From: Miklos Szeredi <mszeredi@xxxxxxx>
Add the "host path" option to /proc/mounts for UML hostfs filesystems.
The mount source (mnt_devname) should really be used for this, but not
easy to change now in a backward compatible way.
Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxx>
---
Index: linux/fs/hostfs/hostfs_kern.c
===================================================================
--- linux.orig/fs/hostfs/hostfs_kern.c 2008-01-17 19:00:55.000000000 +0100
+++ linux/fs/hostfs/hostfs_kern.c 2008-01-21 19:19:55.000000000 +0100
@@ -11,6 +11,7 @@
#include <linux/mm.h>
#include <linux/pagemap.h>
#include <linux/statfs.h>
+#include <linux/seq_file.h>
#include "hostfs.h"
#include "init.h"
#include "kern.h"
@@ -322,12 +323,25 @@ static void hostfs_destroy_inode(struct
kfree(HOSTFS_I(inode));
}
+static int hostfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
+{
+ struct inode *root = vfs->mnt_sb->s_root->d_inode;
+ const char *root_path = HOSTFS_I(root)->host_filename;
+ size_t offset = strlen(root_ino) + 1;
+
+ if (strlen(root_path) > offset)
+ seq_printf(seq, ",%s", root_path + offset);
+
+ return 0;
+}
+
static const struct super_operations hostfs_sbops = {
.alloc_inode = hostfs_alloc_inode,
.drop_inode = generic_delete_inode,
.delete_inode = hostfs_delete_inode,
.destroy_inode = hostfs_destroy_inode,
.statfs = hostfs_statfs,
+ .show_options = hostfs_show_options,
};
int hostfs_readdir(struct file *file, void *ent, filldir_t filldir)
--
-
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