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f2fs: large volume support
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f2fs's cp has one page which consists of struct f2fs_checkpoint and
version bitmap of sit and nat. To support lots of segments, we need more
blocks for sit bitmap. So let's arrange sit bitmap as following:
+-----------------+------------+
| f2fs_checkpoint | sit bitmap |
| + nat bitmap    |            |
+-----------------+------------+
0                 4k        N blocks

Signed-off-by: Changman Lee <cm224.lee@samsung.com>
[Jaegeuk Kim: simple code change for readability]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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Changman Lee authored and Jaegeuk Kim committed Jun 4, 2014
1 parent bac4eef commit 1dbe415
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Showing 3 changed files with 53 additions and 7 deletions.
45 changes: 40 additions & 5 deletions fs/f2fs/checkpoint.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -371,7 +371,9 @@ void recover_orphan_inodes(struct f2fs_sb_info *sbi)
return;

sbi->por_doing = true;
start_blk = __start_cp_addr(sbi) + 1;

start_blk = __start_cp_addr(sbi) + 1 +
le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
orphan_blkaddr = __start_sum_addr(sbi) - 1;

ra_meta_pages(sbi, start_blk, orphan_blkaddr, META_CP);
Expand Down Expand Up @@ -512,8 +514,11 @@ int get_valid_checkpoint(struct f2fs_sb_info *sbi)
unsigned long blk_size = sbi->blocksize;
unsigned long long cp1_version = 0, cp2_version = 0;
unsigned long long cp_start_blk_no;
unsigned int cp_blks = 1 + le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
block_t cp_blk_no;
int i;

sbi->ckpt = kzalloc(blk_size, GFP_KERNEL);
sbi->ckpt = kzalloc(cp_blks * blk_size, GFP_KERNEL);
if (!sbi->ckpt)
return -ENOMEM;
/*
Expand Down Expand Up @@ -544,6 +549,23 @@ int get_valid_checkpoint(struct f2fs_sb_info *sbi)
cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
memcpy(sbi->ckpt, cp_block, blk_size);

if (cp_blks <= 1)
goto done;

cp_blk_no = le32_to_cpu(fsb->cp_blkaddr);
if (cur_page == cp2)
cp_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg);

for (i = 1; i < cp_blks; i++) {
void *sit_bitmap_ptr;
unsigned char *ckpt = (unsigned char *)sbi->ckpt;

cur_page = get_meta_page(sbi, cp_blk_no + i);
sit_bitmap_ptr = page_address(cur_page);
memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
f2fs_put_page(cur_page, 1);
}
done:
f2fs_put_page(cp1, 1);
f2fs_put_page(cp2, 1);
return 0;
Expand Down Expand Up @@ -736,6 +758,7 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, bool is_umount)
__u32 crc32 = 0;
void *kaddr;
int i;
int cp_payload_blks = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);

/*
* This avoids to conduct wrong roll-forward operations and uses
Expand Down Expand Up @@ -786,16 +809,19 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, bool is_umount)

orphan_blocks = (sbi->n_orphans + F2FS_ORPHANS_PER_BLOCK - 1)
/ F2FS_ORPHANS_PER_BLOCK;
ckpt->cp_pack_start_sum = cpu_to_le32(1 + orphan_blocks);
ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
orphan_blocks);

if (is_umount) {
set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
ckpt->cp_pack_total_block_count = cpu_to_le32(2 +
data_sum_blocks + orphan_blocks + NR_CURSEG_NODE_TYPE);
cp_payload_blks + data_sum_blocks +
orphan_blocks + NR_CURSEG_NODE_TYPE);
} else {
clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
ckpt->cp_pack_total_block_count = cpu_to_le32(2 +
data_sum_blocks + orphan_blocks);
cp_payload_blks + data_sum_blocks +
orphan_blocks);
}

if (sbi->n_orphans)
Expand All @@ -821,6 +847,15 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, bool is_umount)
set_page_dirty(cp_page);
f2fs_put_page(cp_page, 1);

for (i = 1; i < 1 + cp_payload_blks; i++) {
cp_page = grab_meta_page(sbi, start_blk++);
kaddr = page_address(cp_page);
memcpy(kaddr, (char *)ckpt + i * F2FS_BLKSIZE,
(1 << sbi->log_blocksize));
set_page_dirty(cp_page);
f2fs_put_page(cp_page, 1);
}

if (sbi->n_orphans) {
write_orphan_inodes(sbi, start_blk);
start_blk += orphan_blocks;
Expand Down
13 changes: 11 additions & 2 deletions fs/f2fs/f2fs.h
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Original file line number Diff line number Diff line change
Expand Up @@ -764,9 +764,18 @@ static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
{
struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
int offset = (flag == NAT_BITMAP) ?
int offset;

if (le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload) > 0) {
if (flag == NAT_BITMAP)
return &ckpt->sit_nat_version_bitmap;
else
return ((unsigned char *)ckpt + F2FS_BLKSIZE);
} else {
offset = (flag == NAT_BITMAP) ?
le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
return &ckpt->sit_nat_version_bitmap + offset;
return &ckpt->sit_nat_version_bitmap + offset;
}
}

static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
Expand Down
2 changes: 2 additions & 0 deletions include/linux/f2fs_fs.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@
#define F2FS_LOG_SECTORS_PER_BLOCK 3 /* 4KB: F2FS_BLKSIZE */
#define F2FS_BLKSIZE 4096 /* support only 4KB block */
#define F2FS_MAX_EXTENSION 64 /* # of extension entries */
#define F2FS_BLK_ALIGN(x) (((x) + F2FS_BLKSIZE - 1) / F2FS_BLKSIZE)

#define NULL_ADDR ((block_t)0) /* used as block_t addresses */
#define NEW_ADDR ((block_t)-1) /* used as block_t addresses */
Expand Down Expand Up @@ -75,6 +76,7 @@ struct f2fs_super_block {
__le16 volume_name[512]; /* volume name */
__le32 extension_count; /* # of extensions below */
__u8 extension_list[F2FS_MAX_EXTENSION][8]; /* extension array */
__le32 cp_payload;
} __packed;

/*
Expand Down

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