Bug 1024730
| Summary: | While mounting two different file system (ext3, ext4 ) df tool shows only one mounted file system | ||||||||
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| Product: | [Fedora] Fedora | Reporter: | IBM Bug Proxy <bugproxy> | ||||||
| Component: | coreutils | Assignee: | Ondrej Vasik <ovasik> | ||||||
| Status: | CLOSED UPSTREAM | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||||
| Severity: | medium | Docs Contact: | |||||||
| Priority: | unspecified | ||||||||
| Version: | 20 | CC: | admiller, bugproxy, extras-orphan, hannsj_uhl, jkachuck, jonathan, kdudka, kzak, mluscon, ooprala, ovasik, pbrady, p, rvokal, twaugh, wgomerin | ||||||
| Target Milestone: | --- | ||||||||
| Target Release: | --- | ||||||||
| Hardware: | s390x | ||||||||
| OS: | All | ||||||||
| Whiteboard: | |||||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||||
| Doc Text: | Story Points: | --- | |||||||
| Clone Of: | Environment: | ||||||||
| Last Closed: | 2014-06-19 21:20:20 UTC | Type: | --- | ||||||
| Regression: | --- | Mount Type: | --- | ||||||
| Documentation: | --- | CRM: | |||||||
| Verified Versions: | Category: | --- | |||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||
| Embargoed: | |||||||||
| Attachments: |
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Created attachment 817390 [details]
df patch
Created attachment 817391 [details]
sosreport
------- Comment From thorsten.diehl.com 2014-02-27 17:23 EDT------- I can not reproduce this on RHEL7.0 snap8 with various filesystems, and also with a change and manually mounted filesystem it was ok, see here: [root@p2315003 ~]# df -hT /dev/dasda1 ext4 3.8G 715M 2.9G 20% / devtmpfs devtmpfs 994M 0 994M 0% /dev tmpfs tmpfs 999M 0 999M 0% /dev/shm tmpfs tmpfs 999M 8.3M 991M 1% /run tmpfs tmpfs 999M 0 999M 0% /sys/fs/cgroup /dev/dasdb2 ext4 5.7G 12M 5.4G 1% /home /dev/dasda2 ext3 1.9G 26M 1.8G 2% /var /dev/dasdb1 xfs 469M 71M 398M 16% /boot /dev/dasda3 xfs 569M 31M 539M 6% /srv [root@p2315003 ~]# cat /etc/fstab |grep dasd [root@p2315003 ~]# cat /etc/fstab # # /etc/fstab # Created by anaconda on Thu Feb 27 17:12:39 2014 # # Accessible filesystems, by reference, are maintained under '/dev/disk' # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info # /dev/disk/by-path/ccw-0.0.5c06-part1 / ext4 defaults 1 1 /dev/disk/by-path/ccw-0.0.5c07-part1 /boot xfs defaults 1 2 /dev/disk/by-path/ccw-0.0.5c07-part2 /home ext4 defaults 1 2 /dev/disk/by-path/ccw-0.0.5c06-part3 /srv xfs defaults 1 2 /dev/disk/by-path/ccw-0.0.5c06-part2 /var ext3 defaults 1 2 /dev/disk/by-path/ccw-0.0.5c07-part3 swap swap defaults 0 0 [root@p2315003 ~]# umount /srv [root@p2315003 ~]# mkfs.ext4 /dev/disk/by-path/ccw-0.0.5c06-part3 mke2fs 1.42.9 (28-Dec-2013) 38400 inodes, 153600 blocks 7680 blocks (5.00%) reserved for the super user Maximum filesystem blocks=159383552 5 block groups 7680 inodes per group 32768, 98304 Creating journal (4096 blocks): done [root@p2315003 ~]# mount -t ext4 /dev/disk/by-path/ccw-0.0.5c06-part3 /srv [root@p2315003 ~]# df -hT /dev/dasda1 ext4 3.8G 715M 2.9G 20% / devtmpfs devtmpfs 994M 0 994M 0% /dev tmpfs tmpfs 999M 0 999M 0% /dev/shm tmpfs tmpfs 999M 8.3M 991M 1% /run tmpfs tmpfs 999M 0 999M 0% /sys/fs/cgroup /dev/dasdb2 ext4 5.7G 12M 5.4G 1% /home /dev/dasda2 ext3 1.9G 26M 1.8G 2% /var /dev/dasdb1 xfs 469M 71M 398M 16% /boot /dev/dasda3 ext4 575M 468K 533M 1% /srv [root@p2315003 ~]# Actually, what you see is caused by the change of /etc/mtab to symlink to /proc/mounts. df needs to do the deduplication, otherwise you can sometimes see dozens of duplicates because of bindmounts and various other "unwanted" items. Unfortunately, deduplication with the shortest mount approach has some disadvantages - but every approach we tried is not perfect. For showing all mounted filesystems you can use df -a (or --all). Does that answer your question/concern? I tend to close it either CANTFIX or NOTABUG - as the behaviour is the result of the systemwide change and there