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package driver
import (
"fmt"
"strconv"
"strings"
"github.com/seaweedfs/seaweedfs/weed/glog"
"github.com/seaweedfs/seaweedfs/weed/util"
)
// Implements Mounter
type seaweedFsMounter struct {
volumeID string
path string
collection string
readOnly bool
driver *SeaweedFsDriver
volContext map[string]string
}
const (
seaweedFsCmd = "weed"
)
func newSeaweedFsMounter(volumeID string, path string, collection string, readOnly bool, driver *SeaweedFsDriver, volContext map[string]string) (Mounter, error) {
return &seaweedFsMounter{
volumeID: volumeID,
path: path,
collection: collection,
readOnly: readOnly,
driver: driver,
volContext: volContext,
}, nil
}
func (seaweedFs *seaweedFsMounter) getOrDefaultContext(key string, defaultValue string) string {
v, ok := seaweedFs.volContext[key]
if ok {
return v
}
return defaultValue
}
func (seaweedFs *seaweedFsMounter) getOrDefaultContextInt(key string, defaultValue int) int {
v := seaweedFs.getOrDefaultContext(key, "")
if v != "" {
iv, err := strconv.Atoi(v)
if err != nil {
return iv
}
}
return defaultValue
}
func (seaweedFs *seaweedFsMounter) Mount(target string) (Unmounter, error) {
glog.V(0).Infof("mounting %v %s to %s", seaweedFs.driver.filers, seaweedFs.path, target)
var filers []string
for _, address := range seaweedFs.driver.filers {
filers = append(filers, string(address))
}
args := []string{
"-logtostderr=true",
"mount",
"-dirAutoCreate=true",
"-umask=000",
fmt.Sprintf("-dir=%s", target),
fmt.Sprintf("-collection=%s", seaweedFs.collection),
fmt.Sprintf("-filer=%s", strings.Join(filers, ",")),
fmt.Sprintf("-filer.path=%s", seaweedFs.path),
fmt.Sprintf("-cacheCapacityMB=%d", seaweedFs.getOrDefaultContextInt("cacheSizeMB", seaweedFs.driver.CacheSizeMB)),
fmt.Sprintf("-localSocket=%s", GetLocalSocket(seaweedFs.volumeID)),
}
// came from https://github.com/seaweedfs/seaweedfs-csi-driver/pull/12
// preferring explicit settings
// keeping this for backward compatibility
for arg, value := range seaweedFs.volContext {
switch arg {
case "map.uid":
args = append(args, fmt.Sprintf("-map.uid=%s", value))
case "map.gid":
args = append(args, fmt.Sprintf("-map.gid=%s", value))
case "replication":
args = append(args, fmt.Sprintf("-replication=%s", value))
case "diskType":
args = append(args, fmt.Sprintf("-disk=%s", value))
case "volumeCapacity":
capacityMB := parseVolumeCapacity(value)
args = append(args, fmt.Sprintf("-collectionQuotaMB=%d", capacityMB))
}
}
if seaweedFs.readOnly {
args = append(args, "-readOnly")
}
if seaweedFs.driver.CacheDir != "" {
args = append(args, fmt.Sprintf("-cacheDir=%s", seaweedFs.driver.CacheDir))
}
if cw := seaweedFs.getOrDefaultContextInt("concurrentWriters", seaweedFs.driver.ConcurrentWriters); cw > 0 {
args = append(args, fmt.Sprintf("-concurrentWriters=%d", cw))
}
if uidMap := seaweedFs.getOrDefaultContext("uidMap", seaweedFs.driver.UidMap); uidMap != "" {
args = append(args, fmt.Sprintf("-map.uid=%s", uidMap))
}
if gidMap := seaweedFs.getOrDefaultContext("gidMap", seaweedFs.driver.GidMap); gidMap != "" {
args = append(args, fmt.Sprintf("-map.gid=%s", gidMap))
}
u, err := fuseMount(target, seaweedFsCmd, args)
if err != nil {
glog.Errorf("mount %v %s to %s: %s", seaweedFs.driver.filers, seaweedFs.path, target, err)
}
return u, err
}
func GetLocalSocket(volumeID string) string {
montDirHash := util.HashToInt32([]byte(volumeID))
if montDirHash < 0 {
montDirHash = -montDirHash
}
socket := fmt.Sprintf("/tmp/seaweedfs-mount-%d.sock", montDirHash)
return socket
}
func parseVolumeCapacity(volumeCapacity string) int64 {
var capacity int64
if vCap, err := strconv.ParseInt(volumeCapacity, 10, 64); err != nil {
glog.Errorf("volumeCapacity %s can not be parsed to Int64, err is: %v", volumeCapacity, err)
} else {
capacity = vCap
}
capacityMB := capacity / 1024 / 1024
return capacityMB
}
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