[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

4 files changed, 4 insertions, 7 deletions

diff --git a/pkg/sentry/fsimpl/host/BUILD b/pkg/sentry/fsimpl/host/BUILD
index 476545d00..180a35583 100644
--- a/pkg/sentry/fsimpl/host/BUILD
+++ b/pkg/sentry/fsimpl/host/BUILD
@@ -70,7 +70,6 @@ go_library(
         "//pkg/sentry/vfs",
         "//pkg/sync",
         "//pkg/syserr",
-        "//pkg/syserror",
         "//pkg/tcpip",
         "//pkg/unet",
         "//pkg/usermem",
diff --git a/pkg/sentry/fsimpl/host/host.go b/pkg/sentry/fsimpl/host/host.go
index 89aa7b3d9..984c6e8ee 100644
--- a/pkg/sentry/fsimpl/host/host.go
+++ b/pkg/sentry/fsimpl/host/host.go
@@ -37,7 +37,6 @@ import (
 	unixsocket "gvisor.dev/gvisor/pkg/sentry/socket/unix"
 	"gvisor.dev/gvisor/pkg/sentry/vfs"
 	"gvisor.dev/gvisor/pkg/sync"
-	"gvisor.dev/gvisor/pkg/syserror"
 	"gvisor.dev/gvisor/pkg/usermem"
 	"gvisor.dev/gvisor/pkg/waiter"
 )
@@ -712,7 +711,7 @@ func (f *fileDescription) Read(ctx context.Context, dst usermem.IOSequence, opts
 			if total != 0 {
 				err = nil
 			} else {
-				err = syserror.ErrWouldBlock
+				err = linuxerr.ErrWouldBlock
 			}
 		}
 		return total, err
@@ -766,7 +765,7 @@ func (f *fileDescription) Write(ctx context.Context, src usermem.IOSequence, opt
 	if !i.seekable {
 		n, err := f.writeToHostFD(ctx, src, -1, opts.Flags)
 		if isBlockError(err) {
-			err = syserror.ErrWouldBlock
+			err = linuxerr.ErrWouldBlock
 		}
 		return n, err
 	}
diff --git a/pkg/sentry/fsimpl/host/tty.go b/pkg/sentry/fsimpl/host/tty.go
index 488157706..04ac73255 100644
--- a/pkg/sentry/fsimpl/host/tty.go
+++ b/pkg/sentry/fsimpl/host/tty.go
@@ -24,7 +24,6 @@ import (
 	"gvisor.dev/gvisor/pkg/sentry/unimpl"
 	"gvisor.dev/gvisor/pkg/sentry/vfs"
 	"gvisor.dev/gvisor/pkg/sync"
-	"gvisor.dev/gvisor/pkg/syserror"
 	"gvisor.dev/gvisor/pkg/usermem"
 )
 
@@ -368,5 +367,5 @@ func (t *TTYFileDescription) checkChange(ctx context.Context, sig linux.Signal)
 	//
 	// Linux ignores the result of kill_pgrp().
 	_ = pg.SendSignal(kernel.SignalInfoPriv(sig))
-	return syserror.ERESTARTSYS
+	return linuxerr.ERESTARTSYS
 }
diff --git a/pkg/sentry/fsimpl/host/util.go b/pkg/sentry/fsimpl/host/util.go
index 95d7ebe2e..9850f3f41 100644
--- a/pkg/sentry/fsimpl/host/util.go
+++ b/pkg/sentry/fsimpl/host/util.go
@@ -42,7 +42,7 @@ func timespecToStatxTimestamp(ts unix.Timespec) linux.StatxTimestamp {
 }
 
 // isBlockError checks if an error is EAGAIN or EWOULDBLOCK.
-// If so, they can be transformed into syserror.ErrWouldBlock.
+// If so, they can be transformed into linuxerr.ErrWouldBlock.
 func isBlockError(err error) bool {
 	return linuxerr.Equals(linuxerr.EAGAIN, err) || linuxerr.Equals(linuxerr.EWOULDBLOCK, err)
 }