diff mbox series

[v3,1/7] cmdline: make implementation logically opaque

Message ID 20200928215052.23627-2-dmitry.kozliuk@gmail.com (mailing list archive)
State Accepted, archived
Delegated to: Thomas Monjalon
Headers show
Series cmdline: support Windows | expand

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Dmitry Kozlyuk Sept. 28, 2020, 9:50 p.m. UTC
struct cmdline exposes platform-specific members it contains, most
notably struct termios that is only available on Unix. While ABI
considerations prevent from hinding the definition on already supported
platforms, struct cmdline is considered logically opaque from now on.
Add a deprecation notice targeted at 20.11.

* Remove tests checking struct cmdline content as meaningless.

* Fix missing cmdline_free() in unit test.

* Add cmdline_get_rdline() to access history buffer indirectly.
  The new function is currently used only in tests.

Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
Suggested-by: Olivier Matz <olivier.matz@6wind.com>
---
 app/test-cmdline/commands.c                |  8 +++-
 app/test/test_cmdline_lib.c                | 44 +++++++++-------------
 doc/guides/rel_notes/deprecation.rst       |  4 ++
 lib/librte_cmdline/cmdline.c               |  9 +++--
 lib/librte_cmdline/cmdline.h               | 18 ++++++++-
 lib/librte_cmdline/cmdline_parse.c         |  3 --
 lib/librte_cmdline/cmdline_socket.c        |  5 +--
 lib/librte_cmdline/rte_cmdline_version.map |  8 ++++
 8 files changed, 60 insertions(+), 39 deletions(-)

Comments

Kinsella, Ray Sept. 30, 2020, 8:12 a.m. UTC | #1
On 28/09/2020 22:50, Dmitry Kozlyuk wrote:
> struct cmdline exposes platform-specific members it contains, most
> notably struct termios that is only available on Unix. While ABI
> considerations prevent from hinding the definition on already supported
> platforms, struct cmdline is considered logically opaque from now on.
> Add a deprecation notice targeted at 20.11.
> 
> * Remove tests checking struct cmdline content as meaningless.
> 
> * Fix missing cmdline_free() in unit test.
> 
> * Add cmdline_get_rdline() to access history buffer indirectly.
>   The new function is currently used only in tests.
> 
> Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
> Suggested-by: Olivier Matz <olivier.matz@6wind.com>
> ---
>  app/test-cmdline/commands.c                |  8 +++-
>  app/test/test_cmdline_lib.c                | 44 +++++++++-------------
>  doc/guides/rel_notes/deprecation.rst       |  4 ++
>  lib/librte_cmdline/cmdline.c               |  9 +++--
>  lib/librte_cmdline/cmdline.h               | 18 ++++++++-
>  lib/librte_cmdline/cmdline_parse.c         |  3 --
>  lib/librte_cmdline/cmdline_socket.c        |  5 +--
>  lib/librte_cmdline/rte_cmdline_version.map |  8 ++++
>  8 files changed, 60 insertions(+), 39 deletions(-)

Acked-by: Ray Kinsella <mdr@ashroe.eu>
diff mbox series

Patch

diff --git a/app/test-cmdline/commands.c b/app/test-cmdline/commands.c
index d67c0ca6a..ff7ac973e 100644
--- a/app/test-cmdline/commands.c
+++ b/app/test-cmdline/commands.c
@@ -294,8 +294,10 @@  cmd_get_history_bufsize_parsed(__rte_unused void *parsed_result,
 		struct cmdline *cl,
 		__rte_unused void *data)
 {
+	struct rdline *rdl = cmdline_get_rdline(cl);
+
 	cmdline_printf(cl, "History buffer size: %zu\n",
-			sizeof(cl->rdl.history_buf));
+			sizeof(rdl->history_buf));
 }
 
 cmdline_parse_token_string_t cmd_get_history_bufsize_tok =
@@ -326,7 +328,9 @@  cmd_clear_history_parsed(__rte_unused void *parsed_result,
 		struct cmdline *cl,
 		__rte_unused void *data)
 {
-	rdline_clear_history(&cl->rdl);
+	struct rdline *rdl = cmdline_get_rdline(cl);
+
+	rdline_clear_history(rdl);
 }
 
 cmdline_parse_token_string_t cmd_clear_history_tok =
diff --git a/app/test/test_cmdline_lib.c b/app/test/test_cmdline_lib.c
index dec465da5..bd72df0da 100644
--- a/app/test/test_cmdline_lib.c
+++ b/app/test/test_cmdline_lib.c
@@ -46,22 +46,29 @@  complete_buffer(__rte_unused struct rdline *rdl,
 static int
 test_cmdline_parse_fns(void)
 {
-	struct cmdline cl;
+	struct cmdline *cl;
+	cmdline_parse_ctx_t ctx;
 	int i = 0;
 	char dst[CMDLINE_TEST_BUFSIZE];
 
