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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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