diff options
| author | Sachin Prabhu <sprabhu@redhat.com> | 2017-02-10 16:03:51 +0530 |
|---|---|---|
| committer | Steve French <smfrench@gmail.com> | 2017-04-07 08:04:41 -0500 |
| commit | 620d8745b35daaf507186c26b40c7ea02aed131e (patch) | |
| tree | a634c2ac96c3920c979869e66eb28ff032406a51 /fs/cifs/cifsglob.h | |
| parent | 312bbc5946c4b73dfc1d64c1dd5b0f9df8016587 (diff) | |
| download | linux-rt-620d8745b35daaf507186c26b40c7ea02aed131e.tar.gz | |
Introduce cifs_copy_file_range()
The earlier changes to copy range for cifs unintentionally disabled the more
common form of server side copy.
The patch introduces the file_operations helper cifs_copy_file_range()
which is used by the syscall copy_file_range. The new file operations
helper allows us to perform server side copies for SMB2.0 and 2.1
servers as well as SMB 3.0+ servers which do not support the ioctl
FSCTL_DUPLICATE_EXTENTS_TO_FILE.
The new helper uses the ioctl FSCTL_SRV_COPYCHUNK_WRITE to perform
server side copies. The helper is called by vfs_copy_file_range() only
once an attempt to clone the file using the ioctl
FSCTL_DUPLICATE_EXTENTS_TO_FILE has failed.
Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/cifsglob.h')
| -rw-r--r-- | fs/cifs/cifsglob.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 57c594827cb3..d07f13a63369 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -408,10 +408,10 @@ struct smb_version_operations { char * (*create_lease_buf)(u8 *, u8); /* parse lease context buffer and return oplock/epoch info */ __u8 (*parse_lease_buf)(void *, unsigned int *); - int (*copychunk_range)(const unsigned int, + ssize_t (*copychunk_range)(const unsigned int, struct cifsFileInfo *src_file, - struct cifsFileInfo *target_file, u64 src_off, u64 len, - u64 dest_off); + struct cifsFileInfo *target_file, + u64 src_off, u64 len, u64 dest_off); int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src, struct cifsFileInfo *target_file, u64 src_off, u64 len, u64 dest_off); |