From 199bc3fef29cacf672e7e5cd49d296c1fdc1a891 Mon Sep 17 00:00:00 2001 From: Chao Yu Date: Thu, 25 Jan 2018 19:40:08 +0800 Subject: [PATCH] f2fs: support large nat bitmap Previously, we will store all nat version bitmap in checkpoint pack block, so our total node entry number has a limitation which caused total node number can not exceed (3900 * 8) block * 455 node/block = 14196000. So that once user wants to create more nodes in large size image, it becomes a bottleneck, that's unreasonable. This patch detects the new layout of nat/sit version bitmap in image in order to enable supporting large nat bitmap. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/f2fs.h | 6 ++++++ include/linux/f2fs_fs.h | 1 + 2 files changed, 7 insertions(+) diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 8b652e000326..3f4dafecd910 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1762,6 +1762,12 @@ static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag) struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); int offset; + if (is_set_ckpt_flags(sbi, CP_LARGE_NAT_BITMAP_FLAG)) { + offset = (flag == SIT_BITMAP) ? + le32_to_cpu(ckpt->nat_ver_bitmap_bytesize) : 0; + return &ckpt->sit_nat_version_bitmap + offset; + } + if (__cp_payload(sbi) > 0) { if (flag == NAT_BITMAP) return &ckpt->sit_nat_version_bitmap; diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h index 393b880afc9a..96c9bdbace50 100644 --- a/include/linux/f2fs_fs.h +++ b/include/linux/f2fs_fs.h @@ -116,6 +116,7 @@ struct f2fs_super_block { /* * For checkpoint */ +#define CP_LARGE_NAT_BITMAP_FLAG 0x00000400 #define CP_NOCRC_RECOVERY_FLAG 0x00000200 #define CP_TRIMMED_FLAG 0x00000100 #define CP_NAT_BITS_FLAG 0x00000080