No Write Permission on ACFS Mount Point

电玩女神 2022-08-08 03:19 104阅读 0赞

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## APPLIES TO: ##

Oracle Database - Enterprise Edition - Version 11.2.0.3 to 11.2.0.3 \[Release 11.2\]  
Linux x86-64

## SYMPTOMS ##

As oracle/ Grid user

oracle@ <name> ~\]$ cd /backup/  
\[oracle@ <name> backup\]$ touch test  
touch: cannot touch \`test': Permission denied  
\[oracle@ <name> backup\]$

As root

\[root@<name> oracle\]\# cd /backup/  
\[root@ <name> backup\]\# touch test  
touch: cannot touch \`test': Permission denied  
\[root@ <name> backup\]\#

The permission on the mount point was 755 -- still they had the above issue.

You are trying to vi open a General Purpose ACFS and encountering

E212: Can't open file for writing

## CHANGES ##

none

## CAUSE ##

SELinux is enabled on the system

strace -aef -o /temp/strace.out vi test.txt

shows:  
  
  
open("/lib64/libselinux.so.1", O\_RDONLY) = 3      <----------------- here   
...  
open("/proc/self/task/9688/attr/current", O\_RDONLY) = 4  
read(4, "unconfined\_u:unconfined\_r:unconf"..., 4095) = 54  
close(4) = 0  
getxattr("/var/tmp/test.txt.swp", "security.selinux",  
"unconfined\_u:object\_r:user\_tmp\_t:s0", 255) = 36  <--------------- here  
open("/selinux/mls", O\_RDONLY) = 4  
read(4, "1", 19) = 1  
close(4) = 0  
socket(PF\_FILE, SOCK\_STREAM|SOCK\_CLOEXEC, 0) = 4  
connect(4, \{sa\_family=AF\_FILE, path="/var/run/setrans/.setrans-unix"\}, 110) =  
\-1 ENOENT (No such file or directory)  
close(4) = 0  
getxattr("/var/tmp/test.txt.swp", "security.selinux",  
"unconfined\_u:object\_r:user\_tmp\_t:s0", 255) = 36  
lseek(3, 0, SEEK\_SET) = 0  
write(3, "b0VIM 7.2\\0\\0\\0\\0\\20\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\330%\\0\\0grid"..., 4096) =  
4096  
select(1, \[0\], NULL, \[0\], \{0, 0\}) = 0 (Timeout)

## SOLUTION ##

Disable SELinux -- They were able to create the files in the acfs directory

Documentation reference for compatibility of SELinux and ACFS:  
\-------------------------------------------------------------------------------------------------  
http://st-doc.us.oracle.com/11/112/install.112/e41961/storage.htm\#CWLIN257  
Oracle® Grid Infrastructure Installation Guide  
11g Release 2 (11.2) for Linux  
E41961-03  
Note:  
Deployment of Security Enhanced Linux (SELinux) is not supported on Oracle  
ACFS file systems.  
\-------------------------------------------------------------------------------------------------  
  
Please use 'sestatus' to check if SELinux is enabled. If enabled, it must be disabled.

**In this Document**

<table style="color:rgb(0,0,0); font-family:Simsun; font-size:12px"> 
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   <td><a href="https://support.oracle.com/epmos/faces/SearchDocDisplay?_adf.ctrl-state=iv133o9q4_4&amp;_afrLoop=356892680030077#CAUSE" rel="nofollow">Cause</a></td> 
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<table style="color:rgb(0,0,0); font-family:Simsun; font-size:12px"> 
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   <td>&nbsp;</td> 
   <td><a href="https://support.oracle.com/epmos/faces/SearchDocDisplay?_adf.ctrl-state=iv133o9q4_4&amp;_afrLoop=356892680030077#FIX" rel="nofollow">Solution</a></td> 
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--------------------

## APPLIES TO: ##

Oracle Database - Standard Edition - Version 11.2.0.3 and later  
Information in this document applies to any platform.

## SYMPTOMS ##

Touching a file on ACFS filesystem gives permisison denied error

cd /u01/app/oracle/product/11.2.0/dbhome\_1  
\[root@oracsort2 dbhome\_1\]$ touch kk  
touch: cannot touch \`kk': Permission denied

## CAUSE ##

Selinux is enabled causing the issue.

## SOLUTION ##

Disable selinux and try the touch again