lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date:   Wed,  8 Mar 2023 09:18:07 +0800
From:   Chao Yu <chao@...nel.org>
To:     tytso@....edu, adilger.kernel@...ger.ca
Cc:     linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
        Chao Yu <chao@...nel.org>
Subject: [PATCH] ext4: fix to report fstrim.minlen back to userspace

Quoted from manual of fstrim:

"-m, --minimum minimum-size
	..., if it's smaller than the device's minimum, and report that
(fstrim_range.minlen) back to userspace."

So this patch tries to report adjusted fstrim_range.minlen back to
userspace via FITRIM interface, if the value is smaller than device's
minimum discard granularity.

Signed-off-by: Chao Yu <chao@...nel.org>
---
 fs/ext4/mballoc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 5b2ae37a8b80..bd3ef29cf8a6 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -6491,6 +6491,9 @@ int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range)
 				discard_granularity >> sb->s_blocksize_bits);
 		if (minlen > EXT4_CLUSTERS_PER_GROUP(sb))
 			goto out;
+
+		/* Report adjusted minlen back to userspace */
+		range->minlen = minlen;
 	}
 	if (end >= max_blks - 1) {
 		end = max_blks - 1;
-- 
2.25.1

Powered by blists - more mailing lists