| /**************************************************************************** |
| **************************************************************************** |
| *** |
| *** This header was automatically generated from a Linux kernel header |
| *** of the same name, to make information necessary for userspace to |
| *** call into the kernel available to libc. It contains only constants, |
| *** structures, and macros generated from the original header, and thus, |
| *** contains no copyrightable information. |
| *** |
| **************************************************************************** |
| ****************************************************************************/ |
| #ifndef _LINUX_BACKING_DEV_H |
| #define _LINUX_BACKING_DEV_H |
| |
| #include <asm/atomic.h> |
| |
| enum bdi_state { |
| BDI_pdflush, |
| BDI_write_congested, |
| BDI_read_congested, |
| BDI_unused, |
| }; |
| |
| typedef int (congested_fn)(void *, int); |
| |
| struct backing_dev_info { |
| unsigned long ra_pages; |
| unsigned long state; |
| unsigned int capabilities; |
| congested_fn *congested_fn; |
| void *congested_data; |
| void (*unplug_io_fn)(struct backing_dev_info *, struct page *); |
| void *unplug_io_data; |
| }; |
| |
| #define BDI_CAP_NO_ACCT_DIRTY 0x00000001 |
| #define BDI_CAP_NO_WRITEBACK 0x00000002 |
| #define BDI_CAP_MAP_COPY 0x00000004 |
| #define BDI_CAP_MAP_DIRECT 0x00000008 |
| #define BDI_CAP_READ_MAP 0x00000010 |
| #define BDI_CAP_WRITE_MAP 0x00000020 |
| #define BDI_CAP_EXEC_MAP 0x00000040 |
| #define BDI_CAP_VMFLAGS (BDI_CAP_READ_MAP | BDI_CAP_WRITE_MAP | BDI_CAP_EXEC_MAP) |
| |
| #if defined(VM_MAYREAD) && BDI_CAP_READ_MAP != (VM_MAYREAD || BDI_CAP_WRITE_MAP != (VM_MAYWRITE || BDI_CAP_EXEC_MAP != VM_MAYEXEC)) |
| #error please change backing_dev_info::capabilities flags |
| #endif |
| |
| #define bdi_cap_writeback_dirty(bdi) (!((bdi)->capabilities & BDI_CAP_NO_WRITEBACK)) |
| #define bdi_cap_account_dirty(bdi) (!((bdi)->capabilities & BDI_CAP_NO_ACCT_DIRTY)) |
| #define mapping_cap_writeback_dirty(mapping) bdi_cap_writeback_dirty((mapping)->backing_dev_info) |
| #define mapping_cap_account_dirty(mapping) bdi_cap_account_dirty((mapping)->backing_dev_info) |
| #endif |
