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Subject[PATCH 08/23] sysctl ipc: Remove dead binary sysctl support code.
Date
From: Eric W. Biederman <ebiederm@xmission.com>

Now that sys_sysctl is a generic wrapper around /proc/sys .ctl_name
and .strategy members of sysctl tables are dead code. Remove them.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
---
ipc/ipc_sysctl.c | 77 ------------------------------------------------------
ipc/mq_sysctl.c | 7 ++---
2 files changed, 3 insertions(+), 81 deletions(-)
diff --git a/ipc/ipc_sysctl.c b/ipc/ipc_sysctl.c
index 7d37047..56410fa 100644
--- a/ipc/ipc_sysctl.c
+++ b/ipc/ipc_sysctl.c
@@ -129,136 +129,60 @@ static int proc_ipcauto_dointvec_minmax(ctl_table *table, int write,
#define proc_ipcauto_dointvec_minmax NULL
#endif

-#ifdef CONFIG_SYSCTL_SYSCALL
-/* The generic sysctl ipc data routine. */
-static int sysctl_ipc_data(ctl_table *table,
- void __user *oldval, size_t __user *oldlenp,
- void __user *newval, size_t newlen)
-{
- size_t len;
- void *data;
-
- /* Get out of I don't have a variable */
- if (!table->data || !table->maxlen)
- return -ENOTDIR;
-
- data = get_ipc(table);
- if (!data)
- return -ENOTDIR;
-
- if (oldval && oldlenp) {
- if (get_user(len, oldlenp))
- return -EFAULT;
- if (len) {
- if (len > table->maxlen)
- len = table->maxlen;
- if (copy_to_user(oldval, data, len))
- return -EFAULT;
- if (put_user(len, oldlenp))
- return -EFAULT;
- }
- }
-
- if (newval && newlen) {
- if (newlen > table->maxlen)
- newlen = table->maxlen;
-
- if (copy_from_user(data, newval, newlen))
- return -EFAULT;
- }
- return 1;
-}
-
-static int sysctl_ipc_registered_data(ctl_table *table,
- void __user *oldval, size_t __user *oldlenp,
- void __user *newval, size_t newlen)
-{
- int rc;
-
- rc = sysctl_ipc_data(table, oldval, oldlenp, newval, newlen);
-
- if (newval && newlen && rc > 0)
- /*
- * Tunable has successfully been changed from userland
- */
- unregister_ipcns_notifier(current->nsproxy->ipc_ns);
-
- return rc;
-}
-#else
-#define sysctl_ipc_data NULL
-#define sysctl_ipc_registered_data NULL
-#endif
-
static int zero;
static int one = 1;

static struct ctl_table ipc_kern_table[] = {
{
- .ctl_name = KERN_SHMMAX,
.procname = "shmmax",
.data = &init_ipc_ns.shm_ctlmax,
.maxlen = sizeof (init_ipc_ns.shm_ctlmax),
.mode = 0644,
.proc_handler = proc_ipc_doulongvec_minmax,
- .strategy = sysctl_ipc_data,
},
{
- .ctl_name = KERN_SHMALL,
.procname = "shmall",
.data = &init_ipc_ns.shm_ctlall,
.maxlen = sizeof (init_ipc_ns.shm_ctlall),
.mode = 0644,
.proc_handler = proc_ipc_doulongvec_minmax,
- .strategy = sysctl_ipc_data,
},
{
- .ctl_name = KERN_SHMMNI,
.procname = "shmmni",
.data = &init_ipc_ns.shm_ctlmni,
.maxlen = sizeof (init_ipc_ns.shm_ctlmni),
.mode = 0644,
.proc_handler = proc_ipc_dointvec,
- .strategy = sysctl_ipc_data,
},
{
- .ctl_name = KERN_MSGMAX,
.procname = "msgmax",
.data = &init_ipc_ns.msg_ctlmax,
.maxlen = sizeof (init_ipc_ns.msg_ctlmax),
.mode = 0644,
.proc_handler = proc_ipc_dointvec,
- .strategy = sysctl_ipc_data,
},
{
- .ctl_name = KERN_MSGMNI,
.procname = "msgmni",
.data = &init_ipc_ns.msg_ctlmni,
.maxlen = sizeof (init_ipc_ns.msg_ctlmni),
.mode = 0644,
.proc_handler = proc_ipc_callback_dointvec,
- .strategy = sysctl_ipc_registered_data,
},
{
- .ctl_name = KERN_MSGMNB,
.procname = "msgmnb",
.data = &init_ipc_ns.msg_ctlmnb,
.maxlen = sizeof (init_ipc_ns.msg_ctlmnb),
.mode = 0644,
.proc_handler = proc_ipc_dointvec,
- .strategy = sysctl_ipc_data,
},
{
- .ctl_name = KERN_SEM,
.procname = "sem",
.data = &init_ipc_ns.sem_ctls,
.maxlen = 4*sizeof (int),
.mode = 0644,
.proc_handler = proc_ipc_dointvec,
- .strategy = sysctl_ipc_data,
},
{
- .ctl_name = CTL_UNNUMBERED,
.procname = "auto_msgmni",
.data = &init_ipc_ns.auto_msgmni,
.maxlen = sizeof(int),
@@ -272,7 +196,6 @@ static struct ctl_table ipc_kern_table[] = {

static struct ctl_table ipc_root_table[] = {
{
- .ctl_name = CTL_KERN,
.procname = "kernel",
.mode = 0555,
.child = ipc_kern_table,
diff --git a/ipc/mq_sysctl.c b/ipc/mq_sysctl.c
index 8a05871..0c09366 100644
--- a/ipc/mq_sysctl.c
+++ b/ipc/mq_sysctl.c
@@ -88,7 +88,7 @@ static ctl_table mq_sysctls[] = {
.extra1 = &msg_maxsize_limit_min,
.extra2 = &msg_maxsize_limit_max,
},
- { .ctl_name = 0 }
+ {}
};

static ctl_table mq_sysctl_dir[] = {
@@ -97,17 +97,16 @@ static ctl_table mq_sysctl_dir[] = {
.mode = 0555,
.child = mq_sysctls,
},
- { .ctl_name = 0 }
+ {}
};

static ctl_table mq_sysctl_root[] = {
{
- .ctl_name = CTL_FS,
.procname = "fs",
.mode = 0555,
.child = mq_sysctl_dir,
},
- { .ctl_name = 0 }
+ {}
};

struct ctl_table_header *mq_register_sysctl_table(void)
--
1.6.5.2.143.g8cc62


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