Release 4.17 fs/proc/generic.c
/*
* 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/cache.h>
#include <linux/errno.h>
#include <linux/time.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/namei.h>
#include <linux/slab.h>
#include <linux/printk.h>
#include <linux/mount.h>
#include <linux/init.h>
#include <linux/idr.h>
#include <linux/bitops.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/uaccess.h>
#include "internal.h"
static DEFINE_RWLOCK(proc_subdir_lock);
struct kmem_cache *proc_dir_entry_cache __ro_after_init;
void pde_free(struct proc_dir_entry *pde)
{
if (S_ISLNK(pde->mode))
kfree(pde->data);
if (pde->name != pde->inline_name)
kfree(pde->name);
kmem_cache_free(proc_dir_entry_cache, pde);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Alexey Dobriyan | 50 | 100.00% | 1 | 100.00% |
Total | 50 | 100.00% | 1 | 100.00% |
static int proc_match(const char *name, struct proc_dir_entry *de, unsigned int len)
{
if (len < de->namelen)
return -1;
if (len > de->namelen)
return 1;
return memcmp(name, de->name, len);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 36 | 65.45% | 1 | 25.00% |
Nicolas Dichtel | 14 | 25.45% | 1 | 25.00% |
Alexey Dobriyan | 4 | 7.27% | 1 | 25.00% |
Eric W. Biedermann | 1 | 1.82% | 1 | 25.00% |
Total | 55 | 100.00% | 4 | 100.00% |
static struct proc_dir_entry *pde_subdir_first(struct proc_dir_entry *dir)
{
return rb_entry_safe(rb_first(&dir->subdir), struct proc_dir_entry,
subdir_node);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Nicolas Dichtel | 29 | 96.67% | 2 | 66.67% |
Alexey Dobriyan | 1 | 3.33% | 1 | 33.33% |
Total | 30 | 100.00% | 3 | 100.00% |
static struct proc_dir_entry *pde_subdir_next(struct proc_dir_entry *dir)
{
return rb_entry_safe(rb_next(&dir->subdir_node), struct proc_dir_entry,
subdir_node);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Nicolas Dichtel | 30 | 100.00% | 2 | 100.00% |
Total | 30 | 100.00% | 2 | 100.00% |
static struct proc_dir_entry *pde_subdir_find(struct proc_dir_entry *dir,
const char *name,
unsigned int len)
{
struct rb_node *node = dir->subdir.rb_node;
while (node) {
struct proc_dir_entry *de = rb_entry(node,
struct proc_dir_entry,
subdir_node);
int result = proc_match(name, de, len);
if (result < 0)
node = node->rb_left;
else if (result > 0)
node = node->rb_right;
else
return de;
}
return NULL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Nicolas Dichtel | 95 | 96.94% | 1 | 33.33% |
Alexey Dobriyan | 2 | 2.04% | 1 | 33.33% |
Geliang Tang | 1 | 1.02% | 1 | 33.33% |
Total | 98 | 100.00% | 3 | 100.00% |
static bool pde_subdir_insert(struct proc_dir_entry *dir,
struct proc_dir_entry *de)
{
struct rb_root *root = &dir->subdir;
struct rb_node **new = &root->rb_node, *parent = NULL;
/* Figure out where to put new node */
while (*new) {
struct proc_dir_entry *this = rb_entry(*new,
struct proc_dir_entry,
subdir_node);
int result = proc_match(de->name, this, de->namelen);
