diff options
| author | Jamie Liu <jamieliu@google.com> | 2019-12-30 11:35:06 -0800 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2019-12-30 11:36:41 -0800 |
| commit | 1f384ac42b9ee8b52000dc2bff79d975853519ed (patch) | |
| tree | 64d0bed36c4b8fa3005b13463d2995fc0a2eeb37 /pkg/sentry/vfs/filesystem.go | |
| parent | 796f53c0befc21570b185811e26b74e71950dfc3 (diff) | |
Add VFS2 support for device special files.
- Add FileDescriptionOptions.UseDentryMetadata, which reduces the amount of
boilerplate needed for device FDs and the like between filesystems.
- Switch back to having FileDescription.Init() take references on the Mount and
Dentry; otherwise managing refcounts around failed calls to
OpenDeviceSpecialFile() / Device.Open() is tricky.
PiperOrigin-RevId: 287575574
Diffstat (limited to 'pkg/sentry/vfs/filesystem.go')
| -rw-r--r-- | pkg/sentry/vfs/filesystem.go | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/pkg/sentry/vfs/filesystem.go b/pkg/sentry/vfs/filesystem.go index 89bd58864..ea78f555b 100644 --- a/pkg/sentry/vfs/filesystem.go +++ b/pkg/sentry/vfs/filesystem.go @@ -418,17 +418,38 @@ type FilesystemImpl interface { UnlinkAt(ctx context.Context, rp *ResolvingPath) error // ListxattrAt returns all extended attribute names for the file at rp. + // + // Errors: + // + // - If extended attributes are not supported by the filesystem, + // ListxattrAt returns nil. (See FileDescription.Listxattr for an + // explanation.) ListxattrAt(ctx context.Context, rp *ResolvingPath) ([]string, error) // GetxattrAt returns the value associated with the given extended // attribute for the file at rp. + // + // Errors: + // + // - If extended attributes are not supported by the filesystem, GetxattrAt + // returns ENOTSUP. GetxattrAt(ctx context.Context, rp *ResolvingPath, name string) (string, error) // SetxattrAt changes the value associated with the given extended // attribute for the file at rp. + // + // Errors: + // + // - If extended attributes are not supported by the filesystem, SetxattrAt + // returns ENOTSUP. SetxattrAt(ctx context.Context, rp *ResolvingPath, opts SetxattrOptions) error // RemovexattrAt removes the given extended attribute from the file at rp. + // + // Errors: + // + // - If extended attributes are not supported by the filesystem, + // RemovexattrAt returns ENOTSUP. RemovexattrAt(ctx context.Context, rp *ResolvingPath, name string) error // PrependPath prepends a path from vd to vd.Mount().Root() to b. |