Date: Fri, 17 Aug 2018 10:01:39 -0700 From: Conrad Meyer <cem@freebsd.org> To: Masachika ISHIZUKA <ish@amail.plala.or.jp> Cc: freebsd-fs <freebsd-fs@freebsd.org> Subject: Re: How to mount ISO-9660 multi-extents blu-ray disc Message-ID: <CAG6CVpUPCEETC48HSigtpFHddkajqgyfrEC9ByAqJdAm99XeSQ@mail.gmail.com> In-Reply-To: <20180817.172713.1462611697013497228.ish@amail.plala.or.jp> References: <20180817.172713.1462611697013497228.ish@amail.plala.or.jp>
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Thanks for the report. It looks like classic 32-bit truncation is happening somewhere on the file size: $ printf "%x\n" 5368709120 140000000 $ printf "%x\n" 1073741824 40000000 This is at least in part due to the inode i_size being a (32-bit) unsigned long. i_size is initialized by isonum_733(isodir->size) in cd9660_vget_internal(), which decodes a 32-bit little endian number. So i_size needs to be expanded, and there may be additional logic needed to enumerate size information for files larger than 4GB. This is a deficiency in cd9660 that I don't believe can be addressed with a mount time option, so if possible, please file a PR in bugzilla to track this. Thank you, Conrad On Fri, Aug 17, 2018 at 1:27 AM, Masachika ISHIZUKA <ish@amail.plala.or.jp> wrote: > Hi. > > I was written 5gb file on bru-ray disc by growisofs with linux. > I want to mount it with freebsd, but only last extent of file is > shown as follows. > > freebsd# mount -t cd9660 /dev/cd0 /cdrom > freebsd# ls -l /cdrom/test/ > total 1048576 > -rw-r--r-- 1 root wheel 1073741824 Aug 17 16:58 test5g > > On the other hand, linux can handle multi-extents disc as follows. > > ubuntu# mount /dev/sr0 /cdrom > ubuntu# ls -l /cdrom/test/ > total 5242880 > -r--r--r-- 1 nobody nogroup 5368709120 Aug 17 16:58 test5g > > How can I mount multi-extents disc with freebsd ? > _______________________________________________ > freebsd-fs@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org"
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