diff mbox series

[bpf-next,08/15] selftests/xsk: remove namespaces

Message ID 20221206090826.2957-9-magnus.karlsson@gmail.com (mailing list archive)
State Changes Requested
Delegated to: BPF
Headers show
Series selftests/xsk: speed-ups, fixes, and new XDP programs | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for bpf-next, async
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
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netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
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netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success net selftest script(s) already in Makefile
netdev/verify_fixes success No Fixes tag
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Commit Message

Magnus Karlsson Dec. 6, 2022, 9:08 a.m. UTC 
From: Magnus Karlsson <magnus.karlsson@intel.com>

Remove the namespaces used as they fill no function. This will
simplify the code for speeding up the tests in the following commits.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
---
 tools/testing/selftests/bpf/test_xsk.sh    | 33 +++++++----------
 tools/testing/selftests/bpf/xsk_prereqs.sh | 12 ++-----
 tools/testing/selftests/bpf/xskxceiver.c   | 42 +++-------------------
 tools/testing/selftests/bpf/xskxceiver.h   |  3 --
 4 files changed, 19 insertions(+), 71 deletions(-)

Comments

Fijalkowski, Maciej Dec. 12, 2022, 2:19 p.m. UTC | #1 
On Tue, Dec 06, 2022 at 10:08:19AM +0100, Magnus Karlsson wrote:
> From: Magnus Karlsson <magnus.karlsson@intel.com>
> 
> Remove the namespaces used as they fill no function. This will
> simplify the code for speeding up the tests in the following commits.
> 
> Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
> ---
>  tools/testing/selftests/bpf/test_xsk.sh    | 33 +++++++----------
>  tools/testing/selftests/bpf/xsk_prereqs.sh | 12 ++-----
>  tools/testing/selftests/bpf/xskxceiver.c   | 42 +++-------------------
>  tools/testing/selftests/bpf/xskxceiver.h   |  3 --
>  4 files changed, 19 insertions(+), 71 deletions(-)
> 

(...)

> diff --git a/tools/testing/selftests/bpf/xskxceiver.c b/tools/testing/selftests/bpf/xskxceiver.c
> index 72578cebfbf7..0aaf2f0a9d75 100644
> --- a/tools/testing/selftests/bpf/xskxceiver.c
> +++ b/tools/testing/selftests/bpf/xskxceiver.c
> @@ -55,12 +55,11 @@
>   * Flow:
>   * -----
>   * - Single process spawns two threads: Tx and Rx
> - * - Each of these two threads attach to a veth interface within their assigned
> - *   namespaces
> - * - Each thread Creates one AF_XDP socket connected to a unique umem for each
> + * - Each of these two threads attach to a veth interface
> + * - Each thread creates one AF_XDP socket connected to a unique umem for each
>   *   veth interface
> - * - Tx thread Transmits 10k packets from veth<xxxx> to veth<yyyy>
> - * - Rx thread verifies if all 10k packets were received and delivered in-order,
> + * - Tx thread Transmits a number of packets from veth<xxxx> to veth<yyyy>
> + * - Rx thread verifies if all packets were received and delivered in-order,
>   *   and have the right content
>   *
>   * Enable/disable packet dump mode:
> @@ -399,28 +398,6 @@ static void usage(const char *prog)
>  	ksft_print_msg(str, prog);
>  }
>  
> -static int switch_namespace(const char *nsname)
> -{
> -	char fqns[26] = "/var/run/netns/";
> -	int nsfd;
> -
> -	if (!nsname || strlen(nsname) == 0)
> -		return -1;
> -
> -	strncat(fqns, nsname, sizeof(fqns) - strlen(fqns) - 1);
> -	nsfd = open(fqns, O_RDONLY);
> -
> -	if (nsfd == -1)
> -		exit_with_error(errno);
> -
> -	if (setns(nsfd, 0) == -1)
> -		exit_with_error(errno);
> -
> -	print_verbose("NS switched: %s\n", nsname);
> -
> -	return nsfd;
> -}
> -
>  static bool validate_interface(struct ifobject *ifobj)
>  {
>  	if (!strcmp(ifobj->ifname, ""))
> @@ -438,7 +415,7 @@ static void parse_command_line(struct ifobject *ifobj_tx, struct ifobject *ifobj
>  	opterr = 0;
>  
>  	for (;;) {
> -		char *sptr, *token;
> +		char *sptr;
>  
>  		c = getopt_long(argc, argv, "i:Dvb", long_options, &option_index);
>  		if (c == -1)
> @@ -455,9 +432,6 @@ static void parse_command_line(struct ifobject *ifobj_tx, struct ifobject *ifobj
>  
>  			sptr = strndupa(optarg, strlen(optarg));

