From d81625587f4fac44a4367c468ba2fe2d981460f8 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Fri, 23 Mar 2012 14:40:56 -0400 Subject: cifs: handle "sloppy" option appropriately cifs.ko has historically been tolerant of options that it does not recognize. This is not normal behavior for a filesystem however. Usually, it should only do this if you mount with '-s', and autofs generally passes -s to the mount command to allow this behavior. This patch makes cifs handle the option "sloppy" appropriately. If it's present in the options string, then the client will tolerate options that it doesn't recognize. If it's not present then the client will error out in the presence of options that it does not recognize and throw an error message explaining why. There is also a companion patch being proposed for mount.cifs to make it append "sloppy" to the mount options when passed the '-s' flag. This also should (obviously) be applied on top of Sachin's conversion to the standard option parser. Signed-off-by: Jeff Layton Acked-By: Sachin Prabhu --- fs/cifs/connect.c | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-) (limited to 'fs/cifs') diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 3d72218bd96..980815426ac 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -88,7 +88,7 @@ enum { Opt_sign, Opt_seal, Opt_direct, Opt_strictcache, Opt_noac, Opt_fsc, Opt_mfsymlinks, - Opt_multiuser, + Opt_multiuser, Opt_sloppy, /* Mount options which take numeric value */ Opt_backupuid, Opt_backupgid, Opt_uid, @@ -167,6 +167,7 @@ static const match_table_t cifs_mount_option_tokens = { { Opt_fsc, "fsc" }, { Opt_mfsymlinks, "mfsymlinks" }, { Opt_multiuser, "multiuser" }, + { Opt_sloppy, "sloppy" }, { Opt_backupuid, "backupuid=%s" }, { Opt_backupgid, "backupgid=%s" }, @@ -1186,6 +1187,8 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, short int override_gid = -1; bool uid_specified = false; bool gid_specified = false; + bool sloppy = false; + char *invalid = NULL; char *nodename = utsname()->nodename; char *string = NULL; char *tmp_end, *value; @@ -1423,6 +1426,9 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, case Opt_multiuser: vol->multiuser = true; break; + case Opt_sloppy: + sloppy = true; + break; /* Numeric Values */ case Opt_backupuid: @@ -1870,8 +1876,12 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, goto cifs_parse_mount_err; break; default: - printk(KERN_WARNING "CIFS: Unknown mount option %s\n", - data); + /* + * An option we don't recognize. Save it off for later + * if we haven't already found one + */ + if (!invalid) + invalid = data; break; } /* Free up any allocated string */ @@ -1879,6 +1889,11 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, string = NULL; } + if (!sloppy && invalid) { + printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid); + goto cifs_parse_mount_err; + } + #ifndef CONFIG_KEYS /* Muliuser mounts require CONFIG_KEYS support */ if (vol->multiuser) { -- cgit v1.2.3