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| author |  Sagi Grimberg <sagi@grimberg.me>
| 2024-04-28 12:25:40 +0300 |
|---|---|---|
| committer |  Keith Busch <kbusch@kernel.org>
| 2024-05-01 02:58:43 -0700 |
| commit | 505363957fad35f7aed9a2b0d8dad73451a80fb5 (patch) | |
| tree | 9001d58a8cfb109cd948308d5d0d4c0c7dd539df /drivers | |
| parent | nvmet-tcp: fix possible memory leak when tearing down a controller (diff) | |
| download | linux-505363957fad35f7aed9a2b0d8dad73451a80fb5.tar.gz linux-505363957fad35f7aed9a2b0d8dad73451a80fb5.tar.bz2 linux-505363957fad35f7aed9a2b0d8dad73451a80fb5.zip | |
nvmet: fix nvme status code when namespace is disabled
If the user disabled a nvmet namespace, it is removed from the subsystem
namespaces list. When nvmet processes a command directed to an nsid that
was disabled, it cannot differentiate between a nsid that is disabled
vs. a non-existent namespace, and resorts to return NVME_SC_INVALID_NS
with the dnr bit set.
This translates to a non-retryable status for the host, which translates
to a user error. We should expect disabled namespaces to not cause an
I/O error in a multipath environment.
Address this by searching a configfs item for the namespace nvmet failed
to find, and if we found one, conclude that the namespace is disabled
(perhaps temporarily). Return NVME_SC_INTERNAL_PATH_ERROR in this case
and keep DNR bit cleared.
Reported-by: Jirong Feng <jirong.feng@easystack.cn>
Tested-by: Jirong Feng <jirong.feng@easystack.cn>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/nvme/target/configfs.c | 13 | ||||
| -rw-r--r-- | drivers/nvme/target/core.c | 5 | ||||
| -rw-r--r-- | drivers/nvme/target/nvmet.h | 1 |
3 files changed, 18 insertions, 1 deletions
diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c index a2325330bf22..89a001101a7f 100644 --- a/drivers/nvme/target/configfs.c +++ b/drivers/nvme/target/configfs.c @@ -754,6 +754,19 @@ static struct configfs_attribute *nvmet_ns_attrs[] = { NULL, }; +bool nvmet_subsys_nsid_exists(struct nvmet_subsys *subsys, u32 nsid) +{ + struct config_item *ns_item; + char name[4] = {}; + + if (sprintf(name, "%u", nsid) <= 0) + return false; + mutex_lock(&subsys->namespaces_group.cg_subsys->su_mutex); + ns_item = config_group_find_item(&subsys->namespaces_group, name); + mutex_unlock(&subsys->namespaces_group.cg_subsys->su_mutex); + return ns_item != NULL; +} + static void nvmet_ns_release(struct config_item *item) { struct nvmet_ns *ns = to_nvmet_ns(item); diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c index 8860a3eb71ec..e06013c5dace 100644 --- a/drivers/nvme/target/core.c +++ b/drivers/nvme/target/core.c @@ -437,10 +437,13 @@ void nvmet_stop_keep_alive_timer(struct nvmet_ctrl *ctrl) u16 nvmet_req_find_ns(struct nvmet_req *req) { u32 nsid = le32_to_cpu(req->cmd->common.nsid); + struct nvmet_subsys *subsys = nvmet_req_subsys(req); - req->ns = xa_load(&nvmet_req_subsys(req)->namespaces, nsid); + req->ns = xa_load(&subsys->namespaces, nsid); if (unlikely(!req->ns)) { req->error_loc = offsetof(struct nvme_common_command, nsid); + if (nvmet_subsys_nsid_exists(subsys, nsid)) + return NVME_SC_INTERNAL_PATH_ERROR; return NVME_SC_INVALID_NS | NVME_SC_DNR; } diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h index f460728e1df1..c1306de1f4dd 100644 --- a/drivers/nvme/target/nvmet.h +++ b/drivers/nvme/target/nvmet.h @@ -543,6 +543,7 @@ void nvmet_subsys_disc_changed(struct nvmet_subsys *subsys, struct nvmet_host *host); void nvmet_add_async_event(struct nvmet_ctrl *ctrl, u8 event_type, u8 event_info, u8 log_page); +bool nvmet_subsys_nsid_exists(struct nvmet_subsys *subsys, u32 nsid); #define NVMET_MIN_QUEUE_SIZE 16 #define NVMET_MAX_QUEUE_SIZE 1024 |