[nft PATCH v4 2/7] libnftables: Keep list of commands in nft context

[Phil Sutter <phil@nwl.cc>]

To fix the pending issues with cache updates, the list of commands needs
to be accessible from within cache_update(). In theory, there is a path
via nft->state->cmds but that struct parser_state is used (and
initialized) by bison parser only so that does not work with JSON
parser.

Signed-off-by: Phil Sutter <phil@nwl.cc>
---
 include/nftables.h |  1 +
 src/libnftables.c  | 21 ++++++++++-----------
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/include/nftables.h b/include/nftables.h
index bb9bb2091716d..faacf26509104 100644
--- a/include/nftables.h
+++ b/include/nftables.h
@@ -102,6 +102,7 @@ struct nft_ctx {
 	struct parser_state	*state;
 	void			*scanner;
 	void			*json_root;
+	struct list_head	cmds;
 	FILE			*f[MAX_INCLUDE_DEPTH];
 };
 
diff --git a/src/libnftables.c b/src/libnftables.c
index 199dbc97b801c..f6ea668f6770a 100644
--- a/src/libnftables.c
+++ b/src/libnftables.c
@@ -143,6 +143,7 @@ struct nft_ctx *nft_ctx_new(uint32_t flags)
 	nft_ctx_add_include_path(ctx, DEFAULT_INCLUDE_PATH);
 	ctx->parser_max_errors	= 10;
 	init_list_head(&ctx->cache.list);
+	init_list_head(&ctx->cmds);
 	ctx->flags = flags;
 	ctx->output.output_fp = stdout;
 	ctx->output.error_fp = stderr;
@@ -342,7 +343,7 @@ static int nft_parse_bison_buffer(struct nft_ctx *nft, const char *buf,
 	struct cmd *cmd;
 	int ret;
 
-	parser_init(nft, nft->state, msgs, cmds);
+	parser_init(nft, nft->state, msgs, &nft->cmds);
 	nft->scanner = scanner_init(nft->state);
 	scanner_push_buffer(nft->scanner, &indesc_cmdline, buf);
 
@@ -381,7 +382,6 @@ int nft_run_cmd_from_buffer(struct nft_ctx *nft, const char *buf)
 {
 	struct cmd *cmd, *next;
 	LIST_HEAD(msgs);
-	LIST_HEAD(cmds);
 	char *nlbuf;
 	int rc = -EINVAL;
 
@@ -389,17 +389,17 @@ int nft_run_cmd_from_buffer(struct nft_ctx *nft, const char *buf)
 	sprintf(nlbuf, "%s\n", buf);
 
 	if (nft_output_json(&nft->output))
-		rc = nft_parse_json_buffer(nft, nlbuf, &msgs, &cmds);
+		rc = nft_parse_json_buffer(nft, nlbuf, &msgs, &nft->cmds);
 	if (rc == -EINVAL)
-		rc = nft_parse_bison_buffer(nft, nlbuf, &msgs, &cmds);
+		rc = nft_parse_bison_buffer(nft, nlbuf, &msgs, &nft->cmds);
 	if (rc)
 		goto err;
 
-	if (nft_netlink(nft, &cmds, &msgs, nft->nf_sock) != 0)
+	if (nft_netlink(nft, &nft->cmds, &msgs, nft->nf_sock) != 0)
 		rc = -1;
 err:
 	erec_print_list(&nft->output, &msgs, nft->debug_mask);
-	list_for_each_entry_safe(cmd, next, &cmds, list) {
+	list_for_each_entry_safe(cmd, next, &nft->cmds, list) {
 		list_del(&cmd->list);
 		cmd_free(cmd);
 	}
@@ -421,7 +421,6 @@ int nft_run_cmd_from_filename(struct nft_ctx *nft, const char *filename)
 {
 	struct cmd *cmd, *next;
 	LIST_HEAD(msgs);
-	LIST_HEAD(cmds);
 	int rc;
 
 	rc = cache_update(nft, CMD_INVALID, &msgs);
@@ -433,17 +432,17 @@ int nft_run_cmd_from_filename(struct nft_ctx *nft, const char *filename)
 
 	rc = -EINVAL;
 	if (nft_output_json(&nft->output))
-		rc = nft_parse_json_filename(nft, filename, &msgs, &cmds);
+		rc = nft_parse_json_filename(nft, filename, &msgs, &nft->cmds);
 	if (rc == -EINVAL)
-		rc = nft_parse_bison_filename(nft, filename, &msgs, &cmds);
+		rc = nft_parse_bison_filename(nft, filename, &msgs, &nft->cmds);
 	if (rc)
 		goto err;
 
-	if (nft_netlink(nft, &cmds, &msgs, nft->nf_sock) != 0)
+	if (nft_netlink(nft, &nft->cmds, &msgs, nft->nf_sock) != 0)
 		rc = -1;
 err:
 	erec_print_list(&nft->output, &msgs, nft->debug_mask);
-	list_for_each_entry_safe(cmd, next, &cmds, list) {
+	list_for_each_entry_safe(cmd, next, &nft->cmds, list) {
 		list_del(&cmd->list);
 		cmd_free(cmd);
 	}
-- 
2.21.0