GSET n/a
+ETHTOOL_SSET n/a
+ETHTOOL_GDRVINFO n/a
+ETHTOOL_GREGS n/a
+ETHTOOL_GWOL n/a
+ETHTOOL_SWOL n/a
+ETHTOOL_GMSGLVL n/a
+ETHTOOL_SMSGLVL n/a
+ETHTOOL_NWAY_RST n/a
+ETHTOOL_GLINK n/a
+ETHTOOL_GEEPROM n/a
+ETHTOOL_SEEPROM n/a
+ETHTOOL_GCOALESCE n/a
+ETHTOOL_SCOALESCE n/a
+ETHTOOL_GRINGPARAM n/a
+ETHTOOL_SRINGPARAM n/a
+ETHTOOL_GPAUSEPARAM n/a
+ETHTOOL_SPAUSEPARAM n/a
+ETHTOOL_GRXCSUM n/a
+ETHTOOL_SRXCSUM n/a
+ETHTOOL_GTXCSUM n/a
+ETHTOOL_STXCSUM n/a
+ETHTOOL_GSG n/a
+ETHTOOL_SSG n/a
+ETHTOOL_TEST n/a
+ETHTOOL_GSTRINGS n/a
+ETHTOOL_PHYS_ID n/a
+ETHTOOL_GSTATS n/a
+ETHTOOL_GTSO n/a
+ETHTOOL_STSO n/a
+ETHTOOL_GPERMADDR n/a
+ETHTOOL_GUFO n/a
+ETHTOOL_SUFO n/a
+ETHTOOL_GGSO n/a
+ETHTOOL_SGSO n/a
+ETHTOOL_GFLAGS n/a
+ETHTOOL_SFLAGS n/a
+ETHTOOL_GPFLAGS n/a
+ETHTOOL_SPFLAGS n/a
+ETHTOOL_GRXFH n/a
+ETHTOOL_SRXFH n/a
+ETHTOOL_GGRO n/a
+ETHTOOL_SGRO n/a
+ETHTOOL_GRXRINGS n/a
+ETHTOOL_GRXCLSRLCNT n/a
+ETHTOOL_GRXCLSRULE n/a
+ETHTOOL_GRXCLSRLALL n/a
+ETHTOOL_SRXCLSRLDEL n/a
+ETHTOOL_SRXCLSRLINS n/a
+ETHTOOL_FLASHDEV n/a
+ETHTOOL_RESET n/a
+ETHTOOL_SRXNTUPLE n/a
+ETHTOOL_GRXNTUPLE n/a
+ETHTOOL_GSSET_INFO n/a
+ETHTOOL_GRXFHINDIR n/a
+ETHTOOL_SRXFHINDIR n/a
+ETHTOOL_GFEATURES n/a
+ETHTOOL_SFEATURES n/a
+ETHTOOL_GCHANNELS n/a
+ETHTOOL_SCHANNELS n/a
+ETHTOOL_SET_DUMP n/a
+ETHTOOL_GET_DUMP_FLAG n/a
+ETHTOOL_GET_DUMP_DATA n/a
+ETHTOOL_GET_TS_INFO n/a
+ETHTOOL_GMODULEINFO n/a
+ETHTOOL_GMODULEEEPROM n/a
+ETHTOOL_GEEE n/a
+ETHTOOL_SEEE n/a
+ETHTOOL_GRSSH n/a
+ETHTOOL_SRSSH n/a
+ETHTOOL_GTUNABLE n/a
+ETHTOOL_STUNABLE n/a
+ETHTOOL_GPHYSTATS n/a
+ETHTOOL_PERQUEUE n/a
+ETHTOOL_GLINKSETTINGS n/a
+ETHTOOL_SLINKSETTINGS n/a
+ETHTOOL_PHY_GTUNABLE n/a
+ETHTOOL_PHY_STUNABLE n/a
+ETHTOOL_GFECPARAM n/a
+ETHTOOL_SFECPARAM n/a
diff --git a/include/linux/ethtool_netlink.h b/include/linux/ethtool_netlink.h
new file mode 100644
index 000000000000..0412adb4f42f
--- /dev/null
+++ b/include/linux/ethtool_netlink.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+
+#ifndef _LINUX_ETHTOOL_NETLINK_H_
+#define _LINUX_ETHTOOL_NETLINK_H_
+
+#include <uapi/linux/ethtool_netlink.h>
+#include <linux/ethtool.h>
+
+#endif /* _LINUX_ETHTOOL_NETLINK_H_ */
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
new file mode 100644
index 000000000000..d8a8d3c72c2f
--- /dev/null
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+
+#ifndef _UAPI_LINUX_ETHTOOL_NETLINK_H_
+#define _UAPI_LINUX_ETHTOOL_NETLINK_H_
+
+#include <linux/ethtool.h>
+
+enum {
+ ETHNL_CMD_NOOP,
+
+ __ETHNL_CMD_CNT,
+ ETHNL_CMD_MAX = (__ETHNL_CMD_CNT - 1)
+};
+
+/* generic netlink info */
+#define ETHTOOL_GENL_NAME "ethtool"
+#define ETHTOOL_GENL_VERSION 1
+
+#endif /* _UAPI_LINUX_ETHTOOL_NETLINK_H_ */
diff --git a/net/Kconfig b/net/Kconfig
index 62da6148e9f8..383fe04ddf07 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -460,6 +460,14 @@ config FAILOVER
migration of VMs with direct attached VFs by failing over to the
paravirtual datapath when the VF is unplugged.
+config ETHTOOL_NETLINK
+ bool "Netlink interface for ethtool"
+ default y
+ help
+ An alternative userspace interface for ethtool based on generic
+ netlink. It provides better extensibility and some new features,
+ e.g. notification messages.
+
endif # if NET
# Used by archs to tell that they support BPF JIT compiler plus which flavour.
diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile
index 3ebfab2bca66..f30e0da88be5 100644
--- a/net/ethtool/Makefile
+++ b/net/ethtool/Makefile
@@ -1,3 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
-obj-y += ioctl.o
+obj-y += ioctl.o
+
+obj-$(CONFIG_ETHTOOL_NETLINK) += ethtool_nl.o
+
+ethtool_nl-y := netlink.o
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
new file mode 100644
index 000000000000..5fe3e5b68e81
--- /dev/null
+++ b/net/ethtool/netlink.c
@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
+
+#include <linux/ethtool_netlink.h>
+#include "netlink.h"
+
+/* genetlink setup */
+
+static const struct genl_ops ethtool_genl_ops[] = {
+};
+
+struct genl_family ethtool_genl_family = {
+ .hdrsize = 0,
+ .name = ETHTOOL_GENL_NAME,
+ .version = ETHTOOL_GENL_VERSION,
+ .netnsok = true,
+ .parallel_ops = true,
+ .ops = ethtool_genl_ops,
+ .n_ops = ARRAY_SIZE(ethtool_genl_ops),
+};
+
+/* module setup */
+
+static int __init ethnl_init(void)
+{
+ int ret;
+
+ ret = genl_register_family(ðtool_genl_family);
+ if (ret < 0)
+ panic("ethtool: could not register genetlink family\n");
+
+ return 0;
+}
+
+subsys_initcall(ethnl_init);
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
new file mode 100644
index 000000000000..63063b582ca2
--- /dev/null
+++ b/net/ethtool/netlink.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+
+#ifndef _NET_ETHTOOL_NETLINK_H
+#define _NET_ETHTOOL_NETLINK_H
+
+#include <linux/ethtool_netlink.h>
+#include <linux/netdevice.h>
+#include <net/genetlink.h>
+
+extern struct genl_family ethtool_genl_family;
+
+#endif /* _NET_ETHTOOL_NETLINK_H */
--
2.20.1
^ permalink raw reply related
* [RFC PATCH net-next v3 04/21] ethtool: helper functions for netlink interface
From: Michal Kubecek @ 2019-02-18 18:21 UTC (permalink / raw)
To: netdev; +Cc: David Miller, Andrew Lunn, Jakub Kicinski, Jiri Pirko,
linux-kernel
In-Reply-To: <cover.1550513384.git.mkubecek@suse.cz>
Various helpers used by ethtool netlink code.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
---
include/uapi/linux/ethtool_netlink.h | 11 +++
net/ethtool/netlink.c | 119 +++++++++++++++++++++++
net/ethtool/netlink.h | 135 +++++++++++++++++++++++++++
3 files changed, 265 insertions(+)
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index d8a8d3c72c2f..01896a1ee21a 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -12,6 +12,17 @@ enum {
ETHNL_CMD_MAX = (__ETHNL_CMD_CNT - 1)
};
+/* device specification */
+
+enum {
+ ETHA_DEV_UNSPEC,
+ ETHA_DEV_INDEX, /* u32 */
+ ETHA_DEV_NAME, /* string */
+
+ __ETHA_DEV_CNT,
+ ETHA_DEV_MAX = (__ETHA_DEV_CNT - 1)
+};
+
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 5fe3e5b68e81..ffdcc7c9d4bc 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -1,8 +1,127 @@
// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
+#include <net/sock.h>
#include <linux/ethtool_netlink.h>
#include "netlink.h"
+static const struct nla_policy dev_policy[ETHA_DEV_MAX + 1] = {
+ [ETHA_DEV_UNSPEC] = { .type = NLA_REJECT },
+ [ETHA_DEV_INDEX] = { .type = NLA_U32 },
+ [ETHA_DEV_NAME] = { .type = NLA_NUL_STRING,
+ .len = IFNAMSIZ - 1 },
+};
+
+struct net_device *ethnl_dev_get(struct genl_info *info, struct nlattr *nest)
+{
+ struct net *net = genl_info_net(info);
+ struct nlattr *tb[ETHA_DEV_MAX + 1];
+ struct net_device *dev;
+ int ret;
+
+ if (!nest) {
+ ETHNL_SET_ERRMSG(info,
+ "mandatory device identification missing");
+ return ERR_PTR(-EINVAL);
+ }
+ ret = nla_parse_nested(tb, ETHA_DEV_MAX, nest, dev_policy,
+ info->extack);
+ if (ret < 0)
+ return ERR_PTR(ret);
+
+ if (tb[ETHA_DEV_INDEX]) {
+ dev = dev_get_by_index(net, nla_get_u32(tb[ETHA_DEV_INDEX]));
+ if (!dev)
+ return ERR_PTR(-ENODEV);
+ /* if both ifindex and ifname are passed, they must match */
+ if (tb[ETHA_DEV_NAME]) {
+ const char *nl_name = nla_data(tb[ETHA_DEV_NAME]);
+
+ if (strncmp(dev->name, nl_name, IFNAMSIZ)) {
+ dev_put(dev);
+ ETHNL_SET_ERRMSG(info,
+ "ifindex and ifname do not match");
+ return ERR_PTR(-ENODEV);
+ }
+ }
+ return dev;
+ } else if (tb[ETHA_DEV_NAME]) {
+ dev = dev_get_by_name(net, nla_data(tb[ETHA_DEV_NAME]));
+ if (!dev)
+ return ERR_PTR(-ENODEV);
+ } else {
+ ETHNL_SET_ERRMSG(info, "either ifindex or ifname required");
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (!netif_device_present(dev)) {
+ dev_put(dev);
+ ETHNL_SET_ERRMSG(info, "device not present");
+ return ERR_PTR(-ENODEV);
+ }
+ return dev;
+}
+
+int ethnl_fill_dev(struct sk_buff *msg, struct net_device *dev, u16 attrtype)
+{
+ struct nlattr *nest;
+ int ret = -EMSGSIZE;
+
+ nest = ethnl_nest_start(msg, attrtype);
+ if (!nest)
+ return -EMSGSIZE;
+
+ if (nla_put_u32(msg, ETHA_DEV_INDEX, (u32)dev->ifindex))
+ goto err;
+ if (nla_put_string(msg, ETHA_DEV_NAME, dev->name))
+ goto err;
+
+ nla_nest_end(msg, nest);
+ return 0;
+err:
+ nla_nest_cancel(msg, nest);
+ return ret;
+}
+
+/* create skb for a reply and fill device identification
+ * payload: payload length (without netlink and genetlink header)
+ * dev: device the reply is about (may be null)
+ * cmd: ETHNL_CMD_* command for reply
+ * info: info for the received packet we respond to
+ * ehdrp: place to store payload pointer returned by genlmsg_new()
+ * returns: skb or null on error
+ */
+struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd,
+ u16 dev_attrtype, struct genl_info *info,
+ void **ehdrp)
+{
+ void *ehdr;
+ struct sk_buff *rskb;
+
+ rskb = genlmsg_new(payload, GFP_KERNEL);
+ if (!rskb) {
+ ETHNL_SET_ERRMSG(info,
+ "failed to allocate reply message");
+ return NULL;
+ }
+
+ ehdr = genlmsg_put_reply(rskb, info, ðtool_genl_family, 0, cmd);
+ if (!ehdr)
+ goto err;
+ if (ehdrp)
+ *ehdrp = ehdr;
+ if (dev) {
+ int ret = ethnl_fill_dev(rskb, dev, dev_attrtype);
+
+ if (ret < 0)
+ goto err;
+ }
+
+ return rskb;
+err:
+ nlmsg_free(rskb);
+ return NULL;
+}
+
/* genetlink setup */
static const struct genl_ops ethtool_genl_ops[] = {
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 63063b582ca2..36a397656127 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -6,7 +6,142 @@
#include <linux/ethtool_netlink.h>
#include <linux/netdevice.h>
#include <net/genetlink.h>
+#include <net/sock.h>
+
+#define ETHNL_SET_ERRMSG(info, msg) \
+ do { if (info) GENL_SET_ERR_MSG(info, msg); } while (0)
extern struct genl_family ethtool_genl_family;
+struct net_device *ethnl_dev_get(struct genl_info *info, struct nlattr *nest);
+int ethnl_fill_dev(struct sk_buff *msg, struct net_device *dev, u16 attrtype);
+
+struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd,
+ u16 dev_attrtype, struct genl_info *info,
+ void **ehdrp);
+
+static inline int ethnl_str_size(const char *s)
+{
+ return nla_total_size(strlen(s) + 1);
+}
+
+static inline int ethnl_str_ifne_size(const char *s)
+{
+ return s[0] ? ethnl_str_size(s) : 0;
+}
+
+static inline int ethnl_put_str_ifne(struct sk_buff *skb, int attrtype,
+ const char *s)
+{
+ if (!s[0])
+ return 0;
+ return nla_put_string(skb, attrtype, s);
+}
+
+static inline struct nlattr *ethnl_nest_start(struct sk_buff *skb,
+ int attrtype)
+{
+ return nla_nest_start(skb, attrtype | NLA_F_NESTED);
+}
+
+/* ethnl_update_* return true if the value is changed */
+static inline bool ethnl_update_u32(u32 *dst, struct nlattr *attr)
+{
+ u32 val;
+
+ if (!attr)
+ return false;
+ val = nla_get_u32(attr);
+ if (*dst == val)
+ return false;
+
+ *dst = val;
+ return true;
+}
+
+static inline bool ethnl_update_u8(u8 *dst, struct nlattr *attr)
+{
+ u8 val;
+
+ if (!attr)
+ return false;
+ val = nla_get_u8(attr);
+ if (*dst == val)
+ return false;
+
+ *dst = val;
+ return true;
+}
+
+/* update u32 value used as bool from NLA_U8 */
+static inline bool ethnl_update_bool32(u32 *dst, struct nlattr *attr)
+{
+ u8 val;
+
+ if (!attr)
+ return false;
+ val = !!nla_get_u8(attr);
+ if (!!*dst == val)
+ return false;
+
+ *dst = val;
+ return true;
+}
+
+static inline bool ethnl_update_binary(u8 *dst, unsigned int len,
+ struct nlattr *attr)
+{
+ if (!attr)
+ return false;
+ if (nla_len(attr) < len)
+ len = nla_len(attr);
+ if (!memcmp(dst, nla_data(attr), len))
+ return false;
+
+ memcpy(dst, nla_data(attr), len);
+ return true;
+}
+
+static inline bool ethnl_update_bitfield32(u32 *dst, struct nlattr *attr)
+{
+ struct nla_bitfield32 change;
+ u32 newval;
+
+ if (!attr)
+ return false;
+ change = nla_get_bitfield32(attr);
+ newval = (*dst & ~change.selector) | (change.value & change.selector);
+ if (*dst == newval)
+ return false;
+
+ *dst = newval;
+ return true;
+}
+
+static inline void warn_partial_info(struct genl_info *info)
+{
+ ETHNL_SET_ERRMSG(info, "not all requested data could be retrieved");
+}
+
+/* Check user privileges explicitly to allow finer access control based on
+ * context of the request or hiding part of the information from unprivileged
+ * users
+ */
+static inline bool ethnl_is_privileged(struct sk_buff *skb)
+{
+ struct net *net = sock_net(skb->sk);
+
+ return netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN);
+}
+
+/* total size of ETHA_*_DEV nested attribute; this is an upper estimate so that
+ * we do not need to hold RTNL longer than necessary to prevent rename between
+ * estimating the size and composing the message
+ */
+static inline unsigned int dev_ident_size(void)
+{
+ return nla_total_size(nla_total_size(sizeof(u32)) +
+ nla_total_size(IFNAMSIZ));
+}
+
#endif /* _NET_ETHTOOL_NETLINK_H */
--
2.20.1
^ permalink raw reply related
* [RFC PATCH net-next v3 05/21] ethtool: netlink bitset handling
From: Michal Kubecek @ 2019-02-18 18:21 UTC (permalink / raw)
To: netdev; +Cc: David Miller, Andrew Lunn, Jakub Kicinski, Jiri Pirko,
linux-kernel
In-Reply-To: <cover.1550513384.git.mkubecek@suse.cz>
Declare attribute type constants and add helper functions to generate and
parse arbitrary length bit sets.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
---
Documentation/networking/ethtool-netlink.txt | 63 ++
include/uapi/linux/ethtool_netlink.h | 32 ++
net/ethtool/Makefile | 2 +-
net/ethtool/bitset.c | 572 +++++++++++++++++++
net/ethtool/bitset.h | 40 ++
net/ethtool/netlink.h | 9 +
6 files changed, 717 insertions(+), 1 deletion(-)
create mode 100644 net/ethtool/bitset.c
create mode 100644 net/ethtool/bitset.h
diff --git a/Documentation/networking/ethtool-netlink.txt b/Documentation/networking/ethtool-netlink.txt
index 09c36e0392a8..205ae4462e9e 100644
--- a/Documentation/networking/ethtool-netlink.txt
+++ b/Documentation/networking/ethtool-netlink.txt
@@ -59,6 +59,69 @@ provided by kernel. In dump requests, device is not specified and kernel
replies with one message per network device (only those for which the request
is supported).
+Bit sets
+--------
+
+For short bitmaps of (reasonably) fixed length, standard NLA_BITFIELD32 type
+is used. For arbitrary length bitmaps, ethtool netlink uses a nested attribute
+with contents of one of two forms: compact (two binary bitmaps representing
+bit values and mask of affected bits) and bit-by-bit (list of bits identified
+by either index or name).
+
+Compact form: nested (bitset) atrribute contents:
+
+ ETHA_BITSET_LIST (flag) no mask, only a list
+ ETHA_BITSET_SIZE (u32) number of significant bits
+ ETHA_BITSET_VALUE (binary) bitmap of bit values
+ ETHA_BITSET_MASK (binary) bitmap of valid bits
+
+Value and mask must have length at least ETHA_BITSET_SIZE bits rounded up to
+a multiple of 32 bits. They consist of 32-bit words in host byte order, words
+ordered from least significant to most significant (i.e. the same way as
+bitmaps are passed with ioctl interface).
+
+For compact form, ETHA_BITSET_SIZE and ETHA_BITSET_VALUE are mandatory.
+Similar to BITFIELD32, a compact form bit set requests to set bits in the mask
+to 1 (if the bit is set in value) or 0 (if not) and preserve the rest. If
+ETHA_BITSET_LIST is present, there is no mask and bitset represents a simple
+list of bits.
+
+Kernel bit set length may differ from userspace length if older application is
+used on newer kernel or vice versa. If userspace bitmap is longer, an error is
+issued only if the request actually tries to set values of some bits not
+recognized by kernel.
+
+Bit-by-bit form: nested (bitset) attribute contents:
+
+ ETHA_BITSET_LIST (flag) no mask, only a list
+ ETHA_BITSET_SIZE (u32) number of significant bits (optional)
+ ETHA_BITSET_BITS (nested) array of bits
+ ETHA_BITSET_BIT
+ ETHA_BIT_INDEX (u32) bit index (0 for LSB)
+ ETHA_BIT_NAME (string) bit name
+ ETHA_BIT_VALUE (flag) present if bit is set
+ ETHA_BITSET_BIT
+ ...
+
+Bit size is optional for bit-by-bit form. ETHA_BITSET_BITS nest can only
+contain ETHA_BITS_BIT attributes but there can be an arbitrary number of them.
+A bit may be identified by its index or by its name. When used in requests,
+listed bits are set to 0 or 1 according to ETHA_BIT_VALUE, the rest is
+preserved. A request fails if index exceeds kernel bit length or if name is
+not recognized.
+
+When ETHA_BITSET_LIST flag is present, bitset is interpreted as a simple bit
+list. ETHA_BIT_VALUE attributes are not used in such case. Bit list represents
+a bitmap with listed bits set and the rest zero.
+
+In requests, application can use either form. Form used by kernel in reply is
+determined by a flag in flags field of request header. Semantics of value and
+mask depends on the attribute. General idea is that flags control request
+processing, info_mask control which parts of the information are returned in
+"get" request and index identifies a particular subcommand or an object to
+which the request applies.
