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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 <kolga@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Olga Kornievskaia 2022-07-25 09:32:21 -04:00 committed by Trond Myklebust
parent 29946fbcb2
commit 7ffcdaa670
3 changed files with 40 additions and 23 deletions
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3
include/linux/sunrpc/xprt.h
View File

@ -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 */

28
net/sunrpc/sysfs.c
View File

@ -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:

32
net/sunrpc/xprt.c
View File

@ -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);
}