Todd Kjos 44d8047f1d binder: use standard functions to allocate fds ... Binder uses internal fs interfaces to allocate and install fds: __alloc_fd __fd_install __close_fd get_files_struct put_files_struct These were used to support the passing of fds between processes as part of a transaction. The actual allocation and installation of the fds in the target process was handled by the sending process so the standard functions, alloc_fd() and fd_install() which assume task==current couldn't be used. This patch refactors this mechanism so that the fds are allocated and installed by the target process allowing the standard functions to be used. The sender now creates a list of fd fixups that contains the struct *file and the address to fixup with the new fd once it is allocated. This list is processed by the target process when the transaction is dequeued. A new error case is introduced by this change. If an async transaction with file descriptors cannot allocate new fds in the target (probably due to out of file descriptors), the transaction is discarded with a log message. In the old implementation this would have been detected in the sender context and failed prior to sending. Signed-off-by: Todd Kjos <tkjos@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-09-14 15:22:36 +02:00
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binder.c	binder: use standard functions to allocate fds	2018-09-14 15:22:36 +02:00
binder_alloc.c	android: binder: Rate-limit debug and userspace triggered err msgs	2018-08-08 11:05:47 +02:00
binder_alloc.h	android: binder: Check for errors in binder_alloc_shrinker_init().	2017-12-18 15:59:17 +01:00
binder_alloc_selftest.c	android: binder: Add global lru shrinker to binder	2017-08-28 16:47:17 +02:00
binder_trace.h	binder: use standard functions to allocate fds	2018-09-14 15:22:36 +02:00
Kconfig	binder: use standard functions to allocate fds	2018-09-14 15:22:36 +02:00
Makefile	android: binder: Add allocator selftest	2017-08-28 16:47:17 +02:00