From d76c769c8db4c321aa4d697e810e0ed0b30bcc91 Mon Sep 17 00:00:00 2001 From: Benjamin Coddington Date: Tue, 5 Dec 2023 10:05:02 -0500 Subject: [PATCH] pnfs/blocklayout: Don't add zero-length pnfs_block_dev 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 Signed-off-by: Anna Schumaker --- fs/nfs/blocklayout/dev.c | 3 +++ 1 file changed, 3 insertions(+) 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);