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-rw-r--r--arch/ia64/ia32/sys_ia32.c2
-rw-r--r--arch/mips/kernel/linux32.c4
-rw-r--r--arch/powerpc/kernel/sys_ppc32.c2
-rw-r--r--arch/s390/kernel/compat_linux.c2
-rw-r--r--arch/sparc64/kernel/sys_sparc32.c2
-rw-r--r--arch/x86_64/ia32/sys_ia32.c2
-rw-r--r--fs/Kconfig19
-rw-r--r--init/Kconfig31
-rw-r--r--kernel/sysctl.c113
9 files changed, 81 insertions, 96 deletions
diff --git a/arch/ia64/ia32/sys_ia32.c b/arch/ia64/ia32/sys_ia32.c
index 6aa3c51619c..bddbd22706e 100644
--- a/arch/ia64/ia32/sys_ia32.c
+++ b/arch/ia64/ia32/sys_ia32.c
@@ -1942,7 +1942,7 @@ struct sysctl32 {
unsigned int __unused[4];
};
-#ifdef CONFIG_SYSCTL
+#ifdef CONFIG_SYSCTL_SYSCALL
asmlinkage long
sys32_sysctl (struct sysctl32 __user *args)
{
diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index dc500e20cf1..43b1162d714 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -991,7 +991,7 @@ struct sysctl_args32
unsigned int __unused[4];
};
-#ifdef CONFIG_SYSCTL
+#ifdef CONFIG_SYSCTL_SYSCALL
asmlinkage long sys32_sysctl(struct sysctl_args32 __user *args)
{
@@ -1032,7 +1032,7 @@ asmlinkage long sys32_sysctl(struct sysctl_args32 __user *args)
return error;
}
-#endif /* CONFIG_SYSCTL */
+#endif /* CONFIG_SYSCTL_SYSCALL */
asmlinkage long sys32_newuname(struct new_utsname __user * name)
{
diff --git a/arch/powerpc/kernel/sys_ppc32.c b/arch/powerpc/kernel/sys_ppc32.c
index 2e292863e98..5e391fc2534 100644
--- a/arch/powerpc/kernel/sys_ppc32.c
+++ b/arch/powerpc/kernel/sys_ppc32.c
@@ -740,7 +740,7 @@ asmlinkage long compat_sys_umask(u32 mask)
return sys_umask((int)mask);
}
-#ifdef CONFIG_SYSCTL
+#ifdef CONFIG_SYSCTL_SYSCALL
struct __sysctl_args32 {
u32 name;
int nlen;
diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
index 785c9f70ac9..91b2884fa5c 100644
--- a/arch/s390/kernel/compat_linux.c
+++ b/arch/s390/kernel/compat_linux.c
@@ -708,7 +708,7 @@ asmlinkage long sys32_sendfile64(int out_fd, int in_fd,
return ret;
}
-#ifdef CONFIG_SYSCTL
+#ifdef CONFIG_SYSCTL_SYSCALL
struct __sysctl_args32 {
u32 name;
int nlen;
diff --git a/arch/sparc64/kernel/sys_sparc32.c b/arch/sparc64/kernel/sys_sparc32.c
index c88ae23ce81..69444f266e2 100644
--- a/arch/sparc64/kernel/sys_sparc32.c
+++ b/arch/sparc64/kernel/sys_sparc32.c
@@ -1016,7 +1016,7 @@ struct __sysctl_args32 {
asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
{
-#ifndef CONFIG_SYSCTL
+#ifndef CONFIG_SYSCTL_SYSCALL
return -ENOSYS;
#else
struct __sysctl_args32 tmp;
diff --git a/arch/x86_64/ia32/sys_ia32.c b/arch/x86_64/ia32/sys_ia32.c
index b0e82c7947d..f280d3665f4 100644
--- a/arch/x86_64/ia32/sys_ia32.c
+++ b/arch/x86_64/ia32/sys_ia32.c
@@ -648,7 +648,7 @@ sys32_pause(void)
}
-#ifdef CONFIG_SYSCTL
+#ifdef CONFIG_SYSCTL_SYSCALL
struct sysctl_ia32 {
unsigned int name;
int nlen;
diff --git a/fs/Kconfig b/fs/Kconfig
index a27002668bd..d311198bba4 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -826,6 +826,25 @@ config PROC_VMCORE
help
Exports the dump image of crashed kernel in ELF format.
+config PROC_SYSCTL
+ bool "Sysctl support (/proc/sys)" if EMBEDDED
+ depends on PROC_FS
+ select SYSCTL
+ default y
+ ---help---
+ The sysctl interface provides a means of dynamically changing
+ certain kernel parameters and variables on the fly without requiring
+ a recompile of the kernel or reboot of the system. The primary
+ interface is through /proc/sys. If you say Y here a tree of
+ modifiable sysctl entries will be generated beneath the
+ /proc/sys directory. They are explained in the files
+ in <file:Documentation/sysctl/>. Note that enabling this
+ option will enlarge the kernel by at least 8 KB.
+
+ As it is generally a good thing, you should say Y here unless
+ building a kernel for install/rescue disks or your system is very
+ limited in memory.
+
config SYSFS
bool "sysfs file system support" if EMBEDDED
default y
diff --git a/init/Kconfig b/init/Kconfig
index 9a7656f0b5e..4381006dd66 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -273,21 +273,24 @@ config UID16
This enables the legacy 16-bit UID syscall wrappers.
config SYSCTL
- bool "Sysctl support" if EMBEDDED
- default y
+ bool
+
+config SYSCTL_SYSCALL
+ bool "Sysctl syscall support"
+ default n
+ select SYSCTL
---help---
- The sysctl interface provides a means of dynamically changing
- certain kernel parameters and variables on the fly without requiring
- a recompile of the kernel or reboot of the system. The primary
- interface consists of a system call, but if you say Y to "/proc
- file system support", a tree of modifiable sysctl entries will be
- generated beneath the /proc/sys directory. They are explained in the
- files in <file:Documentation/sysctl/>. Note that enabling this
- option will enlarge the kernel by at least 8 KB.
-
- As it is generally a good thing, you should say Y here unless
- building a kernel for install/rescue disks or your system is very
- limited in memory.
+ Enable the deprecated sysctl system call. sys_sysctl uses
+ binary paths that have been found to be a major pain to maintain
+ and use. The interface in /proc/sys is now the primary and what
+ everyone uses.
+
+ Nothing has been using the binary sysctl interface for some time
+ time now so nothing should break if you disable sysctl syscall
+ support, and you kernel will get marginally smaller.
+
+ Unless you have an application that uses the sys_syscall interface
+ you should probably say N here.
config KALLSYMS
bool "Load all symbols for debugging/kksymoops" if EMBEDDED
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index bcb3a181dbb..8bfa7d117c5 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -137,8 +137,11 @@ extern int no_unaligned_warning;
extern int max_lock_depth;
#endif
-static int parse_table(int __user *, int, void __user *, size_t __user *, void __user *, size_t,
- ctl_table *, void **);
+#ifdef CONFIG_SYSCTL_SYSCALL
+static int parse_table(int __user *, int, void __user *, size_t __user *,
+ void __user *, size_t, ctl_table *, void **);
+#endif
+
static int proc_doutsstring(ctl_table *table, int write, struct file *filp,
void __user *buffer, size_t *lenp, loff_t *ppos);
@@ -165,7 +168,7 @@ int sysctl_legacy_va_layout;
/* /proc declarations: */
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_PROC_SYSCTL
static ssize_t proc_readsys(struct file *, char __user *, size_t, loff_t *);
static ssize_t proc_writesys(struct file *, const char __user *, size_t, loff_t *);
@@ -1166,12 +1169,13 @@ static void start_unregistering(struct ctl_table_header *p)
void __init sysctl_init(void)
{
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_PROC_SYSCTL
register_proc_table(root_table, proc_sys_root, &root_table_header);
init_irq_proc();
#endif
}
+#ifdef CONFIG_SYSCTL_SYSCALL
int do_sysctl(int __user *name, int nlen, void __user *oldval, size_t __user *oldlenp,
void __user *newval, size_t newlen)
{
@@ -1225,6 +1229,7 @@ asmlinkage long sys_sysctl(struct __sysctl_args __user *args)
unlock_kernel();
return error;
}
+#endif /* CONFIG_SYSCTL_SYSCALL */
/*
* ctl_perm does NOT grant the superuser all rights automatically, because
