by Chao Yu

[permalink] [raw]

Subject: Re: [f2fs-dev] [PATCH v7 2/2] f2fs: add F2FS_IOC_SET_COMPRESS_OPTION ioctl

On 2020/12/3 14:08, Jaegeuk Kim wrote:
> On 12/02, Jaegeuk Kim wrote:
>> On 12/03, Chao Yu wrote:
>>> Jaegeuk, not sure, is it too late to merge this cleanup into original patch?
>>
>> Let me merge this on top of tree. Thanks. :)
>
> I integrated this into the original patch since I had to revise this commit. :(
> ("f2fs: avoid race condition for shinker count")

It's fine to me. :)

Thanks,

>
>>
>>>
>>> From a5c63ec58e0cda6eb5d186b46942eea46422b7a9 Mon Sep 17 00:00:00 2001
>>> From: Chao Yu <[email protected]>
>>> Date: Thu, 3 Dec 2020 10:04:26 +0800
>>> Subject: [PATCH] f2fs: remove f2fs_is_compress_algorithm_valid() for cleanup
>>>
>>> No logic changes.
>>>
>>> Signed-off-by: Chao Yu <[email protected]>
>>> ---
>>> fs/f2fs/compress.c | 5 -----
>>> fs/f2fs/f2fs.h | 5 -----
>>> fs/f2fs/file.c | 2 +-
>>> 3 files changed, 1 insertion(+), 11 deletions(-)
>>>
>>> diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
>>> index dfadbc78946c..869b047a4801 100644
>>> --- a/fs/f2fs/compress.c
>>> +++ b/fs/f2fs/compress.c
>>> @@ -574,11 +574,6 @@ bool f2fs_is_compress_backend_ready(struct inode *inode)
>>> return f2fs_cops[F2FS_I(inode)->i_compress_algorithm];
>>> }
>>>
>>> -bool f2fs_is_compress_algorithm_valid(unsigned char algorithm)
>>> -{
>>> - return f2fs_cops[algorithm] != NULL;
>>> -}
>>> -
>>> static mempool_t *compress_page_pool;
>>> static int num_compress_pages = 512;
>>> module_param(num_compress_pages, uint, 0444);
>>> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
>>> index b70c8d553439..17b45c2d2b04 100644
>>> --- a/fs/f2fs/f2fs.h
>>> +++ b/fs/f2fs/f2fs.h
>>> @@ -3882,7 +3882,6 @@ bool f2fs_compress_write_end(struct inode *inode, void *fsdata,
>>> int f2fs_truncate_partial_cluster(struct inode *inode, u64 from, bool lock);
>>> void f2fs_compress_write_end_io(struct bio *bio, struct page *page);
>>> bool f2fs_is_compress_backend_ready(struct inode *inode);
>>> -bool f2fs_is_compress_algorithm_valid(unsigned char algorithm);
>>> int f2fs_init_compress_mempool(void);
>>> void f2fs_destroy_compress_mempool(void);
>>> void f2fs_do_decompress_pages(struct decompress_io_ctx *dic, bool verity);
>>> @@ -3927,10 +3926,6 @@ static inline bool f2fs_is_compress_backend_ready(struct inode *inode)
>>> /* not support compression */
>>> return false;
>>> }
>>> -static inline bool f2fs_is_compress_algorithm_valid(unsigned char algorithm)
>>> -{
>>> - return false;
>>> -}
>>> static inline struct page *f2fs_compress_control_page(struct page *page)
>>> {
>>> WARN_ON_ONCE(1);
>>> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
>>> index 300355fe25f0..0453b441228d 100644
>>> --- a/fs/f2fs/file.c
>>> +++ b/fs/f2fs/file.c
>>> @@ -4016,7 +4016,7 @@ static int f2fs_ioc_set_compress_option(struct file *filp, unsigned long arg)
>>> F2FS_I(inode)->i_cluster_size = 1 << option.log_cluster_size;
>>> f2fs_mark_inode_dirty_sync(inode, true);
>>>
>>> - if (!f2fs_is_compress_algorithm_valid(option.algorithm))
>>> + if (!f2fs_is_compress_backend_ready(inode))
