* [PATCH] f2fs: introduce get_checkpoint_version for cleanup
@ 2016-09-25 9:50 Tiezhu Yang
2016-09-26 18:57 ` Jaegeuk Kim
0 siblings, 1 reply; 3+ messages in thread
From: Tiezhu Yang @ 2016-09-25 9:50 UTC (permalink / raw)
To: jaegeuk; +Cc: linux-kernel, linux-f2fs-devel
There exists almost same codes when get the value of pre_version
and cur_version in function validate_checkpoint, this patch adds
get_checkpoint_version to clean up redundant codes.
Signed-off-by: Tiezhu Yang <kernelpatch@126.com>
---
fs/f2fs/checkpoint.c | 52 ++++++++++++++++++++++++++++------------------------
1 file changed, 28 insertions(+), 24 deletions(-)
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index a655d75..facede2 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -666,45 +666,49 @@ static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
}
}
-static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
- block_t cp_addr, unsigned long long *version)
+static int get_checkpoint_version(struct f2fs_sb_info *sbi, block_t cp_addr,
+ struct f2fs_checkpoint *cp_block, struct page *cp_page,
+ unsigned long long *version)
{
- struct page *cp_page_1, *cp_page_2 = NULL;
unsigned long blk_size = sbi->blocksize;
- struct f2fs_checkpoint *cp_block;
- unsigned long long cur_version = 0, pre_version = 0;
- size_t crc_offset;
+ size_t crc_offset = 0;
__u32 crc = 0;
- /* Read the 1st cp block in this CP pack */
- cp_page_1 = get_meta_page(sbi, cp_addr);
+ cp_page = get_meta_page(sbi, cp_addr);
+ cp_block = (struct f2fs_checkpoint *)page_address(cp_page);
- /* get the version number */
- cp_block = (struct f2fs_checkpoint *)page_address(cp_page_1);
crc_offset = le32_to_cpu(cp_block->checksum_offset);
if (crc_offset >= blk_size)
- goto invalid_cp1;
+ return -1;
crc = le32_to_cpu(*((__le32 *)((unsigned char *)cp_block + crc_offset)));
if (!f2fs_crc_valid(sbi, crc, cp_block, crc_offset))
- goto invalid_cp1;
+ return -1;
- pre_version = cur_cp_version(cp_block);
+ *version = cur_cp_version(cp_block);
+ return 0;
+}
- /* Read the 2nd cp block in this CP pack */
- cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
- cp_page_2 = get_meta_page(sbi, cp_addr);
+static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
+ block_t cp_addr, unsigned long long *version)
+{
+ struct page *cp_page_1 = NULL, *cp_page_2 = NULL;
+ struct f2fs_checkpoint *cp_block = NULL;
+ unsigned long long cur_version = 0, pre_version = 0;
+ int ret = 0;
- cp_block = (struct f2fs_checkpoint *)page_address(cp_page_2);
- crc_offset = le32_to_cpu(cp_block->checksum_offset);
- if (crc_offset >= blk_size)
- goto invalid_cp2;
+ ret = get_checkpoint_version(sbi, cp_addr, cp_block,
+ cp_page_1, version);
+ if (ret == -1)
+ goto invalid_cp1;
+ pre_version = *version;
- crc = le32_to_cpu(*((__le32 *)((unsigned char *)cp_block + crc_offset)));
- if (!f2fs_crc_valid(sbi, crc, cp_block, crc_offset))
+ cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
+ ret = get_checkpoint_version(sbi, cp_addr, cp_block,
+ cp_page_2, version);
+ if (ret == -1)
goto invalid_cp2;
-
- cur_version = cur_cp_version(cp_block);
+ cur_version = *version;
if (cur_version == pre_version) {
*version = cur_version;
--
1.8.3.1
------------------------------------------------------------------------------
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] f2fs: introduce get_checkpoint_version for cleanup
2016-09-25 9:50 [PATCH] f2fs: introduce get_checkpoint_version for cleanup Tiezhu Yang
@ 2016-09-26 18:57 ` Jaegeuk Kim
2016-09-26 22:26 ` Tiezhu Yang
0 siblings, 1 reply; 3+ messages in thread
From: Jaegeuk Kim @ 2016-09-26 18:57 UTC (permalink / raw)
To: Tiezhu Yang; +Cc: linux-f2fs-devel, linux-kernel
Hi Tiezhu,
On Sun, Sep 25, 2016 at 05:50:44PM +0800, Tiezhu Yang wrote:
> There exists almost same codes when get the value of pre_version
> and cur_version in function validate_checkpoint, this patch adds
> get_checkpoint_version to clean up redundant codes.
