Unverified Commit bcb33f79 authored by David Howells's avatar David Howells Committed by Christian Brauner
Browse files

cachefiles: Add some subrequest tracepoints 



Add some tracepoints into the cachefiles write paths.

Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/20241216204124.3752367-16-dhowells@redhat.com


cc: netfs@lists.linux.dev
Signed-off-by: default avatarChristian Brauner <brauner@kernel.org>
parent 30f878fa

fs/cachefiles/io.c

+4 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 
#include <linux/falloc.h>

#include <linux/sched/mm.h>

#include <trace/events/fscache.h>

#include <trace/events/netfs.h>

#include "internal.h"



struct cachefiles_kiocb {
@@ -366,6 +367,7 @@ static int cachefiles_write(struct netfs_cache_resources *cres, 
	if (!fscache_wait_for_operation(cres, FSCACHE_WANT_WRITE)) {

		if (term_func)

			term_func(term_func_priv, -ENOBUFS, false);

		trace_netfs_sreq(term_func_priv, netfs_sreq_trace_cache_nowrite);

		return -ENOBUFS;

	}
@@ -695,6 +697,7 @@ static void cachefiles_issue_write(struct netfs_io_subrequest *subreq) 
		iov_iter_truncate(&subreq->io_iter, len);

	}



	trace_netfs_sreq(subreq, netfs_sreq_trace_cache_prepare);

	cachefiles_begin_secure(cache, &saved_cred);

	ret = __cachefiles_prepare_write(object, cachefiles_cres_file(cres),

					 &start, &len, len, true);
@@ -704,6 +707,7 @@ static void cachefiles_issue_write(struct netfs_io_subrequest *subreq) 
		return;

	}



	trace_netfs_sreq(subreq, netfs_sreq_trace_cache_write);

	cachefiles_write(&subreq->rreq->cache_resources,

			 subreq->start, &subreq->io_iter,

			 netfs_write_subrequest_terminated, subreq);

include/trace/events/netfs.h

+3 −0
Original line number Diff line number Diff line
@@ -74,6 +74,9 @@ 
#define netfs_sreq_traces					\

	EM(netfs_sreq_trace_add_donations,	"+DON ")	\

	EM(netfs_sreq_trace_added,		"ADD  ")	\

	EM(netfs_sreq_trace_cache_nowrite,	"CA-NW")	\

	EM(netfs_sreq_trace_cache_prepare,	"CA-PR")	\

	EM(netfs_sreq_trace_cache_write,	"CA-WR")	\

	EM(netfs_sreq_trace_clear,		"CLEAR")	\

	EM(netfs_sreq_trace_discard,		"DSCRD")	\

	EM(netfs_sreq_trace_donate_to_prev,	"DON-P")	\