X-Git-Url: https://git.stricted.de/?p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git;a=blobdiff_plain;f=fs%2Fproc%2Fbase.c;h=4b6f38b759c66bc687424ee73c4fabff2535a604;hp=dd51e50001fe7aff4e51ffac502d39158ae5581d;hb=d242a5721cfaa22be666712d2788c6a9ad3f2fa5;hpb=fea0f9ff56258734ff1c49008c36ef6904b8c541

diff --git a/fs/proc/base.c b/fs/proc/base.c
index dd51e50001fe..4b6f38b759c6 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -139,6 +139,12 @@ struct pid_entry {
 		NULL, &proc_single_file_operations,	\
 		{ .proc_show = show } )
 
+/* ANDROID is for special files in /proc. */
+#define ANDROID(NAME, MODE, OTYPE)			\
+	NOD(NAME, (S_IFREG|(MODE)),			\
+		&proc_##OTYPE##_inode_operations,	\
+		&proc_##OTYPE##_operations, {})
+
 /*
  * Count the number of hardlinks for the pid_entry table, excluding the .
  * and .. links.
@@ -844,7 +850,8 @@ static ssize_t environ_read(struct file *file, char __user *buf,
 	int ret = 0;
 	struct mm_struct *mm = file->private_data;
 
-	if (!mm)
+	/* Ensure the process spawned far enough to have an environment. */
+	if (!mm || !mm->env_end)
 		return 0;
 
 	page = (char *)__get_free_page(GFP_TEMPORARY);
@@ -914,8 +921,8 @@ static ssize_t oom_adj_read(struct file *file, char __user *buf, size_t count,
 		if (task->signal->oom_score_adj == OOM_SCORE_ADJ_MAX)
 			oom_adj = OOM_ADJUST_MAX;
 		else
-			oom_adj = (task->signal->oom_score_adj * -OOM_DISABLE) /
-				  OOM_SCORE_ADJ_MAX;
+			oom_adj = ((task->signal->oom_score_adj * -OOM_DISABLE * 10)/OOM_SCORE_ADJ_MAX+5)
+			             /10; //modify for oom_score_adj->oom_adj round
 		unlock_task_sighand(task, &flags);
 	}
 	put_task_struct(task);
@@ -973,7 +980,7 @@ static ssize_t oom_adj_write(struct file *file, const char __user *buf,
 	if (oom_adj == OOM_ADJUST_MAX)
 		oom_adj = OOM_SCORE_ADJ_MAX;
 	else
-		oom_adj = (oom_adj * OOM_SCORE_ADJ_MAX) / -OOM_DISABLE;
+		oom_adj = ((oom_adj * OOM_SCORE_ADJ_MAX * 10) / -OOM_DISABLE + 5)/10;  //modify for oom_adj->oom_score_adj round
 
 	if (oom_adj < task->signal->oom_score_adj &&
 	    !capable(CAP_SYS_RESOURCE)) {
@@ -1000,6 +1007,35 @@ out:
 	return err < 0 ? err : count;
 }
 
+static int oom_adjust_permission(struct inode *inode, int mask)
+{
+	uid_t uid;
+	struct task_struct *p;
+
+	p = get_proc_task(inode);
+	if(p) {
+		uid = task_uid(p);
+		put_task_struct(p);
+	}
+
+	/*
+	 * System Server (uid == 1000) is granted access to oom_adj of all 
+	 * android applications (uid > 10000) as and services (uid >= 1000)
+	 */
+	if (p && (current_fsuid() == 1000) && (uid >= 1000)) {
+		if (inode->i_mode >> 6 & mask) {
+			return 0;
+		}
+	}
+
+	/* Fall back to default. */
+	return generic_permission(inode, mask);
+}
+
+static const struct inode_operations proc_oom_adj_inode_operations = {
+	.permission	= oom_adjust_permission,
+};
+
 static const struct file_operations proc_oom_adj_operations = {
 	.read		= oom_adj_read,
 	.write		= oom_adj_write,
@@ -1825,6 +1861,7 @@ static int proc_map_files_get_link(struct dentry *dentry, struct path *path)
 	if (rc)
 		goto out_mmput;
 
