Date: Sat, 22 Dec 2001 08:23:50 +1030 From: Richard Sharpe <sharpe@ns.aus.com> To: FreeBSD-hackers@freebsd.org Subject: Adding si_fd to struct __siginfo ... Message-ID: <3C23AF6E.90202@ns.aus.com>
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Hi, One of my tasks is to add oplock support to FreeBSD so that we (Panasas) can allow correct caching of files by Windows clients in the presence of NFS clients using the same files. We have a preliminary implementation, based on the Linux implementation, but it is a gross hack because there is no way for the kernel, when it delivers a signal, to indicate the fd that caused delivery of the signal. Linux and Solaris have an fd field in struct siginfo_t which allows the kernel to indicate, for signals relating to files, to indicate which fd the signal relates to. I notice that in FreeBSD struct siginfo_t seems to have int __spare__[7]; and would like to use one of those spare fields as si_fd. While I can do that in our code base, if I want to contribute the OpLock code it would be useful if the FreeBSD community finds this change agreeable. Are there any counter suggestions or any big objections? -- Richard Sharpe, rsharpe@ns.aus.com, LPIC-1 www.samba.org, www.ethereal.com, SAMS Teach Yourself Samba in 24 Hours, Special Edition, Using Samba To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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