f2fs: clean up symbol namespace

As Ted reported:

"Hi, I was looking at f2fs's sources recently, and I noticed that there
is a very large number of non-static symbols which don't have a f2fs
prefix.  There's well over a hundred (see attached below).

As one example, in fs/f2fs/dir.c there is:

unsigned char get_de_type(struct f2fs_dir_entry *de)

This function is clearly only useful for f2fs, but it has a generic
name.  This means that if any other file system tries to have the same
symbol name, there will be a symbol conflict and the kernel would not
successfully build.  It also means that when someone is looking f2fs
sources, it's not at all obvious whether a function such as
read_data_page(), invalidate_blocks(), is a generic kernel function
found in the fs, mm, or block layers, or a f2fs specific function.

You might want to fix this at some point.  Hopefully Kent's bcachefs
isn't similarly using genericly named functions, since that might
cause conflicts with f2fs's functions --- but just as this would be a
problem that we would rightly insist that Kent fix, this is something
that we should have rightly insisted that f2fs should have fixed
before it was integrated into the mainline kernel.

acquire_orphan_inode
add_ino_entry
add_orphan_inode
allocate_data_block
allocate_new_segments
alloc_nid
alloc_nid_done
alloc_nid_failed
available_free_memory
...."

This patch adds "f2fs_" prefix for all non-static symbols in order to:
a) avoid conflict with other kernel generic symbols;
b) to indicate the function is f2fs specific one instead of generic
one;

Reported-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 96 insertions, 89 deletions

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 888297c585a7..f0f9593185a7 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -169,7 +169,7 @@ found:
 	return result - size + __reverse_ffz(tmp);
 }
 
-bool need_SSR(struct f2fs_sb_info *sbi)
+bool f2fs_need_SSR(struct f2fs_sb_info *sbi)
 {
 	int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES);
 	int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS);
@@ -184,7 +184,7 @@ bool need_SSR(struct f2fs_sb_info *sbi)
 			SM_I(sbi)->min_ssr_sections + reserved_sections(sbi));
 }
 
-void register_inmem_page(struct inode *inode, struct page *page)
+void f2fs_register_inmem_page(struct inode *inode, struct page *page)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 	struct f2fs_inode_info *fi = F2FS_I(inode);
@@ -239,7 +239,8 @@ static int __revoke_inmem_pages(struct inode *inode,
 			trace_f2fs_commit_inmem_page(page, INMEM_REVOKE);
 retry:
 			set_new_dnode(&dn, inode, NULL, NULL, 0);
-			err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
+			err = f2fs_get_dnode_of_data(&dn, page->index,
+								LOOKUP_NODE);
 			if (err) {
 				if (err == -ENOMEM) {
 					congestion_wait(BLK_RW_ASYNC, HZ/50);
@@ -249,9 +250,9 @@ retry:
 				err = -EAGAIN;
 				goto next;
 			}
-			get_node_info(sbi, dn.nid, &ni);
+			f2fs_get_node_info(sbi, dn.nid, &ni);
 			if (cur->old_addr == NEW_ADDR) {
-				invalidate_blocks(sbi, dn.data_blkaddr);
+				f2fs_invalidate_blocks(sbi, dn.data_blkaddr);
 				f2fs_update_data_blkaddr(&dn, NEW_ADDR);
 			} else
 				f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
@@ -273,7 +274,7 @@ next:
 	return err;
 }
 
-void drop_inmem_pages_all(struct f2fs_sb_info *sbi, bool gc_failure)
+void f2fs_drop_inmem_pages_all(struct f2fs_sb_info *sbi, bool gc_failure)
 {
 	struct list_head *head = &sbi->inode_list[ATOMIC_FILE];
 	struct inode *inode;
@@ -296,7 +297,7 @@ next:
 		}
 drop:
 		set_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST);
-		drop_inmem_pages(inode);
+		f2fs_drop_inmem_pages(inode);
 		iput(inode);
 	}
 skip:
@@ -305,7 +306,7 @@ skip:
 	goto next;
 }
 
-void drop_inmem_pages(struct inode *inode)
+void f2fs_drop_inmem_pages(struct inode *inode)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 	struct f2fs_inode_info *fi = F2FS_I(inode);
@@ -323,7 +324,7 @@ void drop_inmem_pages(struct inode *inode)
 	stat_dec_atomic_write(inode);
 }
 
