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Diffstat (limited to 'kernel/sysctl.c')
-rw-r--r--kernel/sysctl.c116
1 files changed, 88 insertions, 28 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 476ac2522f1..a79ccf9d113 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -92,13 +92,8 @@ extern char modprobe_path[];
extern int sg_big_buff;
#endif
#ifdef CONFIG_SYSVIPC
-extern size_t shm_ctlmax;
-extern size_t shm_ctlall;
-extern int shm_ctlmni;
-extern int msg_ctlmax;
-extern int msg_ctlmnb;
-extern int msg_ctlmni;
-extern int sem_ctls[];
+static int proc_do_ipc_string(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos);
#endif
#ifdef __sparc__
@@ -481,58 +476,58 @@ static ctl_table kern_table[] = {
{
.ctl_name = KERN_SHMMAX,
.procname = "shmmax",
- .data = &shm_ctlmax,
+ .data = NULL,
.maxlen = sizeof (size_t),
.mode = 0644,
- .proc_handler = &proc_doulongvec_minmax,
+ .proc_handler = &proc_do_ipc_string,
},
{
.ctl_name = KERN_SHMALL,
.procname = "shmall",
- .data = &shm_ctlall,
+ .data = NULL,
.maxlen = sizeof (size_t),
.mode = 0644,
- .proc_handler = &proc_doulongvec_minmax,
+ .proc_handler = &proc_do_ipc_string,
},
{
.ctl_name = KERN_SHMMNI,
.procname = "shmmni",
- .data = &shm_ctlmni,
+ .data = NULL,
.maxlen = sizeof (int),
.mode = 0644,
- .proc_handler = &proc_dointvec,
+ .proc_handler = &proc_do_ipc_string,
},
{
.ctl_name = KERN_MSGMAX,
.procname = "msgmax",
- .data = &msg_ctlmax,
+ .data = NULL,
.maxlen = sizeof (int),
.mode = 0644,
- .proc_handler = &proc_dointvec,
+ .proc_handler = &proc_do_ipc_string,
},
{
.ctl_name = KERN_MSGMNI,
.procname = "msgmni",
- .data = &msg_ctlmni,
+ .data = NULL,
.maxlen = sizeof (int),
.mode = 0644,
- .proc_handler = &proc_dointvec,
+ .proc_handler = &proc_do_ipc_string,
},
{
.ctl_name = KERN_MSGMNB,
.procname = "msgmnb",
- .data = &msg_ctlmnb,
+ .data = NULL,
.maxlen = sizeof (int),
.mode = 0644,
- .proc_handler = &proc_dointvec,
+ .proc_handler = &proc_do_ipc_string,
},
{
.ctl_name = KERN_SEM,
.procname = "sem",
- .data = &sem_ctls,
+ .data = NULL,
.maxlen = 4*sizeof (int),
.mode = 0644,
- .proc_handler = &proc_dointvec,
+ .proc_handler = &proc_do_ipc_string,
},
#endif
#ifdef CONFIG_MAGIC_SYSRQ
@@ -1832,8 +1827,9 @@ static int do_proc_dointvec_conv(int *negp, unsigned long *lvalp,
return 0;
}
-static int do_proc_dointvec(ctl_table *table, int write, struct file *filp,
- void __user *buffer, size_t *lenp, loff_t *ppos,
+static int __do_proc_dointvec(void *tbl_data, ctl_table *table,
+ int write, struct file *filp, void __user *buffer,
+ size_t *lenp, loff_t *ppos,
int (*conv)(int *negp, unsigned long *lvalp, int *valp,
int write, void *data),
void *data)
@@ -1846,13 +1842,13 @@ static int do_proc_dointvec(ctl_table *table, int write, struct file *filp,
char buf[TMPBUFLEN], *p;
char __user *s = buffer;
- if (!table->data || !table->maxlen || !*lenp ||
+ if (!tbl_data || !table->maxlen || !*lenp ||
(*ppos && !write)) {
*lenp = 0;
return 0;
}
- i = (int *) table->data;
+ i = (int *) tbl_data;
vleft = table->maxlen / sizeof(*i);
