Filter: Interpreter merged into the common m4 generator.
The config-time partial evaluation of constant expressions in filters is nearby.
This commit is contained in:
Maria Matejka
parent
32793ab685
commit
d1039926f5
|
|
@ -7,19 +7,19 @@ $(conf-y-targets) $(conf-lex-targets) $(src-o-files): $(o)inst-gen.h
|
|||
|
||||
M4FLAGS_FILTERS=$(filter-out -s,$(M4FLAGS))
|
||||
|
||||
$(o)f-inst-interpret.c: $(s)interpret.m4 $(s)f-inst.c $(objdir)/.dir-stamp
|
||||
$(M4) $(M4FLAGS_FILTERS) -P $^ >$@
|
||||
|
||||
$(o)inst-gen.h: $(s)decl.m4 $(s)f-inst.c $(objdir)/.dir-stamp
|
||||
$(M4) $(M4FLAGS_FILTERS) -DTARGET=H -P $^ >$@
|
||||
|
||||
$(o)inst-gen.c: $(s)decl.m4 $(s)f-inst.c $(objdir)/.dir-stamp
|
||||
$(M4) $(M4FLAGS_FILTERS) -DTARGET=C -P $^ >$@
|
||||
|
||||
$(o)filter.o: $(o)f-inst-interpret.c $(o)inst-gen.h
|
||||
$(o)inst-interpret.c: $(s)decl.m4 $(s)f-inst.c $(objdir)/.dir-stamp
|
||||
$(M4) $(M4FLAGS_FILTERS) -DTARGET=I -P $^ >$@
|
||||
|
||||
$(o)filter.o: $(o)inst-interpret.c $(o)inst-gen.h
|
||||
|
||||
tests_src := tree_test.c filter_test.c trie_test.c
|
||||
tests_targets := $(tests_targets) $(tests-target-files)
|
||||
tests_objs := $(tests_objs) $(src-o-files)
|
||||
|
||||
$(call clean,inst-gen.h inst-gen.c)
|
||||
$(call clean,inst-gen.h inst-gen.c inst-interpret.c)
|
||||
|
|
|
|||
|
|
@ -16,6 +16,7 @@ m4_divert(-1)m4_dnl
|
|||
# 9 same (filter comparator)
|
||||
# 1 union in struct f_inst
|
||||
# 3 constructors
|
||||
# 10 interpreter
|
||||
#
|
||||
# Per-inst Diversions:
|
||||
# 101 content of per-inst struct
|
||||
|
|
@ -24,7 +25,10 @@ m4_divert(-1)m4_dnl
|
|||
# 104 dump line item content
|
||||
# 105 postfixify body
|
||||
# 106 comparator body
|
||||
# 107 struct f_line_item content
|
||||
# 108 interpreter body
|
||||
#
|
||||
# Diversions for TARGET=I: 7xx
|
||||
# Diversions for TARGET=C: 8xx
|
||||
# Diversions for TARGET=H: 9xx
|
||||
|
||||
|
|
@ -43,6 +47,7 @@ m4_define(FID_DUMP, `FID_ZONE(6, Dump line)')
|
|||
m4_define(FID_DUMP_CALLER, `FID_ZONE(7, Dump line caller)')
|
||||
m4_define(FID_POSTFIXIFY, `FID_ZONE(8, Postfixify)')
|
||||
m4_define(FID_SAME, `FID_ZONE(9, Comparison)')
|
||||
m4_define(FID_INTERPRET, `FID_ZONE(10, Interpret)')
|
||||
|
||||
m4_define(FID_STRUCT_IN, `m4_divert(101)')
|
||||
m4_define(FID_NEW_ARGS, `m4_divert(102)')
|
