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    Subject[PATCH -v3 0/8] file notification: fsnotify a unified file notification backend
    Date
    This patch series implements fsnotify a filesystem notification backend which
    should be the basis for dnotify, inotify, and eventually fanotify.

    This series only reimplements dnotify using the new fsnotify backend. If
    accepted I will do the work to port inotify as well. Currently struct inode
    goes from:

    #ifdef CONFIG_DNOTIFY
    unsigned long i_dnotify_mask; /* Directory notify events */
    struct dnotify_struct *i_dnotify; /* for directory notifications */
    #endif

    to:
    #ifdef CONFIG_FSNOTIFY
    unsigned long i_fsnotify_mask; /* all events this inode cares about */
    struct list_head i_fsnotify_mark_entries; /* fsnotify mark entries */
    spinlock_t i_fsnotify_lock; /* protect the entries list */
    #endif

    so the inode still grows, but the inotify fields will be dropped as well
    resulting in a smaller struct inode. These are all the fields fanotify will
    want as well.

    rwlocks have been completely dropped in favor of even smaller critical section
    spinlocks. i_lock is no longer used to protect dnotify information and
    instead the more specific i_fsnotify_lock is used.
    ---

    Eric Paris (8):
    dnotify: reimplement dnotify using fsnotify
    fsnotify: add in inode fsnotify markings
    fsnotify: add group priorities
    fsnotify: unified filesystem notification backend
    fsnotify: use the new open-exec hook for inotify and dnotify
    fsnotify: sys_execve and sys_uselib do not call into fsnotify
    fsnotify: pass a file instead of an inode to open, read, and write
    filesystem notification: create fs/notify to contain all fs notification


    fs/Kconfig | 39 --
    fs/Makefile | 5
    fs/compat.c | 5
    fs/dnotify.c | 194 --------
    fs/exec.c | 5
    fs/inode.c | 7
    fs/inotify.c | 911 --------------------------------------
    fs/inotify_user.c | 778 --------------------------------
    fs/nfsd/vfs.c | 4
    fs/notify/Kconfig | 14 +
    fs/notify/Makefile | 4
    fs/notify/dnotify/Kconfig | 11
    fs/notify/dnotify/Makefile | 1
    fs/notify/dnotify/dnotify.c | 400 +++++++++++++++++
    fs/notify/fsnotify.c | 104 ++++
    fs/notify/fsnotify.h | 99 ++++
    fs/notify/group.c | 150 ++++++
    fs/notify/inode_mark.c | 226 +++++++++
    fs/notify/inotify/Kconfig | 27 +
    fs/notify/inotify/Makefile | 2
    fs/notify/inotify/inotify.c | 911 ++++++++++++++++++++++++++++++++++++++
    fs/notify/inotify/inotify_user.c | 778 ++++++++++++++++++++++++++++++++
    fs/notify/notification.c | 188 ++++++++
    fs/open.c | 2
    fs/read_write.c | 8
    include/linux/dnotify.h | 21 -
    include/linux/fs.h | 7
    include/linux/fsnotify.h | 73 ++-
    include/linux/fsnotify_backend.h | 103 ++++
    29 files changed, 3100 insertions(+), 1977 deletions(-)
    delete mode 100644 fs/dnotify.c
    delete mode 100644 fs/inotify.c
    delete mode 100644 fs/inotify_user.c
    create mode 100644 fs/notify/Kconfig
    create mode 100644 fs/notify/Makefile
    create mode 100644 fs/notify/dnotify/Kconfig
    create mode 100644 fs/notify/dnotify/Makefile
    create mode 100644 fs/notify/dnotify/dnotify.c
    create mode 100644 fs/notify/fsnotify.c
    create mode 100644 fs/notify/fsnotify.h
    create mode 100644 fs/notify/group.c
    create mode 100644 fs/notify/inode_mark.c
    create mode 100644 fs/notify/inotify/Kconfig
    create mode 100644 fs/notify/inotify/Makefile
    create mode 100644 fs/notify/inotify/inotify.c
    create mode 100644 fs/notify/inotify/inotify_user.c
    create mode 100644 fs/notify/notification.c
    create mode 100644 include/linux/fsnotify_backend.h


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