>>> f2fs_warn(sbi, "compression algorithm is successfully set, "
>>> "but current kernel doesn't support this algorithm.");
>>> out:
>>> --
>>> 2.26.2
>>>
>>>
>>>
>>>
>>>
>>> On 2020/10/30 12:10, Daeho Jeong wrote:
>>>> From: Daeho Jeong <[email protected]>
>>>>
>>>> Added a new F2FS_IOC_SET_COMPRESS_OPTION ioctl to change file
>>>> compression option of a file.
>>>>
>>>> struct f2fs_comp_option {
>>>> u8 algorithm; => compression algorithm
>>>> => 0:lzo, 1:lz4, 2:zstd, 3:lzorle
>>>> u8 log_cluster_size; => log scale cluster size
>>>> => 2 ~ 8
>>>> };
>>>>
>>>> struct f2fs_comp_option option;
>>>>
>>>> option.algorithm = 1;
>>>> option.log_cluster_size = 7;
>>>>
>>>> ioctl(fd, F2FS_IOC_SET_COMPRESS_OPTION, &option);
>>>>
>>>> Signed-off-by: Daeho Jeong <[email protected]>
>>>> ---
>>>>
>>>> v6: changed the function name of checking compression algorithm validity.
>>>> v5: allowed to set algorithm which is not currently enabled by kernel.
>>>> v4: changed commit message.
>>>> v3: changed the error number more specific.
>>>> folded in fix for build breakage reported by kernel test robot
>>>> <[email protected]> and Dan Carpenter <[email protected]>.
>>>> v2: added ioctl description.
>>>> ---
>>>> fs/f2fs/compress.c | 5 +++++
>>>> fs/f2fs/f2fs.h | 7 ++++++
>>>> fs/f2fs/file.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++
>>>> 3 files changed, 66 insertions(+)
>>>>
>>>> diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
>>>> index 7895186cc765..b0144670d320 100644
>>>> --- a/fs/f2fs/compress.c
>>>> +++ b/fs/f2fs/compress.c
>>>> @@ -514,6 +514,11 @@ bool f2fs_is_compress_backend_ready(struct inode *inode)
>>>> return f2fs_cops[F2FS_I(inode)->i_compress_algorithm];
>>>> }
>>>> +bool f2fs_is_compress_algorithm_valid(unsigned char algorithm)
>>>> +{
>>>> + return f2fs_cops[algorithm] != NULL;
>>>> +}
>>>> +
>>>> static mempool_t *compress_page_pool;
>>>> static int num_compress_pages = 512;
>>>> module_param(num_compress_pages, uint, 0444);
>>>> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
>>>> index a33c90cf979b..70a8a2196888 100644
>>>> --- a/fs/f2fs/f2fs.h
>>>> +++ b/fs/f2fs/f2fs.h
>>>> @@ -435,6 +435,8 @@ static inline bool __has_cursum_space(struct f2fs_journal *journal,
>>>> struct f2fs_sectrim_range)
>>>> #define F2FS_IOC_GET_COMPRESS_OPTION _IOR(F2FS_IOCTL_MAGIC, 21, \
>>>> struct f2fs_comp_option)
>>>> +#define F2FS_IOC_SET_COMPRESS_OPTION _IOW(F2FS_IOCTL_MAGIC, 22, \
>>>> + struct f2fs_comp_option)
>>>> /*
>>>> * should be same as XFS_IOC_GOINGDOWN.
>>>> @@ -3915,6 +3917,7 @@ bool f2fs_compress_write_end(struct inode *inode, void *fsdata,
>>>> int f2fs_truncate_partial_cluster(struct inode *inode, u64 from, bool lock);
>>>> void f2fs_compress_write_end_io(struct bio *bio, struct page *page);
>>>> bool f2fs_is_compress_backend_ready(struct inode *inode);
>>>> +bool f2fs_is_compress_algorithm_valid(unsigned char algorithm);
>>>> int f2fs_init_compress_mempool(void);
>>>> void f2fs_destroy_compress_mempool(void);
>>>> void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity);
>>>> @@ -3945,6 +3948,10 @@ static inline bool f2fs_is_compress_backend_ready(struct inode *inode)
