func TestDonateHard(t *testing.T) {
//common.InitDefaultLogging(true)
var (
start = ip("10.0.1.0")
size address.Offset = 48
)
// Fill a fresh space
spaceset := makeSpace(start, size)
for i := address.Offset(0); i < size; i++ {
ok, _ := spaceset.Allocate(address.NewRange(start, size))
require.True(t, ok, "Failed to get IP!")
}
require.Equal(t, address.Count(0), spaceset.NumFreeAddresses())
// Now free all but the last address
// this will force us to split the free list
for i := address.Offset(0); i < size-1; i++ {
require.NoError(t, spaceset.Free(address.Add(start, i)))
}
// Now split
newRange, ok := spaceset.Donate(address.NewRange(start, size))
require.True(t, ok, "GiveUpSpace result")
require.Equal(t, address.NewRange(ip("10.0.1.16"), 16), newRange, "Wrong space")
require.Equal(t, address.Count(31), spaceset.NumFreeAddresses())
//Space set should now have 3 spaces
expected := &Space{
ours: add(nil, ip("10.0.1.47"), ip("10.0.1.48")),
free: add(add(nil, ip("10.0.1.0"), ip("10.0.1.16")), ip("10.0.1.32"), ip("10.0.1.47")),
}
require.Equal(t, expected, spaceset)
}
func TestDonateSimple(t *testing.T) {
const (
testAddr1 = "10.0.1.0"
testAddr2 = "10.0.1.32"
size = 64
)
var (
ipAddr1 = ip(testAddr1)
)
ps1 := makeSpace(ipAddr1, size)
// Empty space set should split in two and give me the second half
r, ok := ps1.Donate(address.NewRange(ip(testAddr1), size))
numGivenUp := r.Size()
require.True(t, ok, "Donate result")
require.Equal(t, "10.0.1.32", r.Start.String(), "Invalid start")
require.Equal(t, address.Count(size/2), numGivenUp)
require.Equal(t, address.Count(size/2), ps1.NumFreeAddresses())
// Now check we can give the rest up.
count := 0 // count to avoid infinite loop
for ; count < 1000; count++ {
r, ok := ps1.Donate(address.NewRange(ip(testAddr1), size))
if !ok {
break
}
numGivenUp += r.Size()
}
require.Equal(t, address.Count(0), ps1.NumFreeAddresses())
require.Equal(t, address.Count(size), numGivenUp)
}
func TestSpaceFree(t *testing.T) {
const (
testAddr1 = "10.0.3.16"
testAddrx = "10.0.3.19"
testAddry = "10.0.9.19"
containerID = "deadbeef"
size = 16
)
entireRange := address.NewRange(ip(testAddr1), size)
space := makeSpace(ip(testAddr1), size)
// Check we are prepared to give up the entire space
r := space.biggestFreeRange(entireRange)
require.Equal(t, address.NewRange(ip(testAddr1), size), r, "Wrong space")
for i := 0; i < size; i++ {
ok, _ := space.Allocate(entireRange)
require.True(t, ok, "Failed to get address")
}
// Check we are full
ok, _ := space.Allocate(entireRange)
require.True(t, !ok, "Should have failed to get address")
r, _ = space.Donate(entireRange)
require.True(t, r.Size() == 0, "Wrong space")
// Free in the middle
require.NoError(t, space.Free(ip("10.0.3.23")))
r = space.biggestFreeRange(entireRange)
require.True(t, r.Start == ip("10.0.3.23") && r.Size() == 1, "Wrong space")
// Free one at the end
require.NoError(t, space.Free(ip("10.0.3.31")))
r = space.biggestFreeRange(entireRange)
require.True(t, r.Start == ip("10.0.3.31") && r.Size() == 1, "Wrong space")
// Now free a few at the end
require.NoError(t, space.Free(ip("10.0.3.30")))
require.NoError(t, space.Free(ip("10.0.3.29")))
require.Equal(t, address.Count(4), space.NumFreeAddresses())
// Now get the biggest free space; should be 3.30
r = space.biggestFreeRange(entireRange)
require.Equal(t, address.NewRange(ip("10.0.3.30"), 2), r, "Wrong space")
// Now free a few in the middle
require.NoError(t, space.Free(ip("10.0.3.24")))
require.NoError(t, space.Free(ip("10.0.3.22")))
require.NoError(t, space.Free(ip("10.0.3.21")))
require.Equal(t, address.Count(7), space.NumFreeAddresses())
// Now get the biggest free space; should be 3.30
r = space.biggestFreeRange(entireRange)
require.Equal(t, address.NewRange(ip("10.0.3.30"), 2), r, "Wrong space")
require.Equal(t, []address.Range{{Start: ip("10.0.3.16"), End: ip("10.0.3.32")}}, space.OwnedRanges())
}
// Try returns true for success (or failure), false if we need to try again later
func (c *claim) Try(alloc *Allocator) bool {
if !alloc.ring.Contains(c.addr) {
// Address not within our universe; assume user knows what they are doing
alloc.infof("Ignored address %s claimed by %s - not in our universe", c.addr, c.ident)
c.sendResult(nil)
return true
}
alloc.establishRing()
// If we had heard that this container died, resurrect it
delete(alloc.dead, c.ident) // (delete is no-op if key not in map)
switch owner := alloc.ring.Owner(c.addr); owner {
case alloc.ourName:
// success
case mesh.UnknownPeerName:
// If our ring doesn't know, it must be empty.