left = *lenp;
@@ -1941,6 +1937,16 @@ static int do_proc_dointvec(ctl_table *table, int write, struct file *filp,
#undef TMPBUFLEN
}
+static int do_proc_dointvec(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos,
+ int (*conv)(int *negp, unsigned long *lvalp, int *valp,
+ int write, void *data),
+ void *data)
+{
+ return __do_proc_dointvec(table->data, table, write, filp,
+ buffer, lenp, ppos, conv, data);
+}
+
/**
* proc_dointvec - read a vector of integers
* @table: the sysctl table
@@ -2074,7 +2080,7 @@ int proc_dointvec_minmax(ctl_table *table, int write, struct file *filp,
do_proc_dointvec_minmax_conv, &param);
}
-static int do_proc_doulongvec_minmax(ctl_table *table, int write,
+static int __do_proc_doulongvec_minmax(void *data, ctl_table *table, int write,
struct file *filp,
void __user *buffer,
size_t *lenp, loff_t *ppos,
@@ -2088,13 +2094,13 @@ static int do_proc_doulongvec_minmax(ctl_table *table, int write,
char buf[TMPBUFLEN], *p;
char __user *s = buffer;
- if (!table->data || !table->maxlen || !*lenp ||
+ if (!data || !table->maxlen || !*lenp ||
(*ppos && !write)) {
*lenp = 0;
return 0;
}
- i = (unsigned long *) table->data;
+ i = (unsigned long *) data;
min = (unsigned long *) table->extra1;
max = (unsigned long *) table->extra2;
vleft = table->maxlen / sizeof(unsigned long);
@@ -2179,6 +2185,17 @@ static int do_proc_doulongvec_minmax(ctl_table *table, int write,
#undef TMPBUFLEN
}
+static int do_proc_doulongvec_minmax(ctl_table *table, int write,
+ struct file *filp,
+ void __user *buffer,
+ size_t *lenp, loff_t *ppos,
+ unsigned long convmul,
+ unsigned long convdiv)
+{
+ return __do_proc_doulongvec_minmax(table->data, table, write,
+ filp, buffer, lenp, ppos, convmul, convdiv);
+}
+
/**
* proc_doulongvec_minmax - read a vector of long integers with min/max values
* @table: the sysctl table
@@ -2367,6 +2384,49 @@ int proc_dointvec_ms_jiffies(ctl_table *table, int write, struct file *filp,
do_proc_dointvec_ms_jiffies_conv, NULL);
}
+#ifdef CONFIG_SYSVIPC
+static int proc_do_ipc_string(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ void *data;
+ struct ipc_namespace *ns;
+
+ ns = current->nsproxy->ipc_ns;
+
+ switch (table->ctl_name) {
+ case KERN_SHMMAX:
+ data = &ns->shm_ctlmax;
+ goto proc_minmax;
+ case KERN_SHMALL:
+ data = &ns->shm_ctlall;
+ goto proc_minmax;
+ case KERN_SHMMNI:
+ data = &ns->shm_ctlmni;
+ break;
+ case KERN_MSGMAX:
+ data = &ns->msg_ctlmax;
+ break;
+ case KERN_MSGMNI:
+ data = &ns->msg_ctlmni;
+ break;
+ case KERN_MSGMNB:
+ data = &ns->msg_ctlmnb;
+ break;
+ case KERN_SEM:
+ data = &ns->sem_ctls;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return __do_proc_dointvec(data, table, write, filp, buffer,
+ lenp, ppos, NULL, NULL);
+proc_minmax:
+ return __do_proc_doulongvec_minmax(data, table, write, filp, buffer,
+ lenp, ppos, 1l, 1l);
+}
+#endif
+
#else /* CONFIG_PROC_FS */
int proc_dostring(ctl_table *table, int write, struct file *filp,
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-01 20:44:06 +0000