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

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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
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2
module/bdev/nvme/bdev_nvme.c
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,

1
test/unit/lib/bdev/nvme/bdev_nvme.c/bdev_nvme_ut.c
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;
}