Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/ipc/ipc_sysctl.c b/ipc/ipc_sysctl.c
index 8ad93c2..affd665 100644
--- a/ipc/ipc_sysctl.c
+++ b/ipc/ipc_sysctl.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2007
*
* Author: Eric Biederman <ebiederm@xmision.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation, version 2 of the
- * License.
*/
#include <linux/module.h>
@@ -88,17 +84,38 @@
return proc_dointvec_minmax(&ipc_table, write, buffer, lenp, ppos);
}
+static int proc_ipc_sem_dointvec(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ int ret, semmni;
+ struct ipc_namespace *ns = current->nsproxy->ipc_ns;
+
+ semmni = ns->sem_ctls[3];
+ ret = proc_ipc_dointvec(table, write, buffer, lenp, ppos);
+
+ if (!ret)
+ ret = sem_check_semmni(current->nsproxy->ipc_ns);
+
+ /*
+ * Reset the semmni value if an error happens.
+ */
+ if (ret)
+ ns->sem_ctls[3] = semmni;
+ return ret;
+}
+
#else
#define proc_ipc_doulongvec_minmax NULL
#define proc_ipc_dointvec NULL
#define proc_ipc_dointvec_minmax NULL
#define proc_ipc_dointvec_minmax_orphans NULL
#define proc_ipc_auto_msgmni NULL
+#define proc_ipc_sem_dointvec NULL
#endif
-static int zero;
-static int one = 1;
-static int int_max = INT_MAX;
+int ipc_mni = IPCMNI;
+int ipc_mni_shift = IPCMNI_SHIFT;
+int ipc_min_cycle = RADIX_TREE_MAP_SIZE;
static struct ctl_table ipc_kern_table[] = {
{
@@ -120,7 +137,9 @@
.data = &init_ipc_ns.shm_ctlmni,
.maxlen = sizeof(init_ipc_ns.shm_ctlmni),
.mode = 0644,
- .proc_handler = proc_ipc_dointvec,
+ .proc_handler = proc_ipc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &ipc_mni,
},
{
.procname = "shm_rmid_forced",
@@ -128,8 +147,8 @@
.maxlen = sizeof(init_ipc_ns.shm_rmid_forced),
.mode = 0644,
.proc_handler = proc_ipc_dointvec_minmax_orphans,
- .extra1 = &zero,
- .extra2 = &one,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
},
{
.procname = "msgmax",
@@ -137,8 +156,8 @@
.maxlen = sizeof(init_ipc_ns.msg_ctlmax),
.mode = 0644,
.proc_handler = proc_ipc_dointvec_minmax,
- .extra1 = &zero,
- .extra2 = &int_max,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_INT_MAX,
},
{
.procname = "msgmni",
@@ -146,8 +165,8 @@
.maxlen = sizeof(init_ipc_ns.msg_ctlmni),
.mode = 0644,
.proc_handler = proc_ipc_dointvec_minmax,
- .extra1 = &zero,
- .extra2 = &int_max,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &ipc_mni,
},
{
.procname = "auto_msgmni",
@@ -155,8 +174,8 @@
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_ipc_auto_msgmni,
- .extra1 = &zero,
- .extra2 = &one,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
},
{
.procname = "msgmnb",
@@ -164,15 +183,15 @@
.maxlen = sizeof(init_ipc_ns.msg_ctlmnb),
.mode = 0644,
.proc_handler = proc_ipc_dointvec_minmax,
- .extra1 = &zero,
- .extra2 = &int_max,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_INT_MAX,
},
{
.procname = "sem",
.data = &init_ipc_ns.sem_ctls,
.maxlen = 4*sizeof(int),
.mode = 0644,
- .proc_handler = proc_ipc_dointvec,
+ .proc_handler = proc_ipc_sem_dointvec,
},
#ifdef CONFIG_CHECKPOINT_RESTORE
{
@@ -181,8 +200,8 @@
.maxlen = sizeof(init_ipc_ns.ids[IPC_SEM_IDS].next_id),
.mode = 0644,
.proc_handler = proc_ipc_dointvec_minmax,
- .extra1 = &zero,
- .extra2 = &int_max,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_INT_MAX,
},
{
.procname = "msg_next_id",
@@ -190,8 +209,8 @@
.maxlen = sizeof(init_ipc_ns.ids[IPC_MSG_IDS].next_id),
.mode = 0644,
.proc_handler = proc_ipc_dointvec_minmax,
- .extra1 = &zero,
- .extra2 = &int_max,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_INT_MAX,
},
{
.procname = "shm_next_id",
@@ -199,8 +218,8 @@
.maxlen = sizeof(init_ipc_ns.ids[IPC_SHM_IDS].next_id),
.mode = 0644,
.proc_handler = proc_ipc_dointvec_minmax,
- .extra1 = &zero,
- .extra2 = &int_max,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_INT_MAX,
},
#endif
{}
@@ -222,3 +241,13 @@
}
device_initcall(ipc_sysctl_init);
+
+static int __init ipc_mni_extend(char *str)
+{
+ ipc_mni = IPCMNI_EXTEND;
+ ipc_mni_shift = IPCMNI_EXTEND_SHIFT;
+ ipc_min_cycle = IPCMNI_EXTEND_MIN_CYCLE;
+ pr_info("IPCMNI extended to %d.\n", ipc_mni);
+ return 0;
+}
+early_param("ipcmni_extend", ipc_mni_extend);
diff --git a/ipc/mq_sysctl.c b/ipc/mq_sysctl.c
index 68d4e95..7c00f28 100644
--- a/ipc/mq_sysctl.c
+++ b/ipc/mq_sysctl.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2007 IBM Corporation
*
* Author: Cedric Le Goater <clg@fr.ibm.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation, version 2 of the
- * License.
