// OpenFile opens a File, ie. indicates operations are to be done on this file.
//
// Required for fuse.FileSystem.
func (k *KodingNetworkFS) OpenFile(ctx context.Context, op *fuseops.OpenFileOp) error {
file, err := k.getFile(ctx, op.Inode)
if err != nil {
return err
}
file.Open()
handleID := k.setEntryByHandle(file)
op.Handle = handleID
// KeepPageCache tells Kernel to cache this file contents or not. Say an user
// opens a file on their local and then changes that same file on the VM, by
// setting this to be false, the user can close and open the file to see the
// changes. See https://goo.gl/vjhjFY.
op.KeepPageCache = false
return nil
}
func (fs *cachingFS) OpenFile(
ctx context.Context,
op *fuseops.OpenFileOp) (err error) {
fs.mu.Lock()
defer fs.mu.Unlock()
op.KeepPageCache = fs.keepPageCache
return
}
func (fs *Goofys) OpenFile(
ctx context.Context,
op *fuseops.OpenFileOp) (err error) {
fs.mu.Lock()
in := fs.getInodeOrDie(op.Inode)
fs.mu.Unlock()
fh := in.OpenFile(fs)
fs.mu.Lock()
defer fs.mu.Unlock()
handleID := fs.nextHandleID
fs.nextHandleID++
fs.fileHandles[handleID] = fh
op.Handle = handleID
op.KeepPageCache = true
return
}
// LOCKS_EXCLUDED(fs.mu)
func (fs *fileSystem) OpenFile(
ctx context.Context,
op *fuseops.OpenFileOp) (err error) {
fs.mu.Lock()
defer fs.mu.Unlock()
// Find the inode.
in := fs.inodes[op.Inode].(*inode.FileInode)
// Allocate a handle.
handleID := fs.nextHandleID
fs.nextHandleID++
fs.handles[handleID] = handle.NewFileHandle(in, fs.bucket)
op.Handle = handleID
// When we observe object generations that we didn't create, we assign them
// new inode IDs. So for a given inode, all modifications go through the
// kernel. Therefore it's safe to tell the kernel to keep the page cache from
// open to open for a given inode.
op.KeepPageCache = true
return
}