ti: unify Kconfig with other vendors

[cascardo/linux.git] / fs / namei.c

diff --git a/fs/namei.c b/fs/namei.c
index 33e9495..d84d7c7 100644 (file)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -955,26 +955,23 @@ static bool safe_hardlink_source(struct inode *inode)
  *  - sysctl_protected_hardlinks enabled
  *  - fsuid does not match inode
  *  - hardlink source is unsafe (see safe_hardlink_source() above)
- *  - not CAP_FOWNER
+ *  - not CAP_FOWNER in a namespace with the inode owner uid mapped
  *
  * Returns 0 if successful, -ve on error.
  */
 static int may_linkat(struct path *link)
 {
-       const struct cred *cred;
        struct inode *inode;
 
        if (!sysctl_protected_hardlinks)
                return 0;
 
-       cred = current_cred();
        inode = link->dentry->d_inode;
 
        /* Source inode owner (or CAP_FOWNER) can hardlink all they like,
         * otherwise, it must be a safe source.
         */
-       if (uid_eq(cred->fsuid, inode->i_uid) || safe_hardlink_source(inode) ||
-           capable(CAP_FOWNER))
+       if (inode_owner_or_capable(inode) || safe_hardlink_source(inode))
                return 0;
 
        audit_log_link_denied("linkat", link);
@@ -1969,7 +1966,7 @@ OK:
                if (err) {
                        const char *s = get_link(nd);
 
-                       if (unlikely(IS_ERR(s)))
+                       if (IS_ERR(s))
                                return PTR_ERR(s);
                        err = 0;
                        if (unlikely(!s)) {
@@ -3383,7 +3380,7 @@ struct file *do_file_open_root(struct dentry *dentry, struct vfsmount *mnt,
                return ERR_PTR(-ELOOP);
 
        filename = getname_kernel(name);
-       if (unlikely(IS_ERR(filename)))
+       if (IS_ERR(filename))
                return ERR_CAST(filename);
 
        set_nameidata(&nd, -1, filename);
@@ -4607,7 +4604,7 @@ EXPORT_SYMBOL(__page_symlink);
 int page_symlink(struct inode *inode, const char *symname, int len)
 {
        return __page_symlink(inode, symname, len,
-                       !(mapping_gfp_mask(inode->i_mapping) & __GFP_FS));
+                       !mapping_gfp_constraint(inode->i_mapping, __GFP_FS));
 }
 EXPORT_SYMBOL(page_symlink);