[PATCH v13 4/8] netfs: trace: Rejig a couple of the tracepoints

[David Howells <dhowells@redhat.com>]

Rejig the following tracepoints:

 (1) Change netfs_folio to show the pfn.

 (2) Change netfs_collect_folio to show a folio index range rather than
     file position range and don't show the cleaned_to or collected_to
     points.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Paulo Alcantara <pc@manguebit.org>
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
---
 fs/netfs/read_collect.c      |  2 +-
 fs/netfs/read_pgpriv2.c      |  2 +-
 fs/netfs/write_collect.c     |  2 +-
 include/trace/events/netfs.h | 23 ++++++++++-------------
 4 files changed, 13 insertions(+), 16 deletions(-)

diff --git a/fs/netfs/read_collect.c b/fs/netfs/read_collect.c
index 6576a9b8671d..61f2664de6d3 100644
--- a/fs/netfs/read_collect.c
+++ b/fs/netfs/read_collect.c
@@ -192,7 +192,7 @@ static void netfs_read_unlock_folios(struct netfs_io_request *rreq,
 		fpos = folio_pos(folio);
 		fend = fpos + fsize;
 
-		trace_netfs_collect_folio(rreq, folio, fend, collected_to);
+		trace_netfs_collect_folio(rreq, folio);
 
 		/* Unlock any folio we've transferred all of. */
 		if (collected_to < fend)
diff --git a/fs/netfs/read_pgpriv2.c b/fs/netfs/read_pgpriv2.c
index 4d50585f69a6..bf4d9d6877d7 100644
--- a/fs/netfs/read_pgpriv2.c
+++ b/fs/netfs/read_pgpriv2.c
@@ -201,7 +201,7 @@ bool netfs_pgpriv2_unlock_copied_folios(struct netfs_io_request *creq)
 
 		fend = min_t(uoff_t, fpos + flen, creq->i_size);
 
-		trace_netfs_collect_folio(creq, folio, fend, collected_to);
+		trace_netfs_collect_folio(creq, folio);
 
 		/* Unlock any folio we've transferred all of. */
 		if (collected_to < fend)
diff --git a/fs/netfs/write_collect.c b/fs/netfs/write_collect.c
index 6114bdf27ce0..7194182b975c 100644
--- a/fs/netfs/write_collect.c
+++ b/fs/netfs/write_collect.c
@@ -156,7 +156,7 @@ static void netfs_writeback_unlock_folios(struct netfs_io_request *wreq,
 
 		fend = min_t(uoff_t, fpos + flen, wreq->i_size);
 
-		trace_netfs_collect_folio(wreq, folio, fend, collected_to);
+		trace_netfs_collect_folio(wreq, folio);
 
 		/* Unlock any folio we've transferred all of. */
 		if (collected_to < fend)
diff --git a/include/trace/events/netfs.h b/include/trace/events/netfs.h
index 2491a0bc4179..21a661cd1ca4 100644
--- a/include/trace/events/netfs.h
+++ b/include/trace/events/netfs.h
@@ -497,6 +497,7 @@ TRACE_EVENT(netfs_folio,
 	    TP_STRUCT__entry(
 		    __field(u64,			ino)
 		    __field(pgoff_t,			index)
+		    __field(unsigned long,		pfn)
 		    __field(unsigned int,		nr)
 		    __field(enum netfs_folio_trace,	why)
 			     ),
@@ -507,9 +508,11 @@ TRACE_EVENT(netfs_folio,
 		    __entry->why = why;
 		    __entry->index = folio->index;
 		    __entry->nr = folio_nr_pages(folio);
+		    __entry->pfn = folio_pfn(folio);
 			   ),
 
-	    TP_printk("i=%05llx ix=%05lx-%05lx %s",
+	    TP_printk("p=%lx i=%05llx ix=%05lx-%05lx %s",
+		      __entry->pfn,
 		      __entry->ino, __entry->index, __entry->index + __entry->nr - 1,
 		      __print_symbolic(__entry->why, netfs_folio_traces))
 	    );
@@ -656,31 +659,25 @@ TRACE_EVENT(netfs_collect_sreq,
 
 TRACE_EVENT(netfs_collect_folio,
 	    TP_PROTO(const struct netfs_io_request *wreq,
-		     const struct folio *folio,
-		     uoff_t fend, uoff_t collected_to),
+		     const struct folio *folio),
 
-	    TP_ARGS(wreq, folio, fend, collected_to),
+	    TP_ARGS(wreq, folio),
 
 	    TP_STRUCT__entry(
 		    __field(unsigned int,	wreq)
 		    __field(unsigned long,	index)
-		    __field(uoff_t,		fend)
-		    __field(uoff_t,		cleaned_to)
-		    __field(uoff_t,		collected_to)
+		    __field(unsigned int,	nr)
 			     ),
 
 	    TP_fast_assign(
 		    __entry->wreq	= wreq->debug_id;
 		    __entry->index	= folio->index;
-		    __entry->fend	= fend;
-		    __entry->cleaned_to	= wreq->cleaned_to;
-		    __entry->collected_to = collected_to;
+		    __entry->nr		= folio_nr_pages(folio);
 			   ),
 
-	    TP_printk("R=%08x ix=%05lx r=%llx-%llx t=%llx/%llx",
+	    TP_printk("R=%08x ix=%05lx-%05lx",
 		      __entry->wreq, __entry->index,
-		      (uoff_t)__entry->index * PAGE_SIZE, __entry->fend,
-		      __entry->cleaned_to, __entry->collected_to)
+		      __entry->index + __entry->nr - 1)
 	    );
 
 TRACE_EVENT(netfs_collect_state,