1 files changed, 484 insertions, 0 deletions

diff --git a/fs/proc/array.c b/fs/proc/array.c
new file mode 100644
index 000000000000..37668fe998ad
--- /dev/null
+++ b/fs/proc/array.c
@@ -0,0 +1,484 @@
+/*
+ *  linux/fs/proc/array.c
+ *
+ *  Copyright (C) 1992  by Linus Torvalds
+ *  based on ideas by Darren Senn
+ *
+ * Fixes:
+ * Michael. K. Johnson: stat,statm extensions.
+ *                      <johnsonm@stolaf.edu>
+ *
+ * Pauline Middelink :  Made cmdline,envline only break at '\0's, to
+ *                      make sure SET_PROCTITLE works. Also removed
+ *                      bad '!' which forced address recalculation for
+ *                      EVERY character on the current page.
+ *                      <middelin@polyware.iaf.nl>
+ *
+ * Danny ter Haar    :  added cpuinfo
+ *                      <dth@cistron.nl>
+ *
+ * Alessandro Rubini :  profile extension.
+ *                      <rubini@ipvvis.unipv.it>
+ *
+ * Jeff Tranter      :  added BogoMips field to cpuinfo
+ *                      <Jeff_Tranter@Mitel.COM>
+ *
+ * Bruno Haible      :  remove 4K limit for the maps file
+ *                      <haible@ma2s2.mathematik.uni-karlsruhe.de>
+ *
+ * Yves Arrouye      :  remove removal of trailing spaces in get_array.
+ *                      <Yves.Arrouye@marin.fdn.fr>
+ *
+ * Jerome Forissier  :  added per-CPU time information to /proc/stat
+ *                      and /proc/<pid>/cpu extension
+ *                      <forissier@isia.cma.fr>
+ *                      - Incorporation and non-SMP safe operation
+ *                      of forissier patch in 2.1.78 by
+ *                      Hans Marcus <crowbar@concepts.nl>
+ *
+ * aeb@cwi.nl        :  /proc/partitions
+ *
+ *
+ * Alan Cox          :  security fixes.
+ *                      <Alan.Cox@linux.org>
+ *
+ * Al Viro           :  safe handling of mm_struct
+ *
+ * Gerhard Wichert   :  added BIGMEM support
+ * Siemens AG           <Gerhard.Wichert@pdb.siemens.de>
+ *
+ * Al Viro & Jeff Garzik :  moved most of the thing into base.c and
+ *                       :  proc_misc.c. The rest may eventually go into
+ *                       :  base.c too.
+ */
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/kernel.h>
+#include <linux/kernel_stat.h>
+#include <linux/tty.h>
+#include <linux/string.h>
+#include <linux/mman.h>
+#include <linux/proc_fs.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/hugetlb.h>
+#include <linux/pagemap.h>
+#include <linux/swap.h>
+#include <linux/slab.h>
+#include <linux/smp.h>
+#include <linux/signal.h>
+#include <linux/highmem.h>
+#include <linux/file.h>
+#include <linux/times.h>
+#include <linux/cpuset.h>
+
+#include <asm/uaccess.h>
+#include <asm/pgtable.h>
+#include <asm/io.h>
+#include <asm/processor.h>
+#include "internal.h"
+
+/* Gcc optimizes away "strlen(x)" for constant x */
+#define ADDBUF(buffer, string) \
+do { memcpy(buffer, string, strlen(string)); \
+     buffer += strlen(string); } while (0)
+
+static inline char * task_name(struct task_struct *p, char * buf)
+{
+        int i;
+        char * name;
+        char tcomm[sizeof(p->comm)];
+
+        get_task_comm(tcomm, p);
+
+        ADDBUF(buf, "Name:\t");
+        name = tcomm;
+        i = sizeof(tcomm);
+        do {
+                unsigned char c = *name;
+                name++;
+                i--;
+                *buf = c;
+                if (!c)
+                        break;
+                if (c == '\\') {
+                        buf[1] = c;
+                        buf += 2;
+                        continue;
+                }
+                if (c == '\n') {
+                        buf[0] = '\\';
+                        buf[1] = 'n';
+                        buf += 2;
+                        continue;
+                }
+                buf++;
+        } while (i);
+        *buf = '\n';
+        return buf+1;
+}
+
+/*
+ * The task state array is a strange "bitmap" of
+ * reasons to sleep. Thus "running" is zero, and
+ * you can test for combinations of others with
+ * simple bit tests.
