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-rw-r--r--pkg/sentry/vfs/BUILD1
-rw-r--r--pkg/sentry/vfs/anonfs.go9
-rw-r--r--pkg/sentry/vfs/filesystem.go8
-rw-r--r--pkg/sentry/vfs/vfs.go44
4 files changed, 53 insertions, 9 deletions
diff --git a/pkg/sentry/vfs/BUILD b/pkg/sentry/vfs/BUILD
index a2a06fc8f..bf4d27c7d 100644
--- a/pkg/sentry/vfs/BUILD
+++ b/pkg/sentry/vfs/BUILD
@@ -53,6 +53,7 @@ go_library(
"//pkg/sentry/kernel/auth",
"//pkg/sentry/limits",
"//pkg/sentry/memmap",
+ "//pkg/sentry/socket/unix/transport",
"//pkg/sync",
"//pkg/syserror",
"//pkg/usermem",
diff --git a/pkg/sentry/vfs/anonfs.go b/pkg/sentry/vfs/anonfs.go
index a62e43589..f58867066 100644
--- a/pkg/sentry/vfs/anonfs.go
+++ b/pkg/sentry/vfs/anonfs.go
@@ -21,6 +21,7 @@ import (
"gvisor.dev/gvisor/pkg/context"
"gvisor.dev/gvisor/pkg/fspath"
"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
+ "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport"
"gvisor.dev/gvisor/pkg/syserror"
"gvisor.dev/gvisor/pkg/usermem"
)
@@ -222,6 +223,14 @@ func (fs *anonFilesystem) UnlinkAt(ctx context.Context, rp *ResolvingPath) error
return syserror.EPERM
}
+// BoundEndpointAt implements FilesystemImpl.BoundEndpointAt.
+func (fs *anonFilesystem) BoundEndpointAt(ctx context.Context, rp *ResolvingPath) (transport.BoundEndpoint, error) {
+ if !rp.Final() {
+ return nil, syserror.ENOTDIR
+ }
+ return nil, syserror.ECONNREFUSED
+}
+
// ListxattrAt implements FilesystemImpl.ListxattrAt.
func (fs *anonFilesystem) ListxattrAt(ctx context.Context, rp *ResolvingPath) ([]string, error) {
if !rp.Done() {
diff --git a/pkg/sentry/vfs/filesystem.go b/pkg/sentry/vfs/filesystem.go
index 332decce6..7b7d233f9 100644
--- a/pkg/sentry/vfs/filesystem.go
+++ b/pkg/sentry/vfs/filesystem.go
@@ -21,6 +21,7 @@ import (
"gvisor.dev/gvisor/pkg/context"
"gvisor.dev/gvisor/pkg/fspath"
"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
+ "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport"
)
// A Filesystem is a tree of nodes represented by Dentries, which forms part of
@@ -460,6 +461,11 @@ type FilesystemImpl interface {
// RemovexattrAt returns ENOTSUP.
RemovexattrAt(ctx context.Context, rp *ResolvingPath, name string) error
+ // BoundEndpointAt returns the Unix socket endpoint bound at the path rp.
+ //
+ // - If a non-socket file exists at rp, then BoundEndpointAt returns ECONNREFUSED.
+ BoundEndpointAt(ctx context.Context, rp *ResolvingPath) (transport.BoundEndpoint, error)
+
// PrependPath prepends a path from vd to vd.Mount().Root() to b.
//
// If vfsroot.Ok(), it is the contextual VFS root; if it is encountered
@@ -482,7 +488,7 @@ type FilesystemImpl interface {
// Preconditions: vd.Mount().Filesystem().Impl() == this FilesystemImpl.
