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0df7cd3c13
linux/net
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Arseniy Krasnov 0df7cd3c13 vsock/virtio/vhost: read data from non-linear skb 
This is preparation patch for MSG_ZEROCOPY support. It adds handling of
non-linear skbs by replacing direct calls of 'memcpy_to_msg()' with
'skb_copy_datagram_iter()'. Main advantage of the second one is that it
can handle paged part of the skb by using 'kmap()' on each page, but if
there are no pages in the skb, it behaves like simple copying to iov
iterator. This patch also adds new field to the control block of skb -
this value shows current offset in the skb to read next portion of data
(it doesn't matter linear it or not). Idea behind this field is that
'skb_copy_datagram_iter()' handles both types of skb internally - it
just needs an offset from which to copy data from the given skb. This
offset is incremented on each read from skb. This approach allows to
simplify handling of both linear and non-linear skbs, because for
linear skb we need to call 'skb_pull()' after reading data from it,
while in non-linear case we need to update 'data_len'.

Signed-off-by: Arseniy Krasnov <avkrasnov@salutedevices.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2023-09-21 12:34:00 +02:00
..
6lowpan 6lowpan: Remove redundant initialisation. 2023-03-29 08:22:52 +01:00
9p net: annotate data-races around sock->ops 2023-08-09 15:32:43 -07:00
802 treewide: Convert del_timer*() to timer_shutdown*() 2022-12-25 13:38:09 -08:00
8021q Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-18 12:44:56 -07:00
appletalk sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
atm sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
ax25 ax.25: Update to register_net_sysctl_sz 2023-08-15 15:26:17 -07:00
batman-adv Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-24 10:51:39 -07:00
bluetooth TTY/Serial driver changes for 6.6-rc1 2023-09-01 09:38:00 -07:00
bpf bpf: Prevent inlining of bpf_fentry_test7() 2023-08-30 08:36:17 +02:00
bpfilter net: Use umd_cleanup_helper() 2023-05-31 13:06:57 +02:00
bridge sysctl-6.6-rc1 2023-08-29 17:39:15 -07:00
caif sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
can net: annotate data-races around sk->sk_tsflags 2023-09-01 07:27:33 +01:00
ceph ceph: Annotate struct ceph_monmap with __counted_by 2023-09-18 10:39:29 +01:00
core Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2023-09-17 15:12:06 +01:00
dcb net: dcb: choose correct policy to parse DCB_ATTR_BCN 2023-08-01 21:07:46 -07:00
dccp ipv6: lockless IPV6_FLOWINFO_SEND implementation 2023-09-15 10:33:48 +01:00
devlink devlink: introduce possibility to expose info about nested devlinks 2023-09-17 14:01:47 +01:00
dns_resolver cred: Do not default to init_cred in prepare_kernel_cred() 2022-11-01 10:04:52 -07:00
dsa net: dsa: mark parsed interface mode for legacy switch drivers 2023-08-09 13:08:09 -07:00
ethernet net: ethernet: use sysfs_emit() to instead of scnprintf() 2022-12-07 20:02:44 -08:00
ethtool ethtool: netlink: always pass genl_info to .prepare_data 2023-08-15 15:01:03 -07:00
handshake net/handshake: fix null-ptr-deref in handshake_nl_done_doit() 2023-09-01 07:25:14 +01:00
hsr hsr: Fix uninit-value access in fill_frame_info() 2023-09-11 08:28:36 +01:00
ieee802154 sysctl-6.6-rc1 2023-08-29 17:39:15 -07:00
ife
ipv4 tcp: new TCP_INFO stats for RTO events 2023-09-16 13:42:34 +01:00
ipv6 ipv6: lockless IPV6_ADDR_PREFERENCES implementation 2023-09-19 18:21:44 +02:00
iucv net/iucv: Fix size of interrupt data 2023-03-16 17:34:40 -07:00