*/
#include <linux/nsproxy.h>
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index c0d58f3..3d920ff 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -18,6 +18,7 @@
#include <linux/pagemap.h>
#include <linux/file.h>
#include <linux/mount.h>
+#include <linux/fs_context.h>
#include <linux/namei.h>
#include <linux/sysctl.h>
#include <linux/poll.h>
@@ -42,6 +43,10 @@
#include <net/sock.h>
#include "util.h"
+struct mqueue_fs_context {
+ struct ipc_namespace *ipc_ns;
+};
+
#define MQUEUE_MAGIC 0x19800202
#define DIRENT_SIZE 20
#define FILENT_SIZE 80
@@ -71,6 +76,7 @@
wait_queue_head_t wait_q;
struct rb_root msg_tree;
+ struct rb_node *msg_tree_rightmost;
struct posix_msg_tree_node *node_cache;
struct mq_attr attr;
@@ -87,9 +93,11 @@
unsigned long qsize; /* size of queue in memory (sum of all msgs) */
};
+static struct file_system_type mqueue_fs_type;
static const struct inode_operations mqueue_dir_inode_operations;
static const struct file_operations mqueue_file_operations;
static const struct super_operations mqueue_super_ops;
+static const struct fs_context_operations mqueue_fs_context_ops;
static void remove_notification(struct mqueue_inode_info *info);
static struct kmem_cache *mqueue_inode_cachep;
@@ -124,6 +132,7 @@
{
struct rb_node **p, *parent = NULL;
struct posix_msg_tree_node *leaf;
+ bool rightmost = true;
p = &info->msg_tree.rb_node;
while (*p) {
@@ -132,9 +141,10 @@
if (likely(leaf->priority == msg->m_type))
goto insert_msg;
- else if (msg->m_type < leaf->priority)
+ else if (msg->m_type < leaf->priority) {
p = &(*p)->rb_left;
- else
+ rightmost = false;
+ } else
p = &(*p)->rb_right;
}
if (info->node_cache) {
@@ -147,6 +157,10 @@
INIT_LIST_HEAD(&leaf->msg_list);
}
leaf->priority = msg->m_type;
+
+ if (rightmost)
+ info->msg_tree_rightmost = &leaf->rb_node;
+
rb_link_node(&leaf->rb_node, parent, p);
rb_insert_color(&leaf->rb_node, &info->msg_tree);
insert_msg:
@@ -156,23 +170,35 @@
return 0;
}
+static inline void msg_tree_erase(struct posix_msg_tree_node *leaf,
+ struct mqueue_inode_info *info)
+{
+ struct rb_node *node = &leaf->rb_node;
+
+ if (info->msg_tree_rightmost == node)
+ info->msg_tree_rightmost = rb_prev(node);
+
+ rb_erase(node, &info->msg_tree);
+ if (info->node_cache) {
+ kfree(leaf);
+ } else {
+ info->node_cache = leaf;
+ }
+}
+
static inline struct msg_msg *msg_get(struct mqueue_inode_info *info)
{
- struct rb_node **p, *parent = NULL;
+ struct rb_node *parent = NULL;
struct posix_msg_tree_node *leaf;
struct msg_msg *msg;
try_again:
- p = &info->msg_tree.rb_node;
- while (*p) {
- parent = *p;
- /*
- * During insert, low priorities go to the left and high to the
- * right. On receive, we want the highest priorities first, so
- * walk all the way to the right.
- */
- p = &(*p)->rb_right;
- }
+ /*
+ * During insert, low priorities go to the left and high to the
+ * right. On receive, we want the highest priorities first, so
+ * walk all the way to the right.
+ */
+ parent = info->msg_tree_rightmost;
if (!parent) {
if (info->attr.mq_curmsgs) {
pr_warn_once("Inconsistency in POSIX message queue, "
@@ -187,24 +213,14 @@
pr_warn_once("Inconsistency in POSIX message queue, "
"empty leaf node but we haven't implemented "
"lazy leaf delete!\n");
- rb_erase(&leaf->rb_node, &info->msg_tree);
- if (info->node_cache) {
- kfree(leaf);
- } else {
- info->node_cache = leaf;
- }
+ msg_tree_erase(leaf, info);
goto try_again;
} else {
msg = list_first_entry(&leaf->msg_list,
struct msg_msg, m_list);
list_del(&msg->m_list);
if (list_empty(&leaf->msg_list)) {
- rb_erase(&leaf->rb_node, &info->msg_tree);
- if (info->node_cache) {
- kfree(leaf);
- } else {
- info->node_cache = leaf;
- }
+ msg_tree_erase(leaf, info);
}
}
info->attr.mq_curmsgs--;
@@ -247,6 +263,7 @@
info->qsize = 0;
info->user = NULL; /* set when all is ok */
info->msg_tree = RB_ROOT;
+ info->msg_tree_rightmost = NULL;
info->node_cache = NULL;
memset(&info->attr, 0, sizeof(info->attr));
info->attr.mq_maxmsg = min(ipc_ns->mq_msg_max,
@@ -322,7 +339,7 @@
return ERR_PTR(ret);
}
-static int mqueue_fill_super(struct super_block *sb, void *data, int silent)
+static int mqueue_fill_super(struct super_block *sb, struct fs_context *fc)
{
struct inode *inode;
struct ipc_namespace *ns = sb->s_fs_info;
@@ -343,18 +360,56 @@
return 0;
}
-static struct dentry *mqueue_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
+static int mqueue_get_tree(struct fs_context *fc)
{
- struct ipc_namespace *ns;
- if (flags & SB_KERNMOUNT) {
- ns = data;
- data = NULL;
- } else {
- ns = current->nsproxy->ipc_ns;
- }
- return mount_ns(fs_type, flags, data, ns, ns->user_ns, mqueue_fill_super);
+ struct mqueue_fs_context *ctx = fc->fs_private;
+
+ return get_tree_keyed(fc, mqueue_fill_super, ctx->ipc_ns);
+}
+
+static void mqueue_fs_context_free(struct fs_context *fc)
+{
+ struct mqueue_fs_context *ctx = fc->fs_private;
+
+ put_ipc_ns(ctx->ipc_ns);
+ kfree(ctx);
+}
+
+static int mqueue_init_fs_context(struct fs_context *fc)
+{
+ struct mqueue_fs_context *ctx;
+
+ ctx = kzalloc(sizeof(struct mqueue_fs_context), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->ipc_ns = get_ipc_ns(current->nsproxy->ipc_ns);
+ put_user_ns(fc->user_ns);
+ fc->user_ns = get_user_ns(ctx->ipc_ns->user_ns);
+ fc->fs_private = ctx;
+ fc->ops = &mqueue_fs_context_ops;
+ return 0;
+}
+
+static struct vfsmount *mq_create_mount(struct ipc_namespace *ns)
+{
+ struct mqueue_fs_context *ctx;
+ struct fs_context *fc;
+ struct vfsmount *mnt;
+
+ fc = fs_context_for_mount(&mqueue_fs_type, SB_KERNMOUNT);
+ if (IS_ERR(fc))
+ return ERR_CAST(fc);
+
+ ctx = fc->fs_private;
+ put_ipc_ns(ctx->ipc_ns);
+ ctx->ipc_ns = get_ipc_ns(ns);
+ put_user_ns(fc->user_ns);
+ fc->user_ns = get_user_ns(ctx->ipc_ns->user_ns);
+
+ mnt = fc_mount(fc);
+ put_fs_context(fc);
+ return mnt;
}
static void init_once(void *foo)
@@ -374,24 +429,18 @@
return &ei->vfs_inode;
}
-static void mqueue_i_callback(struct rcu_head *head)
+static void mqueue_free_inode(struct inode *inode)
{
- struct inode *inode = container_of(head, struct inode, i_rcu);
kmem_cache_free(mqueue_inode_cachep, MQUEUE_I(inode));
}
-static void mqueue_destroy_inode(struct inode *inode)
-{
- call_rcu(&inode->i_rcu, mqueue_i_callback);
-}
-
static void mqueue_evict_inode(struct inode *inode)
{
struct mqueue_inode_info *info;
struct user_struct *user;
- unsigned long mq_bytes, mq_treesize;
struct ipc_namespace *ipc_ns;
- struct msg_msg *msg;
+ struct msg_msg *msg, *nmsg;
+ LIST_HEAD(tmp_msg);
clear_inode(inode);
@@ -402,20 +451,27 @@
info = MQUEUE_I(inode);
spin_lock(&info->lock);
while ((msg = msg_get(info)) != NULL)
- free_msg(msg);
+ list_add_tail(&msg->m_list, &tmp_msg);
kfree(info->node_cache);
spin_unlock(&info->lock);
- /* Total amount of bytes accounted for the mqueue */
- mq_treesize = info->attr.mq_maxmsg * sizeof(struct msg_msg) +
- min_t(unsigned int, info->attr.mq_maxmsg, MQ_PRIO_MAX) *
- sizeof(struct posix_msg_tree_node);
-
- mq_bytes = mq_treesize + (info->attr.mq_maxmsg *
- info->attr.mq_msgsize);
+ list_for_each_entry_safe(msg, nmsg, &tmp_msg, m_list) {
+ list_del(&msg->m_list);
+ free_msg(msg);
+ }
user = info->user;
if (user) {
+ unsigned long mq_bytes, mq_treesize;
+
+ /* Total amount of bytes accounted for the mqueue */
+ mq_treesize = info->attr.mq_maxmsg * sizeof(struct msg_msg) +
+ min_t(unsigned int, info->attr.mq_maxmsg, MQ_PRIO_MAX) *
+ sizeof(struct posix_msg_tree_node);
+
+ mq_bytes = mq_treesize + (info->attr.mq_maxmsg *
+ info->attr.mq_msgsize);
+
spin_lock(&mq_lock);
user->mq_bytes -= mq_bytes;
/*
@@ -566,8 +622,6 @@
{
struct ext_wait_queue *walk;
- ewp->task = current;
-
list_for_each_entry(walk, &info->e_wait_q[sr].list, list) {
if (walk->task->prio <= current->prio) {
list_add_tail(&ewp->list, &walk->list);
@@ -655,7 +709,7 @@
* synchronously. */
if (info->notify_owner &&
info->attr.mq_curmsgs == 1) {
- struct siginfo sig_i;
+ struct kernel_siginfo sig_i;
switch (info->notify.sigev_notify) {
case SIGEV_NONE:
break;
@@ -1186,15 +1240,14 @@
/* create the notify skb */
nc = alloc_skb(NOTIFY_COOKIE_LEN, GFP_KERNEL);
- if (!nc) {
- ret = -ENOMEM;
- goto out;
- }
+ if (!nc)
+ return -ENOMEM;
+
if (copy_from_user(nc->data,
notification->sigev_value.sival_ptr,
NOTIFY_COOKIE_LEN)) {
ret = -EFAULT;
- goto out;
+ goto free_skb;
}
/* TODO: add a header? */
@@ -1210,8 +1263,7 @@
fdput(f);
if (IS_ERR(sock)) {
ret = PTR_ERR(sock);
- sock = NULL;
- goto out;
+ goto free_skb;
}
timeo = MAX_SCHEDULE_TIMEOUT;
@@ -1220,11 +1272,8 @@
sock = NULL;
goto retry;
}
- if (ret) {
- sock = NULL;
- nc = NULL;
- goto out;
- }
+ if (ret)
+ return ret;
}
}
@@ -1279,7 +1328,8 @@
out:
if (sock)
netlink_detachskb(sock, nc);
- else if (nc)
+ else
+free_skb:
dev_kfree_skb(nc);
return ret;
@@ -1461,20 +1511,20 @@
#endif
#ifdef CONFIG_COMPAT_32BIT_TIME
-static int compat_prepare_timeout(const struct compat_timespec __user *p,
+static int compat_prepare_timeout(const struct old_timespec32 __user *p,
struct timespec64 *ts)
{
- if (compat_get_timespec64(ts, p))
+ if (get_old_timespec32(ts, p))
return -EFAULT;
if (!timespec64_valid(ts))
return -EINVAL;
return 0;
}
-COMPAT_SYSCALL_DEFINE5(mq_timedsend, mqd_t, mqdes,
- const char __user *, u_msg_ptr,
- compat_size_t, msg_len, unsigned int, msg_prio,
- const struct compat_timespec __user *, u_abs_timeout)
+SYSCALL_DEFINE5(mq_timedsend_time32, mqd_t, mqdes,
+ const char __user *, u_msg_ptr,
