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HDFS-9019. Adding informative message to sticky bit permission denied exception. Contributed by Xiaoyu Yao.

This commit is contained in:
Xiaoyu Yao 2015-09-08 09:57:36 -07:00
parent 090d26652c
commit 970daaa5e4
3 changed files with 17 additions and 5 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
View File

@ -900,6 +900,9 @@ Release 2.8.0 - UNRELEASED
HDFS-8984. Move replication queues related methods in FSNamesystem to
BlockManager. (wheat9)
HDFS-9019. Adding informative message to sticky bit permission denied
exception. (xyao)
OPTIMIZATIONS
HDFS-8026. Trace FSOutputSummer#writeChecksumChunks rather than

16
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSPermissionChecker.java
View File

@ -207,7 +207,7 @@ public void checkPermission(String fsOwner, String supergroup,
final INodeAttributes last = inodeAttrs[inodeAttrs.length - 1];
if (parentAccess != null && parentAccess.implies(FsAction.WRITE)
&& inodeAttrs.length > 1 && last != null) {
checkStickyBit(inodeAttrs[inodeAttrs.length - 2], last);
checkStickyBit(inodeAttrs[inodeAttrs.length - 2], last, path);
}
if (ancestorAccess != null && inodeAttrs.length > 1) {
check(inodeAttrs, path, ancestorIndex, ancestorAccess);
@ -405,8 +405,8 @@ private void checkAccessAcl(INodeAttributes inode, String path,
}
/** Guarded by {@link FSNamesystem#readLock()} */
private void checkStickyBit(INodeAttributes parent, INodeAttributes inode
) throws AccessControlException {
private void checkStickyBit(INodeAttributes parent, INodeAttributes inode,
String path) throws AccessControlException {
if (!parent.getFsPermission().getStickyBit()) {
return;
}
@ -421,8 +421,14 @@ private void checkStickyBit(INodeAttributes parent, INodeAttributes inode
return;
}
throw new AccessControlException("Permission denied by sticky bit setting:" +
" user=" + getUser() + ", inode=" + inode);
throw new AccessControlException(String.format(
"Permission denied by sticky bit: user=%s, path=\"%s\":%s:%s:%s%s, " +
"parent=\"%s\":%s:%s:%s%s", user,
path, inode.getUserName(), inode.getGroupName(),
inode.isDirectory() ? "d" : "-", inode.getFsPermission().toString(),
path.substring(0, path.length() - inode.toString().length() - 1 ),
parent.getUserName(), parent.getGroupName(),
parent.isDirectory() ? "d" : "-", parent.getFsPermission().toString()));
}
/**

3
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/fs/permission/TestStickyBit.java
View File

@ -140,6 +140,9 @@ private void confirmDeletingFiles(Configuration conf, Path p)
} catch (IOException ioe) {
assertTrue(ioe instanceof AccessControlException);
assertTrue(ioe.getMessage().contains("sticky bit"));
assertTrue(ioe.getMessage().contains("user="+user2.getUserName()));
assertTrue(ioe.getMessage().contains("path=\"" + file + "\""));
assertTrue(ioe.getMessage().contains("parent=\"" + file.getParent() + "\""));
}
}