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From 1f1742f5d55afd1ab5b41661c334aba10245f696 Mon Sep 17 00:00:00 2001
From: Sasha Levin <sashal@kernel.org>
Date: Mon, 15 Apr 2024 16:47:49 +0900
Subject: cifs: reinstate original behavior again for forceuid/forcegid
From: Takayuki Nagata <tnagata@redhat.com>
[ Upstream commit 77d8aa79ecfb209308e0644c02f655122b31def7 ]
forceuid/forcegid should be enabled by default when uid=/gid= options are
specified, but commit 24e0a1eff9e2 ("cifs: switch to new mount api")
changed the behavior. Due to the change, a mounted share does not show
intentional uid/gid for files and directories even though uid=/gid=
options are specified since forceuid/forcegid are not enabled.
This patch reinstates original behavior that overrides uid/gid with
specified uid/gid by the options.
Fixes: 24e0a1eff9e2 ("cifs: switch to new mount api")
Signed-off-by: Takayuki Nagata <tnagata@redhat.com>
Acked-by: Paulo Alcantara (Red Hat) <pc@manguebit.com>
Acked-by: Ronnie Sahlberg <lsahlber@redhat.com>
Acked-by: Tom Talpey <tom@talpey.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/smb/client/fs_context.c | 12 ++++++++++++
fs/smb/client/fs_context.h | 2 ++
2 files changed, 14 insertions(+)
diff --git a/fs/smb/client/fs_context.c b/fs/smb/client/fs_context.c
index d9fe17b2ba375..775b0ca605892 100644
--- a/fs/smb/client/fs_context.c
+++ b/fs/smb/client/fs_context.c
@@ -715,6 +715,16 @@ static int smb3_fs_context_validate(struct fs_context *fc)
/* set the port that we got earlier */
cifs_set_port((struct sockaddr *)&ctx->dstaddr, ctx->port);
+ if (ctx->uid_specified && !ctx->forceuid_specified) {
+ ctx->override_uid = 1;
+ pr_notice("enabling forceuid mount option implicitly because uid= option is specified\n");
+ }
+
+ if (ctx->gid_specified && !ctx->forcegid_specified) {
+ ctx->override_gid = 1;
+ pr_notice("enabling forcegid mount option implicitly because gid= option is specified\n");
+ }
+
if (ctx->override_uid && !ctx->uid_specified) {
ctx->override_uid = 0;
pr_notice("ignoring forceuid mount option specified with no uid= option\n");
@@ -984,12 +994,14 @@ static int smb3_fs_context_parse_param(struct fs_context *fc,
ctx->override_uid = 0;
else
ctx->override_uid = 1;
+ ctx->forceuid_specified = true;
break;
case Opt_forcegid:
if (result.negated)
ctx->override_gid = 0;
else
ctx->override_gid = 1;
+ ctx->forcegid_specified = true;
break;
case Opt_perm:
if (result.negated)
diff --git a/fs/smb/client/fs_context.h b/fs/smb/client/fs_context.h
index b3d51b345eaef..61776572b8d2d 100644
--- a/fs/smb/client/fs_context.h
+++ b/fs/smb/client/fs_context.h
@@ -156,6 +156,8 @@ enum cifs_param {
};
struct smb3_fs_context {
+ bool forceuid_specified;
+ bool forcegid_specified;
bool uid_specified;
bool cruid_specified;
bool gid_specified;
--
2.43.0
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