pid namespaces: changes to show virtual ids to user

[linux-2.6-omap-h63xx.git] / fs / proc / base.c

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 21510c9aa89cb51688581c982547c967539c0e90..db7636041c107bd787ac281416c013abf0f85f53 100644 (file)
--- 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));
 }
 
@@ -2316,6 +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)
@@ -2325,8 +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();
@@ -2343,7 +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;
@@ -2351,9 +2354,9 @@ static struct task_struct *next_tgid(unsigned int tgid)
        rcu_read_lock();
 retry:
        task = NULL;
-       pid = find_ge_pid(tgid, &init_pid_ns);
+       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
@@ -2393,6 +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;
@@ -2403,11 +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);
@@ -2531,6 +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;
@@ -2539,8 +2545,9 @@ 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();
@@ -2571,14 +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;
        }
@@ -2647,6 +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)
@@ -2680,12 +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 */