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Code Issues Releases Wiki Activity

f2fs: compress: clean up parameter of __f2fs_cluster_blocks()

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Previously, in order to reuse __f2fs_cluster_blocks(),
f2fs_is_compressed_cluster() assigned a compress_ctx type variable,
which is used to pass few parameters (cc.inode, cc.cluster_size,
cc.cluster_idx), it's wasteful to allocate such large space in stack.

Let's clean up parameters of __f2fs_cluster_blocks() to avoid that.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2021-05-12 17:52:57 +08:00 committed by Jaegeuk Kim
parent fbec3b963a
commit 91f0fb6903
1 changed files with 13 additions and 20 deletions
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33
fs/f2fs/compress.c
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@ -892,14 +892,17 @@ static bool cluster_has_invalid_data(struct compress_ctx *cc)
return false;
}
static int __f2fs_cluster_blocks(struct compress_ctx *cc, bool compr)
static int __f2fs_cluster_blocks(struct inode *inode,
unsigned int cluster_idx, bool compr)
{
struct dnode_of_data dn;
unsigned int cluster_size = F2FS_I(inode)->i_cluster_size;
unsigned int start_idx = cluster_idx <<
F2FS_I(inode)->i_log_cluster_size;
int ret;
set_new_dnode(&dn, cc->inode, NULL, NULL, 0);
ret = f2fs_get_dnode_of_data(&dn, start_idx_of_cluster(cc),
LOOKUP_NODE);
set_new_dnode(&dn, inode, NULL, NULL, 0);
ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);
if (ret) {
if (ret == -ENOENT)
ret = 0;
@ -910,7 +913,7 @@ static int __f2fs_cluster_blocks(struct compress_ctx *cc, bool compr)
int i;
ret = 1;
for (i = 1; i < cc->cluster_size; i++) {
for (i = 1; i < cluster_size; i++) {
block_t blkaddr;
blkaddr = data_blkaddr(dn.inode,
@ -932,25 +935,15 @@ static int __f2fs_cluster_blocks(struct compress_ctx *cc, bool compr)
/* return # of compressed blocks in compressed cluster */
static int f2fs_compressed_blocks(struct compress_ctx *cc)
{
return __f2fs_cluster_blocks(cc, true);
return __f2fs_cluster_blocks(cc->inode, cc->cluster_idx, true);
}
/* return # of valid blocks in compressed cluster */
static int f2fs_cluster_blocks(struct compress_ctx *cc)
{
return __f2fs_cluster_blocks(cc, false);
}
int f2fs_is_compressed_cluster(struct inode *inode, pgoff_t index)
{
struct compress_ctx cc = {
.inode = inode,
.log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
.cluster_size = F2FS_I(inode)->i_cluster_size,
.cluster_idx = index >> F2FS_I(inode)->i_log_cluster_size,
};
return f2fs_cluster_blocks(&cc);
return __f2fs_cluster_blocks(inode,
index >> F2FS_I(inode)->i_log_cluster_size,
false);
}
static bool cluster_may_compress(struct compress_ctx *cc)
@ -1001,7 +994,7 @@ static int prepare_compress_overwrite(struct compress_ctx *cc,
bool prealloc;
retry:
ret = f2fs_cluster_blocks(cc);
ret = f2fs_is_compressed_cluster(cc->inode, start_idx);
if (ret <= 0)
return ret;