Messages in this thread | | | Date | Tue, 25 Mar 2008 09:37:29 -0400 | From | Mark Lord <> | Subject | Re: What to do about the 2TB limit on HDIO_GETGEO ? |
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H. Peter Anvin wrote: > Mark Lord wrote: >> >> One candidate might seem to be the existing >> /sys/block/dev/partition/start >> which I expect is already 64-bit friendly. >> >> But this requires about 150 lines of somewhat complex C code to access, >> using only the dev_t (from stat(2) on a file) as a starting point, >> or less if one relies upon the udev device name matching the sysfs >> device name. >> >> Is it time now for HDIO_GETGEO64 to make an appearance? >> Similar to how the existing BLKGETSIZE64 is supplanting BLKGETSIZE ? >> > > Probably a better thing to have would be a way to look up block devices > in sysfs by device number. ..
Yeah, that would be just as good, really. Maybe even better.
Mark Lord wrote (later on): > Instead, software has to search everything inside /sys/block/ > looking for a "dev" file whose contents match, > rather than just trying to access something like this: > > /sys/block/8:1/start > or > /sys/block/majors/8/minors/1/start > > Or any one of a number of similar ways to arrange it. ..
Greg ?
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