On Wed, Jul 26, 2023 at 04:06:25PM +0200, Joel Granados wrote: > This is part of the effort to remove the sentinel element in the > ctl_table arrays. We add a table_size argument to > __register_sysctl_table and adjust callers, all of which pass ctl_table > pointers and need an explicit call to ARRAY_SIZE. > > The new table_size argument does not yet have any effect in the > init_header call which is still dependent on the sentinel's presence. > table_size *does* however drive the `kzalloc` allocation in > __register_sysctl_table with no adverse effects as the allocated memory > is either one element greater than the calculated ctl_table array (for > the calls in ipc_sysctl.c, mq_sysctl.c and ucount.c) or the exact size > of the calculated ctl_table array (for the call from sysctl_net.c and > register_sysctl). This approach will allows us to "just" remove the > sentinel without further changes to __register_sysctl_table as > table_size will represent the exact size for all the callers at that > point. > > Temporarily implement a size calculation in register_net_sysctl, which > is an indirection call for all the network register calls. > > Signed-off-by: Joel Granados <j.granados@xxxxxxxxxxx> > --- > fs/proc/proc_sysctl.c | 22 +++++++++++----------- > include/linux/sysctl.h | 2 +- > ipc/ipc_sysctl.c | 4 +++- > ipc/mq_sysctl.c | 4 +++- > kernel/ucount.c | 3 ++- > net/sysctl_net.c | 8 +++++++- > 6 files changed, 27 insertions(+), 16 deletions(-) > > diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c > index fa1438f1a355..8d04f01a89c1 100644 > --- a/fs/proc/proc_sysctl.c > +++ b/fs/proc/proc_sysctl.c > @@ -1354,27 +1354,20 @@ static struct ctl_dir *sysctl_mkdir_p(struct ctl_dir *dir, const char *path) > */ > struct ctl_table_header *__register_sysctl_table( > struct ctl_table_set *set, > - const char *path, struct ctl_table *table) > + const char *path, struct ctl_table *table, size_t table_size) Hi Joel, Please consider adding table_size to the kernel doc for this function. ...
