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rpc/dataconn + build: support GOOS={solaris,illumos}
This commit is contained in:
Christian Schwarz
parent
080f2c0616
commit
4994b7a9ea
@ -52,7 +52,7 @@ jobs:
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paths:
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- "/usr/include/google/protobuf"
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- run: sudo apt update && sudo apt install python3 python3-pip libgirepository1.0-dev
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- run: sudo apt update && sudo apt install python3 python3-pip libgirepository1.0-dev gawk
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- run: ./lazy.sh devsetup
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- run: make zrepl-bin
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9
Makefile
9
Makefile
@ -93,6 +93,7 @@ clean: docs-clean
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.PHONY: bins-all lint test vet zrepl-bin platformtest-bin
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BINS_ALL_TARGETS := zrepl-bin platformtest-bin vet lint
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GO_SUPPORTS_ILLUMOS := $(shell $(GO) version | gawk -F '.' '/^go version /{split($$0, comps, " "); split(comps[3], v, "."); if (v[1] == "go1" && v[2] >= 13) { print "illumos"; } else { print "noillumos"; }}')
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bins-all:
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$(MAKE) $(BINS_ALL_TARGETS) GOOS=freebsd GOARCH=amd64
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$(MAKE) $(BINS_ALL_TARGETS) GOOS=freebsd GOARCH=386
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@ -100,6 +101,14 @@ bins-all:
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$(MAKE) $(BINS_ALL_TARGETS) GOOS=linux GOARCH=arm64
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$(MAKE) $(BINS_ALL_TARGETS) GOOS=linux GOARCH=386
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$(MAKE) $(BINS_ALL_TARGETS) GOOS=darwin GOARCH=amd64
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$(MAKE) $(BINS_ALL_TARGETS) GOOS=solaris GOARCH=amd64
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ifeq ($(GO_SUPPORTS_ILLUMOS), illumos)
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$(MAKE) $(BINS_ALL_TARGETS) GOOS=illumos GOARCH=amd64
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else ifeq ($(GO_SUPPORTS_ILLUMOS), noillumos)
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@echo "SKIPPING ILLUMOS BUILD BECAUSE GO VERSION DOESN'T SUPPORT IT"
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else
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@echo "CANNOT DETERMINE WHETHER GO VERSION SUPPORTS GOOS=illumos"; exit 1
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endif
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lint:
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$(GO_ENV_VARS) $(GOLANGCI_LINT) run ./...
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@ -14,7 +14,6 @@ import (
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"sync/atomic"
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"syscall"
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"time"
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"unsafe"
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)
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type Wire interface {
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@ -155,25 +154,6 @@ type SyscallConner interface {
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var _ SyscallConner = (*net.TCPConn)(nil)
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func buildIovecs(buffers net.Buffers) (totalLen int64, vecs []syscall.Iovec) {
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vecs = make([]syscall.Iovec, 0, len(buffers))
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for i := range buffers {
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totalLen += int64(len(buffers[i]))
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if len(buffers[i]) == 0 {
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continue
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}
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v := syscall.Iovec{
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Base: &buffers[i][0],
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}
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// syscall.Iovec.Len has platform-dependent size, thus use SetLen
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v.SetLen(len(buffers[i]))
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vecs = append(vecs, v)
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}
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return totalLen, vecs
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}
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// Reads the given buffers full:
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// Think of io.ReadvFull, but for net.Buffers + using the readv syscall.
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//
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@ -184,25 +164,10 @@ func buildIovecs(buffers net.Buffers) (totalLen int64, vecs []syscall.Iovec) {
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// then + io.EOF is returned. This behavior is different to io.ReadFull
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// which returns io.ErrUnexpectedEOF.
