libnftnl: add patch to avoid symbol conflict
When ELF binaries and shared libraries are used, the internal functions of libnftnl such as xfree() are not visible to the outside world (their visibility is 'hidden'). Therefore, the fact that other programs (especially nftables) may have symbols with the same name does not cause any problem. However, when doing static linking on a non-ELF platform (such as Blackfin, which uses the FLAT binary format), there is no way of encoding this visibility. Therefore, the xfree() symbols of libnftnl becomes visible to the outside world, causing a conflict with the xfree() symbol defined by nftables. To solve this, this patch renames the libnftnl xfree() function to libnftnl_xfree(). This commit fixes a problem seen after building nftables statically on Blackfin. This problem was seen after the previous patch fixing the autobuilder failure: http://autobuild.buildroot.org/results/98b/98b707ffdeeb1cda94b7c1019ef29cf5fd7db8bf/ Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Thomas Petazzoni
Peter Korsgaard
parent
34e3857d98
commit
06a603b8d5
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@ -0,0 +1,596 @@
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Rename xfree() to libnftnl_xfree() to avoid symbol naming conflict
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When ELF binaries and shared libraries are used, the internal
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functions of libnftnl such as xfree() are not visible to the outside
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world (their visibility is 'hidden'). Therefore, the fact that other
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programs (especially nftables) may have symbols with the same name
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does not cause any problem.
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However, when doing static linking on a non-ELF platform (such as
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Blackfin, which uses the FLAT binary format), there is no way of
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encoding this visibility. Therefore, the xfree() symbols of libnftnl
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becomes visible to the outside world, causing a conflict with the
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xfree() symbol defined by nftables.
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To solve this, this patch renames the libnftnl xfree() function to
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libnftnl_xfree().
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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Index: b/src/chain.c
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===================================================================
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--- a/src/chain.c
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+++ b/src/chain.c
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@@ -88,11 +88,11 @@
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void nft_chain_free(struct nft_chain *c)
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{
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if (c->table != NULL)
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- xfree(c->table);
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+ nftnl_xfree(c->table);
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if (c->type != NULL)
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- xfree(c->type);
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+ nftnl_xfree(c->type);
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- xfree(c);
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+ nftnl_xfree(c);
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}
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EXPORT_SYMBOL(nft_chain_free);
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@@ -110,7 +110,7 @@
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switch (attr) {
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case NFT_CHAIN_ATTR_TABLE:
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if (c->table) {
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- xfree(c->table);
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+ nftnl_xfree(c->table);
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c->table = NULL;
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}
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break;
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@@ -119,7 +119,7 @@
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return;
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case NFT_CHAIN_ATTR_TYPE:
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if (c->type) {
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- xfree(c->type);
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+ nftnl_xfree(c->type);
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c->type = NULL;
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}
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break;
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@@ -164,7 +164,7 @@
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break;
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case NFT_CHAIN_ATTR_TABLE:
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if (c->table)
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- xfree(c->table);
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+ nftnl_xfree(c->table);
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c->table = strdup(data);
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break;
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@@ -194,7 +194,7 @@
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break;
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case NFT_CHAIN_ATTR_TYPE:
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if (c->type)
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- xfree(c->type);
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+ nftnl_xfree(c->type);
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c->type = strdup(data);
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break;
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@@ -714,7 +714,7 @@
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return -1;
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if (c->table)
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- xfree(c->table);
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+ nftnl_xfree(c->table);
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c->table = strdup(table);
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c->flags |= (1 << NFT_CHAIN_ATTR_TABLE);
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@@ -743,7 +743,7 @@
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return -1;
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if (c->type)
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- xfree(c->type);
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+ nftnl_xfree(c->type);