if c.noErrorOnUnknown {
alloc.infof("Claim %s for %s: address allocator still initializing; will try later.", c.addr, c.ident)
c.sendResult(nil)
} else {
c.sendResult(fmt.Errorf("%s is in the range %s, but the allocator is not initialized yet", c.addr, alloc.universe.AsCIDRString()))
}
return false
default:
alloc.debugf("requesting address %s from other peer %s", c.addr, owner)
err := alloc.sendSpaceRequest(owner, address.NewRange(c.addr, 1))
if err != nil { // can't speak to owner right now
if c.noErrorOnUnknown {
alloc.infof("Claim %s for %s: %s; will try later.", c.addr, c.ident, err)
c.sendResult(nil)
} else { // just tell the user they can't do this.
c.deniedBy(alloc, owner)
}
}
return false
}
// We are the owner, check we haven't given it to another container
switch existingIdent := alloc.findOwner(c.addr); existingIdent {
case "":
if err := alloc.space.Claim(c.addr); err == nil {
alloc.debugln("Claimed", c.addr, "for", c.ident)
alloc.addOwned(c.ident, c.addr)
c.sendResult(nil)
} else {
c.sendResult(err)
}
case c.ident:
// same identifier is claiming same address; that's OK
alloc.debugln("Re-Claimed", c.addr, "for", c.ident)
c.sendResult(nil)
default:
// Addr already owned by container on this machine
c.sendResult(fmt.Errorf("address %s is already owned by %s", c.addr.String(), existingIdent))
}
return true
}
func TestSpaceAllocate(t *testing.T) {
const (
testAddr1 = "10.0.3.4"
testAddr2 = "10.0.3.5"
testAddrx = "10.0.3.19"
testAddry = "10.0.9.19"
containerID = "deadbeef"
size = 20
)
var (
start = ip(testAddr1)
)
space1 := makeSpace(start, size)
require.Equal(t, address.Count(20), space1.NumFreeAddresses())
space1.assertInvariants()
_, addr1 := space1.Allocate(address.NewRange(start, size))
require.Equal(t, testAddr1, addr1.String(), "address")
require.Equal(t, address.Count(19), space1.NumFreeAddresses())
space1.assertInvariants()
_, addr2 := space1.Allocate(address.NewRange(start, size))
require.False(t, addr2.String() == testAddr1, "address")
require.Equal(t, address.Count(18), space1.NumFreeAddresses())
require.Equal(t, address.Count(13), space1.NumFreeAddressesInRange(address.Range{Start: ip(testAddr1), End: ip(testAddrx)}))
require.Equal(t, address.Count(18), space1.NumFreeAddressesInRange(address.Range{Start: ip(testAddr1), End: ip(testAddry)}))
space1.assertInvariants()
space1.Free(addr2)
space1.assertInvariants()
wt.AssertErrorInterface(t, (*error)(nil), space1.Free(addr2), "double free")
wt.AssertErrorInterface(t, (*error)(nil), space1.Free(ip(testAddrx)), "address not allocated")
wt.AssertErrorInterface(t, (*error)(nil), space1.Free(ip(testAddry)), "wrong out of range")
space1.assertInvariants()
}
// Try returns true for success (or failure), false if we need to try again later
func (c *claim) Try(alloc *Allocator) bool {
if !alloc.ring.Contains(c.addr) {
// Address not within our universe; assume user knows what they are doing
alloc.infof("Ignored address %s claimed by %s - not in our universe", c.addr, c.ident)
c.sendResult(nil)
return true
}
switch owner := alloc.ring.Owner(c.addr); owner {
case alloc.ourName:
// success
case router.UnknownPeerName:
// If our ring doesn't know, it must be empty.
