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authorDavidlohr Bueso <dave@stgolabs.net>2018-08-21 22:01:56 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-08-22 10:52:52 -0700
commiteae04d25a713304c978d7c45dcab01b0e0811c74 (patch)
tree7b2dfd99330a00a7586a8b8368161df9457bcd96 /ipc
parentdc2c8c84def6ce450c63529e08c1db100020994e (diff)
downloadlinux-stericsson-eae04d25a713304c978d7c45dcab01b0e0811c74.tar.gz
ipc: simplify ipc initialization
Now that we know that rhashtable_init() will not fail, we can get rid of a lot of the unnecessary cleanup paths when the call errored out. [manfred@colorfullife.com: variable name added to util.h to resolve checkpatch warning] Link: http://lkml.kernel.org/r/20180712185241.4017-11-manfred@colorfullife.com Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Signed-off-by: Manfred Spraul <manfred@colorfullife.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Kees Cook <keescook@chromium.org> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'ipc')
-rw-r--r--ipc/msg.c9
-rw-r--r--ipc/namespace.c20
-rw-r--r--ipc/sem.c10
-rw-r--r--ipc/shm.c9
-rw-r--r--ipc/util.c18
-rw-r--r--ipc/util.h18
6 files changed, 30 insertions, 54 deletions
diff --git a/ipc/msg.c b/ipc/msg.c
index b9b47d6cd7ee..ee78dad90460 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -1238,7 +1238,7 @@ COMPAT_SYSCALL_DEFINE5(msgrcv, int, msqid, compat_uptr_t, msgp,
}
#endif
-int msg_init_ns(struct ipc_namespace *ns)
+void msg_init_ns(struct ipc_namespace *ns)
{
ns->msg_ctlmax = MSGMAX;
ns->msg_ctlmnb = MSGMNB;
@@ -1246,7 +1246,7 @@ int msg_init_ns(struct ipc_namespace *ns)
atomic_set(&ns->msg_bytes, 0);
atomic_set(&ns->msg_hdrs, 0);
- return ipc_init_ids(&ns->ids[IPC_MSG_IDS]);
+ ipc_init_ids(&ns->ids[IPC_MSG_IDS]);
}
#ifdef CONFIG_IPC_NS
@@ -1287,12 +1287,11 @@ static int sysvipc_msg_proc_show(struct seq_file *s, void *it)
}
#endif
-int __init msg_init(void)
+void __init msg_init(void)
{
- const int err = msg_init_ns(&init_ipc_ns);
+ 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);
- return err;
}
diff --git a/ipc/namespace.c b/ipc/namespace.c
index f59a89966f92..21607791d62c 100644
--- a/ipc/namespace.c
+++ b/ipc/namespace.c
@@ -55,28 +55,16 @@ static struct ipc_namespace *create_ipc_ns(struct user_namespace *user_ns,
ns->user_ns = get_user_ns(user_ns);
ns->ucounts = ucounts;
- err = sem_init_ns(ns);
+ err = mq_init_ns(ns);
if (err)
goto fail_put;
- err = msg_init_ns(ns);
- if (err)
- goto fail_destroy_sem;
- err = shm_init_ns(ns);
- if (err)
- goto fail_destroy_msg;
- err = mq_init_ns(ns);
- if (err)
- goto fail_destroy_shm;
+ sem_init_ns(ns);
+ msg_init_ns(ns);
+ shm_init_ns(ns);
return ns;
-fail_destroy_shm:
- shm_exit_ns(ns);
-fail_destroy_msg:
- msg_exit_ns(ns);
-fail_destroy_sem:
- sem_exit_ns(ns);
fail_put:
put_user_ns(ns->user_ns);
ns_free_inum(&ns->ns);
diff --git a/ipc/sem.c b/ipc/sem.c
index cf2ba4509f0d..e4df102f3404 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -221,14 +221,14 @@ static int sysvipc_sem_proc_show(struct seq_file *s, void *it);
#define sc_semopm sem_ctls[2]
#define sc_semmni sem_ctls[3]
-int sem_init_ns(struct ipc_namespace *ns)
+void sem_init_ns(struct ipc_namespace *ns)
{
ns->sc_semmsl = SEMMSL;
ns->sc_semmns = SEMMNS;
ns->sc_semopm = SEMOPM;
ns->sc_semmni = SEMMNI;
ns->used_sems = 0;
- return ipc_init_ids(&ns->ids[IPC_SEM_IDS]);
+ ipc_init_ids(&ns->ids[IPC_SEM_IDS]);
}
#ifdef CONFIG_IPC_NS
@@ -240,14 +240,12 @@ void sem_exit_ns(struct ipc_namespace *ns)
}
#endif
-int __init sem_init(void)
+void __init sem_init(void)
{
- const int err = sem_init_ns(&init_ipc_ns);
-
+ sem_init_ns(&init_ipc_ns);
ipc_init_proc_interface("sysvipc/sem",
" key semid perms nsems uid gid cuid cgid otime ctime\n",
IPC_SEM_IDS, sysvipc_sem_proc_show);
- return err;