parent = *new;
if (result < 0)
new = &(*new)->rb_left;
else if (result > 0)
new = &(*new)->rb_right;
else
return false;
}
/* Add new node and rebalance tree. */
rb_link_node(&de->subdir_node, parent, new);
rb_insert_color(&de->subdir_node, root);
return true;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Nicolas Dichtel | 143 | 95.33% | 1 | 25.00% |
Alexey Dobriyan | 6 | 4.00% | 2 | 50.00% |
Geliang Tang | 1 | 0.67% | 1 | 25.00% |
Total | 150 | 100.00% | 4 | 100.00% |
static int proc_notify_change(struct dentry *dentry, struct iattr *iattr)
{
struct inode *inode = d_inode(dentry);
struct proc_dir_entry *de = PDE(inode);
int error;
error = setattr_prepare(dentry, iattr);
if (error)
return error;
setattr_copy(inode, iattr);
mark_inode_dirty(inode);
proc_set_user(de, inode->i_uid, inode->i_gid);
de->mode = inode->i_mode;
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Olaf Dietsche | 51 | 56.04% | 1 | 16.67% |
Christoph Hellwig | 16 | 17.58% | 1 | 16.67% |
Chris Wright | 14 | 15.38% | 1 | 16.67% |
Rui Xiang | 5 | 5.49% | 1 | 16.67% |
David Howells | 3 | 3.30% | 1 | 16.67% |
Jan Kara | 2 | 2.20% | 1 | 16.67% |
Total | 91 | 100.00% | 6 | 100.00% |
static int proc_getattr(const struct path *path, struct kstat *stat,
u32 request_mask, unsigned int query_flags)
{
struct inode *inode = d_inode(path->dentry);
struct proc_dir_entry *de = PDE(inode);
if (de && de->nlink)
set_nlink(inode, de->nlink);
generic_fillattr(inode, stat);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Miklos Szeredi | 57 | 78.08% | 2 | 40.00% |
David Howells | 15 | 20.55% | 2 | 40.00% |
Alexander Kuleshov | 1 | 1.37% | 1 | 20.00% |
Total | 73 | 100.00% | 5 | 100.00% |
static const 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;
unsigned int len;
de = *ret;
if (!de)
de = &proc_root;
while (1) {
next = strchr(cp, '/');
if (!next)
break;
len = next - cp;
de = pde_subdir_find(de, cp, len);
if (!de) {
WARN(1, "name '%s'\n", name);
return -ENOENT;
}
cp += len + 1;
}
*residual = cp;
*ret = de;
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 101 | 75.37% | 1 | 14.29% |
Alexey Dobriyan | 28 | 20.90% | 4 | 57.14% |
Nicolas Dichtel | 4 | 2.99% | 1 | 14.29% |
Steven Rostedt | 1 | 0.75% | 1 | 14.29% |
Total | 134 | 100.00% | 7 | 100.00% |
static int xlate_proc_name(const char *name, struct proc_dir_entry **ret,
const char **residual)
{
int rv;
read_lock(&proc_subdir_lock);
rv = __xlate_proc_name(name, ret, residual);
read_unlock(&proc_subdir_lock);
return rv;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Alexey Dobriyan | 42 | 80.77% | 1 | 25.00% |
Steven Rostedt | 5 | 9.62% | 1 | 25.00% |
Linus Torvalds (pre-git) | 3 | 5.77% | 1 | 25.00% |
Waiman Long | 2 | 3.85% | 1 | 25.00% |
Total | 52 | 100.00% | 4 | 100.00% |
static DEFINE_IDA(proc_inum_ida);
#define PROC_DYNAMIC_FIRST 0xF0000000U
/*
* Return an inode number between PROC_DYNAMIC_FIRST and
* 0xffffffff, or zero on failure.
