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This first piece implements filesystem detection. Signed-off-by: Andrey Smirnov <[email protected]>
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| # THIS FILE WAS AUTOMATICALLY GENERATED, PLEASE DO NOT EDIT. | ||
| # | ||
| # Generated on 2024-02-05T11:19:51Z by kres 0e666ea. | ||
| # Generated on 2024-02-09T14:38:27Z by kres latest. | ||
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| * | ||
| !blkid | ||
| !block | ||
| !go.mod | ||
| !go.sum | ||
| !.golangci.yml |
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| @@ -0,0 +1,33 @@ | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
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| // Package blkid provides information about blockdevice filesystem types and IDs. | ||
| package blkid | ||
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| import ( | ||
| "github.com/google/uuid" | ||
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| "github.com/siderolabs/go-blockdevice/v2/block" | ||
| ) | ||
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| // Info represents the result of the probe. | ||
| type Info struct { //nolint:govet | ||
| // Link to the block device, only if the probed file is a blockdevice. | ||
| BlockDevice *block.Device | ||
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| // Overall size of the probed device (in bytes). | ||
| Size uint64 | ||
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| // Optimal I/O size for the device (in bytes). | ||
| IOSize uint64 | ||
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| // TODO: API might be different. | ||
| Name string | ||
| UUID *uuid.UUID | ||
| Label *string | ||
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| BlockSize uint32 | ||
| FilesystemBlockSize uint32 | ||
| FilesystemSize uint64 | ||
| } |
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| @@ -0,0 +1,73 @@ | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
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| //go:build linux | ||
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| package blkid | ||
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| import ( | ||
| "fmt" | ||
| "os" | ||
| "syscall" | ||
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| "golang.org/x/sys/unix" | ||
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| "github.com/siderolabs/go-blockdevice/v2/block" | ||
| ) | ||
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| // ProbePath returns the probe information for the specified path. | ||
| func ProbePath(devpath string) (*Info, error) { | ||
| f, err := os.OpenFile(devpath, os.O_RDONLY|unix.O_CLOEXEC|unix.O_NONBLOCK, 0) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
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| defer f.Close() //nolint:errcheck | ||
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| return Probe(f) | ||
| } | ||
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| // Probe returns the probe information for the specified file. | ||
| func Probe(f *os.File) (*Info, error) { | ||
| unix.Fadvise(int(f.Fd()), 0, 0, unix.FADV_RANDOM) //nolint:errcheck // best-effort: we don't care if this fails | ||
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| st, err := f.Stat() | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to stat: %w", err) | ||
| } | ||
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| info := &Info{} | ||
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| sysStat := st.Sys().(*syscall.Stat_t) //nolint:errcheck,forcetypeassert // we know it's a syscall.Stat_t | ||
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| switch sysStat.Mode & unix.S_IFMT { | ||
| case unix.S_IFBLK: | ||
| // block device, initialize full support | ||
| info.BlockDevice = block.NewFromFile(f) | ||
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| if size, err := info.BlockDevice.GetSize(); err == nil { | ||
| info.Size = size | ||
| } else { | ||
| return nil, fmt.Errorf("failed to get block device size: %w", err) | ||
| } | ||
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| if ioSize, err := info.BlockDevice.GetIOSize(); err == nil { | ||
| info.IOSize = ioSize | ||
| } else { | ||
| return nil, fmt.Errorf("failed to get block device I/O size: %w", err) | ||
| } | ||
| case unix.S_IFREG: | ||
| // regular file (an image?), so use different settings | ||
| info.Size = uint64(st.Size()) | ||
| info.IOSize = block.DefaultBlockSize | ||
| default: | ||
| return nil, fmt.Errorf("unsupported file type: %s", st.Mode().Type()) | ||
| } | ||
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| if err := info.probe(f, 0, info.Size); err != nil { | ||
| return nil, fmt.Errorf("failed to probe: %w", err) | ||
| } | ||
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| return info, nil | ||
| } |
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