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-rw-r--r--fs/proc/Makefile14
-rw-r--r--fs/proc/array.c484
-rw-r--r--fs/proc/base.c2056
-rw-r--r--fs/proc/generic.c705
-rw-r--r--fs/proc/inode-alloc.txt14
-rw-r--r--fs/proc/inode.c218
-rw-r--r--fs/proc/internal.h48
-rw-r--r--fs/proc/kcore.c404
-rw-r--r--fs/proc/kmsg.c55
-rw-r--r--fs/proc/mmu.c67
-rw-r--r--fs/proc/nommu.c135
-rw-r--r--fs/proc/proc_devtree.c165
-rw-r--r--fs/proc/proc_misc.c615
-rw-r--r--fs/proc/proc_tty.c242
-rw-r--r--fs/proc/root.c161
-rw-r--r--fs/proc/task_mmu.c235
-rw-r--r--fs/proc/task_nommu.c164
17 files changed, 5782 insertions, 0 deletions
diff --git a/fs/proc/Makefile b/fs/proc/Makefile
new file mode 100644
index 00000000000..738b9b60293
--- /dev/null
+++ b/fs/proc/Makefile
@@ -0,0 +1,14 @@
+#
+# Makefile for the Linux proc filesystem routines.
+#
+
+obj-$(CONFIG_PROC_FS) += proc.o
+
+proc-y := nommu.o task_nommu.o
+proc-$(CONFIG_MMU) := mmu.o task_mmu.o
+
+proc-y += inode.o root.o base.o generic.o array.o \
+ kmsg.o proc_tty.o proc_misc.o
+
+proc-$(CONFIG_PROC_KCORE) += kcore.o
+proc-$(CONFIG_PROC_DEVICETREE) += proc_devtree.o
diff --git a/fs/proc/array.c b/fs/proc/array.c
new file mode 100644
index 00000000000..37668fe998a
--- /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);
+}
diff --git a/fs/proc/base.c b/fs/proc/base.c
new file mode 100644
index 00000000000..dad8ea4e00a
--- /dev/null
+++ b/fs/proc/base.c
@@ -0,0 +1,2056 @@
+/*
+ * linux/fs/proc/base.c
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * proc base directory handling functions
+ *
+ * 1999, Al Viro. Rewritten. Now it covers the whole per-process part.
+ * Instead of using magical inumbers to determine the kind of object
+ * we allocate and fill in-core inodes upon lookup. They don't even
+ * go into icache. We cache the reference to task_struct upon lookup too.
+ * Eventually it should become a filesystem in its own. We don't use the
+ * rest of procfs anymore.
+ */
+
+#include <asm/uaccess.h>
+
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/init.h>
+#include <linux/file.h>
+#include <linux/string.h>
+#include <linux/seq_file.h>
+#include <linux/namei.h>
+#include <linux/namespace.h>
+#include <linux/mm.h>
+#include <linux/smp_lock.h>
+#include <linux/kallsyms.h>
+#include <linux/mount.h>
+#include <linux/security.h>
+#include <linux/ptrace.h>
+#include <linux/seccomp.h>
+#include <linux/cpuset.h>
+#include <linux/audit.h>
+#include "internal.h"
+
+/*
+ * For hysterical raisins we keep the same inumbers as in the old procfs.
+ * Feel free to change the macro below - just keep the range distinct from
+ * inumbers of the rest of procfs (currently those are in 0x0000--0xffff).
+ * As soon as we'll get a separate superblock we will be able to forget
+ * about magical ranges too.
+ */
+
+#define fake_ino(pid,ino) (((pid)<<16)|(ino))
+
+enum pid_directory_inos {
+ PROC_TGID_INO = 2,
+ PROC_TGID_TASK,
+ PROC_TGID_STATUS,
+ PROC_TGID_MEM,
+#ifdef CONFIG_SECCOMP
+ PROC_TGID_SECCOMP,
+#endif
+ PROC_TGID_CWD,
+ PROC_TGID_ROOT,
+ PROC_TGID_EXE,
+ PROC_TGID_FD,
+ PROC_TGID_ENVIRON,
+ PROC_TGID_AUXV,
+ PROC_TGID_CMDLINE,
+ PROC_TGID_STAT,
+ PROC_TGID_STATM,
+ PROC_TGID_MAPS,
+ PROC_TGID_MOUNTS,
+ PROC_TGID_WCHAN,
+#ifdef CONFIG_SCHEDSTATS
+ PROC_TGID_SCHEDSTAT,
+#endif
+#ifdef CONFIG_CPUSETS
+ PROC_TGID_CPUSET,
+#endif
+#ifdef CONFIG_SECURITY
+ PROC_TGID_ATTR,
+ PROC_TGID_ATTR_CURRENT,
+ PROC_TGID_ATTR_PREV,
+ PROC_TGID_ATTR_EXEC,
+ PROC_TGID_ATTR_FSCREATE,
+#endif
+#ifdef CONFIG_AUDITSYSCALL
+ PROC_TGID_LOGINUID,
+#endif
+ PROC_TGID_FD_DIR,
+ PROC_TGID_OOM_SCORE,
+ PROC_TGID_OOM_ADJUST,
+ PROC_TID_INO,
+ PROC_TID_STATUS,
+ PROC_TID_MEM,
+#ifdef CONFIG_SECCOMP
+ PROC_TID_SECCOMP,
+#endif
+ PROC_TID_CWD,
+ PROC_TID_ROOT,
+ PROC_TID_EXE,
+ PROC_TID_FD,
+ PROC_TID_ENVIRON,
+ PROC_TID_AUXV,
+ PROC_TID_CMDLINE,
+ PROC_TID_STAT,
+ PROC_TID_STATM,
+ PROC_TID_MAPS,
+ PROC_TID_MOUNTS,
+ PROC_TID_WCHAN,
+#ifdef CONFIG_SCHEDSTATS
+ PROC_TID_SCHEDSTAT,
+#endif
+#ifdef CONFIG_CPUSETS
+ PROC_TID_CPUSET,
+#endif
+#ifdef CONFIG_SECURITY
+ PROC_TID_ATTR,
+ PROC_TID_ATTR_CURRENT,
+ PROC_TID_ATTR_PREV,
+ PROC_TID_ATTR_EXEC,
+ PROC_TID_ATTR_FSCREATE,
+#endif
+#ifdef CONFIG_AUDITSYSCALL
+ PROC_TID_LOGINUID,
+#endif
+ PROC_TID_FD_DIR = 0x8000, /* 0x8000-0xffff */
+ PROC_TID_OOM_SCORE,
+ PROC_TID_OOM_ADJUST,
+};
+
+struct pid_entry {
+ int type;
+ int len;
+ char *name;
+ mode_t mode;
+};
+
+#define E(type,name,mode) {(type),sizeof(name)-1,(name),(mode)}
+
+static struct pid_entry tgid_base_stuff[] = {
+ E(PROC_TGID_TASK, "task", S_IFDIR|S_IRUGO|S_IXUGO),
+ E(PROC_TGID_FD, "fd", S_IFDIR|S_IRUSR|S_IXUSR),
+ E(PROC_TGID_ENVIRON, "environ", S_IFREG|S_IRUSR),
+ E(PROC_TGID_AUXV, "auxv", S_IFREG|S_IRUSR),
+ E(PROC_TGID_STATUS, "status", S_IFREG|S_IRUGO),
+ E(PROC_TGID_CMDLINE, "cmdline", S_IFREG|S_IRUGO),
+ E(PROC_TGID_STAT, "stat", S_IFREG|S_IRUGO),
+ E(PROC_TGID_STATM, "statm", S_IFREG|S_IRUGO),
+ E(PROC_TGID_MAPS, "maps", S_IFREG|S_IRUGO),
+ E(PROC_TGID_MEM, "mem", S_IFREG|S_IRUSR|S_IWUSR),
+#ifdef CONFIG_SECCOMP
+ E(PROC_TGID_SECCOMP, "seccomp", S_IFREG|S_IRUSR|S_IWUSR),
+#endif
+ E(PROC_TGID_CWD, "cwd", S_IFLNK|S_IRWXUGO),
+ E(PROC_TGID_ROOT, "root", S_IFLNK|S_IRWXUGO),
+ E(PROC_TGID_EXE, "exe", S_IFLNK|S_IRWXUGO),
+ E(PROC_TGID_MOUNTS, "mounts", S_IFREG|S_IRUGO),
+#ifdef CONFIG_SECURITY
+ E(PROC_TGID_ATTR, "attr", S_IFDIR|S_IRUGO|S_IXUGO),
+#endif
+#ifdef CONFIG_KALLSYMS
+ E(PROC_TGID_WCHAN, "wchan", S_IFREG|S_IRUGO),
+#endif
+#ifdef CONFIG_SCHEDSTATS
+ E(PROC_TGID_SCHEDSTAT, "schedstat", S_IFREG|S_IRUGO),
+#endif
+#ifdef CONFIG_CPUSETS
+ E(PROC_TGID_CPUSET, "cpuset", S_IFREG|S_IRUGO),
+#endif
+ E(PROC_TGID_OOM_SCORE, "oom_score",S_IFREG|S_IRUGO),
+ E(PROC_TGID_OOM_ADJUST,"oom_adj", S_IFREG|S_IRUGO|S_IWUSR),
+#ifdef CONFIG_AUDITSYSCALL
+ E(PROC_TGID_LOGINUID, "loginuid", S_IFREG|S_IWUSR|S_IRUGO),
+#endif
+ {0,0,NULL,0}
+};
+static struct pid_entry tid_base_stuff[] = {
+ E(PROC_TID_FD, "fd", S_IFDIR|S_IRUSR|S_IXUSR),
+ E(PROC_TID_ENVIRON, "environ", S_IFREG|S_IRUSR),
+ E(PROC_TID_AUXV, "auxv", S_IFREG|S_IRUSR),
+ E(PROC_TID_STATUS, "status", S_IFREG|S_IRUGO),
+ E(PROC_TID_CMDLINE, "cmdline", S_IFREG|S_IRUGO),
+ E(PROC_TID_STAT, "stat", S_IFREG|S_IRUGO),
+ E(PROC_TID_STATM, "statm", S_IFREG|S_IRUGO),
+ E(PROC_TID_MAPS, "maps", S_IFREG|S_IRUGO),
+ E(PROC_TID_MEM, "mem", S_IFREG|S_IRUSR|S_IWUSR),
+#ifdef CONFIG_SECCOMP
+ E(PROC_TID_SECCOMP, "seccomp", S_IFREG|S_IRUSR|S_IWUSR),
+#endif
+ E(PROC_TID_CWD, "cwd", S_IFLNK|S_IRWXUGO),
+ E(PROC_TID_ROOT, "root", S_IFLNK|S_IRWXUGO),
+ E(PROC_TID_EXE, "exe", S_IFLNK|S_IRWXUGO),
+ E(PROC_TID_MOUNTS, "mounts", S_IFREG|S_IRUGO),
+#ifdef CONFIG_SECURITY
+ E(PROC_TID_ATTR, "attr", S_IFDIR|S_IRUGO|S_IXUGO),
+#endif
+#ifdef CONFIG_KALLSYMS
+ E(PROC_TID_WCHAN, "wchan", S_IFREG|S_IRUGO),
+#endif
+#ifdef CONFIG_SCHEDSTATS
+ E(PROC_TID_SCHEDSTAT, "schedstat",S_IFREG|S_IRUGO),
+#endif
+#ifdef CONFIG_CPUSETS
+ E(PROC_TID_CPUSET, "cpuset", S_IFREG|S_IRUGO),
+#endif
+ E(PROC_TID_OOM_SCORE, "oom_score",S_IFREG|S_IRUGO),
+ E(PROC_TID_OOM_ADJUST, "oom_adj", S_IFREG|S_IRUGO|S_IWUSR),
+#ifdef CONFIG_AUDITSYSCALL
+ E(PROC_TID_LOGINUID, "loginuid", S_IFREG|S_IWUSR|S_IRUGO),
+#endif
+ {0,0,NULL,0}
+};
+
+#ifdef CONFIG_SECURITY
+static struct pid_entry tgid_attr_stuff[] = {
+ E(PROC_TGID_ATTR_CURRENT, "current", S_IFREG|S_IRUGO|S_IWUGO),
+ E(PROC_TGID_ATTR_PREV, "prev", S_IFREG|S_IRUGO),
+ E(PROC_TGID_ATTR_EXEC, "exec", S_IFREG|S_IRUGO|S_IWUGO),
+ E(PROC_TGID_ATTR_FSCREATE, "fscreate", S_IFREG|S_IRUGO|S_IWUGO),
+ {0,0,NULL,0}
+};
+static struct pid_entry tid_attr_stuff[] = {
+ E(PROC_TID_ATTR_CURRENT, "current", S_IFREG|S_IRUGO|S_IWUGO),
+ E(PROC_TID_ATTR_PREV, "prev", S_IFREG|S_IRUGO),
+ E(PROC_TID_ATTR_EXEC, "exec", S_IFREG|S_IRUGO|S_IWUGO),
+ E(PROC_TID_ATTR_FSCREATE, "fscreate", S_IFREG|S_IRUGO|S_IWUGO),
+ {0,0,NULL,0}
+};
+#endif
+
+#undef E
+
+static int proc_fd_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt)
+{
+ struct task_struct *task = proc_task(inode);
+ struct files_struct *files;
+ struct file *file;
+ int fd = proc_type(inode) - PROC_TID_FD_DIR;
+
+ files = get_files_struct(task);
+ if (files) {
+ spin_lock(&files->file_lock);
+ file = fcheck_files(files, fd);
+ if (file) {
+ *mnt = mntget(file->f_vfsmnt);
+ *dentry = dget(file->f_dentry);
+ spin_unlock(&files->file_lock);
+ put_files_struct(files);
+ return 0;
+ }
+ spin_unlock(&files->file_lock);
+ put_files_struct(files);
+ }
+ return -ENOENT;
+}
+
+static int proc_cwd_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt)
+{
+ struct fs_struct *fs;
+ int result = -ENOENT;
+ task_lock(proc_task(inode));
+ fs = proc_task(inode)->fs;
+ if(fs)
+ atomic_inc(&fs->count);
+ task_unlock(proc_task(inode));
+ if (fs) {
+ read_lock(&fs->lock);
+ *mnt = mntget(fs->pwdmnt);
+ *dentry = dget(fs->pwd);
+ read_unlock(&fs->lock);
+ result = 0;
+ put_fs_struct(fs);
+ }
+ return result;
+}
+
+static int proc_root_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt)
+{
+ struct fs_struct *fs;
+ int result = -ENOENT;
+ task_lock(proc_task(inode));
+ fs = proc_task(inode)->fs;
+ if(fs)
+ atomic_inc(&fs->count);
+ task_unlock(proc_task(inode));
+ if (fs) {
+ read_lock(&fs->lock);
+ *mnt = mntget(fs->rootmnt);
+ *dentry = dget(fs->root);
+ read_unlock(&fs->lock);
+ result = 0;
+ put_fs_struct(fs);
+ }
+ return result;
+}
+
+#define MAY_PTRACE(task) \
+ (task == current || \
+ (task->parent == current && \
+ (task->ptrace & PT_PTRACED) && \
+ (task->state == TASK_STOPPED || task->state == TASK_TRACED) && \
+ security_ptrace(current,task) == 0))
+
+static int may_ptrace_attach(struct task_struct *task)
+{
+ int retval = 0;
+
+ task_lock(task);
+
+ if (!task->mm)
+ goto out;
+ if (((current->uid != task->euid) ||
+ (current->uid != task->suid) ||
+ (current->uid != task->uid) ||
+ (current->gid != task->egid) ||
+ (current->gid != task->sgid) ||
+ (current->gid != task->gid)) && !capable(CAP_SYS_PTRACE))
+ goto out;
+ rmb();
+ if (!task->mm->dumpable && !capable(CAP_SYS_PTRACE))
+ goto out;
+ if (security_ptrace(current, task))
+ goto out;
+
+ retval = 1;
+out:
+ task_unlock(task);
+ return retval;
+}
+
+static int proc_pid_environ(struct task_struct *task, char * buffer)
+{
+ int res = 0;
+ struct mm_struct *mm = get_task_mm(task);
+ if (mm) {
+ unsigned int len = mm->env_end - mm->env_start;
+ if (len > PAGE_SIZE)
+ len = PAGE_SIZE;
+ res = access_process_vm(task, mm->env_start, buffer, len, 0);
+ if (!may_ptrace_attach(task))
+ res = -ESRCH;
+ mmput(mm);
+ }
+ return res;
+}
+
+static int proc_pid_cmdline(struct task_struct *task, char * buffer)
+{
+ int res = 0;
+ unsigned int len;
+ struct mm_struct *mm = get_task_mm(task);
+ if (!mm)
+ goto out;
+ if (!mm->arg_end)
+ goto out_mm; /* Shh! No looking before we're done */
+
+ len = mm->arg_end - mm->arg_start;
+
+ if (len > PAGE_SIZE)
+ len = PAGE_SIZE;
+
+ res = access_process_vm(task, mm->arg_start, buffer, len, 0);
+
+ // If the nul at the end of args has been overwritten, then
+ // assume application is using setproctitle(3).
+ if (res > 0 && buffer[res-1] != '\0' && len < PAGE_SIZE) {
+ len = strnlen(buffer, res);
+ if (len < res) {
+ res = len;
+ } else {
+ len = mm->env_end - mm->env_start;
+ if (len > PAGE_SIZE - res)
+ len = PAGE_SIZE - res;
+ res += access_process_vm(task, mm->env_start, buffer+res, len, 0);
+ res = strnlen(buffer, res);
+ }
+ }
+out_mm:
+ mmput(mm);
+out:
+ return res;
+}
+
+static int proc_pid_auxv(struct task_struct *task, char *buffer)
+{
+ int res = 0;
+ struct mm_struct *mm = get_task_mm(task);
+ if (mm) {
+ unsigned int nwords = 0;
+ do
+ nwords += 2;
+ while (mm->saved_auxv[nwords - 2] != 0); /* AT_NULL */
+ res = nwords * sizeof(mm->saved_auxv[0]);
+ if (res > PAGE_SIZE)
+ res = PAGE_SIZE;
+ memcpy(buffer, mm->saved_auxv, res);
+ mmput(mm);
+ }
+ return res;
+}
+
+
+#ifdef CONFIG_KALLSYMS
+/*
+ * Provides a wchan file via kallsyms in a proper one-value-per-file format.
+ * Returns the resolved symbol. If that fails, simply return the address.
