diff mbox series

[net-next,v5,01/10] net: psample: add user cookie

Message ID 20240625205204.3199050-2-amorenoz@redhat.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series net: openvswitch: Add sample multicasting. | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; GEN HAS DIFF 2 files changed, 276 insertions(+), 164 deletions(-);
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 842 this patch: 842
netdev/build_tools success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 849 this patch: 849
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 856 this patch: 856
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 36 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Adrián Moreno June 25, 2024, 8:51 p.m. UTC 
Add a user cookie to the sample metadata so that sample emitters can
provide more contextual information to samples.

If present, send the user cookie in a new attribute:
PSAMPLE_ATTR_USER_COOKIE.

Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
---
 include/net/psample.h        | 2 ++
 include/uapi/linux/psample.h | 1 +
 net/psample/psample.c        | 9 ++++++++-
 3 files changed, 11 insertions(+), 1 deletion(-)

Comments

Ido Schimmel June 26, 2024, 7:15 a.m. UTC | #1 
On Tue, Jun 25, 2024 at 10:51:44PM +0200, Adrian Moreno wrote:
> Add a user cookie to the sample metadata so that sample emitters can
> provide more contextual information to samples.
> 
> If present, send the user cookie in a new attribute:
> PSAMPLE_ATTR_USER_COOKIE.
> 
> Reviewed-by: Simon Horman <horms@kernel.org>
> Signed-off-by: Adrian Moreno <amorenoz@redhat.com>

Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Eelco Chaudron June 26, 2024, 2:27 p.m. UTC | #2 
On 25 Jun 2024, at 22:51, Adrian Moreno wrote:

> Add a user cookie to the sample metadata so that sample emitters can
> provide more contextual information to samples.
>
> If present, send the user cookie in a new attribute:
> PSAMPLE_ATTR_USER_COOKIE.
>
> Reviewed-by: Simon Horman <horms@kernel.org>
> Signed-off-by: Adrian Moreno <amorenoz@redhat.com>

Acked-by: Eelco Chaudron <echaudro@redhat.com>
diff mbox series

Patch

diff --git a/include/net/psample.h b/include/net/psample.h
index 0509d2d6be67..2ac71260a546 100644
--- a/include/net/psample.h
+++ b/include/net/psample.h
@@ -25,6 +25,8 @@  struct psample_metadata {
 	   out_tc_occ_valid:1,
 	   latency_valid:1,
 	   unused:5;
+	const u8 *user_cookie;
+	u32 user_cookie_len;
 };
 
 struct psample_group *psample_group_get(struct net *net, u32 group_num);
diff --git a/include/uapi/linux/psample.h b/include/uapi/linux/psample.h
index e585db5bf2d2..e80637e1d97b 100644
--- a/include/uapi/linux/psample.h
+++ b/include/uapi/linux/psample.h
@@ -19,6 +19,7 @@  enum {
 	PSAMPLE_ATTR_LATENCY,		/* u64, nanoseconds */
 	PSAMPLE_ATTR_TIMESTAMP,		/* u64, nanoseconds */
 	PSAMPLE_ATTR_PROTO,		/* u16 */
+	PSAMPLE_ATTR_USER_COOKIE,	/* binary, user provided data */
 
 	__PSAMPLE_ATTR_MAX
 };
diff --git a/net/psample/psample.c b/net/psample/psample.c
index a5d9b8446f77..b37488f426bc 100644
--- a/net/psample/psample.c
+++ b/net/psample/psample.c
@@ -386,7 +386,9 @@  void psample_sample_packet(struct psample_group *group, struct sk_buff *skb,
 		   nla_total_size(sizeof(u32)) +	/* group_num */
 		   nla_total_size(sizeof(u32)) +	/* seq */
 		   nla_total_size_64bit(sizeof(u64)) +	/* timestamp */
-		   nla_total_size(sizeof(u16));		/* protocol */
+		   nla_total_size(sizeof(u16)) +	/* protocol */
+		   (md->user_cookie_len ?
+		    nla_total_size(md->user_cookie_len) : 0); /* user cookie */
 
 #ifdef CONFIG_INET
 	tun_info = skb_tunnel_info(skb);
@@ -486,6 +488,11 @@  void psample_sample_packet(struct psample_group *group, struct sk_buff *skb,
 	}
 #endif
 
+	if (md->user_cookie && md->user_cookie_len &&
+	    nla_put(nl_skb, PSAMPLE_ATTR_USER_COOKIE, md->user_cookie_len,
+		    md->user_cookie))
+		goto error;
+
 	genlmsg_end(nl_skb, data);
 	genlmsg_multicast_netns(&psample_nl_family, group->net, nl_skb, 0,
 				PSAMPLE_NL_MCGRP_SAMPLE, GFP_ATOMIC);