added lowlevel API and (non yet working) implementation

2 files changed, 150 insertions, 0 deletions

diff --git a/include/fuse_common.h b/include/fuse_common.h
new file mode 100644
index 0000000..cd19435
--- /dev/null
+++ b/include/fuse_common.h
@@ -0,0 +1,49 @@
+/*
+    FUSE: Filesystem in Userspace
+    Copyright (C) 2001-2005  Miklos Szeredi <miklos@szeredi.hu>
+
+    This program can be distributed under the terms of the GNU LGPL.
+    See the file COPYING.LIB.
+*/
+
+#if !defined(_FUSE_H_) && !defined(_FUSE_LOWLEVEL_H_)
+#error "Never include <fuse_common.h> directly; use <fuse.h> or <fuse_lowlevel.h instead."
+#endif
+
+/** Information about open files */
+struct fuse_file_info {
+    /** Open flags.  Available in open() and release() */
+    int flags;
+
+    /** File handle.  May be filled in by filesystem in open().
+        Available in all other file operations */
+    unsigned long fh;
+
+    /** In case of a write operation indicates if this was caused by a
+        writepage */
+    int writepage;
+};
+
+/** Extra context that may be needed by some filesystems
+ *
+ * The uid, gid and pid fields are not filled in case of a writepage
+ * operation.
+ */
+struct fuse_context {
+    /** Pointer to the fuse object */
+    struct fuse *fuse;
+
+    /** User ID of the calling process */
+    uid_t uid;
+
+    /** Group ID of the calling process */
+    gid_t gid;
+
+    /** Thread ID of the calling process */
+    pid_t pid;
+
+    /** Private filesystem data */
+    void *private_data;
+};
+
+
diff --git a/include/fuse_lowlevel.h b/include/fuse_lowlevel.h
new file mode 100644
index 0000000..e90cb84
--- /dev/null
+++ b/include/fuse_lowlevel.h
@@ -0,0 +1,101 @@
+/*
+    FUSE: Filesystem in Userspace
+    Copyright (C) 2001-2005  Miklos Szeredi <miklos@szeredi.hu>
+
+    This program can be distributed under the terms of the GNU LGPL.
+    See the file COPYING.LIB.
+*/
+
+/* ----------------------------------------------------------- *
+ * Low level API                                               *
+ * ----------------------------------------------------------- */
+
+typedef unsigned long fuse_ino_t;
+typedef struct fuse_req *fuse_req_t;
+
+/* 'to_set' flags in setattr */
+#define FUSE_SET_ATTR_MODE	(1 << 0)
+#define FUSE_SET_ATTR_UID	(1 << 1)
+#define FUSE_SET_ATTR_GID	(1 << 2)
+#define FUSE_SET_ATTR_SIZE	(1 << 3)
+#define FUSE_SET_ATTR_ATIME	(1 << 4)
+#define FUSE_SET_ATTR_MTIME	(1 << 5)
+#define FUSE_SET_ATTR_CTIME	(1 << 6)
+
+struct fuse_lowlevel_operations {
+    void (*lookup)  (fuse_req_t req, fuse_ino_t parent, const char *name);
+    void (*forget)  (fuse_req_t req, fuse_ino_t ino);
+    void (*getattr) (fuse_req_t req, fuse_ino_t ino);
+    void (*readlink)(fuse_req_t req, fuse_ino_t ino);
+    void (*mknod)   (fuse_req_t req, fuse_ino_t parent, const char *name,
+                     mode_t mode, dev_t rdev);
+    void (*mkdir)   (fuse_req_t req, fuse_ino_t parent, const char *name,
+                     mode_t mode);
+    void (*unlink)  (fuse_req_t req, fuse_ino_t parent, const char *name);
+    void (*rmdir)   (fuse_req_t req, fuse_ino_t parent, const char *name);
+    void (*symlink) (fuse_req_t req, const char *link, fuse_ino_t parent,
+                     const char *name);
+    void (*rename)  (fuse_req_t req, fuse_ino_t parent, const char *name,
+                     fuse_ino_t newparent, const char *newname);
+    void (*link)    (fuse_req_t req, fuse_ino_t ino, fuse_ino_t newparent,
+                     const char *newname);
+    void (*setattr) (fuse_req_t req, fuse_ino_t ino, struct stat *attr,
+                     int to_set);
+    void (*open)    (fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *f);
+    void (*read)    (fuse_req_t req, fuse_ino_t ino, size_t size, off_t off,
+                     struct fuse_file_info *f);
+    void (*write)   (fuse_req_t req, fuse_ino_t ino, const char *buf,
+                     size_t size, off_t off, struct fuse_file_info *f);
+    void (*flush)   (fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *f);
+    void (*release) (fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *f);
+    void (*fsync)   (fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *f);
+    void (*opendir) (fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *f);
+    void (*readdir)  (fuse_req_t req, fuse_ino_t ino, size_t size, off_t off,
+                     struct fuse_file_info *f);
+    void (*releasedir) (fuse_req_t req, fuse_ino_t ino,
+                        struct fuse_file_info *f);
+    void (*fsyncdir) (fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *f);
+    void (*statfs)  (fuse_req_t req, fuse_ino_t ino);
+    void (*setxattr)(fuse_req_t req, fuse_ino_t ino, const char *name,
+                     const char *value, size_t size, int flags);
+    void (*getxattr)(fuse_req_t req, fuse_ino_t ino, const char *name,
+                     size_t size);
+    void (*listxattr)(fuse_req_t req, fuse_ino_t ino, size_t size);
+    void (*removexattr)(fuse_req_t req, fuse_ino_t ino, const char *name);
+};
+
+/* all except release and forget */
+int fuse_reply_err(fuse_req_t req, int err);
+
+/* forget, unlink, rmdir, rename, setxattr, removexattr, release, releasedir */
+int fuse_reply_ok(fuse_req_t req);
+
+/* lookup, mknod, mkdir, symlink, link */
+int fuse_reply_entry(fuse_req_t req, fuse_ino_t ino, unsigned long generation,
+                     const struct stat *attr, double attr_timeout,
+                     double entry_timeout);
+
+/* getattr, setattr */
+int fuse_reply_attr(fuse_req_t req, int struct stat *attr, double attr_timeout);
+/* readlink */
+int fuse_reply_readlink(fuse_req_t req, const char *link);
+
+/* open, write, flush, fsync, opendir, fsyncdir */
+int fuse_reply_file_info(fuse_req_t req, const struct fuse_file_info *f);
+
+/* read, readdir */
+int fuse_reply_buf(fuse_req_t req, const char *buf, size_t size,
+                    const struct fuse_file_info *f);
+
+/* statfs */
+int fuse_reply_statfs(fuse_req_t req, const struct statfs *statfs);
+
+/* getxattr, listxattr */
+int fuse_reply_xattr(fuse_req_t req, const char *buf, size_t size);
+
+/* return the size of a directory entry */
+size_t fuse_dirent_size(size_t namelen);
+
+/* add a directory entry to the buffer */
+int fuse_add_dirent(char *buf, const char *name, const struct stat *stat,
+                    off_t off);