summaryrefslogtreecommitdiff
path: root/fs/ubifs/crypto.c
diff options
context:
space:
mode:
authorRichard Weinberger <richard@nod.at>2016-10-20 16:47:56 +0200
committerRichard Weinberger <richard@nod.at>2016-12-12 23:07:38 +0100
commitd475a507457b5cafa428871a473d0dcc828c5f68 (patch)
tree7f6608195cfc421e6d3d7975cc8b916a55e4a914 /fs/ubifs/crypto.c
parent6a5e98ab7d8665d2faddbd91a8a2bf9addb79aff (diff)
ubifs: Add skeleton for fscrypto
This is the first building block to provide file level encryption on UBIFS. Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'fs/ubifs/crypto.c')
-rw-r--r--fs/ubifs/crypto.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/fs/ubifs/crypto.c b/fs/ubifs/crypto.c
new file mode 100644
index 000000000000..12a0072bddd3
--- /dev/null
+++ b/fs/ubifs/crypto.c
@@ -0,0 +1,46 @@
+#include "ubifs.h"
+
+static int ubifs_crypt_get_context(struct inode *inode, void *ctx, size_t len)
+{
+ return ubifs_xattr_get(inode, UBIFS_XATTR_NAME_ENCRYPTION_CONTEXT,
+ ctx, len);
+}
+
+static int ubifs_crypt_set_context(struct inode *inode, const void *ctx,
+ size_t len, void *fs_data)
+{
+ return ubifs_xattr_set(inode, UBIFS_XATTR_NAME_ENCRYPTION_CONTEXT,
+ ctx, len, 0);
+}
+
+static bool ubifs_crypt_empty_dir(struct inode *inode)
+{
+ return ubifs_check_dir_empty(inode) == 0;
+}
+
+static unsigned int ubifs_crypt_max_namelen(struct inode *inode)
+{
+ if (S_ISLNK(inode->i_mode))
+ return UBIFS_MAX_INO_DATA;
+ else
+ return UBIFS_MAX_NLEN;
+}
+
+static int ubifs_key_prefix(struct inode *inode, u8 **key)
+{
+ static char prefix[] = "ubifs:";
+
+ *key = prefix;
+
+ return sizeof(prefix) - 1;
+}
+
+struct fscrypt_operations ubifs_crypt_operations = {
+ .flags = FS_CFLG_INPLACE_ENCRYPTION,
+ .get_context = ubifs_crypt_get_context,
+ .set_context = ubifs_crypt_set_context,
+ .is_encrypted = ubifs_crypt_is_encrypted,
+ .empty_dir = ubifs_crypt_empty_dir,
+ .max_namelen = ubifs_crypt_max_namelen,
+ .key_prefix = ubifs_key_prefix,
+};