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nvmet: check that host sqsize does not exceed ctrl MQES

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Check that host sqsize is not greater-than Maximum Queue Entries
Supported (MQES) value supported by the controller.

Signed-off-by: Amit Engel <amit.engel@dell.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Amit Engel 2021-08-05 18:02:51 +03:00 committed by Christoph Hellwig
parent b71df12605
commit e19e9f47f3
1 changed files with 9 additions and 0 deletions
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9
drivers/nvme/target/fabrics-cmd.c
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@ -109,6 +109,7 @@ static u16 nvmet_install_queue(struct nvmet_ctrl *ctrl, struct nvmet_req *req)
u16 qid = le16_to_cpu(c->qid);
u16 sqsize = le16_to_cpu(c->sqsize);
struct nvmet_ctrl *old;
u16 mqes = NVME_CAP_MQES(ctrl->cap);
u16 ret;
if (!sqsize) {
@ -125,6 +126,14 @@ static u16 nvmet_install_queue(struct nvmet_ctrl *ctrl, struct nvmet_req *req)
return NVME_SC_CMD_SEQ_ERROR | NVME_SC_DNR;
}
if (sqsize > mqes) {
pr_warn("sqsize %u is larger than MQES supported %u cntlid %d\n",
sqsize, mqes, ctrl->cntlid);
req->error_loc = offsetof(struct nvmf_connect_command, sqsize);
req->cqe->result.u32 = IPO_IATTR_CONNECT_SQE(sqsize);
return NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR;
}
old = cmpxchg(&req->sq->ctrl, NULL, ctrl);
if (old) {
pr_warn("queue already connected!\n");