Merge tag 'f2fs-for-5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs

Pull f2fs updates from Jaegeuk Kim:
 "In this round, we've made more work into per-file compression support.

  For example, F2FS_IOC_GET | SET_COMPRESS_OPTION provides a way to
  change the algorithm or cluster size per file. F2FS_IOC_COMPRESS |
  DECOMPRESS_FILE provides a way to compress and decompress the existing
  normal files manually.

  There is also a new mount option, compress_mode=fs|user, which can
  control who compresses the data.

  Chao also added a checksum feature with a mount option so that
  we are able to detect any corrupted cluster.

  In addition, Daniel contributed casefolding with encryption patch,
  which will be used for Android devices.

  Summary:

  Enhancements:
   - add ioctls and mount option to manage per-file compression feature
   - support casefolding with encryption
   - support checksum for compressed cluster
   - avoid IO starvation by replacing mutex with rwsem
   - add sysfs, max_io_bytes, to control max bio size

  Bug fixes:
   - fix use-after-free issue when compression and fsverity are enabled
   - fix consistency corruption during fault injection test
   - fix data offset for lseek
   - get rid of buffer_head which has 32bits limit in fiemap
   - fix some bugs in multi-partitions support
   - fix nat entry count calculation in shrinker
   - fix some stat information

  And, we've refactored some logics and fix minor bugs as well"

* tag 'f2fs-for-5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (36 commits)
  f2fs: compress: fix compression chksum
  f2fs: fix shift-out-of-bounds in sanity_check_raw_super()
  f2fs: fix race of pending_pages in decompression
  f2fs: fix to account inline xattr correctly during recovery
  f2fs: inline: fix wrong inline inode stat
  f2fs: inline: correct comment in f2fs_recover_inline_data
  f2fs: don't check PAGE_SIZE again in sanity_check_raw_super()
  f2fs: convert to F2FS_*_INO macro
  f2fs: introduce max_io_bytes, a sysfs entry, to limit bio size
  f2fs: don't allow any writes on readonly mount
  f2fs: avoid race condition for shrinker count
  f2fs: add F2FS_IOC_DECOMPRESS_FILE and F2FS_IOC_COMPRESS_FILE
  f2fs: add compress_mode mount option
  f2fs: Remove unnecessary unlikely()
  f2fs: init dirty_secmap incorrectly
  f2fs: remove buffer_head which has 32bits limit
  f2fs: fix wrong block count instead of bytes
  f2fs: use new conversion functions between blks and bytes
  f2fs: rename logical_to_blk and blk_to_logical
  f2fs: fix kbytes written stat for multi-device case
  ...

1 files changed, 29 insertions, 22 deletions

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 1596502f7375..deca74cb17df 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -529,31 +529,38 @@ void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi, bool from_bg)
 	else
 		f2fs_build_free_nids(sbi, false, false);
 
-	if (!is_idle(sbi, REQ_TIME) &&
-		(!excess_dirty_nats(sbi) && !excess_dirty_nodes(sbi)))
+	if (excess_dirty_nats(sbi) || excess_dirty_nodes(sbi) ||
+		excess_prefree_segs(sbi))
+		goto do_sync;
+
+	/* there is background inflight IO or foreground operation recently */
+	if (is_inflight_io(sbi, REQ_TIME) ||
+		(!f2fs_time_over(sbi, REQ_TIME) && rwsem_is_locked(&sbi->cp_rwsem)))
 		return;
 
+	/* exceed periodical checkpoint timeout threshold */
+	if (f2fs_time_over(sbi, CP_TIME))
+		goto do_sync;
+
 	/* checkpoint is the only way to shrink partial cached entries */
-	if (!f2fs_available_free_memory(sbi, NAT_ENTRIES) ||
-			!f2fs_available_free_memory(sbi, INO_ENTRIES) ||
-			excess_prefree_segs(sbi) ||
-			excess_dirty_nats(sbi) ||
-			excess_dirty_nodes(sbi) ||
-			f2fs_time_over(sbi, CP_TIME)) {
-		if (test_opt(sbi, DATA_FLUSH) && from_bg) {
-			struct blk_plug plug;
-
-			mutex_lock(&sbi->flush_lock);
-
-			blk_start_plug(&plug);
-			f2fs_sync_dirty_inodes(sbi, FILE_INODE);
-			blk_finish_plug(&plug);
+	if (f2fs_available_free_memory(sbi, NAT_ENTRIES) ||
+		f2fs_available_free_memory(sbi, INO_ENTRIES))
+		return;
 
-			mutex_unlock(&sbi->flush_lock);
-		}
-		f2fs_sync_fs(sbi->sb, true);
-		stat_inc_bg_cp_count(sbi->stat_info);
+do_sync:
+	if (test_opt(sbi, DATA_FLUSH) && from_bg) {
+		struct blk_plug plug;
+
+		mutex_lock(&sbi->flush_lock);
+
+		blk_start_plug(&plug);
+		f2fs_sync_dirty_inodes(sbi, FILE_INODE);
+		blk_finish_plug(&plug);
+
+		mutex_unlock(&sbi->flush_lock);
 	}
+	f2fs_sync_fs(sbi->sb, true);
+	stat_inc_bg_cp_count(sbi->stat_info);
 }
 
 static int __submit_flush_wait(struct f2fs_sb_info *sbi,
@@ -3254,7 +3261,7 @@ static int __get_segment_type_6(struct f2fs_io_info *fio)
 			else
 				return CURSEG_COLD_DATA;
 		}
-		if (file_is_cold(inode) || f2fs_compressed_file(inode))
+		if (file_is_cold(inode) || f2fs_need_compress_data(inode))
 			return CURSEG_COLD_DATA;
 		if (file_is_hot(inode) ||
 				is_inode_flag_set(inode, FI_HOT_DATA) ||
@@ -4544,7 +4551,7 @@ static void init_dirty_segmap(struct f2fs_sb_info *sbi)
 		return;
 
 	mutex_lock(&dirty_i->seglist_lock);
-	for (segno = 0; segno < MAIN_SECS(sbi); segno += blks_per_sec) {
+	for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) {
 		valid_blocks = get_valid_blocks(sbi, segno, true);
 		secno = GET_SEC_FROM_SEG(sbi, segno);