Wasn't this strndupa needed only because of strsep usage?
I feel that now you can just memcpy directly from optarg to ifobj->nsname.

>  			memcpy(ifobj->ifname, strsep(&sptr, ","), MAX_INTERFACE_NAME_CHARS);
> -			token = strsep(&sptr, ",");
> -			if (token)
> -				memcpy(ifobj->nsname, token, MAX_INTERFACES_NAMESPACE_CHARS);
>  			interface_nb++;
>  			break;
>  		case 'D':
> @@ -1283,8 +1257,6 @@ static void thread_common_ops(struct test_spec *test, struct ifobject *ifobject)
>  	int ret, ifindex;
>  	void *bufs;
>  
> -	ifobject->ns_fd = switch_namespace(ifobject->nsname);
> -
>  	if (ifobject->umem->unaligned_mode)
>  		mmap_flags |= MAP_HUGETLB;
>  
> @@ -1843,8 +1815,6 @@ static struct ifobject *ifobject_create(void)
>  	if (!ifobj->umem)
>  		goto out_umem;
>  
> -	ifobj->ns_fd = -1;
> -
>  	return ifobj;
>  
>  out_umem:
> @@ -1856,8 +1826,6 @@ static struct ifobject *ifobject_create(void)
>  
>  static void ifobject_delete(struct ifobject *ifobj)
>  {
> -	if (ifobj->ns_fd != -1)
> -		close(ifobj->ns_fd);
>  	free(ifobj->umem);
>  	free(ifobj->xsk_arr);
>  	free(ifobj);