*/
int proc_alloc_inum(unsigned int *inum)
{
int i;
i = ida_simple_get(&proc_inum_ida, 0, UINT_MAX - PROC_DYNAMIC_FIRST + 1,
GFP_KERNEL);
if (i < 0)
return i;
*inum = PROC_DYNAMIC_FIRST + (unsigned int)i;
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Heiner Kallweit | 17 | 31.48% | 1 | 11.11% |
Eric W. Biedermann | 12 | 22.22% | 1 | 11.11% |
Linus Torvalds (pre-git) | 9 | 16.67% | 1 | 11.11% |
Alexey Dobriyan | 7 | 12.96% | 3 | 33.33% |
Andrew Morton | 5 | 9.26% | 1 | 11.11% |
Linus Torvalds | 3 | 5.56% | 1 | 11.11% |
Corey Minyard | 1 | 1.85% | 1 | 11.11% |
Total | 54 | 100.00% | 9 | 100.00% |
void proc_free_inum(unsigned int inum)
{
ida_simple_remove(&proc_inum_ida, inum - PROC_DYNAMIC_FIRST);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Morton | 11 | 57.89% | 1 | 14.29% |
Alexey Dobriyan | 4 | 21.05% | 2 | 28.57% |
Linus Torvalds (pre-git) | 1 | 5.26% | 1 | 14.29% |
Heiner Kallweit | 1 | 5.26% | 1 | 14.29% |
Linus Torvalds | 1 | 5.26% | 1 | 14.29% |
Eric W. Biedermann | 1 | 5.26% | 1 | 14.29% |
Total | 19 | 100.00% | 7 | 100.00% |
static int proc_misc_d_revalidate(struct dentry *dentry, unsigned int flags)
{
if (flags & LOOKUP_RCU)
return -ECHILD;
if (atomic_read(&PDE(d_inode(dentry))->in_use) < 0)
return 0; /* revalidate */
return 1;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Alexey Dobriyan | 50 | 100.00% | 1 | 100.00% |
Total | 50 | 100.00% | 1 | 100.00% |
static int proc_misc_d_delete(const struct dentry *dentry)
{
return atomic_read(&PDE(d_inode(dentry))->in_use) < 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Alexey Dobriyan | 29 | 100.00% | 1 | 100.00% |
Total | 29 | 100.00% | 1 | 100.00% |
static const struct dentry_operations proc_misc_dentry_ops = {
.d_revalidate = proc_misc_d_revalidate,
.d_delete = proc_misc_d_delete,
};
/*
* Don't create negative dentries here, return -ENOENT by hand
* instead.
*/
struct dentry *proc_lookup_de(struct inode *dir, struct dentry *dentry,
struct proc_dir_entry *de)
{
struct inode *inode;
read_lock(&proc_subdir_lock);
de = pde_subdir_find(de, dentry->d_name.name, dentry->d_name.len);
if (de) {
pde_get(de);
read_unlock(&proc_subdir_lock);
inode = proc_get_inode(dir->i_sb, de);
if (!inode)
return ERR_PTR(-ENOMEM);
d_set_d_op(dentry, &proc_misc_dentry_ops);
d_add(dentry, inode);
return NULL;
}
read_unlock(&proc_subdir_lock);
return ERR_PTR(-ENOENT);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 68 | 55.28% | 1 | 8.33% |
Nicolas Dichtel | 15 | 12.20% | 1 | 8.33% |
Alexey Dobriyan | 14 | 11.38% | 4 | 33.33% |
Al Viro | 13 | 10.57% | 2 | 16.67% |
Steven Rostedt | 5 | 4.07% | 1 | 8.33% |
Nicholas Piggin | 4 | 3.25% | 1 | 8.33% |
Waiman Long | 3 | 2.44% | 1 | 8.33% |
Pavel Emelyanov | 1 | 0.81% | 1 | 8.33% |
Total | 123 | 100.00% | 12 | 100.00% |
struct dentry *proc_lookup(struct inode *dir, struct dentry *dentry,
unsigned int flags)
{
return proc_lookup_de(dir, dentry, PDE(dir));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Pavel Emelyanov | 27 | 79.41% | 1 | 33.33% |
Alexey Dobriyan | 4 | 11.76% | 1 | 33.33% |
Al Viro | 3 | 8.82% | 1 | 33.33% |
Total | 34 | 100.00% | 3 | 100.00% |
/*
* 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_de(struct file *file, struct dir_context *ctx,
