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This serie is another one of the v2 patchset[1] which are here split into six patches. Besides, this patch is made on top of the previous serie[2] I submitted some time ago. [1] Link: https://lore.kernel.org/all/20240209061213.72152-3-kerneljasonxing@gmail.com/ [2] Link: https://lore.kernel.org/all/20240212052513.37914-1-kerneljasonxing@gmail.com/ v3: Link: https://lore.kernel.org/all/CANn89iK40SoyJ8fS2U5kp3pDruo=zfQNPL-ppOF+LYaS9z-MVA@mail.gmail.com/ 1. Split that patch into some smaller ones as suggested by Eric. v2: Link: https://lore.kernel.org/all/20240204104601.55760-1-kerneljasonxing@gmail.com/ 1. change the title of 2/2 patch. 2. fix some warnings checkpatch tool showed before. 3. use return value instead of adding more parameters suggested by Eric. Jason Xing (6): tcp: introduce another three dropreasons in receive path tcp: add more specific possible drop reasons in tcp_rcv_synsent_state_process() tcp: add dropreasons in tcp_rcv_state_process() tcp: make the dropreason really work when calling tcp_rcv_state_process() tcp: make dropreason in tcp_child_process() work tcp: get rid of NOT_SEPCIFIED reason in tcp_v4/6_do_rcv include/net/dropreason-core.h | 22 +++++++++++++++++++++- include/net/tcp.h | 4 ++-- net/ipv4/tcp_input.c | 28 +++++++++++++++++++--------- net/ipv4/tcp_ipv4.c | 20 ++++++++++++-------- net/ipv4/tcp_minisocks.c | 9 +++++---- net/ipv6/tcp_ipv6.c | 20 ++++++++++++-------- 6 files changed, 71 insertions(+), 32 deletions(-)