ITWorx Pulse release export
bd774932d5
Public source validation / validate (push) Failing after 3m8s
40 lines
1.1 KiB
Go
40 lines
1.1 KiB
Go
//go:build linux
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package hostcollect
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import "syscall"
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// statFS reads capacity and inode usage for one mount point. statfs(2) is a read-only
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// syscall that needs no capability, which keeps the agent inside cap_drop: [ALL].
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//
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// "Used" follows df: total blocks minus free blocks, so the filesystem's reserved
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// blocks count as used rather than as available headroom the operator does not have.
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func statFS(path string) (FilesystemUsage, error) {
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var stat syscall.Statfs_t
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if err := syscall.Statfs(path, &stat); err != nil {
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return FilesystemUsage{}, err
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}
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blockSize := uint64(stat.Bsize) //nolint:gosec,unconvert // Bsize is int64 on some arches, uint32 on others
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if blockSize == 0 {
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return FilesystemUsage{}, nil
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}
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blocks := stat.Blocks
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free := stat.Bfree
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if free > blocks {
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free = blocks
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}
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usage := FilesystemUsage{
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CapacityBytes: blocks * blockSize,
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UsedBytes: (blocks - free) * blockSize,
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InodesTotal: stat.Files,
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}
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if stat.Files > 0 {
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freeInodes := stat.Ffree
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if freeInodes > stat.Files {
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freeInodes = stat.Files
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}
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usage.InodesUsed = stat.Files - freeInodes
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}
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return usage, nil
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}
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