Release 4.10 fs/proc/root.c
/*
* linux/fs/proc/root.c
*
* Copyright (C) 1991, 1992 Linus Torvalds
*
* proc root directory handling functions
*/
#include <linux/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/user_namespace.h>
#include <linux/mount.h>
#include <linux/pid_namespace.h>
#include <linux/parser.h>
#include "internal.h"
enum {
Opt_gid, Opt_hidepid, Opt_err,
};
static const match_table_t tokens = {
{Opt_hidepid, "hidepid=%u"},
{Opt_gid, "gid=%u"},
{Opt_err, NULL},
};
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 = NULL;
token = match_token(p, tokens, args);
switch (token) {
case Opt_gid:
if (match_int(&args[0], &option))
return 0;
pid->pid_gid = make_kgid(current_user_ns(), 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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
vasiliy kulikov | vasiliy kulikov | 184 | 96.34% | 2 | 50.00% |
eric w. biederman | eric w. biederman | 6 | 3.14% | 1 | 25.00% |
sachin kamat | sachin kamat | 1 | 0.52% | 1 | 25.00% |
| Total | 191 | 100.00% | 4 | 100.00% |
int proc_remount(struct super_block *sb, int *flags, char *data)
{
struct pid_namespace *pid = sb->s_fs_info;
sync_filesystem(sb);
return !proc_parse_options(data, pid);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
vasiliy kulikov | vasiliy kulikov | 36 | 87.80% | 1 | 50.00% |
theodore tso | theodore tso | 5 | 12.20% | 1 | 50.00% |
| Total | 41 | 100.00% | 2 | 100.00% |
static struct dentry *proc_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data)
{
struct pid_namespace *ns;
if (flags & MS_KERNMOUNT) {
ns = data;
data = NULL;
} else {
ns = task_active_pid_ns(current);
}
return mount_ns(fs_type, flags, data, ns, ns->user_ns, proc_fill_super);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
al viro | al viro | 26 | 35.14% | 2 | 18.18% |
pavel emelianov | pavel emelianov | 19 | 25.68% | 1 | 9.09% |
eric w. biederman | eric w. biederman | 12 | 16.22% | 3 | 27.27% |
vasiliy kulikov | vasiliy kulikov | 10 | 13.51% | 2 | 18.18% |
linus torvalds | linus torvalds | 4 | 5.41% | 1 | 9.09% |
david howells | david howells | 2 | 2.70% | 1 | 9.09% |
andries brouwer | andries brouwer | 1 | 1.35% | 1 | 9.09% |
| Total | 74 | 100.00% | 11 | 100.00% |
static void proc_kill_sb(struct super_block *sb)
{
struct pid_namespace *ns;
ns = (struct pid_namespace *)sb->s_fs_info;
if (ns->proc_self)
dput(ns->proc_self);
if (ns->proc_thread_self)
dput(ns->proc_thread_self);
kill_anon_super(sb);
put_pid_ns(ns);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pavel emelianov | pavel emelianov | 37 | 58.73% | 1 | 33.33% |
eric w. biederman | eric w. biederman | 13 | 20.63% | 1 | 33.33% |
al viro | al viro | 13 | 20.63% | 1 | 33.33% |
| Total | 63 | 100.00% | 3 | 100.00% |
static struct file_system_type proc_fs_type = {
.name = "proc",
.mount = proc_mount,
.kill_sb = proc_kill_sb,
.fs_flags = FS_USERNS_MOUNT,
};
void __init proc_root_init(void)
{
int err;
proc_init_inodecache();
set_proc_pid_nlink();
err = register_filesystem(&proc_fs_type);
if (err)
return;
proc_self_init();
proc_thread_self_init();
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_create_mount_point("fs/nfsd"); /* somewhere for the nfsd filesystem to be mounted */
#if defined(CONFIG_SUN_OPENPROMFS) || defined(CONFIG_SUN_OPENPROMFS_MODULE)
/* just give it a mountpoint */
proc_create_mount_point("openprom");
#endif
proc_tty_init();
proc_mkdir("bus", NULL);
proc_sys_init();
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 59 | 52.68% | 11 | 44.00% |
eric w. biederman | eric w. biederman | 13 | 11.61% | 5 | 20.00% |
linus torvalds | linus torvalds | 13 | 11.61% | 2 | 8.00% |
alexey dobriyan | alexey dobriyan | 12 | 10.71% | 3 | 12.00% |
