Bug 72791

Summary: btrfs-progs: btrfs-image from btrfs-tools 3.12 does not abort when run on a mounted filesystem
Product: File System Reporter: Marc MERLIN (marc)
Component: btrfsAssignee: Josef Bacik (josef)
Status: NEW ---    
Severity: normal CC: dsterba, marc, szg00000
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 3.14 Subsystem:
Regression: No Bisected commit-id:

Description Marc MERLIN 2014-03-23 19:02:38 UTC 
I didn't know it couldn't be run on a mounted filesystem and it didn't abort as it should have. Instead it gave random errors and SEGV'ed in the end
   
legolas:/mnt/btrfs_pool2# btrfs-image -c 9 -t 6 /dev/mapper/disk2 /tmp/pool2.image
parent transid verify failed on 295965446144 wanted 51493 found 51495
parent transid verify failed on 295965446144 wanted 51493 found 51495
parent transid verify failed on 295965446144 wanted 51493 found 51495
parent transid verify failed on 295965446144 wanted 51493 found 51495
Ignoring transid failure
leaf parent key incorrect 295965446144
parent transid verify failed on 106205184 wanted 51468 found 51528
parent transid verify failed on 106205184 wanted 51468 found 51528
parent transid verify failed on 106205184 wanted 51468 found 51528
parent transid verify failed on 106205184 wanted 51468 found 51528
Ignoring transid failure
parent transid verify failed on 267162120192 wanted 51469 found 51528
parent transid verify failed on 267162120192 wanted 51469 found 51528
parent transid verify failed on 267162120192 wanted 51469 found 51528
parent transid verify failed on 267162120192 wanted 51469 found 51528
Ignoring transid failure
parent transid verify failed on 107315200 wanted 51468 found 51528
parent transid verify failed on 107315200 wanted 51468 found 51528
parent transid verify failed on 107315200 wanted 51468 found 51528
parent transid verify failed on 107315200 wanted 51468 found 51528
Ignoring transid failure
parent transid verify failed on 108081152 wanted 51468 found 51528
parent transid verify failed on 108081152 wanted 51468 found 51528
parent transid verify failed on 108081152 wanted 51468 found 51528
parent transid verify failed on 108081152 wanted 51468 found 51528
Ignoring transid failure
parent transid verify failed on 267162124288 wanted 51469 found 51528
parent transid verify failed on 267162124288 wanted 51469 found 51528
parent transid verify failed on 267162124288 wanted 51469 found 51528
parent transid verify failed on 267162124288 wanted 51469 found 51528
Ignoring transid failure
parent transid verify failed on 108351488 wanted 51468 found 51528
parent transid verify failed on 108351488 wanted 51468 found 51528
parent transid verify failed on 108351488 wanted 51468 found 51528
parent transid verify failed on 108351488 wanted 51468 found 51528
Ignoring transid failure
parent transid verify failed on 275021406208 wanted 51469 found 51529
parent transid verify failed on 275021406208 wanted 51469 found 51529
parent transid verify failed on 275021406208 wanted 51469 found 51529
parent transid verify failed on 275021406208 wanted 51469 found 51529
Ignoring transid failure
parent transid verify failed on 108466176 wanted 51468 found 51528
parent transid verify failed on 108466176 wanted 51468 found 51528
parent transid verify failed on 108466176 wanted 51468 found 51528
parent transid verify failed on 108466176 wanted 51468 found 51528
Ignoring transid failure
Segmentation fault
Comment 1 David Sterba 2014-03-24 11:42:05 UTC 
Right, the mount status should be checked. It should be possible to do image from a read-only mounted fs.