#include <linux/mount.h>
#include <linux/security.h>
#include <linux/ptrace.h>
+#include <linux/cgroup.h>
#include <linux/cpuset.h>
#include <linux/audit.h>
#include <linux/poll.h>
#include <linux/nsproxy.h>
#include <linux/oom.h>
#include <linux/elf.h>
+#include <linux/pid_namespace.h>
#include "internal.h"
/* NOTE:
(task->state == TASK_STOPPED || task->state == TASK_TRACED) && \
security_ptrace(current,task) == 0))
-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;
-
- res = -ESRCH;
- if (!ptrace_may_attach(task))
- goto out;
-
- 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);
-out:
- mmput(mm);
- }
- return res;
-}
-
static int proc_pid_cmdline(struct task_struct *task, char * buffer)
{
int res = 0;
return sprintf(buffer, "%llu %llu %lu\n",
task->sched_info.cpu_time,
task->sched_info.run_delay,
- task->sched_info.pcnt);
+ task->sched_info.pcount);
}
#endif
static int mounts_open(struct inode *inode, struct file *file)
{
struct task_struct *task = get_proc_task(inode);
+ struct nsproxy *nsp;
struct mnt_namespace *ns = NULL;
struct proc_mounts *p;
int ret = -EINVAL;
if (task) {
- task_lock(task);
- if (task->nsproxy) {
- ns = task->nsproxy->mnt_ns;
+ rcu_read_lock();
+ nsp = task_nsproxy(task);
+ if (nsp) {
+ ns = nsp->mnt_ns;
if (ns)
get_mnt_ns(ns);
}
- task_unlock(task);
+ rcu_read_unlock();
+
put_task_struct(task);
}
if (!ret) {
struct seq_file *m = file->private_data;
+ struct nsproxy *nsp;
struct mnt_namespace *mnt_ns = NULL;
struct task_struct *task = get_proc_task(inode);
if (task) {
- task_lock(task);
- if (task->nsproxy)
- mnt_ns = task->nsproxy->mnt_ns;
- if (mnt_ns)
- get_mnt_ns(mnt_ns);
- task_unlock(task);
+ rcu_read_lock();
+ nsp = task_nsproxy(task);
+ if (nsp) {
+ mnt_ns = nsp->mnt_ns;
+ if (mnt_ns)
+ get_mnt_ns(mnt_ns);
+ }
+ rcu_read_unlock();
+
put_task_struct(task);
}
count = PROC_BLOCK_SIZE;
length = -ENOMEM;
- if (!(page = __get_free_page(GFP_KERNEL)))
+ if (!(page = __get_free_page(GFP_TEMPORARY)))
goto out;
length = PROC_I(inode)->op.proc_read(task, (char*)page);
goto out;
ret = -ENOMEM;
- page = (char *)__get_free_page(GFP_USER);
+ page = (char *)__get_free_page(GFP_TEMPORARY);
if (!page)
goto out;
goto out;
copied = -ENOMEM;
- page = (char *)__get_free_page(GFP_USER);
+ page = (char *)__get_free_page(GFP_TEMPORARY);
if (!page)
goto out;
.open = mem_open,
};
+static ssize_t environ_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct task_struct *task = get_proc_task(file->f_dentry->d_inode);
+ char *page;
+ unsigned long src = *ppos;
+ int ret = -ESRCH;
+ struct mm_struct *mm;
+
+ if (!task)
+ goto out_no_task;
+
+ if (!ptrace_may_attach(task))
+ goto out;
+
+ ret = -ENOMEM;
+ page = (char *)__get_free_page(GFP_TEMPORARY);
+ if (!page)
+ goto out;
+
+ ret = 0;
+
+ mm = get_task_mm(task);
+ if (!mm)
+ goto out_free;
+
+ while (count > 0) {
+ int this_len, retval, max_len;
+
+ this_len = mm->env_end - (mm->env_start + src);
+
+ if (this_len <= 0)
+ break;
+
+ max_len = (count > PAGE_SIZE) ? PAGE_SIZE : count;
+ this_len = (this_len > max_len) ? max_len : this_len;
+
+ retval = access_process_vm(task, (mm->env_start + src),
+ page, this_len, 0);
+
+ if (retval <= 0) {
+ ret = retval;
+ break;
+ }
+
+ if (copy_to_user(buf, page, retval)) {
+ ret = -EFAULT;
+ break;
+ }
+
+ ret += retval;
+ src += retval;
+ buf += retval;
+ count -= retval;
+ }
+ *ppos = src;
+
+ mmput(mm);
+out_free:
+ free_page((unsigned long) page);
+out:
+ put_task_struct(task);
+out_no_task:
+ return ret;
+}
+
+static const struct file_operations proc_environ_operations = {
+ .read = environ_read,
+};
+
static ssize_t oom_adjust_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
/* No partial writes. */
return -EINVAL;
}
- page = (char*)__get_free_page(GFP_USER);
+ page = (char*)__get_free_page(GFP_TEMPORARY);
if (!page)
return -ENOMEM;
length = -EFAULT;
char __user *buffer, int buflen)
{
struct inode * inode;
- char *tmp = (char*)__get_free_page(GFP_KERNEL), *path;
+ char *tmp = (char*)__get_free_page(GFP_TEMPORARY);
+ char *path;
int len;
if (!tmp)
goto out;
length = -ENOMEM;
- page = (char*)__get_free_page(GFP_USER);
+ page = (char*)__get_free_page(GFP_TEMPORARY);
if (!page)
goto out;
DIR("task", S_IRUGO|S_IXUGO, task),
DIR("fd", S_IRUSR|S_IXUSR, fd),
DIR("fdinfo", S_IRUSR|S_IXUSR, fdinfo),
- INF("environ", S_IRUSR, pid_environ),
+ REG("environ", S_IRUSR, environ),
INF("auxv", S_IRUSR, pid_auxv),
INF("status", S_IRUGO, pid_status),
#ifdef CONFIG_SCHED_DEBUG
#ifdef CONFIG_SCHEDSTATS
INF("schedstat", S_IRUGO, pid_schedstat),
#endif
-#ifdef CONFIG_CPUSETS
+#ifdef CONFIG_PROC_PID_CPUSET
REG("cpuset", S_IRUGO, cpuset),
+#endif
+#ifdef CONFIG_CGROUPS
+ REG("cgroup", S_IRUGO, cgroup),
#endif
INF("oom_score", S_IRUGO, oom_score),
REG("oom_adj", S_IRUGO|S_IWUSR, oom_adjust),
* that no dcache entries will exist at process exit time it
* just makes it very unlikely that any will persist.
