IPC: get rid of the use *_setbuf structure.
[linux-2.6.git] / ipc / shm.c
index 65a44bcc4ac2f780e180e1a095caa5f9618489b0..5e296b04bd6b7ec20808aaabc8daed8785430181 100644 (file)
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -511,28 +511,14 @@ static inline unsigned long copy_shmid_to_user(void __user *buf, struct shmid64_
        }
 }
 
-struct shm_setbuf {
-       uid_t   uid;
-       gid_t   gid;
-       mode_t  mode;
-};     
-
-static inline unsigned long copy_shmid_from_user(struct shm_setbuf *out, void __user *buf, int version)
+static inline unsigned long
+copy_shmid_from_user(struct shmid64_ds *out, void __user *buf, int version)
 {
        switch(version) {
        case IPC_64:
-           {
-               struct shmid64_ds tbuf;
-
-               if (copy_from_user(&tbuf, buf, sizeof(tbuf)))
+               if (copy_from_user(out, buf, sizeof(*out)))
                        return -EFAULT;
-
-               out->uid        = tbuf.shm_perm.uid;
-               out->gid        = tbuf.shm_perm.gid;
-               out->mode       = tbuf.shm_perm.mode;
-
                return 0;
-           }
        case IPC_OLD:
            {
                struct shmid_ds tbuf_old;
@@ -540,9 +526,9 @@ static inline unsigned long copy_shmid_from_user(struct shm_setbuf *out, void __
                if (copy_from_user(&tbuf_old, buf, sizeof(tbuf_old)))
                        return -EFAULT;
 
-               out->uid        = tbuf_old.shm_perm.uid;
-               out->gid        = tbuf_old.shm_perm.gid;
-               out->mode       = tbuf_old.shm_perm.mode;
+               out->shm_perm.uid       = tbuf_old.shm_perm.uid;
+               out->shm_perm.gid       = tbuf_old.shm_perm.gid;
+               out->shm_perm.mode      = tbuf_old.shm_perm.mode;
 
                return 0;
            }
@@ -625,12 +611,12 @@ static int shmctl_down(struct ipc_namespace *ns, int shmid, int cmd,
                       struct shmid_ds __user *buf, int version)
 {
        struct kern_ipc_perm *ipcp;
-       struct shm_setbuf setbuf;
+       struct shmid64_ds shmid64;
        struct shmid_kernel *shp;
        int err;
 
        if (cmd == IPC_SET) {
-               if (copy_shmid_from_user(&setbuf, buf, version))
+               if (copy_shmid_from_user(&shmid64, buf, version))
                        return -EFAULT;
        }
 
@@ -648,8 +634,9 @@ static int shmctl_down(struct ipc_namespace *ns, int shmid, int cmd,
                goto out_unlock;
 
        if (cmd == IPC_SET) {
-               err = audit_ipc_set_perm(0, setbuf.uid,
-                                        setbuf.gid, setbuf.mode);
+               err = audit_ipc_set_perm(0, shmid64.shm_perm.uid,
+                                        shmid64.shm_perm.gid,
+                                        shmid64.shm_perm.mode);
                if (err)
                        goto out_unlock;
        }
@@ -669,10 +656,10 @@ static int shmctl_down(struct ipc_namespace *ns, int shmid, int cmd,
                do_shm_rmid(ns, ipcp);
                goto out_up;
        case IPC_SET:
-               ipcp->uid = setbuf.uid;
-               ipcp->gid = setbuf.gid;
+               ipcp->uid = shmid64.shm_perm.uid;
+               ipcp->gid = shmid64.shm_perm.gid;
                ipcp->mode = (ipcp->mode & ~S_IRWXUGO)
-                       | (setbuf.mode & S_IRWXUGO);
+                       | (shmid64.shm_perm.mode & S_IRWXUGO);
                shp->shm_ctim = get_seconds();
                break;
        default: