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linux/kernel/sysctl_binary.c

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sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
#include <linux/stat.h>
#include <linux/sysctl.h>
xfs: remove subdirectories Use the move from Linux 2.6 to Linux 3.x as an excuse to kill the annoying subdirectories in the XFS source code. Besides the large amount of file rename the only changes are to the Makefile, a few files including headers with the subdirectory prefix, and the binary sysctl compat code that includes a header under fs/xfs/ from kernel/. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2011-08-13 05:21:35 +08:00
#include "../fs/xfs/xfs_sysctl.h"
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
#include <linux/sunrpc/debug.h>
#include <linux/string.h>
#include <linux/syscalls.h>
#include <linux/namei.h>
#include <linux/mount.h>
#include <linux/fs.h>
#include <linux/nsproxy.h>
#include <linux/pid_namespace.h>
#include <linux/file.h>
#include <linux/ctype.h>
sysctl: sysctl_binary.c Fix compilation when !CONFIG_NET dev_get_by_index does not exist when the network stack is not compiled in, so only include the code to follow wild card paths when the network stack is present. I have shuffled the code around a little to make it clear that dev_put is called after dev_get_by_index showing that there is no leak. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-12 16:35:55 +08:00
#include <linux/netdevice.h>
sysctl: don't use own implementation of hex_to_bin() Remove own implementation of hex_to_bin(). Signed-off-by: Andy Shevchenko <ext-andriy.shevchenko@nokia.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-05-25 05:33:26 +08:00
#include <linux/kernel.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
#include <linux/slab.h>
switch compat_sys_sysctl to COMPAT_SYSCALL_DEFINE Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-03-20 02:25:51 +08:00
#include <linux/compat.h>
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
#ifdef CONFIG_SYSCTL_SYSCALL
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
struct bin_table;
typedef ssize_t bin_convert_t(struct file *file,
void __user *oldval, size_t oldlen, void __user *newval, size_t newlen);
static bin_convert_t bin_dir;
static bin_convert_t bin_string;
static bin_convert_t bin_intvec;
static bin_convert_t bin_ulongvec;
static bin_convert_t bin_uuid;
static bin_convert_t bin_dn_node_address;
#define CTL_DIR bin_dir
#define CTL_STR bin_string
#define CTL_INT bin_intvec
#define CTL_ULONG bin_ulongvec
#define CTL_UUID bin_uuid
#define CTL_DNADR bin_dn_node_address
#define BUFSZ 256
struct bin_table {
bin_convert_t *convert;
int ctl_name;
const char *procname;
const struct bin_table *child;
};
static const struct bin_table bin_random_table[] = {
{ CTL_INT, RANDOM_POOLSIZE, "poolsize" },
{ CTL_INT, RANDOM_ENTROPY_COUNT, "entropy_avail" },
{ CTL_INT, RANDOM_READ_THRESH, "read_wakeup_threshold" },
{ CTL_INT, RANDOM_WRITE_THRESH, "write_wakeup_threshold" },
{ CTL_UUID, RANDOM_BOOT_ID, "boot_id" },
{ CTL_UUID, RANDOM_UUID, "uuid" },
{}
};
static const struct bin_table bin_pty_table[] = {
{ CTL_INT, PTY_MAX, "max" },
{ CTL_INT, PTY_NR, "nr" },
{}
};
static const struct bin_table bin_kern_table[] = {
{ CTL_STR, KERN_OSTYPE, "ostype" },
{ CTL_STR, KERN_OSRELEASE, "osrelease" },
/* KERN_OSREV not used */
{ CTL_STR, KERN_VERSION, "version" },
/* KERN_SECUREMASK not used */
/* KERN_PROF not used */
{ CTL_STR, KERN_NODENAME, "hostname" },
{ CTL_STR, KERN_DOMAINNAME, "domainname" },
{ CTL_INT, KERN_PANIC, "panic" },
{ CTL_INT, KERN_REALROOTDEV, "real-root-dev" },
{ CTL_STR, KERN_SPARC_REBOOT, "reboot-cmd" },
{ CTL_INT, KERN_CTLALTDEL, "ctrl-alt-del" },
{ CTL_INT, KERN_PRINTK, "printk" },
/* KERN_NAMETRANS not used */
/* KERN_PPC_HTABRECLAIM not used */
/* KERN_PPC_ZEROPAGED not used */
{ CTL_INT, KERN_PPC_POWERSAVE_NAP, "powersave-nap" },
{ CTL_STR, KERN_MODPROBE, "modprobe" },
{ CTL_INT, KERN_SG_BIG_BUFF, "sg-big-buff" },
{ CTL_INT, KERN_ACCT, "acct" },
/* KERN_PPC_L2CR "l2cr" no longer used */
/* KERN_RTSIGNR not used */
/* KERN_RTSIGMAX not used */
{ CTL_ULONG, KERN_SHMMAX, "shmmax" },
{ CTL_INT, KERN_MSGMAX, "msgmax" },
{ CTL_INT, KERN_MSGMNB, "msgmnb" },
/* KERN_MSGPOOL not used*/
{ CTL_INT, KERN_SYSRQ, "sysrq" },
{ CTL_INT, KERN_MAX_THREADS, "threads-max" },
{ CTL_DIR, KERN_RANDOM, "random", bin_random_table },
{ CTL_ULONG, KERN_SHMALL, "shmall" },
{ CTL_INT, KERN_MSGMNI, "msgmni" },
{ CTL_INT, KERN_SEM, "sem" },
{ CTL_INT, KERN_SPARC_STOP_A, "stop-a" },
{ CTL_INT, KERN_SHMMNI, "shmmni" },
{ CTL_INT, KERN_OVERFLOWUID, "overflowuid" },
{ CTL_INT, KERN_OVERFLOWGID, "overflowgid" },
{ CTL_STR, KERN_HOTPLUG, "hotplug", },
{ CTL_INT, KERN_IEEE_EMULATION_WARNINGS, "ieee_emulation_warnings" },
{ CTL_INT, KERN_S390_USER_DEBUG_LOGGING, "userprocess_debug" },
{ CTL_INT, KERN_CORE_USES_PID, "core_uses_pid" },
/* KERN_TAINTED "tainted" no longer used */
{ CTL_INT, KERN_CADPID, "cad_pid" },
{ CTL_INT, KERN_PIDMAX, "pid_max" },
{ CTL_STR, KERN_CORE_PATTERN, "core_pattern" },
{ CTL_INT, KERN_PANIC_ON_OOPS, "panic_on_oops" },
{ CTL_INT, KERN_HPPA_PWRSW, "soft-power" },
{ CTL_INT, KERN_HPPA_UNALIGNED, "unaligned-trap" },
{ CTL_INT, KERN_PRINTK_RATELIMIT, "printk_ratelimit" },
{ CTL_INT, KERN_PRINTK_RATELIMIT_BURST, "printk_ratelimit_burst" },
{ CTL_DIR, KERN_PTY, "pty", bin_pty_table },
{ CTL_INT, KERN_NGROUPS_MAX, "ngroups_max" },
{ CTL_INT, KERN_SPARC_SCONS_PWROFF, "scons-poweroff" },
/* KERN_HZ_TIMER "hz_timer" no longer used */
{ CTL_INT, KERN_UNKNOWN_NMI_PANIC, "unknown_nmi_panic" },
{ CTL_INT, KERN_BOOTLOADER_TYPE, "bootloader_type" },
{ CTL_INT, KERN_RANDOMIZE, "randomize_va_space" },
{ CTL_INT, KERN_SPIN_RETRY, "spin_retry" },
/* KERN_ACPI_VIDEO_FLAGS "acpi_video_flags" no longer used */
{ CTL_INT, KERN_IA64_UNALIGNED, "ignore-unaligned-usertrap" },
{ CTL_INT, KERN_COMPAT_LOG, "compat-log" },
{ CTL_INT, KERN_MAX_LOCK_DEPTH, "max_lock_depth" },
{ CTL_INT, KERN_PANIC_ON_NMI, "panic_on_unrecovered_nmi" },
kernel: add panic_on_warn There have been several times where I have had to rebuild a kernel to cause a panic when hitting a WARN() in the code in order to get a crash dump from a system. Sometimes this is easy to do, other times (such as in the case of a remote admin) it is not trivial to send new images to the user. A much easier method would be a switch to change the WARN() over to a panic. This makes debugging easier in that I can now test the actual image the WARN() was seen on and I do not have to engage in remote debugging. This patch adds a panic_on_warn kernel parameter and /proc/sys/kernel/panic_on_warn calls panic() in the warn_slowpath_common() path. The function will still print out the location of the warning. An example of the panic_on_warn output: The first line below is from the WARN_ON() to output the WARN_ON()'s location. After that the panic() output is displayed. WARNING: CPU: 30 PID: 11698 at /home/prarit/dummy_module/dummy-module.c:25 init_dummy+0x1f/0x30 [dummy_module]() Kernel panic - not syncing: panic_on_warn set ... CPU: 30 PID: 11698 Comm: insmod Tainted: G W OE 3.17.0+ #57 Hardware name: Intel Corporation S2600CP/S2600CP, BIOS RMLSDP.86I.00.29.D696.1311111329 11/11/2013 0000000000000000 000000008e3f87df ffff88080f093c38 ffffffff81665190 0000000000000000 ffffffff818aea3d ffff88080f093cb8 ffffffff8165e2ec ffffffff00000008 ffff88080f093cc8 ffff88080f093c68 000000008e3f87df Call Trace: [<ffffffff81665190>] dump_stack+0x46/0x58 [<ffffffff8165e2ec>] panic+0xd0/0x204 [<ffffffffa038e05f>] ? init_dummy+0x1f/0x30 [dummy_module] [<ffffffff81076b90>] warn_slowpath_common+0xd0/0xd0 [<ffffffffa038e040>] ? dummy_greetings+0x40/0x40 [dummy_module] [<ffffffff81076c8a>] warn_slowpath_null+0x1a/0x20 [<ffffffffa038e05f>] init_dummy+0x1f/0x30 [dummy_module] [<ffffffff81002144>] do_one_initcall+0xd4/0x210 [<ffffffff811b52c2>] ? __vunmap+0xc2/0x110 [<ffffffff810f8889>] load_module+0x16a9/0x1b30 [<ffffffff810f3d30>] ? store_uevent+0x70/0x70 [<ffffffff810f49b9>] ? copy_module_from_fd.isra.44+0x129/0x180 [<ffffffff810f8ec6>] SyS_finit_module+0xa6/0xd0 [<ffffffff8166cf29>] system_call_fastpath+0x12/0x17 Successfully tested by me. hpa said: There is another very valid use for this: many operators would rather a machine shuts down than being potentially compromised either functionally or security-wise. Signed-off-by: Prarit Bhargava <prarit@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Acked-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: Fabian Frederick <fabf@skynet.be> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-12-11 07:45:50 +08:00
{ CTL_INT, KERN_PANIC_ON_WARN, "panic_on_warn" },
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
{}
};
static const struct bin_table bin_vm_table[] = {
{ CTL_INT, VM_OVERCOMMIT_MEMORY, "overcommit_memory" },
{ CTL_INT, VM_PAGE_CLUSTER, "page-cluster" },
{ CTL_INT, VM_DIRTY_BACKGROUND, "dirty_background_ratio" },
{ CTL_INT, VM_DIRTY_RATIO, "dirty_ratio" },
/* VM_DIRTY_WB_CS "dirty_writeback_centisecs" no longer used */
/* VM_DIRTY_EXPIRE_CS "dirty_expire_centisecs" no longer used */