+ unsigned int, msg_len, unsigned int, msg_prio,
+ const struct old_timespec32 __user *, u_abs_timeout)
{
struct timespec64 ts, *p = NULL;
if (u_abs_timeout) {
@@ -1486,10 +1536,10 @@
return do_mq_timedsend(mqdes, u_msg_ptr, msg_len, msg_prio, p);
}
-COMPAT_SYSCALL_DEFINE5(mq_timedreceive, mqd_t, mqdes,
- char __user *, u_msg_ptr,
- compat_size_t, msg_len, unsigned int __user *, u_msg_prio,
- const struct compat_timespec __user *, u_abs_timeout)
+SYSCALL_DEFINE5(mq_timedreceive_time32, mqd_t, mqdes,
+ char __user *, u_msg_ptr,
+ unsigned int, msg_len, unsigned int __user *, u_msg_prio,
+ const struct old_timespec32 __user *, u_abs_timeout)
{
struct timespec64 ts, *p = NULL;
if (u_abs_timeout) {
@@ -1517,20 +1567,27 @@
static const struct super_operations mqueue_super_ops = {
.alloc_inode = mqueue_alloc_inode,
- .destroy_inode = mqueue_destroy_inode,
+ .free_inode = mqueue_free_inode,
.evict_inode = mqueue_evict_inode,
.statfs = simple_statfs,
};
+static const struct fs_context_operations mqueue_fs_context_ops = {
+ .free = mqueue_fs_context_free,
+ .get_tree = mqueue_get_tree,
+};
+
static struct file_system_type mqueue_fs_type = {
- .name = "mqueue",
- .mount = mqueue_mount,
- .kill_sb = kill_litter_super,
- .fs_flags = FS_USERNS_MOUNT,
+ .name = "mqueue",
+ .init_fs_context = mqueue_init_fs_context,
+ .kill_sb = kill_litter_super,
+ .fs_flags = FS_USERNS_MOUNT,
};
int mq_init_ns(struct ipc_namespace *ns)
{
+ struct vfsmount *m;
+
ns->mq_queues_count = 0;
ns->mq_queues_max = DFLT_QUEUESMAX;
ns->mq_msg_max = DFLT_MSGMAX;
@@ -1538,12 +1595,10 @@
ns->mq_msg_default = DFLT_MSG;
ns->mq_msgsize_default = DFLT_MSGSIZE;
- ns->mq_mnt = kern_mount_data(&mqueue_fs_type, ns);
- if (IS_ERR(ns->mq_mnt)) {
- int err = PTR_ERR(ns->mq_mnt);
- ns->mq_mnt = NULL;
- return err;
- }
+ m = mq_create_mount(ns);
+ if (IS_ERR(m))
+ return PTR_ERR(m);
+ ns->mq_mnt = m;
return 0;
}
diff --git a/ipc/msg.c b/ipc/msg.c
index 883642c..8dec945 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -567,9 +567,8 @@
return err;
}
-long ksys_msgctl(int msqid, int cmd, struct msqid_ds __user *buf)
+static long ksys_msgctl(int msqid, int cmd, struct msqid_ds __user *buf, int version)
{
- int version;
struct ipc_namespace *ns;
struct msqid64_ds msqid64;
int err;
@@ -577,7 +576,6 @@
if (msqid < 0 || cmd < 0)
return -EINVAL;
- version = ipc_parse_version(&cmd);
ns = current->nsproxy->ipc_ns;
switch (cmd) {
@@ -613,18 +611,32 @@
SYSCALL_DEFINE3(msgctl, int, msqid, int, cmd, struct msqid_ds __user *, buf)
{
- return ksys_msgctl(msqid, cmd, buf);
+ return ksys_msgctl(msqid, cmd, buf, IPC_64);
}
+#ifdef CONFIG_ARCH_WANT_IPC_PARSE_VERSION
+long ksys_old_msgctl(int msqid, int cmd, struct msqid_ds __user *buf)
+{
+ int version = ipc_parse_version(&cmd);
+
+ return ksys_msgctl(msqid, cmd, buf, version);
+}
+
+SYSCALL_DEFINE3(old_msgctl, int, msqid, int, cmd, struct msqid_ds __user *, buf)
+{
+ return ksys_old_msgctl(msqid, cmd, buf);
+}
+#endif
+
#ifdef CONFIG_COMPAT
struct compat_msqid_ds {
struct compat_ipc_perm msg_perm;
compat_uptr_t msg_first;
compat_uptr_t msg_last;
- compat_time_t msg_stime;
- compat_time_t msg_rtime;
- compat_time_t msg_ctime;
+ old_time32_t msg_stime;
+ old_time32_t msg_rtime;
+ old_time32_t msg_ctime;
compat_ulong_t msg_lcbytes;
compat_ulong_t msg_lqbytes;
unsigned short msg_cbytes;
@@ -689,12 +701,11 @@
}
}
-long compat_ksys_msgctl(int msqid, int cmd, void __user *uptr)
+static long compat_ksys_msgctl(int msqid, int cmd, void __user *uptr, int version)
{
struct ipc_namespace *ns;
int err;
struct msqid64_ds msqid64;
- int version = compat_ipc_parse_version(&cmd);
ns = current->nsproxy->ipc_ns;
@@ -734,8 +745,22 @@
COMPAT_SYSCALL_DEFINE3(msgctl, int, msqid, int, cmd, void __user *, uptr)
{
- return compat_ksys_msgctl(msqid, cmd, uptr);
+ return compat_ksys_msgctl(msqid, cmd, uptr, IPC_64);
}
+
+#ifdef CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION
+long compat_ksys_old_msgctl(int msqid, int cmd, void __user *uptr)
+{
+ int version = compat_ipc_parse_version(&cmd);
+
+ return compat_ksys_msgctl(msqid, cmd, uptr, version);
+}
+
+COMPAT_SYSCALL_DEFINE3(old_msgctl, int, msqid, int, cmd, void __user *, uptr)
+{
+ return compat_ksys_old_msgctl(msqid, cmd, uptr);
+}
+#endif
#endif
static int testmsg(struct msg_msg *msg, long type, int mode)
diff --git a/ipc/msgutil.c b/ipc/msgutil.c
index 8459802..3149b4a 100644
--- a/ipc/msgutil.c
+++ b/ipc/msgutil.c
@@ -1,11 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* linux/ipc/msgutil.c
* Copyright (C) 1999, 2004 Manfred Spraul
- *
- * This file is released under GNU General Public Licence version 2 or
- * (at your option) any later version.