+ */
+static int proc_pid_wchan(struct task_struct *task, char *buffer)
+{
+ char *modname;
+ const char *sym_name;
+ unsigned long wchan, size, offset;
+ char namebuf[KSYM_NAME_LEN+1];
+
+ wchan = get_wchan(task);
+
+ sym_name = kallsyms_lookup(wchan, &size, &offset, &modname, namebuf);
+ if (sym_name)
+ return sprintf(buffer, "%s", sym_name);
+ return sprintf(buffer, "%lu", wchan);
+}
+#endif /* CONFIG_KALLSYMS */
+
+#ifdef CONFIG_SCHEDSTATS
+/*
+ * Provides /proc/PID/schedstat
+ */
+static int proc_pid_schedstat(struct task_struct *task, char *buffer)
+{
+ return sprintf(buffer, "%lu %lu %lu\n",
+ task->sched_info.cpu_time,
+ task->sched_info.run_delay,
+ task->sched_info.pcnt);
+}
+#endif
+
+/* The badness from the OOM killer */
+unsigned long badness(struct task_struct *p, unsigned long uptime);
+static int proc_oom_score(struct task_struct *task, char *buffer)
+{
+ unsigned long points;
+ struct timespec uptime;
+
+ do_posix_clock_monotonic_gettime(&uptime);
+ points = badness(task, uptime.tv_sec);
+ return sprintf(buffer, "%lu\n", points);
+}
+
+/************************************************************************/
+/* Here the fs part begins */
+/************************************************************************/
+
+/* permission checks */
+
+static int proc_check_root(struct inode *inode)
+{
+ struct dentry *de, *base, *root;
+ struct vfsmount *our_vfsmnt, *vfsmnt, *mnt;
+ int res = 0;
+
+ if (proc_root_link(inode, &root, &vfsmnt)) /* Ewww... */
+ return -ENOENT;
+ read_lock(&current->fs->lock);
+ our_vfsmnt = mntget(current->fs->rootmnt);
+ base = dget(current->fs->root);
+ read_unlock(&current->fs->lock);
+
+ spin_lock(&vfsmount_lock);
+ de = root;
+ mnt = vfsmnt;
+
+ while (vfsmnt != our_vfsmnt) {
+ if (vfsmnt == vfsmnt->mnt_parent)
+ goto out;
+ de = vfsmnt->mnt_mountpoint;
+ vfsmnt = vfsmnt->mnt_parent;
+ }
+
+ if (!is_subdir(de, base))
+ goto out;
+ spin_unlock(&vfsmount_lock);
+
+exit:
+ dput(base);
+ mntput(our_vfsmnt);
+ dput(root);
+ mntput(mnt);
+ return res;
+out:
+ spin_unlock(&vfsmount_lock);
+ res = -EACCES;
+ goto exit;
+}
+
+static int proc_permission(struct inode *inode, int mask, struct nameidata *nd)
+{
+ if (generic_permission(inode, mask, NULL) != 0)
+ return -EACCES;
+ return proc_check_root(inode);
+}
+
+extern struct seq_operations proc_pid_maps_op;
+static int maps_open(struct inode *inode, struct file *file)
+{
+ struct task_struct *task = proc_task(inode);
+ int ret = seq_open(file, &proc_pid_maps_op);
+ if (!ret) {
+ struct seq_file *m = file->private_data;
+ m->private = task;
+ }
+ return ret;
+}
+
+static struct file_operations proc_maps_operations = {
+ .open = maps_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+extern struct seq_operations mounts_op;
+static int mounts_open(struct inode *inode, struct file *file)
+{
+ struct task_struct *task = proc_task(inode);
+ int ret = seq_open(file, &mounts_op);
+
+ if (!ret) {
+ struct seq_file *m = file->private_data;
+ struct namespace *namespace;
+ task_lock(task);
+ namespace = task->namespace;
+ if (namespace)
+ get_namespace(namespace);
+ task_unlock(task);
+
+ if (namespace)
+ m->private = namespace;
+ else {
+ seq_release(inode, file);
+ ret = -EINVAL;
+ }
+ }
+ return ret;
+}
+
+static int mounts_release(struct inode *inode, struct file *file)
+{
+ struct seq_file *m = file->private_data;
+ struct namespace *namespace = m->private;
+ put_namespace(namespace);
+ return seq_release(inode, file);
+}
+
+static struct file_operations proc_mounts_operations = {
+ .open = mounts_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = mounts_release,
+};
+
+#define PROC_BLOCK_SIZE (3*1024) /* 4K page size but our output routines use some slack for overruns */
+
+static ssize_t proc_info_read(struct file * file, char __user * buf,
+ size_t count, loff_t *ppos)
+{
+ struct inode * inode = file->f_dentry->d_inode;
+ unsigned long page;
+ ssize_t length;
+ struct task_struct *task = proc_task(inode);
+
+ if (count > PROC_BLOCK_SIZE)
+ count = PROC_BLOCK_SIZE;
+ if (!(page = __get_free_page(GFP_KERNEL)))
+ return -ENOMEM;
+
+ length = PROC_I(inode)->op.proc_read(task, (char*)page);
+
+ if (length >= 0)
+ length = simple_read_from_buffer(buf, count, ppos, (char *)page, length);
+ free_page(page);
+ return length;
+}
+
+static struct file_operations proc_info_file_operations = {
+ .read = proc_info_read,
+};
+
+static int mem_open(struct inode* inode, struct file* file)
+{
+ file->private_data = (void*)((long)current->self_exec_id);
+ return 0;
+}
+
+static ssize_t mem_read(struct file * file, char __user * buf,
+ size_t count, loff_t *ppos)
+{
+ struct task_struct *task = proc_task(file->f_dentry->d_inode);
+ char *page;
+ unsigned long src = *ppos;
+ int ret = -ESRCH;
+ struct mm_struct *mm;
+
+ if (!MAY_PTRACE(task) || !may_ptrace_attach(task))
+ goto out;
+
+ ret = -ENOMEM;
+ page = (char *)__get_free_page(GFP_USER);
+ if (!page)
+ goto out;
+
+ ret = 0;
+
+ mm = get_task_mm(task);
+ if (!mm)
+ goto out_free;
+
+ ret = -EIO;
+
+ if (file->private_data != (void*)((long)current->self_exec_id))
+ goto out_put;
+
+ ret = 0;
+
+ while (count > 0) {
+ int this_len, retval;
+
+ this_len = (count > PAGE_SIZE) ? PAGE_SIZE : count;
+ retval = access_process_vm(task, src, page, this_len, 0);
+ if (!retval || !MAY_PTRACE(task) || !may_ptrace_attach(task)) {
+ if (!ret)
+ ret = -EIO;
+ break;
+ }
+
+ if (copy_to_user(buf, page, retval)) {
+ ret = -EFAULT;
+ break;
+ }
+
+ ret += retval;
+ src += retval;
+ buf += retval;
+ count -= retval;
+ }
+ *ppos = src;
+
+out_put:
+ mmput(mm);
+out_free:
+ free_page((unsigned long) page);
+out:
+ return ret;
+}
+
+#define mem_write NULL
+
+#ifndef mem_write
+/* This is a security hazard */
+static ssize_t mem_write(struct file * file, const char * buf,
+ size_t count, loff_t *ppos)
+{
+ int copied = 0;
+ char *page;
+ struct task_struct *task = proc_task(file->f_dentry->d_inode);
+ unsigned long dst = *ppos;
+
+ if (!MAY_PTRACE(task) || !may_ptrace_attach(task))
+ return -ESRCH;
+
+ page = (char *)__get_free_page(GFP_USER);
+ if (!page)
+ return -ENOMEM;
+
+ while (count > 0) {
+ int this_len, retval;
+
+ this_len = (count > PAGE_SIZE) ? PAGE_SIZE : count;
+ if (copy_from_user(page, buf, this_len)) {
+ copied = -EFAULT;
+ break;
+ }
+ retval = access_process_vm(task, dst, page, this_len, 1);
+ if (!retval) {
+ if (!copied)
+ copied = -EIO;
+ break;
+ }
+ copied += retval;
+ buf += retval;
+ dst += retval;
+ count -= retval;
+ }
+ *ppos = dst;
+ free_page((unsigned long) page);
+ return copied;
+}
+#endif
+
+static loff_t mem_lseek(struct file * file, loff_t offset, int orig)
+{
+ switch (orig) {
+ case 0:
+ file->f_pos = offset;
+ break;
+ case 1:
+ file->f_pos += offset;
+ break;
+ default:
+ return -EINVAL;
+ }
+ force_successful_syscall_return();
+ return file->f_pos;
+}
+
+static struct file_operations proc_mem_operations = {
+ .llseek = mem_lseek,
+ .read = mem_read,
+ .write = mem_write,
+ .open = mem_open,
+};
+
+static ssize_t oom_adjust_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct task_struct *task = proc_task(file->f_dentry->d_inode);
+ char buffer[8];
+ size_t len;
+ int oom_adjust = task->oomkilladj;
+ loff_t __ppos = *ppos;
+
+ len = sprintf(buffer, "%i\n", oom_adjust);
+ if (__ppos >= len)
+ return 0;
+ if (count > len-__ppos)
+ count = len-__ppos;
+ if (copy_to_user(buf, buffer + __ppos, count))
+ return -EFAULT;
+ *ppos = __ppos + count;
+ return count;
+}
+
+static ssize_t oom_adjust_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct task_struct *task = proc_task(file->f_dentry->d_inode);
+ char buffer[8], *end;
+ int oom_adjust;
+
+ if (!capable(CAP_SYS_RESOURCE))
+ return -EPERM;
+ memset(buffer, 0, 8);
+ if (count > 6)
+ count = 6;
+ if (copy_from_user(buffer, buf, count))
+ return -EFAULT;
+ oom_adjust = simple_strtol(buffer, &end, 0);
+ if (oom_adjust < -16 || oom_adjust > 15)
+ return -EINVAL;
+ if (*end == '\n')
+ end++;
+ task->oomkilladj = oom_adjust;
+ if (end - buffer == 0)
+ return -EIO;
+ return end - buffer;
+}
+
+static struct file_operations proc_oom_adjust_operations = {
+ .read = oom_adjust_read,
+ .write = oom_adjust_write,
+};
+
+static struct inode_operations proc_mem_inode_operations = {
+ .permission = proc_permission,
+};
+
+#ifdef CONFIG_AUDITSYSCALL
+#define TMPBUFLEN 21
+static ssize_t proc_loginuid_read(struct file * file, char __user * buf,
+ size_t count, loff_t *ppos)
+{
+ struct inode * inode = file->f_dentry->d_inode;
+ struct task_struct *task = proc_task(inode);
+ ssize_t length;
+ char tmpbuf[TMPBUFLEN];
+
+ length = scnprintf(tmpbuf, TMPBUFLEN, "%u",
+ audit_get_loginuid(task->audit_context));
+ return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
+}
+
+static ssize_t proc_loginuid_write(struct file * file, const char __user * buf,
+ size_t count, loff_t *ppos)
+{
+ struct inode * inode = file->f_dentry->d_inode;
+ char *page, *tmp;
+ ssize_t length;
+ struct task_struct *task = proc_task(inode);
+ uid_t loginuid;
+
+ if (!capable(CAP_AUDIT_CONTROL))
+ return -EPERM;
+
+ if (current != task)
+ return -EPERM;
+
+ if (count > PAGE_SIZE)
+ count = PAGE_SIZE;
+
+ if (*ppos != 0) {
+ /* No partial writes. */
+ return -EINVAL;
+ }
+ page = (char*)__get_free_page(GFP_USER);
+ if (!page)
+ return -ENOMEM;
+ length = -EFAULT;
+ if (copy_from_user(page, buf, count))
+ goto out_free_page;
+
+ loginuid = simple_strtoul(page, &tmp, 10);
+ if (tmp == page) {
+ length = -EINVAL;
+ goto out_free_page;
+
+ }
+ length = audit_set_loginuid(task->audit_context, loginuid);
+ if (likely(length == 0))
+ length = count;
+
+out_free_page:
+ free_page((unsigned long) page);
+ return length;
+}
+
+static struct file_operations proc_loginuid_operations = {
+ .read = proc_loginuid_read,
+ .write = proc_loginuid_write,
+};
+#endif
+
+#ifdef CONFIG_SECCOMP
+static ssize_t seccomp_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct task_struct *tsk = proc_task(file->f_dentry->d_inode);
+ char __buf[20];
+ loff_t __ppos = *ppos;
+ size_t len;
+
+ /* no need to print the trailing zero, so use only len */
+ len = sprintf(__buf, "%u\n", tsk->seccomp.mode);
+ if (__ppos >= len)
+ return 0;
+ if (count > len - __ppos)
+ count = len - __ppos;
+ if (copy_to_user(buf, __buf + __ppos, count))
+ return -EFAULT;
+ *ppos = __ppos + count;
+ return count;
+}
+
+static ssize_t seccomp_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct task_struct *tsk = proc_task(file->f_dentry->d_inode);
+ char __buf[20], *end;
+ unsigned int seccomp_mode;
+
+ /* can set it only once to be even more secure */
+ if (unlikely(tsk->seccomp.mode))
+ return -EPERM;
+
+ memset(__buf, 0, sizeof(__buf));
+ count = min(count, sizeof(__buf) - 1);
+ if (copy_from_user(__buf, buf, count))
+ return -EFAULT;
+ seccomp_mode = simple_strtoul(__buf, &end, 0);
+ if (*end == '\n')
+ end++;
+ if (seccomp_mode && seccomp_mode <= NR_SECCOMP_MODES) {
+ tsk->seccomp.mode = seccomp_mode;
+ set_tsk_thread_flag(tsk, TIF_SECCOMP);
+ } else
+ return -EINVAL;
+ if (unlikely(!(end - __buf)))
+ return -EIO;
+ return end - __buf;
+}
+
+static struct file_operations proc_seccomp_operations = {
+ .read = seccomp_read,
+ .write = seccomp_write,
+};
+#endif /* CONFIG_SECCOMP */
+
+static int proc_pid_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+ struct inode *inode = dentry->d_inode;
+ int error = -EACCES;
+
+ /* We don't need a base pointer in the /proc filesystem */
+ path_release(nd);
+
+ if (current->fsuid != inode->i_uid && !capable(CAP_DAC_OVERRIDE))
+ goto out;
+ error = proc_check_root(inode);
+ if (error)
+ goto out;
+
+ error = PROC_I(inode)->op.proc_get_link(inode, &nd->dentry, &nd->mnt);
+ nd->last_type = LAST_BIND;
+out:
+ return error;
+}
+
+static int do_proc_readlink(struct dentry *dentry, struct vfsmount *mnt,
+ char __user *buffer, int buflen)
+{
+ struct inode * inode;
+ char *tmp = (char*)__get_free_page(GFP_KERNEL), *path;
+ int len;
+
+ if (!tmp)
+ return -ENOMEM;
+
+ inode = dentry->d_inode;
+ path = d_path(dentry, mnt, tmp, PAGE_SIZE);
+ len = PTR_ERR(path);
+ if (IS_ERR(path))
+ goto out;
+ len = tmp + PAGE_SIZE - 1 - path;
+
+ if (len > buflen)
+ len = buflen;
+ if (copy_to_user(buffer, path, len))
+ len = -EFAULT;
+ out:
+ free_page((unsigned long)tmp);
+ return len;
+}
+
+static int proc_pid_readlink(struct dentry * dentry, char __user * buffer, int buflen)
+{
+ int error = -EACCES;
+ struct inode *inode = dentry->d_inode;
+ struct dentry *de;
+ struct vfsmount *mnt = NULL;
+
+ lock_kernel();
+
+ if (current->fsuid != inode->i_uid && !capable(CAP_DAC_OVERRIDE))
+ goto out;
+ error = proc_check_root(inode);
+ if (error)
+ goto out;
+
+ error = PROC_I(inode)->op.proc_get_link(inode, &de, &mnt);
+ if (error)
+ goto out;
+
+ error = do_proc_readlink(de, mnt, buffer, buflen);
+ dput(de);
+ mntput(mnt);
+out:
+ unlock_kernel();
+ return error;
+}
+
+static struct inode_operations proc_pid_link_inode_operations = {
+ .readlink = proc_pid_readlink,
+ .follow_link = proc_pid_follow_link
+};
+
+#define NUMBUF 10
+
+static int proc_readfd(struct file * filp, void * dirent, filldir_t filldir)
+{
+ struct inode *inode = filp->f_dentry->d_inode;
+ struct task_struct *p = proc_task(inode);
+ unsigned int fd, tid, ino;
+ int retval;
+ char buf[NUMBUF];
+ struct files_struct * files;
+
+ retval = -ENOENT;
+ if (!pid_alive(p))
+ goto out;
+ retval = 0;
+ tid = p->pid;
+
+ fd = filp->f_pos;
+ switch (fd) {
+ case 0:
+ if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR) < 0)
+ goto out;
+ filp->f_pos++;
+ case 1:
+ ino = fake_ino(tid, PROC_TID_INO);
+ if (filldir(dirent, "..", 2, 1, ino, DT_DIR) < 0)
+ goto out;
+ filp->f_pos++;
+ default:
+ files = get_files_struct(p);
+ if (!files)
+ goto out;
+ spin_lock(&files->file_lock);
+ for (fd = filp->f_pos-2;
+ fd < files->max_fds;
+ fd++, filp->f_pos++) {
+ unsigned int i,j;
+
+ if (!fcheck_files(files, fd))
+ continue;
+ spin_unlock(&files->file_lock);
+
+ j = NUMBUF;
+ i = fd;
+ do {
+ j--;
+ buf[j] = '0' + (i % 10);
+ i /= 10;
+ } while (i);
+
+ ino = fake_ino(tid, PROC_TID_FD_DIR + fd);
+ if (filldir(dirent, buf+j, NUMBUF-j, fd+2, ino, DT_LNK) < 0) {
+ spin_lock(&files->file_lock);
+ break;
+ }
+ spin_lock(&files->file_lock);
+ }
+ spin_unlock(&files->file_lock);
+ put_files_struct(files);
+ }
+out:
+ return retval;
+}
+
+static int proc_pident_readdir(struct file *filp,
+ void *dirent, filldir_t filldir,
+ struct pid_entry *ents, unsigned int nents)
+{
+ int i;
+ int pid;
+ struct dentry *dentry = filp->f_dentry;
+ struct inode *inode = dentry->d_inode;
+ struct pid_entry *p;
+ ino_t ino;
+ int ret;
+
+ ret = -ENOENT;
+ if (!pid_alive(proc_task(inode)))
+ goto out;
+
+ ret = 0;
+ pid = proc_task(inode)->pid;
+ i = filp->f_pos;
+ switch (i) {
+ case 0:
+ ino = inode->i_ino;
+ if (filldir(dirent, ".", 1, i, ino, DT_DIR) < 0)
+ goto out;
+ i++;
+ filp->f_pos++;
+ /* fall through */
+ case 1:
+ ino = parent_ino(dentry);
+ if (filldir(dirent, "..", 2, i, ino, DT_DIR) < 0)
+ goto out;
+ i++;
+ filp->f_pos++;
+ /* fall through */
+ default:
+ i -= 2;
+ if (i >= nents) {
+ ret = 1;
+ goto out;
+ }
+ p = ents + i;
+ while (p->name) {
+ if (filldir(dirent, p->name, p->len, filp->f_pos,
+ fake_ino(pid, p->type), p->mode >> 12) < 0)
+ goto out;
+ filp->f_pos++;
+ p++;
+ }
+ }
+
+ ret = 1;
+out:
+ return ret;
+}
+
+static int proc_tgid_base_readdir(struct file * filp,
+ void * dirent, filldir_t filldir)
+{
+ return proc_pident_readdir(filp,dirent,filldir,
+ tgid_base_stuff,ARRAY_SIZE(tgid_base_stuff));
+}
+
+static int proc_tid_base_readdir(struct file * filp,
+ void * dirent, filldir_t filldir)
+{
+ return proc_pident_readdir(filp,dirent,filldir,
+ tid_base_stuff,ARRAY_SIZE(tid_base_stuff));
+}
+
+/* building an inode */
+
+static int task_dumpable(struct task_struct *task)
+{
+ int dumpable = 0;
+ struct mm_struct *mm;
+
+ task_lock(task);
+ mm = task->mm;
+ if (mm)
+ dumpable = mm->dumpable;
+ task_unlock(task);
+ return dumpable;
+}
+
+
+static struct inode *proc_pid_make_inode(struct super_block * sb, struct task_struct *task, int ino)
+{
+ struct inode * inode;
+ struct proc_inode *ei;
+
+ /* We need a new inode */
+
+ inode = new_inode(sb);
+ if (!inode)
+ goto out;
+
+ /* Common stuff */
+ ei = PROC_I(inode);
+ ei->task = NULL;
+ inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
+ inode->i_ino = fake_ino(task->pid, ino);
+
+ if (!pid_alive(task))
+ goto out_unlock;
+
+ /*
+ * grab the reference to task.
+ */
+ get_task_struct(task);
+ ei->task = task;
+ ei->type = ino;
+ inode->i_uid = 0;
+ inode->i_gid = 0;
+ if (ino == PROC_TGID_INO || ino == PROC_TID_INO || task_dumpable(task)) {
+ inode->i_uid = task->euid;
+ inode->i_gid = task->egid;
+ }
+ security_task_to_inode(task, inode);
+
+out:
+ return inode;
+
+out_unlock:
+ ei->pde = NULL;
+ iput(inode);
+ return NULL;
+}
+
+/* dentry stuff */
+
+/*
+ * Exceptional case: normally we are not allowed to unhash a busy
+ * directory. In this case, however, we can do it - no aliasing problems
+ * due to the way we treat inodes.
+ *
+ * Rewrite the inode's ownerships here because the owning task may have
+ * performed a setuid(), etc.
+ */
+static int pid_revalidate(struct dentry *dentry, struct nameidata *nd)
+{
+ struct inode *inode = dentry->d_inode;
+ struct task_struct *task = proc_task(inode);
+ if (pid_alive(task)) {
+ if (proc_type(inode) == PROC_TGID_INO || proc_type(inode) == PROC_TID_INO || task_dumpable(task)) {
+ inode->i_uid = task->euid;
+ inode->i_gid = task->egid;
+ } else {
+ inode->i_uid = 0;
+ inode->i_gid = 0;
+ }
+ security_task_to_inode(task, inode);
+ return 1;
+ }
+ d_drop(dentry);
+ return 0;
+}
+
+static int tid_fd_revalidate(struct dentry *dentry, struct nameidata *nd)
+{
+ struct inode *inode = dentry->d_inode;
+ struct task_struct *task = proc_task(inode);
+ int fd = proc_type(inode) - PROC_TID_FD_DIR;
+ struct files_struct *files;
+
+ files = get_files_struct(task);
+ if (files) {
+ spin_lock(&files->file_lock);
+ if (fcheck_files(files, fd)) {
+ spin_unlock(&files->file_lock);
+ put_files_struct(files);
+ if (task_dumpable(task)) {
+ inode->i_uid = task->euid;
+ inode->i_gid = task->egid;
+ } else {
+ inode->i_uid = 0;
+ inode->i_gid = 0;
+ }
+ security_task_to_inode(task, inode);
+ return 1;
+ }
+ spin_unlock(&files->file_lock);
+ put_files_struct(files);
+ }
+ d_drop(dentry);
+ return 0;
+}
+
+static void pid_base_iput(struct dentry *dentry, struct inode *inode)
+{
+ struct task_struct *task = proc_task(inode);
+ spin_lock(&task->proc_lock);
+ if (task->proc_dentry == dentry)
+ task->proc_dentry = NULL;
+ spin_unlock(&task->proc_lock);
+ iput(inode);
+}
+
+static int pid_delete_dentry(struct dentry * dentry)
+{
+ /* Is the task we represent dead?
