include/asm-x86/irq_64.h: checkpatch cleanups - formatting only

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

diff --git a/ipc/msg.c b/ipc/msg.c
index 413bf9c7aec37ebfec86fafc45c0a927587b35c7..46585a05473eceb84f23c456e0f7dc96ab0bfbf6 100644 (file)
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -36,6 +36,7 @@
 #include <linux/seq_file.h>
 #include <linux/rwsem.h>
 #include <linux/nsproxy.h>
+#include <linux/ipc_namespace.h>
 
 #include <asm/current.h>
 #include <asm/uaccess.h>
@@ -66,72 +67,37 @@ struct msg_sender {
 #define SEARCH_NOTEQUAL                3
 #define SEARCH_LESSEQUAL       4
 
-static atomic_t msg_bytes =    ATOMIC_INIT(0);
-static atomic_t msg_hdrs =     ATOMIC_INIT(0);
-
-static struct ipc_ids init_msg_ids;
-
-#define msg_ids(ns)    (*((ns)->ids[IPC_MSG_IDS]))
+#define msg_ids(ns)    ((ns)->ids[IPC_MSG_IDS])
 
 #define msg_unlock(msq)                ipc_unlock(&(msq)->q_perm)
-#define msg_buildid(ns, id, seq) \
-       ipc_buildid(&msg_ids(ns), id, seq)
+#define msg_buildid(id, seq)   ipc_buildid(id, seq)
 
-static void freeque(struct ipc_namespace *, struct msg_queue *);
+static void freeque(struct ipc_namespace *, struct kern_ipc_perm *);
 static int newque(struct ipc_namespace *, struct ipc_params *);
 #ifdef CONFIG_PROC_FS
 static int sysvipc_msg_proc_show(struct seq_file *s, void *it);
 #endif
 
-static void __msg_init_ns(struct ipc_namespace *ns, struct ipc_ids *ids)
+void msg_init_ns(struct ipc_namespace *ns)
 {
-       ns->ids[IPC_MSG_IDS] = ids;
        ns->msg_ctlmax = MSGMAX;
        ns->msg_ctlmnb = MSGMNB;
        ns->msg_ctlmni = MSGMNI;
-       ipc_init_ids(ids);
-}
-
-int msg_init_ns(struct ipc_namespace *ns)
-{
-       struct ipc_ids *ids;
-
-       ids = kmalloc(sizeof(struct ipc_ids), GFP_KERNEL);
-       if (ids == NULL)
-               return -ENOMEM;
-
-       __msg_init_ns(ns, ids);
-       return 0;
+       atomic_set(&ns->msg_bytes, 0);
+       atomic_set(&ns->msg_hdrs, 0);
+       ipc_init_ids(&ns->ids[IPC_MSG_IDS]);
 }
 
+#ifdef CONFIG_IPC_NS
 void msg_exit_ns(struct ipc_namespace *ns)
 {
-       struct msg_queue *msq;
-       int next_id;
-       int total, in_use;
-
-       down_write(&msg_ids(ns).rw_mutex);
-
-       in_use = msg_ids(ns).in_use;
-
-       for (total = 0, next_id = 0; total < in_use; next_id++) {
-               msq = idr_find(&msg_ids(ns).ipcs_idr, next_id);
-               if (msq == NULL)
-                       continue;
-               ipc_lock_by_ptr(&msq->q_perm);
-               freeque(ns, msq);
-               total++;
-       }
-
-       up_write(&msg_ids(ns).rw_mutex);
-
-       kfree(ns->ids[IPC_MSG_IDS]);
-       ns->ids[IPC_MSG_IDS] = NULL;
+       free_ipcs(ns, &msg_ids(ns), freeque);
 }
+#endif
 
 void __init msg_init(void)
 {
-       __msg_init_ns(&init_ipc_ns, &init_msg_ids);
+       msg_init_ns(&init_ipc_ns);
        ipc_init_proc_interface("sysvipc/msg",
                                "       key      msqid perms      cbytes       qnum lspid lrpid   uid   gid  cuid  cgid      stime      rtime      ctime\n",
                                IPC_MSG_IDS, sysvipc_msg_proc_show);
@@ -146,6 +112,9 @@ static inline struct msg_queue *msg_lock_check_down(struct ipc_namespace *ns,
 {
        struct kern_ipc_perm *ipcp = ipc_lock_check_down(&msg_ids(ns), id);
 
+       if (IS_ERR(ipcp))
+               return (struct msg_queue *)ipcp;
+
        return container_of(ipcp, struct msg_queue, q_perm);
 }
 
@@ -157,6 +126,9 @@ static inline struct msg_queue *msg_lock(struct ipc_namespace *ns, int id)
 {
        struct kern_ipc_perm *ipcp = ipc_lock(&msg_ids(ns), id);
 
