doc

weed/mount/weedfs_unsupported.go

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+package mount
+
+import "github.com/hanwen/go-fuse/fuse"
+
+// https://github.com/libfuse/libfuse/blob/48ae2e72b39b6a31cb2194f6f11786b7ca06aac6/include/fuse.h#L778
+
+/**
+ * Copy a range of data from one file to anotherNiels de Vos, 4 years ago: • libfuse: add copy_file_range() support
+ *
+ * Performs an optimized copy between two file descriptors without the
+ * additional cost of transferring data through the FUSE kernel module
+ * to user space (glibc) and then back into the FUSE filesystem again.
+ *
+ * In case this method is not implemented, applications are expected to
+ * fall back to a regular file copy.   (Some glibc versions did this
+ * emulation automatically, but the emulation has been removed from all
+ * glibc release branches.)
+ */
+func (wfs *WFS) CopyFileRange(cancel <-chan struct{}, in *fuse.CopyFileRangeIn) (written uint32, code fuse.Status) {
+	return 0, fuse.ENOSYS
+}
+
+/**
+ * Allocates space for an open file
+ *
+ * This function ensures that required space is allocated for specified
+ * file.  If this function returns success then any subsequent write
+ * request to specified range is guaranteed not to fail because of lack
+ * of space on the file system media.
+ */
+func (wfs *WFS) Fallocate(cancel <-chan struct{}, in *fuse.FallocateIn) (code fuse.Status) {
+	return fuse.ENOSYS
+}
+
+/**
+ * Find next data or hole after the specified offset
+ */
+func (wfs *WFS) Lseek(cancel <-chan struct{}, in *fuse.LseekIn, out *fuse.LseekOut) fuse.Status {
+	return fuse.ENOSYS
+}
+
+func (wfs *WFS) GetLk(cancel <-chan struct{}, in *fuse.LkIn, out *fuse.LkOut) (code fuse.Status) {
+	return fuse.ENOSYS
+}
+
+func (wfs *WFS) SetLk(cancel <-chan struct{}, in *fuse.LkIn) (code fuse.Status) {
+	return fuse.ENOSYS
+}
+
+func (wfs *WFS) SetLkw(cancel <-chan struct{}, in *fuse.LkIn) (code fuse.Status) {
+	return fuse.ENOSYS
+}
+
+/**
+ * Check file access permissions
+ *
+ * This will be called for the access() system call.  If the
+ * 'default_permissions' mount option is given, this method is not
+ * called.
+ *
+ * This method is not called under Linux kernel versions 2.4.x
+ */
+func (wfs *WFS) Access(cancel <-chan struct{}, input *fuse.AccessIn) (code fuse.Status) {
+	return fuse.ENOSYS
+}