-void drop_inmem_page(struct inode *inode, struct page *page)
+void f2fs_drop_inmem_page(struct inode *inode, struct page *page)
 {
 	struct f2fs_inode_info *fi = F2FS_I(inode);
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
@@ -353,7 +354,7 @@ void drop_inmem_page(struct inode *inode, struct page *page)
 	trace_f2fs_commit_inmem_page(page, INMEM_INVALIDATE);
 }
 
-static int __commit_inmem_pages(struct inode *inode)
+static int __f2fs_commit_inmem_pages(struct inode *inode)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 	struct f2fs_inode_info *fi = F2FS_I(inode);
@@ -383,14 +384,14 @@ static int __commit_inmem_pages(struct inode *inode)
 			f2fs_wait_on_page_writeback(page, DATA, true);
 			if (clear_page_dirty_for_io(page)) {
 				inode_dec_dirty_pages(inode);
-				remove_dirty_inode(inode);
+				f2fs_remove_dirty_inode(inode);
 			}
 retry:
 			fio.page = page;
 			fio.old_blkaddr = NULL_ADDR;
 			fio.encrypted_page = NULL;
 			fio.need_lock = LOCK_DONE;
-			err = do_write_data_page(&fio);
+			err = f2fs_do_write_data_page(&fio);
 			if (err) {
 				if (err == -ENOMEM) {
 					congestion_wait(BLK_RW_ASYNC, HZ/50);
@@ -431,7 +432,7 @@ retry:
 	return err;
 }
 
-int commit_inmem_pages(struct inode *inode)
+int f2fs_commit_inmem_pages(struct inode *inode)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 	struct f2fs_inode_info *fi = F2FS_I(inode);
@@ -443,7 +444,7 @@ int commit_inmem_pages(struct inode *inode)
 	set_inode_flag(inode, FI_ATOMIC_COMMIT);
 
 	mutex_lock(&fi->inmem_lock);
-	err = __commit_inmem_pages(inode);
+	err = __f2fs_commit_inmem_pages(inode);
 
 	spin_lock(&sbi->inode_lock[ATOMIC_FILE]);
 	if (!list_empty(&fi->inmem_ilist))
@@ -490,24 +491,24 @@ void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi)
 		return;
 
 	/* try to shrink extent cache when there is no enough memory */
-	if (!available_free_memory(sbi, EXTENT_CACHE))
+	if (!f2fs_available_free_memory(sbi, EXTENT_CACHE))
 		f2fs_shrink_extent_tree(sbi, EXTENT_CACHE_SHRINK_NUMBER);
 
 	/* check the # of cached NAT entries */
-	if (!available_free_memory(sbi, NAT_ENTRIES))
-		try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK);
+	if (!f2fs_available_free_memory(sbi, NAT_ENTRIES))
+		f2fs_try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK);
 
-	if (!available_free_memory(sbi, FREE_NIDS))
-		try_to_free_nids(sbi, MAX_FREE_NIDS);
+	if (!f2fs_available_free_memory(sbi, FREE_NIDS))
+		f2fs_try_to_free_nids(sbi, MAX_FREE_NIDS);
 	else
-		build_free_nids(sbi, false, false);
+		f2fs_build_free_nids(sbi, false, false);
 
 	if (!is_idle(sbi) && !excess_dirty_nats(sbi))
 		return;
 
 	/* checkpoint is the only way to shrink partial cached entries */
-	if (!available_free_memory(sbi, NAT_ENTRIES) ||
-			!available_free_memory(sbi, INO_ENTRIES) ||
+	if (!f2fs_available_free_memory(sbi, NAT_ENTRIES) ||
+			!f2fs_available_free_memory(sbi, INO_ENTRIES) ||
 			excess_prefree_segs(sbi) ||
 			excess_dirty_nats(sbi) ||
 			f2fs_time_over(sbi, CP_TIME)) {
@@ -515,7 +516,7 @@ void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi)
 			struct blk_plug plug;
 
 			blk_start_plug(&plug);
-			sync_dirty_inodes(sbi, FILE_INODE);
+			f2fs_sync_dirty_inodes(sbi, FILE_INODE);
 			blk_finish_plug(&plug);
 		}
 		f2fs_sync_fs(sbi->sb, true);
@@ -548,7 +549,7 @@ static int submit_flush_wait(struct f2fs_sb_info *sbi, nid_t ino)
 		return __submit_flush_wait(sbi, sbi->sb->s_bdev);
 
 	for (i = 0; i < sbi->s_ndevs; i++) {
-		if (!is_dirty_device(sbi, ino, i, FLUSH_INO))
+		if (!f2fs_is_dirty_device(sbi, ino, i, FLUSH_INO))
 			continue;
 		ret = __submit_flush_wait(sbi, FDEV(i).bdev);
 		if (ret)
@@ -659,7 +660,7 @@ int f2fs_issue_flush(struct f2fs_sb_info *sbi, nid_t ino)
 	return cmd.ret;
 }
 
