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HADOOP-10220. Add ACL indicator bit to FsPermission. Contributed by Chris Nauroth.

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1557293 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Chris Nauroth 2014-01-11 00:36:00 +00:00
parent 17ab35314f
commit f065f58292
4 changed files with 118 additions and 49 deletions
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3
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/RawLocalFileSystem.java
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@ -560,9 +560,6 @@ private void loadPermissionInfo() {
//expected format
//-rw------- 1 username groupname ...
String permission = t.nextToken();
if (permission.length() > 10) { //files with ACLs might have a '+'
permission = permission.substring(0, 10);
}
setPermission(FsPermission.valueOf(permission));
t.nextToken();

64
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/permission/FsPermission.java
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@ -58,6 +58,7 @@ public static FsPermission createImmutable(short permission) {
private FsAction groupaction = null;
private FsAction otheraction = null;
private boolean stickyBit = false;
private boolean aclBit = false;
private FsPermission() {}
@ -72,7 +73,20 @@ public FsPermission(FsAction u, FsAction g, FsAction o) {
}
public FsPermission(FsAction u, FsAction g, FsAction o, boolean sb) {
set(u, g, o, sb);
this(u, g, o, sb, false);
}
/**
* Construct by the given {@link FsAction} and special bits.
* @param u user action
* @param g group action
* @param o other action
* @param sb sticky bit
* @param ab ACL bit
*/
public FsPermission(FsAction u, FsAction g, FsAction o, boolean sb,
boolean ab) {
set(u, g, o, sb, ab);
}
/**
@ -92,6 +106,7 @@ public FsPermission(FsPermission other) {
this.groupaction = other.groupaction;
this.otheraction = other.otheraction;
this.stickyBit = other.stickyBit;
this.aclBit = other.aclBit;
}
/**
@ -112,17 +127,19 @@ public FsPermission(String mode) {
/** Return other {@link FsAction}. */
public FsAction getOtherAction() {return otheraction;}
private void set(FsAction u, FsAction g, FsAction o, boolean sb) {
private void set(FsAction u, FsAction g, FsAction o, boolean sb, boolean ab) {
useraction = u;
groupaction = g;
otheraction = o;
stickyBit = sb;
aclBit = ab;
}
public void fromShort(short n) {
FsAction[] v = FsAction.values();
set(v[(n >>> 6) & 7], v[(n >>> 3) & 7], v[n & 7], (((n >>> 9) & 1) == 1) );
set(v[(n >>> 6) & 7], v[(n >>> 3) & 7], v[n & 7], (((n >>> 9) & 1) == 1),
(((n >>> 10) & 1) == 1) );
}
@Override
@ -148,7 +165,8 @@ public static FsPermission read(DataInput in) throws IOException {
* Encode the object to a short.
*/
public short toShort() {
int s = (stickyBit ? 1 << 9 : 0) |
int s = (aclBit ? 1 << 10 : 0) |
(stickyBit ? 1 << 9 : 0) |
(useraction.ordinal() << 6) |
(groupaction.ordinal() << 3) |
otheraction.ordinal();
@ -163,7 +181,8 @@ public boolean equals(Object obj) {
return this.useraction == that.useraction
&& this.groupaction == that.groupaction
&& this.otheraction == that.otheraction
&& this.stickyBit == that.stickyBit;
&& this.stickyBit == that.stickyBit
&& this.aclBit == that.aclBit;
}
return false;
}
@ -173,15 +192,19 @@ public boolean equals(Object obj) {
@Override
public String toString() {
String str = useraction.SYMBOL + groupaction.SYMBOL + otheraction.SYMBOL;
StringBuilder sb = new StringBuilder();
sb.append(useraction.SYMBOL);
sb.append(groupaction.SYMBOL);
sb.append(otheraction.SYMBOL);
if (stickyBit) {
StringBuilder str2 = new StringBuilder(str);
str2.replace(str2.length() - 1, str2.length(),
sb.replace(sb.length() - 1, sb.length(),
otheraction.implies(FsAction.EXECUTE) ? "t" : "T");
str = str2.toString();
}
if (aclBit) {
sb.append('+');
}
return str;
return sb.toString();
}
/**
@ -269,6 +292,15 @@ public boolean getStickyBit() {
return stickyBit;
}
/**
* Returns true if there is also an ACL (access control list).
*
* @return boolean true if there is also an ACL (access control list).
*/
public boolean getAclBit() {
return aclBit;
}
/** Set the user file creation mask (umask) */
public static void setUMask(Configuration conf, FsPermission umask) {
conf.set(UMASK_LABEL, String.format("%1$03o", umask.toShort()));
@ -318,13 +350,14 @@ public static FsPermission valueOf(String unixSymbolicPermission) {
if (unixSymbolicPermission == null) {
return null;
}
else if (unixSymbolicPermission.length() != 10) {
throw new IllegalArgumentException("length != 10(unixSymbolicPermission="
else if (unixSymbolicPermission.length() != 10 &&
unixSymbolicPermission.length() != 11) {
throw new IllegalArgumentException("invalid length(unixSymbolicPermission="
+ unixSymbolicPermission + ")");
}
int n = 0;
for(int i = 1; i < unixSymbolicPermission.length(); i++) {
for(int i = 1; i < 10; i++) {
n = n << 1;
char c = unixSymbolicPermission.charAt(i);
n += (c == '-' || c == 'T' || c == 'S') ? 0: 1;
@ -335,6 +368,11 @@ else if (unixSymbolicPermission.length() != 10) {
unixSymbolicPermission.charAt(9) == 'T')
n += 01000;
// Add ACL bit value if set
if (unixSymbolicPermission.length() == 11 &&
unixSymbolicPermission.charAt(10) == '+')
n += (1 << 10);
return new FsPermission((short)n);
}

