[syserror] Remove pkg syserror.

Removes package syserror and moves still relevant code to either linuxerr
or to syserr (to be later removed).

Internal errors are converted from random types to *errors.Error types used
in linuxerr. Internal errors are in linuxerr/internal.go.

PiperOrigin-RevId: 390724202

3 files changed, 4 insertions, 7 deletions

diff --git a/pkg/sentry/fsimpl/tmpfs/BUILD b/pkg/sentry/fsimpl/tmpfs/BUILD
index dc8b9bfeb..94486bb63 100644
--- a/pkg/sentry/fsimpl/tmpfs/BUILD
+++ b/pkg/sentry/fsimpl/tmpfs/BUILD
@@ -82,7 +82,6 @@ go_library(
         "//pkg/sentry/vfs",
         "//pkg/sentry/vfs/memxattr",
         "//pkg/sync",
-        "//pkg/syserror",
         "//pkg/usermem",
     ],
 )
@@ -125,7 +124,6 @@ go_test(
         "//pkg/sentry/fs/lock",
         "//pkg/sentry/kernel/auth",
         "//pkg/sentry/vfs",
-        "//pkg/syserror",
         "//pkg/usermem",
     ],
 )
diff --git a/pkg/sentry/fsimpl/tmpfs/pipe_test.go b/pkg/sentry/fsimpl/tmpfs/pipe_test.go
index 418c7994e..99afd9817 100644
--- a/pkg/sentry/fsimpl/tmpfs/pipe_test.go
+++ b/pkg/sentry/fsimpl/tmpfs/pipe_test.go
@@ -25,7 +25,6 @@ import (
 	"gvisor.dev/gvisor/pkg/sentry/contexttest"
 	"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
 	"gvisor.dev/gvisor/pkg/sentry/vfs"
-	"gvisor.dev/gvisor/pkg/syserror"
 	"gvisor.dev/gvisor/pkg/usermem"
 )
 
@@ -202,7 +201,7 @@ func checkEmpty(ctx context.Context, t *testing.T, fd *vfs.FileDescription) {
 	readData := make([]byte, 1)
 	dst := usermem.BytesIOSequence(readData)
 	bytesRead, err := fd.Read(ctx, dst, vfs.ReadOptions{})
-	if err != syserror.ErrWouldBlock {
+	if err != linuxerr.ErrWouldBlock {
 		t.Fatalf("expected ErrWouldBlock reading from empty pipe %q, but got: %v", fileName, err)
 	}
 	if bytesRead != 0 {
diff --git a/pkg/sentry/fsimpl/tmpfs/regular_file_test.go b/pkg/sentry/fsimpl/tmpfs/regular_file_test.go
index 4393cc13b..cb7711b39 100644
--- a/pkg/sentry/fsimpl/tmpfs/regular_file_test.go
+++ b/pkg/sentry/fsimpl/tmpfs/regular_file_test.go
@@ -21,10 +21,10 @@ import (
 	"testing"
 
 	"gvisor.dev/gvisor/pkg/abi/linux"
+	"gvisor.dev/gvisor/pkg/errors/linuxerr"
 	"gvisor.dev/gvisor/pkg/sentry/contexttest"
 	"gvisor.dev/gvisor/pkg/sentry/fs/lock"
 	"gvisor.dev/gvisor/pkg/sentry/vfs"
-	"gvisor.dev/gvisor/pkg/syserror"
 	"gvisor.dev/gvisor/pkg/usermem"
 )
 
@@ -146,7 +146,7 @@ func TestLocks(t *testing.T) {
 	if err := fd.Impl().LockBSD(ctx, uid2, 0 /* ownerPID */, lock.ReadLock, nil); err != nil {
 		t.Fatalf("fd.Impl().LockBSD failed: err = %v", err)
 	}
-	if got, want := fd.Impl().LockBSD(ctx, uid2, 0 /* ownerPID */, lock.WriteLock, nil), syserror.ErrWouldBlock; got != want {
+	if got, want := fd.Impl().LockBSD(ctx, uid2, 0 /* ownerPID */, lock.WriteLock, nil), linuxerr.ErrWouldBlock; got != want {
 		t.Fatalf("fd.Impl().LockBSD failed: got = %v, want = %v", got, want)
 	}
 	if err := fd.Impl().UnlockBSD(ctx, uid1); err != nil {
@@ -165,7 +165,7 @@ func TestLocks(t *testing.T) {
 	if err := fd.Impl().LockPOSIX(ctx, uid1, 0 /* ownerPID */, lock.WriteLock, lock.LockRange{Start: 0, End: 1}, nil); err != nil {
 		t.Fatalf("fd.Impl().LockPOSIX failed: err = %v", err)
 	}
-	if got, want := fd.Impl().LockPOSIX(ctx, uid2, 0 /* ownerPID */, lock.ReadLock, lock.LockRange{Start: 0, End: 1}, nil), syserror.ErrWouldBlock; got != want {
+	if got, want := fd.Impl().LockPOSIX(ctx, uid2, 0 /* ownerPID */, lock.ReadLock, lock.LockRange{Start: 0, End: 1}, nil), linuxerr.ErrWouldBlock; got != want {
 		t.Fatalf("fd.Impl().LockPOSIX failed: got = %v, want = %v", got, want)
 	}
 	if err := fd.Impl().UnlockPOSIX(ctx, uid1, lock.LockRange{Start: 0, End: 1}); err != nil {