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 adresses Christoph's comments. I'm pretty sure that splice() is already interruptible, so I don't know what else needs to be done for this system call. I haven't started work on a "sparse" copy flag yet. I would like to focus on the base system call first, and then add that later if it's still desired. Changes in v6: - Squash together most patches. - Drop all flags except COPY_FR_REFLINK. - Drop patch removing same mountpoint check. - Change default behavior (flags = 0) to a data copy. Anna Schumaker (1): vfs: Add vfs_copy_file_range() support for pagecache copies 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 | 94 +++++++++++++---------- fs/read_write.c | 133 +++++++++++++++++++++++++++++++++ include/linux/fs.h | 3 + include/linux/syscalls.h | 3 + include/uapi/asm-generic/unistd.h | 4 +- include/uapi/linux/fs.h | 2 + kernel/sys_ni.c | 1 + 11 files changed, 206 insertions(+), 40 deletions(-) -- 2.6.1 -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