-int create_flush_cmd_control(struct f2fs_sb_info *sbi)
+int f2fs_create_flush_cmd_control(struct f2fs_sb_info *sbi)
 {
 	dev_t dev = sbi->sb->s_bdev->bd_dev;
 	struct flush_cmd_control *fcc;
@@ -696,7 +697,7 @@ init_thread:
 	return err;
 }
 
-void destroy_flush_cmd_control(struct f2fs_sb_info *sbi, bool free)
+void f2fs_destroy_flush_cmd_control(struct f2fs_sb_info *sbi, bool free)
 {
 	struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info;
 
@@ -1022,7 +1023,7 @@ static struct discard_cmd *__insert_discard_tree(struct f2fs_sb_info *sbi,
 		goto do_insert;
 	}
 
-	p = __lookup_rb_tree_for_insert(sbi, &dcc->root, &parent, lstart);
+	p = f2fs_lookup_rb_tree_for_insert(sbi, &dcc->root, &parent, lstart);
 do_insert:
 	dc = __attach_discard_cmd(sbi, bdev, lstart, start, len, parent, p);
 	if (!dc)
@@ -1087,7 +1088,7 @@ static void __update_discard_tree_range(struct f2fs_sb_info *sbi,
 
 	mutex_lock(&dcc->cmd_lock);
 
-	dc = (struct discard_cmd *)__lookup_rb_tree_ret(&dcc->root,
+	dc = (struct discard_cmd *)f2fs_lookup_rb_tree_ret(&dcc->root,
 					NULL, lstart,
 					(struct rb_entry **)&prev_dc,
 					(struct rb_entry **)&next_dc,
@@ -1198,7 +1199,8 @@ static int __issue_discard_cmd(struct f2fs_sb_info *sbi,
 		mutex_lock(&dcc->cmd_lock);
 		if (list_empty(pend_list))
 			goto next;
-		f2fs_bug_on(sbi, !__check_rb_tree_consistence(sbi, &dcc->root));
+		f2fs_bug_on(sbi,
+			!f2fs_check_rb_tree_consistence(sbi, &dcc->root));
 		blk_start_plug(&plug);
 		list_for_each_entry_safe(dc, tmp, pend_list, list) {
 			f2fs_bug_on(sbi, dc->state != D_PREP);
@@ -1251,7 +1253,7 @@ static bool __drop_discard_cmd(struct f2fs_sb_info *sbi)
 	return dropped;
 }
 
-void drop_discard_cmd(struct f2fs_sb_info *sbi)
+void f2fs_drop_discard_cmd(struct f2fs_sb_info *sbi)
 {
 	__drop_discard_cmd(sbi);
 }
@@ -1342,7 +1344,8 @@ static void f2fs_wait_discard_bio(struct f2fs_sb_info *sbi, block_t blkaddr)
 	bool need_wait = false;
 
 	mutex_lock(&dcc->cmd_lock);
-	dc = (struct discard_cmd *)__lookup_rb_tree(&dcc->root, NULL, blkaddr);
+	dc = (struct discard_cmd *)f2fs_lookup_rb_tree(&dcc->root,
+							NULL, blkaddr);
 	if (dc) {
 		if (dc->state == D_PREP) {
 			__punch_discard_cmd(sbi, dc, blkaddr);
@@ -1357,7 +1360,7 @@ static void f2fs_wait_discard_bio(struct f2fs_sb_info *sbi, block_t blkaddr)
 		__wait_one_discard_bio(sbi, dc);
 }
 
-void stop_discard_thread(struct f2fs_sb_info *sbi)
+void f2fs_stop_discard_thread(struct f2fs_sb_info *sbi)
 {
 	struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
 
@@ -1605,7 +1608,7 @@ static void release_discard_addr(struct discard_entry *entry)
 	kmem_cache_free(discard_entry_slab, entry);
 }
 