(...)
Magnus Karlsson Dec. 14, 2022, 10:44 a.m. UTC | #2 
On Mon, Dec 12, 2022 at 3:20 PM Maciej Fijalkowski
<maciej.fijalkowski@intel.com> wrote:
>
> On Tue, Dec 06, 2022 at 10:08:19AM +0100, Magnus Karlsson wrote:
> > From: Magnus Karlsson <magnus.karlsson@intel.com>
> >
> > Remove the namespaces used as they fill no function. This will
> > simplify the code for speeding up the tests in the following commits.
> >
> > Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
> > ---
> >  tools/testing/selftests/bpf/test_xsk.sh    | 33 +++++++----------
> >  tools/testing/selftests/bpf/xsk_prereqs.sh | 12 ++-----
> >  tools/testing/selftests/bpf/xskxceiver.c   | 42 +++-------------------
> >  tools/testing/selftests/bpf/xskxceiver.h   |  3 --
> >  4 files changed, 19 insertions(+), 71 deletions(-)
> >
>
> (...)
>
> > diff --git a/tools/testing/selftests/bpf/xskxceiver.c b/tools/testing/selftests/bpf/xskxceiver.c
> > index 72578cebfbf7..0aaf2f0a9d75 100644
> > --- a/tools/testing/selftests/bpf/xskxceiver.c
> > +++ b/tools/testing/selftests/bpf/xskxceiver.c
> > @@ -55,12 +55,11 @@
> >   * Flow:
> >   * -----
> >   * - Single process spawns two threads: Tx and Rx
> > - * - Each of these two threads attach to a veth interface within their assigned
> > - *   namespaces
> > - * - Each thread Creates one AF_XDP socket connected to a unique umem for each
> > + * - Each of these two threads attach to a veth interface
> > + * - Each thread creates one AF_XDP socket connected to a unique umem for each
> >   *   veth interface
> > - * - Tx thread Transmits 10k packets from veth<xxxx> to veth<yyyy>
> > - * - Rx thread verifies if all 10k packets were received and delivered in-order,
> > + * - Tx thread Transmits a number of packets from veth<xxxx> to veth<yyyy>
> > + * - Rx thread verifies if all packets were received and delivered in-order,
> >   *   and have the right content
> >   *
> >   * Enable/disable packet dump mode:
> > @@ -399,28 +398,6 @@ static void usage(const char *prog)
> >       ksft_print_msg(str, prog);
> >  }
> >
> > -static int switch_namespace(const char *nsname)
> > -{
> > -     char fqns[26] = "/var/run/netns/";
> > -     int nsfd;
> > -
> > -     if (!nsname || strlen(nsname) == 0)
> > -             return -1;
> > -
> > -     strncat(fqns, nsname, sizeof(fqns) - strlen(fqns) - 1);
> > -     nsfd = open(fqns, O_RDONLY);
> > -
> > -     if (nsfd == -1)
> > -             exit_with_error(errno);
> > -
> > -     if (setns(nsfd, 0) == -1)
> > -             exit_with_error(errno);
> > -
> > -     print_verbose("NS switched: %s\n", nsname);
> > -
> > -     return nsfd;
> > -}
> > -
> >  static bool validate_interface(struct ifobject *ifobj)
> >  {
> >       if (!strcmp(ifobj->ifname, ""))
> > @@ -438,7 +415,7 @@ static void parse_command_line(struct ifobject *ifobj_tx, struct ifobject *ifobj
> >       opterr = 0;
> >
> >       for (;;) {
> > -             char *sptr, *token;
> > +             char *sptr;
> >
> >               c = getopt_long(argc, argv, "i:Dvb", long_options, &option_index);
> >               if (c == -1)
> > @@ -455,9 +432,6 @@ static void parse_command_line(struct ifobject *ifobj_tx, struct ifobject *ifobj
> >
> >                       sptr = strndupa(optarg, strlen(optarg));
>
> Wasn't this strndupa needed only because of strsep usage?
> I feel that now you can just memcpy directly from optarg to ifobj->nsname.

Will fix.

> >                       memcpy(ifobj->ifname, strsep(&sptr, ","), MAX_INTERFACE_NAME_CHARS);
> > -                     token = strsep(&sptr, ",");
> > -                     if (token)
> > -                             memcpy(ifobj->nsname, token, MAX_INTERFACES_NAMESPACE_CHARS);
> >                       interface_nb++;
> >                       break;
> >               case 'D':
> > @@ -1283,8 +1257,6 @@ static void thread_common_ops(struct test_spec *test, struct ifobject *ifobject)
> >       int ret, ifindex;
> >       void *bufs;
> >
> > -     ifobject->ns_fd = switch_namespace(ifobject->nsname);
> > -
> >       if (ifobject->umem->unaligned_mode)
> >               mmap_flags |= MAP_HUGETLB;
> >
> > @@ -1843,8 +1815,6 @@ static struct ifobject *ifobject_create(void)
> >       if (!ifobj->umem)
> >               goto out_umem;
> >
> > -     ifobj->ns_fd = -1;
> > -
> >       return ifobj;
> >
> >  out_umem:
> > @@ -1856,8 +1826,6 @@ static struct ifobject *ifobject_create(void)
> >
> >  static void ifobject_delete(struct ifobject *ifobj)
> >  {
> > -     if (ifobj->ns_fd != -1)
> > -             close(ifobj->ns_fd);
> >       free(ifobj->umem);
> >       free(ifobj->xsk_arr);
> >       free(ifobj);
>
> (...)
diff mbox series

