This patch adds tracepoint for f2fs_file_write_iter().
Signed-off-by: Chao Yu <yuch...@huawei.com>
---
fs/f2fs/file.c | 28 +++++++++++++++++++---------
include/trace/events/f2fs.h | 31 +++++++++++++++++++++++++++++++
2 files changed, 50 insertions(+), 9 deletions(-)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 578486e03427..65e14ec7366f 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -3037,15 +3037,21 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb,
struct iov_iter *from)
struct inode *inode = file_inode(file);
ssize_t ret;
- if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
- return -EIO;
+ if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) {
+ ret = -EIO;
+ goto out;
+ }
- if ((iocb->ki_flags & IOCB_NOWAIT) && !(iocb->ki_flags & IOCB_DIRECT))
- return -EINVAL;
+ if ((iocb->ki_flags & IOCB_NOWAIT) && !(iocb->ki_flags & IOCB_DIRECT)) {
+ ret = -EINVAL;
+ goto out;
+ }
if (!inode_trylock(inode)) {
- if (iocb->ki_flags & IOCB_NOWAIT)
- return -EAGAIN;
+ if (iocb->ki_flags & IOCB_NOWAIT) {
+ ret = -EAGAIN;
+ goto out;
+ }
inode_lock(inode);
}
@@ -3068,7 +3074,8 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb,
struct iov_iter *from)
clear_inode_flag(inode,
FI_NO_PREALLOC);
inode_unlock(inode);
- return -EAGAIN;
+ ret = -EAGAIN;
+ goto out;
}
} else {
@@ -3079,7 +3086,8 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb,
struct iov_iter *from)
if (err) {
clear_inode_flag(inode, FI_NO_PREALLOC);
inode_unlock(inode);
- return err;
+ ret = err;
+ goto out;
}
}
ret = __generic_file_write_iter(iocb, from);
@@ -3093,7 +3101,9 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb,
struct iov_iter *from)
f2fs_update_iostat(F2FS_I_SB(inode), APP_WRITE_IO, ret);
}
inode_unlock(inode);
-
+out:
+ trace_f2fs_file_write_iter(inode, iocb->ki_pos,
+ iov_iter_count(from), ret);
if (ret > 0)
ret = generic_write_sync(iocb, ret);
return ret;
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 1b39b50511f5..9d63457c1232 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -533,6 +533,37 @@ TRACE_EVENT(f2fs_truncate_partial_nodes,
__entry->err)
);
+TRACE_EVENT(f2fs_file_write_iter,
+
+ TP_PROTO(struct inode *inode, unsigned long offset,
+ unsigned long length, int ret),
+
+ TP_ARGS(inode, offset, length, ret),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(ino_t, ino)
+ __field(unsigned long, offset)
+ __field(unsigned long, length)
+ __field(int, ret)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->offset = offset;
+ __entry->length = length;
+ __entry->ret = ret;
+ ),
+
+ TP_printk("dev = (%d,%d), ino = %lu, "
+ "offset = %lu, length = %lu, written(err) = %d",
+ show_dev_ino(__entry),
+ __entry->offset,
+ __entry->length,
+ __entry->ret)
+);
+
TRACE_EVENT(f2fs_map_blocks,
TP_PROTO(struct inode *inode, struct f2fs_map_blocks *map, int ret),
--
2.18.0.rc1
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