From: Jonathan Lemon <b...@fb.com> This is set of cleanup patches for zerocopy which are intended to allow a introduction of a different zerocopy implementation.
The top level API will use the skb_zcopy_*() functions, while the current TCP specific zerocopy ends up using msg_zerocopy_*() calls. There should be no functional changes from these patches. v1->v2: Break changes to skb_zcopy_put into 3 patches, in order to make it easier to follow the changes. Add Willem's suggestion about renaming sock_zerocopy_ Patch 1: Move zerocopy bits from tx_flags into zc_flags for clarity. These bits will be used in the RX path in the future. Patch 2: remove dead function Patch 3: simplify sock_zerocopy_put Patch 4: push status/refcounts into sock_zerocopy_callback Patch 5: replace sock_zerocopy_put with skb_zcopy_put Patch 6: rename sock_zerocopy_get Patch 7: Add an optional skb parameter to callback, allowing access to the attached skb from the callback. Patch 8: Add skb_zcopy_put_abort, and move zerocopy logic into the callback function. There unfortunately is still a check against the callback type here. Patch 9: Set the skb zc_flags from the ubuf being attached, instead of a fixed value, allowing different initialization types. Patch 10: Replace open-coded assignments Patch 11: Relocate skb_zcopy_clear() in skb_release_data() Patch 12: rename sock_zerocopy_ to msg_zerocpy_ Jonathan Lemon (12): net: group skb_shinfo zerocopy related bits together. skbuff: remove unused skb_zcopy_abort function skbuff: simplify sock_zerocopy_put skbuff: Push status and refcounts into sock_zerocopy_callback skbuff: replace sock_zerocopy_put() with skb_zcopy_put() skbuff: replace sock_zerocopy_get with skb_zcopy_get skbuff: Add skb parameter to the ubuf zerocopy callback skbuff: Call sock_zerocopy_put_abort from skb_zcopy_put_abort skbuff: add zc_flags to ubuf_info for ubuf setup tap/tun: use skb_zcopy_set() instead of open coded assignment skbuff: Call skb_zcopy_clear() before unref'ing fragments skbuff: rename sock_zerocopy_* to msg_zerocopy_* drivers/net/tap.c | 6 +- drivers/net/tun.c | 6 +- drivers/net/xen-netback/common.h | 3 +- drivers/net/xen-netback/interface.c | 4 +- drivers/net/xen-netback/netback.c | 7 ++- drivers/vhost/net.c | 4 +- include/linux/skbuff.h | 95 +++++++++++++++-------------- net/core/skbuff.c | 66 ++++++++++---------- net/ipv4/ip_output.c | 5 +- net/ipv4/tcp.c | 8 +-- net/ipv6/ip6_output.c | 5 +- net/kcm/kcmsock.c | 4 +- 12 files changed, 106 insertions(+), 107 deletions(-) -- 2.24.1
