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https://github.com/edk2-porting/linux-next.git
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xfrm: policy: convert policy_lock to spinlock
After earlier patches conversions all spots acquire the writer lock and we can now convert this to a normal spinlock. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Florian Westphal
Steffen Klassert
parent
d5b8f86dc7
commit
9d0380df62
@ -73,7 +73,7 @@ struct netns_xfrm {
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struct dst_ops xfrm6_dst_ops;
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#endif
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spinlock_t xfrm_state_lock;
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rwlock_t xfrm_policy_lock;
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spinlock_t xfrm_policy_lock;
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struct mutex xfrm_cfg_mutex;
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/* flow cache part */
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@ -484,7 +484,7 @@ static void xfrm_bydst_resize(struct net *net, int dir)
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if (!ndst)
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return;
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write_lock_bh(&net->xfrm.xfrm_policy_lock);
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spin_lock_bh(&net->xfrm.xfrm_policy_lock);
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write_seqcount_begin(&xfrm_policy_hash_generation);
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odst = rcu_dereference_protected(net->xfrm.policy_bydst[dir].table,
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@ -500,7 +500,7 @@ static void xfrm_bydst_resize(struct net *net, int dir)
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net->xfrm.policy_bydst[dir].hmask = nhashmask;
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write_seqcount_end(&xfrm_policy_hash_generation);
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write_unlock_bh(&net->xfrm.xfrm_policy_lock);
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spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
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synchronize_rcu();
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@ -519,7 +519,7 @@ static void xfrm_byidx_resize(struct net *net, int total)
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if (!nidx)
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return;
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write_lock_bh(&net->xfrm.xfrm_policy_lock);
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spin_lock_bh(&net->xfrm.xfrm_policy_lock);
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for (i = hmask; i >= 0; i--)
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xfrm_idx_hash_transfer(oidx + i, nidx, nhashmask);
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@ -527,7 +527,7 @@ static void xfrm_byidx_resize(struct net *net, int total)
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net->xfrm.policy_byidx = nidx;
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net->xfrm.policy_idx_hmask = nhashmask;
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write_unlock_bh(&net->xfrm.xfrm_policy_lock);
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spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
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xfrm_hash_free(oidx, (hmask + 1) * sizeof(struct hlist_head));
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}
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@ -617,7 +617,7 @@ static void xfrm_hash_rebuild(struct work_struct *work)
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rbits6 = net->xfrm.policy_hthresh.rbits6;
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} while (read_seqretry(&net->xfrm.policy_hthresh.lock, seq));
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write_lock_bh(&net->xfrm.xfrm_policy_lock);
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spin_lock_bh(&net->xfrm.xfrm_policy_lock);
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/* reset the bydst and inexact table in all directions */
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for (dir = 0; dir < XFRM_POLICY_MAX; dir++) {
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@ -659,7 +659,7 @@ static void xfrm_hash_rebuild(struct work_struct *work)
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hlist_add_head(&policy->bydst, chain);
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}
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write_unlock_bh(&net->xfrm.xfrm_policy_lock);
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spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
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mutex_unlock(&hash_resize_mutex);
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}
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@ -770,7 +770,7 @@ int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl)
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struct hlist_head *chain;
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struct hlist_node *newpos;
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write_lock_bh(&net->xfrm.xfrm_policy_lock);
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spin_lock_bh(&net->xfrm.xfrm_policy_lock);
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chain = policy_hash_bysel(net, &policy->selector, policy->family, dir);
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delpol = NULL;
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newpos = NULL;
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@ -781,7 +781,7 @@ int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl)
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xfrm_sec_ctx_match(pol->security, policy->security) &&
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!WARN_ON(delpol)) {
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if (excl) {
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write_unlock_bh(&net->xfrm.xfrm_policy_lock);
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spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
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return -EEXIST;
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}
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delpol = pol;
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@ -817,7 +817,7 @@ int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl)
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policy->curlft.use_time = 0;
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if (!mod_timer(&policy->timer, jiffies + HZ))
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xfrm_pol_hold(policy);
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write_unlock_bh(&net->xfrm.xfrm_policy_lock);
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spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
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if (delpol)
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xfrm_policy_kill(delpol);
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@ -837,7 +837,7 @@ struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, u8 type,
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struct hlist_head *chain;
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*err = 0;
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write_lock_bh(&net->xfrm.xfrm_policy_lock);
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spin_lock_bh(&net->xfrm.xfrm_policy_lock);
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chain = policy_hash_bysel(net, sel, sel->family, dir);
