btrfs-progs: receive: make receive fall back on EPERM

For non-root usage, receive can't write compressed data and will get
EPERM, but falling back to writing uncompressed data may work and allows
receive as a normal user, which is safer.

Signed-off-by: Sweet Tea Dorminy <sweettea-kernel@dorminy.me>

Author: sweettea

cmds/receive.c

@@ -1285,7 +1285,7 @@ static int process_encoded_write(const char *path, const void *data, u64 offset,
 		if (ret >= 0)
 			return 0;
 		/* Fall back for these errors, fail hard for anything else. */
-		if (errno != ENOSPC && errno != ENOTTY && errno != EINVAL) {
+		if (errno != ENOSPC && errno != ENOTTY && errno != EINVAL && errno != EPERM) {
 			ret = -errno;
 			error("encoded_write: writing to %s failed: %m", path);
 			return ret;