summaryrefslogtreecommitdiff
path: root/internal/fusefrontend/file2.go
diff options
context:
space:
mode:
Diffstat (limited to 'internal/fusefrontend/file2.go')
-rw-r--r--internal/fusefrontend/file2.go78
1 files changed, 40 insertions, 38 deletions
diff --git a/internal/fusefrontend/file2.go b/internal/fusefrontend/file2.go
index 7fe3d3a..0de325c 100644
--- a/internal/fusefrontend/file2.go
+++ b/internal/fusefrontend/file2.go
@@ -25,6 +25,7 @@ import (
"github.com/rfjakob/gocryptfs/internal/tlog"
)
+// File2 implements the go-fuse v2 API (github.com/hanwen/go-fuse/v2/fs)
type File2 struct {
fd *os.File
// Has Release() already been called on this file? This also means that the
@@ -129,7 +130,7 @@ func (f *File2) createHeader() (fileID []byte, err error) {
//
// Called by Read() for normal reading,
// by Write() and Truncate() via doWrite() for Read-Modify-Write.
-func (f *File2) doRead(dst []byte, off uint64, length uint64) ([]byte, fuse.Status) {
+func (f *File2) doRead(dst []byte, off uint64, length uint64) ([]byte, syscall.Errno) {
// Get the file ID, either from the open file table, or from disk.
var fileID []byte
f.fileTableEntry.IDLock.Lock()
@@ -144,7 +145,7 @@ func (f *File2) doRead(dst []byte, off uint64, length uint64) ([]byte, fuse.Stat
f.fileTableEntry.IDLock.Unlock()
if err == io.EOF {
// Empty file
- return nil, fuse.OK
+ return nil, 0
}
buf := make([]byte, 100)
n, _ := f.fd.ReadAt(buf, 0)
@@ -152,7 +153,7 @@ func (f *File2) doRead(dst []byte, off uint64, length uint64) ([]byte, fuse.Stat
hexdump := hex.EncodeToString(buf)
tlog.Warn.Printf("doRead %d: corrupt header: %v\nFile hexdump (%d bytes): %s",
f.qIno.Ino, err, n, hexdump)
- return nil, fuse.EIO
+ return nil, syscall.EIO
}
// Save into the file table
f.fileTableEntry.ID = fileID
@@ -173,12 +174,12 @@ func (f *File2) doRead(dst []byte, off uint64, length uint64) ([]byte, fuse.Stat
n, err := f.fd.ReadAt(ciphertext, int64(alignedOffset))
if err != nil && err != io.EOF {
tlog.Warn.Printf("read: ReadAt: %s", err.Error())
- return nil, fuse.ToStatus(err)
+ return nil, fs.ToErrno(err)
}
// The ReadAt came back empty. We can skip all the decryption and return early.
if n == 0 {
f.rootNode.contentEnc.CReqPool.Put(ciphertext)
- return dst, fuse.OK
+ return dst, 0
}
// Truncate ciphertext buffer down to actually read bytes
ciphertext = ciphertext[0:n]
@@ -198,7 +199,7 @@ func (f *File2) doRead(dst []byte, off uint64, length uint64) ([]byte, fuse.Stat
} else {
curruptBlockNo := firstBlockNo + f.contentEnc.PlainOffToBlockNo(uint64(len(plaintext)))
tlog.Warn.Printf("doRead %d: corrupt block #%d: %v", f.qIno.Ino, curruptBlockNo, err)
- return nil, fuse.EIO
+ return nil, syscall.EIO
}
}
@@ -216,15 +217,15 @@ func (f *File2) doRead(dst []byte, off uint64, length uint64) ([]byte, fuse.Stat
out = append(dst, out...)
