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kernel/timer.c: move some non timer related syscalls to kernel/sys.c
Andrew Morton noted: akpm3:/usr/src/25> grep SYSCALL kernel/timer.c SYSCALL_DEFINE1(alarm, unsigned int, seconds) SYSCALL_DEFINE0(getpid) SYSCALL_DEFINE0(getppid) SYSCALL_DEFINE0(getuid) SYSCALL_DEFINE0(geteuid) SYSCALL_DEFINE0(getgid) SYSCALL_DEFINE0(getegid) SYSCALL_DEFINE0(gettid) SYSCALL_DEFINE1(sysinfo, struct sysinfo __user *, info) COMPAT_SYSCALL_DEFINE1(sysinfo, struct compat_sysinfo __user *, info) Only one of those should be in kernel/timer.c. Who wrote this thing? [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Stephen Rothwell
Linus Torvalds
parent
1043f65a57
commit
4a22f16636
211
kernel/sys.c
211
kernel/sys.c
@ -49,6 +49,11 @@
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#include <linux/user_namespace.h>
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#include <linux/binfmts.h>
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#include <linux/sched.h>
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#include <linux/rcupdate.h>
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#include <linux/uidgid.h>
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#include <linux/cred.h>
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#include <linux/kmsg_dump.h>
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/* Move somewhere else to avoid recompiling? */
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#include <generated/utsrelease.h>
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@ -1044,6 +1049,67 @@ change_okay:
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return old_fsgid;
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}
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/**
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* sys_getpid - return the thread group id of the current process
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*
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* Note, despite the name, this returns the tgid not the pid. The tgid and
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* the pid are identical unless CLONE_THREAD was specified on clone() in
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* which case the tgid is the same in all threads of the same group.
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*
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* This is SMP safe as current->tgid does not change.
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*/
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SYSCALL_DEFINE0(getpid)
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{
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return task_tgid_vnr(current);
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}
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/* Thread ID - the internal kernel "pid" */
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SYSCALL_DEFINE0(gettid)
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{
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return task_pid_vnr(current);
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}
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/*
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* Accessing ->real_parent is not SMP-safe, it could
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* change from under us. However, we can use a stale
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* value of ->real_parent under rcu_read_lock(), see
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* release_task()->call_rcu(delayed_put_task_struct).
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*/
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SYSCALL_DEFINE0(getppid)
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{
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int pid;
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rcu_read_lock();
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pid = task_tgid_vnr(rcu_dereference(current->real_parent));
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rcu_read_unlock();
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return pid;
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}
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SYSCALL_DEFINE0(getuid)
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{
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/* Only we change this so SMP safe */
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return from_kuid_munged(current_user_ns(), current_uid());
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}
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SYSCALL_DEFINE0(geteuid)
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{
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/* Only we change this so SMP safe */
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return from_kuid_munged(current_user_ns(), current_euid());
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}
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SYSCALL_DEFINE0(getgid)
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{
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/* Only we change this so SMP safe */
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return from_kgid_munged(current_user_ns(), current_gid());
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}
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SYSCALL_DEFINE0(getegid)
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{
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/* Only we change this so SMP safe */
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return from_kgid_munged(current_user_ns(), current_egid());
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}
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void do_sys_times(struct tms *tms)
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{
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cputime_t tgutime, tgstime, cutime, cstime;
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@ -2245,3 +2311,148 @@ int orderly_poweroff(bool force)
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return 0;
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}
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EXPORT_SYMBOL_GPL(orderly_poweroff);
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/**
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* do_sysinfo - fill in sysinfo struct
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* @info: pointer to buffer to fill
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*/
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static int do_sysinfo(struct sysinfo *info)
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{
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unsigned long mem_total, sav_total;
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unsigned int mem_unit, bitcount;
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struct timespec tp;
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memset(info, 0, sizeof(struct sysinfo));
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ktime_get_ts(&tp);
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monotonic_to_bootbased(&tp);
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info->uptime = tp.tv_sec + (tp.tv_nsec ? 1 : 0);
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get_avenrun(info->loads, 0, SI_LOAD_SHIFT - FSHIFT);
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info->procs = nr_threads;
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si_meminfo(info);
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si_swapinfo(info);
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/*
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* If the sum of all the available memory (i.e. ram + swap)
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* is less than can be stored in a 32 bit unsigned long then
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* we can be binary compatible with 2.2.x kernels. If not,
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* well, in that case 2.2.x was broken anyways...
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*
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* -Erik Andersen <andersee@debian.org>
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*/
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mem_total = info->totalram + info->totalswap;
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if (mem_total < info->totalram || mem_total < info->totalswap)
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goto out;
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bitcount = 0;
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mem_unit = info->mem_unit;
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while (mem_unit > 1) {
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bitcount++;
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mem_unit >>= 1;
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sav_total = mem_total;
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mem_total <<= 1;
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if (mem_total < sav_total)
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goto out;
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}
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/*
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* If mem_total did not overflow, multiply all memory values by
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* info->mem_unit and set it to 1. This leaves things compatible
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* with 2.2.x, and also retains compatibility with earlier 2.4.x
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* kernels...
