go-ceph/cephfs/statx.go

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package cephfs
/*
#cgo LDFLAGS: -lcephfs
#cgo CPPFLAGS: -D_FILE_OFFSET_BITS=64
#include <cephfs/libcephfs.h>
#ifndef AT_STATX_DONT_SYNC
// for versions earlier than Pacific
#define AT_STATX_DONT_SYNC AT_NO_ATTR_SYNC
#endif
*/
import "C"
import (
ts "github.com/ceph/go-ceph/internal/timespec"
)
// Timespec is a public type for the internal C 'struct timespec'
type Timespec ts.Timespec
// StatxMask values contain bit-flags indicating what data should be
// populated by a statx-type call.
type StatxMask uint32
const (
// StatxMode requests the mode value be filled in.
StatxMode = StatxMask(C.CEPH_STATX_MODE)
// StatxNlink requests the nlink value be filled in.
StatxNlink = StatxMask(C.CEPH_STATX_NLINK)
// StatxUid requests the uid value be filled in.
StatxUid = StatxMask(C.CEPH_STATX_UID)
// StatxRdev requests the rdev value be filled in.
StatxRdev = StatxMask(C.CEPH_STATX_RDEV)
// StatxAtime requests the access-time value be filled in.
StatxAtime = StatxMask(C.CEPH_STATX_ATIME)
// StatxMtime requests the modified-time value be filled in.
StatxMtime = StatxMask(C.CEPH_STATX_MTIME)
// StatxIno requests the inode be filled in.
StatxIno = StatxMask(C.CEPH_STATX_INO)
// StatxSize requests the size value be filled in.
StatxSize = StatxMask(C.CEPH_STATX_SIZE)
// StatxBlocks requests the blocks value be filled in.
StatxBlocks = StatxMask(C.CEPH_STATX_BLOCKS)
// StatxBasicStats requests all the fields that are part of a
// traditional stat call.
StatxBasicStats = StatxMask(C.CEPH_STATX_BASIC_STATS)
// StatxBtime requests the birth-time value be filled in.
StatxBtime = StatxMask(C.CEPH_STATX_BTIME)
// StatxVersion requests the version value be filled in.
StatxVersion = StatxMask(C.CEPH_STATX_VERSION)
// StatxAllStats requests all known stat values be filled in.
StatxAllStats = StatxMask(C.CEPH_STATX_ALL_STATS)
)
// AtFlags represent flags to be passed to calls that control how files
// are used or referenced. For example, not following symlinks.
type AtFlags uint
const (
// AtStatxDontSync requests that the stat call only fetch locally-cached
// values if possible, avoiding round trips to a back-end server.
AtStatxDontSync = AtFlags(C.AT_STATX_DONT_SYNC)
// AtNoAttrSync requests that the stat call only fetch locally-cached
// values if possible, avoiding round trips to a back-end server.
//
// Deprecated: replaced by AtStatxDontSync
AtNoAttrSync = AtStatxDontSync
// AtSymlinkNofollow indicates the call should not follow symlinks
// but operate on the symlink itself.
AtSymlinkNofollow = AtFlags(C.AT_SYMLINK_NOFOLLOW)
)
// NOTE: CephStatx fields are meant to be settable by the callers.
// This is the primary reason we use public fields and not accessors
// for the CephStatx type.
// CephStatx instances are returned by extended stat (statx) calls.
// Note that CephStatx results are similar to but not identical
// to (Linux) system statx results.
type CephStatx struct {
// Mask is a bitmask indicating what fields have been set.
Mask StatxMask
// Blksize represents the file system's block size.
Blksize uint32
// Nlink is the number of links for the file.
Nlink uint32
// Uid (user id) value for the file.
Uid uint32
// Gid (group id) value for the file.
Gid uint32
// Mode is the file's type and mode value.
Mode uint16
// Inode value for the file.
Inode Inode
// Size of the file in bytes.
Size uint64
// Blocks indicates the number of blocks allocated to the file.
Blocks uint64
// Dev describes the device containing this file system.
Dev uint64
// Rdev describes the device of this file, if the file is a device.
Rdev uint64
// Atime is the access time of this file.
Atime Timespec
// Ctime is the status change time of this file.
Ctime Timespec
// Mtime is the modification time of this file.
Mtime Timespec
// Btime is the creation (birth) time of this file.
Btime Timespec
// Version value for the file.
Version uint64
}
func cStructToCephStatx(s C.struct_ceph_statx) *CephStatx {
return &CephStatx{
Mask: StatxMask(s.stx_mask),
Blksize: uint32(s.stx_blksize),
Nlink: uint32(s.stx_nlink),
Uid: uint32(s.stx_uid),
Gid: uint32(s.stx_gid),
Mode: uint16(s.stx_mode),
Inode: Inode(s.stx_ino),
Size: uint64(s.stx_size),
Blocks: uint64(s.stx_blocks),
Dev: uint64(s.stx_dev),
Rdev: uint64(s.stx_rdev),
Atime: Timespec(ts.CStructToTimespec(ts.CTimespecPtr(&s.stx_atime))),
Ctime: Timespec(ts.CStructToTimespec(ts.CTimespecPtr(&s.stx_ctime))),
Mtime: Timespec(ts.CStructToTimespec(ts.CTimespecPtr(&s.stx_mtime))),
Btime: Timespec(ts.CStructToTimespec(ts.CTimespecPtr(&s.stx_btime))),
Version: uint64(s.stx_version),
}
}
/* TODO:
- enable later when we can test round -trips
- add time fields
func (c *CephStatx) toCStruct() C.struct_ceph_statx {
var s C.struct_ceph_statx
s.stx_mask = C.uint32_t(c.Mask)
s.stx_blksize = C.uint32_t(c.Blksize)
s.stx_nlink = C.uint32_t(c.Nlink)
s.stx_uid = C.uint32_t(c.Uid)
s.stx_gid = C.uint32_t(c.Gid)
s.stx_mode = C.uint16_t(c.Mode)
s.stx_ino = C.uint64_t(c.Inode)
s.stx_size = C.uint64_t(c.Size)
s.stx_blocks = C.uint64_t(c.Blocks)
s.stx_dev = C.uint64_t(c.Dev)
s.stx_rdev = C.uint64_t(c.Rdev)
s.stx_version = C.uint64_t(c.Version)
return s
}
*/