ocfs2: Rename cleanups

ocfs2_rename() does direct manipulation of the dirent it's gotten back from
a directory search. Wrap this manipulation inside of a function so that we
can transparently change directory update behavior in the future. As an
added bonus, this gets rid of an ugly macro.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Reviewed-by: Joel Becker <joel.becker@oracle.com>

3 files changed, 47 insertions, 31 deletions

diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index 4791683a119c..31db7e3881b1 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -271,6 +271,28 @@ cleanup_and_exit:
         return ret;
 }
 
+int ocfs2_update_entry(struct inode *dir, handle_t *handle,
+                       struct buffer_head *de_bh, struct ocfs2_dir_entry *de,
+                       struct inode *new_entry_inode)
+{
+        int ret;
+
+        ret = ocfs2_journal_access(handle, dir, de_bh,
+                                   OCFS2_JOURNAL_ACCESS_WRITE);
+        if (ret) {
+                mlog_errno(ret);
+                goto out;
+        }
+
+        de->inode = cpu_to_le64(OCFS2_I(new_entry_inode)->ip_blkno);
+        ocfs2_set_de_type(de, new_entry_inode->i_mode);
+
+        ocfs2_journal_dirty(handle, de_bh);
+
+out:
+        return ret;
+}
+
 /*
  * ocfs2_delete_entry deletes a directory entry by merging it with the
  * previous entry
diff --git a/fs/ocfs2/dir.h b/fs/ocfs2/dir.h
index d03eaaa5cfd4..ce48b9080d87 100644
--- a/fs/ocfs2/dir.h
+++ b/fs/ocfs2/dir.h
@@ -50,6 +50,9 @@ static inline int ocfs2_add_entry(handle_t *handle,
                                  dentry->d_name.name, dentry->d_name.len,
                                  inode, blkno, parent_fe_bh, insert_bh);
 }
+int ocfs2_update_entry(struct inode *dir, handle_t *handle,
+                       struct buffer_head *de_bh, struct ocfs2_dir_entry *de,
+                       struct inode *new_entry_inode);
 
 int ocfs2_check_dir_for_entry(struct inode *dir,
                               const char *name,
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index 98aeebc2c9fa..d2f03355d127 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -933,11 +933,6 @@ static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
                 ocfs2_meta_unlock(inode2, 1);
 }
 
-#define PARENT_INO(buffer) \
-        ((struct ocfs2_dir_entry *) \
-         ((char *)buffer + \
-          le16_to_cpu(((struct ocfs2_dir_entry *)buffer)->rec_len)))->inode
-
 static int ocfs2_rename(struct inode *old_dir,
                         struct dentry *old_dentry,
                         struct inode *new_dir,
@@ -959,8 +954,8 @@ static int ocfs2_rename(struct inode *old_dir,
         handle_t *handle = NULL;
         struct buffer_head *old_dir_bh = NULL;
         struct buffer_head *new_dir_bh = NULL;
-        struct ocfs2_dir_entry *old_de = NULL, *new_de = NULL; // dirent for old_dentry
-                                                               // and new_dentry
+        struct ocfs2_dir_entry *old_inode_dot_dot_de = NULL, *old_de = NULL,
+                *new_de = NULL;
         struct buffer_head *new_de_bh = NULL, *old_de_bh = NULL; // bhs for above
         struct buffer_head *old_inode_de_bh = NULL; // if old_dentry is a dir,
                                                     // this is the 1st dirent bh
@@ -1044,19 +1039,26 @@ static int ocfs2_rename(struct inode *old_dir,
         }
 
         if (S_ISDIR(old_inode->i_mode)) {
-                status = -EIO;
-                old_inode_de_bh = ocfs2_bread(old_inode, 0, &status, 0);
-                if (!old_inode_de_bh)
+                u64 old_inode_parent;
+
+                status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
+                                                  old_inode, &old_inode_de_bh,
+                                                  &old_inode_dot_dot_de);
+                if (status) {
+                        status = -EIO;
                         goto bail;
+                }
 
-                status = -EIO;
-                if (le64_to_cpu(PARENT_INO(old_inode_de_bh->b_data)) !=
-                    OCFS2_I(old_dir)->ip_blkno)
+                if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
+                        status = -EIO;
                         goto bail;
-                status = -EMLINK;
-                if (!new_inode && new_dir!=old_dir &&
-                    new_dir->i_nlink >= OCFS2_LINK_MAX)
+                }
+
+                if (!new_inode && new_dir != old_dir &&
+                    new_dir->i_nlink >= OCFS2_LINK_MAX) {
+                        status = -EMLINK;
                         goto bail;
+                }
         }
 
         status = -ENOENT;
@@ -1206,20 +1208,13 @@ static int ocfs2_rename(struct inode *old_dir,
                 }
 
                 /* change the dirent to point to the correct inode */
-                status = ocfs2_journal_access(handle, new_dir, new_de_bh,
-                                              OCFS2_JOURNAL_ACCESS_WRITE);
+                status = ocfs2_update_entry(new_dir, handle, new_de_bh,
+                                            new_de, old_inode);
                 if (status < 0) {
                         mlog_errno(status);
                         goto bail;
                 }
-                new_de->inode = cpu_to_le64(OCFS2_I(old_inode)->ip_blkno);
-                new_de->file_type = old_de->file_type;
                 new_dir->i_version++;
-                status = ocfs2_journal_dirty(handle, new_de_bh);
-                if (status < 0) {
-                        mlog_errno(status);
-                        goto bail;
-                }
 
                 if (S_ISDIR(new_inode->i_mode))
                         newfe->i_links_count = 0;
@@ -1268,12 +1263,8 @@ static int ocfs2_rename(struct inode *old_dir,
         }
         old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
         if (old_inode_de_bh) {
-                status = ocfs2_journal_access(handle, old_inode,
-                                             old_inode_de_bh,
-                                             OCFS2_JOURNAL_ACCESS_WRITE);
-                PARENT_INO(old_inode_de_bh->b_data) =
-                        cpu_to_le64(OCFS2_I(new_dir)->ip_blkno);
-                status = ocfs2_journal_dirty(handle, old_inode_de_bh);
+                status = ocfs2_update_entry(old_inode, handle, old_inode_de_bh,
+                                            old_inode_dot_dot_de, new_dir);
                 old_dir->i_nlink--;
                 if (new_inode) {
                         new_inode->i_nlink--;