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| author | Santosh Pradhan <santosh.pradhan@ionos.com> | 2022-08-18 12:55:51 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-08-22 07:52:51 -0600 |
| commit | 74e237b6e7421157cc378eee6641b818cea8129d (patch) | |
| tree | bb2478d874a936900617e992f0ca3bebabcfd707 /drivers/block/rnbd/rnbd-srv.c | |
| parent | c6ea70604249bc357ce09e9f8e16c29df0fb2fa2 (diff) | |
| download | linux-74e237b6e7421157cc378eee6641b818cea8129d.tar.bz2 | |
block/rnbd-srv: Add event tracing support
Add event tracing mechanism for following routines:
- create_sess()
- destroy_sess()
- process_rdma()
- process_msg_sess_info()
- process_msg_open()
- process_msg_close()
How to use:
1. Load the rnbd_server module
2. cd /sys/kernel/debug/tracing
3. If all the events need to be enabled:
echo 1 > events/rnbd_srv/enable
4. OR only speific routine/event needs to be enabled e.g.
echo 1 > events/rnbd_srv/create_sess/enable
5. cat trace
5. Run some workload which can trigger create_sess() routine/event
Signed-off-by: Santosh Pradhan <santosh.pradhan@ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Md Haris Iqbal <haris.iqbal@ionos.com>
Link: https://lore.kernel.org/r/20220818105551.110490-2-haris.iqbal@ionos.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/rnbd/rnbd-srv.c')
| -rw-r--r-- | drivers/block/rnbd/rnbd-srv.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/block/rnbd/rnbd-srv.c b/drivers/block/rnbd/rnbd-srv.c index 5e08da277ddf..3f6c268e04ef 100644 --- a/drivers/block/rnbd/rnbd-srv.c +++ b/drivers/block/rnbd/rnbd-srv.c @@ -14,6 +14,7 @@ #include "rnbd-srv.h" #include "rnbd-srv-dev.h" +#include "rnbd-srv-trace.h" MODULE_DESCRIPTION("RDMA Network Block Device Server"); MODULE_LICENSE("GPL"); @@ -132,6 +133,8 @@ static int process_rdma(struct rnbd_srv_session *srv_sess, struct bio *bio; short prio; + trace_process_rdma(srv_sess, msg, id, datalen, usrlen); + priv = kmalloc(sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; @@ -244,6 +247,8 @@ static void destroy_sess(struct rnbd_srv_session *srv_sess) if (xa_empty(&srv_sess->index_idr)) goto out; + trace_destroy_sess(srv_sess); + mutex_lock(&srv_sess->lock); xa_for_each(&srv_sess->index_idr, index, sess_dev) rnbd_srv_destroy_dev_session_sysfs(sess_dev); @@ -290,6 +295,8 @@ static int create_sess(struct rtrs_srv_sess *rtrs) rtrs_srv_set_sess_priv(rtrs, srv_sess); + trace_create_sess(srv_sess); + return 0; } @@ -339,6 +346,8 @@ static int process_msg_close(struct rnbd_srv_session *srv_sess, const struct rnbd_msg_close *close_msg = usr; struct rnbd_srv_sess_dev *sess_dev; + trace_process_msg_close(srv_sess, close_msg); + sess_dev = rnbd_get_sess_dev(le32_to_cpu(close_msg->device_id), srv_sess); if (IS_ERR(sess_dev)) @@ -643,9 +652,8 @@ static int process_msg_sess_info(struct rnbd_srv_session *srv_sess, struct rnbd_msg_sess_info_rsp *rsp = data; srv_sess->ver = min_t(u8, sess_info_msg->ver, RNBD_PROTO_VER_MAJOR); - pr_debug("Session %s using protocol version %d (client version: %d, server version: %d)\n", - srv_sess->sessname, srv_sess->ver, - sess_info_msg->ver, RNBD_PROTO_VER_MAJOR); + + trace_process_msg_sess_info(srv_sess, sess_info_msg); rsp->hdr.type = cpu_to_le16(RNBD_MSG_SESS_INFO_RSP); rsp->ver = srv_sess->ver; @@ -690,9 +698,8 @@ static int process_msg_open(struct rnbd_srv_session *srv_sess, struct rnbd_dev *rnbd_dev; struct rnbd_msg_open_rsp *rsp = data; - pr_debug("Open message received: session='%s' path='%s' access_mode=%d\n", - srv_sess->sessname, open_msg->dev_name, - open_msg->access_mode); + trace_process_msg_open(srv_sess, open_msg); + open_flags = FMODE_READ; if (open_msg->access_mode != RNBD_ACCESS_RO) open_flags |= FMODE_WRITE; |