PrependPath(ctx context.Context, vfsroot, vd VirtualDentry, b *fspath.Builder) error
- // TODO: inotify_add_watch(); bind()
+ // TODO: inotify_add_watch()
}
// PrependPathAtVFSRootError is returned by implementations of
diff --git a/pkg/sentry/vfs/vfs.go b/pkg/sentry/vfs/vfs.go
index 03d1fb943..1708c1a53 100644
--- a/pkg/sentry/vfs/vfs.go
+++ b/pkg/sentry/vfs/vfs.go
@@ -38,6 +38,7 @@ import (
"gvisor.dev/gvisor/pkg/context"
"gvisor.dev/gvisor/pkg/fspath"
"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
+ "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport"
"gvisor.dev/gvisor/pkg/sync"
"gvisor.dev/gvisor/pkg/syserror"
)
@@ -230,7 +231,7 @@ func (vfs *VirtualFilesystem) getParentDirAndName(ctx context.Context, creds *au
}
if checkInvariants {
if rp.canHandleError(err) && rp.Done() {
- panic(fmt.Sprintf("%T.GetParentDentryAt() consumed all path components and returned %T", rp.mount.fs.impl, err))
+ panic(fmt.Sprintf("%T.GetParentDentryAt() consumed all path components and returned %v", rp.mount.fs.impl, err))
}
}
if !rp.handleError(err) {
@@ -271,7 +272,7 @@ func (vfs *VirtualFilesystem) LinkAt(ctx context.Context, creds *auth.Credential
}
if checkInvariants {
if rp.canHandleError(err) && rp.Done() {
- panic(fmt.Sprintf("%T.LinkAt() consumed all path components and returned %T", rp.mount.fs.impl, err))
+ panic(fmt.Sprintf("%T.LinkAt() consumed all path components and returned %v", rp.mount.fs.impl, err))
}
}
if !rp.handleError(err) {
@@ -307,7 +308,7 @@ func (vfs *VirtualFilesystem) MkdirAt(ctx context.Context, creds *auth.Credentia
}
if checkInvariants {
if rp.canHandleError(err) && rp.Done() {
- panic(fmt.Sprintf("%T.MkdirAt() consumed all path components and returned %T", rp.mount.fs.impl, err))
+ panic(fmt.Sprintf("%T.MkdirAt() consumed all path components and returned %v", rp.mount.fs.impl, err))
}
}
if !rp.handleError(err) {
@@ -340,7 +341,7 @@ func (vfs *VirtualFilesystem) MknodAt(ctx context.Context, creds *auth.Credentia
}
if checkInvariants {
if rp.canHandleError(err) && rp.Done() {
- panic(fmt.Sprintf("%T.MknodAt() consumed all path components and returned %T", rp.mount.fs.impl, err))
+ panic(fmt.Sprintf("%T.MknodAt() consumed all path components and returned %v", rp.mount.fs.impl, err))
}
}
if !rp.handleError(err) {
@@ -350,6 +351,33 @@ func (vfs *VirtualFilesystem) MknodAt(ctx context.Context, creds *auth.Credentia
}
}
+// BoundEndpointAt gets the bound endpoint at the given path, if one exists.
+func (vfs *VirtualFilesystem) BoundEndpointAt(ctx context.Context, creds *auth.Credentials, pop *PathOperation) (transport.BoundEndpoint, error) {
+ if !pop.Path.Begin.Ok() {
+ if pop.Path.Absolute {
+ return nil, syserror.ECONNREFUSED
+ }
+ return nil, syserror.ENOENT
+ }
+ rp := vfs.getResolvingPath(creds, pop)
+ for {
+ bep, err := rp.mount.fs.impl.BoundEndpointAt(ctx, rp)
+ if err == nil {
+ vfs.putResolvingPath(rp)
+ return bep, nil
+ }
+ if checkInvariants {
+ if rp.canHandleError(err) && rp.Done() {
+ panic(fmt.Sprintf("%T.BoundEndpointAt() consumed all path components and returned %v", rp.mount.fs.impl, err))
+ }
+ }
+ if !rp.handleError(err) {
+ vfs.putResolvingPath(rp)
+ return nil, err
+ }
+ }
+}
+
// OpenAt returns a FileDescription providing access to the file at the given
// path. A reference is taken on the returned FileDescription.
func (vfs *VirtualFilesystem) OpenAt(ctx context.Context, creds *auth.Credentials, pop *PathOperation, opts *OpenOptions) (*FileDescription, error) {
@@ -494,7 +522,7 @@ func (vfs *VirtualFilesystem) RenameAt(ctx context.Context, creds *auth.Credenti
}
if checkInvariants {
if rp.canHandleError(err) && rp.Done() {
- panic(fmt.Sprintf("%T.RenameAt() consumed all path components and returned %T", rp.mount.fs.impl, err))
+ panic(fmt.Sprintf("%T.RenameAt() consumed all path components and returned %v", rp.mount.fs.impl, err))
}
}
if !rp.handleError(err) {
@@ -527,7 +555,7 @@ func (vfs *VirtualFilesystem) RmdirAt(ctx context.Context, creds *auth.Credentia
}
if checkInvariants {
if rp.canHandleError(err) && rp.Done() {
- panic(fmt.Sprintf("%T.RmdirAt() consumed all path components and returned %T", rp.mount.fs.impl, err))
+ panic(fmt.Sprintf("%T.RmdirAt() consumed all path components and returned %v", rp.mount.fs.impl, err))
}
}
if !rp.handleError(err) {
@@ -608,7 +636,7 @@ func (vfs *VirtualFilesystem) SymlinkAt(ctx context.Context, creds *auth.Credent
}
if checkInvariants {
if rp.canHandleError(err) && rp.Done() {
- panic(fmt.Sprintf("%T.SymlinkAt() consumed all path components and returned %T", rp.mount.fs.impl, err))
+ panic(fmt.Sprintf("%T.SymlinkAt() consumed all path components and returned %v", rp.mount.fs.impl, err))
}
}
if !rp.handleError(err) {
@@ -640,7 +668,7 @@ func (vfs *VirtualFilesystem) UnlinkAt(ctx context.Context, creds *auth.Credenti
}
if checkInvariants {
if rp.canHandleError(err) && rp.Done() {
- panic(fmt.Sprintf("%T.UnlinkAt() consumed all path components and returned %T", rp.mount.fs.impl, err))
+ panic(fmt.Sprintf("%T.UnlinkAt() consumed all path components and returned %v", rp.mount.fs.impl, err))
}
}
if !rp.handleError(err) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 21:32:35 +0000