Messages in this thread | | | Date | Tue, 15 Apr 2014 19:39:24 +0200 | From | Emmanuel Colbus <> | Subject | Re: [RFC][5/11][MANUX] Kernel compatibility : major/minor numbers |
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Le 15/04/2014 17:02, Austin S Hemmelgarn a écrit : > On 2014-04-15 09:42, Emmanuel Colbus wrote: >> Now, back to the filesystem... >> >> In order to associate devices to their files, the Linux kernel uses >> their major and minor numbers. However, mine doesn't; instead, I've >> attributed myself a single group of values (major=0, minor=0, for both >> character-mode and block-mode special files), with the meaning (for the >> userspace) "you cannot identify the content of this file based on its >> major and minor numbers". >> >> As for my kernel, there is a syscall to associate such files with their >> proper peripherals (asper(2)), after which it internally identifies them >> using their inode and partition numbers; as for userspace, it has no >> choice but to use their names, as usual. >> >> Do you have any objection to my taking of these values? >> > > According to Documentation/devices.txt: > 0 Unnamed devices (e.g. non-device mounts) > 0 = reserved as null device number > > Based on this, I would say that you are probably better off using one of > the local use numbers (60-63 and 250-254 are reserved for local and > experimental use) >
I see... Well, I think I'm going to take 254/0 for this then.
Thank you!
Emmanuel -- 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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