1 files changed, 102 insertions, 54 deletions

diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index 269f690b4e24..7091204680f4 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -14,19 +14,14 @@
 #define NULL_SEGNO			((unsigned int)(~0))
 #define NULL_SECNO			((unsigned int)(~0))
 
-#define DEF_RECLAIM_PREFREE_SEGMENTS	100	/* 200MB of prefree segments */
+#define DEF_RECLAIM_PREFREE_SEGMENTS	5	/* 5% over total segments */
 
 /* L: Logical segment # in volume, R: Relative segment # in main area */
 #define GET_L2R_SEGNO(free_i, segno)	(segno - free_i->start_segno)
 #define GET_R2L_SEGNO(free_i, segno)	(segno + free_i->start_segno)
 
-#define IS_DATASEG(t)							\
-	((t == CURSEG_HOT_DATA) || (t == CURSEG_COLD_DATA) ||		\
-	(t == CURSEG_WARM_DATA))
-
-#define IS_NODESEG(t)							\
-	((t == CURSEG_HOT_NODE) || (t == CURSEG_COLD_NODE) ||		\
-	(t == CURSEG_WARM_NODE))
+#define IS_DATASEG(t)	(t <= CURSEG_COLD_DATA)
+#define IS_NODESEG(t)	(t >= CURSEG_HOT_NODE)
 
 #define IS_CURSEG(sbi, seg)						\
 	((seg == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno) ||	\
@@ -62,6 +57,9 @@
 	((blk_addr) - SM_I(sbi)->seg0_blkaddr)
 #define GET_SEGNO_FROM_SEG0(sbi, blk_addr)				\
 	(GET_SEGOFF_FROM_SEG0(sbi, blk_addr) >> sbi->log_blocks_per_seg)
+#define GET_BLKOFF_FROM_SEG0(sbi, blk_addr)				\
+	(GET_SEGOFF_FROM_SEG0(sbi, blk_addr) & (sbi->blocks_per_seg - 1))
+
 #define GET_SEGNO(sbi, blk_addr)					\
 	(((blk_addr == NULL_ADDR) || (blk_addr == NEW_ADDR)) ?		\
 	NULL_SEGNO : GET_L2R_SEGNO(FREE_I(sbi),			\
@@ -83,25 +81,20 @@
 	(segno / SIT_ENTRY_PER_BLOCK)
 #define	START_SEGNO(sit_i, segno)		\
 	(SIT_BLOCK_OFFSET(sit_i, segno) * SIT_ENTRY_PER_BLOCK)
+#define SIT_BLK_CNT(sbi)			\
+	((TOTAL_SEGS(sbi) + SIT_ENTRY_PER_BLOCK - 1) / SIT_ENTRY_PER_BLOCK)
 #define f2fs_bitmap_size(nr)			\
 	(BITS_TO_LONGS(nr) * sizeof(unsigned long))
 #define TOTAL_SEGS(sbi)	(SM_I(sbi)->main_segments)
 #define TOTAL_SECS(sbi)	(sbi->total_sections)
 
 #define SECTOR_FROM_BLOCK(sbi, blk_addr)				\
-	(blk_addr << ((sbi)->log_blocksize - F2FS_LOG_SECTOR_SIZE))
+	(((sector_t)blk_addr) << (sbi)->log_sectors_per_block)
 #define SECTOR_TO_BLOCK(sbi, sectors)					\
-	(sectors >> ((sbi)->log_blocksize - F2FS_LOG_SECTOR_SIZE))
+	(sectors >> (sbi)->log_sectors_per_block)
 #define MAX_BIO_BLOCKS(max_hw_blocks)					\
 	(min((int)max_hw_blocks, BIO_MAX_PAGES))
 
-/* during checkpoint, bio_private is used to synchronize the last bio */
-struct bio_private {
-	struct f2fs_sb_info *sbi;
-	bool is_sync;
-	void *wait;
-};
-
 /*
  * indicate a block allocation direction: RIGHT and LEFT.
  * RIGHT means allocating new sections towards the end of volume.
@@ -387,26 +380,12 @@ static inline void get_sit_bitmap(struct f2fs_sb_info *sbi,
 
 static inline block_t written_block_count(struct f2fs_sb_info *sbi)
 {
-	struct sit_info *sit_i = SIT_I(sbi);
-	block_t vblocks;
-
-	mutex_lock(&sit_i->sentry_lock);
-	vblocks = sit_i->written_valid_blocks;
-	mutex_unlock(&sit_i->sentry_lock);
-
-	return vblocks;
+	return SIT_I(sbi)->written_valid_blocks;
 }
 
 static inline unsigned int free_segments(struct f2fs_sb_info *sbi)
 {
-	struct free_segmap_info *free_i = FREE_I(sbi);
-	unsigned int free_segs;
-
-	read_lock(&free_i->segmap_lock);
-	free_segs = free_i->free_segments;
-	read_unlock(&free_i->segmap_lock);
-
-	return free_segs;
+	return FREE_I(sbi)->free_segments;
 }
 
 static inline int reserved_segments(struct f2fs_sb_info *sbi)
@@ -416,14 +395,7 @@ static inline int reserved_segments(struct f2fs_sb_info *sbi)
 
 static inline unsigned int free_sections(struct f2fs_sb_info *sbi)
 {
-	struct free_segmap_info *free_i = FREE_I(sbi);
-	unsigned int free_secs;
-
-	read_lock(&free_i->segmap_lock);
-	free_secs = free_i->free_sections;
-	read_unlock(&free_i->segmap_lock);
-
-	return free_secs;
+	return FREE_I(sbi)->free_sections;
 }
 
 static inline unsigned int prefree_segments(struct f2fs_sb_info *sbi)
@@ -458,8 +430,8 @@ static inline int reserved_sections(struct f2fs_sb_info *sbi)
 
 static inline bool need_SSR(struct f2fs_sb_info *sbi)
 {
-	return ((prefree_segments(sbi) / sbi->segs_per_sec)
-			+ free_sections(sbi) < overprovision_sections(sbi));
+	return (prefree_segments(sbi) / sbi->segs_per_sec)
+			+ free_sections(sbi) < overprovision_sections(sbi);
 }
 
 static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi, int freed)
@@ -467,38 +439,71 @@ static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi, int freed)
 	int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES);
 	int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS);
 