||||
|
|
@ -51,10 +56,14 @@ m4_define(FID_DUMP_BODY, `m4_divert(104)m4_define([[FID_DUMP_BODY_EXISTS]])')
|
|||
m4_define(FID_POSTFIXIFY_BODY, `m4_divert(105)m4_define([[FID_POSTFIXIFY_BODY_EXISTS]])')
|
||||
m4_define(FID_SAME_BODY, `m4_divert(106)')
|
||||
m4_define(FID_LINE_IN, `m4_divert(107)')
|
||||
m4_define(FID_INTERPRET_BODY, `m4_divert(108)')
|
||||
|
||||
m4_define(FID_ALL, `m4_ifdef([[FID_CURDIV]], [[m4_divert(FID_CURDIV)m4_undefine([[FID_CURDIV]])]])')
|
||||
m4_define(FID_C, `m4_ifelse(TARGET, [[C]], FID_ALL, [[m4_define(FID_CURDIV, m4_divnum)m4_divert(-1)]])')
|
||||
m4_define(FID_H, `m4_ifelse(TARGET, [[H]], FID_ALL, [[m4_define(FID_CURDIV, m4_divnum)m4_divert(-1)]])')
|
||||
m4_define(FID_ALL, `FID_INTERPRET_BODY');
|
||||
|
||||
m4_define(FID_ALL_TARGETS, `m4_ifdef([[FID_CURDIV]], [[m4_divert(FID_CURDIV)m4_undefine([[FID_CURDIV]])]])')
|
||||
m4_define(FID_C, `m4_ifelse(TARGET, [[C]], FID_ALL_TARGETS, [[m4_define(FID_CURDIV, m4_divnum)m4_divert(-1)]])')
|
||||
m4_define(FID_I, `m4_ifelse(TARGET, [[I]], FID_ALL_TARGETS, [[m4_define(FID_CURDIV, m4_divnum)m4_divert(-1)]])')
|
||||
m4_define(FID_H, `m4_ifelse(TARGET, [[H]], FID_ALL_TARGETS, [[m4_define(FID_CURDIV, m4_divnum)m4_divert(-1)]])')
|
||||
|
||||
|
||||
m4_define(INST_FLUSH, `m4_ifdef([[INST_NAME]], [[
|
||||
|
|
@ -101,7 +110,7 @@ m4_undefine([[FID_DUMP_BODY_EXISTS]])
|
|||
m4_undivert(104)
|
||||
#undef item
|
||||
}
|
||||
FID_ALL
|
||||
FID_ALL_TARGETS
|
||||
|
||||
FID_POSTFIXIFY
|
||||
case INST_NAME(): {
|
||||
|
|
@ -125,10 +134,23 @@ m4_undivert(106)
|
|||
#undef f2
|
||||
break;
|
||||
|
||||
FID_INTERPRET
|
||||
case INST_NAME():
|
||||
#define whati (&(what->i_]]INST_NAME()[[))
|
||||
m4_ifelse(m4_eval(INST_INVAL() > 0), 1, [[if (vstk.cnt < INST_INVAL()) runtime("Stack underflow"); vstk.cnt -= INST_INVAL(); ]])
|
||||
m4_undivert(108)
|
||||
#undef whati
|
||||
break;
|
||||
|
||||
FID_END
|
||||
]])')
|
||||
|
||||
m4_define(INST, `INST_FLUSH()m4_define([[INST_NAME]], [[$1]])')
|
||||
m4_define(INST, `m4_dnl
|
||||
INST_FLUSH()m4_dnl
|
||||
m4_define([[INST_NAME]], [[$1]])m4_dnl
|
||||
m4_define([[INST_INVAL]], [[$2]])m4_dnl
|
||||
FID_ALL() m4_dnl
|
||||
')
|
||||
|
||||
m4_dnl FID_MEMBER call:
|
||||
m4_dnl type
|
||||
|
|
@ -137,6 +159,7 @@ m4_dnl name in f_line_item
|
|||
