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    SubjectRe: The argument for fs assistance in handling archives (was: silent semantic changes with reiser4)


    On Thu, 2 Sep 2004, Alan Cox wrote:
    >
    > I asked our desktop people. They want something like inotify because
    > dontify doesn't cut it.

    Well, dnotify() really _is_ inotify(), since it does actually work on
    inodes, not dentries.

    I think what they are really complaining about is that dnotify() only
    notifies the _directory_ when a file is changed, and they'd like it to
    notify the file itself too. Which is a one-liner, really.

    Does the following make sense? (Totally untested, use-at-your-own-risk,
    I've-never-actually-used-dnotify-in-user-space, whatever).

    Linus

    ===== fs/dnotify.c 1.17 vs edited =====
    --- 1.17/fs/dnotify.c 2004-08-09 18:45:22 -07:00
    +++ edited/fs/dnotify.c 2004-09-02 13:21:26 -07:00
    @@ -160,6 +160,8 @@
    if (!dir_notify_enable)
    return;

    + __inode_dir_notify(dentry->d_inode, event);
    +
    spin_lock(&dentry->d_lock);
    parent = dentry->d_parent;
    if (parent->d_inode->i_dnotify_mask & event) {
    -
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