al viro | al viro | 5 | 4.46% | 1 | 4.00% |
neil brown | neil brown | 5 | 4.46% | 1 | 4.00% |
mika kukkonen | mika kukkonen | 4 | 3.57% | 1 | 4.00% |
harald welte | harald welte | 1 | 0.89% | 1 | 4.00% |
| Total | 112 | 100.00% | 25 | 100.00% |
static int proc_root_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat
)
{
generic_fillattr(d_inode(dentry), stat);
stat->nlink = proc_root.nlink + nr_processes();
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
al viro | al viro | 42 | 93.33% | 1 | 50.00% |
david howells | david howells | 3 | 6.67% | 1 | 50.00% |
| Total | 45 | 100.00% | 2 | 100.00% |
static struct dentry *proc_root_lookup(struct inode * dir, struct dentry * dentry, unsigned int flags)
{
if (!proc_pid_lookup(dir, dentry, flags))
return NULL;
return proc_lookup(dir, dentry, flags);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 37 | 78.72% | 6 | 66.67% |
al viro | al viro | 5 | 10.64% | 1 | 11.11% |
trond myklebust | trond myklebust | 3 | 6.38% | 1 | 11.11% |
alexey dobriyan | alexey dobriyan | 2 | 4.26% | 1 | 11.11% |
| Total | 47 | 100.00% | 9 | 100.00% |
static int proc_root_readdir(struct file *file, struct dir_context *ctx)
{
if (ctx->pos < FIRST_PROCESS_ENTRY) {
int error = proc_readdir(file, ctx);
if (unlikely(error <= 0))
return error;
ctx->pos = FIRST_PROCESS_ENTRY;
}
return proc_pid_readdir(file, ctx);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 32 | 51.61% | 7 | 77.78% |
richard genoud | richard genoud | 16 | 25.81% | 1 | 11.11% |
al viro | al viro | 14 | 22.58% | 1 | 11.11% |
| Total | 62 | 100.00% | 9 | 100.00% |
/*
* 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,
.iterate_shared = proc_root_readdir,
.llseek = generic_file_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,
.subdir = RB_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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pavel emelianov | pavel emelianov | 41 | 87.23% | 1 | 50.00% |
al viro | al viro | 6 | 12.77% | 1 | 50.00% |
| Total | 47 | 100.00% | 2 | 100.00% |
void pid_ns_release_proc(struct pid_namespace *ns)
{
kern_unmount(ns->proc_mnt);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pavel emelianov | pavel emelianov | 16 | 94.12% | 1 | 50.00% |
al viro | al viro | 1 | 5.88% | 1 | 50.00% |
| Total | 17 | 100.00% | 2 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
vasiliy kulikov | vasiliy kulikov | 267 | 29.24% | 3 | 3.75% |
pre-git | pre-git | 206 | 22.56% | 23 | 28.75% |
al viro | al viro | 138 | 15.12% | 13 | 16.25% |
pavel emelianov | pavel emelianov | 117 | 12.81% | 2 | 2.50% |
eric w. biederman | eric w. biederman | 55 | 6.02% | 11 | 13.75% |
art haas | art haas | 26 | 2.85% | 1 | 1.25% |
alexey dobriyan | alexey dobriyan | 23 | 2.52% | 6 | 7.50% |
linus torvalds | linus torvalds | 21 | 2.30% | 3 | 3.75% |
richard genoud | richard genoud | 16 | 1.75% | 1 | 1.25% |
david howells | david howells | 10 | 1.10% | 3 | 3.75% |
nicolas dichtel | nicolas dichtel | 5 | 0.55% | 1 | 1.25% |
theodore tso | theodore tso | 5 | 0.55% | 1 | 1.25% |
neil brown | neil brown | 5 | 0.55% | 1 | 1.25% |
mika kukkonen | mika kukkonen | 4 | 0.44% | 1 | 1.25% |
arnd bergmann | arnd bergmann | 4 | 0.44% | 1 | 1.25% |
trond myklebust | trond myklebust | 3 | 0.33% | 1 | 1.25% |
arjan van de ven | arjan van de ven | 2 | 0.22% | 2 | 2.50% |
adrian bunk | adrian bunk | 2 | 0.22% | 2 | 2.50% |
sachin kamat | sachin kamat | 1 | 0.11% | 1 | 1.25% |
dave jones | dave jones | 1 | 0.11% | 1 | 1.25% |
andries brouwer | andries brouwer | 1 | 0.11% | 1 | 1.25% |
harald welte | harald welte | 1 | 0.11% | 1 | 1.25% |
| Total | 913 | 100.00% | 80 | 100.00% |
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