+ * If so, then don't put the dentry on the lru list,
+ * kill it immediately.
+ */
+ return !pid_alive(proc_task(dentry->d_inode));
+}
+
+static struct dentry_operations tid_fd_dentry_operations =
+{
+ .d_revalidate = tid_fd_revalidate,
+ .d_delete = pid_delete_dentry,
+};
+
+static struct dentry_operations pid_dentry_operations =
+{
+ .d_revalidate = pid_revalidate,
+ .d_delete = pid_delete_dentry,
+};
+
+static struct dentry_operations pid_base_dentry_operations =
+{
+ .d_revalidate = pid_revalidate,
+ .d_iput = pid_base_iput,
+ .d_delete = pid_delete_dentry,
+};
+
+/* Lookups */
+
+static unsigned name_to_int(struct dentry *dentry)
+{
+ const char *name = dentry->d_name.name;
+ int len = dentry->d_name.len;
+ unsigned n = 0;
+
+ if (len > 1 && *name == '0')
+ goto out;
+ while (len-- > 0) {
+ unsigned c = *name++ - '0';
+ if (c > 9)
+ goto out;
+ if (n >= (~0U-9)/10)
+ goto out;
+ n *= 10;
+ n += c;
+ }
+ return n;
+out:
+ return ~0U;
+}
+
+/* SMP-safe */
+static struct dentry *proc_lookupfd(struct inode * dir, struct dentry * dentry, struct nameidata *nd)
+{
+ struct task_struct *task = proc_task(dir);
+ unsigned fd = name_to_int(dentry);
+ struct file * file;
+ struct files_struct * files;
+ struct inode *inode;
+ struct proc_inode *ei;
+
+ if (fd == ~0U)
+ goto out;
+ if (!pid_alive(task))
+ goto out;
+
+ inode = proc_pid_make_inode(dir->i_sb, task, PROC_TID_FD_DIR+fd);
+ if (!inode)
+ goto out;
+ ei = PROC_I(inode);
+ files = get_files_struct(task);
+ if (!files)
+ goto out_unlock;
+ inode->i_mode = S_IFLNK;
+ spin_lock(&files->file_lock);
+ file = fcheck_files(files, fd);
+ if (!file)
+ goto out_unlock2;
+ if (file->f_mode & 1)
+ inode->i_mode |= S_IRUSR | S_IXUSR;
+ if (file->f_mode & 2)
+ inode->i_mode |= S_IWUSR | S_IXUSR;
+ spin_unlock(&files->file_lock);
+ put_files_struct(files);
+ inode->i_op = &proc_pid_link_inode_operations;
+ inode->i_size = 64;
+ ei->op.proc_get_link = proc_fd_link;
+ dentry->d_op = &tid_fd_dentry_operations;
+ d_add(dentry, inode);
+ return NULL;
+
+out_unlock2:
+ spin_unlock(&files->file_lock);
+ put_files_struct(files);
+out_unlock:
+ iput(inode);
+out:
+ return ERR_PTR(-ENOENT);
+}
+
+static int proc_task_readdir(struct file * filp, void * dirent, filldir_t filldir);
+static struct dentry *proc_task_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd);
+
+static struct file_operations proc_fd_operations = {
+ .read = generic_read_dir,
+ .readdir = proc_readfd,
+};
+
+static struct file_operations proc_task_operations = {
+ .read = generic_read_dir,
+ .readdir = proc_task_readdir,
+};
+
+/*
+ * proc directories can do almost nothing..
+ */
+static struct inode_operations proc_fd_inode_operations = {
+ .lookup = proc_lookupfd,
+ .permission = proc_permission,
+};
+
+static struct inode_operations proc_task_inode_operations = {
+ .lookup = proc_task_lookup,
+ .permission = proc_permission,
+};
+
+#ifdef CONFIG_SECURITY
+static ssize_t proc_pid_attr_read(struct file * file, char __user * buf,
+ size_t count, loff_t *ppos)
+{
+ struct inode * inode = file->f_dentry->d_inode;
+ unsigned long page;
+ ssize_t length;
+ struct task_struct *task = proc_task(inode);
+
+ if (count > PAGE_SIZE)
+ count = PAGE_SIZE;
+ if (!(page = __get_free_page(GFP_KERNEL)))
+ return -ENOMEM;
+
+ length = security_getprocattr(task,
+ (char*)file->f_dentry->d_name.name,
+ (void*)page, count);
+ if (length >= 0)
+ length = simple_read_from_buffer(buf, count, ppos, (char *)page, length);
+ free_page(page);
+ return length;
+}
+
+static ssize_t proc_pid_attr_write(struct file * file, const char __user * buf,
+ size_t count, loff_t *ppos)
+{
+ struct inode * inode = file->f_dentry->d_inode;
+ char *page;
+ ssize_t length;
+ struct task_struct *task = proc_task(inode);
+
+ if (count > PAGE_SIZE)
+ count = PAGE_SIZE;
+ if (*ppos != 0) {
+ /* No partial writes. */
+ return -EINVAL;
+ }
+ page = (char*)__get_free_page(GFP_USER);
+ if (!page)
+ return -ENOMEM;
+ length = -EFAULT;
+ if (copy_from_user(page, buf, count))
+ goto out;
+
+ length = security_setprocattr(task,
+ (char*)file->f_dentry->d_name.name,
+ (void*)page, count);
+out:
+ free_page((unsigned long) page);
+ return length;
+}
+
+static struct file_operations proc_pid_attr_operations = {
+ .read = proc_pid_attr_read,
+ .write = proc_pid_attr_write,
+};
+
+static struct file_operations proc_tid_attr_operations;
+static struct inode_operations proc_tid_attr_inode_operations;
+static struct file_operations proc_tgid_attr_operations;
+static struct inode_operations proc_tgid_attr_inode_operations;
+#endif
+
+/* SMP-safe */
+static struct dentry *proc_pident_lookup(struct inode *dir,
+ struct dentry *dentry,
+ struct pid_entry *ents)
+{
+ struct inode *inode;
+ int error;
+ struct task_struct *task = proc_task(dir);
+ struct pid_entry *p;
+ struct proc_inode *ei;
+
+ error = -ENOENT;
+ inode = NULL;
+
+ if (!pid_alive(task))
+ goto out;
+
+ for (p = ents; p->name; p++) {
+ if (p->len != dentry->d_name.len)
+ continue;
+ if (!memcmp(dentry->d_name.name, p->name, p->len))
+ break;
+ }
+ if (!p->name)
+ goto out;
+
+ error = -EINVAL;
+ inode = proc_pid_make_inode(dir->i_sb, task, p->type);
+ if (!inode)
+ goto out;
+
+ ei = PROC_I(inode);
+ inode->i_mode = p->mode;
+ /*
+ * Yes, it does not scale. And it should not. Don't add
+ * new entries into /proc/<tgid>/ without very good reasons.
+ */
+ switch(p->type) {
+ case PROC_TGID_TASK:
+ inode->i_nlink = 3;
+ inode->i_op = &proc_task_inode_operations;
+ inode->i_fop = &proc_task_operations;
+ break;
+ case PROC_TID_FD:
+ case PROC_TGID_FD:
+ inode->i_nlink = 2;
+ inode->i_op = &proc_fd_inode_operations;
+ inode->i_fop = &proc_fd_operations;
+ break;
+ case PROC_TID_EXE:
+ case PROC_TGID_EXE:
+ inode->i_op = &proc_pid_link_inode_operations;
+ ei->op.proc_get_link = proc_exe_link;
+ break;
+ case PROC_TID_CWD:
+ case PROC_TGID_CWD:
+ inode->i_op = &proc_pid_link_inode_operations;
+ ei->op.proc_get_link = proc_cwd_link;
+ break;
+ case PROC_TID_ROOT:
+ case PROC_TGID_ROOT:
+ inode->i_op = &proc_pid_link_inode_operations;
+ ei->op.proc_get_link = proc_root_link;
+ break;
+ case PROC_TID_ENVIRON:
+ case PROC_TGID_ENVIRON:
+ inode->i_fop = &proc_info_file_operations;
+ ei->op.proc_read = proc_pid_environ;
+ break;
+ case PROC_TID_AUXV:
+ case PROC_TGID_AUXV:
+ inode->i_fop = &proc_info_file_operations;
+ ei->op.proc_read = proc_pid_auxv;
+ break;
+ case PROC_TID_STATUS:
+ case PROC_TGID_STATUS:
+ inode->i_fop = &proc_info_file_operations;
+ ei->op.proc_read = proc_pid_status;
+ break;
+ case PROC_TID_STAT:
+ inode->i_fop = &proc_info_file_operations;
+ ei->op.proc_read = proc_tid_stat;
+ break;
+ case PROC_TGID_STAT:
+ inode->i_fop = &proc_info_file_operations;
+ ei->op.proc_read = proc_tgid_stat;
+ break;
+ case PROC_TID_CMDLINE:
+ case PROC_TGID_CMDLINE:
+ inode->i_fop = &proc_info_file_operations;
+ ei->op.proc_read = proc_pid_cmdline;
+ break;
+ case PROC_TID_STATM:
+ case PROC_TGID_STATM:
+ inode->i_fop = &proc_info_file_operations;
+ ei->op.proc_read = proc_pid_statm;
+ break;
+ case PROC_TID_MAPS:
+ case PROC_TGID_MAPS:
+ inode->i_fop = &proc_maps_operations;
+ break;
+ case PROC_TID_MEM:
+ case PROC_TGID_MEM:
+ inode->i_op = &proc_mem_inode_operations;
+ inode->i_fop = &proc_mem_operations;
+ break;
+#ifdef CONFIG_SECCOMP
+ case PROC_TID_SECCOMP:
+ case PROC_TGID_SECCOMP:
+ inode->i_fop = &proc_seccomp_operations;
+ break;
+#endif /* CONFIG_SECCOMP */
+ case PROC_TID_MOUNTS:
+ case PROC_TGID_MOUNTS:
+ inode->i_fop = &proc_mounts_operations;
+ break;
+#ifdef CONFIG_SECURITY
+ case PROC_TID_ATTR:
+ inode->i_nlink = 2;
+ inode->i_op = &proc_tid_attr_inode_operations;
+ inode->i_fop = &proc_tid_attr_operations;
+ break;
+ case PROC_TGID_ATTR:
+ inode->i_nlink = 2;
+ inode->i_op = &proc_tgid_attr_inode_operations;
+ inode->i_fop = &proc_tgid_attr_operations;
+ break;
+ case PROC_TID_ATTR_CURRENT:
+ case PROC_TGID_ATTR_CURRENT:
+ case PROC_TID_ATTR_PREV:
+ case PROC_TGID_ATTR_PREV:
+ case PROC_TID_ATTR_EXEC:
+ case PROC_TGID_ATTR_EXEC:
+ case PROC_TID_ATTR_FSCREATE:
+ case PROC_TGID_ATTR_FSCREATE:
+ inode->i_fop = &proc_pid_attr_operations;
+ break;
+#endif
+#ifdef CONFIG_KALLSYMS
+ case PROC_TID_WCHAN:
+ case PROC_TGID_WCHAN:
+ inode->i_fop = &proc_info_file_operations;
+ ei->op.proc_read = proc_pid_wchan;
+ break;
+#endif
+#ifdef CONFIG_SCHEDSTATS
+ case PROC_TID_SCHEDSTAT:
+ case PROC_TGID_SCHEDSTAT:
+ inode->i_fop = &proc_info_file_operations;
+ ei->op.proc_read = proc_pid_schedstat;
+ break;
+#endif
+#ifdef CONFIG_CPUSETS
+ case PROC_TID_CPUSET:
+ case PROC_TGID_CPUSET:
+ inode->i_fop = &proc_cpuset_operations;
+ break;
+#endif
+ case PROC_TID_OOM_SCORE:
+ case PROC_TGID_OOM_SCORE:
+ inode->i_fop = &proc_info_file_operations;
+ ei->op.proc_read = proc_oom_score;
+ break;
+ case PROC_TID_OOM_ADJUST:
+ case PROC_TGID_OOM_ADJUST:
+ inode->i_fop = &proc_oom_adjust_operations;
+ break;
+#ifdef CONFIG_AUDITSYSCALL
+ case PROC_TID_LOGINUID:
+ case PROC_TGID_LOGINUID:
+ inode->i_fop = &proc_loginuid_operations;
+ break;
+#endif
+ default:
+ printk("procfs: impossible type (%d)",p->type);
+ iput(inode);
+ return ERR_PTR(-EINVAL);
+ }
+ dentry->d_op = &pid_dentry_operations;
+ d_add(dentry, inode);
+ return NULL;
+
+out:
+ return ERR_PTR(error);
+}
+
+static struct dentry *proc_tgid_base_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd){
+ return proc_pident_lookup(dir, dentry, tgid_base_stuff);
+}
+
+static struct dentry *proc_tid_base_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd){
+ return proc_pident_lookup(dir, dentry, tid_base_stuff);
+}
+
+static struct file_operations proc_tgid_base_operations = {
+ .read = generic_read_dir,
+ .readdir = proc_tgid_base_readdir,
+};
+
+static struct file_operations proc_tid_base_operations = {
+ .read = generic_read_dir,
+ .readdir = proc_tid_base_readdir,
+};
+
+static struct inode_operations proc_tgid_base_inode_operations = {
+ .lookup = proc_tgid_base_lookup,
+};
+
+static struct inode_operations proc_tid_base_inode_operations = {
+ .lookup = proc_tid_base_lookup,
+};
+
+#ifdef CONFIG_SECURITY
+static int proc_tgid_attr_readdir(struct file * filp,
+ void * dirent, filldir_t filldir)
+{
+ return proc_pident_readdir(filp,dirent,filldir,
+ tgid_attr_stuff,ARRAY_SIZE(tgid_attr_stuff));
+}
+
+static int proc_tid_attr_readdir(struct file * filp,
+ void * dirent, filldir_t filldir)
+{
+ return proc_pident_readdir(filp,dirent,filldir,
+ tid_attr_stuff,ARRAY_SIZE(tid_attr_stuff));
+}
+
+static struct file_operations proc_tgid_attr_operations = {
+ .read = generic_read_dir,
+ .readdir = proc_tgid_attr_readdir,
+};
+
+static struct file_operations proc_tid_attr_operations = {
+ .read = generic_read_dir,
+ .readdir = proc_tid_attr_readdir,
+};
+
+static struct dentry *proc_tgid_attr_lookup(struct inode *dir,
+ struct dentry *dentry, struct nameidata *nd)
+{
+ return proc_pident_lookup(dir, dentry, tgid_attr_stuff);
+}
+
+static struct dentry *proc_tid_attr_lookup(struct inode *dir,
+ struct dentry *dentry, struct nameidata *nd)
+{
+ return proc_pident_lookup(dir, dentry, tid_attr_stuff);
+}
+
+static struct inode_operations proc_tgid_attr_inode_operations = {
+ .lookup = proc_tgid_attr_lookup,
+};
+
+static struct inode_operations proc_tid_attr_inode_operations = {
+ .lookup = proc_tid_attr_lookup,
+};
+#endif
+
+/*
+ * /proc/self:
+ */
+static int proc_self_readlink(struct dentry *dentry, char __user *buffer,
+ int buflen)
+{
+ char tmp[30];
+ sprintf(tmp, "%d", current->tgid);
+ return vfs_readlink(dentry,buffer,buflen,tmp);
+}
+
+static int proc_self_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+ char tmp[30];
+ sprintf(tmp, "%d", current->tgid);
+ return vfs_follow_link(nd,tmp);
+}
+
+static struct inode_operations proc_self_inode_operations = {
+ .readlink = proc_self_readlink,
+ .follow_link = proc_self_follow_link,
+};
+
+/**
+ * proc_pid_unhash - Unhash /proc/<pid> entry from the dcache.
+ * @p: task that should be flushed.
+ *
+ * Drops the /proc/<pid> dcache entry from the hash chains.
+ *
+ * Dropping /proc/<pid> entries and detach_pid must be synchroneous,
+ * otherwise e.g. /proc/<pid>/exe might point to the wrong executable,
+ * if the pid value is immediately reused. This is enforced by
+ * - caller must acquire spin_lock(p->proc_lock)
+ * - must be called before detach_pid()
+ * - proc_pid_lookup acquires proc_lock, and checks that
+ * the target is not dead by looking at the attach count
+ * of PIDTYPE_PID.
+ */
+
+struct dentry *proc_pid_unhash(struct task_struct *p)
+{
+ struct dentry *proc_dentry;
+
+ proc_dentry = p->proc_dentry;
+ if (proc_dentry != NULL) {
+
+ spin_lock(&dcache_lock);
+ spin_lock(&proc_dentry->d_lock);
+ if (!d_unhashed(proc_dentry)) {
+ dget_locked(proc_dentry);
+ __d_drop(proc_dentry);
+ spin_unlock(&proc_dentry->d_lock);
+ } else {
+ spin_unlock(&proc_dentry->d_lock);
+ proc_dentry = NULL;
+ }
+ spin_unlock(&dcache_lock);
+ }
+ return proc_dentry;
+}
+
+/**
+ * proc_pid_flush - recover memory used by stale /proc/<pid>/x entries
+ * @proc_entry: directoy to prune.
+ *
+ * Shrink the /proc directory that was used by the just killed thread.
+ */
+
+void proc_pid_flush(struct dentry *proc_dentry)
+{
+ might_sleep();
+ if(proc_dentry != NULL) {
+ shrink_dcache_parent(proc_dentry);
+ dput(proc_dentry);
+ }
+}
+
+/* SMP-safe */
+struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd)
+{
+ struct task_struct *task;
+ struct inode *inode;
+ struct proc_inode *ei;
+ unsigned tgid;
+ int died;
+
+ if (dentry->d_name.len == 4 && !memcmp(dentry->d_name.name,"self",4)) {
+ inode = new_inode(dir->i_sb);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+ ei = PROC_I(inode);
+ inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
+ inode->i_ino = fake_ino(0, PROC_TGID_INO);
+ ei->pde = NULL;
+ inode->i_mode = S_IFLNK|S_IRWXUGO;
+ inode->i_uid = inode->i_gid = 0;
+ inode->i_size = 64;
+ inode->i_op = &proc_self_inode_operations;
+ d_add(dentry, inode);
+ return NULL;
+ }
+ tgid = name_to_int(dentry);
+ if (tgid == ~0U)
+ goto out;
+
+ read_lock(&tasklist_lock);
+ task = find_task_by_pid(tgid);
+ if (task)
+ get_task_struct(task);
+ read_unlock(&tasklist_lock);
+ if (!task)
+ goto out;
+
+ inode = proc_pid_make_inode(dir->i_sb, task, PROC_TGID_INO);
+
+
+ if (!inode) {
+ put_task_struct(task);
+ goto out;
+ }
+ inode->i_mode = S_IFDIR|S_IRUGO|S_IXUGO;
+ inode->i_op = &proc_tgid_base_inode_operations;
+ inode->i_fop = &proc_tgid_base_operations;
+ inode->i_nlink = 3;
+ inode->i_flags|=S_IMMUTABLE;
+
+ dentry->d_op = &pid_base_dentry_operations;
+
+ died = 0;
+ d_add(dentry, inode);
+ spin_lock(&task->proc_lock);
+ task->proc_dentry = dentry;
+ if (!pid_alive(task)) {
+ dentry = proc_pid_unhash(task);
+ died = 1;
+ }
+ spin_unlock(&task->proc_lock);
+
+ put_task_struct(task);
+ if (died) {
+ proc_pid_flush(dentry);
+ goto out;
+ }
+ return NULL;
+out:
+ return ERR_PTR(-ENOENT);
+}
+
+/* SMP-safe */
+static struct dentry *proc_task_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd)
+{
+ struct task_struct *task;
+ struct task_struct *leader = proc_task(dir);
+ struct inode *inode;
+ unsigned tid;
+
+ tid = name_to_int(dentry);
+ if (tid == ~0U)
+ goto out;
+
+ read_lock(&tasklist_lock);
+ task = find_task_by_pid(tid);
+ if (task)
+ get_task_struct(task);
+ read_unlock(&tasklist_lock);
+ if (!task)
+ goto out;
+ if (leader->tgid != task->tgid)
+ goto out_drop_task;
+
+ inode = proc_pid_make_inode(dir->i_sb, task, PROC_TID_INO);
+
+
+ if (!inode)
+ goto out_drop_task;
+ inode->i_mode = S_IFDIR|S_IRUGO|S_IXUGO;
+ inode->i_op = &proc_tid_base_inode_operations;
+ inode->i_fop = &proc_tid_base_operations;
+ inode->i_nlink = 3;
+ inode->i_flags|=S_IMMUTABLE;
+
+ dentry->d_op = &pid_base_dentry_operations;
+
+ d_add(dentry, inode);
+
+ put_task_struct(task);
+ return NULL;
+out_drop_task:
+ put_task_struct(task);
+out:
+ return ERR_PTR(-ENOENT);
+}
+
+#define PROC_NUMBUF 10
+#define PROC_MAXPIDS 20
+
+/*
+ * Get a few tgid's to return for filldir - we need to hold the
+ * tasklist lock while doing this, and we must release it before
+ * we actually do the filldir itself, so we use a temp buffer..