64
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/permission/TestFsPermission.java
View File

@ -54,7 +54,7 @@ public void testFsAction() {
* the expected values back out for all combinations
*/
public void testConvertingPermissions() {
for(short s = 0; s < 01777; s++) {
for(short s = 0; s <= 03777; s++) {
assertEquals(s, new FsPermission(s).toShort());
}
@ -64,10 +64,21 @@ public void testConvertingPermissions() {
for(FsAction u : FsAction.values()) {
for(FsAction g : FsAction.values()) {
for(FsAction o : FsAction.values()) {
// Cover constructor with sticky bit.
FsPermission f = new FsPermission(u, g, o, sb);
assertEquals(s, f.toShort());
FsPermission f2 = new FsPermission(f);
assertEquals(s, f2.toShort());
// Cover constructor with sticky bit and ACL bit.
for(boolean ab : new boolean [] { false, true }) {
short s2 = (short)(ab ? s | (1 << 10) : s);
FsPermission f3 = new FsPermission(u, g, o, sb, ab);
assertEquals(s2, f3.toShort());
FsPermission f4 = new FsPermission(f3);
assertEquals(s2, f4.toShort());
}
s++;
}
}
@ -75,21 +86,33 @@ public void testConvertingPermissions() {
}
}
public void testStickyBitToString() {
// Check that every permission has its sticky bit represented correctly
public void testSpecialBitsToString() {
for(boolean ab : new boolean [] { false, true }) {
for(boolean sb : new boolean [] { false, true }) {
for(FsAction u : FsAction.values()) {
for(FsAction g : FsAction.values()) {
for(FsAction o : FsAction.values()) {
FsPermission f = new FsPermission(u, g, o, sb);
FsPermission f = new FsPermission(u, g, o, sb, ab);
String fString = f.toString();
// Check that sticky bit is represented correctly.
if(f.getStickyBit() && f.getOtherAction().implies(EXECUTE))
assertEquals('t', f.toString().charAt(8));
assertEquals('t', fString.charAt(8));
else if(f.getStickyBit() && !f.getOtherAction().implies(EXECUTE))
assertEquals('T', f.toString().charAt(8));
assertEquals('T', fString.charAt(8));
else if(!f.getStickyBit() && f.getOtherAction().implies(EXECUTE))
assertEquals('x', f.toString().charAt(8));
assertEquals('x', fString.charAt(8));
else
assertEquals('-', f.toString().charAt(8));
assertEquals('-', fString.charAt(8));
// Check that ACL bit is represented correctly.
if (f.getAclBit()) {
assertEquals(10, fString.length());
assertEquals('+', fString.charAt(9));
} else {
assertEquals(9, fString.length());
}
}
}
}
}
@ -98,22 +121,31 @@ else if(!f.getStickyBit() && f.getOtherAction().implies(EXECUTE))
public void testFsPermission() {
String symbolic = "-rwxrwxrwx";
StringBuilder b = new StringBuilder("-123456789");
for(int i = 0; i < (1<<9); i++) {
for(int j = 1; j < 10; j++) {
b.setCharAt(j, '-');
}
String binary = Integer.toBinaryString(i);
for(int i = 0; i < (1 << 11); i++) {
StringBuilder b = new StringBuilder("----------");
String binary = String.format("%11s", Integer.toBinaryString(i));
String permBinary = binary.substring(2, binary.length());
int len = binary.length();
int len = permBinary.length();
for(int j = 0; j < len; j++) {
if (binary.charAt(j) == '1') {
if (permBinary.charAt(j) == '1') {
int k = 9 - (len - 1 - j);
b.setCharAt(k, symbolic.charAt(k));
}
}
// Check for sticky bit.
if (binary.charAt(1) == '1') {
char replacement = b.charAt(9) == 'x' ? 't' : 'T';
b.setCharAt(9, replacement);
}
// Check for ACL bit.
if (binary.charAt(0) == '1') {
b.append('+');
}
assertEquals(i, FsPermission.valueOf(b.toString()).toShort());
}
}

2
hadoop-hdfs-project/hadoop-hdfs/CHANGES-HDFS-4685.txt
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@ -28,6 +28,8 @@ HDFS-4685 (Unreleased)
HDFS-5673. Implement logic for modification of ACLs. (cnauroth)
HADOOP-10220. Add ACL indicator bit to FsPermission. (cnauroth)
OPTIMIZATIONS
BUG FIXES