[syserror] Refactor linuxerr and error package.

Move Error struct to pkg/errors package for use in multiple places.
Move linuxerr static definitions under pkg/errors/linuxerr.
Add a lookup list for quick lookup of *errors.Error by errno. This is useful
when converting syserror errors and unix.Errno/syscall.Errrno values to
*errors.Error.
Update benchmarks routines to include conversions.

The below benchmarks show *errors.Error usage to be comparable to using
unix.Errno.

BenchmarkAssignUnix
BenchmarkAssignUnix-32                 	787875022	         1.284 ns/op
BenchmarkAssignLinuxerr
BenchmarkAssignLinuxerr-32             	1000000000	         1.209 ns/op
BenchmarkAssignSyserror
BenchmarkAssignSyserror-32             	759269229	         1.429 ns/op
BenchmarkCompareUnix
BenchmarkCompareUnix-32                	1000000000	         1.310 ns/op
BenchmarkCompareLinuxerr
BenchmarkCompareLinuxerr-32            	1000000000	         1.241 ns/op
BenchmarkCompareSyserror
BenchmarkCompareSyserror-32            	147196165	         8.248 ns/op
BenchmarkSwitchUnix
BenchmarkSwitchUnix-32                 	373233556	         3.664 ns/op
BenchmarkSwitchLinuxerr
BenchmarkSwitchLinuxerr-32             	476323929	         3.294 ns/op
BenchmarkSwitchSyserror
BenchmarkSwitchSyserror-32             	39293408	        29.62 ns/op
BenchmarkReturnUnix
BenchmarkReturnUnix-32                 	1000000000	         0.5042 ns/op
BenchmarkReturnLinuxerr
BenchmarkReturnLinuxerr-32             	1000000000	         0.8152 ns/op
BenchmarkConvertUnixLinuxerr
BenchmarkConvertUnixLinuxerr-32        	739948875	         1.547 ns/op
BenchmarkConvertUnixLinuxerrZero
BenchmarkConvertUnixLinuxerrZero-32    	977733974	         1.489 ns/op

PiperOrigin-RevId: 379806801

1 files changed, 28 insertions, 28 deletions

diff --git a/pkg/syserr/netstack.go b/pkg/syserr/netstack.go
index 90be24e15..eb44f1254 100644
--- a/pkg/syserr/netstack.go
+++ b/pkg/syserr/netstack.go
@@ -17,7 +17,7 @@ package syserr
 import (
 	"fmt"
 
-	"gvisor.dev/gvisor/pkg/abi/linux"
+	"gvisor.dev/gvisor/pkg/abi/linux/errno"
 	"gvisor.dev/gvisor/pkg/tcpip"
 )
 