+ */
+static int get_tgid_list(int index, unsigned long version, unsigned int *tgids)
+{
+ struct task_struct *p;
+ int nr_tgids = 0;
+
+ index--;
+ read_lock(&tasklist_lock);
+ p = NULL;
+ if (version) {
+ p = find_task_by_pid(version);
+ if (p && !thread_group_leader(p))
+ p = NULL;
+ }
+
+ if (p)
+ index = 0;
+ else
+ p = next_task(&init_task);
+
+ for ( ; p != &init_task; p = next_task(p)) {
+ int tgid = p->pid;
+ if (!pid_alive(p))
+ continue;
+ if (--index >= 0)
+ continue;
+ tgids[nr_tgids] = tgid;
+ nr_tgids++;
+ if (nr_tgids >= PROC_MAXPIDS)
+ break;
+ }
+ read_unlock(&tasklist_lock);
+ return nr_tgids;
+}
+
+/*
+ * Get a few tid's to return for filldir - we need to hold the
+ * tasklist lock while doing this, and we must release it before
+ * we actually do the filldir itself, so we use a temp buffer..
+ */
+static int get_tid_list(int index, unsigned int *tids, struct inode *dir)
+{
+ struct task_struct *leader_task = proc_task(dir);
+ struct task_struct *task = leader_task;
+ int nr_tids = 0;
+
+ index -= 2;
+ read_lock(&tasklist_lock);
+ /*
+ * The starting point task (leader_task) might be an already
+ * unlinked task, which cannot be used to access the task-list
+ * via next_thread().
+ */
+ if (pid_alive(task)) do {
+ int tid = task->pid;
+
+ if (--index >= 0)
+ continue;
+ tids[nr_tids] = tid;
+ nr_tids++;
+ if (nr_tids >= PROC_MAXPIDS)
+ break;
+ } while ((task = next_thread(task)) != leader_task);
+ read_unlock(&tasklist_lock);
+ return nr_tids;
+}
+
+/* for the /proc/ directory itself, after non-process stuff has been done */
+int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir)
+{
+ unsigned int tgid_array[PROC_MAXPIDS];
+ char buf[PROC_NUMBUF];
+ unsigned int nr = filp->f_pos - FIRST_PROCESS_ENTRY;
+ unsigned int nr_tgids, i;
+ int next_tgid;
+
+ if (!nr) {
+ ino_t ino = fake_ino(0,PROC_TGID_INO);
+ if (filldir(dirent, "self", 4, filp->f_pos, ino, DT_LNK) < 0)
+ return 0;
+ filp->f_pos++;
+ nr++;
+ }
+
+ /* f_version caches the tgid value that the last readdir call couldn't
+ * return. lseek aka telldir automagically resets f_version to 0.
+ */
+ next_tgid = filp->f_version;
+ filp->f_version = 0;
+ for (;;) {
+ nr_tgids = get_tgid_list(nr, next_tgid, tgid_array);
+ if (!nr_tgids) {
+ /* no more entries ! */
+ break;
+ }
+ next_tgid = 0;
+
+ /* do not use the last found pid, reserve it for next_tgid */
+ if (nr_tgids == PROC_MAXPIDS) {
+ nr_tgids--;
+ next_tgid = tgid_array[nr_tgids];
+ }
+
+ for (i=0;i<nr_tgids;i++) {
+ int tgid = tgid_array[i];
+ ino_t ino = fake_ino(tgid,PROC_TGID_INO);
+ unsigned long j = PROC_NUMBUF;
+
+ do
+ buf[--j] = '0' + (tgid % 10);
+ while ((tgid /= 10) != 0);
+
+ if (filldir(dirent, buf+j, PROC_NUMBUF-j, filp->f_pos, ino, DT_DIR) < 0) {
+ /* returning this tgid failed, save it as the first
+ * pid for the next readir call */
+ filp->f_version = tgid_array[i];
+ goto out;
+ }
+ filp->f_pos++;
+ nr++;
+ }
+ }
+out:
+ return 0;
+}
+
+/* for the /proc/TGID/task/ directories */
+static int proc_task_readdir(struct file * filp, void * dirent, filldir_t filldir)
+{
+ unsigned int tid_array[PROC_MAXPIDS];
+ char buf[PROC_NUMBUF];
+ unsigned int nr_tids, i;
+ struct dentry *dentry = filp->f_dentry;
+ struct inode *inode = dentry->d_inode;
+ int retval = -ENOENT;
+ ino_t ino;
+ unsigned long pos = filp->f_pos; /* avoiding "long long" filp->f_pos */
+
+ if (!pid_alive(proc_task(inode)))
+ goto out;
+ retval = 0;
+
+ switch (pos) {
+ case 0:
+ ino = inode->i_ino;
+ if (filldir(dirent, ".", 1, pos, ino, DT_DIR) < 0)
+ goto out;
+ pos++;
+ /* fall through */
+ case 1:
+ ino = parent_ino(dentry);
+ if (filldir(dirent, "..", 2, pos, ino, DT_DIR) < 0)
+ goto out;
+ pos++;
+ /* fall through */
+ }
+
+ nr_tids = get_tid_list(pos, tid_array, inode);
+
+ for (i = 0; i < nr_tids; i++) {
+ unsigned long j = PROC_NUMBUF;
+ int tid = tid_array[i];
+
+ ino = fake_ino(tid,PROC_TID_INO);
+
+ do
+ buf[--j] = '0' + (tid % 10);
+ while ((tid /= 10) != 0);
+
+ if (filldir(dirent, buf+j, PROC_NUMBUF-j, pos, ino, DT_DIR) < 0)
+ break;
+ pos++;
+ }
+out:
+ filp->f_pos = pos;
+ return retval;
+}
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
new file mode 100644
index 00000000000..6c6315d0402
--- /dev/null
+++ b/fs/proc/generic.c
@@ -0,0 +1,705 @@
+/*
+ * proc/fs/generic.c --- generic routines for the proc-fs
+ *
+ * This file contains generic proc-fs routines for handling
+ * directories and files.
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds.
+ * Copyright (C) 1997 Theodore Ts'o
+ */
+
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/module.h>
+#include <linux/mount.h>
+#include <linux/smp_lock.h>
+#include <linux/init.h>
+#include <linux/idr.h>
+#include <linux/namei.h>
+#include <linux/bitops.h>
+#include <asm/uaccess.h>
+
+static ssize_t proc_file_read(struct file *file, char __user *buf,
+ size_t nbytes, loff_t *ppos);
+static ssize_t proc_file_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *ppos);
+static loff_t proc_file_lseek(struct file *, loff_t, int);
+
+int proc_match(int len, const char *name, struct proc_dir_entry *de)
+{
+ if (de->namelen != len)
+ return 0;
+ return !memcmp(name, de->name, len);
+}
+
+static struct file_operations proc_file_operations = {
+ .llseek = proc_file_lseek,
+ .read = proc_file_read,
+ .write = proc_file_write,
+};
+
+/* buffer size is one page but our output routines use some slack for overruns */
+#define PROC_BLOCK_SIZE (PAGE_SIZE - 1024)
+
+static ssize_t
+proc_file_read(struct file *file, char __user *buf, size_t nbytes,
+ loff_t *ppos)
+{
+ struct inode * inode = file->f_dentry->d_inode;
+ char *page;
+ ssize_t retval=0;
+ int eof=0;
+ ssize_t n, count;
+ char *start;
+ struct proc_dir_entry * dp;
+
+ dp = PDE(inode);
+ if (!(page = (char*) __get_free_page(GFP_KERNEL)))
+ return -ENOMEM;
+
+ while ((nbytes > 0) && !eof) {
+ count = min_t(size_t, PROC_BLOCK_SIZE, nbytes);
+
+ start = NULL;
+ if (dp->get_info) {
+ /* Handle old net routines */
+ n = dp->get_info(page, &start, *ppos, count);
+ if (n < count)
+ eof = 1;
+ } else if (dp->read_proc) {
+ /*
+ * How to be a proc read function
+ * ------------------------------
+ * Prototype:
+ * int f(char *buffer, char **start, off_t offset,
+ * int count, int *peof, void *dat)
+ *
+ * Assume that the buffer is "count" bytes in size.
+ *
+ * If you know you have supplied all the data you
+ * have, set *peof.
+ *
+ * You have three ways to return data:
+ * 0) Leave *start = NULL. (This is the default.)
+ * Put the data of the requested offset at that
+ * offset within the buffer. Return the number (n)
+ * of bytes there are from the beginning of the
+ * buffer up to the last byte of data. If the
+ * number of supplied bytes (= n - offset) is
+ * greater than zero and you didn't signal eof
+ * and the reader is prepared to take more data
+ * you will be called again with the requested
+ * offset advanced by the number of bytes
+ * absorbed. This interface is useful for files
+ * no larger than the buffer.
+ * 1) Set *start = an unsigned long value less than
+ * the buffer address but greater than zero.
+ * Put the data of the requested offset at the
+ * beginning of the buffer. Return the number of
+ * bytes of data placed there. If this number is
+ * greater than zero and you didn't signal eof
+ * and the reader is prepared to take more data
+ * you will be called again with the requested
+ * offset advanced by *start. This interface is
+ * useful when you have a large file consisting
+ * of a series of blocks which you want to count
+ * and return as wholes.
+ * (Hack by Paul.Russell@rustcorp.com.au)
+ * 2) Set *start = an address within the buffer.
+ * Put the data of the requested offset at *start.
+ * Return the number of bytes of data placed there.
+ * If this number is greater than zero and you
+ * didn't signal eof and the reader is prepared to
+ * take more data you will be called again with the
+ * requested offset advanced by the number of bytes
+ * absorbed.
+ */
+ n = dp->read_proc(page, &start, *ppos,
+ count, &eof, dp->data);
+ } else
+ break;
+
+ if (n == 0) /* end of file */
+ break;
+ if (n < 0) { /* error */
+ if (retval == 0)
+ retval = n;
+ break;
+ }
+
+ if (start == NULL) {
+ if (n > PAGE_SIZE) {
+ printk(KERN_ERR
+ "proc_file_read: Apparent buffer overflow!\n");
+ n = PAGE_SIZE;
+ }
+ n -= *ppos;
+ if (n <= 0)
+ break;
+ if (n > count)
+ n = count;
+ start = page + *ppos;
+ } else if (start < page) {
+ if (n > PAGE_SIZE) {
+ printk(KERN_ERR
+ "proc_file_read: Apparent buffer overflow!\n");
+ n = PAGE_SIZE;
+ }
+ if (n > count) {
+ /*
+ * Don't reduce n because doing so might
+ * cut off part of a data block.
+ */
+ printk(KERN_WARNING
+ "proc_file_read: Read count exceeded\n");
+ }
+ } else /* start >= page */ {
+ unsigned long startoff = (unsigned long)(start - page);
+ if (n > (PAGE_SIZE - startoff)) {
+ printk(KERN_ERR
+ "proc_file_read: Apparent buffer overflow!\n");
+ n = PAGE_SIZE - startoff;
+ }
+ if (n > count)
+ n = count;
+ }
+
+ n -= copy_to_user(buf, start < page ? page : start, n);
+ if (n == 0) {
+ if (retval == 0)
+ retval = -EFAULT;
+ break;
+ }
+
+ *ppos += start < page ? (unsigned long)start : n;
+ nbytes -= n;
+ buf += n;
+ retval += n;
+ }
+ free_page((unsigned long) page);
+ return retval;
+}
+
+static ssize_t
+proc_file_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct inode *inode = file->f_dentry->d_inode;
+ struct proc_dir_entry * dp;
+
+ dp = PDE(inode);
+
+ if (!dp->write_proc)
+ return -EIO;
+
+ /* FIXME: does this routine need ppos? probably... */
+ return dp->write_proc(file, buffer, count, dp->data);
+}
+
+
+static loff_t
+proc_file_lseek(struct file *file, loff_t offset, int orig)
+{
+ lock_kernel();
+
+ switch (orig) {
+ case 0:
+ if (offset < 0)
+ goto out;
+ file->f_pos = offset;
+ unlock_kernel();
+ return(file->f_pos);
+ case 1:
+ if (offset + file->f_pos < 0)
+ goto out;
+ file->f_pos += offset;
+ unlock_kernel();
+ return(file->f_pos);
+ case 2:
+ goto out;
+ default:
+ goto out;
+ }
+
+out:
+ unlock_kernel();
+ return -EINVAL;
+}
+
+static int proc_notify_change(struct dentry *dentry, struct iattr *iattr)
+{
+ struct inode *inode = dentry->d_inode;
+ struct proc_dir_entry *de = PDE(inode);
+ int error;
+
+ error = inode_change_ok(inode, iattr);
+ if (error)
+ goto out;
+
+ error = inode_setattr(inode, iattr);
+ if (error)
+ goto out;
+
+ de->uid = inode->i_uid;
+ de->gid = inode->i_gid;
+ de->mode = inode->i_mode;
+out:
+ return error;
+}
+
+static struct inode_operations proc_file_inode_operations = {
+ .setattr = proc_notify_change,
+};
+
+/*
+ * This function parses a name such as "tty/driver/serial", and
+ * returns the struct proc_dir_entry for "/proc/tty/driver", and
+ * returns "serial" in residual.
+ */
+static int xlate_proc_name(const char *name,
+ struct proc_dir_entry **ret, const char **residual)
+{
+ const char *cp = name, *next;
+ struct proc_dir_entry *de;
+ int len;
+
+ de = &proc_root;
+ while (1) {
+ next = strchr(cp, '/');
+ if (!next)
+ break;
+
+ len = next - cp;
+ for (de = de->subdir; de ; de = de->next) {
+ if (proc_match(len, cp, de))
+ break;
+ }
+ if (!de)
+ return -ENOENT;
+ cp += len + 1;
+ }
+ *residual = cp;
+ *ret = de;
+ return 0;
+}
+
+static DEFINE_IDR(proc_inum_idr);
+static DEFINE_SPINLOCK(proc_inum_lock); /* protects the above */
+
+#define PROC_DYNAMIC_FIRST 0xF0000000UL
+
+/*
+ * Return an inode number between PROC_DYNAMIC_FIRST and
+ * 0xffffffff, or zero on failure.
+ */
+static unsigned int get_inode_number(void)
+{
+ int i, inum = 0;
+ int error;
+
+retry:
+ if (idr_pre_get(&proc_inum_idr, GFP_KERNEL) == 0)
+ return 0;
+
+ spin_lock(&proc_inum_lock);
+ error = idr_get_new(&proc_inum_idr, NULL, &i);
+ spin_unlock(&proc_inum_lock);
+ if (error == -EAGAIN)
+ goto retry;
+ else if (error)
+ return 0;
+
+ inum = (i & MAX_ID_MASK) + PROC_DYNAMIC_FIRST;
+
+ /* inum will never be more than 0xf0ffffff, so no check
+ * for overflow.
+ */
+
+ return inum;
+}
+
+static void release_inode_number(unsigned int inum)
+{
+ int id = (inum - PROC_DYNAMIC_FIRST) | ~MAX_ID_MASK;
+
+ spin_lock(&proc_inum_lock);
+ idr_remove(&proc_inum_idr, id);
+ spin_unlock(&proc_inum_lock);
+}
+
+static int proc_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+ nd_set_link(nd, PDE(dentry->d_inode)->data);
+ return 0;
+}
+
+static struct inode_operations proc_link_inode_operations = {
+ .readlink = generic_readlink,
+ .follow_link = proc_follow_link,
+};
+
+/*
+ * As some entries in /proc are volatile, we want to
+ * get rid of unused dentries. This could be made
+ * smarter: we could keep a "volatile" flag in the
+ * inode to indicate which ones to keep.
+ */
+static int proc_delete_dentry(struct dentry * dentry)
+{
+ return 1;
+}
+
+static struct dentry_operations proc_dentry_operations =
+{
+ .d_delete = proc_delete_dentry,
+};
+
+/*
+ * Don't create negative dentries here, return -ENOENT by hand
+ * instead.
+ */
+struct dentry *proc_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
+{
+ struct inode *inode = NULL;
+ struct proc_dir_entry * de;
+ int error = -ENOENT;
+
+ lock_kernel();
+ de = PDE(dir);
+ if (de) {
+ for (de = de->subdir; de ; de = de->next) {
+ if (de->namelen != dentry->d_name.len)
+ continue;
+ if (!memcmp(dentry->d_name.name, de->name, de->namelen)) {
+ unsigned int ino = de->low_ino;
+
+ error = -EINVAL;
+ inode = proc_get_inode(dir->i_sb, ino, de);
+ break;
+ }
+ }
+ }
+ unlock_kernel();
+
+ if (inode) {
+ dentry->d_op = &proc_dentry_operations;
+ d_add(dentry, inode);
+ return NULL;
+ }
+ return ERR_PTR(error);
+}
+
+/*
+ * This returns non-zero if at EOF, so that the /proc
+ * root directory can use this and check if it should
+ * continue with the <pid> entries..
+ *
+ * Note that the VFS-layer doesn't care about the return
+ * value of the readdir() call, as long as it's non-negative
+ * for success..
+ */
+int proc_readdir(struct file * filp,
+ void * dirent, filldir_t filldir)
+{
+ struct proc_dir_entry * de;
+ unsigned int ino;
+ int i;
+ struct inode *inode = filp->f_dentry->d_inode;
+ int ret = 0;
+
+ lock_kernel();
+
+ ino = inode->i_ino;
+ de = PDE(inode);
+ if (!de) {
+ ret = -EINVAL;
+ goto out;
+ }
+ i = filp->f_pos;
+ switch (i) {
+ case 0:
+ if (filldir(dirent, ".", 1, i, ino, DT_DIR) < 0)
+ goto out;
+ i++;
+ filp->f_pos++;
+ /* fall through */
+ case 1:
+ if (filldir(dirent, "..", 2, i,
+ parent_ino(filp->f_dentry),
+ DT_DIR) < 0)
+ goto out;
+ i++;
+ filp->f_pos++;
+ /* fall through */
+ default:
+ de = de->subdir;
+ i -= 2;
+ for (;;) {
+ if (!de) {
+ ret = 1;
+ goto out;
+ }
+ if (!i)
+ break;
+ de = de->next;
+ i--;
+ }
+
+ do {
+ if (filldir(dirent, de->name, de->namelen, filp->f_pos,
+ de->low_ino, de->mode >> 12) < 0)
+ goto out;
+ filp->f_pos++;
+ de = de->next;
+ } while (de);
+ }
+ ret = 1;
+out: unlock_kernel();
+ return ret;
+}
+
+/*
+ * These are the generic /proc directory operations. They
+ * use the in-memory "struct proc_dir_entry" tree to parse
+ * the /proc directory.
+ */
+static struct file_operations proc_dir_operations = {
+ .read = generic_read_dir,
+ .readdir = proc_readdir,
+};
+
+/*
+ * proc directories can do almost nothing..
+ */
+static struct inode_operations proc_dir_inode_operations = {
+ .lookup = proc_lookup,
+ .setattr = proc_notify_change,
+};
+
+static int proc_register(struct proc_dir_entry * dir, struct proc_dir_entry * dp)
+{
+ unsigned int i;
+
+ i = get_inode_number();
+ if (i == 0)
+ return -EAGAIN;
+ dp->low_ino = i;
+ dp->next = dir->subdir;
+ dp->parent = dir;
+ dir->subdir = dp;
+ if (S_ISDIR(dp->mode)) {
+ if (dp->proc_iops == NULL) {
+ dp->proc_fops = &proc_dir_operations;
+ dp->proc_iops = &proc_dir_inode_operations;
+ }
+ dir->nlink++;
+ } else if (S_ISLNK(dp->mode)) {
+ if (dp->proc_iops == NULL)
+ dp->proc_iops = &proc_link_inode_operations;
+ } else if (S_ISREG(dp->mode)) {
+ if (dp->proc_fops == NULL)
+ dp->proc_fops = &proc_file_operations;
+ if (dp->proc_iops == NULL)
+ dp->proc_iops = &proc_file_inode_operations;
+ }
+ return 0;
+}
+
+/*
+ * Kill an inode that got unregistered..