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ret = NULL;
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hlist_for_each_entry(pol, chain, bydst) {
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@ -850,7 +850,7 @@ struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, u8 type,
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*err = security_xfrm_policy_delete(
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pol->security);
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if (*err) {
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write_unlock_bh(&net->xfrm.xfrm_policy_lock);
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spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
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return pol;
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}
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__xfrm_policy_unlink(pol, dir);
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@ -859,7 +859,7 @@ struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, u8 type,
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break;
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}
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}
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write_unlock_bh(&net->xfrm.xfrm_policy_lock);
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spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
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if (ret && delete)
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xfrm_policy_kill(ret);
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@ -878,7 +878,7 @@ struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8 type,
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return NULL;
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*err = 0;
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write_lock_bh(&net->xfrm.xfrm_policy_lock);
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spin_lock_bh(&net->xfrm.xfrm_policy_lock);
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chain = net->xfrm.policy_byidx + idx_hash(net, id);
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ret = NULL;
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hlist_for_each_entry(pol, chain, byidx) {
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@ -889,7 +889,7 @@ struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8 type,
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*err = security_xfrm_policy_delete(
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pol->security);
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if (*err) {
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write_unlock_bh(&net->xfrm.xfrm_policy_lock);
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spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
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return pol;
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}
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__xfrm_policy_unlink(pol, dir);
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@ -898,7 +898,7 @@ struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8 type,
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break;
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}
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}
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write_unlock_bh(&net->xfrm.xfrm_policy_lock);
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spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
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if (ret && delete)
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xfrm_policy_kill(ret);
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@ -956,7 +956,7 @@ int xfrm_policy_flush(struct net *net, u8 type, bool task_valid)
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{
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int dir, err = 0, cnt = 0;
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write_lock_bh(&net->xfrm.xfrm_policy_lock);
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spin_lock_bh(&net->xfrm.xfrm_policy_lock);
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err = xfrm_policy_flush_secctx_check(net, type, task_valid);
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if (err)
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@ -972,14 +972,14 @@ int xfrm_policy_flush(struct net *net, u8 type, bool task_valid)
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if (pol->type != type)
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continue;
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__xfrm_policy_unlink(pol, dir);
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write_unlock_bh(&net->xfrm.xfrm_policy_lock);
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spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
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cnt++;
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xfrm_audit_policy_delete(pol, 1, task_valid);
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xfrm_policy_kill(pol);
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write_lock_bh(&net->xfrm.xfrm_policy_lock);
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spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
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goto again1;
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}
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@ -991,13 +991,13 @@ int xfrm_policy_flush(struct net *net, u8 type, bool task_valid)
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if (pol->type != type)
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continue;
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__xfrm_policy_unlink(pol, dir);
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write_unlock_bh(&net->xfrm.xfrm_policy_lock);
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spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
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cnt++;
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xfrm_audit_policy_delete(pol, 1, task_valid);
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xfrm_policy_kill(pol);
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write_lock_bh(&net->xfrm.xfrm_policy_lock);
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spin_lock_bh(&net->xfrm.xfrm_policy_lock);
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goto again2;
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}
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}
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@ -1006,7 +1006,7 @@ int xfrm_policy_flush(struct net *net, u8 type, bool task_valid)
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if (!cnt)
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err = -ESRCH;
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out:
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write_unlock_bh(&net->xfrm.xfrm_policy_lock);
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spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
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return err;
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}
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EXPORT_SYMBOL(xfrm_policy_flush);
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@ -1026,7 +1026,7 @@ int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
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if (list_empty(&walk->walk.all) && walk->seq != 0)
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return 0;
