Merge branch 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux...

[safe/jmp/linux-2.6] / fs / ocfs2 / aops.c

diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index fdad075..deb2b13 100644 (file)
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -44,6 +44,7 @@
 #include "suballoc.h"
 #include "super.h"
 #include "symlink.h"
+#include "refcounttree.h"
 
 #include "buffer_head_io.h"
 
@@ -590,6 +591,8 @@ static int ocfs2_direct_IO_get_blocks(struct inode *inode, sector_t iblock,
                goto bail;
        }
 
+       /* We should already CoW the refcounted extent. */
+       BUG_ON(ext_flags & OCFS2_EXT_REFCOUNTED);
        /*
         * get_more_blocks() expects us to describe a hole by clearing
         * the mapped bit on bh_result().
@@ -687,6 +690,10 @@ static ssize_t ocfs2_direct_IO(int rw,
        if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
                return 0;
 
+       /* Fallback to buffered I/O if we are appending. */
+       if (i_size_read(inode) <= offset)
+               return 0;
+
        ret = blockdev_direct_IO_no_locking(rw, iocb, inode,
                                            inode->i_sb->s_bdev, iov, offset,
                                            nr_segs, 
@@ -1449,6 +1456,9 @@ static int ocfs2_populate_write_desc(struct inode *inode,
                                goto out;
                        }
 
+                       /* We should already CoW the refcountd extent. */
+                       BUG_ON(ext_flags & OCFS2_EXT_REFCOUNTED);
+
                        /*
                         * Assume worst case - that we're writing in
                         * the middle of the extent.
@@ -1700,6 +1710,19 @@ int ocfs2_write_begin_nolock(struct address_space *mapping,
                goto out;
        }
 
+       ret = ocfs2_check_range_for_refcount(inode, pos, len);
+       if (ret < 0) {
+               mlog_errno(ret);
+               goto out;
+       } else if (ret == 1) {
+               ret = ocfs2_refcount_cow(inode, di_bh,
+                                        wc->w_cpos, wc->w_clen, UINT_MAX);
+               if (ret) {
+                       mlog_errno(ret);
+                       goto out;
+               }
+       }
+
        ret = ocfs2_populate_write_desc(inode, wc, &clusters_to_alloc,
                                        &extents_to_split);
        if (ret) {
@@ -1999,4 +2022,5 @@ const struct address_space_operations ocfs2_aops = {
        .releasepage            = ocfs2_releasepage,
        .migratepage            = buffer_migrate_page,
        .is_partially_uptodate  = block_is_partially_uptodate,
+       .error_remove_page      = generic_error_remove_page,
 };