diff mbox series

[v10,7/8] ext4: Move CONFIG_UNICODE defguards into the code flow

Message ID 20240215042654.359210-8-eugen.hristev@collabora.com
State Not Applicable
Headers show
Series [v10,1/8] ext4: Simplify the handling of cached insensitive names | expand

Commit Message

Eugen Hristev Feb. 15, 2024, 4:26 a.m. UTC 
From: Gabriel Krisman Bertazi <krisman@collabora.com>

Instead of a bunch of ifdefs, make the unicode built checks part of the
code flow where possible, as requested by Torvalds.

Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
[eugen.hristev@collabora.com: port to 6.8-rc3]
Signed-off-by: Eugen Hristev <eugen.hristev@collabora.com>
---
 fs/ext4/crypto.c | 19 +++----------------
 fs/ext4/ext4.h   | 33 +++++++++++++++++++++------------
 fs/ext4/namei.c  | 14 +++++---------
 fs/ext4/super.c  |  4 +---
 4 files changed, 30 insertions(+), 40 deletions(-)

Comments

Gabriel Krisman Bertazi March 22, 2024, 10:11 p.m. UTC | #1 
Eugen Hristev via Linux-f2fs-devel
<linux-f2fs-devel@lists.sourceforge.net> writes:

> From: Gabriel Krisman Bertazi <krisman@collabora.com>
>
> Instead of a bunch of ifdefs, make the unicode built checks part of the
> code flow where possible, as requested by Torvalds.
>
> Reviewed-by: Eric Biggers <ebiggers@google.com>
> Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
> [eugen.hristev@collabora.com: port to 6.8-rc3]
> Signed-off-by: Eugen Hristev <eugen.hristev@collabora.com>
> ---
>  fs/ext4/crypto.c | 19 +++----------------
>  fs/ext4/ext4.h   | 33 +++++++++++++++++++++------------
>  fs/ext4/namei.c  | 14 +++++---------
>  fs/ext4/super.c  |  4 +---
>  4 files changed, 30 insertions(+), 40 deletions(-)
>
> diff --git a/fs/ext4/crypto.c b/fs/ext4/crypto.c
> index 7ae0b61258a7..1d2f8b79529c 100644
> --- a/fs/ext4/crypto.c
> +++ b/fs/ext4/crypto.c
> @@ -31,12 +31,7 @@ int ext4_fname_setup_filename(struct inode *dir, const struct qstr *iname,
>  
>  	ext4_fname_from_fscrypt_name(fname, &name);
>  
> -#if IS_ENABLED(CONFIG_UNICODE)
> -	err = ext4_fname_setup_ci_filename(dir, iname, fname);
> -	if (err)
> -		ext4_fname_free_filename(fname);
> -#endif
> -	return err;
> +	return ext4_fname_setup_ci_filename(dir, iname, fname);

This shouldn't remove the error path.  It effectively reintroduces the
memory leak fixed by commit 7ca4b085f430 ("ext4: fix memory leaks in
ext4_fname_{setup_filename,prepare_lookup}").

This patch was only about inlining the codeguards, so it shouldn't be
changing the logic.

>  }
>  
>  int ext4_fname_prepare_lookup(struct inode *dir, struct dentry *dentry,
> @@ -51,12 +46,7 @@ int ext4_fname_prepare_lookup(struct inode *dir, struct dentry *dentry,
>  
>  	ext4_fname_from_fscrypt_name(fname, &name);
>  
> -#if IS_ENABLED(CONFIG_UNICODE)
> -	err = ext4_fname_setup_ci_filename(dir, &dentry->d_name, fname);
> -	if (err)
> -		ext4_fname_free_filename(fname);
> -#endif
> -	return err;
> +	return ext4_fname_setup_ci_filename(dir, &dentry->d_name, fname);
>  }

likewise
diff mbox series

Patch

diff --git a/fs/ext4/crypto.c b/fs/ext4/crypto.c
index 7ae0b61258a7..1d2f8b79529c 100644
--- a/fs/ext4/crypto.c
+++ b/fs/ext4/crypto.c
@@ -31,12 +31,7 @@  int ext4_fname_setup_filename(struct inode *dir, const struct qstr *iname,
 
 	ext4_fname_from_fscrypt_name(fname, &name);
 
-#if IS_ENABLED(CONFIG_UNICODE)
-	err = ext4_fname_setup_ci_filename(dir, iname, fname);
-	if (err)
-		ext4_fname_free_filename(fname);
-#endif
-	return err;
+	return ext4_fname_setup_ci_filename(dir, iname, fname);
 }
 
 int ext4_fname_prepare_lookup(struct inode *dir, struct dentry *dentry,
@@ -51,12 +46,7 @@  int ext4_fname_prepare_lookup(struct inode *dir, struct dentry *dentry,
 
 	ext4_fname_from_fscrypt_name(fname, &name);
 
-#if IS_ENABLED(CONFIG_UNICODE)
-	err = ext4_fname_setup_ci_filename(dir, &dentry->d_name, fname);
-	if (err)
-		ext4_fname_free_filename(fname);
-#endif
-	return err;
+	return ext4_fname_setup_ci_filename(dir, &dentry->d_name, fname);
 }
 
 void ext4_fname_free_filename(struct ext4_filename *fname)
@@ -70,10 +60,7 @@  void ext4_fname_free_filename(struct ext4_filename *fname)
 	fname->usr_fname = NULL;
 	fname->disk_name.name = NULL;
 