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c->type = strdup(type);
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c->flags |= (1 << NFT_CHAIN_ATTR_TYPE);
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@@ -991,7 +991,7 @@
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list_del(&r->head);
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nft_chain_free(r);
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}
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- xfree(list);
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+ nftnl_xfree(list);
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}
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EXPORT_SYMBOL(nft_chain_list_free);
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@@ -1070,6 +1070,6 @@
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void nft_chain_list_iter_destroy(struct nft_chain_list_iter *iter)
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{
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- xfree(iter);
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+ nftnl_xfree(iter);
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}
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EXPORT_SYMBOL(nft_chain_list_iter_destroy);
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Index: b/src/common.c
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===================================================================
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--- a/src/common.c
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+++ b/src/common.c
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@@ -45,7 +45,7 @@
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void nft_parse_err_free(struct nft_parse_err *err)
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{
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- xfree(err);
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+ nftnl_xfree(err);
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}
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EXPORT_SYMBOL(nft_parse_err_free);
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Index: b/src/expr.c
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===================================================================
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--- a/src/expr.c
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+++ b/src/expr.c
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@@ -52,7 +52,7 @@
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if (expr->ops->free)
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expr->ops->free(expr);
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- xfree(expr);
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+ nftnl_xfree(expr);
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}
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EXPORT_SYMBOL(nft_rule_expr_free);
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Index: b/src/expr/data_reg.c
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===================================================================
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--- a/src/expr/data_reg.c
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+++ b/src/expr/data_reg.c
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@@ -130,7 +130,7 @@
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NFT_XML_OPT, err);
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if (chain != NULL) {
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if (reg->chain)
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- xfree(reg->chain);
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+ nftnl_xfree(reg->chain);
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reg->chain = strdup(chain);
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}
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Index: b/src/expr/immediate.c
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===================================================================
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--- a/src/expr/immediate.c
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+++ b/src/expr/immediate.c
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@@ -46,7 +46,7 @@
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break;
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case NFT_EXPR_IMM_CHAIN:
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if (imm->data.chain)
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- xfree(imm->data.chain);
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+ nftnl_xfree(imm->data.chain);
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imm->data.chain = strdup(data);
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break;
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Index: b/src/expr/log.c
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===================================================================
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--- a/src/expr/log.c
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+++ b/src/expr/log.c
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@@ -37,7 +37,7 @@
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switch(type) {
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case NFT_EXPR_LOG_PREFIX:
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if (log->prefix)
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- xfree(log->prefix);
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+ nftnl_xfree(log->prefix);
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log->prefix = strdup(data);
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break;
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@@ -139,7 +139,7 @@
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if (tb[NFTA_LOG_PREFIX]) {
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if (log->prefix)
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- xfree(log->prefix);
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+ nftnl_xfree(log->prefix);
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log->prefix = strdup(mnl_attr_get_str(tb[NFTA_LOG_PREFIX]));
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e->flags |= (1 << NFT_EXPR_LOG_PREFIX);
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@@ -320,7 +320,7 @@
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{
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struct nft_expr_log *log = nft_expr_data(e);
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- xfree(log->prefix);
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+ nftnl_xfree(log->prefix);
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}
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struct expr_ops expr_ops_log = {
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Index: b/src/expr/match.c
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===================================================================
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--- a/src/expr/match.c
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+++ b/src/expr/match.c
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@@ -50,7 +50,7 @@
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break;
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case NFT_EXPR_MT_INFO:
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if (mt->data)
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- xfree(mt->data);
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+ nftnl_xfree(mt->data);
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mt->data = data;
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mt->data_len = data_len;
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@@ -153,7 +153,7 @@
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void *match_data;
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if (match->data)
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- xfree(match->data);
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+ nftnl_xfree(match->data);
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match_data = calloc(1, len);
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if (match_data == NULL)
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@@ -261,7 +261,7 @@
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{
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struct nft_expr_match *match = nft_expr_data(e);
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- xfree(match->data);
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+ nftnl_xfree(match->data);
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}
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struct expr_ops expr_ops_match = {
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Index: b/src/expr/target.c
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===================================================================
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--- a/src/expr/target.c
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+++ b/src/expr/target.c
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@@ -50,7 +50,7 @@
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break;
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case NFT_EXPR_TG_INFO:
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if (tg->data)
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- xfree(tg->data);
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+ nftnl_xfree(tg->data);
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tg->data = data;
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tg->data_len = data_len;
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@@ -153,7 +153,7 @@
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void *target_data;
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if (target->data)
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- xfree(target->data);
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+ nftnl_xfree(target->data);
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target_data = calloc(1, len);
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if (target_data == NULL)
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@@ -262,7 +262,7 @@
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{
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struct nft_expr_target *target = nft_expr_data(e);
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- xfree(target->data);
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+ nftnl_xfree(target->data);
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}
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struct expr_ops expr_ops_target = {
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Index: b/src/internal.h
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===================================================================
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--- a/src/internal.h
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+++ b/src/internal.h
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@@ -143,7 +143,7 @@
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uint32_t format, uint32_t flags);
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int nft_event_footer_fprintf(FILE *fp, uint32_t format, uint32_t flags);
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-void xfree(const void *ptr);
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+void nftnl_xfree(const void *ptr);
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struct expr_ops;
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Index: b/src/mxml.c
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===================================================================
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--- a/src/mxml.c
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+++ b/src/mxml.c
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@@ -82,7 +82,7 @@
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goto err_expr;
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tree = mxmlLoadString(NULL, xml_text, MXML_OPAQUE_CALLBACK);
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- xfree(xml_text);
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+ nftnl_xfree(xml_text);
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if (tree == NULL)
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goto err_expr;
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Index: b/src/rule.c
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===================================================================
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--- a/src/rule.c
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+++ b/src/rule.c
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@@ -74,11 +74,11 @@
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nft_rule_expr_free(e);
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if (r->table != NULL)
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- xfree(r->table);
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+ nftnl_xfree(r->table);
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if (r->chain != NULL)
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- xfree(r->chain);
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+ nftnl_xfree(r->chain);
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- xfree(r);
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+ nftnl_xfree(r);
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}
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EXPORT_SYMBOL(nft_rule_free);
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@@ -96,13 +96,13 @@
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switch (attr) {
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case NFT_RULE_ATTR_TABLE:
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if (r->table) {
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- xfree(r->table);
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+ nftnl_xfree(r->table);
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r->table = NULL;
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}
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break;
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case NFT_RULE_ATTR_CHAIN:
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if (r->chain) {
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- xfree(r->chain);
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+ nftnl_xfree(r->chain);
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r->chain = NULL;
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}
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break;
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@@ -138,13 +138,13 @@
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switch(attr) {
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case NFT_RULE_ATTR_TABLE:
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if (r->table)
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- xfree(r->table);
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+ nftnl_xfree(r->table);
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r->table = strdup(data);
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break;
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case NFT_RULE_ATTR_CHAIN:
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if (r->chain)
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- xfree(r->chain);
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+ nftnl_xfree(r->chain);
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r->chain = strdup(data);
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break;
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@@ -408,7 +408,7 @@
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if (tb[NFTA_EXPR_DATA]) {
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if (expr->ops->parse(expr, tb[NFTA_EXPR_DATA]) < 0) {
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- xfree(expr);
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+ nftnl_xfree(expr);
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return -1;
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}
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}
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@@ -506,7 +506,7 @@
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mnl_attr_get_payload(tb[NFTA_RULE_USERDATA]);
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if (r->user.data)
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- xfree(r->user.data);
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+ nftnl_xfree(r->user.data);
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r->user.len = mnl_attr_get_payload_len(tb[NFTA_RULE_USERDATA]);
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@@ -1074,7 +1074,7 @@
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void nft_rule_expr_iter_destroy(struct nft_rule_expr_iter *iter)
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{
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- xfree(iter);
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+ nftnl_xfree(iter);
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}
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EXPORT_SYMBOL(nft_rule_expr_iter_destroy);
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@@ -1104,7 +1104,7 @@
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list_del(&r->head);
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nft_rule_free(r);
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}
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- xfree(list);
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+ nftnl_xfree(list);
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}
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EXPORT_SYMBOL(nft_rule_list_free);
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@@ -1189,6 +1189,6 @@
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void nft_rule_list_iter_destroy(struct nft_rule_list_iter *iter)
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{
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- xfree(iter);
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+ nftnl_xfree(iter);
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}
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EXPORT_SYMBOL(nft_rule_list_iter_destroy);
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Index: b/src/ruleset.c
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===================================================================
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--- a/src/ruleset.c
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+++ b/src/ruleset.c
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@@ -48,7 +48,7 @@
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nft_set_list_free(r->set_list);
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if (r->flags & (1 << NFT_RULESET_ATTR_RULELIST))
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nft_rule_list_free(r->rule_list);
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- xfree(r);
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+ nftnl_xfree(r);
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}
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EXPORT_SYMBOL(nft_ruleset_free);
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Index: b/src/set.c
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===================================================================
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--- a/src/set.c
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+++ b/src/set.c
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@@ -46,15 +46,15 @@
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struct nft_set_elem *elem, *tmp;
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if (s->table != NULL)
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- xfree(s->table);
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+ nftnl_xfree(s->table);
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if (s->name != NULL)
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- xfree(s->name);
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+ nftnl_xfree(s->name);
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list_for_each_entry_safe(elem, tmp, &s->element_list, head) {
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list_del(&elem->head);
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nft_set_elem_free(elem);
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}
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- xfree(s);
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+ nftnl_xfree(s);
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}
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EXPORT_SYMBOL(nft_set_free);
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@@ -70,14 +70,14 @@
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case NFT_SET_ATTR_TABLE:
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if (s->flags & (1 << NFT_SET_ATTR_TABLE))
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if (s->table) {
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- xfree(s->table);
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+ nftnl_xfree(s->table);
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s->table = NULL;
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}
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break;
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case NFT_SET_ATTR_NAME:
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if (s->flags & (1 << NFT_SET_ATTR_NAME))
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if (s->name) {
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- xfree(s->name);
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+ nftnl_xfree(s->name);
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s->name = NULL;
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}
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break;
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@@ -117,13 +117,13 @@
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switch(attr) {
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case NFT_SET_ATTR_TABLE:
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if (s->table)
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- xfree(s->table);
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+ nftnl_xfree(s->table);
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s->table = strdup(data);
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break;
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case NFT_SET_ATTR_NAME:
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if (s->name)
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- xfree(s->name);
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+ nftnl_xfree(s->name);
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|
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s->name = strdup(data);
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break;
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@@ -827,7 +827,7 @@
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list_del(&s->head);
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nft_set_free(s);
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}
|
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- xfree(list);
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+ nftnl_xfree(list);
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}
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EXPORT_SYMBOL(nft_set_list_free);
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|
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@@ -911,6 +911,6 @@
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|
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void nft_set_list_iter_destroy(struct nft_set_list_iter *iter)
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{
|
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- xfree(iter);
|
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+ nftnl_xfree(iter);
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}
|
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EXPORT_SYMBOL(nft_set_list_iter_destroy);
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Index: b/src/set_elem.c
|
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===================================================================
|
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--- a/src/set_elem.c
|
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+++ b/src/set_elem.c
|
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@@ -44,11 +44,11 @@
|
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{
|
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if (s->flags & (1 << NFT_SET_ELEM_ATTR_CHAIN)) {
|
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if (s->data.chain) {
|
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- xfree(s->data.chain);
|
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+ nftnl_xfree(s->data.chain);
|
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s->data.chain = NULL;
|
||||
}
|
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}
|
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- xfree(s);
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+ nftnl_xfree(s);
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}
|
||||
EXPORT_SYMBOL(nft_set_elem_free);
|
||||
|
||||
@@ -64,7 +64,7 @@
|
||||
case NFT_SET_ELEM_ATTR_CHAIN:
|
||||
if (s->flags & (1 << NFT_SET_ELEM_ATTR_CHAIN)) {
|
||||
if (s->data.chain) {
|
||||
- xfree(s->data.chain);
|
||||
+ nftnl_xfree(s->data.chain);
|
||||
s->data.chain = NULL;
|
||||
}
|
||||
}
|
||||
@@ -98,7 +98,7 @@
|
||||
break;
|
||||
case NFT_SET_ELEM_ATTR_CHAIN: /* NFTA_SET_ELEM_DATA */
|
||||
if (s->data.chain)
|
||||
- xfree(s->data.chain);
|
||||
+ nftnl_xfree(s->data.chain);
|
||||
|
||||
s->data.chain = strdup(data);
|
||||
break;
|
||||
@@ -290,7 +290,7 @@
|
||||
}
|
||||
}
|
||||
if (ret < 0) {
|
||||
- xfree(e);
|
||||
+ nftnl_xfree(e);
|
||||
return -1;
|
||||
}
|
||||
|
||||
@@ -708,6 +708,6 @@
|
||||
|
||||
void nft_set_elems_iter_destroy(struct nft_set_elems_iter *iter)
|
||||
{
|
||||
- xfree(iter);
|
||||
+ nftnl_xfree(iter);
|
||||
}
|
||||
EXPORT_SYMBOL(nft_set_elems_iter_destroy);
|
||||
Index: b/src/table.c
|
||||
===================================================================
|
||||
--- a/src/table.c
|
||||
+++ b/src/table.c
|
||||
@@ -44,9 +44,9 @@
|
||||
void nft_table_free(struct nft_table *t)
|
||||
{
|
||||
if (t->flags & (1 << NFT_TABLE_ATTR_NAME))
|
||||
- xfree(t->name);
|
||||
+ nftnl_xfree(t->name);
|
||||
|
||||
- xfree(t);
|
||||
+ nftnl_xfree(t);
|
||||
}
|
||||
EXPORT_SYMBOL(nft_table_free);
|
||||
|
||||
@@ -64,7 +64,7 @@
|
||||
switch (attr) {
|
||||
case NFT_TABLE_ATTR_NAME:
|
||||
if (t->name) {
|
||||
- xfree(t->name);
|
||||
+ nftnl_xfree(t->name);
|
||||
t->name = NULL;
|
||||
}
|
||||
break;
|
||||
@@ -95,7 +95,7 @@
|
||||
switch (attr) {
|
||||
case NFT_TABLE_ATTR_NAME:
|
||||
if (t->name)
|
||||
- xfree(t->name);
|
||||
+ nftnl_xfree(t->name);
|
||||
|
||||
t->name = strdup(data);
|
||||
break;
|
||||
@@ -270,7 +270,7 @@
|
||||
return -1;
|
||||
|
||||
if (t->name)
|
||||
- xfree(t->name);
|
||||
+ nftnl_xfree(t->name);
|
||||
|
||||
t->name = strdup(name);
|
||||
t->flags |= (1 << NFT_TABLE_ATTR_NAME);
|
||||
@@ -507,7 +507,7 @@
|
||||
list_del(&r->head);
|
||||
nft_table_free(r);
|
||||
}
|
||||
- xfree(list);
|
||||
+ nftnl_xfree(list);
|
||||
}
|
||||
EXPORT_SYMBOL(nft_table_list_free);
|
||||
|
||||
@@ -586,6 +586,6 @@
|
||||
|
||||
void nft_table_list_iter_destroy(struct nft_table_list_iter *iter)
|
||||
{
|
||||
- xfree(iter);
|
||||
+ nftnl_xfree(iter);
|
||||
}
|
||||
EXPORT_SYMBOL(nft_table_list_iter_destroy);
|
||||
Index: b/src/utils.c
|
||||
===================================================================
|
||||
--- a/src/utils.c
|
||||
+++ b/src/utils.c
|
||||
@@ -180,7 +180,7 @@
|
||||
return -1;
|
||||
}
|
||||
|
||||
-void xfree(const void *ptr)
|
||||
+void nftnl_xfree(const void *ptr)
|
||||
{
|
||||
free((void *)ptr);
|
||||
}
|
||||
@@ -214,7 +214,7 @@
|
||||
|
||||
out:
|
||||
if (buf != _buf)
|
||||
- xfree(buf);
|
||||
+ nftnl_xfree(buf);
|
||||
|
||||
return ret;
|
||||
}
|
||||
Loading…
Reference in New Issue