linux-ext4 - [PATCH V3 9/9] fsverity: Move verity status check to fsverity_prepare

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Message-Id: <20181208065144.19486-10-chandan@linux.vnet.ibm.com>
Date:   Sat,  8 Dec 2018 12:21:44 +0530
From:   Chandan Rajendra <chandan@...ux.vnet.ibm.com>
To:     linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
        linux-doc@...r.kernel.org, linux-mips@...ux-mips.org,
        linux-s390@...r.kernel.org, linux-mtd@...ts.infradead.org,
        linux-fsdevel@...r.kernel.org
Cc:     Chandan Rajendra <chandan@...ux.vnet.ibm.com>, tytso@....edu,
        adilger.kernel@...ger.ca, ebiggers@...nel.org, jaegeuk@...nel.org,
        yuchao0@...wei.com, corbet@....net, ralf@...ux-mips.org,
        paul.burton@...s.com, jhogan@...nel.org, green.hu@...il.com,
        deanbo422@...il.com, schwidefsky@...ibm.com,
        heiko.carstens@...ibm.com, richard@....at, dedekind1@...il.com,
        adrian.hunter@...el.com, viro@...iv.linux.org.uk
Subject: [PATCH V3 9/9] fsverity: Move verity status check to fsverity_prepare_setattr

Instead of conditionally checking for verity status of an inode before
invoking fsverity_prepare_setattr(), this commit moves the check inside the
definition of fsverity_prepare_setattr().

Signed-off-by: Chandan Rajendra <chandan@...ux.vnet.ibm.com>
---
 fs/ext4/inode.c   | 8 +++-----
 fs/f2fs/file.c    | 8 +++-----
 fs/verity/setup.c | 2 +-
 3 files changed, 7 insertions(+), 11 deletions(-)

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 703f55635824..44561e68886b 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -5510,11 +5510,9 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
 	if (error)
 		return error;
 
-	if (IS_VERITY(inode)) {
-		error = fsverity_prepare_setattr(dentry, attr);
-		if (error)
-			return error;
-	}
+	error = fsverity_prepare_setattr(dentry, attr);
+	if (error)
+		return error;
 
 	if (is_quota_modification(inode, attr)) {
 		error = dquot_initialize(inode);
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 925c0d9608da..422907ca37c6 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -798,11 +798,9 @@ int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
 	if (err)
 		return err;
 
-	if (IS_VERITY(inode)) {
-		err = fsverity_prepare_setattr(dentry, attr);
-		if (err)
-			return err;
-	}
+	err = fsverity_prepare_setattr(dentry, attr);
+	if (err)
+		return err;
 
 	if (is_quota_modification(inode, attr)) {
 		err = dquot_initialize(inode);
diff --git a/fs/verity/setup.c b/fs/verity/setup.c
index bc463dc601b1..154556d72691 100644
--- a/fs/verity/setup.c
+++ b/fs/verity/setup.c
@@ -796,7 +796,7 @@ EXPORT_SYMBOL_GPL(fsverity_file_open);
  */
 int fsverity_prepare_setattr(struct dentry *dentry, struct iattr *attr)
 {
-	if (attr->ia_valid & ATTR_SIZE) {
+	if (IS_VERITY(d_inode(dentry)) && (attr->ia_valid & ATTR_SIZE)) {
 		pr_debug("Denying truncate of verity file (ino %lu)\n",
 			 d_inode(dentry)->i_ino);
 		return -EPERM;
-- 
2.19.1