mm: prepare for removal of obsolete /proc/sys/vm/nr_pdflush_threads Since per-BDI flusher threads were introduced in 2.6, the pdflush mechanism is not used any more. But the old interface exported through /proc/sys/vm/nr_pdflush_threads still exists and is obviously useless. For back-compatibility, printk warning information and return 2 to notify the users that the interface is removed. Signed-off-by: Wanpeng Li <liwp@linux.vnet.ibm.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-08-01 07:41:52 +08:00
/* VM_NR_PDFLUSH_THREADS "nr_pdflush_threads" no longer used */
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
{ CTL_INT, VM_OVERCOMMIT_RATIO, "overcommit_ratio" },
/* VM_PAGEBUF unused */
/* VM_HUGETLB_PAGES "nr_hugepages" no longer used */
{ CTL_INT, VM_SWAPPINESS, "swappiness" },
{ CTL_INT, VM_LOWMEM_RESERVE_RATIO, "lowmem_reserve_ratio" },
{ CTL_INT, VM_MIN_FREE_KBYTES, "min_free_kbytes" },
{ CTL_INT, VM_MAX_MAP_COUNT, "max_map_count" },
{ CTL_INT, VM_LAPTOP_MODE, "laptop_mode" },
{ CTL_INT, VM_BLOCK_DUMP, "block_dump" },
{ CTL_INT, VM_HUGETLB_GROUP, "hugetlb_shm_group" },
{ CTL_INT, VM_VFS_CACHE_PRESSURE, "vfs_cache_pressure" },
{ CTL_INT, VM_LEGACY_VA_LAYOUT, "legacy_va_layout" },
/* VM_SWAP_TOKEN_TIMEOUT unused */
{ CTL_INT, VM_DROP_PAGECACHE, "drop_caches" },
{ CTL_INT, VM_PERCPU_PAGELIST_FRACTION, "percpu_pagelist_fraction" },
{ CTL_INT, VM_ZONE_RECLAIM_MODE, "zone_reclaim_mode" },
{ CTL_INT, VM_MIN_UNMAPPED, "min_unmapped_ratio" },
{ CTL_INT, VM_PANIC_ON_OOM, "panic_on_oom" },
{ CTL_INT, VM_VDSO_ENABLED, "vdso_enabled" },
{ CTL_INT, VM_MIN_SLAB, "min_slab_ratio" },
{}
};
static const struct bin_table bin_net_core_table[] = {
{ CTL_INT, NET_CORE_WMEM_MAX, "wmem_max" },
{ CTL_INT, NET_CORE_RMEM_MAX, "rmem_max" },
{ CTL_INT, NET_CORE_WMEM_DEFAULT, "wmem_default" },
{ CTL_INT, NET_CORE_RMEM_DEFAULT, "rmem_default" },
/* NET_CORE_DESTROY_DELAY unused */
{ CTL_INT, NET_CORE_MAX_BACKLOG, "netdev_max_backlog" },
/* NET_CORE_FASTROUTE unused */
{ CTL_INT, NET_CORE_MSG_COST, "message_cost" },
{ CTL_INT, NET_CORE_MSG_BURST, "message_burst" },
{ CTL_INT, NET_CORE_OPTMEM_MAX, "optmem_max" },
/* NET_CORE_HOT_LIST_LENGTH unused */
/* NET_CORE_DIVERT_VERSION unused */
/* NET_CORE_NO_CONG_THRESH unused */
/* NET_CORE_NO_CONG unused */
/* NET_CORE_LO_CONG unused */
/* NET_CORE_MOD_CONG unused */
{ CTL_INT, NET_CORE_DEV_WEIGHT, "dev_weight" },
{ CTL_INT, NET_CORE_SOMAXCONN, "somaxconn" },
{ CTL_INT, NET_CORE_BUDGET, "netdev_budget" },
{ CTL_INT, NET_CORE_AEVENT_ETIME, "xfrm_aevent_etime" },
{ CTL_INT, NET_CORE_AEVENT_RSEQTH, "xfrm_aevent_rseqth" },
{ CTL_INT, NET_CORE_WARNINGS, "warnings" },
{},
};
static const struct bin_table bin_net_unix_table[] = {
/* NET_UNIX_DESTROY_DELAY unused */
/* NET_UNIX_DELETE_DELAY unused */
{ CTL_INT, NET_UNIX_MAX_DGRAM_QLEN, "max_dgram_qlen" },
{}
};
static const struct bin_table bin_net_ipv4_route_table[] = {
{ CTL_INT, NET_IPV4_ROUTE_FLUSH, "flush" },
/* NET_IPV4_ROUTE_MIN_DELAY "min_delay" no longer used */
/* NET_IPV4_ROUTE_MAX_DELAY "max_delay" no longer used */
{ CTL_INT, NET_IPV4_ROUTE_GC_THRESH, "gc_thresh" },
{ CTL_INT, NET_IPV4_ROUTE_MAX_SIZE, "max_size" },
{ CTL_INT, NET_IPV4_ROUTE_GC_MIN_INTERVAL, "gc_min_interval" },
{ CTL_INT, NET_IPV4_ROUTE_GC_MIN_INTERVAL_MS, "gc_min_interval_ms" },
{ CTL_INT, NET_IPV4_ROUTE_GC_TIMEOUT, "gc_timeout" },
ipv4: NET_IPV4_ROUTE_GC_INTERVAL removal removing obsoleted sysctl, ip_rt_gc_interval variable no longer used since 2.6.38 Signed-off-by: Vasily Averin <vvs@sw.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-09-30 09:11:10 +08:00
/* NET_IPV4_ROUTE_GC_INTERVAL "gc_interval" no longer used */
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
{ CTL_INT, NET_IPV4_ROUTE_REDIRECT_LOAD, "redirect_load" },
{ CTL_INT, NET_IPV4_ROUTE_REDIRECT_NUMBER, "redirect_number" },
{ CTL_INT, NET_IPV4_ROUTE_REDIRECT_SILENCE, "redirect_silence" },
{ CTL_INT, NET_IPV4_ROUTE_ERROR_COST, "error_cost" },
{ CTL_INT, NET_IPV4_ROUTE_ERROR_BURST, "error_burst" },
{ CTL_INT, NET_IPV4_ROUTE_GC_ELASTICITY, "gc_elasticity" },
{ CTL_INT, NET_IPV4_ROUTE_MTU_EXPIRES, "mtu_expires" },
{ CTL_INT, NET_IPV4_ROUTE_MIN_PMTU, "min_pmtu" },
{ CTL_INT, NET_IPV4_ROUTE_MIN_ADVMSS, "min_adv_mss" },
{}
};
static const struct bin_table bin_net_ipv4_conf_vars_table[] = {
{ CTL_INT, NET_IPV4_CONF_FORWARDING, "forwarding" },
{ CTL_INT, NET_IPV4_CONF_MC_FORWARDING, "mc_forwarding" },
{ CTL_INT, NET_IPV4_CONF_ACCEPT_REDIRECTS, "accept_redirects" },
{ CTL_INT, NET_IPV4_CONF_SECURE_REDIRECTS, "secure_redirects" },
{ CTL_INT, NET_IPV4_CONF_SEND_REDIRECTS, "send_redirects" },
{ CTL_INT, NET_IPV4_CONF_SHARED_MEDIA, "shared_media" },
{ CTL_INT, NET_IPV4_CONF_RP_FILTER, "rp_filter" },
{ CTL_INT, NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE, "accept_source_route" },
{ CTL_INT, NET_IPV4_CONF_PROXY_ARP, "proxy_arp" },
{ CTL_INT, NET_IPV4_CONF_MEDIUM_ID, "medium_id" },
{ CTL_INT, NET_IPV4_CONF_BOOTP_RELAY, "bootp_relay" },
{ CTL_INT, NET_IPV4_CONF_LOG_MARTIANS, "log_martians" },
{ CTL_INT, NET_IPV4_CONF_TAG, "tag" },
{ CTL_INT, NET_IPV4_CONF_ARPFILTER, "arp_filter" },
{ CTL_INT, NET_IPV4_CONF_ARP_ANNOUNCE, "arp_announce" },
{ CTL_INT, NET_IPV4_CONF_ARP_IGNORE, "arp_ignore" },
{ CTL_INT, NET_IPV4_CONF_ARP_ACCEPT, "arp_accept" },
{ CTL_INT, NET_IPV4_CONF_ARP_NOTIFY, "arp_notify" },
{ CTL_INT, NET_IPV4_CONF_NOXFRM, "disable_xfrm" },
{ CTL_INT, NET_IPV4_CONF_NOPOLICY, "disable_policy" },
{ CTL_INT, NET_IPV4_CONF_FORCE_IGMP_VERSION, "force_igmp_version" },
{ CTL_INT, NET_IPV4_CONF_PROMOTE_SECONDARIES, "promote_secondaries" },
{}
};
static const struct bin_table bin_net_ipv4_conf_table[] = {
{ CTL_DIR, NET_PROTO_CONF_ALL, "all", bin_net_ipv4_conf_vars_table },
{ CTL_DIR, NET_PROTO_CONF_DEFAULT, "default", bin_net_ipv4_conf_vars_table },
{ CTL_DIR, 0, NULL, bin_net_ipv4_conf_vars_table },
{}
};
static const struct bin_table bin_net_neigh_vars_table[] = {
{ CTL_INT, NET_NEIGH_MCAST_SOLICIT, "mcast_solicit" },
{ CTL_INT, NET_NEIGH_UCAST_SOLICIT, "ucast_solicit" },
{ CTL_INT, NET_NEIGH_APP_SOLICIT, "app_solicit" },
/* NET_NEIGH_RETRANS_TIME "retrans_time" no longer used */
{ CTL_INT, NET_NEIGH_REACHABLE_TIME, "base_reachable_time" },
{ CTL_INT, NET_NEIGH_DELAY_PROBE_TIME, "delay_first_probe_time" },
{ CTL_INT, NET_NEIGH_GC_STALE_TIME, "gc_stale_time" },
{ CTL_INT, NET_NEIGH_UNRES_QLEN, "unres_qlen" },
{ CTL_INT, NET_NEIGH_PROXY_QLEN, "proxy_qlen" },
/* NET_NEIGH_ANYCAST_DELAY "anycast_delay" no longer used */
/* NET_NEIGH_PROXY_DELAY "proxy_delay" no longer used */
/* NET_NEIGH_LOCKTIME "locktime" no longer used */
{ CTL_INT, NET_NEIGH_GC_INTERVAL, "gc_interval" },
{ CTL_INT, NET_NEIGH_GC_THRESH1, "gc_thresh1" },
{ CTL_INT, NET_NEIGH_GC_THRESH2, "gc_thresh2" },
{ CTL_INT, NET_NEIGH_GC_THRESH3, "gc_thresh3" },
{ CTL_INT, NET_NEIGH_RETRANS_TIME_MS, "retrans_time_ms" },
{ CTL_INT, NET_NEIGH_REACHABLE_TIME_MS, "base_reachable_time_ms" },
{}
};
static const struct bin_table bin_net_neigh_table[] = {
{ CTL_DIR, NET_PROTO_CONF_DEFAULT, "default", bin_net_neigh_vars_table },
{ CTL_DIR, 0, NULL, bin_net_neigh_vars_table },
{}
};
static const struct bin_table bin_net_ipv4_netfilter_table[] = {
{ CTL_INT, NET_IPV4_NF_CONNTRACK_MAX, "ip_conntrack_max" },
/* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT "ip_conntrack_tcp_timeout_syn_sent" no longer used */
/* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV "ip_conntrack_tcp_timeout_syn_recv" no longer used */
/* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED "ip_conntrack_tcp_timeout_established" no longer used */
/* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT "ip_conntrack_tcp_timeout_fin_wait" no longer used */
/* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT "ip_conntrack_tcp_timeout_close_wait" no longer used */
/* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK "ip_conntrack_tcp_timeout_last_ack" no longer used */
/* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT "ip_conntrack_tcp_timeout_time_wait" no longer used */
/* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE "ip_conntrack_tcp_timeout_close" no longer used */
/* NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT "ip_conntrack_udp_timeout" no longer used */
/* NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM "ip_conntrack_udp_timeout_stream" no longer used */
/* NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT "ip_conntrack_icmp_timeout" no longer used */
/* NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT "ip_conntrack_generic_timeout" no longer used */
{ CTL_INT, NET_IPV4_NF_CONNTRACK_BUCKETS, "ip_conntrack_buckets" },
{ CTL_INT, NET_IPV4_NF_CONNTRACK_LOG_INVALID, "ip_conntrack_log_invalid" },
/* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS "ip_conntrack_tcp_timeout_max_retrans" no longer used */
{ CTL_INT, NET_IPV4_NF_CONNTRACK_TCP_LOOSE, "ip_conntrack_tcp_loose" },
{ CTL_INT, NET_IPV4_NF_CONNTRACK_TCP_BE_LIBERAL, "ip_conntrack_tcp_be_liberal" },
{ CTL_INT, NET_IPV4_NF_CONNTRACK_TCP_MAX_RETRANS, "ip_conntrack_tcp_max_retrans" },
/* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED "ip_conntrack_sctp_timeout_closed" no longer used */
/* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT "ip_conntrack_sctp_timeout_cookie_wait" no longer used */
/* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED "ip_conntrack_sctp_timeout_cookie_echoed" no longer used */
/* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED "ip_conntrack_sctp_timeout_established" no longer used */
/* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT "ip_conntrack_sctp_timeout_shutdown_sent" no longer used */
/* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD "ip_conntrack_sctp_timeout_shutdown_recd" no longer used */
/* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT "ip_conntrack_sctp_timeout_shutdown_ack_sent" no longer used */
{ CTL_INT, NET_IPV4_NF_CONNTRACK_COUNT, "ip_conntrack_count" },
{ CTL_INT, NET_IPV4_NF_CONNTRACK_CHECKSUM, "ip_conntrack_checksum" },
{}
};
static const struct bin_table bin_net_ipv4_table[] = {
{CTL_INT, NET_IPV4_FORWARD, "ip_forward" },
{ CTL_DIR, NET_IPV4_CONF, "conf", bin_net_ipv4_conf_table },
{ CTL_DIR, NET_IPV4_NEIGH, "neigh", bin_net_neigh_table },
{ CTL_DIR, NET_IPV4_ROUTE, "route", bin_net_ipv4_route_table },
/* NET_IPV4_FIB_HASH unused */
{ CTL_DIR, NET_IPV4_NETFILTER, "netfilter", bin_net_ipv4_netfilter_table },
{ CTL_INT, NET_IPV4_TCP_TIMESTAMPS, "tcp_timestamps" },
{ CTL_INT, NET_IPV4_TCP_WINDOW_SCALING, "tcp_window_scaling" },
{ CTL_INT, NET_IPV4_TCP_SACK, "tcp_sack" },
{ CTL_INT, NET_IPV4_TCP_RETRANS_COLLAPSE, "tcp_retrans_collapse" },
{ CTL_INT, NET_IPV4_DEFAULT_TTL, "ip_default_ttl" },
/* NET_IPV4_AUTOCONFIG unused */
{ CTL_INT, NET_IPV4_NO_PMTU_DISC, "ip_no_pmtu_disc" },
{ CTL_INT, NET_IPV4_NONLOCAL_BIND, "ip_nonlocal_bind" },
{ CTL_INT, NET_IPV4_TCP_SYN_RETRIES, "tcp_syn_retries" },
{ CTL_INT, NET_TCP_SYNACK_RETRIES, "tcp_synack_retries" },
{ CTL_INT, NET_TCP_MAX_ORPHANS, "tcp_max_orphans" },
{ CTL_INT, NET_TCP_MAX_TW_BUCKETS, "tcp_max_tw_buckets" },
{ CTL_INT, NET_IPV4_DYNADDR, "ip_dynaddr" },
{ CTL_INT, NET_IPV4_TCP_KEEPALIVE_TIME, "tcp_keepalive_time" },
{ CTL_INT, NET_IPV4_TCP_KEEPALIVE_PROBES, "tcp_keepalive_probes" },
{ CTL_INT, NET_IPV4_TCP_KEEPALIVE_INTVL, "tcp_keepalive_intvl" },
{ CTL_INT, NET_IPV4_TCP_RETRIES1, "tcp_retries1" },
{ CTL_INT, NET_IPV4_TCP_RETRIES2, "tcp_retries2" },
{ CTL_INT, NET_IPV4_TCP_FIN_TIMEOUT, "tcp_fin_timeout" },
{ CTL_INT, NET_TCP_SYNCOOKIES, "tcp_syncookies" },
{ CTL_INT, NET_TCP_TW_RECYCLE, "tcp_tw_recycle" },
{ CTL_INT, NET_TCP_ABORT_ON_OVERFLOW, "tcp_abort_on_overflow" },
{ CTL_INT, NET_TCP_STDURG, "tcp_stdurg" },
{ CTL_INT, NET_TCP_RFC1337, "tcp_rfc1337" },
{ CTL_INT, NET_TCP_MAX_SYN_BACKLOG, "tcp_max_syn_backlog" },
{ CTL_INT, NET_IPV4_LOCAL_PORT_RANGE, "ip_local_port_range" },
{ CTL_INT, NET_IPV4_IGMP_MAX_MEMBERSHIPS, "igmp_max_memberships" },
{ CTL_INT, NET_IPV4_IGMP_MAX_MSF, "igmp_max_msf" },
{ CTL_INT, NET_IPV4_INET_PEER_THRESHOLD, "inet_peer_threshold" },
{ CTL_INT, NET_IPV4_INET_PEER_MINTTL, "inet_peer_minttl" },
{ CTL_INT, NET_IPV4_INET_PEER_MAXTTL, "inet_peer_maxttl" },
{ CTL_INT, NET_IPV4_INET_PEER_GC_MINTIME, "inet_peer_gc_mintime" },
{ CTL_INT, NET_IPV4_INET_PEER_GC_MAXTIME, "inet_peer_gc_maxtime" },
{ CTL_INT, NET_TCP_ORPHAN_RETRIES, "tcp_orphan_retries" },
{ CTL_INT, NET_TCP_FACK, "tcp_fack" },
{ CTL_INT, NET_TCP_REORDERING, "tcp_reordering" },
{ CTL_INT, NET_TCP_ECN, "tcp_ecn" },
{ CTL_INT, NET_TCP_DSACK, "tcp_dsack" },
{ CTL_INT, NET_TCP_MEM, "tcp_mem" },
{ CTL_INT, NET_TCP_WMEM, "tcp_wmem" },
{ CTL_INT, NET_TCP_RMEM, "tcp_rmem" },
{ CTL_INT, NET_TCP_APP_WIN, "tcp_app_win" },
{ CTL_INT, NET_TCP_ADV_WIN_SCALE, "tcp_adv_win_scale" },
{ CTL_INT, NET_TCP_TW_REUSE, "tcp_tw_reuse" },
{ CTL_INT, NET_TCP_FRTO, "tcp_frto" },
{ CTL_INT, NET_TCP_FRTO_RESPONSE, "tcp_frto_response" },
{ CTL_INT, NET_TCP_LOW_LATENCY, "tcp_low_latency" },
{ CTL_INT, NET_TCP_NO_METRICS_SAVE, "tcp_no_metrics_save" },
{ CTL_INT, NET_TCP_MODERATE_RCVBUF, "tcp_moderate_rcvbuf" },
{ CTL_INT, NET_TCP_TSO_WIN_DIVISOR, "tcp_tso_win_divisor" },
{ CTL_STR, NET_TCP_CONG_CONTROL, "tcp_congestion_control" },
{ CTL_INT, NET_TCP_MTU_PROBING, "tcp_mtu_probing" },
{ CTL_INT, NET_TCP_BASE_MSS, "tcp_base_mss" },
{ CTL_INT, NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS, "tcp_workaround_signed_windows" },
{ CTL_INT, NET_TCP_SLOW_START_AFTER_IDLE, "tcp_slow_start_after_idle" },
{ CTL_INT, NET_CIPSOV4_CACHE_ENABLE, "cipso_cache_enable" },
{ CTL_INT, NET_CIPSOV4_CACHE_BUCKET_SIZE, "cipso_cache_bucket_size" },
{ CTL_INT, NET_CIPSOV4_RBM_OPTFMT, "cipso_rbm_optfmt" },
{ CTL_INT, NET_CIPSOV4_RBM_STRICTVALID, "cipso_rbm_strictvalid" },
/* NET_TCP_AVAIL_CONG_CONTROL "tcp_available_congestion_control" no longer used */
{ CTL_STR, NET_TCP_ALLOWED_CONG_CONTROL, "tcp_allowed_congestion_control" },
{ CTL_INT, NET_TCP_MAX_SSTHRESH, "tcp_max_ssthresh" },
{ CTL_INT, NET_IPV4_ICMP_ECHO_IGNORE_ALL, "icmp_echo_ignore_all" },
{ CTL_INT, NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS, "icmp_echo_ignore_broadcasts" },
{ CTL_INT, NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES, "icmp_ignore_bogus_error_responses" },
{ CTL_INT, NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR, "icmp_errors_use_inbound_ifaddr" },
{ CTL_INT, NET_IPV4_ICMP_RATELIMIT, "icmp_ratelimit" },
{ CTL_INT, NET_IPV4_ICMP_RATEMASK, "icmp_ratemask" },
{ CTL_INT, NET_IPV4_IPFRAG_HIGH_THRESH, "ipfrag_high_thresh" },
{ CTL_INT, NET_IPV4_IPFRAG_LOW_THRESH, "ipfrag_low_thresh" },
{ CTL_INT, NET_IPV4_IPFRAG_TIME, "ipfrag_time" },
{ CTL_INT, NET_IPV4_IPFRAG_SECRET_INTERVAL, "ipfrag_secret_interval" },
/* NET_IPV4_IPFRAG_MAX_DIST "ipfrag_max_dist" no longer used */
{ CTL_INT, 2088 /* NET_IPQ_QMAX */, "ip_queue_maxlen" },
/* NET_TCP_DEFAULT_WIN_SCALE unused */
/* NET_TCP_BIC_BETA unused */
/* NET_IPV4_TCP_MAX_KA_PROBES unused */
/* NET_IPV4_IP_MASQ_DEBUG unused */
/* NET_TCP_SYN_TAILDROP unused */
/* NET_IPV4_ICMP_SOURCEQUENCH_RATE unused */
/* NET_IPV4_ICMP_DESTUNREACH_RATE unused */
/* NET_IPV4_ICMP_TIMEEXCEED_RATE unused */
/* NET_IPV4_ICMP_PARAMPROB_RATE unused */
/* NET_IPV4_ICMP_ECHOREPLY_RATE unused */
/* NET_IPV4_ALWAYS_DEFRAG unused */
{}
};
static const struct bin_table bin_net_ipx_table[] = {
{ CTL_INT, NET_IPX_PPROP_BROADCASTING, "ipx_pprop_broadcasting" },
/* NET_IPX_FORWARDING unused */
{}
};
static const struct bin_table bin_net_atalk_table[] = {
{ CTL_INT, NET_ATALK_AARP_EXPIRY_TIME, "aarp-expiry-time" },
{ CTL_INT, NET_ATALK_AARP_TICK_TIME, "aarp-tick-time" },
{ CTL_INT, NET_ATALK_AARP_RETRANSMIT_LIMIT, "aarp-retransmit-limit" },
{ CTL_INT, NET_ATALK_AARP_RESOLVE_TIME, "aarp-resolve-time" },
{},
};
static const struct bin_table bin_net_netrom_table[] = {
{ CTL_INT, NET_NETROM_DEFAULT_PATH_QUALITY, "default_path_quality" },
{ CTL_INT, NET_NETROM_OBSOLESCENCE_COUNT_INITIALISER, "obsolescence_count_initialiser" },
{ CTL_INT, NET_NETROM_NETWORK_TTL_INITIALISER, "network_ttl_initialiser" },
{ CTL_INT, NET_NETROM_TRANSPORT_TIMEOUT, "transport_timeout" },
{ CTL_INT, NET_NETROM_TRANSPORT_MAXIMUM_TRIES, "transport_maximum_tries" },
{ CTL_INT, NET_NETROM_TRANSPORT_ACKNOWLEDGE_DELAY, "transport_acknowledge_delay" },
{ CTL_INT, NET_NETROM_TRANSPORT_BUSY_DELAY, "transport_busy_delay" },
{ CTL_INT, NET_NETROM_TRANSPORT_REQUESTED_WINDOW_SIZE, "transport_requested_window_size" },
{ CTL_INT, NET_NETROM_TRANSPORT_NO_ACTIVITY_TIMEOUT, "transport_no_activity_timeout" },
{ CTL_INT, NET_NETROM_ROUTING_CONTROL, "routing_control" },
{ CTL_INT, NET_NETROM_LINK_FAILS_COUNT, "link_fails_count" },
{ CTL_INT, NET_NETROM_RESET, "reset" },
{}
};
static const struct bin_table bin_net_ax25_param_table[] = {
{ CTL_INT, NET_AX25_IP_DEFAULT_MODE, "ip_default_mode" },
{ CTL_INT, NET_AX25_DEFAULT_MODE, "ax25_default_mode" },
{ CTL_INT, NET_AX25_BACKOFF_TYPE, "backoff_type" },
{ CTL_INT, NET_AX25_CONNECT_MODE, "connect_mode" },
{ CTL_INT, NET_AX25_STANDARD_WINDOW, "standard_window_size" },
{ CTL_INT, NET_AX25_EXTENDED_WINDOW, "extended_window_size" },
{ CTL_INT, NET_AX25_T1_TIMEOUT, "t1_timeout" },
{ CTL_INT, NET_AX25_T2_TIMEOUT, "t2_timeout" },
{ CTL_INT, NET_AX25_T3_TIMEOUT, "t3_timeout" },
{ CTL_INT, NET_AX25_IDLE_TIMEOUT, "idle_timeout" },
{ CTL_INT, NET_AX25_N2, "maximum_retry_count" },
{ CTL_INT, NET_AX25_PACLEN, "maximum_packet_length" },
{ CTL_INT, NET_AX25_PROTOCOL, "protocol" },
{ CTL_INT, NET_AX25_DAMA_SLAVE_TIMEOUT, "dama_slave_timeout" },
{}
};
static const struct bin_table bin_net_ax25_table[] = {
{ CTL_DIR, 0, NULL, bin_net_ax25_param_table },
{}
};
static const struct bin_table bin_net_rose_table[] = {
{ CTL_INT, NET_ROSE_RESTART_REQUEST_TIMEOUT, "restart_request_timeout" },
{ CTL_INT, NET_ROSE_CALL_REQUEST_TIMEOUT, "call_request_timeout" },
{ CTL_INT, NET_ROSE_RESET_REQUEST_TIMEOUT, "reset_request_timeout" },
{ CTL_INT, NET_ROSE_CLEAR_REQUEST_TIMEOUT, "clear_request_timeout" },
{ CTL_INT, NET_ROSE_ACK_HOLD_BACK_TIMEOUT, "acknowledge_hold_back_timeout" },
{ CTL_INT, NET_ROSE_ROUTING_CONTROL, "routing_control" },
{ CTL_INT, NET_ROSE_LINK_FAIL_TIMEOUT, "link_fail_timeout" },
{ CTL_INT, NET_ROSE_MAX_VCS, "maximum_virtual_circuits" },
{ CTL_INT, NET_ROSE_WINDOW_SIZE, "window_size" },
{ CTL_INT, NET_ROSE_NO_ACTIVITY_TIMEOUT, "no_activity_timeout" },
{}
};
static const struct bin_table bin_net_ipv6_conf_var_table[] = {
{ CTL_INT, NET_IPV6_FORWARDING, "forwarding" },
{ CTL_INT, NET_IPV6_HOP_LIMIT, "hop_limit" },
{ CTL_INT, NET_IPV6_MTU, "mtu" },
{ CTL_INT, NET_IPV6_ACCEPT_RA, "accept_ra" },
{ CTL_INT, NET_IPV6_ACCEPT_REDIRECTS, "accept_redirects" },
{ CTL_INT, NET_IPV6_AUTOCONF, "autoconf" },
{ CTL_INT, NET_IPV6_DAD_TRANSMITS, "dad_transmits" },
{ CTL_INT, NET_IPV6_RTR_SOLICITS, "router_solicitations" },
{ CTL_INT, NET_IPV6_RTR_SOLICIT_INTERVAL, "router_solicitation_interval" },
{ CTL_INT, NET_IPV6_RTR_SOLICIT_DELAY, "router_solicitation_delay" },
