From dd2cc4dff3b08ab54c4c177a080046bcc84ac41d Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Fri, 8 Feb 2008 04:21:43 -0800 Subject: [PATCH] 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 Cc: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/hostfs/hostfs_kern.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c index 2b9b35733aac..d0549cb4fb23 100644 --- a/fs/hostfs/hostfs_kern.c +++ b/fs/hostfs/hostfs_kern.c @@ -11,6 +11,7 @@ #include #include #include +#include #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) -- 2.30.2