struct proc_dir_entry *de)
{
int i;
if (!dir_emit_dots(file, ctx))
return 0;
read_lock(&proc_subdir_lock);
de = pde_subdir_first(de);
i = ctx->pos - 2;
for (;;) {
if (!de) {
read_unlock(&proc_subdir_lock);
return 0;
}
if (!i)
break;
de = pde_subdir_next(de);
i--;
}
do {
struct proc_dir_entry *next;
pde_get(de);
read_unlock(&proc_subdir_lock);
if (!dir_emit(ctx, de->name, de->namelen,
de->low_ino, de->mode >> 12)) {
pde_put(de);
return 0;
}
read_lock(&proc_subdir_lock);
ctx->pos++;
next = pde_subdir_next(de);
pde_put(de);
de = next;
} while (de);
read_unlock(&proc_subdir_lock);
return 1;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 90 | 46.88% | 2 | 16.67% |
Al Viro | 26 | 13.54% | 1 | 8.33% |
Steven Rostedt | 25 | 13.02% | 1 | 8.33% |
Darrick J. Wong | 24 | 12.50% | 1 | 8.33% |
Nicolas Dichtel | 9 | 4.69% | 1 | 8.33% |
Alexey Dobriyan | 8 | 4.17% | 2 | 16.67% |
Waiman Long | 5 | 2.60% | 1 | 8.33% |
Dave Hansen | 3 | 1.56% | 1 | 8.33% |
Linus Torvalds | 1 | 0.52% | 1 | 8.33% |
Pavel Emelyanov | 1 | 0.52% | 1 | 8.33% |
Total | 192 | 100.00% | 12 | 100.00% |
int proc_readdir(struct file *file, struct dir_context *ctx)
{
struct inode *inode = file_inode(file);
return proc_readdir_de(file, ctx, PDE(inode));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Pavel Emelyanov | 26 | 68.42% | 1 | 25.00% |
Al Viro | 8 | 21.05% | 2 | 50.00% |
Alexey Dobriyan | 4 | 10.53% | 1 | 25.00% |
Total | 38 | 100.00% | 4 | 100.00% |
/*
* These are the generic /proc directory operations. They
* use the in-memory "struct proc_dir_entry" tree to parse
* the /proc directory.
*/
static const struct file_operations proc_dir_operations = {
.llseek = generic_file_llseek,
.read = generic_read_dir,
.iterate_shared = proc_readdir,
};
/*
* proc directories can do almost nothing..
*/
static const struct inode_operations proc_dir_inode_operations = {
.lookup = proc_lookup,
.getattr = proc_getattr,
.setattr = proc_notify_change,
};
static int proc_register(struct proc_dir_entry * dir, struct proc_dir_entry * dp)
{
int ret;
ret = proc_alloc_inum(&dp->low_ino);
if (ret)
return ret;
write_lock(&proc_subdir_lock);
dp->parent = dir;
if (pde_subdir_insert(dir, dp) == false) {
WARN(1, "proc_dir_entry '%s/%s' already registered\n",
dir->name, dp->name);
write_unlock(&proc_subdir_lock);
proc_free_inum(dp->low_ino);
return -EEXIST;
}
write_unlock(&proc_subdir_lock);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 26 | 25.49% | 2 | 20.00% |
Debabrata Banerjee | 18 | 17.65% | 1 | 10.00% |
Rui Zhang | 17 | 16.67% | 1 | 10.00% |
Eric W. Biedermann | 13 | 12.75% | 1 | 10.00% |
Changli Gao | 10 | 9.80% | 1 | 10.00% |
Nicolas Dichtel | 7 | 6.86% | 1 | 10.00% |
Alexey Dobriyan | 5 | 4.90% | 1 | 10.00% |
Arjan van de Ven | 3 | 2.94% | 1 | 10.00% |
Waiman Long | 3 | 2.94% | 1 | 10.00% |
Total | 102 | 100.00% | 10 | 100.00% |
static struct proc_dir_entry *__proc_create(struct proc_dir_entry **parent,
const char *name,
umode_t mode,
nlink_t nlink)
{
struct proc_dir_entry *ent = NULL;
const char *fn;
struct qstr qstr;
if (xlate_proc_name(name, parent, &fn) != 0)
goto out;
qstr.name = fn;
qstr.len = strlen(fn);
if (qstr.len == 0 || qstr.len >= 256) {