>
> Signed-off-by: Tiezhu Yang <kernelpatch@126.com>
> ---
> fs/f2fs/checkpoint.c | 52 ++++++++++++++++++++++++++++------------------------
> 1 file changed, 28 insertions(+), 24 deletions(-)
>
> diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
> index a655d75..facede2 100644
> --- a/fs/f2fs/checkpoint.c
> +++ b/fs/f2fs/checkpoint.c
> @@ -666,45 +666,49 @@ static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
> }
> }
>
> -static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
> - block_t cp_addr, unsigned long long *version)
> +static int get_checkpoint_version(struct f2fs_sb_info *sbi, block_t cp_addr,
> + struct f2fs_checkpoint *cp_block, struct page *cp_page,
> + unsigned long long *version)
> {
> - struct page *cp_page_1, *cp_page_2 = NULL;
> unsigned long blk_size = sbi->blocksize;
> - struct f2fs_checkpoint *cp_block;
> - unsigned long long cur_version = 0, pre_version = 0;
> - size_t crc_offset;
> + size_t crc_offset = 0;
> __u32 crc = 0;
>
> - /* Read the 1st cp block in this CP pack */
> - cp_page_1 = get_meta_page(sbi, cp_addr);
> + cp_page = get_meta_page(sbi, cp_addr);
> + cp_block = (struct f2fs_checkpoint *)page_address(cp_page);
>
> - /* get the version number */
> - cp_block = (struct f2fs_checkpoint *)page_address(cp_page_1);
> crc_offset = le32_to_cpu(cp_block->checksum_offset);
> if (crc_offset >= blk_size)
> - goto invalid_cp1;
> + return -1;
How about using -EINVAL with a kernel message?
>
> crc = le32_to_cpu(*((__le32 *)((unsigned char *)cp_block + crc_offset)));
> if (!f2fs_crc_valid(sbi, crc, cp_block, crc_offset))
> - goto invalid_cp1;
> + return -1;
ditto.
> - pre_version = cur_cp_version(cp_block);
> + *version = cur_cp_version(cp_block);
> + return 0;
> +}
>
> - /* Read the 2nd cp block in this CP pack */
> - cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
> - cp_page_2 = get_meta_page(sbi, cp_addr);
> +static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
> + block_t cp_addr, unsigned long long *version)
> +{
> + struct page *cp_page_1 = NULL, *cp_page_2 = NULL;
> + struct f2fs_checkpoint *cp_block = NULL;
> + unsigned long long cur_version = 0, pre_version = 0;
> + int ret = 0;
int err;
>
> - cp_block = (struct f2fs_checkpoint *)page_address(cp_page_2);
> - crc_offset = le32_to_cpu(cp_block->checksum_offset);
> - if (crc_offset >= blk_size)
> - goto invalid_cp2;
> + ret = get_checkpoint_version(sbi, cp_addr, cp_block,
> + cp_page_1, version);
> + if (ret == -1)
if (err)
> + goto invalid_cp1;
> + pre_version = *version;
>
> - crc = le32_to_cpu(*((__le32 *)((unsigned char *)cp_block + crc_offset)));
> - if (!f2fs_crc_valid(sbi, crc, cp_block, crc_offset))
> + cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
> + ret = get_checkpoint_version(sbi, cp_addr, cp_block,
> + cp_page_2, version);
> + if (ret == -1)
if (err)
> goto invalid_cp2;
> -
> - cur_version = cur_cp_version(cp_block);
> + cur_version = *version;
>
> if (cur_version == pre_version) {
> *version = cur_version;
> --
> 1.8.3.1
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] f2fs: introduce get_checkpoint_version for cleanup
2016-09-26 18:57 ` Jaegeuk Kim
@ 2016-09-26 22:26 ` Tiezhu Yang
0 siblings, 0 replies; 3+ messages in thread
From: Tiezhu Yang @ 2016-09-26 22:26 UTC (permalink / raw)
To: Jaegeuk Kim; +Cc: linux-kernel, linux-f2fs-devel
At 2016-09-27 02:57:16, "Jaegeuk Kim" <jaegeuk@kernel.org> wrote:
>Hi Tiezhu,
>
>On Sun, Sep 25, 2016 at 05:50:44PM +0800, Tiezhu Yang wrote:
>> There exists almost same codes when get the value of pre_version
>> and cur_version in function validate_checkpoint, this patch adds
>> get_checkpoint_version to clean up redundant codes.
