summaryrefslogtreecommitdiff
path: root/ANDROID_3.4.5/fs/proc/root.c
diff options
context:
space:
mode:
Diffstat (limited to 'ANDROID_3.4.5/fs/proc/root.c')
-rw-r--r--ANDROID_3.4.5/fs/proc/root.c278
1 files changed, 0 insertions, 278 deletions
diff --git a/ANDROID_3.4.5/fs/proc/root.c b/ANDROID_3.4.5/fs/proc/root.c
deleted file mode 100644
index eed44bfc..00000000
--- a/ANDROID_3.4.5/fs/proc/root.c
+++ /dev/null
@@ -1,278 +0,0 @@
-/*
- * 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/init.h>
-#include <linux/sched.h>
-#include <linux/module.h>
-#include <linux/bitops.h>
-#include <linux/mount.h>
-#include <linux/pid_namespace.h>
-#include <linux/parser.h>
-
-#include "internal.h"
-
-static int proc_test_super(struct super_block *sb, void *data)
-{
- return sb->s_fs_info == data;
-}
-
-static int proc_set_super(struct super_block *sb, void *data)
-{
- int err = set_anon_super(sb, NULL);
- if (!err) {
- struct pid_namespace *ns = (struct pid_namespace *)data;
- sb->s_fs_info = get_pid_ns(ns);
- }
- return err;
-}
-
-enum {
- Opt_gid, Opt_hidepid, Opt_err,
-};
-
-static const match_table_t tokens = {
- {Opt_hidepid, "hidepid=%u"},
- {Opt_gid, "gid=%u"},
- {Opt_err, NULL},
-};
-
-static int proc_parse_options(char *options, struct pid_namespace *pid)
-{
- char *p;
- substring_t args[MAX_OPT_ARGS];
- int option;
-
- if (!options)
- return 1;
-
- while ((p = strsep(&options, ",")) != NULL) {
- int token;
- if (!*p)
- continue;
-
- args[0].to = args[0].from = 0;
- token = match_token(p, tokens, args);
- switch (token) {
- case Opt_gid:
- if (match_int(&args[0], &option))
- return 0;
- pid->pid_gid = option;
- break;
- case Opt_hidepid:
- if (match_int(&args[0], &option))
- return 0;
- if (option < 0 || option > 2) {
- pr_err("proc: hidepid value must be between 0 and 2.\n");
- return 0;
- }
- pid->hide_pid = option;
- break;
- default:
- pr_err("proc: unrecognized mount option \"%s\" "
- "or missing value\n", p);
- return 0;
- }
- }
-
- return 1;
-}
-
-int proc_remount(struct super_block *sb, int *flags, char *data)
-{
- struct pid_namespace *pid = sb->s_fs_info;
- return !proc_parse_options(data, pid);
-}
-
-static struct dentry *proc_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
-{
- int err;
- struct super_block *sb;
- struct pid_namespace *ns;
- struct proc_inode *ei;
- char *options;
-
- if (flags & MS_KERNMOUNT) {
- ns = (struct pid_namespace *)data;
- options = NULL;
- } else {
- ns = current->nsproxy->pid_ns;
- options = data;
- }
-
- sb = sget(fs_type, proc_test_super, proc_set_super, ns);
- if (IS_ERR(sb))
- return ERR_CAST(sb);
-
- if (!proc_parse_options(options, ns)) {
- deactivate_locked_super(sb);
- return ERR_PTR(-EINVAL);
- }
-
- if (!sb->s_root) {
- sb->s_flags = flags;
- err = proc_fill_super(sb);
- if (err) {
- deactivate_locked_super(sb);
- return ERR_PTR(err);
- }
-
- sb->s_flags |= MS_ACTIVE;
- }
-
- ei = PROC_I(sb->s_root->d_inode);
- if (!ei->pid) {
- rcu_read_lock();
- ei->pid = get_pid(find_pid_ns(1, ns));
- rcu_read_unlock();
- }
-
- return dget(sb->s_root);
-}
-
-static void proc_kill_sb(struct super_block *sb)
-{
- struct pid_namespace *ns;
-
- ns = (struct pid_namespace *)sb->s_fs_info;
- kill_anon_super(sb);
- put_pid_ns(ns);
-}
-
-static struct file_system_type proc_fs_type = {
- .name = "proc",
- .mount = proc_mount,
- .kill_sb = proc_kill_sb,
-};
-
-void __init proc_root_init(void)
-{
- int err;
-
- proc_init_inodecache();
- err = register_filesystem(&proc_fs_type);
- if (err)
- return;
- err = pid_ns_prepare_proc(&init_pid_ns);
- if (err) {
- unregister_filesystem(&proc_fs_type);
- return;
- }
-
- proc_symlink("mounts", NULL, "self/mounts");
-
- proc_net_init();
-
-#ifdef CONFIG_SYSVIPC
- proc_mkdir("sysvipc", NULL);
-#endif
- proc_mkdir("fs", NULL);
- 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_mkdir("bus", NULL);
- proc_sys_init();
-}
-
-static int proc_root_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat
-)
-{
- generic_fillattr(dentry->d_inode, stat);
- stat->nlink = proc_root.nlink + nr_processes();
- return 0;
-}
-
-static struct dentry *proc_root_lookup(struct inode * dir, struct dentry * dentry, struct nameidata *nd)
-{
- 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;
-
- if (nr < FIRST_PROCESS_ENTRY) {
- int error = proc_readdir(filp, dirent, filldir);
- if (error <= 0)
- return error;
- filp->f_pos = FIRST_PROCESS_ENTRY;
- }
-
- 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 const struct file_operations proc_root_operations = {
- .read = generic_read_dir,
- .readdir = proc_root_readdir,
- .llseek = default_llseek,
-};
-
-/*
- * proc root can do almost nothing..
- */
-static const struct inode_operations proc_root_inode_operations = {
- .lookup = proc_root_lookup,
- .getattr = proc_root_getattr,
-};
-
-/*
- * This is the root "inode" in the /proc tree..
- */
-struct proc_dir_entry proc_root = {
- .low_ino = PROC_ROOT_INO,
- .namelen = 5,
- .mode = S_IFDIR | S_IRUGO | S_IXUGO,
- .nlink = 2,
- .count = ATOMIC_INIT(1),
- .proc_iops = &proc_root_inode_operations,
- .proc_fops = &proc_root_operations,
- .parent = &proc_root,
- .name = "/proc",
-};
-
-int pid_ns_prepare_proc(struct pid_namespace *ns)
-{
- struct vfsmount *mnt;
-
- mnt = kern_mount_data(&proc_fs_type, ns);
- if (IS_ERR(mnt))
- return PTR_ERR(mnt);
-
- ns->proc_mnt = mnt;
- return 0;
-}
-
-void pid_ns_release_proc(struct pid_namespace *ns)
-{
- kern_unmount(ns->proc_mnt);
-}