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netns: make /var/run/netns bind-mount recursive 

When ip netns {add|delete} is first run, it bind-mounts /var/run/netns
on top of itself, then marks it as shared. However, if there are already
bind-mounts in the directory from other tools, these would not be
propagated. Fix this by recursively bind-mounting.

Signed-off-by: Casey Callendrello <casey.callendrello@coreos.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Casey Callendrello 2017-08-01 17:46:09 +02:00 committed by Stephen Hemminger
parent aba9c23a6e
commit d6a4076b6b
1 changed files with 1 additions and 1 deletions
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2
ip/ipnetns.c
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@ -636,7 +636,7 @@ static int netns_add(int argc, char **argv)
}
/* Upgrade NETNS_RUN_DIR to a mount point */
if (mount(NETNS_RUN_DIR, NETNS_RUN_DIR, "none", MS_BIND, NULL)) {
if (mount(NETNS_RUN_DIR, NETNS_RUN_DIR, "none", MS_BIND | MS_REC, NULL)) {
fprintf(stderr, "mount --bind %s %s failed: %s\n",
NETNS_RUN_DIR, NETNS_RUN_DIR, strerror(errno));
return -1;