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115 lines
3.3 KiB
115 lines
3.3 KiB
package mount
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import (
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"context"
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"fmt"
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"github.com/hanwen/go-fuse/v2/fuse"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
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"math"
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"time"
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)
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const blockSize = 512
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type statsCache struct {
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filer_pb.StatisticsResponse
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lastChecked int64 // unix time in seconds
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}
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func (wfs *WFS) StatFs(cancel <-chan struct{}, in *fuse.InHeader, out *fuse.StatfsOut) (code fuse.Status) {
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// glog.V(4).Infof("reading fs stats")
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if wfs.stats.lastChecked < time.Now().Unix()-20 {
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err := wfs.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
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request := &filer_pb.StatisticsRequest{
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Collection: wfs.option.Collection,
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Replication: wfs.option.Replication,
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Ttl: fmt.Sprintf("%ds", wfs.option.TtlSec),
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DiskType: string(wfs.option.DiskType),
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}
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glog.V(4).Infof("reading filer stats: %+v", request)
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resp, err := client.Statistics(context.Background(), request)
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if err != nil {
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glog.V(0).Infof("reading filer stats %v: %v", request, err)
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return err
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}
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glog.V(4).Infof("read filer stats: %+v", resp)
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wfs.stats.TotalSize = resp.TotalSize
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wfs.stats.UsedSize = resp.UsedSize
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wfs.stats.FileCount = resp.FileCount
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wfs.stats.lastChecked = time.Now().Unix()
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return nil
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})
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if err != nil {
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glog.V(0).Infof("filer Statistics: %v", err)
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return fuse.OK
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}
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}
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totalDiskSize := wfs.stats.TotalSize
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usedDiskSize := wfs.stats.UsedSize
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actualFileCount := wfs.stats.FileCount
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if wfs.option.Quota > 0 && totalDiskSize > uint64(wfs.option.Quota) {
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totalDiskSize = uint64(wfs.option.Quota)
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if usedDiskSize > totalDiskSize {
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totalDiskSize = usedDiskSize
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}
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}
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// http://man.he.net/man2/statfs
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/*
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struct statfs {
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__fsword_t f_type; // Type of filesystem (see below)
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__fsword_t f_bsize; // Optimal transfer block size
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fsblkcnt_t f_blocks; // Total data blocks in filesystem
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fsblkcnt_t f_bfree; // Free blocks in filesystem
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fsblkcnt_t f_bavail; // Free blocks available to
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unprivileged user
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fsfilcnt_t f_files; // Total file nodes in filesystem
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fsfilcnt_t f_ffree; // Free file nodes in filesystem
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fsid_t f_fsid; // Filesystem ID
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__fsword_t f_namelen; // Maximum length of filenames
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__fsword_t f_frsize; // Fragment size (since Linux 2.6)
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__fsword_t f_flags; // Mount flags of filesystem
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(since Linux 2.6.36)
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__fsword_t f_spare[xxx];
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// Padding bytes reserved for future use
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};
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*/
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// Compute the total number of available blocks
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out.Blocks = totalDiskSize / blockSize
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if out.Blocks <= 0 {
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out.Blocks = 1
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}
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// Compute the number of used blocks
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numBlocks := usedDiskSize / blockSize
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remainingBlocks := int64(out.Blocks) - int64(numBlocks)
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if remainingBlocks < 0 {
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remainingBlocks = 0
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}
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// Report the number of free and available blocks for the block size
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out.Bfree = uint64(remainingBlocks)
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out.Bavail = uint64(remainingBlocks)
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out.Bsize = uint32(blockSize)
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// Report the total number of possible files in the file system (and those free)
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out.Files = math.MaxInt64
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out.Ffree = math.MaxInt64 - actualFileCount
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// Report the maximum length of a name and the minimum fragment size
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out.NameLen = 1024
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out.Frsize = uint32(blockSize)
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return fuse.OK
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}
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