diff options
| author | Christoph Hellwig <hch@lst.de> | 2017-08-17 14:10:00 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2017-08-29 10:23:04 +0200 |
| commit | 1d5df6af8c7469f9ae3e66e7bed0782cfe4f95db (patch) | |
| tree | 51a42a4473f95212102380d2eced64e970a1576c | |
| parent | cdbff4f26bd9fab11bfac22097f836892a5c3612 (diff) | |
| download | talos-obmc-linux-1d5df6af8c7469f9ae3e66e7bed0782cfe4f95db.tar.gz talos-obmc-linux-1d5df6af8c7469f9ae3e66e7bed0782cfe4f95db.zip | |
nvme: don't blindly overwrite identifiers on disk revalidate
Instead validate that these identifiers do not change, as that is
prohibited by the specification.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
| -rw-r--r-- | drivers/nvme/host/core.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index b87cf3a6e9ac..b0dd58db110e 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -1236,6 +1236,8 @@ static int nvme_revalidate_disk(struct gendisk *disk) struct nvme_ns *ns = disk->private_data; struct nvme_ctrl *ctrl = ns->ctrl; struct nvme_id_ns *id; + u8 eui64[8] = { 0 }, nguid[16] = { 0 }; + uuid_t uuid = uuid_null; int ret = 0; if (test_bit(NVME_NS_DEAD, &ns->flags)) { @@ -1252,7 +1254,15 @@ static int nvme_revalidate_disk(struct gendisk *disk) goto out; } - nvme_report_ns_ids(ctrl, ns->ns_id, id, ns->eui, ns->nguid, &ns->uuid); + nvme_report_ns_ids(ctrl, ns->ns_id, id, eui64, nguid, &uuid); + if (!uuid_equal(&ns->uuid, &uuid) || + memcmp(&ns->nguid, &nguid, sizeof(ns->nguid)) || + memcmp(&ns->eui, &eui64, sizeof(ns->eui))) { + dev_err(ctrl->device, + "identifiers changed for nsid %d\n", ns->ns_id); + ret = -ENODEV; + } + out: kfree(id); return ret; |