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write_lock_bh(&net->xfrm.xfrm_policy_lock);
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spin_lock_bh(&net->xfrm.xfrm_policy_lock);
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if (list_empty(&walk->walk.all))
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x = list_first_entry(&net->xfrm.policy_all, struct xfrm_policy_walk_entry, all);
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else
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@ -1054,7 +1054,7 @@ int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
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}
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list_del_init(&walk->walk.all);
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out:
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write_unlock_bh(&net->xfrm.xfrm_policy_lock);
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spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
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return error;
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}
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EXPORT_SYMBOL(xfrm_policy_walk);
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@ -1073,9 +1073,9 @@ void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net)
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if (list_empty(&walk->walk.all))
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return;
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write_lock_bh(&net->xfrm.xfrm_policy_lock); /*FIXME where is net? */
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spin_lock_bh(&net->xfrm.xfrm_policy_lock); /*FIXME where is net? */
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list_del(&walk->walk.all);
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write_unlock_bh(&net->xfrm.xfrm_policy_lock);
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spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
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}
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EXPORT_SYMBOL(xfrm_policy_walk_done);
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@ -1321,9 +1321,9 @@ int xfrm_policy_delete(struct xfrm_policy *pol, int dir)
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{
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struct net *net = xp_net(pol);
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write_lock_bh(&net->xfrm.xfrm_policy_lock);
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spin_lock_bh(&net->xfrm.xfrm_policy_lock);
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pol = __xfrm_policy_unlink(pol, dir);
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write_unlock_bh(&net->xfrm.xfrm_policy_lock);
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spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
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if (pol) {
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xfrm_policy_kill(pol);
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return 0;
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@ -1342,7 +1342,7 @@ int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol)
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return -EINVAL;
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#endif
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write_lock_bh(&net->xfrm.xfrm_policy_lock);
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spin_lock_bh(&net->xfrm.xfrm_policy_lock);
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old_pol = rcu_dereference_protected(sk->sk_policy[dir],
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lockdep_is_held(&net->xfrm.xfrm_policy_lock));
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if (pol) {
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@ -1360,7 +1360,7 @@ int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol)
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*/
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xfrm_sk_policy_unlink(old_pol, dir);
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}
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write_unlock_bh(&net->xfrm.xfrm_policy_lock);
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spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
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if (old_pol) {
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xfrm_policy_kill(old_pol);
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@ -1390,9 +1390,9 @@ static struct xfrm_policy *clone_policy(const struct xfrm_policy *old, int dir)
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newp->type = old->type;
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memcpy(newp->xfrm_vec, old->xfrm_vec,
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newp->xfrm_nr*sizeof(struct xfrm_tmpl));
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write_lock_bh(&net->xfrm.xfrm_policy_lock);
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spin_lock_bh(&net->xfrm.xfrm_policy_lock);
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xfrm_sk_policy_link(newp, dir);
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write_unlock_bh(&net->xfrm.xfrm_policy_lock);
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spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
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xfrm_pol_put(newp);
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}
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return newp;
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@ -3074,7 +3074,7 @@ static int __net_init xfrm_net_init(struct net *net)
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/* Initialize the per-net locks here */
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spin_lock_init(&net->xfrm.xfrm_state_lock);
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rwlock_init(&net->xfrm.xfrm_policy_lock);
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spin_lock_init(&net->xfrm.xfrm_policy_lock);
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mutex_init(&net->xfrm.xfrm_cfg_mutex);
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return 0;
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@ -3206,7 +3206,7 @@ static struct xfrm_policy *xfrm_migrate_policy_find(const struct xfrm_selector *
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struct hlist_head *chain;
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u32 priority = ~0U;
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read_lock_bh(&net->xfrm.xfrm_policy_lock); /*FIXME*/
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spin_lock_bh(&net->xfrm.xfrm_policy_lock);
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chain = policy_hash_direct(net, &sel->daddr, &sel->saddr, sel->family, dir);
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hlist_for_each_entry(pol, chain, bydst) {
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if (xfrm_migrate_selector_match(sel, &pol->selector) &&
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@ -3230,7 +3230,7 @@ static struct xfrm_policy *xfrm_migrate_policy_find(const struct xfrm_selector *
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xfrm_pol_hold(ret);
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read_unlock_bh(&net->xfrm.xfrm_policy_lock);
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spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
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return ret;
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}
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