-void release_discard_addrs(struct f2fs_sb_info *sbi)
+void f2fs_release_discard_addrs(struct f2fs_sb_info *sbi)
 {
 	struct list_head *head = &(SM_I(sbi)->dcc_info->entry_list);
 	struct discard_entry *entry, *this;
@@ -1616,7 +1619,7 @@ void release_discard_addrs(struct f2fs_sb_info *sbi)
 }
 
 /*
- * Should call clear_prefree_segments after checkpoint is done.
+ * Should call f2fs_clear_prefree_segments after checkpoint is done.
  */
 static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi)
 {
@@ -1629,7 +1632,8 @@ static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi)
 	mutex_unlock(&dirty_i->seglist_lock);
 }
 
-void clear_prefree_segments(struct f2fs_sb_info *sbi, struct cp_control *cpc)
+void f2fs_clear_prefree_segments(struct f2fs_sb_info *sbi,
+						struct cp_control *cpc)
 {
 	struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
 	struct list_head *head = &dcc->entry_list;
@@ -1771,7 +1775,7 @@ static void destroy_discard_cmd_control(struct f2fs_sb_info *sbi)
 	if (!dcc)
 		return;
 
-	stop_discard_thread(sbi);
+	f2fs_stop_discard_thread(sbi);
 
 	kfree(dcc);
 	SM_I(sbi)->dcc_info = NULL;
@@ -1887,7 +1891,7 @@ static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del)
 		get_sec_entry(sbi, segno)->valid_blocks += del;
 }
 
-void invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr)
+void f2fs_invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr)
 {
 	unsigned int segno = GET_SEGNO(sbi, addr);
 	struct sit_info *sit_i = SIT_I(sbi);
@@ -1907,7 +1911,7 @@ void invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr)
 	up_write(&sit_i->sentry_lock);
 }
 
-bool is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr)
+bool f2fs_is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr)
 {
 	struct sit_info *sit_i = SIT_I(sbi);
 	unsigned int segno, offset;
@@ -1946,7 +1950,7 @@ static void __add_sum_entry(struct f2fs_sb_info *sbi, int type,
 /*
  * Calculate the number of current summary pages for writing
  */
-int npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra)
+int f2fs_npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra)
 {
 	int valid_sum_count = 0;
 	int i, sum_in_page;
@@ -1976,14 +1980,15 @@ int npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra)
 /*
  * Caller should put this summary page
  */
-struct page *get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno)
+struct page *f2fs_get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno)
 {
-	return get_meta_page(sbi, GET_SUM_BLOCK(sbi, segno));
+	return f2fs_get_meta_page(sbi, GET_SUM_BLOCK(sbi, segno));
 }
 
-void update_meta_page(struct f2fs_sb_info *sbi, void *src, block_t blk_addr)
+void f2fs_update_meta_page(struct f2fs_sb_info *sbi,
+					void *src, block_t blk_addr)
 {
-	struct page *page = grab_meta_page(sbi, blk_addr);
+	struct page *page = f2fs_grab_meta_page(sbi, blk_addr);
 
 	memcpy(page_address(page), src, PAGE_SIZE);
 	set_page_dirty(page);
@@ -1993,14 +1998,14 @@ void update_meta_page(struct f2fs_sb_info *sbi, void *src, block_t blk_addr)
 static void write_sum_page(struct f2fs_sb_info *sbi,
 			struct f2fs_summary_block *sum_blk, block_t blk_addr)
 {
-	update_meta_page(sbi, (void *)sum_blk, blk_addr);
+	f2fs_update_meta_page(sbi, (void *)sum_blk, blk_addr);
 }
 
 static void write_current_sum_page(struct f2fs_sb_info *sbi,
 						int type, block_t blk_addr)
 {
 	struct curseg_info *curseg = CURSEG_I(sbi, type);
-	struct page *page = grab_meta_page(sbi, blk_addr);
+	struct page *page = f2fs_grab_meta_page(sbi, blk_addr);
 	struct f2fs_summary_block *src = curseg->sum_blk;
 	struct f2fs_summary_block *dst;
 
@@ -2245,7 +2250,7 @@ static void change_curseg(struct f2fs_sb_info *sbi, int type)
 	curseg->alloc_type = SSR;
 	__next_free_blkoff(sbi, curseg, 0);
 
