From: Aihua Zhang <zhangaihua1@xxxxxxxxxx>
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 <zhangaihua1@xxxxxxxxxx>
---
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
--
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