libglusterfsclient: Add VMP-based lchown

Signed-off-by: Anand V. Avati <avati@amp.gluster.com>

2 files changed, 96 insertions, 3 deletions

diff --git a/libglusterfsclient/src/libglusterfsclient.c b/libglusterfsclient/src/libglusterfsclient.c
index c36d9b4db..e34474982 100755
--- a/libglusterfsclient/src/libglusterfsclient.c
+++ b/libglusterfsclient/src/libglusterfsclient.c
@@ -4314,14 +4314,19 @@ out:
         return op_ret;
 }
 
+#define LIBGF_DO_CHOWN  1
+#define LIBGF_DO_LCHOWN 2
+
 int
-glusterfs_glh_chown (glusterfs_handle_t handle, const char *path, uid_t owner,
-                        gid_t group)
+__glusterfs_chown (glusterfs_handle_t handle, const char *path, uid_t owner,
+                   gid_t group, int whichop)
 {
         int                             op_ret = -1;
         libglusterfs_client_ctx_t       *ctx = handle;
         loc_t                           loc = {0, };
         char                            *name = NULL;
+        loc_t                           *oploc = NULL;
+        loc_t                           targetloc = {0, };
 
         GF_VALIDATE_OR_GOTO (LIBGF_XL_NAME, ctx, out);
         GF_VALIDATE_ABSOLUTE_PATH_OR_GOTO (LIBGF_XL_NAME, path, out);
@@ -4342,15 +4347,36 @@ glusterfs_glh_chown (glusterfs_handle_t handle, const char *path, uid_t owner,
                 goto out;
         }
 
-        op_ret = libgf_client_chown (ctx, &loc, owner, group);
+        oploc = &loc;
+        if (whichop == LIBGF_DO_LCHOWN)
+                goto do_lchown;
+
+        if (!S_ISLNK (loc.inode->st_mode))
+                goto do_lchown;
+
+        op_ret = libgf_realpath_loc_fill (ctx, (char *)loc.path, &targetloc);
+        if (op_ret == -1)
+                goto out;
+
+        oploc = &targetloc;
+do_lchown:
+        op_ret = libgf_client_chown (ctx, oploc, owner, group);
 out:
         if (name)
                 FREE (name);
         libgf_client_loc_wipe (&loc);
+        libgf_client_loc_wipe (&targetloc);
         return op_ret;
 }
 
 int
+glusterfs_glh_chown (glusterfs_handle_t handle, const char *path, uid_t owner,
+                     gid_t group)
+{
+        return __glusterfs_chown (handle, path, owner, group, LIBGF_DO_CHOWN);
+}
+
+int
 glusterfs_chown (const char *path, uid_t owner, gid_t group)
 {
         struct vmp_entry        *entry = NULL;
@@ -4373,6 +4399,36 @@ out:
         return op_ret;
 }
 
+int
+glusterfs_glh_lchown (glusterfs_handle_t handle, const char *path, uid_t owner,
+                     gid_t group)
+{
+        return __glusterfs_chown (handle, path, owner, group, LIBGF_DO_LCHOWN);
+}
+
+int
+glusterfs_lchown (const char *path, uid_t owner, gid_t group)
+{
+        struct vmp_entry        *entry = NULL;
+        int                     op_ret = -1;
+        char                    *vpath = NULL;
+
+        GF_VALIDATE_OR_GOTO (LIBGF_XL_NAME, path, out);
+
+        entry = libgf_vmp_search_entry ((char *)path);
+        if (!entry) {
+                errno = ENODEV;
+                goto out;
+        }
+
+        vpath = libgf_vmp_virtual_path (entry, path);
+        op_ret = glusterfs_glh_lchown (entry->handle, vpath, owner, group);
+out:
+        if (vpath)
+                free (vpath);
+        return op_ret;
+}
+
 glusterfs_dir_t
 glusterfs_glh_opendir (glusterfs_handle_t handle, const char *path)
 {
diff --git a/libglusterfsclient/src/libglusterfsclient.h b/libglusterfsclient/src/libglusterfsclient.h
index 37fcf04dd..ae0d86a0e 100755
--- a/libglusterfsclient/src/libglusterfsclient.h
+++ b/libglusterfsclient/src/libglusterfsclient.h
@@ -732,6 +732,8 @@ glusterfs_chmod (const char *path, mode_t mode);
 
 
 /* Change the owner of a path.
+ * If @path is a symlink, it is dereferenced and the ownership change
+ * happens on the target.
  *
  * @handle      : Handle of the glusterfs context in which the path
  *              resides.
@@ -749,6 +751,8 @@ glusterfs_glh_chown (glusterfs_handle_t handle, const char *path, uid_t owner,
 
 /* Change the owner of a path.
  *
+ * If @path is a symlink, it is dereferenced and the ownership change
+ * happens on the target.
  * @path        : The path whose owner needs to be changed. Path must
  *              be pre-fixed with the VMP that identifies the
  *              glusterfs context in which the path resides.
@@ -1143,6 +1147,39 @@ glusterfs_glh_remove (glusterfs_handle_t handle, const char *path);
  */
 int
 glusterfs_remove (const char *path);
+
+
+
+/* Change the owner of the given path.
+ *
+ * If @path is a symlink, the ownership change happens on the symlink.
+ *
+ * @handle      : Handle identifying the glusterfs client context.
+ * @path        : Path whose owner needs to be changed.
+ * @owner       : New owner ID
+ * @group       : New Group ID
+ *
+ * Returns 0 on success and -1 on error with errno set appropriately.
+ */
+int
+glusterfs_glh_lchown (glusterfs_handle_t handle, const char *path, uid_t owner,
+                      gid_t group);
+
+
+
+/* Change the owner of the given path.
+ *
+ * If @path is a symlink, the ownership change happens on the symlink.
+ *
+ * @path        : Path whose owner needs to be changed.
+ * @owner       : New owner ID
+ * @group       : New Group ID
+ *
+ * Returns 0 on success and -1 on error with errno set appropriately.
+ */
+
+int
+glusterfs_lchown (const char *path, uid_t owner, gid_t group);
 /* FIXME: review the need for these apis */
 /* added for log related initialization in booster fork implementation */
 void