Messages in this thread Patch in this message |  | | Date | Tue, 15 May 2001 13:16:49 +0200 | From | Peter Kundrat <> | Subject | Re: MS_RDONLY patch (do_remount_sb and cramfs/inode.c) |
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On Tue, May 15, 2001 at 12:24:06PM +0200, Peter Kundrat wrote: > On Tue, May 15, 2001 at 11:27:26AM +0200, Peter Kundrat wrote: > > This patch does: > > - set MS_RDONLY flag in cramfs superblock > > - doesnt allow -w remount in do_remount_sb > > if the filesystem has MS_RDONLY set. > > Oh, ignore the second part. Seems i'd have to supply remount_fs super > op to prevent that.
How about this one ? Similar thing could be done to other fs as well.
pkx
diff -ur -x *~ -x *.o -x .* Linux-2.4.3.orig/fs/cramfs/inode.c Linux-2.4.3.isdn.kgdb/fs/cramfs/inode.c --- Linux-2.4.3.orig/fs/cramfs/inode.c Fri Apr 6 08:09:07 2001 +++ Linux-2.4.3.isdn.kgdb/fs/cramfs/inode.c Tue May 15 12:56:32 2001 @@ -192,6 +192,8 @@ goto out; } + sb->s_flags |= MS_RDONLY; + /* Set it all up.. */ sb->s_op = &cramfs_ops; sb->s_root = d_alloc_root(get_cramfs_inode(sb, &super.root)); @@ -212,6 +214,14 @@ return 0; } +static int cramfs_remount (struct super_block * sb, int * flags, char * data) +{ + if (*flags & MS_RDONLY) + return 0; + else + return -EROFS; +} + /* * Read a cramfs directory entry. */ @@ -358,6 +368,7 @@ static struct super_operations cramfs_ops = { statfs: cramfs_statfs, + remount_fs: cramfs_remount, }; static DECLARE_FSTYPE_DEV(cramfs_fs_type, "cramfs", cramfs_read_super); -- Peter Kundrat peter@kundrat.sk - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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