From 2ee96eccd49c8f7f722b6dc21b60147a6c4997ec Mon Sep 17 00:00:00 2001
From: Martin Pärtel <martin.partel@gmail.com>
Date: Thu, 5 Apr 2012 12:56:05 +0300
Subject: Made -ouse_ino and -oreaddir_ino the default to mirror inodes.

---
 .gitignore            |  1 +
 ChangeLog             |  5 +++++
 src/bindfs.c          |  4 ++++
 tests/Makefile.am     |  3 +++
 tests/readdir_inode.c | 36 ++++++++++++++++++++++++++++++++++++
 tests/test_bindfs.rb  | 23 +++++++++++++++++++++++
 6 files changed, 72 insertions(+)
 create mode 100644 tests/readdir_inode.c

diff --git a/.gitignore b/.gitignore
index c1cf07c..bb71939 100644
--- a/.gitignore
+++ b/.gitignore
@@ -29,4 +29,5 @@ Makefile
 # Products
 
 src/bindfs
+tests/readdir_inode
 
diff --git a/ChangeLog b/ChangeLog
index 2b9fd33..5137f18 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2012-04-05  Martin Pärtel <martin dot partel at gmail dot com>
+
+	* Made -ouse_ino and -oreaddir_ino the default to
+	  mirror inodes.
+
 2012-03-26  Martin Pärtel <martin dot partel at gmail dot com>
 
 	* Made --map affect chown/chgrp results.
diff --git a/src/bindfs.c b/src/bindfs.c
index 35b1b48..3bda72f 100644
--- a/src/bindfs.c
+++ b/src/bindfs.c
@@ -1501,6 +1501,10 @@ int main(int argc, char *argv[])
     /* We want the kernel to do our access checks for us based on what getattr gives it. */
     fuse_opt_add_arg(&args, "-odefault_permissions");
     
+    /* We want to mirror inodes. */
+    fuse_opt_add_arg(&args, "-ouse_ino");
+    fuse_opt_add_arg(&args, "-oreaddir_ino");
+    
     /* We need to disable the attribute cache whenever two users
        can see different attributes. For now, only mirroring can do that. */
     if (is_mirroring_enabled()) {
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 79b8dee..ce11f95 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -1,2 +1,5 @@
 
+noinst_PROGRAMS = readdir_inode
+readdir_inode_SOURCES = readdir_inode.c
+
 TESTS = test_bindfs.rb
diff --git a/tests/readdir_inode.c b/tests/readdir_inode.c
new file mode 100644
index 0000000..a216c7e
--- /dev/null
+++ b/tests/readdir_inode.c
@@ -0,0 +1,36 @@
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <errno.h>
+
+int main(int argc, char* argv[])
+{
+    DIR* dirp;
+    struct dirent* dent;
+    
+    if (argc != 2) {
+        fprintf(stderr, "Usage: readdir_inode dir\n");
+        return 1;
+    }
+    
+    dirp = opendir(argv[1]);
+    if (dirp == NULL) {
+        perror("failed to open directory");
+        return 2;
+    }
+    
+    dent = readdir(dirp);
+    while (dent != NULL) {
+        if (errno != 0) {
+            perror("failed to read directory entry");
+            return 3;
+        }
+        printf("%llu %s\n", (unsigned long long)dent->d_ino, dent->d_name);
+        dent = readdir(dirp);
+    }
+    
+    closedir(dirp);
+    
+    return 0;
+}
diff --git a/tests/test_bindfs.rb b/tests/test_bindfs.rb
index ef732ff..ff1ee24 100755
--- a/tests/test_bindfs.rb
+++ b/tests/test_bindfs.rb
@@ -41,6 +41,8 @@ $only_these_tests = ARGV unless ARGV.empty?
 $nobody_uid = nobody_uid = Etc.getpwnam('nobody').uid
 $nogroup_gid = nogroup_gid = Etc.getgrnam('nogroup').gid
 
+$tests_dir = File.dirname(File.realpath(__FILE__))
+
 
 testenv("") do
     assert { File.basename(pwd) == TESTDIR_NAME }
@@ -307,3 +309,24 @@ root_testenv("--map=0/1:@0/@1", :title => "--map and chown/chgrp") do
     assert { File.stat('mnt/file1').uid == 1 }
     assert { File.stat('mnt/file1').gid == 1 }
 end
+
+testenv("", :title => "preserves inode numbers") do
+    touch('src/file')
+    mkdir('src/dir')
+    assert { File.stat('mnt/file').ino == File.stat('src/file').ino }
+    assert { File.stat('mnt/dir').ino == File.stat('src/dir').ino }
+end
+
+testenv("", :title => "has readdir inode numbers") do
+    touch('src/file')
+    mkdir('src/dir')
+    
+    inodes = {}
+    for line in `#{$tests_dir}/readdir_inode mnt`.split("\n").reject(&:empty?)
+        inode, name = line.split(" ")
+        inodes[name] = inode.to_i
+    end
+    
+    assert { inodes['file'] == File.stat('src/file').ino }
+    assert { inodes['dir'] == File.stat('src/dir').ino }
+end
-- 
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