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Author SHA1 Message Date
Pete Batard
67d324f82b
[extfs] fix inodes not being initialized above 4 GB
* So, as it happens, when assigning the product of two 32-bit variables into a 64-bit one,
  compilers default to being *DUMB* and, against all reasonable expectations, do not perform
  that multiplication as a 64-bit operation (even when the code is compiled as x64). Wow,
  that's really great decision making by compiler designers if I ever saw some... Whoever
  decided that C developers would much rather want truncation and 32-bit overflows, instead
  of the expected *LOGICAL* behaviour of conducting arithmetic operations as 64-bit when the
  result will be assigned to a 64-bit variable, need to be condemned to a lifetime of trying
  to help elderly folks trying to conduct simple computing tasks as a punishment...
  Anyhoo, nt_write_blk()'s offset.QuadPart = block * channel->block_size + nt_data->offset
  was overflowing 32-bit as soon as block * channel->block_size went over the 4 GB mark,
  with the disastrous results one can expect. Considering that this is code we practically
  lifted verbatim from e2fsprogs, I guess e2fsprogs' NT I/O manager was never properly
  tested with anything larger than a 4 GB. Awesome!
* We fix the above by doing what unix_io.c does and setting the 32-bit read/write_blk()
  calls to be wrappers around their 64-bit counterpart (since, once you deal with a 64-bit
  block variable, the computation is conducted as 64-bit).
* Also remove a bunch of stuff we don't need from config.h
* Closes #1396
2020-02-12 16:27:32 +00:00
Pete Batard
ccf0f1bf3c
[ext2fs] add journal support for ext3 formatting
* Also clean up code, handle errors and fix issues
2019-04-15 17:04:39 +01:00
Pete Batard
cec443ef61
[ext2fs] update to latest e2fsprogs
* e2fsprogs commit [cecc2bc78b39ddcd34a819a4d7e7cd30897958cb]
* Also add LGPLv2 license text
2019-04-13 14:52:29 +01:00
Pete Batard
cda716c1ff
[ext2fs] initial ext2fs support 2019-04-12 21:32:40 +01:00