- *
- * See the file COPYING for more details.
*/
#include <linux/spinlock.h>
@@ -18,6 +14,7 @@
#include <linux/utsname.h>
#include <linux/proc_ns.h>
#include <linux/uaccess.h>
+#include <linux/sched.h>
#include "util.h"
@@ -64,6 +61,9 @@
pseg = &msg->next;
while (len > 0) {
struct msg_msgseg *seg;
+
+ cond_resched();
+
alen = min(len, DATALEN_SEG);
seg = kmalloc(sizeof(*seg) + alen, GFP_KERNEL_ACCOUNT);
if (seg == NULL)
@@ -176,6 +176,8 @@
kfree(msg);
while (seg != NULL) {
struct msg_msgseg *tmp = seg->next;
+
+ cond_resched();
kfree(seg);
seg = tmp;
}
diff --git a/ipc/namespace.c b/ipc/namespace.c
index 2160779..b3ca147 100644
--- a/ipc/namespace.c
+++ b/ipc/namespace.c
@@ -42,7 +42,7 @@
goto fail;
err = -ENOMEM;
- ns = kmalloc(sizeof(struct ipc_namespace), GFP_KERNEL);
+ ns = kzalloc(sizeof(struct ipc_namespace), GFP_KERNEL);
if (ns == NULL)
goto fail_dec;
diff --git a/ipc/sem.c b/ipc/sem.c
index 26f8e37..ec97a70 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -488,18 +488,14 @@
static struct sem_array *sem_alloc(size_t nsems)
{
struct sem_array *sma;
- size_t size;
if (nsems > (INT_MAX - sizeof(*sma)) / sizeof(sma->sems[0]))
return NULL;
- size = sizeof(*sma) + nsems * sizeof(sma->sems[0]);
- sma = kvmalloc(size, GFP_KERNEL);
+ sma = kvzalloc(struct_size(sma, sems, nsems), GFP_KERNEL);
if (unlikely(!sma))
return NULL;
- memset(sma, 0, size);
-
return sma;
}
@@ -1634,9 +1630,8 @@
return err;
}
-long ksys_semctl(int semid, int semnum, int cmd, unsigned long arg)
+static long ksys_semctl(int semid, int semnum, int cmd, unsigned long arg, int version)
{
- int version;
struct ipc_namespace *ns;
void __user *p = (void __user *)arg;
struct semid64_ds semid64;
@@ -1645,7 +1640,6 @@
if (semid < 0)
return -EINVAL;
- version = ipc_parse_version(&cmd);
ns = current->nsproxy->ipc_ns;
switch (cmd) {
@@ -1682,6 +1676,7 @@
case IPC_SET:
if (copy_semid_from_user(&semid64, p, version))
return -EFAULT;
+ /* fall through */
case IPC_RMID:
return semctl_down(ns, semid, cmd, &semid64);
default:
@@ -1691,15 +1686,29 @@
SYSCALL_DEFINE4(semctl, int, semid, int, semnum, int, cmd, unsigned long, arg)
{
- return ksys_semctl(semid, semnum, cmd, arg);
+ return ksys_semctl(semid, semnum, cmd, arg, IPC_64);
}
+#ifdef CONFIG_ARCH_WANT_IPC_PARSE_VERSION
+long ksys_old_semctl(int semid, int semnum, int cmd, unsigned long arg)
+{
+ int version = ipc_parse_version(&cmd);
+
+ return ksys_semctl(semid, semnum, cmd, arg, version);
+}
+
+SYSCALL_DEFINE4(old_semctl, int, semid, int, semnum, int, cmd, unsigned long, arg)
+{
+ return ksys_old_semctl(semid, semnum, cmd, arg);
+}
+#endif
+
#ifdef CONFIG_COMPAT
struct compat_semid_ds {
struct compat_ipc_perm sem_perm;
- compat_time_t sem_otime;
- compat_time_t sem_ctime;
+ old_time32_t sem_otime;
+ old_time32_t sem_ctime;
compat_uptr_t sem_base;
compat_uptr_t sem_pending;
compat_uptr_t sem_pending_last;
@@ -1744,12 +1753,11 @@
}
}
-long compat_ksys_semctl(int semid, int semnum, int cmd, int arg)
+static long compat_ksys_semctl(int semid, int semnum, int cmd, int arg, int version)
{
void __user *p = compat_ptr(arg);
struct ipc_namespace *ns;
struct semid64_ds semid64;
- int version = compat_ipc_parse_version(&cmd);
int err;
ns = current->nsproxy->ipc_ns;
@@ -1792,8 +1800,22 @@
COMPAT_SYSCALL_DEFINE4(semctl, int, semid, int, semnum, int, cmd, int, arg)
{
- return compat_ksys_semctl(semid, semnum, cmd, arg);
+ return compat_ksys_semctl(semid, semnum, cmd, arg, IPC_64);
}
+
+#ifdef CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION
+long compat_ksys_old_semctl(int semid, int semnum, int cmd, int arg)
+{
+ int version = compat_ipc_parse_version(&cmd);
+
+ return compat_ksys_semctl(semid, semnum, cmd, arg, version);
+}
+
+COMPAT_SYSCALL_DEFINE4(old_semctl, int, semid, int, semnum, int, cmd, int, arg)
+{
+ return compat_ksys_old_semctl(semid, semnum, cmd, arg);
+}
+#endif
#endif
/* If the task doesn't already have a undo_list, then allocate one
@@ -1830,7 +1852,8 @@
{
struct sem_undo *un;
- list_for_each_entry_rcu(un, &ulp->list_proc, list_proc) {
+ list_for_each_entry_rcu(un, &ulp->list_proc, list_proc,
+ spin_is_locked(&ulp->lock)) {
if (un->semid == semid)
return un;
}
@@ -2214,20 +2237,20 @@
#ifdef CONFIG_COMPAT_32BIT_TIME
long compat_ksys_semtimedop(int semid, struct sembuf __user *tsems,
unsigned int nsops,
- const struct compat_timespec __user *timeout)
+ const struct old_timespec32 __user *timeout)
{
if (timeout) {
struct timespec64 ts;
