Implemented memFS.ReadDir.
parent
25a95e5074
commit
5bedddbd7d
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@ -113,26 +113,57 @@ func (fs *memFS) Init(
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return
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}
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// Panic if not a live dir.
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//
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// LOCKS_EXCLUDED(fs.mu)
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func (fs *memFS) getDirOrDie(inodeID fuse.InodeID) (d *memDir) {
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fs.mu.RLock()
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defer fs.mu.RUnlock()
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if inodeID >= fuse.InodeID(len(fs.inodes)) {
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panic(fmt.Sprintf("Inode out of range: %v vs. %v", inodeID, len(fs.inodes)))
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}
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var inode *inode = &fs.inodes[inodeID]
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d = inode.impl.(*memDir)
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return
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}
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func (fs *memFS) OpenDir(
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ctx context.Context,
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req *fuse.OpenDirRequest) (resp *fuse.OpenDirResponse, err error) {
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resp = &fuse.OpenDirResponse{}
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fs.mu.RLock()
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defer fs.mu.RUnlock()
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// We don't mutate spontaneosuly, so if the VFS layer has asked for an
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// inode that doesn't exist, something screwed up earlier (a lookup, a
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// cache invalidation, etc.).
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if req.Inode >= fuse.InodeID(len(fs.inodes)) {
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panic(fmt.Sprintf("Inode out of range: %v vs. %v", req.Inode, len(fs.inodes)))
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}
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_ = fs.getDirOrDie(req.Inode)
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return
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}
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func (fs *memFS) ReadDir(
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ctx context.Context,
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req *fuse.ReadDirRequest) (resp *fuse.ReadDirResponse, err error) {
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resp = &fuse.ReadDirResponse{}
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// Grab the directory.
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d := fs.getDirOrDie(req.Inode)
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d.mu.RLock()
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defer d.mu.RUnlock()
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// Return the entries requested.
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for i := int(req.Offset); i < len(d.entries); i++ {
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resp.Data = fuseutil.AppendDirent(resp.Data, d.entries[i])
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// Trim and stop early if we've exceeded the requested size.
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if len(resp.Data) > req.Size {
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resp.Data = resp.Data[:req.Size]
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break
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}
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}
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var inode *inode = &fs.inodes[req.Inode]
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if inode.impl == nil {
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panic(fmt.Sprintf("Dead inode requested: %v", req.Inode))
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}
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// All is good.
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return
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}
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