From: Gabriel Krisman Bertazi <krisman@suse.de>
To: Eugen Hristev <eugen.hristev@collabora.com>
Cc: tytso@mit.edu, adilger.kernel@dilger.ca,
linux-ext4@vger.kernel.org, jaegeuk@kernel.org,
chao@kernel.org, linux-f2fs-devel@lists.sourceforge.net,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
kernel@collabora.com, viro@zeniv.linux.org.uk,
brauner@kernel.org, jack@suse.cz,
Gabriel Krisman Bertazi <krisman@collabora.com>
Subject: Re: [PATCH v14 8/9] ext4: Move CONFIG_UNICODE defguards into the code flow
Date: Mon, 25 Mar 2024 12:26:37 -0400 [thread overview]
Message-ID: <87edbynupu.fsf@mailhost.krisman.be> (raw)
In-Reply-To: <20240320084622.46643-9-eugen.hristev@collabora.com> (Eugen Hristev's message of "Wed, 20 Mar 2024 10:46:21 +0200")
Eugen Hristev <eugen.hristev@collabora.com> 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.
>
> 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);
> }
Oops. I ended up replying to v10 but it still applies in the latest
version. copying it here for reference:
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);
> }
>
> 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 4061d11b9763..c68f48f706cd 100644
> --- a/fs/ext4/ext4.h
> +++ b/fs/ext4/ext4.h
> @@ -2740,8 +2740,25 @@ 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 */
> @@ -2764,16 +2781,11 @@ 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,
> @@ -2785,10 +2797,7 @@ 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 3268cf45d9db..a5d9e5b01015 100644
> --- a/fs/ext4/namei.c
> +++ b/fs/ext4/namei.c
> @@ -1834,8 +1834,7 @@ 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
> @@ -1843,7 +1842,7 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi
> */
> return NULL;
> }
> -#endif
> +
> return d_splice_alias(inode, dentry);
> }
>
> @@ -3173,16 +3172,14 @@ 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);
> @@ -3284,16 +3281,15 @@ 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 215b4614eb15..179083728b4b 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;
--
Gabriel Krisman Bertazi
next prev parent reply other threads:[~2024-03-25 16:26 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-20 8:46 [PATCH v14 0/9] Cache insensitive cleanup for ext4/f2fs Eugen Hristev
2024-03-20 8:46 ` [PATCH v14 1/9] ext4: Simplify the handling of cached insensitive names Eugen Hristev
2024-03-20 8:46 ` [PATCH v14 2/9] f2fs: " Eugen Hristev
2024-03-20 8:46 ` [PATCH v14 3/9] libfs: Introduce case-insensitive string comparison helper Eugen Hristev
2024-03-20 8:46 ` [PATCH v14 4/9] ext4: Reuse generic_ci_match for ci comparisons Eugen Hristev
2024-03-20 8:46 ` [PATCH v14 5/9] f2fs: " Eugen Hristev
2024-03-20 8:46 ` [PATCH v14 6/9] ext4: Log error when lookup of encoded dentry fails Eugen Hristev
2024-03-20 8:46 ` [PATCH v14 7/9] f2fs: " Eugen Hristev
2024-03-22 22:11 ` Gabriel Krisman Bertazi
2024-03-20 8:46 ` [PATCH v14 8/9] ext4: Move CONFIG_UNICODE defguards into the code flow Eugen Hristev
2024-03-25 16:26 ` Gabriel Krisman Bertazi [this message]
2024-03-20 8:46 ` [PATCH v14 9/9] f2fs: " Eugen Hristev
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87edbynupu.fsf@mailhost.krisman.be \
--to=krisman@suse.de \
--cc=adilger.kernel@dilger.ca \
--cc=brauner@kernel.org \
--cc=chao@kernel.org \
--cc=eugen.hristev@collabora.com \
--cc=jack@suse.cz \
--cc=jaegeuk@kernel.org \
--cc=kernel@collabora.com \
--cc=krisman@collabora.com \
--cc=linux-ext4@vger.kernel.org \
--cc=linux-f2fs-devel@lists.sourceforge.net \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=tytso@mit.edu \
--cc=viro@zeniv.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox