58 lines
1.6 KiB
Go
58 lines
1.6 KiB
Go
package storage
|
|
|
|
import (
|
|
"math/bits"
|
|
|
|
"github.com/filecoin-project/lotus/lib/sectorbuilder"
|
|
)
|
|
|
|
func fillersFromRem(toFill uint64) ([]uint64, error) {
|
|
// Convert to in-sector bytes for easier math:
|
|
//
|
|
// Sector size to user bytes ratio is constant, e.g. for 1024B we have 1016B
|
|
// of user-usable data.
|
|
//
|
|
// (1024/1016 = 128/127)
|
|
//
|
|
// Given that we can get sector size by simply adding 1/127 of the user
|
|
// bytes
|
|
//
|
|
// (we convert to sector bytes as they are nice round binary numbers)
|
|
|
|
toFill += toFill / 127
|
|
|
|
// We need to fill the sector with pieces that are powers of 2. Conveniently
|
|
// computers store numbers in binary, which means we can look at 1s to get
|
|
// all the piece sizes we need to fill the sector. It also means that number
|
|
// of pieces is the number of 1s in the number of remaining bytes to fill
|
|
out := make([]uint64, bits.OnesCount64(toFill))
|
|
for i := range out {
|
|
// Extract the next lowest non-zero bit
|
|
next := bits.TrailingZeros64(toFill)
|
|
psize := uint64(1) << next
|
|
// e.g: if the number is 0b010100, psize will be 0b000100
|
|
|
|
// set that bit to 0 by XORing it, so the next iteration looks at the
|
|
// next bit
|
|
toFill ^= psize
|
|
|
|
// Add the piece size to the list of pieces we need to create
|
|
out[i] = sectorbuilder.UserBytesForSectorSize(psize)
|
|
}
|
|
return out, nil
|
|
}
|
|
|
|
func (m *Miner) ListSectors() ([]SectorInfo, error) {
|
|
var sectors []SectorInfo
|
|
if err := m.sectors.List(§ors); err != nil {
|
|
return nil, err
|
|
}
|
|
return sectors, nil
|
|
}
|
|
|
|
func (m *Miner) GetSectorInfo(sid uint64) (SectorInfo, error) {
|
|
var out SectorInfo
|
|
err := m.sectors.Get(sid, &out)
|
|
return out, err
|
|
}
|