+ */
+static void proc_kill_inodes(struct proc_dir_entry *de)
+{
+ struct list_head *p;
+ struct super_block *sb = proc_mnt->mnt_sb;
+
+ /*
+ * Actually it's a partial revoke().
+ */
+ file_list_lock();
+ list_for_each(p, &sb->s_files) {
+ struct file * filp = list_entry(p, struct file, f_list);
+ struct dentry * dentry = filp->f_dentry;
+ struct inode * inode;
+ struct file_operations *fops;
+
+ if (dentry->d_op != &proc_dentry_operations)
+ continue;
+ inode = dentry->d_inode;
+ if (PDE(inode) != de)
+ continue;
+ fops = filp->f_op;
+ filp->f_op = NULL;
+ fops_put(fops);
+ }
+ file_list_unlock();
+}
+
+static struct proc_dir_entry *proc_create(struct proc_dir_entry **parent,
+ const char *name,
+ mode_t mode,
+ nlink_t nlink)
+{
+ struct proc_dir_entry *ent = NULL;
+ const char *fn = name;
+ int len;
+
+ /* make sure name is valid */
+ if (!name || !strlen(name)) goto out;
+
+ if (!(*parent) && xlate_proc_name(name, parent, &fn) != 0)
+ goto out;
+
+ /* At this point there must not be any '/' characters beyond *fn */
+ if (strchr(fn, '/'))
+ goto out;
+
+ len = strlen(fn);
+
+ ent = kmalloc(sizeof(struct proc_dir_entry) + len + 1, GFP_KERNEL);
+ if (!ent) goto out;
+
+ memset(ent, 0, sizeof(struct proc_dir_entry));
+ memcpy(((char *) ent) + sizeof(struct proc_dir_entry), fn, len + 1);
+ ent->name = ((char *) ent) + sizeof(*ent);
+ ent->namelen = len;
+ ent->mode = mode;
+ ent->nlink = nlink;
+ out:
+ return ent;
+}
+
+struct proc_dir_entry *proc_symlink(const char *name,
+ struct proc_dir_entry *parent, const char *dest)
+{
+ struct proc_dir_entry *ent;
+
+ ent = proc_create(&parent,name,
+ (S_IFLNK | S_IRUGO | S_IWUGO | S_IXUGO),1);
+
+ if (ent) {
+ ent->data = kmalloc((ent->size=strlen(dest))+1, GFP_KERNEL);
+ if (ent->data) {
+ strcpy((char*)ent->data,dest);
+ if (proc_register(parent, ent) < 0) {
+ kfree(ent->data);
+ kfree(ent);
+ ent = NULL;
+ }
+ } else {
+ kfree(ent);
+ ent = NULL;
+ }
+ }
+ return ent;
+}
+
+struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode,
+ struct proc_dir_entry *parent)
+{
+ struct proc_dir_entry *ent;
+
+ ent = proc_create(&parent, name, S_IFDIR | mode, 2);
+ if (ent) {
+ ent->proc_fops = &proc_dir_operations;
+ ent->proc_iops = &proc_dir_inode_operations;
+
+ if (proc_register(parent, ent) < 0) {
+ kfree(ent);
+ ent = NULL;
+ }
+ }
+ return ent;
+}
+
+struct proc_dir_entry *proc_mkdir(const char *name,
+ struct proc_dir_entry *parent)
+{
+ return proc_mkdir_mode(name, S_IRUGO | S_IXUGO, parent);
+}
+
+struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
+ struct proc_dir_entry *parent)
+{
+ struct proc_dir_entry *ent;
+ nlink_t nlink;
+
+ if (S_ISDIR(mode)) {
+ if ((mode & S_IALLUGO) == 0)
+ mode |= S_IRUGO | S_IXUGO;
+ nlink = 2;
+ } else {
+ if ((mode & S_IFMT) == 0)
+ mode |= S_IFREG;
+ if ((mode & S_IALLUGO) == 0)
+ mode |= S_IRUGO;
+ nlink = 1;
+ }
+
+ ent = proc_create(&parent,name,mode,nlink);
+ if (ent) {
+ if (S_ISDIR(mode)) {
+ ent->proc_fops = &proc_dir_operations;
+ ent->proc_iops = &proc_dir_inode_operations;
+ }
+ if (proc_register(parent, ent) < 0) {
+ kfree(ent);
+ ent = NULL;
+ }
+ }
+ return ent;
+}
+
+void free_proc_entry(struct proc_dir_entry *de)
+{
+ unsigned int ino = de->low_ino;
+
+ if (ino < PROC_DYNAMIC_FIRST)
+ return;
+
+ release_inode_number(ino);
+
+ if (S_ISLNK(de->mode) && de->data)
+ kfree(de->data);
+ kfree(de);
+}
+
+/*
+ * Remove a /proc entry and free it if it's not currently in use.
+ * If it is in use, we set the 'deleted' flag.
+ */
+void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
+{
+ struct proc_dir_entry **p;
+ struct proc_dir_entry *de;
+ const char *fn = name;
+ int len;
+
+ if (!parent && xlate_proc_name(name, &parent, &fn) != 0)
+ goto out;
+ len = strlen(fn);
+ for (p = &parent->subdir; *p; p=&(*p)->next ) {
+ if (!proc_match(len, fn, *p))
+ continue;
+ de = *p;
+ *p = de->next;
+ de->next = NULL;
+ if (S_ISDIR(de->mode))
+ parent->nlink--;
+ proc_kill_inodes(de);
+ de->nlink = 0;
+ WARN_ON(de->subdir);
+ if (!atomic_read(&de->count))
+ free_proc_entry(de);
+ else {
+ de->deleted = 1;
+ printk("remove_proc_entry: %s/%s busy, count=%d\n",
+ parent->name, de->name, atomic_read(&de->count));
+ }
+ break;
+ }
+out:
+ return;
+}
diff --git a/fs/proc/inode-alloc.txt b/fs/proc/inode-alloc.txt
new file mode 100644
index 00000000000..77212f938c2
--- /dev/null
+++ b/fs/proc/inode-alloc.txt
@@ -0,0 +1,14 @@
+Current inode allocations in the proc-fs (hex-numbers):
+
+ 00000000 reserved
+ 00000001-00000fff static entries (goners)
+ 001 root-ino
+
+ 00001000-00001fff unused
+ 0001xxxx-7fffxxxx pid-dir entries for pid 1-7fff
+ 80000000-efffffff unused
+ f0000000-ffffffff dynamic entries
+
+Goal:
+ a) once we'll split the thing into several virtual filesystems we
+ will get rid of magical ranges (and this file, BTW).
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
new file mode 100644
index 00000000000..133c2868510
--- /dev/null
+++ b/fs/proc/inode.c
@@ -0,0 +1,218 @@
+/*
+ * linux/fs/proc/inode.c
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ */
+
+#include <linux/time.h>
+#include <linux/proc_fs.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/stat.h>
+#include <linux/file.h>
+#include <linux/limits.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/smp_lock.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+extern void free_proc_entry(struct proc_dir_entry *);
+
+static inline struct proc_dir_entry * de_get(struct proc_dir_entry *de)
+{
+ if (de)
+ atomic_inc(&de->count);
+ return de;
+}
+
+/*
+ * Decrements the use count and checks for deferred deletion.
+ */
+static void de_put(struct proc_dir_entry *de)
+{
+ if (de) {
+ lock_kernel();
+ if (!atomic_read(&de->count)) {
+ printk("de_put: entry %s already free!\n", de->name);
+ unlock_kernel();
+ return;
+ }
+
+ if (atomic_dec_and_test(&de->count)) {
+ if (de->deleted) {
+ printk("de_put: deferred delete of %s\n",
+ de->name);
+ free_proc_entry(de);
+ }
+ }
+ unlock_kernel();
+ }
+}
+
+/*
+ * Decrement the use count of the proc_dir_entry.
+ */
+static void proc_delete_inode(struct inode *inode)
+{
+ struct proc_dir_entry *de;
+ struct task_struct *tsk;
+
+ /* Let go of any associated process */
+ tsk = PROC_I(inode)->task;
+ if (tsk)
+ put_task_struct(tsk);
+
+ /* Let go of any associated proc directory entry */
+ de = PROC_I(inode)->pde;
+ if (de) {
+ if (de->owner)
+ module_put(de->owner);
+ de_put(de);
+ }
+ clear_inode(inode);
+}
+
+struct vfsmount *proc_mnt;
+
+static void proc_read_inode(struct inode * inode)
+{
+ inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
+}
+
+static kmem_cache_t * proc_inode_cachep;
+
+static struct inode *proc_alloc_inode(struct super_block *sb)
+{
+ struct proc_inode *ei;
+ struct inode *inode;
+
+ ei = (struct proc_inode *)kmem_cache_alloc(proc_inode_cachep, SLAB_KERNEL);
+ if (!ei)
+ return NULL;
+ ei->task = NULL;
+ ei->type = 0;
+ ei->op.proc_get_link = NULL;
+ ei->pde = NULL;
+ inode = &ei->vfs_inode;
+ inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
+ return inode;
+}
+
+static void proc_destroy_inode(struct inode *inode)
+{
+ kmem_cache_free(proc_inode_cachep, PROC_I(inode));
+}
+
+static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
+{
+ struct proc_inode *ei = (struct proc_inode *) foo;
+
+ if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
+ SLAB_CTOR_CONSTRUCTOR)
+ inode_init_once(&ei->vfs_inode);
+}
+
+int __init proc_init_inodecache(void)
+{
+ proc_inode_cachep = kmem_cache_create("proc_inode_cache",
+ sizeof(struct proc_inode),
+ 0, SLAB_RECLAIM_ACCOUNT,
+ init_once, NULL);
+ if (proc_inode_cachep == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+static int proc_remount(struct super_block *sb, int *flags, char *data)
+{
+ *flags |= MS_NODIRATIME;
+ return 0;
+}
+
+static struct super_operations proc_sops = {
+ .alloc_inode = proc_alloc_inode,
+ .destroy_inode = proc_destroy_inode,
+ .read_inode = proc_read_inode,
+ .drop_inode = generic_delete_inode,
+ .delete_inode = proc_delete_inode,
+ .statfs = simple_statfs,
+ .remount_fs = proc_remount,
+};
+
+struct inode *proc_get_inode(struct super_block *sb, unsigned int ino,
+ struct proc_dir_entry *de)
+{
+ struct inode * inode;
+
+ /*
+ * Increment the use count so the dir entry can't disappear.
+ */
+ de_get(de);
+
+ WARN_ON(de && de->deleted);
+
+ inode = iget(sb, ino);
+ if (!inode)
+ goto out_fail;
+
+ PROC_I(inode)->pde = de;
+ if (de) {
+ if (de->mode) {
+ inode->i_mode = de->mode;
+ inode->i_uid = de->uid;
+ inode->i_gid = de->gid;
+ }
+ if (de->size)
+ inode->i_size = de->size;
+ if (de->nlink)
+ inode->i_nlink = de->nlink;
+ if (!try_module_get(de->owner))
+ goto out_fail;
+ if (de->proc_iops)
+ inode->i_op = de->proc_iops;
+ if (de->proc_fops)
+ inode->i_fop = de->proc_fops;
+ }
+
+out:
+ return inode;
+
+out_fail:
+ de_put(de);
+ goto out;
+}
+
+int proc_fill_super(struct super_block *s, void *data, int silent)
+{
+ struct inode * root_inode;
+
+ s->s_flags |= MS_NODIRATIME;
+ s->s_blocksize = 1024;
+ s->s_blocksize_bits = 10;
+ s->s_magic = PROC_SUPER_MAGIC;
+ s->s_op = &proc_sops;
+ s->s_time_gran = 1;
+
+ root_inode = proc_get_inode(s, PROC_ROOT_INO, &proc_root);
+ if (!root_inode)
+ goto out_no_root;
+ /*
+ * Fixup the root inode's nlink value
+ */
+ root_inode->i_nlink += nr_processes();
+ root_inode->i_uid = 0;
+ root_inode->i_gid = 0;
+ s->s_root = d_alloc_root(root_inode);
+ if (!s->s_root)
+ goto out_no_root;
+ return 0;
+
+out_no_root:
+ printk("proc_read_super: get root inode failed\n");
+ iput(root_inode);
+ return -ENOMEM;
+}
+MODULE_LICENSE("GPL");
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
new file mode 100644
index 00000000000..3e55198f980
--- /dev/null
+++ b/fs/proc/internal.h
@@ -0,0 +1,48 @@
+/* internal.h: internal procfs definitions
+ *
+ * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/proc_fs.h>
+
+struct vmalloc_info {
+ unsigned long used;
+ unsigned long largest_chunk;
+};
+
+#ifdef CONFIG_MMU
+#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
+extern void get_vmalloc_info(struct vmalloc_info *vmi);
+#else
+
+#define VMALLOC_TOTAL 0UL
+#define get_vmalloc_info(vmi) \
+do { \
+ (vmi)->used = 0; \
+ (vmi)->largest_chunk = 0; \
+} while(0)
+
+#endif
+
+extern void create_seq_entry(char *name, mode_t mode, struct file_operations *f);
+extern int proc_exe_link(struct inode *, struct dentry **, struct vfsmount **);
+extern int proc_tid_stat(struct task_struct *, char *);
+extern int proc_tgid_stat(struct task_struct *, char *);
+extern int proc_pid_status(struct task_struct *, char *);
+extern int proc_pid_statm(struct task_struct *, char *);
+
+static inline struct task_struct *proc_task(struct inode *inode)
+{
+ return PROC_I(inode)->task;
+}
+
+static inline int proc_type(struct inode *inode)
+{
+ return PROC_I(inode)->type;
+}
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
new file mode 100644
index 00000000000..1c7da988fcc
--- /dev/null
+++ b/fs/proc/kcore.c
@@ -0,0 +1,404 @@
+/*
+ * fs/proc/kcore.c kernel ELF core dumper
+ *
+ * Modelled on fs/exec.c:aout_core_dump()
+ * Jeremy Fitzhardinge <jeremy@sw.oz.au>
+ * ELF version written by David Howells <David.Howells@nexor.co.uk>
+ * Modified and incorporated into 2.3.x by Tigran Aivazian <tigran@veritas.com>
+ * Support to dump vmalloc'd areas (ELF only), Tigran Aivazian <tigran@veritas.com>
+ * Safe accesses to vmalloc/direct-mapped discontiguous areas, Kanoj Sarcar <kanoj@sgi.com>
+ */
+
+#include <linux/config.h>
+#include <linux/mm.h>
+#include <linux/proc_fs.h>
+#include <linux/user.h>
+#include <linux/a.out.h>
+#include <linux/elf.h>
+#include <linux/elfcore.h>
+#include <linux/vmalloc.h>
+#include <linux/highmem.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+
+static int open_kcore(struct inode * inode, struct file * filp)
+{
+ return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
+}
+
+static ssize_t read_kcore(struct file *, char __user *, size_t, loff_t *);
+
+struct file_operations proc_kcore_operations = {
+ .read = read_kcore,
+ .open = open_kcore,
+};
+
+#ifndef kc_vaddr_to_offset
+#define kc_vaddr_to_offset(v) ((v) - PAGE_OFFSET)
+#endif
+#ifndef kc_offset_to_vaddr
+#define kc_offset_to_vaddr(o) ((o) + PAGE_OFFSET)
+#endif
+
+#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
+
+/* An ELF note in memory */
+struct memelfnote
+{
+ const char *name;
+ int type;
+ unsigned int datasz;
+ void *data;
+};
+
+static struct kcore_list *kclist;
+static DEFINE_RWLOCK(kclist_lock);
+
+void
+kclist_add(struct kcore_list *new, void *addr, size_t size)
+{
+ new->addr = (unsigned long)addr;
+ new->size = size;
+
+ write_lock(&kclist_lock);
+ new->next = kclist;
+ kclist = new;
+ write_unlock(&kclist_lock);
+}
+
+static size_t get_kcore_size(int *nphdr, size_t *elf_buflen)
+{
+ size_t try, size;
+ struct kcore_list *m;
+
+ *nphdr = 1; /* PT_NOTE */
+ size = 0;
+
+ for (m=kclist; m; m=m->next) {
+ try = kc_vaddr_to_offset((size_t)m->addr + m->size);
+ if (try > size)
+ size = try;
+ *nphdr = *nphdr + 1;
+ }
+ *elf_buflen = sizeof(struct elfhdr) +
+ (*nphdr + 2)*sizeof(struct elf_phdr) +
+ 3 * (sizeof(struct elf_note) + 4) +
+ sizeof(struct elf_prstatus) +
+ sizeof(struct elf_prpsinfo) +
+ sizeof(struct task_struct);
+ *elf_buflen = PAGE_ALIGN(*elf_buflen);
+ return size + *elf_buflen;
+}
+
+
+/*****************************************************************************/
+/*
+ * determine size of ELF note
+ */
+static int notesize(struct memelfnote *en)
+{
+ int sz;
+
+ sz = sizeof(struct elf_note);
+ sz += roundup(strlen(en->name), 4);
+ sz += roundup(en->datasz, 4);
+
+ return sz;
+} /* end notesize() */
+
+/*****************************************************************************/
+/*
+ * store a note in the header buffer
+ */
+static char *storenote(struct memelfnote *men, char *bufp)
+{
+ struct elf_note en;
+
+#define DUMP_WRITE(addr,nr) do { memcpy(bufp,addr,nr); bufp += nr; } while(0)
+
+ en.n_namesz = strlen(men->name);
+ en.n_descsz = men->datasz;
+ en.n_type = men->type;
+
+ DUMP_WRITE(&en, sizeof(en));
+ DUMP_WRITE(men->name, en.n_namesz);
+
+ /* XXX - cast from long long to long to avoid need for libgcc.a */
+ bufp = (char*) roundup((unsigned long)bufp,4);
+ DUMP_WRITE(men->data, men->datasz);
+ bufp = (char*) roundup((unsigned long)bufp,4);
+
+#undef DUMP_WRITE
+
+ return bufp;
+} /* end storenote() */
+
+/*
+ * store an ELF coredump header in the supplied buffer
+ * nphdr is the number of elf_phdr to insert
+ */
+static void elf_kcore_store_hdr(char *bufp, int nphdr, int dataoff)
+{
+ struct elf_prstatus prstatus; /* NT_PRSTATUS */
+ struct elf_prpsinfo prpsinfo; /* NT_PRPSINFO */
+ struct elf_phdr *nhdr, *phdr;
+ struct elfhdr *elf;
+ struct memelfnote notes[3];
+ off_t offset = 0;
+ struct kcore_list *m;
+
+ /* setup ELF header */
+ elf = (struct elfhdr *) bufp;
+ bufp += sizeof(struct elfhdr);
+ offset += sizeof(struct elfhdr);
+ memcpy(elf->e_ident, ELFMAG, SELFMAG);
+ elf->e_ident[EI_CLASS] = ELF_CLASS;
+ elf->e_ident[EI_DATA] = ELF_DATA;
+ elf->e_ident[EI_VERSION]= EV_CURRENT;
+ elf->e_ident[EI_OSABI] = ELF_OSABI;
+ memset(elf->e_ident+EI_PAD, 0, EI_NIDENT-EI_PAD);
+ elf->e_type = ET_CORE;
+ elf->e_machine = ELF_ARCH;
+ elf->e_version = EV_CURRENT;
+ elf->e_entry = 0;
+ elf->e_phoff = sizeof(struct elfhdr);
+ elf->e_shoff = 0;
+#if defined(CONFIG_H8300)
+ elf->e_flags = ELF_FLAGS;
+#else
+ elf->e_flags = 0;
+#endif
+ elf->e_ehsize = sizeof(struct elfhdr);
+ elf->e_phentsize= sizeof(struct elf_phdr);
+ elf->e_phnum = nphdr;
+ elf->e_shentsize= 0;
+ elf->e_shnum = 0;
+ elf->e_shstrndx = 0;
+
+ /* setup ELF PT_NOTE program header */
+ nhdr = (struct elf_phdr *) bufp;
+ bufp += sizeof(struct elf_phdr);
+ offset += sizeof(struct elf_phdr);
+ nhdr->p_type = PT_NOTE;
+ nhdr->p_offset = 0;
+ nhdr->p_vaddr = 0;
+ nhdr->p_paddr = 0;
+ nhdr->p_filesz = 0;
+ nhdr->p_memsz = 0;
+ nhdr->p_flags = 0;
+ nhdr->p_align = 0;
+
+ /* setup ELF PT_LOAD program header for every area */
+ for (m=kclist; m; m=m->next) {
+ phdr = (struct elf_phdr *) bufp;
+ bufp += sizeof(struct elf_phdr);
+ offset += sizeof(struct elf_phdr);
+
+ phdr->p_type = PT_LOAD;
+ phdr->p_flags = PF_R|PF_W|PF_X;
+ phdr->p_offset = kc_vaddr_to_offset(m->addr) + dataoff;
+ phdr->p_vaddr = (size_t)m->addr;
+ phdr->p_paddr = 0;
+ phdr->p_filesz = phdr->p_memsz = m->size;
+ phdr->p_align = PAGE_SIZE;
+ }
+
+ /*
+ * Set up the notes in similar form to SVR4 core dumps made
+ * with info from their /proc.