m4_dnl comparator for same
|
||||
m4_dnl dump format string
|
||||
m4_dnl dump format args
|
||||
m4_dnl interpreter body
|
||||
m4_define(FID_MEMBER, `m4_dnl
|
||||
FID_LINE_IN
|
||||
$1 $2;
|
||||
|
|
@ -158,9 +181,13 @@ m4_ifelse($5,,,[[
|
|||
FID_DUMP_BODY
|
||||
debug("%s$5\n", INDENT, $6);
|
||||
]])
|
||||
FID_END')
|
||||
m4_ifelse($7,,,[[
|
||||
FID_INTERPRET_BODY
|
||||
$7
|
||||
]])
|
||||
FID_ALL')
|
||||
|
||||
m4_define(ARG, `
|
||||
m4_define(ARG_ANY, `
|
||||
FID_STRUCT_IN
|
||||
const struct f_inst * f$1;
|
||||
FID_NEW_ARGS
|
||||
|
|
@ -169,9 +196,24 @@ FID_NEW_BODY
|
|||
what->f$1 = f$1;
|
||||
for (const struct f_inst *child = f$1; child; child = child->next) what_->size += child->size;
|
||||
FID_POSTFIXIFY_BODY
|
||||
pos = postfixify(dest, what->f$1, pos);
|
||||
FID_END')
|
||||
m4_define(ARG_ANY, `ARG($@)')
|
||||
pos = postfixify(dest, what->f$1, pos);m4_dnl
|
||||
FID_ALL()')
|
||||
|
||||
m4_define(ARG, `ARG_ANY($1)
|
||||
FID_INTERPRET_BODY
|
||||
if (v$1.type != $2) runtime("Argument $1 of instruction %s must be of type $2, got 0x%02x", f_instruction_name(what->fi_code), v$1.type)m4_dnl
|
||||
FID_ALL()')
|
||||
|
||||
m4_define(LINEX, `FID_INTERPRET_BODY
|
||||
do {
|
||||
estk.item[estk.cnt].pos = 0;
|
||||
estk.item[estk.cnt].line = $1;
|
||||
estk.item[estk.cnt].ventry = vstk.cnt;
|
||||
estk.item[estk.cnt].emask = 0;
|
||||
estk.cnt++;
|
||||
} while (0)m4_dnl
|
||||
FID_ALL()')
|
||||
|
||||
m4_define(LINE, `
|
||||
FID_LINE_IN
|
||||
const struct f_line * fl$1;
|
||||
|
|
@ -187,17 +229,26 @@ FID_POSTFIXIFY_BODY
|
|||
item->fl$1 = f_postfixify(what->f$1);
|
||||
FID_SAME_BODY
|
||||
if (!f_same(f1->fl$1, f2->fl$1)) return 0;
|
||||
FID_END')
|
||||
FID_INTERPRET_BODY
|
||||
do { if (whati->fl$1) {
|
||||
LINEX(whati->fl$1);
|
||||
} } while(0)m4_dnl
|
||||
FID_ALL()')
|
||||
|
||||
m4_define(RESULT_OK, `FID_INTERPRET_BODY()vstk.cnt++FID_ALL()')
|
||||
m4_define(RESULT, `RESULT_VAL([[ (struct f_val) { .type = $1, .val.$2 = $3 } ]])')
|
||||
m4_define(RESULT_VAL, `FID_INTERPRET_BODY()do { res = $1; RESULT_OK; } while (0)FID_ALL()')
|
||||
|
||||
m4_define(SYMBOL, `FID_MEMBER(const struct symbol *, sym, sym,
|
||||
[[strcmp(f1->sym->name, f2->sym->name) || (f1->sym->class != f2->sym->class)]], symbol %s, item->sym->name)')
|
||||
