Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff
[linux-2.6.git] / fs / proc / array.c
index bf42e97..dc4d1d0 100644 (file)
@@ -73,7 +73,8 @@
 #include <linux/highmem.h>
 #include <linux/file.h>
 #include <linux/times.h>
-#include <linux/vs_base.h>
+#include <linux/cpuset.h>
+#include <linux/rcupdate.h>
 #include <linux/vs_context.h>
 #include <linux/vs_network.h>
 #include <linux/vs_cvirt.h>
@@ -82,6 +83,7 @@
 #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) \
@@ -92,10 +94,13 @@ 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 = p->comm;
-       i = sizeof(p->comm);
+       name = tcomm;
+       i = sizeof(tcomm);
        do {
                unsigned char c = *name;
                name++;
@@ -131,19 +136,23 @@ static const char *task_state_array[] = {
        "S (sleeping)",         /*  1 */
        "D (disk sleep)",       /*  2 */
        "T (stopped)",          /*  4 */
-       "Z (zombie)",           /*  8 */
-       "X (dead)",             /* 16 */
-       "H (on hold)"           /* 32 */
+       "T (tracing stop)",     /*  8 */
+       "Z (zombie)",           /* 16 */
+       "X (dead)",             /* 32 */
+       "N (noninteractive)",   /* 64 */
+       "H (on hold)"           /* 128 */
 };
 
 static inline const char * get_task_state(struct task_struct *tsk)
 {
-       unsigned int state = tsk->state & (TASK_RUNNING |
-                                          TASK_INTERRUPTIBLE |
-                                          TASK_UNINTERRUPTIBLE |
-                                          TASK_ZOMBIE |
-                                          TASK_STOPPED |
-                                          TASK_ONHOLD);
+       unsigned int state = (tsk->state & (TASK_RUNNING |
+                                           TASK_INTERRUPTIBLE |
+                                           TASK_UNINTERRUPTIBLE |
+                                           TASK_STOPPED |
+                                          TASK_TRACED |
+                                          TASK_ONHOLD)) |
+                       (tsk->exit_state & (EXIT_ZOMBIE |
+                                           EXIT_DEAD));
        const char **p = &task_state_array[0];
 
        while (state) {
@@ -157,10 +166,14 @@ static inline char * task_state(struct task_struct *p, char *buffer)
 {
        struct group_info *group_info;
        int g;
-       pid_t ppid;
+       struct fdtable *fdt = NULL;
+       pid_t pid, ptgid, tppid, tgid;
 
        read_lock(&tasklist_lock);
-       ppid = vx_map_tgid(current->vx_info, p->real_parent->pid);
+       tgid = vx_map_tgid(p->tgid);
+       pid = vx_map_pid(p->pid);
+       ptgid = vx_map_pid(p->group_leader->real_parent->tgid);
+       tppid = vx_map_pid(p->parent->pid);
        buffer += sprintf(buffer,
                "State:\t%s\n"
                "SleepAVG:\t%lu%%\n"
@@ -172,17 +185,20 @@ static inline char * task_state(struct task_struct *p, char *buffer)
                "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, p->pid ? ppid : 0,
-               p->pid && p->ptrace ? p->parent->pid : 0,
+               tgid, pid, (pid > 1) ? ptgid : 0,
+               pid_alive(p) && p->ptrace ? tppid : 0,
                p->uid, p->euid, p->suid, p->fsuid,
                p->gid, p->egid, p->sgid, p->fsgid);
        read_unlock(&tasklist_lock);
        task_lock(p);
+       rcu_read_lock();
+       if (p->files)
+               fdt = files_fdtable(p->files);
        buffer += sprintf(buffer,
                "FDSize:\t%d\n"
                "Groups:\t",
-               p->files ? p->files->max_fds : 0);
+               fdt ? fdt->max_fds : 0);
+       rcu_read_unlock();
 
        group_info = p->group_info;
        get_group_info(group_info);
@@ -240,6 +256,8 @@ 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);
@@ -256,11 +274,14 @@ static inline char * task_sig(struct task_struct *p, char *buffer)
                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);
@@ -282,12 +303,13 @@ static inline char *task_cap(struct task_struct *p, char *buffer)
                            cap_t(p->cap_effective));
 }
 
-extern char *task_mem(struct mm_struct *, char *);
 int proc_pid_status(struct task_struct *task, char * buffer)
 {
        char * orig = buffer;
-#ifdef CONFIG_VSERVER_LEGACY           
+#ifdef CONFIG_VSERVER_LEGACY
        struct vx_info *vxi;
+#endif
+#ifdef CONFIG_VSERVER_LEGACYNET
        struct nx_info *nxi;
 #endif
        struct mm_struct *mm = get_task_mm(task);
@@ -301,8 +323,11 @@ int proc_pid_status(struct task_struct *task, char * buffer)
        }
        buffer = task_sig(task, buffer);
        buffer = task_cap(task, buffer);
+       buffer = cpuset_task_status_allowed(task, buffer);
 