+
+
List of message types
---------------------
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 01896a1ee21a..7f3d401977b4 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -23,6 +23,38 @@ enum {
ETHA_DEV_MAX = (__ETHA_DEV_CNT - 1)
};
+/* bit sets */
+
+enum {
+ ETHA_BIT_UNSPEC,
+ ETHA_BIT_INDEX, /* u32 */
+ ETHA_BIT_NAME, /* string */
+ ETHA_BIT_VALUE, /* flag */
+
+ __ETHA_BIT_CNT,
+ ETHA_BIT_MAX = (__ETHA_BIT_CNT - 1)
+};
+
+enum {
+ ETHA_BITS_UNSPEC,
+ ETHA_BITS_BIT,
+
+ __ETHA_BITS_CNT,
+ ETHA_BITS_MAX = (__ETHA_BITS_CNT - 1)
+};
+
+enum {
+ ETHA_BITSET_UNSPEC,
+ ETHA_BITSET_LIST, /* flag */
+ ETHA_BITSET_SIZE, /* u32 */
+ ETHA_BITSET_BITS, /* nest - ETHA_BITS_* */
+ ETHA_BITSET_VALUE, /* binary */
+ ETHA_BITSET_MASK, /* binary */
+
+ __ETHA_BITSET_CNT,
+ ETHA_BITSET_MAX = (__ETHA_BITSET_CNT - 1)
+};
+
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1
diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile
index f30e0da88be5..482fdb9380fa 100644
--- a/net/ethtool/Makefile
+++ b/net/ethtool/Makefile
@@ -4,4 +4,4 @@ obj-y += ioctl.o
obj-$(CONFIG_ETHTOOL_NETLINK) += ethtool_nl.o
-ethtool_nl-y := netlink.o
+ethtool_nl-y := netlink.o bitset.o
diff --git a/net/ethtool/bitset.c b/net/ethtool/bitset.c
new file mode 100644
index 000000000000..8f5c60999a96
--- /dev/null
+++ b/net/ethtool/bitset.c
@@ -0,0 +1,572 @@
+// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
+
+#include <linux/ethtool_netlink.h>
+#include <linux/bitmap.h>
+#include "netlink.h"
+#include "bitset.h"
+
+static bool ethnl_test_bit(const void *val, unsigned int index, bool is_u32)
+{
+ if (!val)
+ return true;
+ else if (is_u32)
+ return ((const u32 *)val)[index / 32] & (1U << (index % 32));
+ else
+ return test_bit(index, val);
+}
+
+static void __bitmap_to_u32(u32 *dst, const void *src, unsigned int size,
+ bool is_u32)
+{
+ unsigned int full_words = size / 32;
+ const u32 *src32 = src;
+
+ if (!is_u32) {
+ bitmap_to_arr32(dst, src, size);
+ return;
+ }
+
+ memcpy(dst, src32, full_words * sizeof(u32));
+ if (size % 32 != 0)
+ dst[full_words] = src32[full_words] & ((1U << (size % 32)) - 1);
+}
+
+/* convert standard kernel bitmap (long sized words) to ethtool one (u32 words)
+ * bitmap_to_arr32() is not guaranteed to do "in place" conversion correctly;
+ * moreover, we can use the fact that the conversion is no-op except for 64-bit
+ * big endian architectures
+ */
+#if BITS_PER_LONG == 64 && defined(__BIG_ENDIAN)
+void ethnl_bitmap_to_u32(unsigned long *bitmap, unsigned int nwords)
+{
+ u32 *dst = (u32 *)bitmap;
+ unsigned int i;
+
+ for (i = 0; i < nwords; i++) {
+ unsigned long tmp = READ_ONCE(bitmap[i]);
+
+ dst[2 * i] = tmp & 0xffffffff;
+ dst[2 * i + 1] = tmp >> 32;
+ }
+}
+#endif
+
+static const char *bit_name(const void *names, bool legacy, unsigned int idx)
+{
+ const char (*const legacy_names)[ETH_GSTRING_LEN] = names;
+ const char *const *simple_names = names;
+
+ return legacy ? legacy_names[idx] : simple_names[idx];
+}
+
+/* calculate size for a bitset attribute
+ * see ethnl_put_bitset() for arguments
+ */
+static int __ethnl_bitset_size(unsigned int size, const void *val,
+ const void *mask, const void *names,
+ unsigned int flags)
+{
+ const bool legacy = flags & ETHNL_BITSET_LEGACY_NAMES;
+ const bool compact = flags & ETHNL_BITSET_COMPACT;
+ const bool is_list = flags & ETHNL_BITSET_LIST;
+ const bool is_u32 = flags & ETHNL_BITSET_U32;
+ unsigned int nwords = DIV_ROUND_UP(size, 32);
+ unsigned int len = 0;
+
+ if (WARN_ON(!compact && !names))
+ return -EINVAL;
+ /* list flag */
+ if (flags & ETHNL_BITSET_LIST)
+ len += nla_total_size(sizeof(u32));
+ /* size */
+ len += nla_total_size(sizeof(u32));
+
+ if (compact) {
+ /* values, mask */
+ len += 2 * nla_total_size(nwords * sizeof(u32));
+ } else {
+ unsigned int bits_len = 0;
+ unsigned int bit_len, i;
+
+ for (i = 0; i < size; i++) {
+ const char *name = bit_name(names, legacy, i) ?: "";
+
+ if ((is_list || mask) &&
+ !ethnl_test_bit(is_list ? val : mask, i, is_u32))
+ continue;
+ /* index */
+ bit_len = nla_total_size(sizeof(u32));
+ /* name */
+ bit_len += ethnl_str_size(name);
+ /* value */
+ if (!is_list && ethnl_test_bit(val, i, is_u32))
+ bit_len += nla_total_size(0);
+
+ /* bit nest */
+ bits_len += nla_total_size(bit_len);
+ }
+ /* bits nest */
+ len += nla_total_size(bits_len);
+ }
+
+ /* outermost nest */
+ return nla_total_size(len);
+}
+
+int ethnl_bitset_size(unsigned int size, const unsigned long *val,
+ const unsigned long *mask, const void *names,
+ unsigned int flags)
+{
+ return __ethnl_bitset_size(size, val, mask, names,
+ flags & ~ETHNL_BITSET_U32);
+}
+
+int ethnl_bitset32_size(unsigned int size, const u32 *val, const u32 *mask,
+ const void *names, unsigned int flags)
+{
+ return __ethnl_bitset_size(size, val, mask, names,
+ flags | ETHNL_BITSET_U32);
+}
+
+/* put bitset into a message
+ * skb: skb with the message
+ * attrtype: attribute type for the bitset
+ * size: size of the set in bits
+ * val: bitset values
+ * mask: mask of valid bits; NULL is interpreted as "all bits"
+ * names: bit names (only used for verbose format)
+ * flags: combination of ETHNL_BITSET_* flags
+ */
+static int __ethnl_put_bitset(struct sk_buff *skb, int attrtype,
+ unsigned int size, const void *val,
+ const void *mask, const void *names,
+ unsigned int flags)
+{
+ const bool legacy = flags & ETHNL_BITSET_LEGACY_NAMES;
+ const bool compact = flags & ETHNL_BITSET_COMPACT;
+ const bool is_list = flags & ETHNL_BITSET_LIST;
+ const bool is_u32 = flags & ETHNL_BITSET_U32;
+ struct nlattr *nest;
+ struct nlattr *attr;
+ int ret;
+
+ if (WARN_ON(!compact && !names))
+ return -EINVAL;
+ nest = ethnl_nest_start(skb, attrtype);
+ if (!nest)
+ return -EMSGSIZE;
+
+ ret = -EMSGSIZE;
+ if (is_list && nla_put_flag(skb, ETHA_BITSET_LIST))
+ goto err;
+ if (nla_put_u32(skb, ETHA_BITSET_SIZE, size))
+ goto err;
+ if (compact) {
+ unsigned int bytesize = DIV_ROUND_UP(size, 32) * sizeof(u32);
+
+ attr = nla_reserve(skb, ETHA_BITSET_VALUE, bytesize);
+ if (!attr)
+ goto err;
+ __bitmap_to_u32(nla_data(attr), val, size, is_u32);
+ if (mask) {
+ attr = nla_reserve(skb, ETHA_BITSET_MASK, bytesize);
+ if (!attr)
+ goto err;
+ __bitmap_to_u32(nla_data(attr), mask, size, is_u32);
+ }
+ } else {
+ struct nlattr *bits;
+ unsigned int i;
+
+ bits = ethnl_nest_start(skb, ETHA_BITSET_BITS);
+ if (!bits)
+ goto err;
+ for (i = 0; i < size; i++) {
+ const char *name = bit_name(names, legacy, i) ?: "";
+
+ if ((is_list || mask) &&
+ !ethnl_test_bit(is_list ? val : mask, i, is_u32))
+ continue;
+ attr = ethnl_nest_start(skb, ETHA_BITS_BIT);
+ if (!attr ||
+ nla_put_u32(skb, ETHA_BIT_INDEX, i) ||
+ nla_put_string(skb, ETHA_BIT_NAME, name))
+ goto err;
+ if (!is_list && ethnl_test_bit(val, i, is_u32) &&
+ nla_put_flag(skb, ETHA_BIT_VALUE))
+ goto err;
+ nla_nest_end(skb, attr);
+ }
+ nla_nest_end(skb, bits);
+ }
+
+ nla_nest_end(skb, nest);
+ return 0;
+err:
+ nla_nest_cancel(skb, nest);
+ return ret;
+}
+
+int ethnl_put_bitset(struct sk_buff *skb, int attrtype, unsigned int size,
+ const unsigned long *val, const unsigned long *mask,
+ const void *names, unsigned int flags)
+{
+ return __ethnl_put_bitset(skb, attrtype, size, val, mask, names,
+ flags & ~ETHNL_BITSET_U32);
+}
+
+int ethnl_put_bitset32(struct sk_buff *skb, int attrtype, unsigned int size,
+ const u32 *val, const u32 *mask, const void *names,
+ unsigned int flags)
+{
+ return __ethnl_put_bitset(skb, attrtype, size, val, mask, names,
+ flags | ETHNL_BITSET_U32);
+}
+
+static const struct nla_policy bitset_policy[ETHA_BITSET_MAX + 1] = {
+ [ETHA_BITSET_UNSPEC] = { .type = NLA_REJECT },
+ [ETHA_BITSET_LIST] = { .type = NLA_FLAG },
+ [ETHA_BITSET_SIZE] = { .type = NLA_U32 },
+ [ETHA_BITSET_BITS] = { .type = NLA_NESTED },
+ [ETHA_BITSET_VALUE] = { .type = NLA_BINARY },
+ [ETHA_BITSET_MASK] = { .type = NLA_BINARY },
+};
+
+static const struct nla_policy bit_policy[ETHA_BIT_MAX + 1] = {
+ [ETHA_BIT_UNSPEC] = { .type = NLA_REJECT },
+ [ETHA_BIT_INDEX] = { .type = NLA_U32 },
+ [ETHA_BIT_NAME] = { .type = NLA_NUL_STRING },
+ [ETHA_BIT_VALUE] = { .type = NLA_FLAG },
+};
+
+static int ethnl_name_to_idx(const void *names, bool legacy,
+ unsigned int n_names, const char *name,
+ unsigned int name_len)
+{
+ unsigned int i;
+
+ for (i = 0; i < n_names; i++) {
+ const char *bname = bit_name(names, legacy, i);
+
+ if (bname && !strncmp(bname, name, name_len) &&
+ strlen(bname) <= name_len)
+ return i;
+ }
+
+ return n_names;
+}
+
+static int ethnl_update_bit(unsigned long *bitmap, unsigned long *bitmask,
+ unsigned int nbits, const struct nlattr *bit_attr,
+ bool is_list, const void *names, bool legacy,
+ struct genl_info *info)
+{
+ struct nlattr *tb[ETHA_BIT_MAX + 1];
+ int ret, idx;
+
+ if (nla_type(bit_attr) != ETHA_BITS_BIT) {
+ ETHNL_SET_ERRMSG(info,
+ "ETHA_BITSET_BITS can contain only ETHA_BITS_BIT");
+ return genl_err_attr(info, -EINVAL, bit_attr);
+ }
+ ret = nla_parse_nested(tb, ETHA_BIT_MAX, bit_attr, bit_policy,
+ info->extack);
+ if (ret < 0)
+ return ret;
+
+ if (tb[ETHA_BIT_INDEX]) {
+ const char *name;
+
+ idx = nla_get_u32(tb[ETHA_BIT_INDEX]);
+ if (idx >= nbits) {
+ ETHNL_SET_ERRMSG(info, "bit index too high");
+ return genl_err_attr(info, -EOPNOTSUPP,
+ tb[ETHA_BIT_INDEX]);
+ }
+ name = bit_name(names, legacy, idx);
+ if (tb[ETHA_BIT_NAME] && name &&
+ strncmp(nla_data(tb[ETHA_BIT_NAME]), name,
+ nla_len(tb[ETHA_BIT_NAME]))) {
+ ETHNL_SET_ERRMSG(info, "bit index and name mismatch");
+ return genl_err_attr(info, -EINVAL, bit_attr);
+ }
+ } else if (tb[ETHA_BIT_NAME]) {
+ idx = ethnl_name_to_idx(names, legacy, nbits,
+ nla_data(tb[ETHA_BIT_NAME]),
+ nla_len(tb[ETHA_BIT_NAME]));
+ if (idx >= nbits) {
+ ETHNL_SET_ERRMSG(info, "bit name not found");
+ return genl_err_attr(info, -EOPNOTSUPP,
+ tb[ETHA_BIT_NAME]);
+ }
+ } else {
+ ETHNL_SET_ERRMSG(info, "neither bit index nor name specified");
+ return genl_err_attr(info, -EINVAL, bit_attr);
+ }
+
+ if (is_list || tb[ETHA_BIT_VALUE])
+ set_bit(idx, bitmap);
+ else
+ clear_bit(idx, bitmap);
+ if (!is_list || bitmask)
+ set_bit(idx, bitmask);
+ return 0;
+}
+
+int ethnl_bitset_is_compact(const struct nlattr *bitset, bool *compact)
+{
+ struct nlattr *tb[ETHA_BITSET_MAX + 1];
+ int ret;
+
+ ret = nla_parse_nested(tb, ETHA_BITSET_MAX, bitset, bitset_policy,
+ NULL);
+ if (ret < 0)
+ return ret;
+
+ if (tb[ETHA_BITSET_BITS]) {
+ if (tb[ETHA_BITSET_VALUE] || tb[ETHA_BITSET_MASK])
+ return -EINVAL;
+ *compact = false;
+ return 0;
+ }
+ if (!tb[ETHA_BITSET_SIZE] || !tb[ETHA_BITSET_VALUE])
+ return -EINVAL;
+
+ *compact = true;
+ return 0;
+}
+
+/* 64-bit long endian is the only case when u32 based bitmap and unsigned long
+ * based bitmap layouts differ
+ */
+#if BITS_PER_LONG == 64 && defined(__BIG_ENDIAN)
+/* dst &= src */
+static void __bitmap_and_u32(unsigned long *dst, const u32 *src,
+ unsigned int nbits)
+{
+ unsigned long op;
+
+ while (nbits >= BITS_PER_LONG) {
+ op = src[0] | ((unsigned long)src[1] << 32);
+ *dst &= op;
+
+ dst++;
+ src += 2;
+ nbits -= BITS_PER_LONG;
+ }
+
+ if (!nbits)
+ return;
+ op = src[0];
+ if (nbits > 32)
+ op |= ((unsigned long)src[1] << 32);
+ *dst = (op & BITMAP_LAST_WORD_MASK(nbits));
+}
+
+/* map1 == map2 */
+static bool __bitmap_equal_u32(const unsigned long *map1, const u32 *map2,
+ unsigned int nbits)
+{
+ unsigned long dword;
+
+ while (nbits >= BITS_PER_LONG) {
+ dword = map2[0] | ((unsigned long)map2[1] << 32);
+ if (*map1 != dword)
+ return false;
+
+ map1++;
+ map2 += 2;
+ nbits -= BITS_PER_LONG;
+ }
+
+ if (!nbits)
+ return true;
+ dword = map2[0];
+ if (nbits > 32)
+ dword |= ((unsigned long)map2[1] << 32);
+ return !((*map1 ^ dword) & BITMAP_LAST_WORD_MASK(nbits));
+}
+#else
+/* On 32-bit and 64-bit LE, unsigned long and u32 bitmap layout is the same
+ * but we must not write past dst buffer if the number of words is odd.
+ */
+static void __bitmap_and_u32(unsigned long *dst, const u32 *src,
+ unsigned int nbits)
+{
+ u32 *dst32 = (u32 *)dst;
+
+ while (nbits >= 32) {
+ *dst32++ &= *src++;
+ nbits -= 32;
+ }
+ if (!nbits)
+ return;
+ *dst32 &= (*src & ((1U << nbits) - 1));
+}
+
+static bool __bitmap_equal_u32(const unsigned long *map1, const u32 *map2,
+ unsigned int nbits)
+{
+ unsigned int full_words = nbits / 32;
+ u32 last_word_mask;
+ u32 *map1_32 = (u32 *)map1;
+
+ if (memcmp(map1, map2, full_words * BITS_PER_BYTE))
+ return false;
+ if (!(nbits % 32))
+ return true;
+ last_word_mask = (1U << (nbits % 32)) - 1;
+ return !((map1_32[full_words] ^ map2[full_words]) & last_word_mask);
+}
+#endif
+
+/* copy unsigned long bitmap to unsigned long or u32 */
+static void __bitmap_to_any(void *dst, const unsigned long *src,
+ unsigned int nbits, bool dst_is_u32)
+{
+ if (dst_is_u32)
+ bitmap_to_arr32(dst, src, nbits);
+ else
+ bitmap_copy(dst, src, nbits);
+}
+
+static bool __bitmap_equal_any(const unsigned long *map1, const void *map2,
+ unsigned int nbits, bool is_u32)
+{
+ if (!is_u32)
+ return bitmap_equal(map1, map2, nbits);
+ else
+ return __bitmap_equal_u32(map1, map2, nbits);
+}
+
+static bool __ethnl_update_bitset(void *bitmap, void *bitmask,
+ unsigned int nbits, const struct nlattr *attr,
+ int *err, const void *names, bool legacy,
+ struct genl_info *info, bool is_u32)
+{
+ struct nlattr *tb[ETHA_BITSET_MAX + 1];
+ unsigned int change_bits = 0;
+ unsigned int max_bits = 0;
+ unsigned long *val, *mask;
+ bool mod = false;
+ bool is_list;
+
+ *err = 0;
+ if (!attr)
+ return mod;
+ *err = nla_parse_nested(tb, ETHA_BITSET_MAX, attr, bitset_policy,
+ info->extack);
+ if (*err < 0)
+ return mod;
+ *err = -EINVAL;
+ if (tb[ETHA_BITSET_BITS] &&
+ (tb[ETHA_BITSET_VALUE] || tb[ETHA_BITSET_MASK]))
+ return mod;
+ if (!tb[ETHA_BITSET_BITS] &&
+ (!tb[ETHA_BITSET_SIZE] || !tb[ETHA_BITSET_VALUE]))
+ return mod;
+ is_list = (tb[ETHA_BITSET_LIST] != NULL);
+ if (is_list && tb[ETHA_BITSET_MASK])
+ return mod;
+
+ /* To let new userspace to work with old kernel, we allow bitmaps
+ * from userspace to be longer than kernel ones and only issue an
+ * error if userspace actually tries to change a bit not existing
+ * in kernel.
