From af904deaf6da3f3285eb0a06a3dc6a1af0251030 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Mon, 8 Sep 2008 11:58:13 -0400 Subject: [PATCH] NFS: Restore missing hunk in NFS mount option parser Automounter maps can contain mount options valid for other NFS implementations but not for Linux. The Linux automounter uses the mount command's "-s" command line option ("s" for "sloppy") so that mount requests containing such options are not rejected. Commit f45663ce5fb30f76a3414ab3ac69f4dd320e760a attempted to address a known regression with text-based NFS mount option parsing. Unrecognized mount options would cause mount requests to fail, even if the "-s" option was used on the mount command line. Unfortunately, this commit was not complete as submitted. It adds a new mount option, "sloppy". But it is missing a hunk, so it now allows NFS mounts with unrecognized mount options, even if the "sloppy" option is not present. This could be a problem if a required critical mount option such as "sync" is misspelled, for example, and is considered a regression from 2.6.26. This patch restores the missing hunk. Now, the default behavior of text-based NFS mount options is as before: any unrecognized mount option will cause the mount to fail. Please include this in 2.6.27-rc. Thanks to Neil Brown for reporting this. Signed-off-by: Chuck Lever Acked-by: J. Bruce Fields Signed-off-by: Linus Torvalds --- fs/nfs/super.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 9abcd2b329f7..e9b20173fef3 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -1279,6 +1279,12 @@ static int nfs_parse_mount_options(char *raw, } } + if (errors > 0) { + dfprintk(MOUNT, "NFS: parsing encountered %d error%s\n", + errors, (errors == 1 ? "" : "s")); + if (!sloppy) + return 0; + } return 1; out_nomem: -- 2.20.1