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f2fs: add tracepoint for f2fs_file_write_iter() 

This patch adds tracepoint for f2fs_file_write_iter().

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2019-04-02 18:52:22 +08:00 committed by Jaegeuk Kim
parent e1074d4b1d
commit 126ce7214d
2 changed files with 50 additions and 9 deletions
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28
fs/f2fs/file.c
View File

@ -3035,15 +3035,21 @@ 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);
}
@ -3066,7 +3072,8 @@ 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 {
@ -3077,7 +3084,8 @@ 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);
@ -3091,7 +3099,9 @@ 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;

31
include/trace/events/f2fs.h
View File

@ -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),