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Merge branch 'net-evaluate-net-ipvX-conf-all-sysctls'

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Vincent Bernat says:

====================
net: evaluate net.ipvX.conf.all.* sysctls

Some per-interface sysctls are ignoring the "all" variant. This
patchset fixes some of them when such a sysctl is handled as a
boolean. This includes:

 - net.ipvX.conf.all.disable_policy
 - net.ipvX.conf.all.disable_policy.disable_xfrm
 - net.ipv4.conf.all.proxy_arp_pvlan
 - net.ipvX.conf.all.ignore_routes_with_linkdown

Two sysctls are still ignoring the "all" variant as it wouldn't make
much sense for them:

 - net.ipv4.conf.all.tag
 - net.ipv4.conf.all.medium_id

Ideally, the "all" variant should be removed, but there is no simple
alternative to DEVINET_SYSCTL_* macros that would allow one to not
expose and "all" entry.
====================

Link: https://lore.kernel.org/r/20201107193515.1469030-1-vincent@bernat.ch
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2020-11-11 16:41:34 -08:00
commit fc8f29b35c
3 changed files with 11 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
Documentation/networking/ip-sysctl.rst
View File

@ -1554,6 +1554,9 @@ igmpv3_unsolicited_report_interval - INTEGER
Default: 1000 (1 seconds)
ignore_routes_with_linkdown - BOOLEAN
Ignore routes whose link is down when performing a FIB lookup.
promote_secondaries - BOOLEAN
When a primary IP address is removed from this interface
promote a corresponding secondary IP address instead of

4
include/linux/inetdevice.h
View File

@ -105,7 +105,7 @@ static inline void ipv4_devconf_setall(struct in_device *in_dev)
#define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
#define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP)
#define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN)
#define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP_PVLAN)
#define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
#define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
#define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \
@ -126,7 +126,7 @@ static inline void ipv4_devconf_setall(struct in_device *in_dev)
IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
#define IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) \
IN_DEV_CONF_GET((in_dev), IGNORE_ROUTES_WITH_LINKDOWN)
IN_DEV_ORCONF((in_dev), IGNORE_ROUTES_WITH_LINKDOWN)
#define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
#define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT)

12
net/ipv4/route.c
View File

@ -1741,7 +1741,7 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr,
flags |= RTCF_LOCAL;
rth = rt_dst_alloc(dev_net(dev)->loopback_dev, flags, RTN_MULTICAST,
IN_DEV_CONF_GET(in_dev, NOPOLICY), false);
IN_DEV_ORCONF(in_dev, NOPOLICY), false);
if (!rth)
return -ENOBUFS;
@ -1857,8 +1857,8 @@ static int __mkroute_input(struct sk_buff *skb,
}
rth = rt_dst_alloc(out_dev->dev, 0, res->type,
IN_DEV_CONF_GET(in_dev, NOPOLICY),
IN_DEV_CONF_GET(out_dev, NOXFRM));
IN_DEV_ORCONF(in_dev, NOPOLICY),
IN_DEV_ORCONF(out_dev, NOXFRM));
if (!rth) {
err = -ENOBUFS;
goto cleanup;
@ -2227,7 +2227,7 @@ local_input:
rth = rt_dst_alloc(l3mdev_master_dev_rcu(dev) ? : net->loopback_dev,
flags | RTCF_LOCAL, res->type,
IN_DEV_CONF_GET(in_dev, NOPOLICY), false);
IN_DEV_ORCONF(in_dev, NOPOLICY), false);
if (!rth)
goto e_nobufs;
@ -2450,8 +2450,8 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
add:
rth = rt_dst_alloc(dev_out, flags, type,
IN_DEV_CONF_GET(in_dev, NOPOLICY),
IN_DEV_CONF_GET(in_dev, NOXFRM));
IN_DEV_ORCONF(in_dev, NOPOLICY),
IN_DEV_ORCONF(in_dev, NOXFRM));
if (!rth)
return ERR_PTR(-ENOBUFS);