WARN(1, "name len %u\n", qstr.len);
return NULL;
}
if (qstr.len == 1 && fn[0] == '.') {
WARN(1, "name '.'\n");
return NULL;
}
if (qstr.len == 2 && fn[0] == '.' && fn[1] == '.') {
WARN(1, "name '..'\n");
return NULL;
}
if (*parent == &proc_root && name_to_int(&qstr) != ~0U) {
WARN(1, "create '/proc/%s' by hand\n", qstr.name);
return NULL;
}
if (is_empty_pde(*parent)) {
WARN(1, "attempt to add to permanently empty directory");
return NULL;
}
ent = kmem_cache_zalloc(proc_dir_entry_cache, GFP_KERNEL);
if (!ent)
goto out;
if (qstr.len + 1 <= sizeof(ent->inline_name)) {
ent->name = ent->inline_name;
} else {
ent->name = kmalloc(qstr.len + 1, GFP_KERNEL);
if (!ent->name) {
pde_free(ent);
return NULL;
}
}
memcpy(ent->name, fn, qstr.len + 1);
ent->namelen = qstr.len;
ent->mode = mode;
ent->nlink = nlink;
ent->subdir = RB_ROOT;
refcount_set(&ent->refcnt, 1);
spin_lock_init(&ent->pde_unload_lock);
INIT_LIST_HEAD(&ent->pde_openers);
proc_set_user(ent, (*parent)->uid, (*parent)->gid);
out:
return ent;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Alexey Dobriyan | 224 | 58.18% | 9 | 50.00% |
Linus Torvalds (pre-git) | 86 | 22.34% | 2 | 11.11% |
Linus Torvalds | 22 | 5.71% | 1 | 5.56% |
Eric W. Biedermann | 20 | 5.19% | 1 | 5.56% |
Dmitry Torokhov | 19 | 4.94% | 1 | 5.56% |
Nathan Lynch | 6 | 1.56% | 1 | 5.56% |
Nicolas Dichtel | 5 | 1.30% | 1 | 5.56% |
David Howells | 2 | 0.52% | 1 | 5.56% |
Al Viro | 1 | 0.26% | 1 | 5.56% |
Total | 385 | 100.00% | 18 | 100.00% |
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);
ent->proc_iops = &proc_link_inode_operations;
if (proc_register(parent, ent) < 0) {
pde_free(ent);
ent = NULL;
}
} else {
pde_free(ent);
ent = NULL;
}
}
return ent;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 62 | 43.66% | 1 | 16.67% |
Linus Torvalds | 56 | 39.44% | 1 | 16.67% |
Jeff Garzik | 14 | 9.86% | 1 | 16.67% |
Al Viro | 7 | 4.93% | 1 | 16.67% |
Alexey Dobriyan | 3 | 2.11% | 2 | 33.33% |
Total | 142 | 100.00% | 6 | 100.00% |
EXPORT_SYMBOL(proc_symlink);
struct proc_dir_entry *proc_mkdir_data(const char *name, umode_t mode,
struct proc_dir_entry *parent, void *data)
{
struct proc_dir_entry *ent;
if (mode == 0)
mode = S_IRUGO | S_IXUGO;
ent = __proc_create(&parent, name, S_IFDIR | mode, 2);
if (ent) {
ent->data = data;
ent->proc_fops = &proc_dir_operations;
ent->proc_iops = &proc_dir_inode_operations;
parent->nlink++;
if (proc_register(parent, ent) < 0) {
pde_free(ent);
parent->nlink--;
ent = NULL;
}
}
return ent;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds | 30 | 25.42% | 1 | 11.11% |
Al Viro | 25 | 21.19% | 2 | 22.22% |
David Howells | 23 | 19.49% | 1 | 11.11% |
Linus Torvalds (pre-git) | 21 | 17.80% | 1 | 11.11% |
Jeff Garzik | 14 | 11.86% | 1 | 11.11% |
Andrew Morton | 3 | 2.54% | 1 | 11.11% |
Alexey Dobriyan | 2 | 1.69% | 2 | 22.22% |
Total | 118 | 100.00% | 9 | 100.00% |
EXPORT_SYMBOL_GPL(proc_mkdir_data);
struct proc_dir_entry *proc_mkdir_mode(const char *name, umode_t mode,
struct proc_dir_entry *parent)
{
return proc_mkdir_data(name, mode, parent, NULL);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Denis V. Lunev | 24 | 75.00% | 1 | 50.00% |
David Howells | 8 | 25.00% | 1 | 50.00% |