@@ -1251,6 +1256,7 @@ static inline int ctl_perm(ctl_table *table, int op)
return test_perm(table->mode, op);
}
+#ifdef CONFIG_SYSCTL_SYSCALL
static int parse_table(int __user *name, int nlen,
void __user *oldval, size_t __user *oldlenp,
void __user *newval, size_t newlen,
@@ -1340,6 +1346,7 @@ int do_sysctl_strategy (ctl_table *table,
}
return 0;
}
+#endif /* CONFIG_SYSCTL_SYSCALL */
/**
* register_sysctl_table - register a sysctl hierarchy
@@ -1427,7 +1434,7 @@ struct ctl_table_header *register_sysctl_table(ctl_table * table,
else
list_add_tail(&tmp->ctl_entry, &root_table_header.ctl_entry);
spin_unlock(&sysctl_lock);
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_PROC_SYSCTL
register_proc_table(table, proc_sys_root, tmp);
#endif
return tmp;
@@ -1445,18 +1452,31 @@ void unregister_sysctl_table(struct ctl_table_header * header)
might_sleep();
spin_lock(&sysctl_lock);
start_unregistering(header);
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_PROC_SYSCTL
unregister_proc_table(header->ctl_table, proc_sys_root);
#endif
spin_unlock(&sysctl_lock);
kfree(header);
}
+#else /* !CONFIG_SYSCTL */
+struct ctl_table_header * register_sysctl_table(ctl_table * table,
+ int insert_at_head)
+{
+ return NULL;
+}
+
+void unregister_sysctl_table(struct ctl_table_header * table)
+{
+}
+
+#endif /* CONFIG_SYSCTL */
+
/*
* /proc/sys support
*/
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_PROC_SYSCTL
/* Scan the sysctl entries in table and add them all into /proc */
static void register_proc_table(ctl_table * table, struct proc_dir_entry *root, void *set)
@@ -2318,6 +2338,7 @@ int proc_doulongvec_ms_jiffies_minmax(ctl_table *table, int write,
#endif /* CONFIG_PROC_FS */
+#ifdef CONFIG_SYSCTL_SYSCALL
/*
* General sysctl support routines
*/
@@ -2460,11 +2481,19 @@ int sysctl_ms_jiffies(ctl_table *table, int __user *name, int nlen,
return 1;
}
-#else /* CONFIG_SYSCTL */
+#else /* CONFIG_SYSCTL_SYSCALL */
asmlinkage long sys_sysctl(struct __sysctl_args __user *args)
{
+ static int msg_count;
+
+ if (msg_count < 5) {
+ msg_count++;
+ printk(KERN_INFO
+ "warning: process `%s' used the removed sysctl "
+ "system call\n", current->comm);
+ }
return -ENOSYS;
}
@@ -2496,73 +2525,7 @@ int sysctl_ms_jiffies(ctl_table *table, int __user *name, int nlen,
return -ENOSYS;
}
-int proc_dostring(ctl_table *table, int write, struct file *filp,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- return -ENOSYS;
-}
-
-int proc_dointvec(ctl_table *table, int write, struct file *filp,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- return -ENOSYS;
-}
-
-int proc_dointvec_bset(ctl_table *table, int write, struct file *filp,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- return -ENOSYS;
-}
-
-int proc_dointvec_minmax(ctl_table *table, int write, struct file *filp,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- return -ENOSYS;
-}
-
-int proc_dointvec_jiffies(ctl_table *table, int write, struct file *filp,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- return -ENOSYS;
-}
-
-int proc_dointvec_userhz_jiffies(ctl_table *table, int write, struct file *filp,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- return -ENOSYS;
-}
-
-int proc_dointvec_ms_jiffies(ctl_table *table, int write, struct file *filp,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- return -ENOSYS;
-}
-
-int proc_doulongvec_minmax(ctl_table *table, int write, struct file *filp,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- return -ENOSYS;
-}
-
-int proc_doulongvec_ms_jiffies_minmax(ctl_table *table, int write,
- struct file *filp,
- void __user *buffer,
- size_t *lenp, loff_t *ppos)
-{
- return -ENOSYS;
-}
-
-struct ctl_table_header * register_sysctl_table(ctl_table * table,
- int insert_at_head)
-{
- return NULL;
-}
-
-void unregister_sysctl_table(struct ctl_table_header * table)
-{
-}
-
-#endif /* CONFIG_SYSCTL */
+#endif /* CONFIG_SYSCTL_SYSCALL */
/*
* No sense putting this after each symbol definition, twice,
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-30 23:03:08 +0000