[PATCH v2 3/3] f2fs: remove unneeded pointer conversion

From: Chao Yu
Date: Tue Jan 26 2016 - 02:40:29 EST

There are redundant pointer conversion in following call stack:
- at position a, inode was been converted to f2fs_file_info.
- at position b, f2fs_file_info was been converted to inode again.

- truncate_blocks(inode,..)
- fi = F2FS_I(inode) ---a
- ADDRS_PER_PAGE(node_page, fi)
- addrs_per_inode(fi)
- inode = &fi->vfs_inode ---b
- f2fs_has_inline_xattr(inode)
- fi = F2FS_I(inode)
- is_inode_flag_set(fi,..)

In order to avoid unneeded conversion, alter ADDRS_PER_PAGE and
addrs_per_inode to acept parameter with type of inode pointer.

Signed-off-by: Chao Yu <chao2.yu@xxxxxxxxxxx>
---

V2:
- rebase on last dev-test.

fs/f2fs/data.c | 5 ++---
fs/f2fs/extent_cache.c | 5 ++---
fs/f2fs/f2fs.h | 14 +++++++-------
fs/f2fs/file.c | 11 +++++------
fs/f2fs/gc.c | 8 ++++----
fs/f2fs/node.c | 8 ++++----
fs/f2fs/recovery.c | 10 ++++------
include/linux/f2fs_fs.h | 6 +++---
8 files changed, 31 insertions(+), 36 deletions(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 2f8ecfe..0956219 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -498,7 +498,6 @@ got_it:
static int __allocate_data_block(struct dnode_of_data *dn)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
- struct f2fs_inode_info *fi = F2FS_I(dn->inode);
struct f2fs_summary sum;
struct node_info ni;
int seg = CURSEG_WARM_DATA;
@@ -526,7 +525,7 @@ alloc:
set_data_blkaddr(dn);

/* update i_size */
- fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) +
+ fofs = start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) +
dn->ofs_in_node;
if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_CACHE_SHIFT))
i_size_write(dn->inode,
@@ -593,7 +592,7 @@ next_dnode:
goto unlock_out;
}

- end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
+ end_offset = ADDRS_PER_PAGE(dn.node_page, inode);

next_block:
blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node);
diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c
index 7dbf691..4168207 100644
--- a/fs/f2fs/extent_cache.c
+++ b/fs/f2fs/extent_cache.c
@@ -700,7 +700,6 @@ bool f2fs_lookup_extent_cache(struct inode *inode, pgoff_t pgofs,

void f2fs_update_extent_cache(struct dnode_of_data *dn)
{
- struct f2fs_inode_info *fi = F2FS_I(dn->inode);
pgoff_t fofs;

if (!f2fs_may_extent_tree(dn->inode))
@@ -708,8 +707,8 @@ void f2fs_update_extent_cache(struct dnode_of_data *dn)

f2fs_bug_on(F2FS_I_SB(dn->inode), dn->data_blkaddr == NEW_ADDR);

- fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) +
- dn->ofs_in_node;
+ fofs = start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) +
+ dn->ofs_in_node;

if (f2fs_update_extent_tree_range(dn->inode, fofs, dn->data_blkaddr, 1))
sync_inode_page(dn);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 0bbbfed..4bcc512 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1528,9 +1528,9 @@ static inline int f2fs_has_inline_xattr(struct inode *inode)
return is_inode_flag_set(F2FS_I(inode), FI_INLINE_XATTR);
}

-static inline unsigned int addrs_per_inode(struct f2fs_inode_info *fi)
+static inline unsigned int addrs_per_inode(struct inode *inode)
{
- if (f2fs_has_inline_xattr(&fi->vfs_inode))
+ if (f2fs_has_inline_xattr(inode))
return DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS;
return DEF_ADDRS_PER_INODE;
}
@@ -1684,10 +1684,10 @@ static inline void *f2fs_kvzalloc(size_t size, gfp_t flags)
(F2FS_I(i)->i_acl_mode) : ((i)->i_mode))

