From 296dbc72d29085d5fc34430d0760423071e9e81d Mon Sep 17 00:00:00 2001 From: Wouter Verhelst Date: Mon, 12 Aug 2024 15:20:42 +0200 Subject: [PATCH] nbd: correct the maximum value for discard sectors The version of the NBD protocol implemented by the kernel driver currently has a 32 bit field for length values. As the NBD protocol uses bytes as a unit of length, length values larger than 2^32 bytes cannot be expressed. Update the max_hw_discard_sectors field to match that. Signed-off-by: Wouter Verhelst Fixes: 268283244c0f ("nbd: use the atomic queue limits API in nbd_set_size") Reviewed-by: Damien Le Moal Cc: Eric Blake Link: https://lore.kernel.org/r/20240812133032.115134-8-w@uter.be Signed-off-by: Jens Axboe --- drivers/block/nbd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 18b94d7c795ae..b852050d8a966 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -350,7 +350,7 @@ static int __nbd_set_size(struct nbd_device *nbd, loff_t bytesize, lim = queue_limits_start_update(nbd->disk->queue); if (nbd->config->flags & NBD_FLAG_SEND_TRIM) - lim.max_hw_discard_sectors = UINT_MAX; + lim.max_hw_discard_sectors = UINT_MAX >> SECTOR_SHIFT; else lim.max_hw_discard_sectors = 0; if (!(nbd->config->flags & NBD_FLAG_SEND_FLUSH)) { -- 2.50.1