+ */
+ nhdr->p_offset = offset;
+
+ /* set up the process status */
+ notes[0].name = "CORE";
+ notes[0].type = NT_PRSTATUS;
+ notes[0].datasz = sizeof(struct elf_prstatus);
+ notes[0].data = &prstatus;
+
+ memset(&prstatus, 0, sizeof(struct elf_prstatus));
+
+ nhdr->p_filesz = notesize(&notes[0]);
+ bufp = storenote(&notes[0], bufp);
+
+ /* set up the process info */
+ notes[1].name = "CORE";
+ notes[1].type = NT_PRPSINFO;
+ notes[1].datasz = sizeof(struct elf_prpsinfo);
+ notes[1].data = &prpsinfo;
+
+ memset(&prpsinfo, 0, sizeof(struct elf_prpsinfo));
+ prpsinfo.pr_state = 0;
+ prpsinfo.pr_sname = 'R';
+ prpsinfo.pr_zomb = 0;
+
+ strcpy(prpsinfo.pr_fname, "vmlinux");
+ strncpy(prpsinfo.pr_psargs, saved_command_line, ELF_PRARGSZ);
+
+ nhdr->p_filesz += notesize(&notes[1]);
+ bufp = storenote(&notes[1], bufp);
+
+ /* set up the task structure */
+ notes[2].name = "CORE";
+ notes[2].type = NT_TASKSTRUCT;
+ notes[2].datasz = sizeof(struct task_struct);
+ notes[2].data = current;
+
+ nhdr->p_filesz += notesize(&notes[2]);
+ bufp = storenote(&notes[2], bufp);
+
+} /* end elf_kcore_store_hdr() */
+
+/*****************************************************************************/
+/*
+ * read from the ELF header and then kernel memory
+ */
+static ssize_t
+read_kcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos)
+{
+ ssize_t acc = 0;
+ size_t size, tsz;
+ size_t elf_buflen;
+ int nphdr;
+ unsigned long start;
+
+ read_lock(&kclist_lock);
+ proc_root_kcore->size = size = get_kcore_size(&nphdr, &elf_buflen);
+ if (buflen == 0 || *fpos >= size) {
+ read_unlock(&kclist_lock);
+ return 0;
+ }
+
+ /* trim buflen to not go beyond EOF */
+ if (buflen > size - *fpos)
+ buflen = size - *fpos;
+
+ /* construct an ELF core header if we'll need some of it */
+ if (*fpos < elf_buflen) {
+ char * elf_buf;
+
+ tsz = elf_buflen - *fpos;
+ if (buflen < tsz)
+ tsz = buflen;
+ elf_buf = kmalloc(elf_buflen, GFP_ATOMIC);
+ if (!elf_buf) {
+ read_unlock(&kclist_lock);
+ return -ENOMEM;
+ }
+ memset(elf_buf, 0, elf_buflen);
+ elf_kcore_store_hdr(elf_buf, nphdr, elf_buflen);
+ read_unlock(&kclist_lock);
+ if (copy_to_user(buffer, elf_buf + *fpos, tsz)) {
+ kfree(elf_buf);
+ return -EFAULT;
+ }
+ kfree(elf_buf);
+ buflen -= tsz;
+ *fpos += tsz;
+ buffer += tsz;
+ acc += tsz;
+
+ /* leave now if filled buffer already */
+ if (buflen == 0)
+ return acc;
+ } else
+ read_unlock(&kclist_lock);
+
+ /*
+ * Check to see if our file offset matches with any of
+ * the addresses in the elf_phdr on our list.
+ */
+ start = kc_offset_to_vaddr(*fpos - elf_buflen);
+ if ((tsz = (PAGE_SIZE - (start & ~PAGE_MASK))) > buflen)
+ tsz = buflen;
+
+ while (buflen) {
+ struct kcore_list *m;
+
+ read_lock(&kclist_lock);
+ for (m=kclist; m; m=m->next) {
+ if (start >= m->addr && start < (m->addr+m->size))
+ break;
+ }
+ read_unlock(&kclist_lock);
+
+ if (m == NULL) {
+ if (clear_user(buffer, tsz))
+ return -EFAULT;
+ } else if ((start >= VMALLOC_START) && (start < VMALLOC_END)) {
+ char * elf_buf;
+ struct vm_struct *m;
+ unsigned long curstart = start;
+ unsigned long cursize = tsz;
+
+ elf_buf = kmalloc(tsz, GFP_KERNEL);
+ if (!elf_buf)
+ return -ENOMEM;
+ memset(elf_buf, 0, tsz);
+
+ read_lock(&vmlist_lock);
+ for (m=vmlist; m && cursize; m=m->next) {
+ unsigned long vmstart;
+ unsigned long vmsize;
+ unsigned long msize = m->size - PAGE_SIZE;
+
+ if (((unsigned long)m->addr + msize) <
+ curstart)
+ continue;
+ if ((unsigned long)m->addr > (curstart +
+ cursize))
+ break;
+ vmstart = (curstart < (unsigned long)m->addr ?
+ (unsigned long)m->addr : curstart);
+ if (((unsigned long)m->addr + msize) >
+ (curstart + cursize))
+ vmsize = curstart + cursize - vmstart;
+ else
+ vmsize = (unsigned long)m->addr +
+ msize - vmstart;
+ curstart = vmstart + vmsize;
+ cursize -= vmsize;
+ /* don't dump ioremap'd stuff! (TA) */
+ if (m->flags & VM_IOREMAP)
+ continue;
+ memcpy(elf_buf + (vmstart - start),
+ (char *)vmstart, vmsize);
+ }
+ read_unlock(&vmlist_lock);
+ if (copy_to_user(buffer, elf_buf, tsz)) {
+ kfree(elf_buf);
+ return -EFAULT;
+ }
+ kfree(elf_buf);
+ } else {
+ if (kern_addr_valid(start)) {
+ unsigned long n;
+
+ n = copy_to_user(buffer, (char *)start, tsz);
+ /*
+ * We cannot distingush between fault on source
+ * and fault on destination. When this happens
+ * we clear too and hope it will trigger the
+ * EFAULT again.
+ */
+ if (n) {
+ if (clear_user(buffer + tsz - n,
+ tsz - n))
+ return -EFAULT;
+ }
+ } else {
+ if (clear_user(buffer, tsz))
+ return -EFAULT;
+ }
+ }
+ buflen -= tsz;
+ *fpos += tsz;
+ buffer += tsz;
+ acc += tsz;
+ start += tsz;
+ tsz = (buflen > PAGE_SIZE ? PAGE_SIZE : buflen);
+ }
+
+ return acc;
+}
diff --git a/fs/proc/kmsg.c b/fs/proc/kmsg.c
new file mode 100644
index 00000000000..10d37bf2520
--- /dev/null
+++ b/fs/proc/kmsg.c
@@ -0,0 +1,55 @@
+/*
+ * linux/fs/proc/kmsg.c
+ *
+ * Copyright (C) 1992 by Linus Torvalds
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/kernel.h>
+#include <linux/poll.h>
+#include <linux/fs.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+extern wait_queue_head_t log_wait;
+
+extern int do_syslog(int type, char __user *bug, int count);
+
+static int kmsg_open(struct inode * inode, struct file * file)
+{
+ return do_syslog(1,NULL,0);
+}
+
+static int kmsg_release(struct inode * inode, struct file * file)
+{
+ (void) do_syslog(0,NULL,0);
+ return 0;
+}
+
+static ssize_t kmsg_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ if ((file->f_flags & O_NONBLOCK) && !do_syslog(9, NULL, 0))
+ return -EAGAIN;
+ return do_syslog(2, buf, count);
+}
+
+static unsigned int kmsg_poll(struct file *file, poll_table *wait)
+{
+ poll_wait(file, &log_wait, wait);
+ if (do_syslog(9, NULL, 0))
+ return POLLIN | POLLRDNORM;
+ return 0;
+}
+
+
+struct file_operations proc_kmsg_operations = {
+ .read = kmsg_read,
+ .poll = kmsg_poll,
+ .open = kmsg_open,
+ .release = kmsg_release,
+};
diff --git a/fs/proc/mmu.c b/fs/proc/mmu.c
new file mode 100644
index 00000000000..a7041038ad5
--- /dev/null
+++ b/fs/proc/mmu.c
@@ -0,0 +1,67 @@
+/* mmu.c: mmu memory info files
+ *
+ * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/mman.h>
+#include <linux/proc_fs.h>
+#include <linux/mm.h>
+#include <linux/mmzone.h>
+#include <linux/pagemap.h>
+#include <linux/swap.h>
+#include <linux/slab.h>
+#include <linux/smp.h>
+#include <linux/seq_file.h>
+#include <linux/hugetlb.h>
+#include <linux/vmalloc.h>
+#include <asm/uaccess.h>
+#include <asm/pgtable.h>
+#include <asm/tlb.h>
+#include <asm/div64.h>
+#include "internal.h"
+
+void get_vmalloc_info(struct vmalloc_info *vmi)
+{
+ struct vm_struct *vma;
+ unsigned long free_area_size;
+ unsigned long prev_end;
+
+ vmi->used = 0;
+
+ if (!vmlist) {
+ vmi->largest_chunk = VMALLOC_TOTAL;
+ }
+ else {
+ vmi->largest_chunk = 0;
+
+ prev_end = VMALLOC_START;
+
+ read_lock(&vmlist_lock);
+
+ for (vma = vmlist; vma; vma = vma->next) {
+ vmi->used += vma->size;
+
+ free_area_size = (unsigned long) vma->addr - prev_end;
+ if (vmi->largest_chunk < free_area_size)
+ vmi->largest_chunk = free_area_size;
+
+ prev_end = vma->size + (unsigned long) vma->addr;
+ }
+
+ if (VMALLOC_END - prev_end > vmi->largest_chunk)
+ vmi->largest_chunk = VMALLOC_END - prev_end;
+
+ read_unlock(&vmlist_lock);
+ }
+}
diff --git a/fs/proc/nommu.c b/fs/proc/nommu.c
new file mode 100644
index 00000000000..f3bf016d5ee
--- /dev/null
+++ b/fs/proc/nommu.c
@@ -0,0 +1,135 @@
+/* nommu.c: mmu-less memory info files
+ *
+ * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/mman.h>
+#include <linux/proc_fs.h>
+#include <linux/mm.h>
+#include <linux/mmzone.h>
+#include <linux/pagemap.h>
+#include <linux/swap.h>
+#include <linux/slab.h>
+#include <linux/smp.h>
+#include <linux/seq_file.h>
+#include <linux/hugetlb.h>
+#include <linux/vmalloc.h>
+#include <asm/uaccess.h>
+#include <asm/pgtable.h>
+#include <asm/tlb.h>
+#include <asm/div64.h>
+#include "internal.h"
+
+/*
+ * display a list of all the VMAs the kernel knows about
+ * - nommu kernals have a single flat list
+ */
+static int nommu_vma_list_show(struct seq_file *m, void *v)
+{
+ struct vm_area_struct *vma;
+ unsigned long ino = 0;
+ struct file *file;
+ dev_t dev = 0;
+ int flags, len;
+
+ vma = rb_entry((struct rb_node *) v, struct vm_area_struct, vm_rb);
+
+ flags = vma->vm_flags;
+ file = vma->vm_file;
+
+ if (file) {
+ struct inode *inode = vma->vm_file->f_dentry->d_inode;
+ dev = inode->i_sb->s_dev;
+ ino = inode->i_ino;
+ }
+
+ seq_printf(m,
+ "%08lx-%08lx %c%c%c%c %08lx %02x:%02x %lu %n",
+ vma->vm_start,
+ vma->vm_end,
+ flags & VM_READ ? 'r' : '-',
+ flags & VM_WRITE ? 'w' : '-',
+ flags & VM_EXEC ? 'x' : '-',
+ flags & VM_MAYSHARE ? flags & VM_SHARED ? 'S' : 's' : 'p',
+ vma->vm_pgoff << PAGE_SHIFT,
+ MAJOR(dev), MINOR(dev), ino, &len);
+
+ if (file) {
+ len = 25 + sizeof(void *) * 6 - len;
+ if (len < 1)
+ len = 1;
+ seq_printf(m, "%*c", len, ' ');
+ seq_path(m, file->f_vfsmnt, file->f_dentry, "");
+ }
+
+ seq_putc(m, '\n');
+ return 0;
+}
+
+static void *nommu_vma_list_start(struct seq_file *m, loff_t *_pos)
+{
+ struct rb_node *_rb;
+ loff_t pos = *_pos;
+ void *next = NULL;
+
+ down_read(&nommu_vma_sem);
+
+ for (_rb = rb_first(&nommu_vma_tree); _rb; _rb = rb_next(_rb)) {
+ if (pos == 0) {
+ next = _rb;
+ break;
+ }
+ }
+
+ return next;
+}
+
+static void nommu_vma_list_stop(struct seq_file *m, void *v)
+{
+ up_read(&nommu_vma_sem);
+}
+
+static void *nommu_vma_list_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ (*pos)++;
+ return rb_next((struct rb_node *) v);
+}
+
+static struct seq_operations proc_nommu_vma_list_seqop = {
+ .start = nommu_vma_list_start,
+ .next = nommu_vma_list_next,
+ .stop = nommu_vma_list_stop,
+ .show = nommu_vma_list_show
+};
+
+static int proc_nommu_vma_list_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &proc_nommu_vma_list_seqop);
+}
+
+static struct file_operations proc_nommu_vma_list_operations = {
+ .open = proc_nommu_vma_list_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static int __init proc_nommu_init(void)
+{
+ create_seq_entry("maps", S_IRUGO, &proc_nommu_vma_list_operations);
+ return 0;
+}
+
+module_init(proc_nommu_init);
diff --git a/fs/proc/proc_devtree.c b/fs/proc/proc_devtree.c
new file mode 100644
index 00000000000..67423c696c0
--- /dev/null
+++ b/fs/proc/proc_devtree.c
@@ -0,0 +1,165 @@
+/*
+ * proc_devtree.c - handles /proc/device-tree
+ *
+ * Copyright 1997 Paul Mackerras
+ */
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/string.h>
+#include <asm/prom.h>
+#include <asm/uaccess.h>
+
+#ifndef HAVE_ARCH_DEVTREE_FIXUPS
+static inline void set_node_proc_entry(struct device_node *np, struct proc_dir_entry *de)
+{
+}
+
+static void inline set_node_name_link(struct device_node *np, struct proc_dir_entry *de)
+{
+}
+
+static void inline set_node_addr_link(struct device_node *np, struct proc_dir_entry *de)
+{
+}
+#endif
+
+static struct proc_dir_entry *proc_device_tree;
+
+/*
+ * Supply data on a read from /proc/device-tree/node/property.
+ */
+static int property_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ struct property *pp = data;
+ int n;
+
+ if (off >= pp->length) {
+ *eof = 1;
+ return 0;
+ }
+ n = pp->length - off;
+ if (n > count)
+ n = count;
+ else
+ *eof = 1;
+ memcpy(page, pp->value + off, n);
+ *start = page;
+ return n;
+}
+
+/*
+ * For a node with a name like "gc@10", we make symlinks called "gc"
+ * and "@10" to it.
+ */
+
+/*
+ * Process a node, adding entries for its children and its properties.
+ */
+void proc_device_tree_add_node(struct device_node *np, struct proc_dir_entry *de)
+{
+ struct property *pp;
+ struct proc_dir_entry *ent;
+ struct device_node *child, *sib;
+ const char *p, *at;
+ int l;
+ struct proc_dir_entry *list, **lastp, *al;
+
+ set_node_proc_entry(np, de);
+ lastp = &list;
+ for (pp = np->properties; pp != 0; pp = pp->next) {
+ /*
+ * Unfortunately proc_register puts each new entry
+ * at the beginning of the list. So we rearrange them.
+ */
+ ent = create_proc_read_entry(pp->name, strncmp(pp->name, "security-", 9) ?
+ S_IRUGO : S_IRUSR, de, property_read_proc, pp);
+ if (ent == 0)
+ break;
+ if (!strncmp(pp->name, "security-", 9))
+ ent->size = 0; /* don't leak number of password chars */
+ else
+ ent->size = pp->length;
+ *lastp = ent;
+ lastp = &ent->next;
+ }
+ child = NULL;
+ while ((child = of_get_next_child(np, child))) {
+ p = strrchr(child->full_name, '/');
+ if (!p)
+ p = child->full_name;
+ else
+ ++p;
+ /* chop off '@0' if the name ends with that */
+ l = strlen(p);
+ if (l > 2 && p[l-2] == '@' && p[l-1] == '0')
+ l -= 2;
+ ent = proc_mkdir(p, de);
+ if (ent == 0)
+ break;
+ *lastp = ent;
+ lastp = &ent->next;
+ proc_device_tree_add_node(child, ent);
+
+ /*
+ * If we left the address part on the name, consider
+ * adding symlinks from the name and address parts.
+ */
+ if (p[l] != 0 || (at = strchr(p, '@')) == 0)
+ continue;
+
+ /*
+ * If this is the first node with a given name property,
+ * add a symlink with the name property as its name.
+ */
+ sib = NULL;
+ while ((sib = of_get_next_child(np, sib)) && sib != child)
+ if (sib->name && strcmp(sib->name, child->name) == 0)
+ break;
+ if (sib == child && strncmp(p, child->name, l) != 0) {
+ al = proc_symlink(child->name, de, ent->name);
+ if (al == 0) {
+ of_node_put(sib);
+ break;
+ }
+ set_node_name_link(child, al);
+ *lastp = al;
+ lastp = &al->next;
+ }
+ of_node_put(sib);
+ /*
+ * Add another directory with the @address part as its name.
+ */
+ al = proc_symlink(at, de, ent->name);
+ if (al == 0)
+ break;
+ set_node_addr_link(child, al);
+ *lastp = al;
+ lastp = &al->next;
+ }
+ of_node_put(child);
+ *lastp = NULL;
+ de->subdir = list;
+}
+
+/*
+ * Called on initialization to set up the /proc/device-tree subtree
+ */
+void proc_device_tree_init(void)
+{
+ struct device_node *root;
+ if ( !have_of )
+ return;
+ proc_device_tree = proc_mkdir("device-tree", NULL);
+ if (proc_device_tree == 0)
+ return;
+ root = of_find_node_by_path("/");
+ if (root == 0) {
+ printk(KERN_ERR "/proc/device-tree: can't find root\n");
+ return;
+ }
+ proc_device_tree_add_node(root, proc_device_tree);
+ of_node_put(root);
+}
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
new file mode 100644
index 00000000000..1d75d6ab689
--- /dev/null
+++ b/fs/proc/proc_misc.c
@@ -0,0 +1,615 @@
+/*
+ * linux/fs/proc/proc_misc.c
+ *
+ * linux/fs/proc/array.c
+ * Copyright (C) 1992 by Linus Torvalds
+ * based on ideas by Darren Senn
+ *
+ * This used to be the part of array.c. See the rest of history and credits
+ * there. I took this into a separate file and switched the thing to generic
+ * proc_file_inode_operations, leaving in array.c only per-process stuff.
+ * Inumbers allocation made dynamic (via create_proc_entry()). AV, May 1999.
+ *
+ * Changes:
+ * Fulton Green : Encapsulated position metric calculations.
+ * <kernel@FultonGreen.com>
+ */
+
+#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/config.h>
+#include <linux/mm.h>
+#include <linux/mmzone.h>
+#include <linux/pagemap.h>
+#include <linux/swap.h>
+#include <linux/slab.h>
+#include <linux/smp.h>
+#include <linux/signal.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/smp_lock.h>
+#include <linux/seq_file.h>
+#include <linux/times.h>
+#include <linux/profile.h>
+#include <linux/blkdev.h>
+#include <linux/hugetlb.h>
+#include <linux/jiffies.h>
+#include <linux/sysrq.h>
+#include <linux/vmalloc.h>
+#include <asm/uaccess.h>
+#include <asm/pgtable.h>
+#include <asm/io.h>
+#include <asm/tlb.h>
+#include <asm/div64.h>
+#include "internal.h"
+
+#define LOAD_INT(x) ((x) >> FSHIFT)
+#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
+/*
+ * Warning: stuff below (imported functions) assumes that its output will fit
+ * into one page. For some of those functions it may be wrong. Moreover, we
+ * have a way to deal with that gracefully. Right now I used straightforward
+ * wrappers, but this needs further analysis wrt potential overflows.
