Date: Mon, 23 Jul 2018 20:36:25 +0000 (UTC) From: Warner Losh <imp@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r336651 - in head/stand/efi: include libefi Message-ID: <201807232036.w6NKaPs2012068@repo.freebsd.org>
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Author: imp Date: Mon Jul 23 20:36:25 2018 New Revision: 336651 URL: https://svnweb.freebsd.org/changeset/base/336651 Log: Implement efi_devpath_to_media_path Takes a generic device path as its input. Scans through it to find the first media_path node in it and returns a pointer to it. If none is found, NULL is returned. Sponsored by: Netflix Modified: head/stand/efi/include/efilib.h head/stand/efi/libefi/devpath.c Modified: head/stand/efi/include/efilib.h ============================================================================== --- head/stand/efi/include/efilib.h Mon Jul 23 19:49:54 2018 (r336650) +++ head/stand/efi/include/efilib.h Mon Jul 23 20:36:25 2018 (r336651) @@ -88,6 +88,7 @@ bool efi_devpath_match(EFI_DEVICE_PATH *, EFI_DEVICE_P bool efi_devpath_is_prefix(EFI_DEVICE_PATH *, EFI_DEVICE_PATH *); CHAR16 *efi_devpath_name(EFI_DEVICE_PATH *); void efi_free_devpath_name(CHAR16 *); +EFI_DEVICE_PATH *efi_devpath_to_media_path(EFI_DEVICE_PATH *); int efi_status_to_errno(EFI_STATUS); EFI_STATUS errno_to_efi_status(int errno); Modified: head/stand/efi/libefi/devpath.c ============================================================================== --- head/stand/efi/libefi/devpath.c Mon Jul 23 19:49:54 2018 (r336650) +++ head/stand/efi/libefi/devpath.c Mon Jul 23 20:36:25 2018 (r336651) @@ -195,3 +195,19 @@ efi_devpath_is_prefix(EFI_DEVICE_PATH *prefix, EFI_DEV } return (true); } + +/* + * Skip over the 'prefix' part of path and return the part of the path + * that starts with the first node that's a MEDIA_DEVICE_PATH. + */ +EFI_DEVICE_PATH * +efi_devpath_to_media_path(EFI_DEVICE_PATH *path) +{ + + while (!IsDevicePathEnd(path)) { + if (DevicePathType(path) == MEDIA_DEVICE_PATH) + return (path); + path = NextDevicePathNode(path); + } + return (NULL); +}
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