tarfs: Fix support for large filesHEADmain

* When fast-forwarding through a zstd frame, we incorrectly used the
  min() inline function instead of the MIN() macro.  The function
  truncates the result to unsigned int, resulting in a decompression
  error when trying to seek more than 4 GB into the frame.

* POSIX states that a size extended header record overrides the size
  field in the header if present, and that one must be included if the
  size of the file exceeds 8 GB (the size field maxes out at 64 GB).

* Reduce repetition in the exthdr parser by deduplicating the syntax
  error handler.

MFC after:	1 week
Sponsored by:	Klara, Inc.
Fixes:		69d94f4c7608 ("Add tarfs, a filesystem backed by tarballs.")
Reviewed by:	allanjude
Differential Revision:	https://reviews.freebsd.org/D53718

0 files changed, 0 insertions, 0 deletions