Patch

diff --git a/tools/testing/selftests/bpf/test_xsk.sh b/tools/testing/selftests/bpf/test_xsk.sh
index cb315d85148b..b077cf58f825 100755
--- a/tools/testing/selftests/bpf/test_xsk.sh
+++ b/tools/testing/selftests/bpf/test_xsk.sh
@@ -24,8 +24,6 @@ 
 #      -----------     |     ----------
 #      |  vethX  | --------- |  vethY |
 #      -----------   peer    ----------
-#           |          |          |
-#      namespaceX      |     namespaceY
 #
 # AF_XDP is an address family optimized for high performance packet processing,
 # it is XDP’s user-space interface.
@@ -39,10 +37,9 @@ 
 # Prerequisites setup by script:
 #
 #   Set up veth interfaces as per the topology shown ^^:
-#   * setup two veth interfaces and one namespace
-#   ** veth<xxxx> in root namespace
-#   ** veth<yyyy> in af_xdp<xxxx> namespace
-#   ** namespace af_xdp<xxxx>
+#   * setup two veth interfaces
+#   ** veth<xxxx>
+#   ** veth<yyyy>
 #   *** xxxx and yyyy are randomly generated 4 digit numbers used to avoid
 #       conflict with any existing interface
 #   * tests the veth and xsk layers of the topology
@@ -103,28 +100,25 @@  VETH0_POSTFIX=$(cat ${URANDOM} | tr -dc '0-9' | fold -w 256 | head -n 1 | head -
 VETH0=ve${VETH0_POSTFIX}
 VETH1_POSTFIX=$(cat ${URANDOM} | tr -dc '0-9' | fold -w 256 | head -n 1 | head --bytes 4)
 VETH1=ve${VETH1_POSTFIX}
-NS0=root
-NS1=af_xdp${VETH1_POSTFIX}
 MTU=1500
 
 trap ctrl_c INT
 
 function ctrl_c() {
-        cleanup_exit ${VETH0} ${VETH1} ${NS1}
+        cleanup_exit ${VETH0} ${VETH1}
 	exit 1
 }
 
 setup_vethPairs() {
 	if [[ $verbose -eq 1 ]]; then
-	        echo "setting up ${VETH0}: namespace: ${NS0}"
+	        echo "setting up ${VETH0}"
 	fi
-	ip netns add ${NS1}
 	ip link add ${VETH0} numtxqueues 4 numrxqueues 4 type veth peer name ${VETH1} numtxqueues 4 numrxqueues 4
 	if [ -f /proc/net/if_inet6 ]; then
 		echo 1 > /proc/sys/net/ipv6/conf/${VETH0}/disable_ipv6
 	fi
 	if [[ $verbose -eq 1 ]]; then
-	        echo "setting up ${VETH1}: namespace: ${NS1}"
+	        echo "setting up ${VETH1}"
 	fi
 
 	if [[ $busy_poll -eq 1 ]]; then
@@ -134,18 +128,15 @@  setup_vethPairs() {
 		echo 200000 > /sys/class/net/${VETH1}/gro_flush_timeout
 	fi
 
-	ip link set ${VETH1} netns ${NS1}
-	ip netns exec ${NS1} ip link set ${VETH1} mtu ${MTU}
+	ip link set ${VETH1} mtu ${MTU}
 	ip link set ${VETH0} mtu ${MTU}
-	ip netns exec ${NS1} ip link set ${VETH1} up
-	ip netns exec ${NS1} ip link set dev lo up
+	ip link set ${VETH1} up
 	ip link set ${VETH0} up
 }
 
 if [ ! -z $ETH ]; then
 	VETH0=${ETH}
 	VETH1=${ETH}
-	NS1=""
 else
 	validate_root_exec
 	validate_veth_support ${VETH0}
@@ -155,7 +146,7 @@  else
 	retval=$?
 	if [ $retval -ne 0 ]; then
 		test_status $retval "${TEST_NAME}"
-		cleanup_exit ${VETH0} ${VETH1} ${NS1}
+		cleanup_exit ${VETH0} ${VETH1}
 		exit $retval
 	fi
 fi
@@ -179,14 +170,14 @@  statusList=()
 TEST_NAME="XSK_SELFTESTS_${VETH0}_SOFTIRQ"
 
