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Message-Id: <1519757908-32863-9-git-send-email-yuvalm@mellanox.com>
Date: Tue, 27 Feb 2018 20:58:25 +0200
From: Yuval Mintz <yuvalm@...lanox.com>
To: netdev@...r.kernel.org
Cc: mlxsw@...lanox.com, kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org,
nikolay@...ulusnetworks.com, Yuval Mintz <yuvalm@...lanox.com>
Subject: [PATCH net-next 08/11] ipmr, ip6mr: Unite mfc seq logic
With the exception of the final dump, ipmr and ip6mr have the exact same
seq logic for traversing a given mr_table. Refactor that code and make
it common.
Signed-off-by: Yuval Mintz <yuvalm@...lanox.com>
---
include/linux/mroute_base.h | 69 ++++++++++++++++++++++++++++++++
net/ipv4/ipmr.c | 93 +++----------------------------------------
net/ipv4/ipmr_base.c | 62 +++++++++++++++++++++++++++++
net/ipv6/ip6mr.c | 97 ++++-----------------------------------------
4 files changed, 143 insertions(+), 178 deletions(-)
diff --git a/include/linux/mroute_base.h b/include/linux/mroute_base.h
index 18a1d75..413f103 100644
--- a/include/linux/mroute_base.h
+++ b/include/linux/mroute_base.h
@@ -3,6 +3,7 @@
#include <linux/netdevice.h>
#include <linux/rhashtable.h>
+#include <linux/spinlock.h>
#include <net/net_namespace.h>
#include <net/sock.h>
@@ -203,4 +204,72 @@ static inline void *mr_mfc_find(struct mr_table *mrt, void *hasharg)
{
return mr_mfc_find_parent(mrt, hasharg, -1);
}
+
+#ifdef CONFIG_PROC_FS
+struct mr_mfc_iter {
+ struct seq_net_private p;
+ struct mr_table *mrt;
+ struct list_head *cache;
+
+ /* Lock protecting the mr_table's unresolved queue */
+ spinlock_t *lock;
+};
+
+#ifdef CONFIG_IP_MROUTE_COMMON
+/* These actually return 'struct mr_mfc *', but to avoid need for explicit
+ * castings they simply return void.
+ */
+void *mr_mfc_seq_idx(struct net *net,
+ struct mr_mfc_iter *it, loff_t pos);
+void *mr_mfc_seq_next(struct seq_file *seq, void *v,
+ loff_t *pos);
+
+static inline void *mr_mfc_seq_start(struct seq_file *seq, loff_t *pos,
+ struct mr_table *mrt, spinlock_t *lock)
+{
+ struct mr_mfc_iter *it = seq->private;
+
+ it->mrt = mrt;
+ it->cache = NULL;
+ it->lock = lock;
+
+ return *pos ? mr_mfc_seq_idx(seq_file_net(seq),
+ seq->private, *pos - 1)
+ : SEQ_START_TOKEN;
+}
+
+static inline void mr_mfc_seq_stop(struct seq_file *seq, void *v)
+{
+ struct mr_mfc_iter *it = seq->private;
+ struct mr_table *mrt = it->mrt;
+
+ if (it->cache == &mrt->mfc_unres_queue)
+ spin_unlock_bh(it->lock);
+ else if (it->cache == &mrt->mfc_cache_list)
+ rcu_read_unlock();
+}
+#else
+static inline void *mr_mfc_seq_idx(struct net *net,
+ struct mr_mfc_iter *it, loff_t pos)
+{
+ return NULL;
+}
+
+static inline void *mr_mfc_seq_next(struct seq_file *seq, void *v,
+ loff_t *pos)
+{
+ return NULL;
+}
+
+static inline void *mr_mfc_seq_start(struct seq_file *seq, loff_t *pos,
+ struct mr_table *mrt, spinlock_t *lock)
+{
+ return NULL;
+}
+
+static inline void mr_mfc_seq_stop(struct seq_file *seq, void *v)
+{
+}
+#endif
+#endif