-	sum_page = get_sum_page(sbi, new_segno);
+	sum_page = f2fs_get_sum_page(sbi, new_segno);
 	sum_node = (struct f2fs_summary_block *)page_address(sum_page);
 	memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE);
 	f2fs_put_page(sum_page, 1);
@@ -2259,7 +2264,7 @@ static int get_ssr_segment(struct f2fs_sb_info *sbi, int type)
 	int i, cnt;
 	bool reversed = false;
 
-	/* need_SSR() already forces to do this */
+	/* f2fs_need_SSR() already forces to do this */
 	if (v_ops->get_victim(sbi, &segno, BG_GC, type, SSR)) {
 		curseg->next_segno = segno;
 		return 1;
@@ -2311,7 +2316,7 @@ static void allocate_segment_by_default(struct f2fs_sb_info *sbi,
 		new_curseg(sbi, type, false);
 	else if (curseg->alloc_type == LFS && is_next_segment_free(sbi, type))
 		new_curseg(sbi, type, false);
-	else if (need_SSR(sbi) && get_ssr_segment(sbi, type))
+	else if (f2fs_need_SSR(sbi) && get_ssr_segment(sbi, type))
 		change_curseg(sbi, type);
 	else
 		new_curseg(sbi, type, false);
@@ -2319,7 +2324,7 @@ static void allocate_segment_by_default(struct f2fs_sb_info *sbi,
 	stat_inc_seg_type(sbi, curseg);
 }
 
-void allocate_new_segments(struct f2fs_sb_info *sbi)
+void f2fs_allocate_new_segments(struct f2fs_sb_info *sbi)
 {
 	struct curseg_info *curseg;
 	unsigned int old_segno;
@@ -2341,7 +2346,8 @@ static const struct segment_allocation default_salloc_ops = {
 	.allocate_segment = allocate_segment_by_default,
 };
 
-bool exist_trim_candidates(struct f2fs_sb_info *sbi, struct cp_control *cpc)
+bool f2fs_exist_trim_candidates(struct f2fs_sb_info *sbi,
+						struct cp_control *cpc)
 {
 	__u64 trim_start = cpc->trim_start;
 	bool has_candidate = false;
@@ -2374,9 +2380,9 @@ next:
 	issued = 0;
 
 	mutex_lock(&dcc->cmd_lock);
-	f2fs_bug_on(sbi, !__check_rb_tree_consistence(sbi, &dcc->root));
+	f2fs_bug_on(sbi, !f2fs_check_rb_tree_consistence(sbi, &dcc->root));
 
-	dc = (struct discard_cmd *)__lookup_rb_tree_ret(&dcc->root,
+	dc = (struct discard_cmd *)f2fs_lookup_rb_tree_ret(&dcc->root,
 					NULL, start,
 					(struct rb_entry **)&prev_dc,
 					(struct rb_entry **)&next_dc,
@@ -2457,7 +2463,7 @@ int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range)
 		goto out;
 
 	mutex_lock(&sbi->gc_mutex);
-	err = write_checkpoint(sbi, &cpc);
+	err = f2fs_write_checkpoint(sbi, &cpc);
 	mutex_unlock(&sbi->gc_mutex);
 	if (err)
 		goto out;
@@ -2491,7 +2497,7 @@ static bool __has_curseg_space(struct f2fs_sb_info *sbi, int type)
 	return false;
 }
 
-int rw_hint_to_seg_type(enum rw_hint hint)
+int f2fs_rw_hint_to_seg_type(enum rw_hint hint)
 {
 	switch (hint) {
 	case WRITE_LIFE_SHORT:
@@ -2564,7 +2570,7 @@ int rw_hint_to_seg_type(enum rw_hint hint)
  * WRITE_LIFE_LONG       "                        WRITE_LIFE_LONG
  */
 
-enum rw_hint io_type_to_rw_hint(struct f2fs_sb_info *sbi,
+enum rw_hint f2fs_io_type_to_rw_hint(struct f2fs_sb_info *sbi,
 				enum page_type type, enum temp_type temp)
 {
 	if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER) {
@@ -2635,7 +2641,7 @@ static int __get_segment_type_6(struct f2fs_io_info *fio)
 				is_inode_flag_set(inode, FI_ATOMIC_FILE) ||
 				is_inode_flag_set(inode, FI_VOLATILE_FILE))
 			return CURSEG_HOT_DATA;
-		return rw_hint_to_seg_type(inode->i_write_hint);
+		return f2fs_rw_hint_to_seg_type(inode->i_write_hint);
 	} else {
 		if (IS_DNODE(fio->page))
 			return is_cold_node(fio->page) ? CURSEG_WARM_NODE :
@@ -2671,7 +2677,7 @@ static int __get_segment_type(struct f2fs_io_info *fio)
 	return type;
 }
 
