[PATCH RESEND 0/1] ocfs2: fix reflink preserve cleanup issue

[Heming Zhao <heming.zhao@suse.com>]

why resend?
I pasted incorrect ocfs2-tools test cases.
(only modified the cover-letter; no code changes)
-----

Linus and Andrew are busy, so I don't include them in the patch review phase.
This patch continues Linus's job to fix the remaining issue in the reflink
preserve path.

The patch passed the following tests.

from xfstests:

```
./check -g quick -T -b -s ocfs2 -e generic/032 -e generic/076 \
-e generic/081 -e generic/266 -e generic/272 -e generic/281 \
-e generic/331 -e generic/338 -e generic/347 -e generic/361 \
-e generic/479 -e generic/480 -e generic/628 -e generic/629 \
-e generic/648 -e generic/650
```


from ocfs2-test:

```
single_run-WIP.sh -f 1 -k /usr/local/ocfs2-test/tmp/linux-2.6.39.tar.gz -l /usr/local/ocfs2-test/log -m /mnt/ocfs2 -d /dev/vde -b 4096 -c 32768 -s pcmk -n hacluster -t inline,xattr,reflink

discontig_runner.sh -f 1 -d /dev/vde -b 4096 -c 32768 -s pcmk -n hacluster /mnt/ocfs2
```

special test:
(reflink command is from ocfs2-tools)

```
## this case will leave one entry after cleanup job
## create file
cp /usr/bin/basename /mnt/ocfs2/a0
## set OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS
setfacl -m u:ocfs2test:rwx /mnt/ocfs2/a0
## check, will output: "user:ocfs2test:rwx"
getfacl /mnt/ocfs2/a0
## set OCFS2_XATTR_INDEX_USER, don't trigger cleanup
setfattr -n user.comment -v "tst-xattr" /mnt/ocfs2/a0
## check, will output: "tst-xattr"
getfattr -n user.comment /mnt/ocfs2/a0
## set OCFS2_XATTR_INDEX_SECURITY
setfattr -n security.selinux -v "unconfined_u:object_r:user_home_t:s0" /mnt/ocfs2/a0
## reflink non-preserve
reflink /mnt/ocfs2/a0 /mnt/ocfs2/ra0
## reflink preserve
reflink -p /mnt/ocfs2/a0 /mnt/ocfs2/ra0-p
## check
getfacl /mnt/ocfs2/ra0  # "user:ocfs2test:rwx" non-exist
getfacl /mnt/ocfs2/ra0-p
getfattr -n user.comment /mnt/ocfs2/ra0 # "tst-xattr" exist
getfattr -n user.comment /mnt/ocfs2/ra0-p
getfattr -n security.selinux /mnt/ocfs2/ra0 # no security attr item
getfattr -n security.selinux /mnt/ocfs2/ra0-p


## this case will trigger cleaning up all array entries.
## create file. then set file with OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS and 
## OCFS2_XATTR_INDEX_SECURITY
cp /usr/bin/basename /mnt/ocfs2/b0
setfacl -m u:ocfs2test:rwx /mnt/ocfs2/b0
setfattr -n security.selinux -v "unconfined_u:object_r:user_home_t:s0" /mnt/ocfs2/b0
## reflink non-preserve
reflink /mnt/ocfs2/b0 /mnt/ocfs2/rb0
## reflink preserve
reflink -p /mnt/ocfs2/b0 /mnt/ocfs2/rb0-p
## check
getfacl /mnt/ocfs2/rb0 # "user:ocfs2test:rwx" non-exist
getfacl /mnt/ocfs2/rb0-p
getfattr -n security.selinux /mnt/ocfs2/rb0 # no security attr item
getfattr -n security.selinux /mnt/ocfs2/rb0-p
```


Heming Zhao (1):
  ocfs2: fix reflink preserve cleanup issue

 fs/ocfs2/xattr.c | 4 ++++
 1 file changed, 4 insertions(+)

-- 
2.43.0