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| author | Amir Goldstein <amir73il@gmail.com> | 2019-06-05 17:04:50 +0200 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2019-06-09 19:06:20 +0200 |
| commit | 5dae222a5ff0c269730393018a5539cc970a4726 (patch) | |
| tree | e1e4e1634de00d8fb7668f575d7e25acace6518f /lib/errseq.c | |
| parent | xfs: use file_modified() helper (diff) | |
| download | linux-5dae222a5ff0c269730393018a5539cc970a4726.tar.xz linux-5dae222a5ff0c269730393018a5539cc970a4726.zip | |
vfs: allow copy_file_range to copy across devices
We want to enable cross-filesystem copy_file_range functionality
where possible, so push the "same superblock only" checks down to
the individual filesystem callouts so they can make their own
decisions about cross-superblock copy offload and fallack to
generic_copy_file_range() for cross-superblock copy.
[Amir] We do not call ->remap_file_range() in case the files are not
on the same sb and do not call ->copy_file_range() in case the files
do not belong to the same filesystem driver.
This changes behavior of the copy_file_range(2) syscall, which will
now allow cross filesystem in-kernel copy. CIFS already supports
cross-superblock copy, between two shares to the same server. This
functionality will now be available via the copy_file_range(2) syscall.
Cc: Steve French <stfrench@microsoft.com>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'lib/errseq.c')
0 files changed, 0 insertions, 0 deletions