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| author | Victor Gladkov <Victor.Gladkov@kioxia.com> | 2020-11-24 19:34:59 +0100 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2020-12-01 20:36:37 +0100 |
| commit | 8c4dfea97f15b80097b3f882ca428fb2751ec30c (patch) | |
| tree | 122bcd90a4fb7504e3fc3b2b82bab80184cc7496 /drivers/nvme/host/multipath.c | |
| parent | nvmet: fix a spelling mistake "incuding" -> "including" in Kconfig (diff) | |
| download | linux-8c4dfea97f15b80097b3f882ca428fb2751ec30c.tar.xz linux-8c4dfea97f15b80097b3f882ca428fb2751ec30c.zip | |
nvme-fabrics: reject I/O to offline device
Commands get stuck while Host NVMe-oF controller is in reconnect state.
The controller enters into reconnect state when it loses connection with
the target. It tries to reconnect every 10 seconds (default) until
a successful reconnect or until the reconnect time-out is reached.
The default reconnect time out is 10 minutes.
Applications are expecting commands to complete with success or error
within a certain timeout (30 seconds by default). The NVMe host is
enforcing that timeout while it is connected, but during reconnect the
timeout is not enforced and commands may get stuck for a long period or
even forever.
To fix this long delay due to the default timeout, introduce new
"fast_io_fail_tmo" session parameter. The timeout is measured in seconds
from the controller reconnect and any command beyond that timeout is
rejected. The new parameter value may be passed during 'connect'.
The default value of -1 means no timeout (similar to current behavior).
Signed-off-by: Victor Gladkov <victor.gladkov@kioxia.com>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme/host/multipath.c')
| -rw-r--r-- | drivers/nvme/host/multipath.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index 74896be40c17..71696819c228 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -279,6 +279,8 @@ static bool nvme_available_path(struct nvme_ns_head *head) struct nvme_ns *ns; list_for_each_entry_rcu(ns, &head->list, siblings) { + if (test_bit(NVME_CTRL_FAILFAST_EXPIRED, &ns->ctrl->flags)) + continue; switch (ns->ctrl->state) { case NVME_CTRL_LIVE: case NVME_CTRL_RESETTING: |