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authorOlga Kornievskaia2022-07-25 09:32:26 -0400
committerTrond Myklebust2022-07-25 10:06:04 -0400
commit497e6464d6adcee64f071b18fc826e63cfd2f0a5 (patch)
tree6b8432ece95cc96b7047eb53e0be45539b613a95
parent9368fd6c75053630e95a6dbd17c9522e82101276 (diff)
SUNRPC create an rpc function that allows xprt removal from rpc_clnt
Expose a function that allows a removal of xprt from the rpc_clnt. When called from NFS that's running a trunked transport then don't decrement the active transport counter. Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
-rw-r--r--include/linux/sunrpc/clnt.h1
-rw-r--r--include/linux/sunrpc/xprtmultipath.h2
-rw-r--r--net/sunrpc/clnt.c16
-rw-r--r--net/sunrpc/xprt.c2
-rw-r--r--net/sunrpc/xprtmultipath.c11
5 files changed, 24 insertions, 8 deletions
diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
index 71a3a1dd7e81..7a43fd514398 100644
--- a/include/linux/sunrpc/clnt.h
+++ b/include/linux/sunrpc/clnt.h
@@ -240,6 +240,7 @@ 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 *);
+void rpc_clnt_xprt_switch_remove_xprt(struct rpc_clnt *, struct rpc_xprt *);
bool rpc_clnt_xprt_switch_has_addr(struct rpc_clnt *clnt,
const struct sockaddr *sap);
void rpc_clnt_xprt_set_online(struct rpc_clnt *clnt, struct rpc_xprt *xprt);
diff --git a/include/linux/sunrpc/xprtmultipath.h b/include/linux/sunrpc/xprtmultipath.h
index 688ca7eb1d01..9fff0768d942 100644
--- a/include/linux/sunrpc/xprtmultipath.h
+++ b/include/linux/sunrpc/xprtmultipath.h
@@ -55,7 +55,7 @@ extern void rpc_xprt_switch_set_roundrobin(struct rpc_xprt_switch *xps);
extern void rpc_xprt_switch_add_xprt(struct rpc_xprt_switch *xps,
struct rpc_xprt *xprt);
extern void rpc_xprt_switch_remove_xprt(struct rpc_xprt_switch *xps,
- struct rpc_xprt *xprt);
+ struct rpc_xprt *xprt, bool offline);
extern void xprt_iter_init(struct rpc_xprt_iter *xpi,
struct rpc_xprt_switch *xps);
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 9dbce3b0d3a2..26f3102500bb 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -2144,7 +2144,8 @@ call_connect_status(struct rpc_task *task)
xprt_release(task);
value = atomic_long_dec_return(&xprt->queuelen);
if (value == 0)
- rpc_xprt_switch_remove_xprt(xps, saved);
+ rpc_xprt_switch_remove_xprt(xps, saved,
+ true);
xprt_put(saved);
task->tk_xprt = NULL;
task->tk_action = call_start;
@@ -3118,6 +3119,19 @@ void rpc_clnt_xprt_switch_add_xprt(struct rpc_clnt *clnt, struct rpc_xprt *xprt)
}
EXPORT_SYMBOL_GPL(rpc_clnt_xprt_switch_add_xprt);
+void rpc_clnt_xprt_switch_remove_xprt(struct rpc_clnt *clnt, struct rpc_xprt *xprt)
+{
+ struct rpc_xprt_switch *xps;
+
+ rcu_read_lock();
+ xps = rcu_dereference(clnt->cl_xpi.xpi_xpswitch);
+ rpc_xprt_switch_remove_xprt(rcu_dereference(clnt->cl_xpi.xpi_xpswitch),
+ xprt, 0);
+ xps->xps_nunique_destaddr_xprts--;
+ rcu_read_unlock();
+}
+EXPORT_SYMBOL_GPL(rpc_clnt_xprt_switch_remove_xprt);
+
bool rpc_clnt_xprt_switch_has_addr(struct rpc_clnt *clnt,
const struct sockaddr *sap)
{
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 8f8e3c952f24..44348c9f4b00 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -2182,5 +2182,5 @@ void xprt_delete_locked(struct rpc_xprt *xprt, struct rpc_xprt_switch *xps)
if (!xprt->sending.qlen && !xprt->pending.qlen &&
!xprt->backlog.qlen && !atomic_long_read(&xprt->queuelen))
- rpc_xprt_switch_remove_xprt(xps, xprt);
+ rpc_xprt_switch_remove_xprt(xps, xprt, true);
}
diff --git a/net/sunrpc/xprtmultipath.c b/net/sunrpc/xprtmultipath.c
index 8def8423fc0a..55da01730311 100644
--- a/net/sunrpc/xprtmultipath.c
+++ b/net/sunrpc/xprtmultipath.c
@@ -62,11 +62,11 @@ void rpc_xprt_switch_add_xprt(struct rpc_xprt_switch *xps,
}
static void xprt_switch_remove_xprt_locked(struct rpc_xprt_switch *xps,
- struct rpc_xprt *xprt)
+ struct rpc_xprt *xprt, bool offline)
{
if (unlikely(xprt == NULL))
return;
- if (!test_bit(XPRT_OFFLINE, &xprt->state))
+ if (!test_bit(XPRT_OFFLINE, &xprt->state) && offline)
xps->xps_nactive--;
xps->xps_nxprts--;
if (xps->xps_nxprts == 0)
@@ -79,14 +79,15 @@ static void xprt_switch_remove_xprt_locked(struct rpc_xprt_switch *xps,
* rpc_xprt_switch_remove_xprt - Removes an rpc_xprt from a rpc_xprt_switch
* @xps: pointer to struct rpc_xprt_switch
* @xprt: pointer to struct rpc_xprt
+ * @offline: indicates if the xprt that's being removed is in an offline state
*
* Removes xprt from the list of struct rpc_xprt in xps.
*/
void rpc_xprt_switch_remove_xprt(struct rpc_xprt_switch *xps,
- struct rpc_xprt *xprt)
+ struct rpc_xprt *xprt, bool offline)
{
spin_lock(&xps->xps_lock);
- xprt_switch_remove_xprt_locked(xps, xprt);
+ xprt_switch_remove_xprt_locked(xps, xprt, offline);
spin_unlock(&xps->xps_lock);
xprt_put(xprt);
}
@@ -155,7 +156,7 @@ static void xprt_switch_free_entries(struct rpc_xprt_switch *xps)
xprt = list_first_entry(&xps->xps_xprt_list,
struct rpc_xprt, xprt_switch);
- xprt_switch_remove_xprt_locked(xps, xprt);
+ xprt_switch_remove_xprt_locked(xps, xprt, true);
spin_unlock(&xps->xps_lock);
xprt_put(xprt);
spin_lock(&xps->xps_lock);