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Commit dd2cc4df authored by Miklos Szeredi's avatar Miklos Szeredi Committed by Linus Torvalds
Browse files

mount options: fix hostfs 



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: default avatarMiklos Szeredi <mszeredi@suse.cz>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent d1875dba

fs/hostfs/hostfs_kern.c

+14 −0
Original line number Diff line number Diff line
@@ -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 inode *inode) 
	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)