From: Aihua Zhang <zhangaih...@huawei.com> I wrote a testcase to truncate a bin file while it is running at overlayfs. the result as below:
Bus error (core dumped) I think it's not appropriate for filesystem, and fixed it by this patch. after the patch, result as below: status:-1 errno:26 ETXTBSY:26 PASS This is because the inode is not correct ,it should point to overlayfs rather than the upper filesystem. Signed-off-by: Aihua Zhang <zhangaih...@huawei.com> --- include/linux/fs.h | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/include/linux/fs.h b/include/linux/fs.h index dd28814..54fdbf9 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2589,7 +2589,7 @@ static inline int get_write_access(struct inode *inode) } static inline int deny_write_access(struct file *file) { - struct inode *inode = file_inode(file); + struct inode *inode = d_inode(file->f_path.dentry); return atomic_dec_unless_positive(&inode->i_writecount) ? 0 : -ETXTBSY; } static inline void put_write_access(struct inode * inode) -- 1.7.1