Index: include/fuse.h
===================================================================
RCS file: /cvsroot/fuse/fuse/include/fuse.h,v
retrieving revision 1.124
diff -u -r1.124 fuse.h
--- include/fuse.h	22 May 2007 11:09:01 -0000	1.124
+++ include/fuse.h	22 May 2007 18:16:04 -0000
@@ -419,6 +419,8 @@
      * Introduced in version 2.6
      */
     int (*bmap) (const char *, size_t blocksize, uint64_t *idx);
+
+    int (*enter) (const char *);
 };
 
 /** Extra context that may be needed by some filesystems
@@ -653,6 +655,7 @@
                  uint64_t *idx);
 void fuse_fs_init(struct fuse_fs *fs, struct fuse_conn_info *conn);
 void fuse_fs_destroy(struct fuse_fs *fs);
+int fuse_fs_enter(struct fuse_fs *fs, const char *path);
 
 /**
  * Create a new fuse filesystem object
Index: include/fuse_lowlevel.h
===================================================================
RCS file: /cvsroot/fuse/fuse/include/fuse_lowlevel.h,v
retrieving revision 1.45
diff -u -r1.45 fuse_lowlevel.h
--- include/fuse_lowlevel.h	25 Apr 2007 16:19:14 -0000	1.45
+++ include/fuse_lowlevel.h	22 May 2007 18:16:07 -0000
@@ -790,6 +790,8 @@
      */
     void (*bmap) (fuse_req_t req, fuse_ino_t ino, size_t blocksize,
                   uint64_t idx);
+
+    void (*enter) (fuse_req_t req, fuse_ino_t ino);
 };
 
 /**
@@ -960,6 +962,8 @@
  */
 int fuse_reply_bmap(fuse_req_t req, uint64_t idx);
 
+int fuse_reply_enter(fuse_req_t req, int fd);
+
 /* ----------------------------------------------------------- *
  * Filling a buffer in readdir                                 *
  * ----------------------------------------------------------- */
Index: kernel/fuse_kernel.h
===================================================================
RCS file: /cvsroot/fuse/fuse/kernel/fuse_kernel.h,v
retrieving revision 1.39
diff -u -r1.39 fuse_kernel.h
--- kernel/fuse_kernel.h	22 May 2007 11:09:01 -0000	1.39
+++ kernel/fuse_kernel.h	22 May 2007 18:16:08 -0000
@@ -169,6 +169,7 @@
 	FUSE_INTERRUPT     = 36,
 	FUSE_BMAP          = 37,
 	FUSE_DESTROY       = 38,
+	FUSE_ENTER         = 39,
 };
 
 /* The read buffer is required to be at least 8k, but may be much larger */
@@ -349,6 +350,10 @@
 	__u64	block;
 };
 
+struct fuse_enter_out {
+	__u64	fd;
+};
+
 struct fuse_in_header {
 	__u32	len;
 	__u32	opcode;
Index: lib/fuse.c
===================================================================
RCS file: /cvsroot/fuse/fuse/lib/fuse.c,v
retrieving revision 1.199
diff -u -r1.199 fuse.c
--- lib/fuse.c	11 May 2007 09:19:36 -0000	1.199
+++ lib/fuse.c	22 May 2007 18:16:12 -0000
@@ -1097,6 +1097,15 @@
         return -ENOSYS;
 }
 
+int fuse_fs_enter(struct fuse_fs *fs, const char *path)
+{
+    fuse_get_context()->private_data = fs->user_data;
+    if (fs->op.enter)
+        return fs->op.enter(path);
+    else
+        return -ENOSYS;
+}
+
 static int is_open(struct fuse *f, fuse_ino_t dir, const char *name)
 {
     struct node *node;
@@ -2749,6 +2758,31 @@
         reply_err(req, err);
 }
 
+static void fuse_lib_enter(fuse_req_t req, fuse_ino_t ino)
+{
+    struct fuse *f = req_fuse_prepare(req);
+    struct fuse_intr_data d;
+    char *path;
+    int res;
+
+    res = -ENOENT;
+    pthread_rwlock_rdlock(&f->tree_lock);
+    path = get_path(f, ino);
+    if (path != NULL) {
+        fuse_prepare_interrupt(f, req, &d);
+        res = fuse_fs_enter(f->fs, path);
+        fuse_finish_interrupt(f, req, &d);
+        free(path);
+    }
+    pthread_rwlock_unlock(&f->tree_lock);
+    if (res < 0)
+        reply_err(req, res);
+    else {
+        fuse_reply_enter(req, res);
+        close(res);
+    }
+}
+
 static struct fuse_lowlevel_ops fuse_path_ops = {
     .init = fuse_lib_init,
     .destroy = fuse_lib_destroy,
@@ -2784,6 +2818,7 @@
     .getlk = fuse_lib_getlk,
     .setlk = fuse_lib_setlk,
     .bmap = fuse_lib_bmap,
+    .enter = fuse_lib_enter,
 };
 
 static void free_cmd(struct fuse_cmd *cmd)
Index: lib/fuse_lowlevel.c
===================================================================
RCS file: /cvsroot/fuse/fuse/lib/fuse_lowlevel.c,v
retrieving revision 1.62
diff -u -r1.62 fuse_lowlevel.c
--- lib/fuse_lowlevel.c	25 Apr 2007 16:19:15 -0000	1.62
+++ lib/fuse_lowlevel.c	22 May 2007 18:16:15 -0000
@@ -412,6 +412,16 @@
     return send_reply_ok(req, &arg, sizeof(arg));
 }
 
+int fuse_reply_enter(fuse_req_t req, int fd)
+{
+    struct fuse_enter_out arg;
+
+    memset(&arg, 0, sizeof(arg));
+    arg.fd = fd;
+
+    return send_reply_ok(req, &arg, sizeof(arg));
+}
+
 static void do_lookup(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
     char *name = (char *) inarg;
@@ -1016,6 +1026,16 @@
     send_reply_ok(req, NULL, 0);
 }
 
+static void do_enter(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+    (void) inarg;
+
+    if (req->f->op.enter)
+        req->f->op.enter(req, nodeid);
+    else
+        fuse_reply_err(req, ENOSYS);
+}
+
 void *fuse_req_userdata(fuse_req_t req)
 {
     return req->f->userdata;
@@ -1088,6 +1108,7 @@
     [FUSE_INTERRUPT]   = { do_interrupt,   "INTERRUPT"   },
     [FUSE_BMAP]        = { do_bmap,        "BMAP"        },
     [FUSE_DESTROY]     = { do_destroy,     "DESTROY"     },
+    [FUSE_ENTER]       = { do_enter,       "ENTER"   },
 };
 
 #define FUSE_MAXOP (sizeof(fuse_ll_ops) / sizeof(fuse_ll_ops[0]))