mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 09:46:41 +07:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
162 lines
3.9 KiB
C
162 lines
3.9 KiB
C
/*
|
|
* 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);
|