/* get offset of first page in next direct node */
-#define PGOFS_OF_NEXT_DNODE(pgofs, fi) \
- ((pgofs < ADDRS_PER_INODE(fi)) ? ADDRS_PER_INODE(fi) : \
- (pgofs - ADDRS_PER_INODE(fi) + ADDRS_PER_BLOCK) / \
- ADDRS_PER_BLOCK * ADDRS_PER_BLOCK + ADDRS_PER_INODE(fi))
+#define PGOFS_OF_NEXT_DNODE(pgofs, inode) \
+ ((pgofs < ADDRS_PER_INODE(inode)) ? ADDRS_PER_INODE(inode) : \
+ (pgofs - ADDRS_PER_INODE(inode) + ADDRS_PER_BLOCK) / \
+ ADDRS_PER_BLOCK * ADDRS_PER_BLOCK + ADDRS_PER_INODE(inode))

/*
* file.c
@@ -1906,7 +1906,7 @@ int f2fs_release_page(struct page *, gfp_t);
*/
int start_gc_thread(struct f2fs_sb_info *);
void stop_gc_thread(struct f2fs_sb_info *);
-block_t start_bidx_of_node(unsigned int, struct f2fs_inode_info *);
+block_t start_bidx_of_node(unsigned int, struct inode *);
int f2fs_gc(struct f2fs_sb_info *, bool);
void build_gc_manager(struct f2fs_sb_info *);

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index b19617e..f2b14e3 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -358,15 +358,14 @@ static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
} else if (err == -ENOENT) {
/* direct node does not exists */
if (whence == SEEK_DATA) {
- pgofs = PGOFS_OF_NEXT_DNODE(pgofs,
- F2FS_I(inode));
+ pgofs = PGOFS_OF_NEXT_DNODE(pgofs, inode);
continue;
} else {
goto found;
}
}

- end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
+ end_offset = ADDRS_PER_PAGE(dn.node_page, inode);

/* find data/hole in dnode block */
for (; dn.ofs_in_node < end_offset;
@@ -480,7 +479,7 @@ int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
* we will invalidate all blkaddr in the whole range.
*/
fofs = start_bidx_of_node(ofs_of_node(dn->node_page),
- F2FS_I(dn->inode)) + ofs;
+ dn->inode) + ofs;
f2fs_update_extent_cache_range(dn, fofs, 0, len);
dec_valid_block_count(sbi, dn->inode, nr_free);
sync_inode_page(dn);
@@ -568,7 +567,7 @@ int truncate_blocks(struct inode *inode, u64 from, bool lock)
goto out;
}

- count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
+ count = ADDRS_PER_PAGE(dn.node_page, inode);

count -= dn.ofs_in_node;
f2fs_bug_on(sbi, count < 0);
@@ -768,7 +767,7 @@ int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
return err;
}

- end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
+ end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
count = min(end_offset - dn.ofs_in_node, pg_end - pg_start);

f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset);
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index d57245d..c958321 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -469,7 +469,7 @@ next_step:
* as indirect or double indirect node blocks, are given, it must be a caller's
* bug.
*/
-block_t start_bidx_of_node(unsigned int node_ofs, struct f2fs_inode_info *fi)
+block_t start_bidx_of_node(unsigned int node_ofs, struct inode *inode)
{
unsigned int indirect_blks = 2 * NIDS_PER_BLOCK + 4;
unsigned int bidx;
@@ -486,7 +486,7 @@ block_t start_bidx_of_node(unsigned int node_ofs, struct f2fs_inode_info *fi)
int dec = (node_ofs - indirect_blks - 3) / (NIDS_PER_BLOCK + 1);
bidx = node_ofs - 5 - dec;
}
- return bidx * ADDRS_PER_BLOCK + ADDRS_PER_INODE(fi);
+ return bidx * ADDRS_PER_BLOCK + ADDRS_PER_INODE(inode);
}

static bool is_alive(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
@@ -705,7 +705,7 @@ next_step:
continue;
}

