From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Ming Lei <ming.lei@redhat.com>, Christoph Hellwig <hch@lst.de>,
Vivek Goyal <vgoyal@redhat.com>, Pei Zhang <pezhang@redhat.com>,
Jens Axboe <axboe@kernel.dk>, Sasha Levin <sashal@kernel.org>,
linux-block@vger.kernel.org
Subject: [PATCH AUTOSEL 5.15 10/28] block: loop:use kstatfs.f_bsize of backing file to set discard granularity
Date: Tue, 22 Feb 2022 21:29:11 -0500 [thread overview]
Message-ID: <20220223022929.241127-10-sashal@kernel.org> (raw)
In-Reply-To: <20220223022929.241127-1-sashal@kernel.org>
From: Ming Lei <ming.lei@redhat.com>
[ Upstream commit 06582bc86d7f48d35cd044098ca1e246e8c7c52e ]
If backing file's filesystem has implemented ->fallocate(), we think the
loop device can support discard, then pass sb->s_blocksize as
discard_granularity. However, some underlying FS, such as overlayfs,
doesn't set sb->s_blocksize, and causes discard_granularity to be set as
zero, then the warning in __blkdev_issue_discard() is triggered.
Christoph suggested to pass kstatfs.f_bsize as discard granularity, and
this way is fine because kstatfs.f_bsize means 'Optimal transfer block
size', which still matches with definition of discard granularity.
So fix the issue by setting discard_granularity as kstatfs.f_bsize if it
is available, otherwise claims discard isn't supported.
Cc: Christoph Hellwig <hch@lst.de>
Cc: Vivek Goyal <vgoyal@redhat.com>
Reported-by: Pei Zhang <pezhang@redhat.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220126035830.296465-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/block/loop.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index c00ae30fde89e..92f9d32bfae5e 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -79,6 +79,7 @@
#include <linux/ioprio.h>
#include <linux/blk-cgroup.h>
#include <linux/sched/mm.h>
+#include <linux/statfs.h>
#include "loop.h"
@@ -939,8 +940,13 @@ static void loop_config_discard(struct loop_device *lo)
granularity = 0;
} else {
+ struct kstatfs sbuf;
+
max_discard_sectors = UINT_MAX >> 9;
- granularity = inode->i_sb->s_blocksize;
+ if (!vfs_statfs(&file->f_path, &sbuf))
+ granularity = sbuf.f_bsize;
+ else
+ max_discard_sectors = 0;
}
if (max_discard_sectors) {
--
2.34.1
next prev parent reply other threads:[~2022-02-23 2:31 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-23 2:29 [PATCH AUTOSEL 5.15 01/28] mac80211_hwsim: report NOACK frames in tx_status Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 02/28] mac80211_hwsim: initialize ieee80211_tx_info at hw_scan_work Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 03/28] i2c: bcm2835: Avoid clock stretching timeouts Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 04/28] ASoC: rt5668: do not block workqueue if card is unbound Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 05/28] ASoC: rt5682: " Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 06/28] regulator: core: fix false positive in regulator_late_cleanup() Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 07/28] Input: clear BTN_RIGHT/MIDDLE on buttonpads Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 08/28] btrfs: get rid of warning on transaction commit when using flushoncommit Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 09/28] KVM: arm64: vgic: Read HW interrupt pending state from the HW Sasha Levin
2022-02-23 2:29 ` Sasha Levin [this message]
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 11/28] tipc: fix a bit overflow in tipc_crypto_key_rcv() Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 12/28] cifs: do not use uninitialized data in the owner/group sid Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 13/28] cifs: fix double free race when mount fails in cifs_get_root() Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 14/28] USB: zaurus: support another broken Zaurus Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 15/28] HID: amd_sfh: Handle amd_sfh work buffer in PM ops Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 16/28] HID: amd_sfh: Add functionality to clear interrupts Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 17/28] HID: amd_sfh: Add interrupt handler to process interrupts Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 18/28] cifs: modefromsids must add an ACE for authenticated users Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 19/28] selftests/seccomp: Fix seccomp failure by adding missing headers Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 20/28] drm/amd/pm: correct UMD pstate clocks for Dimgrey Cavefish and Beige Goby Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 21/28] selftests/ftrace: Do not trace do_softirq because of PREEMPT_RT Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 22/28] dmaengine: shdma: Fix runtime PM imbalance on error Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 23/28] i2c: cadence: allow COMPILE_TEST Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 24/28] i2c: imx: " Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 25/28] i2c: qup: " Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 26/28] CDC-NCM: avoid overflow in sanity checking Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 27/28] net: usb: cdc_mbim: avoid altsetting toggling for Telit FN990 Sasha Levin
2022-02-23 2:29 ` [PATCH AUTOSEL 5.15 28/28] block-map: add __GFP_ZERO flag for alloc_page in function bio_copy_kern Sasha Levin
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