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| author | Amit Engel <amit.engel@dell.com> | 2020-09-16 19:47:20 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2020-09-27 09:14:19 +0200 |
| commit | 4e683c48db018e72e81e1e0d12a5020d29be561a (patch) | |
| tree | 45fd33a1f9b194a8b47cb293b0f8dbec9bffa880 /drivers/nvme | |
| parent | nvmet-tcp: have queue io_work context run on sock incoming cpu (diff) | |
| download | linux-4e683c48db018e72e81e1e0d12a5020d29be561a.tar.xz linux-4e683c48db018e72e81e1e0d12a5020d29be561a.zip | |
nvmet: handle keep-alive timer when kato is modified by a set features cmd
A user may modify the kato by a set features cmd. To properly deal
with races or a kato value of 0 (no keep alive enabled) change
nvmet_set_feat_kato to first disable the timer, then set the value
and then re-enable the timer.
Signed-off-by: Amit Engel <amit.engel@dell.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/target/admin-cmd.c | 2 | ||||
| -rw-r--r-- | drivers/nvme/target/core.c | 4 | ||||
| -rw-r--r-- | drivers/nvme/target/nvmet.h | 2 |
3 files changed, 6 insertions, 2 deletions
diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c index e9fe91786bbb..dca34489a1dc 100644 --- a/drivers/nvme/target/admin-cmd.c +++ b/drivers/nvme/target/admin-cmd.c @@ -727,7 +727,9 @@ u16 nvmet_set_feat_kato(struct nvmet_req *req) { u32 val32 = le32_to_cpu(req->cmd->common.cdw11); + nvmet_stop_keep_alive_timer(req->sq->ctrl); req->sq->ctrl->kato = DIV_ROUND_UP(val32, 1000); + nvmet_start_keep_alive_timer(req->sq->ctrl); nvmet_set_result(req, req->sq->ctrl->kato); diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c index b7b63330b5ef..25d62d867563 100644 --- a/drivers/nvme/target/core.c +++ b/drivers/nvme/target/core.c @@ -395,7 +395,7 @@ static void nvmet_keep_alive_timer(struct work_struct *work) nvmet_ctrl_fatal_error(ctrl); } -static void nvmet_start_keep_alive_timer(struct nvmet_ctrl *ctrl) +void nvmet_start_keep_alive_timer(struct nvmet_ctrl *ctrl) { if (unlikely(ctrl->kato == 0)) return; @@ -407,7 +407,7 @@ static void nvmet_start_keep_alive_timer(struct nvmet_ctrl *ctrl) schedule_delayed_work(&ctrl->ka_work, ctrl->kato * HZ); } -static void nvmet_stop_keep_alive_timer(struct nvmet_ctrl *ctrl) +void nvmet_stop_keep_alive_timer(struct nvmet_ctrl *ctrl) { if (unlikely(ctrl->kato == 0)) return; diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h index 47ee3fb193bd..559a15ccc322 100644 --- a/drivers/nvme/target/nvmet.h +++ b/drivers/nvme/target/nvmet.h @@ -395,6 +395,8 @@ void nvmet_get_feat_async_event(struct nvmet_req *req); u16 nvmet_set_feat_kato(struct nvmet_req *req); u16 nvmet_set_feat_async_event(struct nvmet_req *req, u32 mask); void nvmet_execute_async_event(struct nvmet_req *req); +void nvmet_start_keep_alive_timer(struct nvmet_ctrl *ctrl); +void nvmet_stop_keep_alive_timer(struct nvmet_ctrl *ctrl); u16 nvmet_parse_connect_cmd(struct nvmet_req *req); void nvmet_bdev_set_limits(struct block_device *bdev, struct nvme_id_ns *id); |