m4_define(VAL, `FID_MEMBER(struct f_val $1, val, val m4_ifelse($1,,,[0]), [[!val_same(&f1->val, &f2->val)]], value %s, val_dump(&item->val))')
|
||||
m4_define(FRET, `FID_MEMBER(enum filter_return, fret, fret, f1->fret != f2->fret, %s, filter_return_str(item->fret))')
|
||||
m4_define(ECS, `FID_MEMBER(enum ec_subtype, ecs, ecs, f1->ecs != f2->ecs, ec subtype %s, ec_subtype_str(item->ecs))')
|
||||
m4_define(RTC, `FID_MEMBER(const struct rtable_config *, rtc, rtc, [[strcmp(f1->rtc->name, f2->rtc->name)]], route table %s, item->rtc->name)')
|
||||
m4_define(STATIC_ATTR, `FID_MEMBER(struct f_static_attr, sa, sa, f1->sa.sa_code != f2->sa.sa_code)')
|
||||
m4_define(DYNAMIC_ATTR, `FID_MEMBER(struct f_dynamic_attr, da, da, f1->da.ea_code != f2->da.ea_code)')
|
||||
[[strcmp(f1->sym->name, f2->sym->name) || (f1->sym->class != f2->sym->class)]], symbol %s, item->sym->name, const struct symbol *sym = whati->sym)')
|
||||
m4_define(VAL, `FID_MEMBER(struct f_val $1, val, val m4_ifelse($1,,,[0]), [[!val_same(&f1->val, &f2->val)]], value %s, val_dump(&item->val),)')
|
||||
m4_define(FRET, `FID_MEMBER(enum filter_return, fret, fret, f1->fret != f2->fret, %s, filter_return_str(item->fret), enum filter_return fret = whati->fret)')
|
||||
m4_define(ECS, `FID_MEMBER(enum ec_subtype, ecs, ecs, f1->ecs != f2->ecs, ec subtype %s, ec_subtype_str(item->ecs), enum ec_subtype ecs = whati->ecs)')
|
||||
m4_define(RTC, `FID_MEMBER(const struct rtable_config *, rtc, rtc, [[strcmp(f1->rtc->name, f2->rtc->name)]], route table %s, item->rtc->name, struct rtable *table = whati->rtc->table)')
|
||||
m4_define(STATIC_ATTR, `FID_MEMBER(struct f_static_attr, sa, sa, f1->sa.sa_code != f2->sa.sa_code,,, struct f_static_attr sa = whati->sa)')
|
||||
m4_define(DYNAMIC_ATTR, `FID_MEMBER(struct f_dynamic_attr, da, da, f1->da.ea_code != f2->da.ea_code,,, struct f_dynamic_attr da = whati->da)')
|
||||
m4_define(COUNT, `FID_MEMBER(uint, count, count, f1->count != f2->count, number %u, item->count)')
|
||||
m4_define(TREE, `FID_MEMBER(const struct f_tree *, tree, tree, [[!same_tree(f1->tree, f2->tree)]], tree %p, item->tree)')
|
||||
m4_define(TREE, `FID_MEMBER(const struct f_tree *, tree, tree, [[!same_tree(f1->tree, f2->tree)]], tree %p, item->tree, const struct f_tree *tree = whati->tree)')
|
||||