-void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
+void f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
 		block_t old_blkaddr, block_t *new_blkaddr,
 		struct f2fs_summary *sum, int type,
 		struct f2fs_io_info *fio, bool add_list)
@@ -2754,7 +2760,7 @@ static void update_device_state(struct f2fs_io_info *fio)
 	devidx = f2fs_target_device_index(sbi, fio->new_blkaddr);
 
 	/* update device state for fsync */
-	set_dirty_device(sbi, fio->ino, devidx, FLUSH_INO);
+	f2fs_set_dirty_device(sbi, fio->ino, devidx, FLUSH_INO);
 
 	/* update device state for checkpoint */
 	if (!f2fs_test_bit(devidx, (char *)&sbi->dirty_device)) {
@@ -2772,7 +2778,7 @@ static void do_write_page(struct f2fs_summary *sum, struct f2fs_io_info *fio)
 	if (keep_order)
 		down_read(&fio->sbi->io_order_lock);
 reallocate:
-	allocate_data_block(fio->sbi, fio->page, fio->old_blkaddr,
+	f2fs_allocate_data_block(fio->sbi, fio->page, fio->old_blkaddr,
 			&fio->new_blkaddr, sum, type, fio, true);
 
 	/* writeout dirty page into bdev */
@@ -2788,7 +2794,7 @@ reallocate:
 		up_read(&fio->sbi->io_order_lock);
 }
 
-void write_meta_page(struct f2fs_sb_info *sbi, struct page *page,
+void f2fs_do_write_meta_page(struct f2fs_sb_info *sbi, struct page *page,
 					enum iostat_type io_type)
 {
 	struct f2fs_io_info fio = {
@@ -2814,7 +2820,7 @@ void write_meta_page(struct f2fs_sb_info *sbi, struct page *page,
 	f2fs_update_iostat(sbi, io_type, F2FS_BLKSIZE);
 }
 
-void write_node_page(unsigned int nid, struct f2fs_io_info *fio)
+void f2fs_do_write_node_page(unsigned int nid, struct f2fs_io_info *fio)
 {
 	struct f2fs_summary sum;
 
@@ -2824,14 +2830,15 @@ void write_node_page(unsigned int nid, struct f2fs_io_info *fio)
 	f2fs_update_iostat(fio->sbi, fio->io_type, F2FS_BLKSIZE);
 }
 
-void write_data_page(struct dnode_of_data *dn, struct f2fs_io_info *fio)
+void f2fs_outplace_write_data(struct dnode_of_data *dn,
+					struct f2fs_io_info *fio)
 {
 	struct f2fs_sb_info *sbi = fio->sbi;
 	struct f2fs_summary sum;
 	struct node_info ni;
 
 	f2fs_bug_on(sbi, dn->data_blkaddr == NULL_ADDR);
-	get_node_info(sbi, dn->nid, &ni);
+	f2fs_get_node_info(sbi, dn->nid, &ni);
 	set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
 	do_write_page(&sum, fio);
 	f2fs_update_data_blkaddr(dn, fio->new_blkaddr);
@@ -2839,7 +2846,7 @@ void write_data_page(struct dnode_of_data *dn, struct f2fs_io_info *fio)
 	f2fs_update_iostat(sbi, fio->io_type, F2FS_BLKSIZE);
 }
 
-int rewrite_data_page(struct f2fs_io_info *fio)
+int f2fs_inplace_write_data(struct f2fs_io_info *fio)
 {
 	int err;
 	struct f2fs_sb_info *sbi = fio->sbi;
@@ -2874,7 +2881,7 @@ static inline int __f2fs_get_curseg(struct f2fs_sb_info *sbi,
 	return i;
 }
 
-void __f2fs_replace_block(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
+void f2fs_do_replace_block(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
 				block_t old_blkaddr, block_t new_blkaddr,
 				bool recover_curseg, bool recover_newaddr)
 {
@@ -2959,7 +2966,7 @@ void f2fs_replace_block(struct f2fs_sb_info *sbi, struct dnode_of_data *dn,
 
 	set_summary(&sum, dn->nid, dn->ofs_in_node, version);
 
