Merge branch 'linus' into timers/nohz

[linux-2.6] / fs / proc / base.c

diff --git a/fs/proc/base.c b/fs/proc/base.c
index c447e0743a3c95e231bc0e9f98a33d474c2e86bb..58c3e6a8e15e160ec3d6af3aabe6138b666b00b8 100644 (file)
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -127,6 +127,25 @@ struct pid_entry {
                NULL, &proc_single_file_operations,     \
                { .proc_show = &proc_##OTYPE } )
 
+/*
+ * Count the number of hardlinks for the pid_entry table, excluding the .
+ * and .. links.
+ */
+static unsigned int pid_entry_count_dirs(const struct pid_entry *entries,
+       unsigned int n)
+{
+       unsigned int i;
+       unsigned int count;
+
+       count = 0;
+       for (i = 0; i < n; ++i) {
+               if (S_ISDIR(entries[i].mode))
+                       ++count;
+       }
+
+       return count;
+}
+
 int maps_protect;
 EXPORT_SYMBOL(maps_protect);
 
@@ -214,7 +233,7 @@ static int check_mem_permission(struct task_struct *task)
         */
        if (task->parent == current && (task->ptrace & PT_PTRACED) &&
            task_is_stopped_or_traced(task) &&
-           ptrace_may_attach(task))
+           ptrace_may_access(task, PTRACE_MODE_ATTACH))
                return 0;
 
        /*
@@ -232,7 +251,8 @@ struct mm_struct *mm_for_maps(struct task_struct *task)
        task_lock(task);
        if (task->mm != mm)
                goto out;
-       if (task->mm != current->mm && __ptrace_may_attach(task) < 0)
+       if (task->mm != current->mm &&
+           __ptrace_may_access(task, PTRACE_MODE_READ) < 0)
                goto out;
        task_unlock(task);
        return mm;
@@ -499,7 +519,7 @@ static int proc_fd_access_allowed(struct inode *inode)
         */
        task = get_proc_task(inode);
        if (task) {
-               allowed = ptrace_may_attach(task);
+               allowed = ptrace_may_access(task, PTRACE_MODE_READ);
                put_task_struct(task);
        }
        return allowed;
@@ -885,7 +905,7 @@ static ssize_t environ_read(struct file *file, char __user *buf,
        if (!task)
                goto out_no_task;
 
-       if (!ptrace_may_attach(task))
+       if (!ptrace_may_access(task, PTRACE_MODE_READ))
                goto out;
 
        ret = -ENOMEM;
@@ -2585,10 +2605,9 @@ static struct dentry *proc_pid_instantiate(struct inode *dir,
        inode->i_op = &proc_tgid_base_inode_operations;
        inode->i_fop = &proc_tgid_base_operations;
        inode->i_flags|=S_IMMUTABLE;
-       inode->i_nlink = 5;
-#ifdef CONFIG_SECURITY
-       inode->i_nlink += 1;
-#endif
+
+       inode->i_nlink = 2 + pid_entry_count_dirs(tgid_base_stuff,
+               ARRAY_SIZE(tgid_base_stuff));
 
        dentry->d_op = &pid_dentry_operations;
 
@@ -2816,10 +2835,9 @@ static struct dentry *proc_task_instantiate(struct inode *dir,
        inode->i_op = &proc_tid_base_inode_operations;
        inode->i_fop = &proc_tid_base_operations;
        inode->i_flags|=S_IMMUTABLE;
-       inode->i_nlink = 4;
-#ifdef CONFIG_SECURITY
-       inode->i_nlink += 1;
-#endif
+
+       inode->i_nlink = 2 + pid_entry_count_dirs(tid_base_stuff,
+               ARRAY_SIZE(tid_base_stuff));
 
        dentry->d_op = &pid_dentry_operations;