unionfs - 2.3.3 for kernel 2.6.25

[Colin Ian King]

Hi there,

It appears that the latest and "stable" version of unionfs 2.3.3
requires some minor patches to the 2.6.25 kernel for it to build as a
module in lum.

The main changes in the patch are:

1. changing fsstack_copy_attr_all() by removing the final NULL
parameter. This patch therefore touches the following source that call
or contain fsstack_copy_attr_all()

fs/ecryptfs/dentry.c
fs/ecryptfs/inode.c
fs/ecryptfs/main.c
fs/stack.c
include/linux/fs_stack.h

Hence an ABI bump is required.

2. renaming do_splice_from(), do_splice_to()

long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
                    loff_t *ppos, size_t len, unsigned int flags)

renamed to:

long vfs_splice_from(struct pipe_inode_info *pipe, struct file *out,
                     loff_t *ppos, size_t len, unsigned int flags)

and also:

long do_splice_to(struct file *in, loff_t *ppos,
                  struct pipe_inode_info *pipe, size_t len,
                  unsigned int flags)

renamed to:

long vfs_splice_to(struct file *in, loff_t *ppos,
                   struct pipe_inode_info *pipe, size_t len,
                   unsigned int flags)

and exporting these new symbols too.

This affects:

fs/splice.c
include/linux/splice.h

3. Minor changes to fs/stack.c

fsstack_copy_attr_all() does not have final redundant get_nlicks
callback arg

4. add UNIONFS_SUPER_MAGIC to linux/magic.h

5. Add unionfs docs to Documentaion directory

Attached is the proposed patch for your examination to make sure
acceptable.

This needs to be applied to the intrepid 2.6.25 kernel before I can add
the unionfs updates to lum.

Please let me know if this is OK for me to put into Intrepid.

Colin
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