patch-2.4.19 linux-2.4.19/fs/proc/base.c

• Lines: 82
• Date: Fri Aug 2 17:39:45 2002
• Orig file: linux-2.4.18/fs/proc/base.c
• Orig date: Mon Feb 25 11:38:09 2002

diff -urN linux-2.4.18/fs/proc/base.c linux-2.4.19/fs/proc/base.c
@@ -23,6 +23,8 @@
 #include <linux/init.h>
 #include <linux/file.h>
 #include <linux/string.h>
+#include <linux/seq_file.h>
+#include <linux/namespace.h>
 
 /*
  * For hysterical raisins we keep the same inumbers as in the old procfs.
@@ -246,6 +248,46 @@
 	read:		pid_maps_read,
 };
 
+extern struct seq_operations mounts_op;
+static int mounts_open(struct inode *inode, struct file *file)
+{
+	struct task_struct *task = inode->u.proc_i.task;
+	int ret = seq_open(file, &mounts_op);
+
+	if (!ret) {
+		struct seq_file *m = file->private_data;
+		struct namespace *namespace;
+		task_lock(task);
+		namespace = task->namespace;
+		if (namespace)
+			get_namespace(namespace);
+		task_unlock(task);
+
+		if (namespace)
+			m->private = namespace;
+		else {
+			seq_release(inode, file);
+			ret = -EINVAL;
+		}
+	}
+	return ret;
+}
+
+static int mounts_release(struct inode *inode, struct file *file)
+{
+	struct seq_file *m = file->private_data;
+	struct namespace *namespace = m->private;
+	put_namespace(namespace);
+	return seq_release(inode, file);
+}
+
+static struct file_operations proc_mounts_operations = {
+	open:		mounts_open,
+	read:		seq_read,
+	llseek:		seq_lseek,
+	release:	mounts_release,
+};
+
 #define PROC_BLOCK_SIZE	(3*1024)		/* 4K page size but our output routines use some slack for overruns */
 
 static ssize_t proc_info_read(struct file * file, char * buf,
@@ -497,6 +539,7 @@
 	PROC_PID_STATM,
 	PROC_PID_MAPS,
 	PROC_PID_CPU,
+	PROC_PID_MOUNTS,
 	PROC_PID_FD_DIR = 0x8000,	/* 0x8000-0xffff */
 };
 
@@ -516,6 +559,7 @@
   E(PROC_PID_CWD,	"cwd",		S_IFLNK|S_IRWXUGO),
   E(PROC_PID_ROOT,	"root",		S_IFLNK|S_IRWXUGO),
   E(PROC_PID_EXE,	"exe",		S_IFLNK|S_IRWXUGO),
+  E(PROC_PID_MOUNTS,	"mounts",	S_IFREG|S_IRUGO),
   {0,0,NULL,0}
 };
 #undef E
@@ -881,6 +925,9 @@
 			inode->i_op = &proc_mem_inode_operations;
 			inode->i_fop = &proc_mem_operations;
 			break;
+		case PROC_PID_MOUNTS:
+			inode->i_fop = &proc_mounts_operations;
+			break;
 		default:
 			printk("procfs: impossible type (%d)",p->type);
 			iput(inode);