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Date: Fri, 11 Jun 2021 07:46:30 +0800
From: Chao Yu <chao@...nel.org>
To: jaegeuk@...nel.org
Cc: linux-f2fs-devel@...ts.sourceforge.net,
linux-kernel@...r.kernel.org, Chao Yu <yuchao0@...wei.com>,
Eric Biggers <ebiggers@...gle.com>
Subject: [PATCH v3] f2fs: introduce f2fs_casefolded_name slab cache
From: Chao Yu <yuchao0@...wei.com>
Add a slab cache: "f2fs_casefolded_name" for memory allocation
of casefold name.
Reviewed-by: Eric Biggers <ebiggers@...gle.com>
Signed-off-by: Chao Yu <yuchao0@...wei.com>
---
v3:
- change "f2fs_casefold_name" to "f2fs_casefolded_name" in commit
title and message.
fs/f2fs/dir.c | 17 +++++++++++------
fs/f2fs/recovery.c | 6 +++++-
fs/f2fs/super.c | 24 ++++++++++++++++++++++++
3 files changed, 40 insertions(+), 7 deletions(-)
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index 96dcc4aca639..456651682daf 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -16,6 +16,10 @@
#include "xattr.h"
#include <trace/events/f2fs.h>
+#ifdef CONFIG_UNICODE
+extern struct kmem_cache *f2fs_cf_name_slab;
+#endif
+
static unsigned long dir_blocks(struct inode *inode)
{
return ((unsigned long long) (i_size_read(inode) + PAGE_SIZE - 1))
@@ -77,11 +81,10 @@ int f2fs_init_casefolded_name(const struct inode *dir,
{
#ifdef CONFIG_UNICODE
struct super_block *sb = dir->i_sb;
- struct f2fs_sb_info *sbi = F2FS_SB(sb);
if (IS_CASEFOLDED(dir)) {
- fname->cf_name.name = f2fs_kmalloc(sbi, F2FS_NAME_LEN,
- GFP_NOFS);
+ fname->cf_name.name = kmem_cache_alloc(f2fs_cf_name_slab,
+ GFP_NOFS);
if (!fname->cf_name.name)
return -ENOMEM;
fname->cf_name.len = utf8_casefold(sb->s_encoding,
@@ -89,7 +92,7 @@ int f2fs_init_casefolded_name(const struct inode *dir,
fname->cf_name.name,
F2FS_NAME_LEN);
if ((int)fname->cf_name.len <= 0) {
- kfree(fname->cf_name.name);
+ kmem_cache_free(f2fs_cf_name_slab, fname->cf_name.name);
fname->cf_name.name = NULL;
if (sb_has_strict_encoding(sb))
return -EINVAL;
@@ -172,8 +175,10 @@ void f2fs_free_filename(struct f2fs_filename *fname)
fname->crypto_buf.name = NULL;
#endif
#ifdef CONFIG_UNICODE
- kfree(fname->cf_name.name);
- fname->cf_name.name = NULL;
+ if (fname->cf_name.name) {
+ kmem_cache_free(f2fs_cf_name_slab, fname->cf_name.name);
+ fname->cf_name.name = NULL;
+ }
#endif
}
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index 4cfe36fa41be..76e62771433c 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -45,6 +45,10 @@
static struct kmem_cache *fsync_entry_slab;
+#ifdef CONFIG_UNICODE
+extern struct kmem_cache *f2fs_cf_name_slab;
+#endif
+
bool f2fs_space_for_roll_forward(struct f2fs_sb_info *sbi)
{
s64 nalloc = percpu_counter_sum_positive(&sbi->alloc_valid_block_count);
@@ -145,7 +149,7 @@ static int init_recovered_filename(const struct inode *dir,
f2fs_hash_filename(dir, fname);
#ifdef CONFIG_UNICODE
/* Case-sensitive match is fine for recovery */
- kfree(fname->cf_name.name);
+ kmem_cache_free(f2fs_cf_name_slab, fname->cf_name.name);
fname->cf_name.name = NULL;
#endif
} else {
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 9089303f7f8c..999fbe3a8d8f 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -277,6 +277,24 @@ static int f2fs_sb_read_encoding(const struct f2fs_super_block *sb,
return 0;
}
+
+struct kmem_cache *f2fs_cf_name_slab;
+static int __init f2fs_create_casefold_cache(void)
+{
+ f2fs_cf_name_slab = f2fs_kmem_cache_create("f2fs_casefolded_name",
+ F2FS_NAME_LEN);
+ if (!f2fs_cf_name_slab)
+ return -ENOMEM;
+ return 0;
+}
+
+static void f2fs_destroy_casefold_cache(void)
+{
+ kmem_cache_destroy(f2fs_cf_name_slab);
+}
+#else
+static int __init f2fs_create_casefold_cache(void) { return 0; }
+static void f2fs_destroy_casefold_cache(void) { }
#endif
static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
@@ -4316,7 +4334,12 @@ static int __init init_f2fs_fs(void)
err = f2fs_init_compress_cache();
if (err)
goto free_compress_mempool;
+ err = f2fs_create_casefold_cache();
+ if (err)
+ goto free_compress_cache;
return 0;
+free_compress_cache:
+ f2fs_destroy_compress_cache();
free_compress_mempool:
f2fs_destroy_compress_mempool();
free_bioset:
@@ -4352,6 +4375,7 @@ static int __init init_f2fs_fs(void)
static void __exit exit_f2fs_fs(void)
{
+ f2fs_destroy_casefold_cache();
f2fs_destroy_compress_cache();
f2fs_destroy_compress_mempool();
f2fs_destroy_bioset();
--
2.22.1
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