#include <linux/msg.h>
#include "util.h"
-static void *get_ipc(ctl_table *table)
+static void *get_ipc(struct ctl_table *table)
{
char *which = table->data;
struct ipc_namespace *ipc_ns = current->nsproxy->ipc_ns;
}
#ifdef CONFIG_PROC_SYSCTL
-static int proc_ipc_dointvec(ctl_table *table, int write,
+static int proc_ipc_dointvec(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
struct ctl_table ipc_table;
return proc_dointvec(&ipc_table, write, buffer, lenp, ppos);
}
-static int proc_ipc_dointvec_minmax(ctl_table *table, int write,
+static int proc_ipc_dointvec_minmax(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
struct ctl_table ipc_table;
return proc_dointvec_minmax(&ipc_table, write, buffer, lenp, ppos);
}
-static int proc_ipc_dointvec_minmax_orphans(ctl_table *table, int write,
+static int proc_ipc_dointvec_minmax_orphans(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
struct ipc_namespace *ns = current->nsproxy->ipc_ns;
return err;
}
-static int proc_ipc_callback_dointvec_minmax(ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- struct ctl_table ipc_table;
- size_t lenp_bef = *lenp;
- int rc;
-
- memcpy(&ipc_table, table, sizeof(ipc_table));
- ipc_table.data = get_ipc(table);
-
- rc = proc_dointvec_minmax(&ipc_table, write, buffer, lenp, ppos);
-
- if (write && !rc && lenp_bef == *lenp)
- /*
- * Tunable has successfully been changed by hand. Disable its
- * automatic adjustment. This simply requires unregistering
- * the notifiers that trigger recalculation.
- */
- unregister_ipcns_notifier(current->nsproxy->ipc_ns);
-
- return rc;
-}
-
-static int proc_ipc_doulongvec_minmax(ctl_table *table, int write,
+static int proc_ipc_doulongvec_minmax(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
struct ctl_table ipc_table;
lenp, ppos);
}
-/*
- * Routine that is called when the file "auto_msgmni" has successfully been
- * written.
- * Two values are allowed:
- * 0: unregister msgmni's callback routine from the ipc namespace notifier
- * chain. This means that msgmni won't be recomputed anymore upon memory
- * add/remove or ipc namespace creation/removal.
- * 1: register back the callback routine.
- */
-static void ipc_auto_callback(int val)
-{
- if (!val)
- unregister_ipcns_notifier(current->nsproxy->ipc_ns);
- else {
- /*
- * Re-enable automatic recomputing only if not already
- * enabled.
- */
- recompute_msgmni(current->nsproxy->ipc_ns);
- cond_register_ipcns_notifier(current->nsproxy->ipc_ns);
- }
-}
-
-static int proc_ipcauto_dointvec_minmax(ctl_table *table, int write,
+static int proc_ipc_auto_msgmni(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
struct ctl_table ipc_table;
- int oldval;
- int rc;
+ int dummy = 0;
memcpy(&ipc_table, table, sizeof(ipc_table));
- ipc_table.data = get_ipc(table);
- oldval = *((int *)(ipc_table.data));
+ ipc_table.data = &dummy;
- rc = proc_dointvec_minmax(&ipc_table, write, buffer, lenp, ppos);
+ if (write)
+ pr_info_once("writing to auto_msgmni has no effect");
- if (write && !rc) {
- int newval = *((int *)(ipc_table.data));
- /*
- * The file "auto_msgmni" has correctly been set.
- * React by (un)registering the corresponding tunable, if the
- * value has changed.
- */
- if (newval != oldval)
- ipc_auto_callback(newval);
- }
-
- return rc;
+ return proc_dointvec_minmax(&ipc_table, write, buffer, lenp, ppos);
}
#else
#define proc_ipc_dointvec NULL
#define proc_ipc_dointvec_minmax NULL
#define proc_ipc_dointvec_minmax_orphans NULL
-#define proc_ipc_callback_dointvec_minmax NULL
-#define proc_ipcauto_dointvec_minmax NULL
+#define proc_ipc_auto_msgmni NULL
#endif
static int zero;
{
.procname = "shmmax",
.data = &init_ipc_ns.shm_ctlmax,
- .maxlen = sizeof (init_ipc_ns.shm_ctlmax),
+ .maxlen = sizeof(init_ipc_ns.shm_ctlmax),
.mode = 0644,
.proc_handler = proc_ipc_doulongvec_minmax,
},
{
.procname = "shmall",
.data = &init_ipc_ns.shm_ctlall,
- .maxlen = sizeof (init_ipc_ns.shm_ctlall),
+ .maxlen = sizeof(init_ipc_ns.shm_ctlall),
.mode = 0644,
.proc_handler = proc_ipc_doulongvec_minmax,
},
{
.procname = "shmmni",
.data = &init_ipc_ns.shm_ctlmni,
- .maxlen = sizeof (init_ipc_ns.shm_ctlmni),
+ .maxlen = sizeof(init_ipc_ns.shm_ctlmni),
.mode = 0644,
.proc_handler = proc_ipc_dointvec,
},
{
.procname = "msgmax",
.data = &init_ipc_ns.msg_ctlmax,
- .maxlen = sizeof (init_ipc_ns.msg_ctlmax),
+ .maxlen = sizeof(init_ipc_ns.msg_ctlmax),
.mode = 0644,
.proc_handler = proc_ipc_dointvec_minmax,
.extra1 = &zero,
{
.procname = "msgmni",
.data = &init_ipc_ns.msg_ctlmni,
- .maxlen = sizeof (init_ipc_ns.msg_ctlmni),
+ .maxlen = sizeof(init_ipc_ns.msg_ctlmni),
.mode = 0644,
- .proc_handler = proc_ipc_callback_dointvec_minmax,
+ .proc_handler = proc_ipc_dointvec_minmax,
.extra1 = &zero,
.extra2 = &int_max,
},
+ {
+ .procname = "auto_msgmni",
+ .data = NULL,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_ipc_auto_msgmni,
+ .extra1 = &zero,
+ .extra2 = &one,
+ },
{
.procname = "msgmnb",
.data = &init_ipc_ns.msg_ctlmnb,
- .maxlen = sizeof (init_ipc_ns.msg_ctlmnb),
+ .maxlen = sizeof(init_ipc_ns.msg_ctlmnb),
.mode = 0644,
.proc_handler = proc_ipc_dointvec_minmax,
.extra1 = &zero,
{
.procname = "sem",
.data = &init_ipc_ns.sem_ctls,
- .maxlen = 4*sizeof (int),
+ .maxlen = 4*sizeof(int),
.mode = 0644,
.proc_handler = proc_ipc_dointvec,
},
- {
- .procname = "auto_msgmni",
- .data = &init_ipc_ns.auto_msgmni,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_ipcauto_dointvec_minmax,
- .extra1 = &zero,
- .extra2 = &one,
- },
#ifdef CONFIG_CHECKPOINT_RESTORE
{
.procname = "sem_next_id",
return 0;
}
-__initcall(ipc_sysctl_init);
+device_initcall(ipc_sysctl_init);
projects / firefly-linux-kernel-4.4.55.git / blobdiff