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99 lines
3.5 KiB
Protocol Buffer
99 lines
3.5 KiB
Protocol Buffer
syntax = "proto3";
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package proto;
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option go_package = "github.com/containerd/continuity/proto;proto";
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// Manifest specifies the entries in a container bundle, keyed and sorted by
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// path.
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message Manifest {
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repeated Resource resource = 1;
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}
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message Resource {
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// Path specifies the path from the bundle root. If more than one
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// path is present, the entry may represent a hardlink, rather than using
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// a link target. The path format is operating system specific.
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repeated string path = 1;
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// NOTE(stevvooe): Need to define clear precedence for user/group/uid/gid precedence.
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// Uid specifies the user id for the resource.
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int64 uid = 2;
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// Gid specifies the group id for the resource.
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int64 gid = 3;
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// user and group are not currently used but their field numbers have been
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// reserved for future use. As such, they are marked as deprecated.
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string user = 4 [deprecated=true]; // "deprecated" stands for "reserved" here
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string group = 5 [deprecated=true]; // "deprecated" stands for "reserved" here
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// Mode defines the file mode and permissions. We've used the same
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// bit-packing from Go's os package,
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// http://golang.org/pkg/os/#FileMode, since they've done the work of
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// creating a cross-platform layout.
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uint32 mode = 6;
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// NOTE(stevvooe): Beyond here, we start defining type specific fields.
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// Size specifies the size in bytes of the resource. This is only valid
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// for regular files.
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uint64 size = 7;
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// Digest specifies the content digest of the target file. Only valid for
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// regular files. The strings are formatted in OCI style, i.e. <alg>:<encoded>.
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// For detailed information about the format, please refer to OCI Image Spec:
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// https://github.com/opencontainers/image-spec/blob/master/descriptor.md#digests-and-verification
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// The digests are sorted in lexical order and implementations may choose
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// which algorithms they prefer.
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repeated string digest = 8;
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// Target defines the target of a hard or soft link. Absolute links start
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// with a slash and specify the resource relative to the bundle root.
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// Relative links do not start with a slash and are relative to the
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// resource path.
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string target = 9;
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// Major specifies the major device number for character and block devices.
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uint64 major = 10;
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// Minor specifies the minor device number for character and block devices.
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uint64 minor = 11;
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// Xattr provides storage for extended attributes for the target resource.
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repeated XAttr xattr = 12;
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// Ads stores one or more alternate data streams for the target resource.
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repeated ADSEntry ads = 13;
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}
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// XAttr encodes extended attributes for a resource.
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message XAttr {
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// Name specifies the attribute name.
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string name = 1;
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// Data specifies the associated data for the attribute.
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bytes data = 2;
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}
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// ADSEntry encodes information for a Windows Alternate Data Stream.
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message ADSEntry {
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// Name specifices the stream name.
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string name = 1;
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// Data specifies the stream data.
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// See also the description about the digest below.
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bytes data = 2;
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// Digest is a CAS representation of the stream data.
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//
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// At least one of data or digest MUST be specified, and either one of them
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// SHOULD be specified.
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//
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// How to access the actual data using the digest is implementation-specific,
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// and implementations can choose not to implement digest.
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// So, digest SHOULD be used only when the stream data is large.
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string digest = 3;
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}
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