diff options
Diffstat (limited to 'c_src/include/linux/backing-dev.h')
-rw-r--r-- | c_src/include/linux/backing-dev.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/c_src/include/linux/backing-dev.h b/c_src/include/linux/backing-dev.h new file mode 100644 index 00000000..d8a86b45 --- /dev/null +++ b/c_src/include/linux/backing-dev.h @@ -0,0 +1,45 @@ +#ifndef _LINUX_BACKING_DEV_H +#define _LINUX_BACKING_DEV_H + +#include <linux/list.h> + +typedef int (congested_fn)(void *, int); + +enum wb_congested_state { + WB_async_congested, /* The async (write) queue is getting full */ + WB_sync_congested, /* The sync queue is getting full */ +}; + +struct backing_dev_info { + struct list_head bdi_list; + unsigned ra_pages; + unsigned capabilities; + + congested_fn *congested_fn; + void *congested_data; +}; + +#define BDI_CAP_NO_ACCT_DIRTY 0x00000001 +#define BDI_CAP_NO_WRITEBACK 0x00000002 +#define BDI_CAP_NO_ACCT_WB 0x00000004 +#define BDI_CAP_STABLE_WRITES 0x00000008 +#define BDI_CAP_STRICTLIMIT 0x00000010 +#define BDI_CAP_CGROUP_WRITEBACK 0x00000020 + +static inline int bdi_congested(struct backing_dev_info *bdi, int cong_bits) +{ + return 0; +} + +static inline int __must_check bdi_setup_and_register(struct backing_dev_info *bdi, + char *name) +{ + bdi->capabilities = 0; + return 0; +} + +static inline void bdi_destroy(struct backing_dev_info *bdi) {} + +#define VM_MAX_READAHEAD 128 /* kbytes */ + +#endif /* _LINUX_BACKING_DEV_H */ |