m4_define(STRING, `FID_MEMBER(const char *, s, s, [[strcmp(f1->s, f2->s)]], string \"%s\", item->s)')
|
||||
|
||||
m4_define(FID_WR_PUT_LIST)
|
||||
|
|
@ -210,6 +261,8 @@ m4_define(FID_WR_DIRECT, `m4_define([[FID_WR_CUR_DIRECT]],$1)m4_ifelse(TARGET,[[
|
|||
|
||||
m4_dnl m4_define(FID_WR_CUR_DIRECT,m4_ifelse(TARGET,`C',800,TARGET,`H',900,m4_errprint(`Bad TARGET: 'TARGET)m4_m4exit(1)))
|
||||
m4_changequote([[,]])
|
||||
FID_WR_DIRECT(700,I)
|
||||
FID_WR_PUT(10)
|
||||
FID_WR_DIRECT(800,C)
|
||||
#include "nest/bird.h"
|
||||
#include "filter/filter.h"
|
||||
|
|
|
|||
|
|
@ -117,7 +117,7 @@
|
|||
dyn++;
|
||||
|
||||
what->count = len;
|
||||
FID_END
|
||||
FID_ALL
|
||||
|
||||
if (vstk.cnt < whati->count) /* TODO: make this check systematic */
|
||||
runtime("Construction of BGP path mask from %u elements must have at least that number of elements", whati->count);
|
||||
|
|
@ -259,7 +259,7 @@
|
|||
if (!val_same(&(f1->val), &(f2->val))) return 0;
|
||||
FID_DUMP_BODY
|
||||
debug("%svalue %s\n", INDENT, val_dump(&item->val));
|
||||
FID_END
|
||||
FID_ALL
|
||||
|
||||
res = whati->val;
|
||||
RESULT_OK;
|
||||
|
|
@ -289,7 +289,7 @@
|
|||
default:
|
||||
bug("Symbol %s of type %d doesn't reference a value", item->sym->name, item->sym->class);
|
||||
}
|
||||
FID_END
|
||||
FID_ALL
|
||||
|
||||
res = *whati->valp;
|
||||
RESULT_OK;
|
||||
|
|
@ -309,7 +309,7 @@
|
|||
FID_POSTFIXIFY_BODY
|
||||
{
|
||||
uint opos = pos;
|
||||
FID_END
|
||||
FID_ALL
|
||||
|
||||
ARG_ANY(1);
|
||||
|
||||
|
|
@ -317,7 +317,7 @@
|
|||
if (opos < pos)
|
||||
dest->items[pos].flags |= FIF_PRINTED;
|
||||
}
|
||||
FID_END
|
||||
FID_ALL
|
||||
|
||||
FRET(2);
|
||||
|
||||
|
|
@ -773,7 +773,7 @@
|
|||
if (strcmp(f1->sym->name, f2->sym->name)) return 0;
|
||||
if (!f_same(f1->args, f2->args)) return 0;
|
||||
if (!f_same(f1->body, f2->body)) return 0;
|
||||
FID_END
|
||||
FID_ALL
|
||||
|
||||
/* First push the body on stack */
|
||||
LINEX(whati->body);
|
||||
|
|
|
|||
|
|
@ -192,7 +192,7 @@ interpret(struct filter_state *fs, const struct f_line *line, struct f_val *val)
|
|||
#define ACCESS_RTE do { if (!fs->rte) runtime("No route to access"); } while (0)
|
||||
#define ACCESS_EATTRS do { if (!fs->eattrs) f_cache_eattrs(fs); } while (0)
|
||||
|
||||
#include "filter/f-inst-interpret.c"
|
||||
#include "filter/inst-interpret.c"