+ */
+extern int get_hardware_list(char *);
+extern int get_stram_list(char *);
+extern int get_chrdev_list(char *);
+extern int get_filesystem_list(char *);
+extern int get_exec_domain_list(char *);
+extern int get_dma_list(char *);
+extern int get_locks_status (char *, char **, off_t, int);
+
+static int proc_calc_metrics(char *page, char **start, off_t off,
+ int count, int *eof, int len)
+{
+ if (len <= off+count) *eof = 1;
+ *start = page + off;
+ len -= off;
+ if (len>count) len = count;
+ if (len<0) len = 0;
+ return len;
+}
+
+static int loadavg_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ int a, b, c;
+ int len;
+
+ a = avenrun[0] + (FIXED_1/200);
+ b = avenrun[1] + (FIXED_1/200);
+ c = avenrun[2] + (FIXED_1/200);
+ len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n",
+ LOAD_INT(a), LOAD_FRAC(a),
+ LOAD_INT(b), LOAD_FRAC(b),
+ LOAD_INT(c), LOAD_FRAC(c),
+ nr_running(), nr_threads, last_pid);
+ return proc_calc_metrics(page, start, off, count, eof, len);
+}
+
+static int uptime_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ struct timespec uptime;
+ struct timespec idle;
+ int len;
+ cputime_t idletime = cputime_add(init_task.utime, init_task.stime);
+
+ do_posix_clock_monotonic_gettime(&uptime);
+ cputime_to_timespec(idletime, &idle);
+ len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
+ (unsigned long) uptime.tv_sec,
+ (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
+ (unsigned long) idle.tv_sec,
+ (idle.tv_nsec / (NSEC_PER_SEC / 100)));
+
+ return proc_calc_metrics(page, start, off, count, eof, len);
+}
+
+static int meminfo_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ struct sysinfo i;
+ int len;
+ struct page_state ps;
+ unsigned long inactive;
+ unsigned long active;
+ unsigned long free;
+ unsigned long committed;
+ unsigned long allowed;
+ struct vmalloc_info vmi;
+
+ get_page_state(&ps);
+ get_zone_counts(&active, &inactive, &free);
+
+/*
+ * display in kilobytes.
+ */
+#define K(x) ((x) << (PAGE_SHIFT - 10))
+ si_meminfo(&i);
+ si_swapinfo(&i);
+ committed = atomic_read(&vm_committed_space);
+ allowed = ((totalram_pages - hugetlb_total_pages())
+ * sysctl_overcommit_ratio / 100) + total_swap_pages;
+
+ get_vmalloc_info(&vmi);
+
+ /*
+ * Tagged format, for easy grepping and expansion.
+ */
+ len = sprintf(page,
+ "MemTotal: %8lu kB\n"
+ "MemFree: %8lu kB\n"
+ "Buffers: %8lu kB\n"
+ "Cached: %8lu kB\n"
+ "SwapCached: %8lu kB\n"
+ "Active: %8lu kB\n"
+ "Inactive: %8lu kB\n"
+ "HighTotal: %8lu kB\n"
+ "HighFree: %8lu kB\n"
+ "LowTotal: %8lu kB\n"
+ "LowFree: %8lu kB\n"
+ "SwapTotal: %8lu kB\n"
+ "SwapFree: %8lu kB\n"
+ "Dirty: %8lu kB\n"
+ "Writeback: %8lu kB\n"
+ "Mapped: %8lu kB\n"
+ "Slab: %8lu kB\n"
+ "CommitLimit: %8lu kB\n"
+ "Committed_AS: %8lu kB\n"
+ "PageTables: %8lu kB\n"
+ "VmallocTotal: %8lu kB\n"
+ "VmallocUsed: %8lu kB\n"
+ "VmallocChunk: %8lu kB\n",
+ K(i.totalram),
+ K(i.freeram),
+ K(i.bufferram),
+ K(get_page_cache_size()-total_swapcache_pages-i.bufferram),
+ K(total_swapcache_pages),
+ K(active),
+ K(inactive),
+ K(i.totalhigh),
+ K(i.freehigh),
+ K(i.totalram-i.totalhigh),
+ K(i.freeram-i.freehigh),
+ K(i.totalswap),
+ K(i.freeswap),
+ K(ps.nr_dirty),
+ K(ps.nr_writeback),
+ K(ps.nr_mapped),
+ K(ps.nr_slab),
+ K(allowed),
+ K(committed),
+ K(ps.nr_page_table_pages),
+ (unsigned long)VMALLOC_TOTAL >> 10,
+ vmi.used >> 10,
+ vmi.largest_chunk >> 10
+ );
+
+ len += hugetlb_report_meminfo(page + len);
+
+ return proc_calc_metrics(page, start, off, count, eof, len);
+#undef K
+}
+
+extern struct seq_operations fragmentation_op;
+static int fragmentation_open(struct inode *inode, struct file *file)
+{
+ (void)inode;
+ return seq_open(file, &fragmentation_op);
+}
+
+static struct file_operations fragmentation_file_operations = {
+ .open = fragmentation_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static int version_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ int len;
+
+ strcpy(page, linux_banner);
+ len = strlen(page);
+ return proc_calc_metrics(page, start, off, count, eof, len);
+}
+
+extern struct seq_operations cpuinfo_op;
+static int cpuinfo_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &cpuinfo_op);
+}
+static struct file_operations proc_cpuinfo_operations = {
+ .open = cpuinfo_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+extern struct seq_operations vmstat_op;
+static int vmstat_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &vmstat_op);
+}
+static struct file_operations proc_vmstat_file_operations = {
+ .open = vmstat_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+#ifdef CONFIG_PROC_HARDWARE
+static int hardware_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ int len = get_hardware_list(page);
+ return proc_calc_metrics(page, start, off, count, eof, len);
+}
+#endif
+
+#ifdef CONFIG_STRAM_PROC
+static int stram_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ int len = get_stram_list(page);
+ return proc_calc_metrics(page, start, off, count, eof, len);
+}
+#endif
+
+extern struct seq_operations partitions_op;
+static int partitions_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &partitions_op);
+}
+static struct file_operations proc_partitions_operations = {
+ .open = partitions_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+extern struct seq_operations diskstats_op;
+static int diskstats_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &diskstats_op);
+}
+static struct file_operations proc_diskstats_operations = {
+ .open = diskstats_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+#ifdef CONFIG_MODULES
+extern struct seq_operations modules_op;
+static int modules_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &modules_op);
+}
+static struct file_operations proc_modules_operations = {
+ .open = modules_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+#endif
+
+extern struct seq_operations slabinfo_op;
+extern ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
+static int slabinfo_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &slabinfo_op);
+}
+static struct file_operations proc_slabinfo_operations = {
+ .open = slabinfo_open,
+ .read = seq_read,
+ .write = slabinfo_write,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static int show_stat(struct seq_file *p, void *v)
+{
+ int i;
+ unsigned long jif;
+ cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
+ u64 sum = 0;
+
+ user = nice = system = idle = iowait =
+ irq = softirq = steal = cputime64_zero;
+ jif = - wall_to_monotonic.tv_sec;
+ if (wall_to_monotonic.tv_nsec)
+ --jif;
+
+ for_each_cpu(i) {
+ int j;
+
+ user = cputime64_add(user, kstat_cpu(i).cpustat.user);
+ nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
+ system = cputime64_add(system, kstat_cpu(i).cpustat.system);
+ idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
+ iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
+ irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
+ softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
+ steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
+ for (j = 0 ; j < NR_IRQS ; j++)
+ sum += kstat_cpu(i).irqs[j];
+ }
+
+ seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu\n",
+ (unsigned long long)cputime64_to_clock_t(user),
+ (unsigned long long)cputime64_to_clock_t(nice),
+ (unsigned long long)cputime64_to_clock_t(system),
+ (unsigned long long)cputime64_to_clock_t(idle),
+ (unsigned long long)cputime64_to_clock_t(iowait),
+ (unsigned long long)cputime64_to_clock_t(irq),
+ (unsigned long long)cputime64_to_clock_t(softirq),
+ (unsigned long long)cputime64_to_clock_t(steal));
+ for_each_online_cpu(i) {
+
+ /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
+ user = kstat_cpu(i).cpustat.user;
+ nice = kstat_cpu(i).cpustat.nice;
+ system = kstat_cpu(i).cpustat.system;
+ idle = kstat_cpu(i).cpustat.idle;
+ iowait = kstat_cpu(i).cpustat.iowait;
+ irq = kstat_cpu(i).cpustat.irq;
+ softirq = kstat_cpu(i).cpustat.softirq;
+ steal = kstat_cpu(i).cpustat.steal;
+ seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu\n",
+ i,
+ (unsigned long long)cputime64_to_clock_t(user),
+ (unsigned long long)cputime64_to_clock_t(nice),
+ (unsigned long long)cputime64_to_clock_t(system),
+ (unsigned long long)cputime64_to_clock_t(idle),
+ (unsigned long long)cputime64_to_clock_t(iowait),
+ (unsigned long long)cputime64_to_clock_t(irq),
+ (unsigned long long)cputime64_to_clock_t(softirq),
+ (unsigned long long)cputime64_to_clock_t(steal));
+ }
+ seq_printf(p, "intr %llu", (unsigned long long)sum);
+
+#if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA)
+ for (i = 0; i < NR_IRQS; i++)
+ seq_printf(p, " %u", kstat_irqs(i));
+#endif
+
+ seq_printf(p,
+ "\nctxt %llu\n"
+ "btime %lu\n"
+ "processes %lu\n"
+ "procs_running %lu\n"
+ "procs_blocked %lu\n",
+ nr_context_switches(),
+ (unsigned long)jif,
+ total_forks,
+ nr_running(),
+ nr_iowait());
+
+ return 0;
+}
+
+static int stat_open(struct inode *inode, struct file *file)
+{
+ unsigned size = 4096 * (1 + num_possible_cpus() / 32);
+ char *buf;
+ struct seq_file *m;
+ int res;
+
+ /* don't ask for more than the kmalloc() max size, currently 128 KB */
+ if (size > 128 * 1024)
+ size = 128 * 1024;
+ buf = kmalloc(size, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ res = single_open(file, show_stat, NULL);
+ if (!res) {
+ m = file->private_data;
+ m->buf = buf;
+ m->size = size;
+ } else
+ kfree(buf);
+ return res;
+}
+static struct file_operations proc_stat_operations = {
+ .open = stat_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int devices_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ int len = get_chrdev_list(page);
+ len += get_blkdev_list(page+len);
+ return proc_calc_metrics(page, start, off, count, eof, len);
+}
+
+/*
+ * /proc/interrupts
+ */
+static void *int_seq_start(struct seq_file *f, loff_t *pos)
+{
+ return (*pos <= NR_IRQS) ? pos : NULL;
+}
+
+static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
+{
+ (*pos)++;
+ if (*pos > NR_IRQS)
+ return NULL;
+ return pos;
+}
+
+static void int_seq_stop(struct seq_file *f, void *v)
+{
+ /* Nothing to do */
+}
+
+
+extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
+static struct seq_operations int_seq_ops = {
+ .start = int_seq_start,
+ .next = int_seq_next,
+ .stop = int_seq_stop,
+ .show = show_interrupts
+};
+
+static int interrupts_open(struct inode *inode, struct file *filp)
+{
+ return seq_open(filp, &int_seq_ops);
+}
+
+static struct file_operations proc_interrupts_operations = {
+ .open = interrupts_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static int filesystems_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ int len = get_filesystem_list(page);
+ return proc_calc_metrics(page, start, off, count, eof, len);
+}
+
+static int cmdline_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ int len;
+
+ len = sprintf(page, "%s\n", saved_command_line);
+ return proc_calc_metrics(page, start, off, count, eof, len);
+}
+
+static int locks_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ int len = get_locks_status(page, start, off, count);
+
+ if (len < count)
+ *eof = 1;
+ return len;
+}
+
+static int execdomains_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ int len = get_exec_domain_list(page);
+ return proc_calc_metrics(page, start, off, count, eof, len);
+}
+
+#ifdef CONFIG_MAGIC_SYSRQ
+/*
+ * writing 'C' to /proc/sysrq-trigger is like sysrq-C
+ */
+static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ if (count) {
+ char c;
+
+ if (get_user(c, buf))
+ return -EFAULT;
+ __handle_sysrq(c, NULL, NULL, 0);
+ }
+ return count;
+}
+
+static struct file_operations proc_sysrq_trigger_operations = {
+ .write = write_sysrq_trigger,
+};
+#endif
+
+struct proc_dir_entry *proc_root_kcore;
+
+void create_seq_entry(char *name, mode_t mode, struct file_operations *f)
+{
+ struct proc_dir_entry *entry;
+ entry = create_proc_entry(name, mode, NULL);
+ if (entry)
+ entry->proc_fops = f;
+}
+
+void __init proc_misc_init(void)
+{
+ struct proc_dir_entry *entry;
+ static struct {
+ char *name;
+ int (*read_proc)(char*,char**,off_t,int,int*,void*);
+ } *p, simple_ones[] = {
+ {"loadavg", loadavg_read_proc},
+ {"uptime", uptime_read_proc},
+ {"meminfo", meminfo_read_proc},
+ {"version", version_read_proc},
+#ifdef CONFIG_PROC_HARDWARE
+ {"hardware", hardware_read_proc},
+#endif
+#ifdef CONFIG_STRAM_PROC
+ {"stram", stram_read_proc},
+#endif
+ {"devices", devices_read_proc},
+ {"filesystems", filesystems_read_proc},
+ {"cmdline", cmdline_read_proc},
+ {"locks", locks_read_proc},
+ {"execdomains", execdomains_read_proc},
+ {NULL,}
+ };
+ for (p = simple_ones; p->name; p++)
+ create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
+
+ proc_symlink("mounts", NULL, "self/mounts");
+
+ /* And now for trickier ones */
+ entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
+ if (entry)
+ entry->proc_fops = &proc_kmsg_operations;
+ create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
+ create_seq_entry("partitions", 0, &proc_partitions_operations);
+ create_seq_entry("stat", 0, &proc_stat_operations);
+ create_seq_entry("interrupts", 0, &proc_interrupts_operations);
+ create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
+ create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
+ create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
+ create_seq_entry("diskstats", 0, &proc_diskstats_operations);
+#ifdef CONFIG_MODULES
+ create_seq_entry("modules", 0, &proc_modules_operations);
+#endif
+#ifdef CONFIG_SCHEDSTATS
+ create_seq_entry("schedstat", 0, &proc_schedstat_operations);
+#endif
+#ifdef CONFIG_PROC_KCORE
+ proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
+ if (proc_root_kcore) {
+ proc_root_kcore->proc_fops = &proc_kcore_operations;
+ proc_root_kcore->size =
+ (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
+ }
+#endif
+#ifdef CONFIG_MAGIC_SYSRQ
+ entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
+ if (entry)
+ entry->proc_fops = &proc_sysrq_trigger_operations;
+#endif
+#ifdef CONFIG_PPC32
+ {
+ extern struct file_operations ppc_htab_operations;
+ entry = create_proc_entry("ppc_htab", S_IRUGO|S_IWUSR, NULL);
+ if (entry)
+ entry->proc_fops = &ppc_htab_operations;
+ }
+#endif
+}
diff --git a/fs/proc/proc_tty.c b/fs/proc/proc_tty.c
new file mode 100644
index 00000000000..15c4455b09e
--- /dev/null
+++ b/fs/proc/proc_tty.c
@@ -0,0 +1,242 @@
+/*
+ * proc_tty.c -- handles /proc/tty
+ *
+ * Copyright 1997, Theodore Ts'o
+ */
+
+#include <asm/uaccess.h>
+
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/tty.h>
+#include <linux/seq_file.h>
+#include <linux/bitops.h>
+
+static int tty_ldiscs_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data);
+
+/*
+ * The /proc/tty directory inodes...
+ */
+static struct proc_dir_entry *proc_tty_ldisc, *proc_tty_driver;
+
+/*
+ * This is the handler for /proc/tty/drivers
+ */
+static void show_tty_range(struct seq_file *m, struct tty_driver *p,
+ dev_t from, int num)
+{
+ seq_printf(m, "%-20s ", p->driver_name ? p->driver_name : "unknown");
+ seq_printf(m, "/dev/%-8s ", p->name);
+ if (p->num > 1) {
+ seq_printf(m, "%3d %d-%d ", MAJOR(from), MINOR(from),
+ MINOR(from) + num - 1);
+ } else {
+ seq_printf(m, "%3d %7d ", MAJOR(from), MINOR(from));
+ }
+ switch (p->type) {
+ case TTY_DRIVER_TYPE_SYSTEM:
+ seq_printf(m, "system");
+ if (p->subtype == SYSTEM_TYPE_TTY)
+ seq_printf(m, ":/dev/tty");
+ else if (p->subtype == SYSTEM_TYPE_SYSCONS)
+ seq_printf(m, ":console");
+ else if (p->subtype == SYSTEM_TYPE_CONSOLE)
+ seq_printf(m, ":vtmaster");
+ break;
+ case TTY_DRIVER_TYPE_CONSOLE:
+ seq_printf(m, "console");
+ break;
+ case TTY_DRIVER_TYPE_SERIAL:
+ seq_printf(m, "serial");
+ break;
+ case TTY_DRIVER_TYPE_PTY:
+ if (p->subtype == PTY_TYPE_MASTER)
+ seq_printf(m, "pty:master");
+ else if (p->subtype == PTY_TYPE_SLAVE)
+ seq_printf(m, "pty:slave");
+ else
+ seq_printf(m, "pty");
+ break;
+ default:
+ seq_printf(m, "type:%d.%d", p->type, p->subtype);
+ }
+ seq_putc(m, '\n');
+}
+
+static int show_tty_driver(struct seq_file *m, void *v)
+{
+ struct tty_driver *p = v;
+ dev_t from = MKDEV(p->major, p->minor_start);
+ dev_t to = from + p->num;
+
+ if (&p->tty_drivers == tty_drivers.next) {
+ /* pseudo-drivers first */
+ seq_printf(m, "%-20s /dev/%-8s ", "/dev/tty", "tty");
+ seq_printf(m, "%3d %7d ", TTYAUX_MAJOR, 0);
+ seq_printf(m, "system:/dev/tty\n");
+ seq_printf(m, "%-20s /dev/%-8s ", "/dev/console", "console");
+ seq_printf(m, "%3d %7d ", TTYAUX_MAJOR, 1);
+ seq_printf(m, "system:console\n");
+#ifdef CONFIG_UNIX98_PTYS
+ seq_printf(m, "%-20s /dev/%-8s ", "/dev/ptmx", "ptmx");
+ seq_printf(m, "%3d %7d ", TTYAUX_MAJOR, 2);
+ seq_printf(m, "system\n");
+#endif
+#ifdef CONFIG_VT
+ seq_printf(m, "%-20s /dev/%-8s ", "/dev/vc/0", "vc/0");
+ seq_printf(m, "%3d %7d ", TTY_MAJOR, 0);
+ seq_printf(m, "system:vtmaster\n");
+#endif
+ }
+
+ while (MAJOR(from) < MAJOR(to)) {
+ dev_t next = MKDEV(MAJOR(from)+1, 0);
+ show_tty_range(m, p, from, next - from);
+ from = next;
+ }
+ if (from != to)
+ show_tty_range(m, p, from, to - from);
+ return 0;
+}
+
+/* iterator */
+static void *t_start(struct seq_file *m, loff_t *pos)
+{
+ struct list_head *p;
+ loff_t l = *pos;
+ list_for_each(p, &tty_drivers)
+ if (!l--)
+ return list_entry(p, struct tty_driver, tty_drivers);
+ return NULL;
+}
+
+static void *t_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ struct list_head *p = ((struct tty_driver *)v)->tty_drivers.next;
+ (*pos)++;
+ return p==&tty_drivers ? NULL :
+ list_entry(p, struct tty_driver, tty_drivers);
+}
+
+static void t_stop(struct seq_file *m, void *v)
+{
+}
+
+static struct seq_operations tty_drivers_op = {
+ .start = t_start,
+ .next = t_next,
+ .stop = t_stop,
+ .show = show_tty_driver
+};
+
+static int tty_drivers_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &tty_drivers_op);
+}
+
+static struct file_operations proc_tty_drivers_operations = {
+ .open = tty_drivers_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+/*
+ * This is the handler for /proc/tty/ldiscs
+ */
+static int tty_ldiscs_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ int i;
+ int len = 0;
+ off_t begin = 0;
+ struct tty_ldisc *ld;
+
+ for (i=0; i < NR_LDISCS; i++) {
+ ld = tty_ldisc_get(i);
+ if (ld == NULL)
+ continue;
+ len += sprintf(page+len, "%-10s %2d\n",
+ ld->name ? ld->name : "???", i);
+ tty_ldisc_put(i);
+ if (len+begin > off+count)
+ break;
+ if (len+begin < off) {
+ begin += len;
+ len = 0;
+ }
+ }
+ if (i >= NR_LDISCS)
+ *eof = 1;
+ if (off >= len+begin)
+ return 0;
+ *start = page + (off-begin);
+ return ((count < begin+len-off) ? count : begin+len-off);
+}
+
+/*
+ * This function is called by tty_register_driver() to handle
+ * registering the driver's /proc handler into /proc/tty/driver/<foo>
+ */
+void proc_tty_register_driver(struct tty_driver *driver)
+{
+ struct proc_dir_entry *ent;
+
+ if ((!driver->read_proc && !driver->write_proc) ||
+ !driver->driver_name ||
+ driver->proc_entry)
+ return;
+
+ ent = create_proc_entry(driver->driver_name, 0, proc_tty_driver);
+ if (!ent)
+ return;
+ ent->read_proc = driver->read_proc;
+ ent->write_proc = driver->write_proc;
+ ent->owner = driver->owner;
+ ent->data = driver;
+
+ driver->proc_entry = ent;
+}
+
+/*
+ * This function is called by tty_unregister_driver()
+ */
+void proc_tty_unregister_driver(struct tty_driver *driver)
+{
+ struct proc_dir_entry *ent;
+
+ ent = driver->proc_entry;
+ if (!ent)
+ return;
+
+ remove_proc_entry(driver->driver_name, proc_tty_driver);
+
+ driver->proc_entry = NULL;
+}
+
+/*
+ * Called by proc_root_init() to initialize the /proc/tty subtree
+ */
+void __init proc_tty_init(void)
+{
+ struct proc_dir_entry *entry;
+ if (!proc_mkdir("tty", NULL))
+ return;
+ proc_tty_ldisc = proc_mkdir("tty/ldisc", NULL);
+ /*
+ * /proc/tty/driver/serial reveals the exact character counts for
+ * serial links which is just too easy to abuse for inferring
+ * password lengths and inter-keystroke timings during password
+ * entry.
