Date: Mon, 25 Feb 2002 23:35:10 +0900 From: Takanori Watanabe <takawata@shidahara1.planet.sci.kobe-u.ac.jp> To: hackers@freebsd.org Subject: unionfs and getcwd problem. Message-ID: <200202251435.XAA91094@shidahara1.planet.sci.kobe-u.ac.jp>
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Hi, I had trouble with unionfs when it calles getcwd(3) when I mount some directory on the directry in same file system,like mount -t union /usr/home/foo/bar /usr/src/sys/ . I investigate the problem by inserting debug print in getcwd.c. Then I found issuing __getcwd(2) in getcwd(3) failed, and climb up filesystem tree as the next way. But it failed when it reaches to mount point. It seems that st_dev and st_ino member returns the same number as the underlying filesystem so it failed to recognize mount point. So I tried the patch as follows taken from nullfs. Are there any problem with this patch? Takanori Watanabe <a href="http://www.planet.sci.kobe-u.ac.jp/~takawata/key.html">; Public Key</a> Key fingerprint = 2C 51 E2 78 2C E1 C5 2D 0F F1 20 A3 11 3A 62 2A --- union_vnops.c~ Tue Oct 2 00:01:37 2001 +++ union_vnops.c Mon Feb 25 22:44:51 2002 @@ -957,6 +957,8 @@ union_newsize(ap->a_vp, VNOVAL, vap->va_size); } + ap->a_vap->va_fsid = ap->a_vp->v_mount->mnt_stat.f_fsid.val[0]; + if ((vap != ap->a_vap) && (vap->va_type == VDIR)) ap->a_vap->va_nlink += vap->va_nlink; return (0); To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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