Re: [PATCH net-next] net: procfs: add seq_puts() statement for dev_mcast
From: Vladimir Oltean <olteanv@gmail.com>
Date: 2021-10-09 16:42:57
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On Sat, Oct 09, 2021 at 07:35:11PM +0300, Vladimir Oltean wrote:
On Mon, Aug 16, 2021 at 04:57:57PM +0800, Yajun Deng wrote:quoted
Add seq_puts() statement for dev_mcast, make it more readable. As also, keep vertical alignment for {dev, ptype, dev_mcast} that under /proc/net. Signed-off-by: Yajun Deng <redacted> ---FYI, this program got broken by this commit (reverting it restores functionality): root@debian:~# ifstat ifstat: /proc/net/dev: unsupported format. Confusingly enough, the "ifstat" provided by Debian is not from iproute2: https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/tree/misc/ifstat.c but rather a similarly named program: https://packages.debian.org/source/bullseye/ifstat https://github.com/matttbe/ifstat I haven't studied how this program parses /proc/net/dev, but here's how the kernel's output changed:
Ah, it scrapes the text for "Inter-|": https://github.com/matttbe/ifstat/blob/main/drivers.c#L825
Doesn't work:
root@debian:~# cat /proc/net/dev
Interface| Receive | Transmit
| bytes packets errs drop fifo frame compressed multicast| bytes packets errs drop fifo colls carrier compressed
lo: 97400 1204 0 0 0 0 0 0 97400 1204 0 0 0 0 0 0
bond0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
sit0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
eno2: 5002206 6651 0 0 0 0 0 0 105518642 1465023 0 0 0 0 0 0
swp0: 134531 2448 0 0 0 0 0 0 99599598 1464381 0 0 0 0 0 0
swp1: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
swp2: 4867675 4203 0 0 0 0 0 0 58134 631 0 0 0 0 0 0
sw0p0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
sw0p1: 124739 2448 0 1422 0 0 0 0 93741184 1464369 0 0 0 0 0 0
sw0p2: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
sw2p0: 4850863 4203 0 0 0 0 0 0 54722 619 0 0 0 0 0 0
sw2p1: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
sw2p2: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
sw2p3: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
br0: 10508 212 0 212 0 0 0 212 61369558 958857 0 0 0 0 0 0
Works:
root@debian:~# cat /proc/net/dev
Inter-| Receive | Transmit
face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed
lo: 13160 164 0 0 0 0 0 0 13160 164 0 0 0 0 0 0
bond0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
sit0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
eno2: 30824 268 0 0 0 0 0 0 3332 37 0 0 0 0 0 0
swp0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
swp1: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
swp2: 30824 268 0 0 0 0 0 0 2428 27 0 0 0 0 0 0
sw0p0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
sw0p1: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
sw0p2: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
sw2p0: 29752 268 0 0 0 0 0 0 1564 17 0 0 0 0 0 0
sw2p1: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
sw2p2: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
sw2p3: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0