jbd2: clear BH_Delay & BH_Unwritten in journal_unmap_buffer

[firefly-linux-kernel-4.4.55.git] / fs / udf / inode.c

diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 1d1358ed80c13e5da17849c7773bc8a6d1861e7c..262050f2eb6c4ec5ff33f8b3c0d9038aac2fbbde 100644 (file)
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -145,6 +145,12 @@ const struct address_space_operations udf_aops = {
        .bmap           = udf_bmap,
 };
 
+/*
+ * Expand file stored in ICB to a normal one-block-file
+ *
+ * This function requires i_data_sem for writing and releases it.
+ * This function requires i_mutex held
+ */
 int udf_expand_file_adinicb(struct inode *inode)
 {
        struct page *page;
@@ -163,9 +169,15 @@ int udf_expand_file_adinicb(struct inode *inode)
                        iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
                /* from now on we have normal address_space methods */
                inode->i_data.a_ops = &udf_aops;
+               up_write(&iinfo->i_data_sem);
                mark_inode_dirty(inode);
                return 0;
        }
+       /*
+        * Release i_data_sem so that we can lock a page - page lock ranks
+        * above i_data_sem. i_mutex still protects us against file changes.
+        */
+       up_write(&iinfo->i_data_sem);
 
        page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS);
        if (!page)
@@ -181,6 +193,7 @@ int udf_expand_file_adinicb(struct inode *inode)
                SetPageUptodate(page);
                kunmap(page);
        }
+       down_write(&iinfo->i_data_sem);
        memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00,
               iinfo->i_lenAlloc);
        iinfo->i_lenAlloc = 0;
@@ -190,17 +203,20 @@ int udf_expand_file_adinicb(struct inode *inode)
                iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
        /* from now on we have normal address_space methods */
        inode->i_data.a_ops = &udf_aops;
+       up_write(&iinfo->i_data_sem);
        err = inode->i_data.a_ops->writepage(page, &udf_wbc);
        if (err) {
                /* Restore everything back so that we don't lose data... */
                lock_page(page);
                kaddr = kmap(page);
+               down_write(&iinfo->i_data_sem);
                memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr,
                       inode->i_size);
                kunmap(page);
                unlock_page(page);
                iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
                inode->i_data.a_ops = &udf_adinicb_aops;
+               up_write(&iinfo->i_data_sem);
        }
        page_cache_release(page);
        mark_inode_dirty(inode);
@@ -1105,10 +1121,9 @@ int udf_setsize(struct inode *inode, loff_t newsize)
                        if (bsize <
                            (udf_file_entry_alloc_offset(inode) + newsize)) {
                                err = udf_expand_file_adinicb(inode);
-                               if (err) {
-                                       up_write(&iinfo->i_data_sem);
+                               if (err)
                                        return err;
-                               }
+                               down_write(&iinfo->i_data_sem);
                        } else
                                iinfo->i_lenAlloc = newsize;
                }