Total | 32 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL(proc_mkdir_mode);
struct proc_dir_entry *proc_mkdir(const char *name,
struct proc_dir_entry *parent)
{
return proc_mkdir_data(name, 0, parent, NULL);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Morton | 25 | 86.21% | 1 | 50.00% |
David Howells | 4 | 13.79% | 1 | 50.00% |
Total | 29 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL(proc_mkdir);
struct proc_dir_entry *proc_create_mount_point(const char *name)
{
umode_t mode = S_IFDIR | S_IRUGO | S_IXUGO;
struct proc_dir_entry *ent, *parent = NULL;
ent = __proc_create(&parent, name, mode, 2);
if (ent) {
ent->data = NULL;
ent->proc_fops = NULL;
ent->proc_iops = NULL;
parent->nlink++;
if (proc_register(parent, ent) < 0) {
pde_free(ent);
parent->nlink--;
ent = NULL;
}
}
return ent;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Eric W. Biedermann | 98 | 94.23% | 1 | 33.33% |
Takashi Iwai | 5 | 4.81% | 1 | 33.33% |
Alexey Dobriyan | 1 | 0.96% | 1 | 33.33% |
Total | 104 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL(proc_create_mount_point);
struct proc_dir_entry *proc_create_data(const char *name, umode_t mode,
struct proc_dir_entry *parent,
const struct file_operations *proc_fops,
void *data)
{
struct proc_dir_entry *pde;
if ((mode & S_IFMT) == 0)
mode |= S_IFREG;
if (!S_ISREG(mode)) {
WARN_ON(1); /* use proc_mkdir() */
return NULL;
}
BUG_ON(proc_fops == NULL);
if ((mode & S_IALLUGO) == 0)
mode |= S_IRUGO;
pde = __proc_create(&parent, name, mode, 1);
if (!pde)
goto out;
pde->proc_fops = proc_fops;
pde->data = data;
pde->proc_iops = &proc_file_inode_operations;
if (proc_register(parent, pde) < 0)
goto out_free;
return pde;
out_free:
pde_free(pde);
out:
return NULL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Alexey Dobriyan | 116 | 72.96% | 2 | 33.33% |
Al Viro | 32 | 20.13% | 3 | 50.00% |
Denis V. Lunev | 11 | 6.92% | 1 | 16.67% |
Total | 159 | 100.00% | 6 | 100.00% |
EXPORT_SYMBOL(proc_create_data);
struct proc_dir_entry *proc_create(const char *name, umode_t mode,
struct proc_dir_entry *parent,
const struct file_operations *proc_fops)
{
return proc_create_data(name, mode, parent, proc_fops, NULL);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Alexey Dobriyan | 40 | 100.00% | 1 | 100.00% |
Total | 40 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL(proc_create);
void proc_set_size(struct proc_dir_entry *de, loff_t size)
{
de->size = size;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David Howells | 19 | 100.00% | 1 | 100.00% |
Total | 19 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL(proc_set_size);
void proc_set_user(struct proc_dir_entry *de, kuid_t uid, kgid_t gid)
{
de->uid = uid;
de->gid = gid;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David Howells | 28 | 100.00% | 1 | 100.00% |
Total | 28 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL(proc_set_user);
void pde_put(struct proc_dir_entry *pde)
{
if (refcount_dec_and_test(&pde->refcnt)) {
proc_free_inum(pde->low_ino);
pde_free(pde);
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Alexey Dobriyan | 34 | 100.00% | 3 | 100.00% |
Total | 34 | 100.00% | 3 | 100.00% |
/*
* Remove a /proc entry and free it if it's not currently in use.
