1 files changed, 77 insertions, 19 deletions

diff --git a/fs/ocfs2/extent_map.c b/fs/ocfs2/extent_map.c
index 2baedac58234..f2bb1a04d253 100644
--- a/fs/ocfs2/extent_map.c
+++ b/fs/ocfs2/extent_map.c
@@ -293,7 +293,7 @@ static int ocfs2_last_eb_is_empty(struct inode *inode,
         struct ocfs2_extent_block *eb;
         struct ocfs2_extent_list *el;
 
-        ret = ocfs2_read_block(inode, last_eb_blk, &eb_bh);
+        ret = ocfs2_read_extent_block(inode, last_eb_blk, &eb_bh);
         if (ret) {
                 mlog_errno(ret);
                 goto out;
@@ -302,12 +302,6 @@ static int ocfs2_last_eb_is_empty(struct inode *inode,
         eb = (struct ocfs2_extent_block *) eb_bh->b_data;
         el = &eb->h_list;
 
-        if (!OCFS2_IS_VALID_EXTENT_BLOCK(eb)) {
-                ret = -EROFS;
-                OCFS2_RO_ON_INVALID_EXTENT_BLOCK(inode->i_sb, eb);
-                goto out;
-        }
-
         if (el->l_tree_depth) {
                 ocfs2_error(inode->i_sb,
                             "Inode %lu has non zero tree depth in "
@@ -381,23 +375,16 @@ static int ocfs2_figure_hole_clusters(struct inode *inode,
                 if (le64_to_cpu(eb->h_next_leaf_blk) == 0ULL)
                         goto no_more_extents;
 
-                ret = ocfs2_read_block(inode,
-                                       le64_to_cpu(eb->h_next_leaf_blk),
-                                       &next_eb_bh);
+                ret = ocfs2_read_extent_block(inode,
+                                              le64_to_cpu(eb->h_next_leaf_blk),
+                                              &next_eb_bh);
                 if (ret) {
                         mlog_errno(ret);
                         goto out;
                 }
-                next_eb = (struct ocfs2_extent_block *)next_eb_bh->b_data;
-
-                if (!OCFS2_IS_VALID_EXTENT_BLOCK(next_eb)) {
-                        ret = -EROFS;
-                        OCFS2_RO_ON_INVALID_EXTENT_BLOCK(inode->i_sb, next_eb);
-                        goto out;
-                }
 
+                next_eb = (struct ocfs2_extent_block *)next_eb_bh->b_data;
                 el = &next_eb->h_list;
-
                 i = ocfs2_search_for_hole_index(el, v_cluster);
         }
 
@@ -630,7 +617,7 @@ int ocfs2_get_clusters(struct inode *inode, u32 v_cluster,
         if (ret == 0)
                 goto out;
 
-        ret = ocfs2_read_block(inode, OCFS2_I(inode)->ip_blkno, &di_bh);
+        ret = ocfs2_read_inode_block(inode, &di_bh);
         if (ret) {
                 mlog_errno(ret);
                 goto out;
@@ -819,3 +806,74 @@ out:
 
         return ret;
 }
+
+int ocfs2_read_virt_blocks(struct inode *inode, u64 v_block, int nr,
+                           struct buffer_head *bhs[], int flags,
+                           int (*validate)(struct super_block *sb,
+                                           struct buffer_head *bh))
+{
+        int rc = 0;
+        u64 p_block, p_count;
+        int i, count, done = 0;
+
+        mlog_entry("(inode = %p, v_block = %llu, nr = %d, bhs = %p, "
+                   "flags = %x, validate = %p)\n",
+                   inode, (unsigned long long)v_block, nr, bhs, flags,
+                   validate);
+
+        if (((v_block + nr - 1) << inode->i_sb->s_blocksize_bits) >=
+            i_size_read(inode)) {
+                BUG_ON(!(flags & OCFS2_BH_READAHEAD));
+                goto out;
+        }
+
+        while (done < nr) {
+                down_read(&OCFS2_I(inode)->ip_alloc_sem);
+                rc = ocfs2_extent_map_get_blocks(inode, v_block + done,
+                                                 &p_block, &p_count, NULL);
+                up_read(&OCFS2_I(inode)->ip_alloc_sem);
+                if (rc) {
+                        mlog_errno(rc);
+                        break;
+                }
+
+                if (!p_block) {
+                        rc = -EIO;
+                        mlog(ML_ERROR,
+                             "Inode #%llu contains a hole at offset %llu\n",
+                             (unsigned long long)OCFS2_I(inode)->ip_blkno,
+                             (unsigned long long)(v_block + done) <<
+                             inode->i_sb->s_blocksize_bits);
+                        break;
+                }
+
+                count = nr - done;
+                if (p_count < count)
+                        count = p_count;
+
+                /*
+                 * If the caller passed us bhs, they should have come
+                 * from a previous readahead call to this function.  Thus,
+                 * they should have the right b_blocknr.
+                 */
+                for (i = 0; i < count; i++) {
+                        if (!bhs[done + i])
+                                continue;
+                        BUG_ON(bhs[done + i]->b_blocknr != (p_block + i));
+                }
+
+                rc = ocfs2_read_blocks(inode, p_block, count, bhs + done,
+                                       flags, validate);
+                if (rc) {
+                        mlog_errno(rc);
+                        break;
+                }
+                done += count;
+        }
+
+out:
+        mlog_exit(rc);
+        return rc;
+}
+
+