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authorOlga Kornievskaia <kolga@netapp.com>2021-06-24 06:28:50 +0300
committerTrond Myklebust <trond.myklebust@hammerspace.com>2021-07-08 21:03:24 +0300
commit5b7eb78486cd9ac58bfbd6d84ea0fe2d9fead03b (patch)
tree1a71de43011ed7c434117cfe94676739a880c3f0 /net/sunrpc/xprtmultipath.c
parentc1830a63c79aa90f725ed6feaad097473f2b990d (diff)
downloadlinux-5b7eb78486cd9ac58bfbd6d84ea0fe2d9fead03b.tar.xz
SUNRPC: take a xprt offline using sysfs
Using sysfs's xprt_state attribute, mark a particular transport offline. It will not be picked during the round-robin selection. It's not allowed to take the main (1st created transport associated with the rpc_client) offline. Also bring a transport back online via sysfs by writing "online" and that would allow for this transport to be picked during the round- robin selection. Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'net/sunrpc/xprtmultipath.c')
-rw-r--r--net/sunrpc/xprtmultipath.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/net/sunrpc/xprtmultipath.c b/net/sunrpc/xprtmultipath.c
index 07e76ae1028a..5f4845d1e922 100644
--- a/net/sunrpc/xprtmultipath.c
+++ b/net/sunrpc/xprtmultipath.c
@@ -65,7 +65,8 @@ static void xprt_switch_remove_xprt_locked(struct rpc_xprt_switch *xps,
{
if (unlikely(xprt == NULL))
return;
- xps->xps_nactive--;
+ if (!test_bit(XPRT_OFFLINE, &xprt->state))
+ xps->xps_nactive--;
xps->xps_nxprts--;
if (xps->xps_nxprts == 0)
xps->xps_net = NULL;
@@ -230,7 +231,8 @@ void xprt_iter_default_rewind(struct rpc_xprt_iter *xpi)
static
bool xprt_is_active(const struct rpc_xprt *xprt)
{
- return kref_read(&xprt->kref) != 0;
+ return (kref_read(&xprt->kref) != 0 &&
+ !test_bit(XPRT_OFFLINE, &xprt->state));
}
static