- start_bidx = start_bidx_of_node(nofs, F2FS_I(inode));
+ start_bidx = start_bidx_of_node(nofs, inode);
data_page = get_read_data_page(inode,
start_bidx + ofs_in_node, READA, true);
if (IS_ERR(data_page)) {
@@ -721,7 +721,7 @@ next_step:
/* phase 3 */
inode = find_gc_inode(gc_list, dni.ino);
if (inode) {
- start_bidx = start_bidx_of_node(nofs, F2FS_I(inode))
+ start_bidx = start_bidx_of_node(nofs, inode)
+ ofs_in_node;
if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode))
move_encrypted_block(inode, start_bidx);
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 94a6755..97a4695 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -407,10 +407,10 @@ cache:
* The maximum depth is four.
* Offset[0] will have raw inode offset.
*/
-static int get_node_path(struct f2fs_inode_info *fi, long block,
+static int get_node_path(struct inode *inode, long block,
int offset[4], unsigned int noffset[4])
{
- const long direct_index = ADDRS_PER_INODE(fi);
+ const long direct_index = ADDRS_PER_INODE(inode);
const long direct_blks = ADDRS_PER_BLOCK;
const long dptrs_per_blk = NIDS_PER_BLOCK;
const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK;
@@ -498,7 +498,7 @@ int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode)
int level, i;
int err = 0;

- level = get_node_path(F2FS_I(dn->inode), index, offset, noffset);
+ level = get_node_path(dn->inode, index, offset, noffset);

nids[0] = dn->inode->i_ino;
npage[0] = dn->inode_page;
@@ -792,7 +792,7 @@ int truncate_inode_blocks(struct inode *inode, pgoff_t from)

trace_f2fs_truncate_inode_blocks_enter(inode, from);

- level = get_node_path(F2FS_I(inode), from, offset, noffset);
+ level = get_node_path(inode, from, offset, noffset);
restart:
page = get_node_page(sbi, inode->i_ino);
if (IS_ERR(page)) {
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index 5a8fd4a..5045dd6 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -350,8 +350,7 @@ got_it:
inode = dn->inode;
}

- bidx = start_bidx_of_node(offset, F2FS_I(inode)) +
- le16_to_cpu(sum.ofs_in_node);
+ bidx = start_bidx_of_node(offset, inode) + le16_to_cpu(sum.ofs_in_node);

/*
* if inode page is locked, unlock temporarily, but its reference
@@ -386,10 +385,9 @@ truncate_out:
static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
struct page *page, block_t blkaddr)
{
- struct f2fs_inode_info *fi = F2FS_I(inode);
- unsigned int start, end;
struct dnode_of_data dn;
struct node_info ni;
+ unsigned int start, end;
int err = 0, recovered = 0;

/* step 1: recover xattr */
@@ -409,8 +407,8 @@ static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
goto out;

/* step 3: recover data indices */
- start = start_bidx_of_node(ofs_of_node(page), fi);
- end = start + ADDRS_PER_PAGE(page, fi);
+ start = start_bidx_of_node(ofs_of_node(page), inode);
+ end = start + ADDRS_PER_PAGE(page, inode);

set_new_dnode(&dn, inode, NULL, NULL, 0);

diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h
index e59c3be..f4c266c 100644
--- a/include/linux/f2fs_fs.h
+++ b/include/linux/f2fs_fs.h
@@ -170,12 +170,12 @@ struct f2fs_extent {
#define F2FS_INLINE_XATTR_ADDRS 50 /* 200 bytes for inline xattrs */
#define DEF_ADDRS_PER_INODE 923 /* Address Pointers in an Inode */
#define DEF_NIDS_PER_INODE 5 /* Node IDs in an Inode */
-#define ADDRS_PER_INODE(fi) addrs_per_inode(fi)
+#define ADDRS_PER_INODE(inode) addrs_per_inode(inode)
#define ADDRS_PER_BLOCK 1018 /* Address Pointers in a Direct Block */
#define NIDS_PER_BLOCK 1018 /* Node IDs in an Indirect Block */

-#define ADDRS_PER_PAGE(page, fi) \
- (IS_INODE(page) ? ADDRS_PER_INODE(fi) : ADDRS_PER_BLOCK)
+#define ADDRS_PER_PAGE(page, inode) \
+ (IS_INODE(page) ? ADDRS_PER_INODE(inode) : ADDRS_PER_BLOCK)

#define NODE_DIR1_BLOCK (DEF_ADDRS_PER_INODE + 1)
#define NODE_DIR2_BLOCK (DEF_ADDRS_PER_INODE + 2)
--
2.7.0.2.g1b0b6dd