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    SubjectRe: seq_file and exporting dynamically allocated data
    On Sat, Nov 15, 2003 at 05:18:44PM +0000, viro@parcelfarce.linux.theplanet.co.uk wrote:
    > On Sat, Nov 15, 2003 at 10:38:33AM +0100, Harald Welte wrote:
    > > that doesn't help. As I am aware, the seq_file structure is only
    > > allocated in the seq_open() call. How does seq_open() know which
    > > private data (i.e. hash table) to associate with struct file?
    >
    > Why should seq_open() know that? Its caller does and it can set the damn
    > thing to whatever it wants.

    So who is the caller? it's the ->open() member of struct
    file_operations. and struct file_operations doesn't have some private
    member where I could hide my pointer before saving it to
    seq_file.private in seq_open().

    > Wrong.

    Hm, maybe somebody could enlighten me then. Maybe this is a stupid
    qestion, but I wasn't able to figure that out after reading all the
    structures, etc.

    --
    - Harald Welte <laforge@netfilter.org> http://www.netfilter.org/
    ============================================================================
    "Fragmentation is like classful addressing -- an interesting early
    architectural error that shows how much experimentation was going
    on while IP was being designed." -- Paul Vixie
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