localmount does not take into account a btrfs subvol when attempting to mount at boot, saying that a partition is already mounted or the target directory is busy. Reproducible: Always Steps to Reproduce: 1. format disk to btrfs 2. mount disk and create two subvols, gentoo and home 3. btrfs su set-default (id of gentoo subvol) / 4. umount, remount disk, mkdir home, mount the home subvol 5. install gentoo into gentoo subvol 6. put these lines in /etc/fstab: /dev/sdb / btrfs noatime 0 0 /dev/sdb /home btrfs defaults,noatime,subvol=home 0 0 7. boot into new gentoo setup. Actual Results: On booting into the new gentoo setup, localmount will not mount /home, saying: mount: /dev/sdb is already mounted or /home busy /dev/sdb is already mounted on / But mounting /home manually with 'mount /home' after booting works fine. Expected Results: Expecting localmount to mount /home without complaining. btrfs su li / : ID 257 gen 1578 top level 5 path home ID 258 gen 1625 top level 5 path gentoo ID 267 gen 1165 top level 5 path snapshots/GentoobareSystem21022014 fstab: /dev/sdb / btrfs noatime 0 0 /dev/sdb /home btrfs defaults,noatime,subvol=home 0 0 mounts after unsucessful boot: rootfs on / type rootfs (rw) /dev/sdb on / type btrfs (rw,noatime,noacl,space_cache) proc on /proc type proc (rw,nosuid,nodev,noexec,relatime) tmpfs on /run type tmpfs (rw,nosuid,nodev,relatime,size=610456k,mode=755) sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime) udev on /dev type devtmpfs (rw,nosuid,relatime,size=10240k,nr_inodes=762677,mode=755) devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620) shm on /dev/shm type tmpfs (rw,nosuid,nodev,noexec,relatime) shm on /tmp type tmpfs (rw,nosuid,nodev,noexec,relatime) mounts after mounting /home manually, same as above except with: /dev/sdb on /home type btrfs (rw,noatime,subvol=home) Portage 2.2.7 (default/linux/amd64/13.0/no-multilib, gcc-4.7.3, glibc-2.17, 3.13.3-gentoo x86_64) ================================================================= System uname: Linux-3.13.3-gentoo-x86_64-Intel-R-_Core-TM-2_Quad_CPU_Q9505_@_2.83GHz-with-gentoo-2.2 KiB Mem: 6104536 total, 5990668 free KiB Swap: 0 total, 0 free Timestamp of tree: Tue, 25 Feb 2014 02:00:01 +0000 ld GNU ld (GNU Binutils) 2.23.2 app-shells/bash: 4.2_p45 dev-lang/python: 2.7.5-r3, 3.3.3 dev-util/cmake: 2.8.11.2 dev-util/pkgconfig: 0.28 sys-apps/baselayout: 2.2 sys-apps/openrc: 0.12.4 sys-apps/sandbox: 2.6-r1 sys-devel/autoconf: 2.13, 2.69 sys-devel/automake: 1.13.4 sys-devel/binutils: 2.23.2 sys-devel/gcc: 4.7.3-r1 sys-devel/gcc-config: 1.7.3 sys-devel/libtool: 2.4.2 sys-devel/make: 3.82-r4 sys-kernel/linux-headers: 3.9 (virtual/os-headers) sys-libs/glibc: 2.17 Repositories: gentoo ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="*" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O3 -pipe -march=core2 -fomit-frame-pointer" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-O3 -pipe -march=core2 -fomit-frame-pointer" DISTDIR="/usr/portage/distfiles" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://distfiles.gentoo.org" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j9" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="" USE="X acpi alsa amd64 apng ass bzip2 cli consolekit corefonts cpudetection cups dbus dri exif gdbm joystick jpeg minimal mmx mmxext modules nonfsv4 nptl opengl openmp pdf png policykit readline session smp sse sse2 sse3 ssl ssse3 svg thunar tiff truetype udev vaapi win64 x264 zlib" ABI_X86="64" ALSA_CARDS="hda-intel" ELIBC="glibc" INPUT_DEVICES="evdev" KERNEL="linux" LINGUAS="en" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_3" QEMU_SOFTMMU_TARGETS="x86_64 i386" QEMU_USER_TARGETS="x86_64 i386" RUBY_TARGETS="ruby19 ruby18" SANE_BACKENDS="epson2 net" USERLAND="GNU" VIDEO_CARDS="radeon modesetting" Unset: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, SYNC, USE_PYTHON
Solution presented here does not solve. http://comments.gmane.org/gmane.comp.file-systems.btrfs/17517
@base-system: This looks to me more like an issue with util-linux than OpenRc. Can you please advise me on this? Is there something I can do within OpenRc, or is it an issue with mount?
From reading the source (mount.c in util-linux-2.22.2), I can confirm it seems there's an EBUSY error in mount(8) that seems to be triggered by mount(2). I added a line to mount.c: warnx(_("%s is already mounted or %s busy"), src, tgt); + warnx(_("mount options: %s"),mnt_context_get_options(cxt)); and this does show that the subvol=(etc) is being passed along.
This was originally assigned to OpenRC as an issue in localmount. However, as shown in the bug, it was confirmed to be an issue with mount. A newer version of util-linux is being stabilized, so you might want to check and see if this is still an issue. Thanks, William
