When using mount version 2.12q-r1 / is not listed in /etc/mtab. So neighter the mount command shows it, nor df -ah does. Afer replacing mount-2.12q-r1 with 2. 12i it works fine. Reproducible: Always Steps to Reproduce: 1. emerge sys-apps/utils-linux-2.12q-r1 2. reboot 3. take a look at $(mount) output Actual Results: / is not listed in the output of the mount command Expected Results: / should be listet there Portage 2.0.52-r1 (default-linux/x86/2005.1, gcc-3.4.4, glibc-2.3.5-r1, 2.6.12- ck6 i686) ================================================================= System uname: 2.6.12-ck6 i686 Intel(R) Pentium(R) 4 CPU 3.20GHz Gentoo Base System version 1.12.0_pre8 dev-lang/python: 2.3.5, 2.4.1-r1 sys-apps/sandbox: 1.2.11 sys-devel/autoconf: 2.13, 2.59-r7 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6 sys-devel/binutils: 2.16.1 sys-devel/libtool: 1.5.20 virtual/os-headers: 2.6.11-r2 ACCEPT_KEYWORDS="x86 ~x86" AUTOCLEAN="yes" CBUILD="i686-pc-linux-gnu" CFLAGS="-march=prescott -O3 -pipe -fomit-frame-pointer -mfpmath=sse,387 -ffast- math -ftracer -maccumulate-outgoing-args -fforce-addr -falign-functions=4 - fprefetch-loop-arrays" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.4/env /usr/kde/3.4/ share/config /usr/kde/3.4/shutdown /usr/kde/3/share/config /usr/lib/X11/xkb / usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-march=prescott -O3 -pipe -fomit-frame-pointer -mfpmath=sse,387 - ffast-math -ftracer -maccumulate-outgoing-args -fforce-addr -falign-functions=4 -fprefetch-loop-arrays" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig distlocks sandbox sfperms strict" GENTOO_MIRRORS="http://mirrors.sec.informatik.tu-darmstadt.de/gentoo/" LANG="de_DE@euro" LINGUAS="de" MAKEOPTS="-j3" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" SYNC="rsync://rsync.de.gentoo.org/gentoo-portage" USE="x86 X alsa apm avi berkdb bitmap-fonts bzip2 cdr crypt cups divx4linux dvd dvdread eds emboss encode fam ffmpeg foomaticdb fortran gdbm gif gnome gpm gstreamer gtk gtk2 icc icq imlib java javascript jpeg kde libg++ libwww mad mikmod mmx mmx2 mmxext motif mp3 mpeg ncurses nls nptlonly ogg oggvorbis opengl oss pam pdflib perl png python qt quicktime readline samba sdl spell sse sse2 ssl tcpd tiff truetype truetype-fonts type1-fonts vorbis win32codecs xinerama xml2 xmms xv zlib linguas_de userland_GNU kernel_linux elibc_glibc" Unset: ASFLAGS, CTARGET, LC_ALL, LDFLAGS, PORTDIR_OVERLAY
it looks like mount/fstab.c:update_mtab() doesnt properly insert the absent entry into the double linked list when using remount
Borked patch, fixed in -r2.
i dont think so ... the borked patch you mention is not borked read the linked list code in fstab.c and you'll see that it is what is triggering this bug
err, nm, i was confusing -n with -f ... that first hunk is wrong as you changed however, the bug i mentioned still exists with the double linked list not being updated properly
Created attachment 68434 [details, diff] util-linux-2.12q-update_mtab-fixes.patch Ugh, update_mtab() is one buggy wart. This fixes a few issues with update_mtab(): - If it is a remount, and only mnt_opts needs updating, mc->m.mnt_opts is set to point to instead->mnt_opts, rather than allocating a new string, which would cause a double free if the caller actually freed the passed mnt_opts, as we free mc->m.mnt_opts before returning to the caller. - Mostly the same issue as above. If mtab does not contain the new entry, then absent->m is set to point to instead, which would have cause a double free if absent was inserted properly into the linked list, since we free all elements of absent before returning to the caller. - If mtab does not contain the new entry, then only mc0->prev is updated to point to absent, but not the old mc0->prev's nxt pointer. Because we then use the nxt pointers to write the new mtab, absent is not added to the new mtab. - If mtab is empty, absent->prev should be set to mc0, and not mc0->prev, as it will be NULL. I added it to util-linux-2.12q-r2, and did not rev bump, as you said in bug #105805 that you will do it after you checked the other patches. Also, it seems that 'mount -f -o remount' works as expected without that other patch we talked about: ----- lycan ~ # awk '$2 == "/" { print }' /etc/mtab lycan ~ # mount -f / lycan ~ # awk '$2 == "/" { print }' /etc/mtab /dev/mapper/nsw1p2 / ext3 rw,noatime 0 0 lycan ~ # rm -f /etc/mtab lycan ~ # awk '$2 == "/" { print }' /etc/mtab awk: cmd. line:1: fatal: cannot open file `/etc/mtab' for reading (No such file or directory) lycan ~ # mount -f -o remount / lycan ~ # awk '$2 == "/" { print }' /etc/mtab /dev/mapper/nsw1p2 / ext3 rw,noatime 0 0 lycan ~ #
all should be resolved with 2.12q-r3