>>>> /* not support compression */
>>>> return false;
>>>> }
>>>> +static inline bool f2fs_is_compress_algorithm_valid(unsigned char algorithm)
>>>> +{
>>>> + return false;
>>>> +}
>>>> static inline struct page *f2fs_compress_control_page(struct page *page)
>>>> {
>>>> WARN_ON_ONCE(1);
>>>> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
>>>> index bd52df84219d..be56702e4939 100644
>>>> --- a/fs/f2fs/file.c
>>>> +++ b/fs/f2fs/file.c
>>>> @@ -3963,6 +3963,57 @@ static int f2fs_ioc_get_compress_option(struct file *filp, unsigned long arg)
>>>> return 0;
>>>> }
>>>> +static int f2fs_ioc_set_compress_option(struct file *filp, unsigned long arg)
>>>> +{
>>>> + struct inode *inode = file_inode(filp);
>>>> + struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
>>>> + struct f2fs_comp_option option;
>>>> + int ret = 0;
>>>> +
>>>> + if (!f2fs_sb_has_compression(sbi))
>>>> + return -EOPNOTSUPP;
>>>> +
>>>> + if (!(filp->f_mode & FMODE_WRITE))
>>>> + return -EBADF;
>>>> +
>>>> + if (copy_from_user(&option, (struct f2fs_comp_option __user *)arg,
>>>> + sizeof(option)))
>>>> + return -EFAULT;
>>>> +
>>>> + if (!f2fs_compressed_file(inode) ||
>>>> + option.log_cluster_size < MIN_COMPRESS_LOG_SIZE ||
>>>> + option.log_cluster_size > MAX_COMPRESS_LOG_SIZE ||
>>>> + option.algorithm >= COMPRESS_MAX)
>>>> + return -EINVAL;
>>>> +
>>>> + file_start_write(filp);
>>>> + inode_lock(inode);
>>>> +
>>>> + if (f2fs_is_mmap_file(inode) || get_dirty_pages(inode)) {
>>>> + ret = -EBUSY;
>>>> + goto out;
>>>> + }
>>>> +
>>>> + if (inode->i_size != 0) {
>>>> + ret = -EFBIG;
>>>> + goto out;
>>>> + }
>>>> +
>>>> + F2FS_I(inode)->i_compress_algorithm = option.algorithm;
>>>> + F2FS_I(inode)->i_log_cluster_size = option.log_cluster_size;
>>>> + F2FS_I(inode)->i_cluster_size = 1 << option.log_cluster_size;
>>>> + f2fs_mark_inode_dirty_sync(inode, true);
>>>> +
>>>> + if (!f2fs_is_compress_algorithm_valid(option.algorithm))
>>>> + f2fs_warn(sbi, "compression algorithm is successfully set, "
>>>> + "but current kernel doesn't support this algorithm.");
>>>> +out:
>>>> + inode_unlock(inode);
>>>> + file_end_write(filp);
>>>> +
>>>> + return ret;
>>>> +}
>>>> +
>>>> long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
>>>> {
>>>> if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp)))))
>>>> @@ -4053,6 +4104,8 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
>>>> return f2fs_sec_trim_file(filp, arg);
>>>> case F2FS_IOC_GET_COMPRESS_OPTION:
>>>> return f2fs_ioc_get_compress_option(filp, arg);
>>>> + case F2FS_IOC_SET_COMPRESS_OPTION:
>>>> + return f2fs_ioc_set_compress_option(filp, arg);
>>>> default:
>>>> return -ENOTTY;
>>>> }
>>>> @@ -4224,6 +4277,7 @@ long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
>>>> case F2FS_IOC_RESERVE_COMPRESS_BLOCKS:
>>>> case F2FS_IOC_SEC_TRIM_FILE:
>>>> case F2FS_IOC_GET_COMPRESS_OPTION:
>>>> + case F2FS_IOC_SET_COMPRESS_OPTION:
>>>> break;
>>>> default:
>>>> return -ENOIOCTLCMD;
>>>>
>>
>>
>> _______________________________________________
>> Linux-f2fs-devel mailing list
>> [email protected]
>> https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
> .
>