ANDROID: f2fs: Complement "android_fs" tracepoint of read path

It's only in DIO before, complement for BIO.

Bug: 120445624
Change-Id: I90b6fb15e355978da8805ed6306c595819be989d
Signed-off-by: Peng Zhou <peng.zhou@mediatek.com>

1 files changed, 40 insertions, 5 deletions

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 221306b22947..8f7d8f7f8f0a 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -142,6 +142,8 @@ static bool f2fs_bio_post_read_required(struct bio *bio)
 
 static void f2fs_read_end_io(struct bio *bio)
 {
+	struct page *first_page = bio->bi_io_vec[0].bv_page;
+
 	if (time_to_inject(F2FS_P_SB(bio->bi_io_vec->bv_page), FAULT_READ_IO)) {
 		f2fs_show_injection_info(FAULT_READ_IO);
 		bio->bi_error = -EIO;
@@ -155,6 +157,13 @@ static void f2fs_read_end_io(struct bio *bio)
 		return;
 	}
 
+	if (first_page != NULL &&
+		__read_io_type(first_page) == F2FS_RD_DATA) {
+		trace_android_fs_dataread_end(first_page->mapping->host,
+						page_offset(first_page),
+						bio->bi_iter.bi_size);
+	}
+
 	__read_end_io(bio);
 }
 
@@ -321,6 +330,32 @@ submit_io:
 	submit_bio(bio);
 }
 
+static void __f2fs_submit_read_bio(struct f2fs_sb_info *sbi,
+				struct bio *bio, enum page_type type)
+{
+	if (trace_android_fs_dataread_start_enabled() && (type == DATA)) {
+		struct page *first_page = bio->bi_io_vec[0].bv_page;
+
+		if (first_page != NULL &&
+			__read_io_type(first_page) == F2FS_RD_DATA) {
+			char *path, pathbuf[MAX_TRACE_PATHBUF_LEN];
+
+			path = android_fstrace_get_pathname(pathbuf,
+						MAX_TRACE_PATHBUF_LEN,
+						first_page->mapping->host);
+
+			trace_android_fs_dataread_start(
+				first_page->mapping->host,
+				page_offset(first_page),
+				bio->bi_iter.bi_size,
+				current->pid,
+				path,
+				current->comm);
+		}
+	}
+	__submit_bio(sbi, bio, type);
+}
+
 static void __submit_merged_bio(struct f2fs_bio_info *io)
 {
 	struct f2fs_io_info *fio = &io->fio;
@@ -468,7 +503,7 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio)
 	inc_page_count(fio->sbi, is_read_io(fio->op) ?
 			__read_io_type(page): WB_DATA_TYPE(fio->page));
 
-	__submit_bio(fio->sbi, bio, fio->type);
+	__f2fs_submit_read_bio(fio->sbi, bio, fio->type);
 	return 0;
 }
 
@@ -598,7 +633,7 @@ static int f2fs_submit_page_read(struct inode *inode, struct page *page,
 	}
 	ClearPageError(page);
 	inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
-	__submit_bio(F2FS_I_SB(inode), bio, DATA);
+	__f2fs_submit_read_bio(F2FS_I_SB(inode), bio, DATA);
 	return 0;
 }
 
@@ -1598,7 +1633,7 @@ got_it:
 		if (bio && (last_block_in_bio != block_nr - 1 ||
 			!__same_bdev(F2FS_I_SB(inode), block_nr, bio))) {
 submit_and_realloc:
-			__submit_bio(F2FS_I_SB(inode), bio, DATA);
+			__f2fs_submit_read_bio(F2FS_I_SB(inode), bio, DATA);
 			bio = NULL;
 		}
 		if (bio == NULL) {
@@ -1630,7 +1665,7 @@ set_error_page:
 		goto next_page;
 confused:
 		if (bio) {
-			__submit_bio(F2FS_I_SB(inode), bio, DATA);
+			__f2fs_submit_read_bio(F2FS_I_SB(inode), bio, DATA);
 			bio = NULL;
 		}
 		unlock_page(page);
@@ -1640,7 +1675,7 @@ next_page:
 	}
 	BUG_ON(pages && !list_empty(pages));
 	if (bio)
-		__submit_bio(F2FS_I_SB(inode), bio, DATA);
+		__f2fs_submit_read_bio(F2FS_I_SB(inode), bio, DATA);
 	return 0;
 }