diff mbox series

[v5,7/8] ext4: Move CONFIG_UNICODE defguards into the code flow

Message ID 20220518172320.333617-8-krisman@collabora.com
State Superseded
Headers show
Series Clean up the case-insensitive lookup path | expand

Commit Message

Gabriel Krisman Bertazi May 18, 2022, 5:23 p.m. UTC 
Instead of a bunch of ifdefs, make the unicode built checks part of the
code flow where possible, as requested by Torvalds.

Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>

---
Changes since v4:
  - Create stub for !CONFIG_UNICODE case (eric)
---
 fs/ext4/ext4.h  | 37 ++++++++++++++++++++-----------------
 fs/ext4/namei.c | 15 ++++++---------
 fs/ext4/super.c |  4 +---
 3 files changed, 27 insertions(+), 29 deletions(-)

Comments

Eric Biggers May 18, 2022, 7:25 p.m. UTC | #1 
On Wed, May 18, 2022 at 01:23:19PM -0400, Gabriel Krisman Bertazi wrote:
> Instead of a bunch of ifdefs, make the unicode built checks part of the
> code flow where possible, as requested by Torvalds.
> 
> Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
> 
> ---
> Changes since v4:
>   - Create stub for !CONFIG_UNICODE case (eric)
> ---
>  fs/ext4/ext4.h  | 37 ++++++++++++++++++++-----------------
>  fs/ext4/namei.c | 15 ++++++---------
>  fs/ext4/super.c |  4 +---
>  3 files changed, 27 insertions(+), 29 deletions(-)
> 
> diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
> index 93a28fcb2e22..c38999ee3627 100644
> --- a/fs/ext4/ext4.h
> +++ b/fs/ext4/ext4.h
> @@ -2727,8 +2727,24 @@ 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
>  
>  #ifdef CONFIG_FS_ENCRYPTION
> @@ -2758,9 +2774,7 @@ static inline int ext4_fname_setup_filename(struct inode *dir,
>  
>  	ext4_fname_from_fscrypt_name(fname, &name);
>  
> -#if IS_ENABLED(CONFIG_UNICODE)
>  	err = ext4_fname_setup_ci_filename(dir, iname, fname);
> -#endif
>  	return err;
>  }

This can just do 'return ext4_fname_setup_ci_filename(...)'.  No need for the
err variable.

>  
> @@ -2777,9 +2791,7 @@ static inline int ext4_fname_prepare_lookup(struct inode *dir,
>  
>  	ext4_fname_from_fscrypt_name(fname, &name);
>  
> -#if IS_ENABLED(CONFIG_UNICODE)
>  	err = ext4_fname_setup_ci_filename(dir, &dentry->d_name, fname);
> -#endif
>  	return err;
>  }

Similarly, this can just return ext4_fname_setup_ci_filename(...).

>  
> @@ -2794,10 +2806,7 @@ static inline 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);
>  }
>  #else /* !CONFIG_FS_ENCRYPTION */
>  static inline int ext4_fname_setup_filename(struct inode *dir,
> @@ -2810,10 +2819,7 @@ static inline int ext4_fname_setup_filename(struct inode *dir,
>  	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;

Likewise.

- Eric
diff mbox series

Patch

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 93a28fcb2e22..c38999ee3627 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2727,8 +2727,24 @@  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
 
 #ifdef CONFIG_FS_ENCRYPTION
@@ -2758,9 +2774,7 @@  static inline int ext4_fname_setup_filename(struct inode *dir,
 
 	ext4_fname_from_fscrypt_name(fname, &name);
 
-#if IS_ENABLED(CONFIG_UNICODE)
 	err = ext4_fname_setup_ci_filename(dir, iname, fname);
-#endif
 	return err;
 }
 
@@ -2777,9 +2791,7 @@  static inline int ext4_fname_prepare_lookup(struct inode *dir,
 
 	ext4_fname_from_fscrypt_name(fname, &name);
 
-#if IS_ENABLED(CONFIG_UNICODE)
 	err = ext4_fname_setup_ci_filename(dir, &dentry->d_name, fname);
-#endif
 	return err;
 }
 
@@ -2794,10 +2806,7 @@  static inline 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);
 }
 #else /* !CONFIG_FS_ENCRYPTION */
 static inline int ext4_fname_setup_filename(struct inode *dir,
@@ -2810,10 +2819,7 @@  static inline int ext4_fname_setup_filename(struct inode *dir,
 	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;
 }
 
@@ -2826,10 +2832,7 @@  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);
 }
 #endif /* !CONFIG_FS_ENCRYPTION */
 
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 8fbb35187f72..f142c8fef750 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1755,8 +1755,7 @@  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
@@ -1764,7 +1763,7 @@  static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi
 		 */
 		return NULL;
 	}
-#endif
+
 	return d_splice_alias(inode, dentry);
 }
 
@@ -3081,16 +3080,14 @@  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);
@@ -3186,16 +3183,16 @@  static int ext4_unlink(struct inode *dir, struct dentry *dentry)
 	retval = __ext4_unlink(handle, dir, &dentry->d_name, d_inode(dentry));
 	if (!retval)
 		ext4_fc_track_unlink(handle, 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
+
 	if (handle)
 		ext4_journal_stop(handle);
 
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 1847b46af808..fa0004459dd6 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3645,14 +3645,12 @@  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;