{ CTL_INT, NET_IPV6_USE_TEMPADDR, "use_tempaddr" },
{ CTL_INT, NET_IPV6_TEMP_VALID_LFT, "temp_valid_lft" },
{ CTL_INT, NET_IPV6_TEMP_PREFERED_LFT, "temp_prefered_lft" },
{ CTL_INT, NET_IPV6_REGEN_MAX_RETRY, "regen_max_retry" },
{ CTL_INT, NET_IPV6_MAX_DESYNC_FACTOR, "max_desync_factor" },
{ CTL_INT, NET_IPV6_MAX_ADDRESSES, "max_addresses" },
{ CTL_INT, NET_IPV6_FORCE_MLD_VERSION, "force_mld_version" },
{ CTL_INT, NET_IPV6_ACCEPT_RA_DEFRTR, "accept_ra_defrtr" },
{ CTL_INT, NET_IPV6_ACCEPT_RA_PINFO, "accept_ra_pinfo" },
{ CTL_INT, NET_IPV6_ACCEPT_RA_RTR_PREF, "accept_ra_rtr_pref" },
{ CTL_INT, NET_IPV6_RTR_PROBE_INTERVAL, "router_probe_interval" },
{ CTL_INT, NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN, "accept_ra_rt_info_max_plen" },
{ CTL_INT, NET_IPV6_PROXY_NDP, "proxy_ndp" },
{ CTL_INT, NET_IPV6_ACCEPT_SOURCE_ROUTE, "accept_source_route" },
ipv6: Allow accepting RA from local IP addresses. This can be used in virtual networking applications, and may have other uses as well. The option is disabled by default. A specific use case is setting up virtual routers, bridges, and hosts on a single OS without the use of network namespaces or virtual machines. With proper use of ip rules, routing tables, veth interface pairs and/or other virtual interfaces, and applications that can bind to interfaces and/or IP addresses, it is possibly to create one or more virtual routers with multiple hosts attached. The host interfaces can act as IPv6 systems, with radvd running on the ports in the virtual routers. With the option provided in this patch enabled, those hosts can now properly obtain IPv6 addresses from the radvd. Signed-off-by: Ben Greear <greearb@candelatech.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-26 05:44:53 +08:00
{ CTL_INT, NET_IPV6_ACCEPT_RA_FROM_LOCAL, "accept_ra_from_local" },
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
{}
};
static const struct bin_table bin_net_ipv6_conf_table[] = {
{ CTL_DIR, NET_PROTO_CONF_ALL, "all", bin_net_ipv6_conf_var_table },
{ CTL_DIR, NET_PROTO_CONF_DEFAULT, "default", bin_net_ipv6_conf_var_table },
{ CTL_DIR, 0, NULL, bin_net_ipv6_conf_var_table },
{}
};
static const struct bin_table bin_net_ipv6_route_table[] = {
/* NET_IPV6_ROUTE_FLUSH "flush" no longer used */
{ CTL_INT, NET_IPV6_ROUTE_GC_THRESH, "gc_thresh" },
{ CTL_INT, NET_IPV6_ROUTE_MAX_SIZE, "max_size" },
{ CTL_INT, NET_IPV6_ROUTE_GC_MIN_INTERVAL, "gc_min_interval" },
{ CTL_INT, NET_IPV6_ROUTE_GC_TIMEOUT, "gc_timeout" },
{ CTL_INT, NET_IPV6_ROUTE_GC_INTERVAL, "gc_interval" },
{ CTL_INT, NET_IPV6_ROUTE_GC_ELASTICITY, "gc_elasticity" },
{ CTL_INT, NET_IPV6_ROUTE_MTU_EXPIRES, "mtu_expires" },
{ CTL_INT, NET_IPV6_ROUTE_MIN_ADVMSS, "min_adv_mss" },
{ CTL_INT, NET_IPV6_ROUTE_GC_MIN_INTERVAL_MS, "gc_min_interval_ms" },
{}
};
static const struct bin_table bin_net_ipv6_icmp_table[] = {
{ CTL_INT, NET_IPV6_ICMP_RATELIMIT, "ratelimit" },
{}
};
static const struct bin_table bin_net_ipv6_table[] = {
{ CTL_DIR, NET_IPV6_CONF, "conf", bin_net_ipv6_conf_table },
{ CTL_DIR, NET_IPV6_NEIGH, "neigh", bin_net_neigh_table },
{ CTL_DIR, NET_IPV6_ROUTE, "route", bin_net_ipv6_route_table },
{ CTL_DIR, NET_IPV6_ICMP, "icmp", bin_net_ipv6_icmp_table },
{ CTL_INT, NET_IPV6_BINDV6ONLY, "bindv6only" },
{ CTL_INT, NET_IPV6_IP6FRAG_HIGH_THRESH, "ip6frag_high_thresh" },
{ CTL_INT, NET_IPV6_IP6FRAG_LOW_THRESH, "ip6frag_low_thresh" },
{ CTL_INT, NET_IPV6_IP6FRAG_TIME, "ip6frag_time" },
{ CTL_INT, NET_IPV6_IP6FRAG_SECRET_INTERVAL, "ip6frag_secret_interval" },
{ CTL_INT, NET_IPV6_MLD_MAX_MSF, "mld_max_msf" },
{ CTL_INT, 2088 /* IPQ_QMAX */, "ip6_queue_maxlen" },
{}
};
static const struct bin_table bin_net_x25_table[] = {
{ CTL_INT, NET_X25_RESTART_REQUEST_TIMEOUT, "restart_request_timeout" },
{ CTL_INT, NET_X25_CALL_REQUEST_TIMEOUT, "call_request_timeout" },
{ CTL_INT, NET_X25_RESET_REQUEST_TIMEOUT, "reset_request_timeout" },
{ CTL_INT, NET_X25_CLEAR_REQUEST_TIMEOUT, "clear_request_timeout" },
{ CTL_INT, NET_X25_ACK_HOLD_BACK_TIMEOUT, "acknowledgement_hold_back_timeout" },
{ CTL_INT, NET_X25_FORWARD, "x25_forward" },
{}
};
static const struct bin_table bin_net_tr_table[] = {
{ CTL_INT, NET_TR_RIF_TIMEOUT, "rif_timeout" },
{}
};
static const struct bin_table bin_net_decnet_conf_vars[] = {
{ CTL_INT, NET_DECNET_CONF_DEV_FORWARDING, "forwarding" },
{ CTL_INT, NET_DECNET_CONF_DEV_PRIORITY, "priority" },
{ CTL_INT, NET_DECNET_CONF_DEV_T2, "t2" },
{ CTL_INT, NET_DECNET_CONF_DEV_T3, "t3" },
{}
};
static const struct bin_table bin_net_decnet_conf[] = {
{ CTL_DIR, NET_DECNET_CONF_ETHER, "ethernet", bin_net_decnet_conf_vars },
{ CTL_DIR, NET_DECNET_CONF_GRE, "ipgre", bin_net_decnet_conf_vars },
{ CTL_DIR, NET_DECNET_CONF_X25, "x25", bin_net_decnet_conf_vars },
{ CTL_DIR, NET_DECNET_CONF_PPP, "ppp", bin_net_decnet_conf_vars },
{ CTL_DIR, NET_DECNET_CONF_DDCMP, "ddcmp", bin_net_decnet_conf_vars },
{ CTL_DIR, NET_DECNET_CONF_LOOPBACK, "loopback", bin_net_decnet_conf_vars },
{ CTL_DIR, 0, NULL, bin_net_decnet_conf_vars },
{}
};
static const struct bin_table bin_net_decnet_table[] = {
{ CTL_DIR, NET_DECNET_CONF, "conf", bin_net_decnet_conf },
{ CTL_DNADR, NET_DECNET_NODE_ADDRESS, "node_address" },
{ CTL_STR, NET_DECNET_NODE_NAME, "node_name" },
{ CTL_STR, NET_DECNET_DEFAULT_DEVICE, "default_device" },
{ CTL_INT, NET_DECNET_TIME_WAIT, "time_wait" },
{ CTL_INT, NET_DECNET_DN_COUNT, "dn_count" },
{ CTL_INT, NET_DECNET_DI_COUNT, "di_count" },
{ CTL_INT, NET_DECNET_DR_COUNT, "dr_count" },
{ CTL_INT, NET_DECNET_DST_GC_INTERVAL, "dst_gc_interval" },
{ CTL_INT, NET_DECNET_NO_FC_MAX_CWND, "no_fc_max_cwnd" },
{ CTL_INT, NET_DECNET_MEM, "decnet_mem" },
{ CTL_INT, NET_DECNET_RMEM, "decnet_rmem" },
{ CTL_INT, NET_DECNET_WMEM, "decnet_wmem" },
{ CTL_INT, NET_DECNET_DEBUG_LEVEL, "debug" },
{}
};
static const struct bin_table bin_net_sctp_table[] = {
{ CTL_INT, NET_SCTP_RTO_INITIAL, "rto_initial" },
{ CTL_INT, NET_SCTP_RTO_MIN, "rto_min" },
{ CTL_INT, NET_SCTP_RTO_MAX, "rto_max" },
{ CTL_INT, NET_SCTP_RTO_ALPHA, "rto_alpha_exp_divisor" },
{ CTL_INT, NET_SCTP_RTO_BETA, "rto_beta_exp_divisor" },
{ CTL_INT, NET_SCTP_VALID_COOKIE_LIFE, "valid_cookie_life" },
{ CTL_INT, NET_SCTP_ASSOCIATION_MAX_RETRANS, "association_max_retrans" },
{ CTL_INT, NET_SCTP_PATH_MAX_RETRANS, "path_max_retrans" },
{ CTL_INT, NET_SCTP_MAX_INIT_RETRANSMITS, "max_init_retransmits" },
{ CTL_INT, NET_SCTP_HB_INTERVAL, "hb_interval" },
{ CTL_INT, NET_SCTP_PRESERVE_ENABLE, "cookie_preserve_enable" },
{ CTL_INT, NET_SCTP_MAX_BURST, "max_burst" },
{ CTL_INT, NET_SCTP_ADDIP_ENABLE, "addip_enable" },
{ CTL_INT, NET_SCTP_PRSCTP_ENABLE, "prsctp_enable" },
{ CTL_INT, NET_SCTP_SNDBUF_POLICY, "sndbuf_policy" },
{ CTL_INT, NET_SCTP_SACK_TIMEOUT, "sack_timeout" },
{ CTL_INT, NET_SCTP_RCVBUF_POLICY, "rcvbuf_policy" },
{}
};
static const struct bin_table bin_net_llc_llc2_timeout_table[] = {
{ CTL_INT, NET_LLC2_ACK_TIMEOUT, "ack" },
{ CTL_INT, NET_LLC2_P_TIMEOUT, "p" },
{ CTL_INT, NET_LLC2_REJ_TIMEOUT, "rej" },
{ CTL_INT, NET_LLC2_BUSY_TIMEOUT, "busy" },
{}
};
static const struct bin_table bin_net_llc_station_table[] = {
{ CTL_INT, NET_LLC_STATION_ACK_TIMEOUT, "ack_timeout" },
{}
};
static const struct bin_table bin_net_llc_llc2_table[] = {
{ CTL_DIR, NET_LLC2, "timeout", bin_net_llc_llc2_timeout_table },
{}
};
static const struct bin_table bin_net_llc_table[] = {
{ CTL_DIR, NET_LLC2, "llc2", bin_net_llc_llc2_table },
{ CTL_DIR, NET_LLC_STATION, "station", bin_net_llc_station_table },
{}
};
static const struct bin_table bin_net_netfilter_table[] = {
{ CTL_INT, NET_NF_CONNTRACK_MAX, "nf_conntrack_max" },
/* NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT "nf_conntrack_tcp_timeout_syn_sent" no longer used */
/* NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV "nf_conntrack_tcp_timeout_syn_recv" no longer used */
/* NET_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED "nf_conntrack_tcp_timeout_established" no longer used */
/* NET_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT "nf_conntrack_tcp_timeout_fin_wait" no longer used */
/* NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT "nf_conntrack_tcp_timeout_close_wait" no longer used */
/* NET_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK "nf_conntrack_tcp_timeout_last_ack" no longer used */
/* NET_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT "nf_conntrack_tcp_timeout_time_wait" no longer used */
/* NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE "nf_conntrack_tcp_timeout_close" no longer used */
/* NET_NF_CONNTRACK_UDP_TIMEOUT "nf_conntrack_udp_timeout" no longer used */
/* NET_NF_CONNTRACK_UDP_TIMEOUT_STREAM "nf_conntrack_udp_timeout_stream" no longer used */
/* NET_NF_CONNTRACK_ICMP_TIMEOUT "nf_conntrack_icmp_timeout" no longer used */
/* NET_NF_CONNTRACK_GENERIC_TIMEOUT "nf_conntrack_generic_timeout" no longer used */
{ CTL_INT, NET_NF_CONNTRACK_BUCKETS, "nf_conntrack_buckets" },
{ CTL_INT, NET_NF_CONNTRACK_LOG_INVALID, "nf_conntrack_log_invalid" },
/* NET_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS "nf_conntrack_tcp_timeout_max_retrans" no longer used */
{ CTL_INT, NET_NF_CONNTRACK_TCP_LOOSE, "nf_conntrack_tcp_loose" },
{ CTL_INT, NET_NF_CONNTRACK_TCP_BE_LIBERAL, "nf_conntrack_tcp_be_liberal" },
{ CTL_INT, NET_NF_CONNTRACK_TCP_MAX_RETRANS, "nf_conntrack_tcp_max_retrans" },
