From de5307e46d28aa26ffd6f2048398b6303e134a67 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Mon, 11 Apr 2016 11:51:51 -0700 Subject: [PATCH] f2fs: fix dropping inmemory pages in a wrong time When one reader closes its file while the other writer is doing atomic writes, f2fs_release_file drops atomic data resulting in an empty commit. This patch fixes this wrong commit problem by checking openess of the file. Process0 Process1 open file start atomic write write data read data close file f2fs_release_file() clear atomic data commit atomic write Reported-by: Miao Xie Signed-off-by: Jaegeuk Kim --- fs/f2fs/file.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 90d1157a09f9..e10eb61d9f62 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -1254,6 +1254,14 @@ out: static int f2fs_release_file(struct inode *inode, struct file *filp) { + /* + * f2fs_relase_file is called at every close calls. So we should + * not drop any inmemory pages by close called by other process. + */ + if (!(filp->f_mode & FMODE_WRITE) || + atomic_read(&inode->i_writecount) != 1) + return 0; + /* some remained atomic pages should discarded */ if (f2fs_is_atomic_file(inode)) drop_inmem_pages(inode); -- 2.39.5