The patch titled
sysctl: Allow /proc/sys without sys_sysctl
has been added to the -mm tree. Its filename is
sysctl-allow-proc-sys-without-sys_sysctl.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: sysctl: Allow /proc/sys without sys_sysctl
From: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Since sys_sysctl is deprecated start allow it to be compiled out. This
should catch any remaining user space code that cares, and paves the way
for further sysctl cleanups.
Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
arch/ia64/ia32/sys_ia32.c | 2
arch/mips/kernel/linux32.c | 4 -
arch/powerpc/kernel/sys_ppc32.c | 2
arch/s390/kernel/compat_linux.c | 2
arch/sparc64/kernel/sys_sparc32.c | 2
arch/x86_64/ia32/sys_ia32.c | 2
fs/Kconfig | 19 +++++
init/Kconfig | 31 ++++----
kernel/sysctl.c | 105 ++++++++--------------------
9 files changed, 73 insertions(+), 96 deletions(-)
diff -puN arch/ia64/ia32/sys_ia32.c~sysctl-allow-proc-sys-without-sys_sysctl arch/ia64/ia32/sys_ia32.c
--- a/arch/ia64/ia32/sys_ia32.c~sysctl-allow-proc-sys-without-sys_sysctl
+++ a/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 -puN arch/mips/kernel/linux32.c~sysctl-allow-proc-sys-without-sys_sysctl arch/mips/kernel/linux32.c
--- a/arch/mips/kernel/linux32.c~sysctl-allow-proc-sys-without-sys_sysctl
+++ a/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 sysc
return error;
}
-#endif /* CONFIG_SYSCTL */
+#endif /* CONFIG_SYSCTL_SYSCALL */
asmlinkage long sys32_newuname(struct new_utsname __user * name)
{
diff -puN arch/powerpc/kernel/sys_ppc32.c~sysctl-allow-proc-sys-without-sys_sysctl arch/powerpc/kernel/sys_ppc32.c
--- a/arch/powerpc/kernel/sys_ppc32.c~sysctl-allow-proc-sys-without-sys_sysctl
+++ a/arch/powerpc/kernel/sys_ppc32.c
@@ -740,7 +740,7 @@ asmlinkage long compat_sys_umask(u32 mas
return sys_umask((int)mask);
}
-#ifdef CONFIG_SYSCTL
+#ifdef CONFIG_SYSCTL_SYSCALL
struct __sysctl_args32 {
u32 name;
int nlen;
diff -puN arch/s390/kernel/compat_linux.c~sysctl-allow-proc-sys-without-sys_sysctl arch/s390/kernel/compat_linux.c
--- a/arch/s390/kernel/compat_linux.c~sysctl-allow-proc-sys-without-sys_sysctl
+++ a/arch/s390/kernel/compat_linux.c
@@ -703,7 +703,7 @@ asmlinkage long sys32_sendfile64(int out
return ret;
}
-#ifdef CONFIG_SYSCTL
+#ifdef CONFIG_SYSCTL_SYSCALL
struct __sysctl_args32 {
u32 name;
int nlen;
diff -puN arch/sparc64/kernel/sys_sparc32.c~sysctl-allow-proc-sys-without-sys_sysctl arch/sparc64/kernel/sys_sparc32.c
--- a/arch/sparc64/kernel/sys_sparc32.c~sysctl-allow-proc-sys-without-sys_sysctl
+++ a/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 -puN arch/x86_64/ia32/sys_ia32.c~sysctl-allow-proc-sys-without-sys_sysctl arch/x86_64/ia32/sys_ia32.c
--- a/arch/x86_64/ia32/sys_ia32.c~sysctl-allow-proc-sys-without-sys_sysctl
+++ a/arch/x86_64/ia32/sys_ia32.c
@@ -645,7 +645,7 @@ sys32_pause(void)
}
-#ifdef CONFIG_SYSCTL
+#ifdef CONFIG_SYSCTL_SYSCALL
struct sysctl_ia32 {
unsigned int name;
int nlen;
diff -puN fs/Kconfig~sysctl-allow-proc-sys-without-sys_sysctl fs/Kconfig
--- a/fs/Kconfig~sysctl-allow-proc-sys-without-sys_sysctl
+++ a/fs/Kconfig
@@ -827,6 +827,25 @@ 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 -puN init/Kconfig~sysctl-allow-proc-sys-without-sys_sysctl init/Kconfig
--- a/init/Kconfig~sysctl-allow-proc-sys-without-sys_sysctl
+++ a/init/Kconfig
@@ -159,21 +159,24 @@ config BSD_PROCESS_ACCT_V3
at <http://www.physik3.uni-rostock.de/tim/kernel/utils/acct/>.
