[PATCH v9 13/13] sunrpc: provide showing transport's state info in the sysfs directory
From: Olga Kornievskaia <hidden>
Date: 2021-06-03 22:22:10
Subsystem:
kernel nfsd, sunrpc, and lockd servers, networking [general], nfs, sunrpc, and lockd clients, the rest · Maintainers:
Chuck Lever, Jeff Layton, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Trond Myklebust, Anna Schumaker, Linus Torvalds
From: Olga Kornievskaia <redacted> In preparation of being able to change the xprt's state, add a way to show currect state of the transport. Signed-off-by: Olga Kornievskaia <redacted> --- net/sunrpc/sysfs.c | 47 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+)
diff --git a/net/sunrpc/sysfs.c b/net/sunrpc/sysfs.c
index 819134f28a4c..ec06c9257c07 100644
--- a/net/sunrpc/sysfs.c
+++ b/net/sunrpc/sysfs.c@@ -111,6 +111,49 @@ static ssize_t rpc_sysfs_xprt_info_show(struct kobject *kobj, return ret + 1; } +static ssize_t rpc_sysfs_xprt_state_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf) +{ + struct rpc_xprt *xprt = rpc_sysfs_xprt_kobj_get_xprt(kobj); + ssize_t ret; + int locked, connected, connecting, close_wait, bound, binding, + closing, congested, cwnd_wait, write_space; + + if (!xprt) + return 0; + + if (!xprt->state) { + ret = sprintf(buf, "state=CLOSED\n"); + } else { + locked = test_bit(XPRT_LOCKED, &xprt->state); + connected = test_bit(XPRT_CONNECTED, &xprt->state); + connecting = test_bit(XPRT_CONNECTING, &xprt->state); + close_wait = test_bit(XPRT_CLOSE_WAIT, &xprt->state); + bound = test_bit(XPRT_BOUND, &xprt->state); + binding = test_bit(XPRT_BINDING, &xprt->state); + closing = test_bit(XPRT_CLOSING, &xprt->state); + congested = test_bit(XPRT_CONGESTED, &xprt->state); + cwnd_wait = test_bit(XPRT_CWND_WAIT, &xprt->state); + write_space = test_bit(XPRT_WRITE_SPACE, &xprt->state); + + ret = sprintf(buf, "state=%s %s %s %s %s %s %s %s %s %s\n", + locked ? "LOCKED" : "", + connected ? "CONNECTED" : "", + connecting ? "CONNECTING" : "", + close_wait ? "CLOSE_WAIT" : "", + bound ? "BOUND" : "", + binding ? "BOUNDING" : "", + closing ? "CLOSING" : "", + congested ? "CONGESTED" : "", + cwnd_wait ? "CWND_WAIT" : "", + write_space ? "WRITE_SPACE" : ""); + } + + xprt_put(xprt); + return ret + 1; +} + static ssize_t rpc_sysfs_xprt_switch_info_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
@@ -249,9 +292,13 @@ static struct kobj_attribute rpc_sysfs_xprt_dstaddr = __ATTR(dstaddr, static struct kobj_attribute rpc_sysfs_xprt_info = __ATTR(xprt_info, 0444, rpc_sysfs_xprt_info_show, NULL); +static struct kobj_attribute rpc_sysfs_xprt_change_state = __ATTR(xprt_state, + 0644, rpc_sysfs_xprt_state_show, NULL); + static struct attribute *rpc_sysfs_xprt_attrs[] = { &rpc_sysfs_xprt_dstaddr.attr, &rpc_sysfs_xprt_info.attr, + &rpc_sysfs_xprt_change_state.attr, NULL, };
--
2.27.0