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feat: essential ioctl and nvme package support
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GPG key ID:
E41C08AD390E7C49
2 changed files with 260 additions and 0 deletions
50
ioctl/hdr_ioctl.go
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50
ioctl/hdr_ioctl.go
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package ioctl
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// Based on `ioctl.h`
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const (
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_IOC_NRBITS = 8
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_IOC_TYPEBITS = 8
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_IOC_SIZEBITS = 14 // OVERRIDE
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_IOC_DIRBITS = 2 // OVERRIDE
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_IOC_NRMASK = (1 << _IOC_NRBITS) - 1
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_IOC_TYPEMASK = (1 << _IOC_TYPEBITS) - 1
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_IOC_SIZEMASK = (1 << _IOC_SIZEBITS) - 1
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_IOC_DIRMASK = (1 << _IOC_DIRBITS) - 1
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_IOC_NRSHIFT = 0
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_IOC_TYPESHIFT = (_IOC_NRSHIFT + _IOC_NRBITS)
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_IOC_SIZESHIFT = (_IOC_TYPESHIFT + _IOC_TYPEBITS)
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_IOC_DIRSHIFT = (_IOC_SIZESHIFT + _IOC_SIZEBITS)
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_IOC_NONE = 0b00 // OVERRIDE
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_IOC_WRITE = 0b01 // OVERRIDE
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_IOC_READ = 0b10 // OVERRIDE
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)
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//go:nosplit
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func IOC(dir, typ, nr, siz int) int {
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return 0 |
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(dir << _IOC_DIRSHIFT) |
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(typ << _IOC_TYPESHIFT) |
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(nr << _IOC_NRSHIFT) |
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(siz << _IOC_SIZESHIFT)
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}
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/*
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IO ops
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*/
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//go:nosplit
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func IO(typ, nr int) int { return IOC(_IOC_NONE, typ, nr, 0) }
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//go:nosplit
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func IOR(typ, nr, siz int) int { return IOC(_IOC_READ, typ, nr, siz) }
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//go:nosplit
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func IOW(typ, nr, siz int) int { return IOC(_IOC_WRITE, typ, nr, siz) }
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//go:nosplit
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func IOWR(typ, nr, siz int) int { return IOC(_IOC_WRITE|_IOC_READ, typ, nr, siz) }
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210
nvme/hdr_nvme.go
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210
nvme/hdr_nvme.go
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package nvme
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import (
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"unsafe"
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"github.com/ii64/gouring/ioctl"
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)
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// Based on `nvme.h` w.r.t. `linux/nvme_ioctl.h`
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const (
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SizeofNvmeAdminCmd = unsafe.Sizeof(NvmeAdminCmd{})
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SizeofNvmeUserIo = unsafe.Sizeof(NvmeUserIo{})
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SizeofNvmePassthruCmd = unsafe.Sizeof(NvmePassthruCmd{})
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SizeofNvmePassthruCmd64 = unsafe.Sizeof(NvmePassthruCmd64{})
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SizeofNvmeUringCmd = unsafe.Sizeof(NvmeUringCmd{})
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SizeofNvmeIdNs = unsafe.Sizeof(NvmeIdNs{})
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SizeofNvmeLbaf = unsafe.Sizeof(NvmeLbaf{})
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NVME_DEFAULT_IOCTL_TIMEOUT = 0
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NVME_IDENTIFY_DATA_SIZE = 0x1000
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NVME_IDENTIFY_CSI_SHIFT = 24
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NVME_IDENTIFY_CNS_NS = 0
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NVME_CSI_NVM = 0
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)
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func _SizeChecker() {
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var x [1]struct{}
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_ = x[SizeofNvmeAdminCmd-72]
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_ = x[SizeofNvmeUserIo-48]
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_ = x[SizeofNvmePassthruCmd-72]
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_ = x[SizeofNvmePassthruCmd64-80]
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_ = x[SizeofNvmeUringCmd-72]
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_ = x[SizeofNvmeLbaf-4]
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_ = x[SizeofNvmeIdNs-0x1000]
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}
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// Can this NVME_URING_CMD_* folds into constant literal?
