diff mbox series

[3/7] devlink: add devlink_fmsg_dump_skb() function

Message ID 20240930133724.610512-4-przemyslaw.kitszel@intel.com (mailing list archive)
State Awaiting Upstream
Delegated to: Netdev Maintainers
Headers show
Series ice: add support for devlink health events | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Guessed tree name to be net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
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: 9 this patch: 9
netdev/build_tools success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers warning 2 maintainers not CCed: pabeni@redhat.com edumazet@google.com
netdev/build_clang success Errors and warnings before: 16 this patch: 16
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 fail Errors and warnings before: 12 this patch: 12
netdev/checkpatch warning WARNING: line length of 81 exceeds 80 columns
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 2 this patch: 2
netdev/source_inline success Was 0 now: 0

Commit Message

Przemek Kitszel Sept. 30, 2024, 1:37 p.m. UTC 
From: Mateusz Polchlopek <mateusz.polchlopek@intel.com>

Add devlink_fmsg_dump_skb() function that adds some diagnostic
information about skb (like length, pkt type, MAC, etc) to devlink
fmsg mechanism using bunch of devlink_fmsg_put() function calls.

Signed-off-by: Mateusz Polchlopek <mateusz.polchlopek@intel.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
---
 include/net/devlink.h |  2 ++
 net/devlink/health.c  | 67 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 69 insertions(+)
diff mbox series

Patch

diff --git a/include/net/devlink.h b/include/net/devlink.h
index 85739bb731c1..7f5b36554778 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -1268,6 +1268,7 @@  enum devlink_trap_group_generic_id {
 		u16 :		devlink_fmsg_u32_pair_put,	\
 		u32 :		devlink_fmsg_u32_pair_put,	\
 		u64 :		devlink_fmsg_u64_pair_put,	\
+		int :		devlink_fmsg_u32_pair_put,	\
 		char * :	devlink_fmsg_string_pair_put,	\
 		const char * :	devlink_fmsg_string_pair_put)	\
 	(fmsg, name, (value)))
@@ -2018,6 +2019,7 @@  int devlink_compat_switch_id_get(struct net_device *dev,
 
 int devlink_nl_port_handle_fill(struct sk_buff *msg, struct devlink_port *devlink_port);
 size_t devlink_nl_port_handle_size(struct devlink_port *devlink_port);
+void devlink_fmsg_dump_skb(struct devlink_fmsg *fmsg, const struct sk_buff *skb);
 
 #else
 
diff --git a/net/devlink/health.c b/net/devlink/health.c
index acb8c0e174bb..b98ca650284c 100644
--- a/net/devlink/health.c
+++ b/net/devlink/health.c
@@ -1241,3 +1241,70 @@  int devlink_nl_health_reporter_test_doit(struct sk_buff *skb,
 
 	return reporter->ops->test(reporter, info->extack);
 }
+
+/**
+ * devlink_fmsg_dump_skb - Dump sk_buffer structure
+ * @fmsg: devlink formatted message pointer
+ * @skb: pointer to skb
+ *
+ * Dump diagnostic information about sk_buff structure, like headroom, length,
+ * tailroom, MAC, etc.
+ */
+void devlink_fmsg_dump_skb(struct devlink_fmsg *fmsg, const struct sk_buff *skb)
+{
+	struct skb_shared_info *sh = skb_shinfo(skb);
+	struct sock *sk = skb->sk;
+	bool has_mac, has_trans;
+
+	has_mac = skb_mac_header_was_set(skb);
+	has_trans = skb_transport_header_was_set(skb);
+
+	devlink_fmsg_pair_nest_start(fmsg, "skb");
+	devlink_fmsg_obj_nest_start(fmsg);
+	devlink_fmsg_put(fmsg, "actual len", skb->len);
+	devlink_fmsg_put(fmsg, "head len", skb_headlen(skb));
+	devlink_fmsg_put(fmsg, "data len", skb->data_len);
+	devlink_fmsg_put(fmsg, "tail len", skb_tailroom(skb));
+	devlink_fmsg_put(fmsg, "MAC", has_mac ? skb->mac_header : -1);
+	devlink_fmsg_put(fmsg, "MAC len",
+			 has_mac ? skb_mac_header_len(skb) : -1);
+	devlink_fmsg_put(fmsg, "network hdr", skb->network_header);
+	devlink_fmsg_put(fmsg, "network hdr len",
+			 has_trans ? skb_network_header_len(skb) : -1);
+	devlink_fmsg_put(fmsg, "transport hdr",
+			 has_trans ? skb->transport_header : -1);
+	devlink_fmsg_put(fmsg, "csum", skb->csum);
+	devlink_fmsg_put(fmsg, "csum_ip_summed", (u8)skb->ip_summed);
+	devlink_fmsg_put(fmsg, "csum_complete_sw", !!skb->csum_complete_sw);
+	devlink_fmsg_put(fmsg, "csum_valid", !!skb->csum_valid);
+	devlink_fmsg_put(fmsg, "csum_level", (u8)skb->csum_level);
+	devlink_fmsg_put(fmsg, "sw_hash", !!skb->sw_hash);
+	devlink_fmsg_put(fmsg, "l4_hash", !!skb->l4_hash);
+	devlink_fmsg_put(fmsg, "proto", ntohs(skb->protocol));
+	devlink_fmsg_put(fmsg, "pkt_type", (u8)skb->pkt_type);
+	devlink_fmsg_put(fmsg, "iif", skb->skb_iif);
+
+	if (sk) {
+		devlink_fmsg_pair_nest_start(fmsg, "sk");
+		devlink_fmsg_obj_nest_start(fmsg);
+		devlink_fmsg_put(fmsg, "family", sk->sk_type);
+		devlink_fmsg_put(fmsg, "type", sk->sk_type);
+		devlink_fmsg_put(fmsg, "proto", sk->sk_protocol);
+		devlink_fmsg_obj_nest_end(fmsg);
+		devlink_fmsg_pair_nest_end(fmsg);
+	}
+
+	devlink_fmsg_obj_nest_end(fmsg);
+	devlink_fmsg_pair_nest_end(fmsg);
+
+	devlink_fmsg_pair_nest_start(fmsg, "shinfo");
+	devlink_fmsg_obj_nest_start(fmsg);
+	devlink_fmsg_put(fmsg, "tx_flags", sh->tx_flags);
+	devlink_fmsg_put(fmsg, "nr_frags", sh->nr_frags);
+	devlink_fmsg_put(fmsg, "gso_size", sh->gso_size);
+	devlink_fmsg_put(fmsg, "gso_type", sh->gso_type);
+	devlink_fmsg_put(fmsg, "gso_segs", sh->gso_segs);
+	devlink_fmsg_obj_nest_end(fmsg);
+	devlink_fmsg_pair_nest_end(fmsg);
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_dump_skb);