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Message-Id: <1231652146.4235.6.camel@perihelion.bos.jonmasters.org> Date: Sun, 11 Jan 2009 00:35:46 -0500 From: Jon Masters <jonathan@...masters.org> To: joseluismarchetti@...oo.com.br Cc: linux-kernel@...r.kernel.org Subject: Re: How to access a regular file from within a module ? On Sat, 2009-01-10 at 19:44 -0800, Jose Luis Marchetti wrote: > I would like to open/read/write/close a regular file from my device > driver. No, you probably wouldn't :) Generally, this is recommended against because there are many better ways to do it: * Create an interface and have userspace set the parameter (ethtool, ifconfig - the latter can already set MAC addresses) * Create entries in sysfs and have uevents cause various activities, including having the response being some file gets loaded (firmware). Since it looks like you just want to set the MAC address, I suggest looking at how this is already done, then rely upon users using ifconfig correctly to set the desired address. There should be no reason to have a kernel-side network driver reading from a file. [NOTE: If you're doing embedded development and you don't have an EEPROM on your board, and you're asking this because someone told you to find the cheapest and nastiest solution in software, then look at passing in the desired MAC via the firmware, as many embedded boards already do. ] Jon. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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