1 files changed, 49 insertions, 22 deletions

diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index aa233469b3c1..df88b957ccf0 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -95,11 +95,33 @@ void udf_evict_inode(struct inode *inode)
         }
 }
 
+static void udf_write_failed(struct address_space *mapping, loff_t to)
+{
+        struct inode *inode = mapping->host;
+        struct udf_inode_info *iinfo = UDF_I(inode);
+        loff_t isize = inode->i_size;
+
+        if (to > isize) {
+                truncate_pagecache(inode, to, isize);
+                if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
+                        down_write(&iinfo->i_data_sem);
+                        udf_truncate_extents(inode);
+                        up_write(&iinfo->i_data_sem);
+                }
+        }
+}
+
 static int udf_writepage(struct page *page, struct writeback_control *wbc)
 {
         return block_write_full_page(page, udf_get_block, wbc);
 }
 
+static int udf_writepages(struct address_space *mapping,
+                        struct writeback_control *wbc)
+{
+        return mpage_writepages(mapping, wbc, udf_get_block);
+}
+
 static int udf_readpage(struct file *file, struct page *page)
 {
         return mpage_readpage(page, udf_get_block);
@@ -118,21 +140,24 @@ static int udf_write_begin(struct file *file, struct address_space *mapping,
         int ret;
 
         ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block);
-        if (unlikely(ret)) {
-                struct inode *inode = mapping->host;
-                struct udf_inode_info *iinfo = UDF_I(inode);
-                loff_t isize = inode->i_size;
-
-                if (pos + len > isize) {
-                        truncate_pagecache(inode, pos + len, isize);
-                        if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
-                                down_write(&iinfo->i_data_sem);
-                                udf_truncate_extents(inode);
-                                up_write(&iinfo->i_data_sem);
-                        }
-                }
-        }
+        if (unlikely(ret))
+                udf_write_failed(mapping, pos + len);
+        return ret;
+}
 
+static ssize_t udf_direct_IO(int rw, struct kiocb *iocb,
+                             const struct iovec *iov,
+                             loff_t offset, unsigned long nr_segs)
+{
+        struct file *file = iocb->ki_filp;
+        struct address_space *mapping = file->f_mapping;
+        struct inode *inode = mapping->host;
+        ssize_t ret;
+
+        ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
+                                  udf_get_block);
+        if (unlikely(ret < 0 && (rw & WRITE)))
+                udf_write_failed(mapping, offset + iov_length(iov, nr_segs));
         return ret;
 }
 
@@ -145,8 +170,10 @@ const struct address_space_operations udf_aops = {
         .readpage       = udf_readpage,
         .readpages      = udf_readpages,
         .writepage      = udf_writepage,
-        .write_begin            = udf_write_begin,
-        .write_end              = generic_write_end,
+        .writepages     = udf_writepages,
+        .write_begin    = udf_write_begin,
+        .write_end      = generic_write_end,
+        .direct_IO      = udf_direct_IO,
         .bmap           = udf_bmap,
 };
 
@@ -1312,14 +1339,14 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
         }
 
         read_lock(&sbi->s_cred_lock);
-        inode->i_uid = le32_to_cpu(fe->uid);
-        if (inode->i_uid == -1 ||
+        i_uid_write(inode, le32_to_cpu(fe->uid));
+        if (!uid_valid(inode->i_uid) ||
             UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) ||
             UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET))
                 inode->i_uid = UDF_SB(inode->i_sb)->s_uid;
 
-        inode->i_gid = le32_to_cpu(fe->gid);
-        if (inode->i_gid == -1 ||
+        i_gid_write(inode, le32_to_cpu(fe->gid));
+        if (!gid_valid(inode->i_gid) ||
             UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) ||
             UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET))
                 inode->i_gid = UDF_SB(inode->i_sb)->s_gid;
@@ -1542,12 +1569,12 @@ static int udf_update_inode(struct inode *inode, int do_sync)
         if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
                 fe->uid = cpu_to_le32(-1);
         else
-                fe->uid = cpu_to_le32(inode->i_uid);
+                fe->uid = cpu_to_le32(i_uid_read(inode));
 
         if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET))
                 fe->gid = cpu_to_le32(-1);
         else
-                fe->gid = cpu_to_le32(inode->i_gid);
+                fe->gid = cpu_to_le32(i_gid_read(inode));
 
         udfperms = ((inode->i_mode & S_IRWXO)) |
                    ((inode->i_mode & S_IRWXG) << 2) |