+	rc = -ENOENT;
 	down_read(&mm->mmap_sem);
 	vma = find_exact_vma(mm, vm_start, vm_end);
 	if (vma && vma->vm_file) {
@@ -2118,6 +2155,7 @@ static int show_timer(struct seq_file *m, void *v)
 		nstr[notify & ~SIGEV_THREAD_ID],
 		(notify & SIGEV_THREAD_ID) ? "tid" : "pid",
 		pid_nr_ns(timer->it_pid, tp->ns));
+	seq_printf(m, "ClockID: %d\n", timer->it_clock);
 
 	return 0;
 }
@@ -2610,6 +2648,57 @@ static const struct file_operations proc_projid_map_operations = {
 	.llseek		= seq_lseek,
 	.release	= proc_id_map_release,
 };
+
+static int proc_setgroups_open(struct inode *inode, struct file *file)
+{
+	struct user_namespace *ns = NULL;
+	struct task_struct *task;
+	int ret;
+
+	ret = -ESRCH;
+	task = get_proc_task(inode);
+	if (task) {
+		rcu_read_lock();
+		ns = get_user_ns(task_cred_xxx(task, user_ns));
+		rcu_read_unlock();
+		put_task_struct(task);
+	}
+	if (!ns)
+		goto err;
+
+	if (file->f_mode & FMODE_WRITE) {
+		ret = -EACCES;
+		if (!ns_capable(ns, CAP_SYS_ADMIN))
+			goto err_put_ns;
+	}
+
+	ret = single_open(file, &proc_setgroups_show, ns);
+	if (ret)
+		goto err_put_ns;
+
+	return 0;
+err_put_ns:
+	put_user_ns(ns);
+err:
+	return ret;
+}
+
+static int proc_setgroups_release(struct inode *inode, struct file *file)
+{
+	struct seq_file *seq = file->private_data;
+	struct user_namespace *ns = seq->private;
+	int ret = single_release(inode, file);
+	put_user_ns(ns);
+	return ret;
+}
+
+static const struct file_operations proc_setgroups_operations = {
+	.open		= proc_setgroups_open,
+	.write		= proc_setgroups_write,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= proc_setgroups_release,
+};
 #endif /* CONFIG_USER_NS */
 
 static int proc_pid_personality(struct seq_file *m, struct pid_namespace *ns,
@@ -2696,7 +2785,7 @@ static const struct pid_entry tgid_base_stuff[] = {
 	REG("cgroup",  S_IRUGO, proc_cgroup_operations),
 #endif
 	INF("oom_score",  S_IRUGO, proc_oom_score),
-	REG("oom_adj",    S_IRUGO|S_IWUSR, proc_oom_adj_operations),
+	ANDROID("oom_adj", S_IRUGO|S_IWUSR, oom_adj),
 	REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations),
 #ifdef CONFIG_AUDITSYSCALL
 	REG("loginuid",   S_IWUSR|S_IRUGO, proc_loginuid_operations),
@@ -2718,6 +2807,7 @@ static const struct pid_entry tgid_base_stuff[] = {
 	REG("uid_map",    S_IRUGO|S_IWUSR, proc_uid_map_operations),
 	REG("gid_map",    S_IRUGO|S_IWUSR, proc_gid_map_operations),
 	REG("projid_map", S_IRUGO|S_IWUSR, proc_projid_map_operations),
+	REG("setgroups",  S_IRUGO|S_IWUSR, proc_setgroups_operations),
 #endif
 #ifdef CONFIG_CHECKPOINT_RESTORE
 	REG("timers",	  S_IRUGO, proc_timers_operations),
@@ -3071,6 +3161,7 @@ static const struct pid_entry tid_base_stuff[] = {
 	REG("uid_map",    S_IRUGO|S_IWUSR, proc_uid_map_operations),
 	REG("gid_map",    S_IRUGO|S_IWUSR, proc_gid_map_operations),
 	REG("projid_map", S_IRUGO|S_IWUSR, proc_projid_map_operations),
+	REG("setgroups",  S_IRUGO|S_IWUSR, proc_setgroups_operations),
 #endif
 };