Date: Wed, 18 Aug 2010 12:48:53 +0200 From: Ed Schouten <ed@80386.nl> To: Daichi GOTO <daichi@freebsd.org> Cc: freebsd-fs@freebsd.org, freebsd-current@freebsd.org Subject: Mounting cd9660 multiple times gives EBUSY [Was: unionfs a little improvement] Message-ID: <20100818104853.GB2978@hoeg.nl> In-Reply-To: <4C6B9F51.1060009@freebsd.org> References: <4C6B9F51.1060009@freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
[-- Attachment #1 --] Hi Daichi, I think Keith Packard of Xorg once wrote a commit message along the lines of "5000 lines of code removed, feature added" This seems to be similar, albeit on a smaller scale. ;-) Apart from this issue with unionfs, I am also experiencing another issue, where for some reason I cannot perform a second mount of the CD right after booting the system. Basically, my WIP FreeBSD boot CD does the following (but written in C): mount -t cd9660 /dev/iso9660/freebsd /mnt mount -t tmpfs none /tmp mount -t unionfs /tmp /mnt mount -t devfs none /mnt/dev chroot /mnt /sbin/init The first step fails with EBUSY. I use the following hack to get it working, but I don't think it's the proper way to solve it: %%% Index: sys/geom/geom_vfs.c =================================================================== --- sys/geom/geom_vfs.c (revision 211093) +++ sys/geom/geom_vfs.c (working copy) @@ -162,8 +162,10 @@ *cpp = NULL; bo = &vp->v_bufobj; +#if 0 if (bo->bo_private != vp) return (EBUSY); +#endif pp = g_dev_getprovider(vp->v_rdev); if (pp == NULL) %%% I am really not that familiar with GEOM/VFS to understand the impact of this change. What does it actually mean if bo->bo_private != vp? -- Ed Schouten <ed@80386.nl> WWW: http://80386.nl/ [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (FreeBSD) iEYEARECAAYFAkxrupUACgkQ52SDGA2eCwVOWgCfRlwSVs8Fs3iGD2ekr/cwQmMB Y18An1UvOsrA+Xsys2nbvClJh8SoayaR =nCoj -----END PGP SIGNATURE-----
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20100818104853.GB2978>