bdev/nvme: replace nn with mnan in ana_log size calculation

Calculation of the ANA log page size should use the
identify ctrl MNAN field
(maximum number of allowed namespaces)
not the NN (maximum valid nsid value).

An ANA-enabled controller must have a non-zero MNAN value,
see NVMe Base Specification, Figure 251,
therefore nvme_ctrlr_init_ana_log_page() may safely use MNAN.

Since NN might be much higher than MNAN,
ANA log size based on NN may results in a very large
log page and cause a failure to get ANA log,
e.g. if it is larger than the controller's MDTS.

Fix: replace cdata->nn with cdata->mnan
in nvme_ctrlr_init_ana_log_page()

Signed-off-by: Anton Eidelman <anton@lightbitslabs.com>
Change-Id: I2a522dca833a27dddad25848d7688efa23d23091
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/13039
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <smatsumoto@nvidia.com>
Reviewed-by: Jacek Kalwas <jacek.kalwas@intel.com>
This commit is contained in:
Anton Eidelman 2022-06-14 12:55:45 -06:00 committed by Tomasz Zawadzki
parent a773ed9a9a
commit 0b9100e8a5
2 changed files with 2 additions and 1 deletions

View File

@ -3898,7 +3898,7 @@ nvme_ctrlr_init_ana_log_page(struct nvme_ctrlr *nvme_ctrlr,
cdata = spdk_nvme_ctrlr_get_data(ctrlr);
ana_log_page_size = sizeof(struct spdk_nvme_ana_page) + cdata->nanagrpid *
sizeof(struct spdk_nvme_ana_group_descriptor) + cdata->nn *
sizeof(struct spdk_nvme_ana_group_descriptor) + cdata->mnan *
sizeof(uint32_t);
nvme_ctrlr->ana_log_page = spdk_zmalloc(ana_log_page_size, 64, NULL,

View File

@ -407,6 +407,7 @@ ut_attach_ctrlr(const struct spdk_nvme_transport_id *trid, uint32_t num_ns,
}
ctrlr->cdata.nn = num_ns;
ctrlr->cdata.mnan = num_ns;
ctrlr->cdata.nanagrpid = num_ns;
}