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Message-Id: <20240207064302.221060-3-eugen.hristev@collabora.com>
Date: Wed, 7 Feb 2024 08:43:02 +0200
From: Eugen Hristev <eugen.hristev@...labora.com>
To: tytso@....edu,
jaegeuk@...nel.org,
linux-ext4@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net
Cc: chao@...nel.org,
adilger.kernel@...ger.ca,
linux-kernel@...r.kernel.org,
kernel@...labora.com,
eugen.hristev@...labora.com,
Gabriel Krisman Bertazi <krisman@...labora.com>,
Eric Biggers <ebiggers@...gle.com>
Subject: [RESEND PATCH v9 2/2] f2fs: Simplify the handling of cached insensitive names
From: Gabriel Krisman Bertazi <krisman@...labora.com>
Keeping it as qstr avoids the unnecessary conversion in f2fs_match
Reviewed-by: Eric Biggers <ebiggers@...gle.com>
Signed-off-by: Gabriel Krisman Bertazi <krisman@...labora.com>
[eugen.hristev@...labora.com: port to 6.8-rc3]
Signed-off-by: Eugen Hristev <eugen.hristev@...labora.com>
---
fs/f2fs/dir.c | 53 ++++++++++++++++++++++++++--------------------
fs/f2fs/f2fs.h | 17 ++++++++++++++-
fs/f2fs/recovery.c | 5 +----
3 files changed, 47 insertions(+), 28 deletions(-)
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index 3f20d94e12f9..f5b65cf36393 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -42,35 +42,49 @@ static unsigned int bucket_blocks(unsigned int level)
return 4;
}
+#if IS_ENABLED(CONFIG_UNICODE)
/* If @dir is casefolded, initialize @fname->cf_name from @fname->usr_fname. */
int f2fs_init_casefolded_name(const struct inode *dir,
struct f2fs_filename *fname)
{
-#if IS_ENABLED(CONFIG_UNICODE)
struct super_block *sb = dir->i_sb;
+ unsigned char *buf;
+ int len;
if (IS_CASEFOLDED(dir) &&
!is_dot_dotdot(fname->usr_fname->name, fname->usr_fname->len)) {
- fname->cf_name.name = f2fs_kmem_cache_alloc(f2fs_cf_name_slab,
- GFP_NOFS, false, F2FS_SB(sb));
- if (!fname->cf_name.name)
+ buf = f2fs_kmem_cache_alloc(f2fs_cf_name_slab,
+ GFP_NOFS, false, F2FS_SB(sb));
+ if (!buf)
return -ENOMEM;
- fname->cf_name.len = utf8_casefold(sb->s_encoding,
- fname->usr_fname,
- fname->cf_name.name,
- F2FS_NAME_LEN);
- if ((int)fname->cf_name.len <= 0) {
- kmem_cache_free(f2fs_cf_name_slab, fname->cf_name.name);
- fname->cf_name.name = NULL;
+
+ len = utf8_casefold(sb->s_encoding, fname->usr_fname,
+ buf, F2FS_NAME_LEN);
+ if (len <= 0) {
+ kmem_cache_free(f2fs_cf_name_slab, buf);
if (sb_has_strict_encoding(sb))
return -EINVAL;
/* fall back to treating name as opaque byte sequence */
+ return 0;
}
+ fname->cf_name.name = buf;
+ fname->cf_name.len = len;
}
-#endif
+
return 0;
}
+void f2fs_free_casefolded_name(struct f2fs_filename *fname)
+{
+ unsigned char *buf = (unsigned char *)fname->cf_name.name;
+
+ if (buf) {
+ kmem_cache_free(f2fs_cf_name_slab, buf);
+ fname->cf_name.name = NULL;
+ }
+}
+#endif /* CONFIG_UNICODE */
+
static int __f2fs_setup_filename(const struct inode *dir,
const struct fscrypt_name *crypt_name,
struct f2fs_filename *fname)
@@ -142,12 +156,7 @@ void f2fs_free_filename(struct f2fs_filename *fname)
kfree(fname->crypto_buf.name);
fname->crypto_buf.name = NULL;
#endif
-#if IS_ENABLED(CONFIG_UNICODE)
- if (fname->cf_name.name) {
- kmem_cache_free(f2fs_cf_name_slab, fname->cf_name.name);
- fname->cf_name.name = NULL;
- }
-#endif
+ f2fs_free_casefolded_name(fname);
}
static unsigned long dir_block_index(unsigned int level,
@@ -235,11 +244,9 @@ static inline int f2fs_match_name(const struct inode *dir,
struct fscrypt_name f;
#if IS_ENABLED(CONFIG_UNICODE)
- if (fname->cf_name.name) {
- struct qstr cf = FSTR_TO_QSTR(&fname->cf_name);
-
- return f2fs_match_ci_name(dir, &cf, de_name, de_name_len);
- }
+ if (fname->cf_name.name)
+ return f2fs_match_ci_name(dir, &fname->cf_name,
+ de_name, de_name_len);
#endif
f.usr_fname = fname->usr_fname;
f.disk_name = fname->disk_name;
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 84c9fead3ad4..2ff8e52642ec 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -530,7 +530,7 @@ struct f2fs_filename {
* internal operation where usr_fname is also NULL. In all these cases
* we fall back to treating the name as an opaque byte sequence.
*/
- struct fscrypt_str cf_name;
+ struct qstr cf_name;
#endif
};
@@ -3533,8 +3533,23 @@ int f2fs_get_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
/*
* dir.c
*/
+unsigned char f2fs_get_de_type(struct f2fs_dir_entry *de);
+#if IS_ENABLED(CONFIG_UNICODE)
int f2fs_init_casefolded_name(const struct inode *dir,
struct f2fs_filename *fname);
+void f2fs_free_casefolded_name(struct f2fs_filename *fname);
+#else
+static inline int f2fs_init_casefolded_name(const struct inode *dir,
+ struct f2fs_filename *fname)
+{
+ return 0;
+}
+
+static inline void f2fs_free_casefolded_name(struct f2fs_filename *fname)
+{
+}
+#endif /* CONFIG_UNICODE */
+
int f2fs_setup_filename(struct inode *dir, const struct qstr *iname,
int lookup, struct f2fs_filename *fname);
int f2fs_prepare_lookup(struct inode *dir, struct dentry *dentry,
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index aad1d1a9b3d6..8e8501a3a8e0 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -153,11 +153,8 @@ static int init_recovered_filename(const struct inode *dir,
if (err)
return err;
f2fs_hash_filename(dir, fname);
-#if IS_ENABLED(CONFIG_UNICODE)
/* Case-sensitive match is fine for recovery */
- kmem_cache_free(f2fs_cf_name_slab, fname->cf_name.name);
- fname->cf_name.name = NULL;
-#endif
+ f2fs_free_casefolded_name(fname);
} else {
f2fs_hash_filename(dir, fname);
}
--
2.34.1
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