-	__f2fs_replace_block(sbi, &sum, old_addr, new_addr,
+	f2fs_do_replace_block(sbi, &sum, old_addr, new_addr,
 					recover_curseg, recover_newaddr);
 
 	f2fs_update_data_blkaddr(dn, new_addr);
@@ -3005,7 +3012,7 @@ static void read_compacted_summaries(struct f2fs_sb_info *sbi)
 
 	start = start_sum_block(sbi);
 
-	page = get_meta_page(sbi, start++);
+	page = f2fs_get_meta_page(sbi, start++);
 	kaddr = (unsigned char *)page_address(page);
 
 	/* Step 1: restore nat cache */
@@ -3045,7 +3052,7 @@ static void read_compacted_summaries(struct f2fs_sb_info *sbi)
 			f2fs_put_page(page, 1);
 			page = NULL;
 
-			page = get_meta_page(sbi, start++);
+			page = f2fs_get_meta_page(sbi, start++);
 			kaddr = (unsigned char *)page_address(page);
 			offset = 0;
 		}
@@ -3084,7 +3091,7 @@ static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
 			blk_addr = GET_SUM_BLOCK(sbi, segno);
 	}
 
-	new = get_meta_page(sbi, blk_addr);
+	new = f2fs_get_meta_page(sbi, blk_addr);
 	sum = (struct f2fs_summary_block *)page_address(new);
 
 	if (IS_NODESEG(type)) {
@@ -3096,7 +3103,7 @@ static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
 				ns->ofs_in_node = 0;
 			}
 		} else {
-			restore_node_summary(sbi, segno, sum);
+			f2fs_restore_node_summary(sbi, segno, sum);
 		}
 	}
 
@@ -3128,10 +3135,10 @@ static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
 	int err;
 
 	if (is_set_ckpt_flags(sbi, CP_COMPACT_SUM_FLAG)) {
-		int npages = npages_for_summary_flush(sbi, true);
+		int npages = f2fs_npages_for_summary_flush(sbi, true);
 
 		if (npages >= 2)
-			ra_meta_pages(sbi, start_sum_block(sbi), npages,
+			f2fs_ra_meta_pages(sbi, start_sum_block(sbi), npages,
 							META_CP, true);
 
 		/* restore for compacted data summary */
@@ -3140,7 +3147,7 @@ static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
 	}
 
 	if (__exist_node_summaries(sbi))
-		ra_meta_pages(sbi, sum_blk_addr(sbi, NR_CURSEG_TYPE, type),
+		f2fs_ra_meta_pages(sbi, sum_blk_addr(sbi, NR_CURSEG_TYPE, type),
 					NR_CURSEG_TYPE - type, META_CP, true);
 
 	for (; type <= CURSEG_COLD_NODE; type++) {
@@ -3166,7 +3173,7 @@ static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr)
 	int written_size = 0;
 	int i, j;
 
-	page = grab_meta_page(sbi, blkaddr++);
+	page = f2fs_grab_meta_page(sbi, blkaddr++);
 	kaddr = (unsigned char *)page_address(page);
 	memset(kaddr, 0, PAGE_SIZE);
 
@@ -3191,7 +3198,7 @@ static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr)
 
 		for (j = 0; j < blkoff; j++) {
 			if (!page) {
-				page = grab_meta_page(sbi, blkaddr++);
+				page = f2fs_grab_meta_page(sbi, blkaddr++);
 				kaddr = (unsigned char *)page_address(page);
 				memset(kaddr, 0, PAGE_SIZE);
 				written_size = 0;
@@ -3228,7 +3235,7 @@ static void write_normal_summaries(struct f2fs_sb_info *sbi,
 		write_current_sum_page(sbi, i, blkaddr + (i - type));
 }
 
-void write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
+void f2fs_write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
 {
 	if (is_set_ckpt_flags(sbi, CP_COMPACT_SUM_FLAG))
 		write_compacted_summaries(sbi, start_blk);
@@ -3236,12 +3243,12 @@ void write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
 		write_normal_summaries(sbi, start_blk, CURSEG_HOT_DATA);
 }
 
-void write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
+void f2fs_write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
 {
 	write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE);
 }
 
