diff options
| author | Daniel Rosenberg <drosen@google.com> | 2023-12-04 18:38:01 -0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2023-12-08 12:31:08 -0800 |
| commit | a6a010f5def544af3efcfe21683905a712b60536 (patch) | |
| tree | c1ec8e80251a0c067db98329e3873a1269dc9beb /fs/f2fs | |
| parent | 1ccd91963bd48b8da4148c128a946c2312407243 (diff) | |
f2fs: Restrict max filesize for 16K f2fs
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>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/super.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 9a874b4d1501..206d03c82d96 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -3359,6 +3359,14 @@ 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; } |