Apologies for the slow response. I'm waiting to review this carefully until the simpler (single-server) case is done. Eventually I'd be curious for any performance results, specifically: - when copying a large file, is the copy able to use all the available server<->server bandwidth? - when copying a small file, how does COPY compare to a read and a write? --b. On Fri, Sep 04, 2015 at 01:29:22PM -0400, andros@xxxxxxxxxx wrote: > From: Andy Adamson <andros@xxxxxxxxxx> > > Version 2: > > Fixed xdr issues. > Fixed stateid issues > Added lease time to copy_notify return > > > Version 1: > These patches add client and server support for NFSv4.2 inter-server to > server copy offload. These patches build upon Anna Schumaker's COPY Operation > patches which are in turn built upon Zack Brown's VFS vfs_copy_file_range > syscall. Additional functionality is added to the COPY operation past what > Anna added. The COPY_NOTIFY operation is added. > > The first three patches change Zach Brown's vfs_copy_file_range implementation. > The first two patches relax the check for only performing copy offload between > files with the same mount and super block, moving that check into a helper > function that can be called (e.g. BTRFS) in a file systems copy_file_range > function. The third patch changes vfs_copy_file_range to call the destination > file (file_out) copy_file_range f_ops proceedure instead of the file_in version. > > The remaining patches implement the COPY_NOTIFY operation and the inter-ssc > changes to the COPY operation. One source server using NL4_NETADDR is > currently supported. I used the test program from Anna's COPY > operation patch set. > > > > Andy Adamson (12): > VFS: Separate cross fs check from vfs_copy_file_range > BTRFS: Use VFS copy offload helper > VFS SQUASH use file_out instead of file_in for copy_file_range > NFS add same file check and flush source and destination for COPY > NFS add inter ssc functions to nfs42proc > NFS add COPY_NOTIFY operation > NFSD add ca_source_server<> to COPY > NFSD add COPY_NOTIFY operation > NFS add ca_source_server<> to COPY > NFSD generalize nfsd4_compound_state flag names > NFSD: allow inter server COPY to have a STALE source server fh > NFSD add nfs4 inter ssc to nfsd4_copy > > Olga Kornievskaia (4): > NFS COPY xdr changes > NFS in copy use stateid returned by copy_notify > NFS always use openstateid in COPY_NOTIFY > NFSD: extra stateid checking in read for interserver copy > > fs/btrfs/ioctl.c | 3 + > fs/nfs/nfs42.h | 2 +- > fs/nfs/nfs42proc.c | 238 +++++++++++++++++++++- > fs/nfs/nfs42xdr.c | 213 +++++++++++++++++++- > fs/nfs/nfs4_fs.h | 9 +- > fs/nfs/nfs4file.c | 17 +- > fs/nfs/nfs4proc.c | 8 +- > fs/nfs/nfs4state.c | 2 +- > fs/nfs/nfs4xdr.c | 1 + > fs/nfsd/Kconfig | 10 + > fs/nfsd/nfs4proc.c | 456 +++++++++++++++++++++++++++++++++++++++++- > fs/nfsd/nfs4state.c | 37 +++- > fs/nfsd/nfs4xdr.c | 203 ++++++++++++++++++- > fs/nfsd/nfsd.h | 2 + > fs/nfsd/state.h | 8 + > fs/nfsd/xdr4.h | 29 ++- > fs/read_write.c | 38 ++-- > include/linux/fs.h | 1 + > include/linux/nfs4.h | 7 + > include/linux/nfs4intercopy.h | 39 ++++ > include/linux/nfs_fs_sb.h | 1 + > include/linux/nfs_xdr.h | 28 +++ > 22 files changed, 1289 insertions(+), 63 deletions(-) > create mode 100644 include/linux/nfs4intercopy.h > > -- > 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
