Messages in this thread | | | Date | Wed, 23 Nov 2005 23:15:28 -0600 | From | Chris Adams <> | Subject | Re: Generation numbers in stat was Re: what is slashdot's answer to ZFS? |
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Once upon a time, Andi Kleen <ak@suse.de> said: > Chris Adams <cmadams@hiwaay.net> writes: > > [Tru64 UNIX] However, in the rare case when a user application has been > > deleting open files, and a file serial number is reused, a third structure > > member in <sys/stat.h>, the file generation number, is needed to uniquely > > identify a file. This member, st_gen, is used in addition to st_ino and > > st_dev. > > Sounds like a cool idea. Many fs already maintain this information > in the kernel. We still had some unused pad space in the struct stat > so it could be implemented without any compatibility issues > (e.g. in place of __pad0). On old kernels it would be always 0.
Searching around some, I see that OS X has st_gen, but the man page I found says it is only available for super-user. It also appears that AIX and at least some of the BSDs have it (which would make sense I guess as Tru64, OS X, and IIRC AIX are all BSD derived).
Also, I ses someone pitched it to linux-kernel several years ago but it didn't appear to go anywhere. Maybe time to rethink that? -- Chris Adams <cmadams@hiwaay.net> Systems and Network Administrator - HiWAAY Internet Services I don't speak for anybody but myself - that's enough trouble. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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