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Date: Mon, 23 Nov 2020 10:48:21 -0800 From: Eric Biggers <ebiggers@...nel.org> To: Daeho Jeong <daeho43@...il.com> Cc: linux-kernel@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net, kernel-team@...roid.com, Daeho Jeong <daehojeong@...gle.com> Subject: Re: [f2fs-dev] [PATCH 2/2] f2fs: add F2FS_IOC_DECOMPRESS_FILE and F2FS_IOC_COMPRESS_FILE On Mon, Nov 23, 2020 at 12:17:51PM +0900, Daeho Jeong wrote: > From: Daeho Jeong <daehojeong@...gle.com> > > Added two ioctl to decompress/compress explicitly the compression > enabled file in "compress_mode=user-based" mount option. > > Using these two ioctls, the users can make a control of compression > and decompression of their files. > > Signed-off-by: Daeho Jeong <daehojeong@...gle.com> > --- > fs/f2fs/file.c | 181 +++++++++++++++++++++++++++++++++++++- > include/uapi/linux/f2fs.h | 2 + > 2 files changed, 182 insertions(+), 1 deletion(-) > > diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c > index be8db06aca27..e8f142470e87 100644 > --- a/fs/f2fs/file.c > +++ b/fs/f2fs/file.c > @@ -4026,6 +4026,180 @@ static int f2fs_ioc_set_compress_option(struct file *filp, unsigned long arg) > return ret; > } > > +static int redirty_blocks(struct inode *inode, pgoff_t page_idx, int len) > +{ > + DEFINE_READAHEAD(ractl, NULL, inode->i_mapping, page_idx); > + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); > + struct address_space *mapping = inode->i_mapping; > + struct page *page; > + pgoff_t redirty_idx = page_idx; > + int i, page_len = 0, ret = 0; > + > + page_cache_ra_unbounded(&ractl, len, 0); Using page_cache_ra_unbounded() here looks wrong. See the comment above page_cache_ra_unbounded(). > static long __f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) > { > switch (cmd) { > @@ -4113,6 +4287,10 @@ static long __f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) > return f2fs_ioc_get_compress_option(filp, arg); > case F2FS_IOC_SET_COMPRESS_OPTION: > return f2fs_ioc_set_compress_option(filp, arg); > + case F2FS_IOC_DECOMPRESS_FILE: > + return f2fs_ioc_decompress_file(filp, arg); > + case F2FS_IOC_COMPRESS_FILE: > + return f2fs_ioc_compress_file(filp, arg); > default: > return -ENOTTY; > } Where is the documentation and tests for these new ioctls? - Eric
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