* [PATCH nft v2 3/4] all: add free_const() and use it instead of xfree()
2023-10-24 9:57 [PATCH nft v2 0/4] [RESENT] remove xfree() and add free_const()+nft_gmp_free() Thomas Haller
2023-10-24 9:57 ` [PATCH nft v2 1/4] datatype: don't return a const string from cgroupv2_get_path() Thomas Haller
2023-10-24 9:57 ` [PATCH nft v2 2/4] gmputil: add nft_gmp_free() to free strings from mpz_get_str() Thomas Haller
@ 2023-10-24 9:57 ` Thomas Haller
2023-10-24 9:57 ` [PATCH nft v2 4/4] all: remove xfree() and use plain free() Thomas Haller
` (2 subsequent siblings)
5 siblings, 0 replies; 10+ messages in thread
From: Thomas Haller @ 2023-10-24 9:57 UTC (permalink / raw)
To: NetFilter; +Cc: Thomas Haller
Almost everywhere xmalloc() and friends is used instead of malloc().
This is almost everywhere paired with xfree().
xfree() has two problems. First, it brings the wrong notion that
xmalloc() should be paired with xfree(), as if xmalloc() would not use
the plain malloc() allocator. In practices, xfree() just wraps free(),
and it wouldn't make sense any other way. xfree() should go away. This
will be addressed in the next commit.
The problem addressed by this commit is that xfree() accepts a const
pointer. Paired with the practice of almost always using xfree() instead
of free(), all our calls to xfree() cast away constness of the pointer,
regardless whether that is necessary. Declaring a pointer as const
should help us to catch wrong uses. If the xfree() function always casts
aways const, the compiler doesn't help.
There are many places that rightly cast away const during free. But not
all of them. Add a free_const() macro, which is like free(), but accepts
const pointers. We should always make an intentional choice whether to
use free() or free_const(). Having a free_const() macro makes this very
common choice clearer, instead of adding a (void*) cast at many places.
Note that we now pair xmalloc() allocations with a free() call (instead
of xfree(). That inconsistency will be resolved in the next commit.
Signed-off-by: Thomas Haller <thaller@redhat.com>
---
include/nft.h | 6 ++
src/ct.c | 2 +-
src/datatype.c | 8 +--
src/evaluate.c | 8 +--
src/expression.c | 4 +-
src/libnftables.c | 12 ++--
src/mnl.c | 12 ++--
src/optimize.c | 2 +-
src/parser_bison.y | 144 ++++++++++++++++++++++-----------------------
src/rule.c | 36 ++++++------
src/scanner.l | 4 +-
src/statement.c | 2 +-
src/xt.c | 2 +-
13 files changed, 124 insertions(+), 118 deletions(-)
diff --git a/include/nft.h b/include/nft.h
index 3c894e5b67a7..a2d62dbf4808 100644
--- a/include/nft.h
+++ b/include/nft.h
@@ -9,4 +9,10 @@
#include <stdlib.h>
#include <string.h>
+/* Just free(), but casts to a (void*). This is for places where
+ * we have a const pointer that we know we want to free. We could just
+ * do the (void*) cast, but free_const() makes it clear that this is
+ * something we frequently need to do and it's intentional. */
+#define free_const(ptr) free((void *)(ptr))
+
#endif /* NFTABLES_NFT_H */
diff --git a/src/ct.c b/src/ct.c
index 1dda799d117e..ebfd90a1ab0d 100644
--- a/src/ct.c
+++ b/src/ct.c
@@ -570,7 +570,7 @@ static void flow_offload_stmt_print(const struct stmt *stmt,
static void flow_offload_stmt_destroy(struct stmt *stmt)
{
- xfree(stmt->flow.table_name);
+ free_const(stmt->flow.table_name);
}
static const struct stmt_ops flow_offload_stmt_ops = {
diff --git a/src/datatype.c b/src/datatype.c
index 6362735809f7..ca251138bba9 100644
--- a/src/datatype.c
+++ b/src/datatype.c
@@ -908,8 +908,8 @@ void rt_symbol_table_free(const struct symbol_table *tbl)
const struct symbolic_constant *s;
for (s = tbl->symbols; s->identifier != NULL; s++)
- xfree(s->identifier);
- xfree(tbl);
+ free_const(s->identifier);
+ free_const(tbl);
}
void mark_table_init(struct nft_ctx *ctx)
@@ -1266,8 +1266,8 @@ void datatype_free(const struct datatype *ptr)
if (--dtype->refcnt > 0)
return;
- xfree(dtype->name);
- xfree(dtype->desc);
+ free_const(dtype->name);
+ free_const(dtype->desc);
xfree(dtype);
}
diff --git a/src/evaluate.c b/src/evaluate.c
index 9d5f0e4d94ad..be90a13f05a1 100644
--- a/src/evaluate.c
+++ b/src/evaluate.c
@@ -4013,7 +4013,7 @@ static int stmt_evaluate_chain(struct eval_ctx *ctx, struct stmt *stmt)
memset(&h, 0, sizeof(h));
handle_merge(&h, &chain->handle);
h.family = ctx->rule->handle.family;
- xfree(h.table.name);
+ free_const(h.table.name);
h.table.name = xstrdup(ctx->rule->handle.table.name);
h.chain.location = stmt->location;
h.chain_id = chain->handle.chain_id;
@@ -4033,9 +4033,9 @@ static int stmt_evaluate_chain(struct eval_ctx *ctx, struct stmt *stmt)
struct handle h2 = {};
handle_merge(&rule->handle, &ctx->rule->handle);
- xfree(rule->handle.table.name);
+ free_const(rule->handle.table.name);
rule->handle.table.name = xstrdup(ctx->rule->handle.table.name);
- xfree(rule->handle.chain.name);
+ free_const(rule->handle.chain.name);
rule->handle.chain.name = NULL;
rule->handle.chain_id = chain->handle.chain_id;
if (rule_evaluate(&rule_ctx, rule, CMD_INVALID) < 0)
@@ -5138,7 +5138,7 @@ static int ct_timeout_evaluate(struct eval_ctx *ctx, struct obj *obj)
ct->timeout[ts->timeout_index] = ts->timeout_value;
list_del(&ts->head);
- xfree(ts->timeout_str);
+ free_const(ts->timeout_str);
xfree(ts);
}
diff --git a/src/expression.c b/src/expression.c
index a21dfec25722..0b4a537af526 100644
--- a/src/expression.c
