kernel.git/fs/ext4/migrate.c, branch linux-2.6.28.y

ext4: Fix NULL dereference in ext4_ext_migrate()'s error handling

2009-03-17T00:32:42Z

(cherry picked from commit 090542641de833c6f756895fc2f139f046e298f9) This was found through a code checker (http://repo.or.cz/w/smatch.git/). It looks like you might be able to trigger the error by trying to migrate a readonly file system. Signed-off-by: Dan Carpenter Signed-off-by: "Theodore Ts'o" Signed-off-by: Greg Kroah-Hartman

ext4: elevate write count for migrate ioctl

2008-09-13T16:52:26Z

The migrate ioctl writes to the filsystem, so we need to elevate the write count. Signed-off-by: Aneesh Kumar K.V Signed-off-by: "Theodore Ts'o"

ext4: journal credits reservation fixes for extent file writepage

2008-08-20T02:16:05Z

This patch modified the writepage/write_begin credit calculation for extent files, to use the credits caculation helper function. The current calculation of how many index/leaf blocks should be accounted is too conservetive, it always considered the worse case, where the tree level is 5, and in the case of multiple chunk allocations, it always assumed no blocks were dirtied in common across the allocations. This path uses the accurate depth of the inode with some extras to calculate the index blocks, and also less conservative in the case of multiple allocation accounting. Signed-off-by: Mingming Cao Reviewed-by: Aneesh Kumar K.V Signed-off-by: "Theodore Ts'o"

ext4: move headers out of include/linux

2008-04-29T22:13:32Z

Move ext4 headers out of include/linux. This is just the trivial move, there's some more thing that could be done later. Signed-off-by: Christoph Hellwig Signed-off-by: Mingming Cao Signed-off-by: "Theodore Ts'o"

ext4: Fix race between migration and mmap write

2008-04-29T12:11:12Z

Fail migrate if we allocated new blocks via mmap write. If we write to holes in the file via mmap, we end up allocating new blocks. This block allocation happens without taking inode->i_mutex. Since migrate is protected by i_mutex and migrate expects that no new blocks get allocated during migrate, fail migrate if new blocks get allocated. We can't take inode->i_mutex in the mmap write path because that would result in a locking order violation between i_mutex and mmap_sem. Also adding a separate rw_sempahore for protection is really high overhead for a rare operation such as migrate. Signed-off-by: Aneesh Kumar K.V Acked-by: Jan Kara Signed-off-by: "Theodore Ts'o"

ext4: Fix memory and buffer head leak in callers to ext4_ext_find_extent()

2008-02-25T21:54:37Z

The path variable returned via ext4_ext_find_extent is a kmalloc variable and needs to be freeded. It also contains a reference to buffer_head which needs to be dropped. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Mingming Cao Signed-off-by: "Theodore Ts'o"

ext4: Fix circular locking dependency with migrate and rm.

2008-02-10T06:20:05Z

In order to prevent a circular locking dependency when an unlink operation is racing with an ext4 migration, we delay taking i_data_sem until just before switch the inode format, and use i_mutex to prevent writes and truncates during the first part of the migration operation. Acked-by: Jan Kara Signed-off-by: Aneesh Kumar K.V Signed-off-by: Mingming Cao Signed-off-by: "Theodore Ts'o"

ext4: Don't set EXTENTS_FL flag for fast symlinks

2008-02-05T15:56:37Z

For fast symbolic links, the file content is stored in the i_block[] array, which is not compatible with the new file extents format. e2fsck reports error on such files because EXTENTS_FL is set. Don't set the EXTENTS_FL flag when creating fast symlinks. In the case of file migration, skip fast symbolic links. Signed-off-by: Valerie Clement Signed-off-by: Mingming Cao Signed-off-by: "Theodore Ts'o"

ext4: Add multi block allocator for ext4

2008-01-29T05:19:52Z

Signed-off-by: Alex Tomas Signed-off-by: Andreas Dilger Signed-off-by: Aneesh Kumar K.V Signed-off-by: Eric Sandeen Signed-off-by: "Theodore Ts'o"

ext4: Add EXT4_IOC_MIGRATE ioctl

2008-01-29T04:58:26Z

The below patch add ioctl for migrating ext3 indirect block mapped inode to ext4 extent mapped inode. Signed-off-by: Aneesh Kumar K.V