Move the fsverity_info pointer into the filesystem-specific part of the
inode by adding the field ext4_inode_info::i_verity_info and configuring
fsverity_operations::inode_info_offs accordingly.
This is a prerequisite for a later commit that removes
inode::i_verity_info, saving memory and improving cache efficiency on
filesystems that don't support fsverity.
Co-developed-by: Christian Brauner <brauner@xxxxxxxxxx>
Signed-off-by: Christian Brauner <brauner@xxxxxxxxxx>
Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
---
fs/ext4/ext4.h | 4 ++++
fs/ext4/super.c | 3 +++
fs/ext4/verity.c | 2 ++
3 files changed, 9 insertions(+)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index c897109dadb15..6cb784a56b3ba 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1184,10 +1184,14 @@ struct ext4_inode_info {
kprojid_t i_projid;
#ifdef CONFIG_FS_ENCRYPTION
struct fscrypt_inode_info *i_crypt_info;
#endif
+
+#ifdef CONFIG_FS_VERITY
+ struct fsverity_info *i_verity_info;
+#endif
};
/*
* File system states
*/
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 0c3059ecce37c..46138a6cb32a3 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1471,10 +1471,13 @@ static void init_once(void *foo)
inode_init_once(&ei->vfs_inode);
ext4_fc_init_inode(&ei->vfs_inode);
#ifdef CONFIG_FS_ENCRYPTION
ei->i_crypt_info = NULL;
#endif
+#ifdef CONFIG_FS_VERITY
+ ei->i_verity_info = NULL;
+#endif
}
static int __init init_inodecache(void)
{
ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache",
diff --git a/fs/ext4/verity.c b/fs/ext4/verity.c
index d9203228ce979..b0acb0c503137 100644
--- a/fs/ext4/verity.c
+++ b/fs/ext4/verity.c
@@ -387,10 +387,12 @@ static int ext4_write_merkle_tree_block(struct inode *inode, const void *buf,
return pagecache_write(inode, buf, size, pos);
}
const struct fsverity_operations ext4_verityops = {
+ .inode_info_offs = (int)offsetof(struct ext4_inode_info, i_verity_info) -
+ (int)offsetof(struct ext4_inode_info, vfs_inode),
.begin_enable_verity = ext4_begin_enable_verity,
.end_enable_verity = ext4_end_enable_verity,
.get_verity_descriptor = ext4_get_verity_descriptor,
.read_merkle_tree_page = ext4_read_merkle_tree_page,
.write_merkle_tree_block = ext4_write_merkle_tree_block,
--
2.50.1