is no good way how to fix it (other than some nasty workarounds like behaving differently for things like fuse fs). As no further comment is provided, I'm closing this CANTFIX ... we know about the df deduplication deficiencies and these are already tracked by various bugzillas (and were discussed upstream). Unfortunately, there is no clear solution atm. - and keeping this one opened doesn't make sense. I think there were issues here. though there is no point showing old mounts that can't be accessed. The soon to be released coreutils 8.23 will show the last (i.e. only accessible) details for a mount point, as per these commits: http://git.sv.gnu.org/gitweb/?p=coreutils.git;a=commit;h=25a2c948 http://git.sv.gnu.org/gitweb/?p=coreutils.git;a=commit;h=4f8d74eb ------- Comment From hannsj_uhl.com 2017-07-13 07:29 EDT------- . |
== Comment: #2 - Onkar N. Mahajan <onmahaja.com> - 2013-10-16 01:17:48 == === Problem Statement === (1) You mounted two partititions - part -> fs -> mnt point -> avl disk -> used -> avl % ------------------------------------------------------------------------------ mpath1 -> fuse -> /tmp/test/ -> 1.0 T -> 1.0 T -> 100% mpath2 -> ext3 -> /mnt -> 1.8 T -> 21G -> 2% (2) You unmount the /mnt (formatted with ext3) (3) mount mpath2 (you unmounted in step 2) on /tmp/test/ (4) Now , you do df and expect this - Filesystem Type Size Used Avail Use% Mounted on /dev/mapper/mpatha2 ext3 1.8T 21G 1.7T 2% /tmp/test But you see this - Filesystem Type Size Used Avail Use% Mounted on /dev/mapper/mpatha1 fuse 1.8T 21G 1.7T 2% /tmp/test == Comment: #4 - NITIN GARG <nitgarg8.com> - 2013-10-16 01:24:26 == (In reply to comment #2) > === Problem Statement === > > (1) You mounted two partititions - > part -> fs -> mnt point -> avl disk -> used -> avl % > ----------------------------------------------------------------------------- > - > mpath1 -> fuse -> /tmp/test/ -> 1.0 T -> 1.0 T -> 100% > mpath2 -> ext3 -> /mnt -> 1.8 T -> 21G -> 2% > > (2) You unmount the /mnt (formatted with ext3) > (3) mount mpath2 (you unmounted in step 2) on /tmp/test/ > (4) Now , you do df and expect this - > > Filesystem Type Size Used Avail Use% Mounted on > /dev/mapper/mpatha2 ext3 1.8T 21G 1.7T 2% /tmp/test > > But you see this - > Filesystem Type Size Used Avail Use% Mounted on > /dev/mapper/mpatha1 fuse 1.8T 21G 1.7T 2% /tmp/test yes Onkar you are right I see the old mounted partition only. like as you explained mpatha1 in this case. == Comment: #5 - Onkar N. Mahajan <onmahaja.com> - 2013-10-16 01:50:25 == Nitin, I am examining the issue , until then can you please follow the same procedure for two partitions of different sizes but the and use some other filesystem in place of 'fuse'. What are the results in this case ? Regards, Onkar == Comment: #6 - NITIN GARG <nitgarg8.com> - 2013-10-16 01:53:30 == (In reply to comment #5) > Nitin, I am examining the issue , until then can you please follow the same > procedure for two partitions of different sizes but the and use some other > filesystem in place of 'fuse'. What are the results in this case ? > > Regards, > Onkar Onkar, As I have stated in my comments earlier : Same have been tested on RHEL7 with DASD : [root@r3513004 ~]# mke2fs -j /dev/dasdc1 mke2fs 1.42.6 (21-Sep-2012) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 451584 inodes, 1803036 blocks 90151 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=1849688064 56 block groups 32768 blocks per group, 32768 fragments per group 8064 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632 Allocating group tables: done Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done [root@r3513004 ~]# mke2fs -t ext4 /dev/dasdd1 mke2fs 1.42.6 (21-Sep-2012) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 451584 inodes, 1803036 blocks 90151 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=1849688064 56 block groups 32768 blocks per group, 32768 fragments per group 8064 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632 Allocating group