Commit Graph

1 Commits (4fa512406bf993a570759a0c5deed20d639e51c8)

Author SHA1 Message Date
Benoît Knecht 41ba6536cf
facts/hardware: Fix support_discard block device fact (#83480)
Previously, `support_discard` simply returned the value of
`/sys/block/{device}/queue/discard_granularity`. When its value is `0`, then
the block device doesn't support discards; _however_, it being greater than
zero doesn't necessarily mean that the block device _does_ support discards.

But another indication that a block device doesn't support discards is
`/sys/block/{device}/queue/discard_max_hw_bytes` being equal to `0` (with the
same caveat as above). So if either of those are `0`, set `support_discard` to
zero, otherwise set it to the value of `discard_granularity` for backwards
compatibility.

Signed-off-by: Benoît Knecht <bknecht@protonmail.ch>
5 months ago