/* NET_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED "nf_conntrack_sctp_timeout_closed" no longer used */
/* NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT "nf_conntrack_sctp_timeout_cookie_wait" no longer used */
/* NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED "nf_conntrack_sctp_timeout_cookie_echoed" no longer used */
/* NET_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED "nf_conntrack_sctp_timeout_established" no longer used */
/* NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT "nf_conntrack_sctp_timeout_shutdown_sent" no longer used */
/* NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD "nf_conntrack_sctp_timeout_shutdown_recd" no longer used */
/* NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT "nf_conntrack_sctp_timeout_shutdown_ack_sent" no longer used */
{ CTL_INT, NET_NF_CONNTRACK_COUNT, "nf_conntrack_count" },
/* NET_NF_CONNTRACK_ICMPV6_TIMEOUT "nf_conntrack_icmpv6_timeout" no longer used */
/* NET_NF_CONNTRACK_FRAG6_TIMEOUT "nf_conntrack_frag6_timeout" no longer used */
{ CTL_INT, NET_NF_CONNTRACK_FRAG6_LOW_THRESH, "nf_conntrack_frag6_low_thresh" },
{ CTL_INT, NET_NF_CONNTRACK_FRAG6_HIGH_THRESH, "nf_conntrack_frag6_high_thresh" },
{ CTL_INT, NET_NF_CONNTRACK_CHECKSUM, "nf_conntrack_checksum" },
{}
};
static const struct bin_table bin_net_irda_table[] = {
{ CTL_INT, NET_IRDA_DISCOVERY, "discovery" },
{ CTL_STR, NET_IRDA_DEVNAME, "devname" },
{ CTL_INT, NET_IRDA_DEBUG, "debug" },
{ CTL_INT, NET_IRDA_FAST_POLL, "fast_poll_increase" },
{ CTL_INT, NET_IRDA_DISCOVERY_SLOTS, "discovery_slots" },
{ CTL_INT, NET_IRDA_DISCOVERY_TIMEOUT, "discovery_timeout" },
{ CTL_INT, NET_IRDA_SLOT_TIMEOUT, "slot_timeout" },
{ CTL_INT, NET_IRDA_MAX_BAUD_RATE, "max_baud_rate" },
{ CTL_INT, NET_IRDA_MIN_TX_TURN_TIME, "min_tx_turn_time" },
{ CTL_INT, NET_IRDA_MAX_TX_DATA_SIZE, "max_tx_data_size" },
{ CTL_INT, NET_IRDA_MAX_TX_WINDOW, "max_tx_window" },
{ CTL_INT, NET_IRDA_MAX_NOREPLY_TIME, "max_noreply_time" },
{ CTL_INT, NET_IRDA_WARN_NOREPLY_TIME, "warn_noreply_time" },
{ CTL_INT, NET_IRDA_LAP_KEEPALIVE_TIME, "lap_keepalive_time" },
{}
};
static const struct bin_table bin_net_table[] = {
{ CTL_DIR, NET_CORE, "core", bin_net_core_table },
/* NET_ETHER not used */
/* NET_802 not used */
{ CTL_DIR, NET_UNIX, "unix", bin_net_unix_table },
{ CTL_DIR, NET_IPV4, "ipv4", bin_net_ipv4_table },
{ CTL_DIR, NET_IPX, "ipx", bin_net_ipx_table },
{ CTL_DIR, NET_ATALK, "appletalk", bin_net_atalk_table },
{ CTL_DIR, NET_NETROM, "netrom", bin_net_netrom_table },
{ CTL_DIR, NET_AX25, "ax25", bin_net_ax25_table },
/* NET_BRIDGE "bridge" no longer used */
{ CTL_DIR, NET_ROSE, "rose", bin_net_rose_table },
{ CTL_DIR, NET_IPV6, "ipv6", bin_net_ipv6_table },
{ CTL_DIR, NET_X25, "x25", bin_net_x25_table },
{ CTL_DIR, NET_TR, "token-ring", bin_net_tr_table },
{ CTL_DIR, NET_DECNET, "decnet", bin_net_decnet_table },
/* NET_ECONET not used */
{ CTL_DIR, NET_SCTP, "sctp", bin_net_sctp_table },
{ CTL_DIR, NET_LLC, "llc", bin_net_llc_table },
{ CTL_DIR, NET_NETFILTER, "netfilter", bin_net_netfilter_table },
/* NET_DCCP "dccp" no longer used */
{ CTL_DIR, NET_IRDA, "irda", bin_net_irda_table },
{ CTL_INT, 2089, "nf_conntrack_max" },
{}
};
static const struct bin_table bin_fs_quota_table[] = {
{ CTL_INT, FS_DQ_LOOKUPS, "lookups" },
{ CTL_INT, FS_DQ_DROPS, "drops" },
{ CTL_INT, FS_DQ_READS, "reads" },
{ CTL_INT, FS_DQ_WRITES, "writes" },
{ CTL_INT, FS_DQ_CACHE_HITS, "cache_hits" },
{ CTL_INT, FS_DQ_ALLOCATED, "allocated_dquots" },
{ CTL_INT, FS_DQ_FREE, "free_dquots" },
{ CTL_INT, FS_DQ_SYNCS, "syncs" },
{ CTL_INT, FS_DQ_WARNINGS, "warnings" },
{}
};
static const struct bin_table bin_fs_xfs_table[] = {
{ CTL_INT, XFS_SGID_INHERIT, "irix_sgid_inherit" },
{ CTL_INT, XFS_SYMLINK_MODE, "irix_symlink_mode" },
{ CTL_INT, XFS_PANIC_MASK, "panic_mask" },
{ CTL_INT, XFS_ERRLEVEL, "error_level" },
{ CTL_INT, XFS_SYNCD_TIMER, "xfssyncd_centisecs" },
{ CTL_INT, XFS_INHERIT_SYNC, "inherit_sync" },
{ CTL_INT, XFS_INHERIT_NODUMP, "inherit_nodump" },
{ CTL_INT, XFS_INHERIT_NOATIME, "inherit_noatime" },
{ CTL_INT, XFS_BUF_TIMER, "xfsbufd_centisecs" },
{ CTL_INT, XFS_BUF_AGE, "age_buffer_centisecs" },
{ CTL_INT, XFS_INHERIT_NOSYM, "inherit_nosymlinks" },
{ CTL_INT, XFS_ROTORSTEP, "rotorstep" },
{ CTL_INT, XFS_INHERIT_NODFRG, "inherit_nodefrag" },
{ CTL_INT, XFS_FILESTREAM_TIMER, "filestream_centisecs" },
{ CTL_INT, XFS_STATS_CLEAR, "stats_clear" },
{}
};
static const struct bin_table bin_fs_ocfs2_nm_table[] = {
{ CTL_STR, 1, "hb_ctl_path" },
{}
};
static const struct bin_table bin_fs_ocfs2_table[] = {
{ CTL_DIR, 1, "nm", bin_fs_ocfs2_nm_table },
{}
};
static const struct bin_table bin_inotify_table[] = {
{ CTL_INT, INOTIFY_MAX_USER_INSTANCES, "max_user_instances" },
{ CTL_INT, INOTIFY_MAX_USER_WATCHES, "max_user_watches" },
{ CTL_INT, INOTIFY_MAX_QUEUED_EVENTS, "max_queued_events" },
{}
};
static const struct bin_table bin_fs_table[] = {
{ CTL_INT, FS_NRINODE, "inode-nr" },
{ CTL_INT, FS_STATINODE, "inode-state" },
/* FS_MAXINODE unused */
/* FS_NRDQUOT unused */
/* FS_MAXDQUOT unused */
/* FS_NRFILE "file-nr" no longer used */
{ CTL_INT, FS_MAXFILE, "file-max" },
{ CTL_INT, FS_DENTRY, "dentry-state" },
/* FS_NRSUPER unused */
/* FS_MAXUPSER unused */
{ CTL_INT, FS_OVERFLOWUID, "overflowuid" },
{ CTL_INT, FS_OVERFLOWGID, "overflowgid" },
{ CTL_INT, FS_LEASES, "leases-enable" },
{ CTL_INT, FS_DIR_NOTIFY, "dir-notify-enable" },
{ CTL_INT, FS_LEASE_TIME, "lease-break-time" },
{ CTL_DIR, FS_DQSTATS, "quota", bin_fs_quota_table },
{ CTL_DIR, FS_XFS, "xfs", bin_fs_xfs_table },
{ CTL_ULONG, FS_AIO_NR, "aio-nr" },
{ CTL_ULONG, FS_AIO_MAX_NR, "aio-max-nr" },
{ CTL_DIR, FS_INOTIFY, "inotify", bin_inotify_table },
{ CTL_DIR, FS_OCFS2, "ocfs2", bin_fs_ocfs2_table },
{ CTL_INT, KERN_SETUID_DUMPABLE, "suid_dumpable" },
{}
};
static const struct bin_table bin_ipmi_table[] = {
{ CTL_INT, DEV_IPMI_POWEROFF_POWERCYCLE, "poweroff_powercycle" },
{}
};
static const struct bin_table bin_mac_hid_files[] = {
/* DEV_MAC_HID_KEYBOARD_SENDS_LINUX_KEYCODES unused */
/* DEV_MAC_HID_KEYBOARD_LOCK_KEYCODES unused */
{ CTL_INT, DEV_MAC_HID_MOUSE_BUTTON_EMULATION, "mouse_button_emulation" },
{ CTL_INT, DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE, "mouse_button2_keycode" },
{ CTL_INT, DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE, "mouse_button3_keycode" },
/* DEV_MAC_HID_ADB_MOUSE_SENDS_KEYCODES unused */
{}
};
static const struct bin_table bin_raid_table[] = {
{ CTL_INT, DEV_RAID_SPEED_LIMIT_MIN, "speed_limit_min" },
{ CTL_INT, DEV_RAID_SPEED_LIMIT_MAX, "speed_limit_max" },
{}
};
static const struct bin_table bin_scsi_table[] = {
{ CTL_INT, DEV_SCSI_LOGGING_LEVEL, "logging_level" },
{}
};
static const struct bin_table bin_dev_table[] = {
/* DEV_CDROM "cdrom" no longer used */
/* DEV_HWMON unused */
/* DEV_PARPORT "parport" no longer used */
{ CTL_DIR, DEV_RAID, "raid", bin_raid_table },
{ CTL_DIR, DEV_MAC_HID, "mac_hid", bin_mac_hid_files },
{ CTL_DIR, DEV_SCSI, "scsi", bin_scsi_table },
{ CTL_DIR, DEV_IPMI, "ipmi", bin_ipmi_table },
{}
};
static const struct bin_table bin_bus_isa_table[] = {
{ CTL_INT, BUS_ISA_MEM_BASE, "membase" },
{ CTL_INT, BUS_ISA_PORT_BASE, "portbase" },
{ CTL_INT, BUS_ISA_PORT_SHIFT, "portshift" },
{}
};
static const struct bin_table bin_bus_table[] = {
{ CTL_DIR, CTL_BUS_ISA, "isa", bin_bus_isa_table },
{}
};
static const struct bin_table bin_s390dbf_table[] = {
{ CTL_INT, 5678 /* CTL_S390DBF_STOPPABLE */, "debug_stoppable" },
{ CTL_INT, 5679 /* CTL_S390DBF_ACTIVE */, "debug_active" },
{}
};
static const struct bin_table bin_sunrpc_table[] = {
/* CTL_RPCDEBUG "rpc_debug" no longer used */
/* CTL_NFSDEBUG "nfs_debug" no longer used */
/* CTL_NFSDDEBUG "nfsd_debug" no longer used */
/* CTL_NLMDEBUG "nlm_debug" no longer used */
{ CTL_INT, CTL_SLOTTABLE_UDP, "udp_slot_table_entries" },
{ CTL_INT, CTL_SLOTTABLE_TCP, "tcp_slot_table_entries" },
{ CTL_INT, CTL_MIN_RESVPORT, "min_resvport" },
{ CTL_INT, CTL_MAX_RESVPORT, "max_resvport" },
{}
};
static const struct bin_table bin_pm_table[] = {
/* frv specific */
/* 1 == CTL_PM_SUSPEND "suspend" no longer used" */
{ CTL_INT, 2 /* CTL_PM_CMODE */, "cmode" },
{ CTL_INT, 3 /* CTL_PM_P0 */, "p0" },
{ CTL_INT, 4 /* CTL_PM_CM */, "cm" },
{}
};
static const struct bin_table bin_root_table[] = {
{ CTL_DIR, CTL_KERN, "kernel", bin_kern_table },
{ CTL_DIR, CTL_VM, "vm", bin_vm_table },
{ CTL_DIR, CTL_NET, "net", bin_net_table },
/* CTL_PROC not used */
{ CTL_DIR, CTL_FS, "fs", bin_fs_table },
/* CTL_DEBUG "debug" no longer used */
{ CTL_DIR, CTL_DEV, "dev", bin_dev_table },
{ CTL_DIR, CTL_BUS, "bus", bin_bus_table },
{ CTL_DIR, CTL_ABI, "abi" },
/* CTL_CPU not used */
/* CTL_ARLAN "arlan" no longer used */
{ CTL_DIR, CTL_S390DBF, "s390dbf", bin_s390dbf_table },
{ CTL_DIR, CTL_SUNRPC, "sunrpc", bin_sunrpc_table },
{ CTL_DIR, CTL_PM, "pm", bin_pm_table },
{}
};
static ssize_t bin_dir(struct file *file,
void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
{
return -ENOTDIR;
}
static ssize_t bin_string(struct file *file,
void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
{
ssize_t result, copied = 0;
if (oldval && oldlen) {
char __user *lastp;
loff_t pos = 0;
int ch;
result = vfs_read(file, oldval, oldlen, &pos);
if (result < 0)
goto out;
copied = result;
lastp = oldval + copied - 1;
result = -EFAULT;
