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author | Joel Granados <joel.granados@gmail.com> | 2023-08-09 13:50:00 +0300 |
---|---|---|
committer | Luis Chamberlain <mcgrof@kernel.org> | 2023-08-16 01:26:17 +0300 |
commit | 95d4977876d6658fdee58be8c8668aac68c25dd2 (patch) | |
tree | 6d100d3ef40dcce07dbe56cb76de6832f44cc983 /include/net/net_namespace.h | |
parent | 3bc269cfd3e119be84b69d95aec3a9e147016bb2 (diff) | |
download | linux-95d4977876d6658fdee58be8c8668aac68c25dd2.tar.xz |
sysctl: Add size to register_net_sysctl function
This commit adds size to the register_net_sysctl indirection function to
facilitate the removal of the sentinel elements (last empty markers)
from the ctl_table arrays. Though we don't actually remove any sentinels
in this commit, register_net_sysctl* now has the capability of
forwarding table_size for when that happens.
We create a new function register_net_sysctl_sz with an extra size
argument. A macro replaces the existing register_net_sysctl. The size in
the macro is SIZE_MAX instead of ARRAY_SIZE to avoid compilation errors
while we systematically migrate to register_net_sysctl_sz. Will change
to ARRAY_SIZE in subsequent commits.
Care is taken to add table_size to the stopping criteria in such a way
that when we remove the empty sentinel element, it will continue
stopping in the last element of the ctl_table array.
Signed-off-by: Joel Granados <j.granados@samsung.com>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Diffstat (limited to 'include/net/net_namespace.h')
-rw-r--r-- | include/net/net_namespace.h | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h index 78beaa765c73..e4e5fe75a281 100644 --- a/include/net/net_namespace.h +++ b/include/net/net_namespace.h @@ -469,15 +469,17 @@ void unregister_pernet_device(struct pernet_operations *); struct ctl_table; +#define register_net_sysctl(net, path, table) \ + register_net_sysctl_sz(net, path, table, SIZE_MAX) #ifdef CONFIG_SYSCTL int net_sysctl_init(void); -struct ctl_table_header *register_net_sysctl(struct net *net, const char *path, - struct ctl_table *table); +struct ctl_table_header *register_net_sysctl_sz(struct net *net, const char *path, + struct ctl_table *table, size_t table_size); void unregister_net_sysctl_table(struct ctl_table_header *header); #else static inline int net_sysctl_init(void) { return 0; } -static inline struct ctl_table_header *register_net_sysctl(struct net *net, - const char *path, struct ctl_table *table) +static inline struct ctl_table_header *register_net_sysctl_sz(struct net *net, + const char *path, struct ctl_table *table, size_t table_size) { return NULL; } |