+       if (IS_ERR(ipcp))
+               return (struct msg_queue *)ipcp;
+
        return container_of(ipcp, struct msg_queue, q_perm);
 }
 
@@ -165,6 +137,9 @@ static inline struct msg_queue *msg_lock_check(struct ipc_namespace *ns,
 {
        struct kern_ipc_perm *ipcp = ipc_lock_check(&msg_ids(ns), id);
 
+       if (IS_ERR(ipcp))
+               return (struct msg_queue *)ipcp;
+
        return container_of(ipcp, struct msg_queue, q_perm);
 }
 
@@ -205,13 +180,13 @@ static int newque(struct ipc_namespace *ns, struct ipc_params *params)
         * ipc_addid() locks msq
         */
        id = ipc_addid(&msg_ids(ns), &msq->q_perm, ns->msg_ctlmni);
-       if (id == -1) {
+       if (id < 0) {
                security_msg_queue_free(msq);
                ipc_rcu_putref(msq);
-               return -ENOSPC;
+               return id;
        }
 
-       msq->q_perm.id = msg_buildid(ns, id, msq->q_perm.seq);
+       msq->q_perm.id = msg_buildid(id, msq->q_perm.seq);
        msq->q_stime = msq->q_rtime = 0;
        msq->q_ctime = get_seconds();
        msq->q_cbytes = msq->q_qnum = 0;
@@ -280,9 +255,10 @@ static void expunge_all(struct msg_queue *msq, int res)
  * msg_ids.rw_mutex (writer) and the spinlock for this message queue are held
  * before freeque() is called. msg_ids.rw_mutex remains locked on exit.
  */
-static void freeque(struct ipc_namespace *ns, struct msg_queue *msq)
+static void freeque(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp)
 {
        struct list_head *tmp;
+       struct msg_queue *msq = container_of(ipcp, struct msg_queue, q_perm);
 
        expunge_all(msq, -EIDRM);
        ss_wakeup(&msq->q_senders, 1);
@@ -294,10 +270,10 @@ static void freeque(struct ipc_namespace *ns, struct msg_queue *msq)
                struct msg_msg *msg = list_entry(tmp, struct msg_msg, m_list);
 
                tmp = tmp->next;
-               atomic_dec(&msg_hdrs);
+               atomic_dec(&ns->msg_hdrs);
                free_msg(msg);
        }
-       atomic_sub(msq->q_cbytes, &msg_bytes);
+       atomic_sub(msq->q_cbytes, &ns->msg_bytes);
        security_msg_queue_free(msq);
        ipc_rcu_putref(msq);
 }
@@ -464,8 +440,8 @@ asmlinkage long sys_msgctl(int msqid, int cmd, struct msqid_ds __user *buf)
                down_read(&msg_ids(ns).rw_mutex);
                if (cmd == MSG_INFO) {
                        msginfo.msgpool = msg_ids(ns).in_use;
-                       msginfo.msgmap = atomic_read(&msg_hdrs);
-                       msginfo.msgtql = atomic_read(&msg_bytes);
+                       msginfo.msgmap = atomic_read(&ns->msg_hdrs);
+                       msginfo.msgtql = atomic_read(&ns->msg_bytes);
                } else {
                        msginfo.msgmap = MSGMAP;
                        msginfo.msgpool = MSGPOOL;
@@ -588,7 +564,7 @@ asmlinkage long sys_msgctl(int msqid, int cmd, struct msqid_ds __user *buf)
                break;
        }
        case IPC_RMID:
-               freeque(ns, msq);
+               freeque(ns, &msq->q_perm);
                break;
        }
        err = 0;
@@ -736,8 +712,8 @@ long do_msgsnd(int msqid, long mtype, void __user *mtext,
                list_add_tail(&msg->m_list, &msq->q_messages);
                msq->q_cbytes += msgsz;
                msq->q_qnum++;
-               atomic_add(msgsz, &msg_bytes);
-               atomic_inc(&msg_hdrs);
+               atomic_add(msgsz, &ns->msg_bytes);
+               atomic_inc(&ns->msg_hdrs);
        }
 
        err = 0;
@@ -841,8 +817,8 @@ long do_msgrcv(int msqid, long *pmtype, void __user *mtext,
                        msq->q_rtime = get_seconds();
                        msq->q_lrpid = task_tgid_vnr(current);
                        msq->q_cbytes -= msg->m_ts;
-                       atomic_sub(msg->m_ts, &msg_bytes);
-                       atomic_dec(&msg_hdrs);
+                       atomic_sub(msg->m_ts, &ns->msg_bytes);
+                       atomic_dec(&ns->msg_hdrs);
                        ss_wakeup(&msq->q_senders, 0);
                        msg_unlock(msq);
                        break;