> I think this is a bug although of course it might be a case of us simply
> not supporting this.
>
> mount -o remount,ro /some/loopfile/based/mount
>
> I get
> ioctl: LOOP_SET_FD: Device or resource busy
Look at what it's doing - you'll probably find that it's a mount bug,
rather than a kernel one.
strace it and you'll probably find it trying to change the loop device
fd.
This:
--- loop.c.orig Wed Mar 3 20:35:13 1999
+++ loop.c Wed Mar 3 20:39:13 1999
@@ -344,14 +344,15 @@
MOD_INC_USE_COUNT;
- error = -EBUSY;
- if (lo->lo_dentry)
- goto out;
-
error = -EBADF;
file = fget(arg);
if (!file)
goto out;
+
+ if (lo->lo_dentry) {
+ error = (lo->lo_dentry->d_inode == file->f_dentry->d_inode) ? 0 : -EBUSY;
+ goto out;
+ }
error = -EINVAL;
inode = file->f_dentry->d_inode;
might be an acceptable workaround, though.
Matthew.
-
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