| Message ID | 53e2ab90d83d4cdc15f1b48b2eb671ad26f54a6a.1701788600.git.bcodding@redhat.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [1/2] blocklayoutdriver: Fix reference leak of pnfs_device_node | expand |
On Tue, Dec 05, 2023 at 10:05:02AM -0500, Benjamin Coddington wrote: > We noticed a SCSI device that refused to allow READ CAPACITY when the > device had a PR with exclusive access, registrants only. The result of > this situation is that the blocklayout driver adds a pnfs_block_dev of zero > length which always fails the offset_in_map tests. Instead of continuously > trying to do pNFS for this case, just mark the device as unavailable which > will allow the client to fallback to the MDS for the duration of > PNFS_DEVICE_RETRY_TIMEOUT. Looks good: Reviewed-by: Christoph Hellwig <hch@lst.de>
diff --git a/fs/nfs/blocklayout/dev.c b/fs/nfs/blocklayout/dev.c index f318a05a80e1..c97ebc42ec0f 100644 --- a/fs/nfs/blocklayout/dev.c +++ b/fs/nfs/blocklayout/dev.c @@ -351,6 +351,9 @@ bl_parse_scsi(struct nfs_server *server, struct pnfs_block_dev *d, d->map = bl_map_simple; d->pr_key = v->scsi.pr_key; + if (d->len == 0) + return -ENODEV; + pr_info("pNFS: using block device %s (reservation key 0x%llx)\n", d->bdev_handle->bdev->bd_disk->disk_name, d->pr_key);
We noticed a SCSI device that refused to allow READ CAPACITY when the device had a PR with exclusive access, registrants only. The result of this situation is that the blocklayout driver adds a pnfs_block_dev of zero length which always fails the offset_in_map tests. Instead of continuously trying to do pNFS for this case, just mark the device as unavailable which will allow the client to fallback to the MDS for the duration of PNFS_DEVICE_RETRY_TIMEOUT. Signed-off-by: Benjamin Coddington <bcodding@redhat.com> --- fs/nfs/blocklayout/dev.c | 3 +++ 1 file changed, 3 insertions(+)