if (get_user(ch, lastp))
goto out;
/* Trim off the trailing newline */
if (ch == '\n') {
result = -EFAULT;
if (put_user('\0', lastp))
goto out;
copied -= 1;
}
}
if (newval && newlen) {
loff_t pos = 0;
result = vfs_write(file, newval, newlen, &pos);
if (result < 0)
goto out;
}
result = copied;
out:
return result;
}
static ssize_t bin_intvec(struct file *file,
void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
{
ssize_t copied = 0;
char *buffer;
ssize_t result;
result = -ENOMEM;
buffer = kmalloc(BUFSZ, GFP_KERNEL);
if (!buffer)
goto out;
if (oldval && oldlen) {
unsigned __user *vec = oldval;
size_t length = oldlen / sizeof(*vec);
char *str, *end;
int i;
export kernel_write(), convert open-coded instances Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-24 03:51:48 +08:00
result = kernel_read(file, 0, buffer, BUFSZ - 1);
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
if (result < 0)
goto out_kfree;
str = buffer;
end = str + result;
*end++ = '\0';
for (i = 0; i < length; i++) {
unsigned long value;
value = simple_strtoul(str, &str, 10);
while (isspace(*str))
str++;
result = -EFAULT;
if (put_user(value, vec + i))
goto out_kfree;
copied += sizeof(*vec);
if (!isdigit(*str))
break;
}
}
if (newval && newlen) {
unsigned __user *vec = newval;
size_t length = newlen / sizeof(*vec);
char *str, *end;
int i;
str = buffer;
end = str + BUFSZ;
for (i = 0; i < length; i++) {
unsigned long value;
result = -EFAULT;
if (get_user(value, vec + i))
goto out_kfree;
kernel/sysctl_binary.c: use scnprintf() instead of snprintf() snprintf() will return the 'ideal' length which may be larger than real buffer length, if we only want to use real length, need use scnprintf() instead of. Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-11-13 07:11:22 +08:00
str += scnprintf(str, end - str, "%lu\t", value);
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
}
export kernel_write(), convert open-coded instances Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-24 03:51:48 +08:00
result = kernel_write(file, buffer, str - buffer, 0);
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
if (result < 0)
goto out_kfree;
}
result = copied;
out_kfree:
kfree(buffer);
out:
return result;
}
static ssize_t bin_ulongvec(struct file *file,
void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
{
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
ssize_t copied = 0;
char *buffer;
ssize_t result;
result = -ENOMEM;
buffer = kmalloc(BUFSZ, GFP_KERNEL);
if (!buffer)
goto out;
if (oldval && oldlen) {
unsigned long __user *vec = oldval;
size_t length = oldlen / sizeof(*vec);
char *str, *end;
int i;
export kernel_write(), convert open-coded instances Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-24 03:51:48 +08:00
result = kernel_read(file, 0, buffer, BUFSZ - 1);
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
if (result < 0)
goto out_kfree;
str = buffer;
end = str + result;
*end++ = '\0';
for (i = 0; i < length; i++) {
unsigned long value;
value = simple_strtoul(str, &str, 10);
while (isspace(*str))
str++;
result = -EFAULT;
if (put_user(value, vec + i))
goto out_kfree;
copied += sizeof(*vec);
if (!isdigit(*str))
break;
}
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
}
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
if (newval && newlen) {
unsigned long __user *vec = newval;
size_t length = newlen / sizeof(*vec);
char *str, *end;
int i;
str = buffer;
end = str + BUFSZ;
for (i = 0; i < length; i++) {
unsigned long value;
result = -EFAULT;
if (get_user(value, vec + i))
goto out_kfree;
kernel/sysctl_binary.c: use scnprintf() instead of snprintf() snprintf() will return the 'ideal' length which may be larger than real buffer length, if we only want to use real length, need use scnprintf() instead of. Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-11-13 07:11:22 +08:00
str += scnprintf(str, end - str, "%lu\t", value);
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
}
export kernel_write(), convert open-coded instances Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-24 03:51:48 +08:00
result = kernel_write(file, buffer, str - buffer, 0);
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
if (result < 0)
goto out_kfree;
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
}
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
result = copied;
out_kfree:
kfree(buffer);
out:
return result;
}
static ssize_t bin_uuid(struct file *file,
void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
{
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
ssize_t result, copied = 0;
/* Only supports reads */
if (oldval && oldlen) {
char buf[40], *str = buf;
unsigned char uuid[16];
int i;
export kernel_write(), convert open-coded instances Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-24 03:51:48 +08:00
result = kernel_read(file, 0, buf, sizeof(buf) - 1);
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
if (result < 0)
goto out;
buf[result] = '\0';
/* Convert the uuid to from a string to binary */
for (i = 0; i < 16; i++) {
result = -EIO;
if (!isxdigit(str[0]) || !isxdigit(str[1]))
goto out;
sysctl: don't use own implementation of hex_to_bin() Remove own implementation of hex_to_bin(). Signed-off-by: Andy Shevchenko <ext-andriy.shevchenko@nokia.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-05-25 05:33:26 +08:00
uuid[i] = (hex_to_bin(str[0]) << 4) |
hex_to_bin(str[1]);
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
str += 2;
if (*str == '-')
str++;
}
if (oldlen > 16)
oldlen = 16;
result = -EFAULT;
if (copy_to_user(oldval, uuid, oldlen))
goto out;
copied = oldlen;
}
result = copied;
out:
return result;
}
static ssize_t bin_dn_node_address(struct file *file,
void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
{
ssize_t result, copied = 0;
if (oldval && oldlen) {
char buf[15], *nodep;
unsigned long area, node;
__le16 dnaddr;
export kernel_write(), convert open-coded instances Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-24 03:51:48 +08:00
result = kernel_read(file, 0, buf, sizeof(buf) - 1);
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
if (result < 0)
goto out;
buf[result] = '\0';
tree-wide: fix comment/printk typos "gadget", "through", "command", "maintain", "maintain", "controller", "address", "between", "initiali[zs]e", "instead", "function", "select", "already", "equal", "access", "management", "hierarchy", "registration", "interest", "relative", "memory", "offset", "already", Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-11-02 03:38:34 +08:00
/* Convert the decnet address to binary */
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
result = -EIO;
sysctl: fix null checking in bin_dn_node_address() The null check of `strchr() + 1' is broken, which is always non-null, leading to OOB read. Instead, check the result of strchr(). Signed-off-by: Xi Wang <xi.wang@gmail.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-28 09:05:21 +08:00
nodep = strchr(buf, '.');
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
if (!nodep)
goto out;
sysctl: fix null checking in bin_dn_node_address() The null check of `strchr() + 1' is broken, which is always non-null, leading to OOB read. Instead, check the result of strchr(). Signed-off-by: Xi Wang <xi.wang@gmail.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-28 09:05:21 +08:00
++nodep;
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
area = simple_strtoul(buf, NULL, 10);
node = simple_strtoul(nodep, NULL, 10);
result = -EIO;
if ((area > 63)||(node > 1023))
goto out;
dnaddr = cpu_to_le16((area << 10) | node);
result = -EFAULT;
if (put_user(dnaddr, (__le16 __user *)oldval))
goto out;
copied = sizeof(dnaddr);
}
if (newval && newlen) {
__le16 dnaddr;
char buf[15];
int len;
result = -EINVAL;
if (newlen != sizeof(dnaddr))
goto out;
result = -EFAULT;
if (get_user(dnaddr, (__le16 __user *)newval))
goto out;
kernel/sysctl_binary.c: use scnprintf() instead of snprintf() snprintf() will return the 'ideal' length which may be larger than real buffer length, if we only want to use real length, need use scnprintf() instead of. Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-11-13 07:11:22 +08:00
len = scnprintf(buf, sizeof(buf), "%hu.%hu",
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
le16_to_cpu(dnaddr) >> 10,
le16_to_cpu(dnaddr) & 0x3ff);
export kernel_write(), convert open-coded instances Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-24 03:51:48 +08:00
result = kernel_write(file, buf, len, 0);
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
if (result < 0)
goto out;
}
result = copied;
out:
return result;
}
static const struct bin_table *get_sysctl(const int *name, int nlen, char *path)
{
const struct bin_table *table = &bin_root_table[0];
int ctl_name;
sysctl: sysctl_binary.c Fix compilation when !CONFIG_NET dev_get_by_index does not exist when the network stack is not compiled in, so only include the code to follow wild card paths when the network stack is present. I have shuffled the code around a little to make it clear that dev_put is called after dev_get_by_index showing that there is no leak. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-12 16:35:55 +08:00
/* The binary sysctl tables have a small maximum depth so
* there is no danger of overflowing our path as it PATH_MAX
* bytes long.