+ */
+static const char *task_state_array[] = {
+        "R (running)",          /*  0 */
+        "S (sleeping)",         /*  1 */
+        "D (disk sleep)",       /*  2 */
+        "T (stopped)",          /*  4 */
+        "T (tracing stop)",     /*  8 */
+        "Z (zombie)",           /* 16 */
+        "X (dead)"              /* 32 */
+};
+
+static inline const char * get_task_state(struct task_struct *tsk)
+{
+        unsigned int state = (tsk->state & (TASK_RUNNING |
+                                            TASK_INTERRUPTIBLE |
+                                            TASK_UNINTERRUPTIBLE |
+                                            TASK_STOPPED |
+                                            TASK_TRACED)) |
+                        (tsk->exit_state & (EXIT_ZOMBIE |
+                                            EXIT_DEAD));
+        const char **p = &task_state_array[0];
+
+        while (state) {
+                p++;
+                state >>= 1;
+        }
+        return *p;
+}
+
+static inline char * task_state(struct task_struct *p, char *buffer)
+{
+        struct group_info *group_info;
+        int g;
+
+        read_lock(&tasklist_lock);
+        buffer += sprintf(buffer,
+                "State:\t%s\n"
+                "SleepAVG:\t%lu%%\n"
+                "Tgid:\t%d\n"
+                "Pid:\t%d\n"
+                "PPid:\t%d\n"
+                "TracerPid:\t%d\n"
+                "Uid:\t%d\t%d\t%d\t%d\n"
+                "Gid:\t%d\t%d\t%d\t%d\n",
+                get_task_state(p),
+                (p->sleep_avg/1024)*100/(1020000000/1024),
+                p->tgid,
+                p->pid, pid_alive(p) ? p->group_leader->real_parent->tgid : 0,
+                pid_alive(p) && p->ptrace ? p->parent->pid : 0,
+                p->uid, p->euid, p->suid, p->fsuid,
+                p->gid, p->egid, p->sgid, p->fsgid);
+        read_unlock(&tasklist_lock);
+        task_lock(p);
+        buffer += sprintf(buffer,
+                "FDSize:\t%d\n"
+                "Groups:\t",
+                p->files ? p->files->max_fds : 0);
+
+        group_info = p->group_info;
+        get_group_info(group_info);
+        task_unlock(p);
+
+        for (g = 0; g < min(group_info->ngroups,NGROUPS_SMALL); g++)
+                buffer += sprintf(buffer, "%d ", GROUP_AT(group_info,g));
+        put_group_info(group_info);
+
+        buffer += sprintf(buffer, "\n");
+        return buffer;
+}
+
+static char * render_sigset_t(const char *header, sigset_t *set, char *buffer)
+{
+        int i, len;
+
+        len = strlen(header);
+        memcpy(buffer, header, len);
+        buffer += len;
+
+        i = _NSIG;
+        do {
+                int x = 0;
+
+                i -= 4;
+                if (sigismember(set, i+1)) x |= 1;
+                if (sigismember(set, i+2)) x |= 2;
+                if (sigismember(set, i+3)) x |= 4;
+                if (sigismember(set, i+4)) x |= 8;
+                *buffer++ = (x < 10 ? '0' : 'a' - 10) + x;
+        } while (i >= 4);
+
+        *buffer++ = '\n';
+        *buffer = 0;
+        return buffer;
+}
+
+static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
+                                    sigset_t *catch)
+{
+        struct k_sigaction *k;
+        int i;
+
+        k = p->sighand->action;
+        for (i = 1; i <= _NSIG; ++i, ++k) {
+                if (k->sa.sa_handler == SIG_IGN)
+                        sigaddset(ign, i);
+                else if (k->sa.sa_handler != SIG_DFL)
+                        sigaddset(catch, i);
+        }
+}
+
+static inline char * task_sig(struct task_struct *p, char *buffer)
+{
+        sigset_t pending, shpending, blocked, ignored, caught;
+        int num_threads = 0;
+        unsigned long qsize = 0;
+        unsigned long qlim = 0;
+
+        sigemptyset(&pending);
+        sigemptyset(&shpending);
+        sigemptyset(&blocked);
+        sigemptyset(&ignored);
+        sigemptyset(&caught);
+
+        /* Gather all the data with the appropriate locks held */
+        read_lock(&tasklist_lock);
+        if (p->sighand) {
+                spin_lock_irq(&p->sighand->siglock);
+                pending = p->pending.signal;
+                shpending = p->signal->shared_pending.signal;
