fscrypt: switch from ->is_encrypted() to IS_ENCRYPTED()

IS_ENCRYPTED() now gives the same information as
i_sb->s_cop->is_encrypted() but is more efficient, since IS_ENCRYPTED()
is just a simple flag check.  Prepare to remove ->is_encrypted() by
switching all callers to IS_ENCRYPTED().

Acked-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

5 files changed, 7 insertions, 8 deletions

diff --git a/fs/crypto/crypto.c b/fs/crypto/crypto.c
index c7835df7e7b8..608f6bbe0f31 100644
--- a/fs/crypto/crypto.c
+++ b/fs/crypto/crypto.c
@@ -340,7 +340,7 @@ static int fscrypt_d_revalidate(struct dentry *dentry, unsigned int flags)
                 return -ECHILD;
 
         dir = dget_parent(dentry);
-        if (!d_inode(dir)->i_sb->s_cop->is_encrypted(d_inode(dir))) {
+        if (!IS_ENCRYPTED(d_inode(dir))) {
                 dput(dir);
                 return 0;
         }
diff --git a/fs/crypto/fname.c b/fs/crypto/fname.c
index ad9f814fdead..2878289b3ed2 100644
--- a/fs/crypto/fname.c
+++ b/fs/crypto/fname.c
@@ -382,8 +382,7 @@ int fscrypt_setup_filename(struct inode *dir, const struct qstr *iname,
         memset(fname, 0, sizeof(struct fscrypt_name));
         fname->usr_fname = iname;
 
-        if (!dir->i_sb->s_cop->is_encrypted(dir) ||
-                                fscrypt_is_dot_dotdot(iname)) {
+        if (!IS_ENCRYPTED(dir) || fscrypt_is_dot_dotdot(iname)) {
                 fname->disk_name.name = (unsigned char *)iname->name;
                 fname->disk_name.len = iname->len;
                 return 0;
diff --git a/fs/crypto/keyinfo.c b/fs/crypto/keyinfo.c
index 018c588c7ac3..236a68d4ea72 100644
--- a/fs/crypto/keyinfo.c
+++ b/fs/crypto/keyinfo.c
@@ -268,7 +268,7 @@ int fscrypt_get_encryption_info(struct inode *inode)
         res = inode->i_sb->s_cop->get_context(inode, &ctx, sizeof(ctx));
         if (res < 0) {
                 if (!fscrypt_dummy_context_enabled(inode) ||
-                    inode->i_sb->s_cop->is_encrypted(inode))
+                    IS_ENCRYPTED(inode))
                         return res;
                 /* Fake up a context for an unencrypted directory */
                 memset(&ctx, 0, sizeof(ctx));
diff --git a/fs/crypto/policy.c b/fs/crypto/policy.c
index ce07a86200f3..6a63b8a0d46c 100644
--- a/fs/crypto/policy.c
+++ b/fs/crypto/policy.c
@@ -109,7 +109,7 @@ int fscrypt_ioctl_get_policy(struct file *filp, void __user *arg)
         struct fscrypt_policy policy;
         int res;
 
-        if (!inode->i_sb->s_cop->is_encrypted(inode))
+        if (!IS_ENCRYPTED(inode))
                 return -ENODATA;
 
         res = inode->i_sb->s_cop->get_context(inode, &ctx, sizeof(ctx));
@@ -166,11 +166,11 @@ int fscrypt_has_permitted_context(struct inode *parent, struct inode *child)
                 return 1;
 
         /* No restrictions if the parent directory is unencrypted */
-        if (!cops->is_encrypted(parent))
+        if (!IS_ENCRYPTED(parent))
                 return 1;
 
         /* Encrypted directories must not contain unencrypted files */
-        if (!cops->is_encrypted(child))
+        if (!IS_ENCRYPTED(child))
                 return 0;
 
         /*
diff --git a/include/linux/fscrypt_notsupp.h b/include/linux/fscrypt_notsupp.h
index 2d0b6960831e..7b390e356f7f 100644
--- a/include/linux/fscrypt_notsupp.h
+++ b/include/linux/fscrypt_notsupp.h
@@ -100,7 +100,7 @@ static inline int fscrypt_setup_filename(struct inode *dir,
                                          const struct qstr *iname,
                                          int lookup, struct fscrypt_name *fname)
 {
-        if (dir->i_sb->s_cop->is_encrypted(dir))
+        if (IS_ENCRYPTED(dir))
                 return -EOPNOTSUPP;
 
         memset(fname, 0, sizeof(struct fscrypt_name));