+ */
+ if (tb[ETHA_BITSET_SIZE])
+ change_bits = nla_get_u32(tb[ETHA_BITSET_SIZE]);
+ max_bits = max_t(unsigned int, nbits, change_bits);
+ mask = bitmap_zalloc(max_bits, GFP_KERNEL);
+ val = bitmap_zalloc(max_bits, GFP_KERNEL);
+
+ if (tb[ETHA_BITSET_BITS]) {
+ struct nlattr *bit_attr;
+ int rem;
+
+ if (is_list)
+ bitmap_fill(mask, nbits);
+ else if (is_u32)
+ bitmap_from_arr32(val, bitmap, nbits);
+ else
+ bitmap_copy(val, bitmap, nbits);
+ nla_for_each_nested(bit_attr, tb[ETHA_BITSET_BITS], rem) {
+ *err = ethnl_update_bit(val, mask, nbits, bit_attr,
+ is_list, names, legacy, info);
+ if (*err < 0)
+ goto out_free;
+ }
+ if (bitmask)
+ __bitmap_to_any(bitmask, mask, nbits, is_u32);
+ } else {
+ unsigned int change_words = DIV_ROUND_UP(change_bits, 32);
+
+ *err = 0;
+ if (change_bits == 0 && tb[ETHA_BITSET_MASK])
+ goto out_free;
+ *err = -EINVAL;
+ if (!tb[ETHA_BITSET_VALUE])
+ goto out_free;
+ if (nla_len(tb[ETHA_BITSET_VALUE]) < change_words * sizeof(u32))
+ goto out_free;
+ if (tb[ETHA_BITSET_MASK] &&
+ nla_len(tb[ETHA_BITSET_MASK]) < change_words * sizeof(u32))
+ goto out_free;
+
+ bitmap_from_arr32(val, nla_data(tb[ETHA_BITSET_VALUE]),
+ change_bits);
+ if (tb[ETHA_BITSET_MASK])
+ bitmap_from_arr32(mask, nla_data(tb[ETHA_BITSET_MASK]),
+ change_bits);
+ else
+ bitmap_fill(mask, nbits);
+
+ if (nbits < change_bits) {
+ unsigned int idx = find_next_bit(mask, max_bits, nbits);
+
+ *err = -EINVAL;
+ if (idx < max_bits)
+ goto out_free;
+ }
+
+ if (bitmask)
+ __bitmap_to_any(bitmask, mask, nbits, is_u32);
+ if (!is_list) {
+ bitmap_and(val, val, mask, nbits);
+ bitmap_complement(mask, mask, nbits);
+ if (is_u32)
+ __bitmap_and_u32(mask, bitmap, nbits);
+ else
+ bitmap_and(mask, mask, bitmap, nbits);
+ bitmap_or(val, val, mask, nbits);
+ }
+ }
+
+ mod = !__bitmap_equal_any(val, bitmap, nbits, is_u32);
+ if (mod)
+ __bitmap_to_any(bitmap, val, nbits, is_u32);
+
+ *err = 0;
+out_free:
+ bitmap_free(val);
+ bitmap_free(mask);
+ return mod;
+}
+
+bool ethnl_update_bitset(unsigned long *bitmap, unsigned long *bitmask,
+ unsigned int nbits, const struct nlattr *attr,
+ int *err, const void *names, bool legacy,
+ struct genl_info *info)
+{
+ return __ethnl_update_bitset(bitmap, bitmask, nbits, attr, err, names,
+ legacy, info, false);
+}
+
+bool ethnl_update_bitset32(u32 *bitmap, u32 *bitmask, unsigned int nbits,
+ const struct nlattr *attr, int *err,
+ const void *names, bool legacy,
+ struct genl_info *info)
+{
+ return __ethnl_update_bitset(bitmap, bitmask, nbits, attr, err, names,
+ legacy, info, true);
+}
diff --git a/net/ethtool/bitset.h b/net/ethtool/bitset.h
new file mode 100644
index 000000000000..761d0c47fe23
--- /dev/null
+++ b/net/ethtool/bitset.h
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+
+#ifndef _NET_ETHTOOL_BITSET_H
+#define _NET_ETHTOOL_BITSET_H
+
+/* when set, value and mask bitmaps are arrays of u32, when not, arrays of
+ * unsigned long
+ */
+#define ETHNL_BITSET_U32 BIT(0)
+/* generate a compact format bitset */
+#define ETHNL_BITSET_COMPACT BIT(1)
+/* generate a bit list */
+#define ETHNL_BITSET_LIST BIT(2)
+/* when set, names are interpreted as legacy string set (an array of
+ * char[ETH_GSTRING_LEN]), when not, as a simple array of char *
+ */
+#define ETHNL_BITSET_LEGACY_NAMES BIT(3)
+
+int ethnl_bitset_is_compact(const struct nlattr *bitset, bool *compact);
+int ethnl_bitset_size(unsigned int size, const unsigned long *val,
+ const unsigned long *mask, const void *names,
+ unsigned int flags);
+int ethnl_bitset32_size(unsigned int size, const u32 *val, const u32 *mask,
+ const void *names, unsigned int flags);
+int ethnl_put_bitset(struct sk_buff *skb, int attrtype, unsigned int size,
+ const unsigned long *val, const unsigned long *mask,
+ const void *names, unsigned int flags);
+int ethnl_put_bitset32(struct sk_buff *skb, int attrtype, unsigned int size,
+ const u32 *val, const u32 *mask, const void *names,
+ unsigned int flags);
+bool ethnl_update_bitset(unsigned long *bitmap, unsigned long *bitmask,
+ unsigned int nbits, const struct nlattr *attr,
+ int *err, const void *names, bool legacy,
+ struct genl_info *info);
+bool ethnl_update_bitset32(u32 *bitmap, u32 *bitmask, unsigned int nbits,
+ const struct nlattr *attr, int *err,
+ const void *names, bool legacy,
+ struct genl_info *info);
+
+#endif /* _NET_ETHTOOL_BITSET_H */
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 36a397656127..ba638eb5a99a 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -20,6 +20,15 @@ struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd,
u16 dev_attrtype, struct genl_info *info,
void **ehdrp);
+#if BITS_PER_LONG == 64 && defined(__BIG_ENDIAN)
+void ethnl_bitmap_to_u32(unsigned long *bitmap, unsigned int nwords);
+#else
+static inline void ethnl_bitmap_to_u32(unsigned long *bitmap,
+ unsigned int nwords)
+{
+}
+#endif
+
static inline int ethnl_str_size(const char *s)
{
return nla_total_size(strlen(s) + 1);
--
2.20.1
^ permalink raw reply related
* [RFC PATCH net-next v3 06/21] ethtool: support for netlink notifications
From: Michal Kubecek @ 2019-02-18 18:21 UTC (permalink / raw)
To: netdev; +Cc: David Miller, Andrew Lunn, Jakub Kicinski, Jiri Pirko,
linux-kernel
In-Reply-To: <cover.1550513384.git.mkubecek@suse.cz>
Add infrastructure for ethtool netlink notifications. There is only one
multicast group "monitor" which is used to notify userspace about changes.
Notifications are supposed to be broadcasted on every configuration change,
whether it is done using the netlink interface or legacy ioctl one.
To trigger an ethtool notification, both ethtool netlink and external code
use ethtool_notify() helper. This helper requires RTNL to be held and may
sleep.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
---
include/linux/ethtool_netlink.h | 5 +++++
include/linux/netdevice.h | 12 +++++++++++
include/uapi/linux/ethtool_netlink.h | 2 ++
net/ethtool/netlink.c | 32 ++++++++++++++++++++++++++++
net/ethtool/netlink.h | 2 ++
5 files changed, 53 insertions(+)
diff --git a/include/linux/ethtool_netlink.h b/include/linux/ethtool_netlink.h
index 0412adb4f42f..2a15e64a16f3 100644
--- a/include/linux/ethtool_netlink.h
+++ b/include/linux/ethtool_netlink.h
@@ -5,5 +5,10 @@
#include <uapi/linux/ethtool_netlink.h>
#include <linux/ethtool.h>
+#include <linux/netdevice.h>
+
+enum ethtool_multicast_groups {
+ ETHNL_MCGRP_MONITOR,
+};
#endif /* _LINUX_ETHTOOL_NETLINK_H_ */
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index aab4d9f6613d..9a50a67f328f 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -4340,6 +4340,18 @@ struct netdev_notifier_bonding_info {
void netdev_bonding_info_change(struct net_device *dev,
struct netdev_bonding_info *bonding_info);
+#if IS_ENABLED(CONFIG_ETHTOOL_NETLINK)
+void ethtool_notify(struct net_device *dev, struct netlink_ext_ack *extack,
+ unsigned int cmd, u32 req_mask, const void *data);
+#else
+static inline void ethtool_notify(struct net_device *dev,
+ struct netlink_ext_ack *extack,
+ unsigned int cmd, u32 req_mask,
+ const void *data)
+{
+}
+#endif
+
static inline
struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
{
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 7f3d401977b4..b662d75a0636 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -59,4 +59,6 @@ enum {
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1
+#define ETHTOOL_MCGRP_MONITOR_NAME "monitor"
+
#endif /* _UAPI_LINUX_ETHTOOL_NETLINK_H_ */
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index ffdcc7c9d4bc..a5fa54c2b743 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -4,6 +4,8 @@
#include <linux/ethtool_netlink.h>
#include "netlink.h"
+u32 ethnl_bcast_seq;
+
static const struct nla_policy dev_policy[ETHA_DEV_MAX + 1] = {
[ETHA_DEV_UNSPEC] = { .type = NLA_REJECT },
[ETHA_DEV_INDEX] = { .type = NLA_U32 },
@@ -122,11 +124,39 @@ struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd,
return NULL;
}
+/* notifications */
+
+typedef void (*ethnl_notify_handler_t)(struct net_device *dev,
+ struct netlink_ext_ack *extack,
+ unsigned int cmd, u32 req_mask,
+ const void *data);
+
+ethnl_notify_handler_t ethnl_notify_handlers[] = {
+};
+
+void ethtool_notify(struct net_device *dev, struct netlink_ext_ack *extack,
+ unsigned int cmd, u32 req_mask, const void *data)
+{
+ ASSERT_RTNL();
+
+ if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) &&
+ ethnl_notify_handlers[cmd]))
+ ethnl_notify_handlers[cmd](dev, extack, cmd, req_mask, data);
+ else
+ WARN_ONCE(1, "notification %u not implemented (dev=%s, req_mask=0x%x)\n",
+ cmd, netdev_name(dev), req_mask);
+}
+EXPORT_SYMBOL(ethtool_notify);
+
/* genetlink setup */
static const struct genl_ops ethtool_genl_ops[] = {
};
+static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
+ [ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME },
+};
+
struct genl_family ethtool_genl_family = {
.hdrsize = 0,
.name = ETHTOOL_GENL_NAME,
@@ -135,6 +165,8 @@ struct genl_family ethtool_genl_family = {
.parallel_ops = true,
.ops = ethtool_genl_ops,
.n_ops = ARRAY_SIZE(ethtool_genl_ops),
+ .mcgrps = ethtool_nl_mcgrps,
+ .n_mcgrps = ARRAY_SIZE(ethtool_nl_mcgrps),
};
/* module setup */
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index ba638eb5a99a..78385baeaec0 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -11,6 +11,8 @@
#define ETHNL_SET_ERRMSG(info, msg) \
do { if (info) GENL_SET_ERR_MSG(info, msg); } while (0)
+extern u32 ethnl_bcast_seq;
+
extern struct genl_family ethtool_genl_family;
struct net_device *ethnl_dev_get(struct genl_info *info, struct nlattr *nest);
--
2.20.1
^ permalink raw reply related
* [RFC PATCH net-next v3 07/21] ethtool: implement EVENT notifications
From: Michal Kubecek @ 2019-02-18 18:21 UTC (permalink / raw)
To: netdev; +Cc: David Miller, Andrew Lunn, Jakub Kicinski, Jiri Pirko,
linux-kernel
In-Reply-To: <cover.1550513384.git.mkubecek@suse.cz>
Three types of netlink notifications are introduced:
- ETHA_EVENT_NEWDEV to notify about newly registered network devices
- ETHA_EVENT_DELDEV to notify about unregistered network devices
- ETHA_EVENT_RENAMEDEV to notify about renamed network device
The notifications are triggered by NETDEV_REGISTER, NETDEV_UNREGISTER and
NETDEV_CHANGENAME notifiers.
These notifications are intended for applications and daemons monitoring
ethtool events to allow updating the list of existing devices without
having to open another socket for rtnetlink.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
---
Documentation/networking/ethtool-netlink.txt | 27 ++++++++
include/uapi/linux/ethtool_netlink.h | 37 +++++++++++
net/ethtool/netlink.c | 65 ++++++++++++++++++++
3 files changed, 129 insertions(+)
diff --git a/Documentation/networking/ethtool-netlink.txt b/Documentation/networking/ethtool-netlink.txt
index 205ae4462e9e..b79c26b5e92b 100644
--- a/Documentation/networking/ethtool-netlink.txt
+++ b/Documentation/networking/ethtool-netlink.txt
@@ -125,6 +125,8 @@ which the request applies.
List of message types
---------------------
+ ETHNL_CMD_EVENT notification only
+
All constants use ETHNL_CMD_ prefix, usually followed by "GET", "SET" or "ACT"
to indicate the type.
@@ -136,9 +138,34 @@ messages marked as "response only" in the table above. "Get" messages with
NLM_F_DUMP flags and no device identification dump the information for all
devices supporting the request.
+Type ETHNL_CMD_EVENT is special, these messages are never used in userspace
+requests or kernel replies. They are only sent by kernel to sockets listening
+to "monitor" multicast group to inform userspace about certain events.
+
Later sections describe the format and semantics of these request messages.
+EVENT
+-----
+
+EVENT messages are only used in kernel multicast notifications. Atributes
+correspond to specific event types, the same type can appear multiple times.
+
+ ETHA_EVENT_NEWDEV (nested) new device was registered
+ ETHA_NEWDEV_DEV (nested) new device
+ ETHA_EVENT_DELDEV (nested) device was unregistered
+ ETHA_DELDEV_DEV (nested) removed device
+ ETHA_EVENT_RENAMEDEV (nested) device was renamed
+ ETHA_RENAMEDEV_DEV (nested) renamed device
+
+For ETHA_EVENT_RENAMEDEV, the name ETHA_RENAME_DEV/ETHA_DEV_NAME is the new
+name after the rename.
+
+Userspace application must expect multiple events to be present in one message
+and also multiple events of the same type (e.g. two or more newly registered
+devices).
+
+
Request translation
-------------------
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index b662d75a0636..7e192ad8ce3a 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -7,6 +7,7 @@
enum {
ETHNL_CMD_NOOP,
+ ETHNL_CMD_EVENT, /* only for notifications */
__ETHNL_CMD_CNT,
ETHNL_CMD_MAX = (__ETHNL_CMD_CNT - 1)
@@ -55,6 +56,42 @@ enum {
ETHA_BITSET_MAX = (__ETHA_BITSET_CNT - 1)
};
+/* events */
+
+enum {
+ ETHA_NEWDEV_UNSPEC,
+ ETHA_NEWDEV_DEV, /* nest - ETHA_DEV_* */
+
+ __ETHA_NEWDEV_CNT,
+ ETHA_NEWDEV_MAX = (__ETHA_NEWDEV_CNT - 1)
+};
+
+enum {
+ ETHA_DELDEV_UNSPEC,
+ ETHA_DELDEV_DEV, /* nest - ETHA_DEV_* */
+
+ __ETHA_DELDEV_CNT,
+ ETHA_DELDEV_MAX = (__ETHA_DELDEV_CNT - 1)
+};
+
+enum {
+ ETHA_RENAMEDEV_UNSPEC,
+ ETHA_RENAMEDEV_DEV, /* nest - ETHA_DEV_* */
+
+ __ETHA_RENAMEDEV_CNT,
+ ETHA_RENAMEDEV_MAX = (__ETHA_RENAMEDEV_CNT - 1)
+};
+
+enum {
+ ETHA_EVENT_UNSPEC,
+ ETHA_EVENT_NEWDEV, /* nest - ETHA_NEWDEV_* */
+ ETHA_EVENT_DELDEV, /* nest - ETHA_DELDEV_* */
+ ETHA_EVENT_RENAMEDEV, /* nest - ETHA_RENAMEDEV_* */
+
+ __ETHA_EVENT_CNT,
+ ETHA_EVENT_MAX = (__ETHA_EVENT_CNT - 1)
+};
+
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index a5fa54c2b743..ee3424cd1f90 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -148,6 +148,67 @@ void ethtool_notify(struct net_device *dev, struct netlink_ext_ack *extack,
}
EXPORT_SYMBOL(ethtool_notify);
+/* size of NEWDEV/DELDEV notification */
+static inline unsigned int dev_notify_size(void)
+{
+ return nla_total_size(dev_ident_size());
+}
+
+static void ethnl_notify_devlist(struct netdev_notifier_info *info,
+ u16 ev_type, u16 dev_attr)
+{
+ struct net_device *dev = netdev_notifier_info_to_dev(info);
+ struct sk_buff *skb;
+ struct nlattr *nest;
+ void *ehdr;
+ int ret;
+
+ skb = genlmsg_new(dev_notify_size(), GFP_KERNEL);
+ if (!skb)
+ return;
+ ehdr = genlmsg_put(skb, 0, ++ethnl_bcast_seq, ðtool_genl_family, 0,
+ ETHNL_CMD_EVENT);
+ if (!ehdr)
+ goto out_skb;
+ nest = ethnl_nest_start(skb, ev_type);
+ if (!nest)
+ goto out_skb;
+ ret = ethnl_fill_dev(skb, dev, dev_attr);
+ if (ret < 0)
+ goto out_skb;
+ nla_nest_end(skb, nest);
+ genlmsg_end(skb, ehdr);
+
+ genlmsg_multicast(ðtool_genl_family, skb, 0, ETHNL_MCGRP_MONITOR,
+ GFP_KERNEL);
+ return;
+out_skb:
+ nlmsg_free(skb);
+}
+
+static int ethnl_netdev_event(struct notifier_block *this, unsigned long event,
+ void *ptr)
+{
+ switch (event) {
+ case NETDEV_REGISTER:
+ ethnl_notify_devlist(ptr, ETHA_EVENT_NEWDEV, ETHA_NEWDEV_DEV);
+ break;
+ case NETDEV_UNREGISTER:
+ ethnl_notify_devlist(ptr, ETHA_EVENT_DELDEV, ETHA_DELDEV_DEV);
+ break;
+ case NETDEV_CHANGENAME:
+ ethnl_notify_devlist(ptr, ETHA_EVENT_RENAMEDEV,
+ ETHA_RENAMEDEV_DEV);
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block ethnl_netdev_notifier = {
+ .notifier_call = ethnl_netdev_event,
+};
+
/* genetlink setup */
static const struct genl_ops ethtool_genl_ops[] = {
@@ -179,6 +240,10 @@ static int __init ethnl_init(void)
if (ret < 0)
panic("ethtool: could not register genetlink family\n");
+ ret = register_netdevice_notifier(ðnl_netdev_notifier);
+ if (ret < 0)
+ panic("ethtool: could not register netdev notifier\n");
+
return 0;
}
--
2.20.1
^ permalink raw reply related
* [RFC PATCH net-next v3 10/21] ethtool: provide string sets with GET_STRSET request
From: Michal Kubecek @ 2019-02-18 18:22 UTC (permalink / raw)
To: netdev; +Cc: David Miller, Andrew Lunn, Jakub Kicinski, Jiri Pirko,
linux-kernel
In-Reply-To: <cover.1550513384.git.mkubecek@suse.cz>
Requests a contents of one or more string sets, i.e. indexed arrays of
strings; this information is provided by ETHTOOL_GSSET_INFO and
ETHTOOL_GSTRINGS commands of ioctl interface. There are three types of
requests:
- no NLM_F_DUMP, no device: get "global" stringsets
- no NLM_F_DUMP, with device: get string sets related to the device
- NLM_F_DUMP, no device: get device related string sets for all devices
It's possible to request all string sets of given type or only specific
sets. With ETHA_STRSET_COUNTS flag, only set sizes (number of strings) are
returned.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
---
Documentation/networking/ethtool-netlink.txt | 46 +-
include/uapi/linux/ethtool.h | 2 +
include/uapi/linux/ethtool_netlink.h | 43 ++
net/ethtool/Makefile | 2 +-
net/ethtool/netlink.c | 10 +
net/ethtool/strset.c | 437 +++++++++++++++++++
6 files changed, 537 insertions(+), 3 deletions(-)
create mode 100644 net/ethtool/strset.c
diff --git a/Documentation/networking/ethtool-netlink.txt b/Documentation/networking/ethtool-netlink.txt
index b79c26b5e92b..f0fe4f50db9f 100644
--- a/Documentation/networking/ethtool-netlink.txt
+++ b/Documentation/networking/ethtool-netlink.txt
@@ -126,6 +126,8 @@ List of message types
---------------------
ETHNL_CMD_EVENT notification only
+ ETHNL_CMD_GET_STRSET
+ ETHNL_CMD_SET_STRSET response only
All constants use ETHNL_CMD_ prefix, usually followed by "GET", "SET" or "ACT"
to indicate the type.
@@ -166,6 +168,46 @@ and also multiple events of the same type (e.g. two or more newly registered
devices).
+GET_STRSET
+----------
+
+Requests contents of a string set as provided by ioctl commands
+ETHTOOL_GSSET_INFO and ETHTOOL_GSTRINGS. String sets are not user writeable so
+that the corresponding SET_STRSET message is only used in kernel replies.
+There are two types of string sets: global (independent of a device, e.g.
+device feature names) and device specific (e.g. device private flags).
+
+Request contents:
+
+ ETHA_STRSET_DEV (nested) device identification
+ ETHA_STRSET_COUNTS (flag) request only string counts
+ ETHA_STRSET_STRINGSET (nested) string set to request
+ ETHA_STRINGSET_ID (u32) set id
+
+Kernel response contents:
+
+ ETHA_STRSET_DEV (nested) device identification
+ ETHA_STRSET_STRINGSET (nested) string set to request
+ ETHA_STRINGSET_ID (u32) set id
+ ETHA_STRINGSET_COUNT (u32) number of strings
+ ETHA_STRINGSET_STRINGS (nested) array of strings
+ ETHA_STRING_INDEX (u32) string index
+ ETHA_STRING_VALUE (string) string value
+
+ETHA_STRSET_DEV, if present, identifies the device to request device specific
+string sets for. Depending on its presence a and NLM_F_DUMP flag, there are
+three type of GET_STRSET requests:
+
+ - no NLM_F_DUMP, no device: get "global" stringsets
+ - no NLM_F_DUMP, with device: get string sets related to the device
+ - NLM_F_DUMP, no device: get device related string sets for all devices
+
+If there is no ETHA_STRSET_STRINGSET attribute, all string sets of requested
+type are returned, otherwise only those specified in the request. Flag
+ETHA_STRSET_COUNTS tells kernel to only return string counts of the sets, not
+the actual strings.
+
+
Request translation
-------------------
@@ -200,7 +242,7 @@ ETHTOOL_STXCSUM n/a
ETHTOOL_GSG n/a
ETHTOOL_SSG n/a
ETHTOOL_TEST n/a
-ETHTOOL_GSTRINGS n/a
+ETHTOOL_GSTRINGS ETHNL_CMD_GET_STRSET
ETHTOOL_PHYS_ID n/a
ETHTOOL_GSTATS n/a
ETHTOOL_GTSO n/a
@@ -228,7 +270,7 @@ ETHTOOL_FLASHDEV n/a
ETHTOOL_RESET n/a
ETHTOOL_SRXNTUPLE n/a
ETHTOOL_GRXNTUPLE n/a
-ETHTOOL_GSSET_INFO n/a
+ETHTOOL_GSSET_INFO ETHNL_CMD_GET_STRSET
ETHTOOL_GRXFHINDIR n/a
ETHTOOL_SRXFHINDIR n/a
ETHTOOL_GFEATURES n/a
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index 17be76aeb468..9ea278961d80 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -574,6 +574,8 @@ enum ethtool_stringset {
ETH_SS_TUNABLES,
ETH_SS_PHY_STATS,
ETH_SS_PHY_TUNABLES,
+
+ ETH_SS_COUNT
};
/**
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 7e192ad8ce3a..630b66732dc9 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -8,6 +8,8 @@
enum {
ETHNL_CMD_NOOP,
ETHNL_CMD_EVENT, /* only for notifications */
+ ETHNL_CMD_GET_STRSET,
+ ETHNL_CMD_SET_STRSET, /* only for reply */
__ETHNL_CMD_CNT,
ETHNL_CMD_MAX = (__ETHNL_CMD_CNT - 1)
@@ -92,6 +94,47 @@ enum {
ETHA_EVENT_MAX = (__ETHA_EVENT_CNT - 1)
};
+/* string sets */
+
+enum {
+ ETHA_STRING_UNSPEC,
+ ETHA_STRING_INDEX, /* u32 */
+ ETHA_STRING_VALUE, /* string */
+
+ __ETHA_STRING_CNT,
+ ETHA_STRING_MAX = (__ETHA_STRING_CNT - 1)
+};
+
+enum {
+ ETHA_STRINGS_UNSPEC,
+ ETHA_STRINGS_STRING, /* nest - ETHA_STRINGS_* */
+
+ __ETHA_STRINGS_CNT,
+ ETHA_STRINGS_MAX = (__ETHA_STRINGS_CNT - 1)
+};
+
+enum {
+ ETHA_STRINGSET_UNSPEC,
+ ETHA_STRINGSET_ID, /* u32 */
+ ETHA_STRINGSET_COUNT, /* u32 */
+ ETHA_STRINGSET_STRINGS, /* nest - ETHA_STRINGS_* */
+
+ __ETHA_STRINGSET_CNT,
+ ETHA_STRINGSET_MAX = (__ETHA_STRINGSET_CNT - 1)
+};
+
+/* GET_STRINGSET / SET_STRINGSET */
+
+enum {
+ ETHA_STRSET_UNSPEC,
+ ETHA_STRSET_DEV, /* nest - ETHA_DEV_* */
+ ETHA_STRSET_COUNTS, /* flag */
+ ETHA_STRSET_STRINGSET, /* nest - ETHA_STRSET_* */
+
+ __ETHA_STRSET_CNT,
+ ETHA_STRSET_MAX = (__ETHA_STRSET_CNT - 1)
+};
+
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1
diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile
index 11782306593b..11ceb00821b3 100644
--- a/net/ethtool/Makefile
+++ b/net/ethtool/Makefile
@@ -4,4 +4,4 @@ obj-y += ioctl.o common.o
obj-$(CONFIG_ETHTOOL_NETLINK) += ethtool_nl.o
-ethtool_nl-y := netlink.o bitset.o
+ethtool_nl-y := netlink.o bitset.o strset.o
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 8cdb6f52cb4a..082a9f2aa0a7 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -86,7 +86,10 @@ int ethnl_fill_dev(struct sk_buff *msg, struct net_device *dev, u16 attrtype)
/* GET request helpers */
+extern const struct get_request_ops strset_request_ops;
+
const struct get_request_ops *get_requests[__ETHNL_CMD_CNT] = {
+ [ETHNL_CMD_GET_STRSET] = &strset_request_ops,
};
static struct common_req_info *alloc_get_data(const struct get_request_ops *ops)
@@ -498,6 +501,13 @@ static struct notifier_block ethnl_netdev_notifier = {
/* genetlink setup */
static const struct genl_ops ethtool_genl_ops[] = {
+ {
+ .cmd = ETHNL_CMD_GET_STRSET,
+ .doit = ethnl_get_doit,
+ .start = ethnl_get_start,
+ .dumpit = ethnl_get_dumpit,
+ .done = ethnl_get_done,
+ },
};
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
diff --git a/net/ethtool/strset.c b/net/ethtool/strset.c
new file mode 100644
index 000000000000..a7d0ec2865fb
--- /dev/null
+++ b/net/ethtool/strset.c
@@ -0,0 +1,437 @@
+// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
+
+#include <linux/ethtool.h>
+#include <linux/phy.h>
+#include "netlink.h"
+#include "common.h"
+
+enum strset_type {
+ ETH_SS_TYPE_NONE,
+ ETH_SS_TYPE_LEGACY,
+ ETH_SS_TYPE_SIMPLE,
+};
+
+struct strset_info {
+ enum strset_type type;
+ bool per_dev;
+ bool free_data;
+ unsigned int count;
+ union {
+ const char (*legacy)[ETH_GSTRING_LEN];
+ const char * const *simple;
+ void *ptr;
+ } data;
+};
+
+static const struct strset_info info_template[] = {
+ [ETH_SS_TEST] = {
+ .type = ETH_SS_TYPE_LEGACY,
+ .per_dev = true,
+ },
+ [ETH_SS_STATS] = {
+ .type = ETH_SS_TYPE_LEGACY,
+ .per_dev = true,
+ },
+ [ETH_SS_PRIV_FLAGS] = {
+ .type = ETH_SS_TYPE_LEGACY,
+ .per_dev = true,
+ },
+ [ETH_SS_NTUPLE_FILTERS] = {
+ .type = ETH_SS_TYPE_NONE,
+ },
+ [ETH_SS_FEATURES] = {
+ .type = ETH_SS_TYPE_LEGACY,
+ .per_dev = false,
+ .count = ARRAY_SIZE(netdev_features_strings),
+ .data = { .legacy = netdev_features_strings },
+ },
+ [ETH_SS_RSS_HASH_FUNCS] = {
+ .type = ETH_SS_TYPE_LEGACY,
+ .per_dev = false,
+ .count = ARRAY_SIZE(rss_hash_func_strings),
+ .data = { .legacy = rss_hash_func_strings },
+ },
+ [ETH_SS_TUNABLES] = {
+ .type = ETH_SS_TYPE_LEGACY,
+ .per_dev = false,
+ .count = ARRAY_SIZE(tunable_strings),
+ .data = { .legacy = tunable_strings },
+ },
+ [ETH_SS_PHY_STATS] = {
+ .type = ETH_SS_TYPE_LEGACY,
+ .per_dev = true,
+ },
+ [ETH_SS_PHY_TUNABLES] = {
+ .type = ETH_SS_TYPE_LEGACY,
+ .per_dev = false,
+ .count = ARRAY_SIZE(phy_tunable_strings),
+ .data = { .legacy = phy_tunable_strings },
+ },
+};
+
+struct strset_data {
+ struct common_req_info reqinfo_base;
+ u32 req_ids;
+ bool counts_only;
+
+ /* everything below here will be reset for each device in dumps */
+ struct common_reply_data repdata_base;
+ struct strset_info info[ETH_SS_COUNT];
+};
+
+static const struct nla_policy get_strset_policy[ETHA_STRSET_MAX + 1] = {
+ [ETHA_STRSET_UNSPEC] = { .type = NLA_REJECT },
+ [ETHA_STRSET_DEV] = { .type = NLA_NESTED },
+ [ETHA_STRSET_COUNTS] = { .type = NLA_FLAG },
+ [ETHA_STRSET_STRINGSET] = { .type = NLA_NESTED },
+};
+
+static const struct nla_policy stringset_policy[ETHA_STRINGSET_MAX + 1] = {
+ [ETHA_STRINGSET_UNSPEC] = { .type = NLA_REJECT },
+ [ETHA_STRINGSET_ID] = { .type = NLA_U32 },
+ [ETHA_STRINGSET_COUNT] = { .type = NLA_REJECT },
+ [ETHA_STRINGSET_STRINGS] = { .type = NLA_REJECT },
+};
+
+static bool id_requested(const struct strset_data *data, u32 id)
+{
+ return data->req_ids & (1U << id);
+}
+
+static bool include_set(const struct strset_data *data, u32 id)
+{
+ bool per_dev;
+
+ BUILD_BUG_ON(ETH_SS_COUNT >= BITS_PER_BYTE * sizeof(data->req_ids));
+
+ if (data->req_ids)
+ return id_requested(data, id);
+
+ per_dev = data->info[id].per_dev;
+ if (data->info[id].type == ETH_SS_TYPE_NONE)
+ return false;
+ return data->repdata_base.dev ? per_dev : !per_dev;
+}
+
+const char *str_value(const struct strset_info *info, unsigned int i)
+{
+ switch (info->type) {
+ case ETH_SS_TYPE_LEGACY:
+ return info->data.legacy[i];
+ case ETH_SS_TYPE_SIMPLE:
+ return info->data.simple[i];
+ default:
+ WARN_ONCE(1, "unexpected string set type");
+ return "";
+ }
+}
+
+static int get_strset_id(const struct nlattr *nest, u32 *val,
+ struct genl_info *info)
+{
+ struct nlattr *tb[ETHA_STRINGSET_MAX + 1];
+ int ret;
+
+ ret = nla_parse_nested(tb, ETHA_STRINGSET_MAX, nest, stringset_policy,
+ info ? info->extack : NULL);
+ if (ret < 0)
+ return ret;
+ if (!tb[ETHA_STRINGSET_ID])
+ return -EINVAL;
+
+ *val = nla_get_u32(tb[ETHA_STRINGSET_ID]);
+ return 0;
+}
+
+static int parse_strset(struct common_req_info *req_info, struct sk_buff *skb,
+ struct genl_info *info, const struct nlmsghdr *nlhdr)
+{
+ struct strset_data *data =
+ container_of(req_info, struct strset_data, reqinfo_base);
+ struct nlattr *attr;
+ int rem, ret;
+
+ ret = nlmsg_validate(nlhdr, GENL_HDRLEN, ETHA_STRSET_MAX,
+ get_strset_policy, info ? info->extack : NULL);
+ if (ret < 0)
+ return ret;
+
+ nlmsg_for_each_attr(attr, nlhdr, GENL_HDRLEN, rem) {
+ u32 id;
+
+ switch (nla_type(attr)) {
+ case ETHA_STRSET_DEV:
+ req_info->dev = ethnl_dev_get(info, attr);
+ if (IS_ERR(req_info->dev)) {
+ ret = PTR_ERR(req_info->dev);
+ req_info->dev = NULL;
+ return ret;
+ }
+ break;
+ case ETHA_STRSET_COUNTS:
+ data->counts_only = true;
+ break;
+ case ETHA_STRSET_STRINGSET:
+ ret = get_strset_id(attr, &id, info);
+ if (ret < 0)
+ return ret;
+ if (ret >= ETH_SS_COUNT)
+ return -EOPNOTSUPP;
+ data->req_ids |= (1U << id);
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static void free_strset(struct strset_data *data)
+{
+ unsigned int i;
+
+ for (i = 0; i < ETH_SS_COUNT; i++)
+ if (data->info[i].free_data) {
+ kfree(data->info[i].data.ptr);
+ data->info[i].data.ptr = NULL;
+ data->info[i].free_data = false;
+ }
+}
+
+static int prepare_one_stringset(struct strset_info *info,
+ struct net_device *dev, unsigned int id,
+ bool counts_only)
+{
+ const struct ethtool_ops *ops = dev->ethtool_ops;
+ void *strings;
+ int count, ret;
+
+ if (id == ETH_SS_PHY_STATS && dev->phydev &&
+ !ops->get_ethtool_phy_stats)
+ ret = phy_ethtool_get_sset_count(dev->phydev);
+ else if (ops->get_sset_count && ops->get_strings)
+ ret = ops->get_sset_count(dev, id);
+ else
+ ret = -EOPNOTSUPP;
+ if (ret <= 0) {
+ info->count = 0;
+ return 0;
+ }
+
+ count = ret;
+ if (!counts_only) {
+ strings = kcalloc(count, ETH_GSTRING_LEN, GFP_KERNEL);
+ if (!strings)
+ return -ENOMEM;
+ if (id == ETH_SS_PHY_STATS && dev->phydev &&
+ !ops->get_ethtool_phy_stats)
+ phy_ethtool_get_strings(dev->phydev, strings);
+ else
+ ops->get_strings(dev, id, strings);
+ info->data.legacy = strings;
+ info->free_data = true;
+ }
+ info->count = count;
+
+ return 0;
+}
+
+static int prepare_strset(struct common_req_info *req_info,
+ struct genl_info *info)
+{
+ struct strset_data *data =
+ container_of(req_info, struct strset_data, reqinfo_base);
+ struct net_device *dev = data->repdata_base.dev;
+ unsigned int i;
+ int ret;
+
+ memcpy(&data->info, &info_template, sizeof(data->info));
+
+ if (!dev) {
+ for (i = 0; i < ETH_SS_COUNT; i++) {
+ if (id_requested(data, i) &&
+ data->info[i].per_dev) {
+ ETHNL_SET_ERRMSG(info,
+ "requested per device strings without dev");
+ return -EINVAL;
+ }
+ }
+ }
+
+ ret = ethnl_before_ops(dev);
+ if (ret < 0)
+ goto err_strset;
+ for (i = 0; i < ETH_SS_COUNT; i++) {
+ if (!include_set(data, i) || !data->info[i].per_dev)
+ continue;
+ if (WARN_ONCE(data->info[i].type != ETH_SS_TYPE_LEGACY,
+ "unexpected string set type %u",
+ data->info[i].type))
+ goto err_ops;
+
+ ret = prepare_one_stringset(&data->info[i], dev, i,
+ data->counts_only);
+ if (ret < 0)
+ goto err_ops;
+ }
+ ethnl_after_ops(dev);
+
+ return 0;
+err_ops:
+ ethnl_after_ops(dev);
+err_strset:
+ free_strset(data);
+ return ret;
+}
+
+static int legacy_set_size(const char (*set)[ETH_GSTRING_LEN],
+ unsigned int count)
+{
+ unsigned int len = 0;
+ unsigned int i;
+
+ for (i = 0; i < count; i++)
+ len += nla_total_size(nla_total_size(sizeof(u32)) +
+ ethnl_str_size(set[i]));
+ len = 2 * nla_total_size(sizeof(u32)) + nla_total_size(len);
+
+ return nla_total_size(len);
+}
+
+static int simple_set_size(const char * const *set, unsigned int count)
+{
+ unsigned int len = 0;
+ unsigned int i;
+
+ for (i = 0; i < count; i++)
+ len += nla_total_size(nla_total_size(sizeof(u32)) +
+ ethnl_str_size(set[i]));
+ len = 2 * nla_total_size(sizeof(u32)) + nla_total_size(len);
+
+ return nla_total_size(len);
+}
+
+static int set_size(const struct strset_info *info, bool counts_only)
+{
+ if (info->count == 0)
+ return 0;
+ if (counts_only)
+ return nla_total_size(2 * nla_total_size(sizeof(u32)));
+
+ switch (info->type) {
+ case ETH_SS_TYPE_LEGACY:
+ return legacy_set_size(info->data.legacy, info->count);
+ case ETH_SS_TYPE_SIMPLE:
+ return simple_set_size(info->data.simple, info->count);
+ default:
+ return -EINVAL;
+ };
+}
+
+static int strset_size(const struct common_req_info *req_info)
+{
+ const struct strset_data *data =
+ container_of(req_info, struct strset_data, reqinfo_base);
+ unsigned int i;
+ int len = 0;
+ int ret;
+
+ len += dev_ident_size();
+ for (i = 0; i < ETH_SS_COUNT; i++) {
+ const struct strset_info *info = &data->info[i];
+
+ if (!include_set(data, i) || info->type == ETH_SS_TYPE_NONE)
+ continue;
+
+ ret = set_size(info, data->counts_only);
+ if (ret < 0)
+ return ret;
+ len += ret;
+ }
+
+ return len;
+}
+
+static int fill_string(struct sk_buff *skb, const struct strset_info *info,
+ u32 idx)
+{
+ struct nlattr *string = ethnl_nest_start(skb, ETHA_STRINGS_STRING);
+
+ if (!string)
+ return -EMSGSIZE;
+ if (nla_put_u32(skb, ETHA_STRING_INDEX, idx) ||
+ nla_put_string(skb, ETHA_STRING_VALUE, str_value(info, idx)))
+ return -EMSGSIZE;
+ nla_nest_end(skb, string);
+
+ return 0;
+}
+
+static int fill_set(struct sk_buff *skb, const struct strset_data *data, u32 id)
+{
+ const struct strset_info *info = &data->info[id];
+ struct nlattr *strings;
+ struct nlattr *nest;
+ unsigned int i = (unsigned int)(-1);
+
+ if (info->type == ETH_SS_TYPE_NONE)
+ return -EOPNOTSUPP;
+ if (info->count == 0)
+ return 0;
+ nest = ethnl_nest_start(skb, ETHA_STRSET_STRINGSET);
+ if (!nest)
+ return -EMSGSIZE;
+
+ if (nla_put_u32(skb, ETHA_STRINGSET_ID, id) ||
+ nla_put_u32(skb, ETHA_STRINGSET_COUNT, info->count))
+ goto err;
+
+ if (!data->counts_only) {
+ strings = ethnl_nest_start(skb, ETHA_STRINGSET_STRINGS);
+ if (!strings)
+ goto err;
+ for (i = 0; i < info->count; i++) {
+ if (fill_string(skb, info, i) < 0)
+ goto err;
+ }
+ nla_nest_end(skb, strings);
+ }
+
+ nla_nest_end(skb, nest);
+ return 0;
+
+err:
+ nla_nest_cancel(skb, nest);
+ return -EMSGSIZE;
+}
+
+static int fill_strset(struct sk_buff *skb,
+ const struct common_req_info *req_info)
+{
+ const struct strset_data *data =
+ container_of(req_info, struct strset_data, reqinfo_base);
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < ETH_SS_COUNT; i++)
+ if (include_set(data, i)) {
+ ret = fill_set(skb, data, i);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+const struct get_request_ops strset_request_ops = {
+ .request_cmd = ETHNL_CMD_GET_STRSET,
+ .reply_cmd = ETHNL_CMD_SET_STRSET,
+ .dev_attrtype = ETHA_STRSET_DEV,
+ .data_size = sizeof(struct strset_data),
+ .repdata_offset = offsetof(struct strset_data, repdata_base),
+ .allow_nodev_do = true,
+
+ .parse_request = parse_strset,
+ .prepare_data = prepare_strset,
+ .reply_size = strset_size,
+ .fill_reply = fill_strset,
+};
--
2.20.1
^ permalink raw reply related
* [RFC PATCH net-next v3 11/21] ethtool: provide driver/device information in GET_INFO request
From: Michal Kubecek @ 2019-02-18 18:22 UTC (permalink / raw)
To: netdev; +Cc: David Miller, Andrew Lunn, Jakub Kicinski, Jiri Pirko,
linux-kernel
In-Reply-To: <cover.1550513384.git.mkubecek@suse.cz>
Implement GET_INFO request to get basic driver and device information as
provided by ETHTOOL_GDRVINFO ioct command. The information is read only so
that the corresponding SET_INFO message is only used in kernel replies.
Move most of ethtool_get_drvinfo() int common.c so that the code can be
shared by both ioctl and netlink interface.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
---
Documentation/networking/ethtool-netlink.txt | 43 ++++-
include/uapi/linux/ethtool_netlink.h | 32 ++++
net/ethtool/Makefile | 2 +-
net/ethtool/common.c | 54 +++++++
net/ethtool/common.h | 2 +
net/ethtool/info.c | 155 +++++++++++++++++++
net/ethtool/ioctl.c | 52 +------
net/ethtool/netlink.c | 9 ++
8 files changed, 300 insertions(+), 49 deletions(-)
create mode 100644 net/ethtool/info.c
diff --git a/Documentation/networking/ethtool-netlink.txt b/Documentation/networking/ethtool-netlink.txt
index f0fe4f50db9f..b6999a2167e8 100644
--- a/Documentation/networking/ethtool-netlink.txt
+++ b/Documentation/networking/ethtool-netlink.txt
@@ -128,6 +128,8 @@ List of message types
ETHNL_CMD_EVENT notification only
ETHNL_CMD_GET_STRSET
ETHNL_CMD_SET_STRSET response only
+ ETHNL_CMD_GET_INFO
+ ETHNL_CMD_SET_INFO response only
All constants use ETHNL_CMD_ prefix, usually followed by "GET", "SET" or "ACT"
to indicate the type.
@@ -208,6 +210,45 @@ ETHA_STRSET_COUNTS tells kernel to only return string counts of the sets, not
the actual strings.
+GET_INFO
+--------
+
+GET_INFO requests information provided by ioctl commands ETHTOOL_GDRVINFO,
+ETHTOOL_GPERMADDR and ETHTOOL_GET_TS_INFO to provide basic device information.
+Common pattern is that all information is read only so that SET_INFO message
+exists but is only used by kernel for replies to GET_INFO requests. There is
+also no corresponding notification.
+
+Request contents:
+
+ ETHA_INFO_DEV (nested) device identification
+ ETHA_INFO_INFOMASK (u32) info mask
+ ETHA_INFO_COMPACT (flag) request compact bitsets
+
+Info mask bits meaning:
+
+ ETH_INFO_IM_DRVINFO driver info (GDRVINFO)
+ ETH_INFO_IM_PERMADDR permanent HW address (GPERMADDR)
+ ETH_INFO_IM_TSINFO timestamping info (GET_TS_INFO)
+
+Kernel response contents:
+
+ ETHA_INFO_DEV (nested) device identification
+ ETHA_INFO_DRVINFO (nested) driver information
+ ETHA_DRVINFO_DRIVER (string) driver name
+ ETHA_DRVINFO_FWVERSION (string) firmware version
+ ETHA_DRVINFO_BUSINFO (string) device bus address
+ ETHA_DRVINFO_EROM_VER (string) expansion ROM version
+
+The meaning of DRVINFO attributes follows the corresponding fields of
+ETHTOOL_GDRVINFO response. Second part with various counts and sizes is
+omitted as these are not really needed (and if they are, they can be easily
+found by different means). Driver version is also omitted as it is rather
+misleading in most cases.
+
+GET_INFO requests allow dumps.
+
+
Request translation
-------------------
@@ -219,7 +260,7 @@ ioctl command netlink command
---------------------------------------------------------------------
ETHTOOL_GSET n/a
ETHTOOL_SSET n/a
-ETHTOOL_GDRVINFO n/a
+ETHTOOL_GDRVINFO ETHNL_CMD_GET_INFO
ETHTOOL_GREGS n/a
ETHTOOL_GWOL n/a
ETHTOOL_SWOL n/a
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 630b66732dc9..fdae12b6c6b6 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -10,6 +10,8 @@ enum {
ETHNL_CMD_EVENT, /* only for notifications */
ETHNL_CMD_GET_STRSET,
ETHNL_CMD_SET_STRSET, /* only for reply */
+ ETHNL_CMD_GET_INFO,
+ ETHNL_CMD_SET_INFO, /* only for reply */
__ETHNL_CMD_CNT,
ETHNL_CMD_MAX = (__ETHNL_CMD_CNT - 1)
@@ -135,6 +137,36 @@ enum {
ETHA_STRSET_MAX = (__ETHA_STRSET_CNT - 1)
};
+/* GET_INFO / SET_INFO */
+
+enum {
+ ETHA_INFO_UNSPEC,
+ ETHA_INFO_DEV, /* nest - ETHA_DEV_* */
+ ETHA_INFO_INFOMASK, /* u32 */
+ ETHA_INFO_COMPACT, /* flag */
+ ETHA_INFO_DRVINFO, /* nest - ETHA_DRVINFO_* */
+ ETHA_INFO_PERMADDR, /* nest - ETHA_PERMADDR_* */
+ ETHA_INFO_TSINFO, /* nest - ETHA_TSINFO_* */
+
+ __ETHA_INFO_CNT,
+ ETHA_INFO_MAX = (__ETHA_INFO_CNT - 1)
+};
+
+#define ETH_INFO_IM_DRVINFO 0x01
+
+#define ETH_INFO_IM_ALL 0x01
+
+enum {
+ ETHA_DRVINFO_UNSPEC,
+ ETHA_DRVINFO_DRIVER, /* string */
+ ETHA_DRVINFO_FWVERSION, /* string */
+ ETHA_DRVINFO_BUSINFO, /* string */
+ ETHA_DRVINFO_EROM_VER, /* string */
+
+ __ETHA_DRVINFO_CNT,
+ ETHA_DRVINFO_MAX = (__ETHA_DRVINFO_CNT - 1)
+};
+
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1
diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile
index 11ceb00821b3..96d41dc45d4f 100644
--- a/net/ethtool/Makefile
+++ b/net/ethtool/Makefile
@@ -4,4 +4,4 @@ obj-y += ioctl.o common.o
obj-$(CONFIG_ETHTOOL_NETLINK) += ethtool_nl.o
-ethtool_nl-y := netlink.o bitset.o strset.o
+ethtool_nl-y := netlink.o bitset.o strset.o info.o
diff --git a/net/ethtool/common.c b/net/ethtool/common.c
index 73f721a1c557..e0bd7c6c5874 100644
--- a/net/ethtool/common.c
+++ b/net/ethtool/common.c
@@ -1,5 +1,7 @@
// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
+#include <linux/rtnetlink.h>
+#include <net/devlink.h>
#include "common.h"
const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
@@ -81,3 +83,55 @@ phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
[ETHTOOL_ID_UNSPEC] = "Unspec",
[ETHTOOL_PHY_DOWNSHIFT] = "phy-downshift",
};
+
+int __ethtool_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
+{
+ const struct ethtool_ops *ops = dev->ethtool_ops;
+
+ memset(info, 0, sizeof(*info));
+ info->cmd = ETHTOOL_GDRVINFO;
+ if (ops->get_drvinfo) {
+ ops->get_drvinfo(dev, info);
+ } else if (dev->dev.parent && dev->dev.parent->driver) {
+ strlcpy(info->bus_info, dev_name(dev->dev.parent),
+ sizeof(info->bus_info));
+ strlcpy(info->driver, dev->dev.parent->driver->name,
+ sizeof(info->driver));
+ } else {
+ return -EOPNOTSUPP;
+ }
+
+ /* this method of obtaining string set info is deprecated;
+ * Use ETHTOOL_GSSET_INFO instead.
+ */
+ if (ops->get_sset_count) {
+ int rc;
+
+ rc = ops->get_sset_count(dev, ETH_SS_TEST);
+ if (rc >= 0)
+ info->testinfo_len = rc;
+ rc = ops->get_sset_count(dev, ETH_SS_STATS);
+ if (rc >= 0)
+ info->n_stats = rc;
+ rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
+ if (rc >= 0)
+ info->n_priv_flags = rc;
+ }
+ if (ops->get_regs_len) {
+ int ret = ops->get_regs_len(dev);
+
+ if (ret > 0)
+ info->regdump_len = ret;
+ }
+
+ if (ops->get_eeprom_len)
+ info->eedump_len = ops->get_eeprom_len(dev);
+
+ rtnl_unlock();
+ if (!info->fw_version[0])
+ devlink_compat_running_version(dev, info->fw_version,
+ sizeof(info->fw_version));
+ rtnl_lock();
+
+ return 0;
+}
diff --git a/net/ethtool/common.h b/net/ethtool/common.h
index 41b2efc1e4e1..e87e58b3a274 100644
--- a/net/ethtool/common.h
+++ b/net/ethtool/common.h
@@ -3,6 +3,7 @@
#ifndef _ETHTOOL_COMMON_H
#define _ETHTOOL_COMMON_H
+#include <linux/netdevice.h>
#include <linux/ethtool.h>
extern const char
@@ -14,4 +15,5 @@ tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN];
extern const char
phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN];
+int __ethtool_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info);
#endif /* _ETHTOOL_COMMON_H */
diff --git a/net/ethtool/info.c b/net/ethtool/info.c
new file mode 100644
index 000000000000..1a2e78d238e3
--- /dev/null
+++ b/net/ethtool/info.c
@@ -0,0 +1,155 @@
+// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
+
+#include "netlink.h"
+#include "common.h"
+#include "bitset.h"
+
+struct info_data {
+ struct common_req_info reqinfo_base;
+
+ /* everything below here will be reset for each device in dumps */
+ struct common_reply_data repdata_base;
+ struct ethtool_drvinfo drvinfo;
+};
+
+static const struct nla_policy get_info_policy[ETHA_INFO_MAX + 1] = {
+ [ETHA_INFO_UNSPEC] = { .type = NLA_REJECT },
+ [ETHA_INFO_DEV] = { .type = NLA_NESTED },
+ [ETHA_INFO_INFOMASK] = { .type = NLA_U32 },
+ [ETHA_INFO_COMPACT] = { .type = NLA_FLAG },
+ [ETHA_INFO_DRVINFO] = { .type = NLA_REJECT },
+};
+
+static int parse_info(struct common_req_info *req_info, struct sk_buff *skb,
+ struct genl_info *info, const struct nlmsghdr *nlhdr)
+{
+ struct nlattr *tb[ETHA_INFO_MAX + 1];
+ int ret;
+
+ ret = genlmsg_parse(nlhdr, ðtool_genl_family, tb, ETHA_INFO_MAX,
+ get_info_policy, info ? info->extack : NULL);
+ if (ret < 0)
+ return ret;
+
+ if (tb[ETHA_INFO_DEV]) {
+ req_info->dev = ethnl_dev_get(info, tb[ETHA_INFO_DEV]);
+ if (IS_ERR(req_info->dev)) {
+ ret = PTR_ERR(req_info->dev);
+ req_info->dev = NULL;
+ return ret;
+ }
+ }
+ if (tb[ETHA_INFO_INFOMASK])
+ req_info->req_mask = nla_get_u32(tb[ETHA_INFO_INFOMASK]);
+ if (tb[ETHA_INFO_COMPACT])
+ req_info->compact = true;
+ if (req_info->req_mask == 0)
+ req_info->req_mask = ETH_INFO_IM_ALL;
+
+ return 0;
+}
+
+static int prepare_info(struct common_req_info *req_info,
+ struct genl_info *info)
+{
+ struct info_data *data =
+ container_of(req_info, struct info_data, reqinfo_base);
+ struct net_device *dev = data->repdata_base.dev;
+ u32 req_mask = req_info->req_mask & ETH_INFO_IM_ALL;
+ int ret;
+
+ ret = ethnl_before_ops(dev);
+ if (ret < 0)
+ return ret;
+ if (req_mask & ETH_INFO_IM_DRVINFO) {
+ ret = __ethtool_get_drvinfo(dev, &data->drvinfo);
+ if (ret < 0)
+ req_mask &= ~ETH_INFO_IM_DRVINFO;
+ }
+ ethnl_after_ops(dev);
+
+ data->repdata_base.info_mask = req_mask;
+ if (req_info->req_mask & ~req_mask)
+ warn_partial_info(info);
+ return 0;
+}
+
+static int drvinfo_size(const struct ethtool_drvinfo *drvinfo)
+{
+ int len = 0;
+
+ len += ethnl_str_ifne_size(drvinfo->driver);
+ len += ethnl_str_ifne_size(drvinfo->fw_version);
+ len += ethnl_str_ifne_size(drvinfo->bus_info);
+ len += ethnl_str_ifne_size(drvinfo->erom_version);
+
+ return nla_total_size(len);
+}
+
+static int info_size(const struct common_req_info *req_info)
+{
+ const struct info_data *data =
+ container_of(req_info, struct info_data, reqinfo_base);
+ u32 info_mask = data->repdata_base.info_mask;
+ int len = 0;
+
+ len += dev_ident_size();
+ if (info_mask & ETH_INFO_IM_DRVINFO)
+ len += drvinfo_size(&data->drvinfo);
+
+ return len;
+}
+
+static int fill_drvinfo(struct sk_buff *skb,
+ const struct ethtool_drvinfo *drvinfo)
+{
+ struct nlattr *nest = ethnl_nest_start(skb, ETHA_INFO_DRVINFO);
+ int ret;
+
+ if (!nest)
+ return -EMSGSIZE;
+ ret = -EMSGSIZE;
+ if (ethnl_put_str_ifne(skb, ETHA_DRVINFO_DRIVER, drvinfo->driver) ||
+ ethnl_put_str_ifne(skb, ETHA_DRVINFO_FWVERSION,
+ drvinfo->fw_version) ||
+ ethnl_put_str_ifne(skb, ETHA_DRVINFO_BUSINFO, drvinfo->bus_info) ||
+ ethnl_put_str_ifne(skb, ETHA_DRVINFO_EROM_VER,
+ drvinfo->erom_version))
+ goto err;
+
+ nla_nest_end(skb, nest);
+ return 0;
+err:
+ nla_nest_cancel(skb, nest);
+ return ret;
+}
+
+static int fill_info(struct sk_buff *skb,
+ const struct common_req_info *req_info)
+{
+ const struct info_data *data =
+ container_of(req_info, struct info_data, reqinfo_base);
+ u32 info_mask = data->repdata_base.info_mask;
+ int ret;
+
+ if (info_mask & ETH_INFO_IM_DRVINFO) {
+ ret = fill_drvinfo(skb, &data->drvinfo);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+const struct get_request_ops info_request_ops = {
+ .request_cmd = ETHNL_CMD_GET_INFO,
+ .reply_cmd = ETHNL_CMD_SET_INFO,
+ .dev_attrtype = ETHA_INFO_DEV,
+ .data_size = sizeof(struct info_data),
+ .repdata_offset = offsetof(struct info_data, repdata_base),
+
+ .parse_request = parse_info,
+ .prepare_data = prepare_info,
+ .reply_size = info_size,
+ .fill_reply = fill_info,
+};
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index 71a1643adb2b..c883239001a4 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -685,56 +685,14 @@ static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
void __user *useraddr)
{
struct ethtool_drvinfo info;
- const struct ethtool_ops *ops = dev->ethtool_ops;
-
- memset(&info, 0, sizeof(info));
- info.cmd = ETHTOOL_GDRVINFO;
- if (ops->get_drvinfo) {
- ops->get_drvinfo(dev, &info);
- } else if (dev->dev.parent && dev->dev.parent->driver) {
- strlcpy(info.bus_info, dev_name(dev->dev.parent),
- sizeof(info.bus_info));
- strlcpy(info.driver, dev->dev.parent->driver->name,
- sizeof(info.driver));
- } else {
- return -EOPNOTSUPP;
- }
-
- /*
- * this method of obtaining string set info is deprecated;
- * Use ETHTOOL_GSSET_INFO instead.
- */
- if (ops->get_sset_count) {
- int rc;
-
- rc = ops->get_sset_count(dev, ETH_SS_TEST);
- if (rc >= 0)
- info.testinfo_len = rc;
- rc = ops->get_sset_count(dev, ETH_SS_STATS);
- if (rc >= 0)
- info.n_stats = rc;
- rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
- if (rc >= 0)
- info.n_priv_flags = rc;
- }
- if (ops->get_regs_len) {
- int ret = ops->get_regs_len(dev);
-
- if (ret > 0)
- info.regdump_len = ret;
- }
-
- if (ops->get_eeprom_len)
- info.eedump_len = ops->get_eeprom_len(dev);
-
- rtnl_unlock();
- if (!info.fw_version[0])
- devlink_compat_running_version(dev, info.fw_version,
- sizeof(info.fw_version));
- rtnl_lock();
+ int rc;
+ rc = __ethtool_get_drvinfo(dev, &info);
+ if (rc < 0)
+ return rc;
if (copy_to_user(useraddr, &info, sizeof(info)))
return -EFAULT;
+
return 0;
}
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 082a9f2aa0a7..e27dec427414 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -87,9 +87,11 @@ int ethnl_fill_dev(struct sk_buff *msg, struct net_device *dev, u16 attrtype)
/* GET request helpers */
extern const struct get_request_ops strset_request_ops;
+extern const struct get_request_ops info_request_ops;
const struct get_request_ops *get_requests[__ETHNL_CMD_CNT] = {
[ETHNL_CMD_GET_STRSET] = &strset_request_ops,
+ [ETHNL_CMD_GET_INFO] = &info_request_ops,
};
static struct common_req_info *alloc_get_data(const struct get_request_ops *ops)
@@ -508,6 +510,13 @@ static const struct genl_ops ethtool_genl_ops[] = {
.dumpit = ethnl_get_dumpit,
.done = ethnl_get_done,
},
+ {
+ .cmd = ETHNL_CMD_GET_INFO,
+ .doit = ethnl_get_doit,
+ .start = ethnl_get_start,
+ .dumpit = ethnl_get_dumpit,
+ .done = ethnl_get_done,
+ },
};
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
--
2.20.1
^ permalink raw reply related
* [RFC PATCH net-next v3 12/21] ethtool: provide permanent hardware address in GET_INFO request
From: Michal Kubecek @ 2019-02-18 18:22 UTC (permalink / raw)
To: netdev; +Cc: David Miller, Andrew Lunn, Jakub Kicinski, Jiri Pirko,
linux-kernel
In-Reply-To: <cover.1550513384.git.mkubecek@suse.cz>
Add information about permanent hadware address of a device (as provided by
ETHTOOL_GPERMADDR ioctl command) in GET_INFO reply if ETH_INFO_IM_PERMADDR
flag is set in the request.
There is no separate attribute for hardware address length as nla_len gives
this information. The reply also provides address type (net_device::type).
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
---
Documentation/networking/ethtool-netlink.txt | 9 ++++-
include/uapi/linux/ethtool_netlink.h | 12 +++++-
net/ethtool/info.c | 39 ++++++++++++++++++++
3 files changed, 58 insertions(+), 2 deletions(-)
diff --git a/Documentation/networking/ethtool-netlink.txt b/Documentation/networking/ethtool-netlink.txt
index b6999a2167e8..1e615e111262 100644
--- a/Documentation/networking/ethtool-netlink.txt
+++ b/Documentation/networking/ethtool-netlink.txt
@@ -239,6 +239,9 @@ Kernel response contents:
ETHA_DRVINFO_FWVERSION (string) firmware version
ETHA_DRVINFO_BUSINFO (string) device bus address
ETHA_DRVINFO_EROM_VER (string) expansion ROM version
+ ETHA_INFO_PERMADDR (nested)
+ ETHA_PERMADDR_ADDRESS (binary) permanent HW address
+ ETHA_PERMADDR_TYPE (u16) dev->type
The meaning of DRVINFO attributes follows the corresponding fields of
ETHTOOL_GDRVINFO response. Second part with various counts and sizes is
@@ -246,6 +249,10 @@ omitted as these are not really needed (and if they are, they can be easily
found by different means). Driver version is also omitted as it is rather
misleading in most cases.
+There is no separate attribute for permanent address length as the length can
+be determined from attribute length (nla_len()). ETHA_PERMADDR_TYPE provides
+net_device::type value to give a hint about what kind of address device has.
+
GET_INFO requests allow dumps.
@@ -288,7 +295,7 @@ ETHTOOL_PHYS_ID n/a
ETHTOOL_GSTATS n/a
ETHTOOL_GTSO n/a
ETHTOOL_STSO n/a
-ETHTOOL_GPERMADDR n/a
+ETHTOOL_GPERMADDR ETHNL_CMD_GET_INFO
ETHTOOL_GUFO n/a
ETHTOOL_SUFO n/a
ETHTOOL_GGSO n/a
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index fdae12b6c6b6..fb756b6a8592 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -153,8 +153,9 @@ enum {
};
#define ETH_INFO_IM_DRVINFO 0x01
+#define ETH_INFO_IM_PERMADDR 0x02
-#define ETH_INFO_IM_ALL 0x01
+#define ETH_INFO_IM_ALL 0x03
enum {
ETHA_DRVINFO_UNSPEC,
@@ -167,6 +168,15 @@ enum {
ETHA_DRVINFO_MAX = (__ETHA_DRVINFO_CNT - 1)
};
+enum {
+ ETHA_PERMADDR_UNSPEC,
+ ETHA_PERMADDR_ADDRESS, /* binary */
+ ETHA_PERMADDR_TYPE, /* u16 */
+
+ __ETHA_PERMADDR_CNT,
+ ETHA_PERMADDR_MAX = (__ETHA_PERMADDR_CNT - 1)
+};
+
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1
diff --git a/net/ethtool/info.c b/net/ethtool/info.c
index 1a2e78d238e3..05dbd87ebc41 100644
--- a/net/ethtool/info.c
+++ b/net/ethtool/info.c
@@ -18,6 +18,7 @@ static const struct nla_policy get_info_policy[ETHA_INFO_MAX + 1] = {
[ETHA_INFO_INFOMASK] = { .type = NLA_U32 },
[ETHA_INFO_COMPACT] = { .type = NLA_FLAG },
[ETHA_INFO_DRVINFO] = { .type = NLA_REJECT },
+ [ETHA_INFO_PERMADDR] = { .type = NLA_REJECT },
};
static int parse_info(struct common_req_info *req_info, struct sk_buff *skb,
@@ -86,16 +87,29 @@ static int drvinfo_size(const struct ethtool_drvinfo *drvinfo)
return nla_total_size(len);
}
+static int permaddr_size(const struct net_device *dev)
+{
+ int len = 0;
+
+ len += nla_total_size(dev->addr_len);
+ len += nla_total_size(sizeof(u16));
+
+ return nla_total_size(len);
+}
+
static int info_size(const struct common_req_info *req_info)
{
const struct info_data *data =
container_of(req_info, struct info_data, reqinfo_base);
+ const struct net_device *dev = data->repdata_base.dev;
u32 info_mask = data->repdata_base.info_mask;
int len = 0;
len += dev_ident_size();
if (info_mask & ETH_INFO_IM_DRVINFO)
len += drvinfo_size(&data->drvinfo);
+ if (info_mask & ETH_INFO_IM_PERMADDR)
+ len += permaddr_size(dev);
return len;
}
@@ -124,6 +138,26 @@ static int fill_drvinfo(struct sk_buff *skb,
return ret;
}
+static int fill_permaddr(struct sk_buff *skb, const struct net_device *dev)
+{
+ struct nlattr *nest = ethnl_nest_start(skb, ETHA_INFO_PERMADDR);
+ int ret;
+
+ if (!nest)
+ return -EMSGSIZE;
+ ret = -EMSGSIZE;
+ if (nla_put(skb, ETHA_PERMADDR_ADDRESS, dev->addr_len, dev->perm_addr))
+ goto err;
+ if (nla_put_u16(skb, ETHA_PERMADDR_TYPE, dev->type))
+ goto err;
+
+ nla_nest_end(skb, nest);
+ return 0;
+err:
+ nla_nest_cancel(skb, nest);
+ return ret;
+}
+
static int fill_info(struct sk_buff *skb,
const struct common_req_info *req_info)
{
@@ -137,6 +171,11 @@ static int fill_info(struct sk_buff *skb,
if (ret < 0)
return ret;
}
+ if (info_mask & ETH_INFO_IM_PERMADDR) {
+ ret = fill_permaddr(skb, data->repdata_base.dev);
+ if (ret < 0)
+ return ret;
+ }
return 0;
}
--
2.20.1
^ permalink raw reply related
* [RFC PATCH net-next v3 13/21] ethtool: provide timestamping information in GET_INFO request
From: Michal Kubecek @ 2019-02-18 18:22 UTC (permalink / raw)
To: netdev; +Cc: David Miller, Andrew Lunn, Jakub Kicinski, Jiri Pirko,
linux-kernel
In-Reply-To: <cover.1550513384.git.mkubecek@suse.cz>
Add timestamping information as provided by ETHTOOL_GET_TS_INFO ioctl
command in GET_INFO reply if ETH_INFO_IM_TSINFO flag is set in the request.
