From 27ca8273fda398638ca994a207323a85b6d81190 Mon Sep 17 00:00:00 2001
From: Andrew Price <anprice@redhat.com>
Date: Tue, 22 Mar 2022 19:05:51 +0000
Subject: [PATCH] gfs2: Make sure FITRIM minlen is rounded up to fs block size
Git-commit: 27ca8273fda398638ca994a207323a85b6d81190
Patch-mainline: v5.18-rc1
References: git-fixes
Per fstrim(8) we must round up the minlen argument to the fs block size.
The current calculation doesn't take into account devices that have a
discard granularity and requested minlen less than 1 fs block, so the
value can get shifted away to zero in the translation to fs blocks.
The zero minlen passed to gfs2_rgrp_send_discards() then allows
sb_issue_discard() to be called with nr_sects == 0 which returns -EINVAL
and results in gfs2_rgrp_send_discards() returning -EIO.
Make sure minlen is never < 1 fs block by taking the max of the
requested minlen and the fs block size before comparing to the device's
discard granularity and shifting to fs blocks.
Fixes: 076f0faa764ab ("GFS2: Fix FITRIM argument handling")
Signed-off-by: Andrew Price <anprice@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Acked-by: Anthony Iliopoulos <ailiop@suse.com>
---
fs/gfs2/rgrp.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 9df8a84f85a6..801ad9f4f2be 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -1417,7 +1417,8 @@ int gfs2_fitrim(struct file *filp, void __user *argp)
start = r.start >> bs_shift;
end = start + (r.len >> bs_shift);
- minlen = max_t(u64, r.minlen,
+ minlen = max_t(u64, r.minlen, sdp->sd_sb.sb_bsize);
+ minlen = max_t(u64, minlen,
q->limits.discard_granularity) >> bs_shift;
if (end <= start || minlen > sdp->sd_max_rg_data)
--
2.43.0