Re: reiserfs+acl makes processes hang?

[Jan Engelhardt <jengelh@linux01.gwdg.de>]

>Hi,
>
>Here's how to reproduce:
>1. mount a reiserfs volume (loopmount will do) with "-o acl".
>2. create a directory "dir"
>3. set some default acl: setfacl -d -m u:username:rwX dir
>4. cd dir
>5. dd if=/dev/zero of=somefile1 bs=4k count=100000
>(the idea is to run out of space)
>6. now df should show 0 free space, if not then repeat 5.
>7. echo "1" > somefile2 # this should hang infinitely

Can't reproduce. My versions are:
mkreiserfs 3.6.18
Kernel 2.6.13-rc1


---Step 1---
10:25 shanghai:/mnt > dd if=/dev/zero of=blk count=64 bs=1M
64+0 records in
64+0 records out
67108864 bytes (67 MB) copied, 0.552862 seconds, 121 MB/s
10:26 shanghai:/mnt > mkreiserfs -f blk
mkreiserfs 3.6.18 (2003 www.namesys.com)

A pair of credits:
...
blk is not a block special device
Continue (y/n):y
Guessing about desired format.. Kernel 2.6.13-rc1 is running.
Format 3.6 with standard journal
Count of blocks on the device: 16384
Number of blocks consumed by mkreiserfs formatting process: 8212
Blocksize: 4096
Hash function used to sort names: "r5"
Journal Size 8193 blocks (first block 18)
Journal Max transaction length 1024
inode generation number: 0
UUID: aa3bd664-fde0-4552-9484-49bac0fb698f
Initializing journal - 0%....20%....40%....60%....80%....100%
Syncing..ok
ReiserFS is successfully created on blk.
10:26 shanghai:/mnt > mount blk loop -o loop,acl

---Step 2-7---
10:26 shanghai:/mnt > cd loop/
10:27 shanghai:/mnt/loop > md dir
10:27 shanghai:/mnt/loop > setfacl -d -m u:daemon:rwX dir
10:27 shanghai:/mnt/loop > cd dir
10:27 shanghai:/mnt/loop/dir > cat /dev/zero >blah
cat: write error: No space left on device
10:27 shanghai:/mnt/loop/dir > df .
Filesystem           1K-blocks      Used Available Use% Mounted on
/mnt/blk                 65528     65528         0 100% /mnt/loop
10:27 shanghai:/mnt/loop/dir > l
total 32684
drwxr-xr-x+ 2 root root       72 Jul 16 10:27 .
drwxr-xr-x  5 root root      104 Jul 16 10:27 ..
-rw-rw-r--+ 1 root root 33435648 Jul 16 10:27 blah
(That's ok, the other 32MB are for the journal)
10:27 shanghai:/mnt/loop/dir > echo "1" >blah
10:28 shanghai:/mnt/loop/dir > l blah
-rw-rw-r--+ 1 root root 2 Jul 16 10:28 blah



Jan Engelhardt
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