|
||||
#undef res
|
||||
#undef v1
|
||||
#undef v2
|
||||
|
|
|
|||
|
|
@ -1,80 +0,0 @@
|
|||
m4_divert(-1)m4_dnl
|
||||
#
|
||||
# BIRD -- Generator of Filter Instructions
|
||||
#
|
||||
# (c) 2018 Maria Matejka <mq@jmq.cz>
|
||||
#
|
||||
# Can be freely distributed and used under the terms of the GNU GPL.
|
||||
#
|
||||
|
||||
# Common aliases
|
||||
m4_define(DNL, `m4_dnl')
|
||||
|
||||
m4_define(INST_FLUSH, `m4_ifdef([[INST_NAME]], [[
|
||||
m4_divert(1)
|
||||
case INST_NAME():
|
||||
#define whati (&(what->i_]]INST_NAME()[[))
|
||||
m4_ifelse(m4_eval(INST_INVAL() > 0), 1, [[if (vstk.cnt < INST_INVAL()) runtime("Stack underflow"); vstk.cnt -= INST_INVAL(); ]])
|
||||
m4_undivert(2)
|
||||
#undef whati
|
||||
break;
|
||||
m4_divert(-1)
|
||||
]])')
|
||||
|
||||
m4_define(INST, `INST_FLUSH()m4_define([[INST_NAME]], [[$1]])m4_define([[INST_INVAL]], [[$2]])m4_divert(2)')
|
||||
|
||||
m4_define(ARG, `if (v$1.type != $2) runtime("Argument $1 of instruction %s must be of type $2, got 0x%02x", f_instruction_name(what->fi_code), v$1.type)')
|
||||
|
||||
m4_define(RESULT_OK, `vstk.cnt++')
|
||||
m4_define(RESULT, `RESULT_VAL([[ (struct f_val) { .type = $1, .val.$2 = $3 } ]])')
|
||||
m4_define(RESULT_VAL, `do { res = $1; RESULT_OK; } while (0)')
|
||||
|
||||
m4_define(LINEX, `do {
|
||||
estk.item[estk.cnt].pos = 0;
|
||||
estk.item[estk.cnt].line = $1;
|
||||
estk.item[estk.cnt].ventry = vstk.cnt;
|
||||
estk.item[estk.cnt].emask = 0;
|
||||
estk.cnt++;
|
||||
} while (0)')
|
||||
|
||||
m4_define(LINE, `do {
|
||||
if (whati->fl$1) {
|
||||
estk.item[estk.cnt].pos = 0;
|
||||
estk.item[estk.cnt].line = whati->fl$1;
|
||||
estk.item[estk.cnt].ventry = vstk.cnt;
|
||||
estk.item[estk.cnt].emask = 0;
|
||||
estk.cnt++;
|
||||
}
|
||||
} while (0)')
|
||||
|
||||
m4_define(ARG_ANY, `')
|
||||
|
||||
m4_define(SYMBOL, `const struct symbol *sym = whati->sym')
|
||||
|
||||
m4_define(FRET, `enum filter_return fret = whati->fret')
|
||||
m4_define(ECS, `enum ec_subtype ecs = whati->ecs')
|
||||
m4_define(RTC, `struct rtable *table = whati->rtc->table')
|
||||
m4_define(STATIC_ATTR, `struct f_static_attr sa = whati->sa')
|
||||
m4_define(DYNAMIC_ATTR, `struct f_dynamic_attr da = whati->da')
|
||||
m4_define(TREE, `const struct f_tree *tree = whati->tree')
|
||||
m4_define(STRING, `')
|
||||
m4_define(COUNT, `')
|
||||
m4_define(SAME, `')
|
||||
m4_define(FID_STRUCT_IN, `m4_divert(-1)')
|
||||
m4_define(FID_LINE_IN, `m4_divert(-1)')
|
||||
m4_define(FID_NEW_ARGS, `m4_divert(-1)')
|
||||
m4_define(FID_NEW_BODY, `m4_divert(-1)')
|
||||
m4_define(FID_POSTFIXIFY_BODY, `m4_divert(-1)')
|
||||
m4_define(FID_SAME_BODY, `m4_divert(-1)')
|
||||
m4_define(FID_DUMP_BODY, `m4_divert(-1)')
|
||||
m4_define(FID_END, `m4_divert(2)')
|
||||
|
||||
m4_m4wrap(`
|
||||
INST_FLUSH()
|
||||
m4_divert(0)DNL
|
||||
m4_undivert(1)
|
||||
default: bug( "Unknown instruction %d (%c)", what->fi_code, what->fi_code & 0xff);
|
||||
')
|
||||
|
||||
m4_changequote([[,]])
|
||||
|
||||
|
|
@ -1381,3 +1381,9 @@ protocol static
|
|||
vpn4 { table v4; import filter vpn_filter; };
|
||||
route 0:1:2 10.1.10.0/24 unreachable;
|
||||
}
|
||||
|
||||
protocol static
|
||||
{
|
||||
ipv6 { import where false; };
|
||||
route fd01::/48 unreachable;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue