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f2fs: clean up i_compress_flag and i_compress_level usage 

.i_compress_level was introduced by commit 3fde13f817 ("f2fs: compress:
support compress level"), but never be used.

This patch updates as below:
- load high 8-bits of on-disk .i_compress_flag to in-memory .i_compress_level
- load low 8-bits of on-disk .i_compress_flag to in-memory .i_compress_flag
- change type of in-memory .i_compress_flag from unsigned short to unsigned
char.

w/ above changes, we can avoid unneeded bit shift whenever during
.init_compress_ctx(), and shrink size of struct f2fs_inode_info.

Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2023-01-28 18:30:11 +08:00 committed by Jaegeuk Kim
parent 2eae077e6e
commit b90e5086df
3 changed files with 19 additions and 12 deletions
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8
fs/f2fs/compress.c
View File

@ -241,7 +241,7 @@ static int lz4_init_compress_ctx(struct compress_ctx *cc)
unsigned int size = LZ4_MEM_COMPRESS;
#ifdef CONFIG_F2FS_FS_LZ4HC
if (F2FS_I(cc->inode)->i_compress_flag >> COMPRESS_LEVEL_OFFSET)
if (F2FS_I(cc->inode)->i_compress_level)
size = LZ4HC_MEM_COMPRESS;
#endif
@ -267,8 +267,7 @@ static void lz4_destroy_compress_ctx(struct compress_ctx *cc)
#ifdef CONFIG_F2FS_FS_LZ4HC
static int lz4hc_compress_pages(struct compress_ctx *cc)
{
unsigned char level = F2FS_I(cc->inode)->i_compress_flag >>
COMPRESS_LEVEL_OFFSET;
unsigned char level = F2FS_I(cc->inode)->i_compress_level;
int len;
if (level)
@ -340,8 +339,7 @@ static int zstd_init_compress_ctx(struct compress_ctx *cc)
zstd_cstream *stream;
void *workspace;
unsigned int workspace_size;
unsigned char level = F2FS_I(cc->inode)->i_compress_flag >>
COMPRESS_LEVEL_OFFSET;
unsigned char level = F2FS_I(cc->inode)->i_compress_level;
if (!level)
level = F2FS_ZSTD_DEFAULT_CLEVEL;

7
fs/f2fs/f2fs.h
View File

@ -869,7 +869,7 @@ struct f2fs_inode_info {
unsigned char i_compress_algorithm; /* algorithm type */
unsigned char i_log_cluster_size; /* log of cluster size */
unsigned char i_compress_level; /* compress level (lz4hc,zstd) */
unsigned short i_compress_flag; /* compress flag */
unsigned char i_compress_flag; /* compress flag */
unsigned int i_cluster_size; /* cluster size */
unsigned int atomic_write_cnt;
@ -4358,9 +4358,8 @@ static inline int set_compress_context(struct inode *inode)
if ((F2FS_I(inode)->i_compress_algorithm == COMPRESS_LZ4 ||
F2FS_I(inode)->i_compress_algorithm == COMPRESS_ZSTD) &&
F2FS_OPTION(sbi).compress_level)
F2FS_I(inode)->i_compress_flag |=
F2FS_OPTION(sbi).compress_level <<
COMPRESS_LEVEL_OFFSET;
F2FS_I(inode)->i_compress_level =
F2FS_OPTION(sbi).compress_level;
F2FS_I(inode)->i_flags |= F2FS_COMPR_FL;
set_inode_flag(inode, FI_COMPRESSED_FILE);
stat_inc_compr_inode(inode);

16
fs/f2fs/inode.c
View File

@ -460,11 +460,17 @@ static int do_read_inode(struct inode *inode)
(fi->i_flags & F2FS_COMPR_FL)) {
if (F2FS_FITS_IN_INODE(ri, fi->i_extra_isize,
i_log_cluster_size)) {
unsigned short compress_flag;
atomic_set(&fi->i_compr_blocks,
le64_to_cpu(ri->i_compr_blocks));
fi->i_compress_algorithm = ri->i_compress_algorithm;
fi->i_log_cluster_size = ri->i_log_cluster_size;
fi->i_compress_flag = le16_to_cpu(ri->i_compress_flag);
compress_flag = le16_to_cpu(ri->i_compress_flag);
fi->i_compress_level = compress_flag >>
COMPRESS_LEVEL_OFFSET;
fi->i_compress_flag = compress_flag &
(BIT(COMPRESS_LEVEL_OFFSET) - 1);
fi->i_cluster_size = 1 << fi->i_log_cluster_size;
set_inode_flag(inode, FI_COMPRESSED_FILE);
}
@ -686,13 +692,17 @@ void f2fs_update_inode(struct inode *inode, struct page *node_page)
if (f2fs_sb_has_compression(F2FS_I_SB(inode)) &&
F2FS_FITS_IN_INODE(ri, F2FS_I(inode)->i_extra_isize,
i_log_cluster_size)) {
unsigned short compress_flag;
ri->i_compr_blocks =
cpu_to_le64(atomic_read(
&F2FS_I(inode)->i_compr_blocks));
ri->i_compress_algorithm =
F2FS_I(inode)->i_compress_algorithm;
ri->i_compress_flag =
cpu_to_le16(F2FS_I(inode)->i_compress_flag);
compress_flag = F2FS_I(inode)->i_compress_flag |
F2FS_I(inode)->i_compress_level <<
COMPRESS_LEVEL_OFFSET;
ri->i_compress_flag = cpu_to_le16(compress_flag);
ri->i_log_cluster_size =
F2FS_I(inode)->i_log_cluster_size;
}