add caching of ACLs in struct inode

No helpers, no conversions yet.

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

2 files changed, 17 insertions, 0 deletions

diff --git a/fs/inode.c b/fs/inode.c
index f643be565df8..e193cd592fa8 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -25,6 +25,7 @@
 #include <linux/fsnotify.h>
 #include <linux/mount.h>
 #include <linux/async.h>
+#include <linux/posix_acl.h>
 
 /*
  * This is needed for the following functions:
@@ -189,6 +190,9 @@ struct inode *inode_init_always(struct super_block *sb, struct inode *inode)
         }
         inode->i_private = NULL;
         inode->i_mapping = mapping;
+#ifdef CONFIG_FS_POSIX_ACL
+        inode->i_acl = inode->i_default_acl = ACL_NOT_CACHED;
+#endif
 
 #ifdef CONFIG_FSNOTIFY
         inode->i_fsnotify_mask = 0;
@@ -227,6 +231,12 @@ void destroy_inode(struct inode *inode)
         ima_inode_free(inode);
         security_inode_free(inode);
         fsnotify_inode_delete(inode);
+#ifdef CONFIG_FS_POSIX_ACL
+        if (inode->i_acl && inode->i_acl != ACL_NOT_CACHED)
+                posix_acl_release(inode->i_acl);
+        if (inode->i_default_acl && inode->i_default_acl != ACL_NOT_CACHED)
+                posix_acl_release(inode->i_default_acl);
+#endif
         if (inode->i_sb->s_op->destroy_inode)
                 inode->i_sb->s_op->destroy_inode(inode);
         else
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 79e302ddde0f..0872372184fe 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -710,6 +710,9 @@ static inline int mapping_writably_mapped(struct address_space *mapping)
 #define i_size_ordered_init(inode) do { } while (0)
 #endif
 
+struct posix_acl;
+#define ACL_NOT_CACHED ((void *)(-1))
+
 struct inode {
         struct hlist_node       i_hash;
         struct list_head        i_list;
@@ -773,6 +776,10 @@ struct inode {
 #ifdef CONFIG_SECURITY
         void                    *i_security;
 #endif
+#ifdef CONFIG_FS_POSIX_ACL
+        struct posix_acl        *i_acl;
+        struct posix_acl        *i_default_acl;
+#endif
         void                    *i_private; /* fs or device private pointer */
 };