[PATCH 5/6] f2fs: allocate the extent_cache by default

Jaegeuk Kim
2022-12-05T18:55:16Z

Let's allocate it to remove the runtime complexity.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
fs/f2fs/extent_cache.c | 38 +++++++++++++++++++-------------------
fs/f2fs/f2fs.h | 3 ++-
fs/f2fs/inode.c | 6 ++++--
fs/f2fs/namei.c | 4 ++--
4 files changed, 27 insertions(+), 24 deletions(-)

diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c
index 654a14ab8977..305f969e3ad1 100644
--- a/fs/f2fs/extent_cache.c
+++ b/fs/f2fs/extent_cache.c
@@ -47,20 +47,23 @@ static bool __may_read_extent_tree(struct inode *inode)
return S_ISREG(inode->i_mode);
}

-static bool __may_extent_tree(struct inode *inode, enum extent_type type)
+static bool __init_may_extent_tree(struct inode *inode, enum extent_type type)
{
- struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ if (type == EX_READ)
+ return __may_read_extent_tree(inode);
+ return false;
+}

+static bool __may_extent_tree(struct inode *inode, enum extent_type type)
+{
/*
* for recovered files during mount do not create extents
* if shrinker is not registered.
*/
- if (list_empty(&sbi->s_list))
+ if (list_empty(&F2FS_I_SB(inode)->s_list))
return false;

- if (type == EX_READ)
- return __may_read_extent_tree(inode);
- return false;
+ return __init_may_extent_tree(inode, type);
}

static void __try_update_largest_extent(struct extent_tree *et,
@@ -439,20 +442,18 @@ static void __drop_largest_extent(struct extent_tree *et,
}
}

-/* return true, if inode page is changed */
-static void __f2fs_init_extent_tree(struct inode *inode, struct page *ipage,
- enum extent_type type)
+void f2fs_init_read_extent_tree(struct inode *inode, struct page *ipage)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
- struct extent_tree_info *eti = &sbi->extent_tree[type];
- struct f2fs_extent *i_ext = ipage ? &F2FS_INODE(ipage)->i_ext : NULL;
+ struct extent_tree_info *eti = &sbi->extent_tree[EX_READ];
+ struct f2fs_extent *i_ext = &F2FS_INODE(ipage)->i_ext;
struct extent_tree *et;
struct extent_node *en;
struct extent_info ei;

- if (!__may_extent_tree(inode, type)) {
+ if (!__may_extent_tree(inode, EX_READ)) {
/* drop largest read extent */
- if (type == EX_READ && i_ext && i_ext->len) {
+ if (i_ext && i_ext->len) {
f2fs_wait_on_page_writeback(ipage, NODE, true, true);
i_ext->len = 0;
set_page_dirty(ipage);
@@ -460,13 +461,11 @@ static void __f2fs_init_extent_tree(struct inode *inode, struct page *ipage,
goto out;
}

- et = __grab_extent_tree(inode, type);
+ et = __grab_extent_tree(inode, EX_READ);

if (!i_ext || !i_ext->len)
goto out;

- BUG_ON(type != EX_READ);
-
get_read_extent_info(&ei, i_ext);

write_lock(&et->lock);
@@ -486,14 +485,15 @@ static void __f2fs_init_extent_tree(struct inode *inode, struct page *ipage,
unlock_out:
write_unlock(&et->lock);
out:
- if (type == EX_READ && !F2FS_I(inode)->extent_tree[EX_READ])
+ if (!F2FS_I(inode)->extent_tree[EX_READ])
set_inode_flag(inode, FI_NO_EXTENT);
}

-void f2fs_init_extent_tree(struct inode *inode, struct page *ipage)
+void f2fs_init_extent_tree(struct inode *inode)
{
/* initialize read cache */
- __f2fs_init_extent_tree(inode, ipage, EX_READ);
+ if (__init_may_extent_tree(inode, EX_READ))
+ __grab_extent_tree(inode, EX_READ);
}

static bool __lookup_extent_tree(struct inode *inode, pgoff_t pgofs,
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 003b04b10109..ff940cba4600 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -4150,7 +4150,7 @@ struct rb_entry *f2fs_lookup_rb_tree_ret(struct rb_root_cached *root,
bool force, bool *leftmost);
bool f2fs_check_rb_tree_consistence(struct f2fs_sb_info *sbi,
struct rb_root_cached *root, bool check_key);
-void f2fs_init_extent_tree(struct inode *inode, struct page *ipage);
+void f2fs_init_extent_tree(struct inode *inode);
void f2fs_drop_extent_tree(struct inode *inode);
void f2fs_destroy_extent_node(struct inode *inode);
void f2fs_destroy_extent_tree(struct inode *inode);
@@ -4159,6 +4159,7 @@ int __init f2fs_create_extent_cache(void);
void f2fs_destroy_extent_cache(void);

/* read extent cache ops */
+void f2fs_init_read_extent_tree(struct inode *inode, struct page *ipage);
bool f2fs_lookup_read_extent_cache(struct inode *inode, pgoff_t pgofs,
struct extent_info *ei);
void f2fs_update_read_extent_cache(struct dnode_of_data *dn);
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index 086f201f15a0..c845c16f97d0 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -392,8 +392,6 @@ static int do_read_inode(struct inode *inode)
fi->i_pino = le32_to_cpu(ri->i_pino);
fi->i_dir_level = ri->i_dir_level;

- f2fs_init_extent_tree(inode, node_page);
-
get_inline_info(inode, ri);

fi->i_extra_isize = f2fs_has_extra_attr(inode) ?
@@ -479,6 +477,10 @@ static int do_read_inode(struct inode *inode)
}

init_idisk_time(inode);
+
+ /* Need all the flag bits */
+ f2fs_init_read_extent_tree(inode, node_page);
+
f2fs_put_page(node_page, 1);

stat_inc_inline_xattr(inode);
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 58a91ce8fe08..46de782c2baa 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -284,8 +284,6 @@ static struct inode *f2fs_new_inode(struct user_namespace *mnt_userns,
}
F2FS_I(inode)->i_inline_xattr_size = xattr_size;

- f2fs_init_extent_tree(inode, NULL);
-
F2FS_I(inode)->i_flags =
f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED);

@@ -311,6 +309,8 @@ static struct inode *f2fs_new_inode(struct user_namespace *mnt_userns,

f2fs_set_inode_flags(inode);

+ f2fs_init_extent_tree(inode);
+
trace_f2fs_new_inode(inode, 0);
return inode;

--
2.39.0.rc0.267.gcb52ba06e7-goog