-	if (sbi->por_doing)
+	if (unlikely(sbi->por_doing))
 		return false;
 
-	return ((free_sections(sbi) + freed) <= (node_secs + 2 * dent_secs +
-						reserved_sections(sbi)));
+	return (free_sections(sbi) + freed) <= (node_secs + 2 * dent_secs +
+						reserved_sections(sbi));
 }
 
 static inline bool excess_prefree_segs(struct f2fs_sb_info *sbi)
 {
-	return (prefree_segments(sbi) > SM_I(sbi)->rec_prefree_segments);
+	return prefree_segments(sbi) > SM_I(sbi)->rec_prefree_segments;
 }
 
 static inline int utilization(struct f2fs_sb_info *sbi)
 {
-	return div_u64((u64)valid_user_blocks(sbi) * 100, sbi->user_block_count);
+	return div_u64((u64)valid_user_blocks(sbi) * 100,
+					sbi->user_block_count);
 }
 
 /*
  * Sometimes f2fs may be better to drop out-of-place update policy.
- * So, if fs utilization is over MIN_IPU_UTIL, then f2fs tries to write
- * data in the original place likewise other traditional file systems.
- * But, currently set 100 in percentage, which means it is disabled.
- * See below need_inplace_update().
+ * And, users can control the policy through sysfs entries.
+ * There are five policies with triggering conditions as follows.
+ * F2FS_IPU_FORCE - all the time,
+ * F2FS_IPU_SSR - if SSR mode is activated,
+ * F2FS_IPU_UTIL - if FS utilization is over threashold,
+ * F2FS_IPU_SSR_UTIL - if SSR mode is activated and FS utilization is over
+ *                     threashold,
+ * F2FS_IPUT_DISABLE - disable IPU. (=default option)
  */
-#define MIN_IPU_UTIL		100
+#define DEF_MIN_IPU_UTIL	70
+
+enum {
+	F2FS_IPU_FORCE,
+	F2FS_IPU_SSR,
+	F2FS_IPU_UTIL,
+	F2FS_IPU_SSR_UTIL,
+	F2FS_IPU_DISABLE,
+};
+
 static inline bool need_inplace_update(struct inode *inode)
 {
 	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+
+	/* IPU can be done only for the user data */
 	if (S_ISDIR(inode->i_mode))
 		return false;
-	if (need_SSR(sbi) && utilization(sbi) > MIN_IPU_UTIL)
+
+	switch (SM_I(sbi)->ipu_policy) {
+	case F2FS_IPU_FORCE:
 		return true;
+	case F2FS_IPU_SSR:
+		if (need_SSR(sbi))
+			return true;
+		break;
+	case F2FS_IPU_UTIL:
+		if (utilization(sbi) > SM_I(sbi)->min_ipu_util)
+			return true;
+		break;
+	case F2FS_IPU_SSR_UTIL:
+		if (need_SSR(sbi) && utilization(sbi) > SM_I(sbi)->min_ipu_util)
+			return true;
+		break;
+	case F2FS_IPU_DISABLE:
+		break;
+	}
 	return false;
 }
 
@@ -659,3 +664,46 @@ static inline unsigned int max_hw_blocks(struct f2fs_sb_info *sbi)
 	struct request_queue *q = bdev_get_queue(bdev);
 	return SECTOR_TO_BLOCK(sbi, queue_max_sectors(q));
 }
+
+/*
+ * It is very important to gather dirty pages and write at once, so that we can
+ * submit a big bio without interfering other data writes.
+ * By default, 512 pages for directory data,
+ * 512 pages (2MB) * 3 for three types of nodes, and
+ * max_bio_blocks for meta are set.
+ */
+static inline int nr_pages_to_skip(struct f2fs_sb_info *sbi, int type)
+{
+	if (type == DATA)
+		return sbi->blocks_per_seg;
+	else if (type == NODE)
+		return 3 * sbi->blocks_per_seg;
+	else if (type == META)
+		return MAX_BIO_BLOCKS(max_hw_blocks(sbi));
+	else
+		return 0;
+}
+
+/*
+ * When writing pages, it'd better align nr_to_write for segment size.
+ */
+static inline long nr_pages_to_write(struct f2fs_sb_info *sbi, int type,
+					struct writeback_control *wbc)
+{
+	long nr_to_write, desired;
+
+	if (wbc->sync_mode != WB_SYNC_NONE)
+		return 0;
+
+	nr_to_write = wbc->nr_to_write;
+
+	if (type == DATA)
+		desired = 4096;
+	else if (type == NODE)
+		desired = 3 * max_hw_blocks(sbi);
+	else
+		desired = MAX_BIO_BLOCKS(max_hw_blocks(sbi));
+
+	wbc->nr_to_write = desired;
+	return desired - nr_to_write;
+}