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| author |   Chao Yu <yuchao0@huawei.com> | 2018-01-25 19:40:08 +0800 |
|---|---|---|
| committer |   Jaegeuk Kim <jaegeuk@kernel.org> | 2018-03-13 08:05:33 +0900 |
| commit | 199bc3fef29cacf672e7e5cd49d296c1fdc1a891 (patch) | |
| tree | 0a44af6c0911b048b57908ea1c4b40cf1e2d8fd3 | |
| parent | f2fs: fix to check extent cache in f2fs_drop_extent_tree (diff) | |
| download | wireguard-linux-199bc3fef29cacf672e7e5cd49d296c1fdc1a891.tar.xz wireguard-linux-199bc3fef29cacf672e7e5cd49d296c1fdc1a891.zip | |
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 <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| -rw-r--r-- | fs/f2fs/f2fs.h | 6 | ||||
| -rw-r--r-- | include/linux/f2fs_fs.h | 1 |
2 files changed, 7 insertions, 0 deletions
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 |