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Message-Id: <20220519204645.16528-8-krisman@collabora.com>
Date: Thu, 19 May 2022 16:46:44 -0400
From: Gabriel Krisman Bertazi <krisman@...labora.com>
To: tytso@....edu, adilger.kernel@...ger.ca, jaegeuk@...nel.org,
ebiggers@...nel.org
Cc: linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
Gabriel Krisman Bertazi <krisman@...labora.com>,
kernel@...labora.com, Eric Biggers <ebiggers@...gle.com>
Subject: [PATCH v7 7/8] ext4: Move CONFIG_UNICODE defguards into the code flow
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@...gle.com>
Signed-off-by: Gabriel Krisman Bertazi <krisman@...labora.com>
---
Changes since v5:
- Drop err variable (eric)
Changes since v4:
- Create stub for !CONFIG_UNICODE case (eric)
---
fs/ext4/ext4.h | 47 +++++++++++++++++++++++------------------------
fs/ext4/namei.c | 15 ++++++---------
fs/ext4/super.c | 4 +---
3 files changed, 30 insertions(+), 36 deletions(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 93a28fcb2e22..4bc3649e3385 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
@@ -2758,10 +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;
+ return ext4_fname_setup_ci_filename(dir, iname, fname);
}
static inline int ext4_fname_prepare_lookup(struct inode *dir,
@@ -2777,10 +2790,7 @@ 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;
+ return ext4_fname_setup_ci_filename(dir, &dentry->d_name, fname);
}
static inline void ext4_fname_free_filename(struct ext4_filename *fname)
@@ -2794,10 +2804,7 @@ 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,
@@ -2805,16 +2812,11 @@ 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,
@@ -2826,10 +2828,7 @@ 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 f4593dc3e593..ce1133738f40 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1765,8 +1765,7 @@ 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
@@ -1774,7 +1773,7 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi
*/
return NULL;
}
-#endif
+
return d_splice_alias(inode, dentry);
}
@@ -3091,16 +3090,14 @@ 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);
@@ -3196,16 +3193,16 @@ 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;
--
2.36.1
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