-#if IS_ENABLED(CONFIG_UNICODE)
-	kfree(fname->cf_name.name);
-	fname->cf_name.name = NULL;
-#endif
+	ext4_fname_free_ci_filename(fname);
 }
 
 static bool uuid_is_zero(__u8 u[16])
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 932bae88b4a7..18362054b59e 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2742,8 +2742,25 @@  ext4_fsblk_t ext4_inode_to_goal_block(struct inode *);
 
 #if IS_ENABLED(CONFIG_UNICODE)
 extern int ext4_fname_setup_ci_filename(struct inode *dir,
-					 const struct qstr *iname,
-					 struct ext4_filename *fname);
+					const struct qstr *iname,
+					struct ext4_filename *fname);
+
+static inline void ext4_fname_free_ci_filename(struct ext4_filename *fname)
+{
+	kfree(fname->cf_name.name);
+	fname->cf_name.name = NULL;
+}
+#else
+static inline int ext4_fname_setup_ci_filename(struct inode *dir,
+					       const struct qstr *iname,
+					       struct ext4_filename *fname)
+{
+	return 0;
+}
+
+static inline void ext4_fname_free_ci_filename(struct ext4_filename *fname)
+{
+}
 #endif
 
 /* ext4 encryption related stuff goes here crypto.c */
@@ -2766,16 +2783,11 @@  static inline int ext4_fname_setup_filename(struct inode *dir,
 					    int lookup,
 					    struct ext4_filename *fname)
 {
-	int err = 0;
 	fname->usr_fname = iname;
 	fname->disk_name.name = (unsigned char *) iname->name;
 	fname->disk_name.len = iname->len;
 
-#if IS_ENABLED(CONFIG_UNICODE)
-	err = ext4_fname_setup_ci_filename(dir, iname, fname);
-#endif
-
-	return err;
+	return ext4_fname_setup_ci_filename(dir, iname, fname);
 }
 
 static inline int ext4_fname_prepare_lookup(struct inode *dir,
@@ -2787,10 +2799,7 @@  static inline int ext4_fname_prepare_lookup(struct inode *dir,
 
 static inline void ext4_fname_free_filename(struct ext4_filename *fname)
 {
-#if IS_ENABLED(CONFIG_UNICODE)
-	kfree(fname->cf_name.name);
-	fname->cf_name.name = NULL;
-#endif
+	ext4_fname_free_ci_filename(fname);
 }
 
 static inline int ext4_ioctl_get_encryption_pwsalt(struct file *filp,
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 7d357c417475..822bd16f76fa 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1835,8 +1835,7 @@  static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi
 		}
 	}
 
-#if IS_ENABLED(CONFIG_UNICODE)
-	if (!inode && IS_CASEFOLDED(dir)) {
+	if (IS_ENABLED(CONFIG_UNICODE) && !inode && IS_CASEFOLDED(dir)) {
 		/* Eventually we want to call d_add_ci(dentry, NULL)
 		 * for negative dentries in the encoding case as
 		 * well.  For now, prevent the negative dentry
@@ -1844,7 +1843,7 @@  static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi
 		 */
 		return NULL;
 	}
-#endif
+
 	return d_splice_alias(inode, dentry);
 }
 
@@ -3174,16 +3173,14 @@  static int ext4_rmdir(struct inode *dir, struct dentry *dentry)
 	ext4_fc_track_unlink(handle, dentry);
 	retval = ext4_mark_inode_dirty(handle, dir);
 
-#if IS_ENABLED(CONFIG_UNICODE)
 	/* VFS negative dentries are incompatible with Encoding and
 	 * Case-insensitiveness. Eventually we'll want avoid
 	 * invalidating the dentries here, alongside with returning the
 	 * negative dentries at ext4_lookup(), when it is better
 	 * supported by the VFS for the CI case.
 	 */
-	if (IS_CASEFOLDED(dir))
+	if (IS_ENABLED(CONFIG_UNICODE) && IS_CASEFOLDED(dir))
 		d_invalidate(dentry);
-#endif
 
 end_rmdir:
 	brelse(bh);
@@ -3285,16 +3282,15 @@  static int ext4_unlink(struct inode *dir, struct dentry *dentry)
 		goto out_trace;
 
 	retval = __ext4_unlink(dir, &dentry->d_name, d_inode(dentry), dentry);
-#if IS_ENABLED(CONFIG_UNICODE)
+
 	/* VFS negative dentries are incompatible with Encoding and
 	 * Case-insensitiveness. Eventually we'll want avoid
 	 * invalidating the dentries here, alongside with returning the
 	 * negative dentries at ext4_lookup(), when it is  better
 	 * supported by the VFS for the CI case.
 	 */
-	if (IS_CASEFOLDED(dir))
+	if (IS_ENABLED(CONFIG_UNICODE) && IS_CASEFOLDED(dir))
 		d_invalidate(dentry);
-#endif
 
 out_trace:
 	trace_ext4_unlink_exit(dentry, retval);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 0f931d0c227d..933a9218c20c 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3609,14 +3609,12 @@  int ext4_feature_set_ok(struct super_block *sb, int readonly)
 		return 0;
 	}
 
-#if !IS_ENABLED(CONFIG_UNICODE)
-	if (ext4_has_feature_casefold(sb)) {
+	if (!IS_ENABLED(CONFIG_UNICODE) && ext4_has_feature_casefold(sb)) {
 		ext4_msg(sb, KERN_ERR,
 			 "Filesystem with casefold feature cannot be "
 			 "mounted without CONFIG_UNICODE");
 		return 0;
 	}
-#endif
 
 	if (readonly)
 		return 1;