*/
void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
{
struct proc_dir_entry *de = NULL;
const char *fn = name;
unsigned int len;
write_lock(&proc_subdir_lock);
if (__xlate_proc_name(name, &parent, &fn) != 0) {
write_unlock(&proc_subdir_lock);
return;
}
len = strlen(fn);
de = pde_subdir_find(parent, fn, len);
if (de)
rb_erase(&de->subdir_node, &parent->subdir);
write_unlock(&proc_subdir_lock);
if (!de) {
WARN(1, "name '%s'\n", name);
return;
}
proc_entry_rundown(de);
if (S_ISDIR(de->mode))
parent->nlink--;
de->nlink = 0;
WARN(pde_subdir_first(de),
"%s: removing non-empty directory '%s/%s', leaking at least '%s'\n",
__func__, de->parent->name, de->name, pde_subdir_first(de)->name);
pde_put(de);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Alexey Dobriyan | 62 | 34.44% | 6 | 46.15% |
Linus Torvalds (pre-git) | 61 | 33.89% | 3 | 23.08% |
Al Viro | 31 | 17.22% | 2 | 15.38% |
Nicolas Dichtel | 23 | 12.78% | 1 | 7.69% |
Waiman Long | 3 | 1.67% | 1 | 7.69% |
Total | 180 | 100.00% | 13 | 100.00% |
EXPORT_SYMBOL(remove_proc_entry);
int remove_proc_subtree(const char *name, struct proc_dir_entry *parent)
{
struct proc_dir_entry *root = NULL, *de, *next;
const char *fn = name;
unsigned int len;
write_lock(&proc_subdir_lock);
if (__xlate_proc_name(name, &parent, &fn) != 0) {
write_unlock(&proc_subdir_lock);
return -ENOENT;
}
len = strlen(fn);
root = pde_subdir_find(parent, fn, len);
if (!root) {
write_unlock(&proc_subdir_lock);
return -ENOENT;
}
rb_erase(&root->subdir_node, &parent->subdir);
de = root;
while (1) {
next = pde_subdir_first(de);
if (next) {
rb_erase(&next->subdir_node, &de->subdir);
de = next;
continue;
}
write_unlock(&proc_subdir_lock);
proc_entry_rundown(de);
next = de->parent;
if (S_ISDIR(de->mode))
next->nlink--;
de->nlink = 0;
if (de == root)
break;
pde_put(de);
write_lock(&proc_subdir_lock);
de = next;
}
pde_put(root);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Al Viro | 133 | 58.33% | 2 | 18.18% |
Alexey Dobriyan | 36 | 15.79% | 3 | 27.27% |
Nicolas Dichtel | 27 | 11.84% | 1 | 9.09% |
Linus Torvalds (pre-git) | 24 | 10.53% | 3 | 27.27% |
Waiman Long | 5 | 2.19% | 1 | 9.09% |
Andrew Morton | 3 | 1.32% | 1 | 9.09% |
Total | 228 | 100.00% | 11 | 100.00% |
EXPORT_SYMBOL(remove_proc_subtree);
void *proc_get_parent_data(const struct inode *inode)
{
struct proc_dir_entry *de = PDE(inode);
return de->parent->data;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David Howells | 29 | 100.00% | 1 | 100.00% |
Total | 29 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(proc_get_parent_data);
void proc_remove(struct proc_dir_entry *de)
{
if (de)
remove_proc_subtree(de->name, de->parent);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David Howells | 25 | 100.00% | 1 | 100.00% |
Total | 25 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL(proc_remove);
void *PDE_DATA(const struct inode *inode)
{
return __PDE_DATA(inode);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David Howells | 18 | 100.00% | 1 | 100.00% |
Total | 18 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL(PDE_DATA);
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Alexey Dobriyan | 827 | 25.80% | 27 | 25.00% |
Linus Torvalds (pre-git) | 633 | 19.75% | 11 | 10.19% |
Nicolas Dichtel | 401 | 12.51% | 2 | 1.85% |
Al Viro | 286 | 8.92% | 11 | 10.19% |
David Howells | 203 | 6.33% | 8 | 7.41% |
Eric W. Biedermann | 145 | 4.52% | 3 | 2.78% |
Linus Torvalds | 114 | 3.56% | 4 | 3.70% |
Olaf Dietsche | 68 | 2.12% | 1 | 0.93% |
Miklos Szeredi | 62 | 1.93% | 2 | 1.85% |
Andrew Morton | 62 | 1.93% | 4 | 3.70% |
Pavel Emelyanov | 55 | 1.72% | 1 | 0.93% |
Steven Rostedt | 43 | 1.34% | 1 | 0.93% |
Denis V. Lunev | 38 | 1.19% | 2 | 1.85% |
Jeff Garzik | 28 | 0.87% | 1 | 0.93% |
Christoph Hellwig | 24 | 0.75% | 2 | 1.85% |
Darrick J. Wong | 24 | 0.75% | 1 | 0.93% |
Waiman Long | 22 | 0.69% | 1 | 0.93% |
Dmitry Torokhov | 19 | 0.59% | 1 | 0.93% |
Zhenwen Xu | 19 | 0.59% | 1 | 0.93% |
Heiner Kallweit | 18 | 0.56% | 1 | 0.93% |
Debabrata Banerjee | 18 | 0.56% | 1 | 0.93% |
Rui Zhang | 17 | 0.53% | 1 | 0.93% |
Chris Wright | 14 | 0.44% | 1 | 0.93% |
Changli Gao | 10 | 0.31% | 1 | 0.93% |
Art Haas | 6 | 0.19% | 1 | 0.93% |
Nathan Lynch | 6 | 0.19% | 1 | 0.93% |
Arjan van de Ven | 6 | 0.19% | 3 | 2.78% |
Rui Xiang | 5 | 0.16% | 1 | 0.93% |
Takashi Iwai | 5 | 0.16% | 1 | 0.93% |
Seth Forshee | 5 | 0.16% | 1 | 0.93% |
Nicholas Piggin | 4 | 0.12% | 1 | 0.93% |
Adrian Bunk | 4 | 0.12% | 2 | 1.85% |
Tejun Heo | 3 | 0.09% | 1 | 0.93% |
Dave Hansen | 3 | 0.09% | 1 | 0.93% |
Geliang Tang | 2 | 0.06% | 1 | 0.93% |
Jan Kara | 2 | 0.06% | 1 | 0.93% |
Américo Wang | 1 | 0.03% | 1 | 0.93% |
Alexander Kuleshov | 1 | 0.03% | 1 | 0.93% |
Dave Jones | 1 | 0.03% | 1 | 0.93% |
Corey Minyard | 1 | 0.03% | 1 | 0.93% |
Total | 3205 | 100.00% | 108 | 100.00% |
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