- if (compat_get_timespec64(&ts, timeout))
+ if (get_old_timespec32(&ts, timeout))
return -EFAULT;
return do_semtimedop(semid, tsems, nsops, &ts);
}
return do_semtimedop(semid, tsems, nsops, NULL);
}
-COMPAT_SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsems,
+SYSCALL_DEFINE4(semtimedop_time32, int, semid, struct sembuf __user *, tsems,
unsigned int, nsops,
- const struct compat_timespec __user *, timeout)
+ const struct old_timespec32 __user *, timeout)
{
return compat_ksys_semtimedop(semid, tsems, nsops, timeout);
}
diff --git a/ipc/shm.c b/ipc/shm.c
index 1c65fb3..ce1ca9f 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -1137,16 +1137,15 @@
return err;
}
-long ksys_shmctl(int shmid, int cmd, struct shmid_ds __user *buf)
+static long ksys_shmctl(int shmid, int cmd, struct shmid_ds __user *buf, int version)
{
- int err, version;
+ int err;
struct ipc_namespace *ns;
struct shmid64_ds sem64;
if (cmd < 0 || shmid < 0)
return -EINVAL;
- version = ipc_parse_version(&cmd);
ns = current->nsproxy->ipc_ns;
switch (cmd) {
@@ -1194,17 +1193,31 @@
SYSCALL_DEFINE3(shmctl, int, shmid, int, cmd, struct shmid_ds __user *, buf)
{
- return ksys_shmctl(shmid, cmd, buf);
+ return ksys_shmctl(shmid, cmd, buf, IPC_64);
}
+#ifdef CONFIG_ARCH_WANT_IPC_PARSE_VERSION
+long ksys_old_shmctl(int shmid, int cmd, struct shmid_ds __user *buf)
+{
+ int version = ipc_parse_version(&cmd);
+
+ return ksys_shmctl(shmid, cmd, buf, version);
+}
+
+SYSCALL_DEFINE3(old_shmctl, int, shmid, int, cmd, struct shmid_ds __user *, buf)
+{
+ return ksys_old_shmctl(shmid, cmd, buf);
+}
+#endif
+
#ifdef CONFIG_COMPAT
struct compat_shmid_ds {
struct compat_ipc_perm shm_perm;
int shm_segsz;
- compat_time_t shm_atime;
- compat_time_t shm_dtime;
- compat_time_t shm_ctime;
+ old_time32_t shm_atime;
+ old_time32_t shm_dtime;
+ old_time32_t shm_ctime;
compat_ipc_pid_t shm_cpid;
compat_ipc_pid_t shm_lpid;
unsigned short shm_nattch;
@@ -1319,11 +1332,10 @@
}
}
-long compat_ksys_shmctl(int shmid, int cmd, void __user *uptr)
+long compat_ksys_shmctl(int shmid, int cmd, void __user *uptr, int version)
{
struct ipc_namespace *ns;
struct shmid64_ds sem64;
- int version = compat_ipc_parse_version(&cmd);
int err;
ns = current->nsproxy->ipc_ns;
@@ -1378,8 +1390,22 @@
COMPAT_SYSCALL_DEFINE3(shmctl, int, shmid, int, cmd, void __user *, uptr)
{
- return compat_ksys_shmctl(shmid, cmd, uptr);
+ return compat_ksys_shmctl(shmid, cmd, uptr, IPC_64);
}
+
+#ifdef CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION
+long compat_ksys_old_shmctl(int shmid, int cmd, void __user *uptr)
+{
+ int version = compat_ipc_parse_version(&cmd);
+
+ return compat_ksys_shmctl(shmid, cmd, uptr, version);
+}
+
+COMPAT_SYSCALL_DEFINE3(old_shmctl, int, shmid, int, cmd, void __user *, uptr)
+{
+ return compat_ksys_old_shmctl(shmid, cmd, uptr);
+}
+#endif
#endif
/*
diff --git a/ipc/syscall.c b/ipc/syscall.c
index 65d405f..581bdff 100644
--- a/ipc/syscall.c
+++ b/ipc/syscall.c
@@ -17,8 +17,8 @@
#include <linux/shm.h>
#include <linux/uaccess.h>
-SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second,
- unsigned long, third, void __user *, ptr, long, fifth)
+int ksys_ipc(unsigned int call, int first, unsigned long second,
+ unsigned long third, void __user * ptr, long fifth)
{
int version, ret;
@@ -35,7 +35,7 @@
(const struct __kernel_timespec __user *)fifth);
else if (IS_ENABLED(CONFIG_COMPAT_32BIT_TIME))
return compat_ksys_semtimedop(first, ptr, second,
- (const struct compat_timespec __user *)fifth);
+ (const struct old_timespec32 __user *)fifth);
else
return -ENOSYS;
@@ -47,7 +47,7 @@
return -EINVAL;
if (get_user(arg, (unsigned long __user *) ptr))
return -EFAULT;
- return ksys_semctl(first, second, third, arg);
+ return ksys_old_semctl(first, second, third, arg);
}
case MSGSND:
@@ -75,7 +75,7 @@
case MSGGET:
return ksys_msgget((key_t) first, second);
case MSGCTL:
- return ksys_msgctl(first, second,
+ return ksys_old_msgctl(first, second,
(struct msqid_ds __user *)ptr);
case SHMAT:
@@ -100,12 +100,18 @@
case SHMGET:
return ksys_shmget(first, second, third);
case SHMCTL:
- return ksys_shmctl(first, second,
+ return ksys_old_shmctl(first, second,
(struct shmid_ds __user *) ptr);
default:
return -ENOSYS;
}
}
+
+SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second,
+ unsigned long, third, void __user *, ptr, long, fifth)
+{
+ return ksys_ipc(call, first, second, third, ptr, fifth);
+}
#endif
#ifdef CONFIG_COMPAT
@@ -121,8 +127,8 @@