+                blocked = p->blocked;
+                collect_sigign_sigcatch(p, &ignored, &caught);
+                num_threads = atomic_read(&p->signal->count);
+                qsize = atomic_read(&p->user->sigpending);
+                qlim = p->signal->rlim[RLIMIT_SIGPENDING].rlim_cur;
+                spin_unlock_irq(&p->sighand->siglock);
+        }
+        read_unlock(&tasklist_lock);
+
+        buffer += sprintf(buffer, "Threads:\t%d\n", num_threads);
+        buffer += sprintf(buffer, "SigQ:\t%lu/%lu\n", qsize, qlim);
+
+        /* render them all */
+        buffer = render_sigset_t("SigPnd:\t", &pending, buffer);
+        buffer = render_sigset_t("ShdPnd:\t", &shpending, buffer);
+        buffer = render_sigset_t("SigBlk:\t", &blocked, buffer);
+        buffer = render_sigset_t("SigIgn:\t", &ignored, buffer);
+        buffer = render_sigset_t("SigCgt:\t", &caught, buffer);
+
+        return buffer;
+}
+
+static inline char *task_cap(struct task_struct *p, char *buffer)
+{
+    return buffer + sprintf(buffer, "CapInh:\t%016x\n"
+                            "CapPrm:\t%016x\n"
+                            "CapEff:\t%016x\n",
+                            cap_t(p->cap_inheritable),
+                            cap_t(p->cap_permitted),
+                            cap_t(p->cap_effective));
+}
+
+int proc_pid_status(struct task_struct *task, char * buffer)
+{
+        char * orig = buffer;
+        struct mm_struct *mm = get_task_mm(task);
+
+        buffer = task_name(task, buffer);
+        buffer = task_state(task, buffer);
+ 
+        if (mm) {
+                buffer = task_mem(mm, buffer);
+                mmput(mm);
+        }
+        buffer = task_sig(task, buffer);
+        buffer = task_cap(task, buffer);
+        buffer = cpuset_task_status_allowed(task, buffer);
+#if defined(CONFIG_ARCH_S390)
+        buffer = task_show_regs(task, buffer);
+#endif
+        return buffer - orig;
+}
+
+static int do_task_stat(struct task_struct *task, char * buffer, int whole)
+{
+        unsigned long vsize, eip, esp, wchan = ~0UL;
+        long priority, nice;
+        int tty_pgrp = -1, tty_nr = 0;
+        sigset_t sigign, sigcatch;
+        char state;
+        int res;
+        pid_t ppid, pgid = -1, sid = -1;
+        int num_threads = 0;
+        struct mm_struct *mm;
+        unsigned long long start_time;
+        unsigned long cmin_flt = 0, cmaj_flt = 0;
+        unsigned long  min_flt = 0,  maj_flt = 0;
+        cputime_t cutime, cstime, utime, stime;
+        unsigned long rsslim = 0;
+        unsigned long it_real_value = 0;
+        struct task_struct *t;
+        char tcomm[sizeof(task->comm)];
+
+        state = *get_task_state(task);
+        vsize = eip = esp = 0;
+        mm = get_task_mm(task);
+        if (mm) {
+                vsize = task_vsize(mm);
+                eip = KSTK_EIP(task);
+                esp = KSTK_ESP(task);
+        }
+
+        get_task_comm(tcomm, task);
+
+        sigemptyset(&sigign);
+        sigemptyset(&sigcatch);
+        cutime = cstime = utime = stime = cputime_zero;
+        read_lock(&tasklist_lock);
+        if (task->sighand) {
+                spin_lock_irq(&task->sighand->siglock);
+                num_threads = atomic_read(&task->signal->count);
+                collect_sigign_sigcatch(task, &sigign, &sigcatch);
+
+                /* add up live thread stats at the group level */
+                if (whole) {
+                        t = task;
+                        do {
+                                min_flt += t->min_flt;
+                                maj_flt += t->maj_flt;
+                                utime = cputime_add(utime, t->utime);
+                                stime = cputime_add(stime, t->stime);
+                                t = next_thread(t);
+                        } while (t != task);
+                }
+
+                spin_unlock_irq(&task->sighand->siglock);
+        }
+        if (task->signal) {
+                if (task->signal->tty) {
+                        tty_pgrp = task->signal->tty->pgrp;
+                        tty_nr = new_encode_dev(tty_devnum(task->signal->tty));
+                }
+                pgid = process_group(task);