@@ -25,33 +25,33 @@ import (
 
 // Mapping for tcpip.Error types.
 var (
-	ErrUnknownProtocol       = New((&tcpip.ErrUnknownProtocol{}).String(), linux.EINVAL)
-	ErrUnknownNICID          = New((&tcpip.ErrUnknownNICID{}).String(), linux.ENODEV)
-	ErrUnknownDevice         = New((&tcpip.ErrUnknownDevice{}).String(), linux.ENODEV)
-	ErrUnknownProtocolOption = New((&tcpip.ErrUnknownProtocolOption{}).String(), linux.ENOPROTOOPT)
-	ErrDuplicateNICID        = New((&tcpip.ErrDuplicateNICID{}).String(), linux.EEXIST)
-	ErrDuplicateAddress      = New((&tcpip.ErrDuplicateAddress{}).String(), linux.EEXIST)
-	ErrAlreadyBound          = New((&tcpip.ErrAlreadyBound{}).String(), linux.EINVAL)
-	ErrInvalidEndpointState  = New((&tcpip.ErrInvalidEndpointState{}).String(), linux.EINVAL)
-	ErrAlreadyConnecting     = New((&tcpip.ErrAlreadyConnecting{}).String(), linux.EALREADY)
-	ErrNoPortAvailable       = New((&tcpip.ErrNoPortAvailable{}).String(), linux.EAGAIN)
-	ErrPortInUse             = New((&tcpip.ErrPortInUse{}).String(), linux.EADDRINUSE)
-	ErrBadLocalAddress       = New((&tcpip.ErrBadLocalAddress{}).String(), linux.EADDRNOTAVAIL)
-	ErrClosedForSend         = New((&tcpip.ErrClosedForSend{}).String(), linux.EPIPE)
-	ErrClosedForReceive      = New((&tcpip.ErrClosedForReceive{}).String(), linux.NOERRNO)
-	ErrTimeout               = New((&tcpip.ErrTimeout{}).String(), linux.ETIMEDOUT)
-	ErrAborted               = New((&tcpip.ErrAborted{}).String(), linux.EPIPE)
-	ErrConnectStarted        = New((&tcpip.ErrConnectStarted{}).String(), linux.EINPROGRESS)
-	ErrDestinationRequired   = New((&tcpip.ErrDestinationRequired{}).String(), linux.EDESTADDRREQ)
-	ErrNotSupported          = New((&tcpip.ErrNotSupported{}).String(), linux.EOPNOTSUPP)
-	ErrQueueSizeNotSupported = New((&tcpip.ErrQueueSizeNotSupported{}).String(), linux.ENOTTY)
-	ErrNoSuchFile            = New((&tcpip.ErrNoSuchFile{}).String(), linux.ENOENT)
-	ErrInvalidOptionValue    = New((&tcpip.ErrInvalidOptionValue{}).String(), linux.EINVAL)
-	ErrBroadcastDisabled     = New((&tcpip.ErrBroadcastDisabled{}).String(), linux.EACCES)
-	ErrNotPermittedNet       = New((&tcpip.ErrNotPermitted{}).String(), linux.EPERM)
-	ErrBadBuffer             = New((&tcpip.ErrBadBuffer{}).String(), linux.EFAULT)
-	ErrMalformedHeader       = New((&tcpip.ErrMalformedHeader{}).String(), linux.EINVAL)
-	ErrInvalidPortRange      = New((&tcpip.ErrInvalidPortRange{}).String(), linux.EINVAL)
+	ErrUnknownProtocol       = New((&tcpip.ErrUnknownProtocol{}).String(), errno.EINVAL)
+	ErrUnknownNICID          = New((&tcpip.ErrUnknownNICID{}).String(), errno.ENODEV)
+	ErrUnknownDevice         = New((&tcpip.ErrUnknownDevice{}).String(), errno.ENODEV)
+	ErrUnknownProtocolOption = New((&tcpip.ErrUnknownProtocolOption{}).String(), errno.ENOPROTOOPT)
+	ErrDuplicateNICID        = New((&tcpip.ErrDuplicateNICID{}).String(), errno.EEXIST)
+	ErrDuplicateAddress      = New((&tcpip.ErrDuplicateAddress{}).String(), errno.EEXIST)
+	ErrAlreadyBound          = New((&tcpip.ErrAlreadyBound{}).String(), errno.EINVAL)
+	ErrInvalidEndpointState  = New((&tcpip.ErrInvalidEndpointState{}).String(), errno.EINVAL)
+	ErrAlreadyConnecting     = New((&tcpip.ErrAlreadyConnecting{}).String(), errno.EALREADY)
+	ErrNoPortAvailable       = New((&tcpip.ErrNoPortAvailable{}).String(), errno.EAGAIN)
+	ErrPortInUse             = New((&tcpip.ErrPortInUse{}).String(), errno.EADDRINUSE)
+	ErrBadLocalAddress       = New((&tcpip.ErrBadLocalAddress{}).String(), errno.EADDRNOTAVAIL)
+	ErrClosedForSend         = New((&tcpip.ErrClosedForSend{}).String(), errno.EPIPE)
+	ErrClosedForReceive      = New((&tcpip.ErrClosedForReceive{}).String(), errno.NOERRNO)
+	ErrTimeout               = New((&tcpip.ErrTimeout{}).String(), errno.ETIMEDOUT)
+	ErrAborted               = New((&tcpip.ErrAborted{}).String(), errno.EPIPE)
+	ErrConnectStarted        = New((&tcpip.ErrConnectStarted{}).String(), errno.EINPROGRESS)
+	ErrDestinationRequired   = New((&tcpip.ErrDestinationRequired{}).String(), errno.EDESTADDRREQ)
+	ErrNotSupported          = New((&tcpip.ErrNotSupported{}).String(), errno.EOPNOTSUPP)
+	ErrQueueSizeNotSupported = New((&tcpip.ErrQueueSizeNotSupported{}).String(), errno.ENOTTY)
+	ErrNoSuchFile            = New((&tcpip.ErrNoSuchFile{}).String(), errno.ENOENT)
+	ErrInvalidOptionValue    = New((&tcpip.ErrInvalidOptionValue{}).String(), errno.EINVAL)
+	ErrBroadcastDisabled     = New((&tcpip.ErrBroadcastDisabled{}).String(), errno.EACCES)
+	ErrNotPermittedNet       = New((&tcpip.ErrNotPermitted{}).String(), errno.EPERM)
+	ErrBadBuffer             = New((&tcpip.ErrBadBuffer{}).String(), errno.EFAULT)
+	ErrMalformedHeader       = New((&tcpip.ErrMalformedHeader{}).String(), errno.EINVAL)
+	ErrInvalidPortRange      = New((&tcpip.ErrInvalidPortRange{}).String(), errno.EINVAL)
 )
 
 // TranslateNetstackError converts an error from the tcpip package to a sentry