+	cl = cmdline_new(&ctx, "prompt", -1, -1);
+	if (cl == NULL) {
+		printf("Error: cannot create cmdline to test parse fns!\n");
+		return -1;
+	}
+
 	if (cmdline_parse(NULL, "buffer") >= 0)
 		goto error;
-	if (cmdline_parse(&cl, NULL) >= 0)
+	if (cmdline_parse(cl, NULL) >= 0)
 		goto error;
 
 	if (cmdline_complete(NULL, "buffer", &i, dst, sizeof(dst)) >= 0)
 		goto error;
-	if (cmdline_complete(&cl, NULL, &i, dst, sizeof(dst)) >= 0)
+	if (cmdline_complete(cl, NULL, &i, dst, sizeof(dst)) >= 0)
 		goto error;
-	if (cmdline_complete(&cl, "buffer", NULL, dst, sizeof(dst)) >= 0)
+	if (cmdline_complete(cl, "buffer", NULL, dst, sizeof(dst)) >= 0)
 		goto error;
-	if (cmdline_complete(&cl, "buffer", &i, NULL, sizeof(dst)) >= 0)
+	if (cmdline_complete(cl, "buffer", &i, NULL, sizeof(dst)) >= 0)
 		goto error;
 
 	return 0;
@@ -166,11 +173,11 @@  static int
 test_cmdline_fns(void)
 {
 	cmdline_parse_ctx_t ctx;
-	struct cmdline cl, *tmp;
+	struct cmdline *cl;
 
 	memset(&ctx, 0, sizeof(ctx));
-	tmp = cmdline_new(&ctx, "test", -1, -1);
-	if (tmp == NULL)
+	cl = cmdline_new(&ctx, "test", -1, -1);
+	if (cl == NULL)
 		goto error;
 
 	if (cmdline_new(NULL, "prompt", 0, 0) != NULL)
@@ -179,7 +186,7 @@  test_cmdline_fns(void)
 		goto error;
 	if (cmdline_in(NULL, "buffer", CMDLINE_TEST_BUFSIZE) >= 0)
 		goto error;
-	if (cmdline_in(&cl, NULL, CMDLINE_TEST_BUFSIZE) >= 0)
+	if (cmdline_in(cl, NULL, CMDLINE_TEST_BUFSIZE) >= 0)
 		goto error;
 	if (cmdline_write_char(NULL, 0) >= 0)
 		goto error;
@@ -188,30 +195,15 @@  test_cmdline_fns(void)
 	cmdline_set_prompt(NULL, "prompt");
 	cmdline_free(NULL);
 	cmdline_printf(NULL, "format");
-	/* this should fail as stream handles are invalid */
-	cmdline_printf(tmp, "format");
 	cmdline_interact(NULL);
 	cmdline_quit(NULL);
 
-	/* check if void calls change anything when they should fail */
-	cl = *tmp;
-
-	cmdline_printf(&cl, NULL);
-	if (memcmp(&cl, tmp, sizeof(cl))) goto mismatch;
-	cmdline_set_prompt(&cl, NULL);
-	if (memcmp(&cl, tmp, sizeof(cl))) goto mismatch;
-	cmdline_in(&cl, NULL, CMDLINE_TEST_BUFSIZE);
-	if (memcmp(&cl, tmp, sizeof(cl))) goto mismatch;
-
-	cmdline_free(tmp);
-
 	return 0;
 
 error:
 	printf("Error: function accepted null parameter!\n");
-	return -1;
-mismatch:
-	printf("Error: data changed!\n");
+	if (cl != NULL)
+		cmdline_free(cl);
 	return -1;
 }
 
diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index 9691f2c57..7ae013c27 100644
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -255,3 +255,7 @@  Deprecation Notices
   ``make``. Given environments are too much variables for such a simple script,
   it will be removed in DPDK 20.11.
   Some useful parts may be converted into specific scripts.
+
+* cmdline: ``cmdline`` structure will be made opaque to hide platform-specific
+  content. On Linux and FreeBSD, supported prior to DPDK 20.11,
+  original structure will be kept until DPDK 21.11.
\ No newline at end of file
diff --git a/lib/librte_cmdline/cmdline.c b/lib/librte_cmdline/cmdline.c
index cfd703e5b..41f50cc56 100644
--- a/lib/librte_cmdline/cmdline.c
+++ b/lib/librte_cmdline/cmdline.c
@@ -13,13 +13,10 @@ 
 #include <fcntl.h>
 #include <poll.h>
 #include <errno.h>
-#include <termios.h>
 #include <netinet/in.h>
 
 #include <rte_string_fns.h>
 
-#include "cmdline_parse.h"
-#include "cmdline_rdline.h"
 #include "cmdline.h"
 
 static void
@@ -103,6 +100,12 @@  cmdline_new(cmdline_parse_ctx_t *ctx, const char *prompt, int s_in, int s_out)
 	return cl;
 }
 
+struct rdline*
+cmdline_get_rdline(struct cmdline *cl)
+{
+	return &cl->rdl;
+}
+
 void
 cmdline_free(struct cmdline *cl)
 {
diff --git a/lib/librte_cmdline/cmdline.h b/lib/librte_cmdline/cmdline.h
index 243f99d20..c29762dda 100644
--- a/lib/librte_cmdline/cmdline.h
+++ b/lib/librte_cmdline/cmdline.h
@@ -7,9 +7,13 @@ 
 #ifndef _CMDLINE_H_
 #define _CMDLINE_H_
 
+#ifndef RTE_EXEC_ENV_WINDOWS
+#include <termios.h>
+#endif
+
 #include <rte_common.h>
+#include <rte_compat.h>
 
-#include <termios.h>
 #include <cmdline_rdline.h>
 #include <cmdline_parse.h>
 
@@ -23,6 +27,8 @@ 
 extern "C" {
 #endif
 
+#ifndef RTE_EXEC_ENV_WINDOWS
+
 struct cmdline {
 	int s_in;
 	int s_out;
@@ -32,6 +38,12 @@  struct cmdline {
 	struct termios oldterm;
 };
 
+#else
+
+struct cmdline;
+
+#endif /* RTE_EXEC_ENV_WINDOWS */
+
 struct cmdline *cmdline_new(cmdline_parse_ctx_t *ctx, const char *prompt, int s_in, int s_out);
 void cmdline_set_prompt(struct cmdline *cl, const char *prompt);
 void cmdline_free(struct cmdline *cl);
@@ -40,6 +52,10 @@  void cmdline_printf(const struct cmdline *cl, const char *fmt, ...)
 int cmdline_in(struct cmdline *cl, const char *buf, int size);
 int cmdline_write_char(struct rdline *rdl, char c);
 
+__rte_experimental
+struct rdline *
+cmdline_get_rdline(struct cmdline *cl);
+
 /**
  * This function is nonblocking equivalent of ``cmdline_interact()``. It polls
  * *cl* for one character and interpret it. If return value is *RDLINE_EXITED*
diff --git a/lib/librte_cmdline/cmdline_parse.c b/lib/librte_cmdline/cmdline_parse.c
index b57b30e8f..f120f19dd 100644
--- a/lib/librte_cmdline/cmdline_parse.c
+++ b/lib/librte_cmdline/cmdline_parse.c
@@ -10,14 +10,11 @@ 
 #include <string.h>
 #include <inttypes.h>
 #include <ctype.h>
-#include <termios.h>
 
 #include <netinet/in.h>
 
 #include <rte_string_fns.h>
 
-#include "cmdline_rdline.h"
-#include "cmdline_parse.h"
 #include "cmdline.h"
 
 #ifdef RTE_LIBRTE_CMDLINE_DEBUG
diff --git a/lib/librte_cmdline/cmdline_socket.c b/lib/librte_cmdline/cmdline_socket.c
index ecb3d82b6..6c89d2171 100644
--- a/lib/librte_cmdline/cmdline_socket.c
+++ b/lib/librte_cmdline/cmdline_socket.c
@@ -11,12 +11,9 @@ 
 #include <stdarg.h>
 #include <inttypes.h>
 #include <fcntl.h>
-#include <termios.h>
 
-#include "cmdline_parse.h"
-#include "cmdline_rdline.h"
-#include "cmdline_socket.h"
 #include "cmdline.h"
+#include "cmdline_socket.h"
 
 struct cmdline *
 cmdline_file_new(cmdline_parse_ctx_t *ctx, const char *prompt, const char *path)
diff --git a/lib/librte_cmdline/rte_cmdline_version.map b/lib/librte_cmdline/rte_cmdline_version.map
index a99104457..9df027215 100644
--- a/lib/librte_cmdline/rte_cmdline_version.map
+++ b/lib/librte_cmdline/rte_cmdline_version.map
@@ -69,3 +69,11 @@  DPDK_21 {
 
 	local: *;
 };
+
+EXPERIMENTAL {
+	global:
+
+	cmdline_get_rdline;
+
+	local: *;
+};