}
/**
diff --git a/ipc/shm.c b/ipc/shm.c
index 4c7ae625d996..c4fb359f1e53 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -96,14 +96,14 @@ static void shm_destroy(struct ipc_namespace *ns, struct shmid_kernel *shp);
static int sysvipc_shm_proc_show(struct seq_file *s, void *it);
#endif
-int shm_init_ns(struct ipc_namespace *ns)
+void shm_init_ns(struct ipc_namespace *ns)
{
ns->shm_ctlmax = SHMMAX;
ns->shm_ctlall = SHMALL;
ns->shm_ctlmni = SHMMNI;
ns->shm_rmid_forced = 0;
ns->shm_tot = 0;
- return ipc_init_ids(&shm_ids(ns));
+ ipc_init_ids(&shm_ids(ns));
}
/*
@@ -136,9 +136,8 @@ void shm_exit_ns(struct ipc_namespace *ns)
static int __init ipc_ns_init(void)
{
- const int err = shm_init_ns(&init_ipc_ns);
- WARN(err, "ipc: sysv shm_init_ns failed: %d\n", err);
- return err;
+ shm_init_ns(&init_ipc_ns);
+ return 0;
}
pure_initcall(ipc_ns_init);
diff --git a/ipc/util.c b/ipc/util.c
index 7c1387c9510d..a2aae8c1410d 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -88,16 +88,12 @@ struct ipc_proc_iface {
*/
static int __init ipc_init(void)
{
- int err_sem, err_msg;
-
proc_mkdir("sysvipc", NULL);
- err_sem = sem_init();
- WARN(err_sem, "ipc: sysv sem_init failed: %d\n", err_sem);
- err_msg = msg_init();
- WARN(err_msg, "ipc: sysv msg_init failed: %d\n", err_msg);
+ sem_init();
+ msg_init();
shm_init();
- return err_msg ? err_msg : err_sem;
+ return 0;
}
device_initcall(ipc_init);
@@ -116,21 +112,17 @@ static const struct rhashtable_params ipc_kht_params = {
* Set up the sequence range to use for the ipc identifier range (limited
* below IPCMNI) then initialise the keys hashtable and ids idr.
*/
-int ipc_init_ids(struct ipc_ids *ids)
+void ipc_init_ids(struct ipc_ids *ids)
{
- int err;
ids->in_use = 0;
ids->seq = 0;
init_rwsem(&ids->rwsem);
- err = rhashtable_init(&ids->key_ht, &ipc_kht_params);
- if (err)
- return err;
+ rhashtable_init(&ids->key_ht, &ipc_kht_params);
idr_init(&ids->ipcs_idr);
ids->max_id = -1;
#ifdef CONFIG_CHECKPOINT_RESTORE
ids->next_id = -1;
#endif
- return 0;
}
#ifdef CONFIG_PROC_FS
diff --git a/ipc/util.h b/ipc/util.h
index e3c47b21db93..6c5c77c61f85 100644
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -18,8 +18,8 @@
#define IPCMNI 32768 /* <= MAX_INT limit for ipc arrays (including sysctl changes) */
#define SEQ_MULTIPLIER (IPCMNI)
-int sem_init(void);
-int msg_init(void);
+void sem_init(void);
+void msg_init(void);
void shm_init(void);
struct ipc_namespace;
@@ -34,17 +34,17 @@ static inline void mq_put_mnt(struct ipc_namespace *ns) { }
#endif
#ifdef CONFIG_SYSVIPC
-int sem_init_ns(struct ipc_namespace *ns);
-int msg_init_ns(struct ipc_namespace *ns);
-int shm_init_ns(struct ipc_namespace *ns);
+void sem_init_ns(struct ipc_namespace *ns);
+void msg_init_ns(struct ipc_namespace *ns);
+void shm_init_ns(struct ipc_namespace *ns);
void sem_exit_ns(struct ipc_namespace *ns);
void msg_exit_ns(struct ipc_namespace *ns);
void shm_exit_ns(struct ipc_namespace *ns);
#else
-static inline int sem_init_ns(struct ipc_namespace *ns) { return 0; }
-static inline int msg_init_ns(struct ipc_namespace *ns) { return 0; }
-static inline int shm_init_ns(struct ipc_namespace *ns) { return 0; }
+static inline void sem_init_ns(struct ipc_namespace *ns) { }
+static inline void msg_init_ns(struct ipc_namespace *ns) { }
+static inline void shm_init_ns(struct ipc_namespace *ns) { }
static inline void sem_exit_ns(struct ipc_namespace *ns) { }
static inline void msg_exit_ns(struct ipc_namespace *ns) { }
@@ -83,7 +83,7 @@ struct ipc_ops {
struct seq_file;
struct ipc_ids;
-int ipc_init_ids(struct ipc_ids *);
+void ipc_init_ids(struct ipc_ids *ids);
#ifdef CONFIG_PROC_FS
void __init ipc_init_proc_interface(const char *path, const char *header,
int ids, int (*show)(struct seq_file *, void *));