*/
-void proc_flush_task(struct task_struct *task)
+static void proc_flush_task_mnt(struct vfsmount *mnt, pid_t pid, pid_t tgid)
{
struct dentry *dentry, *leader, *dir;
char buf[PROC_NUMBUF];
struct qstr name;
name.name = buf;
- name.len = snprintf(buf, sizeof(buf), "%d", task->pid);
- dentry = d_hash_and_lookup(proc_mnt->mnt_root, &name);
+ name.len = snprintf(buf, sizeof(buf), "%d", pid);
+ dentry = d_hash_and_lookup(mnt->mnt_root, &name);
if (dentry) {
shrink_dcache_parent(dentry);
d_drop(dentry);
dput(dentry);
}
- if (thread_group_leader(task))
+ if (tgid == 0)
goto out;
name.name = buf;
- name.len = snprintf(buf, sizeof(buf), "%d", task->tgid);
- leader = d_hash_and_lookup(proc_mnt->mnt_root, &name);
+ name.len = snprintf(buf, sizeof(buf), "%d", tgid);
+ leader = d_hash_and_lookup(mnt->mnt_root, &name);
if (!leader)
goto out;
goto out_put_leader;
name.name = buf;
- name.len = snprintf(buf, sizeof(buf), "%d", task->pid);
+ name.len = snprintf(buf, sizeof(buf), "%d", pid);
dentry = d_hash_and_lookup(dir, &name);
if (dentry) {
shrink_dcache_parent(dentry);
return;
}
+/*
+ * when flushing dentries from proc one need to flush them from global
+ * proc (proc_mnt) and from all the namespaces' procs this task was seen
+ * in. this call is supposed to make all this job.
+ */
+
+void proc_flush_task(struct task_struct *task)
+{
+ int i, leader;
+ struct pid *pid, *tgid;
+ struct upid *upid;
+
+ leader = thread_group_leader(task);
+ proc_flush_task_mnt(proc_mnt, task->pid, leader ? task->tgid : 0);
+ pid = task_pid(task);
+ if (pid->level == 0)
+ return;
+
+ tgid = task_tgid(task);
+ for (i = 1; i <= pid->level; i++) {
+ upid = &pid->numbers[i];
+ proc_flush_task_mnt(upid->ns->proc_mnt, upid->nr,
+ leader ? 0 : tgid->numbers[i].nr);
+ }
+
+ upid = &pid->numbers[pid->level];
+ if (upid->nr == 1)
+ pid_ns_release_proc(upid->ns);
+}
+
static struct dentry *proc_pid_instantiate(struct inode *dir,
struct dentry * dentry,
struct task_struct *task, const void *ptr)
rcu_read_lock();
retry:
task = NULL;
- pid = find_ge_pid(tgid);
+ pid = find_ge_pid(tgid, &init_pid_ns);
if (pid) {
tgid = pid->nr + 1;
task = pid_task(pid, PIDTYPE_PID);
static const struct pid_entry tid_base_stuff[] = {
DIR("fd", S_IRUSR|S_IXUSR, fd),
DIR("fdinfo", S_IRUSR|S_IXUSR, fdinfo),
- INF("environ", S_IRUSR, pid_environ),
+ REG("environ", S_IRUSR, environ),
INF("auxv", S_IRUSR, pid_auxv),
INF("status", S_IRUGO, pid_status),
#ifdef CONFIG_SCHED_DEBUG
#ifdef CONFIG_SCHEDSTATS
INF("schedstat", S_IRUGO, pid_schedstat),
#endif
-#ifdef CONFIG_CPUSETS
+#ifdef CONFIG_PROC_PID_CPUSET
REG("cpuset", S_IRUGO, cpuset),
+#endif
+#ifdef CONFIG_CGROUPS
+ REG("cgroup", S_IRUGO, cgroup),
#endif
INF("oom_score", S_IRUGO, oom_score),
REG("oom_adj", S_IRUGO|S_IWUSR, oom_adjust),
/* f_version caches the tgid value that the last readdir call couldn't
* return. lseek aka telldir automagically resets f_version to 0.
*/
- tid = filp->f_version;
+ tid = (int)filp->f_version;
filp->f_version = 0;
for (task = first_tid(leader, tid, pos - 2);
task;
if (proc_task_fill_cache(filp, dirent, filldir, task, tid) < 0) {
/* returning this tgid failed, save it as the first
* pid for the next readir call */
- filp->f_version = tid;
+ filp->f_version = (u64)tid;
put_task_struct(task);
break;
}
projects / mirror_ubuntu-hirsute-kernel.git / blobdiff