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authorMiklos Szeredi <mszeredi@suse.cz>2008-02-08 04:21:43 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-08 09:22:40 -0800
commitdd2cc4dff3b08ab54c4c177a080046bcc84ac41d (patch)
tree251643860af975f96701685729cfdec03a8b5ad5
parentd1875dbaa58e4894f7d9321d1c280fb23ca9f9e5 (diff)
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: Miklos Szeredi <mszeredi@suse.cz> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/hostfs/hostfs_kern.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 2b9b35733aa..d0549cb4fb2 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -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)