>In the Linux proc filesystem, /proc/[pid]/fd is a link to the
>actually the actual pathname of the opened file.
>
>I am curious how Linux convert an fd to the pathname? Does it
>recursively walk back from current dentry to the root?
AFAICS the fd has a pointer to the vma of the file (don't ask me why),
which in turn has a 'struct file' pointer, which in turn has the
required 'struct dentry' in it.
Jan
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