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-rw-r--r--fs/ext4/ext4.h54
1 files changed, 41 insertions, 13 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index e227eea23f0..984ca0cb38c 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -65,6 +65,12 @@ typedef __u32 ext4_lblk_t;
/* data type for block group number */
typedef unsigned int ext4_group_t;
+/*
+ * Flags used in mballoc's allocation_context flags field.
+ *
+ * Also used to show what's going on for debugging purposes when the
+ * flag field is exported via the traceport interface
+ */
/* prefer goal again. length */
#define EXT4_MB_HINT_MERGE 0x0001
@@ -127,6 +133,16 @@ struct mpage_da_data {
int pages_written;
int retval;
};
+#define DIO_AIO_UNWRITTEN 0x1
+typedef struct ext4_io_end {
+ struct list_head list; /* per-file finished AIO list */
+ struct inode *inode; /* file being written to */
+ unsigned int flag; /* unwritten or not */
+ int error; /* I/O error code */
+ ext4_lblk_t offset; /* offset in the file */
+ size_t size; /* size of the extent */
+ struct work_struct work; /* data work queue */
+} ext4_io_end_t;
/*
* Special inodes numbers
@@ -347,7 +363,16 @@ struct ext4_new_group_data {
/* Call ext4_da_update_reserve_space() after successfully
allocating the blocks */
#define EXT4_GET_BLOCKS_UPDATE_RESERVE_SPACE 0x0008
-
+ /* caller is from the direct IO path, request to creation of an
+ unitialized extents if not allocated, split the uninitialized
+ extent if blocks has been preallocated already*/
+#define EXT4_GET_BLOCKS_DIO 0x0010
+#define EXT4_GET_BLOCKS_CONVERT 0x0020
+#define EXT4_GET_BLOCKS_DIO_CREATE_EXT (EXT4_GET_BLOCKS_DIO|\
+ EXT4_GET_BLOCKS_CREATE_UNINIT_EXT)
+ /* Convert extent to initialized after direct IO complete */
+#define EXT4_GET_BLOCKS_DIO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\
+ EXT4_GET_BLOCKS_DIO_CREATE_EXT)
/*
* ioctl commands
@@ -500,8 +525,8 @@ struct move_extent {
static inline __le32 ext4_encode_extra_time(struct timespec *time)
{
return cpu_to_le32((sizeof(time->tv_sec) > 4 ?
- time->tv_sec >> 32 : 0) |
- ((time->tv_nsec << 2) & EXT4_NSEC_MASK));
+ (time->tv_sec >> 32) & EXT4_EPOCH_MASK : 0) |
+ ((time->tv_nsec << EXT4_EPOCH_BITS) & EXT4_NSEC_MASK));
}
static inline void ext4_decode_extra_time(struct timespec *time, __le32 extra)
@@ -509,7 +534,7 @@ static inline void ext4_decode_extra_time(struct timespec *time, __le32 extra)
if (sizeof(time->tv_sec) > 4)
time->tv_sec |= (__u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK)
<< 32;
- time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> 2;
+ time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> EXT4_EPOCH_BITS;
}
#define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \
@@ -672,6 +697,11 @@ struct ext4_inode_info {
__u16 i_extra_isize;
spinlock_t i_block_reservation_lock;
+
+ /* completed async DIOs that might need unwritten extents handling */
+ struct list_head i_aio_dio_complete_list;
+ /* current io_end structure for async DIO write*/
+ ext4_io_end_t *cur_aio_dio;
};
/*
@@ -942,18 +972,11 @@ struct ext4_sb_info {
unsigned int s_mb_stats;
unsigned int s_mb_order2_reqs;
unsigned int s_mb_group_prealloc;
+ unsigned int s_max_writeback_mb_bump;
/* where last allocation was done - for stream allocation */
unsigned long s_mb_last_group;
unsigned long s_mb_last_start;
- /* history to debug policy */
- struct ext4_mb_history *s_mb_history;
- int s_mb_history_cur;
- int s_mb_history_max;
- int s_mb_history_num;
- spinlock_t s_mb_history_lock;
- int s_mb_history_filter;
-
/* stats for buddy allocator */
spinlock_t s_mb_pa_lock;
atomic_t s_bal_reqs; /* number of reqs with len > 1 */
@@ -980,6 +1003,9 @@ struct ext4_sb_info {
unsigned int s_log_groups_per_flex;
struct flex_groups *s_flex_groups;
+
+ /* workqueue for dio unwritten */
+ struct workqueue_struct *dio_unwritten_wq;
};
static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb)
@@ -1397,7 +1423,7 @@ extern int ext4_block_truncate_page(handle_t *handle,
struct address_space *mapping, loff_t from);
extern int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
extern qsize_t ext4_get_reserved_space(struct inode *inode);
-
+extern int flush_aio_dio_completed_IO(struct inode *inode);
/* ioctl.c */
extern long ext4_ioctl(struct file *, unsigned int, unsigned long);
extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long);
@@ -1699,6 +1725,8 @@ extern void ext4_ext_init(struct super_block *);
extern void ext4_ext_release(struct super_block *);
extern long ext4_fallocate(struct inode *inode, int mode, loff_t offset,
loff_t len);
+extern int ext4_convert_unwritten_extents(struct inode *inode, loff_t offset,
+ loff_t len);
extern int ext4_get_blocks(handle_t *handle, struct inode *inode,
sector_t block, unsigned int max_blocks,
struct buffer_head *bh, int flags);