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authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-20 21:25:57 +0100
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 20:15:27 +0200
commit078faac9e8b6c8124bc012bbf97cca59caf6d4ea (patch)
tree565af5f9110fd70f649f41af3b296077fd3aa646 /ipc/util.h
parentipc: add msgctl syscall/compat_syscall wrappers (diff)
downloadlinux-dev-078faac9e8b6c8124bc012bbf97cca59caf6d4ea.tar.xz
linux-dev-078faac9e8b6c8124bc012bbf97cca59caf6d4ea.zip
ipc: add msgrcv syscall/compat_syscall wrappers
Provide ksys_msgrcv() and compat_ksys_msgrcv() wrappers to avoid in-kernel calls to these syscalls. The ksys_ prefix denotes that these functions are meant as a drop-in replacement for the syscalls. In particular, they use the same calling convention as sys_msgrcv() and compat_sys_msgrcv(). This patch is part of a series which removes in-kernel calls to syscalls. On this basis, the syscall entry path can be streamlined. For details, see http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'ipc/util.h')
-rw-r--r--ipc/util.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/ipc/util.h b/ipc/util.h
index 47837b4af3f2..c16aceb1bdec 100644
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -244,6 +244,8 @@ 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_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);
@@ -255,6 +257,8 @@ long compat_ksys_semtimedop(int semid, struct sembuf __user *tsems,
const struct compat_timespec __user *timeout);
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_msgrcv(int msqid, compat_uptr_t msgp, compat_ssize_t msgsz,
+ compat_long_t msgtyp, int msgflg);
long compat_ksys_shmctl(int shmid, int cmd, void __user *uptr);
#endif /* CONFIG_COMPAT */