111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert/**************************************************************************** 211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert **************************************************************************** 311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert *** 411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert *** This header was automatically generated from a Linux kernel header 511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert *** of the same name, to make information necessary for userspace to 611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert *** call into the kernel available to libc. It contains only constants, 711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert *** structures, and macros generated from the original header, and thus, 811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert *** contains no copyrightable information. 911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert *** 1011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert **************************************************************************** 1111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert ****************************************************************************/ 1211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#ifndef _LINUX_BACKING_DEV_H 1311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#define _LINUX_BACKING_DEV_H 1411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 1511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#include <asm/atomic.h> 1611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 1711cd02dfb91661c65134cac258cf5924270e9d2Dan Albertenum bdi_state { 1811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert BDI_pdflush, 1911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert BDI_write_congested, 2011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert BDI_read_congested, 2111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert BDI_unused, 2211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert}; 2311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 2411cd02dfb91661c65134cac258cf5924270e9d2Dan Alberttypedef int (congested_fn)(void *, int); 2511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 2611cd02dfb91661c65134cac258cf5924270e9d2Dan Albertstruct backing_dev_info { 2711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert unsigned long ra_pages; 2811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert unsigned long state; 2911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert unsigned int capabilities; 3011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert congested_fn *congested_fn; 3111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert void *congested_data; 3211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert void (*unplug_io_fn)(struct backing_dev_info *, struct page *); 3311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert void *unplug_io_data; 3411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert}; 3511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 3611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#define BDI_CAP_NO_ACCT_DIRTY 0x00000001 3711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#define BDI_CAP_NO_WRITEBACK 0x00000002 3811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#define BDI_CAP_MAP_COPY 0x00000004 3911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#define BDI_CAP_MAP_DIRECT 0x00000008 4011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#define BDI_CAP_READ_MAP 0x00000010 4111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#define BDI_CAP_WRITE_MAP 0x00000020 4211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#define BDI_CAP_EXEC_MAP 0x00000040 4311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#define BDI_CAP_VMFLAGS (BDI_CAP_READ_MAP | BDI_CAP_WRITE_MAP | BDI_CAP_EXEC_MAP) 4411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 4511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#if defined(VM_MAYREAD) && BDI_CAP_READ_MAP != (VM_MAYREAD || BDI_CAP_WRITE_MAP != (VM_MAYWRITE || BDI_CAP_EXEC_MAP != VM_MAYEXEC)) 4611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#error please change backing_dev_info::capabilities flags 4711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#endif 4811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 4911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#define bdi_cap_writeback_dirty(bdi) (!((bdi)->capabilities & BDI_CAP_NO_WRITEBACK)) 5011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#define bdi_cap_account_dirty(bdi) (!((bdi)->capabilities & BDI_CAP_NO_ACCT_DIRTY)) 5111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#define mapping_cap_writeback_dirty(mapping) bdi_cap_writeback_dirty((mapping)->backing_dev_info) 5211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#define mapping_cap_account_dirty(mapping) bdi_cap_account_dirty((mapping)->backing_dev_info) 5311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#endif 54