From: Daniel Rosenberg via Linux-f2fs-devel <linux-f2fs-devel@lists.sourceforge.net>
To: linux-f2fs-devel@lists.sourceforge.net
Cc: Jaegeuk Kim <jaegeuk@kernel.org>,
kernel-team@android.com, linux-kernel@vger.kernel.org,
Daniel Rosenberg <drosen@google.com>
Subject: [f2fs-dev] [PATCH v3] f2fs: Restrict max filesize for 16K f2fs
Date: Mon, 4 Dec 2023 18:38:01 -0800 [thread overview]
Message-ID: <20231205023801.3669458-1-drosen@google.com> (raw)
Blocks are tracked by u32, so the max permitted filesize is
(U32_MAX + 1) * BLOCK_SIZE. Additionally, in order to support crypto
data unit sizes of 4K with a 16K block with IV_INO_LBLK_{32,64}, we must
further restrict max filesize to (U32_MAX + 1) * 4096. This does not
affect 4K blocksize f2fs as the natural limit for files are well below
that.
Fixes: d7e9a9037de2 ("f2fs: Support Block Size == Page Size")
Signed-off-by: Daniel Rosenberg <drosen@google.com>
---
fs/f2fs/super.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 033af907c3b1..5dfbc6b4c0ac 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -3364,6 +3364,14 @@ loff_t max_file_blocks(struct inode *inode)
leaf_count *= NIDS_PER_BLOCK;
result += leaf_count;
+ /*
+ * For compatibility with FSCRYPT_POLICY_FLAG_IV_INO_LBLK_{64,32} with
+ * a 4K crypto data unit, we must restrict the max filesize to what can
+ * fit within U32_MAX + 1 data units.
+ */
+
+ result = min(result, (((loff_t)U32_MAX + 1) * 4096) >> F2FS_BLKSIZE_BITS);
+
return result;
}
base-commit: d346fa09abff46988de9267b67b6900d9913d5a2
--
2.43.0.rc2.451.g8631bc7472-goog
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WARNING: multiple messages have this Message-ID (diff)
From: Daniel Rosenberg <drosen@google.com>
To: linux-f2fs-devel@lists.sourceforge.net
Cc: Jaegeuk Kim <jaegeuk@kernel.org>, Chao Yu <chao@kernel.org>,
linux-kernel@vger.kernel.org, kernel-team@android.com,
Daniel Rosenberg <drosen@google.com>
Subject: [PATCH v3] f2fs: Restrict max filesize for 16K f2fs
Date: Mon, 4 Dec 2023 18:38:01 -0800 [thread overview]
Message-ID: <20231205023801.3669458-1-drosen@google.com> (raw)
Blocks are tracked by u32, so the max permitted filesize is
(U32_MAX + 1) * BLOCK_SIZE. Additionally, in order to support crypto
data unit sizes of 4K with a 16K block with IV_INO_LBLK_{32,64}, we must
further restrict max filesize to (U32_MAX + 1) * 4096. This does not
affect 4K blocksize f2fs as the natural limit for files are well below
that.
Fixes: d7e9a9037de2 ("f2fs: Support Block Size == Page Size")
Signed-off-by: Daniel Rosenberg <drosen@google.com>
---
fs/f2fs/super.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 033af907c3b1..5dfbc6b4c0ac 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -3364,6 +3364,14 @@ loff_t max_file_blocks(struct inode *inode)
leaf_count *= NIDS_PER_BLOCK;
result += leaf_count;
+ /*
+ * For compatibility with FSCRYPT_POLICY_FLAG_IV_INO_LBLK_{64,32} with
+ * a 4K crypto data unit, we must restrict the max filesize to what can
+ * fit within U32_MAX + 1 data units.
+ */
+
+ result = min(result, (((loff_t)U32_MAX + 1) * 4096) >> F2FS_BLKSIZE_BITS);
+
return result;
}
base-commit: d346fa09abff46988de9267b67b6900d9913d5a2
--
2.43.0.rc2.451.g8631bc7472-goog
next reply other threads:[~2023-12-05 2:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-05 2:38 Daniel Rosenberg via Linux-f2fs-devel [this message]
2023-12-05 2:38 ` [PATCH v3] f2fs: Restrict max filesize for 16K f2fs Daniel Rosenberg
2023-12-14 20:50 ` [f2fs-dev] " patchwork-bot+f2fs
2023-12-14 20:50 ` patchwork-bot+f2fs
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