linux-kernel - [PATCH v2 7/9] fs: Rename SB_I_EVM_UNSUPPORTED to SB_I_EVM_HMAC

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Date: Mon,  5 Feb 2024 13:25:04 -0500
From: Stefan Berger <stefanb@...ux.ibm.com>
To: linux-integrity@...r.kernel.org, linux-security-module@...r.kernel.org,
        linux-unionfs@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, paul@...l-moore.com, jmorris@...ei.org,
        serge@...lyn.com, zohar@...ux.ibm.com, roberto.sassu@...wei.com,
        amir73il@...il.com, brauner@...nel.org, miklos@...redi.hu,
        Stefan Berger <stefanb@...ux.ibm.com>
Subject: [PATCH v2 7/9] fs: Rename SB_I_EVM_UNSUPPORTED to SB_I_EVM_HMAC_UNSUPPORTED

Now that EVM supports RSA signatures for previously completely
unsupported filesystems rename the flag SB_I_EVM_UNSUPPORTED to
SB_I_EVM_HMAC_UNSUPPORTED to reflect that only HMAC is not supported.

Suggested-by: Amir Goldstein <amir73il@...il.com>
Suggested-by: Mimi Zohar <zohar@...ux.ibm.com>
Signed-off-by: Stefan Berger <stefanb@...ux.ibm.com>
---
 fs/overlayfs/super.c              | 2 +-
 include/linux/fs.h                | 2 +-
 security/integrity/evm/evm_main.c | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 460126b7e1cd..db132d437e14 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -1445,7 +1445,7 @@ int ovl_fill_super(struct super_block *sb, struct fs_context *fc)
 	 * lead to unexpected results.
 	 */
 	sb->s_iflags |= SB_I_NOUMASK;
-	sb->s_iflags |= SB_I_EVM_UNSUPPORTED;
+	sb->s_iflags |= SB_I_EVM_HMAC_UNSUPPORTED;
 
 	err = -ENOMEM;
 	root_dentry = ovl_get_root(sb, ctx->upper.dentry, oe);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 1823a93202bd..37306a09b4dc 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1177,7 +1177,7 @@ extern int send_sigurg(struct fown_struct *fown);
 #define SB_I_USERNS_VISIBLE		0x00000010 /* fstype already mounted */
 #define SB_I_IMA_UNVERIFIABLE_SIGNATURE	0x00000020
 #define SB_I_UNTRUSTED_MOUNTER		0x00000040
-#define SB_I_EVM_UNSUPPORTED		0x00000080
+#define SB_I_EVM_HMAC_UNSUPPORTED	0x00000080
 
 #define SB_I_SKIP_SYNC	0x00000100	/* Skip superblock at global sync */
 #define SB_I_PERSB_BDI	0x00000200	/* has a per-sb bdi */
diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c
index c3bd88aba78c..ff659e622f4a 100644
--- a/security/integrity/evm/evm_main.c
+++ b/security/integrity/evm/evm_main.c
@@ -155,7 +155,7 @@ static int is_unsupported_fs(struct dentry *dentry)
 {
 	struct inode *inode = d_backing_inode(dentry);
 
-	if (inode->i_sb->s_iflags & SB_I_EVM_UNSUPPORTED) {
+	if (inode->i_sb->s_iflags & SB_I_EVM_HMAC_UNSUPPORTED) {
 		pr_info_once("%s not supported\n", inode->i_sb->s_type->name);
 		return 1;
 	}
-- 
2.43.0