-int lookup_journal_in_cursum(struct f2fs_journal *journal, int type,
+int f2fs_lookup_journal_in_cursum(struct f2fs_journal *journal, int type,
 					unsigned int val, int alloc)
 {
 	int i;
@@ -3266,7 +3273,7 @@ int lookup_journal_in_cursum(struct f2fs_journal *journal, int type,
 static struct page *get_current_sit_page(struct f2fs_sb_info *sbi,
 					unsigned int segno)
 {
-	return get_meta_page(sbi, current_sit_addr(sbi, segno));
+	return f2fs_get_meta_page(sbi, current_sit_addr(sbi, segno));
 }
 
 static struct page *get_next_sit_page(struct f2fs_sb_info *sbi,
@@ -3279,7 +3286,7 @@ static struct page *get_next_sit_page(struct f2fs_sb_info *sbi,
 	src_off = current_sit_addr(sbi, start);
 	dst_off = next_sit_addr(sbi, src_off);
 
-	page = grab_meta_page(sbi, dst_off);
+	page = f2fs_grab_meta_page(sbi, dst_off);
 	seg_info_to_sit_page(sbi, page, start);
 
 	set_page_dirty(page);
@@ -3375,7 +3382,7 @@ static void remove_sits_in_journal(struct f2fs_sb_info *sbi)
  * CP calls this function, which flushes SIT entries including sit_journal,
  * and moves prefree segs to free segs.
  */
-void flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
+void f2fs_flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 {
 	struct sit_info *sit_i = SIT_I(sbi);
 	unsigned long *bitmap = sit_i->dirty_sentries_bitmap;
@@ -3447,7 +3454,7 @@ void flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 			}
 
 			if (to_journal) {
-				offset = lookup_journal_in_cursum(journal,
+				offset = f2fs_lookup_journal_in_cursum(journal,
 							SIT_JOURNAL, segno, 1);
 				f2fs_bug_on(sbi, offset < 0);
 				segno_in_journal(journal, offset) =
@@ -3663,7 +3670,7 @@ static int build_sit_entries(struct f2fs_sb_info *sbi)
 	block_t total_node_blocks = 0;
 
 	do {
-		readed = ra_meta_pages(sbi, start_blk, BIO_MAX_PAGES,
+		readed = f2fs_ra_meta_pages(sbi, start_blk, BIO_MAX_PAGES,
 							META_SIT, true);
 
 		start = start_blk * sit_i->sents_per_block;
@@ -3881,7 +3888,7 @@ static void init_min_max_mtime(struct f2fs_sb_info *sbi)
 	up_write(&sit_i->sentry_lock);
 }
 
-int build_segment_manager(struct f2fs_sb_info *sbi)
+int f2fs_build_segment_manager(struct f2fs_sb_info *sbi)
 {
 	struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
 	struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
@@ -3918,7 +3925,7 @@ int build_segment_manager(struct f2fs_sb_info *sbi)
 	init_rwsem(&sm_info->curseg_lock);
 
 	if (!f2fs_readonly(sbi->sb)) {
-		err = create_flush_cmd_control(sbi);
+		err = f2fs_create_flush_cmd_control(sbi);
 		if (err)
 			return err;
 	}
@@ -4043,13 +4050,13 @@ static void destroy_sit_info(struct f2fs_sb_info *sbi)
 	kfree(sit_i);
 }
 
-void destroy_segment_manager(struct f2fs_sb_info *sbi)
+void f2fs_destroy_segment_manager(struct f2fs_sb_info *sbi)
 {
 	struct f2fs_sm_info *sm_info = SM_I(sbi);
 
 	if (!sm_info)
 		return;
-	destroy_flush_cmd_control(sbi, true);
+	f2fs_destroy_flush_cmd_control(sbi, true);
 	destroy_discard_cmd_control(sbi);
 	destroy_dirty_segmap(sbi);
 	destroy_curseg(sbi);
@@ -4059,7 +4066,7 @@ void destroy_segment_manager(struct f2fs_sb_info *sbi)
 	kfree(sm_info);
 }
 
-int __init create_segment_manager_caches(void)
+int __init f2fs_create_segment_manager_caches(void)
 {
 	discard_entry_slab = f2fs_kmem_cache_create("discard_entry",
 			sizeof(struct discard_entry));
@@ -4092,7 +4099,7 @@ fail:
 	return -ENOMEM;
 }
 
-void destroy_segment_manager_caches(void)
+void f2fs_destroy_segment_manager_caches(void)
 {
 	kmem_cache_destroy(sit_entry_set_slab);
 	kmem_cache_destroy(discard_cmd_slab);