Skip site navigation (1)Skip section navigation (2)
Date:      Tue, 04 Sep 2001 10:36:37 +0200
From:      Poul-Henning Kamp <phk@freebsd.org>
To:        current@freebsd.org, hackers@freebsd.org
Subject:   Junior Kernel Hacker task:  improve vnode->v_tag
Message-ID:  <2231.999592597@critter>

next in thread | raw e-mail | index | archive | help

Assignment:

The v_tag element in struct vnode is a debugging aid, but unfortunately
it is implemented in a way which means that adding a filesystem means
modifying the definition in <sys/vnode.h>.

Convert the v_tag to an "const char *" and have the filesystems put
their name in there instead.

The v_tag has been abused a few places, easily recognizable by the fact
that the kernel should never inspect the value of v_tag.
These places should be easily changeable to use the new representation.
Please mark them with a big fat "/*XXX: ABUSE OF v_tag */" comment.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message




Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?2231.999592597>