};
#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
-COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
- u32, third, compat_uptr_t, ptr, u32, fifth)
+int compat_ksys_ipc(u32 call, int first, int second,
+ u32 third, compat_uptr_t ptr, u32 fifth)
{
int version;
u32 pad;
@@ -146,7 +152,7 @@
return -EINVAL;
if (get_user(pad, (u32 __user *) compat_ptr(ptr)))
return -EFAULT;
- return compat_ksys_semctl(first, second, third, pad);
+ return compat_ksys_old_semctl(first, second, third, pad);
case MSGSND:
return compat_ksys_msgsnd(first, ptr, second, third);
@@ -171,7 +177,7 @@
case MSGGET:
return ksys_msgget(first, second);
case MSGCTL:
- return compat_ksys_msgctl(first, second, compat_ptr(ptr));
+ return compat_ksys_old_msgctl(first, second, compat_ptr(ptr));
case SHMAT: {
int err;
@@ -190,10 +196,16 @@
case SHMGET:
return ksys_shmget(first, (unsigned int)second, third);
case SHMCTL:
- return compat_ksys_shmctl(first, second, compat_ptr(ptr));
+ return compat_ksys_old_shmctl(first, second, compat_ptr(ptr));
}
return -ENOSYS;
}
+
+COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
+ u32, third, compat_uptr_t, ptr, u32, fifth)
+{
+ return compat_ksys_ipc(call, first, second, third, ptr, fifth);
+}
#endif
#endif
diff --git a/ipc/util.c b/ipc/util.c
index 0af0575..d126d15 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -101,7 +101,6 @@
.head_offset = offsetof(struct kern_ipc_perm, khtnode),
.key_offset = offsetof(struct kern_ipc_perm, key),
.key_len = FIELD_SIZEOF(struct kern_ipc_perm, key),
- .locks_mul = 1,
.automatic_shrinking = true,
};
@@ -110,7 +109,7 @@
* @ids: ipc identifier set
*
* Set up the sequence range to use for the ipc identifier range (limited
- * below IPCMNI) then initialise the keys hashtable and ids idr.
+ * below ipc_mni) then initialise the keys hashtable and ids idr.
*/
void ipc_init_ids(struct ipc_ids *ids)
{
@@ -120,6 +119,7 @@
rhashtable_init(&ids->key_ht, &ipc_kht_params);
idr_init(&ids->ipcs_idr);
ids->max_idx = -1;
+ ids->last_idx = -1;
#ifdef CONFIG_CHECKPOINT_RESTORE
ids->next_id = -1;
#endif
@@ -193,6 +193,10 @@
*
* The caller must own kern_ipc_perm.lock.of the new object.
* On error, the function returns a (negative) error code.
+ *
+ * To conserve sequence number space, especially with extended ipc_mni,
+ * the sequence number is incremented only when the returned ID is less than
+ * the last one.
*/
static inline int ipc_idr_alloc(struct ipc_ids *ids, struct kern_ipc_perm *new)
{
@@ -216,17 +220,42 @@
*/
if (next_id < 0) { /* !CHECKPOINT_RESTORE or next_id is unset */
- new->seq = ids->seq++;
- if (ids->seq > IPCID_SEQ_MAX)
- ids->seq = 0;
- idx = idr_alloc(&ids->ipcs_idr, new, 0, 0, GFP_NOWAIT);
+ int max_idx;
+
+ max_idx = max(ids->in_use*3/2, ipc_min_cycle);
+ max_idx = min(max_idx, ipc_mni);
+
+ /* allocate the idx, with a NULL struct kern_ipc_perm */
+ idx = idr_alloc_cyclic(&ids->ipcs_idr, NULL, 0, max_idx,
+ GFP_NOWAIT);
+
+ if (idx >= 0) {
+ /*
+ * idx got allocated successfully.
+ * Now calculate the sequence number and set the
+ * pointer for real.
+ */
+ if (idx <= ids->last_idx) {
+ ids->seq++;
+ if (ids->seq >= ipcid_seq_max())
+ ids->seq = 0;
+ }
+ ids->last_idx = idx;
+
+ new->seq = ids->seq;
+ /* no need for smp_wmb(), this is done
+ * inside idr_replace, as part of
+ * rcu_assign_pointer
+ */
+ idr_replace(&ids->ipcs_idr, new, idx);
+ }
} else {
new->seq = ipcid_to_seqx(next_id);
idx = idr_alloc(&ids->ipcs_idr, new, ipcid_to_idx(next_id),
0, GFP_NOWAIT);
}
if (idx >= 0)
- new->id = SEQ_MULTIPLIER * new->seq + idx;
+ new->id = (new->seq << ipcmni_seq_shift()) + idx;
return idx;
}
@@ -254,8 +283,8 @@
/* 1) Initialize the refcount so that ipc_rcu_putref works */
refcount_set(&new->refcount, 1);
- if (limit > IPCMNI)
- limit = IPCMNI;
+ if (limit > ipc_mni)
+ limit = ipc_mni;
if (ids->in_use >= limit)
return -ENOSPC;
@@ -738,7 +767,7 @@
if (total >= ids->in_use)
return NULL;
- for (; pos < IPCMNI; pos++) {
+ for (; pos < ipc_mni; pos++) {
ipc = idr_find(&ids->ipcs_idr, pos);
if (ipc != NULL) {
*new_pos = pos + 1;
diff --git a/ipc/util.h b/ipc/util.h
index 0a159f6..5766c61 100644
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -15,8 +15,37 @@
#include <linux/err.h>
#include <linux/ipc_namespace.h>
-#define IPCMNI 32768 /* <= MAX_INT limit for ipc arrays (including sysctl changes) */
-#define SEQ_MULTIPLIER (IPCMNI)
+/*
+ * The IPC ID contains 2 separate numbers - index and sequence number.
