diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2023-11-27 02:07:30 +0300 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2023-11-28 17:48:39 +0300 |
| commit | 083772c9f972dcc248913b52a0dec1025baa1e16 (patch) | |
| tree | 571696450af19199654e4531877b3bd6afd258ff /include/linux | |
| parent | f17c69649c698e4df3cfe0010b7bbf142dec3e40 (diff) | |
| download | linux-083772c9f972dcc248913b52a0dec1025baa1e16.tar.xz | |
net: page_pool: record pools per netdev
Link the page pools with netdevs. This needs to be netns compatible
so we have two options. Either we record the pools per netns and
have to worry about moving them as the netdev gets moved.
Or we record them directly on the netdev so they move with the netdev
without any extra work.
Implement the latter option. Since pools may outlast netdev we need
a place to store orphans. In time honored tradition use loopback
for this purpose.
Reviewed-by: Mina Almasry <almasrymina@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Acked-by: Jesper Dangaard Brouer <hawk@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/list.h | 20 | ||||
| -rw-r--r-- | include/linux/netdevice.h | 4 | ||||
| -rw-r--r-- | include/linux/poison.h | 2 |
3 files changed, 26 insertions, 0 deletions
diff --git a/include/linux/list.h b/include/linux/list.h index 1837caedf723..059aa1fff41e 100644 --- a/include/linux/list.h +++ b/include/linux/list.h @@ -1119,6 +1119,26 @@ static inline void hlist_move_list(struct hlist_head *old, old->first = NULL; } +/** + * hlist_splice_init() - move all entries from one list to another + * @from: hlist_head from which entries will be moved + * @last: last entry on the @from list + * @to: hlist_head to which entries will be moved + * + * @to can be empty, @from must contain at least @last. + */ +static inline void hlist_splice_init(struct hlist_head *from, + struct hlist_node *last, + struct hlist_head *to) +{ + if (to->first) + to->first->pprev = &last->next; + last->next = to->first; + to->first = from->first; + from->first->pprev = &to->first; + from->first = NULL; +} + #define hlist_entry(ptr, type, member) container_of(ptr,type,member) #define hlist_for_each(pos, head) \ diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index e87caa81f70c..998c7aaa98b8 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -2447,6 +2447,10 @@ struct net_device { #if IS_ENABLED(CONFIG_DPLL) struct dpll_pin *dpll_pin; #endif +#if IS_ENABLED(CONFIG_PAGE_POOL) + /** @page_pools: page pools created for this netdevice */ + struct hlist_head page_pools; +#endif }; #define to_net_dev(d) container_of(d, struct net_device, dev) diff --git a/include/linux/poison.h b/include/linux/poison.h index 851a855d3868..27a7dad17eef 100644 --- a/include/linux/poison.h +++ b/include/linux/poison.h @@ -83,6 +83,8 @@ /********** net/core/skbuff.c **********/ #define SKB_LIST_POISON_NEXT ((void *)(0x800 + POISON_POINTER_DELTA)) +/********** net/ **********/ +#define NET_PTR_POISON ((void *)(0x801 + POISON_POINTER_DELTA)) /********** kernel/bpf/ **********/ #define BPF_PTR_POISON ((void *)(0xeB9FUL + POISON_POINTER_DELTA)) |