diff options
Diffstat (limited to 'pkg')
| -rw-r--r-- | pkg/abi/linux/fuse.go | 27 | ||||
| -rw-r--r-- | pkg/sentry/fsimpl/fuse/fusefs.go | 9 |
2 files changed, 36 insertions, 0 deletions
diff --git a/pkg/abi/linux/fuse.go b/pkg/abi/linux/fuse.go index 97d960096..ea5a7fd43 100644 --- a/pkg/abi/linux/fuse.go +++ b/pkg/abi/linux/fuse.go @@ -456,3 +456,30 @@ func (r *FUSEMknodIn) MarshalUnsafe(buf []byte) { func (r *FUSEMknodIn) SizeBytes() int { return r.MknodMeta.SizeBytes() + len(r.Name) + 1 } + +// FUSESymLinkIn is the request sent by the kernel to the daemon, +// to create a symbolic link. +// +// Dynamically-sized objects cannot be marshalled. +type FUSESymLinkIn struct { + marshal.StubMarshallable + + // Name of symlink to create. + Name string + + // Target of the symlink. + Target string +} + +// MarshalUnsafe serializes r.Name and r.Target to the dst buffer. +// Left null-termination at end of r.Name and r.Target. +func (r *FUSESymLinkIn) MarshalUnsafe(buf []byte) { + copy(buf, r.Name) + copy(buf[len(r.Name)+1:], r.Target) +} + +// SizeBytes is the size of the memory representation of FUSESymLinkIn. +// 2 extra bytes for null-terminated string. +func (r *FUSESymLinkIn) SizeBytes() int { + return len(r.Name) + len(r.Target) + 2 +} diff --git a/pkg/sentry/fsimpl/fuse/fusefs.go b/pkg/sentry/fsimpl/fuse/fusefs.go index 5cef0b94f..0021e2933 100644 --- a/pkg/sentry/fsimpl/fuse/fusefs.go +++ b/pkg/sentry/fsimpl/fuse/fusefs.go @@ -362,6 +362,15 @@ func (i *inode) NewNode(ctx context.Context, name string, opts vfs.MknodOptions) return i.newEntry(ctx, name, opts.Mode.FileType(), linux.FUSE_MKNOD, &in) } +// NewSymlink implements kernfs.Inode.NewSymlink. +func (i *inode) NewSymlink(ctx context.Context, name, target string) (*vfs.Dentry, error) { + in := linux.FUSESymLinkIn{ + Name: name, + Target: target, + } + return i.newEntry(ctx, name, linux.S_IFLNK, linux.FUSE_SYMLINK, &in) +} + // newEntry calls FUSE server for entry creation and allocates corresponding entry according to response. // Shared by FUSE_MKNOD, FUSE_MKDIR, FUSE_SYMLINK, FUSE_LINK and FUSE_LOOKUP. func (i *inode) newEntry(ctx context.Context, name string, fileType linux.FileMode, opcode linux.FUSEOpcode, payload marshal.Marshallable) (*vfs.Dentry, error) { |