helpers for acl caching + switch to those

helpers: get_cached_acl(inode, type), set_cached_acl(inode, type, acl),
forget_cached_acl(inode, type).

ubifs/xattr.c needed includes reordered, the rest is a plain switchover.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 9 insertions, 56 deletions

diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index 0084e3a19d8..f6d8967149c 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -126,33 +126,6 @@ fail:
         return ERR_PTR(-EINVAL);
 }
 
-static inline struct posix_acl *
-ext4_iget_acl(struct inode *inode, struct posix_acl **i_acl)
-{
-        struct posix_acl *acl = ACCESS_ONCE(*i_acl);
-
-        if (acl) {
-                spin_lock(&inode->i_lock);
-                acl = *i_acl;
-                if (acl != ACL_NOT_CACHED)
-                        acl = posix_acl_dup(acl);
-                spin_unlock(&inode->i_lock);
-        }
-
-        return acl;
-}
-
-static inline void
-ext4_iset_acl(struct inode *inode, struct posix_acl **i_acl,
-                struct posix_acl *acl)
-{
-        spin_lock(&inode->i_lock);
-        if (*i_acl != ACL_NOT_CACHED)
-                posix_acl_release(*i_acl);
-        *i_acl = posix_acl_dup(acl);
-        spin_unlock(&inode->i_lock);
-}
-
 /*
  * Inode operation get_posix_acl().
  *
@@ -169,23 +142,19 @@ ext4_get_acl(struct inode *inode, int type)
         if (!test_opt(inode->i_sb, POSIX_ACL))
                 return NULL;
 
+        acl = get_cached_acl(inode, type);
+        if (acl != ACL_NOT_CACHED)
+                return acl;
+
         switch (type) {
         case ACL_TYPE_ACCESS:
-                acl = ext4_iget_acl(inode, &inode->i_acl);
-                if (acl != ACL_NOT_CACHED)
-                        return acl;
                 name_index = EXT4_XATTR_INDEX_POSIX_ACL_ACCESS;
                 break;
-
         case ACL_TYPE_DEFAULT:
-                acl = ext4_iget_acl(inode, &inode->i_default_acl);
-                if (acl != ACL_NOT_CACHED)
-                        return acl;
                 name_index = EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT;
                 break;
-
         default:
-                return ERR_PTR(-EINVAL);
+                BUG();
         }
         retval = ext4_xattr_get(inode, name_index, "", NULL, 0);
         if (retval > 0) {
@@ -202,17 +171,9 @@ ext4_get_acl(struct inode *inode, int type)
                 acl = ERR_PTR(retval);
         kfree(value);
 
-        if (!IS_ERR(acl)) {
-                switch (type) {
-                case ACL_TYPE_ACCESS:
-                        ext4_iset_acl(inode, &inode->i_acl, acl);
-                        break;
+        if (!IS_ERR(acl))
+                set_cached_acl(inode, type, acl);
 
-                case ACL_TYPE_DEFAULT:
-                        ext4_iset_acl(inode, &inode->i_default_acl, acl);
-                        break;
-                }
-        }
         return acl;
 }
 
@@ -269,17 +230,9 @@ ext4_set_acl(handle_t *handle, struct inode *inode, int type,
                                       value, size, 0);
 
         kfree(value);
-        if (!error) {
-                switch (type) {
-                case ACL_TYPE_ACCESS:
-                        ext4_iset_acl(inode, &inode->i_acl, acl);
-                        break;
+        if (!error)
+                set_cached_acl(inode, type, acl);
 
-                case ACL_TYPE_DEFAULT:
-                        ext4_iset_acl(inode, &inode->i_default_acl, acl);
-                        break;
-                }
-        }
         return error;
 }