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sysctl: Pass useful parameters to sysctl permissions

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- Current is implicitly avaiable so passing current->nsproxy isn't useful.
- The ctl_table_header is needed to find how the sysctl table is connected
  to the rest of sysctl.
- ctl_table_root is avaiable in the ctl_table_header so no need to it.

With these changes it becomes possible to write a version of
net_sysctl_permission that takes into account the network namespace of
the sysctl table, an important feature in extending the user namespace.

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric W. Biederman
2012-11-16 03:02:58 +00:00
committed by David S. Miller
parent d328b83682
commit 73f7ef4359
3 changed files with 7 additions and 8 deletions
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3
net/sysctl_net.c
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@@ -38,8 +38,7 @@ static int is_seen(struct ctl_table_set *set)
}
/* Return standard mode bits for table entry. */
static int net_ctl_permissions(struct ctl_table_root *root,
struct nsproxy *nsproxy,
static int net_ctl_permissions(struct ctl_table_header *head,
struct ctl_table *table)
{
/* Allow network administrator to have same access as root. */