+++ b/src/expression.c
@@ -314,7 +314,7 @@ static void symbol_expr_clone(struct expr *new, const struct expr *expr)
static void symbol_expr_destroy(struct expr *expr)
{
- xfree(expr->identifier);
+ free_const(expr->identifier);
}
static const struct expr_ops symbol_expr_ops = {
@@ -1335,7 +1335,7 @@ static void set_elem_expr_destroy(struct expr *expr)
{
struct stmt *stmt, *next;
- xfree(expr->comment);
+ free_const(expr->comment);
expr_free(expr->key);
list_for_each_entry_safe(stmt, next, &expr->stmt_list, list)
stmt_free(stmt);
diff --git a/src/libnftables.c b/src/libnftables.c
index 41f54c0c7370..866b5c6be6c8 100644
--- a/src/libnftables.c
+++ b/src/libnftables.c
@@ -154,8 +154,8 @@ void nft_ctx_clear_vars(struct nft_ctx *ctx)
unsigned int i;
for (i = 0; i < ctx->num_vars; i++) {
- xfree(ctx->vars[i].key);
- xfree(ctx->vars[i].value);
+ free_const(ctx->vars[i].key);
+ free_const(ctx->vars[i].value);
}
ctx->num_vars = 0;
xfree(ctx->vars);
@@ -743,12 +743,12 @@ err:
list_for_each_entry_safe(indesc, next, &nft->vars_ctx.indesc_list, list) {
if (indesc->name)
- xfree(indesc->name);
+ free_const(indesc->name);
xfree(indesc);
}
}
- xfree(nft->vars_ctx.buf);
+ free_const(nft->vars_ctx.buf);
if (!rc &&
nft_output_json(&nft->output) &&
@@ -799,12 +799,12 @@ int nft_run_cmd_from_filename(struct nft_ctx *nft, const char *filename)
if (nft->optimize_flags) {
ret = nft_run_optimized_file(nft, filename);
- xfree(nft->stdin_buf);
+ free_const(nft->stdin_buf);
return ret;
}
ret = __nft_run_cmd_from_filename(nft, filename);
- xfree(nft->stdin_buf);
+ free_const(nft->stdin_buf);
return ret;
}
diff --git a/src/mnl.c b/src/mnl.c
index 0fb36bd588ee..0158924c2f50 100644
--- a/src/mnl.c
+++ b/src/mnl.c
@@ -776,9 +776,9 @@ static void nft_dev_array_free(const struct nft_dev *dev_array)
int i = 0;
while (dev_array[i].ifname != NULL)
- xfree(dev_array[i++].ifname);
+ free_const(dev_array[i++].ifname);
- xfree(dev_array);
+ free_const(dev_array);
}
static void mnl_nft_chain_devs_build(struct nlmsghdr *nlh, struct cmd *cmd)
@@ -2175,10 +2175,10 @@ static struct basehook *basehook_alloc(void)
static void basehook_free(struct basehook *b)
{
list_del(&b->list);
- xfree(b->module_name);
- xfree(b->hookfn);
- xfree(b->chain);
- xfree(b->table);
+ free_const(b->module_name);
+ free_const(b->hookfn);
+ free_const(b->chain);
+ free_const(b->table);
xfree(b);
}
diff --git a/src/optimize.c b/src/optimize.c
index 27e0ffe1e124..9ae9283d7b6c 100644
--- a/src/optimize.c
+++ b/src/optimize.c
@@ -1194,7 +1194,7 @@ static void merge_rules(const struct optimize_ctx *ctx,
}
if (ctx->rule[from]->comment) {
- xfree(ctx->rule[from]->comment);
+ free_const(ctx->rule[from]->comment);
ctx->rule[from]->comment = NULL;
}
diff --git a/src/parser_bison.y b/src/parser_bison.y
index f0652ba651c6..8f202bbee207 100644
--- a/src/parser_bison.y
+++ b/src/parser_bison.y
@@ -153,13 +153,13 @@ static struct expr *ifname_expr_alloc(const struct location *location,
struct expr *expr;
if (length == 0) {
- xfree(name);
+ free_const(name);
erec_queue(error(location, "empty interface name"), queue);
return NULL;
}
if (length > 16) {
- xfree(name);
+ free_const(name);
erec_queue(error(location, "interface name too long"), queue);
return NULL;
}
@@ -167,7 +167,7 @@ static struct expr *ifname_expr_alloc(const struct location *location,
expr = constant_expr_alloc(location, &ifname_type, BYTEORDER_HOST_ENDIAN,
length * BITS_PER_BYTE, name);
- xfree(name);
+ free_const(name);
return expr;
}
@@ -357,7 +357,7 @@ int nft_lex(void *, void *, void *);
%token <string> STRING "string"
%token <string> QUOTED_STRING "quoted string"
%token <string> ASTERISK_STRING "string with a trailing asterisk"
-%destructor { xfree($$); } STRING QUOTED_STRING ASTERISK_STRING
+%destructor { free_const($$); } STRING QUOTED_STRING ASTERISK_STRING
%token LL_HDR "ll"
%token NETWORK_HDR "nh"
@@ -673,7 +673,7 @@ int nft_lex(void *, void *, void *);
%type <limit_rate> limit_rate_bytes
%type <string> identifier type_identifier string comment_spec
-%destructor { xfree($$); } identifier type_identifier string comment_spec
+%destructor { free_const($$); } identifier type_identifier string comment_spec
%type <val> time_spec time_spec_or_num_s quota_used
@@ -708,7 +708,7 @@ int nft_lex(void *, void *, void *);
%type <val32> int_num chain_policy
%type <prio_spec> extended_prio_spec prio_spec
%type <string> extended_prio_name quota_unit basehook_device_name
-%destructor { xfree($$); } extended_prio_name quota_unit basehook_device_name
+%destructor { free_const($$); } extended_prio_name quota_unit basehook_device_name
%type <expr> dev_spec
%destructor { xfree($$); } dev_spec
@@ -927,7 +927,7 @@ int nft_lex(void *, void *, void *);
%type <val> markup_format
%type <string> monitor_event
-%destructor { xfree($$); } monitor_event
+%destructor { free_const($$); } monitor_event
%type <val> monitor_object monitor_format
%type <val> synproxy_ts synproxy_sack
@@ -1052,10 +1052,10 @@ close_scope_xt : { scanner_pop_start_cond(nft->scanner, PARSER_SC_XT); }
common_block : INCLUDE QUOTED_STRING stmt_separator
{
if (scanner_include_file(nft, scanner, $2, &@$) < 0) {
- xfree($2);
+ free_const($2);
YYERROR;
}
- xfree($2);
+ free_const($2);
}
| DEFINE identifier '=' initializer_expr stmt_separator
{
@@ -1065,19 +1065,19 @@ common_block : INCLUDE QUOTED_STRING stmt_separator
