X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=fs%2Fmpage.c;h=5c65d8942692fd468558c9cac0052216af75a2bb;hb=3a03958f9653c232ed1239691f412b856dc89a9b;hp=1480d3a180370fe3922a7724e613d09b896f9d00;hpb=923f1cbf2e45f6292a01de959031a8efeabede78;p=firefly-linux-kernel-4.4.55.git

diff --git a/fs/mpage.c b/fs/mpage.c
index 1480d3a18037..5c65d8942692 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -30,6 +30,14 @@
 #include <linux/cleancache.h>
 #include "internal.h"
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/android_fs.h>
+
+EXPORT_TRACEPOINT_SYMBOL(android_fs_datawrite_start);
+EXPORT_TRACEPOINT_SYMBOL(android_fs_datawrite_end);
+EXPORT_TRACEPOINT_SYMBOL(android_fs_dataread_start);
+EXPORT_TRACEPOINT_SYMBOL(android_fs_dataread_end);
+
 /*
  * I/O completion handler for multipage BIOs.
  *
@@ -47,6 +55,16 @@ static void mpage_end_io(struct bio *bio)
 	struct bio_vec *bv;
 	int i;
 
+	if (trace_android_fs_dataread_end_enabled() &&
+	    (bio_data_dir(bio) == READ)) {
+		struct page *first_page = bio->bi_io_vec[0].bv_page;
+
+		if (first_page != NULL)
+			trace_android_fs_dataread_end(first_page->mapping->host,
+						      page_offset(first_page),
+						      bio->bi_iter.bi_size);
+	}
+
 	bio_for_each_segment_all(bv, bio, i) {
 		struct page *page = bv->bv_page;
 		page_endio(page, bio_data_dir(bio), bio->bi_error);
@@ -57,6 +75,18 @@ static void mpage_end_io(struct bio *bio)
 
 static struct bio *mpage_bio_submit(int rw, struct bio *bio)
 {
+	if (trace_android_fs_dataread_start_enabled() && (rw == READ)) {
+		struct page *first_page = bio->bi_io_vec[0].bv_page;
+
+		if (first_page != NULL) {
+			trace_android_fs_dataread_start(
+				first_page->mapping->host,
+				page_offset(first_page),
+				bio->bi_iter.bi_size,
+				current->pid,
+				current->comm);
+		}
+	}
 	bio->bi_end_io = mpage_end_io;
 	guard_bio_eod(rw, bio);
 	submit_bio(rw, bio);