Patchless linuxmodule and more recent version of linux support #11
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When device status changes (e.g. link bounce), if dev->br_port is not null linux bridge's br_device_event will refer to dev->br_port. But dev->br_port is a invalid pointer to linux bridge as it's fake_bridge which was allocated by FromDevice. To make linux bridge happy, set br_port to null with early notification handler and set it again with late notification handler again. Note: this fix is under *not* ideal assumption as it assumes br_device_notifier's prioriy is higher than INT_MIN and less than INT_MAX. Signed-off-by: Joonwoo Park <joonwpark81@gmail.com>
Use per_cpu super_blocks.s_files. Also use kzalloc to zero initialize newfs. Recent linux calls file_system_type.mount if it's not null. Signed-off-by: Joonwoo Park <joonwpark81@gmail.com>
Linux net has removed function pointers which had used for intercepting packet from protocol handlers/pesudo devices like bridge and introduced netdev_rx_handler_register() instead. Subsequently br_handle_frame_hook is not available anymore. For patchless linux, use netdev_rx_handler_register(). Signed-off-by: Joonwoo Park <joonwpark81@gmail.com>
As of linux 2.6.36 file_operations.ioctl has removed. Bobby Longpocket <bobbylongpocket@yahoo.com> pointed out different interface between ioctl and unlocked_ioctl Signed-off-by: Joonwoo Park <joonwpark81@gmail.com>
Signed-off-by: Joonwoo Park <joonwpark81@gmail.com>
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Subject: [PATCH 1/5] FromDevice: avoid kernel panic on device status change.
Subject: [PATCH 2/5] proclikefs: use per_cpu super_block.s_files
Subject: [PATCH 3/5] FromDevice: use netdev_rx_handler_register
Subject: [PATCH 4/5] clickfs: use unlocked_ioctl on linux 2.6.36+
Subject: [PATCH 5/5] ToUserDevice: use unlocked_ioctl if it's available