#endif
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index d0bf021..22b47e0 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -3014,41 +3014,8 @@ static const struct file_operations ipmr_vif_fops = {
.release = seq_release_net,
};
-struct ipmr_mfc_iter {
- struct seq_net_private p;
- struct mr_table *mrt;
- struct list_head *cache;
-};
-
-static struct mfc_cache *ipmr_mfc_seq_idx(struct net *net,
- struct ipmr_mfc_iter *it, loff_t pos)
-{
- struct mr_table *mrt = it->mrt;
- struct mr_mfc *mfc;
-
- rcu_read_lock();
- it->cache = &mrt->mfc_cache_list;
- list_for_each_entry_rcu(mfc, &mrt->mfc_cache_list, list)
- if (pos-- == 0)
- return (struct mfc_cache *)mfc;
- rcu_read_unlock();
-
- spin_lock_bh(&mfc_unres_lock);
- it->cache = &mrt->mfc_unres_queue;
- list_for_each_entry(mfc, it->cache, list)
- if (pos-- == 0)
- return (struct mfc_cache *)mfc;
-
- spin_unlock_bh(&mfc_unres_lock);
-
- it->cache = NULL;
- return NULL;
-}
-
-
static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos)
{
- struct ipmr_mfc_iter *it = seq->private;
struct net *net = seq_file_net(seq);
struct mr_table *mrt;
@@ -3056,57 +3023,7 @@ static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos)
if (!mrt)
return ERR_PTR(-ENOENT);
- it->mrt = mrt;
- it->cache = NULL;
- return *pos ? ipmr_mfc_seq_idx(net, seq->private, *pos - 1)
- : SEQ_START_TOKEN;
-}
-
-static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- struct ipmr_mfc_iter *it = seq->private;
- struct net *net = seq_file_net(seq);
- struct mr_table *mrt = it->mrt;
- struct mfc_cache *mfc = v;
-
- ++*pos;
-
- if (v == SEQ_START_TOKEN)
- return ipmr_mfc_seq_idx(net, seq->private, 0);
-
- if (mfc->_c.list.next != it->cache)
- return (struct mfc_cache *)(list_entry(mfc->_c.list.next,
- struct mr_mfc, list));
-
- if (it->cache == &mrt->mfc_unres_queue)
- goto end_of_list;
-
- /* exhausted cache_array, show unresolved */
- rcu_read_unlock();
- it->cache = &mrt->mfc_unres_queue;
-
- spin_lock_bh(&mfc_unres_lock);
- if (!list_empty(it->cache))
- return (struct mfc_cache *)(list_first_entry(it->cache,
- struct mr_mfc,
- list));
-
-end_of_list:
- spin_unlock_bh(&mfc_unres_lock);
- it->cache = NULL;
-
- return NULL;
-}
-
-static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v)
-{
- struct ipmr_mfc_iter *it = seq->private;
- struct mr_table *mrt = it->mrt;
-
- if (it->cache == &mrt->mfc_unres_queue)
- spin_unlock_bh(&mfc_unres_lock);
- else if (it->cache == &mrt->mfc_cache_list)
- rcu_read_unlock();
+ return mr_mfc_seq_start(seq, pos, mrt, &mfc_unres_lock);
}
static int ipmr_mfc_seq_show(struct seq_file *seq, void *v)
@@ -3118,7 +3035,7 @@ static int ipmr_mfc_seq_show(struct seq_file *seq, void *v)
"Group Origin Iif Pkts Bytes Wrong Oifs\n");
} else {
const struct mfc_cache *mfc = v;
- const struct ipmr_mfc_iter *it = seq->private;
+ const struct mr_mfc_iter *it = seq->private;
const struct mr_table *mrt = it->mrt;
seq_printf(seq, "%08X %08X %-3hd",
@@ -3152,15 +3069,15 @@ static int ipmr_mfc_seq_show(struct seq_file *seq, void *v)