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*/
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info->mem_unit = 1;
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info->totalram <<= bitcount;
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info->freeram <<= bitcount;
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info->sharedram <<= bitcount;
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info->bufferram <<= bitcount;
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info->totalswap <<= bitcount;
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info->freeswap <<= bitcount;
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info->totalhigh <<= bitcount;
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info->freehigh <<= bitcount;
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out:
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return 0;
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}
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SYSCALL_DEFINE1(sysinfo, struct sysinfo __user *, info)
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{
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struct sysinfo val;
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do_sysinfo(&val);
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if (copy_to_user(info, &val, sizeof(struct sysinfo)))
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return -EFAULT;
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return 0;
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}
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#ifdef CONFIG_COMPAT
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struct compat_sysinfo {
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s32 uptime;
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u32 loads[3];
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u32 totalram;
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u32 freeram;
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u32 sharedram;
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u32 bufferram;
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u32 totalswap;
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u32 freeswap;
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u16 procs;
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u16 pad;
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u32 totalhigh;
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u32 freehigh;
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u32 mem_unit;
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char _f[20-2*sizeof(u32)-sizeof(int)];
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};
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COMPAT_SYSCALL_DEFINE1(sysinfo, struct compat_sysinfo __user *, info)
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{
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struct sysinfo s;
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do_sysinfo(&s);
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/* Check to see if any memory value is too large for 32-bit and scale
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* down if needed
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*/
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if ((s.totalram >> 32) || (s.totalswap >> 32)) {
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int bitcount = 0;
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while (s.mem_unit < PAGE_SIZE) {
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s.mem_unit <<= 1;
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bitcount++;
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}
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s.totalram >>= bitcount;
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s.freeram >>= bitcount;
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s.sharedram >>= bitcount;
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s.bufferram >>= bitcount;
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s.totalswap >>= bitcount;
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s.freeswap >>= bitcount;
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s.totalhigh >>= bitcount;
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s.freehigh >>= bitcount;
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}
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if (!access_ok(VERIFY_WRITE, info, sizeof(struct compat_sysinfo)) ||
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__put_user(s.uptime, &info->uptime) ||
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__put_user(s.loads[0], &info->loads[0]) ||
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__put_user(s.loads[1], &info->loads[1]) ||
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__put_user(s.loads[2], &info->loads[2]) ||
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__put_user(s.totalram, &info->totalram) ||
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__put_user(s.freeram, &info->freeram) ||
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__put_user(s.sharedram, &info->sharedram) ||
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__put_user(s.bufferram, &info->bufferram) ||
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__put_user(s.totalswap, &info->totalswap) ||
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__put_user(s.freeswap, &info->freeswap) ||
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__put_user(s.procs, &info->procs) ||
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__put_user(s.totalhigh, &info->totalhigh) ||
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__put_user(s.freehigh, &info->freehigh) ||
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__put_user(s.mem_unit, &info->mem_unit))
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return -EFAULT;
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return 0;
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}
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#endif /* CONFIG_COMPAT */
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208
kernel/timer.c
208
kernel/timer.c
@ -1,7 +1,7 @@
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/*
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* linux/kernel/timer.c
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*
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* Kernel internal timers, basic process system calls
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* Kernel internal timers
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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*
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@ -1396,61 +1396,6 @@ SYSCALL_DEFINE1(alarm, unsigned int, seconds)
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#endif
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/**
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* sys_getpid - return the thread group id of the current process
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*
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* Note, despite the name, this returns the tgid not the pid. The tgid and
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* the pid are identical unless CLONE_THREAD was specified on clone() in
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* which case the tgid is the same in all threads of the same group.
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*
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* This is SMP safe as current->tgid does not change.
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*/
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SYSCALL_DEFINE0(getpid)
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{
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return task_tgid_vnr(current);
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}
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/*
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* Accessing ->real_parent is not SMP-safe, it could
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* change from under us. However, we can use a stale
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* value of ->real_parent under rcu_read_lock(), see
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* release_task()->call_rcu(delayed_put_task_struct).
