From 2dba676b68ef842025f3afecba26cb0b2ae4c09b Mon Sep 17 00:00:00 2001 From: Jan Engelhardt Date: Sat, 18 Jun 2011 21:34:25 +0200 Subject: extensions: support for per-extension instance "global" variable space Signed-off-by: Jan Engelhardt --- include/xtables.h.in | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) (limited to 'include') diff --git a/include/xtables.h.in b/include/xtables.h.in index 2565dd23..0dead268 100644 --- a/include/xtables.h.in +++ b/include/xtables.h.in @@ -137,11 +137,13 @@ struct xt_option_entry { * @arg: input from command line * @ext_name: name of extension currently being processed * @entry: current option being processed - * @data: per-extension data block + * @data: per-extension kernel data block * @xflags: options of the extension that have been used * @invert: whether option was used with ! * @nvals: number of results in uXX_multi * @val: parsed result + * @udata: per-extension private scratch area + * (cf. xtables_{match,target}->udata_size) */ struct xt_option_call { const char *arg, *ext_name; @@ -174,16 +176,19 @@ struct xt_option_call { struct xt_entry_target **target; }; void *xt_entry; + void *udata; }; /** * @ext_name: name of extension currently being processed - * @data: per-extension data block + * @data: per-extension (kernel) data block + * @udata: per-extension private scratch area + * (cf. xtables_{match,target}->udata_size) * @xflags: options of the extension that have been used */ struct xt_fcheck_call { const char *ext_name; - void *data; + void *data, *udata; unsigned int xflags; }; @@ -254,7 +259,11 @@ struct xtables_match void (*x6_fcheck)(struct xt_fcheck_call *); const struct xt_option_entry *x6_options; + /* Size of per-extension instance extra "global" scratch space */ + size_t udata_size; + /* Ignore these men behind the curtain: */ + void *udata; unsigned int option_offset; struct xt_entry_match *m; unsigned int mflags; @@ -318,7 +327,10 @@ struct xtables_target void (*x6_fcheck)(struct xt_fcheck_call *); const struct xt_option_entry *x6_options; + size_t udata_size; + /* Ignore these men behind the curtain: */ + void *udata; unsigned int option_offset; struct xt_entry_target *t; unsigned int tflags; -- cgit v1.2.3