Merge branch 'for-linus-1' of git://git.infradead.org/mtd-2.6

[sfrench/cifs-2.6.git] / ipc / util.c

diff --git a/ipc/util.c b/ipc/util.c
index 69a0cc13d9669847cce05fd67fc2203ffdeacb9e..5c0d28921ba8c66a5d22bbcd1a40c4acdd54a4a4 100644 (file)
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -317,6 +317,7 @@ retry:
 
 /**
  *     ipc_check_perms -       check security and permissions for an IPC
+ *     @ns: IPC namespace
  *     @ipcp: ipc permission set
  *     @ops: the actual security routine to call
  *     @params: its parameters
@@ -329,12 +330,14 @@ retry:
  *
  *     It is called with ipc_ids.rw_mutex and ipcp->lock held.
  */
-static int ipc_check_perms(struct kern_ipc_perm *ipcp, struct ipc_ops *ops,
-                       struct ipc_params *params)
+static int ipc_check_perms(struct ipc_namespace *ns,
+                          struct kern_ipc_perm *ipcp,
+                          struct ipc_ops *ops,
+                          struct ipc_params *params)
 {
        int err;
 
-       if (ipcperms(ipcp, params->flg))
+       if (ipcperms(ns, ipcp, params->flg))
                err = -EACCES;
        else {
                err = ops->associate(ipcp, params->flg);
@@ -396,7 +399,7 @@ retry:
                                 * ipc_check_perms returns the IPC id on
                                 * success
                                 */
-                               err = ipc_check_perms(ipcp, ops, params);
+                               err = ipc_check_perms(ns, ipcp, ops, params);
                }
                ipc_unlock(ipcp);
        }
@@ -605,15 +608,18 @@ void ipc_rcu_putref(void *ptr)
 
 /**
  *     ipcperms        -       check IPC permissions
+ *     @ns: IPC namespace
  *     @ipcp: IPC permission set
  *     @flag: desired permission set.
  *
  *     Check user, group, other permissions for access
  *     to ipc resources. return 0 if allowed
+ *
+ *     @flag will most probably be 0 or S_...UGO from <linux/stat.h>
  */
  
-int ipcperms (struct kern_ipc_perm *ipcp, short flag)
-{      /* flag will most probably be 0 or S_...UGO from <linux/stat.h> */
+int ipcperms(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp, short flag)
+{
        uid_t euid = current_euid();
        int requested_mode, granted_mode;
 
@@ -627,7 +633,7 @@ int ipcperms (struct kern_ipc_perm *ipcp, short flag)
                granted_mode >>= 3;
        /* is there some bit set in requested_mode but not in granted_mode? */
        if ((requested_mode & ~granted_mode & 0007) && 
-           !capable(CAP_IPC_OWNER))
+           !ns_capable(ns->user_ns, CAP_IPC_OWNER))
                return -1;
 
        return security_ipc_permission(ipcp, flag);
@@ -765,6 +771,7 @@ void ipc_update_perm(struct ipc64_perm *in, struct kern_ipc_perm *out)
 
 /**
  * ipcctl_pre_down - retrieve an ipc and check permissions for some IPC_XXX cmd
+ * @ns:  the ipc namespace
  * @ids:  the table of ids where to look for the ipc
  * @id:   the id of the ipc to retrieve
  * @cmd:  the cmd to check
@@ -779,7 +786,8 @@ void ipc_update_perm(struct ipc64_perm *in, struct kern_ipc_perm *out)
  *  - returns the ipc with both ipc and rw_mutex locks held in case of success
  *    or an err-code without any lock held otherwise.
  */
-struct kern_ipc_perm *ipcctl_pre_down(struct ipc_ids *ids, int id, int cmd,
+struct kern_ipc_perm *ipcctl_pre_down(struct ipc_namespace *ns,
+                                     struct ipc_ids *ids, int id, int cmd,
                                      struct ipc64_perm *perm, int extra_perm)
 {
        struct kern_ipc_perm *ipcp;
@@ -799,8 +807,8 @@ struct kern_ipc_perm *ipcctl_pre_down(struct ipc_ids *ids, int id, int cmd,
                                         perm->gid, perm->mode);
 
        euid = current_euid();
-       if (euid == ipcp->cuid ||
-           euid == ipcp->uid  || capable(CAP_SYS_ADMIN))
+       if (euid == ipcp->cuid || euid == ipcp->uid  ||
+           ns_capable(ns->user_ns, CAP_SYS_ADMIN))
                return ipcp;
 
        err = -EPERM;