-#ifdef CONFIG_VSERVER_LEGACY           
+       if (task_vx_flags(task, VXF_INFO_HIDE, 0))
+               goto skip;
+#ifdef CONFIG_VSERVER_LEGACY
        buffer += sprintf (buffer,"s_context: %d\n", vx_task_xid(task));
        vxi = task_get_vx_info(task);
        if (vxi) {
@@ -315,6 +340,10 @@ int proc_pid_status(struct task_struct *task, char * buffer)
                buffer += sprintf (buffer,"initpid: none\n");
        }
        put_vx_info(vxi);
+#else
+       buffer += sprintf (buffer,"VxID: %d\n", vx_task_xid(task));
+#endif
+#ifdef CONFIG_VSERVER_LEGACYNET
        nxi = task_get_nx_info(task);
        if (nxi) {
                int i;
@@ -334,60 +363,64 @@ int proc_pid_status(struct task_struct *task, char * buffer)
        }
        put_nx_info(nxi);
 #endif
-#if defined(CONFIG_ARCH_S390)
+skip:
+#if defined(CONFIG_S390)
        buffer = task_show_regs(task, buffer);
 #endif
        return buffer - orig;
 }
 
-extern unsigned long task_vsize(struct mm_struct *);
-int proc_pid_stat(struct task_struct *task, char * buffer)
+static int do_task_stat(struct task_struct *task, char * buffer, int whole)
 {
-       unsigned long vsize, eip, esp, wchan;
+       unsigned long vsize, eip, esp, wchan = ~0UL;
        long priority, nice;
-       unsigned long long bias_jiffies;
        int tty_pgrp = -1, tty_nr = 0;
        sigset_t sigign, sigcatch;
        char state;
        int res;
-       pid_t ppid, pgid = -1, sid = -1;
+       pid_t pid, 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;
+       struct task_struct *t;
+       char tcomm[sizeof(task->comm)];
 
        state = *get_task_state(task);
        vsize = eip = esp = 0;
-       bias_jiffies = INITIAL_JIFFIES;
-
-       task_lock(task);
-       if (__vx_task_flags(task, VXF_VIRT_UPTIME, 0)) {
-               bias_jiffies = task->vx_info->cvirt.bias_jiffies;
-               /* hmm, do we need that? */
-               if (bias_jiffies > task->start_time)
-                       bias_jiffies = task->start_time;
-       }
-
-       mm = task->mm;
-       if(mm)
-               mm = mmgrab(mm);
-       task_unlock(task);
+       mm = get_task_mm(task);
        if (mm) {
-               down_read(&mm->mmap_sem);
                vsize = task_vsize(mm);
                eip = KSTK_EIP(task);
                esp = KSTK_ESP(task);
-               up_read(&mm->mmap_sem);
        }
 
-       wchan = get_wchan(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) {
@@ -397,26 +430,66 @@ int proc_pid_stat(struct task_struct *task, char * buffer)
                }
                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);
+               }
        }
+       pid = vx_info_map_pid(task->vx_info, pid_alive(task) ? task->pid : 0);
+       ppid = (!(pid > 1)) ? 0 : vx_info_map_tgid(task->vx_info,
+               task->group_leader->real_parent->tgid);
+       pgid = vx_info_map_pid(task->vx_info, pgid);
+
        read_unlock(&tasklist_lock);
 
+       if (!whole || num_threads<2) {
+               wchan = 0;
+               if (current->uid == task->uid || current->euid == task->uid ||
+                               capable(CAP_SYS_NICE))
+                       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);
 
-       read_lock(&tasklist_lock);
-       ppid = task->pid ? task->real_parent->pid : 0;
-       read_unlock(&tasklist_lock);
-
        /* Temporary variable needed for gcc-2.96 */
-       start_time = jiffies_64_to_clock_t(task->start_time - bias_jiffies);
+       /* 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);
+
+       /* fixup start time for virt uptime */
+       if (vx_flags(VXF_VIRT_UPTIME, 0)) {
+               unsigned long long bias =
+                       current->vx_info->cvirt.bias_clock;
+
+               if (start_time > bias)
+                       start_time -= bias;
+               else
+                       start_time = 0;
+       }
 
        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 %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
 %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu\n",
-               task->pid,
-               task->comm,
+               pid,
+               tcomm,
                state,
                ppid,
                pgid,
@@ -424,22 +497,21 @@ int proc_pid_stat(struct task_struct *task, char * buffer)
                tty_nr,
                tty_pgrp,
                task->flags,
-               task->min_flt,
-               task->cmin_flt,
-               task->maj_flt,
-               task->cmaj_flt,
-               jiffies_to_clock_t(task->utime),
-               jiffies_to_clock_t(task->stime),
-               jiffies_to_clock_t(task->cutime),
-               jiffies_to_clock_t(task->cstime),
+               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(task->it_real_value),
                start_time,
                vsize,
-               mm ? mm->rss : 0, /* you might want to shift this left 3 */
-               task->rlim[RLIMIT_RSS].rlim_cur,
+               mm ? get_mm_rss(mm) : 0,
+               rsslim,
                mm ? mm->start_code : 0,
                mm ? mm->end_code : 0,
                mm ? mm->start_stack : 0,
@@ -465,17 +537,23 @@ int proc_pid_stat(struct task_struct *task, char * buffer)
        return res;
 }
 
-extern int task_statm(struct mm_struct *, int *, int *, int *, int *);
+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) {
-               down_read(&mm->mmap_sem);
                size = task_statm(mm, &shared, &text, &data, &resident);
-               up_read(&mm->mmap_sem);
-
                mmput(mm);
        }