kcm kcm: Fix error handling for SOCK_DGRAM in kcm_sendmsg(). 2023-09-14 10:43:51 +02:00
key Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-18 12:44:56 -07:00
l2tp ipv6: lockless IPV6_FLOWINFO_SEND implementation 2023-09-15 10:33:48 +01:00
l3mdev
lapb
llc net/llc/llc_conn.c: fix 4 instances of -Wmissing-variable-declarations 2023-08-09 15:34:28 -07:00
mac80211 wifi: cfg80211: make read-only array centers_80mhz static const 2023-09-20 11:52:13 +01:00
mac802154 Core WPAN changes: 2023-06-24 15:41:46 -07:00
mctp sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
mpls networking: Update to register_net_sysctl_sz 2023-08-15 15:26:18 -07:00
mptcp Including fixes from netfilter and bpf. 2023-09-07 18:33:07 -07:00
ncsi genetlink: make genl_info->nlhdr const 2023-08-15 14:54:44 -07:00
netfilter ipv6: lockless IPV6_MTU_DISCOVER implementation 2023-09-15 10:33:48 +01:00
netlabel netlabel: Remove unused declaration netlbl_cipsov4_doi_free() 2023-08-02 12:28:22 -07:00
netlink genetlink: add a family pointer to struct genl_info 2023-08-15 15:01:03 -07:00
netrom netrom: Deny concurrent connect(). 2023-08-28 06:58:46 +01:00
nfc TTY/Serial driver changes for 6.6-rc1 2023-09-01 09:38:00 -07:00
nsh net: move gso declarations and functions to their own files 2023-06-10 00:11:41 -07:00
openvswitch net: dst: remove unnecessary input parameter in dst_alloc and dst_init 2023-09-12 11:42:25 +02:00
packet Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-10 14:10:53 -07:00
phonet sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
psample
qrtr net: qrtr: Handle IPCR control port format of older targets 2023-07-17 09:02:30 +01:00
rds sysctl-6.6-rc1 2023-08-29 17:39:15 -07:00
rfkill net: rfkill-gpio: Add explicit include for of.h 2023-04-06 20:36:27 +02:00
rose sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
rxrpc Networking changes for 6.5. 2023-06-28 16:43:10 -07:00
sched net/sched: cls_route: make netlink errors meaningful 2023-09-13 12:38:52 +01:00
sctp ipv6: lockless IPV6_FLOWINFO_SEND implementation 2023-09-15 10:33:48 +01:00
smc net/smc: use smc_lgr_list.lock to protect smc_lgr_list.list iterate in smcr_port_add 2023-09-10 19:31:42 +01:00
strparser
sunrpc NFS CLient Updates for Linux 6.6 2023-08-31 15:36:41 -07:00
switchdev net: switchdev: Add a helper to replay objects on a bridge port 2023-07-21 08:54:03 +01:00
tipc tipc: Use size_add() in calls to struct_size() 2023-09-18 09:38:32 +01:00
tls tls: Use size_add() in call to struct_size() 2023-09-18 09:37:23 +01:00
unix Including fixes from netfilter and bpf. 2023-09-07 18:33:07 -07:00
vmw_vsock vsock/virtio/vhost: read data from non-linear skb 2023-09-21 12:34:00 +02:00
wireless wifi: nl80211: Remove unused declaration nl80211_pmsr_dump_results() 2023-08-22 21:40:40 +02:00
x25 sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES) 2023-06-24 15:50:13 -07:00
xdp xsk: add multi-buffer support for sockets sharing umem 2023-09-15 11:00:22 -07:00
xfrm net: dst: remove unnecessary input parameter in dst_alloc and dst_init 2023-09-12 11:42:25 +02:00
compat.c net/compat: Update msg_control_is_user when setting a kernel pointer 2023-04-14 11:09:27 +01:00
devres.c
Kconfig bpf: Add fd-based tcx multi-prog infra with link support 2023-07-19 10:07:27 -07:00
Kconfig.debug net: make NET_(DEV|NS)_REFCNT_TRACKER depend on NET 2022-09-20 14:23:56 -07:00
Makefile net/handshake: Create a NETLINK service for handling handshake requests 2023-04-19 18:48:48 -07:00
socket.c Including fixes from netfilter and bpf. 2023-09-07 18:33:07 -07:00
sysctl_net.c sysctl: Add size to register_net_sysctl function 2023-08-15 15:26:17 -07:00