[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

2 files changed, 11 insertions, 7 deletions

diff --git a/pkg/syserr/BUILD b/pkg/syserr/BUILD
index ceee494fc..1cd5d641d 100644
--- a/pkg/syserr/BUILD
+++ b/pkg/syserr/BUILD
@@ -14,7 +14,6 @@ go_library(
         "//pkg/abi/linux/errno",
         "//pkg/errors",
         "//pkg/errors/linuxerr",
-        "//pkg/syserror",
         "//pkg/tcpip",
         "@org_golang_x_sys//unix:go_default_library",
     ],
diff --git a/pkg/syserr/syserr.go b/pkg/syserr/syserr.go
index 558240008..a5e386e38 100644
--- a/pkg/syserr/syserr.go
+++ b/pkg/syserr/syserr.go
@@ -24,7 +24,6 @@ import (
 	"gvisor.dev/gvisor/pkg/abi/linux/errno"
 	"gvisor.dev/gvisor/pkg/errors"
 	"gvisor.dev/gvisor/pkg/errors/linuxerr"
-	"gvisor.dev/gvisor/pkg/syserror"
 )
 
 // Error represents an internal error.
@@ -52,12 +51,12 @@ func New(message string, linuxTranslation errno.Errno) *Error {
 	}
 
 	e := error(unix.Errno(err.errno))
-	// syserror.ErrWouldBlock gets translated to linuxerr.EWOULDBLOCK and
+	// linuxerr.ErrWouldBlock gets translated to linuxerr.EWOULDBLOCK and
 	// enables proper blocking semantics. This should temporary address the
 	// class of blocking bugs that keep popping up with the current state of
 	// the error space.
 	if err.errno == linuxerr.EWOULDBLOCK.Errno() {
-		e = syserror.ErrWouldBlock
+		e = linuxerr.ErrWouldBlock
 	}
 	linuxBackwardsTranslations[err.errno] = linuxBackwardsTranslation{err: e, ok: true}
 
@@ -287,8 +286,14 @@ func FromError(err error) *Error {
 		return FromHost(unix.Errno(linuxErr.Errno()))
 	}
 
-	if errno, ok := syserror.TranslateError(err); ok {
-		return FromHost(errno)
-	}
 	panic("unknown error: " + err.Error())
 }
+
+// ConvertIntr converts the provided error code (err) to another one (intr) if
+// the first error corresponds to an interrupted operation.
+func ConvertIntr(err, intr error) error {
+	if err == linuxerr.ErrInterrupted {
+		return intr
+	}
+	return err
+}