+                sid = task->signal->session;
+                cmin_flt = task->signal->cmin_flt;
+                cmaj_flt = task->signal->cmaj_flt;
+                cutime = task->signal->cutime;
+                cstime = task->signal->cstime;
+                rsslim = task->signal->rlim[RLIMIT_RSS].rlim_cur;
+                if (whole) {
+                        min_flt += task->signal->min_flt;
+                        maj_flt += task->signal->maj_flt;
+                        utime = cputime_add(utime, task->signal->utime);
+                        stime = cputime_add(stime, task->signal->stime);
+                }
+                it_real_value = task->signal->it_real_value;
+        }
+        ppid = pid_alive(task) ? task->group_leader->real_parent->tgid : 0;
+        read_unlock(&tasklist_lock);
+
+        if (!whole || num_threads<2)
+                wchan = get_wchan(task);
+        if (!whole) {
+                min_flt = task->min_flt;
+                maj_flt = task->maj_flt;
+                utime = task->utime;
+                stime = task->stime;
+        }
+
+        /* scale priority and nice values from timeslices to -20..20 */
+        /* to make it look like a "normal" Unix priority/nice value  */
+        priority = task_prio(task);
+        nice = task_nice(task);
+
+        /* Temporary variable needed for gcc-2.96 */
+        /* convert timespec -> nsec*/
+        start_time = (unsigned long long)task->start_time.tv_sec * NSEC_PER_SEC
+                                + task->start_time.tv_nsec;
+        /* convert nsec -> ticks */
+        start_time = nsec_to_clock_t(start_time);
+
+        res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
+%lu %lu %lu %lu %lu %ld %ld %ld %ld %d %ld %llu %lu %ld %lu %lu %lu %lu %lu \
+%lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu\n",
+                task->pid,
+                tcomm,
+                state,
+                ppid,
+                pgid,
+                sid,
+                tty_nr,
+                tty_pgrp,
+                task->flags,
+                min_flt,
+                cmin_flt,
+                maj_flt,
+                cmaj_flt,
+                cputime_to_clock_t(utime),
+                cputime_to_clock_t(stime),
+                cputime_to_clock_t(cutime),
+                cputime_to_clock_t(cstime),
+                priority,
+                nice,
+                num_threads,
+                jiffies_to_clock_t(it_real_value),
+                start_time,
+                vsize,
+                mm ? get_mm_counter(mm, rss) : 0, /* you might want to shift this left 3 */
+                rsslim,
+                mm ? mm->start_code : 0,
+                mm ? mm->end_code : 0,
+                mm ? mm->start_stack : 0,
+                esp,
+                eip,
+                /* The signal information here is obsolete.
+                 * It must be decimal for Linux 2.0 compatibility.
+                 * Use /proc/#/status for real-time signals.
+                 */
+                task->pending.signal.sig[0] & 0x7fffffffUL,
+                task->blocked.sig[0] & 0x7fffffffUL,
+                sigign      .sig[0] & 0x7fffffffUL,
+                sigcatch    .sig[0] & 0x7fffffffUL,
+                wchan,
+                0UL,
+                0UL,
+                task->exit_signal,
+                task_cpu(task),
+                task->rt_priority,
+                task->policy);
+        if(mm)
+                mmput(mm);
+        return res;
+}
+
+int proc_tid_stat(struct task_struct *task, char * buffer)
+{
+        return do_task_stat(task, buffer, 0);
+}
+
+int proc_tgid_stat(struct task_struct *task, char * buffer)
+{
+        return do_task_stat(task, buffer, 1);
+}
+
+int proc_pid_statm(struct task_struct *task, char *buffer)
+{
+        int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0;
+        struct mm_struct *mm = get_task_mm(task);
+        
+        if (mm) {
+                size = task_statm(mm, &shared, &text, &data, &resident);
+                mmput(mm);
+        }
+
+        return sprintf(buffer,"%d %d %d %d %d %d %d\n",
+                       size, resident, shared, text, lib, data, 0);
+}