Imported linux-2.6.27.39 suse/xen patches.

[people/pmueller/ipfire-2.x.git] / src / patches / suse-2.6.27.31 / patches.fixes / ext4-fix-sub-block-zeroing-for-preallocated-writes

diff --git a/src/patches/suse-2.6.27.31/patches.fixes/ext4-fix-sub-block-zeroing-for-preallocated-writes b/src/patches/suse-2.6.27.31/patches.fixes/ext4-fix-sub-block-zeroing-for-preallocated-writes
deleted file mode 100644 (file)
index e777a45..0000000
--- a/src/patches/suse-2.6.27.31/patches.fixes/ext4-fix-sub-block-zeroing-for-preallocated-writes
+++ /dev/null
@@ -1,54 +0,0 @@
-From: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
-Date: Wed, 13 May 2009 22:36:58 +0000 (-0400)
-Subject: ext4: Fix sub-block zeroing for writes into preallocated extents
-Patch-mainline: 2.6.30
-Git-commit: 9c1ee184a30394e54165fa4c15923cabd952c106
-References: bnc#503161
-
-ext4: Fix sub-block zeroing for writes into preallocated extents
-
-We need to mark the buffer_head mapping preallocated space as new
-during write_begin. Otherwise we don't zero out the page cache content
-properly for a partial write. This will cause file corruption with
-preallocation.
-
-Now that we mark the buffer_head new we also need to have a valid
-buffer_head blocknr so that unmap_underlying_metadata() unmaps the
-correct block.
-
-Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
-Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
-Acked-by: Jeff Mahoney <jeffm@suse.com>
----
-
- fs/ext4/extents.c |    2 ++
- fs/ext4/inode.c   |    7 +++++++
- 2 files changed, 9 insertions(+)
-
---- a/fs/ext4/extents.c
-+++ b/fs/ext4/extents.c
-@@ -2664,6 +2664,8 @@ int ext4_ext_get_blocks(handle_t *handle
-                               if (allocated > max_blocks)
-                                       allocated = max_blocks;
-                               set_buffer_unwritten(bh_result);
-+                              bh_result->b_bdev = inode->i_sb->s_bdev;
-+                              bh_result->b_blocknr = newblock;
-                               goto out2;
-                       }
- 
---- a/fs/ext4/inode.c
-+++ b/fs/ext4/inode.c
-@@ -2220,6 +2220,13 @@ static int ext4_da_get_block_prep(struct
-               set_buffer_delay(bh_result);
-       } else if (ret > 0) {
-               bh_result->b_size = (ret << inode->i_blkbits);
-+              /*
-+               * With sub-block writes into unwritten extents
-+               * we also need to mark the buffer as new so that
-+               * the unwritten parts of the buffer gets correctly zeroed.
-+               */
-+              if (buffer_unwritten(bh_result))
-+                      set_buffer_new(bh_result);
-               ret = 0;
-       }
-