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Message-ID: <X8iAyiB0RIgm/EgB@google.com>
Date: Wed, 2 Dec 2020 22:08:10 -0800
From: Jaegeuk Kim <jaegeuk@...nel.org>
To: Chao Yu <yuchao0@...wei.com>
Cc: Daeho Jeong <daehojeong@...gle.com>, kernel-team@...roid.com,
linux-kernel@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH v7 2/2] f2fs: add F2FS_IOC_SET_COMPRESS_OPTION
ioctl
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")
>
> >
> > From a5c63ec58e0cda6eb5d186b46942eea46422b7a9 Mon Sep 17 00:00:00 2001
> > From: Chao Yu <yuchao0@...wei.com>
> > 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 <yuchao0@...wei.com>
> > ---
> > 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 <daehojeong@...gle.com>
> > >
> > > 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 <daehojeong@...gle.com>
> > > ---
> > >
> > > 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
> > > <lkp@...el.com> and Dan Carpenter <dan.carpenter@...cle.com>.
> > > 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;
> > >
>
>
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