mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-11-23 20:37:12 +01:00
71 lines
1.7 KiB
Go
71 lines
1.7 KiB
Go
package fs
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import (
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"fmt"
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"os"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
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"golang.org/x/sys/unix"
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)
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func mustRemoveDirAtomic(dir string) {
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n := atomicDirRemoveCounter.Add(1)
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tmpDir := fmt.Sprintf("%s.must-remove.%d", dir, n)
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if err := os.Rename(dir, tmpDir); err != nil {
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logger.Panicf("FATAL: cannot move %s to %s: %s", dir, tmpDir, err)
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}
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MustRemoveAll(tmpDir)
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}
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func mmap(fd int, length int) (data []byte, err error) {
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return unix.Mmap(fd, 0, length, unix.PROT_READ, unix.MAP_SHARED)
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}
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func mUnmap(data []byte) error {
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return unix.Munmap(data)
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}
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func mustSyncPath(path string) {
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d, err := os.Open(path)
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if err != nil {
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logger.Panicf("FATAL: cannot open file for fsync: %s", err)
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}
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if err := d.Sync(); err != nil {
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_ = d.Close()
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logger.Panicf("FATAL: cannot flush %q to storage: %s", path, err)
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}
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if err := d.Close(); err != nil {
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logger.Panicf("FATAL: cannot close %q: %s", path, err)
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}
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}
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func createFlockFile(flockFile string) (*os.File, error) {
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flockF, err := os.Create(flockFile)
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if err != nil {
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return nil, fmt.Errorf("cannot create lock file %q: %w", flockFile, err)
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}
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flock := unix.Flock_t{
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Type: unix.F_WRLCK,
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Start: 0,
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Len: 0,
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Whence: 0,
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}
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if err := unix.FcntlFlock(flockF.Fd(), unix.F_SETLK, &flock); err != nil {
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return nil, fmt.Errorf("cannot acquire lock on file %q: %w", flockFile, err)
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}
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return flockF, nil
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}
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func mustGetFreeSpace(path string) uint64 {
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var stat unix.Statvfs_t
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if err := unix.Statvfs(path, &stat); err != nil {
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logger.Panicf("FATAL: cannot determine free disk space on %q: %s", path, err)
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}
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return freeSpace(stat)
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}
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func freeSpace(stat unix.Statvfs_t) uint64 {
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return uint64(stat.Bavail) * uint64(stat.Bsize)
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}
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