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*/
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SYSCALL_DEFINE0(getppid)
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{
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int pid;
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rcu_read_lock();
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pid = task_tgid_vnr(rcu_dereference(current->real_parent));
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rcu_read_unlock();
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return pid;
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}
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SYSCALL_DEFINE0(getuid)
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{
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/* Only we change this so SMP safe */
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return from_kuid_munged(current_user_ns(), current_uid());
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}
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SYSCALL_DEFINE0(geteuid)
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{
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/* Only we change this so SMP safe */
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return from_kuid_munged(current_user_ns(), current_euid());
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}
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SYSCALL_DEFINE0(getgid)
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{
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/* Only we change this so SMP safe */
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return from_kgid_munged(current_user_ns(), current_gid());
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}
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SYSCALL_DEFINE0(getegid)
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{
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/* Only we change this so SMP safe */
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return from_kgid_munged(current_user_ns(), current_egid());
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}
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static void process_timeout(unsigned long __data)
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{
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wake_up_process((struct task_struct *)__data);
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@ -1558,157 +1503,6 @@ signed long __sched schedule_timeout_uninterruptible(signed long timeout)
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}
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EXPORT_SYMBOL(schedule_timeout_uninterruptible);
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/* Thread ID - the internal kernel "pid" */
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SYSCALL_DEFINE0(gettid)
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{
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return task_pid_vnr(current);
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}
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/**
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* do_sysinfo - fill in sysinfo struct
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* @info: pointer to buffer to fill
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*/
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static int do_sysinfo(struct sysinfo *info)
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{
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unsigned long mem_total, sav_total;
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unsigned int mem_unit, bitcount;
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struct timespec tp;
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memset(info, 0, sizeof(struct sysinfo));
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ktime_get_ts(&tp);
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monotonic_to_bootbased(&tp);
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info->uptime = tp.tv_sec + (tp.tv_nsec ? 1 : 0);
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get_avenrun(info->loads, 0, SI_LOAD_SHIFT - FSHIFT);
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info->procs = nr_threads;
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si_meminfo(info);
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si_swapinfo(info);
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/*
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* If the sum of all the available memory (i.e. ram + swap)
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* is less than can be stored in a 32 bit unsigned long then
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* we can be binary compatible with 2.2.x kernels. If not,
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* well, in that case 2.2.x was broken anyways...
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*
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* -Erik Andersen <andersee@debian.org>
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*/
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mem_total = info->totalram + info->totalswap;
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if (mem_total < info->totalram || mem_total < info->totalswap)
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goto out;
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bitcount = 0;
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mem_unit = info->mem_unit;
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while (mem_unit > 1) {
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bitcount++;
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mem_unit >>= 1;
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sav_total = mem_total;
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mem_total <<= 1;
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if (mem_total < sav_total)
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goto out;
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}
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/*
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* If mem_total did not overflow, multiply all memory values by
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* info->mem_unit and set it to 1. This leaves things compatible
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* with 2.2.x, and also retains compatibility with earlier 2.4.x
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* kernels...
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*/
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info->mem_unit = 1;
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info->totalram <<= bitcount;
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info->freeram <<= bitcount;
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info->sharedram <<= bitcount;
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info->bufferram <<= bitcount;
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info->totalswap <<= bitcount;
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info->freeswap <<= bitcount;
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info->totalhigh <<= bitcount;
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info->freehigh <<= bitcount;
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out:
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return 0;
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}
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SYSCALL_DEFINE1(sysinfo, struct sysinfo __user *, info)
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{
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struct sysinfo val;
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do_sysinfo(&val);
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if (copy_to_user(info, &val, sizeof(struct sysinfo)))
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return -EFAULT;
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return 0;
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}
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#ifdef CONFIG_COMPAT
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struct compat_sysinfo {
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s32 uptime;
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u32 loads[3];
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u32 totalram;
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u32 freeram;
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u32 sharedram;
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u32 bufferram;
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u32 totalswap;
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u32 freeswap;
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u16 procs;
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u16 pad;
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u32 totalhigh;
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u32 freehigh;
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u32 mem_unit;
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char _f[20-2*sizeof(u32)-sizeof(int)];
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};
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COMPAT_SYSCALL_DEFINE1(sysinfo, struct compat_sysinfo __user *, info)
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{
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struct sysinfo s;
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do_sysinfo(&s);
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/* Check to see if any memory value is too large for 32-bit and scale
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* down if needed
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*/
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if ((s.totalram >> 32) || (s.totalswap >> 32)) {
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int bitcount = 0;
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while (s.mem_unit < PAGE_SIZE) {
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s.mem_unit <<= 1;
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bitcount++;
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}
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s.totalram >>= bitcount;
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s.freeram >>= bitcount;
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s.sharedram >>= bitcount;
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s.bufferram >>= bitcount;
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s.totalswap >>= bitcount;
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s.freeswap >>= bitcount;
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s.totalhigh >>= bitcount;
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s.freehigh >>= bitcount;
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}
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if (!access_ok(VERIFY_WRITE, info, sizeof(struct compat_sysinfo)) ||
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__put_user (s.uptime, &info->uptime) ||
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__put_user (s.loads[0], &info->loads[0]) ||
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__put_user (s.loads[1], &info->loads[1]) ||
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__put_user (s.loads[2], &info->loads[2]) ||
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__put_user (s.totalram, &info->totalram) ||
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__put_user (s.freeram, &info->freeram) ||
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__put_user (s.sharedram, &info->sharedram) ||
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__put_user (s.bufferram, &info->bufferram) ||
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__put_user (s.totalswap, &info->totalswap) ||
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__put_user (s.freeswap, &info->freeswap) ||
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__put_user (s.procs, &info->procs) ||
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__put_user (s.totalhigh, &info->totalhigh) ||
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__put_user (s.freehigh, &info->freehigh) ||
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__put_user (s.mem_unit, &info->mem_unit))
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return -EFAULT;
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return 0;
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}
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#endif /* CONFIG_COMPAT */
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static int __cpuinit init_timers_cpu(int cpu)
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{
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int j;
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