f2fs: add app/fs io stat
This patch enables inner app/fs io stats and introduces below virtual fs
nodes for exposing stats info:
/sys/fs/f2fs/<dev>/iostat_enable
/proc/fs/f2fs/<dev>/iostat_info
Signed-off-by: Chao Yu <yuchao0@huawei.com>
[Jaegeuk Kim: fix wrong stat assignment]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index c26a761..e3585cc 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -292,6 +292,7 @@
.type = DATA,
.op = REQ_OP_WRITE,
.op_flags = REQ_SYNC | REQ_PRIO,
+ .io_type = FS_DATA_IO,
};
pgoff_t last_idx = ULONG_MAX;
int err = 0;
@@ -823,6 +824,8 @@
submit_bio(bio);
list_move_tail(&dc->list, &dcc->wait_list);
__check_sit_bitmap(sbi, dc->start, dc->start + dc->len);
+
+ f2fs_update_iostat(sbi, FS_DISCARD, 1);
}
} else {
__remove_discard_cmd(sbi, dc);
@@ -2271,7 +2274,8 @@
}
}
-void write_meta_page(struct f2fs_sb_info *sbi, struct page *page)
+void write_meta_page(struct f2fs_sb_info *sbi, struct page *page,
+ enum iostat_type io_type)
{
struct f2fs_io_info fio = {
.sbi = sbi,
@@ -2290,6 +2294,8 @@
set_page_writeback(page);
f2fs_submit_page_write(&fio);
+
+ f2fs_update_iostat(sbi, io_type, F2FS_BLKSIZE);
}
void write_node_page(unsigned int nid, struct f2fs_io_info *fio)
@@ -2298,6 +2304,8 @@
set_summary(&sum, nid, 0, 0);
do_write_page(&sum, fio);
+
+ f2fs_update_iostat(fio->sbi, fio->io_type, F2FS_BLKSIZE);
}
void write_data_page(struct dnode_of_data *dn, struct f2fs_io_info *fio)
@@ -2311,13 +2319,22 @@
set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
do_write_page(&sum, fio);
f2fs_update_data_blkaddr(dn, fio->new_blkaddr);
+
+ f2fs_update_iostat(sbi, fio->io_type, F2FS_BLKSIZE);
}
int rewrite_data_page(struct f2fs_io_info *fio)
{
+ int err;
+
fio->new_blkaddr = fio->old_blkaddr;
stat_inc_inplace_blocks(fio->sbi);
- return f2fs_submit_page_bio(fio);
+
+ err = f2fs_submit_page_bio(fio);
+
+ f2fs_update_iostat(fio->sbi, fio->io_type, F2FS_BLKSIZE);
+
+ return err;
}
void __f2fs_replace_block(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,