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Zhang Yi 9ffa07c699 ext2: correct max file size computing 
[ Upstream commit 50b3a818991074177a56c87124c7a7bdf5fa4f67 ]

We need to calculate the max file size accurately if the total blocks
that can address by block tree exceed the upper_limit. But this check is
not correct now, it only compute the total data blocks but missing
metadata blocks are needed. So in the case of "data blocks < upper_limit
&& total blocks > upper_limit", we will get wrong result. Fortunately,
this case could not happen in reality, but it's confused and better to
correct the computing.

  bits   data blocks   metadatablocks   upper_limit
  10        16843020            66051    2147483647
  11       134480396           263171    1073741823
  12      1074791436          1050627     536870911 (*)
  13      8594130956          4198403     268435455 (*)
  14     68736258060         16785411     134217727 (*)
  15    549822930956         67125251      67108863 (*)
  16   4398314962956        268468227      33554431 (*)

  [*] Need to calculate in depth.

Fixes: 1c2d14212b ("ext2: Fix underflow in ext2_max_size()")
Link: https://lore.kernel.org/r/20220212050532.179055-1-yi.zhang@huawei.com
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2022-04-08 14:40:18 +02:00
..
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile
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acl.c
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acl.h
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balloc.c ext2: fix sleeping in atomic bugs on error 2021-10-09 14:40:56 +02:00
dir.c ext2: ext2_find_entry() return -ENOENT if no entry found 2020-07-09 08:14:00 +02:00
ext2.h ext2: ext2.h: fix duplicated word + typos 2020-07-27 10:58:06 +02:00
file.c ext2: don't update mtime on COW faults 2020-09-05 10:00:05 -07:00
ialloc.c ext2: fix missing percpu_counter_inc 2020-07-09 08:14:01 +02:00
inode.c ext2: remove duplicate include 2020-08-28 12:28:31 +02:00
ioctl.c ext2: return error when fail to allocating memory in ioctl 2019-10-24 09:24:40 +02:00
namei.c ext2: ext2_find_entry() return -ENOENT if no entry found 2020-07-09 08:14:00 +02:00
super.c ext2: correct max file size computing 2022-04-08 14:40:18 +02:00
symlink.c ext2: code cleanup by removing ifdef macro surrounding 2020-05-22 15:11:00 +02:00
xattr.c ext2: initialize quota info in ext2_xattr_set() 2020-07-09 08:14:01 +02:00
xattr.h ext2: code cleanup by removing ifdef macro surrounding 2020-05-22 15:11:00 +02:00
xattr_security.c
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xattr_trusted.c
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xattr_user.c
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