static const struct seq_operations ipmr_mfc_seq_ops = {
.start = ipmr_mfc_seq_start,
- .next = ipmr_mfc_seq_next,
- .stop = ipmr_mfc_seq_stop,
+ .next = mr_mfc_seq_next,
+ .stop = mr_mfc_seq_stop,
.show = ipmr_mfc_seq_show,
};
static int ipmr_mfc_open(struct inode *inode, struct file *file)
{
return seq_open_net(inode, file, &ipmr_mfc_seq_ops,
- sizeof(struct ipmr_mfc_iter));
+ sizeof(struct mr_mfc_iter));
}
static const struct file_operations ipmr_mfc_fops = {
diff --git a/net/ipv4/ipmr_base.c b/net/ipv4/ipmr_base.c
index 172f92a..37ad0a7 100644
--- a/net/ipv4/ipmr_base.c
+++ b/net/ipv4/ipmr_base.c
@@ -103,3 +103,65 @@ void *mr_mfc_find_any(struct mr_table *mrt, int vifi, void *hasharg)
return mr_mfc_find_any_parent(mrt, vifi);
}
EXPORT_SYMBOL(mr_mfc_find_any);
+
+#ifdef CONFIG_PROC_FS
+void *mr_mfc_seq_idx(struct net *net,
+ struct mr_mfc_iter *it, loff_t pos)
+{
+ struct mr_table *mrt = it->mrt;
+ struct mr_mfc *mfc;
+
+ rcu_read_lock();
+ it->cache = &mrt->mfc_cache_list;
+ list_for_each_entry_rcu(mfc, &mrt->mfc_cache_list, list)
+ if (pos-- == 0)
+ return mfc;
+ rcu_read_unlock();
+
+ spin_lock_bh(it->lock);
+ it->cache = &mrt->mfc_unres_queue;
+ list_for_each_entry(mfc, it->cache, list)
+ if (pos-- == 0)
+ return mfc;
+ spin_unlock_bh(it->lock);
+
+ it->cache = NULL;
+ return NULL;
+}
+EXPORT_SYMBOL(mr_mfc_seq_idx);
+
+void *mr_mfc_seq_next(struct seq_file *seq, void *v,
+ loff_t *pos)
+{
+ struct mr_mfc_iter *it = seq->private;
+ struct net *net = seq_file_net(seq);
+ struct mr_table *mrt = it->mrt;
+ struct mr_mfc *c = v;
+
+ ++*pos;
+
+ if (v == SEQ_START_TOKEN)
+ return mr_mfc_seq_idx(net, seq->private, 0);
+
+ if (c->list.next != it->cache)
+ return list_entry(c->list.next, struct mr_mfc, list);
+
+ if (it->cache == &mrt->mfc_unres_queue)
+ goto end_of_list;
+
+ /* exhausted cache_array, show unresolved */
+ rcu_read_unlock();
+ it->cache = &mrt->mfc_unres_queue;
+
+ spin_lock_bh(it->lock);
+ if (!list_empty(it->cache))
+ return list_first_entry(it->cache, struct mr_mfc, list);
+
+end_of_list:
+ spin_unlock_bh(it->lock);
+ it->cache = NULL;
+
+ return NULL;
+}
+EXPORT_SYMBOL(mr_mfc_seq_next);
+#endif
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 93a8c02..2d4e53b 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -333,40 +333,8 @@ static void ip6mr_free_table(struct mr_table *mrt)
}
#ifdef CONFIG_PROC_FS
-
-struct ipmr_mfc_iter {
- struct seq_net_private p;
- struct mr_table *mrt;
- struct list_head *cache;
-};
-
-
-static struct mfc6_cache *ipmr_mfc_seq_idx(struct net *net,
- struct ipmr_mfc_iter *it, loff_t pos)
-{
- struct mr_table *mrt = it->mrt;
- struct mr_mfc *mfc;
-
- rcu_read_lock();
- it->cache = &mrt->mfc_cache_list;
- list_for_each_entry_rcu(mfc, &mrt->mfc_cache_list, list)
- if (pos-- == 0)
- return (struct mfc6_cache *)mfc;
- rcu_read_unlock();
-
- spin_lock_bh(&mfc_unres_lock);
- it->cache = &mrt->mfc_unres_queue;
- list_for_each_entry(mfc, it->cache, list)
