Package: coreutils;
Reported by: Dave <dave <at> momentumweb.com>
Date: Fri, 18 Dec 2015 00:29:02 UTC
Severity: normal
Tags: notabug
Done: Assaf Gordon <assafgordon <at> gmail.com>
Bug is archived. No further changes may be made.
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From: Dave <dave <at> momentumweb.com> To: 22199 <at> debbugs.gnu.org Subject: bug#22199: Bug in coreutils for Linux Mint?? Package coreutils_8.21-1ubuntu5.3_amd64 Date: Mon, 21 Dec 2015 16:13:12 -0600
On 12/18/2015 4:28 AM, Pádraig Brady wrote: > On 18/12/15 00:23, Dave wrote: >> df's output shows this on a standard run(df with no flags): >> >> Filesystem 1K-blocks Used Available Use% Mounted on >> udev 1953632 4 1953628 1% /dev >> tmpfs 400436 1216 399220 1% /run >> /dev/sda1 957218452 302330152 606241340 34% / >> none 4 0 4 0% /sys/fs/cgroup >> none 5120 0 5120 0% /run/lock >> none 2002168 8 2002160 1% /run/shm >> none 102400 4 102396 1% /run/user >> /dev/sdb1 957218452 302510240 606061252 34% /mnt/bkup/device2 >> >> But when I mount an external USB disk that's on /dev/sdc1, df shows this >> output: >> >> Filesystem 1K-blocks Used Available Use% Mounted on >> udev 1953632 4 1953628 1% /dev >> tmpfs 400436 1272 399164 1% /run >> /dev/sdc1 957218452 302334136 606237356 34% / >> none 4 0 4 0% /sys/fs/cgroup >> none 5120 0 5120 0% /run/lock >> none 2002168 8 2002160 1% /run/shm >> none 102400 4 102396 1% /run/user >> /dev/sdb1 957218452 302498156 606073336 34% /mnt/bkup/device2 >> /dev/sdc1 957218452 302564064 606007428 34% /mnt/bkup/externaldevice >> >> The filesystem of "/" has mysteriously changed (in appearance) to >> /dev/sdc1?! All I did was mount the /dev/sdc1 device. In fact, >> /dev/sdc1 is ONLY mounted at /mnt/bkup/externaldevice, and the mounted >> filesystem on "/" is still /dev/sda1. I tested by writing a couple of >> files, plus mount shows the correct info: >> >> /dev/sda1 on / type ext4 (rw,errors=remount-ro) >> /dev/sdb1 on /mnt/bkup/device2 type ext4 (rw) >> >> If I unmount /mnt/bkup/externaldevice, df still shows /dev/sdc1 as the >> "/" filesystem for a small amount of time (10-20 seconds) and then it >> goes back to the correct filesystem of /dev/sda1. >> >> What is going on?? This only happened after upgrading to the package of >> coreutils mentioned in the subject, it was not doing this previously. >> Also, to note, the first two lines of the df output regarding udev and >> tmpfs did not appear until this version either. I did see in the >> changelog that df was updated to display some additional information, so >> perhaps it has to do with that?? > I see that ubuntu has backported _some_ patches from master. > Perhaps they were incomplete. Could you please try out this latest df binary. > > wget http://www.pixelbeat.org/cu/df > chmod a+x df > ./df > > (There is a df.sig file is the same dir for gpg verification > using the public key associated with this email address if desired) > > cheers, > Pádraig. > Pádraig, thanks for the response. The df you provided (v8.24.113-84fcb) also shows /dev/sdc1 in place of /dev/sda1 once the /dev/sdc1 device is mounted, the same as in the example in the correspondence above. Is that what you were expecting? I found a copy of the old df that was in use before the coreutils package upgrade, and it presents as version 8.21 just like the current one when running df --version. The package the original came from was coreutils_8.21-1ubuntu5.1_amd64 and the df executable is dated Jan 13, 2015. I just ran THAT df, and here's the output (with the /dev/sdc1 device mounted): Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda1 957218452 304082900 604488592 34% / none 4 0 4 0% /sys/fs/cgroup udev 1953632 4 1953628 1% /dev tmpfs 400436 1272 399164 1% /run none 5120 0 5120 0% /run/lock none 2002168 8 2002160 1% /run/shm none 102400 4 102396 1% /run/user /dev/sdb1 957218452 304106588 604464904 34% /mnt/bkup/device2 /dev/sdc1 957218452 300703220 607868272 34% /mnt/bkup/externaldevice So, 2 things of note: 1) I was clearly incorrect in saying in my original message that the udev and tmpfs lines weren't showing in the original df listing, because there they are, they were just in a different spot (ie, not at the top) as you can see above. Apologies for the misinformation on that. 2) Well, you can see that the old df is reporting the root filesystem as /dev/sda1 correctly. If I run your df, or the newer df, both incorrectly show "/dev/sdc1" for the root filesystem after /dev/sdc1 is mounted at /mnt/bkup/externaldevice. Also, here are the relevant lines from /proc/mounts and /proc/self/mountinfo you had requested: /proc/mounts: rootfs / rootfs rw 0 0 /dev/sdb1 /mnt/bkup/device2 ext4 rw,relatime,data=ordered 0 0 /dev/sdc1 /mnt/bkup/externaldevice ext4 rw,relatime,data=ordered 0 0 /proc/self/mountinfo: 22 1 8:1 / / rw,relatime - ext4 /dev/disk/by-uuid/ced6112c-e347-4ac4-a160-0b2f03c88602 rw,errors=remount-ro,data=ordered 23 22 8:17 / /mnt/bkup/device2 rw,relatime - ext4 /dev/sdb1 rw,data=ordered 33 22 8:33 / /mnt/bkup/externaldevice rw,relatime - ext4 /dev/sdc1 rw,data=ordered Also, it should be noted, upon looking further into the uuid for "/" referenced in /proc/self/mountinfo, I found that that reference is softlinked to "/dev/sdc1" and it stays that way even after the external device is unmounted. Hmm. So /proc/self/mountinfo seems wrong about "/" in this case, since it's not referencing /dev/sda in any way. And it's odd that the older df works, even despite that issue. Maybe I'm not clear on what all /proc/self/mountinfo is supposed to convey? And maybe this bug is originating somewhere else outside of df then? -Dave
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