*/
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
memcpy(path, "sys/", 4);
path += 4;
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
repeat:
if (!nlen)
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
return ERR_PTR(-ENOTDIR);
ctl_name = *name;
name++;
nlen--;
for ( ; table->convert; table++) {
sysctl: sysctl_binary.c Fix compilation when !CONFIG_NET dev_get_by_index does not exist when the network stack is not compiled in, so only include the code to follow wild card paths when the network stack is present. I have shuffled the code around a little to make it clear that dev_put is called after dev_get_by_index showing that there is no leak. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-12 16:35:55 +08:00
int len = 0;
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
/*
* For a wild card entry map from ifindex to network
* device name.
*/
sysctl binary: Reorder the tests to process wild card entries first. A malicious user could have passed in a ctl_name of 0 and triggered the well know ctl_name to procname mapping code, instead of the wild card matching code. This is a slight problem as wild card entries don't have procnames, and because in some alternate universe a network device might have ifindex 0. So test for and handle wild card entries first. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-12 17:39:06 +08:00
if (!table->ctl_name) {
#ifdef CONFIG_NET
sysctl: sysctl_binary.c Fix compilation when !CONFIG_NET dev_get_by_index does not exist when the network stack is not compiled in, so only include the code to follow wild card paths when the network stack is present. I have shuffled the code around a little to make it clear that dev_put is called after dev_get_by_index showing that there is no leak. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-12 16:35:55 +08:00
struct net *net = current->nsproxy->net_ns;
struct net_device *dev;
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
dev = dev_get_by_index(net, ctl_name);
sysctl: sysctl_binary.c Fix compilation when !CONFIG_NET dev_get_by_index does not exist when the network stack is not compiled in, so only include the code to follow wild card paths when the network stack is present. I have shuffled the code around a little to make it clear that dev_put is called after dev_get_by_index showing that there is no leak. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-12 16:35:55 +08:00
if (dev) {
len = strlen(dev->name);
memcpy(path, dev->name, len);
dev_put(dev);
}
#endif
sysctl binary: Reorder the tests to process wild card entries first. A malicious user could have passed in a ctl_name of 0 and triggered the well know ctl_name to procname mapping code, instead of the wild card matching code. This is a slight problem as wild card entries don't have procnames, and because in some alternate universe a network device might have ifindex 0. So test for and handle wild card entries first. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-12 17:39:06 +08:00
/* Use the well known sysctl number to proc name mapping */
} else if (ctl_name == table->ctl_name) {
len = strlen(table->procname);
memcpy(path, table->procname, len);
}
sysctl: sysctl_binary.c Fix compilation when !CONFIG_NET dev_get_by_index does not exist when the network stack is not compiled in, so only include the code to follow wild card paths when the network stack is present. I have shuffled the code around a little to make it clear that dev_put is called after dev_get_by_index showing that there is no leak. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-12 16:35:55 +08:00
if (len) {
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
path += len;
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
if (table->child) {
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
*path++ = '/';
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
table = table->child;
goto repeat;
}
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
*path = '\0';
return table;
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
}
}
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
return ERR_PTR(-ENOTDIR);
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
}
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
static char *sysctl_getname(const int *name, int nlen, const struct bin_table **tablep)
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
{
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
char *tmp, *result;
result = ERR_PTR(-ENOMEM);
tmp = __getname();
if (tmp) {
const struct bin_table *table = get_sysctl(name, nlen, tmp);
result = tmp;
*tablep = table;
if (IS_ERR(table)) {
__putname(tmp);
result = ERR_CAST(table);
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
}
}
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
return result;
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
}
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
static ssize_t binary_sysctl(const int *name, int nlen,
void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
{
const struct bin_table *table = NULL;
struct vfsmount *mnt;
struct file *file;
ssize_t result;
char *pathname;
int flags;
pathname = sysctl_getname(name, nlen, &table);
result = PTR_ERR(pathname);
if (IS_ERR(pathname))
goto out;
/* How should the sysctl be accessed? */
if (oldval && oldlen && newval && newlen) {
flags = O_RDWR;
} else if (newval && newlen) {
flags = O_WRONLY;
} else if (oldval && oldlen) {
flags = O_RDONLY;
} else {
result = 0;
goto out_putname;
}
pidns: Use task_active_pid_ns where appropriate The expressions tsk->nsproxy->pid_ns and task_active_pid_ns aka ns_of_pid(task_pid(tsk)) should have the same number of cache line misses with the practical difference that ns_of_pid(task_pid(tsk)) is released later in a processes life. Furthermore by using task_active_pid_ns it becomes trivial to write an unshare implementation for the the pid namespace. So I have used task_active_pid_ns everywhere I can. In fork since the pid has not yet been attached to the process I use ns_of_pid, to achieve the same effect. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2010-03-03 06:51:53 +08:00
mnt = task_active_pid_ns(current)->proc_mnt;
open-style analog of vfs_path_lookup() new function: file_open_root(dentry, mnt, name, flags) opens the file vfs_path_lookup would arrive to. Note that name can be empty; in that case the usual requirement that dentry should be a directory is lifted. open-coded equivalents switched to it, may_open() got down exactly one caller and became static. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-03-12 01:08:24 +08:00
file = file_open_root(mnt->mnt_root, mnt, pathname, flags);
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
result = PTR_ERR(file);
if (IS_ERR(file))
goto out_putname;
result = table->convert(file, oldval, oldlen, newval, newlen);
fput(file);
out_putname:
binary_sysctl(): fix memory leak binary_sysctl() calls sysctl_getname() which allocates from names_cache slab usin __getname() The matching function to free the name is __putname(), and not putname() which should be used only to match getname() allocations. This is because when auditing is enabled, putname() calls audit_putname *instead* (not in addition) to __putname(). Then, if a syscall is in progress, audit_putname does not release the name - instead, it expects the name to get released when the syscall completes, but that will happen only if audit_getname() was called previously, i.e. if the name was allocated with getname() rather than the naked __getname(). So, __getname() followed by putname() ends up leaking memory. Signed-off-by: Michel Lespinasse <walken@google.com> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@infradead.org> Cc: Eric Paris <eparis@redhat.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-12-20 09:12:06 +08:00
__putname(pathname);
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
out:
return result;
}
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
#else /* CONFIG_SYSCTL_SYSCALL */
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
static ssize_t binary_sysctl(const int *name, int nlen,
void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
{
sysctl: Refactor the binary sysctl handling to remove duplicate code Read in the binary sysctl path once, instead of reread it from user space each time the code needs to access a path element. The deprecated sysctl warning is moved to do_sysctl so that the compat_sysctl entries syscalls will also warn. The return of -ENOSYS when !CONFIG_SYSCTL_SYSCALL is moved to binary_sysctl. Always leaving a do_sysctl available that handles !CONFIG_SYSCTL_SYSCALL and printing the deprecated sysctl warning allows for a single defitition of the sysctl syscall. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 15:09:33 +08:00
return -ENOSYS;
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
}
#endif /* CONFIG_SYSCTL_SYSCALL */
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
sysctl: Refactor the binary sysctl handling to remove duplicate code Read in the binary sysctl path once, instead of reread it from user space each time the code needs to access a path element. The deprecated sysctl warning is moved to do_sysctl so that the compat_sysctl entries syscalls will also warn. The return of -ENOSYS when !CONFIG_SYSCTL_SYSCALL is moved to binary_sysctl. Always leaving a do_sysctl available that handles !CONFIG_SYSCTL_SYSCALL and printing the deprecated sysctl warning allows for a single defitition of the sysctl syscall. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 15:09:33 +08:00
static void deprecated_sysctl_warning(const int *name, int nlen)
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
{
int i;
[sysctl] Fix breakage on systems with older glibc As predicted during code review, the sysctl(2) changes made systems with old glibc nearly unusable. About every command gives a: warning: process `ls' used the deprecated sysctl system call with 1.4 warning in the log. I see this on a SUSE 10.0 system with glibc 2.3.5. Don't warn for this common case. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-16 19:28:44 +08:00
/*
* CTL_KERN/KERN_VERSION is used by older glibc and cannot
* ever go away.
*/
if (name[0] == CTL_KERN && name[1] == KERN_VERSION)
return;
sysctl: Warn about all uses of sys_sysctl. Now that the glibc pthread implemenation no longers uses sysctl() users of sysctl are as rare as hen's teeth. So remove the glibc exception from the warning, and use the standard printk_ratelimit instead of rolling our own. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-12 11:32:48 +08:00
if (printk_ratelimit()) {
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
printk(KERN_INFO
"warning: process `%s' used the deprecated sysctl "
"system call with ", current->comm);
sysctl: Refactor the binary sysctl handling to remove duplicate code Read in the binary sysctl path once, instead of reread it from user space each time the code needs to access a path element. The deprecated sysctl warning is moved to do_sysctl so that the compat_sysctl entries syscalls will also warn. The return of -ENOSYS when !CONFIG_SYSCTL_SYSCALL is moved to binary_sysctl. Always leaving a do_sysctl available that handles !CONFIG_SYSCTL_SYSCALL and printing the deprecated sysctl warning allows for a single defitition of the sysctl syscall. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 15:09:33 +08:00
for (i = 0; i < nlen; i++)
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
printk("%d.", name[i]);
printk("\n");
}
sysctl: Refactor the binary sysctl handling to remove duplicate code Read in the binary sysctl path once, instead of reread it from user space each time the code needs to access a path element. The deprecated sysctl warning is moved to do_sysctl so that the compat_sysctl entries syscalls will also warn. The return of -ENOSYS when !CONFIG_SYSCTL_SYSCALL is moved to binary_sysctl. Always leaving a do_sysctl available that handles !CONFIG_SYSCTL_SYSCALL and printing the deprecated sysctl warning allows for a single defitition of the sysctl syscall. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 15:09:33 +08:00
return;
}
SYSCTL: Print binary sysctl warnings (nearly) only once When printing legacy sysctls print the warning message for each of them only once. This way there is a guarantee the syslog won't be flooded for any sane program. The original attempt at this made the tables non const and stored the flag inline. Linus suggested using a separate hash table for this, this is based on a code snippet from him. The hash implies this is not exact and can sometimes not print a new sysctl due to a hash collision, but in practice this should not be a problem I used a FNV32 hash over the binary string with a 32byte bitmap. This gives relatively little collisions when all the predefined binary sysctls are hashed: size 256 bucket length number 0: [25] 1: [67] 2: [88] 3: [47] 4: [22] 5: [6] 6: [1] The worst case is a single collision of 6 hash values. Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-12-24 04:00:20 +08:00
#define WARN_ONCE_HASH_BITS 8
#define WARN_ONCE_HASH_SIZE (1<<WARN_ONCE_HASH_BITS)
static DECLARE_BITMAP(warn_once_bitmap, WARN_ONCE_HASH_SIZE);
#define FNV32_OFFSET 2166136261U
#define FNV32_PRIME 0x01000193
/*
* Print each legacy sysctl (approximately) only once.
* To avoid making the tables non-const use a external
* hash-table instead.
* Worst case hash collision: 6, but very rarely.
* NOTE! We don't use the SMP-safe bit tests. We simply
* don't care enough.
