net/l2tp: don't fall back on UDP [get|set]sockopt

[platform/adaptation/renesas_rcar/renesas_kernel.git] / fs / posix_acl.c

diff --git a/fs/posix_acl.c b/fs/posix_acl.c
index 38bae5a..0855f77 100644 (file)
--- a/fs/posix_acl.c
+++ b/fs/posix_acl.c
@@ -246,6 +246,12 @@ posix_acl_equiv_mode(const struct posix_acl *acl, umode_t *mode_p)
        umode_t mode = 0;
        int not_equiv = 0;
 
+       /*
+        * A null ACL can always be presented as mode bits.
+        */
+       if (!acl)
+               return 0;
+
        FOREACH_ACL_ENTRY(pa, acl, pe) {
                switch (pa->e_tag) {
                        case ACL_USER_OBJ:
@@ -521,8 +527,11 @@ posix_acl_chmod(struct inode *inode, umode_t mode)
                return -EOPNOTSUPP;
 
        acl = get_acl(inode, ACL_TYPE_ACCESS);
-       if (IS_ERR_OR_NULL(acl))
+       if (IS_ERR_OR_NULL(acl)) {
+               if (acl == ERR_PTR(-EOPNOTSUPP))
+                       return 0;
                return PTR_ERR(acl);
+       }
 
        ret = __posix_acl_chmod(&acl, GFP_KERNEL, mode);
        if (ret)
@@ -544,14 +553,15 @@ posix_acl_create(struct inode *dir, umode_t *mode,
                goto no_acl;
 
        p = get_acl(dir, ACL_TYPE_DEFAULT);
-       if (IS_ERR(p))
+       if (IS_ERR(p)) {
+               if (p == ERR_PTR(-EOPNOTSUPP))
+                       goto apply_umask;
                return PTR_ERR(p);
-
-       if (!p) {
-               *mode &= ~current_umask();
-               goto no_acl;
        }
 
+       if (!p)
+               goto apply_umask;
+
        *acl = posix_acl_clone(p, GFP_NOFS);
        if (!*acl)
                return -ENOMEM;
@@ -575,6 +585,8 @@ posix_acl_create(struct inode *dir, umode_t *mode,
        }
        return 0;
 
+apply_umask:
+       *mode &= ~current_umask();
 no_acl:
        *default_acl = NULL;
        *acl = NULL;
@@ -717,7 +729,7 @@ posix_acl_to_xattr(struct user_namespace *user_ns, const struct posix_acl *acl,
                   void *buffer, size_t size)
 {
        posix_acl_xattr_header *ext_acl = (posix_acl_xattr_header *)buffer;
-       posix_acl_xattr_entry *ext_entry = ext_acl->a_entries;
+       posix_acl_xattr_entry *ext_entry;
        int real_size, n;
 
        real_size = posix_acl_xattr_size(acl->a_count);
@@ -725,7 +737,8 @@ posix_acl_to_xattr(struct user_namespace *user_ns, const struct posix_acl *acl,
                return real_size;
        if (real_size > size)
                return -ERANGE;
-       
+
+       ext_entry = ext_acl->a_entries;
        ext_acl->a_version = cpu_to_le32(POSIX_ACL_XATTR_VERSION);
 
        for (n=0; n < acl->a_count; n++, ext_entry++) {