X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=fs%2Fproc%2Fbase.c;h=991482811f1e7ecd8b9bc91abc4eace6fc2491d6;hb=bac0abd6174e427404dd197cdbefece31e97329b;hp=36983e7bb2c1b6d9f4450af87c8ca35a59b7c1eb;hpb=60347f6716aa49831ac311e04d77ccdc50dc024a;p=linux-2.6

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 36983e7bb2..991482811f 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1937,14 +1937,14 @@ static int proc_self_readlink(struct dentry *dentry, char __user *buffer,
 			      int buflen)
 {
 	char tmp[PROC_NUMBUF];
-	sprintf(tmp, "%d", current->tgid);
+	sprintf(tmp, "%d", task_tgid_vnr(current));
 	return vfs_readlink(dentry,buffer,buflen,tmp);
 }
 
 static void *proc_self_follow_link(struct dentry *dentry, struct nameidata *nd)
 {
 	char tmp[PROC_NUMBUF];
-	sprintf(tmp, "%d", current->tgid);
+	sprintf(tmp, "%d", task_tgid_vnr(current));
 	return ERR_PTR(vfs_follow_link(nd,tmp));
 }
 
@@ -2259,8 +2259,26 @@ out:
 
 void proc_flush_task(struct task_struct *task)
 {
-	proc_flush_task_mnt(proc_mnt, task->pid,
-			thread_group_leader(task) ? 0 : task->tgid);
+	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,
@@ -2298,6 +2316,7 @@ struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct
 	struct dentry *result = ERR_PTR(-ENOENT);
 	struct task_struct *task;
 	unsigned tgid;
+	struct pid_namespace *ns;
 
 	result = proc_base_lookup(dir, dentry);
 	if (!IS_ERR(result) || PTR_ERR(result) != -ENOENT)
@@ -2307,8 +2326,9 @@ struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct
 	if (tgid == ~0U)
 		goto out;
 
+	ns = dentry->d_sb->s_fs_info;
 	rcu_read_lock();
-	task = find_task_by_pid(tgid);
+	task = find_task_by_pid_ns(tgid, ns);
 	if (task)
 		get_task_struct(task);
 	rcu_read_unlock();
@@ -2325,7 +2345,8 @@ out:
  * Find the first task with tgid >= tgid
  *
  */
-static struct task_struct *next_tgid(unsigned int tgid)
+static struct task_struct *next_tgid(unsigned int tgid,
+		struct pid_namespace *ns)
 {
 	struct task_struct *task;
 	struct pid *pid;
@@ -2333,9 +2354,9 @@ static struct task_struct *next_tgid(unsigned int tgid)
 	rcu_read_lock();
 retry:
 	task = NULL;
-	pid = find_ge_pid(tgid);
+	pid = find_ge_pid(tgid, ns);
 	if (pid) {
-		tgid = pid->nr + 1;
+		tgid = pid_nr_ns(pid, ns) + 1;
 		task = pid_task(pid, PIDTYPE_PID);
 		/* What we to know is if the pid we have find is the
 		 * pid of a thread_group_leader.  Testing for task
@@ -2375,6 +2396,7 @@ int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir)
 	struct task_struct *reaper = get_proc_task(filp->f_path.dentry->d_inode);
 	struct task_struct *task;
 	int tgid;
+	struct pid_namespace *ns;
 
 	if (!reaper)
 		goto out_no_task;
@@ -2385,11 +2407,12 @@ int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir)
 			goto out;
 	}
 
+	ns = filp->f_dentry->d_sb->s_fs_info;
 	tgid = filp->f_pos - TGID_OFFSET;
-	for (task = next_tgid(tgid);
+	for (task = next_tgid(tgid, ns);
 	     task;
-	     put_task_struct(task), task = next_tgid(tgid + 1)) {
-		tgid = task->pid;
+	     put_task_struct(task), task = next_tgid(tgid + 1, ns)) {
+		tgid = task_pid_nr_ns(task, ns);
 		filp->f_pos = tgid + TGID_OFFSET;
 		if (proc_pid_fill_cache(filp, dirent, filldir, task, tgid) < 0) {
 			put_task_struct(task);
@@ -2513,6 +2536,7 @@ static struct dentry *proc_task_lookup(struct inode *dir, struct dentry * dentry
 	struct task_struct *task;
 	struct task_struct *leader = get_proc_task(dir);
 	unsigned tid;
+	struct pid_namespace *ns;
 
 	if (!leader)
 		goto out_no_task;
@@ -2521,14 +2545,15 @@ static struct dentry *proc_task_lookup(struct inode *dir, struct dentry * dentry
 	if (tid == ~0U)
 		goto out;
 
+	ns = dentry->d_sb->s_fs_info;
 	rcu_read_lock();
-	task = find_task_by_pid(tid);
+	task = find_task_by_pid_ns(tid, ns);
 	if (task)
 		get_task_struct(task);
 	rcu_read_unlock();
 	if (!task)
 		goto out;
-	if (leader->tgid != task->tgid)
+	if (!same_thread_group(leader, task))
 		goto out_drop_task;
 
 	result = proc_task_instantiate(dir, dentry, task, NULL);
@@ -2553,14 +2578,14 @@ out_no_task:
  * threads past it.
  */
 static struct task_struct *first_tid(struct task_struct *leader,
-					int tid, int nr)
+		int tid, int nr, struct pid_namespace *ns)
 {
 	struct task_struct *pos;
 
 	rcu_read_lock();
 	/* Attempt to start with the pid of a thread */
 	if (tid && (nr > 0)) {
-		pos = find_task_by_pid(tid);
+		pos = find_task_by_pid_ns(tid, ns);
 		if (pos && (pos->group_leader == leader))
 			goto found;
 	}
@@ -2629,6 +2654,7 @@ static int proc_task_readdir(struct file * filp, void * dirent, filldir_t filldi
 	ino_t ino;
 	int tid;
 	unsigned long pos = filp->f_pos;  /* avoiding "long long" filp->f_pos */
+	struct pid_namespace *ns;
 
 	task = get_proc_task(inode);
 	if (!task)
@@ -2662,12 +2688,13 @@ static int proc_task_readdir(struct file * filp, void * dirent, filldir_t filldi
 	/* f_version caches the tgid value that the last readdir call couldn't
 	 * return. lseek aka telldir automagically resets f_version to 0.
 	 */
+	ns = filp->f_dentry->d_sb->s_fs_info;
 	tid = (int)filp->f_version;
 	filp->f_version = 0;
-	for (task = first_tid(leader, tid, pos - 2);
+	for (task = first_tid(leader, tid, pos - 2, ns);
 	     task;
 	     task = next_tid(task), pos++) {
-		tid = task->pid;
+		tid = task_pid_nr_ns(task, ns);
 		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 */