[PATCH RFC 20/24] nfs: new tracepoint in match_stateid operation

Jeff Layton
2024-03-15T16:54:11Z

Add new tracepoints in the NFSv4 match_stateid minorversion op that show
the info in both stateids.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
fs/nfs/nfs4proc.c | 4 ++++
fs/nfs/nfs4trace.h | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 60 insertions(+)

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 815996cb27fc..d518388bd0d6 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -10432,6 +10432,8 @@ nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
static bool nfs41_match_stateid(const nfs4_stateid *s1,
const nfs4_stateid *s2)
{
+ trace_nfs41_match_stateid(s1, s2);
+
if (s1->type != s2->type)
return false;

@@ -10449,6 +10451,8 @@ static bool nfs41_match_stateid(const nfs4_stateid *s1,
static bool nfs4_match_stateid(const nfs4_stateid *s1,
const nfs4_stateid *s2)
{
+ trace_nfs4_match_stateid(s1, s2);
+
return nfs4_stateid_match(s1, s2);
}

diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h
index e5adfb755dc7..f531728a5b4a 100644
--- a/fs/nfs/nfs4trace.h
+++ b/fs/nfs/nfs4trace.h
@@ -1467,6 +1467,62 @@ DECLARE_EVENT_CLASS(nfs4_inode_stateid_callback_event,
DEFINE_NFS4_INODE_STATEID_CALLBACK_EVENT(nfs4_cb_recall);
DEFINE_NFS4_INODE_STATEID_CALLBACK_EVENT(nfs4_cb_layoutrecall_file);

+#define show_stateid_type(type) \
+ __print_symbolic(type, \
+ { NFS4_INVALID_STATEID_TYPE, "INVALID" }, \
+ { NFS4_SPECIAL_STATEID_TYPE, "SPECIAL" }, \
+ { NFS4_OPEN_STATEID_TYPE, "OPEN" }, \
+ { NFS4_LOCK_STATEID_TYPE, "LOCK" }, \
+ { NFS4_DELEGATION_STATEID_TYPE, "DELEGATION" }, \
+ { NFS4_LAYOUT_STATEID_TYPE, "LAYOUT" }, \
+ { NFS4_PNFS_DS_STATEID_TYPE, "PNFS_DS" }, \
+ { NFS4_REVOKED_STATEID_TYPE, "REVOKED" })
+
+DECLARE_EVENT_CLASS(nfs4_match_stateid_event,
+ TP_PROTO(
+ const nfs4_stateid *s1,
+ const nfs4_stateid *s2
+ ),
+
+ TP_ARGS(s1, s2),
+
+ TP_STRUCT__entry(
+ __field(int, s1_seq)
+ __field(int, s2_seq)
+ __field(u32, s1_hash)
+ __field(u32, s2_hash)
+ __field(int, s1_type)
+ __field(int, s2_type)
+ ),
+
+ TP_fast_assign(
+ __entry->s1_seq = s1->seqid;
+ __entry->s1_hash = nfs_stateid_hash(s1);
+ __entry->s1_type = s1->type;
+ __entry->s2_seq = s2->seqid;
+ __entry->s2_hash = nfs_stateid_hash(s2);
+ __entry->s2_type = s2->type;
+ ),
+
+ TP_printk(
+ "s1=%s:%x:%u s2=%s:%x:%u",
+ show_stateid_type(__entry->s1_type),
+ __entry->s1_hash, __entry->s1_seq,
+ show_stateid_type(__entry->s2_type),
+ __entry->s2_hash, __entry->s2_seq
+ )
+);
+
+#define DEFINE_NFS4_MATCH_STATEID_EVENT(name) \
+ DEFINE_EVENT(nfs4_match_stateid_event, name, \
+ TP_PROTO( \
+ const nfs4_stateid *s1, \
+ const nfs4_stateid *s2 \
+ ), \
+ TP_ARGS(s1, s2))
+DEFINE_NFS4_MATCH_STATEID_EVENT(nfs41_match_stateid);
+DEFINE_NFS4_MATCH_STATEID_EVENT(nfs4_match_stateid);
+
DECLARE_EVENT_CLASS(nfs4_idmap_event,
TP_PROTO(
const char *name,

--
2.44.0