- if (pos-- == 0)
- return (struct mfc6_cache *)mfc;
- spin_unlock_bh(&mfc_unres_lock);
-
- it->cache = NULL;
- return NULL;
-}
-
-/*
- * The /proc interfaces to multicast routing /proc/ip6_mr_cache /proc/ip6_mr_vif
+/* The /proc interfaces to multicast routing
+ * /proc/ip6_mr_cache /proc/ip6_mr_vif
*/
struct ipmr_vif_iter {
@@ -476,7 +444,6 @@ static const struct file_operations ip6mr_vif_fops = {
static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos)
{
- struct ipmr_mfc_iter *it = seq->private;
struct net *net = seq_file_net(seq);
struct mr_table *mrt;
@@ -484,57 +451,7 @@ static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos)
if (!mrt)
return ERR_PTR(-ENOENT);
- it->mrt = mrt;
- it->cache = NULL;
- return *pos ? ipmr_mfc_seq_idx(net, seq->private, *pos - 1)
- : SEQ_START_TOKEN;
-}
-
-static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- struct mfc6_cache *mfc = v;
- struct ipmr_mfc_iter *it = seq->private;
- struct net *net = seq_file_net(seq);
- struct mr_table *mrt = it->mrt;
-
- ++*pos;
-
- if (v == SEQ_START_TOKEN)
- return ipmr_mfc_seq_idx(net, seq->private, 0);
-
- if (mfc->_c.list.next != it->cache)
- return (struct mfc6_cache *)(list_entry(mfc->_c.list.next,
- struct mr_mfc, list));
-
- if (it->cache == &mrt->mfc_unres_queue)
- goto end_of_list;
-
- /* exhausted cache_array, show unresolved */
- rcu_read_unlock();
- it->cache = &mrt->mfc_unres_queue;
-
- spin_lock_bh(&mfc_unres_lock);
- if (!list_empty(it->cache))
- return (struct mfc6_cache *)(list_first_entry(it->cache,
- struct mr_mfc,
- list));
-
- end_of_list:
- spin_unlock_bh(&mfc_unres_lock);
- it->cache = NULL;
-
- return NULL;
-}
-
-static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v)
-{
- struct ipmr_mfc_iter *it = seq->private;
- struct mr_table *mrt = it->mrt;
-
- if (it->cache == &mrt->mfc_unres_queue)
- spin_unlock_bh(&mfc_unres_lock);
- else if (it->cache == &mrt->mfc_cache_list)
- rcu_read_unlock();
+ return mr_mfc_seq_start(seq, pos, mrt, &mfc_unres_lock);
}
static int ipmr_mfc_seq_show(struct seq_file *seq, void *v)
@@ -548,7 +465,7 @@ static int ipmr_mfc_seq_show(struct seq_file *seq, void *v)
"Iif Pkts Bytes Wrong Oifs\n");
} else {
const struct mfc6_cache *mfc = v;
- const struct ipmr_mfc_iter *it = seq->private;
+ const struct mr_mfc_iter *it = seq->private;
struct mr_table *mrt = it->mrt;
seq_printf(seq, "%pI6 %pI6 %-3hd",
@@ -581,15 +498,15 @@ static int ipmr_mfc_seq_show(struct seq_file *seq, void *v)
static const struct seq_operations ipmr_mfc_seq_ops = {
.start = ipmr_mfc_seq_start,
- .next = ipmr_mfc_seq_next,
- .stop = ipmr_mfc_seq_stop,
+ .next = mr_mfc_seq_next,
+ .stop = mr_mfc_seq_stop,
.show = ipmr_mfc_seq_show,
};
static int ipmr_mfc_open(struct inode *inode, struct file *file)
{
return seq_open_net(inode, file, &ipmr_mfc_seq_ops,
- sizeof(struct ipmr_mfc_iter));
+ sizeof(struct mr_mfc_iter));
}
static const struct file_operations ip6mr_mfc_fops = {
--
2.4.3
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