From: Jan Kara <jack@suse.cz>
To: <linux-ext4@vger.kernel.org>
Cc: Jan Kara <jack@suse.cz>
Subject: [PATCH 1/2] ext2: Correct maximum ext2 filesystem block size
Date: Wed, 1 Mar 2023 12:12:30 +0100 [thread overview]
Message-ID: <20230301111238.22856-1-jack@suse.cz> (raw)
In-Reply-To: <20230301111026.15102-1-jack@suse.cz>
Ext2 has traditionally supported filesystem block sizes upto page size
or upto 65536. Macro EXT2_MAX_BLOCK_SIZE is set to 4096, however that is
never used in ext2 so practically we always allowed whatever
sb_set_blocksize() accepted. Fix value of EXT2_MAX_BLOCK_SIZE because it
will be used in the next patch.
Signed-off-by: Jan Kara <jack@suse.cz>
---
fs/ext2/ext2.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index cb78d7dcfb95..6c8e838bb278 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -178,7 +178,7 @@ static inline struct ext2_sb_info *EXT2_SB(struct super_block *sb)
* Macro-instructions used to manage several block sizes
*/
#define EXT2_MIN_BLOCK_SIZE 1024
-#define EXT2_MAX_BLOCK_SIZE 4096
+#define EXT2_MAX_BLOCK_SIZE 65536
#define EXT2_MIN_BLOCK_LOG_SIZE 10
#define EXT2_BLOCK_SIZE(s) ((s)->s_blocksize)
#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32))
--
2.35.3
next prev parent reply other threads:[~2023-03-01 11:12 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-01 11:12 [PATCH 0/2] ext2: Refuse filesystems with invalid block size Jan Kara
2023-03-01 11:12 ` Jan Kara [this message]
2023-03-01 11:12 ` [PATCH 2/2] ext2: Check block size validity during mount Jan Kara
2023-03-01 11:37 ` Tudor Ambarus
2023-03-01 13:05 ` Jan Kara
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