These patches add client and server support for the NFS v4.2 COPY operation,
and depend on the new copy_file_range() system call currently scheduled for
Linux 4.5. I gathered performance information by comparing the runtime and RPC
count of my test program, included as an RFC patch, against /usr/bin/cp for
various file sizes.
/usr/bin/cp:
size: 513MB 1024MB 1536MB 2048MB
------------- ------------- -------- -------- -------- --------
nfs v4 client total: 8203 16396 24588 32780
------------- ------------- -------- -------- -------- --------
nfs v4 client read: 4096 8192 12288 16384
nfs v4 client write: 4096 8192 12288 16384
nfs v4 client commit: 1 1 1 1
nfs v4 client open: 1 1 1 1
nfs v4 client open_noat: 2 2 2 2
nfs v4 client close: 1 1 1 1
nfs v4 client setattr: 2 2 2 2
nfs v4 client access: 2 3 3 3
nfs v4 client getattr: 2 2 2 2
/usr/bin/cp /nfs/test-512 /nfs/test-copy 0.00s user 0.32s system 14% cpu 2.209 total
/usr/bin/cp /nfs/test-1024 /nfs/test-copy 0.00s user 0.66s system 18% cpu 3.651 total
/usr/bin/cp /nfs/test-1536 /nfs/test-copy 0.02s user 0.97s system 18% cpu 5.477 total
/usr/bin/cp /nfs/test-2048 /nfs/test-copy 0.00s user 1.38s system 15% cpu 9.085 total
Copy system call:
size: 512MB 1024MB 1536MB 2048MB
------------- ------------- -------- -------- -------- --------
nfs v4 client total: 6 6 6 6
------------- ------------- -------- -------- -------- --------
nfs v4 client open: 2 2 2 2
nfs v4 client close: 2 2 2 2
nfs v4 client access: 1 1 1 1
nfs v4 client copy: 1 1 1 1
./nfscopy /nfs/test-512 /nfs/test-copy 0.00s user 0.00s system 0% cpu 1.148 total
./nfscopy /nfs/test-1024 /nfs/test-copy 0.00s user 0.00s system 0% cpu 2.293 total
./nfscopy /nfs/test-1536 /nfs/test-copy 0.00s user 0.00s system 0% cpu 3.037 total
./nfscopy /nfs/test-2048 /nfs/test-copy 0.00s user 0.00s system 0% cpu 4.045 total
Questions, comments, and other testing ideas would be greatly appreciated!
Thanks,
Anna
Anna Schumaker (4):
NFSD: Pass filehandle to nfs4_preprocess_stateid_op()
NFSD: Implement the COPY call
NFS: Add COPY nfs operation
vfs_copy_range() test program
fs/nfs/nfs42.h | 1 +
fs/nfs/nfs42proc.c | 58 ++++++++++++++++++++
fs/nfs/nfs42xdr.c | 136 ++++++++++++++++++++++++++++++++++++++++++++++
fs/nfs/nfs4file.c | 8 +++
fs/nfs/nfs4proc.c | 1 +
fs/nfs/nfs4xdr.c | 1 +
fs/nfs/objlayout/Makefile | 0
fs/nfsd/nfs4proc.c | 91 ++++++++++++++++++++++++++++---
fs/nfsd/nfs4state.c | 5 +-
fs/nfsd/nfs4xdr.c | 62 ++++++++++++++++++++-
fs/nfsd/state.h | 4 +-
fs/nfsd/vfs.c | 17 ++++++
fs/nfsd/vfs.h | 1 +
fs/nfsd/xdr4.h | 23 ++++++++
include/linux/nfs4.h | 1 +
include/linux/nfs_fs_sb.h | 1 +
include/linux/nfs_xdr.h | 27 +++++++++
nfscopy.c | 59 ++++++++++++++++++++
18 files changed, 482 insertions(+), 14 deletions(-)
create mode 100644 fs/nfs/objlayout/Makefile
create mode 100644 nfscopy.c
--
2.6.3
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