Add constants for counts of HWTSTAMP_TX_* and HWTSTAM_FILTER_* constants
and provide symbolic names for timestamping related values so that they can
be retrieved in GET_STRSET and GET_INFO requests.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
---
Documentation/networking/ethtool-netlink.txt | 10 +-
include/uapi/linux/ethtool.h | 6 +
include/uapi/linux/ethtool_netlink.h | 14 +-
include/uapi/linux/net_tstamp.h | 13 ++
net/ethtool/common.c | 24 ++++
net/ethtool/common.h | 2 +
net/ethtool/info.c | 138 +++++++++++++++++++
net/ethtool/ioctl.c | 20 +--
net/ethtool/netlink.h | 9 ++
net/ethtool/strset.c | 18 +++
10 files changed, 234 insertions(+), 20 deletions(-)
diff --git a/Documentation/networking/ethtool-netlink.txt b/Documentation/networking/ethtool-netlink.txt
index 1e615e111262..c6c7475340e2 100644
--- a/Documentation/networking/ethtool-netlink.txt
+++ b/Documentation/networking/ethtool-netlink.txt
@@ -242,6 +242,11 @@ Kernel response contents:
ETHA_INFO_PERMADDR (nested)
ETHA_PERMADDR_ADDRESS (binary) permanent HW address
ETHA_PERMADDR_TYPE (u16) dev->type
+ ETHA_INFO_TSINFO (nested) timestamping information
+ ETHA_TSINFO_TIMESTAMPING (bitset) supported flags
+ ETHA_TSINFO_PHC_INDEX (u32) associated PHC
+ ETHA_TSINFO_TX_TYPES (bitset) Tx types
+ ETHA_TSINFO_RX_FILTERS (bitset) Rx filters
The meaning of DRVINFO attributes follows the corresponding fields of
ETHTOOL_GDRVINFO response. Second part with various counts and sizes is
@@ -253,6 +258,9 @@ There is no separate attribute for permanent address length as the length can
be determined from attribute length (nla_len()). ETHA_PERMADDR_TYPE provides
net_device::type value to give a hint about what kind of address device has.
+ETHA_TSINFO_PHC_INDEX can be unsigned as there is no need for special value;
+if no PHC is associated, the attribute is not present.
+
GET_INFO requests allow dumps.
@@ -328,7 +336,7 @@ ETHTOOL_SCHANNELS n/a
ETHTOOL_SET_DUMP n/a
ETHTOOL_GET_DUMP_FLAG n/a
ETHTOOL_GET_DUMP_DATA n/a
-ETHTOOL_GET_TS_INFO n/a
+ETHTOOL_GET_TS_INFO ETHNL_CMD_GET_INFO
ETHTOOL_GMODULEINFO n/a
ETHTOOL_GMODULEEEPROM n/a
ETHTOOL_GEEE n/a
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index 9ea278961d80..1b58637d3a4d 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -563,6 +563,9 @@ struct ethtool_pauseparam {
* @ETH_SS_RSS_HASH_FUNCS: RSS hush function names
* @ETH_SS_PHY_STATS: Statistic names, for use with %ETHTOOL_GPHYSTATS
* @ETH_SS_PHY_TUNABLES: PHY tunable names
+ * @ETH_SS_TSTAMP_SOF: timestamping flag names
+ * @ETH_SS_TSTAMP_TX_TYPE: timestamping Tx type names
+ * @ETH_SS_TSTAMP_RX_FILTER: timestamping Rx filter names
*/
enum ethtool_stringset {
ETH_SS_TEST = 0,
@@ -574,6 +577,9 @@ enum ethtool_stringset {
ETH_SS_TUNABLES,
ETH_SS_PHY_STATS,
ETH_SS_PHY_TUNABLES,
+ ETH_SS_TSTAMP_SOF,
+ ETH_SS_TSTAMP_TX_TYPE,
+ ETH_SS_TSTAMP_RX_FILTER,
ETH_SS_COUNT
};
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index fb756b6a8592..8ab2b7454e81 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -154,8 +154,9 @@ enum {
#define ETH_INFO_IM_DRVINFO 0x01
#define ETH_INFO_IM_PERMADDR 0x02
+#define ETH_INFO_IM_TSINFO 0x04
-#define ETH_INFO_IM_ALL 0x03
+#define ETH_INFO_IM_ALL 0x07
enum {
ETHA_DRVINFO_UNSPEC,
@@ -177,6 +178,17 @@ enum {
ETHA_PERMADDR_MAX = (__ETHA_PERMADDR_CNT - 1)
};
+enum {
+ ETHA_TSINFO_UNSPEC,
+ ETHA_TSINFO_TIMESTAMPING, /* bitset */
+ ETHA_TSINFO_PHC_INDEX, /* u32 */
+ ETHA_TSINFO_TX_TYPES, /* bitset */
+ ETHA_TSINFO_RX_FILTERS, /* bitset */
+
+ __ETHA_TSINFO_CNT,
+ ETHA_TSINFO_MAX = (__ETHA_TSINFO_CNT - 1)
+};
+
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1
diff --git a/include/uapi/linux/net_tstamp.h b/include/uapi/linux/net_tstamp.h
index e5b39721c6e4..e5b0472c4416 100644
--- a/include/uapi/linux/net_tstamp.h
+++ b/include/uapi/linux/net_tstamp.h
@@ -30,6 +30,9 @@ enum {
SOF_TIMESTAMPING_OPT_STATS = (1<<12),
SOF_TIMESTAMPING_OPT_PKTINFO = (1<<13),
SOF_TIMESTAMPING_OPT_TX_SWHW = (1<<14),
+ /* when adding a flag, please update so_timestamping_labels array
+ * in net/ethtool/info.c
+ */
SOF_TIMESTAMPING_LAST = SOF_TIMESTAMPING_OPT_TX_SWHW,
SOF_TIMESTAMPING_MASK = (SOF_TIMESTAMPING_LAST - 1) |
@@ -90,6 +93,11 @@ enum hwtstamp_tx_types {
* queue.
*/
HWTSTAMP_TX_ONESTEP_SYNC,
+ /* when adding a value, please update tstamp_tx_type_labels array
+ * in net/ethtool/info.c
+ */
+
+ HWTSTAMP_TX_LAST = HWTSTAMP_TX_ONESTEP_SYNC
};
/* possible values for hwtstamp_config->rx_filter */
@@ -132,6 +140,11 @@ enum hwtstamp_rx_filters {
/* NTP, UDP, all versions and packet modes */
HWTSTAMP_FILTER_NTP_ALL,
+ /* when adding a value, please update tstamp_rx_filter_labels array
+ * in net/ethtool/info.c
+ */
+
+ HWTSTAMP_FILTER_LAST = HWTSTAMP_FILTER_NTP_ALL
};
/* SCM_TIMESTAMPING_PKTINFO control message */
diff --git a/net/ethtool/common.c b/net/ethtool/common.c
index e0bd7c6c5874..4616816861cc 100644
--- a/net/ethtool/common.c
+++ b/net/ethtool/common.c
@@ -1,6 +1,8 @@
// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
#include <linux/rtnetlink.h>
+#include <linux/phy.h>
+#include <linux/net_tstamp.h>
#include <net/devlink.h>
#include "common.h"
@@ -135,3 +137,25 @@ int __ethtool_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
return 0;
}
+
+int __ethtool_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
+{
+ const struct ethtool_ops *ops = dev->ethtool_ops;
+ struct phy_device *phydev = dev->phydev;
+ int err = 0;
+
+ memset(info, 0, sizeof(*info));
+ info->cmd = ETHTOOL_GET_TS_INFO;
+
+ if (phydev && phydev->drv && phydev->drv->ts_info) {
+ err = phydev->drv->ts_info(phydev, info);
+ } else if (ops->get_ts_info) {
+ err = ops->get_ts_info(dev, info);
+ } else {
+ info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
+ SOF_TIMESTAMPING_SOFTWARE;
+ info->phc_index = -1;
+ }
+
+ return err;
+}
diff --git a/net/ethtool/common.h b/net/ethtool/common.h
index e87e58b3a274..02cbee79da35 100644
--- a/net/ethtool/common.h
+++ b/net/ethtool/common.h
@@ -16,4 +16,6 @@ extern const char
phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN];
int __ethtool_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info);
+int __ethtool_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info);
+
#endif /* _ETHTOOL_COMMON_H */
diff --git a/net/ethtool/info.c b/net/ethtool/info.c
index 05dbd87ebc41..838257db1d31 100644
--- a/net/ethtool/info.c
+++ b/net/ethtool/info.c
@@ -1,15 +1,61 @@
// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
+#include <linux/net_tstamp.h>
+
#include "netlink.h"
#include "common.h"
#include "bitset.h"
+const char *const so_timestamping_labels[] = {
+ "hardware-transmit", /* SOF_TIMESTAMPING_TX_HARDWARE */
+ "software-transmit", /* SOF_TIMESTAMPING_TX_SOFTWARE */
+ "hardware-receive", /* SOF_TIMESTAMPING_RX_HARDWARE */
+ "software-receive", /* SOF_TIMESTAMPING_RX_SOFTWARE */
+ "software-system-clock", /* SOF_TIMESTAMPING_SOFTWARE */
+ "hardware-legacy-clock", /* SOF_TIMESTAMPING_SYS_HARDWARE */
+ "hardware-raw-clock", /* SOF_TIMESTAMPING_RAW_HARDWARE */
+ "option-id", /* SOF_TIMESTAMPING_OPT_ID */
+ "sched-transmit", /* SOF_TIMESTAMPING_TX_SCHED */
+ "ack-transmit", /* SOF_TIMESTAMPING_TX_ACK */
+ "option-cmsg", /* SOF_TIMESTAMPING_OPT_CMSG */
+ "option-tsonly", /* SOF_TIMESTAMPING_OPT_TSONLY */
+ "option-stats", /* SOF_TIMESTAMPING_OPT_STATS */
+ "option-pktinfo", /* SOF_TIMESTAMPING_OPT_PKTINFO */
+ "option-tx-swhw", /* SOF_TIMESTAMPING_OPT_TX_SWHW */
+};
+
+const char *const tstamp_tx_type_labels[] = {
+ [HWTSTAMP_TX_OFF] = "off",
+ [HWTSTAMP_TX_ON] = "on",
+ [HWTSTAMP_TX_ONESTEP_SYNC] = "one-step-sync",
+};
+
+const char *const tstamp_rx_filter_labels[] = {
+ [HWTSTAMP_FILTER_NONE] = "none",
+ [HWTSTAMP_FILTER_ALL] = "all",
+ [HWTSTAMP_FILTER_SOME] = "some",
+ [HWTSTAMP_FILTER_PTP_V1_L4_EVENT] = "ptpv1-l4-event",
+ [HWTSTAMP_FILTER_PTP_V1_L4_SYNC] = "ptpv1-l4-sync",
+ [HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ] = "ptpv1-l4-delay-req",
+ [HWTSTAMP_FILTER_PTP_V2_L4_EVENT] = "ptpv2-l4-event",
+ [HWTSTAMP_FILTER_PTP_V2_L4_SYNC] = "ptpv2-l4-sync",
+ [HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ] = "ptpv2-l4-delay-req",
+ [HWTSTAMP_FILTER_PTP_V2_L2_EVENT] = "ptpv2-l2-event",
+ [HWTSTAMP_FILTER_PTP_V2_L2_SYNC] = "ptpv2-l2-sync",
+ [HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ] = "ptpv2-l2-delay-req",
+ [HWTSTAMP_FILTER_PTP_V2_EVENT] = "ptpv2-event",
+ [HWTSTAMP_FILTER_PTP_V2_SYNC] = "ptpv2-sync",
+ [HWTSTAMP_FILTER_PTP_V2_DELAY_REQ] = "ptpv2-delay-req",
+ [HWTSTAMP_FILTER_NTP_ALL] = "ntp-all",
+};
+
struct info_data {
struct common_req_info reqinfo_base;
/* everything below here will be reset for each device in dumps */
struct common_reply_data repdata_base;
struct ethtool_drvinfo drvinfo;
+ struct ethtool_ts_info tsinfo;
};
static const struct nla_policy get_info_policy[ETHA_INFO_MAX + 1] = {
@@ -19,6 +65,7 @@ static const struct nla_policy get_info_policy[ETHA_INFO_MAX + 1] = {
[ETHA_INFO_COMPACT] = { .type = NLA_FLAG },
[ETHA_INFO_DRVINFO] = { .type = NLA_REJECT },
[ETHA_INFO_PERMADDR] = { .type = NLA_REJECT },
+ [ETHA_INFO_TSINFO] = { .type = NLA_REJECT },
};
static int parse_info(struct common_req_info *req_info, struct sk_buff *skb,
@@ -67,6 +114,11 @@ static int prepare_info(struct common_req_info *req_info,
if (ret < 0)
req_mask &= ~ETH_INFO_IM_DRVINFO;
}
+ if (req_mask & ETH_INFO_IM_TSINFO) {
+ ret = __ethtool_get_ts_info(dev, &data->tsinfo);
+ if (ret < 0)
+ req_mask &= ~ETH_INFO_IM_TSINFO;
+ }
ethnl_after_ops(dev);
data->repdata_base.info_mask = req_mask;
@@ -97,6 +149,42 @@ static int permaddr_size(const struct net_device *dev)
return nla_total_size(len);
}
+static int tsinfo_size(const struct ethtool_ts_info *tsinfo, bool compact)
+{
+ const unsigned int flags = compact ? ETHNL_BITSET_COMPACT : 0;
+ int len = 0;
+ int ret;
+
+ /* if any of these exceeds 32, we need a different interface to talk to
+ * NIC drivers anyway
+ */
+ BUILD_BUG_ON(__SOF_TIMESTAMPING_COUNT > 32);
+ BUILD_BUG_ON(__HWTSTAMP_TX_COUNT > 32);
+ BUILD_BUG_ON(__HWTSTAMP_FILTER_COUNT > 32);
+
+ ret = ethnl_bitset32_size(__SOF_TIMESTAMPING_COUNT,
+ &tsinfo->so_timestamping, NULL,
+ so_timestamping_labels, flags);
+ if (ret < 0)
+ return ret;
+ len += ret;
+ ret = ethnl_bitset32_size(__HWTSTAMP_TX_COUNT,
+ &tsinfo->tx_types, NULL,
+ tstamp_tx_type_labels, flags);
+ if (ret < 0)
+ return ret;
+ len += ret;
+ ret = ethnl_bitset32_size(__HWTSTAMP_FILTER_COUNT,
+ &tsinfo->rx_filters, NULL,
+ tstamp_rx_filter_labels, flags);
+ if (ret < 0)
+ return ret;
+ len += ret;
+ len += nla_total_size(sizeof(u32));
+
+ return nla_total_size(len);
+}
+
static int info_size(const struct common_req_info *req_info)
{
const struct info_data *data =
@@ -110,6 +198,13 @@ static int info_size(const struct common_req_info *req_info)
len += drvinfo_size(&data->drvinfo);
if (info_mask & ETH_INFO_IM_PERMADDR)
len += permaddr_size(dev);
+ if (info_mask & ETH_INFO_IM_TSINFO) {
+ int ret = tsinfo_size(&data->tsinfo, req_info->compact);
+
+ if (ret < 0)
+ return ret;
+ len += ret;
+ }
return len;
}
@@ -158,6 +253,44 @@ static int fill_permaddr(struct sk_buff *skb, const struct net_device *dev)
return ret;
}
+static int fill_tsinfo(struct sk_buff *skb,
+ const struct ethtool_ts_info *tsinfo, bool compact)
+{
+ const unsigned int flags = compact ? ETHNL_BITSET_COMPACT : 0;
+ struct nlattr *nest = ethnl_nest_start(skb, ETHA_INFO_TSINFO);
+ int ret;
+
+ if (!nest)
+ return -EMSGSIZE;
+ ret = ethnl_put_bitset32(skb, ETHA_TSINFO_TIMESTAMPING,
+ __SOF_TIMESTAMPING_COUNT,
+ &tsinfo->so_timestamping, NULL,
+ so_timestamping_labels, flags);
+ if (ret < 0)
+ goto err;
+ ret = -EMSGSIZE;
+ if (tsinfo->phc_index >= 0 &&
+ nla_put_u32(skb, ETHA_TSINFO_PHC_INDEX, tsinfo->phc_index))
+ goto err;
+
+ ret = ethnl_put_bitset32(skb, ETHA_TSINFO_TX_TYPES, __HWTSTAMP_TX_COUNT,
+ &tsinfo->tx_types, NULL, tstamp_tx_type_labels,
+ flags);
+ if (ret < 0)
+ goto err;
+ ret = ethnl_put_bitset32(skb, ETHA_TSINFO_RX_FILTERS,
+ __HWTSTAMP_FILTER_COUNT, &tsinfo->rx_filters,
+ NULL, tstamp_rx_filter_labels, flags);
+ if (ret < 0)
+ goto err;
+
+ nla_nest_end(skb, nest);
+ return 0;
+err:
+ nla_nest_cancel(skb, nest);
+ return ret;
+}
+
static int fill_info(struct sk_buff *skb,
const struct common_req_info *req_info)
{
@@ -176,6 +309,11 @@ static int fill_info(struct sk_buff *skb,
if (ret < 0)
return ret;
}
+ if (info_mask & ETH_INFO_IM_TSINFO) {
+ ret = fill_tsinfo(skb, &data->tsinfo, req_info->compact);
+ if (ret < 0)
+ return ret;
+ }
return 0;
}
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index c883239001a4..0837849156d3 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -2034,28 +2034,12 @@ static int ethtool_get_dump_data(struct net_device *dev,
static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
{
- int err = 0;
+ int err;
struct ethtool_ts_info info;
- const struct ethtool_ops *ops = dev->ethtool_ops;
- struct phy_device *phydev = dev->phydev;
-
- memset(&info, 0, sizeof(info));
- info.cmd = ETHTOOL_GET_TS_INFO;
-
- if (phydev && phydev->drv && phydev->drv->ts_info) {
- err = phydev->drv->ts_info(phydev, &info);
- } else if (ops->get_ts_info) {
- err = ops->get_ts_info(dev, &info);
- } else {
- info.so_timestamping =
- SOF_TIMESTAMPING_RX_SOFTWARE |
- SOF_TIMESTAMPING_SOFTWARE;
- info.phc_index = -1;
- }
+ err = __ethtool_get_ts_info(dev, &info);
if (err)
return err;
-
if (copy_to_user(useraddr, &info, sizeof(info)))
err = -EFAULT;
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 7141ec71a6d3..82a4c1f398d8 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -7,14 +7,23 @@
#include <linux/netdevice.h>
#include <net/genetlink.h>
#include <net/sock.h>
+#include <linux/net_tstamp.h>
#define ETHNL_SET_ERRMSG(info, msg) \
do { if (info) GENL_SET_ERR_MSG(info, msg); } while (0)
+#define __SOF_TIMESTAMPING_COUNT (const_ilog2(SOF_TIMESTAMPING_LAST) + 1)
+#define __HWTSTAMP_TX_COUNT (HWTSTAMP_TX_LAST + 1)
+#define __HWTSTAMP_FILTER_COUNT (HWTSTAMP_FILTER_LAST + 1)
+
extern u32 ethnl_bcast_seq;
extern struct genl_family ethtool_genl_family;
+extern const char *const so_timestamping_labels[];
+extern const char *const tstamp_tx_type_labels[];
+extern const char *const tstamp_rx_filter_labels[];
+
struct net_device *ethnl_dev_get(struct genl_info *info, struct nlattr *nest);
int ethnl_fill_dev(struct sk_buff *msg, struct net_device *dev, u16 attrtype);
diff --git a/net/ethtool/strset.c b/net/ethtool/strset.c
index a7d0ec2865fb..5c74498d9c72 100644
--- a/net/ethtool/strset.c
+++ b/net/ethtool/strset.c
@@ -67,6 +67,24 @@ static const struct strset_info info_template[] = {
.count = ARRAY_SIZE(phy_tunable_strings),
.data = { .legacy = phy_tunable_strings },
},
+ [ETH_SS_TSTAMP_SOF] = {
+ .type = ETH_SS_TYPE_SIMPLE,
+ .per_dev = false,
+ .count = __SOF_TIMESTAMPING_COUNT,
+ .data = { .simple = so_timestamping_labels },
+ },
+ [ETH_SS_TSTAMP_TX_TYPE] = {
+ .type = ETH_SS_TYPE_SIMPLE,
+ .per_dev = false,
+ .count = __HWTSTAMP_TX_COUNT,
+ .data = { .simple = tstamp_tx_type_labels },
+ },
+ [ETH_SS_TSTAMP_RX_FILTER] = {
+ .type = ETH_SS_TYPE_SIMPLE,
+ .per_dev = false,
+ .count = __HWTSTAMP_FILTER_COUNT,
+ .data = { .simple = tstamp_rx_filter_labels },
+ },
};
struct strset_data {
--
2.20.1
^ permalink raw reply related
* [RFC PATCH net-next v3 15/21] ethtool: provide link settings and link modes in GET_SETTINGS request
From: Michal Kubecek @ 2019-02-18 18:22 UTC (permalink / raw)
To: netdev; +Cc: David Miller, Andrew Lunn, Jakub Kicinski, Jiri Pirko,
linux-kernel
In-Reply-To: <cover.1550513384.git.mkubecek@suse.cz>
Implement GET_SETTINGS netlink request to get link settings and link mode
information provided by ETHTOOL_GLINKSETTINGS ioctl command.
