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| author |   Amir Goldstein <amir73il@gmail.com> | 2019-06-05 08:04:50 -0700 |
|---|---|---|
| committer |   Darrick J. Wong <darrick.wong@oracle.com> | 2019-06-09 10:06:20 -0700 |
| commit | 5dae222a5ff0c269730393018a5539cc970a4726 (patch) | |
| tree | e1e4e1634de00d8fb7668f575d7e25acace6518f /fs/ceph/file.c | |
| parent | xfs: use file_modified() helper (diff) | |
| download | linux-dev-5dae222a5ff0c269730393018a5539cc970a4726.tar.xz linux-dev-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 'fs/ceph/file.c')
| -rw-r--r-- | fs/ceph/file.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 31d450536175..c5517ffeb11c 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -1909,6 +1909,8 @@ static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off, if (src_inode == dst_inode) return -EINVAL; + if (src_inode->i_sb != dst_inode->i_sb) + return -EXDEV; if (ceph_snap(dst_inode) != CEPH_NOSNAP) return -EROFS; @@ -2109,7 +2111,7 @@ static ssize_t ceph_copy_file_range(struct file *src_file, loff_t src_off, ret = __ceph_copy_file_range(src_file, src_off, dst_file, dst_off, len, flags); - if (ret == -EOPNOTSUPP) + if (ret == -EOPNOTSUPP || ret == -EXDEV) ret = generic_copy_file_range(src_file, src_off, dst_file, dst_off, len, flags); return ret; |