diff options
Diffstat (limited to 'fs/file_table.c')
| -rw-r--r-- | fs/file_table.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/file_table.c b/fs/file_table.c index 3f73eb1..71efc70 100644 --- a/fs/file_table.c +++ b/fs/file_table.c @@ -199,6 +199,17 @@ int init_file(struct file *file, struct vfsmount *mnt, struct dentry *dentry, file->f_mapping = dentry->d_inode->i_mapping; file->f_mode = mode; file->f_op = fop; + + /* + * These mounts don't really matter in practice + * for r/o bind mounts. They aren't userspace- + * visible. We do this for consistency, and so + * that we can do debugging checks at __fput() + */ + if ((mode & FMODE_WRITE) && !special_file(dentry->d_inode->i_mode)) { + error = mnt_want_write(mnt); + WARN_ON(error); + } return error; } EXPORT_SYMBOL(init_file); @@ -221,10 +232,13 @@ EXPORT_SYMBOL(fput); */ void drop_file_write_access(struct file *file) { + struct vfsmount *mnt = file->f_path.mnt; struct dentry *dentry = file->f_path.dentry; struct inode *inode = dentry->d_inode; put_write_access(inode); + if (!special_file(inode->i_mode)) + mnt_drop_write(mnt); } EXPORT_SYMBOL_GPL(drop_file_write_access); |