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| author | Steve French <steve.french@primarydata.com> | 2015-06-27 21:18:36 -0700 |
|---|---|---|
| committer | Steve French <steve.french@primarydata.com> | 2015-06-28 21:15:38 -0500 |
| commit | 02b1666544c08e245cb4e2253ed575f8128943d6 (patch) | |
| tree | ed2967b35329e08bf327c1985104ec06016c96b8 /fs/cifs/smb2pdu.h | |
| parent | aab1893d5fbeb7c931e97189f54a71ab0ecbf4c7 (diff) | |
| download | lwn-02b1666544c08e245cb4e2253ed575f8128943d6.tar.gz lwn-02b1666544c08e245cb4e2253ed575f8128943d6.zip | |
Add reflink copy over SMB3.11 with new FSCTL_DUPLICATE_EXTENTS
Getting fantastic copy performance with cp --reflink over SMB3.11
using the new FSCTL_DUPLICATE_EXTENTS.
This FSCTL was added in the SMB3.11 dialect (testing was
against REFS file system) so have put it as a 3.11 protocol
specific operation ("vers=3.1.1" on the mount). Tested at
the SMB3 plugfest in Redmond.
It depends on the new FS Attribute (BLOCK_REFCOUNTING) which
is used to advertise support for the ability to do this ioctl
(if you can support multiple files pointing to the same block
than this refcounting ability or equivalent is needed to
support the new reflink-like duplicate extent SMB3 ioctl.
Signed-off-by: Steve French <steve.french@primarydata.com>
Diffstat (limited to 'fs/cifs/smb2pdu.h')
| -rw-r--r-- | fs/cifs/smb2pdu.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h index 725283a7d887..8e7bbe54ebb0 100644 --- a/fs/cifs/smb2pdu.h +++ b/fs/cifs/smb2pdu.h @@ -654,6 +654,14 @@ struct compress_ioctl { __le16 CompressionState; /* See cifspdu.h for possible flag values */ } __packed; +struct duplicate_extents_to_file { + __u64 PersistentFileHandle; /* source file handle, opaque endianness */ + __u64 VolatileFileHandle; + __le64 SourceFileOffset; + __le64 TargetFileOffset; + __le64 ByteCount; /* Bytes to be copied */ +} __packed; + struct smb2_ioctl_req { struct smb2_hdr hdr; __le16 StructureSize; /* Must be 57 */ |