linux/fs/notify
Eric Paris 4231a23530 fanotify: implement fanotify listener ordering
The fanotify listeners needs to be able to specify what types of operations
they are going to perform so they can be ordered appropriately between other
listeners doing other types of operations.  They need this to be able to make
sure that things like hierarchichal storage managers will get access to inodes
before processes which need the data.  This patch defines 3 possible uses
which groups must indicate in the fanotify_init() flags.

FAN_CLASS_PRE_CONTENT
FAN_CLASS_CONTENT
FAN_CLASS_NOTIF

Groups will receive notification in that order.  The order between 2 groups in
the same class is undeterministic.

FAN_CLASS_PRE_CONTENT is intended to be used by listeners which need access to
the inode before they are certain that the inode contains it's final data.  A
hierarchical storage manager should choose to use this class.

FAN_CLASS_CONTENT is intended to be used by listeners which need access to the
inode after it contains its intended contents.  This would be the appropriate
level for an AV solution or document control system.

FAN_CLASS_NOTIF is intended for normal async notification about access, much the
same as inotify and dnotify.  Syncronous permissions events are not permitted
at this class.

Signed-off-by: Eric Paris <eparis@redhat.com>
2010-10-28 17:22:13 -04:00
..
dnotify fanotify: use both marks when possible 2010-07-28 10:18:55 -04:00
fanotify fanotify: implement fanotify listener ordering 2010-10-28 17:22:13 -04:00
inotify llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
fsnotify.c fsnotify: use dget_parent 2010-10-25 21:26:14 -04:00
fsnotify.h fsnotify: remove global fsnotify groups lists 2010-07-28 10:18:54 -04:00
group.c fsnotify: remove global fsnotify groups lists 2010-07-28 10:18:54 -04:00
inode_mark.c fsnotify: implement ordering between notifiers 2010-10-28 17:22:13 -04:00
Kconfig fanotify: allow fanotify to be built 2010-10-28 17:22:13 -04:00
Makefile fsnotify: vfsmount marks generic functions 2010-07-28 09:58:57 -04:00
mark.c fsnotify: remove global fsnotify groups lists 2010-07-28 10:18:54 -04:00
notification.c Revert "fsnotify: store struct file not struct path" 2010-08-12 14:23:04 -07:00
vfsmount_mark.c fsnotify: implement ordering between notifiers 2010-10-28 17:22:13 -04:00