>>
>> Signed-off-by: Tiezhu Yang <kernelpatch@126.com>
>> ---
>> fs/f2fs/checkpoint.c | 52 ++++++++++++++++++++++++++++------------------------
>> 1 file changed, 28 insertions(+), 24 deletions(-)
>>
>> diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
>> index a655d75..facede2 100644
>> --- a/fs/f2fs/checkpoint.c
>> +++ b/fs/f2fs/checkpoint.c
>> @@ -666,45 +666,49 @@ static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
>> }
>> }
>>
>> -static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
>> - block_t cp_addr, unsigned long long *version)
>> +static int get_checkpoint_version(struct f2fs_sb_info *sbi, block_t cp_addr,
>> + struct f2fs_checkpoint *cp_block, struct page *cp_page,
>> + unsigned long long *version)
>> {
>> - struct page *cp_page_1, *cp_page_2 = NULL;
>> unsigned long blk_size = sbi->blocksize;
>> - struct f2fs_checkpoint *cp_block;
>> - unsigned long long cur_version = 0, pre_version = 0;
>> - size_t crc_offset;
>> + size_t crc_offset = 0;
>> __u32 crc = 0;
>>
>> - /* Read the 1st cp block in this CP pack */
>> - cp_page_1 = get_meta_page(sbi, cp_addr);
>> + cp_page = get_meta_page(sbi, cp_addr);
>> + cp_block = (struct f2fs_checkpoint *)page_address(cp_page);
>>
>> - /* get the version number */
>> - cp_block = (struct f2fs_checkpoint *)page_address(cp_page_1);
>> crc_offset = le32_to_cpu(cp_block->checksum_offset);
>> if (crc_offset >= blk_size)
>> - goto invalid_cp1;
>> + return -1;
>
>How about using -EINVAL with a kernel message?
OK, thanks for your suggestion, I will send a v2 patch.
Thanks,
>
>>
>> crc = le32_to_cpu(*((__le32 *)((unsigned char *)cp_block + crc_offset)));
>> if (!f2fs_crc_valid(sbi, crc, cp_block, crc_offset))
>> - goto invalid_cp1;
>> + return -1;
>
>ditto.
>
>> - pre_version = cur_cp_version(cp_block);
>> + *version = cur_cp_version(cp_block);
>> + return 0;
>> +}
>>
>> - /* Read the 2nd cp block in this CP pack */
>> - cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
>> - cp_page_2 = get_meta_page(sbi, cp_addr);
>> +static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
>> + block_t cp_addr, unsigned long long *version)
>> +{
>> + struct page *cp_page_1 = NULL, *cp_page_2 = NULL;
>> + struct f2fs_checkpoint *cp_block = NULL;
>> + unsigned long long cur_version = 0, pre_version = 0;
>> + int ret = 0;
>
> int err;
>
>>
>> - cp_block = (struct f2fs_checkpoint *)page_address(cp_page_2);
>> - crc_offset = le32_to_cpu(cp_block->checksum_offset);
>> - if (crc_offset >= blk_size)
>> - goto invalid_cp2;
>> + ret = get_checkpoint_version(sbi, cp_addr, cp_block,
>> + cp_page_1, version);
>> + if (ret == -1)
>
> if (err)
>
>> + goto invalid_cp1;
>> + pre_version = *version;
>>
>> - crc = le32_to_cpu(*((__le32 *)((unsigned char *)cp_block + crc_offset)));
>> - if (!f2fs_crc_valid(sbi, crc, cp_block, crc_offset))
>> + cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
>> + ret = get_checkpoint_version(sbi, cp_addr, cp_block,
>> + cp_page_2, version);
>> + if (ret == -1)
>
> if (err)
>
>> goto invalid_cp2;
>> -
>> - cur_version = cur_cp_version(cp_block);
>> + cur_version = *version;
>>
>> if (cur_version == pre_version) {
>> *version = cur_version;
>> --
>> 1.8.3.1
------------------------------------------------------------------------------
^ permalink raw reply [flat|nested] 3+ messages in thread
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