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SUNRPC create a function that probes only offline transports

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For only offline transports, attempt to check connectivity via
a NULL call and, if that succeeds, call a provided session trunking
detection function.

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 09:32:30 -04:00 committed by Trond Myklebust
parent 273d6aed9e
commit 92cc04f60a
2 changed files with 67 additions and 0 deletions
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2
include/linux/sunrpc/clnt.h
View File

@ -235,6 +235,8 @@ int rpc_clnt_setup_test_and_add_xprt(struct rpc_clnt *,
struct rpc_xprt *,
void *);
void rpc_clnt_manage_trunked_xprts(struct rpc_clnt *);
void rpc_clnt_probe_trunked_xprts(struct rpc_clnt *,
struct rpc_add_xprt_test *);
const char *rpc_proc_name(const struct rpc_task *task);

65
net/sunrpc/clnt.c
View File

@ -807,6 +807,13 @@ int rpc_clnt_xprt_iter_init(struct rpc_clnt *clnt, struct rpc_xprt_iter *xpi)
return _rpc_clnt_xprt_iter_init(clnt, xpi, xprt_iter_init_listall);
}
static
int rpc_clnt_xprt_iter_offline_init(struct rpc_clnt *clnt,
struct rpc_xprt_iter *xpi)
{
return _rpc_clnt_xprt_iter_init(clnt, xpi, xprt_iter_init_listoffline);
}
/**
* rpc_clnt_iterate_for_each_xprt - Apply a function to all transports
* @clnt: pointer to client
@ -3018,6 +3025,64 @@ out_put_switch:
}
EXPORT_SYMBOL_GPL(rpc_clnt_add_xprt);
static int rpc_xprt_probe_trunked(struct rpc_clnt *clnt,
struct rpc_xprt *xprt,
struct rpc_add_xprt_test *data)
{
struct rpc_xprt_switch *xps;
struct rpc_xprt *main_xprt;
int status = 0;
xprt_get(xprt);
rcu_read_lock();
main_xprt = xprt_get(rcu_dereference(clnt->cl_xprt));
xps = xprt_switch_get(rcu_dereference(clnt->cl_xpi.xpi_xpswitch));
status = rpc_cmp_addr_port((struct sockaddr *)&xprt->addr,
(struct sockaddr *)&main_xprt->addr);
rcu_read_unlock();
xprt_put(main_xprt);
if (status || !test_bit(XPRT_OFFLINE, &xprt->state))
goto out;
status = rpc_clnt_add_xprt_helper(clnt, xprt, data);
out:
xprt_put(xprt);
xprt_switch_put(xps);
return status;
}
/* rpc_clnt_probe_trunked_xprt -- probe offlined transport for session trunking
* @clnt rpc_clnt structure
*
* For each offlined transport found in the rpc_clnt structure call
* the function rpc_xprt_probe_trunked() which will determine if this
* transport still belongs to the trunking group.
*/
void rpc_clnt_probe_trunked_xprts(struct rpc_clnt *clnt,
struct rpc_add_xprt_test *data)
{
struct rpc_xprt_iter xpi;
int ret;
ret = rpc_clnt_xprt_iter_offline_init(clnt, &xpi);
if (ret)
return;
for (;;) {
struct rpc_xprt *xprt = xprt_iter_get_next(&xpi);
if (!xprt)
break;
ret = rpc_xprt_probe_trunked(clnt, xprt, data);
xprt_put(xprt);
if (ret < 0)
break;
xprt_iter_rewind(&xpi);
}
xprt_iter_destroy(&xpi);
}
EXPORT_SYMBOL_GPL(rpc_clnt_probe_trunked_xprts);
static int rpc_xprt_offline(struct rpc_clnt *clnt,
struct rpc_xprt *xprt,
void *data)