+ */
+ proc_tty_driver = proc_mkdir_mode("tty/driver", S_IRUSR | S_IXUSR, NULL);
+
+ create_proc_read_entry("tty/ldiscs", 0, NULL, tty_ldiscs_read_proc, NULL);
+ entry = create_proc_entry("tty/drivers", 0, NULL);
+ if (entry)
+ entry->proc_fops = &proc_tty_drivers_operations;
+}
diff --git a/fs/proc/root.c b/fs/proc/root.c
new file mode 100644
index 00000000000..aef148f099a
--- /dev/null
+++ b/fs/proc/root.c
@@ -0,0 +1,161 @@
+/*
+ * linux/fs/proc/root.c
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * proc root directory handling functions
+ */
+
+#include <asm/uaccess.h>
+
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/bitops.h>
+#include <linux/smp_lock.h>
+
+struct proc_dir_entry *proc_net, *proc_net_stat, *proc_bus, *proc_root_fs, *proc_root_driver;
+
+#ifdef CONFIG_SYSCTL
+struct proc_dir_entry *proc_sys_root;
+#endif
+
+static struct super_block *proc_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data)
+{
+ return get_sb_single(fs_type, flags, data, proc_fill_super);
+}
+
+static struct file_system_type proc_fs_type = {
+ .name = "proc",
+ .get_sb = proc_get_sb,
+ .kill_sb = kill_anon_super,
+};
+
+extern int __init proc_init_inodecache(void);
+void __init proc_root_init(void)
+{
+ int err = proc_init_inodecache();
+ if (err)
+ return;
+ err = register_filesystem(&proc_fs_type);
+ if (err)
+ return;
+ proc_mnt = kern_mount(&proc_fs_type);
+ err = PTR_ERR(proc_mnt);
+ if (IS_ERR(proc_mnt)) {
+ unregister_filesystem(&proc_fs_type);
+ return;
+ }
+ proc_misc_init();
+ proc_net = proc_mkdir("net", NULL);
+ proc_net_stat = proc_mkdir("net/stat", NULL);
+
+#ifdef CONFIG_SYSVIPC
+ proc_mkdir("sysvipc", NULL);
+#endif
+#ifdef CONFIG_SYSCTL
+ proc_sys_root = proc_mkdir("sys", NULL);
+#endif
+#if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
+ proc_mkdir("sys/fs", NULL);
+ proc_mkdir("sys/fs/binfmt_misc", NULL);
+#endif
+ proc_root_fs = proc_mkdir("fs", NULL);
+ proc_root_driver = proc_mkdir("driver", NULL);
+ proc_mkdir("fs/nfsd", NULL); /* somewhere for the nfsd filesystem to be mounted */
+#if defined(CONFIG_SUN_OPENPROMFS) || defined(CONFIG_SUN_OPENPROMFS_MODULE)
+ /* just give it a mountpoint */
+ proc_mkdir("openprom", NULL);
+#endif
+ proc_tty_init();
+#ifdef CONFIG_PROC_DEVICETREE
+ proc_device_tree_init();
+#endif
+ proc_bus = proc_mkdir("bus", NULL);
+}
+
+static struct dentry *proc_root_lookup(struct inode * dir, struct dentry * dentry, struct nameidata *nd)
+{
+ /*
+ * nr_threads is actually protected by the tasklist_lock;
+ * however, it's conventional to do reads, especially for
+ * reporting, without any locking whatsoever.
+ */
+ if (dir->i_ino == PROC_ROOT_INO) /* check for safety... */
+ dir->i_nlink = proc_root.nlink + nr_threads;
+
+ if (!proc_lookup(dir, dentry, nd)) {
+ return NULL;
+ }
+
+ return proc_pid_lookup(dir, dentry, nd);
+}
+
+static int proc_root_readdir(struct file * filp,
+ void * dirent, filldir_t filldir)
+{
+ unsigned int nr = filp->f_pos;
+ int ret;
+
+ lock_kernel();
+
+ if (nr < FIRST_PROCESS_ENTRY) {
+ int error = proc_readdir(filp, dirent, filldir);
+ if (error <= 0) {
+ unlock_kernel();
+ return error;
+ }
+ filp->f_pos = FIRST_PROCESS_ENTRY;
+ }
+ unlock_kernel();
+
+ ret = proc_pid_readdir(filp, dirent, filldir);
+ return ret;
+}
+
+/*
+ * The root /proc directory is special, as it has the
+ * <pid> directories. Thus we don't use the generic
+ * directory handling functions for that..
+ */
+static struct file_operations proc_root_operations = {
+ .read = generic_read_dir,
+ .readdir = proc_root_readdir,
+};
+
+/*
+ * proc root can do almost nothing..
+ */
+static struct inode_operations proc_root_inode_operations = {
+ .lookup = proc_root_lookup,
+};
+
+/*
+ * This is the root "inode" in the /proc tree..
+ */
+struct proc_dir_entry proc_root = {
+ .low_ino = PROC_ROOT_INO,
+ .namelen = 5,
+ .name = "/proc",
+ .mode = S_IFDIR | S_IRUGO | S_IXUGO,
+ .nlink = 2,
+ .proc_iops = &proc_root_inode_operations,
+ .proc_fops = &proc_root_operations,
+ .parent = &proc_root,
+};
+
+EXPORT_SYMBOL(proc_symlink);
+EXPORT_SYMBOL(proc_mkdir);
+EXPORT_SYMBOL(create_proc_entry);
+EXPORT_SYMBOL(remove_proc_entry);
+EXPORT_SYMBOL(proc_root);
+EXPORT_SYMBOL(proc_root_fs);
+EXPORT_SYMBOL(proc_net);
+EXPORT_SYMBOL(proc_net_stat);
+EXPORT_SYMBOL(proc_bus);
+EXPORT_SYMBOL(proc_root_driver);
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
new file mode 100644
index 00000000000..28b4a0253a9
--- /dev/null
+++ b/fs/proc/task_mmu.c
@@ -0,0 +1,235 @@
+#include <linux/mm.h>
+#include <linux/hugetlb.h>
+#include <linux/mount.h>
+#include <linux/seq_file.h>
+#include <asm/elf.h>
+#include <asm/uaccess.h>
+#include "internal.h"
+
+char *task_mem(struct mm_struct *mm, char *buffer)
+{
+ unsigned long data, text, lib;
+
+ data = mm->total_vm - mm->shared_vm - mm->stack_vm;
+ text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> 10;
+ lib = (mm->exec_vm << (PAGE_SHIFT-10)) - text;
+ buffer += sprintf(buffer,
+ "VmSize:\t%8lu kB\n"
+ "VmLck:\t%8lu kB\n"
+ "VmRSS:\t%8lu kB\n"
+ "VmData:\t%8lu kB\n"
+ "VmStk:\t%8lu kB\n"
+ "VmExe:\t%8lu kB\n"
+ "VmLib:\t%8lu kB\n"
+ "VmPTE:\t%8lu kB\n",
+ (mm->total_vm - mm->reserved_vm) << (PAGE_SHIFT-10),
+ mm->locked_vm << (PAGE_SHIFT-10),
+ get_mm_counter(mm, rss) << (PAGE_SHIFT-10),
+ data << (PAGE_SHIFT-10),
+ mm->stack_vm << (PAGE_SHIFT-10), text, lib,
+ (PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10);
+ return buffer;
+}
+
+unsigned long task_vsize(struct mm_struct *mm)
+{
+ return PAGE_SIZE * mm->total_vm;
+}
+
+int task_statm(struct mm_struct *mm, int *shared, int *text,
+ int *data, int *resident)
+{
+ int rss = get_mm_counter(mm, rss);
+
+ *shared = rss - get_mm_counter(mm, anon_rss);
+ *text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK))
+ >> PAGE_SHIFT;
+ *data = mm->total_vm - mm->shared_vm;
+ *resident = rss;
+ return mm->total_vm;
+}
+
+int proc_exe_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt)
+{
+ struct vm_area_struct * vma;
+ int result = -ENOENT;
+ struct task_struct *task = proc_task(inode);
+ struct mm_struct * mm = get_task_mm(task);
+
+ if (!mm)
+ goto out;
+ down_read(&mm->mmap_sem);
+
+ vma = mm->mmap;
+ while (vma) {
+ if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file)
+ break;
+ vma = vma->vm_next;
+ }
+
+ if (vma) {
+ *mnt = mntget(vma->vm_file->f_vfsmnt);
+ *dentry = dget(vma->vm_file->f_dentry);
+ result = 0;
+ }
+
+ up_read(&mm->mmap_sem);
+ mmput(mm);
+out:
+ return result;
+}
+
+static void pad_len_spaces(struct seq_file *m, int len)
+{
+ len = 25 + sizeof(void*) * 6 - len;
+ if (len < 1)
+ len = 1;
+ seq_printf(m, "%*c", len, ' ');
+}
+
+static int show_map(struct seq_file *m, void *v)
+{
+ struct task_struct *task = m->private;
+ struct vm_area_struct *map = v;
+ struct mm_struct *mm = map->vm_mm;
+ struct file *file = map->vm_file;
+ int flags = map->vm_flags;
+ unsigned long ino = 0;
+ dev_t dev = 0;
+ int len;
+
+ if (file) {
+ struct inode *inode = map->vm_file->f_dentry->d_inode;
+ dev = inode->i_sb->s_dev;
+ ino = inode->i_ino;
+ }
+
+ seq_printf(m, "%08lx-%08lx %c%c%c%c %08lx %02x:%02x %lu %n",
+ map->vm_start,
+ map->vm_end,
+ flags & VM_READ ? 'r' : '-',
+ flags & VM_WRITE ? 'w' : '-',
+ flags & VM_EXEC ? 'x' : '-',
+ flags & VM_MAYSHARE ? 's' : 'p',
+ map->vm_pgoff << PAGE_SHIFT,
+ MAJOR(dev), MINOR(dev), ino, &len);
+
+ /*
+ * Print the dentry name for named mappings, and a
+ * special [heap] marker for the heap:
+ */
+ if (map->vm_file) {
+ pad_len_spaces(m, len);
+ seq_path(m, file->f_vfsmnt, file->f_dentry, "");
+ } else {
+ if (mm) {
+ if (map->vm_start <= mm->start_brk &&
+ map->vm_end >= mm->brk) {
+ pad_len_spaces(m, len);
+ seq_puts(m, "[heap]");
+ } else {
+ if (map->vm_start <= mm->start_stack &&
+ map->vm_end >= mm->start_stack) {
+
+ pad_len_spaces(m, len);
+ seq_puts(m, "[stack]");
+ }
+ }
+ } else {
+ pad_len_spaces(m, len);
+ seq_puts(m, "[vdso]");
+ }
+ }
+ seq_putc(m, '\n');
+ if (m->count < m->size) /* map is copied successfully */
+ m->version = (map != get_gate_vma(task))? map->vm_start: 0;
+ return 0;
+}
+
+static void *m_start(struct seq_file *m, loff_t *pos)
+{
+ struct task_struct *task = m->private;
+ unsigned long last_addr = m->version;
+ struct mm_struct *mm;
+ struct vm_area_struct *map, *tail_map;
+ loff_t l = *pos;
+
+ /*
+ * We remember last_addr rather than next_addr to hit with
+ * mmap_cache most of the time. We have zero last_addr at
+ * the begining and also after lseek. We will have -1 last_addr
+ * after the end of the maps.
+ */
+
+ if (last_addr == -1UL)
+ return NULL;
+
+ mm = get_task_mm(task);
+ if (!mm)
+ return NULL;
+
+ tail_map = get_gate_vma(task);
+ down_read(&mm->mmap_sem);
+
+ /* Start with last addr hint */
+ if (last_addr && (map = find_vma(mm, last_addr))) {
+ map = map->vm_next;
+ goto out;
+ }
+
+ /*
+ * Check the map index is within the range and do
+ * sequential scan until m_index.
+ */
+ map = NULL;
+ if ((unsigned long)l < mm->map_count) {
+ map = mm->mmap;
+ while (l-- && map)
+ map = map->vm_next;
+ goto out;
+ }
+
+ if (l != mm->map_count)
+ tail_map = NULL; /* After gate map */
+
+out:
+ if (map)
+ return map;
+
+ /* End of maps has reached */
+ m->version = (tail_map != NULL)? 0: -1UL;
+ up_read(&mm->mmap_sem);
+ mmput(mm);
+ return tail_map;
+}
+
+static void m_stop(struct seq_file *m, void *v)
+{
+ struct task_struct *task = m->private;
+ struct vm_area_struct *map = v;
+ if (map && map != get_gate_vma(task)) {
+ struct mm_struct *mm = map->vm_mm;
+ up_read(&mm->mmap_sem);
+ mmput(mm);
+ }
+}
+
+static void *m_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ struct task_struct *task = m->private;
+ struct vm_area_struct *map = v;
+ struct vm_area_struct *tail_map = get_gate_vma(task);
+
+ (*pos)++;
+ if (map && (map != tail_map) && map->vm_next)
+ return map->vm_next;
+ m_stop(m, v);
+ return (map != tail_map)? tail_map: NULL;
+}
+
+struct seq_operations proc_pid_maps_op = {
+ .start = m_start,
+ .next = m_next,
+ .stop = m_stop,
+ .show = show_map
+};
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
new file mode 100644
index 00000000000..8f68827ed10
--- /dev/null
+++ b/fs/proc/task_nommu.c
@@ -0,0 +1,164 @@
+
+#include <linux/mm.h>
+#include <linux/file.h>
+#include <linux/mount.h>
+#include <linux/seq_file.h>
+#include "internal.h"
+
+/*
+ * Logic: we've got two memory sums for each process, "shared", and
+ * "non-shared". Shared memory may get counted more then once, for
+ * each process that owns it. Non-shared memory is counted
+ * accurately.
+ */
+char *task_mem(struct mm_struct *mm, char *buffer)
+{
+ struct vm_list_struct *vml;
+ unsigned long bytes = 0, sbytes = 0, slack = 0;
+
+ down_read(&mm->mmap_sem);
+ for (vml = mm->context.vmlist; vml; vml = vml->next) {
+ if (!vml->vma)
+ continue;
+
+ bytes += kobjsize(vml);
+ if (atomic_read(&mm->mm_count) > 1 ||
+ atomic_read(&vml->vma->vm_usage) > 1
+ ) {
+ sbytes += kobjsize((void *) vml->vma->vm_start);
+ sbytes += kobjsize(vml->vma);
+ } else {
+ bytes += kobjsize((void *) vml->vma->vm_start);
+ bytes += kobjsize(vml->vma);
+ slack += kobjsize((void *) vml->vma->vm_start) -
+ (vml->vma->vm_end - vml->vma->vm_start);
+ }
+ }
+
+ if (atomic_read(&mm->mm_count) > 1)
+ sbytes += kobjsize(mm);
+ else
+ bytes += kobjsize(mm);
+
+ if (current->fs && atomic_read(&current->fs->count) > 1)
+ sbytes += kobjsize(current->fs);
+ else
+ bytes += kobjsize(current->fs);
+
+ if (current->files && atomic_read(&current->files->count) > 1)
+ sbytes += kobjsize(current->files);
+ else
+ bytes += kobjsize(current->files);
+
+ if (current->sighand && atomic_read(&current->sighand->count) > 1)
+ sbytes += kobjsize(current->sighand);
+ else
+ bytes += kobjsize(current->sighand);
+
+ bytes += kobjsize(current); /* includes kernel stack */
+
+ buffer += sprintf(buffer,
+ "Mem:\t%8lu bytes\n"
+ "Slack:\t%8lu bytes\n"
+ "Shared:\t%8lu bytes\n",
+ bytes, slack, sbytes);
+
+ up_read(&mm->mmap_sem);
+ return buffer;
+}
+
+unsigned long task_vsize(struct mm_struct *mm)
+{
+ struct vm_list_struct *tbp;
+ unsigned long vsize = 0;
+
+ down_read(&mm->mmap_sem);
+ for (tbp = mm->context.vmlist; tbp; tbp = tbp->next) {
+ if (tbp->vma)
+ vsize += kobjsize((void *) tbp->vma->vm_start);
+ }
+ up_read(&mm->mmap_sem);
+ return vsize;
+}
+
+int task_statm(struct mm_struct *mm, int *shared, int *text,
+ int *data, int *resident)
+{
+ struct vm_list_struct *tbp;
+ int size = kobjsize(mm);
+
+ down_read(&mm->mmap_sem);
+ for (tbp = mm->context.vmlist; tbp; tbp = tbp->next) {
+ size += kobjsize(tbp);
+ if (tbp->vma) {
+ size += kobjsize(tbp->vma);
+ size += kobjsize((void *) tbp->vma->vm_start);
+ }
+ }
+
+ size += (*text = mm->end_code - mm->start_code);
+ size += (*data = mm->start_stack - mm->start_data);
+ up_read(&mm->mmap_sem);
+ *resident = size;
+ return size;
+}
+
+int proc_exe_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt)
+{
+ struct vm_list_struct *vml;
+ struct vm_area_struct *vma;
+ struct task_struct *task = proc_task(inode);
+ struct mm_struct *mm = get_task_mm(task);
+ int result = -ENOENT;
+
+ if (!mm)
+ goto out;
+ down_read(&mm->mmap_sem);
+
+ vml = mm->context.vmlist;
+ vma = NULL;
+ while (vml) {
+ if ((vml->vma->vm_flags & VM_EXECUTABLE) && vml->vma->vm_file) {
+ vma = vml->vma;
+ break;
+ }
+ vml = vml->next;
+ }
+
+ if (vma) {
+ *mnt = mntget(vma->vm_file->f_vfsmnt);
+ *dentry = dget(vma->vm_file->f_dentry);
+ result = 0;
+ }
+
+ up_read(&mm->mmap_sem);
+ mmput(mm);
+out:
+ return result;
+}
+
+/*
+ * Albert D. Cahalan suggested to fake entries for the traditional
+ * sections here. This might be worth investigating.
+ */
+static int show_map(struct seq_file *m, void *v)
+{
+ return 0;
+}
+static void *m_start(struct seq_file *m, loff_t *pos)
+{
+ return NULL;
+}
+static void m_stop(struct seq_file *m, void *v)
+{
+}
+static void *m_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ return NULL;
+}
+struct seq_operations proc_pid_maps_op = {
+ .start = m_start,
+ .next = m_next,
+ .stop = m_stop,
+ .show = show_map
+};
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-28 02:23:40 +0000