s3: VFS: vfs_streams_xattr. Implement renameat().

Currently identical to rename().

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>

diff --git a/source3/modules/vfs_streams_xattr.c b/source3/modules/vfs_streams_xattr.c
index 3e840d9535ee7351efa36ffa37a7b7c0351502c7..7f53a3c167c9edf3bb2335561a7f7df11cf91c87 100644 (file)
--- a/source3/modules/vfs_streams_xattr.c
+++ b/source3/modules/vfs_streams_xattr.c
@@ -682,6 +682,99 @@ static int streams_xattr_rename(vfs_handle_struct *handle,
        return ret;
 }
 
+static int streams_xattr_renameat(vfs_handle_struct *handle,
+                               files_struct *srcfsp,
+                               const struct smb_filename *smb_fname_src,
+                               files_struct *dstfsp,
+                               const struct smb_filename *smb_fname_dst)
+{
+       NTSTATUS status;
+       int ret = -1;
+       char *src_xattr_name = NULL;
+       char *dst_xattr_name = NULL;
+       bool src_is_stream, dst_is_stream;
+       ssize_t oret;
+       ssize_t nret;
+       struct ea_struct ea;
+
+       src_is_stream = is_ntfs_stream_smb_fname(smb_fname_src);
+       dst_is_stream = is_ntfs_stream_smb_fname(smb_fname_dst);
+
+       if (!src_is_stream && !dst_is_stream) {
+               return SMB_VFS_NEXT_RENAMEAT(handle,
+                                       srcfsp,
+                                       smb_fname_src,
+                                       dstfsp,
+                                       smb_fname_dst);
+       }
+
+       /* For now don't allow renames from or to the default stream. */
+       if (is_ntfs_default_stream_smb_fname(smb_fname_src) ||
+           is_ntfs_default_stream_smb_fname(smb_fname_dst)) {
+               errno = ENOSYS;
+               goto done;
+       }
+
+       /* Don't rename if the streams are identical. */
+       if (strcasecmp_m(smb_fname_src->stream_name,
+                      smb_fname_dst->stream_name) == 0) {
+               goto done;
+       }
+
+       /* Get the xattr names. */
+       status = streams_xattr_get_name(handle, talloc_tos(),
+                                       smb_fname_src->stream_name,
+                                       &src_xattr_name);
+       if (!NT_STATUS_IS_OK(status)) {
+               errno = map_errno_from_nt_status(status);
+               goto fail;
+       }
+       status = streams_xattr_get_name(handle, talloc_tos(),
+                                       smb_fname_dst->stream_name,
+                                       &dst_xattr_name);
+       if (!NT_STATUS_IS_OK(status)) {
+               errno = map_errno_from_nt_status(status);
+               goto fail;
+       }
+
+       /* read the old stream */
+       status = get_ea_value(talloc_tos(), handle->conn, NULL,
+                             smb_fname_src, src_xattr_name, &ea);
+       if (!NT_STATUS_IS_OK(status)) {
+               errno = ENOENT;
+               goto fail;
+       }
+
+       /* (over)write the new stream */
+       nret = SMB_VFS_SETXATTR(handle->conn, smb_fname_src,
+                               dst_xattr_name, ea.value.data, ea.value.length,
+                               0);
+       if (nret < 0) {
+               if (errno == ENOATTR) {
+                       errno = ENOENT;
+               }
+               goto fail;
+       }
+
+       /* remove the old stream */
+       oret = SMB_VFS_REMOVEXATTR(handle->conn, smb_fname_src,
+                                  src_xattr_name);
+       if (oret < 0) {
+               if (errno == ENOATTR) {
+                       errno = ENOENT;
+               }
+               goto fail;
+       }
+
+ done:
+       errno = 0;
+       ret = 0;
+ fail:
+       TALLOC_FREE(src_xattr_name);
+       TALLOC_FREE(dst_xattr_name);
+       return ret;
+}
+
 static NTSTATUS walk_xattr_streams(vfs_handle_struct *handle,
                                files_struct *fsp,
                                const struct smb_filename *smb_fname,
@@ -1657,6 +1750,7 @@ static struct vfs_fn_pointers vfs_streams_xattr_fns = {
        .pwrite_recv_fn = streams_xattr_pwrite_recv,
        .unlink_fn = streams_xattr_unlink,
        .rename_fn = streams_xattr_rename,
+       .renameat_fn = streams_xattr_renameat,
        .ftruncate_fn = streams_xattr_ftruncate,
        .fallocate_fn = streams_xattr_fallocate,
        .streaminfo_fn = streams_xattr_streaminfo,