Pavel Emelyanov <xemul@xxxxxxxxxxxxx> writes:
> Eric W. Biederman wrote:
>> Pavel Emelyanov <xemul@xxxxxxxxxxxxx> writes:
>>
>>>> +static struct inode *nsfd_mkinode(void)
>>>> +{
>>>> + struct inode *inode;
>>>> + inode = new_inode(nsfd_mnt->mnt_sb);
>>>> + if (!inode)
>>>> + return ERR_PTR(-ENOMEM);
>>>> +
>>>> + inode->i_fop = &nsfd_file_operations;
>>>> +
>>>> + /*
>>>> + * Mark the inode dirty from the very beginning,
>>>> + * that way it will never be moved to the dirty
>>>> + * list because mark_inode_dirty() will think that
>>>> + * it already _is_ on the dirty list.
>>>> + */
>>>> + inode->i_state = I_DIRTY;
>>>> + inode->i_mode = S_IRUSR | S_IWUSR;
>>>> + inode->i_uid = current_fsuid();
>>>> + inode->i_gid = current_fsgid();
>>>> + inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
>>>> + return inode;
>>>> +}
>>> Why not use anon inodes?
>>
>> Because you can't mount them anywhere.
>
> Worth changing them that way?
I don't think so. They keep all of their state in struct file. To be
usefully bind mounted you need to keep your state in the dentry or the
inode.
Ultimately what I have done is fix rootfs so it supports bind mounts and
used rootfs inodes.
Eric
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