The information is divided into two parts: supported, advertised and peer
advertised link modes when ETH_SETTINGS_IM_LINKMODES flag is set in the
request and other settings when ETH_SETTINGS_IM_LINKINFO is set.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
---
Documentation/networking/ethtool-netlink.txt | 49 +++-
include/linux/ethtool_netlink.h | 3 +
include/uapi/linux/ethtool_netlink.h | 37 +++
net/ethtool/Makefile | 2 +-
net/ethtool/common.c | 48 ++++
net/ethtool/common.h | 4 +
net/ethtool/ioctl.c | 48 ----
net/ethtool/netlink.c | 9 +
net/ethtool/settings.c | 265 +++++++++++++++++++
9 files changed, 414 insertions(+), 51 deletions(-)
create mode 100644 net/ethtool/settings.c
diff --git a/Documentation/networking/ethtool-netlink.txt b/Documentation/networking/ethtool-netlink.txt
index c6c7475340e2..0ea7d89c6052 100644
--- a/Documentation/networking/ethtool-netlink.txt
+++ b/Documentation/networking/ethtool-netlink.txt
@@ -130,6 +130,8 @@ List of message types
ETHNL_CMD_SET_STRSET response only
ETHNL_CMD_GET_INFO
ETHNL_CMD_SET_INFO response only
+ ETHNL_CMD_GET_SETTINGS
+ ETHNL_CMD_SET_SETTINGS response only (for now)
All constants use ETHNL_CMD_ prefix, usually followed by "GET", "SET" or "ACT"
to indicate the type.
@@ -264,6 +266,49 @@ if no PHC is associated, the attribute is not present.
GET_INFO requests allow dumps.
+GET_SETTINGS
+------------
+
+GET_SETTINGS request retrieves information provided by ETHTOOL_GLINKSETTINGS,
+ETHTOOL_GWOL, ETHTOOL_GMSGLVL and ETHTOOL_GLINK ioctl requests. The request
+doesn't use any attributes.
+
+Request attributes:
+
+ ETHA_SETTINGS_DEV (nested) device identification
+ ETHA_SETTINGS_INFOMASK (u32) info mask
+ ETHA_SETTINGS_COMPACT (flag) request compact bitsets
+
+Info mask bits meaning:
+
+ ETH_SETTINGS_IM_LINKINFO link_ksettings except link modes
+ ETH_SETTINGS_IM_LINKMODES link modes from link_ksettings
+
+Response contents:
+
+ ETHA_SETTINGS_DEV (nested) device identification
+ ETHA_SETTINGS_LINK_INFO (nested) link settings
+ ETHA_LINKINFO_SPEED (u32) link speed (Mb/s)
+ ETHA_LINKINFO_DUPLEX (u8) duplex mode
+ ETHA_LINKINFO_PORT (u8) physical port
+ ETHA_LINKINFO_PHYADDR (u8) MDIO address of phy
+ ETHA_LINKINFO_AUTONEG (u8) autoneotiation status
+ ETHA_LINKINFO_TP_MDIX (u8) MDI(-X) status
+ ETHA_LINKINFO_TP_MDIX_CTRL (u8) MDI(-X) control
+ ETHA_LINKINFO_TRANSCEIVER (u8) transceiver
+ ETHA_SETTINGS_LINK_MODES (bitset) device link modes
+ ETHA_SETTINGS_PEER_MODES (bitset) link partner link modes
+
+Most of the attributes and their values have the same meaning as matching
+members of the corresponding ioctl structures. For ETHA_SETTINGS_LINK_MODES,
+value represents advertised modes and mask represents supported modes.
+ETHA_SETTINGS_PEER_MODES in the reply is a bit list.
+
+GET_SETTINGS requests allow dumps and messages in the same format as response
+to them are broadcasted as notifications on change of these settings using
+netlink or ioctl ethtool interface.
+
+
Request translation
-------------------
@@ -273,7 +318,7 @@ have their netlink replacement yet.
ioctl command netlink command
---------------------------------------------------------------------
-ETHTOOL_GSET n/a
+ETHTOOL_GSET ETHNL_CMD_GET_SETTINGS
ETHTOOL_SSET n/a
ETHTOOL_GDRVINFO ETHNL_CMD_GET_INFO
ETHTOOL_GREGS n/a
@@ -347,7 +392,7 @@ ETHTOOL_GTUNABLE n/a
ETHTOOL_STUNABLE n/a
ETHTOOL_GPHYSTATS n/a
ETHTOOL_PERQUEUE n/a
-ETHTOOL_GLINKSETTINGS n/a
+ETHTOOL_GLINKSETTINGS ETHNL_CMD_GET_SETTINGS
ETHTOOL_SLINKSETTINGS n/a
ETHTOOL_PHY_GTUNABLE n/a
ETHTOOL_PHY_STUNABLE n/a
diff --git a/include/linux/ethtool_netlink.h b/include/linux/ethtool_netlink.h
index 2a15e64a16f3..e770e6e9acca 100644
--- a/include/linux/ethtool_netlink.h
+++ b/include/linux/ethtool_netlink.h
@@ -7,6 +7,9 @@
#include <linux/ethtool.h>
#include <linux/netdevice.h>
+#define __ETHTOOL_LINK_MODE_MASK_NWORDS \
+ DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
+
enum ethtool_multicast_groups {
ETHNL_MCGRP_MONITOR,
};
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 8ab2b7454e81..4e1fa4a06aac 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -12,6 +12,8 @@ enum {
ETHNL_CMD_SET_STRSET, /* only for reply */
ETHNL_CMD_GET_INFO,
ETHNL_CMD_SET_INFO, /* only for reply */
+ ETHNL_CMD_GET_SETTINGS,
+ ETHNL_CMD_SET_SETTINGS,
__ETHNL_CMD_CNT,
ETHNL_CMD_MAX = (__ETHNL_CMD_CNT - 1)
@@ -189,6 +191,41 @@ enum {
ETHA_TSINFO_MAX = (__ETHA_TSINFO_CNT - 1)
};
+/* GET_SETTINGS / SET_SETTINGS */
+
+enum {
+ ETHA_SETTINGS_UNSPEC,
+ ETHA_SETTINGS_DEV, /* nest - ETHA_DEV_* */
+ ETHA_SETTINGS_INFOMASK, /* u32 */
+ ETHA_SETTINGS_COMPACT, /* flag */
+ ETHA_SETTINGS_LINK_INFO, /* nested */
+ ETHA_SETTINGS_LINK_MODES, /* bitset */
+ ETHA_SETTINGS_PEER_MODES, /* bitset */
+
+ __ETHA_SETTINGS_CNT,
+ ETHA_SETTINGS_MAX = (__ETHA_SETTINGS_CNT - 1)
+};
+
+#define ETH_SETTINGS_IM_LINKINFO 0x01
+#define ETH_SETTINGS_IM_LINKMODES 0x02
+
+#define ETH_SETTINGS_IM_ALL 0x03
+
+enum {
+ ETHA_LINKINFO_UNSPEC,
+ ETHA_LINKINFO_SPEED, /* u32 */
+ ETHA_LINKINFO_DUPLEX, /* u8 */
+ ETHA_LINKINFO_PORT, /* u8 */
+ ETHA_LINKINFO_PHYADDR, /* u8 */
+ ETHA_LINKINFO_AUTONEG, /* u8 */
+ ETHA_LINKINFO_TP_MDIX, /* u8 */
+ ETHA_LINKINFO_TP_MDIX_CTRL, /* u8 */
+ ETHA_LINKINFO_TRANSCEIVER, /* u8 */
+
+ __ETHA_LINKINFO_CNT,
+ ETHA_LINKINFO_MAX = (__ETHA_LINKINFO_CNT - 1)
+};
+
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1
diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile
index 96d41dc45d4f..6a7a182e1568 100644
--- a/net/ethtool/Makefile
+++ b/net/ethtool/Makefile
@@ -4,4 +4,4 @@ obj-y += ioctl.o common.o
obj-$(CONFIG_ETHTOOL_NETLINK) += ethtool_nl.o
-ethtool_nl-y := netlink.o bitset.o strset.o info.o
+ethtool_nl-y := netlink.o bitset.o strset.o info.o settings.o
diff --git a/net/ethtool/common.c b/net/ethtool/common.c
index 4616816861cc..3316e9e403c9 100644
--- a/net/ethtool/common.c
+++ b/net/ethtool/common.c
@@ -159,3 +159,51 @@ int __ethtool_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
return err;
}
+
+/* return false if legacy contained non-0 deprecated fields
+ * maxtxpkt/maxrxpkt. rest of ksettings always updated
+ */
+bool
+convert_legacy_settings_to_link_ksettings(
+ struct ethtool_link_ksettings *link_ksettings,
+ const struct ethtool_cmd *legacy_settings)
+{
+ bool retval = true;
+
+ memset(link_ksettings, 0, sizeof(*link_ksettings));
+
+ /* This is used to tell users that driver is still using these
+ * deprecated legacy fields, and they should not use
+ * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
+ */
+ if (legacy_settings->maxtxpkt ||
+ legacy_settings->maxrxpkt)
+ retval = false;
+
+ ethtool_convert_legacy_u32_to_link_mode(
+ link_ksettings->link_modes.supported,
+ legacy_settings->supported);
+ ethtool_convert_legacy_u32_to_link_mode(
+ link_ksettings->link_modes.advertising,
+ legacy_settings->advertising);
+ ethtool_convert_legacy_u32_to_link_mode(
+ link_ksettings->link_modes.lp_advertising,
+ legacy_settings->lp_advertising);
+ link_ksettings->base.speed
+ = ethtool_cmd_speed(legacy_settings);
+ link_ksettings->base.duplex
+ = legacy_settings->duplex;
+ link_ksettings->base.port
+ = legacy_settings->port;
+ link_ksettings->base.phy_address
+ = legacy_settings->phy_address;
+ link_ksettings->base.autoneg
+ = legacy_settings->autoneg;
+ link_ksettings->base.mdio_support
+ = legacy_settings->mdio_support;
+ link_ksettings->base.eth_tp_mdix
+ = legacy_settings->eth_tp_mdix;
+ link_ksettings->base.eth_tp_mdix_ctrl
+ = legacy_settings->eth_tp_mdix_ctrl;
+ return retval;
+}
diff --git a/net/ethtool/common.h b/net/ethtool/common.h
index 02cbee79da35..7a3e0b10e69a 100644
--- a/net/ethtool/common.h
+++ b/net/ethtool/common.h
@@ -18,4 +18,8 @@ phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN];
int __ethtool_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info);
int __ethtool_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info);
+bool convert_legacy_settings_to_link_ksettings(
+ struct ethtool_link_ksettings *link_ksettings,
+ const struct ethtool_cmd *legacy_settings);
+
#endif /* _ETHTOOL_COMMON_H */
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index 0837849156d3..5e878cf6f418 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -356,54 +356,6 @@ bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
}
EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
-/* return false if legacy contained non-0 deprecated fields
- * maxtxpkt/maxrxpkt. rest of ksettings always updated
- */
-static bool
-convert_legacy_settings_to_link_ksettings(
- struct ethtool_link_ksettings *link_ksettings,
- const struct ethtool_cmd *legacy_settings)
-{
- bool retval = true;
-
- memset(link_ksettings, 0, sizeof(*link_ksettings));
-
- /* This is used to tell users that driver is still using these
- * deprecated legacy fields, and they should not use
- * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
- */
- if (legacy_settings->maxtxpkt ||
- legacy_settings->maxrxpkt)
- retval = false;
-
- ethtool_convert_legacy_u32_to_link_mode(
- link_ksettings->link_modes.supported,
- legacy_settings->supported);
- ethtool_convert_legacy_u32_to_link_mode(
- link_ksettings->link_modes.advertising,
- legacy_settings->advertising);
- ethtool_convert_legacy_u32_to_link_mode(
- link_ksettings->link_modes.lp_advertising,
- legacy_settings->lp_advertising);
- link_ksettings->base.speed
- = ethtool_cmd_speed(legacy_settings);
- link_ksettings->base.duplex
- = legacy_settings->duplex;
- link_ksettings->base.port
- = legacy_settings->port;
- link_ksettings->base.phy_address
- = legacy_settings->phy_address;
- link_ksettings->base.autoneg
- = legacy_settings->autoneg;
- link_ksettings->base.mdio_support
- = legacy_settings->mdio_support;
- link_ksettings->base.eth_tp_mdix
- = legacy_settings->eth_tp_mdix;
- link_ksettings->base.eth_tp_mdix_ctrl
- = legacy_settings->eth_tp_mdix_ctrl;
- return retval;
-}
-
/* return false if ksettings link modes had higher bits
* set. legacy_settings always updated (best effort)
*/
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 1ff6696ad716..5166b0c28288 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -143,10 +143,12 @@ int ethnl_fill_dev(struct sk_buff *msg, struct net_device *dev, u16 attrtype)
extern const struct get_request_ops strset_request_ops;
extern const struct get_request_ops info_request_ops;
+extern const struct get_request_ops settings_request_ops;
const struct get_request_ops *get_requests[__ETHNL_CMD_CNT] = {
[ETHNL_CMD_GET_STRSET] = &strset_request_ops,
[ETHNL_CMD_GET_INFO] = &info_request_ops,
+ [ETHNL_CMD_GET_SETTINGS] = &settings_request_ops,
};
static struct common_req_info *alloc_get_data(const struct get_request_ops *ops)
@@ -572,6 +574,13 @@ static const struct genl_ops ethtool_genl_ops[] = {
.dumpit = ethnl_get_dumpit,
.done = ethnl_get_done,
},
+ {
+ .cmd = ETHNL_CMD_GET_SETTINGS,
+ .doit = ethnl_get_doit,
+ .start = ethnl_get_start,
+ .dumpit = ethnl_get_dumpit,
+ .done = ethnl_get_done,
+ },
};
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
diff --git a/net/ethtool/settings.c b/net/ethtool/settings.c
new file mode 100644
index 000000000000..4f2858fe1a7d
--- /dev/null
+++ b/net/ethtool/settings.c
@@ -0,0 +1,265 @@
+// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
+
+#include "netlink.h"
+#include "common.h"
+#include "bitset.h"
+
+struct settings_data {
+ struct common_req_info reqinfo_base;
+
+ /* everything below here will be reset for each device in dumps */
+ struct common_reply_data repdata_base;
+ struct ethtool_link_ksettings ksettings;
+ struct ethtool_link_settings *lsettings;
+ bool lpm_empty;
+};
+
+static const struct nla_policy get_settings_policy[ETHA_SETTINGS_MAX + 1] = {
+ [ETHA_SETTINGS_UNSPEC] = { .type = NLA_REJECT },
+ [ETHA_SETTINGS_DEV] = { .type = NLA_NESTED },
+ [ETHA_SETTINGS_INFOMASK] = { .type = NLA_U32 },
+ [ETHA_SETTINGS_COMPACT] = { .type = NLA_FLAG },
+ [ETHA_SETTINGS_LINK_INFO] = { .type = NLA_REJECT },
+ [ETHA_SETTINGS_LINK_MODES] = { .type = NLA_REJECT },
+ [ETHA_SETTINGS_PEER_MODES] = { .type = NLA_REJECT },
+};
+
+static int parse_settings(struct common_req_info *req_info,
+ struct sk_buff *skb, struct genl_info *info,
+ const struct nlmsghdr *nlhdr)
+{
+ struct nlattr *tb[ETHA_SETTINGS_MAX + 1];
+ int ret;
+
+ ret = genlmsg_parse(nlhdr, ðtool_genl_family, tb,
+ ETHA_SETTINGS_MAX, get_settings_policy,
+ info ? info->extack : NULL);
+ if (ret < 0)
+ return ret;
+
+ if (tb[ETHA_SETTINGS_DEV]) {
+ req_info->dev = ethnl_dev_get(info, tb[ETHA_SETTINGS_DEV]);
+ if (IS_ERR(req_info->dev)) {
+ ret = PTR_ERR(req_info->dev);
+ req_info->dev = NULL;
+ return ret;
+ }
+ }
+ if (tb[ETHA_SETTINGS_INFOMASK])
+ req_info->req_mask = nla_get_u32(tb[ETHA_SETTINGS_INFOMASK]);
+ if (tb[ETHA_SETTINGS_COMPACT])
+ req_info->compact = true;
+ if (req_info->req_mask == 0)
+ req_info->req_mask = ETH_SETTINGS_IM_ALL;
+
+ return 0;
+}
+
+static int ethnl_get_link_ksettings(struct genl_info *info,
+ struct net_device *dev,
+ struct ethtool_link_ksettings *ksettings)
+{
+ int ret;
+
+ ret = __ethtool_get_link_ksettings(dev, ksettings);
+
+ if (ret < 0)
+ ETHNL_SET_ERRMSG(info, "failed to retrieve link settings");
+ return ret;
+}
+
+static int prepare_settings(struct common_req_info *req_info,
+ struct genl_info *info)
+{
+ struct settings_data *data =
+ container_of(req_info, struct settings_data, reqinfo_base);
+ struct net_device *dev = data->repdata_base.dev;
+ u32 req_mask = req_info->req_mask;
+ int ret;
+
+ data->lsettings = &data->ksettings.base;
+ data->lpm_empty = true;
+
+ ret = ethnl_before_ops(dev);
+ if (ret < 0)
+ return ret;
+ if (req_mask & (ETH_SETTINGS_IM_LINKINFO | ETH_SETTINGS_IM_LINKMODES)) {
+ ret = ethnl_get_link_ksettings(info, dev, &data->ksettings);
+ if (ret < 0)
+ req_mask &= ~(ETH_SETTINGS_IM_LINKINFO |
+ ETH_SETTINGS_IM_LINKMODES);
+ }
+ if (req_mask & ETH_SETTINGS_IM_LINKMODES) {
+ data->lpm_empty =
+ bitmap_empty(data->ksettings.link_modes.lp_advertising,
+ __ETHTOOL_LINK_MODE_MASK_NBITS);
+ ethnl_bitmap_to_u32(data->ksettings.link_modes.supported,
+ __ETHTOOL_LINK_MODE_MASK_NWORDS);
+ ethnl_bitmap_to_u32(data->ksettings.link_modes.advertising,
+ __ETHTOOL_LINK_MODE_MASK_NWORDS);
+ ethnl_bitmap_to_u32(data->ksettings.link_modes.lp_advertising,
+ __ETHTOOL_LINK_MODE_MASK_NWORDS);
+ }
+ ethnl_after_ops(dev);
+
+ data->repdata_base.info_mask = req_mask;
+ if (req_info->req_mask & ~req_mask)
+ warn_partial_info(info);
+ return 0;
+}
+
+static int link_info_size(void)
+{
+ int len = 0;
+
+ /* speed */
+ len += nla_total_size(sizeof(u32));
+ /* duplex, autoneg, port, phyaddr, mdix, mdixctrl, transcvr */
+ len += 7 * nla_total_size(sizeof(u8));
+ /* mdio_support */
+ len += nla_total_size(sizeof(struct nla_bitfield32));
+
+ /* nest */
+ return nla_total_size(len);
+}
+
+static int link_modes_size(const struct ethtool_link_ksettings *ksettings,
+ bool compact)
+{
+ unsigned int flags = compact ? ETHNL_BITSET_COMPACT : 0;
+ u32 *supported = (u32 *)ksettings->link_modes.supported;
+ u32 *advertising = (u32 *)ksettings->link_modes.advertising;
+ u32 *lp_advertising = (u32 *)ksettings->link_modes.lp_advertising;
+ int len = 0, ret;
+
+ ret = ethnl_bitset32_size(__ETHTOOL_LINK_MODE_MASK_NBITS, advertising,
+ supported, link_mode_names, flags);
+ if (ret < 0)
+ return ret;
+ len += ret;
+ ret = ethnl_bitset32_size(__ETHTOOL_LINK_MODE_MASK_NBITS,
+ lp_advertising, NULL, link_mode_names,
+ flags & ETHNL_BITSET_LIST);
+ if (ret < 0)
+ return ret;
+ len += ret;
+
+ return len;
+}
+
+/* To keep things simple, reserve space for some attributes which may not
+ * be added to the message (e.g. ETHA_SETTINGS_SOPASS); therefore the length
+ * returned may be bigger than the actual length of the message sent
+ */
+static int settings_size(const struct common_req_info *req_info)
+{
+ struct settings_data *data =
+ container_of(req_info, struct settings_data, reqinfo_base);
+ u32 info_mask = data->repdata_base.info_mask;
+ bool compact = req_info->compact;
+ int len = 0, ret;
+
+ len += dev_ident_size();
+ if (info_mask & ETH_SETTINGS_IM_LINKINFO)
+ len += link_info_size();
+ if (info_mask & ETH_SETTINGS_IM_LINKMODES) {
+ ret = link_modes_size(&data->ksettings, compact);
+ if (ret < 0)
+ return ret;
+ len += ret;
+ }
+
+ return len;
+}
+
+static int fill_link_info(struct sk_buff *skb,
+ const struct ethtool_link_settings *lsettings)
+{
+ struct nlattr *nest = ethnl_nest_start(skb, ETHA_SETTINGS_LINK_INFO);
+
+ if (!nest)
+ return -EMSGSIZE;
+ if (nla_put_u32(skb, ETHA_LINKINFO_SPEED, lsettings->speed) ||
+ nla_put_u8(skb, ETHA_LINKINFO_DUPLEX, lsettings->duplex) ||
+ nla_put_u8(skb, ETHA_LINKINFO_PORT, lsettings->port) ||
+ nla_put_u8(skb, ETHA_LINKINFO_PHYADDR,
+ lsettings->phy_address) ||
+ nla_put_u8(skb, ETHA_LINKINFO_AUTONEG,
+ lsettings->autoneg) ||
+ nla_put_u8(skb, ETHA_LINKINFO_TP_MDIX,
+ lsettings->eth_tp_mdix) ||
+ nla_put_u8(skb, ETHA_LINKINFO_TP_MDIX_CTRL,
+ lsettings->eth_tp_mdix_ctrl) ||
+ nla_put_u8(skb, ETHA_LINKINFO_TRANSCEIVER,
+ lsettings->transceiver)) {
+ nla_nest_cancel(skb, nest);
+ return -EMSGSIZE;
+ }
+
+ nla_nest_end(skb, nest);
+ return 0;
+}
+
+static int fill_link_modes(struct sk_buff *skb,
+ const struct ethtool_link_ksettings *ksettings,
+ bool lpm_empty, bool compact)
+{
+ const u32 *supported = (const u32 *)ksettings->link_modes.supported;
+ const u32 *advertising = (const u32 *)ksettings->link_modes.advertising;
+ const u32 *lp_adv = (const u32 *)ksettings->link_modes.lp_advertising;
+ const unsigned int flags = compact ? ETHNL_BITSET_COMPACT : 0;
+ int ret;
+
+ ret = ethnl_put_bitset32(skb, ETHA_SETTINGS_LINK_MODES,
+ __ETHTOOL_LINK_MODE_MASK_NBITS, advertising,
+ supported, link_mode_names, flags);
+ if (ret < 0)
+ return ret;
+ if (!lpm_empty) {
+ ret = ethnl_put_bitset32(skb, ETHA_SETTINGS_PEER_MODES,
+ __ETHTOOL_LINK_MODE_MASK_NBITS,
+ lp_adv, NULL, link_mode_names,
+ flags | ETHNL_BITSET_LIST);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int fill_settings(struct sk_buff *skb,
+ const struct common_req_info *req_info)
+{
+ const struct settings_data *data =
+ container_of(req_info, struct settings_data, reqinfo_base);
+ u32 info_mask = data->repdata_base.info_mask;
+ bool compact = req_info->compact;
+ int ret;
+
+ if (info_mask & ETH_SETTINGS_IM_LINKINFO) {
+ ret = fill_link_info(skb, data->lsettings);
+ if (ret < 0)
+ return ret;
+ }
+ if (info_mask & ETH_SETTINGS_IM_LINKMODES) {
+ ret = fill_link_modes(skb, &data->ksettings, data->lpm_empty,
+ compact);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+const struct get_request_ops settings_request_ops = {
+ .request_cmd = ETHNL_CMD_GET_SETTINGS,
+ .reply_cmd = ETHNL_CMD_SET_SETTINGS,
+ .dev_attrtype = ETHA_SETTINGS_DEV,
+ .data_size = sizeof(struct settings_data),
+ .repdata_offset = offsetof(struct settings_data, repdata_base),
+
+ .parse_request = parse_settings,
+ .prepare_data = prepare_settings,
+ .reply_size = settings_size,
+ .fill_reply = fill_settings,
+};
--
2.20.1
^ permalink raw reply related
* [RFC PATCH net-next v3 18/21] ethtool: provide link state in GET_SETTINGS request
From: Michal Kubecek @ 2019-02-18 18:22 UTC (permalink / raw)
To: netdev; +Cc: David Miller, Andrew Lunn, Jakub Kicinski, Jiri Pirko,
linux-kernel
In-Reply-To: <cover.1550513384.git.mkubecek@suse.cz>
Add information about device link state (as provided by ETHTOOL_GLINK ioctl
command) into the GET_SETTINGS reply when ETH_SETTINGS_IM_LINK flag is set
in the request.
