mirror of
https://github.com/rclone/rclone.git
synced 2024-11-07 17:14:44 +01:00
124 lines
3.5 KiB
Go
124 lines
3.5 KiB
Go
package policy
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"math"
|
|
|
|
"github.com/rclone/rclone/backend/union/upstream"
|
|
"github.com/rclone/rclone/fs"
|
|
)
|
|
|
|
func init() {
|
|
registerPolicy("eplfs", &EpLfs{})
|
|
}
|
|
|
|
// EpLfs stands for existing path, least free space
|
|
// Of all the candidates on which the path exists choose the one with the least free space.
|
|
type EpLfs struct {
|
|
EpAll
|
|
}
|
|
|
|
var errNoUpstreamsFound = errors.New("no upstreams found with more than min_free_space space spare")
|
|
|
|
func (p *EpLfs) lfs(upstreams []*upstream.Fs) (*upstream.Fs, error) {
|
|
var minFreeSpace int64 = math.MaxInt64
|
|
var lfsupstream *upstream.Fs
|
|
for _, u := range upstreams {
|
|
space, err := u.GetFreeSpace()
|
|
if err != nil {
|
|
fs.LogPrintf(fs.LogLevelNotice, nil,
|
|
"Free Space is not supported for upstream %s, treating as infinite", u.Name())
|
|
}
|
|
if space < minFreeSpace && space > int64(u.Opt.MinFreeSpace) {
|
|
minFreeSpace = space
|
|
lfsupstream = u
|
|
}
|
|
}
|
|
if lfsupstream == nil {
|
|
return nil, errNoUpstreamsFound
|
|
}
|
|
return lfsupstream, nil
|
|
}
|
|
|
|
func (p *EpLfs) lfsEntries(entries []upstream.Entry) (upstream.Entry, error) {
|
|
var minFreeSpace int64 = math.MaxInt64
|
|
var lfsEntry upstream.Entry
|
|
for _, e := range entries {
|
|
u := e.UpstreamFs()
|
|
space, err := u.GetFreeSpace()
|
|
if err != nil {
|
|
fs.LogPrintf(fs.LogLevelNotice, nil,
|
|
"Free Space is not supported for upstream %s, treating as infinite", u.Name())
|
|
}
|
|
if space < minFreeSpace && space > int64(u.Opt.MinFreeSpace) {
|
|
minFreeSpace = space
|
|
lfsEntry = e
|
|
}
|
|
}
|
|
if lfsEntry == nil {
|
|
return nil, errNoUpstreamsFound
|
|
}
|
|
return lfsEntry, nil
|
|
}
|
|
|
|
// Action category policy, governing the modification of files and directories
|
|
func (p *EpLfs) Action(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error) {
|
|
upstreams, err := p.EpAll.Action(ctx, upstreams, path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
u, err := p.lfs(upstreams)
|
|
return []*upstream.Fs{u}, err
|
|
}
|
|
|
|
// ActionEntries is ACTION category policy but receiving a set of candidate entries
|
|
func (p *EpLfs) ActionEntries(entries ...upstream.Entry) ([]upstream.Entry, error) {
|
|
entries, err := p.EpAll.ActionEntries(entries...)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
e, err := p.lfsEntries(entries)
|
|
return []upstream.Entry{e}, err
|
|
}
|
|
|
|
// Create category policy, governing the creation of files and directories
|
|
func (p *EpLfs) Create(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error) {
|
|
upstreams, err := p.EpAll.Create(ctx, upstreams, path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
u, err := p.lfs(upstreams)
|
|
return []*upstream.Fs{u}, err
|
|
}
|
|
|
|
// CreateEntries is CREATE category policy but receiving a set of candidate entries
|
|
func (p *EpLfs) CreateEntries(entries ...upstream.Entry) ([]upstream.Entry, error) {
|
|
entries, err := p.EpAll.CreateEntries(entries...)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
e, err := p.lfsEntries(entries)
|
|
return []upstream.Entry{e}, err
|
|
}
|
|
|
|
// Search category policy, governing the access to files and directories
|
|
func (p *EpLfs) Search(ctx context.Context, upstreams []*upstream.Fs, path string) (*upstream.Fs, error) {
|
|
if len(upstreams) == 0 {
|
|
return nil, fs.ErrorObjectNotFound
|
|
}
|
|
upstreams, err := p.epall(ctx, upstreams, path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return p.lfs(upstreams)
|
|
}
|
|
|
|
// SearchEntries is SEARCH category policy but receiving a set of candidate entries
|
|
func (p *EpLfs) SearchEntries(entries ...upstream.Entry) (upstream.Entry, error) {
|
|
if len(entries) == 0 {
|
|
return nil, fs.ErrorObjectNotFound
|
|
}
|
|
return p.lfsEntries(entries)
|
|
}
|