5.15-stable review patch. If anyone has any objections, please let me know.
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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/cifs/fs_context.c | 12 ++++++++++++ fs/cifs/fs_context.h | 2 ++ 2 files changed, 14 insertions(+)
diff --git a/fs/cifs/fs_context.c b/fs/cifs/fs_context.c index 6347e759b5ccf..fb3651513f83a 100644 --- a/fs/cifs/fs_context.c +++ b/fs/cifs/fs_context.c @@ -672,6 +672,16 @@ 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"); @@ -903,12 +913,14 @@ 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/cifs/fs_context.h b/fs/cifs/fs_context.h index 3cf8d6235162d..74bb19ec7c839 100644 --- a/fs/cifs/fs_context.h +++ b/fs/cifs/fs_context.h @@ -152,6 +152,8 @@ enum cifs_param { };
struct smb3_fs_context { + bool forceuid_specified; + bool forcegid_specified; bool uid_specified; bool cruid_specified; bool gid_specified;