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var (
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NVME_IOCTL_ID = ioctl.IO('N', 0x40)
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NVME_IOCTL_ADMIN_CMD = ioctl.IOWR('N', 0x41, int(SizeofNvmeAdminCmd))
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NVME_IOCTL_SUBMIT_IO = ioctl.IOW('N', 0x42, int(SizeofNvmeUserIo))
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NVME_IOCTL_IO_CMD = ioctl.IOR('N', 0x43, int(SizeofNvmePassthruCmd))
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NVME_IOCTL_RESET = ioctl.IO('N', 0x44)
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NVME_IOCTL_SUBSYS_RESET = ioctl.IO('N', 0x45)
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NVME_IOCTL_RESCAN = ioctl.IO('N', 0x46)
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NVME_IOCTL_ADMIN64_CMD = ioctl.IOWR('N', 0x47, int(SizeofNvmePassthruCmd64))
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NVME_IOCTL_IO64_CMD = ioctl.IOWR('N', 0x48, int(SizeofNvmePassthruCmd64))
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NVME_IOCTL_IO64_CMD_VEC = ioctl.IOWR('N', 0x49, int(SizeofNvmePassthruCmd64))
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NVME_URING_CMD_IO = ioctl.IOWR('N', 0x80, int(SizeofNvmeUringCmd))
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NVME_URING_CMD_IO_VEC = ioctl.IOWR('N', 0x81, int(SizeofNvmeUringCmd))
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NVME_URING_CMD_ADMIN = ioctl.IOWR('N', 0x82, int(SizeofNvmeUringCmd))
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NVME_URING_CMD_ADMIN_VEC = ioctl.IOWR('N', 0x83, int(SizeofNvmeUringCmd))
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)
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func init() {
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println("dbg NVME_URING_CMD_IO", NVME_URING_CMD_IO)
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println("dbg NVME_URING_CMD_IO_VEC", NVME_URING_CMD_IO_VEC)
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println("dbg NVME_URING_CMD_ADMIN", NVME_URING_CMD_ADMIN)
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println("dbg NVME_URING_CMD_ADMIN_VEC", NVME_URING_CMD_ADMIN_VEC)
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}
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// nvme_admin_opcode
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const (
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NVME_ADMIN_IDENTIFY = 0x06
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)
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// nvme_io_opcode
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const (
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NVME_CMD_WRITE = 0x01
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NVME_CMD_READ = 0x02
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)
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type NvmeAdminCmd = NvmePassthruCmd
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type NvmeUserIo struct {
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Opcode uint8
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Flags uint8
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Control uint16
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Nblocks uint16
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Rsvd uint16
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Metadata uint64
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Addr uint64
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Slba uint64
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Dsmgmt uint32
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Reftag uint32
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Apptag uint16
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Appmask uint16
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_pad [4]byte
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}
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type NvmePassthruCmd struct {
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Opcode uint8
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Flags uint8
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Rsvd1 uint16
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Nsid uint32
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Cdw2,
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Cdw3 uint32
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Metadata uint64
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Addr uint64
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MetadataLen uint32
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DataLen uint32
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Cdw10,
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Cdw11,
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Cdw12,
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Cdw13,
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Cdw14,
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Cdw15 uint32
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TimeoutMs uint32
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Result uint32
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}
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type NvmePassthruCmd64_Union1 uint32
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func (u *NvmePassthruCmd64_Union1) SetDataLen(v uint32) { *u = NvmePassthruCmd64_Union1(v) }
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func (u *NvmePassthruCmd64_Union1) SetVecCount(v uint32) { *u = NvmePassthruCmd64_Union1(v) }
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type NvmePassthruCmd64 struct {
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Opcode uint8
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Flags uint8
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Rsvd1 uint16
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Nsid uint32
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Cdw2,
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Cdw3 uint32
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Metadata uint64
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Addr uint64
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MetadataLen uint32
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// union {
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// __u32 data_len; /* for non-vectored io */
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// __u32 vec_cnt; /* for vectored io */
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// };
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NvmePassthruCmd64_Union1
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Cdw10,
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Cdw11,
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Cdw12,
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Cdw13,
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Cdw14,
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Cdw15 uint32
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TimeoutMs uint32
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Rsvd2 uint32
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Result uint64
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}
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type NvmeUringCmd struct {
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Opcode uint8
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Flags uint8
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Rsvd1 uint16
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Nsid uint32
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Cdw2, Cdw3 uint32
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Metadata uint64
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Addr uint64
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MetadataLen uint32
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DataLen uint32
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Cdw10, Cdw11, Cdw12, Cdw13, Cdw14, Cdw15 uint32
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TimeoutMs uint32
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Rsvd2 uint32
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}
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type NvmeLbaf struct {
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Ms uint16 // bo: Little
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Ds uint8
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Rp uint8
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}
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type NvmeIdNs struct {
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Nsze,
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Ncap,
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Nuse uint64 // bo: Little
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Nsfeat,
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Nlbaf,
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Flbas,
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Mc,
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Dpc,
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Dps,
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Nmic,
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Rescap,
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Fpi,
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Dlfeat uint8
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Nawun,
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Nawupf,
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Nacwu,
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Nabsn,
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Nabo,
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Nabspf,
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Noiob uint16 // bo: Little
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Nvmcap [16]byte
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Npwg,
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Npwa,
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Npdg,
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Npda,
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Nows uint16 // bo: Little
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Msrl uint16 // bo: Little
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Mcl uint32 // bo: Little
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Msrc uint8
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Resvd81 [11]byte
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Anagrpid uint32 // bo: Little
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Rsvd96 [3]byte
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Nsattr uint8
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Nvmsetid uint16 // bo: Little
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Endgid uint16 // bo: Little
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Nguid [16]byte
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Eui64 [8]byte
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Lbaf [16]NvmeLbaf
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Rsvd192 [192]byte
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Vs [3712]byte
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}
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