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func (c Conn) ReadvFull(buffers net.Buffers) (n int64, err error) {
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totalLen, iovecs := buildIovecs(buffers)
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if debugReadvNoShortReadsAssertEnable {
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defer debugReadvNoShortReadsAssert(totalLen, n, err)
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}
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scc, ok := c.Wire.(SyscallConner)
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if !ok {
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return c.readvFallback(buffers)
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}
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raw, err := scc.SyscallConn()
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if err == SyscallConnNotSupported {
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return c.readvFallback(buffers)
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}
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if err != nil {
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return 0, err
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}
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n, err = c.readv(raw, iovecs)
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return
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return c.readv(buffers)
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}
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// invoked by c.readv if readv system call cannot be used
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func (c Conn) readvFallback(nbuffers net.Buffers) (n int64, err error) {
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buffers := [][]byte(nbuffers)
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for i := range buffers {
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@ -226,91 +191,3 @@ func (c Conn) readvFallback(nbuffers net.Buffers) (n int64, err error) {
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}
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return n, nil
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}
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func (c Conn) readv(rawConn syscall.RawConn, iovecs []syscall.Iovec) (n int64, err error) {
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for len(iovecs) > 0 {
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if err := c.renewReadDeadline(); err != nil {
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return n, err
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}
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oneN, oneErr := c.doOneReadv(rawConn, &iovecs)
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n += oneN
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if netErr, ok := oneErr.(net.Error); ok && netErr.Timeout() && oneN > 0 { // TODO likely not working
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continue
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} else if oneErr == nil && oneN > 0 {
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continue
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} else {
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return n, oneErr
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}
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}
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return n, nil
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}
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func (c Conn) doOneReadv(rawConn syscall.RawConn, iovecs *[]syscall.Iovec) (n int64, err error) {
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rawReadErr := rawConn.Read(func(fd uintptr) (done bool) {
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// iovecs, n and err must not be shadowed!
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// NOTE: unsafe.Pointer safety rules
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// https://tip.golang.org/pkg/unsafe/#Pointer
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//
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// (4) Conversion of a Pointer to a uintptr when calling syscall.Syscall.
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// ...
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// uintptr() conversions must appear within the syscall.Syscall argument list.
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// (even though we are not the escape analysis Likely not )
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thisReadN, _, errno := syscall.Syscall(
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syscall.SYS_READV,
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fd,
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uintptr(unsafe.Pointer(&(*iovecs)[0])),
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uintptr(len(*iovecs)),
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)
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if thisReadN == ^uintptr(0) {
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if errno == syscall.EAGAIN {
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return false
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}
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err = syscall.Errno(errno)
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return true
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}
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if int(thisReadN) < 0 {
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panic("unexpected return value")
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}
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n += int64(thisReadN) // TODO check overflow
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// shift iovecs forward
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for left := int(thisReadN); left > 0; {
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// conversion to uint does not change value, see TestIovecLenFieldIsMachineUint, and left > 0
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thisIovecConsumedCompletely := uint((*iovecs)[0].Len) <= uint(left)
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if thisIovecConsumedCompletely {
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// Update left, cannot go below 0 due to
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// a) definition of thisIovecConsumedCompletely
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// b) left > 0 due to loop invariant
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// Convertion .Len to int64 is thus also safe now, because it is < left < INT_MAX
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left -= int((*iovecs)[0].Len)
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*iovecs = (*iovecs)[1:]
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} else {
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// trim this iovec to remaining length
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// NOTE: unsafe.Pointer safety rules
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// https://tip.golang.org/pkg/unsafe/#Pointer
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// (3) Conversion of a Pointer to a uintptr and back, with arithmetic.
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// ...
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// Note that both conversions must appear in the same expression,
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// with only the intervening arithmetic between them:
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(*iovecs)[0].Base = (*byte)(unsafe.Pointer(uintptr(unsafe.Pointer((*iovecs)[0].Base)) + uintptr(left)))
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curVecNewLength := uint((*iovecs)[0].Len) - uint(left) // casts to uint do not change value
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(*iovecs)[0].SetLen(int(curVecNewLength)) // int and uint have the same size, no change of value
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break // inner
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}
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}
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if thisReadN == 0 {
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err = io.EOF
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return true
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}
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return true
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})
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if rawReadErr != nil {
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err = rawReadErr
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}
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return n, err
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}
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@ -1,19 +0,0 @@
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package timeoutconn
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import (
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"fmt"
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"io"
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)
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const debugReadvNoShortReadsAssertEnable = false
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func debugReadvNoShortReadsAssert(expectedLen, returnedLen int64, returnedErr error) {
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readShort := expectedLen != returnedLen
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if !readShort {
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return
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}
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if returnedErr != io.EOF {
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return
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}
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panic(fmt.Sprintf("ReadvFull short and error is not EOF%v\n", returnedErr))
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}
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11
rpc/dataconn/timeoutconn/timeoutconn_readv_unsupported.go
Normal file
11
rpc/dataconn/timeoutconn/timeoutconn_readv_unsupported.go
Normal file
@ -0,0 +1,11 @@
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// +build illumos solaris
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package timeoutconn
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import "net"
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func (c Conn) readv(buffers net.Buffers) (n int64, err error) {
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// Go does not expose the SYS_READV symbol for Solaris / Illumos - do they have it?
