linux-toradex.git/include/linux/fanotify.h, branch tegra-10.11.4

fanotify: resize pid and reorder structure

2010-08-27T23:54:09+00:00

resize pid and reorder the fanotify_event_metadata so it is naturally
aligned and we can work towards dropping the packed attributed

Signed-off-by: Tvrtko Ursulin 
Cc: Andreas Dilger 
Signed-off-by: Eric Paris

fanotify: flush outstanding perm requests on group destroy

2010-08-23T00:28:16+00:00

When an fanotify listener is closing it may cause a deadlock between the
listener and the original task doing an fs operation.  If the original task
is waiting for a permissions response it will be holding the srcu lock.  The
listener cannot clean up and exit until after that srcu lock is syncronized.
Thus deadlock.  The fix introduced here is to stop accepting new permissions
events when a listener is shutting down and to grant permission for all
outstanding events.  Thus the original task will eventually release the srcu
lock and the listener can complete shutdown.

Reported-by: Andreas Gruenbacher 
Cc: Andreas Gruenbacher 
Signed-off-by: Eric Paris

fanotify: userspace interface for permission responses

2010-07-28T13:59:02+00:00

fanotify groups need to respond to events which include permissions types.
To do so groups will send a response using write() on the fanotify_fd they
have open.

Signed-off-by: Eric Paris

fanotify: permissions and blocking

2010-07-28T13:59:02+00:00

This is the backend work needed for fanotify to support the new
FS_OPEN_PERM and FS_ACCESS_PERM fsnotify events.  This is done using the
new fsnotify secondary queue.  No userspace interface is provided actually
respond to or request these events.

Signed-off-by: Eric Paris

fanotify: clear all fanotify marks

2010-07-28T13:59:00+00:00

fanotify listeners may want to clear all marks.  They may want to do this
to destroy all of their inode marks which have nothing but ignores.
Realistically this is useful for av vendors who update policy and want to
clear all of their cached allows.

Signed-off-by: Eric Paris

fanotify: allow ignored_masks to survive modify

2010-07-28T13:59:00+00:00

Some users may want to truely ignore an inode even if it has been modified.
Say you are wanting a mount which contains a log file and you really don't
want any notification about that file.  This patch allows the listener to
do that.

Signed-off-by: Eric Paris

fanotify: allow users to set an ignored_mask

2010-07-28T13:59:00+00:00

Change the sys_fanotify_mark() system call so users can set ignored_masks
on inodes.  Remember, if a user new sets a real mask, and only sets ignored
masks, the ignore will never be pinned in memory.  Thus ignored_masks can
be lost under memory pressure and the user may again get events they
previously thought were ignored.

Signed-off-by: Eric Paris

fanotify: remove fanotify.h declarations

2010-07-28T13:58:59+00:00

fanotify_mark_validate functions are all needlessly declared in headers as
static inlines.  Instead just do the checks where they are needed for code
readability.

Signed-off-by: Andreas Gruenbacher 
Signed-off-by: Eric Paris

fanotify: rename FAN_MARK_ON_VFSMOUNT to FAN_MARK_MOUNT

2010-07-28T13:58:59+00:00

the term 'vfsmount' isn't sensicle to userspace.  instead call is 'mount.

Signed-off-by: Andreas Gruenbacher 
Signed-off-by: Eric Paris

fanotify: hooks the fanotify_mark syscall to the vfsmount code

2010-07-28T13:58:59+00:00

Create a new fanotify_mark flag which indicates we should attach the mark
to the vfsmount holding the object referenced by dfd and pathname rather
than the inode itself.

Signed-off-by: Eric Paris