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| author | Hannes Reinecke <hare@suse.de> | 2021-08-24 16:57:42 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2021-09-06 09:59:02 +0200 |
| commit | e7d65803e2bb5bc739548b67a5fc72c626cf7e3b (patch) | |
| tree | 0543aa044f37dfc1ee05ea267ae79dc4e6bede54 /drivers/nvme/host/nvme.h | |
| parent | d32d3d0b47f7e34560ae3c55ddfcf68694813501 (diff) | |
| download | linux-e7d65803e2bb5bc739548b67a5fc72c626cf7e3b.tar.bz2 | |
nvme-multipath: revalidate paths during rescan
When triggering a rescan due to a namespace resize we will be
receiving AENs on every controller, triggering a rescan of all
attached namespaces. If multipath is active only the current path and
the ns_head disk will be updated, the other paths will still refer to
the old size until AENs for the remaining controllers are received.
If I/O comes in before that it might be routed to one of the old
paths, triggering an I/O failure with 'access beyond end of device'.
With this patch the old paths are skipped from multipath path
selection until the controller serving these paths has been rescanned.
Signed-off-by: Hannes Reinecke <hare@suse.de>
[dwagner: - introduce NVME_NS_READY flag instead of NVME_NS_INVALIDATE
- use 'revalidate' instead of 'invalidate' which
follows the zoned device code path.
- clear NVME_NS_READY before clearing current_path]
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme/host/nvme.h')
| -rw-r--r-- | drivers/nvme/host/nvme.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index a2e1f298b217..8fd30ef19757 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -456,6 +456,7 @@ struct nvme_ns { #define NVME_NS_DEAD 1 #define NVME_NS_ANA_PENDING 2 #define NVME_NS_FORCE_RO 3 +#define NVME_NS_READY 4 struct cdev cdev; struct device cdev_device; @@ -748,6 +749,7 @@ void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl); void nvme_mpath_uninit(struct nvme_ctrl *ctrl); void nvme_mpath_stop(struct nvme_ctrl *ctrl); bool nvme_mpath_clear_current_path(struct nvme_ns *ns); +void nvme_mpath_revalidate_paths(struct nvme_ns *ns); void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl); void nvme_mpath_shutdown_disk(struct nvme_ns_head *head); @@ -795,6 +797,9 @@ static inline bool nvme_mpath_clear_current_path(struct nvme_ns *ns) { return false; } +static inline void nvme_mpath_revalidate_paths(struct nvme_ns *ns) +{ +} static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl) { } |