lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date:   Thu,  3 Jan 2019 10:33:05 -0800
From:   Stanislav Fomichev <sdf@...gle.com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, ast@...nel.org, daniel@...earbox.net,
        jakub.kicinski@...ronome.com, quentin.monnet@...ronome.com,
        Stanislav Fomichev <sdf@...gle.com>
Subject: [PATCH bpf 1/2] bpftool: support queues and stacks in update command

Bpftool expects both key and value for 'update' operations. For some
map types, key should not be specified. Support updating those map types.

Before:
bpftool map create /sys/fs/bpf/q type queue value 4 entries 10 name q
bpftool map update pinned /sys/fs/bpf/q value 0 1 2 3
Error: did not find key

After:
bpftool map create /sys/fs/bpf/q type queue value 4 entries 10 name q
bpftool map update pinned /sys/fs/bpf/q value 0 1 2 3

Signed-off-by: Stanislav Fomichev <sdf@...gle.com>
---
 tools/bpf/bpftool/Documentation/bpftool-map.rst |  4 ++--
 tools/bpf/bpftool/map.c                         | 15 +++++++++++----
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/tools/bpf/bpftool/Documentation/bpftool-map.rst b/tools/bpf/bpftool/Documentation/bpftool-map.rst
index 64b001b4f777..81842fdf483d 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-map.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-map.rst
@@ -25,7 +25,7 @@ MAP COMMANDS
 |	**bpftool** **map create**     *FILE* **type** *TYPE* **key** *KEY_SIZE* **value** *VALUE_SIZE* \
 |		**entries** *MAX_ENTRIES* **name** *NAME* [**flags** *FLAGS*] [**dev** *NAME*]
 |	**bpftool** **map dump**       *MAP*
-|	**bpftool** **map update**     *MAP*  **key** *DATA*   **value** *VALUE* [*UPDATE_FLAGS*]
+|	**bpftool** **map update**     *MAP* [**key** *DATA*]  **value** *VALUE* [*UPDATE_FLAGS*]
 |	**bpftool** **map lookup**     *MAP*  **key** *DATA*
 |	**bpftool** **map getnext**    *MAP* [**key** *DATA*]
 |	**bpftool** **map delete**     *MAP*  **key** *DATA*
@@ -62,7 +62,7 @@ DESCRIPTION
 	**bpftool map dump**    *MAP*
 		  Dump all entries in a given *MAP*.
 
-	**bpftool map update**  *MAP*  **key** *DATA*   **value** *VALUE* [*UPDATE_FLAGS*]
+	**bpftool map update**  *MAP* [**key** *DATA*]  **value** *VALUE* [*UPDATE_FLAGS*]
 		  Update map entry for a given *KEY*.
 
 		  *UPDATE_FLAGS* can be one of: **any** update existing entry
diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c
index 2037e3dc864b..30b92715248d 100644
--- a/tools/bpf/bpftool/map.c
+++ b/tools/bpf/bpftool/map.c
@@ -781,11 +781,11 @@ static int do_dump(int argc, char **argv)
 
 static int do_update(int argc, char **argv)
 {
+	void *key = NULL, *value = NULL;
 	struct bpf_map_info info = {};
 	__u32 len = sizeof(info);
 	__u32 *value_fd = NULL;
 	__u32 flags = BPF_ANY;
-	void *key, *value;
 	int fd, err;
 
 	if (argc < 2)
@@ -795,9 +795,16 @@ static int do_update(int argc, char **argv)
 	if (fd < 0)
 		return -1;
 
-	key = malloc(info.key_size);
+	if (info.key_size) {
+		key = malloc(info.key_size);
+		if (!key) {
+			p_err("mem alloc failed");
+			err = -1;
+			goto exit_free;
+		}
+	}
 	value = alloc_value(&info);
-	if (!key || !value) {
+	if (!value) {
 		p_err("mem alloc failed");
 		err = -1;
 		goto exit_free;
@@ -1135,7 +1142,7 @@ static int do_help(int argc, char **argv)
 		"                              entries MAX_ENTRIES name NAME [flags FLAGS] \\\n"
 		"                              [dev NAME]\n"
 		"       %s %s dump       MAP\n"
-		"       %s %s update     MAP  key DATA value VALUE [UPDATE_FLAGS]\n"
+		"       %s %s update     MAP [key DATA] value VALUE [UPDATE_FLAGS]\n"
 		"       %s %s lookup     MAP  key DATA\n"
 		"       %s %s getnext    MAP [key DATA]\n"
 		"       %s %s delete     MAP  key DATA\n"
-- 
2.20.1.415.g653613c723-goog

Powered by blists - more mailing lists