[PATCH v5 0/9] VFS: In-kernel copy system call

[Anna Schumaker <Anna.Schumaker@netapp.com>]

Copy system calls came up during Plumbers a while ago, mostly because several
filesystems (including NFS and XFS) are currently working on copy acceleration
implementations.  We haven't heard from Zach Brown in a while, so I volunteered
to push his patches upstream so individual filesystems don't need to keep
writing their own ioctls.

This posting fixes a few issues that popped up after I submitted v4 yesterday.

Changes in v5:
- Bump syscall number (again)
- Add sys_copy_file_range() to include/linux/syscalls.h
- Change flags parameter on btrfs to an unsigned int


Anna Schumaker (6):
  vfs: Copy should check len after file open mode
  vfs: Copy shouldn't forbid ranges inside the same file
  vfs: Copy should use file_out rather than file_in
  vfs: Remove copy_file_range mountpoint checks
  vfs: Add vfs_copy_file_range() support for pagecache copies
  btrfs: btrfs_copy_file_range() only supports reflinks

Zach Brown (3):
  vfs: add copy_file_range syscall and vfs helper
  x86: add sys_copy_file_range to syscall tables
  btrfs: add .copy_file_range file operation

 arch/x86/entry/syscalls/syscall_32.tbl |   1 +
 arch/x86/entry/syscalls/syscall_64.tbl |   1 +
 fs/btrfs/ctree.h                       |   3 +
 fs/btrfs/file.c                        |   1 +
 fs/btrfs/ioctl.c                       |  95 +++++++++++++---------
 fs/read_write.c                        | 141 +++++++++++++++++++++++++++++++++
 include/linux/copy.h                   |   6 ++
 include/linux/fs.h                     |   3 +
 include/linux/syscalls.h               |   3 +
 include/uapi/asm-generic/unistd.h      |   4 +-
 include/uapi/linux/Kbuild              |   1 +
 include/uapi/linux/copy.h              |   8 ++
 kernel/sys_ni.c                        |   1 +
 13 files changed, 228 insertions(+), 40 deletions(-)
 create mode 100644 include/linux/copy.h
 create mode 100644 include/uapi/linux/copy.h

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2.6.0