Merge tag 'f2fs-for-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs

Pull f2fs updates from Jaegeuk Kim:
 "This patch-set introduces a couple of new features such as large
  sector size, FITRIM, and atomic/volatile writes.

  Several patches enhance power-off recovery and checkpoint routines.

  The fsck.f2fs starts to support fixing corrupted partitions with
  recovery hints provided by this patch-set.

  Summary:
   - retain some recovery information for fsck.f2fs
   - enhance checkpoint speed
   - enhance flush command management
   - bug fix for lseek
   - tune in-place-update policies
   - enhance roll-forward speed
   - revisit all the roll-forward and fsync rules
   - support larget sector size
   - support FITRIM
   - support atomic and volatile writes

  And several clean-ups and bug fixes are included"

* tag 'f2fs-for-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (42 commits)
  f2fs: support volatile operations for transient data
  f2fs: support atomic writes
  f2fs: remove unused return value
  f2fs: clean up f2fs_ioctl functions
  f2fs: potential shift wrapping buf in f2fs_trim_fs()
  f2fs: call f2fs_unlock_op after error was handled
  f2fs: check the use of macros on block counts and addresses
  f2fs: refactor flush_nat_entries to remove costly reorganizing ops
  f2fs: introduce FITRIM in f2fs_ioctl
  f2fs: introduce cp_control structure
  f2fs: use more free segments until SSR is activated
  f2fs: change the ipu_policy option to enable combinations
  f2fs: fix to search whole dirty segmap when get_victim
  f2fs: fix to clean previous mount option when remount_fs
  f2fs: skip punching hole in special condition
  f2fs: support large sector size
  f2fs: fix to truncate blocks past EOF in ->setattr
  f2fs: update i_size when __allocate_data_block
  f2fs: use MAX_BIO_BLOCKS(sbi)
  f2fs: remove redundant operation during roll-forward recovery
  ...

1 files changed, 40 insertions, 20 deletions

diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index 8a116a407599..8d5e6e0dd840 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -39,10 +39,16 @@ struct node_info {
 	unsigned char version;	/* version of the node */
 };
 
+enum {
+	IS_CHECKPOINTED,	/* is it checkpointed before? */
+	HAS_FSYNCED_INODE,	/* is the inode fsynced before? */
+	HAS_LAST_FSYNC,		/* has the latest node fsync mark? */
+	IS_DIRTY,		/* this nat entry is dirty? */
+};
+
 struct nat_entry {
 	struct list_head list;	/* for clean or dirty nat list */
-	bool checkpointed;	/* whether it is checkpointed or not */
-	bool fsync_done;	/* whether the latest node has fsync mark */
+	unsigned char flag;	/* for node information bits */
 	struct node_info ni;	/* in-memory node information */
 };
 
@@ -55,18 +61,32 @@ struct nat_entry {
 #define nat_get_version(nat)		(nat->ni.version)
 #define nat_set_version(nat, v)		(nat->ni.version = v)
 
-#define __set_nat_cache_dirty(nm_i, ne)					\
-	do {								\
-		ne->checkpointed = false;				\
-		list_move_tail(&ne->list, &nm_i->dirty_nat_entries);	\
-	} while (0)
-#define __clear_nat_cache_dirty(nm_i, ne)				\
-	do {								\
-		ne->checkpointed = true;				\
-		list_move_tail(&ne->list, &nm_i->nat_entries);		\
-	} while (0)
 #define inc_node_version(version)	(++version)
 
+static inline void set_nat_flag(struct nat_entry *ne,
+				unsigned int type, bool set)
+{
+	unsigned char mask = 0x01 << type;
+	if (set)
+		ne->flag |= mask;
+	else
+		ne->flag &= ~mask;
+}
+
+static inline bool get_nat_flag(struct nat_entry *ne, unsigned int type)
+{
+	unsigned char mask = 0x01 << type;
+	return ne->flag & mask;
+}
+
+static inline void nat_reset_flag(struct nat_entry *ne)
+{
+	/* these states can be set only after checkpoint was done */
+	set_nat_flag(ne, IS_CHECKPOINTED, true);
+	set_nat_flag(ne, HAS_FSYNCED_INODE, false);
+	set_nat_flag(ne, HAS_LAST_FSYNC, true);
+}
+
 static inline void node_info_from_raw_nat(struct node_info *ni,
 						struct f2fs_nat_entry *raw_ne)
 {
@@ -90,9 +110,9 @@ enum mem_type {
 };
 
 struct nat_entry_set {
-	struct list_head set_list;	/* link with all nat sets */
+	struct list_head set_list;	/* link with other nat sets */
 	struct list_head entry_list;	/* link with dirty nat entries */
-	nid_t start_nid;		/* start nid of nats in set */
+	nid_t set;			/* set number*/
 	unsigned int entry_cnt;		/* the # of nat entries in set */
 };
 
@@ -110,18 +130,19 @@ struct free_nid {
 	int state;		/* in use or not: NID_NEW or NID_ALLOC */
 };
 
-static inline int next_free_nid(struct f2fs_sb_info *sbi, nid_t *nid)
+static inline void next_free_nid(struct f2fs_sb_info *sbi, nid_t *nid)
 {
 	struct f2fs_nm_info *nm_i = NM_I(sbi);
 	struct free_nid *fnid;
 
-	if (nm_i->fcnt <= 0)
-		return -1;
 	spin_lock(&nm_i->free_nid_list_lock);
+	if (nm_i->fcnt <= 0) {
+		spin_unlock(&nm_i->free_nid_list_lock);
+		return;
+	}
 	fnid = list_entry(nm_i->free_nid_list.next, struct free_nid, list);
 	*nid = fnid->nid;
 	spin_unlock(&nm_i->free_nid_list_lock);
-	return 0;
 }
 
 /*
@@ -197,8 +218,7 @@ static inline void copy_node_footer(struct page *dst, struct page *src)
 
 static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr)
 {
-	struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb);
-	struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+	struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page));
 	struct f2fs_node *rn = F2FS_NODE(page);
 
 	rn->footer.cp_ver = ckpt->checkpoint_ver;