f.rootNode.contentEnc.PReqPool.Put(plaintext)
- return out, fuse.OK
+ return out, 0
}
// Read - FUSE call
-func (f *File2) Read(buf []byte, off int64) (resultData fuse.ReadResult, code fuse.Status) {
+func (f *File2) Read(ctx context.Context, buf []byte, off int64) (resultData fuse.ReadResult, errno syscall.Errno) {
if len(buf) > fuse.MAX_KERNEL_WRITE {
// This would crash us due to our fixed-size buffer pool
tlog.Warn.Printf("Read: rejecting oversized request with EMSGSIZE, len=%d", len(buf))
- return nil, fuse.Status(syscall.EMSGSIZE)
+ return nil, syscall.EMSGSIZE
}
f.fdLock.RLock()
defer f.fdLock.RUnlock()
@@ -236,15 +237,15 @@ func (f *File2) Read(buf []byte, off int64) (resultData fuse.ReadResult, code fu
if f.rootNode.args.SerializeReads {
serialize_reads.Wait(off, len(buf))
}
- out, status := f.doRead(buf[:0], uint64(off), uint64(len(buf)))
+ out, errno := f.doRead(buf[:0], uint64(off), uint64(len(buf)))
if f.rootNode.args.SerializeReads {
serialize_reads.Done()
}
- if status != fuse.OK {
- return nil, status
+ if errno != 0 {
+ return nil, errno
}
- tlog.Debug.Printf("ino%d: Read: status %v, returning %d bytes", f.qIno.Ino, status, len(out))
- return fuse.ReadResultData(out), status
+ tlog.Debug.Printf("ino%d: Read: errno=%d, returning %d bytes", f.qIno.Ino, errno, len(out))
+ return fuse.ReadResultData(out), errno
}
// doWrite - encrypt "data" and write it to plaintext offset "off"
@@ -256,7 +257,7 @@ func (f *File2) Read(buf []byte, off int64) (resultData fuse.ReadResult, code fu
// and by Truncate() to rewrite the last file block.
//
// Empty writes do nothing and are allowed.
-func (f *File2) doWrite(data []byte, off int64) (uint32, fuse.Status) {
+func (f *File2) doWrite(data []byte, off int64) (uint32, syscall.Errno) {
fileWasEmpty := false
// Get the file ID, create a new one if it does not exist yet.
var fileID []byte
@@ -274,7 +275,7 @@ func (f *File2) doWrite(data []byte, off int64) (uint32, fuse.Status) {
fileWasEmpty = true
}
if err != nil {
- return 0, fuse.ToStatus(err)
+ return 0, fs.ToErrno(err)
}
f.fileTableEntry.ID = fileID
}
@@ -287,10 +288,10 @@ func (f *File2) doWrite(data []byte, off int64) (uint32, fuse.Status) {
// Incomplete block -> Read-Modify-Write
if b.IsPartial() {
// Read
- oldData, status := f.doRead(nil, b.BlockPlainOff(), f.contentEnc.PlainBS())
- if status != fuse.OK {
- tlog.Warn.Printf("ino%d fh%d: RMW read failed: %s", f.qIno.Ino, f.intFd(), status.String())
- return 0, status
+ oldData, errno := f.doRead(nil, b.BlockPlainOff(), f.contentEnc.PlainBS())
+ if errno != 0 {
+ tlog.Warn.Printf("ino%d fh%d: RMW read failed: errno=%d", f.qIno.Ino, f.intFd(), errno)
+ return 0, errno
}
// Modify
blockData = f.contentEnc.MergeBlocks(oldData, blockData, int(b.Skip))
@@ -321,7 +322,7 @@ func (f *File2) doWrite(data []byte, off int64) (uint32, fuse.Status) {
tlog.Warn.Printf("ino%d fh%d: doWrite: rollback failed: %v", f.qIno.Ino, f.intFd(), err2)
}
}
- return 0, fuse.ToStatus(err)
+ return 0, fs.ToErrno(err)
}
}
// Write
@@ -331,9 +332,9 @@ func (f *File2) doWrite(data []byte, off int64) (uint32, fuse.Status) {
if err != nil {
tlog.Warn.Printf("ino%d fh%d: doWrite: WriteAt off=%d len=%d failed: %v",
f.qIno.Ino, f.intFd(), cOff, len(ciphertext), err)
- return 0, fuse.ToStatus(err)
+ return 0, fs.ToErrno(err)
}
- return uint32(len(data)), fuse.OK
+ return uint32(len(data)), 0
}
// isConsecutiveWrite returns true if the current write
@@ -349,18 +350,18 @@ func (f *File2) isConsecutiveWrite(off int64) bool {
// Write - FUSE call
//
// If the write creates a hole, pads the file to the next block boundary.
