Commit 898f8015 authored by Felix Fietkau's avatar Felix Fietkau Committed by David S. Miller

net: extract napi poll functionality to __napi_poll()

This commit introduces a new function __napi_poll() which does the main
logic of the existing napi_poll() function, and will be called by other
functions in later commits.
This idea and implementation is done by Felix Fietkau <nbd@nbd.name> and
is proposed as part of the patch to move napi work to work_queue
context.
This commit by itself is a code restructure.
Signed-off-by: default avatarFelix Fietkau <nbd@nbd.name>
Signed-off-by: default avatarWei Wang <weiwan@google.com>
Reviewed-by: default avatarAlexander Duyck <alexanderduyck@fb.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4feffead
......@@ -6776,15 +6776,10 @@ void __netif_napi_del(struct napi_struct *napi)
}
EXPORT_SYMBOL(__netif_napi_del);
static int napi_poll(struct napi_struct *n, struct list_head *repoll)
static int __napi_poll(struct napi_struct *n, bool *repoll)
{
void *have;
int work, weight;
list_del_init(&n->poll_list);
have = netpoll_poll_lock(n);
weight = n->weight;
/* This NAPI_STATE_SCHED test is for avoiding a race
......@@ -6804,7 +6799,7 @@ static int napi_poll(struct napi_struct *n, struct list_head *repoll)
n->poll, work, weight);
if (likely(work < weight))
goto out_unlock;
return work;
/* Drivers must not modify the NAPI state if they
* consume the entire weight. In such cases this code
......@@ -6813,7 +6808,7 @@ static int napi_poll(struct napi_struct *n, struct list_head *repoll)
*/
if (unlikely(napi_disable_pending(n))) {
napi_complete(n);
goto out_unlock;
return work;
}
/* The NAPI context has more processing work, but busy-polling
......@@ -6826,7 +6821,7 @@ static int napi_poll(struct napi_struct *n, struct list_head *repoll)
*/
napi_schedule(n);
}
goto out_unlock;
return work;
}
if (n->gro_bitmask) {
......@@ -6844,12 +6839,29 @@ static int napi_poll(struct napi_struct *n, struct list_head *repoll)
if (unlikely(!list_empty(&n->poll_list))) {
pr_warn_once("%s: Budget exhausted after napi rescheduled\n",
n->dev ? n->dev->name : "backlog");
goto out_unlock;
return work;
}
list_add_tail(&n->poll_list, repoll);
*repoll = true;
return work;
}
static int napi_poll(struct napi_struct *n, struct list_head *repoll)
{
bool do_repoll = false;
void *have;
int work;
list_del_init(&n->poll_list);
have = netpoll_poll_lock(n);
work = __napi_poll(n, &do_repoll);
if (do_repoll)
list_add_tail(&n->poll_list, repoll);
out_unlock:
netpoll_poll_unlock(have);
return work;
......
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