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genetlink: optionally validate strictly/dumps

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Add options to strictly validate messages and dump messages,
sometimes perhaps validating dump messages non-strictly may
be required, so add an option for that as well.

Since none of this can really be applied to existing commands,
set the options everwhere using the following spatch:

    @@
    identifier ops;
    expression X;
    @@
    struct genl_ops ops[] = {
    ...,
     {
            .cmd = X,
    +       .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
            ...
     },
    ...
    };

For new commands one should just not copy the .validate 'opt-out'
flags and thus get strict validation.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Johannes Berg
2019-04-26 14:07:31 +02:00
committed by David S. Miller
parent 56738f4608
commit ef6243acb4
37 changed files with 405 additions and 3 deletions
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7
include/net/genetlink.h
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@@ -121,6 +121,12 @@ static inline int genl_err_attr(struct genl_info *info, int err,
return err;
}
enum genl_validate_flags {
GENL_DONT_VALIDATE_STRICT = BIT(0),
GENL_DONT_VALIDATE_DUMP = BIT(1),
GENL_DONT_VALIDATE_DUMP_STRICT = BIT(2),
};
/**
* struct genl_ops - generic netlink operations
* @cmd: command identifier
@@ -141,6 +147,7 @@ struct genl_ops {
u8 cmd;
u8 internal_flags;
u8 flags;
u8 validate;
};
int genl_register_family(struct genl_family *family);