1 files changed, 93 insertions, 6 deletions

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 781ba6c4ef85..a62b14eb4065 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -397,6 +397,15 @@ static int ocfs2_truncate_file(struct inode *inode,
         unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1);
         truncate_inode_pages(inode->i_mapping, new_i_size);
 
+        if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
+                status = ocfs2_truncate_inline(inode, di_bh, new_i_size,
+                                               i_size_read(inode), 0);
+                if (status)
+                        mlog_errno(status);
+
+                goto bail_unlock_data;
+        }
+
         /* alright, we're going to need to do a full blown alloc size
          * change. Orphan the inode so that recovery can complete the
          * truncate if necessary. This does the task of marking
@@ -908,7 +917,8 @@ static int ocfs2_extend_file(struct inode *inode,
                              struct buffer_head *di_bh,
                              u64 new_i_size)
 {
-        int ret = 0;
+        int ret = 0, data_locked = 0;
+        struct ocfs2_inode_info *oi = OCFS2_I(inode);
 
         BUG_ON(!di_bh);
 
@@ -920,7 +930,17 @@ static int ocfs2_extend_file(struct inode *inode,
                 goto out;
         BUG_ON(new_i_size < i_size_read(inode));
 
-        if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
+        /*
+         * Fall through for converting inline data, even if the fs
+         * supports sparse files.
+         *
+         * The check for inline data here is legal - nobody can add
+         * the feature since we have i_mutex. We must check it again
+         * after acquiring ip_alloc_sem though, as paths like mmap
+         * might have raced us to converting the inode to extents.
+         */
+        if (!(oi->ip_dyn_features & OCFS2_INLINE_DATA_FL)
+            && ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
                 goto out_update_size;
 
         /* 
@@ -935,6 +955,7 @@ static int ocfs2_extend_file(struct inode *inode,
                 mlog_errno(ret);
                 goto out;
         }
+        data_locked = 1;
 
         /*
          * The alloc sem blocks people in read/write from reading our
@@ -942,9 +963,31 @@ static int ocfs2_extend_file(struct inode *inode,
          * i_mutex to block other extend/truncate calls while we're
          * here.
          */
-        down_write(&OCFS2_I(inode)->ip_alloc_sem);
-        ret = ocfs2_extend_no_holes(inode, new_i_size, new_i_size);
-        up_write(&OCFS2_I(inode)->ip_alloc_sem);
+        down_write(&oi->ip_alloc_sem);
+
+        if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
+                /*
+                 * We can optimize small extends by keeping the inodes
+                 * inline data.
+                 */
+                if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) {
+                        up_write(&oi->ip_alloc_sem);
+                        goto out_update_size;
+                }
+
+                ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
+                if (ret) {
+                        up_write(&oi->ip_alloc_sem);
+
+                        mlog_errno(ret);
+                        goto out_unlock;
+                }
+        }
+
+        if (!ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
+                ret = ocfs2_extend_no_holes(inode, new_i_size, new_i_size);
+
+        up_write(&oi->ip_alloc_sem);
 
         if (ret < 0) {
                 mlog_errno(ret);
@@ -957,7 +1000,7 @@ out_update_size:
                 mlog_errno(ret);
 
 out_unlock:
-        if (!ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
+        if (data_locked)
                 ocfs2_data_unlock(inode, 1);
 
 out:
@@ -1231,6 +1274,31 @@ static int ocfs2_allocate_unwritten_extents(struct inode *inode,
 {
         int ret;
         u32 cpos, phys_cpos, clusters, alloc_size;
+        u64 end = start + len;
+        struct buffer_head *di_bh = NULL;
+
+        if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
+                ret = ocfs2_read_block(OCFS2_SB(inode->i_sb),
+                                       OCFS2_I(inode)->ip_blkno, &di_bh,
+                                       OCFS2_BH_CACHED, inode);
+                if (ret) {
+                        mlog_errno(ret);
+                        goto out;
+                }
+
+                /*
+                 * Nothing to do if the requested reservation range
+                 * fits within the inode.
+                 */
+                if (ocfs2_size_fits_inline_data(di_bh, end))
+                        goto out;
+
+                ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
+                if (ret) {
+                        mlog_errno(ret);
+                        goto out;
+                }
+        }
 
         /*
          * We consider both start and len to be inclusive.
@@ -1276,6 +1344,8 @@ next:
 
         ret = 0;
 out:
+
+        brelse(di_bh);
         return ret;
 }
 
@@ -1457,6 +1527,14 @@ static int ocfs2_remove_inode_range(struct inode *inode,
         if (byte_len == 0)
                 return 0;
 
+        if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
+                ret = ocfs2_truncate_inline(inode, di_bh, byte_start,
+                                            byte_start + byte_len, 1);
+                if (ret)
+                        mlog_errno(ret);
+                return ret;
+        }
+
         trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start);
         trunc_len = (byte_start + byte_len) >> osb->s_clustersize_bits;
         if (trunc_len >= trunc_start)
@@ -1759,6 +1837,15 @@ static int ocfs2_prepare_inode_for_write(struct dentry *dentry,
                         break;
 
                 /*
+                 * There's no sane way to do direct writes to an inode
+                 * with inline data.
+                 */
+                if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
+                        *direct_io = 0;
+                        break;
+                }
+
+                /*
                  * Allowing concurrent direct writes means
                  * i_size changes wouldn't be synchronized, so
                  * one node could wind up truncating another