Note: we cannot use NLA_FLAG for link state as we need three states: off,
on and unknown.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
---
Documentation/networking/ethtool-netlink.txt | 4 +++-
include/uapi/linux/ethtool_netlink.h | 4 +++-
net/ethtool/common.c | 8 ++++++++
net/ethtool/common.h | 1 +
net/ethtool/ioctl.c | 8 ++++----
net/ethtool/settings.c | 11 +++++++++++
6 files changed, 30 insertions(+), 6 deletions(-)
diff --git a/Documentation/networking/ethtool-netlink.txt b/Documentation/networking/ethtool-netlink.txt
index 057eb3213cfe..538dad93009f 100644
--- a/Documentation/networking/ethtool-netlink.txt
+++ b/Documentation/networking/ethtool-netlink.txt
@@ -285,6 +285,7 @@ Info mask bits meaning:
ETH_SETTINGS_IM_LINKMODES link modes from link_ksettings
ETH_SETTINGS_IM_WOLINFO struct ethtool_wolinfo
ETH_SETTINGS_IM_MSGLEVEL msglevel
+ ETH_SETTINGS_IM_LINK link state
Response contents:
@@ -304,6 +305,7 @@ Response contents:
ETHA_WOL_MODES (bitfield32) wake on LAN modes
ETHA_WOL_SOPASS (binary) SecureOn(tm) password
ETHA_SETTINGS_MSGLEVEL (bitfield32) debug level
+ ETHA_SETTINGS_LINK (u8) link state
Most of the attributes and their values have the same meaning as matching
members of the corresponding ioctl structures. For ETHA_SETTINGS_LINK_MODES,
@@ -343,7 +345,7 @@ ETHTOOL_SWOL n/a
ETHTOOL_GMSGLVL ETHNL_CMD_GET_SETTINGS
ETHTOOL_SMSGLVL n/a
ETHTOOL_NWAY_RST n/a
-ETHTOOL_GLINK n/a
+ETHTOOL_GLINK ETHNL_CMD_GET_SETTINGS
ETHTOOL_GEEPROM n/a
ETHTOOL_SEEPROM n/a
ETHTOOL_GCOALESCE n/a
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 360e20a73f19..06e78d94cacc 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -203,6 +203,7 @@ enum {
ETHA_SETTINGS_PEER_MODES, /* bitset */
ETHA_SETTINGS_WOL, /* nested */
ETHA_SETTINGS_MSGLEVEL, /* bitfield32 */
+ ETHA_SETTINGS_LINK, /* u8 */
__ETHA_SETTINGS_CNT,
ETHA_SETTINGS_MAX = (__ETHA_SETTINGS_CNT - 1)
@@ -212,8 +213,9 @@ enum {
#define ETH_SETTINGS_IM_LINKMODES 0x02
#define ETH_SETTINGS_IM_WOLINFO 0x04
#define ETH_SETTINGS_IM_MSGLEVEL 0x08
+#define ETH_SETTINGS_IM_LINK 0x10
-#define ETH_SETTINGS_IM_ALL 0x0f
+#define ETH_SETTINGS_IM_ALL 0x1f
enum {
ETHA_LINKINFO_UNSPEC,
diff --git a/net/ethtool/common.c b/net/ethtool/common.c
index 9fba57f554dd..a188f07bcb4c 100644
--- a/net/ethtool/common.c
+++ b/net/ethtool/common.c
@@ -217,3 +217,11 @@ int __ethtool_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
return 0;
}
+
+int __ethtool_get_link(struct net_device *dev)
+{
+ if (!dev->ethtool_ops->get_link)
+ return -EOPNOTSUPP;
+
+ return netif_running(dev) && dev->ethtool_ops->get_link(dev);
+}
diff --git a/net/ethtool/common.h b/net/ethtool/common.h
index ed3f1ca54660..e5b5c5c2a4b9 100644
--- a/net/ethtool/common.h
+++ b/net/ethtool/common.h
@@ -18,6 +18,7 @@ phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN];
int __ethtool_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info);
int __ethtool_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info);
int __ethtool_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol);
+int __ethtool_get_link(struct net_device *dev);
bool convert_legacy_settings_to_link_ksettings(
struct ethtool_link_ksettings *link_ksettings,
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index 945eaf551a4c..63662a3fa2ae 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -1306,12 +1306,12 @@ static int ethtool_nway_reset(struct net_device *dev)
static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
{
struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
+ int link = __ethtool_get_link(dev);
- if (!dev->ethtool_ops->get_link)
- return -EOPNOTSUPP;
-
- edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
+ if (link < 0)
+ return link;
+ edata.data = link;
if (copy_to_user(useraddr, &edata, sizeof(edata)))
return -EFAULT;
return 0;
diff --git a/net/ethtool/settings.c b/net/ethtool/settings.c
index 58cd2d19a75d..099300901c12 100644
--- a/net/ethtool/settings.c
+++ b/net/ethtool/settings.c
@@ -14,6 +14,7 @@ struct settings_data {
struct ethtool_link_settings *lsettings;
struct ethtool_wolinfo wolinfo;
u32 msglevel;
+ int link;
bool lpm_empty;
};
@@ -27,6 +28,7 @@ static const struct nla_policy get_settings_policy[ETHA_SETTINGS_MAX + 1] = {
[ETHA_SETTINGS_PEER_MODES] = { .type = NLA_REJECT },
[ETHA_SETTINGS_WOL] = { .type = NLA_REJECT },
[ETHA_SETTINGS_MSGLEVEL] = { .type = NLA_REJECT },
+ [ETHA_SETTINGS_LINK] = { .type = NLA_REJECT },
};
static int parse_settings(struct common_req_info *req_info,
@@ -99,6 +101,7 @@ static int prepare_settings(struct common_req_info *req_info,
data->lsettings = &data->ksettings.base;
data->lpm_empty = true;
+ data->link = -EOPNOTSUPP;
ret = ethnl_before_ops(dev);
if (ret < 0)
@@ -131,6 +134,8 @@ static int prepare_settings(struct common_req_info *req_info,
else
req_mask &= ~ETH_SETTINGS_IM_MSGLEVEL;
}
+ if (req_mask & ETH_SETTINGS_IM_LINK)
+ data->link = __ethtool_get_link(dev);
ethnl_after_ops(dev);
data->repdata_base.info_mask = req_mask;
@@ -209,6 +214,8 @@ static int settings_size(const struct common_req_info *req_info)
len += wol_size();
if (info_mask & ETH_SETTINGS_IM_MSGLEVEL)
len += nla_total_size(sizeof(struct nla_bitfield32));
+ if (info_mask & ETH_SETTINGS_IM_LINK)
+ len += nla_total_size(sizeof(u32));
return len;
}
@@ -324,6 +331,10 @@ static int fill_settings(struct sk_buff *skb,
data->msglevel, NETIF_MSG_ALL))
return -EMSGSIZE;
}
+ if (info_mask & ETH_SETTINGS_IM_LINK && data->link >= 0) {
+ if (nla_put_u8(skb, ETHA_SETTINGS_LINK, data->link))
+ return -EMSGSIZE;
+ }
return 0;
}
--
2.20.1
^ permalink raw reply related
* [RFC PATCH net-next v3 21/21] ethtool: send netlink notifications about setting changes
From: Michal Kubecek @ 2019-02-18 18:23 UTC (permalink / raw)
To: netdev; +Cc: David Miller, Andrew Lunn, Jakub Kicinski, Jiri Pirko,
linux-kernel
In-Reply-To: <cover.1550513384.git.mkubecek@suse.cz>
SET_SETTINGS notification message has the same format as response to
GET_SETTINGS request and is broadcasted on change of relevant fields. Info
mask can be used to limit the information passed to userspace.
Send the notification on changes performed via the legacy ioctl interface;
feature notifications are also sent whenever netdev_update_features() or
netdev_change_features() is called, even if the change was not performed
using the ethtool interface.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
---
net/ethtool/ioctl.c | 24 ++++++++++++++++++++++--
net/ethtool/netlink.c | 12 ++++++++++++
2 files changed, 34 insertions(+), 2 deletions(-)
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index 6c3b492a88fe..17ccca14f5c3 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -30,6 +30,7 @@
#include <net/devlink.h>
#include <net/xdp_sock.h>
#include <net/flow_offload.h>
+#include <linux/ethtool_netlink.h>
#include "common.h"
@@ -567,7 +568,12 @@ static int ethtool_set_link_ksettings(struct net_device *dev,
!= link_ksettings.base.link_mode_masks_nwords)
return -EINVAL;
- return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
+ err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
+ if (err >= 0)
+ ethtool_notify(dev, NULL, ETHNL_CMD_SET_SETTINGS,
+ ETH_SETTINGS_IM_LINKINFO |
+ ETH_SETTINGS_IM_LINKMODES, NULL);
+ return err;
}
/* Query device for its ethtool_cmd settings.
@@ -616,6 +622,7 @@ static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
{
struct ethtool_link_ksettings link_ksettings;
struct ethtool_cmd cmd;
+ int ret;
ASSERT_RTNL();
@@ -628,7 +635,12 @@ static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
return -EINVAL;
link_ksettings.base.link_mode_masks_nwords =
__ETHTOOL_LINK_MODE_MASK_NU32;
- return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
+ ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
+ if (ret >= 0)
+ ethtool_notify(dev, NULL, ETHNL_CMD_SET_SETTINGS,
+ ETH_SETTINGS_IM_LINKINFO |
+ ETH_SETTINGS_IM_LINKMODES, NULL);
+ return ret;
}
static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
@@ -1255,6 +1267,8 @@ static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
return ret;
dev->wol_enabled = !!wol.wolopts;
+ ethtool_notify(dev, NULL, ETHNL_CMD_SET_SETTINGS,
+ ETH_SETTINGS_IM_WOLINFO, NULL);
return 0;
}
@@ -2453,6 +2467,9 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
case ETHTOOL_SMSGLVL:
rc = ethtool_set_value_void(dev, useraddr,
dev->ethtool_ops->set_msglevel);
+ if (rc >= 0)
+ ethtool_notify(dev, NULL, ETHNL_CMD_SET_SETTINGS,
+ ETH_SETTINGS_IM_MSGLEVEL, NULL);
break;
case ETHTOOL_GEEE:
rc = ethtool_get_eee(dev, useraddr);
@@ -2519,6 +2536,9 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
case ETHTOOL_SPFLAGS:
rc = ethtool_set_value(dev, useraddr,
dev->ethtool_ops->set_priv_flags);
+ if (rc == 0)
+ ethtool_notify(dev, NULL, ETHNL_CMD_SET_SETTINGS,
+ ETH_SETTINGS_IM_PRIVFLAGS, NULL);
break;
case ETHTOOL_GRXFH:
case ETHTOOL_GRXRINGS:
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 5166b0c28288..6f94aec6fa69 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -480,6 +480,7 @@ typedef void (*ethnl_notify_handler_t)(struct net_device *dev,
const void *data);
ethnl_notify_handler_t ethnl_notify_handlers[] = {
+ [ETHNL_CMD_SET_SETTINGS] = ethnl_std_notify,
};
void ethtool_notify(struct net_device *dev, struct netlink_ext_ack *extack,
@@ -534,6 +535,14 @@ static void ethnl_notify_devlist(struct netdev_notifier_info *info,
nlmsg_free(skb);
}
+static void ethnl_notify_features(struct netdev_notifier_info *info)
+{
+ struct net_device *dev = netdev_notifier_info_to_dev(info);
+
+ ethtool_notify(dev, NULL, ETHNL_CMD_SET_SETTINGS,
+ ETH_SETTINGS_IM_FEATURES, NULL);
+}
+
static int ethnl_netdev_event(struct notifier_block *this, unsigned long event,
void *ptr)
{
@@ -548,6 +557,9 @@ static int ethnl_netdev_event(struct notifier_block *this, unsigned long event,
ethnl_notify_devlist(ptr, ETHA_EVENT_RENAMEDEV,
ETHA_RENAMEDEV_DEV);
break;
+ case NETDEV_FEAT_CHANGE:
+ ethnl_notify_features(ptr);
+ break;
}
return NOTIFY_DONE;
--
2.20.1
^ permalink raw reply related
* Re: [PATCH net-next 0/2] tracepoints in neighbor subsystem
From: Roopa Prabhu @ 2019-02-18 18:23 UTC (permalink / raw)
To: David Miller; +Cc: netdev, David Ahern
In-Reply-To: <20190217.103437.1509010953072073413.davem@davemloft.net>
On Sun, Feb 17, 2019 at 10:34 AM David Miller <davem@davemloft.net> wrote:
>
> From: Roopa Prabhu <roopa@cumulusnetworks.com>
> Date: Thu, 14 Feb 2019 09:15:09 -0800
>
> > From: Roopa Prabhu <roopa@cumulusnetworks.com>
> >
> > Roopa Prabhu (2):
> > trace: events: add a few neigh tracepoints
> > neigh: hook tracepoints in neigh update code
>
> Series applied, thanks.
>
> Maybe put some actual text in this intro posting next time, explaining
> what the series is doing, how it is doing it, and why?
>
Oops, My bad. I did have text here in my initial version and possibly
accidentally dropped it when re-generating the cover-letter multiple
times. And absolutely, will keep an eye out to make sure it is
complete next time on. Thanks.
Here are some examples of perf report outputs for neigh creates and
deletes (if anyone wants to review further).
As i type this i realized I missed the converting of new_state to
string. Will send a patch to fix it.
# create a neigh
$ip neigh add 45.0.1.100 dev vlan1001 lladdr 00:02:00:00:00:aa nud reachable
ip 3964 [000] 52484.852372: neigh:neigh_update: family 2
dev vlan1001 lladdr 000000000000 flags 00 nud_state 0x0 type 01 dead 0
refcnt 2 primary_key4 45.0.1.100 primary_key6 ::ffff:45.0.1.100
confirmed 4344992162 updated 4347152162 used 4347152162 new_lladdr
0002000000aa new_state 02 update_flags 80000005 pid 3964
ip 3964 [000] 52484.852446: neigh:neigh_update_done: family 2
dev vlan1001 lladdr 0002000000aa flags 00 nud_state reachable type 01
dead 0 refcnt 3 primary_key4 45.0.1.100 primary_key6 ::ffff:45.0.1.100
confirmed 4347152162 updated 4347152162 used 4347152162 err 0
# change of lladdr on existing neigh
$ip neigh replace 45.0.1.100 dev vlan1001 lladdr 00:02:00:00:00:bb nud reachable
ip 3965 [000] 52484.855838: neigh:neigh_update: family 2
dev vlan1001 lladdr 0002000000aa flags 00 nud_state reachable type 01
dead 0 refcnt 3 primary_key4 45.0.1.100 primary_key6 ::ffff:45.0.1.100
confirmed 4347152162 updated 4347152162 used 4347152162 new_lladdr
0002000000bb new_state 02 update_flags 80000005 pid 3965
ip 3965 [000] 52484.855883: neigh:neigh_update_done: family 2
dev vlan1001 lladdr 0002000000bb flags 00 nud_state reachable type 01
dead 0 refcnt 3 primary_key4 45.0.1.100 primary_key6 ::ffff:45.0.1.100
confirmed 4347152165 updated 4347152165 used 4347152162 err 0
# neigh delete, update comes in with NUD_FAILED
$ip neigh del 45.0.1.100 dev vlan1001
ip 3966 [000] 52484.859354: neigh:neigh_update: family 2
dev vlan1001 lladdr 0002000000bb flags 00 nud_state reachable type 01
dead 0 refcnt 3 primary_key4 45.0.1.100 primary_key6 ::ffff:45.0.1.100
confirmed 4347152165 updated 4347152165 used 4347152162 new_lladdr
00000000766c new_state 20 update_flags 80000001 pid 3966
ip 3966 [000] 52484.859397: neigh:neigh_update_done: family 2
dev vlan1001 lladdr 0002000000bb flags 00 nud_state failed type 01
dead 0 refcnt 2 primary_key4 45.0.1.100 primary_key6 ::ffff:45.0.1.100
confirmed 4347152165 updated 4347152165 used 4347152162 err 0
ip 3966 [000] 52484.859401: neigh:neigh_cleanup_and_release: family 2
dev vlan1001 lladdr 0002000000bb flags 00 nud_state failed type 01
dead 1 refcnt 1 primary_key4 45.0.1.100 primary_key6 ::ffff:45.0.1.100
confirmed 4347152165 updated 4347152165 used 4347152162 err 0
# readd neigh entry and allow it to age, this time
$ip neigh add 45.0.1.100 dev vlan1001 lladdr 00:02:00:00:00:aa nud reachable
ip 4165 [000] 52519.192502: neigh:neigh_update: family 2
dev vlan1001 lladdr 000000000000 flags 00 nud_state 0x0 type 01 dead 0
refcnt 2 primary_key4 45.0.1.100 primary_key6 ::ffff:45.0.1.100
confirmed 4345026502 updated 4347186502 used 4347186502 new_lladdr
0002000000aa new_state 02 update_flags 80000005 pid 4165
ip 4165 [000] 52519.192562: neigh:neigh_update_done: family 2
dev vlan1001 lladdr 0002000000aa flags 00 nud_state reachable type 01
dead 0 refcnt 3 primary_key4 45.0.1.100 primary_key6 ::ffff:45.0.1.100
confirmed 4347186502 updated 4347186502 used 4347186502 err 0
swapper 0 [000] 53220.306184: neigh:neigh_timer_handler:
family 2 dev vlan1001 lladdr 0002000000aa flags 00 nud_state reachable
type 01 dead 0 refcnt 3 primary_key4 45.0.1.100 primary_key6
::ffff:45.0.1.100 confirmed 4347186502 updated 4347186502 used
4347186502 err 0
swapper 0 [000] 53973.970238: neigh:neigh_timer_handler:
family 2 dev vlan1001 lladdr 0002000000aa flags 00 nud_state stale
type 01 dead 0 refcnt 2 primary_key4 45.0.1.100 primary_key6
::ffff:45.0.1.100 confirmed 4347186502 updated 4348641280 used
4347186502 err 0
ip 10268 [000] 65338.084401: neigh:neigh_cleanup_and_release: family 2
dev vlan1001 lladdr 0002000000aa flags 00 nud_state stale type 01 dead
1 refcnt 1 primary_key4 45.0.1.100 primary_key6 ::ffff:45.0.1.100
confirmed 4347186502 updated 4348641280 used 4347186502 err 0
^ permalink raw reply
page: next (older) | prev (newer) | latest
- recent:[subjects (threaded)|topics (new)|topics (active)]
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox