iptables/SOURCES/0026-nft-Make-batch_add_chain-return-the-added-batch-obje.patch
2021-10-08 12:10:32 +00:00

168 lines
5.0 KiB
Diff

From d1b516014e4883f30ee2faf264dd89a6d7940e2c Mon Sep 17 00:00:00 2001
From: Phil Sutter <phil@nwl.cc>
Date: Sat, 3 Oct 2020 17:46:09 +0200
Subject: [PATCH] nft: Make batch_add_chain() return the added batch object
Do this so in a later patch the 'skip' field can be adjusted.
While being at it, simplify a few callers and eliminate the need for a
'ret' variable.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Reviewed-by: Florian Westphal <fw@strlen.de>
(cherry picked from commit 0d77e64e8d9b8a3984b01a4951524dc40f61f4b6)
Conflicts:
iptables/nft.c
-> Upstream changed good/bad return codes of nft_chain_restore()
function.
Signed-off-by: Phil Sutter <psutter@redhat.com>
---
iptables/nft.c | 35 +++++++++++++++++------------------
1 file changed, 17 insertions(+), 18 deletions(-)
diff --git a/iptables/nft.c b/iptables/nft.c
index e95e99f1d8d71..0efd18d57320f 100644
--- a/iptables/nft.c
+++ b/iptables/nft.c
@@ -398,10 +398,11 @@ batch_set_add(struct nft_handle *h, enum obj_update_type type,
return batch_add(h, type, s);
}
-static int batch_chain_add(struct nft_handle *h, enum obj_update_type type,
+static struct obj_update *
+batch_chain_add(struct nft_handle *h, enum obj_update_type type,
struct nftnl_chain *c)
{
- return batch_add(h, type, c) ? 0 : -1;
+ return batch_add(h, type, c);
}
static struct obj_update *
@@ -910,7 +911,6 @@ int nft_chain_set(struct nft_handle *h, const char *table,
const struct xt_counters *counters)
{
struct nftnl_chain *c = NULL;
- int ret;
nft_fn = nft_chain_set;
@@ -924,10 +924,11 @@ int nft_chain_set(struct nft_handle *h, const char *table,
if (c == NULL)
return 0;
- ret = batch_chain_add(h, NFT_COMPAT_CHAIN_UPDATE, c);
+ if (!batch_chain_add(h, NFT_COMPAT_CHAIN_UPDATE, c))
+ return 0;
/* the core expects 1 for success and 0 for error */
- return ret == 0 ? 1 : 0;
+ return 1;
}
static int __add_match(struct nftnl_expr *e, struct xt_entry_match *m)
@@ -1734,7 +1735,6 @@ int nft_chain_user_add(struct nft_handle *h, const char *chain, const char *tabl
{
struct nftnl_chain_list *list;
struct nftnl_chain *c;
- int ret;
nft_fn = nft_chain_user_add;
@@ -1754,14 +1754,15 @@ int nft_chain_user_add(struct nft_handle *h, const char *chain, const char *tabl
if (h->family == NFPROTO_BRIDGE)
nftnl_chain_set_u32(c, NFTNL_CHAIN_POLICY, NF_ACCEPT);
- ret = batch_chain_add(h, NFT_COMPAT_CHAIN_USER_ADD, c);
+ if (!batch_chain_add(h, NFT_COMPAT_CHAIN_USER_ADD, c))
+ return 0;
list = nft_chain_list_get(h, table, chain);
if (list)
nftnl_chain_list_add(c, list);
/* the core expects 1 for success and 0 for error */
- return ret == 0 ? 1 : 0;
+ return 1;
}
int nft_chain_restore(struct nft_handle *h, const char *chain, const char *table)
@@ -1769,7 +1770,6 @@ int nft_chain_restore(struct nft_handle *h, const char *chain, const char *table
struct nftnl_chain_list *list;
struct nftnl_chain *c;
bool created = false;
- int ret;
c = nft_chain_find(h, table, chain);
if (c) {
@@ -1794,13 +1794,14 @@ int nft_chain_restore(struct nft_handle *h, const char *chain, const char *table
if (!created)
return 0;
- ret = batch_chain_add(h, NFT_COMPAT_CHAIN_USER_ADD, c);
+ if (!batch_chain_add(h, NFT_COMPAT_CHAIN_USER_ADD, c))
+ return -1;
list = nft_chain_list_get(h, table, chain);
if (list)
nftnl_chain_list_add(c, list);
- return ret;
+ return 0;
}
/* From linux/netlink.h */
@@ -1818,7 +1819,6 @@ static int __nft_chain_user_del(struct nftnl_chain *c, void *data)
{
struct chain_user_del_data *d = data;
struct nft_handle *h = d->handle;
- int ret;
/* don't delete built-in chain */
if (nft_chain_builtin(c))
@@ -1834,8 +1834,7 @@ static int __nft_chain_user_del(struct nftnl_chain *c, void *data)
/* XXX This triggers a fast lookup from the kernel. */
nftnl_chain_unset(c, NFTNL_CHAIN_HANDLE);
- ret = batch_chain_add(h, NFT_COMPAT_CHAIN_USER_DEL, c);
- if (ret)
+ if (!batch_chain_add(h, NFT_COMPAT_CHAIN_USER_DEL, c))
return -1;
nftnl_chain_list_del(c);
@@ -1910,7 +1909,6 @@ int nft_chain_user_rename(struct nft_handle *h,const char *chain,
{
struct nftnl_chain *c;
uint64_t handle;
- int ret;
nft_fn = nft_chain_user_rename;
@@ -1941,10 +1939,11 @@ int nft_chain_user_rename(struct nft_handle *h,const char *chain,
nftnl_chain_set_str(c, NFTNL_CHAIN_NAME, newname);
nftnl_chain_set_u64(c, NFTNL_CHAIN_HANDLE, handle);
- ret = batch_chain_add(h, NFT_COMPAT_CHAIN_RENAME, c);
+ if (!batch_chain_add(h, NFT_COMPAT_CHAIN_RENAME, c))
+ return 0;
/* the core expects 1 for success and 0 for error */
- return ret == 0 ? 1 : 0;
+ return 1;
}
bool nft_table_find(struct nft_handle *h, const char *tablename)
@@ -3217,7 +3216,7 @@ static int __nft_chain_zero_counters(struct nftnl_chain *c, void *data)
nftnl_chain_set_u64(c, NFTNL_CHAIN_PACKETS, 0);
nftnl_chain_set_u64(c, NFTNL_CHAIN_BYTES, 0);
nftnl_chain_unset(c, NFTNL_CHAIN_HANDLE);
- if (batch_chain_add(h, NFT_COMPAT_CHAIN_ZERO, c))
+ if (!batch_chain_add(h, NFT_COMPAT_CHAIN_ZERO, c))
return -1;
}
--
2.28.0