mirror of
https://github.com/seaweedfs/seaweedfs.git
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133 lines
3.8 KiB
Go
133 lines
3.8 KiB
Go
package mount
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import (
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"context"
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"github.com/chrislusf/seaweedfs/weed/filer"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/mount/meta_cache"
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"github.com/chrislusf/seaweedfs/weed/util"
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"github.com/hanwen/go-fuse/v2/fuse"
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"math"
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"os"
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)
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// Directory handling
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/** Open directory
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*
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* Unless the 'default_permissions' mount option is given,
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* this method should check if opendir is permitted for this
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* directory. Optionally opendir may also return an arbitrary
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* filehandle in the fuse_file_info structure, which will be
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* passed to readdir, releasedir and fsyncdir.
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*/
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func (wfs *WFS) OpenDir(cancel <-chan struct{}, input *fuse.OpenIn, out *fuse.OpenOut) (code fuse.Status) {
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if !wfs.inodeToPath.HasInode(input.NodeId) {
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return fuse.ENOENT
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}
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return fuse.OK
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}
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/** Release directory
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*
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* If the directory has been removed after the call to opendir, the
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* path parameter will be NULL.
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*/
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func (wfs *WFS) ReleaseDir(input *fuse.ReleaseIn) {
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}
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/** Synchronize directory contents
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*
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* If the directory has been removed after the call to opendir, the
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* path parameter will be NULL.
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*
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* If the datasync parameter is non-zero, then only the user data
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* should be flushed, not the meta data
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*/
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func (wfs *WFS) FsyncDir(cancel <-chan struct{}, input *fuse.FsyncIn) (code fuse.Status) {
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return fuse.OK
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}
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/** Read directory
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*
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* The filesystem may choose between two modes of operation:
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*
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* 1) The readdir implementation ignores the offset parameter, and
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* passes zero to the filler function's offset. The filler
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* function will not return '1' (unless an error happens), so the
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* whole directory is read in a single readdir operation.
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*
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* 2) The readdir implementation keeps track of the offsets of the
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* directory entries. It uses the offset parameter and always
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* passes non-zero offset to the filler function. When the buffer
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* is full (or an error happens) the filler function will return
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* '1'.
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*/
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func (wfs *WFS) ReadDir(cancel <-chan struct{}, input *fuse.ReadIn, out *fuse.DirEntryList) (code fuse.Status) {
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return wfs.doReadDirectory(input, out, false)
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}
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func (wfs *WFS) ReadDirPlus(cancel <-chan struct{}, input *fuse.ReadIn, out *fuse.DirEntryList) (code fuse.Status) {
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return wfs.doReadDirectory(input, out, true)
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}
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func (wfs *WFS) doReadDirectory(input *fuse.ReadIn, out *fuse.DirEntryList, isPlusMode bool) fuse.Status {
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dirPath := wfs.inodeToPath.GetPath(input.NodeId)
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var counter uint64
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var dirEntry fuse.DirEntry
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if input.Offset == 0 {
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counter++
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dirEntry.Ino = input.NodeId
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dirEntry.Name = "."
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dirEntry.Mode = toSystemMode(os.ModeDir)
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out.AddDirEntry(dirEntry)
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counter++
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parentDir, _ := dirPath.DirAndName()
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parentInode := wfs.inodeToPath.GetInode(util.FullPath(parentDir))
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dirEntry.Ino = parentInode
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dirEntry.Name = ".."
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dirEntry.Mode = toSystemMode(os.ModeDir)
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out.AddDirEntry(dirEntry)
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}
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processEachEntryFn := func(entry *filer.Entry, isLast bool) bool {
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counter++
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if counter <= input.Offset {
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return true
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}
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dirEntry.Name = entry.Name()
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inode := wfs.inodeToPath.GetInode(dirPath.Child(dirEntry.Name))
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dirEntry.Ino = inode
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dirEntry.Mode = toSystemMode(entry.Mode)
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if !isPlusMode {
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if !out.AddDirEntry(dirEntry) {
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return false
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}
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} else {
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entryOut := out.AddDirLookupEntry(dirEntry)
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if entryOut == nil {
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return false
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}
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wfs.outputFilerEntry(entryOut, inode, entry)
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}
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return true
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}
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if err := meta_cache.EnsureVisited(wfs.metaCache, wfs, dirPath); err != nil {
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glog.Errorf("dir ReadDirAll %s: %v", dirPath, err)
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return fuse.EIO
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}
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listErr := wfs.metaCache.ListDirectoryEntries(context.Background(), dirPath, "", false, int64(math.MaxInt32), func(entry *filer.Entry) bool {
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return processEachEntryFn(entry, false)
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})
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if listErr != nil {
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glog.Errorf("list meta cache: %v", listErr)
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return fuse.EIO
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}
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return fuse.OK
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}
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