alloc.infof("Claim %s for %s: address allocator still initializing; will try later.", c.addr, c.ident)
c.sendResult(nil) // don't make the caller wait
return false
default:
alloc.debugf("requesting address %s from other peer %s", c.addr, owner)
err := alloc.sendSpaceRequest(owner, address.NewRange(c.addr, 1))
if err != nil { // can't speak to owner right now; figure it out later
alloc.infof("Claim %s for %s: %s; will try later.", c.addr, c.ident, err)
c.sendResult(nil)
}
return false
}
// We are the owner, check we haven't given it to another container
switch existingIdent := alloc.findOwner(c.addr); existingIdent {
case "":
if err := alloc.space.Claim(c.addr); err == nil {
alloc.debugln("Claimed", c.addr, "for", c.ident)
alloc.addOwned(c.ident, c.addr)
c.sendResult(nil)
} else {
c.sendResult(err)
}
case c.ident:
// same identifier is claiming same address; that's OK
c.sendResult(nil)
default:
// Addr already owned by container on this machine
c.sendResult(fmt.Errorf("address %s is already owned by %s", c.addr.String(), existingIdent))
}
return true
}
func TestLowlevel(t *testing.T) {
a := []address.Address{}
a = add(a, 100, 200)
require.Equal(t, []address.Address{100, 200}, a)
require.True(t, !contains(a, 99), "")
require.True(t, contains(a, 100), "")
require.True(t, contains(a, 199), "")
require.True(t, !contains(a, 200), "")
a = add(a, 700, 800)
require.Equal(t, []address.Address{100, 200, 700, 800}, a)
a = add(a, 300, 400)
require.Equal(t, []address.Address{100, 200, 300, 400, 700, 800}, a)
a = add(a, 400, 500)
require.Equal(t, []address.Address{100, 200, 300, 500, 700, 800}, a)
a = add(a, 600, 700)
require.Equal(t, []address.Address{100, 200, 300, 500, 600, 800}, a)
a = add(a, 500, 600)
require.Equal(t, []address.Address{100, 200, 300, 800}, a)
a = subtract(a, 500, 600)
require.Equal(t, []address.Address{100, 200, 300, 500, 600, 800}, a)
a = subtract(a, 600, 700)
require.Equal(t, []address.Address{100, 200, 300, 500, 700, 800}, a)
a = subtract(a, 400, 500)
require.Equal(t, []address.Address{100, 200, 300, 400, 700, 800}, a)
a = subtract(a, 300, 400)
require.Equal(t, []address.Address{100, 200, 700, 800}, a)
a = subtract(a, 700, 800)
require.Equal(t, []address.Address{100, 200}, a)
a = subtract(a, 100, 200)
require.Equal(t, []address.Address{}, a)
s := New()
require.Equal(t, address.Count(0), s.NumFreeAddresses())
ok, got := s.Allocate(address.NewRange(0, 1000))
require.False(t, ok, "allocate in empty space should fail")
s.Add(100, 100)
require.Equal(t, address.Count(100), s.NumFreeAddresses())
ok, got = s.Allocate(address.NewRange(0, 1000))
require.True(t, ok && got == 100, "allocate")
require.Equal(t, address.Count(99), s.NumFreeAddresses())
require.NoError(t, s.Claim(150))
require.Equal(t, address.Count(98), s.NumFreeAddresses())
require.NoError(t, s.Free(100))
require.Equal(t, address.Count(99), s.NumFreeAddresses())
wt.AssertErrorInterface(t, (*error)(nil), s.Free(0), "free not allocated")
wt.AssertErrorInterface(t, (*error)(nil), s.Free(100), "double free")
r, ok := s.Donate(address.NewRange(0, 1000))
require.Equal(t, address.NewRange(0xa0, 0x20), r, "donate")
// test Donate when addresses are scarce
s = New()
r, ok = s.Donate(address.NewRange(0, 1000))
require.True(t, !ok, "donate on empty space should fail")
s.Add(0, 3)
require.NoError(t, s.Claim(0))
require.NoError(t, s.Claim(2))
r, ok = s.Donate(address.NewRange(0, 1000))
require.Equal(t, address.NewRange(1, 1), r, "donate")
r, ok = s.Donate(address.NewRange(0, 1000))
require.True(t, !ok, "donate should fail")
}