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 AUDIT
bool "Auditing support"
diff -puN kernel/sysctl.c~sysctl-allow-proc-sys-without-sys_sysctl kernel/sysctl.c
--- a/kernel/sysctl.c~sysctl-allow-proc-sys-without-sys_sysctl
+++ a/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 *);
@@ -1155,12 +1158,13 @@ static void start_unregistering(struct c
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)
{
@@ -1214,6 +1218,7 @@ asmlinkage long sys_sysctl(struct __sysc
unlock_kernel();
return error;
}
+#endif /* CONFIG_SYSCTL_SYSCALL */
/*
* ctl_perm does NOT grant the superuser all rights automatically, because
@@ -1240,6 +1245,7 @@ static inline int ctl_perm(ctl_table *ta
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,
@@ -1329,6 +1335,7 @@ int do_sysctl_strategy (ctl_table *table
}
return 0;
}
+#endif /* CONFIG_SYSCTL_SYSCALL */
/**
* register_sysctl_table - register a sysctl hierarchy
@@ -1416,7 +1423,7 @@ struct ctl_table_header *register_sysctl
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;
@@ -1434,18 +1441,31 @@ void unregister_sysctl_table(struct ctl_
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)
@@ -2307,6 +2327,7 @@ int proc_doulongvec_ms_jiffies_minmax(ct
#endif /* CONFIG_PROC_FS */
+#ifdef CONFIG_SYSCTL_SYSCALL
/*
* General sysctl support routines
*/
@@ -2449,7 +2470,7 @@ int sysctl_ms_jiffies(ctl_table *table,
return 1;
}
-#else /* CONFIG_SYSCTL */
+#else /* CONFIG_SYSCTL_SYSCALL */
asmlinkage long sys_sysctl(struct __sysctl_args __user *args)
@@ -2485,73 +2506,7 @@ int sysctl_ms_jiffies(ctl_table *table,
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,
_
Patches currently in -mm which might be from ebiederm@xxxxxxxxxxxx are
i386-kexec-allow-the-kexec-on-panic-support-to-compile-on-voyager.patch
msi-only-keep-one-msi_desc-in-each-slab-entry.patch
msi-use-kmem_cache_zalloc.patch
sysctl-allow-proc-sys-without-sys_sysctl.patch
proc-sysctl-add-_proc_do_string-helper.patch
namespaces-add-nsproxy.patch
namespaces-add-nsproxy-dont-include-compileh.patch
namespaces-incorporate-fs-namespace-into-nsproxy.patch
namespaces-utsname-introduce-temporary-helpers.patch
namespaces-utsname-switch-to-using-uts-namespaces.patch
namespaces-utsname-use-init_utsname-when-appropriate.patch
namespaces-utsname-implement-utsname-namespaces.patch
namespaces-utsname-sysctl-hack.patch
namespaces-utsname-remove-system_utsname.patch
namespaces-utsname-implement-clone_newuts-flag.patch
uts-copy-nsproxy-only-when-needed.patch
ipc-namespace-core.patch
ipc-namespace-utils.patch
genirq-irq-convert-the-move_irq-flag-from-a-32bit-word-to-a-single-bit.patch
genirq-irq-add-moved_masked_irq.patch
genirq-x86_64-irq-reenable-migrating-irqs-to-other-cpus.patch
genirq-msi-simplify-msi-enable-and-disable.patch
genirq-msi-make-the-msi-boolean-tests-return-either-0-or-1.patch
genirq-msi-implement-helper-functions-read_msi_msg-and-write_msi_msg.patch
genirq-msi-refactor-the-msi_ops.patch
genirq-msi-simplify-the-msi-irq-limit-policy.patch
genirq-irq-add-a-dynamic-irq-creation-api.patch
genirq-ia64-irq-dynamic-irq-support.patch
genirq-i386-irq-dynamic-irq-support.patch
genirq-x86_64-irq-dynamic-irq-support.patch
genirq-msi-make-the-msi-code-irq-based-and-not-vector-based.patch
genirq-x86_64-irq-move-msi-message-composition-into-io_apicc.patch
genirq-i386-irq-move-msi-message-composition-into-io_apicc.patch
genirq-msi-only-build-msi-apicc-on-ia64.patch
genirq-msi-only-build-msi-apicc-on-ia64-fix.patch
genirq-x86_64-irq-remove-the-msi-assumption-that-irq-==-vector.patch
genirq-i386-irq-remove-the-msi-assumption-that-irq-==-vector.patch
genirq-irq-remove-msi-hacks.patch
genirq-irq-generalize-the-check-for-hardirq_bits.patch
genirq-x86_64-irq-make-the-external-irq-handlers-report-their-vector-not-the-irq-number.patch
genirq-x86_64-irq-make-vector_irq-per-cpu.patch
genirq-x86_64-irq-kill-gsi_irq_sharing.patch
genirq-x86_64-irq-kill-irq-compression.patch
add-hypertransport-capability-defines.patch
add-hypertransport-capability-defines-fix.patch
initial-generic-hypertransport-interrupt-support.patch
pidhash-temporary-debug-checks.patch
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