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.
View this message in rfc822 format
From: Pádraig Brady <P <at> draigBrady.com> To: Dave <dave <at> momentumweb.com>, 22199 <at> debbugs.gnu.org Subject: bug#22199: Bug in coreutils for Linux Mint?? Package coreutils_8.21-1ubuntu5.3_amd64 Date: Tue, 22 Dec 2015 01:39:11 +0000
On 21/12/15 22:13, Dave wrote: > > 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? Neither /proc/self/mounts or /proc/self/mountinfo mention /dev/sda1 ? That's weird. Note the older ubuntu df should be referencing /etc/mtab which these days is usually a link to /proc/self/mounts. The newer df will directly reference /proc/self/mountinfo. So it would be good to confirm that /etc/mtab is a symlink to /proc/self/mounts. Also it would be good to attach that file and /proc/self/mountinfo to avoid any ambiguity. thanks, Pádraig
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