linux-kernel - [PATCH] erofs: clean up the cache if cached decompression is disabled

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Message-Id: <20241112031513.528474-1-guochunhai@vivo.com>
Date: Mon, 11 Nov 2024 20:15:13 -0700
From: Chunhai Guo <guochunhai@...o.com>
To: xiang@...nel.org
Cc: chao@...nel.org,
	huyue2@...lpad.com,
	jefflexu@...ux.alibaba.com,
	dhavale@...gle.com,
	linux-erofs@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org,
	Chunhai Guo <guochunhai@...o.com>
Subject: [PATCH] erofs: clean up the cache if cached decompression is disabled

Clean up the cache when cached decompression strategy is changed to
EROFS_ZIP_CACHE_DISABLED by remount.

Signed-off-by: Chunhai Guo <guochunhai@...o.com>
---
 fs/erofs/super.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index 320d586c3896..de2af862e65b 100644
--- a/fs/erofs/super.c
+++ b/fs/erofs/super.c
@@ -743,6 +743,11 @@ static int erofs_fc_reconfigure(struct fs_context *fc)
 	else
 		fc->sb_flags &= ~SB_POSIXACL;
 
+	if (new_sbi->opt.cache_strategy == EROFS_ZIP_CACHE_DISABLED) {
+		mutex_lock(&sbi->umount_mutex);
+		z_erofs_shrink_scan(sbi, ~0UL);
+		mutex_unlock(&sbi->umount_mutex);
+	}
 	sbi->opt = new_sbi->opt;
 
 	fc->sb_flags |= SB_RDONLY;
-- 
2.34.1