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Subject[PATCH 3/9] sysctl: add netns_proc_dointvec and similar handlers
Date
Signed-off-by: Lucian Adrian Grijincu <lucian.grijincu@gmail.com>
---
include/net/net_namespace.h | 26 ++++++++++++++++++++++++++
net/sysctl_net.c | 31 +++++++++++++++++++++++++++++++
2 files changed, 57 insertions(+), 0 deletions(-)

diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index 1bf812b..0b7d37d 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -276,4 +276,30 @@ extern struct ctl_table_header *register_net_sysctl_rotable(
const struct ctl_path *path, struct ctl_table *table);
extern void unregister_net_sysctl_table(struct ctl_table_header *header);

+/* similar to the versions without 'netns', with these remarks:
+ * - these handlers receive as cookie a 'struct net*'
+ * - the data field of ctl_table* must be of the form
+ * &init_net.member1.member2..memberN
+ * - these handlers will call their equivalent handler with a
+ * ctl_table with data of the form: net->member1.member2..memberN
+ */
+extern int netns_proc_dostring(struct ctl_table *,
+ int, void __user *, size_t *, loff_t *, void *net);
+extern int netns_proc_dointvec(struct ctl_table *, int,
+ void __user *, size_t *, loff_t *, void *net);
+extern int netns_proc_dointvec_minmax(struct ctl_table *, int,
+ void __user *, size_t *, loff_t *, void *net);
+extern int netns_proc_dointvec_jiffies(struct ctl_table *, int,
+ void __user *, size_t *, loff_t *, void *net);
+extern int netns_proc_dointvec_userhz_jiffies(struct ctl_table *, int,
+ void __user *, size_t *, loff_t *, void *net);
+extern int netns_proc_dointvec_ms_jiffies(struct ctl_table *, int,
+ void __user *, size_t *, loff_t *, void *net);
+extern int netns_proc_doulongvec_minmax(struct ctl_table *, int,
+ void __user *, size_t *, loff_t *, void *net);
+extern int netns_proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int,
+ void __user *, size_t *, loff_t *, void *net);
+extern int netns_proc_do_large_bitmap(struct ctl_table *, int,
+ void __user *, size_t *, loff_t *, void *net);
+
#endif /* __NET_NET_NAMESPACE_H */
diff --git a/net/sysctl_net.c b/net/sysctl_net.c
index 9dadd17..60b36ad 100644
--- a/net/sysctl_net.c
+++ b/net/sysctl_net.c
@@ -127,3 +127,34 @@ void unregister_net_sysctl_table(struct ctl_table_header *header)
unregister_sysctl_table(header);
}
EXPORT_SYMBOL_GPL(unregister_net_sysctl_table);
+
+
+
+static int netns_proc_wrapper(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp,
+ loff_t *ppos, void *net, proc_handler proc_handler)
+{
+ struct ctl_table tmp = *table;
+ tmp.data += (char *)net - (char *)&init_net;
+ return ((proc_handler_cookie*) proc_handler)(&tmp, write, buffer, lenp, ppos, NULL);
+}
+
+
+#define NETNS_PROC_WRAP(handler_name) \
+ int netns_##handler_name(struct ctl_table *table, int write, \
+ void __user *buffer, size_t *lenp, \
+ loff_t *ppos, void *net) \
+ { \
+ return netns_proc_wrapper(table, write, buffer, lenp, \
+ ppos, net, handler_name); \
+ } \
+ EXPORT_SYMBOL_GPL(netns_##handler_name);
+
+NETNS_PROC_WRAP(proc_dointvec);
+NETNS_PROC_WRAP(proc_dointvec_minmax);
+NETNS_PROC_WRAP(proc_dointvec_jiffies);
+NETNS_PROC_WRAP(proc_dointvec_userhz_jiffies);
+NETNS_PROC_WRAP(proc_dointvec_ms_jiffies);
+NETNS_PROC_WRAP(proc_doulongvec_minmax)
+NETNS_PROC_WRAP(proc_doulongvec_ms_jiffies_minmax);
+NETNS_PROC_WRAP(proc_do_large_bitmap);
--
1.7.4.rc1.7.g2cf08.dirty


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