[PATCH] ipvs: change type of netns_ipvs->sysctl_sync_qlen_max

[Simon Horman <horms@xxxxxxxxxxxx>]

From: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx>

This member of struct netns_ipvs is calculated from nr_free_buffer_pages
so change its type to unsigned long in case of overflow.  Also, type of
its related proc var sync_qlen_max and the return type of function
sysctl_sync_qlen_max() should be changed to unsigned long, too.

Besides, the type of ipvs_master_sync_state->sync_queue_len should be
changed to unsigned long accordingly.

Signed-off-by: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx>
Cc: Julian Anastasov <ja@xxxxxx>
Cc: David Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>
---
 include/net/ip_vs.h            |    8 ++++----
 net/netfilter/ipvs/ip_vs_ctl.c |    4 ++--
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index 4c062cc..4405886 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -905,7 +905,7 @@ struct ip_vs_app {
 struct ipvs_master_sync_state {
        struct list_head        sync_queue;
        struct ip_vs_sync_buff  *sync_buff;
-       int                     sync_queue_len;
+       unsigned long           sync_queue_len;
        unsigned int            sync_queue_delay;
        struct task_struct      *master_thread;
        struct delayed_work     master_wakeup_work;
@@ -998,7 +998,7 @@ struct netns_ipvs {
        int                     sysctl_snat_reroute;
        int                     sysctl_sync_ver;
        int                     sysctl_sync_ports;
-       int                     sysctl_sync_qlen_max;
+       unsigned long           sysctl_sync_qlen_max;
        int                     sysctl_sync_sock_size;
        int                     sysctl_cache_bypass;
        int                     sysctl_expire_nodest_conn;
@@ -1085,7 +1085,7 @@ static inline int sysctl_sync_ports(struct netns_ipvs 
*ipvs)
        return ACCESS_ONCE(ipvs->sysctl_sync_ports);
 }
 
-static inline int sysctl_sync_qlen_max(struct netns_ipvs *ipvs)
+static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs)
 {
        return ipvs->sysctl_sync_qlen_max;
 }
@@ -1138,7 +1138,7 @@ static inline int sysctl_sync_ports(struct netns_ipvs 
*ipvs)
        return 1;
 }
 
-static inline int sysctl_sync_qlen_max(struct netns_ipvs *ipvs)
+static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs)
 {
        return IPVS_SYNC_QLEN_MAX;
 }
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index 5b142fb..7014649 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -1716,9 +1716,9 @@ static struct ctl_table vs_vars[] = {
        },
        {
                .procname       = "sync_qlen_max",
-               .maxlen         = sizeof(int),
+               .maxlen         = sizeof(unsigned long),
                .mode           = 0644,
-               .proc_handler   = proc_dointvec,
+               .proc_handler   = proc_doulongvec_minmax,
        },
        {
                .procname       = "sync_sock_size",
-- 
1.7.10.4

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