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// Anyhow, use the fallback
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return c.readvFallback(buffers)
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}
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133
rpc/dataconn/timeoutconn/timoutconn_readv.go
Normal file
133
rpc/dataconn/timeoutconn/timoutconn_readv.go
Normal file
@ -0,0 +1,133 @@
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// +build !illumos
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// +build !solaris
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package timeoutconn
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import (
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"io"
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"net"
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"syscall"
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"unsafe"
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)
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func buildIovecs(buffers net.Buffers) (totalLen int64, vecs []syscall.Iovec) {
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vecs = make([]syscall.Iovec, 0, len(buffers))
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for i := range buffers {
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totalLen += int64(len(buffers[i]))
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if len(buffers[i]) == 0 {
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continue
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}
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v := syscall.Iovec{
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Base: &buffers[i][0],
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}
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// syscall.Iovec.Len has platform-dependent size, thus use SetLen
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v.SetLen(len(buffers[i]))
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vecs = append(vecs, v)
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}
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return totalLen, vecs
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}
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func (c Conn) readv(buffers net.Buffers) (n int64, err error) {
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scc, ok := c.Wire.(SyscallConner)
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if !ok {
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return c.readvFallback(buffers)
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}
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rawConn, err := scc.SyscallConn()
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if err == SyscallConnNotSupported {
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return c.readvFallback(buffers)
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}
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if err != nil {
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return 0, err
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}
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_, iovecs := buildIovecs(buffers)
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for len(iovecs) > 0 {
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if err := c.renewReadDeadline(); err != nil {
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return n, err
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}
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oneN, oneErr := c.doOneReadv(rawConn, &iovecs)
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n += oneN
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if netErr, ok := oneErr.(net.Error); ok && netErr.Timeout() && oneN > 0 { // TODO likely not working
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continue
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} else if oneErr == nil && oneN > 0 {
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continue
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} else {
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return n, oneErr
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}
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}
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return n, nil
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}
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func (c Conn) doOneReadv(rawConn syscall.RawConn, iovecs *[]syscall.Iovec) (n int64, err error) {
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rawReadErr := rawConn.Read(func(fd uintptr) (done bool) {
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// iovecs, n and err must not be shadowed!
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// NOTE: unsafe.Pointer safety rules
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// https://tip.golang.org/pkg/unsafe/#Pointer
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//
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// (4) Conversion of a Pointer to a uintptr when calling syscall.Syscall.
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// ...
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// uintptr() conversions must appear within the syscall.Syscall argument list.
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// (even though we are not the escape analysis Likely not )
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thisReadN, _, errno := syscall.Syscall(
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syscall.SYS_READV,
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fd,
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uintptr(unsafe.Pointer(&(*iovecs)[0])),
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uintptr(len(*iovecs)),
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)
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if thisReadN == ^uintptr(0) {
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if errno == syscall.EAGAIN {
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return false
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}
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err = syscall.Errno(errno)
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return true
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}
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if int(thisReadN) < 0 {
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panic("unexpected return value")
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}
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n += int64(thisReadN) // TODO check overflow
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// shift iovecs forward
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for left := int(thisReadN); left > 0; {
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// conversion to uint does not change value, see TestIovecLenFieldIsMachineUint, and left > 0
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thisIovecConsumedCompletely := uint((*iovecs)[0].Len) <= uint(left)
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if thisIovecConsumedCompletely {
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// Update left, cannot go below 0 due to
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// a) definition of thisIovecConsumedCompletely
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// b) left > 0 due to loop invariant
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// Convertion .Len to int64 is thus also safe now, because it is < left < INT_MAX
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left -= int((*iovecs)[0].Len)
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*iovecs = (*iovecs)[1:]
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} else {
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// trim this iovec to remaining length
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// NOTE: unsafe.Pointer safety rules
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// https://tip.golang.org/pkg/unsafe/#Pointer
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// (3) Conversion of a Pointer to a uintptr and back, with arithmetic.
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// ...
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// Note that both conversions must appear in the same expression,
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// with only the intervening arithmetic between them:
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(*iovecs)[0].Base = (*byte)(unsafe.Pointer(uintptr(unsafe.Pointer((*iovecs)[0].Base)) + uintptr(left)))
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curVecNewLength := uint((*iovecs)[0].Len) - uint(left) // casts to uint do not change value
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(*iovecs)[0].SetLen(int(curVecNewLength)) // int and uint have the same size, no change of value
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break // inner
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}
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}
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if thisReadN == 0 {
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err = io.EOF
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return true
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}
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return true
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})
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if rawReadErr != nil {
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err = rawReadErr
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}
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return n, err
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}
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Block a user