 if [[ $debug -eq 1 ]]; then
-    echo "-i" ${VETH0} "-i" ${VETH1},${NS1}
+    echo "-i" ${VETH0} "-i" ${VETH1}
     exit
 fi
 
 exec_xskxceiver
 
 if [ -z $ETH ]; then
-	cleanup_exit ${VETH0} ${VETH1} ${NS1}
+	cleanup_exit ${VETH0} ${VETH1}
 fi
 TEST_NAME="XSK_SELFTESTS_${VETH0}_BUSY_POLL"
 busy_poll=1
@@ -199,7 +190,7 @@  exec_xskxceiver
 ## END TESTS
 
 if [ -z $ETH ]; then
-	cleanup_exit ${VETH0} ${VETH1} ${NS1}
+	cleanup_exit ${VETH0} ${VETH1}
 fi
 
 failures=0
diff --git a/tools/testing/selftests/bpf/xsk_prereqs.sh b/tools/testing/selftests/bpf/xsk_prereqs.sh
index a0b71723a818..ae697a10a056 100755
--- a/tools/testing/selftests/bpf/xsk_prereqs.sh
+++ b/tools/testing/selftests/bpf/xsk_prereqs.sh
@@ -55,21 +55,13 @@  test_exit()
 
 clear_configs()
 {
-	if [ $(ip netns show | grep $3 &>/dev/null; echo $?;) == 0 ]; then
-		[ $(ip netns exec $3 ip link show $2 &>/dev/null; echo $?;) == 0 ] &&
-			{ ip netns exec $3 ip link del $2; }
-		ip netns del $3
-	fi
-	#Once we delete a veth pair node, the entire veth pair is removed,
-	#this is just to be cautious just incase the NS does not exist then
-	#veth node inside NS won't get removed so we explicitly remove it
 	[ $(ip link show $1 &>/dev/null; echo $?;) == 0 ] &&
 		{ ip link del $1; }
 }
 
 cleanup_exit()
 {
-	clear_configs $1 $2 $3
+	clear_configs $1 $2
 }
 
 validate_ip_utility()
@@ -83,7 +75,7 @@  exec_xskxceiver()
 	        ARGS+="-b "
 	fi
 
-	./${XSKOBJ} -i ${VETH0} -i ${VETH1},${NS1} ${ARGS}
+	./${XSKOBJ} -i ${VETH0} -i ${VETH1} ${ARGS}
 
 	retval=$?
 	test_status $retval "${TEST_NAME}"
diff --git a/tools/testing/selftests/bpf/xskxceiver.c b/tools/testing/selftests/bpf/xskxceiver.c
index 72578cebfbf7..0aaf2f0a9d75 100644
--- a/tools/testing/selftests/bpf/xskxceiver.c
+++ b/tools/testing/selftests/bpf/xskxceiver.c
@@ -55,12 +55,11 @@ 
  * Flow:
  * -----
  * - Single process spawns two threads: Tx and Rx
- * - Each of these two threads attach to a veth interface within their assigned
- *   namespaces
- * - Each thread Creates one AF_XDP socket connected to a unique umem for each
+ * - Each of these two threads attach to a veth interface
+ * - Each thread creates one AF_XDP socket connected to a unique umem for each
  *   veth interface
- * - Tx thread Transmits 10k packets from veth<xxxx> to veth<yyyy>
- * - Rx thread verifies if all 10k packets were received and delivered in-order,
+ * - Tx thread Transmits a number of packets from veth<xxxx> to veth<yyyy>
+ * - Rx thread verifies if all packets were received and delivered in-order,
  *   and have the right content
  *
  * Enable/disable packet dump mode:
@@ -399,28 +398,6 @@  static void usage(const char *prog)
 	ksft_print_msg(str, prog);
 }
 
