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SUNRPC search xprt switch for sockaddr 

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Andy Adamson 2016-09-09 09:22:25 -04:00 committed by Anna Schumaker
parent dd69171769
commit 39e5d2df95
4 changed files with 42 additions and 1 deletions
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2
include/linux/sunrpc/clnt.h
View File

@ -202,5 +202,7 @@ const char *rpc_proc_name(const struct rpc_task *task);
void rpc_clnt_xprt_switch_put(struct rpc_clnt *);
void rpc_clnt_xprt_switch_add_xprt(struct rpc_clnt *, struct rpc_xprt *);
bool rpc_clnt_xprt_switch_has_addr(struct rpc_clnt *clnt,
const struct sockaddr *sap);
#endif /* __KERNEL__ */
#endif /* _LINUX_SUNRPC_CLNT_H */

2
include/linux/sunrpc/xprtmultipath.h
View File

@ -66,4 +66,6 @@ extern struct rpc_xprt *xprt_iter_xprt(struct rpc_xprt_iter *xpi);
extern struct rpc_xprt *xprt_iter_get_xprt(struct rpc_xprt_iter *xpi);
extern struct rpc_xprt *xprt_iter_get_next(struct rpc_xprt_iter *xpi);
extern bool rpc_xprt_switch_has_addr(struct rpc_xprt_switch *xps,
const struct sockaddr *sap);
#endif

15
net/sunrpc/clnt.c
View File

@ -2708,6 +2708,21 @@ void rpc_clnt_xprt_switch_add_xprt(struct rpc_clnt *clnt, struct rpc_xprt *xprt)
}
EXPORT_SYMBOL_GPL(rpc_clnt_xprt_switch_add_xprt);
bool rpc_clnt_xprt_switch_has_addr(struct rpc_clnt *clnt,
const struct sockaddr *sap)
{
struct rpc_xprt_switch *xps;
bool ret;
xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch);
rcu_read_lock();
ret = rpc_xprt_switch_has_addr(xps, sap);
rcu_read_unlock();
return ret;
}
EXPORT_SYMBOL_GPL(rpc_clnt_xprt_switch_has_addr);
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
static void rpc_show_header(void)
{

24
net/sunrpc/xprtmultipath.c
View File

@ -15,6 +15,7 @@
#include <asm/cmpxchg.h>
#include <linux/spinlock.h>
#include <linux/sunrpc/xprt.h>
#include <linux/sunrpc/addr.h>
#include <linux/sunrpc/xprtmultipath.h>
typedef struct rpc_xprt *(*xprt_switch_find_xprt_t)(struct list_head *head,
@ -49,7 +50,8 @@ void rpc_xprt_switch_add_xprt(struct rpc_xprt_switch *xps,
if (xprt == NULL)
return;
spin_lock(&xps->xps_lock);
if (xps->xps_net == xprt->xprt_net || xps->xps_net == NULL)
if ((xps->xps_net == xprt->xprt_net || xps->xps_net == NULL) &&
!rpc_xprt_switch_has_addr(xps, (struct sockaddr *)&xprt->addr))
xprt_switch_add_xprt_locked(xps, xprt);
spin_unlock(&xps->xps_lock);
}
@ -232,6 +234,26 @@ struct rpc_xprt *xprt_iter_current_entry(struct rpc_xprt_iter *xpi)
return xprt_switch_find_current_entry(head, xpi->xpi_cursor);
}
bool rpc_xprt_switch_has_addr(struct rpc_xprt_switch *xps,
const struct sockaddr *sap)
{
struct list_head *head;
struct rpc_xprt *pos;
if (xps == NULL || sap == NULL)
return false;
head = &xps->xps_xprt_list;
list_for_each_entry_rcu(pos, head, xprt_switch) {
if (rpc_cmp_addr_port(sap, (struct sockaddr *)&pos->addr)) {
pr_info("RPC: addr %s already in xprt switch\n",
pos->address_strings[RPC_DISPLAY_ADDR]);
return true;
}
}
return false;
}
static
struct rpc_xprt *xprt_switch_find_next_entry(struct list_head *head,
const struct rpc_xprt *cur)