erec_queue(error(&@2, "redefinition of symbol '%s'", $2),
state->msgs);
expr_free($4);
- xfree($2);
+ free_const($2);
YYERROR;
}
symbol_bind(scope, $2, $4);
- xfree($2);
+ free_const($2);
}
| REDEFINE identifier '=' initializer_expr stmt_separator
{
struct scope *scope = current_scope(state);
symbol_bind(scope, $2, $4);
- xfree($2);
+ free_const($2);
}
| UNDEFINE identifier stmt_separator
{
@@ -1086,10 +1086,10 @@ common_block : INCLUDE QUOTED_STRING stmt_separator
if (symbol_unbind(scope, $2) < 0) {
erec_queue(error(&@2, "undefined symbol '%s'", $2),
state->msgs);
- xfree($2);
+ free_const($2);
YYERROR;
}
- xfree($2);
+ free_const($2);
}
| error stmt_separator
{
@@ -1878,21 +1878,21 @@ table_options : FLAGS STRING
{
if (strcmp($2, "dormant") == 0) {
$<table>0->flags |= TABLE_F_DORMANT;
- xfree($2);
+ free_const($2);
} else if (strcmp($2, "owner") == 0) {
$<table>0->flags |= TABLE_F_OWNER;
- xfree($2);
+ free_const($2);
} else {
erec_queue(error(&@2, "unknown table option %s", $2),
state->msgs);
- xfree($2);
+ free_const($2);
YYERROR;
}
}
| comment_spec
{
if (already_set($<table>0->comment, &@$, state)) {
- xfree($1);
+ free_const($1);
YYERROR;
}
$<table>0->comment = $1;
@@ -2063,7 +2063,7 @@ chain_block : /* empty */ { $$ = $<chain>-1; }
| chain_block comment_spec stmt_separator
{
if (already_set($1->comment, &@2, state)) {
- xfree($2);
+ free_const($2);
YYERROR;
}
$1->comment = $2;
@@ -2189,7 +2189,7 @@ set_block : /* empty */ { $$ = $<set>-1; }
| set_block comment_spec stmt_separator
{
if (already_set($1->comment, &@2, state)) {
- xfree($2);
+ free_const($2);
YYERROR;
}
$1->comment = $2;
@@ -2306,7 +2306,7 @@ map_block : /* empty */ { $$ = $<set>-1; }
| map_block comment_spec stmt_separator
{
if (already_set($1->comment, &@2, state)) {
- xfree($2);
+ free_const($2);
YYERROR;
}
$1->comment = $2;
@@ -2345,10 +2345,10 @@ flowtable_block : /* empty */ { $$ = $<flowtable>-1; }
if ($$->hook.name == NULL) {
erec_queue(error(&@3, "unknown chain hook"),
state->msgs);
- xfree($3);
+ free_const($3);
YYERROR;
}
- xfree($3);
+ free_const($3);
$$->priority = $4;
}
@@ -2422,12 +2422,12 @@ data_type_atom_expr : type_identifier
if (dtype == NULL) {
erec_queue(error(&@1, "unknown datatype %s", $1),
state->msgs);
- xfree($1);
+ free_const($1);
YYERROR;
}
$$ = constant_expr_alloc(&@1, dtype, dtype->byteorder,
dtype->size, NULL);
- xfree($1);
+ free_const($1);
}
| TIME
{
@@ -2464,7 +2464,7 @@ counter_block : /* empty */ { $$ = $<obj>-1; }
| counter_block comment_spec
{
if (already_set($<obj>1->comment, &@2, state)) {
- xfree($2);
+ free_const($2);
YYERROR;
}
$<obj>1->comment = $2;
@@ -2481,7 +2481,7 @@ quota_block : /* empty */ { $$ = $<obj>-1; }
| quota_block comment_spec
{
if (already_set($<obj>1->comment, &@2, state)) {
- xfree($2);
+ free_const($2);
YYERROR;
}
$<obj>1->comment = $2;
@@ -2498,7 +2498,7 @@ ct_helper_block : /* empty */ { $$ = $<obj>-1; }
| ct_helper_block comment_spec
{
if (already_set($<obj>1->comment, &@2, state)) {
- xfree($2);
+ free_const($2);
YYERROR;
}
$<obj>1->comment = $2;
@@ -2519,7 +2519,7 @@ ct_timeout_block : /*empty */
| ct_timeout_block comment_spec
{
if (already_set($<obj>1->comment, &@2, state)) {
- xfree($2);
+ free_const($2);
YYERROR;
}
$<obj>1->comment = $2;
@@ -2536,7 +2536,7 @@ ct_expect_block : /*empty */ { $$ = $<obj>-1; }
| ct_expect_block comment_spec
{
if (already_set($<obj>1->comment, &@2, state)) {
- xfree($2);
+ free_const($2);
YYERROR;
}
$<obj>1->comment = $2;
@@ -2553,7 +2553,7 @@ limit_block : /* empty */ { $$ = $<obj>-1; }
| limit_block comment_spec
{
if (already_set($<obj>1->comment, &@2, state)) {
- xfree($2);
+ free_const($2);
YYERROR;
}
$<obj>1->comment = $2;
@@ -2570,7 +2570,7 @@ secmark_block : /* empty */ { $$ = $<obj>-1; }
| secmark_block comment_spec
{
if (already_set($<obj>1->comment, &@2, state)) {
- xfree($2);
+ free_const($2);
YYERROR;
}
$<obj>1->comment = $2;
@@ -2587,7 +2587,7 @@ synproxy_block : /* empty */ { $$ = $<obj>-1; }
| synproxy_block comment_spec
{
if (already_set($<obj>1->comment, &@2, state)) {
- xfree($2);
+ free_const($2);
YYERROR;
}
$<obj>1->comment = $2;
@@ -2608,12 +2608,12 @@ hook_spec : TYPE close_scope_type STRING HOOK STRING dev_spec prio_spec
if (chain_type == NULL) {
erec_queue(error(&@3, "unknown chain type"),
state->msgs);
- xfree($3);
+ free_const($3);
YYERROR;
}
$<chain>0->type.loc = @3;
$<chain>0->type.str = xstrdup(chain_type);
- xfree($3);
+ free_const($3);
$<chain>0->loc = @$;
$<chain>0->hook.loc = @5;
@@ -2621,10 +2621,10 @@ hook_spec : TYPE close_scope_type STRING HOOK STRING dev_spec prio_spec
if ($<chain>0->hook.name == NULL) {
erec_queue(error(&@5, "unknown chain hook"),
state->msgs);
- xfree($5);
+ free_const($5);
YYERROR;
}
- xfree($5);
+ free_const($5);
$<chain>0->dev_expr = $6;
$<chain>0->priority = $7;
@@ -2671,7 +2671,7 @@ extended_prio_spec : int_num
BYTEORDER_HOST_ENDIAN,
strlen($1) * BITS_PER_BYTE,
$1);
- xfree($1);
+ free_const($1);
$$ = spec;
}
| extended_prio_name PLUS NUM
@@ -2684,7 +2684,7 @@ extended_prio_spec : int_num
BYTEORDER_HOST_ENDIAN,
strlen(str) * BITS_PER_BYTE,
str);
- xfree($1);
+ free_const($1);
$$ = spec;
}
| extended_prio_name DASH NUM
@@ -2697,7 +2697,7 @@ extended_prio_spec : int_num
BYTEORDER_HOST_ENDIAN,
strlen(str) * BITS_PER_BYTE,
str);
- xfree($1);
+ free_const($1);
$$ = spec;
}
;
@@ -2782,7 +2782,7 @@ time_spec : STRING
uint64_t res;
erec = time_parse(&@1, $1, &res);
- xfree($1);
+ free_const($1);
if (erec != NULL) {
erec_queue(erec, state->msgs);
YYERROR;
@@ -2983,7 +2983,7 @@ comment_spec : COMMENT string
erec_queue(error(&@2, "comment too long, %d characters maximum allowed",
NFTNL_UDATA_COMMENT_MAXLEN),
state->msgs);
- xfree($2);
+ free_const($2);
YYERROR;
}
$$ = $2;
@@ -3084,8 +3084,8 @@ stmt : verdict_stmt
xt_stmt : XT STRING string
{
$$ = NULL;
- xfree($2);
- xfree($3);
+ free_const($2);
+ free_const($3);
erec_queue(error(&@$, "unsupported xtables compat expression, use iptables-nft with this ruleset"),
state->msgs);
YYERROR;
@@ -3243,7 +3243,7 @@ log_arg : PREFIX string
expr = constant_expr_alloc(&@$, &string_type,
BYTEORDER_HOST_ENDIAN,
(strlen($2) + 1) * BITS_PER_BYTE, $2);
- xfree($2);
+ free_const($2);
$<stmt>0->log.prefix = expr;
$<stmt>0->log.flags |= STMT_LOG_PREFIX;
break;
@@ -3317,7 +3317,7 @@ log_arg : PREFIX string
state->msgs);
}
expr_free(expr);
- xfree($2);
+ free_const($2);
YYERROR;
}
item = variable_expr_alloc(&@$, scope, sym);
@@ -3347,7 +3347,7 @@ log_arg : PREFIX string
}
}
- xfree($2);
+ free_const($2);
$<stmt>0->log.prefix = expr;
$<stmt>0->log.flags |= STMT_LOG_PREFIX;
}
@@ -3400,10 +3400,10 @@ level_type : string
else {
erec_queue(error(&@1, "invalid log level"),
state->msgs);
- xfree($1);
+ free_const($1);
YYERROR;
}
- xfree($1);
+ free_const($1);
}
;
@@ -3493,7 +3493,7 @@ quota_used : /* empty */ { $$ = 0; }
uint64_t rate;
erec = data_unit_parse(&@$, $3, &rate);
- xfree($3);
+ free_const($3);
if (erec != NULL) {
erec_queue(erec, state->msgs);
YYERROR;
@@ -3508,7 +3508,7 @@ quota_stmt : QUOTA quota_mode NUM quota_unit quota_used close_scope_quota
uint64_t rate;
erec = data_unit_parse(&@$, $4, &rate);
- xfree($4);
+ free_const($4);
if (erec != NULL) {
erec_queue(erec, state->msgs);
YYERROR;
@@ -3552,7 +3552,7 @@ limit_rate_bytes : NUM STRING
uint64_t rate, unit;
erec = rate_parse(&@$, $2, &rate, &unit);
- xfree($2);
+ free_const($2);
if (erec != NULL) {
erec_queue(erec, state->msgs);
YYERROR;
@@ -3574,7 +3574,7 @@ limit_bytes : NUM BYTES { $$ = $1; }
uint64_t rate;
erec = data_unit_parse(&@$, $2, &rate);
- xfree($2);
+ free_const($2);
if (erec != NULL) {
erec_queue(erec, state->msgs);
YYERROR;
@@ -3603,7 +3603,7 @@ reject_with_expr : STRING
{
$$ = symbol_expr_alloc(&@$, SYMBOL_VALUE,
current_scope(state), $1);
- xfree($1);
+ free_const($1);
}
| integer_expr { $$ = $1; }
;
@@ -4267,12 +4267,12 @@ variable_expr : '$' identifier
erec_queue(error(&@2, "unknown identifier '%s'", $2),
state->msgs);
}
- xfree($2);
+ free_const($2);
YYERROR;
}
$$ = variable_expr_alloc(&@$, scope, sym);
- xfree($2);
+ free_const($2);
}
;
@@ -4282,7 +4282,7 @@ symbol_expr : variable_expr
$$ = symbol_expr_alloc(&@$, SYMBOL_VALUE,
current_scope(state),
$1);
- xfree($1);
+ free_const($1);
}
;
@@ -4295,7 +4295,7 @@ set_ref_symbol_expr : AT identifier close_scope_at
$$ = symbol_expr_alloc(&@$, SYMBOL_SET,
current_scope(state),
$2);
- xfree($2);
+ free_const($2);
}
;
@@ -4392,10 +4392,10 @@ osf_ttl : /* empty */
else {
erec_queue(error(&@2, "invalid ttl option"),
state->msgs);
- xfree($2);
+ free_const($2);
YYERROR;
}
- xfree($2);
+ free_const($2);
}
;
@@ -4565,7 +4565,7 @@ set_elem_option : TIMEOUT time_spec
| comment_spec
{
if (already_set($<expr>0->comment, &@1, state)) {
- xfree($1);
+ free_const($1);
YYERROR;
}
$<expr>0->comment = $1;
@@ -4647,7 +4647,7 @@ set_elem_stmt : COUNTER close_scope_counter
uint64_t rate;
erec = data_unit_parse(&@$, $4, &rate);
- xfree($4);
+ free_const($4);
if (erec != NULL) {
erec_queue(erec, state->msgs);
YYERROR;
@@ -4680,7 +4680,7 @@ set_elem_expr_option : TIMEOUT time_spec
| comment_spec
{
if (already_set($<expr>0->comment, &@1, state)) {
- xfree($1);
+ free_const($1);
YYERROR;
}
$<expr>0->comment = $1;
@@ -4732,7 +4732,7 @@ quota_config : quota_mode NUM quota_unit quota_used
uint64_t rate;
erec = data_unit_parse(&@$, $3, &rate);
- xfree($3);
+ free_const($3);
if (erec != NULL) {
erec_queue(erec, state->msgs);
YYERROR;
@@ -4761,10 +4761,10 @@ secmark_config : string
ret = snprintf(secmark->ctx, sizeof(secmark->ctx), "%s", $1);
if (ret <= 0 || ret >= (int)sizeof(secmark->ctx)) {
erec_queue(error(&@1, "invalid context '%s', max length is %u\n", $1, (int)sizeof(secmark->ctx)), state->msgs);
- xfree($1);
+ free_const($1);
YYERROR;
}
- xfree($1);
+ free_const($1);
}
;
@@ -4801,7 +4801,7 @@ ct_helper_config : TYPE QUOTED_STRING PROTOCOL ct_l4protoname stmt_separator cl
erec_queue(error(&@2, "invalid name '%s', max length is %u\n", $2, (int)sizeof(ct->name)), state->msgs);
YYERROR;
}
- xfree($2);
+ free_const($2);
ct->l4proto = $4;
}
@@ -5196,7 +5196,7 @@ chain_expr : variable_expr
BYTEORDER_HOST_ENDIAN,
strlen($1) * BITS_PER_BYTE,
$1);
- xfree($1);
+ free_const($1);
}
;
@@ -5214,7 +5214,7 @@ meta_expr : META meta_key close_scope_meta
unsigned int key;
erec = meta_key_parse(&@$, $2, &key);
- xfree($2);
+ free_const($2);
if (erec != NULL) {
erec_queue(erec, state->msgs);
YYERROR;
@@ -5291,7 +5291,7 @@ meta_stmt : META meta_key SET stmt_expr close_scope_meta
unsigned int key;
erec = meta_key_parse(&@$, $2, &key);
- xfree($2);
+ free_const($2);
if (erec != NULL) {
erec_queue(erec, state->msgs);
YYERROR;
@@ -5602,10 +5602,10 @@ payload_base_spec : LL_HDR { $$ = PROTO_BASE_LL_HDR; }
$$ = PROTO_BASE_INNER_HDR;
} else {
erec_queue(error(&@1, "unknown raw payload base"), state->msgs);
- xfree($1);
+ free_const($1);
YYERROR;
}
- xfree($1);
+ free_const($1);
}
;
diff --git a/src/rule.c b/src/rule.c
index 739b7a541583..b40a54d77759 100644
--- a/src/rule.c
+++ b/src/rule.c
@@ -104,11 +104,11 @@ int timeout_str2num(uint16_t l4proto, struct timeout_state *ts)
void handle_free(struct handle *h)
{
- xfree(h->table.name);
- xfree(h->chain.name);
- xfree(h->set.name);
- xfree(h->flowtable.name);
- xfree(h->obj.name);
+ free_const(h->table.name);
+ free_const(h->chain.name);
+ free_const(h->set.name);
+ free_const(h->flowtable.name);
+ free_const(h->obj.name);
}
void handle_merge(struct handle *dst, const struct handle *src)
@@ -194,7 +194,7 @@ void set_free(struct set *set)
expr_free(set->init);
if (set->comment)
- xfree(set->comment);
+ free_const(set->comment);
handle_free(&set->handle);
list_for_each_entry_safe(stmt, next, &set->stmt_list, list)
stmt_free(stmt);
@@ -479,7 +479,7 @@ void rule_free(struct rule *rule)
return;
stmt_list_free(&rule->stmts);
handle_free(&rule->handle);
- xfree(rule->comment);
+ free_const(rule->comment);
xfree(rule);
}
@@ -557,7 +557,7 @@ void scope_release(const struct scope *scope)
list_for_each_entry_safe(sym, next, &scope->symbols, list) {
assert(sym->refcnt == 1);
list_del(&sym->list);
- xfree(sym->identifier);
+ free_const(sym->identifier);
expr_free(sym->expr);
xfree(sym);
}
@@ -597,7 +597,7 @@ struct symbol *symbol_get(const struct scope *scope, const char *identifier)
static void symbol_put(struct symbol *sym)
{
if (--sym->refcnt == 0) {
- xfree(sym->identifier);
+ free_const(sym->identifier);
expr_free(sym->expr);
xfree(sym);
}
@@ -730,14 +730,14 @@ void chain_free(struct chain *chain)
rule_free(rule);
handle_free(&chain->handle);
scope_release(&chain->scope);
- xfree(chain->type.str);
+ free_const(chain->type.str);
expr_free(chain->dev_expr);
for (i = 0; i < chain->dev_array_len; i++)
- xfree(chain->dev_array[i]);
+ free_const(chain->dev_array[i]);
xfree(chain->dev_array);
expr_free(chain->priority.expr);
expr_free(chain->policy);
- xfree(chain->comment);
+ free_const(chain->comment);
xfree(chain);
}
@@ -1151,7 +1151,7 @@ void table_free(struct table *table)
if (--table->refcnt > 0)
return;
if (table->comment)
- xfree(table->comment);
+ free_const(table->comment);
list_for_each_entry_safe(chain, next, &table->chains, list)
chain_free(chain);
list_for_each_entry_safe(chain, next, &table->chain_bindings, cache.list)
@@ -1348,7 +1348,7 @@ struct monitor *monitor_alloc(uint32_t format, uint32_t type, const char *event)
void monitor_free(struct monitor *m)
{
- xfree(m->event);
+ free_const(m->event);
xfree(m);
}
@@ -1404,7 +1404,7 @@ void cmd_free(struct cmd *cmd)
}
}
xfree(cmd->attr);
- xfree(cmd->arg);
+ free_const(cmd->arg);
xfree(cmd);
}
@@ -1642,14 +1642,14 @@ void obj_free(struct obj *obj)
{
if (--obj->refcnt > 0)
return;
- xfree(obj->comment);
+ free_const(obj->comment);
handle_free(&obj->handle);
if (obj->type == NFT_OBJECT_CT_TIMEOUT) {
struct timeout_state *ts, *next;
list_for_each_entry_safe(ts, next, &obj->ct_timeout.timeout_list, head) {
list_del(&ts->head);
- xfree(ts->timeout_str);
+ free_const(ts->timeout_str);
xfree(ts);
}
}
@@ -2062,7 +2062,7 @@ void flowtable_free(struct flowtable *flowtable)
if (flowtable->dev_array != NULL) {
for (i = 0; i < flowtable->dev_array_len; i++)
- xfree(flowtable->dev_array[i]);
+ free_const(flowtable->dev_array[i]);
xfree(flowtable->dev_array);
}
xfree(flowtable);
diff --git a/src/scanner.l b/src/scanner.l
index 88376b7a2199..93a31f27fe10 100644
--- a/src/scanner.l
+++ b/src/scanner.l
@@ -1261,8 +1261,8 @@ void *scanner_init(struct parser_state *state)
static void input_descriptor_destroy(const struct input_descriptor *indesc)
{
if (indesc->name)
- xfree(indesc->name);
- xfree(indesc);
+ free_const(indesc->name);
+ free_const(indesc);
}
static void input_descriptor_list_destroy(struct parser_state *state)
diff --git a/src/statement.c b/src/statement.c
index 475611664946..801784089f47 100644
--- a/src/statement.c
+++ b/src/statement.c
@@ -183,7 +183,7 @@ static void meter_stmt_destroy(struct stmt *stmt)
expr_free(stmt->meter.key);
expr_free(stmt->meter.set);
stmt_free(stmt->meter.stmt);
- xfree(stmt->meter.name);
+ free_const(stmt->meter.name);
}
static const struct stmt_ops meter_stmt_ops = {
diff --git a/src/xt.c b/src/xt.c
index 3cb5f028b20e..48b2873b8c00 100644
--- a/src/xt.c
+++ b/src/xt.c
@@ -124,7 +124,7 @@ void xt_stmt_xlate(const struct stmt *stmt, struct output_ctx *octx)
void xt_stmt_destroy(struct stmt *stmt)
{
- xfree(stmt->xt.name);
+ free_const(stmt->xt.name);
xfree(stmt->xt.info);
}
--
2.41.0
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH nft v2 4/4] all: remove xfree() and use plain free()
2023-10-24 9:57 [PATCH nft v2 0/4] [RESENT] remove xfree() and add free_const()+nft_gmp_free() Thomas Haller
` (2 preceding siblings ...)
2023-10-24 9:57 ` [PATCH nft v2 3/4] all: add free_const() and use it instead of xfree() Thomas Haller
@ 2023-10-24 9:57 ` Thomas Haller
2023-11-06 13:35 ` [PATCH nft v2 0/4] [RESENT] remove xfree() and add free_const()+nft_gmp_free() Pablo Neira Ayuso
2023-11-09 16:05 ` Pablo Neira Ayuso
5 siblings, 0 replies; 10+ messages in thread
From: Thomas Haller @ 2023-10-24 9:57 UTC (permalink / raw)
To: NetFilter; +Cc: Thomas Haller
xmalloc() (and similar x-functions) are used for allocation. They wrap
malloc()/realloc() but will abort the program on ENOMEM.
The meaning of xmalloc() is that it wraps malloc() but aborts on
failure. I don't think x-functions should have the notion, that this
were potentially a different memory allocator that must be paired
with a particular xfree().
Even if the original intent was that the allocator is abstracted (and
possibly not backed by standard malloc()/free()), then that doesn't seem
a good idea. Nowadays libc allocators are pretty good, and we would need
a very special use cases to switch to something else. In other words,
it will never happen that xmalloc() is not backed by malloc().
Also there were a few places, where a xmalloc() was already "wrongly"
paired with free() (for example, iface_cache_release(), exit_cookie(),
nft_run_cmd_from_buffer()).
Or note how pid2name() returns an allocated string from fscanf(), which
needs to be freed with free() (and not xfree()). This requirement
bubbles up the callers portid2name() and name_by_portid(). This case was
actually handled correctly and the buffer was freed with free(). But it
shows that mixing different allocators is cumbersome to get right. Of
course, we don't actually have different allocators and whether to use
free() or xfree() makes no different. The point is that xfree() serves
no actual purpose except raising irrelevant questions about whether
x-functions are correctly paired with xfree().
Note that xfree() also used to accept const pointers. It is bad to
unconditionally for all deallocations. Instead prefer to use plain
free(). To free a const pointer use free_const() which obviously wraps
free, as indicated by the name.
Signed-off-by: Thomas Haller <thaller@redhat.com>
---
include/utils.h | 1 -
src/cache.c | 6 +++---
src/datatype.c | 4 ++--
src/erec.c | 6 +++---
src/evaluate.c | 4 ++--
src/expression.c | 2 +-
src/json.c | 2 +-
src/libnftables.c | 12 ++++++------
src/meta.c | 4 ++--
src/misspell.c | 2 +-
src/mnl.c | 4 ++--
src/netlink_linearize.c | 4 ++--
src/optimize.c | 10 +++++-----
src/parser_bison.y | 14 +++++++-------
src/rule.c | 32 ++++++++++++++++----------------
src/scanner.l | 2 +-
src/segtree.c | 4 ++--
src/statement.c | 2 +-
src/utils.c | 5 -----
src/xt.c | 8 ++++----
20 files changed, 61 insertions(+), 67 deletions(-)
diff --git a/include/utils.h b/include/utils.h
index 36a28f893667..e18fabec56ba 100644
--- a/include/utils.h
+++ b/include/utils.h
@@ -142,7 +142,6 @@ extern void __memory_allocation_error(const char *filename, uint32_t line) __nor
#define memory_allocation_error() \
__memory_allocation_error(__FILE__, __LINE__);
-extern void xfree(const void *ptr);
extern void *xmalloc(size_t size);
extern void *xmalloc_array(size_t nmemb, size_t size);
extern void *xrealloc(void *ptr, size_t size);
diff --git a/src/cache.c b/src/cache.c
index 4e89fe1338f3..b7f46c001d6e 100644
--- a/src/cache.c
+++ b/src/cache.c
@@ -126,9 +126,9 @@ void nft_cache_filter_fini(struct nft_cache_filter *filter)
struct nft_filter_obj *obj, *next;
list_for_each_entry_safe(obj, next, &filter->obj[i].head, list)
- xfree(obj);
+ free(obj);
}
- xfree(filter);
+ free(filter);
}
static void cache_filter_add(struct nft_cache_filter *filter,
@@ -1279,7 +1279,7 @@ void cache_init(struct cache *cache)
void cache_free(struct cache *cache)
{
- xfree(cache->ht);
+ free(cache->ht);
}
void cache_add(struct cache_item *item, struct cache *cache, uint32_t hash)
diff --git a/src/datatype.c b/src/datatype.c
index ca251138bba9..86d55a524269 100644
--- a/src/datatype.c
+++ b/src/datatype.c
@@ -1268,7 +1268,7 @@ void datatype_free(const struct datatype *ptr)
free_const(dtype->name);
free_const(dtype->desc);
- xfree(dtype);
+ free(dtype);
}
const struct datatype *concat_type_alloc(uint32_t type)
@@ -1515,7 +1515,7 @@ static void cgroupv2_type_print(const struct expr *expr,
else
nft_print(octx, "%" PRIu64, id);
- xfree(cgroup_path);
+ free(cgroup_path);
}
static struct error_record *cgroupv2_type_parse(struct parse_ctx *ctx,
diff --git a/src/erec.c b/src/erec.c
index cd9f62be8ba2..fe66abbe3ac2 100644
--- a/src/erec.c
+++ b/src/erec.c
@@ -43,8 +43,8 @@ void erec_add_location(struct error_record *erec, const struct location *loc)
void erec_destroy(struct error_record *erec)
{
- xfree(erec->msg);
- xfree(erec);
+ free(erec->msg);
+ free(erec);
}
__attribute__((format(printf, 3, 0)))
@@ -203,7 +203,7 @@ void erec_print(struct output_ctx *octx, const struct error_record *erec,
}
pbuf[end] = '\0';
fprintf(f, "%s", pbuf);
- xfree(pbuf);
+ free(pbuf);
}
fprintf(f, "\n");
}
diff --git a/src/evaluate.c b/src/evaluate.c
index be90a13f05a1..fe6271307b98 100644
--- a/src/evaluate.c
+++ b/src/evaluate.c
@@ -3240,7 +3240,7 @@ static int stmt_reject_gen_dependency(struct eval_ctx *ctx, struct stmt *stmt,
*/
list_add(&nstmt->list, &ctx->rule->stmts);
out:
- xfree(payload);
+ free(payload);
return ret;
}
@@ -5139,7 +5139,7 @@ static int ct_timeout_evaluate(struct eval_ctx *ctx, struct obj *obj)
ct->timeout[ts->timeout_index] = ts->timeout_value;
list_del(&ts->head);
free_const(ts->timeout_str);
- xfree(ts);
+ free(ts);
}
return 0;
diff --git a/src/expression.c b/src/expression.c
index 0b4a537af526..dde48b6aa002 100644
--- a/src/expression.c
+++ b/src/expression.c
@@ -94,7 +94,7 @@ void expr_free(struct expr *expr)
*/
if (expr->etype != EXPR_INVALID)
expr_destroy(expr);
- xfree(expr);
+ free(expr);
}
void expr_print(const struct expr *expr, struct output_ctx *octx)
diff --git a/src/json.c b/src/json.c
index 068c423addc7..23bd247221d3 100644
--- a/src/json.c
+++ b/src/json.c
@@ -83,7 +83,7 @@ static json_t *set_dtype_json(const struct expr *key)
json_array_append_new(root, jtok);
tok = strtok_r(NULL, " .", &tok_safe);
}
- xfree(namedup);
+ free(namedup);
return root;
}
diff --git a/src/libnftables.c b/src/libnftables.c
index 866b5c6be6c8..ec902009e002 100644
--- a/src/libnftables.c
+++ b/src/libnftables.c
@@ -158,7 +158,7 @@ void nft_ctx_clear_vars(struct nft_ctx *ctx)
free_const(ctx->vars[i].value);
}
ctx->num_vars = 0;
- xfree(ctx->vars);
+ free(ctx->vars);
}
EXPORT_SYMBOL(nft_ctx_add_include_path);
@@ -182,9 +182,9 @@ EXPORT_SYMBOL(nft_ctx_clear_include_paths);
void nft_ctx_clear_include_paths(struct nft_ctx *ctx)
{
while (ctx->num_include_paths)
- xfree(ctx->include_paths[--ctx->num_include_paths]);
+ free(ctx->include_paths[--ctx->num_include_paths]);
- xfree(ctx->include_paths);
+ free(ctx->include_paths);
ctx->include_paths = NULL;
}
@@ -343,9 +343,9 @@ void nft_ctx_free(struct nft_ctx *ctx)
nft_ctx_clear_vars(ctx);
nft_ctx_clear_include_paths(ctx);
scope_free(ctx->top_scope);
- xfree(ctx->state);
+ free(ctx->state);
nft_exit(ctx);
- xfree(ctx);
+ free(ctx);
}
EXPORT_SYMBOL(nft_ctx_set_output);
@@ -745,7 +745,7 @@ err:
if (indesc->name)
free_const(indesc->name);
- xfree(indesc);
+ free(indesc);
}
}
free_const(nft->vars_ctx.buf);
diff --git a/src/meta.c b/src/meta.c
index b578d5e24c06..daf815d9b49e 100644
--- a/src/meta.c
+++ b/src/meta.c
@@ -99,13 +99,13 @@ static struct error_record *tchandle_type_parse(struct parse_ctx *ctx,
handle = strtoull(sym->identifier, NULL, 0);
}
out:
- xfree(str);
+ free(str);
*res = constant_expr_alloc(&sym->location, sym->dtype,
BYTEORDER_HOST_ENDIAN,
sizeof(handle) * BITS_PER_BYTE, &handle);
return NULL;
err:
- xfree(str);
+ free(str);
return error(&sym->location, "Could not parse %s", sym->dtype->desc);
}
diff --git a/src/misspell.c b/src/misspell.c
index c1e58a0e8a8c..f5354fa8056b 100644
--- a/src/misspell.c
+++ b/src/misspell.c
@@ -72,7 +72,7 @@ static unsigned int string_distance(const char *a, const char *b)
ret = DISTANCE(len_a, len_b);
- xfree(distance);
+ free(distance);
return ret;
}
diff --git a/src/mnl.c b/src/mnl.c
index 0158924c2f50..9e4bfcd9a030 100644
--- a/src/mnl.c
+++ b/src/mnl.c
@@ -242,7 +242,7 @@ static void mnl_err_list_node_add(struct list_head *err_list, int error,
void mnl_err_list_free(struct mnl_err *err)
{
list_del(&err->head);
- xfree(err);
+ free(err);
}
static void mnl_set_sndbuffer(struct netlink_ctx *ctx)
@@ -2179,7 +2179,7 @@ static void basehook_free(struct basehook *b)
free_const(b->hookfn);
free_const(b->chain);
free_const(b->table);
- xfree(b);
+ free(b);
}
static void basehook_list_add_tail(struct basehook *b, struct list_head *head)
diff --git a/src/netlink_linearize.c b/src/netlink_linearize.c
index 0c62341112d8..df395bac5cf3 100644
--- a/src/netlink_linearize.c
+++ b/src/netlink_linearize.c
@@ -1743,9 +1743,9 @@ void netlink_linearize_fini(struct netlink_linearize_ctx *lctx)
for (i = 0; i < NFT_EXPR_LOC_HSIZE; i++) {
list_for_each_entry_safe(eloc, next, &lctx->expr_loc_htable[i], hlist)
- xfree(eloc);
+ free(eloc);
}
- xfree(lctx->expr_loc_htable);
+ free(lctx->expr_loc_htable);
}
void netlink_linearize_rule(struct netlink_ctx *ctx,
diff --git a/src/optimize.c b/src/optimize.c
index 9ae9283d7b6c..b90dd995b13e 100644
--- a/src/optimize.c
+++ b/src/optimize.c
@@ -1347,16 +1347,16 @@ static int chain_optimize(struct nft_ctx *nft, struct list_head *rules)
}
ret = 0;
for (i = 0; i < ctx->num_rules; i++)
- xfree(ctx->stmt_matrix[i]);
+ free(ctx->stmt_matrix[i]);
- xfree(ctx->stmt_matrix);
- xfree(merge);
+ free(ctx->stmt_matrix);
+ free(merge);
err:
for (i = 0; i < ctx->num_stmts; i++)
stmt_free(ctx->stmt[i]);
- xfree(ctx->rule);
- xfree(ctx);
+ free(ctx->rule);
+ free(ctx);
return ret;
}
diff --git a/src/parser_bison.y b/src/parser_bison.y
index 8f202bbee207..335a93deb23c 100644
--- a/src/parser_bison.y
+++ b/src/parser_bison.y
@@ -711,7 +711,7 @@ int nft_lex(void *, void *, void *);
%destructor { free_const($$); } extended_prio_name quota_unit basehook_device_name
%type <expr> dev_spec
-%destructor { xfree($$); } dev_spec
+%destructor { free($$); } dev_spec
%type <table> table_block_alloc table_block
%destructor { close_scope(state); table_free($$); } table_block_alloc
@@ -738,7 +738,7 @@ int nft_lex(void *, void *, void *);
%destructor { obj_free($$); } obj_block_alloc
%type <list> stmt_list stateful_stmt_list set_elem_stmt_list
-%destructor { stmt_list_free($$); xfree($$); } stmt_list stateful_stmt_list set_elem_stmt_list
+%destructor { stmt_list_free($$); free($$); } stmt_list stateful_stmt_list set_elem_stmt_list
%type <stmt> stmt match_stmt verdict_stmt set_elem_stmt
%destructor { stmt_free($$); } stmt match_stmt verdict_stmt set_elem_stmt
%type <stmt> counter_stmt counter_stmt_alloc stateful_stmt last_stmt
@@ -964,7 +964,7 @@ int nft_lex(void *, void *, void *);
%type <val> ct_l4protoname ct_obj_type ct_cmd_type
%type <list> timeout_states timeout_state
-%destructor { xfree($$); } timeout_states timeout_state
+%destructor { free($$); } timeout_states timeout_state
%type <val> xfrm_state_key xfrm_state_proto_key xfrm_dir xfrm_spnum
%type <expr> xfrm_expr
@@ -3020,7 +3020,7 @@ rule_alloc : stmt_list
list_for_each_entry(i, $1, list)
$$->num_stmts++;
list_splice_tail($1, &$$->stmts);
- xfree($1);
+ free($1);
}
;
@@ -4527,7 +4527,7 @@ set_elem_expr : set_elem_expr_alloc
{
$$ = $1;
list_splice_tail($3, &$$->stmt_list);
- xfree($3);
+ free($3);
}
;
@@ -4539,7 +4539,7 @@ set_elem_expr_alloc : set_elem_key_expr set_elem_stmt_list
{
$$ = set_elem_expr_alloc(&@1, $1);
list_splice_tail($2, &$$->stmt_list);
- xfree($2);
+ free($2);
}
| set_elem_key_expr
{
@@ -4851,7 +4851,7 @@ ct_timeout_config : PROTOCOL ct_l4protoname stmt_separator
ct = &$<obj>0->ct_timeout;
list_splice_tail($4, &ct->timeout_list);
- xfree($4);
+ free($4);
}
| L3PROTOCOL family_spec_explicit stmt_separator
{
diff --git a/src/rule.c b/src/rule.c
index b40a54d77759..172ba1f606e9 100644
--- a/src/rule.c
+++ b/src/rule.c
@@ -200,7 +200,7 @@ void set_free(struct set *set)
stmt_free(stmt);
expr_free(set->key);
expr_free(set->data);
- xfree(set);
+ free(set);
}
struct set *set_lookup_fuzzy(const char *set_name,
@@ -480,7 +480,7 @@ void rule_free(struct rule *rule)
stmt_list_free(&rule->stmts);
handle_free(&rule->handle);
free_const(rule->comment);
- xfree(rule);
+ free(rule);
}
void rule_print(const struct rule *rule, struct output_ctx *octx)
@@ -559,14 +559,14 @@ void scope_release(const struct scope *scope)
list_del(&sym->list);
free_const(sym->identifier);
expr_free(sym->expr);
- xfree(sym);
+ free(sym);
}
}
void scope_free(struct scope *scope)
{
scope_release(scope);
- xfree(scope);
+ free(scope);
}
void symbol_bind(struct scope *scope, const char *identifier, struct expr *expr)
@@ -599,7 +599,7 @@ static void symbol_put(struct symbol *sym)
if (--sym->refcnt == 0) {
free_const(sym->identifier);
expr_free(sym->expr);
- xfree(sym);
+ free(sym);
}
}
@@ -734,11 +734,11 @@ void chain_free(struct chain *chain)
expr_free(chain->dev_expr);
for (i = 0; i < chain->dev_array_len; i++)
free_const(chain->dev_array[i]);
- xfree(chain->dev_array);
+ free(chain->dev_array);
expr_free(chain->priority.expr);
expr_free(chain->policy);
free_const(chain->comment);
- xfree(chain);
+ free(chain);
}
struct chain *chain_binding_lookup(const struct table *table,
@@ -1181,7 +1181,7 @@ void table_free(struct table *table)
cache_free(&table->set_cache);
cache_free(&table->obj_cache);
cache_free(&table->ft_cache);
- xfree(table);
+ free(table);
}
struct table *table_get(struct table *table)
@@ -1330,7 +1330,7 @@ struct markup *markup_alloc(uint32_t format)
void markup_free(struct markup *m)
{
- xfree(m);
+ free(m);
}
struct monitor *monitor_alloc(uint32_t format, uint32_t type, const char *event)
@@ -1349,7 +1349,7 @@ struct monitor *monitor_alloc(uint32_t format, uint32_t type, const char *event)
void monitor_free(struct monitor *m)
{
free_const(m->event);
- xfree(m);
+ free(m);
}
void cmd_free(struct cmd *cmd)
@@ -1403,9 +1403,9 @@ void cmd_free(struct cmd *cmd)
BUG("invalid command object type %u\n", cmd->obj);
}
}
- xfree(cmd->attr);
+ free(cmd->attr);
free_const(cmd->arg);
- xfree(cmd);
+ free(cmd);
}
#include <netlink.h>
@@ -1650,10 +1650,10 @@ void obj_free(struct obj *obj)
list_for_each_entry_safe(ts, next, &obj->ct_timeout.timeout_list, head) {
list_del(&ts->head);
free_const(ts->timeout_str);
- xfree(ts);
+ free(ts);
}
}
- xfree(obj);
+ free(obj);
}
struct obj *obj_lookup_fuzzy(const char *obj_name,
@@ -2063,9 +2063,9 @@ void flowtable_free(struct flowtable *flowtable)
if (flowtable->dev_array != NULL) {
for (i = 0; i < flowtable->dev_array_len; i++)
free_const(flowtable->dev_array[i]);
- xfree(flowtable->dev_array);
+ free(flowtable->dev_array);
}
- xfree(flowtable);
+ free(flowtable);
}
static void flowtable_print_declaration(const struct flowtable *flowtable,
diff --git a/src/scanner.l b/src/scanner.l
index 93a31f27fe10..00a09485d420 100644
--- a/src/scanner.l
+++ b/src/scanner.l
@@ -1284,7 +1284,7 @@ void scanner_destroy(struct nft_ctx *nft)
struct parser_state *state = yyget_extra(nft->scanner);
input_descriptor_list_destroy(state);
- xfree(state->startcond_active);
+ free(state->startcond_active);
yylex_destroy(nft->scanner);
}
diff --git a/src/segtree.c b/src/segtree.c
index 28172b30c5b3..5e6f857f85b7 100644
--- a/src/segtree.c
+++ b/src/segtree.c
@@ -632,6 +632,6 @@ out:
if (catchall)
compound_expr_add(set, catchall);
- xfree(ranges);
- xfree(elements);
+ free(ranges);
+ free(elements);
}
diff --git a/src/statement.c b/src/statement.c
index 801784089f47..2f24a53d32e4 100644
--- a/src/statement.c
+++ b/src/statement.c
@@ -51,7 +51,7 @@ void stmt_free(struct stmt *stmt)
return;
if (stmt->ops->destroy)
stmt->ops->destroy(stmt);
- xfree(stmt);
+ free(stmt);
}
void stmt_list_free(struct list_head *list)
diff --git a/src/utils.c b/src/utils.c
index e6ad8b8b2af9..2aa1eb4ed6a5 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -24,11 +24,6 @@ void __noreturn __memory_allocation_error(const char *filename, uint32_t line)
exit(NFT_EXIT_NOMEM);
}
-void xfree(const void *ptr)
-{
- free((void *)ptr);
-}
-
void *xmalloc(size_t size)
{
void *ptr;
diff --git a/src/xt.c b/src/xt.c
index 48b2873b8c00..f7bee2161803 100644
--- a/src/xt.c
+++ b/src/xt.c
@@ -78,7 +78,7 @@ void xt_stmt_xlate(const struct stmt *stmt, struct output_ctx *octx)
rc = mt->xlate(xl, ¶ms);
}
- xfree(m);
+ free(m);
break;
case NFT_XT_WATCHER:
case NFT_XT_TARGET:
@@ -108,14 +108,14 @@ void xt_stmt_xlate(const struct stmt *stmt, struct output_ctx *octx)
rc = tg->xlate(xl, ¶ms);
}
- xfree(t);
+ free(t);
break;
}
if (rc == 1)
nft_print(octx, "%s", xt_xlate_get(xl));
xt_xlate_free(xl);
- xfree(entry);
+ free(entry);
#endif
if (!rc)
nft_print(octx, "xt %s \"%s\"",
@@ -125,7 +125,7 @@ void xt_stmt_xlate(const struct stmt *stmt, struct output_ctx *octx)
void xt_stmt_destroy(struct stmt *stmt)
{
free_const(stmt->xt.name);
- xfree(stmt->xt.info);
+ free(stmt->xt.info);
}
#ifdef HAVE_LIBXTABLES
--
2.41.0
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