Date: Wed, 15 Dec 2004 12:53:27 +0200 From: Ruslan Ermilov <ru@FreeBSD.org> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: current@FreeBSD.org Subject: Re: Background fsck is broken Message-ID: <20041215105326.GO25967@ip.net.ua> In-Reply-To: <43574.1103107578@critter.freebsd.dk> References: <20041215095901.GK25967@ip.net.ua> <43574.1103107578@critter.freebsd.dk>
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--FilwpOHBrTVNlmJ3 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Dec 15, 2004 at 11:46:18AM +0100, Poul-Henning Kamp wrote: > In message <20041215095901.GK25967@ip.net.ua>, Ruslan Ermilov writes: > > > >--KjSGHOmKKB2VUiQn > >Content-Type: text/plain; charset=3Dus-ascii > >Content-Disposition: inline > >Content-Transfer-Encoding: quoted-printable > > > >Hi, > > > >Here's another fsck(8) buglet. While booting single-user, / is > >mounted read-only, and "fsck -p /" succeeds as expected. While > >remounting / read-only (e.g., after shutting down from multi-user > >to single-user), it doesn't: >=20 > This is working as designed. >=20 > The way it works is that when you boot, the root filesystem opens > the device (r=3D1, w=3D0, e=3D0) thereby permitting fsck to open the > device for write. >=20 > When the root filesystem is upgraded to RW, the open is opgraded > to (r=3D1,w=3D1,e=3D1) and writing via /dev/mumble is no longer permitted. >=20 > Architecturally the way we fsck the root filesystem is highly bogus > and it would be much cleaner if mounted filesystems _always_ were > fsck'ed through a snapshot, but there are a unknown code to be written > to allow that to happen for the case where "unexpected softupdates > inconsistencies" are found. >=20 Are you saying it's not possible to downgrade the open to (r=3D1, w=3D0, e=3D0) when a file system is downgraded from R/W to R/O? Cheers, --=20 Ruslan Ermilov ru@FreeBSD.org FreeBSD committer --FilwpOHBrTVNlmJ3 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (FreeBSD) iD8DBQFBwBemqRfpzJluFF4RAvqOAJ4vltnfZ8ax4RZT+j/pxz9mVmS78ACggnem G9dJXnGupt88opYBC7M+y6k= =qI34 -----END PGP SIGNATURE----- --FilwpOHBrTVNlmJ3--
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