-func (f *File2) Write(data []byte, off int64) (uint32, fuse.Status) {
+func (f *File2) Write(ctx context.Context, data []byte, off int64) (uint32, syscall.Errno) {
if len(data) > fuse.MAX_KERNEL_WRITE {
// This would crash us due to our fixed-size buffer pool
tlog.Warn.Printf("Write: rejecting oversized request with EMSGSIZE, len=%d", len(data))
- return 0, fuse.Status(syscall.EMSGSIZE)
+ return 0, syscall.EMSGSIZE
}
f.fdLock.RLock()
defer f.fdLock.RUnlock()
if f.released {
// The file descriptor has been closed concurrently
tlog.Warn.Printf("ino%d fh%d: Write on released file", f.qIno.Ino, f.intFd())
- return 0, fuse.EBADF
+ return 0, syscall.EBADF
}
f.fileTableEntry.ContentLock.Lock()
defer f.fileTableEntry.ContentLock.Unlock()
@@ -369,21 +370,21 @@ func (f *File2) Write(data []byte, off int64) (uint32, fuse.Status) {
// But if the write directly follows an earlier write, it cannot create a
// hole, and we can save one Stat() call.
if !f.isConsecutiveWrite(off) {
- status := f.writePadHole(off)
- if !status.Ok() {
- return 0, status
+ errno := f.writePadHole(off)
+ if errno != 0 {
+ return 0, errno
}
}
- n, status := f.doWrite(data, off)
- if status.Ok() {
+ n, errno := f.doWrite(data, off)
+ if errno != 0 {
f.lastOpCount = openfiletable.WriteOpCount()
f.lastWrittenOffset = off + int64(len(data)) - 1
}
- return n, status
+ return n, errno
}
// Release - FUSE call, close file
-func (f *File2) Release() {
+func (f *File2) Release(ctx context.Context) syscall.Errno {
f.fdLock.Lock()
if f.released {
log.Panicf("ino%d fh%d: double release", f.qIno.Ino, f.intFd())
@@ -392,10 +393,11 @@ func (f *File2) Release() {
openfiletable.Unregister(f.qIno)
f.fd.Close()
f.fdLock.Unlock()
+ return 0
}
// Flush - FUSE call
-func (f *File2) Flush() fuse.Status {
+func (f *File2) Flush(ctx context.Context) syscall.Errno {
f.fdLock.RLock()
defer f.fdLock.RUnlock()
@@ -405,18 +407,18 @@ func (f *File2) Flush() fuse.Status {
newFd, err := syscall.Dup(f.intFd())
if err != nil {
- return fuse.ToStatus(err)
+ return fs.ToErrno(err)
}
err = syscall.Close(newFd)
- return fuse.ToStatus(err)
+ return fs.ToErrno(err)
}
// Fsync FUSE call
-func (f *File2) Fsync(flags int) (code fuse.Status) {
+func (f *File2) Fsync(ctx context.Context, flags uint32) (errno syscall.Errno) {
f.fdLock.RLock()
defer f.fdLock.RUnlock()
- return fuse.ToStatus(syscall.Fsync(f.intFd()))
+ return fs.ToErrno(syscall.Fsync(f.intFd()))
}
// Getattr FUSE call (like stat)
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-01 17:23:29 +0000