s3: remove cross-device rename support from vfs_default

cross-device rename support has some major limitations:

- on huge files clients will timeout or hang
- ACLs and EA information is not retained

Usually a client will have to handle this. A Windows Server with a reparse
point will also just return NT_STATUS_NOT_SAME_DEVICE. We will now by default
do the same.

I will add a vfs module which will restore the old cross-device renames.

1 files changed, 0 insertions, 116 deletions

diff --git a/source3/modules/vfs_default.c b/source3/modules/vfs_default.c
index ed9bb36d48..2b57f6bf36 100644
--- a/source3/modules/vfs_default.c
+++ b/source3/modules/vfs_default.c
@@ -477,117 +477,6 @@ static ssize_t vfswrap_recvfile(vfs_handle_struct *handle,
 	return result;
 }
 
-/*********************************************************
- For rename across filesystems Patch from Warren Birnbaum
- <warrenb@hpcvscdp.cv.hp.com>
-**********************************************************/
-
-static int copy_reg(const char *source, const char *dest)
-{
-	SMB_STRUCT_STAT source_stats;
-	int saved_errno;
-	int ifd = -1;
-	int ofd = -1;
-
-	if (sys_lstat(source, &source_stats, false) == -1)
-		return -1;
-
-	if (!S_ISREG (source_stats.st_ex_mode))
-		return -1;
-
-	if((ifd = sys_open (source, O_RDONLY, 0)) < 0)
-		return -1;
-
-	if (unlink (dest) && errno != ENOENT)
-		return -1;
-
-#ifdef O_NOFOLLOW
-	if((ofd = sys_open (dest, O_WRONLY | O_CREAT | O_TRUNC | O_NOFOLLOW, 0600)) < 0 )
-#else
-	if((ofd = sys_open (dest, O_WRONLY | O_CREAT | O_TRUNC , 0600)) < 0 )
-#endif
-		goto err;
-
-	if (transfer_file(ifd, ofd, (size_t)-1) == -1)
-		goto err;
-
-	/*
-	 * Try to preserve ownership.  For non-root it might fail, but that's ok.
-	 * But root probably wants to know, e.g. if NFS disallows it.
-	 */
-
-#ifdef HAVE_FCHOWN
-	if ((fchown(ofd, source_stats.st_ex_uid, source_stats.st_ex_gid) == -1) && (errno != EPERM))
-#else
-	if ((chown(dest, source_stats.st_ex_uid, source_stats.st_ex_gid) == -1) && (errno != EPERM))
-#endif
-		goto err;
-
-	/*
-	 * fchown turns off set[ug]id bits for non-root,
-	 * so do the chmod last.
-	 */
-
-#if defined(HAVE_FCHMOD)
-	if (fchmod (ofd, source_stats.st_ex_mode & 07777))
-#else
-	if (chmod (dest, source_stats.st_ex_mode & 07777))
-#endif
-		goto err;
-
-	if (close (ifd) == -1)
-		goto err;
-
-	if (close (ofd) == -1)
-		return -1;
-
-	/* Try to copy the old file's modtime and access time.  */
-#if defined(HAVE_UTIMENSAT)
-	{
-		struct timespec ts[2];
-
-		ts[0] = source_stats.st_ex_atime;
-		ts[1] = source_stats.st_ex_mtime;
-		utimensat(AT_FDCWD, dest, ts, AT_SYMLINK_NOFOLLOW);
-	}
-#elif defined(HAVE_UTIMES)
-	{
-		struct timeval tv[2];
-
-		tv[0] = convert_timespec_to_timeval(source_stats.st_ex_atime);
-		tv[1] = convert_timespec_to_timeval(source_stats.st_ex_mtime);
-#ifdef HAVE_LUTIMES
-		lutimes(dest, tv);
-#else
-		utimes(dest, tv);
-#endif
-	}
-#elif defined(HAVE_UTIME)
-	{
-		struct utimbuf tv;
-
-		tv.actime = convert_timespec_to_time_t(source_stats.st_ex_atime);
-		tv.modtime = convert_timespec_to_time_t(source_stats.st_ex_mtime);
-		utime(dest, &tv);
-	}
-#endif
-
-	if (unlink (source) == -1)
-		return -1;
-
-	return 0;
-
-  err:
-
-	saved_errno = errno;
-	if (ifd != -1)
-		close(ifd);
-	if (ofd != -1)
-		close(ofd);
-	errno = saved_errno;
-	return -1;
-}
-
 static int vfswrap_rename(vfs_handle_struct *handle,
 			  const struct smb_filename *smb_fname_src,
 			  const struct smb_filename *smb_fname_dst)
@@ -602,11 +491,6 @@ static int vfswrap_rename(vfs_handle_struct *handle,
 	}
 
 	result = rename(smb_fname_src->base_name, smb_fname_dst->base_name);
-	if ((result == -1) && (errno == EXDEV)) {
-		/* Rename across filesystems needed. */
-		result = copy_reg(smb_fname_src->base_name,
-				  smb_fname_dst->base_name);
-	}
 
  out:
 	END_PROFILE(syscall_rename);