tables: done Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done [root@r3513004 ~]# mount /dev/dasdc1 /mnt [root@r3513004 ~]# df -hT Filesystem Type Size Used Avail Use% Mounted on devtmpfs devtmpfs 427M 0 427M 0% /dev tmpfs tmpfs 433M 0 433M 0% /dev/shm tmpfs tmpfs 433M 1.8M 431M 1% /run tmpfs tmpfs 433M 0 433M 0% /sys/fs/cgroup /dev/dasda1 ext3 6.8G 809M 5.7G 13% / /dev/dasdc1 ext3 6.8G 144M 6.3G 3% /mnt [root@r3513004 ~]# mount /dev/dasdd1 /mnt [root@r3513004 ~]# df -hT Filesystem Type Size Used Avail Use% Mounted on devtmpfs devtmpfs 427M 0 427M 0% /dev tmpfs tmpfs 433M 0 433M 0% /dev/shm tmpfs tmpfs 433M 1.8M 431M 1% /run tmpfs tmpfs 433M 0 433M 0% /sys/fs/cgroup /dev/dasda1 ext3 6.8G 809M 5.7G 13% / /dev/dasdc1 ext3 6.8G 144M 6.3G 3% /mnt Though the size here is same but it doesn't matter. You can see that though I mounted dasdd1 but it shows me same pattern dasdc1. Thanks Nitin == Comment: #7 - Onkar N. Mahajan <onmahaja.com> - 2013-10-16 04:01:50 == IMO, when you stack mount ext3 fs on top of fusefs , and do df , you must see both the mount points something like this - /dev/mapper/mpatha2 ext3 1.8T 21G 1.7T 2% /tmp/test /dev/mapper/mpatha1 fuse 1.0T 1.0T 0 100% /tmp/test Examined the coreutils-8.15 package (latest available package for fc17). Observations are following - (1) df makes a list of mounted filesystems. (2) for each mountpoint - it stat's the mount point for the device id (stat.st_dev) and returns the first entry found with the given mountpoint and device ID. Doesn't see all the device IDs at all. Whereas , in fact it must list all the mounted partitions. I propose a patch here , this patch essentially does the following - looks up the device list for devices with a given mount point. Prepares a list of devices mounted on a given mount point and then appends this list at the end of a global device list of mounted devices. I this way , all the mounted devices will be listed , this holds true even for unionfs. Regards, Onkar == Comment: #10 - NITIN GARG <nitgarg8.com> - 2013-10-16 04:37:32 == == Comment: #16 - Onkar N. Mahajan <onmahaja.com> - 2013-10-25 00:21:00 == Issue is also observed on fedora 19. # mke2fs -t ext3 /dev/dasdb2 mke2fs 1.42.7 (21-Jan-2013) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 386304 inodes, 1544196 blocks 77209 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=1585446912 48 block groups 32768 blocks per group, 32768 fragments per group 8048 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736 Allocating group tables: done Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done #mount /dev/dasdb2 /mnt # df -hT Filesystem Type Size Used Avail Use% Mounted on /dev/dasda1 ext4 6.7G 4.4G 2.0G 70% / devtmpfs devtmpfs 491M 0 491M 0% /dev tmpfs tmpfs 496M 0 496M 0% /dev/shm tmpfs tmpfs 496M 220K 495M 1% /run tmpfs tmpfs 496M 0 496M 0% /sys/fs/cgroup tmpfs tmpfs 496M 4.0K 496M 1% /tmp /dev/dasdb1 ext4 469M 68M 376M 16% /boot /dev/dasdb2 ext3 5.7G 12M 5.4G 1% /mnt # mke2fs -t ext4 /dev/dasdc1 mke2fs 1.42.7 (21-Jan-2013) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 451584 inodes, 1803036 blocks 90151 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=1849688064 56 block groups 32768 blocks per group, 32768 fragments per group 8064 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632 Allocating group tables: done Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done # mount /dev/dasdc1 /mnt # df -hT Filesystem Type Size Used Avail Use% Mounted on /dev/dasda1 ext4 6.7G 4.4G 2.0G 70% / devtmpfs devtmpfs 491M 0 491M 0% /dev tmpfs tmpfs 496M 0 496M 0% /dev/shm tmpfs tmpfs 496M 224K 495M 1% /run tmpfs tmpfs 496M 0 496M 0% /sys/fs/cgroup tmpfs tmpfs 496M 4.0K 496M 1% /tmp /dev/dasdb1 ext4 469M 68M 376M 16% /boot /dev/dasdb2 ext3 6.7G 16M 6.3G 1% /mnt I see only /dev/dasdb2 though I mount /dev/dasdc1 of ext4 type. == Comment: #18 - Onkar N. Mahajan <onmahaja.com> - 2013-10-30 06:08:04 == looking at the source code , looks like this must be reproduced on f20 as well ..