*/
static void warn_on_bintable(const int *name, int nlen)
{
int i;
u32 hash = FNV32_OFFSET;
for (i = 0; i < nlen; i++)
hash = (hash ^ name[i]) * FNV32_PRIME;
hash %= WARN_ONCE_HASH_SIZE;
if (__test_and_set_bit(hash, warn_once_bitmap))
return;
deprecated_sysctl_warning(name, nlen);
}
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
static ssize_t do_sysctl(int __user *args_name, int nlen,
void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
sysctl: Refactor the binary sysctl handling to remove duplicate code Read in the binary sysctl path once, instead of reread it from user space each time the code needs to access a path element. The deprecated sysctl warning is moved to do_sysctl so that the compat_sysctl entries syscalls will also warn. The return of -ENOSYS when !CONFIG_SYSCTL_SYSCALL is moved to binary_sysctl. Always leaving a do_sysctl available that handles !CONFIG_SYSCTL_SYSCALL and printing the deprecated sysctl warning allows for a single defitition of the sysctl syscall. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 15:09:33 +08:00
{
int name[CTL_MAXNAME];
int i;
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
/* Check args->nlen. */
if (nlen < 0 || nlen > CTL_MAXNAME)
sysctl: Refactor the binary sysctl handling to remove duplicate code Read in the binary sysctl path once, instead of reread it from user space each time the code needs to access a path element. The deprecated sysctl warning is moved to do_sysctl so that the compat_sysctl entries syscalls will also warn. The return of -ENOSYS when !CONFIG_SYSCTL_SYSCALL is moved to binary_sysctl. Always leaving a do_sysctl available that handles !CONFIG_SYSCTL_SYSCALL and printing the deprecated sysctl warning allows for a single defitition of the sysctl syscall. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 15:09:33 +08:00
return -ENOTDIR;
/* Read in the sysctl name for simplicity */
for (i = 0; i < nlen; i++)
if (get_user(name[i], args_name + i))
return -EFAULT;
SYSCTL: Print binary sysctl warnings (nearly) only once When printing legacy sysctls print the warning message for each of them only once. This way there is a guarantee the syslog won't be flooded for any sane program. The original attempt at this made the tables non const and stored the flag inline. Linus suggested using a separate hash table for this, this is based on a code snippet from him. The hash implies this is not exact and can sometimes not print a new sysctl due to a hash collision, but in practice this should not be a problem I used a FNV32 hash over the binary string with a 32byte bitmap. This gives relatively little collisions when all the predefined binary sysctls are hashed: size 256 bucket length number 0: [25] 1: [67] 2: [88] 3: [47] 4: [22] 5: [6] 6: [1] The worst case is a single collision of 6 hash values. Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-12-24 04:00:20 +08:00
warn_on_bintable(name, nlen);
sysctl: Refactor the binary sysctl handling to remove duplicate code Read in the binary sysctl path once, instead of reread it from user space each time the code needs to access a path element. The deprecated sysctl warning is moved to do_sysctl so that the compat_sysctl entries syscalls will also warn. The return of -ENOSYS when !CONFIG_SYSCTL_SYSCALL is moved to binary_sysctl. Always leaving a do_sysctl available that handles !CONFIG_SYSCTL_SYSCALL and printing the deprecated sysctl warning allows for a single defitition of the sysctl syscall. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 15:09:33 +08:00
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
return binary_sysctl(name, nlen, oldval, oldlen, newval, newlen);
sysctl: Refactor the binary sysctl handling to remove duplicate code Read in the binary sysctl path once, instead of reread it from user space each time the code needs to access a path element. The deprecated sysctl warning is moved to do_sysctl so that the compat_sysctl entries syscalls will also warn. The return of -ENOSYS when !CONFIG_SYSCTL_SYSCALL is moved to binary_sysctl. Always leaving a do_sysctl available that handles !CONFIG_SYSCTL_SYSCALL and printing the deprecated sysctl warning allows for a single defitition of the sysctl syscall. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 15:09:33 +08:00
}
SYSCALL_DEFINE1(sysctl, struct __sysctl_args __user *, args)
{
struct __sysctl_args tmp;
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
size_t oldlen = 0;
ssize_t result;
sysctl: Refactor the binary sysctl handling to remove duplicate code Read in the binary sysctl path once, instead of reread it from user space each time the code needs to access a path element. The deprecated sysctl warning is moved to do_sysctl so that the compat_sysctl entries syscalls will also warn. The return of -ENOSYS when !CONFIG_SYSCTL_SYSCALL is moved to binary_sysctl. Always leaving a do_sysctl available that handles !CONFIG_SYSCTL_SYSCALL and printing the deprecated sysctl warning allows for a single defitition of the sysctl syscall. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 15:09:33 +08:00
if (copy_from_user(&tmp, args, sizeof(tmp)))
return -EFAULT;
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
if (tmp.oldval && !tmp.oldlenp)
return -EFAULT;
if (tmp.oldlenp && get_user(oldlen, tmp.oldlenp))
return -EFAULT;
result = do_sysctl(tmp.name, tmp.nlen, tmp.oldval, oldlen,
tmp.newval, tmp.newlen);
if (result >= 0) {
oldlen = result;
result = 0;
}
sysctl: Refactor the binary sysctl handling to remove duplicate code Read in the binary sysctl path once, instead of reread it from user space each time the code needs to access a path element. The deprecated sysctl warning is moved to do_sysctl so that the compat_sysctl entries syscalls will also warn. The return of -ENOSYS when !CONFIG_SYSCTL_SYSCALL is moved to binary_sysctl. Always leaving a do_sysctl available that handles !CONFIG_SYSCTL_SYSCALL and printing the deprecated sysctl warning allows for a single defitition of the sysctl syscall. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 15:09:33 +08:00
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
if (tmp.oldlenp && put_user(oldlen, tmp.oldlenp))
return -EFAULT;
return result;
sysctl: Separate the binary sysctl logic into it's own file. In preparation for more invasive cleanups separate the core binary sysctl logic into it's own file. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 14:44:59 +08:00
}
sysctl: Introduce a generic compat sysctl sysctl This uses compat_alloc_userspace to remove the various hacks to allow do_sysctl to write to throuh oldlenp. The rest of our mature compat syscall helper facitilies are used as well to ensure we have a nice clean maintainable compat syscall that can be used on all architectures. The motiviation for a generic compat sysctl (besides the obvious hack removal) is to reduce the number of compat sysctl defintions out there so I can refactor the binary sysctl implementation. ppc already used the name compat_sys_sysctl so I remove the ppcs version here. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 15:36:27 +08:00
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
sysctl: Introduce a generic compat sysctl sysctl This uses compat_alloc_userspace to remove the various hacks to allow do_sysctl to write to throuh oldlenp. The rest of our mature compat syscall helper facitilies are used as well to ensure we have a nice clean maintainable compat syscall that can be used on all architectures. The motiviation for a generic compat sysctl (besides the obvious hack removal) is to reduce the number of compat sysctl defintions out there so I can refactor the binary sysctl implementation. ppc already used the name compat_sys_sysctl so I remove the ppcs version here. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 15:36:27 +08:00
#ifdef CONFIG_COMPAT
struct compat_sysctl_args {
compat_uptr_t name;
int nlen;
compat_uptr_t oldval;
compat_uptr_t oldlenp;
compat_uptr_t newval;
compat_size_t newlen;
compat_ulong_t __unused[4];
};
switch compat_sys_sysctl to COMPAT_SYSCALL_DEFINE Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-03-20 02:25:51 +08:00
COMPAT_SYSCALL_DEFINE1(sysctl, struct compat_sysctl_args __user *, args)
sysctl: Introduce a generic compat sysctl sysctl This uses compat_alloc_userspace to remove the various hacks to allow do_sysctl to write to throuh oldlenp. The rest of our mature compat syscall helper facitilies are used as well to ensure we have a nice clean maintainable compat syscall that can be used on all architectures. The motiviation for a generic compat sysctl (besides the obvious hack removal) is to reduce the number of compat sysctl defintions out there so I can refactor the binary sysctl implementation. ppc already used the name compat_sys_sysctl so I remove the ppcs version here. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 15:36:27 +08:00
{
struct compat_sysctl_args tmp;
compat_size_t __user *compat_oldlenp;
size_t oldlen = 0;
ssize_t result;
if (copy_from_user(&tmp, args, sizeof(tmp)))
return -EFAULT;
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
if (tmp.oldval && !tmp.oldlenp)
return -EFAULT;
sysctl: Introduce a generic compat sysctl sysctl This uses compat_alloc_userspace to remove the various hacks to allow do_sysctl to write to throuh oldlenp. The rest of our mature compat syscall helper facitilies are used as well to ensure we have a nice clean maintainable compat syscall that can be used on all architectures. The motiviation for a generic compat sysctl (besides the obvious hack removal) is to reduce the number of compat sysctl defintions out there so I can refactor the binary sysctl implementation. ppc already used the name compat_sys_sysctl so I remove the ppcs version here. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 15:36:27 +08:00
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
compat_oldlenp = compat_ptr(tmp.oldlenp);
if (compat_oldlenp && get_user(oldlen, compat_oldlenp))
return -EFAULT;
sysctl: Introduce a generic compat sysctl sysctl This uses compat_alloc_userspace to remove the various hacks to allow do_sysctl to write to throuh oldlenp. The rest of our mature compat syscall helper facitilies are used as well to ensure we have a nice clean maintainable compat syscall that can be used on all architectures. The motiviation for a generic compat sysctl (besides the obvious hack removal) is to reduce the number of compat sysctl defintions out there so I can refactor the binary sysctl implementation. ppc already used the name compat_sys_sysctl so I remove the ppcs version here. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 15:36:27 +08:00
result = do_sysctl(compat_ptr(tmp.name), tmp.nlen,
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
compat_ptr(tmp.oldval), oldlen,
sysctl: Introduce a generic compat sysctl sysctl This uses compat_alloc_userspace to remove the various hacks to allow do_sysctl to write to throuh oldlenp. The rest of our mature compat syscall helper facitilies are used as well to ensure we have a nice clean maintainable compat syscall that can be used on all architectures. The motiviation for a generic compat sysctl (besides the obvious hack removal) is to reduce the number of compat sysctl defintions out there so I can refactor the binary sysctl implementation. ppc already used the name compat_sys_sysctl so I remove the ppcs version here. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 15:36:27 +08:00
compat_ptr(tmp.newval), tmp.newlen);
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
if (result >= 0) {
oldlen = result;
result = 0;
sysctl: Introduce a generic compat sysctl sysctl This uses compat_alloc_userspace to remove the various hacks to allow do_sysctl to write to throuh oldlenp. The rest of our mature compat syscall helper facitilies are used as well to ensure we have a nice clean maintainable compat syscall that can be used on all architectures. The motiviation for a generic compat sysctl (besides the obvious hack removal) is to reduce the number of compat sysctl defintions out there so I can refactor the binary sysctl implementation. ppc already used the name compat_sys_sysctl so I remove the ppcs version here. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 15:36:27 +08:00
}
sysctl: Reduce sys_sysctl to a compatibility wrapper around /proc/sys To simply maintenance and to be able to remove all of the binary sysctl support from various subsystems I have rewritten the binary sysctl code as a compatibility wrapper around proc/sys. The code is built around a hard coded table based on the table in sysctl_check.c that lists all of our current binary sysctls and provides enough information to convert from the sysctl binary input into into ascii and back again. New in this patch is the realization that the only dynamic entries that need to be handled have ifname as the asscii string and ifindex as their ctl_name. When a sys_sysctl is called the code now looks in the translation table converting the binary name to the path under /proc where the value is to be found. Opens that file, and calls into a format conversion wrapper that calls fop->read and then fop->write as appropriate. Since in practice the practically no one uses or tests sys_sysctl rewritting the code to be beautiful is a little silly. The redeeming merit of this work is it allows us to rip out all of the binary sysctl syscall support from everywhere else in the tree. Allowing us to remove a lot of dead (after this patch) and barely maintained code. In addition it becomes much easier to optimize the sysctl implementation for being the backing store of /proc/sys, without having to worry about sys_sysctl. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-05 21:26:41 +08:00
if (compat_oldlenp && put_user(oldlen, compat_oldlenp))
return -EFAULT;
sysctl: Introduce a generic compat sysctl sysctl This uses compat_alloc_userspace to remove the various hacks to allow do_sysctl to write to throuh oldlenp. The rest of our mature compat syscall helper facitilies are used as well to ensure we have a nice clean maintainable compat syscall that can be used on all architectures. The motiviation for a generic compat sysctl (besides the obvious hack removal) is to reduce the number of compat sysctl defintions out there so I can refactor the binary sysctl implementation. ppc already used the name compat_sys_sysctl so I remove the ppcs version here. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-04-03 15:36:27 +08:00
return result;
}
#endif /* CONFIG_COMPAT */
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