From: Olga Kornievskaia Date: Mon, 25 Jul 2022 13:32:21 +0000 (-0400) Subject: SUNRPC expose functions for offline remote xprt functionality X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=7ffcdaa670164a2ad3844a5ef6df5423782ba290;p=linux.git SUNRPC expose functions for offline remote xprt functionality Re-arrange the code that make offline transport and delete transport callable functions. Signed-off-by: Olga Kornievskaia Signed-off-by: Trond Myklebust --- diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h index 522bbf9379571..0d51b9f9ea379 100644 --- a/include/linux/sunrpc/xprt.h +++ b/include/linux/sunrpc/xprt.h @@ -505,4 +505,7 @@ static inline int xprt_test_and_set_binding(struct rpc_xprt *xprt) return test_and_set_bit(XPRT_BINDING, &xprt->state); } +void xprt_set_offline_locked(struct rpc_xprt *xprt, struct rpc_xprt_switch *xps); +void xprt_set_online_locked(struct rpc_xprt *xprt, struct rpc_xprt_switch *xps); +void xprt_delete_locked(struct rpc_xprt *xprt, struct rpc_xprt_switch *xps); #endif /* _LINUX_SUNRPC_XPRT_H */ diff --git a/net/sunrpc/sysfs.c b/net/sunrpc/sysfs.c index a3a2f8aeb80ea..7330eb9a70cf8 100644 --- a/net/sunrpc/sysfs.c +++ b/net/sunrpc/sysfs.c @@ -314,32 +314,14 @@ static ssize_t rpc_sysfs_xprt_state_change(struct kobject *kobj, goto release_tasks; } if (offline) { - if (!test_and_set_bit(XPRT_OFFLINE, &xprt->state)) { - spin_lock(&xps->xps_lock); - xps->xps_nactive--; - spin_unlock(&xps->xps_lock); - } + xprt_set_offline_locked(xprt, xps); } else if (online) { - if (test_and_clear_bit(XPRT_OFFLINE, &xprt->state)) { - spin_lock(&xps->xps_lock); - xps->xps_nactive++; - spin_unlock(&xps->xps_lock); - } + xprt_set_online_locked(xprt, xps); } else if (remove) { - if (test_bit(XPRT_OFFLINE, &xprt->state)) { - if (!test_and_set_bit(XPRT_REMOVE, &xprt->state)) { - xprt_force_disconnect(xprt); - if (test_bit(XPRT_CONNECTED, &xprt->state)) { - if (!xprt->sending.qlen && - !xprt->pending.qlen && - !xprt->backlog.qlen && - !atomic_long_read(&xprt->queuelen)) - rpc_xprt_switch_remove_xprt(xps, xprt); - } - } - } else { + if (test_bit(XPRT_OFFLINE, &xprt->state)) + xprt_delete_locked(xprt, xps); + else count = -EINVAL; - } } release_tasks: diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index 86d62cffba0dd..8f8e3c952f24a 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -2152,3 +2152,35 @@ void xprt_put(struct rpc_xprt *xprt) kref_put(&xprt->kref, xprt_destroy_kref); } EXPORT_SYMBOL_GPL(xprt_put); + +void xprt_set_offline_locked(struct rpc_xprt *xprt, struct rpc_xprt_switch *xps) +{ + if (!test_and_set_bit(XPRT_OFFLINE, &xprt->state)) { + spin_lock(&xps->xps_lock); + xps->xps_nactive--; + spin_unlock(&xps->xps_lock); + } +} + +void xprt_set_online_locked(struct rpc_xprt *xprt, struct rpc_xprt_switch *xps) +{ + if (test_and_clear_bit(XPRT_OFFLINE, &xprt->state)) { + spin_lock(&xps->xps_lock); + xps->xps_nactive++; + spin_unlock(&xps->xps_lock); + } +} + +void xprt_delete_locked(struct rpc_xprt *xprt, struct rpc_xprt_switch *xps) +{ + if (test_and_set_bit(XPRT_REMOVE, &xprt->state)) + return; + + xprt_force_disconnect(xprt); + if (!test_bit(XPRT_CONNECTED, &xprt->state)) + return; + + if (!xprt->sending.qlen && !xprt->pending.qlen && + !xprt->backlog.qlen && !atomic_long_read(&xprt->queuelen)) + rpc_xprt_switch_remove_xprt(xps, xprt); +}