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| author | Sagi Grimberg <sagi@grimberg.me> | 2018-11-02 10:28:13 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-12-07 22:26:56 -0700 |
| commit | c09305ae49970e15cd18828c0f78b766e8cf224f (patch) | |
| tree | a6056f345fd79a895cd62e17be2e3e70ea365187 /drivers/nvme/target/core.c | |
| parent | 6e3ca03ee934572d5de4fb2224c01e12c4d422c8 (diff) | |
| download | linux-c09305ae49970e15cd18828c0f78b766e8cf224f.tar.gz linux-c09305ae49970e15cd18828c0f78b766e8cf224f.tar.bz2 linux-c09305ae49970e15cd18828c0f78b766e8cf224f.zip | |
nvmet: support for traffic based keep-alive
A controller that supports traffic based keep-alive can restart the keep
alive timer even when no keep-alive was not received in the kato period
as long as other admin or I/O commands were received. For each command
set ctrl->cmd_seen to true, and when keep-alive timer expires, if any
commands were seen, resched ka_work instead of escalating to a fatal
error.
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/nvme/target/core.c')
| -rw-r--r-- | drivers/nvme/target/core.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c index a5f9bbce863f..05d8d9bc058f 100644 --- a/drivers/nvme/target/core.c +++ b/drivers/nvme/target/core.c @@ -299,6 +299,15 @@ static void nvmet_keep_alive_timer(struct work_struct *work) { struct nvmet_ctrl *ctrl = container_of(to_delayed_work(work), struct nvmet_ctrl, ka_work); + bool cmd_seen = ctrl->cmd_seen; + + ctrl->cmd_seen = false; + if (cmd_seen) { + pr_debug("ctrl %d reschedule traffic based keep-alive timer\n", + ctrl->cntlid); + schedule_delayed_work(&ctrl->ka_work, ctrl->kato * HZ); + return; + } pr_err("ctrl %d keep-alive timer (%d seconds) expired!\n", ctrl->cntlid, ctrl->kato); @@ -801,6 +810,9 @@ bool nvmet_req_init(struct nvmet_req *req, struct nvmet_cq *cq, goto fail; } + if (sq->ctrl) + sq->ctrl->cmd_seen = true; + return true; fail: |