+ * By default,
+ * bits 0-14: index (32k, 15 bits)
+ * bits 15-30: sequence number (64k, 16 bits)
+ *
+ * When IPCMNI extension mode is turned on, the composition changes:
+ * bits 0-23: index (16M, 24 bits)
+ * bits 24-30: sequence number (128, 7 bits)
+ */
+#define IPCMNI_SHIFT 15
+#define IPCMNI_EXTEND_SHIFT 24
+#define IPCMNI_EXTEND_MIN_CYCLE (RADIX_TREE_MAP_SIZE * RADIX_TREE_MAP_SIZE)
+#define IPCMNI (1 << IPCMNI_SHIFT)
+#define IPCMNI_EXTEND (1 << IPCMNI_EXTEND_SHIFT)
+
+#ifdef CONFIG_SYSVIPC_SYSCTL
+extern int ipc_mni;
+extern int ipc_mni_shift;
+extern int ipc_min_cycle;
+
+#define ipcmni_seq_shift() ipc_mni_shift
+#define IPCMNI_IDX_MASK ((1 << ipc_mni_shift) - 1)
+
+#else /* CONFIG_SYSVIPC_SYSCTL */
+
+#define ipc_mni IPCMNI
+#define ipc_min_cycle ((int)RADIX_TREE_MAP_SIZE)
+#define ipcmni_seq_shift() IPCMNI_SHIFT
+#define IPCMNI_IDX_MASK ((1 << IPCMNI_SHIFT) - 1)
+#endif /* CONFIG_SYSVIPC_SYSCTL */
void sem_init(void);
void msg_init(void);
@@ -96,9 +125,9 @@
#define IPC_MSG_IDS 1
#define IPC_SHM_IDS 2
-#define ipcid_to_idx(id) ((id) % SEQ_MULTIPLIER)
-#define ipcid_to_seqx(id) ((id) / SEQ_MULTIPLIER)
-#define IPCID_SEQ_MAX min_t(int, INT_MAX/SEQ_MULTIPLIER, USHRT_MAX)
+#define ipcid_to_idx(id) ((id) & IPCMNI_IDX_MASK)
+#define ipcid_to_seqx(id) ((id) >> ipcmni_seq_shift())
+#define ipcid_seq_max() (INT_MAX >> ipcmni_seq_shift())
/* must be called with ids->rwsem acquired for writing */
int ipc_addid(struct ipc_ids *, struct kern_ipc_perm *, int);
@@ -123,8 +152,8 @@
if (ids->in_use == 0)
return -1;
- if (ids->in_use == IPCMNI)
- return IPCMNI - 1;
+ if (ids->in_use == ipc_mni)
+ return ipc_mni - 1;
return ids->max_idx;
}
@@ -160,10 +189,7 @@
}
}
-#ifndef CONFIG_ARCH_WANT_IPC_PARSE_VERSION
-/* On IA-64, we always use the "64-bit version" of the IPC structures. */
-# define ipc_parse_version(cmd) IPC_64
-#else
+#ifdef CONFIG_ARCH_WANT_IPC_PARSE_VERSION
int ipc_parse_version(int *cmd);
#endif
@@ -217,6 +243,15 @@
void free_ipcs(struct ipc_namespace *ns, struct ipc_ids *ids,
void (*free)(struct ipc_namespace *, struct kern_ipc_perm *));
+static inline int sem_check_semmni(struct ipc_namespace *ns) {
+ /*
+ * Check semmni range [0, ipc_mni]
+ * semmni is the last element of sem_ctls[4] array
+ */
+ return ((ns->sem_ctls[3] < 0) || (ns->sem_ctls[3] > ipc_mni))
+ ? -ERANGE : 0;
+}
+
#ifdef CONFIG_COMPAT
#include <linux/compat.h>
struct compat_ipc_perm {
@@ -237,44 +272,19 @@
static inline int compat_ipc_parse_version(int *cmd)
{
-#ifdef CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION
int version = *cmd & IPC_64;
*cmd &= ~IPC_64;
return version;
-#else
- return IPC_64;
-#endif
}
-#endif
-/* for __ARCH_WANT_SYS_IPC */
-long ksys_semtimedop(int semid, struct sembuf __user *tsops,
- unsigned int nsops,
- const struct __kernel_timespec __user *timeout);
-long ksys_semget(key_t key, int nsems, int semflg);
-long ksys_semctl(int semid, int semnum, int cmd, unsigned long arg);
-long ksys_msgget(key_t key, int msgflg);
-long ksys_msgctl(int msqid, int cmd, struct msqid_ds __user *buf);
-long ksys_msgrcv(int msqid, struct msgbuf __user *msgp, size_t msgsz,
- long msgtyp, int msgflg);
-long ksys_msgsnd(int msqid, struct msgbuf __user *msgp, size_t msgsz,
- int msgflg);
-long ksys_shmget(key_t key, size_t size, int shmflg);
-long ksys_shmdt(char __user *shmaddr);
-long ksys_shmctl(int shmid, int cmd, struct shmid_ds __user *buf);
-
-/* for CONFIG_ARCH_WANT_OLD_COMPAT_IPC */
-long compat_ksys_semtimedop(int semid, struct sembuf __user *tsems,
- unsigned int nsops,
- const struct compat_timespec __user *timeout);
-#ifdef CONFIG_COMPAT
-long compat_ksys_semctl(int semid, int semnum, int cmd, int arg);
-long compat_ksys_msgctl(int msqid, int cmd, void __user *uptr);
+long compat_ksys_old_semctl(int semid, int semnum, int cmd, int arg);
+long compat_ksys_old_msgctl(int msqid, int cmd, void __user *uptr);
long compat_ksys_msgrcv(int msqid, compat_uptr_t msgp, compat_ssize_t msgsz,
compat_long_t msgtyp, int msgflg);
long compat_ksys_msgsnd(int msqid, compat_uptr_t msgp,
compat_ssize_t msgsz, int msgflg);
-long compat_ksys_shmctl(int shmid, int cmd, void __user *uptr);
-#endif /* CONFIG_COMPAT */
+long compat_ksys_old_shmctl(int shmid, int cmd, void __user *uptr);
+
+#endif
#endif