From f9004dbfff8a3fbbd7e2a88c8a4327c7f2f8e5b2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 31 Jan 2024 01:04:47 +0000
Subject: [PATCH] add driver 5G
---
kernel/include/linux/fsverity.h | 25 +++++++++++++++++++++----
1 files changed, 21 insertions(+), 4 deletions(-)
diff --git a/kernel/include/linux/fsverity.h b/kernel/include/linux/fsverity.h
index eb490bd..19c118e 100644
--- a/kernel/include/linux/fsverity.h
+++ b/kernel/include/linux/fsverity.h
@@ -115,8 +115,13 @@
static inline struct fsverity_info *fsverity_get_info(const struct inode *inode)
{
- /* pairs with the cmpxchg() in fsverity_set_info() */
- return READ_ONCE(inode->i_verity_info);
+ /*
+ * Pairs with the cmpxchg_release() in fsverity_set_info().
+ * I.e., another task may publish ->i_verity_info concurrently,
+ * executing a RELEASE barrier. We need to use smp_load_acquire() here
+ * to safely ACQUIRE the memory the other task published.
+ */
+ return smp_load_acquire(&inode->i_verity_info);
}
/* enable.c */
@@ -132,6 +137,10 @@
int fsverity_file_open(struct inode *inode, struct file *filp);
int fsverity_prepare_setattr(struct dentry *dentry, struct iattr *attr);
void fsverity_cleanup_inode(struct inode *inode);
+
+/* read_metadata.c */
+
+int fsverity_ioctl_read_metadata(struct file *filp, const void __user *uarg);
/* verify.c */
@@ -178,6 +187,14 @@
{
}
+/* read_metadata.c */
+
+static inline int fsverity_ioctl_read_metadata(struct file *filp,
+ const void __user *uarg)
+{
+ return -EOPNOTSUPP;
+}
+
/* verify.c */
static inline bool fsverity_verify_page(struct page *page)
@@ -218,11 +235,11 @@
#ifdef CONFIG_FS_VERITY_BUILTIN_SIGNATURES
int __fsverity_verify_signature(const struct inode *inode, const u8 *signature,
- u32 sig_size, const u8 *file_digest,
+ size_t sig_size, const u8 *file_digest,
unsigned int digest_algorithm);
#else /* !CONFIG_FS_VERITY_BUILTIN_SIGNATURES */
static inline int __fsverity_verify_signature(const struct inode *inode,
- const u8 *signature, u32 sig_size,
+ const u8 *signature, size_t sig_size,
const u8 *file_digest,
unsigned int digest_algorithm)
{
--
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