fuse: invalidate target of rename

[safe/jmp/linux-2.6] / fs / ext2 / acl.c

diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
index 239133d..a63d442 100644 (file)
--- a/fs/ext2/acl.c
+++ b/fs/ext2/acl.c
@@ -4,6 +4,7 @@
  * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
  */
 
+#include <linux/capability.h>
 #include <linux/init.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
@@ -88,8 +89,8 @@ ext2_acl_to_disk(const struct posix_acl *acl, size_t *size)
        size_t n;
 
        *size = ext2_acl_size(acl->a_count);
-       ext_acl = (ext2_acl_header *)kmalloc(sizeof(ext2_acl_header) +
-               acl->a_count * sizeof(ext2_acl_entry), GFP_KERNEL);
+       ext_acl = kmalloc(sizeof(ext2_acl_header) + acl->a_count *
+                       sizeof(ext2_acl_entry), GFP_KERNEL);
        if (!ext_acl)
                return ERR_PTR(-ENOMEM);
        ext_acl->a_version = cpu_to_le32(EXT2_ACL_VERSION);
@@ -124,37 +125,12 @@ fail:
        return ERR_PTR(-EINVAL);
 }
 
-static inline struct posix_acl *
-ext2_iget_acl(struct inode *inode, struct posix_acl **i_acl)
-{
-       struct posix_acl *acl = EXT2_ACL_NOT_CACHED;
-
-       spin_lock(&inode->i_lock);
-       if (*i_acl != EXT2_ACL_NOT_CACHED)
-               acl = posix_acl_dup(*i_acl);
-       spin_unlock(&inode->i_lock);
-
-       return acl;
-}
-
-static inline void
-ext2_iset_acl(struct inode *inode, struct posix_acl **i_acl,
-                  struct posix_acl *acl)
-{
-       spin_lock(&inode->i_lock);
-       if (*i_acl != EXT2_ACL_NOT_CACHED)
-               posix_acl_release(*i_acl);
-       *i_acl = posix_acl_dup(acl);
-       spin_unlock(&inode->i_lock);
-}
-
 /*
  * inode->i_mutex: don't care
  */
 static struct posix_acl *
 ext2_get_acl(struct inode *inode, int type)
 {
-       struct ext2_inode_info *ei = EXT2_I(inode);
        int name_index;
        char *value = NULL;
        struct posix_acl *acl;
@@ -163,23 +139,19 @@ ext2_get_acl(struct inode *inode, int type)
        if (!test_opt(inode->i_sb, POSIX_ACL))
                return NULL;
 
-       switch(type) {
-               case ACL_TYPE_ACCESS:
-                       acl = ext2_iget_acl(inode, &ei->i_acl);
-                       if (acl != EXT2_ACL_NOT_CACHED)
-                               return acl;
-                       name_index = EXT2_XATTR_INDEX_POSIX_ACL_ACCESS;
-                       break;
-
-               case ACL_TYPE_DEFAULT:
-                       acl = ext2_iget_acl(inode, &ei->i_default_acl);
-                       if (acl != EXT2_ACL_NOT_CACHED)
-                               return acl;
-                       name_index = EXT2_XATTR_INDEX_POSIX_ACL_DEFAULT;
-                       break;
-
-               default:
-                       return ERR_PTR(-EINVAL);
+       acl = get_cached_acl(inode, type);
+       if (acl != ACL_NOT_CACHED)
+               return acl;
+
+       switch (type) {
+       case ACL_TYPE_ACCESS:
+               name_index = EXT2_XATTR_INDEX_POSIX_ACL_ACCESS;
+               break;
+       case ACL_TYPE_DEFAULT:
+               name_index = EXT2_XATTR_INDEX_POSIX_ACL_DEFAULT;
+               break;
+       default:
+               BUG();
        }
        retval = ext2_xattr_get(inode, name_index, "", NULL, 0);
        if (retval > 0) {
@@ -196,17 +168,9 @@ ext2_get_acl(struct inode *inode, int type)
                acl = ERR_PTR(retval);
        kfree(value);
 
-       if (!IS_ERR(acl)) {
-               switch(type) {
-                       case ACL_TYPE_ACCESS:
-                               ext2_iset_acl(inode, &ei->i_acl, acl);
-                               break;
+       if (!IS_ERR(acl))
+               set_cached_acl(inode, type, acl);
 
-                       case ACL_TYPE_DEFAULT:
-                               ext2_iset_acl(inode, &ei->i_default_acl, acl);
-                               break;
-               }
-       }
        return acl;
 }
 
@@ -216,10 +180,9 @@ ext2_get_acl(struct inode *inode, int type)
 static int
 ext2_set_acl(struct inode *inode, int type, struct posix_acl *acl)
 {
-       struct ext2_inode_info *ei = EXT2_I(inode);
        int name_index;
        void *value = NULL;
-       size_t size;
+       size_t size = 0;
        int error;
 
        if (S_ISLNK(inode->i_mode))
@@ -262,21 +225,12 @@ ext2_set_acl(struct inode *inode, int type, struct posix_acl *acl)
        error = ext2_xattr_set(inode, name_index, "", value, size, 0);
 
        kfree(value);
-       if (!error) {
-               switch(type) {
-                       case ACL_TYPE_ACCESS:
-                               ext2_iset_acl(inode, &ei->i_acl, acl);
-                               break;
-
-                       case ACL_TYPE_DEFAULT:
-                               ext2_iset_acl(inode, &ei->i_default_acl, acl);
-                               break;
-               }
-       }
+       if (!error)
+               set_cached_acl(inode, type, acl);
        return error;
 }
 
-static int
+int
 ext2_check_acl(struct inode *inode, int mask)
 {
        struct posix_acl *acl = ext2_get_acl(inode, ACL_TYPE_ACCESS);
@@ -292,12 +246,6 @@ ext2_check_acl(struct inode *inode, int mask)
        return -EAGAIN;
 }
 
-int
-ext2_permission(struct inode *inode, int mask, struct nameidata *nd)
-{
-       return generic_permission(inode, mask, ext2_check_acl);
-}
-
 /*
  * Initialize the ACLs of a new inode. Called from ext2_new_inode.
  *
@@ -317,7 +265,7 @@ ext2_init_acl(struct inode *inode, struct inode *dir)
                                return PTR_ERR(acl);
                }
                if (!acl)
-                       inode->i_mode &= ~current->fs->umask;
+                       inode->i_mode &= ~current_umask();
        }
        if (test_opt(inode->i_sb, POSIX_ACL) && acl) {
                struct posix_acl *clone;
@@ -463,7 +411,7 @@ ext2_xattr_set_acl(struct inode *inode, int type, const void *value,
 
        if (!test_opt(inode->i_sb, POSIX_ACL))
                return -EOPNOTSUPP;
-       if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+       if (!is_owner_or_cap(inode))
                return -EPERM;
 
        if (value) {