-static int switch_namespace(const char *nsname)
-{
-	char fqns[26] = "/var/run/netns/";
-	int nsfd;
-
-	if (!nsname || strlen(nsname) == 0)
-		return -1;
-
-	strncat(fqns, nsname, sizeof(fqns) - strlen(fqns) - 1);
-	nsfd = open(fqns, O_RDONLY);
-
-	if (nsfd == -1)
-		exit_with_error(errno);
-
-	if (setns(nsfd, 0) == -1)
-		exit_with_error(errno);
-
-	print_verbose("NS switched: %s\n", nsname);
-
-	return nsfd;
-}
-
 static bool validate_interface(struct ifobject *ifobj)
 {
 	if (!strcmp(ifobj->ifname, ""))
@@ -438,7 +415,7 @@  static void parse_command_line(struct ifobject *ifobj_tx, struct ifobject *ifobj
 	opterr = 0;
 
 	for (;;) {
-		char *sptr, *token;
+		char *sptr;
 
 		c = getopt_long(argc, argv, "i:Dvb", long_options, &option_index);
 		if (c == -1)
@@ -455,9 +432,6 @@  static void parse_command_line(struct ifobject *ifobj_tx, struct ifobject *ifobj
 
 			sptr = strndupa(optarg, strlen(optarg));
 			memcpy(ifobj->ifname, strsep(&sptr, ","), MAX_INTERFACE_NAME_CHARS);
-			token = strsep(&sptr, ",");
-			if (token)
-				memcpy(ifobj->nsname, token, MAX_INTERFACES_NAMESPACE_CHARS);
 			interface_nb++;
 			break;
 		case 'D':
@@ -1283,8 +1257,6 @@  static void thread_common_ops(struct test_spec *test, struct ifobject *ifobject)
 	int ret, ifindex;
 	void *bufs;
 
-	ifobject->ns_fd = switch_namespace(ifobject->nsname);
-
 	if (ifobject->umem->unaligned_mode)
 		mmap_flags |= MAP_HUGETLB;
 
@@ -1843,8 +1815,6 @@  static struct ifobject *ifobject_create(void)
 	if (!ifobj->umem)
 		goto out_umem;
 
-	ifobj->ns_fd = -1;
-
 	return ifobj;
 
 out_umem:
@@ -1856,8 +1826,6 @@  static struct ifobject *ifobject_create(void)
 
 static void ifobject_delete(struct ifobject *ifobj)
 {
-	if (ifobj->ns_fd != -1)
-		close(ifobj->ns_fd);
 	free(ifobj->umem);
 	free(ifobj->xsk_arr);
 	free(ifobj);
diff --git a/tools/testing/selftests/bpf/xskxceiver.h b/tools/testing/selftests/bpf/xskxceiver.h
index edb76d2def9f..dcb908f5bb4c 100644
--- a/tools/testing/selftests/bpf/xskxceiver.h
+++ b/tools/testing/selftests/bpf/xskxceiver.h
@@ -30,7 +30,6 @@ 
 #define TEST_CONTINUE 1
 #define MAX_INTERFACES 2
 #define MAX_INTERFACE_NAME_CHARS 16
-#define MAX_INTERFACES_NAMESPACE_CHARS 16
 #define MAX_SOCKETS 2
 #define MAX_TEST_NAME_SIZE 32
 #define MAX_TEARDOWN_ITER 10
@@ -133,14 +132,12 @@  typedef void *(*thread_func_t)(void *arg);
 
 struct ifobject {
 	char ifname[MAX_INTERFACE_NAME_CHARS];
-	char nsname[MAX_INTERFACES_NAMESPACE_CHARS];
 	struct xsk_socket_info *xsk;
 	struct xsk_socket_info *xsk_arr;
 	struct xsk_umem_info *umem;
 	thread_func_t func_ptr;
 	validation_func_t validation_func;
 	struct pkt_stream *pkt_stream;
-	int ns_fd;
 	int xsk_map_fd;
 	u32 dst_ip;
 	u32 src_ip;